JPH08309624A - Elastic ring assembling method - Google Patents

Abstract

PURPOSE: To provide an elastic ring assembling method using only a holding member by providing claws, which hold an elastic ring and which can be freely slid in relation to the other claws in the axial direction of the elastic ring. CONSTITUTION: An annular O-ring is deformed in the radial direction by opening and closing claws (first claws) 1a, 1b, and sliding claws (second claws) 2a, 2b are slid so as to bend and deform the O-ring to the V-shape. At the same time, sliding fluid pressure cylinders 9a, 9b are moved backward so as to slide the sliding claws 2a, 2b, and an opening and closing fluid pressure cylinder 7 is moved backward so as to close the opening and the closing claws 1a, 1b until the outer shape of the O-ring is shrunken to a dimension smaller than the hole diameter of a work. In this condition, the O-ring is assembled into an annular groove of the circumferential surface of the hole of the work. The O-ring can be thereby assembled by using the only opening and closing claws 1a, 1b and the sliding claws 2a, 2b as the holding member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic ring assembling method in which an elastic ring such as an O-ring made of rubber or synthetic resin is attached to an annular groove formed on the inner peripheral surface of a hole of a work. It is a thing.

[0002]

2. Description of the Related Art Conventionally, as an elastic ring assembling method, for example, when an elastic ring such as an O-ring made of rubber or synthetic resin is attached to an annular groove formed on the inner peripheral surface of a hole of a work, What is disclosed in Kaihei 5-318238 is known.

As shown in FIG. 8, the apparatus used for carrying out this assembling method comprises a taper guide 21 having a tapered hole through which the elastic ring slides down, and a collar-shaped ring holding member for holding the elastic ring. Portion 22, a plurality of pressing claws 23 that can be opened and closed in the radial direction of the elastic ring, and L-shaped pressing portion 2
It consists of a pushing shaft 24 forming 4a. Ring holder 22
The pressing claw 23 and the pressing shaft 24 are provided in a hollow shaft-shaped holder 25, and the hollow shaft-shaped holder 25 is used for the taper guide 2
It is rotatably provided on an upper support 26 which is vertically movable so that it can be inserted into one tapered hole. The taper guide 21 has its tapered hole positioned coaxially with the axis of the hole of the work 27 and is fixed to the lower support 28 so as to abut the opening of the hole of the work.

A plurality of pressing claws 23 are provided on the outer peripheral surface of the holder 25 at equal intervals on the outer circumference of the holder 25 so as to be openable and closable in the radial direction of the elastic ring via a mounting shaft, and are constantly urged in the opening direction by springs. The pushing shaft 24, which is provided at the lower end of the L-shaped pushing portion 24a, is swingably provided in the holder 25 via the mounting shaft, and the pushing portion 24a at the lower end of the pushing shaft 24 protrudes outward in the radial direction of the elastic ring. It is possible.

The elastic ring 29 held by the ring holding portion 22 at the lower end of the holder 25 comes into contact with the inner peripheral surface of the taper hole of the taper guide 21 as the upper support 26 on which the holder 25 is provided descends, and is tapered. It is placed on the inner peripheral surface of the guide 21 and is held by being held by the pressing claw 23 which further descends. By the pressing claw 23 that gradually closes in the closing direction as the diameter of the tapered hole decreases, the elastic ring 29 reaches the position of the annular groove 30 on the inner peripheral surface of the hole of the work 27 placed coaxially with the tapered hole. Pushed in. In a state where the elastic ring 29 is held at the position of the annular groove 30, the pushing shaft 24 swings and the pushing portion 24a at the lower end projects outward in the elastic ring radial direction, and then the holder 25 is rotated in the axial direction. Push shaft 24
The pushing portion 24a of is rotated. Then, the elastic ring 29
Is pressed by the pressing portion 24a of the rotating pressing shaft 24,
It is pushed into the annular groove 30 of the work 27.

