WO2007023688A1

WO2007023688A1 - Rotary tool

Info

Publication number: WO2007023688A1
Application number: PCT/JP2006/315830
Authority: WO
Inventors: Yoshio Shibai
Original assignee: Sanwa Kenma Kogyo Company Limited
Priority date: 2005-08-26
Filing date: 2006-08-10
Publication date: 2007-03-01
Also published as: JP2007054933A

Abstract

A rotary tool, comprising an adapter (20) rotating integrally with a rotating drive shaft, a bag body (30) fitted to the front face thereof, and a rotary tool body (40) installed on the outside of the bag body. A fluid is sealed in the bag body (30). A centrifugal force acts on the fluid when the rotary tool is rotated to hold the rotary tool body (40) on the bag body (30) from the inside. A locking member (50) for locking the rotary tool body (40) is installed on the adapter (20) side. When the rotational speed of the rotary tool is lowered, the locking member stops that the rotary tool body (40) is axially released from the adapter (20).

Description

Specification

Rotating tool

Technical field

The present invention relates to a rotary tool for polishing or the like, which includes a tool body that can be attached to and detached from a rotary drive shaft.

Background art

Conventionally, rotary tools that process a machined surface while rotating at high speed are known. This type of rotary tool is generally detachably mounted on a rotary drive shaft connected to a drive source such as a motor and can be appropriately replaced. As means for detachably attaching such a rotary tool to a rotary drive shaft, conventionally, for example, as described in Patent Document 1, screw-type fasteners such as bolts and nuts are often used.

[0003] However, the mounting structure using the screw as described above is complicated and expensive. In addition, a jig for turning the screw is necessary when attaching and detaching, and the rotation operation is very troublesome. In particular, a rotating tool that rotates at a high speed needs to be tightened so that the centrifugal force acting on the rotating tool can be counteracted, which makes the replacement work more complicated.

[0004] As means for solving such inconvenience, Patent Document 2 discloses a rotary tool that holds a rotary tool body using centrifugal force of a fluid. In this rotary tool, an elastically deformable bag is attached to the rotary drive shaft side, and the fluid is sealed in the bag. When this bag rotates, a centrifugal force acts on the fluid, and this centrifugal force causes the bag to bulge outward in the radial direction to hold the rotary tool main body in the bag with the inner force.

[0005] However, if the rotational speed of the rotary tool decreases due to, for example, being subjected to a large rotational resistance during the caulking, the centrifugal force, that is, the force for holding the rotary tool body decreases, and the rotary drive shaft is reduced. There is a risk of allowing the rotary tool body to fall off.

Patent Document 1: Japanese Patent Laid-Open No. 2001-225274

Patent Document 2: Japanese Patent Laid-Open No. 2003-145432

Disclosure of the invention [0006] An object of the present invention is to provide a rotary tool for solving the above-described problems. The rotary tool is attached to a rotary tool main body that can be attached to and detached from the rotary drive shaft, a rotary member that is fixed to the rotary drive shaft so as to rotate integrally with the rotary drive shaft, and a front side of the rotary member. And an elastically deformable bag body in which a fluid is sealed. The rotary tool main body has a shape that covers the bag body from the outside, and has a processing portion that processes the processing surface by contacting the processing surface in a state of covering the bag body. The bag body has a shape that holds the rotary tool body from the inside by a centrifugal force acting on a fluid in the bag body when rotating integrally with the rotation drive shaft. Further, a locking portion is provided on the rotating member side, and the locking portion rotates so as to restrict the rotary tool main body held by the bag body from being detached from the rotating member in the axial direction. The tool body is locked to the rotating member side.

Brief Description of Drawings

FIG. 1 is a cross-sectional perspective view showing a rotary tool according to an embodiment of the present invention.

FIG. 2 (a) is a rear view showing the adapter of the rotary tool, and FIG. 2 (b) is a partial cross-sectional side view showing the adapter and a rotary drive shaft connected to the adapter.

