JPH10151621A - Water jet chipping apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water jet chipping apparatus enabling the optimum chipping work capable of simply altering a chipping diameter of a high pressure water nozzle, not requiring a joint connecting a rotary and fixed sides of a swivel joint, capable of being simply moved to a place performing construction and easy to automate chipping work. SOLUTION: A rotary shaft 11 allowing a high pressure water tube to revolve around the center O of rotation in a revolution radius R is provided and the distances R1, R2, R3 between the centers of mounting holes 12-1, 12-2, 12-3 and the center 0 of rotation of the rotary shaft are different and, by selecting the mounting holes for mounting the high pressure water tube 1, a revolution radius can be altered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water jet having a high-pressure water nozzle for jetting high-pressure water onto a concrete surface or the like of a structure such as a road or a bridge to remove the concrete surface or the like. It concerns the device.

[0002]

2. Description of the Related Art Conventionally, concrete surfaces of roads and bridges that require repairs due to salt damage or aging are peeled off by mechanically applying impact vibration using a pick hammer or a breaker. The vine method is adopted. However, the method of mechanically applying impact vibration is a work involving vibration, and the work involving mechanical vibration is restricted in the continuous working time, so it is necessary to secure many skilled workers. There is a problem that there is such a problem that the work environment is deteriorated due to generation of dust such as concrete.

[0003] Further, the mechanical shock gives rise to a problem that loud noise is generated and the working time zone is restricted, and the mechanical shock gives rise to not only the parts requiring concrete repair, but also There is a problem that cracks are generated in the healthy part of the concrete, and there is a possibility that reinforcing members such as reinforcing bars may be damaged. In order to solve the above problem, there has been proposed a device for spraying ultra-high pressure water (water pressure of about 2500 kg / cm ² ) from a high pressure water nozzle to break a concrete surface, a so-called water jet hanging device.

FIG. 8 is a diagram showing a schematic configuration of a swivel type nozzle unit used in the above-mentioned conventional water jet lifting device. As shown, a conventional swivel-type nozzle unit includes a bearing 10 in a casing 101.
The casing 101 includes a shaft 102 rotatably supported by the shafts 3 and 103.
Is formed, and a high-pressure water flow path 1 is formed at the center of the shaft 102.
08 is formed. Further, a high-pressure water nozzle 109 is connected to the tip of the shaft 102,
8 and the high-pressure water flow path 10 formed in the high-pressure water nozzle 109
9a is connected. 104 is the inflow port 10
Reference numeral 105 denotes a high-pressure seal disposed on both sides of the motor 6, and a motor for rotating the shaft 102.

[0005] In the nozzle unit having the above-described configuration, the ultra-high-pressure water (water pressure of about 25
00 kg / cm ² ) flows into the inflow port 106, passes through the high-pressure water flow path 108 of the rotating shaft 102, and is jetted from the tip of the high-pressure water flow path 109 a of the high-pressure water nozzle 109 as a water jet to the suspension surface of the structure. As a result, the stripping surface of the structure is stripped. In order to make the water jet ejected from the high-pressure water nozzle 109 draw a circular trajectory, the tip of the high-pressure water channel 109a is provided at a position shifted from the center by a predetermined amount.

[0006]

However, the above-mentioned conventional water-jet suspension device is a high-pressure water nozzle 1
Since 09 is a rotating structure, its mounting structure is complicated and it is difficult to change the mounting position of the nozzle and obtain an appropriate hanging diameter according to the material of the surface of the structure to perform an optimum hanging operation. . In addition, since the high-pressure water nozzle 109 is configured to rotate, a joint such as a swivel joint having a high-pressure seal 104 is required between the rotating shaft 102 and the fixed casing 101, and water leakage occurs from the joint. There was a problem such as doing. Also, the equipment becomes large,
There is also a problem that it takes time to install the device at the place where the construction is performed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to easily change a hanging diameter of a high-pressure water nozzle, to perform an optimum hanging operation, and to connect a rotating side and a fixed side of a swivel joint or the like. An object of the present invention is to provide a water jet apparatus which can be easily moved to a place where a construction is performed without requiring a work, and which can easily automate a fishing operation.

[0008]

According to a first aspect of the present invention, there is provided a water jet having a high-pressure water nozzle for jetting high-pressure water toward a hanging surface of a structure. , High-pressure water nozzle with rotation center O
, A revolving means for revolving around a revolving radius R is provided.

According to a second aspect of the present invention, in the water jet suspension device according to the first aspect, the revolving means includes a rotary shaft that rotates about a rotation center O, and the high-pressure water nozzle is connected to the rotary shaft. The revolving radius R can be changed by changing the distance between the mounting position of the high-pressure water nozzle and the center of rotation O.

