elevator system

Abstract

To provide an elevator system capable of grasping the position of a car and performing necessary operation without the car passing through a seismically isolated intermediate floor during an earthquake. [Solution] The system includes a car that moves up and down in an elevator shaft that runs between the first floor, which is above the intermediate floor where the seismic isolation device is located, and the second floor, which is below, a position detection device that continuously detects the car's position, a control device that controls the car based on the car's position, an abnormality detection unit that detects when the position detection device is unable to detect the car's position, a position correction device that is installed in the elevator shaft and corrects the detected car position, and a position correction detection unit that is installed in the car and detects the position correction device. The position correction devices include a first position correction device that is detected when the car is located on the second floor, and a second position correction device that is detected when the car is located on the floor one floor above the intermediate floor. If the car's position cannot be detected during an earthquake, the control device lowers the car until the position correction detection unit detects the first or second position correction device.

Description

[Technical Field]

[0001] The present disclosure relates to elevator systems. [Background technology]

[0002] It is known that a control means for controlling the controlled operation of an elevator controls the operation so that, during controlled operation when sway is detected by a sway detection means and the car is stopped at the nearest floor, the control means controls the operation so that the car avoids stopping at the seismic isolation structure, i.e., passes through or stops short of the seismic isolation structure, based on car position, speed, and direction information from a car position, speed, and direction detection means, seismic isolation structure position information from a seismic isolation structure position storage means, and car braking distance information in the event of an emergency stop from an emergency stop distance storage means (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-026076 Summary of the Invention [Problem to be solved by the invention]

[0004] Thus, the elevator disclosed in Patent Document 1 controls the operation of the car in the event of an earthquake so that it passes through an intermediate floor where a seismic isolation structure, i.e., a seismic isolation device, is installed, or stops just before that floor. Meanwhile, one technology for detecting the position of an elevator car is to continuously detect the car position using, for example, a linear scale installed in the elevator shaft. With the technology disclosed in Patent Document 1, if the effects of an earthquake make it impossible to detect the car position using a linear scale or the like, the relative positions of the car and the intermediate floor where the seismic isolation device is installed cannot be determined, and necessary operations, such as controlled operation, cannot be performed appropriately.

[0005] The present disclosure has been made to solve such problems, and its purpose is to provide an elevator system that continuously detects the position of a car to control its operation, and that can grasp the car's position in the event of an earthquake and perform necessary subsequent operation without the car passing through an intermediate floor where a seismic isolation device is installed. [Means for solving the problem]

[0006] The elevator system according to the present disclosure is an elevator system installed in a building in which a seismic isolation device is provided on an intermediate floor between the top floor and the bottom floor, and includes: a car that moves up and down in a hoistway provided between a first floor above the intermediate floor and a second floor below the intermediate floor; a position detection device that continuously detects the position of the car; a control device that controls the running of the car based on the position of the car detected by the position detection device; an earthquake sensor that detects earthquake motion in the building; an abnormality detection unit that detects when the position detection device cannot normally detect the position of the car; and an abnormality detection unit that is provided in the hoistway and detects when the position of the car cannot be detected by the position detection device. The system is equipped with a position correction device for correcting the position, and a position correction detection unit provided in the car and detecting the position correction device, wherein the position correction device comprises a first position correction device installed at a position that is detected by the position correction detection unit when the car is located on the second floor, and a second position correction device installed at a position that is detected by the position correction detection unit when the car is located on the third floor, which is one floor above the intermediate floor, and when the earthquake sensor detects seismic motion and the abnormality detection unit detects that the car position cannot be detected, the control device lowers the car until the position correction detection unit detects either the first position correction device or the second position correction device, and then performs a rescue operation to open the door.

[0007] Alternatively, the elevator system according to the present disclosure is an elevator system installed in a building in which a seismic isolation device is provided on an intermediate floor between the top floor and the bottom floor, and includes a car that moves up and down in a hoistway provided between a first floor that is above the intermediate floor and a second floor that is below the intermediate floor, a position detection device that continuously detects the position of the car, a control device that controls the running of the car based on the position of the car detected by the position detection device, an earthquake sensor that senses earthquake motion in the building, an abnormality detection unit that detects when the position detection device cannot normally detect the position of the car, and a fault detection unit that is provided in the hoistway and detects when the position detection device cannot detect the position of the car. and a position correction device for detecting the position correction device, and a position correction detection unit provided in the car and detecting the position correction device, wherein the position correction device comprises a first position correction device installed at a position detected by the position correction detection unit when the car is located on the second floor, and a second position correction device installed at a position detected by the position correction detection unit when the car is located on the third floor which is one floor above the intermediate floor, or between the third floor and the intermediate floor, and when the earthquake sensor detects seismic motion and the abnormality detection unit detects that the car position cannot be detected, the control device performs a car position detection recovery operation to lower the car until the position correction detection unit detects either the first position correction device or the second position correction device.

