JP3346499B2 - Railroad crossing control device - Google Patents

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,
More specifically, a plurality of level crossing warning sections with different distances are provided behind the track on the track as viewed from the level crossing, and when there is a preceding train in the section ahead of the path adjacent to the level crossing warning section, A railroad crossing control signal is output based on the train detection signal, and when there is no preceding train in the section ahead of the route adjacent to the railroad crossing warning section, a railroad crossing control signal is output based on the train detection signal in the long railroad crossing warning section. Like so
The present invention relates to a technique for shortening a railroad crossing control time (hereinafter, referred to as a “railroad crossing warning time”).

[0002]

2. Description of the Related Art A conventional railroad crossing control device is provided with an alarm start point in front of a railroad crossing and an alarm end point in front of the railroad crossing, and a warning is provided until the train enters the alarm start point and then exits the alarm end point. Etc. are output. Such a railroad crossing control device is called "Signal" (by Hiroshi Yoshimura and Saburo Yoshikoshi, published by Koyusha)
Electricity and Signal Series No.
6 "Trail crossing safety device" (issued by Japan Railway Electrical Engineering Association). A railway crossing fixed time control device that optimizes the railway crossing warning time is disclosed in Japanese Patent Application Laid-Open No. 3-57769.

[0003]

However, the conventional railroad crossing control device has the following problems. (A) Since the railroad crossing control signal is output from the time when the train enters the alarm start point until the time when the train advances to the alarm end point, the railroad crossing warning time differs depending on the traveling speed of the train in the railroad crossing warning section. In particular, at a railroad crossing near the station, the running speed of the following train is limited due to the relation with the preceding train, the crossing warning time for the succeeding train is lengthened, and the crossing is not opened, resulting in traffic congestion. . (B) When the train crosses at a high speed at the railroad crossing fixed time control in which the arrival time of the train at the railroad crossing road is predicted from the traveling speed when the train enters the warning start point and the output of the railroad crossing control signal is delayed. Is effective because the warning time for railroad crossing is shortened. However, the railroad crossing control device near the station, when the preceding train is stopped at the station, because the subsequent train stops or decelerates just before the railroad crossing, the train position can not be determined only by the delay time, Only the delay time of the railroad crossing warning is shortened by the delay time, and the railroad crossing warning time still remains long.

An object of the present invention is to provide a railroad crossing control device capable of controlling a railroad crossing warning time in relation to a preceding train.

[0005]

In order to solve the above-mentioned problems, a railroad crossing control device according to the present invention includes a railroad crossing warning section, a train detection circuit, and a control circuit. Two first level crossing warning sections and a second level crossing warning section are provided at a common end point, including the level crossing, at the rear of the track as viewed from the level crossing, and
Is longer than the second crossing warning section, the train detection circuit is provided at least two,
A first train detection circuit and a second train detection circuit
Detecting the presence / absence of a train in the railroad crossing warning section and the second railroad crossing warning section, respectively, and outputting a first train detection signal and a second train detection signal. When a signal and preceding train information for notifying the position of the preceding train are input and the preceding train information is “no preceding train in a section ahead of the route adjacent to the railroad crossing warning section,” the first train detection signal And outputs the level crossing control signal based on the second train detection signal when the preceding train information is “there is a preceding train in a section ahead of the track adjacent to the level crossing warning section”. It outputs a signal.

[0006]

At least two railroad crossing warning sections are provided, and the first railroad crossing warning section and the second railroad crossing warning section have a common end point and are provided behind the track on the track as seen from the railroad crossing including the railroad crossing, The first railroad crossing warning section is longer than the second railroad crossing warning section, at least two train detection circuits are provided, and the first train detection circuit and the second train detection circuit are connected to the first railroad crossing warning section. The presence or absence of a train in the warning section and the second level crossing warning section is separately detected, and the first train detection signal and the second
Since the control circuit outputs the first train detection signal in the long first railroad crossing warning section when the running speed of the train is high, the control circuit outputs By using the second train detection signal in the second railroad crossing warning section where the distance is short, it is possible to output an appropriate railroad crossing control signal according to the running speed of the train.

