JPS60177511A - Method of producing cable with shield - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method of manufacturing a shielded cable used for communication cables and connection cables for various electronic devices.

[Prior art and its problems]

Conventionally, in manufacturing the above-mentioned 2-pair to 4-pair shielded cable, first, a shielded twisted pair consisting of two core wires is manufactured. Next, the shielded twisted pair wires are further arranged into a bundle of two to four pairs of required logarithms, and a drain wire or the like is incorporated therein and twisted to produce a shielded cable. For this reason, a process spanning these two stages was required.

FIGS. 1 to 3 show an example of a conventional method for manufacturing a shielded cable using such a two-step process.

FIG. 1 shows the first step of the two-step process described above, and reference numerals 1 and 1 in the figure indicate core wires wound around delivery bobbins la and la. These two core wires 1, 1 are pulled out from the above-mentioned delivery bobbins 1a, 1a, and are respectively drawn out from the branching plate 2a.
is guided through a through hole at a predetermined position and led to the twisting cap 3. This twisted joint mouthpiece 3 has a shape in which a through hole 3a of a predetermined diameter is bored on the central axis of a thick disc body, and the above-mentioned core f
a1.1 are each guided into this through hole 3a and arranged into a bundle. And these core wires 1 arranged in a bundle,
1 are wound up on the bobbin 4 while being twisted together as the bobbin 4 rotates as indicated by the arrow in the figure.

At this time, the core [1
, 1 is wound with a shielding tape 5a such as aluminum mylar tape fed out from a taping machine 5, such as a horizontal winding type, provided between the twisted alloy cap 3 and the bobbin 4.

Ru. From this step 1, the core wires 1, 1 are turned into one shielded twisted pair wire 6 and wound around the bobbin 4, completing the first step. Through this first step, the bobbin 41
The shielded twisted pair wire 6 thus wound is connected to the second wire shown in FIG.
sent to the process.

In FIG. 2, first, the number of bobbins 4 (two in the figure) corresponding to the number of logarithms required for the shielded cable to be manufactured is prepared. Next, the shielded paired twisted wires 6, 6, which have been wound up once, are pulled out from these bobbins 4, 4, and guided to the splitting plate 2b in the same way as the core wires 1, 1 in the above-mentioned first step. , are guided to the through holes 3a of the twisted alloy base 3, respectively. Furthermore, a drain wire 7 and an intervening thread 8 made of polypropylene or the like for filling the gap between the drain wire 7 and the shielded twisted pair wires 6, 6 are further led to the through hole 3a.

In this way, the shielded twisted pairs i6, 6. The drain wire 7 and the intervening thread 8 are twisted together and wound around the winding bobbin 9 as the winding bobbin 9 rotates in the direction of the arrow in the figure. At this time, the shielded twisted wire pair 6 is fed out while being twisted by each bobbin 4, and a tape 10a is wrapped around it by a taping machine 10, thereby forming the shielded cable 11. It is wound onto a winding bobbin 9.

Through the above two-step manufacturing process, the shielded cable 1 having a quadruple structure as shown in FIG. 3 is manufactured.

However, in this manufacturing method, the manufacturing process involves two stages, which requires a considerable amount of time for setup changes, etc., which is a factor that hinders the reduction of manufacturing costs, and also requires a large amount of work space for each process. There is also the hassle of securing such equipment, and improvements are desired.

[Purpose of the invention]

This invention was made in view of the above circumstances.

It is an object of the present invention to provide a method for manufacturing a shielded cable that can streamline the manufacturing process and reduce manufacturing costs in manufacturing the shielded cable.

[Structure of the invention]

The method for manufacturing a shielded cable of the present invention is to pass two core wires through the same through hole in a splitter plate to form a pair of wires, and then wrap a shielding tape around the core wires to form a shielded pair of twisted wires. Then, a plurality of the above-mentioned shielded twisted pair wires are twisted and twisted together.

