JP2519945Y2 - Brush attachment device and rotating brush - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush attaching device used for grinding and a rotary brush utilizing the brush attaching device.

[0002]

2. Description of the Related Art Conventionally, a group of brush bristles arranged side by side in a thin plate is folded back at a proper position through a core wire having a proper thickness, and the folded back portion has a substantially U-shaped cross section (hereinafter referred to as a sheath). A thin plate-like brush (hereinafter referred to as "channel brush") wrapped in a "channel") and planted so as to vertically project into the opening of the channel 7 by caulking the opening of the channel 7 is commercially available. However, as shown in FIG. 9, the cross-sectional shape of the channel brush is such that the width of the channel 7 at the folded portion is the width of the channel 7.
It is characterized in that it is expanded compared to the width of the part not wrapped in.

The brush base 11 of the channel brush 2
As shown in FIG. 10, the bottom surface 9 of the channel 7 is fixed to the brush pedestal 11 by welding, and as shown in FIG. 11, one side surface of the end 8 of the channel brush 2 is fixed to the brush pedestal 11. A method in which the tip of a push bolt 15 screwed to the fixed support wall 14 is pressed and the other side is pressed against the receiving wall 13 fixed to the brush pedestal 11 to be fastened, and further, the below-mentioned utility model Sho 60-154018. There is a mounting method disclosed in Japanese Laid-Open Patent Publication No. 62-192866.

In the method of fixing the channel brush 2 shown in FIG. 10, when the brush bristles 5 are worn and are replaced with new channel brushes, the welded metal 12 is removed to remove the worn channel brush 2. There was a problem that the scavenging work was very troublesome because it had to be collected.

In the method of fixing the channel brush 2 shown in FIG. 11, the push bolt 15 is loosened by the vibration generated when the brush rotates, and as a result, the fastening of the end portion 8 of the channel brush 2 is released. There was a problem that the channel brush 2 came off during rotation.

FIG. 12 is a cross-sectional view of a brush mounting device disclosed in Japanese Utility Model Laid-Open No. 154018/1985, in which the channel brush 2 is a slope on one side of the expansion portions 10a, 10b of the end portion 8 of the channel brush 2. 2 is pressed down from above by both ends of the push plate 16, and is pressed against the fixed push plate 17 and fixed by the fastening bolts 18 via the push plate 16.

In the fixing method described above, as shown in FIG. 13, at the end 8 of the channel 7 constituting the channel brush 2, the upper part of the curved surface of the expanded portion on one side of the end 8 is the push plate 16.
Since both end portions 20a and 20b of the end portion 8 are pressed from the upper side to the lower side, there is a tendency that the end portion 8 is easily displaced from the regular assembled state.

Therefore, when the end portion 8 of the channel 7 is displaced from the normal assembled state, the bottom surface 9 of the channel 7 is formed.
Since the brush pedestal 11 is in one-side contact with the brush pedestal 11, the brush pedestal 11, the fixed push plate 17, and the push plate 16 are fastened at respective point contact positions.

As described above, when each point contact portion is fastened, the contact portion is elastically deformed or plastically deformed due to the rotational force of the drive shaft, the abrasion resistance, etc., and these deformations cause the deformation. A gap is generated at the contact portion, and this gap causes the push plate to vibrate due to the expansion portion, the shaft rotating force, the polishing and sweeping resistance force, etc., and finally the fastening bolt 18 of the push plate 16 loosens. As a result, the channel eventually loosens. There is a problem that the channel brush may come off.

FIG. 14 and FIG. 15 show the actual construction sho 62-19.
2866 shows a method for attaching a brush, which is shown in Japanese Patent No.
Disclosed is a method of attaching the polishing line 23 constituting the polishing brush 24, that is, the channel brush 2 referred to in the specification of the present invention to the circumferential surface of the cylinder. Has been done. The above-mentioned channel brush has the expanded portion 10 of the channel 7 which constitutes the channel brush.
Since the a and 10b and the bottom surface 9 are in close contact with the respective surfaces of the fitting portion of the channel 7 provided on the cylinder 22, it looks as if they are securely fastened to the cylinder, but the expanded portion of the channel 7 Adhering the entire surfaces 10a, 10b and the bottom surface 9 invariably causes statistical variations in the shapes and dimensions due to manufacturing, processing, etc. Especially, in the case of bending such as the channel 7, the variations are large. However, the polishing brush 24 is very expensive because it is complicated and takes a long time to manufacture and process the shape and dimensions within the range of variation for practical use. It becomes something that has no practical value economically.

