CN115380000A - Elevator device - Google Patents
Elevator device Download PDFInfo
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- CN115380000A CN115380000A CN202080098107.8A CN202080098107A CN115380000A CN 115380000 A CN115380000 A CN 115380000A CN 202080098107 A CN202080098107 A CN 202080098107A CN 115380000 A CN115380000 A CN 115380000A
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- elevator
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- 238000012544 monitoring process Methods 0.000 claims abstract description 70
- 238000000034 method Methods 0.000 claims abstract description 59
- 230000008569 process Effects 0.000 claims abstract description 57
- 238000004891 communication Methods 0.000 claims abstract description 40
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 238000012545 processing Methods 0.000 claims abstract description 19
- 230000014759 maintenance of location Effects 0.000 claims abstract description 18
- 238000012423 maintenance Methods 0.000 claims description 63
- 238000007689 inspection Methods 0.000 claims description 17
- 230000000717 retained effect Effects 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 10
- 238000013500 data storage Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
-
- 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
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
Abstract
In an elevator device for accumulating monitoring data of an elevator, the loss of the monitoring data is effectively prevented by flexibly using the failure detection result of the elevator. The elevator device is provided with: an operation control unit for controlling the operation of the elevator; a storage unit for storing the monitoring data of the elevator sequentially acquired by the operation control unit; an interface unit connected to an external device via a communication line; a failure detection unit that performs failure detection processing for detecting a failure of the elevator; and a data control unit that performs a monitoring data retention process of retaining the monitoring data stored in the storage unit in the external device, when it is detected in the failure detection process that there is a failure requiring replacement of the storage unit.
Description
Technical Field
The present invention relates to an elevator apparatus.
Background
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2015-157672
Disclosure of Invention
Problems to be solved by the invention
According to the device of patent document 1, the field adjustment data stored in the monitoring center is always the latest adjustment data. However, in the device of patent document 1, it is necessary to constantly perform the process of reading the live adjustment data by the elevator monitoring device and the process of comparing the read live adjustment data with the comparison source data. The configuration of the device for performing such calculation that is always executed is inefficient because it increases the calculation load and the communication load.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator apparatus for accumulating monitoring data of an elevator, which can efficiently prevent loss of the monitoring data by flexibly using a failure detection result of the elevator.
Means for solving the problems
An elevator apparatus according to the present invention includes: an operation control unit for controlling the operation of the elevator; a storage unit for storing the monitoring data of the elevator sequentially acquired by the operation control unit; an interface unit connected to an external device via a communication line; a failure detection unit that performs failure detection processing for detecting a failure of the elevator; and a data control unit that performs a monitoring data retention process of retaining the monitoring data stored in the storage unit in the external device when it is detected in the failure detection process that there is a failure requiring replacement of the storage unit.
Effects of the invention
The elevator device of the invention reserves the monitoring data stored in the storage part to the external device when detecting that the fault of the storage part needing to be replaced exists. As described above, according to the elevator apparatus of the present invention, whether or not the monitoring data is retained is determined by using the failure detection result of the elevator, and therefore, the loss of the monitoring data can be prevented with high efficiency.
Drawings
Fig. 1 is a diagram showing an example of an elevator apparatus according to embodiment 1.
Fig. 2 is a diagram showing an example of a control device and a communication device according to embodiment 1.
Fig. 3 is a flowchart showing a control routine of the failure detection process executed in the control device of embodiment 1.
Fig. 4 is a flowchart showing a control routine of the monitor data retention process and the retained data write-back process executed in the control device of embodiment 1.
Fig. 5 is a diagram showing an example of hardware resources of the control device.
Fig. 6 is a diagram showing another example of hardware resources of the control device.
Fig. 7 is a diagram showing an example of an elevator apparatus according to embodiment 2.
Fig. 8 is a flowchart showing a control routine of the monitor data retention process and the retained data write-back process executed in the control device of embodiment 2.
