JPH10138055A - C-shaped retaining ring inserting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily install C-shaped retaining rings in a groove of a mating member by providing a pair of engaging means to engage with an engaging object part of the C-shaped retaining rings held by a C-shaped retaining ring holding part and an expanding/contracting means to expand and contract the C-shaped retaining rings by moving a pair of engaging means in the mutually contacting/separating direction. SOLUTION: After C-shaped rings 38... are dropped in a guide shaft 36 from the upper end, an air cylinder 28 is protrusively moved, and a step part 44 of a slider 24 is positioned under the guide shaft 36, and the lowest retaining ring 38 is received by the step part 44. Next, the air cylinder 28 is contractedly moved, and the retaining rings 38 are sent under a tip 38 for chucks, and then, an air cylinder 50 is protrusively moved, and a pin 94 of the tip 88 is inserted into small holes on both ends of the retaining rings 38. Next, an air cylinder 63 is protrusively moved, and a pair of chucks 72 are separated from each other, and the retaining rings 38 are diametrically expanded. Afterwards, a chuck guide block 76 is moved upward, the chucks 72 are approached to each other, and the diametrically contracted retaining rings 38 are fitted to and installed in a groove 108 of a shaft 100.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a C-shaped retaining ring insertion machine for inserting a C-shaped retaining ring into a mounting groove of a member to be mounted.

[0002]

2. Description of the Related Art Conventionally, as a method of inserting a C-shaped retaining ring for a shaft into a groove of the shaft, a method of expanding the diameter of a C-shaped retaining ring for a shaft with a pliers-shaped special tool, and FIG. As shown, a tapered jig 400 is attached to the end of the shaft 100, and the C-shaped retaining ring 38 is slid by a pipe-shaped member 402 attached to a press device or the like, and the C-shaped retaining ring 38 is inserted into the groove of the shaft 100. 1
08 was inserted.

Further, as a method of inserting a C-shaped retaining ring for a hole into a groove formed on the inner wall surface of the hole, a method of reducing the diameter of the C-shaped retaining ring for a hole with a pliers-shaped dedicated tool and inserting the same. , FIG. 35
A jig 406 having a tapered hole 404 as shown in FIG.
Is attached to the end of the member 410 having the hole 408,
There has been a method in which a C-shaped retaining ring 302 for a hole is pushed into the groove 322 by using a rod member 412 attached to a press device or the like.

[0004]

However, in order to expand or reduce the diameter of the C-shaped retaining ring with a pliers-shaped special tool, a gripping force is required, and since it is a manual operation, it is inefficient and not suitable for mass production. .

[0005] Further, when inserting using a jig, no force is required, but the outer peripheral surface of the shaft 100 and the inner peripheral surface of the hole 408 are C-shaped.
There is a problem that the retaining ring is damaged when sliding.

The present invention has been made in consideration of the above-described circumstances, and has as its object to provide a C-type retaining ring insertion machine that can easily attach a C-type retaining ring to a groove of a mating member without damaging a shaft or a hole. .

[0007]

The invention according to claim 1 is a C-type retaining ring insertion machine for inserting a C-type retaining ring into a mounting groove of a member to be mounted, wherein the C-type retaining ring is held. C-shaped retaining ring holding portion, and C held by the C-shaped retaining ring holding portion
A pair of engaging means for engaging engaged portions provided at both ends in the circumferential direction of the retaining ring, and the pair of engaging means are moved in a direction of coming and coming from each other to expand and contract the C-shaped retaining ring. And an expanding / contracting means for performing the expansion / contraction.

[0008] In the C-shaped retaining ring insertion machine according to claim 1,
First, the C-shaped retaining ring is held in a positioned state on the C-shaped retaining ring holding portion, and a pair of engaging means is engaged with the engaged portion of the retained C-shaped retaining ring.

Here, when the C-shaped retaining ring is for a shaft, the expanding and contracting means is operated to expand the diameter of the C-shaped retaining ring so that the inner diameter of the C-shaped retaining ring is larger than the shaft diameter. The shaft is inserted into the C-shaped retaining ring whose diameter has been increased in this way, and after the shaft mounting groove and the C-shaped retaining ring are made to correspond to each other, the expanding / reducing means is operated to reduce the diameter of the C-shaped retaining ring. If it returns to the diameter, the C-shaped retaining ring is inserted into the mounting groove of the shaft.

On the other hand, when the C-shaped retaining ring is for a hole, the expanding / reducing means is operated to reduce the diameter of the C-shaped retaining ring so that the outer diameter of the C-shaped retaining ring becomes smaller than the hole diameter. The C-shaped retaining ring whose diameter has been reduced in this way is inserted into the hole, and the mounting groove for the hole and the C-shaped retaining ring are made to correspond to each other. If it returns to the diameter, the C-shaped retaining ring is inserted into the mounting groove of the hole.

According to the C-shaped retaining ring insertion machine of the present invention, the C-shaped retaining ring does not slide on the outer peripheral surface of the shaft or the inner peripheral surface of the hole.
The outer peripheral surface of the shaft and the inner peripheral surface of the hole are not damaged. In addition, since the C-shaped retaining ring is expanded and contracted by the expanding and contracting means, the work can be efficiently performed.

According to a second aspect of the present invention, the pair of engaging means are driven to mount the C-shaped retaining ring at a predetermined position from the C-shaped retaining ring holding portion. Characterized by having moving means for moving toward.

[0013] In the C-shaped retaining ring insertion machine according to claim 2,
The pair of engaging means supporting the C-shaped retaining ring is driven by the moving means, and the C-shaped retaining ring is moved toward the mounting groove of the mounted member positioned at a predetermined position. Therefore, if the C-shaped retaining ring is held by the C-shaped retaining ring holding portion,
The shape retaining ring can be automatically attached to the mounting groove, so that work can be performed efficiently.