[0008] Alternatively, the elevator system according to the present disclosure is an elevator system installed in a building in which a seismic isolation device is provided on an intermediate floor between the top floor and the bottom floor, and includes a car that moves up and down in a hoistway provided between a first floor that is above the intermediate floor and a second floor that is below the intermediate floor, a position detection device that continuously detects the position of the car, a control device that controls the running of the car based on the position of the car detected by the position detection device, an earthquake sensor that senses earthquake motion in the building, an abnormality detection unit that detects when the position detection device cannot normally detect the position of the car, and a fault detection unit that is provided in the hoistway and detects when the position detection device cannot detect the position of the car. and a position correction device for correcting the position of the elevator car, and a position correction detection unit provided in the elevator car and detecting the position correction device, wherein the position correction device comprises a first position correction device installed at a position detected by the position correction detection unit when the elevator car is located on the first floor, and a second position correction device installed at a position detected by the position correction detection unit when the elevator car is located on the third floor which is one floor below the intermediate floor, or between the third floor and the intermediate floor, and when the earthquake sensor detects seismic motion and the abnormality detection unit detects that the elevator car position cannot be detected, the control device performs an elevator car position detection recovery operation in which the elevator car is raised until the position correction detection unit detects either the first position correction device or the second position correction device. [Effects of the Invention]

[0009] According to the elevator system of the present disclosure, in an elevator that continuously detects the position of the car and controls operation, in the event of an earthquake, the position of the car can be determined without the car passing through an intermediate floor where a seismic isolation device is installed, and the necessary subsequent operation can be carried out. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram schematically illustrating the overall configuration of an elevator system according to a first embodiment. [Figure 2]1 is a block diagram showing the configuration of a control system of an elevator system according to a first embodiment. [Figure 3] 4 is a flowchart showing an example of the operation of the elevator system according to the first embodiment. [Figure 4] 1 is a diagram showing an example of a configuration for realizing the functions of a control device of an elevator system according to a first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Embodiments of an elevator system according to the present disclosure will be described with reference to the accompanying drawings. In each drawing, identical or corresponding parts are designated by the same reference numerals, and redundant descriptions will be appropriately simplified or omitted. For convenience, the following description may express the positional relationship of each structure based on the illustrated state. Note that the present disclosure is not limited to the following embodiments, and any combination of the embodiments, any modification of any component of each embodiment, or any omission of any component of each embodiment are possible within the scope of the present disclosure.

[0012] Embodiment 1 A first embodiment of the present disclosure will be described with reference to Fig. 1 to Fig. 4. Fig. 1 is a diagram schematically illustrating the overall configuration of an elevator system. Fig. 2 is a block diagram illustrating the configuration of a control system of the elevator system. Fig. 3 is a flow diagram illustrating an example of the operation of the elevator system. Fig. 4 is a diagram illustrating an example of the configuration for realizing the functions of a control device of the elevator system.

[0013] The building in which the elevator system according to this embodiment is installed has an intermediate floor seismic isolation structure. That is, a seismic isolation device is provided on an intermediate floor 43 between the top floor 42 and the bottom floor 41 of the building shown in Fig. 1. In this disclosure, the floor on which the seismic isolation device is provided is simply referred to as the intermediate floor 43.

[0014] The building's framework is divided into an upper floor and a lower floor at the intermediate floor 43. The seismic isolation device is placed between the building framework on the upper floor and the building framework on the lower floor. The seismic isolation device has an isolator and a damper. The isolator is, for example, laminated rubber. The laminated rubber has a structure in which multiple rubber layers and steel plate layers are alternately stacked. The damper is, for example, an oil damper or a steel damper. By installing the seismic isolation device on the intermediate floor 43, it is possible to prevent the entire building from shaking too much during an earthquake.