3 (a) is a perspective view showing a polishing member of the rotary tool, FIG. 3 (b) is a rear view thereof, and FIG. 3 (c) is a sectional side view thereof.

FIG. 4 (a) is a front view of the polishing member, and (b) is a side view thereof.

FIG. 5 (a) is a perspective view showing a locking member of the rotary tool, and FIG. 5 (b) is a rear view thereof.

[FIG. 6] (a) is a cross-sectional view taken along line AA in (c), (b) is a cross-sectional view taken along line BB in (c), and (c) is a front view of the locking member.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

[0009] The illustrated rotary tool includes an adapter 20 corresponding to a rotary member, a bag body 30, and a polishing member 40 corresponding to a rotary tool main body. The adapter 20 is fixed to a rotary drive shaft 10 as shown in FIG. The bag 30 is attached to the adapter 20.

[0010] The rotary drive shaft 10 integrally includes a shaft main body 12 connected to a drive source (not shown) and a screw shaft portion 14 on the distal end side thereof. The screw shaft portion 14 has an outer diameter smaller than the outer diameter of the shaft body 12. And the external thread is formed in the outer peripheral surface. A machining fluid supply hole 16 for supplying a machining fluid to the shaft tip side is provided on the rotation center axis of the rotary drive shaft 10.

The adapter 20 is made of a material having a relatively high strength such as a metal material, and integrally includes a substrate portion 22 and a boss portion 24.

The substrate portion 22 has a disk shape orthogonal to the rotation drive shaft 10. A circumferential groove 22a for mounting a bag body 30 described later is recessed on the front surface (lower surface in FIG. 1) of the substrate portion 22. The substrate portion 22 has a plurality of (three in the illustrated example) bolt insertion holes 22b penetrating the substrate portion 22 in the thickness direction and an injection plug for allowing a fluid injection plug 38 to be described later to pass therethrough. A through hole 22c is provided.

[0013] The boss portion 24 has a substantially cylindrical shape penetrating the central portion of the substrate portion 22 in the axial direction.

On the inner peripheral surface of the boss portion 24, a female screw 24a that can be screwed with the screw shaft portion 14 is formed. Screwing and tightening of the female screw 24a and the screw shaft portion 14 fix the adapter 20 to the rotary drive shaft 10.

The boss portion 24 has an end wall 26 at the front end (lower end in FIG. 1). The end wall 26 closes the space inside the boss 24 from the front end side. The end wall 26 is provided with a plurality of machining liquid injection holes 26a penetrating the end wall 26 in the axial direction.

[0015] The bag body 30 is made of an elastic material such as rubber (for example, natural rubber, urethane rubber, elastomer). The bag 30 forms a bag shape that surrounds the internal space and opens the internal space rearward (upward in FIG. 1). The bag body 30 is fixed to the adapter 20 so that the adapter 20 closes the open portion in a state where a suitable fluid (for example, water) is sealed in the internal space.

[0016] Specifically, the bag body 30 includes a cylindrical inner peripheral wall 31, a front wall 32 extending radially outward from the front end of the inner peripheral wall 31, and an outer peripheral wall extending rearward from the outer peripheral portion of the front wall 32. 33 and the rear wall of the outer peripheral wall 33 also have an auxiliary wall 34 that extends radially inward. The entire bag body 30 has an annular shape that surrounds the end wall 26 of the adapter 20 also in the radially outward force. The bag body 30 has wedge portions 35 and 36 in which rear ends of the inner peripheral wall 31 and the auxiliary wall 34 also protrude radially inward, and these wedge portions 35 and 36 use a fixing plate 27 and bolts 28. And fixed in the circumferential groove 22a.

[0017] The wedge portions 35, 36 are formed in the bag body 30 in the radially inner portion of the circumferential groove 22a and It exists in the position which can be each fitted by an outer part. The front surface of the wedge portion 35 is a tapered surface 35a whose diameter is increased toward the rear end (upper end in FIG. 1), and the front surface of the wedge portion 36 is a tapered surface 36a whose diameter is reduced toward the rear end. It is.

