JP4711490B2 - Joint structure of resin belt and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a resin belt joint structure and a method for manufacturing the same, and more particularly, to a resin belt joint structure for joining a resin belt composed of a core canvas layer and a resin cover layer endlessly in the field, and its manufacture. Regarding the method.
[0002]
[Prior art]
The conveyor belt is usually long and wide, has a double-sided structure, and cannot be wound as easily as a cantilevered pulley like a transmission belt. Therefore, in order to wrap the conveyor belt, a joining structure is formed in advance by joining a cutting scale at the site or driving a racing hook into an end portion and inserting and connecting a connecting member.
In such a joint structure in which the racing hook is driven in, the metal racing hook exposed to the pulley or the table surface directly hits the belt during running of the belt and generates noise or damages it. I will let you.
[0003]
Therefore, as a belt joint structure for solving such a problem, (1) Japanese Utility Model Publication No. 61-6344, (2) Japanese Utility Model Publication No. 5-44905, (3) Japanese Patent Application No. 10-182964 are proposed. ing.
[0004]
[Problems to be solved by the invention]
In the joint structure of (1) above, the upper and lower cover rubber portions at both ends of the rubber belt are cut so as to expose the core canvas, and both end faces of the core canvas with the cover rubber portion excised are opposed to each other. At the same time, a belt race is driven in, a common mandrel is inserted to provide a bracket joint, covered with canvas from both sides of the bracket joint, unvulcanized rubber is packed into the upper and lower cover rubber sections, and rubber is added together. Sulfur molding. This structure is not planned to be cut and connected on site, and the filling of the metal joint is insufficient, and the durability deteriorates when cut and used.
The joint structure of (2) is configured so that a part of the cover material is adhered and covered to the main body belt of the connecting part. This structure is easy to peel off at the interface between the main body belt and the cover material, and has poor durability.
The joint structure of (3) is configured such that the cover layer is peeled from the main body belt and the peeled cover is re-welded. The length of the peeled cover layer is the same as that of the belt end and does not extend to the metal racing hook, so that it is not sufficiently covered, and noise suppression and durability are insufficient.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a resin belt joint structure that improves the conventional joint structure of a conveyor belt, reduces the generation of noise, and improves durability, and a method for manufacturing the same.
[0006]
[Means for Solving the Problems]
The resin belt joint structure according to claim 1 of the present invention as means for achieving the above-described object is a method in which a lasing hook is driven in a comb shape at both ends of a resin belt developed in a band shape, and the ends of the resin belts at both ends are formed. A resin belt joint structure formed in a ring shape by inserting single hooks into each other and inserting a connecting member, and provided with cover layers at both ends peeled from each end by a predetermined length and driven. The racing hook is covered with a thermoplastic resin member on one side, and entirely covered with a canvas member on the other side, and the thermoplastic resin member occupies the space occupied by the connecting member. It is characterized in that it is filled in the part to be removed.
[0007]
According to the joint structure of the resin belt as in the first aspect, when the belt developed in a belt shape is connected in a ring shape on the site, one side of the racing hook is covered with the resin and the other surface is covered. The side is covered with a canvas member, and the periphery thereof is filled with the resin used for the covering. As a result, it can be easily connected in the field, and the entire surface of the racing hook is covered, so that the strength can be increased, and the belt can be driven with pulleys, tables and ropes during belt operation. No noise, noise can be reduced, and durability can be improved.
[0008]
According to the second aspect of the present invention, the connecting member can be easily extracted at the time of manufacturing the above joint structure, and the productivity can be improved.
[0009]
The method for producing a joint structure of a resin belt according to claim 3 of the present invention as means for achieving the above object is a method for producing a joint structure of a resin belt according to the invention of claim 1,
The cover layers at both ends of one surface of the resin belt are peeled from each end by a predetermined length, and a racing hook is driven into the core canvas layer at both ends, and the both ends are butted and connected. A metal fitting joining step for inserting the member;
A thermoplastic resin member of a predetermined size is preliminarily welded to the surface from which the cover layer has been peeled so as to cover and shield the driven racing hook. A molding step for preliminarily welding a canvas member of a predetermined size;
Inserting the molded body obtained in the above step into a press, filling the thermoplastic resin member without any gaps by heating and pressing to form a coating resin layer, and molding into a solid monolithic structure;
The connecting member is separated from the solid integrated structure, and the thermoplastic resin member welded to one surface and the canvas member welded to the other surface are cut in the central width direction, and the solid integrated structure Dividing step for separating the left and right so as to form ends,
It is characterized by comprising.
