JP2019210086A - Elevator abnormality monitoring system and elevator abnormality monitoring method - Google Patents

Abstract

To detect an abnormality after door closing without using an elevator control signal.SOLUTION: An elevator abnormality monitoring system 100 installed in an elevator 1 is configured such that a diagnosis device 12 determines that a car 2 is stopped when a three-axis acceleration sensor 11 does not detect acceleration in the moving direction of a car 2 for over a prescribed period of time, and determines that a car door 3 is closing when the three-axis acceleration sensor 11 detects acceleration in the door closing direction of the car door 3. The diagnosis device 12 (abnormality diagnosis unit 14) determines that the car door 3 is abnormal when it is determined that car door 3 is closing while it is determined that the car door 2 is stopped.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an elevator abnormality monitoring system and an elevator abnormality monitoring method, and is suitable for application to an elevator abnormality monitoring system and an elevator abnormality monitoring method for detecting an abnormality in an elevator door opening / closing device.

  Conventionally, in a general elevator, operation status confirmation and abnormality diagnosis are performed using a control signal acquired from an elevator control device. However, in recent years, if the control signal is different for each elevator, integrated operation is not easy, and control information cannot be obtained (used) during elevator maintenance. Diagnosis techniques have been proposed.

  For example, Patent Document 1 discloses a door that detects a door abnormality by measuring and diagnosing vibration when the elevator door is opened / closed from a sensor signal of an acceleration sensor installed externally on the door of the elevator, and identifies the abnormal part. An anomaly detection device is disclosed.

JP, 2006-222438, A

  However, although the door abnormality detection device of Patent Document 1 described above enables abnormality diagnosis without using an elevator control signal, the period in which the abnormality can be detected is limited to when the door is opened and closed. There was a problem that it was not suitable for detecting abnormalities. Specifically, for example, a state where a foreign object is caught in the closed end portion of a closed door cannot be detected as an abnormality, and there is no choice but to find and deal with it by regular maintenance or the like. Although details will be described in the embodiment of the present invention, if a foreign object is caught in the closed end portion of the door, the door open state may be easily detected due to vibration during traveling, etc. There was also a risk that the emergency stop would lead to the confinement of users.

  The present invention has been made in view of the above points, and intends to propose an elevator abnormality monitoring system and an elevator abnormality monitoring method capable of detecting an abnormality after the door is closed without using an elevator control signal.

  In order to solve this problem, in the present invention, a first acceleration sensor that detects acceleration in the moving direction of the car, a second acceleration sensor that detects acceleration in the opening and closing direction of the car door, and the first acceleration. A car monitoring unit for detecting movement of the car based on detection information by the sensor; a door monitoring unit for detecting opening / closing of the car door based on detection information by the second acceleration sensor; and an abnormality in the car door An elevator abnormality monitoring system including an abnormality diagnosis unit that detects In this elevator abnormality monitoring system, the car monitoring unit determines that the car is stopped when the first acceleration sensor does not detect acceleration for a predetermined time, and the door monitoring unit Determines that the car door is closing when the second acceleration sensor detects an acceleration in the door closing direction, and the abnormality diagnosing unit detects the car by the car monitoring unit. When it is determined that the car is stopped, if the door monitoring unit determines that the car door is closing the door, it is determined that the car door is abnormal.

  Moreover, in order to solve this problem, the present invention provides the following elevator abnormality monitoring method using an elevator abnormality monitoring system installed in an elevator. Here, the elevator abnormality monitoring system includes a first acceleration sensor that detects acceleration in a moving direction of a car, a second acceleration sensor that detects acceleration in an opening / closing direction of a car door, and the first acceleration sensor. A car monitoring unit that detects the movement of the car based on the detection information by the vehicle, a door monitoring unit that detects the opening and closing of the car door based on the detection information by the second acceleration sensor, and an abnormality of the car door. And an abnormality diagnosis unit to detect. In the elevator abnormality monitoring method, the car monitoring unit determines that the car is stopped when the first acceleration sensor does not detect acceleration for a predetermined time. A second step in which the door monitoring unit determines that the car door is closing when the second acceleration sensor detects an acceleration in a door closing direction; and the abnormality diagnosis. When it is determined that the car door is closing in the second step when the car is determined in the first step to stop the car, And a third step of determining that the car door is abnormal.

