JPH0532181B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention can be used reliably even for inferior tension coil springs in which the length of the coil part is not constant due to variations in the number of turns in the coil part of the tension coil spring. This invention relates to a spring supply jig that can be used for spring hanging work.

[Conventional technology]

6 to 12 show an example of a conventional device for performing spring-loading work, with FIG. 6 being a front view of the hand for spring-loading work, and FIG. 7 being a side view of the main parts of FIG. 6. , FIG. 8 is a front view showing the positional relationship between the spring hanging work hand and the spring supply jig at the start of operation;
Fig. 9 is a side view of the main part with the claw open, Fig. 10 is a front view showing the spring hanging work hand lowered onto the spring supply jig, and Fig. 11 is the hook part inserted into the hook receiver. 12th front view showing the state in which
The figure is a plan view showing the positional relationship between the spring supply jig and the tension coil spring. As shown in FIGS. 6 and 7, the spring hanging work hand 1 is guided by two guide shafts 3 fixed to a frame 2 and slides while maintaining a parallel state. A pair of movably supported fingers 4, each of which is rotatably supported by a pair of pins 5,
A pair of pawls 8 having a pinion 6 coaxially with the pin 5 and having a hook part rotation prevention groove 7 at one end, and a rack that is threadedly engaged with the pair of pinions 6 and moves in a straight line to open and close the pair of pawls 8. 9, a pair of air cylinders 10 fixed to each of the pair of fingers 4 to move the rack 9 in a straight line, a rack 11 having one end fixed to the upper part of the pair of fingers 4, and a pair of racks 11. An air cylinder 1 having a pinion 12 screwed together and rotatably fixed to a frame 2, and a rod having a tip fixed to one of a pair of fingers 4.
3 and a pair of stoppers 14 fixed to the frame 2.

The operation of the conventional example as described above will be explained as follows. FIG. 8 is a sectional view showing the positional relationship between the spring hanging work hand 1 and the spring supplying jig 15 at the start of operation. will be placed on. Here, as shown in FIG. 9, when the air cylinder 10 is actuated to push out the rack 9 and the spring hooking hand 1 is lowered with the claw 8 open, the state as shown in FIG. 10 is obtained. Become. After this, when the air cylinder 10 is operated and the rack is pulled back to its original position, the claw 8 is closed, and the hook part rotation prevention groove 7 provided in the claw 8 is pulled to the boundary between the hook part and the coil part of the tension coil spring 16. to hold the tension coil spring 16.
Next, the spring hanging work hand 1 was raised, the air cylinder 13 was activated, the distance between the fingers 4 was opened to a predetermined size regulated by the stopper 14, and the hand 1 was moved above the product at a predetermined assembly position. The hook portion of the tension coil spring 16 is then lowered and inserted into the hook receiver 17 of the product to a predetermined depth. This state is shown in FIG. In this state, operate the air cylinder 10 again to push out the rack 9 and open the claw 8 to release the tension coil spring 16.
is assembled to the hook receiver 17 of the product. Thereafter, the spring-loading work hand 1 is raised, the air cylinder 13 is activated, and the distance between the fingers 4 is returned to the initial state regulated by the stopper 14, and the spring-loading work hand 1 is returned to its initial position. Return it to the top of the supply jig 15. In this way, the tension coil springs 16 are sequentially assembled.

By the way, FIG. 12 shows a cross-sectional view just before the claw 8 grips the tension coil spring 16, of which FIG. 12a shows a predetermined tension coil spring 16.
Fig. 12b shows a case where the tension coil spring 16, which has a shorter length, is placed in the spring supply jig 15 because the number of turns in the coil part is less than the predetermined one. This shows the case where the image is placed closer to the right side of the image. When the claw 8 is closed in this state, the first
In the case of Fig. 2a, the claw 8 can grasp the boundary between the hook part and the coil part, whereas in the case of Fig. 12b, the claw 8 pinches the vicinity of the center of the hook part and the coil part.

[Problem that the invention seeks to solve]

The conventional device for performing spring hanging work is composed of the spring supply jig 15 and the spring hanging work hand 1 as described above, so that the coil portion of the tension coil spring 16 is If the length changes due to variations in the number of turns, etc., or if the position of the hook portion of the tension coil spring 16 on the spring supply jig 15 changes, the claws 8 will not be able to grip the original position. As a result, not only was the tension coil spring 16 held in an unstable state, but insertion into the hook receiver 17 often failed. Therefore, it is necessary to repeat the series of spring hanging operations, strictly control the quality of the tension coil spring 16, and then reposition it within the spring supply jig 15, resulting in an inefficient spring hanging operation. The problem was that they were forced to do so.

