WO2014024777A1

WO2014024777A1 - Method for joining conveyer belt

Info

Publication number: WO2014024777A1
Application number: PCT/JP2013/070925
Authority: WO
Inventors: 剛侯
Original assignee: 横浜ゴム株式会社
Priority date: 2012-08-10
Filing date: 2013-08-01
Publication date: 2014-02-13
Also published as: AU2013300679A1; RU2015107801A; CN104520213B; JP5966755B2; CN104520213A; JP2014037281A; RU2605224C2

Abstract

Provided is a method that is for joining a conveyor belt having as a core layer a steel cord and that can increase the quality of the join and reduce the joining work time for the ends in the lengthwise direction of the belt. The core layer (1a) is formed in a manner so as to be exposed ahead of time at the ends (1A) in the lengthwise direction of the belt main body (1), the top of the core layer (1a) is covered by a peeling member (5), and a cover rubber (3a, 3b) is laminated to the top of the peeling member (5), in which state the belt main body (1) is vulcanized/molded; the peeling member (5) is peeled, eliminating the cover rubber (3a, 3b) laminated onto the peeling member (5) and exposing the core layer (1a); the steel cord (1b) of the core layer (1a) to which to join to is inserted into the steel cord (1b) that is of the exposed core layer (1a) and of which alternate strands in the belt width direction have been severed to a predetermined length; and after laminating a cushion rubber (2) and a cover rubber (3a, 3b), the result is vulcanized, thus joining the core layers (1a) to each other.

Description

Conveyor belt joining method

The present invention relates to a method for joining conveyor belts having a core layer formed by arranging a plurality of steel cords side by side, and more particularly, shortening and joining time of joining work at the longitudinal ends of the conveyor belt. It is related with the joining method of the conveyor belt which can aim at the quality improvement of a part.

A conveyor belt having a core layer formed of a steel cord is stretched between a driving roller and a driven roller installed at the front and rear portions of the belt conveyor device. And it is supported by the several guide roller arrange | positioned between a drive roller and a driven roller. If it is damaged after use for a certain period of time or during use, the entire conveyor belt must be replaced or repaired by cutting off the damaged part and joining a new conveyor belt to the end of the belt in the longitudinal direction. (For example, refer to Patent Documents 1 and 2).

Such exchanging and repairing work of the conveyor belt has been performed exclusively at the site where the belt conveyor is used. For example, the following (1) to (5) work steps are used to join the longitudinal ends of a conveyor belt having a core formed by arranging a plurality of steel cords side by side.
(1) Cutting process of the core at the longitudinal end of the belt body (2) Buffing process of the surface finishing portion of the cut core (3) cementing process of the joint (4) End of the belt body in the longitudinal direction Molding process (cover rubber sheet + cushion rubber sheet + filling rubber + cushion rubber sheet + cover rubber sheet molding process)
(5) The process of laminating the longitudinal end portions of the molded belt main body, and joining the laminated portions by vulcanization adhesion while heating and pressurizing with a vulcanizer

In the conventional work process described above, the troublesome work of cutting out the steel cords at the end of the belt body in the longitudinal direction one by one is performed. At the site where the conveyor belt is used, there are limitations in terms of work space and processing equipment, so that there is a problem that it takes a particularly long time to cut out the steel cord.

Also, the steel cord cutting work takes longer as the cover rubber is thicker. For this reason, adverse effects on the quality of the joint portion of the conveyor belt are increased, such as a reduction in the joining strength due to the entry of dust and moisture into the joint portion during operation.

Japanese Unexamined Patent Publication No. 11-130220 Japanese National Table 2002-539383

SUMMARY OF THE INVENTION An object of the present invention is to provide a conveyor belt having a core layer formed side by side with a plurality of steel cords that can shorten the joining operation time at the longitudinal end of the conveyor belt and improve the quality of the joined portion. A bonding method is provided.

