JPH0837080A - Manufacture of horizontal chain type terminal metal - Google Patents

Abstract

PURPOSE:To prevent the occurrence of defective crimping on manufactured lateral linkage type metals by forming angular holes at the positions of round holes when the round holes required during the manufacturing process become unnecessary. CONSTITUTION:A belt-like raw material plate 20 is pressed in the vertical direction, and irregularities are formed for preventing a slip and a deformation. Round holes 22 for positioning are bored on a terminal carrier section 21 so that a pilot pin sharpened at the tip can be inserted regardless of directivity. The raw material plate 20 is punched into prescribed shapes and folded to form terminal metals 23. Angular holes 24 are bored at the positions where the round holes 22 are formed on the terminal carrier section 21. Even if a feed claw 31 is retreated by a stroke sufficiently larger than the pitch between terminals 10 in the lateral linkage type terminal metals thus manufactured, the claw 31 is stopped on the terminal carrier section 21 before it reaches the first angular hole 24c. A desired feed action can be given to the terminal metals 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a lateral chain type terminal fitting, and more particularly to forming a hole in a terminal carrier portion used for a feeding operation or the like.

[0002]

2. Description of the Related Art Conventionally, when manufacturing a lateral chain type terminal fitting, round holes and square holes are alternately and continuously formed in a terminal carrier portion. The round hole is required so that the cylindrical pilot pin used for the feeding operation in the manufacturing process can be easily inserted regardless of the direction, and the square hole crimps the electric wire to the manufactured horizontal chain type terminal metal fitting. Sometimes it is required to engage the feed pawl with a straight tip. FIG. 11 shows a lateral chain type terminal metal fitting having a long pitch between terminals, as viewed from above, among the lateral chain type terminal metal fittings thus formed, and FIG. 12 shows a cross section of the terminal carrier portion. Is shown.

In the initial state, the feed pawl 1 is stationary at the front position in the square hole 2b, and when the feed operation is required, the feed pawl 1 is moved.
Moves backward by a constant feed claw stroke. At this time, the tip of the feed claw 1 passes through the square hole 2b and passes over the round hole 3b, but the tip of the feed claw 1 has an acute angle with respect to the forward direction and an obtuse angle with respect to the reverse direction. Therefore, the square hole 2b and the round hole 3b are not caught.
When the feed claw 1 moves backward until it comes into the square hole 2c, the feed claw 1 starts moving forward by the amount of the backward movement. At the time of this forward movement, the feed claw 1 having an acute angle bites into the edge of the square hole 2c and locks it, so that the terminal fitting 5 moves forward together with the terminal carrier portion 4 to a predetermined position.

The tip of the feed claw 1 is linear as shown in FIG. 13, and fits snugly in a square hole having a linear edge. On the other hand, if it is a round hole as shown in FIG. 14, when the feed claw 1 shifts in the lateral direction, the locking position changes from the normal position, and the feed amount becomes insufficient. However, if it is a square hole, the feed amount will not be insufficient even if it is displaced laterally.

[0005]

FIG. 15 shows a lateral chain type terminal fitting having a short pitch between terminals as seen from above, and FIG. 16 shows a cross section of the terminal carrier portion. When the feed claw 1 moves rearward by a fixed feed claw stroke, since the pitch between the terminals is short, the square hole 2e
After passing through the circular hole 3e, the square hole 2f, and further the circular hole 3f, it stops and starts to move forward. Then, if it moves forward by the stroke of the feed claw, the next terminal fitting 5 moves to a predetermined position.

However, the feed claw 1 which should normally pass may be caught in the round hole 3f, and the terminal carrier portion 4 may be sent out while being caught. Then, there is a problem that the next terminal fitting 5 is sent out more than the original feeding amount and passes through the regular position, so that normal crimping cannot be performed. The present invention has been made in view of the above problems, and when crimping an electric wire to a manufactured terminal fitting, a lateral chain type terminal that can always perform crimping by always sending out a desired feed amount. It is intended to provide a method for manufacturing a metal fitting.

[0007]

In order to achieve the above-mentioned object, the invention according to claim 1 cuts and bends a strip-shaped plate material to leave a strip-shaped terminal carrier portion continuous in the longitudinal direction. When manufacturing a terminal fitting that is connected at a right angle to the terminal carrier part, make a round hole into the terminal carrier part into which a cylindrical pilot pin used for feeding operation can be inserted, and insert the pilot pin into the round hole. In the method of manufacturing a horizontal chain type terminal fitting that performs the feeding operation by performing the feeding operation, the feeding operation performed by inserting the pilot pin into the round hole becomes unnecessary after the feeding operation performed at the position of the round hole is substantially perpendicular to the feeding direction. A square hole having a toe is formed.

