control device

Abstract

To provide a control device that can automatically diagnose an elevator after an earthquake and quickly resume car operation.SOLUTION: A control device is an elevator control device that automatically performs diagnostic operation on a car to return to normal operation after the car has stopped due to an earthquake, and includes: a situation detection unit that detects the situation of the car when S-waves caused by the earthquake are detected by an earthquake detector; a diagnosis unit that executes first control to perform diagnostic operation in short-time mode, which requires less time than long-time mode, after performing long-time mode diagnostic operation; and an operation control unit that controls normal operation of the car and starts normal operation of the car after S-waves caused by the earthquake are detected and short-time mode diagnostic operation has ended. The diagnosis unit executes second control to perform diagnostic operation in short-time mode without performing long-time mode diagnostic operation, rather than the first control, depending on the situation detected by the situation detection unit.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] This disclosure relates to an elevator control device.

Background Art

[0002] Patent Document 1 discloses an elevator system. According to this elevator system, after the occurrence of sway, if conditions are satisfied, a diagnostic operation is automatically performed. After the diagnostic operation, the elevator system can start operating.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] After an earthquake, when the risk of equipment damage is high, it is necessary to conduct a diagnosis of the elevator system over time. On the other hand, when the risk of equipment damage is low, there are cases where it is not necessary to spend time on diagnosis. However, in the elevator system described in Patent Document 1, the same diagnostic operation is performed uniformly. Therefore, in any case, it takes time until the elevator resumes operation.

[0005] This disclosure has been made to solve the above problems. The object of this disclosure is to provide a control device that can automatically perform elevator diagnosis after an earthquake and resume car operation earlier.

Means for Solving the Problems

[0006] The control device according to this disclosure is a control device for an elevator that automatically performs a diagnostic operation of the elevator car after the car has stopped due to an earthquake and returns to normal operation, comprising: a situation detection unit that detects the condition of the elevator car when S-waves caused by an earthquake are detected by an earthquake detector; a diagnostic unit that performs a first control which performs a short-time diagnostic operation which requires less time than the long-time diagnostic operation after performing a long-time diagnostic operation; and an operation control unit that controls the normal operation of the elevator car and starts the normal operation of the elevator car after S-waves caused by an earthquake have been detected and the short-time diagnostic operation has been completed, wherein the diagnostic unit performs a second control which performs a short-time diagnostic operation without performing a long-time diagnostic operation, instead of the first control, depending on the situation detected by the situation detection unit. [Effects of the Invention]

[0007] According to this disclosure, depending on the circumstances at the time of the earthquake, normal operation of the elevator car may begin after only a short-duration diagnostic operation has been performed. Therefore, it is possible to automatically diagnose the elevator after an earthquake and resume operation of the elevator car more quickly. [Brief explanation of the drawing]

[0008] [Figure 1] This is a diagram showing the configuration of a building to which the elevator system in Embodiment 1 is applied. [Figure 2] This is a functional block diagram of the elevator system in Embodiment 1. [Figure 3] This is a flowchart showing the operation of the control device in Embodiment 1. [Figure 4] This is a flowchart showing the operation of the control device in Embodiment 1. [Figure 5] This is a flowchart showing the operation of the control device in Embodiment 1. [Figure 6] This is a flowchart showing the operation of the control device in Embodiment 1. [Figure 7] This is a hardware configuration diagram of the control device in Embodiment 1. [Modes for carrying out the invention]

[0009] The embodiments for implementing this disclosure will be described with reference to the attached drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals. The explanation of such parts will be simplified or omitted as appropriate.

[0010] Embodiment 1. Figure 1 is a diagram showing the configuration of a building to which the elevator system in Embodiment 1 is applied. Figure 2 is a functional block diagram of the elevator system in Embodiment 1.

[0011] In the elevator system 1 shown in Figure 1, the hoistway 50 penetrates each floor of the building 51. The machine room 52 is located directly above the hoistway 50. Multiple landings 53 are provided on each floor of the building 51. Note that the elevator system 1 may include multiple elevator devices not shown. However, the following description will focus on a single elevator device.

