JPS5826125B2 - Bulk insulation coated cable manufacturing equipment - Google Patents

Description

[Detailed description of the invention] TECHNICAL FIELD The present invention relates to an apparatus for manufacturing a cable that is insulated all at once.

Conventional balanced cables are manufactured by first covering one conductor with an insulator to form a core wire, and then twisting two or four core wires together to produce a pair or quad cable.

Therefore, in this case, an insulation process and a twisting process are required, which limits the productivity improvement.

On the other hand, cable loss is approximately determined by the distance between conductors in the same pair or in the same quad, and does not change significantly even if conductors of other pairs or quads approach each other.

Therefore, the insulating layer on the outer side of the conductors of a pair or quad can be thin, and by making it thinner, the outer diameter of the pair or quad can be reduced and the number of cables accommodated can be increased accordingly.

However, as in the past, each conductor was coated with an insulator,
When twisting these together to form a pair or a quad,
The distance between conductors in the same pair or quad is determined by the thickness of the insulator coated on each conductor, and since the insulator is coated around the conductor with a constant thickness, The drawback is that the outer insulating layer cannot be made thinner.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a device for manufacturing a cable with all-in-one insulation, which can improve production efficiency and at the same time reduce the size of the device itself. A drum-shaped flyer including flyer shafts facing each other, a floating frame provided inside the flyer so as to be rotatable with respect to the flyer, and a feeding bobbin made of a linear insulator disposed on the floating frame. ,
Similarly, there is a wire feeding device disposed on the floating frame for feeding out the required number of core wires, a branching plate disposed on the floating frame, and a wire insulator and the core wire via the branching plate. It is characterized in that it has a twisting die that is integrated and an insulation coating device that is arranged downstream of the twisting die.

Embodiments of the present invention will be described in detail below based on the drawings.

In Fig. 1, 1 is the base, 2ay 2b is the flyer shaft,
3 is a flyer, 4 is a floating frame, 5 is a feeding bobbin for linear insulators, 6 is a core wire feeding device, 7 is a wire distribution plate, 8 is a twisting die, 9, 10. 1L12 is a guide roller, 13 is an insulation coating device, 14 is a take-up device, 15 is a winding device, 16,
17 is a connecting rod, 18 is a linear insulator, 19 is a bare conductor or core wire, and 20 is a motor.

As shown in the figure, the base 1 includes a hollow fryer shaft 2a,
2b are rotatably supported facing each other.

The fryer shafts 2a and 2b are connected by a hollow connecting rod 16 and a connecting rod 17 to form the fryer 3 as a whole.

A floating frame 4 is rotatably supported inside the fryer 3.

Arranged on this floating frame 4 are a wire insulator delivery bobbin 5 wound with a wire insulator 18 manufactured by extrusion or the like in advance, a core wire delivery device 6, a dividing plate 7, and a twisting die 8. has been done.

As shown in FIG. 2, the floating frame 4 can be made small if a single wire feeding bobbin in which the required number of wires 19 are wound and stored in parallel is used as the wire feeding device 6 at this time.

In this case, if the intended communication cable is a quad, four core wires, or if it is a pair, two core wires may be wound in parallel on one bobbin.

The flyer shafts 2a and 2b are provided with guide rollers 9 and 9, respectively.
12 is rotatably provided so that the outer circumference of the groove is in contact with the center line of the flyer shafts 2a, 2b, and guide rollers 10,
11 are provided at both ends of the hollow connecting rod 16.

Outside the flyer 3 and downstream of the twisting die 8, an insulator coating device 13, a take-off device 14, and a winding device 15 are provided in this order.

At this time, the insulation coating device 13 includes an insulation extrusion device,
A device can be used to wrap the insulation tape.

Next, the operation of the device of this embodiment will be explained.

The linear insulator 18 fed out from the feeding bobbin 5 of the linear insulator on the floating frame 4 and the bare conductor or core wire 19 fed out from the core wire feeding device 6, for example in the illustrated case, are twisted together in the twisting die 8. join together.

This state is enlarged and shown in FIG.

In this case, as the linear insulator 18, as shown in FIG.
If a cross-sectional shape having a groove 18ak is used, each bare conductor or core wire 19 is fitted into the groove 18a and attached vertically, and if a cross-sectional shape as shown in FIG. A bare conductor or core wire 19 is placed vertically in each quadrant.

The wire insulators 18 and bare conductors or core wires 19 that are joined at the twisting die 8 are transferred to a flyer 3 by a motor 20.
As a result of the rotation, the twisted wire is twisted twice, once between the die 8 and the guide roller 9, and once between the guide roller 12 and the external insulating device 13, resulting in the twisted wire shown in section A in FIG. This is then covered with the outer sheath 21 in the insulation sheathing device 13 to form a communication cable as shown in cross section in FIGS. 6 and 7, and is wound up in the winding device 15.

