JP2018144974A - Method of manufacturing conveyor belt and conveyor belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a conveyor belt capable of easily making a conveyor belt having high breaking strength.SOLUTION: A method of manufacturing a conveyor belt includes an exposure step of stripping rubber from both ends, in the belt longitudinal direction, of a belt material 1 to expose a plurality of core bodies 2, a step of disposing the exposed core bodies into groove portions of a rubber member 5 having a plurality of groove portions 6 into which the plurality of core members can enter, in a state in which the ends of the exposed core bodies on one end side and the other end side in the belt longitudinal direction of the belt material face each other, and a joining step of joining both ends in the belt longitudinal direction of the belt material by covering the plurality of exposed core members with a rubber material including a rubber member to integrate the plurality of core members and the rubber member.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for manufacturing a conveyor belt and a conveyor belt.

  An endless conveyor belt is generally manufactured by joining one end side and the other end side in the longitudinal direction of a flat and endless belt material.

  As a conventional endless conveyor belt, a plurality of core reinforcing layers embedded in a flat belt material are divided into a plurality of belt material width directions at both ends of the belt material longitudinal direction, and the respective divided portions are belts. Some are joined by butting at different positions in the longitudinal direction of the material.

Japanese Patent Laying-Open No. 2015-81182

  Here, as the belt material, a belt material in which a linear core body made of metal or the like is included in rubber is often used. When such a belt material is used as an endless conveyor belt, the belt material is exposed by exposing the core from both ends of the belt material, arranging the exposed cores, and sandwiching it again with a plate-shaped rubber material or the like. The manufacturing method which joins the both ends of this is common.

  FIG. 5 is a cross-sectional view for explaining an example of a conventional method of manufacturing a conveyor belt. In this manufacturing method, although not shown, both end portions of the belt material are joined in a state where the exposed ends of the core body 20 are butted together. In that case, as shown in FIG. 5, since it is necessary to hold the exposed core body in a desired position, the adhesive core is applied to the entire outer peripheral surface of the core body, and then the core body is applied. 20 and the surrounding rubber material were integrated.

  However, since it takes time to dry the rubber cement, the working efficiency tends to decrease. Furthermore, humidity control is indispensable during drying, and it is costly to prepare a drying facility suitable for the environment, such as a dehumidifier or a forced drying device (industrial dryer or heat lamp). Here, the rubber cement refers to a composition that contains at least a rubber component and a solvent that dissolves the rubber component, and is used to bond the rubber members together or between the rubber member and the member containing the rubber component. In addition, rubber cement is usually made by dissolving adhesive rubber in a flammable organic solvent, and thus requires measures such as safety management for workers and prevention of fire during work, which is troublesome and tends to increase costs.

  Further, when the exposed cores are joined in a state where they are alternately overlapped, a part of the core is inevitably bent, and a repulsive force is generated to return the core to the original straight state. Therefore, in order to hold the core in a desired position, it is still necessary to use rubber cement. In this case, the above-described problems due to the use of rubber cement occur. In addition, a conveyor belt having a higher breaking strength that suppresses the possibility of a reduction in breaking strength due to stress concentration on the bent portion of the core is desired.

  An object of the present invention is to provide a method for manufacturing a conveyor belt, which can easily obtain a conveyor belt having high breaking strength. Furthermore, it aims at provision of the conveyor belt which has high breaking strength.

  The method of manufacturing a conveyor belt according to the present invention includes a plurality of cores arranged in the belt width direction and extending in the longitudinal direction of the belt. The endless conveyor belt is obtained by joining both ends of the belt material. A manufacturing method of a conveyor belt for manufacturing, wherein the rubber is peeled off from both ends in the longitudinal direction of the belt material to expose the plurality of cores, and after the exposing step, the belt material The exposed plurality of core bodies can enter the plurality of core bodies in a state where the exposed ends of the plurality of core bodies on the one end side and the other end side of the belt in the belt longitudinal direction are abutted with each other. A rubber member having a plurality of groove portions is arranged so as to enter the groove portion, and after the placement step, the exposed cores are covered with a rubber material including the rubber member. By integrating the said rubber material and said plurality of core members, said joining the belt longitudinal direction end portions of the belt material, characterized by comprising a bonding step. According to the method for manufacturing a conveyor belt of the present invention, a conveyor belt having high breaking strength can be easily obtained.

  In the method for manufacturing a conveyor belt according to the present invention, in the arranging step, at least a part of a plurality of abutting positions in which the exposed ends of the plurality of core bodies are abutted on the one end side and the other end side. Are preferably different from each other in the longitudinal direction of the belt. According to this configuration, the joint portion is unlikely to separate.

