JP2023076848A - Elevator monitoring device, elevator monitoring method, and elevator remote monitoring system - Google Patents

Abstract

To provide an elevator monitoring device capable of detecting, without using any elevator control signal, a failure occurrence when an elevator is stopped.SOLUTION: An elevator monitoring device comprises: an acceleration sensor attached to a car door of an elevator; and a failure diagnostic device to detect a failure in the elevator based on a signal from the acceleration sensor. The failure diagnostic device is configured to notify an outside that the failure has occurred in the elevator when detecting the nullification of door closing force for the car door based on the signal from the acceleration sensor.SELECTED DRAWING: Figure 1

Description

The present invention relates to an elevator monitoring device, an elevator monitoring method, and an elevator remote monitoring system.

As a device for remotely monitoring the operational status of an elevator, there is a technique disclosed in Patent Document 1 below. In this patent document 1, "When it is determined that the car 2 is stopped by the three-axis acceleration sensor 11 (installed on the car door 3), it is determined that the car door 3 is closing the door. When it is determined, it is determined that the car door 3 is abnormal.” By this, it is described that “the foreign matter 28 is detected at the closed end of the car door 3 where the door closing operation is performed without using the control signal of the elevator. It is possible to detect car door abnormalities that occur when a car is caught and notify the external control center.”

JP 2019-210086 A

By the way, elevator failure occurs even when the car door is closed and the elevator is stopped, such as when the car departs. However, in the conventional technology described above, although the car door abnormality can be detected when the elevator is stopped, the occurrence of other failures cannot be detected.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an elevator monitoring device, an elevator monitoring method, and an elevator remote monitoring system that are capable of detecting the occurrence of a failure when an elevator is stopped without using elevator control signals. and

In order to solve the above problems, for example, the configurations described in the claims are adopted.
The present application includes a plurality of means for solving the above problems. To give one example, an acceleration sensor attached to a car door of an elevator and detecting a failure of the elevator based on a signal from the acceleration sensor and a fault diagnostic device, wherein the fault diagnostic device detects that the door closing force for the car door is invalid based on the signal from the acceleration sensor, the elevator malfunctions. It is an elevator monitoring device that notifies the outside of what has happened.

According to the present invention, it is possible to provide an elevator monitoring device, an elevator monitoring method, and an elevator remote monitoring system that are capable of detecting the occurrence of a failure while the elevator is stopped without using an elevator control signal. can.
Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

1 is an overall configuration diagram of an overall configuration of an elevator remote monitoring system according to an embodiment; FIG. FIG. 2 is a diagram (part 1) for explaining the configurations of a car door and a door opening/closing device; FIG. 2 is a diagram (part 2) for explaining the configurations of the car door and the door opening/closing device; It is a flow chart explaining an elevator monitoring method concerning an embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of an elevator monitoring device, an elevator monitoring method, and an elevator remote monitoring system according to the present invention will be described in detail with reference to the drawings. In the embodiments described below, first, the overall configuration of the elevator remote monitoring system including the elevator monitoring device will be described, and then the elevator monitoring method using the elevator monitoring device will be described.

≪Elevator monitoring system≫
FIG. 1 is an overall configuration diagram of the overall configuration of an elevator remote monitoring system 100 according to an embodiment. The elevator remote monitoring system 100 shown in this figure has an elevator 1 , an elevator monitoring device 2 and a management device 3 . In FIG. 1, one elevator 1 equipped with the elevator monitoring device 2 and one management device 3 are shown. may be provided. The structures of the elevator 1, the elevator monitoring device 2, and the management device 3 will be described in this order.

<Elevator 1>
The elevator 1 includes a car 10 , a car door 11 attached to the car 10 , a door opening/closing device 12 for opening and closing the car door 11 , and a hoist 13 for raising and lowering the car 10 . The elevator 1 also includes a counterweight 14 for reducing the load when the car 10 is raised and lowered, a pulley 15 for avoiding contact between the car 10 and the counterweight 14, and a main rope 16 connecting the car 10 and the counterweight 14. Prepare. The main rope 16 connects the riding cage 10 and the counterweight 14 at both ends, and the intermediate part is wound around the hoisting machine 13 and stretched over the pulley 15 . Furthermore, the elevator 1 comprises a control device 17 .