In order to achieve the above object, a method for joining conveyor belts according to the present invention is a method for joining conveyor belts having a core layer formed by juxtaposing a plurality of steel cords. The core layer at the end is formed so as to be exposed in advance, and the core layer formed so as to be exposed is covered with a peeling member, and the cover rubber is laminated on the peeling member in a belt The body is vulcanized and molded, and when the lengthwise ends of the belt body are joined, the peeling member is peeled off to remove the cover rubber laminated on the peeling member, and this peeling The core layer covered with the member is exposed, and the steel cord of the exposed core layer is cut every other length in the belt width direction by a predetermined length, and between the cut steel cord, The steel cord of the other core layer is inserted, and cushion rubber and cover rubber are laminated on the portion where the steel cord is inserted, and then vulcanized to bond the core layers together. To do.

Here, only the core layer at one end in the length direction of the belt main body is formed so as to be exposed in advance, and the core layer formed so as to be exposed is covered with a peeling member. The belt main body can be vulcanized and molded with the cover rubber laminated on the peeling member. Alternatively, the core body layer at both ends in the length direction of the belt body is formed so as to be exposed in advance, and the core layer formed so as to be exposed is covered with a peeling member, and the peeling member The belt body can be vulcanized and molded with a cover rubber laminated thereon. The length of the core layer formed so as to be exposed in advance is set to 0.5 m to 3.0 m, for example.

According to the present invention, the core layer at least at one end in the length direction of the belt body is formed so as to be exposed in advance, and the exposed core layer is covered with the peeling member. Since the belt main body is vulcanized and molded with the cover rubber laminated on the peeling member, a necessary conveyor belt (belt main body) is prepared in advance at the belt manufacturing factory or the like, not at the site where the conveyor belt is used. be able to. And when joining the length direction edge part of this belt main body, by peeling off the said peeling member, the cover rubber laminated | stacked on this peeling member was removed, and the said covering member was covered with this peeling member The core layer is exposed, the steel cord of the exposed core layer is cut to a predetermined length every other length in the belt width direction, and the other core layer to be joined is sandwiched between the cut steel cords. A steel cord is inserted and a cushion rubber and a cover rubber are laminated on the portion where the steel is inserted, and then vulcanized to join the core layers together. Therefore, the troublesome work of cutting the steel cord performed at the site where the conveyor belt is used can be reduced.

Therefore, compared to the conventional method, it is possible to significantly reduce the time for joining the end portions of the conveyor belt in the longitudinal direction. Further, as the joining work time is shortened, the risk of dust and moisture entering the joined part during the work is reduced. Further, since the buffing process and the like can be simplified, it is advantageous to improve the quality of the joint.

FIG. 1 is a schematic configuration diagram of a belt conveyor device. FIG. 2 is a perspective explanatory view illustrating the end portion in the length direction of the belt body processed using the present invention. FIG. 3 is an explanatory view illustrating the belt main body before drawing into the belt conveyor device in a cross-sectional view. FIG. 4 is an explanatory view illustrating, in a cross-sectional view, a step of exposing the core layer at the end in the length direction of the belt main body after being drawn into the belt conveyor device. FIG. 5 is an explanatory view illustrating the end in the length direction of the belt main body with the core layer layer exposed in plan view. FIG. 6 is an explanatory view illustrating the process of joining exposed core layers in plan view. FIG. 7 is an explanatory view illustrating, in plan view, a joining step when only the core layer at one end in the length direction of the belt main body is exposed in advance.

Hereinafter, a method for joining conveyor belts according to the present invention will be described based on embodiments shown in the drawings.

As illustrated in FIG. 1, the conveyor belt (belt main body 1) is stretched between a driving roller 4A and a driven roller 4B installed at the front and rear portions of the belt conveyor device. The belt body 1 is wound around a driving roller 4A and a driven roller 4B, and a plurality of guide rollers 4C disposed between the driving roller 4A and the driven roller 4B.

As illustrated in FIG. 2, the conveyor belt (belt body 1) targeted by the present invention is a conveyor belt having a core layer 1a formed by arranging a plurality of steel cords 1b side by side.

