JP2000296423A - Internally fitting ring built-in device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically and internally fitting a ring into a work by providing enlarging elements which enlarge an elastic ring held into an approximately heart shape by a pin from the inside and fit it into a prescribed position of the work. SOLUTION: A butt plate 29 advances to dent an elastic ring 31. Then, the ring 31 is regulated by a roller 16, a presser plate 23a, and the butt plate 29 so that its diameter is contracted into an approximately heart shape. With the advancement of the butt plate 29, a pin 8 is entered into its groove 29a to hold the approximately heart shape of the ring 31. A mount board 10 is raised to set a work 32 on the mount board 10. Then, the pin 8 is lowered, two enlarging elements 23, 24 are moved in the outer circumferential direction respectively, and the ring 31 is enlarged by the presser plates 23b, 24b and fitted in a fitting position 32a of the work 32. In this case, the enlarging elements 23, 24 enlarge a part of the ring 31 butted by the butt plate 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner fitting ring assembling apparatus for fitting an elastic ring such as an O-ring or a seal into a groove or the like formed on the inner periphery of a work.

[0002]

2. Description of the Related Art There are two types of elastic rings of this type, an external fitting type and an internal fitting type. Both of them have to be accurately fitted into a groove or the like formed at a predetermined position of a work. No. Heretofore, this work has been mostly performed manually, but has the disadvantage of poor reliability because it is performed manually. Also, it can be said that a large diameter requires a certain amount of force and is tight for girls and the like.

For this reason, the present inventors have proposed an assembling device for automatically fitting an elastic ring to a work (Japanese Patent Laid-Open No. 10-15749). It was to be fitted around the work. When trying to fit the elastic ring to the inner circumference of the work, keep the elastic ring in the reduced diameter state and bring it to the fitting point,
After that, it must be spread smoothly, but it is difficult to perform this operation inside a narrow work. However, as a result of diligent research conducted by the present inventors, a mechanism for accurately and efficiently performing the diameter-reducing and diameter-enlarging operations has been found, and here, an inner fitting ring assembling device has been proposed.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a cylindrical work having an elastic ring mounted thereon and having the elastic ring recessed in a predetermined shape set up on the outer periphery of the elastic ring. A mounting plate for raising the elastic ring to a predetermined position, a pushing plate for pressing the outer periphery of the elastic ring to concave the elastic ring into a substantially heart shape, and a pin for raising the outer periphery of the concave portion of the elastic ring to keep the elastic ring in a substantially heart shape; An internal fitting ring assembling device, characterized in that the elastic ring is expanded from the inside when the board is raised, and is expanded to fit into a predetermined portion of the work.

[0005] By taking the above measures, the present invention reduces the diameter of the elastic ring by recessing the elastic ring into a substantially heart shape by means of a pushing plate, and retains its shape by means of a pin. The placing plate lifts the elastic ring to a predetermined position with respect to the work, and the diameter of the elastic ring is expanded by the expanding body so that the elastic ring is securely fitted at a predetermined position.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 are partial cross-sectional front views of an inner fitting ring assembling apparatus showing an example of the present invention, and FIG. 3 is a partial plan view of the inner fitting ring assembling apparatus (hereinafter, assembling apparatus). Is a construction in which a fixed base 3 is erected from a base 1 by erecting a support 2, and an elevating base 5 is suspended from the fixed base 3 by a telescopic cylinder 4 such as an air cylinder. The elevating base 5 rises when the telescopic cylinder 4 contracts and descends when the telescopic cylinder 4 expands. In order to perform this movement smoothly, the guide rod 6 is suspended from the fixed base 3 and slides on the elevating base 5. Inserted as possible.

The elevating base 5 is provided with a pin 8 (9 is a pin guide) which is moved up and down by the expansion and contraction of the telescopic cylinder 7 at the center thereof. A board 10 is attached. This loading board 1
0 has a hole 11 at the center of its upper surface, through which the pin 8 can be inserted, and a long groove 12 in the left-right direction of the hole 11. The mounting board 10 has a low step portion 13 formed on the outer periphery thereof, and the low step portion 13 has vertical grooves 14 formed at regular intervals. The vertical groove 14 has the fixed base 3
The upper surface of the piece 15 is substantially flush with the upper surface of the placing board 10. The piece 15 also serves as a guide when the placing board 10 moves up and down.

Further, a plurality of rollers 16 are provided on the upper surface of the mounting board 10 with a pin 17 as a core, and a mounting plate 18 is mounted on an upper end of the pin 17.
Is mounted with a rotary actuator 19. A top plate 20 is provided below the mounting plate 18 and above the loading board 10 with a gap between the rollers 16. This top plate 20
Has a fan shape divided into an appropriate number, each of which is guided by a guide 21 so as to be movable in a radial direction. The top plate 20 and the rotating part of the rotary actuator 19 are connected by a link 22.

