JPH0716327U - Steel pipe insulator cable with stretch prevention wave - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a corrugated steel pipe insulation cable in which the corrugated portion of the steel pipe is not stretched even when a long corrugated steel pipe insulation cable is installed. [Structure] An anti-stretch corrugated steel pipe insulation cable having a structure in which a tape-shaped material made of shape memory resin is wound around the surface of the corrugated steel pipe insulation cable.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a corrugated steel pipe armored cable.

[0002]

[Prior art]

 Fig. 3 shows a perspective view of the corrugated steel pipe insulation cable, and Fig. 4 shows a schematic view of its cross section.

The corrugated steel pipe armored cable 1 has a conductor 2 on which a wire core 4 covered with an insulator 3 is twisted, and a corrugated steel pipe armor 5 is provided on the wire core 4 to further prevent corrosion. This is a structure in which the layer 6 is provided.

When a long corrugated steel pipe-insulated cable is installed, excessive frictional resistance is generated between the cable and a lower contact surface such as a floor surface. As a result, the corrugated portion of the steel pipe of the corrugated steel pipe armoring cable may be stretched and the armoring itself may be stretched.

[0005]

[Problems to be solved by the device]

 The object of the present invention is to solve the above-mentioned drawbacks of the prior art, and even when a longer corrugated steel pipe insulation cable is installed, the corrugated steel pipe insulation cable in which the corrugated portion of the steel pipe is not stretched. To provide.

[0006]

[Means for Solving the Problems]

 The above object is achieved by the development of the corrugated steel pipe insulator cable of the present invention.

That is, it is an object of the present invention to provide an anti-stretch corrugated steel pipe armored cable having a structure in which a tape-shaped material made of a shape memory resin is wound around the surface of the corrugated steel pipe armored cable.

FIG. 1 shows a perspective view of a steel pipe insulator cable 1 with a stretch-breaking wave according to the present invention in which a tape-shaped material made of a shape memory resin is wound around the surface. In FIG. 1, the structure of the corrugated steel pipe armored cable itself is the same as the structure of the conventional corrugated steel pipe armored cable shown in FIG. The shape-memory resin tape 7 on the surface of the cable 1 is wound to form the steel pipe-insulated cable with stretch preventive wave of the present invention.

The shape memory resin used here is made of a material having a low coefficient of friction, and the original shape of the shape memory resin is a round cross section like a string. The shape is such that it can be stored on a winding core so that it can be stored without taking up much space when storing it, and when used, it has a shape that makes it easy to wind it on the surface of the cable and restores it to its original shape by heating with hot air. Memory resin is desirable.

[0010]

[Action]

 The shape memory resin of the present invention (1) is in the form of a tape, so that it can be easily wrapped around the surface of a cable.

(2) The resin wound by heating with hot air becomes a string shape, which is originally made of a material having a low friction coefficient and also becomes a string shape, so that the frictional resistance with the contact object can be extremely reduced.

(3) The tape shape is convenient for storage.

There is a characteristic action such as.

[0014]

【Example】

 The shape-memory resin tape of the present invention is wrapped around a corrugated steel pipe encased cable (Fig. 1), and in use, the original string-like shape is treated by hot air heating, etc. When installing a cable with corrugated steel pipe insulation longer than the conventional one, excessive friction resistance does not occur between the cable and the contact surface such as the floor surface. The corrugated part of the steel pipe of the cable is not stretched.

FIG. 2 is a perspective view showing a state in which a shape-memory resin tape is wrapped around the corrugated steel pipe-insulated cable and heated to form the shape-memory resin into a string shape.

[0016]

[Effect of device]

 As is clear from the above description, the tape-shaped shape memory resin of the present invention having a low coefficient of friction is wrapped around the corrugated steel pipe encased cable, so that when the corrugated steel pipe encased cable is installed, The frictional resistance between the floor and the contact surface such as the floor is remarkably low, and even if a longer corrugated steel pipe piercing cable is laid, no trouble such as elongation of the bracing occurs.

[Brief description of drawings]

FIG. 1 is a perspective view of a steel pipe insulator cable with a stretch preventive wave of the present invention wrapped with a shape memory tape.

FIG. 2 is a perspective view of a corrugated steel pipe armored cable provided with a cord band according to the present invention.

FIG. 3 is a perspective view of a conventional corrugated steel pipe armored cable.

FIG. 4 is a cross-sectional view of a steel pipe insulator cable with a stretch preventing wave according to the present invention.

[Explanation of symbols]

 1 Corrugated steel pipe insulation cable 2 Conductor 3 Insulator 4 Wire core 5 Corrugated steel pipe insulation 6 Corrosion protection layer 7 Shape memory resin tape

Claims (1)

[Scope of utility model registration request] 1. A stretch-prevention corrugated steel pipe-insulated cable having a structure in which a tape-shaped material made of a shape memory resin is wound around the surface of the corrugated steel pipe-insulated cable.