JP2015231431A - Chair with shelf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair with a shelf, capable of being restored even if the shelf arranged at feet receives an external force such as being stepped on intentionally or unintentionally, and reducing the possibility of causing damage such as breakage and bend.SOLUTION: In a chair including a leg comprising a bottom leg part of two facing sides arranged along a floor face, a shelf 5 formed of a flexible synthetic resin so as to extend across bottom leg parts 4a is arranged while separated from the floor face. The shelf 5 and the bottom leg part 4a are fixed while having a bend allowance enabling the shelf 5 to be bent.

Description

  The present invention relates to a chair. More specifically, the present invention relates to a chair provided with a shelf on which a luggage such as personal belongings is placed at the bottom of a leg.

  Conventionally, there is a chair provided with a shelf that allows a luggage to be placed under a seat. For example, there is a chair provided with a metal wire container (such as a basket) called a chair rack that is hooked on a horizontal rail just below the seat (that is, the upper part of the leg) (see Patent Document 1). .

  There is also a wooden chair that is placed on the bottom of the leg near the foot by hooking a rectangular synthetic resin tray on four crossing bars crossed in front, rear, left, and right (see Patent Document 2). This synthetic resin tray is provided with supported edges of a semicircular cross-sectional shape projecting outward at the upper edge of the rising edge of the peripheral edge, and these supported edges are connected to the bottom of the legs near the feet of the chair. It is placed on the upper surface of a crossbar disposed on the front, rear, left and right provided in the section so as to be supported respectively. Two opposite sides of the four rising parts are provided with tongue-like elastic locking pieces curved so as to protrude outward from the middle of the rising part at a position lower than the supported edge part. The crossing of the crosspieces is made possible by elastic deformation narrowing to the inside of the elastic locking piece and restored to the original state after passing the crosspieces to prevent the crosspieces from passing back. In other words, the tray cannot be easily removed unless the unlocking operation of pushing the tongue-like elastic locking piece inward with a finger is performed.

Utility Model Registration No. 3043368 No. 7-51000

  However, in the case of the invention described in Patent Document 1, since the shelf is provided in the space immediately below the seat, the opening for taking in and out of the baggage is narrowed, and the size of the baggage to be stored is limited and difficult to use. It will be a thing. On the other hand, if a shelf is placed near the bottom of the foot so that the space above the shelf, that is, the height and space up to the seat, is taken, the size of the luggage to be placed is less limited, but the foot There is a possibility that it will be inadvertently stepped on because there is a shelf. For this reason, the wire shelves and baskets are deformed and cannot be restored. Further, even in the case of a shelf made of synthetic resin, in a structure in which only both sides are hooked and supported by a crosspiece, there is a high possibility that a break or a crack will occur due to an external force, and there is a possibility that the shelf will be damaged.

  In the case of the invention of Cited Document 2, not only the left and right rails constituting the legs but also the rails for supporting the trays must be provided at the front and rear, which increases the labor and number of parts for assembly and leads to high costs. Furthermore, because the tray is supported and supported by four crosspieces that are orthogonal to each other structurally, the design is restricted such that the design of the space between the tray and the legs under the seat is limited to a rectangular shape. Furthermore, weight reduction as a chair cannot be expected due to an increase in the number of parts. In addition, since the front edge of the tray is received and supported by the crosspiece spanned by the front leg, even if the seated person wants to retract the foot tip backward from the front edge of the seat, it is not possible to pull it in, and the position where the foot is placed is restricted. If the seated person pulls his / her foot at the same time, there is a problem that the shoes placed on the shelf are stepped on and soiled.

  Accordingly, an object of the present invention is to provide a chair with shelves that is restored even when subjected to an external force such as deliberately or inadvertently stepped on and is less likely to be broken or broken.

  In order to achieve such an object, the invention described in claim 1 is a chair including legs having two bottom leg portions arranged opposite to each other along a floor surface so as to straddle the bottom leg portion. A shelf made of a flexible synthetic resin is placed away from the floor surface, and the shelf and the bottom leg are fixed so that the shelf has a bending allowance that can be deformed. ing.

  Here, the connection between the shelf and the bottom leg is preferably fixed so as to be displaceable so as to sandwich the bottom leg between the connection member and the shelf. Further, the connection between the shelf and the bottom leg may be directly attached to the bottom leg so that the edge of the shelf can slide in the lateral direction.

  In the present invention, at least one of the connecting member and the shelf is formed with a long hole whose longitudinal direction is arranged in a direction crossing between the pair of bottom leg portions. It is preferable that the means for connecting the bottom leg penetrates and the shelf is supported so as to be movable in a direction crossing between the bottom legs.

  Further, in the present invention, the connecting member is provided with at least two hemispherical concave portions having through holes in the bottom portion, and cylindrical bosses that fit into the concave portions are provided on the back side of the shelf, through the through holes of the concave portions. It is preferable that the shelf is connected so as to be swingable in the recess by screwing a screw for connecting the connecting member and the shelf into the boss.

  In the present invention, the bottom leg portion of the leg is arranged in the longitudinal direction in the front-rear direction, and the distance between the pair of left and right bottom leg portions is preferably wider at the rear than at the front.

  Moreover, in this invention, it is preferable that the shelf is formed so that back may bend easily with respect to the front.

  In the present invention, it is preferable that the shelf has a bottom inclined forward from the rear to the front, deep at the front, and shallow at the rear.

  Moreover, in this invention, it is preferable that the shelf is provided with the opening part which promotes bending deformation.

  Further, in the present invention, the bottom leg portion of the leg is arranged in the longitudinal direction in the front-rear direction, and the space between the pair of left and right bottom leg portions is wider at the rear than the front, while the shelf is the bottom leg. The rear edge is located at the rear end of the bottom leg, and the space for allowing the feet to be retracted in front of the front edge is rearward compared to the front. It is preferable that the rear side is formed to be easily bent with respect to the front side, the bottom surface is inclined forward from the rear side to the front side, the front side is deep, and the rear side is shallow.

  In the chair with a shelf according to claim 1, since the shelf can be arranged on the bottom leg portion (leg bottom portion) near the feet and the space above the shelf, that is, the height and space up to the seat can be taken widely, There is little restriction on the size, and the frontage for taking in and out the baggage is widened, so that the baggage can be taken in and out easily and easy to use.