[0006]

However, in the conventional elastic ring assembling method, in addition to a holding member such as a collar ring holding portion for holding the elastic ring, an assembling tool such as a taper guide is indispensable. Therefore, the number of device components increases and the device structure becomes complicated. Therefore, workability and efficiency when assembling the elastic ring are poor.

According to the present invention, the elastic ring is reduced and deformed in the radial direction and is bent in the axial direction, so that the elastic ring is assembled in the annular groove of the inner peripheral surface of the hole of the work in a reduced state. An object of the present invention is to assemble an elastic ring only by relative movement of two types of holding members that hold and deform the elastic ring.

[0008]

According to a first aspect of the present invention, there is provided an elastic ring assembling method for assembling an elastic ring in an annular groove of an inner peripheral surface of a hole of a work, wherein the elastic ring is held. At least two first pawls that are openable and closable in the radial direction of the elastic ring, and at least two second pawls that are slidable relative to the first pawl in the axial direction of the elastic ring that holds the elastic ring. The elastic ring to be assembled in the inner peripheral annular groove in a state where the outer shape of the elastic ring is reduced from the hole diameter of the workpiece by opening and closing the first claw and sliding the second claw in synchronization with each other. Assemble method.

Further, as a means for achieving the above object, in claim 2, in the elastic ring assembling method of assembling the elastic ring into the annular groove of the inner peripheral surface of the hole of the work, the elastic ring is held to hold the elastic ring. At least two first claws that are expandable and contractible based on the diameter and that are concentric with the diameter of the elastic ring and that are held on the elastic ring and slide in the axial direction of the elastic ring At least two second claws which are free and smaller than the diameter of the elastic ring and which are arranged on a concentric circle and which can be inserted into the holes are used. After the elastic ring is held by the first claw, the first claw is used. The elastic ring is held by the second pawl at the location where the pawl is opened and the diameter of the elastic ring is reduced, and the elastic ring is bent by sliding the second pawl while closing the first pawl. Make it smaller than the hole diameter of the work In this state, the elastic ring is inserted into the inner circumferential surface annular groove, and after the insertion, the first claw is opened and the second claw is slid to restore the bending of the elastic ring to restore the elastic ring to the inner circumferential surface annular groove. An elastic ring assembling method of assembling into the groove may be used.

[0010]

In the elastic ring assembling method according to claim 1, which has the above-mentioned structure, the elastic ring whose free shape is an annular state is radially deformed by the first claw and is axially bent by the second claw. As a result, the elastic ring can be assembled in the annular groove of the inner peripheral surface of the hole of the work in a reduced state, so that the elastic ring can be assembled only by the holding member.

Further, in the method of assembling the elastic ring according to claim 2 having the above-mentioned structure, the elastic ring whose free shape is an annular state is held by the first pawl whose diameter can be freely expanded and contracted, and then the first pawl is attached. The elastic ring is held by the second claw that is slidable in the axial direction while reducing the diameter of the open elastic ring. By bending the elastic ring by sliding the second claw while closing the first claw, the outer peripheral shape of the elastic ring is made smaller than the hole diameter of the work, and the inner peripheral surface annular groove of the hole of the work is reduced. Insert up to. After inserting the elastic ring, slide the second claw while opening the first claw to restore the bending of the elastic ring and to restore the elastic ring to the free shape, and assemble it to the inner circumferential annular groove. Therefore, the elastic ring can be assembled only by the holding member.

[0012]

EXAMPLES Next, examples of the present invention will be described below. Embodiment 1 FIGS. 1, 2, and 3 illustrate an outline of an elastic ring assembling device used for carrying out the present invention. As shown in FIG. 3, the two opening / closing claws 1a and 1b, which are the first claws, can be opened and closed vertically in the plane of the drawing, and the two sliding claws 2a and 2b, which are the second claws. Are provided in the apparatus main body 3 such that the opening and closing claws 1a and 1b and the sliding claws 2a and 2b are arranged in the circumferentially equidistant portions so as to be slidable in the direction perpendicular to the plane of the drawing.

