Passenger conveyor

Abstract

To provide a passenger conveyor that can conserve energy when re-accelerating. [Solution] The passenger conveyor comprises a plurality of steps connected in an endless manner, a step chain connecting the plurality of steps, a drive sprocket around which the step chain is wound, a drive unit 10, and a drive force interruption mechanism 34. The drive unit 10 rotates the drive sprocket. The drive force interruption mechanism 34 is provided between the drive sprocket and the drive unit and transmits the rotational force from the drive unit 10 in a connectable and disconnectable manner.

Description

Technical Field

[0001] The present invention relates to a passenger conveyor.

Background Art

[0002] A passenger conveyor includes a plurality of steps that move in a cycle, a handrail (handrail) that moves in synchronization with the plurality of steps, a railing panel that supports the handrail movably, and a deck portion that supports the railing panel.

[0003] As such a passenger conveyor, for example, there is one described in Patent Document 1. Patent Document 1 describes a technology including a main circuit portion including an inverter portion and an inverter control portion that controls the inverter portion, an electric motor driven by the inverter portion, a brake device that brakes the electric motor, and at least a control circuit portion that controls the brake device. And, it is operated by an electric motor, stopped at a predetermined deceleration when stopped, and during a power failure, the electric motor is decelerated and driven by regenerative power generated by the electric motor. Also, during a power failure, the power supply of the inverter control portion is supplied by regenerative power, and a power storage device that supplies power to the control circuit portion during a power failure by power stored in a capacitor is described.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the technology described in Patent Document 1, sufficient regenerative power could not be obtained in an unloaded state when passengers were not standing on the steps, and when stopping the passenger conveyor, the braking force of the brakes and the resistance of the passenger conveyor itself were lost as thermal energy in the drive unit. Therefore, in the technology described in Patent Document 1, a large amount of power was required to re-accelerate from a stopped state, making it difficult to save energy.

[0006] The objective of this project is to provide a passenger conveyor that can conserve energy during re-acceleration, taking into consideration the problems mentioned above. [Means for solving the problem]

[0007] To solve the above problems and achieve the objective, a passenger conveyor reflecting one aspect of the present invention comprises a plurality of steps connected in an endless manner, a step chain connecting the plurality of steps, a drive sprocket around which the step chain is wound, a drive unit, and a drive force interruption mechanism. The drive unit rotates the drive sprocket. The drive force interruption mechanism is provided between the drive sprocket and the drive unit and transmits the rotational force from the drive unit in a connectable and interruptible manner. [Effects of the Invention]

[0008] According to the passenger conveyor configuration described above, energy savings can be achieved when the train restarts after coming to a complete stop. Furthermore, issues, configurations, and effects other than those mentioned above will be clarified by the following description of the embodiments. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic diagram showing an example configuration of a passenger conveyor according to an embodiment. [Figure 2] This is a front view showing the drive mechanism of a passenger conveyor according to an embodiment. [Figure 3] This is a side view showing the drive mechanism of a passenger conveyor according to an embodiment. [Figure 4]This is a block diagram showing an example of the configuration of a control system in a passenger conveyor according to an embodiment. [Figure 5] This flowchart shows an example of the operation of a passenger conveyor according to an embodiment. [Figure 6] This is an explanatory diagram illustrating the difference between the operation of the drive device of a passenger conveyor according to an embodiment and the operation of the drive device according to a conventional example. [Figure 7] This is a time chart showing the operation of the drive unit of a passenger conveyor according to an embodiment example and an example of the operation of the drive unit in automatic operation mode according to a conventional example. [Modes for carrying out the invention]

[0010] The passenger conveyor according to the embodiment will be described below with reference to Figures 1 to 7. Note that common components in each figure are denoted by the same reference numerals.

[0011] 1. Example of an Embodiment [Example of passenger conveyor configuration] First, the configuration of the passenger conveyor according to this embodiment (hereinafter referred to as "this example") will be described with reference to Figure 1. Figure 1 is a schematic diagram showing an example of the configuration of the passenger conveyor in this example.