According to a third aspect of the present invention, there is provided a supply means for loading a plurality of the C-shaped retaining rings and supplying the loaded C-shaped retaining rings one by one to the C-shaped retaining ring holding portion. It is characterized by.

According to a third aspect of the present invention, there is provided a C-type snap ring inserting machine.
The supply means can be loaded with a plurality of C-shaped retaining rings.
Since the supply means can supply the loaded C-shaped retaining rings one by one to the C-shaped retaining ring holding portion, it is compared with a case where the C-shaped retaining rings are manually supplied to the C-shaped retaining ring retaining portion one by one. Work efficiently. Note that the supply unit can be manually operated.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A first embodiment of a C-shaped retaining ring insertion machine according to the present invention will be described with reference to FIGS.

As shown in FIGS. 1 and 2, a C-shaped retaining ring insertion machine 10 includes a base plate 12, a side plate 1
4, a U-shaped frame 20 including a cylinder mounting plate 16 and a reinforcing plate 18 is provided.

A wide groove 22 is formed in the base plate 12, and a slider 24 is slidably inserted into the groove 22.

As shown in FIG. 2, one end of the slider 24 is on the rear side of the side plate 14 (in the direction of arrow B in the figure).
One end of the slider mounting plate 26 is fixed to one end of the slider mounting plate 26 with a screw (not shown).

As shown in FIG. 3A, a first air cylinder 28 is attached to the side plate 14 in parallel with the slider 24, and a cylinder rod 30 of the first air cylinder 28 is attached to the slider mounting plate. 2
6 is fixed to the other end by a nut 32.

As shown in FIGS. 2 and 3A, a guide shaft 36 is attached to the side plate 14 via an L-shaped metal plate 34 on the front side (in the direction of the arrow F in the figure). .

As shown in FIG. 2, the guide shaft 36 is disposed vertically, and a small gap (a C-shaped retaining ring 3 for the shaft) is provided between the lower end of the guide shaft 36 and the slider 24.
8 (dimension smaller than the thickness of 8).

The outer diameter of the guide shaft 36 is slightly smaller than the inner diameter of the C-shaped retaining ring 38 for the shaft.
4 has a gap 40 (see FIG. 3) of the C-shaped retaining ring 38 for the shaft.
(See (B)), a plurality of C-shaped retaining rings 38 for shafts can be dropped from the upper end of the guide shaft 36 in one direction.

As shown in FIGS. 2 and 3 (A), a U-shaped relief 42 is formed in the cylinder mounting plate 16, and a C-shaped snap ring 38 for the shaft is mounted on the cylinder mounting plate 16 from above. It can be dropped.

As shown in FIGS. 5A and 5B, the other end of the slider 24 is formed as a C-shaped retaining ring holding portion having a depth substantially equal to the thickness of the C-shaped retaining ring 38 for the shaft. Is provided. An elongated guide 46 extending in the longitudinal direction of the slider 24 is formed at the step portion 44 so as to protrude toward the center in the width direction.
8 are formed so as to protrude. By these guides 46 and stoppers 48, the C-shaped retaining ring 38 for the shaft is shown in FIG.
Are positioned as shown in FIG. The width of the slider 24 is slightly larger than the outer diameter of the ring-shaped portion of the shaft C-shaped retaining ring 38 so that the slider 24 does not contact the inner wall surface of the groove 22 of the base plate 12.

A thin leaf spring 49 for pressing the upper surface of the slider 24 is attached to the base plate 12.

As shown in FIGS. 2 and 3A, a second air cylinder 50 is mounted on the upper surface of the cylinder mounting plate 16 as moving means.

As shown in FIG. 2, the cylinder rod 52 of the second air cylinder 50 is
6 protrudes downward through an escape hole 54 formed in the third air cylinder 6 by means of a collar 56, a mounting plate 58 and bolts 60.
2 are installed.

As shown in FIGS. 1 and 2, a pair of parallel guide shafts 65 are vertically fixed to the upper surface of the third air cylinder 62. The pair of guide shafts 65 are inserted into a bush 64 mounted on the cylinder mounting plate 16 so that when the cylinder rod 52 of the second air cylinder 50 moves in and out, the third air cylinder 62 moves up and down smoothly. To guide. Note that a coil spring 66 for urging the third air cylinder 62 downward is inserted into the guide shaft 65.

As shown in FIG. 1, a substantially L-shaped chuck bracket 68 is attached to the lower surface of the third air cylinder 62 so as to face each other.

Holes 70 are formed on the inner surfaces of the chuck brackets 68 facing each other. The holes 70 are formed at the ends of guide shafts 71 which are bridged from one chuck bracket 68 to the other chuck bracket 68. Is inserted. The guide shaft 71 is positioned in a direction orthogonal to the sliding direction of the slider 24 described above.

A pair of chucks 72 are disposed between the chuck brackets 68. On the side surfaces of the chucks 72 facing each other, tapered surfaces 72A are formed so that the distance between the chucks 72 increases upward.

A bush 74 is attached to the chuck 72, and a guide shaft 71 is inserted into the bush 74. Therefore, these chucks 72 are guided by the guide shaft 71 and can slide in a direction orthogonal to the sliding direction of the slider 24.

[0034] Between the chucks 72,
A chuck guide block 76 that is formed in a tapered shape that becomes narrower toward the lower side is arranged. The chuck guide block 76 is fixed to the cylinder rod 80 of the third air cylinder 62 by bolts 78.
Attached to.

A stroke adjusting screw 82 is screwed into the side plate 68A of the chuck bracket 68. The tip of the stroke adjusting screw 82 is formed into a thin round bar shape. The round bar portion 82A of the stroke adjusting screw 82 is inserted into a hole 84 formed on the side surface of the chuck 72, and the amount of movement of the chuck 72 is limited by abutting the tip of the round bar portion 82A against the bottom of the hole 84. I do.