  Also, even if it is inadvertently stepped on due to the presence of a shelf underneath it, it will be deformed by a wire shelf or basket and will not return to its original state, but it is a flexible synthetic resin shelf. Since the plate is fixed with a bending allowance that can be bent and deformed, the external force is applied by the bending of the resin that constitutes the shelf and the movement of the connecting position, so that the shelf may be damaged (folded or broken). It is possible to restore it when the external force is released. That is, according to the chair with a shelf of the present invention, even if the shelf is intentionally or inadvertently stepped on, it is fixed with a bending allowance that can be positively bent and deformed. Breakage such as cracks can be avoided and can be restored when the external force is released.

  Further, since the shelf is supported by the bottom leg portions of the two opposite sides arranged along the floor surface, the invention described in the cited document 2 in which the crosspieces for supporting the shelf must be provided on the four sides of the front, rear, left and right. In contrast, it is possible to reduce the number of parts, reduce the time and effort of assembly, and reduce costs.

  Furthermore, since the structure is not a structure that supports the shelf by four side bars orthogonal to each other, the design of the shelf and the leg is not limited to a rectangular shape, and there are few design restrictions. Furthermore, weight reduction as a chair can be expected by reducing the number of parts for supporting the shelf.

  According to the second aspect of the present invention, the connection between the shelf and the leg frame is fixed so that the leg frame is sandwiched between the connection member and the shelf, so that when the external force such as a stepping force is applied to the shelf, the connection member The shelf can be moved radially outside the leg frame while rotating around the leg frame with the leg frame sandwiched therebetween, and by expanding the space between the connecting member and the shelf to widen the sandwich state of the leg frame. Therefore, it is possible to deform until the shelf touches the floor. Moreover, in the connection structure of the shelf and the leg frame according to the invention described in claim 5, when the shelf is stepped on, the shelf slides in the lateral direction with respect to the bottom leg portion, so that the shelf bends and deforms until the shelf contacts the floor. be able to.

  According to the invention of claim 3, since the shelf and the leg frame are connected by the connecting means that penetrates the long hole whose longitudinal direction is arranged in a direction crossing between the pair of bottom legs, the shelf is When it is stepped on, both sides of the shelf are pulled inward and move, promoting the deflection of the shelf.

  According to the invention described in claim 4, since the cylindrical bosses on the back side of the shelf are slidably connected within the hemispherical concave portion of the connecting member, the inclination of the shelf plate like a pivot bearing is possible. And assists in flexibility and promotes bending of the shelf.

  According to the invention described in claim 6, since the rear of the pair of left and right bottom legs is wider than the front, the positioning of the shelf installed so as to straddle between the bottom legs. This is easy because it is determined automatically. In addition, since the front opening on the rear side of the leg is widened, it is easy to take in and out the luggage from the rear of the chair.

  According to the seventh aspect of the invention, the shelf board is rigid on the front side and easily bent on the rear side, so that the rear side is more easily bent than the front side. It is easy and the rigidity is high on the front side where luggage can be easily gathered.

  According to the eighth aspect of the present invention, since the shelf plate is tilted forward from the rear to the front so that the front is deep and the rear is shallow, the loaded luggage slides forward and is difficult to fall.

  According to the ninth aspect of the present invention, since the shelf is provided with the opening, the rigidity is lowered and it is easy to bend. In addition, liquids such as water and garbage do not collect, and the weight can be reduced.

  In addition, according to the invention described in claim 10, since the space is provided in which the foot can be retracted in front of the shelf under the seat, the tip of the foot can be retracted behind the front edge of the seat. In addition, when the seated person pulls his / her foot in, he / she does not get dirty by stepping on the luggage placed on the shelf with shoes.

It is a perspective view which shows one Embodiment which applied the chair with a shelf concerning this invention to the chair of a reverse cantilever type. It is a bottom view of the chair. It is a longitudinal cross-sectional view of the shelf part of the leg bottom part of the chair. It is a longitudinal cross-sectional view of the back seat support structure part of the chair. It is a partial expanded sectional view which shows one Embodiment of the attachment structure of the shelf with respect to a bottom part leg part. It is a partial expanded sectional view which shows other embodiment of the attachment structure of the shelf with respect to a bottom part leg part. It is a partial expanded sectional view which shows other embodiment of the attachment structure of the shelf with respect to a bottom part leg part. It is a partial expanded sectional view which shows one Embodiment of the structure which attaches a shelf directly with respect to a bottom leg part. It is a partial expanded sectional view which shows other embodiment of the structure where a shelf is directly attached with respect to a bottom leg part. It is a figure which shows one Embodiment of a shelf, (A) is a bottom view, (B) is a side view. It is a disassembled perspective view of the reverse cantilever type chair of FIG. It is a perspective view which decomposes | disassembles and shows the support structure of the seat receiving member of the reverse cantilever type chair of FIG. It is a longitudinal cross-sectional view which shows the connection structure of the back part and back frame of the body support member of the chair of FIG. It is a top view which shows the support structure of the seat receiving member of the reverse cantilever type chair of FIG. An example of a back seat fixed type is shown as another embodiment of a reverse cantilever type chair, and is an exploded perspective view of a seat receiving member and a leg. It is a side view showing an embodiment provided with a memo stand when the chair with a shelf according to the present invention is applied to an inverted cantilever type chair. It is a front view of the chair with the memo stand. It is a perspective view which shows one Embodiment which applied the chair with a shelf concerning this invention to the chair of 4 leg type.

  Hereinafter, the configuration of the present invention will be described in detail based on embodiments shown in the drawings.

  1 to 5 and 10 to 14 show an example of an embodiment of a chair according to the present invention. The chair of this embodiment is a leg-type chair called a reverse cantilever leg, and is provided with a shelf 5 at a position where it can be stepped on under the seat and near the legs. The inverted cantilever leg is formed by removing the front leg from the trapezoid, that is, the three sides of the upper base (seat receiving part 4b), the lower base (bottom leg part 4a), and the rear leg (rear leg part 4c). As a whole, it forms a U-shape. In this specification, the term “leg” is used to refer to the entire body that supports the back and the seat, and particularly includes a horizontal support portion that connects not only the vertical members but also the front and rear legs. It is used as a thing.