In the present invention, as illustrated in FIG. 3, the core body layer 1 a of at least one end 1 </ b> A in the length direction of the belt body 1 is formed so as to be exposed in advance. The length L of the core layer 1a formed so as to be exposed in advance is preferably set to 0.5 m to 3.0 m. The reason is to ensure the adhesiveness of the endless joint based on the strength of the belt specified in the steel cord conveyor belt of JIS K6369-2007.

Next, both surfaces of the core layer 1a formed so as to be exposed are covered with the peeling member 5, and a

cover rubber

3a, 3b which is an unvulcanized rubber is laminated on the peeling member 5. . Since the steel cord 1b is covered with the cushion rubber 2, both surfaces of the cushion rubber 2 are covered with the peeling member 5 in this embodiment. The belt body 1 in this state is vulcanized and molded in advance by a vulcanizer or the like.

As the peeling member 5, one selected from a heat-resistant sheet-like, tape-like or film-like member that does not adhere to the member constituting the belt main body 1 and is not fused during vulcanization is used. Specifically, as the peeling member 5, a vulcanized or unvulcanized rubber sheet, a release sheet made of a fluororesin, a polyethylene sheet, or the like is used.

Then, as illustrated in FIG. 4, the belt body 1 is pulled into the belt conveyor apparatus and set at the site where the conveyor belt is used. Next, the peeling member 5 embedded in the belt body 1 is peeled off from the belt body 1. Thereby, the

cover rubbers

3a and 3b laminated on the peeling member 5 can be easily removed. Along with this, both surfaces of the core body layer 1a covered with the peeling member 5 are exposed. The cushion rubber 2 covering the core layer 1a is appropriately removed.

Next, as illustrated in FIG. 5, every other steel cord 1b of the exposed core layer 1a is cut in a predetermined length (the length of about L described above) in the belt width direction. As illustrated in FIG. 6, the other core layer 1a to be joined is also exposed in the same manner as the one core layer 1a, and the steel cords 1b are cut every other length in the belt width direction by a predetermined length.

Then, the steel cord 1b between the cut steel cords 1b of the other core body layer 1a is inserted between the cut steel cords 1b of one core body layer 1a. Cushion rubber 2 and

cover rubbers

3a and 3b are laminated on the portion where the steel cords 1b are inserted by applying an adhesive Q or the like. Next, a portion where the cushion rubber 2 and the

cover rubbers

3a and 3b are laminated is sandwiched between vulcanization molds, and heated and pressed at a constant temperature for a certain period of time, thereby vulcanizing and bonding to the core layer 1a (the length of the belt body 1). The end portions 1A) are joined together.

As described above, according to the present invention, the core layer 1a of the longitudinal end 1A of the belt body 1 is formed in advance so as to be exposed, and the core layer 1a formed so as to be exposed is formed on the core layer 1a. Since the belt main body 1 is vulcanized and molded in a state where it is covered with the peeling member 5 and the

cover rubbers

3a and 3b are laminated on the peeling member 5, the conveyor belt (belt main body 1) is previously set in a belt manufacturing factory or the like. Can be prepared. And when joining 1 A of longitudinal direction edge parts of this belt main body 1, the

cover rubber

3a, 3b laminated | stacked on the peeling member 5 can be removed by peeling off the peeling member 5. FIG. Thereby, the core layer 1a covered with the peeling

members

3a and 3b can be easily exposed.

And since the steel cord 1b of the exposed core layer 1a is cut every other predetermined length in the belt width direction, it is carried out at the site where the conveyor belt is used as in the past, where space and processing facilities are limited. The troublesome work of cutting out the steel cord 1b can be reduced. Therefore, compared to the conventional method, it is possible to significantly shorten the time for joining the end portion 1A in the longitudinal direction of the conveyor belt. Further, as the joining work time is shortened, the risk of dust and moisture entering the joined part during the work is reduced. Further, since the buffing process and the like can be simplified, it is advantageous to improve the quality of the joint.

When the length of the belt conveyor device is short and the overall length of the conveyor belt (belt body 1) is short, the circumference of the endless belt body 1 can be accurately grasped in advance. There is also a take-up mechanism that adjusts the length by moving the driving roller 4A and the driven roller 4B in the longitudinal direction.