Particularly, it is more complicated to form the groove having the cross-sectional outer shape of the channel 7 of the polishing wire 23 shown in FIG. It is natural that it has no practical economic value.

Further, since the pressing plate 25 and the fastening bolt 26 are located in the back of the group of brush bristles 5 adjacent to each other when the channel brush is fastened, the group of adjacent bristles 5 of bristles interferes. In order to perform the work such as fastening the fastening bolts 25 in a place where the fastening state of the channel is difficult to see, the fastening state shown in FIG. 16, that is, the bottom surface 9 of the channel 7 provided on the brush pedestal 11 and the one-side expanded portion, respectively. It tends to be in a state of being fastened at each of the point contact positions with the contact surface and the pressing plate 26.

Therefore, when the point contact portion of the channel brush 2 is deformed by the vibration of the driving shaft 21 due to the rotational force, the grinding resistance force, etc., as shown in FIG. There was a risk of slipping out between the contact surface of the expansion part of.

In the polishing brush 24,
As shown in FIG. 17, when the push plate 25 pushes the end portion 8 of the channel 7 in a state where a gap is formed in the lower portion of the push plate 25, the channel brush 2 is affected by the rotational force of the drive shaft, the grinding resistance force, and the like. If the contact part is deformed due to vibration,
There has been a fatal problem that the brush push plate is loosened, and then the fastening of the push plate fastening bolt is loosened, and finally the channel brush may come off.

Further, in the polishing brush 24,
When the core wire 6 that constitutes the channel brush 7 is thin, the difference between the maximum outer surface width of the bent portion of the channel and the outer surface width of the crimped portion becomes small, so that the pressing plate 25 becomes unstable and the channel brush is fastened. There was a problem that became unstable.

[0016]

Therefore, the present invention solves the above-mentioned problems of the prior art, allows easy replacement of the channel brush, and the expanded portion of the channel brush has a rotational force of the brush and a resistance to polishing and cleaning. A brush attachment device having a structure that does not loosen due to vibrations generated by the brush attachment device.

[0017]

The present invention has been made in view of the above circumstances, and provides the following brush attachment device and rotary brush in order to solve the above problems.

1) The tip of the T-shaped channel brush receiving portion, in which the brush bristle side surface above the expanded portion of the channel brush is disposed in the center of the upper surface of the channel brush mounting pedestal along the axis of the pedestal. And the tip of the hook portion of the hook-shaped channel brush pressing plate disposed on the side surface of the channel brush mounting base, and the channel brush pressing plate is fastened to the side surface of the channel brush mounting base via bolts. Brush attachment device.

2) At the top of the expanded portion of the channel brush,
The tip of the T-shaped channel brush receiving portion arranged along the axis of the pedestal at the center of the upper surface of the channel brush mounting pedestal, and the hook-shaped tip disposed on the side surface of the channel brush mounting pedestal. A brush attachment device, which is sandwiched between the channel brush pushing plate and the tip of the hook portion, and the channel brush pushing plate is fastened to the side surface of the channel brush mounting base via bolts.

3) Channel brush mounting pedestals are arranged radially on the outer peripheral surface of the brush mounting shaft in the radial direction along the axis of the brush mounting shaft, and the ends of the channel brush mounting pedestal near the brush mounting shaft. A rotating brush fastened to the outer circumference with bolts.

4) The channel brush mounting pedestals are arranged radially on the outer peripheral surface of the brush mounting shaft along the axial center of the brush mounting shaft, and the channel brush mounting pedestals are arranged in an appropriate number in the axial direction. With the division
A rotary brush in which the channel brush mounting bases that are adjacent to each other in the axial direction are arranged in a staggered array in the radial direction.

