WO2022254488A1

WO2022254488A1 - Elevator system

Info

Publication number: WO2022254488A1
Application number: PCT/JP2021/020616
Authority: WO
Inventors: 大地山下; 然一伊藤; 英一齊藤
Original assignee: 三菱電機株式会社
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-12-08

Abstract

In this elevator system, a swing amount estimation unit derives, on the basis of the acceleration produced in a building, an estimated value of the magnitude of swinging of an object to be assessed when a cage is positioned at a specific position. A driving control unit sets a driving mode to a controlled operation mode when it is assessed that the estimated value of the magnitude of swinging produced in the object to be assessed is equal to or greater than a first swing amount threshold value and the cage is positioned within a resonance region.

Description

elevator system

This disclosure relates to an elevator system.

　Conventional elevator control devices estimate the amount of rope swing based on the amount of shaking of the building detected by the acceleration sensor and the position of the car. Then, when the estimated swing amount of the rope is equal to or greater than the set value, the rope damping operation is performed. A rope damping operation is an operation that moves the car to a damping floor. A damping floor is a floor capable of damping the swing of a rope (see Patent Literature 1, for example).

JP 2013-209209 A

In the conventional elevator control device as described above, the amount of rope deflection is estimated using two variables, the value detected by the acceleration sensor and the position of the car in real time. For this reason, complicated calculations are required in order to determine whether or not the rope damping operation is necessary.

The present disclosure has been made to solve the problems described above, and aims to obtain an elevator system that can simplify the determination of the necessity of controlled operation.

An elevator system according to the present disclosure includes an elevator system main body having an elevator apparatus provided in a building, and a swing amount estimating section, the elevator apparatus being connected to a car and a flexible and an operation control unit that controls the operation of the car in a plurality of operation modes including a normal operation mode and a control operation mode. A first sway amount threshold, which is a criterion for determining the magnitude of the sway of the object to be determined, is set in the section, and the operation control unit has a A certain resonance region is set, and the swaying amount estimator obtains an estimated value of the swaying magnitude of the object to be determined when the car is positioned at a specific position based on the acceleration generated in the building. The operation control unit determines whether the estimated value is equal to or greater than the first sway amount threshold and the car is positioned within the resonance region. , the operation mode shall be the control operation mode.

According to the elevator system of the present disclosure, it is possible to easily determine the necessity of controlled operation.

1 is a schematic configuration diagram showing an elevator system according to Embodiment 1; FIG. 2 is a block diagram showing a shake amount estimator in FIG. 1; FIG. FIG. 2 is a block diagram showing an operation control unit in FIG. 1; FIG. FIG. 5 is an explanatory diagram showing a setting example of a rope resonance region; It is a graph which shows an example of the setting method of a rope resonance area|region. FIG. 3 is a flowchart showing a building shaking monitoring operation by the shaking amount estimator of FIG. 2; FIG. FIG. 4 is a flow chart showing operation mode switching operation by the operation control unit of FIG. 3 ; FIG. FIG. 2 is a schematic configuration diagram showing an elevator system according to Embodiment 2; FIG. 9 is a block diagram showing a control system of the elevator system of FIG. 8; FIG. 14 is a flow chart showing a building shaking monitoring operation by a shaking amount estimating unit of Embodiment 3. FIG. 10 is a flow chart showing an operation mode switching operation by an operation control unit of Embodiment 3. FIG. FIG. 2 is a configuration diagram showing a first example of a processing circuit that realizes functions of an operation control unit and a shake amount estimation unit according to Embodiments 1 to 3; FIG. 7 is a configuration diagram showing a second example of a processing circuit that realizes each function of the operation control section and the shake amount estimation section of Embodiments 1 to 3;

Embodiments will be described below with reference to the drawings.
Embodiment 1.
FIG. 1 is a schematic configuration diagram showing an elevator system according to Embodiment 1. FIG. In FIG. 1, a building 50 is provided with a hoistway 51 and a machine room 52 . The machine room 52 is provided above the hoistway 51 .

An acceleration sensor 53 is provided in the machine room 52 . The acceleration sensor 53 detects acceleration generated in the building 50 when the building 50 shakes due to an earthquake or strong wind, for example.

