JPH0885458A - Railroad crossing control device - Google Patents

Abstract

PURPOSE: To provide a railroad crossing control device capable of effectively sending the emergency stop signal without delay to a train approaching a railroad crossing and capable of preventing the shift of the warning start point to a far site and the extension of the warning time. CONSTITUTION: This railroad crossing control device is provided with a timer TM setting the time from the warning start of a railroad crossing warning unit to the descent completion of an entry side shut-off rod, a relay RPSlR recovered after the time set by the timer TM, a T1 time setter setting the time T1 until a trouble reporting relay ER is recovered after one of light receiving relays is recovered, and a T2 time setter setting the time T2 shorter than the time T1. A control relay circuit 11 is provided with controllers CL1, CL2, CL3 controlling to select the T1 time setter or the T2 time setter and relays TR1, TR2, TR3 connected to the output terminals B of the controllers CL1, CL2, CL3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railroad crossing control device capable of effectively issuing an emergency stop signal to a train approaching a railroad crossing.

[0002]

2. Description of the Related Art FIG. 6 is a schematic plan view and an operation time chart showing a position of a train and a state of an alarm operation with respect to a railroad crossing in a conventional railroad crossing control device taking a one-sided line of a double-track section as an example. 1 is a rail, 2 is a train, 3 is a railroad crossing, 4 is a railroad crossing breaker, 5 is a train detector at an alarm start point A, and 6 is an alarm end point B
Each of the train detectors is shown. AR is a level crossing alarm provided near the level crossing 3. The APR is a reaction relay of the train detector 5 at the alarm start point A, which is constantly operating when the train 2 is not at the alarm start point A and is restored when the train 2 enters the alarm start point A. BPR is a reaction relay of the train detector 6 at the alarm end point B, and is constantly restored when the train 2 is not at the alarm end point B, and the train 2 is at the alarm end point B.
It works when you come into. R is an alarm control relay, which is restored by restoration of the reaction relay APR, and is brought into an operating state by restoration of the reaction relay BPR after the train 2 has passed the alarm start point B. There are two crossing gates 4 on the approaching side and the advancing side. The approaching side blocking rod 4a of the crossing barrier 4 starts descent after the warning of the crossing alarm AR, for example, after 4 seconds, and completes the descent after 6 seconds. However, the advancing side blocking rod 4b of the railroad crossing blocker 4 starts to descend after the approaching side blocking rod 4a has completed the descent, and completes the descent after 6 seconds.

FIG. 7 shows an installation example of a level crossing obstacle detection device that utilizes the spatial transparency of light, which is widely used among various types of level crossing obstacle detection devices using light, electromagnetic waves, loop coils, etc. as detection media. , S1, S2, S3 are light emitters, R1, R2,
R3 represents a light receiver, and the light rays emitted from the light emitters S1, S2, S3 form a pair of light receivers R1, R2, R3, respectively.
It is installed so that it can be received by. And
When an obstacle such as an automobile gets stuck at the railroad crossing 3, one of these light beams is blocked and its presence is detected.

FIG. 8 shows light emitters S1, S2, S3 and a light receiver R.
1 shows an example of electrical connection of 1, R2 and R3.
When the train 2 enters the alarm section (section from the alarm start point A to the alarm end point B) and the alarm control relay R is restored, power is supplied to the light emitters S1, S2, S3 through the restoration contact, and light rays are received. Fired towards vessels R1, R2, R3. When the light beam is not blocked by an obstacle, the light receiver relays RR1, RR2 of the light receivers R1, R2, R3
Each RR3 operates.

