JP2018140473A - Snap ring holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a snap ring holder convenient to carry, which is able to cope with mounting tools of various shapes, is able to improve workability, has a simple structure and a reduced number of components, is able to reduce weight and cost, and is able to facilitate mounting.SOLUTION: A snap ring holder comprises: a holding shaft 2 having a mount part 20 on which snap rings 9 are mounted one on another while the mounting part is inserted in the snap rings; a restricting member 3 having a contact stop part 30 extended in parallel to the holding shaft 2 and configured to restrict rotation of each snap ring 9 by contacting and stopping the leading ends of the left and right embracement pieces 91, 91 of the snap ring 9; urging means 4 that urges the plurality of snap rings 9 in an axial direction by means of elastic restoration of a compression coil spring 40 attached to the holding shaft 2; and a contact stop member 5 having a contact stop wall 50 that contacts and stops the urged snap rings 9. In a length area corresponding to the thickness of one snap ring along the axial direction from the end face of an end part 2a of the holding shaft 2, a narrow part 21 is provided, which is less than or substantially equal to the shortest separating distance between the left and right embracement pieces of each snap ring.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a retaining ring holder that can hold a plurality of retaining rings such as an E-shaped retaining ring (E-ring) that is attached to a shaft body from a radial direction, and that can be taken out one by one using an attachment tool.

  Conventionally, as such a retaining ring holder, a desk stand “ET stand” as in Non-Patent Document 1 is known. However, when there is no place for placing a desktop stand in a complex plant, and when attaching retaining rings at a plurality of remote locations, a portable retaining ring holder is required.

  Further, as a portable type, a retaining ring holder having a complicated structure integrated with a mounting tool has been proposed (see Patent Documents 1 and 2). However, there are many places that are difficult to work in the above plants, etc., and it is necessary to select and use various types of attachment tools (straight or bent at the tip) depending on the attachment location. In the case where the retaining ring holder and the mounting tool are integrated as in Patent Documents 1 and 2, it is not only possible to select and use various types of mounting tools as described above, but also the weight is heavy. There may be a problem with workability. In addition, the complicated structure increases the number of parts, which increases the cost.

JP-A-5-69344 JP-A-7-112375

Yamabe Digital Parts Platform, “E-type retaining ring installation tool”, [online], 2002, [Search February 27, 2017], Internet <http://www.110.ne.jp/nejitech/tools_004. html>

  Therefore, in view of the above-described situation, the present invention can cope with various shapes of mounting tools, improve workability, reduce the number of parts with a simple structure, reduce weight, Low cost, operator can hold the retaining ring holder with one hand, and the other hand can hold the mounting tool to take out the retaining ring and easily perform the mounting work. The point is to realize a ring holder.

The present invention includes the following inventions.
(1) A plurality of retaining rings that are attached to the shaft body from the radial direction are held in a state where they can be taken out one by one using an attachment tool for sandwiching the outer periphery of the retaining ring and attaching to the shaft body. A retaining ring holder, a holding shaft having a mounting portion that is mounted in a state where a plurality of retaining rings are passed through each other and overlapped with each other, and extending parallel to the holding shaft, It is attached to the holding shaft, and a regulating member having a stopper part that regulates the rotation of each retaining ring by aligning the left and right holding piece tips of each retaining ring to be mounted and aligns the direction of each retaining ring. A biasing means for biasing a plurality of retaining rings mounted on the mounting portion in an axial direction by an elastic restoring force of the compression coil spring, and an end of the holding shaft facing the biasing direction by the biasing means A retaining ring provided and biased to the end A retaining member having a retaining wall that stops at the position of the retaining shaft, and a length region corresponding to the thickness of one retaining ring along the axial direction from the end face of the end portion of the holding shaft. A narrow part having a width that is smaller than the minimum separation distance between the holding pieces or substantially the same dimension is provided, and the retaining ring at the end located in the narrow part can be taken out from the holding shaft by a mounting tool. When the outermost retaining ring is taken out, the remaining retaining ring attached to the holding shaft is moved in the urging direction by one retaining ring by the urging means, and is always at the outermost end. A retaining ring holder in which a retaining ring can be removed from a holding shaft by the mounting tool through the narrow portion.

