JPH0887917A - Clearance cable - Google Patents

Abstract

PURPOSE: To concurrently provide a control cable relating to a coaxial wire main unit by integrally forming a control cable group, wound with a polyester tape with under coat, bonded to a thermoplastic adhesive tape, so as to prevent the control cable from coming off. CONSTITUTION: A drain wire 4 is parallelly arranged to a side surface of a coaxial core 3 of rectangular cross section provided with a coating 2 of FEP (copolymer of ethylene tetrafluoride-propylene hexafluoride) on a conductor 1, and an aluminum/polyester tape 5' with under coat, formed of thermoplastic bonding agent layer, is wound against parallelly arranging each core 3 and wire 4 so as to direct the under coat to the outside, to obtain a collectively shielded coaxial wire 6. A polyester tape 11 with under coat is wound so as to direct an under coat surface to the outside relating to two parallelly arranged control cables 9 of circular cross section provided with a coating 8 of FEP on a conductor 7, to obtain a collectively retaining wound control cable group 12. These cable 6 and cable group 12 are parallelly formed into a flat surface, laminated by a tape 10 and adhesively integrally formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin clearance cable which is used for wiring after passing through a clearance such as a window frame of a house or the like.

[0002]

2. Description of the Related Art FIG. 1 shows a conventional clearance cable. In this cable, a drain wire 4 is arranged in parallel on the side surface of a coaxial core 3 having a rectangular cross section in which a coating 2 of FEP (tetrafluoroethylene-propylene hexafluoride copolymer) is provided on a conductor 1. A coaxial wire 6 in which an aluminum / polyester tape 5 is wound around a core and a drain wire in parallel and shielded collectively, and two control wires 9 and 9 having a circular cross section in which an FEP coating 8 is provided on a conductor 7. , A flat structure in which the thermoplastic adhesive tapes 10 and 10 are laminated in parallel on a plane.

[0003]

The coaxial line 6 and the control line 9,
9 is arranged in parallel and laminated with the thermoplastic adhesive tapes 10 and 10, the control lines 9 and 9 are poorly adhered to each other and the control lines 9 and 9 come off after the thermoplastic adhesive tape is laminated. The phenomenon that happened happened. As a result of investigating the cause, it was revealed that the coating of the control line with the tetrafluoroethylene-hexafluoropropylene copolymer had poor adhesion to the thermoplastic adhesive tape.

By the way, regarding the coaxial wire, an undercoat consisting of a thermoplastic adhesive layer is applied to the surface of the aluminum / polyester tape which constitutes the collective shield of the coaxial core and the drain wire, and the adhesion with the thermoplastic adhesive tape is excellent. However, it can be said that the above-mentioned problems have occurred because no such countermeasure for adhesion is taken for the control lines 9 and 9.

Therefore, the object of the present invention was improved so that the control line provided with a coating of FEP (ethylene tetrafluoride-propylene hexafluoride copolymer) would not come off from the laminated portion of the thermoplastic adhesive tape. , It is to provide a clearance cable mainly composed of a coaxial line and having a control line.

[0006]

The clearance cable provided by the present invention has a drain wire on the side surface of a coaxial core provided with a FEP (tetrafluoroethylene-hexafluoropropylene copolymer) coating on a conductor. And the coaxial core and drain wire arranged in parallel, and the aluminum / polyester tape with an undercoat consisting of a thermoplastic adhesive layer is wrapped around the coaxial core and drain wire so that the undercoat surface faces outward, and the coaxial wire and the conductor are collectively shielded. A control line group in which a polyester tape with an undercoat made of a thermoplastic adhesive layer is wound in parallel with the control lines provided with the FEP coating on the underside so that the undercoat surface faces outward, and is wound together.
Laminate with thermoplastic adhesive tape in parallel on a flat surface,
The undercoat on the surface of the coaxial line and the control line group is adhered and integrated with the thermoplastic adhesive tape to compensate for the poor adhesion of the control line coating material FEP to other substances. This is to ensure the integration with and prevent the control line from coming out.