A spring 86 is inserted into the round bar portion 82A of the stroke adjusting screw 82 so that the tapered surface 72A of the chuck 72 is fixed to the chuck guide block 76.
To the tapered surface 76A. Therefore, when the chuck guide block 76 moves downward, the chucks 72 separate from each other and the springs 86 are compressed, and when the chuck guide block 76 moves upward, the chucks 72 pressed by the springs 86 approach each other.

As shown in FIGS. 1 and 2, a chuck tip 88 is attached to the lower surface of each chuck 72 by bolts (not shown).

The lower surface of the chuck chip 88 has a shaft C
A groove 9 having a depth substantially equal to the thickness of the retaining ring 38;
0 is formed.

As shown in FIG. 1, the groove width of the two grooves 90 when the chuck chips 88 are in contact with each other is slightly larger than the width of the slider 24.

The chuck tip 88 is formed with a fine hole 92 penetrating vertically, into which a hardened steel pin 94 is inserted from above. The pin 94 can be replaced by removing the chuck tip 88 from the chuck 72.

The tip of the pin 94 protrudes from the bottom of the groove 90 by substantially the same size as the thickness of the C-shaped retaining ring 38 for the shaft, and the pin 94 when the chucking chips 88 are in contact with each other. The pitch between them is the same as the pitch between the small holes 96 as the engaged portions formed at both ends in the circumferential direction of the C-shaped retaining ring 38 for the shaft as shown in FIG. 3B.

As shown in FIGS. 2 and 4, each of the chucking chips 88 has a recess 98 near the pin 94 which forms a round hole when they come into contact with each other. The round hole formed by the pair of recesses 98 is used for the C-shaped retaining ring 38 for the shaft.
Is an escape hole into which the end of the shaft 100 for attaching the shaft is inserted.

As shown in FIG. 2, the C-type snap ring inserting machine 10
A pallet 106 on which a jig 104 having a hole 102 formed thereon is placed, and a hole 1 of the jig 104
The shaft 100 for mounting the shaft C-shaped retaining ring 38 is inserted into the shaft 02.

The third air cylinder 62, chuck bracket 68, guide shaft 71, chuck 72, bush 74, chuck guide block 76, bolt 78,
The stroke adjusting screw 82, the spring 86, and the chuck tip 88 constitute the expansion / contraction means of the present invention.

The slider 24 (step 44), the slider mounting plate 26, the first air cylinder 28,
The L-shaped metal plate 34 and the guide shaft 36 constitute the supply means of the present invention. (Operation) Next, the operation of the C-type snap ring insertion machine 10 of the present embodiment will be described. (1) First, as shown in FIG.
A plurality of C-shaped retaining rings for shaft 38 are dropped from the upper end of the shaft. (2) As shown in FIG. 6, the first air cylinder 28
Of the slider 24 so as to position the step portion 44 of the slider 24 below the guide shaft 36. As a result, the lowermost C-shaped retaining ring 38 for the shaft is positioned on the step portion 44 as shown in FIG. (3) Next, as shown in FIG.
And the C-shaped retaining ring 38 for the shaft positioned on the step portion 44 of the slider 24 is positioned below the chuck tip 88. (4) The cylinder rod 5 of the second air cylinder 50
2 is projected, and as shown in FIG.
Is moved downward until the bottom surface of the groove 90 contacts the C-shaped retaining ring 38 for the shaft. Thereby, the chuck tip 88
The pin 94 is inserted into the small hole 96 of the C-shaped retaining ring 38 as shown in FIG. (5) Next, as shown in FIG. 10, the cylinder rod 80 of the third air cylinder 62 is protruded to move the chuck guide block 76 downward. As a result, the chucks 72 are separated from each other, and as shown in FIG. ), And the C-shaped retaining ring 38 for the shaft is
Is held by (6) Next, the chuck tip 88 holding the shaft C-shaped retaining ring 38 is moved upward, and the slider 24 is moved in the direction indicated by the arrow B.
In the direction of movement and retract, and the step portion 44 is
6 below. As a result, the next C-shaped retaining ring 38 for the shaft is positioned at the step portion 44. (7) Next, as shown in FIG.
Is moved downward, the end of the shaft 100 held by the jig 104 of the pallet 106 is inserted into the recess 98 of the chuck chip 88, and the C-shaped retaining ring 38 for the shaft is moved to the shaft 100. Of the groove 108. (8) Next, when the chuck guide block 76 is moved upward to bring the chucks 72 closer to each other, the C-shaped retaining ring 38 for the shaft is reduced in diameter, and the C-shaped retaining ring 38 for the shaft is inserted into the groove 108 of the shaft 100. Inserted. (9) Thereafter, the cylinder rod 52 of the second air cylinder 50 is retracted, and the chuck tip 88 returns to the original position (see FIG. 1). Then, the pallet 106 is moved to position the next shaft 100 below the chuck tip 88.

Thereafter, by repeating the above-mentioned steps (2) to (9), the C-shaped retaining ring 38 for the shaft can be inserted into the groove 108 of the shaft 100 one after another.

As described above, if the C-shaped retaining ring insertion machine 10 of the present embodiment is used, the C-shaped retaining ring 38 for the shaft is automatically moved to the shaft 10.
0 can be inserted into the groove 108. In addition, in the C-shaped retaining ring insertion machine 10 of the present embodiment, since the diameter of the C-shaped retaining ring for shaft 38 is increased and then inserted into the shaft 100, the surface of the shaft 100 may be damaged by the C-shaped retaining ring for shaft 38. There is no.