[0015] As shown in FIG. 1, a building in which an elevator is installed has a hoistway 10 formed therein. The hoistway 10 is provided between the first floor and the second floor. The first floor is a floor above the intermediate floor 43. The second floor is a floor below the intermediate floor 43. In the illustrated configuration example, the first floor is the top floor 42 and the second floor is the bottom floor 41.

[0016] The elevator is equipped with a car 20 and a counterweight (not shown). The car 20 and the counterweight are guided by guide rails (not shown) and move up and down in the hoistway 10. The car 20 is a box-shaped structure for transporting passengers, cargo, etc. The counterweight is a weight for balancing the weight of the car 20.

[0017] A machine room is provided at the top of the elevator shaft 10. A hoisting machine 30 and a control device 100 are installed in the machine room. The hoisting machine 30 is a power source for raising and lowering the elevator car 20. One end of a main rope is connected to the upper end of the elevator car 20. The other end of the main rope is connected to the upper end of the counterweight. The middle portion of the main rope is wound around the sheave and deflector pulley of the hoisting machine 30. In this manner, the elevator car 20 and the counterweight are suspended by the main rope in a bucket-like manner, rising and falling in opposite directions within the elevator shaft 10. In the exemplary configuration shown in FIG. 1 , the main rope suspends the elevator car 20 and the counterweight within the elevator shaft 10 using a 1:1 roping system. However, the roping system is not limited to this, and other roping systems, such as a 2:1 roping system, may also be used.

[0018] The elevator system according to this embodiment further includes a position detection device 50. The position detection device 50 continuously detects the position of the car 20. In the configuration example described here, the position detection device 50 includes a linear scale 51 and a reading unit 52. The linear scale 51 is provided along the movement path of the car 20. The linear scale 51 has position information within the hoistway 10. The reading unit 52 is provided in the car 20. The reading unit 52 reads the position information from the linear scale 51. The position information read by the reading unit 52 is transmitted to on-car equipment (not shown) installed above the car 20. The on-car equipment transmits the position information of the linear scale 51 read by the reading unit 52 to the control device 100 via a control cable (not shown).

[0019] The position detection device 50 is not limited to one equipped with the linear scale 51 and the reading unit 52, as long as it continuously detects the position of the car 20. Alternatively, for example, the position detection device 50 may be one that continuously detects the position of the car 20 by detecting the amount of rotation of a governor (not shown) that is linked to the movement of the car 20 using an encoder or the like.

[0020] The elevator system according to this embodiment further includes a position correction device 60. The position correction device 60 corrects the position of the car 20. The position correction device 60 is disposed at a predetermined position within the elevator shaft 10. The car 20 is provided with a position correction detection unit 70. The position correction detection unit 70 is a sensor that detects the position correction device 60. Since the position at which the position correction device 60 is installed is known, the position of the car 20 when the position correction detection unit 70 detects the position correction device 60 can be identified. In this way, the position of the car 20 when the position correction detection unit 70 detects the position correction device 60 can be identified, and the position of the car 20 detected by the position detection device 50 can be corrected based on the identified position. This position correction makes it possible to address degradation in position detection accuracy due to aging, including wear, of the position detection device 50.

[0021] The position correction device 60 may be, for example, a landing plate that defines the landing position of the car 20. By using the landing plate as the position correction device 60, there is no need to provide a device dedicated to correcting the position detection device 50, and the configuration can be simplified. In this case, the installation position of the position correction device 60, which is the landing plate, corresponds to the floor at which the car 20 stops.

[0022] In the elevator system according to this embodiment, the overall operation, including the operation of the car 20, is controlled by a control device 100. FIG. 2 shows the configuration of a control system of the elevator system according to this embodiment. As shown in the figure, the control device 100 has, as its functional configuration, a car control unit 110 and an abnormality detection unit 120. The car control unit 110 controls the operation of the car 20 mainly by controlling the operation of the hoisting machine 30, a braking device (not shown), etc. In this case, the car control unit 110 determines the exact position of the car 20 based on the position of the car 20 detected by the position detection device 50 and the detection result of the position correction device 60 by the position correction detection unit 70, and controls the running and stopping of the car 20.

[0023] The abnormality detection unit 120 detects that the car position cannot be detected. The car position cannot be detected when the position detection device 50 cannot normally detect the position of the car 20. Specifically, for example, the abnormality detection unit 120 detects that the car position cannot be detected when the reading unit 52 cannot read the position information from the linear scale 51. For example, when the reading unit 52 cannot read the position information from the linear scale 51, it transmits a read error signal to the control device 100. When the abnormality detection unit 120 receives a read error signal from the reading unit 52, it detects that the car position cannot be detected.

