JP6072108B2 - Passenger conveyor - Google Patents

Description

  Embodiments of the present invention relate to passenger conveyors.

  Conventionally, in passenger conveyors such as escalators and moving walkways, steps are driven by a motor, and this motor is controlled by a control device to start, stop, determine a moving direction, and move speed. A CPU (Central Processing Unit) is mounted inside the control device, and the control is performed by the CPU.

JP 2011-241077 A

  As described above, in the case of a control unit with a built-in CPU, when an error occurs in the CPU, the drive device is stopped, and when the passenger conveyor is restarted, the manager needs to rush to the site and restart it. There was a problem.

  Then, in view of the said problem, embodiment of this invention aims at providing the passenger conveyor which can restart a drive device, only when passenger safety can be ensured.

In an embodiment of the present invention, a control unit that controls activation and stop of a driving device that drives a step of a passenger conveyor and a moving direction of the step includes a CPU and a monitoring unit that monitors the CPU, The control unit is connected to a safety circuit of a safety device in a plurality of peripheral devices and an SM relay that is turned off by the monitoring unit. The safety circuit includes a contact of each safety device, an SM contact of the SM relay, The SC relay for stopping the drive device is connected in series, and in the first step, the monitoring unit stops the CPU when detecting an error of the CPU and turns off the SM relay, The SM contact of the safety circuit is turned OFF, the SC relay is operated to stop the driving device, and in the second step, the monitoring unit is a predetermined time after the stop. The CPU is restarted, and in the third step, after the CPU is restarted, the CPU checks whether the safety device is normal. In the fourth step, the CPU A passenger conveyor that is normal and that restarts the drive device when the drive device is waiting to be stopped.

The side view of the escalator which shows one Embodiment of this invention. The circuit diagram of a drive circuit. The circuit diagram of an operation control circuit. A circuit diagram of a main control circuit. The flowchart when an error occurs in the CPU.

  Hereinafter, the escalator 10 of one Embodiment of this invention is demonstrated based on FIGS.

(1) Structure of the escalator 10 The structure of the escalator 10 is demonstrated based on FIG. FIG. 1 is an explanatory view of the escalator 10 as seen from the side.

  A truss 12 that is a framework of the escalator 10 is supported using support angles 2 and 3 across the upper and lower floors of the building 1.

  Inside the upper floor side machine room 14 at the upper end of the truss 12, a drive unit 18 for running the steps 30 is provided. The drive device 18 stops and stops the rotation of the motor 20, the speed reducer, the output sprocket attached to the output shaft of the speed reducer, the drive chain 22 driven by the output sprocket, and the motor 20. And a disc brake for maintaining the state. The drive sprocket 24 is rotated by the drive chain 22. A control box 50 for controlling the motor 20, the disc brake, and the like is provided in the machine room 14 on the upper floor side.

  A driven sprocket 26 is provided inside the lower floor machine room 16 at the lower end of the truss 12. Between the driving sprocket 24 on the upper floor side and the driven sprocket 26 on the lower floor side, a pair of left and right endless step chains 28 and 28 are suspended. A plurality of steps 30 are attached to the pair of left and right step chains 28, 28 at equal intervals. The wheel 301 of the step 30 travels on a guide rail (not shown) fixed to the truss 12, and the wheel 302 travels on the guide rail 25 fixed to the truss 12.

  On the left and right sides of the truss 12, a pair of left and right balustrades 36, 36 are erected. A handrail is provided above the balustrade 36, and the handrail belt 38 moves in synchronization with the step 30 along the handrail. Inside the pair of left and right balustrades 36, lighting devices 68 made of LEDs are provided at predetermined intervals. A front skirt guard 40 on the upper floor side is provided in the lower front part on the upper floor side of the balustrade 36, and a front skirt guard 42 on the lower floor side is provided in the lower front part on the lower floor side. Inlet portions 46 and 48, which are entrances and exits of the handrail belt 38, protrude from each other. A skirt guard 44 is provided at the lower side of the balustrade 36, and the step 30 travels between the pair of left and right skirt guards 44, 44. Operation panels 52 and 56 and speakers 54 and 58 are provided on the inner side surfaces of the skirt guards 44 on the upper and lower floors, respectively.

  The upper floor side entrance / exit board 32 is provided horizontally at the entrance / exit on the ceiling surface of the machine room 14 on the upper floor side. The boarding / exiting plate 34 is provided horizontally. A comb-like comb 60 is provided at the front end of the upper floor board 32, and the step 30 enters the comb 60. A comb-like comb 62 is also provided at the tip of the lower floor board 34.