[0022]

1 is a cross-sectional view of an embodiment in which a channel brush 2 is assembled to a brush mounting device 1 of the present invention.
The two channel brushes 2 are provided in the center of the upper surface of the brush pedestal 27, and a brush receiving portion 28 is provided in parallel with the axis of the pedestal 27 so that the bottom surface 9 of the channel 7 of the channel brush 2 abuts on the upper surface of the brush pedestal 27. Further, both side surfaces of the brush bristles 5 immediately above the channel 7 are pressed against the end faces of the protrusions 31 provided on the top of the brush receiving portion 28 by the end faces of the protrusions 31 provided on the top of the brush pressing plate 29, and the brush base 27 It is fixed vertically to the upper surface of.

The brush receiving portion 28 has a T-shaped cross section and has a step having a depth such that a brush expansion portion can be inserted under each of the protrusions 30a and 30b on both side surfaces of the top portion thereof. Is fastened to the brush pedestal 27 by fastening bolts 32 through through holes provided at appropriate intervals in the center of the.

The method of fixing the brush receiving portion 28 is not limited to fixing with the bolts, but the lower portion of the brush receiving portion 28 may be fixed to the brush pedestal 27 by welding or adhesion with an adhesive.

The brush pressing plate 29 has a hook-shaped cross section, and a hook-shaped protrusion 31 is provided at the top of the brush pressing plate 29 on the side of the channel brush 2. Below the protrusion 31, the expansion of the channel brush is formed. A step having a depth that allows the portion to enter is provided, and is fastened to the side surface of the brush pedestal 11 with a fastening bolt 33 through a through hole provided in a lower portion of the brush pressing plate 29.

The protrusions 30a and 30b of the brush receiving portion 28
The respective distances from the protrusions 31 of the brush pressing plate 29 are such that they can be pressed against both side surfaces of the brush bristles 5 of the channel brush 2 and fixed when the brush receiving portion is fixed.

Since the present invention has the above-described structure, when the assembled channel brush 2 is used and worn,
The channel brush 2 includes the fastening bolt 3 of the brush pressing plate 29.
When 3 is loosened, the gap between the end surface of the protrusion 30 of the brush receiving portion 28 and the end surface of the protrusion 31 of the brush pressing plate 29, which are opposed to each other with the brush bristles 5 interposed therebetween, is widened, so that the brush can be pulled out and removed. .

In the new channel brush 2 to be assembled after the removal, the end portion 8 is inserted between the end faces of the protrusions 30 and 31 from above, and the bottom face 9 of the channel brush 2 contacts the top face of the brush pedestal 27. Fastening bolt 3 in contact with
By fastening 3 the brush attachment device 1 of the present invention
To be concluded.

When the channel brush 2 is assembled to the brush pedestal 27, the channel brush 2 is inclined and the bottom portion 9 thereof is inclined.
When the brush push plate 29 is one-sided with the upper face of the brush pedestal 27, the end faces of the protrusions 30 of the brush receiving portion 28 and the protrusions 31 of the brush push plate 29 are tightened as the brush push plate 29 is fastened to the brush pedestal by tightening the fastening bolts 33. In parallel with the end surface of the brush bristles, sandwiching the side surfaces of the brush bristles 5, the bottom portion is fixed by being vertically moved to the upper surface of the brush pedestal 27 while sliding along the upper surface of the brush pedestal 27.

Further, in the channel brush 2, even if the bottom portion 9 of the channel 7 is assembled apart from the upper surface of the brush pedestal 27, the end surface of the protrusion 30 of the brush receiving portion 28 and the end surface of the protrusion 31 of the brush pressing plate 29 are separated from each other. Since it is sandwiched between and firmly fastened perpendicularly to the brush pedestal 27, there is no problem with the polishing function.

Further, the mutual positions of the brush bristles 5 of the channel brush 2 clamped by the end surface of the protrusion 30 of the brush receiving portion 28 and the end surface of the protrusion 31 of the brush pressing plate 29 are displaced during brush driving, or When the channel brush 2 vibrates due to the rotational force of the brush or the grinding resistance force, the brush pressing plate 29 is fastened to the side surface of the brush pedestal. Since the bolts 33 are closely attached and fastened, neither the brush pressing plate nor the fastening bolts 33 vibrate.

Therefore, the fastening bolt 33 does not loosen,
Since the distance between the end surface of the protrusion 30 of the brush receiving portion 28 and the end surface of the protrusion 31 of the brush pressing plate 29 does not increase, the channel does not come out between them, and therefore the channel brush does not drop.

