JP5859097B1 - Passenger conveyor - Google Patents

Abstract

Provided is a passenger conveyor that can be restarted safely and promptly after the passenger conveyor stops due to a power failure. A motor 20 that detects a power failure of a power source 5, stores the immediately preceding rotation direction and immediately preceding load torque of the motor 20 immediately before the power source 5 fails, can detect power recovery and can generate the immediately preceding load torque at startup. When the torque is smaller than the startable torque, the motor is restarted in the immediately preceding rotation direction. [Selection] Figure 3

Description

  Embodiments of the present invention relate to passenger conveyors.

  When the power of the passenger conveyor is lost due to a power failure or the like, the operating passenger conveyor loses the power supplied to the motor and cannot continue the operation, stops and operates the electromagnetic brake to hold the position of the step.

  In order to operate the passenger conveyor again, an attendant goes to the site, and if there are passengers on the steps at that time, first remove the passengers, then check the safety visually and then restart the operation. Will do.

  On the other hand, if the passenger conveyor main body breaks down or the safety device is activated, it is necessary for the clerk to check after checking the interior of the machine, the foreign object being caught, the state of the safety device, the presence of abnormal noise, etc. It takes a certain amount of time.

  In the case of a power failure, it is not an emergency stop due to a passenger conveyor failure or passenger protection, so it is only necessary to check the safety on the steps, and the staff can recover with a relatively light check.

JP 2012-176811 A

  However, when the passenger conveyor stops due to a power failure, the main body is not broken or the safety device has not operated, so the passenger conveyor is not judged to be broken and a failure signal is not transmitted to the monitoring room or the like.

  Generally, when a monitoring device provided in a monitoring room or the like receives a failure signal from a passenger conveyor, it alerts an attendant. Therefore, when the passenger conveyor does not transmit a failure signal, an alarm is not issued, and there is a problem that it takes more time than necessary to restore the passenger conveyor without the attendant noticing.

  In addition, when a power outage occurs at a large shopping center, many passenger conveyors stop all at once, and it takes a considerable amount of time if the clerk performs a safety check or restart operation for each unit. There was a point.

  Then, in view of the said problem, embodiment of this invention aims at providing the passenger conveyor which can be restarted safely and rapidly after that when a passenger conveyor stops by a power failure. .

An embodiment of the present invention includes a power source, a motor driven by the power source, a driving sprocket that rotates by driving the motor, a plurality of endlessly connected steps that run by rotation of the driving sprocket, and the power source A detecting unit for detecting a power failure and a power recovery, and a storage unit for storing the immediately preceding rotation direction and the immediately preceding load torque of the motor immediately before stopping when the detecting unit detects a power failure and the motor is stopped. A control unit that restarts the motor in the immediately preceding rotation direction when the detection unit detects power recovery and the immediately preceding load torque is smaller than the startable torque of the motor that can be generated at startup; have a, wherein the control unit measures the return time to power recovery after the start of power failure, the line of the re-activated when the return time is less than the reference return time a predetermined , It is a passenger conveyor.

The side view of the escalator of this embodiment. The enlarged view of a ratchet apparatus. Block diagram of the escalator. The 1st flowchart which shows the control method at the time of a power failure of an escalator. The 2nd flowchart which shows the control method at the time of a power failure of an escalator.

  The escalator 10 of this embodiment is demonstrated based on FIGS.

(1) Escalator 10
The structure of the escalator 10 is demonstrated based on FIG. 1 and 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 includes a motor 20 including an induction motor (induction motor), a reduction gear, an output sprocket attached to the output shaft of the reduction gear, a drive chain 22 driven by the output sprocket, And an electromagnetic brake 19 such as a disc brake for stopping the rotation and maintaining the stopped state. The drive sprocket 24 is rotated about the shaft 21 by the drive chain 22. In addition, a control box 50 in which a control unit 8 that controls the motor 20 and the electromagnetic brake 19 is housed is provided in the machine room 14 on the upper floor side.

