JPH09182204A - Railroad car pantograph - Google Patents

Abstract

PROBLEM TO BE SOLVED: To operate trains smoothly by making it possible to remove snow accretion on a pantograph without climbing on the roof and thereby liberating workers from a dangerous work and shortening the time required for confirming safety and a working time. SOLUTION: A car pantograph 8 with a rise-preventing hook when folded and a lowering cylinder is provided with a force cylinder 6, which gives the moment to the direction where a pushing-up force is added to the main shaft of the pantograph 8 via a lever 7. The force cylinder 6 is connected to a rapid exhaust valve 5 and a speed controller 4 in series and linked to a portion of a pipe connected to a hook cylinder 10 for raising the pantograph. A car pantograph 8 with a mechanism to send pressurized air into the lowering cylinder 11 nearly the instant the pressurized air inside the force cylinder 6 is exhausted or with no rise-preventing hook when folded but with a force cylinder 6 which pushes up a bottom frame, etc., is equipped with the rapid exhaust valve 5 and the speed controller 4 connected to the head of the force cylinder 6 in series.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a pantograph for a railway vehicle.

[0002]

2. Description of the Related Art A conventional pantograph is shown in FIG.
FIG. 6 is a schematic view showing an example of a conventional air rising type lower frame crossing type pantograph, which has a structure without a hook for preventing the pantograph rising. In FIG. 6, the solenoid valve 16 and the push-up cylinder 13 are not normally provided, and these are the case where they are added to forcibly lift the pantograph. When there is no snowfall, when the solenoid valve 15 is excited, pressurized air is sent from the air tank 1 into the working cylinder 14 and the action of the lowering spring in the working cylinder is eliminated, so that the main spring 12 acts to raise the pantograph. , It rises gently due to the throttle 17 provided in the middle of the pipe. When lowering the pantograph, the solenoid valve 15 is demagnetized so that the pressure air in the working cylinder is exhausted from the solenoid valve, but since the throttle 17 and the piping are long, the pressure air is not immediately exhausted, so the pantograph slowly descends.

When the pantograph cannot be raised due to snowfall, the solenoid valve 16 is energized while the solenoid valve 15 is energized. The pressurized air in the air tank 1 also flows into the push-up cylinder 13 and pushes up the lower frame at the tip of the push-up cylinder, so this force raises the pantograph. Next, when the solenoid valves 15 and 16 are both demagnetized, the pressure air supplied to the operating cylinder 14 and the push-up cylinder 13 is exhausted, so the pantograph descends due to the weight of the snow, and the snow during the folding operation removes the snow cover. I was doing However, as described above, since the throttle 17 and the piping are long, the pressure air is discharged slowly and the pantograph descends slowly. Therefore, the snow is not falling.
In addition, a pantograph with a hook structure is often used at present, but the reality is that no measures have been taken for this.

[0004]

However, the above-described pantograph has the following problems.
Since the pushing force of the pantograph is usually about 5 to 6 kg, if the weight of snow accumulated on the pantograph exceeds the pushing force due to snowfall such as night when the vehicle is stopped for a long time, it will not rise even if trying to raise the pantoraf . In this case, it is necessary to lift the pantograph after removing the snow accumulated on the pantograph on the roof of the railway vehicle by a person. There are the following problems in performing this work. 1) It is necessary to turn off the power of the tramline in order to climb the vehicle, but it is necessary to confirm that even if the main power is turned off, it will not affect other work, and it will take a considerable amount of time for confirmation. 2) It is necessary to turn on the power of the tramline again after the work is completed. Since the length of the railway car is long, it takes a lot of time to confirm safety at this time. 3) The roof of the car is generally high and the roof has an R shape, so it is very dangerous for people to work on the roof. Accompany. 4) The work of removing snow by manpower is poor and takes time. Further, as described above, in the air rising type pantograph, a push-up cylinder is added to try to remove snow, but in many cases it is not practically useful. Nothing is done on the pantograph with hooks to prevent rising.

