JPH09158113A - High pressure water injection device for road - Google Patents

Abstract

PROBLEM TO BE SOLVED: To instantaneously cut off high pressure water through a rotary nozzle during the stop of lateral movement of an injection device. SOLUTION: A shielding body 43 rotatable to a first operation position fronting on a position below the rotary nozzle 41 and a second operation position moved backward from the rotary nozzle 41 by a drive means 61 is arranged at an injection device 17 having the rotary nozzle 41 to inject high pressure water toward a road. The injection device 17 is supported laterally movably along a guide rail 15 by a lateral movement device 19. Meanwhile, a high pressure water injection device for a road is provided with a lateral movement stop detecting sensor 73 to detect the stop of lateral movement of the injection device 17 and a drive means 61 to rotate the shielding body 43 to the first operation position based on detecting signals from the lateral movement stop detecting sensor 73. During the stop of lateral movement, the shielding body 43 is rotated to the first operation position and injection of high pressure water is instantaneously cut off.

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 jet device for roads, which is suitable for chipping work and road roughening work on road surfaces.

[0002]

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

An outline of a jetting device for jetting high-pressure water has a rotary nozzle for jetting high-pressure water while rotating, and a lateral moving device for laterally moving the rotary nozzle in accordance with a working width. By spraying water and moving laterally, it is possible to carry out chiseling work and roughening work on the road surface.

[0004]

In the chiseling work and the roughening work, high-pressure water acts on the road surface when the horizontal movement of the rotary nozzle is constant from the location where the high-pressure water is jetted while moving laterally. However, if the lateral movement stops due to an accident or the like, the high-pressure water concentrates on only a part of the road surface and continues to operate.

As a result, the high-pressure water causes a deep recess to be formed only in a part, so that when the lateral movement is stopped, an emergency stop means for stopping the operation of the pump for sending the high-pressure water to the rotary nozzle is adopted.

However, even if the emergency stop means works,
The injection pressure from the rotary nozzle becomes weak only when the high-pressure pump settles to idle rotation and the water in the water tank circulates, instead of instantly reducing the pressure. Further, there are long high-pressure hoses close to 60 meters, and it is the current situation that a time lag occurs from the time of an emergency stop to the time when the injection of the rotary nozzle is depressurized, and the occurrence of deepening is inevitable.

Particularly, the surface of the road surface is, for example, 1 to 2 mm.
This is a big problem in the roughening work for evenly flying the eyes.

Therefore, an object of the present invention is to provide a road high-pressure water jetting device capable of interrupting the jetting of high-pressure water from a rotary nozzle simultaneously with an emergency stop of lateral movement.

[0009]

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

As a preferred embodiment, the shield is formed to have an arcuate cross section, and is provided internally with a relief surface having a mountain-shaped cross section for releasing high-pressure water along the arcuate shape.

According to such a high-pressure water jetting device for a road, when the lateral moving device stops for some reason during the work of laterally moving while jetting high-pressure water from the rotary nozzle, the lateral movement stop detection sensor operates, The shield is rotated to a first operating position which faces the lower side of the rotary nozzle. As a result, the high-pressure water from the rotary nozzle is instantaneously blocked by the shield, so that the depth of digging in only one place does not occur.

Further, when shutting off by the shield, the high pressure water is
Since it is guided along the relief surface, high pressure does not act, and the shield can be thinned.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings of FIGS.

In FIG. 3, 1 is a water tank truck equipped with a water tank 3, 5 is a high-pressure pump mounted on a trailer 7, and 9 is a high-pressure pump.
Indicate high-pressure water jetting devices for roads, respectively, and the water in the water tank 3 has its pressure increased by the high-pressure pump 5 and is sent to the high-pressure water jetting device 9 for roads through the high-pressure hose 11. .

The high-pressure water jetting device 9 for a road has 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 portion of the machine body 13 along the vehicle width direction and has upper and lower guide rail surfaces 15a and 15a. Scatter prevention plates 21 are attached to the front and rear and both sides. ing. The lower end of the shatterproof plate 21 is a skirt 23 made of rubber, and the lower end of the skirt 23 makes elastic contact with the road surface to prevent the shattering to the outside.

As shown in FIG. 4, the lateral moving device 19 is mounted on a movable main frame 27 movably mounted on the guide rail surfaces 15a, 15a of the guide rail 15 via guide rollers 25, 25 facing each other vertically. A hydraulic motor 31 for driving the drive gear 29 so as to rotate forward and backward is mounted, and the drive gear 29 is 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 in the normal or reverse direction, whereby the movable main frame 2
7 can be moved laterally along the guide rail surfaces 15a, 15a.

