Safety system of passenger conveyor, passenger conveyor and operation method of passenger conveyor
By introducing a safety system into the passenger conveyor, the length of the strip and the motor current rise rate are detected, and the problem of the strip being clamped and the step damage is solved, and a safe and stable conveyor operation is achieved.
Patent Information
- Application Number
- CN202410774730.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-04
- Filing Date
- 2024-06-17
- Publication Date
- 2025-03-04
AI Technical Summary
In a passenger conveyor, long strips are sandwiched by the rungs and the ceiling may cause the rungs to be bound and thus may be damaged.
A safety system is designed, including a strip object determination unit, an upward rate acquisition unit, an upward rate determination unit and a brake control unit. The system determines whether there is a risk of clamping by detecting the length of the long strips carried by the passenger and the rate of motor current rise, and triggers the brake to stop the cyclic movement of the rung when necessary.
It effectively prevents the steps caused by long objects being clamped, and ensures the safe and stable operation of the passenger conveyor.
Smart Images
Figure CN119551535A_ABST
Abstract
Description
Technical Field
[0001] Embodiments relate to a safety system for a passenger conveyor, a passenger conveyor, and a method for operating a passenger conveyor. Background Art
[0002] There are cases where a passenger carrying a long object gets on a passenger conveyor. If the passenger stops on the steps and places the object vertically on the steps, there is a risk that the upper end of the object will interfere with the ceiling of the building. If the object is caught between the steps and the ceiling, the steps may be bound. If the steps are further driven in this state, there is a possibility that the steps will be damaged. Summary of the invention
[0003] The safety system of the passenger conveyor of the embodiment comprises a long object determination unit, a rising rate acquisition unit, a rising rate determination unit, and a brake control unit. The long object determination unit determines whether a passenger boarding the passenger conveyor is holding a long object having a length longer than a reference length. When the long object determination unit determines that the passenger is holding a long object, the rising rate acquisition unit acquires the rising rate of the motor current of the driving motor that causes the steps to move in a circular motion. When the motor current value of the driving motor reaches a prescribed overload current value, the rising rate determination unit determines whether the motor current rising rate acquired by the rising rate acquisition unit when the motor current value reaches the overload current value is longer than a reference rising rate. When the rising rate determination unit determines that the motor current rising rate is longer than a reference rising rate, the brake control unit actuates the brake to stop the circular motion of the steps.
[0004] The passenger conveyor according to the embodiment includes the above-mentioned safety system for the passenger conveyor.
[0005] The operating method of the passenger conveyor of the implementation mode comprises the following steps: determining whether a passenger boarding the passenger conveyor is holding a long object having a length longer than a reference length; if it is determined that the passenger is holding the long object, obtaining the motor current rise rate of the driving motor that causes the steps to move in a circular motion; if the motor current value of the driving motor reaches a specified overload current value, determining whether the motor current rise rate when the motor current value reaches the overload current value is longer than a reference rise rate; and if it is determined that the motor current rise rate is longer than the reference rise rate, actuating the brake to stop the circular motion of the steps. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 It is a diagram showing the overall schematic configuration of the passenger conveyor according to the present embodiment.
[0007] Figure 2 It is a diagram showing a safety system of a passenger conveyor according to the present embodiment.
[0008] Figure 3 It is used to illustrate Figure 2 FIG. 1 is a diagram of a hall length information acquisition unit shown in FIG.
[0009] Figure 4 It is used to illustrate Figure 2 FIG. 1 is a diagram of a landing length information acquisition unit shown in FIG.
[0010] Figure 5 This is a diagram showing how the motor current value changes when the number of passengers gradually increases.
[0011] Figure 6 This is a diagram showing a state in which a long object held by a passenger is caught between the steps and the ceiling.
[0012] Figure 7 This is a diagram showing how the motor current value changes when a long object held by a passenger is caught between the steps and the ceiling.
[0013] Figure 8 It is a figure which shows the flowchart in the operating method of the passenger conveyor of this embodiment. DETAILED DESCRIPTION
[0014] Hereinafter, a passenger conveyor safety system, a passenger conveyor, and a passenger conveyor operating method according to the present embodiment will be described with reference to the drawings.