This invention was made in order to solve the above-mentioned problems, and even for tension coil springs in which the length of the coil part varies slightly due to variations in the number of turns, etc., the claw of the spring-hanging work hand can be attached to the coil part. To provide a spring supplying jig which enables highly reliable spring loading work in that the boundary between a hook part and a hook part can be reliably pinched and the center of the hook part can be reproducibly positioned at a predetermined position.

[Means for solving problems]

The spring supply jig according to the present invention includes a pair of hook holders on which the hook portion of a tension coil spring is placed horizontally, a relief hole provided in the hook holder, and a pair of hooks inserted into the hook portion. idea,
a rotation mechanism that performs the above-mentioned insertion operation of the hook pin;
A mechanism for moving the hook pedestal in the direction in which the tension coil spring is pulled is provided.

[Effect]

In the spring supply jig of this invention, a pair of hook pins are inserted into the hook portion of a tension coil spring placed on a pair of hook holders, and then, while the hook pins remain inserted, the hook holder on the movable side is inserted. By sliding the coil portion on the base in the axial direction to a predetermined position, the boundary between the hook portion of the tension coil spring and the coil portion can be reproducibly positioned at the predetermined position.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 relate to a spring supplying jig according to an embodiment of the present invention, FIG. 1 is a sectional view of the spring supplying jig, and FIG. 2 is a plan view of the same spring supplying jig.
FIG. 3 is a front view when the hook pin is inserted into the hook of the tension coil spring placed on the spring supply jig, and FIG. 4 is a plan view showing the positional relationship between the spring supply jig and the tension coil spring. FIG. 5 is a front view showing the positional relationship between the spring hanging work hand and the spring supplying jig at the start of the operation. In FIGS. 1 to 4, the spring supply jig 18 is attached to the base 1.
A hook holder 20 fixed to the base 19 and two guide shafts 2 fixed to the spring holder 20.
1, a movable hook holder 22 that is slidably supported while being guided by a guide shaft 21, and a hook holder 2.
an air cylinder 23 whose tip is attached to the air cylinder 2 to move it in a straight line; and the pair of hook holders 2.
0, 22, a pair of members 25 rotatably supported by a pair of pins 24, a pair of pneumatic rotary actuators 26 that rotate the members 25 via the pair of pins 24, and a pair of members 25. The hook pin 28 is fixed and can be inserted into an escape hole 27 provided in the pair of hook holders 20 and 22. In FIG. 5, the spring hooking hand 29, which assembles the tension coil spring 16 together with the spring supplying jig 18, is attached to the frame 30 at a predetermined distance so that it can be inserted into the frame 30 and the hook receiver 17 as is. a pair of fixed fingers 31;
It is composed of a pair of claws 8 used in a conventional spring-loading work hand 1, a pin 5 forming an opening/closing mechanism for the claws 8, a pinion 6, a rack 9, and an air cylinder 10.