  Specifically, as shown in FIGS. 12 and 11, the reverse cantilever type leg 4 includes a pair of left and right legs formed by continuously bending a steel or stainless steel pipe, for example, a leg joint shaft 4e and It is assembled integrally by connecting with the leg joint member 4d between the rear legs. The pair of left and right legs are composed of a seat receiving portion 4b that is an upper bottom portion by continuously bending one pipe, a rear leg portion 4c, and a grounding portion that is a lower bottom portion that is disposed in parallel with the floor (hereinafter referred to as the bottom portion). (Referred to as a leg portion) 4a is formed in a substantially U shape when viewed from the side. Thus, a chair is provided that includes the legs 4 having the bottom leg portions 4a of the two opposite sides arranged along the floor surface, and the shelf 5 is arranged at a position to be stepped on near the feet of the legs under the seat. Is done. The pair of left and right legs of the leg 4, the leg joint shaft 4e, and the rear leg joint member 4d are integrated by welding. As shown in FIGS. 1 and 2, etc., the lower bottom portion of the leg 4, that is, the bottom leg portion 4a, is provided with casters 25 at the front end and the rear end thereof, and the bottom leg portion 4a is parallel to the floor surface. It is floated and supported, and is movably provided. The caster 25 is supported by a plastic caster receiver 26, and is fixed to the bottom leg portion 4a from below with screws 40 with a caster support fitting 27 interposed therebetween.

  In the case of the leg 4 of the present embodiment, as shown in FIGS. 1 and 2, the bottom leg 4a is arranged in the longitudinal direction in the front-rear direction, and the distance between the pair of left and right bottom leg 4a is larger than the front. The rear side (rear leg 4c side) is widely formed. Thereby, since the position where the substantially fan-shaped shelf 5 is disposed across the bottom leg portion 4a is uniquely determined, positioning when attaching the shelf to the leg 4 is facilitated. Moreover, since the frontage between the rear legs 4c is wide, it is easy to take in and out the luggage from the back of the chair. Of course, the distance between the pair of left and right bottom leg portions 4a may be constant, that is, parallel, or the front may be formed wider than the rear.

  Further, the shelf 5 is made of a flexible synthetic resin, for example, a thermoplastic synthetic resin such as polypropylene. In the case of the present embodiment, the shelf 5 has flexibility as a whole, but it is particularly preferable that the rear portion is formed so as to be easily bent with respect to the front. As shown in FIGS. 1 and 2, the shelf 5 in this embodiment is shorter than the length of the bottom leg 4a, the rear edge 5b is located at the rear end of the bottom leg 4a, and the front edge 5c. Since the shelf 5 is disposed in front of the shelf 5 so that the foot can be retracted, that is, the shelf 5 is installed on the rear side, the rear of the shelf 5 is easily stepped on. Further, as shown in FIG. 3, the shelf 5 forms a shallow box (tray) whose peripheral portion rises and becomes a wall, and has a bottom surface with respect to the left and right edges so that the front is deep and the rear is shallow. Is inclined toward the front, so that the load slides forward and is caught by a deep edge at the front and is difficult to fall. In addition, in the case of the present embodiment, the shelf 5 is formed in a curved shape in which the front end edge 5c and the rear end edge 5b are curved in the same direction (rearward) while forming a fan shape that is narrow at the front and wide at the rear according to the leg structure. Since it is formed, the central portion of the shelf 5 protrudes more backward in the rear of the chair. Therefore, in the shelf 5 of the present embodiment, it is preferable that the rear side is easily bent with respect to the front side. Specifically, by adjusting the thickness and height of the ribs formed along the front edge 5c and the rear edge 5b, or adjusting the depth of the rising wall, the front side has rigidity, and the rear The side is easy to bend. Of course, when there is a possibility of being stepped on the front side rather than the back side, for example, when installing a shelf between the leg blades of the rotating leg, the front side is easily bent and the rear side (back side) should be rigid. There is also. Moreover, the attachment position with respect to the bottom leg part 4a of the shelf 5 is not restricted to the thing of the illustration mentioned above, It arrange | positions in the whole region of the bottom leg part 4a or near the front, or the center (each is provided with the space at the front and back of a shelf). You may do it.

  Here, the shelf 5 is attached at a position where it is stepped on under the seat and near the feet of the leg and at a position separated from the floor surface. For example, it is preferable that the shelf 5 is attached at a position separated from the floor surface within a range in which the shelf 5 can be elastically deformed. For example, in the embodiment shown in FIGS. 1 and 3, when the caster 25 has a diameter of 50 mmφ and the pipe diameter is 25.4 mm, the upper surface of the shelf 5 is about 80 mm from the floor when the caster bracket 26 is included. In position. And since the thickness of the shelf 5 is about 20 mm, the lower surface of the shelf 5 is set to a position of about 60 mm from the floor surface. In the case of the present embodiment, the amount of elastic deformation of the shelf 5 made of synthetic resin may be at least about 60 mm. In this case, even if the shelf 5 is accidentally stepped on, the shelf 5 is not cracked because no further external force is applied by contacting the floor surface before the external force enough to break the shelf 5 is applied. Absent. Of course, in the case of the embodiments having different heights from the floor surface, it is desirable that the elastic deformation corresponding to the height is allowed in the shelf 5.

  As shown in FIGS. 1 and 2, a large number of holes 5 d are opened at the bottom surface of the shelf 5 evenly distributed over the entire area. Accordingly, the shelf 5 can be reduced in weight and can be easily bent, and further, liquid such as water and dust can be prevented from collecting. In the case of the present embodiment, the holes 5d have a hexagonal shape, and are continuously formed at regular intervals in the vertical and horizontal directions to form a honeycomb bottom surface as a whole. In this case, uniform elasticity can be given in the vertical and horizontal directions. The opening / hole 5d for promoting the bending / deformation is not limited to a hexagonal shape, and may be various shapes such as a perfect circular hole, an elliptical hole, a triangular hole, and a rectangular hole. Further, the arrangement of the holes 5d is not limited to being provided at regular intervals as in the present embodiment, and various arrangements such as local concentration or appropriate change in size or arrangement pitch are adopted as necessary. Can do.

  The planar shape of the shelf 5 is not particularly limited to the illustrated one, and various shapes, forms, and structures can be adopted as necessary. For example, since the shelf 5 supports both left and right sides with the bottom leg portion 4a, the shape of the front end edge 5c and the rear end edge 5b is not particularly limited. For example, as shown in the figure, it is possible to have a shape curved in the front-rear direction, a simple rectangular shape, or a drum shape protruding in both the front-rear direction. Since there is no restriction that the structure must be rectangular, the degree of freedom in design is high.

