JPS63290638A - Correction device for star twist insulated core - Google Patents

Abstract

PURPOSE:To automatize correction of twist for efficient work by detecting the running speed of a star twist insulated core, inputting it into the driving device of a star twist correction means and driving the star twist correction means corresponding to the running speed. CONSTITUTION:The star twist insulated core 1 drawn out of a supply bobbin makes a round of a sheave 2, separates into each insulated core 4 through a die 3, passes each groove 6 of a correction die 5 and is connected and taken up again by a die 7. A servomotor 9 is connected with the rotating shaft 8 of the sheave 2 and the output of the servomotor 9 is inputted into a servo driver 11 via an arithmetic circuit 10. The servo driver 11 is driven so that the correction die 5 rotates by the value obtained by dividing the running speed of the star twist core 1 by the star twist pitch. The die 7 is provided with a means A for detecting the crest and the bottom of the star twist insulated core, a pulse (a) coming from the means A and a reference pulse (b) are compared by a comparator B, whether a correction has been carried out or not is checked, and if the correction is inadequate, an output C stops the device and emits an alarm.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for straightening twists in star-twisted insulated core wires of communication cables and the like.

[Conventional technology and its problems]

Communication cables are made by twisting insulated core wires with an insulating coating on the conductor in pairs or star twisting, then twisting a large number of these twisted wires together, applying pressure winding or shielding treatment, and then providing an outer jacket. do. In this cable, if the adjacent cores of the insulated core wires that are twisted together are parallel to each other, the transmitted signals will interfere with each other and cause a crosstalk condition. It is twisted together. Therefore, if the pitch of this star twist is disrupted, as a result, adjacent insulated core wires become parallel, resulting in the above-mentioned crosstalk.

For this reason, conventionally, when the twist of star twist breaks down, the twist is corrected before cluster twisting.This correction involves passing the core wire fed out from the supply bobbin through a straightening die, and then manually turning the twist through the straightening die. It is rotated, and the one-twist insulated core wire is advanced according to this rotation to correct the twist.

Since this core wire straightening means rotates the straightening die manually, there are problems such as inefficiency and uneven twisting after straightening, which is an obstacle to labor saving.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide an apparatus that can automatically correct the twist of a foot-twisted insulated core wire without requiring any human intervention.

[Means for achieving the purpose of the invention]

In order to achieve the above object, the present invention includes a means for detecting the running speed of the twisted insulated core wire fed out from the supply bobbin, and a drive means for the Xm correction means to which a signal emitted from the detecting means is input. This driving means operates the leg twist correction means in accordance with the running speed of the star-twisted insulated core wire based on the signal.

[Function] In the straightening device according to the present invention configured as described above, the running speed of the leg-twisted insulated core wire is detected by the running speed detection means, this detection signal is input to the driving means, and the driving means i2! , the straightening means is operated to straighten the twist of the foot-twisted insulated core wire.

〔Example〕

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is the star twisted insulated core wire fed out from the supply bobbin,
After passing around the sheave 2 and separating into individual insulated core wires 4 through the die 3, the wires pass through the grooves 6 of the straightening die 5, and are again converged by the die 7 and wound up.

A servo motor 9 is connected to the rotating shaft 8 of the sheave 2, and the output of the servo motor 9 is input to a servo driver 11 via an arithmetic circuit 10.

Servo driver 11 receives the output of this servo motor S
Ha, star! 2! , the straightening die 5 is driven to rotate at a value obtained by dividing the running speed of the insulated core wire 1 by one twist pitch.

The straightening die 5 is housed in a straightening die holder 13 which has a pulley 12 integrally provided on its outer periphery and is fixed with a fixing napft 14, and the straightening die holder 13 is fitted with a bearing 15.16.
The belt 18 is stretched between the pulley 17 which is supported by the pulley 12 and the drive shaft of the servo driver 11, and the straightening die 5 rotates as described above. Note that F is a frame.

The die 7 is equipped with means A for detecting the peaks and valleys of the foot-twisted insulated core wire after correction, and the pulse a and the reference pulse b (assumed as a normal foot-twisted insulated core wire) emitted from this means A are attached to the die 7. The comparator B compares and erases the pulses (pulses) to check whether the correction has been reliably performed. This check is
If the correction is uncertain, the pulse a is not erased and its output C is used to stop the device and issue an alarm via the relay. In addition, not only when there is an abnormality in one twist, but also when a flaw or kink occurs in the insulated core wire, an abnormality occurs in the pulse a, and a stop/alarm is issued.

As shown in FIG. 3, the detection means A includes a pinch roller 30 that is transferred to the running leg-twisted insulated core wire 1, and this transfer surface is undulated as shown by the solid chain line in the figure based on the fluctuation of the twisted surface. In order to control this undulation, the coil 3 is connected via the lever 31.
After converting the pulse a into an induced voltage of 2 and shaping the pulse caused by this induced voltage into a rectangular wave, this pulse a is compared with a reference pulse b. In other words, the foot twist correction must be done correctly:
Since the twisted surface exhibits regular fluctuations at a certain period, pulse a shows a normal regular waveform and is the same as the waveform of reference pulse b, which indicates normal times. ,
Pulse a exhibits an abnormal waveform and differs from the waveform of reference pulse b, indicating a correction defect.

〔Effect of the invention〕

The present invention is configured as described above! Since the twist of the insulated core wire is automatically corrected, the twist pitch after correction becomes uniform, and work efficiency and cost reduction can be achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an embodiment of the single-twist insulated wire straightening device according to the present invention, FIG. 2 is a perspective view of the straightening die shown in FIG. 1, and FIG. 3 is a straightening degree detection means shown in FIG. 1. FIG. 1...1 twisted insulated core wire, 5...straightening die, 8...rotating shaft, 9...servo motor, 10... Arithmetic circuit, 11... Servo driver, A... Correction degree detection means, B...
...Comparator, a...Detection pulse, b...
...Reference pulse. Patent applicant: TAC Electric Cable Co., Ltd. Agent: Kama 1) Written by: 2qco

Claims (2)

[Claims] (1) Consists of a means for detecting the running speed of the star-twisted insulated core wire fed out from the supply bobbin, and a driving means for the star-twisting correction means to which the signal emitted from this detection means is input, and this driving means allows the signal to be A star-twisted insulated core wire straightening device is characterized in that the star-twisted insulated core wire straightening device is adapted to operate the star-twisted straightening means in accordance with the running speed of the star-twisted insulated core wire. (2) In claim (1), the traveling speed detection means for the star-twisted insulated core wire is constituted by a servo motor connected to the rotating shaft of the sheave around which the fed-out star-twisted insulated core wire revolves. In addition, the star-twisted insulated core is characterized in that the drive means is constituted by a servo driver that receives the output of the servo motor via an arithmetic circuit and rotates the die of the star-twist correction means based on the output. Line correction device.