JP2880103B2 - High-pressure water injection device for roads - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure water injection device for roads, which is suitable for road filing and roughing.

[0002]

2. Description of the Related Art Conventionally, when repairing a damaged road surface, a scissoring operation or a roughening operation of blowing the road surface with high-pressure water has been performed.

[0003] An outline of an injection device for injecting high-pressure water has a rotary nozzle for injecting high-pressure water while rotating, and a lateral moving device for laterally moving the rotary nozzle in accordance with the working width. By performing the lateral movement while spraying the water, it is possible to perform a scuffing operation and a roughening operation on the road surface.

[0004]

In the razor or roughening operation, when high-pressure water is sprayed while moving laterally, constant high-pressure water acts on the road surface when the horizontal movement of the rotary nozzle is constant. However, when the lateral movement stops due to an accident or the like, the high-pressure water continues to concentrate on only part of the road surface.

As a result, a deep depression is formed only in a part by the high-pressure water. Therefore, when the lateral movement is stopped, an emergency stop means for stopping the operation of the pump for feeding the high-pressure water to the rotary nozzle is employed.

[0006] However, even if the emergency stop means works,
The pressure is not instantaneously reduced, but the injection pressure from the rotary nozzle weakens only when the high-pressure pump settles at idle rotation and the water in the water tank circulates. In addition, there are long high-pressure hoses having a length of nearly 60 meters, and at present, a time lag occurs from the time of an emergency stop until the injection of the rotary nozzle is reduced in pressure, and the occurrence of deepening is inevitable.

[0007] In particular, the surface of the road surface is, for example, 1-2 mm
This is a big problem in the roughing work in which the flying is performed more uniformly.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a high-pressure water injection device for a road, which is capable of shutting off the injection of high-pressure water from a rotary nozzle simultaneously with an emergency stop of lateral movement.

[0009]

In order to achieve the above object, the present invention provides an injection device having a rotary nozzle for injecting high-pressure water toward a road surface, and is mounted on the injection device and is provided below the rotary nozzle. A shield rotatable between a first operating position facing the first operating position and a second operating position retracted from the lower position of the rotary nozzle, a lateral moving device for laterally moving the injection device along the guide rail, and a side of the injection device It comprises a lateral movement stop detection sensor for detecting a movement stop, and a driving means for rotating the shield to the first operating position based on a detection signal from the lateral movement stop detection sensor.

[0010] In a preferred embodiment, the shield is formed in an arcuate cross-section, and has a relief surface having a mountain-shaped cross-section through which high-pressure water escapes along the arc.

According to the high-pressure water injection device for roads, when the horizontal movement device stops for some reason during the operation of laterally moving while injecting high-pressure water from the rotary nozzle, the lateral movement stop detection sensor operates. The shield is rotated to a first operating position facing the lower part of the rotary nozzle. Thus, the high-pressure water from the rotary nozzle is instantaneously shut off by the shield, so that there is no occurrence of a deep digging in which only one location is concentrated.

Further, at the time of blocking by the shield, the high-pressure water
Since the pressure is guided along the relief surface, high pressure does not act, and the thickness of the shield can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to FIGS.

In FIG. 3, reference numeral 1 denotes a water tank truck provided with a water tank 3, 5 denotes a high-pressure pump mounted on a trailer 7, 9
Denotes a high-pressure water injection device for roads. The water in the water tank 3 is increased in pressure by a high-pressure pump 5 and is sent to a high-pressure water injection device 9 for roads through a high-pressure hose 11. .

The high pressure water injection device 9 for roads includes a guide rail 15 as shown in FIG.
An injection device 17 movable along the guide rail 15,
A lateral movement device 19 for laterally moving the injection device 17 is provided.

The guide rail 15 is fixed to the rear of the body 13 along the vehicle width direction and has upper and lower guide rail surfaces 15a, 15a. ing. The lower end of the scattering prevention plate 21 is a rubber skirt 23, and the lower end of the skirt 23 is in elastic contact with the road surface to prevent scattering to the outside.

As shown in FIG. 4, the horizontal moving device 19 is mounted on a moving subject frame 27 movably mounted on guide rail surfaces 15a of the guide rail 15 via guide rollers 25 facing vertically. And a hydraulic motor 31 for driving the drive gear 29 so that the drive gear 29 can rotate forward and reverse. The drive gear 29 is mounted on a rack 33 provided along the guide rail 15.
And are engaged. As a result, the drive gear 29 meshing with the rack 33 rotates forward or reverse, thereby causing the moving subject frame 2 to rotate.
Reference numeral 7 allows lateral movement along the guide rail surfaces 15a, 15a.

The hydraulic motor 31 is rotated forward or in response to a detection signal from the side detection switches 35, 35 when the moving subject frame 27 contacts the side detection switches 35, 35 provided on both sides of the guide rail 15. It is controlled so that it can be reversed.

As shown in FIG. 5, the injection device 17 is mounted on the moving main frame 27 and has a main body 37 to which the high-pressure hose 11 is connected, and a rotating shaft 39 rotatable with respect to the main body 37. And a rotary nozzle 41 provided at the lower end of the rotary shaft portion 39, and a shield 43 for blocking high-pressure water from the rotary nozzle 41.

