JP2002331469A - Snap ring mounting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a snap ring mounting tool allowing easy and sure mounting of a snap ring with a simple constitution. SOLUTION: This tool is provided with a body part 1 and an operation part 2 oscillatable by being pivotally attached to a base end part of the body part 1. The body part 1 is provided with a holding rod 5 externally insertable by making the directions of a plurality of snap rings A, etc., uniform, a presser 6 for pressing and energizing the plurality of snap rings A, etc., externally inserted into the holding rod 5 from the base end side to a tip end side and a deterring face 10 for deterring the plurality of snap rings A, etc., pressed and energized with clearance corresponding to thickness of a sheet of the snap ring A with a tip surface of the holding rod 5. The operation part 2 is provided with an operating piece 18a advancing and retreating between the tip surface of the holding rod 5 and the deterring face 10 according to the oscillating operation of the operation part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining ring mounting tool for fitting a retaining ring such as a C type or an E type into a groove provided around an end of a shaft.

[0002]

2. Description of the Related Art Conventionally, a ring having a shape in which a part of a thin-walled annular body which is cut out and which is detachably fitted into a groove provided around an end of a shaft is known. is called.
This retaining ring has an outer dimension larger than the outer diameter of the shaft, an inner dimension larger than the groove diameter of the shaft, and a notch width smaller than the groove diameter of the shaft. Widely used.

[0003] As this type of snap ring mounting tool, for example, a tool described in Japanese Utility Model Publication No. 47-12230 is known. As shown in FIG. 4, the retaining ring mounting tool disclosed in this publication includes a main body 50 having a grip portion 51 (not shown below) and a holding rod 53 into which a plurality of retaining rings A are externally inserted. A holding portion 52 provided to be swingably attached to the main body portion 50 by a pivot 54;
Operation unit 55 which is swingably attached to main body 50 at 6
And a configuration including:

A tension spring 57 having one end attached to the rear end of the holding portion 52 is hung on a pivot 54 and a rotation shaft 58, and the other end is attached to a pusher 59 which is slidably inserted outside the holding rod 53. Are pushed forward by the pushers 59 and are aligned along the holding rods 53. Further, an L-shaped receiving piece 60 is attached to the front end of the main body 50, and a first arc-shaped concave portion 60 a that holds one cutting ring A at the forefront is provided at the tip of the receiving piece 60.
In addition, a second arc-shaped concave portion 60b slightly smaller than the first arc-shaped concave portion 60a, and a notch groove 60c into which the tip of the holding rod 53 that swings with the swing of the holding portion 52 are formed.

[0005] When the retaining ring A is mounted, the shaft B to be mounted is inserted between the distal end of the operating portion 55 and the distal end of the receiving piece 60, and the cutting ring A and the groove C of the shaft B are aligned with each other. The operating unit 55 is pushed downward in the state of being confronted. Then, the second and subsequent retaining rings A,... Integrated by the shaft B and the holding rod 53 are pushed downward to enter the second arc-shaped concave portion 60b and the cut groove 60c, respectively. A is restricted from moving downward by the first arc-shaped concave portion 60a. As a result, the groove C of the shaft B is pushed into the retaining ring A at the most distal end, and the retaining ring A at the most distal end is inserted into the groove C. It will be fitted and mounted.

[0006]

However, the above-mentioned conventional retaining ring mounting tool has a structure in which the shaft B is simply sandwiched between the distal end of the operating portion 55 and the distal end of the receiving piece 60, so that the shaft B is held by the holding rod 53. In this case, not only can the retaining ring A be in an oblique posture with respect to the groove C of the shaft B but the mounting part cannot be mounted, but also the operating part 55 is forcibly pushed from this state. , Or the retaining ring 53 is likely to be damaged. This problem is caused by the short axis B from the groove C to the tip.
Is more remarkable.

Further, even if the tip of the receiving piece 60 is not damaged, it is inevitable that the holding surface of the first arc-shaped concave portion 60a gradually wears and the step with the cut groove 60c disappears.
In this case, since the first arc-shaped concave portion 60a cannot hold the leading-edge retaining ring A, the leading-edge retaining ring A slides on the abraded surface as the operating portion 55 is pushed in, and the second and subsequent retaining rings A slide. .. Are only pushed down integrally with the retaining rings A,...

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a snap ring mounting tool which has a simple structure and can easily and securely mount a snap ring.

[0009]

In order to solve the above-mentioned problems, a snap ring mounting tool according to the present invention comprises a main body 1 and a swingable operating portion which is pivotally attached to a base end side of the main body 1. , And a plurality of retaining rings A,... Which can be externally inserted into the main body 1 with a plurality of retaining rings A aligned in the same direction, and a plurality of retaining rings A,. A plurality of retaining rings A pressed and urged from the end side to the distal end side, and a presser 6 having a distance corresponding to the thickness of one retaining ring A and the distal end surface of the holding rod 5; Are provided on the operating portion 2, and an operating piece that moves forward and backward between the distal end surface of the holding rod 5 and the restraining surface 10 with the swinging operation of the operating portion 2 is provided. 18a
Is provided.

