WO2019077645A1

WO2019077645A1 - Device and method for controlling elevator

Info

Publication number: WO2019077645A1
Application number: PCT/JP2017/037355
Authority: WO
Inventors: 大樹福井
Original assignee: 三菱電機株式会社
Priority date: 2017-10-16
Filing date: 2017-10-16
Publication date: 2019-04-25

Abstract

Provided is a control device for controlling an elevator installed in a building that has a seismic isolated structure, wherein after an earthquake, a body of the control device implements an auto-recovery operation to determine the presence/absence of abnormality in the elevator while keeping the elevator cage in motion. The control device body also makes a change to criteria for determining the presence/absence of abnormality in the auto-recovery operation in accordance with the magnitude of a horizontal residual displacement remaining, after an earthquake, between a lower hoistway that is lower than a seismic isolation layer and an upper hoistway that is higher than the seismic isolation layer.

Description

Control device and control method for elevator

The present invention relates to a control device and control method of an elevator provided in a building having a seismic isolation structure.

In a conventional elevator control device, when a P wave detection signal of an earthquake is input to the control panel, the presence or absence of a seismic isolation structure of the elevator is determined. If the elevator does not have a seismic isolation structure, the control board performs a normal automatic recovery operation. On the other hand, when the elevator has a seismic isolation structure, automatic recovery operation simpler than normal automatic recovery operation is performed (see, for example, Patent Document 1).

JP, 2009-12931, A

In the conventional elevator control device as described above, since the method of automatic restoration operation is merely switched depending on the presence or absence of the seismic isolation structure, an earthquake occurs in a building having the seismic isolation structure, and residual displacement unique to the seismic isolation structure If it occurs in the seismic isolation layer, it is not possible to make an appropriate diagnosis considering residual displacement. For this reason, even when the change of the elevator due to the influence of the residual displacement is relatively small, the data obtained by the automatic restoration operation may be determined as abnormal.

The present invention has been made to solve the problems as described above, and it is an object of the present invention to provide an elevator control device and control method capable of more appropriately diagnosing the state of the elevator after an earthquake occurs. .

An elevator control device according to the present invention is a control device for controlling an elevator provided in a seismic isolation structure, and performs an automatic recovery operation to determine the presence or absence of an elevator abnormality while moving a car after an earthquake Control unit body, the control unit body has a magnitude of residual horizontal displacement occurring between the lower hoistway below the seismic isolation layer and the upper hoistway above the seismic isolation layer after the earthquake. In accordance with the above, the determination criteria of the presence or absence of abnormality in the automatic restoration operation are changed.
An elevator control method according to the present invention is a control method for controlling an elevator provided in a seismic isolation structure, and performs an automatic recovery operation to determine the presence or absence of an elevator abnormality while moving a car after an earthquake. During the recovery operation depending on the magnitude of the residual displacement in the horizontal direction between the lower shaft below the seismic isolation layer and the upper shaft above the seismic isolation layer. Change the judgment criteria for the presence or absence.

According to the elevator control device and control method of the present invention, it is determined whether or not there is an abnormality in the automatic recovery operation according to the magnitude of the residual displacement in the horizontal direction occurring between the lower shaft and the upper shaft after the earthquake. By changing the criteria, it is possible to diagnose the state of the elevator more appropriately after the occurrence of an earthquake.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general | schematic block diagram which shows the elevator by Embodiment 1 of this invention. It is a block diagram which shows the principal part of the elevator of FIG. It is a graph which shows an example of the winding machine electric current value at the time of the normal memorize | stored in the reference | standard memory | storage part of FIG. 2, and an example of the threshold value set by the threshold value switching part based on it. It is a graph which shows an example of a hoisting machine electric current value when residual displacement has arisen after an earthquake, and the threshold value of FIG. It is a graph which shows an example of the threshold value set when residual displacement arises after an earthquake, and an example of winding machine current value.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1
FIG. 1 is a schematic block diagram showing an elevator according to Embodiment 1 of the present invention. In FIG. 1, a seismic isolation layer 1 a is provided at an intermediate portion in the height direction of the seismic isolation structure building 1. Further, the seismic isolation structure 1 includes a base portion 2, a seismic isolation portion 3, and a seismic isolation device 4. The base portion 2 is a portion below the seismic isolation layer 1 a of the seismic isolation structure 1. The seismic isolation portion 3 is a portion above the seismic isolation layer 1 a of the seismic isolation structure 1.