Among the configurations of the elevator 1 described above, configurations of the car door 11, the door opening/closing device 12, and the control device 17, which are particularly important in this embodiment, will be described below.

[Car Door 11 and Door Opening/Closing Device 12]
2 and 3 are diagrams (part 1) and (part 2) for explaining the configurations of the car door 11 and the door opening/closing device 12. FIG.

The car door 11 has a sliding door structure, and is a double sliding door structure having two panel-shaped car doors 11 as illustrated as an example. An elastic cushioning material 11a is provided at the edge where the two car doors 11 meet to absorb the impact when the car doors 11 come together. It is also assumed that one of the two car doors 11 is provided with an acceleration sensor 21 of the elevator monitoring device 2, which will be described later.

The door operator 12 has a pair of door machines 12a for driving the car door 11. As shown in FIG. One of the pair of door machines 12a is a driving roller and the other is a driven roller. An endless drive belt 12b is wound around these roller-shaped door machines 12a. The car doors 11 are engaged with the driving belt 12b at the portions where the driving belt 12b moves in the opposite direction. As a result, the car door 11 is freely opened and closed following the rotation of the drive belt 12b by the door machine 12a. Further, the door opening/closing device 12 includes a door rail 12c for supporting the upper portion of the car door 11 and assisting the movement of the car door 11. As shown in FIG.

[Control device 17]
Returning to FIG. 1 , the control device 17 controls the operation of the elevator 1 . Such a control device 17 is configured by a computer. A computer is hardware used as a so-called computer, and includes a CPU (Central Processing Unit), a RAM (Random Access Memory), and a non-volatile storage unit such as a ROM (Read Only Memory) and an HDD (hard disk drive). , and optionally a network interface. The control device 17 configured by a computer has an operation control section 17a that executes each function according to a program stored in the computer, and a failure detection section 17b. The operation control of the elevator executed by each functional unit of the control device 17 will be described below.

- Elevator operation control by control device 17 -
The operation control unit 17 a of the control device 17 controls the running of the car 10 by the hoisting machine 13 and the opening/closing operation of the car door 11 by the door opening/closing device 12 . The operation control unit 17a controls the door machine 12a (see FIG. 2) of the door opening/closing device 12 so that the passenger in the car 10 does not open the car door 11 while the car 10 is running. continues to apply a force (door closing force 11f) in the direction of closing the door. As a result, the cushioning materials 11a at the edges of the car door 11 are crushed together.

The failure detection unit 17b of the control device 17 receives a control signal for the elevator from the operation control unit 17a, and diagnoses the operating state of the elevator based on the received control signal and the failure diagnosis program stored in the computer. When failure detection is detected as a result of the diagnosis, the failure detection unit 17b transmits a failure detection signal related to the detected failure to the operation control unit 17a.

When the operation control unit 17a receives a failure detection signal from the failure detection unit 17b, the operation control unit 17a stops the door opening/closing device 12 in a state in which the car 10 stops traveling, and the door machine 12a (see FIG. 2) is nullified. Since the door closing force 11f is nullified, as shown in FIG. 3, the car door 11 is pushed back in the door opening direction by the elasticity of the cushioning material 11a. As a result, the car door 11 is slightly opened.

In addition, the operation control unit 17a reduces power consumption when a state in which the car door 11 is closed and the elevator 1 is not operated (waiting without a call) continues for a predetermined period of time. Therefore, the door closing force 11f is nullified. This also causes the car door 11 to open slightly. In this case, the predetermined time until the door closing force 11f is invalidated is set to the first specified value [Tth1]. This first specified value [Tth1] is a value for distinguishing between a no-call waiting state and a fault occurrence state, as will be described later in the elevator monitoring method.

