JP2000344319A - Conveyor belt and its splicing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the splicing operation of conveyor belts easily and quickly without requiring any high degree of skillfulness of the operator. SOLUTION: At the terminating part of a conveyor belt 10, a coupling part 20 in meshing form as a whole is embedded previously when the belt 10 is manufactured, wherein the coupling part 20 includes a plurality of longitudinal wires 22 laid in line across the belt width and transverse wires 28 coupled with the longitudinal wires 22 laid at a specified pitch in the belt longitudinal direction where a loop 24 to form a threading hole 26 is provided at the forefront, and at the time of joining two belts, a coupling core material 32 is threaded through the holes 26 of the loops 24 in the coupling parts 20 of the belt terminating parts, and then the exposed portion of each coupling part 20 including the loop 24 is covered with protection rubber 34, and this joining together of two belt terminations is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor belt and a joining method thereof.

[0002]

2. Description of the Related Art
A method as shown in FIG. 3 is used as a belt joining method for joining both ends of a long-manufactured conveyor belt to make it endless or for adding a separate conveyor belt to an existing conveyor belt. I was

[0003] In the figure, reference numeral 200 denotes a reinforcing core layer;
Reference numerals 2204 denote an upper cover rubber and a lower cover rubber laminated by vulcanization bonding in a state of covering them. Here, the reinforcing core layer 200 is formed by laminating a plurality of core body canvases (here, four layers of core body canvases) 200a, 200b, 200c, and 200d.

In joining a conveyor belt having such a configuration, first, the belt is cut off as shown in (I) to form a step-like (here, step-like) joining surface as shown in FIG. Similarly, the mating surfaces to be joined to each other are similarly formed with correspondingly shaped step-shaped (here, step-shaped) joining surfaces, and thereafter, an adhesive is applied, and these joining surfaces are connected via the connecting rubber 206. The belt is joined by vulcanization and adhesion.

[0005] At the time of the belt joining, the step-like joining surface is formed specifically as follows. That is, first, a cut is made in only the upper cover rubber 202 in the belt width direction using a cut knife, and a cut is made in another position to the first core canvas 200a. The first core canvas 200a is partially exposed by being peeled off while being peeled from the starting point.

Further, a cut is made at another position to the second core canvas 200b, and a portion between the cuts is similarly peeled off to expose a part of the second core canvas 200b. In the same manner, the third core body canvas 200c and the fourth core body canvas 200d are partially exposed one after another.
A step-like joining surface is formed.

At the time of making a cut as described above,
Specifically, for example, when exposing the first core canvas 200a, the second core canvas 200b under the first core canvas 200b must not be damaged. Further, when exposing the second core canvas 200b, The lower third core fabric 200c must not be damaged. If the lower core fabric is damaged at that time, the belt may be broken at the damaged portion after the belt is joined.

Also, when performing the work of peeling a part of the belt after the above-mentioned cut is made, the peeling start portion, that is, the tip portion is raised with a hand hook or the like, and the belt is gradually peeled from the starting point. Even when the tip is raised by the hook or the like, damage to other parts must not be induced, and the peeling operation must be performed accurately. Such operations are extremely difficult operations, and are considered to be operations that can only be performed by professional workers having highly skilled skills.

Further, after a part of the belt is peeled off,
A buffing operation is performed to remove irregularities due to the rubber that has been torn off on the remaining surfaces of the core canvases 200a to 200d.
Od should not be damaged, and this operation was also a very difficult operation requiring skill. As described above, the belt joining by the above operation is not only a difficult operation that can be performed by a skilled person but also a long operation.

On the other hand, as a method of joining the conveyor belt,
In addition, a method using metal fittings is also performed. FIG. 4 shows an example of this. As shown in the drawing, in this joining method, a U-shaped bracket 208 is fixed to a belt terminal with a plurality of bolts 210 at a predetermined pitch in the belt width direction. By inserting a metallic connecting pin 214 into a through hole 212 formed in each metal fitting 208, the metal fittings 208 of each belt terminal are connected, thereby joining a pair of belt terminals.

However, in the case of the joining method using the metal member 208, the metal member 208 is projected on the belt surface, so that the cleaning of the belt surface cannot be sufficiently performed. There is a problem that the belt may be broken, and a gap is formed between the metal fittings 208, so that the transported article falls from the belt through the gap and accumulates downward. Furthermore, since the metal fitting 208 has high rigidity, there is a problem that the belt joint cannot follow the pulley shape well when the belt passes through the pulley.

