JP2011241077A - Monitoring device for passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitoring device for a passenger conveyor, which surely detects a failure of the passenger conveyor when the failure occurs.SOLUTION: The monitoring device for the passenger conveyor has a monitoring part 16 that monitors identification data of a safety sensor 7 which becomes an abnormal stop cause stored by a control part 15 for each prescribed period of time and transmits new identification data to the outside when the identification data are newly stored.

Description

  Embodiments described herein relate generally to a passenger conveyor monitoring device.

  Passenger conveyors are used in public facilities such as commercial facilities and stations, and are an important flow line. In the unlikely event that it stops due to a failure, the moving means will be steps, so it must be restored early.

  Passenger conveyors are often directly controlled, and when an operator operates a key switch, the main control contactor in the passenger conveyor drive circuit is turned on to supply power to the passenger conveyor drive motor. On the other hand, if the operator stops the key switch, the main control contactor is turned off and the power to the motor is shut off.

  In addition, the safety circuit of this passenger conveyor is connected in series with the contact points of safety sensors installed in each part of the passenger conveyor, and when any one of the safety sensors detects an abnormality, the contact points are turned off. Passenger conveyor stops.

Japanese Patent Laid-Open No. 7-25573

  However, there is a problem that it is unclear from a distant monitoring center whether or not a maintenance worker needs to be dispatched when the safety sensor operates and the passenger conveyor stops as described above.

  In addition, it is conceivable to always communicate data from the passenger conveyor to confirm the operating state of the safety circuit, but since there are many passenger conveyors installed in one facility, the monitoring center and multiple passengers If communication with the conveyor is complicated, there is a problem that the line is congested and the real-time property is lacking in monitoring.

  Then, this invention provides the monitoring apparatus of a passenger conveyor which can detect the failure of a passenger conveyor reliably in view of the said problem.

  According to an embodiment of the present invention, when a plurality of safety sensors installed on a passenger conveyor and at least one safety sensor is operated to stop the passenger conveyor, the identification data of the safety sensor is stored in a storage unit. A monitoring unit that monitors the identification data stored in the storage unit every predetermined time, and transmits the new identification data to the outside when the identification data is newly stored. It is the monitoring apparatus of the passenger conveyor characterized by having.

It is a top view of the vicinity of the entrance / exit of the escalator of Example 1 of this invention. It is an electrical circuit diagram of a present Example escalator. It is a flowchart of the safe operation state of an escalator. It is a functional block diagram which shows a data communication area. It is a functional block diagram which shows the communication data area of Example 2. FIG. 6 is a timing chart illustrating the operation of the second embodiment.

  Hereinafter, the passenger conveyor of one Example of this invention is demonstrated based on FIGS. In the present embodiment, description will be given using an escalator 1 which is one of passenger conveyors.

  The escalator 1 of Example 1 of this invention is demonstrated based on FIGS. 1-4.

(1) Structure of escalator 1 The structure of the escalator 1 is demonstrated based on FIG. FIG. 1 is a plan view of the vicinity of the entrance / exit of the escalator 1.

  As shown in FIG. 1, a handrail belt 2, a balustrade panel 3, a skirt guard 4, a step 5, and a comb 6 are disposed near the entrance of the escalator 1. Moreover, between the lower end of the skirt guard 4 and the step 5, there are a plurality of safety sensors 7-1, 7-2,..., 7-n that operate when a human body or a foreign object is sandwiched. is set up. These safety sensors 7-1, 7-2,..., 7 -n are detection devices sandwiched between skirt guards, and are constituted by limit switches. When a human body or a foreign object is pinched, the limit switches are turned off. When the pinched state is resolved, the limit switch returns to the original state and turns on.

(2) Electrical configuration of escalator 1 The electrical configuration of the escalator 1 will be described based on the electrical circuit diagram of FIG. FIG. 2A shows the overall drive circuit 8 of the escalator 1, FIG. 2B shows the operation control circuit 9, and FIG. 2C shows the main control circuit 10.

