JP6374367B2 - Passenger conveyor and control method thereof - Google Patents

Description

  The present invention relates to a passenger conveyor such as an escalator and a moving sidewalk, and a method for controlling the passenger conveyor, and more particularly, to a passenger conveyor including a motor for driving a step and a motor for driving a moving handrail, and a control method thereof.

  Passenger conveyors such as escalators and moving walkways are endlessly connected steps that move between the entrances and exits, railings provided on both sides of the steps, and handrails that move on the railing in synchronization with the steps The passenger is conveyed by the moving part between the entrance and the exit.

  In general, the steps of the passenger conveyor and the moving handrail are driven by the same electric motor. For this reason, the step and the moving handrail cannot be controlled independently, and when the moving handrail slips, a situation occurs in which the step and the moving handrail operate at different speeds different from the set values. In view of this, a passenger conveyor is known in which an electric motor for driving a step and an electric motor for driving a moving handrail are made independent and the respective driving speeds are controlled in synchronization. And in such a passenger conveyor, at the time of an emergency stop according to the safety device operation of the passenger conveyor, if the step and the moving handrail are stopped at the same time, the passenger may lose balance and move downward. there were.

  Therefore, conventionally, when it is detected that the safety device has been operated and the step and the moving handrail are stopped in an emergency, the step and the moving handrail are stopped with a predetermined time difference according to the detected driving direction of the passenger conveyor, and the safety device is operated. It has been proposed to stabilize the posture of passengers at the time of emergency stop. For example, in the event of an emergency stop due to the operation of the safety device, the treadle stops when the escalator is raised by the control of the stop distance control means that controls the treadle and the handrail to stop at a predetermined stop position according to the driving direction of the escalator. There is a technique in which the handrail is advanced by a predetermined process with respect to the position and stopped, and when the escalator is lowered, the treadle is advanced by a predetermined distance with respect to the stop position of the handrail (see Patent Document 1). In addition, when the passenger conveyor is raised, the handrail is stopped at a deceleration slower than the step, and when the passenger conveyor is lowered, the handrail is stopped at a deceleration earlier than the step. Even in the event of an emergency stop, the passenger's body will be tilted upward, and the step will stop at a predetermined time at a predetermined deceleration that seems to be the best from the occurrence of an emergency stop condition. There is one that is put into operation (see Patent Document 2).

JP 2012-017200 A JP 2010-247934 A

  In Patent Documents 1 and 2, consideration is given to stopping at a constant deceleration by controlling the operation of the tread (step) and handrail at the time of emergency stop due to safety device operation or emergency stop of the passenger conveyor. No consideration is given to the occurrence of a power outage. That is, when the steps of the passenger conveyor and the moving handrail are driven by separate electric motors, the power is not supplied to the electric motor when a power failure occurs, and therefore the steps and the moving handrails are stopped by brake braking. In this case, the inertia of the step drive device and the moving handrail drive device is different, and the inertia of the moving handrail drive device is very small compared to the step drive device, so the moving handrail has a greater deceleration than the step and stops first. To do. Therefore, since the position of the moving handrail part where the passenger is grasped is greatly shifted backward with respect to the driving direction with respect to the passenger on the step, the passenger may be out of balance and move downward particularly during the ascending operation.

  An object of the present invention is to decelerate and stop a step and a moving handrail in synchronism by using regenerative power generated from a stepping motor when a power failure occurs.

