JP2566350Y2 - Track contactor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track contactor mounted on a track running vehicle, and forms a reliable electric circuit between a track and an overhead wire stretched above the track or between right and left tracks. For orbital contactors for

[0002]

2. Description of the Related Art In an electric railway, a track traveling vehicle 1 provided with an overhead wire work table 2 as shown in FIG. 5 is used for detecting the state of the overhead wire or repairing the overhead wire. There are many. This vehicle 1 is an improvement of a track for traveling on land, and iron wheels 6 and 7 for traveling on a track 5 are rotatably disposed near a front wheel 3 and a rear wheel 4 for traveling on a road. On the track 5, the vehicle 1
Is provided with a rotary jack portion 8 for changing the direction of the rotation jack. In addition, the overhead wire working table 2 provided on the loading platform 9 is disposed on a platform 11 via a lifting mechanism 12 in order to secure a required height between the overhead wire and the overhead wire 10. In addition, in many cases, a pantograph 13 for detecting the state of the overhead wire 10 is provided at the front end of the overhead wire working table 2, and the pantograph 13 is sometimes used for grounding the overhead wire to ensure safety during work. Was.

[0003] The overhead wire 1
When inspecting the condition of 0 or repairing the overhead wire 10,
First, the vehicle 1 enters the railroad crossing near the work site, lowers the rotary jack portion 8 on the track 5 while straddling the track 5, and lifts the vehicle 1 at the same time as the rotary jack portion 8.
The vehicle is turned 90 ° around the axis. After the vehicle 1 is oriented parallel to the track 5, the front and rear iron wheels are lowered onto the track 5 to enable track running by the iron wheels 6 and 7, and the rotary jack portion 8 is stored. Then, the front wheel 3 of the vehicle 1 is lifted off the track 5, and the rear wheel 4, which is a driving wheel of the vehicle 1, is brought into contact with the track 5, and the vehicle 1 is caused to run on the track 5 by rotating the rear wheel 4.

By the way, high voltage electricity is supplied to the overhead wire 10 in normal times, but the above-mentioned track-and-land traveling vehicle 1 is run on the track 5 to measure the state of the overhead wire 10 and to repair the overhead wire 10. In this case, the supply of electricity to the overhead wire 10 is stopped. However, even in the event that electricity flows to the overhead wire 10 by mistake during the operation, the work is conventionally performed with the ground between the overhead wire 10 and the track 5 in order to ensure the safety of the worker. Like that.

Conventionally, as this kind of grounding means, for example, one shown in FIG. 6 is known. In this case, a pair of rollers 17 are brought into contact with the iron wheel 7 (return side) of the vehicle 1, and an earth wire 18 extending from the pantograph 13 is connected to the rollers 17. Therefore, even if a high-voltage electricity flows to the overhead wire 10 by mistake during the operation, the electricity flowing from the overhead wire 10 to the pantograph 13 flows to the roller 17 through the ground wire 18 and further to the roller 17.
An electric circuit is formed that escapes to the track 5 after flowing from the surface of the steel wheel 7 to the surface of the iron ring 7, and the supply of electricity is cut off by a circuit breaker or the like in the substation, and the safety of the worker is secured.

When the rollers 17 are disposed not only on the return side of the track 5 but also on the left and right iron wheels 7 of the vehicle, an electric circuit is formed between the right and left tracks 5 via the vehicle body. Accordingly, a crossing barrier at a railroad crossing in the work section can be operated.

[0007]

[Problem to be solved by the invention] However, the orbit 5
It is known that the surface condition changes greatly depending on daily weather conditions and the like. For example, in the rainy season or the like, it is known that rust quickly forms on the surface of the track 5 and an oxide film is formed. And if this oxide film is interposed between the iron wheel 7 and the surface of the track 5, it tends to hinder conduction between the two,
The conventional grounding means for supplying electricity by contact between the iron wheel 7 and the track 5 as described above may lack reliability.

In the conventional grounding means, electricity is not directly passed from the roller 17 to the track 5 but is passed from the roller 17 to the track 5 through the iron wheel 7.
Since the transfer of electricity is performed by surface contact by rolling between them, the transfer of electricity becomes unstable due to the large number of contacts, and the flow of electricity becomes poor depending on the surface condition of the iron wheel 7. Problem.

