JP2021172496A - Passenger conveyor - Google Patents

Abstract

To provide a passenger conveyor capable of detecting abnormality immediately and highly reliably at starting without complicating a structure of a driving device.SOLUTION: A passenger conveyor includes a plurality of steps (1), moving handrails (2), a driving device having a motor (9) connected to a decelerator through a first endless rope-like body (21), a sprocket (8) connected to the decelerator through a second endless rope-like body (12) to transmit a driving force to the steps, and a moving handrail driving device (16) connected to the sprocket through a third endless rope-like body (15) to drive the moving handrails by power from the decelerator. The passenger conveyor includes a decelerator shaft rotation detector (22) provided on the decelerator, a moving handrail rotation detector (23) provided on the moving handrails, and a control device (13) determining abnormality of the driving device and the moving handrails based on detection signals of the decelerator shaft rotation detector and the moving handrail rotation detector in starting.SELECTED DRAWING: Figure 2

Description

The present invention relates to passenger conveyors such as escalators and moving walkways.

The passenger conveyor is provided with a step (step) that is connected in an endless manner and moves between entrances and exits, balustrades provided on both sides of the step, and a moving handrail that moves on the balustrade in synchronization with the step. Transport the upper passengers from the entrance to the exit.

When driving a passenger conveyor, power is transmitted from the drive device to an endless step chain in which steps are connected via a sprocket. In the drive device, the motor and the speed reducer are connected by a drive belt, and when the brake installed in the speed reducer is released and the motor starts rotating, the rotation of the motor is transmitted to the speed reducer. The speed reducer and the sprocket are connected by a drive chain or the like, and the rotation of the speed reducer is transmitted to the sprocket.

When a drive device is used, conventionally, a rotation detector is installed in the speed reducer, and the speed of the passenger conveyor is monitored based on the detection value of the rotation detector (see, for example, Patent Document 1).

Further, conventionally, rotation detectors are installed in each of the motor and the speed reducer in the drive device, and the slip of the drive belt is detected by the difference between the detected values (see Patent Document 2).

JP-A-2007-217090 Japanese Patent No. 3330543

In the conventional technology of installing a rotation detector in the speed reducer to monitor the speed, in order to reliably detect the abnormality of the speed, at the time of starting, in consideration of the rise of the speed, it is attempted to detect the abnormality after a lapse of a predetermined time. , It is difficult to immediately detect the slip of the drive belt that occurs at startup. Further, if the abnormality determination criteria are tightened in order to detect an abnormality in speed immediately, the number of false detections of abnormality increases, and the reliability of abnormality detection decreases.

Further, in the technique of detecting slip by using the rotation detectors provided in each of the motor and the speed reducer, the configuration of the drive device becomes complicated.

Therefore, the present invention provides a passenger conveyor capable of detecting an abnormality immediately and with high reliability at the time of start-up without complicating the configuration of the drive device.

In order to solve the above problems, the passenger conveyor according to the present invention is endlessly connected to a plurality of steps that move between the entrance and the exit, and a moving handrail that moves in synchronization with the plurality of steps. , A drive device having a speed reducer and a motor connected to the input side rotation shaft of the reducer via a first endless cord, and a second endless cord on the output side rotation shaft of the reducer. A sprocket that is connected via a speed reducer and transmits the driving force from the reducer to the step, and a moving handrail drive that is connected to the sprocket via a third endless cord and drives the moving handrail by the power from the reducer. A device, including a speed reducer shaft rotation detector provided on the input side rotation shaft of the reducer, a moving handrail rotation detector provided for the moving handrail, and a speed reducer shaft rotation detector at startup. A control device for determining an abnormality in the operation of the drive device and the moving handrail based on the detection signal and the detection signal of the moving handrail rotation detector is provided.

Further, in order to solve the above problems, the passenger conveyor according to the present invention is provided in a plurality of steps which are connected in an endless manner and move between the entrance and the exit, and a plurality of steps provided on both sides of the plurality of steps. A drive device having a pair of moving handrails that move in synchronization with the steps, a motor connected to the input side rotation shaft of the reducer via a speed reducer and a first endless cord, and a speed reducer. A sprocket that is connected to the output side rotation shaft of the above via a second endless cord and transmits the driving force from the reducer to the step, and is connected to the sprocket via a third endless cord. A moving handrail drive device for driving a pair of moving handrails by power from the speed reducer is provided, and a first rotation detector provided on the input side rotation shaft of the speed reducer and a pair of moving handrails are provided. A second rotation detector and a third rotation detector provided for one and the other, and a detection signal of the first rotation detector and a detection signal of the second rotation detector at startup. And a control device for determining an abnormality in the operation of the drive device and the moving handrail based on the signal of the third rotation detector.

