JPH0780085B2 - Water injection device for drilling equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a water injection device for a drilling device.

[Conventional technology]

A conventional water injection device will be described with reference to FIG. 4 showing the water injection device, taking Japanese Utility Model Publication No. 61-16008 as an example. As shown in the figure, the water injection device is a rotary tool 1
Is provided inside the diamond core bit 2 which is a drilling tool for performing a drilling work, and when the diamond core bit is drilled, the cutting surface is lubricated with water stored therein.

With the water injection device of the perforation tool configured as described above, the diamond core bit 2 is kept in the upward state and water is directly introduced from the opening side, and then the guide pin 3 and the pressing plate 4 are provided at the tip end.
The hydrous elastic body 5 provided with and is inserted. In the figure, 6 is a waterproof cover.

[Problems to be Solved by the Invention]

In the above-mentioned conventional technique, every time water is supplied into the diamond core bit, it is not only necessary to always perform a troublesome work of holding the rotating tool or the diamond core bit upward with one hand, but the water will rotate unless water is carefully supplied. There was a drawback that it would affect the tool. To prevent this, you can attach a waterproof cover to the tip of the rotary tool.
The tool body becomes expensive.

Further, in the conventional water injection device of the drilling device, when the surface of the concrete is uneven and the water-containing elastic body cannot rotate in the diamond core bit, it cannot follow the rotational movement of the diamond core bit, and the surface is There is a drawback in that the injection device is seriously damaged and the life of the injection device becomes early.

The present invention has been made in view of the above points, and an object of the present invention is to provide a water injection device for a perforation tool, which is simple in water injection and has a long life.

[Means for Solving the Problems]

The above-mentioned purpose is to install a water injection device in a perforating device so that it can be attached freely, and to the expandable and contractible water tank having an opening at its tip, and at the center of the opening side of the water tank. This is achieved by forming a rotatable disc having a hole and a water-containing elastic body that is detachably attached to the disc on the tip side of the punching instrument.

[Action]

A water injection device is provided so that it can be freely installed inside a drilling instrument, and has a retractable water tank having an opening at its tip, and a water tank provided at the opening side in this water tank and having a hole at its center. Since it was made up of a movable disc and a hydrous elastic body that was detachably attached to the disc on the tip side of the drilling device, the water tank was taken out from the diamond core bit when pouring, and the hydrous elastic body was removed from the disc. It can be removed and poured into a water tank through a hole in a disk, which eliminates the need to hold a rotating tool or a diamond core bit with one hand each time water is poured, making water filling simple. Also, even if the concrete surface has irregularities, the disc rotates following the rotation of the diamond core bit, so the hydrous elastic body that is detachably attached to the disc rotates inside the diamond core bit as in the past. It will not be in an impossible state, damage to the surface will be prevented, and the life will be long.

〔Example〕

Hereinafter, the present invention will be described based on the illustrated embodiments. 1 to 3 show an embodiment of the present invention.
Since the same parts as those of the prior art are designated by the same reference numerals, the description thereof will be omitted. In this embodiment, a water injection device is provided inside the diamond core bit 2 so that it can be attached freely, and an opening is formed at the tip thereof.
A stretchable water tank 7 having 7b, a rotatable disk 8 provided on the opening side in the water tank 7 and having a hole 8 in the center thereof, and a circle on the tip side of the diamond core bit 2. The plate 8 and the water-containing elastic body 5 detachably provided were used. By doing so, water can be poured without holding the rotary tool 1 or the diamond core bit 2 as in the conventional case, and the water-containing elastic body 5 has the conventional diamond core bit even if the concrete surface is uneven. It is possible to obtain a water injection device for a perforation tool that does not become a non-rotatable state in 2 and is simple in water injection and has a long life.

That is, as shown in FIG. 1, the water injection device includes a water tank 7 for storing water, a disk 8 arranged at the opening of the water tank 7, and a water-containing material detachably attached to the disk 8. The elastic elastic body 5, the first sheet 9 and the second sheet 10 fixed to the respective contact portions of the disk 8 and the hydrous elastic body 5 are constituted.

Each component will be described below.

The water tank 7 is formed of a thin plastic material, has a bottomed cylindrical shape, and has an outer peripheral portion which is a bellows portion 7a which is movable in a longitudinal direction so as to be expandable and contractible. As shown in FIG. 2, the tip of the water tank 7 has an opening 7b having the same diameter as the inner diameter of the bellows 7a, and a disc 8 is formed in the opening 7b.
Is rotatably mounted. The disk 8 can be easily inserted by molding the water tank 7 and the molding at the same time.
Once mounted, the disc 8 does not come off in the axial direction due to the inner diameter step of the bellows portion 7a, and the proper gap A between the disc 8 and the bellows inner portion allows smooth movement in the rotational direction.

