JPH0551414B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention can also be applied to poor-quality tension coil springs in which the length of the coil part is not constant due to variations in the number of turns of the coil part of the tension coil spring.
This relates to a spring supply jig necessary for reliably performing spring hanging work.

[Conventional technology]

Figures 9 to 15 are, for example, Japanese Patent Application No. 60-257618.
FIG. 9 is a cross-sectional view of a spring-loading hand, and FIG. A side view of the main parts in the figure, Figure 11 is a sectional view showing the positional relationship between the spring hanging work hand and the spring supply jig at the start of operation, and Figure 12 is the same as Figure 10 with the claws open. A side view, FIG. 13 is a front view showing the spring hanging work hand lowered onto the spring supply jig, FIG. 14 is a front view showing the hook part inserted into the hook receiver, and FIG. It is a top view showing the positional relationship of a supply jig and a tension coil spring. As shown in FIGS. 9 and 10, the spring hanging work hand 1 is guided by two guide shafts 3 fixed to the frame 2 and kept in a parallel state. A pair of fingers 4 are slidably directed, each of which is rotatably directed by a pair of pins 5, and has a pinion 6 coaxially with the pin 5, and has a hook portion at one end. A pair of claws 8 with anti-rotation grooves 7
, a rack 9 that is threadedly engaged with a pair of pinions 6 to move in a straight line and opens and closes a pair of claws 8, and a pair of fingers 4.
a pair of air cylinders 10 fixed to each of the racks 9 to move the racks 9 in a straight line; and a rack 11 supported slidably in the vertical direction at the lower ends of the fingers 4 and having one end of each fixed to the upper ends of the pair of fingers 4. and,
A pinion 12 is screwed into a pair of racks 11 and rotatably fixed to the frame 2, an air cylinder 13 is fixed to the frame 2 and opens and closes the fingers 4, and a pair of stoppers 14 are fixed to the frame 2. It is structured accordingly.

The operation of the conventional example as described above will be explained as follows. FIG. 11 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. 12, when the air cylinder 10 is activated to push out the rack 9 and the spring hooking hand 1 is lowered with the claw 8 open, the state shown in FIG. 13 is obtained. become. After this, air cylinder 1
0 and pulls the rack 9 back to its original position, the claw 8 closes, and the hook part rotation prevention groove 7 provided in the claw 8 pinches the boundary between the hook part and the coil part of the tension coil spring 16, and the tension coil spring 16 is released. Hold 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. This state is shown in FIG. 14, in which the hook part of the tension coil spring 16 is inserted into the hook receiver 17 of the product to a predetermined depth by lowering it backward. In this state, when the air cylinder 10 is operated again to push out the rack 9 and open the claw 8, 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. 15 shows a cross-sectional view just before the claw 8 grips the tension coil spring 16, of which FIG. 15a shows a predetermined tension coil spring 16.
FIG. 15b shows a case where the tension coil spring 16 is placed approximately in the center of the spring supplying jig 15, and FIG. The figure shows the case where the image is placed closer to the right side of the screen. When the claw 8 is closed in this state, as is clear from this figure, in the case of FIG. 15a, the claw 8 can grasp the boundary between the hook part 16a and the coil part 16b,
In the case of FIG. 15b, the claw 8 will sandwich the center portion of the hook portion 16a and the coil portion 16b.

[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 16b of the tension coil spring 16 is If the length of the tension coil spring 16 changes due to variations in the number of turns, or if the position of the hook portion 16a of the tension coil spring 16 on the spring supplying jig 15 changes, the claw 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 hooking operations, strictly control the quality of the tension coil spring 16, and then reposition it within the spring supply jig 15, which results in poor work efficiency in spring hooking. There was a problem with being forced to work.

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 hanging 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 both hook portions of a tension coil spring are placed substantially horizontally, and a spring feeding jig that is erected perpendicularly to the receiving surface of the hook holders and near the center of the hook portions. The hook holder includes a pair of hook pins, and a mechanism for moving the hook holder in the direction in which the tension coil spring is pulled.

[Effect]

In the spring supply jig according to the present invention, when the hook part of the tension coil spring is placed on the hook holder, the hook pin is inserted into the hook part, so in this state, the hook holder is pulled in the direction of tension of the coil spring. By moving it, the boundary between the hook part and the coil part of the tension coil spring can be positioned with good reproducibility.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. Fig. 1 is a plan view, Fig. 2 is a cross-sectional view taken along the line - in Fig. 1, Fig. 3 is a cross-sectional view taken along the line - Fig. 1, and Fig. 4 is a cross-sectional view taken along the line - in Fig. 1. 3 is the same sectional view as FIG. 3, FIG. 5 is a plan view of the main part of FIG. 4, and FIG. 6 is a plan view showing the positional relationship between the spring supply jig and the tension coil spring.
FIG. 7 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. 1 to 3, the spring supply jig 18 is attached to a hook holder 20 fixed to a base 19.
, two guide shafts 21 fixed to the base 19 and the hook holder 20 , a movable hook holder 22 guided and slidably supported by the guide shaft 21 , and a tip end of the hook holder 22 . an air cylinder 23 to which is attached and moves this in a straight line;
It consists of a pair of hook pins 24 vertically erected on the receiving surfaces of a pair of hook holders 20 and 22.

In FIG. 7, a spring hooking hand 25, which assembles the tension coil spring 16 together with the spring supplying jig 18, is attached to the frame 26 at a predetermined interval such that it can be inserted into the hook receiver 17 as it is. 26, a pair of claws 8 used in the conventional spring hanging work hand 1, a pin 5, a pinion 6, a rack 9, and an air cylinder 10 that constitute the opening/closing mechanism of the claws 8. It is made up of.

