JP2001260717A - Wear detection apparatus for trolley wire and trolley wire structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wear detection apparatus capable of detecting the wear of an existing trolley wire by being attached to the wire. SOLUTION: Detection members 4 each comprising a conductor covered with insulating material are hung across the trolley wire 1 and retained by elastic retainers 6 and a cable 5 is connected to the detection members 4. When the conductor of each detection member 4 and the trolley wire 1 are short- circuited via a current collection device as the result of the wear of the lower surface of the trolley wire 1 due to sliding contact with the current collection device, it is detected that the wear of the trolley wire 1 has reached an allowable limit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley wire wear detecting device and a trolley wire structure for detecting that the wear of a lower surface of a trolley wire has reached an allowable limit.

[0002]

2. Description of the Related Art A trolley wire used for power supply in an electric railway is worn by sliding contact with a current collector such as a pantograph, and is replaced when the wear increases. The measurement of this wear situation is a midnight operation when the operation of the train is stopped,
Wear measurement was carried out in a time-consuming manner while running a car.

[0003] In recent years, in order to simplify the wear measurement, as described in, for example, Japanese Patent Application Laid-Open No. 9-156402, a coated lead wire for wear detection has been embedded in the trolley wire in advance. I have. That is, as shown in FIG. 4, a lead wire b covered with an insulating material is buried in two places on the left and right below the axis of the trolley wire a in parallel with the axis. As shown in FIG. 5, when the trolley wire a is worn down to the lead wire b, the main body of the trolley wire a and the lead wire b are short-circuited via the current collector c. Thus, it is possible to know that the wear of the trolley wire has reached the allowable limit.

[0004]

However, according to the trolley wire of the type embedded with lead wires, although the abrasion can be automatically detected, it is necessary to replace the trolley wire with an existing trolley wire. And In addition, the places where the trolley wire is heavily worn are near stations and curves, and it is often sufficient to monitor only the wear at such places.
The standard length of the lead wire-embedded trolley wire is usually 1500 m, and this expensive trolley wire is used in a portion where the wear is small and the detection thereof is not necessary, resulting in increased waste.

[0005] In addition, the manufacturing of the above-mentioned trolley wire with embedded lead wires involves an additional step of embedding the lead wires in the conventional trolley wire manufacturing process, and further requires different jigs and tools for each trolley wire size. Not only the number of man-hours increases, but also the capital investment becomes considerable, resulting in high costs.

Accordingly, the present invention proposes a wear detecting device which can detect the wear of the trolley wire by being attached to an existing trolley wire, and a structure of the trolley wire provided with such a wear detecting device. It is.

[0007]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention does not embed a member for detecting wear in a trolley wire, but holds the wear detection member outside the trolley wire. Is to be detected.

That is, the present invention relates to a trolley wire wear detecting device for detecting wear of a lower surface of a trolley wire, wherein a conductive material is coated with an insulating material and held by the trolley wire. A detection member disposed on the side surface and having a lower end provided at a position higher than the lowermost surface of the trolley wire, and electrically connected to a conductive material of the detection member, and a lower surface of the trolley wire is worn and And a cable for detecting the short circuit when the conductive member of the detection member short-circuits through the current collector.

In such a trolley wire wear detecting device, the lower surface of the trolley wire is worn by sliding contact with the current collector, and the trolley wire and the lower end of the conductive material of the detecting member are connected via the current collector. If a short circuit occurs, a current will flow through the cable, indicating that the wear of the trolley wire has reached the allowable limit.

Thus, the wear detecting device can be attached to the existing trolley wire, and the detecting member can be attached only to the portion of the trolley wire where the wear is expected to be severe. It can be installed regardless of the size and shape of the trolley wire simply by changing the length of the member. There is no need to manufacture and erection with a shape, the number of trolley wire manufacturing steps does not increase, and no dedicated manufacturing equipment is required, which is advantageous for cost reduction.

The conductive material of the detecting member is not limited as long as it is conductive, and may be a wire such as a single wire or a stranded wire, or a strip-shaped plate. Although not particularly limited, for example, a single copper wire is preferable from the viewpoint of low cost and reliability of detection.

The insulating material of the detecting member is not particularly limited in terms of its material and dimensions as long as the insulating property between the conductive material and the trolley wire is ensured. It is preferable to use a resin. The material and structure of the cable are not particularly limited as long as a short circuit can be detected.

The lower end of the conductive material of the detecting member can be exposed if it does not electrically contact the trolley wire, but it is conceivable that the lower end is short-circuited due to the adhesion of rain or snow. Therefore, the lower end of the conductive material is covered with the insulating material, and when the lower surface of the trolley wire is worn and the current collector comes into sliding contact with the lower end of the detecting member, the insulating material at the lower end of the detecting member is worn. It is preferable that the conductive material is exposed and the trolley wire and the conductive material are short-circuited via the current collector.

Further, the detection member may be disposed so as to hang down on the side surface of the trolley wire, or may be disposed so as to be wound from top to bottom along the side surface of the trolley wire. it can.

