JPH0639022B2 - Assembly device for rubber ring and hard ring and assembly method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to an assembly device and an assembly method for a rubber ring and a hard ring. In particular, the present invention relates to a method and an apparatus for assembling a rubber ring and a hard ring, in which the rubber ring and the hard ring can be accurately assembled at a high speed, and those which cannot be assembled in an accurate position can be checked.

(Prior Art) In the prior art relating to the present invention, there is an assembling apparatus for a rubber ring and a bush as shown in FIG.

This assembling apparatus is composed of a component mounting base 53 including a flat plate-shaped base 51 and a guide rod 52 mounted at a right angle on the flat surface of the base 51, and a pushing device 55 in which a hammer 54 is mounted at the tip of a hydraulic cylinder 56. There is. Then, when assembling the rubber ring 57 and the bush 58, the guide rod 52 of the component mounting base 53 is passed through the hole of the rubber ring 57, and then the bush 58 is passed through the two members so that the two members are stacked and pushed upward. The bushes 58 are pushed into the rubber ring 57 by the hammer 54 by utilizing the hydraulic cylinder 56 of the device 55 to be connected.

(Problems to be Solved by the Invention) In this assembling apparatus, the bush 58 must be inserted after the rubber ring 57 is inserted in the guide rod 52. Therefore, the assembled product is further assembled after the assembly. It is difficult to reduce the proportion of time in one of these loading and unloading steps, unless advanced robots are developed, as they have to be taken from the ground. Therefore, it has been impossible to improve the efficiency of the automatic assembly machine as mass production. Further, according to this assembly method, when the bush 58 is inserted into the inner peripheral surface of the rubber ring 57, the rubber ring 57 is necessarily deformed due to friction with the bush 58. Therefore, as shown in FIG. Is difficult to assemble in an accurate positional relationship. In particular, as the speed of fitting and assembling the two members is increased, the rubber ring is fitted and assembled with the rubber ring partially deformed. As a result, it is apparent that both members are assembled, but in reality, the rubber ring 57 and the bush 58 are often not connected to the normal position. Therefore, when the rubber bush 59 is assembled into the machine, there is a problem that the rubber bush 59 does not function, which has a great influence on the performance of the machine. Therefore, disassemble the machine on the market and reassemble it. It causes a huge loss of having to do it.

The present invention has been made in view of the problems as described above, and its technical problem is to enable a rubber ring and a hard ring to be effectively connected to a normal position, and at the same time to assemble at the same time as assembling. An object of the present invention is to obtain an assembling apparatus and an assembling method that enable selection of good products and defective products.

(Means for Solving Problems) The technical means of the present invention for solving the above-mentioned technical problems are configured as follows. That is, a first receiving member having an opening for inserting the rubber ring and having a hole for axially guiding the inserted rubber ring, and a cylinder arranged at the hole of the first receiving member at one end thereof A communication hole for supplying fluid to the cylinder is provided at the other end side, and a piston that fits into the cylinder and a tip fitting portion that fits into the inner peripheral surface of the rubber ring are provided on the opposite side of the piston. A rubber ring loader having a piston rod, a first reciprocating means for reciprocating the rubber ring loader, and a hard ring having a fluid communication hole therein and arranged at a position facing the rubber ring loader. Loader, a second receiving member that has a hole that guides the hard ring loader and also guides the hard ring, and an opening that guides the supplied hard ring to the hole; Second reciprocating means for reciprocating the loader for the ring, a fitting push-in portion at the tip of the loader for the hard ring that fits into the inner peripheral surface of the hard ring, and a communication hole for the fluid. An assembly device for a rubber ring and a hard ring, having an outlet of a communicating hole on the outer peripheral surface of the fitting and pushing portion. or,
While inserting the rubber ring into the hole from the opening of the first receiving member, insert the hard ring into the hole from the opening of the second receiving member,
While the rubber ring loader is moved forward, the rubber ring is fitted into the tip fitting portion of the piston rod to be conveyed, and while the hard ring loader is moved forward, the hard ring is fitted into the fitting push-in portion of the pusher. Transport
In the state where the rubber ring and the hard ring are press-fitted to each other, pressure fluid is pressurized from the hard ring side to the rubber ring, and the hard ring loader is slightly retracted at least once more and re-advanced again. How to assemble a rubber ring and a hard ring for press fitting.

(Operation) When the tip fitting portion of the rubber ring loader is advanced while being fitted into the inner peripheral surface of the rubber ring in the bottom row of the rubber rings aligned with the first shooter, the rubber ring is fitted into the tip. While being held at the joint, it is conveyed from the first shooter to the hard ring side. At the same time, when the fitting push-in portion of the hard ring loader is advanced into the inner circumferential surface of the hard ring in the bottom row of the hard rings arranged in the second shooter, the hard ring moves to the second shooter. Is conveyed so as to face the rubber ring. Then, the rubber ring and the hard ring are fitted together.