  In order to solve the above problems, the present invention provides a stepping motor for driving a step of moving between an upper entrance and a lower entrance, a step inverter for controlling driving of the stepping motor, In a passenger conveyor having a moving handrail motor for driving a pair of moving handrails moving along a balustrade arranged on both sides of the step, and a moving handrail inverter for controlling the driving of the moving handrail motor A converter for converting an alternating current from an alternating current power source into a direct current, a direct current circuit for smoothing the direct current output of the converter and applying it to the step inverter, and smoothing the direct current output of the converter and the moving handrail A DC circuit for a handrail to be applied to the inverter for power supply and power supplied from the AC power source, and the step Control circuit for controlling the operation of the inverter for the handrail and the inverter for the handrail, the regenerative resistor for absorbing the regenerative power generated from the inverter for the step, and the DC output side both ends of the converter and the regenerative resistor both ends, respectively. A plurality of regenerative resistor side power supply changeover switches, a plurality of power supply changeover switches on the control circuit side connected to both ends of the DC output side of the converter and both ends of the DC voltage input side of the control circuit, and the control The circuit opens the regenerative resistor side power supply changeover switches and closes the control circuit side power supply changeover switches at the time of a power failure of the AC power supply, respectively, and loads the load information of the step inverter and the moving handrail Set a deceleration command for each inverter based on the load information of the inverter, Giving the deceleration command that serial set in the respective inverters, and characterized in that the deceleration stop in synchronization with said moving handrail and the step.

  According to the present invention, when a power failure occurs, the step and the moving handrail can be synchronized and decelerated and stopped using the regenerative power generated from the stepping motor.

It is a schematic side view which shows the structure of the passenger conveyor which concerns on this invention. It is a circuit diagram of the power supply device for a step and the power supply device for a handrail in a passenger conveyor. It is a block block diagram of the control circuit in a power supply device. It is a flowchart for demonstrating operation | movement of the control circuit at the time of the descent | fall operation of a passenger conveyor.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is included in the range.

  First, the configuration of the passenger conveyor will be described with reference to FIG. FIG. 1 is a schematic side view showing the structure of a passenger conveyor according to the present invention. In FIG. 1, a plurality of steps 1 are arranged on an escalator as a passenger conveyor or a moving sidewalk so as to be movable from an upper entrance / exit near the entrance floor 4 to a lower entrance / exit near the exit floor 5. At the same time, a pair of balustrades 3 that support the movable handrail 2 are erected on the skirt portion 16 on the left and right sides of these steps 1.

  Each step 1 is connected in an endless manner by a chain 6, and the chain 6 is wound around a sprocket 7 in the vicinity of the exit floor plate 5 and a sprocket 8 in the vicinity of the entrance floor plate 4. The sprocket 8 is rotatably connected to the step drive device 11 via the drive chain 12. The step driving device 11 has a stepping motor 9 and a speed reducer 10 and is disposed below the entrance floor plate 4. A step power supply device 17 is connected to the step motor 9. The step drive device 11 drives the sprocket 8 via the drive chain 12 to drive the chain 6 and step 1.

  Further, a moving handrail driving device 15 including a moving handrail motor 14 is disposed in the vicinity of the skirt portion 16, and the moving handrail 2 is moved to the balustrade 3 via the moving handrail driving device 15 by the rotational driving of the moving handrail motor 14. Move along. A control device 13 for controlling the operation of the step 1 and the moving handrail 2 by controlling the stepping power supply device 17 and the moving handrail power supply device 18 is disposed below the entrance floor board 4. At this time, the stepping motor 9 uses the stepping power supply device 17 and the moving handrail motor 14 uses the moving handrail power supply device 18 to control the driving speed, acceleration, and deceleration of the step 1 and the moving handrail 2. . Due to the synchronous movement of Step 1 and the handrail 2, Step 1 transports passengers from the entrance floor board 4 to the exit floor board 5 during descending operation, and Step 1 from the entrance floor board 5 during descending operation. Carry the passenger to 4.

  FIG. 2 is a circuit diagram of a power supply device for a step and a power supply device for a handrail in a passenger conveyor. In FIG. 2, a stepping motor 9 is connected to a three-phase AC power source 19 used as a power source via an inverter unit 20. The inverter unit 20 includes a converter 21 that converts three-phase alternating current into direct current, a smoothing capacitor (step direct current circuit) 22 that smoothes the direct-current voltage converted by the converter 21, and a direct-current voltage based on a control signal. And an inverter (step inverter) 23 for controlling the stepping motor 9 by converting it into AC power having a frequency. The smoothing capacitor 22 is connected in parallel with a transistor 22a and a resistor 22b connected in series.