Further, according to the present invention, in the trolley wire wear detecting device as described above, the trolley wire is a grooved circular trolley wire having grooves extending in the longitudinal direction formed on upper portions of both side surfaces thereof. The conductive material is formed in a linear shape or a band shape covered with an insulating material, is hung across the trolley wire, and both ends are provided at a position higher than the lowermost surface of the trolley wire. It is characterized by further comprising an elastic holder for holding the detection member between the grooves on both sides of the trolley wire from both sides and holding the detection member on the trolley wire.

That is, the holding of the detection member on the trolley wire is not the mode of the present invention, but is performed by holding the detection member itself with an elastic force for sandwiching the trolley wire from both sides. For example, an insulating material having high rigidity is formed by coating a conductive material by injection molding of plastic, and thereby the detecting member is provided with an elastic force so as to hold the detecting member. Alternatively, it may be fixed to the trolley wire with an adhesive tape such as. However, as in the present invention, if the trolley wire has a groove on both sides thereof, the elastic holder may be used to sandwich the detection member between the grooves on both sides.
The detection member can be securely and easily held on the trolley wire.

Further, since the detecting member is linear or band-shaped and both ends are disposed on both sides of the trolley wire,
Even when one of the ends is short-circuited to the trolley wire, the fact can be detected via the cable, and the reliability of wear detection is increased.

Also, the present invention provides a trolley wire, each of which is formed by covering a conductive material with an insulating material, and which is hung and held so as to straddle the trolley wire at a longitudinal interval of the trolley wire. Electrically connect the plurality of linear or band-shaped detection members provided at a position higher than the lowermost surface of the trolley wire and the plurality of detection members, and the lower surface of the trolley wire is worn and the trolley wire is worn. A trolley wire structure, comprising: a cable for detecting a short circuit between the conductive member of the detecting member and the conductive member via the current collector.

With such a trolley wire structure, it is possible to detect the wear of the trolley wire by installing the trolley wire, and unlike the conventional lead wire embedded type trolley wire, the detecting member and the cable are not used. Instead of being embedded in the trolley wire, the detection member and the cable can be attached to the trolley wire after the trolley wire is manufactured, and the cost is reduced.

[0020]

As described above, according to the trolley wire wear detecting device according to the present invention, a detecting member which is covered with an insulating material by an electrically conductive material, is held by the trolley wire, and is disposed on the side surface thereof; Since the trolley wire is provided with a cable for detecting a short circuit between the trolley wire and the conductive material of the detection member when the lower surface of the trolley wire is worn, the wear can be detected by attaching to the existing trolley wire, Moreover, it can be locally attached to a site where heavy wear is expected.
It can be installed regardless of the size and shape of the trolley wire, and can greatly reduce the cost without impairing the reliability of wear detection compared to the case of installing a trolley wire with embedded lead wires. .

Further, according to the present invention, in the trolley wire wear detecting device as described above, a linear or belt-like detecting member is hung over the trolley wire, and the detecting member is elastically held on both sides of the trolley wire. Since the holding member is sandwiched and held in the groove, the detecting member can be easily and reliably held on the trolley wire, and the reliability of the wear detection is enhanced.

Further, the present invention provides a trolley wire, each of which is covered with an insulating material by an electrically conductive material, is hung and held so as to straddle the trolley wire at intervals in the longitudinal direction of the trolley wire, and has both ends. A plurality of linear or band-shaped detecting members provided at a position higher than the lowermost surface of the trolley wire, and the plurality of detecting members are electrically connected, and the lower surface of the trolley wire is worn and the trolley wire and the Since the trolley wire structure has a cable for detecting the short circuit when the conductive material of the detection member is short-circuited through the current collector, the same function as the conventional lead-embedded trolley wire is provided. While having, it will be cheaper than this.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a trolley wire wear detecting device 2 according to an embodiment of the present invention. The trolley wire 1 is a grooved circular trolley wire in which a groove 3 extending in the longitudinal direction is formed on the upper surface of both sides as shown in FIG. As shown in FIG. 2, the wear detection device 2 of this embodiment includes a plurality of detection members 4 provided at intervals in the longitudinal direction of the trolley wire;
A connection cable 5 connecting these detection members 4 and extending in the longitudinal direction of the trolley wire, a detection member 4 and a connection cable 5
And an elastic holder 6 for elastically holding the trolley wire 1 on the trolley wire 1. If the detection member 4 can be elastically held on the trolley wire 1 by itself,
The elastic holder 6 can be omitted.

The detecting member 4 is a covered electric wire in which a conductive wire (conductive material) 7 made of a single copper wire is covered with an insulating material 8 such as a fluororesin, and is hung over the trolley wire 1. The trolley wire 1 is suspended from both sides. That is, both ends of the conductive member 7 of the detection member 4 are located at a position higher than the lowermost surface of the trolley wire 1 when it is not worn and lower than the axial center height of the trolley wire 1 (wear allowed for the trolley wire 1). (At the height limit). Both ends of the conductive wire 7 are covered with an insulating material 8. The connection cable 5 is obtained by covering a conductive wire 5a with an insulating material. The conductive wire 5a is connected to the conductive wire 7 of each detection member 4, and is connected to a monitoring room such as a station to monitor the wear of the trolley wire 1. It has been extended.

