JPS59115135A - Elastic ring installation apparatus - Google Patents

Abstract

PURPOSE:To permit an elastic ring to be certainly fitted onto an installation body by allowing an intermediate point to be pivotally supported onto the second movable body through a link and installing a plurality of supporting hooks for allowing the intermediate pivotal supporting point to be spread and transferred in the radial direction, thus securing a large angular variation of the supporting hooks. CONSTITUTION:A cylinder 2 is formed on a working head 1, and a piston 3 is inserted into the cylinder 2. The first movable body 5 is connected to a joint 4 integrally installed with the piston 3, and the second movable body 6 is supported onto the first movable body 5 so as to be movable in the axial direction. An intermediate point is pivotally supported onto the second movable body 6 through a link 9, and a plurality of supporting hooks 7 for allowing an intermediate pivotal supporting point 8 to be spread and transferred in the radial direction by the advance of the shaft of the second movable body 6 are installed. The piston 3 is operated to an advance edge, and the first movable body 5 is advanced, and then the supporting hook 7 is turned, having the intermediate point 8 as pivotal point, and then a large angular variation is generated on the supporting hook 7, and an elastic ring R can be automatically inserted into the annular concaved groove 23 on an installation body 22.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for assembling an elastic ring around the outer periphery of a cylindrical object.

A device that attaches an elastic ring such as a seal ring to the outer periphery of a cylindrical or cylindrical object has a plurality of ring support claws that are attached to one end of the main body at each vertex of a polygon and open and close in the radial direction. The structure is such that the inner periphery of the elastic ring is supported by the inner periphery of the elastic ring, and the ring is inserted into the outer periphery of the object to be attached in a state where it is expanded and protruded outward, and the ring support claw is compressed to fit the elastic ring into the annular groove of the object to be attached. is known from Japanese Patent Publication No. 56-34418.

In such a device, in order to reliably remove the elastic ring from the support claw and fit it into the annular groove, the pivot point of the support claw must be located close to the tip of the support claw, and the angle of the claw relative to the amount of claw closure must be adjusted. It is desirable to increase the amount of change. However, when the pivot point of the support claws is brought closer to the tip, there is a problem that the opening amount of the support claws becomes large (unable to be widened), and the elastic ring cannot be inserted unless the number of support claws is increased.

In the present invention, the amount of opening of the supporting claws can be increased with a small number of supporting claws, and when the elastic ring is removed from the supporting claws, the ratio of the angle change of the supporting claws to the amount of closing of the claws is increased.
To provide a device that can securely attach an elastic ring.

Embodiments of the present invention will be described below with reference to the drawings.

The structure of the apparatus of the present invention will be explained with reference to FIG. 1. Reference numeral 1 denotes a working head, which is attached to the tip of a robot arm, for example. A cylinder 2 is formed in this working head 1,
A piston 3 is fitted into this. A first movable body 5 is attached to a joint 4 provided integrally with this piston 3.
are connected. Further, a second movable body 6 is supported by the first movable body 5 so as to be movable in the same axial direction. 2
1 is a spring that always pushes the second movable body 6 in the forward direction.

An intermediate point is pivotally supported on the second movable body 6 via a link 9, and the intermediate pivot point 8 is pivoted by the forward axial movement of the second movable body 6.
A plurality of support claws 7 are provided which extend and move in the radial direction.

Further, the first movable body 5 and the base end 10 of the support claw 7 are pivotally connected by a link 11, and a link 13 whose base end is pivotally connected to the work head 1 and whose distal end 14 is movable in the radial direction is provided. The tip 14 and the base end 10 of the support claw 70 are pivotally connected by a link 12, and the tip 14 of the link 13 and the first movable body 5
are pivotally connected by a link 15, and the base end portion 10 of the support claw 70 is expanded in the radial direction and linearly moved by the forward and backward movement of the first movable body 5.

In FIG. 1, 16 is an elastic ring supply device. Its structure includes an engagement convex portion 19 at the tip of which the tip of the second movable body 6 comes into contact, and a notch portion around which the support claw 7 is inserted, and a large number of elastic rings R on the outer peripheral surface. It consists of a support shaft 17 that is fitted, and a push-up cylinder 18 that is an elastic ring that is slidably fitted onto the support shaft 17.

The operation from this elastic ring supplying device 16 to assembling the elastic ring R into the annular groove n of the attached body n shown in FIG. 5 by the apparatus of the present invention will be explained.