<Elevator monitoring device 2>
Returning to FIG. 1 again, the elevator monitoring device 2 includes an acceleration sensor 21 installed on the car door 11 and a fault diagnosis device 22 .

[Acceleration sensor 21]
The acceleration sensor 21 is installed on the car door 11 and detects the acceleration of the car door 11 in the opening/closing direction. A measurement result of acceleration by the acceleration sensor 21 is sent to the failure diagnosis device 22 by wire or wirelessly.

[Failure Diagnosis Device 22]
The fault diagnosis device 22 diagnoses the occurrence of faults in the elevator 1 based on the signal from the acceleration sensor 21 . Such a fault diagnosis device 22 is composed of a computer, and is installed, for example, on the upper part of the car 10 or installed in the machine room (not shown) of the elevator 1 where the control device 17 is arranged. It is not limited to these. The computer constituting the failure diagnosis device 22 is hardware used as a so-called computer as described above, and includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory) and a HDD (hard disk drive). disk drive), and a network interface.

The failure diagnosis device 22 configured by a computer includes functional units including a sensor signal acquisition unit 22a, a failure determination unit 22b, and a communication unit 22c, which perform respective functions according to programs stored in the computer. Each of these functional units is as follows.

The sensor signal acquisition unit 22a acquires the output signal of the acceleration sensor 21 and converts the acquired signal into information for determining the occurrence of failure.

The failure determination unit 22b determines whether a failure has occurred in the elevator 1 based on the information from the sensor signal acquisition unit 22a. The procedure for judging the occurrence of a failure by the failure judging section 22b will be described in detail in the following elevator monitoring method.

The communication unit 22c notifies the external management device 3 of the failure state when the failure determination unit 22b detects the occurrence of failure.

<Management Device 3>
The management device 3 is a device for remotely managing the elevator 1, and based on the information from the fault diagnosis device 22 of the elevator monitoring device 2 installed in the elevator 1, the maintenance worker of the elevator 1 is notified of the malfunction. is provided with a notification unit for notifying the occurrence of Such a management device 3 is arranged, for example, in the control center of the elevator 1, and manages a plurality of elevators 1 in an integrated manner. Each of the plurality of elevators 1 is installed with the elevator monitoring device 2, but the control device 17 of each elevator 1 may use different hardware or communication protocol.

≪Elevator monitoring method≫
FIG. 4 is a flowchart for explaining the elevator monitoring method according to the embodiment. It shows the procedure for detection. Failures that occur in such a state include, for example, loss of power due to a power failure, failure to release the brakes just before departure of the passenger car 10, and failure to depart.

The procedure shown in this flow chart is a control procedure performed by the fault diagnosis device 22 in the elevator monitoring device 2 . Hereinafter, the elevator monitoring method of the embodiment will be described in order along the flowchart of FIG. 4 while referring to FIGS. 1 to 3 above. Note that these flows are periodically repeated.

<Step S101>
In step S101, the failure determination unit 22b of the failure diagnosis device 22 determines whether or not the closing operation of the car door 11 has been detected. The failure determination unit 22b makes this determination based on the signal of the acceleration sensor 21 received by the sensor signal acquisition unit 22a. If , repeat the judgment.

<Step S102>
In step S102, the failure determination unit 22b determines whether the door closing operation of the car door 11 has been completed, that is, whether the car door 11 has completely closed and stopped moving. The failure determination unit 22b performs this determination based on the signal of the acceleration sensor 21 received by the sensor signal acquisition unit 22a, and when it is determined that the completion of the door closing operation is detected (YES), the process proceeds to step S103. Otherwise, repeat the judgment.

<Step S103>
In step S103, the failure determination unit 22b starts measuring the door closed duration time [Tc]. The door closing duration time [Tc] is the duration time during which the door closing operation of the car door 11 is completed and the car door 11 is in a completely closed state. This is the time during which the door closing force 11f is continuously applied to the door 11. FIG. Note that, based on the signal of the acceleration sensor 21 received by the sensor signal acquisition unit 22a, the failure determination unit 22b detects the completion of the closing operation of the car door 11, that is, the end of the operation of the car door 11. Start measuring the door closed continuation time [Tc].

