JPH079895A - Weight shift breadth measurement instrument for trolley wire tension adjusting device - Google Patents

Abstract

PURPOSE:To easily measure the maximum shift breadth of a weight by using a permanent magnet for forming at least a part of the internal surface of a cylindrical body having the prescribed inner diameter, regarding a measurement instrument for measuring the shift breadth of a weight suspended from a block in a block type trolley wire tension adjusting device. CONSTITUTION:This measurement instrument A has inner diameter approximately equal to the outer diameter of the bracing rod 32 of a trolley wire tension adjusting device. Also, the instrument A has a cylindrical body 6 with an open section 61 at one side, and a few plate type projections 7a to 7c are radially formed on the external surface thereof at equal angular intervals. Furthermore, a permanent magnet 9 is buried in the cylindrical body 6. The instrument A, when used, is made to adhere to the upper surface of the I-piece 31a, for example, of an uppermost weight 3 and mounted thereon. When a trolley wire is extended and the weight 3 comes down after the loosening of the trolley wire and the rise of the weight 3, the instrument A shifted due to the rise of the weight 3 is left at an elevated position as a result of attraction to the rod 32. According to this construction, a maximum shift position becomes visible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring device for measuring the moving width of a weight hanging from a pulley in a pulley type electric line tension adjusting device.

[0002]

2. Description of the Related Art In a train line, a pulley-type train line tension adjusting device is installed with an adjusting distance of about 800 m in order to constantly apply a constant tension to a trolley wire and an overhead line so as to improve current collection by a pantograph. ing. This train line tension adjusting device has a line (not shown) as shown in FIG.
It is composed of a step pulley 2 attached to a telephone pole 1 which is planted along with and a weight 3 hanging down from the step pulley 2. The step pulley 2 includes a small diameter pulley 21, a trolley wire 41 at an end portion of which is a connecting rod 51,
Connecting wire turnbuckle 52 and suspension insulator 53
The weight 3 necessary for the large-diameter pulley 22 is hung down. The weight 3 is made of a plate-shaped concrete or cast iron block, and a plurality of the weights are vertically stacked so as to have a required weight. The weight 3 is attached to the upper end of the support rod 54 penetrating the center holes thereof. It is hung on the large-diameter pulley 22 via the wire 55. Further, a pair of eye fittings 31a, 31a and 31b, 31b are attached to the weights 3 located at the upper end and the lower end, respectively, on their side surfaces facing each other, and these eye fittings 31a, 31b are attached to the weight 3 respectively.
Anti-vibration rod 3 that extends vertically and is sandwiched between
2, 32 are inserted and supported.

When the tension of the trolley wire 41 decreases due to an increase in temperature and the like, the weight 3 descends by its own weight and the step pulley 2 is rotated counterclockwise in FIG.
When the tension of the trolley wire 41 increases due to a decrease in temperature, the step pulley 2 rotates clockwise in FIG. 5 and the weight 5 is pulled up to loosen the tension of the trolley wire 41. The trolley wire 41 is automatically adjusted so that a constant tension is applied.

As described above, if the weight 3 of the trolley wire tension adjusting device is not suspended at a movable height position as the trolley wire 41 expands and contracts due to changes in temperature, it is necessary to cope with the expansion and contraction of the trolley wire 41. I can't. Further, the maximum movement width of the weight 3, that is, the width of expansion and contraction of the stretched trolley wire 41 is an important index for grasping the entire trolley wire and performing maintenance.

However, the conventional train line tension adjusting device is not provided with means for measuring the maximum movement width of the weight 3. Therefore, the worker occasionally checks the hanging position of the weight 3 to adjust the hanging height of the weight 3. Therefore,
There is a problem that it requires a great amount of time and labor and that it is difficult to accurately measure the maximum movement width.

[0006]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is that it is extremely difficult to measure the maximum moving width of the weight in the conventional trolley wire tension adjusting device.

[0007]

According to the present invention, at least a part of the inner peripheral surface of a tubular body having a predetermined inner diameter is formed by a permanent magnet, and further, in the above configuration, the tubular body has elasticity. To achieve an object of having a configuration in which an opening is formed on a peripheral wall and capable of measuring a maximum moving width of a weight in a pulley type trolley line tension adjusting device.

