JP2024025042A - composite cable - Google Patents

Abstract

The present invention provides a composite cable that can improve workability when laying multiple cables. [Solution] A composite cable includes a plurality of cables including at least one of a power cable, a communication cable, a gas pipe, and a water pipe, and a strip-shaped protection member on the outermost periphery of the plurality of cables in a longitudinal direction. and a cable protection portion formed by wrapping the cable around the cable without any gaps. [Selection diagram] Figure 1

Description

The present invention relates to a composite cable in which a plurality of cables are integrated.

2. Description of the Related Art Conventionally, underground power lines are known in which power cables are installed in conduits, tunnels, or troughs (hereinafter referred to as "conduits, etc.") provided underground. In addition to power cables, communication cables and fluid pipes such as water pipes and gas pipes are sometimes installed in conduits and the like. In this disclosure, cables and tubes, including power cables, communication cables, and fluid tubes, are collectively referred to as "cables."

JP2022-066527A

When a plurality of cables are individually passed through an underground conduit or the like and laid, the work of feeding each cable into the conduit is required, so the installation work takes a long time. Further, there is a possibility that the cables laid first and the cables laid later rub against each other, causing damage to the surfaces of the cables.

On the other hand, if a composite cable made up of a plurality of cables can be realized, the above-mentioned problems regarding work time and damage during installation can be solved. For example, the composite cable technology described in Patent Document 1, in which a power cable and a communication cable are twisted together and covered with a sheath, can be applied to the composite cable.

However, when a plurality of cables are made into standardized composite cables at a factory or the like, workability is not necessarily improved. For example, as the weight increases, the length of the cable that can be transported at one time becomes shorter, which requires complicated connection work. Furthermore, as the drum becomes larger, there is a possibility that transportation costs will also increase. Furthermore, depending on the actual installation site conditions, a part of the composite cable may be branched or other cables may be joined to form a composite cable.

An object of the present invention is to provide a composite cable that can improve workability when laying a plurality of cables.

The composite cable according to the present disclosure includes:
A plurality of cables including at least one of a power cable, a communication cable, a gas pipe, and a water pipe;
and a cable protection part formed by wrapping a band-shaped protection member around the outermost periphery of the plurality of cables without gaps in the longitudinal direction.

According to the present invention, workability when laying a plurality of cables can be improved.

FIG. 1 is a side view showing a composite cable according to an embodiment of the present invention. FIG. 2 is an external perspective view of the composite cable.

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

FIG. 1 is a sectional view showing a composite cable 1 according to an embodiment of the present invention. FIG. 2 is an external perspective view of the composite cable 1.

As shown in FIGS. 1 and 2, the composite cable 1 includes a plurality of cables 10 and a cable protector 20. In this embodiment, a power cable 11, a communication cable 12, a water pipe 13, and a gas pipe 14 are arranged as the plurality of cables 10.

Note that the plurality of cables 10 may include at least one of the power cable 11, the communication cable 12, the water pipe 13, and the gas pipe 14. Furthermore, the manner in which the cables 10 are arranged in FIG. 1 is an example, and is not particularly limited, but it is preferable that the cables 10 be arranged so as to be exposed to the outside when the cable protection part 20 is removed.

The power cable 11 is, for example, a Triplex cable (CVT cable) that is formed by twisting three CV cables together and covering them with a sheath. The power cable 11 shown in FIG. 1 is a so-called fan-shaped CVT cable. Note that the power cable 11 may be composed of a plurality of CV cables.

The communication cable 12 is a signal transmission path for wired communication, and may be a metal cable or an optical fiber cable. Although three communication cables 12 are arranged in FIG. 1, the number of communication cables 12 is not particularly limited.

The water pipe 13 is a fluid pipe that transports water. The gas pipe 14 is a fluid pipe that transports gas. The water pipe 13 and the gas pipe 14 are made of, for example, a resin material such as polyethylene, and have appropriate flexibility.

The power cable 11, the communication cable 12, the water pipe 13, and the gas pipe 14 are arranged in a bundle. The power cable 11, the communication cable 12, the water pipe 13, and the gas pipe 14 may be twisted and bundled, or may be bundled together along the longitudinal direction.

Since the composite cable 1 does not have a sheath formed by extrusion molding like a composite electric wire cable, there is no need to arrange the outer shape of the aggregate of the power cable 11, communication cable 12, water pipe 13, and gas pipe 14 into a circular shape. do not have. Therefore, there is no need to place an intervening object between the cables 10.

The cable protection section 20 is disposed on the outermost surface of the composite cable 1, and integrally covers and protects the plurality of cables 10. The cable protector 20 has thermal and mechanical strength that can withstand the friction with the conduit that occurs during installation.

The cable protection part 20 is formed by wrapping the protection member 21 in the longitudinal direction with a predetermined width and spirally wrapping the protection member 21 around the outermost periphery of the cables 10 without any gaps. The ends of the protection member 21, ie, the winding start and winding end, may be fixed. As a fixing method for fixing the end of the protection member 21, for example, wrapping a wire or the like around the end of the protection member 21, using an adhesive tape, an adhesive, or the like can be used. The method of wrapping the protective member 21 is not particularly limited, and it is sufficient that no gap is formed due to displacement of the wrap portion due to rubbing against the pipe line during installation. The wrap width of the cable protection section 20 can be determined as appropriate depending on, for example, the flexibility of the composite cable 1. The cable protection part 20 is formed, for example, by wrapping 1/2 to 1/3 of the width of the cable protection part 20 and winding it in a spiral shape.

