Elevator diagnostic device and elevator diagnostic method

Abstract

Provided is an elevator diagnostic device having an abnormality detection unit that detects an abnormality on the counterweight side on the basis of a signal acquired from a detection device installed in a car.

Description

Elevator diagnostic device and elevator diagnostic method

[0001] The present invention relates to an elevator diagnostic device and an elevator diagnostic method.

[0002] One technique relating to an elevator diagnostic device and method is disclosed in Patent Document 1 below. Patent Document 1 describes a configuration that "includes a detection mechanism that includes magnets arranged at intervals facing a guide rail that supports a counterweight and that uses the magnetic force of the magnets on the guide rail to detect when the counterweight has come off the guide rail, a wireless communication device that emits a rail-off detection signal when the detection mechanism detects that the counterweight has come off the guide rail, and a battery that supplies the required power to the wireless communication device," and claims that the device will detect when the counterweight has come off the rail.

[0003] Japanese Patent Application Laid-Open No. 2022-36525

[0004] However, the technology of Patent Document 1 requires the installation of additional components such as magnets, detection mechanisms, radios, and batteries to existing elevators, and there is also the risk of the added components being installed improperly or breaking down.

[0005] Therefore, an object of the present invention is to provide an elevator diagnostic device and an elevator diagnostic method that are capable of detecting abnormalities on the counterweight side without adding new parts to an existing elevator.

[0006] In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above problems, and one example thereof is an elevator diagnostic device having an abnormality detection unit that detects an abnormality on the counterweight side based on a signal acquired from a detection device installed in the elevator car.

[0007] The present invention can provide an elevator diagnostic device and an elevator diagnostic method that can detect abnormalities on the counterweight side without adding new parts to an existing elevator.

[0008] FIG. 1 is a block diagram for explaining the configuration of an elevator diagnostic device according to an embodiment. FIG. 2 is a diagram showing an example of an elevator having an elevator diagnostic device according to an embodiment. FIG. 3 is a diagram for explaining the configuration of a car in which a detection device is arranged. FIG. 4 is a plan view showing the configuration under the floor of a car in which a load sensor is arranged as a detection device. FIG. 5 is a side view showing the configuration under the floor of a car in which a load sensor is arranged as a detection device. FIG. 6 is a diagram for explaining the configuration of a counterweight. FIG. 7 is a diagram for explaining thresholds for detecting derailment. FIG. 8 is a diagram showing patterns of derailment of a counterweight. FIG. 9 is a diagram explaining thresholds stored in a threshold storage unit. FIG. 10 is a flowchart showing an elevator diagnostic method according to an embodiment.

[0009] Hereinafter, embodiments to which the present invention is applied will be described in detail with reference to the drawings. <Elevator Diagnostic Device> Fig. 1 is a block diagram for explaining the configuration of an elevator diagnostic device 100a according to an embodiment. As shown in Fig. 1, the elevator diagnostic device 100a is provided, for example, in the elevator control device 10 of each elevator 1. Although only one elevator 1 is illustrated here, each elevator 1 is remotely managed by a single management device 2. Although the elevator diagnostic device 100a may be provided in this management device 2, the following description will be given assuming that the elevator diagnostic device 100a is provided in the elevator control device 10 of each elevator 1.

[0010] The elevator control device 10 including the elevator diagnostic device 100a is configured by a computer. The computer is hardware used as a so-called computer, and includes a CPU (Central Processing Unit), non-volatile storage units such as RAM (Random Access Memory) and ROM (Read Only Memory), and a network interface.

[0011] The elevator diagnostic device 100a is one of the functional configurations of the elevator control device 10, and detects abnormalities in the elevator 1 based on signals from a detection device 70, which will be described later. Before describing the configuration of the elevator diagnostic device 100a, the configuration of the elevator 1 in which the elevator diagnostic device 100a is installed will be described below.