According to the retaining ring mounting tool having the above-described configuration, the operating piece 18a enters between the distal end surface of the holding rod 5 and the stopping surface 10 as the operating portion 2 is swung toward the main body 1 side. I do. Between the tip end surface of the holding rod 5 and the restraining surface 10, there is a leading-edge retaining ring A that is not extrapolated to the holding rod 5. The retaining ring A maintains this position by the urging force of the pusher 6, but is discharged from this position by the entry of the operation piece 18a. At this time, by disposing the shaft B in the discharging direction of the retaining ring A, the discharged retaining ring A is mounted in the groove C of the shaft B. When the operation piece 18a is retracted, the pusher 6
All the retaining rings A,... Move to the tip side by the urging force of
The retaining ring A, which is the second, is the end surface of the holding rod 5 and the stop surface 10.
And the stop ring A to be mounted next.

Further, in the retaining ring mounting tool according to the present invention, in order to restrict the radial movement of the shaft B when the retaining ring A is mounted, the retaining ring 5 is attached to the main body 1. It is possible to adopt a configuration in which the receiving piece 14 facing the operation piece 18a with the distal end face and the restraining face 10 interposed therebetween is provided. According to such a configuration, since the shaft B is held by the receiving piece 14 and movement in the direction away from the operation piece 18a is regulated, the shaft B does not escape from the discharged retaining ring A. Thus, the retaining ring A can be securely mounted on the shaft B. Further, the shaft B is brought into a correct posture with respect to the retaining ring A by the receiving piece 14, and as a result, the retaining ring A can be mounted smoothly.

Further, the snap ring mounting tool according to the present invention is
In order to position the shaft B in the axial direction, it is possible to adopt a configuration in which the main body 1 is provided with the receiving member 13 that is in contact with the distal end surface of the shaft B so as to be position-adjustable. . According to this configuration, the shaft B is moved in the discharging direction of the retaining ring A.
If the position of the receiving member 13 is adjusted so that the groove C is positioned, the shaft B is inevitably positioned at an appropriate position by contacting the receiving member 13, so This eliminates the need for an operator to perform a positioning operation, thereby improving workability.

According to a fourth aspect of the present invention, there is provided a retaining ring mounting tool according to the fourth aspect, wherein a groove 4 extending in a longitudinal direction is formed in the main body 1.
The holding rod 5 is mounted in the groove 4, and the pusher 6 is slidable in the groove 4, and further, by pushing out the operation piece 18 a, the cutting ring A at the forefront is moved out of the groove 4. In order to enable the discharge, the end portion of the groove 4 can be communicated with the outside. According to such a configuration, the plurality of retaining rings A,.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 3, a snap ring mounting tool according to an embodiment of the present invention is pivotally mounted on a main body 1 and a pivot 3 on the base end side of the main body 1. And a swingable operation unit 2, which is a manual mounting tool that allows a worker to grip the main body 1 and the operation unit 2 to mount the retaining ring A housed in the main body 1 on the shaft B. is there.

The main body 1 is a long rod-like body having a substantially rectangular cross section, and a base 1a extending straight from the base end side;
The base 1a is shifted substantially parallel to the base 1a.
And a housing portion 1b that extends straight from the front end to the front end side. A groove 4 is formed in the accommodation portion 1b along the longitudinal direction, and a holding rod 5 is attached to a bottom surface of the groove 4 along the longitudinal direction.

The groove 4 is for accommodating the retaining ring A, and has a width slightly larger than the outer dimension of the retaining ring A, and is a groove having a rectangular shape in a sectional view with an open top. On the other hand, the holding rod 5 is for extrapolating the retaining ring A, and is formed by notching a part of a round bar having a diameter slightly smaller than the inner dimension of the retaining ring A along the axial direction. It is mounted with its surface in contact with the bottom surface of the groove 4. Thus, the plurality of retaining rings A,... Are accommodated in the same orientation with the notches facing the bottom surface of the groove 4.

A pusher 6 is slidably inserted into the groove 4, specifically, slide grooves 7 are formed on both side walls of the groove 4 along the longitudinal direction of the groove 4. A protrusion 6a protruding from the side wall of the substantially U-shaped presser 6 along the longitudinal direction.
Is fitted in the slide groove 7, whereby the pusher 6 is slidably inserted therein. The pusher 6 is formed to be longer than the housing portion 1b of the main body 1 and has a shape protruding from the base end of the housing portion 1b, and has a shape in which the base end is bent in a substantially L-shape.