  A control circuit 26 is connected to the three-phase AC power source 19, and a control signal is given from the control circuit 26 to the inverter unit 20. A regenerative resistor 24 is connected to the input side of the inverter 23 via a power source switch 25. The regenerative resistor 24 is composed of a resistance element for absorbing regenerative power generated from the stepping motor 9 during the deceleration operation of the stepping motor 9. The power supply switch 25 is composed of a plurality of electromagnetic contactors 25a, 25b, 25c, and 25d. The magnetic contactors 25a and 25b are connected to both ends of the regenerative resistor 24 and connected to both ends of the DC output side of the converter 21 as a regenerative resistor side power source switching switch that is turned on and off according to a command from the control circuit 26. Has been. The magnetic contactors 25c and 25d are connected separately to both ends of the DC voltage input side of the control circuit 26 as a control circuit side power supply changeover switch that is turned on and off according to a command from the control circuit 26, and also connected to the DC output side of the converter 21. Connected separately at both ends.

  At this time, the control circuit 26 switches the power switch 25 so that the regenerative resistor 24 is connected to the inverter 23 side during normal operation. That is, the electromagnetic contactors 25a and 25b are turned on, and the electromagnetic contactors 25c and 25d are turned off. At this time, the regenerative power generated by the deceleration operation of the stepping motor 9 is absorbed by the regenerative resistor 24 through the inverter 23 and the electromagnetic contactors 25a and 25b. On the other hand, when the power failure of the three-phase AC power supply 19 is detected, the control circuit 26 disconnects the regenerative resistor 24 and switches the power supply switch 25 to the side where the control circuit 26 is connected to the smoothing capacitor 22. That is, the electromagnetic contactors 25a and 25b are turned off and the electromagnetic contactors 25c and 25d are turned on.

  Further, by connecting the DC circuit (step DC circuit) of the step power supply device 17 to the DC circuit of the mobile handrail power supply device 18, the power supplied from the three-phase AC power supply 19 to the step power supply device 17 is changed to the step power supply device 17. The power is supplied to the mobile handrail power supply 18 via the DC circuit (step direct current circuit) of the power supply 17 for power supply.

  The handrail power supply device 18 includes a smoothing capacitor (DC circuit for moving handrail) 27 that smoothes the output voltage of the converter 21 (DC voltage across the smoothing capacitor 22), a DC voltage based on a control signal, a predetermined voltage and a predetermined frequency. And an inverter 28 for controlling the moving handrail motor 14 by converting it into AC power.

  The control circuit 26 gives an operation / pause command to the inverter 23, an acceleration control command to the inverter 23, and the like as control signals to the inverter unit 20 of the step power supply device 17. Further, the control circuit 26 gives an operation / pause command to the inverter 28, an acceleration control command to the inverter 28, and the like as control signals to the power supply device 18 for the handrail.

  By using the inverter 23, there is a soft stop function that stops the inverter deceleration operation at a smaller deceleration speed when an abnormality is detected and prevents the passenger from falling. However, when a power failure occurs, power is not supplied to the inverter 23, so that the soft stop function cannot be functioned, resulting in a sudden stop operation due to brake braking. Therefore, the control circuit 26 is configured as follows.

