JPH07328839A - Dust removing cover for portable rotary tool - Google Patents

Abstract

PURPOSE:To suck and recover almost all dust generated by cutting by installing a dust collecting brush in an end part of a cover body communicated with a sucking cylinder body. CONSTITUTION:A peripheral necessary part of a rotary cutter 2b is covered with a cross-sectional almost U-shaped cover body 1a, and a dust collecting brush 3 installed on the cover body 1a contacts with a road surface R, and a partition is formed between the road surface R and the cover body 1a by the dust collecting brush 3. Thereby, suction force generated by actuation of a sucking device can sufficiently act on the road surface R. Thereby, dust S generated when the road surface R is cut by rotating the rotary cutter 2b is sucked in the cover body 1a by being guided by the dust collecting brush 3. Since the dust S sticks to the dust collecting brush 3 and blocks up a clearance between brush hairs of the dust collecting brush 3, an entrance of outside air into the cover body 1a at sucking time is reduced, so that the suction force is further strengthened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is attached to a portable rotary tool such as a hand-held cutting machine or sander, and is used for sucking and removing dust such as chips and polishing powder generated when the rotary tool is used. Related to dust cover.

[0002]

2. Description of the Related Art Conventionally, for example, a hand-held cutting machine used for cutting a road surface along the periphery of a repaired portion for repairing a road has a cover attached so as to cover a rotary cutter. A suction device is connected to the suction port provided on the cover, and dust generated by cutting the road surface with a rotary cutter that is rotationally driven is received by the cover and sucked by the suction device, It is designed to prevent the scattering of dust.

[0003]

SUMMARY OF THE INVENTION In the above conventional configuration,
Because there is a fairly large gap between the cover and the road surface,
The suction force of the suction device does not sufficiently act on the cut portion of the road surface, and most of the dust generated by the cutting is scattered to the surroundings, deteriorating the surrounding environment.

In view of the above-mentioned drawbacks, an object of the present invention is to provide a dust cover for a portable rotary tool capable of sucking and recovering almost all the dust generated by cutting.

[0005]

The structure of the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments. The cover body 1a has a cover body 1a formed to have a substantially U-shaped cross section so as to cover a peripheral required portion of the cover body, and a suction cylinder body 1b that is continuously connected to the cover body 1a.
The dust collecting brush 3 is attached to one end of the.

According to the second aspect of the present invention, a cover body 1a having a substantially U-shaped cross section is formed so as to cover a peripheral portion of a rotary body 2b such as a cutter of the rotary tool 2, and the cover body 1a.
And a movable cover 20 which is rotatably fitted in the cover body 1a around the rotary body mounting shaft 2a and is displaceable in the circumferential direction. The cover 20 is provided with communication ports 28 and 29 communicating with the suction cylinder 1b at a predetermined rotation position, and has a structure in which the dust collecting brush 3 is attached to one end thereof. .

The invention according to claim 3 is the invention according to claim 2, wherein the movable cover 20 is provided with a lid 31 for opening and closing the communication port 28.

The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein a cushion member 12 is fixed to a side surface 11 of the suction cylinder 1b facing the rotary tool. Is.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the suction cylinder 1b is bound to the body portion 2c of the rotary tool 2 by the binding band 14. To be adopted.

A sixth aspect of the present invention is the invention according to any one of the first to fifth aspects, in which an end of a suction cylinder 1b, which is connected to the cover body 1a, is connected to a suction hose 9. The portion 8 is provided and the connecting cylinder portion 8 of the suction cylinder body 1b is provided.
The air reservoir 10 having a diameter larger than that of the connecting cylinder portion 8 is provided between the cover body 1a and the cover body 1a.

[0011]

In the invention of claim 1, for example, the road surface R
When cutting with the rotary tool 2, the suction is applied to the suction cylinder body 1b which is continuously connected to the cover body 1a having a substantially U-shaped cross section which covers a peripheral portion of the rotary body 2b such as a cutter of the rotary tool 2. It suffices to connect the device, operate the suction device, and rotationally drive the rotating body 2b to cut the road surface R.

