JPS6349040B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tunnel wall cleaning vehicle that cleans a wall surface while traveling inside a tunnel.

Conventionally, when cleaning the inner wall surface of a tunnel, a wet or dry rotating brush was attached to a self-propelled vehicle.
Usually, the rotary brush cleans the inner wall surface of the tunnel while the vehicle is running.

However, it is difficult to run the vehicle completely against the tunnel inner wall surface, and the distance between the vehicle and the tunnel inner wall surface always changes somewhat, so the distance between the rotary brush axis and the tunnel inner wall surface also constantly changes. As a result, the rotating brush may separate from the tunnel inner wall surface.

In order to prevent the rotating brush from separating from the tunnel inner wall surface, it is necessary to make the bristles of the rotating brush considerably long, but this makes the rotating brush expensive and the bristles bend too much, making it difficult to clean. The efficiency decreases, and the decrease in cleaning efficiency is particularly significant in the case of a dry method.

A countermeasure against this problem is to run the vehicle as parallel to the tunnel wall as possible, but this requires a highly skilled driver and is mentally tiring for the driver, so driving for long periods of time is not recommended. It becomes difficult.

The object of the present invention is to provide a tunnel inner wall surface cleaning vehicle that advantageously solves the above-mentioned problems.

Next, the present invention will be explained in detail using illustrated examples.

1 to 7 show an embodiment of the present invention, in which the base end portions of a plurality of first arms 12 are disposed at the widthwise central portion of the upper part of the body 2 of the self-propelled vehicle 1. The first arms 12 are arranged so as to be close to each other in the front-rear direction, that is, in the vehicle running direction, and each of the first arms 12
The base end of the first arm 12 is pivotally connected to a bracket 13 fixed to the fuselage 2 by a support shaft 14 extending in the front-rear direction, and the intermediate part of the first arm 12 and the fuselage 2 are connected to an elevating drive device consisting of a hydraulic cylinder. They are connected via 3. A base end of a second arm 15 is pivotally attached to the distal end of the first arm 12 by a support shaft 16 extending in the front-rear direction, and the middle part of the first arm 12 and the middle part of the second arm 15 are different from each other. connected via a bending/stretching drive device 4 consisting of a hydraulic cylinder;
The first arm 12, the second arm 15, and the bending/extending drive device 4 constitute a bending/extending arm 5.

A central portion of a brush support member 7 which also serves as a suction hood and which opens toward the wall surface 17 in the tunnel is pivoted to the tip of the second arm 15 by a support shaft 18 extending in the front-rear direction. and the end of the brush support member 7 are connected via an inclination adjustment drive device 6 consisting of a hydraulic cylinder, and a rubber seal plate 19 is provided at the rear end of the opening in the brush support member 7. One side of the seal plate 19 is fixed, and the other side of the seal plate 19 is brought into contact with the wall surface 17.
Further, a rotating brush 9 having a brush shaft 8 located on a plane perpendicular to the vehicle running direction, that is, the front-rear direction, is disposed within the brush support member 7.
Both ends of the brush shaft 8 are rotatably supported by the brush support member 7 via bearings, and the brush shaft 8 is driven by a brush drive device 20 consisting of an electric motor with a reduction gear fixed to the brush support member 7 via a gear transmission mechanism. It is configured to be rotated.

The other end of the suction hose 21, one end of which is connected to the brush support member 7, is connected to a dust-containing gas suction port in a dust collector 22 mounted on the aircraft body 2.
A clean gas outlet of the dust collector 22 is connected to a suction port of an axial blower 23.

Distance detectors 10 and 11 each consisting of an electrical resistance potentiometer for detecting the distance between the wall surface 17 in the tunnel and both ends of the brush shaft 8 are installed at both ends of the brush support member 7 in the longitudinal direction of the brush shaft.
are fixed, the tips of the detection arms 24 and 25 in the distance detectors 10 and 11 are pressed against the wall surface 17 in the tunnel by springs (not shown), and one end and the other end of the brush shaft 8 are When the distance between the end of the brush shaft 8 and the tunnel wall is a predetermined value, that is, when the detection arms 24 and 25 are at a predetermined rotational position, the voltage signal of the distance detector is zero, and the distance between the end of the brush shaft 8 and the tunnel wall is zero. When the distance to the wall becomes larger or smaller than a predetermined value, the detection arm rotates from a predetermined position to one side or the other, and a positive or negative voltage signal proportional to the rotation angle is emitted from the distance detector. The information is sent to an electric control device, which controls the distance between the end of the brush shaft 8 and the tunnel wall to a predetermined value.

In addition, in FIG. 7, the X-X line is the rotating brush 9.
is the tunnel wall surface when is in the normal position,
In addition, the Y-Y line is the tunnel wall surface when both ends of the rotating brush 9 are deviated toward the center of the tunnel by different amounts, and the distance detectors 10 and 1 in this case are
The deflection distance measurements by 1 are A and B.

FIG. 6 shows an example of a hydraulic pressure control circuit that works to maintain the distance between both ends of the brush shaft and the tunnel wall at a predetermined value, and shows an example of a hydraulic control circuit that works to maintain the distance between both ends of the brush shaft and the tunnel wall surface at a predetermined value.
Deflection distance measurements A and B according to No. 11 (see Figure 7)
The voltage signal is sent to a comparator circuit 27 in the electric control device 26, where it is compared with a set value of a distance setting circuit 28, and the control signal from the comparator circuit 27 is amplified by an amplification circuit 29. The electromagnetic switching valves V ₁ to V ₃ attached to the drive devices 3, 4, 6 consisting of appropriate hydraulic cylinders are switched by the control signal given, and the appropriate drive devices 3, 4, 6 are extended or shortened. The distance and inclination of the rotating brush with respect to the wall surface 17 are corrected. When the correction is completed, the electromagnetic switching valve is switched to the neutral position and the expansion/contraction operation of the drive device is stopped.