The rotating shaft 39 is rotatably supported by a plurality of bearings 45, and is provided with a transmission gear 47. The transmission gear 47 meshes with a motor gear 51 driven by a hydraulic motor 49 arranged side by side with the apparatus main body 37, and rotational power from the hydraulic motor 49 is transmitted to the rotating shaft 39 via the motor gear 51 and the transmission gear 47. It is designed to be conducted.

The rotary nozzle 41 projects downward from an outer cylinder 55 surrounding the rotary shaft 39, and has a nozzle port 57.
Has a predetermined angle θ with respect to the center line X and rotates, so that a ring-shaped injection region is secured.

The shield 43 is formed in an arcuate cross section, and is rotatably supported at the lower end of the outer cylinder 55 by a mounting shaft 59 as shown in FIG. The rotation is controlled to a first operating position a (solid line in FIGS. 2 and 7) facing the lower part of the rotary nozzle 41 and a second operating position b (solid line in FIGS. 1 and 6) retracted from the lower part of the rotary nozzle 41. It has become so.

As shown in FIG. 9, a relief surface 63 having a mountain-shaped cross section for allowing high-pressure water to escape along an arc shape is provided inside the shield 43.
It has. Thus, the thickness of the shield 43 can be reduced, and quick response by the driving unit 61 is ensured.

The driving means 61 is of an air cylinder type comprising a piston 65 and a cylinder 67. The first and second air pipes 6 are connected to a cylinder 67 via a switching valve (not shown), one of which is used for supply and the other is used for release.
9 and 71, respectively, and the cylinder 67 is
The piston 65 is pivotally supported on the shield 43 side. The piston 65 extends when air is fed from the first air pipe 69, and the second air pipe 7
The air is supplied from 1 to reduce the size, and the extension of the piston 65 allows the shield 43 to rotate from the second operating position b to the first operating position a. In this case, the driving means 61 is not limited to the air cylinder type. For example, an appropriate means such as a hydraulic cylinder type may be implemented.

As shown in FIG. 4, the operation of the driving means 61 is controlled by a detection signal from a lateral movement stop detecting sensor 73 for detecting the rotation of the driving gear 29 of the lateral moving device 19 to stop the rotation of the driving gear 29. Upon detection, it functions to extend the piston 65 of the driving means 61 based on the detection signal.

According to the road high-pressure water injection device thus constructed, the driving gear 29 is driven when the lateral moving device 19 is driven.
Is in the rotating state, the shield 43 is in the second operating position b, which is retracted from the lower position of the rotating nozzle 41, and the rotating nozzle 4
The injection of high-pressure water according to 1 makes it possible, for example, to perform a filing operation or a roughening operation.

On the other hand, during work, for some reason,
When the lateral movement device 19 stops, the lateral movement stop detection sensor 73 detects the stop, and based on the detection signal, the shield 43 rotates from the second operation position b to the first operation position a facing the lower part of the rotary nozzle 41. Then, the injection of high-pressure water is shut off instantaneously.

At this time, since the high-pressure water escapes along the arc surface by the flank 63, large high-pressure water does not act on the shielding plate 43. For this reason, the thickness of the shielding plate 43 can be reduced, and the lightness of the shielding plate 43 allows quick response in switching.

[0029]

As described above, according to the present invention, the injection of high-pressure water can be instantaneously interrupted at the same time as the horizontal movement of the injection device is stopped. You will be able to prevent it.

Further, the relief surface having a mountain-shaped cross section allows the pressure of the high-pressure water to be released, so that the thickness of the shielding plate can be reduced and the responsiveness can be improved by reducing the weight.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a main part of a high-pressure road injection device according to the present invention.

FIG. 2 is an explanatory view similar to FIG. 1 in which a shield faces a lower part of a rotary nozzle.

FIG. 3 is an overall explanatory diagram showing one row of a working state.

FIG. 4 is an explanatory diagram showing a mounting relationship between the lateral movement device and the injection device with respect to the guide rail.

FIG. 5 is a schematic cross-sectional view of the injection device.

FIG. 6 is an explanatory diagram showing a mounting state of a cylinder and a piston serving as a driving unit.

FIG. 7 is an explanatory view similar to FIG. 6, in which a piston is extended.

FIG. 8 is an explanatory diagram showing an operation state of the road high-pressure injection device.

FIG. 9 is an enlarged sectional view taken along line AA of FIG. 8;

[Explanation of symbols]

 Reference Signs List 15 Guide rail 17 Injecting device 19 Lateral moving device 41 Rotating nozzle 43 Shielding body 61 Drive means 73 Lateral movement stop detection sensor a First operating position b Second operating position

Claims (2)

(57) [Claims] 1. An injection device having a rotary nozzle for injecting high-pressure water toward a road surface, a first operating position mounted on the injection device and facing a lower position of the rotary nozzle, and a second operating position retracted from a position below the rotary nozzle. A shield rotatable to an operating position, a lateral movement device for laterally moving the injection device along the guide rail, a lateral movement stop detection sensor for detecting lateral movement stop of the injection device, and a lateral movement stop detection Driving means for rotating the shield to the first operating position based on a detection signal from a sensor. 2. The shield according to claim 1, wherein the shield is formed in an arcuate cross-section, and has a relief surface having a mountain-shaped cross-section for allowing high-pressure water to escape along the arcuate surface inside. High pressure water injection device for roads.