The control circuit includes a first train detection circuit and a second train detection circuit.
The running position of the train can be determined by determining the train detection signal of the train detection circuit. For example, when the first train detection signal and the second train detection signal are both “no train”, the train is outside the first railroad crossing warning section, and the first train detection signal is “train present”. When the second train detection signal is "no train", the train is located between the first railroad crossing warning section and the second railroad crossing warning section, and the first train detection signal and the second train detection signal are If both have "train", it is understood that the train is within the second level crossing warning section. For this reason, when the train enters the second level crossing warning section, the control circuit sets the level crossing control signal S
2 from the first level crossing warning section to the second level
A railroad crossing control signal can be output without being affected by the running speed of the train up to the railroad crossing warning section.

When the preceding train information indicates that there is no preceding train in the section ahead of the route adjacent to the level crossing warning section, the control circuit outputs a level crossing control signal based on the first train detection signal. The relevant train (subsequent train) in relation to
If the traveling speed of the train is not limited, a railroad crossing control signal is output from when the subsequent train enters the long first railroad crossing warning section. Thereby, a level crossing warning time suitable for high-speed traveling can be obtained. When the preceding train information is “the preceding train is present in the section ahead of the route adjacent to the railroad crossing warning section”, a level crossing control signal is output based on the second train detection signal. When the traveling speed is limited, the level crossing control signal is not output until the following train enters the short-distance second level crossing warning section, so that the level crossing warning time can be shortened. Thereby, a railroad crossing control device capable of controlling the railroad crossing warning time in relation to the preceding train is obtained.

[0009]

FIG. 1 is a block diagram showing the structure of a railroad crossing control device according to the present invention. The railroad crossing control device is a railroad crossing warning section L
And a train detection circuit 1 and a control circuit 2, and outputs a railroad crossing control signal S2 to the railroad crossing alarm 3 or the railroad crossing breaker 4. Reference numeral 5 is a railroad crossing, 6 is a track, 7 is a train, and 8 is a platform of a station. 71 is a preceding train and 72 is a succeeding train.

At least two level crossing warning sections L are provided. The first level crossing warning section L1 and the second level crossing warning section L2 share the end point P2 and are provided behind the path of the track 6 including the level crossing 5, including the level crossing 5. First
Is longer than the second level crossing warning section L2. The first railroad crossing warning section L1 has a starting point P1
However, in consideration of the maximum speed when the speed of the succeeding train 72 is not limited in relation to the preceding train 71, a distance is set from the level crossing 5 such that a certain level-crossing warning time can be secured for the succeeding train 72. It is provided. Second level crossing warning section L
Similarly, the starting point P3 takes into consideration the traveling speed when the speed of the succeeding train 72 is limited in relation to the preceding train 71,
A distance is provided from the railroad crossing 5 such that a certain level crossing warning time can be secured for the following train 72.

[0011] At least two train detection circuits 1 are provided. The first train detection circuit 11 detects the presence or absence of the train 7 in the first railroad crossing warning section L1, and outputs a first train detection signal S11. The second train detection circuit 12
, Detects the presence or absence of the train 7 in the railroad crossing warning section L2, and outputs a second train detection signal S12. First train detection circuit 1
1 only needs to be able to detect that the train 7 has entered the first level crossing warning section L1 and that the train 7 has advanced from the first level crossing warning section L1, and it can be either a point detection type or a continuous detection type. Good. The first train detection circuit 11 of the point detection type, which is the same as the second train detection circuit 12,
At the start point P1 of the first level crossing warning section L1, a level crossing controller 111 for detecting the entry of the train 7 is provided, and at the end point P2 of the first level crossing warning section L1, a level crossing controller 110 for detecting the advance of the train 7 is provided. It is composed. A period from when the railroad crossing controller 111 detects the train 7 to when the railroad crossing controller 110 detects the train 7 is the first train detection signal S11 of the train “Yes”. The railroad crossing controller is described in detail in the aforementioned “Signal”.

Similarly, the second train detection circuit 12
Is provided with a railroad crossing controller 121 that detects the entry of the train 7 at the start point P3 of the railroad crossing warning section L2, and a railroad crossing controller 110 that detects the advance of the train 7 at the end point P2 of the railroad crossing warning section L2. . A period from when the railroad crossing controller 121 detects the train 7 to when the railroad crossing controller 110 detects the train 7 is the second train detection signal S12 of the train “Yes”.

An axle detector for detecting the axle of a train may be used in place of the railroad crossing controller. The axle detector is described in detail in Japanese Patent Application Laid-Open No. 3-57769.

