WO2001036157A1

WO2001036157A1 - Member for attaching rotary cutting element to electrically powered tools or the like and rotary cutting tool having same attaching member attached thereto

Info

Publication number: WO2001036157A1
Application number: PCT/JP2000/007945
Authority: WO
Inventors: Kouichi Suzuki
Original assignee: Sankyo Diamond Industrial Co., Ltd.
Priority date: 1999-11-12
Filing date: 2000-11-10
Publication date: 2001-05-25
Also published as: KR100628802B1; KR20010093126A; JP4707913B2

Abstract

An attaching member, which is attached to a rotary cutting element (8) having an attaching hole in the center of a disk and adapted to be removably threadedly attached to the rotary shaft of an electrically powered tool or the like, comprising an outer flange (1) which functions as a nut, and a box nut-like ring (6) having a flange end surface adapted to hold the rotary cutting element (8) between itself and the flange back surface of the outer flange (1) so as to fix it as a unit, wherein when attached to the rotary cutting element (8), the attaching member fixes the outer flange (1), the rotary cutting element (8) and the box nut-like ring (6) as a unit through an O-ring (9) installed in the cylindrical portion of the outer flange (1). The use of the attaching member for the rotary cutting element (8) is suitable for grinding concrete, stone or the like while preventing the roun out otherwise brought about by the allowable error between the rotary shaft of the electrically powered tool and the attaching member.

Description

Description: A mounting member for a rotary blade to an electric tool or the like, and a rotary blade having the mounting member attached thereto

The present invention relates to a diamond wheel or a diamond wheel having a super-abrasive grindstone portion mainly composed of diamond abrasive grains or cBN (cubic boron nitride) abrasive grains formed on an outer peripheral portion of a circular or rolled substrate. The present invention relates to a mounting member for efficiently attaching and detaching a rotary blade such as a diamond blade to a rotary shaft of an electric tool or the like, and a rotary blade provided with the mounting member. Background art

Wide range of rotary blades such as diamond blades and diamond cup wheels for cutting, grinding and polishing of hard and brittle materials such as concrete and stone, ceramic materials such as tiles and tiles, and synthetic rubber, synthetic resin, and metal. It is used for These so-called rotary blades usually form a super-abrasive grindstone portion mainly composed of diamond abrasive grains or cBN abrasive grains on the outer periphery of a circular substrate made of steel, and a power tool or the like is provided at the center of the circular substrate. A mounting hole is provided for mounting the power tool on the rotating shaft of the power tool via a mounting jig, such as the inner flange and outer flange provided with the power tool. Grinding and polishing using the rotating energy of the power tool It is used for such work.

Conventionally, as shown in Fig. 13, the rotary blade is attached to the power tool by passing the rotary shaft 101 of the power tool through the inner flange 102 attached to the power tool, and then turning the rotary tool 103 Through the mounting holes of the The outer flange 104 is screwed and attached to the power tool so that the rotating blade 103 is held between the inner flange 102 and the outer flange 104.

In the above-mentioned conventional technology, mounting to the power tool is performed using the flange member, which is a mounting jig attached to the power tool. However, a slight tolerance was recognized, and as a result, a slight center run-out occurred between the main shaft of the power tool and the rotary cutting tool. Therefore, the grinding action surface of the rotary cutting tool does not smoothly contact the work area of the work material, and the work area is hit, so-called hitting phenomenon occurs. There were inconveniences that the service life of the rotary blade tool was shortened and the machining accuracy was reduced.

In addition, when the work material is different or the machining operation is changed, it is necessary to replace the rotary tool with an appropriate one.In that case, after removing the outer flange from the main spindle of the power tool, However, since the operation of replacing the rotary blade is repeated, it is time-consuming, and the flange member and the mounting tool may be lost. Therefore, it is desirable that each of the rotary blades has a structure in which a flange member is substantially attached to the rotary blade. Recently, such rotary blades have been developed, and some of them have appeared on the market.

However, in order to attach a flange member to each rotary blade and to have a structure that can be attached to different types of electric tools with high accuracy, the number of parts increased in design and the cost had to be increased. In addition, the tools used for attaching and detaching the rotary blade to and from the electric tool are limited to special wrench or wrench.If the tool is lost or the engaging hole of the flange member is damaged, it cannot be removed. There was a fear of falling.

