JP2007054933A - Rotary tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein the possibility of falling of a rotary tool main body from a rotary driving shaft side when rotating speed is lowered in the rotary tool holding the rotary tool main body by utilizing centrifugal force of fluid in a bag body. <P>SOLUTION: The bag body 30 is mounted on a front surface of an adapter 20 rotating integrally with the rotary driving shaft, and the rotary tool main body 40 is mounted at the outside. The bag body 30 is filled with a fluid, and the bag body 30 holds the rotary tool main body 40 from the inside by the centrifugal force acting on the fluid. A locking member 50 for locking the rotary tool main body 40 is provided on the adapter 20 side. By the locking, separation of the rotary tool main body 40 from the adapter 20 in the axial direction is regulated when the rotating speed is lowered. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rotary tool such as an abrasive member configured such that a tool body can be attached to and detached from a rotary drive shaft.

  In general, a rotary tool that processes a work surface while rotating at a high speed is detachably mounted on a rotary drive shaft connected to a drive source such as a motor and is appropriately replaced. Conventionally, screw-type fasteners such as bolts and nuts are frequently used as means for detachably attaching the rotary tool to the rotary drive shaft (Patent Document 1).

  However, when the rotary tool is mounted on the rotary drive shaft using screws as described above, the mounting structure is naturally complicated, and the cost is inevitable. In addition, a jig for turning the screw is separately required for attaching and detaching the grindstone, and the rotating operation is very troublesome. In particular, when the rotating tool is rotated at a high speed, it is necessary to strongly tighten the screw to withstand the centrifugal force, and the replacement work becomes more troublesome.

Therefore, in Patent Document 2, an elastically deformable bag body is attached to the rotation drive shaft side and a fluid is sealed in the bag body, and the bag is utilized by utilizing a centrifugal force acting on the fluid during the rotation. An apparatus is disclosed in which a rotating tool body is held from the inside by causing the body to bulge radially outward.
JP 2001-225274 A JP 2003-145432 A

  Since the rotary tool described in Patent Document 2 holds the rotary tool body using the centrifugal force of the fluid in the bag, for example, when the rotational speed is reduced due to a large rotational resistance during processing. In addition, the centrifugal force and thus the force for holding the rotary tool main body is reduced, which may cause the rotary tool main body to fall off the rotary drive shaft side.

  As means for solving the above-mentioned problems, the present invention provides a rotary tool that is connected to a rotary drive shaft and is configured such that a rotary tool body can be attached to and detached from the rotary drive shaft. A main body, a rotary member fixed to the rotary drive shaft so as to rotate integrally with the rotary drive shaft, and an elastically deformable bag body attached to the front side of the rotary member and enclosing a fluid therein The rotary tool body has a shape that covers the bag body from the outside, and the bag body rotates with the rotary drive shaft by centrifugal force acting on the fluid in the bag body when rotating integrally with the rotary drive shaft. Is held from the inside, and further on the rotating member side, the rotating tool body held by the bag body is rotated so as to restrict the rotating tool main body from being detached from the rotating member in the axial direction. Tool body on the rotating member side In which the locking portion for locking is provided.

  According to this configuration, the rotary tool body can be held by pressing the bag body against the inner surface of the rotary tool body using the centrifugal force received during rotation by the fluid sealed in the bag body. In addition to this, the locking portion provided on the rotating member side locks the rotary tool body so that it cannot be removed in the axial direction. When the force becomes weak, it is possible to prevent the rotary tool main body from dropping from the bag body. In addition, since the engagement between the locking portion and the rotary tool body can be performed in a stationary state, that is, in a state where centrifugal force does not act on the fluid in the bag body, the operation for the engagement is easy. Since the locking may be of a level that temporarily prevents the rotary tool body from being detached when the centrifugal force is reduced, the structure for the locking may be simple. Therefore, even if the locking structure of the rotary tool body by the locking part is added, the attaching / detaching operation of the rotary tool body can be facilitated as compared with the conventional rotary tool not using the bag.