  FIG. 3 is a block diagram of the control circuit. In FIG. 3, the control circuit 26 is composed of, for example, a computer having a CPU (Central Processing Unit), a memory, an input / output interface, and the like, and is regenerated by the power from the three-phase AC power source 19 or the deceleration operation of the stepping motor 9. Operates with power. Specifically, the control circuit 26 includes an input unit 29 that captures a power failure detection signal and a passenger load factor calculation signal (inverter load information of each inverter) from the current and voltage from the three-phase AC power source 19, and the input unit 29. The power failure detection unit 30 for detecting the power failure state from the signal captured in step S3, the power source switch opening / closing unit 31 for switching the power source switch 25 based on the detection signal of the power failure detection unit 30, and the detection signal of the power failure detection unit 30 In response, the inverter 23 receives a deceleration command extraction unit 32 that extracts a deceleration command to enter a regeneration state from the inverter load information of the inverter 23, and a switching signal from the power source switch opening / closing unit 31 to the power source switching switch 25. An output unit 33 that gives a deceleration command from the extraction unit 32 to the inverter 23 and a processing program at the time of a power failure are stored. A storage unit 34 that has a like control unit 35 that controls each unit based on the processing program.

  FIG. 4 is a flowchart for explaining the operation of the control circuit during the descending operation of the passenger conveyor. In FIG. 4, first, the power failure detection unit 30 of the control circuit 26 monitors the power failure detection signal through the input unit 29 and receives a power failure detection signal output from the input unit 29 to determine whether or not a power failure has been detected. If it judges (S1) and the power failure state of a building, ie, the power failure of the three-phase alternating current power supply 19, is detected, a power failure detection signal will be given to the power supply switch opening / closing part 31. Receiving this, the power source switch opening / closing unit 31 gives a switching signal to the power source switch 25 through the output unit 33. Upon receipt of this switching signal, the power supply switch 25 turns off the regenerative resistor side, that is, turns off the electromagnetic contactors 25a and 25b, and disconnects the regenerative resistor 24 from the inverter 23 side (S2). Is turned on, that is, the magnetic contactors 25c and 25d are turned on, and the control circuit 26 is connected to the inverter 23 side (S3).

  Next, the deceleration command extraction unit 32 that receives the power failure detection signal from the power failure detection unit 30 decelerates the deceleration at which the stepping motor 9 is in a regenerative state based on the inverter load information (passenger load factor calculation signal) of the inverter 23. The command signal is set, the set deceleration command signal is output to the inverter 23 through the output unit 33, and the mobile handrail motor 14 is in a regenerative state based on the inverter load information (passenger load factor calculation signal) of the inverter 28. A speed deceleration command signal is set, and the set deceleration command signal is output to the inverter 28 through the output unit 33 (S4).

  At this time, regenerative power is generated from the stepping motor 9 by the deceleration operation of the step driving device 11, that is, the deceleration operation by the inverter 23 (S5). The regenerative power is supplied to the smoothing capacitor 22 via the inverter 23 and is also supplied to the mobile handrail power supply 18 and the control circuit 26 (S6). That is, the DC voltage applied to both ends of the smoothing capacitor 22 by the regenerative power is applied to the control circuit 26 through the electromagnetic contactors 25c and 25d as a DC power source and also applied to both ends of the smoothing capacitor 27. . Thereby, using this regenerative power, the deceleration operation of step 1 by the inverter 23 is continued until the stop, and the deceleration operation of the moving handrail 2 by the inverter 28 is continued until the stop (S7). That is, the operation of the control circuit 26, the inverter 23, and the inverter 28 is continued based on the DC power source obtained from the regenerative power until the deceleration operation in Step 1 and the deceleration operation of the moving handrail 2 are stopped.

  Thus, when a power failure occurs, instead of using the DC voltage stored in the smoothing capacitor 22 when the power failure occurs, the deceleration command extraction unit 32 of the control circuit 26 determines that the regeneration state is based on the inverter load information of the inverter 23. Is set so that the inverter 23 is controlled at the set deceleration, and the regenerative power generated by the deceleration operation of the stepping motor 9 is used to operate the inverter 23 at the deceleration. Therefore, step 1 can be gently decelerated and stopped without providing an emergency power source.

