JPS6116482Y2 - - Google Patents

Description

[Detailed description of the invention] The overhead contact line is supported by support fittings such as steady-hold fittings and curve pull fittings. These support fittings are connected to a line connecting the upper surface of the rail at right angles to the longitudinal direction of the rail (hereinafter referred to as the rail line) to prevent the pantograph from coming into contact with the support fitting and causing an accident due to the pantograph tilting or pushing up. It is installed so that it maintains a constant angle. The angle formed by the rail line and the line connecting the cross-sectional center of the overhead wire and the center of the thimble supporting the end of the curved pull fitting on the opposite side to the overhead line is called the pull angle. Also, the angle formed between the straight part of the curved pull fitting near the overhead wire and the rail line is called the installation angle.

This angle varies depending on the type of curved trigger.
The drawing angle of the general-purpose straight type is 15° and the mounting angle is 13°; the drawing angle of the general-use bow type twin simple is 11° and the mounting angle is 17°30'; the drawing angle of the general-use bow type is 11°, and the mounting angle is It is determined to be 23 degrees, and it is installed based on this angle. In Fig. 3, a is the overhead wire, b is the curved pull fitting (general arcuate type), c is the thimble, and the installation angle is indicated by x and the pull angle y.

When carrying out construction and maintenance work on overhead contact lines, measure whether the overhead wire support fittings are installed at these pulling angles, and adjust the pulling angles so that they are within the allowable range.

This pulling angle can be measured from the ground, or after work, from the top of the work tower or ladder.
A double test is being carried out by taking measurements twice.
However, in the past, the angle at which the overhead line fittings were placed with respect to the horizontal was calculated, and then the cant, the difference between the installation angle and the pulling angle, etc. were calculated to determine the actual pulling angle of the fittings, and this was within the allowable range for the standard pulling angle. Not only was the work time-consuming because we were trying to figure out whether there was one, but we also had to repeat measurements due to miscalculations, which made the work inefficient.

The object of the present invention is to solve these problems and provide a pull angle measuring instrument that can directly read the pull angle without error.

In order to achieve this purpose, the present invention is designed to be hung on overhead line fittings such as curved line fittings, and to make it possible to pre-shift the scale of the angle scale by the amount of cant with respect to a line perpendicular to the overhead line fittings. Depending on the type, the scale plate is provided with a plurality of angle scales that are shifted by an angle corresponding to the difference between the mounting angle and the pull angle, and this is indicated by a pointer so that the pull angle can be directly read.

To explain the proposed measuring device with reference to one embodiment shown in the figure, 1 is a board made of a white acrylic plate, shaped like a battledore, and can be used by holding a long and narrow part that corresponds to the handle of the battledore. . A linear groove member 5 is adhesively fixed to one end of the substrate 1, which is the tip of the battledore, along the back surface, with the inside facing toward the other end, which is the elongated portion. The channel member 5 is also made of white acrylic, and its inner side is sized to fit into the straight part of the curved trigger fitting. Reference numeral 2 denotes a scale plate made of a white acrylic plate, which is provided so as to overlap the groove member 5 at the center of one end of the substrate 1 so as to be rotatable about a common shaft 4 fixed to the substrate 1. Scale plate 2
is formed into a fan shape with the common axis 4 as a cornerstone, and a part of the fan shape is protruded in a rectangular shape from the center of the circular arc portion. In the rectangular part, there is a common axis 4 that is symmetrical from the radial line from the common axis 4 passing through the center of this part.
A cant scale 9 is placed along a circle centered on .
Below that, a triangle indicating the direction of cant inclination is displayed. Below the cant scale 9, a groove member 10 extending along the entire length of the cant scale is provided on the scale plate 2, so that the cant can be aligned with a board reference line 13 provided on the board 1 through the slot hole 10. There is. A knurled screw 1 is screwed into a nut 11 fixed to the board 1 from above in contact with the outer periphery of the scale plate 2.
2, the position of the scale plate 2 on the substrate 1 can be moved and fixed. A plurality of angle scales 6 are provided on the scale plate 2 along the arcuate edge of the scale plate 2 which is closer to the common axis 4 than the cant scale 9. Each angle scale 6 is provided along a different radius around the common axis 4, and the board reference line 13 is located at the cant scale 9.
When the scale plate 2 is fixed to the board 1 with the knurled screw 12 so that it is located at the 0 position, the common axis 4
The angles are graduated from positions that are shifted left and right by the difference between the mounting angle and the pull angle of each curved trigger fitting from a line passing through the groove and perpendicular to the channel member 5. On the scale plate 2, a pointer 3 made of a transparent acrylic plate is rotatably attached at one end to a common shaft 4, and the other end extends beyond the angle scale 6, and a weight piece 8 is attached to that end. be. An indication line 7 is provided on the pointer 3 at a portion where the line passing from the common axis 4 to the center of gravity of the pointer 3 overlaps with the angle scale 6, so as to indicate the angle. Instead of the indicating line 7, the end of the pointer 3 may be sharpened into a triangular shape to indicate the angle.

