JPH028851B2 - - Google Patents

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.

As a device for attaching an elastic ring such as a seal ring to the outer periphery of a cylindrical or cylindrical object,
The inner periphery of the elastic ring is supported by a plurality of ring supporting claws that are attached to one end of the main body at each vertex position of a polygon and open and close in the radial direction, and the elastic ring is inserted into the outer periphery of the object to be attached while being pushed outward. Japanese Patent Publication No. 56-34418 discloses a structure in which a ring support claw is compressed and an elastic ring is fitted into an annular groove of an attached body.

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, if the pivot point of the support claws is brought closer to the tip, the opening amount of the support claws cannot be large, and there is a problem that the elastic ring cannot be inserted unless the number of support claws is increased.

According to 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, and the elastic ring is This provides a device that can be reliably worn.

Embodiments of the present invention will be described below with reference to the drawings.
The configuration of the device of the present invention will be explained with reference to FIG. 1.
is a working head, which is attached, for example, to the tip of a robot arm. A cylinder 2 is formed in the working head 1, and a piston 3 is fitted into the cylinder 2. A first movable body 5 is connected to a joint 4 provided integrally with the piston 3. Further, a second movable body 6 is supported by the first movable body 5 so as to be movable in the same axial direction. 21
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 coupling link 9, and the intermediate pivot point 8 is expanded and moved in the radial direction by the forward axial movement of the second movable body 6. 7 is provided.

Further, the first movable body 5 and the base end portion 1 of the support claw 7
0 by a second movable link 11, and a swing link 13 whose distal end 14, whose proximal end is pivotally connected to the working head 1, is movable in the radial direction.
4 is pivotally connected to the base end 10 of the support claw 7 by an intermediate link 12, and the tip 14 of the swing link 13 and the first movable body 5 are pivotally connected by the first movable link 15. The proximal end portion 10 of the support claw 7 is expanded and contracted in the radial direction by the forward and backward axial movement of the first movable body 5.

In FIG. 1, 16 is an elastic ring supply device. Its structure includes an engagement protrusion 19 at the tip of which the tip of the second movable body 6 comes into contact, and a notch 20 around which the support claw 7 is inserted, and a large number of elastic rings R on the outer peripheral surface. It is composed of a support shaft 17 that is fitted, and a push-up tube 18 of an elastic ring R that is swingably fitted onto the support shaft 17.

The operation from this elastic ring supplying device 16 to attaching the elastic ring R to the annular groove 23 of the attached body 22 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 modulus ring R from the elastic ring supply device 16. In Fig. 1, the elastic ring R
The working head 1 has just moved forward to receive the piston, and in this state the piston 3 is at the forward end,
The first movable body 5 is at the forward end position, and the second movable body 6
is also placed 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 contact tip 6a of the second movable body 6 contacts the engagement convex portion 19 of the elastic ring supply device 16, and the work head 1
At the forward movement end, as shown in FIG. 2, the forward movement of the second movable body 6 is restricted by the engagement convex portion 19, and the first movable body 5 moves relatively forward, causing the support claw 7 to also move forward. As a result, the link 9 connecting the second movable body 6, which has stopped moving, and the support claw 7 pulls the intermediate pivot point 8 radially inward, retracts and closes the support claw 7, and the elastic ring supply device The tip of the support claw 7 is inserted into the inner periphery of the elastic ring R located at the top of the 16 support shafts 17. 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 first movable link 15 moves to the swing link 1.
The second movable link 11 moves the proximal end 10 of the support claw 7 in the radial direction to retract and close it, causing the tip of the support claw 7 to expand slightly. The elastic ring 6 is expanded and supported so that it can be extracted from the support shaft 17.

When the work head 1 is moved backward after the elastic ring R is received by the support claw 7 in this way, the second movable body 6 is moved to the forward end by the elastic force of the spring 21, as shown in FIG. The link 9 expands the intermediate pivot point 8 in the radial direction, greatly expands the elastic ring R received at the tip of the support claw 7, and securely supports it without falling off naturally, so that it is covered as shown in FIG. It corresponds to the mounting body 22.

The contact tip 6 of the second movable body 6 is attached to the end face of the attached body 2.
a comes into contact with the work head 1, and as shown in FIG. 6, the diameter of the expanded elastic ring R is reduced on the outer circumferential surface of the attached body 22 by retracting and closing the support claw 7 until the forward movement end of the work head 1 is reached. let

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 10 of the support claw 7 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 amount of closing of the tip of the support claw 7, and the elastic ring R supported by the support claw 7 is reliably separated and inserted into the annular groove 23 of the attached body 22. It will be inserted automatically.

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 wide, so the elastic ring can be supported with a small number of support claws, and the elastic ring can be When removing the ring from the support claw, the support claw rotates around the intermediate pivot point, which allows for large angle changes in the support claw, allowing the elastic ring to reliably fit into the annular groove of the object to be attached. .

[Brief explanation of drawings]

The drawings show a cross section of the main part of the device of the present invention, and FIG.
Figures 2 and 3 show the state of receiving the elastic ring from the elastic ring supply device, and Figures 4 and 5 show the state in which the elastic ring is received from the elastic ring supply device.
6 and 7 show the state up to the time when the elastic ring is assembled to the object to be attached. Figure 8 is Figure 5A-
It is an A-line sectional view. DESCRIPTION OF SYMBOLS 1... Working head, 2... Cylinder, 3... Piston, 5... First movable body, 6... Second movable body,
7... Support claw, 8... Intermediate pivot point, 9... Link, 10... Base end portion, 11, 12, 13, 15...
…Link.

Claims (1)

[Claims] 1. A first movable body supported so as to be axially movable by a drive device with respect to the work head, and a contact that is movably supported by this first movable body so as to be movable in the same axial direction and comes into contact with the ring supply device, the attached body, etc. a second movable body having a tip, a spring for pushing the second movable body in the forward direction relative to the first movable body, and an intermediate point pivoted to the second movable body via a coupling link; and a plurality of support claws whose intermediate points expand and move in the radial direction by the forward movement of the second movable body; The tip of the swinging link and the base end of the support claw are pivotally connected by an intermediate link, and the swinging link and the intermediate link are connected by the forward and backward axial movement of the first movable body. A first movable link and a second movable link that expand and contract each base end portion of the support claw in conjunction with each other are arranged between the pivot point of the intermediate link and the swing link and the first movable body and the intermediate link. The link, the pivot point of the support claw, and the first
An elastic ring assembly device characterized by being pivotally connected to a movable body.