In the case where the fastening portion of the brush is loosened and vibrated, according to the brush mounting method disclosed in Japanese Utility Model Laid-Open No. 60-154018, when the contact portion of the brush mounting end is deformed as described above, Since the push plate loosens and vibrates, the vibration loosens the bolts that fasten the brush push plate, and finally the brush comes off, but there is a fatal defect.
In the brush attaching device of the present invention, since the brush pressing plate itself is directly fastened to the side surface of the brush base by bolts, the fastening bolt 33 does not loosen even if the channel brush 2 vibrates. There is no need to worry.

[0034]

(Embodiment 1) FIG. 5 shows a rotating brush 3 in which the brush mounting device 1 of the present invention is assembled on a brush mounting shaft 34. The brush mounting device 1 is a cylindrical or prismatic brush mounting shaft 34. FIG. 3 is a cross-sectional view of the rotating brush 3 which is fixed to the outer circumference of the rotary brush 3 at equal intervals in the circumferential direction and in parallel with the axis.

As shown in FIG. 6, the brush pedestal 27 constituting the brush attaching apparatus 1 of the present invention is attached to the brush attaching shaft 34 by inserting bolts 36 into through holes 35 provided at both ends of the brush pedestal 27. Then, it is fastened to the outer peripheral surface of the brush mounting shaft 34, but it is not necessarily related to this method, and a method of joining and fixing the lower part of the brush pedestal to the brush mounting shaft 34 by welding, or cast steel, casting or synthetic Alternatively, the brush mounting shaft 37 with a brush pedestal having a structure in which resin or the like is integrated may be used.

(Embodiment 2) FIG. 7 shows a rotary brush 43 of the present invention mounted on a machine frame 38 equipped with a brush driving device (not shown) 44 through a bearing 39 to mount the rotary brush 43. The figure which grinds the to-be-ground object 42 by rotating the sprocket 40 fixed to one end of the shaft 45 via the chain 41 by a brush drive device is shown. FIG. 8 is a sectional view of the rotating brush 43 in FIG.

As shown in FIG. 7, the rotary brush 43 has two types of brush attachment devices 52 and 53 of the present invention, which are different in length, arranged on the outer peripheral surface of the brush attachment shaft 45 at one side end and alternately. A brush attachment device 52,
The brush bristles 48, 49 constituting 53 have a shape similar to the surface contour of the surface to be ground of the object 42 to be ground.

In the case of grinding an uneven surface such as the object to be ground 42 shown in FIG. 7, the channel brushes 46 and 47 themselves constituting the rotary brush 43 are thin and flat, and It is extremely easy to process the tip shape of the bristles 48, 49 into a shape suitable for the finished cross-sectional shape of the object to be ground 42, since it is extremely easy to cut the bristle tips. Four
The rotary brush 43 suitable for grinding a complicated shape can be obtained only by assembling the brush mounting devices 52 and 53 of the present invention in which 6, 47 are provided on the outer periphery of the brush mounting shaft 45.

Further, when the brush bristles 48, 49 are worn, in the brush mounting method according to Japanese Utility Model Laid-Open No. 154018/1985, when the number of radially mounted brushes is large, the bolts of the brush pressing plate are deep in the brush bristles. Since it is located in the above position, it is troublesome to tighten and remove the bolts and the fixing of the brush is unstable as described above. On the other hand, in the rotary brush 43 having the brush attaching devices 52 and 53 of the present invention, Since the brush pedestals 50 and 51 are fastened to the brush mounting shaft 45 with bolts 54 and 55 at both ends of the brush pedestals 50 and 51 with the channel brushes 46 and 47 assembled, the adjacent brush bristles 48 and 49 interfere with each other. Since the bolts 54 and 55 can be easily fastened and removed without being damaged, the worn channel brush 46,
The brush pedestals 50 and 51 with 47 are attached to the brush pedestals 50 and 51 with new channel brushes.
Can be replaced very easily, and the channel brush mounting bases 50, 51 can be firmly fastened, so that the channel brushes 46, 47 can be reliably and stably fixed.

When a conventional rotary brush is used to simultaneously grind an uneven surface such as the object 42 to be ground shown in FIG.
When grinding is performed at the rotational speed and feed rate of a rotary brush suitable for grinding the B surface, the BC surface, which is ground at the same time as the grinding of the AB surface, has a peripheral speed at the tip of the brush that decreases as it approaches the C point from the B point. , The number of rotations and the feed rate of the rotating brush are not suitable for grinding. Therefore, B
The grinding finish state of the C surface is AB as it approaches the C point.
There was a problem that it was inferior to that of the aspect.