The first train detection circuit of the continuous detection type, for example, puts on a loop coil (not shown) over the entire area of the first railroad crossing warning section L1 and detects a train by the presence or absence of a transmission signal transmitted from the train 7. Is performed. As shown, the track 6 includes a plurality of track circuits (1T, 2T,
T, 2T downstream), each track circuit individually performs train detection, and the track relay (1TR, 2TR
TR, 1TR down, 2TR down) are "fall" (contact open in non-excitation state) and "lifting" (contact conduction in excitation state). Accordingly, the start point P1 and the end point P2 are connected to the track circuit (1
When it coincides with the blockage boundary of T to 1T, the first train detection circuit 11 may be configured by the logic (AND logic) of the contacts of the track relays (1TR, 2TR, 1TR).
Track relay (1TR, 2TR, 1TR down, 2T down)
R) is well known to those skilled in the art and has been omitted from the drawings.

The control circuit 2 includes a first train detection signal S1
1. First and second train detection signals S12 and preceding train information S13 indicating the position of the preceding train 71 are input. When the preceding train information S13 is "no preceding train 71 in the section ahead (2T downhill) adjacent to the first railroad crossing warning section L1", the railroad crossing control signal S2 is output based on the first train detection signal S11. I do. The preceding train information S13 is "a section ahead of the route adjacent to the first level crossing warning section L1 (downward 2T).
, The railroad crossing control signal S2 is output based on the second train detection signal S12.

As described above, the first level crossing warning section L1
And the second level crossing warning section L2 is provided behind the path of the track 6 as viewed from the level crossing 5 including the level crossing 5 with the end point P2 common, and the first level crossing warning section L1 is set to the second level crossing warning section L
2, the first train detection circuit 11 and the second train detection circuit 12 separately detect the presence or absence of the train 7 in the first railroad crossing warning section L1 and the second railroad crossing warning section L2. The control circuit 2 outputs the first train detection signal S11 and the second train detection signal S12 when the traveling speed of the train 7 is high. When the traveling speed of the train 7 is low, the first train detection signal S11 is set to the second level crossing warning section L2 within a short distance.
By using the second train detection signal S12, an appropriate level crossing control signal corresponding to the traveling speed of the train 7 can be output.

The control circuit 2 has a first train detection signal S11
And the second train detection signal S12,
The traveling position of the train 7 can be determined. For example, when the first train detection signal S11 and the second train detection signal S12 are both “no train”, the train 7 is outside the first railroad crossing warning section L1, and the first train detection signal S11 is "With train" and
When the second train detection signal S12 is “no train”, the train 7 is connected to the first railroad crossing warning section L1 and the second railroad crossing warning section L2.
When the first train detection signal S11 and the second train detection signal S12 are both "train present", it is understood that the train 7 is in the second railroad crossing warning section L2. For this reason, even if the train 7 runs slowly, the control circuit 2 can output the level crossing control signal S2 when the train 7 enters the second level crossing warning section L2, and can output the first level crossing warning section L
The railroad crossing control signal S2 can be output without being affected by the running speed of the train 7 from the first to the second railroad crossing warning section L2.

When the preceding train information S13 is "the preceding train 71 is not present in the section ahead of the course (downward 2T) adjacent to the first railroad crossing warning section L1", the control circuit 2 outputs the first train detection signal S11. When the running speed of the succeeding train 72 is not limited in relation to the preceding train 71, the succeeding train 72 has the longer distance.
From the crossing warning section L1 of the railroad crossing control signal S
2 is output. Thereby, a level crossing warning time suitable for high-speed traveling can be obtained. When the preceding train information S13 is “the preceding train 71 is present in the section ahead of the route (downward 2T) adjacent to the first railroad crossing warning section L1,” the railroad crossing control signal S2 is output based on the second train detection signal S12. Therefore, when the traveling speed of the succeeding train 72 is limited in relation to the preceding train 71, the railroad crossing control signal S2 is not output until the subsequent train 72 enters the short-distance second railroad crossing warning section L2. The warning time for railroad crossing can be shortened. Thereby, a railroad crossing control device capable of controlling the railroad crossing warning time in relation to the preceding train 71 is obtained.

FIG. 2 is a timing chart showing an operation image of the railroad crossing control device. In the drawing, the same reference numerals as those in FIG. 1 indicate identical components. FIG. 2 will be briefly described based on the above operation.