  Further, the locking portion can be configured to lock the rotary tool body so as to allow relative displacement of the rotary tool body with respect to the rotating member accompanied by deformation of the bag. With such a configuration, even when an inclination occurs between the rotary drive shaft and the surface to be machined or when vibration occurs in the tool, this is absorbed by the relative displacement of the tool body with respect to the rotating member and rotated. It is possible to prevent a large reaction force from being applied to the drive shaft side, that is, the worker side.

  For example, the locking portions are provided at a plurality of positions aligned in the rotation circumferential direction of the rotating member, and these locking portions allow the relative displacement in the axial direction of the rotating tool body with respect to the rotating member to be within a specific range. If the rotary tool main body is to be locked in an allowable state, the relative angle of the rotary tool main body with respect to the rotary drive shaft can be made variable within a specific range by the relative displacement. It can be configured to flexibly follow changes in the orientation of the processed surface.

  In addition, if the rotation member is provided with a rotation restricting portion that engages with the rotation tool main body and restricts the relative rotation of the rotation tool main body with respect to the rotation member, the centrifugal force acting on the fluid in the bag body is increased. The rotational energy of the rotating member can be reliably transmitted to the rotating tool main body even if it is somewhat reduced, and the machining efficiency can be kept high.

  Thus, even when relative rotation between the rotating member and the rotating tool main body is restricted, a locking member is provided on the rotating member side so as to be relatively rotatable around the rotation drive shaft with respect to the rotating member. If the locking member is provided with a locking portion so that relative rotation between the locking portion provided on the locking member and the rotary tool body is possible, the relative rotation is used to Engagement / disengagement between the locking portion and the rotary tool body can be facilitated.

  For example, the rotary tool main body is provided with a locked portion, and a locking member having the locking portion on the back side of the rotating member can be rotated relative to the rotating member around the rotation drive shaft. The locking member can be fitted in the axial direction with the locked portion when the locking member is at the first relative rotation angle position with respect to the rotary tool body, and the fitting In this state, when the relative rotation operation is performed on the rotary tool body from the first relative rotation angle position to the second relative rotation angle position, the rotary tool body cannot be detached from the rotary member in the axial direction. If the locking member is configured to lock the locked portion, the locking member is engaged with the locking member positioned at the first relative rotational angle position with respect to the rotary tool body. The locked part of the rotary tool body is fixed to the stop part in the axial direction. Further, from this state, the locking member rotates the locking member relative to the rotary tool main body to the second relative rotation angle position, so that the locking portion makes the locked portion main. It can be in a state of being locked (that is, locked so that the rotary tool main body cannot be detached from the rotating member in the axial direction).

  Although the specific position of the engaging part on the rotating member side is not particularly limited, the rotating tool main body extends from the portion covering the bag body from the outside to the back side through the rotating member in the axial direction. If it has the structure which has a to-be-latched part and the latching | locking part which latches this to-be-latched part is provided in the back side of the said rotation member, the bag body provided in the front side of the said rotation member It is possible to lock the rotary tool body on the rotating member side while avoiding interference with the rotating member.

  Furthermore, if the rotation restricting portion of the rotating member is fitted to the locked portion to restrict the relative rotation of the rotary tool body with respect to the rotating member, the locked portion is effectively used. The relative rotation of the rotary tool main body with respect to the rotary member can be reliably restricted with a simple structure.

  Here, it is possible to more reliably lock the rotary tool body to the rotating member side by adopting a configuration in which the locked portion is provided at a plurality of positions aligned in the rotation circumferential direction of the rotary tool body. In that case, the rotation restriction of the rotary tool body can be effectively performed by providing a rotation restriction portion fitted to each of the locked portions on the outer peripheral portion of the rotation member.

  And this rotation control part can be comprised by the simple structure of forming a notch in the outer peripheral part of the said rotation member, for example.