[0024] Alternatively, the abnormality detection unit 120 may detect the inability to detect the car position based on the consistency between the position information read by the reading unit 52 and the detection value of the encoder provided in the hoist 30. The detection value of the encoder of the hoist 30 indicates the amount of rotation of the sheave of the hoist 30, and is correlated with the relative movement distance of the car 20. Therefore, for example, if there is a discrepancy of a certain amount or more between the movement distance of the car 20 calculated from the detection value of the encoder of the hoist 30 and the movement distance of the car 20 calculated from the position information read by the reading unit 52, the abnormality detection unit 120 determines that there is an inconsistency between the position information read by the reading unit 52 and the detection value of the encoder of the hoist 30. Then, if the abnormality detection unit 120 determines that there is an inconsistency between them, it detects that the position detection device 50 is unable to detect the car position.

[0025] Furthermore, for another example, the abnormality detection unit 120 may detect that the car position cannot be detected when there is an abnormality in communication between the reading unit 52 and the control device 100. As described above, the position information read by the reading unit 52 of the car 20 is transmitted to the control device 100 via the on-car equipment and the control cable. The abnormality detection unit 120 monitors the communication status between the reading unit 52 and the control device 100. Then, when communication therebetween is interrupted or when an error such as corruption is found in the signal transmitted from the reading unit 52, the abnormality detection unit 120 detects that the car position cannot be detected due to an abnormality in communication between the reading unit 52 and the control device 100.

[0026] 2, the elevator system according to this embodiment further includes an earthquake sensor 80. The earthquake sensor 80 detects earthquake motion in the building in which the elevator system is installed. The detection result by the earthquake sensor 80 is input to the control device 100.

[0027] In the elevator system according to this embodiment, as shown in FIGS. 1 and 2, at least two position correction devices 60 are installed: a first position correction device 61 and a second position correction device 62. The first position correction device 61 is installed at a position detected by the position correction detection unit 70 when the position of the car 20 is the second floor described above. In the present disclosure, the position of the position correction device 60 detected by the position correction detection unit 70 when the position of the car 20 is "floor A" is referred to as the "position corresponding to floor A." The second position correction device 62 is installed at a position detected by the position correction detection unit 70 when the position of the car 20 is the third floor. The third floor is the floor 44 one floor above the intermediate floor. In other words, the second position correction device 62 in this case is installed at a position corresponding to the floor 44 one floor above the intermediate floor (the third floor).

[0028] In the elevator system according to this embodiment, the car control unit 110 of the control device 100 performs rescue operation when the earthquake sensor 80 detects earthquake motion and the abnormality detection unit 120 detects that the car position cannot be detected. The rescue operation is an operation in which the car 20 is lowered until the position correction detection unit 70 detects either the first position correction device 61 or the second position correction device 62, and then the car 20 door is opened.

[0029] When the earthquake sensor 80 detects earthquake motion of a certain magnitude or greater, the elevator operation is brought to an emergency stop. At this time, if the position detection device 50 is unable to detect the car position, the elevator cannot operate using the car position detection results of the position detection device 50, and any passengers inside the car 20 will be trapped inside the car 20 that has been brought to an emergency stop.

[0030] According to the elevator system configured as described above, when an earthquake occurs and the position detection device 50 is unable to detect the car position, the car 20 is lowered, targeting either the first position correction device 61 or the second position correction device 62, until the position correction detection unit 70 detects either one of them. This allows the car 20 to run to the floor on which the position correction device 60 is installed, without relying on car position detection by the position detection device 50. Then, by the position correction detection unit 70 detecting the position correction device 60, the position of the car 20 at that time can be identified, and the car 20 can be landed on the floor on which the position correction device 60 is installed, and the doors of the car 20 can be opened at that floor to release the passengers inside the car 20.