However, if the rubber ring and the hard ring are simply fitted together, the rubber ring is easily elastically deformed due to the friction associated with the fitting, and it is almost impossible to fit the rubber ring in a normal position. However, if pressure fluid is applied from the hard ring side to the inner peripheral surface side of the rubber ring as in the present invention at the time of fitting,
The elastically deformed portion of the rubber ring, which has been bent when the hard ring is press-fitted, is corrected to a normal state. But this fix is not perfect. Therefore, at the same time, when the hard ring loader is retreated a few times and the forward movement is repeated, even a small defect between the rubber ring and the hard ring can be completely corrected together with the action of the pressure fluid.

(Embodiment) FIG. 1 is a sectional view of an essential part of an assembly device for a rubber ring and a hard ring of the present invention in a state where both rings are fitted together. The rubber ring 2 is arranged in parallel with the first shooter 3 by a part feeder (not shown).

Further, the hard ring 4 is arranged in parallel with the second shooter 5 by a parts feeder (not shown).

The first shooter 3 and the second shooter 5 are formed by two members so that the passage size and the like can be adjusted so that the rubber and the hard rings 2 and 4 can move. Further, a first receiving member 6 is formed on the lower end of the first shooter 3 so that only the lowermost rubber ring 2 of the arranged rubber rings 2 is held.

The first receiving member 6 is held by a mounting base of the assembling apparatus, and is formed into a cylindrical shape, and the distal end side is radially slit and provided with a split portion 33 so as to perform a spring action in the outer diameter direction. Is formed in.

Further, an opening 7 is formed at the joint with the first shooter 3 so that the rubber ring 2 can be introduced. Further, a partition which is reciprocally moved by a solenoid so that the rubber ring 2 on the first shooter 3 side and the rubber ring 2 on the first receiving member 6 side can be separated from each other at a connection portion between the opening 7 and the first shooter 3. A plate 27 is provided. Then, the rubber ring loader 9 arranged in the inner peripheral surface of the first receiving member 6 has the tip of the piston rod 8 in the opening 7 so that the rubber ring 2 can be introduced into the first receiving member 6. It is arranged so that it does not protrude.

In this rubber ring loader 9, the piston of the piston rod 8 having the tip fitting portion 17 that fits with the inner peripheral surface of the rubber ring 2 is fitted into the cylinder 10 via the O-ring, and the piston rod 8 is compressed under fluid pressure. So that it can be reciprocated by
The communicating means 12 is provided with the communication hole 12 and the hose 13.

A rod of reciprocating means 14 is connected to the other end of the rubber ring loader 9 so that the rubber ring loader 9 can reciprocate. The reciprocating means 14 is an air or hydraulic cylinder, but may be a moving means for rotating a screw screw or the like.

Next, the hard ring loader 15 is provided with a pusher 16 which is engaged with the tip thereof, and a fitting push-in portion 18 which is fitted to the inner peripheral surface of the hard ring 4 is formed on the tip side of the pusher 16. Further, a through hole 19 is formed in the hard ring loader 15 in the axial direction, and a distribution hole 20 is formed in the pusher 16.
Is configured to communicate with. Further, like the rubber ring loader 9, the hard ring loader 15 is also connected to the rod of the reciprocating means 14 so as to be able to reciprocate. The distribution hole 20 provided in the pusher 16 has a plurality of jet ports radially formed along the axial direction so that the compressed fluid can be jetted from the peripheral surface of the fitting push-in portion 18. or,
The hard ring loader 15 has the same structure as the rubber ring loader 9 and is fitted to the second receiving member 21. The second receiving member 21 is configured similarly to the first receiving member 6, and is configured to receive the hard rings 4 from the second shooters 5 one by one. Further, the circulation hole 19 provided in the hard ring loader 15 is communicated with the check means 22 by a pipe 32. The checking means 22 is formed as shown in FIG.
If the rubber ring and the hard ring are fitted in the normal position, the pressure in the hole 20 of the pusher 16 rises.
The piston 34 adapted to correspond to the pressure of the check means 22 is pushed through the valve rod 23, and the valve rod 23 is pushed up to operate the limit switch 24, thereby transmitting the normality to the electric circuit, and the next loading is performed. It is configured to repeat. Incidentally, when the rubber ring 2 and the hard ring 4 are not fitted in a normal position, the pressure fluid leaks from the defective fitting surface, so that the pressure in the distribution hole 20 does not rise and the valve rod of the check means 22. 23 does not activate the limit switch 24. At this time, while the hard ring loader 15 repeats the re-press-fitting process, when the limit switch 24 does not operate for several seconds, the pneumatic cylinder 28 is operated by the electric timer and the shooter 29 is reversed to the receiving box on the defective product side. Allow the rubber and hard ring to be unloaded. Further, the hand 30 is constructed like tweezers with two hands sandwiching the rubber ring, and the two hands automatically move toward and away from the rubber ring 2 by the operation of the pneumatic cylinder. The rubber ring 2 is temporarily grasped in order to confirm whether the hard ring 4 is fitted and to remove the rubber ring 2 from both loaders 9 and 15.