  Also in this case, a locking member having the locking portion is attached to the back side of the rotating member so as to be relatively rotatable around the rotation drive shaft with respect to the rotating member. If the engaging part and the locked part are engaged and disengaged with relative rotation of the locking part of the rotating tool body and the locked part of the rotating tool body, the rotating tool body with respect to the rotating member Although the relative rotation of the locking member is restricted, the locking portion of the locking member and the locked portion of the rotary tool main body can be engaged and disengaged by rotating the locking member.

  As described above, according to the present invention, the rotating tool body is attached to and detached from the rotating member by using the centrifugal force acting on the fluid in the bag to hold the rotating tool body on the rotating member side. By providing a locking portion for locking the rotary tool main body on the rotating member side, the rotary tool main body is detached from the rotating member in the axial direction when the centrifugal force is reduced. There is an effect that it is possible to prevent this and continue a good machining operation.

  A first embodiment of the present invention will be described with reference to the drawings.

  The illustrated rotary tool includes an adapter 20 that is a rotary member, a bag 30, and a polishing member 40 that is a rotary tool body. The adapter 20 is fixed to a rotary drive shaft 10 as shown in FIG. 2B, and the bag body 30 is attached to the adapter 20.

  The rotary drive shaft 10 integrally includes a shaft body 12 connected to a drive source (not shown) and a screw shaft portion 14 on the tip side. The screw shaft portion 14 has a smaller diameter than the shaft main body 12, and a male screw is formed on the outer peripheral surface thereof. Further, a machining liquid supply hole 16 for supplying a machining liquid to the shaft tip side is provided on the rotation center axis of the rotary drive shaft 10.

  The adapter 20 is formed of a relatively strong material 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 rotational drive shaft 10, and a circumferential groove 22a for mounting a bag body 30 to be described later is provided on the front surface (lower surface in FIG. 1). The substrate portion 22 is provided with a plurality of (three in the illustrated example) bolt insertion holes 22b penetrating the substrate portion 22 in the thickness direction, and for inserting a fluid injection plug 38 described later. An injection plug insertion hole 22c is provided.

  The boss portion 24 has a substantially cylindrical shape penetrating the central portion of the substrate portion 22 in the axial direction, and an internal thread 24a is formed on the inner peripheral surface thereof. Then, the female screw 24 a is screwed with the screw shaft portion 14 of the rotary drive shaft 10 and tightened, whereby the adapter 20 is fixed to the rotary drive shaft 10.

  An end wall 26 that closes the front end side opening is formed at the front end portion (lower end portion in FIG. 1) of the boss portion 24, and a plurality of machining fluid injection holes 26a that penetrate the end wall 26 in the axial direction. Is provided.

  The bag 30 is made of a material having high elasticity such as rubber (for example, natural rubber, urethane rubber, elastomer), and has a bag shape with an internal space opened rearward (upward in FIG. 1). And in the state which put suitable fluid (for example, water) in the interior space, it fixes to the adapter 20 so that the said open part may be plugged up.

  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, an outer peripheral wall 33 extending rearward from the outer peripheral portion of the front wall 32, An auxiliary wall 34 that extends radially inward from the rear end of the outer peripheral wall 33 is integrally formed, and the whole forms an annular shape that surrounds the end wall 26 of the adapter 20 from the radially outer side. Wedge portions 35, 36 protrude radially inward from the rear ends of the inner peripheral wall 31 and the auxiliary wall 34, and these wedge portions 35, 36 are inserted into the peripheral groove 22 a using the fixing plate 27 and the bolts 28. Fixed.

  The wedge portions 35 and 36 are formed at positions that are respectively fitted into the radially inner portion and the outer portion of the circumferential groove 22a. Among these, the front surface of the wedge portion 35 is a tapered surface 35a whose diameter increases toward the rear end (upper end in FIG. 1), and the front surface of the wedge portion 36 is a taper whose diameter decreases toward the rear end. It is set as the surface 36a.

