JP2008068373A - Dust collecting apparatus for dust sucking type polishing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust collecting apparatus which generates small noises, and hardly damages a dust collecting bag in a polishing operation. <P>SOLUTION: The dust collecting apparatus for a dust sucking type polishing device comprises: an outer case 21 having a suction hole 24 and discharge holes 25; an aspirator 22 attached to the suction hole 24 of the outer case so that a discharge port 26 is located inside the outer case 21, and that a blow port 27 and a suction port 28 are located outside the outer case; and a dust collecting bag 23 which is arranged inside the outer case, and is attached to the discharge port 26 of the aspirator so as to introduce the air flow inside from the aspirator 22. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dust collector used together with a dust-absorbing polishing tool.

  In car body repair shops, it becomes a dusty environment for polishing coatings, putty, primers, and the like. Dust from abrasive debris can be a health problem. Furthermore, dust is a cause of scumming during the painting operation. In order to reduce polishing residue floating in the vehicle body repair work place, a dust collector is usually used during the polishing operation.

  FIG. 1 is a schematic view showing a configuration of a general polishing / dust collecting apparatus. This polishing / dust collecting apparatus includes a dust-absorbing polishing tool 1, a dust hose 2, an aspirator 3, an air supply hose 4, and a dust collecting bag 5 having air permeability. When air is supplied to the air supply hose 4, the airflow is sent from the air supply port 6 of the aspirator 3 to the exhaust port 7, and as a result, negative pressure is generated at the intake port 8. By the action of this negative pressure, air is sucked from the dust suction hole of the dust suction polishing tool 1 through the dust hose 2.

  During the polishing operation, the polishing sheet 9 is mounted on the polishing surface of the dust-absorbing polishing tool 1 to generate polishing residue. The generated polishing residue passes through the dust hose 2 and the aspirator 3 together with the intake air from the dust suction hole, and is stored in the dust collection bag 5.

  Conventional polishing / dust collectors are noisy and create a poor working environment. Also, the dust bag is used in a state where it is placed on the floor without being exposed. For this reason, the bag is often torn and the polishing residue may pass through the dust collecting bag. Further, after the polishing operation using water, the floor is wet and the mesh of the dust bag may be clogged with water.

  The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a dust collecting device that is low in noise and hardly damages the dust collecting bag during the polishing operation.

The present invention includes an exterior box having an intake hole and an exhaust hole;
An aspirator attached to the air intake hole of the outer box so that the exhaust port is located inside the outer box and the air supply port and the air inlet are located outside the outer box;
A dust bag installed in the exterior box and attached to the exhaust port of the aspirator so that the airflow from the aspirator is introduced into the interior;
A dust collector for a dust-absorbing polishing tool is provided, and the above object is achieved thereby.

  The dust collector for a dust-absorbing polishing tool of the present invention has low noise, and the dust bag is hard to be damaged during polishing work. Further, when not in use, a polishing tool, a dust hose and the like can be stored in the outer box, which is convenient for storing and transporting the polishing tool.

  FIG. 2 is a schematic view showing an embodiment of the dust collecting device for a dust-absorbing polishing tool of the present invention. This dust collector for dust-absorbing polishing tool has an outer box 21, an aspirator 22, and a dust bag 23. The outer box 21 is made of a water-resistant material such as plastic or metal that is hard to some extent and strong against impact. The outer box 21 includes an intake hole 24 and an exhaust hole 25. An aspirator 22 is fixed to the intake hole 24. The exhaust port 26 of the aspirator 22 is located inside the exterior box, and the air supply port 27 and the intake port 28 are located outside the exterior box.

  The dust collection bag 23 is formed by forming a sheet-like material that has air permeability but does not allow polishing debris into a bag shape. Such a sheet material can be manufactured using cloth, paper or the like. The dust bag 23 is attached to the exhaust port 26 of the aspirator so that the airflow from the aspirator is introduced inside. The dust bag may be covered with an exhaust port of the aspirator and fixed with a clamp or the like. However, the attachment method is not particularly limited.

  When using this dust collector for dust-absorbing polishing tool, the cover of the outer box is closed and the cover is fixed so as not to open unexpectedly. A dust hose and a dust-absorbing polishing tool are connected to the intake port 28 of the aspirator. Air is supplied to the air supply port 27 of the aspirator while polishing. The airflow is sent to the exhaust port 26 of the aspirator, and is introduced into the dust bag 23 together with the polishing residue sucked by the intake port 28 of the aspirator. The dust bag 23 functions as a filter and allows air to pass through while holding the polishing residue inside. The air that has passed through the dust bag exits through the exhaust hole 25 of the outer box.

  In the dust collector for a dust-absorbing polishing tool, the exhaust port 26 of the aspirator is confined in the outer box 21, so that noise during operation is considerably smaller than that of a conventional dust collector.