A portion surrounded by a dotted line in FIG. 9 shows an example of a control relay circuit 8 based on a conventional relay contact network provided in the railroad crossing control device. ER is a trouble notification relay, and when the train 2 is not in the warning section, a warning control relay R
It is a slow release relay that is energized and operating through the operation contact of, and recovers after a certain period of time when the energization is cut off. Normally, the slow release time of this relay ER depends on the level crossing alarm AR.
Is repeated every 1 to 2 seconds until a person or a vehicle that has entered just before the alarm starts crossing railroad crossing 3, so the relay ER does not recover unnecessarily even if such an instantaneous interruption is repeated. Is set to 5 to 6 seconds. When the relay ER is restored, for example, the special signal light emitter (emergency stop signal transmitter) 9 is turned on to issue an emergency stop signal to the train 2. When the train 2 enters the alarm section, the power supply through the operation contact of the alarm control relay R is cut off, but when there is no obstacle such as a car at the railroad crossing 3, the light receivers R1, R2 and R3 receive light. Power is supplied through the operating contacts of the relays RR1, RR2, RR3, and the relay ER maintains its operation. If there is an obstacle at the railroad crossing 3, one of the light receiving relays RR1, RR2, RR3 of the light receivers R1, R2, R3 whose light rays have been blocked is restored, and the relay ER is restored after the set time, The signal light emitter 9 issues an emergency stop signal to the train 2.
The operation contact of the relay BPR at the alarm start point B inserted in parallel with the operation contact of the light receiving relay RR2 is such that the light beam from the light emitting device S2 to the light receiving device R2 is distributed so as to traverse the rail 1 The purpose is to prevent the relay ER from being unnecessarily restored by being blocked by the relay.

FIG. 10 is an operation time chart of a conventional railroad crossing control device including the control relay circuit 8. The light beam from the light emitter S1 is blocked by an obstacle before the entrance side blocking rod 4a of the railroad crossing breaker 4 is completely lowered. In this example, the light receiving relay RR1 is restored, the relay ER is restored after T4 seconds, and the special signal light emitter 9 issues an emergency stop signal to the train 2. FIG. 11 is a similar operation time chart, in which the light beam from the light emitting device S1 is blocked by an obstacle after the advancing side blocking rod 4a of the railroad crossing breaker 4 starts to descend, and the light receiving relay RR1 is restored. This is an example in which the special signal light emitting device 9 has issued an emergency stop signal to the train 2 after being restored. As described above, in the conventional device, the time until the relay ER is restored after the light receiving relay RR1 is restored before and after the approach side blocking rod 4a of the railroad crossing barrier 4 is completely lowered is T4 seconds. Is 1 second, the passer-by vehicle that has entered the railroad crossing 3 immediately before the descent repeats the instantaneous output of the obstacle detection signal within the time until the crossing of the railroad crossing 3 is completed, and the obstacle does not exist. Instead, there are many opportunities to issue an unnecessary emergency stop signal to the train 2. To prevent such excessive detection operation,
Normally, the above detection time (T4 seconds) is set to, for example, 4 to 6 seconds.

[0007]

By the way, in the above-mentioned conventional device, as is apparent from FIG. 11, the trouble notification relay ER is restored after T4 seconds even after the advancing side blocking rod 4a of the railroad crossing barrier 4 is completely lowered. Therefore, the time for issuing the emergency stop signal to the train 2 will be delayed by that much, and even if the train 2 recognizes the emergency stop signal, it approaches the railway crossing 3 too much,
In some cases, even if the train 2 recognizes the emergency stop signal, there is a problem that the braking distance is insufficient and the train cannot stop immediately before the railroad crossing 3. Therefore, when installing a new level crossing obstacle detection device, it is necessary to move the alarm start point A of the level crossing 3 further away from the level crossing 3 to ensure a sufficient braking distance for the train 2. In this case, on the contrary, the alarm time of the railroad crossing alarm device AR becomes long, which has the adverse effect of increasing the frustration of the pedestrian vehicle waiting for the train 2 to pass and increasing the number of railroad crossings without opening.

Therefore, in view of the conventional situation as described above, the present invention provides a relatively long time continuation as long as there is time before the train reaches the railroad crossing immediately after the train enters the railroad crossing warning section. Therefore, when an obstacle is detected, it is determined that there is an obstacle, and when the train approaches the railroad crossing relatively after the entrance side blocking rod of the railroad crossing barrier has completed descending, the obstacle is detected quickly. When it is detected continuously for a time relatively shorter than the above time, it is judged that there is an obstacle, and it is possible to effectively notify the train approaching the railroad crossing without delaying the emergency stop signal, and an alarm is issued. It is an object of the present invention to provide a railroad crossing control device that can prevent the start point from being moved to a distance and the alarm time from being extended.