  A pair of left and right poles 64 and 64 are erected at the entrance on the upper floor side, and a passenger sensor 105 is provided above the poles 64 and 64, respectively. When the passenger passes between the pair of left and right poles 64, 64, the passenger sensor 105 detects the passenger. In addition, a pair of left and right poles 66 and 66 are provided at the entrance on the lower floor side, and a passenger sensor 106 is provided above the pole 66.

(2) Configuration of Safety Device 107 As the safety device 107, for example, a skirt guard sandwiched detection device 107-1 provided in the skirt guard 44, and an inlet sandwiched detection device 107-2 provided in the inlet portions 46 and 48 are provided. Step lift detection device 107-3, emergency stop button 107-4, step missing detection device 107-5, etc. provided on the guide rail 25. The skirt guard pinching detection device 107-1 is a device that detects that a foreign object (for example, clothes or luggage) is pinched between the skirt guard 44 and the step 30. Is a device that detects when a foreign object (for example, a passenger's hand or luggage) is simultaneously drawn into the inlet portion 46 or the inlet portion 48 where the handrail belt 38 is drawn. Each of these devices 107-1, 107-2,..., 107-n is configured by a limit switch. When the limit switch is turned off and the cause of detection is eliminated, the limit switch returns to the original state. Is turned ON.

(3) Electrical configuration of escalator 10 The electrical configuration of the escalator 10 will be described based on the circuit diagrams of FIGS. FIG. 2 shows the overall drive circuit 108 of the escalator 10, FIG. 3 shows the operation control circuit 109, and FIG. 4 shows the main control circuit 110. The operation control circuit 109 and the control unit 115 are housed inside the control box 50.

  First, the drive circuit 108 will be described with reference to FIG. In the drive circuit 108, the power source 4 is a three-phase AC power source, and is connected to the motor 20 via the main control contactors 112a and 112b. The main control contactor 112a is turned on during the ascending (UP) operation, and the main control contactor 112b is turned on during the descending (DOWN) operation.

  Next, the operation control circuit 109 will be described with reference to FIG. In the operation control circuit 109, an SC contact 122, an OFKSW switch 120, and a KSW switch 119 are connected in series. The OFKSW switch 120 and the KSW switch 119 are provided on the operation panels 52 and 56, respectively. Further, the main control contactor 112a, the holding circuit 121a, the release circuit 126b on the ascending operation side, and the main control contactor 112b, the holding circuit 121b, and the release circuit 126a on the descending operation side are connected in parallel, and this parallel circuit is connected to the series circuit. Has been.

  When the escalator 10 is lifted, when the administrator inputs the spring return type KSW switch 119 to the ascending (UP) side, the main control contactor 112a is turned on, the holding circuit 121a is held, and the release circuit 126a is held. Is opened, and the motor 20 in the drive circuit 108 rotates in the ascending operation direction.

  On the other hand, when the escalator 10 is lowered, when the administrator inputs the KSW switch 119 to the lowering (DN) one-shot, the main control contactor 112b is turned on, the holding circuit 121b is held, and the release circuit 126b is turned on. The motor 20 in the drive circuit 108 is rotated in the descending operation direction.

  When stopping the escalator 10, when the administrator inputs the OFKSW switch 120 to one-shot, the holding circuit 121a or 121b of the main control contactor 112a or 112b is opened, and the release circuit 126a or 126b is turned on. The power supply to 20 is cut off and stopped.

  The SC contact 122 is a contact of the SC relay 123 of the safety circuit 114 described later.

  Next, the main control circuit 110 will be described with reference to FIG. The main control circuit 110 includes a safety circuit 114 and a control unit 115. The control unit 115 includes a microcomputer, and includes a CPU 151, a storage unit 152, a monitoring unit 153, and a communication unit 154. A lighting device 68 and passenger detection sensors 105 and 106 are connected to the control unit 115.

  In the safety circuit 114, each contact of the safety devices 107-1, 107-2,..., 107-n installed in each part of the SC relay 123 and the escalator 10 and the SM contact 125 of the SM relay 124 are connected in series. Has been. The SC contact of the operation control circuit 109 corresponding to the SC relay 123 when any one of the safety devices 107-1, 107-2,..., 107-n and the SM relay 123 is abnormal and the contact is turned OFF. As a result, the main control contactors 112a and 112b are turned OFF, and the power supply to the motor 20 is cut off. The SM relay 124 turns off the SM contact 125 when the control unit 115 determines that there is some abnormality, and is turned on when there is no abnormality. Moreover, the signal of each contact of safety device 107-1,107-2, ..., 107-n is input into the control part 115. FIG.

  A CPU (Central Processing Unit) 151 of the control unit 115 is, for example, a clock synchronous type, and controls the operation of each unit at a regular timing by a clock signal, and controls the flow of instruction interpretation and operation program control. And execute the calculation.

