JP5669922B1 - Railroad crossing breaker - Google Patents

Abstract

The present invention provides a railroad crossing cutting machine that does not vibrate when the lifting / lowering operation of the cutting bar is stopped. While a motor power is supplied and a cam switch CS is not detected, a motor drive control unit 10 drives and controls a motor 3 according to a control input to raise or lower a cutoff rod. And according to the detection of the cam switch CS, the rotational speed of the motor 3 is gradually decelerated and stopped. On the other hand, the supply of motor power is stopped when the cam switch CS is detected and the motor 3 is not driven (dropping of the relay CR3). For this reason, even when the cutoff rod reaches the reference position and the cam switch CS detects, the supply of motor power is not immediately stopped, and the rotational speed of the motor 3 can be gradually reduced and stopped. . [Selection] Figure 1

Description

  The present invention relates to a railroad crossing breaker.

  For example, Patent Document 1 discloses a conventional railroad crossing breaker. FIG. 3 shows a control block diagram of the conventional railroad crossing breaker, and its operation will be briefly described.

  As shown in FIG. 3, the conventional railroad crossing breaker includes, as control relays, a relay CR <b> 1 for controlling the lifting / lowering of the blocking rod and a relay CR <b> 2 for controlling the motor 3 and the brake 5.

  When a control input for instructing the lowering operation is made, the relay CR1 is dropped and the operation contact (also referred to as the upper contact) CR1a is opened, so that an operation instruction signal for the lowering operation is input to the motor drive control unit 1000. Further, when the relay CR1 is dropped, the operation contact CR1b is opened, and the descending cam switch CS2 is made effective among the cam switches CS. The cam switch CS includes an ascending cam switch CS1 that detects that the cutoff rod has reached the ascending reference position, and a descending cam switch CS2 that detects that the blocking rod has reached the descending reference position. The ascending reference position and the descending reference position are set as an angle range, and can be changed by mechanically adjusting the cam switch CS.

  Now, the lowering cam switch CS2 is enabled, but at this point in time when the lowering operation starts, the lowering cam switch CS2 is OFF (not detected), so the relay CR2 drops. When the relay CR2 is dropped, the operation contact CR2b is opened and the brake 5 is released. A recovery contact (also referred to as a drop contact) CR2a is configured by dropping the relay CR2, and motor power is supplied to the motor drive control unit 1000. The motor drive control unit 1000 starts when a motor power is supplied, and drives the motor 3 in the downward direction according to the control input.

  When the cutoff rod reaches the lowered position, the descending cam switch CS2 is turned on (detected), and the relay CR2 is raised. The operation contact CR2b is formed by raising the relay CR2, and the brake 5 is operated. Further, the recovery contact CR2a is opened, the supply of the motor power to the motor drive control unit 1000 is stopped, and the drive of the motor 3 is stopped.

  On the other hand, when the control input for instructing the ascending operation is made, the relay CR1 is lifted and the operation contact CR1a is configured, so that the operation instruction signal for the ascending operation is input to the motor drive control unit 1000. Further, the rising cam switch CS1 is validated by raising the relay CR1, but at this point in time when the rising operation starts, the rising cam switch CS1 is OFF (not detected), so the relay CR2 drops. When the relay CR2 is dropped, the operation contact CR2b is opened and the brake 5 is released. Further, the recovery contact CR2a is configured by the drop of the relay CR2, and the motor power is supplied to the motor drive control unit 1000. The motor drive control unit 1000 is activated when motor power is supplied, and drives the motor 3 in the upward direction according to the control input.

  When the blocking rod reaches the ascending position, the ascending cam switch CS1 is turned on (detected) and the relay CR2 is raised. The operation contact CR2b is formed by raising the relay CR2, and the brake 5 is operated. Further, the recovery contact CR2a is opened, the supply of the motor power to the motor drive control unit 1000 is stopped, and the drive of the motor 3 is stopped.

JP 2003-170832 A

However, there are some problems with the conventional level crossing breaker.
First, there is a problem that the breaking rod vibrates when the lifting / lowering operation of the breaking rod is stopped. This is because the lifting / lowering operation of the cutting rod was stopped by stopping the supply of the motor power while driving the motor. The motor suddenly stopped, causing the vibration of the cut-off.

