JP2003086028A - Composite cable - Google Patents

Abstract

(57) [Summary] (Problem corrected) [Problem] In a composite cable in which a power supply line and a communication line are combined, mounting pressure is applied to a communication line composed of an optical cord when the cable is laid. Transmission fluctuation may occur. A composite cable that eliminates such disadvantages is provided. SOLUTION: One of the composite cables according to the present invention is a composite cable in which a power supply line 1 and a hollow pipe 2 capable of accommodating an optical communication line are collectively covered, and is connected between an adjacent power supply line and a hollow pipe. A power supply line and a hollow pipe can be separated by forming a portion 4 and cutting off the connection portion. Another one is that the hollow pipe can accommodate the optical communication line movably in one or both of the axial direction and the radial direction. The other one uses an optical communication line accommodated in a hollow pipe as an optical cord.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite cable in which a power line and a communication line are combined.

[0002]

2. Description of the Related Art Conventionally, various cables such as a power supply line and a communication line are individually laid indoors, which is very complicated. Therefore, recently, a composite cable in which a power line and a communication line are combined has been used.

An example of a composite cable currently in use is shown in FIGS. 4 (a) and 4 (b). The composite cables shown in these figures are obtained by collectively coating an insulating coated conductor A obtained by applying an insulating coating to a plurality of conductors that are collectively twisted, a hollow pipe and B, and a resin coating D, as shown in FIG. 4 shows a round composite cable, and FIG. 4 (b) shows a flat composite cable. This type of composite cable is laid indoors and then uses compressed air to send the optical communication line C (optical fiber unit C) into the hollow pipe B (sending method). The transmission of the optical fiber unit C may be performed when the composite cable is laid or after the laying, when demand for optical communication is generated.

[0004]

The conventional composite cable has the following problems. (1) Generally, since this type of composite cable is laid directly on the floor or wall surface such as indoors, external pressure is easily applied. In particular, when the insulation-coated conductor A and the hollow pipe B are laid on a wall in a state of being twisted in a round shape, the composite cable is sandwiched and held between the fixture and the wall, so that the external pressure is locally applied. Easily joins the hollow pipe B. When external pressure acts,
The optical fiber unit C being sent through the hollow pipe B
Lateral pressure may be applied to and transmission loss fluctuation may occur. Therefore, conventionally, in order to reduce the transmission loss fluctuation as much as possible,
Means such as arranging a cushioning material on the outside of the hollow pipe B, thickening the presser winding, and thickening the coating have been taken. However, if such measures are taken, the production process and production cost will increase. (2) On the other hand, in the case of the structure in which the insulation-coated conductor A and the hollow pipe B are collectively covered, in order to connect the insulation-coated conductor A and the optical fiber unit C to each device, the insulation-coated conductor A and the optical fiber unit C are connected to the insulation-coated conductor A at the end of the cable. It is necessary to separate it from the optical fiber unit C. Specifically, as shown in FIG. 4C, it is necessary to cut the resin coating D along the longitudinal direction of the cable to separate the insulating coating conductor A and the optical fiber unit C (hollow pipe B). However, when the resin coating D is cut, the insulating coated conductor A and the hollow pipe B are partially exposed.

[0005]

One of the composite cables of the present application is a composite cable in which a power supply line and a hollow pipe capable of accommodating an optical communication line are collectively covered, and an adjacent power supply line and a hollow pipe are provided. A connecting portion is formed between the two, and the connecting portion is cut to separate the power supply line from the hollow pipe. If the power supply line and the optical communication line are separated by tearing the connecting portion, the separated power supply line is covered with a jacket having a predetermined thickness and satisfies the JIS C 3342 standard. Further, since the hollow pipe is covered with the outer cover having a uniform thickness, no local lateral pressure is applied to the hollow pipe, and the hollow pipe is protected from scratches at the time of retaining and the external environment. As a result, it is not necessary to dispose a protective material such as a cushioning material around the hollow pipe, and the production process and production cost can be reduced.

Another one of the composite cables of the present application is a hollow pipe capable of accommodating an optical communication line movably in an axial direction and / or a radial direction thereof.

Another one of the composite cables of the present application uses an optical cord as an optical communication line housed in a hollow pipe.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) An example of an embodiment of the composite cable of the present invention will be described below. This composite cable is a bundle of three insulated coated conductors and one hollow pipe.

[0009] Each insulated wire (hereinafter "power line")
Is a soft wire with a diameter of 2.0 mm covered with PVC (Poly Vinyl Chloride) specified in JIS C 3342. Among the three power lines, one of them is black, the other one is white, and the other one is red so that they can be identified. Hollow pipe has an outer diameter of 4.0 mm and an inner diameter of 2.5 mm
It is a pipe made of HDPE.

As shown in FIG. 1, the insulating coated conductor 1 and the hollow pipe 2 are arranged in a direction perpendicular to the longitudinal direction,
Collectively covered with PVC coating 3. Specifically, P
Three insulated wires 1 identified by the color of the VC wire 3
a to 1c are arranged in a direction perpendicular to the longitudinal direction in a predetermined order, and the hollow pipes 2 are arranged next to either one of the insulation coated conductors (insulation coated conductor 1c in FIG. 1) on both outer sides, and these are collectively arranged. It is covered. Further, a connecting portion 4 is integrally formed between the adjacent insulating coated conductor 1c and the hollow pipe 2.