  The shelf 5 and the bottom leg 4a are fixed with a bending allowance that allows the shelf 5 to bend and deform. For example, in the present embodiment, the connection between the shelf 5 and the bottom leg 4 a is fixed so as to be displaceable so that the bottom leg 4 a is sandwiched between the connection member 9 and the shelf 5. Specifically, for example, as shown in FIG. 5, an arcuate (quadric) edge 5a projecting outwardly on both sides of the shelf 5 so as to cover the bottom leg 4a, and left and right bottom leg 4a. A connecting member 9 disposed so as to straddle between the main body portion 5e of the shelf 5 dropped between and the lower surface of the bottom leg portion 4a, and connected to the main body portion 5e of the shelf 5; The bottom leg portion 4a is held so as to be sandwiched between the edge portion 5a hung on the upper side of the portion 4a and the connecting member 9 addressed to the lower side, so that it can be displaced. The bottom surface of the main body portion 5e of the shelf 5 near the edge 5a is provided with a boss portion 11 constituting a female screw for screwing the screw 10 penetrating the connecting member 9, while the connecting member 9 has a position corresponding to the boss portion 11. The recess 12 is formed in the recess 12, and the tip of the boss 11 is accommodated in the recess 12, so that the portion where the boss 11 contacts the inner surface of the recess 12 is supported. In the case of the present embodiment, the boss portion 11 forms a tapered columnar shape that is slightly reduced in diameter toward the tip, and is formed so that four ribs 11a protrude outward in the radial direction at equal intervals. ing. Therefore, at the tip of the boss 11, the corner portions of the four ribs 11 a arranged in a cross shape are in point contact or line contact with the inner surface of the recess 12, and are movable along the inner surface of the recess 12. That is, a bearing structure equivalent to a pivot bearing comprising a pivot and a recess / pivot support is formed. Accordingly, the boss portion 11 slides so as to incline inward and supports the shelf 5 so that the shelf 5 is easily bent. Therefore, when the shelf 5 is stepped on, the bending occurs. That is, a bending allowance is secured. The boss part 11 is provided at two positions on the front and rear sides with an appropriate interval, and a rib composed of a vertical line and a horizontal line whose height is low by the depth of the recess 12 between the boss parts 11 at both ends. A (connecting member receiving surface) 11b is formed, and is provided so as to be in contact with the connecting member 9 and the rib 11b even outside the recess 12. The boss portion 11 and the rib 11b are integrally formed with the shelf main body portion 5e. A hole 12a for allowing the connecting screw 10 to pass through is formed in the bottom portion of the recess 12 on the connecting member 9 side, and a connecting screw (for example, a tapping screw) 10 inserted from below the connecting member 9 is provided. By screwing into the boss 11 housed in the recess 12, the shelf 5 and the connecting member 9 are connected while cutting the female screw. Further, in the present embodiment, the boss portion 11 is provided on the bottom surface of the main body portion 5e of the shelf 5 and the concave portion 12 is formed on the connecting member 9, but the concave portion 12 is provided on the shelf 5 and the boss portion is provided on the connecting member 9. 11 may be provided.

  Here, as shown in FIG. 2, the connection location between the shelf 5 that sandwiches the bottom leg portion 4 a and the connection member 9 is the vicinity of the front edge 5 c of the shelf 5 and the inside of the shelf 5, as shown in FIG. 2. There are two boss portions 11, and the bottom leg portion 4 a is sandwiched between the edge portion 5 a and the connecting member 9. That is, as shown in FIG. 3, in the middle of the bottom leg 4a, the front half of the shelf 5 is fixed, and the rear half is free supported without being constrained. For this reason, when the rear end 5b of the shelf 5 is stepped on, the rear half of the shelf 5 is greatly bent, and the boss portion 11 is inclined inward or slides in the vicinity of the rear connection portion so that the shelf 5 To promote the bending of The connection location is not particularly limited to the above-described position, and can be in the middle or the latter half of the shelf as required, and the number of connection locations is also arbitrary. Moreover, the connection location and attachment position with respect to the bottom leg part 4a of the shelf 5 are not limited to those illustrated in the above-described illustration, and may be the entire region of the bottom leg part 4a or closer to the front side. It may be arranged so as to have a space for stepping on each. In the present embodiment, the bottom leg 4a is an example using a pipe having a circular cross section, but the present invention is not limited to this. For example, a horizontally long flat elliptical pipe or a rectangular pipe may be used. In some cases, it may be a solid axis. In the present embodiment, since the bottom leg 4a of the round pipe is used as a horizontal support member for supporting the shelf 5, the edge portions 5a on both sides of the shelf 5 have an arc shape (quadric shape). This is not particularly limited, and a cross-sectional shape such as a horizontal plate shape or an inverted L shape may be used, and various edge shapes may be employed depending on the cross-sectional shape of the bottom leg 4a. Preferably, the edge shape is an edge shape that can be satisfactorily hooked on the bottom leg portion 4a, can maintain a strength capable of supporting the load to be placed, and is difficult to drop off from the bottom leg portion 4a when the shelf 5 is bent.