  According to the present invention, it is possible to detect an abnormality after the door is closed without using an elevator control signal.

It is a figure which shows the structural example of the elevator in which the elevator abnormality monitoring system which concerns on one embodiment of this invention was installed. It is a figure which shows the structural example of a car door and a door opening / closing apparatus. It is a figure for demonstrating the car door abnormality which may occur when a door closes. It is a flowchart which shows the example of a process sequence of the abnormality diagnosis process in this Embodiment.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration example of an elevator in which an elevator abnormality monitoring system according to an embodiment of the present invention is installed. FIG. 1 shows an elevator 1 having a general rope-type elevator configuration as an example of an elevator in which the elevator abnormality monitoring system 100 according to the present embodiment can be installed. The elevator abnormality monitoring system 100 according to the present embodiment can be installed in other types of elevators (for example, hydraulic elevators).

  First, the configuration of the elevator 1 will be described.

  The car 2 is a car on which passengers and luggage are placed in the elevator 1. The car 2 is connected to the main rope 8 and is suspended. When the hoisting machine 5 winds (or lowers) the main rope 8, the car 2 moves in the hoistway in the vertical direction.

  The car door 3 is a door attached to the car 2, and is a left and right door panel that can be opened and closed horizontally (right car door panel 21 and left car door panel 22 shown in FIG. 2). The door opening / closing device 4 is a device that controls the opening / closing of the car door 3. The car door 3 and the door opening / closing device 4 will be described in detail later with reference to FIG.

  The hoisting machine 5 is a device that winds up (or lowers) the main rope 8 in accordance with an instruction from the control device 10. The counterweight 6 is a weight provided to reduce a burden when the car 2 is raised and lowered, and is connected to the main rope 8. The pulley 7 is a pulley provided to avoid contact between the car 2 and the counterweight 6, and the main rope 8 is hung on the pulley 7. The main rope 8 is a rope that connects the car 2 and the counterweight 6.

  The landing door 9 is a door provided at the entrance of each floor of the elevator 1 and opens and closes in synchronization with the opening and closing of the car door 3. The control device 10 is a device that controls the operation of the elevator. For example, the control device 10 instructs the door opening / closing device 4, the hoisting machine 5, the landing door 9, and the like to operate.

  Next, the configuration of the elevator abnormality monitoring system 100 will be described. The elevator abnormality monitoring system 100 includes a three-axis acceleration sensor 11 and a diagnostic device 12.

  The triaxial acceleration sensor 11 is a sensor that can measure accelerations in three directions of the XYZ axes, and is installed in the car door 3 (more specifically, either the right car door panel 21 or the left car door panel 22). The

  Here, the triaxial acceleration sensor 11 is installed in the car door 3 to detect and measure the acceleration in the opening / closing direction (horizontal direction (for example, the X axis direction)) when the car door 3 is opened and closed. Can do. Since the car door 3 is attached to the car 2, the 3-axis acceleration sensor 11 detects the acceleration in the moving direction (vertical direction (for example, Y-axis direction)) when the car 2 is moved. Can be measured.

  The measurement result of the acceleration by the triaxial acceleration sensor 11 is sent to the diagnostic device 12 by wire or wireless, and is converted into a speed and a distance by the measurement value analysis unit 13 of the diagnostic device 12.

  In the elevator abnormality monitoring system 100, another acceleration sensor such as a combination of acceleration sensors capable of measuring acceleration in one direction may be used instead of the three-axis acceleration sensor 11. However, even in such a case, at least acceleration in the moving direction (vertical direction (Y-axis direction)) in the car 2 and acceleration in the moving direction (horizontal direction (X-axis direction)) in the car door 3 can be detected. It is required to be.

  The diagnostic device 12 is a device for diagnosing the operation state of the elevator 1 based on the measurement value (acceleration) by the three-axis acceleration sensor 11. Although the installation place of the diagnostic apparatus 12 is not specifically limited, For example, it installs in the machine room (not shown) of the elevator 1.

