JP3043285B2 - Piston pin mounting method and device - Google Patents

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 mounting a piston pin for easily and reliably mounting a piston pin in a piston pin mounting hole defined in the piston and the connecting rod in an assembling process for integrating the piston and the 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 pin 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 defining the piston pin mounting hole, the piston pin is prevented from dropping off and integrated. At this time, the piston pin is manually inserted into the piston pin mounting hole.

[0003]

However, the above-mentioned conventional method of mounting the piston pin requires a dedicated worker having a high level of skill, resulting in a problem that the production cost rises, and furthermore, the working efficiency is not so high. Does not improve
Therefore, there is a disadvantage that a mass production effect cannot be expected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and does not require any manpower, can reduce the production cost, and can improve the working efficiency. And an apparatus thereof.

[0005]

In order to achieve the above object, the present invention provides a method for mounting a piston pin for integrally connecting a piston and a connecting rod, wherein the method is defined by the piston and the connecting rod. Piston pin mounting hole
The step of coaxially positioning each other and before positioning
Heating the periphery of the serial piston pin mounting hole, heating of
Insert a cylindrical nozzle into the piston pin mounting hole ,
A step of applying to eject lubricating oil towards the wall portion forming the piston pin mounting hole from the nozzle, a step of Ru is temporarily disengaged said nozzle from said piston pin mounting hole, a piston in the piston pin mounting hole The method includes a step of transporting a pin and a step of displacing the nozzle again to press the piston pin, and mounting the piston pin in the piston pin mounting hole.

According to the present invention, since lubricating oil is applied to the piston pin mounting hole and then the piston pin is inserted, the piston pin can be easily and automatically mounted in the piston pin mounting hole. It is.

In this case, the piston pins are stored in the stocker and are continuously supplied from the stocker. A plurality of piston pins are bridged inside the stocker and are not supplied to the piston pin supply passage. When the pressing member is displaced toward the inside of the stocker to collapse the bridge and make the piston pin freely displaceable, the piston pin can be supplied to the passage again, which is preferable.

In this case, before the step of mounting the piston pin in the piston pin mounting hole, the temperature of the piston is measured by a temperature sensor, and when the temperature is equal to or higher than a predetermined temperature, the piston pin is connected to the nozzle by the nozzle. When the piston pin is mounted in the piston pin mounting hole, the piston can be mounted in a state where the piston thermally expands and the piston pin mounting hole is expanded in diameter, which is preferable.

The present invention also relates to a piston pin mounting device for integrally connecting a piston and a connecting rod, and a positioning jig for coaxially positioning piston pin mounting holes defined in the piston and the connecting rod. Utensils,
Heat around the positioned piston pin mounting hole
And can advance and retreat with respect to the piston pin mounting hole.
Heating means, a cylindrical nozzle which can be inserted into the piston pin mounting hole , driving means for displacing the nozzle in the axial direction thereof, and conveyance for conveying the piston pin and positioning it coaxially with the piston pin mounting hole. Positioning means, and the nozzle is inserted into the piston pin mounting hole, and lubricating oil is ejected and applied to a wall portion forming the piston pin mounting hole, and is temporarily applied from the piston pin mounting hole. After retreating, the piston pin is pressed and mounted in the piston pin mounting hole by displacing the nozzle again.

According to the present invention, first, the nozzle is inserted into the piston pin mounting hole defined in the piston, and lubricating oil is applied to the wall of the piston pin mounting hole. Next, when the piston pin is conveyed coaxially with the piston pin mounting hole and the nozzle is displaced, the piston pin is pressed by the nozzle and mounted in the piston pin mounting hole.

In this case, a passage communicating with the stocker and continuously supplied with a plurality of piston pins is provided at an end of the passage, and the passage is shut off to stop the subsequently supplied piston pin. A restricting means for releasing only one of the plurality of piston pins from a stopped state, a gripper for gripping the piston pin released by the restricting means, and the piston pin between the nozzle and the piston. And an arm member for transporting the piston pin, the piston pin can be automatically attached to the piston from the stocker, which is preferable.

Further, in this case, when the stocker is provided with a pressing member that can protrude into the stocker, when the plurality of piston pins are bridged inside the stocker and supply to the passage is stopped, It is preferable that the pressing member is displaced inside the stocker to break the bridge and supply the piston pin to the passage.

Further, in this case, the piston pin mounting device includes a temperature sensor that contacts the piston and measures the temperature of the piston, and displaces the nozzle when the temperature of the piston is equal to or higher than a predetermined temperature. When the piston pin is mounted in the piston pin mounting hole, the piston can be mounted in a state where the piston is thermally expanded and the piston pin mounting hole is enlarged in diameter.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a method for mounting a piston pin according to the present invention will be described below in detail with reference to the accompanying drawings. The piston pin mounting method and apparatus according to the present embodiment are used in connection with a positioning jig, a work fixing device, a heating device, and a clip 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 piston pin mounting apparatus according to the present embodiment is used. This assembling device 10
Is provided with a circular table 12, and surrounding the table 12, a positioning jig 26 for the piston 22 and the connecting rod 24.
A heating mechanism 16, a piston pin mounting device 18, and a clip mounting device 20; and a positioning mechanism including a work fixing device 14 for fixing the piston 22 and the connecting rod 24 on the positioning jig 26. Twelve centers are offset from each other by a predetermined angle.