Next, the operation will be explained. In the spring supply jig 18 in the state shown in FIGS. 1 to 3, the tension coil springs 1 are separated one by one in advance.
6 is supplied and placed on the hook holders 20 and 22, the hook pin 24 is inserted into the hook portion 16a of the tension coil spring 16 as shown in FIGS. 4 and 5 ( (supply means not shown).
By arranging the hook pin 24 as shown in FIGS. 4 and 5, the hook pin 24 can be securely attached to a poor-quality spring that has conventionally failed to be assembled, as shown in FIG. 15b. It can be inserted into the hook portion 16a. Next, when the air cylinder 23 is actuated to move the hook holder 22 in the direction in which the tension coil spring 16 is pulled, the pair of hook pins 24 are spread to a predetermined distance as shown in FIGS. The tension coil spring 16 is hooked by the hook pin 24 on the inner periphery of the hook portion 16a, and is stretched in the direction in which the tension coil spring 16 is pulled.
Here, even if the hook pin 24 pushes apart tension coil springs with slightly different numbers of turns, the hook portion 16a will not deform much. Therefore, the distance between the hook pins 24 and the hook portion 16a
Determined by the shape of Hook part 16a and coil part 1
6b is the length of the coil portion 16b and the tension coil spring 16 in the hook holders 20, 22.
Regardless of the position, it will come to the correct position with good reproducibility. Thereafter, the spring hooking hand 25 in the position shown in FIG. 7 descends with the claw 8 open, closes the claw 8, and holds the hooking coil spring 16 which has already been stretched. 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 25 is raised, moved above the product at a predetermined assembly position, and then lowered to place the hook portion 16a of the tension coil spring 16 held thereon in a predetermined position on the hook receiver 17 of the product. Insert to depth. After this, the claw 8 is opened in the same manner as described above and the tension coil spring 16 is released.
is assembled to the hook receiver 17 of the product, the spring hooking work hand 25 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.

FIG. 8 is a diagram showing another embodiment of the spring supply jig 18 according to the present invention, in which a pair of hook pins 24 can be slid in and out of the receiving surfaces of the hook holders 20 and 22. This is what I did. To explain in the figure, 28 is a pair of hook holders 2.
A pair of air cylinders fixed at 0, 22, 29
is a pair of hook pins 2 inside the hook cradle 20, 22.
4.Escape hole provided to allow sliding. By operating this air cylinder 28, a pair of hook pins 24 attached to the tip of the rod are
can slide inside the escape hole 29. In the embodiment shown in FIG. 8, when the tension coil spring 16 is placed on the hook holders 20 and 22, the hook pin 2
4 can be inserted into the escape hole 29, which has the effect of making it easier to place the tension coil spring 16.

Further, in the embodiment shown in FIG. 8, the pair of hook pins 24 are each moved independently by a pair of air cylinders 28, but the hook pins 24 are configured to be moved by a mechanism different from this. You may.

In each of the above embodiments, an example was shown in which the sliding movement of the hook holder 22 is guided by two guide shafts 21, but the sliding movement of the hook holder 22 may be guided by other guide mechanisms, or by a pair of hook holders 20, 22. It is also possible to make both of them slidable.

〔Effect of the invention〕

As described above, according to the present invention, even when assembling a poor-quality spring in which the length of the coil part of a tension coil spring varies slightly due to variations in the number of turns, the hook part and the coil part held by the spring hanging work hand can be used. Since the boundary between the hook and the coil can be positioned with good reproducibility, the spring-loading work hand can reliably grip the center of the hook or the coil without pinching the hook, making it possible to perform spring-loading work with fewer assembly errors. In addition, the action of stretching the tension coil spring to a predetermined length and the opening/closing action without gripping,
Since the spring supplying jig and the spring hanging work hand are used separately, the structure of the spring hanging work hand is simplified, and the assembly, adjustment, and maintenance of each mechanical part can be easily performed. From the above points, productivity is improved when assembling products, and this has the effect of supplying low-cost products.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG.
4 is the same sectional view as FIG. 3 showing the state in which the tension coil spring is placed;
Fig. 5 is a plan view of the main part of Fig. 4, Fig. 6 is a plan view showing the positional relationship between the spring supply jig and the tension coil spring, and Fig. 7 is the spring hanging work hand and spring supply at the start of operation. FIG. 8 is a sectional view showing another embodiment of the present invention, and FIG. 9 is a sectional view of a conventional spring-loading hand. Fig. 10 is a side view of the main part of Fig. 9, Fig. 11 is a sectional view showing the positional relationship between the spring hanging work hand and the spring supply jig at the start of operation, and Fig. 12 is the state in which the claw is opened. Figure 13 is a front view showing the spring hanging work hand lowered onto the spring supply jig, Figure 14 is a front view showing the hook part inserted into the hook receiver. , 15th
The figure is a plan view showing the positional relationship between the spring supply jig and the tension coil spring. In the figure, 16 is a tension coil spring, 16a
17 is a hook part, 17 is a hook receiver, 18 is a spring supply jig, 20 and 22 are hook holders, 24 is a hook pin, 23 is a moving mechanism, and 28 is a mechanism for moving in and out. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. In a device for performing a spring hanging operation in which the hook portions of a tension coil spring having hook portions at both ends are locked to a hook receiver at a predetermined position, both hook portions of the tension coil spring are each held substantially horizontally. a pair of hook pedestals placed on the hook pedestal, a pair of hook pins erected perpendicularly to the receiving surface of the hook pedestal and near the center of the hook portion, and the hook pedestal moved in the direction in which the tension coil spring is pulled. A spring supply jig characterized by being equipped with a mechanism. 2. The spring supply jig according to claim 1, comprising a mechanism for moving the hook pin into and out of the receiving surface.