Further, on the surface of the circular plate 8, a first sheet 9 having substantially the same shape as the circular plate 8 and in which a plurality of elastic fishing pieces are planted is attached by an adhesive or the like. Further, the water-containing elastic body 5 has a cylindrical shape, the end face portion of which is detachably coupled to the first sheet 9 and which is made of a non-woven fabric as a base material for imparting a locking force in the rotation direction. A second sheet 10 of buff cloth is attached with an adhesive or the like. The first sheet 9 and the second sheet 10 have substantially the same shape.

The water injection device configured as described above will be described below in accordance with the perforation procedure. First, the water tank 7 is taken out of the body of the diamond core bit 2, and a part of the periphery of the water-containing elastic body 5 is grabbed and strongly pulled up. The plurality of elastic fishing pieces of the sheet 9 of No. 1 temporarily extend slightly, and the hydrous elastic body 5 separates from the disc 8. Then, when water is poured into the water tank 7 from the hole 8a of the disk 8 so as to be almost fully distributed, the water-containing elastic body 5 is attached to the disk 8 again. During this time, the diamond core bit 2 only needs to be placed in a predetermined position, so the work is very easy. Then, the water tank 7 is loaded into the diamond core bit 2 again, and the water supply operation is completed. Regarding the water injection work, as shown in FIG. 3, as the drilling work progresses, the bellows portion 7a shrinks and the internal pressure increases, and the water in the water tank 7 passes through the hole 8a of the disk 8. Hydrous elastic body 5
Be carried to. The water injected into the water-containing elastic body 5 is sent from the tip to the opening along the inner wall of the body of the diamond core bit 2 by the action of centrifugal force, wets the cutting edge and the cutting surface, and is cooled and lubricated.

Even if the concrete surface is uneven, the hydrous elastic body 5 is deformed into unevenness following the concrete surface.
Since a strong locking force is applied to the rotation direction by the sheet 9 and the second sheet 10 of FIG. 1, the disk 8 arranged in the water tank 7 is set to the diamond core bit 2 in an attempt to make the rotation impossible. Because it rotates following the rotation of
The water-containing elastic body 5 does not become non-rotatable, rotates with the disk 8 and is not damaged.

As described above, according to the present embodiment, since the water tank which can be expanded and contracted in the longitudinal direction and which can easily supply water is arranged in the diamond core bit so as to be freely inserted and removed, the main body is supported every time water is supplied, and the main body is waterproofed. The drawbacks of the prior art, such as the construction, can be eliminated. Further, since the water-containing elastic body arranged at the tip of the water tank can be rotated in the water tank via the disc, the water-containing elastic body is not damaged and the life of the water injection device is greatly extended. Can be improved.

〔The invention's effect〕

As described above, the present invention makes it easy to inject water and has a long life.
It is possible to obtain a water injection device for a perforation tool that is easy to inject and has a long life.

[Brief description of drawings]

FIG. 1 is a vertical side view of an embodiment of a water injection device for a drilling device of the present invention, FIG. 2 is an enlarged vertical side view of the tip of FIG. 1, and FIG. FIG. 4 is a vertical cross-sectional side view of a conventional water injection device for a perforating device. 1 is a rotary tool, 2 is a diamond core bit (piercing tool), 5 is a water-containing elastic body, 7 is a water tank, 7a is a bellows part,
7b is an opening, 8 is a disk, 8a is a hole, 9 is the first sheet, 10
Is the second sheet.

Claims (3)

[Claims] 1. A drilling device attached to the tip of a rotary tool, and a watering device for a drilling device, wherein a cutting surface is wetted by water stored in the drilling device, wherein an opening is provided in the drilling device. An irrigation device for a perforating device, comprising: a water tank that can be freely expanded and contracted, and a disk having a hole in a central portion disposed in the water tank and a water-containing elastic body that is detachable. 2. A disk provided with a first sheet having elastic fishing pieces, and a second disk having fibers engaging with the elastic fishing pieces.
The water injection device for a perforating device according to claim 1, wherein the water-containing elastic body provided with the sheet is detachably provided. 3. The water injection device for a perforating device according to claim 1, wherein the water tank is made of plastic and has a bellows portion.