Detailed Description
Hereinafter, embodiments will be described with reference to the drawings. In addition, elements common to the drawings are denoted by the same reference numerals, and redundant description thereof is omitted.
1. Embodiment 1.
1-1 structure of elevator apparatus
Fig. 1 is a diagram showing an example of an elevator apparatus according to embodiment 1. The elevator apparatus 100 includes, for example, a car 1 and a counterweight 2. The car 1 moves up and down in the hoistway 3. The counterweight 2 moves up and down in the hoistway 3. The car 1 and the counterweight 2 are suspended in the hoistway 3 by the main ropes 4.
The main ropes 4 are wound around a drive sheave 6 of a hoisting machine 5. The control device 10 controls various devices such as the hoisting machine 5. For example, the controller 10 controls the rotation and stop of the drive sheave 6. The car 1 moves with the rotation of the drive sheave 6. Fig. 1 shows an example in which a hoisting machine 5 and a control device 10 are installed in a machine room 8 above a hoistway 3. The hoisting machine 5 and the control device 10 may be installed in the hoistway 3. When the hoisting machine 5 is installed in the hoistway 3, the hoisting machine 5 may be installed on the top of the hoistway 3 or may be installed in the pit of the hoistway 3.
The communication device 20 is connected to the control device 10 via a communication line. The communication device 20 is a device for communicating with the remote maintenance server 30. The communication device 20 is installed at the same location as the elevator apparatus 100. The remote maintenance server 30 is connected to the communication device 20 via a communication line. The remote maintenance server 30 is, for example, an external device of a maintenance company installed at a remote location different from the location of the elevator apparatus 100. The communication line connecting the communication device 20 and the remote maintenance server 30 is not limited.
Fig. 2 is a diagram showing an example of a control device and a communication device according to embodiment 1. The control device 10 includes an operation control unit 12, a determination unit 14, a storage unit 16, and an interface unit 18. The operation control unit 12 controls various devices such as the hoisting machine 5. The operation control unit 12 controls various devices to perform a normal operation of the elevator apparatus 100. The normal operation is an operation in which the car 1 sequentially responds to registered calls.
The storage unit 16 stores the monitoring data of the elevator apparatus 100 sequentially acquired by the operation control unit 12. The monitoring data here is, for example, operation data or call data of the elevator apparatus 100. The operation data includes, for example, a traveling state, an open/close state of a door, a car load, or a car position. Call data includes data such as call registration of an elevator, assignment of a call, or a response to a call.
The determination unit 14 includes a failure detection unit 141 and a data control unit 142 as functional blocks thereof. The failure detection unit 141 detects a failure of the elevator based on detection values of sensors provided in various places of the elevator. The data control unit 142 controls processing associated with transmission and reception of the monitoring data stored in the storage unit 16.
The interface unit 18 is an interface for connecting a communication line communicating with the remote maintenance server 30 as an external device. The remote maintenance server 30 is connected to the interface unit 18 via the communication device 20.
The communication device 20 controls data communication between the control device 10 and the remote maintenance server 30 of the maintenance company. The communication device 20 includes an interface unit 22, a control unit 24, and a communication unit 26. The interface unit 22 transmits and receives monitoring data to and from the interface unit 18 of the control device 10. The control unit 24 controls reading and writing of the monitoring data from the control device 10 and writing and reading of the monitoring data to and from the remote maintenance server 30. The communication unit 26 communicates with the remote maintenance server 30 via a communication line. The communication line here is, for example, a telephone line. The maintenance company periodically checks the state of the elevator apparatus 100. Typically, the control unit 24 periodically receives the monitoring data stored in the storage unit 16 of the control device 10 and transmits the monitoring data to the remote maintenance server 30. The maintenance company monitors the state of the elevator apparatus 100 based on the monitoring data transmitted from the communication device 20 to the remote maintenance server 30.
1-2 actions of elevator apparatus
The elevator apparatus 100 of the present embodiment performs the failure detection process, the monitoring data retention process, and the monitoring data recovery process as characteristic operations thereof.