In this case, a required peripheral portion of the rotating body 2b is covered with the cover body 1a having a substantially U-shaped cross section, and the dust collecting brush 3 attached to the cover body 1a contacts the road surface R to collect the dust. Since the dust brush 3 forms a partition between the road surface R and the cover body 1a, the suction force generated by operating the suction device can be sufficiently applied to the road surface R. Therefore, the dust S generated when the road is cut by rotating the rotating body 2 is guided by the dust collecting brush 3 and sucked into the cover body 1a, and the dust S adheres to the dust collecting brush 3. To cover the gaps between the bristles of the dust collecting brush 3, the cover body 1a during suction
The invasion of the outside air into the inside is reduced, so that the suction force is further strengthened, whereby almost all of the dust S can be sucked into the cover body 1a, and the surrounding environment can be favorably maintained.

According to the second aspect of the present invention, the cover body 1a is provided with the movable cover 20 which is rotatably fitted around the rotary body mounting shaft 2a and is movable in the circumferential direction. Even when the rotary tool 2 is directed downward toward a horizontal surface such as a road, sideways toward a vertical wall surface, or upward toward the ceiling surface, the movable cover 20 of the movable cover 20 is aligned with the direction of the rotary tool 2. The movable cover 20 and the cover body 1 can be adjusted by appropriately adjusting the rotating position.
By appropriately setting the positional relationship between a and the horizontal surface, the vertical wall surface, or the ceiling surface, almost all the dust S is covered by the cover body 1
It can be sucked into a.

According to the third aspect of the present invention, the movable cover 20 is rotated by rotating the movable cover 20.
When the communication port 28 provided in the above is exposed from the cover body 1a to the outside, by closing the communication port 28 with the lid 31, it is possible to prevent a decrease in suction force.

According to the fourth aspect of the present invention, since the cushion member 12 is fixedly attached to the rotary tool facing side surface 11 of the suction cylinder 1b, when the suction cylinder 1b is attached to the rotary tool 2, The cushion member 12 is elastically deformed and comes into close contact with the rotary tool 2, the suction cylinder 1b can be integrally attached to the rotary tool 2, and the vibration of the rotary tool 2 is absorbed by the cushion member 12. You can

According to the fifth aspect of the present invention, the suction cylinder 1b is attached to the body portion 2c of the rotary tool 2 by the binding band 14.
It is possible to easily and surely bind and to easily release the bound state.

According to the invention of claim 6, the cover body 1a
At the end of the suction cylinder 1b that is connected to and connected to the suction cylinder 1, a connection cylinder 8 for connection with the suction hose 9 is provided, and a connection is made between the connection cylinder 8 of the suction cylinder 1b and the cover body 1a. Tube section 8
Since the air reservoir 10 having a larger diameter is provided, the suction force is stable and the dust S can be reliably sucked.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a state in which a road surface R is cut by a hand-held cutting machine (rotary tool) 2 equipped with a dust cover 1 which is an embodiment of the present invention. The dust cover 1 is a drive shaft of the cutting machine 2 (rotary body mounting shaft)
A cover body 1a covering a peripheral required portion of a rotary cutter (rotating body) 2b fixed to 2a, and a suction cylinder body which is continuously connected to the cover body 1a and extends along a body portion 2c of the cutting machine 2. 1b, and the dust collecting brush 3 is attached to one end of the cover body 1a (see FIG. 3).

The cover body 1a is made of a synthetic resin material such as ABS resin and has a substantially U-shaped cross section as shown in FIG. 4, and a circle covering the rotary cutter 2b over a range of about 240 °. A bearing that has an arc-shaped top plate portion 4 and a pair of left and right side plate portions 5 and 6 integrally formed with the top plate portion 4 and that supports the drive shaft 2a of the cutting machine 2 on the side plate portions 5 and 6. Part 2
Arc-shaped recesses 5a and 6a having substantially the same diameter as d are formed, and an arc-shaped engaging piece 7 is integrally formed on the peripheral edge of the recess 5a on the cutting machine 2 side over a range of about 240 °. Both end portions 7a, 7a are formed so as to be elastically displaceable from the side plate portion 5, and by simply pressing the engaging piece 7 against the bearing portion 2d, the both end portions 7a, 7a are spread and the engaging portion 7a is extended. The joint piece 7 is fitted into the bearing portion 2d, and in the fitted state, both end portions 7a, 7a of the engaging piece 7 elastically adhere to the bearing portion 2d, so that the cover body 1a is attached to the bearing of the cutting machine 2. Part 2
It can be attached to d easily and securely.

