JPH11245110A - Dust collection for drilling machine and apparatus thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the drilling efficiency of a dry type drilling method or a dry type drilling machine with simple remodeling. SOLUTION: A part of exhaust passing through the filter of a vacuum cleaner is circulated around a core drill cutting edge. A dust collecting hood 12 is fitted around the cutting edge, and dust-borne air 30 is sucked by the vacuum cleaner 20 with a fan F driven by a motor M2 through a conduit A13. Dust is separated by a cyclone effect and a filter 22 in a dust collecting box 21, and slightly pressurized air is exhausted from an exhaust opening 25, and a part of it is circulated through a conduit B14, passes through a swivel joint 4 again, and is sprayed over a core drill cutting edge 11 thereby conducting cooling and dust collecting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for collecting dust for a drilling machine, and more particularly to a method and an apparatus for collecting dust that significantly improve the efficiency of drilling of a drilling machine.

[0002]

2. Description of the Related Art Conventionally, a drilling device supplies water through a passage in a core drill drive shaft via a swivel joint for cooling the cutting edge and discharging cutting powder, and water is supplied to the cutting edge from the inside of the core drill. There were many things to supply. Although such a wet treatment has an excellent cooling effect, it requires appropriate equipment for the discharge treatment, and it is often difficult to adopt it depending on construction sites such as high places from the viewpoint of environmental pollution.

[0003] Therefore, some dry drills and dust collectors that do not use water are used, but these drills not only have insufficient cooling effect but also often have insufficient cutting powder removal action near the core drill bit. As a result, there is a problem that the perforation effect is extremely poor. Regarding this problem, in order to ensure the removal of cutting powder, a core drill with a spiral groove on the outer peripheral surface has been proposed. However, if the rotation speed of the core drill is not increased by the cutting load, the effect is still large. Insufficient and not completely resolved.

Accordingly, the present inventors have reviewed the conventional dust collecting method and apparatus, and as a result of intensive research, have found that the above problem can be solved by supplying exhaust air of a vacuum cleaner to the vicinity of the cutting edge of a core drill where cutting powder is generated. Knowing this, the present invention has been completed.

[0005]

OBJECTS OF THE INVENTION It is an object of the present invention to remarkably improve the drilling efficiency of a dry drilling method or a dry drilling apparatus.

Another object of the present invention is to continuously perform high-efficiency drilling work without the need for wastewater treatment.

It is still another object of the present invention to improve the drilling efficiency by a simple modification without special investment in equipment except for the exhaust pipe and the like.

[0008]

According to the present invention, there is provided a dust collecting method for a drilling machine in which dust-containing air is sucked by a vacuum cleaner from a dust collecting hood covering the periphery of a core drill blade and filtered and collected by a filter in the vacuum cleaner. A part of the pressurized air discharged from the filter after filtration is supplied from the inside to the cutting edge of the core drill through a passage in a core drill driving shaft of the drilling machine (claim 1). 2. The dust collecting method for a drilling machine according to claim 1, wherein the pressurized air supplied to the core drill blade is humidified air, a vacuum cleaner including a filter and a suction blower, and dust collecting covering the periphery of the core drill blade. In a dust collector for a drilling machine including a conduit A leading from a hood to an intake port of a vacuum cleaner and a conduit B connected to an exhaust port of the vacuum cleaner, a filter after filtration supplied from a conduit B is supplied. Part of compressed air A dust collector for a drilling machine characterized by being supplied from the inside to a cutting edge of a core drill through a passage in a core drill driving shaft of the drilling machine. Claim 3
The dust collecting apparatus for a drilling machine according to claim 4 (claim 4) and the filter for a drilling machine according to claim 4 wherein the filter is a wet filter (claim 5) are provided.

Hereinafter, the present invention will be described in detail with reference to examples.

[0010]

FIG. 1 is a conceptual diagram of an embodiment of the present invention.

In FIG. 1, 1 is a drilling machine, 2 is a base, 3
The struts, the Sui Vel joint 4, the slide block 5, 5A pinion shaft, 5B lever, 5C grasps ball, _{M 1} is the motor, 6 the rack, 7 gearbox, 8
Is a bearing, 9 is a seal, 10 is a core drill, 11 is a core drill cutting edge, 12 is a dust collecting hood, 13 is a conduit A, 1
4 conduit B (reflux condenser), 20 vacuum cleaner 21 is dirt container, 22 a filter, F is a fan, _{M 2} denotes a motor, 23
Is a baffle plate, 25 is an exhaust port, 27 is a relief valve, 3
0 is dust-containing air, 31 is pressurized air, 32 is exhaust, 10
1 is dust.