[0015] First, refer to Figure 1 , the passenger conveyor 1 of this embodiment will be described. Here, as the passenger conveyor 1, an escalator is taken as an example and described, but the passenger conveyor 1 of this embodiment may also be a moving walkway.
[0016] like Figure 1 As shown, the passenger conveyor 1 includes a plurality of steps 2 , a drive device 3 , a pair of handrails 4 , a pair of skirt boards 5 , a pair of handrail covers 6 , and a pair of handrail belts 7 .
[0017] The steps 2 are connected by an endless step chain 8. The steps 2 are guided by the guide rails 9 and move in a loop between the lower entrance 10 and the upper exit 11. In the present embodiment, the example in which the steps 2 move in the direction from the lower entrance 10 to the upper exit 11 is used for explanation.
[0018] The driving device 3 causes the steps 2 to circulate together with the handrail 7. The driving device 3 may include a driving motor 12 and a speed reducer 13. The driving device 3 is provided with a brake 14. The brake 14 is configured to stop the rotation of the driving motor 12 and maintain the stopped state.
[0019] The structure for causing the step 2 to move cyclically will be described in more detail. Figure 1As shown, a truss 15 is provided under the floor of the building. An upper machine room 16 is provided on the upper side of the truss 15, and a drive sprocket 17 is housed in the upper machine room 16 together with the drive device 3. The rotation of the drive device 3 is transmitted to the drive sprocket 17 through the drive chain 18. A lower machine room 19 is provided on the lower side of the truss 15, and a driven sprocket 20 is housed in the lower machine room 19. The above-mentioned step chain 8 is mounted between the drive sprocket 17 and the driven sprocket 20. If the drive motor 12 of the drive device 3 is driven, the drive sprocket 17 rotates, and the step chain 8 moves in a circulation. In this way, the step 2 moves in a circulation between the boarding entrance 10 and the exit 11 to transport passengers.
[0020] The handrail 4 is vertically arranged on the left and right sides of the step 2. The handrail 4 is formed of a translucent component, such as glass. The handrail 4 extends from the staircase entrance 10 of the lower floor to the staircase exit 11 of the upper floor. The skirt 5 covers the lower part of the corresponding handrail 4. The skirt 5 extends from the staircase entrance 10 toward the staircase exit 11 in the same manner as the handrail 4. The handrail cover 6 extends along the outer peripheral edge of the handrail 4. The handrail cover 6 is sometimes also called a handrail guide rail. The handrail belt 7 moves while being guided by the handrail cover 6. The handrail belt 7 moves in the moving direction D synchronously with the step 2. The handrail belt 7 is mounted on a handrail belt pulley 21 provided in the truss 15. The handrail belt pulley 21 is configured to rotate synchronously with the drive sprocket 17, and the handrail belt 7 circulates through the rotation of the handrail belt pulley 21.
[0021] The handrail cover 6 is provided with a lighting device 22. The lighting device 22 is formed along the handrail cover 6. The skirt board 5 is provided with a speaker 23. The speaker 23 is arranged on the lower floor side and the upper floor side.
[0022] A pair of entrance rods 24 are provided at the entrance 10. A pair of exit rods 25 are provided at the exit 11.
[0023] The passenger conveyor 1 of the present embodiment further includes a safety system 30. Hereinafter, the safety system 30 of the passenger conveyor of the present embodiment will be described.
[0024] like Figure 2 As shown, the safety system 30 may include a landing length information acquisition unit 31 , a landing length information acquisition unit 32 , and a safety device 40 .
[0025] The entrance length information acquisition unit 31 acquires the length information of the luggage held by the passengers who board the passenger conveyor 1. Figure 3 As shown, the landing length information acquisition unit 31 may also include a landing pole camera 33 and a landing ceiling camera 34 .
[0026] The entrance pole camera 33 is an example of a first photographing unit, and may be provided on one entrance pole 24. The entrance pole camera 33 may also be disposed on the upper portion of the entrance pole 24. The entrance pole camera 33 photographs the luggage in a first direction to create an image. For example, the entrance pole camera 33 photographs the luggage from a horizontal direction and obliquely from the front. The front refers to the front of the passenger's traveling direction. The luggage is photographed in the created image, and the image of the luggage includes the length information of the luggage.