Further, in particular, the total thickness of the coaxial core with the rectangular cross section including the aluminum / polyester tape with the undercoat of the coaxial line and the undercoat of the control line parallel group in which the control line has the round cross section. By making the total thickness including the attached polyester tape approximately the same and making the step of the part where the coaxial line and the control line parallel group surface of the thermoplastic adhesive tape adhere to each other minute, the control line and the laminated tape It is possible to reduce the effect of weakening the adhesive strength of the. The optimum thickness of the undercoated polyester tape is 4 μm to 12 μm,
Within this range, the tape wrapping workability and the degree of tightening on the control line are improved.

[0008]

FIG. 1 shows a preferred embodiment of a clearance cable according to the present invention. The same parts as those in FIG. 2 are designated by the same reference numerals.

In the clearance cable of this embodiment, a drain wire 4 is provided on a side surface of a coaxial core 3 having a rectangular cross section in which a coating 2 of FEP (tetrafluoroethylene-propylene hexafluoride copolymer) is provided on a conductor 1. And the coaxial core 6 and the drain wire are arranged in parallel, and the aluminum / polyester tape 5'with an undercoat made of a thermoplastic adhesive layer is wound around the parallel core 6 and the drain wire so that the undercoat faces outward, and the coaxial wire 6 is shielded together. , The undercoat surface of the polyester tape 11 with an undercoat formed of a thermoplastic adhesive layer is directed outward with respect to two parallel control lines 9 and 9 each having a circular cross-section with the FEP coating 8 provided on the conductor 7. And the control wire group 12 wound in a batch and wound as described above are laminated in parallel on the plane with the thermoplastic adhesive tapes 10 and 10, and the coaxial wire 6 and the control wire group 12 In the undercoat is obtained by integrally bonded to the thermoplastic adhesive tapes 10,10.

[0010]

According to the clearance cable of the present invention as described above, when the thermoplastic adhesive tape as the outer cover is laminated, the control line group wound with the polyester tape with the undercoat adheres to the thermoplastic adhesive tape. Since they are integrated, there is an effect that the control line cannot be completely removed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a clearance cable according to the present invention.

FIG. 2 is a cross-sectional view showing an example of a conventional clearance cable.

[Explanation of symbols]

1 conductor 2 FEP (tetrafluoroethylene-propylene hexafluoride copolymer) coating 3 coaxial core 4 drain wire 5 aluminum / polyester tape 5'undercoated aluminum / polyester tape 6 coaxial wire 7 conductor 8 FEP (tetrafluoride) Ethylene-propylene hexafluoride copolymer) coating 9 Control line 10 Thermoplastic adhesive tape 11 Undercoat / polyester tape 12 Control line group

Claims (2)

[Claims] 1. A drain wire is arranged in parallel on a side surface of a coaxial core having a conductor coated with FEP (ethylene tetrafluoride-propylene hexafluoride copolymer) on the side surface of the coaxial core and the drain wire. For the parallel connection of the coaxial line, which is made by winding the undercoat aluminum / polyester tape consisting of the thermoplastic adhesive layer so that the undercoat surface faces outward, and the shielded line, and the control line with the FEP coating on the conductor. A control line group consisting of a polyester tape with an undercoat consisting of a thermoplastic adhesive layer, wound so that the undercoat surface faces the outside and wound together, is laminated in parallel on a flat surface with a thermoplastic adhesive tape, and then coaxial. A clearance cable characterized by being bonded and integrated with a thermoplastic adhesive tape with an undercoat on the surface of the wires and control wires. 2. The total thickness of the coaxial wire having a rectangular cross section, including the aluminum / polyester tape with an undercoat, and the control line parallel group in which the control wire has a round cross section. 2. The clearance cable according to claim 1, wherein the total thickness including the tape is substantially the same, and the step of the portion where the surface of the parallel line and the control line parallel group of the thermoplastic adhesive tape adheres is made minute.