JP2021186916A - Bristle tip cutting body and bristle tip cutting device - Google Patents

Abstract

To provide a bristle tip cutting body and a bristle tip cutting device which can finish a steel plate surface beautifully and can be used with good manufacturing efficiency at a low cost.SOLUTION: A bristle tip cutting body 5 of a bristle tip cutting device 1 which is used for cutting bristle tips 50A of brush bristles 50 of brush roll 3 for polishing a steel plate to perform trimming includes a plurality of sheets of rotary blades 42 having a plurality of grinding teeth 47 in a circumferential direction on an outer circumference part of a disk-like blade main body and a rotary shaft 19 to which the plurality of sheets of rotary blades 42 are attached separately with a gap in a shaft center C1 direction. Therein, the tips of the grinding teeth 47 of the plurality of sheets of rotary blades 42 are formed so as to advance forward in a blade rotation direction. Further, the tips of the grinding teeth 47, 47 which are adjacent to each other in the blade rotation direction are formed so as to be pointed alternately right and left with respect to blade rotation direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a bristles trimmer for trimming the bristles of the brush bristles of a brush roll for polishing a steel plate, and a bristles pruning device using the bristles.

Conventionally, as this type of hair tip cutting device, for example, a device using a hair tip cutting body 65 as shown in FIG. 6 is known. The hair tip cutting body 65 includes a cylindrical body 66 held by a rotating shaft 67 rotating around a horizontal axis C1, and a plurality of grinding blades 68, 68, 68 embedded in the outer peripheral surface of the cylindrical body 66. ... And a fixed blade 69 for cutting the tip 50B of the brush bristles 50 between the rotating grinding blade 68. Both the grinding blade 68 and the fixed blade 69 are plate-shaped blades long in the rotation axis axis C1 direction. The fixed blade 69 is positioned and fixed so that a predetermined gap S is formed between the tip 68A of each grinding blade 68 and the tip 69A of the fixed blade 69. On the other hand, in the brush roll 3, a large number of brush hairs 50, 50, 50, ... Are planted on the outer peripheral surface 37A of the rotary core material 37. A rotation shaft having a rotation center C4 is provided on the center member 49 loaded in the hollow portion of the rotation core member 37. The brush roll 3 rotates at a rotation speed of about 60 rpm (arrow R2 direction).

When arranging the hair of the brush roll 3, the hair tip cutting body 65 (in the direction of arrow R1) that rotates at about 900 to 1200 rpm is moved laterally toward the brush hair 50 of the brush roll 3 together with the fixed blade 69 (arrow). F direction). Then, the tip 50B of the brush bristles 50 is sandwiched between the grinding blade 68 and the fixed blade 69 and cut. In this case, since the brush bristles 50 are cut between the grinding blade 68 and the fixed blade 69, a large rotational resistance is applied to the bristles cutting body 65, so that the rotation speed has to be relatively low. The tip 50B of the brush bristles 50 cut in this way is formed in a tapered shape tapered from both side surfaces of the brush bristles 50, as shown by being enlarged in the circle H of the alternate long and short dash line. The brush roll 3 thus trimmed is rotationally driven to polish the surface of the steel sheet.
As a patent document, the following Patent Document 1 describes a device for adjusting the bristles of the brush bristles of a brush roll using a rotary blade and a fixed blade. However, the object of hair shaping of the apparatus described in this document is not a brush roll for polishing a steel plate but a conductive brush roll.

Japanese Unexamined Patent Publication No. 2006-39436

By the way, as the above-mentioned conventional hair tip cutting device is used over time, the initial tip 68A of each grinding blade 68 is scraped and retracts to the position of the tip 68B. The fixed blade 69 also has the initial tip 69A scraped and retracted to become the tip 69B. That is, the gap S1 between the tip 68B of each grinding blade 68 and the tip 69B of the fixed blade 69 is wider than the initial gap S. When such a wide gap S1 is reached, the sharpness of the brush bristles 50 is reduced, so that the device is stopped, the tightening bolts are loosened, and the grinding blades 68, 68, 68, ... Are removed from the cylindrical body 66. After being replaced with a new one, the centering work is performed. The working time at this time is as long as 5 to 6 hours. The worn grinding blade 68 may be removed and polished in place. If the device is stopped for a long time in this way, the production efficiency is adversely affected, so that work improvement is desired. Further, the polishing work of the worn grinding blade 68 requires a great deal of labor, labor and time, and the cost of polishing becomes high.
Further, in the brush roll 3 composed of brush bristles 50, 50, 50, ... In which the tip 50B is formed in a tapered shape tapered from both sides as described above, the tip portion of the brush bristles 50 is not relatively hard and supple. There is also a problem that the surface roughness of the surface of the steel sheet rubbed by this is not relatively fine and it is difficult to obtain a beautiful surface of the steel sheet.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a hair tip cutting body and a hair tip cutting device that can beautifully finish the surface of a steel sheet and can be operated efficiently and inexpensively. And.

