CN110312448A - Forming surface connector, manufacturing method of forming surface connector, and forming device - Google Patents

Abstract

The molding surface connecting piece (1, 1a, 2, 3) of the invention comprises: a base material section (10) that is elongated in the 1 st direction; and a plurality of engaging elements (20, 20a, 20b, 20c, 20d, 70) provided upright on the upper surface of the base (10), the engaging elements (20, 20a, 20b, 20c, 20d, 70) having: a rod portion (21, 21c, 21d, 71); and a hook (31, 31b, 81) protruding from the upper end of the rod (21, 21c, 21d, 71) in the 2 nd direction. The hook portion (31, 31b, 81) has a tapered shape toward the hook tip. The lower surfaces of the hook sections (31, 31b, 81) have compression surfaces (32, 82) that are formed to be smoother than the upper end surfaces of the hook sections (31, 31b, 81) by being pressed and compressed by the cavity surface of a molding die. The molded surface fastener (1, 1a, 2, 3) is a novel molded surface fastener which has a high peel strength to the ring of the female surface fastener and can provide a good skin touch.

Description

Forming surface connector, manufacturing method of forming surface connector, and forming device

technical field

The present invention relates to a molding surface connector in which a plurality of engaging elements are disposed on a flat plate-shaped substrate portion, a method for manufacturing the molding surface connector, and a molding device used for manufacturing the molding surface connector.

Background technique

Conventionally, there is known a hook-up product that is used in combination with a female-type hook-and-loop fastener having a plurality of rings and a male-shaped molded hook-and-loop fastener that is detachable from the female-shaped hook-and-loop fastener. In general, a male molded surface connector manufactured by molding synthetic resin is formed by vertically arranging a plurality of male engaging elements having a mushroom shape or the like on the upper surface of a flat base.

Hook fastener products having such male-type surface fasteners are currently widely used in a variety of products, and are often used in protective devices such as disposable diapers, diaper panties for infants, and joints to protect hands and feet. Products that are detachable from the body, such as waist tights (lumbar pain belts), gloves, etc.

In molding surface fasteners used in disposable diapers and the like, J-shaped, palm tree-shaped, mushroom-shaped, etc. are generally known as representative forms of male engaging elements. For example, the J-shaped engaging element protrudes upward from the base portion, and has a form in which the upper end portion is bent into a hook shape. A molding surface connector having such a J-shaped engaging element is described in International Publication No. 1998/014086 (Patent Document 1: Corresponding to JP 2001-501120 A) and the like.

The palm tree-shaped engaging element has the form of: a stem protruding vertically from the base; Bending in one direction and extending on the other. A molded surface fastener having such palm tree-shaped engaging elements is described in US Patent No. 7,516,524 (Patent Document 2) and the like.

The mushroom-shaped engaging element has the following form: it has: a rod portion, which protrudes vertically from the base portion; The entire outer periphery of the upper end of the rod portion is integrally formed so as to protrude outward. A molding surface connector having such a mushroom-shaped engaging element is described in International Publication No. 1994/023610 (Patent Document 3: Corresponding to Japanese Patent Publication No. 8-508910), International Publication No. 2000/000053 Gazette (Patent Document 4: Correspondence to JP 2002-519078 Gazette) and the like.

prior art literature

patent documents

Patent Document 1: International Publication No. 1998/014086

Patent Document 2: Specification of U.S. Patent No. 7,516,524

Patent Document 3: International Publication No. 1994/023610

Patent Document 4: International Publication No. 2000/000053

Contents of the invention

The problem to be solved by the invention

For the molded surface connectors having J-shaped engaging elements and palm tree-shaped engaging elements such as those described above, when the loops (such as fibers of non-woven fabric) of the female type surface connecting elements are engaged Next, it is difficult to pull out the ring from the J-shaped or palm tree-shaped engaging element. Therefore, the molded surface connector having J-shaped or palm tree-shaped engaging elements tends to have a higher peel strength than the female profiled surface connector.

Generally speaking, these forming surface connectors having a plurality of J-shaped or palm tree-shaped engaging elements are formed by using a die wheel with a plurality of cavities having a shape corresponding to the engaging elements formed on the outer peripheral surface. It is produced by continuously molding synthetic resin. In addition, when using a die wheel to continuously form a J-shaped or palm tree-shaped engaging element, it is necessary to shape the upper end of the engaging element in one direction or in two directions opposite to each other. The direction is hooked and protruded.

However, in conventional molding, in order to pull out the engaging element from the cavity of the die wheel without damaging the engaging element, the direction of the hook-shaped engaging head can only be directed along the conveying direction of the molded body. The direction of the machine direction (MD). Therefore, conventionally, it has not been possible to continuously manufacture a molded surface connector having an engaging element with a hook-shaped engaging head oriented in a cross direction (CD) intersecting (orthogonal to) the machine direction (MD).

In addition, in the case of conventional J-shaped or palm tree-shaped engaging elements, the upper end portion of the engaging element is bent into a hook shape, so the area of the upper end surface (tip surface) of the engaging element is small. Therefore, when touching the upper surface side of the engaging surface of the molding surface connector, the area in contact with the skin becomes small. Therefore, when such a molded surface fastener is used for products that are easy to contact with the skin, such as disposable diapers and diaper panties, or products that require a soft touch, the skin touch of the product may be deteriorated.

In addition, the base end portion or stem portion of the conventional J-shaped or palm tree-shaped engaging element is easy to be formed thinner. Therefore, it is also conceivable that when the female surface connector is strongly pressed to the male molded surface connector (or, the male molded surface connector is pressed against the female molded surface connector) to engage the two, The base end portion or the stem portion of the engaging element is liable to bend due to the pressing force, resulting in breakage of the forming surface connector.

On the other hand, the mushroom-shaped engaging element is formed with a disc-shaped engaging head at the upper end of the engaging element, so that the upper end surface of the engaging element can be engaged in a J-shaped or palm tree-shaped A large area of the element is exposed above. Therefore, the molded surface connector having the mushroom-shaped engaging elements is characterized by a good touch on the skin. In addition, since it is easy to form the rod portion of the engaging element thick, the rod portion is less likely to bend even when subjected to the above-mentioned pressing force, and the shape of the engaging element can be stably maintained.

Furthermore, with the molding surface fastener having the mushroom-shaped engaging elements, a plurality of rings can be stably engaged when engaging the nonwoven fabric as the female surface fastener. However, the upper end of the mushroom-shaped engaging element is not bent into a hook shape as in the J-shaped or palm tree-shaped form. Therefore, in the case of mushroom-shaped engaging elements, the peel strength may be weaker than that of J-shaped or palm tree-shaped engaging elements, and improvement is required.

In addition, in general, there are cases where the engagement rate of the ring, the peel strength, etc. of the male surface fastener tend to change depending on the structure of the nonwoven fabric used as the female surface fastener, and the performance of the male surface fastener is affected. Relative to the affinity of non-woven fabrics. Therefore, it is desired to provide abundantly various types of male forming surface connectors by increasing the variation of the shape of the engaging elements so that the male surface connectors can be selected according to nonwoven fabrics and product applications.

The present invention has been made in view of the above-mentioned conventional problems, and a specific object thereof is to provide a molded surface connector having properties different from conventional ones by providing engaging elements with a new and characteristic form. Another object of the present invention is to provide a manufacturing method and a molding apparatus capable of stably manufacturing a molding surface fastener having properties different from conventional ones.

solutions to problems

In order to achieve the above object, the molding surface connector provided by the present invention is a molding surface connector made of synthetic resin, and the molding surface connector has: a flat plate extending in a second direction intersecting with each other, and elongated in the first direction; and a plurality of engaging elements, which are erected on the upper surface of the base material part, and the engaging elements have: rods part, which stands up from the base part; and at least one hook part, which protrudes from the upper end part of the rod part along the second direction. The main feature of this forming surface connector is that the The hook portion has a tapered shape in which a dimension in the first direction decreases toward a hook tip of the hook portion, and a lower surface of the hook portion partially has a compression formed to be smoother than an upper surface of the hook portion. noodle.

In the forming surface connector according to the present invention, it is preferable that the upper surface of the hook portion is arranged higher than the upper surface of the rod portion by a step, and that the hook portion has a shape: When viewing the engaging element, the upper surface of the hook portion is convex, and the lower surface of the hook portion is non-convex.

In addition, in the molding surface connector of the present invention, a part of the upper surface of the hook portion may be formed continuously from the upper surface of the rod portion, and the hook portion may have a shape: When viewing the engaging element from a direction 1, the upper surface of the hook portion is convex, and the lower surface of the hook portion is non-convex.

In this case, it is preferable that the outer surface of the upper end portion of the rod portion is formed into a spherical surface.

Furthermore, in the molded surface connector according to the present invention, the upper surface of the hook portion and the upper surface of the rod portion may be formed as a single flat surface, and the tip end portion of the hook portion may be disposed inclined downward.

In this case, it is preferable that the engaging element has a pair of reinforcing ribs, and the pair of reinforcing ribs are arranged on both sides of the hook in the first direction and connect the upper ends of the hook. portion and the rod portion.

In the molding surface fastener of the present invention as described above, it is preferable that the hook portion is formed asymmetrically in the width direction of the hook portion when the hook portion is viewed from the second direction.

In addition, another aspect of the molding surface connector provided by the present invention is a molding surface connector made of synthetic resin, and the molding surface connector has: a base portion formed along the first direction and in contact with the first A flat plate extending in a second direction intersecting with the first direction, and elongated in the first direction; and a plurality of engaging elements, which are erected on the upper surface of the base material part, and the engaging elements have: a rod portion standing up from the base material portion; and at least one hook portion protruding from the upper end portion of the rod portion along the second direction. The main feature of this forming surface connector is that The hook portion has a tapered shape in which the dimension in the first direction gradually decreases toward the hook tip of the hook portion, and when the hook portion is viewed from the second direction, the hook portion is formed so that The width direction of the hook portion is asymmetric.

In this case, it is preferable that the lower surface of the hook portion partially has a compression surface formed smoother than the upper surface of the hook portion.

In addition, when the hook portion is formed asymmetrically in the width direction, it is preferable that one end portion of the compression surface of the hook portion in the first direction is arranged at a lower position than the compression surface. The other end portion in the first direction is at a higher position, and when the engaging element is viewed from above, the top end portion of the hook portion is disposed toward the center position in the first direction relative to the rod portion. A position deviated from the one end side in the first direction.

Furthermore, it is preferable that the radius of curvature at the tip of the hook is set within a range of not less than 0.06 mm and not more than 0.18 mm when the hook is viewed from the first direction.

In addition, in the molding surface connector according to the present invention, it is preferable that one of the hooks is arranged for one of the rods, and the rod has a A hook placement surface arranged in a protruding direction of the hook portion, the hook placement surface has a single flat surface formed from a position lower than the hook portion toward the base material portion, and is connected to the The upper surface of the base portion is perpendicular to and perpendicular to the second direction.

In this case, it is preferable that the rod part has a rod back surface arranged on the opposite side of the hook arrangement surface in the second direction when the engaging element is viewed from the first direction. The back surface of the rod has a shape in which a dimension between the hook arrangement surface of the rod part and the back surface of the rod gradually decreases as the distance between the upper surface of the base part and the back surface of the rod part decreases.

In addition, it is preferable that when the engaging element is viewed from the first direction, the rear surface of the rod has an upper curved surface that is convexly arranged on the upper end of the rod and a concave surface that is arranged on the upper end of the rod. The lower curved surface of the lower end of the stem.

Furthermore, it is preferable that, when the engaging element is viewed from the first direction, the hook portion has a shape in which the upper surface of the hook portion has a shape that is larger than the upper side curved portion of the rod portion. A convex shape with a small curvature radius.

Furthermore, in the molding surface connector of the present invention, it is preferable that the maximum dimension of the rod portion in the second direction is set to be 0.1 mm or more and 1.5 mm or less, and the hook portion is set from the maximum dimension to 1.5 mm. A maximum protrusion dimension in the second direction in which the rod portion protrudes is set to be 0.01 mm or more and 0.5 mm or less.

Next, the method of manufacturing a molding surface connector provided by the present invention is a method of manufacturing a molding surface connector made of synthetic resin. and a plurality of engaging elements, which are erected on the upper surface of the base material portion, the most important feature of the manufacturing method of the forming surface connector is that the manufacturing method of the forming surface connector includes: using a forming device, the The molding device has a mold wheel having a plurality of cavities formed on the outer peripheral surface with shapes corresponding to the engaging elements, and the cavities have a shape that cannot be held by the engaging elements formed in the cavities. The shape of the undercut (Japanese: Ander Katto shape) is molded in such a way that the shape does not change, and the cavity surface of the mold cavity is equipped with a button that can fix the engaging element when the engaging element is pulled out. A part of the edge portion that is locally pressed and compressed; the molten synthetic resin material is continuously extruded toward the outer peripheral surface of the die wheel to shape the base material portion on the outer peripheral surface of the die wheel, and The engaging element is formed in the die cavity of the die wheel, the engaging element has: a stem portion which rises from the base portion; and at least one hook portion which extends from the stem The upper end of the part protrudes along the crossing direction intersecting with the machine direction; The hook portion is pressed and compressed, and the edge portion is used to wipe the hook portion from below the hook portion, thereby partially forming a compression surface on the lower surface of the hook portion.

Preferably, such a manufacturing method of the present invention includes: using a pick-up roller that is arranged on the downstream side of the forming device and has a pair of rollers, an upper nip roller and a lower nip roller; peeling the forming face connector from the die wheel; and after peeling the forming face connector from the die wheel, pressing the engaging member with the upper pinch roller so that the The hook part is plastically deformed obliquely upward when pulled out from the cavity.

Also, it is preferable that the manufacturing method of the present invention includes forming the upper surface of the hook portion higher than the upper surface of the stem portion by means of a step.

In addition, another aspect of the method of manufacturing a molding surface connector provided by the present invention is a method of manufacturing a molding surface connector made of synthetic resin. Longitudinally formed; and a plurality of engaging elements, which are erected on the upper surface of the base material part, the manufacturing method of the forming surface connector includes: a forming process, in the forming process, the forming a primary molded body of a base material portion and a plurality of temporary elements erected on the base material portion; and a secondary molding process in which the temporary elements of the primary molded body are molded heating and crushing the temporary element from above to form the forming surface connector with the engaging elements, the method of manufacturing the forming surface connector is characterized in that the forming surface connector The manufacturing method includes: using a forming device in the primary forming process, the forming device having a die wheel having a plurality of cavities formed on the outer peripheral surface having a shape corresponding to the temporary element, the cavities having The temporary element formed in the mold cavity cannot be molded in an undercut shape without maintaining its shape, and the mold cavity surface of the mold cavity is equipped with a A part of the temporary member is partially pressed and compressed at the edge portion; the molten synthetic resin material is continuously extruded toward the outer peripheral surface of the die wheel to face the base portion on the outer peripheral surface of the die wheel forming and forming the temporary element within the mold cavity of the mold wheel, the temporary element having: a primary stem portion rising from the substrate portion; and at least 1 primary hook portion , which protrudes from the upper end portion of the primary rod portion in a direction intersecting with the machine direction; and the temporary element is forcibly pulled out from the cavity from the primary The underside of the hook portion presses and compresses the primary hook portion, and uses the edge portion to wipe the primary hook portion from below the primary hook portion, thereby locally forming compression on the lower surface of the primary hook portion noodle.

Preferably, such a manufacturing method of the present invention includes: in the primary forming step, using a roller that is disposed on the downstream side of the forming device and has a pair of upper and lower pinch rolls. picking up rollers to peel the formed primary form from the die wheel; and after the primary form has been peeled off from the die wheel, press the temporary element, thereby plastically deforming the primary hook portion which is pulled out from the cavity and faces obliquely upward.

Furthermore, preferably, the manufacturing method of the present invention includes: in the primary forming process, forming the upper surface of the primary hook part higher than the upper surface of the primary rod part by means of a step; In the secondary forming process, the upper surface of the hook portion and the upper surface of the rod portion in the engaging element are formed into a single flat surface by crushing the upper end portion of the temporary element from above.

Next, the forming device provided by the present invention is a forming device used for forming a forming surface joint or forming a primary formed body of a forming surface joint, and has: a die wheel, which is driven to rotate in one direction; and an extrusion nozzle, which The molten synthetic resin material is extruded toward the die wheel. The most important feature of the molding device is that an engaging element with a connecting piece with the molding surface is provided on the outer peripheral surface of the die wheel or the primary A plurality of cavities of the shape corresponding to the temporary elements of the shaped body, said cavities having said engaging elements formed in said cavities or said temporary elements being unable to act in such a way as to keep their shape The die has an inverted shape, the die wheel has a plurality of disc-shaped metal plates stacked along the axial direction, and each metal plate has a first stacked surface and a second stacked surface perpendicular to the axial direction, and the metal plates have The second lamination surface is arranged on the opposite side of the first lamination surface, and the metal plate has: a plurality of first plates, and hooks for the engaging elements are recessed on the first lamination surface. or the first mold cavity for forming the primary hook portion of the primary forming body; and a plurality of second plates, which are recessed on the second lamination surface for the rod portion of the engaging element or the primary forming A second cavity for molding the primary rod portion of the body, the first plate and the second plate are stacked adjacent to each other in a direction in which the first cavity and the second cavity communicate, and the The first cavity is recessed to form the undercut shape at a position separated from the outer peripheral end surface of the first plate, and the second cavity is continuously radially inward from the outer peripheral end surface of the second plate. concave set.

In the molding apparatus according to the present invention, it is preferable that the radially innermost position of the first cavity is located radially inward of the radially innermost position of the second cavity, A step formed by the second lamination surface of the second plate is formed between the first cavity and the second cavity.