The elevator system of Embodiment 1 includes an elevator system main body 30, a swing amount estimator 25, and an acceleration sensor 53. Elevator system body 30 is provided in building 50 . The elevator system main body 30 of Embodiment 1 has one elevator device 31 . That is, the elevator system main body 30 of Embodiment 1 is composed of only one elevator device 31 .

The elevator device 31 includes a hoisting machine 11, a deflector wheel 13, a plurality of main ropes 14, a car 15, a counterweight 16, a plurality of compensating ropes 17, a first balancing wheel 18, a second balancing wheel 19, It has a speed governor 20 , a speed governor rope 22 , a pulley 23 , and an operation control section 24 .

The hoist 11 is provided in the machine room 52. The hoisting machine 11 also has a drive sheave 12, a hoisting machine motor (not shown), and a hoisting machine brake (not shown). A hoist motor rotates the drive sheave 12 . The hoist brake keeps the drive sheave 12 stationary. The hoist brake also brakes the rotation of the drive sheave 12 .

A plurality of main ropes 14 are wound around the drive sheave 12 and the deflector wheel 13 . In FIG. 1 only one main rope 14 is shown. The cage 15 is connected to first ends of the main ropes 14 . A counterweight 16 is connected to the second ends of the plurality of main ropes 14 .

The car 15 and the counterweight 16 are suspended in the hoistway 51 by a plurality of main ropes 14. Further, the car 15 and the counterweight 16 move up and down in the hoistway 51 by rotating the drive sheave 12 .

A pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are installed in the hoistway 51 . A pair of car guide rails guides the car 15 to move up and down. A pair of counterweight guide rails guide the lifting and lowering of the counterweight 16 .

A plurality of compensating ropes 17 are suspended between the lower part of the cage 15 and the lower part of the counterweight 16. In FIG. 1 only one compen rope 17 is shown. The compensating ropes 17 compensate for the weight imbalance of the main ropes 14 on one side of the drive sheave 12 and the other.

The first balance wheel 18 and the second balance wheel 19 are provided at the bottom of the hoistway 51 . A plurality of compensating ropes 17 are wound around the first balance wheel 18 and the second balance wheel 19 . The first balance wheel 18 and the second balance wheel 19 apply tension to the plurality of compen ropes 17 .

The speed governor 20 is provided in the machine room 52. The speed governor 20 also monitors whether the speed of the car 15 has reached an excessive speed. Further, the governor 20 has a governor sheave 21 .

The governor rope 22 is wound around the governor sheave 21 . Also, the speed governor rope 22 is looped in the hoistway 51 and connected to the car 15 . The tension pulley 23 is provided at the bottom of the hoistway 51 . A governor rope 22 is wound around the pulley 23 .

When the car 15 ascends and descends, the governor rope 22 circulates and the governor sheave 21 rotates at a rotational speed corresponding to the running speed of the car 15 .

A plurality of main ropes 14, a plurality of compensating ropes 17, and a governor rope 22 are each connected to the car 15. Moreover, each of the plurality of main ropes 14, the plurality of compensating ropes 17, and the governor rope 22 is a long object having flexibility.

The operation control unit 24 is provided in the machine room 52. The operation control unit 24 also controls the operation of the car 15 by controlling the hoist 11 . Further, the operation control unit 24 controls operation of the car 15 in a plurality of operation modes. The multiple operating modes include a normal operating mode and a controlled operating mode.

The normal operation mode is a mode in which the car 15 is normally operated. Normal operation is an operation method in which the car 15 is automatically moved to a destination floor in response to calls from within the car 15 and calls from a plurality of halls.

The control operation mode is an operation mode in which the car 15 is operated under control. Controlled operation is a driving method for suppressing shaking of a determination target. A determination target is a rope connected to the car 15 . In Embodiment 1, it is assumed that all the main ropes 14 sway in the same manner, and one of the plurality of main ropes 14 is used as the determination target.

In the controlled operation mode, the operation control unit 24, for example, stops the car 15 at the nearest floor and moves the car 15 to the evacuation floor after the passengers get off. The evacuation floor is a floor on which the object to be determined is less likely to resonate due to shaking of the building 50 . Alternatively, in the controlled operation mode, the operation control unit 24 may, for example, stop the car 15 at the nearest floor and suspend the operation of the car 15 .

The shaking amount estimator 25 is provided in the machine room 52 . A detection signal from the acceleration sensor 53 is also input to the shake amount estimation unit 25 .