In order to achieve the above object, the hair tip cutting body according to the present invention is a hair tip cutting body used for cutting and trimming the hair tips of the brush hair of a brush roll for polishing a steel plate, and is a disk. A plurality of rotary blades having a plurality of grinding teeth in the circumferential direction on the outer peripheral portion of the shaped blade body and a rotary shaft to which the plurality of rotary blades are attached with a gap in the axial direction are provided. The structure is characterized in that the tip of the grinding tooth of the rotary blade is formed so as to advance forward in the blade rotation direction.

Further, in the above configuration, the tips of adjacent grinding teeth are formed so as to be sharpened alternately on the left and right in the blade rotation direction.

Then, in each of the above-described configurations, a plurality of rotary blades having a shaft insertion hole formed at the center of rotation of the blade body, and a rotary shaft that is passed through and rotationally driven through the respective shaft insertion holes of the plurality of rotary blades. , A flat washer that is mounted on the rotary shaft between adjacent rotary blades to form a gap between the rotary blades, and a fixing member that detachably fixes multiple rotary blades and flat washers mounted on the rotary shaft to the rotary shaft. It is characterized by being equipped with.

Further, in the hair tip cutting device according to the present invention, the hair tip cutting body having each of the above-described configurations, the cutting body rotation driving unit for rotationally driving the hair tip cutting body, and the brush roll for polishing the steel plate are used for the hair tip cutting body. It is characterized by being equipped with a roll rotation drive unit that rotates and drives around the axis parallel to the axis, and a moving mechanism that moves the rotating bristles to a close distance from the brush bristles of the rotating brush roll. It is something to do.

According to the hair tip cutting body according to the present invention, a plurality of rotary blades having a plurality of grinding teeth on the outer peripheral portion are attached to the rotary shaft with a gap in the axial direction, and the tips of the grinding teeth of the rotary blade are attached. Since it is formed so as to advance forward in the blade rotation direction, the tips of a large number of positively pointed grinding teeth in a plurality of rotary blades reliably catch and comb the tips of the brush rolls. Therefore, since the tips of the brush bristles are efficiently cut, it is suitable for polishing steel plates, and a uniform roll curved surface can be finished. By using this hair tip cutting body, a beautiful steel plate surface can be obtained, and it can be operated efficiently and inexpensively.

Further, in the case where the tips of the grinding teeth adjacent to each other in the blade rotation direction are formed to be sharpened alternately on the left and right with respect to the blade rotation direction, for example, a plurality of grinding teeth are alternately formed from the left and right for the tip of one brush bristles. I will hit. As a result, the bristles on the side surface facing the rotary blade of the bristles trimmer are mainly combed, so that a brush roll having bristles having a shape suitable for polishing a steel plate can be obtained.

In the case of using a flat washer that forms a gap between adjacent rotary blades and a fixing member that detachably fixes a plurality of rotary blades and flat washers to the rotary shaft, the fixing member is released to wear. Multiple rotary blades and flat washers can be removed from the rotating shaft. After that, the new rotary blade and flat washer can be fixed to the rotary shaft by mounting the new rotary blade and flat washer on the rotary shaft and operating the fixing member. That is, it is possible to secure a rotary blade having sharp grinding teeth very easily and in an extremely short time only by operating the fixing member. In addition, since the rotary blade having a structure similar to the above-mentioned structure can be obtained as a substitute for an inexpensive commercial product, it goes without saying that the work of replacing parts does not require much labor and time, and the cost of parts for replacement parts is also low. There is.

Further, according to the hair tip cutting device according to the present invention, the hair tip cutting body is rotationally driven by the cutting body rotation driving unit, and the brush roll is rotated around the axis parallel to the axis of the hair tip cutting body by the roll rotation driving unit. Since the hair tip cutting body is rotationally driven and is slidably contacted with the brush hair of the brush roll by the moving mechanism while rotating, the hair tips of the brush hair can be uniformly adjusted in a large amount by such industrial means.