[0012] For example, the hoisting machine 2 is located in the machine room 52. The main rope 3 is wound around the hoisting machine 2. The elevator car 4 is located inside the elevator shaft 50. The elevator car 4 is suspended from one side of the main rope 3.

[0013] The elevator car 4 is equipped with a car door 5. The car door 5 can be opened and closed at the landing 53, along with a landing door (not shown). An earthquake detector 6 is installed in the pit, which is the lowest part of the elevator shaft 50. The earthquake detector 6 can detect P-waves and S-waves of an earthquake. P-waves are waves that represent the initial tremors of an earthquake, and the shaking is relatively small. S-waves are waves that represent the main tremors of an earthquake, and the shaking is large. For example, the earthquake detector 6 detects a P-wave when it detects an acceleration that exceeds a specified P-wave threshold. The earthquake detector 6 detects an S-wave when it detects an acceleration that exceeds a specified S-wave threshold. The P-wave threshold and S-wave threshold can be set arbitrarily.

[0014] The control device 10 controls the operation of the elevator system 1 as a whole. The control device 10 can detect the position of the car 4, etc., based on the rotational position of the hoist 2, the detection results of various sensors (not shown), etc. As shown in FIG. 2, the control device 10 includes, as functions, an operation control unit 11, a standby unit 12, an earthquake response unit 13, a situation detection unit 14, and a diagnosis unit 15.

[0015] The operation control unit 11 controls the normal operation of the car 4. For example, when the car 4 is in normal operation, the hoist 2 rotates and drives based on a command from the operation control unit 11. Following the rotational drive of the hoist 2, the main rope 3 moves. Following the movement of the main rope 3, the car 4 moves up and down inside the hoistway 50.

[0016] The standby unit 12 controls the standby operation of the car 4. When standby conditions are satisfied, such as when the state of no call from passengers exceeds a specified time, in the standby operation, the standby unit 12 causes the car 4 to standby at the standby floor. At this time, the standby floor is selected as a low-risk floor where there is a low possibility that the operation of the car 4 will be hindered by an earthquake. For example, a non-resonant floor is selected as the low-risk floor.

[0017] When an earthquake occurs, the operation of the car 4 may be hindered by a long object such as the main rope 3 existing inside the hoistway 50 swinging and colliding with or getting caught on other equipment. Since the car 4 is at a non-resonant floor, even if an earthquake occurs, the effect of the long object swinging is reduced. That is, since the car 4 is parked at a non-resonant floor, the possibility that the operation of the car 4 will be hindered during an earthquake is reduced.

[0018] Hereinafter, a floor that is not a low-risk floor is referred to as a non-low-risk floor. For example, a non-low-risk floor is a resonant floor. A resonant floor is a floor that is not a non-resonant floor. When an earthquake occurs while the car 4 is parked at a resonant floor, the possibility that the operation of the car 4 will be hindered by a long object existing inside the hoistway 50 swinging and colliding with or getting caught on other equipment is higher than when an earthquake occurs while the car 4 is parked at a non-resonant floor.

[0019] When an earthquake occurs, the earthquake response unit 13 controls the response during the earthquake. For example, when an earthquake occurs and the earthquake detector 6 detects the P wave of the earthquake, the earthquake response unit 13 stops the car 4 closest to the waiting state as a controlled operation at the nearest floor. After the car 4 stops, the earthquake response unit 13 opens the car door 5 and controls it to be stationary in the open state. Also, in the elevator system 1, when the earthquake detector 6 detects the S wave while the car 4 is running, the earthquake response unit 13 may stop the car 4 immediately on the spot.

[0020] When the shaking of the S wave subsides and the diagnostic conditions are met, the elevator system 1 automatically performs a diagnostic operation without the need for on-site diagnosis by the maintenance staff of the elevator system 1. After the diagnostic operation, the elevator system 1 returns to the normal operation of the car 4. At this time, the control device 10 selects which diagnostic mode of diagnostic operation to perform according to the situation of the elevator system 1 when the S wave is detected.

