Retaining ring installation tool

Abstract

To suppress detachment of a retaining ring.SOLUTION: A retaining ring installation tool comprises: a support part which has a flat shape extending in one direction, and supports an outer periphery and one surface of a retaining ring by a tip in the one direction; and a plate body which extends in the one direction and faces the support part, and performs switching between a first position covering the other surface of the retaining ring and a second position exposing the other surface of the retaining ring by moving in the one direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a retaining ring installation tool. [Background technology]

[0002] Patent document 1 describes a press-in blade of a retaining ring press-in device that is slidably mounted on the base of the retaining ring press-in device, and has a pair of arms extending from a base in the sliding direction, with both arms having a support portion and an engagement portion at their tips, and an engagement groove in the sliding direction that is narrower than the diameter of a pilot pin fixed to the base side spanning between both arms, and when the press-in blade is in the retracted position, the pilot pin engages with the engagement groove and both arms expand, allowing the retaining ring to be mounted on the support portion of the press-in blade, while when the press-in blade is in the advanced position, the pilot pin disengages from the engagement groove, allowing the retaining ring to be clamped by the engagement portion of the press-in blade and pressed into the portion to be pressed in. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 04-009227 Summary of the Invention [Problem to be solved by the invention]

[0004] Some retaining rings are supported on one side and the outer periphery by the tip of a flat support part that extends in one direction. If the support part deteriorates due to wear, the retaining ring may come off from the other side opposite the one side.

[0005] An object of the present disclosure is to provide a retaining ring installation tool that prevents the retaining ring from coming off. [Means for solving the problem]

[0006] A retaining ring installation tool according to a first aspect of the present disclosure includes a support portion that is flat and extends in one direction and supports the outer periphery and one face of the retaining ring at a tip in the one direction, and a plate body that extends in the one direction and faces the support portion, and that can be switched between a first position that covers the other face of the retaining ring and a second position that exposes the other face of the retaining ring by moving in the one direction.

[0007] A retaining ring attachment tool according to a second aspect of the present disclosure is the retaining ring attachment tool of the first aspect, in which the tip of the support portion is pressed in a direction intersecting the one direction.

[0008] A retaining ring installation tool according to a third aspect of the present disclosure is the retaining ring installation tool of the second aspect, wherein the plate body is concavely curved so that both ends are located on the support portion side in a free state, and the tool is provided with a correction member that presses the plate body in a direction to correct the curvature of the plate body.

[0009] A retaining ring attachment tool according to a fourth aspect of the present disclosure is the retaining ring attachment tool of the first aspect, wherein the plate body is pressed toward the first position by an elastic force of an elastic member provided on the support portion.

[0010] A retaining ring attachment tool according to a fifth aspect of the present disclosure is the retaining ring attachment tool of the fourth aspect, wherein the support portion includes an adjustment portion that adjusts the elastic force of the elastic member.

[0011] A retaining ring attachment tool according to a sixth aspect of the present disclosure is the retaining ring attachment tool of the first aspect, wherein the plate body is tapered at the end in the one direction on the side covering the retaining ring.

[0012] A retaining ring installation tool according to a seventh aspect of the present disclosure is a retaining ring installation tool according to any one of the first to sixth aspects, which is cylindrical extending in the one direction and has a guide portion therein that guides the plate body in the one direction relative to the support portion. Effect of the Invention

[0013] According to the retaining ring attachment tool according to the first aspect of the present disclosure, the retaining ring is prevented from coming off, compared to a configuration in which the other surface of the retaining ring supported by the support portion is always exposed.

[0014] According to the retaining ring installation tool according to the second aspect of the present disclosure, the plate body comes into contact with the retaining ring regardless of the shape error of the retaining ring.

[0015] According to the retaining ring attachment tool according to the third aspect of the present disclosure, a restoring force is generated in the plate body.

[0016] According to the retaining ring attachment tool according to the fourth aspect of the present disclosure, switching from the second position to the first position is performed without requiring any operating force.

[0017] According to the retaining ring attachment tool according to the fifth aspect of the present disclosure, the pressing force of the plate body can be adjusted.

[0018] According to the retaining ring attachment tool according to the sixth aspect of the present disclosure, it is easier to attach the retaining ring to the tool compared to a configuration in which one end of the plate body has a constant plate thickness.