  The fixing plate 27 has a donut plate shape that is fitted into the radially inner portion of the circumferential groove 22a, and the inner and outer peripheral portions thereof can abut against the tapered surfaces 35a and 36a of the wedge portions 35 and 36, respectively. Tapered surfaces 27a and 27b having various shapes are formed. Then, the fixing plate 27 is fastened to the bottom surface side (upper surface side in FIG. 1) of the circumferential groove 22a by the bolt 28 in a state where the tapered surfaces are in pressure contact with each other (that is, fastened to the adapter 20 side). The bag body 30 is fixed to the adapter 20 in a state where the open portion is closed by the fixing plate 27.

  Specifically, as shown in FIG. 2B, unillustrated screw holes provided in the fixing plate 27 by inserting the bolts 28 from above into the bolt insertion holes 22 b provided in the adapter 20. Then, the fixing plate 27 is fastened to the adapter 20, and the wedge portions 35 and 36 of the bag body 30 are sandwiched between the fixing plate 27 and the adapter 20.

  A fluid injection plug 38 is inserted into the injection plug insertion hole 22c provided in the adapter 20 from above and is screwed into a screw hole 27c (FIG. 1) provided in the fixing plate 27. The fluid can be injected from the outside into the bag body 30 through the plug 38 and the screw hole 27c.

  The polishing member 40 includes a polishing support member 41 made of an elastic material similar to the bag body 30 and a polishing plate 42 attached to the front surface (lower surface in FIG. 1) of the polishing support member 41. ing.

  As shown in FIG. 3, the polishing support member 41 includes a donut plate-shaped front side wall 44 that covers the front wall 32 of the bag body 30 from the front side, and a bag body that extends rearward from the inner peripheral edge of the front side wall 44. The inner peripheral wall 45 that is externally fitted to the inner peripheral wall 31 of the 30 from the radially inner side and the thick outer peripheral wall 46 that covers the outer peripheral wall 33 of the bag body 30 from the radially outer side are integrally provided. The polishing plate 42 is fixed to the front side wall 44 with an adhesive or the like.

As shown in FIG. 4, the polishing plate 42 has a large number of protrusions 42a on its surface, and these protrusions 42a contain abrasive grains for polishing. As 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 (phenol resin, melamine resin, polyurethane resin, epoxy resin, polyester resin, a mixture thereof, etc.) are suitable. Similarly, abrasive grains that are used in ordinary grinding wheels can be applied. For example, diamond, cubic boron nitride (CBN), silicon carbide (SiC), aluminum oxide (Al ₂ O ₃ ), Alternatively, a mixture of these is preferable.

  As a feature of the polishing member 40, a plurality of (three in the illustrated example) engaged portions 47 extending rearward from the rear end (upper end in FIG. 1) of the outer peripheral wall 46 are formed at equal intervals in the circumferential direction. . These locked portions 47 have a shape that can protrude 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, and the protruding end portion thereof is in the radial direction. An outwardly-engaged projection 47a is formed, and a protruding portion 48 that projects outward in the radial direction is formed in the vicinity of the latched projection 47a. The relative rotation of the polishing member 40 with respect to the adapter 20 is restricted by the engagement of each of the locked portions 47 and the corresponding notch 22d.

  In addition, the rotary tool main body of the rotary tool according to the present invention is not limited to the polishing member 40 having the illustrated structure. For example, an abrasive using a sintered metal powder as a binder or a buff used for final finishing may be used.

  On the other hand, a locking member 50 for locking the polishing member 40 to the adapter 20 side is provided on the back side of the adapter 20 (upper surface side in FIG. 1).

  As shown in FIGS. 5 and 6, the locking member 50 includes a donut plate-like body wall 52 having a through hole 51 in the center, and forward (downward in FIG. 1) from the outer peripheral edge of the body wall 52. An extending peripheral wall 54 is integrally provided.