  (2) A guide groove for guiding a pair of left and right clamping pieces for clamping an outer peripheral portion of the retaining ring of the attachment tool is provided on the wall surface of the retaining wall facing the holding shaft, and the depth of the guide groove Is set to be substantially the same as the thickness of one of the front and rear grooves of the concave groove with which the outer peripheral portion of the retaining ring formed on the inner clamping surface of the clamping piece is engaged. When the front and back surfaces of the sandwiching piece are pressed against the outermost retaining ring along the bottom surface of the guide groove, the outer periphery of the retaining ring is fitted into the recessed groove, and the retaining ring The retaining ring holder described in (1).

  (3) The retaining ring according to (1) or (2), wherein the narrow portion is a small-diameter portion having an outer diameter that is smaller than or substantially equal to a minimum separation distance between the left and right holding pieces of the retaining ring. holder.

  (4) The urging means includes the compression coil spring and a cylindrical pressing member interposed between the compression coil spring and a retaining ring of the holding shaft, and an outer peripheral portion of the pressing member. A protrusion that can be engaged with a locking groove formed in the restricting member within a predetermined rotation angle range, and the locking groove extends to a position where the pressing member retracts from a mounting portion of the holding shaft. The mounting portion is formed at a predetermined position in the length direction and engageable with the protruding piece at a position moved against the urging force of the compression coil spring, and the protruding piece is engaged with the locking groove. The retaining ring holder according to any one of (1) to (3), wherein the urging force applied to the retaining ring attached to the body is released and the retaining ring can be attached to the attachment portion.

  (5) The restricting member is a substantially L-shaped member in a side view in which a support portion that extends in the direction of the holding shaft and supports the base end side of the holding shaft is provided at the base end portion. A pair of support pieces extend from the left and right side walls of the member toward the base end portion of the restriction member, and the base end portion of the restriction member is pivotally supported between the front end portions of the support pieces, and the restriction member and the holding shaft Is integrally supported so as to be tiltable with respect to the stopper member and the support piece, and the tip of the holding shaft is separated from the stopper wall of the stopper member by the tilting, so that the retaining ring is attached to the mounting portion from the tip. The retaining ring holder according to any one of (1) to (4).

  (6) A positioning pin urged in a protruding direction is provided on at least one of the left and right side surfaces of the restricting member along the axial direction of the holding shaft so as to be able to protrude and retract, and the positioning pin is associated with the corresponding support piece. An engaging hole is provided, and the positioning pin and the engaging hole are provided at positions where the tip of the holding shaft faces the retaining wall of the retaining member in the engaged state, respectively (5) Retaining ring holder.

  According to the retaining ring holder according to the present invention as described above, it can be realized with a simple structure including a holding shaft, a regulating member, a biasing means, and a retaining member, and the number of parts is reduced, and weight reduction and cost reduction are realized. it can. Also, the removable retaining ring located in the narrow part is pressed against the retaining member together with other retaining rings by the urging means, so it is carried while being carried or carried with one hand. It can be stably held without dropping during the operation, and can be easily and easily carried around.

  In addition, since the attachment tool is not integrated, it is possible to select an attachment tool having an optimum shape according to the place where the retaining ring is attached, and take out the retaining ring from the retaining ring holder. Therefore, the workability is improved, and the operator can hold the retaining ring holder according to the present invention with one hand and take out the retaining ring with the other hand and easily perform the attaching work. Become.

  Also, a guide groove for guiding the mounting tool is provided on the wall of the retaining wall, and when the mounting tool is pressed against the outermost retaining ring while keeping the front and back surfaces of the clamping piece along the bottom surface of the guide groove, Since the outer periphery of the retaining ring fits in the concave groove and the retaining ring is clamped, the operation is simple and the structure of the mounting tool and the holder as previously proposed is not integrated. However, the operator can easily and reliably take out the retaining ring by holding the retaining ring holder according to the present invention with one hand and holding the attachment tool with the other hand.

  In addition, the narrow portion is a small diameter portion having an outer diameter that is smaller than or substantially equal to the minimum separation distance between the left and right holding pieces of the retaining ring, and the retaining ring located in the narrow portion can be easily and without resistance. And it can be taken out reliably. This is possible because the urging means presses the retaining ring located in the narrow portion so that it can be prevented from falling off even while being carried.