[0019] According to the retaining ring attachment tool according to the seventh aspect of the present disclosure, the plate body is prevented from shifting from the support portion, compared to a configuration in which the plate body is freely movable relative to the support portion. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is an overall perspective view of the retaining ring attachment tool according to the embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of a portion of the retaining ring attachment tool according to the embodiment. [Diagram 3] 1A is a side view of a retaining ring attachment tool according to the present embodiment, and FIG. 1B is a schematic representation of a side surface of a plate body according to the present embodiment. [Figure 4] 1A is an enlarged perspective view showing the tip portion of the retaining ring attachment tool according to this embodiment, and FIG. 1B is an enlarged perspective view showing the state in which the retaining ring is supported by the retaining ring attachment tool according to this embodiment. [Diagram 5]FIG. 2 is a cross-sectional view of the retaining ring attachment tool according to the embodiment. [Figure 6] 1A is a side cross-sectional view showing the state before the retaining ring is supported by the retaining ring attachment tool of this embodiment, FIG. 1B is a side cross-sectional view showing the state after the retaining ring is supported by the retaining ring attachment tool of this embodiment and the plate body has moved in the depth direction, and FIG. 1C is a side cross-sectional view showing the state after the retaining ring is supported by the retaining ring attachment tool of this embodiment and the plate body covers the upper surface of the retaining ring. [Figure 7] FIG. 1A is a side cross-sectional view showing the state of the retaining ring attachment tool of this embodiment supporting the retaining ring before attaching the retaining ring to the attachment object, FIG. 1B is a side cross-sectional view showing the state of the retaining ring attachment tool of this embodiment attaching the retaining ring to the attachment object, and FIG. 1C is a side cross-sectional view showing the state of the retaining ring attachment tool of this embodiment after attaching the retaining ring to the attachment object. [Figure 8] FIG. 13 is a top view showing a modified example of the retaining ring attachment tool according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] A retaining ring attachment tool according to the present embodiment will be described in detail with reference to Fig. 1 to Fig. 8. Specifically, an example of a retaining ring attachment tool that supports a retaining ring and is used to attach the supported retaining ring to a shaft member will be described.

[0022] In addition, the arrow L shown in the figure indicates the longitudinal direction of the tool (also referred to as the depth direction in this specification), and the arrow W indicates the width direction of the tool. Moreover, the arrow H indicates the vertical direction, which is the up-down direction of the tool in an orientation in which the depth direction and width direction are horizontal. The depth direction is one example of one direction. Moreover, the up-down direction, width direction, and depth direction are perpendicular to each other. In this specification, the above directions will be used for explanation, but the orientation of the tool is not limited to these directions.

[0023] [Retaining ring installation tool 100] The retaining ring installation tool 100 (hereinafter referred to as "tool 100") is a tool for installing a retaining ring 200 on a shaft member, and has a support part 120 that supports the retaining ring 200 at a tip part 122, a plate body 140 that faces the support part 120 in the vertical direction, and an elastic mechanism 160 that presses the plate body 140 against the tip part 122 of the support part 120, an accommodating part 150 that accommodates a part of the support part 120, a part of the plate body 140 and the elastic mechanism 160, and a gripping part 110 that fixes the accommodating part 150 and is gripped by an operator, as shown in FIG. 1.

[0024] 1, the retaining ring 200 is an E-ring (JIS B 2805), and has an outer peripheral surface 200a and an inner peripheral surface 200b that are arc-shaped, and three projections 202 that protrude inward of the retaining ring 200 are formed on the inner peripheral surface 200b. The retaining ring 200 also has a lower surface 200c that faces downward, and an upper surface 200d that faces upward. The outer peripheral surface 200a, the lower surface 200c, and the upper surface 200d are examples of the outer periphery, one surface, and the other surface, respectively.

[0025] [Support part 120] As shown in Figs. 1 and 4, the support part 120 is a flat plate extending from one end (left end in the figure) in the depth direction of the storage part 150 described later to one side in the depth direction (left side in the figure), and is formed using a metal material. In this embodiment, the flat plate shape may be simply referred to as plate-like or flat. The plate surface of the support part 120 is flat facing the up-down direction. The support part 120 supports the outer peripheral surface 200a and the lower surface 200c of the retaining ring 200 at its tip in the depth direction. The support part 120 has a main body part 121, a tip part 122, and a flange 123.