FIG. 2 is a block diagram showing the shake amount estimation unit 25 of FIG. The shake amount estimating unit 25 has an estimated value calculating unit 25a, a comparing unit 25b, and a reporting unit 25c as functional blocks.

Based on the acceleration generated in the building 50, that is, the acceleration detected by the acceleration sensor 53, the estimated value calculation unit 25a calculates an estimated value of the magnitude of the shaking of the determination object when the car 15 is positioned at a specific position. Ask for The magnitude of the shaking of the determination target is the amplitude of the determination target in the horizontal direction.

The magnitude of the swing of the determination target changes depending on the position of the car 15 to which the determination target is connected. Also, the determination target resonates when the natural period of the building 50 and the natural period of the determination target are close to each other. Resonance of the determination target increases the magnitude of shaking of the determination target.

The estimated value calculation unit 25a does not use the real-time car position as a variable, and obtains the estimated value by assuming that the car 15 is positioned at the position where the shaking of the object to be determined due to the shaking of the building 50 is greatest. That is, the specific position in the first embodiment is the car position where the shaking of the determination object caused by the shaking of the building 50 is the largest.

The magnitude of the shaking of the determination target caused by the shaking of the building 50 can be calculated using a functional expression. Since the specific calculation method is publicly known, the description thereof is omitted here.

A first shake amount threshold is set in the comparison unit 25b. The first shake amount threshold is a criterion for determining the magnitude of shake of the object to be determined. The comparison unit 25b determines whether the estimated value calculated by the estimated value calculation unit 25a is greater than or equal to the first shake amount threshold.

The notification unit 25c notifies the operation control unit 24 of the determination result by the comparison unit 25b when the estimated value is greater than or equal to the first shaking amount threshold.

FIG. 3 is a block diagram showing the operation control section 24 of FIG. The operation control unit 24 has, as functional blocks, a reception unit 24a, a car position determination unit 24b, and a mode switching unit 24c. The receiving unit 24a receives a report from the shake amount estimating unit 25. FIG.

A rope resonance area is set as a resonance area in the car position determination unit 24b. The rope resonance area is a part of the moving area of the car 15 and includes the car position where the object to be determined resonates due to the shaking of the building 50 . The car position determination unit 24b determines whether or not the car 15 is positioned within the rope resonance region.

The mode switching unit 24c switches the operation mode from the normal operation mode when the swing amount estimating unit 25 determines that the estimated value is equal to or greater than the first swing amount threshold and the car 15 is positioned within the rope resonance region. Switch to controlled operation mode.

For example, when the rope resonance area is set to the area from the 3rd floor to the 7th floor of the building 50, when the car 15 is located on the 5th floor, the operation control unit 24 receives the notification from the shaking amount estimation unit 25 is received, the operation mode is switched to the control operation mode. On the other hand, when the car 15 is located on the 10th floor and the operation control unit 24 receives the report from the sway amount estimation unit 25, the normal operation mode is continued.

FIG. 4 is an explanatory diagram showing a setting example of the rope resonance area. Four cages 15 are shown in FIG. 4 for explanation. The rope resonance area in the example of FIG. 4 is set on the middle floor of the building 50 . When the building 50 shakes, the second cage 15 from the right out of the four cages 15 is located within the rope resonance area, so the corresponding object to be determined, that is, the main rope 14 resonates. It is thought that there are

FIG. 5 is a graph showing an example of how to set the rope resonance region. In FIG. 5, L is the length of the object to be judged from the drive sheave 12 to the car 15 . ωb is the natural frequency of the building 50; ωn is the natural frequency of the determination object.

The horizontal axis of FIG. 5 is the ratio between the natural frequency of the building 50 and the natural frequency of the object to be determined, that is, the frequency ratio. The frequency ratio is a function of car position. When the natural frequency of the building 50 and the natural frequency of the object to be determined match, the frequency ratio is 1 and the object to be determined resonates.

Therefore, the rope resonance region is set so as to include the cage position where the frequency ratio is 1. As shown in FIG. 5, a car movement region in which the resonance magnification is equal to or greater than the set value X is set as the rope resonance region.

It should be noted that the number of rope resonance regions set in one elevator device 31 is not limited to one, and two or more may be set.

