JP2002013593A - Junction structure for resin belt and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a junction structure for resin belt wherein noise generation is reduced and durability is enhanced by improving a conventional junction structure. SOLUTION: Each cover layers 4 of both ends of resin belt 1 stretching in strip shape is separated by specified length from the end face, lacing hooks 5 are driven and a joint member 6 is inserted for connection, one face side of the junction is covered with cover layer 4a of a thermoplastic resin member, the other face side thereof is fully covered with a canvas member 8, and the thermoplastic resin member is packed in the region excluding the space occupied by the joint member 6 and is formed as a packed space 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure of a resin belt and a method of manufacturing the same, and more particularly, to a resin belt for joining a resin belt composed of a core body canvas layer and a resin cover layer endlessly on site. And a method of manufacturing the same.

[0002]

2. Description of the Related Art Conveyor belts are usually long and wide.
With a double-supported structure, it cannot be easily wound around like a pulley of a cantilever structure like a transmission belt. Therefore, in order to wind the conveyor belt, a joint structure in which a cutting scale is joined at the site or a lacing hook is driven into the end and a connecting member is inserted and connected is formed in advance. In such a joint structure in which the racing hook is driven, the metal racing hook exposed on the pulley or the table surface directly hits the belt during running of the belt and generates noise or damages them. Or let it.

In order to solve such a problem, Japanese Patent Publication No. 61-6344, Japanese Utility Model Publication No. 5-44905, Japanese Patent Application No. 10-182964, and the like have been proposed.

[0004]

In the above joint structure, the upper and lower cover rubber portions at both ends of the rubber belt are cut so as to expose the core body canvas, and the cover rubber portion is cut off. Both ends are opposed to each other and belt lacing is driven in, a common mandrel is inserted to provide a metal joint,
Cover both sides of the metal joint with canvas and cover the upper and lower parts.
The rubber part is filled with unvulcanized rubber and rubber is molded by integral vulcanization. This structure is not intended to be cut and connected on-site, the filling of the metal joints is inadequate, and the cut and used deteriorates its durability. The above joint structure,
A part of the cover material is adhered to the main body belt of the connecting portion so as to cover it. This structure is easy to peel off at the interface between the main body belt and the cover material, and has poor durability. In the above joint structure, the cover layer is peeled from the main body belt, and the peeled cover is removed.
Is re-welded. The length of the peeled cover layer is the same as the end of the belt and does not extend to the metal racing hook, so that it is not sufficiently covered, and the suppression of noise and the durability are insufficient.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a resin belt joint structure in which a conventional conveyor belt joint structure is improved, noise generation is reduced, and durability is improved, and a method of manufacturing the same.

[0006]

According to a first aspect of the present invention, as a means for achieving the above object, there is provided a joining structure of a resin belt. A resin belt joining portion structure which is formed into an annular shape by driving in a comb shape, inserting the lacing hooks at both ends of each other and inserting the connecting member,
The above-mentioned lacing hooks, which are provided by peeling the cover layers at both ends from the ends by a predetermined length, are covered with a thermoplastic resin member on one side and a canvas member on the other side. It is characterized in that the entire surface is covered and the thermoplastic resin member is filled in a portion except for a space occupied by the connecting member.

According to the joint structure of the resin belt according to the first aspect, if the belt developed in a belt shape is connected in a ring shape on site, one surface of the racing hook is covered with the resin, The other surface is covered with a canvas member, and the periphery thereof is filled with a resin used for the covering. As a result, in addition to being easily connectable on site, almost the entire surface of the racing hook is covered, so that the strength can be increased and the racing hook can be pulled, pulled, or lowered during belt operation. Without hitting the floor, noise can be reduced and durability can be improved.

According to the second aspect of the present invention, the connecting member can be easily extracted at the time of manufacturing the above-mentioned joint structure, and the productivity can be improved.

According to a third aspect of the present invention, as a means for achieving the above object, a method for manufacturing a resin belt joint structure according to the first aspect is provided. The cover layers at both ends of one side of the resin belt are peeled off from the ends by a predetermined length, and a racing hook is driven into each of the core body fabric layers at both ends, and the both ends are abutted. A metal fitting joining step for inserting the connecting member, and a thermoplastic resin member of a predetermined size is preliminarily welded to the surface from which the cover layer has been peeled off so as to cover and cover the driven racing hook; A molding step of preliminarily welding a canvas member of a predetermined size on the surface of the other core body canvas layer, inserting the molded body obtained in the step into a press, and heating and pressing the thermoplastic resin member. Fill without gaps Forming a cover resin layer and molding into a solid integrated structure, separating the connecting member from the solid integrated structure, and welding the thermoplastic resin member welded to one surface and the other surface; And a dividing step of cutting the fabric member in the width direction of the center and separating the solid integrated structure so as to form end portions on the left and right sides.

