JP4652202B2 - Dust collection container for electric tools - Google Patents

Description

  The present invention relates to a dust collection container for an electric tool connected to a discharge nozzle of the electric tool in order to collect dust collected by a power tool such as a belt sander, a circular saw, or a groove.

Conventionally, various dust collectors are known.
For example, the dust collector of Patent Document 1 is a cylinder part attached to the discharge nozzle of the electric tool to collect the processing powder rolled up by the electric tool, and a dust bag nozzle provided at the tip of the cylinder part, It has a cloth dust bag attached to the dust bag nozzle. An intermediate nozzle is provided in the dust bag nozzle, and the processing powder is discharged together with air to the upper surface of the dust bag by the intermediate nozzle. Therefore, the processed powder hits the upper surface of the dust bag and is then stored in the lower portion of the dust bag. Therefore, it is the structure which can suppress the clogging by the processing powder of a dust bag.
Japanese Patent Laid-Open No. 9-254033

However, although the dust collector of Patent Document 1 has an intermediate nozzle, in the end, the processing powder and air are separated by the texture of the dust bag. For this reason, there remains a problem that the processing powder gradually clogs the dust bag and the dust collection efficiency gradually decreases.
Moreover, the dust collector attached to the electric tool may be inclined depending on the posture of the electric tool, and the dust collector held by the operator may be inclined depending on the posture of the operator. Therefore, it is desired that the dust collector does not decrease the dust collection efficiency even when tilted.
Therefore, the present invention has an object to provide a dust collection container for an electric tool that can collect the processing powder wound up by the electric tool without using a dust bag and that does not lower the dust collection efficiency even if the posture is changed. And

In order to solve the above-mentioned problems, the present invention is a portable dust collecting container or a dust collecting container having a configuration as described in each claim.
According to invention of Claim 1, in order to collect the processing powder wound up with the electric tool, it is a dust collection container of the electric tool pipe-connected to the discharge nozzle of the electric tool, and the discharge nozzle and the pipe connection An inlet passage portion, a cyclone unit connected to the inlet passage portion by piping, and a dust collection box for storing machining powder discharged from the cyclone unit. The cyclone unit consists of a cyclone body that rotates and drops the processing powder sent along with air from the inlet passage side along the wall surface, and a process that discharges the processing powder toward the dust collection box below the cyclone body. It has a powder outlet and an exhaust outlet for exhausting air above the cyclone body. The cyclone body is tiltably attached to an exhaust passage port formed in the inlet passage portion, and the cyclone body tilts around the exhaust passage port due to gravity so that the cyclone body is in a predetermined angle state with respect to the ground. Tilt to maintain.

Therefore, the dust collecting container is not configured to separate the processing powder wound up by the electric tool by the cloth of the dust bag. That is, the processing powder wound up by the electric tool is sent to the cyclone unit, separated from the air using the centrifugal force generated in the cyclone unit, and discharged to the dust collection box. Therefore, there is no problem that the dust collection ability is lowered by clogging the processed powder into the dust bag as in the conventional case.
Moreover, when the entrance passage portion is inclined with respect to the ground, the cyclone body is inclined with respect to the entrance passage portion due to gravity and maintained at a predetermined angle with respect to the ground. For example, even when the entrance passage portion is inclined with respect to the ground due to the posture of the electric tool or the posture of the operator, the cyclone body is always maintained at a predetermined angle with respect to the ground.
Further, since the cyclone body tilts around the exhaust passage port of the inlet passage portion, the positions of the processing powder and air blown from the inlet passage portion to the cyclone body do not change. Therefore, even if the entrance passage portion is inclined, the cyclone body does not change the inclination of the cyclone body with respect to the ground and the blowing position. As a result, the cyclone body can always stably separate the processing powder and air, and the dust collection efficiency does not decrease even if the posture of the dust collection container changes.

According to the invention described in claim 2, the exhaust passage port of the inlet passage portion and the intake port provided in the cyclone main body are rotatably attached.
Accordingly, the cyclone main body tilts with respect to the inlet passage portion around the intake port.