Also, the object to be determined is not limited to one of the plurality of main ropes 14. For example, when the swaying of a plurality of compensating ropes 17 is also taken into consideration, one of the compensating ropes 17 may be used as the determination target. Also, the speed governor rope 22 may be used as the determination object. Two or more rope resonance regions may be set for each type of determination object.

FIG. 6 is a flow chart showing the building shaking monitoring operation by the shaking amount estimation unit 25 of FIG. The shake amount estimator 25 periodically executes the process of FIG.

First, in step S101, the shaking amount estimation unit 25 confirms whether or not the shaking of the building 50 is detected by the acceleration sensor 53. If the shaking of the building 50 is not detected, the shaking amount estimator 25 terminates the processing for that round.

When the shaking of the building 50 is detected, the shaking amount estimation unit 25 calculates an estimated value of the shaking magnitude occurring in the determination target in step S102.

Subsequently, in step S103, the shake amount estimation unit 25 determines whether the calculated estimated value is greater than or equal to the first shake amount threshold. If the estimated value is less than the first shake amount threshold, the shake amount estimator 25 terminates the processing for that round.

If the estimated value is greater than or equal to the first shaking amount threshold, the shaking amount estimation unit 25 notifies the operation control unit 24 of the determination result in step S104, and then terminates the processing for that round.

FIG. 7 is a flow chart showing the operation mode switching operation by the operation control unit 24 of FIG. The operation control unit 24 periodically executes the process of FIG. 7 .

First, in step S201, the operation control unit 24 confirms whether or not a report from the shaking amount estimation unit 25 has been received. If the notification has not been received, the operation control unit 24 maintains the normal operation mode in step S202 and terminates the processing for that round.

When receiving a report from the swing amount estimation unit 25, the operation control unit 24 determines in step S203 whether the car 15 is positioned within the rope resonance region. If the car 15 is not located within the rope resonance region, the operation control unit 24 maintains the normal operation mode in step S202 and terminates the processing for that round.

When the car 15 is located within the rope resonance region, the operation control unit 24 switches the operation mode to the control operation mode in step S204, and ends the processing for that round.

In such an elevator system, the sway amount estimator 25 obtains an estimated value of the sway magnitude of the determination object when the car 15 is positioned at a specific position based on the acceleration generated in the building 50, It is determined whether the estimated value is greater than or equal to the first shake amount threshold. Further, when the swing amount estimator 25 determines that the estimated value is equal to or greater than the first swing amount threshold and the car 15 is positioned within the rope resonance region, the operation control unit 24 changes the operation mode to control operation. mode.

Therefore, it is possible to obtain an estimated value of the magnitude of the swing of the judgment object by a simple calculation without using the position of the car 15 in real time as a variable. Further, it is possible to determine whether or not to switch to the controlled operation mode only by determining whether the car 15 is positioned within the rope resonance region. Therefore, it is possible to simplify the determination of whether or not control operation is necessary.

Also, the specific position is the car position at which the shaking of the determination target due to the shaking of the building 50 is the largest. Therefore, it is possible to more accurately determine the necessity of controlled operation.

Embodiment 2.
Next, FIG. 8 is a schematic configuration diagram showing an elevator system according to Embodiment 2. As shown in FIG. In Embodiment 2, two or more elevator apparatuses 31 are provided in building 50 . In FIG. 8 two elevator installations 31 are provided in the building 50 . That is, the elevator system main body 30 of FIG. 8 has two elevator devices 31 . The configuration of each elevator device 31 is the same as that of the first embodiment.

The number of shake amount estimation units 25 is only one. Also, the number of acceleration sensors 53 is only one.

FIG. 9 is a block diagram showing the control system of the elevator system of FIG. The operation control unit 24 of each elevator device 31 is connected to the shaking amount estimation unit 25 . The function of each operation control unit 24 and the function of the shaking amount estimation unit 25 are the same as in the first embodiment.

When the swing amount estimator 25 determines that the estimated value is equal to or greater than the first swing amount threshold and the corresponding car 15 is positioned within the rope resonance region, the operation control unit 24 in each elevator device 31 The operation mode shall be the control operation mode. Whether switching to the controlled operation mode is necessary or not is determined for each operation control unit 24 .

For example, in the example of FIG. 4, the operation mode of the second car 15 from the right is switched to the control operation mode, and the operation modes of the other three cars 15 remain in the normal operation mode.

