CN112996740A - Elevator device - Google Patents
Elevator device Download PDFInfo
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- CN112996740A CN112996740A CN201980073642.5A CN201980073642A CN112996740A CN 112996740 A CN112996740 A CN 112996740A CN 201980073642 A CN201980073642 A CN 201980073642A CN 112996740 A CN112996740 A CN 112996740A
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- signal
- accelerometer
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- detected
- displacement meter
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 71
- 230000001133 acceleration Effects 0.000 claims abstract description 30
- 238000002955 isolation Methods 0.000 claims description 15
- 238000003745 diagnosis Methods 0.000 claims description 8
- 230000005856 abnormality Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 10
- 238000011084 recovery Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
Landscapes
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
An elevator device is provided with a car (9), an accelerometer (15), an operation control unit (22), and a displacement meter (16). The car (9) moves in the hoistway (6) and the hoistway (7). The accelerometer (15) is provided on the base structure (2) or the upper structure (4). A displacement meter (16) detects the relative displacement of the base structure (2) and the upper structure (4) in the horizontal direction. The operation control unit (22) starts a diagnostic operation on the basis of the acceleration detected by the accelerometer (15) and the relative displacement detected by the displacement meter (16).
Description
Technical Field
The present invention relates to an elevator apparatus.
Background
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2009-12931
Disclosure of Invention
Problems to be solved by the invention
In the elevator apparatus described in patent document 1, a hoistway is formed in a structure supported by a vibration isolation device.
On the other hand, some buildings provided with a vibration isolation device include a base structure and an upper structure provided on the base structure with the vibration isolation device interposed therebetween, and each of the buildings includes an elevator shaft. In the elevator apparatus provided in such a building, there is a problem that it is difficult to determine whether or not automatic recovery after an earthquake is possible only from a signal from the earthquake detector.
The present invention has been made to solve the above problems. The invention aims to provide an elevator device, which can appropriately judge whether automatic recovery after earthquake is possible even if a hoistway is formed on both a base structure and an upper structure.
Means for solving the problems
An elevator apparatus of the present invention is an elevator apparatus provided in a building including a base structure, a vibration isolation device provided in the base structure, and an upper structure provided in the base structure with the vibration isolation device interposed therebetween. The elevator device is provided with: a car that moves in a 1 st hoistway formed in the base structure and a 2 nd hoistway formed in the upper structure; an accelerometer provided on the base structure or the upper structure; an operation control means for performing a control operation for evacuating passengers in the car, based on the acceleration detected by the accelerometer; and a displacement meter that detects a relative displacement of the base structure and the upper structure in the horizontal direction. When the control operation is completed, the operation control means starts a diagnosis operation for determining the presence or absence of an abnormality based on the acceleration detected by the accelerometer and the relative displacement detected by the displacement meter.
Effects of the invention
According to the present invention, in an elevator apparatus in which a hoistway is formed in both a base structure and an upper structure, it is possible to appropriately determine whether or not automatic recovery after an earthquake is possible.
Drawings
Fig. 1 is a diagram showing an example of an elevator apparatus according to embodiment 1.
Fig. 2 is a block diagram showing the functions of the control device.
Fig. 3 is a flowchart showing an operation example of the elevator apparatus according to embodiment 1.
Fig. 4 is a diagram for explaining the function of the control device.
Fig. 5 is a flowchart showing an example of the 2 nd control.
Fig. 6 is a flowchart showing an example of the 3 rd control.
Fig. 7 is a flowchart showing an example of the 1 st control.
Fig. 8 is a diagram showing an example of hardware resources of the control device.
Fig. 9 is a diagram showing another example of hardware resources of the control device.
Detailed Description
The invention is described with reference to the accompanying drawings. Duplicate descriptions are appropriately simplified or omitted. In the drawings, the same reference numerals denote the same or equivalent parts.
Fig. 1 is a diagram showing an example of an elevator apparatus according to embodiment 1. Fig. 1 shows an example in which a building 1 is provided with an elevator apparatus. The building 1 includes, for example, a base structure 2, a seismic isolation device 3, and an upper structure 4.
