Elevator door abnormality detection system and elevator door abnormality detection method

Abstract

To provide an elevator door anomaly detection system that is able to improve the accuracy of the detection of a door anomaly detection device.SOLUTION: The elevator door anomaly detection system includes: an oil feeder installation determination device 5 that determines whether an oil feeder is installed in an elevator door 101 or not; and a door anomaly detection device 4 that detects an occurrence of an anomaly in the elevator door 101, based on a determination result of the oil feeder installation determination device 5 and a value of torque generated in a door motor 102 when the elevator door 101 performs opening / closing operation.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an elevator door abnormality detection system and an elevator door abnormality detection method. [Background technology]

[0002] Conventionally, elevator door abnormality detection systems equipped with door abnormality detection devices are known. The door abnormality detection devices detect abnormalities in elevator doors based on the torque values ​​generated in door motors when elevator doors open and close (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6611874 Summary of the Invention [Problem to be solved by the invention]

[0004] Elevator maintenance and inspection work may include the process of installing a fuel dispenser on the elevator door. When a fuel dispenser is installed on the elevator door, the frictional force generated between the elevator door and the fuel dispenser increases over a certain period of time after the installation. This increase in frictional force between the elevator door and the fuel dispenser increases the torque value generated in the door motor when the elevator door opens and closes.

[0005] However, the configuration of the elevator door abnormality detection system described in Patent Document 1 had a problem in that if the friction force generated between the elevator door and the oil dispenser increased due to the installation of the oil dispenser on the elevator door, the door abnormality detection device could mistakenly detect that an abnormality had occurred in the elevator door.

[0006] The present disclosure has been made to solve the above-mentioned problems, and its purpose is to provide an elevator door abnormality detection system and an elevator door abnormality detection method that can improve the detection accuracy of a door abnormality detection device. [Means for solving the problem]

[0007] The elevator door abnormality detection system according to the present disclosure includes a fuel dispenser installation determination device that determines whether a fuel dispenser is installed on the elevator door, and a door abnormality detection device that detects an abnormality in the elevator door based on the determination result of the fuel dispenser installation determination device and the value of the torque generated in the door motor when the elevator door opens and closes. The elevator door abnormality detection method according to the present disclosure includes a fuel dispenser installation determination step for determining whether or not a fuel dispenser is installed on the elevator door, and a door abnormality detection step for detecting that an abnormality has occurred in the elevator door based on the determination result of the fuel dispenser installation determination step and the value of the torque generated in the door motor when the elevator door opens and closes. [Effects of the Invention]

[0008] According to the elevator door abnormality detection system and elevator door abnormality detection method of the present disclosure, the detection accuracy of the door abnormality detection device can be improved. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a block diagram showing an elevator door abnormality detection system according to a first embodiment. FIG. [Figure 2] 2 is a flowchart showing the operation of the elevator door abnormality detection system of FIG. 1. [Figure 3] FIG. 10 is a block diagram showing an elevator door abnormality detection system according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Embodiment 1 Figure 1 is a block diagram showing an elevator door abnormality detection system according to embodiment 1. The elevator door abnormality detection system includes an elevator 1, a remote monitoring device 2, a diagnostic operation information acquisition device 3, a door abnormality detection device 4, a fuel dispenser installation determination device 5, and a maintenance work information storage device 6.

[0011] The elevator 1 includes an elevator door 101, a door motor 102, and an elevator control panel 103.

[0012] The elevator door 101 includes a car door (not shown) and a landing door (not shown). The car door opens and closes a car entrance (not shown). The landing door opens and closes a landing entrance (not shown). The car door and the landing door open and close in conjunction with each other.

[0013] The car door and the landing door are opened and closed by driving the door motor 102. In other words, the elevator door 101 is opened and closed by driving the door motor 102.

[0014] The elevator control panel 103 controls the driving of the door motor 102. A diagnostic operation command, which will be described later, is input to the elevator control panel 103. When the diagnostic operation command is input to the elevator control panel 103, the elevator control panel 103 performs a diagnostic operation of the elevator.