[0012] <Elevator Configuration> Figure 2 is a diagram showing an example of an elevator 1 having an elevator diagnostic device 100a according to an embodiment. The elevator 1 shown in Figure 2 includes an elevator control device 10 equipped with the elevator diagnostic device 100a, a car 20, a counterweight 30, and a main rope 40 fixed to the car 20 and the counterweight 30 at both ends. The elevator 1 also includes a hoist 50 around which the main rope 40 is reeled, a guide rail 21 that guides the travel of the car 20 driven by the hoist 50, and a guide rail 31 that guides the travel of the counterweight 30. The elevator 1 also includes a door opening / closing device 60 above the car 20 that controls the opening and closing of a car door 20a of the car 20, and a detection device 70 below the car 20.

[0013] The detection device 70 is provided in the car 20, and examples thereof include a load sensor for detecting the load inside the car 20, an acceleration sensor for detecting vibrations of the car 20, and a camera or microphone for detecting abnormalities in the running of the car 20. These detection devices 70 are provided in appropriate locations such as above or below the car 20.

[0014] Of these, the elevator control device 10 and the hoisting machine 50 are installed, for example, in a machine room 1b provided above the hoistway 1a through which the car 20 travels. However, the elevator 1 may be configured without a machine room 1b, in which case the elevator control device 10 and the hoisting machine 50 are placed in the hoistway 1a. In addition, the roping system of the main ropes is not limited to the 1:1 shown in the figure, and may be any other system such as 2:1 or 4:2.

[0015] Fig. 3 is a diagram illustrating the configuration of the car 20 in which the detection device 70 is disposed. As shown in Fig. 3, the car 20 is composed of a car frame 201 and a car compartment 202 supported by the car frame 201. The car frame 201 is composed of a lower frame 201a, an upper frame 201b, and a vertical frame 201c erected between the lower frame 201a and the upper frame 201b, and the main ropes 40 are fixed to the upper frame 201b. The car compartment 202 has a car door 20a and is supported on the lower frame 201a via an elastic member 203 for vibration isolation.

[0016] The car 20 also has two guide devices 204 attached to the car frame 201. The guide devices 204 slidably hold the guide rails 21 arranged on both sides of the car 20 and guide the travel of the car 20. The guide devices 204 for the car 20 may be of a roller type or a shoe type.

[0017] Fig. 4 is a plan view showing the configuration under the floor of the car 20 in which a load sensor is arranged as the detection device 70. Fig. 5 is a side view showing the configuration under the floor of the car 20 in which a load sensor is arranged as the detection device 70, and is a view of part [A] in Fig. 4 as seen from the "x" direction. As shown in Figs. 4 and 5, an underfloor base 202a of the car room 202 is placed on top of a lower frame 201a that constitutes the car frame 201 via an elastic member 203 (see Fig. 3). The underfloor base 202a is a base member that supports a floor panel 202b (see Fig. 5) of the car room 202.

[0018] A load sensor bracket 22 is fixed to the underfloor base 202a in a state where it hangs down. The load sensor bracket 22 has a load detection surface 22a (see FIG. 5) that is held horizontally when fixed to the underfloor base 202a. Meanwhile, a load sensor 71 serving as a detection device 70 is fixed to the lower frame 201a of the car frame 201 via a mounting bracket 23.

[0019] The load sensor 71 is a detection device 70 for detecting the load inside the car 20. The load sensor 71 has a sensor surface 70a (see FIG. 5 ) disposed opposite the load detection surface 22a of the load sensor bracket 22, and outputs a signal corresponding to the distance [d] between the sensor surface 70a and the load detection surface 22a of the load sensor bracket 22.

[0020] Figure 6 is a diagram illustrating the configuration of the counterweight 30, showing the counterweight 30 as viewed from above. As shown in Figure 6, the counterweight 30 has guide devices 302 attached to both sides of a weight body 301. The guide devices 302 slidably hold guide rails 31 arranged on both sides of the counterweight 30 and guide the travel of the counterweight 30. The guide devices 302 for the counterweight 30 are typically of the shoe type.

[0021] 1 , in the elevator 1 configured as described above, the elevator control device 10 has an operation control device 100 and an elevator diagnostic device 100a. The operation control device 100 detects the load inside the car 20 based on a signal from the detection device 70, and further controls the operation of the hoisting machine 50 and the door opening and closing device 60 based on signals from other detectors not shown here.