Therefore, the main object of the present invention is to use a diamond blade or diamond A mounting member for mounting a rotary blade such as a cup wheel to a power tool, the mounting member being integrally attached to the rotary blade individually, and being easily and accurately attached to and detached from the power tool, and the mounting member. An object of the present invention is to provide a low-cost rotary cutting tool having a mounting.

Another object of the present invention is that the flange portion of the outer flange functioning as a nut of the mounting member is designed to be compatible with a plurality of tools when attaching / detaching to / from a power tool. Accordingly, an object of the present invention is to provide a rotary blade that can be easily attached and detached with a general-purpose tool such as a monkey spanner.

Another object of the present invention is to minimize vibration and noise caused by intense contact between the grindstone surface of a rotary cutting tool and a work material in a grinding operation using, for example, a power wheel. The aim is to eliminate discomfort, improve the working environment, and promote processing accuracy. Disclosure of the invention

The mounting member of the rotary blade tool according to the present invention is a mounting member that is mounted on a rotary blade tool such as a diamond blade having a mounting hole in the center of a circular substrate and is detachably screwed to a rotary shaft of a power tool or the like. An outer flange functioning as a nut, and a bag-nut-shaped ring having a flange end face for holding the rotary cutting tool between the outer flange and the rear surface of the outer flange and fixing them together. When attached to the rotary blade, the outer flange, the rotary blade, and the bag-shaped nut are provided via an O-ring fitted into a groove provided on the outer peripheral surface of the cylindrical portion of the outer flange. And the ring are formed integrally. Such a mounting member of the present invention basically comprises three parts, an outer flange, an O-ring, and a bag-nut ring, and the outer flange and the bag-nut ring can be designed very simply, In general, commercially available mild steel is sufficient and has a structure that can be easily processed. O-rings can also be selected from commercially available ones WO 01/36157 PCT / JP0O / O794S

Because it is 4, it can be obtained at low cost.

Further, in the mounting member for a rotary cutting tool according to the present invention, the outer flange includes a flange portion and a cylindrical portion projecting rearward from a back surface of the flange portion. A female screw for fitting is formed, and the shape to function as a nut of the flange part corresponds to at least one or more tools such as a spanner, a wrench, a hexagon wrench, a screwdriver, etc. The cylindrical portion is provided with a rotary blade mounting portion that passes through a mounting hole of the rotary blade, and a groove for fitting an O-ring at a predetermined position on the outer peripheral surface of the cylindrical portion. The bag nut-shaped ring has a first guide portion whose inner diameter surface is inserted into the rotating shaft of the electric tool, and a second guide portion which is fitted to the outer peripheral surface of the cylindrical portion of the outer flange. Is provided on the inner peripheral surface at the tip of the second guide portion. A claw for gripping an O-ring fitted in a groove provided on the outer peripheral surface of the cylindrical portion of the outer flange is formed. Thus, the rotary blade mounted on the rotary flange mounting portion of the outer flange can be sandwiched between the outer flange and the bag-nut-shaped ring to be integrated and accurately mounted.

The mounting member of the rotary cutting tool according to the present invention may further include at least one annular groove for loading a cushioning material on a flange end surface of the bag-nut-shaped ring which is in contact with the back surface of the rotary cutting tool. Is formed, and the back surface of the rotary blade is pressed against the buffer loaded in the groove. This makes it possible to effectively reduce the vibration and noise generated during the grinding process, especially for cup wheels and offset diamond blades, by the action of the cushioning material. Note that an elastic material such as resin or rubber can be appropriately selected as the cushioning material.

Further, in the mounting member of the rotary blade according to the present invention, the rotary blade is provided with diamond abrasive grains or cBN on a blade portion or a main working surface of a circular or pliable substrate. δ It is characterized by being a superabrasive tool such as a diamond saw blade, a diamond cup wheel, and an offset type diamond blade provided with a grindstone portion and mainly composed of abrasive grains. As a result, it can be applied to a wide variety of superabrasive tools, and there is no need to separately prepare a mounting tool for each rotary cutting tool. These superabrasive tools are widely used for grinding and polishing of hard and brittle materials such as concrete and stone, ceramic materials such as tiles and tiles, synthetic rubber, synthetic resins, metals, and various building materials. It is a tool that is generally attached to a hand-held power tool via an attachment member, and is used for each task.