[0010]
According to the manufacturing method of the resin belt joint structure as in the third aspect, the entire surface of the one side of the racing hook can be covered with the resin, and the entire surface of the other surface side is the canvas member. Can be coated. Furthermore, the resin used for the coating is filled around the racing hook. In this way, since almost the entire surface of the racing hook can be covered, the strength can be increased, and the racing hook does not hit the pulley, table, or roller during belt operation, and noise is reduced. And durability can be improved.
[0011]
The method for manufacturing the joint structure of the resin belt according to claim 4 is easy to manufacture because the release member is applied to the connecting member inserted through the lasing hook, so that the connecting member can be easily separated. , Improve productivity. Furthermore, it is possible to manufacture a belt with good durability and low noise generation.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 to FIG. 4 are diagrams for explaining one embodiment of a resin belt joint structure and its manufacturing method according to the present invention. FIG. 1 is a sectional view showing the resin belt joint structure, and FIG. FIG. 3 is a plan view showing a partial cross section of the joint, FIG. 3 is a view showing the structure of the joint in the manufacturing process, and FIG. 3 (a) is a cross sectional view showing a state where the cover layer is peeled off by a predetermined length. (B) is a cross-sectional view showing a state in which 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. 4D is a cross-sectional view showing a state of covering, and FIG. 4E is a cross-sectional view showing one end portion cut.
[0013]
The resin belt 1 of this embodiment is formed of a core canvas layer 2, 2, an adhesive layer 3 for bonding the core canvas layers 2, 2, and a thermoplastic resin cover layer 4. On the core canvas layer 2 of the cut resin belt 1, the racing hooks 5 are driven into both ends at intervals like a comb and inserted into each other, and the connecting member 6 is inserted into these spaces. It is connected. One surface side 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 surface of the other racing hook 5 opposite to the cover layer 4 is entirely covered with a canvas member 8 welded in the vicinity of the end portion to form a joint.
[0014]
The core body canvas layer 2 of the resin belt 1 is impregnated with a processing solution or coated with a woven fabric such as plain weave, twill weave, satin weave, etc. to a thickness of 0.2 to 1.0 mm, respectively. Is formed. As the material for the canvas, fibers with less elongation such as cotton fiber, polyester fiber, aromatic polyamide fiber, nylon fiber, etc. are preferable. The processing liquid for impregnating the woven fabric is made of the same quality thermoplastic resin having good affinity with the cover layer 4. When the multilayered core body canvas layer 2 is laminated, the adhesive layer 3 is interposed. The adhesive layer 3 for adhering the core canvas layer 2 may be the above-mentioned woven fabric treatment liquid alone, or may use a normal adhesive. In short, any belt that does not cause the belt to peel off may be used.
[0015]
Examples of the cover layer 4 include thermoplastic resins that can be easily manufactured and have various properties, such as polyurethane resins, vinyl chloride resins, polyamide resins, polyimide resins, polyester resins, and polyolefin resins. 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.
[0016]
The racing hook 5 is a metal rod-shaped member having a substantially U-shaped cross section, and the tip portions thereof face each other so that they can be driven into and fixed to the core canvas layer 2 exposed from the belt end portion. It is bent in the direction to do. The material, dimensions, and the like depend on the intended use of the belt used, but examples of the material include steel, stainless steel, and other metals plated on them. A diameter of about 0.4 to 1.2 mm is used. Then, the racing hooks 5 are driven into the both ends of the belt 1 at predetermined intervals of 1.0 to 4.0 mm over the entire length in the width direction, and are comb-shaped. The parts are abutted and a space penetrating in the width direction is formed. The connecting member 6 is inserted into this space and the belt end is connected.
