JP2001266665A - Composite optical fiber and power cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite optical fiber and power cable for allowing reduction in the trouble of electric work and cost by integrating a VVF cable for a power cable and an optical fiber cable for information communication for prior wiring in prospect of future information communication, particularly in a general house. SOLUTION: The VVF cable has a plurality of insulated core wires 33 arranged in parallel with a conductor 31 coated with an insulator 32 coated with a sheath 34. At least one optical fiber cable 41 (42) is compositely embedded in a lengthwise direction in a sheath 34 between insulated core wires 33. Thus, the VVF cable as a power cable and the optical fiber cable 41 (42) as an information communication wire are integrated. Particularly in a general-house indoor wiring, the optical fiber 41 (42) cable can be laid beforehand as a composite optical fiber 30 and power cable for a case where for example, a LAN equipment, is installed in future information communication. This eliminates the need for electric work as in the past such as running only an optical fiber cable through an indoor wall later, thus allowing a cost reduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber composite in which a VVF cable generally used as a power line for indoor wiring in a general house and an optical fiber cable as an information communication line are combined to enable advance wiring. Regarding power cables.

[0002]

2. Description of the Related Art In recent years, following the wave of computerization by personal computers, information communication networks have become more and more popular even in ordinary houses. A communication network that connects hardware of various electronic devices to each other, that is, a LAN (local-area network)
etwork) system is no exception. This LAN
In the case of information communication lines such as UTP cables (unshielded twisted pair wires) and telephone lines, which are frequently used in systems, for example, VVF cables (600 V vinyl insulated vinyl sheath flat type cables) which are general-purpose power lines for lighting and electric power equipment. Separately, it has been customary to perform wiring work afterwards.

By the way, the outlets of both the UTP cable for the information communication line and the VVF cable for the power line are often provided side by side. That means that the UTP cable is routed on the same wiring route as the VVF cable.

FIG. 3 is a block diagram showing an example of a LAN system in a general house using a UTP cable for an information communication line.

In the case of this LAN system example, the coaxial cable 1 from the CATV protector is drawn into the information distribution board 10, and the telephone service line 2 is also drawn from the telephone protector. The information distribution board 10 is a four-distribution type distributor 11
And a dial-up router 12. The dial-up router 12 is provided with, for example, a DSU (data storage unit), a LAN 4 port, and an analog telephone 2 port. These devices and ports are, for example, four types of first to fourth information outlets 13, 1.
4, 15, and 16 are connected.

The four-distribution type distributor 11 connected to the CATV protector by the coaxial cable 1 is connected to the first information outlet 13 by the coaxial cable 3, and the second information outlet 13 is further connected by the coaxial cables 4 and 5. Third information outlet 14,
15 respectively.

The dial-up router 12 connected to the telephone protector by the telephone service line 2 is connected to the first information outlet 13 by a UTP cable 20, and further connected to the second and third information outlets by UTP cables 21 and 22. They are connected to outlets 14 and 15, respectively.

The coaxial cable 3 and the UTP cable 20 constitute a composite cable A, the coaxial cable 4 and the UTP cable 21 constitute a composite cable B, and the coaxial cable 5 and the UTP cable 22 constitute a composite cable C. The coaxial cable 6 and the UTP cable 23 form a composite cable D and are connected to the corresponding first to fourth information outlets 13 to 16, respectively.

Further, a second information outlet 1 of them
4, another UTP cable 24 adjacent to the composite cable B is connected to the dial-up router 12, and the third information outlet 15 is also connected to the dial-up router 1 by another UTP cable 25 adjacent to the composite cable C.
2 are connected.

As can be seen from the LAN system illustrated in FIG. 3, each of the UTP cables 20 to 25 is routed on the same wiring route as a power line such as a VVF cable. At the time of wiring, each of the UTP cables 20 to 25 involves a work of passing through the inside of a house wall. Therefore, it is anticipated that future information and communication lines will be installed even if they are not necessary for the time being.
Preliminary work is performed on the information communication line such as 25 together with the power line VVF cable, so that the labor and cost involved in redoing and replacing electrical work can be saved.

