JPH05147561A - Caterpillar belt - Google Patents

Abstract

PURPOSE:To travel stably without partially stretching a caterpillar belt while traveling, and prevent wheels from running off the caterpillar belt by burying tension reinforcing materials to be buried on the lower surface side of a core metal while keeping a prescribed interval in the width direction. CONSTITUTION:Tension reinforcing materials 1 arranged/buried in plurality in an elastic material are restricted, so that each one of them can keep a prescribed interval in the width direction by means of wefts 2 while keeping a proper interval in the longitudinal direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is formed of an elastic material such as rubber and has a cored bar embedded in the center portion in the widthwise direction thereof and at predetermined intervals in the longitudinal direction, and meshes with a drive sprocket between the cored bars. The present invention relates to an endless track band in which a meshing hole is formed and a tensile reinforcing material is embedded on the lower surface side of a cored bar so as to surround a row of the cored bar.

[0002]

2. Description of the Related Art A conventional tensile reinforcing material embedded in an elastic material having an endless track is disclosed in, for example, Japanese Patent Laid-Open No. 57-15078. The steel cords are embedded in parallel.

[0003]

Each of the conventional steel cords is disjoint, and the rubber is vulcanized by arranging these steel cords side by side and vulcanizing the rubber at this time. As a result, the steel cords are disturbed, and the steel cords embedded in the rubber after vulcanization may not line up at predetermined intervals in the width direction. As a result, the band body made of an elastic material partially expands, which makes the running unstable and may cause derailment.

Therefore, according to the present invention, the tension reinforcing material is embedded at a predetermined interval in the width direction so that the endless track zone does not partially extend during traveling and stable traveling is possible, and wheel loss prevention is performed. The purpose is to provide an endless orbital zone designed for.

[0005]

In order to achieve the above-mentioned object, according to the present invention, a plurality of tensile reinforcing materials which are lined up and embedded in an elastic material are appropriately spaced in the longitudinal direction, and a weft thread is used in the width direction. One book is constrained so as to maintain a predetermined interval.

[0006]

[Function] Since a plurality of tensile reinforcements are constrained by weft threads,
Disturbance of the arranged tension reinforcements due to the flow of rubber during vulcanization is prevented, and in the embedding state, each one is accurately embedded so as to be substantially parallel to the longitudinal direction, and the width of each one The distance in the direction also maintains a substantially predetermined distance over the entire longitudinal direction. Therefore, the tensile reinforcing material appropriately acts against the force that pulls the endless belt ring in the circumferential direction,
Prevents partial stretch.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a side view of a partial cross section of a tensile reinforcement material 1 to be embedded, and a plurality of the tensile reinforcement materials 1 are arranged side by side and embedded in an elastic material. Being restrained at 2. A steel cord is used as the tensile reinforcing material 1, and the wire diameter is 0.1 to 0.4 mm.
It is common to twist the strands of No. 1 to have a cord diameter of 0.5 to 3 mm to form one tensile reinforcing member 1. It is preferable that the steel cord forming the tensile reinforcing member 1 has a certain crimp property in the length direction thereof, and has a breaking strength of about 1%.
It is preferable to make the waveform have a substantially triangular shape when viewed from the side so that it has an elongation of 0.3 to 0.8% at 0%. The wavelength P and the amplitude W are 0.02P ≦ W
≦ 0.07P, the degree is generally. Reference numeral 3 in FIG. 1 indicates a peak and reference numeral 4 indicates a valley. By imparting such elasticity to the steel cord, it is possible to prevent the steel cord from being cut when foreign matter is caught during use, and it is also possible to wind the steel cord around a small diameter sprocket. Further, since the flexibility is high, the overlapped portion of the steel cord at the time of endlessness is improved, and the crack of the rubber due to the rebound of the steel cord at the end is prevented.

FIGS. 2 and 3 show that the steel cord has Z cords and S cords which are adjacent to each other and are alternately Z-twisted and S-twisted. In this way, twist stability is obtained by alternately twisting the cords in the Z twist and the S twist.

A plurality of weft yarns 2 are attached to a plurality of tension reinforcing members 1 arranged in a longitudinal or longitudinal direction at appropriate intervals in the form of a slump or a ladder. This weft thread 2 is
Nylon, polyester, or monofilament,
It is possible to use yarns and even thin steel cords.