[0017]
The connecting member 6 is inserted into a space formed between the racing hooks 5 inserted alternately at the belt end, and a cross section in which the racing hook 5 rotates around this is a circular or oval bar shape. It is a 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 or a metal salt thereof, waxes, silicone, etc., because the end portions can be easily separated and manufacturing is facilitated. .
[0018]
A filling space 7 around the racing hook 5 that is not occupied by the connecting member 6 is formed by being filled with a thermoplastic resin. When the covering layer 4a is formed on the surface of the core body canvas layer 2 so as to be substantially flush with the covering layer by heating and pressing, the filling space 7 is formed by the molten thermoplastic resin from the periphery of the racing hook 5 to the connecting member 6. It is formed around the periphery. Therefore, the filling space 7 is formed integrally with the coating layer 4a with a thermoplastic resin.
[0019]
On the other surface side of the racing hook 5 opposite to the covering layer 4a, the canvas member 8 is bonded to cover the entire surface (from the belt end to about 10 to 30 mm). The canvas member 8 is not particularly limited as long as it can be used for the belt, and may be the same type as the core body canvas layer 2. Adhesives are not particularly limited, and polyurethane adhesives, vinyl adhesives, plastic adhesives such as polyimide and polyester, rubber adhesives using natural rubber, styrene-butadiene rubber, nitrile rubber and other rubbers. An agent or the like is used.
[0020]
As described above, one surface of the racing hook 5 is coated with the thermoplastic resin in substantially the same plane as the cover layer to form the coating layer 4a, and the surrounding space is filled with the thermoplastic resin and heated. A filling space 7 is formed of a plastic resin, and the other surface is entirely covered with a canvas member 8 welded in the vicinity of the end portion to form a joint portion. Since the connecting member 6 is inserted into the hole between the racing hooks 5 and the end portions are connected to form the belt, the strength can be increased, and the racing hook can be rotated during the belt operation. In addition, it does not hit the table or roller, can reduce noise, and can improve durability.
[0021]
Next, a method for manufacturing the joint structure of the resin belt constructed as described above will be described with reference to FIGS.
First, the cover layer 4 having a predetermined length (30 to 80 mm) is peeled from the resin belt material in which the adhesive layer 3 is interposed between the core canvas layers 2 and 2 and the cover layer 4 is provided on one surface. Then, a stripped portion 4b is provided by stripping the core canvas layer 2. Then, it cut | disconnects in the width direction along the XX line of Fig.3 (a).
[0022]
Next, the racing hooks 5 are driven into both ends at predetermined intervals, inserted into and abutted against each other, and then the connecting member 6 is inserted to connect the belt end portions to form an annular belt (FIG. 3B). ). At this time, a silicone-based material is applied to the connecting member 6 so that it can be easily removed even after the thermoplastic resin is welded.
[0023]
Next, a thermoplastic resin sheet made of the same material as the cover layer 4 is placed on the stripped portion 4b from which the cover has been peeled so as to cover the joint portion, and the material for forming the canvas 8 on the back surface is also applied to the back surface of the joint portion. (FIG. 4C), temporarily fixed to the belt main body by heating with a soldering iron or the like. At this time, the thermoplastic resin sheet is thick so that it is almost flush with the cover layer 4 even if it flows into the space around the racing hook 6 during welding. A canvas member having a size covering the end of the belt is used.
[0024]
Next, a thermoplastic resin member is welded by using a heating press, and the canvas 8 is welded, and at the same time, the filling space 7 is formed by entering the space around the racing hook 5 (FIG. 4D). Then, the front and back coating layers 4a and the canvas member 8 are cut in the width direction along the YY line in FIG. At this time, work is performed so as not to damage the racing hook.
Next, the connecting member 6 is pulled out, and the joint portion is separated and formed into a strip 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.
[0025]
In addition, this invention is not limited to an above-described form, Of course, it can change and implement in the range which does not change the meaning. For example, a resin belt having a cover layer on both sides or a resin belt having a core canvas layer on both sides can be implemented.
[0026]
【Example】
A plain woven fabric made of polyester fibers is used as the core canvas, a polyurethane resin member having a thickness of 2.1 mm is used as the cover layer, and a polyester canvas is welded as a canvas member with a total length of 30 mm. The width is 100 mm and the length is 1700 mm. A conveyor belt having a joint structure according to the present invention was manufactured.