[0012] As shown in Figure 1, the passenger conveyor 1 in this example is an inclined passenger conveyor, a so-called escalator, installed between the lower floor 3 and the upper floor 4 of a building structure. The passenger conveyor 1 comprises a railing section 2, multiple steps 5, a drive unit 10, an upper sprocket 11, a lower sprocket 12, and a step chain 13. The passenger conveyor 1 also includes an upper boarding / alighting platform 14, a lower boarding / alighting platform 15, a guide rail 51, a photoelectric pole 53, and a passenger sensor 55.

[0013] The frame of passenger conveyor 1 is installed spanning the lower floor 3 and the upper floor 4. Hereinafter, the direction extending from the lower floor to the upper floor of the frame will be referred to as the longitudinal direction. The direction perpendicular to both the longitudinal and vertical directions of the frame will be referred to as the width direction.

[0014] On the upper horizontal section formed on the upper floor 4 side in the longitudinal direction of the frame body and the lower horizontal section formed on the lower floor 3 side, an upper boarding floor 14 and a lower boarding floor 15 are installed. Further, below the upper boarding floor 14, a driving device 10 and an upper sprocket 11 indicating a driving sprocket are arranged. Below the lower boarding floor 15, a lower sprocket 12 is arranged.

[0015] A transmission chain 9 is wound around the upper sprocket 11 and a transmission sprocket 8 of the driving device 10 described later. Then, the upper sprocket 11 is rotationally driven by the rotational force transmitted from the transmission sprocket 8 of the driving device 10 via the transmission chain 9. A tread chain 13 is wound around the upper sprocket 11 and the lower sprocket 12. Then, when the upper sprocket 11 rotates, the lower sprocket 12 and the tread chain 13 rotate.

[0016] Further, a guide member (not shown) is provided on the frame body. The plurality of treads 5 are movably guided by a guide member (not shown). Also, the plurality of treads 5 are connected in an endless manner via the tread chain 13. The plurality of treads 5 are guided by a guide member attached to the frame body and circulate between the going and returning sides between the boarding and alighting openings on the upper and lower floors. The passenger rides on the tread 5 moving on the going side and is transported. The passenger rides on the tread 5 moving on the going side and is transported. Also, the tread 5 circulates between the upper floor 4 and the lower floor 3 when the driving device 10 is driven.

[0017] The railing part 2 is supported on the upper part of the frame body and is arranged on both sides in the width direction of the frame body. An endless moving handrail is provided movably on the peripheral edge of the railing part 2. The moving handrail is movably supported by the railing part 2. Then, the moving handrail is driven by a handrail driving part (not shown) and circulates between the going and returning sides in the same direction as and in synchronization with the plurality of treads 5.

[0018] In addition, on the upper surface portions of the upper boarding and alighting floor 14 and the lower boarding and alighting floor 15, a guiding fence 51, a photoelectric pole 53, and a passenger sensor 55 are provided. The guiding fence 51 is arranged on both sides in the width direction of the upper boarding and alighting floor 14 and the lower boarding and alighting floor 15. That is, the guiding fence 51 is arranged at the boarding and alighting opening of the passenger conveyor 1 and guides passengers to a plurality of steps 5. At the entrance and exit of the boarding and alighting opening in the guiding fence 51, a pair of photoelectric poles 53 are erected.

[0019] The photoelectric pole 53 is provided with a passenger sensor 55. The passenger sensor 55 detects passengers using the passenger conveyor 1. Then, the passenger sensor 55 outputs the detected signal to a control device 101 described later. Note that the passenger sensor 55 may be provided on at least one of the lower floor 3 and the upper floor 4, that is, it may be provided on the entrance side of the passenger conveyor 1.

[0020] [Drive mechanism] Next, the drive device 10 will be described with reference to FIGS. 2 to 3. FIG. 2 is a front view showing the drive device 10, and FIG. 3 is a side view of the drive device 10.

[0021] As shown in FIGS. 2 to 3, the drive device 10 includes a motor 6, a speed reducer 7, a flywheel 23, a belt member 27, a brake 32, and a clutch 34 showing a driving force interruption mechanism.

[0022] The motor 6 is fixed to the upper surface portion in the vertical direction of the speed reducer 7 via a leg portion 31. The motor 6 has a drive shaft 21 and a drive pulley 22. The drive shaft 21 is provided at one end portion in the axial direction of the motor 6. The drive pulley 22 is connected to the drive shaft 21. The belt member 27 is wound around the drive pulley 22.