[0008]

[Operation] The measuring tool is attached to the swing rod by bringing the cylindrical body into close contact with the upper surface or the lower surface of the eye fitting attached to the uppermost or lowermost weight. When the weight moves as the trolley wire expands and contracts, the measuring tool attached to the swing rod is pushed by the eye fittings and slides along the swing rod, and when the weight moves to the original position again, The magnetic force of the permanent magnet that forms the circumferential surface attracts the swing rod and stops at that position to display the maximum movement position of the weight.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 3 show an embodiment of the present invention. A measuring tool A is, for example, a polycarbonate resin mixed with a fluorescent pigment. It is formed by injection molding of a hard synthetic resin having elasticity and has an inner diameter equal to or slightly smaller than the outer diameter of the swing-off rod 32 of the pulley type electric line tension adjusting device shown in FIG. Three plate-shaped projections 7a, 7b, 7c are formed on the outer peripheral surface of a partially cut-out cylindrical body 6 in which an open portion 61 having a width of about half the inner diameter is formed at an angle of 120 °. And it is protruding radially.

Further, one of the three projections 7a is arranged so as to face the open portion 61, and is opened to the inner peripheral surface 62 of the cylinder 6 at the base end portion 71a which is formed thickly. Since the vertical groove 73a is formed, the open portion 61 can be widely opened.

Further, between the projections 7a and 7b of the cylindrical body 6, a substantially rectangular transparent window 63 opened to the inner peripheral surface 62 is formed, and the inner surface 91 of the transparent window 63 is formed inside the cylindrical body 6. A plate-shaped permanent magnet 9 formed in a curved surface having a curvature equal to that of the peripheral surface 62 has the inner surface 91 fitted in the same surface as the inner peripheral surface 62. Any means may be used as long as the permanent magnet 9 is fixed to the cylinder 6 at a predetermined position by press fitting or adhesive. Also,
As the permanent magnet 9, various conventionally known ones can be used, but it is particularly preferable to use a new rare earth magnet made of a sintered alloy containing neodymium, iron or boron as a main component.

In the drawings, reference numeral 64 is a cover plate of the transparent window 63 adhered to the outer peripheral surface 65.

In this embodiment, as shown in FIGS. 3 and 4, the cylindrical body 6 is brought into close contact with the upper surface or the lower surface of the eye fittings 31a, 31b attached to the uppermost or lowermost weight 3, and the swing rod is attached. Attach to 32. In this embodiment, if the open portion 61 is put along the swing rod 32 and pushed in the horizontal direction as it is, the elasticity of the cylindrical body and the vertical groove 73 formed in the projection 7a are formed.
The open portion is opened wide by a and is attached to the swing rod 32 with one touch. At this time, the measuring tool A has an inner peripheral surface 62
The magnetic force of the permanent magnet 9 fitted so as to form the same surface as that is attracted to the anti-vibration rod 32, and drops even when it is attached to the anti-vibration rod 32 while being in close contact with the lower surface of the eye fitting 31b. Don't worry. Further, when the inner diameter of the tubular body 6 is the same as or slightly smaller than the outer diameter of the swing rod 32 as in the present embodiment, the elastic force of the tubular body 6 itself also exerts the fastening force.

When the weight 3 moves, for example, as the trolley wire contracts and the weight 3 moves upward, the measuring tool A is pushed by the eye fitting 31a projecting from the weight 3 and moved along the swing rod 32. As indicated by the chain double-dashed line in FIG. 3, it slides upward against the attractive force of the permanent magnet 9 and the elastic force of the cylindrical body 6 itself. Then, when the trolley wire extends, the weight 3 moves again to the original position direction, but the measuring tool A stops at that position due to the attractive force of the permanent magnet 9 and the elastic force of the cylindrical body 6 itself.
Therefore, since the stop position of the measuring tool A displays the maximum movement position of the weight 3, the operator can visually and extremely easily and accurately measure.

Further, even when the weight 3 moves downward as the trolley wire expands and contracts, the maximum downward moving position can be measured in the same manner. Therefore, the two measuring tools A. A is an eye fitting 31 attached to the top or bottom weight 3
The maximum movement width of the weight 3 can be measured very easily if it is closely attached to the upper and lower surfaces of a and 31b and attached to the swing rod 32.