It is a side view which shows the hair tip cutting apparatus and the brush roll which concerns on one Embodiment of this invention. It is a figure which shows a part of the hair tip cutting apparatus, (a) is a front view, and (b) is a plan view. It is a figure which shows the hair tip cutting body of the hair tip cutting device and its component, (a) is the front view of the part including the hair tip cutting body, (b) is the front of the disassembled rotary blade and a flat washer. FIG. 3C is a plan view in which disassembled rotary blades and flat washers are arranged flat. It is a figure which shows the rotary blade, (a) is a side view, (b) is the cross-sectional view taken along the line AA in (a), (c) is the cross-sectional view taken along the line BB in (a). , (D) is a cross-sectional view showing a modified example corresponding to the A-A line arrow view or the BB line arrow view in (a). It is a schematic perspective block diagram which shows the roll rotation drive part of the hair tip cutting apparatus, and the brush roll applied. It is a side view which shows the conventional hair tip cutting apparatus and brush roll which becomes an example of the background of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the embodiments described below are merely examples that embody the present invention, and do not limit the technical scope of the present invention. Here, FIG. 1 is a side configuration view showing a hair tip cutting device and a brush roll according to an embodiment of the present invention, FIG. 2 is a view showing a part of the hair tip cutting device, and (a) is a frontal configuration. The figure and (b) are plan views.
In each figure, the hair tip cutting device 1 according to this embodiment rotates the hair tip cutting body 5 for cutting the hair tips of the brush hairs 50, 50, 50, ... Of the brush roll 3 and the hair tip cutting body 5. The cutting body rotation driving unit 2 to be driven, the roll rotation driving unit 6 that holds the brush roll 3 and rotationally drives it around the axis C2 parallel to the axis C1 of the hair tip cutting body 5, and the cutting body rotation driving unit 2 For the moving body 40 on which the roll rotation driving unit 6 is mounted, the base portion 4 for supporting the entire moving body 40 so as to be movable back and forth, and the brush hairs 50, 50, 50, ... Of the rotating brush roll 3. It is configured to include a moving mechanism 53 for moving the hair tip cutting body 5 close to each other.

The moving body 40 is mounted on the fixed bed 9 of the base portion 4 so as to be movable in the front-rear direction (arrow F direction), the hair tip cutting body 5 described above, and the mounting table 14. A support stand 7 that is erected at the rear and fixedly supports the bearing portion 8 of the hair tip cutting body 5, a motor M1 installed at the front portion on the mounting base 14 via a base 16, and one end side of the bearing portion 8. It is provided with a dust collecting member 25 which is attached to and covers the rotary blades 42 group of the hair tip cutting body 5. The dust collecting member 25 is formed in a cylindrical shape having a blowout port 27 on the front side and a suction port 26 on the rear side.
The cutting body rotation drive unit 2 described above includes a motor M1, a drive pulley 18 fixed to the motor drive shaft 17 of the motor M1, and a driven pulley 20 fixed to the rotation shaft 19 on the other end side of the bearing portion 8. It is composed of a timing belt 21 hung between the drive pulley 18 and the driven pulley 20.

The above-mentioned moving mechanism 53 is attached to a bearing cylinder portion 11 provided on the front surface of the base portion 4, a male screw body 12 rotatably arranged in the fixed bed 9, and a front end of the male screw body 12. A manual handle 13 that rotates around C3 is intervened between the male screw portion of the male screw body 12 and the lower surface of the mounting table 14, and the mounting table 14 is rotated by the manual operation of the handle 13 to rotate the male screw body 12. It is composed of a power transmission mechanism 52 that moves in the front-rear direction. The power transmission mechanism 52 is composed of, for example, a female screw body or a gear group (not shown). The rail portions 10 and 10 projecting outward are formed at the left and right upper ends of the fixed bed 9 in the base portion 4. Sliders 15 and 15 attached to the left and right sides of the lower surface of the mounting table 14 of the moving body 40 are slidably engaged with these rail portions 10 and 10, and the moving body 40 is guided back and forth (in the direction of arrow F). It has become so.