According to the present invention, it is possible to detect an abnormality immediately and with high reliability at startup without complicating the configuration of the drive device.

Issues, configurations and effects other than those described above will be clarified by the description of the following embodiments.

It is a schematic side sectional view which shows the whole structure of the escalator which is one Embodiment. It is a block diagram which shows the structure of the control system and the drive system in embodiment. It is a flowchart which shows the operation of the control device 13.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, those having the same reference number indicate the same constituent requirements or constituent requirements having similar functions.

FIG. 1 is a schematic side sectional view showing an overall configuration of an escalator according to an embodiment of the present invention.

As shown in FIG. 1, the escalator of the present embodiment has a plurality of steps 1 connected to an endless step chain 6 and a movement arranged on both the left and right sides of each step 1 and moving in synchronization with each step 1. It includes a handrail 2 and a balustrade 3 that supports the moving handrail 2. Each step 1 is movably arranged as a moving path connecting the entrance floor plate 4 serving as the upper entrance / exit and the exit floor plate 5 serving as the lower entrance / exit. The balustrade 3 is erected on the skirt portion 14.

In the moving region of each step 1, the driven sprocket 7 and the driving sprocket 8 are rotatably arranged apart from each other. A step chain 6 that connects each step 1 in an endless manner is wound around the driven sprocket 7 and the driving sprocket 8. A drive device 11 having a motor 9 and a speed reducer 10 is arranged in the vicinity of the drive sprocket 8. The drive sprocket 8 is connected to the drive device 11 via a drive chain 12 which is an endless cord-like body. Further, a control device 13 for controlling the drive device 11 is arranged in the vicinity of the drive device 11.

When the motor 9 is rotated under the control of the control device 13, the rotation speed of the motor 9 is decelerated by the speed reducer 10, and the rotation output of the speed reducer 10 is transmitted to the drive sprocket 8 via the drive chain 12. As a result, each step 1 moves in the ascending direction or the descending direction. Further, when the driving force is transmitted from the drive sprocket 8 to the moving handrail driving device 16 via the moving handrail driving chain 15 which is an endless cord, the moving handrail 2 synchronizes with the movement of step 1. Move in the ascending or descending direction. Each step 1 transports passengers from the entrance floor plate 4 to the exit floor plate 5 during the descending operation, and conveys passengers from the exit floor plate 5 to the entrance floor plate 4 during the ascending operation by synchronous movement with the moving handrail 2. do.

In FIG. 1, among the boarding / alighting boards (4,5), the boarding / alighting board on the upper floor side is referred to as "boarding board 4", and the boarding / alighting board on the lower floor side is referred to as "boarding board 5". ..

FIG. 2 is a configuration diagram showing a configuration of a control system and a drive system in the escalator according to the present embodiment. In FIG. 2, the control system includes a control device 13, an electromagnetic contactor 20, and a speed reducer brake 17.

In the present embodiment, the control device 13 is composed of a computer including an information processing device such as a CPU (Central Processing Unit), a memory, and an input / output interface (all of which are not shown). The control device 13 functions as an operation control unit 18 and a drive device abnormality determination unit 19, which will be described later, by executing a control program stored in the memory by the CPU.

The operation control unit 18 controls the entire operation of the control device 13 and manages the magnetic contactor 20 and the speed reducer brake 17 as control targets. Further, the operation control unit 18 outputs a start / stop command to the magnetic contactor 20 based on the determination result of the drive device abnormality determination unit 19, and also outputs a brake release / shutoff command to the speed reducer brake 17. do. When the operation control unit 18 obtains an abnormality determination result from the drive device abnormality determination unit 19, it outputs a stop command to the electromagnetic contactor 20 to shut off the motor power supply (building three-phase power supply 30 in FIG. 2). , A brake cutoff command is output to the speed reducer brake 17 to cut off the power supply to the speed reducer brake 17. As a result, the motor 9 is stopped and the speed reducer brake 17 is put into a braking state.

