JPH07223116A - Dust eliminating cover for portable type rotary tool - Google Patents

Abstract

PURPOSE:To simply and easily attach and detach a dust proof cover by providing a cover attaching annular shaft roughly C formed when viewed from a side surface on a cover main body so as to be attached to and detached from a cover attaching fixing shaft part provided coaxiliarlly with a rotary body attaching shaft. CONSTITUTION:A cover attaching annular shaft 11 roughly C formed when viewed from a side surface forms an elastic body to be capable of being expanded in a radial direction and is provided with an inner diameter sightly smaller than the outer diameter of a cover attaching fixing shaft part 6 and the length in a circumferential direction at least over 180 deg.. When the cover attaching annular shaft 11 is fitted to the cover attaching fixing shaft part 6, it is surely held and fixed to the cover attaching fixing shaft part 6 by means of the elastic force of this cover attaching annular shaft 11, and even when the outer diameter of the cover attaching fixing shaft part 6 is a lightly larger than a specified dimension, it is easily attached to the fixing shaft part 6. Cur powder and polishing powder generated during processing of a part to be processed by a rotary body 8 are absorbed into the inside from the tip of a cover main body 9, and also absorbed into an absorbing cylinder 10 and discharged and removed to an absorbing device side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust remover which is attached to a portable rotary tool such as a hand-held cutter or a sander to suck and remove chips and abrasive powder generated when the rotary tool is used. It is about the cover.

[0002]

2. Description of the Related Art Conventionally, a dust cover for a portable rotary tool such as a cutter or a sander has been known. However, the conventional dust cover is mounted integrally with a rotary body of the rotary tool. When installing and removing it,
It was necessary to remove the rotating body from the rotating body mounting shaft one by one, and the attachment / detachment work was extremely troublesome.

On the other hand, when a portable rotary tool such as a cutter or a sander without a dust cover is used, the machined portion such as the cut portion or the polished portion is relatively small, such as the floor surface or the workbench. If it is on a horizontal surface where it is easy to work, turn the cutter, grindstone, etc. vertically, touch the lower side of the rotor to the processing part, and raise the handle of the rotary tool to the rear. However, if the processing part is on an upright surface such as a wall surface or the ceiling surface, it is difficult to work in the normal posture as described above, so the handle of the rotary tool should be placed on the upright surface of the processing part. In a state of being orthogonal to each other, the rotating body is oriented horizontally or vertically, and the tip of the rotating body is applied to the processing portion to perform the work. That is, depending on the position of the processing portion, the side surface side of the rotating body such as a cutter or a grindstone may be used and the tip side may be used.

However, in order to effectively suck and remove cutting chips, polishing powder, etc., the dust cover for a portable rotary tool leaves only the substantial working area of the rotary body and leaves the peripheral portion of the rotary body. It is desirable to provide so as to cover a wide range. However, in actual field work, depending on the position of the processing part, the effective working area of the rotating body may be on the lower side surface side of the rotating body or on the tip side as described above. If it is provided integrally with the rotary tool as in the prior art, at least two types of dust removal covers, one for the lower side surface of the rotor and one for the tip of the rotor, are required, which is costly and extremely difficult to handle. It's inconvenient.

[0005]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and a dust cover according to claim 1 covers a peripheral portion of a rotary body 8 such as a cutter of a rotary tool 2. A cover body 9 having a substantially U-shaped cross section,
The cover body 9 is composed of a suction cylinder 10 that is continuously connected to the cover body 9, and the cover body 9 is removably attached to a cover attachment fixed shaft portion 6 concentrically provided with the rotating body attachment shaft 5. The cover mounting ring shaft 11 is substantially C-shaped in side view, and the ring shaft 11 has an inner diameter slightly smaller than the outer diameter of the fixed shaft portion 6 and a circumferential length of at least 180 degrees or more. Is characterized by.

According to a second aspect of the dust removing cover, both end portions 11 of the cover mounting ring shaft 11 at an angle of at least 180 degrees or more.
It is characterized in that a and 11a are formed so that the edges thereof are cut off from the cover body 9.