[0022] Furthermore, the elevator diagnostic device 100a diagnoses the state of the elevator 1 based on a signal from a detection device 70 installed in the elevator car. The configuration of the elevator diagnostic device 100a will be described below.

[0023] <Configuration of the Elevator Diagnostic Device 100a> The elevator diagnostic device 100a performs automatic diagnosis to determine whether or not temporary recovery operation can be initiated after an earthquake, for example. Furthermore, as a preprocessing step before starting automatic diagnostic operation, the elevator diagnostic device 100a detects elevator abnormalities based on signals acquired from a detection device 70 installed in the car. The detection device 70 may be any detection device installed in the car, such as an acceleration sensor, a camera, or a microphone, in addition to the load sensor 71 described above. The elevator abnormalities detected here are primarily abnormalities in the counterweight, which are abnormalities that generate abnormal vibrations or abnormal sounds when the counterweight stops. Examples of such abnormalities include a counterweight coming off the rail, a weight that constitutes the counterweight falling off, an abnormal pulley, and deformation of the guide device. The elevator diagnostic device 100a has functional units, including a threshold storage unit 101, an abnormality detection unit 102, an automatic diagnosis unit 103, and a communication unit 104. Each functional unit has the following functions:

[0024] [Threshold storage unit 101] The threshold storage unit 101 stores a threshold value for detecting an abnormality on the counterweight side, which is set for a signal from the detection device 70 installed in the car. Here, the threshold value for detecting an abnormality on the counterweight side is stored. Fig. 7 is a diagram for explaining a threshold value [th] for detecting a counterweight coming off the rail, as an example of a threshold value for detecting an abnormality on the counterweight side.

[0025] Referring to FIG. 2 , the car 20 and the counterweight 30 are connected via the main ropes 40, and the counterweight 30 also runs / stops in response to the running / stopping of the car 20. In this state, if the counterweight 30 comes off the guide rail 31 (a "rail slippage"), the contact area between the counterweight 30 and the guide rail 31 decreases, and the running resistance of the counterweight 30 decreases. As a result, when the running car 20 stops, the counterweight 30, which is connected to the car 20 via the main ropes 40, vibrates up and down and left and right more than in normal situations when there is no rail slippage. Such abnormal vibrations are transmitted to the car 20 via the main ropes 40, causing the car 20 to vibrate and make abnormal sounds that differ from normal vibrations. Therefore, a detection device 70 installed on the car 20 side can detect abnormal vibrations of the car 20 or abnormal sounds generated by the abnormal vibrations, thereby detecting an abnormality on the counterweight 30 side. Therefore, a threshold value [th] is set for detecting the occurrence of an abnormality in a signal acquired from the detection device 70 installed in the car 20 in association with the operation of stopping the car 20 (see FIG. 7). This threshold value [th] is assumed to be a value obtained experimentally.

[0026] FIG. 8 is a diagram showing patterns in which the counterweight 30 deviates from the rail. As shown in FIG. 8, there are multiple patterns in which the counterweight 30 deviates from the rail. For example, pattern (1) is a pattern in which only one end of the counterweight 30 deviates from the guide rail 31. Pattern (2) is a pattern in which both ends of the counterweight 30 deviate from the guide rail 31 in different directions. Pattern (3) is a pattern in which both ends of the counterweight 30 deviate from the guide rail 31 in the same direction. In cases in which the counterweight 30 deviates from the rail in each of patterns (1) to (3) and other possible patterns, as well as in the case in which the counterweight 30 does not deviate from the rail ( FIG. 6 ), an operation is performed to stop the traveling car 20, and a signal is acquired from the detection device 70 at that time (see FIG. 7 ). Then, based on each of the acquired signals, a threshold value [th] is set to distinguish between cases in which the car 20 deviates from the rail and cases in which the car 20 does not deviate from the rail.