  First, the drive circuit 8 will be described with reference to FIG.

  In the drive circuit 8, the power source 11 is a three-phase AC power source, and is connected to the motor 13 via main control contactors 12a and 12b. The main control contactor 12a is turned on during the ascending (UP) operation, and the main control contactor 12b is turned on during the descending (DOWN) operation. The motor 13 is a drive source of the escalator 1 and drives the step 5 and the handrail belt 2.

  Next, the operation control circuit 9 will be described with reference to FIG.

  In the operation control circuit 9, an SC contact 22, an OFKSW switch 20, and a KSW switch 19 are connected in series. Further, the main control contactor 12a, the holding circuit 21a, the release circuit 26b on the ascending operation side, and the main control contactor 12b, the holding circuit 21b, the release circuit 26a on the descending operation side are connected in parallel, and this parallel circuit is connected to the series circuit. Has been.

  When the escalator 1 is operated to rise, when the operator inputs a one-shot input of the spring return type KSW switch 19 to the up (UP) side, the main control contactor 12a is turned on, the holding circuit 21a is held, and the release circuit 26a is held. Is opened, and the motor 13 in the drive circuit 8 rotates in the ascending operation direction.

  On the other hand, when the escalator 1 is lowered, when the operator inputs the KSW switch 19 to the lowering (DN) one-shot, the main control contactor 12b is turned on, the holding circuit 21b is held, and the opening circuit 26b is turned on. The motor 13 in the drive circuit 8 is rotated in the descending operation direction.

  When stopping the escalator 1, when the operator inputs the one-shot input to the OFKSW switch 20, the holding circuit 21a or 21b of the main control contactor 12a or 12b is opened and the opening circuit 26a or 26b is turned on. The power supply to 13 is cut off and stopped.

  The SC contact 22 is a contact of the SC relay 23 of the safety circuit 14 to be described later.

  Next, the main control circuit 10 will be described with reference to FIG.

  The main control circuit 10 includes a safety circuit 14, a control unit 15, a monitoring unit 16, a communication network 17, and an external monitoring center 18.

  The control unit 15 includes a microcomputer and includes a CPU 151 and a memory 152.

  The safety circuit 14 will be described. In the safety circuit 14, each contact of safety sensors 7-1, 7-2,..., 7 -n installed in each part of the SC relay 23 and the escalator 1 and an SM contact 25 of the SM relay 24 are connected in series. Has been. Then, the SC contact of the operation control circuit 9 corresponding to the SC relay 23 when any one of the safety sensors 7-1, 7-2,. As a result, the main control contactors 12a and 12b are turned OFF, and the power supply to the motor 13 is cut off. The SM relay 24 turns off the SM contact 25 when the control unit 15 determines that there is some abnormality, and is turned on when there is no abnormality. Moreover, the signal of each contact of safety sensor 7-1,7-2, ..., 7-n is input into the control part 15. FIG.

  The controller 15 receives signals from the ascending side holding circuit 21a and the descending side holding circuit 21b of the main control contactors 12a and 12b, and can detect the start / stop of the escalator 1 and the ascending / descending. Further, the signal of the SC contact 22 of the SC relay 23 is input to the control unit 15 so that the state of the safety circuit 14 can be detected. Thereby, the control part 15 can judge by reading an operation state, without starting and stopping the escalator 1 directly.

  The control unit 15 and the monitoring unit 16 are connected by serial communication or the like, and the monitoring unit 16 can write and read data in the memory 152 stored in the control unit 15.

  The monitoring unit 16 can transmit and receive data by communicating with a remote monitoring center 18 via the communication network 17.

  An operator is stationed in the monitoring center 18, and a plurality of escalators 1 installed in each facility are collectively monitored by the monitoring table 27. If there is an abnormality, a maintenance staff is dispatched to the escalator 1 having the abnormality.

