JPH056061Y2 - - Google Patents

Description

[Detailed description of the invention] <<Industrial application>> This invention relates to a device for preventing the scattering of dust generated when grinding concrete or mortar walls or floors of buildings with a grinding machine such as a sander. It is.

《Conventional technology》 Traditionally, when grinding the old paint film or polishing the surface of exposed concrete during renovation work on the exterior of a building, dust is scattered, causing not only a nuisance to the neighborhood but also a health problem for the workers. It was hot. For this reason, in the past, a vacuum cleaner was attached to the grinder and the dust generated by the grinder was captured by the filter of the vacuum cleaner, or as disclosed in Japanese Utility Model Application No. 54-8791. The generated dust is introduced into a centrifugal dust collector using a blower, relatively coarse dust is centrifuged and falls downward, and other fine dust is captured by a filter. It has become publicly known.

《Problems to be solved by the invention》 However, with vacuum cleaners, both fine dust and coarse dust are captured by the filter, so the filter gets clogged quickly, and the filter has to be replaced frequently. There is an inconvenience that it has to be replaced.

On the other hand, centrifugal dust collectors capture coarse dust and fine dust separately, so the frequency of filter replacement can be reduced compared to vacuum cleaners, but grinders such as sanders that grind the surface of concrete Since most of the dust generated when using a filter is fine powder, it is difficult to centrifuge it, and most of it is captured by the filter, which can clog relatively quickly. I couldn't solve the problem I mentioned.

This invention was created in view of the above problems, and its purpose is to effectively remove fine dust by attaching it to a grinding machine such as a sander that grinds walls or floors made of concrete or mortar. death,
To provide a dust scattering prevention device for a grinding machine that can significantly reduce the frequency of filter replacement.

<Means for Solving the Problems> In order to achieve the above object, in the dust scattering prevention device for a grinding machine according to the present invention, a dustproof cover that covers the grinding surface is attached to a grinding machine such as a sander. The upper part of the cover is connected to the intake side of the blower through a first hose, the exhaust side of the blower is connected to the suction port of the dust collector through a second hose, and the inside of the dust collector is adjacent to the suction port. a first windshield wall that guides intake air downward; a water tank is provided below the windshield wall; and a plurality of perforated dust collecting plates are rotatably disposed above the water tank; A second windshield wall having an open upper end and a closed lower end is provided in the dust collector adjacent to the discharge port of the dust collector, and the discharge port is communicated with the vacuum cleaner via a third hose, and the grinder The dust from the water is removed by hitting the water surface of the water tank in the dust collector, the unremoved dust is collected by the perforated plate, and the remaining dust is further captured by the vacuum cleaner. It will become.

<<Operation>> The dust generated by the grinder is introduced into the dust collector by the blower, and then guided by the windshield wall and thrown onto the water surface of the water tank. As a result, coarse dust falls into the water and is captured, and most of the fine dust also comes into contact with the water surface and is captured. On the other hand, since most of the dust that is not captured in the water tank contains moisture, when it comes into contact with the perforated plate above it, it is adsorbed and captured by this. The dust that is not captured by these water tanks and perforated plates is
Finally, it is captured and removed by a vacuum cleaner.

<<Example>> A dust scattering prevention device according to a preferred embodiment of the present invention will be described below.

In the figure, 1 indicates a grinding machine called a sander, and a disc 20 with sandpaper attached to the lower part of this grinding machine 1 is rotated by an electric motor (not shown). It is supported by Locknut 21. A pot-shaped dustproof cover 3 is attached to the grinding machine 1 above a disc 20 by bolts and nuts, and brush-like bristles 2 are attached to the lower peripheral edge of the dustproof cover 3. Dust cover 3
A through hole is formed in a part of the peripheral wall of the hose, and one end of a flexible first hose 4a is connected to this through hole. The other end of the first hose 4a is connected to the intake side of the blower 5, while the exhaust side of the blower 5 is connected to the inlet of the dust collector 10 by a flexible second hose 4b. There is.