  In the method for manufacturing a conveyor belt according to the present invention, in the arranging step, a plurality of butted positions where the exposed ends of the plurality of cores on the one end side and the other end side are butted are the one end. A part-side, abutting position located in the vicinity of the base ends of the exposed cores, and a matching position located in the vicinity of the base ends of the exposed cores on the other end side, It is preferable to arrange them alternately in the belt width direction. According to this configuration, the joined portion is less likely to be separated.

  The conveyor belt of the present invention includes a plurality of core bodies extending in the belt longitudinal direction arranged in the belt width direction in rubber, and the plurality of core bodies have a butt structure at the coupling portion of the belt, And it is arrange | positioned on the rubber member which has a some groove part, Cement is not used in the said connection part, It is characterized by the above-mentioned. According to the conveyor belt of the present invention, high breaking strength can be realized.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of a conveyor belt which can obtain the conveyor belt which has high breaking strength simply can be provided. Furthermore, a conveyor belt having a high breaking strength can be provided.

It is a belt width direction sectional view showing an example of a belt material. (A) It is a top view which shows an example of the matching position of a core. (B) It is a top view which shows the other example of the matching position of a core. It is the schematic for demonstrating one Embodiment of the manufacturing method of the conveyor belt which concerns on this invention. It is belt width direction sectional drawing for demonstrating the arrangement | positioning step and joining step in one Embodiment of the manufacturing method of the conveyor belt which concerns on this invention. FIG. 5 is a sectional view in the belt width direction similar to FIG. 4 for explaining an example of a conventional method for manufacturing a conveyor belt.

  Hereinafter, an embodiment of a method for manufacturing an endless conveyor belt according to the present invention will be described with reference to the drawings.

First, an example of a belt material that can be used in a manufacturing method according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a belt width direction sectional view showing an example of a belt material. This belt material 1 is a long flat plate-shaped and end-capped material (having both ends in the long longitudinal direction), and the belt material 1 used in the method for manufacturing a conveyor belt according to the present invention has a belt width direction ( A plurality of core bodies 2 arranged in the longitudinal direction of the belt (the front and back direction of the paper surface of FIG. 1) arranged in the left-right direction of the paper surface in FIG.
In the present specification, the “belt width direction” is used to mean both the width direction of the belt material 1 for manufacturing a conveyor belt and the width direction of the manufactured conveyor belt. . The same applies to “belt longitudinal direction”, “belt thickness direction” and the like in this specification.

Here, for the plurality of core bodies 2, for example, a wire body such as a steel cord can be used. Further, the number and diameter of the core bodies 2, the interval between the core bodies 2 adjacent to each other in the belt width direction, and the like can be appropriately changed.
Furthermore, the material of the rubber 3 may include, for example, a natural rubber, a synthetic rubber such as a diene synthetic rubber, or a combination of these as a rubber component. In addition, the rubber | gum 3 is not restricted to what consists of one type of material, It is good also as what consists of a layer of a some material.

Next, with reference to FIGS. 1-4, one Embodiment of the manufacturing method of the conveyor belt which concerns on this invention is described. FIG. 2A is a plan view showing an example of the butting position of the core body, and FIG. 2B is a plan view showing another example of the butting position of the core body. FIG. 3 is a schematic view for explaining an embodiment of the method for manufacturing a conveyor belt according to the present invention, and FIG. 4 is an arrangement in one embodiment of the method for manufacturing a conveyor belt according to the present invention. It is a belt width direction sectional view for explaining a step and a joining step. The conveyor belt manufacturing method according to the present embodiment includes an exposure step, an arrangement step, and a joining step.
In the present specification, the term “abut” the ends of the core body, more specifically, the ends of the core body means that the ends of both ends of the core body do not contact each other, and both ends of the core body This means that the ends are brought close to each other so that the portions do not overlap in the belt width direction, and the both end portions are arranged in a substantially straight line.
Hereinafter, each of these steps will be described in order.

[Exposure step]
In the exposing step, the rubber 3 is peeled off from both ends in the belt longitudinal direction of the belt material 1 in FIG. Specifically, for example, the rubber 3 of the belt material 1 is cut and peeled using a knife, an electric heating cutter, a piano wire or the like, and the rubber 3 adhered to the periphery of the core body 2 is further removed with a wire brush or the like. May be removed. If the rubber 3 still remains around the core body 2, it can be removed with a solvent or the like.