1-2-1. Fault detection processing
The failure detection process is a process for detecting a failure of the elevator apparatus 100. The failure detection process is a process repeatedly executed by the determination unit 14 of the control device 10 during the normal operation of the elevator device 100. Fig. 3 is a flowchart showing a control routine of the failure detection process executed in the control device of embodiment 1.
In step S100 of the control routine shown in fig. 3, first, the failure detection unit 141 determines whether or not a failure of the elevator apparatus 100 is detected. As a result, when the failure detection unit 141 does not detect any failure occurrence in the elevator, the process proceeds to step S102, and when the failure detection unit 141 detects a failure occurrence, the process proceeds to step S104.
In step S102, the operation control unit 12 continues the normal operation of the elevator apparatus 100. In step S104, the operation control unit 12 executes an operation stop process for stopping the normal operation. After the process of step S104 is performed, the process proceeds to step S106. In step S106, the determination unit 14 outputs a failure code in response to the detected failure. The fault code is a code indicating an occurred fault. For example, when a failure occurs in a power supply circuit provided in the control device 10, the failure detection unit 141 outputs a failure code indicating that a failure has occurred in the power supply circuit. The failure code is transmitted to the communication device 20 via the interface unit 18. The communicator 20 sends the fault code to the remote maintenance server 30 of the maintenance company. When the processing of step S104 or step S106 is completed, the present routine is ended.
1-2-2. Monitor data retention process and monitor data write-back process
When the maintenance company receives the fault code from the elevator apparatus 100, the maintenance company identifies the cause of the fault based on the received fault code and performs the maintenance operation. When the maintenance work is completed, the normal operation of the elevator apparatus 100 is started again. Here, the maintenance work may require replacement of the substrate. When the storage unit 16 is mounted on a substrate to be replaced, the data stored in the storage unit 16 is also erased due to the replacement of the substrate. If the monitoring data stored in the storage unit 16 is lost, there is a possibility that the monitoring data will affect the subsequent maintenance management.
Therefore, in the elevator apparatus 100 according to the present embodiment, when a failure that requires replacement of the substrate on which the storage unit 16 is mounted is detected in the failure detection process, a monitoring data retention process is performed in which the monitoring data stored in the storage unit 16 is temporarily retained in the remote maintenance server 30 of the maintenance company. In the elevator apparatus 100, after the maintenance work is completed, reserved data write-back processing for writing back the reserved monitoring data to the storage unit 16 is performed. According to such processing, when a failure occurs that requires replacement of the substrate, it is possible to prevent the accumulated monitoring data from being lost.
Fig. 4 is a flowchart showing a control routine of the monitor data retention process and the retained data write-back process executed in the control device of embodiment 1. In step S120 of the control routine shown in fig. 4, it is determined whether or not a fault code has been output in the fault detection processing. As a result, the control routine is ended when the trouble code is not output, and the process proceeds to the next step S122 when the trouble code is output.
In step S122, it is determined whether or not the detected failure is a failure to be replaced with the board including the storage unit 16, based on the outputted failure code. As a result, when the substrate including the storage unit 16 is not a replacement target, the control routine is ended. On the other hand, when it is determined in the process of step S122 that the substrate including the storage unit 16 is the replacement target, the process proceeds to the next step S124.
In step S124, the application for temporarily storing the monitoring data stored in the storage unit 16 in the remote maintenance server 30 of the maintenance company is notified. Here, the control device 10 notifies the remote maintenance server 30 of the maintenance company of the application via the communication device 20. In the processing of next step S126, the monitoring data stored in the storage unit 16 is transmitted to the remote maintenance server 30 via the communication device 20. The transmitted monitoring data is temporarily saved in the storage device of the remote maintenance server 30.
In next step S128, it is determined whether or not the elevator apparatus 100 has started the normal operation. When the substrate replacement work by the maintenance worker is completed, the operation of the stopped elevator apparatus 100 is resumed. Here, for example, it is determined whether or not the normal operation of the elevator apparatus 100 continues for a predetermined time. As a result, when the determination is not satisfied, the process of step S128 is repeatedly executed until the determination is satisfied.