The elastic holder 6 is made of a non-conductive material made of a highly rigid plastic material, and has a fitting portion 6a fitted to the top of the trolley wire 1 from above and both ends of the fitting portion 6a. And a rod-shaped holding portion 6b that holds the detection member 4 in series. The fitting portion 6a is formed in a substantially inverted U-shape corresponding to the outer shape of the cross section from the top of the trolley wire 1 to the grooves 3 on both sides thereof, and the holding portion 6b is connected to the lower end of the trolley wire 1 following the lower end of the fitting portion 6a. And extends horizontally along the groove 3. The elastic holder 6 is formed such that in the free state, the interval between the holding portions 6b on both sides thereof is smaller than the interval between the grooves 3 on both sides of the trolley wire 1, and the fitting portion 6a is fitted to the trolley wire 1. At this time, the holding portion 6b elastically clamps the detection member 4 in the groove 3 of the trolley wire 1.

As shown in FIG. 3, the detection of the wear of the trolley wire 1 is caused by the fact that the arc-shaped lower surface of the trolley wire 1 is worn by sliding contact with a current collector (rubbing plate of a pantograph) 9 as shown in FIG. The insulating material 8 at the lower end of the conductor is worn away, and the conductive wire 7 is exposed,
This is performed by detecting that the trolley wire 1 and the conductive wire 7 are short-circuited via the current collector 9. That is, when a voltage is applied to the connection cable 5, a current flows if there is the short circuit. By detecting the presence or absence of the current, it is possible to know that a part of the trolley wire 1 has reached the allowable wear limit. Further, the magnitude of the current value is inversely proportional to the distance from the voltage application point to the short-circuit point (the length of the connection cable 5), so that the short-circuit point can be known based on the current value.

Therefore, the wear detecting device 2 can be attached to the existing trolley wire 1 to detect the wear, and detect only the portion of the trolley wire which is expected to be severely worn. Since members can be attached, it is economical. Further, the wear detecting device 2 can be easily attached to the trolley wire 1 only by changing the length of the detection member 4 and the elastic holder 6 according to the size and shape of the trolley wire 1. Therefore, there is no need to manufacture and install an expensive and long wear detecting trolley wire of an appropriate size and shape such as a conventional lead wire embedded type trolley wire,
The manufacturing process of the trolley wire does not increase, and a dedicated manufacturing facility is not required. Since the lower end of the conductive wire 7 of the detection member 4 is covered with the insulating material 8, the conductive wire 7 is
And the trolley wire 1 are prevented from being short-circuited.

The elastic holder can be formed by a spring wire.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a trolley wire wear detection device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a trolley wire wear detecting device according to an embodiment of the present invention in a partial cross section.

FIG. 3 is a cross-sectional view similar to FIG. 1, showing a state where the trolley wire has been worn to an allowable limit by a current collector.

FIG. 4 is a sectional view of a conventional lead wire embedded trolley wire.

FIG. 5 is a cross-sectional view showing a state in which a conventional lead wire-embedded trolley wire has been worn to an allowable limit by a current collector.

[Explanation of symbols]

 Reference Signs List 1 trolley wire 2 wear detection device 3 groove 4 detection member 5 connection cable 6 elastic holder 7 conductive wire (conductive material) 8 insulating material 9 current collector (pantograph rubbing plate)

Claims (3)

[Claims] 1. A trolley wire wear detecting device for detecting wear of a lower surface of a trolley wire, wherein a conductive material is covered with an insulating material, and is held on the trolley wire and disposed on a side surface of the trolley wire. A detecting member having a lower end provided at a position higher than the lowermost surface of the trolley wire; electrically connected to a conductive material of the detecting member; And a cable for detecting the short circuit when the conductive material is short-circuited through the current collector. 2. The trolley wire wear detection device according to claim 1, wherein the trolley wire is a grooved circular trolley wire having a groove extending in a longitudinal direction formed on an upper portion of both side surfaces thereof. The member is formed in a linear shape or a band shape in which a conductive material is covered with an insulating material, is hung across the trolley wire, and both ends are provided at a position higher than the lowermost surface of the trolley wire, A trolley wire wear detection device, further comprising an elastic holder for holding the detection member between the grooves on both sides of the trolley wire from both sides and holding the trolley wire. 3. A trolley wire, each of which is covered with an insulating material by a conductive material, is held so as to straddle the trolley wire at intervals in a longitudinal direction of the trolley wire, and has both ends of the trolley wire. A plurality of linear or band-shaped detection members provided at a position higher than the lowermost surface of the trolley wire, and the plurality of detection members are electrically connected, and the lower surface of the trolley wire is worn and the trolley wire and the detection member And a cable for detecting a short circuit when the conductive material is short-circuited through the current collector.