[0027] The entrance ceiling camera 34 is an example of a second imaging unit and may be provided on the ceiling 26 of the entrance 10. The entrance ceiling camera 34 photographs the luggage from a second direction different from the first direction to create an image. For example, the entrance ceiling camera 34 photographs the luggage from a vertical direction and from above. The image of the luggage includes the length information of the luggage.
[0028] The landing length information acquisition unit 32 acquires the length information of the luggage held by the passengers who are landing from the passenger conveyor 1. Figure 4 As shown, the landing length information acquisition unit 32 may also include a landing pole camera 35 and a landing ceiling camera 36 .
[0029] The stairwell pole camera 35 is an example of a third photographing unit and may be provided on one of the stairwell poles 25. The stairwell pole camera 35 may also be disposed on the upper portion of the stairwell pole 25. The stairwell pole camera 35 photographs the luggage in a third direction to create an image. For example, the stairwell pole camera 35 photographs the luggage from a horizontal direction and obliquely from the rear. The rear refers to the rear of the passenger's traveling direction. The luggage is photographed in the created image, and the image of the luggage includes the length information of the luggage.
[0030] The landing ceiling camera 36 is an example of a fourth imaging unit and may be provided on the ceiling 26 of the landing 11. The landing ceiling camera 36 photographs the luggage from a fourth direction different from the third direction to create an image. For example, the landing ceiling camera 36 photographs the luggage from a vertical direction and from above. The image of the luggage includes the length information of the luggage.
[0031] Next, the safety device 40 will be described. The safety device 40 may include a long object determination unit 41, a step-down determination unit 42, a current measurement unit 43, a current determination unit 44, an increase rate acquisition unit 45, an increase rate determination unit 46, a brake control unit 47, and a notification unit 49. The safety device 40 may also be assembled in a control device (not shown) of the passenger conveyor 1.
[0032] like Figure 2As shown, the long object determination unit 41 determines whether a passenger boarding the passenger conveyor 1 carries a long object 60 having a length longer than a reference length. For example, the long object determination unit 41 may determine whether the luggage is the long object 60 based on the length information of the luggage acquired by the entrance length information acquisition unit 31. As described above, the long object 60 refers to luggage having a length longer than the reference length.
[0033] The long object determination unit 41 of this embodiment may also calculate the length of the luggage based on the image produced by the entrance pole camera 33 and the image produced by the entrance ceiling camera 34. For example, the actual length of the luggage may be calculated based on the length of the luggage in each image by the three-square theorem.
[0034] In addition, the long object determination unit 41 may compare the calculated length of the luggage with the reference length to determine whether the length of the luggage is greater than the reference length. The long object determination unit 41 may determine that the passenger boarding the passenger conveyor 1 is carrying the long object 60 when the length of the luggage is greater than the reference length. The reference length may be the minimum distance between the step 2 and the ceiling 26 of the passenger conveyor 1. The minimum distance may be a distance perpendicular to the step 2. The reference length may be a value including a margin relative to the minimum distance.
[0035] The descending determination unit 42 determines whether the passenger descending from the passenger conveyor 1 carries the long object 60. For example, the descending determination unit 42 may determine whether the luggage is the long object 60 based on the luggage length information acquired by the descending entrance length information acquisition unit 32.
[0036] The staircase descent determination unit 42 may calculate the length of the luggage based on the image produced by the staircase descent pole camera 35 and the image produced by the staircase descent ceiling camera 36. For example, the actual length of the luggage may be calculated based on the length of the luggage in each image by the three-square theorem.
[0037] In addition, the descending determination unit 42 may compare the calculated length of the luggage with the reference length to determine whether the length of the luggage is greater than the reference length. The descending determination unit 42 may determine that the passenger descending from the passenger conveyor 1 holds the long object 60 when the length of the luggage is greater than the reference length. Thus, the descending determination unit 42 may determine that the passenger holding the long object 60 determined by the long object determination unit 41 has descended from the passenger conveyor 1. The reference length may be equal to the reference length used by the long object determination unit 41 described above.