[0015] The diagnostic operation of the elevator includes an operation for detecting abnormalities in elevator door 101. In the operation for detecting abnormalities in elevator door 101, elevator control panel 103 drives door motor 102 to cause elevator door 101 to open and close. In addition, in the operation for detecting abnormalities in elevator door 101, elevator control panel 103 measures the value of the torque generated in door motor 102 when elevator door 101 opens and closes.

[0016] The torque value of the door motor 102 measured during the diagnostic operation of the elevator is output from the elevator control panel 103 as diagnostic operation information.

[0017] The remote monitoring device 2 is connected to the elevator control panel 103. The diagnostic operation information acquisition device 3 is connected to the elevator control panel 103 via the remote monitoring device 2.

[0018] The diagnostic operation information acquisition device 3 outputs a diagnostic operation command at a preset timing. The diagnostic operation command output from the diagnostic operation information acquisition device 3 is input to the elevator control panel 103 via the remote monitoring device 2.

[0019] The diagnostic operation information output from the elevator control panel 103 is input to the diagnostic operation information acquisition device 3 via the remote monitoring device 2.

[0020] The door abnormality detection device 4 detects that an abnormality has occurred in the elevator door 101. The door abnormality detection device 4 is connected to the diagnostic operation information acquisition device 3. When the door abnormality detection device 4 detects that an abnormality has occurred in the elevator door 101, the door abnormality detection device 4 acquires diagnostic operation information from the diagnostic operation information acquisition device 3. The detection of an abnormality that has occurred in the elevator door 101 by the door abnormality detection device 4 is performed during the diagnostic operation of the elevator.

[0021] Maintenance work information is stored in the maintenance work information storage device 6. The maintenance work information includes information indicating when a fuel dispenser was installed on the elevator door 101. The maintenance work information also includes information indicating when a diagnostic operation of the elevator was performed.

[0022] The fuel dispenser installation determination device 5 determines whether or not a fuel dispenser has been installed on the elevator door 101. The fuel dispenser installation determination device 5 is connected to the maintenance work information storage device 6. When the fuel dispenser installation determination device 5 determines whether or not a fuel dispenser has been installed on the elevator door 101, the fuel dispenser installation determination device 5 acquires maintenance work information from the maintenance work information storage device 6. The determination by the fuel dispenser installation determination device 5 of whether or not a fuel dispenser has been installed is made based on information indicating when the fuel dispenser was installed on the elevator door 101 and information indicating when a diagnostic operation of the elevator was performed.

[0023] Specifically, the period from when the current elevator diagnostic operation was performed to when the previous elevator diagnostic operation was performed is defined as the fuel dispenser installation determination period. The fuel dispenser installation determination period is calculated by the fuel dispenser installation determination device 5 from information indicating when the elevator diagnostic operation was performed. The fuel dispenser installation determination device 5 determines whether a fuel dispenser has been installed based on whether the time when the fuel dispenser was installed on the elevator door 101 was within the fuel dispenser installation determination period.

[0024] The door abnormality detection device 4 is connected to the fuel dispenser installation determination device 5. When the door abnormality detection device 4 detects that an abnormality has occurred in the elevator door 101, the door abnormality detection device 4 obtains the determination result of the fuel dispenser installation determination device 5 from the fuel dispenser installation determination device 5.

[0025] The door abnormality detection device 4 detects that an abnormality has occurred in the elevator door 101 based on the determination result of the fuel dispenser installation determination device 5 and the diagnostic operation information.

[0026] Specifically, the door abnormality detection device 4 detects that an abnormality has occurred in the elevator door 101 based on the judgment result of the fuel dispenser installation judgment device 5 and the value of the torque generated in the door motor 102 when the elevator door 101 opens and closes.

