JPS5818173B2 - Composite parts assembly equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes, for example, a resin molded product as a resin chassis, a rotating shaft press-fitted into a through hole provided in the resin molded product,
A rotary body, such as a rope hook or an eye gear, is inserted into the rotary shaft, and an E-ring or snap washer, for example, is fitted into a groove provided at the tip of the rotary shaft to prevent the rotary body from being removed. The removal is related to a device for assembling a composite part consisting of a stopper, and its purpose is to remove the tip of the rotating shaft that is press-fitted into the resin molded product, the top surface of the rotating body that is inserted into this rotating shaft, and the like. The rotating shaft is inserted into the rotating shaft by fitting the rotating shaft into the resin molded product and fitting the rotating body into the rotating shaft so that the dimension between them is always kept constant. The purpose of the present invention is to enable the rotary body to be mounted on the rotary shaft without significant rattling in the thrust direction, regardless of variations in dimensional errors during the production of the body.

Generally, this type of composite part is manufactured by press-fitting a rotating shaft 2 into a through hole (not shown) provided in a resin molded product 1, as shown in FIG. The rotating body 3 with a thickness of H is inserted into the rotating shaft 2, with the dimension between the tip and the tip set to a certain target value, and the dimension t left at the tip of the rotating shaft 2 is
By fitting the removal stopper 4 into a groove (not shown) provided in the part, the rotating body 3 is rotatably supported on the rotating shaft 2 implanted in the resin molded product 1. Ta.

However, in the assembly method described above, the resin molded product 1
Although it is possible to eliminate the variation in the dimensions from the tip of the rotating shaft 2 implanted in the rotary shaft 2 to the top surface of the resin molded product 1 to a certain target value, There is a dimensional error in the thickness H at the time of creation, and there is also a dimensional error from the tip of the concave groove formed at the tip of the rotating shaft 2. Therefore, a certain target value for the resin molded product 1 A rotary body 3 is attached to a rotary shaft 2 installed at the dimension of the value.
If a groove is inserted into the rotary shaft 2, the vibration in the thrust direction may increase due to the dimensional error of the groove formed in the rotary shaft 2 and the dimensional error of the rotary body 3. There was a drawback that the stopper 4 could not be fitted when removed.

In other words, there is a dimensional error of ±0.2'H11 in the thickness H of the rotating body 3, and there is a dimensional error of ±0.2'H11 in the groove forming location (dimension t) of the rotating shaft 2.
If there is a dimensional error of 1M, the rotating shaft 2 may not be press-fitted into the resin molded product 1 to the target length.
It is not possible to absorb the dimensional error in the thickness H, which causes backlash in the thrust direction.

In order to improve the inconvenience caused by the dimensional error of the rotating body 3 and the rotating shaft 2, the dimensional error of the thickness H of the rotating body 3 is minimized at the time of creation, so that the dimensional error after insertion into the rotating shaft 2 is reduced. It is conceivable to minimize the variation in the dimension t between the upper surface of the rotating body 3 and the tip of the rotating shaft 2.

However, with this improvement measure, (a) although it is possible to eliminate variations in the dimensions of the rotating shaft 2 press-fitted into the resin molded product 1 with respect to a certain target value, the rotating body 3 inserted into the rotating shaft 2 Since a dimensional error always occurs in the thickness H of the rotating body 3 when it is produced, the dimensional error of the rotating body 3 is taken into account in the dimension t from the upper surface of the rotating body 3 to the tip of the rotating shaft 2, inevitably causing variations.

(b) Furthermore, when the number of rotating bodies 3 inserted into the rotating shaft 2 is a plurality of combinations of two or more, the dimensional error in the thickness H of the rotating bodies 3 becomes even larger, and the The variation in the dimension t becomes even larger.

Due to these disadvantages, it has been difficult to support the rotating body 3 while minimizing rattling in the thrust direction with respect to the rotating shaft 2.

The present invention solves these conventional drawbacks,
DESCRIPTION OF THE PREFERRED EMBODIMENTS The composite parts assembly apparatus of the present invention will be described below with reference to drawings of embodiments.

2 to 6 show an example of the configuration of a composite parts assembly apparatus according to the present invention. In the figures, 11 is a base machine, 12 is a placement unit installed on the base machine 11, and the inside The machine has a drive mechanism 15 to which the power of a drive shaft 13 attached to the base machine 11 is transmitted via a gear 14 provided at its tip.

Reference numeral 16 denotes a chucking unit attached to the placement unit 11, which connects the rotating body 3 to the resin molded product 1.
A semi-finished product consisting of a rotary shaft 2 and a rotating shaft 2 temporarily press-fitted therein is transferred.

The chucking unit 16 includes a cam 17 driven by a drive mechanism 15 provided in the placement unit 11, a lever 18 rotatably supported to swing in contact with the outer circumference of the cam 17, and a lever 18 that is rotatably supported to swing in contact with the outer circumference of the cam 17. A connecting rod 19 that is coupled to one end of the lever 18 and reciprocated in the direction of arrow A in the figure, a receiving member 20 that pivotally supports the connecting rod 19, and a receiving member 20 that is suspended between the receiving member 20 and the lever 18 to support the lever. 18 against the outer periphery of the cam 17, and a jig 22 for gripping the rotating body connected to the other end of the connecting rod 19.