When the rotary brush is used to grind at the rotational speed and feed rate of the rotary brush capable of obtaining the grinding finish state of the AB surface at the point C,
The brush bristles on the AB surface have a higher peripheral speed, which promotes wear, and the brush bristles on the BC surface have a larger amount of deformation as they approach the point C from the point B, which reduces the grinding force. It was

Further, when the deformation of the brush bristles becomes large and permanent deformation occurs, the brush bristle grinding force is drastically reduced, and the tip of the brush bristles comes from the contact part with the object to be ground. There is a problem that it cannot be used because it is worn and cut.

However, in the rotary brush 43 of the present invention, as shown in FIG.
By additionally providing the brush attaching device of the present invention for grinding the raised portion, the density of the brush bristles in the raised portion can be increased more than that in the flat portion.

Therefore, the BC surface is provided with an appropriate number of brushes for grinding the BC surface, so that the same grinding as the AB surface can be achieved even if the BC surface is ground at a rotation speed and a feed speed suitable for grinding the AB surface. It will be finished. Therefore, the unevenness of grinding is reduced and the life of the brush bristles is extended.

In addition, the bolts 5 of the brush pedestals 50 and 51
4, 55 are located at the back of the brush bristles 48, 49, but the distance between the adjacent brush bases 50 is at least the brush base 5.
Since there is a width of 1, the brush base 5 at the back of the brush bristle 48
The fastening work of the bolt 55 of No. 1 is not complicated.

Therefore, when the brush bristles 49 for grinding the raised portion are worn out and cannot be used, the brush bristles 49 are attached to the brush attaching device 53 to which the brush bristles 49 are attached. The pedestal 51 is removed from the shaft 45, then the channel brush 47 having the bristles attached thereto is removed, and the channel brush 47 having new bristles is attached to the brush attaching device 53, which is attached to the brush attaching shaft 45. It can be easily replaced by fastening.

Since the channel brushes 46 and 47 themselves have a simple structure, they are easy to manufacture and inexpensive, and the brush attaching device 1 of the present invention allows the replacement of the brushes to be extremely simple as described above. Therefore, it is possible to easily replace only the brush that is unevenly worn.

Further, as is conventionally seen when the brush is unevenly worn, even the brush bristles of the part that is not yet worn are not replaced at the same time as the worn part, so that the channel brushes 46 and 47 are not replaced. Brush bristles 48,4
No. 9 is used at the maximum service life, and the maintenance cost of the brush is low. The above-described method of attaching / removing the channel brushes 46, 47 of the rotary brush 43 of the present invention is a novel brush attaching method that has not been available in the past.

[0049]

The brush attaching device 1 of the present invention is inexpensive in manufacturing cost because the parts constituting the device 1 have a simple shape and the number of the parts is small, and the attachment / detachment of the channel brush is not performed. Easy to do. Also, the brush attachment device 1
The rotating brushes 3 and 43 assembled with are also easy to attach and detach the brush attaching device 1, so that the manufacturing cost thereof is low.

Further, since the channel brush 2 has a thin plate shape and can be easily stored, if the channel brush is worn, it can be removed and installed by an amateur at the site of use of the brush. Therefore, the management of the brush becomes very easy, and the maintenance of the brush becomes very easy. Therefore, the productivity of the equipment using the brush attaching device and the rotating brush of the present invention is remarkably improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a brush attachment device of the present invention.

FIG. 2 is a side view of the brush attachment device of the present invention.

FIG. 3 is a side view of the brush attachment device of the present invention.

FIG. 4 is a plan view of the brush attachment device of the present invention.

FIG. 5 is a cross-sectional view of a rotating brush of the present invention.

FIG. 6 is an assembly view of the brush attaching device of the present invention to the brush attaching shaft.

FIG. 7 is a diagram showing a state in which an object to be ground is ground using the rotating brush of the present invention.

8 is a sectional view of the rotating brush according to FIG. 7, taken along the line AA.

FIG. 9 is a cross-sectional perspective view of a channel brush.

FIG. 10 is a cross-sectional view of a channel brush fixed by welding.