[0027] A first threshold value and a second threshold value greater than the first threshold value are preset in the door abnormality detection device 4. When the fuel dispenser installation determination device 5 determines that no fuel dispenser is installed on the elevator door 101, the door abnormality detection device 4 determines whether or not an abnormality has occurred in the elevator door 101 using the first threshold value and the value of the torque generated in the door motor 102. When the value of the torque generated in the door motor 102 is greater than the first threshold value, the door abnormality detection device 4 determines that an abnormality has occurred in the elevator door 101. When the value of the torque generated in the door motor 102 is equal to or less than the first threshold value, the door abnormality detection device 4 determines that no abnormality has occurred in the elevator door 101.

[0028] On the other hand, when the fuel dispenser installation determination device 5 determines that a fuel dispenser has been installed on the elevator door 101, the door abnormality detection device 4 determines whether or not an abnormality has occurred in the elevator door 101 using the second threshold value and the value of the torque generated in the door motor 102. When the value of the torque generated in the door motor 102 is greater than the second threshold value, the door abnormality detection device 4 determines that an abnormality has occurred in the elevator door 101. When the value of the torque generated in the door motor 102 is equal to or less than the second threshold value, the door abnormality detection device 4 determines that no abnormality has occurred in the elevator door 101.

[0029] Next, the operation of the elevator door abnormality detection system will be described. Figure 2 is a flowchart showing the operation of the elevator door abnormality detection system of Figure 1. First, in step S101, the door abnormality detection device 4 acquires diagnostic operation information from the diagnostic operation information acquisition device 3.

[0030] Thereafter, in step S102, the fuel dispenser installation determination device 5 acquires the maintenance work information from the maintenance work information storage device 6.

[0031] Thereafter, in step S103, the fuel dispenser installation determination device 5 determines whether or not a fuel dispenser has been installed on the elevator door 101 using the maintenance work information.

[0032] In step S103, if the fuel dispenser installation determination device 5 determines that a fuel dispenser is not installed on the elevator door 101, the processing of the elevator door abnormality detection system proceeds to step S104. In step S104, the door abnormality detection device 4 determines whether an abnormality has occurred in the elevator door 101 using the first threshold value and the value of the torque generated in the door motor 102.

[0033] On the other hand, if the fuel dispenser installation determination device 5 determines in step S103 that a fuel dispenser has been installed on the elevator door 101, the processing of the elevator door abnormality detection system proceeds to step S105. In step S105, the door abnormality detection device 4 determines whether or not an abnormality has occurred in the elevator door 101 using the second threshold value and the value of the torque generated in the door motor 102. This ends the flow of the elevator door abnormality detection system.

[0034] As described above, the elevator door abnormality detection system according to the first embodiment includes the fuel dispenser installation determination device 5 and the door abnormality detection device 4. The fuel dispenser installation determination device 5 determines whether or not a fuel dispenser is installed on the elevator door 101. The door abnormality detection device 4 detects that an abnormality has occurred in the elevator door 101 based on the determination result of the fuel dispenser installation determination device 5 and the value of the torque generated in the door motor 102 when the elevator door 101 opens and closes. This configuration can prevent the door abnormality detection device 4 from erroneously detecting that an abnormality has occurred in the elevator door 101 when the frictional force generated between the elevator door 101 and the fuel dispenser increases due to the installation of the fuel dispenser on the elevator door 101. As a result, the detection accuracy of the door abnormality detection device 4 can be improved.

[0035] Furthermore, in the elevator door abnormality detection system according to the first embodiment, the fuel dispenser installation determination device 5 determines whether or not a fuel dispenser has been installed based on information indicating when the fuel dispenser was installed on the elevator door 101. This configuration makes it possible to set a period during which the frictional force generated between the elevator door 101 and the fuel dispenser increases when the fuel dispenser is installed on the elevator door 101. This improves the detection accuracy of the door abnormality detection device 4.