With the device of this embodiment, a pair can also be formed as shown in FIG.

Furthermore, as shown in FIGS. 10 and 11, although the above explanation is based on the case where a single linear insulator 18 is used, a plurality of linear insulators 18 are fed out in parallel. Bobbin 5
The wire insulators 18 fed out from the bobbin 5 are bundled and twisted into the grooves formed between the wire insulators 18, and a bare conductor or core wire 19 is vertically attached using the die 8 to form a communication cable. can be manufactured.

FIGS. 12 and 13 are a sectional view and a front view, respectively, showing an embodiment of the dividing plate 7 of the apparatus of the present invention.

In the figure, 22 is a twisting roller, 23 is a hollow shaft, 24 is a pulley, 25 is a belt, 26 is a motor, and 27 is a guide roller.

This branch plate 7 is capable of twisting each of the bare conductors or the core wires 19, and operates as follows.

That is, a hollow shaft 23 is rotatably provided on the fixed branching plate 7, a pulley 24 is fixed to the hollow shaft 23, and a twisting roller 22 is mounted as shown in the figure. installed on.

The bare conductor or core wire 19 sent out from the wire feeding device 6 is guided by a guide roller 27 and inserted into the hollow shaft 23, and after passing through the hollow shaft 23, it is wound once around the twisting roller 22, and then twisted. It is inserted into the die 8.

At this time, the hollow shaft 23 is rotated by a motor 26 through a pulley 24 and a belt 25, and the twisting roller 22 also rotates around the axis of the hollow shaft 23 accordingly.

By this rotation of the twisting rollers 22, twist is applied to the bare conductor or core wire 19 passing through the branching plate 7.

At this time, the rotation direction of the hollow shaft 23 changes periodically.

In this way, even if the cross-sectional shape of the conductor is deformed or the conductor position within the core wire is eccentric, the deviation can be dispersed in the longitudinal direction, improving the electrical characteristics of the communication cable. Can be done.

As specifically explained above in conjunction with the embodiments, according to the present invention, the twisting process and the insulation coating process are integrated, and the production efficiency of communication cables can be improved.

In particular, since it is a twice-twisted type, the twisting efficiency is high and the manufacturing speed of communication cables is increased.

In addition, since the thickness of the outer coating can be adjusted using the insulation coating device, it is possible to manufacture a cable as shown in Figure 9a, which has a smaller outer diameter than the conventional cable shown in Figure 9. Therefore, the number of cables accommodated can be increased.

Furthermore, since a required number of core wires are wound and stored in parallel as a wire delivery bobbin, only one delivery bobbin is required, which has the advantage that floating frame fryers and the like can be made smaller.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a front view of a bobbin in which a plurality of bare conductors or core wires are wound in parallel;
FIG. 3 is an enlarged view of a twisted portion of a bare conductor or core wire and a linear insulator, FIGS. 4 and 5 are cross-sectional views of an example of a linear insulator used in the above embodiment, and FIG. 6 and FIG. 7 is a cross-sectional view of an example of a quad manufactured by the apparatus of the embodiment,
FIG. 8 is a cross-sectional view of an example of the pair, FIG. 9a is a cross-sectional view of an example of the quad, FIG. 9 is a cross-sectional view of a conventional quad,
FIG. 10 is an enlarged view of a twisted portion of a bare conductor or a core wire and a linear insulator, FIG. 11 is a cross-sectional view of an example of a quad manufactured by the apparatus of the embodiment, and FIG. 12 is a diagram of the embodiment FIG. 13 is a sectional view of the dividing plate portion of the device, and a front view thereof. In the drawings, 2a and 2b are flyer shafts, 3 is a flyer, 4 is a floating frame, 5 is a feeding bobbin for linear insulators, 6 is a core wire feeding device, 8 is a twisting die, 13 is an insulation coating device, 1
4 is a take-up device, 15 is a winding device, 18 is a linear insulator, 1
9 is a bare conductor or a core wire.

Claims (1)

[Scope of Claims] 1 A flyer including a hollow flyer shaft rotatably provided coaxially opposite to each other; a floating frame provided inside the flyer so as to be rotatable with respect to the flyer; and on the floating frame. a wire insulator delivery bobbin disposed on the floating frame; a single core wire delivery bobbin disposed on the floating frame and wound with a required number of core wires in parallel; and a branch wire disposed on the floating frame. 1. An apparatus for manufacturing a bulk insulation-coated cable, comprising: a plate, a twisting die, and an insulation coating device provided downstream of the twisting die.