The configuration and operation of the elevator system are the same as in the first embodiment, except that two or more elevator devices 31 are provided in the building 50.

In such an elevator system, each operation control unit 24 determines that the estimated value is greater than or equal to the first threshold value for the amount of swaying by the swaying amount estimating unit 25, and the corresponding car 15 is positioned within the rope resonance region. the operation mode shall be the control operation mode. Therefore, even when two or more elevator apparatuses 31 are installed in the building 50, it is possible to simplify the determination of necessity of controlled operation without increasing the calculation model.

Embodiment 3.
Next, an elevator system according to Embodiment 3 will be described. In the shake amount estimator 25 of Embodiment 3, a second shake amount threshold larger than the first shake amount threshold is set as a criterion for determining the magnitude of shake of the determination target. The shake amount estimator 25 determines whether or not the estimated value is greater than or equal to the second shake amount threshold.

When the sway amount estimator 25 determines that the estimated value is equal to or greater than the second sway amount threshold, the operation control unit 24 sets the operation mode to the controlled operation mode regardless of the position of the car 15 .

FIG. 10 is a flow chart showing the building shaking monitoring operation by the shaking amount estimation unit 25 of the third embodiment. The processing up to step S102 is the same as in the first embodiment.

After calculating the estimated value, the shake amount estimation unit 25 determines in step S105 whether the calculated estimated value is greater than or equal to the second shake amount threshold. If the estimated value is equal to or greater than the second threshold value for shaking amount, the amount estimating unit 25 notifies the operation control unit 24 of the determination result that the estimated value is equal to or larger than the second threshold value for shaking amount in step S104. exit.

If the estimated value is less than the second shake amount threshold, the shake amount estimator 25 determines in step S103 whether the calculated estimated value is greater than or equal to the first shake amount threshold. If the estimated value is less than the first shake amount threshold, the shake amount estimator 25 terminates the processing for that round.

If the estimated value is equal to or greater than the first threshold value for the amount of shaking, the amount estimating unit 25 notifies the operation control unit 24 of the determination result that the estimated value is equal to or greater than the first threshold value for the amount of shaking in step S104. exit.

FIG. 11 is a flow chart showing operation mode switching operation by the operation control unit 24 of the third embodiment. The processing of step S201 is the same as that of the first embodiment.

When receiving a report from the shaking amount estimation unit 25, the operation control unit 24 determines in step S205 whether the estimated value is equal to or greater than the second shaking amount threshold. If the estimated value is greater than or equal to the second swing amount threshold, the swing amount estimator 25 switches the operation mode to the control operation mode in step S204, and terminates the current process.

If the estimated value is less than the second swing amount threshold, the swing amount estimator 25 determines in step S203 whether the car 15 is positioned within the rope resonance region. If the car 15 is not located within the rope resonance region, the operation control unit 24 maintains the normal operation mode in step S202 and terminates the processing for that round.

The configuration and operation of the elevator system are the same as those of the first embodiment, except for the operations shown in FIGS.

In such an elevator system, the second shaking amount threshold is set in the shaking amount estimating section 25 . Then, when it is determined that the estimated value is equal to or greater than the second shaking amount threshold, the operation control unit 24 sets the operation mode to the control operation mode regardless of the position of the car 15 .

For this reason, when the building 50 shakes significantly, it is possible to prevent the object to be determined from coming into contact with or getting caught in equipment in the hoistway 51 .

Note that the second shake amount threshold may be set in the shake amount estimation unit 25 of the second embodiment. In this case, when the estimated value becomes equal to or greater than the second shaking amount threshold, the operation mode is switched to the controlled operation mode in all the elevator apparatuses 31 .

Also, the shake amount estimation unit 25 may be set with a third shake amount threshold that is larger than the second shake amount threshold. In this case, different control operations may be performed depending on whether the estimated value is less than the third shaking amount threshold or when the estimated value is equal to or greater than the third shaking amount threshold.

Note that in Embodiments 1 to 3, the installation location of the acceleration sensor 53 is not limited to the machine room 52, and may be the hoistway 51, for example.

Further, in Embodiments 1 to 3, the installation location of the swing amount estimation unit 25 is not limited to the machine room 52, and may be the hoistway 51, for example.

Also, the determination target is not limited to the main rope 14, and may be one of the plurality of compensating ropes 17 or the governor rope 22. Further, when a plurality of belts are used instead of the plurality of main ropes 14, one of the plurality of belts may be used as the determination target. That is, the object to be determined is a rope or a belt.