When the determination in step S128 is established, the process proceeds to the next step S130. In step S130, the maintenance company is notified of an application for writing back the monitoring data that has been retained in the remote maintenance server 30. Here, the control device 10 notifies the remote maintenance server 30 of the maintenance company of the application via the communication device 20. In the processing of the next step S132, the control device 10 receives the monitoring data stored in the remote maintenance server 30 via the communication device 20. The received monitoring data is written back to the storage unit 16 of the control device 10.
According to the elevator apparatus 100 configured as described above, even when the substrate including the storage unit 16 is replaced, the monitoring data that has been stored in the storage unit can be prevented from being lost.
1-3. Modification of embodiment 1
The elevator apparatus 100 according to embodiment 1 may be modified as described below.
1-3-1. Control device 10
In the present embodiment, the operation control unit 12, the determination unit 14 including the failure detection unit 141 and the data control unit 142, the storage unit 16, and the interface unit 18 show functions of the control device 10. Fig. 5 is a diagram showing an example of hardware resources of the control device. The control device 10 includes, as hardware resources, a processing circuit 101 including a processor 102 and a memory 103. The function of the storage unit 16 is realized by the memory 103. The memory 103 is, for example, a semiconductor memory. The control device 10 realizes the functions of the operation control unit 12, the determination unit 14 including the failure detection unit 141 and the data control unit 142, the storage unit 16, and the interface unit 18 by the processor 102 executing the program stored in the memory 103.
Fig. 6 is a diagram showing another example of hardware resources of the control device. In the example shown in fig. 6, the control device 10 includes a processing circuit 101 including, for example, a processor 102, a memory 103, and dedicated hardware 104. Fig. 6 shows an example in which a part of the functions of the control device 10 is realized by dedicated hardware 104. All functions of the control device 10 may be realized by the dedicated hardware 104. The dedicated hardware 104 may be a single Circuit, a composite Circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. The above-described modification of the control device 10 can also be applied to the elevator apparatus 200 according to embodiment 2 described later.
1-3-2. Communication device 20
The function of the communication device 20 may be included in the control device 10 as the function of the control device 10.
1-3-3. Remote maintenance server 30
The retention destination of the monitoring data from the communication device 20 is not limited to the remote maintenance server 30 of the maintenance company. That is, the destination of the monitoring data may be any external device that is installed at a remote location from the point of the elevator apparatus 100 and is connected to the elevator apparatus 100 via a communication line.
Embodiment 2.
2-1 Structure of Elevator apparatus
Fig. 7 is a diagram showing an example of an elevator apparatus according to embodiment 2. An elevator apparatus 200 shown in fig. 7 is characterized by being provided with a maintenance point inspection device 40 in place of the communication device 20 of embodiment 1. In fig. 7, the same elements as those in the configuration shown in fig. 2 are denoted by the same reference numerals, and the description thereof is omitted.
The maintenance point inspection device 40 is an external device for performing maintenance point inspection of the elevator. The maintenance point inspection device 40 is connected to the control device 10 via a communication line. The maintenance inspection device 40 is installed at the same place as the elevator device 100. The communication line connecting the control device 10 and the maintenance point inspection device 40 is not limited.
The maintenance spot inspection device 40 includes an interface unit 42, a control unit 44, and a storage unit 46. The interface unit 42 transmits and receives monitoring data to and from the interface unit 18 of the control apparatus 10. The control unit 44 controls reading and writing of the monitoring data from the control device 10. The storage unit 46 accumulates the received monitoring data. The control unit 44 receives the monitoring data from the control device 10, for example, at a frequency of 1 month and 1 time. The maintenance company analyzes the monitoring data stored in the storage unit 46 by connecting the terminal to the maintenance point inspection device 40, for example.