The state (a) shows a case where the following train 72 enters the first railroad crossing warning section L1 when the preceding train 71 is on the section (downward 2T). Control circuit 2
Indicates that the preceding train information S13 indicates that the preceding train 71 is located in a section ahead (downward 2T) adjacent to the second railroad crossing warning section L2.
Yes, and the second train detection signal S12 is
2 nothing ", the railroad crossing control signal S2 is not output. In this case, in the normal train control, the subsequent train 72 cannot enter the closed section (downward 1T) and must be stopped in the closed section 2T, so the train is decelerated.

State (b) shows a case where the following train 72 enters the second level crossing warning section L2 when the preceding train 71 is on the section (downward 2T). Control circuit 2
Indicates that the preceding train information S13 indicates that the preceding train 71 is located in a section ahead (downward 2T) adjacent to the second railroad crossing warning section L2.
Yes, and the second train detection signal S12 is
2 ", the railroad crossing control signal S2 is output.

State (c) shows a case where the following train 72 enters the first railroad crossing warning section L1 when the preceding train 71 is not on the section (downward 2T). Control circuit 2
Indicates that the preceding train information S13 indicates that “the preceding train 71 is located in a section (downstream 2T) ahead of the course adjacent to the first railroad crossing warning section L1.
No), and the first train detection signal S11 is
2 ", the railroad crossing control signal S2 is output. In this case, the subsequent train 72 is not decelerated, but runs at a predetermined running speed.

State (d) shows a case where the following train 72 enters the second railroad crossing warning section L2 when the preceding train 71 is not on the section (downward 2T). Control circuit 2
Indicates that the preceding train information S13 indicates that “the preceding train 71 is located in a section (downstream 2T) ahead of the course adjacent to the first railroad crossing warning section L1.
No), and the first train detection signal S11 is
2 ", the railroad crossing control signal S2 is output.

In the control circuit 2 of the embodiment, the preceding train information S13 is given by the indication of a traffic signal 81 provided behind the track 6 when viewed from the level crossing 5. Traffic light 81
Is a blockage signal of a track circuit (downward 1T),
When the preceding train 71 is on the track circuit (down 2T), "red" is shown, and the preceding train 71 is in the track circuit (down 2T).
Shows "yellow" when you advance from. “Blue” is shown when the preceding train 71 has advanced into the section ahead of the track circuit (downward 2T). For this reason, the preceding train information S indicating that the “red” indication of the traffic light 81 indicates that “the preceding train 71 is present in the section ahead of the course (downward 2T) adjacent to the second level crossing warning section L2”.
13 and the change of the signal 81 from the “red” indication to the “yellow” indication indicates that the preceding train information indicates that “the preceding train 71 is not present in the section (downstream 2T) in front of the route adjacent to the first level crossing warning section L1”. It becomes S13.

The traffic light 82 is a blockage traffic light of the track circuit 2T, and in the third display section, when the traffic light 81 is "red", the signal is "yellow". The traffic signal 83 is the track circuit 1
When the traffic light 81 is "red", the signal is "blue". Traffic light 84 is a departure traffic light. The traffic light 81 is linked with the traffic light 84.

The start point P1 of the first railroad crossing warning section L1 is provided behind the traffic signal 81 at a distance from the traffic light 81 with a braking distance L11 of the train 7 at a running speed corresponding to the present signal of the traffic light 81. The braking distance L11 is determined by applying a brake when the train 7 is running at the running speed indicated by “blue”,
It is set so that it can be stopped in front of. Similarly, the start point P3 of the second railroad crossing warning section L2 is provided behind the traffic light 81 at a distance from the traffic light 81 with a braking distance L21 of the train 7 at a running speed according to the present signal of the traffic light 81. The braking distance L <b> 21 is set so that the brake can be applied when the train 7 is running at the running speed indicated by “yellow” and stopped before the traffic light 81. The starting point P3 is inside the closed section 2T. For this reason, when the preceding train 71 is not on the section (downward 2T) and the following train 72 is running at the running speed indicated by “blue”, the level crossing control is performed from the time when the following train 72 enters the starting point P1. The signal S2 is output. Immediately before the succeeding train 72 enters the starting point P1, the traffic light 8
The "blue" indication of 2 is canceled, and the indication of the traffic light 82 is "yellow".
Traffic light 8 even if it is changed to a present or “red” present
You can stop just before one.