[0027] Furthermore, the signal value of the detection device 70 varies depending on the height position of the car 20. Therefore, it is preferable to set the threshold value [th] for each height position at which the car 20 is stopped as necessary. Figure 9 is a diagram illustrating the threshold value [th] stored in the threshold value storage unit 101 (see Figure 1). As shown in Figure 9, the threshold value storage unit 101 stores respective threshold values ​​[th] (a1, a2, a3) corresponding to the height positions of the car 20, for example, lower floors, middle floors, and upper floors. These threshold values ​​[th] are obtained based on experimental data for the respective height positions. The division into lower floors, middle floors, and upper floors and the number of height position (floor) divisions may be appropriately set depending on the configuration of each elevator.

[0028] In the above, the threshold value [th] has been explained using the example of the case where the abnormality on the counterweight 30 side is a rail slippage, but this threshold value [th] is a value experimentally determined for each type of abnormality on the counterweight 30 side and for each type of detection device installed in the elevator car 20.

[0029] [Abnormality detection unit 102] Returning to Fig. 1 , the abnormality detection unit 102 detects an abnormality in the elevator based on a signal from the detection device 70 installed on the car 20 side and the threshold value stored in the threshold value storage unit 101. The abnormality in the elevator detected here is, for example, an abnormality related to whether or not the elevator operation, including the automatic diagnostic operation described below, can be started, and is mainly an abnormality on the side of the counterweight 30 (see Fig. 2). Details of the procedure for abnormality detection by the abnormality detection unit 102 will be described in detail below in the elevator diagnostic method.

[0030] [Automatic Diagnosis Unit 103] When no abnormality is detected by the abnormality detection unit 102, the automatic diagnosis unit 103 performs automatic diagnosis involving automatic diagnostic operation. Here, the automatic diagnostic operation is a diagnostic operation of the car 20 (see FIG. 2 ) to diagnose whether or not a temporary recovery operation can be performed, for example, when an earthquake occurs. This diagnostic operation includes the running operation of the car 20 and the opening and closing operation of the car door. The automatic diagnosis unit 103 diagnoses whether or not a temporary recovery operation can be performed based on information obtained by this automatic diagnostic operation.

[0031] [Communication Unit 104] The communication unit 104 notifies the management device 2 of the result of abnormality detection by the abnormality detection unit 102 and the diagnosis result by the automatic diagnosis unit 103.

[0032] <Elevator Diagnostic Method> FIG. 10 is a flowchart showing an elevator diagnostic method according to an embodiment. The elevator diagnostic method shown in this flowchart shows the steps of an elevator diagnostic method implemented in accordance with a program stored in the elevator diagnostic device 100a shown in FIG. 1. This flow starts when the operation control device 100 of the elevator control device 10 suspends elevator operation due to the occurrence of an earthquake. The flow from the occurrence of an earthquake to diagnostic operation is shown below. If an earthquake occurs and a sensor that detects the first earthquake wave is activated, elevator operation is suspended. On the other hand, if the sensor that detects the first earthquake wave is not activated, the elevator is suspended for a predetermined period of time and then returns to normal operation. In this case, the elevator returns to normal operation without performing diagnostic operation. The elevator diagnostic method will be described below in the order of the flowchart in FIG. 10 and with reference to FIG. 1 and other figures.

[0033] [Step S101] In step S101, the automatic diagnosis unit 103 determines whether or not it is OK to start a diagnosis for temporary recovery operation. In this case, the automatic diagnosis unit 103 may determine whether or not to start the diagnosis according to a general determination procedure. For example, when the automatic diagnosis unit 103 determines that a predetermined time has elapsed after the vibrations caused by the earthquake have subsided to a predetermined state, that the safety devices are not operating, that the car 20 is stopped at the nearest floor, and that there are no passengers in the car 20, the automatic diagnosis unit 103 determines that it is OK to start the diagnosis (YES) and proceeds to the next step S102. Note that the determination of whether or not there are passengers in the car 20 is made based on a signal detected by the load sensor 71.