Therefore, in such a case, as in this embodiment, the core body layer 1a at both end portions 1A in the length direction of the belt body 1 is formed in advance so as to be exposed. The belt body 1 can be vulcanized and molded in a state where the core layer 1 a is covered with the peeling member 5 and the

cover rubbers

3 a and 3 b are laminated on the peeling member 5.

On the other hand, when the length of the belt conveyor device is long and the entire length of the conveyor belt (belt body 1) is long, it is difficult to accurately grasp the circumference of the endless belt body 1 in advance. Further, there is no sufficient take-up mechanism for adjusting the length by moving the driving roller 4A and the driven roller 4B in the longitudinal direction.

Therefore, as illustrated in FIG. 7, only the core layer 1 a at one end 1 </ b> A in the length direction of the belt body 1 is formed in advance so as to be exposed. Then, the core layer 1a formed so as to be exposed is covered with the peeling member 5, and the belt body 1 is vulcanized and molded with the

cover rubbers

3a and 3b laminated on the peeling member 5. . The other core layer 1a to be joined is cut out of the steel cord 1b at the site where the conveyor belt is used as usual.

Then, the steel cord 1b between the cut steel cords 1b of the other core body layer 1a is inserted between the cut steel cords 1b of one core body layer 1a. Cushion rubber 2 and cover

rubbers

3a and 3b are laminated on the portion where the steel cords 1b are inserted by applying an adhesive Q or the like. Next, the portion where the cushion rubber 2 and the

cover rubbers

3a and 3b are laminated is sandwiched between vulcanization molds, and heated and pressurized at a constant temperature for a certain period of time so that the core layer 1a (the belt body 1) The lengthwise ends 1A) can also be joined together.

For example, the steel cord conveyor belt of JIS K6369-2007 is called ST-1000, and the number of steel cords with a conveyor belt (belt body 1) width of 900 mm and a diameter of 4.3 mm is 72, Compared with the conventional method, the example in which the lengthwise ends of the conveyor belt (belt body 1) are joined to each other in the longitudinal direction of the conveyor belt having a thickness of 16.3 mm and a cover rubber thickness of 6 mm is illustrated in FIG. By applying the present invention, it was confirmed that the work time can be reduced to about 2/3 including the preparation time.

DESCRIPTION OF SYMBOLS 1 Belt main body 1a Core body layer 1b Steel cord 1A End part of belt main body in length direction 2

Cushion rubber

3a, 3b Cover rubber

4A Driving roller

4B Follower roller

4C Guide roller 5 Peeling member Q Adhesive

Claims

In the method of joining a conveyor belt having a core layer formed side by side with a plurality of steel cords, the core body layer at least one end in the length direction of the belt body is formed so as to be exposed in advance. Cover the core layer formed so as to be exposed with a peeling member, and vulcanize and mold the belt body with the cover rubber laminated on the peeling member. When the parts are joined, the peeling member is peeled off to remove the cover rubber laminated on the peeling member, and the core layer covered with the peeling member is exposed and exposed. Cut the steel cord of the core layer every other length in the width direction and insert the steel cord of the other core layer to be joined between the cut steel cords. After stacking a cushion rubber and cover rubber on the entering allowed portion, the joining method of the conveyor belt, characterized in that bonding the core layer to each other by vulcanizing.
Only the core layer at one end in the length direction of the belt main body is formed so as to be exposed in advance, and the core layer formed so as to be exposed is covered with a peeling member. The method for joining conveyor belts according to claim 1, wherein the belt main body is vulcanized and molded with a cover rubber laminated thereon.
A core layer at both ends in the length direction of the belt body is formed so as to be exposed in advance, and the top of the core layer formed so as to be exposed is covered with a peeling member, and on the peeling member The method for joining conveyor belts according to claim 1, wherein the belt main body is vulcanized and molded with the cover rubber laminated.
4. The method of joining conveyor belts according to claim 1, wherein a length of the core layer formed so as to be exposed in advance is set to 0.5 m to 3.0 m.