  The diagnostic device 12 includes a measurement value analysis unit 13 that converts a measurement value obtained by the three-axis acceleration sensor 11 into a speed and a distance, and movement of the car 2 and opening / closing of the car door 3 based on the conversion result obtained by the measurement value analysis unit 13. , And an external communication unit for notifying the outside (for example, the control center) of the abnormality of the elevator 1 when the diagnosis result by the abnormality diagnosis unit 14 is abnormal. 15. Details of the processing by the diagnostic device 12 will be described later with reference to FIG.

  FIG. 2 is a diagram illustrating a configuration example of a car door and a door opening / closing device.

  As described above, the right car door panel 21 and the left car door panel 22 correspond to the car door 3. The right car door panel 21 and the left car door panel 22 (hereinafter also referred to as “both door panels”) are doors that open and close in conjunction with the left and right direction (horizontal direction). The state of contact is called “door closed state”.

  As shown in FIG. 2, the door opening / closing device 4 includes a door rail 23, a door machine 24, a door driving belt 25, a door pulley 26, and a door closing detection switch 27.

  The door rail 23 is a rail on which both door panels move. The door machine 24 is a device that operates both door panels. The door driving belt 25 is a belt connected to both door panels, and is driven by the door machine 24. The door pulley 26 is a pulley for assisting the operation of the door driving belt 25.

  In this description, the state in which the driving force by the door machine 24 is applied in the opening direction of both door panels is called “door opening operation”, and the state in which the driving force by the door machine 24 is applied in the closing direction of both door panels. This is called “door closing operation”.

  The door close detection switch 27 is a switch for detecting the open / closed state of the car door 3, and is installed, for example, at the door closed end (or the vicinity thereof) of either the right car door panel 21 or the left car door panel 22. The door close detection switch 27 is turned on when the car door 3 is in the door closed state, and is turned off when the door closed state is released. In the present embodiment, the installation location of the door close detection switch 27 is not particularly limited. For example, as shown in FIG. 2, the door close detection switch 27 is installed above the door closed end portion of the right car door panel 21. Also good.

  In the present embodiment, the elevator 1 has a door until a state in which there is no travel command by a landing call button or a car call button (both not shown) (hereinafter referred to as “no call waiting state”) continues for a predetermined time. In the state after the door closing operation is performed by the machine 24 and the no-call waiting state continues for a predetermined time (hereinafter referred to as “no call dormant state”), the door closing operation is released. This predetermined duration is referred to as a “no call waiting time period”. That is, according to the function, even after the door is closed, in the no-call waiting state until the no-call waiting time elapses, a force in the closing direction is applied to the car door 3 by the door closing operation. This door closing operation is canceled in the call-free suspension state after the call-free waiting time has elapsed. The no-call suspension state is canceled when a travel command is received from the landing call button or the car call button or when the car door 3 is opened.

  Furthermore, in the function related to the door closing operation described above, the elevator 1 is configured such that when the car door 3 (the right car door panel 21 and the left car door panel 22) is opened for some reason in the call-free pause state when the door is closed, Control is performed to return the door to the closed state by performing the door closing operation.

  FIG. 3 is a diagram for explaining a car door abnormality that may occur when the door is closed. In the elevator abnormality monitoring system 100 according to the present embodiment, the diagnostic device 12 detects a state in which the foreign object 28 is sandwiched between the closed ends of the car door 3 as an abnormality in the car door. This car door abnormality will be described with reference to FIG.

  FIG. 3 (A) shows a state in which the door closing operation continues with the foreign object 28 sandwiched between the door closed ends of the car door 3 (the right car door panel 21 and the left car door panel 22) in the no-call waiting state. ing. Since the door machine 24 performs the door closing operation even when the foreign object 28 is sandwiched between the door closed end portions, as shown in FIG. 3A, the right car door panel 21 and the left car door panel 22 include the door closed end portion. The upper part of the door is closed, and the lower part of the door closed end part is opened by the amount of the foreign matter 28, so that the whole is inclined. In the case of FIG. 3A, the door closing detection switch 27 is turned ON (door closed state) when the upper portion of the door closed end closes (contacts or sufficiently closes).

  FIG. 3 (B) shows a state in which the door closing operation is released while the foreign object 28 is sandwiched between the door closed ends of the car door 3 in the no-call pause state, following FIG. 3 (A). When the door closing operation by the door machine 24 is canceled, the right car door panel 21 and the left car door panel 22 are tilted as shown in FIG. Is resolved. As a result, a gap corresponding to the foreign matter 28 sandwiched between the door closed end portions is created, and the door close detection switch 27 is turned off (door open state).

