JP2561501B2 - Concrete drilling equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a concrete drilling device for providing a hole for installing an anchor bolt or the like mainly on a wall surface or a floor surface in a room where OA equipment or the like is present, and particularly to drilling a hole. It relates to things that do not scatter water or dust inside.

[Prior art]

There are two methods for drilling concrete: a vibration drill and a cylindrical diamond core bit. Since the former is extremely noise and dusty,
Drilling work is not suitable where equipment is used. Next, the method using a diamond core bit is relatively vibration-free, but sufficient cooling water supplied directly from a water tap or from a tank located at a high place was used for drilling work. This cooling water cools the blade of the diamond core bit and prevents the diamond powder contained in the blade from burning. For that reason, conventionally, a relatively large amount of water was supplied from the inside of the core while the boring operation was performed. However, such cooling water is not particularly suitable for drilling work in a room having OA equipment.

[Means for solving problems]

Therefore, the present invention supplies water in a spray state together with air,
Water is easily evaporated by heating the blade during drilling, so that cooling water does not flow out to the wall surface or floor surface.
The configuration is as follows.

That is, a diamond core bit 2 having a rear end portion formed of a hollow body connected to a rotary drive source and having a blade portion 1 dispersedly at the tip end, and one end communicating with a pneumatic pressure source 3 and the other end having the bit 2 Air conduit 4 communicating with the hollow part of
And interposed between the bit 2 and the air pressure source 3,
An air-water mixing device (5) for mixing water into the air flowing through the air conduit (4) in a mist state, wherein the air-water mixing device (5) is mixed with the mist-like water in the air conduit (4). A water amount adjusting means for adjusting the amount of water is provided so that the atomized water evaporates due to heat generated by the perforation of the bit 2 and the water does not flow out of the perforation. It is a concrete drilling device.

[Action]

Therefore, according to the concrete perforation apparatus, mist-like water is mixed with air by the steam mixing apparatus 5 and the air is supplied to the hollow portion of the diamond core bit 2. Then, it is guided to the blade portion 1 and evaporates due to the heat generated during perforation, and the blade portion 1 can be cooled by the evaporation heat. At the same time, the water vapor after cooling is released into the dust collector or the atmosphere, and there is no risk of wetting the wall surface or floor surface.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory schematic diagram of the present device, and FIG. 2 is an explanatory diagram of performing concrete drilling work using the same device. In this embodiment, the punching machine 17 is provided with a rotary shaft 18 driven by power as shown in FIG. 1. The rotary shaft 18 is formed so that at least its tip is hollow, and the diamond core bit 2 is attached to the tip. The rear end is screwed. This diamond core bit 2 is formed in a hollow shape, and a plurality of arc-shaped blade portions 1 are dispersively brazed and fixed to the tip thereof. Then, diamond powder is mixed in the blade portion 1. Next, as an example, the rotary shaft 18 of the punching machine 17 has an air introduction hole 19 on its outer periphery.
The air conduit 4 and the hollow portion of the diamond core bit 2 communicate with each other through the hole 19. Next, at least most of the air conduit 4 is made of a flexible hose, and the other end communicates with the air pressure source 3. Then, the steam mixing device 5 is located in the middle part. This air-water mixing device 5 uses water 10
Has a container 23 that is filled with water from the water supply plug 15,
The pipe 20 is inserted into the container 23. Then, a water droplet 11 is dropped from a water dropping portion 16 provided at the upper end of the air / water mixing device 5, and the water droplet 11 becomes mist 9 by the air 7 and is supplied to the diamond core bit 2. That is, the water in the container
Reference numeral 10 raises the pipe 20 and the lower portion of the water amount adjusting plunger 13 and drops the water from the upper end of the dropping portion 16. At this time, the water amount adjusting dial 14 adjusts the dropping amount of the water droplet 11 by moving the water amount adjusting plunger 13 up and down. The water 10 rises in the pipe 20 because a part of the compressed air 7 flows into the container through the communication hole 21 and the internal pressure thereof causes the water 10 to flow.
This is because the surface is pushed down. Next, the flow rate of the water droplets 11 in the water dripping portion 16 is, for example, 1.5 cc to 3 cc per minute for a diamond core bit of about 20 mm. The water droplet 11 becomes fog 9 by the air 7 and is supplied to the tip of the diamond core bit 2. Diamond core bit 2
Air and mist-like water supplied to the tip evaporate due to the heat generated during the perforation, and the blade 1 is cooled by the heat of evaporation.
Next, the air 7 flowing out of the blade portion 1 is guided to the dust collector 6 through the bellows 8. Then, the dust of the concrete is removed by the device 6. By doing so, the amount of water supplied to the diamond core bit 2 is extremely small,
It becomes about 1/30 to 1/50 per unit time in the past. Experiments have shown that even with such an extremely small amount of dropping, the tip of the diamond core bit 2 can be sufficiently cooled and the drilling work can be carried out smoothly. Moreover, the drilling speed was almost the same as the conventional drilling speed for supplying a large amount of cooling water. Further, since water did not enter the dust collector, the filter was not clogged and the dust collecting capability could be continuously maintained. At the same time, the concrete powder supplemented by the filter of the dust collector was kept in a dry state, and its discharge treatment was extremely easy.

〔The invention's effect〕

Since this device can mix mist-like water into the air flowing out from the tip of the diamond core bit 2, the mist-like water is evaporated at the concrete perforation part and the heat generated by the perforation is absorbed as evaporation heat. can do.
Therefore, the blade portion 1 can be cooled and the concrete drilling work can be easily performed. In addition, the water mixed in the air is formed into a mist and easily evaporates, so that there is no risk of polluting the periphery of the perforated portion with water. Therefore, it is possible to provide a device suitable for perforating a wall surface or a floor surface in a room where OA equipment or the like exists.

[Brief description of drawings]

FIG. 1 is an explanatory schematic diagram of this device, and FIG. 2 is a schematic diagram of performing a drilling operation using the same device. 1 ... Blade 2 ... Diamond core bit 3 ... Air pressure source 4 ... Air conduit 5 ... Air / water mixing device 6 ... Dust collector 7 ... Air, 8 ... Bellows 9 ... Fog, 10 …… Water 11 …… Water drop, 12 …… Filter 13 …… Water quantity adjusting plunger 14 …… Water quantity adjusting dial, 15 …… Water supply plug 16 …… Water dropping part, 17 …… Punching machine 18 …… Rotary shaft, 19 ...... hole 20 ...... pipe, 21 ...... communication hole 22 ...... wall surface, 23 ...... container

Claims (1)

(57) [Claims] 1. A diamond core bit 2 having a rear end portion made of a hollow body connected to a rotary drive source and having a blade portion 1 dispersedly at the tip end, and one end communicating with an air pressure source 3, and
An air conduit 4 having the other end communicating with the hollow portion of the bit 2 and an air conduit 4 interposed between the bit 2 and the air pressure source 3, and atomizing water into the air flowing through the air conduit 4. And an air-and-water mixing device 5 to be mixed. The air-and-water mixing device 5 has a water amount adjusting means for mixing the mist-like water into the air conduit 4, and the water amount adjusting means is A concrete perforation device configured to be adjustable so that the mist-like water evaporates due to heat generated by perforation of the bit 2 and the water does not flow out of the perforation.