1 to 3 show the operation until the support claw 7 receives the elastic ring R from the elastic ring supply device 16. In FIG. 1, the elastic ring R is received (the working head 1 has moved forward, and in this state, the piston 3
is located at the forward end, the first movable body 5 is at the forward end position, and the second movable body 6 is also at the forward end position by the spring 21. Due to this forward end position of the second movable body 6, the intermediate pivot point 8 of the support claw 7 is expanded in the radial direction.

The distal end 6α of the second movable body 6 comes into contact with the engagement convex portion 19 of the elastic ring supply device 16, and at the forward movement end of the work head 1, the second movable body 6 contacts the engagement convex portion 19 as shown in FIG. The forward movement of the first movable body 5 is regulated, and the first movable body 5 moves relatively forward, and the support claw 7 is also advanced. 9 pulls the intermediate pivot point 8 radially inward, retracts and closes the support claw 7, and places the tip of the support claw 7 on the inner periphery of the elastic ring located at the top of the support shaft 17 of the elastic ring supply device 16. or inserted. In this state, as shown in FIG. 3, the piston 3 is operated backward to move the first movable body 5 to the backward end. Due to this backward movement of the first movable body 5, the link 15 is moved to the link 13.
The link 11 expands the tip 14 of the support claw 70 in the radial direction, and the link 11 contracts and closes the base end 10 of the support claw 70 in the radial direction, causing the tip of the support claw 7 to expand slightly, and the support claw 7 supports the elastic ring R. It is expanded and supported so that it can be extracted from the shaft 17.

After the support claw 7 receives the elastic ring R in this way, when the work head 1 is moved backward, the second
The movable body 6 moves to the forward end due to the elastic force of the spring 210, and the link 9 pushes the intermediate pivot point 8 outward in the radial direction, widens the elastic ring received at the tip of the support claw 7, and moves naturally. Do not fall off (make sure to support the fifth
As shown in the figure, it corresponds to the object to be attached η.

The second movable body 6α comes into contact with the end face of the work head 4, and the diameter of the elastic rig R is expanded by retracting and retracting the support claw 7 as shown in FIG. is reduced on the outer peripheral surface of the attached object 4.

Next, as shown in FIG. 7, the piston 3 is operated to the forward end to move the first movable body 5 forward. As a result, the base end portion 10 of the support claw 70 is moved radially outward in the same manner as in FIG. 2, and the support claw 7 is rotated about the intermediate point 8. Therefore, the support claw 7 undergoes a large angular change with respect to the closing amount of the tip of the support claw 7, and the elastic ring R supported by the support claw 7 is reliably separated and automatically inserted into the annular groove n of the attached object 4. It is inserted into.

As described above, according to the device of the present invention, when the elastic ring is loosely fitted to the object to be attached, the support claws can be opened widely (because the elastic ring can be split into pieces with fewer support claws, and the elastic When removing the ring from the support claw, the support claw rotates about the intermediate pivot point, which allows for large angle changes in the support claw, and ensures that the elastic ring is inserted into the annular groove of the object to be attached. In the above embodiment, the forward and backward movements of the second movable body utilize the movement of the work head, so there is an advantage that no special drive source is required. It may be moved by another drive source provided on the head side.

[Brief explanation of drawings]

The drawings show a cross section of the main part of the device of the present invention, and FIG. 1, FIG. 5, FIG. 2, and FIG. 3 show the state up to receiving the elastic ring from the elastic ring supply device, and FIGS. and FIG. 7 shows the state until the elastic ring is assembled to the object to be attached. FIG. 8 is a sectional view taken along the line A--A in FIG. 5. DESCRIPTION OF SYMBOLS 1... Working head, 2. OS cylinder, 3... Piston, 5... First movable body, 6... Second movable body, 7.
...Support claw, 8...Intermediate pivot point, 9...Link,
10... Proximal end, 11.12.13.15. Fist/Link.

Claims (1)

[Claims] A first movable body supported so as to be axially movable with respect to the work head by a drive device, and a second movable body supported so as to be axially movable in the same axial direction relative to the first movable body, a plurality of support claws whose intermediate points are pivotally supported on the movable body via links, and whose intermediate points are expanded and moved in the radial direction by the forward axial movement of the second movable body; A plurality of links are provided which connect the first movable body and the work head, and expand and linearly move the base end portions of the support claws in the radial direction by the forward and backward axial movement of the first movable body. Elastic ring assembly device.