The suction cylinder 1b extends obliquely upward from the top plate 4 and has a connecting cylinder 8 provided at an end thereof.
A suction hose 9 of a suction device (not shown) is connected to. Therefore, by operating the suction device, a suction force can be applied to the road surface R via the suction cylinder 1b and the cover body 1a.

As shown in FIG. 5, the suction cylinder 1b is formed to have a substantially rectangular cross section, and an air reservoir 10 having a diameter larger than that of the connecting cylinder 8 is provided inside the suction cylinder 1b. Power can be stabilized.

Side surface 11 of the suction cylinder 1b facing the cutting machine
Is formed in a circular arc concave shape, and the suction cylinder 1b can be brought close to the cutting machine 2. A cushion material 12 is adhered to the tip end side of the cutting machine facing side surface 11 (see FIGS. 2 and 3), and when the suction cylinder 1b is attached to the cutting machine 2, the cushion material 12 is elastically deformed. Then, the suction cylinder 1b is attached to the cutting machine 2 in order to closely contact the cutting machine 2.
The vibration of the cutting machine 2 can be absorbed by the cushion material 12 while being integrally attached to the.

As shown in FIGS. 3 and 5, the suction cylinder 1
A concave groove 13 is formed on the outer peripheral surface of b except for the side surface 11 facing the cutting machine, and a binding band 14 that engages with the concave groove 13 is wound around the body portion 2c of the cutting machine 2 and both ends of the band 14 are wound. Locking cloth (trade name Velcro) 15a provided on the
By engaging 15b with each other, the suction cylinder 1b
Can be easily and surely bound to the body portion 2c of the cutting machine 2, and the bound state can be easily released.

The dust collecting brush 3 is made of a synthetic resin material having excellent heat resistance and elasticity such as nylon, and has a U-shaped metal support frame 17 for locking the base end portion of the cover body 1a. 1 is fixed to one end of the rotary cutter 2b, and the rotary cutter 2b of the cutting machine 2 is rotated in the direction of the arrow to cut the road surface R, as shown in FIG. The dust collecting brush 3 provided in contact with the road surface R can form a partition between the road surface R and the cover body 1a by the dust collecting brush 3, whereby the rotary cutter 2b can be used. The dust S generated by cutting the road surface R can be received by the dust collecting brush 3, and the suction force generated by the operation of the suction device is sufficiently applied to the road surface R to cover the dust S with the cover body 1a and the cover body 1a. Suction cylinder 1b It can be sucked into the suction device via. Further, even if the road surface R has unevenness, the dust collecting brush 3 is elastically displaced following the unevenness, and the road surface R and the cover body 1a can be reliably partitioned.

In the above structure, the procedure for repairing the road surface R will be described. The bearing piece 2d of the cutting machine 2 is engaged with the engagement piece 7 of the cover body 1a, and the binding band 1 is used.
The dust removing cover 1 is attached to the cutting machine 2 by binding the suction cylinder 1b to the body 2c of the cutting machine 2 at 4, and
The suction hose 9 of the suction device is connected to the connection cylinder portion 8 of the suction cylinder 1b, the suction device is operated, and the cutting machine 2 is driven to rotate the rotary cutter 2b in the direction of the arrow to rotate it. The cutter 2b may be pressed against the periphery of the repaired portion of the road surface R and moved. As a result, the cutting line Ra is formed by the rotary cutter 2b along the periphery of the repaired portion of the road surface R.

In this case, a required peripheral portion of the rotary cutter 2b is covered with the cover body 1a having a substantially U-shaped cross section, and the dust collecting brush 3 attached to the cover body 1a contacts the road surface R to collect the dust. Since the dust brush 3 forms a partition between the road surface R and the cover body 1a, the suction force generated by operating the suction device can be sufficiently applied to the road surface R. Therefore, the dust S generated when the rotary cutter 2b is rotated to cut the road surface R is guided by the dust collecting brush 3 and sucked into the cover body 1a, and the dust S is collected by the dust collecting brush 3. Since the dust adheres to and closes the gaps between the brush bristles of the dust collecting brush 3, the invasion of outside air into the cover body 1a at the time of suction is reduced, and thus the suction force is further strengthened. Almost all can be sucked into the cover body 1a, and the surrounding environment can be maintained in a good condition. In addition,
The dust cover 1 is preferably made of a transparent synthetic resin material. As a result, the state in which the dust S is sucked can be visually confirmed.