FIG. 3 is a sectional view of a main part of an assembly device for a rubber ring and a hard ring, showing another embodiment of the present invention.

FIG. 3 is a sectional view showing a state in the middle of conveyance for fitting the rubber ring 2 and the hard ring 4 together. The difference from FIG. 1 is that a passage 25 is provided in the piston rod 8 and a valve 26 is attached to the passage 25. or,
The tip end side of the first receiving member 6 can be adjusted by the adjusting member 31. When the rubber ring loader 9 and the hard ring loader 15 are in the state shown in FIG. 1, the valve 26 is pressed by the tip portion of the pusher 16 to open, and the compressed fluid pressing the piston rod 8 is compressed. Are made to flow into the hard ring 4 side.

Next, the rubber ring loader 9 and the hard ring 15 are attached to the rubber ring 2 and the hard ring 4 by the following assembling method.
And fit exactly.

The rubber ring 2 is aligned with the first shooter 3 by a part feeder (not shown). Further, the hard ring 4 is aligned with the second shooter 5 by another part feeder. Then, the partition plate is opened by the operation of the solenoid, and the rubber ring 2 and the hard ring 4 are loaded on the first and second receiving members 6 and 21 one by one by the first and second shooters 3 and 5, respectively. Then, the rubber ring loader 9 operates to move forward, and if the distal end fitting portion 17 of the piston rod 8 is fitted into the rubber ring 2 and elastically stops with the inner peripheral surface having the slit of the first receiving member 6. For this purpose, the rubber ring 2 which is fitted and held for the purpose of being pushed is moved forward while preventing only the rubber ring 2 from jumping out and conveyed to a predetermined position. At the same time, the hard ring loader 15 operates to fit the fitting push-in portion 1 into the inner peripheral surface of the hard ring 4, and holds the second receiving member 21 and the hard ring 4 as in the case of the rubber ring 2. While moving forward, the hard ring 4 is fitted to the inner peripheral surface of the rubber ring 2. At this time, the piston rod 8 and pusher 16
While engaging with the concave and convex portions at the tip, the hard ring loader 15 repeats the operation of retracting and advancing by approximately the stroke step of the piston rod 8 together with the pitsoon rod 2 to 3 times, and the rubber ring 2 and the hard ring 4. It works to correct the defective connection state with. At the same time, an electromagnetic valve (not shown) is opened, and the pressure fluid passing through the flow hole 19 is jetted from the hole 20 to the inner peripheral surface side of the hard ring 4 to reach the inner peripheral surface of the rubber ring 2 and correct the abnormal deformation. To do. When the rubber ring 2 has a large viscoelasticity (for example, silicon rubber) and the rubber ring is in an abnormally fitted state, the pressure fluid flows out from that portion. You will not be able to push it up. As a result, since the limit switch 24 does not operate, the electric circuit of the assembling apparatus operates and the pneumatic cylinder 28 operates to invert the shooter 29 after a certain period of time has passed by the timer, and the rubber ring 2 and the hard ring 2 which have been permanently fitted are erroneously attached. The ring 4 is unloaded in a different direction to distinguish it from a normal product. Then, since the electric circuit of the electrical equipment operates, the rubber ring loader 9 and the hard ring loader 15 repeat the same normal operation as described above, and repeat the press-fitting work of the rubber ring 2 and the hard ring 4.

Then, if a defective product is generated in the fitting in this assembling work, the non-defective product and the defective product are selected by the above-described method.

(The invention's effect) . Since the rubber ring and the hard ring are loaded on the receiving members and are fitted to each other in an opposed state, and the fitted product is configured to start the next fitting process at the same time as falling, no wasteful work time is required. Then, a fitting hole of the pusher is provided with a distribution hole, and at the same time when the rubber ring loader and the hard ring loader are joined, the pressure fluid is jetted from the distribution hole of the fitting pressing part. The hard ring can be pressed in as it expands. As a result, it is possible to effectively prevent the rubber ring from being deformed such that the fitting surface is bent due to the fitting friction with the hard ring. In particular, since both ends of the rubber ring are sealed by the end faces of the rubber ring loader and the hard ring loader, pressure fluid flows into the inner peripheral surface of the joint between the rubber ring and the hard ring, and it is also effective for minute fitting defects. To fix.