23 is a press fitting unit for the rotating body 3 and rotating shaft 2 attached to the placement unit 11, and the rotating body 3 transferred by the chucking unit 16 is temporarily press-fitted into the resin molded product 1 as a semi-finished product. It is inserted into the shaft 2.

This press-fit unit 23 is the placement unit 1
A lever 24 that is reciprocated in the direction of arrow B in the figure through a cam (not shown) driven by a drive mechanism 15 provided in 1; The sleeve 27 is provided to cover the outer periphery of the pilot 25 and is reciprocated in the direction of arrow C in the figure by the driving force of the press-fitting air cylinder 26, and a receiving member 28 that supports the sleeve 27. It is something that will be done.

The pilot 25 has an inner ring 29 that is slidable within an axial hole 27a of the sleeve 27, and is coupled to the inner ring 29 and is inserted into another axial hole 27b of the sleeve 27. a slidable shaft 30 and the inner ring 2
a spring 31 that is inside the inner ring 29 and biases the shaft 30; and a spring 31 that is inside the inner ring 29 and biases the shaft 30; , is provided with an engaging element 32 that comes into contact with the stepped portion 27G between the through holes 27a and 27b.

The lever 24 is attached to the inner ring 29 and connected to a pin 33 that passes through a long hole 27d provided in the sleeve 27.

34 is a rotary table provided on the base machine 11, and when the rotary body 3 is inserted into the rotary shaft 2 by the press-fitting unit 23, a semi-finished product consisting of the rotary shaft 2 and the resin molded product 1 into which the rotary shaft 2 is temporarily press-fitted. It has a holding jig 35 for holding the.

This rotary table 34 is connected to the above-mentioned placement unit 1.
It is driven in the direction of the arrow in the figure by a drive mechanism 15 provided at 2, and is synchronized with the operations of the chucking unit 16 and the press-fitting unit 23.

In such a configuration, the resin molded product 1 is now fitted into the recess 35a of the holding jig 35 disposed on the rotary table 34, and the rotation shaft 2 is inserted into the through hole 5 provided in the resin molded product 1.
is temporarily press-fitted, the rotary table 34
When the rotary table 34 rotates in the direction of the arrow shown in the figure, the rotary table 34
When one of the upper holding jigs 35 comes to a position facing the press-fitting unit 23, the rotational movement of the rotary table 34 is stopped and the chucking unit 16 waits for the movement of the rotating body 3 to be transferred.

In other words, it is temporarily stopped in the state shown in FIG.

Next, with the rotating body 3 held in the sliding grip jig 22 that constitutes the chucking unit 16, the chucking unit 16 moves backward in the direction indicated by the arrow as shown in FIG. The gripping jig 2
2 is a pilot 25 constituting the press-fit unit 23;
When the position corresponding to the sleeve 27 is reached, as shown in FIG. 5, only the pilot 25 constituting the press-fitting unit 23 is lowered in the direction of the arrow B shown in the figure by one driving source in the upper unit 12 of the placemen. that pilot 2
The shaft 30 of the pilot 25 is inserted into the through hole 6 of the rotating body 3 held by the gripping jig 22.
is lowered until the tip of the shaft 30 comes into contact with the tip of the rotating shaft 2 temporarily press-fitted into the resin molding machine 1 held by the holding jig 35.

The overstroke amount of the pilot 25 that is lowered by one driving source in the above-mentioned placemen upper unit 12 is absorbed by the spring 31 constituting the pilot 25.

After the pilot 25 holds the rotating body 3 in this manner, the chucking unit 16 further retreats in the direction of arrow A as shown in FIG. 5, and the gripping jig 22 is separated from the rotating body 3.

Next, after the chucking unit 16 has moved backward, as shown in FIG. The rotating body 3 inserted into the shaft 30 of the pilot 25 is pushed downward and inserted into the rotating shaft 2 side.

During the lowering process of the sleeve 27 constituting the press-fit unit 23, the engager 32 provided on the shaft 30 constituting the pilot 25 moves into the stepped portion 2 in the through hole of the sleeve 27.
7c, the shaft 30 of the pilot 25 descends together with the sleeve 27 in the direction of the arrow C shown in the figure, and the rotating body 3 is accurately inserted into the rotating shaft 2, and the rotating shaft 2 is accurately press-fitted into the resin molded product 1. do.

After the rotating body 3 is inserted into the rotating shaft 2 as described above, the press-fitting unit 23 moves upward in the direction of arrow C, and the chucking unit 16 moves forward in the direction of arrow A, so that the third
Return to the state shown in the figure.

Then, by the operation of the rotary table 34, the holding jig 35 is
The machine waits for a semi-finished product consisting of a rotary shaft 2 held by a rotary shaft 2 and a resin molded product 1 temporarily press-fitted therein to be delivered.