In addition, in FIG. 6, 31 is a hydraulic pump, 32
is a safety valve.

The electric control device 26 needs to be provided with an electric circuit for preventing hunting, but since this circuit is well known, its explanation will be omitted. Furthermore, by moving the vehicle after appropriately raising and lowering or bending and extending the bending and extending arm 5, it is possible to clean not only the side wall surfaces in the tunnel but also the upper wall surface.

FIGS. 8 to 10 show other examples of the distance detection section, in which a detection plate 30 made of a thin flexible metal plate is arranged over the inclined portion on the tip side of each detection arm 24, 25. and the detection plate 3
0 is fixed to one detection arm 24,
And the other end of the detection plate 30 is connected to the other detection arm 25.
It is slidably inserted into the slit provided in the.

In the case of the distance detecting section shown in FIGS. 8 to 10, when a relatively large obstacle is on the wall between each of the detection arms 24 and 25, the obstacle passes through the detection plate 30 to the detection arm 24. , 25 are rotated, it is possible to prevent the brush shaft 8 from colliding with an obstacle.

When carrying out this invention, each of the drive devices 3,
For 4 and 6, an electric cylinder having an electric motor and a screw type jack may be used instead of the hydraulic cylinder, or a U-shaped frame may be used as the brush support member, and the suction hood may be fixed to this. good. Furthermore, instead of electrical resistance potentiometers, any other type of electrical distance detector may be used as the distance detectors 10, 11.

In the case of the above embodiment, the central part of the brush support member 7 is rotatably attached to the tip of the bending/extending arm 5, but the part of the brush supporting member 7 deviated from the central part toward the end side is bent/stretched. It may be rotatably attached to the tip of the arm 5.

According to this invention, a tilt adjustment drive is provided at the tip of the bending arm 5 which is raised and bent by the elevation drive device 3 and the bending drive device 4 in a plane substantially perpendicular to the traveling direction of the self-propelled vehicle 1. The intermediate part of a brush support member 7 that is rotated within the plane is attached by a device 6, and a rotating brush 9 having a brush shaft 8 located on the plane is attached to the brush support member 7. Distance detectors 10 and 11 for detecting the distance to the tunnel inner wall surface are attached to both ends of the support member 7, and the distance detectors 10 and 11 and each of the drive devices are connected to the brush shaft relative to the tunnel inner wall surface. The self-propelled vehicle 1 maintains a predetermined distance from the wall 17 in the tunnel because the self-propelled vehicle 1 is connected via an automatic control device that controls each of the drive devices so that the distances between both ends of the tunnel 8 are approximately equal. Even when the driver does not travel completely parallel, the distance between both ends of the brush shaft 8 and the tunnel wall 17 can be automatically maintained at approximately a predetermined set value. ,
In addition, the mental fatigue of the driver is low, and even when the self-propelled vehicle 1 is running at a relatively high speed, the distance between both ends of the brush shaft 8 with respect to the wall surface 17 in the tunnel is automatically adjusted, so that the self-propelled vehicle 1, the cleaning work efficiency can be improved by increasing the running speed of the present invention, and furthermore, the tunnel inner wall surface cleaning vehicle of the present invention has a simple structure and can be folded to reduce its bulk when not cleaning. is obtained.

[Brief explanation of drawings]

1 to 7 show one embodiment of the present invention, in which FIG. 1 is a schematic plan view of a tunnel inner wall surface cleaning vehicle, FIG. 2 is a schematic front view thereof, and FIG. 3 is a set of one set. FIG. 4 is a front view showing an enlarged part of the cleaning unit, FIG. 5 is a cross-sectional plan view showing the vicinity of the rotating brush and distance detector, and FIG.
The figure shows an automatic control device between the distance detector and the drive device, and FIG. 7 is a front view showing a state in which the brush shaft is deviated from its normal position. 8 to 10 show other examples of the distance detecting section, in which FIG. 8 is a perspective view, FIG. 9 is a sectional view taken along the line ``--'', and FIG. 10 shows the rotating brush and the vicinity of the detecting section. FIG. In the figure, 1 is a self-propelled vehicle, 2 is a fuselage, 3 is a drive device for elevation, 4 is a drive device for bending and extending, 5 is a bending and extending arm, 6 is a drive device for tilt adjustment, 7 is a brush support member, and 8 is a brush. shaft, 9 is a rotating brush, 10 and 11 are distance detectors, 12 is a first arm, 15
2 is a second arm, 19 is a rubber seal, 20 is a brush drive device, 21 is a suction hose, 22 is a dust collector, 24 and 25 are detection arms, 27 is a comparison circuit, 28 is a distance setting circuit, and 29 is an increaser. Width circuit, 30
is the detection plate.

Claims (1)

[Claims] 1 An elevation drive device 3 is attached to the body 2 of the self-propelled vehicle 1.
A base end of a bending arm 5 is attached to the bending arm 5, which is raised and bent in a plane substantially perpendicular to the vehicle running direction by a bending and extending drive device 4. A middle portion of a brush support member 7 that rotates within the plane is attached, and a rotating brush 9 having a brush shaft 8 positioned on the plane is attached to the brush support member 7. Distance detectors 10 and 11 are attached to both ends of the tunnel to detect the distance to the inner wall surface of the tunnel.
0, 11 and each of the drive devices are connected via an automatic control device that controls each of the drive devices so that the distances of both ends of the brush shaft 8 from the tunnel inner wall surface are approximately equal. A tunnel cleaning vehicle.