JP2001338535A - Multipaired communication cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multipaired communication cable that enables the identification of paired strands among collecting units regardless of the existence of a sheath or a coarsely wound tape by using an inclusion arranged at the center of a collecting unit, and that eliminates a printing process at the time of manufacturing the collecting units and difficult and frequent exchange works of coarsely wound tapes. SOLUTION: A multipaired communication cable is made by gathering plural collecting units 30 that are made by gathering plural paired strands 23 with an inclusion 24 as a center and its periphery is coated in a lump. The inclusion 24 in a collecting unit 30 can be identified visually from the inclusions 24 in another collecting units 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-pair communication cable, and more particularly to a multi-pair communication cable, in which a plurality of collective units are assembled around a pair of twisted wires, and the outer periphery thereof is collectively covered. For multi-pair communication cables.

[0002]

2. Description of the Related Art Conventionally, as a cable for data transmission (LAN), a twisted pair wire 2a in which two insulated core wires 1a and 1b provided with an insulating coating on the outer periphery of a conductor as shown in FIG. Twist a plurality of strands, and roughly wrap tape 3a around the circumference
And a sheath 4a are sequentially applied to form a collective unit 5a. Further, a multi-pair communication cable having a structure in which a plurality of the collective units 5a are twisted around the interposition 6 and the outer periphery thereof is collectively covered 6 is used. I have.

In such a multi-pair communication cable,
In order to facilitate the wiring work, as shown in FIG. 7, one insulating core wire 1a of each twisted pair wire 2a is provided with an insulating coating 11a colored in a different color such as blue, orange, green, and brown. By attaching the colored line 12 of the same color as the insulating coating 11a of the paired insulating core 1a to the insulating coating 11b of the other insulating core 1b, four pairs of twisted pair wires 2a, 2a in the same collective unit 5a. ,.., And each of the insulated core wires 1a, 2a, 2a,.
The combination of 1b is clarified.

However, in this case, although it is possible to distinguish between the twisted pair wires 2a, 2a,... In the same collective unit 5a, the twisted pair wires 2a, 2a, 2
are basically the same, it is not possible to identify which of the collective units 5a the twisted pair wires 2a, 2a,... between different collective units 5a. As in the case of the characteristic test, there is a problem that a trouble occurs when an operation that requires identification of the twisted pair wires 2a, 2a,...

Therefore, conventionally, a different collective unit 5a
.. Between the paired twisted wires 2a, 2a,... So as to be able to identify which of the collective units 5a. , 3 ………)
Alternatively, a colored tape is used as the tape 3a that is roughly wound around the assembled twisted pair wire 2a, and the color is used as the assembly unit 5a.
Measures have been taken, such as changing every one.

However, the method of printing an index for identification on the surface of the sheath 4a of the collecting unit 5a requires a step of printing the index on the sheath 4a when the collecting unit 5a is manufactured. Sheath 4 on the outer circumference
There is a problem that it cannot be applied to a so-called sheathless type cable which does not have a.

In the method using a colored tape for the coarsely wound tape 3a, there is a problem that the operation of exchanging the tape for changing colors is complicated when manufacturing the collective unit 5a. In other words, the bobbin for the coarse winding tape is mounted on a rotating part that circulates around the production line of the collective unit 5a. However, such a rotating part is covered with a protective net or the like for safety measures. Is not easy, and it is necessary to perform such a difficult operation for each color change. Further, similarly to the case of the sheath 4a, there is a problem that it cannot be applied to a cable of a type that does not have the coarsely wound tape 3a on the outer periphery of the twisted pair wire 2a.

[0008]

As described above, in the conventional multi-pair communication cable, in order to enable the identification of the twisted pair wires between different collective units, the surface of the sheath of the collective unit is used for identification. Measures such as printing the index or using colored tape for the coarse winding tape have been adopted, but the process of printing the index at the time of manufacturing the collective unit is necessary. , And cannot be applied to a sheathless cable or a cable without a coarsely wound tape.

On the other hand, in recent years, in a multi-pair communication cable,
In order to arrange the twisted pair wires in the collective unit at the proper position,
An arrangement in which a string-like body or a cross-shaped spacer is provided at the center of the collective unit has been proposed, and a part thereof has already been put into practical use. The cruciform spacer can maintain a constant distance between adjacent twisted pair wires, and is therefore used particularly for cables requiring strict transmission characteristics.

If such an intervention can be used for identification of the insulated core wire between the collective units, it becomes possible to cope with a sheathless cable or a cable without a coarsely wound tape. It is considered to be extremely useful for the solution, but such a thing has not yet been obtained.

The present invention has been made in view of such a situation, and utilizes an interposition disposed at the center of a collective unit to perform twisting between different collective units irrespective of the presence or absence of a sheath or a roughly wound tape. It is an object of the present invention to provide a multi-pair communication cable that enables line identification and that can omit a printing process and a difficult frequent replacement of a coarsely wound tape at the time of manufacturing a collective unit.