As shown in FIG. 1, the opening / closing claws 1a, 1b are rotatably supported with respect to the apparatus main body 3 via pins 4a, 4b. The projections 5a, 5b projecting in the direction are provided in a hole penetrating the center of the apparatus body 3 and the recess 6 at one end of the shaft 6 is provided.
It is engaged with a and 6b. The other end of the shaft 6 is screwed to the rod end of an opening / closing fluid pressure cylinder 7 fixedly mounted on the apparatus body 3, and the shaft 6 is moved in the left-right direction of the drawing as the rod of the opening / closing fluid pressure cylinder 7 slides. Slide on.
As the shaft 6 slides, the opening / closing claws 1a and 1b rotate vertically in the plane of the drawing.

As shown in FIG. 2, the sliding claws 2a and 2b are provided with a shaft 8 provided in a hole penetrating a side portion of the apparatus main body 3.
It is screwed to one end of a and 8b. Shaft 8a,
At the other end of 8b, the rod tips of sliding fluid pressure cylinders 9a and 9b fixedly mounted on the apparatus body 3 are screwed.
Shafts 8a and 8b are fluid pressure cylinders 9a and 9b for sliding.
It slides in the left-right direction on the paper surface as the rod slides. As the shafts 8a and 8b slide, the sliding claws 2a and 2b slide leftward and rightward on the paper surface. The device body 3 can be moved in the left-right direction on the paper surface of FIG. 2 by a driving device (not shown).

Opening / closing claws 1a, 1b and sliding claws 2a, 2b
Grooves 10 for holding the O-rings are provided at the tips of the respective
a, 10b, 11a, 11b are provided. Opening / closing claws 1a arranged on the circumference of the apparatus body 3 at equal intervals,
1b and the sliding claws 2a, 2b are set so that the grooves 10a, 10b at the tip end face each other in the original position and the grooves 11a, 11b face each other and are positioned on the same circumference. The distance between the two opening / closing claws 1a and 1b facing each other at the original position is substantially the same as the free diameter, which is the inner diameter of the assembled O-ring in the normal state, and the opening / closing claw associated with sliding of the shaft 6 is used. This distance can be increased by rotating 1a and 1b. Also, two sliding claws 2 facing each other
The distance between a and 2b in the original position is smaller than the free diameter of the O-ring, and the sliding claw 2 is kept with this distance maintained.
a and 2b slide.

Next, an elastic ring assembling method for carrying out the present invention will be described. Grooves 10a, 10b, 11 at the tips of the opening / closing claws 1a, 1b and the sliding claws 2a, 2b.
The O-ring 12 is hooked on the grooves 10a and 10b at the tips of the opening and closing claws 1a and 1b in the original position where a and 11b are set on the same circumference. As shown in the upper side of FIG. 1, opening / closing claws 1a,
The opening / closing fluid pressure cylinder 7 for rotating 1b is moved forward (toward the right side of the drawing), and the opening / closing claws 1a and 1b are opened to open the O-ring 1.
Deform 2 into an elliptical shape. Then, as shown in the upper side of FIG. 2, the short diameter side of the O-ring 12 that has been deformed into an elliptical shape has the spacing at the original position set smaller than the free diameter of the O-ring 12, and the tip portions of the sliding claws 2a and 2b. Groove 11
Fit into a and 11b.

Next, as shown in the lower side of FIG. 2, the sliding fluid pressure cylinders 9a and 9b are retracted (to the left in the drawing), and the sliding claws 2a and 2b are slid to bend the O-ring 12. Transform it into a letter shape. Synchronize with this,
That is, while the sliding fluid pressure cylinders 9a and 9b are moved backward (toward the left side of the paper surface) and the sliding claws 2a and 2b are slid, the opening and closing fluid pressure cylinder 7 is moved backwards (to the left side of the paper surface). ) To close the outer shape of the O-ring 12 smaller than the hole diameter of the work, the opening / closing claws 1a and 1b are closed.

