JPH02223326A - Protective device for elevator cable - Google Patents

Abstract

PURPOSE:To prevent optical fibers from being broken or from causing transmission loss by arranging a protective member to control the bending diameter of a composite cable to the bending position such as the suspension stop section or excess length processing section of the composite cable. CONSTITUTION:In laying a cable for an elevator a cylinder member 18a, the protective member 18, is arranged to a suspension stop section 12 and an excess length processing section 16 of a composite cable 17. Through the circular surface of this cylinder member 18a the composite cable 17 is bent, while a corner member 18d is arranged to a corner section 19 of the building against which the composite cable 17 abuts so that the composite cable 17 will abut against the circular surface of the corner member 18d and will not be directly brought into contact with the acute-angled corner section 19 of the building. Consequently in laying the composite cable 17, the bending diameter at the bending position where the composite cable is called for being bent is controlled by the circular surface having a curvature without phototransmission loss of the protective member 18. The breakage or transmission loss of optical fibers can thereby be prevented.

Description

[Detailed description of the invention] [Industrial application field]

This invention provides an elevator cable maintenance device in which a composite cable having optical fiber cores is laid so as to electrically connect an elevating object such as an elevator car to a control panel that controls the elevating object. It is related to.

[Conventional technology]

FIG. 5 is a longitudinal cross-sectional view of a hoistway showing a state in which a conventional elevator cable is laid, as disclosed in, for example, Japanese Patent Publication No. 61-48328. In Fig. 5, 1 is a control panel;
This control panel 1 is installed on a floor duct 4 formed in a machine room 3 located above an elevator hoistway 2. Further, in the machine room 3, a hoist 8 and a deflection wheel 9 for moving the car 5 and the counterweight 6 via a rope 7 are installed. 10 is a cable that electrically connects the control panel 1 and the equipment of the car 5; 11 and 12 are pipes provided on the lower frame of the car 5 and the wall of the hoistway 2 to support the load of the cable 10; The cable 10 is bent into a U-shape and wrapped around the suspension parts 11 and 12 to be supported and fixed with cable clips 13 and 14. It has become. Reference numerals 15 and 16 refer to extra length processing ends where the cable 10 is bent into a curved shape on the lower side of the car 5 and on the floor duct 4 side, and these processing parts 15 and 16 allow the i-equipment on the car 5 side to be bent. The load on the connector parts 15a and 16a between the control panel 1 and the cable 10 is reduced.

[Problem to be solved by the invention]

Recently, elevator car circle indicators have become more diverse. In order to process a large amount of information with the increasing number of functions, composite cables in which optical fiber cores are H-joined to elevator cables are being used. Therefore, when an optical fiber composite cable is laid by the conventional elevator cable laying method as described above, the suspending parts 11 and 12 of the cable 10, the bottom of the car 5, and the floor of the bottom of the cooking board 1 are If the bending diameter of the cable to be bent becomes smaller in the cable surplus length processing portions 15 and 16 formed in the duct 4, etc., the transmission loss of light flowing through the optical fiber core will increase, which will seriously impede elevator control. This will affect the Furthermore, in the worst case, the optical fiber core may break due to bending of the cable, making optical transmission completely impossible. This invention is an attempt to solve the above-mentioned problems, and in the installation of elevator cables using optical fiber composite cables, bending of the bent portions of the cables at the suspension portions and surplus length processing portions of the cables, etc. Maintain diameter 51
An object of the present invention is to provide a protection device for an elevator cable that prevents transmission loss or breakage of the cable by regulating the members.

[Means to solve problems] The protective bag M for elevator cables of the present invention is designed to prevent the bending diameter of the composite cable from being bent at bending positions such as the suspension part and the excess length processing part of the composite cable when laying the composite cable in which optical fiber cores are combined. A regulating member is provided. [Effect]

The elevator cable maintenance device of this invention has the following features:
The protection member can regulate the bending diameter of the cable at the bending position such as the suspension part or the extra length processing part of the cable to a bending diameter that does not cause optical transmission loss of the optical fiber core, thereby preventing interference with optical transmission in the optical fiber. It is possible to suspend the optical fiber without any problem and to process the excess length, and also to prevent breakage accidents due to bending of the optical fiber core.