  Needless to say, the connecting structure capable of bending and deforming the shelf 5 and the bottom leg 4a of the leg 4 is not limited to the pivot bearing system described above, and as shown in FIG. 6, at least one of the connecting member 9 and the shelf 5 is used. That is, a long hole 29 is formed in at least one of the main body portion 5e near the edge 5a of the shelf 5 and the connecting member 9 in a longitudinal direction in a direction crossing between the pair of bottom leg portions 4a. By connecting the connecting member 9 and the shelf 5 with the connecting means, for example, the screw 30 through the hole 29, the shelf 5 is located on the inner side while sandwiching the bottom leg 4a between the edge 5a of the shelf 5 and the connecting member 9. It is also possible to fix to the bottom leg part 4a so that it can move toward. In this case, when the shelf 5 is stepped on, the fixed portion (the edge portion 5a of the shelf 5 in the connected state and the connecting member 9) rotates around the axis of the bottom leg portion 4a, or sandwiches the bottom leg portion 4a. The space between the connecting member 9 and the shelf 5 is widened to facilitate the bending of the shelf 5, and further, both edges 5 a are drawn between the left and right bottom legs 4 a within the range of the long holes 29. The shelf 5 bends while moving. On the other hand, when the external force is released, the shape of the shelf 5 is restored by the restoring force of the shelf 5 itself, and the fixed portion (connected to the edge 5a of the connected shelf 5 is centered on the axis of the bottom leg 4a). The distance between the connecting member 9 that rotates the member 9) or sandwiches the bottom leg portion 4a and the shelf 5 is restored, and the edge portions 5a at both ends further outward along the long holes 29 of the connecting member 9. In order to move (to return to the original position), it slides on the bottom leg 4a to return to its original state. Here, between the connection member 9 and the shelf 5 at the connection location, that is, between the bottom surface of the main body portion 5e of the shelf 5 near the edge 5a and the connection member 9, the shelf 5 and the connection member 9 at the connection location are It is preferable to arrange a spacer for keeping the gap approximately parallel to each other. For example, it is preferable that the protrusions / bosses 11 are integrally formed on the back surface side of the main body portion 5e of the shelf 5 or an independent cylindrical spacer (not shown) is interposed when the screws 30 are penetrated. In this connection structure, the connection member 9 is slidably or pivotally applied to the bottom leg portion 4a. However, the present invention is not limited to this, and the connection member 9 itself is attached to the bottom leg portion 4a in advance. It may be fixed with screws or the like. In this case, since the connecting member 9 is fixed to the bottom leg portion 4 a and does not rotate or move, the deflection of the shelf 5 is mainly promoted by the movement of the shelf 5 along the long hole 29.

  In addition, as shown in FIG. 7, for example, as shown in FIG. 7, the connection structure between the shelf 5 and the bottom leg 4a is an edge 5a that protrudes outward on both sides of the shelf 5 so as to cover the bottom leg 4a, and left and right bottom legs. Fastening screw 10 with connecting member 9 arranged so as to straddle between main body part 5e of shelf 5 dropped between 4a and the lower surface of bottom leg part 4a with bottom leg part 4a being sandwiched Etc., and the shelf 5 is attached so as to be bent easily by holding the fixed portion (the edge portion 5a of the shelf 5 in the connected state and the connecting member 9) to rotate around the axis of the bottom leg 4a. Anyway. Also in this case, a protrusion 11 or an independent spacer for keeping the space between the shelf 5 and the connection member 9 at the connection location approximately parallel may be disposed between the connection member 9 and the shelf 5 at the connection location. preferable.

  In the connection structure in the above-described embodiment, the connection member 9 may be slidable and caught on the bottom leg 4a by the clamping force between the edge 5a of the shelf 5 but the bottom leg 4a It may be fixed in advance with a screw or the like (not shown). Further, in the above-described embodiment, the connecting member 9 has a structure in which the engaging portion 9a having the bent end portion is provided and hooked on the bottom leg portion 4a. However, the connecting member 9 is not limited to this and is folded into a V shape. A bent locking portion (not shown) may be provided, or in some cases, it may be a simple flat plate.

  Furthermore, the method of fixing the shelf 5 to the bottom leg portion 4a with a bending allowance capable of bending deformation is not limited to the structure sandwiched by the two members described above. For example, as shown in FIG. 9, fork end-shaped (stitched) gripping portions 32 are integrally formed on the edge portions 5a on both sides of the shelf 5 to give elasticity to the bottom leg portions 4a on both sides. You may make it fit. Thus, it is good also as an attachment structure which accept | permits the curve and bending of the shelf 5 by making it rotate relatively between the stab-like holding part 32 and the bottom leg part 4a. In this case, in order to prevent the shelves 5 from falling off, a long hole 31 having a length in the rotational direction is formed on the side of the stab-like gripping part 32 or the bottom leg part 4a, and a screw 33 for preventing the dropping or the like is penetrated. Accordingly, the stab-shaped grip 32 may be rotated only within the range of the long hole 31.

  The method for fixing the shelf 5 and the bottom leg 4a with a bending allowance is not particularly limited to the fixing structure in which the bottom leg 4a is sandwiched between the connecting member 9 and the edge 5a of the shelf 5, and the bottom leg It is good also as a structure directly attached to 4a so that the edge part 5a of the shelf 5 can be slid to a horizontal direction. For example, as shown in FIG. 8, the edge 5a of the shelf is provided with a long hole 29 whose longitudinal direction is arranged in a direction crossing between the pair of bottom legs 4a, while a stud bolt or stud is provided on the bottom leg 4a. The shaft portion 33 is planted by welding or the like, and the shelf 5 is hooked on the bottom leg portion 4a so that the shaft portion 33 planted on the bottom leg portion 4a passes through the long hole 29 of the edge portion 5a. Then, the shelf 5 may be supported so as to be movable in a direction crossing between the bottom leg portions 4a. In this case, in order to prevent the shelves 5 from falling off, a presser plate that presses the entire edge 5a from above or a nut with a seat that is larger than the width of the long hole 29 (hereinafter collectively referred to as a presser member 34). The edge portion 5a may be sandwiched between the bottom leg portion 4a and the pressing member 34. Thereby, when the shelf 5 is stepped on, a force is applied so that both edges 5a of the shelf 5 are pulled inward, and the edges 5a slide in the lateral direction within the range of the long holes 29. The bending of is promoted. On the other hand, when released from the external force, the bending of the shelf 5 is released by the restoring force of the shelf 5 itself, and the edge portions 5a of both ends slide between the presser member 34 and the bottom leg portion 4a and move outward. To return to the position, the shelf 5 is restored.

  On the other hand, a seat and a back are provided on the leg 4. In this embodiment, as shown in FIG. 11, the seat 2 and the back 3 are constituted by a body support member 1 integrally formed of a resin molded product. The body support member 1 is provided such that the seat 2 is supported by the seat plate 8 and the back 3 is supported by the back frame 6.

  The seat portion 2 of the present embodiment is not particularly limited to the shape and structure shown in the drawing, but a spherical recess with a peripheral edge raised so as to wrap around the buttocks of the seated person, and the body of the seated person in particular. It has a peripheral part that hangs while gently rising so as to lift the back side of the thigh so as not to be compressed, and when supported horizontally, the front side of the thigh is lifted slightly with respect to the buttocks, and the body tilts slightly backward It is assumed that the posture is taken, and when the forward inclined posture is adopted, the front portion and the concave portion are substantially on a horizontal plane, and the posture is likely to be turned forward. On the other hand, the back portion 3 has a horizontally long elliptical shape that curves in the front-rear and left-right directions, and is provided so that the boundary portion with the seat can be largely bound. Therefore, the body support member 1 integrated with the back seat has a form and form with feminine elegance full of curvaceousness as a whole.

