JPH10156640A - Mounting method for clip and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount a clip automatically by inserting the clip from a circular column member into a guide passage, then displacing it in the guide passage, inserting it into a cylindrical member, and mounting it in a clip groove part of a piston under the displacement action of a mounting member. SOLUTION: When a cylinder 910 is energized, a pressing member 904 is displaced along a guide plate 898, and a clip 30 moves to a cylindrical member 884 side inside a guide passage 900. When a mounting member 882 lowers, a diameter of the clip 30 is reduced due to stress that the clip 30 receives from a wall face of a hole part 886, and the clip 30 is displaced horizontally and is engaged with a stepped part 892. When the mounting member 882 lowers furthermore and is inserted into a piston pin mounting hole 1010b of a piston 22 by a predetermined amount in this condition, the clip 30 is engaged with a clip groove part 1016b, its diameter is expanded, and it is mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for mounting a piston pin, and more particularly to, for example,
The present invention relates to a method and an apparatus for easily and surely mounting a clip in a clip groove defined in a wall forming a piston pin mounting hole in an assembling step of integrating a piston and a connecting rod.

[0002]

2. Description of the Related Art Conventionally, in an assembling process for integrating a piston and a connecting rod, first, a small end of the connecting rod is inserted into a concave portion defined in the piston, and a piston pin defined in the piston is inserted. The mounting hole and the piston mounting hole defined at the small end of the connecting rod are coaxially communicated, and then a piston pin is inserted into the piston pin mounting hole to connect the piston and the connecting rod, By attaching a clip to a clip groove defined in a wall forming a piston pin mounting hole, the piston pin is prevented from dropping off and integrated. At this time, the clip is manually attached to the clip groove.

[0003]

However, the above-mentioned conventional clip mounting method requires a dedicated worker having advanced technology, which raises the problem that the production cost rises and the working efficiency is greatly improved. Therefore, there is a disadvantage that mass production effect cannot be expected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and does not require any manpower, can reduce the production cost, and can improve the working efficiency. It is intended to provide the device.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to connecting a piston and a connecting rod by a piston pin and integrating them, and dropping the piston pin from the piston and the connecting rod. A method of attaching a clip for preventing, wherein one end of a cylindrical member is brought into contact with the piston, and an opening of the cylindrical member is coaxial with a piston pin mounting hole defined in the piston. Communicating with each other, reducing the diameter of the clip by a pressing member, and inserting the clip into the cylindrical member through a hole defined in a side portion of the cylindrical member while reducing the diameter of the clip. And a step of displacing the mounting member in the axial direction of the tubular member to mount the clip in a clip groove defined in a wall forming the piston pin mounting hole. , Characterized in that it engaged the piston pin into the piston and the connecting rod by the clip.

According to the method of the present invention, the clip is reduced in diameter by the pressing member and inserted into the cylindrical member, and the clip is mounted in the clip groove under the displacing action of the mounting member.

In this case, if the step of reducing the diameter of the clip is a step of reducing the diameter of the clip by displacing the clip to a guide passage gradually narrowing by the pressing member, the clip can be easily reduced. The diameter can be reduced and inserted into the tubular member, which is preferable.

In this case, in the step of inserting the clip into the inside of the tubular member, the clip is pressed against a slope formed at the tip of the mounting member so that the clip is pushed into the tubular member. It is preferable that the clip be reduced in diameter with respect to the axial direction because the clip having a reduced diameter can be easily held inside the tubular member.

Further, in this case, after the step of inserting the clip into the cylindrical member, the mounting member is displaced in the axial direction of the cylindrical member to form the clip on the peripheral edge of the mounting member. It is preferable that the step of engaging with the stepped portion includes the step of displacing the mounting member to easily hold the clip horizontally and mount the clip in the clip groove.

In this case, before the step of displacing the clip by the pressing member, a plurality of clips are mounted on a column member extending in the vertical direction, and the clip is swingably inserted into a gap between the clips. A step of inserting the provided guide member to position the clip in a predetermined direction; and displacing the pressing member to swing the guide member so that one of the plurality of clips attached to the columnar member is removed. Inserting the clip into the guide passage, the clip is positioned in a predetermined direction by the guide member, placed in the guide passage, and inserted into the cylindrical member in a predetermined direction. Is more preferable.

In this case, prior to the step of attaching the clip to the cylindrical member, placing one of the plurality of clips supplied from the parts feeder on the rail member, and placing the clip on the rail member. Transported by the arm member slidably provided on the rail member,
The step of attaching the clip to the cylindrical member is preferable because the clip can be continuously attached to the clip groove from a parts feeder.

The present invention also relates to a clip mounting device for connecting a piston and a connecting rod with a piston pin to integrate the piston and the connecting rod, thereby preventing the piston pin from dropping off the piston and the connecting rod. A tubular member provided coaxially with the piston pin mounting hole defined therein and holding a clip; and a guide passage fixed to a side portion of the tubular member and communicating with the inside of the tubular member. And a pressing member that is provided displaceably inside the guide passage and presses a clip, and a mounting member that is provided inside the cylindrical member so as to be displaceable in the axial direction thereof,
It is characterized by having.

According to the present invention, when the clip is placed on the guide passage and the pressing member is displaced, the clip slides inside the guide passage and is inserted into the tubular member. Next, when the mounting member is displaced, the clip is pressed by the mounting member and displaces inside the tubular member, and is mounted in a clip groove defined in a wall forming a piston pin mounting hole.

In this case, when the wall constituting the guide passage is formed so as to be gradually narrowed toward the cylindrical member, the pressing member displaces the inside of the guide member to displace the guide member. The clip is guided by the wall and gradually reduced in diameter,
The diameter of the clip can be easily reduced and inserted and held inside the tubular member, which is preferable.

In this case, when the mounting member is provided with a slope portion inclined at the distal end with respect to the direction of displacement, the clip is inserted into the tubular member, and the clip is inserted into the cylindrical portion. It is preferable that the clip, which is pressed against and is inclined with respect to the axial direction of the cylindrical member and whose diameter is reduced, can be easily held inside the cylindrical member.

Further, in this case, when a step is formed on the peripheral portion of the mounting member, the mounting member displaces inside the tubular member and the clip engages with the step. The clip is held, and the clip can be easily and securely mounted in the clip groove, which is preferable.

Further, in this case, a cylindrical member is provided above the guide passage, and a plurality of clips can be mounted thereon, and a guide is provided to be swingable on the cylindrical member, and a gap portion of the clip is inserted. When the pressing member is displaced and the guide member is displaced and one of the plurality of clips is introduced into the guide passage, the clip is positioned in a predetermined direction by the guide member and guided. It can be placed in the passage and inserted in a predetermined direction inside the tubular member, which is preferable.

Further, a guide plate extending along the axial direction of the cylindrical member and through which the gap of the clip is inserted is fixed inside the cylindrical member, while the guide plate is mounted on the mounting member. When a slit that can be inserted is formed, when the mounting member displaces the inside of the tubular member and moves the clip inside the tubular member, the gap between the clips is guided by the guide plate and is oriented in a predetermined direction. It can be mounted in a piston pin mounting hole, which is more preferable.

Further, a slider in which a hole through which a clip continuously supplied from a parts feeder is inserted is defined, and the hole is provided in the slider so as to be openable and closable, and the hole is closed. A shutter formed such that one of the plurality of clips fits into the hole, and a hole disposed below the slider and positioned above the columnar member are defined. A rail member, and an arm member that slides on the rail member and defines a hole communicating with the hole of the slider when the slider is displaced to a predetermined position, wherein the slider is displaced. Transporting the clip to a predetermined position, opening the shutter, inserting the clip into the hole of the arm member, displacing the arm member and attaching the clip to the columnar member,
The clip can be continuously attached to the piston from the parts feeder, which is preferable.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a clip mounting method according to the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, the clip mounting method and device are used in connection with a positioning jig, a work fixing device, a heating device, and a piston pin mounting device. Therefore, these devices are also described.