[0018] The fixing plate 27 has a donut plate shape that can be fitted into a radially inner portion of the circumferential groove 22a. Tapered surfaces 27a and 27b are formed on the inner peripheral portion and the outer peripheral portion of the fixing plate 27, and these tapered surfaces 27a and 27b have shapes that can come into contact with the tapered surfaces 35a and 36a of the wedge portions 35 and 36, respectively. Have. Then, the fixing plate 27 is fixed to the bottom surface of the circumferential groove 22a by the bolt 28 so that the tapered surface 27a and the tapered one surface 35a are in pressure contact with each other, and the tapered surface 27b and the tapered surface 36a are in pressure contact with each other. Tightened to the side (upper side in Fig. 1). That is, it is fastened to the adapter 20 side. By this fastening, the fixing plate 27 fixes the bag body 30 to the adapter 20 while closing the open portion of the bag body 30.

Specifically, the adapter 20 is provided with a plurality of bolt insertion holes 22b as shown in FIG. 2 (b), and the fixing plate 27 is not shown corresponding to the bolt insertion holes 22b. Screw holes are provided. The bolts 28 are also passed through the bolt through holes 22b and screwed into the screw holes. This fastens the fixing plate 27 to the adapter 20, and causes the fixing plate 27 and the adapter 20 to sandwich the wedge portions 35 and 36 of the bag body 30.

[0020] A fluid injection plug 38 is inserted into the injection plug through hole 22c of the adapter 20 with an upper force. The fluid injection plug 38 is screwed into a screw hole 27c (FIG. 1) provided in the fixing plate 27, so that the fluid flows from the outside into the bag body 30 through the fluid injection plug 38 and the screw hole 27c. Allows to be injected.

[0021] The polishing member 40 includes a polishing support member 41 having an elastic material force similar to that of the bag body 30, and a polishing plate attached to the front surface (lower surface in FIG. 1) of the polishing support member 41. 42 and equipped.

As shown in FIG. 3, the polishing support member 41 has a donut-shaped front side wall 44 that covers the front wall 32 of the bag 30 also with a front side force, and extends rearward from the inner peripheral edge of the front side wall 44. An inner peripheral wall 45 that is externally fitted to the inner peripheral wall 31 of the bag body 30 from the radially inner side, and an outer peripheral wall 33 of the bag body 30 It has a thick outer peripheral wall 46 that covers from the outside in the radial direction. The polishing plate 42 is fixed to the front side surface (the lower surface in FIG. 1) of the front side wall 44 with an adhesive or the like.

The polishing plate 42 constitutes a processing part that processes the processed surface by contacting the appropriate processed surface. Specifically, the polishing plate 42 has a large number of protruding portions 42a as shown in FIG. 4 on the surface thereof, and each of the protruding portions 42a contains a W abrasive gunshot. For the base material of the polishing plate 42, a synthetic resin having a certain degree of elasticity is suitable, and a material equivalent to a binder in a normal grindstone can be used. Specifically, various synthetic resins (phenolic resin, melamine resin, polyurethane resin, epoxy resin, polyester resin, mixtures thereof, etc.) are suitable. The abrasive grains used in ordinary grinding wheels are applicable, for example, diamond, cubic boron nitride (CBN), silicon carbide (SiC), aluminum oxide (Al 2 O 3), Alternatively, a mixture of these is preferable.

twenty three

The polishing member 40 has a plurality of (three in the illustrated example) to-be-latched portions 47 as a feature. These locked portions 47 are at a plurality of positions arranged at equal intervals in the circumferential direction. Each locked portion 47 extends rearward from the rear end (the upper end in FIG. 1) of the outer peripheral wall 46 and protrudes to the rear of the substrate portion 22 through a notch 22d formed in the outer peripheral edge of the substrate portion 22 of the adapter 20. It has a possible shape. A radially outward locked projection 47a is formed at the protruding end, and a protruding portion 48 protruding radially outward is formed in the vicinity of the locked projection 47a. The engagement between each of the locked portions 47 and the corresponding notch 22d restricts the relative rotation of the polishing member 40 with respect to the adapter 20.