  Next, there is a problem that the blocking rod temporarily lowers at the start of the raising operation of the blocking rod. This is because the motor was driven behind the release of the brake. Specifically, the motor power supply is supplied, the motor drive control unit is activated, and the motor is driven, which causes a time lag.

  Next, there are problems that skill is required for adjusting the stop position of the blocking rod and that it takes time to open and close the dust cover. In order to adjust the stop position of the cutoff rod, it was necessary to adjust the cam switch protected by the dust cover. However, the adjustment of the cam switch itself is not easy, and it is necessary to take into account the time lag from the detection of the cam switch to the actual stop of the motor.

  The present invention has been devised in view of the above-described problems, and a first object of the present invention is to solve the problem that the breaking rod vibrates when the lifting / lowering operation of the breaking rod is stopped. Another object of the present invention is to solve the problem that the breaking rod is temporarily lowered at the start of the raising operation of the breaking rod and to easily adjust the stop position of the breaking rod.

The first invention for solving the above-described problems is
A motor (for example, motor 3 in FIG. 1) that moves the cutting rod up and down;
Detecting means (for example, the cam switch CS in FIG. 1) for detecting that the cutoff rod has reached a predetermined rising reference position during the raising operation and reaching a predetermined lowering reference position during the lowering operation;
While the motor power is supplied and the detection means is not detected, the motor is driven and controlled according to a control input instructing an ascending operation or a descending operation, and the rotational speed of the motor is gradually reduced according to the detection of the detection means. Drive control means (for example, the drive stop control unit 11 in FIG. 1) to be stopped,
Motor power supply control means (for example, recovery contact CR3a, relay CR2, recovery contact CR2a in FIG. 1) that stops the supply of the motor power when the detection means detects and the motor is not driven;
It is a railroad crossing breaker equipped with.

The second invention is
First brake operation control means (for example, operation contact CR2b in FIG. 1) for operating a brake for braking the breaking rod when the detection means detects and the motor is not driven;
Is a railroad crossing breaker according to the first aspect of the present invention.

The third invention is
When the control input is an instruction input for performing an ascending operation, and the motor is not driven, second brake operation control means (for example, the operation contact CR1c of FIG. , Restoration contact CR3b),
Is a railroad crossing breaker according to the first or second invention.

The fourth invention is:
The drive control means includes adjustment means (for example, the drive stop control unit 11 and the switch 17 in FIG. 1) that adjusts parameters related to deceleration of the motor in order to adjust the stop position of the blocking rod.
A railroad crossing breaker according to any one of the first to third aspects of the invention.

  According to the first aspect of the invention, the detecting means detects that the blocking rod has reached the ascending reference position during the ascending operation and has reached the descending reference position during the descending operation. While the detection means is not detected and the motor power is supplied, the drive control means drives and controls the motor according to the control input to raise or lower the cutoff rod. And according to the detection of a detection means, the rotational speed of a motor is gradually decelerated and stopped. On the other hand, the supply of motor power is stopped when the detection means detects and the motor is not driven. As a result, even when the cutoff rod reaches the ascending reference position or the descending reference position, the supply of motor power is not immediately stopped, and it is possible to gradually decelerate and stop the motor rotation speed. It is possible to suppress the vibration of the blocking rod when stopping.

  According to the second invention, when the detection means detects and the motor is not driven, the brake can be operated to brake the breaking rod. As a result, when the motor drive is stopped and the lifting / lowering operation is stopped, the breaking rod can be braked.

  According to the third aspect of the present invention, even when the control input for performing the ascending operation is made, when the motor is not driven, the brake for braking the breaking rod is activated. Therefore, the blocking rod does not temporarily drop at the start of the ascending operation.

  According to the fourth aspect of the present invention, it is possible to easily adjust the stop position of the blocking rod by adjusting the parameter relating to the deceleration for stopping the motor after the detection means detects it.

The figure which shows the control block of the railroad crossing breaker of this embodiment. The flowchart for demonstrating the flow of the adjustment process of this embodiment. The figure which shows the control block of the conventional level crossing cutoff machine.

  Hereinafter, an embodiment to which the present invention is applied will be described, but it is needless to say that embodiments to which the present invention can be applied are not limited to the following embodiments.

