JPH11211946A - Optical power combined cable for prefabrication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily deal with the case of making a communication line optical in future by assembling a power line and an optical unit and simultaneously coating them. SOLUTION: Concerning a combined cable 1A, for example, these power lines 2 are assembled and twisted at the center, optical units 3A having six cores are arranged one by one at three gaps mutually between the power lines 2 on the outer surface of the assembly of these power lines 2 so as to provide 18 cores in total, and these six wires are twisted. While having the outer diameter of about 13 mm, the power line 2 is constituted by providing a coating layer 2b composed of plastic such as polyvinyl chloride on a conductor 2a having the conductor area of 2.2 mm<2> while twisting seven copper wires having the outer diameter of 2.0 mm, for example. The optical unit 3A is constituted by twisting six optical cord 3c with one optical fiber around an anti-tension wire 3d and further being simultaneously coated with a batchwise coating layer 3f composed of plastic such as polyvinyl chloride or polyethylene.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical power composite cable, and more particularly to a power supply cable laid in an apartment house or the like, which is branched to a subscriber when optical communication is required later. It is suitable for a prefabricated optical power composite cable capable of providing an optical fiber.

[0002]

2. Description of the Related Art Conventionally, metal communication cables used in apartment houses and the like need to be laid separately from power cables, which requires much time and labor, and the space required for laying is large. I was In recent years, it has been considered that the communication line to be supplied to ordinary households is converted to light with the increase in communication information. However, in general apartment buildings, the installation space such as cables must be changed on the way. Therefore, there is a problem that if the optical cable is used in the future, an optical cable cannot be laid later.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and even in the case where a communication line is to be opticalized in the future, it can be easily provided without particularly securing a laying space therefor. It is an object of the present invention to provide a prefabricated optical power composite cable which can be adapted to opticalization. It is still another object of the present invention to provide a prefabricated optical power composite cable that can reduce a space for laying a power cable and an optical cable.

[0004]

According to a first aspect of the present invention, there is provided a prefabricated prefabricated power supply system comprising a power line and an optical unit which are collectively coated. An optical power composite cable is proposed.
According to a second aspect of the present invention, there is provided a prefabricated optical power composite, wherein a power line accommodating portion accommodating a power line and an optical unit accommodating portion accommodating an optical unit are connected and integrated by a connecting portion. Suggest a cable.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A prefabricated optical power composite cable (hereinafter abbreviated as a composite cable) of the present invention will be described with reference to two examples. FIG. 1 shows a composite cable 1 according to a first embodiment of the present invention.
FIG. 2A is a sectional view. In the figure, reference numeral 2 denotes a power line, and 3A denotes an optical unit. In this example, the power line 2 has a coating layer 2b made of plastic such as polyvinyl chloride provided on a conductor 2a having a conductor area of 22 mm ^{2 formed} by twisting seven copper wires having an outer diameter of 2.0 mm. It has a configured outer diameter of about 13 mm. The optical unit 3A is configured such that six optical cords 3c are twisted around a tensile strength wire 3d and are collectively covered with a collective covering layer 3f made of plastic such as polyvinyl chloride or polyethylene.

The optical cord 3c is formed on a bare optical fiber 3a having an outer diameter of 250 μm, which is formed by coating a plastic made of ultraviolet curing resin or silicone resin on a normal optical fiber having an outer diameter of 125 μm. In addition, an outer diameter of about 2 mm is formed by forming a coating layer 3b made of nylon or the like with a plurality of tensile strength members such as aramid fibers added vertically. The tensile strength wire 3d is made of steel wire or the like and has an outer diameter of about 2 mm. The outer diameter of the optical unit 3A is about 6 mm.

In the composite cable 1A, three power lines 2 are collected and twisted at the center thereof, and three power lines 2 formed between the power lines 2 on the outer surface of the aggregate of the power lines 2 are formed. In the gap (recess), six optical units 3A are arranged one by one so as to have a total of 18 cores, and these six optical units are twisted. The outer diameter of the composite cable 1A is 28 mm. The composite cable 1A includes, for example, the power line 2 and the optical unit 3
It is manufactured by twisting A.

In this example, the size and number of power lines 2
The number of optical fibers is set so as to correspond to a power cable or a communication cable usually laid in an apartment house. Further, the outer diameter of the optical unit 3A disposed in the gap between the power lines 2 is designed to be substantially within the circumscribed circle of the aggregate of the power lines 2 in the cross section of the aggregate of the three power lines 2. ing. Therefore, the outer diameter of the composite cable 1A is
The outer diameter of the aggregate of the power lines 2, that is, the outer diameter of the power cable laid in the conventional apartment house can be substantially the same.