According to a third aspect of the dust cover, the cover body 9 is integrally provided with the suction cylinder 10 and has a fixed cover portion 9a having a cover mounting ring shaft 11, and the inside of the fixed cover portion 9a. And a movable cover portion 9b that is rotatably fitted around the rotating body mounting shaft 5 and that allows the non-covered position of the rotating body 8 to be displaced in the circumferential direction. A communication port 12 that communicates with the inside of the tubular body 10 is provided, and the movable cover portion 9b is provided with communication ports 13 and 14 that overlap the communication port 12 on the fixed cover portion 9a side at a predetermined rotation position. Characterize.

The dust removing cover according to a fourth aspect is characterized in that a dust collecting brush 19 is provided at a tip end portion of the movable cover portion 9b.

The dust removing cover according to a fifth aspect is characterized in that the dust collecting brush 19 is detachably attached to the tip of the movable cover portion 9b.

The dust cover according to a sixth aspect is characterized in that the movable cover portion 9b is provided with a lid for opening and closing the communication port 13.

The dust cover according to a seventh aspect is characterized in that the suction cylinder 10 is fixed to the body portion 3 of the rotary tool 2 by a fixing band 28.

[0012]

[Action]

According to the first aspect of the present invention, when attaching the dust cover 1, the cover mounting ring shaft 11 is attached to the cover of the rotary tool 2 while the cover main body 9 is fitted to a required portion around the rotary body 8 of the rotary tool 2. The dust-removing cover 1 is attached to the rotary tool 2 by one-touch by fitting it to the fixed shaft portion 6 for use. In this case, the cover mounting ring shaft 11 forms an elastic body that is substantially C-shaped in side view and can be expanded in diameter, and has an inner diameter slightly smaller than the outer diameter of the cover mounting fixed shaft portion 6, and at least an inner diameter. Since the cover mounting ring shaft 11 has a circumferential length of 180 degrees or more, once the cover mounting ring shaft 11 is fitted into the cover mounting ring shaft 6, the elastic force of the cover mounting ring shaft 11 causes the cover mounting ring shaft 11 to be fixed. 6 is securely held and fixed to the fixed shaft portion 6, and even if the outer diameter of the fixed shaft portion 6 for mounting the cover is slightly larger than a predetermined size, the fixed shaft portion 6 can be easily attached to the fixed shaft portion 6. Further, when removing, the dust removing cover 1 can be easily and easily removed by pulling out the cover attaching ring shaft 11 from the cover attaching fixed shaft portion 6.

In using the dust cover 1,
The cutting powder, the polishing powder, and the like generated during the processing of the processing portion by the rotating body 8 are sucked into the inside of the suction body 10 from the tip portion of the cover body 9, and the suction cylinder body 1 is sucked.
It can be discharged and removed to the suction device side connected to 0.

In the second aspect, the cover mounting ring shaft 11
Both ends 11a, 11a of the fixed cover portion 9a are formed so that the edges thereof are cut off.
Since a has sufficient elasticity, it is possible to easily attach / detach the cover mounting ring shaft 11 to / from the cover mounting fixed shaft portion 6.

In the third aspect, the cover main body 9 is attached to the rotary tool 2 by fitting the cover attaching ring shaft 11 of the fixed cover portion 9a into the cover attaching fixed shaft portion 6 of the rotary tool 2. The peripheral portion of the rotating body 8 is covered with the movable cover portion 9b fitted in the fixed cover portion 9a. Therefore, the position of the processed portion such as the cut portion or the polished portion is a horizontal plane S that is easy to work on, for example, the floor surface or the workbench.
1 is on, the movable cover portion 9b is rotated by a predetermined angle with respect to the fixed cover portion 9a, and the non-covered position P is moved to the rotary body 8
It can be set on the side of the exposed side.

For processing, however, the rotating body 8
In a normal working posture in which the rotary body mounting shaft 5 is positioned horizontally and the rotary tool 2 is lifted up, the lower side surface portion of the rotary body 8 is applied to the processing portion on the horizontal plane S1. Remove the rotary tool 2 along the processing part and remove the dust cover 1
Processing can be performed while moving together with it. Cutting chips, polishing powder, and the like generated during this processing are sucked into the movable cover portion 9b from the tip end portion thereof, and the communication opening 13 on the movable cover portion 9b side and the communication on the fixed cover portion 9a side overlapping with the communication opening 13 are formed. It is sucked into the suction cylinder 10 through the port 12 and discharged and removed to the suction device side.