In addition, in the molding device of the present invention, preferably, the first cavity is hemispherically recessed on the first lamination surface of the first plate, and the radius of the hemisphere of the first cavity is It is set to 0.01 mm or more and 0.5 mm or less.

Furthermore, the second cavity has a shape in which the size of the second plate in the circumferential direction gradually decreases from the outer peripheral end surface of the second plate toward the radially inner side, and the radially inner distal end surface of the second cavity It has a spherical surface having a curvature radius of not less than 0.01 mm and not more than 0.5 mm.

The effect of the invention

The molding surface connector of the present invention has: a flat base portion extending along a first direction and a second direction, and is elongated in the first direction compared with the second direction; and a plurality of engaging elements , which is erected on the upper surface of the base part. In addition, each engaging element has: a stem portion standing up from the base portion; and at least one hook portion protruding from the upper end portion of the stem portion in the second direction.

Furthermore, the hook portion has a tapered shape in which the dimension in the first direction gradually decreases toward the hook tip of the hook portion. The lower surface of the hook partially has a compressed surface formed smoother than the upper surface of the hook by being pressed and compressed from the cavity surface (in particular, the edge portion of the cavity surface) of the molding die in the molding process. In particular, it is considered that the compression surface of the lower surface of the hook is formed harder than the upper surface of the hook due to being pressed and compressed when it is ejected from the molding die.

Here, the first direction in the present invention refers to a direction along the machine direction (M direction or MD) in which the molding surface fastener or the primary molded body flows in the manufacturing process (molding process) of the molding surface fastener. In addition, the fact that the base portion is lengthwise in the first direction means that the base portion is formed lengthwise along the machine direction in the molding step. In other words, sometimes the forming surface connecting material is processed by cutting after the forming surface connecting material is formed in the forming process, but in this case, the base material portion of the forming surface connecting material after cutting may also be formed on the first surface of the forming surface connecting material. The direction (machine direction) is not lengthwise. The second direction in the present invention refers to the cross direction (C direction or CD) perpendicular to the machine direction (MD), and refers to the width direction of the base portion formed lengthwise.

The above-mentioned compression surface is partially formed on the lower surface, and the engaging element of the present invention includes a rod portion and a hook portion having a tapered shape, which has a new form different from the conventional J-shape, palm tree shape, and mushroom shape. . In the molded surface connector of the present invention having such an engaging element, it is easy to form the columnar stem part thickly. Therefore, even if the female surface connector is strongly pressed against the molding surface connector of the present invention to receive a large pressing force, the rod portion is hard to bend, and the shape of the engaging element can be stably maintained. In addition, since the rod portion can easily secure a large strength, it is possible to increase the shear strength with respect to the female profile connector.

Also, in this case, it is possible to deeply press the molded surface connector of the present invention into the female profiled surface connector. Thereby, each engaging element of the molded surface connector can be deeply inserted into the vicinity of the base of the ring of the female surface connector, and the ring and the engaging elements can be reliably engaged.

Moreover, in this invention, the top surface (upper surface) of an engaging element is formed so that the upper surface of a rod part may expose upward largely. Therefore, when the molding surface connector of the present invention is touched from the upper surface side serving as the engaging surface, the upper surface of the rod portion is likely to come into contact with the skin widely. In addition, since the hook portion is formed smaller than the rod portion, it is possible to reduce the influence (uncomfortable feeling) of the hook portion on the touch when the engaging element is touched. Therefore, the molding surface fastener of the present invention can stably obtain a better skin feel and contact comfort than conventional molding surface fasteners having, for example, J-shaped or palm tree-shaped engaging elements.

Moreover, in the engaging element of the present invention, the hook portion protrudes from the rod portion toward the second direction as described above, and the lower surface of the hook portion is partially formed with a smoother and harder surface than the upper surface of the hook portion. Compression side. In addition, in this hook portion, the hook tip portion is formed into a thin shape. In addition, the so-called thin head shape in the present invention refers to a shape formed in such a way that both side edges of the hook portion gradually approach toward the top end of the hook in plan view, that is, the dimension of the first direction in the hook portion is toward the top end of the hook. Tapered shape. Therefore, when the ring of the female surface connector is engaged with the forming surface connector of the present invention, the engaging element of the present invention can be smoothly inserted between the rings of the female surface connector, and the ring hook can be Hang on the hook of the engaging element to make the two engage stably.

Furthermore, the engaging element of the present invention can make it difficult for the ring hooked to the hook to be detached from the engaging element, compared with a conventional molded surface fastener having, for example, a mushroom-shaped engaging element. Thus, the profiled surface fastener of the present invention can have a higher peel strength relative to the female profiled surface fastener.

That is, the molding surface connector of the present invention has a form that has not been found in the past, and becomes a new type of molding surface connector that has the following advantages at the same time: the stem portion is difficult to bend, and the advantages of obtaining a good skin feel; The female profile connector has the advantage of a higher peel strength. Therefore, the molding surface fastener of the present invention is provided as an addition to the conventional molding surface fastener, and variations of the molding surface fastener can be increased. As a result, it becomes easier to deal with various types of female profile connectors (nonwoven fabrics) more accurately.

In such a molded surface fastener according to the present invention, the upper surface of the hook portion of each engaging element is arranged to be higher than the upper surface of the rod portion via a step. In addition, the hook has a shape in which the upper surface (upper outer surface) of the hook is convex and the lower surface (lower outer surface) of the hook is non-convex when viewing the engaging element from the first direction (MD).

Here, the convex upper surface of the hook means that, when the hook is viewed from the first direction (MD), the upper surface of the hook, which is inclined downward from the base end of the shaft side toward the top end of the hook, has A continuous curved line-shaped part that rises upwards and curves in a convex shape. In addition, the lower surface of the hook is non-convex means that the hook lower surface (except the lower surface of the hook base end and the hook tip end) that slopes upward from the hook base end toward the hook tip end in the hook portion When the hook is viewed from the first direction (MD), it is formed by at least one of the following parts: it does not have a part that is convexly curved in a downwardly bulging manner, but is a linear part that is straightly inclined; The curved line-shaped part that the inside is slightly sunken.

In the engaging element having such a shape, the upper surface of the hook is convex, so that the influence of the hook on the contact comfort when touching the engaging element is smaller, and the shape of the forming surface connector can be improved. Skin feels better. In addition, since the lower surface of the hook portion is formed in a non-convex shape, the hook portion of the engaging element can easily catch the loop, and the loop can be more stably engaged with the hook portion. Moreover, the upper surface of the hook portion is formed higher than the upper surface of the stem portion by means of a step, so that the ring engaged to the engaging member is easily hooked on the step between the hook portion and the stem portion, and therefore, it is possible to make it difficult for the ring to be caught from the hook portion. The coupling element is disengaged. As a result, the molded surface fastener of the present invention can have higher peel strength than the female molded surface fastener.

In addition, in the molded surface connector of the present invention, the upper surface of the hook portion may not be arranged higher than the upper surface of the stem portion, and a part of the upper surface of the hook portion may be continuously formed from the upper surface of the stem portion. In addition, in this case, the hook portion also has the following shape: when viewing the engaging element from the first direction (MD), the upper surface (upper outer surface) of the hook portion is convex, and the lower surface (lower outer surface) of the hook portion is convex. It is non-convex.

In the engaging element having such a shape, the upper surface of the hook portion disposed at the highest position is continuously formed from the upper surface of the rod portion, so that the hook can be comfortably touched when it touches the engaging element. The influence of is smaller, therefore, can make the skin touch of forming surface connector more favorable. In addition, since the lower surface of the hook portion is formed in a non-convex shape, the hook portion of the engaging element can easily catch the loop as described above, and the loop can be more stably engaged with the hook portion.

In the case of the engaging elements of the above two forms, the outer surface (upper surface) of the upper end portion of the rod portion is formed into a spherical surface. As a result, the contact comfort of the engaging element can be effectively improved.

Furthermore, in the molded surface connector of the present invention, the upper surface of the hook portion and the upper surface of the stem portion of the engaging element may be formed as a single flat surface, and the tip end portion of the hook portion may be arranged inclined downward. Since the upper surface of the hook portion and the upper surface of the rod portion are formed as a single flat surface, it is possible to improve the comfort when touching the engaging element. In addition, since the top end of the hook is inclined downward, the hook of the engaging element can easily catch the loop, and the loop hooked on the hook can hardly be detached from the engaging element.

In this case, the engaging element has a pair of reinforcing ribs arranged on both sides of the hook in the first direction (MD) and connecting the upper end of the hook and the rod. Thereby, the strength of a hook part can be improved effectively. As a result, the peel strength of the molded surface fastener with respect to the female molded surface fastener can be increased.

In the molded surface connector of the present invention, when the hook portion of the engaging element is viewed from the second direction (CD), the hook portion is formed to be asymmetrical in the width direction of the hook portion (that is, the first direction (MD)). . That is, with the center position in the width direction of the hook part as a reference, the part arranged from the center position to one side in the first direction and the part arranged from the center position to the other side in the first direction have different shape. The engaging element having the hook portion of such a unique shape can locally and stably set the above-mentioned compression surface on the lower surface of the hook portion, and has a new form different from conventional ones, so it can be used for various Spinning expands the range of options for male surface connectors.

On the other hand, another aspect of the molding surface connector of the present invention has: a flat base portion that extends along the first direction and the second direction, and is longer than the second direction in the first direction. long; and a plurality of engaging elements erected on the upper surface of the base portion. In addition, each engaging element has: a stem portion standing up from the base portion; and at least one hook portion protruding from the upper end portion of the stem portion in the second direction. Furthermore, the hook portion has a tapered shape in which the dimension in the first direction gradually decreases toward the hook tip of the hook portion. In addition, when the hook portion of the engaging element is viewed from the second direction (CD), the hook portion is formed asymmetrically in the width direction of the hook portion (that is, the first direction (MD)).

The engaging element of the present invention having such a uniquely shaped hook portion becomes a molded surface fastener having a characteristic form that has not been found in the past. Therefore, the molding surface fastener of the present invention is provided as an addition to the conventional molding surface fastener, and variations of the molding surface fastener can be increased. As a result, the range of selection of the male surface fastener with respect to various types of female surface fasteners (nonwoven fabrics) can be expanded. Furthermore, since the hook portion of the engaging element has the above-mentioned characteristic shape, the lower surface of the hook portion can partially have a compression surface formed smoother than the upper surface of the hook portion. In addition, the hook portion is formed in a tapered shape that tapers toward the tip of the hook. As a result, the molded surface fastener of the present invention can simultaneously have the advantages of being difficult to bend at the stem and having a good touch on the skin, and having a higher peel strength than the female surface fastener.

Furthermore, in the molding surface connector of the present invention, when the hook portion is formed asymmetrically in the width direction (first direction), one end portion (rear end portion) of the compression surface of the hook portion in the first direction is arranged at a position higher than the other end (tip end) of the compression surface in the first direction. When the engaging element is viewed from above, the tip end of the hook is disposed at a position deviated toward one end side (rear side) in the first direction from the center position of the rod in the first direction. Since the hook portion is thus formed into a twisted shape, in the engaging element of the present invention, the above-mentioned compression surface can be more stably provided on the lower surface of the hook portion.

In addition, in this case, when viewing the hook from the first direction (MD), the radius of curvature at the tip of the hook is set within a range of not less than 0.06 mm and not more than 0.18 mm, preferably set at Within the range of 0.12 mm or more and 0.15 mm or less. By forming the hook portion so that the tip portion has such a radius of curvature, the loop of the female profile connector can be easily hooked on the hook portion of the engaging element.

Furthermore, in the molding surface fastener of the present invention, one hook portion is arranged for one rod portion. In this case, the rod portion has a hook arrangement surface that rises from the base portion and is arranged toward the protruding direction of the hook portion. Furthermore, the hook arrangement surface has a single flat surface formed from below the hook portion toward the base portion. The flat surface is formed to be perpendicular to the upper surface of the base portion and to be perpendicular to the second direction (CD). And the hook part is arrange|positioned so that it may protrude from this flat surface along a 2nd direction.

Since the engaging member has a shape as described above, the rod portion can stably have a predetermined shape. In addition, even if the female profile connector is pulled in a direction opposite to the protruding direction of the hook portion, the rod portion can stably maintain the engaged state of the ring and the engaging element. Therefore, peel strength can be increased.

In this case, when the engagement element is viewed from the first direction (MD), the rod portion has a rod back surface arranged on the opposite side of the hook arrangement surface in the second direction. The rod back has a shape in which the dimension between the hook arrangement surface in the rod part and the rod back gradually decreases as the distance from the upper surface of the base part increases. Thereby, the strength of a pole part can be ensured stably. In particular, even if the female profile connector is pulled in the direction opposite to the protruding direction of the hook in the second direction (CD) in the state where the ring is engaged with the engaging element, the rod will Since it is hard to bend (it is hard to fall down), it is possible to increase the shear strength with respect to the female profile connector.

In addition, in this case, when the engaging element is viewed from the first direction, the rear surface of the rod has an upper curved surface portion disposed convexly on the upper end portion of the rod portion and a lower end portion disposed concavely on the rod portion. The lower side of the curved face. As a result, the molded surface connector can have a good touch on the skin, and the strength of the stem portion can be improved.

Furthermore, when the engaging element is viewed from the first direction (MD), the hook has a shape in which the upper surface of the hook has a convex shape with a radius of curvature smaller than that of the upper curved surface of the stem. Thereby, it is possible to easily hang the hook of the female surface connector on the engaging element while maintaining a good skin feel of the molding surface connector.

In particular, in the molding surface connector of the present invention, the maximum dimension of the stem in the second direction (CD) is set to be 0.1 mm to 1.5 mm, preferably 0.2 mm to 1.0 mm. In addition, the maximum protrusion dimension of the hook portion protruding from the rod portion in the second direction is set to be 0.01 mm to 0.5 mm, preferably 0.05 mm to 0.1 mm. As long as it is a molded surface fastener formed with such engaging elements having such a size, the strength of each engaging element and the peeling strength with respect to the female surface fastener can be effectively increased.

Next, in the manufacturing method of the present invention for manufacturing the above-mentioned forming surface connector, a forming device is used in the forming process of the forming surface connector. Die wheels for mold cavities (also known as cavity spaces). Especially in the present invention, the mold cavity formed at the mold wheel has an undercut shape, and the cavity surface of the mold cavity of the mold wheel is equipped with a part (hook) that can engage the engaging element when the engaging element is pulled out. Part) The edge part that is pressed and compressed locally.

Here, the mold cavity has an undercut shape means that, when viewing a cross section perpendicular to the machine direction (MD) of the mold wheel (circumferential direction of the mold wheel), the mold cavity is smaller than the cross direction (CD) (with the mold wheel) The direction parallel to the axial direction) has the smallest minimum orthogonal dimension part, and the position on the inner side of the drawing direction (radial direction of the die wheel) of the formed body has a cross direction (CD) dimension larger than the least orthogonal dimension part part. Since the mold cavity has such an undercut shape, the engaging element formed in the mold cavity cannot be ejected in such a way that the shape corresponding to the mold cavity remains unchanged. Therefore, by mechanically pulling and forcibly pulling out the engaging element formed in the cavity as described later, a part (hook portion) of the engaging element rubs against the edge portion of the cavity surface, and Compressed locally.

In the production method of the present invention, the melted synthetic resin material is continuously ejected toward the outer peripheral surface of the die wheel provided with the above-mentioned undercut shape. Thus, the base portion is formed on the outer peripheral surface of the die wheel, and in the die cavity of the die wheel, there are rods standing up from the base portion and from the upper end of the rod along the machine direction ( MD) The engaging element of at least one hook protruding in the crossing direction (CD) is molded.

Next, the engaging element hardened in the cavity of the die wheel is forcibly pulled out from the cavity by pulling the base material portion or the like formed on the outer peripheral surface of the die wheel. At this time, the hook portion of the engaging element is pressed and compressed from below the hook portion by using the edge portion provided to the mold cavity, and the edge portion wipes the hook portion of the engaging element from below the hook portion, so that the hook portion The lower surface of the hook locally forms a smoother compression surface than the upper surface of the hook. Thus, it is possible to efficiently and stably manufacture the forming surface fastener of the present invention having an engaging element formed on the lower surface of the hook with a compression surface smoother than the upper surface of the hook, or having the hook formed on the surface of the hook. A profiled surface connector according to the invention of an asymmetrical snap-in element in the width direction (MD) of the hook.

In such a manufacturing method of the present invention, when forcibly pulling out the engaging element from the cavity of the die wheel, a pick-up roller arranged on the downstream side of the molding device is used. In this case, the pick-up roller has a pair of upper and lower rollers, an upper nip roller and a lower nip roller, and is connected by sandwiching the forming surface from the downstream side with the upper nip roller and the lower nip roller that are reversed to each other. pieces, so as to pull the snap elements formed in the mold cavity. As a result, the aforementioned compressive surface is partially formed on the lower surface of the hook portion of the engaging element. In addition, at this time, since the hook part is partially pressed and compressed, it may incline upward so as to incline upward with respect to the rod part.

In addition, the engaging element pulled out from the cavity of the die wheel passes between the upper and lower pair of rollers, the upper nip roller and the lower nip roller, so that the pressing force by the upper nip roller can also be utilized. On the other hand, the hook portion facing obliquely upward with respect to the rod portion is deformed so as to bend downward. Thereby, the molding surface fastener of this invention can be manufactured more stably.

Furthermore, in the manufacturing method of the present invention, by forming the cavity of the die wheel into a predetermined shape, it is possible to form the engaging member in which the upper surface of the hook portion is formed higher than the upper surface of the stem portion by a step. Accordingly, it is possible to efficiently manufacture a molded surface fastener having a higher peel strength than a female surface fastener.

