JPH0430731Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Background and purpose of the invention] The present invention relates to an optical composite cable, more specifically, to an optical composite cable that combines a power control cable and a signal cable, and is particularly applicable to elevator cables. The present invention relates to an optical composite cable with a new structure suitable for use.

Prior to explaining the present invention, the schematic structure of the elevator system will be explained based on FIG. 4. In the figure, 1 is an elevator pit, 2 is a machine room installed above the elevator pit 1, and 3 is a pit. 1
An elevator car is raised and lowered through a wire rope 4, 5 is an elevator cable, and 6 is a junction box for the cable 5.
As the elevator cable 5, power control cables and signal cables are grouped according to their functions to form one circular cross-section collective cable, and a plurality of these circular cross-section collective cables are used.

However, as mentioned above, collective cables with a circular cross section have the disadvantage that they are easy to twist and are easy to swing because they are relatively lightweight. Therefore, when these collective cables with a circular cross section are used for the elevator cable 5, As the elevator car 3 moves up and down via the rope 4, twisting occurs in the cable 5, and furthermore, due to the wind pressure lateral vibration caused by the movement of the car 3, this phenomenon is indicated by reference numeral 5' in Fig. 5. As shown in the figure, a part of the cable 5 may pop out, and if the cable 5' protrudes to a large extent, the protruding cable 5' may be pulled into a structure in the elevator pit 1 while the car 3 is running. This may cause the cable to become caught, resulting in cable damage or breakage.

In addition, one of the signal cables of the power control cable and the signal cable that constitute the elevator cable 5 is replaced with an optical cable, and this and the power control cable are combined to form a so-called optical composite cable, and the elevator Although attempts have been made to reduce the number of cables 5 used,
Even with conventionally used optical composite cables,
The reality is that they are not sufficiently effective in preventing cables from becoming twisted.

The present invention was developed in consideration of the above points, and its purpose is to prevent the occurrence of twisting, which has been a problem with conventional elevator cables, and to prevent damage and breakage of the cable. This is an optical composite cable with a new structure that is different from conventional ones.It is not only possible to prevent this, but it is also highly economical, and it is also extremely easy to connect and disconnect the optical cable (signal cable) to the power control cable. This is what we are trying to provide.

[Summary of the invention] In order to achieve the above object, the optical composite cable according to the invention includes a flat cable sheath in which a cable core unit is embedded, a groove for fitting the optical cable unit in the longitudinal direction on both sides, an optical fiber cord and reinforcement. A pair of left and right optical cable units with wires buried in parallel are combined, and the reinforcing wire buried portions of each optical cable unit are removably fitted into the optical cable unit fitting grooves provided on both sides of the flat cable sheath in the longitudinal direction. It is characterized by:

[Example] Hereinafter, the present invention will be explained based on an embodiment shown in Figs. 1 to 3. Fig. 1 is a cross-sectional view showing the overall configuration of the optical composite cable according to the present invention, and Fig. 2 is a cross-sectional view showing the overall structure of the optical composite cable according to the present invention. is a cross-sectional view showing only the flat cable sheath with a built-in cable core unit taken out from the optical composite cable shown in Figure 1, and Figure 3 is a cross-sectional view showing only the optical cable unit taken out from the optical composite cable shown in Figure 1. It is a diagram.

In FIG. 1 showing the overall configuration of the optical composite cable, 7 is a cable core unit 8 having a configuration to be described later.
A vinyl flat cable sheath with optical cable unit fitting grooves 9 located in the longitudinal direction of both sides of the flat cable sheath 7 in the illustrated embodiment, as shown in FIG. In the direction, parallel to the optical cable unit fitting groove 9,
Two cut grooves 10, 10 are provided respectively.

In FIG. 1, reference numerals 11 and 11 denote a pair of left and right optical cable units in which an optical fiber cord 12 and a reinforcing wire 13 each having a configuration described later are buried in parallel, and each optical cable unit 11 is, as shown in FIG. It is roughly shaped like a gourd,
The small circular portion of the optical cable unit 11 in which the reinforcing wire 13 is embedded is removably fitted into the groove 9 of the flat cable sheath 7.

As shown in FIG. 2, the cable core unit 8 embedded in the flat cable sheath 7 consists of a conductor 14, an insulator 15, an inclusion 16, a rough winding 17, etc. A plurality of wire cores, each of which has a conductor 14 covered with an insulator 15, are twisted around the outer periphery of the object (for example, a jute) 16, and a coarse winding is placed on the outside of the wire core to prevent the twisted wire core from breaking. 17 has been applied.

