JPS5928926B2 - How to twist communication cables - Google Patents

Description

[Detailed Description of the Invention] The present invention is applicable to a method for twisting communication cables, more specifically, to twisting strands of wires, and also to twisting pairs of cut twisted wires (hereinafter referred to as cuts), etc. This can prevent alignment errors.

This invention relates to a method for twisting communication cables. Conventionally,
A method of twisting pairs or cuts of strands, or collectively twisting cuts, etc., to perform pressure winding of yarn or tape will be described with reference to FIG.

For example, FIG. 1 shows a case where a center type tape winding device is used and a rotary winding type winding device is used. The wires are twisted together at the intermediate strands 8 and proceed to form the intermediate strands 8 and enter the twisting base 3. The tape or presser system T sent out from the tape winding device 2 immediately before the twisting cap 3 is wound around the outside of the intermediate strand 8, and the intermediate strand 8 is rotated in the twisting direction of the rotary winding device 4. Product stranded wire 102 which is twisted together with tie tape or holding thread T
As a result, it is wound up on the rotary winding device 4. In such a conventional method, the strands or cuts w are once twisted into intermediate strands 8 in the intermediate twisting base 101;
A tape or holding thread T is wound around this intermediate strand 8.

Thereafter, these are twisted together in the twisting base 3, and the twisting pitch progresses to become a finer product strand 102. As can be seen from this process, the position on the stranded wire cross section that the strands or cuts, etc. occupied in the intermediate stranded wire 8 often changes little by little as a result of the increase in the degree of twist downstream of the stranding cap 3. arise. Furthermore, intermediate stranded wire 8
Even if the strands or cut wires W partially protrude due to differences in the tension of the wires, this part is held down by the tape or holding thread T and enters the twisting cap 3 as it is. , it may also occur that the wires are twisted and tightened in an irregular shape that is almost unchanged. As described above, the so-called arrangement failure, such as the protrusion of the strands or cuts w in the product stranded wire 102, or the cross-sectional position deviation, has been considered a major drawback in the conventional method. This invention was made to eliminate these drawbacks, and
The basic idea is to eliminate what is thought to be the cause of the shortcomings of conventional methods, namely, the so-called two-stage twisting in which the intermediate strands are twisted, tape or presser yarn is wrapped around them, and then twisting is added. At the same time, in order to accurately determine the position of the strands or cuts on the cross section of the product stranded wire, a step is added in which the strands are once introduced into a small-diameter segregating die.

The method of the present invention will be explained below with reference to FIG. 2 and subsequent figures.

The strands, cuts, etc. w sent out from an appropriate feeding device (not shown) are first gathered together in the collecting nozzle 5. As shown in FIG. 4, the collecting cap 5 is a ring-shaped cap having a relatively small-diameter opening 51, and is used to temporarily collect wires, cuts, etc. w in close proximity to each other. The strands, cuts, etc. w collected in the collection cap 5 proceed downstream and are fed through two fixed wire segment caps 6, 6 spaced apart along the traveling direction.

As shown in the cross section of FIG. 3, the branching cap 6 has a required number of through holes 61 arranged on the same circumference through which strands or cuts w are passed one by one. In the illustrated example, five through holes 61 are formed for collecting five cuts, and in this embodiment, they are arranged on both sides of the center type tape winding device 2 for convenience. While the strands or cuts, etc. w run through the two branching ferrules 6, 6, which are spaced apart in the direction of travel, the strands, cuts, etc. w do not touch each other, as can be readily seen from the through hole 61 in FIG. They remain tangential and parallel. After this strand or cut w is introduced into the twisting cap 3, the tape or presser thread T is fed out from the tape device 2 at this entrance.
are wound together, twisted together as the rotary winding device 4 rotates, and wound on the rotary winding device 4 as a product strand 9.

A characteristic feature of this inventive method described above is that the strands or cuts w flowing into the twisting cap 3 from the segment cap 6 are arranged so that the position of the through hole 61 of the segment cap 6 is at a radius from the center axis. Since it is located close to the direction, its inflow angle θ is small.

As a result, each strand or cut w is in a state of approximately the same tension, and even when the wires are assembled in the twisting cap 3, there is no sharp bend, so no significant tension imbalance occurs, and the product Since the position of each strand or cut etc. w on the cross section of the stranded wire is almost reserved by the branching cap 6, correct arrangement is guaranteed. The greatest feature of this invention is, of course, that it eliminates the conventional two-step twisting process, and wraps the tape or presser thread T at the point when the strands or cuts, etc. It is.

As a result, the causes of misalignment in the prior art described in detail above are completely eliminated, and a good product stranded wire can be obtained. In the device implementing this invention, the collective cap 5
Alternatively, the segment line cap 6 shown in FIG. 3 may be used.

Of course, the same applies when a side type tape winding device is used instead of the center type. In this invention, as is obvious from the detailed explanation already given, (1) the tape or presser yarn is wound in parallel when the strands or cuts are not yet twisted, and immediately after that, they are twisted together once; Do not correct the misalignment due to the error.

(Ii) The inflow angle into the stranding cap is small, so it is difficult to cause tension imbalance between strands or cuts, etc., and there is no protrusion of strands or cuts, etc. (Each strand or The positions of cuts, etc. are set correctly in advance, and the wire flows into the twisting nozzle in that state, so that the correct arrangement can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a simplified side view showing the prior art, FIG. 2 is a simplified side view explaining the method of the present invention, FIG. 3 is a sectional view taken along the - line in FIG. 2, and FIG. 4 is the same as in FIG. 2. FIG. 2...Tape winding device, 3...Twisting cap, 5...Collecting cap, 6...Separating cap.

Claims (1)

[Claims] 1. Two fixed wire segment caps 6 arranged to be spaced apart from each other in the direction of movement of the strands or quads, etc., to be twisted.
6 in parallel and close to each other;
A method for twisting communication cables, comprising the step of twisting the strands or quads, etc. in a twisting cap 3 and then pressing and winding them on the outside.