[0009]

In order to achieve the above object, the present invention provides a crossing control device as described above,
Further, in the control relay circuit, a timer TM that sets the time from the alarm start of the railroad crossing alarm device AR to the completion of the descent of the approach side blocking rod, a relay RPS1R that recovers after the time set by the timer TM, and a light receiving relay RRn. Time T until the trouble notification relay ER is restored after either of them is restored
It has a T1 time setting device set to 1 and a T2 time setting device set to a time T2 shorter than T1 time, the input terminal A is connected to the operation contact of the light receiving relay RRn, and the control input terminal C is a relay. Receiving relay RRn is restored before completion of the descent of the entrance side blocking rod of the railroad crossing breaker, which is connected to the operating contacts of RPS1R and relay R
If PS1R is operating, select the T1 time setter, and if the light receiving relay RRn is restored and the relay RPS1R is restored after the descent of the advancing side blocking rod of the railroad crossing breaker is started, select the T2 time setter. Control unit CL for controlling
n, and a relay TRn connected to the output terminal B of the control unit CLn and restored by the restoration of the control unit after T1 time set by the T1 time setting device or after T2 time set by the T2 time setting device. The failure notification relay ER is restored by the restoration of the relay TRn, and the emergency stop signal transmitter is operated by the restoration of the failure notification relay ER to transmit the emergency stop signal to the train.

[0010]

Operation: After the train 2 enters the alarm section of the railroad crossing 3 and the railroad crossing alarm AR starts alarming, the obstacle detector starts the detection operation. When the obstacle detector detects an obstacle in the railroad crossing 3 before the entrance side blocking rod of the railroad crossing barrier is completely lowered, the light receiving relay RRn is restored, and when the relay RPS1R is operating, the control unit CLn operates. Select the T1 time setting device,
As a result, the relay TRn is restored after the lapse of T1 and the trouble notification relay ER is restored, and the emergency stop signal transmitter operates by the restoration of the trouble notification relay ER to issue the emergency stop signal to the train. On the other hand, the obstacle detector detects an obstacle inside the railroad crossing after the entrance side blocking rod of the railroad crossing breaker starts to descend, and the light receiving relay RRn is restored, and the relay RP
When the SlR is restored, the control unit CLn selects the T2 time setting device, which causes the relay TR
n is restored, the trouble notification relay ER is restored,
The emergency stop signal transmitter operates by the restoration of the trouble notification relay ER to issue an emergency stop signal to the train.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a control relay circuit according to an embodiment of the present invention by enclosing it with a dotted line. In order to eliminate the problems of the conventional device, the entrance side disconnection rod of the railroad crossing breaker has been lowered. Before and after, the recovery time of the relay ER is switched to two levels. 11 is a control relay circuit, C
L1, CL2, CL3 are control units, TR1, TR2, TR
Reference numeral 3 is a light receiving reaction relay operated by the outputs of the control units CL1, CL2, CL3, and TM is a timer for setting the delay operation time of the alarm control relay R that is activated when the train 2 enters the alarm section and then recovers and moves out of the alarm section. , RPS1R is a relay that recovers after the time set by the timer TM, and this time is arbitrarily set by the T0 setter. Normally, the time from when the railroad crossing alarm AR starts to alarm until the railroad crossing breaker 4 completes the descent is set. In addition, this relay RPSl
The alarm control relay R is activated, and the alarm R is activated immediately when the railroad crossing alarm AR is stopped.