FIG. 11 is a cross-sectional view of a channel brush fixed by bolts.

FIG. 12 is a partial cross-sectional view of the brush attaching device disclosed in Japanese Utility Model Laid-Open No. 154018/1985.

13 is a view showing a state where the channels of the channel brush in FIG. 12 are tightened at respective contact portions of the cylindrical brush mounting shaft, the fixed push plate, and the push plate.

FIG. 14 is a transverse cross-sectional view of the brush attaching device disclosed in Japanese Utility Model Publication No. 62-192866.

FIG. 15 is a cross-sectional view of the brush attaching device disclosed in Japanese Utility Model Laid-Open No. 62-192866.

FIG. 16 is a fastening state diagram of the brush attachment device when the fastening of the channel brush is poor.

FIG. 17 is a fastening state diagram of the brush attachment device when the fastening of the channel brush is poor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brush attachment device 2 Channel brush 3 Rotating brush 4 Plane brush 5 Brush bristle 6 Core wire 7 Channel 8 End part 9 Bottom surface 10a Expansion part 10b Expansion part 11 Brush pedestal 12 Weld fixing metal 13 Receiving wall 14 Support wall 15 Push bolt 16 Push Plate 17 Fixed push plate 18 Fastening bolt 19 Brush mounting shaft 20a End part Cylindrical brush mounting shaft 20b End part 21 Drive shaft 22 Cylinder 23 Polishing line 24 Polishing brush 25 Push plate 26 Brush cone 27 Brush pedestal 28 Brush receiving part 29 Brush push plate 30a Protrusion 30b Protrusion 31 Protrusion 32 Fastening bolt 33 Fastening bolt 34 Brush mounting shaft 35 Hole 36 Bolt 37 Brush mounting shaft with brush base 38 Machine frame 39 Bearing 40 Sprocket 41 Chain 42 Grinding object 43 Rotary brush 44 Brush drive Moving device 45 Brush mounting shaft 46 Channel brush 47 Channel brush 48 Brush bristle 49 Brush bristle 50 Brush pedestal 51 Brush pedestal 52 Brush mounting device 53 Brush mounting device 54 Bolt 55 Bolt 56 Stopper

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Takao Yamamoto 9-27 Kawabuchicho, Yawatahigashi-ku, Kitakyushu City Taihei Industrial Co., Ltd., Yawata Branch (72) Takehiko Takasaki 9-27 Kawabuchicho, Yawatahigashi, Kitakyushu City Taihei Kogyo Co., Ltd., Yawata Branch (72) Inventor Shozo Nakae 931 Kakio, Nakaichi (72) Inventor Haruo Nishio 1-10-10 Naganomaruminami-cho, Yawatanishi-ku, Kitakyushu City (56) References JP-A-49- 16089 (JP, A) JP 51-111765 (JP, A) Actually opened 49-50496 (JP, U) Actually opened 49-150550 (JP, U) Actually opened 63-191926 (JP, U)

Claims (4)

(57) [Scope of utility model registration request] 1. A tip of the T-shaped channel brush receiving portion, in which the brush bristle side surface above the expanded portion of the channel brush is disposed in the center of the upper surface of the channel brush attachment pedestal along the axis of the pedestal. And the tip of the hook portion of the hook-shaped channel brush pressing plate disposed on the side surface of the channel brush mounting base, and the channel brush pressing plate is fastened to the side surface of the channel brush mounting base via bolts. A brush attachment device characterized in that 2. The brush attachment device according to claim 1, wherein the top portion of the expanded portion of the channel brush is held in contact. 3. A channel brush mounting base is radially arranged on an outer peripheral surface of the brush mounting shaft in a radial direction along an axis of the brush mounting shaft, and both ends of the channel brush mounting base are near the brush mounting shaft. The rotary brush according to claim 1 or 2, wherein the rotary brush is fastened to the outer circumference via bolts. 4. The channel brush mounting pedestals are arranged radially on the outer peripheral surface of the brush mounting shaft in the radial direction along the axis of the brush mounting shaft, and the channel brush mounting pedestals are arranged in an appropriate number in the axial direction. The rotary brush according to claim 3, wherein the channel brush mounting bases that are divided and are adjacent to each other in the axial direction are arranged in a staggered manner in the radial direction.