． If there is a manufacturing variation in the width between the rubber ring and the hard ring, the pressure fluid will escape to the outside from the gap formed by the variation. ・ The variation of both parts can be detected, and defective products are eliminated. it can.

． When the rubber ring and the hard ring are fitted at a high speed, the rubber ring elastically deforms as if the joint surface was curled up due to the friction in relative fitting with the hard ring, so it is extremely difficult to fit them properly. However, like the assembling method of the present invention, the compressed air is ejected from the inner peripheral surface side of the hard ring to make the rubber ring in an expanded state, and the rubber ring loader and the hard ring loader are fed one or more times. It is recognized that when the rubber ring and the hard ring are press-fitted by the operation of the re-press-fitting step, the rubber ring and the hard ring are normally fitted with an extremely high probability. As a result, the effect of the assembling method can be expected in which the fitting failure is extremely reduced even if one cycle of the assembling apparatus is made high speed.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an assembly device for a rubber ring and a hard ring showing an embodiment of the present invention, FIG. 2 is a sectional view of a checking means of the present invention, and FIG. 3 is another embodiment of the present invention. Sectional views of the rubber ring loader and the hard ring loader of FIG. 4, FIG. 4 is a sectional view of a conventional rubber ring and bush assembly machine, and FIG. It is a figure. 2 ... Rubber ring, 3 ... First shooter, 4 ... Hard ring, 5 ... Second shooter, 6 ... First receiving member, 7
...... Aperture, 8 ...... Piston rod, 9 ・ ・ ・ Rubber ring loader, 10 ・ ・ ・ Cylinder, 11 ・ ・ ・ Movement means, 12
...... Communication hole, 13 ...... Hose, 14 ...... Reciprocating means, 1
5 ... Hard ring loader, 16 ... Pusher, 17 ...
... Tip fitting part, 18 ... Fitting pushing part, 19 ... Flow hole,
20 ... hole, 21 ... second receiving member, 22 ... checking means, 23 ... valve rod, 24 ... limit switch, 25
... passage, 26 ... valve, 27 ... partition plate, 28 ... pneumatic cylinder, 29 ... shooter, 30 ... hand, 31 ...
… Adjustment member, 32 …… Piping, 33 …… Split part, 34 …… Piston, 51 …… Pane, 52 …… Guide rod, 53 ……
Parts mount, 54 ... Hammer, 55 ... Pushing device, 5
6 ... Hydraulic cylinder, 57 ... Rubber ring, 58 ... Bush.

Claims (2)

[Claims] 1. A first receiving member (6) having an opening (7) for inserting a rubber ring and having a hole for axially guiding the inserted rubber ring, the first receiving member (6). Of the cylinder (1) having a cylinder (10) at one end and a communication hole (12) for supplying fluid to the cylinder (10) at the other end.
Rubber ring loader (9) including a piston rod (8) having a piston fitted to (0) and a tip fitting portion (17) fitted into the inner peripheral surface of the rubber ring on the opposite side of the piston. ,
A first reciprocating means (14) for reciprocating the rubber ring loader (9), and a fluid communication hole (19) arranged at a position facing the rubber ring loader (9). A second hard ring loader (15) having a hole for guiding the hard ring loader (15) and for guiding the hard ring, and having an opening for guiding the supplied hard ring into the hole. The receiving member (21), the second reciprocating means (14) for reciprocating the hard ring loader (15), and the tip of the hard ring loader (15) at the inner peripheral surface of the hard ring. A rubber ring having a fitting push-in portion (18) to be fitted into and a outlet having a distribution hole (20) communicating with the fluid communication hole (19) on the outer peripheral surface of the fitting push-in portion (18). Ring assembly device. 2. A rubber ring (2) is inserted into the hole from the opening (7) of the first receiving member (6), and a hard ring is inserted into the hole from the opening of the second receiving member (21). While moving the rubber ring loader (9) forward, attach the rubber ring (2) to the piston rod (8).
While being inserted into the tip fitting portion (17) of the above and being transported, the hard ring loader (15) is advanced while the hard ring is moved forward.
(4) is inserted into the fitting push-in portion (18) of the pusher (16) and conveyed, and the hard ring (4) is fitted with the rubber ring (2) and the hard ring (4) by press fitting. The rubber ring from the side
A method of assembling a rubber ring and a hard ring for press-fitting a fluid to the side (2) and re-pressing the hard ring loader (15) at least once a little and advancing it again.