  After that, in the elevator 1, the door machine 24 performs the door closing operation again in order to close the car door 3 because the door is in the open state in FIG. Back to). As described above, when the foreign object 28 is caught in the door closed end portion of the car door 3, the state shown in FIG. 3A and FIG. Vibrates by repeating small opening and closing operations. In addition, in a state where the foreign object 28 is caught in the door closed end portion of the car door 3, the ON / OFF detection of the door close detection switch 27 is likely to change due to a slight movement of the elevator 1 (vibration during traveling, etc.).

  Therefore, when the car door abnormality occurs with the foreign object 28 sandwiched between the closed ends of the car door 3, the door close detection switch 27 may be turned off while the elevator 1 is traveling. At this time, as in the case of a general elevator, when the door open state is determined during traveling, the control device 10 makes the elevator 1 emergency stop, so that confinement occurs when the user is on the vehicle. End up.

  Therefore, in the elevator abnormality monitoring system 100 according to the present embodiment, after the door is closed (more specifically, the call-free suspension state), the diagnostic device 12 executes an abnormality diagnosis process described below, thereby causing the car door abnormality. Is detected.

  FIG. 4 is a flowchart showing an example of the processing procedure of the abnormality diagnosis process in the present embodiment. With reference to FIG. 4, the process in which the diagnostic device 12 detects an abnormality (car door abnormality) after the door is closed will be described in detail.

  In the abnormality diagnosis process shown in FIG. 4, the measurement value analysis unit 13 of the diagnostic device 12 executes a process of converting acceleration into speed and distance as needed based on the acceleration measurement value by the triaxial acceleration sensor 11. Suppose that Specifically, for example, when acceleration in the horizontal left direction is measured by the three-axis acceleration sensor 11 (see FIG. 2) installed on the right car door panel 21, the conversion processing by the measurement value analysis unit 13 is performed. The opening / closing speed and moving distance in the closing direction of the right car door panel 21 can be obtained. Further, for example, when the acceleration in the vertical direction is measured by the three-axis acceleration sensor 11 (see FIG. 2) installed on the right car door panel 21, the car 2 is converted by the measurement value analysis unit 13. Thus, the moving speed and moving distance in the upward direction can be obtained.

  First, in step S101, the abnormality diagnosis unit 14 of the diagnostic device 12 determines whether or not the vertical speed (that is, the moving speed of the car 2) is less than the threshold A with respect to the conversion result by the measurement value analysis unit 13. judge. The threshold A is a predetermined threshold for detecting a state where the car 2 is not traveling (a state where the car 2 is stopped). For example, the threshold A is a minimum value of the steady traveling speed of the elevator 1 (for example, 15 [m / min ") is set.

  If it is determined in step S101 that the moving speed of the car 2 is less than the threshold value A (YES in step S101), this means that the car 2 is not running (stopped), and at this time, the step Proceed to S102. On the other hand, if it is determined in step S101 that the moving speed of the car 2 is greater than or equal to the threshold A (NO in step S101), it means that the car 2 is traveling, and the process proceeds to step S103.

  In step S <b> 102, the abnormality diagnosis unit 14 determines whether or not the continuous time in which the vertical speed is less than the threshold A (that is, the stop duration of the car 2) is equal to or greater than the threshold B. The threshold B corresponds to the above-described call waiting standby time, and a predetermined time is set in advance.

  When it is determined in step S102 that the stop duration of the car 2 is equal to or greater than the threshold value B (YES in step S102), this means that the call is suspended, and the process proceeds to step S104. On the other hand, if it is determined in step S102 that the stop duration of the car 2 is less than the threshold B (NO in step S102), this means that the call is not in a dormant state, and the process proceeds to step S103.

  Step S103 is executed when the car 2 is traveling (NO in step S101) or is not in a no-call pause state (NO in step S102). In step S103, the abnormality diagnosis unit 14 initializes (the number of operations of the door close detection switch 27) (zero clear). The “number of times the door close detection switch 27 is operated” is a counter value indicating the number of times the door close detection switch 27 detects the door closed state (ON number), and is temporarily stored in the diagnostic device 12. After the process of step S103, the process returns to step S101 again.