In FIG. 1, reference numeral 10 denotes a piston and connecting rod assembling apparatus in which the clip mounting apparatus according to the present embodiment is used. The assembling apparatus 10 includes a circular table 12, and surrounds the table 12 and positions a piston 22 and a connecting rod 24 with a positioning jig 26 and the piston 22 and a connecting rod 24 with the positioning jig 2.
A positioning mechanism comprising a work fixing device 14 fixed on the heating device 6, a heating device 16, and a piston pin mounting device 18
And the clip mounting device 20 are disposed so as to be deviated from each other by a predetermined angle with respect to the center of the table 12.

First, the table 12 will be described. The table 12 is configured to be rotatable in the direction of arrow A by a rotary drive source (not shown). On the upper portion of the table 12, a positioning jig 26 on which the piston 22 and the connecting rod 24 are placed is provided with the work fixing device 14, the heating device 1
6. Piston pin mounting device 18, clip mounting device 20
Are provided in correspondence with.

As shown in FIGS. 2 and 3, the positioning jig 26 provided on the table 12 is fixed to the upper portion of the table 12 and is disposed so as to have a substantially square shape. A plurality of holding members 102, and a first flange portion 1 protruding inward on an upper portion of the holding members 102.
04 is formed. Inside the holding member 102, a plate-like support member 106 is disposed so as to be slightly displaceable, and a plurality of studs 108 extending downward in the vicinity of the edge are fixed to the lower portion of the support member 106. And the stud 108
Is formed with a second flange portion 110. A coil spring 11 as an elastic member is provided below the stud 108.
2 are engaged with each other, and the lower end of the coil spring 112 contacts the upper surface of the table 12. Therefore, the support member 106 is urged upward by the coil spring 112 and is supported separately from the table 12. Note that the first flange portion 104 abuts on the support member 106 to restrict the support member 106 from being displaced upward.

As shown in FIG. 2, the support member 106 is provided with a piston support portion 114 and a connecting rod support portion 116. As shown in FIG. 3, the piston support portion 114 has a hole 118 defined in the support member 106.
Disk-shaped displacement member 1 fixed to the lower part of the wall forming the
20 and a curved surface 122 below the displacement member 120.
Is formed, and a stepped hole 124 communicating with the hole 118 is defined at the center of the displacement member 120. A table member 126 is provided on the table 12 below the displacement member 120, and legs 127 formed around the table member 126 are fixed to the table 12. A hole 128 is defined in the upper center of the base member 126, and an inclined surface 129 inclined toward the hole 128 is formed on the upper surface of the base member 126. The curved surface 122 slidably abuts on the inclined surface 129, so that the displacement member 120 is configured to be tiltable with respect to the base member 126.

A cylindrical cylinder 130 extends vertically and is fixed to the upper part of the support member 106, and the interior of the cylinder 130 is formed as a chamber 132. The room 132
Is connected to a compressed air supply source (not shown). A piston 136 is provided in the chamber 132 so as to be slidable back and forth.
An O-ring 138 for preventing leakage of compressed air is provided on the outer periphery of 36. A pin member 140 is provided on the upper portion of the piston 136 so as to extend in a vertical direction, and a reduced diameter portion 144 is formed on the upper portion of the pin member 140 via a step portion 142. A tapered portion 146 that gradually reduces the diameter is formed at the tip of the reduced diameter portion 144.

The pin member 14 is provided above the chamber 132.
The cylindrical member 150 into which the “0” is inserted is fitted, and the flange 152 formed on the upper part of the cylindrical member 150 is engaged with the upper part of the cylinder 130. A curved concave portion 156 is formed in an upper opening of the cylindrical member 150.
On 56 is mounted a cylindrical guide member 160 having a curved convex portion 158 that engages with it. The guide member 16
A step 162 is formed on the outer periphery of the cylindrical member 150.
The engagement of the fourth third flange portion 166 prevents the guide member 160 from falling off.

Cylinders 170a and 170b are fixed to the upper portion of the support member 106 on both sides of the cylinder 130 so that their axes extend in the vertical direction.
70a, 170b piston rods 172a, 172b
The shaft members 176a and 176b are fixed to the ends of the shaft members via mounting members 174a and 174b. The shaft member 176
a and 176b are provided with arm members 178a and 178b. In fact, the arm member 178a, 178b has a slot 18 therein.
0a, 180b are defined and the slots 180a, 180b
The shaft members 176a and 176b are inserted to be displaceable. A ring member 182 having a larger diameter than the shaft members 176a and 176b is provided at an end of the shaft members 176a and 176b.
a, 182b are fixed, and the ring members 182a, 18
The arm members 178a and 178b are prevented from coming off by 2b. The arm members 178a and 178b are formed with inclined portions 184a and 184b that are inclined downward.
One end portions of the holding members 188a and 188b are rotatably provided at 84a and 184b via shaft members 186a and 186b. The holding members 188a and 188b are bent at right angles, and the other ends of the holding members 188a and 188b have concave portions 190a defined on the outer periphery of the cylinder 130.
It is fixed to the wall of 190b. The arm members 178a, 1
78b are formed with gripping portions 192a and 192b extending upward and bent in a direction approaching each other.
Contact portions 194a and 194b are fixed to the ends of 2a and 192b. Therefore, the cylinders 170a, 170b
Is biased, the gripping portions 192a and 192b rotate around the shaft members 186a and 186b in a direction approaching or moving away from each other.

As shown in FIG. 2, the connecting rod supporting portion 116 has a plate-shaped member 200
A plurality of columnar members 202 are provided upright, and a base member 204 is supported above the columnar members 202. Plate-shaped wall members 208a, 208b are provided on the side of the base member 204.
Extend in the vertical direction and are fixed. The support member 106
On both sides of the base member 204, columnar members 210
a, 210b are erected and the cylinder 2
12a and 212b are fixed with their axes extending in the vertical direction. At the ends of the piston rods 214a, 214b of the cylinders 212a, 212b, mounting members 216a,
The shaft members 218a and 218b are fixed via 216b. The arm members 220 are attached to the shaft members 218a and 218b.
a, 220b are provided, and the arm members 220a, 220b are provided.
A part of b is rotatably provided on shaft members 226a and 226b provided above the columnar members 210a and 210b. The arm members 220a and 220b have grip portions 228 extending upward and bent in directions approaching each other.
a, 228b are formed, and the grip portions 228a, 228b
The contact portions 230a and 230b are fixed to the ends of. Therefore, when the cylinders 212a and 212b are urged, the grips 228a and 228b rotate in a direction to approach or separate from each other.

Next, the work fixing device 14 which constitutes a positioning mechanism together with the positioning jig 26 will be described. As shown in FIGS. 4 and 5, the work fixing device 14 includes a frame 3 erected close to the table 12.
The holding plate 302 is fixed to the upper part of the frame 300 so as to extend in the horizontal direction. A cylinder 304 is erected at the center of the holding plate 302 with its axis extending in the vertical direction.
Extends downward through a hole 308 defined in the holding plate 302. The holding plate 302 includes the cylinder 3
The tubular members 310a and 310b are erected on both sides of the tube 04. The lower portions of the tubular members 310a, 310b penetrate through holes 312a, 312b defined in the holding plate 302 and project downward, and flange portions 314a, 314b are formed on the outer periphery of the tubular members 310a, 310b. Is done. The flanges 314a and 314b are connected to the holes 312a and 31
The tubular members 310a and 310b are held by the holding plate 302 by being fixed to the upper portion of the wall forming the 2b. Ring members 316a to 316d are fitted to upper and lower portions of the tubular members 310a and 310b, and guide rods 320a and 320b are slidably disposed inside the tubular members 310a and 310b. Disk members 322a and 322b for retaining are fixed to the upper portions of the guide rods 320a and 320b, while the plate-like members 32 are fixed to the lower portions of the guide rods 320a and 320b.
A displacement plate 326 is fixed in parallel with the holding plate 302 via 4a and 324b. The lower end of the piston rod 306 is fixed to the center of the displacement plate 326. Therefore, when the cylinder 304 is urged, the displacement plate 326 is displaced vertically.