[0025] The rotary tool body of the rotary tool according to the present invention is not limited to the polishing member 40 having the structure shown in the drawing. For example, it may be an abrasive using a sintered metal powder as a binder or a puff used for final finishing! /.

[0026] Further, the rotary tool includes a locking member 50 for locking the polishing member 40 to the adapter 20 side.

[0027] This locking member 50 is provided on the back side (upper side in Fig. 1) of the adapter 20, and as shown in Figs. 5 and 6, a donut plate-shaped main body having a through hole 51 in the center. A wall 52 and a peripheral wall 54 extending forward (downward in FIG. 1) from the outer peripheral edge of the main body wall 52 are integrally provided.

[0028] The body wall 52 has a posture in which the boss portion 24 of the adapter 20 is inserted into the through hole 51. Is attached to the adapter 20 side so as to be rotatable around the boss portion 24, and the substrate portion 22 is covered with the rear side force in the attached state. At a position immediately behind the main body wall 52 (upward in FIG. 1), a retaining ring 60 for preventing the main body wall 52 from coming off in the axial direction is mounted around the box portion 24.

[0029] As shown in Figs. 1 and 5, the main body wall 52 is provided with a through hole 53 for allowing the fluid injection plug 38 to pass therethrough. The through-hole 53 has a shape of a long hole extending in the circumferential direction of rotation so that the locking member 50 can be rotated relative to the adapter 20.

On the other hand, the peripheral wall 54 is formed with a plurality of locking portions for locking the locked portions 47 provided on the polishing member 40. Each locking portion is located at a position corresponding to each of the locked portions 47, and includes a bulging portion 55 and a locking groove 56 adjacent to the bulging portion 55 in the circumferential direction.

[0031] The bulging portion 55 is a portion indicated by a mesh in FIG. 5 (a), has a shape that bulges radially outwardly compared to the other portions, The rear end portion has a shape that can be received (inserted) in the axial direction including the locked protrusion 47a.

Each of the locking grooves 56 extends in the circumferential direction from one circumferential end of each bulging portion 55 (in the illustrated example, the end on the downstream side in the clockwise direction when viewed from the main body wall 52 side). It has a shape that penetrates the peripheral wall 54 in the radial direction, and has a width dimension (vertical dimension in FIG. 5A) larger than the thickness of the locked protrusion 47a. A concave portion 58 is formed on the inner peripheral surface of the peripheral wall 54 at a position corresponding to the center position in the circumferential direction of each locking groove 56, and the protruding portion 48 of each locked portion 47 is fitted into the concave portion 58. Is possible.

[0033] In this structure, when the locking member 50 is at a specific relative rotation angle position (first relative rotation angle position) with respect to the polishing member 40, each bulged portion 55 is engaged with each engaged member. The stop protrusion 47a can be fitted in the axial direction. After the insertion, the locking member 50 is operated to rotate relative to the polishing member 40 up to the first relative rotational angle position force to the second relative rotational angle position (in the illustrated example, the main body wall 52 side force is measured). Relative locking in the counterclockwise direction), the locked protrusion 47a enters the locking groove 56, and the front side wall of this locking groove 56 (the lower side wall in FIG. 5 (a)). 57 abuts on the locked protrusion 47a. This contact is The polishing member 40 is prevented from coming off from the adapter 20 and the bag body 30 in the axial direction, and the difference between the width dimension of the locking groove 56 and the thickness dimension of the locked protrusion 47a is the adapter 20 and the locking member. An axial relative displacement of the polishing member 40 with respect to 50 is allowed.