[0023] Furthermore, a substantially disc-shaped flywheel 23 is provided on the drive shaft 21. The flywheel 23 is arranged concentrically with the drive pulley 22 with respect to the drive shaft 21 and rotates together with the drive shaft 21 and the drive pulley 22. Here, the passenger conveyor 1 needs to be equipped with a brake 32 that has a large braking force so that the steps 5 do not reverse (descend) even when it is fully loaded with passengers. However, when there are few passengers, the inertial force from the passengers is small, and when the brake is applied, the steps 5 come to a sudden stop, posing a risk of passengers falling. To prevent this sudden stop of the steps 5, the motor 6 is equipped with a large flywheel 23 to increase the inertial force of the equipment itself. In this way, the flywheel 23 increases the inertial force, smoothing out fluctuations in the torque applied to the drive pulley 22 and stabilizing the rotation of the drive pulley 22.

[0024] Next, we will explain the gearbox 7. The reduction gear 7 includes a transmission sprocket 8, a driven shaft 25, and a driven pulley 26. The transmission sprocket 8 and the driven pulley 26 are rotatably mounted on one surface of the reduction gear 7. The driven pulley 26 is mounted on one surface of the reduction gear 7 via the driven shaft 25. A belt member 27 is wrapped around the driven pulley 26. Rotational force from the drive pulley 22 is transmitted to the driven pulley 26 via the belt member 27.

[0025] Furthermore, a clutch 34 is provided on the driven shaft 25 of the reduction gear 7. The clutch 34 connects or disconnects the driven shaft 25 based on a control signal from the control device 101, which will be described later. When the clutch 34 is connected, rotational force from the drive pulley 22 is transmitted (input) to the reduction gear 7 via the belt member 27. The reduction gear 7 then reduces the rotational force of the motor 6 and outputs it from the transmission sprocket 8. As described above, a transmission chain 9 is wrapped around the transmission sprocket 8. Therefore, the rotational force of the drive device 10 is transmitted to the upper sprocket 11 via the transmission chain 9.

[0026] Furthermore, when the clutch 34 is disengaged (released), the rotational force from the drive pulley 22 is not transmitted to the reduction gear 7 via the belt member 27. Therefore, the drive shaft 21 of the motor 6, the drive pulley 22, and the flywheel 23 rotate independently of the reduction gear 7.

[0027] Furthermore, the reduction gear 7 is equipped with a brake 32. The brake 32 slows the rotation of the reduction gear 7 based on a control signal from the control device 101, which will be described later. When the brake 32 is in operation, the rotational movement of the motor 6 and the reduction gear 7 is slowed, and the rotation of the transmission sprocket 8 stops.

[0028] [Example of control system configuration] Next, the configuration of the control system for the passenger conveyor 1 will be explained with reference to Figure 4. Figure 4 is a block diagram showing an example of the configuration of the control system for the passenger conveyor 1.

[0029] As shown in Figure 4, the passenger conveyor 1 includes a passenger sensor 55 installed at the entrance / exit, a control device 101, and a drive device 10. The control device 101, like the drive device 10, is positioned, for example, below the upper entrance / exit floor 14. The control device 101 consists of, for example, a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), etc. The CPU reads various processing programs stored in ROM and loads them into RAM.

[0030] The control device 101 is connected to the passenger sensor 55 and the drive unit 10 so as to be able to send and receive information. The control device 101 also includes an operation control unit 102, a motor control unit 103, a brake control unit 104, and a clutch control unit 105.

[0031] The operation control unit 102 controls the operation of the entire passenger conveyor 1. The operation control unit 102 is connected to the passenger sensor 55. When the passenger sensor 55 detects a passenger, it outputs a passenger detection signal to the operation control unit 102. The operation control unit 102 is connected to the motor control unit 103, the brake control unit 104, and the clutch control unit 105. When the operation control unit 102 receives a passenger detection signal from the passenger sensor 55, it controls the motor control unit 103, the brake control unit 104, and the clutch control unit 105.

[0032] The motor control unit 103 is connected to the motor 6 of the drive unit 10. The motor control unit 103 controls the operation of the motor 6 based on control commands from the operation control unit 102. Specifically, the motor control unit 103 controls the output of the motor 6 and controls the acceleration and deceleration of the rotational speed of the motor 6.

