JP6147963B2 - Train brake system - Google Patents

Description

  The present invention relates to a train brake system, and in particular, even when brake force equalization control is performed, a train brake that can reliably release a reduced pressure state of a brake device and ensure normal braking operation. It is about the system.

  In general, a train is equipped with a brake system. Examples of such a brake system include a normal brake operation for stopping a normal train and an emergency brake operation for suddenly stopping the train in an emergency.

  As such a train brake system, conventionally, for example, a brake control device obtains a necessary brake force for each vehicle or carriage of a railway vehicle, and the entire train including a plurality of motor vehicles of the railway vehicle. The electric brake force of the vehicle is detected, and the fluctuation of the electric brake force is compensated by the air brake force of one vehicle or the carriage in the operation period from the deceleration of the railway vehicle or the stop to the stop by the brake force adjusting unit. A technique for distributing the air brake force is disclosed (for example, see Patent Document 1).

Japanese Patent No. 4638959

  However, in the technique described in Patent Document 1, an electric brake and an air brake are used together. However, when an emergency brake is operated in an emergency, an inertial force works immediately before the train stops, Have a problem of giving a very strong impact to passengers.

  For this reason, there has been proposed a device that performs brake force equalization control to reduce the air pressure of the brake device and loosen the brake force by the brake device before the train stops when the emergency brake is operated. However, if the brake device is kept decompressed after the brake force equalization control is performed, there is a problem that a normal brake operation cannot be performed, which is dangerous.

  The present invention has been made in view of the above points, and even when the brake force equalization control is performed, the decompression state of the brake device can be surely released to ensure a normal brake operation. The object is to provide a brake system.

In order to achieve the above object, the present invention provides a train brake system comprising: a brake device mounted on a train for braking a wheel; and an on-board device for controlling the operation of the brake device. With
The onboard device, when detecting a train stop after performing the emergency brake control with switching of vacuum relays of the brake device, to control so as to terminate the vacuum operation by switching of the vacuum relay of the brake device Features.
The invention according to claim 2 is the brake device according to claim 1, wherein the on-board device is decelerated after performing emergency brake control of the brake device and before detecting a train stop. It is characterized by controlling so as to weaken the braking force.
The invention according to claim 3 is characterized in that, in claim 1 or 2, the brake device performs a braking operation of the wheel for emergency brake control of the brake device by air pressure.

According to a fourth aspect of the present invention, in the vehicle equipment according to any one of the first to third aspects, the on-board device starts a brake force equalization control of the brake device and detects a train stop, and then a certain time has elapsed. Then, the pressure reducing operation of the brake device is terminated.

The invention according to claim 5 is the vehicle according to any one of claims 1 to 4 , wherein the on-board device stops the train based on the expected stop time of the train calculated at the time of brake force equalization control. It is characterized by detecting.
The invention according to claim 6 is characterized in that, in claim 5, the on-board device detects that the train has stopped with the passage of the expected stop time, and detects the stop of the train. And

According to a seventh aspect of the present invention, in the vehicle equipment according to any one of the first to fourth aspects, the on-board device detects a stop of the train by a detection signal of a tacho generator that detects a rotation amount of the wheel. It is characterized by.

According to the invention of claim 1, the on-board equipment, upon detecting train stop after performing the emergency brake control with switching of vacuum relay of the brake device, terminates the vacuum operation by switching the vacuum relay of the brake system Thus, when the emergency brake is operated, the reduced pressure state of the brake device can be reliably released by switching the reduced pressure relay, and the subsequent normal braking operation of the brake device can be ensured.

According to the fourth aspect of the invention, the on-board device starts the braking force equalization control of the brake device and detects the stop of the train. When the emergency brake is operated, the reduced pressure state of the brake device can be reliably released, and the subsequent normal braking operation of the brake device can be ensured.

According to the fifth aspect of the present invention, since the on-board device detects the stop of the train based on the expected stop time of the train calculated at the time of the brake force equalization control, the stop detection by the tachometer is usually performed. Since the signal level is low and the frequency is low, it may take time until the stop is detected. However, according to the present invention, the stop of the train can be reliably detected, and the brake is detected based on the detection of the train stop. The reduced pressure state by force equalization control can be reliably released.

According to the seventh aspect of the present invention, since the on-board device detects the stop of the train by the detection signal of the tacho generator, the stop of the train can be reliably detected, and the detection of this train stop is detected. Therefore, the decompression state by the brake force equalization control can be reliably released.

1 is a schematic configuration diagram showing an embodiment of a train brake system according to the present invention. It is explanatory drawing which shows the relationship between the braking force equalization control and pressure reduction relay in embodiment of the brake system of the train which concerns on this invention. It is a flowchart which shows operation | movement of embodiment of the brake system of the train which concerns on this invention.

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

  FIG. 1 is a schematic configuration diagram showing a first embodiment of a train brake system according to the present invention. The train 1 is provided with a cab 2 on which the driver performs various operations. The train 1 is equipped with a train control device 3 that controls the train 1 based on the operation of the cab 2.

  Further, the train 1 is provided with a drive motor 5 for rotationally driving the wheels 4. The train 1 presses the brake shoes 6 against the outer peripheral surface of the wheels 4 or a dedicated brake disk with a pressure such as air. A brake device 7 is provided for operating and braking the wheels 4. The drive motor 5 and the brake device 7 are configured to be driven and controlled by the train control device 3 based on an operation signal sent from the cab 2 according to the operation of the driver.