[0012]

SUMMARY OF THE INVENTION A conveyor belt and a method for joining the same according to the present invention have been devised to solve such problems. According to a first aspect of the present invention, there is provided a conveyor belt having a reinforcing core layer and a cover rubber laminated so as to cover the reinforcing core layer. A plurality of vertical wires having a loop portion for forming a through hole at the tip are arranged in the belt width direction such that the loop portions are aligned, and embedded in the cross-section intermediate portion of the conveyor belt by vulcanization bonding, A connecting portion for joining the belt is provided in advance.

According to a second aspect of the present invention, in the conveyor belt according to the first aspect, the connecting portion is provided at a terminal portion in the longitudinal direction of the belt, and the loop portion is exposed to the outside in the longitudinal direction of the belt. There is a feature.

[0014] The conveyor belt of the third aspect is the first aspect of the invention.
3. In the conveyor belt according to any one of the items 2, the vertical wires in the connection portion are connected to each other by a plurality of horizontal wires arranged at predetermined intervals in a belt longitudinal direction inside the belt, and the vertical wires and the horizontal wires are connected to each other. Are characterized in that they are organized like a net as a whole.

According to a fourth aspect of the present invention, in the conveyor belt according to the third aspect, the vertical wire is formed of a stranded wire, and the horizontal wire passes through the stranded wire in a belt width direction. It is characterized by passing through.

According to a fifth aspect of the present invention, there is provided a method for joining a conveyor belt according to the first aspect of the present invention. With the loop portion of the vertical wire exposed to the outside, align the loop portion with the loop portion of the mating connection portion to be joined, and connect the connection core material to the through hole formed by those loop portions. A pair of connecting portions are connected to each other through the belt width direction, and thereafter, an exposed portion of each connecting portion including the loop portion is covered with a protective rubber.

[0017]

According to the present invention, a plurality of vertical wires having a loop portion at the end are arranged in the belt width direction and buried in the middle portion of the cross section, so that the connecting portion is provided in advance. In a state where the loops are exposed to the outside at the time of belt joining, they are aligned with the loops of the corresponding connecting parts on the mating side to be joined, and the connecting core material is inserted into the through holes formed by the loops. By passing through, the connecting portions are connected to each other, and belt joining can be performed. Further, the exposed portion of the connecting portion including the loop portion can be covered with a protective rubber to form a continuous belt conveying surface (claim 5).

According to the present invention, in order to expose the core canvas one by one at the time of belt joining, a cut knife is used to cut the belt accurately, and a part of the belt is peeled after the cut is made. The operation can be made unnecessary, so that the belt joining can be performed easily and in a short time without a highly skilled worker.

Further, since the connecting portion is buried inside the belt and is not exposed in a projecting manner on the belt surface, the belt surface can be easily and sufficiently cleaned.
In addition, unlike the joining method using the metal fittings shown in FIG. 4, the metal fittings do not wear or become fatigued to cause the belt to be cut, and the durability performance is improved.

Further, since the connecting portion is formed of a wire, the belt has good flexibility even in a portion where the connecting portion is buried, and therefore, the portion is repeatedly bent, thereby causing fatigue failure. Does not occur.

In the present invention, at the time of belt joining,
A portion exposed to the outside of the connecting portion can be covered with a protective rubber (claim 5), and thus, unlike the joining method shown in FIG. 4, no gap is formed in the joined portion. Therefore, there is no inconvenience that the transported material is spilled from the gap and accumulated downward when transporting the transported material.

According to a second aspect of the present invention, the connecting portion is provided at a terminal portion in the longitudinal direction of the belt, and a loop portion thereof is exposed to the outside in the longitudinal direction of the belt in advance. You can do this easily.

According to a third aspect, in the belt,
A plurality of vertical wires and a plurality of horizontal wires buried inside the belt are connected to each other, and the vertical wires and the horizontal wires constitute a net-like connecting portion as a whole. With this configuration, even when a pulling force acts on the vertical wire, the vertical wire can be prevented from coming off satisfactorily. That is, the pull-out resistance of the entire connecting portion can be effectively increased.

It is also possible to connect a plurality of vertical wires in the belt in the horizontal direction with a bar inside the belt, but in this case, the flexibility in the belt width direction is lost.
However, according to the third aspect, since each vertical wire is connected by a plurality of horizontal wires, there is an advantage that good flexibility in the belt width direction is secured.

According to a fourth aspect of the present invention, the vertical wire is formed of a stranded wire, and the stranded wire is passed through the vertical wire so as to penetrate the stranded wire in a belt width direction. Can be easily connected, and the connection strength can be made high.