  The storage unit 153 is a memory and stores an operation program and data of the CPU 151. As data, for example, which safety device 107 is normal or whether the current state of the escalator 10 is stored is stored. . For example, the storage unit 153 stores whether the escalator 10 is currently in operation or is on standby. Note that “waiting for stop” of the escalator 10 means that no passenger is detected on the step 30 of the escalator 10, and the power supply 4 supplied to the drive device 18 is cut off for the purpose of energy saving, and the control of the control unit 115 or the like. It is said that the control power is supplied only to the system.

  The communication unit 154 outputs a failure signal or the like to an external monitoring center or the like via an I / O port.

  The monitoring unit 152 is a watch dog timer and is a hardware measuring instrument of the CPU 151. Exception processing is executed when the main program of the control unit 115 falls into an illegal state such as a hang-up and a regular watchdog operation is not performed. Here, the exception processing restarts the CPU 151 for the purpose of returning the hung-up system to normal operation. A case where the regular watchdog operation is not performed is referred to as “CPU 151 tripped”.

  The control unit 115 receives signals from the ascending side holding circuit 121a and the descending side holding circuit 121b of the main control contactors 112a and 112b via the I / O port, and can detect the start / stop and the ascending / descending of the escalator 10. . Further, the signal of the SC contact 122 of the SC relay 123 is input to the control unit 115 via the I / O port, and the state of the safety circuit 114 can be detected.

(4) Operation State of Control Unit 115 Next, an operation state when the CPU 151 of the control unit 115 has an error will be described based on the flowchart of FIG.

  In step S1, the monitoring unit 152 constantly monitors the trip of the CPU 151. Control power to the control unit 115 is supplied even when the driving device 18 is in operation and is on standby. Therefore, the monitoring unit 152 continues to monitor the CPU 151 even when the drive device 18 is on standby. And when the monitoring part 152 detects the trip of CPU151, it progresses to step S2, and when not detecting, step S1 is continued.

In step S2, since a trip has occurred in the CPU 151, the monitoring unit 152 turns off the SM contact 125 by the SM relay 124 to shut off the power supply of the motor 20 and stop the escalator 10 in order to ensure passenger safety. . Next, the process proceeds to step S3. When the escalator 10 is stopped, in order to prevent passengers from entering, the lighting device 68 is turned off, and the speakers 54 and 58 broadcast that the escalator 10 is out of order and entry is prohibited.

  In step S3, the monitoring unit 152 restarts the CPU 151 after a predetermined time has elapsed after the drive device 18 is completely stopped, that is, after the power supply is cut off, and then proceeds to step S4. Note that, when the CPU 151 does not restart, the monitoring unit 152 performs restart a plurality of times.

  In step S4, the monitoring unit 152 monitors whether or not a trip has occurred in the restarted CPU 151. If the trip is resolved, the process proceeds to step S7, and if not resolved, the process proceeds to step S5. Also, when the CPU 151 does not restart, the process proceeds to step S5.

  In step S5, since the trip of the CPU 151 has not been resolved, the monitoring unit 152 determines that the CPU 151 is in failure and proceeds to step S6.

  In step S <b> 6, the monitoring unit 152 outputs a failure signal notifying that the CPU 151 has a failure from the communication unit 154 to an external administrator.

  In step S7, since the trip of the CPU 151 has been eliminated, the CPU 151 checks whether or not the peripheral device has failed, and proceeds to step S8. Here, the peripheral devices are safety devices 107-1 to 107-n, a disc brake of the driving device 18, and the like.

  In step S8, if all peripheral devices are normal, the process proceeds to step S9. If there is any failure, the CPU 152 proceeds to step S6 without restarting the escalator 10, and the external administrator. The failure signal is output using the communication unit 154.

  In step S9, the CPU 151 determines from the data in the storage unit 153 whether or not the trip has occurred during the operation of the driving device 18 or in the stop standby state. , Outputs a failure signal to the administrator. If the trip is in a standby state, the process proceeds to step S10.

  In step S10, the CPU 151 turns on the lighting device 68 again, informs the broadcaster that the escalator 10 will be restarted, and activates the passenger detection sensors 105 and 106 on the pole 64.64. Thereby, the passenger knows that the escalator 10 is restarted. When the passenger gets into the escalator 10 from the entrance / exit, the passenger sensor 105 or the passenger sensor 106 detects this, and proceeds to step S11. If no passenger is detected, step S10 is continued.

  In step S <b> 11, the control unit 115 restarts the drive device 18 and restarts the escalator 10.