  FIG. 1 is a control block diagram of a railroad crossing breaker 1 according to the present embodiment. The same members / elements as those of the conventional level crossing blocker 100 shown in FIG. 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As with the conventional railroad crossing breaker 100, the railroad crossing breaker 1 drives the motor 3 in the upward or downward direction in accordance with a control input for executing either the lifting or lowering operation of the barrier rod. Further, the cam switch CS detects that the breaking rod has reached a predetermined reference position, stops driving the motor 3, and operates the brake 5 to hold the position of the breaking rod.

The level crossing machine 1 is different from the conventional level crossing machine 100 in the motor drive control unit 10 and the external relay circuit unit 20.
The motor drive control unit 10 includes a processor such as a CPU (Central Processing Unit) and an ASIC (Application Specific Integrated Circuit), a memory such as a RAM (Random Access Memory) and a ROM (Read Only Memory), and the like, and is stored in the memory. By executing the program, the power supply to the motor 3 is controlled to drive the motor 3. Moreover, it has the drive stop control part 11 as a function part implement | achieved by execution of the said program.

  The drive stop control unit 11 performs control to stop the driving of the motor 3 based on detection result signals from the cam switches CS (the ascending cam switch CS1 and the descending cam switch CS2). However, the stop control is performed by gradually reducing the rotational speed of the motor 3.

  The cam switches CS (the ascending cam switch CS1 and the descending cam switch CS2) detect that the cutoff rod has reached a predetermined ascending reference position during the ascending operation and detects that it has reached the prescribed descending reference position during the descending operation. It corresponds to the means and is the same as the conventional cam switch CS. However, the railroad crossing breaker 1 of the present embodiment can adjust the stop position of the cutting rod without adjusting the cam switch CS.

  The drive stop control unit 11 decelerates and stops the motor 3 when the detection result of the cam switch CS becomes H level indicating arrival detection, but the parameter relating to deceleration (hereinafter referred to as “adjustment parameter”) is adjusted. It is configured to be possible. As the adjustment parameter, a parameter capable of adjusting the stop position of the cutoff rod can be appropriately selected from the timing of starting deceleration, the deceleration time, the deceleration, and the like. In the present embodiment, the time from when the detection result of the cam switch CS becomes H level (detection) until the start of deceleration (delay time; time base) is used as an adjustment parameter, and the deceleration time and deceleration are constant. . By adjusting the delay time, the time from when the cam switch CS is detected until the motor 3 is actually stopped is changed, so that the stop position of the blocking rod can be adjusted.

  Specifically, simply by repeating the trial operation of the lowering or raising operation of the cutting rod and setting the delay time which is the value of the adjustment parameter (hereinafter referred to as “adjustment parameter value”), the stop position of the cutting rod can be easily determined. Can be adjusted. There is no need to adjust the ascending cam switch CS1 and the descending cam switch CS2. The drive stop control unit 11 has an adjustment unit 12 that has a function of setting the adjustment parameter value. The adjustment process executed by the adjustment unit 12 will be described later with reference to FIG.

  The adjustment parameter value is stored in the memory 13. The drive stop control unit 11 performs control to stop driving of the motor 3 by reading the adjustment parameter value. Further, the adjustment parameter value includes two types, a value for the lowering operation and a value for the ascending operation.

  The memory 13 is configured by a nonvolatile memory such as a flash memory, for example. The adjustment parameter value stored in the memory 13 is displayed as a digital value on the display unit 15, and is updated by increasing / decreasing the value by operating the switch 17. The display unit 15 can be configured with, for example, a 7-segment LED, a liquid crystal display, or the like.

  The display unit 15 and the switch 17 are provided at positions away from the ascending cam switch CS1 and the descending cam switch CS2 that are protected by the dust cover, and are arranged and configured so that the switch 17 can be operated without removing the dust cover. For this reason, it is not necessary to remove the dust cover when operating the switch 17.

  Further, the motor drive control unit 10 includes an internal relay circuit unit having a relay CR3, a recovery contact CR3a of the relay CR3, and a recovery contact CR3b. The relay CR3 rises / falls according to a signal indicating the driving state of the motor output from the drive stop control unit 11. Specifically, the drive stop control unit 11 outputs an ON (H level) signal when the motor 3 is being driven (including stop control that is not completely stopped), and OFF (L) when the motor 3 is not driven. Level) signal is output to the relay CR3. Therefore, the relay CR3 rises when the motor 3 is driven and falls when the drive of the motor 3 is stopped.