[0026] 1 and 5, the main body 121 constitutes the main body of the support part 120 and is in the form of a plate extending in the depth direction. The length in the width direction of the main body 121 is equal to the length in the width direction of the plate body 140 described later and is shorter than the length in the width direction of the retaining ring 200. A tip portion 122 is formed continuously (integrally formed) at one end side in the depth direction of the main body 121, and a flange 123 is formed continuously near the center in the depth direction.

[0027] As shown in FIG. 5, cylindrical protrusions 128a and 128b protruding upward in the vertical direction are configured (formed) on the upper surface of the main body 121 on the other end 129 side in the depth direction from a flange 123 described later. The protrusions 128a and 128b may be attached to the upper surface of the main body 121 using screws or the like. The protrusions 128a and 128b are spaced apart from each other in the depth direction. The position of the protrusion 128b in the depth direction on the main body 121 determines the movement limit of one end side (protruding side) in the depth direction of a plate body 140 described later. The sizes (diameters) of the protrusions 128a and 128b are preferably the same, equivalent or similar, and are configured to be located inside an opening 140e described later.

[0028] 4(A), the tip portion 122 is configured on one end side of the main body portion 121 and supports the retaining ring 200. The tip portion 122 has a notch portion 120a, a slit 130, and divided portions 122a and 122b. The length of the tip portion 122 in the width direction is formed to be longer than the length of the main body portion 121 in the width direction.

[0029] The cutout portion 120a is formed on one end side in the depth direction of the tip portion 122, and is a semicircular cutout when viewed from above. An imaginary center line CL01 along the depth direction of the tool 100 passes through the center of the semicircle of the cutout portion 120a.

[0030] 1, the slit 130 is a groove that divides the tip portion 122 and a part of the body portion 121 in the depth direction in the width direction. The slit 130 is composed of a groove portion in the tip portion 122 and another groove portion in the body portion 121 that is formed larger in the width direction than the groove portion.

[0031] The divided portions 122a, 122b are a pair of regions divided in the width direction by slits 130 at the tip portion 122. The divided portions 122a, 122b elastically deform in the width direction together with a part of the main body portion 121 divided in the width direction by slits 130, thereby approaching and separating from each other in the width direction and supporting the outer circumferential surface 200a and the lower surface 200c of the retaining ring 200 as the support portion 120. The divided portions 122a, 122b are symmetrical with respect to the center line CL01.

[0032] As shown in Fig. 4(A) and (B), the divided parts 122a, 122b are respectively formed with first support surfaces 124a, 124b and second support surfaces 126a, 126b. The first support surfaces 124a, 124b are formed in an arc shape that supports the outer peripheral surface 200a of the other end part in the depth direction of the retaining ring 200 from the width direction, and face the center of the notch part 120a when viewed from above. The second support surfaces 126a, 126b are surfaces that protrude from the lower ends of the first support surfaces 124a, 124b toward the center side of the notch part 120a and face upward, and support the lower surface 200c of the other end part in the depth direction of the retaining ring 200 from below. In other words, the first support surfaces 124a and 124b are a pair of surfaces that sandwich, in the width direction, the outer peripheral surface 200a of the other end portion in the depth direction of the retaining ring 200. The second support surfaces 126a and 126b are a pair of surfaces on which the other end portion in the depth direction of the retaining ring 200 is placed. The second support surfaces 126a and 126b are formed to a size that is hidden by the retaining ring 200 in a state in which the retaining ring 200 is supported.

[0033] In this configuration, with tip portion 122 supporting retaining ring 200, one end portion of retaining ring 200 in the depth direction protrudes from tip portion 122 to one end side in the depth direction (the left end side in the figure) as shown in Fig. 4(B). The amount of protrusion of retaining ring 200 from tip portion 122 is set to d1. Moreover, the length in the width direction of the portion of retaining ring 200 protruding from tip portion 122 is set to b1. Furthermore, the thickness of retaining ring 200 is set to t1.

[0034] As shown in FIG. 5, the flange 123 is a plate that protrudes outward in the width direction of the main body 121 near the center of the main body 121 in the depth direction beyond the other parts of the main body 121.

