JPS628877A - Absorbing belt for self-propelled work truck - Google Patents

Abstract

PURPOSE:To prevent a slip between driving rollers and an endless belt while rotating, by furnishing teeth of a gear shape along the whole length at both right and left ends of the inner surface of the endless belt contacting with rollers. CONSTITUTION:At the both right and left ends of the inner surface of an endless belt 1, teeth 11 of a gear shape are fixed longitudinally along the whole length. The gear shape teeth 11 are geared with the gear teeth arranged at the periphery of driving rollers 12, 12' which are held at the front and rear ends of the car frame 13, and at the same time, with the teeth of guide rollers 14, 14' which are placed at the adequate positions on both sides of a holding beam 4, while the belt 1 is extended in a straight line. Therefore, a pressing power to the wall by a vacuum power acts against the wall through the endless belt 1.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a suction belt for a wall suction type self-propelled work vehicle.

[Conventional technology]

Conventionally, it has been used remotely for periodic cleaning, rust removal, decontamination, inspection, etc. of large-scale walls made of metal plates or concrete IJs in high-rise buildings, large tanks, ships, nuclear power plants, hydroelectric dams, etc. A self-propelled work vehicle that can be operated for high-altitude work and dangerous work has been proposed. The present applicant, etc. also filed a patent application
In No. J and Japanese Patent Application No. 6O-23OA7, a recess is provided on the outer surface of an endless crawler track that moves cyclically in contact with a wall surface, and by creating a vacuum in the recess, a self-propelled vehicle that runs while adhering to the wall surface. We are proposing a work vehicle. The structural lines of the endless belt in this proposal are shown, for example, in FIGS. 6 and 7. Figure 7 is a cross-sectional view, and Figure 7 is a bottom view. In the figure, l is an endless crawler track made of synthetic rubber or the like, and a plurality of recesses are recessed at regular intervals on the outer surface that comes into contact with the wall surface. A communication hole 3 is bored in the center of the recess 2, and the air in the recess λ is exhausted through the communication hole 3 by a vacuum generating means mounted on the self-propelled work vehicle, and the vacuum is maintained, and the air is attached to the wall surface as a suction cup. act. On the other hand, endless crawler track l
A support beam is attached to the lower part of the machine frame (not shown) along the moving direction of the endless crawler track l, and a communication chamber is provided on the surface of the support beam that comes into contact with the endless crawler track l. are connected to the vacuum generating means via a plurality of communication holes A and a hose 7, which are recessed and press-pierced in the center. There is a communication chamber on the above contact surface of the support beam Hiro! A sealing material t made of ladder-like sponge rubber or the like and having a square cross section is fitted around the endless crawler. A small communication room! maintains a vacuum. As a result of subsequent studies, it was found that the suction belt for the above-mentioned wall suction type self-propelled work vehicle had some problems that needed to be solved.

[Problem that the invention seeks to solve]

In the conventional adsorption belt, the contact surface that adsorbs to the wall surface of the endless crawler belt is a smooth wide surface, and if the wall surface is made of, for example, a steel plate or a smooth concrete surface, this will still prevent the inside of the recess 2. Although it is possible to maintain a vacuum, the wall surface becomes a rough uneven surface when spraying sand, mortar, etc., and it is difficult to maintain a vacuum inside the recessco when it comes into contact with a wide surface like the conventional one. It turned out to be. Another problem is that the conventional suction belt drive system pivots the crawler track and recirculating rollers at the front and rear ends of the machine frame of the self-propelled vehicle, and stretches the track between the rollers with a slight tension. The rollers were rotated by an electric motor or the like and driven by the friction between the rollers and the tracks, but the problem was that slippage occurred between the tracks and the rollers due to elongation of the tracks, making accurate speed control difficult. there were.

[Means for solving problems]

The present invention has been made in view of the above facts, and provides a high performance suction belt for a wall suction type self-propelled working vehicle that can safely and reliably suction travel along rough walls. This is a vacuum suction type self-propelled system that has a recess on the outer surface of the endless crawler track that runs around a rotor that is pivotally supported at the front and rear ends of the machine frame. In the work vehicle, a narrow ladder-like sealing material surrounding the beam is attached to the outer surface that contacts the wall of the endless crawler, and the inner surface that slides in contact with the rotor has gear-shaped unevenness on both left and right ends of the entire length. This is a suction belt for a vacuum suction type self-propelled work vehicle, characterized in that the concavity and convexity are attached to the rotor and rotate by meshing with a gear carved on the outer periphery of the rotor.

The present invention will be explained in detail below based on the drawings.

Fig. 1 is an embodiment of the suction belt of the present invention applied to a self-propelled work vehicle, Fig. 1 is a cross-sectional view of one side of the belt as seen from Y-Y in Fig. 1, and Fig. 3 is a cross-sectional view of the suction belt of the present invention. FIG. 1 is an outside plan view, FIG. 1 is an inside plan view of the suction belt, and FIG. 3 is an enlarged view of the second part of FIG. 2.