When the position of the working portion is on an upright surface S2 such as a vertical wall, which is difficult to work in a normal posture, the movable cover portion 9b is rotated by a predetermined angle from the above-mentioned position,
The non-covered position P, which was on the side surface of the rotating body 8 until then, is moved to the tip side of the rotating body 8. The above-mentioned upright surface S
In performing the machining in the machining portion located above 2, when the machining portion extends long in the left-right lateral direction on the upright surface S2, the rotary body mounting shaft 5 of the rotary body 8 is placed in the upright posture. With the horizontal posture in which the rotating body 8 itself is horizontally oriented and the body portion 3 of the rotary tool 2 is orthogonal to the upright surface S2, the tip end side of the rotating body 8 is laterally and horizontally arranged on the upright surface S2. The processing can be performed by applying it to the processing portion extending in the direction. Further, when the processed portion extends long vertically in the vertical direction on the upright surface S2, the rotary body mounting shaft 5 of the rotary body 8 is horizontal and is positioned in the vertical direction of the rotary body 8.

According to the present invention, the dust collecting brush 19 provided at the tip of the movable cover portion 9b can efficiently collect the cutting chips, the polishing powder and the like generated at the time of processing, and the processed object. Parts can be cleaned.

In the fifth aspect, when the dust collecting brush 19 is worn out by use, it can be easily replaced.

According to the sixth aspect, when the movable cover portion 9b is rotated by a predetermined angle in order to change the non-covered position P, one end side of the movable cover portion 9b protrudes from the fixed cover portion 9a and is movable. There is a case where a part of the communication port 13 on the cover portion 9b side is opened to the outside. In such a case, by closing the communication port 13 with the lid 17, the suction action in the movable cover portion 9b is prevented. You can prevent the decline.

According to the seventh aspect, the dust removing cover 1 and the rotary tool 2 are integrated by fixing the suction cylinder 10 to the body portion 3 of the rotary tool 2 by the fixing band 28, so that the work is performed. It will be easier to do.

[0023]

EXAMPLES Examples will be described with reference to the drawings.
1 to 3, reference numeral 1 denotes a dust cover detachably attached to the portable rotary tool 2. The rotary tool 2 is composed of a body portion 3 and a head portion 4, and a rotary body mounting shaft 5 rotated by an electric motor (not shown) is projectingly provided on the head portion 4 and a base end side of the mounting shaft 5 is provided. A cover mounting fixed shaft portion 6 is concentrically fixed to the shaft, and a bearing 7 is interposed between the fixed shaft portion 6 and the rotating body mounting shaft 5. A rotating body 8 such as a disk-shaped cutter or a grindstone is replaceably attached to the mounting shaft 5.

The dust cover 1 is a cover body 9 having a substantially U-shaped cross section so as to cover a required portion around the rotating body 8.
And a suction cylinder 10 integrally connected to the cover body 9 so as to communicate with each other inside.
Has a cover mounting ring shaft 11 having a substantially C-shape in side view, which is removably mounted on the cover mounting fixed shaft portion 6 of the rotary tool 2, and the suction cylinder body 10 is the body portion 3 of the rotating body 8. The length and the diameter are almost the same as Also, the cover body 9
Is a fixed cover portion 9 that is continuously provided integrally with the suction cylinder 10.
a and a non-covered position P of the rotating body 8 which is rotatably fitted in the fixed cover portion 9a around the rotating body mounting shaft 5.
And a movable cover portion 9b that is movable in the circumferential direction, the fixed cover portion 9a is provided with a communication port 12 that communicates with the inside of the suction cylinder 10, and the movable cover portion 9b is provided with a predetermined rotation position. At the communication port 12 of the fixed cover portion 9a
Two communication ports 13 and 14 that overlap with are provided at intervals of, for example, 60 degrees in the circumferential direction. Suction cylinder 1
0 and the fixed cover portion 9a are integrally formed of a synthetic resin such as ABS resin, and the movable cover portion 9b is also formed of a similar synthetic resin.