[0033] The brake control unit 104 is connected to the brake 32 of the drive unit 10. Based on control commands from the driving control unit 102, the brake control unit 104 controls the operation of the brake 32, i.e., the ON / OFF state of the brake 32.

[0034] The clutch control unit 105 is connected to the clutch 34 of the drive unit 10. Based on control commands from the driving control unit 102, the clutch control unit 105 controls the operation of the clutch 34, that is, the ON (connect) / OFF (disconnect / release) of the clutch 34.

[0035] 2. Example of passenger conveyor operation Next, an example of the operation of the passenger conveyor 1 having the above-described configuration will be explained with reference to Figures 5 to 7. Figure 5 is a flowchart showing an example of the operation of passenger conveyor 1. Figure 6 is an explanatory diagram showing the difference between the operation of the drive unit of the passenger conveyor in this example and the operation of the drive unit of the passenger conveyor in a conventional example. Figure 7 is a time chart showing an example of the operation of the automatic operation mode of passenger conveyor 1 in this example and an example of the operation of the automatic operation mode of the passenger conveyor in a conventional example.

[0036] As shown in Figure 5, first the control device 101 stops the drive unit 10 and performs standby operation (step S11). At this time, the clutch 34 is controlled by the clutch control unit 105 of the control device 101, and the connection to the driven shaft 25 is disconnected. Next, the operation control unit 102 determines whether or not the passenger sensor 55 has detected a passenger (step S12). In the process of step S12, if the control device 101 determines that the passenger sensor 55 has not detected a passenger (NO determination in step S12), it returns to the process of step S11 and continues standby operation.

[0037] In response, if the passenger sensor 55 detects a passenger (YES determination in step S12), the motor 6 of the drive unit 10 is driven via the motor control unit 103. The clutch control unit 105 controls the clutch 34 and connects the driven shaft 25. As a result, the rotational force of the motor 6 is transmitted to the reduction gear 7, which rotates the upper sprocket 11 and lower sprocket 12 and the step chain 13, accelerating the multiple steps 5 to the rated speed (step S13). Next, the operation control unit 102 controls the motor 6 of the drive unit 10 via the motor control unit 103, driving the multiple steps 5 at the rated speed for a preset passenger usage time (step S15). Here, the passenger usage time is, for example, the time from when a passenger boards the passenger conveyor 1 until they exit from the exit. When the passenger usage time is reached, the operation control unit 102 drives the multiple steps 5 at the rated speed for a buffer time (step S16). This buffer time ensures that the steps are driven at the rated speed until the passenger has completely exited the passenger conveyor 1.

[0038] Next, the operation control unit 102 determines whether or not the passenger sensor 55 has detected a passenger (step S17). In the process of step S17, if the control device 101 determines that the passenger sensor 55 has detected a passenger (YES determination in step S17), it returns to the process of step S15 and continues operation at the rated speed.

[0039] In response, if the control device 101 determines that the passenger sensor 55 has not detected a passenger (NO determination in step S17), it controls the drive unit 10 to perform deceleration operation (step S18). In the process of step S18, the motor control unit 103 of the control device 101 stops the drive of the motor 6. Furthermore, the clutch control unit 105 of the control device 101 controls the clutch 34 and disconnects the clutch 34. As a result, the rotational force from the motor 6 is not transmitted to the reduction gear 7 or the transmission sprocket 8. Consequently, the reduction gear 7, the transmission sprocket 8, the upper sprocket 11, the lower sprocket 12, the step chain 13, and the multiple steps 5 are decelerated by inertia.

[0040] Next, the control device 101 determines whether the operation of the passenger conveyor 1 has completely ended based on the actions of the building manager or other person in charge of the building structure where the passenger conveyor 1 is installed (step S19). In the process of step S19, if the control device 101 determines that the operation of the passenger conveyor 1 will continue (NO determination in step S19), it returns to the process of step S11 and performs standby operation. On the other hand, if the control device 101 determines that the operation of the passenger conveyor 1 has completely ended (YES determination in step S19), the control device 101 stops supplying power to the drive unit 10. As a result, the operation of the passenger conveyor 1 ends.

[0041] Next, referring to Figures 6 and 7, we will explain the differences in the operation of the drive system in the automatic driving mode of the passenger conveyor 1 in this example and the conventional passenger conveyor.