[0038] Alternatively, the de-escalation determination unit 42 may determine whether the long object 60 held by the passenger de-escalating from the passenger conveyor 1 is the same as the long object 60 determined by the long object determination unit 41 by comparing the calculated length of the luggage with the length of the long object 60 calculated by the long object determination unit 41. Thus, the de-escalation determination unit 42 may determine that the passenger holding the long object 60 determined by the long object determination unit 41 has de-escalated from the passenger conveyor 1.
[0039] The current measuring unit 43 measures the motor current value flowing through the driving motor 12 that circulates the steps 2. The current measuring unit 43 may continue to measure the motor current value before the long object determination unit 41 determines that the passenger boarding the passenger conveyor 1 holds the long object 60. In addition, the current measuring unit 43 may continue to measure the motor current value after the step-off determination unit 42 determines that the passenger stepping off the passenger conveyor 1 holds the long object 60.
[0040] The current determination unit 44 determines whether the motor current value measured by the current measurement unit 43 reaches a predetermined overload current value. The overload current value may be set to a current value flowing through the drive motor 12 when the number of passengers reaches the rated number of passengers, or may be set to a current value capable of protecting the drive motor 12 and a current supply system for the drive motor 12.
[0041] The rate of increase acquisition unit 45 may also acquire the rate of increase of the motor current flowing through the drive motor 12 that circulates the step 2 when the long object determination unit 41 determines that the passenger is holding the long object 60. For example, the rate of increase acquisition unit 45 may calculate the motor current rate of increase based on the motor current value of the drive motor 12 measured by the above-mentioned current measurement unit 43. The motor current rate of increase may also be calculated as the rate of change of the motor current value at a predetermined time interval.
[0042] In addition, the increase rate acquisition unit 45 may stop acquiring the motor current increase rate when the above-mentioned de-escalation determination unit 42 determines that the passenger de-escalating from the passenger conveyor 1 holds the long object 60 .
[0043] When the motor current value of the drive motor 12 reaches a predetermined overload current value, the rate-of-rise determination unit 46 determines whether the motor current rate of increase acquired by the rate-of-rise acquisition unit 45 when the motor current value reaches the overload current value is greater than the reference rate of increase. In other words, the rate-of-rise determination unit 46 determines whether the motor current rate of increase just calculated (or last calculated) is greater than the reference rate of increase when the motor current value reaches the overload current value. The rate-of-rise determination unit 46 determines the motor current rate of increase when the current determination unit 44 determines that the motor current value has reached the overload current value.
[0044] Regarding the motor current rise rate, use Figure 5 to Figure 7The following will be described in more detail. Figure 5 The figure shows how the motor current value changes when the number of passengers on the passenger conveyor 1 gradually increases. Figure 6 This is a diagram showing a state in which a long object 60 held by a passenger is sandwiched between the steps 2 and the ceiling 26 . Figure 7 The figure shows how the motor current value changes when the long object 60 is sandwiched between the steps 2 and the ceiling 26 .
[0045] like Figure 5 As shown, when the number of passengers on the passenger conveyor 1 gradually increases, the motor current value gradually increases slowly and reaches the overload current value in a short time. In this case, the motor current rising rate when the motor current value reaches the overload current value is relatively small.
[0046] On the other hand, when the long object 60 is sandwiched between the step 2 and the ceiling 26, the motor current rising rate becomes relatively large. More specifically, Figure 6 As shown in FIG. 1 , it is assumed that a passenger who stops at the step 2 places a long object 60 vertically on the step 2. When the long object 60 is longer than the reference length, as the step 2 moves, the upper end of the long object 60 gradually approaches the horizontal ceiling 26 and collides with the ceiling 26. In this case, it is considered that the long object 60 is sandwiched between the step 2 and the ceiling 26. In this case, Figure 7 As shown, the motor current value rises sharply in a short time and reaches the overload current value.
[0047] In this way, even if the motor current value reaches the overload current value, Figure 7 The increase in the motor current value shown is also consistent with Figure 5 The situations of the increase of the motor current value shown are different. The safety system 30 of the present embodiment utilizes the difference in the increase rate of the motor current value. Therefore, based on the determination of whether the motor current increase rate when the motor current value reaches the overload current value is above the reference increase rate, it is possible to determine whether the long object 60 is clamped by the step 2 and the ceiling 26.
