JPS5924089Y2 - Communication cable manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an advantageous apparatus for manufacturing communication cables, particularly small-sized paired communication cables.

In order to efficiently manufacture communication cables, we simultaneously perform a series of steps such as twisting multiple insulated wire cores into pairs at the same pitch, then assembling these pairs in SZ, forming the upper tape vertically, and applying a sheath. There is a technique to do it.

Conventionally, in order to simplify the equipment, in this technology, for example, a feeder of a cut-twisting device was used to attach a bobbin around which the insulated wire core was wound, and then the other insulated wire core of the pair was The fibers are sent out from the rear of the twisting device, guided to the flyer of the quad twisting device, and twisted in pairs at the same pitch by rotating this flyer.

Thereafter, these pairs are introduced into a reversing head for SZ collection, and the pitch of each village is randomized and assembled by rotating the reversing head left and right.

If a plurality of pairs with the same pitch were assembled in the same direction, the capacitive coupling value between the pairs would become extremely large, resulting in a cable that could not be put to practical use, but the above conventional technology collects them in SZ. This randomizes the twist pitch and compensates for problems in characteristics.

However, when the conductor size is small, this conventional manufacturing technology
For example, when the conductor size is 4 mm or 0.5 mm, it is easy to randomize the pitch, but when the conductor size is large, for example, 9.55 m
m and 9.9 mm, the rigidity of the insulated wire core is large,
If only the SZ set was used, it would be difficult to randomize the twist pair pitch, and the electrostatic coupling value would become large, making it impractical for practical use.

Unless this drawback is resolved, there will be a problem that the applicable size will be limited.

SUMMARY OF THE INVENTION An object of the present invention is to provide an improved communication cable manufacturing apparatus that eliminates the drawbacks of the prior art described above and can stabilize capacitive coupling characteristics regardless of the size of the conductor.

That is, the gist of the present invention is that a random head is provided after a pair twisting device that twists pairs at the same pitch, and each village is rotated left and right at a different number of rotations to randomize the pitch, and then SZ assembly and sheathing are performed. The purpose is to perform extrusion.

Next, one embodiment of the manufacturing apparatus of the present invention will be further described with reference to the accompanying drawings.

Reference numeral 1 denotes a pair twisting machine using a feeder of a quad twisting device, and a bobbin 4 around which an insulated wire core 2 is wound is attached.

On the other hand, an insulated wire core 2' forming a pair with this insulated wire core 2 is sent out from a bobbin 3' provided at the rear of the pair twisting machine 1, and introduced into a flyer 4 of the pair twisting machine 1.

The flyer 4 rotates around the bobbin 3, and therefore, at the tip of the flyer 4, the insulated wire core 2' is twisted in pairs so as to wrap around the wire core 2.

In this case, for example, by making the tension of the wire core 2 smaller than the tension of the wire core 2', the shape changes from a shape in which the wire core 2' is wrapped around the wire core 2 to a shape in which both are twisted in pairs evenly. It is something.

The plurality of twisted wire cores twisted at the same pitch by the twisting machine 1 in this manner are introduced into the random head 5 one by one, and the twisting pitches are randomized.

The random head 5 may be of any type, such as a pulley, guide roll, or belt roller, and is rotated by a motor.

In this case, the motor is equipped with a repetitive motion mechanism such as a rack and pinion, and rotates from side to side while holding the pair.

The rotation of the random head 5 must be adjusted to a different rotation speed and a different reversal cycle for each sealed can.

The random head 5 may be rotated separately for each sealed can, or the same head may have a structure in which multiple layers of batten boards with different rotational speeds are connected, allowing a plurality of pairs to pass through. Also good.

The pairs whose twist pitch has been randomized by the random head 5 in this way are then transferred to the batten 6 and the reversing head 7 for SZ gathering.
The material is introduced into the SZ assembly, and is further subjected to press winding by the SZ collection presser winding device 8.

Next, the SZ collection three-circle tape 10 is vertically spliced using a vertical splicing forming device 11,
Furthermore, a sheath is applied to the outermost periphery by an extruder 12, and the production of the communication cable is completed.

According to the manufacturing apparatus of this embodiment constructed in this manner, the existence of the random head randomizes the twist pair pitch, so that the electrical characteristics are excellent.

In addition, cables can be manufactured on one production line by using the feeding machine of the conventional quad twisting device as is.
This improves economic efficiency.

As explained above, according to the present invention, it is possible to manufacture an excellent communication cable with stable capacitive coupling characteristics regardless of the size of the conductor, and its practical value is great.

[Brief explanation of the drawing]

The accompanying drawings are explanatory diagrams showing one embodiment of the manufacturing apparatus of the present invention. 1: Twisting device, 2.2': Insulated wire core, 3.3' Ni drum, 4: Flyer, 5: Random head, 6: Batten, 7
: Reversing head for SZZ combining, 8: SZ gathering pressing and winding device, 9: SZ gathering and gathering 3-loop forming device, 12: Extruder.

Claims (1)

[Scope of utility model registration request] A pair twisting device that twists multiple insulated wire cores in pairs at the same pitch, a random head that randomizes the pitch by twisting each village left and right, and an SZ that gathers each village while twisting it SZ.
1. A communication cable manufacturing device comprising a gathering device and an extruder for applying a sheath to the outer periphery of the gathered wire cores.