JP2011131356A - Rotary polishing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary polishing tool that inhibits parts from being discarded when a polishing wheel is discarded. <P>SOLUTION: In the rotary polishing tool, each polishing wheel 2 includes: a polishing paper 3; and an annular retaining part 4 that retains the polishing paper 3, and is held so as not to rotate with respect to a boss part 1. The retaining part 4 includes: a front disposing part; a rear disposing part; and one or more coupling part. In the base part side of the radial polishing paper, wherein the axial directions of the boss part 1 are defined front and rear directions, the front disposing part is disposed in the front of the polishing paper 3, the rear disposing part is disposed in the rear of the polishing paper 3, and both disposing parts hold the polishing paper therebetween, while the coupling part connects the polishing paper 3 to one or both of the front and rear disposing parts. When discarding the polishing wheel, the rotary polishing tool releases the connection with the coupling part to separate the front and rear disposing parts from the polishing paper 3, whereby the front and rear disposing parts are reused. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rotary polishing tool.

As a rotary polishing tool, a polishing wheel provided with a plurality of strip-shaped sandpaper (polishing paper) arranged radially and a disc-shaped holding portion for holding the sandpaper is mounted on the outer peripheral surface of the boss portion. Various proposals have been made in which a plurality of bosses are arranged in the axial direction (Patent Documents 1 to 4).
The holding portion holds the central portion of the radial sandpaper group and is formed in an annular shape so that the boss portion is passed through the center.
These have been improved for the purpose of manufacturing convenience, ease of disposal, and efficient polishing.
Specifically, in the polishing wheel shown in Patent Document 1, as shown in FIGS. 2 and 4, it is arranged before and after the polishing cloth piece 2 as a holding part for holding the central part of the radial polishing cloth piece 2. The holding ring 3 and the auxiliary ring are shown, and both the rings are integrally formed with an adhesive or the like. The abrasive cloth piece 2 is attached to the binding piece 5 with respect to the ring. (Paragraphs 0018 and 0019).
In the polishing tool shown in Patent Document 2, the abrasive paper is cut and folded in two in FIGS. 2 and 6, and in FIG. 7 of Patent Document 2, the polishing wheel is overlapped as a conventional example. Is seen. 2, FIG. 6 and FIG. 7 of Patent Document 2 are all fixed to a rotating shaft (4 in FIG. 6) and an annular plate (2 in FIG. 7) by an adhesive. .
In Patent Document 3, as a rotary polishing tool, polishing paper is radially arranged around the holding disk 4 and held in a state where a plurality of tooth-shaped ridges 41 provided around the holding disk 4 bit the polishing paper. is doing.

Japanese Patent Application Laid-Open No. 2001-79776 Japanese Utility Model Publication No. 2-145963 JP 54-11111 A

On the other hand, due to environmental considerations, there is a growing momentum to reduce waste throughout the industry.
However, although some considerations have been given to provide a part suitable for incineration of some of the above rotating abrasive tools, the viewpoint of reducing waste is poor, and when the sandpaper is consumed, the entire grinding wheel is discarded. It was.

That is, the holding part that does not come into contact with the object to be polished is also integrated with the sandpaper by bonding with the sandpaper with an adhesive or by wrinkling the sandpaper as described above. It was not separable, but was discarded with worn sandpaper.
Therefore, in view of the above-mentioned momentum for reducing waste, the present invention is intended to provide a specific means for reducing waste when the grinding wheel is discarded in the rotary polishing tool. is there.