In this embodiment, a wedge-shaped chuck guide block 76 connected to the third air cylinder 62 is taken in and out between the chucks 72 to move the chuck chips 88 in the direction of coming and going. However, the chuck chips 88 may be moved by using another mechanism such as a link mechanism, or the chuck chips 88 may be moved in a direction in which the chuck chips 88 come and go with the air cylinders facing each other.

Although an air cylinder is used as a means for moving the mechanism, a combination of a feed screw and a motor,
Combination of rack and pinion mechanism and motor, etc.
The component may be moved using other means.

A pin for inserting into the small hole 96 of the C-shaped retaining ring 38 is provided at the tip of a pliers-shaped special tool used for mounting the C-shaped retaining ring 38 for the shaft. When the C-shaped retaining ring for shaft 38 is expanded or contracted, the outer peripheral surface of the pin rubs obliquely against the inner wall surface of the small hole 96. For this reason, there is a problem that the pin tends to be unevenly worn. If the pin is unevenly worn, there is also a problem that the pin is easily detached from the small hole 96. On the other hand, in the C-shaped retaining ring insertion machine 10 of the present embodiment, since the pair of pins 94 move linearly while remaining parallel to each other,
The outer peripheral surface of the pin 94 is in parallel with the inner wall surface of the pin 6. For this reason, the pin 94 is hardly worn and can withstand long-term use. [Second Embodiment] A second embodiment of a C-shaped retaining ring insertion machine according to the present invention will be described with reference to FIGS. The same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The C-shaped retaining ring insertion machine 200 of the present embodiment
Small shaft C as shown in Fig. 13 used for small diameter shaft
This is used when inserting the retaining ring 202.

As shown in FIGS. 13 and 14, a holder 204 is mounted on the side plate 14 on the front side (in the direction of arrow F in the figure). A hole 206 having a shape similar to the outer shape of the small C-shaped retaining ring 202 for a shaft is vertically penetrated in the holder 204, and the small C-shaped retaining ring 202 for a shaft is dropped into this hole 206. I have.

The slider 24 has a circular hole 210 and a groove 212 formed on the upper surface in the direction of arrow F. Circular hole 2
A bush 214 is press-fitted into 10, and a cylindrical slide block 216 is slidably inserted into the bush 214.

The recess 2 is formed on the upper surface of the slide block 216.
As shown in FIGS. 13 and 15, the concave portion 218 has a wide portion 218A into which the ring-shaped portion 202A of the small C-shaped retaining ring 202 is inserted, and a small C-shaped shaft. And a narrow portion 218B into which the protruding portion 202B of the retaining ring 202 is inserted.

As shown in FIG. 14, the slide block 2
16 is urged upward by a spring 220 provided in the circular hole 210, and the wide portion 218 </ b> A of the concave portion 218 contacts the plate 222 attached to the groove 212 of the slider 24 as shown in FIGS. 13 to 15. ing.

Normally, as shown in FIGS. 13 and 15, the upper end of the slide block 216 is flush with the upper surface of the slider 24, and the upper surface of the plate 222 is a small C-shaped stopper for the shaft from the upper surface of the slider 24. It is at a position lowered by the thickness of the wheel 202.

The concave portion 21 of the slide block 216
The C-shaped retaining ring holding portion of the present invention is constituted by the plate 8 and the plate 222. (Operation) Next, the operation of the C-shaped snap ring inserting machine 200 of the present embodiment will be described. (1) First, as shown in FIG. 14, a plurality of small-sized C-shaped retaining rings 202 for a shaft are dropped into holes 206 of a holder 204. (2) Next, the slider 24 is moved to position the slide block 216 below the guide shaft 36 as shown in FIG. By this, the bottom small shaft C
A retaining ring 202 is positioned on the upper surface of the plate 222. (3) Next, the slider 24 is moved and the plate 22 is moved.
After the small C-shaped snap ring 202 for the shaft positioned on the upper surface of the chuck 2 is positioned below the chuck tip 88, the second air cylinder 50 is operated to operate the chuck tip 88 as shown in FIGS. The groove 90 is moved downward until the bottom surface of the groove 90 abuts against the small C-shaped retaining ring 202 for the shaft. As a result, the pin 94 of the chuck tip 88 is inserted into the notch 202C of the small C-shaped retaining ring 202, and the slide block 216 pressed by the chuck tip 88 slides downward. (5) Next, the chuck tips 88 are separated from each other to expand the diameter of the small C-shaped retaining ring 202 for the shaft.
The retaining ring 202 is held by the pin 94. (6) Next, the chuck tip 88 holding the small shaft C-shaped retaining ring 202 is moved upward, and the slider 24 is moved.
Is moved in the direction of arrow B to retract, and the slide block 2 is moved.
16 is positioned below the hole 206 of the holder 204.
As a result, the next small C-shaped retaining ring 202 for the shaft is positioned on the plate 222. (7) Next, the chuck tip 88 holding the small shaft C-shaped retaining ring 202 is moved downward, and the pallet 106 is moved.
The end of the shaft 100 held by the jig 104 is inserted into the concave portion 98 of the chuck tip 88 so that the small C-shaped retaining ring 202 for the shaft corresponds to the groove 108 of the shaft 100. (8) Next, when the chuck guide block 76 is moved upward to bring the chucks 72 closer to each other, the small C-shaped retaining ring 202 for the shaft is reduced in diameter, and the small C-shaped retaining ring 2 for the shaft is reduced.
02 is inserted into the groove 108 of the shaft 100. (9) Thereafter, the cylinder rod 52 of the second air cylinder 50 is retracted, and the chuck tip 88 returns to the original position. Then, the pallet 106 is moved to position the next shaft 100 below the chuck tip 88.

