WO2024257212A1 - かご位置検出装置及びエレベータ装置 - Google Patents

かご位置検出装置及びエレベータ装置 Download PDF

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Publication number
WO2024257212A1
WO2024257212A1 PCT/JP2023/021887 JP2023021887W WO2024257212A1 WO 2024257212 A1 WO2024257212 A1 WO 2024257212A1 JP 2023021887 W JP2023021887 W JP 2023021887W WO 2024257212 A1 WO2024257212 A1 WO 2024257212A1
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WIPO (PCT)
Prior art keywords
position information
unit
detection unit
car
reference position
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PCT/JP2023/021887
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English (en)
French (fr)
Japanese (ja)
Inventor
将史 松岡
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三菱電機ビルソリューションズ株式会社
三菱電機株式会社
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Application filed by 三菱電機ビルソリューションズ株式会社, 三菱電機株式会社 filed Critical 三菱電機ビルソリューションズ株式会社
Priority to PCT/JP2023/021887 priority Critical patent/WO2024257212A1/ja
Priority to JP2025526953A priority patent/JPWO2024257212A1/ja
Publication of WO2024257212A1 publication Critical patent/WO2024257212A1/ja

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    • 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
    • B66B3/02—Position or depth indicators

Definitions

  • This disclosure relates to a car position detection device and an elevator device.
  • a conventional car position detection device is equipped with a magnetic tape stretched between the ceiling of the elevator shaft and the pit floor, and a detection unit that is fixed to the car and reads the scale recorded on the magnetic tape.
  • the memory unit stores a table that records the magnetic scale value as the reference car position for each floor where the car lands (see, for example, Patent Document 1).
  • the present disclosure has been made to solve the above-mentioned problems, and aims to provide a car position detection device and elevator system that can correct information that correlates the position in the elevator shaft with the car position information after the medium is extended, expanded, or replaced.
  • the car position detection device includes a medium extending in the direction of movement of a car ascending and descending in a hoistway, a first detection unit fixed to the car and detecting car position information by reading the medium, a memory unit storing information associating a position in the hoistway with the car position information detected by the first detection unit as initial position information, a second detection unit fixed in the hoistway and detecting information detected by reading the medium at the fixed position as reference position information, and a correction unit correcting the initial position information when the reference position information detected by the second detection unit changes, based on the initial position information stored in the memory unit, the reference position information before the change detected by the second detection unit, and the reference position information after the change detected by the second detection unit.
  • the elevator device includes a car that moves up and down in a hoistway, a medium extending in the direction of the car's movement, a first detection unit that is fixed to the car and detects position information of the car by reading the medium, a memory unit that stores information that associates a position in the hoistway with the position information of the car detected by the first detection unit as initial position information, a second detection unit that is fixed in the hoistway and detects the information detected by reading the medium at the fixed position as reference position information, and a correction unit that corrects the initial position information when the reference position information detected by the second detection unit changes, based on the initial position information stored in the memory unit, the reference position information before the change detected by the second detection unit, and the reference position information after the change detected by the second detection unit.
  • the present disclosure provides a car position detection device and elevator device that can correct information that correlates the position in the elevator shaft with the car's position information after the medium is extended, expanded, or replaced.
  • FIG. 2 is a side view of the elevator apparatus according to the first embodiment.
  • FIG. 2 is a front view of an operation unit according to the first embodiment.
  • FIG. 2 is a block diagram showing a control device according to the first embodiment.
  • 5 is a flowchart showing a process of a position information management unit of the control device in the first embodiment.
  • a diagram showing the distances from the first floor to other floors stored in a memory unit in embodiment 1.
  • 5 is a diagram showing initial position information stored in a storage unit in the first embodiment.
  • FIG. 11A and 11B are diagrams showing corrected position information stored in a storage unit in the first embodiment when the magnetic tape expands or contracts.
  • 11 is a diagram showing corrected position information when the magnetic tape stored in the storage unit in the first embodiment is replaced.
  • FIG. 13 is a diagram showing corrected position information stored in a storage unit in a modification of the first embodiment when the magnetic tape expands or contracts.
  • FIG. 2 is a diagram illustrating a configuration example of a processing circuit of the
  • Embodiment 1 The car position detection device and elevator device according to the first embodiment will be described in detail below. Note that the same reference numerals in the various drawings represent the same or equivalent components.