The drive device abnormality determination unit 19 inputs rotation signals from each of the speed reducer shaft rotation detector 22 and the moving handrail rotation detector 23, determines whether or not these rotation detectors have not detected rotation, and controls the operation of the determination result. Output to unit 18. As each rotation detector, for example, a rotary encoder is applied.

The moving handrail rotation detector 23 is provided for each of the pair of left and right moving handrails 2. Therefore, the drive device abnormality determination unit 19 acquires rotation signals from each of the pair of moving handrail rotation detectors. Hereinafter, the moving handrail rotation detector 23 provided for the left and right moving handrails in the moving direction of step 1 will be referred to as a left moving handrail rotation detector and a right moving handrail rotation detector, respectively.

The rotation shaft of the motor 9 is connected to the input side rotation shaft of the speed reducer 10 via a drive belt 21 which is an endless cord-like body. The output side rotation shaft of the speed reducer 10 is connected to the sprocket 8 via the drive chain 12. Therefore, the driving force from the speed reducer 10 is transmitted to step 1 via the output side rotating shaft of the speed reducer 10, the drive chain 12, and the sprocket 8. Further, the driving force from the speed reducer 10 is applied to the moving handrail driving device 16 by driving the moving handrail driving device 16 via the output side rotating shaft of the speed reducer 10, the driving chain 12, the sprocket 8, and the moving handrail driving chain 15. Is transmitted to. The speed reducer brake 17 operates so as to stop the rotation of the speed reducer 10 in response to a brake operation command from the operation control unit 18.

FIG. 3 is a flowchart showing the operation of the control device 13.

When the escalator, for example, the key switch is operated to start activation (processing step S1), the control device 13 outputs an operation command to the magnetic contactor 20 by the operation control unit 18 (processing step S2). As a result, the magnetic contactor 20 closes the contacts, so that the electric power from the power source is supplied to the motor 9 and the speed reducer brake 17. At this time, if the drive device 11 is normal, the speed reducer brake 17 is released and the motor 9 is operated at a constant rotation speed.

In the process of completing the activation of the escalator, the control device 13 determines whether or not 5 seconds have elapsed from the start of activation (processing step S3). When the determination result is negative (NO), the control device 13 repeats the determination process in the process step S3, and when the determination result is affirmative (YES), the control device 13 then executes the process step S4. In the process step S3, the control device 13 avoids the transient state immediately after the start-up and inputs the rotation signal of each rotation detector, so that the reliability of each input rotation signal is improved.

In the process step S4, the control device 13 determines whether the left side moving handrail rotation detector has not detected the rotation. If the determination result is affirmative (YES), the control device 13 then executes the process step S5, and if the determination result is negative (NO), the control device 13 then executes the process step S9.

In the process step S5, the control device 13 determines whether or not the rotation of the right-side moving handrail rotation detector has not been detected. If the determination result is affirmative (YES), the control device 13 then executes the process step S6, and if the determination result is negative (NO), the control device 13 then executes the process step S10.

In the process step S6, the control device 13 determines whether the speed reducer shaft rotation detector 22 has not detected the rotation. If the determination result is affirmative (YES), the control device 13 then executes the process step S7, and if the determination result is negative (NO), the control device 13 then executes the process step S10.

In the process step S7, the control device 13 detects the abnormality of the drive device 11 by the drive device abnormality determination unit 19, and outputs the determination result of the abnormality detection to the operation control unit 18. After executing the processing step S7, the control device 13 executes the processing step S8.

In the process step S8, the control device 13 outputs a stop command to the magnetic contactor 20 on condition that the operation control unit 18 receives the determination result of the drive device abnormality detection from the drive device abnormality determination unit 19. .. When the magnetic contactor 20 receives a stop command, it shuts off the power supply of the motor 9. Further, the control device 13 outputs a stop command to the speed reducer brake 17 by the operation control unit 18. When the speed reducer brake 17 receives a stop command, the speed reducer brake 17 changes from the open state to the braking state. Further, the control device 13 makes the escalator in a non-restartable state by the operation control unit 18. As a result, the start operation by the key switch or the like is invalidated, and the escalator does not restart even if the start operation is performed.

In this way, when both the left and right moving handrail rotation detectors have not detected rotation and the speed reducer shaft rotation detector has not detected rotation, the control device 13 determines that the drive device 11 is abnormal, and determines that the drive device 11 is abnormal. Based on this determination result, the escalator is stopped to make it impossible to restart.