Next, another method of manufacturing a molded surface connector according to the present invention includes: a primary molding process, in which a primary molded body having a base material part and a plurality of temporary elements erected on the base material part is formed. and a secondary forming process in which the temporary element of the primary forming body is heated, and the temporary element is crushed from above to form the forming surface connector of the present invention with the engaging element .

In particular, in the primary molding process of the present invention, a molding device having a die wheel having a plurality of cavities having a shape corresponding to the temporary element of the primary molded body formed on the outer peripheral surface is used. In this case, the mold cavity formed on the mold wheel has an undercut shape, and a part of the temporary element (primary hook) that can be fixed to a part of the temporary element (primary hook) when the temporary element is pulled out is arranged on the cavity surface of the mold wheel. Press and compress the edges.

The melted synthetic resin material is continuously extruded toward the outer peripheral surface of the die wheel provided with such an undercut shape. Thereby, the base portion is formed on the outer peripheral surface of the die wheel, and the primary stem portion standing up from the base portion and the upper end portion of the primary stem portion along the crossing direction are formed in the cavity of the die wheel. (CD) The protruding at least 1 temporary element of the primary hook is shaped.

Next, the temporary element molded and cured in the cavity of the die wheel is forcibly pulled out from the cavity by pulling the base material formed on the outer peripheral surface of the die wheel or the like. At this time, the primary hook portion of the temporary element is pressed and compressed from below the primary hook portion by using the edge portion set to the mold cavity, and the edge portion wipes the primary hook portion of the temporary element from below the primary hook portion. The lower surface of the hook partially forms a compression surface that is smoother than the upper surface of the primary hook. Thus, it is possible to form a primary molded body having a temporary element having a compression surface smoother than the upper surface of the primary hook on the lower surface of the primary hook, or to have the primary hook formed in the width direction of the primary hook ( The primary forming of the asymmetrical temporary element in MD) is efficiently and stably formed.

In addition, in the secondary molding process of the present invention, the temporary element is deformed by flattening at least a part of the temporary element and the upper end of the rod portion of the primary molded body from above to flatten it. Thus, it is also possible to efficiently and stably manufacture the forming surface fastener of the present invention having an engaging element formed with a compression surface smoother than the upper surface of the hook on the lower surface of the hook, or having the hook formed as The inventive profiled surface connector of the asymmetrical snap-in elements in the width direction (MD) of the hook.

In such a manufacturing method of the present invention, when the temporary member is forcibly pulled out from the cavity of the die wheel in the primary molding process, the upper side nip roll and the The lower nip roll is the pick-up roll for the upper and lower pair of rolls. In this case, the temporary member molded in the cavity is pulled by pinching the primary molded body from the downstream side by upper and lower pinch rolls that are reversed to each other. Thereby, the above-mentioned compression surface is partially formed on the lower surface of the primary hook portion of the temporary element. In addition, at this time, the primary hook portion is partially pressed and compressed, so the primary hook portion may incline upward relative to the primary rod portion.

In addition, the temporary element extracted from the cavity of the mold wheel passes between the upper and lower pair of rollers, the upper nip roller and the lower nip roller, so that it can also be pressed by the upper nip roller. The primary hook portion facing obliquely upward with respect to the primary rod portion is deformed so as to bend downward. Thereby, the above-mentioned primary molded body can be produced more stably.

Moreover, in the manufacturing method of the present invention, in the primary molding process, by forming the cavity of the die wheel into a predetermined shape, the upper surface of the primary hook portion can also be formed to be larger than the upper surface of the primary rod portion by means of steps. Tall temporary elements are formed. Then, in the secondary molding process, by crushing the upper end of the temporary element from above, the upper surface of the hook portion and the upper surface of the rod portion in the engaging element can be formed into a single flat surface, and the The top end of the hook is inclined downward. Accordingly, it is possible to efficiently manufacture a molded surface fastener in which the engaging elements are comfortable to touch and in which the loops hooked on the hooks are difficult to come off from the engaging elements.

Next, the molding device of the present invention is a molding device used for molding a surface connector or a primary molded body of a molding surface connector, and has: a die wheel that is driven to rotate in one direction; and an extrusion nozzle that The molten synthetic resin material is extruded toward the die wheel. In addition, a plurality of mold cavities having shapes corresponding to the engaging elements of the forming surface connector or the temporary elements of the primary molded body are provided on the outer peripheral surface of the mold wheel. The cavity surface of the cavity is provided with an edge portion capable of locally pressing and compressing a part of the engaging element or the temporary element when the engaging element or the temporary element is pulled out.

In addition, the die wheel of the present invention has a plurality of disc-shaped metal plates stacked along the axial direction, and each metal plate has a first stacking surface perpendicular to the axial direction and a metal plate disposed on the opposite side of the first stacking surface. Layer 2 overlay. In this case, as the metal plate of the mold wheel, a first plate having a first cavity for molding the hook portion of the engaging element or the primary hook portion of the primary molded body is recessed on the first lamination surface and the first plate on the first lamination surface is used. The second plate of the second cavity for forming the stem portion of the engaging element or the primary stem portion of the primary molded body is concavely provided on the 2-stacking surface.

The first plate and the second plate are stacked adjacent to each other in such a direction that the first cavity of the first plate communicates with the second cavity of the second plate to form a mold wheel. The first cavity of the first plate is recessed at a position separated from the outer peripheral end surface of the first plate, and the second cavity is continuously recessed radially inward from the outer peripheral end surface of the second plate. In particular, the first cavity of the first plate is formed in a size that forms an undercut shape with respect to the second cavity when the first plate and the second plate are sequentially laminated.

In such a molding apparatus of the present invention, it is possible to form a die wheel provided with an undercut shape and an edge portion as described above. In addition, by using the molding apparatus of the present invention, it is possible to stably mold the above-mentioned molding surface fastener of the present invention and a primary molded body to be the molding surface fastener of the present invention.

In such a molding device of the present invention, the radially innermost position in the first cavity of the first plate is located radially inward than the radially innermost position in the second cavity of the second plate. . In addition, a step formed by the second lamination surface of the second plate is formed between the first cavity and the second cavity.

By using such a forming device, it is possible to form the upper surface of the hook portion higher than the upper surface of the rod portion by means of a step, or to form the upper surface of the primary hook portion higher than the upper surface of the rod portion by means of a step. Tall temporary elements are formed stably.

Furthermore, in the forming apparatus of the present invention, the first cavity of the first plate is recessed in the first lamination surface of the first plate in a hemispherical shape. In this case, the radius of the hemispherical shape of the first cavity is set to be not less than 0.01 mm and not more than 0.5 mm, preferably not less than 0.05 mm and not more than 0.1 mm. In addition, the second cavity of the second plate has a shape in which the dimension of the second plate in the circumferential direction gradually decreases from the outer peripheral end surface of the second plate toward the radially inner side. In this case, the radially inner tip surface of the second cavity has a spherical surface having a curvature radius of 0.01 mm to 0.5 mm, preferably 0.05 mm to 0.1 mm.

By forming the first cavity of the first plate and the second cavity of the second plate as described above, it is possible to stably mold a molding surface connector having an engaging element having the above-mentioned compression surface formed on the lower surface of the hook portion, Alternatively, it is a primary molded body having a temporary element in which the above-mentioned compression surface is formed on the lower surface of the primary hook.

Description of drawings

Fig. 1 is a perspective view showing a molding surface connector according to Embodiment 1 of the present invention.

Fig. 2 is a perspective view showing only the engaging elements of the molding surface connector.

Fig. 3 is a front view of the engaging element viewed from one side (front side) in the machine direction (MD).

Fig. 4 is a side view of the engaging element viewed from one side (right side) in the cross direction (CD).

Fig. 5 is a side view of the engaging element viewed from the other side (left side) in the cross direction (CD).

Fig. 6 is a plan view of the engaging element viewed from the upper side.

Fig. 7 is an enlarged view of main parts showing a hook portion of an engaging element in an enlarged manner.

FIG. 8 is a schematic view schematically showing a manufacturing apparatus for manufacturing the molded surface fastener of Example 1. FIG.

FIG. 9 is a schematic view schematically showing the form of a die wheel of the manufacturing apparatus.

Fig. 10 is a sectional view showing a section perpendicular to the circumferential direction of the outer peripheral surface of the die wheel.

Fig. 11 is a cross-sectional view schematically showing a state in which an engaging element formed by the outer peripheral surface of the die wheel is pulled out.

Fig. 12 is a perspective view showing a molding surface connector according to a modified example of the first embodiment.

Fig. 13 is a perspective view showing a molding surface connector according to Embodiment 2 of the present invention.

Fig. 14 is a perspective view showing only the engaging elements of the molding surface connector.

Fig. 15 is a front view of the engaging element viewed from one side (front side) in the machine direction (MD).

Fig. 16 is a side view of the engaging element viewed from one side (right side) in the cross direction (CD).

Fig. 17 is a side view of the engaging element viewed from the other side (left side) in the cross direction (CD).

Fig. 18 is a perspective view showing a molding surface connector according to Embodiment 3 of the present invention.

Fig. 19 is a perspective view showing only the engaging elements of the molding surface connector.

Fig. 20 is a front view of the engaging element viewed from one side (front side) in the machine direction (MD).

Fig. 21 is a side view of the engaging element viewed from one side (right side) in the cross direction (CD).

Fig. 22 is a side view of the engagement member viewed from the other side (left side) in the cross direction (CD).

FIG. 23 is a schematic view schematically showing a manufacturing apparatus for manufacturing the molded surface fastener of Example 3. FIG.

FIG. 24 is a perspective view showing only an engaging element in a modified example of Embodiment 1. FIG.

Fig. 25 is a front view of an engaging element according to another modification of Example 1 viewed from one side (front side) in the machine direction (MD).

Detailed ways

Hereinafter, preferred embodiments of the present invention will be described in detail while giving examples and referring to the drawings. In addition, this invention is not limited at all by embodiment demonstrated below, As long as it has the structure substantially the same as this invention, and has the same operation effect, various changes are possible. For example, in each of the following embodiments, the number, arrangement, and formation density of the engaging elements vertically provided on the base portion of the molding surface connector are not particularly limited, and can be changed arbitrarily.

Example 1

Fig. 1 is a perspective view showing a molding surface connector of the first embodiment. Fig. 2 is a perspective view showing only the engaging elements of the molding surface connector. 3 to 6 are a front view, a right side view, a left side view and a plan view of the engaging element, respectively. Moreover, FIG. 7 is an enlarged view showing a main part of a hook portion of an engaging element.

In addition, in the following description, the front-back direction of the forming surface connector and the primary molded body refers to the lengthwise direction of the forming surface connector and the primary molded body that are formed lengthwise as described later. The direction of the machine direction (M direction or MD) in which the connecting piece or the primary forming body flows in the manufacturing process of the connecting piece.

The left-right direction refers to the width direction perpendicular to the longitudinal direction and along the upper surface (or lower surface) of the base material portion of the molding surface connector. In this case, the left-right direction and the width direction can also be said to be an intersecting direction (C direction or CD) perpendicular to the machine direction (MD). The up-down direction (thickness direction) refers to a height direction perpendicular to the longitudinal direction and perpendicular to the upper surface (or lower surface) of the base portion of the molding surface connector.

The molded surface connector 1 of the first embodiment shown in FIG. 1 is manufactured by molding a thermoplastic resin using a manufacturing device 50 including a molding device 51 described later. This molding surface connector 1 is manufactured in the shape of a rectangular sheet long in the machine direction of the manufacturing apparatus 50 in plan view. In addition, in the present invention, the length dimension and width dimension of the forming surface connector 1 are not particularly limited. The size and shape of the molding surface fastener 1 can be arbitrarily changed by, for example, cutting the molding surface fastener 1 manufactured by the manufacturing apparatus 50 . In addition, the molding surface connector 1 may have a shape other than a rectangle in planar view.

The type of synthetic resin forming the molding surface connector 1 is also not particularly limited. As a material of the molding surface connector 1 in the present invention, thermoplastic resins such as polypropylene, polyester, nylon, polybutylene terephthalate, or copolymers thereof can be used. The molding surface connector 1 of the first embodiment is formed of polypropylene.

The molding surface connector 1 of the first embodiment has a thin plate-shaped base portion 10 and a plurality of engaging elements 20 erected on the upper surface of the base portion 10 . The base portion 10 is formed to extend along the machine direction (MD) and the cross direction (CD), and is formed lengthwise along the machine direction. In addition, the base material portion 10 is formed to have a predetermined thickness, and the upper surface and the lower surface of the base material portion 10 are flat and formed parallel to each other.

A plurality of engaging elements 20 are regularly arranged and arranged along the machine direction (MD) and the cross direction (CD). In addition, in the present invention, the arrangement pattern of the engaging elements 20 is not limited. For example, a plurality of engaging elements 20 may also be regularly arranged on the upper surface of the base portion 10 in other configuration patterns such as zigzag, or may be randomly arranged on the upper surface of the base portion 10 .

Each engaging element 20 of the present embodiment 1 has respectively: a rod portion 21 standing up from the base material portion 10; and a hook portion 31 extending from the upper end of the rod portion 21 to The right side stands out. In the case of the first embodiment, all the hook portions 31 of the engaging elements 20 protrude from the rod portion 21 in the same direction (right side) in the intersecting direction.

The rod portion 21 of the engaging element 20 stands upright on the upper surface of the base portion 10 . The rod portion 21 has a base end portion 22 standing up from the base portion 10 and having a curved surface on the entire outer peripheral portion, and a rod main body portion 23 continuously disposed on the base end portion 22 . In addition, the rod portion 21 of the first embodiment may be formed without providing the base end portion 22 of the curved surface.

The rod portion 21 has a symmetrical shape in the machine direction (the width direction of the rod portion 21 ) with reference to the center position in the machine direction (MD). In order to increase the strength of the rod part 21 relative to the base part 10 , the base end part 22 of the rod part 21 is formed such that the cross-sectional area perpendicular to the vertical direction increases gradually as it approaches the base part 10 .

The cross section of the rod main body part 23 of the rod part 21 perpendicular to the vertical direction has a shape close to a semicircle or a shape larger than a semicircle surrounded by arcs and chords of a circle. In addition, the rod main body portion 23 has a form in which the area of the cross section perpendicular to the vertical direction increases gradually as it approaches the base material portion 10 . Furthermore, the outer surface (tip end surface) of the upper end portion of the rod main body portion 23 is formed in a spherical shape.

In this case, the rod upper end (rod tip) disposed at the highest position of the rod portion 21 is disposed at the center position of the rod portion 21 in the machine direction in the machine direction (MD). In addition, the rod upper end is disposed between the center position of the rod portion 21 in the cross direction and the position of the hook arrangement surface 24 described later in the cross direction (CD).

The rod body part 23 of the rod part 21 has a flat hook arrangement surface 24 on which the hook part 31 is disposed, and a rod outer peripheral surface having an arcuate shape in a cross section perpendicular to the vertical direction. The hook arrangement surface 24 is formed from below the hook portion 31 toward the base portion 10 . In addition, the hook disposing surface 24 is formed of a single flat surface that is perpendicular to the upper surface of the base portion 10 and perpendicular to CD.

In addition, in the engaging element 20 of the first embodiment, the above-mentioned base end portion 22 is arranged between the hook arrangement surface 24 of the rod portion 21 and the base portion 10 . However, in the present invention, the hook arrangement surface 24 of the rod portion 21 may be formed up to the lower end position of the rod portion 21 so as to stand up from the base material portion 10 .

In addition, when observing the front view of the engaging element 20 of the present embodiment 1 from the front side (or rear side) in the M direction, as shown in FIG. 25 on the back of the rod on the side. The lever back surface 25 is formed such that the dimension in the direction C between the hook arrangement surface 24 and the lever back surface 25 gradually decreases as it moves away from the upper surface of the base member 10 when the engaging element 20 is viewed from the front. In this case, the rod back surface 25 has, when viewed from the front of the engaging element 20, an upper curved surface 25a that is convexly (or arcuately) disposed on the upper end of the rod 21; and a lower curved surface 25b. , which is adjacent to the base portion 10 and arranged in a concave shape at the lower end portion of the rod portion 21; and an inclined surface 25c, which is arranged between the upper curved surface 25a and the lower curved surface 25b.

Moreover, when the engaging element 20 of the present embodiment 1 is viewed from the side, as shown in FIG. The upper surface is formed in a decreasing manner. In this case, the rod portion 21 has, when viewed from the side of the engaging element 20, an upper curved surface portion 25a arranged in an arc shape at the upper end portion of the rod portion 21; 10 is disposed adjacent to the lower end portion of the rod portion 21 in a concave shape; and the inclined surface portion 25c is disposed between the upper curved portion 25a and the lower curved portion 25b.

The rod portion 21 of the first embodiment can stably have high strength by having the above-mentioned form. Even if, for example, the nonwoven fabric used as the female surface connector is connected toward the forming surface of the first embodiment, When the member 1 is pressed strongly, the rod portion 21 is also difficult to deform such as bending. In particular, since the rod back 25 of the rod 21 is formed as described above, even if the engaging element 20 is subjected to an external force, the rod 21 is difficult to deform so as to fall to the rod rear 25 side (left side) in the cross direction (CD). Thereby, since the hook part 31 can be suppressed from inclining upward by deformation|transformation of the rod part 21, the state which hooked the ring on the hook part 31 can be maintained easily.

The hook portion 31 of the first embodiment has a characteristic form in which the main outer peripheral surface facing upward and sideways is formed in a spherical shape, and is formed smoother than the main outer peripheral surface by being pressed and compressed in a molding process described later. The compression surface 32 is disposed on the lower surface of the hook portion 31 . Here, the term "smooth surface" means that the surface has fewer irregularities, and thus the surface roughness is smaller.