In this embodiment, the cylinder 6 and the projections 7a, 7 are
Since b and 7c are injection-molded with a hard synthetic resin having elasticity such as polycarbonate resin, the manufacturing is extremely easy and the product price is low, and the light weight makes it convenient to carry, especially the open portion 61. In the case of the structure having the above, the swing rod 3 of the existing train line tension adjusting device is used.
It can be attached and removed to and from 2 with a single touch, and has extremely good workability.

Further, the measuring tool A stops at the swing rod 32 by the attracting force of the permanent magnet 9 and shows the maximum moving position, and it does not move or drop due to wind, rain, vibration, etc., and the stopping is sure. is there. In particular, when a new rare earth magnet is used as the permanent magnet 9, the attractive force is extremely large, the stopping is sure, and the durability is superior.
In addition, when the fastening by the elasticity of the cylinder 6 is combined, a further retention effect can be expected.

Furthermore, since the three projections 7a, 7b, 7c that are radially projecting at an angle of 120 ° with each other are pressed against the eye fitting 31a, the projections are extremely stable without being caught. Since it slides up or down along the rod 32, the tension of the trolley wire can be measured without any influence.

Furthermore, in this embodiment, since the fluorescent pigment is mixed in the polycarbonate resin, it is very easy to see even at night.

In this embodiment, the cylindrical body 6 and the protrusions 7a,
7b and 7c are formed by injection molding from a hard synthetic resin having elasticity such as a polycarbonate resin, and an open portion 61 is formed in the partially cut-off cylindrical body 6 and a thick base end portion 71a. Since the open vertical groove 73a is formed on the inner peripheral surface 62 of the cylinder 6 and has the projection 7a that can greatly open the open portion 61, it can be attached to the swing rod 32 of the existing train line tension adjusting device. It can be attached and removed with one touch, and its workability is extremely good. In addition, when a train line tension adjusting device is newly installed, it may be fitted in advance at a predetermined position of the swing rod 32, and in this case, the tubular body 6 may be annular.

Further, the projections 7a, 7b, 7c are pushed in contact with the eye fittings 31a or 31b in a well-balanced manner and slide very smoothly along the anti-vibration rod 32.
The bottom surface or the top surface of the cylindrical body 6 does not matter as long as the bottom surface or the top surface of the cylindrical body 6 is in contact with the eye fitting 31a.
It does not need to have a protrusion as long as it is in stable contact with b.

Further, in this embodiment, the staying force is exerted by the elastic force of the cylinder 6 in addition to the attraction force of the new rare earth magnet, but the elastic force of the cylinder 6 is not necessary. In addition, the cylindrical body 6
A part of the inner peripheral surface 61 of the above is formed by the permanent magnet 9, and the magnetic force of the permanent magnet 9 attracts the retaining rod 32 to stay there. The permanent magnet 9 need not be a new rare earth magnet.

[0023]

According to the present invention, the permanent magnet which forms the inner peripheral surface when the cylindrical body is attached to the swing rod by being closely attached to the upper surface or the lower surface of the eye fitting attached to the uppermost or lowermost weight. When the weight is moved by the expansion and contraction of the trolley wire due to the magnetic force of the trolley wire, it is pushed by the eye metal fittings and slides up or down along the swing rod, and the weight again moves to the original position. Even if it moves to, it is possible to display the maximum movement position of the weight by staying at that position due to the magnetic force. Therefore, the expansion and contraction width of the trolley wire and the movement width of the weight can be measured very easily and reliably. Moreover, since it is extremely small and lightweight, it is convenient to carry and has excellent workability. Further, in the case where the cylindrical body has elasticity and the peripheral wall is formed with the open portion, the attachment and the detachment to and from the swing rod are extremely easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an explanatory diagram showing a usage state in the embodiment shown in FIG.

FIG. 4 is an enlarged cross-sectional view taken along the line YY of FIG.

FIG. 5 is an explanatory view showing a conventional electric power line tension adjusting device.

[Explanation of symbols]

 3 Weight 6 Cylindrical body 9 Permanent magnet 61 Opening part

Claims (2)

[Claims] 1. A weight moving width measuring tool in an electric line tension adjusting device, wherein at least a part of an inner peripheral surface of a cylindrical body having a predetermined inner diameter is formed by a permanent magnet. 2. The weight movement width measuring tool in an electric line tension adjusting device according to claim 1, wherein the cylindrical body has elasticity and an opening is formed in the peripheral wall.