[0036] Furthermore, in the elevator door abnormality detection system according to the first embodiment, the detection of an abnormality occurring in the elevator door 101 by the door abnormality detection device 4 is performed during the diagnostic operation of the elevator 1. The determination of whether or not a fuel dispenser has been installed by the fuel dispenser installation determination device 5 is performed based on whether or not the time when the fuel dispenser is installed on the elevator door 101 is within the fuel dispenser installation period. With this configuration, it is possible to set a period during which the frictional force generated between the elevator door 101 and the fuel dispenser increases when the fuel dispenser is installed on the elevator door 101. This allows the detection accuracy of the door abnormality detection device 4 to be improved.

[0037] Furthermore, in the elevator door abnormality detection system according to the first embodiment, a first threshold value and a second threshold value greater than the first threshold value are preset in the door abnormality detection device 4. When the fuel dispenser installation determination device 5 determines that no fuel dispenser is installed on the elevator door 101, the door abnormality detection device 4 determines whether an abnormality has occurred in the elevator door 101 using the first threshold value and the torque value. On the other hand, when the fuel dispenser installation determination device 5 determines that a fuel dispenser is installed on the elevator door 101, the door abnormality detection device 4 determines whether an abnormality has occurred in the elevator door 101 using the second threshold value and the torque value. This configuration allows the door abnormality detection device 4 to determine whether an abnormality has occurred in the elevator door 101 in response to an increase in frictional force generated between the elevator door 101 and the fuel dispenser due to the installation of the fuel dispenser on the elevator door 101.

[0038] The elevator door abnormality detection system according to the first embodiment also includes a maintenance work information storage device 6. The maintenance work information storage device 6 stores maintenance work information including information indicating when a fuel dispenser was installed on the elevator door 101. The fuel dispenser installation determination device 5 uses the maintenance work information stored in the maintenance work information storage device 6 to determine whether or not a fuel dispenser has been installed on the elevator door 101. With this configuration, information indicating when a fuel dispenser was installed on the elevator door 101 can be automatically input to the fuel dispenser installation determination device 5. As a result, the efficiency of maintenance inspection work to detect when an abnormality has occurred in the elevator door 101 can be improved.

[0039] Moreover, the elevator door abnormality detection method according to the first embodiment includes a fuel dispenser installation determination step and a door abnormality detection step. In the fuel dispenser installation determination step, it is determined whether or not a fuel dispenser is installed on the elevator door 101. In the door abnormality detection step, it is detected that an abnormality has occurred in the elevator door 101 based on the determination result of the fuel dispenser installation determination step and the value of the torque generated in the door motor 102 when the elevator door 101 opens and closes. This configuration can prevent the door abnormality detection device 4 from erroneously detecting that an abnormality has occurred in the elevator door 101 when the frictional force generated between the elevator door 101 and the fuel dispenser increases due to the installation of the fuel dispenser on the elevator door 101. As a result, the detection accuracy of the door abnormality detection device 4 can be improved.

[0040] In the elevator door abnormality detection system according to the first embodiment, the fuel dispenser installation determination period is the period between the current diagnostic operation of the elevator 1 and the previous diagnostic operation of the elevator 1. Furthermore, in the elevator door abnormality detection system according to the first embodiment, the fuel dispenser installation determination device 5 determines whether a fuel dispenser has been installed based on whether the time when the fuel dispenser was installed on the elevator door 101 falls within the fuel dispenser installation determination period. However, this is not limited to this. For example, the fuel dispenser installation determination period may be the period from the time of the determination to a time going back a predetermined period. In other words, the fuel dispenser installation determination device 5 may determine whether a fuel dispenser has been installed based on whether the time when the fuel dispenser was installed on the elevator door 101 falls within the period from the time of the determination to a time going back a predetermined period. Even with this configuration, the detection accuracy of the door abnormality detection device 4 can be improved. In this case, any value may be set as the predetermined period.