[0048] like Figure 2 As shown, when the increase rate determination unit 46 determines that the motor current increase rate is greater than the reference increase rate, the brake control unit 47 operates the brake 14 to stop the circular movement of the step 2. In this case, the brake 14 stops the circular movement of the step 2 by stopping the rotation of the drive motor 12. By operating the brake 14, the step 2 can be stopped more quickly than when the motor current is cut off.
[0049] The current control unit 48 stops supplying the motor current to the drive motor 12 when the increase rate determination unit 46 determines that the motor current increase rate is less than the reference increase rate. For example, the current control unit 48 may also operate a circuit breaker (not shown) to cut off the motor current. As a result, the rotation of the drive motor 12 stops. In addition, the current control unit 48 may also cut off the motor current to the drive motor 12 when it is determined that the motor current increase rate is greater than the reference increase rate.
[0050] The notification unit 49 may also make a notification to urge the passenger to pay attention to the elongated object 60 when the elongated object determination unit 41 determines that the passenger holds the elongated object 60. For example, the notification unit 49 may make a broadcast to urge the passenger to pay attention to the elongated object 60 through the speaker 23.
[0051] In addition, the notification unit 49 may stop the notification when the alighting determination unit 42 determines that the passenger alighting from the passenger conveyor 1 holds the long object 60 .
[0052] In addition, the safety device 40 of the present embodiment may also include a speed control unit 50. The speed control unit 50 may also reduce the moving speed of the step 2 when the long object determination unit 41 determines that the passenger holds the long object 60. As a result, the passenger holding the long object 60 can safely take the elevator. The speed control unit 50 may also reduce the moving speed of the step 2 by controlling the drive motor 12 of the above-mentioned drive device 3. The speed control unit 50 may also reduce the moving speed of the step 2 at the same timing as the start and stop of the report of the above-mentioned reporting unit 49.
[0053] In addition, the safety device 40 of this embodiment may further include a lighting control unit 51. The lighting control unit 51 may also change the lighting mode of the passenger conveyor 1 when the elongated object determination unit 41 determines that the passenger holds the elongated object 60. The lighting control unit 51 may also control the lighting device (see Figure 1 ) to change the lighting method. For example, the lighting control unit 51 can change the color of the lighting of the lighting device 22, or can also change the lighting of the lighting device 22 from lighting to flashing. The lighting control unit 51 can also change the lighting method of the passenger conveyor 1 at the same timing as the start and stop of the report of the reporting unit 49 mentioned above. By changing the lighting method of the passenger conveyor 1, the attention of passengers holding the long object 60 can be prompted, and the long object 60 can be prevented from interfering with the ceiling 26. In addition, for the hearing-impaired, the attention can be effectively prompted.
[0054] Next, the operation method of the passenger conveyor of this embodiment having such a structure will be described. Figure 8 The operation method shown in the flowchart is described below.
[0055] like Figure 8 As shown, after the passenger conveyor 1 starts to operate, as step S1, the length information of the luggage held by the passenger who gets on the passenger conveyor 1 is obtained by the entrance length information acquisition unit 31. For example, images are captured by the entrance pole camera 33 and the entrance ceiling camera 34. Each captured image is sent to the safety device 40.
[0056] After step S1, as step S2, the long object determination unit 41 determines whether the passenger boarding the passenger conveyor 1 is carrying a long object 60 having a length longer than a reference length. For example, the length of the luggage is calculated based on each image and compared with the reference length. The length of the luggage determined to be the long object 60 may also be stored in a storage unit (not shown). If it is determined that the passenger is not carrying the long object 60, the process returns to the above step S1.
[0057] If it is determined in step S2 that the passenger is holding the long object 60, as step S3, the motor current increase rate flowing through the drive motor 12 that circulates the steps 2 is obtained by the increase rate acquisition unit 45. For example, the motor current increase rate is calculated based on the motor current value of the drive motor 12 measured by the above-mentioned current measurement unit 43. The calculated motor current increase rate may also be stored in a storage unit (not shown).
[0058] In step S3, a notification is made by the notification unit 49 to urge attention to the handling of the long object 60. For example, the notification is made from each speaker 23 provided on the skirt board 5 to urge attention to the handling of the long object 60.
[0059] After step S3, as step S4, the landing length information acquisition unit 32 acquires the length information of the luggage held by the passenger getting off the passenger conveyor 1. For example, images are captured by the landing pole camera 35 and the landing ceiling camera 36. Each captured image is sent to the safety device 40.