Between the loading board 10 and the top plate 20, two expanding members 23 and 24 are provided so as to be able to move in the long groove 12. The expansion bodies 23 and 24 are provided in the mounting board 10, and the mounting bodies 23 a and 24 a whose necks are inserted into the upper side of the long groove 12 and are back to back, and a flat surface mounted on the front surface of the neck above the mounting board 10. It is composed of push plates 23b and 24b having a bow shape. Each mounting body 23a, 24
The telescopic cylinders 25 and 26 are attached to a, and when the telescopic cylinders 25 and 26 expand and contract, the respective push plates 23b and 24a are connected to the guides 3 provided on the side surfaces.
It is guided by 5 and 36, and moves in the long groove 12 in the outer peripheral direction, respectively.

On the side of the mounting plate 10 and on the extension of the long groove 12, there is also a push plate 29 which is guided by a guide 28 by the expansion and contraction of the telescopic cylinder 27 and advances and retreats to the side position and near the center of the mounting plate 10. Is provided. A groove 29a cut into a U-shape is formed at the tip of the abutting plate 29. In addition,
The upper part of the rotary actuator 19 is covered with a cover 30.

Next, a description will be given of a case where the inner fitting ring is incorporated into a work by the assembling apparatus having the above configuration. FIG. 4 is a partial cross-sectional front view of the mounting plate 10 and the top plate 20 showing this. First, an elastic ring (hereinafter referred to as a ring) 31 for internal fitting is passed through the top plate 20 to place the mounting plate 10. And put it on the piece 15. When the ring 31 is mounted, the top plate 20 expands, but the spread of the top plate 20 is to prevent the ring 31 from rolling upward when the thrust plate 29 advances and the ring 31 is depressed. is there.
Therefore, this mechanism is not always necessary depending on the shape and material of the ring 31.

Next, the thrust plate 29 moves forward and the ring 31
But the veneer plate 29 has its groove 29a
Go past the center of. FIG. 5 is a partial plan view of the placing board 10 showing this state. At this time, the ring 31 is restricted by the roller 16, the push plate 23a, and the thrust plate 29 and is reduced in diameter to such a substantially heart shape. Shape.
When the thrust plate 29 moves forward, the pin 8 enters the groove 29a (the outer peripheral position of the ring 31 recessed by the thrust plate 29), and the substantially heart-shaped shape of the ring 31 is maintained (the pin 8 is inserted). Then, the pushing plate 29 retreats).

In this state, the placing board 10 is raised, so that the work 32 is set on the low step portion 13 of the raised placing board 10. When the work 32 is set, the pin 8 is lowered, and the two expanding members 23 and 24 move in the outer peripheral direction, respectively, and the ring 31 is moved by its push plates 23b and 24b.
The work 32 is expanded by being pressed by the
At the fitting point 32a. At this time, the expansion body 2
In the parts 3 and 24, the portion where the ring 31 is protruded by the protruding plate 29 is expanded, so that the diameter expansion returning to the original shape is reliably performed. When the work 32 is removed after the above operation, the placing board 10 is lowered to the original position.

By the way, the series of operations as described above may be a manual operation by pressing the start button of each element, or the end of operation of each element is detected by a timer or a limit (or proximity) switch. May be performed automatically by the sequence control or the like.

[0015]

As described above, according to the embedding device according to the present invention,
Conventionally, the inside of the ring can be automatically fitted to the work, which has conventionally relied on cumbersome manual work, thereby improving efficiency, saving labor, and ensuring accuracy.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view of an inner fitting ring assembling apparatus showing an example of the present invention.

FIG. 2 is a partial cross-sectional front view of an inner fitting ring assembling apparatus showing an example of the present invention.

FIG. 3 is a plan view of an inner fitting ring assembling apparatus showing an example of the present invention.

FIG. 4 is a partial cross-sectional front view in an operating state of the inner fitting ring assembling device showing an example of the present invention.

FIG. 5 is a partial plan view showing an example of the present invention in an operating state of the inner fitting ring assembling device.

FIG. 6 is a partial cross-sectional front view showing an example of the present invention in an operating state of the inner fitting ring assembling device.

[Explanation of symbols]

 8 pin 10 mounting board 20 top plate 29 thrust plate 31 elastic ring 32 work

Claims (2)

[Claims] A mounting plate for mounting an elastic ring, and for raising the elastic ring depressed into a predetermined shape to a predetermined position of a cylindrical work set up on the outer periphery of the elastic ring;
A push plate that presses the outer periphery of the elastic ring to concave the elastic ring into a substantially heart shape, a pin that raises the outer periphery of the concave portion of the elastic ring to keep the elastic ring in a substantially heart shape, and when the mounting board rises An expanding member for expanding the elastic ring from the inside and fitting the elastic ring into a predetermined portion of the work. 2. The device according to claim 1, further comprising a top plate that covers an upper portion of the elastic ring and expands the diameter of the elastic ring when the elastic ring is depressed by the pushing plate to restrict the elastic ring from being turned upward. .