[0031] In this case, since the intermediate floor 43 has a seismic isolation layer, it is possible that the elevator shaft 10 may shift at the intermediate floor 43 due to the influence of seismic motion, causing a disruption to the travel of the car 20 passing through the intermediate floor 43. In the elevator system according to this embodiment, as described above, the first position correction device 61 is installed at a position corresponding to the second floor (the lowest floor 41 in the configuration example described here) that is lower than the intermediate floor 43, and the second position correction device 62 is installed at a position corresponding to the third floor, which is the floor 44 one floor above the intermediate floor. Therefore, when the car 20 is located below the intermediate floor 43, the car 20 descends to the second floor (the lowest floor 41) where the first position correction device 61 is installed in the rescue operation described above, and the door opens at this second floor. Furthermore, if the car 20 is located above the intermediate floor 43, the car 20 descends to the third floor (floor 44, one floor above the intermediate floor) where the second position correction device 62 is installed in the rescue operation described above, and the doors open on this third floor. Therefore, in the event of an earthquake, the position of the car 20 can be grasped without the car 20 passing through the intermediate floor 43 where the seismic isolation device is installed, and a rescue operation can be performed in which the car 20 is stopped at the floor and the doors are opened.

[0032] Next, an example of the operation of the elevator system according to this embodiment will be described with reference to the flow chart of Figure 3. First, in step S10, when the earthquake sensor 80 detects earthquake motion, in step S11, the abnormality detection unit 120 determines whether the car position cannot be detected as described above, that is, whether the position detection device 50 cannot normally detect the position of the car 20. If the car position cannot be detected, the control device 100 then performs processing in step S12. In step S12, the car control unit 110 of the control device 100 performs a normal rescue operation using the car position detected by the position detection device 50. A normal rescue operation is an operation in which the car 20 travels to the nearest rescue floor and opens the doors. Note that in this case, the rescue floor is selected so as not to pass over the intermediate floor 43, which has a seismic isolation layer.

[0033] On the other hand, if the car position cannot be detected in step S11, the control device 100 then performs the process of step S13. In step S13, the car control unit 110 lowers the car 20. In the following step S14, the car control unit 110 determines whether the position correction detection unit 70 has detected the first position correction device 61 or the second position correction device 62. If the position correction device 60 is not detected, the car control unit 110 returns to step S13 and continues the process, thereby continuing to lower the car 20. If the position correction detection unit 70 detects the first position correction device 61 or the second position correction device 62, the control device 100 then performs the process of step S15. In step S15, the car control unit 110 stops the car 20 and opens the door. As a result, if the position correction device 60 detected in step S14 is the first position correction device 61, the car 20 stops at the lowest floor 41 and opens the door. If the position correction device 60 detected in step S14 is the second position correction device 62, the elevator car 20 is stopped at the floor 44 one floor above the intermediate floor and the door is opened.

[0034] Next, a modified example of the elevator system according to this embodiment will be described. In the configuration example described above, if the position detection device 50 is unable to detect the car position when an earthquake occurs, the car 20 is lowered until the first position correction device 61 or the second position correction device 62 is detected, and then a rescue operation is performed in which the car 20 door is opened. In contrast, in this modified example, if the car position detection is unable to be detected when an earthquake occurs, a car position detection recovery operation is performed instead of a rescue operation.

[0035] The car position detection recovery operation is an operation in which the car 20 is lowered until the position correction detection unit 70 detects either the first position correction device 61 or the second position correction device 62. In other words, the car position detection recovery operation only lowers the car 20 until the first position correction device 61 or the second position correction device 62 is detected, and does not open the door of the last car 20, which was performed in the rescue operation. By performing this car position detection recovery operation to lower the car until the position correction detection unit 70 detects the first position correction device 61 or the second position correction device 62, recalibration is performed on the reference position for car position detection, and if the inability to detect the car position is temporary due to the effects of an earthquake, car position detection by the position detection device 50 can be restored.

[0036] In this modification, the car control unit 110 of the control device 100 may perform a rescue operation after the car position detection recovery operation. In this case, the rescue operation is an operation in which the car 20 is stopped at a floor where it can be stopped and then the doors are opened. In this case, the floor where the car 20 is stopped and the doors are opened may be the second floor (the lowest floor 41) or the third floor (the floor 44 one floor above the intermediate floor), or it may be any floor. For example, if the lowest floor 41 is a basement or the like and does not have an entrance or exit to the building, it may be preferable to use a floor with an entrance or exit to the building rather than the lowest floor 41 as a floor for releasing passengers, taking into consideration subsequent evacuation, etc. According to this modification, in the event of an earthquake, the car 20 does not pass through the intermediate floor 43 where a seismic isolation device is installed, and the necessary operations such as rescue operation can then be performed.