In this state, as shown in the lower side of FIG.
O-ring 12 'whose outer peripheral shape is smaller than the hole diameter of the work 13
While holding the device, the apparatus main body 3 is moved in a direction of approaching the work 13, and the opening / closing claws 1a and 1b of the O-ring 12 'are moved.
The portion held by the grooves 10a, 10b at the tip end of is reached to the position of the inner peripheral surface annular groove 13 'of the hole of the work 13.
Next, the sliding fluid pressure cylinder 9 in the state shown in the lower side of FIG.
a and 9b are moved forward (to the right in the drawing), the sliding claws 2a and 2b are returned to their original positions as shown in the upper side of FIG. 5, and the bent O-ring 12 'is returned to its original shape. In synchronism with this, as shown in the upper side of FIG. 4, the opening / closing fluid pressure cylinder 7 is moved forward (to the right in the drawing), the opening / closing pawls 1a and 1b are opened, and the inner diameter of the O-ring is returned to the free diameter of the O-ring. By O
The ring 12 is assembled in the annular groove 13 'on the inner peripheral surface of the hole of the work 13. Next, the opening / closing fluid pressure cylinder 7 is retracted (toward the left side of the drawing), the opening / closing claws 1a and 1b are closed, and the apparatus main body is moved to 9
It is inverted by 0 degree, and at this time, the diameters of the sliding claws 2a and 2b are smaller than the inner diameter of the O-ring 12, so that the sliding claws 2a and 2b can be opened and closed at the positions of the O-rings held in the grooves 11a and 11b at the tips. Grooves 10a, 10b at the tips of the claws 1a, 1b
Align the position of. Again, the opening / closing fluid pressure cylinder 7 is moved forward (to the right in the drawing), the opening / closing pawls 1a and 1b are opened, and O is opened.
The ring is assembled to the annular groove of the inner peripheral surface of the hole of the work, and the assembly of the O-ring to the annular groove is completed.

As described above in detail, in the method of assembling the elastic ring in this embodiment, the O-ring in the annular state is radially deformed by the opening / closing claws 1a, 1b, and axially by the sliding claws 2a, 2b. The O-ring can be assembled into the annular groove on the inner peripheral surface of the hole of the work by refracting the O-ring. Therefore, the O-ring can be assembled only by the holding claw for opening and closing and the sliding claw. it can.

Embodiment 2 FIGS. 6 and 7 schematically show an elastic ring assembling apparatus of Embodiment 2. As is clear from FIG. 7, this second embodiment
In the apparatus main body 53, four opening / closing claws 51, which are first claws, are provided so as to be openable / closable vertically and horizontally on the paper surface, and four sliding claws 52, which are second claws, are provided on the paper surface. It is slidable in the vertical direction. The opening / closing claws 51 and the sliding claws 52 are alternately arranged at evenly distributed portions on the circumference.

As shown in FIG. 6, each of the opening / closing claws 51 is rotatably supported by the respective pins 54 with respect to the apparatus main body 53, like the opening / closing claws 1a and 1b of the first embodiment, and individually. The convex portion 55 is engaged with the concave portion 56a formed on the outer periphery of the end portion of the shaft 56 that penetrates the central portion of the apparatus main body 53. Similar to the first embodiment, the shaft 56 slides in the left-right direction on the paper surface of FIG. 6 by the opening / closing fluid pressure cylinder 57, and the opening / closing claws 51 rotate in the same manner as described above. .

Further, each of the sliding claws 52 is also fastened to one end of each shaft 58 penetrating a side portion of the apparatus main body 53, similarly to the sliding claws 2a and 2b of the first embodiment. Then, each shaft 58 slides in the left-right direction of the paper surface of FIG. 6 together with each sliding claw 52 by each sliding fluid pressure cylinder 59 as in the first embodiment. The apparatus main body 53 of this embodiment is also shown in FIG.
It can be moved to the left and right of the paper.

