JPS62120983A - Hand for spring peg work - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is capable of reliably carrying out a spring loading operation even for a tension coil spring whose hook surfaces at both ends are twisted and are not in the same plane. To provide a spring hanging work hand capable of surely performing spring hanging work regardless of the spring force of the spring.

[Conventional technology]

FIGS. 8 to 14 are drawings showing a conventional device for performing a spring hanging operation. 8 and 9 are cross-sectional views of the spring-loading work hand, and the spring-loading work hand θ
η is a frame (6), a pair of fingers (■) rotatably supported by the frame (6) and a pin (roller), and a claw portion fixed to the lower end of the finger (2) for holding the tension coil spring (5). and a spring that is applied between a pair of fingers (goods) and biases the lower end of the ring in the closing direction), and is fixed to the upper end of the frame (9),
And the Rondo @ force is formed so as to protrude into the frame 0,
It consists of a cylinder in which the rod Oη is constantly pushed up by a spring, and a pair of links ■ that rotatably connect the lower end of the rod Oη and the upper end of the finger ■. It opens and closes to hold the tension coil spring (5). At this time, the opening angle of the fingers is regulated to a predetermined angle by the stopper 62. A hole 6υ for supplying and exhausting compressed air is formed at the upper end of the cylinder α and is connected to an air source via a hose and a direction switching valve (not shown). Figure 10 is a diagram showing the relative position of the spring hanging work hand @η and the spring supply jig αη at the start of operation.The spring supply jig αυ is placed horizontally on the hook part of the tension coil spring (5). a pair of hook pedestals to be placed; a base holder that supports the hook pedestals (c) so as to be slidable in the axial direction of the coil portion of the tension coil spring (5);
A stopper box is provided on the pace wire to prevent the distance between the pair of hook holders 1) from becoming narrower than a predetermined distance, and a pair of springs press the pair of hook holders 1) against the stopper 1). (2).

Next, the operation will be explained. In Figure 10, the tension coil springs (5) that are separated and supplied in parallel on the hook holder Qυ of the spring supplying jig αυ are such that the hook part is supported by the hook holder Qυ, and the hook part is supported by the hook holder Qυ. It is held horizontally so that it is in the most stable contact with the pedestal Qυ. Next, move the spring hanging work hand @η to a means of movement (not shown)
When lowered by the finger ■, the claw ■ fixed to the lower end of the finger ■ becomes the one hook cradle as shown in Figures 11 and 12. It is inserted between the coil part and the hook part at both ends of the tension coil bar + (5) held at the t. In this state, when compressed air is fed into the cylinder, the roller '7) is pushed down against the counter pressure of the spring (to), causing the finger to rotate through the link. As a result, the finger rotates the tension coil spring (5) while it is still attached to the claw (to) until it hits the stopper 153, and while stretching the tension coil spring (5), pushes out the hook holder 3t and expands the hook holder 3t. As shown in Fig. 13, the tension coil spring (5) is held by the tensile force of the tension coil spring (5). Next, the spring hanging work hand @υ holding the tension coil spring (5+) is raised by the moving means, and after being moved above the product (7) in the predetermined assembly position, it is lowered, as shown in Fig. 14. Insert the hook part of the tension coil spring (5) held into the hook receiver (6) of the product (7) to a predetermined depth as shown. In this state, exhaust the compressed air supplied to the cylinder α9. The rod Oη is pushed up by the anti-pressure of the spring ring 08 and rises.At the same time, the ring is also moved by a spring and a tension coil spring.
The tension coil spring (5) is rotated in the direction in which the tip is closed by the tensile force of step 5), and the tension coil spring (5) is assembled to the hook receiver (6) of the product (7). At this time, the hook receiver (6) of the product (7) is the hole f53 formed at the lower end of the finger ■! It is mated with. In this state, when the working hand aη is raised by the moving means, the tension coil spring (
5) remains on the product (7) while being attached to the hook receiver (6), the finger (2) separates from the product (7 order λ), and the claw (to) also separates from the tension coil spring (5).As a result, the finger - is released from the spring. O
Closed by force of 5 and spring.

The handle is then returned to its initial position by the moving means. In this way, the tension coil springs (5) can be sequentially assembled to the product (7).