In the first invention of the present application, in the rotary polishing tool in which a plurality of polishing wheels in which the polishing paper is radially arranged are arranged in the axial direction of the boss portion, each of the polishing wheels holds the polishing paper and the polishing paper. And an annular holding portion fixed to the boss portion so as not to rotate. The holding portion includes a front arrangement portion, a rear arrangement portion, and one or a plurality of coupling portions, and is arranged radially. On the base side of the polished paper, the front arrangement part is arranged in front of the abrasive paper, with the axial direction of the boss part being the front-rear direction, the rear arrangement part is arranged behind the abrasive paper, The coupling part is for coupling the abrasive paper to at least one of the front arrangement part and the rear arrangement part, and when the polishing wheel is discarded, Separate the placement section and the rear placement section and remove the front placement section and the rear placement section from the abrasive paper. Thus, a rotary polishing tool that can be reused is provided.
In the second invention of the present application, in the first invention of the present application, the coupling portion is configured to couple the abrasive paper to both the arrangement portions at a position between the front arrangement portion and the rear arrangement portion of the abrasive paper. A key groove extending along the axial direction of the boss portion is provided on the outer peripheral surface of the boss portion, and a key portion protruding inward from the inner peripheral surface of the holding portion is provided on the holding portion. The holding portion is fixed to the boss portion so as not to rotate, and the key portion includes a locking portion provided in the front placement portion and a locked portion provided in the rear placement portion. By locking the locked portion to the locking portion, the front arrangement portion and the rear arrangement portion are locked inside the position where the abrasive paper is sandwiched in the inner and outer directions of the diameter of the holding portion. A rotary polishing tool is provided.
According to a third invention of the present application, in the first or second invention of the present application, an annular spacer that holds an interval between adjacent polishing wheels is attached to the boss part, and the spacer is a reuse part together with the holding part. A rotary polishing tool is provided that is reused as:

In each of the first to third inventions of the present application, the polishing wheel having a plurality of radially arranged polishing papers is in a rotary polishing tool arranged in a plurality in the axial direction of the boss portion, and is discarded when the polishing wheel is discarded. Reduced things.
In particular, the holding part for fixing the abrasive paper to the boss part can be separated from the abrasive paper and can be reused to suppress the generation of waste. Specifically, the holding portion can be easily removed from the abrasive paper by removing the coupling portion and separating the two arrangement portions of the front arrangement portion and the rear arrangement portion. In other words, unlike conventional papers that cannot be separated by bonding or biting the holding part, when disposing of the grinding wheel, the connecting part is removed and the arrangement parts before and after sandwiching the abrasive paper are separated from each other. In addition, the holding part can be separated from the abrasive paper, and the reuse of the holding part is facilitated.
In the second invention of the present application, the front arrangement portion and the rear arrangement portion of the holding portion are locked to the key portion that is fixed to the key portion of the boss portion so that the holding portion cannot be rotated with respect to the boss portion. By providing the engaging portion to be fixed, the front placement portion and the rear placement portion are fixed to each other at different locations in the inner and outer directions of the holding portion, and the coupling between the front placement portion and the rear placement portion is made more reliable. At the time of manufacture, the locking portion is locked, whereby the polishing paper 3 can be positioned with respect to the front arrangement portion 41, the rear arrangement portion 42, and both arrangement portions, and the connection by the connecting portion 5 is facilitated.
Further, as described above, by forming such a locking portion in the means (key portion) for fixing the holding portion and the boss portion, a space for separately forming the locking portion is not required, and space is saved. Excellent.
Furthermore, at the time of disposal, it is easy to separate the front placement portion and the rear placement portion and the two placement portions from the abrasive paper by releasing the connection portion and releasing the engagement portion. Yes.
In the third invention of the present application, the generated waste is further reduced by making the spacers disposed between the grinding wheels reusable.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall side view of a rotary polishing tool according to an embodiment of the present invention. FIG. 2 is a front view of a state in which a part (end cap and clasp) of the rotary polishing tool shown in FIG. 1 is removed. FIG. 3 is a perspective view showing a state during assembly (disassembled state) of the rotary polishing tool of FIG. 4 (A) and 4 (B) are perspective views showing a main part of a polishing manufacturing process used in the rotary polishing tool. FIG. 5 is an exploded perspective view of the polishing wheel of the rotary polishing tool. FIG. 6 is a front view of the grinding wheel shown in FIG. 5 after assembly. FIG. 7 is an end view taken along line XX of FIG. FIG. 8 is a YY end view of FIG.
For convenience of explanation, F in the figure indicates the front in the direction in which the shaft of the rotary polishing tool (boss portion 1) extends, and B indicates the rear in the direction in which the shaft of the rotary polishing tool (boss portion 1) extends.
In FIGS. 7 and 8, hatching is omitted in order to avoid complexity of the drawings.