Further, a roll base 28 for rotationally driving the brush roll 3 is erected at the rear portion of the fixed bed 9 of the base portion 4. A shaft support portion (not shown) that rotatably supports the rotary shaft 36 of the brush roll 3 is provided on the upper portion of the roll base 28, and the rotary shaft 36 is connected to the roll base 28 via a power transmission mechanism 29. It is connected to the motor drive shaft of the motor M2 inside. Further, the roll base 28 is provided with an operation unit 30 for manual input. By the manual input from the operation unit 30, the motor M2 is started, the rotation speed of the brush roll 3 is adjusted, and the brush roll 3 is moved in the left-right direction (arrow L direction).

As shown in FIG. 3, the hair tip cutting body 5 has, for example, three rotary blades 42, 42, 42 and a rotary blade 42, which have a shaft insertion hole 45 formed in the rotation center C4 of the blade body 48. For example, a gap 44 is formed between the rotary shaft 19 that is passed through the shaft insertion holes 45, 45, 45 of 42, 42 and the rotary blades 42, 42 that are inserted between the rotary blades 42, 42 and are adjacent to each other. A fixing member 24 composed of a flat washer 43, 43 and a nut or the like for detachably fixing the rotary blades 42, 42, 42 and the flat washer 43, 43 mounted on the rotary shaft 19 to one end 19A of the rotary shaft 19. And, it is composed of. A shaft insertion hole 46 through which the rotation shaft 19 is inserted is formed at the rotation center of each flat washer 43. That is, the rotary blades 42, 42, 42 are juxtaposed on the rotary shaft 19 along the axis C1 direction with gaps 44, 44, 44. In this case, the female screw portion formed on the fixing member 24 is screwed with the male screw portion formed on the rotary shaft 19, so that the rotary blades 42, 42, 42 and the flat washers 43, 43 rotate shafts. It is tightened and fixed to 19. Then, in the rotary shaft 19 of the hair tip cutting body 5, the central portion of the shaft is rotatably supported in the shaft hole of the bearing portion 8 around the axis C1, and the driven pulley 20 is provided at the other end side end portion. It is attached and fixed to prevent rotation.

On the other hand, as shown in FIG. 4, the rotary blade 42 is made of a cemented carbide grinding tooth 47, 47, 47, ...・ 30 pieces are formed at regular intervals in the circumferential direction. These grinding teeth 47, 47, 47, ... Are sharply formed so as to advance forward in the blade rotation direction (arrow R1 direction) of the rotary blade 42. Then, as shown in FIG. 4 (b), the tip 47AA of a certain grinding tooth 47 is formed so as to be pointed so as to project outward to the right in the blade rotation direction of the rotary blade 42. As shown in FIG. 4C, the tip 47AB of the next grinding tooth 47 rearward in the blade rotation direction is formed so as to protrude to the left outward in the blade rotation direction of the rotary blade 42. .. As such a rotary blade 42, a commercially available product for cutting gypsum board or wood, for example, a blade having an outer diameter of 100 mm, a blade thickness of 1.0 mm, and a tooth thickness of 1.1 mm can be used.

The brush roll 3 to be ground has the same configuration as that of the conventional technique, and as shown in FIG. 5, a large number of brush hairs 50, 50, 50, ... Are planted on the outer peripheral surface 37A of the rotary core material 37. There is. In this case, the brush bristles 50 are made of 6,6-nylon ™ containing 30 wt% of silicon carbide and have an outer diameter of 0.2 to 1.2 mmφ. A rotation shaft 36 having a rotation center C4 is provided on the center member 49 loaded in the hollow portion of the rotation core member 37. The rotation shaft 36 is positioned in the center member 49 by adjusting the chuck mechanism 51 so that its axis coincides with the rotation center C4. As described above, the rotary shaft 36 is connected to the motor drive shaft of the motor M2 via a power transmission mechanism 29 such as a gear.