The foundation structure 2 is installed on the floor 5. The seismic isolation device 3 is provided above the base structure 2. The upper structure 4 is provided to the base structure 2 via the seismic isolation device 3. The seismic isolation device 3 absorbs the vibration of the base structure 2, and the vibration of the base structure 2 is less likely to be transmitted to the upper structure 4. Therefore, when an earthquake occurs, the upper structure 4 is less likely to shake than the base structure 2.
In the example shown in fig. 1, a hoistway 6 is formed in the base structure 2. The upper structure 4 is formed with a hoistway 7. The hoistway 6 and the hoistway 7 are formed in the building 1 so as to extend straight in a straight line up and down. That is, the hoistway 7 is disposed directly above the hoistway 6. Fig. 1 shows an example in which a machine room 8 for an elevator is formed in an upper structural body 4. The machine room 8 is disposed above the hoistway 7.
The elevator apparatus includes a car 9 and a counterweight 10. The car 9 moves up and down in the hoistway 6 and the hoistway 7. For example, the car 9 passes through a height at which the vibration isolation device 3 is disposed. The counterweight 10 moves up and down in the hoistway 6 and the hoistway 7. The car 9 and the counterweight 10 are suspended in the hoistway 6 and the hoistway 7 by the main ropes 11.
The main ropes 11 are wound around a drive sheave 13 of the hoisting machine 12. The car 9 moves in accordance with the rotation of the drive sheave 13. The control device 14 controls the rotation and stop of the drive sheave 13. That is, the movement of the car 9 is controlled by the control device 14.
An accelerometer 15 and a displacement meter 16 are provided in the building 1. The accelerometer 15 is an example of a seismic detector. Fig. 1 shows an example in which the accelerometer 15 is provided on the base structure 2. The accelerometer 15 may also be provided on the upper structure 4. In the example shown in fig. 1, the accelerometer 15 detects the acceleration of the base structure 2. The accelerometer 15 outputs a signal corresponding to the detected acceleration. The signal from the accelerometer 15 is input to the control device 14.
In the present embodiment, an example will be described in which the accelerometer 15 outputs a 3-level signal based on the detected acceleration. For example, the accelerometer 15 outputs a 1 st signal when it detects a specific 1 st level of acceleration. The accelerometer 15 outputs a 2 nd signal when it detects a specific 2 nd level of acceleration. The acceleration of level 2 is greater than the acceleration of level 1. The accelerometer 15 outputs a 3 rd signal when it detects a specific 3 rd level of acceleration. The acceleration of level 3 is greater than the acceleration of level 2.
The displacement meter 16 detects the relative displacement of the base structure 2 and the upper structure 4 in the horizontal direction. For example, the displacement meter 16 detects the amount of displacement of the upper structure 4 in the horizontal direction with respect to the base structure 2. The manner in which the displacement meter 16 detects the relative displacement may be any manner. The displacement meter 16 outputs a signal corresponding to the detected relative displacement. The signal from the displacement meter 16 is input to the control device 14. In the present embodiment, an example will be described in which the detection signal is output when the displacement meter 16 detects a relative displacement larger than a specific threshold value. The displacement meter 16 may output a plurality of kinds of signals according to the level of the detected relative displacement.
Fig. 2 is a block diagram showing the function of the control device 14. The control device 14 includes, for example, a storage unit 20, a condition determination unit 21, and an operation control unit 22. The storage unit 20 stores information necessary for control.
The operation control unit 22 controls, for example, automatic operation, earthquake control operation, and diagnosis operation. The automatic operation is an operation in which the car 9 sequentially responds to registered calls. The earthquake control operation is an operation for evacuating passengers in the car 9 immediately after an earthquake occurs. The operation control unit 22 performs the earthquake control operation based on the acceleration detected by the accelerometer 15. For example, when at least one of the 1 st signal, the 2 nd signal, and the 3 rd signal is output from the accelerometer 15, the operation control unit 22 performs the earthquake control operation. The diagnosis operation is an operation for determining the presence or absence of an abnormality. The diagnosis operation is performed by moving the car 9 after the end of the earthquake control operation.