As shown in FIG. 1, the rotary polishing tool includes a boss portion 1, a plurality of polishing wheels 2, 2, spacers 7, 7, clasps 8, 8, and end caps 9, 9.
Hereinafter, the structure of each part is demonstrated in order.

As shown in FIG. 3, the boss 1 is formed in a drum shape, and is provided on the outer peripheral surface of the through hole 10 to which the rotating shaft (not shown) is attached, the sub through holes 11. Key grooves 12... 12 extending along the axial direction of the boss 1 are provided.
The through holes 10 and the sub through holes 11... 11 penetrate from the front end of the boss portion 1 to the rear end. In the front view of the boss part 1, the through hole 10 is located at the axial center of the boss part 1, and each of the sub through holes 11... 11 is provided so as to surround the through hole 10.
In this embodiment, the boss portion 11 is made of plastic.
The sub through holes 11... 11 are provided to reduce the weight and reduce the amount of material used. In particular, the sub through holes 11.

As shown in FIGS. 3 and 6, each of the polishing wheels 2... 2 includes a plurality of strip-like polishing papers 3, 3, a holding unit 4, and a coupling unit 5.
The plurality of abrasive papers 3 ... 3 are arranged radially. The individual abrasive papers 3 ... 3 may be arranged separately from each other in a radial pattern, but the base ends of adjacent abrasive papers are connected and integrated. Also good.
In this embodiment, an example in which the base ends of the adjacent abrasive papers 3 ... 3 are connected to each other is illustrated. Specifically, as shown in FIG. 4A, a rectangular piece of abrasive paper (hereinafter referred to as an abrasive sheet 30) before being divided into a plurality of strip-like abrasive papers 3 ... 3 is prepared. The rectangular polishing sheet 30 is formed by inserting a plurality of cuts 31... 31 and folding the rectangular polishing sheet 30 in two. The cuts 31 and 31 on opposite sides are provided at positions where they overlap each other by folding. In the above, an adhesive is applied to the surface of the polishing sheet 30 that is folded and overlapped, and both surfaces are fixed by folding. When folding, a string-like body 32 serving as a core is inserted inside the fold.
As shown in FIG. 4B, the abrasive paper 3 formed in the above-mentioned cuts 31 and 31 in a strip shape, ie, a narrow width, is integrated with the opposite side abrasive paper 3 by the above-mentioned adhesion. Is done. Then, by connecting both ends of the string-like portion 32 to form a ring, the base end side where the adjacent abrasive papers 3 and 3 are connected is formed around the portion where the cut 31 of the polishing sheet 30 is not formed. As the center, the leading ends of the adjacent abrasive papers 3... 3 are spread radially. In this way, as shown in FIG. 5, one abrasive sheet 30 is formed as an annular body in which a plurality of strip-like abrasive papers 3... 3 are radially arranged.

