JPH0378214B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an elastic ring assembly device for mounting an elastic ring such as an O-ring into a groove of an assembly part.

[Prior Art] Conventionally, when inserting an elastic ring into a groove of an assembly part, it was inserted only by the elastic force of the elastic ring. For example, as shown in FIG. When fitting the assembly part b into the housing d, which is another member, after inserting it into the groove c, if the elastic ring a is not fully inserted into the groove c and protrudes, as shown in Fig. 9. The end of the elastic ring a may become pinched and a portion of it may protrude. As a result, the pinched portion may be cut off, resulting in a disadvantage that the sealing effect is adversely affected.

[Purpose of the invention]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned conventional drawbacks, the present invention aims to provide an elastic ring assembling device that can reliably attach an elastic ring to a groove of an assembling part.

[Structure of the invention]

The present invention is an assembling device for inserting an elastic ring into a groove of an assembling part, which comprises: a rotatable work head; a movable coupling body provided to be reciprocally movable in the direction of the rotation axis of the work head;
a plurality of support claws linked to the movable coupling body and swingable between an elastic ring support position where the elastic ring is expanded and supported and an elastic link insertion position where the elastic link is inserted into the groove of the assembly part; , an elastic ring pressing device that is installed in the work head and has a portion that can move toward and away from the groove of the assembly component, and that presses an elastic ring inserted into the groove in the direction of the groove. be done.

Here, the elastic ring pressing device is a device for further pressing the elastic ring inserted into the groove of the assembly part from the outside by the action of the support claw to ensure that the elastic ring is inserted into the groove, and is preferable. In terms of aspects,
A cylinder member is fixed to the work head, compressed air is sent into the cylinder, a piston that can reciprocate inside the cylinder is pushed, and a swingable ring holding member is operated, and the lower end of the holding member is pressed. It is preferable that a roller provided in the work rod be in contact with the elastic ring so that the roller is caused to roll onto the elastic ring by rotating the working rod.

〔Effect of the invention〕

According to the present invention, the elastic ring can be inserted into the groove of the assembly part by the operation of the support claw;
Since the elastic ring can be reliably pressed and inserted into the groove by the elastic ring pressing device after the insertion, a part of the elastic ring does not come into contact with the housing and the assembly part when the assembled part is assembled into the housing after the insertion. There will be no chance of getting caught and cut off.

〔Example〕

Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, in which reference numerals 1 and 2 are working heads that are fixed to each other, and the upper working head 1 of the working heads 1 and 2 is not shown. The lower part of the working head 2 is connected to a mounting seat which is rotatably supported at the tip of the arm of the robot and rotated by a drive motor. The working heads 1, 2 are rotatable about an axis O.

A first piston 4, which is urged downward by a spring 3, is provided in the cylinder 2a so as to be slidable in the axial direction, and a first piston 4, which is urged upward by a spring 5, is provided in the other cylinder 2b. The second
A piston 6 is provided slidably in the axial direction. Air chambers 4A and 6A are formed on the lower surface of the first piston 4 and the upper surface of the second piston 6, respectively. The first piston 4 is formed with a rod portion 4a extending downward, and a movable connecting body 7 is screwed and fixed to the second piston 6, and the rod portion 4a is formed in the center hole of the connecting body 7. is configured to be able to freely slide back and forth.

At the outer periphery of the lower end of the working head 2, there are 6
The supports 8 (see Fig. 3) are connected to the bolts 9 (second
(Fig.) is fixed. The upper end of a link 11 is pivotally connected to the inside of each of the supports 8 by a pin 12, while another link 13 is pivotally connected to the lower end of the movable connector 7 by a pin 14. The other end is pivotally connected to approximately the center of the link 11 by a pin 15. Further, an intermediate member 16 is fixed to the lower end of the support body 8, a guide groove 18 is formed in the lateral direction in the intermediate member 16, and a pin provided at the lower end of the link 11 is formed in the longitudinal direction of the groove 18. 19 is slidably engaged.

Further, support claws 21 (six in total) extending downward are pivotally attached to the lower end of the link 11 by the pin 19, and the claws 21 can swing around the pin 19 while also extending in the longitudinal direction of the guide groove 18. can be moved to. On the other hand, a movable connecting body 22 is screwed and fixed to the lower end of the rod portion 4a, and one end of a link 23 is pivotally connected to six positions on the circumference of the lower end of the connecting body 22 by a pin 24. The end is the support claw 2
1 by means of a pin 25.

In FIG. 3 and FIG. 4, which is a cross-sectional view taken along the line -2 in FIG. A piston 27 that can move up and down is attached to the piston 27, and a ring holding member 29 that can swing freely around a pin 28 is pivotally attached to the lower end of the piston 27. An air chamber 27A is formed on the upper surface of the piston 27, into which compressed air can be fed through an inlet 27B. A roller 31 is provided at the lower end of the ring pressing member 29.
Each component numbered 26 to 31 above constitutes an "elastic ring pressing device" D.