The seismic isolation device 4 is provided between the base portion 2 and the seismic isolation portion 3, that is, in the seismic isolation layer 1 a. Moreover, the seismic isolation apparatus 4 has a some seismic isolation rubber, for example.

A hoistway 5 is provided in the seismic isolation structure 1. The hoistway 5 is provided across the base portion 2 and the seismic isolation portion 3. Thus, the hoistway 5 has a lower hoistway 5 a provided in the base portion 2 and an upper hoistway 5 b provided in the seismic isolation portion 3. The lower hoistway 5a is provided below the seismic isolation layer 1a. The upper hoistway 5b is provided above the seismic isolation layer 1a.

An interlayer displacement sensor 6 is provided between the base portion 2 and the seismic isolation portion 3. The interlayer displacement sensor 6 detects a relative displacement amount in the horizontal direction between the lower hoistway 5a and the upper hoistway 5b.

A machine room 7 is provided in the upper part of the hoistway 5. In the machine room 7, a hoisting machine 8, a deflecting wheel 9, a control device 10, and an earthquake detector 11 are installed. The hoisting machine 8 has a drive sheave 12, a hoisting machine motor (not shown), and a hoisting machine brake (not shown). The hoist motor rotates the drive sheave 12. The hoisting machine brake brakes the rotation of the drive sheave 12.

A suspension 13 is wound around the drive sheave 12 and the deflecting wheel 9. As the suspension body 13, a plurality of ropes or a plurality of belts are used. A car 14 is connected to a first end of the suspension 13. A counterweight 15 is connected to the second end of the suspension 13.

The car 14 and the counterweight 15 are suspended in the hoistway 5 by a suspension 13. Further, the car 14 and the counterweight 15 move up and down in the hoistway 5 by rotating the drive sheave 12. The controller 10 controls the hoisting machine 8 to raise and lower the car 14 at a set speed.

In the hoistway 5, a pair of car guide rails 16 for guiding the raising and lowering of the car 14 and a pair of counterweight guide rails 17 for guiding the raising and lowering of the counterweight 15 are installed. The car 14 moves up and down along the car guide rails 16. The counterweight 15 moves up and down along the counterweight guide rail 17.

The car 14 is provided with a car door 18. A door motor 19 for opening and closing the car door 18 is provided on the car 14. With the car 14 landing on the stop floor, by opening and closing the car door 18, the landing door (not shown) of the stop floor interlocks with and opens.

When an earthquake occurs, the seismic isolation device 4 absorbs the shaking of the earthquake, so that it is difficult for the seismic isolation unit 3 to transmit the shaking of the earthquake. For example, in the seismic isolation device 4 having seismic isolation rubber, the seismic vibration is absorbed by bending the seismic isolation rubber in the horizontal direction.

On the other hand, in the elevator, when a shake is detected by the seismic sensor 11, the car 14 is stopped at the nearest floor and the passengers are unloaded from the car 14. After this, the control device 10 determines the level of vibration, and automatically returns to the normal operation if the level of vibration is equal to or less than the first set level. In addition, if the level of shaking is higher than the first set value, the control device 10 performs an earthquake control operation after an earthquake.

In the earthquake control operation, the control device 10 performs the automatic recovery operation if the level of the sway is equal to or less than a second set value larger than the first set value. In the automatic restoration operation, it is determined whether or not there is an abnormality in the elevator while moving the car 14 at a low speed, and if there is no abnormality, the normal operation returns. If the level of swing is greater than the second set value, the elevator operation is halted and the remote monitoring room is notified.

Here, the horizontal displacement of the seismic isolation device 4 does not return immediately after the earthquake, and there may be a case where relative residual displacement in the horizontal direction occurs between the lower hoistway 5a and the upper hoistway 5b depending on conditions. is there.

For example, in the seismic isolation device 4 having seismic isolation rubber, the amount of horizontal deflection of the seismic isolation rubber increases in accordance with the size of the earthquake. And, due to the characteristics of the seismic isolation rubber, deflection may remain as residual displacement after an earthquake. The interlayer displacement sensor 6 generates a signal according to the magnitude of the residual displacement between the lower hoistway 5a and the upper hoistway 5b.