[Problem that the invention seeks to solve]

Since the conventional spring hanging device is constructed and operates as described above, it is effective for normal tension coil springs whose hook surfaces at both ends are on the same plane, but There was a drawback that it could not be applied to tension coil springs whose surfaces were twisted and not on the same plane. In addition, after inserting the hook part of the tension coil spring into the hook holder of the product, if the compressed air supplied to the cylinder is exhausted, the tip of the finger will automatically rotate in the direction of closing due to the tensile force of the spring and the tension coil spring. However, when the spring force of the spring is sufficiently larger than that of the tension coil spring, there is a drawback that the spring deforms the tension coil spring or the hook receiver of the product.

The present invention has been developed to solve the above-mentioned problems, and it is possible to reliably hang a tension coil spring even when the hook surfaces at both ends are twisted and are not on the same horizontal plane. To obtain a hand for spring hanging work that can surely carry out spring hanging work regardless of the strength of spring force.

[Means for solving problems]

The present invention has been made to achieve the above objects,
Opening/closing machine'! IIt? To provide a spring-loading work hand consisting of a pair of fingers each having a pair of claws and a hook holding pin at the lower end, and an opening/closing mechanism for the pair of fingers.

[Effect]

The hook holding pin in the present invention presses down the hook part of the supplied tension coil spring to make it horizontal, and then the claws sandwich the tension coil spring between the hook part and the coil part at both ends of the tension coil spring to hold the tension coil spring.

[Embodiments of the invention]

Figures 1 to 7 show embodiments of the present invention, with Figure 1 being a sectional view of the spring-loading hand, Figure 2 being a side view of the main parts of Figure 1, and Figure 6 at the start of operation. Figure 4 is a side view showing the tension coil spring placed on the spring supply jig, and Figure 5 is a cross-sectional view showing the positional relationship between the spring hanging work hand and the spring supply jig. FIG. 6 is a front view showing a state in which the spring hooking hand is lowered onto the spring supplying jig, and FIG. 7 is a front view showing the state in which the hook part is inserted into the hook receiver. As shown in FIGS. 1 and 2, the spring-loading work hand 6υ is guided by two guide shafts (rollers) fixed to the frame 621 and a guide shaft ring to maintain a parallel state. A pair of fingers are slidably supported, each nine pairs of the fingers are rotatably supported by a pair of pins σ4, and a pinion σ9 is coaxial with the pin σ, and one end Hook part rotation prevention groove -
a pair of claws (to), a rack σe that moves in a straight line by screwing with the pair of pinions σ9 to open and close the pair of claws; A pair of air cylinders ση that move the σQ in a straight line, and a hook holding pin ση that is vertically slidably supported on the lower end of the finger (goods) and normally protrudes a predetermined length by a compression coil spring σ. , a rack mount having one end fixed to the top of a pair of fingers, and a pair of racks 16.
119 and rotatably fixed to the frame [F] 3, and a feed screw screwed to and rotatably screwed to a nut hammer fixed to one of a pair of fingers. , a DC servo motor σQ and an encoder circle for positioning 9 rotation angles of the feed screw, and the DC servo motor σC and encoder συ are connected to a numerical control device (not shown), and the numerical control The rotation angle of the DC servo motor chain is positioned according to the command of the device, and the finger (
It is designed to be opened and closed.