In the example shown in the present embodiment, since the car 9 moves in both the hoistway 6 and the hoistway 7, the start of the diagnosis operation is determined not only based on the acceleration detected by the accelerometer 15. The operation control unit 22 starts the diagnosis operation based on both the acceleration detected by the accelerometer 15 and the relative displacement detected by the displacement meter 16. Hereinafter, the functions of the elevator apparatus will be described in detail with reference to fig. 3 to 7. Fig. 3 is a flowchart showing an operation example of the elevator apparatus according to embodiment 1. Fig. 4 is a diagram for explaining the function of the control device 14.
The control device 14 determines whether or not the 3 rd signal is input from the accelerometer 15 (S101). For example, when an acceleration greater than the acceleration of the 3 rd level acts on the accelerometer 15, a 3 rd signal is output from the accelerometer 15. When the 3 rd signal is input from the accelerometer 15 (yes in S101), the control device 14 performs the 3 rd control (S102).
In the control device 14, if the 3 rd signal is not input from the accelerometer 15 (no in S101), it is determined whether the 2 nd signal is input from the accelerometer 15 (S103). For example, when acceleration smaller than the acceleration of the 3 rd level and larger than the acceleration of the 2 nd level is applied to the accelerometer 15, the 2 nd signal is output from the accelerometer 15. When the No. 3 signal is input from the accelerometer 15 and the No. 2 signal is input (yes in S103), the control device 14 performs the No. 2 control (S104).
In the control device 14, if the 2 nd signal is not input from the accelerometer 15 (no in S103), it is determined whether the 1 st signal is input from the accelerometer 15 (S105). For example, when acceleration smaller than the acceleration of the 2 nd level and larger than the acceleration of the 1 st level is applied to the accelerometer 15, the 1 st signal is output from the accelerometer 15. When the No. 2 signal is input from the accelerometer 15 and the No. 1 signal is input (yes in S105), the control device 14 performs the No. 1 control (S106).
If any one of the 1 st signal, the 2 nd signal and the 3 rd signal is not inputted from the accelerometer 15, the operation control section 22 performs the automatic operation (S107).
Fig. 5 is a flowchart showing an example of the 2 nd control. As described above, the 2 nd control is performed when the 3 rd signal is not output from the accelerometer 15 but the 2 nd signal is output.
When the 2 nd signal is input from the accelerometer 15 to the control device 14, the operation control unit 22 starts the earthquake control operation (S201). In the earthquake control operation, the operation control unit 22 stops the car 9 at the nearest floor, for example. The operation control unit 22 opens the door after the car 9 stops. In this case, a broadcast for prompting the elevator to get off may be provided in the car 9. The operation control unit 22 opens the door of the car at the floor where the car stops, and then closes the door when a predetermined time has elapsed.
When the earthquake control operation is completed, the condition determination unit 21 determines whether or not a specific start condition is satisfied (S202). The start condition is a condition for starting the diagnostic operation. For example, the start condition is satisfied when both of the following requirement 1 and requirement 2 are satisfied.
Requirement 1: the no 3 rd signal but the no 2 nd signal is output from the accelerometer 15.
Requirement 2: the relative displacement detected by the displacement meter 16 is smaller than a specific threshold value TH.
In the case where the 2 nd control is being performed, the above requirement 1 is satisfied. Therefore, if the relative displacement detected by the displacement meter 16 is smaller than the threshold TH while the control of the 2 nd stage is being performed, the start condition is satisfied. On the other hand, if the relative displacement detected by the displacement meter 16 is not less than the threshold TH, the start condition is not satisfied.
When the condition determination unit 21 determines that the start condition is satisfied (yes in S202), the operation control unit 22 starts the diagnostic operation (S203). During the diagnosis operation, it is determined whether or not an abnormality is detected based on the acquired data (S204). When an abnormality is detected during the diagnostic operation (yes in S204), the operation control unit 22 stops the elevator (S208). When the abnormality is not detected and the operation is diagnosed to be ended (yes in S205), the operation control unit 22 returns the elevator to the automatic operation (S206).