  • the elevator system includes a car 1, a counterweight 2, a main rope 3, a car guide rail 4, a counterweight guide rail 5, a hoist 6, a deflector pulley 7, a spring 8, a magnetic tape 9, a first detection unit 10, a second detection unit 11, an operation unit 12, and a control device 20.
  • the car position detection device in this embodiment includes the magnetic tape 9, the first detection unit 10, the second detection unit 11, and a position information management unit 30, which will be described later. Note that the operation unit 12 is not shown in FIG. 1.
  • a car 1 and a counterweight 2 are provided in the hoistway 100.
  • the car 1 is connected to one end of a main rope 3, and moves up and down in the hoistway 100 along a car guide rail 4 that extends vertically.
  • the counterweight 2 is connected to the other end of the main rope 3, and moves up and down in the hoistway 100 along a counterweight guide rail 5 that extends vertically.
  • the main rope 3 is wound around a sheave 6a and a deflector sheave 7 of the hoisting machine 6.
  • a machine room 101 is provided at the top of the elevator shaft 100.
  • a hoist 6 and a deflector sheave 7 are provided in the machine room 101.
  • the hoist 6 has a sheave 6a and a motor (not shown), and the motor rotates the sheave 6a.
  • the magnetic tape 9, which is the medium, is provided in the elevator 100 so as to extend along the direction of movement of the car 1. Specifically, one end of the magnetic tape 9 is fixed to the ceiling of the elevator 100, and the other end is connected to a spring 8 provided on the bottom surface of the elevator 100. The direction of movement of the car 1 is the vertical direction. Code information is recorded on the magnetic tape 9, and the magnetic tape 9 is provided so that the value of the code information increases from the bottom to the top in the vertical direction.
  • the magnetic tape 9 may be attached in the opposite direction.
  • the magnetic tape 9 may also be fixed to the ceiling of the elevator 100 via a metal fitting such as a bracket.
  • the first detection unit 10 is fixed to the car 1 and detects the position information of the car 1 by reading the code information recorded on the magnetic tape 9.
  • the first detection unit 10 is, for example, a magnetic sensor.
  • the first detection unit 10 outputs the position information of the car 1 to the acquisition unit 31 described later via an input/output interface (not shown).
  • the second detection unit 11 is fixed within the elevator shaft 100. Specifically, the second detection unit 11 is fixed to the car guide rail 4, and is preferably fixed below the midpoint of the movable range of the car 1 in the moving direction of the car 1. For example, when the car 1 can move from an upper end switch (not shown) located above the top floor to a lower end switch (not shown) located below the bottom floor, the movable range of the car 1 is the range from the upper end switch to the lower end switch. The second detection unit 11 is fixed below the midpoint of that range, that is, on the lower end switch side.
  • the second detection unit 11 is fixed in the vicinity of the lowest floor on which car 1 can land.
  • the vicinity of the lowest floor is, for example, the range from the floor one level below the lowest floor to the floor one level above the lowest floor.
  • the vicinity of the lowest floor is, for example, the range from the pit to the floor one level above the lowest floor.
  • the lowest floor on which car 1 can land is also simply referred to as the lowest floor.
  • the second detection unit 11 detects information detected by reading code information recorded on the magnetic tape 9 at a fixed position of the second detection unit 11 as reference position information.
  • the second detection unit 11 is, for example, a magnetic sensor.
  • the second detection unit 11 outputs the reference position information to the acquisition unit 31 described later via an input/output interface (not shown).
  • the operation unit 12 is provided, for example, in the car 1 and is connected to the control device 20 by wire. As shown in FIG. 2, the operation unit 12 has a changeover switch 12a, an up button 12b, a down button 12c, and a registration button 12d.
  • the changeover switch 12a is a switch for switching the operation mode of car 1.
  • the operation unit 12 When the changeover switch 12a is switched from the normal operation mode to the inspection operation mode by an operator, the operation unit 12 outputs an inspection operation signal, which is an electrical signal indicating that the operation mode of car 1 is to be switched to the inspection operation mode, to the control unit 40 described later. Also, when the changeover switch 12a is switched from the inspection operation mode to the normal operation mode by an operator, the operation unit 12 outputs a normal operation signal, which is an electrical signal indicating that the operation mode of car 1 is to be switched to the normal operation mode, to the control unit 40 described later.