[0041] Furthermore, in the elevator door abnormality detection system according to the first embodiment, the door abnormality detection device 4 is configured to determine whether an abnormality has occurred in the elevator door 101 using the first or second threshold and the torque value generated in the door motor 102. As the oil in the oil dispenser becomes accustomed to the elevator door 101, the increase in frictional force generated between the elevator door 101 and the oil dispenser disappears. As the temperature of the oil in the oil dispenser changes, the time it takes for the oil in the oil dispenser to become accustomed to the elevator door 101 changes from the time the oil dispenser is installed. Therefore, the elevator door 101 may be determined to be abnormal by using a third threshold value between the first and second thresholds and the torque value generated in the door motor 102, depending on the installation environment, such as the time when the oil dispenser was installed on the elevator door 101 and the temperature. Alternatively, the period preset in the oil dispenser installation determination device 5 may be adjusted depending on the installation environment, such as the time when the oil dispenser was installed on the elevator door 101 and the temperature.

[0042] Embodiment 2 Figure 3 is a block diagram showing an elevator door abnormality detection system according to embodiment 2. The elevator door abnormality detection system includes an opening / closing count information storage device 7. The opening / closing count information storage device 7 stores information indicating the number of opening and closing operations of the elevator door 101.

[0043] When the door abnormality detection device 4 detects that an abnormality has occurred in the elevator door 101, the door abnormality detection device 4 obtains information indicating the number of opening and closing operations of the elevator door 101 from the opening and closing count information storage device 7. The door abnormality detection device 4 uses the information indicating the number of opening and closing operations of the elevator door 101 and information indicating when the fuel dispenser was installed on the elevator door 101 to calculate the number of opening and closing operations of the elevator door 101 since the fuel dispenser was installed on the elevator door 101.

[0044] As the oil in the oil dispenser becomes accustomed to the elevator door 101, the increase in frictional force occurring between the elevator door 101 and the oil dispenser is eliminated. The time it takes for the oil in the oil dispenser to become accustomed to the elevator door 101 from the time the oil dispenser is installed varies depending on the number of times the elevator door 101 is opened and closed. The door abnormality detection device 4 detects that an abnormality has occurred in the elevator door 101 based on information indicating the number of times the elevator door 101 is opened and closed.

[0045] In other words, the door abnormality detection device 4 detects that an abnormality has occurred in the elevator door 101 based on the judgment result of the fuel dispenser installation judgment device 5, information indicating the number of times the elevator door 101 has opened and closed since the fuel dispenser was installed on the elevator door 101, and the value of the torque generated in the door motor 102 when the elevator door 101 opens and closes.

[0046] Specifically, a fourth threshold value is preset in the door abnormality detection device 4. When the fuel dispenser installation determination device 5 determines that a fuel dispenser is installed on the elevator door 101, and the number of opening and closing operations of the elevator door 101 since the fuel dispenser was installed on the elevator door 101 is greater than the fourth threshold value, the door abnormality detection device 4 determines whether an abnormality has occurred in the elevator door 101 using the first threshold value and the value of the torque generated in the door motor 102.

[0047] When the fuel dispenser installation determination device 5 determines that a fuel dispenser has been installed on the elevator door 101 and the number of opening and closing operations of the elevator door 101 since the fuel dispenser was installed on the elevator door 101 is less than or equal to a fourth threshold value, the door abnormality detection device 4 determines whether an abnormality has occurred in the elevator door 101 using the second threshold value and the value of the torque generated in the door motor 102.

[0048] If the fuel dispenser installation determination device 5 determines that a fuel dispenser is not installed on the elevator door 101, the door abnormality detection device 4 determines whether an abnormality has occurred in the elevator door 101 using a first threshold value and the value of the torque generated in the door motor 102.

[0049] Other configurations of the elevator door abnormality detection system according to the second embodiment are the same as those of the elevator door abnormality detection system according to the first embodiment.