  The recovery contact CR3a is provided between the cam switch CS and the relay CR2. The recovery contact CR3a acts to raise the relay CR2 when the detection result of the cam switch CS becomes H level (arrival detection) and the relay CR3 where the motor 3 is not driven is dropped. The recovery contact CR3a, together with the relay CR2 and the recovery contact CR2a, corresponds to motor power supply control means for stopping the supply of motor power.

  The recovery contact CR3b is connected in series with the operation contact CR1c of the relay CR1, and the operation contact CR1c and the recovery contact CR3b connected in series are connected in parallel with the operation contact CR2b for operating the brake 5. The recovery contact CR3b acts to actuate the brake when the relay CR1 is lifted by a control input for raising the cutoff rod and the relay CR3 is not driven.

  The external relay circuit unit 20 provided outside the motor drive control unit 10 has a signal line between the cam switch CS and the relay CR2 in the motor drive control unit 10 as compared with the conventional external relay circuit unit 200 shown in FIG. The difference is that it has been pulled in and that a new circuit is provided in parallel with the operation contact CR2b responsible for controlling the brake 5 to operate. In the latter parallel circuit, the operation contact CR1c of the relay CR1 is provided in the external relay circuit unit 20, and the recovery contact CR3b is provided in the internal relay circuit unit of the motor drive control unit 10.

Next, the operation of the railroad crossing breaker 1 will be described.
First, the descending operation will be described. When a control input for lowering the cutoff rod is made, the relay CR1 is dropped and the operation contact CR1a is opened, whereby a signal for instructing the lowering operation is input to the motor drive control unit 10. In addition, when the operation contact CR1b is opened, the descending cam switch CS2 of the cam switches CS is enabled. At this time, the angle of the cutoff rod is outside the detection angle range of the descending cam switch CS2 (decreasing). The descent cam switch CS2 is not detected because it is outside the reference position. As a result, the relay CR2 falls regardless of the recovery contact CR3a. When the relay CR2 falls, a recovery contact CR2a is formed, and motor power is supplied to the motor drive control unit 10.

  Further, the operation contact CR1c is opened by the fall of the relay CR1, and the operation contact CR2b is also opened by the fall of the relay CR2, so that the operation of the brake 5 is stopped and released.

  When the motor drive control unit 10 is activated by the supply of motor power, the motor drive control unit 10 drives the motor 3 in the downward direction in accordance with a control input instructing the downward operation. When the motor 3 is driven, the relay CR3 is lifted and the recovery contact CR3a is opened. However, even before the relay CR3 is lifted, the lower cam switch CS2 is not detected, so the relay CR2 is still in a fallen state. No change.

  Further, the recovery contact CR3b is opened by raising the relay CR3, but the operating contact CR1c is opened even before the raising of the relay CR3, so that the state of release of the brake 5 does not change.

  Then, when the cutoff rod is lowered by driving the motor 3 and reaches the detection angle range (downward reference position) of the lowering cam switch CS2, the lowering cam switch CS2 detects this. Then, since the detection result is at the H level (arrival detection), the drive stop control unit 11 performs control to decelerate and stop the drive of the motor 3 according to the adjustment parameter value for the descent operation stored in the memory 13. . In this embodiment, since the adjustment parameter value is the delay time, the rotational speed of the motor 3 is gradually reduced at a timing delayed by the set delay time after the detection result becomes H level (arrival detection). To stop it.

  When the driving of the motor 3 is stopped and the driving state is not driven, the relay CR3 is dropped, the recovery contact CR3a is formed, and the relay CR2 is lifted. Then, the operating contact CR2b is formed by raising the relay CR2, and the brake 5 is activated.

  In other words, when the lowering operation of the cutoff rod stops, the rotational speed of the motor 3 is gradually reduced and stopped, so that the cutoff rod does not vibrate when stopped. Further, since the brake 5 is operated in accordance with the stoppage of the lowering operation of the cutoff rod, the lowering speed of the cutoff rod becomes slow and is held at the stopped position.