  The seat plate 8 is a resin molded product in which a desired strength is ensured while being lightweight with ribs arranged longitudinally and laterally. Although not shown, for example, irregularities that match the main seat receiving member 13 and the sub seat receiving member 14 Is formed on the back side and protrudes from the screw portion for fixing the main seat receiving member 13, the sub seat receiving member 14, and the seat receiving plate 15 to the back surface of the seat portion 2 of the body support member 1. A cylindrical receiving portion or the like that can be integrated by screwing and fixing the boss portion. Accordingly, the seat plate 8 is integrated with the body support member 1 and then provided on the leg 4 via the main seat receiving member 13, the sub seat receiving member 14, the seat receiving plate 15, and the like.

  In the case of the present embodiment, the armrest 7 is attached so as to protrude right and left by using the auxiliary seat receiving member 14 that protrudes laterally on the rear end side of the main seat receiving member 13. Specifically, the armrest 7 is addressed to both wing portions of the sub seat receiving member 14 from below and is fastened by screws screwed from below. In addition, a plastic armrest cover 18 is mounted under the armrest 7 so that the fixing portion of the armrest 7 is hidden from view. The armrest cover 18 is usually detachably mounted by hooking hook-like nails on the armrest 7. The armrest is formed of a circular arc concentric with the concave part of the hemispherical surface of the seat, with the inner surface curved.

  Further, as shown in FIGS. 4 and 11, the back frame 6 includes an elliptical cylindrical main seat receiving member fitting portion 46 which is long in the lateral direction at the lower end thereof, and the fitting portion 46 is received by the main seat receiving portion. The member 13 is fixed to the main seat receiving member 13 by being fitted to an inclined pointed portion (back frame attaching portion 47) having a cross-sectional shape at the rear of the member 13 and screwed. Specifically, the main seat receiving member fitting portion 46 at the lower end of the back frame 6 is fitted in a laterally-shaped gate-shaped pointed portion (back frame mounting portion 47) behind the main seat receiving member 13. It has a long oval shape and is formed in a cylindrical shape having a tapered storage cavity portion in which the ceiling height decreases (the dimension in the height direction becomes narrower) toward the depth side. The back frame receiver 16 is provided with a screw portion for fixing the fitting portion 46 of the back frame 6 at a position corresponding to the screw portion of the back frame 6. For this reason, the connection structure between the back frame 6 and the tip end portion of the main seat receiving member 13 is not only fixed to the back frame receiver 16 which is the upper surface of the tip end portion of the main seat receiving member 13 with screws or the like, Since both side wall portions of the pointed end portion simultaneously come into contact with the lower surface of the fitting portion 46 of the back frame 6, not only on the upper side but also on the lower side of the fitting portion 46 of the back frame 6. Since it is supported at the pointed end portion of the seat receiving member 13, stable and strong support can be obtained without wobbling. In this embodiment, the tapered and inclined pointed portion (back frame mounting portion 47) at the rear of the main seat receiving member 13 is not formed by integrally forming the ceiling surface and the side wall portion by bending. Only the side wall portion that narrows toward the end is formed, and the back frame receiver 16 is arranged and welded so as to straddle both side wall portions. Of course, a mounting surface corresponding to the back frame receiver 16 may be provided in advance integrally with the main seat receiving member 13.

  The back portion 3 and the back frame 6 of the body support member 1 are connected and supported at the upper portion of the back portion 3 as shown in FIGS. 4 and 13. For example, a protrusion (male member) 37 is integrally formed on the back side of the back 3, and a cylindrical portion (female member) 38 that protrudes toward the back is provided on the top of the back frame 6. A fastening screw 39 is screwed and fixed from below in a state in which the tubular portion 38 is fitted. The projection 37 and the cylindrical portion 38 are provided with screw holes and openings that are opened downward on the lower surfaces of the projection 37 and the cylindrical portion 38, respectively. And the tubular portion 38 are integrated. Therefore, since the screw fastening portion for joining the back and the back frame 6 cannot be seen from the side and the upper side of the back, the appearance is smart. In the present embodiment, the protrusion 37 and the cylindrical portion 38 are formed in a horizontally long oval shape, but the present invention is not particularly limited thereto, and irregularities having various shapes may be used. The back frame 6 has a substantially S-shaped side surface shape along the shape of the back portion 3 of the body support member 1 and a T shape when viewed from the back side. It is not limited.

  The chair of the present embodiment has a function that the back and the seat follow even when sitting in front (sitting on the seat shallowly). As shown in FIGS. 4 and 12, the back seat following function is provided on the main seat receiving member 13 supported so as to be swingable with respect to the pivot / leg joint shaft 4e disposed at the upper end of the leg 4. The rear end side is always pushed up to tilt the body support member 1 integrated with the back seat forward. In the case of this embodiment, by using an urging means such as the gas spring 22 to urge the rear end side of the main seat receiving member 13 to be constantly pushed up, when the seated person sits forward, the back portion 3 and The seat 2 tilts forward so as to follow (the state shown in FIG. 4A), and assists the seated person in the front sitting position. Further, when the seated person tries to stand up from the normal seating posture (the state shown in FIG. 4B), the standing up operation is assisted.

  The structure for supporting the body support member 1 includes a main seat receiving member 13, a sub seat receiving member 14, a seat receiving plate 15, a back frame receiver 16, a back frame 6, and a gas spring 22. The sub seat receiving member 14 and the back frame receiver 16 are welded and integrated to the rear end side of the main seat receiving member 13, and the seat receiving plate 15 is arranged and welded to the front end side so as to protrude laterally. ing. The main seat receiving member 13 is swingably attached to a leg joint shaft 4e on the front end side welded to the upper end of the leg 4. The main seat receiving member 13 and the leg joint shaft 4e are formed so as to protrude to the back side of the main seat receiving member 13 (projected to the back side by a concave portion in which the main seat receiving member 13 is recessed). A bearing base 19 and a saddle band-shaped bearing base bracket 20 fixed to the bearing base 19 with the leg joint shaft 4e interposed therebetween are rotatably supported. The leg joint shaft 4e is sandwiched from below by the bearing bracket 20, and is attached to the main seat receiving member 13 with screws. A semi-cylindrical bush 21 halved along the shaft cross section is provided between the bearing base bracket 20 and the bearing base 19 so as to be covered with the leg joint shaft 4e. A rectangular flange with which the outer peripheral surface of the bush 21 is inscribed is provided on the peripheral surface of the semicylindrical bush 21 so that the bush 21 is positioned and prevented from rotating.