[0042] As shown in Figure 7, when the passenger sensor 55 detects a passenger from a state where the step 5 has come to a complete stop, the motor 6 is driven in both the passenger conveyor 1 in this example and the passenger conveyor in the conventional example, and the step 5 accelerates to its rated speed. Once it has accelerated to its rated speed, the motor 6 operates at a constant speed. In the passenger conveyor 1 in this example, the clutch 34 is engaged, and the rotational force of the motor 6 is transmitted to the reduction gear. Therefore, as shown in Figure 6A, during normal operation, the rotational force of the motor 6 is transmitted to the driven pulley 26 of the reduction gear 7 in both the passenger conveyor 1 in this example and the passenger conveyor in the conventional example, causing the transmission sprocket 8 to rotate.

[0043] Furthermore, if the drive unit 10 operates for a predetermined time and the passenger sensor 55 does not detect any passengers, both the passenger conveyor 1 in this example and the passenger conveyor in the conventional example will decelerate, and the movement of the steps 5 will stop. In the conventional drive unit 10B shown in Figure 6B1, the brakes are applied, and the drive pulley 22 and flywheel 23 of the motor 6, along with the reduction gear 7 and transmission sprocket 8, stop rotating. At this time, the kinetic energy of the flywheel 23 is consumed as heat energy by the braking force of the brakes.

[0044] In contrast, as shown in Figure 6C1, in the drive unit 10 of this example, the clutch 34 is disconnected (released). Therefore, the drive pulley 22 and flywheel 23 of the motor 6 are disconnected from the reduction gear 7, the transmission sprocket 8, and the upper sprocket 11. As a result, as shown in Figures 6C1 and 7, the rotation of the flywheel 23 continues due to its inertial force. The steps 5 and the upper sprocket 11, etc., are decelerated and stopped due to their frictional force, etc.

[0045] In the state shown in Figures 6B1 and 6C1, if the passenger sensor 55 detects a passenger, the motor 6 accelerates again. However, as shown in Figures 6B2 and 7, in the conventional drive unit 10B, it is necessary to accelerate the motor 6 again from a state where the drive pulley 22 and flywheel 23 have come to a complete stop, so a large amount of power is required to re-accelerate the motor 6. Furthermore, in the passenger conveyor according to the conventional example, if the automatic operation mode, which involves repeated starting and stopping as shown in Figures 6 and 7, is performed frequently, a large amount of power is consumed each time it starts up.

[0046] In contrast, in the drive unit 10 of this example, as shown in Figure 6C2, a clutch 34 is connected to the motor 6, and to the reduction gear 7, the transmission sprocket 8, and the upper sprocket 11. Here, the drive pulley 22 and the flywheel 23 continue their rotational motion due to inertia. Therefore, when accelerating the motor 6 again, the inertia (kinetic energy) remaining in the flywheel 23 can be utilized. As a result, when re-accelerating the motor 6, it can be driven with less power than the conventional drive unit 10B. Consequently, kinetic energy can be used efficiently, and energy savings can be achieved in the passenger conveyor 1 even when the automatic operation mode, which involves repeated starting and stopping, is frequently performed.

[0047] The passenger conveyor of the present invention, including its operation and effects, has been described above. However, the passenger conveyor of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the gist of the invention as described in the claims.

[0048] Furthermore, although the above-described embodiment illustrates an example in which a flywheel 23 is provided on the drive shaft 21 of the motor 6, the invention is not limited to this. For example, if the diameters of the drive shaft 21 and drive pulley 22 are relatively large and sufficient inertial force can be obtained from the drive shaft 21 and drive pulley 22, a flywheel 23 may not be necessary.

[0049] Furthermore, although an example in which a reduction gear 7 is provided in the drive unit 10 has been described, the system is not limited to this, and rotational force may be directly transmitted from the drive pulley 22 of the motor 6 to the upper sprocket 11, which represents the drive sprocket, without providing a reduction gear 7. In this case, the clutch 34, which represents the drive force interruption mechanism, only needs to be positioned between the motor 6 and the upper sprocket 11.

