JP2000316761A - Motor-driven dust collector and dust collecting sanding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To endure a long-term continuous operation without excessive burden due to the occurrence of clogging in a filter in a short time by separating most of dust by means of a cyclone before it arrives at a filter and storing it in a dust storing chamber. SOLUTION: Dust 10 is sucked into the cylindrical part 3a of a cyclone generating chamber 3 from a sucking port 7 together with an air stream 9. Dust 10 and the air stream 9 are revolved in a vortex state inside the cylindrical part 3a. Dust 10 is scattered in a peripheral direction by centrifugal force and separated from the air stream in the vortex. Separated dust 10 is moved downward along the inner wall surface of the cylindrical part 3a and the inner wall surface of a conical part 3b and goes down from the opening of a conical part end into a storing chamber 2. Therefore, most of sucked dust does not arrive at the filter 5 so that a motor is prevented from becoming out of order owing to the clogging of the filter 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction type electric dust collector and an electric dust collecting sander for collecting dust generated by polishing and adjusting a foundation under a sander when, for example, installing a ceiling or a wall.

[0002]

2. Description of the Related Art In the interior construction of buildings such as houses,
For example, a lot of dust is generated in a work such as applying a file to a ground surface for adjusting the ground surface before applying a wallpaper on a ceiling surface or a wall surface. Therefore, the worker sucked the dust with a vacuum cleaner or the like to clean it. However, the dust generated by such interior finishing is mainly putty powder generated by filing and polishing the convex part of the putty applied to the base wall surface, and a large amount of fine powder with a particle size of about 5 to 30 μm is generated. For this reason, recently, for example, a dedicated electric dust collector that is connected to an electric sander and that can perform an interlocking operation has been used in order to efficiently collect such a large amount of fine dust.

[0003] More specifically, this electric dust collector has a basic structure similar to that of a general vacuum cleaner, in which a sander (file device) is attached to a suction type electric dust collector via a hose. It is. Normally, the sander has a dust suction hole formed on the file surface so as to communicate with a hose extending from the dust collector, and dust generated while filing the file can be sucked into the electric dust collector through the dust suction hole, and the dust inside the device main body. To accommodate.

[0004] In such an electric dust collector, dust is sucked in from a suction port by an electric suction fan. However, the dust is collected and separated through a filter on the way, passes only the airflow, and is exhausted from an exhaust port. .

[0005]

However, even in the above-mentioned dedicated electric dust collector, there is a problem in the conventional model. That is, the dust airflow sucked into the dust collector main body directly hits the filter, and the filtering of the dust is performed exclusively by the filter, so that the filter becomes clogged with the fine dust within a very short time during use. I will.

If the dust collector continues to be driven in this clogged state, the load on the motor that drives the suction fan increases, generating heat, or a part of fine dust passes through the filter and enters the motor. However, there is a problem that the motor may fail and the device cannot withstand long-term continuous operation.

In order to avoid such a failure of the motor, it is necessary to frequently clean or replace the filter during the dust collection work, which is time-consuming and reduces the work efficiency.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to be able to continue an efficient dust collection operation, to prevent a filter from being clogged in a short time with dust contained in a sucked dust stream, and to adversely affect a motor. It is an object of the present invention to provide an electric dust collector or an electric dust collector which can withstand a long-term continuous operation with a small value.

[0009]

In order to achieve the above object, an electric dust collector according to the first aspect of the present invention is a portable electric dust collector for sucking dust generated from a sander, and sucks dust from a suction port. A cyclone forming chamber for converting a dust airflow into a vortex, a dust storage chamber for storing dust separated from the airflow in the cyclone forming chamber, and an electric suction fan connected to the cyclone forming chamber via a filter. is there.

According to a second aspect of the present invention, there is provided a dust collecting sander, a hose having a suction port disposed close to a file surface of the sander, and a portable device for sucking dust generated from the sander through the hose. Equipped with a type of electric dust collector,
The electric dust collector includes a cyclone forming chamber that converts a dust current sucked from a suction port through a hose into a vortex, a dust storage chamber that stores dust separated from the air current in the cyclone forming chamber, and a filter in the cyclone forming chamber. And a motor-driven suction fan connected thereto.

Further, the dust collecting sander according to the invention according to claim 3 is the dust collecting sander according to claim 2,
The sander is an electric sander, and is provided with an interlock so that the electric sander can be operated only while the electric dust collector is operating.

In the electric dust collector of the present invention, the dust collector is provided with a cyclone forming chamber for converting the dust current sucked from the suction port into a vortex, so that most of the dust is separated by the cyclone before reaching the filter.
It is stored in the dust storage room. Therefore, the filter is not clogged with dust in a short time as in the related art, and an excessive load is not applied to the motor, and the filter can withstand long-term continuous operation.

Further, in order to avoid the failure of the motor, it is not necessary to frequently clean or replace the filter during the dust collection work, and the work efficiency is improved by that much. In addition,
The limitation of dust collection work in this device is until the storage room is filled with dust, but since the volume of the storage room can be designed to be substantially sufficiently large in view of the amount of dust that must be collected in normal construction work. For example, it is easy to reduce the amount of dust accumulated in the storage chamber after one day of work.