As shown in FIG. 2, this dust collector 10 is provided with a windshield wall 11 facing toward the inside thereof. One of the windshield walls 11 is attached opposite to the suction port, and has a structure in which its upper end is closed and its lower end is open. The other windshield wall 11 is attached to face the discharge port of the dust collector 10, and has a structure in which its upper end is open and its lower end is closed. Both windbreak walls 11-
A dust receiving box 8 consisting of a water tank is provided below 11, and six perforated plates 14 are radially attached to the rotating shaft 12 between both windshield walls 11-11 and above the water tank. One end is supported by a bearing 13, and the other end projects outward from the dust collector 10, to which a handle 7 is attached. Further, the top surface of the dust collector 10 is covered with a lid 6.

One end of a third flexible hose 4c is connected to the discharge port of the dust collector 10, and the other end of this hose is connected to a known vacuum cleaner 16.

When using the above-mentioned apparatus, first, the power of the grinder 1, blower 5, and vacuum cleaner 16 is turned on and driven, and then the grinder 1 performs grinding work on a predetermined floor surface or the like. At this time, the dust generated during the grinding work is trapped inside by the dust cover and the brush-like bristles 2, and then is passed from the first hose 4a to the second hose 4b by the blower 5 to the dust collector 1.
Forced to within 0. Dust that enters the inside of the dust collector 10 from the suction port is deflected downward by the windshield wall and hits the water surface of the water tank, and much of the dust is captured by the water in the water tank.
Dust not captured by the water tank floats above it and is captured by the radially arranged perforated plates 14. Preferably, this perforated plate 14
The purpose of this method is to impregnate water with water to improve the adhesion of dust. Fine dust that is not captured by the perforated plate 14 is discharged from the discharge port of the dust collector 10 and passes through the third hose 4c to the vacuum cleaner 1.
Finally captured by 6. Above, dust collector 1
When a large amount of dust adheres to the perforated plate 14 of 0,
All you have to do is turn the handle exposed outside to let the dust fall into the water tank, and then discard the water in the tank along with the dust as appropriate.

<<Effects>> As described above, according to the dust scattering prevention device for a grinding machine according to the present invention, the dust generated by grinding is surrounded by the dustproof cover attached to the grinding machine, and the dust is removed through the blower and hose. Since the dust is completely captured by the dust collector 10 and the vacuum cleaner 16, the dust will not be scattered around and harm the health of the workers. In addition, the dust that enters the dust collector is first hit on the water surface of the water tank below, so coarse dust falls into the gray water and is captured in the tank, and most of the fine dust comes into contact with the water surface and is captured. be done. Further, most of the dust that is not captured by the water tank is adsorbed and captured by the plurality of perforated plates above the water tank, which contain water, when they come into contact with the same. And since only a small portion of the dust that is not captured by these leaves the dust collector and is captured by the vacuum cleaner,
Dust is captured in three stages: a water tank, a perforated plate, and a vacuum cleaner, which slows down the clogging of filters used in vacuum cleaners and greatly reduces the frequency of filter replacement.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a dust scattering prevention device for a grinding machine according to the present invention, Fig. 2 is a partially cutaway perspective view showing the inside of the dust collector shown in Fig. 1, and Fig. 3 is a perspective view of the grinding machine. It is an exploded perspective view. 1...Grinding machine, 2...Brush-like bristles, 3...Dust-proof cover, 4a, 4b, 4c...Hose, 5...Blower, 6...Lid, 7...Handle, 8...Dust receiving box, 10...dust collector, 11...windshield wall, 14...
...Perforated plate.

Claims (1)

[Scope of utility model registration request] A dustproof cover that covers the grinding surface is attached to a grinding machine such as a sander, the upper part of the dustproof cover is connected to the intake side of the blower through a first hose, and the exhaust side of the blower is connected to the second hose. A first windshield wall is installed in the dust collector adjacent to the suction port to guide the intake air downward, and a water tank is provided below the windshield wall. A plurality of perforated dust collecting plates are rotatably disposed above the dust collector, and a second windshield wall with an open upper end and a closed lower end is provided in the dust collector adjacent to the discharge port of the dust collector. The discharge port is communicated with a vacuum cleaner through a third hose, and the dust from the grinder is removed by hitting the water surface of the water tank in the dust collector, and the unremoved dust is removed by the perforated plate. A dust scattering prevention device for a grinding machine, which collects dust and further captures the remaining dust with the vacuum cleaner.