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 an 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 portion 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-like member 200 on the supporting member 106.
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.

A positioning pin 332 extends vertically and is fixed below the piston rod 306 below the displacement plate 326, 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 displacement plate 426 is provided with the nozzle portion 438.
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 of this embodiment will be described. This piston pin mounting device 1
8 includes a piston pin supply mechanism 500, a piston pin transport mechanism 502, and a piston pin pressing mechanism 504, as shown in FIGS.

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 a sliding hole 588 of a cam plate 586 which is a restricting means for stopping the piston pin 28 supplied to the passage 548. The 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 formed on 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.

At the end of the arm member 604, a support member 63 is provided.
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 tip portion of the nozzle portion 690 is interposed via a step portion 692. 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 will be described. As shown in FIGS. 15 to 17, the clip mounting device 20 includes a frame 800, and a support member 802 extending in the horizontal direction is fixed to the frame 800. A rail member 806 is fixed to the support member 802 via a mounting member 804, and a hole 807 is defined near one end of the rail member 806. The rail member 8
As shown in FIG. 18, the other end of the cylinder 06 extends along the cylinder 8 along the lower part of the rail member 806 and the extending direction thereof.
08 is fixed. The rail member 80 is attached to a piston rod 810 of the cylinder 808 via a displacement member 812.
A slider 814 slidable on the upper part of the slider 6 is fixed. The slider 814 is formed with a hole 816 through which a clip 30 described later can be inserted, and a column member 818 is disposed above the hole 816 so as to surround the periphery of the column member 818. A substantially circular clip 30 is sequentially supplied from the parts feeder. A guide plate 820 for regulating the direction of the clip 30 is fixed to a part of the wall forming the hole 816. A cylinder 822 whose axis is aligned with the longitudinal direction of the slider 814 is fixed to an upper portion of the slider 814, and a substantially L-shaped shutter 826 is formed on a piston rod 824 of the cylinder 822.
The guide plate 820 is fixed to the shutter 826.
A slit 827 through which is inserted is defined. Therefore, when the piston rod 824 is displaced, the hole 816
Opens and closes. The upper surface of the shutter 826 is
When the hole 816 is closed by the shutter 826, only one clip 30 is placed on the shutter 826.

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 an 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.

Piston and connecting rod assembling apparatus 10 using piston pin mounting apparatus according to the present embodiment
Is basically configured as described above. Next, the piston 22 and the connecting rod 24 used in the present embodiment will be described. As shown in FIG. 21, the piston 22 is formed in a substantially columnar shape, a concave portion 1002 is formed at one end, and a skirt portion 1004 is formed at the other end. The piston 10 has a recess 10 into which a connecting rod 24 is inserted along its axial direction.
08 is defined. A ring groove 1006 in which a piston ring (not shown) is mounted on the outer periphery of the piston 22.
a to 1006c are defined, while recesses 1009a and 1009b are defined on the outer periphery of the piston 22, and the piston 22 is formed at the bottom of the recesses 1009a and 1009b.
Piston pin mounting hole 1010 in a direction orthogonal to the axis of
a and 1010b communicate with the recess 1008 and are defined. Revolving clip grooves 1016a and 1016b where the clip 30 is mounted are defined in the walls forming the piston pin mounting holes 1010a and 1010b.

At one end of the connecting rod 24, a small end 1020 inserted into the recess 1008 of the piston 22 is formed, 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 according to the present embodiment are basically constructed as described above. Next, regarding the operation of the assembling apparatus 10, the piston pin according to the present embodiment will be described. It will be described in relation to the mounting method of.

First, the piston 22 and the connecting rod 24
The step of positioning the positioning jig on the positioning jig 26 constituting the positioning mechanism will be described. In this case, as shown in FIG. 21, the small end 1020 of the connecting rod 24 is inserted in advance into the concave portion 1008 of the piston 22, and the clip 30 is mounted in one of the clip grooves 1016a. Also,
The piston 136 of the piston support 114 is lowered, and the tip of the pin member 140 is located inside the guide member 160. Further, the piston rods 172a and 172b of the cylinders 170a and 170b are retracted to
2a and 192b are displaced away from each other (see FIG. 3). Similarly, with respect to the connecting rod support portion 116, the grip portions 228a and 228b are displaced away from each other.

After the above preparation 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 from the passage 134 into the chamber 132, 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 on the 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 toward 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 and fixed 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, the piston pin 28 and the piston pin mounting hole 1010
There is no concern that an error may occur between the piston pins 28a and 1010b and 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 set.
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 transport mechanism 502 contracts,
As shown by a two-dot chain line in FIG.
The protrusion 642 of the grip 620 is rotated in the
44, and the holding member 636 is connected to the coil spring 63.
6 in the direction of arrow E against the elastic force of
The distance between the contact surface 645 of the holding member 622 and the contact surface 624 of the holding member 622 increases.