Further, the protruding portion 48 of the locked portion 47 is fitted into the recess 58 of the locking member 50 at the second relative rotation angle position. This insertion suppresses the backward movement of the locking member 50 from the second relative rotation angle position to the first relative rotation angle position.

[0035] This rotary tool is used in the following procedure.

First, the rotary drive shaft 10 shown in FIG. 2B and the adapter 20 connected thereto are stationary and are attached to the adapter 20 and polished outside the bag body 30. The polishing member 40 is locked to the adapter 20 side so that the member 40 is covered. Specifically, in a state where the locking member 50 is at the first relative rotational angle position with respect to the polishing member 40, the front end side of each bulging portion 55 of the locking member 50 (FIG. 5). Each locked portion 47 is inserted in the axial direction (including the locked protrusion 47a) from the lower end side in (a). Furthermore, the engaging member 50 is operated so as to rotate relative to the polishing member 40 from the inserted state to the second relative rotation angle position side. By this operation, the locked protrusion 47a of the locked portion 47 enters the locking groove 56 of the locking member 50, and the protruding portion of the locked portion 47 enters the recess 58 of the locking member 50. 48 is inserted.

[0037] At this stage, centrifugal force does not act on the fluid in the bag 30. This facilitates the engagement between the polishing member 40 and the locking member 50.

Next, a drive source such as a motor connected to the rotary drive shaft 10 operates to rotate the entire rotary tool integrally with the rotary drive shaft 10. This rotation causes a centrifugal force to act on the fluid sealed in the bag 30. This centrifugal force also presses the outer peripheral wall 33 of the bag 30 against the outer peripheral wall 46 of the polishing member 40, and the pressing force enables the polishing member 40 to be held on the bag 30 side. . In addition, the increase in the rotational speed of the rotary tool, that is, the increase in the centrifugal force acting on the fluid strengthens the force for holding the polishing member 40 and makes the holding of the polishing member 40 more reliable. In this way, while the entire rotary tool rotates at high speed, the projecting portion 42a of the polishing plate 42 of the polishing member 40 is pressed against the processing surface to polish the processing surface. During this machining, machining fluid is added to the rotary drive shaft 10. It is sprayed from the machining fluid supply hole 16 to the machining surface through the machining fluid injection hole 26a of the adapter 20 from the center of the tool, and is effectively supplied to the machining surface with higher efficiency than when the external force of the tool is sprayed, for example.

[0039] When the rotational speed of the rotary tool is remarkably reduced due to the occurrence of a large rotational resistance during the polishing process, the centrifugal force acting on the fluid in the bag body 30 and the polishing member 40 due to the centrifugal force is correspondingly reduced. The holding power is reduced. This decrease in holding force can allow the polishing member 40 to fall off from the bag 30 and the adapter 20 in the axial direction in the conventional rotary tool. However, in the rotary tool of this embodiment, the locked protrusion 47a of each locked portion 47 in the polishing member 40 enters the locking groove 56 on the locking member 50 side, and the locking groove 56 Since the engaged protrusion 47a hits the front side wall 57, the polishing member 40 is locked to the locking member 50 side and is prevented from coming off from the adapter 20, thereby reducing the rotational speed. Regardless, it is possible to maintain a state where polishing is possible.

[0040] In particular, in this embodiment, since each of the locked portions 47 is fitted into each notch 22d of the adapter 20, the relative rotation of the polishing member 40 with respect to the adapter 20 is restricted. Even if the lowering lowers the holding force of the polishing member 40 by the bag 30, the rotational energy of the adapter 20 is reliably transmitted to the polishing member 40 and maintains a high processing efficiency. However, the locking member 50 and the polishing member can be rotated relative to the adapter 20 regardless of the restriction on the relative rotation between the adapter 20 and the polishing member 40. Easily engage / disengage with 40.

