JPS59183308A - Wear measuring apparatus for contact wire - Google Patents

Abstract

PURPOSE:To enable a continuous and easy measurement of wear condition of a contact wire from the ground by arranging a contact wire grasping device, a light emitter, a support rod with a number of optical fibers and a scale plate. CONSTITUTION:A support rod 3 is moved along a contact wire 1 being supported with a hand. A number of optical fibers 13 are mounted along the support rod 3 and arranged in rows vertically at the upper end thereof to receive light from a light emitter 11 while exposed onto a scale plate 15 with an expanded interval at the lower end face thereof 13. Optical fibers each 0.5mm. in the diameter are arranged in two rows to determine wear of the contact wire 1 with a light of the light emitter 11 and can be measured in terms of the fiber center distance =0.25mm.. This makes light incident into the end train of the fiber with a clear boundary of brightness by a diffusion prevention plate 9 and thus, enables the measurement of the thickness of the contact wire by an easy and inexpensive method using a scale plate with an expanded interval.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for measuring the state of wear of a power supply contact wire of an electric train.

The contact wire is worn out by the sliding movement of the pantograph, and if the wear becomes significant, it will break. For this reason Toro +
) For IJ, the wear limit is determined according to the nominal cross-sectional area in consideration of the safety factor. When the wear limit is reached, the contact wire must be replaced with a new one to prevent it from breaking. By the way, it is currently determined whether or not the wear limit has been reached by a person climbing up the overhead wire using a ladder or the like and measuring the remaining diameter of the contact wire with a micrometer or the like. However, in sections where the vehicle speed is high and the driving interval is short, it is difficult to measure as described above. Furthermore, since the lifespan of a contact wire is often affected by local wear rather than overall wear, it is necessary to measure it as completely as possible.

The present invention aims to provide a contact wire wear measuring device that can easily and continuously measure the wear state of contact wires from the ground, regardless of whether they are live wires or dead wires.

In order to achieve this object, the present invention consists in constructing a contact wire wear measuring instrument having the structure described in the claims.

The contact wire wear measuring device according to the present invention will be explained with reference to the embodiment shown in the drawings.

In the figure, / is /l-roly wire, and λ is a hanging fitting for the trolley wire. 3 is a support rod of the measuring instrument of the present invention. A contact wire clamping device is provided at one end of the support rod 3. The contact wire clamping device is attached to the support rod 3 and extends beyond the support rod 3 to a substrate S1, and a roller B is a clamping member fixed to the substrate S so as to ride on the upper surface of the contact wire. , a clamping member 7 is movably attached to the board k from the roller B toward the support bar 3 side in parallel with the support bar 3, and a clamping member 7 is attached to the board S and the clamping member 7 so as to constantly pull the clamping member 7 toward the contact wire /. It consists of a spring g stretched between.

A diffusion ljJ stop plate 9 is attached to the end of the clamping member 7 near the contact wire / so as to be in contact with the bottom surface of the contact wire / in the longitudinal direction. A part of the diffusion prevention plate 9 is provided with a lateral extension 10.

The contact wire clamping device q is provided with a contact wire clamping device holder on the side of the diffusion prevention plate wa that is in contact with the contact wire so that light can be irradiated onto the side of the contact wire ／ which is clamped by the roller B and the diffusion prevention plate wa. A part of the light emitting device is equipped with a light emitting device consisting of a high brightness light emitting diode. This light emitting device // can emit light by inserting a battery into a battery case /2 provided in a part of the contact wire clamping device.

The support rod 3 has a large number of optical fibers/3 along the support rod 3.
is attached, one end face of which faces the light emitting device // with the diffusion prevention plate 9 inside, and is attached to a part of the contact wire clamping device along the clamping direction of the contact wire as shown in FIG. They are arranged closely in rows.

Near the other end of the support rod 3, there is a scale plate / left equipped with a scale / B, and an optical fiber /,? The other end surface is exposed at each scale/O of the scale plate/S in the order in which the one end surfaces of the optical fibers 73 are arranged.

This measuring device is equipped with a battery case/,! Put a battery in and make the light emitting device // emit light, then support the support rod 3 by hand and bring the clamping device (41) close to the contact wire /. 10, push down the hem release prevention plate 7, slide the contact wire / sideways, position the contact wire / on the diffusion prevention plate 9, and then lower it downward to move the roller O to the "-" side of the contact wire /. The diffusion prevention plate wa is kept in contact with the lower surface of the contact wire / by the spring g, and at this time the optical fiber /3 on the display board /k
Scale at the boundary between the emitting and non-emitting rows on the end face/
Look at the contact wire and read the thickness of the contact wire to determine the amount of wear. Then, wear tri can be continuously determined from changes in the thickness of the contact wire by moving it along the contact wire.

If plastic fibers with a diameter of Q and 3 mm are arranged in a line as optical receivers as optical fibers, measurements can be made in units of 0.3 meters, but as shown in Fig. , the center distance S of the fibers in the row direction that are in momentary contact becomes o, 2sram, so measurements can be made in units of 0.2'SrLm. In addition, since the distance between the optical fibers on the other end of the optical fiber can be freely widened, the scale can be easily seen even at night. It is preferable to use a red light emitting diode to close the device.

If the light emitted from the light emitting device // toward the contact wire / is not parallel, it will be diffused into the row of end faces of the optical fiber / 3 and the boundary between the bright and dark areas will become unclear. Therefore, in the present invention, a diffusion prevention plate is brought into contact with the contact wire/3 so that the boundary between the bright and dark areas of the light hitting the row of end faces of the optical fibers/3 becomes clear. Scale plate/left scale/
In case B, it is sufficient to display the thickness of the diffusion prevention plate q included in the thickness of the contact wire.

If a device capable of emitting parallel rays toward the row of end faces of the optical fibers /3 is used as the light emitting device //, the anti-diffusion plate 9 will be unnecessary, but a lens system will be required to obtain the parallel rays. In addition, a powerful light source is required, making the light emitting device itself heavy, making it unsuitable and expensive as a device to be attached to the tip of the support rod 3 that is handled manually. In contrast, in the present invention, by providing the diffusion prevention plate 7, a light emitting diode,
Light bulbs can be used as they are, and the structure can be lightweight and inexpensive.

The roller B is used to facilitate the movement of the measuring instrument along the contact wire, but it may also be a non-rotating member that can slide on the top surface of the contact wire. Alternatively, a clamping device may be constructed in which the clamping member in contact with the lower surface of the contact wire is fixed to the support rod 3, and the clamping member in contact with the upper surface of the contact wire is movable. Further, the movable clamping member of the two clamping device may be operated by a cable from the other end of the support rod to push it toward or release it from the contact wire.

The measuring instrument of the present invention uses a large number of optical fibers, the end surfaces of which are closely arranged in a straight line, and the measurement detection section is a part that is movable to the object to be measured in order to apply the non-parallel light rays irradiated to the object to be measured to the end surface of the optical fiber. An anti-diffusion plate is provided in contact with the object to be measured, and the brightness of the boundary between the part that is blocked/lighted by the object to be measured and the part that is not blocked is made clear, and the light is incident on the end face row of the optical fiber, and the other end face of the optical fiber is placed at a distance from the scale plate. A cheap and lightweight measuring device is available that can easily measure the thickness of the contact wire at a remote location.

[Brief explanation of drawings]

Fig. 1 is a side view of one embodiment of the contact wire wear measuring device of the present invention in a state of use, Fig. 2 is a partial front view of Fig. 7, Fig. 3 is a side view of Fig. Ω, and Fig. 9. 1 is an enlarged view of the scale plate in FIG. 1, and the second figure is a diagram showing the arrangement of the light receiving portions on one end surface of the optical fiber. /...Trolley wire, λ/Hanging fitting, 3-Support rod, G-Trolley wire clamping device, S-Substrate, B-Roller, 7-Movable clamping member, g-Spring, 9-Diffusion prevention plate, 10・Extension part, // Light emitting device, /Co・Battery case, /3・・Optical fiber. Applicant: Toho Electric Industry Co., Ltd. Agent: Katsunari Nakamura, ″,）) −ノ

Claims (1)

[Claims] (1) A trolley wire clamping device having a support rod and a pair of clamping members consisting of a fixed clamping member and a movable clamping member provided at one end of the support rod; A diffusion prevention plate formed to be in contact with the contact wire, and a light emitting device provided in the contact wire clamping device on the side of the diffusion prevention plate in contact with the contact wire so as to irradiate light onto the side of the contact wire clamped by the contact wire clamping device. a device, a number of optical fibers attached to the support bar along the support bar, and a scale plate attached to the support bar near the other end of the support bar, one end surface of the number of optical fibers is connected to the diffusion prevention plate. The plurality of optical fibers are arranged in a row in close contact with each other in the contact wire clamping direction on a part of the contact wire clamping device facing the light emitting device, and the other end surfaces of the plurality of optical fibers are arranged in a row at each scale portion of the scale plate. A contact wire wear measuring device characterized by a contact wire that is exposed in the order of arrangement.