[0021] The situation detection unit 14 detects the situation of the elevator system 1 when the S wave is detected by the earthquake detector 6. For example, the situation detection unit 14 regards the time when it receives the signal of detecting the S wave from the earthquake detector 6 as the time when the S wave is detected. For example, the situation detection unit 14 detects the situation of the car 4 and the situation of the car door 5. Specifically, the situation detection unit 14 detects whether the car 4 is in a stopped state or a running state when the S wave is detected. The situation detection unit 14 detects whether the car 4 is stopped at a non-resonant floor which is a low-risk floor or a resonant floor which is a non-low-risk floor when the S wave is detected. The situation detection unit 14, when the S wave is detected, the car door 5 of the stopped car 4 is open in a state or stationary in the fully closed state, and detects which of the situations where the car door 5 of the stopped car 4 is moving by an opening / closing operation. Also, the situation detection unit 14 can detect a situation combining a plurality of situations.

[0022] The diagnostic unit 15 controls the diagnostic operation. At least two diagnostic modes with different required durations are set for the diagnostic operation. The following describes the case where three diagnostic modes are set. Specifically, the elevator system 1 is set to have a short-time diagnostic operation, a medium-time diagnostic operation, and a long-time diagnostic operation.

[0023] In the short-time diagnostic operation, the elevator car 4 travels at the same rated speed as in normal operation. That is, the diagnostic unit 15 collects various data while moving the elevator car 4 at the rated speed and performs a safety diagnosis. Furthermore, the number of diagnostic items in the short-time diagnostic operation may be the fewest compared to the other two diagnostic modes. For example, in the short-time diagnostic operation, the diagnostic items related to the opening and closing of the elevator car door 5 may be simplified or omitted. The time required for the short-time diagnostic operation is the shortest compared to the other two diagnostic modes.

[0024] In the medium-duration diagnostic operation, the elevator car 4 travels at a manual speed. The manual speed is the speed at which an operator manually moves the elevator car 4 during inspections, etc., and is slower than the rated speed. That is, the diagnostic unit 15 collects various data while moving the elevator car 4 at a manual speed and performs a safety diagnosis. The number of diagnostic items in the medium-duration diagnostic operation may be more than that in the short-duration diagnostic operation, and may be fewer than that in the long-duration diagnostic operation. In the medium-duration diagnostic operation, a more precise and in-depth diagnosis is performed compared to the short-duration diagnostic operation. The time required for the medium-duration diagnostic operation is longer than that required for the short-duration diagnostic operation, and shorter than that required for the long-duration diagnostic operation.

[0025] In the long-duration diagnostic operation, the elevator car 4 travels at a very slow speed. This slow speed is slower than the manual speed. That is, the diagnostic unit 15 collects various data while moving the elevator car 4 at a very slow speed and performs a safety diagnosis. The number of diagnostic items in the short-duration diagnostic operation may be the largest compared to the other two diagnostic modes. Thus, the long-duration diagnostic operation provides a more precise and in-depth diagnosis compared to the other two diagnostic modes. Also, if an abnormality occurs inside the elevator shaft 50, the possibility of a more serious abnormality being discovered through the diagnostic operation is the lowest compared to the other two diagnostic modes. The time required for the long-duration diagnostic operation is the longest compared to the other two diagnostic modes.

[0026] The diagnostic unit 15 determines which diagnostic modes to perform and in what order, based on the situation detected by the situation detection unit 14. The combination of what diagnostic operations to perform and in what order can be pre-set, and several patterns are possible.

[0027] The operation control unit 11 restarts the normal operation of the elevator car 4 after the diagnostic mode with the shortest required time, selected from the diagnostic modes determined by the diagnostic unit 15, has been executed, thereby returning to normal operation.

[0028] Specifically, if the diagnostic unit 15 determines that a first control is performed, in which a short-time diagnostic operation is performed after a long-time diagnostic operation, the operation control unit 11 will start normal operation of the elevator car 4 after the short-time diagnostic operation is performed. If the diagnostic unit 15 determines that a second control is performed, in which a short-time diagnostic operation is performed without performing a long-time diagnostic operation, the operation control unit 11 will start normal operation of the elevator car 4 after the short-time diagnostic operation is performed. Even if a diagnostic operation is performed using a single diagnostic mode or a combination of diagnostic modes, rather than the first or second control, the operation control unit 11 will return to normal operation after the diagnostic mode with the shortest required time has been performed.