If the determination result in the process step S4 is negative (NO), the control device 13 determines in the process step S9 whether the right-hand handrail rotation detector has not detected the rotation. In the processing step S9, if the determination result is affirmative (YES), the control device 13 then executes the processing step S10, and if the determination result is negative (NO), the control device 13 then executes the processing step S13.

In the processing step S10, as described above, the determination result in the processing step S5 is negative (NO), the determination result in the processing step S6 is negative (NO), and the determination result in the processing step S9 is affirmative. Executed when (YES). That is, in the processing step S10, among the moving handrail rotation detectors on both the left and right sides, when one moving handrail rotation detector has not detected rotation and the other moving handrail rotation detector has rotation detection, or both. It is executed when the rotation of the moving handrail rotation detector is not detected and the speed reducer shaft rotation detector is rotation detection.

In the process step S10, the control device 13 determines whether or not one or both of the left and right moving handrail rotation detectors have not detected rotation even after 10 seconds have passed from the start of activation. If the determination result is negative (NO), the control device 13 then executes the processing step S13, and if the determination result is affirmative (YES), then the processing step S11 is executed. According to the process step S10, since it is determined that the drive device 11 is substantially normal at the time of executing this step, the escalator can be stopped at a normal rated speed.

In the process step S11, the control device 13 detects the abnormality of the moving handrail 2 by the drive device abnormality determination unit 19, and outputs the determination result of the abnormality detection to the operation control unit 18. After executing the processing step S11, the control device 13 executes the processing step S12.

In the process step S12, the control device 13 outputs a stop command to the magnetic contactor 20 on condition that the operation control unit 18 receives the determination result of the moving handrail abnormality detection from the drive device abnormality determination unit 19. .. When the magnetic contactor 20 receives a stop command, it shuts off the power supply of the motor 9. Further, the control device 13 outputs a stop command to the speed reducer brake 17 by the operation control unit 18. When the speed reducer brake 17 receives a stop command, the speed reducer brake 17 changes from the open state to the braking state. However, unlike the processing step S8, the control device 13 makes the escalator restartable by the operation control unit 18. As a result, when the activation operation by the key switch or the like is performed again, the control device 13 starts the activation process again by the operation control unit 18.

In this way, among the moving handrail rotation detectors on both the left and right sides, when one moving handrail rotation detector has not detected rotation and the other moving handrail rotation detector has rotation detection, and both moving handrail rotations. When the detector has not detected the rotation and the speed reducer shaft rotation detector has detected the rotation, the control device 13 determines that the drive device 11 is operating but the moving handrail 2 is abnormal, and this is determined. Based on the judgment result, the escalator is stopped, but it can be restarted.

As described above, the processing step S13 is executed when the determination result in the processing step S4 is negative (NO) and the determination result in the processing step S9 is negative (NO). That is, the processing step S13 is executed when both the left and right moving handrail rotation detectors are rotation detection.

In the process step S13, the control device 13 normally completes the start-up operation and continues the operation of the escalator.

As described above, when both the left and right moving handrail rotation detectors are rotation detection, the control device 13 starts the escalator and continuously operates, assuming that the driving device 11 and the moving handrail 2 are operating normally. do.

According to the present embodiment, the drive device and the movement are based on the detection signal of the rotation detector provided on the rotation shaft of the speed reducer and the detection signal of the rotation detector provided on the moving handrail and rotating when the moving handrail moves. Since the operation abnormality of the handrail is determined, the abnormality can be detected immediately and with high reliability at the time of starting without complicating the configuration of the drive device. As a result, the escalator can be safely stopped even if an operation abnormality occurs in the drive system due to belt slip or the like at the time of starting. Further, the abnormality of the driving device and the moving handrail can be discriminated and determined. As a result, if the drive device is abnormal, it cannot be restarted, and if the moving handrail is abnormal, it can be restarted. Therefore, safety can be improved and a decrease in convenience can be suppressed.

Further, rotation detectors are provided on both the moving handrails located on the left and right sides of step 1, and the drive device and the drive device and the reduction gear shaft rotation detector 22 provided on the rotation shaft of the reduction gear are used to detect an abnormality. False detection of abnormalities on the moving handrail can be suppressed, and the accuracy of abnormality detection can be improved.