In the present invention, when embedding the vertical wire, each of the plurality of wires having the loop portions at both ends is bent into a U-shape at an intermediate portion, and embedded in the belt in that state. And so on. In this way, it is possible to save the number of necessary wires and the trouble of burying the wires inside the belt.

On the other hand, regarding the lateral wires, one long wire is successively U-turned at both left and right ends in the belt width direction, and is buried inside the belt in this state to constitute the plurality of lateral wires. Can be. Also in this case, the number of necessary wires and the labor for embedding can be simplified.

In the present invention, a stretch conveyor belt, that is, a stock section of a predetermined length is stored in a storage section, and a belt that is stored in the stock section is sequentially pulled out to extend the length. It is suitable for application to a conveyor belt and a joining method thereof.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows both ends of the same conveyor belt or separate conveyor belts joined together. In FIG. 1, reference numerals 10 and 10 denote the same conveyor belt or different conveyor belts (hereinafter referred to as belts).
Numeral 12 is a reinforcing core layer of the belt 10, 14 and 16 are upper cover rubbers laminated so as to cover the reinforcing core layer 12,
Lower cover rubber. The reinforcing core layer 12 is formed by laminating a plurality of core canvases 18.

Reference numeral 20 denotes a connecting portion embedded in the end of the belt 10 in advance. The connecting portion 20 includes a plurality of vertical wires (here, steel wires) 22 arranged at a predetermined pitch in the belt width direction at an intermediate portion of the cross section of the belt 10, more specifically, at a portion between the core canvases 18. are doing.

Here, the vertical wire 22 has a loop portion 24 at the tip as shown in FIG. 2I, and the loop portion 24 is partially exposed outside the belt longitudinal direction. Almost the whole is buried inside the belt 10 by vulcanization bonding. Here, each loop portion 24 forms one row in the belt width direction, and has a through hole 26 formed inside each. These vertical wires 22 are made of stranded wires.

At the end of the belt 10, a plurality of horizontal wires 28 are embedded by vulcanization bonding at positions between the core canvases 18 in a state of being arranged at a predetermined pitch in the longitudinal direction of the belt. The plurality of horizontal wires 28 and the plurality of vertical wires 22 are connected to each other at intersections, and the connection portions 20 have a mesh structure by the vertical wires 22 and the horizontal wires 28.

The vertical wires 22 adjacent to each other in the belt width direction are connected by a U-shaped turn portion 30.
That is, two adjacent vertical wires 22 have loop portions 2 at both ends.
One wire 4 is bent in a U-shape at an intermediate portion.

On the other hand, the plurality of horizontal wires 28 that are adjacent to each other in the longitudinal direction of the belt are connected by a turn portion 30. That is, the plurality of horizontal wires 28 are formed by alternately bending one long wire into a U-shape at one end and the other end in the belt width direction.

In this embodiment, each horizontal wire 28 is formed of a stranded wire, and penetrates the vertical wire 22 also formed of a stranded wire in the belt width direction. Thus, the vertical wires 22 and the horizontal wires 28 are connected to each other (see FIG. 1B).

As shown in FIG. 1, the belts 10 and 1
0 is connected to each loop 2
4 are aligned and form one row in the belt width direction.
The through holes 2 formed inside the loop portions 24
6, a metal connecting core material (in this example, a rod shape) 32 is inserted, and the respective connecting portions 20 are connected in the belt longitudinal direction via the connecting core material 32. Further, the exposed portions of the connecting portions 20 are covered with a protective rubber 34.

FIG. 2 shows a specific belt joining method using the connecting portion 20. Hereinafter, the joining method will be specifically described. First, as shown in FIG.
Is exposed to the outside, the ends of the belt 10 in which the connecting portions 20 are embedded are opposed to each other, and the loop portions 24 of the connecting portions 20 and 20 are further connected as shown in (II) and (A). Align so as to form one line in the belt width direction.

Thereafter, as shown in (III), the connecting cores 32 are passed through the through holes 26 inside the loop portions 24, and the connecting portions 20 are connected via the connecting cores 32. Thereafter, (I)
As shown in V), the gap between the belt ends is filled with the unvulcanized protective rubber 34, and then vulcanized and bonded (preferably natural vulcanized bonding). Here, the pair of belt terminal portions are joined to each other. In addition, the connecting core material 3
The surface of 2 can be covered with rubber or resin to prevent the abrasion of the loop portion 24 and the connecting core material 32.