[0012] In FIG. 1, a drilling machine 1 core drill perforating machine with gearbox which is vertically adjustably supported by the motor M ₁ drives via a slide block 5 in a trapezoidal with column 3, conventionally the bearing 5 Water is supplied from the inside of the core drill for cooling and washing to the cutting edge through a swivel joint 4 having seals 9 and 9. However, as described above, drills using water often cannot be used in terms of water supply, wastewater treatment, and the like, and are difficult to use. Therefore, improvement of dry drills is required.

[0013] The present inventors have a dust collecting hood 12 is provided on the near edge, the dust-containing air 30 sucked by a vacuum cleaner 20 provided with a fan F driven by a motor M ₂ via a conduit A13, In the dust collecting box 21, not only the dust is separated by the cyclone effect and the filter 22, but also the weakly pressurized air is exhausted from the exhaust port 25, and a part of the air is returned through the conduit B14 to return to the switch. Cooling and dust collection were performed by spraying the core drill tip 11 through the bell joint 4. This is extremely important in the present invention.

In this case, the optimum condition of the ratio between the recirculated air and the exhaust gas can be selected by a valve (or damper) 27. Further, the outlet of the dust 30 in the upper left portion of the dust collection box 21 is squeezed to give a slight Venturi effect to increase the flow velocity, to perform the inertial separation of the dust having a high specific gravity by the cyclone effect without significantly reducing the total flow rate, and a filter. The dust collecting effect can be improved by disposing a baffle plate 23 as needed between the baffle plate 22. In addition, a small amount of water can be sprayed on the bottom of the dust collecting box 21 or a filter such as water or oil can be immersed in the filter 22 itself to form a wet filter, thereby separating and collecting fine dust.

By doing so, it is possible to add a slight humidity to the recirculated pressurized air 31 to make it humidified air, which is effective for cooling the cutting edge of the core drill. However, if the humidity is too high, the dust tends to harden, and the perforation efficiency may be reduced, so care must be taken. Since the temperature of the dust-containing air 30 is at most room temperature to about 60 ° C., it goes without saying that various bag filters are used.

[0016]

According to the present invention, all of the above objects can be attained.

That is, the drilling efficiency of the dry drilling method or the dry drilling apparatus is remarkably improved. In addition, high efficiency drilling work can be continuously performed without the need for wastewater treatment and no concern about environmental pollution.

Further, the drilling efficiency in dry drilling can be improved by simple remodeling without special capital investment.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Drilling machine 2 Base part 3 Support 4 Swivel joint 5 Slide block 5A Pinion shaft 5B Lever 5C Handle ball M ₁ Motor 6 Rack 7 Gear box 8 Bearing 9 Seal 10 Core drill 11 Core drill blade 12 Dust collecting hood 13 Duct A 14 Duct B (reflux condenser) 20 the vacuum cleaner 21 dirt container 22 filters F fan M ₂ motor 23 buckle plate 25 outlet 27 relief valve 30 dust-laden air 31 pressurized air 32 exhaust 101 dust

Claims (5)

[Claims] In a dust collecting method for a drilling machine, dust-containing air is sucked by a vacuum cleaner from a dust collecting hood covering a periphery of a core drill blade and filtered and collected by a filter in the vacuum cleaner, and is discharged from the vacuum cleaner. A dust collecting method for a drilling machine, characterized in that a part of the pressurized air after filtration is supplied from the inside to the cutting edge of the core drill through a passage in a core drill driving shaft of the drilling machine. 2. The dust collecting method for a drilling machine according to claim 1, wherein the pressurized air supplied to the cutting edge of the core drill is humidified air. 3. A vacuum cleaner having a filter and a suction blower, a conduit A leading from a dust collecting hood covering the periphery of a core drill blade to an inlet of the vacuum cleaner, and a conduit B connected to an exhaust port of the vacuum cleaner. In the dust collecting apparatus for a drilling machine, a part of the pressurized air supplied from the pipe B after the filter filtration is supplied from the inside to the cutting edge of the core drill through the passage in the core drill driving shaft of the drilling machine. Dust collector for drilling machine. 4. The dust collector for a drilling machine according to claim 3, wherein the pressurized air supplied to the cutting edge of the core drill is humidified air. 5. The dust collector according to claim 4, wherein the filter is a wet filter.