  • the operation unit 12 outputs an up signal, which is an electrical signal indicating that the car 1 should be moved upward, to the control unit 40 (described later) only while the worker is pressing the up button 12b.
  • the operation unit 12 also outputs a down signal, which is an electrical signal indicating that the car 1 should be moved downward, to the control unit 40 (described later) only while the worker is pressing the down button 12c.
  • the registration button 12d When the worker presses the registration button 12d, the operation unit 12 outputs a registration signal, which is an electrical signal indicating that the initial position (described later) should be registered, to the registration unit 34 (described later).
  • the control device 20 is a device such as a control board that is composed of a processor including a semiconductor integrated circuit, a memory, and an input/output interface, and controls the entire elevator device. An example of the configuration of the processing circuit of the control device 20 will be described later. As shown in FIG. 3, the control device 20 includes a position information management unit 30 and a control unit 40.
  • the location information management unit 30 has an acquisition unit 31, a correction unit 32, a determination unit 33, a registration unit 34, and a storage unit 35.
  • the acquisition unit 31 has a software module that acquires the position information of the cage 1 from the first detection unit 10 and the reference position information from the second detection unit 11.
  • the correction unit 32 includes a software module that corrects the initial position information, which will be described later, based on the initial position information, the reference position information before the change, and the reference position information after the change, which will be described later.
  • the determination unit 33 includes a software module that determines whether the reference position information has changed.
  • the determination unit 33 also includes a software module that determines whether the reference position information has changed due to expansion or contraction of the magnetic tape 9, or due to replacement of the magnetic tape 9.
  • the registration unit 34 includes a software module that registers the initial location information described below.
  • the registration unit 34 also includes a software module that registers the reference location information acquired by the acquisition unit 31.
  • the memory unit 35 is a storage device composed of a volatile or non-volatile memory.
  • the memory unit 35 stores information associating each floor with an initial position as initial position information.
  • the memory unit 35 also stores information associating each floor with a corrected position as corrected position information.
  • the memory unit 35 also stores reference position information. Furthermore, the memory unit 35 pre-stores the distance from the reference floor to other floors that are floors other than the reference floor.
  • the reference floor and other floors are floors on which the car 1 can land. In this embodiment, the reference floor is the lowest floor.
  • the control unit 40 is equipped with a software module that controls the movement of car 1 in an operation mode selected by the changeover switch 12a of the operation unit 12.
  • the normal operation mode is a normal mode selected for the movement of users, and is an operation mode in which car 1 is moved according to call registration.
  • the inspection operation mode is a mode selected during maintenance inspection, and is an operation mode in which car 1 is moved according to manual operation by an operator.
  • the control unit 40 also has a software module that notifies the determination unit 33 of the operation mode of car 1.
  • FIG. 4 is a flowchart showing the processing of the control device 20.
  • step S1 the registration unit 34 registers the initial position information.
  • the registration unit 34 stores information associating each floor with the initial position in the storage unit 35 as the initial position information.
  • an operator switches the operation mode of car 1 to the inspection operation mode using the changeover switch 12a of the operation unit 12, and presses the up button 12b or the down button 12c to move car 1 to the lowest floor, which is the reference floor.
  • the control unit 40 controls the movement of car 1 in the inspection operation mode. While the control unit 40 is receiving an up signal or down signal output from the operation unit 12, it controls the hoist 6 to raise or lower car 1.
  • the worker presses the registration button 12d on the operation unit 12.
  • the operation unit 12 outputs a registration signal to the registration unit 34.
  • the registration unit 34 receives the registration signal, it associates the position information of car 1 acquired by the acquisition unit 31 with the lowest floor as an initial position and stores it in the memory unit 35.
  • the registration unit 34 stores initial position information in the storage unit 35 based on the initial position corresponding to the lowest floor and the distance from the lowest floor to the other floors stored in advance in the storage unit 35.
  • the storage unit 35 stores the distance from the 1st floor, which is the lowest floor, to the other floors.
  • the left column of FIG. 5 shows the other floors, which are the 2nd floor to the 5th floor, and the right column shows the distance from the 1st floor to the other floors.