The composite cable 1A is laid in, for example, an apartment house, and when it becomes necessary later, the optical unit 3A is taken out at the terminal or in the middle, and the optical cord 3c is branched therefrom to be used by the subscriber. To supply.

When the composite cable 1A is laid, the composite cable 1A can be attached to an attachment surface, for example, as shown in FIG. In the figure, reference numeral 5 denotes a fixture, which is a rectangular plate made of metal or the like, which is formed by being curved in a semicircular shape near the center in the long side direction. It has a concave portion 5a and flat portions 5b at both ends. Then, the composite cable 1A is disposed in the concave portion 5a, and the flat portions 5b at both ends are fixed to the mounting surface 6 with screws 5c so that the composite cable 1A is sandwiched between the concave portion 5a and the mounting surface 6. By attaching, composite cable 1
A can be fixed.

The composite cable 1A has a structure in which the power line 2 and the optical unit 3A are integrated and serves as a power cable and a communication cable.
The power cable and the communication cable, which have conventionally been separately provided, can be laid at once. Further, the outer diameter can be made approximately the same as that of a conventional power cable, and space can be saved. In particular, it is suitable as a prefabricated optical power composite cable used for an apartment house or the like where improvement in space efficiency is required.

(Second Example) FIG. 2 is a sectional view showing a composite cable 1B according to a second example of the present invention. The same components as those shown in FIG. 1 are denoted by the same reference numerals. In the figure, reference numeral 2 denotes a power line, and three power lines 2 are twisted to form an aggregate. The aggregate is covered with a substantially gourd-shaped collective coating layer 4B made of plastic such as polyvinyl chloride. Have been.

The collective coating layer 4B has a large-diameter power line housing 4a having a circular cross section and a small-diameter optical unit housing 4b.
And a connecting portion 4c having a rectangular cross section for connecting these components. The assembly made up of the power lines 2 is located at the center of the power line accommodating portion 4a. The connecting part 4c
Has a long side arranged substantially in parallel with the arrangement direction of the power line housing 4a and the optical cord housing 4b. The optical unit accommodating portion 4b is a pipe having a hollow portion 4d, and has a linear slit 4e formed along its length. In this hollow part 4d, one optical cord 3c is twisted around the tensile strength wire 3d, and six optical cords 3c are further twisted thereon.
Eight optical units 3B are accommodated.

The composite cable 1B is, for example, a power line 2
Is passed through a substantially gourd-shaped forming die to form a collective coating layer 4B by extrusion coating, and then the tensile strength wire 3d is inserted into the hollow portion 4d of the optical cord accommodating portion 4b.
The optical unit 3B formed by twisting the optical cord 3c around the center is sent in, or the slit 4e is pushed out and inserted, and the optical unit 3B is inserted
b.

In this example, the size and number of power lines 2
Alternatively, the number of cores of the optical unit 3B is set so as to correspond to a power cable or a communication cable normally laid in an apartment house. In this example, the power line 2 has an outer diameter of 2.0.
Conductor area of 22 mm with 7 mm copper wire twisted together
^The outer conductor having a diameter of about 13 mm is provided with a coating layer 2b made of polyvinyl chloride or the like on the ^second conductor 2a. The optical cord 3c is the same as that shown in FIG. The tensile strength wire 3d is made of steel wire or the like and has an outer diameter of about 2 mm. The outer diameter of the optical unit 3B is 10 mm.
It has been.

In the collective covering layer 4B, the power line housing 4
a has an outer diameter of 24 mm and the optical unit housing 4b has an outer diameter of 15 mm.
mm, the inner diameter is 11 mm, and the width of the slit 4e is 2 mm. The connecting portion 4c has a width of 3 mm and a length of 3 mm.

The composite cable 1B is laid in, for example, an apartment house, and when it becomes necessary later, the slit 4e provided in the optical unit housing 4b is pushed out and the optical unit 3B is taken out therefrom. , Optical cord 3c
Can be branched and supplied to the subscriber. After the branching operation is completed, the optical unit 3B is returned from the slit 4e into the hollow portion 4d of the optical unit housing 4b. Thus, in this composite cable 1B, especially the optical cord 3c
The operability of branching is good.

Furthermore, the power line housing 4a (power cable) and the optical unit housing 4b (communication cable) can be branched by cutting off at the connecting portion 4c. At this time, if cuts are formed intermittently in the connecting portion 4c of the collective covering layer 4B along the length direction of the composite cable 1B, the operability of these branches is improved. In this example, when notches are formed in the connecting portion 4c, for example, 400 mm long at intervals of 500 mm in the length direction.
To form a notch.