The bristles cutting device 1 configured as described above is used for cutting and trimming the bristles 50A of the brush bristles 50 of the brush roll 3 for polishing a steel plate. First, the rotation shaft 36 of the brush roll 3 is attached to the bearing portion of the roll base 28 in the roll rotation drive portion 6 and connected to the power transmission mechanism 29. At this time, the hair tip cutting body 5 of the cutting body rotation driving unit 2 is separated from the brush roll 3.
Therefore, the motor M1 is started to rotate the hair tip cutting body 5 in the direction of the arrow R1 (counterclockwise in FIG. 1) at a high speed of, for example, about 5000 to 8000 rpm, and the motor M2 is started from the operation unit 30 to roll the brush. 3 is rotated in the direction of arrow R2 (clockwise in FIG. 1) at, for example, about 60 rpm. Subsequently, when the handle 13 is turned by hand (in the direction of arrow R3 in FIG. 2A), the rotation of the male screw body 12 is transmitted to the mounting table 14 via the power transmission mechanism 52, and the entire moving body 40 is moved backward. .. Among them, the bristles cutting body 5 approaches the brush roll 3, and the grinding teeth 47, 47, 47, ... Of the rotary blades 42 group are the bristles 50, 50, 50, .... , 50A, ... At this time, the grinding teeth 47, 47, 47, ... And the brush bristles 50, 50, 50, ... Are all running in parallel downward.
Then, the tips of a large number of forward-pointed grinding teeth 47, 47, 47, ... In the three rotary blades 42, 42, 42 are the brush bristles 50, 50, 50, ... Of the brush roll 3. Comb these at the tips of the hair 50A, 50A, 50A, .... At this time, the tips 47AA, 47AB of the grinding teeth 47, 47 adjacent to the tip 50A of the brush bristles 50 in the blade rotation direction alternately hit from the left and right. As a result, as shown in the circle G in FIG. 1, the brush roll 3 in which the tips 50A, 50A, 50A, ... Of the brush bristles 50, 50, 50, ... Are combed is obtained. ..

According to the hair tip cutting device 1 manufactured as described above, the hair tip cutting body 5 is rotationally driven by the cutting body rotation driving unit 2, and the brush roll 3 is rotated by the roll rotation driving unit 6 to drive the shaft of the hair tip cutting body 5. It is rotationally driven around the axial center C4 parallel to the center C1, and the hair tip cutting body 5 is slidably contacted with the brush bristles 50 of the brush roll 3 by the moving mechanism 53 while rotating. In this case, in the hair tip cutting body 5, the tips 47AA, 47AB of the grinding teeth 47, 47, 47, ... Of the plurality of rotary blades 42, 42, 42, ... Advance forward in the blade rotation direction. Since it is formed, the tips 47AA and 47AB of a large number of forward-pointed grinding teeth 47 surely catch the bristles 50A of the brush roll 3. Therefore, the bristles 50A of the brush bristles 50 can be efficiently cut, and the brush roll 3 can be finished into a uniform roll curved surface suitable for polishing a steel plate.

In particular, the tips 47AA and 47AB of the grinding teeth 47 and 47 adjacent to each other in the blade rotation direction are formed so as to be sharpened alternately on the left and right with respect to the blade rotation direction. The tips 47AA and 47AB of the plurality of grinding teeth 47 alternately hit the 50 hair tips 50A from the left and right. As a result, the hair tips on the side facing the rotary blade 42 of the hair tip cutting body 5 are mainly combed. As a result, as shown enlarged in the circle G of FIG. 1, when viewed in the direction of the rotation center C4, only the side surface on the upstream side in the rotation direction (arrow R2 direction) of the brush roll 3 is combed in a tapered shape. A brush bristles 50 having a specific bristles 50A can be obtained. The brush roll 3 having the brush bristles 50 having the bristles 50A was extremely suitable for polishing to obtain a beautiful steel plate surface.

Then, in the hair tip cutting body 5, the worn rotary blade 42 and the flat washer 43 can be removed from the rotary shaft 19 by releasing the fixing member 24. After that, the new rotary blade 42 and the flat washer 43 can be fixed to the rotary shaft 19 by mounting the new rotary blade 42 and the flat washer 43 on the rotary shaft 19 and tightening the fixing member 24. That is, it can be replaced with a rotary blade 42 having sharp grinding teeth 47 very easily and in an extremely short time only by operating the fixing member. Further, since the rotary blade 42 having a structure similar to that described above can be obtained as a substitute for an inexpensive commercially available product, it does not take much time and effort to replace the parts, and the cost of the replacement parts can be low. By the way, since the above-mentioned commercially available rotary blade 42 can be obtained for about 1000 yen per sheet, the total cost of the three rotary blades 42, the two flat washers 43, and the replacement wage is less than 10,000 yen. However, the replacement time will be significantly shorter, about 3 minutes. Further, since the rotary blade 42 used for woodworking has relatively little wear of the grinding teeth 47, it can be reused for the hair tip cutting body 5 thereafter. In that case, the component cost becomes even lower.

