JPH026401Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Background and Purpose of the Invention] The present invention relates to an accumulator for flat optical fibers in optical composite reel cables and the like.

A so-called cable accumulator is well known, in which a long cable is stored on a reel, pulled out and used as needed, and then wound onto the reel again after use. It is also used for fibers.

FIG. 1 is a sectional view of an example of such a conventional accumulator, in which a flat optical fiber cable 2 is wound around a central rotating shaft 3 and housed inside a fixed accumulator housing 1. . That is, one end of the optical cable 2 is fixed to the rotating shaft 3 side and connected to a reel cable (not shown), and the other end is fixed to the utilization device. The optical fiber cable 2 is generally constructed by molding a plurality of optical fibers into a sandwich-like shape using plastic tape, and is used by being wound around a rotating shaft 3 and unwound by rotation of a reel (not shown). In this case, uneven winding as shown by A may occur, especially during winding. If there is such uneven winding, the optical cable 2 that has been wound will suddenly fall downward or be folded as the shaft 3 rotates, causing damage to the cable and causing breakage of the optical fiber. There is a possibility that the optical transmission system may lose its function.

It is an object of the present invention to provide an optical fiber accumulator that eliminates the drawbacks of the conventional accumulator and does not cause damage to a long optical composite reel cable.

[Summary of the idea]

According to the present invention, a plurality of magnets are provided around the accumulator housing, and a magnetic material is added to the optical cable, and when the cable is wound, the cable is sequentially attracted to the inner surface of the accumulator housing and wound around the rotating shaft. The above objectives are achieved by: The present invention will be explained below with reference to embodiments shown in the drawings.

〔Example〕

FIG. 2 is a view similar to FIG. 1 showing an embodiment of the present invention, and FIG. 3 is a cross-sectional view of an optical cable suitable for use in the present invention.

In FIG. 2, for example, when using an optical cable 2 formed by juxtaposing a steel wire 6 with an optical fiber 4 as shown in FIG. At the same time as being pressed against the inner surface of the housing 1, the cable 2 is attracted to a plurality of magnets 5 arranged around the housing 1 and is sequentially stacked on the shaft 3, and the reverse occurs during unwinding. Since a tension T is always generated between the inner surface of the housing 1 and the inner surface of the housing 1, orderly winding and unwinding without uneven winding is possible.

The optical cable shown in FIG. 3a is constructed by placing a plurality of iron wires 6 in parallel with the optical fibers 4, but a soft magnetic tape 6' may be attached to the optical cable as shown in FIG. 3b. , or Figure 3c
A soft magnetic powder 6'' may be mixed into the cable 2 as shown in FIG.

[Effect of idea]

As described above, according to the accumulator of the present invention, it is possible to wind up and unwind optical cables in an orderly manner.
The cable is less likely to be damaged by shock, friction, etc., and a long reel cable can be realized. Furthermore, since there is no need to provide elasticity to the optical cable itself, and it is sufficient to simply provide magnetism, the cable can be made thin, and the accumulator itself can thereby be made smaller.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a conventional optical cable accumulator, Figure 2 is a diagram similar to Figure 1 of an embodiment of the present invention, and Figure 3 is a cross section of an example of an optical cable suitable for use in the present invention. It is a diagram. 1... Accumulator housing, 2... Optical cable, 3... Rotating shaft, 4... Optical fiber, 5...
...Magnet, 6,6',6''...Magnetic material.

Claims (1)

[Scope of utility model registration request] A magnetic material is applied to the optical fiber flat cable, and a magnet is arranged at an arbitrary position on the housing, and when the optical fiber flat cable is wound up, the optical fiber flat cable that is sequentially drawn into the housing is attracted to the inner surface of the housing. An accumulator for optical fiber cables that is characterized by being completely rounded.