Next, the operation of the above embodiment according to the present invention will be explained. A pair of hook holders 20, 22 and a pair of hook pins 2 are in the state shown in FIGS. 1 and 2.
8 comes to rest, the tension coil springs 16 separated one by one are supplied, and the hook holders 20, 2
2 (supply means not shown). Thereafter, the pair of pneumatic rotary actuators 27 are operated and rotated, and the pair of hook pins 28
is rotated 180 degrees around the central axis of the pin 24 via the member 25 and inserted into the hook portion of the hooked coil spring 16 and the escape hole 26 in the hook holders 20 and 22 as shown in FIG. Stand still. Figure 4a shows the hook pin 28 and tension coil spring 16 at this time.
This is a sectional view showing the positional relationship of the hook part of the figure.If the hook pin 28 is arranged in this way, the hook pin 28 will be reliably attached to the hook part even with a poor-quality spring that has conventionally failed to be assembled. It is possible to insert. Next, when the air cylinder 23 is operated and the hook holder 22 is retracted, the pair of hook pins 28 are spread to a predetermined distance, and at the same time, the tension coil spring 16 is hooked on the inner periphery of the hook portion by the hook pins 28. The tension coil spring is stretched in the tension direction. (As shown in Fig. 4b.) Here, even if the hook pin 28 pushes apart tension coil springs with slightly different numbers of turns, the hook portion will not deform much, so the distance between the hook pins 28 and the hook portion The boundary between the hook portion and the coil portion, which is determined by the shape of the hook portion, will be in a fixed position with good reproducibility, regardless of the length of the coil portion and the position of the tension coil spring 16 within the hook holders 20, 22. After this, the spring hanging work hand 2 is placed in the position shown in Fig. 5.
9 descends with the claw 8 open, closes the claw 8, grips the already stretched tension coil spring 16, and then moves the pneumatic rotary actuator 2
7 to return the hook pin 28 to its initial state, allowing the hook portion to escape upward. The method of opening and closing the claw 8 at this time is exactly the same as the conventional method. Next, the spring hooking work hand 29 is raised, moved above the product at a predetermined assembly position, and then lowered, so that the hook part of the tension coil spring 16 held is attached to the hook receiver 17 of the product.
Insert it to the specified depth. After this, the claw 8 is opened in the same manner as above and the tension coil spring 1 is released.
6 is assembled to the hook receiver 17 of the product, the spring hooking work hand 29 is raised again and returned to its initial position above the spring supplying jig 18. In this way, the tension coil springs 16 are sequentially assembled.

Although the above embodiment shows an example in which the sliding movement of the hook holder 22 is guided by the two guide shafts 21, the sliding movement of the hook holder 22 may be guided by other guide mechanisms, or the pair of hook holders 20, 22 may be guided. It is also possible to make both of them slidable.

〔Effect of the invention〕

As described above, according to the present invention, there is provided a pair of hook holders on which the hook portion of a tension coil spring is placed horizontally, a relief hole provided in the hook holder, and a pair of hooks inserted into the hook portion. Since it is equipped with a pin, a rotation mechanism for inserting the hook pin, and a mechanism for moving the hook holder in the tension direction of the tension coil spring, the length of the coil part of the coil spring can be changed slightly due to variations in the number of turns, etc. Even when assembling a poor-quality spring, the boundary between the hook and the coil gripped by the spring-loading hand is reproducibly positioned and can be reliably gripped without pinching the center of the hook or the coil, making assembly easier. It is possible to perform spring hanging work with fewer mistakes, improve productivity in assembling products, and provide a spring supply jig that can supply products at low cost.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a spring supply jig according to an embodiment of the present invention, FIG. 2 is a plan view of the spring supply jig shown in FIG. 1, and FIG. 3 is a spring supply jig shown in FIGS. 1 and 2. 4th front view showing a state in which the hook pin is inserted into the hook part of the tension coil spring placed on the jig;
Figures a and b are plan views showing the positional relationship between the tension coil spring and the spring supply jig shown in Figures 1 and 2; A front view showing the positional relationship between the jig and the spring-loading hand, Figure 6 is a front view of a conventional spring-loading hand, Figure 7 is a side view of the main parts of Figure 6, and Figure 8 shows the start of operation. Fig. 9 is a front view showing the positional relationship between the conventional spring-loading hand and the conventional spring-supplying jig; Fig. 9 is a side view of the main parts of the conventional spring-supplying jig with its claws open; Fig. 10 11 is a front view showing the state in which the conventional spring hanging work hand is lowered onto the spring supply jig, and FIG. 11 is a front view showing the state in which the hook part is inserted into the hook receiver.
FIG. 12 is a plan view showing the positional relationship between a conventional spring supply jig and a tension coil spring. In the figure, 16... tension coil spring, 17
... Hook holder, 18 ... Spring supply jig, 2
0,22...Hook stand, 28...Hook pin. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. In a device that performs a spring hanging operation in which the hook portion of a tension coil spring having hook portions at both ends is locked to a hook holder at a predetermined position, a pair of hook holders on which the hook portion of the tension coil spring is placed horizontally; , a pair of hook pins inserted into the relief hole provided in the hook holder and the hook portion, a rotation mechanism for performing the above-mentioned insertion operation of the hook pin, and a rotation mechanism that moves the hook holder in the direction in which the tension coil spring is pulled. A spring supply jig characterized by being equipped with a mechanism.