A plurality of tensile reinforcement materials 1 constrained by weft threads 2 as shown in FIGS. 1 to 3 are shown in FIGS. 4 and 5, for example.
It will be buried in the endless orbital zone as shown in. That is, the endless belt 5 which is entirely formed of an elastic material such as rubber has a core metal 7 embedded in the widthwise central portion 6 and at predetermined intervals in the longitudinal direction.
A meshing hole 9 formed between the cored bars 7 for meshing with the drive sprocket 8 (see FIG. 6), and both wing parts 10 extending outward from both sides of the widthwise central part 6. Comprising. The long lugs 11 and the short lugs 12 are provided on the ground contact surface side of the endless belt 5 configured as described above, and the long lugs 11 are provided.
Is formed to have substantially the same width as the width of the endless belt 5 (for example, 300 mm), and the short lug 12 is formed so as to exist substantially in the projection area of the cored bar 7. The width of the core metal 7 in the width direction is, for example, 150 mm.
Is set to. Further, in this embodiment, one short lug 12 is formed between the long lugs 11. Both wings 10
Are formed on the inner peripheral surface of the widthwise central portion 6 so as to be high on the inner surface side. The inclination angle of the inclined portion 11A extending in the longitudinal direction of the endless belts 5 located at both ends of the long lug 11 with respect to the vertical line is formed to be larger than that of the central inclined portion 11B of the long lug 11. A plurality of tensile reinforcing materials 1 are embedded along the longitudinal direction on the lower surface side of the cored bar 7 embedded in the endless belt 5. In the example shown in FIG. 5, a plurality of tensile reinforcing members 1 of two groups are embedded in parallel at both ends of the core metal 7 in the width direction. The weft thread 2 may be used for each of these two groups, or the entire two groups may be constrained by the weft thread 2.

In FIG. 6, the endless belt 5 is bridged between the drive sprocket 8 and the wheel 13, and the inner peripheral surface of the endless belt 5 is pressed against the idler 14. A guide protrusion 7A is formed on the core metal 7 so as to protrude toward the inner peripheral surface of the idler 1.
4 is guided by the guide projection 7A and runs on the inner peripheral surface of the endless belt 5.

The embodiment shown in FIGS. 4 to 6 is an example, and the shape of the lug does not necessarily have to be such a configuration. Further, the core bar 7 is not limited to the one having the guide projection 7A, and even if the shape of the cored bar 7 is an endless band in which various shapes are embedded, the tensile force embedded below the cored bar The present invention can be applied to the reinforcing material.

[0013]

As described above, according to the present invention,
A plurality of tensile reinforcing materials embedded in an elastic material are arranged side by side in the longitudinal direction at appropriate intervals, and one weft thread in the width direction 1
Since the books are constrained so as to maintain a predetermined interval, when a plurality of books are lined up and embedded in the rubber, the flow of the rubber during vulcanization can prevent the disturbance of each of the tensile reinforcing materials. As a result, the multiple tensile reinforcements are buried correctly so as to be substantially parallel to the longitudinal direction of the endless belt, and even if the endless belt is pulled during running, it partially stretches and running becomes unstable, resulting in wheel removal. The risk of doing so also disappears. In addition, the presence of the weft thread improves the torsional rigidity.

[Brief description of drawings]

FIG. 1 is a side view of a partial cross section showing a preferred embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a sectional view taken along the line BB of FIG.

FIG. 4 is a plan view showing an example of an endless belt to which the present invention is applied, viewed from the ground plane.

FIG. 5 is a sectional view taken along line C-C of FIG.

FIG. 6 is a simplified side view showing a state in which the endless track zone is attached.

[Explanation of symbols]

 1 Tensile Reinforcement Material 2 Weft Thread 5 Endless Band 7 Core Bar

Claims (1)

[Claims] 1. A core metal formed of an elastic material such as rubber is embedded in a widthwise central portion of the core metal at predetermined intervals in the longitudinal direction, and meshing holes for meshing with a drive sprocket are formed between the core metals. , In an endless track band in which tensile reinforcements are embedded so as to surround the row of cores on the lower surface side of the cores, a plurality of tension reinforcements embedded in an elastic material are lined up in the elastic material at appropriate intervals in the longitudinal direction, 1 piece each with a weft thread in the direction
An endless orbital band characterized by books being constrained to maintain a predetermined interval.