  The bearing base metal 20 is fixed to the main seat receiving member 13 by using two holes of recesses formed on the left and right sides of the main seat receiving member 13 (which serve as bearing bases for supporting the leg joint shaft 4e on the back side). Has been. That is, the bearing bracket 20 is a pair of left and right bearing parts in a saddle band shape that rotatably supports both ends of the leg joint shaft 4e. A gas spring receiving bracket 23 is disposed between the bearing brackets 20 spaced apart from each other on the left and right sides, and is fixed to the leg joint shaft 4e.

  On the other hand, a gas spring bracket 23 is welded to the leg joint shaft 4e so as to be non-rotatable and integrated. This gas spring receiving metal fitting 23 is a metal fitting having a fork end shape for rotatably connecting one end of the gas spring 22 and is arranged downward and obliquely rearward as shown in FIG. It is welded. The gas spring receiving bracket 23 is connected to the main seat receiving member 13 via the gas spring 22. Therefore, fixing of the main seat receiving member 13 at the horizontal position is a point where the expansion and contraction of the gas spring 22 is fixed. The base end portion of the gas spring 22 and the gas spring bracket 23 are rotatably connected by a pin 24f.

  Here, the side close to the main seat receiving member 13 on the top surface of the gas spring receiving fitting 23 is formed on a slope 23a that is substantially parallel when the main seat receiving member 13 is in a normal seating state (substantially horizontal). As a stopper surface that stops the movement of the main seat receiving member 13 when the main seat receiving member 13 abuts when the contracting operation of the gas spring 22 does not stop at a position set as a point where the contracting operation of the gas spring 22 is fixed. It functions. Thus, the main seat receiving member 13 is provided so as not to overrun. That is, when the fixing with the gas spring 22 is activated, a slight gap is vacant between the lower surface of the main seat receiving member 13 and the top surface of the gas spring receiving metal fitting 23.

  Further, the main seat receiving member 13 has a peripheral wall portion extending downward on the peripheral edge portion, and forms a box shape having a rib effect. And the bearing part for attaching the gas spring 22 is formed in the rear-end side of the main seat receiving member 13 by punching, and it is bent and formed integrally. The bearing portion is provided with a hole through which a pin 24b to which a rod tip, which is one end of the gas spring 22, is connected.

  In the present embodiment, the reinforcing metal fitting 35 is provided so as to straddle the gas spring 22. In the case of this embodiment, the reinforcing metal fitting 35 is formed integrally with the back frame receiver 16 and is welded to the main seat receiving member 13. The reinforcing metal fitting 35 functions as a simple reinforcement, and may not be provided when sufficient strength is obtained.

  In the forward tilt type seat support structure configured as described above, the main seat receiving member 13 is rotatably supported with respect to the leg joint shaft 4e at the tip of the seat receiving portion 4b of the leg 4, but the gas spring Since the support fitting 23 is fixed to the leg joint shaft 4e, and the leg joint shaft 4e is fixed and supported on the front end of the upper base of the leg 4 in a non-rotatable manner, the gas spring support fitting 23 becomes a fixed link. If the inclination of the main seat receiving member 13 changes within the range in which the gas spring 22 expands and contracts, and the length is fixed in a state where the gas spring 22 is most contracted, three links (main seat receiving member) 13, a fixed chain composed of the gas spring bracket 23 and the gas spring 22) is formed. That is, the expansion and contraction of the gas spring 22 is fixed at the horizontal position of the main seat receiving member 13, and the body support member 1 integrated with the back seat can be held in a horizontal state to support the weight. That is, a relaxed posture can be adopted in which the front side of the thigh is slightly lifted and the body is slightly tilted backward. On the other hand, if the seated person wakes up so that the center of gravity moves forward, the rear end side of the main seat receiving member 13 is pushed up by the extension of the gas spring 22 to tilt the body support member 1 forward. For this reason, the front part and the recessed part of the seat part 2 are substantially in a horizontal plane, and a forward tilting posture is easily achieved. That is, it becomes easy to take the forward attitude as in the discussion.

  In the above-described embodiment, the body support member 1 integrated with the back seat is always urged by the urging means such as the gas spring 22 so as to take a forward leaning posture and sit with the weight on the back side. However, the structure is not limited to this movable structure, and the angle of the body support member is always fixed. Is also possible. For example, FIG. 15 shows an example of a back seat fixed type as another embodiment of an inverted cantilever type chair. The chair according to this embodiment does not have a function of assisting the seated person to stand up, that is, the main seat receiving member 13 and thus the body support member 1 are fixed to the leg 4 (hereinafter referred to as a fixed type chair). Called). In this fixed type chair, the main seat receiving member 13 and the leg joint shaft 4e are directly fixed and supported. Therefore, the gas spring 22 and related parts such as the bearing base bracket 20, the bush 21, and the gas spring bracket 23 are supported. However, many other parts can be shared with the above-mentioned forward tilt type chair. Specifically, as shown in FIG. 15, the fixing bracket 36 is inserted into the leg joint shaft 4 e in advance and welded, and then the fixing bracket 36 and the main seat receiving member 13 are screwed, whereby the main seat receiving member 13. And the leg joint shaft 4e are integrated and supported by the leg 4. For this reason, the body support member 1 integrated with the back seat is fixedly held with respect to the leg 4 and does not change its angle.

  Furthermore, the chair according to the present invention may be provided with a memo stand or an armrest as necessary. For example, FIGS. 16 to 17 show an embodiment of a chair provided with a memo stand. The chair of this embodiment is a reverse cantilever-type fixed type chair shown in FIG. 1 and a flip-up type memo stand. The memo stand 41 includes a top plate 42, a top plate receiver 43 that supports the top plate 42 so as to turn and rotate, and a memo stand support arm 44 that supports the top plate receiver. The memo stand support arm 44 and the auxiliary arm 45 are fixed to the chair by welding or the like to 4a and the seat receiving portion 4b. When not in use, the memo stand 41 is placed on the side of the chair so as to stand by, and when in use, the memo stand 41 is provided so as to be installed in front of a seated person by lifting and turning horizontally.