[0035] [Plate 140] As shown in FIG. 2 and FIG. 5, the plate body 140 is in the form of a plate extending in the depth direction, and is formed using a metal material. The plate body 140 faces the support part 120, and has one end 140a and the other end 140b in the depth direction. The length of the width direction of the plate body 140 is configured to be equal to the length of the width direction of the main body part 121 in the support part 120. The plate body 140 can be moved (slid) on the support part 120 in the depth direction to switch its position. As shown in FIG. 6(C), the plate body 140 covers a part of the upper surface 200d of the retaining ring 200 supported by the tip part 122 at a first position P1 on the side of the one end 140a in the depth direction. The end part of the one end 140a is an example of an end part. The thickness of the plate body 140 in the vertical direction is configured to be equal to the thickness t1 of the retaining ring 200. 6B, the thickness of the plate body 140 is slightly thicker than the thickness t1 of the retaining ring 200. In other words, the thickness of the plate body 140 is thicker than the thickness of the support portion 120.

[0036] As shown in FIG. 3(A), the other end 140b side in the depth direction of the plate body 140 is accommodated in the accommodation section 150 described later. Also, as shown in FIG. 3(B) in a schematic manner, the plate body 140 is in contact with the ground surface G at the one end 140a and the other end 140b side before being assembled into the tool 100, in a state (free state) where the plate body 140 is arranged on the ground surface G, which is a plane. Furthermore, the center of the plate body 140 is curved more concavely than the one end 140a and the other end 140b so that the one end 140a and the other end 140b are positioned on the ground surface G, which is regarded as the support section 120. In a state where the plate body 140 is assembled into the tool 100, the center of the plate body 140 is pressed by a downward surface inside the accommodation section 150 described later, so that the curvature is corrected, the plate body 140 is deformed along the support section 120, and at least the one end 140a presses the tip end 122 of the support section 120 downward in the vertical direction. The end portion on the one end 140a side is tapered on the side covering the retaining ring 200 of the plate body 140. The end portion on the one end 140a side is an example of a taper.

[0037] 5, a notch 140c is formed in the other end 140b of the plate body 140. One end of a compression coil spring 162, which will be described later, is positioned in the notch 140c. The plate body 140 is pressed toward a first position P1 in the depth direction by the elastic force of the compression coil spring 162.

[0038] The plate body 140 has an opening 140e on the other end 140b side in the depth direction, which is formed in a long hole shape in the depth direction and opens in the vertical direction. The protrusions 128a and 128b of the support part 120 are arranged inside the opening 140e. When a part of the protrusion 128a contacts one side edge E2 of the opening 140e, the support part 120 is in a maximum storage position where it is maximally stored in the storage part 150 described later, and one end 140a of the plate body 140 is located at a position P2. When a part of the protrusion 128b contacts the other side edge E1 of the opening 140e, the support part 120 is in a protruding position where it protrudes from the storage part 150 described later, and the other end 140b of the plate body 140 is located at a first position P1 (see FIG. 6(A)). In other words, the length of the opening 140e in the depth direction determines the moving distance of the support part 120 in the depth direction together with the protrusions 128a and 128b.

[0039] [Storage section 150] 2, the accommodation portion 150 is formed to extend in the depth direction, and has a cylindrical main body portion and a connection portion 152 formed on the outer periphery of the main body portion. A part of the support portion 120, a part of the plate body 140, and a part of the elastic mechanism 160 described later are housed inside the main body portion. The connection portion 152 is connected to a connected portion (not shown) of the grip portion 110, and in this embodiment, the connection portion 152 is a male screw. In addition, the accommodation portion 150 presses the plate body 140 downward on a downward surface opposite to the upper surface of the support portion 120. That is, the plate body 140 is disposed between the opposing surfaces of the downward surface and the upper surface of the support part 120 (slightly wider than the thickness of the plate body 140), and both ends in the depth direction of the plate body 140 (one end 140a and the other end 140b) press the support part 120 downward, while the center of the plate body 140 presses the downward surface upward, so that the accommodating part 150 corrects the curvature of the plate body 140. The accommodating part 150 is an example of a correction member. Furthermore, the accommodating part 150 guides the movement of the plate body 140 in the depth direction relative to the support part 120 on both side surfaces in the internal width direction. That is, the accommodating part 150 is an example of a guide part.