When the train 2 enters the alarm section, the relay ER is de-energized through the operation contact of the alarm control relay R, but the light receiving relay R of the light receivers R1, R2 and R3 is cut off.
Light receiving reaction relays TR1, TR of R1, RR2, RR3
2, energized through the operating contacts of TR3 to maintain operation. At this time, if there is an obstacle such as a car on the railroad crossing 3,
One of the light reception reaction relays TR1, TR2, TR3 is restored, and the relay ER becomes the control units CL1, CL2, CL3.
After the time set by the T1 time setting device or the T2 time setting device selected in step 3, the special signal light emitting device 9 issues an emergency stop signal to the train 3.

FIG. 2 shows the control units CL1, CL2, CL of FIG.
3 shows an electrical connection relationship of No. 3. Controller CL
Light receiving reaction relay TRn (TR1, TR2, TR3) connected to the output terminal B of n (CL1, CL2, CL3)
Is a light receiving relay RRn (RR
1, RR2, RR3) operates immediately when positive power is supplied via the operation contacts, and when relay RRn is restored and the positive power supply to input terminal A is cut off, T1 time setting device or T2 time setting Restores after the time set by the container. In this case, when the relay RPS1R is operating, positive power is supplied to the control input terminal C of the control unit CLn via the operating contact, so that the relay TRn is T
It recovers after the time set by the 1-hour setting device has elapsed. When the relay RPS1R is restored, the control unit CL
Since the positive power source is not input to the control input terminal C of n, the relay TRn is restored after the time set by the T2 time setter has elapsed.

FIGS. 3A and 3B are time charts showing the above operation. In (A), when the relay RPS1R is operating, positive power is supplied to the control input terminal C of the control unit CLn through the operating contact, so that the relay TRn
Shows an example of recovering after the time set by the T1 time setting device has elapsed. (B) shows an example in which when the relay RPS1R is restored, the positive power is not supplied to the control input terminal C of the control unit CLn, and the relay TRn is restored after the time set by the T2 time setter has elapsed. As shown in FIGS. 2A and 2B, the control unit CLn shown in FIG. 2 has two modes depending on whether or not the positive power supply is supplied to the control input terminal C, that is, the recovery time of the relay TRn is T1 time and T2 time. To work.

4 and 5 are overall operation time charts. As shown in FIG. 4, when the train 2 enters the alarm section of the railroad crossing 3 and the alarm control relay R is restored, the relay RPSlR is restored after the time set by the T0 setter of the timer TM that sets the delay operation time elapses. . This set time is
This is the time from when the railroad crossing alarm device AR starts to warn until the railroad crossing barrier rod 4a on the approach side of the railroad crossing barrier device 4 is completely lowered. Until the relay RPS1R is restored, the control units CL1, CL2, through the operating contacts of the relay RPS1R.
Since the positive power is supplied to the input terminal C of CL3, when the light receiving relays RR1, RR2 and RR3 are restored, the relay TR1, after the time set by the T1 time setter has elapsed.
TR2 and TR3 are restored. During this time, there is an obstacle at the railroad crossing 3 and the light beam is blocked, and the light receiving relays RR1, RR2, RR3 of the light receiving devices R1, R2, R3, for example, the light receiving relay RR.
When 1 is restored, the light reception reaction relay TR1 connected to the output terminal B of the control unit CL1 is restored after T1 time. This T
One hour is typically set to 5 to 6 seconds, as described above.

[0016] As described above, while the railroad crossing barrier 4a on the approach side of the railroad crossing barrier 4 is not completely lowered, that is, immediately before the pedestrian who crosses the railroad crossing 3 immediately before the railroad crossing alarm AR starts warning. Light-blocking relay RR1,
Even if RR2 and RR3 repeat operation and restoration, the trouble notification relay ER is not restored. Therefore, train 2 is unnecessary
However, it is possible to reduce the chances that the special signal light emitting device 9 issues the emergency stop signal. In addition, the special signal light emitting device 9 is operated by the train 2 after the time T1 when it is blocked by an actual obstacle.
On the other hand, when the emergency stop signal is issued, the train 2 has just passed the warning start point A because the railroad crossing warning device AR has just started to warn during this time, so a sufficient braking distance is secured. It is possible to stop before approaching the railroad crossing 3.