In addition, the lower surface of the hook portion 31 refers to the lower end portion of the outer surface of the hook portion 31 that is disposed from the top end of the hook portion 31 to the hook portion 31 and becomes a connection portion connected to the rod portion 21, and faces downward or A portion arranged obliquely downward (that is, toward the base portion 10 ). In particular, in the case of the first embodiment, the lower surface of the hook portion 31 is disposed below the height position of the tip of the hook portion 31 .

More specifically, the form of the hook portion 31 of the present embodiment 1 is described. The hook portion 31 of the present embodiment 1 has the following form when viewed from the side of the engaging element 20 shown in FIG. It is circular, and the area of the cross-section orthogonal to CD of the hook portion 31 gradually decreases as it gets away from the flat shaft portion 21 of the shaft portion 21 .

In other words, the outer shape of the hook portion 31 has a shape that becomes thinner as it gets farther away from the rod portion 21 . That is, the hook portion 31 is formed such that the dimension in the hook width direction (dimension in the front-rear direction) gradually decreases as the distance from the rod portion 21 increases. In addition, it is preferable that the hook portion 31 is formed such that the dimension in the vertical direction (height direction) of the hook decreases gradually as the distance from the rod portion 21 increases.

The upper surface of the hook portion 31 is formed in a spherical shape (hemispherical shape). Therefore, no matter the shape of the upper edge of the hook portion 31 when viewed from the front as shown in FIG. 3 or the shape of the upper edge of the hook portion 31 when viewed from the side as shown in FIG. Convex continuous arc shape (curved line shape). In this case, the curvature radius at the upper surface of the spherical hook portion 31 is set smaller than the curvature radius at the spherical upper end portion of the rod portion 21 . This makes it easy to penetrate the hook portion 31 of the engaging element 20 into the ring when the ring is engaged with the molding surface fastener 1 of the first embodiment, so that the ring and the engaging element 20 can be smoothly engaged.

In addition, as can be seen in FIG. 4, the width dimension (M direction) of the hook portion 31 is smaller than the width dimension (M direction) of the rod portion 21, and a flat hook arrangement is exposed outside the width direction of the hook portion 31. Face 24. That is, the rod portion 21 extends outward in the width direction from the hook portion 31 . Thereby, when the ring is engaged with the molding surface connector 1 of the first embodiment, the hook portion 31 of the engaging element 20 can easily penetrate into the ring, and the strength of the rod portion 21 can be ensured.

Especially in the present embodiment 1, when the hook portion 31 is viewed from the protruding direction side (right side) (see FIG. 4 ), the curvature radius of the upper surface or upper edge of the hook portion 31 is set to be 0.01 mm or more and is 0.5 mm or less, preferably 0.05 mm or more and 0.1 mm or less. In addition, when the rod portion 21 is viewed from the M direction (see FIG. 3 ), or when the rod portion 21 is viewed from the C direction (see FIG. 4 or FIG. 5 ), the ratio of the radius of curvature at the upper surface or upper edge of the rod portion 21 to The upper surface of the hook portion 31 has a large radius of curvature, and is set to be 0.01 mm to 0.5 mm, preferably 0.05 mm to 0.1 mm.

Moreover, in the first embodiment, when the hook portion 31 is viewed from the M direction (especially when the hook portion 3 is enlarged from the rear side as shown in FIG. 7 ), the tip end portion 33 of the hook portion 31 has a substantially circular Arc shape. In this case, the radius of curvature of the outer surface of the tip portion 33 of the hook portion 31 is set within a range of 0.06 mm to 0.18 mm, preferably 0.12 mm to 0.15 mm.

Moreover, as mentioned above, the lower surface of the hook part 31 has the compression surface 32 formed in concave shape. Therefore, in the front view of the engaging element 20 shown in FIG. 3 , although the upper end edge of the hook portion 31 has a convex arc shape as described above, the lower end edge of the hook portion 31 is slightly curved inward to form a concave shape. Such a non-convex shape. The lower end edge of the hook portion 31 has a concave non-convex shape in this way, so that the ring can be hooked (easier to engage) with the hook portion 31 more easily than, for example, when the lower end edge has a convex shape. Furthermore, it is easy to maintain the engaged state of the rings stably. In addition, in the first embodiment, the lower end edge of the hook portion 31 may have a non-convex shape by being linearly inclined in a front view of the engaging element 20 .

In this case, although the upper surface of the hook portion 31 is formed as a non-compressed surface, it is formed by duplicating the cavity surface (etching surface) of the first cavity 56 described later, so the surface roughness is relatively small. Small smooth surface.

The compression surface 32 arranged on the lower surface of the hook portion 31 is formed by being rubbed while being pressed and compressed to generate plastic deformation (strain) in a molding process described later. Therefore, the compression surface 32 of the hook portion 31 is a non-transfer surface that has not replicated the cavity surface of the first cavity 56 , and is formed to be smoother and brighter than the upper surface of the hook portion 31 . Therefore, the compression surface 32 of the hook portion 31 reflects more light than the other surfaces of the hook portion 31 , and therefore, gloss is locally seen also on the compression surface 32 .

In addition, since the smooth compression surface 32 of the hook portion 31 is formed by being pressed and compressed, it is considered that the hardness is locally greater than that of the upper surface of the hook portion 31 . If the harder compression surface 32 is disposed on the lower surface of the hook portion 31, when the hook portion 31 catches (holds) the ring of the female surface connector, the deformation of the hook portion 31 can be suppressed and the ring and the ring can be stably maintained. The state where the hook portion 31 is engaged.

Moreover, in the engaging element 20 of the first embodiment, although the rod portion 21 has a symmetrical shape in the front-rear direction (width direction of the rod portion 21 ) as described above, the hook portion 31 has a shape symmetrical in the front-rear direction (the hook portion 31 width direction). Asymmetric shape in the width direction).

That is, whether in a side view of the engaging element 20 shown in FIG. 4 or in a plan view of the engaging element 20 shown in FIG. A different form in which the front half arranged in the front and the rear half arranged in the rear are asymmetrical to each other based on the reference.

In particular, since the above-mentioned compression surface 32 is provided on the lower surface of the hook portion 31 of the first embodiment, the lower half of the hook portion 31 has a twisted form. Therefore, the rear end portion of the compression surface 32 in the hook portion 31 is arranged at a higher position (a position away from the base material portion 10) than the front end portion of the compression surface 32, so that, for example, in the card shown in FIG. When the coupling element 20 is viewed from the front, the rear end of the compression surface 32 in the hook portion 31 is hidden and cannot be seen.

In the present embodiment 1, as shown in FIG. 6 , the hook tip end of the flat hook installation surface 24 farthest from the rod 21 among the hooks 31 is arranged at a center position in the front-rear direction (MD) of the hook 31 . Rear position. In this case, the hook distal end portion of the hook portion 31 has a hook distal end surface formed by being sandwiched between the upper surface of the hook portion 31 and the compression surface 32 when the engaging element 20 is viewed from the hook protruding side (right side) in the C direction. 34. The hook tip surface 34 is divided into an upper surface of the hook portion 31 and a compression surface 32 by ridge lines.

In addition, in the engaging element 20 of the first embodiment, as shown in FIGS. 2 to 5 , a step (step portion) 26 is provided between the upper surface of the hook portion 31 and the upper surface of the rod portion 21 . With this step 26, the height position (position in the vertical direction) of the upper surface of the base end portion 22 on the side of the hook portion 31 connected to the rod portion 21 is arranged higher than the upper surface of the rod portion 21, and the hook portion 31 A part is formed to protrude upward with respect to the rod part 21 .

In addition, in this Example 1, the specific size of the engaging element 20 is set as follows.

For example, the maximum height H1 of the engaging element 20 from the upper surface of the base portion 10 is set to be 0.1 mm to 1.5 mm, preferably 0.2 mm to 1.0 mm in the vertical direction. In this case, the maximum height H2 of the rod portion 21 from the upper surface of the base portion 10 is set to be 0.1 mm to 1.5 mm, preferably 0.2 mm to 1.0 mm. In addition, the height dimension H3 of the step 26 formed between the upper surface of the hook portion 31 and the upper surface of the rod portion 21 is set to be 0.01 mm or more and 0.3 mm or less. Moreover, the height dimension H4 in the vertical direction from the upper surface of the base material part 10 at the tip part of the hook part 31 is lower than the height position of the upper end of the rod part 21, and is set to be 0.1 mm or more and 1.5 mm or less, preferably It is set to 0.2 mm or more and 1.0 mm or less.

In the M direction (the width direction of the engaging element 20), the maximum dimension in the M direction of the rod portion 21 (that is, the dimension in the M direction at the base end portion 22 of the rod portion 21) L1 is set to be 0.1 mm or more and is 1.5 mm or less, preferably 0.2 mm or more and 1.0 mm or less. Moreover, the maximum dimension L2 of the M direction of the hook part 31 is set to 0.01 mm or more and 1.0 mm or less, Preferably it is set to 0.05 mm or more and 0.5 mm or less.

In the C direction, the maximum dimension in the C direction of the rod portion 21 (that is, the dimension in the C direction at the base end portion 22 of the rod portion 21) W1 is set to be 0.1 mm or more and 1.5 mm or less, preferably 0.2 mm or less. mm or more and 1.0 mm or less. Furthermore, the maximum dimension W2 of the hook portion 31 in the C direction (that is, the dimension from the tip of the hook portion 31 to the hook placement surface 24 of the rod portion 21 in the C direction) W2 is set to be 0.01 mm or more and 1.0 mm or less, preferably It is set to 0.05 mm or more and 0.5 mm or less.

And the inclination angle of the above-mentioned inclined surface part 25c of the rod part 21 with respect to an up-down direction is set to 5 degrees or more and 20 degrees or less. In addition, as shown in FIG. 3 , it is preferable that the maximum dimension W2 of the above-mentioned C direction of the hook portion 31 is set as the dimension of a line segment parallel to the C direction between the lower end of the hook portion 31 and the hook arrangement surface 24 of the rod portion 21 ( The rod portion 21 is less than half of the C-direction dimension) W3 at the lower end position of the hook portion 31 . In other words, it is preferable to set the dimension W3 to be equal to or greater than twice the maximum dimension W2. By having such a relationship between the dimension W2 and the dimension W3, when the engaging element 20 is molded as described later, it is possible to form the first cavity 56 having the above-mentioned undercut shape spherically formed on the first plate 55a. The hook portion 31 of such a compression surface 32 is deformed while the hook portion 31 is molded. In addition, it is possible to manufacture the molded surface fastener 1 in which the hook portion 31 has a small hook portion and the stem portion 21 has high strength. In this case, as shown in FIG. 4 , the above-mentioned maximum dimension L2 of the hook 31 in the M direction is preferably set to be half or less of the dimension L3 of the stem 21 in the M direction at the lower end position of the hook 31 . In other words, it is preferable that the dimension L3 is set to be equal to or greater than twice the maximum dimension L2. Thereby, the hook part 31 which has the compression surface 32 can be formed, and the strength of the rod part 21 can be ensured suitably.

In addition, in the molding surface connector 1 of the first embodiment, the above-mentioned plurality of engaging elements 20 shown in FIGS. 1 to 6 are erected on the base material portion 10 . However, in the present invention, not all the engaging elements 20 erected on the base portion 10 may have the same shape.

For example, the size of each of the engaging elements 20 in the first embodiment is very small, so it may be difficult to make all the engaging elements 20 have the same shape. In addition, when using a molding device 51 as described later to manufacture the molded surface connector 1, even if the engaging element 20 is molded from a molding cavity of the same shape, there may be problems due to superposition of various factors. A case where the shape of the engaging element 20 (especially the shape of the hook portion 31 ) is different from that of other engaging elements 20 .

Therefore, in the present invention, some of the engaging elements among all the engaging elements erected on the base portion may be engaging elements having the characteristics of the present invention. In this case, the engaging element having the characteristics of the present invention is used in a proportion of 10% or more, preferably 25% or more, particularly preferably 50%, of the number of all engaging elements erected on the base portion. The above ratio can be formed. The same is true for the molding surface connectors 2 and 3 of Examples 2 and 3 described later about the ratio of the engaging elements having the characteristics of the present invention.

Next, a method of manufacturing the molded surface connector 1 of the first embodiment described above using the manufacturing apparatus 50 shown in FIG. 8 will be described.

The manufacturing device 50 of the forming surface connector 1 has: a forming device 51 for forming the forming surface connector 1 (temporary forming surface connector to be described later); 1 is peeled off from the forming device 51, and a part of the engaging element 20 is deformed.

In addition, the forming surface fastener formed by the forming apparatus 51 of FIG. 8 is a forming surface fastener having an engaging element before pressing and compressing the hook portion. Therefore, the shape of the forming surface fastener before being formed by the forming device 51 and peeled off from the die wheel 52 is slightly different from the shape of the forming surface fastener 1 shown in FIG. 1 . In other words, the cavities (namely, the first cavity 56 , the second cavity 57 , and the auxiliary cavity 58 ) of the die wheel 52 , which will be described later, are filled with synthetic resin, and the engagement of the state before the die wheel 52 is peeled off is formed. The shape of the element is slightly different from that of the snap-fit element 20 shown in FIG. 1 . Therefore, the forming surface connector and the engaging elements before being peeled off from the die wheel 52 can also be referred to as temporary forming surface connectors and temporary engaging elements, respectively. In addition, hereinafter, in order to prevent lengthy description and misunderstanding, "temporary forming surface connector" and "temporary engaging element" are also simply referred to as "forming surface connecting element 1" and "engaging element 20".

The molding device 51 shown in FIG. 8 has: a die wheel 52 that is driven to rotate in one direction (in the drawing, counterclockwise); and an extrusion nozzle 53 that is disposed opposite to the peripheral surface of the die wheel 52 and that The melted synthetic resin material is continuously extruded.

In order to mold the engaging element 20 of the molding surface connector 1 , a plurality of cavities having a predetermined shape are formed on the outer peripheral surface of a die wheel 52 disposed on the molding device 51 . As shown in FIG. 9 , the die wheel 52 is stacked in such a manner that a plurality of disc-shaped (or ring-shaped) metal plates 55 having a desired thickness are stacked along the rotational axis direction of the die wheel 52, thereby formed into a cylindrical shape. In addition, each metal plate 55 has: a first lamination surface which is perpendicular to the rotation axis direction and which forms one side (rear side in FIG. 9 ) in the rotation axis direction; and a second lamination surface which is opposite to the rotation axis direction. The rotation axis direction is perpendicular to each other, and forms a surface on the other side (in FIG. 9 , the front side) of the rotation axis direction.

As shown in Figure 10, the metal plate 55 of mold wheel 52 has: the first plate 55a, and it is formed with the first mold cavity 56 that the hook portion 31 of engaging element 20 is shaped; The second cavity 57 in which the rod portion 21 of the engaging element 20 is molded, and the plurality of third plates 55c are arranged as partition plates. The first plate 55a to the third plate 55c are sequentially laminated one by one along the rotation axis direction.

The first plate 55a for forming the hook portion 31 has: a first cavity 56, which is hemispherically recessed on the first lamination surface of the first plate 55a, for forming the hook portion 31; and an auxiliary cavity 58 , which is formed to shape a part of the base end portion 22 of the rod portion 21 . The first cavity 56 is arranged on the hook portion 31 and the base portion 10 as shown in FIG. The spacing between corresponds to the distance separating the locations. That is, the first cavity 56 does not open on the outer peripheral surface of the first plate 55a.

The radius of curvature of the hemispherical first cavity 56 is set to the magnitude of the radius of curvature at the upper surface of the hook portion 31 shown in FIG. 1 and the like. Therefore, the radius of curvature of the first cavity 56 in the first embodiment is set to be 0.01 mm to 0.5 mm, preferably 0.05 mm to 0.1 mm. In addition, the first cavity 56 opened on the first lamination surface of the first plate 55 a can form the step 26 between the upper surface of the hook portion 31 of the engaging element 20 and the upper surface of the rod portion 21 . That is, it is formed so that the innermost position in the radial direction of the opening of the first lamination surface of the first cavity 56 is arranged at a distance from the radial direction of the opening of the second cavity 57 of the second plate 55b on the second lamination surface. The innermost position is more radially inward. Therefore, a step 59 is formed between the first plate 55a and the second plate 55b so that the second lamination surface of the second plate 55b is exposed to the first cavity 56 .

In addition, the auxiliary cavity 58 of the first plate 55a is recessed in the first lamination surface of the first plate 55a, and is formed so as to open on the outer peripheral surface of the first plate 55a. In this case, the hook arrangement surface 24 of the rod portion 21 of the engaging element 20 is formed by a flat first lamination surface arranged between the first cavity 56 and the auxiliary cavity 58 of the first plate 55 a.

Such a small first cavity 56 and auxiliary cavity 58 of the first plate 55a are formed by half-etching the first lamination surface of the first plate 55a. By using such a half etching process, the first cavity 56 and the auxiliary cavity 58 can be formed into predetermined shapes. Furthermore, each cavity surface of the first cavity 56 and the auxiliary cavity 58 is formed of a smooth curved etched surface. Thereby, the outer surface (in particular, the upper surface of the hook portion 31 ) that does not receive the pressure compression described later of the formed hook portion 31 and a part of the base end portion 22 of the rod portion 21 can be formed to have a relatively high surface roughness. Small smooth surface.