[0040] [Elastic mechanism 160] As shown in FIG. 5, the elastic mechanism 160 has a box-shaped main body portion having a through hole in the depth direction, a compression coil spring 162 whose other end is supported by the main body portion, and a set screw 164 that seals the other end of the through hole. The compression coil spring 162 and the set screw 164 are examples of an elastic member and an adjustment portion, respectively. A female thread 166 is formed inside the through hole. In this embodiment, the elastic mechanism 160 is described as being independent from the support portion 120, but the elastic mechanism 160 may be integrated with the support portion 120. One end of the elastic mechanism 160 in the depth direction supports the other end 129 of the support portion 120, and the other end of the elastic mechanism 160 in the depth direction is supported by the grip portion 110 described later.

[0041] One end of the compression coil spring 162 in the depth direction is positioned in the notch 140c of the plate body 140, and the other end is in contact with the tip of the set screw 164 inside the elastic mechanism 160. The spring constant of the compression coil spring 162 is set so that the operator does not apply excessive pressing force to the tool 100 when the plate body 140 is pressed against the shaft member S or the mounting object O described later. The compression coil spring 162 is assembled to the tool 100 in a state compressed from its natural length (the compression coil spring 162 is compressed and deformed when the plate body 140 hits the protrusion 128b as a stopper). In this embodiment, the compression coil spring 162 is in a state compressed from its natural length even when the one end 140a of the plate body 140 is located at the first position P1.

[0042] The set screw 164 is inserted from the other side of the through hole of the elastic mechanism 160 and seals the through hole from the other side. The elastic force of the compression coil spring 162 is adjusted according to the position of the set screw 164. The set screw 164 has a male thread 165 formed on its outer periphery and is connected to a female thread 166 of the through hole of the elastic mechanism 160. The set screw 164 has a hole into which an installation tool (not shown) can be inserted, and the hole faces the outside of the through hole of the elastic mechanism 160. In this embodiment, the hole is hexagonal, and the installation tool is, for example, a hexagonal wrench.

[0043] [Gripping part 110] The grip portion 110 is cylindrical and extends in the depth direction as shown in Fig. 1. The grip portion 110 is a portion of the tool 100 that is gripped by an operator. As shown in Fig. 2, the grip portion 110 supports the elastic mechanism 160 via a columnar portion 170. The grip portion 110 is also formed with a connected portion (not shown) that can be connected to the connection portion 152 of the storage portion 150. In this embodiment, the connected portion is an internal thread.

[0044] The tool 100 is configured as described above.

[0045] [Function of tool 100] Next, a description will be given of the operation of the tool 100. As shown in Fig. 6(A), before the retaining ring 200 is clamped by the tool 100, one end 140a of the plate body 140 is located at a first position P1. Note that hereinafter, P1 to P4 are the positions of the one end 140a of the plate body 140 relative to the support part 120.

[0046] 6(B), the multiple retaining rings 200 are attached to the shaft member S so that the openings of the retaining rings 200 are aligned. The shaft member S is configured so that the lowest retaining ring 200 among the multiple retaining rings 200 (hereinafter referred to as the “target retaining ring 200”) can be removed from the shaft member S with the tool 100.

[0047] When the tool 100 is pushed toward the shaft member S in the depth direction, the retaining ring 200, which is located up-down above the target retaining ring 200, comes into contact with one end 140a of the plate body 140. After the retaining ring 200 comes into contact with the one end 140a, the one end 140a retreats to a second position P3 on the other end side in the depth direction (the right side in the figure) as the tool 100 is pushed in, and the plate body 140 exposes the upper surface 200d of the target retaining ring 200. At this time, the target retaining ring 200 is clamped between the first support surfaces 124a and 124b (see FIG. 6(A)).

[0048] Then, as shown in Fig. 6(C), when the operator pulls out the entire tool 100 with the target retaining ring 200 clamped between the first support surfaces 124a, 124b from the shaft member S side along the depth direction, the plate body 140 returns (moves forward) to one end side in the depth direction (left side in the figure) as the operator pulls it out. Next, the end portion of the plate body 140 on the one end 140a side covers the upper surface 200d of the target retaining ring 200. The lower surface 200c of the target retaining ring 200 is supported by the second support surfaces 126a, 126b (see Fig. 4(B)).