On the outer surface of the housing portion 1b of the main body 1,
An accommodating groove 9 for accommodating a coil spring 8 as an elastic body is formed along the longitudinal direction of the accommodating portion 1b, and one end of the coil spring 8 is engaged with the main body 1 and the other end is engaged with the pusher 6, respectively. Thus, the pusher 6 is urged toward the distal end of the housing portion 1b. As a result, the plurality of retaining rings A,
Are biased toward the distal end and are aligned.

A single thin plate 1 is provided on the tip end surface of the main body 1.
0 is attached, and the plurality of retaining rings A,... The inner surface of the thin plate 10 constitutes a stop surface for the retaining ring A.
Is provided such that the inner surface thereof has a predetermined distance from the distal end surface of the holding rod 5, specifically, a distance corresponding to the thickness of one retaining ring A. Accordingly, of the plurality of retaining rings A,... In the press-urged storage portion 1b, the retaining rod 5 is not inserted into the leading-edge retaining ring A.

The lower edge of the thin plate 10 is slightly higher than the bottom surface of the groove 4, so that the notch of the retaining ring A is visible as shown in FIG. It is possible to know the fact that the retaining rings A,... Are accommodated in the accommodating portion 1b.

A circular hole 11 is formed at the tip of the main body 1 at a position lower than the bottom surface of the groove 4 (position separated from the holding rod 5) along the longitudinal direction of the main body 1. A coaxial female screw 12 is further formed from the bottom surface of the circular hole 11 along the longitudinal direction of the main body 1, and a bolt 13 as a receiving member is screwed into the female screw 12. This circular hole 11 is
Is a portion into which the tip of the shaft B is inserted. When the shaft B comes into contact with the head of the bolt 13, the movement of the shaft B in the axial direction is restricted.

Further, a part of the circular hole 11, specifically, a lower edge portion protrudes toward the front end. The protruding piece 14 extends to the inner surface (restriction surface) of the thin plate 10 or to the outside thereof, and the shaft B inserted into the circular hole 11 comes into contact with the protruding piece 14 as a receiving piece, so that the shaft The movement of B in the radial direction is restricted.

On the other hand, the operating portion 2 is also a long rod-like body having a substantially rectangular cross section and a width smaller than the groove 4 of the main body portion 1 and extends straight from the base end to the tip end. ing. A fixture 16 to which a coil spring 15 as an elastic body is attached is attached to a substantially central portion. When the operation section 2 is swung toward the main body 1, the tip of the coil spring 15 is placed on the upper surface of the main body 1. The contact portion urges the repulsive force to return the operation portion 2 to the original position.

A projection 17 is provided on the side wall at the tip end of the operation unit 2. The projection 17 comes into contact with the upper surface of the main body 1 so that the operation unit 2 moves toward the main body 1. Swing is restricted to a certain range. Further, a piece of the operating member 18 having a spring property bent in a substantially L-shape is fixed to the lower surface of the distal end of the operating section 2, and the other piece 18 a as the operating piece is used to swing the operating section 2. Accompanying body 1
Into and out of the groove 4. The operation piece 18a
Is curved in a substantially arc shape with the pivot 3 as the center, and its tip is in sliding contact with the inner surface of the thin plate 10.

Further, the operation piece 18a is formed to have a thickness equal to or slightly smaller than the thickness of one retaining ring A. The holding recess 18b is formed. Thus, when the swinging portion 2 is pushed in, the operation piece 18a enters the groove 4 and the holding concave portion 18b at the tip contacts the upper edge of the retaining ring A at the foremost end. Is pushed further, the cutting-edge retaining ring A is inserted from the groove 4 into the circular hole 11.
It will be discharged toward.

Therefore, according to the retaining ring mounting tool having the above configuration, the screw 13 is adjusted so that the groove C of the shaft B is opposed to the notch of the retaining ring A at the foremost end. When the shaft B is inserted into the hole 11 and the swinging part 2 is pushed in, the cutting ring A at the forefront is ejected and pushed down by the operation piece 18a, so that it is fitted into the groove C of the shaft B. .

At this time, since the shaft B is held by the projecting piece 14, the shaft B does not escape from the discharged retaining ring A, and the retaining ring A can be securely mounted on the shaft B. it can. Further, since the inside of the protruding piece 14 is an arc surface substantially similar to a part of the outer peripheral surface of the shaft B, the shaft B is set along the longitudinal direction of the main body 1, and The shaft B does not become oblique, and the retaining ring A can be securely mounted on the shaft B with a minimum necessary force. further,
In the mounting operation, the axis B is used for the second and subsequent retaining rings A,.
Because there is no contact, there is no fear that these retaining rings A are damaged.

