JP2015081182A - Conveyor belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conveyor belt that has improved connection efficiency without aggravating the flexibility of an endless part.SOLUTION: In an endless conveyor belt 1 in which one end part and the other end part of each of a plurality of core body reinforcement layers 4a, 4b, 4c and 4d vertically stacked and buried between an upper surface cover rubber layer 2 and a lower surface cover rubber layer 3 are butted and joined, the butting positions A, B, C, and D of the respective core body reinforcement layers 4a, 4b, 4c, and 4d vertically stacked are made different from each other in the belt longitudinal direction. Also, the respective core body reinforcement layers 4a, 4b, 4c, and 4d are divided into a plurality of sections in the belt width direction, and the butting positions A1-A3, B1-B3, C1-C3, and D1-D3 of the respective sections E1, E2, and E3 are made different from each other in the belt longitudinal direction.

Description

  The present invention relates to a conveyor belt, and more particularly to a conveyor belt with improved joining efficiency without deteriorating the flexibility of an endless portion.

  In general, a conveyor belt has an endless structure in which a belt-like belt in which a cover rubber layer is laminated on the upper and lower sides of a core reinforcing layer is manufactured and one end and the other end of the belt-like belt are joined to form an endless structure. (For example, refer to Patent Document 1). As one of the methods for forming this endless structure, a so-called step splice method is known.

  In the step splice method, one end of a belt-like belt with a plurality of core reinforcing layers stacked is formed in a staircase shape with the end positions of the core reinforcing layers being different, and the other end is also formed in a staircase shape. To do. And the one end part and other end part which were formed in step shape are abutted and joined to each core reinforcement layer. Since the core reinforcing layer is abutted, the flexibility of the belt is excellent as compared with the case where the core reinforcing layer is overlapped and joined.

  In the endless structure formed by this step splice method, considering the position where each core reinforcement layer is abutted, the abutted core reinforcement layer is divided, so the tensile strength is zero, and other core reinforcement The layer will bear the tensile strength. That is, when n layers of core body reinforcing layers are laminated, the n-1 layer of core body reinforcing layer bears the tensile strength in calculation, and there is a problem that the joining efficiency (endless efficiency) is lowered. is there.

When selecting a conveyor belt, the tensile strength that takes into account the joining efficiency of the endless part is the standard. Can be. As a result, energy required for operating the conveyor belt can be reduced, contributing to energy saving and CO ₂ reduction.

JP 2008-050074 A

  An object of the present invention is to provide a conveyor belt with improved joining efficiency without deteriorating the flexibility of the endless portion.

  In order to achieve the above object, the conveyor belt of the present invention has one end and the other end of a plurality of core reinforcing layers that are embedded in an upper layer and a lower layer between a top cover rubber layer and a bottom cover rubber layer. In the endless conveyor belt where the parts are butted and joined, the abutting positions of the core reinforcing layers stacked vertically differ in the belt longitudinal direction, and the core reinforcing layers are in the belt width direction. It is divided into a plurality of parts, and the butting position of each divided part is different in the belt longitudinal direction.

  In the conveyor belt according to the present invention, the abutting positions of the core reinforcing layers stacked vertically are different in the belt longitudinal direction, and the abutting positions of a plurality of portions partitioned in the belt width direction are also the longitudinal direction of the belt. Since the directions are different, the butting positions where the tensile strength is calculated to be zero are distributed in the longitudinal direction of the belt. Therefore, the tensile strength does not become zero over the entire length in the belt width direction in each core reinforcing layer, and the tensile strength of one core reinforcing layer is not lost at the abutting position. As a result, the joining efficiency can be improved. Moreover, since each core reinforcement layer is abutted and joined, the flexibility of the endless portion is not impaired.

  It is also possible to make a specification in which the abutting position of each partitioned portion is most shifted to one side in the belt longitudinal direction at the center in the belt width direction. This stabilizes the balance in the belt width direction around the center in the belt width direction, thereby improving the straight travel performance during belt travel.

  Alternatively, the abutting position of each divided portion can be set to be sequentially shifted in the belt longitudinal direction from one end side in the belt width direction to the other end side.

  The number of partitions is set to 3 or more and 5 or less, for example. Thereby, joining efficiency can be improved effectively, without increasing the man-hour of an endless joining operation excessively.