<Step S104>
In step S104, the failure determination unit 22b determines whether or not the operation speed of the door closing operation has been decelerated in the final stage immediately before detecting the end of the door closing operation of the car door 11 or not. Since the deceleration operation was confirmed, it was determined that the door closing operation of the car door 11 was performed under normal control, and it was confirmed that no failure had occurred until the door closing operation. be. The door closing operation of the car door 11 performed by normal control is the door closing operation of the car door 11 performed at each landing floor during normal operation of the elevator 1, and the operation control unit 17a of the elevator 1 It is assumed that the operation is controlled by

On the other hand, when the completion of the door closing operation of the car door 11 is detected in a state where the deceleration operation of the operation speed of the door closing operation is not confirmed, it is determined that the door closing operation is not performed by normal control.

The failure determination unit 22b performs this determination based on the signal of the acceleration sensor 21 received by the sensor signal acquisition unit 22a, and if it determines that the operation speed of the door closing operation has decelerated (YES), step S105. proceed to Otherwise, the measurement started in step S103 is stopped and the process returns to step S101.

<Step S105>
In step S105, the failure determination unit 22b determines whether or not the door opening operation of the car door 11 has been detected. The failure determination unit 22b makes this determination based on the signal of the acceleration sensor 21 received by the sensor signal acquisition unit 22a. If , repeat the judgment.

<Step S106>
In step S106, the failure determination unit 22b stops measuring the door closed duration time [Tc]. At the same time, the failure determination unit 22b starts measuring the door opening operation time [Tom]. Here, the door opening operation time [Tom] is the time during which the car door 11 performs the opening operation, and is the time during which the car door 11 continues to open.

<Step S107>
In step S107, the failure determination unit 22b determines whether or not the door closed duration time [Tc] measured between steps S103 to S106 is less than the first specified value [Tth1]. This first specified value [Tth1] is a predetermined time until the door closing force 11f is invalidated in order to suppress power consumption in the no-call waiting state, as described in the elevator operation control by the control device 17. be.

When the failure determination unit 22b determines that the door closed duration time [Tc] is less than the first specified value [Tth1] (YES), the process proceeds to step S108. In this case, the door opening operation detected in step S105 is not an operation generated by invalidating the door closing force 11f in the waiting state without a call, but there is a possibility that the door closing force 11f is invalidated due to a failure. The process proceeds to the next step S108.

On the other hand, when the failure determining unit 22b determines that the door closing duration time [Tc] is not less than the first specified value [Tth1] (NO), the door opening operation detected in step S105 is the no-call waiting time. The processing is terminated as an action generated by invalidating the door closing force 11f in the state.

<Step S108>
In step S108, the failure determination unit 22b determines whether or not the stop of the door opening operation of the car door 11 has been detected. The failure determination unit 22b performs this determination based on the signal of the acceleration sensor 21 received by the sensor signal acquisition unit 22a, and when it is determined that the door opening operation of the car door 11 has stopped (YES), the process proceeds to step S109. Proceed, otherwise repeat the decision.

<Step S109>
In step S109, the failure determination unit 22b stops measuring the door opening operation time [Tom], and proceeds to step S110.

<Step S110>
In step S110, the failure determination unit 22b determines whether or not the door opening operation time [Tom] measured between steps S106 to S109 is less than the second specified value [Tth2]. This second specified value [Tth2] is a preset time. The second specified value [Tth2] is a time sufficiently shorter than the time until the car door 11 in the closed state is fully opened, and when the door closing force 11f is nullified, the car door 11 in the closed state is , including the time required for the door to be fully opened by being pushed back in the opening direction by the elasticity of the cushioning material 11a.

When the failure determination unit 22b determines that the door opening operation time [Tom] is less than the second specified value [Tth2] (YES), the process proceeds to step S110. In this case, it is assumed that the door opening operation detected in step S110 is due to the invalidation of the door closing force 11f, and the process proceeds to the next step S111.