6 to 8 are hand-held cutters (rotary tools) to which the dust cover 1 according to another embodiment of the present invention is attached.
2 shows a state in which the road surface R is cut, the movable cover 20 is fitted in the cover body 1a so as to be displaceable in the circumferential direction, and the dust collecting brush 3 is attached to one end of the movable cover 20. (See FIGS. 9 and 10).

The cover body 1a includes a rotary cutter 2b.
An arc-shaped top plate portion 4 covering about 140 °,
It has a pair of left and right side plate portions 5 and 6 integrally formed with the top plate portion 4, and the top plate portion 4 is provided on the outer peripheral side of the inner surfaces of the both side plate portions 5 and 6.
An arcuate engagement groove 21 is formed along the line.

The movable cover 20 is made of a synthetic resin material such as ABS resin and has substantially the same shape as the cover body 1a.
As shown in FIGS. 7 and 8, the arc-shaped top plate portion 22 is formed in a substantially U-shaped cross section and covers the rotary cutter 2b over a range of about 240 °, and is integrally formed with the top plate portion 22. And a pair of left and right side plate portions 23, 24, and both side plate portions 2
An arcuate ridge 25 that fits into the engaging groove 21 is formed on the outer peripheral side of the outer surfaces of the metal plates 3 and 24, whereby the movable cover 20 is fitted into the cover body 1a so as to be displaceable only in the circumferential direction. ing.

A first communication port 28 is formed near the end of the top plate portion 22 on the dust collecting brush 3 side, and a predetermined angle α from the first communication port 28 of the top plate portion 22 (in this embodiment). The second communication port 29 is opened at a position separated by about 70 °), and by rotating the movable cover 20, either one of the communication ports 28 and 29 is communicated with the suction cylinder 1b. By doing so, the attachment angle of the suction cylinder 1b with respect to the movable cover 20 can be changed (FIG. 1).
1).

The first communication port 28 is provided with a lid 31 with a handle portion 31a which is movably fitted in a guide groove 30 formed along the top plate portion 22 so as to be openable and closable, as shown in FIG.
As shown in FIG. 1, the movable cover 20 is rotated so that the suction cylinder 1b is communicated with the second communication port 29.
When the communication port 28 is exposed to the outside from the cover body 1a, by closing the first communication port 28 with the lid 31, it is possible to prevent the suction force from decreasing.

As shown in FIG. 6, a movable cover fixing metal fitting 33 is provided on the top plate portion 4 of the cover body 1a, which is embedded in the protrusion 4a on the outer peripheral surface of the top plate portion 4. Nut 33a and a bolt 33b screwed into the nut 33a. The bolt 33b is screwed in and the tip of the bolt 33b is pressed against the top plate portion 22 of the movable cover 20 to rotate the movable cover 20 in a desired manner. It can be fixed to the cover body 1a at an angular position.

Since the configuration other than the above is almost the same as that of the above-mentioned embodiment, the same parts are designated by the same reference numerals and the description thereof is omitted.

According to the above construction, even if the cutting machine 2 is turned downward for cutting the road surface R, etc., or is turned sideways toward the vertical wall surface, or is turned upward toward the ceiling surface, the cutting machine 2 is cut. By appropriately adjusting the rotating position of the movable cover 20 in accordance with the direction of 2, the positional relationship between the movable cover 20 and the cover body 1a and the horizontal surface, the vertical wall surface or the ceiling surface is appropriately set, and dust is generated. Almost all of S can be sucked into the cover body 1a.

In both of the above embodiments, the case where the road surface R is cut by the rotary cutter 2b has been described as an example, but the present invention can also be applied to the case where a grindstone or a sander is attached instead of the rotary cutter 2b. In addition to the road surface R, the present invention can be applied to, for example, cutting tiles or polishing welded portions.