[Placement step]
In the arranging step, after the exposing step, the exposed cores 2 are arranged so as to enter the groove 6 of the rubber member 5 having a plurality of grooves into which the cores 2 can enter.

  Here, more specifically, the state in which the exposed ends of the plurality of cores 2 on one end side and the other end side in the belt longitudinal direction of the belt material 1 are in contact with each other is more specifically the belt of the belt material 1. The state which each end of the some core body 2 of the one end part side in the longitudinal direction and each end of the some core body 2 of the other end part side in the belt longitudinal direction of the belt raw material 1 is faced | matched.

  In the arrangement step, for example, the exposed ends of the plurality of cores 2 on one end side and the other end side in the belt longitudinal direction of the belt material 1 are brought into contact with each other, and then the exposed plurality of cores 2 may enter the groove 6 of the rubber member 5, or the exposed plurality of cores 2 may enter the groove 6 of the rubber member 5, and the above-described butted state may be obtained. That is, the plurality of exposed core bodies 2 are inserted into the groove portion 6 of the rubber member 5, so that the above-described butted state is obtained at the stage where the core body 2 is disposed in the groove section 6 (the stage before the joining step described later). It only has to be.

The material of the rubber member 5 having a plurality of groove portions may include, for example, natural rubber, synthetic rubber such as diene synthetic rubber, or a combination of these as a rubber component. Furthermore, the rubber member 6 is preferably unvulcanized.

  The rubber member 5 has a plurality of groove portions 6 into which the plurality of core bodies 2 can enter. In this embodiment, as shown in FIGS. 3 and 4, each of the plurality of groove portions 6 extends along the extending direction of each core body 2 (and consequently the longitudinal direction of the belt material 1), The rubber member 5 is formed at a position in the belt width direction corresponding to the position in the belt width direction of the core body 2.

  The plurality of grooves 6 may be any shape as long as the core body 2 can enter. In the present embodiment, as shown in FIGS. 3 and 4, the core body 2 has a cylindrical shape. It has a semicircular shape in the cross section in the width direction. However, the shape of the groove 6 does not have to be a semicircular cross section regardless of the shape of the core body 2 or regardless of the shape of the core body 2, and may be, for example, a rectangular cross section or a semielliptical cross section. As shown in FIG. 4, the entire core body 2 does not need to enter the groove portion 6, and may be partially in the belt thickness direction from the groove portion 6.

  The core body 2 is disposed directly (that is, exposed) without applying an adhesive body such as rubber cement when the core body 2 is disposed in the groove portion 6.

  According to the method for manufacturing a conveyor belt according to the present embodiment, the exposed core body 2 in the abutted state is disposed in the groove portion 6 formed in the rubber member 5 in the arranging step, so that the core body is at a desired position. 2 can be stably held. Further, since the ends of the core body 2 are brought into contact with each other, a bent portion is not formed in the core body 2, so that no repulsive force is generated, and it is accommodated in the groove portion 6 in this state. Can be prevented from moving from the position, and a conveyor belt with high breaking strength can be obtained. Furthermore, since it is not necessary to apply an adhesive material such as rubber cement to the core body 2, it is possible to prevent a reduction in work efficiency and an increase in labor and cost due to the use of the rubber cement.

In the arrangement step, as shown in FIG. 2 (a), at least a part of the abutting positions 4 where the ends of the exposed cores 2 on the one end side and the other end side are abutted with each other are The belts are preferably different from each other in the belt longitudinal direction. In the illustrated example, all of the butting positions 4 are different in the belt longitudinal direction. According to such a configuration, the joint portion of the conveyor belt is not easily separated.
Here, the abutting position refers to the center position of the distance in the longitudinal direction of the belt from the end on one end side to the end on the other end side of the core body 2 that is close to and opposed in the belt longitudinal direction.

  As described above, in order to vary a plurality or all of the butting positions in the belt longitudinal direction, for example, when cutting the belt material 1 in the middle of the belt longitudinal direction, a line inclined with respect to the belt width direction is drawn, By cutting along the line including the core body 2, all the butting positions can be made different. Alternatively, first, one end side and the other end side in the belt longitudinal direction of the belt material 1 face each other so as to be positioned in a straight line, and the exposed cores 2 are overlapped in the thickness direction of the belt material 1. Next, the exposed cores 2 on one end side are cut into different lengths. Then, the exposed core body 2 on the other end side located on the straight line in the longitudinal direction of the belt of each core body 2 that has been cut is connected without the ends of both ends of the core body 2 being in contact with each other. The ends of the body 2 are close to each other so as not to overlap each other in the belt width direction, and are cut to a length that can be arranged so that the ends are aligned in a substantially straight line. In this way, all the core bodies 2 can be brought into contact with each other.