(3) Safety Confirmation Operation of Control Unit 15 Next, the safety confirmation operation of the control unit 15 will be described based on the flowchart of FIG.

  In step 1, when the operator turns on the KSW switch 19 and the power supply 11 starts up, the control unit 15 turns on the SM relay 24 to establish the safety circuit 14.

  In step 2, the control unit 15 receives signals from the holding circuits 21a and 21b, the SC contact 22, and the SW signal from the SM relay 24.

  In step 3, the control unit 15 checks whether the escalator 1 is rising, descending, or stopped based on the signals from the holding circuits 21a and 21b. Returning to step 4, if an ascending signal or a descending signal is input, it is determined that the escalator 1 is activated, and the process proceeds to step 4.

  In step 4, the control unit 15 performs an operation check of the safety sensor 7. That is, it is determined whether or not an OFF signal is input from each contact of the safety sensors 7-1, 7-2,..., 7-n. Is determined to be operating.

  In step 5, the control unit 15 proceeds to step 6 when there is at least one operation of the safety sensor 7 (that is, when an OFF signal is input in the OFF state), and the operation of the safety sensor 7 is performed. If there is not (that is, an ON signal), the process returns to Step 2.

  In step 6, the control unit 15 holds the failure state, and in step 7, unique identification data corresponding to the safety sensor 7 to which the OFF signal is input is generated. For example, unique identification data such as 1 when the safety sensor 7-1 operates and 2 when the safety sensor 7-2 operates are determined in advance, and the identification data of the safety sensor 7 that causes the unique identification data to be a stop factor. Remember as.

  In step 8, the controller 15 operates the SC relay 23 to turn off the ascending or descending signal from the holding circuit 21a or 21b, that is, the safety circuit 14 and the operation control circuit 9 are operated, and the escalator 1 is activated. Stop and detect if stop due to failure is confirmed. If this detection is not possible, it is determined that the escalator 1 is operating.

  In step 9, the control unit 15 proceeds to step 10 when a stop due to a failure is detected (in the case of YES), and proceeds to step 11 as an erroneous failure detection when the escalator 1 continues to operate without stopping. Proceed (if NO).

  In step 10, the unique identification data of the safety sensor 7 that is the stop factor generated in step 7 is registered as abnormal data.

  In step 11, assuming that the escalator 1 has not stopped due to a failure, the operation of the safety sensor 7 is regarded as a false detection, the failure detection state is cleared, and the process returns to step 2 to continue monitoring the operation state.

(4) Data Transmission Method Next, the abnormal data transmission state from the control unit 15 to the monitoring unit 16 will be described based on the functional configuration diagram of FIG.

  The CPU 151 of the control unit 15 is provided with a buffer in the data communication area of the memory 152 and can hold n pieces of abnormal data. Each time an abnormality occurs and the escalator 1 stops, the abnormal data is sequentially changed from 1 to n. Abnormal data is stored, and when it reaches the end, it returns to 1 again. In order to be able to determine where the latest abnormal data is, the storage position is updated to the pointer when it is stored.

  The monitoring unit 16 periodically reads the pointer in the memory 152 (for example, every 1 minute and 30 seconds), determines that an abnormality has occurred if the pointer value has been updated, and obtains abnormal data from the area indicated by the pointer. The data is read and notified to the monitoring center 18 via the communication network 17 and the read abnormal data is transmitted.

  Since the unique identification data of the safety sensor 7 that has caused the stop in the escalator 1 that has stopped due to a failure is displayed on the monitoring console 27 of the monitoring center 18, the operator can easily know what the cause of the failure is. Therefore, it is possible to reliably determine whether or not to send maintenance personnel.