  The urging means includes a compression coil spring and a cylindrical pressing member interposed between the compression coil spring of the holding shaft and a retaining ring. A projecting piece that can be engaged with a locking groove formed in the regulating member in a rotation angle range is provided, and the locking groove is attached to the compression coil spring to a position where the pressing member is retracted from a mounting portion of the holding shaft. Since it is formed at a predetermined position in the length direction that can be engaged with the protruding piece at a position moved against the force, it is attached to the mounting portion by engaging the protruding piece with the locking groove. The urging force to the retaining ring is released, and the retaining ring can be attached to the attachment portion. Thus, a structure for releasing the urging force by the protruding piece of the pressing member and the locking groove of the regulating member can be realized, and a retaining ring replenishment structure can be realized with a simple structure.

  Further, the regulating member is a substantially L-shaped member in a side view in which a support portion that extends in the direction of the holding shaft at the base end portion and supports the base end side of the holding shaft is provided. A pair of support pieces extend from the left and right side walls toward the base end portion of the restriction member, the base end portion of the restriction member is pivotally supported between the distal end portions of the support pieces, and the restriction member and the holding shaft are integrated. In particular, in the case where the retaining member and the support piece are tiltably supported, the tip of the holding shaft is separated from the retaining wall of the retaining member by tilting, and the retaining ring is easily attached to the mounting portion from the distal end. Can be replenished.

The perspective view which shows the retaining ring holder concerning typical embodiment of this invention. The perspective view which shows a mode that the regulating member and holding shaft of a retaining ring holder are similarly tilted integrally, and a retaining ring is replenished. (A) is the top view of a retaining ring holder similarly, (b) is a side view. (A) is AA sectional drawing of Fig.3 (a), (b) is BB sectional drawing of FIG.3 (b). The side view which shows the state which similarly inclined the regulating member and holding shaft of the retaining ring holder. Explanatory drawing which looked at the retaining wall from the axial direction explaining a mode that a retaining ring is similarly taken out from a retaining ring holder using an installation tool. Explanatory drawing of the principal part which looked at the state which took out a retaining ring similarly from a retaining ring holder using an attachment tool, and looked at the front-end | tip part of the holding shaft from the upper direction.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  The retaining ring holder 1 according to the present invention is a holder that holds a plurality of retaining rings 9 that are attached to the shaft body in the radial direction. As shown in FIG. It is held in a state where it can be taken out one by one using an attachment tool 8 for attachment. The illustrated retaining ring 9 is an E-shaped retaining ring (E-ring), but other than this, for example, a known bow E-shaped retaining ring, crescent-shaped retaining ring, U-shaped retaining ring, K-shaped retaining ring, etc. A known radial direction type retaining ring and other substantially C-shaped retaining rings can be suitably used.

  Moreover, the attachment tool 8 can use what was suitable according to the kind of retaining ring 9, for example, the attachment tool "ET holder" described in the above-mentioned nonpatent literature 1 can be used. As shown in FIG. 6, this mounting tool includes a pair of left and right clamping pieces 81, 81 that clamp the outer periphery of the retaining ring at the tip, and the outer periphery engages the retaining ring on the inner clamping surface of the clamping piece 81. A recessed groove 82 is formed. Any tool other than the “ET holder” can be used as long as it is such a mounting tool.

  Specifically, as shown in FIGS. 1 to 4, the retaining ring holder 1 includes a holding shaft 2 having a mounting portion 20 that is mounted in a state where a plurality of retaining rings 9 are penetrated and overlap each other. The rotation of each retaining ring 9 is regulated by stopping the left and right holding pieces 91, 91 of the retaining ring 9 attached to the retaining shaft 2 and extending parallel to the retaining shaft 2. A plurality of retaining rings 9 attached to the attachment part 20 by the restricting member 3 having the stoppers 30 that align the directions of the retaining rings 9 and the elastic restoring force of the compression coil spring 40 attached to the holding shaft 2. An urging means 4 for urging the holding shaft 2 in the axial direction and an end 2a of the holding shaft 2 facing the urging direction by the urging means 4 are provided so as to face the urging retaining ring 9 with the end 2a. And a stopper member 5 having a stopper wall 50 that stops at the position.

  The holding shaft 2 is formed of a straight cylindrical member and is preferably made of metal, but may be formed of a synthetic resin or other material or a combination of two or more materials. The holding shaft 2 is cantilevered by a support portion 31 of a regulating member 3 described later, and a biasing means 4 composed of a compression coil spring 40 is supported on the base end side supported by the support portion 31. A plurality of retaining rings 9 are attached to each. The outer diameter dimension of the mounting portion 20 of the holding shaft 2 is set to be substantially the same as the inner diameter dimension of the retaining ring 9 except for a narrow portion 21 described later of the distal end portion 2a so that the retaining ring 9 that is mounted does not come off. It is configured.