Further, the rotary blade with the mounting member according to the present invention attached thereto has the mounting member for the rotary blade attached thereto. As a result, when changing the work material and the machining operation, even if the rotary cutting tool needs to be replaced, it can be attached and detached very easily. In addition, since the flange member attached to the power tool is not required, the cost and troublesomeness of storage management can be eliminated. Furthermore, since the rotary blade and the mounting member are formed in a body, the misalignment with the rotary shaft of the electric tool is also eliminated, and the hitting phenomenon caused by that is also prevented.

In addition, the rotary cutting tool having the mounting member according to the present invention attached thereto includes a rotary cutting tool force ^S , a grinding wheel mainly composed of diamond abrasive grains or cBN abrasive grains on a blade portion or a main working surface of a circular or cup-shaped substrate. It is characterized by a super-abrasive tool such as a diamond saw blade, a diamond cup blade, an offset type diamond blade, and the like.

In addition, the rotary cutting tool having the mounting member according to the present invention attached thereto is a power cutting wheel having a three-layer structure of a rotary cutting tool, a force bar that covers an elastic material on the back surface of the cup-shaped substrate, and a power bar that covers the elastic material. It is. By this, when the substrate of the rotary blade and the cover are integrated by the mounting member, the elastic force built in by the elastic material interposed between the cup-shaped substrate and the cover effectively acts, The idling of the cup wheel can be prevented. As the elastic material, resin, rubber, or the like can be appropriately selected. The cover for covering the elastic material is preferably made of a material having a higher mechanical strength than the elastic material, for example, a metal.

BRIEF DESCRIPTION OF THE FIGURES

1 to 6 show a first embodiment according to the present invention. FIG. 1 is a front view of an outer flange, FIG. 2 is a sectional view taken along line A--A of FIG. 1, and FIG. Sectional view of the bag nut ring, Fig. 4 is a cross-sectional view of the main part showing the mounted state of the rotary blade and the mounting member, Fig. 5 is a front view of the rotary blade with the mounting member mounted, and Fig. 6 is B- It is sectional drawing along the B line. 7 and 8 show a second embodiment according to the present invention. FIG. 7 is a front view of a cup wheel with an attachment member attached, and FIG. 8 is a view taken along line C--C in FIG. It is sectional drawing. 9 and 10 show a third embodiment according to the present invention. FIG. 9 is a cross-sectional view of a wrench wheel with an attachment member attached thereto, and FIG. 10 is a bag nut in FIG. It is a front view of a toroidal ring. FIGS. 11 and 12 show a fourth embodiment of the present invention. FIG. 11 is a cross-sectional view of a cup wheel with an attachment member attached thereto, and FIG. 12 is a bag shown in FIG. It is a front view of a nut-shaped ring. FIG. 13 is a cross-sectional view of a main part showing a conventional structure for attaching a rotary cutting tool to a power tool or the like. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described more specifically with reference to embodiments. However, the present invention is not limited thereto, and design changes can be freely made within the scope of the present invention.

The rotary blade mounting member according to the first embodiment of the present invention basically includes an outer flange 1 shown in FIG. 1 and FIG. 2 and a bag-nut-shaped ring 6 shown in FIG. The outer flange 1 in this example corresponds to a ready-made 24 Hidden spanner. A hexagonal tool steel material sold as a material is used as a material, and is composed of a flange portion 11 1 formed by cutting with a lathe and a cylindrical portion 4, and an engagement hole 2 is formed in the flange portion 1 1, In addition to the spanner, it can be attached and detached using a crab wrench. The shape of the flange portion 11 can be appropriately selected, for example, by forming it in a bag-nut shape so as to correspond to a hexagon wrench, or by providing a straight groove so as to correspond to a driver.

A cylindrical portion 4 is formed protruding rearward from the back side of the flange portion 11 of the outer flange 1, and the rotary blade 8 is inserted into the cylindrical portion 4 on the side in contact with the rear surface 11 a of the flange portion, and the rotary blade 8 is formed. And the outer peripheral surface portion 10a having an outer diameter slightly smaller than the outer diameter of the rotary blade mounting portion 10 connected thereto, and a predetermined position of the outer peripheral surface portion 10a. A groove 5 is formed in the groove, and an O-ring 9 is fitted in the groove 5. In addition, a female screw 3 for screwing with a male screw of the rotating shaft of the electric tool is formed on the inner peripheral surface at the center of the outer flange 1.

