JPH044164Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] In order to uniformly wear the pantograph slider, the trolley wire is deviated in a zigzag manner to the left and right.
The present invention is intended to easily measure the amount of this deviation.

[Conventional technology]

Utility Model Publication No. 31-11763 is publicly known. A telescopic rod whose length can be adjusted stands upright from the center of the leg fittings that are about to be passed over both rails, and a horizontal scale is provided at the tip of the rod in parallel with the leg fittings. The structure is such that a telescoping rod is stretched out and the deflection is read using a horizontal scale that is brought into contact with the trolley wire.However, the telescoping rod, which weighs approximately 25 kg, requires manual effort to be vertically supported, and transportation is difficult. It was not easy to read the horizontal scale on the height. Furthermore, in live wire work, the measuring device comes into contact with the trolley wire, so even if the members are made of insulating material, there is a risk of electrical leakage.

[Problem that the invention attempts to solve]

An optical structure was adopted to eliminate the use of long telescopic rods and enable measurements to be taken easily on the ground.

〔Example〕

The drawings will be explained. The rectangular base 1 can be placed across both rails R, and for this purpose, a positioning convex surface 1a that can be engaged with the inner surface of the rail is provided. It is also provided with a channel-shaped dovetail groove 1b perpendicular to the rail R. The rectangular sliding plate 2 has a convex side that engages with the dovetail groove 1b, and can freely slide along the dovetail groove.
Its upper surface is at the same height as the base 1. The measuring board 3 has a box shape with a narrow cross section, and its lower end is inserted into a groove 2a provided in the rail direction at the center of the sliding board, and is fixed upright. The measuring board 3 also has a slit 3a leading from the top to the bottom, and a clear window 3b near the bottom.
is provided. The mirror 4 is installed horizontally at the bottom of the slit, and is capable of projecting the trolley wire above the slit in a direction perpendicular to a plane formed on the two rails. A base 3c is engraved on the side surface of the measuring board, and a scale is engraved on the base 1 corresponding to this.

The present invention is constructed as described above. The operator slides the sliding plate while looking at the mirror surface from above the slit. By reading the scale on the base when the trolley wire is projected onto it, it is possible to quantitatively grasp the deviation. The inventor designed a measuring board with a height of about 1 m, a slit width of about 10 mm,
As a result of experiments on a prototype product with a slit length of approximately 200 mm, it was confirmed that the projection of the trolley wire on the mirror could be clearly seen without being obstructed by the projection of the worker's head.

FIG. 3 is an explanatory view of another embodiment, in which the mirror 4 is tilted at an α angle with respect to the bottom surface of the slit. In this case, 2α from the projection point on the mirror to the slit
If a clear window is provided so as not to obstruct the passage of the angularly inclined reflected light beam, the projection of the trolley wire can be detected by placing the eye on the line, and the deflection can also be measured. In other words, the objective can be achieved even by visual observation from the side of the measuring board.

〔effect〕

Workers can easily measure the overhead wire deflection in their normal posture without touching the measuring device directly to the trolley wire.
It can work without being affected by wind, rain, temperature, or humidity, and is small and lightweight, making it easy to transport, improving work efficiency.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the present invention, Figure 2 is a front view of the same,
FIG. 3 is a partial front view of another embodiment. 1...Base, 1a...Convex surface, 1b...Dovetail groove,
2...Sliding plate, 2a...Groove, 3...Measuring plate, 3a
...slit, 3b... clear window, 3c... base line, 4... mirror.

Claims (1)

[Claims for Utility Model Registration] 1. A rectangular board that can be placed on two rails and has a dovetail groove in a direction perpendicular to the rail, a rectangular sliding plate that can slide along the dovetail groove, and a rail that extends in the longitudinal direction. A box-shaped measuring board with a narrow cross section, which is fixed upright to the center of the sliding board in the same direction as that, has a slit that reaches from the top surface to the bottom, and has a clear window near the bottom;
An overhead wire deflection measuring device comprising a narrow mirror fixed to the bottom of a slit of a measuring panel, and capable of projecting a trolley wire onto the mirror in a direction perpendicular to a plane formed on two rails. 2 Utility Model Registration The measuring device according to claim 1, in which the mirror is inclined with respect to the bottom surface of the slit, and a clear window is provided to allow the reflected light beam projected from the slit to pass through.