Further, as shown in FIG. 3, the optical fiber cord 12 embedded in the optical cable unit 11 consists of an optical fiber 18, an inclusion 19, a cushion layer 20, a polyethylene sheath 21, etc. For example, Kevlar) 19
are protected by a cushion layer 20 (for example, polyethylene, silicone rubber, polyurethane) and covered with a polyethylene sheath 21.

The present invention is as described above, and in the present invention, optical cable units 11, 11, each having a reinforcing wire 13 buried therein, are fitted in the flat cable sheath 7, which is located on both sides of the flat cable sheath 7 in which the cable core unit 8 is buried. As a result, the twist prevention effect of the optical composite cable formed entirely in a flat plate shape is further enhanced by the reinforcing effect of the reinforcing wires 13, 13 arranged symmetrically on both the left and right sides of the sheath 7, Therefore, when the above-mentioned optical composite cable is used as an elevator cable, when the elevator car runs, as in the past, the twisting of the cable and the wind pressure lateral vibration caused by the movement of the elevator car cause As shown by reference numeral 5' in FIG. 5, a part of the elevator cable 5 does not jump out, and damage or breakage of the cable in the elevator pit can be prevented.

In addition, in the present invention, since the optical cable unit 11 in which the optical fiber cord 12 is buried is made detachable from the flat cable sheath 7 in which the cable core unit 8 is buried, the optical fiber cord 12 can be easily attached to the flat cable sheath 7 in which the cable core unit 8 is buried. If it is necessary to replace the optical composite cable, it is only necessary to replace the optical cable unit 11 without replacing the entire optical composite cable, which is economical.

Furthermore, in the present invention, when attaching the optical cable unit 11 in which the reinforcing wire 13 and the optical fiber cord 12 are buried in parallel to the flat cable sheath 7, the reinforcing wire 13 is inserted into the groove 9 provided in the longitudinal direction of the side of the sheath 7. Since the outer periphery of the coating is simply fitted into the outer periphery of the cover, the attachment/detachment operation is extremely simple, and there is no risk that the optical fiber cord 12 installed in parallel with the reinforcing wire 13 will be greatly distorted and the optical fiber 18 will be disconnected. As shown in the illustrated embodiment, if cut grooves 10 are provided in the longitudinal direction on both sides of the flat cable sheath 7 in parallel with the optical cable unit fitting groove 9, it will be easier to attach and detach the optical cable unit 11 to and from the sheath 7. Since the strip (indicated by reference numeral 7a) formed between the grooves 9 and 10 elastically expands outward, the operation of attaching and detaching the optical cable unit 11 to and from the sheath 7 can be performed more smoothly.

[Effect of the invention] As is clear from the explanation of the illustrated embodiments above,
The present invention not only prevents the occurrence of twisting, which has been a problem with conventional elevator cables, and prevents damage and breakage of the cables, but also has excellent economical efficiency. It is possible to obtain an optical composite cable with a new structure different from that of the conventional one, which allows the operation of attaching and detaching the power control cable to and from the power control cable very easily.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the optical composite cable according to the present invention, Figure 1 is a cross-sectional view showing its overall configuration, and Figure 2 is a cable line from the optical composite cable shown in Figure 1. Fig. 3 is a cross-sectional view showing only the flat cable sheath with a built-in core unit taken out, Fig. 3 is a lateral end view showing only the optical cable unit taken out from the optical composite cable shown in Fig. 2, and Fig. 4 is a cross-sectional view showing only the optical cable unit taken out from the optical composite cable shown in Fig. 2. FIG. 5 is a diagram illustrating the cause of an accident that may occur in an elevator system using conventional cables. DESCRIPTION OF SYMBOLS 1... Elevator pit, 3... Elevator cage, 5... Elevator cable, 7... Flat cable sheath, 7a... Strip, 8... Cable core unit, 9... Cable fitting groove, 10... …
Cut groove, 11... Optical cable unit, 12...
Optical fiber cord, 13... Reinforcement wire, 14... Conductor, 15... Insulator, 16... Inclusion, 17...
Coarse winding, 18... Optical fiber, 19... Inclusion,
20...Cushion layer, 21...Polyethylene sheath.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A pair of left and right cable sheaths in which a cable core unit is buried, a flat cable sheath having grooves for fitting the optical cable unit in the longitudinal direction on both sides, and an optical fiber cord and reinforcing wire are buried in parallel. An optical composite comprising a combination of optical cable units, and a reinforcing wire embedded portion of each optical cable unit is removably fitted into the optical cable unit fitting groove provided on both sides of the flat cable sheath in the longitudinal direction. cable. (2) In the invention described in claim 1 of the utility model registration claim, there is provided an optical composite in which cut grooves are provided in the longitudinal direction of both sides of a flat cable sheath in which a cable core unit is embedded in parallel to the groove for fitting the optical cable unit. cable.