JPH0465589A - Sz wire twisting by wire twisting machine of pipe type - Google Patents

Abstract

PURPOSE:To obtain high-quality twisted wire free from pulsation of tension by delivering wire material having the same length as wire material stored at the upper stream side of a stationary wire separating plate and using the delivered wire material as an increased wire material to be abruptly required during a time from starting of revolution of a wire twisting machine of pipe type from a neutral position to reverse rotation. CONSTITUTION:A rectangular inlet guide plate 8 having the same number of guide holes 81 bored at equal intervals through the guide plate as the number of wire materials 2 is installed in the upper stream of a stationary wire separating plate 6 of wire twisting machine of pipe type perpendicularly to the traveling direction of the wire material 2 and a moving plate 7 having the same shape as that of the guide plate fixed to a rack 71 in the upper stream at a given is laid in parallel with the guide plate movably forward and backward by a given distance by engaging the rack 71 through a pinion 72 with a normally and reversely rotatable pulse motor 73. Synchronizing with normal and reverse rotation of the wire twisting machine, the moving plate 7 delivers the wire material 2 having increased given length slantingly stretched between the guide plate 8 and the moving plate 7 in a process of returning from a broken line position to a solid line position and the wire material is stored in a process of removement of the moving plate 7 to the broken line position so the wire material is used as the increased wire material 2 to be abruptly required.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an SZ wire twisting method using a pipe type wire twisting machine.

[Conventional technology]

First, an overview of the pipe type wire twisting machine will be explained with reference to FIG.

This is a kind of wire twisting machine that is used, for example, when twisting appropriate filament bodies 2 in SZ twist around a tension member 1 as a central member. Corresponding to the downstream end, a fixed dividing line plate 6 is fixedly installed, which has a disk shape and has dividing holes formed in the peripheral part thereof in a uniform manner to guide the insertion of the filament body 2. A movable line plate 4 having a similar shape is provided in the section so as to be rotationally driven coaxially with the hollow tube 3 by a drive gear 5.

A twisting die 9 is disposed downstream of the hollow tube 3, and a twist stopping device for winding the twist stopping tape 10 is provided, and further downstream thereof, a suitable bowing device 11 is provided.

When the wire body 2 is S-twisted by this pipe type twisting machine, the direction of rotation of the movable branching plate 4 is reversed forward and backward at appropriate intervals, and a twist stopper tape 10 is wrapped just before the twisting die 9. Then the SZ twist is fixed.

As is well known, in the case of Sz stranded wire, by unraveling the reversed part of the twist, a considerably extra length of the filament body 2 is secured with respect to the tension member 1, so it is difficult to remove the branch line from that part. Because it is easy to use, it is often used in communication cables.

[Problem to be solved by the invention]

When the movable dividing plate 4 of the pipe-type wire twisting machine rotates forward and backward, the filament body 2 wraps around the outer periphery of the hollow tube 3 between the defining dividing plate 6 and the movable dividing plate 4, and this winding It is self-evident that the phenomenon of solving problems is repeated over and over again.

Of course, during this time, the pulling device 11 is pulling the stranded wire downstream, so the strand 2 continues to travel downstream. In Figure 3, the movable line plate 4 is rotated clockwise by 180° + 360' = 54 from the state shown in Figure 2 when viewed from the right side of the figure.
This is a depiction of the state rotated by 0°, but the striatum 2 is
As shown in FIG. 2, the filament bodies 2 are stretched parallel to each other between the fixed segment plate 6 and the movable segment plate 4 (
This is referred to as the neutral state of the pipe-type wire twisting machine in this specification), and the state in which the filament 2 shown in FIG. It is clear that the tension changes rapidly during the transition process leading to the rotation in the opposite direction and the state where the reversal is about to start.

When the movable segment plate 4 rotates 180° from the state shown in FIG. 2 (this state is not shown), the length of the two sides sandwiching the right angle becomes L as shown in FIG. A length equal to the length of the hypotenuse of the right triangle Fr7Tπ7, which is D (D is the distance between the dividing line holes 41 of the movable dividing plate), is required, and this difference is
An excessive amount of feed is required from the steady feed state of the filament body 2 by r7-r-L, and the tension increases rapidly.

When the movable dividing plate 4 further rotates by 360 degrees (the state shown in FIG. 3), the filament 2 is wound once around the hollow tube 3 (outer diameter d) in a helical wire shape, so that the filament 2 As shown in Figure 5, the length of the hypotenuse of a right triangle with lengths L and πd on both sides of the right angle is required, and the increase in length is -44d.
-L, and in the end, the total increase from the contracted state is Fr7 lower Tf"+ = -rr d -2L tonal.

Then, the striatum must be rapidly replenished from upstream for this increased length. In other words, a rapid increase in tension can be seen. Of course, such tension fluctuations affect not only the upstream side but also the downstream side.

On the other hand, when moving from the above-mentioned reverse start state to the neutral state, the increased length of the filament 2 temporarily remains, causing a situation in which the tension rapidly decreases.

In the above explanation, the timing of the start of reversal during sZ twisting using a pipe type twisting machine was explained as one winding around the hollow tube 3.
It is understandable that pulsating changes in tension will occur periodically in the filament body 2 for the reasons mentioned above, whether it is two turns or more, and this is preferable for the stranded wire that is the product. It has no impact.