Thereafter, by repeating the above steps (2) to (9), the small C-shaped retaining ring 202 for the shaft can be inserted into the groove 108 of the shaft 100 one after another. [Third Embodiment] A third embodiment of the C-shaped retaining ring insertion machine according to the present invention will be described with reference to FIGS. The same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The C-type snap ring inserter 300 of the present embodiment
A C-shaped retaining ring 302 for a hole as shown in FIG. 19 is used when inserting the groove into the hole.

As shown in FIGS. 20 to 23, the plate-like chuck bracket 3 is provided on the side of the third air cylinder 62.
04 are attached to face each other.

The guide shaft 71 is bridged near the lower end of the chuck bracket 304. A pair of chucks 30 slidably supported by the guide shaft 71 is provided between the chuck bracket 304 and the chuck bracket 304.
6 are arranged. Each of the chucks 306 has a tapered surface 306A formed on a side surface facing the chuck bracket 304.

The chuck 306 and the chuck bracket 30
4, a pair of tapered chuck guide blocks 308 that are narrower toward the bottom are arranged.
8 is connected to the third air cylinder 62 via the connecting plate 310.
Attached to the cylinder rod 80.

A stroke adjusting screw 312 is screwed into one chuck 306. Stroke adjusting screw 3
The tip of 12 protrudes toward the other opposing chuck 306, and the amount of movement of the chuck 306 is limited by abutting the tip against the side surface of the other chuck 306.

A spring 314 is inserted between the chucks 306, and presses the tapered surface 306 A of the chuck 306 against the tapered surface 308 A of the chuck guide block 308. Therefore, in the present embodiment, the chuck guide block 308
Move downward, the chucks 306 approach each other to compress the spring 314, and the chuck guide block 3
When 08 moves upward, the chucks 306 pressed by the spring 314 are separated from each other.

A chuck chip 316 is attached to the lower surface of each chuck 306.

The chucking chip 316 has a projection 316A which can be inserted into a hole for mounting the hole C-shaped retaining ring 302.
Are formed, and the pin 94 protrudes from the lower end of the protrusion 316A.

In the C-shaped retaining ring insertion machine 300 of the present embodiment, after the pin 94 is inserted into the small hole 318 of the C-shaped retaining ring 302 for a hole, the chucks 306 are moved closer to each other to insert the C-shaped retaining ring 302 for a hole. When the diameter is reduced and the C-shaped retaining ring for hole 302 is inserted into the hole 320 of the member 319 as shown in FIG. 23 and the chucks 306 are separated from each other, the C-shaped retaining ring for hole 302 can be inserted into the groove 322.

A pin inserted into the small hole 318 of the C-shaped retaining ring 302 is provided at the tip of a pliers-shaped dedicated tool used for mounting the C-shaped retaining ring 302 for a hole. When expanding and contracting the C-shaped retaining ring 302 for holes, the small holes 31
The outer peripheral surface of the pin rubs obliquely against the inner wall surface of 8. For this reason, there is a problem that the pin is apt to be unevenly worn, and there is also a problem that the pin is easily detached from the small hole 318 when the pin is unevenly worn. On the other hand, in the C-shaped retaining ring insertion machine 300 of the present embodiment, since the pair of pins 94 move linearly while remaining parallel to each other, the outer peripheral surface of the pin 94 hits the inner wall surface of the small hole 318 in parallel. The pin 94 is hard to wear and can withstand long-term use. [Fourth Embodiment] A fourth embodiment of the C-shaped retaining ring insertion machine according to the present invention will be described with reference to FIGS.

As shown in FIGS. 24 and 25, in this embodiment, the C-type snap ring inserter replenishes a handy type C-type snap ring insertion tool 500 and the C-type snap ring for shaft 38 one by one. And a replenishing machine 502.

The C-shaped retaining ring insertion tool 500 is
When 4 is pressed, compressed air flows in from the tube 510 connected to the cover plate 508 of the casing 506, and the piston (not shown) built in the casing 506 moves downward.

A top (not shown) having an inclined surface is attached to the tip of the piston. This top surface is in contact with two blocks (not shown) having chucks 512 connected to each other and having tapered opposing surfaces. A spring is provided outside the block to urge the block toward the approaching direction.

Accordingly, when the piston is pushed down by the compressed air, the chuck 512 is pushed outward by the wedge action of the top and the block, and the button 504 is pressed.
When the finger is released, the compressed air is discharged from the discharge port 414, and the blocks are pushed back in the direction of approaching each other by the urging force of the spring, so that the chuck 512 is narrowed.

Further, on the outer peripheral portion of the casing 506,
A guide portion 416 is provided to protrude along the length direction. The guide portion 416 engages with a guide groove 420 formed inside a guide wall 418 described later, and
The pin 422 protruding from the tip of the
Is inserted into the small hole 96.

On the other hand, the replenishing machine 502 has a base plate 422 placed on a workbench. This base plate 422
Has a wide groove 424 formed along the longitudinal direction, and a plate-like slider 426 is slidably mounted in the groove 424.

A stop wall 428 is provided upright at the center of the groove 424 so as to straddle the groove 424 to prevent the slider 426 from floating. Slider 426
A crank-shaped handle 430 is fixed to a rear end portion of the rear panel with screws. A guide hole is formed in the vertical surface 430A of the handle 430, and the guide hole is
A guide shaft 432 projecting in parallel to the groove bottom of the groove 424 extends through the groove.

A ring 434 is attached to the tip of the guide shaft 432. This ring 434
A spring 436 is disposed between the handle 430 and the handle 430 and is inserted into the guide shaft 432. As a result, the handle 430 is moved by the spring 436 to the stop wall 4.
28 side.

Further, on the stop wall 428, the bracket 4
38 are attached. This bracket 438 includes
A guide plate 442 is formed at the center of the width of the groove 424 and extends vertically. On this guide plate 442,
A substantially semi-cylindrical guide block 4 with an arc portion cut out
40 are mounted from both sides. Note that a small gap is formed between the lower surface of the guide block 440 and the slider 426, so that the slider 426 can reciprocate without hitting the guide block 440.