According to the invention described in claim 3, the intake port member is provided between the inlet passage portion and the discharge nozzle. The intake port member is connected to a spherical spherical mounting portion rotatably attached to the inlet passage portion, and a discharge nozzle or a connection pipe connected to the discharge nozzle at one end through the spherical mounting portion. The intake port member is attached to the inlet passage portion so as to be rotatable about the cylindrical portion and tiltable about the spherical mounting portion.
Therefore, the container main body of the dust collecting container can be rotated and tilted with respect to the discharge nozzle or the connecting pipe connected to the discharge nozzle by the intake port member. Therefore, the dust collection container has a high degree of freedom in operation when it is carried.

According to the fourth aspect of the present invention, the portable holding portion for carrying the container body including the inlet passage portion, the cyclone unit, and the dust collection box is attached to the container body, and the portable holding portion is Or it has the band, the string, or the chain which can be hung on the waist.
Therefore, the container body can be carried by a band or the like.

According to the fifth aspect of the present invention, the dust collection box has an opening and a scattering prevention curtain that covers the opening. In the anti-scattering curtain, a lower end portion of the cyclone main body is inserted, and a notch that allows the cyclone main body to tilt is formed by allowing the lower end portion to move.
Therefore, the processing powder discharged into the dust collection box from the lower end of the cyclone main body can be prevented from being scattered from the opening by the scattering prevention curtain.

An embodiment of the present invention will be described with reference to FIGS.
The dust collecting container 1 is a container for collecting the processing powder rolled up by the electric tool, and is connected to an electric tool such as a belt sander 10 by piping as shown in FIG.
The belt sander 10 includes a housing 11, an electric motor 13 provided in the housing 11, a sanding belt 12 that rotates by the power of the electric motor 13, and a discharge nozzle 14 provided in the housing (tool body) 11. ing.

As shown in FIG. 1, the discharge nozzle 14 has a cylindrical shape, and is scraped by the sanding belt 12 and discharges the processing powder (dust) wound up by the sanding belt 12 to the upper and rear sides together with air.
A connecting pipe 15 is detachably connected to the discharge nozzle 14.
The connecting pipe (hose) 15 has a deformable bellows portion 15a and attachment portions 15b and 15c provided at both ends of the bellows portion 15a, and connects the belt sander 10 and the dust collecting container 1 by piping. .

  As shown in FIG. 2, the dust collecting container 1 has a container body integrally including an inlet passage portion 2, a cyclone unit 3, and a dust collecting box 4 in order to separate the air wound up by the belt sander 10 and the processed powder. Have. And the portable holding | maintenance part 22 is attached to the container main body.

The inlet passage portion 2 is hollow as shown in FIGS. 3 and 4, and has a dust collection chamber 2a and an intake port 2b and an exhaust passage port 2d for opening the dust collection chamber 2a.
As shown in FIGS. 3 and 4, the air inlet 2 b is formed at one end in the longitudinal direction of the inlet passage 2. An intake port member 5 is rotatably attached to the intake port 2b.

As illustrated in FIGS. 3 and 4, the intake port member 5 integrally includes a spherical mounting portion 5 b and a cylindrical body portion 5 a.
The spherical attachment portion 5b is spherical and is rotatably attached to a holding portion 2c that is recessed in the inlet passage portion 2.
The cylindrical part 5a penetrates the spherical mounting part 5b, one end projects from the inlet passage part 2, and a connecting pipe 15 is connected to the one end by piping (see FIG. 1).
Accordingly, the intake port member 5 rotates 360 ° about the cylindrical body portion 5a as an axis, and also tilts about the spherical mounting portion 5b.

As shown in FIGS. 3 and 4, a direction regulating member 6 is attached to the cylindrical body 5 a on the dust collection chamber 2 a side.
The direction regulating member 6 has a vertically-divided cylindrical shape, and extends to the center of the dust collecting chamber 2a along the lower surface of the cylindrical portion 5a and opens the upper portion. Therefore, the direction of the blown air is regulated by the direction regulating member 6.