  A driven sprocket 26 that rotates about a shaft 23 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 30 a of the step 30 travels on a guide rail (not shown) fixed to the truss 12, and the wheel 30 b 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. 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, and the lower floor side is provided at the entrance / exit on the ceiling surface of the machine room 16 on the lower floor side. The boarding / exiting plate 34 is provided horizontally. A comb-like comb is provided at the front end of the boarding / alighting plate 32, and the step 30 appears from this comb. Further, a comb-like comb is also provided on the boarding / alighting plate 34.

  On the ceiling surface 4 of the escalator 10, cameras 72 and 74 capable of photographing the step 30 of the escalator 10 are attached.

  As shown in FIG. 2, the drive sprocket 24 is provided with a ratchet device 60 that is a stop device that prevents the step 30 from moving in the downward direction. In this ratchet device 60, a ratchet gear 62 is provided coaxially with the shaft 21 of the drive sprocket 24, and teeth 70 are provided on the outer periphery of the ratchet gear 62. A ratchet base 64 is provided at the bottom of the truss 12, and a braking claw 66 is provided from the ratchet base 64 so as to be rotatable about a rotation shaft 68. When the braking claw 66 is engaged with the teeth 70 of the ratchet gear 62 as shown in FIG. 2, the ratchet gear 62 does not rotate, and the step 30 can be prevented from moving in the downward direction.

(2) Electrical configuration of escalator 10 The electrical configuration of the escalator 10 will be described based on the block diagram of FIG.

  The motor 20 is rotationally controlled by an inverter device 6 that can variably control the power supply voltage and frequency, and the inverter device 6 is connected to a three-phase AC power source 5 via a circuit breaker 7. The control unit 8 is connected to the inverter device 6 and the electromagnetic brake 19, and the control unit 8 outputs a control signal to the inverter device 6 so that the motor 20 is rotationally controlled at a predetermined rotational speed and a predetermined torque. The control unit 8 also serves as a detection unit that detects a power failure and power recovery of the power supply 5.

  The control unit 8 is connected to the image analysis unit 9, the operation panel 52, the operation panel 56, the speaker 54, the speaker 58, the ratchet device 60, and the safety device 76. A camera 72 and a camera 74 are connected to the image analysis unit 9. The image analysis unit 9 will be described in detail later.

  The inverter device 6, the control unit 8, and the image analysis unit 9 are accommodated in a control box 50 provided inside the machine room 14.

  As the safety device 76, a skirt guard pinched detection device provided in the skirt guard 44, an inlet pinched detection device provided in the inlet portions 46, 48, a step lift detection device provided in the guide rail 25, an emergency stop button Etc. The skirt guard pinching detection device 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, and the inlet pinching detection device is a handrail belt 38. Is a device that detects when a foreign object (for example, a passenger's hand or baggage) is simultaneously drawn into the inlet part 46 or the inlet part 48.

(3) Image analysis unit 9
Next, the image analysis unit 9 will be described.

  The camera 72 and the camera 74 capture a moving image, and can capture all of the steps 30 from the entrance to the exit.

  The image analysis unit 9 confirms the presence / absence of passengers on the step 30, the number of passengers, and the movement of passengers on the step 30 from moving images taken by the camera 72 and the camera 74. As a method for confirming the presence of passengers and the number of passengers, for example, there are the following methods.

  First, the image analysis unit 9 stores an initial image in which no passengers are shown in advance.

  Next, the image analysis unit 9 compares the frame image (hereinafter referred to as “detected image”) of the moving image on the step 30 input from the cameras 72 and 74 with the initial image.

  Next, the image analysis unit 9 determines that there is a passenger when there is a change area different from the initial image on the detected image. Further, when there are a plurality of change areas, the image analysis unit 9 determines that there are passengers as many as the change areas.

  Regarding the confirmation of the movement of the passenger on the step 30, the image analysis unit 9 tracks how the change area moves for each frame image (detected image) and moves along the step 30. If so, it is determined that the passenger is moving between the steps 30.

(4) Operating State of Escalator 10 Next, a control method when the power source 5 of the escalator 10 is interrupted will be described based on the flowcharts of FIGS. 4 and 5.

  In step S <b> 1, the control unit 8 is operating the escalator 10. Then, the process proceeds to step S2.

  In step S2, the control unit 8 always monitors the power supply 5 and proceeds to step S3.