[0012]

In order to achieve the above object, a multi-pair communication cable according to the present invention as set forth in claim 1 comprises a plurality of aggregate units each having a plurality of twisted pairs interposed therebetween. Further, in the multi-pair communication cable whose outer periphery is collectively covered, the interposition of each set unit can be visually distinguished from the interposition of another set unit.

The multi-pair communication cable of the present invention described in claim 2 is characterized in that the intervening units are colored in different colors.

According to a third aspect of the present invention, there is provided the multi-pair communication cable according to the present invention, wherein lines of different colors are provided on the surface of the intervening unit.

According to a fourth aspect of the present invention, there is provided the multi-pair communication cable according to the present invention, wherein the interposition of each of the assembly units has a partition extending radially from the center thereof and separating the adjacent twisted pair wires from each other. It is a feature.

In the multi-pair communication cable of the present invention, the interposition of each collective unit can be visually distinguished from the intervening of other collective units. In addition, since it is possible to identify the twisted pair wires between different collective units, and it is not necessary to provide a new component for identification, it is possible to suppress the cost increase of the product as low as possible.

Further, since the interposition can be configured to be visually identifiable in advance at the time of manufacturing the interposition, the printing process in the conventional collective unit manufacturing line can be omitted.

Further, in this case, although the replacement of the intervention in the collective unit manufacturing line is required at the time of the color change, the replacement place is not the rotating part which circulates around the cable manufacturing line like the rough winding tape. The operation is much easier than when replacing the coarsely wound tape.

Further, lines of different colors may be provided on the intervening surface of each assembly unit. In this case, in the production line of the collective unit, a line providing means such as a coloring pen for attaching a line to the surface of the interposed portion to be fed is arranged upstream of the collecting portion for collecting the twisted pair around the interposition. By performing color change such as, the intervention of the same color can be used,
It eliminates the need for an intervening replacement work for color change.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing an embodiment of the multi-pair communication cable of the present invention, and FIG. 2 is a cross-sectional view showing the configuration of the collective unit shown in FIG. 1 in more detail.

As shown in FIGS. 1 and 2, this multi-pair communication cable includes a plurality of twisted pair wires 23 in which two insulated core wires 22 each having an insulating coating 21 on the outer periphery of a conductor 20 and a plurality of interposed wires 24. The assembly is formed by twisting around the center, and the sheath 25 is covered on the outside to form an assembly unit 30. Further, a plurality of the assembly units 30 are assembled by twisting around the interposition 40, and the like. Collective coating on outer circumference 5
0 is applied.

In each assembly unit 30, each twisted pair 2
The insulating coating 21a of one of the insulated core wires 22a is blue,
A colored line 26 of the same color as the insulating coating 21a of the paired insulating core 22a is attached to the insulating coating 21b of the other insulating core 22b, which is colored in a different color such as orange, green, and brown. , Thereby enabling discrimination between the twisted pair wires 23, 23,... In each of the collective units 5a.
The insulated core wires 22, 22 constituting each twisted pair wire 23, 23,.
The combination is clear.

Further, the interposition 24 in each assembly unit 30 is colored in different colors that are visually distinguishable from each other, such as red, blue, green,. , 23,... Can be distinguished between the collective units 30 as well.

In the multi-pair communication cable configured as described above, the twisted pair wires 23 can be identified between the collective units 30, and work can be performed smoothly without erroneous connection at the time of connector connection or characteristic test. Can proceed.

Further, since the color can be identified by the color of the interposition 24, the conventional printing process for identification of the collective unit 30 on the manufacturing line can be omitted. 24 different interventions
However, since the drum around which the interposition 24 is wound is not mounted on a rotating part covered with a protective net or the like as in the case of the coarse winding tape, the replacement operation is far more complicated than the replacement of the coarse winding tape. Can be easily performed.

Further, as shown in FIG. 3 in which the same reference numerals are given to the parts common to FIG. 1 as well as the cable in which the coarsely wound tape is not provided as in this example, Even if a sheathless type cable is not provided with a sheath, a pair of twisted wires 23 between each collective unit 30 can be provided without providing a new component for identification.
Can be identified. Also in this embodiment, it is not necessary to provide a new component for identification, so that an increase in product cost can be suppressed as low as possible.

In the present invention, it is sufficient that the interposition 24 is configured so as to be visually identifiable. Therefore, the entirety may be colored as in the above-described example. One or several extending colored lines may be provided, or an identification mark such as a number may be printed on the surface. When an identification mark such as a colored line or a number is attached, it is desirable that the mark can be confirmed from any direction at any position. In the case of adding a coloring line, in the production line of the collecting unit, on the upstream side of the collecting portion for collecting the twisted pair around the interposition, a line providing means such as a coloring pen for applying a line to the surface of the interposed union is arranged, By performing the color change of the coloring pen or the like, the intervention of the same color can be used, so that the work of replacing the intervention due to the color change becomes unnecessary.

