JP2530726Y2 - Circlip fitting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to a circlip fitting for fitting a circlip into a ring-shaped groove formed on an inner peripheral surface of a round hole provided in a work. It concerns the device.

2. Description of the Related Art For example, when a circlip for preventing a piston pin from coming off is inserted into a piston pin hole formed in a piston of an engine, a worker manually works or FIG. A circlip fitting device as shown in FIG.

This fitting device has a configuration in which a guide sleeve G faces an opening of a piston pin hole Pa formed in a piston P, and a taper guide T is installed on an upper side of the guide sleeve G. In the guide T, a circlip feed passage Tr including a tapered path Tt and a straight path Ts is formed.

The circlip C is inserted into the tapered path Tt with the crack Cw facing forward, is pushed into the straight path Ts by the push rod B, and is compressed and shrunk so that the crack Cw is closed. Sent to.

The circlip C is pushed down by the insertion rod S, and is sent from the inside of the guide sleeve G into the piston pin hole Pa of the piston P with the crack Cw closed.

When the circlip C reaches the ring-shaped groove Pm formed in the piston pin hole Pa, the circlip C opens and expands the crack Cw by its own elastic restoring force, and fits into the ring-shaped groove Pm. Get stuck.

[Problem to be Solved by the Invention] In the circlip fitting device having the above-described configuration, after the circlip C is fitted into the taper guide T, the push bar B must be operated, and the insertion bar S must be further operated. ,
Work procedures are extremely complicated.

Further, since the circlip C is slid over the inside of the taper guide T and the guide sleeve G over a long distance, wear and scratches are often generated. In some cases, the circlip was caught inside and clogged, making it impossible to insert the circlip.

The present invention has been made in view of the above circumstances, and has as its object to provide a circlip insertion device that can easily and reliably perform an operation of inserting a circlip into a work.

[Means for Solving the Problems] Therefore, the circlip fitting device according to the present invention has a contact surface that comes into contact with the surface of the work, and this contact surface comes into contact with the surface of the work while forming a round hole. The apparatus main body is provided so as to face the opening. The apparatus main body further includes a pair of operation levers provided to be swingable with respect to the apparatus main body. And a retaining groove that is inclined with respect to the axis of the apparatus main body and conforms to the outer peripheral shape of the circlip, and the respective claw portions are closed in a direction to close each other by a coil spring interposed between the pair of operation levers and the apparatus main body. A circlip holding means is provided for urging the circlip and pressing the circlip in a state of being inclined with respect to the axis of the round hole while pressing and reducing the diameter of the circlip on the holding surfaces of the claw portions of the pair of operation levers.

Further, in the circlip fitting device according to the present invention, a guide slope that is parallel to the holding groove of the circlip holding means and abuts one peripheral portion of the circlip held by the circlip holding means, A tip having an outer peripheral surface that follows the inner peripheral surface of the round hole and abuts the inner peripheral surface, and is provided on the apparatus main body in such a manner that the distal end protrudes from the abutting surface; A pilot member is provided for supporting one circumferential portion of the circlip in a state inserted into the hole so as to face one of the ring-shaped grooves in the round hole, and is further provided movably along the axial direction of the device main body. A press-fitting member is provided for pressing the other peripheral portion of the circlip held by the circlip holding means toward the inner side of the round hole and shifting the other peripheral portion of the circlip to a position facing the other portion of the ring-shaped groove. By Rukoto, it has achieved the above object.

[Operation] According to the above configuration, the circlip held by the circlip holding means is pushed into the round hole of the work by the press-fitting member, whereby the circlip can be fitted into the ring-shaped groove.

During the fitting operation, the circlip is guided by the inner peripheral surface of the round hole and slides from the opening of the round hole to the ring-shaped groove.

Hereinafter, the present invention will be described in detail with reference to the drawings showing one embodiment.

1 to 6 show a circlip fitting device according to the present invention.
Has a cylindrical sleeve 2 as an apparatus main body, and a pilot member 3 fixed to the sleeve 2.

As shown in FIG. 4, the pilot member 3 extends in the axial direction so as to occupy a substantially half area inside the sleeve 2, and is fixed to the sleeve 2 by set screws 4,4.

The pilot member 3 is composed of a distal end 3F, a main body 3H, and a spring housing 3B.
Has a semi-cylindrical shape, a stopper step 3s is formed on the lower surface, a spring receiving step 3b is formed on the upper surface, and the spring accommodating portion 3B is formed in a semi-cylindrical shape. ing.

Further, as is apparent from FIGS.
Protrudes from the lower surface (contact surface) of the sleeve 2 and has a guide slope 3f formed at the tip thereof.