(5) Effect According to the present embodiment, after the CPU 151 causes a trip, the CPU 151 is restarted to eliminate the trip, and the escalator 10 is restarted only when the escalator 10 is on standby. Therefore, passenger safety can be ensured, and it is not necessary for the administrator to go to the site to restart the escalator 10, thereby reducing the burden on the administrator.

  In addition, when the CPU 151 trips during the operation of the escalator 10, it does not restart and notifies the administrator. The reason for this is that if the escalator 10 in operation is restarted unattended, passenger safety may not be sufficiently secured. In this case, the manager comes to the escalator 10 by notification, and the operation panel 52, In 56, a starting operation is performed.

  Further, while the escalator 10 is stopped, the lighting device 68 is turned off to prevent passengers from entering, so that passengers do not get on the escalator 10 and passenger safety can be ensured.

  In addition, when the CPU 151 is restarted and the trip cannot be resolved, the administrator is notified, so that the administrator can easily confirm that the CPU 151 has failed.

  Even if the CPU 151 is not broken down, if any peripheral device is not normal, the administrator is notified, so the administrator can easily determine that the peripheral device is broken down. .

  Further, even when the escalator 10 is restarted, when the passenger is not detected, the restart is not performed, so that energy saving is achieved.

(6) Modified Example In the above embodiment, the watchdog timer is used as the monitoring unit 152, but in addition to this, another circuit for detecting an error of the CPU 151 may be provided. For example, a circuit that senses the heat generation state of the CPU 151 and stops when the heat generation state of the CPU 151 reaches a certain temperature or higher may be used.

  In the above embodiment, the motor 20 is controlled only by starting, stopping, and selecting the moving direction. However, when the motor 20 is inverter-controlled by an inverter circuit, the speed of the motor 20 can be adjusted. . In this case, the monitoring unit 152 may be provided in the logic circuit that controls the inverter circuit or the CPU of the control unit.

  In the above embodiment, as a method for preventing passengers from entering, the lighting device 68 is turned off and broadcasting by the speakers 54 and 58 is performed. However, the present invention is not limited to this, and a pair of left and right poles 64 and 64 or poles 66 and 66 are used. An alarm may be sounded when a passenger passes during the period.

  Moreover, in the said embodiment, in order to detect the presence or absence of a passenger, although the passenger sensor was provided in the poles 64 and 66, it replaces with this and a camera is provided in the ceiling in which the escalator 10 is installed, and the image of this camera is provided. The presence or absence of passengers may be recognized.

  Further, in the above embodiment, the description has been made by adapting to the step 30 of the escalator 10, but instead of this, it may be adapted to a step (step) of a moving sidewalk.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Escalator, 18 ... Drive device, 68 ... Illumination device, 105 ... Passenger sensor, 106 ... Passenger sensor, 107 ... Safety device, 108 ... Drive circuit, 114. ..Safety circuit, 115 ... control unit, 151 ... CPU, 152 ... monitoring unit, 154 ... communication unit

Claims (9)

The controller that controls the start and stop of the driving device that drives the steps of the passenger conveyor and the moving direction of the steps includes a CPU and a monitoring unit that monitors the CPU.
A safety circuit of a safety device in a plurality of peripheral devices and an SM relay that is turned off by the monitoring unit are connected to the control unit,
In the safety circuit, a contact of each safety device, an SM contact of the SM relay, and an SC relay that stops the driving device are connected in series,
In the first step, the monitoring unit stops the CPU when detecting an error of the CPU, turns off the SM relay, turns off the SM contact of the safety circuit, and operates the SC relay. To stop the drive,
In the second step, the monitoring unit restarts the CPU after a predetermined time from stopping,
In a third step, after the CPU restarts, the CPU checks whether the safety device is normal,
In a fourth step, the CPU restarts the driving device when the safety device is normal and the driving device is on standby.
A passenger conveyor characterized by that. The monitoring unit is a watchdog timer and monitors a trip of the CPU;
The passenger conveyor according to claim 1. In the second step, the monitoring unit outputs a failure signal to the outside when the CPU cannot be restarted.
The passenger conveyor according to claim 1. In the third step, the CPU outputs a failure signal to the outside when the safety device is not normal.
The passenger conveyor according to claim 1. In the fourth step, the CPU outputs a failure signal when the CPU becomes an error other than during the standby state of the drive device.
The passenger conveyor according to claim 1. In the fourth step, the control unit restarts the driving device when a passenger is detected, and continues the stop standby when the passenger is not detected.
The passenger conveyor according to claim 1. The control unit prevents passengers from entering until it is confirmed that the safety device is normal.
The passenger conveyor according to claim 1. The control unit turns off the lighting device in order to prevent the passenger from getting in,
The passenger conveyor according to claim 7 . The passenger conveyor is an escalator or a moving sidewalk.
The passenger conveyor according to claim 1.

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