When the preceding train 71 is on the section (downward 2T) and the following train 72 enters the starting point P1 at the running speed indicated by "Yellow", the railroad crossing control signal S2 is not output at the starting point P1, and The railroad crossing control signal S2 is output from when the train 72 enters the starting point P3. In addition, even if the “yellow” indication of the traffic light 82 is canceled immediately before the subsequent train 72 enters the starting point P3 and the indication of the traffic light 82 is changed to “red” indication, it can be stopped just before the traffic light 81. . Therefore, safety in train operation is also ensured.

Further, the control circuit 2 of the embodiment is configured to provide a “section ahead of the course (downward 2T) adjacent to the second level crossing warning section L2”.
, The preceding train 71 is provided when the preceding train 71 advances from the first railroad crossing warning section L1. For this reason, the railroad crossing control device in the vicinity of the station indicates that the preceding train 71 has advanced into the first railroad crossing warning section L1 (downhill 2).
After entering T), a level crossing control signal S2 is output based on the second level crossing warning section L2. Therefore, the following train 72
Does not output the level crossing control signal S2 until the vehicle enters the starting point P3 even when the vehicle enters the starting point P1, and can minimize the level crossing warning time while ensuring safety in train operation.

FIG. 3 is a block diagram showing the configuration of another embodiment of the railroad crossing control device according to the present invention, and FIG. 4 is a specific circuit diagram of the control circuit 2 as a component thereof. In the figure, the same reference numerals as FIG. 1 shows like parts and components. In the present embodiment, the first train detection circuit 11 uses the track relay (1TR, 2T, 1T, 2T, down 1T).
R, downlink 1TR). When the train 7 is on the track circuit 1T, the track relay 1TR is in a non-excited state, and the contact 1TR1 falls (disconnects). Similarly, when the train 7 is on the track circuit 2T, the contact 2TR1 falls and the track relay 2TR drops.
When the train 7 is on the track circuit (1TR down), the contact point (1TR1 down) falls. For this reason, as shown in FIG. 4, when the contacts 1TR1, 2TR1 and the downstream 1TR1 are connected in series to form an AND connection circuit, when the train 7 is on any of the track circuits (1T, 2T, downstream 1T), The first train detection signal S11 that the AND connection circuit becomes “disconnected” and the train becomes “present” is configured. When the train 7 does not exist in any of the track circuits (1T, 2T, down 1T), the AND connection circuit becomes “conducting”, and the first train detection signal S11 becomes “absent”.

The traffic light 81 indicates "red" when the preceding train 71 is on the track circuit (downhill 2T), and indicates "yellow" when the preceding train 71 advances from the track circuit (downhill 2T). I do. That is, the preceding train information S indicating that the “red” indication of the traffic light 81 indicates that “the preceding train 71 is present in the section ahead of the route (downward 2T) adjacent to the second level crossing warning section L2”.
13 and the change of the signal 81 from the “red” indication to the “yellow” indication indicates that the preceding train information indicates that “the preceding train 71 is not present in the section (downstream 2T) in front of the route adjacent to the first level crossing warning section L1”. It becomes S13.

The second train detection circuit 12 includes a control relay S
Includes TPR. The control relay STPR indicates that the preceding train information S13 indicates that “the preceding train 71 is present in the section (downstream 2T)”,
Further, when the subsequent train 72 enters the second level crossing warning section L2, it "falls" and the contact point STPR1 becomes non-conductive.
Otherwise, it "lifts" and the contact point STPR1 conducts. Information on whether or not the subsequent train 72 is on the second level crossing warning section L2 is provided by a track relay (2TR, 1TR down).
Obtained by the AND connection circuit of the contacts.

The control circuit 2 includes a relay XR.
The relay XR has contacts (1TR1, 2TR1, down 1TR)
It is connected in series to a parallel circuit of the AND connection circuit according to 1) and the contact point STPR1. Relay XR is "fall"
Then, a contact (not shown) becomes “disconnected”, and outputs a railroad crossing control signal S2 that sounds the railroad crossing alarm 3 and lowers the railroad crossing breaker 4.

The relay XR falls when the preceding train information S13 indicates “No preceding train 71 in the section (down 2T)” when the following train 72 enters the closed section 1T, and falls in the first level crossing warning section L1. A railroad crossing control signal S2 is output according to the presence or absence of the following train 72.