FIG. 2 is a block diagram showing an essential part of the elevator of FIG. The control device 10 has a control device main body 10A. The control device main body 10 </ b> A includes an operation control unit 20 and an abnormality detection unit 21. The operation control unit 20 controls the operation of the hoisting machine 8 in response to a call from inside the landing and the car 14 during normal operation. Further, the operation control unit 20 controls the operation of the hoisting machine 8 based on the signal from the earthquake sensor 11 when an earthquake occurs.

The abnormality detection unit 21 determines the presence or absence of abnormality during the automatic recovery operation based on the command from the operation control unit 20, and transmits the determination result to the operation control unit 20. The abnormality detection unit 21 receives a signal from the interlayer displacement sensor 6.

Further, the abnormality detection unit 21 receives a signal corresponding to the torque of the hoisting machine 8 during the automatic recovery operation. In this example, the abnormality detection unit 21 receives a signal from the hoist current sensor 25. Instead of the signal from the hoist current sensor 25, for example, a current command value signal may be used.

Further, a signal from the car position sensor 26 is input to the abnormality detection unit 21. As the car position sensor 26, for example, a rotation detector provided in a speed governor (not shown), a rotation detector provided in the hoisting machine 8, and a plurality installed in the hoistway 5 Or at least one of the reference position switches (not shown) of

The abnormality detection unit 21 includes a reference storage unit 22, a threshold switching unit 23, and an abnormality determination unit 24. The reference storage unit 22 stores, for each car position, the normal value of the hoist current value based on the current value information from the hoist current sensor 25 and the car position information from the car position sensor 26. The winding machine current value for each car position differs depending on the installation of the guide rails 16 and 17 for each building.

The threshold switching unit 23 sets a threshold, which is a determination criterion of the presence or absence of abnormality, based on the data at the time of normal stored in the reference storage unit 22, and sends the threshold to the abnormality determination unit 24. Further, the threshold value switching unit 23 switches the threshold value sent to the abnormality determination unit 24 based on the signal from the interlayer displacement sensor 6. That is, the threshold value switching unit 23 changes the determination criterion of the presence or absence of abnormality according to the magnitude of the residual displacement in the horizontal direction occurring between the lower hoistway 5a and the upper hoistway 5b after the earthquake.

Based on the information from the winding machine current sensor 25, the information from the car position sensor 26, and the threshold value sent from the threshold value switching unit 23, the abnormality determination unit 24 determines that the winding machine current value is within the judgment standard. Monitor whether there is any and determine the presence or absence of abnormality.

The control device main body 10A can be configured by a computer having a CPU that executes arithmetic processing and a memory that stores a program. In this case, each block constituting the control device body 10A is stored in the memory as software.

FIG. 3 is a graph showing an example of a normal winding machine current value stored in the reference storage unit 22 of FIG. 2 and an example of the threshold value set by the threshold value switching unit 23 based thereon. In FIG. 3, the winding machine current value at the normal time measured in advance is indicated by a solid line as a reference value. Further, a threshold set with an interval above the reference value and a threshold set with an interval below the reference value are indicated by broken lines.

In the automatic recovery operation, if the winding machine current value largely deviates from the reference value and exceeds the threshold value due to some abnormality, for example, as shown by the alternate long and short dash line in FIG. Ru. In this case, the automatic restoration operation is stopped, and the elevator is not restored but is in a paused state.

Here, the car guide rail 16 and the counterweight guide rail 17 passing through the seismic isolation layer 1a have a relative displacement even if an assumed relative displacement occurs between the lower hoistway 5a and the upper hoistway 5b. Follows and elastically deforms. Therefore, when the residual displacement as described above occurs after the earthquake, the car guide rail 16 and the counterweight guide rail 17 are deformed near the seismic isolation layer 1a.

FIG. 4 is a graph showing an example of the winding machine current value and the threshold value of FIG. 3 when residual displacement occurs after an earthquake, and the detected value of the winding machine current value is indicated by a solid line. When the car guide rail 16 and the counterweight guide rail 17 are deformed, the traveling resistance of the car 14 and the counterweight 15 fluctuates, and as a result, the winding machine current value in the section of the seismic isolation layer 1a is a threshold May be exceeded.

As shown in FIG. 4, when the winding machine current value exceeds the threshold value, the abnormality determination unit 24 determines that there is an abnormality, and the elevator can not be restored automatically.

