JP2004197782A - Toothed belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toothed belt preventing damage of a core wire. <P>SOLUTION: The circumferentially continuous core wire 6 is embedded in a belt main body 5 formed with belt teeth 8. Intermediate canvases 7a, 7b protecting the core wire 6 are embedded in the belt main body 5. The intermediate canvases 7a, 7b are respectively disposed on an inner circumferential side and an outer circumferential side of the core wire 6. When the belt main body 5 is compressed in a thickness direction, the intermediate canvases 7a, 7b restrict deformation of the belt main body 5, and the deformation of the core wire 6 along with the deformation of the belt main body 5 is suppressed. Therefore, the damage of the core wire 6 is prevented. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothed belt used as a crawler belt mounted on, for example, transport equipment.
[0002]
[Prior art]
In general, transport equipment is provided with a moving means for moving on a floor surface. As this moving means, a crawler belt wound around a toothed pulley may be equipped, and the crawler belt is rotated in the circumferential direction by rotating the toothed pulley with a motor or the like, and the transporting equipment travels on the floor surface. It has become.
[0003]
The crawler belt is a toothed belt including a belt main body having belt teeth formed on an inner peripheral surface thereof and a core wire continuously embedded in the belt main body in the circumferential direction. It is subjected to an acting tensile force.
[0004]
[Problems to be solved by the invention]
However, when the toothed belt is used as a crawler belt, the portion sandwiched between the toothed pulley and the floor surface is strongly compressed in the thickness direction, so that the thickness of the belt body becomes thinner and the belt becomes thinner. The width of the body expands. Due to this deformation of the belt body, the core wire embedded in the belt body may be damaged and the strength of the belt may be reduced, or the portion deviating in the width direction from the toothed pulley may be damaged and the inner core wire may be exposed. Thus, the life of the toothed belt may be shortened.
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a toothed belt that can prevent damage to a cord and extend the life of the belt.
[0006]
[Means for Solving the Problems]
In view of the above problems, the present invention is based on the premise that the belt main body has a structure including a belt main body in which belt teeth are formed on the inner peripheral surface, and a core wire continuously embedded in the belt main body in the circumferential direction. Another object of the present invention is to provide a toothed belt in which an intermediate canvas for protecting a cord is embedded. According to this configuration, the intermediate canvas regulates the deformation of the belt main body and protects the cord, so that damage to the cord can be prevented.
[0007]
That is, when the toothed belt is compressed in the thickness direction on the toothed pulley, the thickness of the belt body is reduced and the width of the belt body is increased, and the deformation of the belt body in the thickness direction and the width direction is performed. Accordingly, the core wire is deformed so as to be bent. The core wire is easily damaged by prolonged deformation of the core wire or by repeated deformation of the core wire, but the intermediate canvas regulates the deformation of the belt body and suppresses the deformation of the core wire. , Can prevent damage to the cord.
[0008]
In addition, since the intermediate canvas regulates the spread of the belt width, the deviation of the toothed belt from the toothed pulley can be prevented without setting the pulley width large. Thereby, exposure of the core wire due to damage to both side edges of the belt main body can be prevented.
[0009]
Here, by embedding the intermediate canvas in the belt main body, the width of the belt main body is restricted in the width direction, and the deformation in the width direction is restricted, so that the deformation in the thickness direction is reduced. Incidentally, a general toothed belt has a structure in which the belt teeth are covered with canvas and reinforced, but the intermediate canvas of the toothed belt of the present invention is different from the canvas which covers the belt teeth. is there.
[0010]
If the intermediate canvas is arranged on the inner peripheral side and the outer peripheral side of the core wire, the core wire is covered from both sides, so that the deformation of the core wire can be further reduced. This toothed belt may be used, for example, as a transport belt for transporting heavy objects to be transported, but if used as a crawler belt, a preferred embodiment of the present invention can be provided.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a toothed belt according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a toothed belt of the present invention used as a crawler belt, and FIG. 2 is a sectional view of a main part of the toothed belt.
[0012]
The toothed belt 1 is wound around, for example, a toothed pulley 3 which is rotated by a driving force of a motor 2, and is used as a crawler belt for running a moving object 4 such as transport equipment on a floor surface. An annular belt body 5, a core wire 6 continuously embedded in the belt body 5 in the circumferential direction, and two intermediate canvases 7a and 7b for protecting the core wire 6 are provided.
[0013]
The belt main body 5 is made of rubber made of, for example, chloroprene rubber and acrylonitrile butadiene rubber, and has belt teeth 8 meshing with the pulley teeth of the toothed pulley 3 on its inner peripheral surface. The surface of the belt teeth 8 is covered with a canvas 9 made of, for example, a nylon cloth dipped in rubber glue or the like, and the canvas 9 reinforces the belt teeth 8.
[0014]
The tooth rubber 10 forming the belt teeth 8 is made of chloroprene rubber used for a standard toothed belt, and the back rubber 11 forming the back of the belt body 5 is made of acrylic nitrile having excellent wear resistance and oil resistance. It consists of butadiene rubber. The back rubber 11 is colored with a blue pigment so that dirt on the floor surface due to the black rubber adhering to the floor surface is not conspicuous.