Moreover, in the said arrangement | positioning step, as shown in FIG.2 (b), the some butt | matching positions 4 which each butt | matched each end of the some exposed core 2 on one end part side and the other end part side are one end. The abutting position 4 located near the proximal ends of the exposed plurality of cores 2 on the part side, and the abutting position 4 located near the proximal ends of the exposed cores 2 on the other end side The belts are preferably arranged alternately in the belt width direction. Specifically, with respect to the plurality of butting positions 4, the one near the base end of the core body 2 on one end side and the one near the base end of the core body 2 on the other end side with respect to the center LC are belts. Adjacent in the width direction. In other words, as shown in FIG. 2B, the belt length from the base end of the exposed cores 2 on one end side to the base end of the exposed cores 2 on the other end side The abutting positions 4 are alternately arranged in the belt width direction on one side and the other side in the belt longitudinal direction with the center LC of the direction length L as a reference. According to such a structure, it becomes difficult to isolate | separate a junction part.
Here, the length in the longitudinal direction of the belt from the center LC to the butting position 4 is preferably 80% to 90% of the length L. This is because the joined portion is less likely to be separated, and a conveyor belt in which the load burden of the cores at both ends of the joined portion is balanced can be easily obtained.
Note that, as shown in FIG. 2B, the butting positions 4 may be the same in the belt longitudinal direction every other belt width direction.
Furthermore, the belt longitudinal direction length from the center LC to the butting position 4 of the butting positions 4 adjacent in the belt width direction may be the same. In other words, the length in the longitudinal direction of the belt from the base end of the core 2 on one end side to the butting position 4 is the core 2 on the other end side adjacent to the core 2 on the one end side in the belt width direction ( That is, the one end side core body 2 adjacent to the one end side core body 2 in the belt width direction and the other end side core body 2 adjacent to and opposite to the belt longitudinal direction) from the base end to the butting position 4. It may be the same as the length in the longitudinal direction of the belt.

  In the arrangement step, the ends of the cores 2 on both ends are abutted and the cores 2 on both ends are in close proximity to each other on a substantially straight line. At this time, one end of the core 2 that is in close proximity to each other The belt longitudinal direction distance l from the end on the side to the end on the other end side is preferably 20 mm or more and 50 mm or less. The reason for setting it to 20 mm or more is that the ends may collide with each other due to deviation or the like, and the core body may be broken. Also, the reason for setting it to 50 mm or less is to fully exert the role of reinforcing the original belt material of the core or the conveyor belt, and further reducing the breaks of the core as much as possible to prevent a decrease in the breaking strength of the conveyor belt. is there.

[Join step]
In the joining step, after the placing step, the exposed plurality of core bodies 2 are covered with a rubber material including a rubber member 5 having a plurality of groove portions 6, and the plurality of core bodies 2 and the rubber material are integrated, Both ends of the belt material 1 in the longitudinal direction of the belt are joined.

  In the joining step, as shown in FIG. 4, for example, the core body 2 can be covered with a rubber member 5 having a plurality of groove portions and another rubber material that is the same as or different from the rubber member 5. In the illustrated example, the core body 2 is sandwiched between a rubber member 5 having a plurality of grooves and a sheet-like rubber material 7, and the rubber member 5 and the rubber material 7 are thicker than the rubber material 7 in this example. It arrange | positions so that it may pinch | interpose with other sheet-like rubber materials 8.

In the illustrated example, the rubber material 7 is a flat belt-like member having no groove portion. However, like the rubber member 5 having a plurality of groove portions, a rubber material having a plurality of groove portions into which a plurality of core bodies 2 can enter is provided. You can also Further, in the illustrated example, the rubber member 5 and the rubber material 8 are separate members, but they may be integrated before the joining step. The rubber material 7 and the rubber material 8 may also be integrated before the joining step.

  The material of the rubber material 7 and the rubber material 8 can include, for example, a natural rubber, a synthetic rubber such as a diene synthetic rubber, or a combination of these as a rubber component. The rubber member 5, the rubber material 7, and the rubber material 8 may be all or part of the same material, or may be different materials. Further, the rubber material 7 and the rubber material 8 are also preferably unvulcanized.

  The rubber member 5, the rubber material 7, and the rubber material 8 having a plurality of groove portions extend from the base ends of the exposed core bodies 2 on one end side to the base ends of the exposed core bodies 2 on the other end side. Preferably, the belt-shaped member has a belt length in the belt length direction substantially the same as the length L in the belt length direction and the belt width direction length of the belt material 1. It is not limited to.