The bag-nut-shaped ring 6 shown in Fig. 3 is manufactured by cutting a commercially available round bar tool steel material using a lathe, and has a first guide portion 20 through which the inner diameter surface passes through the electric tool rotating shaft. And a second guide portion 21 having an inner diameter slightly larger than the outer diameter of the outer peripheral surface portion 10 a of the cylindrical portion communicating with the cylindrical portion 4 of the outer flange 1, and the second guide portion 21 is formed. A claw 7 protruding inward is formed on the inner peripheral surface of the distal end portion. The ring-shaped nut 6 is inserted into the rotary blade mounting portion 10 of the outer flange 1, and the rotary blade 8 set therein is pressed and fixed at the end face 22 a of the flange portion. It plays a role in adjusting the distance from the spindle notch, and has the function of combining an inner flange, which has been used as an accessory part of a conventional power tool, and an adapter (washer). Specifically, as shown in Fig. 4, the rotary blade 8 is inserted into the rotary blade mounting portion 10 of the outer flange 1, and is inserted into the groove 5 provided on the outer peripheral surface of the cylindrical portion 4 of the outer flange 1. When the O-ring 9 is fitted and the bag nut-shaped ring 6 is pushed in and set, the claw 7 provided around the tip of the second guide part 21 of the bag-nut ring 6 is set. Since the O-ring 9 is pressed and gripped, the end face 22 a of the flange portion strongly presses the rotary cutting tool 8 by the action of the elasticity of the O-ring 9. For this reason, the outer flange 1, the rotary blade 8 and the bag nut-shaped ring 6 are integrally fixed.

The outer flange 1 and the bag-nut-shaped ring 6 in the present embodiment are usually manufactured by machining a metal such as a commercially available soft iron. It is also possible to use a corrosion-resistant metal such as or the like, or to select a heat-resistant resin or the like as appropriate according to the work material and the rotary cutting tool to be replaced by the intended operation. As the O-ring 9, a commercially available O-ring may be appropriately selected and used for hydraulic piping, for example. For example, an O-ring of JISB2401P16 may be used. The dimensions and the like are appropriately selected according to the groove 5 (for example, width 2.4 mm, depth 1 mm) provided in the cylindrical portion 4 of the outer flange 1. As described above, the O-ring 9 is gripped by the claw 7 provided on the inner peripheral surface at the end of the second guide portion 21 of the bag-nut-shaped ring 6, and is used to fix the rotary blade 8 The elastic force is used, and after the mounting member is fixed to the rotary blade 8 to the body, no special load is applied, and no special consideration is required for the material.

The rotary blade having the mounting member according to the present embodiment attached thereto has the above-described mounting member mounted on the rotary blade. As shown in FIGS. 4 to 6, the rotary blade tool of this example has a diamond saw blade 5 formed by forming a grindstone 105 mainly composed of diamond abrasive grains on the outer peripheral surface of a circular steel substrate. It is 0, and is widely used mainly for cutting hard and brittle materials such as stone and concrete, and metals such as iron.

A mounting member according to a second embodiment of the present invention will be described with reference to FIGS. I will tell. 7 and 8, the same components as those in FIGS. 1 to 6 are denoted by the same reference numerals, and the description thereof will be omitted. Only different points will be mainly described. That is, the different points are that a cutting wheel 8a is used in place of the diamond saw blade 50 as the rotary blade, and that the width dimension of the rotary blade mounting portion 10 of the outer flange 1 is increased. It is in. As shown in FIG. 8, the cup wheel 8a is formed by forming a grindstone 105 mainly composed of diamond abrasive grains on the outer periphery of a cup-shaped steel substrate 8 as shown in FIG. An elastic material 16 is interposed between the elastic material 16 and the cover 1 covering the elastic material 16. The elastic material 16 is made of a commercially available foamed rubber having a thickness of 2 mm, and the shape of the elastic material in this example is a force-like shape almost similar to the shape of the force-like substrate. If it can, it is not limited to this. Further, in this example, the cover 17 is made of steel having a thickness of 1 mm almost covering the elastic material 16, but the shape is not particularly limited, and the elastic force of the elastic material is ensured so that An appropriate choice can be made as long as the resistance is sufficient to prevent slipping. Also, the elastic member 16 may be formed integrally with the cover 17 in advance. The width dimension of the rotary blade mounting portion 10 of the outer flange 1 is equal to or slightly smaller than the thickness of the three-layer structure of the cup wheel 8a. Thereby, the end face 22 a of the flange portion of the bag-nut-shaped ring 6 can effectively press the back surface of the cover 17. As a result of attaching the cup wheel 8a with the mounting member according to this example to a hand-held power tool and grinding it for concrete and stone, the power tool rotating shaft and the rotary blade tool mounting member In addition to significantly reducing the tapping phenomena caused by runout, vibration and noise were effectively reduced, making it easier to perform grinding work with excellent machining accuracy.