[Embodiments of the invention]

4 and 5 show an embodiment of the method for manufacturing a shielded cable according to the present invention, and parts common to those in FIGS. 1 to 3 are given the same reference numerals to simplify the explanation. become

In Fig. 4, first, the number of sending bobbins (four in the figure) corresponding to the overall number of wires of the shielded cable to be manufactured is
Prepare a... And these delivery bobbins 1a...
・The core wire 1... wound on these delivery bobbins 1a.
..., and the two core wires 1, 1 are made into a pair and passed through the through holes of the dividing plate 2, respectively. Next, shielding tapes 12a, 12a, such as aluminum mylar tape, are respectively wound around the outer periphery of the pair of cores if, 1 by a taping machine 12.12. The taping machine 12 may be of the horizontal winding type described above, but
A so-called vertically mounted taping machine is more suitable because it does not require rotating the apparatus itself and the apparatus is small. Furthermore, this vertical taping machine makes it possible to obtain cables that are more flexible and bendable.

In this way, each shielding tape 12a.

A pair of wound core wires 1, 12a are made into a shielded pair of twisted wires 6, 6, respectively, and guided to a through hole 3a of a twisted alloy cap 3. The drain wire 7 is also passed through the through hole 3a, and the shielded twisted pair wires 6, 6 and the drain wire 7 are arranged in a bundle and twisted around the winding bobbin 9 as they rotate in the direction of the arrow in the figure. It is made into a shielded cable 13 and wound up.

The shielded cable 13 manufactured in this way is
As shown in Fig. 5, the shielded twisted pairs a6 and 6 are twisted together with their long sides in cross section in contact with each other, producing a cable with a so-called star-shaped quad structure. .

Therefore, according to such a manufacturing method, the following advantages can be obtained.

(a) Shielded cables 13 can be continuously manufactured from 1 m1 of cores in only one process.

(b) There is no need to cut the core wire or change the bobbin setup during the manufacturing process, and the manufacturing time can be significantly shortened.

(c) According to this method, the cable structure is
Since the quad becomes a star-shaped quad, there is no need for intervening yarn or presser tape, reducing material costs.

Furthermore, due to the above reason (c), the cable diameter is also smaller, which is advantageous in terms of wiring space.

In addition, although the above-mentioned example describes the case of manufacturing a 2-pair shielded cable, it is not limited to this.
This method can also be applied to the production of shielded cables with multiple pairs.

Furthermore, in FIG. 4, by providing another dividing plate 2C indicated by a dotted line in the figure upstream of the dividing plate 2, the mutual geometrical positions of the core lines can be maintained even more correctly.

〔Effect of the invention〕

As explained above, the method for manufacturing a shielded cable of the present invention involves passing two core wires through the same through hole of a distribution plate to form a pair of wires, and then wrapping a shielding tape around the core wires to shield them. A plurality of the above-mentioned shielded pair-twisted whips are twisted together using a twisting alloy base. Therefore, according to this manufacturing method, it is possible to achieve significant rationalization of the manufacturing process.

Further, according to this manufacturing method, it is possible to reduce the material cost, and it is possible to reduce the overall manufacturing cost.

[Brief explanation of drawings]

Figures 1 to 3 are for explaining the conventional manufacturing method of shielded cables. Figure 1 is a schematic diagram of the first process. Figure 2 is a schematic diagram of the second process. = figure,
The fpJB diagram is fE! depending on its manufacturing method. The cross-sectional views of the manufactured cable, FIGS. 4 and 5, are for explaining one embodiment of the method for manufacturing a shielded cable of the present invention.1. FIG. 4 is a schematic diagram of the process, and FIG. 5 is a sectional view of a cable manufactured by the manufacturing method of this example. 1...Core wire, 2...Segment plate, 3...
・・・Socket cap, 6...Shielded twisted pair wire, 12
a... Shielding tape.

Claims (1)

[Claims] The two core wires are made to pass through the same through-hole in the splitting plate to form a pair of wires, and then a shielding tape is wound around this to form a shielded pair of wires, and then the shielded pair of twisted wires is formed. A method for manufacturing a shielded cable, characterized in that a plurality of cables are twisted together using a twisted alloy base.