According to a third aspect of the present invention, there is provided a water jet suspender according to the first or second aspect,
A high pressure water nozzle position setting means for arbitrarily setting the distance between the tip of the high pressure water nozzle and the hanging surface of the structure is provided.

According to a fourth aspect of the present invention, in the water jet suspension device according to the first or second or third aspect, the high-pressure water nozzle swivels within the hanging surface along the hanging surface. Means is provided.

According to a fifth aspect of the present invention, there is provided a water jet suspension apparatus according to the second, third or fourth aspect, wherein the high-pressure water nozzle is provided with a high-pressure water nozzle device means rotatably mounted on a rotary shaft. In addition, the rotary shaft is configured to release a rotational force applied to the high-pressure water nozzle by rotation of the rotary shaft.

According to a sixth aspect of the present invention, in the water jet suspension device according to any one of the first to fifth aspects, at least a high-pressure water nozzle and a revolving means for revolving the high-pressure water nozzle are self-propelled vehicles. It is characterized by being mounted on.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a schematic configuration example of a nozzle unit used in a water jet suspension device of the present invention, wherein FIG. 1 (a) is a sectional view and FIG. 1 (b) is a plan view. In the figure, 1 is a high-pressure water tube, the tip of which is a high-pressure water nozzle. The high-pressure water tube 1
Are inserted into a cylindrical nozzle holder 10, and the high-pressure water tube 1 is attached together with the nozzle holder 10 to mounting holes 12-1, 12-2, 12-provided in a rotary shaft 11.
3 can be detachably mounted.

That is, for example, when the nozzle holder 10 into which the high-pressure water tube 1 is inserted is moved from the mounting hole 12-1 of the rotary shaft 11 to the mounting hole 12-2, the stopper pin 15 is provided on the rotary shaft 11 with a screw. Hole 1
4, the high-pressure water tube 1 is pulled out together with the nozzle holder 10 from the mounting hole 12-1, and then the high-pressure water tube 1 is pulled out together with the nozzle holder 10 into the mounting hole 12-.
2, the high-pressure water tube 1 is inserted into the mounting holes 12-1 to 12- by aligning the recess 10a provided in the flange 10b of the nozzle holder 10 with the screw hole 14, and screwing the stopper pin 15 into the screw hole 14. 2 can be easily transferred and mounted.

Reference numeral 13 denotes a casing, and the rotary shaft 11 has bearings 3, 3 inside the casing 13.
It is rotatably supported by. Reference numerals 2 and 2 denote oil seals, 5 an idle gear fixed to the rotary shaft 11, 4 a drive gear meshing with the idle gear, and 9 a motor for driving the drive gear 4. Reference numerals 6 and 6 denote collars, 7 denotes a C-shaped retaining ring, and 8 and 8 denote flanged bushes. The high-pressure water tube 1 can rotate inside the nozzle holder 10.

In the nozzle unit having the above structure, the rotary shaft 11 rotates about the rotation center O via the drive gear 4 and the idle gear 5 by activating the motor 9. Mounting holes 12-1, 12-2, 12
The center of -3 is apart from the rotation center O, and the distances R1, R2, R3 are different from each other.
Therefore, when the rotary shaft 11 rotates, the high-pressure water tube 1 revolves around the center of rotation O, and the orbital radius R1 has the mounting holes for inserting the high-pressure water tube 1 in the mounting holes 12-1 and 12-2. , 12-3.

A high-pressure water supply pipe 17 connected to an ultra-high-pressure water inlet 16 provided at the upper portion of the high-pressure water tube 1 is connected, and ultra-high-pressure water (water pressure of about 2500 /
cm ² ), the ultra-high-pressure water passes through the high-pressure water flow path 1 a in the high-pressure water tube 1 and is jetted as a water jet from the high-pressure water nozzle at the tip thereof. At this time, the water jet is sprayed on the slant surface of the structure while drawing the orbit of the high-pressure water tube 1, that is, the slant diameter. The rotary shaft 11
The distances R1, R2, R3 between the center of rotation O and the centers of the mounting holes 12-1, 12-2, 12-3 are, for example, 20 mm, 30
mm and 40mm, the hanging diameter is 40φ,
60φ and 80φ.

Further, as the rotary shaft 11 rotates, the high-pressure water tube 1 moves the rotation center O as described above.
Revolves around. Therefore, since the center of the high-pressure water channel 1a can be made to coincide with the center of the high-pressure water tube 1 and can be made straight, the structure of the high-pressure water tube 1, that is, the structure of the high-pressure water nozzle can be simplified.