At the lower part of the displacement plate 326, a positioning pin 332 extends vertically and is fixed below the piston rod 306, and is fixed to the lower end of the positioning pin 332 in the axial direction of the positioning pin 332. Along the recess 33
4 are defined (see FIG. 5). An orbiting groove 336 is defined above the wall forming the recess 334, and a reduced diameter portion 144 formed at the tip of the pin member 140 of the positioning jig 26 with respect to the recess 334. It is configured to fit freely.

Next, the heating device 16 will be described.
As shown in FIGS. 6 and 7, the heating device 16 includes a frame 400 erected close to the table 12, and a holding plate 402 extends horizontally in an upper portion of the frame 400. It is fixed. A cylinder 404 is erected at the center of the holding plate 402 so as to extend its axis in the vertical direction, and a piston rod 406 of the cylinder 404 passes through a hole 408 defined in the holding plate 402. Extends down. A cylindrical member 410 is provided upright at one end of the holding plate 402 in parallel with the cylinder 404. The lower part of the cylindrical member 410 is inserted through a hole 412 defined in the holding plate 402 and protrudes downward, and
A flange 414 is formed on the outer periphery of the cylinder 0, and the flange 414 is fixed to a wall forming the hole 412, so that the cylindrical member 410 is held by the holding plate 402. Ring members 416a and 416b are fitted to the upper and lower portions of the cylindrical member 410, and a guide rod 420 is slidably disposed inside the ring members 416a and 416b. A disk member 422 for retaining is fixed to the upper part of the guide rod 420, while a displacement plate 426 is fixed to the lower part of the guide rod 420 in parallel with the holding plate 402 via a plate-shaped member 424. You. At the center of the displacement plate 426, the piston rod 40
When the lower end of the cylinder 6 is fixed and the cylinder 404 is urged, the displacement plate 426 is vertically displaced.

A cylindrical member 430 is fixed to the other end of the holding plate 402, and the inside of the cylindrical member 430 communicates with a hole 432 defined in the holding plate 402. A flange portion 434 protruding radially outward is formed at a lower portion of the cylindrical member 430, and the flange portion 434 is fixed to the holding plate 402. A cylindrical body 436 is fixed inside the cylindrical member 430, and a lower portion of the cylindrical body 436 is tapered to form a nozzle portion 438, and a distal end portion thereof opens as a jet port 440. The cylindrical body 436
Is provided with a heating element 442 such as a nichrome wire wound in a coil shape, and the heating element 442 is connected to a power supply device (not shown). A blower 444 is fixed to an upper portion of the cylindrical body 436, and the blower 444 forcibly sends air to the nozzle portion 438.

The nozzle plate 438 is provided on the displacement plate 426.
A cylindrical member 448 through which the cylindrical member 4 is inserted is fixed.
48 has a hole 446 defined in the displacement plate 426.
The nozzle portion 438 is slidably penetrated through the inside of the cylindrical member 448 and the hole portion 446, and the ejection port 440 of the nozzle portion 438 is configured to face downward from the hole portion 446. Have been. A box member 450 is fixed to the displacement plate 426.
When the box 4 is urged, the box member 450 is vertically displaced. A hole 452 communicating with the hole 446 is defined at an upper portion of the box member 450, and the nozzle 438 can be inserted through the hole 452. A lower portion of the box member 450 is opened, and a concave portion 454 through which a rod of a connecting rod 24 described later is inserted is defined in one wall portion.

Next, the piston pin mounting device 18 will be described. As shown in FIGS. 8 and 9, the piston pin mounting device 18 includes a piston pin supply mechanism 500, a piston pin transport mechanism 502, and a piston pin pressing mechanism 504.

The piston pin supply mechanism 500 is shown in FIG.
0, a frame 508 is provided.
A stocker 510 is provided at the upper part of 08. Inside the stocker 510, a side plate 512a inclined to the side surface thereof,
512b is provided, and a protrusion 514 protruding inward of the stocker 510 is fixed below one side plate 512b. An inclined guide plate 516 is disposed below the side plates 512a and 512b, and an opening 518 is formed in a gap between the guide plate 516 and the protrusion 514. A cylinder 520 is fixed to one end of the guide plate 516, and a piston rod 522 of the cylinder 520 is configured to be displaceable in parallel with the guide plate 516. A pressing member 524 is fixed to the piston rod 522, and the pressing member 524 can slide over the guide plate 516 and protrude from the gap between the other side plate 512a and the guide plate 516 into the inside of the stocker 510. It is. A stopper 528 is rotatably mounted on the lower portion of the guide plate 516 via a mounting member 526, and the stopper 528 is connected to the guide plate 516.
Can protrude into the stocker 510 from the hole 530 defined in the above. A linear cutout 532 is formed in the upper part of the stopper 528, while an arc-shaped bulge 534 is formed in the lower part of the stopper 528, and the bulge 53 is formed.
The end of the piston rod 538 of the cylinder 536 is rotatably mounted on the 4. An end of the cylinder 536 is fixed to a lower portion of the guide plate 516, and is rotatably mounted on a substantially L-shaped attachment member 540. The cylinder 536 and the stopper 528 are connected to the guide plate 516.
Is covered by a casing 542 fixed to the lower part of the. One end of a passage 548 is fixed to an end of the guide plate 516 via a holding member 546, and a proximity sensor 550 for detecting that a piston pin 28 described later has approached is provided at a substantially central portion of the passage 548. Can be

The piston pin transport mechanism 502 is shown in FIG.
As shown in FIG.
A substrate 562 extending toward the vicinity of the end of the passage 548 of the piston pin supply mechanism 500 is fixed to the frame 560. As shown in FIGS. 10 and 11, the substrate 562 is provided with a guide member 564 formed in a substantially cylindrical shape.
Numeral 6 is directed upward and has a tapered shape. A plate-like member 568 inclined on an extension of the passage 548 is fixed to the upper portion of the substrate 562 (see FIG. 8).
68 and the passage 548 are connected by a plate-shaped bent plate 570 (see FIG. 10). The plate-like member 568 has an inclined surface 572 that is inclined toward the hole 566 of the guide member 564. The side plate 5 is provided on the substrate 562.
74, and the side plate 574 is provided with the plate-shaped member 568.
Proximity sensor 576 is provided on the upper part of. The side plate 57
A piston rod 580 of a cylinder 578 is fixed to the upper part of the cylinder 578 so as to be displaceable in the horizontal direction.
A displacement plate 582 extending downward is fixed to zero. A pin member 584 is erected substantially at the center of the displacement plate 582,
The pin member 584 is engaged with the slide hole 588 of the cam plate 586. A lower portion of the cam plate 586 is formed to be thin, and a rotating plate 590 formed in a substantially crank shape is fixed to the cam plate 586, and an end of the rotating plate 590 is attached to the substrate 562. It is attached to a support member 592 fixed to the upper portion via a pin member 593.

The guide member 5 is provided on the frame 560.
A piston pin mounting table 594 formed in a substantially L shape is fixed below 64. A hole 596 is defined in the piston pin mounting table 594, and the proximity sensor 5 is formed in the hole 596.
98 are provided (see FIG. 10).