[0037] In this modified example in which the car position detection recovery operation and the rescue operation are performed separately, the installation position of the second position correction device 62 does not have to be a position corresponding to the third floor (the floor 44 one floor above the intermediate floor), but may be a position detected by the position correction detection unit 70 when the position of the car 20 is between the third floor and the intermediate floor 43. However, in this case, it is assumed that the second position correction device 62 is not a landing plate.

[0038] In the configuration examples described above, the car 20 is lowered during rescue operation or car position detection recovery operation. However, the car 20 may be raised instead of lowered during these operations. In this case, the first position correction device 61 is installed at a position where it is detected by the position correction detection unit 70 when the car 20 is located on the first floor (the top floor 42 in the example described here). The second position correction device 62 is installed at a position where it is detected by the position correction detection unit 70 when the car 20 is located on the third floor, which is the floor one floor below the intermediate floor. In other words, the third floor on which the second position correction device 62 is installed is the floor one floor below the intermediate floor on which the car 20 is located.

[0039] Then, when the earthquake sensor 80 detects seismic motion and the abnormality detection unit 120 detects that the car position cannot be detected, the car control unit 110 of the control device 100 performs a car position detection recovery operation to raise the car 20 until the position correction detection unit 70 detects either the first position correction device 61 or the second position correction device 62. As before, the installation position of the second position correction device 62 does not have to be a position corresponding to the third floor (the floor one floor below the intermediate floor), but may be a position detected by the position correction detection unit 70 when the car 20 is located between the third floor and the intermediate floor 43.

[0040] FIG. 4 is a diagram showing an example of a configuration for realizing the functions of the control device 100 in this embodiment. The functions of the control device 100 are realized by, for example, a processing circuit. The processing circuit may include a processor 101 and a memory 102. The processing circuit may be dedicated hardware 103. A part of the processing circuit may be formed as dedicated hardware 103, and the processing circuit may further include a processor 101 and a memory 102. In the example shown in the figure, a part of the processing circuit is formed as dedicated hardware 103. Furthermore, in the example shown in the figure, the processing circuit further includes a processor 101 and a memory 102.

[0041] The processing circuitry, part of which is at least one dedicated hardware 103, may be, for example, a single circuit, a multiple circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. If the processing circuitry comprises at least one processor 101 and at least one memory 102, the functionality of the control device 100 may be realized by software, firmware, or a combination of software and firmware.

[0042] The software and firmware are written as programs and stored in memory 102. Processor 101 realizes the functions of each unit by reading and executing the programs stored in memory 102. Processor 101 is also called a CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. Memory 102 may include, for example, non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, and EEPROM, or a magnetic disk, flexible disk, optical disk, compact disk, minidisk, DVD, etc.

[0043] In this way, the processing circuit of the control device 100 can realize each function of the control device 100 by hardware, software, firmware, or a combination of these. When the processing circuit of the control device 100 includes at least the processor 101 and the memory 102, the processor 101 executes a program stored in the memory 102 in the control device 100, and the hardware and software of the control device 100 work together to realize the functions of each unit of the control device 100. Note that the elevator system is not limited to a configuration in which operation is controlled by a single control device 100. The operation of the elevator system may be controlled by cooperation between multiple devices.