The cyclone used in the dust collector of the present invention is one in which dust floating in the air stream is scattered in the circumferential direction by centrifugal force due to the difference in specific gravity by swirling the dust air stream, and separated. is there. The separated dust falls into the storage room and is stored.

As a specific configuration of the cyclone forming chamber, any configuration that can form a so-called cyclone can be used, but a simpler configuration is desirable. For example, this can be realized by a configuration in which the cyclone forming chamber has a conical shape having a cylindrical portion, and an airflow from the suction port is tangentially fed into the cylindrical portion and swirls.

In this case, since the dust separated by the centrifugal force can be collected from the conical end, a storage chamber may be provided below the conical end. Therefore, the suction fan is installed above the cylindrical portion of the cyclone forming chamber via the filter. That is, while the dust separated by the cyclone is stored in the lower storage chamber, the airflow is sucked upward,
After passing through the filter, the air can be exhausted from the exhaust port.

Further, in the dust collecting sander according to the present invention, the portable electric dust collector linked with the sander via a hose having a suction port arranged close to the file surface of the sander may include a hose. It is equipped with a cyclone forming chamber that converts the dust current sucked from the suction port into a vortex, so that dust generated by filing with a sander should be sucked from the suction port immediately after generation and sent to the electric dust collector. At the same time, the sucked dust flow is converted into a vortex in the cyclone forming chamber, and most of the dust is separated by the cyclone before reaching the filter, and can be stored in the dust storage chamber. Therefore, the filter does not become clogged with dust in a short time as in the past, and does not overload the motor, and can withstand long-term continuous operation as a portable electric dust collection sander. In addition, it is possible to further utilize the efficiency of the work of collecting dust while filing.

The sander connected to the electric dust collector via a hose is not limited to a manual sander, but may be an electric sander. In this case, by setting an interlock so that the electric sander can be operated only while the electric dust collector is operating, the file sanding by the electric sander is started in a state where the driving of the dust collector is forgotten. There is no need to disperse dust into the room and clean it again afterwards.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, an electric dust collector provided with a cyclone forming chamber having a substantially conical shape having a cylindrical portion is shown in a schematic sectional view of FIG. The electric dust collector of the present embodiment is portable, and can be carried or carried by an operator.

The electric dust collector according to the present embodiment has a storage chamber 2 for storing dust inside the main body 1 and a cyclone forming chamber 3 above the storage chamber 2.
The cyclone forming chamber 3 is composed of an upper cylindrical portion 3a and a lower conical portion 3b coaxial with the longitudinal central axis of the main body 1, and a distal end of the conical portion 3b opens into the lower accommodation chamber 2.

Above the cyclone forming chamber 3, a substantially conical hopper 4 is provided, and a filter 5 is mounted on the upper part of the hopper 4 over the opening surface thereof. The portion opens into the cyclone forming chamber 3. The hopper 4 is coaxial with the longitudinal center axis of the main body 1, so that the opening at the conical end of the hopper 4 is coaxial with the cylindrical portion 3a and the conical portion 3b.

A suction fan 6 driven by an electric motor M is provided at the uppermost portion in the main body 1. A filter 5 and a hopper 4 are interposed between the suction fan 6 and the cyclone forming chamber 3. I have.

In the center of the side wall of the main body 1, a suction port 7 communicating with the cyclone forming chamber 3 is provided.
An exhaust port 8 for discharging the airflow sucked by the suction fan 6 is provided in the upper part of the side wall of the air conditioner. When an electric dust collector is used, if a suction port such as a vacuum cleaner head is attached to the suction port 7 via a hose, the suction port is moved to a portion where dust is accumulated, and the suction port 7 is connected via a hose. Dust can be sucked into the cyclone forming chamber 3 from the inside.

The operation of dust collection by the electric dust collector having the above configuration is as follows. First, a detachable hose is attached to the suction port 7, a predetermined suction port is attached to the end of the hose, and the operator holds the hose or the suction port with one hand and turns on the drive switch of the motor M with the other hand. After
While carrying the main body 1, the suction port is positioned at the portion where the dust has accumulated.

The suction force of the suction fan 6 causes the dust 10
Is sucked from the suction port 7 through the suction port and the hose into the cylindrical portion 3a of the cyclone forming chamber 3 together with the airflow 9.
The dust currents (9, 10) sucked into the cylindrical portion 3a are:
It spirals in the cylindrical portion 3a. In this vortex, the dust 10 is scattered in the circumferential direction by centrifugal force and separated from the airflow 9. The separated dust 10 moves downward along the inner wall surface of the cylindrical portion 3a and the inner wall surface of the conical portion 3b, and falls into the accommodation chamber 2 from the opening at the end of the conical portion.

On the other hand, the air flow 9 in which the dust 10 is separated by the vortex
Is sucked upward along the central axis of the main body 1, passes through the opening of the hopper 4, and reaches the filter 5. The airflow 9 is filtered by the filter 5 while collecting a small amount of dust.
And reaches the suction fan 6 and is discharged from the exhaust port 8 to the outside of the main body 1.