  In step S3, if the control unit 8 detects a power failure of the power source 5, the process proceeds to step S4 (in the case of YES), and if not detected, the process returns to step S1 (in the case of NO).

  In step S4, since the power failure occurred, the escalator 10 stops and the process proceeds to step S5.

  In step S5, the control part 8 memorize | stores the driving information just before a stop. Specifically, the operation direction immediately before the stop (hereinafter referred to as “immediate operation direction”) and the load torque (hereinafter referred to as “immediate load torque”) are stored in the storage unit inside the control unit 8, and the process proceeds to step S6. This immediately preceding load torque changes to the number of passengers on the step 30, and becomes larger as the number of passengers increases.

  In step S <b> 6, the control unit 8 measures the time after the occurrence of a power failure and obtains the power recovery time until power recovery. When the power recovery time is longer than the standard power recovery time, the process proceeds to step S8 (in the case of NO), and when the power recovery time is shorter than the standard power recovery time, the process proceeds to step S7 (in the case of YES). The reference power recovery time is, for example, 1 minute.

  In step S7, the control unit 8 proceeds to step S9 if the immediately preceding load torque is smaller than the startable torque that can be generated when the motor 20 is activated (in the case of YES), and proceeds to step S8 if it is greater (NO). in the case of).

  In step S8, the control unit 8 does not perform power recovery within the reference power recovery time, and the immediately preceding load torque is greater than the startable torque, so the escalator 10 is not restarted and is stopped and terminated.

  In step S9, the control unit 8 determines whether the immediately preceding operation direction is ascending operation or descending operation, and proceeds to step S10 in the case of ascending operation (in the case of YES), and proceeds to step S11 in the case of descending operation ( In the case of NO).

  In step S10, since the step 30 is in the ascending operation, the ratchet device 60 is operated to proceed to step S11 so that the step 30 does not descend. The ratchet device 60 is operated because it is possible to prevent the step 30 from being lowered by reverse rotation due to insufficient torque even when there is a sudden load fluctuation immediately after the start of restart.

  In step S11, the image analysis unit 9 analyzes the state of the passenger on the current step 30 based on the detection images photographed by the camera 72 and the camera 74, and proceeds to step S12.

  In step S <b> 12, the image analysis unit 9 confirms the presence or absence of passengers, the number of passengers, and the movement of passengers on the step 30. Then, the process proceeds to step S13.

  In step S13, if the image analysis unit 9 determines that there is a passenger, the process proceeds to step S14 (in the case of YES), and if it is determined that no passenger exists, the process proceeds to step S18 (in the case of NO).

  In step S14, since passengers are present on the step 30 and the number of passengers can be confirmed, the control unit 8 calculates the expected load torque after the motor 20 is started from the number of passengers. Calculate the difference from the load torque. This difference is referred to as “load fluctuation during stoppage”. If the load fluctuation during the stop is within a predetermined allowable value, the control unit 8 proceeds to step S16 (in the case of YES), and proceeds to step S15 when it is larger than the allowable value (in the case of NO).

  In step S15, the control unit 8 performs a warning broadcast that prompts the passenger to evacuate from the step 30 from the speakers 54 and 58 by voice, and returns to step S14. Here, the caution broadcast is performed in order to reduce the load at the time of activation by moving passengers on the steps 30 away.

  In step S <b> 16, since the load fluctuation during the stop is within the allowable value, the control unit 8 determines whether or not the passenger on the step 30 is stationary based on the analysis by the image analysis unit 9. When the passenger on the step 30 is moving between the steps 30, the image analysis unit 9 proceeds to step S17 assuming that the passenger is not stationary (NO), and proceeds to step S18 if the passenger is stationary. .

  In step S <b> 17, the control unit 8 performs a warning broadcast by voice so that the moving passenger stops on the step 30, and returns to step S <b> 16. The caution broadcast is performed here in order to stop the passenger and ensure the safety of the passenger at the time of restart.

  In step S18, even if there are no passengers on the step 30, or even if there are passengers, the load variation during the stop is within an allowable value, and the passengers are stationary. Make a warning broadcast to the effect. Then, the process proceeds to step S19.