2-2 actions of the elevator installation
The elevator apparatus 200 according to embodiment 2 performs a failure detection process, a monitoring data retention process, and a monitoring data restoration process. The failure detection process is the same as the failure detection process executed in the elevator apparatus according to embodiment 1. Hereinafter, the monitoring data retention process and the monitoring data recovery process executed in the elevator apparatus 200 according to embodiment 2 will be described.
2-2-1. Monitor data retention process and monitor data write-back process
In the elevator apparatus 200 according to embodiment 2, when a failure that requires replacement of the board on which the storage unit 16 is mounted is detected in the failure detection process, a monitoring data retention process is executed in which the monitoring data stored in the storage unit 16 is temporarily retained in the storage unit 46 of the maintenance point inspection device 40. In the elevator apparatus 200, after the maintenance work is completed, reserved data write-back processing for writing back the reserved monitoring data to the storage unit 16 of the control apparatus 10 is performed. According to such processing, when a failure occurs that requires replacement of the substrate, it is possible to prevent the accumulated monitoring data from being lost.
Fig. 8 is a flowchart showing a control routine of the monitor data retention process and the retained data write-back process executed in the control device of embodiment 2. In step S200 of the control routine shown in fig. 8, it is determined whether or not a fault code is output in the fault detection processing. As a result, the present control routine is ended when the trouble code is not output, and the process proceeds to the next step S202 when the trouble code is output.
In step S202, it is determined whether or not the detected failure is a failure to be replaced with the board including the storage unit 16, based on the outputted failure code. As a result, when the substrate including the storage unit 16 is not a replacement target, the control routine is ended. On the other hand, in the process of step S202, when the substrate including the storage unit 16 is to be replaced, the process proceeds to the next step S204.
In step S204, the monitoring data stored in the storage unit 16 is transmitted to the maintenance point inspection device 40. The transmitted monitoring data is temporarily stored in the storage unit 46 of the maintenance point inspection device 40.
In next step S206, it is determined whether or not the elevator apparatus 200 has started a normal operation. When the substrate replacement work by the maintenance worker is completed, the operation of the stopped elevator apparatus 200 is resumed. Here, for example, it is determined whether or not the normal operation of the elevator apparatus 200 has continued for a predetermined time. As a result, when the determination is not satisfied, the process of step S206 is repeatedly executed until the determination is satisfied.
When the determination of step S206 is established, the process proceeds to next step S208. In step S208, the control device 10 receives the monitoring data stored in the maintenance point inspection device 40. The received monitoring data is written back to the storage unit 16 of the control device 10.
According to the elevator apparatus 200 configured as described above, even when the substrate including the storage unit 16 is replaced, the loss of the monitoring data stored in the storage unit 16 can be prevented.
2-3 variation of embodiment 2
The elevator apparatus 200 according to embodiment 2 can be modified as described below.
2-3-1. Maintenance point inspection device 40
The holding destination of the monitoring data from the communication device 20 is not limited to the maintenance point inspection device 40. That is, the destination of the monitoring data may be any external device provided at the same location as the elevator apparatus 200 and connected to the elevator apparatus 200 via a communication line.
Description of the reference symbols
1: a car; 2: a counterweight; 3: a hoistway; 4: a main rope; 5: a traction machine; 6: a drive sheave; 8: a machine room; 10: a control device; 12: an operation control unit; 14: a determination unit; 16: a storage unit; 18: an interface section; 20: a communication device; 22: an interface section; 24: a control unit; 26: a communication unit; 30: a remote maintenance server; 40: maintaining the point inspection device; 42: an interface section; 44: a control unit; 46: a storage unit; 100: an elevator device; 101: a processing circuit; 102: a processor; 103: a memory; 104: dedicated hardware; 141: a failure detection unit; 142: a data control unit; 200: an elevator device.