  The main body wall 52 is attached to the adapter 20 side so as to be rotatable around the boss portion 24 in a posture in which the boss portion 24 of the adapter 20 is inserted into the through-hole 51. The substrate part 22 is covered from the back side. Further, a snap ring 60 for preventing the main body wall 52 from coming off in the axial direction is mounted immediately behind the main body wall 52 (upward in FIG. 1).

  As shown in FIGS. 1 and 5, the main body wall 52 is provided with a through hole 53 through which the fluid injection plug 38 is inserted, and the through hole 53 serves as the locking member 50 for the adapter 20. In order to enable relative rotation of the lens, a long hole extending in the rotation circumferential direction is formed.

  On the other hand, the peripheral wall 54 is provided with a locking portion for locking each locked portion 47 provided on the polishing member 40. Specifically, a bulging portion 55 and a locking groove 56 adjacent to the bulging portion 55 in the circumferential direction are formed at positions corresponding to the respective locked portions 47 in the peripheral wall 54. ing.

  As shown by the mesh in FIG. 5A, the bulging portion 55 has a shape that locally bulges outward in the radial direction as compared with other portions, and the rear end portion of the locked portion 47 is the It is formed in a shape that can be received (inserted) in the axial direction, including the locked protrusion 47a.

  Each locking groove 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 penetrating in the radial direction and has a width dimension (vertical dimension in FIG. 5A) larger than the thickness of the locked projection 47a. Further, a recess 58 into which the protruding portion 48 of each locked portion 47 can be fitted is formed at a position corresponding to the center position in the circumferential direction of each locking groove 56 on the inner peripheral surface of the peripheral wall 54.

  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 of the locked projections 47a is pivoted on each of the bulging portions 55. The engaging member 50 can be inserted in the direction, and the engaging member 50 is rotated relative to the polishing member 40 from the first relative rotational angle position to the second relative rotational angle position in the fitted state ( In the example shown in the figure, the locked projection 47a enters the locking groove 56 by relative rotation in a counterclockwise direction when viewed from the main body wall 52 side, and the front side wall ( 5A is in contact with the locked protrusion 47a, it is possible to prevent the polishing member 40 from coming off from the adapter 20 and the bag body 30 in the axial direction, and the locking groove 56. Width dimension and thickness dimension of the locked projection 47a Axial relative displacement of the abrasive member 40 relative to the adapter 20 and the locking member 50 is adapted to be tolerated by the differential.

  In addition, at the second relative rotation angle position, the protrusion 48 of the locked portion 47 is fitted into the recess 58 of the locking member 50, so that the first relative rotation angle position causes the first relative rotation angle position. The backward movement of the locking member 50 to the relative rotation angle position of 1 is suppressed.

  Next, how to use the rotary tool will be described.

  First, in a state where the rotary drive shaft 10 and the adapter 20 connected thereto shown in FIG. 2B are stationary, the polishing member 40 is placed on the outer side of the bag 30 attached to the adapter 20. Then, the polishing member 40 is locked to the adapter 20 side. Specifically, in a state where the locking member 50 is positioned at the first relative rotation angle position with respect to the polishing member 40, the front end side (see FIG. 5 (a), each locked portion 47 is inserted in the axial direction (including the locked protrusion 47a) from the lower end side, and the locking member 50 is further moved to the polishing member 40 from the inserted state. By relatively rotating to the second relative rotation angle position side, the locked protrusion 47a of the locked portion 47 enters the locking groove 56 of the locking member 50, and the concave portion of the locking member 50 The protrusion 48 of the locked portion 47 is fitted into 58.

  At this stage, the centrifugal force is not acting on the fluid in the bag body 30, so that the polishing member 40 and the locking member 50 can be easily engaged.