As shown in FIG. 12, a holding member 600 is fixed to the frame 560, and an arm member 604 is rotatably provided on the holding member 600 via a shaft member 602. A table 616 is provided above the frame 560.
Is fixed, and the cylinder 610 is fixed to the table 616. A piston rod 612 of the cylinder 610 projects through a hole 614 defined in the frame 560, and an end of the piston rod 612 is connected to a shaft member 608.
Is rotatably mounted on a protrusion 606 formed on the arm member 604 through a shaft. Accordingly, when the cylinder 610 is urged, the arm member 604 rotates around the shaft member 602 in the directions of arrows B and C. A grip 620 is provided at an end of the arm member 604, and the grip 620 includes a holding member 622 fixed to an end of the arm member 604. The holding member 622 has a bent contact. A surface 624 is formed. The holding member 622 has a hole 626.
Are horizontally extended, and one end of the hole 626 is closed by a cover member 628. A coil spring 636 is inserted into the hole 626, and one end of the coil spring 636 is seated on the lid member 628.

The end of the arm member 604 has a support member 63
7 is fixed, and a substantially L-shaped holding member 638 is rotatably mounted on the support member 637. The other end of the coil spring 636 is seated at one end of the holding member 638, so that the holding member 638 is urged in the direction of arrow D. A protrusion 642 is formed at one end of the holding member 638, and the protrusion 642 comes into contact with a stopper 644 provided on the frame 560 when the arm member 604 rotates in the direction of arrow B. The holding member 638 rotates in the direction of arrow E against the elastic force of the coil spring 636. A stopper 646 is provided at the other end of the holding member 638 to regulate the range of displacement of the holding member 638 in the direction of arrow D.

At the top of the frame 560, FIG.
As shown in FIG. 14, the piston pin pressing mechanism 504 is fixed above the arm member 604. The piston pin pressing mechanism 504 is fixed to an upper portion of the frame 560 and includes a substantially L-shaped support member 650. A plate member 652 is fixed to the upper portion of the support member 650.
A cylinder 654 is suspended from the plate-shaped member 652, and a piston rod 656 of the cylinder 654 is attached to the plate-shaped member 6.
52 protrudes downward through the hole 658 defined in the hole 52. As shown in FIG. 14, the plate-shaped member 652 has a cylindrical guide member 660 parallel to the axis of the cylinder 654.
a, 660b are erected, and the guide members 660a, 660
Guide rods 662a and 662b are slidably inserted into b. Flanges 664a and 664b are formed on the upper portions of the guide rods 662a and 662b, and the flanges 664a and 664b are connected to the guide members 660.
The guide rods 662a, 662b are prevented from dropping off by contacting the upper portions of the guide rods 660a, 660b.

A displacement plate 666 is fixed below the guide rods 662 a and 662 b and the piston rod 656 in parallel with the support member 650. Therefore, when the cylinder 654 is urged, the guide members 660a, 660a
While the guide rods 662a and 662b are guided by 60b, the displacement plate 666 is displaced vertically. A slide plate 668 is fixed to an end of the displacement plate 666 so as to extend in the vertical direction. An adjusting screw 672 is provided at a lower portion of the slide plate 668 via a mounting member 670, and an end of the adjusting screw 672 abuts on a lower surface of the displacement plate 666. Therefore, the position of the displacement plate 666 and the slide plate 668 is adjusted by rotating the adjusting screw 672 to change the length of the adjusting screw 672 protruding from the mounting member 670. The support member 650
A guide member 674 for guiding the slide plate 668 is fixed to the base plate. Further, a light-emitting unit 678 and a light-receiving unit 680 are disposed above the guide member 674 via mounting members 676 on both sides of the slide plate 668. You. The slide plate 6
A plate member 684 having a substantially U-shape is provided on the upper portion of the slide plate 68.
The upper end of 68 forms a slit 686. Therefore, the slide plate 668, the slit 686, the light emitting unit 6
78 and the light receiving unit 680 constitute a displacement detection sensor, and the slide plate 668 is displaced to
When the slit 686 is located in the gap between the light emitting portion 680 and the light receiving portion 680, the light emitted from the light emitting portion 678 is received by the light receiving portion 680, thereby detecting that the displacement plate 666 has been displaced by a predetermined amount. .

As shown in FIG. 13, a cylindrical nozzle portion 690 extends vertically and is fixed to the lower portion of the displacement plate 666, and a step portion 692 is provided at the tip of the nozzle portion 690. A nozzle body 693 that fits inside the piston pin 28 described later is formed. A passage 696 communicating with a hole 694 extending in the axial direction of the nozzle portion 690 is defined on a side portion of the nozzle portion 690, and a lubricating oil supply source (not shown) is connected to the passage 696. A plurality of holes 706 are defined at a lower portion of the nozzle portion 690 so as to be orthogonal to the axial direction of the nozzle portion 690 and extend outward in the radial direction, and the hole 706 is defined by a valve member 708. 694. The valve member 708 is configured to connect the hole 694 and the hole 706 when the pressure applied to the hole 694 increases.

As shown in FIG. 12, a cylinder 710 is fixed to the side of the frame 560 so as to extend in the horizontal direction.
, A cylinder 714 is fixedly extended in a direction perpendicular to the direction of displacement of the piston rod 712. The cylinder 7
A plate-shaped member 718 is fixed to the fourteen piston rods 716, and a hole 720 is defined in the plate-shaped member 718. The hole 720 is slidable in parallel with the displacement direction of the piston rod 716. A bar-shaped member 722 is provided. A flange portion 724 is formed at one end of the rod-shaped member 722,
Since the flange portion 724 is configured to be able to abut the plate-shaped member 718, the rod-shaped member 722 is prevented from falling off. The rod-shaped member 722 includes a coil spring 7
26 is provided so as to surround the rod-shaped member 722, and one end of the coil spring 726 is seated on the plate-shaped member 718. A mounting member 728 is attached to the other end of the rod-shaped member 722.
The other end of the coil spring 726 abuts on the mounting member 728,
Therefore, the temperature sensor 730 is constantly biased in the direction of arrow F. Next, the clip mounting device 20 of the present embodiment will be described. This clip mounting device 20
As shown in FIGS. 15 to 17, a frame 800 is provided,
The frame 800 extends horizontally to support members 80.
2 is fixed. The support member 802 includes a mounting member 804.
The rail member 806 is fixed via the
A hole 807 is defined near one end of 06. As shown in FIG. 18, a cylinder 808 is fixed to the other end of the rail member 806 at a lower portion of the rail member 806 and along the extending direction thereof. A slider 814 slidable on the upper part of the rail member 806 is fixed to a piston rod 810 of the cylinder 808 via a displacement member 812. The slider 814 includes a clip 30 described later.
A hole 816 through which a hole can be inserted is defined.
A cylindrical member 818 is disposed above the 16, and a substantially circular clip 30 is sequentially supplied from a parts feeder so as to surround the periphery of the cylindrical member 818. The hole 816
A guide plate 820 for restricting the direction of the clip 30 is fixed to a part of the wall portion forming the. The slider 8
A cylinder 822 whose axis is aligned with the longitudinal direction of the slider 814 is fixed to an upper portion of the cylinder 822.
A substantially L-shaped shutter 826 is fixed to the piston rod 824, and a slit 827 through which the guide plate 820 is inserted is defined in the shutter 826. Therefore, when the piston rod 824 is displaced, the hole 816 opens and closes. The upper surface of the shutter 826 is formed lower than the upper surface of the slider 814 by a height equal to the thickness of the clip 30. Therefore, when the hole 816 is closed by the shutter 826,
, Only one clip 30 is placed.

FIGS. 15 and 17 show the supporting member 802.
As shown in FIG. 5, a rotary drive source 830 such as a motor is fixed, and a bent transfer arm 832 is rotatably provided on the rotary drive source 830. As shown in FIG. 18, a slide member 836 having a hole 834 into which the clip 30 can be inserted is fixed to an end of the transfer arm 832, and the slide member 836 is formed in an arc shape. The upper part of the rail member 838 is slidable.

