JPH07223565A - Rubber crawler belt for working vehicle for railroad construction - Google Patents

Abstract

PURPOSE:To improve the insulation resistance of a rubber crawler belt for a working vehicle for railway construction, at a law cost, without deteriorating strength. CONSTITUTION:A core metal 1 and wires 4 which are arranged in parallel are integrally embedded in the peripheral direction in a flexible strip-shaped insulating layer on the grounded surface side of the wire 4 of a rubber belt which is shaped to an endless belt form by a rubber crawler 5. The insulating layer is made of the insulating rubber material or synthetic resin material. Accordingly, the insulation resistance is increased, and strength is not deteriorated, and cost reduction is achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a rubber crawler track of a crawler type work vehicle for railway track maintenance work.

[0002]

2. Description of the Related Art As shown in FIG. 5, a crawler-type work vehicle used for railway track maintenance work is carried out by placing left and right crawler tracks 10 and 11 on left and right rails 12 and 13, respectively. A signal voltage V is applied between the left and right rails 12 and 13,
When the work vehicle rides on the rails 12 and 13, it is short-circuited and it is required that the signal be sensitive and unchanged. That is, when the work vehicle rides on the rails 12 and 13, the insulation resistance value between the rails 12 and 13 is, for example, 1M in a dry state.
It is specified as Ω or more.

As shown in FIG. 6, a rubber crawler belt of a work vehicle is composed of a core metal 1 having a lower rolling surface 2 and left and right blades 3 and an endless wire 4 which is a tensile body. It is composed of an endless belt-shaped rubber crawler 20 to be molded. Generally, rubber crawlers are blended with carbon black as a reinforcing material (30
%). However, when the blending amount of carbon black is large, the above-mentioned specified value of the insulation resistance is often not satisfied. Therefore, as shown in FIG. 7, in the rubber crawler track of a railroad vehicle, the rubber crawler of a normal rubber material portion is
Insulating rubber 22 with little carbon black on the grounding part of
Is used.

[0004]

However, in the above construction, since the insulating rubber 22 having a small amount of carbon black, which is a reinforcing material, is used in the ground contact portion, the strength is insufficient, the material is easily damaged, and the wear life is short. In this case, the insulation capacity is 10 ² to 10 ³ times the specified value, and the insulation force is excessive.

Further, as a measure for the lack of strength, silica or the like may be blended as a reinforcing material in place of carbon black, but in this case, there is a problem that the cost is high.

The present invention has been made in view of the above problems, and provides a rubber crawler for a work vehicle for railway construction which has an appropriate insulating force, has no problem in strength, and is low in cost. It is an object.

[0007]

In order to achieve the above object, a rubber crawler track for a work vehicle for railway construction according to the present invention comprises a protrusion forming a lower rolling surface of a central portion and left and right wings. In a rubber crawler track of a tracked vehicle, in which a core bar is arranged in parallel, a tensile member is circumferentially disposed on the grounding surface side of the core bar, and integrally molded by an endless belt-shaped rubber crawler, the tensile member is It is characterized in that a flexible band-shaped insulating layer is embedded in the circumferential direction on the side of the ground plane.

In the rubber track of the work vehicle for railway work, the insulation resistance of the insulating layer is higher than the insulation resistance of the rubber crawler.

Further, the rubber crawler track of the work vehicle for railway construction is characterized in that the insulating layer is made of a non-metallic material.

Further, in the rubber crawler track of the work vehicle for railway construction, the insulating layer is made of a rubber material.

Further, the rubber crawler track of the work vehicle for railway construction is characterized in that the insulating layer is made of a synthetic resin material.

[0012]

According to the above construction, an insulating layer having a higher insulation resistance than that of the rubber crawler is provided on the grounding surface side of the tensile member embedded in the rubber crawler of the rubber crawler, and the insulating layer is made of a non-metallic rubber. Material or synthetic resin material. Therefore, the insulation resistance value between the left and right crawler belts is maintained at a predetermined value.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rubber crawler track for a work vehicle for railway construction according to the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a first embodiment of a rubber crawler belt, and FIG. 2 is a sectional view taken along line AA of FIG. Reference numeral 1 is a cored bar composed of a lower rolling surface 2 and left and right blades 3, 4 is a wire which is a tensile body, 5 is a rubber crawler, and 6 is a strip-shaped insulating layer, which is divided into left and right. There is. This insulating layer is a flexible non-metallic material, such as an insulating rubber material or a synthetic resin material. The insulation resistance is higher than that of the rubber crawler 5. Therefore, as shown in FIG. 5, even when the left and right crawler belts 10 and 11 ride on the left and right rails 12 and 13, the insulation resistance can satisfy the specified value and the insulation resistance value is excessive. Never be.

FIG. 3 is a cross-sectional view of the second embodiment of the rubber track, in which the insulating layer 7 extends over the entire width of the track. The constituent members, materials and the like are the same as those in the first embodiment, and the description thereof will be omitted.

FIG. 4 shows a third embodiment of the rubber crawler belt, in which the wire 4 is covered with the insulating layer 8. The effects are the same as those in the first embodiment.

[0017]

As described above, according to the present invention, the rubber crawler belt of the work vehicle for railway construction is integrally formed with the core metal and the wire by the rubber crawler, and the endless insulating layer is formed on the grounding surface side of the wire. Buried. Since the insulating layer is made of a flexible non-metal material such as an insulating rubber material or a synthetic resin material, the insulation resistance between the left and right crawler belts has an appropriate value, there is no problem in strength, and the cost is low. Rubber tracks for railroad work vehicles can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a first embodiment of a rubber crawler belt of the present invention.

FIG. 2 is a vertical cross-sectional view of the first embodiment of the rubber crawler belt of the present invention.

FIG. 3 is a cross-sectional view of a second embodiment of the rubber crawler belt of the present invention.

FIG. 4 is a cross-sectional view of a third embodiment of the rubber crawler belt of the present invention.

FIG. 5 is a front view of the work vehicle for railway work during work.

FIG. 6 is a cross-sectional view of a conventional normal rubber crawler track.

FIG. 7 is a sectional view of a rubber crawler track of a conventional work vehicle for railway construction.

[Explanation of symbols]

1 ... Core bar, 4 ... Wire, 5 ... Rubber crawler, 6,
7, 8 ... Insulating layer.

Claims (5)

[Claims] 1. A projection portion forming a lower rolling surface of a central portion,
A rubber crawler for a tracked vehicle in which a cored bar composed of right and left wings is provided in parallel, a tensile member is circumferentially disposed on the grounding surface side of the cored bar, and integrally molded by an endless band-shaped rubber crawler. ,
A rubber crawler track for a work vehicle for railway construction, wherein a flexible band-shaped insulating layer is embedded in the circumferential direction on the grounding surface side of the tensile member. 2. The rubber track of a work vehicle for railway construction according to claim 1, wherein the insulation resistance of the insulating layer is higher than the insulation resistance of the rubber crawler. 3. The rubber track of a work vehicle for railway construction according to claim 2, wherein the insulating layer is made of a non-metallic material. 4. The rubber track according to claim 3, wherein the insulating layer is a rubber material. 5. The rubber track according to claim 3, wherein the insulating layer is a synthetic resin material.