  Next, a drive source such as a motor connected to the rotary drive shaft 10 is operated to rotate the entire rotary tool integrally with the rotary drive shaft 10. At this time, the outer peripheral wall 33 of the bag body 30 presses the outer peripheral wall 46 of the polishing member 40 from the inside in the radial direction by a centrifugal force acting on the fluid sealed in the bag body 30, and the pressing member causes the polishing member 40 to move. It will be held on the bag 30 side. Moreover, the holding force becomes stronger as the rotation speed of the rotary tool becomes higher, that is, as the centrifugal force acting on the fluid increases, and the holding of the polishing member 40 becomes more reliable. Thus, the processed surface can be polished by pressing the protrusion 42a of the polishing plate 42 of the polishing member 40 against the processing surface while rotating the entire rotary tool at a high speed. Further, during the machining, the machining fluid is ejected from the center of the tool from the machining fluid supply hole 16 in the rotary drive shaft 10 through the machining fluid ejection hole 26a of the adapter 20, so that, for example, the machining fluid is sprayed from the outside of the tool. Therefore, the machining liquid can be supplied to the machining surface more efficiently and effectively.

  Here, if a large rotational resistance is generated during the polishing process and the rotational speed of the rotary tool is remarkably reduced, the centrifugal force acting on the fluid in the bag body 30 and the polishing member 40 due to the centrifugal force are correspondingly reduced. In the past, there was a risk that the polishing member 40 would fall off from the bag body 30 and the adapter 20 in the axial direction. When the locked protrusion 47a enters the locking groove 56 on the locking member 50 side and the locked protrusion 47a hits the front side wall 57 of the locking groove 56, the polishing member 40 is locked. Since it is locked to the member 50 and is prevented from coming off from the adapter 20, it is possible to maintain a state in which polishing can be performed regardless of the decrease in the rotational speed.

  In particular, in this embodiment, the relative rotation of the polishing member 40 with respect to the adapter 20 is restricted by fitting the locked portions 47 into the notches 22d of the adapter 20, so that the rotation speed is reduced. Thus, even if the holding force of the polishing member 40 by the bag 30 is reduced, the rotational energy of the adapter 20 can be reliably transmitted to the polishing member 40 and the processing efficiency can be kept high. In addition, while the relative rotation between the adapter 20 and the polishing member 40 is restricted in this way, the locking member 50 is provided so as to be relatively rotatable with respect to the adapter 20, thereby utilizing the relative rotation. The engagement / disengagement work between the locking member 50 and the polishing member 40 can be facilitated.

  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 axis of the polishing member 40 relative to the locking member 50 and the adapter 20 is the difference. Since the relative displacement in the direction is allowed within a specific range, the relative angle of the polishing member 40 with respect to the rotary drive shaft 10 can be varied within the specific range by the relative displacement and the elastic deformation of the bag body 30. Thereby, it can be set as the structure which the grinding | polishing board 42 of the said grinding | polishing member 40 can flexibly follow the change of the direction of a process surface.

  In the present invention, the locking member 50 is not necessarily required. For example, the locked protrusion 47a of each locked portion 47 is protruded inward rather than radially outward, so that the locked protrusion 47a is formed. Even if it is hooked on the back surface (upper surface in FIG. 1) of the adapter 20, the polishing member 40 can be simply locked to the adapter 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 detached from the adapter 20, whereas the diameter is as illustrated. If the outwardly-engaged locked projection 47a is engaged with the peripheral wall 54 of the locking member 50 from the inside, the internal pressure pushes the locked projection 47a against the peripheral wall 54 of the locking member 50. Since it acts in the attaching direction (acts so-called tightening), it is possible to secure the polishing member 40 more reliably.