  • the distance from the 1st floor to the 2nd floor is 3 m
  • the distance from the 1st floor to the 3rd floor is 6 m
  • the distance from the 1st floor to the 4th floor is 9 m
  • the distance from the 1st floor to the 5th floor is 12 m, which are stored in the storage unit 35.
  • the registration unit 34 adds these values to calculate the initial position corresponding to the 2nd floor. As shown in FIG. 6, the registration unit 34 stores the initial position corresponding to the 2nd floor, which is 7 m, in the storage unit 35.
  • the initial position is calculated based on the position information of car 1 detected by the first detection unit 10 and the distance from the reference floor to the other floors stored in the memory unit 35.
  • the first detection unit 10 can detect the position information of car 1 on the reference floor, it is possible to calculate the initial position corresponding to the other floors without detecting the position information of car 1 on the other floors.
  • the initial position information can be quickly registered.
  • step S2 the registration unit 34 registers the reference position information acquired by the acquisition unit 31. Specifically, the acquisition unit 31 acquires the reference position information detected by the second detection unit 11. The registration unit 34 stores this reference position information in the storage unit 35 as the reference position information before the change.
  • the worker After the initial position information and the reference position information before the change are registered, the worker switches the operation mode of car 1 to the normal operation mode using the changeover switch 12a of the operation unit 12.
  • the worker may switch the operation mode of car 1 to the inspection operation mode using the changeover switch 12a.
  • step S3 the determination unit 33 determines whether the reference position information has changed. Specifically, the acquisition unit 31 periodically acquires the reference position information detected by the second detection unit 11. The determination unit 33 compares the reference position information acquired by the acquisition unit 31 in step S3 with the reference position information before the change stored in the storage unit 35. When the reference position information acquired by the acquisition unit 31 in step S3 is different from the reference position information before the change, the determination unit 33 determines that the reference position information has changed, and proceeds to step S4. When the reference position information acquired by the acquisition unit 31 in step S3 is equal to the reference position information before the change, the determination unit 33 determines that the reference position information has not changed, and proceeds to step S3.
  • the determination unit 33 may determine that the reference position information has changed when there is a difference between the reference position information acquired by the acquisition unit 31 in step S3 and the reference position information before the change that is equal to or greater than a predetermined threshold.
  • the acquisition unit 31 may acquire the reference position information irregularly rather than periodically.
  • step S4 the registration unit 34 registers the reference position information acquired by the acquisition unit 31. Specifically, the acquisition unit 31 acquires the reference position information detected by the second detection unit 11. The registration unit 34 stores this reference position information in the storage unit 35 as the changed reference position information.
  • step S5 the determination unit 33 determines whether the reference position information has changed due to expansion or contraction of the magnetic tape 9, or due to replacement of the magnetic tape 9. Specifically, the control unit 40 notifies the determination unit 33 of the operation mode of car 1.
  • the determination unit 33 determines that the reference position information has changed due to expansion or contraction of the magnetic tape 9, and proceeds to step S6.
  • the determination unit 33 determines that the reference position information has changed due to replacement of the magnetic tape 9, and proceeds to step S7.
  • step S6 the correction unit 32 corrects the initial position information based on the initial position information, the reference position information before the change, the reference position information after the change, and the distance from one end of the magnetic tape 9 to the second detection unit 11 in the moving direction of the car 1.
  • the correction of the initial position information is performed when the magnetic tape 9 expands or contracts.
  • the correction unit 32 calculates a corrected position by correcting the initial position corresponding to each floor from the initial position information, and stores information correlating each floor with the corrected position in the memory unit 35 as corrected position information.
  • the corrected position information is information obtained by correcting the initial position information.
  • the formula for calculating the corrected position to correct the initial position information is shown below.
  • the amount of change in the reference position information " ⁇ x” is calculated by subtracting the reference position information "x1" before the change from the reference position information "x2" after the change. As shown in Equation 2, the amount of change in the reference position information " ⁇ x” is added to the distance "L” from one end of the magnetic tape 9 to the second detection unit 11 in the vertical direction, then divided by the distance "L” and multiplied by the initial position "a", to calculate the corrected position "a'".
  • the correction unit 32 calculates the amount of change ⁇ x in the reference position information to be 0.2 m using Equation 1.