On the other hand, when the condition determination unit 21 determines that the start condition is not satisfied (no in S202), the operation control unit 22 also stops the elevator as shown in fig. 4 (S207). For example, even if requirement 1 is satisfied, if the relative displacement detected by displacement meter 16 is greater than threshold TH, the start condition is not satisfied, and the elevator is stopped.
When the elevator is suspended in S207, the process returns to S202. That is, the condition determination unit 21 determines again whether or not the start condition is satisfied. For example, consider a case where the displacement meter 16 detects the relative displacement indicated by point B in fig. 4 immediately after the end of the seismic control operation. The value detected by the displacement meter 16 decreases with the passage of time. Therefore, even if the start condition is not satisfied immediately after the end of the earthquake control operation, the start condition is satisfied at that time if the relative displacement detected by the displacement meter 16 is smaller than the threshold TH. When the condition determination unit 21 determines that the start condition is satisfied (yes in S202), the operation control unit 22 starts the diagnostic operation (S203). In addition, a range a in fig. 4 indicates a range in which the start condition is satisfied.
Fig. 6 is a flowchart showing an example of the 3 rd control. The 3 rd control is performed when the 3 rd signal is output from the accelerometer 15.
When the 3 rd signal is input from the accelerometer 15 to the control device 14, the operation control unit 22 starts the earthquake control operation (S301). In S301, the same processing as that performed in S201 is performed.
When the 3 rd signal is input from the accelerometer 15 to the control device 14, the requirement 1 is not satisfied. Therefore, in the 3 rd control, the start condition is not satisfied regardless of the relative displacement detected by the displacement meter 16 (S302). In the 3 rd control, when the vibration damping control operation is finished, the operation control unit 22 stops the elevator (S303).
Fig. 7 is a flowchart showing an example of the 1 st control. The 1 st control is performed when the 2 nd signal is not output from the accelerometer 15 but the 1 st signal is output.
When the 1 st signal is input from the accelerometer 15 to the control device 14, the operation control unit 22 starts the earthquake control operation (S401). In S401, the same processing as that performed in S201 is performed.
In the case where the 2 nd signal is not input from the accelerometer 15 to the control device 14, the requirement 1 described above is not satisfied. Therefore, in the 1 st control, the start condition is not satisfied regardless of the relative displacement detected by the displacement meter 16 (S402). In the 1 st control, when the earthquake control operation is finished, it is determined whether or not the relative displacement detected by the displacement meter 16 is smaller than the threshold TH (S403).
If the relative displacement detected by the displacement meter 16 is smaller than the threshold TH (yes in S403), it is determined whether or not a predetermined time has elapsed from the end of the earthquake control operation (S404). If yes is determined in S404, the operation control unit 22 returns the elevator to the automatic operation (S405).
On the other hand, if the relative displacement detected by the displacement meter 16 is not less than the threshold TH (no in S403), the operation control unit 22 stops the elevator (S406). When the elevator is suspended in S406, the process returns to S403. That is, it is determined again whether or not the relative displacement detected by the displacement meter 16 is smaller than the threshold TH. For example, even if it is determined as "no" in S403 immediately after the end of the earthquake control operation, if the relative displacement detected by the displacement meter 16 is smaller than the threshold TH thereafter, it is determined as "yes" in S403. In this case, in S404, it is determined whether or not a predetermined time has elapsed since the determination of yes in S403.
In the example shown in the present embodiment, in the 2 nd control, it is determined whether or not the diagnostic operation can be started based on both the acceleration detected by the accelerometer 15 and the relative displacement detected by the displacement meter 16. Therefore, in the elevator apparatus in which the hoistways are formed in both the base structure 2 and the upper structure 4, it is possible to appropriately determine whether or not the automatic recovery after the earthquake is possible.