[0050] As described above, the elevator door abnormality detection system according to the second embodiment includes an opening / closing count information storage device 7 that stores information indicating the number of opening and closing operations of the elevator door 101. The door abnormality detection device 4 detects that an abnormality has occurred in the elevator door 101 based on the determination result of the fuel dispenser installation determination device 5, the information indicating the number of opening and closing operations of the elevator door 101, and the value of the torque generated in the door motor 102 when the elevator door 101 opens and closes. This configuration can shorten the period in which the door abnormality detection device 4 determines whether an abnormality has occurred in the elevator door 101 using the second threshold value and the value of the torque generated in the door motor 102. As a result, the detection accuracy of the door abnormality detection device 4 can be improved.

[0051] In the elevator door abnormality detection system according to the second embodiment, the door abnormality detection device 4 is configured to determine whether an abnormality has occurred in the elevator door 101 using the first or second threshold and the torque value generated in the door motor 102. However, this is not limited to this. For example, the elevator door 101 may be configured to determine whether an abnormality has occurred in the elevator door 101 using a third threshold value between the first and second thresholds and the torque value generated in the door motor 102, depending on the number of opening and closing operations of the elevator door 101 since the fuel dispenser was installed on the elevator door 101. In this case, as the number of opening and closing operations of the elevator door 101 increases, the door abnormality detection device 4 sets the third threshold value closer to the first threshold. This configuration can further improve the detection accuracy of the door abnormality detection device 4.

[0052] Furthermore, in the elevator door abnormality detection system according to each embodiment, the elevator control panel 103 and the diagnostic operation information acquisition device 3 are connected to each other via the remote monitoring device 2. However, this is not limiting, and the elevator control panel 103 and the diagnostic operation information acquisition device 3 may be connected to each other without the remote monitoring device 2.

[0053] Although the elevator door abnormality detection system and method according to each preferred embodiment have been described above, the elevator door abnormality detection system and method according to each of the above-described embodiments are not limited to the above-described embodiments. Various modifications and variations can be made to the elevator door abnormality detection system and method according to each of the above-described embodiments without departing from the scope of the claims.

[0054] (Appendix 1) a fuel dispenser installation determination device that determines whether a fuel dispenser is installed at the elevator door; a door abnormality detection device that detects an abnormality in the elevator door based on the determination result of the fuel dispenser installation determination device and the value of the torque generated in the door motor when the elevator door opens or closes; An elevator door abnormality detection system equipped with the system. (Appendix 2) An elevator door abnormality detection system as described in Appendix 1, wherein the fuel dispenser installation determination device determines whether the fuel dispenser has been installed based on information indicating when the fuel dispenser was installed on the elevator door. (Appendix 3) An elevator door abnormality detection system as described in Appendix 2, in which the fuel dispenser installation determination device determines whether the fuel dispenser has been installed based on whether the time the fuel dispenser was installed on the elevator door is within a period between the time of determination and a time a predetermined period back. (Appendix 4) The detection of an abnormality occurring in the elevator door by the door abnormality detection device is performed during a diagnostic operation of the elevator, An elevator door abnormality detection system as described in Appendix 2 or Appendix 3, wherein the fuel dispenser installation determination device determines whether the fuel dispenser has been installed based on whether the time the fuel dispenser was installed on the elevator door is within the period from when the current diagnostic operation of the elevator was performed to when the previous diagnostic operation of the elevator was performed. (Appendix 5) a maintenance work information storage device that stores maintenance work information including information indicating when the fuel dispenser was installed at the elevator door; An elevator door abnormality detection system described in any one of Appendix 2 to Appendix 4, wherein the fuel dispenser installation determination device uses the maintenance work information stored in the maintenance work information storage device to determine whether the fuel dispenser has been installed on the elevator door. (Appendix 6) a first threshold value and a second threshold value greater than the first threshold value are preset in the door abnormality detection device; An elevator door abnormality detection system as described in any one of Supplementary Note 1 to Supplementary Note 5, wherein the door abnormality detection device determines whether or not an abnormality has occurred in the elevator door using the first threshold value and the torque value when the fuel dispenser installation determination device determines that the fuel dispenser is not installed in the elevator door, and determines whether or not an abnormality has occurred in the elevator door using the second threshold value and the torque value when the fuel dispenser installation determination device determines that the fuel dispenser is installed in the elevator door. (Appendix 7) an opening / closing frequency information storage device that stores information indicating the number of opening and closing operations of the elevator door; An elevator door abnormality detection system as described in any one of Supplementary Note 1 to Supplementary Note 6, wherein the door abnormality detection device detects that an abnormality has occurred in the elevator door based on the judgment result of the fuel dispenser installation judgment device, information indicating the number of opening and closing operations of the elevator door, and the value of the torque generated in the door motor when the elevator door opens and closes. (Appendix 8) a fuel dispenser installation determination step for determining whether a fuel dispenser is installed at the elevator door; a door abnormality detection step of detecting an abnormality in the elevator door based on the determination result of the fuel dispenser installation determination step and the value of the torque generated in the door motor when the elevator door opens and closes; The elevator door abnormality detection method is provided. [Explanation of symbols]