The roller 31 normally has a spring 32
The air chamber 27A is held in a position where it does not interfere with the insertion of the elastic ring a.
When compressed air is sent into the piston 27 and the piston 27 moves downward against the spring 32, the ring holding member 29 swings as shown by the two-dot chain line in FIG. An elastic ring (not shown) is pressed into the groove c of b.

Further, four of the six supports 8 have pressing rods 33 at bent portions extending downward from the support plate 17 fixed to the supports 8 so as to be able to reciprocate vertically. It is provided. The rod 33 has large diameter portions 33a and 3 at its upper and lower ends, respectively.
3b is formed, and the large diameter portion 33a is urged upward by a coil spring 34. When the movable connecting body 7 is lowered, the upper large diameter portion 33a is moved by the radially extending portion 7a.
The upper end surface is pressed so that the lower large diameter portion 33b can be lowered to the position shown by the two-dot chain line in FIG. The pressing rod 33, spring 34, and plate 17 constitute a "pressing rod device" E.

Next, the operation of this embodiment will be described.

In this device in the state shown in Fig. 1, the rod part 4a is raised by sending compressed air from the air chamber 4A, and the lower links 23, 21 are brought into the state shown in Fig. 5 (this state is referred to as "elastic ring removal"). (referred to as "position"). In this state, by moving the entire device attached to the robot arm, a support claw is attached to the inner periphery of the uppermost O-ring a installed on the outer periphery of the storage drum 35 as shown in FIG. positioning the lower end protrusion 21a of 21;
By lowering the rod 4a again, the support claw 21 is swung as shown by the two-dot chain line in FIG.
The ring a is held in an expanded state (this state is referred to as the "elastic ring support position").

Next, by moving the entire device, the sixth
The device is moved to the location where the assembly part b as shown in the figure is placed, and the movable coupling body 7 is lowered by sending compressed air to the air chamber 6A in FIG. make it swing around,
Slide the pin 19 outward along the guide groove 18. As a result, the link 21 swings around the pin 25 to reach the state shown in FIG. It pops out and is inserted into the groove c of the assembly part b.

However, the ring a is not always inserted into the groove c accurately, and it protrudes as shown in the protrusion amount e in Fig. 7, which causes the ring breakage phenomenon as shown in Fig. 9. . For this reason, the elastic ring pressing device D shown in FIG. 4 is provided, and in order to operate the pressing device D, compressed air is introduced into the air chamber 2
A, the ring holding member 29 is swung around the pin 28, and the entire device is further rotated around the axis O while the roller 31 is brought into contact with the ring a. In the pressing rod device E, when the elastic ring loading position is reached as shown in FIG. 6, the movable coupling body 7 is lowered to the position shown in FIG. By pressing the end face, the lower large diameter portion 33b acts to reliably push the elastic ring a into the groove c. However, this pressing rod device E is not absolutely necessary.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention, FIG. 2 is a partial side view seen from the direction of FIG. 1, and FIG.
The figure is a cross-sectional view taken along the - line in Figure 1, and Figure 4 is a cross-sectional view of Figure 3.
5 and 6 are operating condition diagrams showing the lower half of FIG. , 8 and 9 show conventional examples, and are cross-sectional views showing a situation in which an elastic ring a is assembled to an assembly part b, and then the part b is assembled to a housing d. 1, 2... Working head, 4, 6... Piston,
7...Movable coupling body, 11, 13...Link, 21
...Support claw, D...Elastic ring pressing device, E...
Pressing rod device, a... elastic ring (O ring), b... assembly parts.

Claims (1)

[Scope of Claims] 1. An assembly device for inserting an elastic ring into a groove of an assembly part, comprising: a rotatable working head; and a movable connection provided to be able to reciprocate in the direction of the rotational axis of the working head. body and
a plurality of support claws linked to the movable coupling body and swingable between an elastic ring support position where the elastic ring is expanded and supported and an elastic ring insertion position where the elastic ring is inserted into the groove of the assembly component; and an elastic ring pressing device that is installed in the work head and has a part that can move toward and away from the groove of the assembly part, and that presses an elastic ring inserted into the groove in the direction of the groove. An elastic ring assembly device comprising: 2. The elastic ring pressing device includes a cylinder member fixed to the work head, a piston member that reciprocates within the cylinder member, a ring holding member that is swung by the piston member, and a ring holding member provided at the end of the holding member. 2. The elastic ring assembling device according to claim 1, further comprising a roller which is brought into contact with the elastic ring.