  The leg shape is not limited to the above-mentioned reverse cantilever type, and may be a cantilever type, a four-legged type or a rotating leg type having a leg part on the front side. It may be a circle leg formed by connecting a pair of left and right legs 4 formed into a rectangular ring shape by bending them together with a leg joint member. In any case, the above-described shelf 5 can be equipped as long as it has two bottom leg portions arranged on the left and right or front and back along the floor surface.

  For example, FIG. 18 shows an embodiment of a four-legged chair. Although this four-legged chair is not particularly illustrated, the main seat receiving member 13 is simply welded to the pipe on the upper bottom portion of the leg 4 constituting the four legs and the main seat receiving member 13. Is fixed to the top of the leg 4. Also in this four-legged chair, as shown in the drawing, it is preferable that the distance and space between the left and right legs are configured wider on the rear side than on the front side of the chair. In this case, there are advantages such as easy loading and unloading of the luggage to be placed on the shelf, the installation position of the substantially fan-shaped shelf 5 is uniquely determined, and positioning when the shelf is attached to the leg 4 is facilitated. Of course, the distance between the pair of left and right bottom leg portions 4a may be constant, that is, parallel, or the front may be formed wider than the rear. In the case of these four legs, the bottom leg portions of the two opposite sides arranged along the floor surface are not limited to the side leg joint pipes (crosspieces) connecting the front and rear legs. It is also possible to use a leg joint pipe (crosspiece) before and after connecting the legs. That is, as the bottom leg portion 4a that supports the edge portions 5a on both sides of the shelf 5, leg pipes (rails) arranged in the longitudinal direction in the left-right direction (width) direction may be used. The edge 5a is supported by the bottom leg at the front and rear ends, and the left and right ends are not supported. In this case, it is preferable that the left and right sides be easily bent in preparation for being stepped on from the left and right sides.

  In the case of a rotary leg type chair, although not shown, for example, a member (not shown) for receiving a gas spring for raising and lowering the pedestal is welded to the main seat receiving member 13, and the gas of the pedestal is added thereto. It can be fixed by inserting a spring. In the case of a swivel leg type chair, the upper seat and back of the leg rotate horizontally around the pedestal, so the anteroposterior relationship of the legs is not determined in a strict sense. For convenience, the outside of the leg wing is defined as the front, and the inside of the leg wing is defined as the rear. And between the leg blades, the above-described shelf 5 is fixed with a bending allowance that can be bent and deformed. For example, as described above, the connection between the shelf 5 and the leg blade (bottom leg) is fixed so as to be displaceable by sandwiching the bottom leg between the connecting member 9 and the shelf 5, or the leg blade (the bottom leg). The edge portion 5a of the shelf 5 may be directly slidable in the lateral direction by a combination of a long hole and a shaft portion planted by stud welding or the like.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, the method of fixing the shelf 5 is not limited to the above example. For example, in the above-described embodiment, the body support unit 1 is integrated with the back seat, but is not particularly limited thereto, and the seat and the back are not limited to each other. It may be a chair of a type that is attached to the leg 4 so as to be separated and movable separately, or that is fixedly supported on the leg 4 separately. Further, the biasing means in the above-described embodiment is not limited to the gas cylinder, and a spring or the like may be used.

4 leg 4a bottom leg 5 shelf 5a edge 5d hole (opening)
9 connecting member 10 screw (connecting means)
11 Boss part 12 Concave part 29 Long hole 30 Screw (connection means)
33 Shaft 34 Presser member

Claims (10)

  A chair provided with legs having two bottom leg portions arranged opposite to each other along a floor surface, wherein a shelf made of flexible synthetic resin is placed on the floor so as to straddle the bottom leg portions. A chair with a shelf, wherein the shelf and the bottom leg portion are fixed to each other with a bending allowance that allows the shelf to bend and deform.   The chair with a shelf according to claim 1, wherein the connection between the shelf and the bottom leg is fixed so as to be displaceable so as to sandwich the bottom leg between the connection member and the shelf.   At least one of the connecting member or the shelf is formed with a long hole whose longitudinal direction is arranged in a direction crossing between the pair of bottom leg portions, and the connecting member and the shelf are formed in the long hole. 3. The chair with a shelf according to claim 2, wherein a means for connecting the two and the shelf penetrates and the shelf is supported so as to be movable in a direction crossing between the bottom legs.   The connecting member includes at least two hemispherical concave portions having through holes in the bottom, and a cylindrical boss that fits in the concave portions is provided on the back side of the shelf, and the bosses pass through the through holes of the concave portions. The chair with a shelf according to claim 2, wherein the shelf is connected so as to be swingable in the recess by screwing a screw connecting the connection member and the shelf.     2. The chair with a shelf according to claim 1, wherein the connection between the shelf and the bottom leg is directly attached to the bottom leg so that an edge of the shelf can be slid in a lateral direction.   The bottom leg portion of the leg has a longitudinal direction arranged in the front-rear direction, and a distance between the pair of left and right bottom leg portions is wider at the rear than at the front. The chair with a shelf according to any one of 5.   The chair with a shelf according to any one of claims 1 to 6, wherein the shelf is formed so that the rear side is easily bent with respect to the front side.   The chair with a shelf according to any one of claims 1 to 7, wherein the shelf has a bottom inclined forward from the rear to the front, deep in the front, and shallow in the rear.   The chair with a shelf according to any one of claims 1 to 8, wherein the shelf is provided with an opening that promotes bending deformation. The bottom leg of the leg is arranged in the longitudinal direction in the front-rear direction, and the distance between the pair of left and right bottom legs is wider at the rear than at the front,
The shelf is shorter than the length of the bottom leg, and has a rear end edge located at the rear end of the bottom leg and a space that allows a foot to be retracted in front of the front end edge. The width of the rear is wider than the front, the rear is easily bent with respect to the front, and the bottom is inclined forward from the rear to the front, the front is deep and the rear is shallow. The chair with a shelf as described in any one of Claim 1 to 5.