JPH03192610A - Communication cable - Google Patents

Abstract

PURPOSE:To prevent coated wires from being separated from each other and secure wiring, etc., easily without errors by collecting and twisting a plurality of units, winding a tape around them, and applying a resin coating on the outer side of it. CONSTITUTION:A unit 22 is composed by vertically applying and attaching an adhesive tape 21 of a smaller width than the outer circumferential length of unit main body on the outer side of the unit main body consisting of a plurality of pairs or quads to which a coarse wind tape 13 is applied. A desired number of such units 22 are collected and twisted with each other, a tape 23 of plastic or the like consisting of polyester or the like, is wound around an obtained matter, and its outer side is coated with an outer shell 24 of resin such as polyvinyl chloride or polyethylene. The units 22 are thus prevented from being loosened to separate the core wires from each other, and if they are separated, it is stopped at a predetermined position where the tape 21 is peeled. Terminal connecting wiring, etc., can thus be performed easily without errors.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a communication cable that prevents a large number of insulated wires within the cable from coming apart.

(Prior art) Generally, communication cables are made by twisting two conductors (called core wires) 1 made of copper, aluminum, etc. coated with an electrically insulating coating 2, as shown in Figure 4. As shown in Fig. 5, there is a quad-strand which is made by twisting four strands together, and it is constructed by gathering and twisting many pairs or quads, and some have as many logarithms as 100 or 200 pairs, for example.

Each pair and each quad is marked with a wire number by color or mark, and the wires to the terminals of the exchanger are designated as containers. For example, No. 1 has a core wire with a blue electrical insulation coating and a core wire with a white insulation coating twisted in pairs, No. 2 has yellow and white, No. 3 has green and white, No. 4 has red and white, and so on. Number 5 is purple and white, number 6 is blue and brown, number 7 is yellow and brown, number 8 is green and brown, number 9 is red and brown, number 10 is purple and brown, and so on. , each can can be labeled with a line number. However, if wire numbers are assigned to 100 or 200 pairs based only on the color of the insulator, the number of colors will increase, making it difficult to find a twisted pair core wire that matches the wire number.

Communication cables generally have 8 pairs or 10 pairs as shown in Figure 6.
Each pair is gathered together and twisted together, and this twisted thing is called a unit. In FIG. 6, 11 is a pair or a quad. On the outside of this unit 12, a thread such as a cotton thread or a thin tape 13 having a width of several lllll11 (3 to 5 IIm) such as paper or a plastic tape 13 such as polyvinyl chloride or polyester is attached with a pitch of several cf11 (
5 to 10 cm). This is called rough winding the unit. The color of this rough roll 13 is blue for the first unit, yellow for the second unit, green for the third unit, and green for the fourth unit.
The unit is red, the 5th unit is purple, the 6th unit is blue and white with two threads or tape, the 7th unit is yellow and white, the 8th unit is green and white, the 9th unit is red and white, the The 10 units are marked with purple and white thread or tape to distinguish them from each other. It is possible to assign line numbers to all pairs by setting the first unit's line numbers from 1 to 10, the second unit from 11 to 20, etc., and the 10th unit from 91 to 100. . Such units, for example, the first unit to the tenth unit, are assembled and twisted together, a plastic tape or the like is wrapped thereon to form a cable core, and then a plastic such as polyvinyl chloride, polyethylene, or a natural material such as rubber is placed on top of the cable core. Made of resin, 1cm thick
If it is coated to a certain extent, it will make 100 pairs of communication cables.

(Problems to be Solved by the Invention) When using the above communication cable, for example, when wiring it to a terminal board of a telephone exchange, the terminal board is several meters long and wide. When wiring cables here, several meters of the outer sheath coated with various resins are removed, and each unit is wired to the terminal board and connected to the terminals. At this time, the coarsely wound yarn or tape in each unit becomes loose and the core wires become separated, and core wires with similar colors or marks come out for the same number of units, making it difficult to identify the wire number or causing the core wires to become separated. They come loose and come into contact with equipment, making wiring difficult.

In order to prevent the unit from falling apart when the resin sheath of the cable is removed, a plastic tape such as polyester is attached vertically to the unit, and each coated core wire in the unit is rolled up into a cylindrical shape. This is a cable (tape unit cable) in which the overlapping portions of the side folds of the longitudinally attached tape are adhered with an adhesive or the like to prevent the core wires of the unit from coming loose. However, with this method, the process of wrapping each unit in a cylindrical shape with vertically attached tape and gluing it together is cumbersome and costly, and since the core wires inside the unit are wrapped in a cylindrical shape, the cylindrical tape is removed. It is difficult to do the wiring work because it is troublesome to do so.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a communication cable that improves each of the drawbacks of the above-mentioned coarse winding type and tape unit cables.