Therefore, an object of the present invention is to provide a track contactor that allows electricity to flow directly to a track without passing through a steel ring and that can be reliably grounded irrespective of the surface condition of the track or the steel ring. And

[0010]

SUMMARY OF THE INVENTION That is, the trajectory contactor according to the present invention is to solve the problems described above, track traveling
A track contactor mounted on a vehicle,
It has a brush part composed of a number of metal wires
A rotation drive unit is provided on the brush part of
The rotation of the brush unit
Features that the track surface slides at the tip of the rib
And

[0011]

According to the above means, the track traveling vehicle moves.
At this time, the brush part is pressed directly against the track and slides
More so that the metal wires that make up the brush part
And the brush rotates on the track surface while rotating.
As a result, contact with the track is ensured, and even if an oxide film or the like is formed on the track surface, this can be scraped off and grounded reliably.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a track contactor according to the present invention; FIGS. 1 to 3 show an embodiment in which the track contactor 20 according to the present invention is mounted on the rear frame 21 of the above-described track traveling vehicle 1. FIG. The track contactor according to this embodiment includes a shaft 23 attached to the rear frame 21 via a rotating member 22, a metal holding cap 24 attached to a lower end of the shaft 23, and a holding cap 24. It comprises a brush part 26 fixed to 24 and an earth terminal 25 provided on the shaft 23 for connecting one end of the earth wire 18. The brush part 26 is fixed to the holding cap 24 in a state in which a large number of thin metal wires are bundled, and the tip of each metal wire is cut off one by one.
Therefore, when the brush portion 26 is pressed against the upper surface of the track 5, the distal end portion is slightly bent and spreads outward, and the distal end portion of each metal wire comes into contact with the upper surface of the track 5 in a state where it abuts. As a material of the metal wire forming the brush portion 26, for example, brass is preferable, but is not limited thereto. Also, the thickness and hardness of the metal wire can be freely selected.

On the other hand, the rotating member 22 is composed of a pair of arms 22a, 22b and a lower wall 22c connecting the arms, and the upper end of the shaft 23 is fastened to the lower wall 22c by a nut 28. . In addition, the turning member 22 has the upper ends of the arm portions 22a and 22b rotatably supported by the rear frame 21 of the vehicle, and includes a hydraulic cylinder (not shown).
By rotating in such a manner, the track contactor 20 rotates between a standby position P1 shown by a virtual line in FIG. 2 and an operating position P2 shown by a solid line in FIG. The track contactor 20 at the operating position P2 is fixed by engaging a lock pin 30 provided on the rotating member 22 side with a pin receiving portion 29 provided on the rear frame 21 side of the vehicle. Therefore, even if the brush portion 26 slides on the track 5, the track contactor 20 does not swing, and the pressing force of the brush portion 26 pressed against the track 5 can be kept constant. The lock function of this type is not limited to the above-described one. For example, a predetermined pressure is always applied to the brush unit 26 by using a hydraulic cylinder or the like, or the brush unit 26 is elastically pressed, so that the vehicle 1
Vibration received from the orbit 5 or the like may be absorbed. In this case, a known method can be used as the elastic force applying means.

The shaft 23 has a ground wire 18 connected thereto.
Is connected to the ground terminal 25, and the other end of the ground wire 18 is connected to the pantograph 13 of FIG. Accordingly, by bringing the pantograph 13 into contact with the overhead wire 10, high-voltage electricity flowing through the overhead wire 10 flows into the track contactor 20 through the ground wire 18, and is directly grounded from the brush portion 26 to the track 5.

The above-mentioned track contactor 20 only needs to be provided so as to be in contact with the track on the return side if only an electric circuit is formed between the overhead wire 10 and the track 5, but as shown in FIG. When the right and left tracks 5a and 5b are provided so as to be in contact with each other, a ground wire 31 different from the ground wire 18 from the pantograph 13 is provided between the left and right track contacts 20a and 20b. Thereby, the left and right tracks 5a and 5b can be short-circuited, and thereby a crossing barrier at a railroad crossing in the working section can be operated.

The track contactor 20 according to this embodiment
Rotates the brush unit 26 as shown in FIG.
It has a mechanism to make it work. That is, the shuff of the brush portion 26
The rotation drive unit 35 is connected to the
The carbon brush 36 is brought into contact with the
The fixing base 37 of the brush 36 is used as a terminal of the ground wire 18.
It is made. The output end of the rotation drive unit 35 has a shaft
The shaft 23 is connected to a lower end of the shaft 23.
The holding cap 24 of the brush part 26 is attached.
When the shaft 23 rotates, the carbon brush 36
In the sliding contact this peripheral surface, overhead line 10 flowing to the ground line 18
To the shaft 23.

