JP2007189754A - Pantagraph for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device which prevents the increase of the accident of an overhead line or a pantagraph by breaking the balancing rod of the pantagraph thereby lowering the pantagraph, and also detecting the balancing rod broken by air pressure and lowering other pantagraphs, too. <P>SOLUTION: The mounting pin 11 at a coupling section 7a which axially supports the balancing rod 6 rotatably is provided with a blowhole 13a to be charged with pressurized air by an air pipe. When excessive power works on the collector shoe of the pantagraph or the frame for supporting the collector shoe, this mounting pin 11 breaks, and the supporting point of the balancing rod is lost, so the frame having lost its balance falls down entirely, and separates from the overhead line 10. At the same time, the pressurized air is released from the blowhole 13a, and a pressure sensor 14 detects the drop of pressure, and sends a signal for lowering other pantagraphs to a solenoid valve 15. By having constituted the above system, it is easy to handle, and it can improve the reliability on the prevention of the increase of the accident of the overhead line or the pantagraph. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  According to the present invention, when an excessive force is applied in the vehicle traveling direction to the current collector boat of the pantograph or the frame supporting the current collector boat while the vehicle is running, The pantograph is also related to a pantograph with a descent device that descends urgently and prevents the accident of overhead lines and pantographs.

FIG. 2 is a mechanism diagram of the entire pantograph for explaining a single arm type pantograph. In the figure, 1 is a current collecting boat, 2 is a boat support, 3 is an upper frame, 4 is a lower frame, 5 is a balance rod, 6 is a balancing rod, 7 is a base frame, 8 is an insulator, 9 is a body, 10 Is an overhead line.
The pantograph shown in the figure is attached to a boat support 2 attached to a current collecting boat 1 with upper ends of an upper frame 3 and a balance rod 5 being rotatably attached by connecting rods 3a and 5a. The balance rod 5 is attached to the balance rod 5 by a connecting portion 5b, and the upper end of the lower frame 4 is attached to the upper frame 3 by a connecting portion 3b. The lower end of the lower frame 4 is rotatably attached to the frame 7 by a connecting portion 7b.
Furthermore, the upper end of the balancing rod 6 is rotatably attached to the upper frame 3 by the connecting portion 3c, and the lower end of the balancing rod 6 is rotatably attached to the base frame 7 by the connecting portion 7a. For example, as one conventional example, the connecting portions 3c and 7a are partially provided with V-grooves, etc., and are sheared when subjected to a strong load, the balancing rod 6 loses its support and the pantograph descends to prevent an overhead wire accident. Yes. (For example, see Patent Document 1)

FIG. 3 is a view showing a structure for attaching the countering bar 6 to the frame 7 in the connecting part 7a, and is a view of the connecting part 7a of the countering bar 6 shown in FIG. 2 as viewed from the overhead line side. .
As shown in the figure, a mounting pin 11 is inserted into a holder 12 fixed to the underframe 7, and a joint 6 a of a balancing rod 6 is pivotally supported on the mounting pin 11.

FIG. 4 is an air circuit diagram of the lowering device. In the figure, 14 is a pressure sensor, 15 is a solenoid valve, 16 is a signal wire, and 17 is a lowering cylinder.
The pressure air filled in the air pipe is released from the air holes 13 a due to breakage of the mounting pins 11. Although the pressurized air is always filled from the air source 13d, the filling speed is slower than the exhaust speed from the air hole 13a because of the throttle 13c provided in the middle of the air pipe 13. Therefore, when the pressure in the air pipe between the air hole 13a and the throttle 13c is suddenly reduced and becomes equal to or lower than the set pressure, a signal is sent from the pressure sensor 14 to the electromagnetic valve 15, the electromagnetic valve 15 is switched, and the lowering cylinder 17 is turned on. Operates to lower the pantograph.

FIG. 5 is a configuration diagram of a current collector boat having a conventional air hole. As shown in the figure, an air hole 13a is provided in the sliding plate of the current collecting boat 1, and pressurized air is supplied into the hole by an air pipe. When a large force is applied to the current collecting boat 1, the sliding plate 1a is broken, pressure air is released from the cracked portion, and the pressure in the air pipe is reduced.
JP 2005-006390 A

Conventionally, there has been a pantograph with a descent device, but the conventional descent device method is to provide an air hole inside the sliding plate 1a and fill it with air pressure. In this case, an excessive external force is applied to the sliding plate 1a. It was intended to lower the pantograph by detecting a drop in air pressure due to the breakage of the sliding plate.
In this method, since it is necessary to provide the air hole 13a in the part of the sliding plate 1a, there are restrictions on the material and fixing method of the sliding plate 1a and the type of the boat body 1b, and the air pipe 13 is arranged along the framework. It was necessary to route to the current boat 1. Therefore, it takes time to replace the sliding plate, it takes time to fix the air piping, it is easy to detect falsely due to deterioration of the air piping, the air piping becomes a noise source during traveling, and the air piping By attaching it to the frame, there were problems such as impeding the operation of the pantograph and aerodynamic characteristics, resulting in a decrease in the current collecting performance of the pantograph.
The present invention solves such a problem, and when an excessive force is applied to the current collector boat of the pantograph or the frame supporting the current collector boat with a simple structure without affecting the original performance of the pantograph. The present invention provides a pantograph for a vehicle that urgently lowers all pantographs mounted on a vehicle and prevents an accident from spreading to an overhead line or a pantograph.