[0050] Furthermore, although an example in which the clutch 34 is provided on the driven shaft 25 of the reduction gear 7 has been described, it is not limited to this. The clutch 34 can be located between the motor 6 and the upper sprocket 11; for example, the clutch 34 may be provided on the transmission sprocket 8 of the reduction gear 7. Note that the inside of the reduction gear 7 is filled with highly viscous oil. Therefore, if the clutch 34 is provided on the transmission sprocket 8 of the reduction gear 7, there is a risk that the kinetic energy of the motor 6 will be attenuated by the reduction gear 7 when the vehicle is stopped. As a result, when the drive unit 10 is equipped with a reduction gear 7, the kinetic energy of the motor 6 can be efficiently stored when the vehicle is stopped if the clutch 34 is provided between the motor 6 and the reduction gear 7.

[0051] Furthermore, although an example using a passenger sensor 55 installed on a photoelectric pole 53 has been described, the configuration for detecting passengers is not limited to the passenger sensor 55. Passengers may also be detected from the load applied to the steps 5, the upper boarding / alighting floor 14, or the lower boarding / alighting floor 15, and various other detection methods can be applied. Therefore, it is not necessary to install the guide fence 51, the photoelectric pole 53, or the passenger sensor 55.

[0052] Furthermore, although the above-described embodiment example describes an example applied to a new passenger conveyor 1, it is not limited to this. For example, when refurbishing an existing passenger conveyor, the clutch 34 described above may be installed between the motor 6 and the upper sprocket 11 indicating the drive sprocket.

[0053] In the embodiments described above, an escalator with steps between multiple steps was used as an example of an inclined passenger conveyor. However, the passenger conveyor according to the present invention can also be applied to electric roads, so-called moving walkways, where there are no steps between multiple steps.

[0054] Furthermore, the present invention can also be applied to passenger conveyors having a frame in which at least a portion of the inclined section is provided with sections parallel to the upper horizontal section and the lower horizontal section. Moreover, the present invention can also be applied to passenger conveyors having a frame in which the extension direction of the upper horizontal section and the lower horizontal section differs as the extension direction of the inclined section curves and changes.

[0055] In this specification, although terms such as "parallel" and "orthogonal" are used, these do not mean only strictly "parallel" and "orthogonal," but may also refer to states that are "approximately parallel" or "approximately orthogonal," which include "parallel" and "orthogonal" and are within a range in which they can perform their functions. [Explanation of Symbols]

[0056] 1...Passenger conveyor, 2...Balustrade section, 3...Lower floor, 4...Upper floor, 5...Steps, 6...Motor, 7...Reduction gear, 8...Transmission sprocket, 9...Transmission chain, 10...Drive unit, 11...Upper sprocket, 12...Lower sprocket, 13...Step chain, 14...Upper boarding / alighting floor, 15...Lower boarding / alighting floor, 21...Drive shaft, 22...Drive pulley, 23...Flywheel, 25...Driven shaft, 26...Driven pulley, 27...Belt member, 31...Legs, 32...Brake, 34...Clutch, 51...Guidance fence, 53...Photoelectric pole, 55...Passenger sensor, 101...Control device, 102...Operation control unit, 103...Motor control unit, 104...Brake control unit, 105...Clutch control unit

Claims

1. Multiple steps connected in an endless manner, A step chain connecting multiple steps, The drive sprocket around which the aforementioned step chain is wound, A drive device for rotating the aforementioned drive sprocket, A drive force interruption mechanism is provided between the drive sprocket and the drive device, and transmits rotational force from the drive device in a manner that can connect and disconnect, A passenger conveyor equipped with a [unclear].

2. The aforementioned drive force interruption mechanism interrupts the transmission of rotational force when no passenger is detected, and resumes the transmission of rotational force when a passenger is detected. The passenger conveyor according to claim 1.

3. The drive device is Motor and, The system includes a reduction mechanism that receives rotational force from the motor and transmits the rotational force to the drive sprocket, The drive force interruption mechanism is provided between the motor and the reduction gear. The passenger conveyor according to claim 1.

4. A flywheel is provided on the drive shaft of the motor. The passenger conveyor according to claim 3.

5. A passenger sensor is provided at the entrance / exit to detect the passenger, A control device that controls the drive unit and the drive force cutoff mechanism based on the signal from the passenger sensor, A passenger conveyor according to claim 1, comprising:

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