A mounting member according to a third embodiment of the present invention will be described with reference to FIG. 9 and FIG. In FIGS. 9 and 10, the same components as those in FIGS. The description is omitted with the numbers attached, and only the differences will be mainly described. That is, the difference is that a cup wheel 8b is used as a rotary cutting tool. A single annular groove 19 is formed on the end face 22a of the flange portion of the bag-nut ring, and the groove is formed. The point is that an O-ring 13 as a cushioning material was fitted to 19. That is, the end surface 22 a of the flange portion of the bag-nut-shaped ring 6 a is pressed against the rear surface of the substrate 8 of the force-up wheel inserted into the rotary blade mounting portion 10 of the outer flange 1 via the O-ring 13. I do. As a result, it is possible to effectively reduce the vibration and noise generated particularly during grinding of a cup wheel, an offset type diamond blade, or the like by the action of the O-ring 13. In addition, according to this example, since there is only one O-ring 13 as a cushioning material, there is a concern that the power wheel 8b may slip due to resistance during the grinding operation. Therefore, in this example, in order to prevent such a phenomenon, a spring pin 18 is set at a predetermined position of the outer flange 1 so as to press-contact the O-ring 13. The gap B between the bottom of the bag nut-shaped ring 6a and the distal end surface of the cylindrical portion 4 of the outer flange 1 corresponds to the end face 22a of the flange of the bag nut-shaped ring 6a. By designing the gap A with the back surface of the rotary blade so that A is larger than B, the O-ring 13 is not unnecessarily crushed. For this reason, the resilience of the O-ring 13 is maintained, and the cushioning effect remains. The O-ring 13 that functions as a cushioning material as a result of attaching such a power-up wheel with the mounting member according to this example attached to a hand-held power tool and grinding concrete and stone, etc. It was confirmed that the effect provided both a damping effect and a noise prevention effect.

A mounting member according to a fourth embodiment of the present invention will be described with reference to FIG. 11 and FIG. In FIGS. 11 and 12, the same components as those in FIGS. 10 to 11 are denoted by the same reference numerals, and description thereof will be omitted. Only different points will be mainly described. That is, the difference is in front of the flange of the bag-nut ring. Two annular grooves 19a and 19b are formed on the end face 22a, and O-rings 13 and 13 as cushioning materials are fitted into the grooves 19a and 19b. It is in the point which made it. As a result, two O-rings 13 serving as cushioning material can be loaded, so that the fear of idling due to resistance during grinding work, which was a concern in the third embodiment, is eliminated, and the spring pin 1 is used. 8 is no longer needed. In this embodiment, too, the gap B between the bottom of the bag nut-shaped ring 6b and the rear end surface of the cylindrical portion 4 of the outer flange 1 corresponds to the flange portion of the bag nut-shaped ring 6b. The gap A between the front end face 2 2a of the rotary cutter 8 and the back face of the rotary cutting tool 8 is designed so that A is larger than B, so the repulsive force of the O-ring 13 as a cushioning material remains. At the same time, since an air pocket is generated between the two O-rings 13, a further damping effect is exerted, so that an excellent vibration damping effect and an excellent noise prevention effect are simultaneously provided. Industrial applicability

ADVANTAGE OF THE INVENTION The mounting member of the rotary blade of the present invention makes it easy to attach and remove the rotary blade to and from the power tool, and it becomes extremely easy to replace the rotary blade in accordance with a change in the work material and the processing operation. Significantly contribute to the improvement of In addition, since the mounting member for the power tool is attached to each rotary blade individually, it is free from troublesome storage management such as prevention of loss of the mounting parts.