[0049] 7, the mounting of the target retaining ring 200 to the mounting target O will be described. As shown in Fig. 7(A), a tool 100 that clamps and supports the target retaining ring 200 is prepared.

[0050] 7(B), when the object retaining ring 200 is attached to the attachment object O, which is a shaft member, when one end 140a of the plate body 140 comes into contact with the attachment object O, the plate body 140 retreats to position P4 on the other end side in the depth direction (the right side in the figure). Position P4 is a position determined according to the diameter of the attachment object O.

[0051] 7(C), after the target retaining ring 200 is attached to the attachment target O, the tool 100 is moved in a direction away from the attachment target O. As the tool 100 moves, the plate body 140 returns to the first position P1.

[0052] With the above, the attachment of the target retaining ring 200 to the attachment target O by the tool 100 is completed.

[0053] 〔summary〕 The tool 100 includes a support part 120 that is flat and extends in the depth direction and supports an outer peripheral surface 200a and a lower surface 200c of a retaining ring 200 at one end 140a in the depth direction, and a plate body 140 that extends in the depth direction, faces the support part 120, and switches between a first position P1 and a second position P3 by moving in the depth direction. This configuration suppresses the retaining ring 200 from coming off, compared to a configuration in which an upper surface 200d of the retaining ring 200 supported by the support part 120 is always exposed.

[0054] Furthermore, since the plate body 140 of the tool 100 presses the tip portion 122 of the support portion 120 in the vertical direction, the plate body 140 comes into contact with the retaining ring 200 regardless of the shape error of the retaining ring 200 .

[0055] Moreover, the plate body 140 in the tool 100 is curved in a concave shape so that one end 140a and the other end 140b are located on the support part 120 side in a free state, and has both side surfaces in the width direction inside the accommodation part 150 that press the plate body 140 in a direction to correct the curvature of the plate body 140. According to this configuration, a restoring force is generated in the plate body 140.

[0056] Furthermore, since the plate 140 of the tool 100 is pressed toward the first position P1 by the elastic force of the compression coil spring 162, switching from the second position P3 to the first position P1 is performed without requiring any operating force.

[0057] Furthermore, the plate body 140 in the tool 100 has a taper formed on the side covering the upper surface 200d of the retaining ring 200 at the end 140a in the depth direction, so that it is easier to attach the retaining ring 200 to the tool 100 compared to a configuration in which the end of the plate body 140 in the depth direction has a constant plate thickness.

[0058] Next, the tool 100 is provided with a set screw 162 for adjusting the elastic force of the compression coil spring 162, so that the pressing force of the plate body 140 can be adjusted.

[0059] Furthermore, tool 100 is cylindrical and extends in the depth direction, and has both widthwise side surfaces of storage section 150 that guides plate body 140 in the depth direction relative to support section 120 inside. Therefore, misalignment of plate body 140 relative to support section 120 is suppressed compared to a configuration in which plate body 140 can move freely relative to support section 120.

[0060] Although the present disclosure has been described in detail with respect to a specific embodiment, the present disclosure is not limited to such an embodiment, and various other embodiments are possible within the scope of the present disclosure.

[0061] Modifications of the tool 100 The width of the plate 140 is configured to be equal to the width of the support 120, but is not limited thereto. For example, the width of the plate 140 may be configured to be shorter than the width of the support 120. In this case, the plate 140w may be disposed at the center of the support in the width direction as shown in FIG. 8(A), or the plate 140x may be disposed at one end of the support 120 in the width direction as shown in FIG. 8(B). In either case, the weight of the tool 100 is lighter than a configuration in which the width of the plate 140 is equal to the width of the support 120. The width of the plate 140 may be longer than the width of the support 120.

[0062] Although the plate body 140 has been described as being plate-shaped, this is not limiting. For example, as shown in Fig. 8(C) and (D), the plate body 140 may be configured as a frame-shaped plate body 140y or a plate body 140z having one end 140a formed in a claw shape.

[0063] The elastic mechanism 160 has the set screw 164, but is not limited to this. For example, instead of the set screw 164, a plurality of rod-shaped bodies having different lengths may be inserted into the through-hole of the elastic mechanism 160 by appropriately replacing the rod-shaped bodies.