The second plate 55b that molds the rod portion 21 has a second lamination surface that is continuously recessed on the second lamination surface of the second plate 55b so as to extend from the outer peripheral surface of the second plate 55b toward the radially inner side of the second plate 55b. 2 mold cavities 57 . The second cavity 57 is used to form the stem portion 21 of the engaging element 20 together with the auxiliary cavity 58 of the first plate 55 a. Therefore, the second cavity 57 is formed such that the size of the second cavity 57 in the circumferential direction gradually decreases from the outer peripheral surface of the first plate 55a toward the inner side in the radial direction, so that the part having the rod portion 21 is formed in addition to the auxiliary cavity 58. A shape other than a formed part.

In addition, the second cavity 57 in the first embodiment is formed so that the cavity surface arranged at the innermost portion in the radial direction has a spherical surface. The second cavity 57 of the second plate 55b is formed by half-etching the second lamination surface of the second plate 55b. Thus, the cavity surface of the second cavity 57 is formed of a smooth curved etched surface. Therefore, the outer surface of the molded rod portion 21 can be formed as a smooth surface with relatively small surface roughness similarly to the upper surface of the hook portion 31 .

The third plate 55c of the first embodiment is formed of a disk-shaped plate without a cavity. In addition, the thickness (dimension in the rotation axis direction) of the third plate 55c is set according to the formation pitch in the intersecting direction (CD) of the engaging elements 20 provided on the molding surface connector 1 .

Make the first lamination surface of the first plate 55a and the second lamination surface of the second plate 55b face each other, make the first lamination surface of the second plate 55b face the second lamination surface of the third plate 55c, and make the third plate 55b face each other. The above-mentioned first plate 55a to third plate 55c are repeatedly laminated and fixed in sequence so that the first lamination surface of the plate 55c faces the second lamination surface of the first plate 55a. Thus, the first plate 55a and the second plate 55b are stacked adjacent to each other, and the first cavity 56 and the auxiliary cavity 58 of the first plate 55a communicate with the second cavity 57 of the second plate 55b. The die wheel 52 of the first embodiment is formed.

With regard to such die wheel 52 of the first embodiment, FIG. 10 shows a cross-sectional view of the die wheel 52 cut along the rotation axis direction at the center position in the machine direction (MD) of the rod portion 21 . In the cross-sectional view of FIG. 10 , with respect to the entire cavity that molds the engaging element 20, the first lamination surface of the first plate 55a at the position adjacent to the radially outer side of the first cavity 56 and the second laminated surface are arranged. The dimension in the rotation axis direction (CD) between the cavity surfaces of the 2nd cavity 57 of the plate 55b is set to D1. In addition, the dimension in the rotation axis direction (CD) between the cavity surface at the deepest position from the first lamination surface of the first cavity 56 and the cavity surface of the second cavity 57 of the second plate 55b is set to be D2.

In this case, on the outer peripheral surface of the die wheel 52 of the first embodiment, the above-mentioned dimension D1 is made smaller than the above-mentioned dimension D2 located on the inner side in the radial direction than the above-mentioned dimension D1, so that the engaging element 20 is formed. Forming cavity. Thus, the first cavity 56 of the first plate 55a is formed at a position separated inward from the outer peripheral surface of the die wheel 52 so that the temporary forming surface connector described later cannot be ejected while maintaining its shape. buckle shape.

Further, a circumferential ridge line portion is formed in an angular shape on the first plate 55 a so that the cavity surface of the first cavity 56 is substantially perpendicular to the first lamination surface. Among the circumferential ridgelines, the ridgeline portion arranged on the radially outer side of the arc portion is arranged so that the hook portion of the engaging element 20 can be pulled out when the engaging element 20 is pulled out from the die cavity of the die wheel 52 . The lower surface of 31 partially presses and compresses the edge portion 60 .

In addition, the die wheel 52 of the first embodiment is provided with an unillustrated rotation driving roller for rotating the die wheel 52 in one direction. Furthermore, in the die wheel 52 of the first embodiment, it is also possible to provide a cooling jacket (not shown) inside the die wheel 52 through which the coolant flows. Thereby, the molding surface connector 1 molded by the outer peripheral surface part of the die wheel 52 can be cooled efficiently.

The pick-up roller 54 shown in FIG. 8 has the function of clamping the forming surface connector 1 (temporary forming surface connector) formed by the peripheral surface of the die wheel 52 from up and down and pulling the forming surface connector 1 (temporary forming surface connector). A pair of rollers, the upper side pinch roller 54a and the lower side pinch roller 54b. In addition, the outer peripheral surface of the upper side nip roll 54a that is in contact with the molding surface connector 1 and the outer peripheral surface of the lower side nip roller 54b that is in contact with the molding surface connector 1 are provided with elastic materials made of polyurethane elastomer or the like. unillustrated surface layer.

The upper side nip roller 54a and the lower side nip roller 54b are oppositely arrange|positioned with predetermined space|interval. The upper pinch roll 54a and the lower pinch roll 54b rotate at a predetermined speed in a predetermined direction, respectively, so that the molding surface connector 1 can be continuously peeled off from the die wheel 52, and the molding surface connector 1 can be attached to the mold wheel 52. The downstream side is sent out smoothly.

When manufacturing the molded surface connector 1 using the manufacturing apparatus 50 as described above, first, the melted synthetic resin material is continuously ejected from the extrusion nozzle 53 toward the outer peripheral surface of the die wheel 52 . At this time, the die wheel 52 is driven to rotate in one direction. Therefore, by extruding the molten resin material to the peripheral surface of the die wheel 52, the synthetic resin material is continuously filled in the space between the continuous extrusion nozzle 53 and the rotating die wheel 52, and the synthetic resin material is also supplied to the set. Each molding cavity (space portion) on the outer peripheral surface of the die wheel 52 is filled.

At this time, the molten synthetic resin material flows into the auxiliary cavity 58 of the first plate 55a and the second cavity 57 of the second plate 55b from the outer peripheral surface of the mold wheel 52, and passes through the second cavity of the second plate 55b. 57 flows into the first cavity 56 of the first plate 55a. Thus, the space part of the cavity for forming the engaging element formed by the first cavity 56 , the second cavity 57 and the auxiliary cavity 58 is filled with the synthetic resin material.

Next, as described above, the synthetic resin material that is continuously filled between the extrusion nozzle 53 and the die wheel 52 and filled into each cavity of the die wheel 52 is carried by the outer peripheral surface of the die wheel 52 rotating in one direction. , while being cooled to a temperature lower than the melting point. Thereby, a plurality of engaging elements (temporary engaging elements) corresponding to the shape of the cavity provided to the die wheel 52 are molded and erected to the forming surface of the base material portion 10 formed on the outer peripheral surface of the die wheel 52 Connectors (temporary forming surface connectors). That is, the engagement element (temporary engagement element) in the state where the resin molded at this time is filled into the cavity is omitted from the illustration, but has the above-mentioned stem portion 21 and a hemisphere protruding from the stem portion 21 in the C direction. Shaped hook (temporary hook). In addition, the outer surface including the upper surface and the lower surface of the formed hemispherical hook portion (temporary hook portion) is formed by the cavity surface of the first cavity 56 .

The forming surface connector (temporary forming surface connector) formed by the outer peripheral surface of the die wheel 52 is then continuously and forcibly (forcibly) peeled off from the outer peripheral surface of the die wheel 52 by the above-mentioned pickup roller 54 . At this time, in the cavity formed on the outer peripheral surface of the die wheel 52, the first cavity 56 of the first plate 55a is formed in an undercut shape as described above.

Therefore, as shown in FIG. 11 , the forming surface connector 1 is pulled by the pick-up roller 54, so that the hemispherical hook portion of the engaging element (temporary engaging element) formed in the cavity is removed from the cavity. When pulling out, the above-mentioned edge portion 60 formed on the first plate 55a is pressed from the lower surface side of the hook portion to be compressed. At this time, since the die wheel 52 rotates in the machine direction, the pressed hook portion also receives an external force that is twisted in the machine direction by the edge portion 60 of the first plate 55a.

In particular, in the first embodiment, a step 59 is formed between the first plate 55a and the second plate 55b so that the second lamination surface of the second plate 55b is exposed to the first cavity 56 as described above. Therefore, it is possible to make it more difficult for the hemispherical hook portion of the temporary engaging element to be pulled out from the first cavity 56 of the first plate 55a. Thereby, the lower surface of the hook part can be pressed and compressed by the edge part 60 of the 1st plate 55a.

After the edge portion 60 of the first plate 55a is used to press and compress the hemispherical hook portion within a certain range (volume) while pulling out the temporary engaging element, the stem portion 21 of the engaging element 20 is moved toward the back of the stem. 25 is slightly deformed (elastically deformed) so that the hook can be pulled out from the first cavity 56 easily. In addition, at the same time, the hook is pulled out from the first cavity 56 of the first plate 55a while being further pressed by the edge portion 60 of the first plate 55a and rubbing against the lower surface of the hook. The lower surface of the hemispherical hook portion is pressed and compressed by the edge portion 60 of the first plate 55a, and is rubbed by the edge portion 60 of the first plate 55a, thereby forming the above-mentioned smooth and smooth surface on the lower surface of the hook portion 31. Harder compression face 32 .

Then, when the hook portion is pulled out from the first cavity 56 , the hook portion is pressed by the edge portion 60 while receiving the aforementioned torsional external force from the edge portion 60 . Therefore, the hook portion is integrally deformed in a manner of inclining upward from the stem portion 21 toward the hook tip or in a curved manner, and is deformed into an asymmetrical shape in the M direction. Then, after the hook portion is pulled out from the first cavity 56 of the first plate 55 a, the engaging element is pulled continuously to pull the entire engaging element out of the cavity of the die wheel 52 .

Then, the forming surface fastener peeled off from the die wheel 52 and deformed at the hook portion is introduced between the upper nip roller 54a and the lower nip roller 54b of the pick-up roller 54, which are spaced apart from each other by a predetermined interval, and is picked up. It is sandwiched between the upper side nip roller 54a and the lower side nip roller 54b. At this time, the hook portion pulled out from the cavity of the die wheel 52 as described above and deformed upward from the rod portion 21 is pressed from above by the upper side nip roller 54 a. Thereby, the hook portion deformed so as to tilt upward can be forcibly (positively) plastically deformed downward so that the hook portion faces the C direction. Thus, the molded surface connector 1 of the first embodiment shown in FIG. 1 was manufactured.

After that, the forming surface connector 1 that is elongated in the machine direction passing between the upper pinch roller 54a and the lower side pinch roller 54b of the pick-up roller 54 is conveyed toward a not-shown cutting section, and is cut by the cutting section. It is cut to a predetermined length and recycled. Alternatively, the elongated molding surface connector 1 is directly wound up in a roll shape on a recovery roll or the like, and recovered.

The molding surface connector 1 of the present embodiment 1 manufactured as described above has: the rod part 21, which is erected thickly from the base material part 10; The direction stands out. Furthermore, when the hook portion 31 of the engaging element 20 is viewed from the C direction (see FIG. 4 ), the hook portion 31 is formed asymmetrically in the width direction (MD) of the hook portion 31 . The engaging element 20 of the first embodiment in which such a hook portion 31 is formed has a characteristic form completely different from the conventional J-shape, palm tree shape, and mushroom shape. Furthermore, the molding surface connector 1 having such a characteristic form of the engaging element 20 has the following characteristic properties that cannot be obtained in conventional molding surface connectors.

Specifically, in the molded surface connector 1 of the first embodiment, the rod portion 21 of the engaging element 20 is formed thick, and the upper surface (top end surface) of the rod portion 21 is spherical. Therefore, the strength of the rod portion 21 can be increased, and the skin feel of the engaging element 20 can be improved.

In this way, due to the high strength of the rod portion 21, even if the forming surface connector 1 of the first embodiment is strongly pressed against, for example, a female surface connector and receives a large pressing force, the rod portion 21 is difficult to bend and can be stably The shape of the snap-in element 20 is maintained. Moreover, thereby, the molding surface connector 1 of the present embodiment 1 can be pressed into a deeper position relative to the female molding surface connector, in other words, each engaging element 20 of the molding surface connector 1 can be deeply inserted. to near the root of the loop of the female profile connector. As a result, the molding surface connector 1 of the first embodiment can more easily catch the ring of the female surface connector, and thus can be smoothly and stably engaged with the female surface connector.

In addition, since the strength of the rod portion 21 is high as described above, the shear strength of the molding surface fastener 1 with respect to the female surface fastener can be increased. Here, the shear strength refers to a state where the female surface connector is attached to the molding surface connector 1 and the two are engaged, and the molding surface connector 1 and the female surface connector are formed along the Engagement strength when the surface connector 1 is pulled such that the longitudinal direction and the width direction are relatively shifted.

Furthermore, in the engaging element 20 of the first embodiment, the extremely small hook portion 31 protrudes toward the C direction from the upper end portion of the rod portion 21 . Furthermore, the lower surface of the hook portion 31 of the engaging element 20 partially has the compression surface 32 formed smoother than the upper surface of the hook portion 31 as described above. Therefore, when the ring of the female surface connector is engaged with the forming surface connector 1 of the first embodiment, the engaging element 20 can be smoothly inserted between the rings of the female surface connector, and the ring can be It is stably engaged with the hook portion 31 of the engaging element 20 .

Also, since the lower surface of the hook portion 31 has a relatively hard and smooth compression surface 32, even if the loop is pulled upward, the hook portion 31 itself is difficult to deform upward. Furthermore, since the rod portion 21 is thick and has high strength, the rod portion 21 itself can effectively prevent the upward deformation of the hook portion 31 . On this basis, in the forming surface fastener 1 of the present embodiment 1, the upper surface of the hook portion 31 is set higher than the upper surface of the rod portion 21 by means of the step 26 . Thus, the ring engaged with the engaging element 20 is easily hooked on the step 26 between the hook portion 31 and the rod portion 21 .

As a result, in the molding surface connector 1 of the present embodiment 1, the ring hooked on the hook portion 31 of the engaging element 20 and engaged with the hook portion 31 of the engaging element 20 is difficult to come off from the engaging element 20. open. Therefore, according to the molded surface fastener 1 of the first embodiment, it is possible to stably obtain high peel strength with respect to the female surface fastener. Here, the peeling strength refers to, in the state where the female surface connector is bonded to the molding surface connector 1 and the two are engaged, the molding surface connector 1 and the female surface connector are moved along the molding surface. The engagement strength when the connector 1 is pulled apart in the height direction relative to each other.

As described above, since the molding surface connector 1 of the first embodiment has a characteristic form that has not been found in the past, it becomes a new type of molding surface connector 1 that has the following advantages at the same time: the rod portion 21 is difficult to bend, and a good shape is obtained. The advantages of skin touch; compared with the female surface connector, it has the advantages of higher peel strength and shear strength.

In this way, the forming surface fastener 1 of the present embodiment 1, which has high peel strength and shear strength and good skin feel, is particularly suitable for use in protective devices such as disposable diapers, diaper pants for infants, and joints for protecting hands and feet. Products that are detachable from the body, such as corsets for the waist, gloves, etc. Furthermore, the new molding surface connector 1 that has not been conventionally used in the first embodiment is provided by being added to the conventional molding surface connector, and the variation of the molding surface connector can be increased. As a result, it becomes easy to cope more appropriately with various types of female profile connectors (nonwoven fabrics).

In addition, the molding surface connector 1 of the first embodiment described above is formed to have only the engaging elements 20 in which the hook portions 31 of the engaging elements 20 protrude in one of the left-right directions (CD). However, the molded surface fastener of the present invention may be formed to have only engaging elements such as hook portions of each engaging element protruding in the other direction of the left and right directions. In addition, as shown in FIG. 12 , the forming surface connector of the present invention may be mixedly formed with hooks 31 protruding in one direction of the left-right direction, engaging elements 20 and hooks 31 protruding in the other direction of the left-right direction. The profiled surface connector 1a of the snap-in element 20a. In this case, in the present invention, the arrangement of the engaging elements 20 protruding in one direction of the left-right direction and the engaging elements 20a protruding in the other direction of the left-right direction, and the arrangement of the engaging elements 20, 20a The number, ratio, and the like can be selected arbitrarily.

Example 2

Fig. 13 is a perspective view showing the molding surface connector of the second embodiment. Fig. 14 is a perspective view showing only the engaging elements of the molding surface connector. 15 to 17 are a front view, a right side view, and a left side view of the engaging element, respectively.

In the molding surface fastener 2 of the second embodiment, the engaging element 20b is formed by making the relative position of the hook portion 31b different from the rod portion 21 compared with the molding surface fastener 1 of the above-mentioned embodiment 1. On the other hand, the shape of the base part 10, the shape of the stem part 21, and the shape of the hook part 31b itself are the same as those of the base part 10, the shape of the stem part 21, and the shape of the hook part 31 in the first embodiment described above.

Therefore, in the present embodiment 2 and the later-described embodiment 3, the parts or positions different from the forming surface connecting member 1 of the foregoing embodiment 1 will be mainly described, and the parts having the forming surface connecting member 1 of the foregoing embodiment 1 Parts or members having substantially the same shape or structure in the component 1 are denoted by the same reference numerals, and description thereof will be omitted.

The molding surface connector 2 of the second embodiment has a thin-plate-shaped base portion 10 and a plurality of engaging elements 20 b erected on the upper surface of the base portion 10 . The base material part 10 is formed similarly to the base material part 10 of Example 1 mentioned above.

Each engaging element 20b of the second embodiment has a rod portion 21 standing up from the base portion 10 and a hook portion 31b protruding from the upper end of the rod portion 21 in the cross direction (CD). In the case of the first embodiment, all the hook portions 31b of the respective engaging elements 20b protrude from the rod portion 21 in the same direction (right side) in the intersecting direction.

The rod portion 21 of the second embodiment is formed in the same manner as the rod portion 21 of the above-mentioned first embodiment.