As shown in FIG. 4, the exhaust passage port 2 d of the inlet passage portion 2 is formed near the upper portion of the side wall surface of the inlet passage portion 2.
The exhaust passage port 2d has a large diameter portion 2d1, a bottom portion 2d3, and a small diameter portion 2d2. The large diameter portion 2d1 extends in a cylindrical shape from the outer wall surface of the inlet passage portion 2 toward the dust collection chamber 2a. The bottom 2d3 is formed in an annular shape along the inner peripheral edge of the large-diameter portion 2d1 on the side of the dust collection chamber 2a. The small-diameter portion 2d2 has a diameter smaller than that of the large-diameter portion 2d1, and extends from the inner peripheral edge of the bottom portion 2d3 to the dust collection chamber 2a side in a vertically split half.

A cyclone unit 3 is attached to the exhaust passage port 2d via a bearing 7 so as to be tiltable.
As shown in FIG. 4, the bearing 7 is a rolling bearing and is provided in the large-diameter portion 2d1 of the exhaust passage port 2d. The outer peripheral part of the bearing 7 is attached to the inner peripheral surface of the large diameter part 2d1. An intake port 3a1 of the cyclone unit 3 is fitted in the inner peripheral portion of the bearing 7, and the intake port 3a1 has substantially the same diameter as the small diameter portion 2d2 of the exhaust passage port 2d.

The cyclone unit 3 includes a cyclone body 3a, a lid member 3b, and an exhaust port member 3c as shown in FIGS.
The cyclone main body 3a has a cylindrical shape and has an intake port 3a1 on the upper side of the side surface.
As shown in FIGS. 3 and 4, the air inlet 3 a 1 is eccentric from the axial center of the cyclone main body 3 a and protrudes in a cylindrical shape from the side surface of the cyclone main body 3 a toward the inlet passage portion 2. The intake port 3a1 is connected to the exhaust passage port 2d of the inlet passage portion 2 through a bearing 7 so as to be rotatable.

As shown in FIG. 3, the lower half of the cyclone main body 3a is tapered, and a machining powder discharge port 3a2 is formed at the tip.
The lower end portion of the cyclone main body 3a is embedded in the dust collection box 4, and an annular weight 3d is attached to the outer peripheral surface thereof. For this reason, the cyclone body 3a has a center of gravity positioned below the cyclone body 3a due to its own weight and the weight of the weight 3d.

As shown in FIG. 3, the lid member 3b has a donut disk-like lid portion 3b1 attached to the upper portion of the cyclone main body 3a, and a cylindrical tube portion 3b2 extending downward from the inner periphery of the lid portion 3b1. Yes.
The tube portion 3b2 extends to the approximate center of the height of the cyclone body 3a at the center of the axis of the cyclone body 3a. An exhaust port 3b3 is formed in the upper part of the pipe portion 3b2. An exhaust port member 3c is attached to the exhaust port 3b3.
The exhaust port member 3c extends upward from the exhaust port 3b3 and is bent backward in the middle. Therefore, air is exhausted backward by the exhaust port member 3c.

As shown in FIGS. 3 and 4, the dust collection box 4 is provided on the side surface of the inlet passage portion 2, and is disposed below the cyclone unit 3.
The dust collection box 4 is hollow and has a dust collection chamber 4a and an opening 4b.
The opening 4 b is formed in a long hole shape on the upper surface of the dust collection box 4 and extends in the longitudinal direction of the dust collection container 1. Therefore, the cyclone body 3a can tilt in the front-rear direction (left-right direction in FIG. 3) along the opening 4b.

As shown in FIGS. 3 and 4, the dust collection box 4 is provided with a rubber scattering prevention curtain 8 that covers the opening 4 b.
The anti-scattering curtain 8 has a longitudinal cut (cut) 8a extending in the longitudinal direction and a plurality of horizontal cuts (cuts) 8b extending in the short direction. The lower end portion of the cyclone main body 3 a is fitted into the scattering prevention curtain 8. Therefore, the processing powder in the dust collection box 4 is prevented from being scattered from the opening 4b by the scattering prevention curtain 8. The cyclone main body 3a is allowed to tilt in the front-rear direction by the vertical cut 8a and the horizontal cut 8b.