As described above, the outer dimensions of the loading portion 444 constituted by the guide plate 442 and the guide block 440 are slightly smaller than the inner dimensions of the C-shaped retaining ring 38 for the shaft. When the C-shaped retaining rings 38 for shafts loaded in step 1 are extracted one by one from the lowermost layer, the C-shaped retaining rings 38 for shafts in the upper layer are sequentially dropped by their own weight.

On the other hand, the upper surface of the tip of the slider 426
The circular convex portion, which is cut down by the thickness of the shaft C-shaped retaining ring 38 and into which the inner peripheral surface of the shaft C-shaped retaining ring 38 fits, and the gap 40 between the shaft C-shaped retaining ring 38 (FIG. 3 (B)) is formed.

Further, from both sides of the groove 424, the holding portion 44
Between 6, the guide wall 418 is raised. Inside the guide wall 418, a guide groove 420 extending in the vertical direction is formed. When the guide portion 416 protruding from the casing 506 of the C-shaped snap ring insertion tool 500 is engaged with the guide groove 420, the pin 422 protruding from the tip of the chuck 512 is engaged.
Is located at a position where it can be inserted into the small hole 96 of the C-shaped retaining ring for shaft 38 held by the holding portion 446.

On the other hand, at one end of the groove 424 in the longitudinal direction,
An end wall 450 is provided for abutting the rear end of the slider 426 to position the holding section 446 directly below the loading section 444. The other end of the end wall 450 contacts the tip of the slider 426 and holds the holding section 446 to the guide wall. An end wall 448 positioned between 418 is provided. (Operation) Next, the operation of the C-type snap ring inserter of the present embodiment will be described. (1) First, as shown in FIG. 26, a plurality of C-shaped retaining rings for a shaft are guided by using the upper end portion of the guide plate 442 (projected from the upper end surface of the guide block 440 and the corner portion is obliquely cut) as a guide. 38 is dropped into the loading section 444 from above. (2) As shown in FIG. 27, a finger is put on the handle 430, and the slider 426 is pulled toward the end wall 450. As a result, the holding portion 446 is located immediately below the loading portion 444, and the lowermost C-shaped snap ring 38 stacked on the loading portion 444 is placed on the holding portion 446. (3) Next, as shown in FIGS.
When the finger is released, the slider 426 slides toward the end wall 448 by the urging force of the spring 436, and
The C-shaped retaining ring 38 held at 46 is located between the guide walls 418. (4) Here, as shown in FIG. 24, the C-shaped snap ring insertion tool 500 is gripped with the pin 422 facing downward, and the guide groove 4
20 is engaged with the guide portion 416, and the pin 422 is
Push the retaining ring 38 into the small hole 96 until it is inserted. (5) Next, the button 504 of the C-shaped retaining ring insertion tool 500
When compressed, the compressed air flows into the casing 506, the chuck 512 is pushed and expanded, and as shown in FIG. 25, the C-shaped retaining ring 38 for the shaft is expanded, and the inner diameter is larger than the outer diameter of the mounted shaft. growing. When the C-shaped retaining ring for shaft 38 is mounted on the shaft and the button 504 of the C-shaped retaining ring insertion tool 500 is released, the chuck 512 is narrowed, and the C-shaped retaining ring for shaft 38 is removed.
Is reduced in diameter and attached to the shaft.

As described above, in this embodiment, the slider 42
By using the replenishing machine 502 which moves the 6 manually,
The overall manufacturing cost of the C-type snap ring insertion machine can be reduced. Fifth Embodiment A fifth embodiment of the C-type snap ring inserter according to the present invention will be described with reference to FIGS.

As shown in FIGS. 30 and 32, the C-shaped snap ring insertion tool 520 used in this embodiment has the same basic structure as that of the fourth embodiment, but the positioning guide means is not provided. It differs in that it is constituted by guide pins 522 projecting in parallel, and retainers 526 are respectively attached to chucks 524 that come and go with compressed air as power.

The guide pin 522 is connected to the replenishing machine 52 described later.
8 guide shaft 530 erected on the base plate 422
And the pin 532 protruding from the retainer 526 is inserted into the small hole 96 of the C-shaped retaining ring 38 for the shaft.

On the other hand, the basic structure of the replenishing machine 528 is also as follows.
This is the same as the fourth embodiment, but the loading portion 534 of the shaft C-shaped retaining ring 38 can load various sizes of the shaft C-shaped retaining ring 38, that is, the loading portion 534.
Has a mounting wall 536 erected so as to straddle a groove 424 formed in the center of the base plate 422. Two guide rods 538 extend in the up-down direction on the mounting wall 536. The small holes 96 of the C-shaped retaining ring 38 are held between the guide rods 538 from both sides. Has become. The slider 5 sliding along the lower end surface of the guide rod 538 and the groove 424
A slight gap is formed between the slider 540 and the upper surface of the slider 40 so that the slider 540 can reciprocate without hitting the guide rod 538.

The groove 424 faces the mounting wall 536.
An adjustment plate 542 is provided upright so as to straddle. The adjustment plate 542 has two holding rods 544 extending in the vertical direction. The holding rod 544 and the guide rod 5
38, the C-shaped retaining ring for shaft 38 is held from both sides.

Further, from the lower part of the adjusting plate 542, an adjusting bolt 545 protrudes downward. The adjusting bolt 545 is inserted into a long hole 546 formed on both sides of the groove 424, and is movable along the long hole 546.

That is, by moving the adjusting plate 542 and fixing the adjusting bolt 545 from below the base plate 422 with a nut, the loading portion 534 suitable for the size of the C-shaped retaining ring 38 for the shaft can be formed.

