JPH05270B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention has a safety electric line, and in particular, when the safety electric line is cut off at the time of cable derailment, the equipment stops, and the safety electric line For example, the safety of an aerial cable conveyance facility includes a conductive rod of brittle material placed at the end of a cable guide roller, and this rod is broken by a fall of the cable and interrupts the safety electric line. Regarding equipment.

[Prior art and problems]

In transport facilities or tugboat facilities, especially in aerial cableways, ropeways, lifts, etc., it is absolutely necessary to cause an instantaneous stoppage of the facility in the event of cable derailment, and for this reason derailment detectors are placed near the cable holding rollers. However, this derailment detector is installed in the safety wire that runs along the facility, so that an interruption in the wire due to a cable derailment at any point will cause the facility to shut down. It is normal to do so. A known device of the above-mentioned type (French patent no. 2207478) includes a brittle rod of steel,
The rod is fixed on a support that simultaneously ensures its retention and its connection with the conductors of the safety line. A falling cable causes the rod to break and the safety wire to be cut off. Replacement of the destruction rods before the facility is put back into operation is carried out at the support level, and this replacement operation is rapid and inexpensive. These installations are exposed to harsh operating conditions in alpine areas, resulting in poor connections between rods and supports.
This often causes facilities to shut down unexpectedly, making it difficult to investigate and repair the cause.

[Object and effect of the invention]

The object of the present invention is to correct these drawbacks and to realize a reliable and highly reliable safety device.

The safety device according to the invention is characterized in that the rod comprises an electrically conductive molded material connected to a rod support, and the exposed portion of the connecting conductor of the safety wire is embedded in the electrically conductive material during molding. will be accomplished.

The rod, the support and the ends of the connecting conductors form a monoblock assembly, the integrity of which is unaffected by the conditions of use, in particular vibrations, changes in temperature and humidity. In particular, only a break in the rod during a falling cable will destroy the electrical connection and result in an outage of the facility.

The conductive material is preferably a resin containing carbon powder poured into a glass tube forming an insulating protective case. This glass tube is bent into a U shape,
By embedding the mutually adjacent free ends of the shape in an insulating resin block for connection to a sleeve-like support, a fully insulated, compact and rigid assembly is achieved. The conductors are coated with insulation, which extends into the interior of the insulation block to prevent discontinuities in the insulation.

〔Example〕

Hereinafter, embodiments of the present invention shown in the drawings will be described in detail.

In the accompanying figures, a safety rod, indicated generally at 10, is fixed on the side plate 12 of the cable rocking arm (not shown). The rocking arm may be of the type described in the above-mentioned patent; reference is made to that patent for details of this type of safety device. The side plate 12 has a hole into which a support in the form of a cylindrical insulating sleeve 14 is inserted with a slight play, and two screws screwed onto the external threads of this sleeve 14 are inserted. Side plate 12 between nuts 16 and 18
is being held. The sleeve 14 is closed on one side by a bottom 20 which has two orifices for passing the two conductors 22,24. Conductor wires 22, 24 insulated with insulation coating
are advanced into the sleeve 14 and their exposed ends 26, 28 are each inserted into one end of a U-shaped glass tube 30 and embedded in the shaped conductive material 32 that fills the glass tube. ing. These ends 26, 28 extend into the material 32 a sufficient length to form a good conductive connection. The conductive material 32 is a resin loaded with carbon powder, which resin is poured into the glass tube 30 after the conductive wires 22, 24 are placed. After the resin 32 is cured,
The glass tube 30-resin 32 assembly constitutes a brittle conductor whose rupture interrupts the electrical connection between conductors 22 and 24. The end of the leg of the U-shaped glass tube 30 enters the support sleeve 14 from the open bottom on the side opposite the bottom 20 of this sleeve 14 .
It is embedded in an insulating material 34 filled with.

FIG. 2 shows the filling of sleeve 14 by pouring insulating material 34. FIG. This insulating material 34 may be an epoxide resin or any other equivalent material. After the insulating material 34 has hardened, the rod tube 30, support sleeve 14 and conductors 22, 24 are removed.
The distal end of the rod forms a rigid block which is replaced as a single block after the rod is broken. The conductors 22, 24 are connected to a safety line (not shown) by conventional terminals or connecting wires. The production of this safety rod is simple and
Glass tube 30 and sleeve 14 form a mold for pouring materials 32 and 34.

The glass tube 30 forms an insulating and brittle protective envelope, and all conductive members 22, 24, 32 are encapsulated and embedded in a hard insulating material to ensure their mechanical retention and insulation properties. and prevent accidents.

The conductive material 32 can be poured into a conventional mold, coated after demolding, or encapsulated in a brittle insulating case, and the structure of the support sleeve is within the scope of the invention. Obviously, changes can be made within.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a safety rod according to the invention in an installed position, and FIG. 2 is a cross-sectional view of the safety rod during manufacture. 14... Sleeve, 16, 18... Natsu, 2
2, 24... Conductor wire, 26, 28... Conductor end, 3
0... Glass tube, 32... Conductive material, 34...
Insulating resin.

Claims (1)

[Claims] 1. A U-shaped conductor rod disposed near the cable guiding pulley so as to be ruptured by an impact when the cable derails from the cable guiding pulley;
In a safety device for an aerial cable transport facility, the ends of the shaped conductor rod are inserted into an insulating support and electrically connected to the wires of the safety circuit, and the transport facility is stopped when the safety circuit is disconnected. U
The shaped conductor rod has a rupturable insulating tube filled with an electrically conductive and rupturable synthetic resin, and the exposed end of the wire is inserted and molded into the synthetic resin of the insulating tube to form an electrical connection. The insulating support has an opening into which both ends of the U-shaped conductor rod are inserted, and this opening is filled with an insulating synthetic resin to connect the insulating support and the U-shaped conductor rod.
A safety device for an aerial cable conveyance facility, characterized in that the shaped conductor rod and the end of the electric wire constitute an integrally molded product. 2. The safety device for an aerial cable conveyance facility according to claim 1, wherein the insulating tube is a glass tube, and the conductive synthetic resin contains carbon powder.