As shown in FIG. 3, a bottom cover 9 is attached to the lower part of the inlet passage 2 and the dust collection box 4.
The bottom cover 9 is configured to cover an opening formed in the lower surface portion of the inlet passage portion 2 and an opening formed in the lower surface portion of the dust collection box 4. At the front end portion of the bottom lid 9, a rotation attachment portion 9a that is rotatably attached to the lower portion of the entrance passage portion 2 is formed. A locking portion that is releasably locked by a locking lever (not shown) provided on the rear surface of the inlet passage portion 2 is formed at the rear end portion of the bottom lid 9.

The container main body of the dust collecting container 1 is provided with two attachment parts 20 and 21 for attaching the portable holding part 22 as shown in FIG.
The portable holding part 22 has a band 22a that can be hung on the shoulder or waist. Locking portions 22b and 22c that are detachably attached to the attachment portions 20 and 21 are provided at both ends of the band 22a. In the center of the band 22a, an adjusting unit 22d for adjusting the length of the band 22a is provided. Therefore, the container body can be carried by the operator by the portable holding part 22.

Next, the dust collecting action of the dust collecting container 1 will be described.
When the workpiece is processed by the belt sander 10, the processing powder is generated from the workpiece by the sanding belt 12 of the belt sander 10 (see FIG. 1). Then, the processing powder is wound up by the rotational force of the sanding belt 12 and discharged from the discharge nozzle 14 together with air.

The processing powder and air discharged from the discharge nozzle 14 are blown into the inlet passage portion 2 of the dust collecting container 1 through the connecting pipe 15.
Of the processing powder and air blown into the inlet passage portion 2, only relatively large processing powder falls due to its own weight and is stored in the inlet passage portion 2. The small processing powder that has not fallen is blown into the cyclone unit 3 through the exhaust passage port 2d together with air.

The processing powder and air blown into the cyclone unit 3 rotate along the wall surface of the cyclone main body 3a (see FIG. 4), and the processing powder and air are separated by centrifugal force. Then, the processing powder gradually falls due to gravity, and is discharged to the dust collection box 4 through the processing powder discharge port 3a2. Then, the air is exhausted above the cyclone unit 3 through the pipe portion 3b2.
Therefore, the machining powder is separated from the air by the inlet passage portion 2 and the cyclone unit 3 and is stored in the inlet passage portion 2 and the dust collection box 4.

  As described above, the dust collecting container 1 is portable by an operator using the portable holding unit 22. Therefore, when the worker bends over, the dust collecting container 1 is inclined with respect to the ground. At that time, as shown in FIG. 3, the cyclone unit 3 is tilted with respect to the entrance passage portion 2 by its own weight and the weight of the weight 3d, and always has a predetermined angle state (substantially vertical state, suitable state) with respect to the ground. ) Is maintained. Accordingly, the cyclone unit 3 is always maintained in a predetermined angle state substantially perpendicular to the ground even when the entrance passage portion 2 and the like are inclined with respect to the ground.

The embodiment is configured as described above.
That is, the dust collection container 1 is integrally provided with an inlet passage portion 2, a cyclone unit 3, and a dust collection box 4 as shown in FIG. The cyclone unit 3 is processed toward the dust collection box 4 below the cyclone body 3a that rotates and drops the processing powder sent together with air from the inlet passage section 2 side along the wall surface. A processing powder discharge port 3a2 for discharging powder and an exhaust port 3b3 for discharging air above the cyclone main body 3a are provided. The cyclone body 3a is attached to an exhaust passage port 2d formed in the inlet passage portion 2 so as to be tiltable. The cyclone body 3a is tilted about the exhaust passage port 2d by gravity, and the cyclone body 3a is brought to the ground. In contrast, it is tilted so as to maintain a predetermined angle state.