The holding | maintenance part 4 is provided with the front arrangement | positioning part 41, the rear arrangement | positioning part 42, and several coupling | bond part 5 ... 5 as shown to FIGS. On the base side of the radial abrasive paper, that is, on the center side of the annularly formed abrasive sheet, the front arrangement portion 41 is arranged in front of the abrasive paper 3 (front F side), and the rear arrangement portion 42 is polished. Arranged behind the paper 3 (rear B side), the two arrangement portions 41 and 42 are fixed to the polishing paper 3 by the coupling portions 5.
As shown in FIG. 7, the coupling portions 5... 5 penetrate the both placement portions 41, 42 and the polishing paper 3 at the positions where the polishing paper 3 of the front placement portion 41 and the rear placement portion 42 are overlapped. Join the three.
Specifically, both the placement portions 41 and 42 include a sandwiching portion a that sandwiches the polishing paper 3 and a non-pinch portion b that does not sandwich the polishing paper b. The non-clamping part b is located inside the clamping part a.
Therefore, the above-described coupling portions 5... 5 are provided in the sandwiching portion a of both the placement portions 41 and 42.
In this embodiment, the front arrangement portion 41 and the rear arrangement portion 42 are each formed of plastic, and each of the coupling portions 5... 5 includes both the arrangement portions 41 and 42 and the polishing paper 3. A staple that can be pierced and joined.
As shown in FIG. 6, it is preferable that each of the coupling portions 5... 5 be provided at equal intervals in the circumferential direction r of the holding portion 4 in a front view of the polishing tool. Further, in the front view of the polishing tool, each of the coupling portions 5... 5 is preferably provided so as to be positioned between the locking portions 40. However, it is not limited to such an arrangement. Further, the number of coupling portions 5 is not limited to four as illustrated, and may be three or less or five or more.
The connecting portions 5... 5 only need to stop the abrasive paper 3... 3 from being separated in the radially outward direction of the boss portion 1 by high-speed rotation of the polishing tool, and penetrate the abrasive paper. There is no need. For example, it is arranged between the adjacent strip-shaped polishing papers 3 and 3 and hits the portion where the base ends of the polishing papers 3 and 3 are connected, and the movement of the polishing papers 3 and 3 in the radial direction of the boss part 1 is made. It can be pressed. In this case, the coupling portions 5... 5 also stop the rotation of the abrasive paper 3 from coming into contact with the object to be polished and receiving the force from the object to be polished and separating in the direction along the rotation direction. .
However, a separate holding means such as a protrusion for holding the abrasive paper to be separated by receiving a force along the rotation direction by contact with the object to be polished is provided separately from the coupling portions 5. It may be implemented.

As shown in FIG.5 and FIG.6, each of the front arrangement | positioning part 41 and the rear arrangement | positioning part 42 is an annular member which can let the boss | hub part 1 pass to the center. Each of the front arrangement part 41 and the rear arrangement part 42 includes a plurality of key components 43... 43, 44... 44 that protrude from the inner peripheral surface toward the center of the arrangement part in a front view.
In this embodiment, in each of the arrangement portions, four key components are provided, respectively, and in front view, the positions of the key components 43... 43 of the front arrangement portion 41 and the key components 44 of the rear arrangement portion 42. ... matches the position of 44. In this embodiment, the four key constituent parts of each arrangement part are arranged at equal intervals in the circumferential direction r (FIG. 6) of the holding part 4. However, the key components may be implemented without being arranged at equal intervals, and the number of the key components is not limited to four, but may be three or less or five or more.
The key components 43... 43, 44... 44 of both arrangement parts 41 and 42 are provided with a locking part 40 that locks both arrangement parts 41 and 42 and engage with the key grooves 12. The key part 6 (FIGS. 2 and 3) is configured.

Both arrangement parts will be described more specifically.
As shown in FIG. 5, each key component 43 of the front arrangement portion 41 includes a hole 45 penetrating the key component 43 in the front-rear direction as a receiving portion, and further forwards so that the inner peripheral surface extends forward F. A rising portion 47 is provided to rise. The upright portion 47 is formed in a sleeve shape on the front surface of the front arrangement portion 41, but is not provided at a position where the key components 44... 44 are provided.
Each key component 44 of the rear arrangement portion 42 includes a protrusion 46 that protrudes forward toward the hole 45 (receiving portion). The outer diameter of the tip of the protrusion 46 is larger than the inner diameter of the hole 43.
The receiving portion, that is, the hole 45 and the protrusion 46 constitute a locking portion 40 that locks both the arrangement portions 41 and 42 with each other.