  The length region corresponding to the thickness of one retaining ring along the axial direction from the end surface of the end 2a of the holding shaft 2 is smaller than or substantially the same as the minimum separation distance h between the left and right holding pieces of the retaining ring 9. A narrow portion 21 having dimensions is provided. As a result, as shown in FIG. 6, the outermost retaining ring 9 located in the narrow portion 21 can be taken out from the holding shaft 2 by the mounting tool 8, and when the outermost retaining ring 9 is taken out, the retaining shaft The remaining retaining ring 9 attached to 2 is moved in the urging direction (front end side) by the urging means 4 by one retaining ring. In this way, the outermost retaining ring can always be taken out from the holding shaft 2 by the attachment tool 8 through the narrow portion 21, and the plurality of retaining rings 9 attached to the holding shaft 2 are sequentially taken out from the front end side. In this example, the narrow portion 21 is a small-diameter portion having an outer diameter that is smaller than or substantially the same as the minimum separation distance h between the left and right holding pieces of the retaining ring 9, but a pair of notches are provided on the left and right. Various configurations, such as providing and configuring, are possible.

  As shown in FIGS. 1, 2, 4, and 5, the regulating member 3 includes a plate-like main body 32 that extends parallel to the holding shaft 2 having the stopper 30, and a base end side of the main body 32. Is extended in the direction of the holding shaft 2 (direction orthogonal to the holding shaft 2) and is configured in a substantially L shape in side view from the same plate-like support portion 31 that supports the base end portion 2b of the holding shaft 2. . The material can be composed of metal, synthetic resin, other materials or combinations. In this example, the main body portion 32 and the support portion 31 are integrally formed, but they may be configured separately and assembled.

  The support portion 31 is provided with a mounting hole 33 into which the base end portion 2 b of the holding shaft 2 is inserted, and a screw hole 34 communicating from the outer surface of the support portion 31 to the inside of the mounting hole 33. A concave groove 2c having a flattened outer peripheral surface is formed (flattened) at a position corresponding to the screw hole 34 of the base end 2b of the holding shaft, and a set screw 61 is screwed into the screw hole 34. The holding shaft 2 is fixed in the support portion 31 so as not to be detached by stopping against the bottom surface of the concave groove 2 c of the holding shaft 2 inserted through the mounting hole 33. In this example, the holding shaft 2 is fixed to the support portion 31 using the set screw 61 as described above, but the present invention is not limited to this, and various fixing means such as an adhesive can be adopted.

  The stopper 30 is configured by a surface (upper surface in this example) facing the holding shaft 2 of the main body 32. A surface functioning as the stopper 30 is formed in parallel to the holding shaft 2. The retaining ring 9 attached to the holding shaft 2 is configured to move in the axial direction by the spring urging force of the urging means 4 in a state in which the left and right holding pieces 91, 91 are restricted in rotation by abutting against the surface. Has been. A locking groove 35 into which a projecting piece 42 of a pressing member 41 of an urging means 4 to be described later engages is provided at a predetermined position in the axial direction at a predetermined position on the upper surface of the main body 32 that is continuous with the stopper 30. ing.

  The urging unit 4 includes a compression coil spring 40 and a cylindrical pressing member 41 interposed between the compression coil spring 40 of the holding shaft 2 and the retaining ring 9. The pressing member 41 is provided with a projecting piece 42 that can be engaged with the locking groove 35 formed in the main body portion 32 of the regulating member 3 in a predetermined rotation angle range on the outer peripheral portion. The material of the pressing member 41 can be composed of metal, synthetic resin, other materials, or a combination. The locking groove 35 of the regulating member 3 that engages with the protruding piece 42 is a position where the pressing member 41 has moved against the urging force of the compression coil spring 40 to a position where the pressing member 41 is retracted from the mounting portion 20 of the holding shaft 2. It is formed at a predetermined position that can be engaged with the protruding piece 42. Thus, by engaging the projecting piece 42 with the locking groove 35, the urging force to the retaining ring 9 mounted on the mounting portion 20 is released as shown in FIGS. The retaining ring 9 can be attached to the portion 20.