[0044] In the present disclosure, the embodiments, configuration examples, modifications, etc. may be combined in any manner without departing from the spirit of the present disclosure. Examples of various aspects of the present disclosure are summarized below as appendices. (Appendix 1) An elevator system installed in a building in which a seismic isolation device is provided on an intermediate floor between the top floor and the bottom floor, a car that ascends and descends in a hoistway provided between a first floor that is higher than the intermediate floor and a second floor that is lower than the intermediate floor; a position detection device that continuously detects the position of the elevator car; a control device that controls the running of the elevator car based on the position of the elevator car detected by the position detection device; an earthquake detector that detects earthquake motion in the building; An abnormality detection unit that detects an inability to detect a car position in a state in which the position detection device cannot normally detect the position of the car; a position correction device provided in the elevator shaft for correcting the position of the elevator car detected by the position detection device; a position correction detection unit provided in the elevator car and detecting the position correction device; The position correction device includes: A first position correction device installed at a position detected by the position correction detection unit when the position of the elevator car is on the second floor; a second position correction device installed at a position that is detected by the position correction detection unit when the elevator car is located on a third floor that is one floor above the intermediate floor; The control device is an elevator system that, when the earthquake sensor detects seismic motion and the abnormality detection unit detects that the car position cannot be detected, performs a rescue operation by lowering the car until the position correction detection unit detects either the first position correction device or the second position correction device, and then opens the doors. (Appendix 2) An elevator system installed in a building in which a seismic isolation device is provided on an intermediate floor between the top floor and the bottom floor, a car that ascends and descends in a hoistway provided between a first floor that is higher than the intermediate floor and a second floor that is lower than the intermediate floor; a position detection device that continuously detects the position of the elevator car; a control device that controls the running of the elevator car based on the position of the elevator car detected by the position detection device; an earthquake detector that detects earthquake motion in the building; An abnormality detection unit that detects an inability to detect a car position in a state in which the position detection device cannot normally detect the position of the car; a position correction device provided in the elevator shaft for correcting the position of the elevator car detected by the position detection device; a position correction detection unit provided in the elevator car and detecting the position correction device; The position correction device includes: A first position correction device installed at a position detected by the position correction detection unit when the position of the elevator car is on the second floor; a second position correction device installed at a position that is detected by the position correction detection unit when the elevator car is located on the third floor, which is one floor above the intermediate floor, or between the third floor and the intermediate floor; The control device is an elevator system that, when the earthquake sensor detects seismic motion and the abnormality detection unit detects that the car position cannot be detected, performs a car position detection recovery operation to lower the car until the position correction detection unit detects either the first position correction device or the second position correction device. (Appendix 3) An elevator system installed in a building in which a seismic isolation device is provided on an intermediate floor between the top floor and the bottom floor, a car that ascends and descends in a hoistway provided between a first floor that is higher than the intermediate floor and a second floor that is lower than the intermediate floor; a position detection device that continuously detects the position of the elevator car; a control device that controls the running of the elevator car based on the position of the elevator car detected by the position detection device; an earthquake detector that detects earthquake motion in the building; An abnormality detection unit that detects an inability to detect a car position in a state in which the position detection device cannot normally detect the position of the car; a position correction device provided in the elevator shaft for correcting the position of the elevator car detected by the position detection device; a position correction detection unit provided in the elevator car and detecting the position correction device; The position correction device includes: A first position correction device installed at a position detected by the position correction detection unit when the position of the elevator car is at the first floor; a second position correction device installed at a position that is detected by the position correction detection unit when the elevator car is located on a third floor that is one floor below the intermediate floor, or between the third floor and the intermediate floor; The control device is an elevator system that, when the earthquake sensor detects seismic motion and the abnormality detection unit detects that the car position cannot be detected, performs a car position detection recovery operation to raise the car until the position correction detection unit detects either the first position correction device or the second position correction device. (Appendix 4) The elevator system according to claim 2 or 3, wherein the control device, after the car position detection recovery operation, performs a rescue operation in which the car is stopped at a floor where it can be stopped and then the door is opened. (Appendix 5) An elevator system according to any one of claims 1 to 4, wherein the position correction device is a landing plate that determines the landing position of the elevator car. (Appendix 6) The position detection device a linear scale provided along a moving path of the car and having position information within the elevator shaft; An elevator system according to any one of Supplementary Note 1 to Supplementary Note 5, further comprising: a reading unit provided in the elevator car that reads the position information from the linear scale. (Appendix 7) 7. The elevator system according to claim 6, wherein the abnormality detection unit detects that the car position cannot be detected when the reading unit is unable to read the position information from the linear scale. (Appendix 8) The elevator system described in Appendix 6, wherein the abnormality detection unit detects the inability to detect the car position based on the consistency between the position information read by the reading unit and the detection value of an encoder provided on a hoist that raises and lowers the car. (Appendix 9) 7. The elevator system according to claim 6, wherein the abnormality detection unit detects that the car position cannot be detected when a communication abnormality occurs between the reading unit and the control device. [Explanation of symbols]

[0045] 10 Elevator shaft 20 Car 30 Hoisting machine 41 Bottom Floor 42 Top Floor 43 Middle Floor 44 The floor above the middle floor 50 Position detection device 51 Linear Scale 52 Reading unit 60 Position correction equipment 61 1st position correction device 62 Second position correction device 70 Position correction detection unit 80 Earthquake detector 100 control device 101 processors 102 memory 103 Dedicated Hardware 110 Cage control unit 120 Abnormality detection unit