The optical unit 1B is laid in the optical cord accommodating portion 4b in a state in which the optical unit 3B is not installed, and when necessary, the optical unit 3B is moved to the hollow portion of the optical cord accommodating portion 4b. 4d can also be sent.

When the composite cable 1B is laid, it can be attached to the mounting surface as shown in FIG. 4, for example. In the figure, reference numeral 7 denotes a fixture, which is a rectangular plate-like body made of metal or the like, which is formed by being curved in a semicircular shape at one end in the long side direction thereof. And a flat portion 7b.

Then, the power line accommodating portion 4a of the optical cable 1B is arranged in the concave portion 7a, and the flat portion 7b is attached with the screw 7c so as to sandwich the power line accommodating portion 4a between the concave portion 7a and the mounting surface 6. The composite cable 1 </ b> B is fixed to the mounting surface 6 by being fixed to the surface 6. At this time, in the concave portion 7a, a gap 7d is formed at the end opposite to the flat portion 7b and between the mounting surface 6 and the connecting portion 4c and the optical unit housing portion 4b. The projection protrudes outside the recess 7a. Therefore, the optical cord housing portion 4b is cut off at the connecting portion 4c,
When the power line accommodating portion 4a and the optical cord accommodating portion 4b are branched, the attachment 7 does not interfere.

Since the composite cable 1B has a structure in which the power line 2 and the optical unit 3B are connected to each other, it is possible to lay the power cable and the communication cable at once, which were conventionally performed separately. Space saving can be achieved. Further, since the power line accommodating section 4a and the optical cord accommodating section 4b are substantially independent, the optical cord 3
c is easy to operate, and the power line accommodating portion 4a
The optical cord housing 4b can be cut off at the connecting portion 4c and branched. Further, a slit 4 is formed in the connecting portion 4c.
By providing e, the operability of branching between the power line housing 4a and the optical cord housing 4b can be improved.

In the first and second examples described above, examples in which three power lines and 18 optical fibers are accommodated have been described. However, the present invention is not limited to these, and the present invention is applicable to various types of cables. It can be applied to Then, a cable particularly suitable for a prefabricated optical power composite cable can be obtained.

[0024]

As described above, according to the first aspect of the present invention, since the power line and the optical unit are assembled and integrated with each other, the power cable conventionally used separately is used. And the communication cable can be laid at once. In addition, it can be laid in the same space as the existing power cable, and it can save space. It is suitable as a cable. Further, in the second invention, since the power line and the optical unit are connected to each other, it is possible to reduce the labor for laying, further reduce the space, and is suitable for a prefabricated optical power composite cable. Can be obtained. Further, since the power line accommodating portion and the optical cord accommodating portion are substantially independent, the operability of branching the optical cord is good, and the power line accommodating portion and the optical cord accommodating portion are cut off at the connecting portion. It can also be branched.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a prefabricated optical power composite cable according to a first example of the present invention.

FIG. 2 is a sectional view showing a prefabricated optical power composite cable according to a second embodiment of the present invention.

FIG. 3 is a partial cross-sectional view showing a state in which the prefabricated optical power composite cable of the first example shown in FIG. 1 is fixed to a mounting surface.

FIG. 4 is a partial cross-sectional view showing a state in which the prefabricated optical power composite cable of the second example shown in FIG. 2 is fixed to a mounting surface.

[Explanation of symbols]

1A: Prefabricated optical power composite cable (composite cable), 1B: Prefabricated optical power composite cable (composite cable), 2: Power line, 3A: Optical unit, 3B: Optical unit, 3c: Optical cord, 3d: Tensile wire, 4B: collective coating layer, 4a: power line housing, 4b: optical unit housing,
4c: connecting portion, 4d: hollow portion, 4e: slit.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Akio Mogi 1440, Mukurosaki, Sakura City, Chiba Prefecture Inside Fujikura Sakura Plant Co., Ltd. (72) Inventor Tatsuya Omori 1440, Musaki, Sakura City, Chiba Prefecture Fujikura Sakura Plant ( 72) Inventor Suehiro Miyamoto 1440, Murosaki, Sakura-shi, Chiba Prefecture Inside Fujikura Sakura Factory (72) Inventor Kaname, 2899 Ohara, Oita City, Oita City West Nippon Electric Cable Co., Ltd. (72) Inventor Yasuo Hirai Oita Prefecture 2899 Ohara, Oita City West Nippon Electric Cable Co., Ltd.

Claims (2)

[Claims] 1. A prefabricated optical power composite cable, comprising: a power line and an optical unit assembled; and these are collectively covered. 2. A prefabricated optical power composite cable, wherein a power line accommodating section accommodating a power line and an optical unit accommodating section accommodating an optical unit are connected and integrated by a connecting section.