A rotational force acts on the connection between the high-pressure water tube 1 and the high-pressure water supply pipe 17 with the revolution.
Since the high-pressure water tube 1 can rotate inside the nozzle holder 10 as described above, the rotation of the high-pressure water tube 1 can release (absorb) the rotational force acting on the connecting portion. That is, the present nozzle unit is used to supply ultra-high pressure water from the high pressure water source to the high pressure water tube 1, and to supply the high pressure water supply pipe 1 to the high pressure water inlet 16 of the high pressure water tube 1.
7 can be easily and rigidly connected, and there is no need for a joint for securely connecting the fixed side and the rotating side unlike a swivel joint, so that there is no fear that ultra-high pressure water leaks from this connection portion.

In the above-described embodiment, the insertion hole for inserting the high-pressure water tube 1 in the nozzle holder 10 is provided so that the center line of the nozzle holder 10 and the center line of the insertion hole coincide with each other. The hole 10c may be provided to be inclined with respect to the center line of the nozzle holder 10 as shown in FIG. 2, and the high-pressure water tube 1 may be revolved at an angle to the vertical direction.

FIGS. 3 and 4 show a state in which the nozzle unit is mounted on a self-propelled carriage. FIG. 3 is a plan view and FIG.
Is a side view. The self-propelled trolley equipped with the nozzle unit is provided with a front wheel 30 and a rear wheel 31, and is configured to be able to move forward and backward by receiving a driving force from the traveling motor 23 and rotating the rear wheel 31 forward and backward. I have. Reference numeral 25 denotes a nozzle unit base on which the nozzle unit 18 is mounted. The nozzle unit base 25 is attached to a tip of an arm 22 that pivots around a support shaft 19, and a ball screw nut 20 is attached to the arm 22. Ball screw nut 20
Is screwed into a ball screw 34, and the ball screw nut 20 is moved right and left by rotating the ball screw 34 forward and backward.

Reference numeral 29 denotes a nozzle left / right movement motor for rotating the ball screw 34 in the forward and reverse directions. For example, when the ball screw 34 is rotated forward by the forward / reverse rotation of the nozzle left / right movement motor 29, the ball screw nut 20 moves to the right and the arm moves. 22 also moves, the arm 22 comes into contact with the right limit switch 21, and when the limit switch 21 is actuated,
Reverse the nozzle left / right movement motor 29 and
4 rotates the ball screw nut 20 and the arm 22 to the left, and the left limit switch 21
Then, when the limit switch 21 operates, the nozzle left / right movement motor 29 is rotated forward again. Thus, the left and right movement of the arm 22 is controlled by the left and right limit switches 2.
The arm 22 turns left and right within the installation range of the limit switch 21 by detecting at 1 and rotating the nozzle left / right movement motor 29 forward and backward. Thereby, the high-pressure water tube 1 of the nozzle unit 18 also turns left and right.

By rotating the arm 22 as described above, the rotary shaft 11 of the nozzle unit 18 is rotated.
The rotation center O of FIG. 7 also turns along a turning locus A as shown in FIG. Then, the high-pressure water nozzle at the tip of the high-pressure water tube 1 also rotates around the turning trajectory while drawing a trajectory B having a hanging radius R. Accordingly, the locus of the water jet hanging surface is like locus B.

Reference numeral 27 designates a nozzle unit base 25 which is moved up and down,
A nozzle up / down handle for adjusting the distance between the tip of the high-pressure water tube 1 and the hanging surface of the structure, and 28 is a nozzle angle adjusting handle for adjusting the left / right angle of the high-pressure water tube 1 with respect to the hanging surface. Reference numeral 32 denotes an operation panel,
The number of rotations of the motor 9 for rotating the rotary shaft 11 on the operation panel 32, the number of rotations of the motor 29 for rotating the nozzle left and right for rotating the arm 22 to rotate the high-pressure water tube 1, the number of rotations of the motor 23 for traveling, etc. It is possible to set various control amounts necessary for the operation.

The nozzle up / down handle 27 is used to set the distance between the high-pressure water tube 1 and the tip of the high-pressure water nozzle and to the hanging surface. By setting the number of revolutions of the motor 29 and the number of revolutions of the traveling motor 23, it is possible to automatically hang a hanging surface such as a road surface at a constant speed while jetting a water jet from the tip of the high-pressure water tube 1. it can.

Although the self-propelled bogie has the front wheel 30 and the rear wheel 31 in the above embodiment, as shown in FIGS. 5 and 6, the self-propelled bogie uses a crawler 35 instead of wheels. A traveling trolley may be used. In FIGS. 5 and 6,
3 and 4 denote the same or corresponding parts, and the functions thereof are substantially the same, so that the description thereof will be omitted.

[0028]

As described above, according to the invention described in each claim of the present application, the following excellent effects can be obtained. (1) According to the first aspect of the present invention, since the revolving means for revolving the high-pressure water nozzle around the rotation center O with the revolving radius R is provided, the high-pressure water nozzle does not rotate. There is no need for a joint for connecting the rotating side and the fixed side, and there is no need to worry about leakage of ultra-high pressure water.
In addition, even if the high-pressure water nozzle has a simple linear structure, the diameter of the water jet can be obtained, and the structure of the high-pressure water nozzle becomes simple.