  In this example, the projecting piece 42 is configured to have a shape in which a part of the outer periphery of the annular plate portion is cut out straight, and the cut-out portion 42a is formed in the retaining portion 30 of the restriction member 3 by rotation. The engagement shaft 35 is disengaged by setting the angle position to be parallel to the upper surface of the stopper 30 and the holding shaft 2 is controlled to rotate by the stopper 30 as in the case of the retaining ring 9. It is possible to move in the axial direction. Further, by rotating at the position of the locking groove 35 and setting the notch portion 42a to an angle position deviated from the above position, the projecting piece 42 is engaged with the locking groove 35 to be engaged. In this example, the annular plate portion having the cutout portion 42a is used. However, a projection portion that partially engages the locking groove 35 may be provided instead of the annular shape.

  A guide groove 51 that guides a pair of left and right clamping pieces 81 that clamps the outer peripheral portion of the retaining ring 9 of the mounting tool is provided on the wall surface of the retaining wall 50 facing the holding shaft 2. The depth of the guide groove 51 is set to be substantially the same as the thickness of one of the front and rear of the concave groove 82 to which the outer peripheral portion of the retaining ring formed on the inner clamping surface of the clamping piece 81 is engaged. As a result, as shown in FIG. 6, the mounting tool 8 is moved to the outermost retaining ring 9 </ b> A (9) with the surface 83 on one side of the front and rear sides of the holding piece 81 along the bottom surface of the guide groove 51. When pressed, the outer periphery of the retaining ring 9A fits into the concave groove, and the retaining ring is clamped. Further, by pulling out the attachment tool 8, it is possible to take out the retaining ring 9A while holding it, and it is possible to attach the retaining ring to the shaft body using the attachment tool 8 as it is.

  A pair of support pieces 52, 52 extend from the left and right side walls of the stopper member 5 toward the base end portion 3 b of the regulating member 3. In this example, a substantially L-shaped plate material in plan view is supported on the left and right side walls of the stopper member 5 using the mounting screws 62 and 63, but the present invention is not limited to this. And the base end part 3b of the control member 3 is pivotally supported between the front-end | tip parts 52a and 52a of this pair of support piece. Specifically, a screw 64 is screwed into the screw hole of the base end portion 3b from the distal end portion 52a side through an annular sliding member 65, and can be tilted about the screw 64 and the sliding member 65 as a pivot. It is supported.

  In this manner, the regulating member 3 and the holding shaft 2 are supported so as to be integrally tiltable with respect to the stopper member 5 and the support piece 52, and as shown in FIGS. The retaining shaft 2 is tilted so that the distal end portion 2a of the retaining shaft is separated from the retaining wall 50 of the retaining member, whereby a new retaining ring 9 can be replenished to the mounting portion 20 from the distal end portion 2a. .

  Positioning pins 36 are provided on the left and right side surfaces of the restricting member 3 along the axial direction of the holding shaft 2 so as to be able to protrude and retract in a state of being biased in the protruding direction. At a position corresponding to the positioning pin 36, an engaging hole 520 into which the positioning pin 36 is engaged is provided. The positioning pin 36 is urged by a compression coil spring 37 built in a hole formed in the main body 32 of the restricting member 3 as shown in FIG. 4B, and resists the urging force of the coil spring 37. By pushing the tip of the pin into the hole, the engagement state with the engagement hole 520 can be released.

  The positioning pin 36 and the engagement hole 520 are respectively provided at positions where the tip of the holding shaft 2 faces the retaining wall 50 of the retaining member 5 in the engaged state. The positioning pin 36 and the engagement hole 520 are engaged with each other in a normal posture where the positioning member 36 can be taken out, and the positioning member 3 and the holding shaft 2 are not tilted with respect to the stopper member 5 and the support piece 52, so that stable positioning is achieved. It is configured to be.

  Similarly, an arc-shaped curved groove 521 having a predetermined angle range centered on the pivot formed on the support piece 52 is formed on at least one of the left and right side surfaces of the regulating member 3 along the axial direction of the holding shaft 2. An engaging rotation restricting pin 38 protrudes, and the range of tilting of the restricting member 3 relative to the support piece 52 is restricted to a predetermined angle range.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can of course be implemented in various forms without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Retaining ring holder 2 Holding shaft 2a, 2b End part 2c Groove 3 Restricting member 3b End part 4 Energizing means 5 Stopping member 8 Mounting tool 9, 9A Retaining ring 20 Mounting part 21 Narrow part 30 Stopping part 31 Support Part 32 Body 33 Mounting hole 34 Screw hole 35 Locking groove 36 Positioning pin 37 Coil spring 38 Rotation restricting pin 40 Coil spring 41 Pressing member 42 Projection piece 42a Notch 50 Stopping wall 51 Guide groove 52 Support piece 52a End 520 engagement hole 521 curved groove 61 set screw 62, 63 mounting screw 64 shaft screw 65 sliding member 81 clamping piece 82 concave groove 83 surface 90 outer peripheral part 91 holding piece h distance