It is a perspective view which illustrates the embodiment of the conveyor belt of the present invention in the state where it cut in the width direction. It is explanatory drawing which illustrates the butting position of a core reinforcement layer by cut | disconnecting the conveyor belt of FIG. 1 along a longitudinal direction. It is a top view which illustrates the butting position of a core body reinforcement layer. It is explanatory drawing which shows arrangement | positioning of the butting | matching position of the core reinforcement layer laminated | stacked up and down. It is a top view which shows another example of the matching position of a core body reinforcement layer.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

  As illustrated in FIG. 1, the conveyor belt 1 of the present invention has core reinforcing layers 4a, 4b, 4c and 4d extending in the belt longitudinal direction between the upper cover rubber layer 2 and the lower cover rubber layer 3. ing. That is, the upper cover rubber layer 2 and the lower cover rubber layer 3 are arranged above and below, respectively, across a plurality of (four layers in FIG. 1) core reinforcing layers 4a, 4b, 4c, and 4d. Further, on both outer sides in the width direction of the core body reinforcing layers 4a, 4b, 4c, and 4d, ear rubber parts 5 extending in the belt longitudinal direction to protect the ends of the core body reinforcing layers 4a, 4b, 4c, and 4d. Is arranged. In order to enhance adhesion between the upper surface cover rubber layer 2 and the core body reinforcing layer 4a, the lower surface cover rubber layer 3 and the core body reinforcing layer 4d, and between the core body reinforcing layers 4a, 4b, 4c and 4d. A coat rubber layer is provided.

  The upper cover rubber layer 2 is a surface on which a conveyed product is loaded when the belt travels. For example, a rubber composition made of diene rubber containing natural rubber and having good wear resistance with carbon black or the like is used. The lower cover rubber layer 3 is a surface that is supported by a carrier-side support roller when stretched between pulleys of a belt conveyor device, and is made of, for example, a diene rubber containing natural rubber, such as carbon black Thus, a rubber composition having good wear resistance is used. The rubber constituting the upper cover rubber layer 2 and the rubber constituting the lower cover rubber layer 3 can be made of the same material or different materials.

  The core reinforcement layers 4a, 4b, 4c, and 4d are core bodies that bear the tension when the conveyor belt 1 is stretched, and are configured by laminating a plurality of fiber reinforcement layers such as canvas. The material and number of layers of the core reinforcing layers 4a, 4b, 4c, 4d are determined by the required performance (rigidity, elongation, etc.) for the conveyor belt 1.

  The conveyor belt 1 of the present invention has an endless structure in which one end portion and the other end portion of a belt-like belt are joined to make an endless shape. In the joined portion, as illustrated in FIG. The butted positions A, B, C, and D of the laminated core reinforcing layers 4a, 4b, 4c, and 4d are different in the belt longitudinal direction.

  Further, as illustrated in FIG. 3, the core body reinforcing layer 4 a is divided into a plurality (three in FIG. 3) in the belt width direction, and the abutting positions corresponding to the divided portions E1, E2, and E3. A1, A2 and A3 are shifted from each other in the belt longitudinal direction. Each of the partitioned butting positions A1, A2, A3 is designed to extend in parallel to the belt width direction. The butting positions A1, A2, A3 can be inclined with respect to the belt width direction within a range of, for example, more than 0 ° and not more than 20 °. The other core reinforcing layers 4b, 4c, and 4d have the same structure as that of the core reinforcing layer 4a, and the butting positions B (B1, B2, B3), C (C1, C2, C3), and D (D1, D2), respectively. , D3).