[0010] According to the method for manufacturing a joint portion of a resin belt according to the third aspect, the entire surface on one side of the racing hook can be covered with the resin, and the entire surface on the other side can be covered with the resin. It can be covered with a canvas member. In addition
The resin around the sing hook is filled with the resin used for coating. As described above, almost the entire surface of the racing hook can be covered, so that the strength can be increased, and the racing hook does not hit the pulley, the table or the roller during belt operation, and the noise is reduced. Can be made and durability can be improved.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a joint structure of a resin belt, since a release agent is applied to a connecting member inserted into the lacing hook so that the connecting member can be easily separated. It becomes easy and productivity can be improved.
Furthermore, a belt with good durability and low noise generation can be manufactured.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment embodying the present invention will be described. FIGS. 1 to 4 are views for explaining one embodiment of a joint structure of a resin belt and a method of manufacturing the same according to the present invention. FIG. 1 is a sectional view showing the joint structure of the resin belt, and FIG. FIG. 3 is a plan view showing the structure of the joint in a manufacturing process, and FIG. 3A is a cross-sectional view showing a state in which the cover layer has been peeled off by a predetermined length. 4B is a cross-sectional view showing a state where the connecting member is inserted and connected, FIG. 4 is a cross-sectional view of the joint structure in the manufacturing process following FIG. 3, and FIG. FIG. 3D is a cross-sectional view showing a state of covering, FIG. 4D is a cross-sectional view showing a state of covering, and FIG.

The resin belt 1 of this embodiment is composed of a core body canvas layer 2, 2, an adhesive layer 3 for bonding the core body canvas layers 2, 2, and a cover layer 4 of a thermoplastic resin. . Lacing hooks 5 are inserted into both ends of the cut resin belt 1 into the core body fabric layer 2 at intervals at a comb-shaped interval, and the connecting hooks 5 are inserted into the spaces. Are linked. One surface of the racing hook 5 is covered with a thermoplastic resin member to form a coating layer 4a, and a space formed around the racing hook 5 at both ends is filled with a thermoplastic resin. Thus, a filling space 7 is formed. The other side of the racing hook 5 opposite to the cover layer 4 is entirely covered with a canvas member 8 welded near the end to form a joint.

The core body fabric layer 2 of the resin belt 1 is formed, for example, by
Woven fabrics such as plain weave, twill weave, satin weave and the like are impregnated with a treatment solution or coated to obtain a 0.2 to 1.0 m each.
m. As a material of the canvas, a fiber with low elongation, such as a cotton fiber, a polyester fiber, an aromatic polyamide fiber, and a nylon fiber, is preferable. As a treatment liquid for impregnating the woven cloth, a thermoplastic resin having the same affinity as the cover layer 4 is used. When laminating a multi-layered core fabric layer 2, an adhesive layer 3 is interposed. The adhesive layer 3 for adhering the core body canvas layer 2 may be composed of only the above-mentioned woven fabric treatment liquid or a normal adhesive. In short, any material that does not cause peeling of the belt may be used.

The cover layer 4 is made of a thermoplastic resin, such as a polyurethane resin, a vinyl chloride resin, a polyamide resin, a polyimide resin, a polyester resin, or a polyolefin resin, which is easy to manufacture and has various properties. can give. The thickness of the cover layer 4 is 0.9 mm to 5.
0 mm, and the total thickness of the belt is 1.4 to 6.0 mm.

The racing hook 5 is a rod-shaped member made of metal and formed in a substantially U-shape and having a circular cross section. The tip of the racing hook 5 can be fixed by being driven into the exposed core body fabric layer 2 at the belt end. Are bent in directions facing each other. The material and dimensions depend on the belt used,
Examples of the material include steel, stainless steel, and those obtained by plating other metals. 0.4 diameter
Approximately 1.2 mm is used. The lacing hooks 5 are inserted into both ends of the belt 1 at predetermined intervals of 1.0 to 4.0 mm over the entire length in the width direction to form a comb shape. The parts are abutted to form a space penetrating in the width direction. The connecting member 6 is inserted into this space to connect the belt ends.