[0029] Furthermore, if a medium-duration diagnostic operation or a short-duration diagnostic operation is performed after either diagnostic mode, the diagnostic items in the medium-duration or short-duration diagnostic operation that have already been performed in the previous diagnostic mode may be omitted.

[0030] If an abnormality is detected during a diagnostic operation in any of the diagnostic modes, the diagnostic unit 15 will interrupt the diagnostic operation. In this case, the control device 10 will remain stopped until manual recovery work is performed by a worker.

[0031] Next, using Figures 3 to 6, we will explain examples of diagnostic mode combinations and the operation of the control device 10 in those cases. Figures 3 to 6 are flowcharts showing the operation of the control device in Embodiment 1.

[0032] The flowchart in Figure 3 shows an example of how the three diagnostic modes can be combined depending on the situation. Note that before the flowchart starts, elevator car 4 may be stopped on a low-risk or non-low-risk floor due to the detection of P-waves or the fulfillment of standby conditions. For example, the flowchart in Figure 3 starts after P-waves caused by an earthquake are detected.

[0033] In step S001, the earthquake response unit 13 determines whether or not S-waves have been detected by the earthquake detector 6. If no S-waves are detected in step S001, the operation of step S001 is repeated.

[0034] If an S-wave is detected in step S001, the operation in step S002 is performed. In step S002, the status detection unit 14 detects the status of the elevator system 1 at the time the S-wave was detected in step S001.

[0035] Subsequently, in step S003, the diagnostic unit 15 determines whether or not the diagnostic conditions have been met. For example, if the measurement value of the accelerometer provided in the control device 10, etc., is smaller than a predetermined threshold, the diagnostic unit 15 determines that the diagnostic conditions have been met. If it is not determined in step S003 that the diagnostic conditions have been met, the operation in step S003 is repeated.

[0036] If it is determined in step S003 that the diagnostic conditions have been met, the operation in step S004 is performed. In step S004, the diagnostic unit 15 determines whether or not it was detected that the car 4 was in motion when the S wave was detected.

[0037] If it is determined in step S004 that the car 4 is not in motion, that is, that the car 4 is stopped, then the operation in step S005 is performed. In step S005, the diagnostic unit 15 determines whether or not it was detected in step S002 that the car 4 was stopped on a low-risk, non-resonant floor.

[0038] If the situation detected in step S005 is that the elevator car 4 is stopped on a non-resonant floor, the operation in step S006 is performed. In step S006, the diagnostic unit 15 starts a short-time mode diagnostic operation. That is, instead of the first control, the diagnostic unit 15 performs a short-time mode diagnostic operation without performing a longer-duration or medium-duration mode diagnostic operation, which requires a longer time.

[0039] After the diagnostic operation in short-time mode is completed in step S006, in step S007, the operation control unit 11 returns to normal operation and starts normal operation of the elevator car 4. After that, the operation of the flowchart ends.

[0040] If the situation detected in step S005 is that the elevator car 4 is stopped on a resonant floor which is a non-low-risk floor, then the operation in step S008 is performed. In step S008, the diagnostic unit 15 determines whether the situation detected in step S002 was that the elevator car door 5 was moving.

[0041] In step S008, if it is determined that the situation detected in step S002 was not a situation in which the car door 5 was moving, that is, a situation in which the car door 5 was stationary, then the operation in step S009 is performed. In step S009, the diagnostic unit 15 starts a diagnostic operation in medium-time mode.

[0042] After the diagnostic operation in the medium-time mode is completed in step S009, the operation in step S006 is performed. That is, the diagnostic unit 15 performs a diagnostic operation in the medium-time mode without performing a diagnostic operation in the long-time mode, and then performs a diagnostic operation in the short-time mode, which requires less time. This control can also be considered as the first control. Subsequently, the operation in step S007 is performed.