The structure of the cover body 9 will be described in more detail. As shown in FIGS. 1 to 3, the fixed cover portion 9a covers the peripheral portion of the rotating body 8 over a range of about 120 degrees. The suction cylinder 10 is integrally connected to the one end side of the outer peripheral portion of the fixed cover portion 9a in the outward radial direction. In addition, the movable cover portion 9b is fitted in the fixed cover portion 9a and overlaps with the fixed cover portion 9a.
The rotating body 8 is formed so as to cover the peripheral portion thereof over a range of approximately 240 degrees and is not covered by the movable cover portion 9b.
The non-covered position P is a range of about 120 degrees around the periphery,
The non-covered position P is a substantial working area of the rotating body 8.

As shown by the solid lines in FIGS. 1 and 2, one end of the movable cover portion 9b in the circumferential direction (the end portion on the left side in FIG. 1, the end portion on the right side in FIG. 2) surrounds the fixed cover portion 9a. When it is at a position where it substantially overlaps with one end in the direction, the other end in the circumferential direction of the movable cover part 9b projects from the other end of the fixed cover part 9a by about 60 degrees, and the movable cover part 9b
By rotating one end of b from the position shown by the solid line in the figure to the position shown by the virtual line by about 60 degrees, the movable cover 9
The other end of b is rotated about 60 degrees from the position shown by the solid line in the figure to the position shown by the phantom line, and substantially overlaps the other end of the fixed cover 9a. Therefore, the non-covered position P of the rotating body 8
The movable cover portion 9b is rotated by about 60 degrees from the position shown by the solid line to the position shown by the virtual line in FIG. The range of does not change.

As shown in FIGS. 2, 4 and 5, the cover mounting ring shaft 11 is integrally formed with the fixed cover portion 9a along the inner peripheral portion of the side wall of the fixed cover portion 9a in a substantially C-shape in a side view. It is molded and has an inner diameter slightly smaller than the outer diameter of the cover mounting fixed shaft portion 6 and a circumferential length of 180 degrees or more, for example, about 210 degrees. The cover mounting ring shaft 11 can be expanded in diameter because the ring shaft 11 itself forms an elastic body and the fixed cover portion 9a adjacent to the ring shaft 11 also has appropriate elasticity. ,
Moreover, since both ends 11a, 11a of the ring shaft 11 are formed so as to have edges cut off from the fixed cover portion 9a, they have sufficient elasticity. And, the ring shaft 11 portion excluding the fixed cover portion 9a and both end portions 11a, 11a whose edges are cut off,
It has a circumferential length of 180 degrees or less.

Therefore, when the fixed cover portion 9a is attached to the cover mounting fixed shaft portion 6, the side view substantially C-shaped cover mounting ring shaft 11 is pressed against the cover mounting fixed shaft portion 6 from its opening side. By fitting, the cover mounting ring shaft 11 expands in diameter due to its elastic deformation and is tightly fixed to the outer peripheral surface of the cover mounting fixed shaft portion 6. Further, even if the outer diameter of the cover mounting fixed shaft portion 6 into which the ring shaft 11 is fitted is slightly larger than a predetermined size, the ring shaft 11 can be securely fixed by elastic deformation of the entire ring shaft 11. Further, since both ends 11a, 11a of the ring shaft 11 are formed so that the edges thereof are cut off from the fixed cover part 9a and have sufficient elasticity, the attaching / detaching operation of the ring shaft 11 with respect to the cover mounting fixed shaft part 6 is performed. Can be done easily.

The fixed cover portion 9a has an outer peripheral portion 15 formed along a circumference centered on the axis O (see FIG. 4) of the cover mounting fixed shaft portion 6, and the outer peripheral portion 15 A fitting groove 15a is formed on the inner side, and as shown in FIG. 5, the outer peripheral portion 16 of the movable cover portion 9b is formed in the fitting groove 15a.
Is rotatably fitted around the axis O. Then, the communication port 12 is opened at one end side of the outer peripheral portion 15 of the fixed cover portion 9a, and the outer peripheral portion 16 of the movable cover portion 9b.
The communication ports 13 and 14 are opened.