[0041] In this embodiment, the width dimension of the locking groove 56 of the locking member 50 is larger than the thickness dimension of the locked protrusion 47a, and the difference between these dimensions is The axial relative displacement of the polishing member 40 with respect to the member 50 and the adapter 20 is allowed within a specific range. The relative displacement and the elastic deformation of the bag 30 enable a change in the specific range of the relative angle of the polishing member 40 with respect to the rotary drive shaft 10, and this change is caused by the polishing plate 42 of the polishing member 40 being processed. It is possible to flexibly follow changes in the orientation of the surface.

[0042] In the present invention, the locking member 50 is not necessarily required. For example, the locked protrusion 47a of each locked portion 47 protrudes inward rather than outward in the radial direction, and the locked protrusion 47a pulls on the back surface (upper surface in FIG. 1) of the adapter 20. The structure is also adapter 40 Enables easy locking to the 20 side. However, in this case, the radially outward inner pressure applied from the bag body 30 to the polishing member 40 acts in a direction in which the locked protrusion 47a is released from the adapter 20, as shown in the figure. In a structure in which the radially-outward locked protrusion 47a is engaged with the peripheral wall 54 of the locking member 50 from the inside, the internal pressure presses the locked protrusion 47a against the peripheral wall 54 of the locking member 50. Acts in the direction (acts so-called tightening). This makes the polishing member 40 more securely locked.

[0043] As described above, the rotary tool main body detachable from the rotary drive shaft, the rotary member fixed to the rotary drive shaft so as to rotate integrally with the rotary drive shaft, and the rotary member There is provided a rotary tool including an elastically deformable bag body attached to the front surface and enclosing a fluid therein. The rotary tool main body has a shape that covers the bag body from the outside, and has a processing part that contacts the processing surface in a state of covering the bag body to calcare the processing surface. The bag body has a shape that holds the rotary tool main body with an internal force by a centrifugal force acting on a fluid in the bag body when rotating integrally with the rotation drive shaft. Further, on the rotating member side, the rotating tool main body is locked to the rotating member side so as to restrict the rotating tool main body held by the bag body from separating from the rotating member in the axial direction. A locking portion is provided.

[0044] In this rotary tool, the centrifugal force that the fluid sealed in the bag receives during rotation, the bag is pressed against the inner surface of the rotary tool body, and the rotary tool body is held by the bag. . Further, the locking portion provided on the rotating member side locks the rotary tool body so that it cannot be removed in the axial direction, so that a decrease in the rotational speed of the bag body is reduced during the processing. When the force is reduced, the bag body force prevents the rotary tool body from falling off. In addition, the engagement between the locking portion and the rotary tool body can be easily performed in a state where the rotary tool is stationary, that is, in a state where centrifugal force does not act on the fluid in the bag body. Furthermore, since the locking force is sufficient to temporarily prevent the rotary tool body from being detached when the centrifugal force is reduced, the structure for the locking can be simple. Therefore, in spite of the addition of the locking structure of the rotating tool body by the locking portion, the attaching / detaching operation of the rotating tool body can be facilitated as compared with the conventional rotating tool that does not use the bag.

[0045] That is, in the rotary tool, the rotation tool utilizes a centrifugal force acting on the fluid in the bag. The structure in which the rotating tool body is held on the rotating member side facilitates the attaching / detaching operation of the rotating tool body with respect to the rotating member, while the rotating tool body is locked by the locking portion provided on the rotating member side. However, when the centrifugal force is reduced, the rotating tool main body is prevented from detaching in the axial direction with respect to the rotating member, and good machining operation is continued.

[0046] Preferably, the locking portion is configured to lock the rotary tool main body so as to allow relative displacement of the rotary tool main body with respect to the rotary member accompanied by deformation of the bag body. The relative displacement can absorb the inclination that may occur between the rotary drive shaft and the machining surface and the vibration that can occur in the tool, and prevent a large reaction force from being applied to the rotary drive shaft side, that is, the operator side. .