In the above embodiment, the tips 47AA and 47AB of the grinding teeth 47 and 47 adjacent to each other in the blade rotation direction are formed so as to project outward from the left and right alternately with respect to the blade rotation direction. The hair tip trimmer of the present invention is not limited thereto. For example, as shown in FIG. 4D, the present invention also comprises a configuration using a rotary blade having a tip 47AC which is advanced forward in the blade rotation direction but is not sharpened alternately to the left and right with respect to the blade rotation direction. included. Even with such a configuration, it was possible to obtain a brush bristles 50 close to the bristles 50A as shown in the circle G in FIG. 1, and the polishing performance on the surface of the steel sheet was sufficient. However, the polishing performance is somewhat inferior to the case where the rotary blade 42 having the tips 47AA and 47AB shown in FIGS. 4 (b) and 4 (c) is used.

In the above, in order to facilitate the understanding of the invention, three rotary blades are exemplified as the number of rotary blades attached to the rotary shaft, but the number of rotary blades attached to the rotary shaft in the present invention is not limited to three. It may be two or four or more. The number thereof may be appropriately selected according to the capacity of the drive source used and the required processing capacity.

On the other hand, as a comparative example, an example using a rotary blade formed by coating the surface of the grinding tooth 47 with a diamond particle film by a chemical vapor deposition method or the like is shown. The three rotary blades and the two flat washers 43 for the gap 44 were attached to the rotary shaft 19 and fixed by the fixing member 24 to obtain a hair tip trimmer. The hair tip cutting body of this comparative example was used for the hair tip cutting device 1 instead of the hair tip cutting body 5, and the brush hair 50 of the brush roll 3 was trimmed. At this time, the tip of the brush bristles 50 did not have the shape of the bristles 50A enlarged in the circle G of FIG. 1, and the individual bristles had variations. When the surface of the steel sheet was polished using the brush roll 3 having the hair adjusted in this way, irregular vibration was generated in the brush roll 3 and a mottled pattern was generated on the surface of the steel sheet.

The present invention described above is not limited to the above-described embodiment. That is, even if there is a design change within the range that does not deviate from the gist of the present invention, including various modifications and modifications that can be conceived by a person having ordinary knowledge in the field of the present invention, it is not included in the present invention. Needless to say.

1 Hair tip cutting device 2 Cutting body rotation drive part 3 Brush roll 4 Base part 5 Hair tip cutting body 6 Roll rotation drive part 19 Rotating shaft 24 Fixing member 40 Moving body 42 Rotating blade 43 Flat washer 44 Gap 45 Shaft insertion hole 46 Shaft insertion hole 47 Grinding teeth 47AA, 47AB, 47AC Tip 48 Blade body 50 Brush bristles 50A Bristles 53 Movement mechanism C1 Axis center C4 Rotation center F Arrow R1 Arrow

Claims (4)

A hair tip trimmer used to trim and trim the brush hair tips of a brush roll for polishing steel plates.
It is equipped with a plurality of rotary blades having a plurality of grinding teeth in the circumferential direction on the outer peripheral portion of the disk-shaped blade body, and a rotary shaft to which the plurality of rotary blades are attached with a gap in the axial direction. A hair tip cutting body, characterized in that the tips of the grinding teeth of the plurality of rotary blades are formed so as to advance forward in the blade rotation direction. The hair tip cutting body according to claim 1, wherein the tips of the grinding teeth adjacent to each other in the blade rotation direction are formed so as to be sharpened alternately on the left and right sides in the blade rotation direction. A plurality of rotary blades having a shaft insertion hole formed at the center of rotation of the blade body, and
A rotary shaft that is passed through and rotationally driven through the shaft insertion holes of the plurality of rotary blades,
A flat washer that is mounted on the rotary shaft between adjacent rotary blades and forms the gap between the rotary blades.
A fixing member for detachably fixing the plurality of rotary blades and the flat washers mounted on the rotary shaft to the rotary shaft,
The hair tip cutting body according to claim 1 or 2, wherein the hair cutting body is made of. The hair-cutting body according to any one of claims 1 to 3,
The cutting body rotation driving unit that rotationally drives the hair tip cutting body,
A roll rotation drive unit that rotationally drives a brush roll for polishing a steel plate around an axis parallel to the axis of the hair tip cutting body, and a roll rotation drive unit.
A moving mechanism that causes the rotating bristles to be moved closer to each other with respect to the brush bristles of the rotating brush roll.
A hair tip trimming device characterized by being equipped with.

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