From the above, it is conceivable that the UTP cable of the information communication line and the VVF cable of the power line are combined into a composite cable to perform preparatory work.

For reference, FIG. 4 shows a general-purpose VVF cable 25 as a power line. That is, a conductor 26 made of soft copper, aluminum, or the like is covered with an insulator (polyvinyl chloride: vinyl resin such as PVC) 27 to form an insulated core wire 28. The two insulated core wires 28 are arranged in parallel and PVC And the like.

[0013]

However, in the case of such a composite cable composed of the UTP cable and the VVF cable, there are the following problems. When a UTP cable as an information communication line is combined with a power line VVF cable vertically, a metal conductor of the UTP cable receives electrostatic induction from the VVF cable. In order to avoid such inconvenience, if an optical fiber cable is used instead of the UTP cable as the information communication line, VVF
This is advantageous because it does not require electrostatic induction from the cable.

Therefore, an object of the present invention is to integrate a VVF cable of a power line and an optical fiber cable of an information communication line in advance and in advance, especially in general home wiring, in anticipation of the future use of information communication. Accordingly, an object of the present invention is to provide an optical fiber composite power cable which reduces electric work and costs.

[0015]

In order to achieve the above object, according to the first aspect of the present invention, there is provided an optical fiber composite power cable comprising a plurality of insulated core wires having a conductor covered with an insulator. In a VVF cable in which books are arranged in parallel and covered with a sheath 34, at least one optical fiber cable 41 (42) is buried in the sheath 34 between the insulating core wires 33 in the longitudinal direction. It is characterized by having done.

With the above configuration, VVF as a power line
Since it is the optical fiber composite power cable 30 in which the cable and at least one optical fiber cable 41 (42) as an information communication line are integrated, particularly in the case of indoor wiring of a general house, for example, a LAN system is required for future information communication. When installing the optical fiber composite power cable 30
Since the optical fiber cable is preliminarily constructed, electrical work such as passing only the optical fiber cable through an indoor wall after installation as in the related art is not required, and the cost can be reduced.

An optical fiber cable has an advantage that it is not affected by electrostatic induction by a power line VVF cable like a UTP cable (unshielded twisted pair), which is the same information communication line, and is convenient for compounding with a VVF cable. It is.

In the optical fiber composite power cable according to the second aspect, at least one optical fiber insertion protection pipe 43 is embedded in the sheath 34 near one of the insulated core wires 33 in the longitudinal direction. An optical fiber core wire 44 is inserted into the optical fiber insertion protection pipe 43.

In this case, the optical fiber insertion protection pipe 43 is buried in advance in the sheath of the VVF cable and is molded, so that an optical fiber composite power cable in which only the optical fiber core wire 44 can be inserted in retrospect. be able to.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an optical fiber composite power cable according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view showing an optical fiber composite power cable 30 according to the first embodiment. The optical fiber composite power cable 30 of this example is basically a general-purpose VVF cable as a power line, and an optical fiber cable 4 as an information communication line is connected to the VVF cable portion.
1, 42 are compounded in such a manner as to be buried in parallel in the longitudinal direction.

Strictly speaking, in the VVF cable portion, a conductor 31 made of soft copper or aluminum is covered with an insulator (polyvinyl chloride: vinyl resin such as PVC) 32 to form an insulating core wire 33 in the VVF cable portion. The two insulated core wires 33 are arranged in parallel and covered with a sheath 34 made of PVC or the like.

In the case of the present embodiment, two optical fiber cables 4 are provided between the two insulated core wires 33 of the VVF cable portion, and in the sheath 34 between the core wires, on the front side and the back side in the longitudinal direction.
1 and 42 are buried in parallel to constitute the optical fiber composite power cable 30.

With the above configuration, when the optical fiber composite power cable 30 of the present example is wired indoors in a general house,
For the time being, optical fiber cables 41 and 4 as information communication lines
Even if 2 is unnecessary, it will be wired in advance together with the VVF cable section as a power line in anticipation of future informationization. This eliminates the need for electrical work such as passing the optical fiber cables 41 and 42 alone as information communication lines in the wall of an existing house or replacing them as in the related art.

