JP2008081318A - Resin conveyor belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a resin conveyor belt with a trough shape in which the belt can be easily bent and easily laid down along a trough-shaped passage. <P>SOLUTION: In this resin conveyor belt 1, at least one layer of resin layer 3 is placed on the conveying surface of at least two layers of core canvas 2, The resin conveyor belt is used in a trough shape having a longitudinally extending bent part formed in at least one position. Grooves 7 for forming fold lines are formed on the surface of the belt on the drive surface 1b side of the bent part brought into contact with a pulley. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a resin conveyor belt for conveyance, and more particularly to a conveyor belt provided with a trough for preventing a conveyed product from dropping in the lateral direction of the belt during conveyance.

  As a conveyor belt, for example, there is a resin conveyor belt having a structure in which a resin layer is laminated on a core canvas as shown in Patent Document 1 and Patent Document 2. These belts are used for conveying foods and various things.

  In addition, belt conveyors that continuously feed edible and chemical raw materials, intermediate products, products and the like in a certain direction are used in manufacturing factories and the like. These belt conveyors are required to produce foods and chemicals hygienically while preventing them from various germs and at the same time mass-producing them with high productivity. Belt conveyors are also mainly developed.

  Patent Document 3 discloses a trough-type conveyor belt that conveys a conveyed product in a shape in which both side ends are folded as a belt used for conveying an article.

JP 2001-63811 A JP 2003-48611 A Japanese Utility Model Publication No. 06-078325

  In a trough-shaped conveyor belt, both side ends of the belt are usually bent upward so that the conveyed product does not spill from the belt. However, depending on the size of the belt and the type of material, the belt is difficult to bend, and along the trough-shaped passage, the running stability of the belt may be impaired, or the belt may be out of the trough-shaped passage. In particular, when the weft yarn of the canvas used as the core is a monofilament yarn, the monofilament yarn is used as the weft of the canvas used as the core, so that there is a problem that the lateral rigidity is high and it is difficult to follow the trough shape.

  Accordingly, an object of the present invention is to provide a resin conveyor belt that can easily follow the trough shape of the trough-shaped conveyor belt and has high running stability.

  In order to achieve the above object, according to a first aspect of the present invention, there is provided a resin conveyor belt having a configuration in which at least one resin layer is laminated on a conveyance surface of at least two core canvases, and at least 1 In the resin conveyor belt used in the trough shape used with the bent portion extending in the belt longitudinal direction, a groove for making a crease is provided on the belt surface on the drive surface side that contacts the pulley of the bent portion. It is characterized by becoming.

  In Claim 2, it is set as the resin conveyor belt of Claim 1 formed by laminating | stacking at least 1 layer of resin layer on a conveyance surface.

  In Claim 3, it is set as the resin conveyor belt of Claim 1 whose depth of a groove | channel is 10 to 70% of the thickness of a resin conveyor belt.

  According to a fourth aspect of the invention, the weft yarn in the belt width direction of the canvas is a monofilament.

  By providing a groove on the drive surface of the resin conveyor belt, it can be easily bent along the groove, so that it is possible to follow the trough path and reduce the problem that the conveyor belt comes off the path. And the running stability of the belt can be improved.

  In Claim 2, the resin layer is laminated | stacked on the conveyance surface, and while being able to protect a conveyance surface, the state of a surface can be changed suitably.

  In claim 3, the depth of the groove is limited, the required minimum strength can be maintained in the groove portion of the resin conveyor belt, and the groove has a sufficient degree to follow the trough-shaped passage. can do.

  According to the fourth aspect of the present invention, when the monofilament is used as the weft used in the belt width direction of the canvas used for the belt, the belt is not easily bent, and the belt can be more surely aligned with the trough-shaped passage by providing the groove. As a result, running stability can be improved.

  As shown in FIGS. 1, 2 and 3, the resin conveyor belt 1 of the present invention is obtained by laminating and bonding a resin layer 3 to the surface of a core canvas 2, and in the example shown in FIG. Two layers are laminated and integrated, and in the example shown in FIG. 2, two core canvases 2 and one resin layer 3 are laminated. It does not matter whether the core canvas 2 or the resin layer 3 is a single layer or a plurality of layers.

  Moreover, it is a trough-shaped belt in which both sides of the belt 1 are bent upward. In the example of FIGS. 1 and 2, the belt is divided into three parts in the width direction in the central part 4 and the two end parts 5 and 6, and the belt is bent upward at the boundary 7 between the central part 4 and the end parts 5 and 6. Thus, the both ends 5 and 6 are raised by about 10 to 50 degrees to form a trough shape, and the belt 1 is configured so that the conveyed product does not spill from the belt.

  The core canvas 2 used for the resin conveyor belt 1 is a low-stretch high-strength woven canvas, specifically, a canvas made of yarn made of aramid fiber, polyamide fiber, polyester fiber, polyether ether ketone fiber, etc. The core canvas 2 is impregnated or coated with resin. Examples of the resin to be impregnated / coated include thermoplastic polyurethane resins, polyvinyl chloride resins, and polyolefin resins such as polyethylene.