As shown in FIG. 19, a plate member 850 extending in the horizontal direction is fixed to the frame 800 via a support plate 849 extending in the vertical direction.
A cylinder 852 whose axis extends in the vertical direction is fixed to 50. The piston rod 854 of the cylinder 852 projects downward through a hole 856 defined in the plate-shaped member 850. A rail member 858 is fixed to the frame 800 so as to extend vertically below the plate-like member 850, and a sliding member 860a is attached to the rail member 858.
860b is slidably provided. The sliding member 860
Displacement members 862 are fixed to the upper and lower portions of the displacement members 862, 860b.
b is fixed. The piston rod 854 is connected to one of the horizontal plates 864a.
2 is biased, the displacement member 862
It is displaced vertically along 58. The horizontal plate 864a
A cylinder 870 is fixed so that the axis extends in the vertical direction, and a piston rod 872 of the cylinder 870 passes through a hole 874 defined in the horizontal plate 864a and protrudes below the horizontal plate 864a. ing. A cylindrical member 876 is fixed to the end of the piston rod 872, and a sliding member 878 is fixed to the cylindrical member 876. The sliding member 878 is provided to extend in the vertical direction to the displacement member 862. Slidably engaged with the rail member 880. A rod-shaped mounting member 88 is provided below the cylindrical member 876.
2, the mounting member 882 is attached to the horizontal plate 864b.
Is slidably inserted into a hole 886 of a cylindrical member 884 fixed to the cylindrical member 884. In the wall forming the hole 886, FIG.
As shown in FIG. 2, the guide plate 888 is fixed, while the mounting member 882 has a slit 890 into which the guide plate 888 is fitted. As shown in FIG. 19, a protrusion 894 is formed below the mounting member 882 via a step 892, and a slope 896 is formed at the tip of the protrusion 894.

As shown in FIG. 20, a guide plate 898 is fixed to the upper portion of the horizontal plate 864b, and a guide passage 900 is defined in the guide plate 898. The guide passage 900 communicates with a hole 886 of the tubular member 884. As shown in FIG. 23, the opposing walls 902a and 902b forming the guide passage 900 are formed so as to gradually narrow in width toward the cylindrical member 884. A substantially L-shaped pressing member 904 is slidably provided on the guide plate 898, and a curved concave portion 906 is defined at one end of the pressing member 904. At the other end of the pressing member 904, a piston rod 912 of a cylinder 910 fixed to the end of the horizontal plate 864b via a holding member 908 is fixed.
Accordingly, when the cylinder 910 is urged, the piston rod 912 extends, and the pressing member 904 slides on the guide plate 898 and is inserted into the guide passage 900.

On the guide plate 898, FIG.
As shown in FIG. 7, a plate-shaped member 914 is fixed, and a guide plate 916 is fixed to the plate-shaped member 914 so as to extend in the vertical direction. A cylindrical member 918 is fitted to the guide plate 916, and the upper part of the cylindrical member 918 is formed to have a tapered shape, and the end of the cylindrical member 918 is defined by the rail member 838. It is inserted into the hole 919. A slit 920 is defined at a lower portion of the cylindrical member 918,
A swinging plate 922 formed in a substantially fan shape is formed in the slit 920.
Are provided rotatably.

The piston and connecting rod assembling device 10 in which the clip mounting device according to the present embodiment is used is as follows.
Basically, it is configured as above,
The piston 22 and the connecting rod 24 used in the present embodiment will be described.

The piston 22 is formed in a substantially cylindrical shape as shown in FIG.
Are formed in a curved shape, and a skirt portion 1004 is formed at the other end. The piston 22 has a recess 1008 into which the connecting rod 24 is inserted along the axial direction thereof. Ring grooves 1006a to 1006c in which a piston ring (not shown) is mounted on the outer periphery of the piston 22.
Is formed, while the outer periphery of the piston 22 is provided with a recess 1.
009a, 1009b are defined and the recesses 1009a,
Piston pin mounting holes 1010a and 1010b communicate with the recess 1008 in a direction perpendicular to the axis of the piston 22 at the bottom of 1009b. A circular clip groove 1016 on which the clip 30 is mounted is formed in a wall forming the piston pin mounting holes 1010a and 1010b.
a, 1016b are defined.

A small end 1020 is formed at one end of the connecting rod 24 to be inserted into the concave portion 1008 of the piston 22, and a piston pin mounting hole 1022 through which the piston pin 28 is inserted is defined at the small end 1020. ing. A large end 1024 is formed at the other end of the connecting rod 24, and a connection hole 1032 through which a crankshaft (not shown) is inserted is formed at the large end 1024.

The piston pin mounting holes 1010a, 1010
The piston pins 28 mounted on the pistons 10b and 1022 are formed in a substantially cylindrical shape, and the center of the hole 1040 is formed with a reduced diameter via the step 1042.

The clip grooves 1016a and 1016b
As shown in FIG. 22, the clip 30 mounted on the clip 30 is formed in a substantially C-shape with a material such as an elastic metal, and therefore, the gap portion 1042 is defined in the clip 30.

The piston 22 and the connecting rod 24 used in the present embodiment are basically constructed as described above. Next, the operation of the assembling device 10 according to the present embodiment will be described. This will be described in relation to the method of attaching the clip.

First, the piston 22 and the connecting rod 24
The process in which the is mounted on the positioning jig 26 constituting the positioning mechanism will be described. In this case, as shown in FIG.
Is inserted into one of the clip grooves 1020.
A clip 30 is attached to 16a. Further, the piston 136 of the piston support portion 114 is lowered, and the tip of the pin member 140 is located inside the guide member 160. Further, the piston rods 172a, 172b of the cylinders 170a, 170b are retracted to hold the grip portions 192a,
192b are displaced away from each other (see FIG. 3). Similarly, in the connecting rod support portion 116, the grip portions 228a and 228b are displaced in a direction away from each other.

After the above preparatory steps, the piston 2
2 and the connecting rod 24 are placed on the positioning jig 26 manually or by a robot arm or the like. At this time, FIG.
As shown in FIG.
10a and 1010b are placed on the piston support portion 114 so as to extend in the vertical direction, and the upper portion of the guide member 160 fits into one of the recesses 1009a of the piston 22. The large end 1024 of the connecting rod 24 is placed on the connecting rod support 116.

Next, when a compressed air supply source (not shown) is energized, compressed air is introduced into the chamber 132 from the passage 134, and the piston 136 of the cylinder 130 is raised. For this reason, the pin member 140 is inserted in the order of one piston pin mounting hole 1010a of the piston 22, the piston pin mounting hole 1022 of the connecting rod 24, and the other piston pin mounting hole 1010b of the piston 22. Therefore, piston 2
2 and the connecting rod 24 are positioned with respect to the cylinder 130.

Next, the cylinders 170a and 170b and the cylinders 212a and 212b are urged to
As shown in FIG. 3, the gripping portions 2a and 192b and the gripping portions 228a and 228b are displaced in a direction approaching each other. The contact portions 230a and 230b are in contact with the upper end of the large end 1024. Thus, the piston 22 and the connecting rod 24
Is positioned and fixed to a positioning jig 26.