Also, the specific position is not necessarily limited to the position of the car where the shaking of the determination target due to the shaking of the building 50 is the largest. When changing the specific position, the first shake amount threshold may be changed accordingly.

Also, in Embodiments 1 to 3, the layout of the elevator apparatus 31 is not limited to the layout of FIG. For example, the roping scheme may be a 2:1 roping scheme.

Also, the elevator device 31 may be a machine room-less elevator, a double-deck elevator, or a one-shaft multi-car elevator. The one-shaft multi-car system is a system in which an upper car and a lower car placed directly below the upper car independently ascend and descend a common hoistway.

Also, each function of the operation control unit 24 and the shaking amount estimation unit 25 of Embodiments 1 to 3 is implemented by a processing circuit. FIG. 12 is a configuration diagram showing a first example of a processing circuit that realizes each function of the operation control section 24 and the shaking amount estimation section 25 of Embodiments 1 to 3. As shown in FIG. The processing circuit 100 of the first example is dedicated hardware.

Further, the processing circuit 100 is, for example, 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. Applicable. Also, each function of the operation control unit 24 and the shake amount estimation unit 25 may be implemented by individual processing circuits 100 , or each function may be collectively implemented by the processing circuit 100 .

FIG. 13 is a configuration diagram showing a second example of a processing circuit that implements the functions of the operation control section 24 and the shaking amount estimation section 25 of Embodiments 1-3. The processing circuit 200 of the second example comprises a processor 201 and a memory 202 .

In the processing circuit 200, each function of the operation control unit 24 and the shaking amount estimation unit 25 is realized by software, firmware, or a combination of software and firmware. Software and firmware are written as programs and stored in memory 202 . The processor 201 implements each function by reading and executing a program stored in the memory 202 .

It can also be said that the program stored in the memory 202 causes the computer to execute the procedure or method of each unit described above. Here, the memory 202 is, for example, RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable and volatile or volatile semiconductor memory. The memory 202 also includes magnetic disks, flexible disks, optical disks, compact disks, mini disks, DVDs, and the like.

It should be noted that the functions of each unit described above may be partly realized by dedicated hardware and partly by software or firmware.

In this way, the processing circuit can implement the functions of each unit described above by means of hardware, software, firmware, or a combination thereof.

14 main rope (determined object), 15 car, 24 operation control unit, 25 swing amount estimation unit, 30 elevator system main body, 31 elevator device, 50 building.

Claims

An elevator system body having an elevator device installed in a building, and a shaking amount estimator,
The elevator device includes:
basket,
a determination target that is a long object that is connected to the car and has flexibility;
an operation control unit that controls the operation of the car in a plurality of operation modes including a normal operation mode and a control operation mode,
A first shake amount threshold, which is a criterion for determining the magnitude of shake of the object to be determined, is set in the shake amount estimator,
A resonance region is set in the operation control unit, which is a region including a car position where the object to be determined resonates due to shaking of the building,
The sway amount estimating unit obtains an estimated value of the swaying magnitude of the determination object when the car is positioned at a specific position based on the acceleration generated in the building, and the estimated value is the first value. 1 Determine whether or not it is greater than or equal to the swing amount threshold,
The operation control unit changes the operation mode to the Elevator system in controlled operation mode.
　The elevator system according to claim 1, wherein the specific position is a car position at which the shaking of the determination target due to the shaking of the building is the largest.
The elevator system main body has two or more elevator devices,
The operation control unit in each elevator apparatus determines that the estimated value is equal to or greater than the first threshold value for the amount of shaking by the amount-of-sway estimating unit, and the corresponding car is located within the resonance area. 3. The elevator system according to claim 1 or 2, wherein the operation mode is set to the controlled operation mode at times.
A second shaking amount threshold larger than the first shaking amount threshold is set in the shaking amount estimating unit as a criterion for determining the magnitude of shaking of the determination object,
The shake amount estimator determines whether the estimated value is equal to or greater than the second shake amount threshold,
The operation control unit sets the operation mode to the control operation mode regardless of the position of the car when it is determined by the sway amount estimating unit that the estimated value is equal to or greater than the second sway amount threshold. Elevator system according to any one of claims 1 to 3.