The connecting member 6 is inserted into a space formed between the alternately inserted lacing hooks 5 at the end of the belt, and the cross section around which the lacing hook 5 rotates is circular or oval. Shaped rod-shaped member. The diameter is 0.6 to 2.5 mm depending on the required tensile strength of the belt. The connecting member 6 is preferably coated with a commonly used release agent such as stearic acid, a metal salt thereof, waxes, silicone, etc., because the ends can be easily separated and the production can be facilitated. .

A filling space 7 around the racing hook 5 which is not occupied by the connecting member 6 is formed by filling a thermoplastic resin. When the covering layer 4a is formed on the surface of the core body fabric layer 2 by heating and pressurization on the substantially same plane as the cover layer, the filling space 7 is filled with the molten thermoplastic resin from around the racing hook 5 by the connecting member 6. It is formed around the periphery. Therefore, the filling space 7 is formed integrally with the coating layer 4a using a thermoplastic resin.

On the other side of the racing hook 5 opposite to the coating layer 4a, a canvas member 8 is adhered to cover the entire surface (about 10 to 30 mm from the belt end). The canvas member 8 is not particularly limited as long as it can be used for a belt, and may be the same as the core body canvas layer 2. The adhesive is not particularly limited, and is a polyurethane-based adhesive, a vinyl-based adhesive, a plastic-based adhesive such as polyimide or polyester, a rubber-based adhesive using natural rubber, styrene-butadiene rubber, nitrile rubber, or other rubber. Agents and the like are used.

As described above, one surface of the racing hook 5 is covered with the thermoplastic resin on substantially the same plane as the cover layer to form the coating layer 4a, and the surrounding space is filled with the thermoplastic resin. To form a filling space 7 of a thermoplastic resin,
The other surface is entirely covered with a canvas member 8 welded near the end to form a joint. Since the connecting member 6 is inserted into the hole between the racing hooks 5 and the ends are connected to form a belt, the strength can be increased.
The racing hook does not hit the pulley, table or roller during belt operation, so that noise can be reduced and durability can be improved.

Next, FIGS. 3 and 4 show a method of manufacturing the joint structure of the resin belt constructed as described above.
This will be described below. First, an adhesive layer 3 between the core body canvas layers 2 and 2
The cover layer 4 having a predetermined length (30 to 80 mm) is formed from a resin belt material having a cover layer 4 provided on one surface.
Is peeled off, and a stripping portion 4b in which the core body canvas layer 2 is exposed is provided. Thereafter, the wafer is cut in the width direction along the line XX in FIG.

Next, the racing hooks 5 are driven into the both end portions at a predetermined interval, and are inserted into each other and butted.
The connecting members 6 are inserted to connect the belt ends to form an annular belt (FIG. 3B). At this time, a silicone-based release agent is applied to the connecting member 6 so that it can be easily removed even after the thermoplastic resin is welded.

Next, the peeling portion 4b from which the cover has been peeled off
A thermoplastic resin sheet of the same material as that of the cover layer 4 is placed so as to cover the joint, and the material forming the canvas 8 on the back is also applied to the back of the joint (FIG. 4 (c)). Temporarily fix it to the belt main body by heating it. At this time, a thermoplastic resin sheet having a large thickness is used so that it is substantially flush with the cover layer 4 even if it flows into a space around the racing hook 6 or the like during welding. The canvas member has a size to cover the belt end.

Next, using a heating press, the thermoplastic resin member is welded, the canvas 8 is welded, and at the same time, it is made to enter the space around the racing hook 5 to form the filling space 7 (FIG. 4 (d)). )). Next, along the line YY in FIG.
The covering layer 4a and the canvas member 8 on the front and back sides are cut in the width direction, respectively. At this time, work is performed so as not to damage the racing hook. Next, the connecting member 6 is pulled out,
The joining portion is separated and formed into a band shape (FIG. 4E). At this time, if necessary, the filling layer filling the space is also cut in the width direction along the cutting line.

It should be noted that the present invention is not limited to the above-described embodiment, but can be modified without departing from the spirit of the present invention. For example, the present invention can be applied to a resin belt having a cover layer on both sides, or a resin belt having a core body canvas layer on both sides.