[0008]

In the invention according to claim 1 configured as described above, the round hole is held only while it is necessary to perform the feeding operation with the pilot pin, and when it is unnecessary, the square hole is placed at the same position as the round hole. Therefore, only the square holes are formed in the terminal carrier portion of the lateral chain type terminal fitting to be manufactured.
That is, only the square hole in which the feed claw is to be caught is left in the terminal carrier portion, and the desired feeding operation is always performed by being caught in the square hole.

[0009]

As described above, according to the present invention, since there are no round holes left in the terminal carrier portion that may cause the feed claws to be caught, the horizontal chain type terminal fittings produced are always in a desired amount. It is possible to provide a method of manufacturing a lateral chain type terminal fitting capable of preventing a crimping failure by performing a feeding operation.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a top view of a lateral chain type terminal fitting in each manufacturing process in one embodiment of the present invention. It should be noted that there is a little manufacturing process of the lateral chain type terminal fitting between each manufacturing process. In the first step, as shown in FIG. 1, the strip-shaped material plate 20 is pressed from above and below to form irregularities to prevent slippage and deformation. In the second step, as shown in FIG. 2, a positioning round hole 22 is formed in the terminal carrier portion 21 so that the pilot pin having a sharp tip can be inserted regardless of the directionality. When the third step is finished, as shown in FIG. 3, the material plate 20 is die-cut into a predetermined shape and is bent to form the terminal fitting 23.

In the fourth step, as shown in FIG. 4, square holes 24 are punched at the positions where the round holes 22 are formed in the terminal carrier portion 21. FIG. 5 shows a lateral chain type terminal metal fitting manufactured in this manner, and showing a lateral chain type terminal metal fitting having a short pitch between terminals as seen from above, and FIG. The cross section is shown. As shown in the figure, even if the feed claw 31 moves backward by a stroke sufficiently larger than the inter-terminal pitch, the feed claw 31 leaves the first square hole 24a and then passes only the square hole 24b, and then the next square hole 24b. It stops on the terminal carrier part 21 before reaching 24c. Therefore, even if the forward movement is started again, only the square hole 24b is caught first, and the desired feeding operation can be performed to the terminal fitting 23.

In the above embodiment, the square hole 2
4 has a rectangular shape, the point is that there is only a linear locking side 25 that locks when the feed claw 31 whose tip is linear moves forward. Therefore, as shown in FIGS. As described above, naturally, the sides other than the locking side 25 are curved or slanted. As described above, since the round hole 22 is required in the manufacturing process, the round hole 22 is formed by punching the round hole 22 for the time being.
When 2 is no longer needed, a square hole 24 is formed at that position so that the round hole 22 does not remain in the lateral chain type terminal fitting to be manufactured.

[Brief description of drawings]

FIG. 1 is a top view of a lateral chain type terminal fitting that has undergone a first step.

FIG. 2 is a top view of a lateral chain type terminal fitting after a second step.

FIG. 3 is a top view of a lateral chain type terminal fitting after a third step.

FIG. 4 is a top view of a lateral chain type terminal fitting that has undergone a fourth step.

FIG. 5 is a top view of a lateral chain type terminal fitting.

FIG. 6 is a cross-sectional view of a lateral chain type terminal fitting showing a feeding operation of a feeding claw.

FIG. 7 is a top view of a lateral chain type terminal fitting showing a modification of the square hole.

FIG. 8 is a top view of a lateral chain type terminal fitting showing a modification of the square hole.

FIG. 9 is a top view of a lateral chain type terminal fitting showing a modification of the square hole.

FIG. 10 is a top view of a lateral chain type terminal fitting showing a modification of the square hole.

FIG. 11 is a top view of a conventional lateral chain type terminal fitting having a long terminal pitch.

FIG. 12 is a cross-sectional view showing a normal feeding operation in a conventional horizontal chain type terminal fitting.

FIG. 13 is a top view showing a locked state of a square hole and a feed pawl.

FIG. 14 is a top view showing a locked state of a round hole and a feed pawl.

FIG. 15 is a top view of a conventional lateral chain type terminal fitting having a short terminal pitch.

FIG. 16 is a cross-sectional view showing a normal feeding operation of a conventional horizontal chain type terminal fitting.

[Explanation of symbols]

 20 ... Material plate 21 ... Terminal carrier part 22 ... Round hole 23 ... Terminal metal fitting 24 ... Square hole 25 ... Locking side

Claims (1)

[Claims] 1. When manufacturing a terminal fitting, which is formed by cutting and bending a strip-shaped plate material to leave a strip-shaped terminal carrier portion continuous in the longitudinal direction, and connecting the strip at right angles to the terminal carrier portion. Make a round hole in the carrier to insert a cylindrical pilot pin used for feeding operation,
In the method of manufacturing a lateral chain type terminal fitting in which the pilot pin is inserted into the round hole to perform the feeding operation, the position of the round hole after the feeding operation performed by inserting the pilot pin into the round hole becomes unnecessary. A method of manufacturing a lateral chain type terminal fitting, characterized in that a square hole having a locking side substantially perpendicular to the feeding direction is formed in the.