Claims

1. An elevator system installed in a building in which a seismic isolation device is provided on an intermediate floor between the top floor and the bottom floor, a car that ascends and descends in a hoistway provided between a first floor that is higher than the intermediate floor and a second floor that is lower than the intermediate floor; a position detection device that continuously detects the position of the elevator car; a control device that controls the running of the elevator car based on the position of the elevator car detected by the position detection device; an earthquake detector that detects earthquake motion in the building; An abnormality detection unit that detects an inability to detect a car position in a state in which the position detection device cannot normally detect the position of the car; a position correction device provided in the elevator shaft for correcting the position of the elevator car detected by the position detection device; a position correction detection unit provided in the elevator car and detecting the position correction device; The position correction device includes: a first position correction device installed at a position detected by the position correction detection unit when the position of the elevator car is at the second floor; a second position correction device installed at a position detected by the position correction detection unit when the elevator car is located on a third floor that is one floor above the intermediate floor; The control device is an elevator system in which, when the earthquake sensor detects seismic motion and the abnormality detection unit detects that the car position cannot be detected, the control device lowers the car until the position correction detection unit detects either the first position correction device or the second position correction device, and then performs a rescue operation to open the door.

2. An elevator system installed in a building in which a seismic isolation device is provided on an intermediate floor between the top floor and the bottom floor, a car that ascends and descends in a hoistway provided between a first floor that is higher than the intermediate floor and a second floor that is lower than the intermediate floor; a position detection device that continuously detects the position of the elevator car; a control device that controls the running of the elevator car based on the position of the elevator car detected by the position detection device; an earthquake detector that detects earthquake motion in the building; An abnormality detection unit that detects an inability to detect a car position in a state in which the position detection device cannot normally detect the position of the car; a position correction device provided in the elevator shaft for correcting the position of the elevator car detected by the position detection device; a position correction detection unit provided in the elevator car and detecting the position correction device; The position correction device includes: a first position correction device installed at a position detected by the position correction detection unit when the position of the elevator car is at the second floor; a second position correction device installed at a position that is detected by the position correction detection unit when the elevator car is located on a third floor that is one floor above the intermediate floor, or between the third floor and the intermediate floor; The control device is an elevator system that, when the earthquake sensor detects seismic motion and the abnormality detection unit detects that the car position cannot be detected, performs a car position detection recovery operation to lower the car until the position correction detection unit detects either the first position correction device or the second position correction device.

3. An elevator system installed in a building in which a seismic isolation device is provided on an intermediate floor between the top floor and the bottom floor, a car that ascends and descends in a hoistway provided between a first floor that is higher than the intermediate floor and a second floor that is lower than the intermediate floor; a position detection device that continuously detects the position of the elevator car; a control device that controls the running of the elevator car based on the position of the elevator car detected by the position detection device; an earthquake detector that detects earthquake motion in the building; An abnormality detection unit that detects an inability to detect a car position in a state in which the position detection device cannot normally detect the position of the car; a position correction device provided in the elevator shaft for correcting the position of the elevator car detected by the position detection device; a position correction detection unit provided in the elevator car and detecting the position correction device; The position correction device includes: a first position correction device installed at a position detected by the position correction detection unit when the position of the elevator car is at the first floor; a second position correction device installed at a position that is detected by the position correction detection unit when the elevator car is located on a third floor that is one floor below the intermediate floor, or between the third floor and the intermediate floor; The control device is an elevator system that, when the earthquake sensor detects seismic motion and the abnormality detection unit detects that the car position cannot be detected, performs a car position detection recovery operation to raise the car until the position correction detection unit detects either the first position correction device or the second position correction device.

4. 4. The elevator system according to claim 2, wherein the control device, after the car position detection recovery operation, performs a rescue operation in which the car is stopped at a floor where the car can be stopped and then the door is opened.

5. 4. The elevator system according to claim 1, wherein the position correction device is a landing plate that defines a landing position of the elevator car.

6. The position detection device a linear scale provided along a moving path of the car and having position information within the elevator shaft; 4. The elevator system according to claim 1, further comprising: a reading unit provided in the elevator car, the reading unit reading the position information from the linear scale.

7. 7. The elevator system according to claim 6, wherein the abnormality detection unit detects that the car position cannot be detected when the reading unit is unable to read the position information from the linear scale.

8. The elevator system according to claim 6, wherein the abnormality detection unit detects the inability to detect the car position based on consistency between the position information read by the reading unit and a detection value of an encoder provided on a hoist that raises and lowers the car.

9. The elevator system according to claim 6, wherein the abnormality detection unit detects that the car position cannot be detected when a communication abnormality occurs between the reading unit and the control device.

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