  The rubber member 5, the rubber material 7, and the rubber material 8 are a plurality of core bodies 2, and the rubber member 5, the rubber material 7, and the rubber material 8 in which the plurality of core bodies 2 are inserted into the groove portions 6 will be described later. It is preferable that the thickness of the conveyor belt is adjusted and arranged so that the surface of the conveyor belt becomes a smooth surface when the belt material 1 is joined at the joining step and the belt longitudinal ends of the belt material 1 are joined. .

  In the above joining step, the plurality of core bodies 2 and the rubber member 5, the rubber material 7 and the rubber material 8 in which the plurality of core bodies 2 are inserted into the groove 6 are, for example, a press device (not shown). The belt material can be vulcanized in an integrated manner while being pressed by a press device, and both ends of the belt material in the belt longitudinal direction can be joined.

In addition, the conveyor belt obtained by each said step has the belt width direction cross section similar to the belt width direction cross section of a belt raw material shown in FIG.

As described above, according to the method for manufacturing a conveyor belt of the present invention, the exposed core body 2 in a butted state is disposed in the groove portion 6 formed in the rubber member 5, thereby stress on the bent portion of the core body. It is possible to obtain a conveyor belt having a higher breaking strength that suppresses the possibility of a reduction in breaking strength due to concentration, and further prevents a decrease in work efficiency and an increase in labor and cost due to the use of rubber cement. it can.

Next, the endless conveyor belt according to the present invention will be described. The conveyor belt of the present invention includes a plurality of cores 2 extending in the longitudinal direction of the belt arranged in the belt width direction in rubber, and the plurality of cores 2 have a butted structure at the belt coupling portion. And it is arrange | positioned on the rubber member which has the some groove part 6, and cement is not used in a coupling | bond part.
That is, in the belt coupling portion of the belt material 1 of the present invention, the plurality of core bodies 2 have a butting structure, and no bent portion is formed on the core body 2. Accordingly, when the conveyor belt is used, it is possible to suppress the possibility of a decrease in breaking strength due to stress concentration on the bent portion of the core body. Furthermore, since it has a structure in which an adhesive material such as rubber cement is not applied to the core body 2, it has a high breaking strength while preventing a reduction in work efficiency and an increase in labor and cost due to the use of rubber cement. Can have.

  The method for manufacturing a conveyor belt according to the present invention can be suitably used when manufacturing a conveyor belt from a new belt material. For example, a new conveyor belt is manufactured using a part of the used conveyor belt as a belt material. In particular, it can be suitably used.

  1: Belt material, 2: Core body, 3: Rubber, 4: Abutting position, 5: Rubber member (rubber material), 6: Groove, 7, 8: Rubber material

Claims (4)

A method of manufacturing a conveyor belt, in which a plurality of cores arranged in the belt width direction and extending in the longitudinal direction of the belt are encapsulated in rubber, and both end portions of the belt material are joined to manufacture an endless conveyor belt. And
Exposing the plurality of cores by peeling the rubber from both ends of the belt material in the longitudinal direction of the belt, and exposing the plurality of cores;
After the exposing step, the exposed plurality of cores in a state in which the ends of the exposed cores on the belt longitudinal direction one end side and the other end side of the belt material are butted. An arrangement step of placing a rubber member having a plurality of grooves into which the plurality of cores can enter and entering the grooves, and
After the placing step, the exposed cores are covered with a rubber material including the rubber member, and the plurality of cores and the rubber material are integrated to form both ends of the belt material in the longitudinal direction of the belt. A method for manufacturing a conveyor belt, comprising: a joining step for joining the parts. In the placing step,
2. The at least one of a plurality of abutting positions at which the ends of the plurality of exposed cores on the one end side and the other end side abut each other are different from each other in the belt longitudinal direction. Conveyor belt manufacturing method. In the placing step,
A plurality of abutting positions where the exposed ends of the plurality of cores on the one end side and the other end side are abutted are the base ends of the exposed cores on the one end side. The abutting position located in the vicinity and the abutting position located in the vicinity of the base ends of the exposed cores on the other end side are alternately arranged in the belt width direction. The manufacturing method of the conveyor belt of description.   A plurality of cores arranged in the belt width direction and extending in the longitudinal direction of the belt are encapsulated in rubber, and the plurality of core bodies have a butting structure and have a plurality of grooves in the coupling portion of the belt. A conveyor belt, which is disposed on a rubber member and does not use cement in the joint portion.

Images