As shown in FIGS. 6 to 8, one of the communication ports 13 and 14 of the movable cover portion 9b is provided with a lid 17 having an arc-shaped cross section for opening and closing the communication port 13. The lid 17 has a pair of slide grooves 1 provided on the outer peripheral portion 16 of the movable cover portion 9b on both sides thereof.
8 is slidably fitted. The lid 17 opens the communication port 13 in the state shown in FIG. 6 and closes the communication port 13 by sliding the lid 17 in the direction of the arrow from the open state. The opening / closing operation of the lid 17 is performed by the grip portion 1 provided at one end of the outer peripheral surface of the lid 17.
7a can be easily performed.

Further, as shown in FIGS. 1 to 3 and 6, a dust collecting brush 19 can be attached to and detached from the tip portion of the movable cover portion 9b (the end portion on the side opposed to the rotating direction of the rotating body 8). Installed on. As is clear from FIG. 9, the dust collecting brush 19 has a U-shaped mounting frame 20 made of synthetic resin, and a base end portion 21a fixed to the outer peripheral surface of the mounting frame 20 via an adhesive or the like. It is composed of a U-shaped bristle material 21 that projects long along the outer peripheral surface of the mounting frame 20, and locking pieces 20a, 20a are provided so as to face each other at both ends of the U-shaped mounting frame 20. Hair material 21
As the material, those having flexibility and elasticity, for example, those made of synthetic resin such as nylon are preferable. The mounting frame 20
May be made of metal.

As is apparent from FIGS. 1, 2, 6, and 8, the U-shaped mounting frame 20 is fitted to the outer peripheral surface of the tip of the movable cover 9b to which the dust collecting brush 19 is mounted. A possible fitting groove portion 22 is formed, and the U-shaped mounting frame 20 is attached to the fitting groove portion 2 as shown in FIG.
2 is fitted from the outside, and the locking pieces 20a, 20a are locked to the inner end of the movable cover 9b.
Also, it can be attached and fixed with one touch in the state shown by the solid line in FIG. 2 or the state shown by the phantom line in FIGS. 6 and 8.
Further, in order to remove the dust collecting brush 19, the U-shaped mounting frame 20 can be easily removed from the fitting groove portion 22 by appropriately opening the opening by elastic deformation.

In FIGS. 1, 2 and 4, reference numeral 23 denotes a fixing screw for fixing the movable cover portion 9b to the fixed cover portion 9a at a predetermined rotating position, and this screw 23 is of the fixed cover portion 9a. The movable cover portion 9b is fixed to the fixed cover portion 9a by screwing the nut 25 fixed in the protruding portion 24 protruding from the outer peripheral portion 15 and pressing the tip of the nut 25 against the outer peripheral portion of the movable cover portion 9b. It is intended to be fixed against.

Further, as shown in FIGS. 1 to 3, a hose connecting end 26 is formed at the base end of the suction cylinder 10 and a required suction device ( The tip end portion of the connection hose 27 extending from (not shown) is connected.

In FIG. 10, when the dust cover 1 is attached to the rotary tool 2, the suction cylinder 10 of the dust cover 1 and the body 3 of the portable rotary tool 2 are connected and fixed by a flexible fixing band 28. It shows the state to do. Although not shown in detail, in this fixing band 28, the inner surface of one end 28a thereof is fixed to the outer peripheral surface of the suction cylinder 10, and a locked cloth is provided on the outer surface of the one end 28a. Also this band 2
On the inner surface of the other end 28b of 8, a locking cloth capable of locking the locking cloth is provided.

Therefore, when using the fixing band 28, the other end 28b side of the band 28 is attached to the rotary tool 2
The suction cylinder 10 is wound around the body part 3 of the other end 28b, and the locking cloth on the inner surface of the other end 28b is locked to the locked cloth on the outer surface of the one end 28a. It can be easily and easily connected and fixed to the portion 3. As shown in FIG. 3, an engaging groove 29, which is slightly wider than the width of the band 28, is formed in a required portion of the outer peripheral surface of the suction cylinder 10 to which the band 28 is attached, and is wound. The band 28 is displaced on the suction cylinder 10 in the longitudinal direction of the cylinder 10,
I try not to slip.