The sleeve 2 is provided with a press-fit member 5.
The press-fitting member 5 includes a pressing portion 5A housed inside the sleeve 2 slidably along the axial direction, and a handle portion 5E formed at the upper end of the pressing portion 5A.

A spring receiving step 5b is formed at an intermediate portion of the pressing portion 5A, and a portion below the spring receiving step 5b is formed in a semi-cylindrical shape, and cooperates with a spring receiving portion 3B of the pilot member 3. And accommodates the coil spring 6.

A stopper step 5s is formed at the lower end of the pressing portion 5A. The stopper step 5s comes into contact with the stopper step 3s of the main body 3H of the pilot member 3 so that the coil spring is formed. The upward movement of the press-fitting member 5 due to the urging force 6 is restricted.

On the other hand, as clearly shown in FIG. 1, the sleeve 2 is provided with circlip holding means 7.

The circlip holding means 7 is composed of a pair of operation levers 8, 8 each of which is pivotally supported so as to sandwich the sleeve 2, and coil springs 9, 9 for urging the operation levers 8.

The operating lever 8 is provided with a claw 8H located below the support shaft.
And a gripping portion 8N located above the support shaft. Opposing surfaces (clipping surfaces) of the claws 8H include:
As shown in FIG. 5 (a), a holding groove 8m which is inclined with respect to the axis of the sleeve 2 and which follows the outer peripheral shape of the circlip is formed. As shown in FIG. 5 (b), the holding groove 8m is formed by cutting off the lower edge diagonally.

On the other hand, the coil spring 9 is interposed between a spring receiving concave portion 2a formed on the sleeve 2 and a spring receiving concave portion 8a formed on the operation lever 8, and a grip portion 8N of the operation lever 8 is provided.
Is urged outward, in other words, in a direction in which the opposing claw portions 8H, 8H are brought closer to each other (closed direction).

In order to perform the work of inserting the circlip using the device 1, first, the gripping portion 8N of the pair of operation levers 8, 8 is used.
Are tightened against the elastic force of the coil spring 9, respectively.
The claw portions 8H, 8H opposed to each other are thereby separated from each other.

Next, the circlip C is attached to the guide slope 3f of the distal end portion 3F of the pilot member 3, and the slit Cw is positioned on the guide slope 3f.
The claw portions 8H, 8H in FIG.

Thereafter, when the operator releases the hand from the pair of operation levers 8, 8, the opposing claw portions 8H, 8H move close to each other due to the elastic return force of the coil spring 9, and the circlip C
Is fitted into the holding groove 8m, and is compressed by the pair of claw portions 8H, and is sandwiched between the claw portions 8H, 8H with the slit Cw closed.

Next, the distal end portion 3F of the pilot member 3 is inserted into the piston pin hole Pa in such a manner that its outer peripheral surface is in contact with the inner peripheral surface of the piston pin hole Pa, and the lower surface (contact surface) of the sleeve 2 is To the outer peripheral surface of

Here, the outer peripheral surface of the front end 3F is
By contacting the inner peripheral surface of the piston pin hole,
The Pa and the circlip C are aligned (centered).

By inserting the distal end 3F of the pilot member 3 into the piston pin hole Pa, as shown in FIG. 6 (a), the circlip C contacting the guide slope 3f of the distal end 3F.
Of the ring groove Pm is occupied at a position facing one part (the left part in the figure) of the ring-shaped groove Pm.

Next, the handle portion 5E of the pressing member 5 is operated to lower the pressing portion 5A against the elastic force of the coil spring 6, thereby positioning the circlip C on the other peripheral portion, that is, the upper side in the figure. The part is pressed on the lower surface of the pressing part 5A,
As a result, one circumferential portion of the circlip C is displaced and moved along the guide slope 3f of the distal end portion 3F, and fits into one portion of the ring-shaped groove Pm.

Thereafter, when the pressing portion 5A is further lowered, as shown in FIG. 6 (b), the circlip C is inserted into the piston pin hole Pa.
While being guided by the inner peripheral surface of the
When the circlip C reaches the other portion (right portion in the figure) of Pm, the circlip C opens and expands the slit Cw by its own elastic restoring force, and fits into the ring-shaped groove Pm.

When the handle 5E is opened after the work of inserting the circlip C is completed, the pressing member 5 moves upward by the elastic restoring force of the coil spring 6, returns to the normal state, and prepares for the next work of fitting.

It should be noted that the circlip fitting device according to the present invention is not only used for fitting a circlip into a piston pin hole, but can be widely used for fitting a circlip into a round hole in various works. Of course.

Further, in the present embodiment, an example is described in which the circlip insertion device is configured as a pure hand tool, which is operated manually by an operator, but the circlip insertion device according to the present invention includes an operation lever and It goes without saying that an automatic assembling machine can be configured by combining an actuator for operating the operation handle, an automatic circlip supply device, and the like.