Further, since the shaft B is inevitably positioned at an appropriate position by the bolt 13,
It is not necessary for the operator to check whether the position of the groove C of the shaft B and the state of the snap ring A are the same at every mounting operation. Thereby, when the mounting operation is performed in a state where the shaft B is incorporated in the device or the like, extremely good workability is obtained.

As described above, the retaining ring mounting tool according to the above-described embodiment has various conveniences unlike the conventional retaining ring mounting tool, but the retaining ring mounting tool according to the present invention includes: The present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention.

For example, regardless of the structure in which the thin plate 10 is fixed to the main body 1, the main body 1 may be formed so as to have a restricting surface, or the inner surface may be restricted on the distal end side of the main body 1. The cover serving as the surface may be detachably attached.

The bolt 13 as a receiving member is not indispensable, and a circular hole (a hole of another shape) may be formed as a through hole or a sufficiently long stop hole, and the operator may attach the shaft B to the hole. To adjust the position as appropriate. In this case, the lower surface of the hole (the surface on the side separated from the holding rod 5) is the inner surface of the receiving piece in the present invention.

Further, it is not essential to insert the shaft B into the hole from the axial direction. A notch communicating with the hole is formed in the main body 1 along the longitudinal direction of the hole, and the shaft B is inserted through the notch. You may make it insert in a hole from a radial direction.

It is not essential that the main body 1 is provided with the groove 4 and that the groove 4 is used as a space for accommodating the retaining rings A,..., And the holding rod 5 may be exposed to the outside. However, a retaining rod 5 is mounted on a predetermined surface of the main body 1 or a flat plate is provided on the main body 1 so that the retaining ring A does not rotate inadvertently and the direction is not uniform. It is necessary to attach the holding rod 5 to the edge of this plate portion.

Further, the tip of the operation piece 18a is
It is recessed in an arc shape to increase the retention of
For this purpose, the holding recess may be V-shaped or substantially U-shaped.

Further, in the above embodiment, the mode as a manual tool has been described.
May be mechanically performed by, for example, a cylinder or a crank instead of manually.

In addition, the size, shape, arrangement, and the like of each component can be appropriately changed without departing from the gist of the present invention.

[0037]

As described above, the retaining ring mounting tool according to the present invention discharges the retaining rings A one by one from the storage section and mounts them on the shaft by the operation thereof. It is possible to easily and securely mount the retaining ring with a simple configuration without damaging the contained retaining ring.

[Brief description of the drawings]

FIG. 1 shows a side view of a snap ring mounting tool according to an embodiment of the present invention.

FIG. 2 is a side view, partly in section, of the retaining ring mounting tool of the embodiment.

3A is a cross-sectional view taken along the line AA in FIG. 1, and FIG.
FIG. 2 shows a view on arrow B of FIG. 1.

FIG. 4 shows a side view and a main part enlarged sectional side view of a conventional retaining ring mounting tool.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body part, 2 ... Operation part, 4 ... Groove, 5 ... Holding rod, 6 ... Presser, 10 ... Thin plate (stop surface), 13 ... Bolt (receiving member),
14 Projecting piece (receiving piece), 18a Operating piece, 18b Holding recess

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F16B 21/18 F16B 21/18 F

Claims (4)

[Claims] 1. A body (1) comprising: a main body (1); and an operating part (2) pivotally attached to a base end side of the main body (1) and capable of swinging. A retaining rod (5) that can be externally inserted by aligning the retaining rings (A,...), And a plurality of retaining rings (A,. And a plurality of pressurized retaining rings (6) having a distance corresponding to the thickness of one retaining ring (A) and one end of the retaining rod (5). A,...)
0) is provided, and the operating portion (2) moves forward and backward between the distal end surface of the holding rod (5) and the stopping surface (10) with the swinging operation of the operating portion (2). A retaining ring mounting tool comprising an operation piece (18a). 2. The shaft (B) when the retaining ring (A) is mounted.
Receiving member (14) opposed to the operation piece (18a) in the main body (1) with the distal end surface of the holding rod (5) and the stopping surface (10) interposed therebetween in order to restrict the radial movement of the holding member (1). The retaining ring mounting tool according to claim 1, further comprising: 3. In order to position the shaft (B) in the axial direction,
The retaining ring mounting tool according to claim 1 or 2, wherein the main body (1) is provided with a receiving member (13) that is in contact with the distal end surface of the shaft (B) so as to be position-adjustable. 4. A groove (4) is formed in the main body (1) along the longitudinal direction. A holding rod (5) is mounted in the groove (4), and a pusher (6) is formed in the groove. (4) The tip of the groove (4) is slidable so that the cutting ring (A) can be ejected out of the groove (4) by pushing out the operation piece (18a). The retaining ring mounting tool according to any one of claims 1 to 3, wherein the tool and the outside communicate with each other.