Further, as shown in FIGS. 3 and 10, the side surface portion of the suction cylinder 10 that abuts on the body portion 3 of the rotary tool 2 is
The concave surface 1 corresponding to and engaging with the convex surface 3a of the body portion 3
Since 0a is formed, the suction cylinder 10 can be supported in a stable state by the body portion 3.

Explaining how to use the dust cover 1 having the above-described structure, the dust cover 1 will be described.
When attaching the rotary hose to the portable rotary tool 2, first, connect the hose 2 of the suction device to the hose connecting end 26 of the suction cylinder 10.
Connect 7. As this suction device, a home vacuum cleaner or an industrial vacuum cleaner can be used. Then, while the suction cylinder 10 is translated from the rear of the rotary tool 2 to the front along the body portion 3 thereof, the cover mounting ring shaft 11 of the fixed cover portion 9a is moved to the cover mounting fixed shaft of the rotary tool 2. The cover body 9 is fitted to the portion 6, and the movable cover portion 9b fitted in the fixed cover portion 9a is fitted to a required peripheral portion of the rotating body 8 so that the cover body 9 is rotated to the rotating body 8 of the rotary tool 2.
It can be attached and fixed so as to be concentric with respect to. Further, the suction band 10 is fixed by the fixing band 28.
Can be integrally fixed to the body 3 of the rotary tool 2.

When the dust cover 1 is attached to the rotary tool 2 in this manner, the non-covered position P of the rotary body 8 is changed to the tip portion of the rotary body 8 depending on the position of the processed portion such as the cut portion or the polished portion. Either side or side. That is, when the position of the processing portion is on a horizontal plane S1 (see FIG. 1) such as a floor surface or a workbench, the movable cover portion 9b is attached to the movable cover portion 9b as shown by the solid lines in FIGS. Circumferential end (tip)
Is rotated to a position so as to substantially overlap with one end of the fixed cover portion 9a in the circumferential direction, so that the non-covered position P comes to a position deviated from the tip end portion of the rotary body 8 toward the side surface portion. Then, at this position, the movable cover portion 9b is fixed by the fixing screw 23. The rotating body 8 is supposed to rotate in the direction of the arrow in FIG. 1 (counterclockwise in FIG. 1, clockwise in FIG. 2).

If the non-covered position P is set at the side surface (lower side surface) side of the rotating body 8, the rotating body 8 is
The lower surface portion of the rotating body 8 is machined on the horizontal plane S1 with the rotating body mounting shaft 5 standing upright and the body portion 3 side of the rotary tool 2 being lifted up. Then, the rotary tool 2 is moved together with the dust cover 1 along the processing portion to perform cutting or polishing. At this time, the dust collecting brush 19 attached to the tip of the movable cover portion 9b has its tip end on the horizontal plane S.
It slides along the processed portion while being pressed against 1 and elastically deformed. Then, cutting chips, polishing powder, and the like generated at the time of this processing are sucked into the movable cover portion 9b by the dust collection brush 19, and the communication port 13 on the movable cover portion 9b side and the fixed cover portion 9a side overlapping with this are formed. It is sucked into the suction cylinder 10 through the communication port 12, and is discharged and removed to the suction device side through the connection hose 27. Dust collection brush 19
Cleans the cut portion or the polished portion while collecting the cutting chips and the polishing powder. Incidentally, the communication port 1 of the movable cover portion 9b
4 is closed by the outer peripheral portion 15 of the fixed cover portion 9a.

When the position of the processed portion is on the upright surface S2 (see FIG. 1) such as a vertical wall, the fixing screw 2 is used.
3 is loosened and the movable cover portion 9b is rotated about 60 degrees from the position shown by the solid line in FIG. 1 and FIG. 2 to the position shown by the phantom line, and the non-covered position P on the side surface of the rotating body 8 until then. The rotor 8 is moved to the tip end side, and the movable cover portion 9b is fixed at that position. In this case, the tip end side of the movable cover portion 9b projects from the tip end of the fixed cover portion 9a to open the communication port 13, and the suction action is reduced at the tip end side of the movable cover portion 9b. Is closed to close the communication port 13.