When the preceding train information S13 indicates that "the preceding train 71 is present in the section (down 2T)", the relay XR performs "lifting" until the succeeding train 72 enters the second level crossing warning section L2 by the control relay STPR. Then, when the following train 72 enters the second railroad crossing warning section L2, it "falls". Therefore, the same operation and effect as those of the embodiment shown in FIG. 1 can be obtained, and a railroad crossing control device capable of controlling the railroad crossing warning time in relation to the preceding train 71 can be obtained.

The control circuit 2 operates as follows: "First level crossing warning section L1
Preceding train 71 in the section ahead of the course (down 2T) adjacent to
The preceding train information S13 of “No” is the first train information of the preceding train 71.
Is given when a predetermined time T1 has elapsed after the vehicle has advanced through the railroad crossing warning section L1. During the fixed time T1, the preceding train 71
, The preceding train 71 stops at the station 8, the preceding train 71 departs from the station 8, and takes into consideration a predetermined series of operation times until the preceding train advances to the section in front of the station. Is set. Specifically, the control relay STPR is configured to “fall” after a certain time T1 has elapsed.

Information that "the preceding train 71 has advanced from the first level crossing warning section L1" is given, for example, by a change from "fall" to "lifting" of the track relay (downward 1TR). As a result, the control circuit 2 controls the preceding train 71
Has entered the section (downward 2T), the second level crossing control section L2 can be switched to the first level crossing control section L1.

The control circuit 2 determines that the contact point STPR1 is
Since they are connected in parallel to the AND connection circuit of R1, 2TR1, and downstream 1TR, a double system is configured for the relay XR, and the reliability is high.

The control circuit 2 determines that the preceding train 71
When the vehicle has advanced into the railroad crossing warning section L1, a railroad crossing control signal S2 is output based on the second train detection signal S12. When another predetermined time T2 has elapsed from when the preceding train 71 has advanced into the first railroad crossing warning section L1, a railroad crossing control signal S2 can be output based on the first train detection signal S11. FIG. 5 is a timing chart showing the operation of the control circuit. In the figure, S21 indicates a level crossing signal indicating that the preceding train 71 has exited the first level crossing warning section L1, and S22 indicates the present state of the traffic light 81 when the preceding train 71 has advanced into the section (downward 2T). Present status signal,
S23 is a timer signal provided by the control relay STPR. The railroad crossing signal S21 is transmitted to the track circuit (1TR,
(2TR, 1TR down) is obtained by the AND connection circuit of the contact point of the track relay. The railroad crossing signal S21 and the present state signal S22 constitute preceding train information S13.

The control relay STPR outputs the level crossing signal S2.
1 to "lift" and "fall" after a certain time T2. The high level of the timer signal S23 indicates “within the timer time”. When the railroad crossing signal S21 is given, it is the case of "the preceding train 71 is present in the section (downhill 2T)". Therefore, the AND condition (“the preceding train 71 exists in the section (down 2T)” and the following train 7) for outputting the level crossing control signal S2 using the second level crossing warning section L2 is used.
2 enters the second level crossing warning section L2), it is only necessary to confirm that the subsequent train 72 has entered the second level crossing warning section L2.

The control relay STPR indicates that the subsequent train 72 enters the second level crossing warning section L2 and the second train detection signal S
When "12" is input, "fall". Relay XR
When the second train detection signal S12 is obtained during the fixed time T2, the vehicle "falls" and outputs a level crossing control signal S2 based on the second level crossing warning section L2. When the second train detection signal S12 is not obtained within the fixed time T2, the relay XR "falls" after the lapse of the fixed time T2. At this time, if the first train detection signal S11 is the train “Yes”, the train falls,
It outputs a level crossing control signal S2 based on the first level crossing warning section L1.

The fixed time T2 is a time obtained by subtracting the legally required level crossing warning minimum time T3 from the fixed time T1. For this reason, the subsequent train 72 starts at the start point P1 of the first level crossing warning section L1.
From the first train crossing warning section L2 to the start point P3, then the preceding train 71 enters the section (down 2T), and the legal train crossing warning minimum time T3 is secured even when the succeeding train 72 runs at an increased speed. Leveled crossing control becomes possible.