  In order to further suppress noise, a silencer member may be provided in the outer box. FIG. 3 is a schematic view showing an aspect of the outer box having a sound deadening member (the aspirator and the dust bag are not shown).

An example of the sound deadening member is a layer of the sound absorbing material 31 installed in the outer box so as to surround the dust collection bag. A preferred sound-absorbing material is a non-woven fabric made of melt-blown microfibers having a fiber diameter of 1 to 4 micrometers and short fibers having a fiber diameter of 20 to 30 micrometers. The basis weight of the nonwoven fabric is 200 to 400 g / m ² , and the thickness is 40 mm or less, preferably about 10 to 30 mm. Such a nonwoven fabric is commercially available, for example, from Sumitomo 3M as the trade name “Thinsulate”.

  Another example of the sound deadening member is a silencer 32 attached to the exhaust hole of the outer box. A commercially available silencer may be used.

  In order to facilitate transportation, the outer box may be provided with transportation assisting means. FIG. 4 is a schematic view showing an embodiment of an outer box having a conveyance assisting means. Examples of the conveyance assist means include a handle 41 or a caster 42.

  The following examples further illustrate the present invention, but the present invention is not limited thereto.

Example 1
A polyethylene resin case having a length of 37 cm, a width of 20 cm, and a height of 18 cm was prepared as an outer case. “Simple dust collector 5560 for dust file” manufactured by Sumitomo 3M Co. was prepared as an aspirator and dust bag. Then, an intake hole and an exhaust hole were formed in the polyethylene resin case, and a dust collector having the configuration shown in FIG. 2 was assembled.

  A dust hose and a dust-absorbing polishing tool (“Dust Absorbing File Kit 5555” manufactured by Sumitomo 3M) were connected to the intake port of the aspirator. An air supply hose was connected to the air supply port of the aspirator, and air was sent from the air supply hose at an air pressure of 60 Pa. The generated noise was measured at a position 50 cm from the exhaust hole of the outer box. The measured value of the noise level was 86.8 dB.

Example 2
A nonwoven fabric “Thinsulate ^{(trade name)} SM-300L” (weight per unit area: 360 g / m ² , thickness: 21 mm) manufactured by Sumitomo 3M Co., Ltd. was prepared and cut into dimensions of 74 cm in length and 35 cm in width. The obtained non-woven mat was placed in an outer box so as to surround the dust bag. The noise during operation was measured in the same manner as in Example 1 except that this dust collector was used. The measured value of the noise level was 75.8 dB.

Comparative Example By removing the outer case from the dust collector of Example 1, a dust collector having the configuration shown in FIG. 1 was obtained. And the noise at the time of operation | movement was measured in the position (50 cm) from which the distance from the exhaust port of an aspirator becomes the same as an Example. The measured value of the noise level was 97.1 dB.

It is the schematic diagram which showed the structure of the general grinding | polishing / dust collecting apparatus. It is a schematic diagram which shows the one aspect | mode of the dust collector for dust-absorbing polishing tools of this invention. It is a schematic diagram which shows the one aspect | mode of the exterior box which has a silencing member. It is a schematic diagram which shows the one aspect | mode of the exterior box which has a conveyance assistance means.

Explanation of symbols

21 ... Exterior box,
22 ... Aspirator,
23 ... dust collection bag,
24 ... Intake hole,
25 ... exhaust holes,
26 ... exhaust port,
27 ... Air inlet,
28 ... Inlet,
31 ... Sound absorbing material.

Claims (5)

An outer box 21 having an intake hole 24 and an exhaust hole 25;
An aspirator 22 attached to the intake hole 24 of the exterior box such that the exhaust port 26 is located inside the exterior box 21 and the air supply port 27 and the intake port 28 are located outside the exterior box;
A dust collection bag 23 installed in the exterior box and attached to the exhaust port 26 of the aspirator so that the airflow from the aspirator 22 is introduced into the interior;
A dust collector for a dust-absorbing abrasive tool.   The dust collector for a dust-absorbing polishing tool according to claim 1, wherein the outer box (21) is made of plastic, and the dust bag (23) is made of cloth.   The dust collector for a dust-absorbing polishing tool according to claim 1, wherein the outer box has a layer of a sound absorbing material provided so as to surround the dust bag.   The dust collection for a dust-absorbing polishing tool according to claim 3, wherein the sound-absorbing material 31 is a nonwoven fabric made of melt-blown microfibers having a fiber diameter of 1 to 4 micrometers and short fibers having a fiber diameter of 20 to 30 micrometers. apparatus.   The dust collector for a dust-absorbing polishing tool according to claim 1, wherein the outer box (21) has at least one conveyance assist means selected from the group consisting of a handle and a caster.

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