In the present embodiment, an example in which the determination of S202 is performed again after the elevator is stopped in S207 in the 2 nd control is described. This is only an example. In the 2 nd control, the processing may be terminated by stopping the elevator in S207. As another example, the processing may be ended when the predetermined time has elapsed after the elevator is stopped in S207 and the determination in S202 is not "yes".
Similarly, in the present embodiment, an example in which the determination at S403 is performed again after the elevator is stopped at S406 in the 1 st control is described. This is only an example. In the 1 st control, the processing may be terminated by stopping the elevator in S406. As another example, the processing may be terminated when a predetermined time has elapsed after the elevator is stopped in S406 and the determination of yes in S403 has not been made.
In the present embodiment, each part shown by reference numerals 20 to 22 represents a function of the control device 14. Fig. 8 is a diagram showing an example of hardware resources of the control device 14. The control device 14 includes, as hardware resources, a processing circuit 30 including, for example, a processor 31 and a memory 32. The function of the storage unit 20 is realized by the memory 32. The controller 14 executes the program stored in the memory 32 by the processor 31, thereby realizing the functions of the respective parts shown by reference numerals 21 to 22.
Fig. 9 is a diagram showing another example of the hardware resources of the control device 14. In the example shown in fig. 9, the control device 14 includes a processing circuit 30 including, for example, a processor 31, a memory 32, and dedicated hardware 33. Fig. 9 shows an example in which a part of the functions of the control device 14 is realized by dedicated hardware 33. All of the functions of the control device 14 may be realized by dedicated hardware 33.
Industrial applicability
The elevator apparatus of the present invention can be applied to a building in which an upper structure is installed in a base structure with a vibration isolation device interposed therebetween.
Description of the reference symbols
1: a building; 2: a base structure; 3: a vibration isolation device; 4: an upper structure; 5: a ground surface; 6: a hoistway; 7, a shaft; 8: a machine room; 9: a car; 10: a counterweight; 11: a main rope; 12: a traction machine; 13: a drive sheave; 14: a control device; 15: an accelerometer; 16: a displacement meter; 20: a storage unit; 21: a condition determination unit; 22: an operation control unit; 30 a processing circuit; 31: a processor; 32: a memory; 33: special hardware
Claims (7)
1. An elevator apparatus provided in a building including a base structure, a vibration isolation device provided in the base structure, and an upper structure provided in the base structure with the vibration isolation device interposed therebetween, the elevator apparatus comprising:
a car that moves in a 1 st hoistway formed in the base structure and a 2 nd hoistway formed in the upper structure;
an accelerometer provided on the base structure or the upper structure;
an operation control unit that performs a control operation for evacuating passengers in the car, based on the acceleration detected by the accelerometer; and
a displacement meter that detects a relative displacement in a horizontal direction of the base structure and the upper structure,
the operation control means starts a diagnosis operation for determining the presence or absence of an abnormality based on the acceleration detected by the accelerometer and the relative displacement detected by the displacement meter when the control operation is completed.
2. The elevator arrangement according to claim 1,
the elevator device is also provided with a judging unit for judging whether a specific starting condition is satisfied or not,
when the determination unit determines that the start condition is satisfied, the operation control unit starts the diagnostic operation.
3. The elevator arrangement according to claim 2,
the accelerometer outputs a 1 st signal when detecting a specific 1 st level of acceleration, outputs a 2 nd signal when detecting a specific 2 nd level of acceleration greater than the 1 st level, and outputs a 3 rd signal when detecting a specific 3 rd level of acceleration greater than the 2 nd level,
the operation control unit performs the regulated operation when at least any one of the 1 st signal, the 2 nd signal, and the 3 rd signal is output from the accelerometer,
the start condition is satisfied when the 3 rd signal is not output from the accelerometer but the 2 nd signal is output and the relative displacement detected by the displacement meter is smaller than a specific threshold value.
4. The elevator arrangement according to claim 3,
the start condition is not satisfied when the relative displacement detected by the displacement meter is larger than the threshold value even if the 3 rd signal is not output from the accelerometer but the 2 nd signal is output.