Unlike the sheath of a composite wire cable that is formed by extrusion molding of a resin material (for example, vinyl chloride), the cable protection part 20 does not require large-scale manufacturing equipment and can be formed at the construction site. Moreover, the cable protection part 20 is thinner and lighter than the sheath of the composite electric wire cable (general thickness is 4 mm).

The protective member 21 is, for example, a belt-shaped elongated member with a width of 30 to 50 mm. The protection member 21 is expandable and contractible to the extent that it can follow the detours of the composite cable 1. The protective member 21 is, for example, a fluororesin tape. For example, the protection member 21 may be made of a synthetic fiber fabric, such as a cargo fixing belt (lashing material) or a car seat belt.

The protection member 21 is made of a transparent material that transmits light. That is, the arrangement of the internal cables 10 can be visually recognized from the outside of the composite cable 1 without removing the cable protection part 20. Nitoflon (registered trademark), a fluororesin film manufactured by Nitto Denko Corporation, is suitable because it has slipperiness, heat resistance, chemical resistance, weather resistance, and light transparency.

The protection member 21 has a structure that can be easily cut with a blade such as a cutter. "Easily cuttable with a knife" means that it can be cut manually using a common knife without using a special jig. The thickness of the protection member 21 is preferably 3 mm or less so that it can be easily cut with a knife while ensuring its function as the cable protection part 20.

The protection member 21 does not have an adhesive layer on the contact surface with the cables 10, so that the adhesive does not adhere to the cables 10 when the cable protection part 20 is removed and the cables 10 are branched. ing.

The composite cable 1 is inserted into the conduit by connecting a cable pulling tool attached to the tip and a pulling wire inserted from the opposite side of the conduit, and winding the tow wire.

As described above, the composite cable 1 according to the embodiment has the following features singly or in an appropriate combination.

That is, the composite cable 1 includes a plurality of cables 10 and a cable protection section 20 that is provided on the outer peripheral surface of the plurality of cables 10 and integrally protects the cables 10. The cable protection part 20 is formed by wrapping a strip-shaped protection member 21 around the outermost periphery of the plurality of cables 10 without gaps in the longitudinal direction.

According to the composite cable 1, since the plurality of cables 10 can be integrated in advance and passed through the conduit all at once, it is possible to reduce the number of times of laying work of passing the plurality of cables 10 through the conduit, and also to There is no rubbing between the 10s. Furthermore, since the outer circumferential surface of the cables 10 is protected by the cable protector 20, it is possible to prevent the cables 10 from being damaged by sliding contact with the conduit. Therefore, the workability when laying a plurality of cables 10 is significantly improved.

Furthermore, it is possible to form an assembly of a plurality of cables 10 at the installation site and proceed with the installation work while wrapping the protection member 21 and integrating the cables. In this case, the size of the bobbin for transporting each cable type 10 is reduced compared to the case of transporting a composite cable 1 that integrates a plurality of cable types 10, so that transportation costs can be reduced. Can be done. In addition, since the length of the cable that can be transported at one time becomes longer, complicated connection work is also reduced. Note that the composite cable 1 may be manufactured in advance at a factory if it has a length that does not cause problems during transportation.

The protective member 21 has light transmittance. Thereby, the arrangement of the cables 10 inside the composite cable 1 can be visually recognized without removing the cable protection part 20. Therefore, for example, when branching the cables 10, the part of the cable protection part 20 that should be removed can be easily identified. This is particularly suitable when the composite cable 1 is twisted or when the cables 10 are twisted and bundled.

The protection member 21 can be easily cut with a knife. Specifically, the protection member 21 has a thickness of 3 mm or less. Thereby, it is possible to take out a part of the cables 10 by cutting only the part of the cable protection part 20 to be removed with a knife, so that the installation work can be carried out in a short time.

The protective member 21 does not have an adhesive layer on the contact surface with the cables 10. As a result, since the adhesive does not adhere to the cables 10 when the cable protection part 20 is removed, the branching work of the cables 10 is not hindered by the adhesive, and workability is improved.

There are no inclusions between the plurality of cables 10. Thereby, the weight of the composite cable 1 and the manufacturing cost can be reduced.

The plurality of cables 10 include at least one of a power cable 11, a communication cable 12, a gas pipe 14, and a water pipe 13. Thereby, a plurality of types of cables 10 can be efficiently laid within the conduit.

As above, the invention made by the present inventor has been specifically explained based on the embodiments, but the present invention is not limited to the above embodiments, and can be modified without departing from the gist thereof.

The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.

1 Composite cable 10 Cables 11 Power cable 12 Communication cable 13 Water pipe 14 Gas pipe 20 Cable protector 21 Protective member

Claims (6)

A plurality of cables including at least one of a power cable, a communication cable, a gas pipe, and a water pipe;
a cable protection part formed by wrapping a band-shaped protection member around the outermost periphery of the plurality of cables without gaps in the longitudinal direction;
composite cable. The protective member has light transmittance,
The composite cable according to claim 1. The protective member has a thickness of 3 mm or less,
The composite cable according to claim 1 or 2. The protective member does not have an adhesive layer on the contact surface with the cables.
The composite cable according to claim 1 or 2. There is no inclusion between the plurality of cables,
The composite cable according to claim 1 or 2. the plurality of cables are twisted;
The composite cable according to claim 1 or 2.

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