The present invention was devised in view of the above-mentioned points, and an object thereof is to solve these drawbacks, and to remove snow accumulated on a pantograph even if no person is on the roof. It is also an object of the present invention to provide a pantograph for a railway vehicle that eliminates dangerous work for humans and further shortens safety confirmation time and work time so as not to hinder the operation of the vehicle.

[0006]

That is, the means for achieving the object is to forcibly lift the pantograph and then rapidly lower the pantograph to remove the snow accumulated on the pantograph. In a pantograph with a hook for preventing lift (hereinafter referred to as a spring lift type), a speed controller, a quick exhaust valve, and a push-up cylinder are installed in parallel with the hook cylinder on the pantograph side so that they are connected. When pressure air is sent to raise the pantograph during snowfall, the pressure air flows into the hook cylinder and the push-up cylinder, the hook opens and the push-up cylinder pulls the lever of the pantograph in the upward direction (clockwise direction).

Therefore, the pantograph is forcibly raised by the push-up cylinder and is raised until the stroke of the push-up cylinder is completed. Next, when the ascending command is stopped, the pressurized air in the push-up cylinder is exhausted at once by the action of the quick exhaust valve, the pantograph rapidly descends, and the snowfall is dropped by the impact at the time of descending. By doing so, it is possible to remove the snow accumulated on the pantograph without a person climbing on the roof. Furthermore, the pantograph descending speed is increased,
When increasing the impact during folding to enhance the snow removal effect, at the same time as exhausting the pressurized air in the push-up cylinder,
It is possible to send pressurized air into a lowering cylinder, which is usually mounted on a pantograph, to further increase the descending speed.

In the conventional air-lifting pantograph with no hook, which is equipped with a push-up cylinder, a rapid exhaust valve and a speed controller are similarly connected in series to accelerate the descending speed during snowfall and to reduce the pantograph folding time. The impact can be increased. In normal conditions without snowfall, the speed controller opens the hook faster than the push-up cylinder operates, and the pantograph rises, so the operation is the same as when there is no push-up cylinder. The speed controller may be omitted if it is confirmed that the hook always opens faster than the push-up cylinder operation. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0009]

1 is a schematic diagram showing an embodiment of the present invention when a pantograph is folded, and FIG. 2 is a schematic diagram showing a pantograph which is unfolded as compared with FIG. FIG. 3 is an operation explanatory diagram corresponding to FIG. 2, and FIG.
(A), (b) is a schematic block diagram which shows other Example of this invention, and FIG. 5 is a connection diagram which shows the time elapsed state of operation | movement of a solenoid valve and each part. 1 to 4, in a pantograph for a railway vehicle having a hook 9 for preventing a rise and a lowering cylinder 11 for a descent when folded, a main shaft 19 of the pantograph has a
A push-up cylinder 6 that gives a moment in the direction of adding a push-up force via the lever 7 is installed, and the push-up cylinder 6, the quick exhaust valve 5 and the speed controller 4 are connected in series,
In addition, it is configured to be connected to the middle of the pipe supplied to the hook cylinder 10 for raising the pantograph. Further, in the present apparatus, the pressure air is sent into the lowering cylinder 11 almost at the same time as the pressure air in the push-up cylinder 6 is exhausted. Further, in a pantograph for a railway vehicle which does not have a hook 9 for preventing a rise when folded, and a pantograph having a push-up cylinder that pushes up a lower frame and the like, a quick exhaust valve and a speed controller are connected in series at the tip of the push-up cylinder. There are also things. Further, the speed controller 4 may be deleted in these devices. Next, the operation will be described. FIG. 1 shows a hook having a hook for preventing the pantograph from rising. The part surrounded by the one-dot chain line is a normal pantograph and the part surrounded by the dotted line is added by the present invention. Others are devices on the vehicle body side for operating the pantograph. When the solenoid valve 2 for raising is excited, pressurized air flows from the air tank 1 into the hook cylinder 10 to open the hook 9, so that the pantograph is moved upward by the force of the main spring 12. on the other hand,
The pressure air also flows into the speed controller 4 → quick exhaust valve 5 → pushing cylinder 6 at the same time, but since the air flow rate is limited by the speed controller 4, the hook cylinder
After 10 is opened and the pantograph rises above the hook 9, the push-up cylinder 6 starts operating.

