JPS595455B2 - Spring type suspension device for lambda type overhead wires - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A system in which the central part of the wire is locked to a structure and the overhead contact line is held between anchors provided at both ends of the wire is known as a lambda type catenary system.

This method is extremely economical because the length of the suspension line is only the length of the above wire, but on the other hand, the length of the catenary (vertical curve) formed by the wire is short, so it is flexible for vertical movement. This has the disadvantage that this area is the so-called hard point of the overhead contact line.

The present invention is intended to solve the above-mentioned drawbacks without sacrificing the advantages of the lambda type catenary.

Examples will be described with reference to the drawings.

The triangular hanging fixture 1 is latched to the structure at its upper end, and has pins 1a at both lower ends.

The spring cylinder 2 has a handle 2a on its upper end lid, and a center hole in its lower end lid 2b.

The rod 3 freely passes through this center hole, has a spring retainer 4 locked at its inner end, and has a T-shaped shaft portion 3a projecting from its outer end as shown in FIG.

A spring S is inserted between the lid 2b and the spring holder 4.

The anchor ear 5 consists of a symmetrical pair of ear pieces 5a and 5b,
It is pivotally attached to the shaft portion 3a through the hole at the end, and the overhead contact wire T can be held by the other bolt holes.

That is, the overhead contact line is suspended by left and right rods branching from the hanging fitting.

FIG. 3 shows another embodiment in which a triangular yoke 6 is secured to the tip of the rod, and two anchors 9 and 10 are provided via wires 7 and 8 using pins 6a at both lower ends of the yoke.

Note that the shape of the spring tube 2 may be a housing shape or a frame shape.

The present invention is installed as shown in Fig. 1, and the dead weight and tension of the overhead contact line T are shared between the left and right rods and the overhead contact line between the two rods, and the spring maintains balance in a compressed state.

Therefore, as the pantograph approaches, the overhead contact line is pushed up without any force, and the occurrence of hard spots mentioned at the beginning is alleviated.

If a spring with a constant spring constant is used, it is possible to determine the rod length corresponding to a predetermined installation interval of the left and right anchorers by calculation or experiment in advance, and in this case, the installation work can be significantly simplified.

The same applies to the case shown in FIG. 3, in which case one rod may be used instead of the wire 7.8.

At hard points on the overhead contact line, the contact pressure between the overhead contact line and the pantograph increases, and the pantograph that is examined by entering while pushing up the overhead contact line is pushed down, causing separation from the contact line due to inertia, causing local wear. .

The above-mentioned drawbacks were unavoidable in the conventional lambda-type catenary in which anchors were attached to both ends of the wire, but the present invention solves this problem by replacing the wire with a rod, thereby making it possible to use a spring. The feature is that it has been resolved.

[Brief explanation of drawings]

FIG. 1 is a front view of the present invention, FIG. 2 is an exploded perspective view of the vicinity of the anchorage retaining portion, and FIG. 3 is a perspective view of another embodiment. 1...-Hanging fitting, 1a... Pin, 2... Spring tube, 2
a...Handle, 2b...Lid, 3...Rod, 3a
... shaft part, 4 ... spring holder, 5 ... anchor,
5a, 5b...Ear piece, 6...Triangular yoke, 6a.
...Pin, 7,8...Wire, 9.10...Anchor, T...Telephone line, S...Spring.

Claims (1)

[Claims] 1. A triangular hanging fitting that is latched to a structure at its upper end and equipped with pins at both lower ends; a spring tube that has a handle on its upper end that can be latched to the pins of the hanging fitting; and a spring tube with a hole in its lower end lid; For lambda-type overhead wires, consisting of a rod that penetrates through and has a spring holder locked at the upper end and can lock the anchor at the lower end either directly or via a yoke and a wire, and a spring inserted between the spring lower cover and the spring holder. Spring-loaded suspension device.