JP2000001277A - Laying method for coaxial cable for crime preventing camera in elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laying method for a coaxial cable for a crime preventing camera in an elevator which can restrain oscillation due to movement. SOLUTION: A laying method for a coaxial cable for a crime preventing camera in an elevator is carried out in such a way as after forming of a large diameter part 15A so as to enclose a coaxial cable 2 with a winding wire 15, a middle twisted part 15B is formed and then wound round a tail cord and twisted as many as several turns for fastening and fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method of laying a coaxial cable for a security camera of an elevator.

[0002]

2. Description of the Related Art Generally, in an elevator, a lower portion of a car is connected to a control panel of a machine room by a tail cord, and the car side of the tail cord is configured to follow the elevation of the car. Have been. A coaxial cable for a security camera, which is a new cable, may be laid along the tail cable, which is an existing cable. A conventional laying method will be described with reference to FIG.

First, in step S1, as a first step, a position for fixing the coaxial cable 2 to the tail cord 1 is determined.
The binding wire 3 surrounds the coaxial cable 2. Next, as step S2, the bind wire 3 is twisted several times on the tail cord 1 side of the coaxial cable 2 and fastened and fixed to the coaxial cable 2. Thereafter, in step S3, the bind wire 3 is wound around the tail cord 1 and twisted and fixed several times. Next, an unnecessary end of the bind line is cut off with pliers (not shown), and an end process of bending the end of the bind line 3 along the outer periphery of the tail cord 1 is performed in step S4. Such a fixing operation is performed at predetermined intervals along the longitudinal direction of the tail cord 1 to fix the coaxial cable 2 to the tail cord 1.

[0004]

However, in the conventional laying work, the tail cord 1 and the coaxial cable 2 having different cross-sectional areas are connected with the binding wire 3 at predetermined intervals along the longitudinal direction of the tail cord 1. Since the tail cord 1 and the coaxial cable 2 having different minimum bending radii are connected at a predetermined interval, the tail cord 1 is adversely affected. That is, the tail cord 1 moves while maintaining a constant bending radius as the elevator car moves up and down, and the connected coaxial cables 2 having different bending radii affect this. For this reason, the swing of the tail cord 1 and the coaxial cable 2 connected to each other is increased, and there is a possibility that the tail cord 1 and the coaxial cable 2 may come into contact with a protrusion in the hoistway.

It is an object of the present invention to provide a method of laying a coaxial cable for a security camera of an elevator, which can suppress the swing caused by the movement.

[0006]

According to the present invention, in order to achieve the above object, a coaxial cable of a security camera provided in a car has one end attached to the lower end of the car and the other end provided in a hoistway. In the method of laying a coaxial cable for a security camera of an elevator, wherein the coaxial cable is attached to a tail cord connected to a terminal box with a binding wire, a large diameter portion is formed so as to surround the coaxial cable with the binding wire, and then the intermediate twisting is performed. The tail cord is formed, and thereafter, it is wound around the tail cord, and twisted and fixed several times.

As described above, since the large-diameter portion is formed on the bind wire and the coaxial cable is supported by the large-diameter portion, even if the bending radius is different, the movement of the coaxial cable adversely affects the bent portion of the tail cord. Without giving, the swing accompanying the movement can be suppressed.

Further, in the present invention, a cylindrical body having a slit having a larger diameter than the coaxial cable is fitted into the coaxial cable, and a bind wire is wound around the cylindrical body to form a large diameter portion. I have to do it.

As a result, a large-diameter portion having the same diameter can be easily formed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of an elevator shaft adopting a method of laying a coaxial cable for a security camera of an elevator according to an embodiment of the present invention.

In the hoistway 4, a balancing weight 5 and a car 6, which are moving bodies, are connected by a hoisting machine via a rope 7 having an intermediate portion wound around the hoisting machine. A control panel 9 incorporating an elevator control circuit is installed in a machine room 8 above the hoistway 4. Terminals (not shown) of the control panel 9 and a terminal box 10 fixed to an intermediate portion of the hoistway 4 are shown. The terminals that are not connected are connected by a cable 11. Terminal (not shown) and terminal box 10 at the lower part of car 6
The terminals (not shown) are connected by a tail cord 1. A security camera 12 is mounted in the car 6, and the security camera 12 is connected to a video deck 13 provided in the machine room 8 by a coaxial cable 2 for transmitting captured images. Here, as the video deck 13, a time-lapse video deck or the like that performs frame shooting at predetermined time intervals is used.