[0043] If, in step S004, it is determined that the car 4 was moving when the S wave was detected, or if, in step S008, it is determined that the car door 5 was moving, then the operation in step S010 is performed. In step S010, the diagnostic unit 15 starts a long-duration diagnostic operation.

[0044] After the long-duration diagnostic operation is completed in step S010, the operation in step S006 is performed. That is, the diagnostic unit 15 performs a second control, which is to perform a short-duration diagnostic operation after performing a long-duration diagnostic operation. After that, the operation in step S007 is performed.

[0045] Furthermore, after the long-duration diagnostic operation is completed in step S010, the operation in step S009 may be performed. That is, the diagnostic unit 15 may perform control to sequentially perform diagnostic operations in long-duration mode, medium-duration mode, and short-duration mode.

[0046] In steps S006, S009, and S010, if an abnormality is detected during the diagnostic operation, the flowchart will terminate without returning to normal operation.

[0047] The flowchart in Figure 4 shows the operation in which the short-time diagnostic operation is not performed, in contrast to the flowchart in Figure 3. In this case, the diagnostic mode that requires the shortest time for diagnosis becomes the medium-time mode. That is, step S009 is performed instead of step S006. After the medium-time diagnostic operation is completed in step S009, the operation in step S007 is performed.

[0048] A control system in which a diagnostic operation in a medium-duration mode is performed after a diagnostic operation in a long-duration mode may be considered a first control system. A control system in which a diagnostic operation in a medium-duration mode is performed without a diagnostic operation in a long-duration mode may be considered a second control system.

[0049] The flowchart in Figure 5 shows the operation when the only item for determining the diagnostic mode is whether or not it has been detected that car 4 is stopped on a non-resonant floor.

[0050] If it is determined in step S003 that the diagnostic conditions are met, the operation in step S005 is performed. If the detected situation in step S005 is that the elevator car 4 is stopped on a non-resonant floor, the operation in step S006 is performed. That is, the diagnostic unit 15 performs a second control, which is to perform a short-time diagnostic operation without performing a medium-time diagnostic operation.

[0051] If the situation detected in step S005 is that the elevator car 4 is stopped at the resonant floor, the operation in step S009 is performed. After the operation in step S009, the operations from step S006 onwards are performed. That is, the diagnostic unit 15 performs a first control, which involves performing a diagnostic operation in medium-time mode, followed by a diagnostic operation in short-time mode.

[0052] In addition, instead of performing a diagnostic operation in medium-duration mode in step S009, a diagnostic operation in long-duration mode may be performed.

[0053] The flowchart in Figure 6 shows the operation when the only item for determining the diagnostic mode is whether or not it is detected that the cage 4 is moving.

[0054] If it is detected in step S003 that the diagnostic conditions have been met, the operation in step S004 is performed. If it is determined in step S004 that the detected situation is that the car 4 is stopped, the operation in step S006 is performed. That is, the diagnostic unit 15 performs a second control, which is to perform a short-time diagnostic operation without performing a long-time diagnostic operation.

[0055] If, in step S004, it is determined that the detected situation is that the car 4 is in motion, the operation in step S010 is performed. After the long-duration diagnostic operation is completed in step S010, the operation in step S006 is performed. That is, the diagnostic unit 15 performs a first control, which involves performing a long-duration diagnostic operation followed by a short-duration diagnostic operation.

[0056] In addition, instead of performing a long-duration diagnostic operation in step S010, a medium-duration diagnostic operation may be performed.

[0057] According to Embodiment 1 described above, the control device 10 of the elevator system 1 includes a situation detection unit 14, a diagnostic unit 15, and an operation control unit 11 as its functions. When an S-wave is detected, the diagnostic unit 15 selects, depending on the situation, a first control that performs a long-duration diagnostic operation, which requires a long time, followed by a short-duration diagnostic operation, and a second control that performs only a short-duration diagnostic operation. In conventional diagnostic operations, the first control was performed, in which the diagnosis was carried out while gradually increasing the speed of the elevator car from a very slow speed. Depending on the situation when the S-wave is detected, it may not be necessary to perform a precise diagnostic operation that includes unnecessary inspection items. In such cases, the second control can be performed. In the second control, the diagnostic operation is completed in a shorter time compared to the first control. Therefore, after an earthquake, the elevator system 1 can be automatically diagnosed, and the operation of the elevator car 4 can be resumed more quickly.

