JP2015038823A - Rat-proof cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rat-proof cable which has a permanent rat-proof effect, is light-weight, and has flexibility.SOLUTION: A rat-proof cable includes: a twisted wire core having a predetermined number of insulation core wires; an internal coating resin layer formed on the outer periphery of the twisted wire core; and a carbon fiber resin layer (CFRTP resin layer) formed on the outer periphery of the internal coating resin layer.

Description

  The present invention relates to a protective cable, and more particularly to a protective cable having a permanent protective effect.

  As a conventional fender cable, for example, there is one disclosed in Patent Document 1. This fender cable is constructed by winding a stainless steel tape on a twisted wire core having a predetermined number of insulated wire cores, and is made of a corrugated stainless steel tape obtained by corrugating the stainless steel tape. Furthermore, it has the structure which provided the outer coating layer outside the corrugated stainless steel tape.

  According to this protection cable, when the cable is exposed to the eating behavior of the bag, it comes into contact with the corrugated stainless steel tape under the outer covering layer, so that the cable structure can be prevented from being damaged by further galling. As a result, an antifungal effect is obtained.

  In addition, the anti-corrosion cable disclosed in Patent Document 2 and the like is characterized by a structure containing an anti-cocoon repellent material such as capsaicin or cycloheximide that exhibits an anti-evil effect in the sheath as an anti-anti-tumor measure. These wrinkle repellents have the effect of preventing wrinkle eating behavior.

JP-A-5-74230 JP 2005-44652 A

  However, according to the conventional protective cable of Patent Document 1, since a metal protective layer is provided, there is a problem that flexibility is lowered and the weight of the cable is increased, and workability at the time of installation is deteriorated.

  On the other hand, in Patent Document 2, since the antifungal effect of the repellent drug is not permanent, it will be damaged by wrinkles someday. That is, there is a problem that long-term reliability after cable installation (after erection) is insufficient.

  Accordingly, it is an object of the present invention to provide a protective cable that has a permanent protective effect and is lightweight and flexible.

  In order to achieve the above object, the present invention forms a twisted core having a predetermined number of insulated cores, an inner covering resin layer formed on the outer periphery of the twisted core, and an outer periphery of the inner covering resin layer. Provided is a protective cable having a carbon fiber resin layer (CFRTP resin layer).

  According to the fender cable of the present invention, since the CFRTP resin layer is provided on the outer periphery of the inner covering resin layer, the permanent protection equivalent to the metal protective layer without providing the metal protective layer made of stainless steel tape or the like.鼠 effect can be obtained. In addition, better flexibility than when a metal protective layer is provided can be obtained, and the weight and cost can be reduced.

It is explanatory drawing which shows the armored cable of embodiment of this invention.

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

  FIG. 1 shows a protective cable according to an embodiment of the present invention. For example, it is composed of a twisted core 1 in which a predetermined number of insulated wires coated with polyurethane as an insulator are twisted on an annealed copper wire as a conductor, and an inner coating layer 2 is formed by extruding the outer periphery of the twisted core 1. The CFRTP resin layer 3 having a thickness of 1.0 mm is formed on the outer periphery thereof. An external coating layer may be provided on the outer periphery of the CFRTP resin layer 3.

  Here, CFRTP is a thermoplastic carbon fiber composite material (carbon fiber). For example, carbon cut into a short fiber into a thermoplastic resin such as nylon, polycarbonate, polybutylene terephthalate (PBT), or polypropylene (PP). It is a composite material in which fibers are kneaded and re-pelletized.

  Since the CFRTP resin layer 3 has extrusion processability, productivity is not hindered and cost reduction can be achieved. In particular, a coating step of winding a tape around the sheath and further extruding and coating the resin is not necessary, and the manufacturing cost can be reduced.

  In the fender cable described above, the CFRTP resin layer 3 having a high surface hardness is provided on the outer periphery of the inner covering layer. First, you will avoid eating. As a result, the entire cable is protected from wrinkles without providing a metal protective layer made of stainless steel tape or the like. Since the CFRTP resin layer 3 has high aging resistance, the anti-mold effect is permanent. In addition, the fender cable of the present embodiment is superior in flexibility and lighter than a conventional fender cable using a metal protective layer made of stainless steel tape or the like.

  In the present embodiment, the cable outermost layer is formed of the CFRTP resin layer 3, but in a range that does not depart from the gist of the present invention to prevent the eating behavior of straw for portions other than the CFRTP resin layer 3. Of course, various changes can be made.

  In the embodiment of the present invention, the CFRTP resin layer 3 has characteristics of a tensile strength of 1000 MPa or more, a tensile modulus of 200 GPA, a compressive strength of 200 MPa, a compressive modulus of 100 GPa, and a shear strength of 50 MPa or more in preventing the eating behavior of strawberries. The thickness is preferably 0.5 to 1.5 mm. If the thickness is less than 0.5 mm, it will not be able to withstand the eating behavior of the cocoon, and the antifungal effect will not be recognized, and if it exceeds 1.5 mm, the CFRTP resin layer has high rigidity, so the flexibility of the cable becomes high, Cost increases.

1: Twisted wire core 2: Inner coating layer 3: CFRTP resin layer

Claims (3)

  A twisted core having a predetermined number of insulated cores, an inner covering resin layer formed on the outer periphery of the twisted core, and a carbon fiber resin layer formed on the outer periphery of the inner covering resin layer Protective cable characterized by The fender cable according to claim 1,
The carbon fiber resin layer has a tensile strength of 1000 MPa or more, a tensile elastic modulus of 200 GPA, a compressive strength of 200 MPa, a compressive elastic modulus of 100 GPa, and a shear strength of 50 MPa or more. The fender cable according to claim 1 or claim 2,
The said carbon fiber resin layer has a coating thickness of 0.5-1.5 mm, The fender cable characterized by the above-mentioned.

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