  • the correction unit 32 calculates the corrected position a' corresponding to the first floor using formula 2. As shown in FIG. 6, the initial position a corresponding to the first floor is 4 m. The correction unit 32 calculates the corrected position a' corresponding to the first floor to be 4.04 m using formula 2. The corrected positions a' corresponding to the other floors can also be calculated in a similar manner using formula 2. After calculating the corrected position, the correction unit 32 stores information associating each floor with the corrected position in the memory unit 35 as corrected position information, as shown in FIG. 7. Then, the process ends.
  • step S7 the correction unit 32 corrects the initial position information based on the initial position information, the reference position information before the change, and the reference position information after the change.
  • step S7 the correction of the initial position information when the magnetic tape 9 is replaced is performed. Specifically, the correction unit 32 calculates a corrected position by correcting the initial position corresponding to each floor from the initial position information, and stores information correlating each floor with the corrected position in the storage unit 35 as corrected position information.
  • the corrected position information is information obtained by correcting the initial position information.
  • the formula for calculating the corrected position to correct the initial position information is shown below.
  • the corrected position "a'" is calculated by subtracting the reference position information "x1" before the change from the initial position "a” and then adding the reference position information "x2" after the change.
  • the correction unit 32 calculates the corrected position a' corresponding to the first floor using Equation 3. As shown in FIG. 6, the initial position a corresponding to the first floor is 4 m. The correction unit 32 calculates the corrected position a' corresponding to the first floor to be 4 m using Equation 3. The corrected positions a' corresponding to other floors can also be calculated in a similar manner using Equation 3. After calculating the corrected position, the correction unit 32 stores information associating each floor with the corrected position in the memory unit 35 as corrected position information, as shown in FIG. 8. Then, the process ends.
  • the control unit 40 controls the movement of the cage 1 using corrected position information, which is information obtained by correcting the initial position information.
  • the car position detection device and elevator device include a second detection unit that is fixed in the elevator shaft 100 and detects information detected by reading the magnetic tape 9 at the fixed position as reference position information, and a correction unit 32 that corrects the initial position information when the reference position information detected by the second detection unit 11 changes, based on the initial position information stored in the memory unit 35, the reference position information before the change detected by the second detection unit 11, and the reference position information after the change detected by the second detection unit 11. Therefore, the initial position information can be corrected after the magnetic tape 9 is extended or contracted or replaced. Then, the control unit 40 controls the movement of the car 1 using the corrected position information, which is information obtained by correcting the initial position information, thereby preventing the car 1 from moving to a position deviated from the expected position.
  • the second detection unit 11 is fixed below the midpoint of the movable range of the car 1 in the moving direction of the car 1. Compared to when the second detection unit 11 is fixed above the midpoint, the amount of change in the reference position information when the magnetic tape 9 expands or contracts tends to be larger. Therefore, the influence of measurement errors that depend on the equipment used as the second detection unit 11 can be suppressed. Furthermore, when the second detection unit 11 is fixed near the lowest floor, the influence of measurement errors that depend on the equipment used as the second detection unit 11 can be further suppressed.
  • the car position detection device and elevator device include a determination unit 33 that determines whether the reference position information has changed due to expansion or contraction of the magnetic tape 9 or due to replacement of the magnetic tape 9.
  • the initial position information can be appropriately corrected based on the determination result of the determination unit 33.
  • the medium may have optical characteristics, mechanical shapes or properties, a geometric pattern shape represented on the surface, etc.
  • the first detection unit 10 and the second detection unit 11 may be an image sensor, a magnetostrictive sensor, an optical sensor, etc.
  • the operation unit 12 may also be connected to the control device 20 wirelessly.
  • the operation unit 12 may be a mobile terminal such as a smartphone.
  • the operation unit 12 may output an electrical signal such as a registration signal by infrared rays. Furthermore, the operation unit 12 does not have to be provided in the car 1. If the elevator device is not provided with the operation unit 12, for example, the control device 20 may have a changeover switch 12a, an up button 12b, a down button 12c, and a registration button 12d.
  • the position information management unit 30 may also be provided in other equipment of the elevator system.
  • the reference floor may be a floor other than the lowest floor.
  • the registration unit 34 may register the initial position information based only on the position information of the car 1, without using the distance from the reference floor to the other floors. Specifically, an operator may move the car 1 using the operation unit 12 and stop it at each floor in order, and the position information of the car 1 detected by the first detection unit 10 in the stopped state may be stored in the memory unit 35 as the initial position corresponding to each floor.