On the other hand, after the relay RPS1R is restored, that is, after the shut-off rod 4a on the approach side of the railroad crossing breaker 4 is completely lowered, the operation contact of the relay RPS1R is opened, so that the control inputs of the control units CL1, CL2, CL3 are input. Positive power is no longer supplied to terminal C, and light receiving relays RR1 and RR
When 2 and RR3 are restored, the relays TR1, TR2 and TR3 are restored after the time set by the T2 time setter has elapsed. During this time, there is an obstacle at the railroad crossing 3 and the light beam is blocked, and the light receiving relays RR1 and RR of the light receiving devices R1, R2 and R3.
2, RR3, for example, when the light receiving relay RR1 is restored, the light receiving reaction relay TR connected to the output terminal B of the control unit CL1
1 recovers after T2 hours. This T2 time needs to be detected immediately because the railroad crossing rod 4a on the approach side of the railroad crossing gate 4 is an obstacle existing after the completion of the descent, and is usually set to about 1 second.

As described above, the train 2 is relatively close to the railroad crossing 3 when the railroad crossing barrier 4a on the approach side of the railroad crossing barrier 4 is blocked by an actual obstacle after the descent is completed. The special signal light emitter 9 can issue an emergency stop signal to the train 3 with a short delay time of T2 time, and it is possible to secure the braking distance and stop before approaching the railroad crossing 3 as described above. Becomes

[0019]

According to the present invention, since the train is constructed as described above, a warning is issued at the railroad crossing before the train enters the alarm section of the railroad crossing and the lowering of the railroad crossing rod on the entry side of the railroad crossing barrier is completed. Even if the pedestrian who entered the railroad crossing just before exits, the light beam is momentarily interrupted, and even if the light receiving relay repeats operation and restoration, it is possible to reduce the chances of issuing an emergency stop signal, depending on the actual obstacle. When the light beam is interrupted and an emergency stop signal is issued to the train, a sufficient braking distance can be secured and the train can be stopped before approaching the railroad crossing.
Also, if the railroad crossing barrier on the approach side of the railroad crossing machine has completed the descent, and the railroad crossing barrier on the exit side is blocked by an actual obstacle after the descent has started, the train will be relatively close to the railroad crossing. However, it is possible to issue an emergency stop signal to the train with a short delay time, and it is possible to secure a braking distance and stop before approaching a railroad crossing as in the above. Furthermore, it is possible to eliminate the contradictory drawbacks of the railroad crossing barrier on the approach side of the railroad crossing machine before and after the descent is completed, and when installing a new railroad crossing obstacle detection device, move the railroad crossing alarm start point far away. It is possible to secure the braking distance of the train without any trouble, and it is extremely safe and does not lengthen the warning time for railroad crossings. Passenger cars waiting for the passage of the train feel frustrated and make the railroad crossing open. It can be expected to have an excellent effect that it will not be increased.

[Brief description of drawings]

FIG. 1 is a diagram showing a control relay circuit according to an embodiment of the present invention.

FIG. 2 is a diagram showing a connection relationship of control units CLn.

3A and 3B are time charts for explaining the operation.

[Fig. 4] Fig. 4 is an example of an overall operation time chart in which an obstacle has been detected before the railroad crossing barrier on the approach side of the railroad crossing barrier has been lowered, and an emergency stop signal has been issued to the train after T1 hours. It is shown.

[Fig. 5] Fig. 5 is an example of an overall operation time chart in which an obstacle is detected after the railroad crossing rod on the advancing side of the railroad crossing gate has started to descend, and an emergency stop signal is issued to the train after T2 hours. Is shown.

FIG. 6 is a schematic plan view and an operation time chart showing a position of a train and a state of an alarm operation with respect to a railroad crossing in a conventional railroad crossing control device taking a one-sided line of a double-track section as an example.

FIG. 7 is a diagram showing an installation example of a level crossing obstacle detection device including a light emitter and a light receiver.

FIG. 8 is a drawing showing an example of electrical connection between a light emitter and a light receiver.

FIG. 9 is a diagram showing an example of a control relay circuit using a conventional relay contact network.