[0015]
The core wire 6 is a glass core wire or the like obtained by twisting glass fibers, is buried in the belt body 5 so as to be located near the bottom of the belt teeth 8, and receives the tensile force acting on the toothed belt 1. Has become.
[0016]
The intermediate canvases 7 a and 7 b are, for example, nylon fabrics, and are embedded in the belt body 5. Among these, the intermediate canvas 7 a is arranged on the inner peripheral side of the core wire 6 and is located so as to be in contact with the core wire 6 and the canvas 9. On the other hand, the intermediate canvas 7 b is arranged on the outer peripheral side of the core wire 6, and is located between the tooth rubber 10 and the back rubber 11 of the belt body 5 with an interval from the core wire 6.
[0017]
The intermediate canvases 7a and 7b regulate the width of the belt body 5 in the width direction, and at the same time, reduce the deformation of the belt body 5 in the thickness direction. Thereby, the deformation of the belt main body 5 at the portion sandwiched between the toothed pulley 3 and the floor surface is restricted, so that the deformation of the core wire 6 due to the deformation of the belt main body 5 is suppressed, and the strength of the core wire 6 decreases. Is prevented.
[0018]
Further, the intermediate canvases 7a and 7b regulate the width of the belt main body 5 in the width direction, so that the width of the toothed pulley 3 is not set wider than the width of the toothed belt 1, and the teeth from the toothed pulley 3 are not set. Deviation of the attached belt 1 is prevented, and damage to both side edges of the belt body 5 and exposure of the core wire 6 due to the damage are prevented.
[0019]
Next, a procedure for manufacturing the toothed belt will be described. First, the outer peripheral surface of the mold is covered with the canvas 9 sewn to the annular canvas jacket, the outside is covered with the intermediate canvas 7a sewn to the annular canvas jacket, and the core wire 6 is spirally wound around the outside. . Next, an unvulcanized rubber sheet of chloroprene rubber to be formed into the tooth rubber 10 is wrapped around the outside, an intermediate canvas 7b sewn to an annular canvas jacket is covered over the outside, and acrylic is formed on the outside to form the back rubber 11. Wind an unvulcanized rubber sheet of nitrile butadiene rubber. Here, the canvas 9 has a circumferential length capable of entering the tooth space of the mold, and the intermediate canvases 7a and 7b have a circumferential length covering the outer peripheral side of the mold without entering the tooth space.
[0020]
Thereafter, an unvulcanized rubber sheet of chloroprene rubber and acrylonitrile butadiene rubber is formed by covering a rubber-made cylindrical shell bag, for example, over the outer side of the unvulcanized rubber sheet and applying heat and pressure in a vulcanizing pot. Is vulcanized. At this time, a part of the unvulcanized rubber sheet of chloroprene rubber flows through the gap between the cords 6 and the mesh of the intermediate canvas 7a, and flows into the tooth space of the mold so as to push the canvas 9 into the tooth rubber. 10 is formed. The unvulcanized rubber sheet of acrylonitrile butadiene rubber is formed on the back rubber 11 and a part of the unvulcanized rubber sheet passes through the mesh of the intermediate canvas 7a, so that the tooth rubber 10 and the back rubber 11 are integrated.
[0021]
As a result, the belt teeth 8 are covered with the canvas 9 to form a rubber toothed belt in which the core wire 6 and the intermediate canvases 7a and 7b are embedded. This is removed from the shell bag and the mold, and the back surface is polished, printed, and cut to a predetermined width to complete the production of the toothed belt.
[0022]
It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope of the present invention. For example, instead of providing two intermediate canvases 7a and 7b, one intermediate canvas may be arranged on the inner peripheral side or outer peripheral side of the core wire 6, or three or more intermediate canvases may be provided. Further, instead of using the toothed belt 1 as a crawler belt, it may be used as a transport belt.
[0023]
Instead of configuring the tooth rubber 10 and the back rubber 11 of the belt body 5 with different types of rubber, they may be configured with the same type of rubber. The backing rubber 11 only needs to be inconspicuous on the floor surface due to adhesion to the floor surface, and may be colored with a pigment according to the floor surface color in addition to blue. Black rubber may be used as long as it does not adhere to the floor surface.
[0024]
【The invention's effect】
As is apparent from the above description, in the present invention, an intermediate canvas for protecting the core wire is buried in the belt main body, and the deformation of the belt main body on the toothed pulley is regulated by the intermediate canvas. Thereby, the deformation of the core wire can be suppressed to prevent the strength of the core wire from being reduced, and the deviation from the toothed pulley can be prevented to prevent the core wire from being exposed due to the damage of the belt main body. As a result, damage to the cord can be prevented and the life of the toothed belt can be extended.
[Brief description of the drawings]
FIG. 1 is a perspective view of a toothed belt of the present invention used as a crawler belt. FIG. 2 is a sectional view of a main part of the toothed belt.
DESCRIPTION OF SYMBOLS 1 Toothed belt 5 Belt main body 6 Core wires 7a, 7b Intermediate canvas 8 Belt teeth 9 Canvas

Claims (3)

A belt body having belt teeth formed on an inner peripheral surface thereof, and a core wire continuously embedded in the belt body in the circumferential direction, wherein an intermediate canvas for protecting the core wire is embedded in the belt body. A toothed belt characterized by the following. 2. The toothed belt according to claim 1, wherein the intermediate canvas is disposed on an inner peripheral side and an outer peripheral side of the core wire, respectively. 3. 3. The toothed belt according to claim 1, which is used as a crawler belt.

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