Therefore, when there is no snow on the pantograph,
Since the lever 7 fixed to the main shaft 19 can freely move in the elongated hole at the tip end portion of the push-up cylinder, it operates in the same manner as a normal pantograph without the push-up cylinder 6 and ascends. Even after the push-up cylinder 6 operates to move the push-up cylinder 6 as shown in FIG. 2, the pantograph lever 7 can freely move in the elongated hole at the tip of the push-up cylinder 6. When descending, the lever 7 hits the left end of the long hole at the tip of the push-up cylinder, so it is difficult to descend due to the upward force of the push-up cylinder 6, and the descending force above the upward force of the push-up cylinder 6 is difficult to descend. You cannot descend unless you work.

However, since the solenoid valve 2 is demagnetized after a certain period of time has elapsed after the ascent, the pressure air to the push-up cylinder 6 is exhausted, and thereafter the push-up cylinder 6 has no ascending force and can descend as in the usual case. On the other hand, when the pantograph has snowfall and the amount of snow is greater than the pushing force of the main spring 12 of the pantograph, the pantograph does not rise even when the hook 9 is opened. In this case, the push-up cylinder 6 pulls the lever 7 in the elongated hole at the tip end so as to rotate clockwise,
The pantograph rises until the stroke of the push-up cylinder 6 is completed. (It should be understood that there is a certain limit because the pantograph does not rise when the amount of snowfall is greater than the pushing force of the pushing cylinder.) Pantograph 8
Moves up and down for a while due to inertia such as boat mass when rising, but demagnetizes the solenoid valve 2 after the movement stops.

The pressurized air in the push-up cylinder 6 is exhausted in the order of the rapid exhaust valve 5 → speed controller 4 → electromagnetic valve 2. The rapid exhaust valve 5 has air pressures p1 before and after the rapid exhaust valve 5.
If the difference in p2 is very small, the pressure air p1 on the push-up cylinder side is rapidly exhausted from the quick exhaust valve 5, so there is no need for a long pipe between the speed controller 4 and the solenoid valve 2 or the throttle 17 on the pantograph. Regardless of the pressure air in the push-up cylinder, the force that lifted the pantograph becomes zero at once, so the pantograph rapidly descends due to the weight of the snow. As a result, when the pantograph is folded, it receives an impact, and the vibration at that time causes the snow to fall off.
In order to further increase the impact force at the time of lowering, the lowering cylinder may be actuated depending on the operation of the solenoid valve shown in FIG. Almost at the same time when the solenoid valve 2 is demagnetized (because there is a length of pipe, the solenoid valve 3 is excited to send pressurized air to the pantograph lowering cylinder 11 to perform pantograph lowering operation. The lowering cylinder force accelerates the descending speed, and the impact force further increases.

It has been confirmed by experiments that, if the snow does not drop in one operation, the snow is removed in most cases by repeating this operation several times. When the snow is shaken off in this way, the pantograph can normally rise. FIG. 4 shows a case where the push-up cylinder 13 is installed in a conventional air-lifting pantograph. At this time, the pipe length between the push-up cylinder 13 and the solenoid valve 14 is long, and the exhaust hole of the solenoid valve 14 is small. Aperture on the thing or pantograph
Because the pressure air in the push-up cylinder is not exhausted rapidly even when the solenoid valve 14 is demagnetized due to 17, the pantograph descending speed due to the weight of snow is relatively gentle, and the impact force at the time of descending is small and snow should not be shaken off. There were many