  On the other hand, the processing after step S104 is executed when the car 2 is stopped (YES in step S101) and is in a no-call pause state (YES in step S102).

  In step S104, the abnormality diagnosis unit 14 determines whether or not there is a horizontal speed (that is, the opening / closing speed of the car door 3) for the conversion result by the measurement value analysis unit 13. If it is determined in step S104 that the car door 3 has an opening / closing speed (YES in step S104), the process proceeds to step S105, and if it is determined that the car door 3 has no opening / closing speed (NO in step S104), The process returns to step S104.

  In step S105, the abnormality diagnosis unit 14 determines whether or not the speed detection time in the same direction is less than the threshold C for the horizontal speed determined in step S104 (the opening / closing speed of the car door 3). The threshold value C is for distinguishing between a normal door opening / closing operation associated with a door opening / closing operation by a user and a door opening / closing operation due to an abnormality, for example, for the normal door opening / closing operation. When the time is about 3 seconds, the threshold C is set to a shorter time (for example, 1 second).

  If it is determined in step S105 that the speed detection time in the same direction is less than the threshold value C (YES in step S105), it indicates that the car door 3 is performing a short opening or closing operation, There is a possibility of vibration due to an abnormal car door as described with reference to FIG. 3 instead of the normal opening / closing operation. In this case, the process proceeds to step S106. On the other hand, if it is determined in step S105 that the speed detection time in the same direction is equal to or greater than the threshold value C (NO in step S105), it is determined that this is a normal opening / closing operation associated with the door opening / closing operation by the user. Since there is not, it returns to step S101.

  In step S106, the abnormality diagnosis unit 14 increments the number of operations of the door close detection switch 27 by one, and proceeds to step S107.

  In step S107, the abnormality diagnosis unit 14 determines whether or not the number of operations of the door close detection switch 27 is equal to or greater than the threshold value D. The threshold value D is for excluding the ON / OFF phenomenon of the door closing detection switch 27 due to sudden vibration from among opening / closing operations that may cause vibration due to car door abnormality. In the case of a car door abnormality due to foreign matter being caught, it is assumed that the door opening and closing (vibration) is repeated for a short time unless the foreign matter is removed. For example, if it is determined that there is an abnormality when a short-time door opening / closing (vibration) occurs 20 times or more, the threshold value D is “20”.

  If it is determined in step S107 that the number of operations of the door close detection switch 27 is greater than or equal to the threshold value D (YES in step S107), an abnormality of the car door 3 (car door abnormality) is diagnosed and the process proceeds to step S108. On the other hand, if it is determined in step S107 that the number of operations of the door close detection switch 27 is less than the threshold D (NO in step S107), the number of operations of the door close detection switch 27 is taken over and the process returns to step S104.

  In the flowchart shown in FIG. 4, if an abnormality is not diagnosed, the processing from step S104 to step S107 is repeated. As a condition for ending the repetition, for example, the abnormality diagnosing unit 14 is accelerated by the measurement value analyzing unit 13 If it is determined that the vertical speed (the moving speed of the car 2) is equal to or higher than the threshold value A from the conversion result, the process may return to step S101.

  In step S108, based on the fact that the abnormality diagnosis unit 14 has diagnosed the car door abnormality, the external communication unit 15 notifies the external control center (not shown) of the occurrence of the abnormality in the elevator 1.

  In step S108, it is preferable that the external communication unit 15 does not simply notify the occurrence of an abnormality, but transmits information indicating the content of the abnormality based on the diagnosis result by the abnormality diagnosis unit 14. Specifically, for example, as information indicating that there is a possibility that the car door 3 may not be completely closed due to the presence of foreign matter at the closed end portion of the car door 3, error information such as “chatting of the door close detection switch” is included. You may make it transmit. In this case, the control center that has received the chattering error information of the door close detection switch can eliminate the cause of the abnormality (removal of the foreign matter 28) by instructing the service staff performing maintenance to confirm the site.