When the present status signal S22 changes from the "red" presentation to the "yellow" presentation earlier than the scheduled time, the level control signal S22 is changed based on the first level crossing warning section L1.
2 is output. Therefore, the control relay STPR
Falls when the first train detection signal S11 is input, and the contact point STPR1 becomes "non-conductive". Therefore, when the following train 72 is on the first level crossing warning section L1, the level crossing control signal S2 is output immediately in synchronization with the present state signal S22, and the legally required level crossing warning minimum time T3 can be secured. When the following train 72 is on the second level crossing warning section L2, there is no problem because the level crossing control signal S2 has already been output. Therefore, the safety of train operation can be ensured even when the railroad crossing warning section is shortened. This operation and effect can be obtained similarly in the previous embodiment.

[0043]

As described above, according to the present invention, it is possible to provide a railroad crossing control device capable of appropriately controlling a railroad crossing warning time in relation to a preceding train.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a railroad crossing control device according to the present invention.

FIG. 2 is a timing chart showing an operation image of the railroad crossing control device according to the present invention.

FIG. 3 is a block diagram showing a configuration of another embodiment of the railroad crossing control device according to the present invention.

FIG. 4 is a specific circuit diagram of a control circuit according to another embodiment.

FIG. 5 is a timing chart showing an operation of a control circuit according to another embodiment.

[Explanation of symbols]

 L Level crossing warning section L1 First level crossing warning section L2 Second level crossing warning section 1 Train detection circuit 11 First train detector 12 Second train detector 2 Control circuit 3 Level crossing alarm 4 Level crossing breaker 5 Level crossing 6 Track 7 Train 71 Preceding train 72 Subsequent train 8 Station 81-83 Traffic light S11 First train detection signal S12 Second train detection signal S13 Previous train information S2 Railroad crossing control signal

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-159869 (JP, A) JP-A-2-18159 (JP, A) JP-A-7-137635 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) B61L 29/28 B61L 29/22

Claims (7)

(57) [Claims] 1. A railroad crossing control device that includes a railroad crossing warning section, a train detection circuit, and a control circuit, and outputs a railroad crossing control signal to a railroad crossing alarm or a circuit breaker. A first railroad crossing warning section and a second railroad crossing warning section are provided at a rear end of a track as viewed from the railroad crossing including the railroad crossing path with a common end point, and the first railroad crossing warning section is a second railroad crossing warning section. A train crossing warning section, wherein at least two train detection circuits are provided, and a first train detection circuit and a second train detection circuit are connected to the first crossing warning section and the second crossing warning section. Detecting the presence / absence of a train in each of them, and outputting a first train detection signal and a second train detection signal, wherein the control circuit is configured to notify the train detection signal and a position of the preceding train by a preceding train. Information is entered and the preceding When the train information is “no preceding train in the section ahead of the track adjacent to the railroad crossing warning section,” the railroad crossing control signal is output based on the first train detection signal, and the preceding train information is “the railroad crossing A level crossing control device that outputs the level crossing control signal based on the second train detection signal when “there is a preceding train in a section ahead of the course adjacent to the warning section”. 2. The railroad crossing control device according to claim 1, wherein the control circuit is configured to provide the preceding train information by an indication of a traffic light provided behind the track when viewed from the railroad crossing. 3. The travel according to the signal of the traffic light provided from the traffic light provided at the starting point behind the track as viewed from the railroad crossing road, with each of the first railroad crossing warning section and the second railroad crossing warning section. 3. The railroad crossing control device according to claim 1, wherein the railroad crossing control device is provided on the rear side of the route with a braking distance of the train at a speed. 4. The control circuit, wherein the preceding train information that “the preceding train is present in a section ahead of the route adjacent to the level crossing warning section” is given by the advance of the preceding train from the level crossing warning section. The level crossing control device according to claim 1. 5. The control circuit according to claim 1, wherein the preceding train information that "there is no preceding train in a section ahead of the track adjacent to the said level crossing warning section" has passed a predetermined time after the preceding train has advanced from the level crossing warning section. The railroad crossing control device according to claim 4, wherein the railroad crossing control device is provided by: 6. The control circuit outputs the level crossing control signal based on the second train detection signal when the preceding train advances from the level crossing warning section, and the preceding train advances from the level crossing warning section. The railroad crossing control device according to claim 1, wherein the railroad crossing control signal is output based on the first train detection signal when another predetermined time has elapsed since then. 7. The railroad crossing control device according to claim 6, wherein the control circuit is set so as to hold the legal crossing warning minimum time for the another fixed time.