[0034] [Step S102] In step S102, the abnormality detection unit 102 controls the hoist 50 to perform a stopping operation to stop the car 20 after traveling a short distance. In this case, the counterweight 30, which is connected to the car 20 via the main rope 40, also moves a distance corresponding to the traveling distance of the car 20 and then stops. The traveling distance of the car 20 and the counterweight 30 here may be unrelated to the position of the landing door 80 (see FIG. 2 ); what is important is to perform a stopping operation to stop the car 20 and the counterweight 30 in a traveling state. In other words, the short-distance traveling of the car 20 and the counterweight 30 here includes a stopping operation associated with short-distance traveling. Specifically, short-distance traveling and stopping refer to, for example, intermittent operation in which operation and stopping are repeated once or multiple times. The stopping operation of the car 20 and the counterweight 30 is preferably performed at the same acceleration (deceleration) as when the car 20 and the counterweight 30 are stopped while traveling under normal circumstances. Furthermore, this short-distance traveling may be performed by traveling the car 20 and the counterweight 30 at a low speed, not at a high speed.

[0035] Furthermore, during this short-distance travel, the abnormality detection unit 102 causes the car 20 to travel in a direction based on the stopping position information of the car 20 held by the operation control device 100. For example, when the stopping position of the car 20 is on the top floor, the abnormality detection unit 102 causes the car 20 to travel a short distance in a downward direction. When the stopping position of the car 20 is on the bottom floor, the abnormality detection unit 102 causes the car 20 to travel a short distance in an upward direction. When the stopping position of the car 20 is on an intermediate floor, the abnormality detection unit 102 causes the car 20 to travel a short distance in a predetermined direction (for example, a direction in which the car 20 and the counterweight 30 move away from each other).

[0036] [Step S103] In step S103, the abnormality detection unit 102 acquires a signal detected by the detection device 70, such as a load sensor, during the stopping operation in step S102.

[0037] The above steps S102 and S103 may be configured to be repeatedly performed a preset number of times. In this case, the short-distance travel of the car 20 in step S102 may be configured to return the car 20 to its original stopping position by repeating a downward and upward movement.

[0038] [Step S104] In step S104, the abnormality detection unit 102 determines whether the fluctuation range of the signal acquired in step S103 is within the threshold value [th]. At this time, the abnormality detection unit 102 extracts the threshold value [th] (see FIG. 9 ) corresponding to the stopping position of the car 20 from the threshold value storage unit 101 based on the current stopping position information of the car 20 held by the operation control device 100. If the signal acquired in step S103 does not exceed the extracted threshold value [th], the abnormality detection unit 102 determines that the signal is within the threshold value [th] (YES) and proceeds to step S105. On the other hand, if the signal acquired in step S103 exceeds the extracted threshold value [th], the abnormality detection unit 102 determines that the signal is not within the threshold value [th] (NO), i.e., that an abnormality has occurred, and proceeds to step S105a.

[0039] In addition, in the case where steps S102 and S103 are repeated multiple times, the signal acquired in step S103 is determined to be not within the threshold value [th] (NO) if it exceeds the threshold value [th] at least once, exceeds the threshold value [th] multiple times, or the average value exceeds the threshold value [th], as determined in advance.

[0040] [Step S105a] In step S105a, the abnormality detection unit 102 instructs the communication unit 104 to notify the management device 2 of the occurrence of derailment, and the process proceeds to step S106a. Upon receiving the instruction, the communication unit 104 transmits a notification of the occurrence of derailment of the counterweight 30 to the management device 2. This enables the management device 2 to notify the maintenance staff of the occurrence of derailment, and to prompt the maintenance staff to prepare for restoration of the elevator 1 in which the derailment occurred.

[0041] [Step S106a] In step S106a, the abnormality detection unit 102 instructs the operation control device 100 to suspend operation of the elevator 1, and proceeds to step S107a.

[0042] [Step S107a] In step S107a, the abnormality detection unit 102 instructs the operation control device 100 to continue the suspended state until a maintenance technician, who is a professional elevator technician, inspects the elevator, and then ends the process. As a result, the operation control device 100, which has received the instruction, prohibits the operation of the elevator until the maintenance technician resolves the abnormal state.