  In addition, the brake device 7 is provided with a pressure reducing relay 8, and the pressure reducing relay 8 is switched to ON to release the supply air pressure supplied to the brake device 7 to reduce the pressure, thereby controlling the brake device 7. It is comprised so that motive power can be reduced.

  Further, the train 1 is provided with an on-board device 9 connected to the train control device 3, and the train 1 is provided with a speed generator that outputs a signal corresponding to the rotation of the axle, a so-called tacho generator 10. It has been. The on-board device 9 is configured to calculate the travel distance information and travel speed information of the current train 1 based on the output signal from the tacho generator 10 and output it to the train control device 3. 3 is configured to control the train 1 based on information from the on-board device 9.

  In order to alleviate the impact immediately before stopping when the train 1 is stopped by an emergency brake such as in an emergency, a device that performs brake force equalization control has been proposed. Here, the braking force equalization control means that when the emergency brake is operated, when the train 1 is decelerated to a predetermined speed or less, the decompression relay 8 is turned on to reduce the supply pressure to the brake device 7. The brake force of the brake device 7 is weakened by reducing the pressure.

  In this embodiment, as shown in FIG. 2, when it is detected that the train 1 has stopped after the brake force equalization control is performed and the decompression relay 8 is switched ON, the stop of the train 1 is stopped. After the detection, the decompression relay 8 is switched to OFF to control to terminate the decompression operation of the brake device 7. And after the time until the train 1 calculated by the onboard device 9 stops, when a certain time has passed, the pressure reducing relay 8 is switched off and the pressure reducing operation of the brake device 7 is terminated. It is something to control. In the present embodiment, after a time until the train 1 stops, when a certain time has elapsed, the pressure reducing relay 8 is switched OFF to end the pressure reducing operation of the brake device 7. However, it may be controlled so that the depressurization operation of the brake device 7 is terminated by switching the depressurization relay 8 to OFF immediately after the elapse of time until the train 1 stops, with the predetermined time being zero.

  In this case, the stop of the train 1 is detected based on the current speed of the train 1 based on the tacho generator 10 and the deceleration of the train 1 by the on-board device 9 when the brake force equalization control is performed. By performing linear interpolation, the predicted time until the train 1 stops is calculated, and the stop of the train 1 is detected based on the predicted time.

  The stop of the train 1 may be detected by calculation as described above, or the tacho generator 10 may detect that the train 1 has actually stopped.

  Next, the operation of this embodiment will be described with reference to the flowchart shown in FIG.

  First, in the present embodiment, when the emergency brake is operated by the train control device 3 (ST2) while the train 1 is traveling (ST1), the brake device 7 is operated by the train control device 3, and the train 1 The deceleration starts. When the speed of the train 1 decreases to the brake force equalization control speed, the decompression relay 8 is switched to ON, the supply pressure of the brake device 7 is reduced, and the brake force equalization control of the brake device 7 is started (ST3). ).

  Then, after performing the braking force equalization control, the onboard device 9 calculates the predicted time until the train 1 stops based on the current speed of the train 1 based on the tacho generator 10 and the deceleration of the train 1 Then, the stop of the train 1 is detected based on the predicted time (ST4). When a certain time has elapsed after detecting the stop of the train 1 (ST5: YES), the decompression relay 8 is switched to OFF and the decompression operation of the brake device 7 is terminated (ST6).

  In this embodiment, the control for sequentially performing the speed calculation, deceleration calculation, emergency brake input presence / absence determination, train 1 stop determination, and brake equalization control execution or termination determination in one embodiment is set as one cycle. For example, this cycle is repeated every 20 msec.

  As described above, in the present embodiment, when emergency braking operation is performed, the decompression relay 8 is switched to ON and brake force equalization control is performed, and after detecting a stop of the train 1, Since the pressure reducing relay 8 is switched off to release the reduced pressure state of the brake device 7, the reduced pressure state of the brake device 7 can be reliably released when the emergency brake is operated, It is possible to ensure normal braking operation.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible based on the meaning of this invention.

DESCRIPTION OF SYMBOLS 1 Train 2 Driver's cab 3 Train control device 4 Wheel 5 Drive motor 6 Brake shoe 7 Brake device 8 Decompression relay 9 On-board device 10 Tacho generator

Claims (7)

A brake device mounted on a train for braking the wheel, and an on-board device for controlling the operation of the brake device;
The onboard device, when detecting a train stop after performing the emergency brake control with switching of vacuum relays of the brake device, to control so as to terminate the vacuum operation by switching of the vacuum relay of the brake device The train brake system that features it.   The on-board device performs control so as to weaken the braking force of the brake device by depressurization after the emergency braking control of the brake device is performed and before the train stop is detected. The train brake system according to claim 1.   The train brake system according to claim 1 or 2, wherein the brake device performs a braking operation of the wheel for emergency brake control of the brake device by air pressure.   4. The on-board device ends the pressure reducing operation of the brake device after a predetermined time has elapsed after starting the braking force equalization control of the brake device and detecting a train stop. The train brake system according to any one of the above.   The said on-board apparatus detects the stop of the said train based on the estimated stop time of the said train calculated at the time of brake force equalization control, The Claim 1 characterized by the above-mentioned. Train brake system.   6. The train brake system according to claim 5, wherein the on-board device detects that the train has stopped with the elapse of the expected stop time, and detects the stop of the train. 7.   5. The train brake according to claim 1, wherein the on-board device detects a stop of the train by a detection signal of a tacho generator that detects a rotation amount of the wheel. system.

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