Next, a rotary drive source (not shown) of the table 12 is urged, and the piston 22 and the connecting rod 24 move together with the positioning jig 26 to the work fixing device 14 constituting a positioning mechanism. At this time, the piston rod 306 of the cylinder 304 of the work fixing device 14 is retracted, and the displacement plate 326 is at the raised position. When the positioning jig 26 moves below the displacement plate 326 as shown in FIG. 4, the cylinder 304 is urged to lower the displacement plate 326, and the concave portion 334 of the positioning pin 332 The reduced diameter portion 144 formed at the tip of the pin member 140 engages. Under the further displacement action of the piston rod 306 extending from the cylinder 304, the positioning pin 332 is further lowered, and the pin member 140 is pressed down. For this reason, the positioning pin 332 is connected to one of the piston pin mounting holes 101 of the piston 22 which is a work.
0b, a piston pin mounting hole 1022 of the connecting rod 24,
The other piston pin mounting hole 1010a of the piston 22 is inserted in this order. At this time, the piston pin mounting hole 101
If there is an error in the angles of 0a and 1010b with respect to the vertical direction, the piston pin mounting holes 1010a and
The wall forming 010 b is pressed against the outer periphery of the positioning pin 332. Therefore, the curved surface 122 of the displacement member 120
The piston 22 and the connecting rod 24 are positioned with respect to the positioning pin 332 by the sliding movement of the supporting member 106 with respect to the inclined surface 129 of the base member 126. Therefore, when the piston pin 28 is mounted in the piston pin mounting holes 1010a and 1010b in the subsequent steps,
Piston pin 28 and piston pin mounting holes 1010a, 1
There is no fear that an error occurs between the piston pin 28 and the piston pin 28 so that the piston pin 28 cannot be mounted.

Next, the piston 22 and the connecting rod 24
The step of heating and thermally expanding is described. First,
Piston rod 406 of cylinder 404 of heating device 16
Is contracted, and the displacement plate 426 is raised.

After the preparatory steps described above, the piston 22 and the connecting rod 24 positioned as described above are positioned.
Is transported below the displacement plate 426 constituting the heating device 16 by the rotation of the table 12. At this time, the piston pin mounting holes 1010a and 1010b and the piston pin mounting hole 1022 of the connecting rod 24 are coaxial with the nozzle portion 438 of the heating device 16, and the ejection port 440 of the nozzle portion 438 has the opening of one of the piston pin mounting holes 1010b. Suitable for clubs. Next, when the cylinder 404 is urged, the displacement plate 426 is lowered, and the box member 450 surrounds the piston 22.

Next, a power supply (not shown) is turned on,
When the heating element 442 is energized and the blower 444 is driven, air is forcibly sent into the cylindrical body 436, and the air is heated by the heating element 442. The air heated in this manner is blown from the ejection port 440 to the piston pin mounting hole 1010b. Therefore, the heated air flows from the piston pin mounting hole 1010b to the piston pin mounting hole 1022 of the connecting rod 24 and the piston 22.
The piston 22 and the small end 1020 of the connecting rod 24 are heated. Accordingly, the small ends 1020 of the piston 22 and the connecting rod 24 as the work thermally expand, and the respective piston pin mounting holes 1010a, 1010b and 1
022, the diameter of the piston pin 28 increases in the subsequent steps.
When mounting the piston pin, the piston pin 28 can be easily inserted into the piston pin mounting holes 1010a, 1010b, and 1022. At this time, the piston 22 is
, The diffusion of the heated air is suppressed, and the piston 22 and the small end 1020 of the connecting rod 24 can be efficiently heated.

Next, the step of mounting the piston pin 28 will be described.

The stocker 51 of the piston pin mounting device 18
0 has a large number of piston pins 28, as shown in FIG.
Is stored. The piston pin 28 has an opening 51
8 to a passage 548 sequentially, and is detected by the proximity sensor 550. However, a plurality of piston pins 28
May be bridged together inside the stocker 510 due to friction between each other, and may not be smoothly guided to the passage 548. In this case, there is no piston pin 28 detected by the proximity sensor 550, and when the cylinder 536 is urged to rotate the stopper 528, the notch 532 becomes parallel to the guide plate 516. At the same time, the cylinder 520 is urged, and the pressing member 524 protrudes from the gap between the guide plate 516 and the one side plate 512a into the stocker 510 to press the piston pin 28. For this reason, the plurality of piston pins 28 bridged inside the stocker 510 collapse and the piston pins 28 are led out from the passage 548.

On the other hand, since the end of the passage 548 is blocked by the cam plate 586 as shown in FIG. 10, the piston 28 is not led out to the end of the passage 548. At this time, the piston rod 612 of the cylinder 610 constituting the piston pin transfer mechanism 502 contracts, and FIG.
As indicated by a two-dot chain line in FIG. 2, the arm member 604 rotates in the direction of arrow B, and the protrusion 642 of the gripper 620 is moved to the stopper 644.
The holding member 638 rotates in the direction of the arrow E against the elastic force of the coil spring 636 to rotate the holding member 638.
The distance between the contact surface 645 and the contact surface 624 of the holding member 622 increases.

As shown in FIG. 11, when the cylinder 578 is urged and the piston rod 580 expands, the cam plate 5
86 rises and the piston pin 28 rolls to the end of the plate member 568. When the cylinder 578 is urged again and the piston rod 580 retracts, as shown in FIG. 25, the piston pin 28 is pressed by the displacement plate 582, and the piston pin 28 is moved from the inclined surface 572 to the tapered shape of the guide member 564. It is displaced vertically through the hole 566 and is mounted on the piston pin mounting table 594. At this time, the piston pin 28 contacts the contact surface 645 of the holding member 638.
And the contact surface 624 of the holding member 622.
At the same time, the pin member 584 slides on the wall forming the sliding hole 588 of the cam plate 586 under the displacement action of the cylinder 578, and the cam plate 586 rotates to close the passage 548. Therefore, the next piston pin 28 comes into contact with the cam plate 586 to stop the movement.

After the above preparation steps, the table 1
When the piston 2 and the connecting rod 24 heated as described above move to the piston pin mounting device 18, the cylinder 710 is urged to extend the piston rod 712, as shown in FIG. Cylinder 71
4 is energized, and the temperature sensor 730 contacts the end of the piston 22. Then, the temperature of the piston 22 is measured by the temperature sensor 730.

Next, as shown in FIG. 26, when the cylinder portion 654 of the piston pin pressing mechanism 504 is urged to lower the nozzle portion 690 under the displacement of the piston rod 656, the tip of the nozzle portion 690 becomes The piston pin mounting hole 1010b of the connecting rod 24, the piston pin mounting hole 1022 of the connecting rod 24, and the other piston pin mounting hole 1010a of the piston 22 are inserted in this order. When a lubricating oil supply source (not shown) is energized, the lubricating oil is supplied to the passage 696.
Through the hole 694, the hole 694 and the hole 706 communicate with each other under the operation of the valve member 708, and the lubricating oil is ejected from the hole 706 and the piston pin mounting holes 1010a and 1010b.
Is applied to the walls forming

Next, the energization of the lubricating oil supply source is stopped to end the application of the lubricating oil, and the cylinder 654 is energized to raise the nozzle portion 690. Then, the cylinder 610 of the piston pin transport mechanism 502 is urged, and the arm member 604 rotates in the direction of arrow C as shown in FIG. At this time, since the protrusion 642 is separated from the stopper 644, the holding member 638 rotates in the direction of arrow D, the contact surface 624 and the contact surface 645 approach each other, and the piston pin 28 is held. For this reason, as shown in FIG.
Is transported between the piston 22 and the nozzle part 690 under the rotation of the arm member 604.