Accordingly, the dust collecting container 1 is not configured to separate the processing powder wound up by the electric tool by the texture of the dust bag. That is, the processing powder wound up by the electric tool is sent to the cyclone unit 3, separated from the air by using the centrifugal force generated in the cyclone unit 3, and discharged to the dust collection box 4. Therefore, there is no problem that the dust collection ability is lowered by clogging the processed powder into the dust bag as in the conventional case.
In addition, when the entrance passage portion 2 is inclined with respect to the ground due to the posture of the operator or the like, the cyclone body 3a is inclined with respect to the entrance passage portion 2 due to gravity and maintained at a predetermined angle with respect to the ground.
Further, since the cyclone main body 3a tilts around the exhaust passage port 2d of the inlet passage portion 2, the positions of the processing powder and air blown from the inlet passage portion 2 into the cyclone main body 3a do not change. Therefore, even if the inlet passage 2 is inclined, the inclination and the blowing position of the cyclone main body 3a with respect to the ground do not change. As a result, the cyclone main body 3a can always stably separate the processing powder and air, and the dust collection efficiency does not decrease even if the posture of the dust collection container 1 is changed.

Further, as shown in FIG. 4, an exhaust passage port 2 d of the inlet passage portion 2 and an intake port 3 a 1 of the cyclone main body 3 a are rotatably attached via a bearing 7.
Therefore, the cyclone body 3 a can be easily tilted with respect to the inlet passage portion 2 by the bearing 7.

As shown in FIGS. 1 and 3, an intake port member 5 is provided between the inlet passage portion 2 and the connecting pipe 15. The intake port member 5 has a spherical mounting portion 5b and a cylindrical body portion 5a. The inlet member 5 can be rotated about the cylindrical body portion 5a with respect to the inlet passage portion 2 and can be tilted about the spherical mounting portion 5b. Installed on.
Therefore, the container body of the dust collecting container 1 can be rotated with respect to the connecting pipe 15 and tilted by the intake port member 5. Therefore, the dust collection container 1 has a high degree of freedom in operation when carried.

Moreover, the portable holding | maintenance part 22 has the band 22a which can be hung on a shoulder or a waist, as shown in FIG.
Therefore, the container body of the dust collecting container 1 can be carried by the band 22a.

Moreover, the dust collection box 4 has the opening part 4b and the scattering prevention curtain 8 which covers the opening part 4b, as shown in FIG. In the anti-scattering curtain 8, a lower end portion of the cyclone main body 3a is inserted, and a notch (8a, 8b) that allows the cyclone main body 3a to tilt by allowing the lower end portion to move is formed.
Therefore, the processing powder discharged from the lower end portion of the cyclone main body 3a into the dust collection box can be prevented from being scattered from the opening 4b by the scattering prevention curtain 8.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and may be the following form.
(1) That is, the dust collecting container 1 according to the above-described embodiment has a dust collecting chamber for storing processed powder in the inlet passage portion 2 as shown in FIG. However, the inlet passage portion is not configured to accumulate the processing powder, and may have a cylindrical shape having an intake port and an exhaust passage port, for example.
(2) Further, the dust collecting container 1 according to the above embodiment has the bearing 7 as shown in FIG. However, the bearing may not be provided, and the exhaust passage port 2d of the inlet passage portion and the intake port 3a1 of the cyclone unit 3 may be rotatably attached. It is preferable that oil is applied between the exhaust passage port 2d and the intake port 3a1.
(3) The power tool according to the above embodiment is a belt sander. However, the power tool is not limited to a belt sander, and may be another electric tool capable of winding up processing powder with a rotary tool, such as a circular saw or a groove.
(4) The portable holding part 22 of the above embodiment has a belt-like band 22a as shown in FIG. However, the portable holding unit may be configured to have a string or a chain instead of the belt-like band 22a.
(5) As shown in FIG. 3, the cyclone unit 3 according to the above embodiment is configured to tilt forward and backward (left and right in FIG. 3) with the exhaust passage port 2d of the inlet passage portion 2 as a rotation axis. . However, the cyclone unit may be configured to be able to tilt not only in the front-rear direction but also in the left-right direction (the thickness direction in FIG. 3) with respect to the inlet passage portion.
(6) The dust collecting container 1 according to the above embodiment is pipe-connected to the discharge nozzle 14 of the electric tool via the deformable connecting pipe 15 as shown in FIG. However, the dust collecting container may be connected to the discharge nozzle without using a deformable connection pipe, or connected to the discharge nozzle through a non-deformable connection pipe. In such a case, when the entrance passage portion is inclined with respect to the ground depending on the posture of the electric tool, the cyclone body is inclined with respect to the entrance passage portion, and the cyclone body is in a predetermined angle state with respect to the ground. Maintained at.
(7) The dust collecting container 1 according to the above embodiment has a form that is supported on the shoulder or waist by the portable holding unit 22 as shown in FIG. However, the portable holder may be a handle that is held by hand.