Claims (5)
1. An elevator device, characterized in that the elevator device comprises:
an operation control unit for controlling the operation of the elevator;
a storage unit that accumulates the monitoring data of the elevator sequentially acquired by the operation control unit;
an interface unit connected to an external device via a communication line;
a failure detection unit that performs failure detection processing for detecting a failure of the elevator; and
and a data control unit that performs a monitoring data retention process of retaining the monitoring data stored in the storage unit in the external device when it is detected in the failure detection process that a failure requiring replacement of the storage unit exists.
2. Elevator arrangement according to claim 1,
the external device includes a remote maintenance server provided at a remote location different from a location of the elevator device,
the data control unit is configured to cause the remote maintenance server to retain the monitoring data in the monitoring data retention process.
3. Elevator arrangement according to claim 1,
the external device comprises a maintenance point inspection device which is arranged at the same place with the elevator device,
the data control unit is configured to retain the monitoring data in the maintenance point inspection device in the monitoring data retention process.
4. Elevator arrangement according to any one of claims 1-3,
the operation control unit is configured to perform an operation stop process of stopping a normal operation of the elevator when it is detected in the failure detection process that there is a failure requiring replacement of the storage unit.
5. Elevator arrangement according to any one of claims 1-4,
when the normal operation of the elevator is started after the monitoring data retention processing is performed, the data control unit executes monitoring data recovery processing of receiving the monitoring data that has been retained in the external device and writing the received monitoring data back to the storage unit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2020/009814 WO2021176715A1 (en) | 2020-03-06 | 2020-03-06 | Elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115380000A true CN115380000A (en) | 2022-11-22 |
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ID=77613968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080098107.8A Pending CN115380000A (en) | 2020-03-06 | 2020-03-06 | Elevator device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7082746B2 (en) |
| CN (1) | CN115380000A (en) |
| WO (1) | WO2021176715A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63310485A (en) * | 1987-06-12 | 1988-12-19 | 三菱電機株式会社 | Trouble analyzer for elevator |
| JP2002208079A (en) * | 2001-01-10 | 2002-07-26 | Toshiba Corp | Central monitor controller and local monitor controller |
| JP2006143449A (en) * | 2004-11-24 | 2006-06-08 | Mitsubishi Electric Corp | Elevator remote monitoring device |
| JP2008168976A (en) * | 2007-01-10 | 2008-07-24 | Hitachi Building Systems Co Ltd | Elevator remote monitoring device |
| WO2018122918A1 (en) * | 2016-12-26 | 2018-07-05 | 三菱電機株式会社 | Elevator control device |
| JP2019119580A (en) * | 2018-01-10 | 2019-07-22 | 株式会社日立ビルシステム | Elevator maintenance system and method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6026588A (en) * | 1983-07-22 | 1985-02-09 | 三菱電機株式会社 | Data recorder for elevator |
-
2020
- 2020-03-06 CN CN202080098107.8A patent/CN115380000A/en active Pending
- 2020-03-06 JP JP2022504938A patent/JP7082746B2/en active Active
- 2020-03-06 WO PCT/JP2020/009814 patent/WO2021176715A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63310485A (en) * | 1987-06-12 | 1988-12-19 | 三菱電機株式会社 | Trouble analyzer for elevator |
| JP2002208079A (en) * | 2001-01-10 | 2002-07-26 | Toshiba Corp | Central monitor controller and local monitor controller |
| JP2006143449A (en) * | 2004-11-24 | 2006-06-08 | Mitsubishi Electric Corp | Elevator remote monitoring device |
| JP2008168976A (en) * | 2007-01-10 | 2008-07-24 | Hitachi Building Systems Co Ltd | Elevator remote monitoring device |
| WO2018122918A1 (en) * | 2016-12-26 | 2018-07-05 | 三菱電機株式会社 | Elevator control device |
| JP2019119580A (en) * | 2018-01-10 | 2019-07-22 | 株式会社日立ビルシステム | Elevator maintenance system and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021176715A1 (en) | 2021-09-10 |
| JP7082746B2 (en) | 2022-06-09 |
| JPWO2021176715A1 (en) | 2021-09-10 |
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