  In addition, as the yarn made of the above-mentioned fibers, for example, a filament having a fineness of 1000 to 2000 denier and twisted together by twisting two or ten filaments of filament filaments, or twisting them together. Weave in plain weave, mat weave, twill weave or satin weave. Use of monofilament yarns for the wefts in the belt width direction is advantageous in terms of increasing the rigidity in the belt width direction.

  Note that the number of yarns having a fineness of 1000 to 2000 denier per cord constituting the core body canvas is 50 times / m to 500 times / m. The core canvas 2 is configured, and the number of longitudinal cords in the belt longitudinal direction and the transverse cords in the belt width direction, that is, cord density is about 40 to 150 per 5 cm. In addition, the variation in the number of cords is configured to be within ± 0.5 over the entire width and the entire length of the body canvas, which suppresses the local elongation phenomenon of the belt itself, and the worst situation of early cutting due to the stress concentration of the belt Can be prevented in advance.

  Also, in order to suppress meandering that occurs during the running of the resin conveyor belt, with respect to the longitudinal cord twisting direction that constitutes the core canvas 2, the longitudinal cord alternates between the S-direction twisted yarn and the Z-direction twisted yarn. It is also possible to combine them.

  As the resin layer 3 laminated on the core canvas 2, a polyolefin resin such as a thermoplastic polyurethane resin, a polyvinyl chloride resin, or polyethylene can be used.

  In addition, as a method for manufacturing a resin conveyor belt, for example, as shown in FIG. 4, the resin material is extruded into a sheet shape by an extruder D, and laminated with a core canvas 2 in a high-temperature, semi-molten state immediately after extrusion. It applies to the resin conveyor belt 1 obtained by pressurizing between the rolls 10 and 11 and laminating and bonding them. Although not shown, a method of laminating the core canvas 2 and the resin layer 3 by flat press may be used. When laminating the core canvas 2 of a plurality of layers, an intermediate layer (not shown) made of polyurethane, polyvinyl chloride, polyolefin or the like is disposed between the core canvases 2 so that both can be laminated and fused well. can do.

  In the present invention, a groove is formed in the boundaries 7 and 8 between the central portion 4 and the end portions 5 and 6 on the drive surface 1b side of the transport surface 1a on which the transported material of the resin conveyor belt 1 is loaded and the drive surface 1b in contact with the pulley. Is provided. By providing this groove, the end portions 5 and 6 can be easily bent upward at the boundary 7, and the end portions 5 and 6 can be bent upward with a clear crease by improving the conditions. be able to. In particular, in the case of a belt having a narrow width with respect to the thickness of the belt 1, for example, a thickness / width ratio of 0.02 or more, it is difficult to bend the end portions 5 and 6. Further, even when monofilaments are used in the belt width direction of the core canvas 2, the rigidity in the belt width direction is high and it is difficult to bend the end portions 5 and 6 of the belt. However, as described above, the boundary 7 By providing the groove on the drive surface 1b side, the belt can be easily bent, so that a belt having a good trough shape can be obtained.

  The shape of the belt is not limited to the one that is divided into three in the width direction and bends at both ends. For example, as shown in FIG. It is also possible to apply to a belt having a shape such as that shown in FIG. 6 or a shape in which the belt is bent in the width direction and bent at each boundary as shown in FIG. By providing the groove on the surface side, the belt can be easily bent and a belt having a clean trough shape can be obtained.

  Although not shown, the present invention can be applied even if the core canvas 2 has one ply or three or more plies, and the effect of the present invention can be obtained by providing a groove.

  The depth of the groove is preferably provided in the range of usually 10 to 70% of the belt thickness, and if it is less than 10%, the effect of facilitating bending by providing the groove is poor, and if it exceeds 70%, the boundary This is not preferable because the thickness of the portion becomes too small, causing a problem in strength.

  The present invention is a conveyor belt in which a core canvas and a resin layer are laminated, and can be applied to a trough-shaped conveyor belt in which both end portions in the belt width direction are bent upward.

It is sectional drawing which shows an example of the resin conveyor belt of this invention. It is sectional drawing which shows another example of the resin conveyor belt of this invention. It is sectional drawing of the place which bent the resin conveyor belt of FIG. It is a side view of the place which has laminated the canvas core and the resin material. It is sectional drawing which shows another example of the resin conveyor belt concerning this invention. It is sectional drawing which shows another example of the resin conveyor belt concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin conveyor belt 2 Core body canvas 3 Resin layer 4 Center part 5 End part 6 End part 7 Boundary

Claims (4)

  A resin conveyor belt comprising at least two layers of core canvas, and having a bent portion extending in the belt longitudinal direction at least at one place, and a pulley of the bent portion used in a trough shape A resin conveyor belt characterized in that a groove for making a crease is provided on the belt surface on the drive surface side in contact with the belt.   The resin conveyor belt according to claim 1, wherein at least one resin layer is laminated on the transport surface.   The resin conveyor belt according to claim 1 or 2, wherein the depth of the groove is 10 to 70% of the thickness of the resin conveyor belt.   4. The resin conveyor belt according to claim 1, wherein the weft in the belt width direction of the canvas is a monofilament.

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