Also in this case, as shown in FIG. 5 (a), if the speed controller 4 and the quick exhaust valve 5 are attached, the descending speed is increased and the snow is shaken off. In order to further accelerate the descending speed, as shown in FIG. 5B, if the pressure air in the working cylinder is discharged at the same time as the pressure air in the lifting cylinder is discharged, the pantograph is lowered by the spring force in the working cylinder. It is possible because power is added. Even if the speed controller 4 is not provided, the descending speed becomes faster than the current state in the air rising type pantograph without hook as shown in FIG. 5B, but the descending speed is further increased by exhausting the pressure air in the working cylinder. Since there is a throttle in the working cylinder circuit at times, it is difficult to discharge the pressurized air in the pushing cylinder and the working cylinder almost at the same time unless a speed controller is provided in the circuit.

Also in the case of the spring lift type pantograph as shown in FIG. 1, even if pressure air is supplied from the solenoid valve 2 by thinning the air pipe leading to the push-up cylinder, the push-up cylinder always operates. The speed controller is not necessary if it is done after opening. Further, this time, the shape of the pantograph is described in detail with the lower frame crossing shape, but it goes without saying that the same can be applied to the case of the diamond shape or the single arm shape.

[0016]

As described above, according to the present invention, when the railcar has snow and the pantograph cannot be lifted due to its weight, the snow cannot be removed by the conventional method in many cases. , People were climbing on the roof of the vehicle to remove snow, but without adding new piping to the vehicle body, adding a push-up cylinder etc. to the pantograph and performing a normal pantograph ascending operation allowed it to accumulate on the pantograph. It can remove the snow. For this reason, there is no dangerous work on the roof, and there is no disturbance in the vehicle operation schedule due to a drastic reduction in the time for cutting off the high voltage of the train lines.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a schematic configuration in a state in which a pantograph is folded.

FIG. 2 is a schematic configuration diagram in a state in which the folding of the pantograph is opened as compared with FIG.

FIG. 3 is an operation explanatory diagram corresponding to FIG. 2;

FIG. 4 is a schematic configuration diagram showing another embodiment of the present invention.

FIG. 5 is a related diagram showing a time-lapse state of the operation of the solenoid valve and each part.

FIG. 6 is a schematic configuration diagram showing a conventional example.

[Explanation of symbols]

 1 Air Tank 2 Solenoid Valve 3 Solenoid Valve 4 Speed Controller 5 Rapid Exhaust Valve 6 Push-up Cylinder 7 Lever 8 Pantograph 9 Hook 10 Key Cylinder 11 Lower Cylinder 12 Main Spring 13 Push-up Cylinder 14 Actuating Cylinder 15 Solenoid Valve 16 Solenoid Valve 17 Throttle 18 Air hose

Claims (4)

[Claims] 1. In a pantograph for a railroad vehicle having a hook for preventing a rise and a lowering cylinder for a descent when folded, a push-up cylinder that gives a moment in a direction to add a push-up force through a spindle of a pantograph is installed, A pantograph for a railway vehicle, wherein the push-up cylinder, a quick exhaust valve, and a speed controller are connected in series and connected to a middle of a pipe supplied to a hook cylinder for raising the pantograph. 2. The pantograph for a railway vehicle according to claim 1, wherein the pressure air is exhausted from the push-up cylinder almost simultaneously with the exhaust of the pressure air, and the pressure air is sent into the cylinder. 3. A pantograph for a railway vehicle which does not have a hook for preventing a rise when folding and a pantograph having a push-up cylinder that pushes up a lower frame or the like, wherein a quick exhaust valve and a speed controller are connected in series at the tip of the push-up cylinder. Pantograph for railway vehicles characterized by. 4. The pantograph for a railway vehicle according to claim 1, wherein the speed controller is deleted.