JPH106201A - Hydraulic grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain any flying-up of dust surely and effectively as well as to make improvements in lubricativeness by installing a cutter using a hydraulic turbine, turning after receiving pressurized water, as a power source and a spraying means dividing a part of the pressurized water and spraying the water toward the cutter from a spray nozzle both in a grinder body. SOLUTION: In time of applications, a high pressure coveying pump is driven, while a handle 15 is operated, making a valve element 12 turn to an on position, and an inflow port 18 and an exhaust port 21 are interconnected to each other via a water channel 20 of this valve element 12. If so, pressurized water out of a feed hose 38 is sprayed into a turbine room 6 from the exhaust port 21, a hydraulic turbine 10 is integrally rotated together with a cutter 9 by dint of pressure of the pressurized water. Water in the turbine room 6 is successively returned into a water tank from an outflow port 19 through a return hose 39. In addition, a part of the pressurized water flowing into the water channel 20 of the valve element 12 flows into a branch port 24, and this water flows in a conveying passage 26 and is sprayed toward the cutter 9 from a spray nozzle 25, whereby any flying-up of duct attendant upon cutting work of the cutter 9 is thus restrained from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic grinder for use in, for example, surface preparation of an outer wall of a building.

[0002]

2. Description of the Related Art For example, a grinder is used for cutting and peeling off a coating film on an outer wall of a building. In this type of conventional grinder, an electric motor is incorporated in a main body, and a disk-shaped cutter is driven and rotated by the electric motor, and the coating film is cut and removed by the cutter.

[0003] Here, when the coating film is cut by a cutter, dust generated by the cutting rises around and scatters, thereby deteriorating the working environment. Therefore, the outer circumference on one side of the cutter is covered with a cover, a suction hose led out of a dust collector separate from a grinder is connected to the cover, and dust accompanying the cutting of the coating film passes through the suction hose from the inside of the cover into the dust collector. In general, a means for suctioning is used.

[0004]

However, the dust resulting from the cutting of the coating film is fine and dry, so that it is difficult to sufficiently remove the dust by means of suction, and considerable dust scatters around the outer periphery of the cover. And the coating surface is dry, so there is no lubricity between the cutter and the coating surface, which prevents smooth rotation of the cutter and lowers work efficiency. turn into.

Further, the use of the dust collector causes a problem of clogging inside the dust collector, which requires periodic cleaning of the dust collector, which requires troublesome work for maintenance and inspection.

The present invention has been made in view of such a point, and it is an object of the present invention to reliably and effectively suppress the soaring of dust and to reduce the distance between a cutter and a coating film surface. An object of the present invention is to provide a grinder which can maintain a good lubricating property, does not require troublesome work of maintenance and inspection of a dust collector, and can efficiently perform a cutting operation.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a grinder main body, a water wheel that rotates by supplying high-pressure pressurized water, a cutter that rotates in conjunction with the water wheel, And a spraying means for spraying the water toward the cutter via a spraying nozzle, and the spraying means prevents soaring of dust.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show the structure of a hydraulic grinder. Reference numeral 1 denotes a grinder body, and the grinder body 1 is a bearing block 2.
And the turbine block 3 and the head block 4 are laminated,
It is fastened through a plurality of bolts 5.

A water turbine chamber 6 is formed inside the water turbine block 3, and a rotary shaft 8 is rotatably mounted on the bearing block 2 via a bearing 7. One end of the rotating shaft 8 protrudes below the bearing block 2, and a cutting cutter 9 is attached to the protruding portion. The other end of the rotating shaft 8 is a water turbine chamber in the bearing block 2. 6, and a water wheel 10 is attached to the protruding portion.

A guide chamber 11 is formed in the head block 4, and a valve body 12 is slidably housed in the guide chamber 11. A feed screw 13 is screwed into the valve body 12, and the feed screw 13 is rotatably supported via a bearing plate 14 mounted on an end face of the guide chamber 11. A handle 15 is attached to an end of the feed screw 13 protruding from the bearing plate 14. By rotating the feed screw 13 through the handle 15, the valve body 12 can be slid along the feed screw 13. I can do it.

An inlet 18 is formed on the side of the head block 4, an outlet 19 is formed on the side of the turbine block 3, and a water passage 20 is formed in the valve 12.
Further, the head block 4 is formed with an ejection port 21 for communicating the guide chamber 11 with the water turbine chamber 6.

As shown in FIG. 1, when the valve body 12 is disposed at the left end in the guide chamber 11, an opening at one end of the water passage 20 is joined to the inlet 18, and the water passage 20 is closed. The opening at the other end is connected to the jet port 21 so that the inflow port 18 and the jet port 21 communicate with each other.

Further, the valve body 12 is formed with a small-diameter branch hole 24 branching from the middle of the water passage 20, and a spray nozzle is provided in a part of the lower surface of the bearing block 2 so as to face the peripheral edge of the cutter 9. 25 are provided.

The grinder body 1 has the spray nozzle 2
A water passage 26 is formed to allow the valve 5 to communicate with the guide chamber 11 of the head block 4. When the valve body 12 is disposed at the ON position, the branch hole 24 is joined to an opening at an end of the water passage 26, Thereby, the water passage 20 of the valve body 12 communicates with the spray nozzle 25 via the water passage 26.