In addition, the mounting member of the rotary cutting tool according to the present invention can be made extremely simply using a commercially available material that is inexpensive and easily available, and the number of parts is small, so that the cost is extremely low. Can be provided. Furthermore, since the portion functioning as a nut of the outer flange can be handled by a plurality of tools, its convenience is enhanced.

In addition, the mounting member of the rotary cutting tool according to the present invention is particularly suitable for a cup wheel or an offset tool. It is possible to effectively reduce the vibration and noise during the grinding process for a cut-type blade. The rotary cutting tool having the mounting member of the present invention attached thereto is a mounting member including an inner flange and an outer flange attached to a power tool, which have been widely used in the past, and a power tool via the mounting member. Unlike the rotary blade, the mounting member of the rotary blade is attached to each rotary blade with high accuracy, so when grinding concrete, stone, etc. using this, the power tool rotary shaft and the mounting member Alignment caused by tolerance is prevented beforehand, and the unpleasant hitting phenomenon resulting therefrom is effectively eliminated. Therefore, the life performance of the rotary cutting tool as a tool is improved, and excellent machining accuracy is guaranteed. Further, if the cup wheel having the mounting member of the present invention attached thereto is mounted on an electric tool for grinding, an excellent vibration damping effect and a soundproofing effect are simultaneously obtained, and the grinding is performed for stone materials and concrete members. However, high utility is expected.

Claims

The scope of the claims

1. A mounting member that is attached to a rotating blade tool such as a diamond blade having a mounting hole in the center of a circular substrate and is detachably screwed to a rotating shaft such as a power tool. And a bag-nut-shaped ring having a flange end face for sandwiching and fixing the rotary cutting tool between the outer flange and a rear surface of the outer flange. When it is attached to the outer flange, the outer flange, the rotary cutting tool, and the bag-nut-shaped ring are connected via the o-ring 0 fitted in the groove provided on the outer peripheral surface of the cylindrical portion of the outer flange. A mounting member for a rotary blade, which is formed on a body.

2. The outer flange includes a flange portion and a cylindrical portion protruding rearward from the rear surface of the flange portion, and a female screw for screwing with a male screw of the power tool rotating shaft is formed at a central portion thereof. A shape for functioning as a nut of the flange portion 5 is formed so as to correspond to at least one or more of tools such as a spanner, a claw wrench, a hexagon wrench, a screwdriver, and the like. A rotary blade mounting portion that passes through the mounting hole of the rotary blade and a groove for fitting a ring at a predetermined position on the outer peripheral surface of the cylindrical portion are provided, and the bag-nut-shaped ring is A first guide portion that passes through the inner diameter surface of the rotating shaft of the power tool, and a second guide portion that fits on the outer peripheral surface of the cylindrical portion of the outer flange, and a tip of the second guide portion is provided. The inner peripheral surface of the portion is provided on the outer peripheral surface of the cylindrical portion of the outer flange. Ο by forming a pawl for gripping-ring fitted to the mounting member of the rotary blade according to claim 1, wherein the wherein the.

3. At least one annular groove for loading a cushioning material is formed on a flange end face of the bag nut-shaped ring which comes into contact with the back surface of the rotary cutting tool, and the cushioning material loaded in the groove is formed. Presses the back of the rotary blade A mounting member for the rotary cutting tool according to claim 1 or 2.

4. The diamond blade, the diamond cup wheel, and the rotary blade are provided with a grindstone part mainly composed of diamond abrasive grains or cBN abrasive grains on the blade part or main working surface of the circular or cup-shaped substrate. 4. The mounting member for a rotary cutting tool according to claim 1, which is a superabrasive tool such as an offset type diamond blade.

5. A rotary cutting tool having a mounting member, wherein the mounting member of the rotary cutting tool according to claim 1 is mounted.

6. A diamond saw blade or diamond cup wheel in which a rotary blade is provided with a grindstone portion mainly composed of diamond abrasive grains or cBN abrasive grains on a blade portion or a main working surface of a circular or cup-shaped substrate. A rotary cutting tool having the mounting member according to claim 5, which is a superabrasive tool such as an offset type diamond blade.

7. The mounting member according to claim 5, wherein the rotary blade is a force-up wheel having a three-layer structure with an elastic material interposed on a back surface of the cup-shaped substrate and a cover covering the elastic material. Rotary blade tool.