The hook portion 31b itself of the second embodiment is formed in the same manner as the hook portion 31 of the first embodiment described above. That is, the main outer peripheral surface of the hook portion 31b facing upwards and left and right sides of the present embodiment 2 is formed in a spherical shape, and on the lower surface of the hook portion 31b, there is disposed a material formed by pressing and compressing in the forming process. The compression surface 32 is smoother than the main peripheral surface. In addition, the hook portion 31 b of the second embodiment has an asymmetric shape in the front-rear direction (the width direction of the rod portion 21 ).

On the other hand, the relative position of the hook portion 31 b with respect to the rod portion 21 in the second embodiment is different from that in the first embodiment described above. In the engaging member 20 of the aforementioned Embodiment 1, for example, a step 26 is provided between the upper surface of the hook portion 31 and the upper surface of the rod portion 21 . However, in the engaging element 20b of the second embodiment, a part of the upper surface of the hook portion 31b is continuously arranged from the upper surface of the rod portion 21, and there is no gap between the upper surface of the hook portion 31b and the upper surface of the rod portion 21. Steps 26 as in the first embodiment described above are provided.

The hook portion 31b is formed so as to protrude toward one side (right side) in the C direction from the rod portion 21 . In this case, even if the upper surface of the hook portion 31b and the upper surface of the rod portion 21 are arranged continuously, the portion of the upper surface of the hook portion 31b adjacent to the rod portion 21 and the portion of the upper surface of the rod portion 21 adjacent to the hook portion 31b The adjacent parts are arranged at different angles (orientations) (in other words, the tangential direction of the part of the upper surface of the hook part 31b adjacent to the rod part 21 and the part of the upper surface of the rod part 21 adjacent to the hook part 31b tangent directions are different from each other).

Therefore, in a front view ( FIG. 15 ) of the engaging element 20 b , a boundary portion such as a dimple may be arranged between the upper surface of the hook portion 31 b and the upper surface of the rod portion 21 . In addition, depending on the protruding direction of the hook portion 31b, the boundary portion as described above may not be formed, but a part of the upper surface of the hook portion 31b may be formed smoothly continuous with the upper surface of the rod portion 21 .

In this case, the radius of curvature of the upper surface of the hook portion 31b (the upper end edge of the hook portion 31b) is set to be 0.01 mm or more and 0.5 mm or less (preferably 0.05 mm or more) as in the case of the first embodiment described above. And is below 0.1mm). The radius of curvature at the upper surface of the rod portion 21 (the upper end edge of the rod portion 21 when viewed from the front or side) is larger than the radius of curvature at the upper surface of the hook portion 31b, and is set to be 0.01 mm or more and 0.5 mm. or less (preferably not less than 0.05 mm and not more than 0.1 mm).

The molding surface connector 2 of this Example 2 which has the said engaging element 20b is manufactured using the manufacturing apparatus 50 shown in FIG. 8 similarly to the case of the said Example 1. FIG. In the die wheel 52 used in the manufacturing apparatus 50 of the second embodiment, the molding cavity formed on the outer peripheral surface of the die wheel 52 to form the engaging element 20b has a shape different from that of the first embodiment described above.

That is, the die wheel 52 of the second embodiment has a plurality of disk-shaped metal plates 55 stacked so as to overlap along the rotation axis direction of the die wheel 52 . Although the metal plate 55 of the mold wheel 52 is omitted from the illustration, it has a first plate on which a hemispherical first cavity for forming the hook portion 31b of the engaging element 20b and a base for forming the stem portion 21 are formed. A part of the auxiliary cavity of the end portion 22; a second plate 55b forming a second cavity 57 for forming the stem portion 21 of the engaging element 20b; and a plurality of third plates 55c arranged as partitions.

In this case, the second plate 55b and the third plate 55c of the second embodiment are the same as the second plate 55b and the third plate 55c of the first embodiment described above. On the other hand, the first cavity opened on the first lamination surface of the first plate does not form a step between the upper surface of the hook portion 31b of the engaging element 20b and the upper surface of the rod portion 21 . That is, the innermost position in the radial direction of the opening of the first cavity on the first lamination surface is opposite to the innermost position in the radial direction of the opening of the second cavity 57 in the second plate 55b on the second lamination surface. formed. In addition, the die wheel 52 of the second embodiment is formed substantially in the same manner as the die wheel 52 of the first embodiment described above, except that the relative positions of the first cavities of the first plate are different.

Therefore, also in the die wheel 52 of the second embodiment, the first cavity of the first plate is formed in an undercut shape at a position spaced inward from the outer peripheral surface of the die wheel 52 . In addition, in the first plate of the second embodiment, the arc portion arranged on the outer side in the radial direction is arranged in the circumferential ridge portion between the cavity surface of the first cavity and the first lamination surface. The ridge line portion is configured as an edge portion that partially presses the lower surface of the hook portion to compress the lower surface of the hook portion when the engaging element is pulled out from the cavity of the die wheel 52 .

In the second embodiment, the manufacturing device 50 having the mold wheel 52 having the molding cavity of the engaging element 20b as described above is used to manufacture the molded surface connector 2 in the same manner as in the first embodiment described above. .

That is, the melted synthetic resin material is continuously extruded from the extrusion nozzle 53 toward the outer peripheral surface of the die wheel 52 , and the outer peripheral surface of the die wheel 52 molds the molding surface connector (temporary molding surface connector). The molding surface connector is cooled to a temperature lower than the melting point while being supported by the outer peripheral surface portion of the rotating die wheel 52 .

Next, the forming surface connector formed by the outer peripheral surface of the die wheel 52 is continuously and forcibly (forcibly) peeled off from the outer peripheral surface of the die wheel 52 by the above-mentioned pickup roller 54 . At this time, the hook portion of the engaging element (temporary engaging element) formed in the cavity of the die wheel 52 is pressed by the above-mentioned edge portion of the first plate, compressed, and rubbed. Thereby, a smooth compression surface 32 is formed on the lower surface of the hook portion. And at this time, the hook portion is pressed by the edge portion while receiving an external force of torsion from the edge portion, so that the hook portion is inclined upward from the stem portion toward the tip end of the hook and deformed as a whole in a curved manner, and, It is deformed into a shape asymmetric in the M direction.

Then, the forming surface connector peeled off from the die wheel 52 is immediately introduced between the upper nip roller 54a and the lower nip roller 54b of the pick-up roller 54 which are spaced apart from each other by a predetermined interval, and is nipped between them. Between the upper side nip roller 54a and the lower side nip roller 54b. Thereby, similar to the case of the above-mentioned first embodiment, the hook portion deformed upward from the rod portion 21 is pressed from above by the upper side pinch roller 54a, therefore, the hook portion deformed upward can be forcibly The hook is plastically deformed positively (positively) so that the hook faces the left-right direction (CD). Thus, the molded surface connector 2 of the second embodiment shown in FIG. 13 was manufactured.

After that, the forming surface connector 2 that is elongated in the machine direction passing between the upper pinch roll 54a and the lower pinch roll 54b of the pick-up roll 54 is conveyed toward a not-shown cutting section, and is cut by the cutting section. It is cut to a predetermined length and recycled. Alternatively, in the state of the elongated molding surface connector 2, it is directly wound up in a roll shape on a recovery roll or the like, and recovered.

In the molded surface connector 2 of the second embodiment manufactured as described above, the rod portion 21 itself and the hook portion 31b itself have the same characteristic forms as the rod portion 21 and the hook portion 31 of the above-mentioned embodiment 1, respectively. That is, the stem portion 21 of the engaging element 20b is thickly formed, and the upper surface (top end surface) of the stem portion 21 has a spherical surface. Furthermore, in the second embodiment, no step 26 is provided between the upper surface of the hook portion 31 b and the upper surface of the rod portion 21 , and the upper surface of the hook portion 31 b and the upper surface of the rod portion 21 are continuously arranged. Therefore, in the molding surface fastener 2 of the present Example 2, it is possible to obtain a better skin feel than that of the molding surface fastener 2 of the above-mentioned Example 1.

In addition, since the rod portion 21 of the engaging element 20b has high strength, it is possible to increase the shear strength of the molded surface connector 2 relative to the female profiled surface connector. Furthermore, the hook portion 31b of the engaging element 20b protrudes in the left-right direction (CD) from the upper end portion of the rod portion 21 , and a smooth and hard compression surface 32 is partially provided on the lower surface of the hook portion 31b. Therefore, in the molding surface fastener 2 of the present embodiment 2, the ring hooked to the hook portion 31b of the engaging element 20b is difficult to disengage from the engaging element 20b. High peel strength.

Example 3

Fig. 18 is a perspective view showing the molding surface connector of the third embodiment. Fig. 19 is a perspective view showing only the engaging elements of the molding surface connector. 20 to 22 are a front view, a right side view, and a left side view of the engaging element, respectively.

The molding surface connector 3 of the third embodiment has a thin plate-shaped base portion 10 and a plurality of engaging elements 70 erected on the upper surface of the base portion 10 . The base material part 10 is formed similarly to the base material part 10 of the above-mentioned Examples 1 and 2.

Each engaging element 70 of the third embodiment has a stem portion 71 standing up from the base portion 10 and a hook portion 81 protruding from the upper end of the stem portion 71 in the cross direction (CD). Also in the case of the third embodiment, all the hook portions 81 of the engaging elements 70 protrude from the rod portion 71 in the same direction in the intersecting direction.

The rod portion 71 of the engaging element 70 stands upright on the upper surface of the base portion 10 . The shaft portion 71 has: a base end portion 72 standing up from the base material portion 10 and having a curved surface on the entire outer peripheral portion; a shaft main body portion 73 continuously disposed on the base end portion 72; and a shaft head. The portion 76 is disposed on the rod main body portion 73 and has a shape that is crushed from above. The rod portion 71 of the third embodiment has a symmetrical shape in the machine direction (the width direction of the rod portion 71 ) based on the center position in the machine direction (MD).

The base end portion 72 of the rod portion 71 is formed such that the area of the cross section perpendicular to the vertical direction increases gradually as it approaches the base portion 10 in order to increase the strength of the rod portion 71 relative to the base portion 10 .

The cross section of the rod main body 73 perpendicular to the vertical direction has a shape close to a semicircle or a shape larger than a semicircle surrounded by arcs and chords of a circle. In addition, the rod main body portion 73 has a form in which the area of the cross section perpendicular to the vertical direction increases gradually as it approaches the base portion 10 .

In addition, the rod main body 73 has a flat hook arrangement surface 74 on which the hook 81 is disposed, and a rod outer peripheral surface having an arc shape in a cross section perpendicular to the vertical direction. The hook placement surface 74 is formed of a single flat surface that is perpendicular to the upper surface of the base portion 10 and perpendicular to CD.

Moreover, the lever part 71 has the lever back surface 75 arrange|positioned at the side opposite to the hook arrangement|positioning surface 74, when the engaging element 70 is seen from front (refer FIG. 20). The lever back surface 75 is formed such that the dimension on the CD between the hook arrangement surface 74 and the lever back surface 75 gradually decreases as it moves away from the upper surface of the base member 10 when the engaging element 70 is viewed from the front.

In this case, the rod back surface 75 has, when viewed from the front of the engaging element 70 , an upper back surface 75 d disposed on the rod head 76 , and an upper curved surface 75 a convexly (or arcuately) disposed on the rod head 76 . The upper end portion of the main body of the rod portion 71; the lower curved surface portion 75b, which is adjacent to the base portion 10, and is disposed in a concave shape on the lower end portion of the rod portion 71; and the inclined surface portion 75c, which is disposed between the upper curved portion 75a and the lower portion Between the side curved parts 75b.

Furthermore, the rod main body portion 73 is formed such that the dimension in the M direction between the left and right side edges gradually decreases as the distance from the upper surface of the base material portion 10 increases when the engaging member 70 is viewed from the side (see FIG. 21 or FIG. 22 ). .

The rod main body portion 73 of the third embodiment is formed as described above, so that the rod portion 71 can have high strength, and therefore, even if the engaging element 70 is subjected to an external force, it can hardly be deformed. In particular, the rod portion 71 can hardly be deformed so as to fall toward the rod back surface 75 side in the C direction.

The head portion 76 of the rod portion 71 is thinly formed on the rod main body portion 73 with a small height dimension. The head portion 76 is formed such that the cross-sectional shape perpendicular to the vertical direction has substantially the same shape at any height position. The upper surface 76 a of the head portion 76 (in other words, the upper surface or tip end surface of the shaft portion 71 ) is formed as a flat surface parallel to the upper surface of the base material portion 10 . In addition, the upper surface 76 a of the head portion 76 is disposed so as to form a single flat surface with a base end side upper surface 85 a of the hook portion 81 which will be described later.

The hook portion 81 of the third embodiment has a characteristic form in which the hook tip portion 86 is inclined downward, and a compression surface 82 formed smoother than the hook upper surface 85 is arranged on the lower surface of the hook portion 81 . Here, the lower surface of the hook portion 81 refers to the lower end portion of the connecting portion that is arranged from the top end of the hook portion 81 to the connection portion connected to the rod portion 71 in the hook portion 81 as described above on the outer surface of the hook portion 81 , and The portion arranged facing downward or obliquely downward (that is, facing the base portion 10 ).

In addition, the hook portion 81 of the present embodiment 3 has: a hook main body portion 83 protruding from the rod portion 71 in the left-right direction (CD); Arranged so as to protrude in the front-rear direction (MD). The hook main body portion 83 has a tapered shape that becomes smaller as it gets away from the stem portion 71 . That is, the hook main body portion 83 is formed such that the dimension in the rod width direction (dimension in the front-rear direction) gradually decreases as it gets away from the rod portion 71 . By forming in this way, the loop can be easily hooked on the hook main body portion 83 . Furthermore, it is preferable that the hook main body portion 83 is formed such that the dimension in the up-down direction of the rod also gradually decreases as the distance from the rod portion 71 increases. In addition, reinforcing ribs 84 are disposed on both front and rear sides of the hook main body 83 , so that the strength of the hook 81 can be effectively increased.

As shown in FIG. 20, the upper surface (hook upper surface) 85 of the hook portion 81 has: a base end side upper surface 85a disposed at the hook base end (the end on the rod connection side); and a distal end side upper surface 85b. , which slopes downward from the base end side upper surface 85a toward the hook tip. The proximal-side upper surface 85 a of the hook portion 81 is arranged continuously from the upper surface 76 a of the head portion 76 and forms a single flat surface with the upper surface 76 a of the head portion 76 . In this case, the flat proximal-side upper surface 85 a of the hook portion 81 is arranged across the hook main body portion 83 and the front and rear reinforcement ribs 84 .

In the engaging element 70 of the third embodiment, the upper surface 76a of the head portion 76 and the proximal upper surface 85a of the hook portion 81 are formed as flat surfaces parallel to the upper surface of the base member 10 as described above. At the same time, the tip-side upper surface 85b of the hook portion 81 is formed to be inclined downward toward the hook tip. Thereby, the skin feeling of the upper end part of the engaging element 70 when it touches the molding surface connector 3 from the upper surface side can be made favorable.

For example, the lower surface of the hook portion 81 is formed in the following shape when viewed from the front of the engaging element 70 (see FIG. It inclines slightly upward so that the distance therebetween gradually increases, and then slopes downward so that the distance between the lower surface of the hook part 81 and the base material part 10 gradually decreases. That is, the hook portion 81 of the present embodiment 3 is formed such that the hook top end portion 86 is formed to be inclined downward, and the lower surface of the hook portion 81 has a ring hooked on the hook top end and the rod portion 71 when viewed from the front of the engaging element 70 . A curved surface (concave surface) that is slightly curved or bent in a concave shape.

In addition, the concave lower surface of the hook portion 81 has a compressed surface 82 formed smoother and brighter than the upper surface of the hook portion 81 by being pressed and compressed. The compressed surface 82 reflects light more than the upper surface of the hook portion 81, and the compressed surface 82 may also be partially glossy. In addition, it is preferable that the compression surface 82 of the hook portion 81 is formed harder than the upper surface of the hook portion 81 .

Furthermore, in the third embodiment, when the hook portion 81 is viewed from the machine direction (especially when the hook portion 81 is viewed from the rear side), the radius of curvature at the outer surface of the tip portion 86 of the hook portion 81 is the same as that of the above-mentioned embodiment. In the case of 1, it is set within the range of 0.06 mm to 0.18 mm, preferably within the range of 0.12 mm to 0.15 mm.

In the engaging element 70 of the third embodiment, although the rod portion 71 has a symmetrical shape in the M direction (the width direction of the rod portion 71 ), the hook portion 81 has a shape symmetrical in the M direction (the width direction of the hook portion 81 ). Asymmetrical shape. That is, the front half part of the hook part 81 arranged in the front and the rear half part arranged in the rear with respect to the center position in the M direction are formed in completely different forms that are asymmetrical to each other. In addition, when the side view of the engaging element 70 is viewed from the hook portion 81 side in the C direction (see FIG. 21 ), the distal end surface 87 is disposed so as to be sandwiched between the distal upper surface 85b of the hook portion 81 and the compression surface 82. .

In this case, the hook distal end portion 86 is disposed behind the center position of the hook portion 81 in the front-rear direction (MD). In addition, the rear end portion of the compression surface 82 in the hook portion 81 is arranged at a position higher than the front end portion of the compression surface 82 so that, for example, in the front view of the engagement element 70 shown in FIG. The rear end portion of the compression surface 82 is hidden from view.

In addition, in this Example 3, the specific size of the engaging element 70 is set as follows.