  In step S19, the control unit 8 gently starts the escalator 10 in the immediately preceding operation direction, accelerates it to the rated speed, and proceeds to step S20.

  In step S20, the control part 8 cancels | releases the ratchet apparatus 60, after confirming rotation of the motor 20 in the case of a raise operation, and progresses to step S21.

  In step S21, the restart of the escalator 10 is completed. Then, the process returns to step S1.

  When the safety device 76 is activated and the escalator 10 is stopped, unlike the case where the power source 5 is cut off, the control unit 8 does not restart by the control method described above, and the staff checks the safety. After confirming, the clerk restarts.

(5) Effect According to the present embodiment, when the escalator 10 is stopped due to a power failure for a relatively short time, the detected image obtained by the cameras 72 and 74 that has been used to confirm safety that has been visually observed until now. The escalator 10 can be automatically restarted according to the result of confirming the safety of the passenger on the step 30. By automatically restarting in this way, there is no human operation until the restart, and the staff can quickly recover without going to the site. Therefore, the stop time of the escalator 10 can be shortened, the influence on the passenger can be reduced, and the labor of the staff can be reduced.

(6) Modified Example In the above embodiment, the ratchet device 60 is used as the stop device, but the present invention is not limited to this, and other stop devices may be used.

  Moreover, in the said embodiment, although demonstrated corresponding to the escalator 10, it may replace with this and may adapt to the moving walk.

  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 5 ... Power supply, 8 ... Control part, 9 ... Image analysis part, 10 ... Escalator, 20 ... Motor, 24 ... Drive sprocket, 30 ... Step, 54 ... Speaker, 58 ... Speaker, 60 ... Ratchet device, 72 ... Camera, 74 ... Camera

Claims (9)

Power supply,
A motor driven by the power source;
A drive sprocket that rotates by driving the motor;
A plurality of steps connected endlessly traveling by rotation of the drive sprocket;
A detection unit for detecting power failure and power recovery of the power source;
When the detection unit detects a power failure and the motor stops, a storage unit stores the immediately preceding rotation direction of the motor and the immediately preceding load torque immediately before stopping.
A controller that restarts the motor in the immediately preceding rotational direction when the detection unit detects power recovery and the immediately preceding load torque is smaller than the startable torque of the motor that can be generated at startup;
I have a,
The control unit measures the return time from the start of the power failure to the power recovery, and performs the restart when the return time is shorter than a predetermined reference return time.
Passenger conveyor. A camera for photographing the step;
Analyzing the detection image captured by the camera, an image analysis unit for detecting the number of passengers on the stopped step, and
Have
The controller restarts the motor when the passenger cannot be detected on the steps in the detection image.
The passenger conveyor according to claim 1. A camera for photographing the step;
Analyzing the detection image captured by the camera, an image analysis unit for detecting the number of passengers on the stopped step, and
Have
The control unit calculates an expected load torque after activation from the number of passengers on the steps in the detection image, and a difference between the expected load torque and the immediately preceding load torque is smaller than a predetermined allowable value To restart the motor,
The passenger conveyor according to claim 1. The control unit performs a caution broadcast that prompts the passenger to leave the step when the difference between the predicted load torque and the immediately preceding load torque is greater than a predetermined allowable value.
The passenger conveyor according to claim 3. A camera for photographing the step;
Analyzing the detection image taken by the camera, an image analysis unit for determining movement between the steps of the passenger on the stopped step;
Have
When the image analysis unit determines that there is no movement between the steps of the passenger, the control unit restarts the motor.
The passenger conveyor according to claim 1. When the image analysis unit determines that there is a movement between the steps of the passenger, the control unit performs a caution broadcast so as to be stationary for the passenger.
The passenger conveyor according to claim 5. A stop device for stopping the drive sprocket rotating so that the step moves in the downward direction;
The control unit activates the stop device when the immediately preceding rotational direction is a direction to move the step in the upward direction, and operates the stop device when the drive sprocket rotates in the upward direction after the restart. To release,
The passenger conveyor according to claim 1. The control unit performs a warning broadcast to the effect that the restart is performed before the restart.
The passenger conveyor according to claim 1. The control unit does not restart when the safety device is activated and the motor is stopped,
The passenger conveyor according to claim 1.

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