【Example】

Hereinafter, embodiments of the invention of B will be described with reference to the drawings. FIG. 1 is a longitudinal cross-sectional view of a main part of a hoistway showing an embodiment of the 1-pull protection device for an elevator according to the present invention. In the figure, the same reference numerals as those in FIG. Control panel 1 of machine room 3 via the connection part
and electrically connected to the connection part of the car equipment. 18 is the suspension part 1 of the composite cable 17
This is a protective member made of plastic or foamed polystyrene used at bent positions such as 2 and the extra length processing portion 16, and this protective member 18 has an internal hollow φA of about φ60 as shown in FIG. 2(a). Short cylindrical member 18
a1 A short cylindrical member 18b as shown in FIG. 2(b)
and a corner member 18d in which a notch 18c is formed to match the corner of the building shown in FIG. 2(e). The cylindrical member 18a and the corner member 18d
The curved outer surface of the optical fiber core of the composite cable 17 is formed to have a curvature having a bending diameter that causes no transmission loss, as determined by measuring the optical transmission loss when the optical fiber core of the composite cable 17 is bent. It should be noted that the configuration other than the above in the embodiment B is the same as the conventional one shown in FIG. 5, and will therefore be omitted. According to the embodiment of the present invention configured as described above, when laying an elevator cable, the composite cable 17
A cylindrical member 1811, which is a protection member 18, is disposed in the suspension part 12 and the extra length processing part 16, and the cylindrical member 1 of
8a circle! The composite cable 17 is bent through the IIX plane, and a corner member 18d is provided at the corner 19 of the building where the composite cable 17 contacts, and the composite cable 17 contacts the arcuate surface of the corner member 18d. This prevents direct contact with the sharp corners 19 of the building. Therefore, according to the embodiment of the present invention, when laying a composite cable, the bending diameter at the bending position where the composite cable needs to be bent is regulated by the arcuate surface of the protective member 18 having a curvature without optical transmission loss. In addition to being able to prevent optical fiber breakage or transmission loss, the protective member 18 is lightweight because it is made of styrofoam and does not add any load to the composite cable. It is possible to easily match the corner part 19 of the building by on-site processing. 3 and 4 respectively show other embodiments of the protection member of the present invention. FIG. 3 shows a cylindrical member 18a which is the protection member 18, with flanges 20 formed at both ends in the axial direction, The engagement with the composite cable 17 becomes reliable. Further, the protection member 18 shown in FIG. 4 has a guide groove 21 formed on the arcuate outer surface of the cylindrical member 18a, and as in FIG. 3, the engagement with the composite cable can be made more reliable. In the above-mentioned embodiment, the protection member 18 is engaged with the composite cable by simply fitting the protection member 18 to the inside of the bent portion of the composite cable in the extra length processing section, and sandwiching the protective member 18 between the bent portions of the composite cable. However, it goes without saying that the cylindrical member 18a may be held on a wall or the like with a fixing string or the like. Furthermore, although the protection member 18 is shown as having a cylindrical or cylindrical shape, it is sufficient that only the contact surface with the composite cable is formed with a curved surface having a curvature that does not cause transmission loss or breakage. It does not need to be cylindrical. Furthermore, the composite cable may be a round cable or a flat cable, and it goes without saying that it can also be applied to fixed wiring cables.

【Effect of the invention】

As described above, according to the present invention, when laying a composite cable, the optical fiber core is bent at a bending position such as a suspension part or an extra length processing part of the cable to avoid transmission loss or breakage. Since the configuration includes a protective member that regulates the diameter, it is possible to suspend the optical fiber and handle excess length without causing any problems with optical transmission, and it also prevents elevator control in the event of an optical fiber core breakage accident. This has the effect of preventing serious adverse effects on Furthermore, the optical fiber composite cable can be easily installed and the installation time can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing the main part of a hoistway according to an embodiment of the present invention, and FIGS. 3 and 4 are perspective views showing modified examples of the protection member showing other embodiments of the present invention, and FIG. 5 is a vertical cross-sectional view of a hoistway showing a state in which a conventional elevator cable is laid. 1 Control panel, 2 Hoistway, 3 Machine room, 4 Floor duct,
11--Suspension part, 12--Excess length processing part, 17-Composite cable, 18-Protection member, 18d Cylindrical member, 18
b-...Cylindrical member, 18d...Corner member, 19 Corner part. Note that the same reference numerals in the figures indicate the same or equivalent parts. Figure 1

Claims (1)

[Claims] In an elevator cable in which a composite cable consisting of optical fiber cores is laid to electrically connect an elevating object such as an elevator car and a control panel that controls this elevating object, the excess length of the above-mentioned composite cable A protection device for an elevator cable, characterized in that a protection member for regulating the bending diameter of the composite cable is provided at a bending position such as a processing section.