JPH022273B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention relates to a method for fixing wire rods, and in particular, to a method for fixing wire rods, in particular, in the manufacturing process of a connector, a wire rod is cut to a desired length, and a molded insulator is formed by cutting the wire rod to a desired length. The present invention relates to a method for individually fixing a plurality of wires prior to cutting in a device for press-fitting a plurality of lead terminals.

(b) Prior Art FIG. 2 is a perspective view of a multi-connector mounted on a printed board, and FIG. 3 is a side view showing the main structure of an apparatus for assembling the connector.

In Fig. 2, 1 is an insulator formed by molding an insulating resin, 2 is a pin-shaped terminal with a square cross section, and the terminal 2 is made by cutting a wire material to a desired length with a predetermined pitch (terminal press-fit pitch). They are aligned and press-fitted into the through hole of the insulator 1.

In FIG. 3, 3 is a wire rod with a rectangular cross section derived from a reel (not shown), 4 is a cylindrical die for cutting the wire 3, 5 is a punch that fits into a through hole passing through the die 4 in the vertical direction; 6 is a guide that guides the wire 3 to the die 4; 7 is a clamp that fixes the wire 3 between the die 4 and the guide 6; 8 is a rubber plate (receiving plate) facing the clamp 7; 9 is a clamp that fixes the rubber plate 8. It is a structural member that has been designed.

In this device, the die 4 and the guide 6 are formed with a guide groove in which the wire rod 3 runs, and the punch 5
is configured to move up and down along the through hole of the die 4, and the clamp 7 is configured to move up and down toward the rubber plate 8, and the plurality of wire rods 3 aligned in the thickness direction of the drawing paper are moved up and down along the through hole of the die 4. It is simultaneously fixed by the upward movement of the punch 5, and simultaneously cut by the downward movement of the punch 5. As a result, when a plurality of terminals 2 are cut and created at the same time, the insulator 1 moves forward (moves to the right in the figure) and the terminals 2 are press-fitted into the through holes 1a.

Thereafter, the vertical movement of the punch 5 and clamp 7, the feeding out of the plurality of wire rods 3, and the forward movement of the insulator 1 are repeated to complete the connector shown in FIG. 2 in sequence.

(c) Problems to be Solved by the Invention However, in the above device, the rubber plate 8 is sandwiched between a plurality of wire rods 3 and a metal clamp 7 that commonly faces each other, so there may be variations in the dimensions of each wire rod 3. Although it absorbs the parallelism error between the lower surface of the rubber plate and the upper surface of the pusher, only the portion of the wire rod 3 that is pressed wears out, so it needs to be replaced frequently, and due to the hassle, the replacement may be delayed. Wear progressed extremely quickly in just a few parts, and the cut lengths of the terminals 2 became uneven, resulting in the assembly of defective connectors.

(d) Means for Solving the Problems The present invention, which aims to eliminate the above-mentioned problems, has a plurality of rotatable and elastically deflectable clamps arranged in parallel and facing each other in parallel with a plurality of parallel wire rods. The wire rod is sandwiched and fixed between the clamp and the opposing fixed receiving plate by utilizing the elastic deflection.

(e) Effect That is, according to the present invention, the plurality of clamps facing the plurality of wire rods can be elastically deflected, and in order to use the bending to press the opposing wires against the receiving plate, the receiving plate is made of rubber. Elasticity is no longer required, making it possible to create a structure (for example, made of metal) with wear resistance for long-term use, and eliminating the conventional troubles and occurrence of defective products.

(f) Examples Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view A showing the main structure of an embodiment in which the present invention is applied to the device shown in FIG. 3, a perspective view B of the clamp used in the structure, and a front view C of the arrangement clamp. be.

In FIG. 1, 11 is a rectangular cross-section wire rod for the lead terminals of a connector, in which a plurality of wires are arranged in parallel in the thickness direction of the drawing paper, 12 is a receiving plate made of metal (SKS material),
13 is a component that supports the receiving plate 12; 14 is a metal (SKS material) clamp that is L-shaped in side view;
15 is a shaft that swingably supports the clamp 14 in which a plurality of protrusions 14a are arranged in parallel in the thickness direction of the paper;
6 is a compression coil spring facing each clamp 14;
17 is a stopper screw, 18 is an air cylinder, 1
9 is a drive shaft of the air cylinder 18, and 20 is a structural member that supports the coil spring 16 and the stopper screw 17.

In such a fixing device, a plurality of wire rods 11 are guided by the die 4 and the guide 6 shown in FIG. The clamp 14 swings in the same manner as the vertical movement of the clamp 7 described in FIG. 3.

That is, when the drive shaft 19 advances and the vicinity of the end of the hanging part of the clamp 14 comes into contact with the stopper screw 17, the vicinity of the end of the horizontal part of the clamp 14 rotates upward (clockwise), and the intermediate part of the wire rod 11 is rotated against the receiving plate. Press it against the bottom surface of 12 to fix it. Next, when the drive shaft 19 is moved backward, the clamp 14 rotates to follow the movement (leftward rotation) due to the restoring force of the coil spring 16, and the fixation is released. However, at the time of fixing, the vicinity of the horizontal end of the clamp 14 is pressed with appropriate force, that is, so strongly that the horizontal protruding piece 14a of the clamp 14 is bent within the elastic region.

Therefore, if the vertical movement of the punch 5 and the swinging of the clamp 14 shown in FIG. 3, the feeding out of the plurality of wire rods 11, and the forward movement of the insulator 1 are repeated in synchronization, a connector as shown in FIG. 2 is produced. will be completed in sequence. At this time, the device according to the present invention shown in FIG. The variation in the deflection is absorbed by the deflection, and the receiving plate 12 is made of metal (or made of a wear-resistant material such as hard resin).
Because it is pressed against and fixed, it exhibits sufficient resistance for long-term use.

(g) Effect of the invention As explained above, according to the present invention, when simultaneously fixing and releasing the fixing of multiple wire rods,
Compared to conventional methods, the service life is significantly longer, and the effect of eliminating the trouble of production management due to wear of fixed parts and the occurrence of defects in products using the wire material, such as connectors, is remarkable.

[Brief explanation of drawings]

1 is a side view showing the main structure of an embodiment in which the present invention is applied to the device shown in FIG. 3; FIG. The figure is a perspective view of a multi-connector mounted on a printed board, and FIG. 3 is a side view showing the main structure of an apparatus for assembling the connector. In the figure, 1 is the insulator of the connector, 2 is the lead terminal of the connector, 3 and 11 are wires, and 7 and 14
is a clamp, 8 and 12 are receiving plates, 14a is a protrusion,
shows.

Claims (1)

[Scope of Claims] 1 A plurality of clamps that can be rotated and elastically deflected in parallel and facing a plurality of parallel wire rods utilize the elastic deflection between the clamps and a fixed receiving plate that faces them. A method for fixing a wire, the method comprising sandwiching and fixing the wire. 2. The method for fixing a wire rod according to claim 1, wherein the wire rod is a plurality of wire rods having a rectangular cross section that are simultaneously inserted into one insulator.