JPH0243049Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Background and purpose of the invention] The invention relates to a composite cable that incorporates a power control cable core and a signal optical fiber cord, and is particularly suitable for flat type cables suitable as elevator cables. It concerns composite cables.

Figure 1 is a schematic diagram of a conventional elevator system.
is an elevator cage, 2 is a machine room, 3 is an elevator cable, and 4 is a junction box. Elevator cable 3 is a cable that collects multiple cables by function, such as power control cables and signal cables, into one. A common method is to use a plurality of circular cross-section cables. However, collective cables with a circular cross section tend to twist easily, and because they are relatively lightweight, they tend to swing easily.
Therefore, when such a cable is used and the elevator cable 3 is moved up and down as the elevator car 1 moves up and down, lateral vibration may occur due to wind pressure during movement, twisting habits remaining in the cable, etc. However, as shown in FIG. 2, the elevator cable 3' may fly out and get caught on structures in the hoistway while the elevator car 1 is running, damaging the elevator cable 3'.
This may cause an accident such as breakage.

This phenomenon also occurs in the case of the elevator cable 3 having a composite cable structure in which the signal cable core is replaced with a signal optical fiber cord in order to reduce the number of cables used.

As a composite cable that solves the problems of the above-mentioned composite cable for elevators with a circular cross section,
A flat cable structure has been proposed (Utility Model Publication No. 39-7924, Utility Model Application Publication No. 59-166314).

These flat composite cables have a conductor inside a flat sheath, and an opening with a width smaller than the outer diameter of the optical fiber cord provided in the longitudinal direction of the side surface of the flat sheath and an opening with a width smaller than the outer diameter of the optical fiber cord. The fiber optic cord is housed in a groove formed by a cavity having a large inner diameter. However, in these flat composite cables, if the width of the groove opening is made as small as possible compared to the outer diameter of the optical fiber cord in order to prevent the optical fiber cord from jumping out from the accommodation groove, the elevator Since the cable sheath material is hard, there is a drawback that it is difficult to attach and detach the optical fiber cord.
Furthermore, if the width of the opening of the groove is increased in order to facilitate attachment and detachment of the optical fiber cord, there is a drawback that the optical fiber cord is likely to jump out due to movement of the cable. Therefore, it is necessary to close the opening of the groove with a sealing material, etc., but there is a very high risk that the sealing material will peel off due to repeated movement of the cable, so if this is used as an elevator cable, the slack part Since the sealing member easily peels off due to large bending stress, it is unsuitable for use in elevator cables.

The present invention was developed in view of the above, and is a flat composite for elevators that allows the optical fiber cord to be easily attached and detached, and the optical fiber cord does not easily pop out from the cable body even when the cable is repeatedly moved up and down. The purpose is to provide cables.

[Summary of the invention] The invention consists of an opening with a width smaller than the outer diameter of the optical fiber cord in the longitudinal direction of both side surfaces of a flat sheath in which a cable core consisting of a plurality of conductors is housed, and an opening with a width smaller than the outer diameter of the optical fiber cord. In a flat composite cable for an elevator, the housing groove is provided with a housing groove having an inner diameter larger than the outer diameter, and the optical fiber cord is housed in the cavity of the housing groove. The gist is that cut grooves having a width larger than half the difference between the outer diameter of the optical fiber cord and the width of the opening are provided in parallel.

Hereinafter, one embodiment of the present invention will be described based on the drawings. Figure 3 is a cross-sectional view of a flat sheath with a cable core inside, Figure 4 is a cross-sectional view showing an optical fiber cord housed in the flat sheath shown in Figure 3, and 5 is a cross-sectional view of an optical fiber cord. , 6 is inclusion, 7 is
EP sheath, 8 is a cushion layer, 9 is a housing groove for holding the optical fiber cord 15, 10 is a cut groove provided parallel to the housing groove 9, 11 is a cable core 16
conductor, 12 is an insulator, 13 is an intervening jute, 1
4 is a braided cotton yarn braid, and 17 is a flat sheath.

In this embodiment, a housing groove 9 with cut grooves 10 arranged in parallel is provided on both side surfaces of a flat sheath 17 in which a cable core 16 is housed, and an optical fiber cord 15 is housed in this housing groove 9.

In this configuration, the accommodation groove 9 is provided in an expanding shape such that the opening width is narrower than the outer diameter of the optical fiber cord and the inner cavity has a circular cross section with an inner diameter larger than the outer diameter of the optical fiber cord. The structure is such that the housed optical fiber cord 15 is held so that it does not easily come off. Therefore, by making the width of the opening of the accommodation groove 9 as small as possible, the optical fiber cord 15 will not easily jump out of the accommodation groove 9 even if the cable is moved repeatedly. In addition, the attachment and detachment of the optical fiber cord 15 is as follows.
As is clear from FIG. 4, on both sides of the housing groove 9,
Cut groove 1 having a width larger than half the difference between the width of the opening and the outer diameter of the optical fiber cord 15
0, even if the width of the opening of the housing groove 9 is extremely small, the opening of the housing groove 9 can be expanded and the attachment/detachment operation can be easily performed. Further, the optical fiber cord 15 has a structure in which the optical fiber 5 and the inclusion 6 are covered with an EP sheath 7, and the periphery of several of the fibers is protected with a cushion layer 8, and the power control cable core 16 is An intervening jute 13 is placed in the center, a plurality of conductors 11 covered with an insulator 12 are arranged around the outer circumference, and a cotton thread braid 14 is placed on the outside.
By arranging the cable core 16 and the optical fiber cord 15 symmetrically within the flat sheath 17, it is possible to prevent the entire composite cable from becoming twisted. In addition, the foaming rate of cushion layer 8 is 80
By using ~90% polyethylene, silicone rubber, or polyurethane rubber, optical fiber 5
In addition, the optical fiber cord 15 can be easily protected and detached from the optical fiber cord 15.

[Effects of the invention] As explained above, according to the invention, it is possible to prevent the occurrence of twisting, which is a drawback of composite cables with a circular cross section, and moreover, it is possible to prevent the occurrence of twisting, which is a drawback of composite cables with a circular cross section. Making it easy to attach and detach the optical fiber cord by providing a cut groove;
Moreover, it is possible to simultaneously achieve the ease of attaching and detaching while preventing the optical fiber cord from popping out due to repeated cable movement, which is an excellent practical effect that could not be achieved with conventional composite cables. can be played.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a conventional elevator system, Figure 2
3 is a cross-sectional view of a flat sheath according to an embodiment of the present invention, and FIG.
FIG. 3 is a cross-sectional view showing a state in which an optical fiber cord is housed in the flat sheath shown in the figure. DESCRIPTION OF SYMBOLS 1...Elevator cage, 3...Elevator cable, 5...Optical fiber, 8...Cushion layer, 9...Accommodating groove, 10...Notch groove, 15...
...Optical fiber cord, 16...cable core.

Claims (1)

[Scope of utility model registration request] A cavity having an opening with a width smaller than the outer diameter of the optical fiber cord and an inner diameter larger than the outer diameter of the optical fiber cord in the longitudinal direction of both side surfaces of a flat sheath containing a cable core made of a plurality of conductors. In the composite cable, the optical fiber cord is accommodated in the cavity of the accommodation groove, and the outer diameter of the optical fiber cord and the width of the opening are arranged on both sides of the accommodation groove. 1. A flat composite cable for an elevator, characterized in that cut grooves having a width larger than one-half of the difference between the two are provided in parallel.