[Means to solve the problem]

The present invention eliminates the above-mentioned difficulties and provides a method for twisting wires that prevents sudden changes in tension from occurring in the wire bodies. Upstream of the filament, a step of temporarily causing a plurality of filament bodies traveling to be supplied thereto to have a storage portion of a predetermined length, and a step of discharging this storage portion are periodically applied, The execution timings of the discharge process and the storage process are defined as the rotation timing from the neutral state to the start of reversal of the movable dividing plate of the pipe-type wire twisting machine, and the return rotation time from the reversal start state to the neutral state. This is an SZ wire twisting method using a pipe-type wire twisting machine, which is characterized by synchronizing each wire.

[Effect]

The wire of a predetermined length that is suddenly required during the rotation of the pipe-type wire twisting machine from the neutral state to the start of rotation is the same length stored on the upstream side of the fixed dividing plate. On the upstream side of the fixed line plate, the same length of the filament is covered by the discharge of the filament, and conversely, the filament that is equal to the predetermined length and suddenly surplus from the start of the reverse rotation to the return to the neutral state is covered by the discharge of the filament. It is absorbed by being stored.

〔Example〕

FIG. 1 shows an example of a device used in the present invention, and the method of the present invention will be explained using this device.

In FIG. 1, the portion downstream from the fixed line plate 6 is omitted, but this downstream portion is the same as that shown in FIG. 2.

A rectangular entrance guide plate 8 is disposed perpendicularly to the running direction of the filament 2 at a position that does not interfere with the running path of the tension member 1,
Here, the same number (4) of guide holes 8 as the striatum 2 are provided at equal intervals.
1 is drilled.

A linear body moving plate 7 having the same shape is provided at a predetermined distance upstream of the entrance guide plate 8 so as to be able to move in parallel and in that parallel state, and the guide hole 8 of the entrance guide plate 7
Striate body insertion holes 74 are bored at four locations corresponding to 1.

Further, a guide roller 75 is provided adjacent to the filament insertion hole 74 so that its groove is in contact with the filament moving plate 7 in the moving direction. The guide roller 75 is provided to prevent the filament 2 from being damaged when the filament 2 is moved.

A rack 71 is fixed to the filament moving plate 7 so as to extend in the moving direction thereof, and a drive pinion 72 that is rotationally driven by a pulse motor 73 is engaged with the rack 71.

The pulse motor 73 rotates forward and backward in response to a signal from a control device (not shown), and moves the linear body moving plate 7 forward and backward by a predetermined distance X, as shown by the broken line in FIG.

As already explained, the timing of movement by the control device is such that the pipe type wire stranding machine moves from the neutral state shown in Fig. 1 to the movable branch plate 4.
When the movable line plate starts rotating, the linear body moving plate 7 returns to the solid line position, and when the movable line plate starts rotating in the opposite direction from the state shown in FIG. It shall be moved in the direction of .

As is clear from the figure, by moving the filament body moving plate 7 by the above-mentioned predetermined distance The filament body 2 is stretched between the two, and the filament body 2 having the above-mentioned total increase in length is stored between the two. Conversely, when the filament moving plate 7 returns to the original solid line position, the filament of the same length is ejected.

The device shown in FIG. 1 is given as an example of an extremely simple mechanism for supplying the same amount of storage to each filamentary body 2 and discharging this storage, and various other mechanisms may be considered.

Although the determination of the above-mentioned predetermined distance X is a very basic algebraic problem, in practical terms, it is better to solve it graphically using actual dimensions as in FIG. 5, and the accuracy is sufficient.

[Effects of the Invention] According to the present invention, by simply adding an extremely simple mechanism, a predetermined length that is suddenly required during the rotation of a pipe-type wire twisting machine from the neutral state to the start of rotation until the start of reverse rotation can be easily fixed. The increase in the length of the striatum is covered by the discharge of the striatum of the same length stored on the upstream side of the fixed line plate, and conversely, the increase in the length of the striatum is covered by the discharge of the striatum of the same length that has been stored on the upstream side of the fixed line plate. Since the excess length of the filament body equal to the length of can be absorbed by storing the same length on the upstream side of the fixed segment plate, the pulsating change in the tension of the filament body in the pipe type stranding machine can be absorbed by This has the effect of producing high-quality stranded wire.

[Brief explanation of the drawing]

Fig. 1 is a simplified perspective view showing an example of a device used to carry out the method of the present invention, Fig. 2 is a side view showing an outline of a pipe-type wire twisting machine, and Fig. 3 is an angle from the state shown in Fig. 2. FIG. 4 is a side view showing the rotated state, FIG. 4 is a plan view of the movable line plate, and FIG. 5 is a calculation diagram showing changes in the length of the filament.

Claims (1)

[Claims] 1. Upstream of the fixed splitting plate (6) of the pipe-type wire twisting machine, a predetermined length of the stored portion is temporarily applied to the plurality of wire bodies (2) running toward the fixed splitting plate (6). A step of holding the wire and a step of discharging the accumulated amount are periodically applied, and the timing of execution of the discharge step and the storage step is reversed from the neutral state of the movable dividing plate (4) of the pipe-type wire twisting machine. An SZ wire twisting method using a pipe-type wire twisting machine, characterized in that the rotation timing up to the start and the return rotation timing from the reverse start state to the neutral state are respectively synchronized.