In the figure, the symbol /-r is the same as the structure of the conventional suction belt. That is, l is an endless crawler belt, ko is a recess formed in the suction surface of the belt, 3 is a communication hole bored in the center of the recess, μ is a support beam attached to the bottom of the machine frame/3, and y is a A communication chamber recessed in the lower surface of the support beam, t is a communication hole bored in the center of the communication chamber, and 7 is a communication chamber connecting the communication hole t and the vacuum generation means mounted on the self-propelled work vehicle. ! The hose t for exhausting the air inside is a sealing material that is fitted to the bottom of the support beam so as to surround the communication chamber, and prevents leakage between the crawler track l and the support beam.

The sealing material is a ladder-shaped sealing material made of sponge rubber or the like and having a square cross section, which is fitted into a groove io carved in the surface that contacts the wall surface of the endless crawler belt 1, and surrounds the recessco. Another method for attaching the sealing material is to simply attach it to the crawler track 1 without providing the groove 10, and depending on the nature of the wall surface, a plurality of sealing materials may be required.

On the other hand, on both left and right ends of the surface of the endless crawler belt l that comes into sliding contact with the support beam, gear-shaped irregularities are machined along the entire length of the belt in the longitudinal direction. The gear-like unevenness of this endless crawler track l is formed by driving rollers that are pivotally supported on both sides of the front and rear ends of the machine frame 13 of the self-propelled vehicle.
It meshes with a gear carved on the outer periphery of the 2./2”.
In addition, the endless crawler track l
is stretched in a straight line, and the pressing force of the wall surface due to the vacuum force is applied to the wall surface through the endless crawler belt by rollers /It, /≠'.

[For production]

The suction belt of the present invention having the above-mentioned structure exhibits the following effects. The roller lλ is driven by a remote-controlled electric motor.
, /j' is rotated, the endless crawler track l meshing with the gears on the outer periphery of the rollers /,2,l also moves cyclically, and the self-propelled working vehicle moves forward and backward at will. When a vacuum generating means such as an air ejector mounted on the self-propelled working vehicle is activated, the air inside the recessco is evacuated through the hose 7 connected thereto, the communication chamber j, and the communication hole 3 to create a vacuum.

Due to the above-described circular movement of the endless crawler belt 1 and the generation of a vacuum within the recess 2, the suction belt acts on the wall surface as a suction cup. Even if the wall surface is rough, like the surface sprayed on a building, the thin sealing material 9, which is like sponge rubber, deforms and adheres to the unevenness of the surface, preventing leakage between the crawler track and the wall surface and recessing. maintain a vacuum inside.

〔Effect of the invention〕

According to the present invention having the above configuration and operation, the following effects can be obtained.

・Since there is no slippage due to rotation between the drive roller and the endless crawler track, the self-propelled work vehicle can move forward reliably according to remote control.
Can move backwards and turn around.

Even if the φ wall surface is rough with unevenness, the thin sealing material attached to the outer surface of the endless crawler track to surround the recess deforms and adheres tightly to prevent leakage, so the vacuum inside the recess can be maintained. The adsorption power of the belt can be increased.

[Brief explanation of drawings]

Fig. 7 is an embodiment of the suction belt of the present invention applied to a self-propelled work vehicle, Fig. 2 is a cross-sectional view of one side of the belt as viewed from Y-Y in Fig. 1, and Fig. 3 is a suction belt. Fig. 5 is an enlarged view of the second part of Fig. 2, Fig. 6 is a cross-sectional view of the conventional adsorption belt, and Fig. 7 is its bottom view. It is. l: Endless crawler track, 2: Recess, 3: Communication hole, Hiroshi: Support beam, J: Communication chamber, t: Communication hole, 7: Hose, t: Seal material, RI: Seal material, 10: Groove, //:
Gear-shaped unevenness, 12, lλ': Drive roller, 13: Machine frame,
Hiro; Guide roller. Applicant Mitsubishi Kakoki Co., Ltd. No. 1rlA Figure 3 Figure 4

Claims (1)

[Claims] A vacuum suction type self-propelled work vehicle that has a recess formed on the outer surface of an endless crawler track that runs around a rotor that is pivotally supported at the front and rear ends of a machine frame, and that vacuum suction type self-propelled work vehicle that travels by suction on a wall surface by creating a vacuum in the recess. In this case, a narrow ladder-shaped sealing material surrounding the recess is attached to the outer surface that contacts the wall surface of the endless crawler, and gear-shaped unevenness is applied to the left and right ends of the inner surface that comes into sliding contact with the rotor over the entire length. A suction belt for a vacuum suction type self-propelled work vehicle, characterized in that the attached unevenness meshes with a gear carved on the outer periphery of a rotor to rotate.