Next, a laying operation when laying the coaxial cable 2 will be described.

The coaxial cable 2 is laid once from the upper part of the car 6 to the lower part of the car 6, and is then held by a plurality of binding wires 15 along the tail cord 1 provided at the lower part of the car 6. Let it. In the terminal box 10, the coaxial cable 2 is fixed with a binding band or a binding wire, and then the coaxial cable 2 is attached to a cable holder (not shown) for holding the cable 11 or a bracket (not shown) installed on the hoistway 4 by using the binding band. The cable 2 is laid to the machine room 8 while being held at a plurality of locations along the cable 11. Thereafter, both ends of the coaxial cable 2 are connected to the television camera 12 and the video deck 13, respectively.

FIGS. 2 and 3 are enlarged perspective views showing one embodiment of a method of laying the binding wire 15. FIG.

In FIG. 1, reference numeral 16 denotes a slit 1 having an inner diameter larger than the diameter of the coaxial cable 2. For example, if the diameter of the coaxial cable 2 is 1 cm, the slit 1 has an inner diameter of 1.5 cm.
7 is a cylindrical body formed.

In laying the binding wire 15, first, the cylindrical body 16 is opened with the slit 17 to open the coaxial cable 2.
Then, a plurality of (six in this example) bind wires 15 are wound around the tubular body 16 and twisted several times to form an intermediate twisted portion 15B. After a while, the cylindrical body 16 one by one
3 and wound around the tail cord 1 at a predetermined interval as shown in FIG. Finally, the tubular body 16 is removed from the coaxial cable 2 and the operation is completed.

According to the binding wire 15 having such a configuration, the tail cord 1 and the coaxial cable 2 having different bending radii also have bent portions ascending and descending as the car 6 moves up and down. Even if the lateral force acts on the bent portion of the tail cord 1 due to the movement, the coaxial cable 2 moves in the longitudinal direction in the large diameter portion 15A of the bind wire 15 due to the reaction of the force applied to the tail cord 1. Since the tail cord 1 and the coaxial cable 2 are integrally fixed as in the related art, the tail cord 1
It does not increase the swing of the robot.

Further, in the present embodiment, the cylindrical body 16 is used in order to easily form the large diameter portion 15A, but the same effect can be obtained by forming the large diameter portion 15A by another method.

[0020]

As described above, according to the present invention, the movement of the coaxial cable does not adversely affect the bent portion of the tail cord, and the swing caused by the movement is suppressed so that the coaxial cable can be moved along the tail cord. Can be laid.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an elevator employing a method of laying a coaxial cable for an elevator security camera according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part showing one embodiment of the present invention.

FIG. 3 is an enlarged perspective view of a main part of a coaxial cable and a tail cord shown in FIG. 1;

FIG. 4 is an explanatory view showing a conventional cable laying operation procedure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tail cord 2 Coaxial cable 4 Hoistway 6 Car cage 10 Terminal box 12 Security camera 13 Video deck 15 Bind wire 15A Large diameter part 16 Tubular body 17 Slit

Claims (2)

[Claims] A coaxial cable of a security camera provided in a car is attached to a tail cord connected to a terminal box provided at one end to a lower end of the car and the other end to a hoistway with a bind line. In the method of laying a coaxial cable for a security camera of an elevator according to the present invention, after forming a large-diameter portion so as to surround the coaxial cable with the binding wire, an intermediate twisted portion is formed, and then the cable is wound around the tail cord. A method of laying a coaxial cable for a security camera for an elevator, wherein the cable is twisted and fixed several times. 2. A cylindrical body having a slit having a diameter larger than that of the coaxial cable is fitted to the coaxial cable, and a bind wire is wound around the cylindrical body to form the large diameter portion. 2. The method of laying a coaxial cable for a security camera for an elevator according to claim 1, wherein: