Elevator monitoring device, elevator monitoring method, and elevator monitoring system

Abstract

To provide an elevator monitoring device, an elevator monitoring method, and an elevator monitoring system capable of detecting a failure of erroneously detecting an open state of a door after detection of a closed state of the door by a gate switch.SOLUTION: This elevator monitoring device for detecting an abnormality of a gate switch 11 for detecting an open / closed state of a door of an elevator 10 comprises: a communication unit 31 with an elevator control device, configured to communicate a detection result of the gate switch 11; and an abnormality diagnosis unit 32 that detects the abnormality of the gate switch 11 when the door changes from the closed state to the opened state during a stop of the elevator before a door opening command is output.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an elevator monitoring device, an elevator monitoring method, and an elevator monitoring system, and more particularly to an elevator monitoring device that detects an abnormality in a gate switch that is provided in an elevator and detects the open / closed state of the elevator door. [Background technology]

[0002] Conventionally, elevators have been known that have gate switches that detect whether the doors are open or closed. In this case, the elevator cannot start running unless the gate switch detects that the doors are closed.

[0003] Patent Document 1 describes an elevator comprising a car door and a landing door that open and close an elevator entrance, a gate switch that is provided on the edge of the entrance and is arranged immediately before the closing end of the car door and is operated by the closing of the car door, a door closing switch that is arranged closer to the closing end than the gate switch and is operated by the engagement of the car door and detects a position where the door closing drive force of the car door is reduced, a lock switch that is provided on the edge of the entrance and is operated when the landing door is closed, and a lock switch that is provided on the edge of the entrance and is operated when the car door and landing door are closed and the gate switch is not operated and the lock switch is not operated. The document describes an elevator door device comprising: first control means for issuing an output after a predetermined time period when the gate switch is operated and the door closing switch is operated; second control means for closing the car doors and landing doors and, when the gate switch is not operated and the door closing switch is not operated, issuing an output after a predetermined time period after the start of the door closing operation; a first alarm that is energized by the output of the first control means to notify of an abnormality in the gate switch; and a second alarm that is energized by the output of the second control means to notify of an inability to close at least the car doors. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 3-177296 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional technology detects a gate switch failure when the gate switch cannot detect that the door is closed, but it cannot detect a failure that causes the gate switch to mistakenly detect that the door is open after detecting that the door is closed due to dirty gate switch contacts, etc. An object of the present invention is to provide an elevator monitoring device, an elevator monitoring method, and an elevator monitoring system that can detect a malfunction in which a gate switch erroneously detects that a door is in an open state after detecting that the door is in a closed state. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides an elevator monitoring device that detects an abnormality in a gate switch that detects the open / closed state of an elevator door, the elevator monitoring device comprising: a detection result acquisition unit that acquires the detection results of the gate switch; and an abnormality diagnosis unit that detects an abnormality in the gate switch when the door changes from a closed state to an open state based on the detection results while the elevator is stopped and before a door open command is output. In this case, an elevator monitoring device can be provided that can detect a failure in the gate switch that erroneously detects that the door is in an open state after detecting that the door is in a closed state.

[0007] For example, when the abnormality diagnosis unit detects an abnormality in a gate switch, it instructs the elevator in which the abnormality in the gate switch is detected to run at a slower speed than usual. In this case, even if an impact occurs due to an emergency stop, the impact can be mitigated and the safety of passengers can be ensured. Furthermore, for example, a notification unit may be provided that notifies the control center when the abnormality diagnosis unit detects an abnormality in the gate switch, so that a security guard can be instructed to perform maintenance on the gate switch. Furthermore, for example, a gate switch outputs an ON signal when the door is closed, and in this case, the door closed state can be detected as an ON state. Furthermore, for example, when the elevator is running and the door changes from a closed state to an open state based on the detection result before the door open command is output, the abnormality diagnosis unit issues an instruction to stop the elevator, thereby ensuring the safety of elevator passengers.

[0008] The present invention also provides an elevator monitoring method for detecting an abnormality in a gate switch that detects the open / closed state of an elevator door, which acquires the detection result of the gate switch and detects the abnormality in the gate switch when the door changes from a closed state to an open state based on the detection result while the elevator is stopped and before a door open command is output. In this case, an elevator monitoring method can be provided that can detect a failure in which the gate switch erroneously detects that the door is in an open state after detecting that the door is in a closed state.

[0009] Furthermore, the present invention provides an elevator monitoring system comprising an elevator having a gate switch that detects the open / closed state of the door, and an elevator monitoring device that monitors the operating state of the elevator, the elevator monitoring device comprising a detection result acquisition unit that acquires the detection results of the gate switch, and an abnormality diagnosis unit that detects an abnormality in the gate switch when the door changes from a closed state to an open state based on the detection results while the elevator is stopped and before a door open command is output. In this case, an elevator monitoring system can be provided that can detect a fault in the gate switch that erroneously detects that the door is in an open state after detecting that the door is in a closed state. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide an elevator monitoring device, an elevator monitoring method, and an elevator monitoring system that can detect a failure in which a gate switch erroneously detects that a door is in an open state after detecting that the door is in a closed state. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a block diagram showing a functional configuration of an elevator monitoring system according to an embodiment of the present invention. [Figure 2] 4 is a flowchart illustrating the operation of the elevator remote monitoring device. [Figure 3] FIG. 3 is a diagram showing various elevator signals used in FIG. 2. [Figure 4] FIG. 1 is a diagram illustrating a conventional method for detecting an abnormality in a gate switch. [Figure 5] FIG. 10 is a diagram showing a work instruction screen for instructing an elevator maintenance worker to perform maintenance on a gate switch. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. <Overall explanation of elevator monitoring system 1> FIG. 1 is a block diagram showing the functional configuration of an elevator monitoring system 1 according to this embodiment. 1 shows only the functional configuration related to this embodiment among the various functions of the elevator monitoring system 1. As shown in the figure, the elevator monitoring system 1 includes an elevator 10, an elevator control device 20, an elevator remote monitoring device 30, a control center 40, and a public line 50.

[0013] The elevator 10 is a device for vertical movement within a building such as a building, and it allows passengers to board a car provided in the elevator 10 and transports the passengers between predetermined floors. As shown in the figure, the elevator 10 of this embodiment has a gate switch 11. The gate switch 11 detects the open / closed state of the doors of the elevator 10. That is, it detects whether the doors of the elevator 10 are open or closed. This prevents the elevator car 10 from operating when the doors of the elevator 10 are open, ensuring the safety of passengers. The gate switch 11 outputs an ON signal when the doors are closed. Conversely, it outputs an OFF signal when the doors are open. This door is, for example, a hall-side door provided on each floor, but it may also be a car-side door. Although one elevator 10 is shown in FIG. 1, there may be a plurality of elevators.

[0014] The elevator control device 20 controls the operation of the elevator 10. In this case, the elevator control device 20 controls the operation of the elevator car of the elevator 10 and controls customer calls. More specifically, when a customer calls, the elevator control device 20 moves the car to the floor where the call is made. When a customer presses a destination floor button on the car 200, the elevator control device 20 registers the destination floor and moves the car to the destination floor. Furthermore, the elevator control device 20 controls the turning on and off of an indicator light that displays the customer's destination floor inside the car. The elevator control device 20 also controls the opening and closing of the doors. In other words, when the car arrives at a floor where a customer calls or a destination floor, the elevator control device 20 issues a door open command and controls the doors to open. When passengers have finished boarding or alighting, the elevator control device 20 issues a door close command and controls the doors to close.

[0015] The elevator remote monitoring device 30 is an example of an elevator monitoring device that monitors the operating state of the elevator 10. The elevator remote monitoring device 30 monitors the operating state of the elevator 10 to detect an abnormality in the gate switch 11. The illustrated elevator remote monitoring device 30 includes an elevator control device communication unit 31, an abnormality diagnosis unit 32, and a control center communication unit 33.

[0016] The elevator control device communication unit 31 is an example of a detection result acquisition unit, and communicates with the elevator control device 20 to receive various signals from the elevator 10 and transmit diagnostic operation commands. In this embodiment, the elevator control device communication unit 31 acquires the detection result of the gate switch 11 from the elevator 10 via the elevator control device 20. In this case, the elevator control device communication unit 31 acquires an ON signal from the gate switch 11 when the door is open, and an OFF signal when the door is closed.

[0017] The abnormality diagnosis unit 32 diagnoses the various signal states of the elevator 10 to detect the presence or absence of an abnormality. In this embodiment, it detects the presence or absence of an abnormality in the gate switch 11. As will be described in detail later, the abnormality diagnosis unit 32 detects an abnormality in the gate switch 11 when the door changes from a closed state to an open state based on the detection result while the elevator 10 is stopped and before a door open command is output.

[0018] The control center communication unit 33 is an example of a notification unit, which communicates with the control center 40 and notifies the control center 40 when the abnormality diagnosis unit 32 detects an abnormality in the elevator 10. In this embodiment, the control center communication unit 33 notifies the control center 40 via the public line 50 when the abnormality diagnosis unit 32 detects an abnormality in the gate switch 11.

[0019] The control center 40 monitors and understands the status of the elevator 10 for which it has a maintenance contract. In this embodiment, when the control center 40 receives a notification from the control center communication unit 33 that an abnormality in the gate switch 11 has been detected, the control center 40 instructs the maintenance person for the elevator 10 to perform maintenance on the gate switch 11.

[0020] The public line 50 may be a wired communication line such as an optical communication line or a public telephone line. It may also be a wireless communication line such as a mobile phone line or Wi-Fi (Wireless Fidelity, registered trademark). The internet may also be used in combination.

[0021] <Explanation of Operation of Elevator Remote Monitoring Device 30> Fig. 2 is a flowchart illustrating the operation of the elevator remote monitoring device 30. Fig. 3 is a diagram showing various signals of the elevator 10 used in Fig. 2. FIG. 3 shows a running signal indicating whether the elevator 10 is running, a door open command which is a command to open the doors, a door close command which is a command to close the doors, and a GS (gate switch) signal which is a signal from the gate switch 11. The horizontal axis in FIG. 3 represents time. These signals are ON when indicated by thick lines, and OFF when indicated by thin lines. That is, when the running signal is ON, it indicates that the elevator 10 is running, and when it is OFF, it indicates that the elevator 10 is stopped. Furthermore, when the door open command is ON, it indicates that a door open command has been issued, and when it is OFF, it indicates that a door open command has not been issued. Furthermore, when the door close command is ON, it indicates that a door close command has been issued, and when it is OFF, it indicates that a door close command has not been issued. When the GS signal is ON, it indicates that the doors are closed, and when it is OFF, it indicates that the doors are open.

[0022] The operation of the elevator remote monitoring device 30 will be described below with reference to FIGS. First, the abnormality diagnosis unit 32 determines whether the elevator is running or not from the running signal (S100). As a result, if the elevator 10 is not running (No in S100), that is, if the elevator 10 is stopped, the abnormality diagnosis unit 32 determines whether or not the door open command is on (S101). If the door open command is not ON, that is, if the door open command has not been issued (No in S101), the abnormality diagnosis unit 32 then determines whether the GS signal is ON (S102). If the GS signal is ON, that is, if the door is closed (Yes in S102), the abnormality diagnosis unit 32 then determines whether or not the door open command is ON (S103). If the door open command is not ON, that is, if the door open command has not been issued (No in S103), the abnormality diagnosis unit 32 then determines whether or not a travel signal has been detected (S104). If the running signal is not detected, that is, if the elevator is stopped (No in S104), the abnormality diagnosis unit 32 then determines whether the GS signal has been turned off (S105). Then, when the GS signal is turned off (Yes in S105), the abnormality diagnosis unit 32 detects an abnormality in the gate switch 11, and the control center communication unit 33 notifies the control center 40 that an abnormality in the gate switch 11 has been detected (S106).

[0023] If the answer is Yes in S100, S101, S103, or S104, the process returns to S100. Also, if the answer is No in S102, the process returns to S100. Furthermore, if the answer is No in S105, the process returns to S103.

[0024] In this case, at time t1 in FIG. 3, the running signal is off as shown in FIG. 3, so the elevator 10 is not running but is stopped (No in S100). Also, since the door open command is OFF, the door open command has not been issued (No in S101). Furthermore, since the GS signal is on, the door is closed (Yes in S102). After that, at time t2 in FIG. 3, the door open command is OFF, so the door open command has not yet been issued (No in S103). Also, since the running signal is off, the elevator 10 is stopped (No in S104). On the other hand, the GS signal is off (Yes in S105), which means that the door is erroneously detected as having changed from a closed state to an open state. In this case, the abnormality diagnosis unit 32 detects an abnormality in the gate switch 11 (S106).

[0025] This means that the abnormality diagnosis unit 32 detects an abnormality in the gate switch 11 when the door changes from a closed state to an open state based on the detection results while the elevator 10 is stopped and before a door open command is output. In this case, the gate switch 11 detects a door open state even though there is no door open command, which is not actually a state. Therefore, in this case, the abnormality diagnosis unit 32 determines that an abnormality has occurred in the gate switch 11. In reality, the GS signal often turns off instantaneously in S105, as shown in Fig. 3. In other words, if the GS signal turns off due to factors such as dirty contacts of the gate switch 11, the GS signal often turns off instantaneously. Note that the abnormality diagnosis unit 32 monitors the gate switch 11 for abnormalities from the time t1 when the GS signal turns on until the door open command is turned on at time t3.

[0026] On the other hand, if the door changes from a closed state to an open state based on the detection results while the elevator 10 is running before a door-open command is output, the abnormality diagnosis unit 32 issues an instruction to stop the elevator 10. If the door opens while the elevator 10 is running, the abnormality diagnosis unit 32 controls the elevator to make an emergency stop at the nearest floor because there is a risk of endangering passenger safety. Furthermore, when the abnormality diagnosis unit 32 detects an abnormality in the gate switch 11 using the method described above, it instructs the elevator 10 that detected the abnormality in the gate switch 11 to run at a slower speed than normal. If an abnormality in the gate switch 11 occurs due to contact contamination or the like, the GS signal may be instantly turned off while the elevator 10 is running, as described above. In this case, the elevator 10 makes an emergency stop, which could cause an impact if the elevator 10 were running at a normal speed. Running the elevator 10 at a slower speed can reduce the occurrence of this impact. As a result, even if an impact occurs due to an emergency stop, the impact can be mitigated, ensuring passenger safety.

[0027] FIG. 4 is a diagram showing a conventional method for detecting an abnormality in the gate switch 11. In FIG. Conventionally, a state in which the GS signal does not turn on after a door close command is issued is detected. In this case, it is not possible to detect a fault in which the gate switch 11 erroneously detects that the door is open after detecting that the door is closed due to dirty contacts of the gate switch 11, etc. In contrast, this embodiment, as described in FIG. 3, can detect such a fault.

[0028] <Explanation of the processing of the control center 40> FIG. 5 is a diagram showing a work instruction screen for instructing the maintenance worker of the elevator 10 to perform maintenance on the gate switch 11. This screen is displayed on a mobile terminal carried by the maintenance technician. The mobile terminal is a computer device such as a smartphone, tablet, mobile phone, or mobile computer. The work instruction screen shown in the figure consists of customer information, details detected by the remote monitoring system, and inspection instruction items. The customer information includes the customer number and information about the elevator 10 in which an abnormality occurred in the gate switch 11. The details detected by the remote monitoring system are the details of the abnormality detected, and in this case, it shows that dirt was detected at the gate switch contacts on 10 / 17. The inspection instruction items are the details of the inspection instructions, and in this case, it shows that an instruction has been given to polish the gate switch contacts.

[0029] In the above embodiment, the gate switch 11 outputs an ON signal when the door is closed and outputs an OFF signal when the door is open, but this is not limited to this. That is, the gate switch 11 may output an OFF signal when the door is closed and an OFF signal when the door is closed.

[0030] <Explanation of elevator monitoring method> The processes performed by the elevator remote monitoring device 30 are realized by the cooperation of software and hardware resources. That is, a processor such as a CPU provided in the elevator remote monitoring device 30 loads into a main memory and executes a program that realizes each function of the elevator remote monitoring device 30, thereby realizing each function. Therefore, the processing performed by the above-described elevator remote monitoring device 30 can be considered to be an elevator monitoring method for detecting an abnormality in a gate switch that detects the open / closed state of an elevator door, which acquires the detection result of the gate switch and detects an abnormality in the gate switch when the door changes from a closed state to an open state based on the detection result while the elevator is stopped and before a door open command is output. This makes it possible to provide an elevator monitoring method that can detect a failure in which the gate switch erroneously detects that the door is open after detecting that the door is closed.

[0031] Although the present embodiment has been described above, the technical scope of the present invention is not limited to the scope of the above embodiment. It is clear from the claims that various modifications and improvements to the above embodiment are also included in the technical scope of the present invention. [Explanation of symbols]

[0032] 1... elevator monitoring system, 10... elevator, 11... gate switch, 20... elevator control device, 30... elevator remote monitoring device, 31... elevator control device communication unit, 32... abnormality diagnosis unit, 33... control center communication unit, 40... control center

Claims

1. An elevator monitoring device that detects an abnormality in a gate switch that detects the open / close state of an elevator door, a detection result acquisition unit that acquires a detection result of the gate switch; an abnormality diagnosis unit that detects an abnormality in the gate switch when the door changes from a closed state to an open state based on the detection result while the elevator is stopped and before a door open command is output; An elevator monitoring device comprising:

2. 2. The elevator monitoring device according to claim 1, wherein, when the abnormality diagnosis unit detects an abnormality in the gate switch, the abnormality diagnosis unit instructs the elevator in which the abnormality in the gate switch is detected to travel at a speed slower than normal.

3. 2. The elevator monitoring device according to claim 1, further comprising a notification unit that notifies a control center when the abnormality diagnosis unit detects an abnormality in the gate switch.

4. 2. The elevator monitoring device according to claim 1, wherein the gate switch outputs an ON signal when the door is closed.

5. 2. The elevator monitoring device according to claim 1, wherein the abnormality diagnosis unit issues an instruction to stop the elevator when the door changes from a closed state to an open state based on the detection result while the elevator is running and before a command to open the door is output.

6. An elevator monitoring method for detecting an abnormality in a gate switch that detects the open / closed state of an elevator door, comprising: Obtaining the detection result of the gate switch; an abnormality in the gate switch is detected when the door changes from a closed state to an open state based on the detection result while the elevator is stopped and before a door open command is output; Elevator monitoring method.

7. an elevator having a gate switch that detects whether the door is open or closed; an elevator monitoring device that monitors the operating status of the elevator; Equipped with The elevator monitoring device a detection result acquisition unit that acquires a detection result of the gate switch; an abnormality diagnosis unit that detects an abnormality in the gate switch when the door changes from a closed state to an open state based on the detection result while the elevator is stopped and before a door open command is output; An elevator monitoring system comprising:

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