[0060] After step S4, in step S5, the descending determination unit 42 determines whether the passenger descending from the passenger conveyor 1 is carrying the long object 60. For example, the length of the baggage is calculated from each image and compared with a reference length.
[0061] In step S5, if it is determined that the passenger who has disembarked from the passenger conveyor 1 is holding the long object 60, as step S6, the acquisition of the motor current increase rate by the increase rate acquisition unit 45 is stopped. In the case where it is determined that the passenger who has disembarked from the passenger conveyor 1 is holding the long object 60, it can be considered that the passenger holding the long object 60 determined in step S2 has disembarked from the passenger conveyor 1. Therefore, it can be considered that there is no passenger holding the long object 60 in the passenger conveyor 1. In addition, in step S6, the broadcast of the processing of urging attention to the long object 60 by the notification unit 49 is stopped.
[0062] After step S6, the process returns to the above-mentioned step S1.
[0063] In step S5, if it is determined that the passenger getting off the passenger conveyor 1 does not hold the long object 60, the current determination unit 44 determines whether the motor current value has reached the overload current value as step S7. If it is determined that the passenger getting off the passenger conveyor 1 does not hold the long object 60, it can be regarded that the passenger holding the long object 60 is still riding on the passenger conveyor 1. If it is determined in step S7 that the motor current value has not reached the overload current value, the process returns to the above step S4.
[0064] If it is determined in step S7 that the motor current value has reached the overload current value, the increase rate determination unit 46 determines in step S8 whether the motor current increase rate acquired when the motor current value reached the overload current value is equal to or greater than a reference increase rate.
[0065] In step S8, when it is determined that the motor current increase rate is greater than the reference increase rate, in step S9, the brake 14 is actuated by the brake control unit 47 to stop the circular movement of the step 2. Figure 7 As shown in the figure, when the motor current increase rate is higher than the reference increase rate, Figure 6 As shown, the long object 60 held by the passenger on the step 2 is considered to be caught between the step 2 and the ceiling 26, and the step 2 is restrained. Therefore, the brake 14 is actuated to rapidly stop the step 2. Thus, the operation of the passenger conveyor 1 is stopped.
[0066] On the other hand, in step S8, when it is determined that the motor current increase rate is less than the reference increase rate, as step S10, the current control unit 48 is used to stop supplying the motor current to the drive motor 12. For example, the current control unit 48 is used to operate a circuit breaker (not shown) to cut off the motor current. As a result, the rotation of the drive motor 12 stops, and the operation of the passenger conveyor 1 stops. When the motor current increase rate is less than the reference increase rate, it can be considered that the step 2 is not bound by the long object 60, but the rated number of people of the passenger conveyor 1 has been reached. In this case, the brake 14 may not be operated.
[0067] Thus, according to the present embodiment, when a passenger holding a long object 60 gets on the passenger conveyor 1 and the motor current value of the drive motor 12 reaches a predetermined overload current value, it is determined whether the motor current increase rate when the motor current value reaches the overload current value is greater than the reference increase rate. When the motor current increase rate is greater than the reference increase rate, the brake 14 is actuated to stop the circular movement of the step 2. In this case, it can be considered that the long object 60 is clamped between the step 2 and the ceiling 26 of the building where the passenger conveyor 1 is installed, and the step 2 is restrained. Therefore, the brake 14 can be actuated to quickly stop the circular movement of the step 2, and damage to the step 2 can be prevented.
[0068] According to the present embodiment, the length information of the luggage carried by the passenger boarding the passenger conveyor 1 is obtained, and based on the length information, it is determined whether the luggage is the long object 60. Thus, it is possible to determine whether the passenger boarding the passenger conveyor 1 is carrying the long object 60.
[0069] According to the present embodiment, the landing length information acquisition unit 31 includes the landing pole camera 33 and the landing ceiling camera 34 that capture images of the luggage in different directions. This allows the length of the luggage to be acquired with high accuracy.
[0070] In addition, according to the present embodiment, it is possible to determine whether the passenger holding the long object 60 has gotten off the passenger conveyor 1. When it is determined that the passenger holding the long object 60 has gotten off, the acquisition of the motor current increase rate of the drive motor 12 is stopped. Thus, the operation of the passenger conveyor 1 can be returned to the original operation state.