A handle 548 is provided upright from the upper surface of the slider 540. The handle 548 can be gripped to slide the slider 540 along the groove 424.

Further, the top surface of the tip of the slider 540 is cut down by the thickness of the C-shaped retaining ring 38 for the shaft.
A circular projection into which the inner peripheral surface of the shaft C-shaped retaining ring 38 fits, and a gap 40 between the shaft C-shaped retaining ring 38 (see FIG. 3B).
A holding portion 550 including a protruding portion into which the hole fits.

The holding portions 550 are provided on both sides of the groove 424.
In between, the guide shaft 530 is raised. The guide pin 522 of the C-shaped snap ring insertion tool 520 is engaged with the guide shaft 530.

On the other hand, as shown in FIG. 31, the retainer 526 attached to the C-shaped retaining ring insertion tool 520 is a block-shaped, concave portion 55 formed at the distal end of the chuck 524.
2 is provided with a convex portion 554 to be fitted. A counterbore 556 is formed in the projection 554, and a recess 55 is formed.
2, a screw hole (not shown) is formed. Then, the retainer 526 is attached to the chuck 524 by fastening the screw to the screw hole through the counterbore hole 556.

[0093] On the opposite surface of the retainer 526,
A semicircular concave portion 562 is formed, and an insertion hole through which the shaft 100 to which the C-shaped retaining ring for shaft 38 is attached is inserted when the two are overlapped is formed. From the periphery of the recess 562,
Each of the pins 532 is protrudingly provided.
Is inserted into the small hole 96 of the C-shaped retaining ring 38 for the shaft. (Operation) Next, the operation of the C-type snap ring inserter of the present embodiment will be described. (1) First, according to the size of the C-shaped retaining ring 38 for the shaft,
The adjustment plate 542 is moved to an appropriate position, and then the adjustment bolt 545 is fixed with a nut to change the size of the loading portion 534. From the top. (2) Hold the handle 548 and pull the slider 540 along the groove 424 in the direction opposite to the arrow A as shown in FIG. As a result, the holding portion 550 is located immediately below the loading portion 534, and the lowermost C-shaped snap ring 38 stacked on the loading portion 534 is placed on the holding portion 550. (3) Next, move the slider 540 in the direction of arrow A so that the end wall 5
When pushed back until it hits 64, the C-shaped retaining ring 38 held by the holding portion 550 is located between the guide shafts 530. (4) Here, the pin 53 projecting from the retainer 526
The C-shaped retaining ring insertion tool 520 is gripped with 2 facing downward, the guide pin 522 is engaged with the guide shaft 530, and the pin 532 is pushed in until it is inserted into the small hole 96 of the C-shaped retaining ring 38 for the shaft. (5) Next, the button 566 of the C-shaped retaining ring insertion tool 520
When the is pressed, the compressed air flows into the casing 568, the chuck 524 expands and the retainer 526 separates,
The diameter of the shaft C-shaped retaining ring 38 locked to the pin 532 is increased.

At this time, the surface of the shaft C-shaped retaining ring 38 is
Since it is in close contact with the periphery of the concave portion 562 formed in the retainer 526, it expands while maintaining a circular posture without being twisted when the diameter is expanded.

Then, as shown in FIG.
Is inserted into the shaft 100, the C-shaped retaining ring 38 for the shaft is mounted in the groove 108 of the shaft 100, and the button 566 of the C-shaped retaining ring insertion tool 520 is released.
Is reduced, and the C-shaped retaining ring 38 for the shaft is reduced in diameter, and is attached to the shaft 100.

As described above, in the present embodiment, the retainer 526
In any case, the diameter of the shaft C-shaped retaining ring 38 can be increased without twisting.

[0097]

As described above, the C-shaped retaining ring insertion machine according to the first aspect has the above-described structure, so that the C-shaped retaining ring insertion can be performed without damaging the outer peripheral surface of the shaft or the inner peripheral surface of the hole. The wheel can be easily inserted into the mounting groove and work efficiently.
It has an excellent effect.

Since the C-shaped retaining ring insertion machine according to the second aspect has the above-described configuration, if the C-shaped retaining ring is held by the C-shaped retaining ring holding portion, the C-shaped retaining ring is automatically inserted into the mounting groove. It has an excellent effect that the work can be more efficiently performed.

Since the C-shaped retaining ring insertion device according to the third aspect has the above-described configuration, the supply means can supply the loaded C-shaped retaining rings one by one to the C-shaped retaining ring holding portion, There is an excellent effect that work becomes more efficient as compared with a case where a C-shaped retaining ring is supplied manually.

[Brief description of the drawings]

FIG. 1 is a front view of a C-type snap ring insertion machine according to a first embodiment of the present invention.

FIG. 2 is a side view of the C-shaped snap ring insertion machine according to the first embodiment of the present invention.

FIG. 3A is a plan view of a C-shaped retaining ring insertion machine according to the first embodiment of the present invention, and FIG. 3B is a plan view of the C-shaped retaining ring.

FIG. 4 is a bottom view of the vicinity of the chuck chip viewed from below.

5A is a plan view of a slider in which a C-shaped retaining ring is positioned, and FIG. 5B is a cross-sectional view of the slider shown in FIG. 5A, taken along line 5 (B) -5 (B).

FIG. 6 is a side view showing a state where a C-shaped retaining ring inserted into a guide shaft is positioned in a groove of a slider.

FIG. 7 is a side view showing a state where the positioned C-shaped retaining ring is located below the chuck tip.

FIG. 8 is a side view showing a state in which a chuck tip abuts on a positioned C-shaped retaining ring.

FIG. 9 is a bottom view showing a state where the pin is engaged with a small hole of the C-shaped retaining ring.