Grooves 60 and 61 for holding the O-ring 12 are provided at the tip ends of the opening and closing claws 51 and the sliding claws 52, respectively, as in the first embodiment.
When each of the opening / closing claws 51 is in the original position, the radial distance between the two opening / closing claws 51 facing each other is substantially the same as the free diameter which is the inner diameter of the O-ring 12 in the normal state, and Regarding the moving claw 52, the radial distance between the two sliding claws 52 facing each other is set to be smaller than the free diameter of the O-ring 12, and this point also relates to the opening / closing claw 1a of the first embodiment.
1b and sliding claws 2a, 2b.

Next, the method of assembling the elastic ring of the second embodiment will be described. As in the first embodiment, the O-ring 12 is hooked on the groove 60 of each opening / closing claw 51 in the original position state of each opening / closing claw 51 and each sliding claw 52. Here, the shaft 56 is moved forward (to the right in the drawing) by the opening / closing fluid pressure cylinder 57, and the four opening / closing claws 51 are provided in the first embodiment.
1 is opened, the O-ring 12 is deformed into a rectangular shape. Then, the parts corresponding to the respective rectangular sides of the deformed O-ring 12 are arranged such that the two intervals facing each other in the original position are set to be smaller than the free diameter of the O-ring 12 and the four sliding claws 52.
Fit in the groove 61 of the.

Next, as shown in the lower side of FIG. 2 in the first embodiment, the respective sliding fluid pressure cylinders 59 retract the respective shafts 58 together with the respective sliding claws 52 (toward the left side of the drawing), so that O The ring 12 is bent at a portion corresponding to each side of the rectangular shape. In synchronism with this, that is, while moving each sliding claw 52 backward (toward the left side of the paper), the shaft 56 is moved backward (toward the left side of the paper) by the opening / closing fluid pressure cylinder 57 as shown in the lower side of FIG. 1 in the first embodiment. Then, the opening / closing claw 51 is closed until the outer shape of the O-ring 12 becomes smaller than the hole diameter of the work 13.

In this state, the apparatus main body 53 is moved in the direction of approaching the work 13 as in the first embodiment,
The portion of the O-ring 12 held by the groove 60 of each opening / closing claw 51 is made to reach the position of the inner peripheral surface annular groove 13 ′ of the hole of the work 13. Here, each sliding claw 52 is returned to its original position by the operation of each sliding fluid pressure cylinder 59, and the bent O-ring 12 is returned to its original shape. In synchronization with this, each opening / closing claw 51 is connected to the opening / closing fluid pressure cylinder 57.
The O-ring 12 is assembled into the annular groove 13 'of the inner peripheral surface of the hole of the work 13 by opening by the operation of, and the assembly of the elastic ring is completed.

As described above, in the second embodiment, the O-ring 12 is inserted into the hole of the work 13 by being grasped by the total of eight claws 51 for opening and closing and four claws 52 for sliding. , The O-ring 12 gripping force is increased, and the O-ring 12 can be always inserted into the hole of the work 13 in a stable posture.

Further, since the O-ring 12 is bent at the portions corresponding to the sides of the rectangular shape by retracting the four sliding claws 52 as described above, the bending at each portion can be small. When each sliding claw 52 is returned to its original position, the bent O-ring 12 easily returns to its original shape. In addition, since the four opening / closing claws 51 are opened to assemble the O-ring 12 into the inner circumferential surface annular groove 13 ', it is not necessary to invert the device body 53 by 90 degrees as in the first embodiment. That is, in the first embodiment, the opening / closing claws 1a and 1b are attached to the work 13
After closing once in the hole of
After that, the opening and closing claws 1a and 1b are opened again to complete the assembling of the O-ring 12 into the inner circumferential surface annular groove 13 ', but in the second embodiment, these steps are unnecessary.

In Examples 1 and 2, the O-ring 12
In order to assemble the opening O of the work 13 into the annular groove 13 'of the inner peripheral surface of the work 13, the opening / closing claws 1a, 1b (or 51) are opened in synchronization with the return of the bent O-ring 12 to its original shape. After that, the apparatus main body 3 (or 53) is further moved in a direction to approach the work 13 to open / close the claws 1a, 1b (or 5).
The O-ring 12 may be pressed into the inner circumferential surface annular groove 13 'at a portion other than the grooves 10a, 10b (or 60) of 1) to be firmly assembled.