Next, it is confirmed from the output signal of the temperature sensor 730 that the temperature of the piston 22 as a workpiece is higher than a predetermined temperature, and the cylinder 654 of the piston pin pressing mechanism 504 is urged again to lower the nozzle portion 690. Then, the reduced diameter portion 698 at the tip of the nozzle portion 690 is fitted into the hole of the piston pin 28. Under the further lowering action of the nozzle portion 690, the outer periphery of the piston pin 28 is
4 and 645, the piston pin 28 descends.
As shown in FIG. 8, one piston pin mounting hole 1010b of the piston 22, the piston pin mounting hole 1022 of the connecting rod 24, and the other piston pin mounting hole 1 of the piston 22
010a. The lower end of the piston pin 28 abuts on the clip 30 attached to the clip groove 1016a, and the lowering of the piston pin 28 stops. At this time, when the slide plate 668 is displaced with the lowering of the nozzle part 690 and the slit 686 reaches the gap between the light emitting part 678 and the light receiving part 680, light emitted from the light emitting part 678 is received by the light receiving part 680, It is detected that the part 690 has been lowered by a predetermined amount. If the light emitted from the light emitting unit 678 is momentarily received by the light receiving unit 680 and then stopped immediately, the clip 30 is not attached to the clip groove 1016a, and the piston pin 28 is further moved from a predetermined position. The piston 22 and the connecting rod 24 are determined to be displaced downward, and are removed from the manufacturing process.

The piston pin 28 is mounted on the piston 22 and the connecting rod 24 as described above.

Next, a process of attaching the clip 30 will be described.

First, as shown in FIGS. 17 and 18, the clip 30 is moved from a part feeder (not shown) to a cylindrical member 81.
The plurality of clips 30 are stacked and stored in the cylindrical member 818. The plurality of clips 3
0, the clip 3 located at the bottom of the cylindrical member 818
The guide plate 820 is inserted into the zero gap portion 1042, so that the clips 30 are arranged in a predetermined direction. When the cylinder 808 is urged, the slider 814 is displaced in the direction of arrow H, and only one of the clips 30 located at the lowermost position of the cylindrical member 818 is placed on the shutter 826. Displace. When the hole 816 of the slider 814 communicates with the hole 807 of the rail member 806, the cylinder 822 is urged and the shutter 826 is displaced, and the clip 30 drops from the holes 816 and 807 and the hole 834 of the transfer arm 832. Into the rail member 8
38.

Next, when the rotary drive source 830 is urged, the transport arm 832 rotates and the sliding member 836 is displaced on the rail member 838, and the clip 30 is moved to the cylindrical member as shown in FIG. 918. For this reason, the clip 30 drops from the hole 919 of the rail member 838 and accumulates around the cylindrical member 918. At this time, the guide plate 916 and the swing plate 922 are inserted through the gap 1042 of the clip 30, and the clips 30 are arranged in a predetermined direction. A plurality of clips 30 are stacked and stored in the cylindrical member 918, and the clip 30 located at the lowermost position among the clips 30 accumulated in the cylindrical member 918 in this way.
Is placed on the guide passage 900 as shown in FIG.

After the above preparation steps, the table 1
2 rotates to connect the piston 22 and the connecting rod 24 on which the piston pins 28 are mounted as described above to the cylindrical member 884.
Is transported below.

Next, when the cylinder 910 is biased, as shown in FIG.
The clip 30 is displaced in the direction of arrow J along the line 98 and presses the clip 30 by the wall forming the recess 906. Therefore, the clip 30 moves inside the guide passage 900 toward the tubular member 884. At this time, the clip 30 is deformed into an elliptical shape by the gradually narrowing wall portions 902a and 902b forming the guide passage 900. Then, the clip 30 enters the hole 886 of the cylindrical member 884 as shown in FIG. Here, the clip 30 comes into contact with the slope portion 896 of the mounting member 882, the approach direction is corrected downward, and the clip 30 is inclined inside the hole 886 which is set to have a slightly smaller diameter than the outer peripheral type of the clip 30. Inserted. The outer periphery of the clip 30 is pressed against the wall surface forming the hole 886 due to its elasticity, so that the clip 30 is inclined inside the hole 886 and held in an elliptical shape. At this time, the guide plate 888 is inserted through the gap of the clip 30, and the clip 30 is held in a predetermined direction.

Next, when the cylinder 852 is urged (see FIG. 19), the displacement member 862 is lowered, and the lower end of the cylindrical member 884 contacts the piston 22 as shown in FIG. At this time, the piston 22 and the connecting rod 24
Piston pin mounting holes 1010a, 1010b, 102
2 communicates coaxially with the hole 886 of the cylindrical member 884.

Next, when the cylinder 870 is urged (see FIG. 19), the mounting member 882 is lowered, and the projection 894 is inserted into the inner peripheral portion of the clip 30 (see FIG. 30). At this time, the portion located above the inclined clip 30 abuts on the step 892 of the mounting member 882, and further the mounting member 8
When the roller 82 descends, the clip 30 is reduced in diameter by the stress received from the wall surface of the hole 886 and is displaced substantially horizontally, so that the step 8
92. In this state, when the mounting member 882 further descends and is inserted by a predetermined amount into one of the piston pin mounting holes 1010b defined in the piston 22, the clip 30 engages with the clip groove 1016b, and the elasticity of the clip 30 increases. The mounting of the clip 30 is completed.

When the clip 30 is mounted in the clip groove portion 1016b of the piston pin mounting hole 1010b, the table 12 is rotated, and the piston 22 and the connecting rod 24 are moved to predetermined positions. Conveyed.

As described above, the piston pin 28 and the clip 30 are mounted on the piston 22 and the connecting rod 24.

Each time the table 12 is rotated by a predetermined angle, the work fixing device 14
2 and the connecting rod 24 are positioned, and the heating device 16
Accordingly, the piston 22 and the connecting rod 24 are heated, and the piston pin 28 and the clip 30 are mounted by the piston pin mounting device 18 and the clip mounting device 20. Therefore, the piston pin 2 is connected to the piston 22 and the connecting rod 24.
8 and the clip 30 can be mounted continuously.

[0081]

According to the clip mounting method and apparatus according to the present invention, the following effects and advantages can be obtained.

The clip supplied from the parts feeder is conveyed on the rail member by the arm member and mounted on the cylindrical member. After being inserted into the guide passage from the cylindrical member, the guide passage is displaced to the cylindrical member. The piston is inserted and attached to the clip groove of the piston under the displacement of the attachment member. This eliminates the need for a dedicated worker, which has conventionally been required for mounting clips, and can reduce production costs. In addition, the process for mounting clips can be completely automated, and work efficiency can be improved. It becomes possible to remarkably improve.

The diameter of the clip is reduced by a guide passage which gradually narrows, and the clip is pressed by a slope formed at the tip of the mounting member, and is inclined and inserted into and held by the tubular member.
Further, since the mounting member is displaced and engages with the step formed on the mounting member and its direction is displaced substantially horizontally, the clip can be easily mounted in the clip groove of the piston.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an assembling device in which a clip mounting device according to an embodiment of the present invention is used.

FIG. 2 is a schematic perspective view of a positioning jig used in the assembling apparatus of FIG.

FIG. 3 is a partial longitudinal sectional side view of the positioning jig of FIG. 2;

FIG. 4 is a schematic perspective view of a work fixing device used in the assembling device of FIG. 1;

FIG. 5 is a partial longitudinal sectional front view of the work fixing device of FIG. 4;

FIG. 6 is a schematic perspective view of a heating device used in the assembling device of FIG. 1;

FIG. 7 is a partial longitudinal sectional front view of the heating device of FIG. 6;

FIG. 8 is a schematic perspective view of a piston pin mounting device used in the assembling device of FIG. 1;

9 is a partially enlarged perspective view of the piston pin mounting device of FIG.

FIG. 10 is a longitudinal sectional view of a piston pin supply mechanism used in the mounting device of FIG.

11 is XI-XI of the piston pin supply mechanism of FIG.
It is a line sectional view.