(5) Effect According to the present embodiment, when the safety sensor 7 is operating, it is confirmed that the escalator 1 has been stopped by the operation of the safety circuit 14, and then erroneous data is registered to prevent erroneous notification. be able to. As a result, the monitoring center 18 can reliably grasp the cause of the escalator 1 stopping, prevent unnecessary maintenance personnel from responding to the occurrence of an abnormality in the escalator 1, and provide a quick and effective maintenance service. Can do.

  Further, even if the communication network 17 is congested, abnormal data can be reliably transmitted.

(6) Modification Example In the first embodiment, the communication network 17 is congested, and transmission of abnormal data may be delayed from real time.

  Therefore, as a modified example of the first embodiment, a clock unit is provided in the control unit 15, and time data is registered together with abnormal data in step 10 in the flowchart of FIG. Thereby, the operator of the monitoring center 18 can confirm the exact time when the safety sensor 7 is operated and the escalator 1 is stopped.

  Further, since the time of the clock unit of the control unit 15 also generates an error, the clock of the control unit 15 is periodically transmitted from the monitoring center 18 via the communication network 17 and the monitoring unit 16 so as to be synchronized with the clock of the monitoring center 18. Send the time adjustment signal to the unit to adjust. Thereby, the exact time can be confirmed when an abnormality occurs.

  In addition to the safety sensor 7, another sensor is installed to monitor handrail stop abnormality detection, motor speed abnormality, etc., and if these are abnormal, the control unit 15 turns the contact 25 off by the SM relay 24. The escalator 1 may be protected and stopped.

  An escalator 1 according to a second embodiment of the present invention will be described with reference to FIGS. 5 and 6.

  The difference between the present embodiment and the first embodiment is that the escalator 1 has a first signal FD1 and a second signal FD2 for indicating the states of “unstartable state”, “restartable state”, and “restartable state”. Is generated by the control unit 15.

(1) Operation state The flow of operation of the present embodiment will be described. FIG. 6 is a timing chart showing the operation.

  During the operation of the escalator 1, for example, the SC relay 23 of the safety circuit 14 operates, the SC contact 22 is turned OFF, the main control contactor 12a or 12b is turned OFF, and the escalator 1 stops.

  The control unit 15 registers the abnormal data in the same manner as in the first embodiment, confirms the SC signal from the SC contact 22 and the rising signal or the falling signal from the maintenance circuits 21a and 21b, and performs a predetermined time T (for example, If the SC signal does not return from OFF to ON after 30 seconds), the first signal FD1 and the second signal FD2 are generated in the ON state. This state represents an “unstartable state” in which the escalator 1 is stopped and cannot be started.

  Next, as shown in the functional configuration diagram of FIG. 5, the CPU 151 of the control unit 15 writes the first signal and the second signal writing area in the communication data area of the memory 152 of the control unit 15 according to a predetermined logic. That is, the control unit 15 writes the state of FD1 in the first signal area of the communication data area and the state of FD2 in the second signal area. For example, 1 is written if ON, and 0 is written if OFF. This writing operation is the same in the subsequent operation.

  Next, the control unit 15 turns off the second signal FD2 when confirming that the cause of the stop of the escalator 1 has been removed by the operator and the SC signal has returned to the ON state. This state represents a “restartable state” in which the escalator 1 can be started by operating the KSW switch 19.

  Next, when the operator operates the KSW switch 19 to restart the escalator 1 safely, the control unit 15 confirms the activation from the signals of the maintenance circuits 21a and 21b and turns off the first signal FD1. This state represents the “restart state” of the escalator 1.

  The monitoring unit 16 reads the communication data areas of the first signal FD1 and the second signal FD2 in the memory 152 at regular intervals (every 1 minute and 30 seconds), and when the state of these signals is changed, the monitoring center 18 To communicate.

  In the monitoring center 18, the received first signal FD1 and second signal FD2 are displayed on the monitoring console 27. In order to make it easy to understand the state of the escalator 1, when this display is performed, if both the first signal FD1 and the second signal FD2 are in the ON state, the display unit of the monitoring console 27 displays “unstartable state”, When the first signal FD1 is in the ON state but the second signal FD2 is in the OFF state, “restartable state” is displayed. When both the first signal FD1 and the second signal FD2 are in the OFF state, “restart state” is displayed. Is displayed.