For example, in the vertical direction, the maximum height dimension H1 of the engaging element 70 from the upper surface of the base part 10 is set to be 0.1 mm or more and 1.5 mm or less, preferably 0.2 mm or more and 1.0 mm or less. the following. The height dimension H4 of the tip portion 86 of the hook portion 81 in the vertical direction from the upper surface of the base portion 10 is set to be smaller than the above-mentioned maximum height dimension H1, and is set to be 0.1 mm or more and 1.5 mm or less, It is preferable to set it to 0.2 mm or more and 1.0 mm or less.

In the M direction (the width direction of the engaging member 20), the maximum dimension in the machine direction in the rod portion 71 (that is, the dimension in the machine direction at the base end portion 72 of the rod portion 71) L1 is set to be 0.1 mm or more and 1.5 mm or less, preferably 0.2 mm or more and 1.0 mm or less. Moreover, the maximum dimension L2 of the machine direction in the hook part 81 is set to 0.01 mm or more and 1.0 mm or less, Preferably it is set to 0.05 mm or more and 0.5 mm or less.

In the C direction, the maximum dimension in the intersecting direction in the rod portion 71 (that is, the dimension in the intersecting direction at the base end portion 72 of the rod portion 71) W1 is set to be 0.1 mm or more and 1.5 mm or less, preferably set to It is set to be 0.1 mm or more and 1.0 mm or less. In addition, the maximum dimension in the intersecting direction of the hook portion 81 (that is, the dimension in the intersecting direction from the tip of the hook portion 81 to the hook arrangement surface 74 of the rod portion 71) W2 is set to be 0.01 mm or more and 1.0 mm or less, It is preferable to set it to 0.05 mm or more and 0.5 mm or less.

Moreover, the inclination angle of the above-mentioned inclined surface part 75c of the rod part 71 with respect to the up-down direction is set to 5 degrees or more and 20 degrees or less. Preferably, the above-mentioned maximum dimension W2 in the C direction of the hook portion 81 is set to be less than half the dimension W3 of a line segment parallel to the C direction between the lower end of the hook portion 81 and the hook placement surface 74 of the rod portion 71 (in other words, , it is preferable that the size W3 is set to be equal to or larger than twice the maximum size W2). It is preferable that the above-mentioned maximum dimension L2 of the M direction in the hook portion 81 is set to be half or less of the dimension L3 of the rod portion 71 in the M direction at the lower end position of the hook portion 81 (in other words, the preferred dimension L3 is set to be the maximum dimension). twice the size of L2).

The molding surface connector 3 of the third embodiment as described above is manufactured using the manufacturing apparatus 90 shown in FIG. 23 .

This manufacturing device 90 has: a molding device 51, which performs molding of a primary molded body described later of the molding surface connector 3; a pickup roller 54, which peels the formed primary molded body from the molding device 51, and makes the primary molded body A part of the temporary element described later of the body deforms;

In this case, the molding device 51 and the pick-up roll 54 of the third embodiment are the same as those of the first embodiment described above. Therefore, in the die wheel 52 of the present embodiment 3, the first cavity 56 of the first plate 55a is formed at a position spaced inward from the outer peripheral surface of the die wheel 52 to form a primary molded body of the molding surface connector 3 which will be described later. An undercut shape that cannot be molded in a way that retains its shape. And, among the circumferential ridgelines of the first plate 55a, the ridgelines of the circular arc portions arranged on the radially outer side are arranged so as to pull out the primary part of the temporary part when the temporary part of the primary molded body is pulled out. The lower surface of the hook part presses locally to compress the edge portion 60 of the lower surface of the primary hook part of the temporary element.

The heating and pressing device 91 of the third embodiment has a pair of upper and lower pressing rolls (calender rolls) 91a, 91b. The upper pressing roller 91a and the lower pressing roller 91b are arranged facing each other with a predetermined interval therebetween. In this case, the distance between the upper pressing roller 91a and the lower pressing roller 91b can be adjusted by a height adjusting member not shown. In the case of Example 3, it is adjusted according to the height dimension from the lower surface (back surface) of the base material part 10 of the manufactured molding surface fastener 3 to the upper surface 76a of the head part 76 .

The upper pressing roller 91a is provided with a heating source (not shown) inside. In this case, the surface temperature of the upper pressing roller 91 a is set to a temperature capable of softening the synthetic resin forming the molding surface connector 3 . Specifically, it is set to a predetermined temperature that is not less than "the temperature of the melting point of the synthetic resin - 40° C." and not more than "the temperature of the melting point of the synthetic resin -10° C.". In addition, the upper side pressing roller 91a is arranged so as to rotate counterclockwise in FIG. 23 . The outer peripheral surface of the upper pressing roller 91a is a surface that presses the heated temporary element of the primary molded body formed in the primary molding process from above.

The lower side pressing roller 91b is arrange|positioned so that it may rotate clockwise in FIG. 23, and serves as the support surface which supports the conveyed primary molded object from below. In addition, in this invention, the upper side belt mechanism and/or the lower side belt mechanism which are not shown in figure can be used instead of the upper side pressing roller 91a and/or the lower side pressing roller 91b. In this case, the upper belt mechanism and the lower belt mechanism respectively have an endless belt and a pair of left and right rotating rollers, the endless belt is wound around the pair of left and right rotating rollers, and the pair of left and right rotating rollers make the endless belt Rotate in one direction.

In the case of using the manufacturing device 90 having the above-mentioned forming device 51, pick-up roller 54, and heating and pressing device 91 to manufacture the forming surface connector 3 of the third embodiment, first, the forming device 51 is used to form the forming surface connector. 3. The primary forming process for forming the primary forming body. The primary molding step of the present Example 3 was performed in the same manner as the molding step of the aforementioned Example 1.

That is, in the primary molding process of the present embodiment 3, the molten synthetic resin material is continuously extruded from the extrusion nozzle 53 toward the outer peripheral surface of the die wheel 52, and is continuously injected between the extrusion nozzle 53 and the rotating die wheel 52. The space between the mold wheels 52 and the cavities (spaces) provided on the outer peripheral surface of the mold wheel 52 are filled with a synthetic resin material.

Moreover, the filled synthetic resin material is cooled to a temperature lower than the melting point while being carried by the outer peripheral surface of the mold wheel 52, so that the upper surface of the base material part 10 is vertically provided with a primary hook part and a non-illustrated hook part. A primary formed body (temporary primary formed body) of a plurality of temporary elements of the primary shaft is formed. The primary molded body (temporary primary molded body) formed at this time is the same as the temporary molded surface connector of the first embodiment described above.

Thereafter, the primary molded body formed by the die wheel 52 is continuously and forcibly (forcibly) peeled off from the outer peripheral surface of the die wheel 52 by the above-mentioned pickup roller 54 . At this time, in the cavity formed on the outer peripheral surface of the die wheel 52, the first cavity 56 of the first plate 55a is formed in an undercut shape as described above.

Therefore, the primary molded body is pulled by the pick-up roller 54, and the hemispherical primary hook portion of the temporary element formed in the cavity is lifted from the lower surface of the primary hook portion by the above-mentioned edge portion 60 formed on the first plate 55a. Compressed by pressing on the side. At this time, since the die wheel 52 rotates in the machine direction, the primary hook also receives an external force that is twisted in the machine direction by the edge portion 60 of the first plate 55a. Thereby, as in the case of the first embodiment described above, a smooth and relatively hard compression surface 82 is formed on the lower surface of the primary hook.

And, when the primary hook portion is pulled out from the first cavity 56, the primary hook portion is pressed by the edge portion 60 while receiving an external force from the edge portion 60 of the first plate 55a, so that the primary hook portion moves toward the hook from the primary rod portion. The top end is inclined upward or deformed in a curved manner as a whole, and is deformed into an asymmetrical shape in the M direction.

The primary molded body peeled off from the die wheel 52 is then introduced between the upper side nip roll 54 a and the lower side nip roll 54 b of the pick-up roll 54 to be nipped. At this time, the upwardly deformed primary hook portion of the temporary element is pressed from above by the upper side nip roller 54a. Thereby, the primary hook portion deformed so as to tilt upward can be forcibly (positively) plastically deformed downward so that the primary hook portion faces the C direction. Thus, the primary molded body of Example 3 was produced. The primary molded body of the present Example 3 produced at this time has the same structure (structure) as that of the molding surface connector 1 of the aforementioned Example 1 shown in FIG. 1 .

That is, the primary molded article of Example 3 has a base material part 10 and a plurality of temporary elements (engaging elements 20 of Example 1) erected on the base material part 10 . In addition, the temporary element has: a primary rod portion (the rod portion 21 of Embodiment 1) standing up from the base material portion 10; and a primary hook portion (the hook portion 31 of Embodiment 1) extending from the upper end of the primary rod portion. The part protrudes along the C direction. Also, a step is formed between the primary stem portion and the primary hook portion of the temporary element so that the upper surface of the primary hook portion is higher than the upper surface of the primary stem portion.

Next, the above-mentioned primary molded body (molding surface connector 1 of Example 1) obtained by the pick-up roller 54 is conveyed toward the heating and pressing device 91 for performing the secondary molding process, and is moved to the upper side of the heating and pressing device 91. It is introduced between the pressing roller 91a and the lower side pressing roller 91b. Moreover, the primary molded body passes between the upper side pressing roller 91a and the lower side pressing roller 91b, so that the upper end of the primary rod portion and the upper end portion of the primary hook portion in the temporary element (that is, in the engaging element 70 of Embodiment 1) The upper end portion of the rod portion 71 and the upper end portion of the hook portion 81) are heated and softened by the upper pressing roller 91a, and are pressed from above to be crushed.

By performing such a secondary forming process, the tip of the hook portion 81 can be bent further downward than before performing the secondary forming process. In addition, the upper end portion of the primary shaft portion and the upper end portion of the primary hook portion of the primary molded body are thermally deformed so as to be flattened while being expanded, and the upper surface 76a of the shaft head portion 76 and the upper surface 85a on the base end side of the hook portion 81 formed as a single flat surface. Also, a pair of reinforcing ribs 84 of the hook portion 81 are formed.

Thus, the engaging element 70 of the third embodiment shown in FIGS. 18 to 22 is molded, and thus the molded surface connector 3 of the third embodiment shown in FIG. 18 is manufactured. Thereafter, the molding surface connector 3 that is long in the machine direction through the heating and pressing device 91 is conveyed toward a cutting unit (not shown), cut into a predetermined length by the cutting unit, and recovered. Alternatively, the elongated molding surface connector 3 is directly wound up in a roll shape on a recovery roll or the like to be recovered.

The molding surface connector 3 of Example 3 manufactured as described above has a rod portion 71 erected thickly from the base portion 10 and a minute hook portion 81 protruding from the upper end of the rod portion 71 along CD. Moreover, the hook tip portion 86 of the hook portion 81 of the engaging element 70 is formed to be inclined downward, and when the hook portion 81 of the engaging element 70 is viewed from the C direction (see FIG. 21 ), the hook portion 81 is formed so that 81 is asymmetrical in the width direction (M direction). The engaging element 70 of the third embodiment provided with such a hook portion 81 has a characteristic form completely different from the conventional J-shape, palm tree shape, and mushroom shape. The nature of the feature.

Specifically, in the molded surface connector 3 of the third embodiment, the stem portion 71 of the engaging element 70 is formed thick, so the strength of the stem portion 71 can be increased. Therefore, the forming surface connector 3 of the present embodiment 3 is the same as the case of the aforementioned embodiment 1, and the ring of the female profile connector 3 can be easily hooked on the engaging element 70 of the forming surface connector 3 so that both snaps together securely. Moreover, since the rod portion 71 has high strength, the shear strength of the forming surface connector 3 relative to the female surface connector can be increased.

In addition, in the engaging element 70 of the third embodiment, the very small hook portion 81 protrudes from the upper end portion of the rod portion 71 in the left-right direction (CD), and the hook tip portion 86 is arranged obliquely downward. Furthermore, the lower surface of the hook portion 81 of the engaging element 70 partially has the compression surface 82 formed smoother than the upper surface of the hook portion 81 as described above. In addition, the hook main body portion 83 has a shape that becomes thinner as it gets away from the rod portion 71 .

Therefore, in the forming surface connector 3 of the present embodiment 3, the ring is easily hooked on the hook portion 81 of the engaging element 70, and in addition, the hooked ring is difficult to be disengaged from the engaging element 70, so it can be stably Higher peel strengths are obtained relative to the female profile connector.

Furthermore, in the engaging element 70 of the third embodiment, the upper surface 76 a of the head portion 76 of the rod portion 71 and the upper surface 85 a on the base end side of the hook portion 81 are formed parallel to the upper surface of the base material portion 10 . continuous flat surface. In addition, the upper surface 76a of the head portion 76 and the upper surface 85a on the base end side of the hook portion 81 are exposed to the upper side of the forming surface connector 3 over a large area. Thereby, it is possible to stably obtain a good skin feel and good contact comfort when touching the molding surface connector 3 from the upper surface side.

The forming surface connecting member 3 of the present embodiment 3 having the characteristics as above is particularly suitable for use in, for example, disposable diapers, diaper panties for infants, protective devices for protecting joints of hands and feet, waist corsets, and gloves. Wait for any product that can be disassembled relative to the body. Furthermore, the new molding surface connector 3 of the present embodiment 3 is provided by being added to the conventional molding surface connector, and the variation of the molding surface connector can be increased. As a result, it becomes easy to cope more appropriately with various types of female profile connectors (nonwoven fabrics).

In addition, the forming surface connector 3 of the third embodiment is manufactured by using the forming device 51 and the pick-up roller 54 in the manufacturing process of the forming surface connector 3 to produce The primary molded body having the same structure (structure) as the molding surface connector 1 (refer to FIG. 1 ) of Example 1, and then press the obtained primary molded body to the upper side of the heating and pressing device 91 to press the roller 91a and the lower side between the pressing rollers 91b.

However, in this third embodiment, the primary molded body passing between the upper nip roller 54a and the lower nip roller 54b of the pick-up roller 54 may not be the molding surface connector 1 of the aforementioned first embodiment. Instead, it is a molding surface connector having the same structure (structure) as the molding surface connector 2 (see FIG. 13 ) of the aforementioned Example 2. As shown in FIG.

By introducing such a primary molded body (that is, the molded surface connector 2 of Example 2) into the heating and pressing device 91 to perform the above-mentioned secondary molding process, it is also possible to manufacture the base material part 10 vertically provided with the same structure as in this embodiment. The engaging element 70 described in Example 3 is a molded surface connector of a plurality of engaging elements having substantially the same structure (structure). The thus-manufactured molding surface connector is a modified example of the third embodiment, and the same effects as those of the molding surface connector 3 of the third embodiment shown in FIGS. 18 to 22 can be obtained.

In addition, in the above-mentioned embodiment 1 to embodiment 3, each engaging element of the forming surface connector has a rod portion and a hook portion protruding from the rod portion along the cross direction (CD). explained. However, in the present invention, a plurality of hook portions may be protrudingly arranged for one rod portion of the engaging element.

Here, for example, a modified example of Embodiment 1 will be specifically described with reference to the drawings. FIG. 24 shows an engaging element 20c according to a modified example of the first embodiment. The engaging element 20c in FIG. 24 has a stem portion 21c standing up from the base portion 10 and two hook portions 31 protruding from the upper end portion of the stem portion 21c in the same direction in the crossing direction.

Although the rod part 21c of this modification has the same shape as the rod part 21 of the said Example 1, it is formed larger than the rod part 21 of the said Example 1. As shown in FIG. That is, the lever portion 21c of the modified example has a similar relationship with the lever portion 21 of the first embodiment described above. In addition, the two hooks 31 of the modified example are each formed in the same shape and the same size as the hooks 31 of the first embodiment described above.

In addition, in FIG. 25, the engaging element 20d of another modification of Example 1 is shown. The engagement element 20d of FIG. 25 has a stem portion 21d standing up from the base portion 10 and two hook portions 31 protruding from the upper end portion of the stem portion 21d in a crossing direction. In addition, the hook portion 31 protrudes from the pole portions 21d in directions opposite to each other in the intersecting direction.

In the rod portion 21d of this other modified example, the rod back surface 25 as in the first embodiment described above is not formed, and the flat hook arrangement surfaces 24 are arranged on the left and right sides of the rod portion 21d. In addition, when the engaging element 20d is viewed from the cross direction (CD), the stem portion 21d of this other modified example has the same shape as the stem portion 21 of the first embodiment described above.

In addition, in this engaging member 20d, the two hook portions 31 have shapes symmetrical to each other. In this case, one hook portion 31 is formed in the same shape, the same size, and the same orientation as the hook portion 31 of Embodiment 1 described above.

The present invention also includes a molding surface connector in which a plurality of engaging elements 20c, 20d having one rod portion 21c, 21d and two hook portions 31 are erected on the base portion 10 as in the above two modified examples. . In the molding surface fasteners of these modified examples, a peel strength higher than that of the molding surface fastener 1 of Example 1 described above was obtained. In addition, in the molding surface fastener of such a modified example, the effects other than the peeling strength in the molding surface fastener 1 of the above-mentioned Example 1 are similarly obtained. Such an engaging element configured with a plurality of hooks on one shank can be applied not only to the forming surface connector 1 of Embodiment 1, but also to the forming surface connector 2 of Embodiment 2 and the forming surface connector 2 of Embodiment 3. Forming surface connector 3.

In addition, in the above-mentioned Embodiment 1 to Embodiment 3, the case where the forming process or the primary forming process of forming the surface connector is performed using the forming apparatus 51 having the die wheel 52 has been described. However, in the present invention, other types of molding devices can also be used in the molding step of molding the surface connector or in the primary molding step.