Therefore, in performing the machining in the machining portion located on the upright surface S2, the machining portion is the upright surface S2.
When extending upward in the left-right lateral direction, the rotating body 8 itself is positioned horizontally so that the rotating body mounting shaft 5 of the rotating body 8 is in an upright posture, and the body portion 3 of the rotary tool 2 is raised upright. In a state of being orthogonal to the surface S2, in this state, the tip end side of the rotating body 8 is applied to the processing portion extending in the left-right lateral direction on the upright surface S2, and processing is performed. In addition, when the processed portion extends in the up-down direction on the upright surface S2, the rotating body 8
The rotating body mounting shaft 5 may be horizontal and the rotating body 8 itself may be in an upright posture. Also at this time, the dust collecting brush 19 is elastically deformed so that the tip end side thereof is pressed against the upright surface S2 and follows the upright surface S2. The cutting dust, the polishing dust, and the like generated during this processing are sucked into the movable cover portion 9b by the dust collecting brush 19, and the communication opening 15 on the movable cover portion 9b side and the communication on the fixed cover portion 9a side overlapping with the communication opening 15 are formed. Mouth 12
Is sucked into the suction cylinder 10 through the connection hose 2
It is discharged to the suction device side via 7 and removed.

The dust collecting brush 19 is worn out over a number of times, and the bristle material 21 is worn away. Therefore, it is necessary to replace it with a new one. When replacing the dust collecting brush 19, the U-shaped mounting frame 20 of the old brush 19 is used.
Can be removed from the fitting groove 22 at the tip of the movable cover 9b, and the U-shaped mounting frame 20 of the new brush 19 can be fitted into the fitting groove 22. Therefore, the replacement work is extremely simple.

In the embodiment described above, the cover body 9
A fixed cover portion 9a in which
And the movable cover portion 9b rotatably fitted in the fixed cover portion 9a, the cover main body may be constituted by only the fixed cover portion. In this case, the non-covered position P is always a fixed position on the periphery of the rotating body 8, and the position cannot be adjusted. In the embodiment, the structure is such that the suction cylinder 10 overlaps the body 3 of the rotary tool 2 in parallel with the cover body 9 attached to the head 4 of the rotary tool 2. The cylindrical body does not necessarily have to have a structure that overlaps the body of the rotary tool, and can have any structure.

Further, in this embodiment, the non-covered position P is changed every time the movable cover portion 9b of the cover body 9 is rotated about the fixed cover portion 9a in the circumferential direction by about 60 degrees in forward and backward directions. However, the angle may be any required angle. For example, the non-covered position P may be changed between the front end side and the side surface side of the rotating body 8 every time the movable cover portion 9b is rotated about 90 degrees forward and backward with respect to the fixed cover portion 9a. . Further, the non-covered position P is not limited to two positions on the tip end side and the side surface part side of the rotating body 8, but may be changed stepwise to three or more positions. Further, in the embodiment, the cover body 9 and the suction cylinder 10 are made of synthetic resin, but may be made of a metal plate.

[0046]

According to the first aspect of the present invention, since the dust cover is removable from the rotary tool, maintenance such as cleaning of the cover can be easily performed. In particular, when mounting this dust cover, it is only necessary to fit the cover mounting ring shaft provided on the cover body to the fixed shaft part for cover mounting on the rotating tool side, and when removing this cover mounting ring shaft. Since it suffices to pull out the dust removing cover from the fixed shaft portion for attaching the cover, the attachment and detachment work of the dust cover becomes very easy and easy. The cover mounting ring shaft has a substantially C-shape when viewed from the side and forms an elastic body whose diameter can be expanded, and has an inner diameter slightly smaller than the outer diameter of the cover mounting fixed shaft portion and at least 180 degrees.
Since it has a circumferential length of more than 40 degrees, it is securely held and fixed to the cover mounting fixed shaft portion, and even if the outer diameter of the cover mounting fixed shaft portion is slightly larger than a predetermined dimension, the fixed shaft portion 6 Can be easily installed.

According to the second aspect of the present invention, both ends of the cover mounting ring shaft are formed so as to be cut off from the fixed cover part and have sufficient elasticity. The attachment / detachment operation can be easily performed.

