JPH11310170A - Connecting structure for rubber crawler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new rubber crawler structure in which a belt-like ended member is made endless. SOLUTION: This connecting structure comprises an ended, long rubber elastic body 11 and a steel cord 12 buried in the rubber elastic body 11 and exposed at each end. The steel cord 12 exposed at each end is disassembled, and corresponding disassembled steel cord parts 15, 16 are twisted together for coupling. This connecting part is filled with unvulcanized rubber, and the unvulcanized rubber is vulcanized under heat and pressure to make a rubber crawler endless.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a new rubber cloth.
More particularly, the present invention relates to a steel cord connection when a belt-like end member is made into an endless rubber crawler.

[0002]

2. Description of the Related Art A general method for producing a conventional rubber roller is to form a long rubber elastic body having ends and connect the left and right ends to form an endless rubber roller. In this case, the steel cords protruding from both ends are overlapped without restraining them, and an unvulcanized rubber is filled in this portion and vulcanized to form an endless shape.

[0003] Therefore, as shown in Fig. 1, the obtained rubber crawler is one in which both ends a and b of a steel cord are simply superimposed on a connecting portion A, and the rubber at this portion is generally used. the thickness t ₀ of the g and forms larger than the thickness t of the other sites, Gomukuro - stiffness of the part a as a whole La becomes extremely larger than the other part, which caused the vibration and noise ing. Further, since the distance between the surface of the base of the rubber roller of the connecting portion A and the ends of the steel cords a and b is relatively small, the ends of the steel cords a and b are repeatedly bent so that the ends of the steel cords a and b can be formed. The rubber may protrude from the inside, and may also cause shearing of the rubber.

[0004]

SUMMARY OF THE INVENTION The present invention proposes a connection structure which does not increase the rigidity of such an endless portion and does not cause shear separation.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and a first gist of the present invention is to provide a rubber elastic body having a long end and an elongated rubber elastic body. Steel cords with both ends exposed, and the exposed steel cords at both ends are unwound, and the corresponding steel code unwound parts are connected together. Then, the unvulcanized rubber is filled in the connecting portion, and the unvulcanized rubber is heated and
The present invention relates to a rubber crawler connection structure characterized in that it is vulcanized under pressure to be endless.

A second gist of the present invention consists of a rubber elastic body having a long end and a steel cord buried in the rubber elastic body and exposing both ends of the rubber elastic body. The exposed steel cords are arranged side by side in the width direction to form a connecting portion, and the connecting portion is filled with unvulcanized rubber, and the unvulcanized rubber is vulcanized under heat and pressure to be endless. The present invention relates to a connection structure of a rubber crawler.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, the steel cord of the endless portion has a structure in which both ends are unwrapped and twisted, so that the steel cord has a structure which is smaller than that of the conventional manufacturing method. , To reduce the difference in rigidity with other parts,
This reduces vibration during traveling and does not cause shearing of rubber.

That is, a steel cord used as a tension reinforcing member of a rubber crawler has a structure in which a plurality of strands are twisted, and the steel cord exposed from both ends of a rubber elastic body to be endless. -The ends of the record are unwound into strands, which are joined together and twisted together.

In the second aspect of the present invention, the steel cord has a connecting structure in which both ends are arranged side by side in the width direction, which also reduces the difference in rigidity with other parts as compared with the conventional one. In this case, the generation of vibration during running is reduced, and the rubber does not undergo shear separation.

In the conventional connecting method, as shown in FIG. 1, both ends of the steel cord are simply overlapped and buried in rubber, and the rigidity of this portion is greater than that of the other portions. However, in the present invention, the steel cord of the wire breaking / connecting portion is not thickened in other portions.
It is not much thicker than the record, so that the thickness of the rubber elastic body is sufficient to be the same as the thickness of other parts.

Therefore, the rigidity of the connecting portion is greatly different from that of the conventional rubber crawler, and the rigidity of the rubber crawler as a whole is not so different.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The rubber crawler of the present invention will be described in more detail with reference to the drawings. FIGS. 2 to 4 are process diagrams showing a connection structure of the first rubber crawler according to the present invention, and FIG. 2 shows a rubber elastic body having ends. The rubber pad 11 is buried along the longitudinal direction, and both ends 13 and 14 are exposed from the left and right ends of the rubber elastic body 11. In the figure, 21 is a rubber lug located on the outer peripheral side of the rubber crawler, and 22 is a corner on the inner peripheral side.

FIG. 3 shows left and right exposed portions 13 of the steel code.
The wire 14 is unwound to form wires 15 and 16, and then the wires 15 and 16 that have been broken are butted and twisted with each other to be connected 17 as shown in FIG. 4.

The twisted portion 17 is filled with an unvulcanized rubber 18, and in this example, a core 19 is buried to form a connecting portion A.
And vulcanize the unvulcanized rubber 18 under pressure and heat to obtain an endless rubber crawler.

FIG. 5 is a plan view of the connecting portion A according to the second embodiment of the present invention, in which left and right exposed portions 13 and 14 of the steel cord are alternately arranged side by side in the width direction of the rubber crawler. The uncured rubber 18 is filled into the connecting portion A, and the uncured rubber 18 is vulcanized under pressure and heat to obtain an endless rubber crawler. It did not happen.

[0016]

As described above, the connection structure of the rubber crawler according to the present invention does not require a particularly large rubber thickness at this portion, and can reduce the rigidity of the rubber crawler as a whole. Of course, the steel cord does not protrude at the connecting portion, and no shearing-off occurs.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a connecting portion of a conventional rubber crawler.

FIG. 2 is a sectional view showing an endless rubber elastic body before being made endless in the first invention.

FIG. 3 is a view showing a state in which an exposed portion of the steel code is broken.

FIG. 4 is a sectional view showing a connecting portion of the first rubber crawler of the present invention.

FIG. 5 is a plan view of a connecting portion according to a second embodiment of the present invention.

[Explanation of symbols]

 A: Steel code connecting part, 11: rubber elastic body, 12: steel code, 13, 14: both ends of exposed steel code, 15, 16: both ends of steel code 17 ° uncoupled rubber, 19 ° cored bar, 21 ° rubber lug, 22 ° corner.

Claims (2)

[Claims] An end-elongated rubber elastic body and a steel cord embedded in the rubber elastic body and exposing both ends of the rubber elastic body. After unwinding, each corresponding steel cord unwinding portion is twisted and connected, and this connection portion is filled with unvulcanized rubber, and the unvulcanized rubber is vulcanized under heat and pressure. A rubber crawler connection structure characterized by being endless. 2. A steel cord having an end and a long rubber elastic body and a steel cord embedded in the rubber elastic body and exposing both ends of the rubber elastic body. A rubber crawler, which is arranged side by side in the width direction to form a connection portion, and the connection portion is filled with unvulcanized rubber, and the unvulcanized rubber is vulcanized under heat and pressure to be endless. Connection structure.