A detailed explanation of the present invention configured as above is as follows. FIG. 3 is a sectional view showing the positional relationship between the spring hanging work hand 6υ and the spring supplying jig αV at the start of operation, and the spring supplying jig (11
When the tension coil spring (5) supplied on the hook portion is normal and not twisted, the tension coil spring (5) is placed horizontally with the hook surface in the most stable state. However, in the case of the tension coil spring in this embodiment in which the hook portions at both ends are twisted, the hook surface is placed diagonally Kt with respect to the spring supplying jig 0L, as shown in FIG. Here, as shown in Fig. 5, when the air cylinders σ are operated to lower the rack ff [9 is in abutment and the hoe is opened for spring loading work] and the rack ff is lowered, the 6th As shown in the figure, the hook surface becomes horizontal when the hook holding pin σ presses the hook part of the tension coil spring (5).After this, the air cylinder ση is activated to pull the rack σe back to its original position. When it is pushed in, the claw closes, and the hook part rotation prevention groove 101 provided at the end of the claw grips the boundary between the hook part and the coil part of the tension coil spring (5), and holds the tension coil spring (5). , raise the spring-loading work hand 6υ, rotate the DC servo motor button by a predetermined angle according to the command from the numerical control device, open the specified interval to a predetermined size, and perform the predetermined assembly of the product at the position. Move the tension coil spring (5) upward and then lower it, and insert the hook part of the tension coil spring (5) into the product to a predetermined depth. At this time, the hook holding pin 63 is inserted as shown in FIG. It is pushed by the hook receiver (6) and escapes. In this state, operate the air cylinder surface again to push out the rack σQ and open the claw, and the tension coil spring (5) is assembled into the hook receiver (6) of the product. After that, the spring-loading work hand 6υ is raised, and the DC servo motor Cr0) is rotated by a predetermined angle according to the command from the numerical control device, and the spacing between the fingers is returned to the initial state, and the spring-loading work is completed. Return the hand to the starting position above the spring supply jig αυ.In this way, the tension coil springs (5
) is assembled.

In the above embodiment, the spring hanging work hand 6D
The fingers are always kept parallel, and the spacing between the fingers can be controlled to any size using a numerical control device, so it can be applied to tension coil springs of different lengths. This can be done by simply changing the commands of the numerical control device.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a pair of claws equipped with an opening/closing mechanism and a hook holding pin that is slidably supported in a direction perpendicular to the fingers are attached to the lower ends of a pair of fingers. This allows for reliable spring loading even for tension coil springs where the hook surfaces at both ends are twisted and are not in the same horizontal plane, and the spring tension work can be performed reliably regardless of the strength of the tension coil spring's spring force. A hand for spring hanging work is obtained.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a spring-loading work hand showing an embodiment of the present invention, Fig. 2 is a side view of the main part of Fig. 1, Fig. 3 is a sectional view of the embodiment of the invention, Figure 5. 6 and 7 are a side view, a side view, a front view, and a front view showing the main parts of the embodiment of the present invention, respectively. FIG. 8 is a sectional view of a conventional spring-loading work hand, and FIG. 9 is a conventional 10 is a cross-sectional view of the conventional spring-loading hand and spring supplying jig showing the state at the start of operation. FIG. 12 is a side view of FIG. 11, FIG. 13 is a sectional view of the conventional example in which the tension coil spring is held, and FIG. 14 is the conventional example in the spring-loaded state. FIG. 3 is a front view of the spring hanging work hand and the product. [Ql... Hook part rotation prevention groove, 6D... Spring hanging work hand, I21... Frame, l83)... Guide shaft, I4... Finger, Transfer... Claw, Ra...・Rack, branch)
...Pinion, Trowel...Nut, II...Feed screw, I0)...DC servo motor, συ...Encoder, ffa...Compression coil spring, σJ...Hook holding pin, I4) ...pin, I9...binion, σ
e...Rack, ffη...Air cylinder. In each figure, the same reference numerals indicate the same or corresponding parts. Agent Patent Attorney Tadashi Sato Figure 6 Figure 8 Cause Bar/L/bq7g Figure 7 Figure 9

Claims (4)

[Claims] (1) A spring hanging work hand characterized by comprising a pair of fingers each having a pair of claws and a hook holding pin provided at the lower ends thereof, each having an opening/closing mechanism, and an opening/closing mechanism for the pair of fingers. (2) The hook holding pin is supported slidably against the finger, and normally protrudes a predetermined length by a spring, and when inserting the hook portion of the tension coil spring into the hook holder of the product, A spring-loading work hand according to claim 1, characterized in that the hand is configured to escape when pushed by a receiver. (3) The finger opening/closing mechanism is connected to a numerical control device so that the distance between the pair of fingers can be controlled to an arbitrary size while maintaining the parallel state.
Hand for spring hanging work described in ). (4) The spring hanging work hand according to claim (1), characterized in that the claw is provided with a groove for preventing rotation of the hook portion.