On the other hand, when the failure determination unit 22b determines that the door opening operation time [Tom] is not less than the second specified value [Tth2] (NO), the door opening operation detected in step S105 is the door opening operation during normal operation. The processing is terminated assuming that the operation is an opening operation and not an operation due to the invalidation of the door closing force 11f.

<Step S111>
In step S111, the failure determination unit 22b determines whether the operation of the car door 11 has stopped. When the failure determination unit 22b determines that the operation of the car door 11 has stopped (YES), the process proceeds to step S112.

On the other hand, when it is determined that the operation of the car door 11 has not stopped (NO), the failure determination unit 22b determines that the door is reversed due to a foreign object being caught during the door opening operation in step S105. , terminate the process.

<Step S112>
In step S112, the failure determination unit 22b determines that the door closing force 11f is invalidated due to the occurrence of failure in the door opening operation of step S105, and instructs the communication unit 22c to report the occurrence of failure. As a result, the communication unit 22c notifies the management device 3 installed in the control center of the occurrence of a failure in the elevator 1 while the elevator 1 is stopped, and terminates the process. Here, the state that the elevator 1 is stopped means that the car 10 is stopped and the car door 11 is closed by normal operation control.

<<Effects of the embodiment>>
According to the embodiment described above, when a failure occurs in the elevator 1 while the car 10 is stopped, the signal from the acceleration sensor 21 provided on the car door 11 is detected without using the elevator control signal. It is possible to detect the occurrence of a failure based on This makes it possible to integrally manage a plurality of elevators 1 that are controlled using different hardware and communication protocols.

In addition, the present invention is not limited to the above-described embodiments and modifications, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

DESCRIPTION OF SYMBOLS 1... Elevator 2... Elevator monitoring device 3... Management device 11... Car door 10f... Door closing force 17... Control device (elevator)
21 Acceleration sensor 22 Fault diagnosis device 100 Elevator remote monitoring system [Tc] Door closing duration [Tom] Door opening operation time [Tth1] First specified value [Tth2] Second specified value

Claims (7)

An elevator monitoring device comprising an acceleration sensor attached to a car door of an elevator and a fault diagnosis device for detecting a failure of the elevator based on a signal from the acceleration sensor,
The failure diagnosis device
An elevator monitoring device that reports to the outside that a failure has occurred in the elevator when it is detected that the door closing force on the car door is invalid based on the signal from the acceleration sensor. The elevator monitoring device according to claim 1, wherein the acceleration sensor is attached to the car door so as to detect acceleration in the opening/closing direction of the car door. 2. The failure diagnosis device determines that a failure has occurred in the elevator when the door opening operation time when the car door opens is less than a specified value, based on the signal from the acceleration sensor. 2. The elevator monitoring device according to 2. The failure diagnosis device detects invalidation of door closing force on the car door after determining that the car door is normally closed under the control of the elevator control device based on the signal from the acceleration sensor. 4. The elevator monitoring device according to any one of claims 1 to 3. The failure diagnosis device determines that the door closing duration after the car door is normally closed by control is until the door closing force on the car door is invalidated when the elevator is not operated. 5. The elevator monitoring device according to any one of claims 1 to 4, wherein the detection of invalidation of the door closing force to the car door is performed when the time is less than a specified value set as the time of. In an elevator monitoring method for detecting a failure of the elevator based on a signal from an acceleration sensor provided on the car door of the elevator,
An elevator monitoring method, wherein when a fault diagnosis device detects that a door closing force to the car door is invalid based on a signal from the acceleration sensor, the elevator is notified to the outside that a fault has occurred in the elevator. an elevator monitoring device according to any one of claims 1 to 5;
an elevator remote monitoring system, comprising: a management device having a reporting unit that reports the occurrence of a failure when receiving a report of the occurrence of a failure from the failure diagnosis device of the elevator monitoring device.

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