5. The elevator arrangement according to claim 4,
even in the case where the 3 rd signal is not output from the accelerometer but the 2 nd signal is output, and the start condition is not satisfied because the relative displacement detected by the displacement meter is larger than the threshold value, the start condition is satisfied when the relative displacement detected by the displacement meter becomes smaller than the threshold value thereafter.
6. The elevator arrangement according to one of claims 3 to 5,
when the 3 rd signal is output from the accelerometer, the start condition does not hold regardless of the relative displacement detected by the displacement meter.
7. The elevator arrangement according to one of claims 3 to 6,
the operation control means returns to the automatic operation after a predetermined time has elapsed if the relative displacement detected by the displacement meter is smaller than the threshold value when the 2 nd signal is not output from the accelerometer but the 1 st signal is output.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2019/009120 WO2020179062A1 (en) | 2019-03-07 | 2019-03-07 | Elevator device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112996740A true CN112996740A (en) | 2021-06-18 |
| CN112996740B CN112996740B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980073642.5A Active CN112996740B (en) | 2019-03-07 | 2019-03-07 | Elevator device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6648864B1 (en) |
| CN (1) | CN112996740B (en) |
| WO (1) | WO2020179062A1 (en) |
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|---|---|---|---|---|
| JP2004345752A (en) * | 2003-05-20 | 2004-12-09 | Mitsubishi Electric Corp | Control device of elevator for base-isolated building |
| CN101513970A (en) * | 2008-02-22 | 2009-08-26 | 三菱电机大楼技术服务株式会社 | Elevator control apparatus and control method |
| CN101537956A (en) * | 2008-03-18 | 2009-09-23 | 三菱电机株式会社 | Earthquake recovery apparatus for elevator |
| CN101683945A (en) * | 2008-09-27 | 2010-03-31 | 三菱电机大楼技术服务株式会社 | Diagnosis operation device and method of elevator |
| WO2018134891A1 (en) * | 2017-01-17 | 2018-07-26 | 三菱電機ビルテクノサービス株式会社 | Elevator automatic recovery system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4096925A (en) * | 1977-04-08 | 1978-06-27 | Westinghouse Electric Corp. | Elevator system with detector for indicating relative positions of car and counterweight |
| JP4265920B2 (en) * | 2003-03-03 | 2009-05-20 | 三菱電機株式会社 | Elevator operation control device |
| JP2007217171A (en) * | 2006-02-20 | 2007-08-30 | Toshiba Elevator Co Ltd | Elevator system |
-
2019
- 2019-03-07 WO PCT/JP2019/009120 patent/WO2020179062A1/en active Application Filing
- 2019-03-07 CN CN201980073642.5A patent/CN112996740B/en active Active
- 2019-03-07 JP JP2019538699A patent/JP6648864B1/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004345752A (en) * | 2003-05-20 | 2004-12-09 | Mitsubishi Electric Corp | Control device of elevator for base-isolated building |
| CN101513970A (en) * | 2008-02-22 | 2009-08-26 | 三菱电机大楼技术服务株式会社 | Elevator control apparatus and control method |
| CN101537956A (en) * | 2008-03-18 | 2009-09-23 | 三菱电机株式会社 | Earthquake recovery apparatus for elevator |
| JP2009220994A (en) * | 2008-03-18 | 2009-10-01 | Mitsubishi Electric Corp | Earthquake recovery device and earthquake recovery operation control method for elevator |
| CN101683945A (en) * | 2008-09-27 | 2010-03-31 | 三菱电机大楼技术服务株式会社 | Diagnosis operation device and method of elevator |
| WO2018134891A1 (en) * | 2017-01-17 | 2018-07-26 | 三菱電機ビルテクノサービス株式会社 | Elevator automatic recovery system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020179062A1 (en) | 2020-09-10 |
| CN112996740B (en) | 2023-04-07 |
| JPWO2020179062A1 (en) | 2021-03-11 |
| JP6648864B1 (en) | 2020-02-14 |
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