[0058] Furthermore, the diagnostic unit 15 selects whether to execute the first control or the second control depending on whether the elevator car 4 was stopped on a low-risk floor or a non-low-risk floor when the S-wave was detected. In particular, low-risk floors are non-resonant floors, and non-low-risk floors are resonant floors. Therefore, if the elevator car 4 is stopped on a low-risk floor, the operation of the elevator car can be resumed more quickly.

[0059] Furthermore, the diagnostic unit 15 selects whether to execute the first control or the second control depending on whether the car 4 was stopped or moving when the S-wave was detected. This allows the car to resume operation more quickly when the risk of failure is low, such as when the car 4 is stopped.

[0060] Furthermore, the diagnostic unit 15 selects whether to execute the first or second control depending on whether the car door 5 was stationary or moving when the S-wave was detected. The long-time mode and short-time mode refer to two diagnostic modes, one with a relatively long time required for diagnostic operation and the other with a relatively short time. Therefore, when the risk of failure is low, such as when the car door 5 is stationary, the operation of the car 4 can be resumed more quickly.

[0061] Furthermore, the diagnostic unit 15 performs diagnostic operations in long-time mode, medium-time mode, and short-time mode, individually or in combination, depending on the circumstances when an S-wave is detected. This allows for the earlier resumption of operation of the elevator car 4, depending on the low risk of failure.

[0062] In addition, the elevator system 1 may have multiple elevator cars 4, and some cars 4 may be stationed on non-resonant floors and others on resonant floors as standby floors. In this case as well, the same control as in Embodiment 1 should be applied to each individual elevator car 4. Although elevator cars 4 stationed on non-resonant floors have low operational efficiency under normal operation, they can be restored to service faster than elevator cars 4 stationed on resonant floors during an earthquake. Therefore, the elevator system 1 can improve operational efficiency during earthquakes.

[0063] Next, an example of the hardware constituting the control device 10 will be explained using Figure 7. Figure 7 is a hardware configuration diagram of the control device in Embodiment 1.

[0064] Each function of the control device 10 can be realized by a processing circuit. For example, the processing circuit includes at least one processor 100a and at least one memory 100b. For example, the processing circuit includes at least one dedicated hardware 200.

[0065] When the processing circuit comprises at least one processor 100a and at least one memory 100b, each function of the control device 10 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 100b. At least one processor 100a realizes each function of the control device 10 by reading and executing the program stored in at least one memory 100b. At least one processor 100a is also called a central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. For example, at least one memory 100b is a non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, EEPROM, magnetic disk, flexible disk, optical disk, compact disk, minidisc, DVD, etc.

[0066] If the processing circuit includes at least one dedicated hardware 200, the processing circuit may be implemented as, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. For example, each function of the control unit 10 may be implemented by a processing circuit. For example, each function of the control unit 10 may be implemented together by a processing circuit.

[0067] For each function of the control device 10, some may be implemented by dedicated hardware 200, and others by software or firmware. For example, the function of performing diagnostics during diagnostic operation may be implemented by a processing circuit as dedicated hardware 200, while functions other than the function of performing diagnostics during diagnostic operation may be implemented by at least one processor 100a reading and executing a program stored in at least one memory 100b.

[0068] In this way, the processing circuit realizes each function of the control device 10 using hardware 200, software, firmware, or a combination thereof.