  • the corrected position may be calculated using the following formula 4 instead of formulas 1 and 2.
  • the correction unit 32 may correct the initial position information based on the initial position information, the reference position information before the change, the reference position information after the change, and the total length of the magnetic tape 9 when the magnetic tape 9 is installed in the elevator shaft 100.
  • the corrected position "a'" is calculated by subtracting the reference position information "x1" before the change from the total length "D" of the magnetic tape 9 when the magnetic tape 9 is installed in the elevator 100, dividing the result by the value obtained by subtracting the reference position information "x2" after the change from the total length "D", and then multiplying the result by the initial position "a".
  • the correction unit 32 calculates the corrected position a' corresponding to the first floor using Equation 4. As shown in FIG. 6, the initial position a corresponding to the first floor is 4 m. The correction unit 32 calculates the corrected position a' corresponding to the first floor to be 4.04 m using Equation 3. The corrected positions a' corresponding to the other floors can be calculated in the same manner using Equation 4. After calculating the corrected position, the correction unit 32 stores information associating each floor with the corrected position in the memory unit 35 as corrected position information, as shown in FIG. 9.
  • the formulas for calculating the corrected position when the magnetic tape 9 expands or contracts or when the magnetic tape 9 is replaced are not limited to formulas 1 to 4.
  • the corrected position may be calculated using a formula that takes into account the temperature distribution in the elevator 100 or the strength of the magnetic tape 9.
  • the corrected position information does not have to be stored in the memory unit 35.
  • the corrected position corresponding to each floor may be calculated sequentially, and the initial position information may be corrected.
  • Figure 10 is a diagram showing an example of the configuration of the processing circuit of the control device 20 in embodiment 1.
  • Each function of the control device 20 can be realized by a processing circuit.
  • the processing circuit includes at least one processor 51 and at least one memory 52.
  • the processing circuit includes at least one dedicated hardware 53.
  • each function of the control device 20 is realized by software, firmware, or a combination of software and firmware. At least one of the software and firmware is written as a program. At least one of the software and firmware is stored in at least one memory 52.
  • the at least one processor 51 realizes the functions of the control device 20 by reading and executing the program stored in the at least one memory 52.
  • the at least one processor 51 is also called a CPU, central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP.
  • the at least one memory 52 is a non-volatile or volatile semiconductor memory such as a RAM, ROM, flash memory, EPROM, or EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, or the like.
  • a non-volatile or volatile semiconductor memory such as a RAM, ROM, flash memory, EPROM, or EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, or the like.
  • the processing circuit includes at least one dedicated hardware 53, the processing circuit is realized, for example, by a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination of these.
  • Each function of the control device 20 may be realized by a separate processing circuit, or all the functions of the control device 20 may be realized together by a single processing circuit.
  • control device 20 may be realized by dedicated hardware 53, and other parts may be realized by software or firmware.
  • the processing circuitry realizes each function of the control device 20 using hardware 53, software, firmware, or a combination of these.

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PCT/JP2023/021887 2023-06-13 2023-06-13 かご位置検出装置及びエレベータ装置 WO2024257212A1 (ja)

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JP2025526953A JPWO2024257212A1 (enrdf_load_stackoverflow) 2023-06-13 2023-06-13

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57500241A (enrdf_load_stackoverflow) * 1980-02-08 1982-02-12
JP2021066567A (ja) * 2019-10-24 2021-04-30 株式会社日立ビルシステム エレベータ装置
WO2022085124A1 (ja) * 2020-10-21 2022-04-28 三菱電機株式会社 エレベーター装置
WO2022190343A1 (ja) * 2021-03-12 2022-09-15 三菱電機株式会社 エレベータシステム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57500241A (enrdf_load_stackoverflow) * 1980-02-08 1982-02-12
JP2021066567A (ja) * 2019-10-24 2021-04-30 株式会社日立ビルシステム エレベータ装置
WO2022085124A1 (ja) * 2020-10-21 2022-04-28 三菱電機株式会社 エレベーター装置
WO2022190343A1 (ja) * 2021-03-12 2022-09-15 三菱電機株式会社 エレベータシステム

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