Next, the operation of the above-mentioned track contactor 20 will be described. When the vehicle is traveling on a land road, the track contactor 20 is at the above-described standby position P1, and the brush portion 26 at the tip is jumping upward and rearward. Then, after the vehicle 1 is set on the track 5 and the iron wheels 6, 7 are lowered onto the track 5, the above-described rotating member 22 is rotated and set to the operating position P2 indicated by a solid line in FIG. this
At this time, the lock pin 30 is fitted into the pin receiving portion 29 and fixed.
And the tip of the brush part 26 presses the upper surface of the track 5 slightly.
It will be in a pressed state. Further, the rotation drive unit 35 is operated.
As a result, the brush portion 26 pressed against the upper surface of the track 5
The tip rotates in orbit.

When the vehicle 1 starts running in this state,
As the brush part 26 rotates, the upper surface of the track 5
Sliding. At this time, the brush part 26 is configured.
Each thin metal wire directly contacts the track 5, and
In order to slide while rotating the upper surface of the track 5, for example,
An insulating layer such as a thin oxide film is formed on the track 5
The oxide film is scraped off at the tip of the brush part 26
The brush part 26 will surely contact the track 5
Become

Therefore, even if high-voltage electricity flows through the overhead wire 10 by mistake, a reliable electric circuit is formed between the overhead wire 10 and the track 5. It is possible to reliably release electricity. FIG.
Between the left and right orbits 5a and 5b shown in FIG.
a, 5b can be reliably short-circuited by the track contactors 20a, 20b that slide.

Although the above-mentioned track contactor 20 is of a type in which the shaft 23 is exposed to the outside, the shaft 23 may be housed in a casing together with the carbon brush 36 in order to improve waterproofness. Also, ground wire 1
The means for conducting from the connection terminal 8 to the shaft 23 is not limited to the case where the carbon brush 36 is used as described above. Further, without separately providing the rotation drive unit of the brush unit 26 as described above, for example, the rotation of the iron wheel can be used as the rotation drive unit and transmitted to the brush unit 26 to be rotated.

In the above-described embodiment, the case where the shaft 23 is vertically lowered from the vehicle 1 and the brush portion 26 is pressed against the upper surface of the track 5 to slide is described. Is, of course, not limited to this. Further, the shape of the brush portion 26 is not limited to the above embodiment.

The mounting of the track contactor 20 is not limited to the above-described embodiment, but may be mounted on the rear frame 21 of the vehicle 1 so as to be rotatable left and right inward. However, the present invention is not limited to the above-described rear frame 21 of the vehicle 1 but may be directly attached to the front frame or the rotary jack portion 8 of the vehicle 1 shown in FIG.

Further, in the above-described embodiment, the case where the track contactor is mounted on the track running vehicle provided with the overhead wire working table has been described, but it is needless to say that the track contactor can be mounted on other vehicles running on the track.

[0024]

As described above, according to the track contactor according to the present invention, the brush portion of the metal wire provided at the tip is directly pressed against the track without the intervention of the iron ring, and the brush portion is pressed.
As the roller slides on the track surface while rotating , contact between the brush and the track is assured, and the ground is reliably grounded from the track contactor to the track regardless of the track surface condition, such as the formation of an oxide film on the track surface. There is an effect that can be done.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a track contactor according to the present invention.

FIG. 2 is a side view showing a mounting state of the track contactor.

FIG. 3 is a conceptual diagram of an earth circuit using the track contactor.

FIG. 4 is a side view similar to FIG. 2, showing a rotation drive unit of the track contactor .

FIG. 5 is a side view showing an example of a track running vehicle.

FIG. 6 is a perspective view of the vicinity of an iron wheel showing an example of a conventional grounding means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle 5 Track 10 Overhead wire 20 Track contactor 26 Brush part 35 Rotation drive part

Claims (1)

(57) [Scope of request for utility model registration] 1. A track contactor attached to a track running vehicle, comprising a brush portion formed by bundling a large number of metal wires at a tip portion, and a rotation drive portion provided on the brush portion.
When using, the rotation drive unit operates
A track contactor characterized in that the track section slides on the track surface at the tip of the brush section while rotating the brush section .