(2) According to the second aspect of the present invention, the revolving means includes a rotary shaft that rotates about a rotation center O, and the high-pressure water nozzle is configured to be freely attached to the rotary shaft. Since the orbital radius R can be changed by changing the distance between the mounting position of the high-pressure water nozzle and the rotation center O, the mounting and dismounting of the high-pressure water nozzle is easy, and the material of the hanging surface is It is possible to change the hanging diameter of the water jet according to the condition.

(3) According to the third aspect of the present invention, since there is provided a high-pressure water nozzle position setting means for arbitrarily setting the distance between the tip of the high-pressure water nozzle and the suspension surface of the structure, the suspension surface is provided. The distance between the tip of the high-pressure water nozzle and the hanging surface can be adjusted according to the material state of the nozzle.

(4) According to the fourth aspect of the present invention, since the high pressure water nozzle is provided with the high pressure water nozzle turning means for turning the high pressure water nozzle along the hanging surface, the diameter of the turning by the revolution along the turning locus is provided. You can do hanging work by drawing a circle.

(5) According to the fifth aspect of the present invention, since the high-pressure water nozzle is rotatably mounted on the rotary shaft, the rotational force applied to the high-pressure water nozzle due to the rotation of the rotary shaft is released. Therefore, the connection between the high-pressure water nozzle and the pipe for supplying the ultra-high-pressure water may be a rigid structure, which is a simple structure.

(6) According to the invention of claim 6, since the high-pressure water nozzle and the revolving means for revolving the high-pressure water nozzle are mounted on the self-propelled bogie, the hanging operation can be automated. Becomes easier.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration example of a nozzle unit used in a water jet apparatus of the present invention;
1A is a sectional view, FIG. 1B is a plan view, and FIG. 1C is a view showing details of a fixing portion of the nozzle holder.

FIG. 2 is a diagram illustrating a configuration example of a nozzle holder used in a water jet suspension device of the present invention.

FIG. 3 is a plan view showing an example of the overall configuration of the water jet suspension device of the present invention.

FIG. 4 is a side view showing an example of the overall configuration of the water jet suspension device of the present invention.

FIG. 5 is a plan view showing an example of the overall configuration of the water jet suspension device of the present invention.

FIG. 6 is a side view showing an example of the overall configuration of the water jet suspension device of the present invention.

FIG. 7 is a view showing a trajectory of the water jet of the water jet of the present invention.

FIG. 8 is a diagram showing a schematic configuration of a swivel type nozzle unit used in a conventional water jet suspension device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 high-pressure water tube 2 oil seal 3 bearing 4 drive gear 5 idle gear 6 collar 7 C-shaped retaining ring 8 flanged bush 9 motor 10 nozzle holder 11 rotary shaft 12-1 to 3 mounting hole 13 casing 14 screw hole 15 stopper pin 16 Ultra high pressure water inlet 17 High pressure water supply pipe 18 Nozzle unit 19 Support shaft 20 Ball screw nut 21 Limit switch 22 Arm 23 Traveling motor 25 Nozzle unit base 27 Nozzle up / down handle 28 Nozzle angle adjusting handle 29 Nozzle left / right moving motor 30 Front wheel 31 Rear wheel 32 Operation panel 34 Ball screw 35 Crawler

Claims (6)

[Claims] 1. A water jet having a high-pressure water nozzle for jetting high-pressure water toward a hanging surface of a structure, the water jet being a suspension device, wherein the high-pressure water nozzle revolves around a rotation center O with a revolving radius R. The water jet is a suspension device provided with a means. 2. The revolving means includes a rotary shaft that rotates about the rotation center O. The high-pressure water nozzle is configured to be freely mounted on the rotary shaft. The water jet suspension device according to claim 1, wherein the orbital radius R can be changed by changing the distance of the rotation center O. 3. The water jet according to claim 1, further comprising a high-pressure water nozzle position setting means for arbitrarily setting a distance between a tip of the high-pressure water nozzle and a hanging surface of the structure. apparatus. 4. A water jet suspension apparatus according to claim 1, further comprising a high pressure water nozzle swiveling means for swirling the high pressure water nozzle in the suspension plane along the suspension plane. 5. A high-pressure water nozzle mounting means for rotatably mounting the high-pressure water nozzle on the rotary shaft, wherein the rotation force applied to the high-pressure water nozzle due to the rotation of the rotary shaft is escaped. The water jet suspension device according to claim 2, wherein the water jet is suspended. 6. The water jet according to claim 1, wherein at least the high-pressure water nozzle and revolving means for revolving the high-pressure water nozzle are mounted on a self-propelled bogie. apparatus.