According to the present embodiment, a cut is made with a cut knife at the time of belt joining to expose the core body fabric 18 in a stepwise manner, or a part of the belt 10 is peeled off after the cut is made. Work can be eliminated,
Therefore, it is possible to perform the belt joining easily and in a short time even without a highly skilled worker.

Since the connecting portion 20 is buried inside the belt 10 and is not exposed to the belt surface in a protruding manner, the belt surface can be easily and sufficiently cleaned, and the metal fitting shown in FIG. The inconvenience that the metal fitting is worn or fatigued to cause the belt to be cut as in the joining method using No. 1 does not occur, and the durability thereof is also improved.

Further, since the connecting portion 20 is made of a wire, the flexibility of the belt 10 is good even at the portion where the connecting portion 20 is buried. Such a problem does not occur, and a sufficient joining strength can be given to a joining portion when the belt is joined. Further, since there is no gap at the belt joint, there is no inconvenience that the transported article spills out of the gap and accumulates downward when transporting the transported article.

In this embodiment, a plurality of vertical wires 22 and a plurality of horizontal wires 28 are connected to each other inside the belt 10, and the vertical wires 22 and the horizontal wires 28 constitute a net-like connecting portion 20 as a whole. Therefore, even when a pulling force acts on the vertical wire 22, the vertical wire 22 can be prevented from coming off satisfactorily. That is, the pull-out resistance of the entire connecting portion 20 can be increased.

The embodiment of the present invention has been described in detail above, but this is merely an example. For example, in the above example, the connecting portion 20 is embedded in the belt 10 between the core canvases 18, 18.
It is also possible to embed this between the 4 and the lower cover rubber 16.

In the above example, the connecting portion 20 is buried inside the belt 10 with the loop portion 24 exposed to the outside. In some cases, the entirety of the connecting portion 20 including the loop portion 24 is buried inside the belt 10. In this way, it is possible to bury the belt at a position where it is drawn in the belt longitudinal direction by a predetermined distance from the belt terminal at the time of manufacturing the belt.

By doing so, a portion of the belt 10 is later peeled off, and the loop portion 24 of the connecting portion 20 is exposed to the outside, so that the same portion can be joined to another belt. . In addition, the present invention can be configured and implemented in various modified forms and modes without departing from the spirit thereof.

[Brief description of the drawings]

FIG. 1 is a view showing a conveyor belt according to an embodiment of the present invention in a joining completed state.

FIG. 2 is an explanatory diagram of a belt joining method which is one embodiment of the present invention.

FIG. 3 is an explanatory view showing an example of a conventional belt joining method.

FIG. 4 is an explanatory diagram of an example different from FIG. 3 of the conventional belt joining method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Conveyor belt 12 Reinforcement core layer 14 Upper cover rubber 16 Lower cover rubber 20 Connection part 22 Vertical wire 24 Loop part 26 Through hole 28 Horizontal wire 32 Connection core material 34 Protective rubber

Claims (5)

[Claims] 1. A conveyor belt having a reinforcing core layer and a cover rubber laminated so as to cover the reinforcing core layer, wherein a through-hole is formed at a tip of a portion to be joined later to be joined. A plurality of vertical wires having loop portions to be formed are arranged in the belt width direction such that the loop portions are aligned, and buried in the intermediate portion of the cross section of the conveyor belt by vulcanization bonding, thereby connecting for belt joining. A conveyor belt provided with a part in advance. 2. The conveyor belt according to claim 1, wherein the connecting portion is provided at a terminal portion in the longitudinal direction of the belt, and the loop portion is exposed outside the longitudinal direction of the belt. Conveyor belt. 3. The conveyor belt according to claim 1, wherein the vertical wire at the connecting portion is
A conveyor belt comprising: a plurality of horizontal wires arranged at predetermined intervals in a longitudinal direction of a belt in a belt to be connected to each other, and the vertical wires and the horizontal wires are arranged in a net as a whole. 4. The conveyor belt according to claim 3, wherein the vertical wire is formed of a stranded wire, and the horizontal wire passes through the vertical wire in a state of penetrating the stranded wire in a belt width direction. Conveyor belt featured. 5. When joining the conveyor belt according to any one of claims 1 to 4, the loop portion of the longitudinal wire in the connecting portion is exposed to the outside, and the loop portion is to be joined. And connecting the pair of connecting portions to each other by passing a connecting core material through the through holes formed in the loop portions in the width direction of the belt, and then connecting the loop portions with a protective rubber. A method of joining conveyor belts, comprising: coating an exposed portion of each connecting portion.