  In this way, in addition to the fact that the butted positions A, B, C, and D of the core reinforcing layers 4a, 4b, 4c, and 4d that are stacked one above the other are different in the belt longitudinal direction, each core body reinforcing layer In the layers 4a, 4b, 4c, and 4d, the abutting positions A1 to A3, B1 to B3, C1 to C3, and D1 to D3 corresponding to the plurality of portions E1, E2, and E3 partitioned in the belt width direction are also arranged in the belt longitudinal direction. Since they are different, as shown in FIG. 4, the butting positions A, B, C, and D where the tensile strength becomes zero are dispersed in the belt longitudinal direction. The explanatory diagram of FIG. 4 shows two layers (core reinforcing layers 4a and 4b) out of the core reinforcing layers 4a, 4b, 4c, and 4d so that the positional relationship between the butting positions A and B can be easily understood. FIG. As shown in FIG. 4, the abutting positions A and B of the core reinforcing layers 4 stacked one above the other are different in the belt longitudinal direction, and the abutting positions A and B do not overlap each other (shown by a one-dot chain line). (Refer to the projection position of the butting position A in the core reinforcing layer 4b). Further, for example, on the surface X indicated by the broken line, the tensile strength is zero in calculation only in the abutting position B3 corresponding to the partitioned part E3 of the core reinforcing layer 4b. That is, when attention is paid to the two layers shown in FIG. 4, in the plane X, the core reinforcing layer 4 of 1 + 2/3 layers bears the tensile strength in calculation. Thus, even at the butting positions A, B, C, and D, the tensile strength of one layer of the core body reinforcing layers 4a, 4b, 4c, and 4d is not impaired by calculation as in the past. Therefore, the conveyor belt 1 of this invention can improve joining efficiency rather than the past, maintaining the outstanding flexibility by butt joining. If it is this structure, even if peeling occurs in any of the butting positions A1 to A3 (B1 to B3, C1 to C3, D1 to D3), the respective butting positions A1 to A3 (B1 to B3, C1 to C3) D1 to D3) are not continuous linearly in the belt width direction, and it can be expected to suppress the propagation of peeling. That is, it is possible to suppress a problem that peeling occurs at the abutting position A (B, C, D) all over the belt length direction.

  As illustrated in FIG. 5, the abutting positions A1, A2, and A3 corresponding to the divided portions E1, E2, and E3 of the core body reinforcing layer 4a are belt lengthwise from one end side to the other end side in the belt width direction. It is also possible to make the specification shifted in order in the direction. The other core reinforcing layers 4b, 4c, and 4d can have the same specifications. As shown in FIG. 3, when the belt width direction central portion (in the case of FIG. 3, the butting position A2) is most shifted to one side in the belt longitudinal direction, the belt width direction balance is centered on the belt width direction central portion. Is stable, it is possible to improve the straightness when the conveyor belt travels.

  Instead of extending the partitioned butting positions A1 to A3 (B1 to B3, C1 to C3, D1 to D3) in parallel to the belt width direction, a combination of those that are inclined with respect to the belt longitudinal direction is combined, The abutting position A (B, C, D) can be formed in a zigzag shape in plan view.

  The number of sections in the width direction in each of the core body reinforcing layers 4a, 4b, 4c, and 4d can be set as appropriate, but is set to 3 or more and 5 or less, for example. When the number of sections is less than 3, the effect of improving the joining efficiency is reduced. On the other hand, when the number of sections exceeds 5, the structure becomes complicated, and the man-hour for the endless joining work is excessively increased.

  Each core reinforcing layer 4a, 4b, 4c, 4d may be provided with a slit extending in the belt longitudinal direction in advance. When performing an endless joining operation, the core reinforcing layers 4a, 4b, 4c, and 4d are divided into a plurality of portions in the belt width direction by using the slits. In this case, the structure illustrated in FIGS. 3 and 5 and the like can be easily formed simply by changing the cutting position in the belt longitudinal direction for each portion previously divided by the slit.

DESCRIPTION OF SYMBOLS 1 Conveyor belt 2 Upper surface cover rubber layer 3 Lower surface cover rubber layer 4a, 4b, 4c, 4d Core body reinforcement layer 5 Ear rubber part A, B, C, D Butt position

Claims (4)

In an endless conveyor belt in which one end portion and the other end portion of a plurality of core reinforcing layers stacked and embedded between an upper surface cover rubber layer and a lower surface cover rubber layer are butted and joined to each other ,
The butt positions of the core reinforcing layers stacked in the vertical direction are different in the longitudinal direction of the belt, and the core reinforcing layers are divided into a plurality of parts in the belt width direction. A conveyor belt characterized by being different in the longitudinal direction of the belt.   2. The conveyor belt according to claim 1, wherein the abutting position of each of the divided portions is most shifted to one side in the belt longitudinal direction at the center in the belt width direction.   2. The conveyor belt according to claim 1, wherein the abutting positions of the respective divided portions are sequentially shifted in the belt longitudinal direction from one end side to the other end side in the belt width direction.   The conveyor belt according to claim 1, wherein the number of the sections is 3 or more and 5 or less.

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