JPS5947408B2 - Manufacturing method of flat cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Background of the Invention As shown in FIG.
A flat cable 16 in which parallel parts 14 and parallel parts 14 arranged in parallel and fused are alternately formed is known.

FIG. 2 is a conceptual explanatory diagram showing the known manufacturing method.

Reference numeral 18 denotes a twisting section, which is made up of a large number of twisters 20.

Each twister 20 is made up of a disk 24 having two small holes 22 and a gear 26 (see FIG. 3), which are interlocked with each other.

When the twister 20 is rotated while the insulated wire core 10 is advanced to the right in FIG. 2, the pairing portion 12 is formed.

At this time, since the adjacent twisters 20 rotate in the opposite direction, the adjacent pairs 11 are arranged alternately in SZ. Furthermore, when the rotation of the twister 20 is stopped, the parallel portion 14 is formed.

Furthermore, when forming the next pair of twisted portions 12, the twister 20 is rotated in the opposite direction to the previous one.

Therefore, the twist is in the opposite direction from the previous time. Since the distance between the pairs 11 is wide after leaving the twisting section 18, the distance between the pairs 11 is narrowed, that is, they are focused.

Then, they are arranged at predetermined intervals in the parallel portion 14 and fused by a press 28. By the way, when twisting the twister 20 by rotating it, the twister is generally not twisted (if the twister is twisted, the device becomes very complicated).
.

Therefore, after twisting, it becomes more curly, and in extreme cases, the pair 11 becomes twisted as shown in FIG. In this way, the reason why the insulated wire core 10 is twisted is that the insulated wire core 10 is not completely plastically deformed when twisted, and a part of the stress is transferred to the insulated wire core 10.
This is because it remains within 0.

In addition, this force also causes it to recoil. Conventionally, in order to remove such curls and untwisted layers, a method was used in which the pair 11 immediately after being twisted at the twisting section 18 was pinched and compressed with a take-up sheet roll (Japanese Patent Application Laid-Open No. 55 −
26207).

However, in the case of the insulated wire core 10 having high elasticity, that is, the stranded wire conductor is thick, the coating is thick, the coating material has high elasticity, etc., the above method may not be effective.

The present invention provides that even in the case of a wire core with high elasticity,
To provide a method that can easily and effectively remove lint and prevent lint without using any special equipment.

Structure of the Invention As described above, when forming the brace portion 12, it is not twisted, so that stress remains in the insulated wire core 10, resulting in further curling (twisting).

However, not all of the rotational force during twisting remains as stress. A considerable portion of this becomes permanent strain (plastic deformation). The present invention utilizes this fact.

In other words, the percentage of permanent distortion is increased by adding more than necessary.

The remaining stress is then removed by reversing.
For example, as shown in Fig. 5, the length of the paired twisted portion 12 is L)
If the pitch is P, the necessary rotation speed R of the twister 20 is R=L/P, but in the present invention, this is
=L/P+", and then reverse rotation by α.

At this time, if the stress given by the α rotation in the opposite direction is equal to the residual stress generated when the L/p+α rotation is performed, these stresses cancel each other out because they are in opposite directions.

Therefore, no stress remains within the pair 11. It is possible to remove more wrinkles and prevent curls from coming back. Example PV with 0.12-×7 conductors and outer diameter of 1.05-φ
In the case of insulated wire core 10 of C insulated wire, and L=500−,
Good results were obtained when P=25-.

Note that the above-mentioned value of 0.3 largely depends on the characteristics of the striatal bodies to be twisted, and also depends on the twisting pitch, etc., and therefore, it is necessary to determine the value with sufficient consideration of these conditions.

Effects of the Invention There is no need to add any special equipment, and it is possible to easily and effectively remove clutter and prevent backlash.

[Brief explanation of the drawing]

Fig. 1 is a general construction drawing of the flat cable 16, Fig. 2 is a general explanatory drawing of the manufacturing method of the flat cable 16, Fig. 3 is an enlarged view taken from -, and Fig. 4 is a more detailed drawing. FIG. 5 is an explanatory diagram of the state in which the pair 11 is twisted due to the twist, and FIG. 5 is an explanatory diagram of the present invention.

Claims (1)

[Claims] 1. A method for manufacturing a flat cable in which a plurality of insulated wire cores are passed through twisters in the twisted portion to alternately form paired twisted portions and parallel portions, and the parallel portions are bonded. A method for manufacturing a flat cable, which comprises rotating the cable by more than the number of rotations, and then rotating the cable in the opposite direction by the amount of the extra rotation to form the paired twisted portion.