JPH0622735B2 - SZ stranded wire cross winding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a method for winding SZ stranded wire on a tape.

[Conventional technology]

An SZ stranded wire, in which a plurality of strands are alternately S-stranded and Z-stranded with appropriate lengths in the longitudinal direction, has excellent electrical characteristics and is a so-called slack stranded wire that branches from the middle of the wiring. It is widely used as a communication cable because it is easy to take.

The typical stranded wire method will be described with reference to FIG. 1 showing an apparatus for carrying out the method of the present invention.
Through the rotary eye plate 4 and the twisting die 14 on the right side of the figure.
In (1), the guide tubes 13 are collectively set so as to be drawn to the downstream side, and then the rotary eye plate 4 is rotationally driven so as to reverse its rotation direction at appropriate intervals. Then, the tape is wound and pressed from above the twisted wire so that the twist given before is not returned at the time of reverse rotation. The tape winding is performed immediately before the twisting die 14 in the Z direction winding tape 2 and the S direction winding tape 3. The tape cross winding method of winding the two tapes in a crossover manner is often used.

[Problems to be Solved by the Invention]

However, when the strand diameter is large or the number of twists is large and the torsional elasticity is large, the preceding twist return cannot be completely suppressed by the tape when the twist direction is reversed, and the twist pitch becomes uneven. However, there is a drawback in that the twisted wire as a whole becomes jagged when it is extremely twisted and unstretched without forming the body as a twisted wire.

Further, it is known that the tape wound in the Z direction works effectively as a press winding in the S twist section of the wire, and conversely, the tape wound in the S direction works effectively as a press winding in the Z twist section of the wire. Therefore, it is better to use tape winding in the opposite direction to the twisting direction of the strands, and to reduce the tape material by tapering the tape winding in the same direction to save tape material, but in the past there was no such consideration. The tape winding in both the S and Z directions is handled the same.

[Means for Solving the Problems]

The present invention has been made in order to solve the above-mentioned problems, and a plurality of element wires are alternately S-twisted and Z-twisted at appropriate lengths in the longitudinal direction, and are wound in the S-direction on an SZ twisted wire. In a tape cross winding method of cross winding a tape and a Z direction winding tape, in the S twist section of the wire, the winding pitch of the Z direction winding tape is made smaller than the winding pitch of the S direction winding tape, and Z
In the twist section, the winding pitch of the S-direction winding tape is made smaller than the winding pitch of the Z-direction winding tape.

[Action]

In the S-twist section of the wire, the Z-direction winding tape, which is effective in suppressing the twist, is tightly wound to surely suppress the twist return, and in the Z-twist section, it is effective in the S-direction winding to suppress the twist. The tension of the tape is wrapped tightly to prevent the twisting back. The tape, which is wound in the opposite direction to the twist direction of the strands, is wound with a coarse pitch, thereby saving tape material.

〔Example〕

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

The rotating mesh plate 4 through which the wire w is inserted is a gear meshing with the pinion 5 rotated by the drive motor 6, and rotates forward and backward 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 arranged opposite to the surface near the outer periphery of the reversal detection plate 7. This sensor 8 sends a signal to the control device 9, and the brake device 17, which will be described later,
19 is controlled.

The base 10 has a hollow columnar shape, is provided with a flange portion at an end portion on the side opposite to the rotary eye plate 4 side, has a tape passage 12A extending in the axial direction, and has a winding roller at the other end. The S-direction tape winding flyer 12 is attached to the rotating eye plate 4
Is rotatably supported coaxially. On the outer circumference of the S direction tape winding flyer 12, a Z direction tape winding flyer 11 of the same shape is rotatably supported, and both the tape winding flyers 11 and 12 are rotationally driven in opposite directions as shown by arrows in the figure. It

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

A tape cheese 18 is attached to the flange portion of the S-direction tape winding flyer 12 so that it can be fed out and rotated via an appropriate tension applying device such as a magnetic brake. The tape cheese 16 is likewise rotatably attached by means of a tensioning device. These rotary brake devices are for applying appropriate tension to the fed tape.

On the other hand, the two output shafts of the differential gear device 20 driven from the drive motor 22 via the non-throwing transmission 21 rotationally drive the S-direction tape winding flyer 12 and the Z-direction tape winding flyer 11, respectively. Then, on the output shaft for driving the Z-direction tape winding flyer 11, a braking device 17 such as a powder brake, which makes it easy to electrically control the braking force from the outside, and the S-direction tape winding flyer 12 on the opposite side are driven. A similar braking device 19 is attached to the output shaft.

Next, the method of the present invention carried out using this apparatus will be described.

The rotary eye plate 4 is normally and reversely reversed in accordance with the normal and reverse rotation of the drive motor 6, and the twisted wire 1 in which the S twists and the Z twists are alternately arranged in the longitudinal direction advances inside the twisted wire guide tube 13.

A characteristic step of the present invention is that when the rotating eye plate 4 is reversed and starts to rotate clockwise when viewed from the left side of FIG. 1 (that is, when the wire w is about to start to be S-twisted). , The controller 9 issues a command to make the braking device 17 relatively weak against the braking force of the braking device 19 so that the Z-direction tape winding flyer 11 rotates relatively fast, and thereby the Z-direction winding tape 2 is wound. When the pitch is made small and the winding is tight, and when the rotating eye plate 4 is reversed and then about to start rotating in the counterclockwise direction as well (that is, when the wire w is about to start to be Z-twisted), the brake device 19 The braking force of 1
In order to make the S direction tape winding flyer 12 rotate relatively fast, thereby making the winding pitch of the S direction winding tape 3 small and densely winding it. . It goes without saying that the tape wound in the opposite direction and the tape wound in the opposite direction in this step have a large winding pitch, that is, are wound roughly.

As a result of this step, as shown in FIG.
In the twisting section, the winding pitch of the Z-direction winding tape 2 is small, that is, the winding direction is tightly wound to increase the tightening effect, and in the Z-twisting section, the winding pitch of the S-direction winding tape 3 is small. The effect of tightening the winding is great, and the return of the twist in the reversing portion is surely suppressed.

〔The invention's effect〕

According to this invention, by taking the above steps,
(I) In the S twist section of the wire, the Z-direction winding tape effective for suppressing the twist is tightly wound to surely suppress the twist return, and in the Z twist section, the S direction effective for suppressing the twist. The direction winding tape is tightly wound, and it is possible to reliably suppress the twist return.
In addition, (ii) the tape in the winding direction, which is not very effective for untwisting, has an advantage that the pitch is coarsely wound and the tape material can be saved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an example of an apparatus for carrying out the present invention, and FIG. 2 is a side view showing a state in which a tape is wound around an SZ stranded wire in the S and Z directions. 1 ... SZ twisted wire, 2 ... S direction winding tape, 3 ... Z direction winding tape, 7 ... reversal detection plate, 8 ... sensor, 9 ... control device, 17, 19 ... brake device, 20 ...... Differential gear unit.

Claims (1)

[Claims] 1. A S-direction winding tape (3) and a Z-direction winding tape (3) on an SZ stranded wire in which a plurality of strands (w) are alternately S-stranded and Z-stranded with appropriate lengths in the longitudinal direction. In the tape cross winding method of winding 2), the winding pitch of the Z direction winding tape is made smaller than the winding pitch of the S direction winding tape in the S twist section of the strand (w), and the strand (w ) In the Z twist section, the winding pitch of the S-direction winding tape is made smaller than the winding pitch of the Z-direction winding tape.