JPS6057645B2 - communication cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a communication cable incorporating a magnetic tape.

Conventionally, in many cases, information such as the specifications of the cable, the manufacturing rod number, and the manufacturer's name are printed and displayed on the outer cover surface of communication cables and the like.

However, trying to write a lot of information on the surface of the cable jacket complicates the structure of the printing machine, and
The information becomes complicated and the appearance becomes unsightly.Also, if the cable jacket is made of non-adhesive material such as polyethylene, printing ink will be difficult to adhere to, and even if it does, it will cause damage. There was a problem that it was easy to disappear.
This invention was made based on the above background, and its purpose is to incorporate a magnetic tape into a communication cable, record information on this magnetic tape, and transmit the information when installing the cable. The purpose is to obtain the necessary information by retrieving the information.

The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 shows a first embodiment of the present invention, in which a magnetic tape 2 recording necessary information (specifications, manufacturing rod number, manufacturer name, etc.) is attached vertically to a cable core 1. A sheath 3 is formed by melting and extruding a plastic material on top of the cable core 1 and the sheath 3, and a magnetic tape is placed between the cable core 1 and the sheath 3 in a portion close to the surface (thickness that can be read from the cable surface by a magnetic head, etc.). 2 is embedded in the communication cable.

In the example shown in FIG. 1, one (or more than one) magnetic tape 2 is disposed along the length of the cable as shown, and this magnetic tape 2 carries a digital signal (e.g. Barcodes) S are recorded at equal pitches.

FIG. 2 shows a second embodiment of the present invention, in which a magnetic tape (metal tape or other metal-based tape may also be used) 4 is wrapped around the cable core 1 to fill the gap in the length direction of the cable. At the same time, the above-mentioned information is recorded as a signal S in the length direction of the cable.

Furthermore, at this time, a wide magnetic tape 4 may be placed vertically on top of the cable core 1 to cover the entire circumference to provide a magnetic shielding effect. In the first and second embodiments, the signal S recorded on the magnetic tapes 2 and 4 may be an analog signal instead of a digital signal, and the necessary information may be recorded magnetically after the outer sheath 3 is formed. It is not limited to recording on tapes 2 and 4.

Information on the cable configured as described above is read by bringing a reading device such as a magnetic head close to the surface of the jacket 3 and running the cable relatively.

That is, when laying a cable, the cable is fed out through a reading device and the cable specifications recorded at regular intervals are called up and confirmed, and at the same time the number of repeated signals is counted and the counted signal is used. Therefore, it becomes possible to control the length of the cable to be fed out and to stop the cable from being fed out at the set length. Furthermore, it becomes easy to control the length using another signal different from the repetition signal, or to automatically detect the boundary between cables with different specifications when they are connected into one cable.

As described above, since the communication cable of the present invention has the magnetic tape inserted between the cable core and the outer sheath along its longitudinal direction, the magnetic tape is covered by the outer sheath and is not exposed. In addition to obtaining a good appearance, the recorded information can be stored semi-permanently because it is not damaged by friction or the like even when the magnetic head for reading is repeatedly moved.

Further, in manufacturing the magnetic tape, a plastic material is extruded onto the magnetic tape so that an outer cover can be placed on the magnetic tape, which has the advantage of being easy to manufacture.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the invention, and FIG. 2 is a perspective view showing a second embodiment of the invention. 1...Cable core, 2...Magnetic tape, 3...Outer cover, 4...Magnetic tape (
metal tape, etc.).

Claims (1)

[Claims] 1. A communication cable characterized in that a magnetic tape is inserted between the cable core and the outer sheath along its longitudinal direction.