  Thereby, it becomes easy for the operator of the monitoring center 18 to confirm the state of the escalator 1, and it is not overlooked. And in the monitoring center 18, it can be used as a judgment material whether a maintenance worker should correspond to the field by the state of the 1st signal FD1 and the 2nd signal FD2 which the operator received from the escalator 1 which stopped abnormally.

(2) Effects According to the present embodiment, the control unit 15 generates the first signal FD1 and the second signal FD2 and transmits them to the remote monitoring center 18 via the monitoring unit 16 and the communication network 17. The current state with respect to the abnormal stop of the escalator 1 is clarified, and it is possible to prevent unnecessary maintenance personnel from responding to the failure quickly.

(3) Modification Example In the second embodiment, when the control unit 15 is configured to turn off the second signal FD2 in synchronization with the SC signal being turned on, the operator can safely remove the abnormality of the escalator 1. When the limit switch of the sensor 7 chatters, there is a possibility that it can be restarted even if the abnormal state is not resolved.

  Therefore, a certain delay time is provided between the SC signal ON and the second signal FD2 OFF, and the second signal FD2 is turned OFF when the SC signal is reliably turned ON. Also good.

  As a method of providing this delay time, it may be determined by an application in the control unit 15 or may be delayed on the circuit. The delay time is, for example, 1 second to 5 seconds.

  Similarly, the first signal FD1 may be provided with a delay time so that the first signal FD1 is turned OFF after the escalator 1 is reliably activated.

Example of change

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof.

  In each said Example, although the escalator 1 was demonstrated as a passenger conveyor, not only this but a moving sidewalk may be sufficient.

  In each of the above embodiments, the skirt guard is sandwiched and detected as a device provided as a safety sensor. However, the present embodiment is not limited to this. Can be applied.

DESCRIPTION OF SYMBOLS 1 Escalator 7 Safety sensor 11 Power supply 12 Main control contactor 13 Motor 14 Safety circuit 15 Control part 16 Monitoring part 17 Communication network 18 Monitoring center

Claims (6)

A plurality of safety sensors installed on the passenger conveyor;
When at least one safety sensor operates and the passenger conveyor stops, a control unit that stores identification data of the safety sensor in a storage unit;
Monitoring the identification data stored in the storage unit every predetermined time, and when the identification data is newly stored, a monitoring unit for transmitting the new identification data to the outside;
A passenger conveyor monitoring device characterized by comprising: The control unit includes a clock unit, measures a time when the safety sensor is operated, and stores the operation time together with the identification data in the storage unit.
The passenger conveyor monitoring device according to claim 1. The control unit erases data stored in the storage unit when a reset signal is input from the monitoring unit, and performs time adjustment of the clock unit when a time adjustment signal is input from the monitoring unit.
The passenger conveyor monitoring device according to claim 2. The controller is
If the safety sensor does not return to the normal state for a predetermined time or more, the first signal and the second signal are generated in the ON state,
If the safety sensor returns to the normal state, the second signal is changed from the ON state to the OFF state,
After the second signal is changed to the OFF state, the first signal is changed from the ON state to the OFF state when the passenger conveyor is restarted.
The monitoring device for a passenger conveyor according to claim 3. The control unit changes the first signal and the second signal from the ON state to the OFF state when conditions for changing the first signal and the second signal from the ON state to the OFF state have continued for a predetermined time. Change to
The monitoring device for a passenger conveyor according to claim 4. A display unit for displaying each state of the passenger conveyor in an “unstartable state”, a “restartable state”, or a “restart state” based on the ON / OFF states of the first signal and the second signal Having
The passenger conveyor monitoring device according to claim 5.

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