It is a section perspective view of a rotary tool concerning an embodiment of the invention. (A) is a rear view which shows the adapter of the said rotary tool, (b) is a partial cross section side view which shows the adapter and the rotational drive shaft connected with this. (A) is a perspective view which shows the grinding | polishing member of the said rotary tool, (b) is the back view, (c) is the cross-sectional side view. (A) is the front view of the said polishing member, (b) is the side view. (A) is a perspective view which shows the locking member of the said rotary tool, (b) is the back view. (A) is the sectional view on the AA line of (c), (b) is the sectional view on the BB line of (c), (c) is a front view of the said locking member.

Explanation of symbols

10 Rotating Drive Shaft 12 Shaft Body 20 Adapter (Rotating Member)
22 substrate portion 22d notch 24 boss portion 27 fixing plate 30 bag body 40 polishing member 47 locked portion 47a locked protrusion 50 locking member 52 body wall 54 peripheral wall 55 bulging portion 56 locking groove 57 front of locking groove Side wall

Claims (11)

A rotary tool connected to a rotary drive shaft and configured to be attachable to and detachable from the rotary drive shaft.
The rotary tool main 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 elastically deformable with fluid enclosed therein With a bag body,
The rotary tool body has a shape that covers the bag body from the outside, and the bag body rotates from the inside by centrifugal force acting on the fluid in the bag body when rotating integrally with the rotation drive shaft. It has a shape to hold,
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 being separated from the rotating member in the axial direction. A rotary tool characterized in that a stop is provided.   The rotary tool according to claim 1, wherein the locking portion locks the rotary tool body so as to allow the rotary tool body to be relatively displaced with respect to the rotary member while being deformed by the bag body. A rotating tool characterized by that.   The rotary tool according to claim 2, wherein the locking portions are provided at a plurality of positions aligned in a rotation circumferential direction of the rotating member, and these locking portions are in an axial direction of the rotating tool main body with respect to the rotating member. A rotating tool characterized in that the rotating tool main body is locked in a state in which the relative displacement is allowed within a specific range.   The rotary tool according to any one of claims 1 to 3, wherein the rotary member is provided with a rotation restricting portion that engages with the rotary tool main body and restricts relative rotation of the rotary tool main body with respect to the rotary member. A rotating tool characterized by   5. The rotary tool according to claim 4, wherein a locking member having the locking portion is attached to the rotating member side so as to be relatively rotatable about the rotation drive shaft with respect to the rotating member. A rotary tool configured to be engaged and disengaged between the locking portion and the rotary tool main body while being relatively rotated with the locking portion of the locking member and the rotary tool main body.   6. The rotary tool according to claim 5, wherein a locked portion is provided in the rotary tool body, and the locked member is in the first relative rotation angle position with respect to the rotary tool body. Rotating 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 and capable of being fitted in the axial direction. A rotary tool having a shape for locking the locked portion so that the tool main body cannot be detached from the rotary member in the axial direction.   The rotary tool according to any one of claims 1 to 5, wherein the rotary tool main body extends from the portion covering the bag body from the outside to the back side through the rotary member in the axial direction. And a locking portion for locking the locked portion is provided on the back side of the rotating member.   The rotary tool according to claim 7, wherein the rotary member is provided with a rotation restricting portion that restricts relative rotation of the rotary tool main body with respect to the rotary member by fitting with the locked portion. Rotating tool.   9. The rotary tool according to claim 8, wherein the locked portion is provided at a plurality of positions aligned in a rotation circumferential direction of the rotary tool main body, and the rotation is engaged with each locked portion on an outer peripheral portion of the rotating member. A rotating tool characterized in that a regulating portion is provided.   The rotary tool according to claim 9, wherein each rotation restricting portion is formed by a notch formed in an outer peripheral edge of the rotary member.   The rotary tool according to claim 9 or 10, wherein a locking member having the locking portion on the back side of the rotating member can be rotated relative to the rotating member about the same axis as the rotation drive shaft. The engaging portion is attached and engaged with and disengaged between the engaging portion and the locked portion with relative rotation between the locking portion of the locking member and the locked portion of the rotary tool body. A rotating tool characterized by that.

Images