The composite part in which the rotary body 3 is inserted into the rotary shaft 2 press-fitted into the resin molded product 1 is transferred to the next process by the rotary table 34, and the rotary shaft 2 exposed on the surface of the rotary body 3 is transferred to the next process by the rotary table 34.
The removal stopper 4 is fitted into the groove 7 provided in the groove 7, and the composite part is completed.

Here, the relationship between the high rod 25 constituting the press-fit unit 23 and the sleeve 27 is as follows when the retainer 32 attached to the shaft 30 constituting the pilot 25 abuts against the stepped portion 27c of the through hole of the sleeve 27. The dimension i between the lower end of the sleeve 27 and the lower end of the shaft 30 is the target dimension between the top surface of the rotating body 3 inserted into the rotating shaft 2 press-fitted into the resin molded product 1 and the tip of the rotating shaft 2. is set equal to t.

That is, the above-mentioned dimension l is set to be the dimension from the tip of the rotating shaft 2 to the groove 7 into which the removal stopper 4 provided at the tip is fitted.

Therefore, when the press-fitting unit 16 is lowered and the rotating body 3 is inserted into the rotating shaft 2 by the sleeve 27 and its lower surface is brought into contact with the upper surface of the resin molded product 1, the shaft 30 of the pilot 25 is also lowered. Since the rotating shaft 2 is press-fitted, the height from the tip of the rotating shaft 2 to the upper surface of the rotating body 3 inserted into the rotating shaft 2 is always kept constant at the dimension t.

This height dimension t is independent of the dimensional error in the thickness H of the rotating body 3, the dimensional error in the length L of the rotating body 2 press-fitted into the resin molded product 1, and the variation in the height direction of the holding jig 35. It is always kept constant.

At this time, the downward driving force of the sleeve 27 constituting the press-fitting unit 25 is set to be larger than the contact force of the rotary shaft 2 press-fitted into the resin molded product 1, and the downward force of the sleeve 27 constituting the press-fitting unit 25 is set to be larger than the contact force of the rotating shaft 2 that is press-fitted into the resin molded product 1. The dimension to the tip of the rotating shaft 2 temporarily press-fitted into the rotating shaft 2 should be set to be larger than the sum of the thickness H of the rotating body 3 and the length t to the groove forming part of the rotating shaft 2. Must be.

As described above, according to the present invention, the pilot 25 is slidably provided in the sleeve 27 constituting the press-fit unit 23, and the stepped portion of the through hole 27at27b provided in the sleeve 27 is provided in the shaft 30 constituting the pilot. 27c is provided, and the relationship between the tip of the sleeve 27 and the tip of the shaft 30 when the retainer 32 and the stepped portion 27c are in close contact with each other in the downward process of the press-fit unit 23 is determined. A rotating body 3 inserted into the rotating shaft 2 from the tip of the rotating shaft 2 inserted by the press-fitting unit 23.
Since it is set to be equal to the target dimension up to the top surface, the dimensions at the tips of the rotating shaft 2 and the rotating body 3 are independent of variations in the dimensions in the thickness direction of the rotating body 3 inserted into the rotating shaft 2. The rotary shaft 2 and the rotating body 3 can be installed in such a manner that the mutual relationship between the rotary shaft 2 and the rotating body 3 is always constant, and the dimensional error of the rotating body 3 can be absorbed and the installation can be performed reliably without rattling in the thrust direction. be.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an example of a composite part, FIG. 2 is an external perspective view of a main part showing an example of the configuration of a composite part assembly apparatus of the present invention,
FIG. 3, FIG. 4, FIG. 5, and FIG. 6 are enlarged sectional views of essential parts for explaining the operation of the device. 1... Resin molded product, 2... Rotating shaft, 3
...Rotating body, 4...Removal stopper, 5,
6...Through hole, 7...Concave groove, 23...
...Press-fitting unit, 25...Pilot, 2
7...Sleeve, 30...Shaft,
31... Spring, 32... Engagement element, 27
a, 27b...through hole, 27c...stepped portion.

Claims (1)

[Claims] 1. A press-fitting unit consisting of a sleeve having an axial through-hole and a pilot provided in the through-hole of the sleeve, the pilot being able to move forward and backward with respect to the sleeve, and the sleeve operating with a delay in the operation of the pilot. A shaft is provided at the lower end of the pilot, an engager is provided on the shaft, a step portion to be engaged with the engager is provided in the through hole of the sleeve, and the engager of the shaft is provided in the step portion. The configuration is such that when engaged, the dimensional difference between the lower end of the sleeve and the lower end of the shaft is equal to the dimensional difference between the upper surface of the rotating body and the upper end of the rotating shaft, and the rotating shaft is temporarily press-fitted into the through hole of the resin molded product. The shaft of the press-fitting unit is placed on the upper end of the rotating shaft of the semi-finished product into which the rotating body is fitted, the sleeve is placed on the upper surface of the rotating body, and the press-fitting unit is pressed until the engager of the shaft engages with the stepped portion of the through hole. A composite parts assembly apparatus characterized in that the dimensional difference between the upper surface of the rotating body and the upper end of the rotating shaft is always defined constant.