[0071] Furthermore, according to the present embodiment, when it is determined that a passenger boarding the passenger conveyor 1 is holding an elongated object 60, an announcement is made to prompt the passenger to pay attention to the elongated object 60. Thus, the passenger holding the elongated object 60 can be prompted to pay attention, and the elongated object 60 can be prevented from interfering with the ceiling 26. Therefore, the elongated object 60 can be prevented from being caught between the steps 2 and the ceiling 26 in advance.
[0072] In addition, in the above-mentioned present embodiment, an example is described in which the entrance length information acquisition unit 31 includes the entrance pole camera 33 and the entrance ceiling camera 34. However, the present embodiment is not limited to this. As long as the entrance length information acquisition unit 31 can photograph the luggage of the passenger in two different directions, the positions and photographing directions of the two cameras are arbitrary. The same is true for the lower entrance length information acquisition unit 32.
[0073] According to the above-described embodiment, even when a long object held by a passenger is caught between the steps and the ceiling, it is possible to prevent the steps from being damaged.
[0074] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the subject matter of the invention. These embodiments and their variations are included in the scope and subject matter of the invention, and are included in the invention described in the claims and the scope of their equivalents.
Claims
1. A safety system for a passenger conveyor, characterized in that: have: a long object determination unit for determining whether a passenger boarding the passenger conveyor is carrying a long object having a length longer than a reference length; an increase rate acquisition unit for acquiring a motor current increase rate of a drive motor for causing the steps to circulate when the elongated object determination unit determines that the passenger is holding the elongated object; a rising rate determination unit, which determines, when a motor current value of the drive motor reaches a predetermined overload current value, whether the motor current rising rate acquired by the rising rate acquisition unit when the motor current value reaches the overload current value is greater than a reference rising rate; as well as The brake control unit operates a brake to stop the circular movement of the step when the increase rate determination unit determines that the motor current increase rate is equal to or greater than the reference increase rate.
2. The safety system for a passenger conveyor according to claim 1, characterized in that: The device further comprises a landing length information acquisition unit for acquiring length information of luggage held by a passenger boarding the passenger conveyor. The elongated object determination unit determines whether the luggage is the elongated object based on the length information acquired by the entrance length information acquisition unit.
3. The safety system for a passenger conveyor according to claim 2, characterized in that: The entrance hall length information acquisition unit includes a first imaging unit that images the luggage and a second imaging unit that images the luggage in a direction different from that of the first imaging unit.
4. The safety system for a passenger conveyor according to claim 1, characterized in that: The apparatus further comprises a step-down determination unit for determining whether a passenger stepping down from the passenger conveyor is holding the elongated object. When the descent determination unit determines that the passenger is holding the long object, the increase rate acquisition unit stops acquiring the motor current increase rate.
5. The safety system for a passenger conveyor according to claim 1, characterized in that: The vehicle further includes a notification unit configured to perform notification of a process for prompting attention to the long object when the long object determination unit determines that the passenger is holding the long object.
6. The safety system for a passenger conveyor according to claim 1, characterized in that: The system further includes a speed control unit that reduces the moving speed of the step when the elongated object determination unit determines that the passenger is holding the elongated object.
7. The safety system for a passenger conveyor according to claim 1, characterized in that: The invention further includes a lighting control unit configured to change a lighting mode of the passenger conveyor when the elongated object determination unit determines that the passenger holds the elongated object.
8. A passenger conveyor, characterized in that: A passenger conveyor safety system according to any one of claims 1 to 7.
9. A method for operating a passenger conveyor, characterized in that: The following steps are required: Determining whether a passenger boarding the passenger conveyor is holding a long object having a length longer than a reference length; When it is determined that the passenger is holding the long object, obtaining a motor current increase rate of a driving motor for causing the steps to move cyclically; When the motor current value of the drive motor reaches a predetermined overload current value, determining whether the motor current increase rate when the motor current value reaches the overload current value is greater than a reference increase rate; and When it is determined that the motor current increase rate is equal to or higher than the reference increase rate, a brake is actuated to stop the circular movement of the step.