Claims (6)

A retaining ring holder that holds a plurality of retaining rings that are attached to the shaft body from the radial direction so that the retaining ring can be taken out one by one using an attachment tool that sandwiches the outer periphery of the retaining ring and attaches to the shaft body Because
A holding shaft having a mounting portion that is mounted in a state in which a plurality of retaining rings are penetrated and overlapped with each other;
The rotation of each retaining ring is regulated by aligning the direction of each retaining ring by extending in parallel with the retaining shaft and stopping the left and right holding piece tips of each retaining ring attached to the retaining shaft. A regulating member having a stopper,
A biasing means for biasing a plurality of retaining rings mounted on the mounting portion in an axial direction by an elastic restoring force of a compression coil spring mounted on the holding shaft;
A retaining member provided to face the end portion of the holding shaft in the urging direction by the urging means and having a retaining wall that urges the biased retaining ring at the position of the end portion. ,
The width of one retaining ring along the axial direction from the end face of the end portion of the holding shaft to a length region that is smaller than or substantially equal to the minimum separation distance between the left and right holding pieces of the retaining ring A narrow portion having
When the outermost retaining ring located in the narrow portion can be taken out from the holding shaft by an installation tool, and the outermost retaining ring is taken out, the remaining retaining ring attached to the holding shaft is A retaining ring holder that is moved in the urging direction by one retaining ring by the urging means, and that the outermost retaining ring can always be taken out from the holding shaft by the mounting tool through the narrow portion.   A guide groove for guiding a pair of left and right clamping pieces for clamping the outer peripheral portion of the retaining ring of the mounting tool is provided on the wall surface of the retaining wall facing the holding shaft, and the depth of the guide groove It is set to be substantially the same as the thickness of one of the front and rear of the concave groove to which the outer peripheral portion of the retaining ring formed on the inner clamping surface of the clamping piece is engaged. When the one of the front and rear surfaces is pressed against the outermost retaining ring along the bottom surface of the guide groove, the outer periphery of the retaining ring is fitted into the recessed groove, and the retaining ring is clamped. The retaining ring holder according to claim 1.   The retaining ring holder according to claim 1 or 2, wherein the narrow portion is a small-diameter portion having an outer diameter that is smaller than or substantially equal to a minimum separation distance between the left and right holding pieces of the retaining ring. The urging means includes the compression coil spring and a cylindrical pressing member interposed between the compression coil spring and a retaining ring of the holding shaft,
On the outer peripheral portion of the pressing member, a projecting piece that can be engaged with a locking groove formed in the regulating member within a predetermined rotation angle range is provided,
The locking groove is a predetermined position in the length direction that can be engaged with the projecting piece at a position where the pressing member moves against the urging force of the compression coil spring to a position where the pressing member retracts from the mounting portion of the holding shaft. Formed into
4. The urging force applied to the retaining ring attached to the attachment part is released by engaging the protrusion with the locking groove, and the retaining ring can be attached to the attachment part. The retaining ring holder according to item 1. The restricting member is a substantially L-shaped member in a side view in which a base portion is provided with a support portion that extends in the direction of the holding shaft and supports the base end side of the holding shaft.
A pair of support pieces extend from the left and right side walls of the stopper member toward the base end of the restricting member,
The base end portion of the restricting member is pivotally supported between the distal end portions of the support pieces, and the restricting member and the holding shaft are integrally supported to be tiltable with respect to the stopper member and the support piece,
The retaining ring holder according to any one of claims 1 to 4, wherein a retaining ring can be attached to the attachment portion from the distal end by separating the distal end of the holding shaft from the retaining wall of the retaining member by the tilting. .   A positioning pin urged in a protruding direction is provided on at least one of the left and right side surfaces of the restricting member along the axial direction of the holding shaft so as to protrude and retract, and the positioning pin is engaged with the corresponding support piece. 6. A retaining ring according to claim 5, wherein a fitting hole is provided, and the positioning pin and the engaging hole are respectively provided at positions where the tip of the holding shaft faces the retaining wall of the retaining member in the engaged state. holder.

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