As shown in FIG. 2, the valve body 12 is moved rightward to the off position by operating the handle 15 so that the water passage 20 and the branch hole 24 are respectively formed by the wall surfaces of the guide chamber 11. It is designed to be closed.

A cover 27 made of an elastic material such as rubber is attached to the outer periphery of the bearing block 2 in a skirt shape, and the lower end of the cover 27 is arranged so as to be substantially flush with the lower end surface of the cutter 9. 27 covers the outer periphery of the cutter 9.

Connection pipes 28 and 29 are attached to the inflow port 18 and the outflow port 19, respectively. In addition, reference numeral 30 shown in FIG. 3 is a handle for handling the grinder body 1.

FIG. 4 shows a high-pressure water supply device.
Is a water tank, 36 is a high-pressure water pump, and a plurality of water-supply hoses 38 are led out of the high-pressure water pump 36 via a distributor 37. The distal end of the water supply hose 38 is connected to the inflow port 18 of the grinder body 1 via the connection pipe 28. A return hose 39 is connected to the outlet 19 of the grinder main body 1 via a connection pipe 29, and the return hose 39 is introduced into the water tank 35 of the high-pressure water supply device.

Each of the water supply hose 38 and the return hose 39 has a length of, for example, about 30 m, and is wound around a reel 40, and can be pulled out by a required length as needed.

When using the grinder constructed as described above, the high-pressure water pump 2 of the high-pressure water supply device is placed under the condition that the valve element 12 is located at the off position as shown in FIG.
7 and pull out the water supply hose 38 and the return hose 39 from the reel 40 by a required length.

Then, the handle 15 is operated to place the valve body 12 at the ON position as shown in FIG. 1, and the grinder body 1 is handled via the handle 30.
The cutter 9 is pressed against, for example, the coating surface of the outer wall of the building.

When the valve element 12 is located at the ON position, the inflow port 18 and the jet port 21 communicate with each other through the water passage 20 of the valve element 12, and the high-pressure water supplied from the high-pressure water pump 37 through this communication. Pressurized water is sequentially jetted from the jet port 21 into the water turbine chamber 6, and the pressure of the pressurized water causes the water turbine 10 to rotate integrally with the rotating shaft 8 and the cutter 9. Through the water tank 36.

The pressure at which water is jetted into the water turbine chamber 6 is adjusted via the distributor 37 of the high-pressure water supply device so that the cutter 9 rotates at a predetermined rotation speed. Thus, the cutter 9 rotates by the supply of the pressurized water. By pressing the cutter 9 against the coating surface of the outer wall of the building, the coating surface can be cut, peeled and removed.

On the other hand, a part of the pressurized water flowing in the water passage 20 of the valve body 12 flows into the branch hole 24, and the water flows through the water passage 26 and is sprayed from the spray nozzle 25 toward the cutter 9. The sprayed water droplets diffuse on the cover 27. Therefore, moisture is included in the dust of the coating film due to the cutting by the cutter 9, and the dust does not soar so that the dust is quickly settled.

Further, the surface of the coating film to be cut by the cutter 9 becomes wet due to the water droplets sprayed from the spray nozzle 25, so that the lubricity between the cutter 9 and the coating film surface can be kept good. Thereby, smooth rotation of the cutter 9 is obtained, and efficient work can be achieved. Further, since the dust collector is not used, the troublesome work of maintenance and inspection of the dust collector is unnecessary, and the cutting operation can be further efficiently performed.

When the valve body 12 is arranged by operating the handle 15 during the work or at the end of the work, the water passage 20 and the branch hole 24 of the valve body 12 are closed by the wall surface of the guide chamber 11, so that the cutter 9 is closed. The rotation stops, and the spray of water from the spray nozzle 25 stops.

The grinder according to the present invention is not limited to the case where the coating film is cut and removed, but is also used when the foreign material layer adhering to the outer wall surface or the floor wall surface of the building is cut and removed. It goes without saying that you can do it.

[0028]

As described above, according to the glider of the present invention, the rise of dust can be reliably and effectively suppressed, so that a good working environment can be maintained, and the gap between the cutter and the coating surface can be improved. The lubrication property can be improved, the cutter can be smoothly rotated, the workability can be improved, and the troublesome work of maintenance and inspection of the dust collector is not required, so that the cutting work can be more efficiently performed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a hydraulic grinder according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view when the valve body of the hydraulic grinder is arranged at an off position.

FIG. 3 is a front view of the hydraulic grinder.

FIG. 4 is a configuration diagram showing a system for supplying high-pressure pressurized water to the hydraulic grinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Grinder main body 9 ... Cutter 10 ... Waterwheel 25 ... Spray nozzle 36 ... High-pressure water pump

Continuing from the front page (72) Inventor Yoshio Yamazaki 3-18-10 Motoasakusa, Taito-ku, Tokyo Inside I-Rec Giken Co., Ltd. (72) Inventor Kenjiro Motai 1-12-14 Motoren, Kawaguchi-shi, Saitama (72) Inventor Masuda ▲ Taka ▼ Kichi 1085-9, Maruho, Uwajima-shi, Ehime Pref.

Claims (1)

[Claims] 1. A water wheel that rotates by supplying high-pressure pressurized water to a grinder body, a cutter that rotates in conjunction with the water wheel, and a part of the pressurized water that is diverted and directed toward the cutter via a spray nozzle. And a spraying means for spraying the water.