Each of the annular front arrangement portion 41 and rear arrangement portion 42 is overlapped with the abrasive paper 3 sandwiched therebetween. At this time, by aligning the inner peripheral surface of the annular abrasive paper group (abrasive sheet) with the outer peripheral surface of the upright portion 47, the polishing paper 3 and the arrangement portion can be aligned (FIGS. 2, 5, and 7). ). Then, as shown in FIG. 8, the projections 46 of the key components 44... 44 of the rear arrangement part 42 are forcibly fitted into the holes 45.
Thus, the front arrangement portion 41 and the rear arrangement portion 42 are locked, and the polishing paper 3 is temporarily fixed to both the arrangement portions 41 and 42.
With this temporary fixing, the abrasive paper 3 is sandwiched between the rear surface of the front arrangement portion 41 arranged in front of the abrasive paper 3 and the front surface of the rear arrangement portion 42 arranged after the abrasive paper 3, and the rear arrangement portion The inner side of the annular abrasive paper 3 is covered by the upright portion 47 of 42. In addition, the upright part 47 is provided in the front arrangement | positioning part 41 contrary to the above, and it can implement as rising to back B.
By the temporary fixing described above, the polishing paper 3 can be positioned with respect to the front placement portion 41, the rear placement portion 42, and both placement portions, and the joining by the joining portion 5 is facilitated.
As long as the protrusion 46 can be forcibly fitted to the hole 45, as described above, the protrusion 46 is not limited to the formation of the outer diameter on the distal end side, and the direction intersecting the axial direction of the holding portion 4. It is also possible to provide a reverse hook part protruding in the hole 45, and after the insertion into the hole 45, the reverse hook part may be hooked and locked by the key component 41 (not shown). It can also be implemented as a measure.

As shown in FIG. 2, by inserting the key portion 6 into the key groove 12 of the boss portion 1, the polishing wheel 2 can be fixed to the boss portion 1 so as not to rotate.
A plurality of polishing wheels 2... 2 are attached to the boss portion 1 in an overlapping manner. In this embodiment, the polishing surface of the polishing paper 3 faces the front-rear direction (F, B). In the axial direction, it is not preferable that the abrasive becomes too dense between adjacent holes. In this regard, as shown in FIGS. 1 and 3, it is preferable to attach the annular spacer 7 to the boss portion 1 alternately with the wheels in order to appropriately maintain the distance between the wheels.
In this embodiment, the spacer 7 is formed of foamed polystyrene for weight reduction, but can also be formed of other materials such as other plastics, metals, ceramics, or wood.
After the grinding wheels 2... 2 and the spacers 7... 7 are attached, the clasps 8 are attached to both ends of the boss 1, and the end caps 9, 9 are attached to the clasps 8, 8. Is attached.
The clasps 8 and 8 are annular plate-like bodies, and are provided with small holes 81... 81 and sub small holes 82. The clasps 8 and 8 are fixed to the boss portion 1 by known fixtures 80... 80 such as screws, pins and bolts. The boss portion 1 is provided with mounting holes 13 for attaching the fixture. The fixtures 80... 80 are passed through the small holes 81... 81 and attached to the mounting holes 13.
The end caps 9, 9 are provided with positioning projections 91... 91 on the surface overlapping the clasps 8, 8, and after being fitted into the sub-holes 82. Are fixed to each of the clasps 8 and 8 fixed to the boss portion 1 by a known fixing means (not shown).
The fixing of the clasps 8 and 8 and the end caps 9 and 9 to the boss 1 is not limited to the above, and can be performed by other known methods.