For example, as the forming device used in the forming process or the primary forming process, for example, a forming device of a modified example can be used. The forming device of the modified example has: a die wheel 52 driven to rotate in one direction; The die wheels 52 are arranged at predetermined intervals and driven to rotate in a direction opposite to the die wheels 52 ; and an extrusion nozzle extrudes molten synthetic resin material between the die wheels 52 and the pinch wheel.

In this case, the die wheel 52 of the molding apparatus of the modified example has the same structure as the die wheel 52 described in the above-mentioned first embodiment and the like. In addition, in the molding apparatus of the modified example, a pick-up roller 54 for forcibly peeling a molding surface connector or a primary molded body from the die wheel 52 as shown in FIG. 8 is arranged on the downstream side of the die wheel 52 .

The manufacturing process of the molded surface connector is performed using a molding device of a modified example having such a die wheel 52 and a pinch roller, and it is possible to stably manufacture the present invention as described in the above-mentioned Embodiments 1 to 3, etc. The forming surface connector.

Explanation of reference signs

1, 1a, forming surface connecting piece; 2, 3, forming surface connecting piece; 10, substrate part; 20, 20a, engaging element; 20b, 20c, engaging element; 20d, engaging element; 21, rod ; 21c, 21d, rod portion; 22, base end portion; 23, rod main body portion; 24, hook arrangement surface; 25, rod back; ; 26, step (step); 31, 31b, hook; 32, compression surface; 33, top end of hook; 34, hook top surface; 50, manufacturing device; 51, forming device; 52, mold wheel; 53, extrusion nozzle; 54, pick-up roller; 54a, upper pinch roller; 54b, lower pinch roller; 55, metal plate; 55a, first plate; 55b, second plate; 55c, third plate; 56. First cavity; 57. Second cavity; 58. Auxiliary cavity; 59. Step; 60. Edge; 70. Engagement element; 71. Rod; 72. Base end; 74, hook arrangement surface; 75, rod back; 75a, upper side curved surface; 75b, lower side curved surface; 75c, inclined surface; 75d, upper back part; 76, rod head; 81, hook portion; 82, compression surface; 83, hook main body portion; 84, reinforcing rib; 85, upper surface of hook portion (hook upper surface); 85a, base end side upper surface; 85b, top 86, the top end of the hook (hook top end); 87, the top end; 90, the manufacturing device; 91, the heating and pressing device; 91a, the upper side pressing roller; 91b, the lower side pressing roller; D1, and Dimensions in the direction of the rotation axis between the first lamination surface of the first plate and the cavity surface of the second cavity of the second plate at positions adjacent to the radially outer side of the first cavity; D2, the first mold Dimensions in the direction of the rotation axis between the cavity surface at the deepest position from the first stacking surface of the cavity and the cavity surface of the second cavity of the second plate; H1, the maximum height dimension of the engaging element; H2, the rod The maximum height dimension of the part; H3, the height dimension of the step; H4, the height dimension of the top end of the hook; L1, the maximum dimension of the M direction in the rod; L2, the maximum dimension of the M direction in the hook; L3, The dimension of the stem in the M direction at the lower end of the hook; W1, the maximum dimension of the stem in the C direction; W2, the maximum dimension of the hook in the C direction; W3, the hook between the lower end of the hook and the stem Dimensions of a line segment parallel to the C direction between the arrangement surfaces (dimensions in the C direction at the position of the lower end of the rod portion at the hook portion).

Claims (26)

1. A molding surface connector, which is a molding surface connector (1, 1a, 2, 3) made of synthetic resin, and the molding surface connector (1, 1a, 2, 3) has: a base part (10 ), which is formed into a flat plate extending along a first direction and a second direction intersecting the first direction, and is elongated in the first direction; and a plurality of engaging elements (20, 20a, 20b . , 21d, 71), which stand up from the base portion (10); and at least one hook portion (31, 31b, 81), which rises from the upper end of the rod portion (21, 21c, 21d, 71) The portion protrudes along the second direction, and the forming surface connector is characterized in that, The hook portion (31, 31b, 81) has a tapered shape in which the dimension in the first direction gradually decreases toward the hook tip of the hook portion (31, 31b, 81), The lower surface of the hook portion (31, 31b, 81) partially has a compression surface (32, 82) formed smoother than the upper surface of the hook portion (31, 31b, 81). 2. The forming surface connector of claim 1, wherein: The upper surface of the hook portion (31) is arranged higher than the upper surface of the rod portion (21, 21c, 21d) by a step (26), The hook portion (31) has the following shape: when viewing the engaging element (20, 20c, 20d) from the first direction, the upper surface of the hook portion (31) is convex, and the hook The lower surface of the portion (31) is non-convex. 3. The forming surface connector of claim 1, wherein: A part of the upper surface of the hook portion (31b) is continuously formed from the upper surface of the rod portion (21), The hook portion (31b) has the following shape: when viewing the engaging element (20b) from the first direction, the upper surface of the hook portion (31b) is convex, and the hook portion (31b) The lower surface is non-convex. 4. A forming surface connector according to claim 2 or 3, wherein, The outer surface of the upper end portion of the rod portion (21, 21c, 21d) is formed into a spherical surface. 5. The forming surface connector of claim 1, wherein: The upper surface of the hook portion (81) and the upper surface of the rod portion (71) are formed as a single flat surface, The tip end of the hook (81) is arranged inclined downward. 6. The forming surface connector of claim 5, wherein: The engaging element (70) has a pair of reinforcing ribs (84), and the pair of reinforcing ribs (84) are arranged on both sides of the hook (81) in the first direction, connecting the hook The upper end of the part (81) and the rod part (71). 7. The molding surface connector according to any one of claims 1 to 6, wherein: When viewing the hook portion (31, 31b, 81) from the second direction, the hook portion (31, 31b, 81) is formed in the width direction of the hook portion (31, 31b, 81). asymmetrical. 8. A molding surface connector, which is a molding surface connector (1, 1a, 2, 3) made of synthetic resin, and the molding surface connector (1, 1a, 2, 3) has: a base part (10 ), which is formed into a flat plate extending along a first direction and a second direction intersecting the first direction, and is elongated in the first direction; and a plurality of engaging elements (20, 20a, 20b . , 21d, 71), which stand up from the base portion (10); and at least one hook portion (31, 31b, 81), which rises from the upper end of the rod portion (21, 21c, 21d, 71) The portion protrudes along the second direction, and the forming surface connector is characterized in that, The hook portion (31, 31b, 81) has a tapered shape in which the dimension in the first direction gradually decreases toward the hook tip of the hook portion (31, 31b, 81), When viewing the hook portion (31, 31b, 81) from the second direction, the hook portion (31, 31b, 81) is formed in the width direction of the hook portion (31, 31b, 81). asymmetrical. 9. The forming surface connector of claim 8, wherein: The lower surface of the hook portion (31, 31b, 81) partially has a compression surface (32, 82) formed smoother than the upper surface of the hook portion (31, 31b, 81). 10. A forming surface connector according to claim 7 or 9, wherein, One end portion of the compression surface (32, 82) of the hook portion (31, 31b, 81) in the first direction is arranged on the other end of the compression surface (32, 82) in the first direction. high position, When viewing the engaging elements (20, 20a, 20b, 20c, 20d, 70) from above, the top ends of the hooks (31, 31b, 81) are arranged opposite to the rods (21, 21c). , 21d, 71) is a position deviated from the center position in the first direction toward the one end side in the first direction. 11. The forming surface connector according to any one of claims 7 to 10, wherein: When viewing the hook portion (31, 31b, 81) from the first direction, the radius of curvature at the tip of the hook portion (31, 31b, 81) is set to be 0.06 mm or more and 0.18 mm or less. In the range. 12. The forming surface connector according to any one of claims 1 to 11, wherein: One hook portion (31, 31b, 81) is arranged for one rod portion (21, 71), The rod portion (21, 71) has a hook placement surface (24, 74) standing up from the base portion (10) and disposed toward a protruding direction of the hook portion (31, 31b, 81), The hook placement surface (24, 74) has a single flat surface formed from a position below the hook portion (31, 31b, 81) toward the base portion (10), and It is perpendicular to the upper surface of the base part (10) and perpendicular to the second direction. 13. The forming surface connector of claim 12, wherein: When the engaging element (20, 20a, 20b, 70) is viewed from the first direction, the rod portion (21, 71) has a structure arranged on the hook arrangement surface ( 24, 74) on the opposite side of the rod back (25, 75), the rod back (25, 75) has the rod portion (21, 71 ) in a shape of decreasing size between the hook arrangement surface (24, 74) and the rod back surface (25, 75). 14. The forming surface connector of claim 13, wherein: When the engaging element (20, 20a, 20b, 70) is viewed from the first direction, the rod back surface (25, 75) has an upper end disposed convexly on the rod portion (21, 71) The upper side curved surface (25a, 75a) of the upper part and the lower side curved surface (25b, 75b) which are concavely arranged at the lower end of the rod part (21, 71). 15. The forming surface connector of claim 14, wherein: When viewing the engaging element (20, 20a, 20b, 70) from the first direction, the hook portion (31, 31b, 81) has the following shape: the hook portion (31, 31b, 81) The upper surface of the rod portion (21, 71) has a convex shape having a radius of curvature smaller than that of the upper curved surface portion (25a, 75a) of the rod portion (21, 71). 16. The forming surface connector according to any one of claims 1 to 15, wherein: The maximum dimension of the rod portion (21, 21c, 21d, 71) in the second direction is set to be 0.1 mm or more and 1.5 mm or less, A maximum protrusion dimension of the hook portion (31, 31b, 81) in the second direction protruding from the rod portion (21, 21c, 21d, 71) is set to be 0.01 mm or more and 0.5 mm or less. 17. A method of manufacturing a molding surface connector, which is a method of manufacturing a molding surface connector (1, 1a, 2) made of synthetic resin, the molding surface connector (1, 1a, 2) having: a flat plate shape A substrate part (10), which is formed lengthwise along the machine direction; and a plurality of engaging elements (20, 20a, 20b, 20c, 20d), which are erected on the substrate part (10) Surface, the manufacturing method of the shaped surface connector is characterized in that, The manufacturing method of the forming surface connector comprises: A forming device (51) having a die wheel ( 52), said mold cavity has an undercut shape in which said engaging element (20, 20a, 20b, 20c, 20d) formed in said mold cavity cannot be ejected in a manner that maintains its shape, and The cavity surface of the mold cavity is provided with a device capable of aligning the engaging elements (20, 20a, 20b, 20c, 20d) when the engaging elements (20, 20a, 20b, 20c, 20d) are pulled out. A part of the edge portion (60) that is locally pressed and compressed; The molten synthetic resin material is continuously extruded to the outer peripheral surface of the die wheel (52) to form the base material part (10) on the outer peripheral surface of the die wheel (52), and the The engaging elements (20, 20a, 20b, 20c, 20d) are formed in the mold cavity of the mold wheel (52), and the engaging elements (20, 20a, 20b, 20c, 20d) have : a stem part (21, 21c, 21d), which stands up from the base part (10); and at least one hook part (31, 31b), which rises from the stem part (21, 21c, 21d) the upper end protrudes along a crossing direction crossing the machine direction; and Forcibly pull out the engaging elements (20, 20a, 20b, 20c, 20d) from the mold cavity and use the edge part (60) to align the hook parts (31, 31b) from below Press and compress the hook portion (31, 31b), and use the edge portion (60) to wipe the hook portion (31, 31b) from below the hook portion (31, 31b), so that the The lower surface of the portion (31, 31b) partially forms a compression surface (32). 18. The method of manufacturing a shaped surface fastener according to claim 17, wherein: The manufacturing method of the forming surface connector comprises: Using the pick-up roller (54) arranged on the downstream side of the forming device (51) and having a pair of rollers, an upper nip roller (54a) and a lower nip roller (54b), the formed said forming face connector is peeled from said die wheel (52); and After the forming surface connector is peeled off from the die wheel (52), the engaging elements (20, 20a, 20b, 20c, 20d) are pressed by the upper pinch roller (54a), Thereby, the hook portion (31, 31b) pulled out from the cavity and directed obliquely upward is plastically deformed. 19. The method of manufacturing a shaped surface fastener according to claim 17 or 18, wherein: The manufacturing method of the shaped surface connector includes forming the upper surface of the hook portion (31, 31b) higher than the upper surface of the stem portion (21, 21c, 21d) by means of a step (26). 20. A method of manufacturing a molding surface connector, which is a method of manufacturing a molding surface connector (3) made of synthetic resin, the molding surface connector (3) having: a flat base portion (10), It is formed lengthwise along the machine direction; and a plurality of engaging elements (70), which are erected on the upper surface of the base part (10), the manufacturing method includes: a forming process, in the forming process wherein, forming a primary molded body having the base material portion (10) and a plurality of temporary elements erected on the base material portion (10); and a secondary forming process, in which, heating said temporary element of said primary forming body and crushing said temporary element from above to shape said forming surface connector (3) with said engaging element (70), the The method of manufacturing a forming surface connector is characterized in that, The manufacturing method of the forming surface connector comprises: In the primary forming process, a forming device (51) is used, and the forming device (51) has a die wheel (52) having a plurality of cavities formed on the outer peripheral surface with a shape corresponding to the temporary element, so The mold cavity has an undercut shape in which the temporary element formed in the mold cavity cannot be molded without maintaining its shape, and the cavity surface of the mold cavity is equipped with a an edge portion (60) capable of locally pressing and compressing a part of the temporary element when pulled out, The molten synthetic resin material is continuously extruded to the outer peripheral surface of the die wheel (52) to form the base material part (10) on the outer peripheral surface of the die wheel (52), and the said temporary element is shaped within said mold cavity of said mold wheel (52), said temporary element having: a primary stem portion standing up from said base material portion (10); and at least 1 primary hook a portion protruding from an upper end portion of the primary rod portion in an intersecting direction intersecting the machine direction; and The temporary element is forcibly pulled out from the mold cavity, and the primary hook is pressed and compressed by using the edge portion (60) from below the primary hook portion, and using the edge portion ( 60) Rubbing the primary hook portion from below the primary hook portion, thereby locally forming a compression surface (82) on the lower surface of the primary hook portion. 21. The method of manufacturing a shaped surface fastener according to claim 20, wherein: The manufacturing method of the forming surface connector comprises: In the primary forming process, a pick-up roll (54) that is arranged on the downstream side of the forming device (51) and has a pair of upper pinch rolls (54a) and lower pinch rolls (54b) is used. ), peeling the formed primary form from the die wheel (52); and After the primary form is peeled from the die wheel (52), the temporary element is pressed by the upper pinch roller (54a) so that it is pulled out from the cavity toward the oblique The upper primary hook portion is plastically deformed. 22. The method of manufacturing a shaped surface fastener according to claim 20 or 21, wherein: The manufacturing method of the forming surface connector comprises: In the primary forming process, an upper surface of the primary hook portion is formed higher than an upper surface of the primary stem portion by a step; and In the secondary forming process, the upper surface of the hook portion (81) and the upper surface of the rod portion (71) in the engaging element (70) are compressed by crushing the upper end portion of the temporary element from above. The upper surface is formed as a single flat surface. 23. A forming device, which is a forming device (51) used for forming a forming surface connector (1, 1a, 2) or forming a primary forming body of a forming surface connector (3), having: a die wheel ( 52), which is driven to rotate in one direction; and an extrusion nozzle (53), which extrudes the molten synthetic resin material toward the die wheel (52), and the forming device (51) is characterized in that, The outer peripheral surface of the die wheel (52) is provided with engaging elements (20, 20a, 20b, 20c, 20d) with the forming surface connectors (1, 1a, 2) or the primary forming body. multiple cavities of the shape corresponding to the temporary element, The mold cavity has an undercut where the snap-fit element (20, 20a, 20b, 20c, 20d) or the temporary element formed in the mold cavity cannot be ejected in a manner that maintains its shape shape, The die wheel (52) has a plurality of disc-shaped metal plates (55) stacked axially, Each metal plate (55) has a first lamination surface and a second lamination surface perpendicular to the axial direction, The second lamination surface of the metal plate (55) is arranged on the opposite side to the first lamination surface, The metal plate (55) has: a plurality of first plates (55a), which are concavely provided with hooks ( 31, 31b) or the first mold cavity (56) for forming the primary hook portion of the primary molded body; and a plurality of second plates (55b), which are concavely provided with The second mold cavity (57) for forming the rod portion (21, 21c, 21d) of the element (20, 20a, 20b, 20c, 20d) or the primary rod portion of the primary molded body, The first plate (55a) and the second plate (55b) are stacked adjacent to each other in a direction in which the first cavity (56) and the second cavity (57) communicate, The first mold cavity (56) is recessed at a position separated from the outer peripheral end surface of the first plate (55a) with a size to form the undercut shape, The second cavity (57) is continuously recessed radially inward from the outer peripheral end surface of the second plate (55b). 24. The forming apparatus of claim 23, wherein: The radially innermost position in the first cavity (56) is located radially inward of the radially innermost position in the second cavity (57), and the first cavity A step (59) formed by the second lamination surface of the second plate (55b) is formed between (56) and the second cavity (57). 25. A forming apparatus according to claim 23 or 24, wherein: The first mold cavity (56) is recessed in the first lamination surface of the first plate (55a) in a hemispherical shape, The radius of the hemispherical shape of the first cavity (56) is set to not less than 0.01 mm and not more than 0.5 mm. 26. The forming apparatus according to any one of claims 23 to 25, wherein: The second cavity (57) has a shape in which the size of the second plate (55b) in the circumferential direction gradually decreases from the outer peripheral end surface of the second plate (55b) toward the radially inner side, A radially inner tip surface of the second cavity (57) has a spherical surface having a curvature radius of not less than 0.01 mm and not more than 0.5 mm.