The composite cable of the present invention having the above-described structure is laid on the floor or wall surface of the room, and is initially used as a power line. After that, when demand for optical communication occurs, the optical communication line 5 (optical cord 5) is passed through the hollow pipe 2 and used as an optical power line composite cable. Therefore,
When a tetron thread (not shown) is sent through the hollow pipe 2 using compressed air at the time of laying and the demand for optical communication occurs, the tetron thread is used to pass the optical cord 5 through the hollow pipe 2. It is desirable to do. Specifically, the optical cord 5 is attached to one end of the Tetoron yarn contained in the hollow pipe 2.
Connect the tension members (Kevlar fiber). After that, the other end of the Tetoron yarn is pulled from the opposite side of the hollow pipe 2 to pass the optical cord 5 through the hollow pipe 2 (pulling-in method).

When the insulating coated conductor 1 and the optical cord 5 are connected to respective devices, as shown in FIG. 2, the connecting portion 4 is cut to separate the insulating coated conductor 1 and the optical cord 5 (hollow pipe 2). Separate. At this time, even if the connecting portion 4 is torn, the insulation-coated conductor 1 is made of PVC with a wall thickness specified by JIS C3342.
Covered with coating 3, VVF (600V Polyvinyl Chloride insul
ated and Sheathed Cable: 600V vinyl insulation vinyl sheath cable flat type). The hollow pipe 2 is also covered with the PVC coating 3 having a constant wall thickness. Therefore, the insulating coated conductor 1 and the optical cord 5 in the hollow pipe 2 are sufficiently protected from lateral pressure, changes in the external environment, scratches and the like. In particular, the characteristics of the optical cord 5 in the hollow pipe 2 are retained, and the reliability is not impaired. Here, the optical cord 5 is, as shown in FIG. 3, a cord in which a tension member 11 is arranged around an optical fiber core wire 10 and covered with PVC. Although the illustrated optical fiber core wire 10 is a two-core tape-shaped core wire, it may be other than this.

(Embodiment 2) When the composite cable of the present invention is used, an optical cord can be passed through a hollow pipe before laying the cable. However, if the optical cord is passed through before installation, the bending of the optical cord may affect the characteristics of the optical cord. In addition, the cable pull-fastener used for laying may exert a lateral pressure on the optical cord, which may affect the characteristics of the optical cord. Therefore, from the viewpoint of maintaining the characteristics of the optical code,
It is desirable to pass the wire after laying.

An optical unit can be sent through the hollow pipe by a sending method. However, a large-scale equipment such as a transmitter and a compressor is required for the feeding method using an optical unit. Noise and vibration are generated. Therefore, for the indoor wiring, the pulling-in method is suitable, which does not require any equipment and does not generate noise or vibration. Further, in the pulling-in method, since the tension member of the optical cord is pulled, there is an advantage that the optical fiber core wire is not tensioned and the reliability is not impaired.

The composite cable of the present invention also includes a composite cable having the structure shown in Table 1 below. In addition, "power supply line" of Table 1
The "number" in the column indicates the number of insulating coated conductors that are collectively coated with the hollow pipe. “Conductor diameter” refers to the diameter of the conductor wire of the insulating coated conductor. “Insulation outer diameter” refers to the diameter of the insulating coated conductor. The “insulating material” refers to the material of the coating of the insulating coated conductor. The "number" in the "pipe" column indicates the number of hollow pipes that are collectively covered with the insulating coated conductor. “Inner diameter” refers to the inner diameter of the hollow pipe. “Outer diameter” refers to the outer diameter of the hollow pipe. "Material"
Indicates the material of the hollow pipe. The “thickness” in the “cable” column indicates the thickness of the composite cable.
"Width" indicates the width of the composite cable. The “neck portion” indicates the length and width of the connecting portion.

[0016]

[Table 1]

[0017]

The composite cable of the present application has the following effects. (1) The power supply line and the hollow pipe that can accommodate the optical communication line are collectively covered. Therefore, after laying, the optical power line composite cable can be realized by passing the optical communication line through the hollow pipe as needed. (2) A connecting part is formed between the adjacent power supply line and the hollow pipe, and the connecting part is torn to separate the power supply line and the hollow pipe. Therefore, even if the power supply line and the hollow pipe are separated, one or both of them are not exposed outside the coating. As a result, the characteristics of the power supply line and the optical communication line are maintained, and the reliability is not impaired.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of an embodiment of a composite cable of the present invention.

FIG. 2 is an explanatory view showing a state in which an insulating coated conductor and a hollow pipe of the composite cable of FIG. 1 are separated.

FIG. 3 is an explanatory diagram showing an example of an optical code.

FIG. 4 is a diagram showing a conventional composite cable,
Is an explanatory view showing a round composite cable, (b) is an explanatory view showing a flat composite cable, and (c) shows a state in which the insulating coated conductor and the hollow tube of the flat composite cable shown in (b) are separated. Explanatory drawing.

[Explanation of symbols]

1 Insulated conductor 2 hollow tube 3 PVC coating 4 connection 5 optical cord 10 Optical fiber core 11 tension members

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hirofumi Ito             Chubuden, 1 Higashishinmachi, Higashi-ku, Nagoya-shi, Aichi             Power Co., Ltd. F term (reference) 2H001 FF01 MM06                 5G309 JA04                 5G319 HA08 HB05 HC01 HD02 HD07                       HE07 HE14

Claims (3)

[Claims] 1. In a composite cable in which a power supply line and a hollow pipe capable of accommodating an optical communication line are collectively covered, a connecting portion is formed between adjacent power supply lines and the hollow pipe, and the connecting portion is cut off. A composite cable characterized in that the power line and the hollow pipe can be separated. 2. The composite cable according to claim 1, wherein the hollow pipe can accommodate the optical communication line so as to be movable in the axial direction and / or the radial direction thereof. 3. The composite cable according to claim 1, wherein the optical communication line accommodated in the hollow pipe is an optical cord.