When discarding the polishing wheel 2 of the rotary polishing tool formed as described above, first, the end caps 9 and 9 and the clasps 8 and 8 are removed from both ends of the boss portion 1. Then, the key portions 6... 6 of each polishing wheel 2 are removed from the key grooves 12... 12 of the boss portion 1, and the polishing wheels 2. With respect to the polishing wheel 2 removed from the boss portion 1, the front arrangement portion 41 and the rear arrangement portion 42 are separated by removing the staples as the couplers 5 ... 5 and removing the projections 46 ... 46 from the holes 45 ... 45. Meanwhile, the abrasive paper 3 can be removed from both the placement portions 41 and 42. In this way, the two placement portions 41 and 42 can be collected by being separated from the discarded abrasive paper 3 and reused as a reuse portion.
Also, the spacer 7 can be reused as a reusable part together with the both placement parts 41 and 42 by adopting a material that can withstand long-term use.

In this embodiment, the four polishing wheels 2... 2 and the four spacers 7... 7 are alternately attached to the boss portion 1 as shown in FIG. The number of 2 and the number of spacers 7 ... 7 can be changed.
In the above embodiment, the boss 1 is made of plastic, but can be made of metal, ceramic, wood, or the like. However, from the viewpoint of ease of molding, it is preferable to form the boss portion 1 with plastic or metal.
In the above embodiment, the key groove is provided in the boss portion 1 and the key portion is provided in the holding portion. However, the key portion is provided in the boss portion 1 and the key groove is provided in the holding portion. Can also be implemented.
Moreover, although said front arrangement | positioning part 41 and said rear arrangement | positioning part 42 shall also be formed with a plastics, if it can be reused as a reuse part, it will not be limited to said plastic, It is also possible to form with other members, such as a metal, a ceramic, and a timber, In that case, the coupling | bond part 5 ... 5 can be implemented using well-known fixing tools, such as a screw other than a staple, and a pin. Further, the connecting portions 5... 5 need only be able to be removed from the abrasive paper at the time of disposal, and are implemented as protrusions and receiving portions provided in the front placement portion 41 and the rear placement portion 42 as well as the locking portion. it can.
The locking portions 40 of the both placement portions 41 and 42 are provided in the key portion 6, but can also be implemented as those provided at other positions.
That is, the locking part 40 is not limited to that provided in the key part 6 as long as it is provided in the non-clamping part b of both the arrangement parts 41 and 42.
For example, although not shown in the drawings, both annular placement portions 41 and 42 each include the annular sandwiching portion a and the same annular non- sandwiching portion b continuously provided inside the sandwiching portion a. The above-described upright portion 47 is assumed to be located at the boundary between the sandwiching part a and the non-clamping part b, and the above-described engaging parts 40... 40 can be provided on the non-clamping part b. In this case, the key portions 6... 6 (key constituent portions 43... 43, 44... 44) may be provided inside the annular non-clamping portion b.
In the above description, the coupling part 5 is provided in the clamping part a, and the locking part 40 is provided in the non-clamping part b separately from the coupling part 5, but the coupling part 5 is not provided with such a locking part 40. It is good also as what only provides. In this case, it is good also as what comprises the coupling | bond part 5 with the protrusion and receiving part similar to the latching | locking part 40 as above-mentioned.
However, in the case of such a configuration, it is necessary to provide a hole through which the protrusion is passed through the polishing paper 3 in advance during manufacture and to align the position with the hole and pass the protrusion. This alignment operation between the abrasive paper and the placement portion needs to be carried out in a groping state at a position (the sandwiching portion a) covered with both placement portions, and is troublesome. For this reason, as described above, the locking portions 40... 40 are provided on the non-clamping portion b, which is relatively easy to align, and both the placement portions 41 and 42 are temporarily fixed, so that it is not necessary to align the holes and the protrusions. It is not time-consuming to combine both the placement units 41 and 42 and the abrasive paper 3 with the staple as the coupling unit 5.