[0037]

According to the first aspect of the present invention, for example, when a road surface is cut by a rotary tool, a peripheral portion of a rotary body such as a cutter of the rotary tool is covered with a cover body having a substantially U-shaped cross section. At the same time, the dust collecting brush attached to the cover body comes into contact with the road surface, and the dust collecting brush forms a partition between the road surface and the cover body. The suction force generated by operating the connected suction device can be sufficiently applied to the road surface. Therefore, the dust generated when the road is cut by rotating the rotating body is guided by the dust collecting brush and is sucked into the cover body, and the dust adheres to the dust collecting brush to be absorbed by the dust collecting brush. Since the gap between the brush bristles is closed, there is less invasion of outside air into the cover body during suction, which makes the suction force stronger, thereby sucking almost all of the dust into the cover body. And the surrounding environment can be maintained well.

According to the second aspect of the present invention, the rotary tool is turned downward toward a horizontal surface such as a road, sideways toward a vertical wall surface, or upward toward the ceiling surface, and the rotary tool is turned upside down. If the orientation of the movable cover is changed, the rotational position of the movable cover provided in the cover body is adjusted accordingly, and the positional relationship between the movable cover and the cover body and the horizontal plane, vertical wall surface or ceiling surface is adjusted. Can be set appropriately so that almost all of the dust can be sucked into the cover body.

According to the third aspect of the invention, when the movable cover is rotated to expose the communication port provided in the movable cover from the cover body to the outside, the communication port is closed with a lid. By doing so, it is possible to prevent a decrease in suction power.

According to the fourth aspect of the invention, the cushion member can be elastically deformed to integrally attach the suction cylinder to the rotary tool, and the vibration of the rotary tool can be absorbed by the cushion member. .

According to the fifth aspect of the invention, the suction cylinder can be easily and surely attached to the body of the rotary tool with the binding band, and the attached state can be easily released.

According to the sixth aspect of the present invention, since the large-diameter air reservoir is provided between the connecting cylinder of the suction cylinder and the cover body, the suction force is stable and dust is surely secured. Can be aspirated.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a state in which a road surface is cut by a hand-held cutting machine equipped with a dust cover which is an embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a perspective view of the dust cover.

FIG. 4 is a view as seen from the arrow BB of FIG.

5 is a view taken along the line CC of FIG.

FIG. 6 is a vertical cross-sectional view showing a state in which a road surface is being cut by a hand-held cutter equipped with a dust cover which is another embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view of the same main part.

FIG. 8 is a view taken along the line DD of FIG.

FIG. 9 is a perspective view of the dust cover.

FIG. 10 is a perspective view of the movable cover.

FIG. 11 is a vertical sectional view showing a state in which the movable cover is rotated.

[Explanation of symbols]

 2 Cutting machine (rotating tool) 2a Drive shaft (rotating body mounting shaft) 2b Rotating cutter (rotating body) 1 Dust cover 1a Cover body 1b Suction cylinder 3 Dust collecting brush 8 Coupling cylinder 10 Air trap 12 Cushion material 14 Binding band 20 Movable cover 28 First communication port 29 Second communication port 31 Lid

Claims (6)

[Claims] 1. A cover main body formed in a substantially U-shaped cross section so as to cover a peripheral portion of a rotary body such as a cutter of a rotary tool, and a suction cylinder body communicating with the cover main body. A dust removal cover for a portable rotary tool that has a dust collection brush attached to one end of the cover body. 2. A cover main body formed in a substantially U-shaped cross section so as to cover a peripheral required portion of a rotary body such as a cutter of a rotary tool, a suction cylinder body communicated with the cover main body, and a cover. And a movable cover which is fitted in the main body so as to be rotatable about a rotary member mounting shaft and is movable in the circumferential direction. The movable cover communicates with the suction cylinder at a predetermined rotation position. A dust removal cover for a portable rotary tool, which is provided with a communication port and has a dust collection brush attached to one end thereof. 3. The dust cover for a portable rotary tool according to claim 2, wherein the movable cover is provided with a lid for opening and closing a communication port thereof. 4. The dust cover for a portable rotary tool according to claim 1, wherein a cushion member is fixed to a side surface of the suction cylinder facing the rotary tool. 5. The dust cover for a portable rotary tool according to claim 1, wherein the suction cylinder is bound to a body of the rotary tool by a binding band. 6. A connecting cylinder portion for connecting with a suction hose is provided at an end portion of a suction cylinder body which is communicatively connected to a cover body,
The dust cover for a portable rotary tool according to any one of claims 1 to 5, wherein an air pocket having a diameter larger than that of the connecting cylinder is provided between the connecting cylinder of the suction cylinder and the cover body. .