Using this belt, a running test was conducted with a running test apparatus as shown in FIG. The running test device has a pulley diameter of 60 mm, a belt speed of 100 m / min, a tension of 4.9 KN / m, and a running time of 200 hours. The total number of bending of the pulley at this time is 3.5 million. there were.
For comparison, as a conventional example, the same resin belt as in the above example was cut, a racing hook was directly driven, and a running test was performed using a joint structure in which a connecting member was inserted.
As a result, the belt of this example was free from noise and was not damaged when the racing hook hits the pulley. In the comparative product, the bent portion of the racing hook was worn, and was cut off in the middle.
[0027]
【The invention's effect】
According to the joint structure of the resin belt of the present invention, the racing hook does not hit the pulley, table, or roller during belt operation, noise can be reduced, and durability can be improved.
According to invention of Claim 2, a connection member can be isolate | separated easily, the effort of manufacture can be shortened and productivity can be improved.
[0028]
According to the manufacturing method of the third aspect, the entire surface on the cover layer side can be coated with the resin, and the periphery of the racing hook can be filled with the resin used for the coating. In this way, since almost the entire surface of the racing hook can be covered, it is possible to easily manufacture a belt having a joint structure with high strength, low noise and good durability.
[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 in which the joint portion is partially sectioned.
3A and 3B are diagrams showing the structure of a joint part in the manufacturing process, where 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.
4 is a cross-sectional view of the joint structure in the manufacturing process subsequent to FIG. 3, in which FIG. 4 (c) is a cross-sectional view showing a state in which both sides of the racing hook are covered, and FIG. FIG. 4E is a cross-sectional view showing one end portion that has been cut.
FIG. 5 is a schematic configuration diagram of a belt running test apparatus.
[Explanation of symbols]
1: Resin belt 2: Heart canvas layer 3: Adhesive layer 4: Cover layer 4a: Cover layer 5: Racing hook 6: Connecting member 7: Filling space 8: Canvas member

Claims (4)

A core body canvas layer in which at least one core body canvas is laminated, and a thermoplastic resin cover layer is laminated on one side of the core body canvas layer to form a resin belt, which is developed into a belt shape. Each end of the resin belt is formed into a ring shape by driving a racing hook into a comb shape and inserting the connecting hooks at both ends and inserting a connecting member. a joint structure of the resin belt in a belt shape, both end portions of cover - the layers are provided by implanting with a predetermined peeling length from the end portion Le - Thing hook thermoplastic in one surface A resin characterized in that it is covered with a resin member, the other side is covered entirely with a canvas member, and the thermoplastic resin member is filled in a portion excluding the space occupied by the connecting member. bell Junction structure. The joint structure of a resin belt according to claim 1, wherein a release agent is applied to a connecting member that is inserted through the racing hook. A core body canvas layer in which at least one core body canvas is laminated, and a thermoplastic resin cover layer is laminated on one side of the core body canvas layer to form a resin belt, which is developed into a belt shape. Inserting the racing hooks into both ends of the resin belt in a comb shape, and joining them by inserting the connecting hooks at both ends and inserting the connecting member, the resin belt ends can be separated freely by pulling out. A method of manufacturing a resin belt joint structure,
The cover layers at both ends of one surface of the resin belt are peeled from each end by a predetermined length, and a racing hook is driven into the core canvas layer at both ends, and the both ends are butted and connected. A metal fitting joining step for inserting the member;
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 shield the driven racing hook, and the other core body canvas layer has a surface on which the cover layer is peeled off. A molding step for preliminarily welding a canvas member of a predetermined size;
Inserting the molded body obtained in the above step into a press, filling the thermoplastic resin member without any gaps by heating and pressing to form a coating resin layer, and molding into a solid monolithic structure;
The connecting member is separated from the solid integrated structure, and the thermoplastic resin member welded to one surface and the canvas member welded to the other surface are cut in the central width direction, and the solid integrated structure Dividing step for separating the left and right so as to form ends,
The manufacturing method of the junction part structure of the resin belt characterized by comprising. The manufacturing method of the junction part structure of the resin belt of Claim 3 with which the mold release agent was apply | coated to the connection member inserted in the said racing hook.

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