It is a left view of a dust collecting container and a belt sander. It is a left view of a dust collecting container. It is a partial cross section left view of a dust collecting container. It is a partial cross section top view of a dust collecting container.

Explanation of symbols

1. Dust collection container (portable dust collection container)
2 ... Inlet passage portion 2a ... Dust collection chamber 2b ... Intake port 2d ... Exhaust passage port 3 ... Cyclone unit 3a ... Cyclone body 3b ... Lid member 3a1 ... Intake port 3a2 ... Processed powder discharge port 3b3 ... Exhaust port 3c ... Exhaust port member 3d ... Weight 4 ... Dust collection box 4a ... Dust collection chamber 4b ... Opening 5 ... Intake port member 5a ... Cylindrical body part 5b ... Spherical mounting part 6 ... Direction regulating member 7 ... Bearing 8 ... Anti-scattering curtain 8a ... Vertical cut (Cutting)
8b ... Horizontal cut (cut)
9 ... Bottom lid 10 ... Belt sander (electric tool)
12 ... Sanding belt 14 ... Discharge nozzle 15 ... Connecting pipe 22 ... Portable holding part 22a ... Band

Claims (5)

A dust collection container for an electric tool connected to a discharge nozzle of the electric tool to collect the processing powder wound up by the electric tool,
The exhaust passage integrally connected to the discharge nozzle, a cyclone unit connected to the inlet passage, and a dust collection box for storing the processing powder discharged from the cyclone unit,
The cyclone unit includes a cyclone body that rotates and drops processing powder sent together with air from the inlet passage portion side along a wall surface, and the processing powder toward the dust collection box below the cyclone body. A processing powder discharge port, and an exhaust port for exhausting air above the cyclone body,
The cyclone body is tiltably attached to an exhaust passage port formed in the inlet passage portion, and the cyclone body tilts about the exhaust passage port by gravity so that the cyclone body is tilted with respect to the ground. A dust collecting container for an electric power tool, wherein the dust collecting container is tilted so as to be maintained at a predetermined angle. A dust collecting container for an electric power tool according to claim 1,
A dust collecting container for an electric tool, characterized in that an exhaust passage opening of an inlet passage and an intake opening provided in a cyclone main body are rotatably attached. A dust collecting container for an electric power tool according to claim 1 or 2,
An inlet member is provided between the inlet passage and the discharge nozzle,
The intake port member includes a spherical spherical mounting portion rotatably attached to the inlet passage portion, and a connecting pipe that passes through the spherical mounting portion and is connected to the discharge nozzle or the discharge nozzle at one end thereof. A pipe-shaped cylindrical body portion, and the intake port member is rotatable about the cylindrical body portion with respect to the inlet passage portion and centered on the spherical mounting portion. A dust collecting container for an electric tool characterized by being attached to be tiltable. A dust collection container for an electric power tool according to any one of claims 1 to 3,
A portable holding part for carrying a container body comprising an inlet passage part, a cyclone unit and a dust collection box is attached to the container body,
The portable holding unit is configured to have a band, a string, or a chain that can be hung on a shoulder or waist, and is a dust collection container for an electric tool. A dust collection container for an electric power tool according to any one of claims 1 to 4,
The dust collection box has an opening and an anti-scattering curtain covering the opening.
The anti-scattering curtain has a lower end portion of the cyclone main body inserted therein, and a notch that allows the cyclone main body to tilt is formed by allowing the lower end portion to move. Dust container.

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