  Further, the mobile handrail drive device 15 has a small inertia due to its configuration, and no regenerative electric power is generated from the mobile handrail motor 14 even if the inverter 28 performs a deceleration operation, and therefore no regenerative resistor is used. At this time, the power supply switch 25 such as the step power supply device 17 is not installed, and the smoothing capacitor 22 of the step power supply device 17 and the smoothing capacitor 27 of the moving handrail power supply device 18 are connected in parallel. A configuration is adopted in which the DC voltage generated at both ends is shared by the DC circuit of the step power supply device 17 and the DC circuit of the mobile handrail power supply device 18. For this reason, when a power failure occurs, a DC voltage generated across the smoothing capacitor 22 can be applied to both ends of the smoothing capacitor 27 as a power source of the inverter 28 by regenerative power generated from the stepping motor 9. As a result, even when a power failure occurs, the regenerative power generated from the stepping motor 9 can be used to continue the operation of the inverter 28, and the deceleration command extraction unit 32 of the control circuit 26 can obtain the inverter load information of the inverter 28. Based on this, the deceleration (deceleration command) that is in the regenerative state is set, and the inverter 28 is controlled with the set deceleration, so that the handrail 2 can also be slowly decelerated and stopped.

  According to the present embodiment, when a power failure occurs, the regenerative power generated from the stepping motor 9 can be used to synchronize the step 1 and the moving handrail 2 and slowly decelerate and stop. As a result, the passenger conveyor It is possible to improve safety.

  Further, in the present embodiment, as described above, the case where the power supply device 17 for the step and the motor 9 for the step, the power supply device 18 for the handrail of the handrail, and the motor 14 of the handrail of the hand are described as an example. As a configuration different from the above, the power supply device / motor / drive device for the left handrail and the right handrail are separately provided, so that the step power device and the step motor, the left handrail power device and the left handrail are separated. A motor for a right handrail, a power supply device for a right handrail, and a motor for a right handrail.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the deceleration for stopping and holding may be the same as the deceleration of the step and the moving handrail, or may be adjusted with a difference as in Patent Document 2. The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. It is possible to add, delete, and replace other configurations for a part of the configuration of the embodiment.

  In addition, each of the above-described configurations, functions, processing units, processing means, etc. may be realized by hardware by designing all of the partial sentences, for example, by an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files that realize each function can be stored in a recording device such as a memory, a hard disk, or an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.

  In addition, the control lines and information lines and their connections are those that are considered necessary for the explanation, and not all control lines and information lines and their connections on the product are necessarily shown. In practice, it may be considered that almost all or many configurations are related and connected to each other.

  1 step, 2 moving handrails, 3 balustrades, 4 ride floors, 5 exit floors, 6 chains, 7, 8 sprockets, 9 step motors, 10 speed reducers, 11 step drive units, 12 drive chains, 13 control units, 14 moving handrail motor, 15 moving handrail drive, 16 skirt, 17 step power supply, 18 moving handrail power supply, 19 three-phase AC power supply, 20 inverter unit, 21 converter, 22 smoothing capacitor, 23 inverter, 24 Regenerative resistor, 25 Power switch, 25a, 25b, 25c, 25d Electromagnetic contactor, 26 Control circuit, 27 Smoothing capacitor, 28 Inverter, 29 Input unit, 30 Power failure detection unit, 31 Power supply switch open / close unit, 32 Deceleration command extraction Part, 33 output part, 34 memory , 35 control unit.