On the other hand, in the control device 10 of the first embodiment, the threshold value switching unit 23 switches the threshold value sent to the abnormality determination unit 24 based on the signal from the interlayer displacement sensor 6. Specifically, in the threshold value switching unit 23, a first level as a setting level and a second level larger than the first level are set. Then, if the residual displacement is equal to or less than the first level, the threshold switching unit 23 selects the threshold shown in FIG. 3 and FIG. 4 as the threshold at the time of the automatic recovery operation.

Further, when the residual displacement is greater than the first level and equal to or less than the second level, the threshold switching unit 23 selects a threshold as shown in FIG. 5 as the threshold at the time of the automatic recovery operation. In FIG. 5, the thresholds which are the upper limit and the lower limit of the normal value of the section of the seismic isolation layer 1a are respectively away from the reference value shown in FIG. 3 compared with the case where the residual displacement is equal to or less than the first level. That is, in the section of the seismic isolation layer 1a, the determination criterion of the presence or absence of abnormality is eased, and the upper and lower threshold values are respectively changed so that the range determined as no abnormality is expanded.

Furthermore, when the residual displacement is larger than the second level, the control device main body 10A stops the operation of the elevator without notifying the automatic recovery operation, and notifies the remote monitoring room.

The degree of relaxation of the judgment standard is calculated by calculating the amount of deformation of the guide rails 16 and 17 assumed when the residual displacement of the second level occurs, and setting the winding machine current value corresponding to the calculated amount of deformation. It is sufficient to calculate and set the winding machine current value to be within the normal range.

According to the control device 10 and control method of such an elevator, a criterion for determining the presence or absence of abnormality according to the magnitude of the residual displacement in the horizontal direction occurring between the lower hoistway 5a and the upper hoistway 5b after the earthquake. Therefore, after the occurrence of an earthquake, it is possible to diagnose the state of the elevator more appropriately.

In addition, when the magnitude of the residual displacement is larger than the first level, the determination criterion in the residual displacement affected zone is changed so that the range where it is determined that there is no abnormality is wider than when it is lower than the first level. Therefore, although the change of the elevator due to the influence of the residual displacement is relatively small and there is no hindrance to the operation of the elevator, it is possible to reduce the number of cases where it is determined that there is an abnormality in the automatic restoration operation. Thereby, the fall of the operating rate of an elevator can be suppressed.

Furthermore, during automatic recovery operation, it is monitored whether the signal corresponding to the value of the hoisting machine current, that is, the torque of the hoisting machine 8 is within the judgment standard, so the amount of deformation of the guide rails 16 and 17 due to residual displacement is It can be easily monitored whether it is below the allowable amount.

In addition, although the judgment standard was eased only in the section of the seismic isolation layer 1a in FIG. 5, the range which changes a judgment standard is not limited to this, The range in which the residual displacement of the seismic isolation system affects a guide rail That is, it can be appropriately set as a residual displacement affected zone.

In addition, the method of alleviating the determination criteria also includes a method of setting the determination result of the presence or absence of abnormality in the residual displacement affected zone to no abnormality regardless of the detected value of the winding machine current. That is, the diagnosis of the residual displacement affected zone may be invalidated.

Furthermore, in the method of relaxing the judgment criteria, the threshold value is not changed according to the level of residual displacement, and the detected value in the residual displacement affected zone is multiplied by a coefficient larger than 0 and smaller than 1 according to the level of residual displacement. There is also a way.

Furthermore, in the first embodiment, although the detection target in the automatic recovery operation is the hoisting machine torque, the present invention is not limited to this. An object to be detected may be, for example, at least one of a car vibration acceleration, a car internal noise, and an open / close state of a door. In addition, it may be a combination of at least one of the car vibration acceleration, the car internal noise, and the open / close state of the door, and the hoisting machine torque. When two or more detection targets are present, the residual displacement influence zone can be set in a different range for each signal used for diagnosis.

For a detection target such as a car vibration acceleration and a noise in a car for which a reference of a normal state is determined, the reference can be used as a determination reference of the presence or absence of an abnormality.

In an elevator including a movable landing that follows a horizontal displacement between the lower hoistway 5a and the upper hoistway 5b, the open / close state of the door when the car lands on the floor of the movable landing due to the influence of the residual displacement May be worse. In such a case, the floor of the movable landing is taken as a residual displacement influence zone.