[Effects of the Invention] As described in detail above, the circlip fitting device according to the present invention has a contact surface that comes into contact with the surface of the work, and the contact surface comes into contact with the surface of the work while being rounded. The apparatus main body is provided so as to face the opening of the hole, and further includes a pair of operation levers provided to be swingable with respect to the apparatus main body. The holding surface is provided with a holding groove that is inclined with respect to the axis of the device main body and conforms to the outer peripheral shape of the circlip,
A coil spring interposed between the pair of operation levers and the apparatus main body urges the respective claws in a direction to close each other, and presses the circlip on the clamping surfaces of the claws of the pair of operation levers to reduce the diameter. A circlip holding means is provided for holding the circlip while being inclined with respect to the axis of the round hole.

Further, in the circlip fitting device according to the present invention, a guide slope that is parallel to the holding groove of the circlip holding means and abuts one peripheral portion of the circlip held by the circlip holding means, A tip having an outer peripheral surface that follows the inner peripheral surface of the round hole and abuts the inner peripheral surface, and is provided on the apparatus main body in such a manner that the distal end protrudes from the abutting surface; A pilot member is provided for supporting one peripheral portion of the circlip in a state inserted into the hole so as to face one side of the ring-shaped groove in the round hole, and is further provided movably along the axial direction of the apparatus body. A press-fitting member that presses the other peripheral portion of the circlip held by the circlip holding means toward the inner side of the round hole and shifts the other peripheral portion of the circlip to a position facing the other portion of the ring-shaped groove. It is provided.

According to the above configuration, the circlip held by the holding means can be fitted into the ring-shaped groove only by pushing the circlip into the round hole of the work by the press-fitting member. Since it is guided on the inner peripheral surface of the hole and slides only a short distance from the opening of the round hole to the ring-shaped groove, the occurrence of wear, damage, and clogging is extremely small.

As a result, the work of inserting the circlip into the work
This can be performed easily and reliably.

[Brief description of the drawings]

FIG. 1 is an overall front view of a main part of the circlip fitting device according to the present invention, which is cut away, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. Overall side view of the
Fig. 4 is an overall side view showing a main part in a cutaway view, and Fig. 5 (a).
6 (a) and 6 (b) are a perspective view and a longitudinal sectional view of a main part of a circlip holding means, and FIGS. 6 (a) and 6 (b) are side cross-sectional views of an essential part showing an operation mode of the device when fitting the circlip. FIG. 7 is a conceptual diagram of a conventional circlip fitting device. DESCRIPTION OF SYMBOLS 1 ... Circlip fitting device, 2 ... Sleeve (device main body), 3 ... Pilot member, 3F ... Tip, 3f ... Guide slope, 5 ... Press-fit member, 5A ... Pressing portion, 5E ... ... Handle part, 7... Circlip clamping means, 8... Operating lever, 8H... Claw part, 8N... Gripping part, 8 m.
Coil spring.

Claims (1)

(57) [Scope of request for utility model registration] 1. A circlip fitting device for fitting a circlip into a ring-shaped groove formed in an inner peripheral surface of a round hole provided in a work, wherein the circlip fitting device contacts a surface of the work. An apparatus main body having a contact surface and installed in such a manner as to face the opening of the round hole while bringing the corresponding contact surface into contact with the surface of the work; and a pair of rockers provided swingably with respect to the device main body. An operating lever, and a holding groove that is inclined with respect to the axis of the apparatus main body and conforms to the outer shape of a circlip, is provided on a holding surface of a claw portion facing the surface of the work in the pair of operating levers, A coil spring interposed between the pair of operation levers and the device main body urges each of the claws in a direction to close each other, and presses a circlip on the clamping surfaces of the claws of the pair of operation levers. While reducing the diameter A circlip holding means for holding the circlip in a state of being inclined with respect to the axis of the round hole; and one peripheral portion of the circlip held parallel to the holding groove of the circlip holding means and held by the circlip holding means. A tip having a guide inclined surface to be in contact with, and an outer peripheral surface following the inner peripheral surface of the round hole in the work and abutting on the inner peripheral surface, wherein the distal end protrudes from the contact surface. A pilot member provided on the apparatus main body and supporting one peripheral portion of the circlip so as to face one side of a ring-shaped groove in the circular hole when the distal end is inserted into the round hole of the work; It is provided movably along the axis direction of the main body,
The other peripheral portion of the circlip held by the circlip holding means is pressed toward the inner side of the round hole to move the other peripheral portion of the circlip to a position facing the other portion of the ring-shaped groove. A circlip fitting device, comprising: a press-fit member;