In the hydraulic motor 31, when the movable main frame 27 comes into contact with the side detection switches 35, 35 provided on both sides of the guide rail 15, the hydraulic motor 31 is rotated normally or in response to a detection signal from the side detection switches 35, 35. It is designed so that it can be rotated in the reverse direction.

The injection device 17 is mounted on the movable main frame 27 as shown in FIG. 5, and also has a device main body 37 to which the high pressure hose 11 is connected, and a rotary shaft portion 39 rotatable with respect to the device 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 rotary shaft portion 39 is rotatably supported by a plurality of bearing portions 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 rotation shaft portion 39 via the motor gear 51 and the transmission gear 47. It is supposed to be conducted.

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

The shield 43 is formed in an arcuate shape in cross section and is rotatably supported by a mounting shaft 59 at the lower end of the outer cylinder 55 as shown in FIG. As a result, rotation control is performed between a first operating position a (see solid lines in FIGS. 2 and 7) that faces the lower side of the rotary nozzle 41 and a second operating position b (solid lines in FIGS. 1 and 6) retracted from the lower side of the rotary nozzle 41. It has become so.

Inside the shield 43, as shown in FIG. 9, a relief surface 63 having a mountain-shaped cross section that allows high-pressure water to escape along an arc.
It has. As a result, the shield 43 can be made thin, and the drive means 61 ensures quick response.

The drive means 61 is of the air cylinder type which comprises a piston 65 and a cylinder 67. The cylinder 67 has first and second air pipes 6, one of which is for supply through a switching valve (not shown) and the other of which is for escape.
9, 71 are provided respectively, and the cylinder 67 is an outer cylinder 55.
, The pistons 65 are pivotally supported on the shield 43 side. The piston 65 expands when the air is sent from the first air pipe 69, and the piston 65 expands.
When the air is sent from 1, the shield 43 is reduced and the shield 43 can be rotated from the second operating position b to the first operating position a by the extension of the piston 65. In this case, the driving means 61 is not limited to the air cylinder type. For example, suitable means such as a hydraulic cylinder type may be implemented.

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

According to the high-pressure water jetting device for a road thus constructed, the drive gear 29 is driven when the lateral moving device 19 is driven.
Is in a rotating state, the shield 43 is in the second operating position b retracted from the lower side of the rotary nozzle 41,
By injecting the high-pressure water by 1, for example, chiseling work or roughening work can be performed.

On the other hand, during work, for some reason,
When the lateral movement device 19 stops, the lateral movement stop detection sensor 73 detects it, 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 position of the rotary nozzle 41. Then, the injection of high-pressure water is cut off instantly.

At this time, the high pressure water escapes along the arcuate surface by the flank surface 63, so that the large high pressure water does not act on the shielding plate 43. For this reason, the shielding plate 43 can be made thinner, and the lighter the weight, the more responsive the switching is.

[0029]

As described above, according to the present invention, it is possible to instantaneously interrupt the injection of high-pressure water at the same time when the lateral movement of the injection device is stopped, so that a deep depth concentrated in one place can be prevented. You can prevent it in advance.

Further, the relief surface having a mountain-shaped cross section allows the pressure of the high-pressure water to escape, so that the shield plate can be made thinner and the response can be expected to be improved by reducing the weight.

[Brief description of the drawings]

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

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

FIG. 3 is an overall explanatory view showing a row of working states.

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

FIG. 5 is a schematic sectional view of an injection device.

FIG. 6 is an explanatory view showing a mounting state of a cylinder and a piston, which are driving means.

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

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

9 is an enlarged cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 15 guide rails 17 injection device 19 lateral movement device 41 rotary nozzle 43 shield 61 driving means 73 lateral movement stop detection sensor a first operating position b second operating position

Claims (2)

[Claims] 1. An injection device having a rotary nozzle for injecting high-pressure water toward a road surface, a first operating position which is mounted on the injection device and faces the lower part of the rotary nozzle, and a second retracted from the lower part of the rotary nozzle. A shield that is rotatable to the operating position, a lateral movement device that laterally moves the injection device along the guide rail, a lateral movement stop detection sensor that detects the lateral movement stop of the injection device, and a lateral movement stop detection A high-pressure water jetting device for a road, comprising: a drive unit that rotates the shield to a 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 arc shape in cross section, and is provided inside with a relief surface having a mountain shape in cross section for escaping high-pressure water along the arc surface. High-pressure water injection device for roads.