In the rotary polishing tool shown in FIGS. 1 to 8, the boss 1 is formed as a single cylindrical body, and all the polishing wheels 2... 2 are attached to the single cylindrical body. . In addition, the boss portion 1 is constituted by a plurality of cylindrical units 100... 100, and the units 100 shown in FIG. 9 are connected to form a single cylindrical body. it can. FIG. 9 is a perspective view showing one disassembled state of the unit 100.
As shown in FIG. 9, a key groove 12 for fitting the key portion 6 of the holding portion 4 of the polishing wheel 2 is provided on the outer peripheral surface of each unit 100, and the plurality of polishing wheels 2. Each is distributed and attached. A retaining plate 8 similar to that shown in FIG. 3 and attached to one end of each unit 100 is attached. The clasp 8 includes small holes 81... 81 and sub small holes 82... 82 and is attached to the end face of each unit 100 by attaching the fixtures 80. The other end of each unit 100 is provided with a flange 90 as a stopper for removing the polishing wheel 2. Positioning projections 91... 91 similar to those provided in the cap 9 shown in FIG. 3 are provided on the end surface of the unit 100 where the collar 90 is provided. The positioning protrusions 91... 91 are fitted in the sub small holes 82... 82 of the other unit 100 and serve as a detent between adjacent units 100.
In the embodiment shown in FIG. 9, items not particularly mentioned are the same as those in the embodiment shown in FIGS.

The whole side view of the rotary polishing tool which concerns on one embodiment of this invention. FIG. 2 is a front view of the rotary polishing tool with a part of FIG. 1 removed. The perspective view which shows the state (disassembly state) in the middle of the assembly of the rotary polishing tool of FIG. (A) And (B) is a principal part perspective view which shows the manufacture process of grinding | polishing used for the said rotary grinder. The disassembled perspective view of the grinding | polishing wheel of the said rotary grinding | polishing tool. The front view of the grinding | polishing wheel shown in FIG. 5 after an assembly. XX end view of FIG. FIG. 7 is a YY end view of FIG. 6. The disassembled perspective view which shows other embodiment of a boss | hub part.

DESCRIPTION OF SYMBOLS 1 Boss part 2 Polishing wheel 3 Polishing paper 4 Holding part 5 Coupling part 6 Key part 12 Keyway

Claims (3)

In a rotating polishing tool in which a plurality of strip-shaped polishing papers arranged radially are arranged in the axial direction of the boss part,
Each of the polishing wheels is composed of the above-mentioned polishing paper and an annular holding portion that holds the polishing paper and is fixed to the boss portion so as not to rotate.
The holding portion includes a front placement portion, a rear placement portion, and one or more coupling portions,
On the base side of the radially arranged abrasive paper, the front arrangement part is arranged in front of the abrasive paper, with the axial direction of the boss part being the front-rear direction, the rear arrangement part is arranged behind the abrasive paper, And put abrasive paper in between
The coupling part is for coupling the abrasive paper to one or both of the front arrangement part and the rear arrangement part,
A rotary polishing tool that releases the above-described coupling by the coupling portion when the grinding wheel is discarded, separates the front arrangement portion and the rear arrangement portion, and removes the front arrangement portion and the rear arrangement portion from the abrasive paper so that they can be reused. The coupling part is for coupling the abrasive paper to both arrangement parts at a position sandwiched between the front arrangement part and the rear arrangement part of the abrasive paper,
A key groove extending along the axial direction of the boss part is provided on the outer peripheral surface of the boss part, and a key part protruding inward from the inner peripheral surface of the holding part is provided on the holding part, and the key part is inserted into the key groove. By inserting, the holding part is fixed to the boss part so as not to rotate,
The key portion includes a locking portion provided in the front placement portion and a locked portion provided in the rear placement portion,
By locking the locked portion to the locking portion, the front arrangement portion and the rear arrangement portion are locked inside the position where the abrasive paper is sandwiched in the inner and outer directions of the diameter of the holding portion. The rotary polishing tool according to claim 1.   3. An annular spacer that holds an interval between adjacent polishing wheels is attached to a boss portion, and the spacer is reused as a reuse portion together with the holding portion. Rotating abrasive tool according to crab.

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