[0064] In the above embodiment, an E-ring has been used as an example of the retaining ring 200, but the retaining ring may be a C-ring or the like.

[0065] In the above embodiment, the protrusions 128a and 128b are a part of the configuration of the support part 120, but this is not limited thereto. For example, a separate columnar body may be fixed to an opening in the main body part 121. The storage part 150 is configured to guide the movement of the plate body 140 in the depth direction relative to the support part 120 on both side surfaces in the width direction inside, but the guide part is not limited to the storage part 150. The protrusions 128a and 128b may function as the guide part.

[0066] <Additional Notes> (((1))) a support portion that is flat and extends in one direction and supports an outer periphery and one surface of the retaining ring at a tip end in the one direction; a plate body extending in the one direction, facing the support portion, and switchable between a first position covering the other surface of the retaining ring and a second position exposing the other surface of the retaining ring by moving in the one direction; A retaining ring installation tool comprising: (((2))) The plate body presses the tip of the support part in a direction intersecting the one direction. The retaining ring installation tool described in (((1))). (((3))) The plate body is curved in a concave shape so that both ends are located on the support portion side in a free state, A straightening member is provided to push the plate body in a direction to straighten the curvature of the plate body. The retaining ring installation tool described in (((2))). (((4))) The plate body is pressed against the first position by an elastic force of an elastic member provided on the support portion. The retaining ring installation tool according to any one of (((1))) to (((3))). (((5))) The support portion includes an adjustment portion for adjusting the elastic force of the elastic member. The retaining ring installation tool described in (((4))). (((6))) The plate body has an end portion in the one direction, the end portion being tapered on a side covering the retaining ring. The retaining ring installation tool according to any one of (((1))) to (((5))). (((7))) The plate member has a cylindrical shape extending in the one direction and includes a guide portion therein for guiding the plate member in the one direction relative to the support portion. The retaining ring installation tool according to any one of (((1))) to (((6))).

[0067] According to the configuration (((1))), the retaining ring is prevented from coming off, compared to a configuration in which the other surface of the retaining ring supported by the support portion is always exposed. According to the configuration (((2))), the plate body comes into contact with the retaining ring regardless of the shape error of the retaining ring. According to the configuration (((3))), a restoring force is generated in the plate body. According to the configuration (((4))), switching from the second position to the first position is performed without requiring any operating force. According to the configuration of (((5))), the pressing force of the plate body can be adjusted. According to the configuration (((6))), it is easier to attach the retaining ring to the tool than in a configuration in which one end of the plate body has a constant plate thickness. According to the configuration (((7))), displacement of the plate body relative to the support portion is suppressed compared to a configuration in which the plate body is able to move freely relative to the support portion. [Explanation of symbols]

[0068] 100 tools 110 Gripping part 120 Support part 122 Tip 130 Slit 140 Plate 150 Storage section (an example of a straightening member or guide section) 162 Compression coil spring (an example of an elastic member) 164 Setscrew (an example of an adjustment part) 200 retaining ring

Claims

1. a support portion that is flat and extends in one direction and supports an outer periphery and one surface of the retaining ring at a tip end in the one direction; a plate body extending in the one direction, facing the support portion, and switchable between a first position covering the other surface of the retaining ring and a second position exposing the other surface of the retaining ring by moving in the one direction; A retaining ring installation tool comprising:

2. The plate body presses the tip of the support part in a direction intersecting the one direction. The retaining ring installation tool according to claim 1.

3. The plate body is curved in a concave shape so that both ends are located on the support portion side in a free state, A straightening member is provided to push the plate body in a direction to straighten the curvature of the plate body. The retaining ring installation tool according to claim 2.

4. The plate body is pressed toward the first position by an elastic force of an elastic member provided on the support portion. The retaining ring installation tool according to claim 1.

5. The support portion includes an adjustment portion for adjusting the elastic force of the elastic member. The retaining ring installation tool according to claim 4.

6. The plate body has an end portion in the one direction, the end portion being tapered on a side covering the retaining ring. The retaining ring installation tool according to claim 1.

7. The plate member has a cylindrical shape extending in the one direction and includes a guide portion therein for guiding the plate member in the one direction relative to the support portion. The retaining ring installation tool according to any one of claims 1 to 6.

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