FIG. 12 is a partially cutaway plan view of a piston pin transport mechanism used in the mounting device of FIG. 8;

FIG. 13 is a partial sectional side view of a piston pin pressing mechanism used in the mounting device of FIG. 8;

FIG. 14 is a partial vertical front view of the piston pin pressing mechanism of FIG. 13;

FIG. 15 is a partially omitted perspective view of the clip mounting device according to the embodiment of the present invention.

16 is a partially omitted perspective view of a mounting mechanism used in the clip mounting device of FIG.

FIG. 17 is a schematic plan view of the clip mounting device of FIG.

FIG. 18 is a partial longitudinal side view of the clip mounting device of FIG. 17;

19 is a partial vertical side view of a mounting mechanism used in the clip mounting device of FIG. 17;

FIG. 20 is a partially enlarged longitudinal sectional side view of the clip mounting device of FIG. 19;

FIG. 21 is a longitudinal sectional front view of a piston and a connecting rod assembled according to the embodiment of the present invention.

22 is a partially enlarged cross-sectional view of the clip mounting device shown in FIG.

FIG. 23 is a partially omitted cross-sectional view showing a guide passage of the clip mounting device shown in FIG. 19;

FIG. 24 is a partially omitted cross-sectional view showing a method of using the clip mounting device of FIG. 23, in a state where the clip is sliding in the guide passage.

FIG. 25 is a partial cross-sectional view showing a method of using the piston pin supply mechanism of FIG. 11, in which the piston pin is inserted through a guide member.

FIG. 26 is a partial vertical cross-sectional side view showing a method of using the piston pin pressing mechanism of FIG. 13, with a nozzle inserted into a piston pin mounting hole.

FIG. 27 is a partially longitudinal side view showing a method of using the piston pin pressing mechanism of FIG. 13, with a nozzle engaged with a piston pin.

FIG. 28 is a partial longitudinal sectional side view showing a method of using the piston pin pressing mechanism of FIG. 13, in a state where the piston pin is mounted in a piston pin mounting hole.

FIG. 29 is a partial vertical cross-sectional side view showing a method of using the clip mounting device of FIG. 20, in a state where the tubular member has descended and is in contact with a piston.

FIG. 30 is a partially longitudinal side view showing a method of using the clip attaching device of FIG. 20, in a state where the clip is attached to the clip groove portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Assembly device 12 ... Table 14 ... Work fixing device 16 ... Heating device 18 ... Piston pin mounting device 20 ... Clip mounting device 22 ... Piston 24 ... Connecting rod 26 ... Positioning jig 28 ... Piston pin 30 ... Clip 106 ... Support member 114: piston support 116: connecting rod support 120: displacement member 126: base member 140: pin member 228a, 228b
... Gripping part 332... Positioning pin 438. ... Transfer arm 882 ... Mounting member 884 ... Cylindrical member 900 ... Guide passage 902a, 902b ... Wall 1010a, 1010b ... Piston pin mounting hole 1016a, 1016b ... Clip groove

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Osamu Arai 8-1, Honcho, Wako-shi, Saitama Prefecture Honda Motor Co., Ltd. Wako Factory, Saitama Works (72) Inventor Takao Suzuki 8-1 Honcho, Wako-shi, Saitama Honda Motor Inside the Wako Factory of Saitama Manufacturing Co., Ltd.

Claims (13)

[Claims] 1. A method of connecting a piston and a connecting rod with a piston pin to integrate them, and mounting a clip for preventing the piston pin from dropping off from the piston and the connecting rod. A step of bringing one end portion into contact with the piston, coaxially communicating an opening of the tubular member with a piston pin mounting hole defined in the piston, and reducing the diameter of the clip by a pressing member; A step of inserting the clip with a reduced diameter into the cylindrical member through a hole defined in a side portion of the cylindrical member, and displacing the mounting member in an axial direction of the cylindrical member. Mounting the clip in a clip groove defined in a wall forming the piston pin mounting hole, and fixing the piston pin to the piston by the clip. And a method of mounting the clip, characterized by engaged to said connecting rod. 2. The clip mounting method according to claim 1, wherein the step of reducing the diameter of the clip includes the step of reducing the diameter of the clip by displacing the clip into a guide passage that is gradually narrowed by the pressing member. A clip mounting method, characterized in that: 3. The clip mounting method according to claim 1, wherein in the step of inserting the clip into the inside of the tubular member, the clip is pressed against a slope formed at a tip of the mounting member. Wherein the clip is inclined with respect to the axial direction of the tubular member. 4. The clip mounting method according to claim 1, wherein after the step of inserting the clip into the cylindrical member, the mounting member is moved in the axial direction of the cylindrical member. Wherein the clip is displaced to engage the step with a step formed on a peripheral edge of the mounting member. 5. The clip mounting method according to claim 1, wherein before the step of displacing the clip by the pressing member, a plurality of cylindrical members are provided extending vertically. Mounting the clip and positioning the clip in a predetermined direction by inserting a guide member swingably provided in a gap between the clips, and displacing the pressing member to move the guide member. Swinging and inserting one of a plurality of clips attached to the cylindrical member into the guide passage. 6. The clip mounting method according to claim 5, wherein one of a plurality of clips supplied from a parts feeder is mounted on a rail member before the step of mounting the clip on the cylindrical member. A method of transporting a clip placed on the rail member by an arm member slidably provided on the rail member, and attaching the clip to the column member. 7. A clip mounting device for connecting a piston and a connecting rod together by a piston pin to prevent the piston pin from dropping from the piston and the connecting rod, wherein the clip is defined by the piston. A tubular member provided coaxially with the piston pin mounting hole and holding a clip; a guide passage fixed to a side portion of the tubular member and communicating with the inside of the tubular member; A clip mounting device, comprising: a pressing member that is displaceably provided inside a passage and presses a clip; and a mounting member that is provided inside the cylindrical member so as to be displaceable in an axial direction thereof. 8. The clip mounting device according to claim 7, wherein a wall portion forming the guide passage is formed so as to be gradually narrowed toward the cylindrical member, and the pressing member is configured as the guide member. When the inside of the clip is displaced, the clip is guided by the wall and is gradually reduced in diameter. 9. The clip mounting device according to claim 7, wherein the mounting member is provided at its tip with a slope inclined with respect to a displacement direction, and the clip is inserted into the cylindrical member. Then, the clip is pressed by the slope portion, is inclined with respect to the axial direction of the tubular member, and is held inside the tubular member. 10. The clip mounting device according to claim 7, wherein the mounting member has a step formed on a peripheral portion thereof, and the mounting member displaces the inside of the cylindrical member. Then, the clip is engaged with and held by the step portion. 11. The clip mounting device according to claim 7, wherein the column member is disposed above the guide passage, and a plurality of clips can be mounted on the clip member. A guide member that is freely provided and through which a gap portion of the clip is inserted, wherein the guide member is displaced by the displacement of the pressing member, and one of the plurality of clips is introduced into the guide passage. A clip mounting device characterized by the above-mentioned. 12. The clip mounting apparatus according to claim 7, wherein the clip member extends inside the cylindrical member along an axial direction thereof,
A guide plate into which the gap of the clip is inserted is fixed,
On the other hand, the clip mounting device is characterized in that a slit through which the guide plate can be inserted is formed in the mounting member. 13. A clip mounting apparatus according to claim 7, wherein a slider having a hole through which a clip continuously supplied from a parts feeder is inserted is defined; A shutter provided so that the hole can be freely opened and closed, and a shutter formed such that one of the plurality of clips fits into the hole when the hole is closed; and a shutter disposed below the slider. A rail member having a hole defined above the columnar member, slidably provided on the rail member, and communicating with the hole of the slider when the slider is displaced to a predetermined position. An arm member having a hole defined therein, wherein the slider is displaced to convey the clip to a predetermined position, the shutter is opened and the clip is inserted into the hole of the arm member, Element Clip mounting apparatus characterized by by displacing be mounted clips into the cylindrical member.