Next, another embodiment of the multi-pair communication cable of the present invention will be described.

This embodiment is a communication cable used in the case where particularly strict transmission characteristics are required, in which the interposition is constituted by a spacer type interposition in the above-described embodiment.

FIG. 4 is a cross-sectional view showing the structure of the collective unit 30 according to the present embodiment, and the same reference numerals are given to parts common to FIGS.

In FIG. 4, at the center of the twisted pair wire 23, a cross-shaped spacer-type interposition 2 having a partition wall 26a extending radially from the center and separating adjacent twisted pair wires 23 from each other.
6 are provided. Then, similarly to the above-described interposition 24, the spacer-type interposition 26 is colored in a different color from the other spacer-type interpositions 26 so that they can be visually identified.

In the multi-pair communication cable of the present embodiment, similarly to the above-described embodiment, the spacer-type interposition 26 in each of the collective units 30 is colored in different colors that can be distinguished from each other. Twisted Wire 23
Can be identified, and work can be performed smoothly without erroneous connection in connector connection, characteristic test, and the like.

Further, since the color can be identified by the color of the spacer-type interposition 26, a conventional printing process for identification on the production line of the collective unit 30 can be omitted. Although the color change is required, the replacement operation can be performed much more easily than the replacement of the coarsely wound tape.

Further, the present invention can be applied not only to a cable having no wrapped tape but also to a sheathless type cable, and to provide an insulated core between the collective units 30 without providing a new component for identification. 22 can be identified, and the cost increase of the product can be suppressed as low as possible.

In this embodiment, as in the case of the above-described embodiment, the spacer type interposition 26 may be configured to be visually identifiable. Therefore, as in this example, the entire spacer is colored. 5, and extends in the longitudinal direction on the surface of the top of the partition wall 26a as shown in FIG.
One or several colored lines 27 may be provided, or an identification mark such as a number may be printed on the surface. The position where the identification mark such as the coloring line 27 or the number is attached is preferably the top of the partition 26a for ease of identification, but may be the side surface or the base. When adding a coloring line, as in the case of the above-described embodiment, in the production line of the collective unit,
On the upstream side of the gathering part where the twisted pair wires are gathered around the interposition, a line providing means such as a coloring pen for attaching a line to the surface of the interposed unreeling is arranged, and by changing the color of the coloring pen or the like, the same is performed. Since the intervention of the color can be used, there is no need to replace the intervention due to the color change.

The present invention is not limited to the above-described embodiment, but includes a unit in which a collective covering 50 is provided on the outer periphery of a collective unit 30 via a rough-wound tape layer, and It can be widely applied to various multi-pair communication cables, for example, those in which only a coarsely wound tape is wound.

[0038]

As described above, according to the multi-pair communication cable of the present invention, the intervention provided at the center of the collective unit can be visually identified. , And it is possible to identify a twisted pair wire between each of the collective units. Moreover, since it is not necessary to provide a new component for identification, the cost increase of the product can be suppressed as low as possible. Further, the printing process in the collective unit manufacturing line can be omitted. Furthermore, when using a pre-colored intervention,
It is necessary to change the interposition at the time of color change in the production of the collective unit, but the bobbin that stores the interposition is not attached to the rotating part that rotates around the production line as in the case of the conventional rough wound tape. Since there is no replacement, the replacement is easy.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a multi-pair communication cable of the present invention.

FIG. 2 is a sectional view showing the configuration of the collective unit shown in FIG.

FIG. 3 is a sectional view showing another embodiment of the multi-pair communication cable of the present invention.

FIG. 4 is a cross-sectional view illustrating a configuration of a collective unit in another embodiment of the multi-pair communication cable of the present invention.

FIG. 5 is a sectional view showing a modification of the collective unit shown in FIG. 4;

FIG. 6 is a sectional view showing an example of a conventional multi-pair communication cable.

FIG. 7 is a sectional view showing the configuration of the collective unit shown in FIG. 6 in more detail;

[Explanation of symbols]

 22 ... insulated core wire 23 ... twisted pair wire 24 ... interposed 26 ... spacer type interposed 26a ... partition wall 27 ... colored line 30 ... unit 50 ... collectively Coating

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masataka Ushiki 2-1-1, Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture F-term in Showa Electric Wire & Cable Co., Ltd.

Claims (4)

[Claims] 1. A multi-pair communication cable in which a plurality of aggregate units are assembled around a pair of twisted wires, and the outer periphery of the aggregate unit is collectively coated. A multi-pair communication cable characterized in that it can be visually distinguished from the intervention of a unit. 2. The multi-pair communication cable according to claim 1, wherein the intervening portions of the collective units are colored in different colors. 3. The multi-pair communication cable according to claim 1, wherein lines of different colors are provided on the intervening surface of each of the collective units. 4. The interposition of each of the collecting units has a partition extending radially from the center thereof and separating the adjacent twisted pair wires from each other. Multi-pair communication cable.