FIG. 10 is an operation time chart of a conventional railroad crossing control device, showing an example in which an obstacle is detected before the entrance side blocking rod of the railroad crossing barrier is completely lowered and an emergency stop signal is issued to the train. Is.

FIG. 11 is also an operation time chart of a conventional railroad crossing control device, showing an example in which an obstacle is detected after the entry side blocking rod of the railroad crossing barrier is lowered and an emergency stop signal is issued to the train. Is.

[Explanation of symbols]

1 Rail 2 Train 3 Railroad crossing 4 Railroad crossing breaker 4a Railroad crossing rail 4b on approach side Railroad rail crossing barrier on exit side 5, 6 Train detector 9 Special signal emitter (emergency stop signal transmitter) 11 Control relay circuit A Alarm start point B alarm end point APR reaction relay BPR reaction relay R alarm control relay ER obstacle notification relay (slow release relay) AR crossing alarm TM timer RPS1R relay CL1, CL2, CL3 (CLn) control unit TR1, TR2, TR3 (TRn) light reception Reaction relay S1, S2, S3 (Sn) light emitter R1, R2, R3 (Rn) light receiver

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Okuda 2-4-24 Shibata, Kita-ku, Osaka City, Osaka Prefecture West Japan Railway Company (72) Inventor, Isamu Suzuki 2-20, Nakaike, Ota-ku, Tokyo No. 2 Daido Signal Co., Ltd. (72) Inventor Masaharu Kono 2-20-2 Nakaikeue, Ota-ku, Tokyo Daido Signal Co., Ltd.

Claims (1)

[Claims] 1. A railroad crossing alarm device AR that issues a warning when a train is present in an alarm section, and whether or not there is an obstacle such as a person or a car at the railroad crossing from the start to the end of the warning. A crossing obstacle detector composed of a plurality of sets of light emitters Sn and light receivers Rn, and two sets of an entrance-side blocking rod and an advancing-side blocking rod are arranged across the railroad crossing, and a crossing alarm AR is provided. After the lapse of a predetermined time from the start of the alarm, the entry side shutoff rod will start to descend, and the approach side shutoff rod will start descending as soon as the approach side shutoff rod completes the descent, and an emergency stop signal to the train will be sent. Equipped with an emergency stop signal transmitter for transmitting and a control relay circuit, which are connected to the light receivers Rn of the level crossing obstacle detector, respectively, and operate without interruption of the light beam unless there is an obstacle at the level crossing. And step on A level crossing control device provided with a light receiving relay RRn that is restored by shutting off any of the light rays when an obstacle is present, and an obstacle notification relay ER that is restored after a lapse of a predetermined time when any of the light receiving relays RRn is restored. In the control relay circuit, there is further provided a timer TM for setting the time from the alarm start of the railroad crossing warning device AR to the completion of the descent of the approach side blocking rod, and a relay RPS for recovering after the time set by the timer TM.
1R and a light receiving relay RRn are restored, the trouble notification relay ER is restored to a time T1 time setter that sets a time T1 and a T2 time setter that sets a time T2 shorter than the time T1. The terminal A is connected to the operating contacts of the light receiving relay RRn, and the control input terminal C
Are connected to the operation contacts of the relay RPS1R respectively, and if the light receiving relay RRn is restored before the entry side blocking rod of the railroad crossing gate is completely lowered, and the relay RPS1R is operating, the T1 time setter is selected and the railroad crossing is blocked. When the light receiving relay RRn is restored after the start of lowering of the shutoff rod on the advancing side of the machine and the relay RPS1R is restored, the control unit CLn that controls to select the T2 time setting device and the output terminal B of the control unit CLn are connected. After the connection, the control unit is restored, and after T1 time set by the T1 time setting device or T2.
Relay T that recovers after T2 hours set by the time setting device
Rn is provided, and the trouble notification relay ER is restored by the restoration of the relay TRn, and the emergency stop signal transmitter is activated by the restoration of the trouble notification relay ER to send the emergency stop signal to the train. Level crossing control device characterized by being.