[0043] [Steps S105-S107] Step S105 is a step to which the process proceeds if step S104 determines that the value is within the threshold range (YES). In step S105, automatic diagnosis unit 103 starts automatic diagnosis operation. Next, in step S106, automatic diagnosis unit 103 determines whether automatic diagnosis operation has been performed normally. In this case, if automatic diagnosis unit 103 does not detect an abnormality, it determines that the system is normal (YES) and proceeds to step S107, but if an abnormality is detected, it determines that the system is not normal (NO) and proceeds to step S109.

[0044] In step S107, the automatic diagnosis unit 103 determines whether all the diagnostic items have been completed. If it determines that all the diagnostic items have been completed (YES), all the diagnostic items are normal, and the process proceeds to the next step S108. On the other hand, if the automatic diagnosis unit 103 determines that all the diagnostic items have not been completed (NO), the process proceeds to step S105, where the next automatic diagnosis operation is started. In the above, the automatic diagnosis operations in step S105 are, for example, a low-speed diagnosis operation, a high-speed diagnosis operation, and a door opening / closing diagnosis operation.

[0045] [Step S108] Step S108 is the step that is reached after all diagnostic items in step S107 have been successfully completed. In step S108, the automatic diagnosis unit 103 authorizes the operation control device 100 to perform recovery operation and terminates the process. As a result, the operation control device 100 temporarily restores the elevator 1 in accordance with a temporary recovery operation program stored in advance.

[0046] [Steps S109-S110] Step S109 is a step to which the system proceeds after determining in step S106 that the elevator is not normal (NO). In step S109, the automatic diagnosis unit 103 stops the automatic diagnosis operation. Thereafter, in step S110, the automatic diagnosis unit 103 instructs the communication unit 104 to notify the management device 2 of the occurrence of an abnormality. Upon receiving the instruction, the communication unit 104 transmits a notification of the occurrence of an abnormality in the automatic diagnosis operation to the management device 2. This enables the management device 2 to notify the maintenance personnel that a rail has come off, and to prompt the maintenance personnel to prepare for recovery of the elevator 1 in which the abnormality occurred during the automatic diagnosis operation.

[0047] [Steps S111-S112] Step S111 is a step in which a maintenance technician with specialized elevator skills inspects the elevator after step S107a, step S108, or step S110 is completed. The steps up to this point have been temporary restoration steps; when performing a full restoration, inspections are performed to discover any faulty parts or bolts loosened by the earthquake, and parts are replaced or bolts are retightened, continuing until the elevator is able to operate normally. Once normal operation is achieved, the full restoration work is completed, and the process proceeds to step S112. In step S112, the maintenance technician instructs the operation control device 100 of the elevator 1 to perform a full restoration, which completes the full restoration of the elevator 1 and ends the process.

[0048] Effect of the embodiment According to the embodiment described above, it is possible to detect an abnormality such as the counterweight 30 coming off the rails based on a signal from a detection device 70 such as a load sensor 71 for detecting a live load that is originally installed on the car 20 of the elevator 1. This makes it possible to detect an abnormality on the counterweight 30 side by the detection device 70 on the car 20 side without adding any new parts to the existing elevator 1.

[0049] In the above embodiment, a configuration has been described in which an abnormality in the counterweight 30 is detected based on a signal from the detection device 70 installed in the car 20. However, the diagnosis based on the signal from the detection device 70 installed in the car 20 is not limited to an abnormality in the counterweight 30, and can also be applied to, for example, detecting a car 20 coming off the rails based on a signal from the load sensor 71, and similar diagnosis is possible. Furthermore, the detection of an abnormality based on the signal from the detection device 70 is not limited to detecting a rail coming off, and can be similarly applied to, for example, detecting a malfunction in the guide device 204 (see FIG. 3) of the car 20, such as a roller failure in the case of a roller-type guide device. In this case, the threshold storage unit 101 stores thresholds corresponding to the respective abnormality detections.