As shown in FIG. 11, when the cylinder 578 is urged to extend the piston rod 580, 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 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, the cylinder 654 is energized, and the nozzle 690 rises. 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 brought into contact with the contact surface 62.
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 rotation drive source 830 is urged, the transfer 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 urged, 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 descends, 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 protrusion 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 assembling apparatus 10 causes the work 2
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.

[0075]

According to the method and the apparatus for mounting a piston pin according to the present invention, the following effects and advantages can be obtained.

A plurality of piston pins are supplied to the passage from the stocker, and one of the plurality of piston pins is gripped by the arm member by the regulating means, and the piston member is conveyed by the arm member to displace the nozzle portion. It is automatically installed in the piston pin mounting hole of the piston and connecting rod below. This eliminates the need for a dedicated worker, which was conventionally required for assembling the piston and the connecting rod together.This reduces production costs and completely automates the process of mounting the piston pin. Work efficiency can be significantly improved.

Further, when the piston pin is bridged inside the stocker, the pressing member is displaced to break the bridge, and the piston pin is displaceably supplied to the passage so that the supply of the piston pin is stopped. There is no concern that work will be interrupted.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an assembling device in which a piston pin 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 positioning device used in the assembling device of FIG. 1;

FIG. 5 is a front view, partially in vertical section, of the positioning 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 according to the embodiment of the present invention.

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 a clip mounting device used in the mounting device of FIG. 1;

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 Kenichi Fujita 8-1 Honcho, Wako-shi, Saitama Honda Motor Co., Ltd. Wako Factory, Saitama Manufacturing Co., Ltd. (72) Osamu Arai 8-1 Honcho, Wako-shi, Saitama Honda Motor (56) References JP-A-4-275832 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23P 21/00 303 B23P 19/02

Claims (7)

(57) [Claims] 1. A piston and connecting rod to a method for mounting a piston pin for integrally connecting, the step of positioning the piston and piston pin mounting holes with each other which is defined in the connecting rod coaxially, is positioned Heated around the piston pin mounting hole
That a step, a step of inserting a tubular nozzle to the heated said piston pin mounting hole, applied by jetting a lubricating oil toward the wall portion forming the piston pin mounting hole from the nozzle, the nozzle Temporarily disengaging the piston pin from the piston pin mounting hole; transporting the piston pin to the piston pin mounting hole; displacing the nozzle again to press the piston pin; Mounting the piston pin in the piston pin mounting hole. 2. The piston pin mounting method according to claim 1, wherein the piston pins are stored in a stocker and continuously supplied from the stocker, and a plurality of piston pins are bridged inside the stocker. When the piston pin is no longer supplied to the piston pin supply passage, the pressing member is displaced toward the inside of the stocker to break the bridge, displace the piston pin, and supply the piston pin to the passage. A method for mounting a piston pin, characterized in that: 3. The method for mounting a piston pin according to claim 1, wherein the temperature of the piston is measured by a temperature sensor before the step of mounting the piston pin in the piston pin mounting hole, and the temperature is equal to or higher than a predetermined temperature. Wherein the piston pin is mounted in the piston pin mounting hole with the nozzle at the time of. 4. The piston and connecting rod to a mounting device of the piston pin for integrally connecting, a positioning jig for positioning the piston and connecting rod in the field made the piston pin mounting holes with each other coaxially, positioning Heated around the piston pin mounting hole
And can advance and retreat with respect to the piston pin mounting hole.
Heating means, a cylindrical nozzle which can be inserted into the piston pin mounting hole , driving means for displacing the nozzle in the axial direction thereof, and conveyance for conveying the piston pin and positioning it coaxially with the piston pin mounting hole. And positioning means, wherein the nozzle is inserted into the piston pin mounting hole, and lubricating oil is ejected to a wall portion forming the piston pin mounting hole.
And by applying, once the piston after the pin was retracted from the mounting hole, a piston pin mounting apparatus characterized by pressing mounting the piston pin to the piston pin mounting hole by again displacing the nozzle. 5. The piston pin mounting device according to claim 4, wherein a passage communicating with the stocker and to which a plurality of piston pins are continuously supplied is provided at an end of the passage, and the passage is cut off. Regulating means for stopping the subsequently supplied piston pin and releasing only one of the plurality of piston pins from a stopped state; a gripper for gripping the piston pin released by the regulating means; and the nozzle And an arm member for transporting the piston pin between the piston and the piston. 6. The piston pin mounting device according to claim 5, wherein the stocker includes a pressing member that can protrude inside the stocker, and a plurality of the piston pins are bridged inside the stocker and supplied to the passage. When it is no longer
A piston pin mounting device, wherein the pressing member is displaced inside the stocker to break the bridge, displace the piston pin, and supply the piston pin to the passage. 7. The piston pin mounting device according to claim 4, wherein the piston pin mounting device includes a temperature sensor that contacts the piston and measures a temperature of the piston. A piston pin mounting apparatus, wherein the piston pin is mounted in a piston pin mounting hole by displacing the nozzle when the temperature of the piston is equal to or higher than a predetermined temperature.