According to the third aspect of the present invention, the non-covered position, which is a substantial working area of the rotating body, is determined by the position of the processed portion such as the cut portion or the polished portion. It can be easily changed to the part side, whereby cutting chips, polishing powder, etc. generated during processing can be more effectively collected and sucked and removed, and workability can be improved. .

According to the fourth aspect, the dust collecting brush provided at the tip of the movable cover portion can efficiently collect the cutting chips, the polishing powder, etc. generated during the processing, and the cleaning of the processed portion. It can be performed.

According to the fifth aspect, when the dust collecting brush is worn out due to its use, it can be easily replaced with a new one.

According to the sixth aspect, when the movable cover portion is rotated by a predetermined angle in order to change the non-covered position, one end side of the movable cover portion projects from the fixed cover portion and one side of the movable cover portion side. When the communication port of the part is opened to the outside, the communication port can be closed with a lid, so that it is possible to prevent a decrease in suction action in the movable cover part and always perform a good dust removal action. it can.

According to the seventh aspect, by fixing the suction cylinder to the body of the rotary tool with the fixing band,
Since the dust cover and the rotary tool are integrated, the work becomes easier.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a dust removing cover according to the present invention, and is a drawing seen from the side opposite to a rotating body in a state where the cover is attached to a rotary tool.

FIG. 2 is a rear view of the above dust removing cover, as viewed from the rotating body side with the cover attached to a rotary tool.

FIG. 3 is a side view of a dust cover attached to the rotating body.

FIG. 4 is a perspective view showing a cover mounting ring shaft provided in a fixed cover portion of the cover body.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a front view showing a movable cover portion of the cover body.

7 is a cross-sectional view taken along the line BB of FIG.

FIG. 8 is a bottom view of the movable cover unit shown in FIG.

FIG. 9 is a perspective view showing a dust collecting brush.

10 is a cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

 1 Dust Removal Cover 2 Rotating Tool 3 Body of Rotating Tool 4 Head of Rotating Tool 5 Rotating Body Mounting Shaft 6 Fixed Shaft Attachment for Cover 8 Rotating Body 9 Cover Body 9a Fixed Cover Section 9b Movable Cover Section 10 Suction Cylindrical Body 11 Cover mounting ring shaft 11a Both ends of cover mounting ring shaft 12 Communication port 13 Communication port 14 Communication port 17 Lid 19 Dust collecting brush 28 Fixing band

Claims (7)

[Claims] 1. A cover main body having a substantially U-shaped cross section so as to cover a required peripheral portion of a rotary body such as a cutter of a rotary tool.
The cover body is composed of a suction cylinder body that is continuously connected to the cover body, and the cover body is attached to a cover mounting fixed shaft portion concentrically with the rotating body mounting shaft so as to be removably mounted in a C shape in a side view. A ring-shaped cover mounting ring shaft, and the ring shaft has an inner diameter slightly smaller than the outer diameter of the fixed shaft portion and a circumferential length of at least 180 degrees or more. Dust cover for. 2. A dust cover for a portable rotary tool, characterized in that both ends of the cover mounting annulus exceeding at least 180 degrees are formed so as to have edges cut off from the cover body. 3. A cover body, which is integrally provided with a suction cylinder and has a fixed cover portion having a cover mounting ring shaft, and is fitted in the fixed cover so as to be rotatable around the rotating body mounting shaft. And a movable cover portion that allows the non-covered position of the rotating body to be displaced in the circumferential direction, the fixed cover portion is provided with a communication port that communicates with the inside of the suction cylinder, and the movable cover portion includes: The dust cover for a portable rotary tool according to claim 1 or 2, wherein a communication port that overlaps with the communication port on the fixed cover side at a predetermined rotation position is provided. 4. A dust removing cover for a portable rotating tool according to claim 1, 2 or 3, wherein a dust collecting brush is provided at a tip portion of the movable cover portion. 5. The dust removing cover for a portable rotary tool according to claim 4, wherein the dust collecting brush is detachably attached to a tip portion of the movable cover portion. 6. The movable cover part is provided with a lid for opening and closing a communication port thereof.
Or a dust cover for a portable rotary tool according to item 5. 7. The suction cylinder is fixed to the body of the rotary tool by a fixing band.
A dust cover for a portable rotating tool according to 2, 3, 4, 5 or 6.