JPH02241633A - Manufacture of sz stranded wire - 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 application field] This invention relates to a method for manufacturing an 82m wire.

[Conventional technology]

SZ stranded wire, which is made up of multiple wires alternately twisted in S and Z at appropriate lengths in the longitudinal direction, has excellent electrical properties and is easy to use, such as by removing branches from the middle of the wiring. For this reason, it is widely used as a communication cable.

A typical method for twisting wires will be explained with reference to FIG. 1, which shows an apparatus for carrying out the method of the present invention.
is inserted through the rotary eye plate 4 and the twisting die 14 on the right side of the figure is inserted.
The inside of the guide cylinder 13 is set at once so as to be taken downstream, and the rotary eye plate 4 is rotationally driven so that its direction of rotation is reversed at appropriate intervals. Then, in order to prevent the previously applied twist from returning when the twist is reversed, a tape is wrapped over the stranded wire to hold it down. The two pieces of tape are wrapped around the shape of the cross.

[Problem to be solved by the invention]

However, when the diameter of the strands is large or the number of strands twisted together is large and the torsional elasticity is high, when the direction of twisting is reversed, the tape cannot completely suppress the unraveling of the preceding twists, resulting in uneven twisting pitches. However, due to untwisting, the stranded wire does not form a solid body, and in extreme cases, the stranded wire as a whole becomes a mess.

[Means to solve the problem]

This invention was made in order to solve the above-mentioned problem, and is wound in the S direction on an S2 stranded wire in which a plurality of strands are alternately S-twisted and Z-twisted in appropriate lengths in the longitudinal direction. Tape and Z direction winding tape S
In the method for manufacturing a stranded wire, the tension of the Z-direction wound tape is strengthened in the sm section of the strand, and the tension of the S-direction wound tape is further strengthened in the 2-twist section of the strand. This is a method for manufacturing Sz wire.

[Effect]

In the S-twist section of the strand, the tension of the Z-direction-wound tape, which is effective in holding down the twist, increases and reliably suppresses untwisting, and in the Z-twist section, the S-direction-wound tape is effective in holding down the twist. The tension increases and reliably prevents untwisting.

〔Example〕

First, an apparatus for carrying out the method of the present invention will be described with reference to FIG.

The rotary eye plate 4 through which the wire W is inserted is a gear that meshes with a pinion 5 rotated by the drive motor 6, and rotates in forward and reverse directions as the drive motor 6 rotates forward and backward.

In addition to the rotary eye plate 4, a large-diameter gear-shaped reversal detection plate 7 meshes with the pinion 5, and a sensor 8 is disposed on a surface near the outer periphery of the reversal detection plate 7 to face it. This sensor 8 sends a signal to a control device 9 and a rotary brake device 1 to be described later.
7.19.

The base 10 has a hollow cylindrical shape and has a flange portion at the end opposite to the rotating eye plate 4, and has a tape passage 12A extending in the axial direction, and has a tape passage 12A extending in the axial direction. The provided S-direction tape-wrapped flyer 12 is connected to the rotating perforated plate 4.
is coaxially and rotatably supported. However, on the outer periphery of the lever S-direction tape-wound flyer 12, a Z-direction cheap-wrap flyer 11 having a similar shape is rotatably supported, and both tape-wound flyers 11 and 12 rotate in opposite directions as shown by the arrows in the figure. be done.

A cylindrical twisted wire guide tube 13 is coaxially fixed in the hollow portion of the S-direction tape-wound flyer 12, and a twisting die 14 is attached to the end thereof.

A tape cheese 18 is attached to the flange portion of the S-direction tape-wound fryer 12 so as to be able to be fed out and rotated via a suitable rotary brake device 19 such as an electromagnetic brake. Similarly, a tape cheese 16 is fed out and rotatably attached to the section via a rotary brake device 17.

These rotary brake devices are used to apply tension to the tape being fed out, and it is well known that applying the brake more strongly increases the tension in the tape.

Next, the present invention implemented using this device will be described in detail.

The rotary eye plate 4 is reversely reversed in accordance with the forward and reverse reversal of the drive motor 6, and the stranded wire 1 in which S-twist and Z-twist are arranged alternately advances inside the stranded wire guide tube 13.

The characteristic process of this invention is that when the rotary eye plate 4 is reversed and is about to start rotating clockwise when viewed from the left in FIG. A command is issued from the control device 9 to strengthen the rotary brake device 17 to increase the tension of the Z-direction winding tape 2, and then
When the wire W is about to reverse and start rotating counterclockwise (that is, when the strands W are about to start being Z-twisted), the rotational brake device 19 is strengthened to increase the tension of the S direction winding tape 3. .

Through this process, as shown in FIG.
In the twisting section, the tightening effect of the Z-direction winding tape 2 becomes large, and in the Z-twisting section, the winding effect of the S-direction winding tape 3 becomes large, thereby reliably suppressing the untwisting at the reversal section. It is.

〔Effect of the invention〕

According to the present invention, by performing the above steps, the tension of the tape wound in the Z direction, which is effective in suppressing the twist in the S-twist section of the strands, is increased to reliably suppress untwisting, and also in the Z-twist section. In this case, the tension of the tape wound in the S direction, which is effective in suppressing the twisting, is increased, which has the effect of reliably suppressing untwisting.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an example of an apparatus for implementing the present invention, and FIG. 2 is a side view showing a state in which a tape is wound around SZ stranded wire in the S direction and in two directions. 1... SZ stranded wire, 2... Z direction winding tape, 3...
... S direction winding tape, 7... Reversal detection plate, 8... Sensor, 9... Control device, 17.19... Rotation brake device, W... Element wire.

Claims (1)

[Claims] 1. An S-direction winding tape (3) and a Z-direction winding tape (2) are placed on an SZ-twisted wire in which a plurality of wires (W) are alternately S-twisted and Z-twisted at appropriate lengths in the longitudinal direction. In the method for manufacturing SZ stranded wire that is tape-wound, the tension of the Z-direction winding tape (2) is strengthened in the S-twist section of the wire, and the tension of the Z-direction winding tape (2) is increased in the Z-twist section of the wire. A method for producing an SZ stranded wire, characterized in that the tension of the tape (3) is further strengthened.