[0047] Specifically, the locking portions are respectively provided at a plurality of positions aligned in the rotation circumferential direction of the rotating member, and these locking portions are relative to the rotating member in the axial direction of the rotating tool body. It is suitable for locking the rotary tool body in a state in which the displacement is allowed within a specific range. The relative displacement makes the relative angle of the rotary tool main body with respect to the rotational drive shaft variable within a specific range, thereby enabling the rotary tool main body to flexibly follow the change in the direction of the machining surface.

[0048] When the rotation member is provided with a rotation restricting portion that engages with the rotating tool body and restricts the relative rotation of the rotating tool body with respect to the rotating member, the centrifugal force acting on the fluid in the bag body is provided. Even when the rotation is somewhat reduced, the rotation restricting portion reliably transmits the rotational energy of the rotating member to the rotary tool body, so that the machining efficiency can be kept high.

[0049] Even when relative rotation between the rotary member and the rotary tool main body is restricted in this way, the rotary member is attached to the rotary member so as to be relatively rotatable around the rotary drive shaft with respect to the rotary member. If the locking portion is provided so that the locking member can be rotated relative to the rotary tool main body, the locking portion of the rotary tool main body is provided. It is possible to easily disengage and engage the locking portion and the rotary tool body by using relative rotation.

As an example, a locking portion is provided in the rotary tool body, and a locking member having the locking portion is provided on the back side of the rotating member relative to the rotating member around the rotation drive shaft. It is attached so that it can rotate, and when the locking member is at the first relative rotation angle position with respect to the rotary tool body, it can be fitted to the locked portion in the axial direction, and In the fitted state, the rotary tool body is detached in the axial direction by rotating the rotary tool body relative to the first relative rotational angle position force to the second relative rotation angle position. A rotary tool having a shape for locking the locked portion so as to be impossible is provided. In this rotary tool, when the locking member is at the first relative rotational angle position with respect to the rotary tool main body, the locked portion of the rotary tool main body is in the axial direction at the locking portion of the locking member. Furthermore, after the fitting, the locking portion is locked by the operation of rotating the locking member relative to the rotary tool main body to the second relative rotation angle position. The part is finally locked (that is, the rotary tool body is locked so that it cannot be detached in the direction of the rotating member force axis).

[0051] The specific position of the locking portion on the rotating member side is not particularly limited. Preferably, the rotary tool main body has a locked portion that extends from the portion covering the bag body from the outside to the back side of the rotating member in the axial direction, and locks the locked portion. It is preferable that the locking portion for performing is provided on the back side of the rotating member. The locking portion can lock the rotary tool body on the rotating member side while avoiding interference with the bag body, even though the bag body is provided on the front surface side of the rotating member. .

[0052] Furthermore, the structure in which the rotation restricting portion of the rotating member and the locked portion can be fitted, and the fitting restricts the relative rotation of the rotating tool body with respect to the rotating member. The relative rotation of the rotary tool body can be reliably controlled, and the force is also simplified by the effective use of the locked portion.

[0053] It is preferable that the locked portions are respectively provided at a plurality of positions arranged in the rotational circumferential direction of the rotary tool body. This structure enables the rotary tool body to be more securely locked to the rotary member side. Further, in this structure, providing a rotation restricting portion that fits with each of the locked portions on the outer peripheral portion of the rotating member realizes effective rotation restriction of the rotating tool body.

[0054] For example, the rotation restricting portion can be realized by a simple structure in which a notch is formed in the outer peripheral portion of the rotating member. In this case, provided on the back side of the rotating member is a locking member that has the locking portion and is attached to the rotating member so as to be relatively rotatable around the rotation drive shaft. It is preferable that the locking portion and the locked portion are engaged and disengaged with relative rotation between the locking portion of the member and the locked portion of the rotary tool body. In this structure, the relative rotation of the rotary tool body with respect to the rotary member is restricted, but the locking portion of the locking member and the locked part of the rotary tool body are locked by the rotation operation of the locking member. The unit can be engaged and disengaged.