With the continuation of the above operation, the dust 10 is collected and stored in the storage chamber 2. Most of the dust is separated from the sucked dust stream in the cyclone forming chamber 3 and stored in the storage chamber 2. Therefore, dust 10
There is no need to clean or replace the filter 5 during the dust collection work.

As shown in FIG. 2, when the electric sander 20 is attached to the suction port 7 of the electric dust collector shown in the above embodiment via the dedicated hose 11, the dust collecting work can be performed simultaneously while performing file polishing. , A portable dust collecting sander for performing the above can be configured.

In this dust collecting sander, a mechanism is provided near the file surface 21 so that dust immediately after generation can be quickly sucked. For example, the dust suction port 12 communicating with the hose 11 may be arranged near the file surface 21. At this time, in order to improve the dust absorbing performance, it is desirable to provide a rubber cover 13 or the like that forms a closed space around the file surface 21 by separating the filed polishing area from the external space.

The dust generated in the closed space in the cover 13 is immediately sucked from the dust suction port 12 through the hose 11 into the cyclone forming chamber 3 of the electric dust collector, where it becomes a vortex as described above, and is separated from the air current. Then, the airflow 9 falls into the storage chamber 2 and is stored therein, and only the airflow 9 reaches the filter 5, passes through the filter 5, and is discharged from the exhaust port 8 to the outside of the electric dust collector body 1.

It is easiest to operate such a dust collecting sander while the operator carries the main body 1 on his back. If this dust collecting sander is used, it is possible to efficiently collect dust generated simultaneously while performing the base adjustment polishing without stopping the work and cleaning or replacing the filter, so that the entire interior construction work can be performed. Time can be reduced. Further, even if the filter is not frequently cleaned or replaced, no clogging of the filter and no failure of the motor due to the clogging occur, so that the filter can be used as a dust collecting sander for a longer time than before.

Further, in this dust collecting sander, dust collecting work can be performed at the same time as the base adjustment polishing work. However, if the polishing work is performed by ignoring the operation of the dust collector and dust is scattered to the surroundings, the dust will be cleaned again later. Therefore, in order to avoid this, an interlock mechanism (two-dot chain line in the figure) 30 is assembled so that the electric sander 20 can be operated only while the electric dust collector is operating.

In the above-described embodiment, the device in which the electric sander is linked to the electric dust collector is shown. However, if the dust collector is provided near the file surface, a manual sander may be connected to the electric dust collector. I don't care.

[0034]

As described above, according to the electric dust collector according to the present invention, since the sucked dust hardly reaches the filter, it is not necessary to frequently clean or replace the filter during the dust collection operation. In addition, the filter can be prevented from being clogged and the motor can be prevented from malfunctioning, the dust collecting operation can be efficiently performed, and the device can be used for a long time.

Further, according to the dust collecting sander of the present invention, since most of the sucked dust is stored in the storage room without reaching the filter, the operation is stopped halfway and the filter is not cleaned or replaced. In addition, since dust collection work that occurs simultaneously while performing base adjustment polishing can be performed efficiently, the time required for the entire interior construction work can be reduced, and filter clogging and motor failure due to this can occur. Therefore, it can be used as a dust collecting sander for a longer time than before.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a schematic configuration of an electric dust collector according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a schematic configuration diagram of a dust collection sander as another embodiment of the present invention.

[Explanation of symbols]

 1: body 2: accommodation chamber 3: cyclone forming chamber 3a: cylindrical portion 3b: conical portion 4: hopper 5: filter 6: suction fan M, m: electric motor 7: suction port 8: exhaust port 9: air flow 10: dust 11: Hose 12: Dust suction port 13: Rubber cover 20: Electric sander 21: File surface 30: Interlock mechanism

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kanji Miyagi 4649 Shimo Aso, Takaoka City, Toyama Prefecture Inside Yayoi Chemical Industry Co., Ltd. (Reference) 3B062 AH02 AH05 3C047 HH13

Claims (3)

[Claims] 1. A portable electric dust collector for sucking dust generated from a sander, comprising: a cyclone forming chamber for converting a dust current sucked from a suction port into a vortex; a dust separated from the air current in the cyclone forming chamber. An electric dust collector, comprising: a dust storage chamber to be used; and an electric suction fan connected to the cyclone forming chamber via a filter. 2. A sander, a hose having a suction port arranged in proximity to a file surface of the sander, and a portable electric dust collector for sucking dust generated from the sander through the hose, wherein the electric dust collector comprises: A cyclone forming chamber for converting a dust air stream sucked from a suction port into a vortex through a hose, a dust accommodating chamber for accommodating dust separated from the air stream in the cyclone forming chamber, and a cyclone forming chamber connected via a filter. A dust collection sander comprising an electric suction fan. 3. The collection device according to claim 2, wherein the sander is an electric sander, and an interlock is provided so that the electric sander can be operated only while the electric dust collector is operating. Dust sander.