JPH081964Y2 - Wire turnbuckle safety device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field] The present invention relates to a wire turnbuckle used for an overhead wire detention point of an electric railway, and is intended to prevent the damage from spreading when a screw rod of the wire turnbuckle breaks. is there.

[Prior Art] Explaining with an example of a compound catenary, as shown in FIG. 2, three lines of a suspension overhead wire M, an auxiliary suspension overhead wire A, and a trolley wire T are arranged from top to bottom. The ends of the auxiliary suspension wire A and the trolley wire T are locked to both ends of the triangular yoke Y1. The yoke Y1 is attached to one end of the yoke Y2 via a retaining wire, and the suspension wire M is connected to the yoke Y2.
The other end of Y2 is locked. The top of the yoke Y2 is connected to the tension balancer via an insulator. Above 3 lines M, A, T
Is applied with tension by a tension balancer, but in order to adjust the tension applied to each wire, both the auxiliary suspension wire A and the trolley wire T are connected via wire turnbuckles B1 and B2.
Locked to the yoke Y1. As is well known, the wire turnbuckle is one in which left and right screw rods are screwed and inserted from both sides of a central tube body. However, wire turn buckle B1, B2
Is provided at a position where it does not come into direct contact with the pantograph by a structure called an air joint and an air section. That is, as shown in FIG. 3, the above-mentioned three wires are pulled up near the locking portion, and the wire turnbuckle is attached to this pulling portion. At that time, power is supplied by another line (shown by a dotted line) parallel to the certain section.

In the unlikely event that the wire turnbuckle breaks, the broken part hangs down and contacts the pantograph, destroying the section of the overhead wire structure until the vehicle stops.

It is not only the trolley wire at the lowest position among the three wires that may cause a conflict with the pantograph due to the sagging of the breakage. If the wire turnbuckle of the auxiliary suspension wire also breaks, the first yoke Y1 that loses the balance of tension falls to the side, and in this case also, the broken screw rod may cause a conflict.
The auxiliary suspension wire or trolley wire that has lost the stopping force of the yoke Y1 due to breakage flows to the side opposite to the yoke Y1 and causes slack to increase damage.

[Means for Solving Problems] The wire turnbuckles of the two wires A and T each have a yoke Y at one end.
It is locked at 1. The fracture occurs near the holes of the left and right screw rods protruding from the screw holes of the central tube of each wire turnbuckle. Therefore, no matter which screw rod is broken by the wire turnbuckle of the upper and lower wires, the elastic body connecting the upper and lower wires is provided on the left and right of the pipe body so that the broken part is supported by the other wire.

At that time, it is necessary to prevent only the sagging on the yoke side of the breaking portion, but on the other side, it is necessary to consider sagging prevention and flow prevention of the two wires A and T. Therefore, the yoke side connects both wire turnbuckles with a spring. On the other side, both wires A and T will be connected with a maintenance fitting using steel twist wires.

[Example] FIG. 1 will be described. This figure shows the part of the compound catenary related to the present invention. The triangular yoke Y1 is connected to the apex of the retaining line 1 so that the other yoke Y (second
It is held at Y2) in the figure. Pair of wire turn buckles
Both B1 and B2 are screw rods 2 and 3 of different left and right sides screwed to the central tube from both sides. In the wire turnbuckle B1, the screw rod 3 locks the auxiliary suspension wire A, and the screw rod 2 is pivotally attached to one end of the yoke Y1. In the other wire turnbuckle B2, the screw rod 3 locks the trolley wire T, and the screw rod 2 is pivotally attached to the other end of the yoke Y1. Up and down 1
A pair of wire turnbuckles B1 and B2 are connected by a coil spring 4 via a band wound around the tubular body. Also 2 lines A, T
Is connected to the threaded rod 3 by a maintenance fitting 5 near the engaging portion. The maintenance fitting 5 has a symmetrically bent lead wire portion made of steel twist wire, and after the wire turnbuckle is broken,
Sufficient strength is provided to stop the flow of the auxiliary suspension wire A or the trolley wire T. Upper and lower wire turnbuckle B
The spring that connects 1 and B2 is not limited to a coil spring, and may be any one that can follow the flow of each wire and can hold a wire turnbuckle that has been shrunk and broken.

In the present invention configured as described above, no matter which one of the two threaded rods is broken, the broken line is held by the coil spring 4 and the maintenance metal fitting 5 to the other line, and the wire passes through the pantograph. It does not hang down. In addition, the effect of the maintenance fitting can reduce the flow of the lines A and T, and the broken fitting can be pulled up by the maintenance fitting.

[Effect] The present invention can prevent the damage from spreading to the existing wire turnbuckle by simply attaching two simple members.

[Brief description of drawings]

FIG. 1 is a front view of the present invention, FIGS. 2 and 3 relate to a conventional technique, FIG. 2 is a front view of a compound catenary, and FIG. 3 is an explanatory view of an air joint. M: suspended overhead wire, A: auxiliary suspended overhead wire, T: trolley wire, Y
1, Y2 …… Yoke, B1, B2 …… Wire turnbuckle.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toru Tachibana 6-5-19 Minami-Shinagawa, Shinagawa-ku, Tokyo Sanwa Techk Co., Ltd. (56) References Japanese Patent Publication No. 44-30492 (JP, B2)

Claims (1)

[Scope of utility model registration request] Claims: 1. A structure in which an auxiliary suspension wire is attached to one end of a triangular yoke and a trolley wire is attached to the other end of the triangular yoke via wire turnbuckles, and both wires are retained by apexes of the yoke to pull the wire in the other direction. In the wire turnbuckle safety device, the wire turnbuckles are connected by a spring, and both wires attached to the wire turnbuckle are connected by a maintenance fitting.