[0026]

EXAMPLE A plain woven fabric made of polyester fiber was used as a core body canvas, a polyurethane resin member having a thickness of 2.1 mm was used as a cover layer, and a polyester canvas was welded with a total length of 30 mm as a canvas member, and the width was 100 mm. Length 17
A 00 mm conveyor belt having the joint structure of the present invention was manufactured. Using this belt, a running test was performed with a running test apparatus as shown in FIG. The pulley diameter of the running test device is 60 mm in diameter, and the belt speed is 100 m / mi.
n, the tension was 4.9 KN / m, the running time was 200 hours, and the total number of bending of the pulley at this time was 3.5 million times. For comparison, as a conventional example, a running test was carried out using a joint structure in which the same resin belt as in the above embodiment was cut, a racing hook was directly driven, and a connecting member was inserted. As a result, the belt of this embodiment is
There was no noise generated when the single hook hit the pulley, and there was no damage. In the comparative product, the bent portion of the racing hook was worn and cut off halfway.

[0027]

According to the joint structure of the resin belt of the present invention, the lacing hook can be pulled or pulled during belt operation.
Without hitting a bull or a roller, noise can be reduced and durability can be improved. According to the second aspect of the present invention, the connecting member can be easily separated, the labor for manufacturing can be reduced, and the productivity can be improved.

According to the manufacturing method of the third aspect, the entire surface on the cover layer side can be covered with the resin and
The periphery of the sing hook can be filled with the resin used for coating.
In this way, almost the entire surface of the racing hook can be covered, so that a belt having a high-strength, low-noise, and highly durable joint structure can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a joint structure of a resin belt according to the present invention.

FIG. 2 is a plan view partially showing a cross section of the joint.

3A and 3B are views showing a structure of a joint portion in a manufacturing process, wherein FIG. 3A is a cross-sectional view showing a state where a cover layer is peeled off by a predetermined length, and FIG. It is sectional drawing which shows the state which connected.

FIG. 4 is a cross-sectional view of the joint structure in the manufacturing process following FIG. 3, wherein FIG. 4 (c) is a cross-sectional view showing a state where both surfaces of the racing hook are covered, and FIG. (E) is a cross-sectional view showing one cut end.

FIG. 5 is a schematic configuration diagram of a belt running test device.

[Explanation of symbols]

 1: resin belt 2: core body canvas layer 3: adhesive layer 4: cover layer 4a: covering layer 5: racing hook 6: connecting member 7: filling space 8: canvas member

Claims (4)

[Claims] A resin belt is formed by laminating a core body canvas layer on which at least one or more layers of heart body canvas are laminated, and a thermoplastic resin cover layer on one surface of the core body canvas layer. The belt is spread on both ends of the resin belt.
A resin belt joining structure in which a singing hook is driven into a comb shape, and the lacing hooks at both ends are inserted into each other to form a ring by inserting a connecting member, while the end is separated to form a band by extracting. Wherein the racing hooks provided by peeling and covering the cover layers at both ends from the ends by a predetermined length are coated on one side with the thermoplastic resin member and on the other side. The joint structure of a resin belt, characterized in that the entire surface is covered with a canvas member on the side, and the thermoplastic resin member is filled in a portion except for a space occupied by the connecting member. 2. The joint structure for a resin belt according to claim 1, wherein a release agent is applied to a connecting member inserted into the racing hook. 3. A resin belt comprising a core body canvas layer in which at least one or more core body canvas layers are laminated, and a thermoplastic resin cover layer laminated on one surface of the core body canvas layer. The belt is spread on both ends of the resin belt.
Manufacture of a resin belt joint structure in which a sing hook is driven into a comb shape, and the lacing hooks at both ends are inserted into each other and joined by inserting a connecting member, and the resin belt is separated freely by extracting the end. A cover layer at both ends of one surface of the resin belt is peeled off from each end by a predetermined length, and a racing hook is driven into each of the core body fabric layers at both ends, and A metal joining step of inserting the connecting member by abutting the portions, and a thermoplastic resin member of a predetermined size is preliminarily provided on the surface from which the cover layer has been peeled off so as to cover and cover the driven racing hook. A molding step of preliminarily welding a canvas member of a predetermined size on the surface of the other core body canvas layer, inserting the molded body obtained in the step into a press, and heating the molded body. Forming a coating resin layer by filling the thermoplastic resin member with no gap by pressure, and molding it into a solid integrated structure; separating the connecting member from the solid integrated structure and welding to one surface. A dividing step of cutting the thermoplastic resin member and the canvas member welded to the other surface in the center width direction and separating the solid integrated structure so as to form left and right ends. A method of manufacturing a resin belt joint structure. 4. The method according to claim 3, wherein a release agent is applied to the connecting member inserted into the racing hook.