When the open / close state of the door is to be detected for the automatic recovery operation, it is determined whether a signal corresponding to the torque of the door motor that integrally opens and closes the car door and the landing door, for example, the door motor current value is within the determination standard. Good. In this case, the door motor current value at the normal time is stored in the reference storage unit as a reference value. Then, as in the case of the winding machine current value according to the first embodiment, the threshold switching unit eases the determination criterion of the open / close state of the floor door in the residual displacement affected zone when the residual displacement is larger than the set level. Do. The relaxed threshold value is set in advance by estimating the degree of influence of the assumed residual displacement on the door.

Also, instead of the signal corresponding to the torque of the door motor, it may be determined whether the door open / close time is within the judgment standard. In this case, the door open / close time in the normal state is stored in the reference storage unit as a reference value. Then, when the residual displacement is larger than the set level, the threshold value switching unit relaxes the determination reference of the open / close state of the door of the floor of the residual displacement affected zone.

Moreover, in Embodiment 1, although the 1st and 2nd level was set as a level of a residual displacement, you may set three or more levels.

For example, a first level, a second level greater than the first level, and a third level greater than the second level may be set. When the residual displacement is equal to or less than the first level and equal to or less than the second level larger than the first level, the same automatic recovery operation as that of the first embodiment is performed.

Also, if the residual displacement is greater than the second level and less than the third level, the automatic recovery operation is performed only in the range where the car does not pass through the residual displacement affected zone, and if there is no abnormality, the automatic recovery operation Resume the operation only in the range where Furthermore, when the residual displacement is larger than the third level, the automatic recovery operation is not performed, the operation of the elevator is stopped, and the remote monitoring room is notified.

Furthermore, although the interlayer displacement sensor 6 is provided between the base portion 2 and the seismic isolation portion 3 in the above example, the interlayer displacement sensor 6 may be provided in the seismic isolation device 4.
Furthermore, the seismic isolation device is not limited to the type using seismic isolation rubber.
Also, the functions of the control device main body may be divided into a plurality of devices and implemented.
Furthermore, the layout of the equipment of the entire elevator and the roping method etc. are not limited to the example of FIG.
Furthermore, the present invention can be applied to various types of elevators, such as machine room-less elevators, double deck elevators, and elevators of a one-shaft multicar system. The one-shaft multicar system is a system in which the upper car and the lower car placed immediately below the upper car move up and down the common hoistway independently of one another.

Reference Signs List 1 seismically isolated building, 1a seismic isolation layer, 5 hoistways, 5a lower hoistway, 5b upper hoistway, 8 hoisting machines, 10 controllers, 10A control body, 14 cars, 18 car doors.

Claims

A control device for controlling an elevator provided in a seismic isolation structure building, comprising:
It has a control device body that carries out an automatic recovery operation that determines the presence or absence of an abnormality of the elevator while moving a car after an earthquake.
The control device body is adapted to the horizontal residual displacement occurring between the lower hoistway below the seismic isolation layer and the upper hoistway above the seismic isolation layer after the earthquake, The control apparatus of the elevator which changes the determination criteria of the presence or absence of abnormality in the said automatic restoration driving | operation.
The control device body, when the magnitude of the residual displacement is larger than the set level, the determination criterion in the residual displacement affected zone, which is a zone affected by the residual displacement of the hoistway, is equal to or less than the set level. The elevator control device according to claim 1, wherein the control unit changes the range in which it is determined that there is no abnormality more than when it is.
The control device for an elevator according to claim 1 or 2, wherein the control device main body monitors whether or not torque of a hoist is within the judgment standard during the automatic recovery operation.
The control device main body monitors whether or not at least one of a car vibration acceleration, a car internal noise, and an open / close state of a door is within the judgment criteria during the automatic recovery operation. The elevator control device according to any one of the above.
A control method for controlling an elevator provided in a seismic isolation structure building, comprising:
When performing an automatic restoration operation to determine the presence or absence of an abnormality of the elevator while moving a car after an earthquake, between the lower shaft below the seismic isolation layer and the upper hoistway above the seismic isolation layer The control method of the elevator which changes the determination criteria of the presence or absence of abnormality in the said automatic recovery driving | operation according to the magnitude | size of the residual displacement to the horizontal direction which has arisen.
When the magnitude of the residual displacement is larger than the set level, the judgment criterion in the residual displacement affected zone, which is a zone affected by the residual displacement of the hoistway, is not abnormal than when the level is equal to or lower than the set level. The control method of the elevator of Claim 5 which changes so that the determination range may be extended.