Claims (6)

A stepping motor for driving a step moving between the upper and lower entrances and a lower entrance, a stepping inverter for controlling the driving of the stepping motor, and a balustrade arranged on both sides of the step In a passenger conveyor having a moving handrail motor for driving a pair of moving handrails, and a moving handrail inverter for controlling the driving of the moving handrail motor,
A converter that converts alternating current from an alternating current power source into direct current;
A step direct current circuit for smoothing the direct current output of the converter and applying it to the step inverter;
A DC circuit for moving handrails that smoothes the DC output of the converter and applies it to the inverter for moving handrails;
A control circuit that receives power from the AC power source and controls the operation of the step inverter and the mobile handrail inverter;
A regenerative resistor for absorbing regenerative power generated from the stepping motor ;
A plurality of regenerative resistor side power supply changeover switches respectively connected to both ends of the DC output side of the converter and both ends of the regenerative resistor,
A plurality of power source changeover switches on the control circuit side respectively connected to both ends of the DC output side of the converter and both ends of the DC voltage input side of the control circuit;
The control circuit includes:
In the event of a power failure of the AC power supply, the plurality of power supply changeover switches on the regenerative resistor side are each opened, and the plurality of power supply changeover switches on the control circuit side are each closed, load information on the step inverter and load on the moving handrail inverter A passenger conveyor that sets a deceleration command for each of the inverters based on the information, applies the set deceleration command to each of the inverters, and synchronizes the step with the moving handrail to stop the deceleration. In the passenger conveyor according to claim 1,
The control circuit includes:
Regenerative power generated from the stepping motor is taken in via the stepping DC circuit and a plurality of power supply changeover switches on the control circuit side, and the stepping inverter and the moving handrail inverter are decelerated based on the fetched regenerative power. Passenger conveyor characterized by controlling stop operation. In the passenger conveyor according to claim 1 or 2,
The step direct current circuit is:
Taking in the regenerative power generated from the stepping motor, applying a DC voltage obtained by the taken-in regenerative power to the step inverter and applying it to the mobile handrail inverter via the mobile handrail DC circuit. Passenger conveyor featuring. A stepping motor for driving a step moving between the upper and lower entrances and a lower entrance, a stepping inverter for controlling the driving of the stepping motor, and a balustrade arranged on both sides of the step In a passenger conveyor having a moving handrail motor for driving a pair of moving handrails, and a moving handrail inverter for controlling the driving of the moving handrail motor,
A converter that converts alternating current from an alternating current power source into direct current;
A step direct current circuit for smoothing the direct current output of the converter and applying it to the step inverter;
A DC circuit for moving handrails that smoothes the DC output of the converter and applies it to the inverter for moving handrails;
A control circuit that receives power from the AC power source and controls the operation of the step inverter and the mobile handrail inverter;
A regenerative resistor for absorbing regenerative power generated from the stepping motor ;
A plurality of regenerative resistor side power supply changeover switches respectively connected to both ends of the DC output side of the converter and both ends of the regenerative resistor,
A control method of a passenger conveyor having a plurality of power source changeover switches on the control circuit side connected to both ends of the DC output side of the converter and both ends of the DC voltage input side of the control circuit,
A first step of opening a plurality of power supply changeover switches on the regenerative resistance side and closing a plurality of power supply changeover switches on the control circuit side, respectively, when the control circuit has a power failure of the AC power supply;
The control circuit sets a deceleration command for each inverter based on the load information of the step inverter and the load information of the moving handrail inverter at the time of a power failure of the AC power supply, and the set deceleration command is set to each inverter. And a second step of decelerating and stopping the step and the moving handrail in synchronization with each other. In the passenger conveyor control method according to claim 4,
The control circuit includes:
In the first step, the regenerative power generated from the stepping motor is taken in via the step DC circuit and the control circuit side power supply changeover switches, and in the second step, the taken-up regenerative power is taken in. A passenger conveyor control method, comprising: controlling a deceleration stop operation for the step inverter and the moving handrail inverter. In the passenger conveyor control method according to claim 4 or 5,
The step DC circuit captures regenerative power generated from the step motor, applies a DC voltage obtained by the captured regenerative power to the step inverter, and moves the movement via the handrail DC circuit. A passenger conveyor control method comprising a third step of applying to a handrail inverter.

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