[0055] 1 elevator, 2 remote monitoring device, 3 diagnostic operation information acquisition device, 4 door abnormality detection device, 5 fuel dispenser installation determination device, 6 maintenance work information storage device, 7 opening and closing count information storage device, 101 elevator door, 102 door motor, 103 elevator control panel.

Claims

1. a fuel dispenser installation determination device that determines whether a fuel dispenser is installed at the elevator door; a door abnormality detection device that detects an abnormality in the elevator door based on the determination result of the fuel dispenser installation determination device and the value of the torque generated in the door motor when the elevator door opens or closes; An elevator door abnormality detection system equipped with the system.

2. The elevator door abnormality detection system according to claim 1, wherein the fuel dispenser installation determination device determines whether the fuel dispenser is installed based on information indicating when the fuel dispenser was installed on the elevator door.

3. The elevator door abnormality detection system described in claim 2, wherein the fuel dispenser installation determination device determines whether the fuel dispenser has been installed based on whether the time the fuel dispenser was installed on the elevator door is within a period between the time of determination and a time a predetermined period back.

4. The detection of an abnormality occurring in the elevator door by the door abnormality detection device is performed during a diagnostic operation of the elevator, An elevator door abnormality detection system as described in claim 2 or claim 3, wherein the fuel dispenser installation determination device determines whether the fuel dispenser has been installed based on whether the time the fuel dispenser was installed on the elevator door is within the period from when the current diagnostic operation of the elevator was performed to when the previous diagnostic operation of the elevator was performed.

5. a maintenance work information storage device that stores maintenance work information including information indicating when the fuel dispenser was installed at the elevator door; An elevator door abnormality detection system as described in claim 2 or claim 3, wherein the fuel dispenser installation determination device determines whether the fuel dispenser has been installed on the elevator door using the maintenance work information stored in the maintenance work information storage device.

6. a first threshold value and a second threshold value greater than the first threshold value are preset in the door abnormality detection device; The elevator door abnormality detection system of claim 1 or claim 2, wherein the door abnormality detection device determines whether an abnormality has occurred in the elevator door using the first threshold value and the torque value when the fuel dispenser installation determination device determines that the fuel dispenser is not installed in the elevator door, and determines whether an abnormality has occurred in the elevator door using the second threshold value and the torque value when the fuel dispenser installation determination device determines that the fuel dispenser is installed in the elevator door.

7. an opening / closing frequency information storage device that stores information indicating the number of opening and closing operations of the elevator door; 3. The elevator door abnormality detection system according to claim 1, wherein the door abnormality detection device detects that an abnormality has occurred in the elevator door based on the judgment result of the fuel dispenser installation judgment device, information indicating the number of times the elevator door has opened and closed, and the value of the torque generated in the door motor when the elevator door opens and closes.

8. a fuel dispenser installation determination step for determining whether a fuel dispenser is installed at the elevator door; a door abnormality detection step of detecting an abnormality in the elevator door based on the determination result of the fuel dispenser installation determination step and the value of the torque generated in the door motor when the elevator door opens and closes; The elevator door abnormality detection method is provided.

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