The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

For example, the drive system abnormality detecting means in the above-described embodiment can be applied not only to an escalator but also to a passenger conveyor including a moving walkway.

The control system is not limited to a computer, and may be configured by using FPGA or ASIC. Further, programs, table data, files and the like used by the control system can be recorded in various recording devices such as semiconductor memory, hard disk, SSD (Solid State Drive), IC card, SD card and DVD.

1 step, 2 moving handrail, 3 railing, 4 entrance floor plate, 5 exit floor plate, 6 step chain, 7 driven sprocket, 8 drive sprocket, 9 motor, 10 reducer, 11 drive device, 12 drive chain, 13 control device , 14 sprocket part, 15 moving handrail drive chain, 16 moving handrail drive device, 17 reducer brake, 18 operation control part, 19 drive device abnormality judgment unit, 20 electromagnetic contactor, 21 drive belt, 22 reducer shaft rotation detector, 23 Mobile railing rotation detector, 30 Building three-phase power supply

Claims (9)

Multiple steps that are connected endlessly and move between the entrance and exit,
A moving handrail provided on both sides of the plurality of steps and moving in synchronization with the plurality of steps.
A drive device having a speed reducer and a motor connected to an input side rotation shaft of the speed reducer via a first endless cord-like body, and
A sprocket that is connected to the output side rotation shaft of the speed reducer via a second endless cord-like body and transmits the driving force from the speed reducer to the step.
A moving handrail driving device that is connected to the sprocket via a third endless cord-like body and drives the moving handrail by power from the speed reducer.
In a passenger conveyor equipped with
A speed reducer shaft rotation detector provided on the input side rotation shaft of the speed reducer, and
A moving handrail rotation detector provided for the moving handrail and
At startup, a control device that determines an abnormality in the operation of the drive device and the moving handrail based on the detection signal of the speed reducer shaft rotation detector and the detection signal of the moving handrail rotation detector.
A passenger conveyor characterized by being equipped with. In the passenger conveyor according to claim 1,
When the control device determines that the drive device is abnormal, the passenger conveyor is stopped so that it cannot be restarted, and when it determines that the moving handrail is abnormal, the passenger conveyor is stopped so that it can be restarted. A passenger conveyor featuring. Multiple steps that are connected endlessly and move between the entrance and exit,
A pair of moving handrails provided on both sides of the plurality of steps and moving in synchronization with the plurality of steps.
A drive device having a speed reducer and a motor connected to an input side rotation shaft of the speed reducer via a first endless cord-like body, and
A sprocket that is connected to the output side rotation shaft of the speed reducer via a second endless cord-like body and transmits the driving force from the speed reducer to the step.
A moving handrail driving device that is connected to the sprocket via a third endless cord-like body and drives the pair of moving handrails by power from the speed reducer.
In a passenger conveyor equipped with
A first rotation detector provided on the input side rotation shaft of the speed reducer, and
A second rotation detector and a third rotation detector provided for one and the other of the pair of moving handrails,
At startup, the operation of the driving device and the moving handrail is based on the detection signal of the first rotation detector, the detection signal of the second rotation detector, and the signal of the third rotation detector. And the control device that determines the abnormality of
A passenger conveyor characterized by being equipped with. In the passenger conveyor according to claim 3,
In the control device, when both the second rotation detector and the third rotation detector have not detected rotation and the first rotation detector has not detected rotation, the drive device is abnormal. A passenger conveyor characterized by determining that there is. In the passenger conveyor according to claim 4.
The control device is characterized in that, when it is determined that the drive device is abnormal, the passenger conveyor is stopped so that it cannot be restarted. In the passenger conveyor according to claim 3,
The control device is characterized in that when one of the second rotation detector and the third rotation detector has not detected rotation and the other has detected rotation, the moving handrail is determined to be abnormal. Passenger conveyor. In the passenger conveyor according to claim 3,
In the control device, when both the second rotation detector and the third rotation detector have not detected rotation and the first rotation detector has detected rotation, the moving handrail is abnormal. A passenger conveyor characterized by determining that. In the passenger conveyor according to claim 6 or 7.
A passenger conveyor, characterized in that, when the control device determines that the moving handrail is abnormal, the passenger conveyor is stopped and restartable. In the passenger conveyor according to claim 3,
The control device is a passenger conveyor characterized in that when both the second rotation detector and the third rotation detector are rotation detection, the passenger conveyor is started and continuously operated.

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