Claims

The scope of the claims

[1] A rotary tool that is connected to a rotary drive shaft and configured to be attachable to and detachable from the rotary drive shaft.

The rotary tool body, a rotary member fixed to the rotary drive shaft so as to rotate integrally with the rotary drive shaft, and attached to the front side of the rotary member and capable of elastic deformation with a fluid enclosed therein A bag and

The rotary tool main body has a shape that covers the bag body from the outside, and has a processing portion that processes the processing surface by contacting the processing surface in a state of covering the bag body, and the bag body is driven to rotate. The rotary tool body is held from the inside by centrifugal force acting on the fluid in the bag body when rotating integrally with the shaft,

Further, on the rotating member side, the rotating tool main body is locked to the rotating member side so as to restrict the rotating tool main body held by the bag body from separating in the rotating member force axial direction. A rotary tool characterized in that a latching portion capable of performing is provided.

[2] In the rotary tool according to claim 1,

The locking portion is adapted to lock the rotating tool body so as to allow the rotating tool body to be relatively displaced with respect to the rotating member while the bag body is deformed! A rotating tool characterized by

[3] The rotary tool according to claim 2,

The locking portions are respectively provided at a plurality of positions aligned in the rotation circumferential direction of the rotating member, and each locking portion has a relative displacement in the axial direction of the rotating tool body with respect to the rotating member within a specific range. A rotary tool characterized by being adapted to lock the rotary tool body so as to allow it.

[4] In the rotary tool according to any one of claims 1 to 3,

The rotating member is provided with a rotation restricting portion that is engageable with the rotating tool main body and restricts relative rotation of the rotating tool main body with respect to the rotating member by engagement of parentheses. Rotating tool.

[5] The rotary tool according to claim 4,

The rotating portion has the locking portion and the rotating member is located on the rotating member side with respect to the rotating member. A locking member that is mounted so as to be relatively rotatable about the same axis as the moving shaft, and the locking portion and the rotating tool are associated with relative rotation between the locking portion of the locking member and the rotary tool body. A rotary tool characterized in that the main body is engaged and disengaged.

[6] The rotary tool according to claim 5,

The rotating tool body is provided with a locked portion, and the locking member is fitted in the locked portion in the axial direction when the locking member is at a first relative rotational angle position with respect to the rotating tool body. The rotary tool main body is rotated relative to the rotary tool main body from the first relative rotation angle position to the second relative rotation angle position in the fitted state. A rotary tool characterized by having a shape for locking the locked portion so that it cannot be detached in the force axis direction.

[7] In the rotary tool according to any one of claims 1 to 5,

The rotary tool body has a portion that covers the bag body from the outside, and a locked portion that extends from the portion to the back side through the rotating member in the axial direction, and the locking portion is A rotating tool provided on the back side of the rotating member to lock the locked portion.

[8] The rotating tool according to claim 7, wherein the rotating member is provided with a rotation restricting portion that restricts relative rotation of the rotating tool body with respect to the rotating member by fitting with the locked portion. A rotating tool characterized by having

[9] The rotary tool according to claim 8, wherein the locked portions are respectively provided at a plurality of positions aligned in a rotation circumferential direction of the rotary tool main body, and the respective locked portions are provided on an outer peripheral portion of the rotary member. A rotary tool characterized in that a plurality of rotation restricting portions to be fitted respectively are provided.

[10] The rotary tool according to claim 9, wherein each rotation restricting portion includes a notch having a shape that is formed on an outer peripheral edge of the rotating member and can be fitted to each locked portion. tool.

[11] The rotary tool according to claim 9 or 10, wherein the rotary tool has the locking portion and is provided on the back side of the rotary member so as to be rotatable relative to the rotary member about the same axis as the rotary drive shaft. A locking member to be mounted, the locking portion of the locking member and the rotary tool body A rotary tool characterized in that the engaging part and the locked part are engaged and disengaged with relative rotation with the locked part.