[0069] Furthermore, at least some of the functions of the control device 10 may be implemented on a cloud server. In this case, the processing circuit is composed of multiple sub-circuits. Each of the multiple sub-processing circuits is provided on multiple devices that make up the cloud server. Each of the multiple devices that make up the cloud server may be located in a different building. In this case, the functions of the control device 10 that are implemented on the cloud server are involved in the control of the elevator system by communicating with the elevator system's control panel via the network. [Explanation of Symbols]

[0070] 1 Elevator system, 2 Hoisting machine, 3 Main rope, 4 Car, 5 Car door, 6 Earthquake detector, 10 Control device, 11 Operation control unit, 12 Standby unit, 13 Earthquake response unit, 14 Situation detection unit, 15 Diagnostic unit, 50 Hoistway, 51 Building, 52 Machine room, 53 Landing, 100a Processor, 100b Memory, 200 Hardware

Claims

1. An elevator control device that, after the elevator car stops due to an earthquake, automatically performs a diagnostic operation on the car and returns to normal operation, A condition detection unit that detects the condition of the cage when S-waves caused by an earthquake are detected by an earthquake detector, A diagnostic unit that performs a first control to perform a diagnostic operation in a short-time mode, which requires less time than the long-time mode, after performing a diagnostic operation in a long-time mode. An operation control unit controls the normal operation of the aforementioned car, and after an S-wave caused by an earthquake is detected and the short-time diagnostic operation is completed, starts the normal operation of the aforementioned car. Equipped with, The diagnostic unit, in accordance with the situation detected by the situation detection unit, executes a second control that performs the short-time diagnostic operation without performing the long-time diagnostic operation, instead of the first control. Control device.

2. When an S-wave is detected, the situation detection unit detects whether the elevator car is stopped on a low-risk floor where the likelihood of disruption to operations due to the earthquake is low, or on a non-low-risk floor that is not a low-risk floor. The aforementioned diagnostic unit, If an S-wave is detected and it is determined that the elevator car is stopped at the low-risk floor, the second control is executed. If an S-wave is detected and it is determined that the elevator car is stopped on the non-low-risk floor, the first control is executed. The control device according to claim 1.

3. The situation detection unit, upon detecting an S-wave, detects whether the elevator car is stationary or in motion. The aforementioned diagnostic unit, If it is detected that the car is stopped when an S-wave is detected, the second control is executed. If it is detected that the cage is in motion when an S-wave is detected, the first control is executed. The control device according to claim 1.

4. When an S-wave is detected, the situation detection unit detects whether the car door of the stationary car is stationary or moving. The aforementioned diagnostic unit, If it is detected that the car door of the stationary car is stationary when an S-wave is detected, the second control is executed. If it is detected that the car door of the stationary car is moving when an S-wave is detected, the first control is executed. The control device according to claim 1.

5. When an S-wave is detected, the situation detection unit detects which of the following situations is occurring: the elevator car is moving; the elevator car is stopped on a low-risk floor where the possibility of disruption to operations due to the earthquake is low; the elevator car is stopped on a non-low-risk floor and the elevator car door is stationary; or the elevator car is stopped on a non-low-risk floor and the elevator car door is moving. The aforementioned diagnostic unit, It is possible to have the cage perform a diagnostic operation in a medium-time mode, which requires a longer time than the short-time mode and a shorter time than the long-time mode. If it is detected that the elevator car is stopped on the low-risk floor when an S-wave is detected, the first control is executed. If it is detected that the elevator car is moving when an S-wave is detected, or that the elevator car is stopped on a non-low-risk floor and the elevator car door is moving when an S-wave is detected, the second control is executed. If an S-wave is detected and it is determined that the elevator car is stopped on a non-low-risk floor and the elevator car door is stationary, then instead of the first control, a control is executed in which the diagnostic operation in the medium-time mode is performed first, followed by the diagnostic operation in the short-time mode, without performing the diagnostic operation in the long-time mode. The control device according to claim 1.

6. The low-risk floor is a non-resonant floor that is determined to have a low probability of causing malfunctions in the equipment inside the elevator shaft due to the shaking of long objects in the elevator shaft when an earthquake occurs while the elevator car is stopped. The aforementioned non-low-risk floor is a resonant floor in which, if an earthquake occurs while the elevator car is stopped, the likelihood of the long object shaking and causing malfunctions in the equipment inside the elevator shaft is determined to be higher than the likelihood when the elevator car is stopped on a non-resonant floor. The control device according to claim 2 or claim 5.

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