[0050] Furthermore, the load sensor 71, which is exemplified as one of the detection devices 70, has been described as being configured to be disposed under the floor of the car 20. However, the location of the load sensor 71 is not limited to this, and any load sensor 71 for detecting live load that is originally installed in the elevator 1 can be used in the same manner. The load sensor 71 may be, for example, one provided on the top of the car 20, or a load sensor 71' provided on the rope end 40a of the main rope 40 (see FIG. 3). The rope end 40a of the main rope 40 is fixed to the upper frame 201b of the car 20 via an elastic member, and even a load sensor 71' provided on this rope end 40a can be used in the same manner as the load sensor 71 of the above-described embodiment.

[0051] Furthermore, the elevator diagnostic device 100a is provided in the elevator control device 10 of each elevator 1. However, the elevator diagnostic device 100a may also be provided in a management device 2 that remotely manages each elevator 1. In this case, the threshold storage unit 101 of the elevator diagnostic device 100a individually stores a threshold value [th] corresponding to each elevator. In this case, a signal acquired by a detection device 70 installed in the car 20 of each elevator 1 is transmitted to the management device 2, and the elevator diagnostic device 100a provided in the management device 2 is configured to perform at least steps S102-S107a of the elevator diagnostic method shown in FIG. 10 .

[0052] The present invention is not limited to the above-described embodiments and modifications, and includes various other modifications. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and are not necessarily limited to those including all of the described configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace part of the configuration of each embodiment with other configurations.

[0053] DESCRIPTION OF SYMBOLS 1: Elevator 2: Management device 10: Elevator control device 20: Car 21: Guide rail 30: Counterweight 31: Guide rail 70: Detection device 71, 71': Load sensor 100: Operation control device 100a: Elevator diagnostic device 101: Threshold value storage unit 102: Abnormality detection unit 103: Automatic diagnosis unit 104: Communication unit 204: Guide device (car side) 302: Guide device (counterweight side)

Claims

1. An elevator diagnostic device having an abnormality detection unit that detects an abnormality on the counterweight side based on a signal acquired from a detection device installed in a car.

2. The elevator diagnostic device according to claim 1, wherein the abnormality detection unit detects the occurrence of derailment of the counterweight as an abnormality of the elevator.

3. The elevator diagnostic device according to claim 1, wherein the detection device is any one of a load sensor, an acceleration sensor, a camera, and a microphone.

4. Further, it has a threshold storage unit that holds a threshold for abnormality detection set for the signal acquired from the detection device, and the abnormality detection unit detects the abnormality based on the signal acquired from the detection device and the threshold stored in the threshold storage unit in an operation where the car stops. The elevator diagnostic device according to claim 1.

5. The abnormality detection unit stops the car of the elevator from a running state, and when the fluctuation range of the signal acquired from the detection device in the operation of stopping the car of the elevator exceeds the range of the threshold stored in the threshold storage unit, it is determined that an abnormality has occurred in the elevator. The elevator diagnostic device according to claim 4.

6. The threshold storage unit stores a plurality of thresholds corresponding to the height position at which the car stops. The elevator diagnostic device according to claim 5.

7. Further, when the abnormality detection unit detects an abnormality on the counterweight side, it has a communication unit for notifying the occurrence of the abnormality to a management device that remotely manages the elevator. The elevator diagnostic device according to claim 1.

8. The abnormality detection unit is provided in a management device that remotely manages the operation of the elevator. The elevator diagnostic device according to claim 1.

9. The abnormality detection unit detects an abnormality on the counterweight side as a preprocess for starting an automatic diagnosis for temporary restoration operation of the elevator after an earthquake occurs. The elevator diagnostic device according to claim 1.

10. Further, when the abnormality on the counterweight side is not detected by the abnormality detection unit, it has an automatic diagnosis unit that performs an automatic diagnosis for the temporary restoration operation. The elevator diagnostic device according to claim 9.

11. An elevator diagnostic device having an abnormality detection unit that detects an elevator abnormality based on a signal acquired from a load sensor for detecting the load of a car.

12. An elevator diagnostic method in which an abnormality detection unit detects an abnormality on the counterweight side based on a signal acquired from a detection device installed in a car.

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