Furthermore, Kant is expressed by the following equation.

θ=sin ^-1 C/G C: Cant (unit: mm), G: Gauge (narrow gauge 1067
mm), θ: Angle of inclination of the rail. Therefore, one cant scale graduation is as follows, assuming that the distance from the center of the common axis 4 to the cant scale is l.
The size is l/Gmm.

Since this measuring device has the above-described structure, at the measurement location, the cant scale 9 corresponding to the cant at that location is aligned with the board reference line 13 using the knurled screw 12 on the higher slope side of the rail, facing the direction of rail extension. The board 1 and scale plate 2 are fixed relatively to each other, and a groove member 5 is placed on the straight part of the curved trigger fitting near the overhead line at that location as shown in FIG.
At the point where the pointer 3 becomes vertical due to gravity, the angle scale (of the general bow shape if the metal fitting is a general bow shape, for example) where the indicator line 7 of the pointer 3 is located becomes the measurement trigger. It becomes an angle.

In addition, in the case of a general straight type, the difference between the mounting angle and the pulling angle is only 2° as is clear from the angles described above, so the angle scale is placed on the left and right from the point corresponding to the 0 position on the cant scale. Adjust the angle scale to the indicator line 7.
Read the instructions and subtract 2 degrees from this to obtain the measured value. In this way, it is immediately possible to know whether the actual pulling angle measured is within the allowable range of the standard pulling angle.

For other overhead wire support fittings such as steady rest fittings, pass a straight round bar etc. between the center of the indicator thimble of the overhead wire and the fitting, hang the proposed measuring device on this, and set the angle scale indicated by the indicator line 7. The angle scale can be read on the left and right from the point corresponding to the 0 position on the cant scale, and the pull angle can be directly determined from this.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the overhead wire support fitting pull angle measuring instrument according to the present invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is a front view of an example of the curved pull fitting, and its relationship with the overhead wire. FIG. 4 is a front view showing how the proposed measuring device is used. 1... Board, 2... Scale plate, 3... Pointer, 4...
... Common shaft, 5 ... Channel member, 6 ... Angle scale, 7 ...
...Indication line, 8... Weight piece, 9... Cant scale, 10
...Groove hole, 11...Nut, 12...Knurled screw, 13...Board reference line.

Claims (1)

[Scope of utility model registration request] A substrate, a groove member fixed to one end of the substrate with the inside facing the other end, and a scale plate provided near the groove member so as to be rotatable relative to the substrate by a common axis and stacked on the substrate. , a cant scale graduated on the scale plate along a circle centered on the common axis symmetrically from one ray from the common axis, a groove-shaped hole provided in the scale plate along the cant scale, and a scale plate. A nut fixed to the board near the outer periphery of the board or a screw hole provided in the board, a knurled screw screwed into the nut that fixes the scale plate to the board, and a scale plate placed on the board at the cant scale 0 position on the common axis side from the cant scale. The scale plates are moved left and right from a line perpendicular to the channel that passes through the common axis when fixed by an angle equal to the difference between the installation angle and the pull angle of each curved trigger, and then the scale plates are moved along circles with different radii centered on the common axis. It is characterized by comprising a plurality of angle scales graduated on the top, and a pointer rotatably mounted on the scale plate by a common shaft and having a pointing line or a pointing tip on a line passing through the center of gravity from the common shaft. An instrument for measuring the pull angle of overhead wire support fittings.