FIG. 10 is a front view showing a state in which chuck tips holding a C-shaped retaining ring are separated from each other;

FIG. 11 is a bottom view showing a state in which chuck tips holding a C-shaped retaining ring are separated from each other.

FIG. 12 is a side view showing a state where a C-shaped retaining ring is inserted into a groove of the shaft.

FIG. 13 is a plan view of a C-shaped snap ring supply mechanism of a C-shaped snap ring insertion machine according to a second embodiment of the present invention.

FIG. 14 is a sectional view of a C-shaped retaining ring supply mechanism of the C-shaped retaining ring inserting machine shown in FIG. 13;

FIG. 15 is a sectional view taken along line 15-15 of FIG. 14;

FIG. 16 is a side view showing a state where a small C-shaped retaining ring inserted into a holder is positioned on a plate.

FIG. 17 is a side view showing a state in which a chuck tip abuts on a positioned small C-shaped retaining ring.

FIG. 18 is a sectional view taken along line 18-18 of FIG. 17;

FIG. 19 is a plan view of a C-shaped retaining ring for a hole.

FIG. 20 is a front sectional view of a main part of a C-shaped snap ring insertion machine according to a third embodiment of the present invention.

FIG. 21 is a sectional view taken along line 21-21 of FIG. 20;

FIG. 22 is a bottom view of a main part of the C-type snap ring inserting machine shown in FIG. 20;

FIG. 23 is a front sectional view of a C-shaped retaining ring insertion machine showing a state where a C-shaped retaining ring for a hole is inserted into the hole.

FIG. 24 is an overall perspective view of a C-shaped snap ring insertion machine according to a fourth embodiment of the present invention.

FIG. 25 is a perspective view showing a state in which the C-shaped retaining ring insertion tool of the C-shaped retaining ring inserting machine according to the fourth embodiment of the present invention expands the diameter of the C-shaped retaining ring.

FIG. 26 is a side sectional view showing an operation state of a replenishing machine of a C-shaped snap ring inserting machine according to a fourth embodiment of the present invention.

FIG. 27 is a side sectional view showing an operation state of a replenishing machine of a C-type snap ring inserting machine according to a fourth embodiment of the present invention.

FIG. 28 is a side sectional view showing an operation state of a replenishing machine of a C-shaped snap ring inserting machine according to a fourth embodiment of the present invention.

FIG. 29 is a side sectional view showing an operation state of a replenishing machine of a C-shaped snap ring inserting machine according to a fourth embodiment of the present invention.

FIG. 30 is an overall perspective view of a C-shaped snap ring insertion machine according to a fifth embodiment of the present invention.

FIG. 31 is a side view showing a state where a C-shaped retaining ring insertion tool of a C-shaped retaining ring inserting machine according to a fifth embodiment of the present invention expands the diameter of the C-shaped retaining ring.

FIG. 32 is a side sectional view showing a replenishing machine of a C-shaped snap ring inserting machine according to a fifth embodiment of the present invention.

FIG. 33 is a perspective view showing a state in which a C-shaped retaining ring is attached to a shaft with a C-shaped retaining ring insertion tool of a C-shaped retaining ring inserting machine according to a fifth embodiment of the present invention.

FIG. 34 is an explanatory diagram illustrating a state in which a C-shaped retaining ring for a shaft is mounted in a mounting groove of the shaft using a conventional jig.

FIG. 35 is an explanatory diagram illustrating a state in which a C-shaped retaining ring for a hole is mounted in a mounting groove of the hole using a conventional jig.

[Explanation of symbols]

 Reference Signs List 10 C-type retaining ring insertion machine 24 Slider (supply means) 26 Slider mounting plate (supply means) 28 First air cylinder (supply means) 34 L-shaped metal plate (supply means) 36 Guide shaft (supply means) 38 shaft C-shaped retaining ring for use 44 Stepped portion (C-shaped retaining ring holding portion) 50 Second air cylinder (moving means) 62 Third air cylinder (expanding / reducing means) 68 Chuck bracket (expanding / reducing means) 71 Guide shaft (expanding / reducing means) 72 Chuck (expansion and contraction means) 74 Bush (expansion and contraction means) 76 Chuck guide block (expansion and contraction means) 78 Bolt (expansion and contraction means) 82 Stroke adjusting screw (expansion and contraction means) 86 Spring (expansion and contraction means) 88 Tip for chuck (expansion and contraction means) 94 pin (Engaging means) 96 small hole (engaged part) 100 shaft (member to be mounted) 108 groove (groove for mounting) 200 C-shaped retaining ring insertion machine 202 C-shaped retaining ring for shaft 202C Notch (engaged portion) 216 Slide block (C-shaped retaining ring holding portion) 222 Plate (C-shaped retaining ring retaining portion) 300 C-shaped retaining ring insertion Machine 302 C-shaped retaining ring for hole 318 Small hole (engaged part) 319 Member (member to be mounted) 322 Groove (groove for mounting)

Claims (3)

[Claims] 1. A C-shaped retaining ring insertion machine for inserting a C-shaped retaining ring into a mounting groove of a member to be mounted, wherein the C-shaped retaining ring retainer retains the C-shaped retaining ring; A pair of engaging means for engaging engaged portions provided at both circumferential ends of the C-shaped retaining ring held by the wheel holding portion; and And C means for expanding and contracting the C-shaped retaining ring. 2. The method according to claim 1, wherein said pair of engagement means are driven to drive said C
2. The C-shaped retaining ring insertion according to claim 1, further comprising moving means for moving the retaining ring from the C-shaped retaining ring holding portion toward the mounting groove of the mounted member positioned at a predetermined position. Machine. 3. A supply means for loading a plurality of the C-shaped retaining rings and supplying the loaded C-shaped retaining rings one by one to the C-shaped retaining ring holding portion. Or the C-shaped retaining ring insertion machine according to claim 2.