  Further, the recovery contact CR2a is opened due to the lifting of the relay CR2, the supply of motor power to the motor drive control unit 10 is stopped, and the motor drive control unit 10 becomes inoperable. However, since the relay CR3 has already dropped, the recovery contact CR3a does not change in the configuration state, and the relay CR2 of the external relay circuit unit 20 remains in the raised state. Therefore, the operation contact CR2b is also configured, and the brake 5 is activated.

  Next, the ascending operation will be described. When a control input for raising the cutoff rod is made, the relay CR1 is raised and the operation contact CR1a is configured, so that a signal instructing the raising operation is input to the motor drive control unit 10. Further, by configuring the operation contact CR1b, the ascending cam switch CS1 of the cam switches CS is enabled. At this time, the angle of the cutoff rod is outside the detection angle range of the ascending cam switch CS1 (rising). Ascending cam switch CS1 is not detected. As a result, the relay CR2 falls regardless of the recovery contact CR3a. When the relay CR2 falls, a recovery contact CR2a is formed, and motor power is supplied to the motor drive control unit 10.

  Further, the operating contact CR1c is configured by raising the relay CR1, and the recovery contact CR3b is configured by dropping the relay CR3 at this time, so that the brake 5 is in an operating state.

  When the motor drive control unit 10 is activated by the supply of the motor power and the motor 3 is driven in the upward direction, the relay CR3 is lifted and the recovery contact CR3b is opened. Thereby, the operation of the brake 5 is stopped and released. That is, during the ascending operation, the brake 5 is released according to the driving of the motor 3. More specifically, the brake 5 is released after the motor 3 is driven. For this reason, the blocking rod does not fall temporarily.

  When the cutoff rod rises by driving the motor 3 and reaches the detection angle range (upward reference position) of the upside cam switch CS1, the upside cam switch CS1 detects this. Then, since the detection result has become the H level (arrival detection), the drive stop control unit 11 performs control to decelerate and stop the drive of the motor 3 according to the adjustment parameter value for the ascending operation stored in the memory 13. . It is the same control as the descent operation.

  When the driving of the motor 3 is stopped and the driving state is not driven, the relay CR3 is dropped, the recovery contact CR3a is formed, and the relay CR2 is lifted. As a result, the operation contact CR2b is configured and the brake 5 is operated. That is, even in the ascending operation, when the blocking rod stops at the raised position, the rotational speed of the motor 3 is gradually decelerated and stopped, so that the blocking rod does not vibrate when stopped.

  Further, the recovery contact CR2a is opened by raising the relay CR2, the supply of the motor power to the motor drive control unit 10 is stopped, and the motor drive control unit 10 becomes inoperable. However, placing the brake 5 in the operating state is the same as the descent operation.

  Next, the adjustment process executed by the adjustment unit 12 will be described with reference to FIG. FIG. 2 is a flowchart showing the flow of adjustment processing. The adjustment process is started after the cutoff rod is stopped at the raised or lowered position by the normal operation in which the motor is driven to the raised or lowered position according to the current adjustment parameter value.

  When the adjustment process is started, first, the adjustment unit 12 forcibly turns on the signal output to the relay CR3 (H level), raises the relay CR3, and releases the brake 5 (step S2). . Then, steps S6 to S14 are repeated until the adjustment processing end operation (step S4) is performed.

  That is, when an operation input for adjusting which stop position is the rising position or the lowering position is made (step S6), the adjustment parameter value for the upward movement or the adjustment parameter value for the downward movement according to the operation input is obtained. It reads from the memory 13 and drives the motor 3 to the stop position corresponding to the adjustment parameter value, and controls to stop at the stop position (step S8). As a result, the blocking rod is stopped at the stop position before adjustment. Note that if the stop position where the current cutting stop is the same as the stop position to be adjusted, the operation input in step S6 is not performed (step S6), and step S8 can be skipped.

  When an adjustment operation for adjusting the stop position is input from the switch 17 (step S10: YES), the motor 3 is driven by the adjustment amount input by the operation (step S12), and the memory is set according to the adjustment amount. The adjustment parameter value stored in 13 is updated (step S14). It goes without saying that the direction of adjustment (rising or descending) is also input. When adjusting the stop position opposite to the adjusted stop position (one of the raised position and the lowered position) or when performing readjustment, steps S4 to S14 are repeated.