[Structure of the Invention] (Means and Effects for Solving the Problems) The present invention provides a structure in which a plurality of insulated wires are roughly wound with thread or tape on the outside of a unit body with a width larger than the outer circumference of the unit body. A communication cable consisting of a unit made by vertically adhering narrow adhesive tape, a plurality of the units assembled and twisted together, wrapped with tape around the outer periphery, and coated with resin on the outside. be.

That is, in the present invention, even if the resin jacket is removed and each unit is separated, the loose winding of the unit is held down by the vertically attached adhesive tape and does not loosen, so the unit loosens and many core wires are separated. In other words, the covered wires do not come apart (and wiring can be easily done without any errors).

(Example) An example of the present invention will be described below with reference to the drawings. 1st
Figure (a) is an explanatory diagram of the configuration of the same embodiment, Figure (b) is its sectional view, Figure 2 (a) is a detailed diagram of the unit configuration of Figure 1,
FIG. 2(b) is a cross-sectional view of the same, and since this is an example in which it corresponds to that of the conventional example, the same reference numerals are used for corresponding parts. In other words, in this configuration, on the outside of the unit body (corresponding to 12 in FIG. 6), a loosely wound tape (or thread or the like) 13 is applied to a plurality of pairs or quads 11. A unit 22 is constructed by adhering a narrow adhesive tape 21 vertically. adhesive tape 2
1 is preferably paper or plastic tape such as vinyl chloride or polyester. Further, the width of the tape 21 may be narrower than the outer circumferential length of the unit 22;
Depending on the outer diameter of the unit 22, it is usually a number nun (2 to 5 m
It should be about a+). Then, a desired number of units 22 are assembled and twisted together, and then a plastic tape 23 made of polyester or the like is wrapped around the outer periphery, and the outside of the tape 23 is covered with a resin jacket 24 made of polyvinyl chloride, polyethylene, or the like. .

FIG. 3 is an explanatory diagram of the cable core manufacturing machine of this embodiment.

That is, each unit manufacturing machine 31 assembles a plurality of pairs or quads 11 and obtains a unit main body to which a loosely wound tape 13 is applied. After that, on the exit side of the unit manufacturing machine 31, the adhesive tape 21 is attached vertically to the unit main body, and each unit 22 thus formed is assembled and twisted together using a twisting machine 32, and the tape winding machine 33 tapes the units 22 together. Wrap 23,
The cable core thus constructed is wound up by a cable core winder 34. In this way, the cable core can be formed all at once.

The communication cable configured as described above has a jacket 24
Even if it is removed and divided into each unit 22, the rough winding of the unit is held down by the vertically attached adhesive tape 21, so
The core wires do not come apart due to loosening of the unit, and only come apart at the required point where the tape 21 is peeled off.

Therefore, wiring and the like of the terminal material can be easily performed without errors. Also, compared to conventional tape unit cables, the tape 21 can be easily removed and installed more easily than the cylindrical tape used to suppress variations in core wires.
It is also quite advantageous in terms of cost.

[Effects of the Invention] As explained above, according to the present invention, it is possible to prevent the core wires of each unit from becoming too loose and making wiring difficult, and it is also easy to separate the core wires to the necessary locations. Therefore, it is possible to provide a loosely wound communication cable that is easy to manufacture and advantageous in terms of cost.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the configuration of an embodiment of the present invention, Fig. 2 is a detailed diagram of a part of the configuration, Fig. 3 is an explanatory diagram of the cable core manufacturing process of Fig. 1, Figs. 4, 5, FIG. 6 is an explanatory diagram of the configuration of pairs, quads, and units. 1... Conductor (core wire), 2... Insulation coating, 11...
pair or quad, 13... rough winding tape, 21...
Vertical adhesive tape, 22...unit, 23...tape, 24...cable jacket (resin).

Claims (1)

[Claims] A unit is formed by longitudinally adhering an adhesive tape narrower than the outer circumference of the unit body to the outside of a unit body made of a plurality of insulated wires roughly wound with thread or tape, and a plurality of the units are assembled. A communication cable characterized by having tape wrapped around the outer periphery of assembled and twisted cables, and a resin coating applied to the outside.