Since the two optical fiber cables 41 and 42 are both located between the insulated core wires 33, the two optical fiber cables 41 and 42 are protected by the insulated core wires 33 on both sides even if external force such as bending or bending is applied. These two optical fiber cables 4
Such external force does not need to act on 1,42. Conversely, VV
As the F cable, two optical fiber cables 41,
Since 42 extends in the longitudinal direction and is embedded in the sheath 34, the flexibility of the VVF cable is not impaired.

On the other hand, FIG. 2 shows an optical fiber composite power cable according to a second embodiment of the present invention, which can be said to be a modification of the first embodiment.

The optical fiber composite power cable 30 of this embodiment is not the structure in which the optical fiber cables 41 and 42 are directly embedded in the sheath 34 as in the first embodiment, but is referred to in the present invention. In this structure, an optical fiber inserted into a hollow pipe 43 which is an optical fiber insertion protection pipe is embedded in a sheath 34 via the hollow pipe.

In this case, in the present embodiment, one hollow pipe 43 is embedded in the sheath 34 near one of the two insulated core wires 33, and an optical fiber cable is inserted into the hollow pipe 43. .

However, when considering the size of a general-purpose type as a VVF cable, the thickness of the hollow pipe 43 embedded in the sheath 34 is limited. That is,
Since it is impossible to insert the cables such as the optical fiber cables 41 and 42 shown in FIG. 1 into the hollow pipe 43 in the form of a cord or the like, in this example, the optical fiber core wire which is the basis of the optical fiber cable or the optical fiber cord is used. 44 will be inserted.

Therefore, in the second embodiment, the hollow fiber tube 43 is buried in the sheath 34 in advance and molded, so that the optical fiber core wire 44 can be extremely inserted later. It can be a composite power cable. There is also an advantage that such an optical fiber core wire 44 can be protected by entering the hollow pipe 43.

When the optical fiber core wire 44 has a diameter of 0.3 mm, the hollow pipe 43 into which the optical fiber 44 enters may have an outer diameter of about 1.9 mm. However, the size is not limited to these dimensions without departing from the technical idea of the present invention.

[0032]

As described above, the optical fiber composite power cable according to the first aspect of the present invention is a composite cable in which a VVF cable as a power line and an optical fiber cable as an information communication line are integrated. Therefore, especially in the case of indoor wiring in a general house, when an optical fiber cable is preliminarily constructed as the optical fiber composite power cable 30 when, for example, a LAN system is to be installed in the future information communication, the optical fiber Electrical work, such as retrofitting only fiber cables through indoor walls, is unnecessary, and costs can be reduced. In addition, the optical fiber cable has an advantage that it does not receive electrostatic induction by a power line VVF cable like a UTP cable (unshielded twisted pair) which is the same information communication line.
This is convenient for compounding with a cable.

In the optical fiber composite power cable according to the second aspect of the present invention, the optical fiber insertion protection pipe is previously embedded and molded in the sheath of the VVF cable, so that only the optical fiber core wire is extremely retrofitted. Thus, an optical fiber composite power cable that can be inserted into the cable can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an optical fiber composite power cable according to a first embodiment of the present invention.

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

FIG. 3 is a block diagram showing an example of a LAN system in a general house.

FIG. 4 is a sectional view showing a general-purpose VVF cable.

[Explanation of symbols]

 Reference Signs List 30 optical fiber composite power cable 31 conductor 32 insulator 33 insulated core wire 34 sheath 41, 42 optical fiber cable 43 hollow pipe 44 optical fiber core wire

Claims (2)

[Claims] 1. A VVF cable in which a plurality of insulated core wires whose conductors are covered with an insulator are covered in parallel with a sheath in a state where the plurality of insulated core wires are arranged in parallel with each other. An optical fiber composite power cable, wherein at least one optical fiber cable is embedded. 2. At least one optical fiber insertion protection pipe is buried in the sheath near the one side of the insulated core wire in the longitudinal direction, and the optical fiber core protection wire is inserted into the interior of the optical fiber insertion protection pipe. The optical fiber composite power cable according to claim 1, wherein: