JP7481213B2 - Equipment for measuring overhead line height and deviation - Google Patents

Description

The present invention relates to an overhead line height and horizontal deviation measuring device for measuring the height and horizontal deviation of overhead lines installed above railway tracks.

Conventionally, there is known a measuring tool for measuring the height and horizontal deviation of overhead wires installed along railway tracks (see, for example, Patent Document 1). This measuring tool has a horizontal deviation measuring part (horizontal scale) for measuring the horizontal deviation of the overhead wire, a height measuring part (measuring rod) for supporting the horizontal deviation measuring part at the height of the overhead wire and measuring the height of the overhead wire, and a leg (support) that is placed on a pair of rails so as to span between them and support the height measuring part. The height measuring part and the deviation measuring part are each graduated, and the height of the overhead wire can be measured using the graduations on the height measuring part, and the horizontal deviation of the overhead wire can be measured using the graduations on the deviation measuring rod.

Utility Model Registration No. 320086

The height and horizontal deviation of the overhead wire must be measured while the wire is being pushed up by a certain pushing-up load of the train pantograph. When using the above-mentioned conventional measuring tools, the only way to push up the overhead wire is to manually push up the deviation measuring part, which not only imposes a heavy workload but also poses the problem of difficulty in obtaining an appropriate pushing-up load.
Therefore, an object of the present invention is to provide a measuring device that can measure the height and horizontal deviation of an overhead line while reproducing the lifting of the overhead line by a pantograph without imposing any extra workload.

The overhead line height/displacement measuring device of the present invention, which solves the above problems, comprises a horizontal displacement measuring unit 2 for measuring the horizontal displacement of the overhead line T, a height measuring unit 3 for supporting the horizontal displacement measuring unit 2 at the height of the overhead line T and measuring the height of the overhead line T, and a support base 4 placed on a pair of rails R to support the height measuring unit 3. The height measuring unit 3 comprises a support tube 31 that is vertically erected on the support base 4 at the center corresponding position between the pair of rails R, R, and a telescopic column 32 that is inserted into the support tube 31 so as to be able to rise and fall at its lower part and has a vertical scale S1 for measuring the height of the overhead line T. The telescopic column 32 is provided so as to be able to rise and fall relative to the support tube 31 by pulling a wire 52 wound around a winch 51 provided on the support base 4. A tension measuring device 56 for measuring the pushing load of the height measuring unit 3 on the overhead line T is provided during the extension of the wire 52.

According to the present invention, the displacement measuring section is pushed up by operating a winch on the ground, which makes it possible to push up the overhead line without putting a great deal of strain on the worker. Furthermore, the tension measuring device can accurately grasp the overhead line's lifting load and adjust the winch, so that the lifting state of the pantograph relative to the overhead line can be accurately reproduced and the height and deviation of the overhead line can be measured.

1 is a front view of an overhead line height/deviation measuring device according to an embodiment of the present invention. FIG. 2 is a front view showing a most contracted state of the horizontal deviation measuring section of the height/deviation measuring device of FIG. 1; FIG. 2 is a front view showing a state in which the horizontal deviation measuring part of the height/deviation measuring device of FIG. 1 is in the middle of being extended. FIG. FIG. 2 is a top view of the bottom surface of the deviation measuring unit. FIG. FIG. 4 is a front view of the lower end of the telescopic column.

Hereinafter, an overhead line height/deviation measuring device according to one embodiment of the present invention will be described with reference to the drawings.
1 to 2B, overhead line height/horizontal deviation measuring device 1 is for measuring the height and horizontal deviation of overhead line T such as a railway trolley wire, and includes a horizontal deviation measuring unit 2 for measuring the horizontal deviation of overhead line T, a height measuring unit 3 for measuring the height of overhead line T, and a support base 4 placed on a pair of rails R and supporting height measuring unit 3. Height measuring unit 3 supports horizontal deviation measuring unit 2 at a height position of overhead line T.
The height measuring unit 3 comprises a support cylinder 31 vertically installed on the support base 4 at a central position between the pair of rails R, and a telescopic column 32 inserted at a lower part into the support cylinder 31 so as to be able to rise and fall. The telescopic column 32 has a lower part with a vertical height measuring scale S1 for measuring the height of the overhead line T. The telescopic column 32 is provided so as to be able to rise and fall relative to the support cylinder 31 by a push-up mechanism 5.

The support table 4 comprises a base plate 41 that is placed on the rails R across the pair of rails R, wheels 42 provided at both ends of the base plate 41, and a position control member 43. The wheels 42 are provided to roll on the rails R with the base plate 41 inclined together with the measuring units 2 and 3 in the extension direction of the rails R, and are used to move the device. The position control member 43 abuts against the inner surface of the rails R to control the horizontal position of the device.

In the illustrated embodiment, the telescopic column 32 is comprised of multiple joint rod members 32a-32d that are nested together and fixed to each other by connecting pins in the extended position, and the whole is contracted and assembled into the support tube 31. The side of the lowest joint rod member 32a has a scale S1 for measuring height in the vertical direction. The scale S1 is marked in two ways so that the height can be measured corresponding to two different extension states: a state in which the upper two joint rod members 32c, 32d are extended and abutting the overhead line T, and a state in which the three joint rod members 32b, 32c, 32d are extended and abutting the overhead line T, and the height can be read at the top end of the support tube 31.

The deviation measuring unit 2 comprises a contact plate 21 that is connected in a detachable manner to the tip of the height measuring unit 3 at the center, and an obstacle detection sensor 22 fixed to both ends of the contact plate 21. The contact plate 21 is supported by ribs 23 so as to keep it horizontal, and as shown in Figure 3, a deviation measurement scale S2 is displayed so that the contact position with the overhead wire T can be visually observed from below and the deviation distance can be measured. The contact plate 21 is configured in a shape that imitates a train pantograph, and is provided so that any obstruction to the pantograph can be checked during measurement. The obstacle detection sensor 22 is composed of a limit switch, and detects obstacles such as crossing wires on the left and right of the deviation measuring unit 2 and sounds a buzzer 24.

The lifting mechanism 5 of the telescopic column 32 will be described with reference to FIG. 4. The lifting mechanism 5 lifts and lowers the telescopic column 32 relative to the support tube 31 by rotating the handle 51a of the winch 51 on the support base 4 to wind up and unwind the wire 52. One end of the wire 52 is hooked to the upper end of the support tube 31, and as shown in FIG. 5, it is pulled down into the support tube 31, folded back upward through a movable pulley 53 fixed to the lower end of the telescopic column 32, folded back downward through a fixed pulley 54 provided at the upper end of the support tube 31, and wound around the drum of the winch 51 through a traction pulley 55. A tension measuring device 56 consisting of a digital hanging scale is fixed to the support base 4, and the wire 52 is hung in the middle of being extended on a measuring pulley 57 connected to the puller of the device. This tension measuring device 56 can measure the lifting load of the telescopic column 32 against the overhead line T.

The measuring device 1 moves below the measurement point of the overhead line T while rolling the wheels 42 on the rail R. After extending the telescopic column 32 to a predetermined length, the winch 51 is manually or alternatively wound up by a motor using the handle 51a to push up the height measuring unit 3 and bring the contact plate 21 into contact with the overhead line T. The winch 51 is then wound up, and the contact plate 21 pushes up the overhead line T. When it is confirmed by the digital hanging scale 56 that the lifting load of the overhead line T by the contact plate 21 has reached a predetermined value (the standard lifting load of the overhead line T by the pantograph), the scales S1 and S2 are used to measure the horizontal deviation and height of the overhead line T. Therefore, the measuring device 1 can reproduce the lifting state of the pantograph when a train passes and measure the height and deviation of the overhead line without placing a burden on the work vehicle.

Reference Signs List 1: overhead line height/horizontal deviation measuring tool 2: horizontal deviation measuring section 21: contact plate 22: obstacle detection sensor 23: rib 24: buzzer S2: deviation measuring scale 3: height measuring section 31: support tube 32: telescopic columns 32a to 32d: joint rod material S1: height measuring scale 4: support base 41: base plate 42: wheels 43: position regulating member 5: push-up mechanism 51: winch 52: wire 53: movable pulley 54: fixed pulley 55: traction pulley 56: tension measuring device 57: measuring pulley T: overhead line R: rail

Claims (3)

a horizontal deviation measuring unit for measuring a horizontal deviation of the overhead line;
a height measuring unit for supporting the horizontal deviation measuring unit at a height of the overhead line and measuring the height of the overhead line;
A support base that is placed on a pair of rails and supports the height measuring unit,
The height measuring unit includes a support cylinder that is vertically installed on the support base at a central position between the pair of rails, and a telescopic column that is inserted into the support cylinder at a lower portion so as to be able to rise and fall and has a scale in the vertical direction for measuring the height of the overhead line,
The telescopic column is provided so as to be capable of moving up and down relative to the support cylinder by pulling a wire wound around a winch provided on the support base,
A height/displacement measuring device for overhead wires, characterized in that a tension measuring device for measuring the upward load of the height measuring unit on the overhead wire is interposed in the middle of extending the wire. The overhead line height/displacement measuring device according to claim 1, characterized in that the tension measuring device is made of a scale fixed to the support base, and the wire is hung in the middle of being extended on a traction pulley connected to the puller of the scale. The overhead line height/displacement measuring device according to claim 2, characterized in that the wire is engaged at one end side with the upper end of the support cylinder, pulled down into the support cylinder, folded back upward through a movable pulley at the lower end of the telescopic column, folded back downward through a fixed pulley provided at the upper end of the support cylinder, and wound around the drum of the winch through the traction pulley.

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