[0030]

According to the elastic ring assembling method of the first aspect, the elastic ring in the annular state is radially deformed by the first claw, and the second elastic ring is formed.
Since the elastic ring can be assembled in the annular groove of the inner peripheral surface of the hole of the workpiece by bending the elastic ring in the axial direction with the claw, the elastic ring can be assembled only by the holding member.

Further, in the method of assembling the elastic ring according to the second aspect of the invention, after the elastic ring whose free shape is an annular state is held by the first claw which can be freely expanded and contracted, the first claw is opened. The elastic ring is held by the second claw that is slidable in the axial direction while reducing the diameter. By bending the elastic ring by sliding the second claw while closing the first claw, the outer peripheral shape of the elastic ring is made smaller than the hole diameter of the work, and the inner peripheral surface annular groove of the hole of the work is reduced. Insert up to. After inserting the elastic ring, slide the second claw while opening the first claw to restore the bending of the elastic ring and to restore the elastic ring to the free shape, and assemble it to the inner circumferential annular groove. Therefore, the elastic ring can be assembled only by the holding member.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along the line AA of FIG. 3 of an elastic ring assembling device according to a first embodiment.

FIG. 2 is a cross-sectional view taken along line BB of FIG. 3 of the elastic ring assembling device according to the first embodiment.

FIG. 3 is a front view of the elastic ring assembling device according to the first embodiment.

FIG. 4 is a cross-sectional view showing an O-ring assembled state by the elastic ring assembling apparatus according to the first embodiment.

FIG. 5 is a cross-sectional view showing an O-ring assembled state by the elastic ring assembling apparatus according to the first embodiment.

FIG. 6 is a cross-sectional view taken along line CC of FIG. 7 showing an elastic ring assembling device according to a second embodiment.

FIG. 7 is a front view of the elastic ring assembling device according to the second embodiment.

FIG. 8 is a cross-sectional view showing a conventional elastic ring assembling device.

[Explanation of symbols]

 1a, 1b, 51 ... Opening / closing claw (first claw) 2a, 2b, 52 ... Sliding claw (second claw) 12 ... O-ring (elastic ring) 13 ... Work 13 '... Work hole inner circumference Face ring groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiro Matsumoto 1-1, Toyota-cho, Kariya city, Aichi Prefecture Toyota Boshoku Co., Ltd.

Claims (2)

[Claims] 1. A method of assembling an elastic ring in an annular groove of an inner peripheral surface of a hole of a work, wherein at least two first claws which hold the elastic ring and can be opened and closed in a radial direction of the elastic ring. And at least two second claws that are slidable with respect to the first claw in the axial direction of the elastic ring that holds the elastic ring, open and close the first claw and synchronize the second claw with each other. The method of assembling an elastic ring, wherein the outer ring of the elastic ring is made smaller than the hole diameter of the work to be assembled to the annular groove of the inner peripheral surface, by sliding the claw of the item. 2. An elastic ring assembling method for assembling an elastic ring in an annular groove of an inner peripheral surface of a hole of a work, wherein the elastic ring is held, and the elastic ring is expandable and contractible based on a diameter of the elastic ring. At least two first claws having the same diameter as the ring and arranged on a concentric circle, and holding the elastic ring, slidable in the axial direction of the elastic ring, and smaller than the diameter of the elastic ring. A location where at least two second claws arranged concentrically and insertable into the holes are used, and after the elastic ring is held by the first claw, the first claw is opened to reduce the diameter of the elastic ring. The elastic ring is held by the second claw, and the second claw is slid to bend the elastic ring while closing the first claw to reduce the elastic ring from the hole diameter of the work. After inserting into the circumferential annular groove, after inserting An elastic ring assembling method in which the elastic ring is assembled into the annular groove of the inner peripheral surface by restoring the bending of the elastic ring by sliding the second pawl while opening the first pawl.