  When the adjustment is completed and an end operation is performed (step S4: YES), the adjustment unit 12 turns off the signal output to the relay CR3 (L level) and operates the brake 5 by dropping the relay CR3. (Step S20), and the adjustment process is terminated. And it returns to normal operation.

  As described above, according to the railroad crossing breaker 1 of the present embodiment, while the motor power is supplied and the cam switch CS is not detected, the motor drive control unit 10 controls the drive of the motor 3 according to the control input and cuts off. Is moved up or down. And according to the detection of the cam switch CS, the rotational speed of the motor 3 is gradually decelerated and stopped. On the other hand, the supply of motor power is stopped when the cam switch CS is detected and the motor 3 is not driven (relay of the relay CR3). For this reason, even when the cutoff rod reaches the reference position and the cam switch CS detects it, the supply of motor power is not immediately stopped, and the rotational speed of the motor can be gradually reduced and stopped. When the drive of the motor 3 is stopped, the brake 5 is activated. For this reason, the vibration suppression of the blocking rod when stopping the lifting operation is realized, and the stop position of the blocking rod can be reliably held.

  Further, when a control input for causing the ascending operation is made, the brake 5 for braking the breaking rod is in an operating state until the motor 3 is driven. For this reason, the blocking rod does not fall temporarily at the start of the raising operation.

  Also, the control for gradually decelerating and stopping the rotation speed of the motor 3 according to the detection of the cam switch CS can be adjusted by the adjustment parameter value. For this reason, by changing and setting the adjustment parameter value, it is possible to easily adjust the position at which the blocking rod stops.

  In addition, the setting of the adjustment parameter value can be easily realized by the adjustment process. That is, after the brake 5 is forcibly released and the blocking rod is moved to a given stop position, the motor 3 is driven and controlled according to the adjustment operation of the adjuster, and the adjustment parameter value is automatically updated. As a result, adjustment is performed. Thereby, a simple adjustment that does not require skill is realized.

Although one embodiment to which the present invention is applied has been described above, the form to which the present invention is applicable is not limited to the above-described embodiment.
For example, an electronic control device in which the functions of the motor drive control unit 10 and the external relay circuit unit 20 are realized by software without using a relay may be configured. In this case, the functions of the motor drive control unit 10 and the external relay circuit unit 20 may be realized in software inside the electronic control unit.

DESCRIPTION OF SYMBOLS 1 Railroad crossing breaker 3 Motor 5 Brake 10 Motor drive control part 11 Drive stop control part
12 Adjustment unit

Claims (3)

A motor that moves the cutting rod up and down, a motor drive control unit that is activated when motor power is supplied to control the drive of the motor, and an external relay circuit unit that is provided outside the motor drive control unit A railroad crossing breaker equipped,
The external relay circuit section is
Detecting means for detecting that the blocking rod has reached a predetermined rising reference position during the lifting operation, and has reached a predetermined lowering reference position during the lowering operation;
Brake relay,
Brake operation contact for operating the brake of the blocking rod by raising the brake relay;
With
The motor drive controller is
While the motor drive control unit is being activated and the detection means is not detected, the motor is driven and controlled in accordance with a control input instructing an ascending operation or a descending operation, and the rotation of the motor is detected according to the detection of the detection means. Drive control means for gradually decelerating and stopping the speed;
A motor drive determination relay that rises when the motor is driven by the drive control means;
A first motor drive determination recovery contact that recovers when the motor drive determination relay falls;
With
In the external relay circuit unit, the output of the detection means is connected to the brake relay via the first motor drive determination recovery contact,
The external relay circuit unit further includes a recovery contact that drops when the brake relay is lifted and stops the supply of the motor power to the motor drive control unit ,
Railroad crossing breaker. The motor drive control unit further includes a second motor drive determination recovery contact that recovers when the motor drive determination relay drops.
The external relay circuit unit further includes an operating contact that operates when the control input is an instruction input that causes a rising operation,
A series circuit of the operation contact and the second motor drive determination recovery contact is configured to be connected in parallel with the brake operation contact,
The railroad crossing breaker according to claim 1. The drive control means has adjustment means for adjusting a parameter relating to deceleration of the motor in order to adjust the stop position of the blocking rod.
A railroad crossing breaker according to claim 1 or 2 .

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