The invention according to claim 1 is a vehicle pantograph having a current collecting boat and a frame that supports the current collecting boat, and an attachment that rotatably supports a counter rod that is a part of the frame. A hole that does not penetrate the pin in the axial direction of the mounting pin is made in the pin, and the hole is filled with pressurized air from the air source prepared in the vehicle through the air piping. When an excessive force acts on the pantograph current collector boat or the frame that supports the current collector boat due to an abnormal overhead line or a collision with a flying object, the mounting pin breaks down and the pressure air from the hole In such a manner that the air pressure in the air pipe is rapidly reduced.

The invention according to claim 2 is the pantograph for a vehicle according to claim 1, wherein a pressure sensor is provided for detecting that the pressure in the air pipe has dropped, and the air in the air pipe is broken by breakage of the mounting pin. When the pressure becomes lower than the set pressure, a signal for lowering the pantograph is generated by the pressure sensor, and the pantograph and a plurality of subsequent pantographs in the same organization are quickly lowered.

The present invention has the following effects.
1) When an excessive force is applied to the current collector boat of the pantograph or the frame that supports the current collector boat due to an abnormal overhead line or a collision of flying objects, the mounting pin 11 that supports the counter rod constituting the frame Break. The mounting pin 11 is provided with an air hole 13a. Since the hole is filled with pressurized air, the mounting pin 11 breaks, and at the same time, the compressed air is released from the air hole 13a. It can be detected by the pressure sensor 14 that the air pressure has fallen, and the pantograph can be lowered urgently to prevent a serious accident involving an overhead wire or a pantograph.
2) Since the structure is simple and the shape and mass of the entire pantograph are almost unchanged, it is easy to handle and does not adversely affect the aerodynamic characteristics and operation of the pantograph. An effect can be obtained.

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.
This figure shows a view of the connecting portion 7a of the counter bar 6 of FIG. 2 as viewed from the overhead line side. As shown in the figure, a mounting pin 11 is attached to a holder 12 fixed to a frame 7, and a joint 6 a fixed to a counterbalance 6 is pivotally supported on the mounting pin 11. The balancing rod 6 and the joint 6a have the same shape as the conventional example, but in this embodiment, an air hole 13a is provided in the mounting pin 11, and further, an air source 13d is provided in the air hole 13a. Pressure air is filled through the air pipe 13. The shape of the air hole 13a is set so as to be broken when a large force acts on the balancing rod.

In the present embodiment, since the mounting pin 11 is provided with the air hole 13a, when an excessive force is applied to the current collector boat of the pantograph or the frame supporting the current collector boat, the mounting pin 11 breaks. The pressure sensor 14 detects that the pressure air is released from the air hole 13a and the pressure in the air pipe 13 is lowered, and the pantograph is lowered.

It is a figure which shows the structure of the Example of this invention. It is a mechanism diagram of a pantograph conventionally used. It is a figure which shows the attachment structure of the conventional balance bar. It is an air circuit diagram of a descent device. It is a block diagram of the current collector boat which has the conventional air hole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Current collecting boat 1a Sliding board 1b Boat body 2 Boat support 3 Upper frame 3a, 3b Connection part 3c Connection part 4 Lower frame 5 Balance rod 5a, 5b Connection part 6 Balance rod 6a Joint 7 Base frame 7a, 7b Connection part 8 Insulator 9 Body 10 Overhead wire 11 Mounting pin 12 Holder 13 Air pipe 13a Air hole 13b Air pipe joint 13c Throttle 13d Air source 14 Pressure sensor 15 Solenoid valve 16 Signal wire 17 Lower cylinder

Claims (2)

In a vehicle pantograph having a current collecting boat and a frame that supports the current collecting boat, the shaft of the mounting pin with respect to a mounting pin that rotatably supports a balancing rod that is a member constituting a part of the frame By providing a hole not penetrating in the direction and filling the hole with pressurized air from the air source prepared in the vehicle through the air pipe, abnormalities of overhead wires and collision of flying objects while the vehicle is running When an excessive force is applied to the current collector boat of the pantograph or the frame supporting the current collector boat, the mounting pin breaks and releases the compressed air from the hole, A pantograph for a vehicle, characterized in that a system in which the air pressure in the pipe rapidly decreases is configured. The pantograph for a vehicle according to claim 1, wherein a pressure sensor is provided for detecting that the pressure in the air pipe has dropped, and the air pressure in the air pipe falls below a set pressure due to breakage of the mounting pin. A vehicle pantograph is characterized in that a system for lowering the pantograph and a plurality of succeeding pantographs in the same organization by using the pressure sensor is provided.

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