  As described above, by performing the abnormality diagnosis process shown in FIG. 4, the elevator abnormality monitoring system 100 according to the present embodiment does not use the control signal of the elevator 1 and closes the door of the car door 3 (particularly, the car door). 3), it is possible to detect and report an abnormality in the no-call pause state after the door closing operation 3 is completed. More specifically, it is possible to detect an abnormality in the car door that occurs when the foreign object 28 is caught in the closed end portion of the car door 3 where the door closing operation has been performed, and to notify the external control center.

  Then, according to the elevator abnormality monitoring system 100 according to the present embodiment, since the service staff can quickly remove the foreign matter 28 causing the abnormality by detecting the car door abnormality, the car door abnormality Can be left unattended. As a result, it is possible to prevent a situation in which the door close detection switch 27 is turned off during traveling and the elevator is stopped in an emergency, and it can be expected to prevent the user from being trapped.

  In addition, this invention is not limited to above-described embodiment, Various modifications are included. The above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to the one having all the configurations described. In addition, it is possible to add, delete, and replace another configuration for a part of the configuration of an embodiment.

DESCRIPTION OF SYMBOLS 1 Elevator 2 Car 3 Car door 4 Door opening and closing device 5 Hoisting machine 6 Balance weight 7 Pulley 8 Main rope 9 Landing door 10 Control device 11 Triaxial acceleration sensor 12 Diagnosis device 13 Measurement value analysis part 14 Abnormality diagnosis part 15 External communication Section 21 Right car door panel 22 Left car door panel 23 Door rail 24 Door machine 25 Door drive belt 26 Door pulley 27 Door close detection switch 28 Foreign object 100 Elevator abnormality monitoring system

Claims (5)

A first acceleration sensor for detecting acceleration in a moving direction of the car;
A second acceleration sensor for detecting acceleration in the opening / closing direction of the car door;
A car monitoring unit that detects the movement of the car based on information detected by the first acceleration sensor;
A door monitoring unit that detects opening and closing of the car door based on detection information by the second acceleration sensor;
An abnormality diagnosis unit for detecting an abnormality of the car door;
With
The car monitoring unit determines that the car is stopped when the first acceleration sensor does not detect acceleration for a predetermined time,
The door monitoring unit determines that the car door is performing a door closing operation when the second acceleration sensor detects an acceleration in a door closing direction,
The abnormality diagnosis unit, when the car monitoring unit determines that the car is stopped, and when the door monitoring unit determines that the car door is closing the door, An elevator abnormality monitoring system characterized by determining that the car door is abnormal. When the abnormality diagnosis unit determines that the car door is abnormal, information indicating that the car door may not be completely closed due to the presence of a foreign object at the closed end of the car door is provided outside. The elevator abnormality monitoring system according to claim 1, further comprising: an abnormality transmission unit that transmits to an installed control center. The door monitoring unit counts the number of times the car door is closed based on detection information from the second acceleration sensor,
The abnormality diagnosis unit, when it is determined by the car monitoring unit that the car is stopped, when the number of times the car door is closed counted by the door monitoring unit reaches a predetermined number of times, The elevator abnormality monitoring system according to claim 1, wherein it is determined that the car door is abnormal. The said door monitoring part counts the frequency | count of closing of the said car door once, when the detection time of the acceleration of the same direction by the said 2nd acceleration sensor continues in less than predetermined time. The elevator abnormality monitoring system described. An elevator abnormality monitoring method using an elevator abnormality monitoring system installed in an elevator,
The elevator abnormality monitoring system is
A first acceleration sensor for detecting acceleration in a moving direction of the car;
A second acceleration sensor for detecting acceleration in the opening / closing direction of the car door;
A car monitoring unit that detects the movement of the car based on information detected by the first acceleration sensor;
A door monitoring unit that detects opening and closing of the car door based on detection information by the second acceleration sensor;
An abnormality diagnosis unit for detecting an abnormality of the car door;
Have
A first step in which the car monitoring unit determines that the car is stopped when the first acceleration sensor does not detect acceleration for a predetermined time;
A second step in which the door monitoring unit determines that the car door is performing a door closing operation when the second acceleration sensor detects an acceleration in a door closing direction;
When it is determined that the car door is closing the door in the second step when the abnormality diagnosis unit determines that the car is stopped in the first step And a third step of determining that the car door is abnormal,
An elevator abnormality monitoring method comprising:

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