WO2016113881A1

WO2016113881A1 - Elevator device and control method therefor

Info

Publication number: WO2016113881A1
Application number: PCT/JP2015/050959
Authority: WO
Inventors: 柴田　益誠; 大樹福井; 琢夫釘谷
Original assignee: 三菱電機株式会社
Priority date: 2015-01-15
Filing date: 2015-01-15
Publication date: 2016-07-21

Abstract

In this elevator device, after the power supply to an elevator control device and a safety monitoring device is interrupted, if the power supply is resumed, the safety monitoring device outputs, to the elevator control device, a command that limits the speed of the car, and a command that implements car position recognition operation, which moves the car to a reference position in order to recognize the position of the car. When the elevator control device implements car position recognition operation, the car position information from the moment before the power supply stopped, said information being stored in a car position storage unit, is compared with reference position information stored in a reference position storage unit, and the car is moved to the closest destination in order to detect a reference position.

Description

Elevator apparatus and control method thereof

The present invention relates to an elevator apparatus that performs a car position recognition operation when power supply is resumed after power supply is cut off, and a control method therefor.

In a conventional elevator apparatus, when a certain period of time elapses in a state in which the car is in a door-open standby state, a standby signal is output from the elevator control device to a device such as a drive device, and power supply to the device such as the drive device is cut off. At this time, power supply to the destination floor registration device and the hall call registration device is maintained.

Thereafter, when the operation button of the hall call registration device is operated, the call direction indicator lamp corresponding to the operated operation button is turned on, and a call registration signal is input to the elevator control device. When the call registration signal is input, a standby release signal is output from the elevator control device to a device such as a drive device, and power supply to the device such as the drive device is resumed (see, for example, Patent Document 1).

Also, in other conventional elevator devices, the power supply to some devices is stopped by the elevator control device when it is not in use. At this time, the power supply to the safety monitoring device is also stopped. When the power supply is cut off, the safety monitoring device stops functioning without following the procedure for storing the position information. For this reason, when the power supply is resumed, the elevator control device performs a car position recognition operation in which the safety monitoring device moves the car to a position where the car position is recognized (see, for example, Patent Document 2).

JP 2009-91132 A JP 2013-119467 A

In the conventional elevator apparatus shown in Patent Document 1, when the power supply to the safety monitoring apparatus that monitors whether there is an abnormality is resumed, an operation for causing the safety monitoring apparatus to recognize the state of the elevator is required. . This causes an increase in time until the service is restarted from the state where the power supply of standby power is cut off, resulting in a decrease in serviceability of the elevator apparatus.

On the other hand, in the conventional elevator apparatus shown in Patent Document 2, the elevator control apparatus performs the car position recognition operation when the power supply is resumed, but the car speed in the car position recognition operation is limited to a low value. Since it is not known whether the car position can be recognized efficiently if the car is driven in the direction, the car position recognition driving time may be increased, and it is required to further reduce the time required for preparation for service resumption. Yes. In particular, in an elevator apparatus with a high head, when an inefficient car position recognition operation is performed, it takes a long time to restart the service.

The present invention has been made to solve the above-described problems, and has sufficiently reduced the time required for preparation for service resumption when the power supply is resumed after stopping the power supply. It is an object of the present invention to obtain an elevator apparatus and a control method thereof that can suppress the decrease.

An elevator apparatus according to the present invention includes a car that moves up and down in a hoistway, a car position detection device that generates a signal corresponding to the movement of the car, and a reference position detection device that detects that the car is located at a reference position in the hoistway , A car position storage unit for detecting the moving distance of the car from the reference position based on signals from the car position detecting device and the reference position detecting device and storing it as car position information, and a reference position memory for storing information on the reference position And an elevator control device that controls the operation of the car, and a safety monitoring device that monitors the presence or absence of an abnormality, and after the power supply to the elevator control device and the safety monitoring device is cut off, the power supply When the vehicle is restarted, the safety monitoring device issues a command for limiting the speed of the car and a command for performing a car position recognition operation for moving the car to the reference position in order to recognize the car position. When the elevator control device performs the car position recognition operation, the elevator control device stores the car position information immediately before the power supply stored in the car position storage unit stops and the reference position storage unit. The car is moved to the shortest destination in order to detect the reference position by comparing the information with the reference position information.
The elevator apparatus according to the present invention includes a car that moves up and down in the hoistway, a car position detection device that generates a signal corresponding to the movement of the car, and a reference position that detects that the car is located at a reference position in the hoistway. A car position storage unit that detects the movement distance of the car from the reference position based on signals from the detection device, the car position detection device, and the reference position detection device, and stores it as car position information, and a reference for storing reference position information And an elevator control device that controls the operation of the car, and a safety monitoring device that monitors the presence or absence of an abnormality, and the reference position detection device is a self-diagnosis device that diagnoses the presence or absence of its own failure. When the power supply is restarted after the power supply to the elevator control device and the safety monitoring device is shut off, the safety monitoring device outputs a self-diagnosis command to the self-diagnosis unit. Reference position detecting device determines whether the normal.
The elevator apparatus control method according to the present invention further includes a car position for moving the car to a reference position in the hoistway in order to recognize the car position when the power supply is resumed after the power supply is cut off. When the car position recognition operation is performed, the car position information immediately before the stored power supply is stopped is compared with the stored reference position information. The car is moved to the shortest destination to detect the reference position.

According to the elevator apparatus and its control method of the present invention, it is possible to sufficiently shorten the time required for preparation for service restart when the power supply is restarted after stopping the power supply, and to suppress the deterioration of serviceability.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. It is a block diagram which shows the control system of the elevator apparatus of FIG. It is a graph which shows the overspeed monitoring standard at the time of the normal driving | operation set to the safety monitoring apparatus of FIG. It is a graph which shows the overspeed monitoring reference | standard at the time of the cage position recognition driving | operation set to the safety monitoring apparatus of FIG. It is a flowchart which shows the operation | movement at the time of the car position recognition driving | operation of the safety monitoring apparatus of FIG. It is a flowchart which shows the operation | movement at the time of the car position recognition driving | operation of the elevator control apparatus of FIG. It is a graph which shows an example of the specific driving | running | working pattern in a cage position recognition driving | operation. It is a circuit diagram which shows an example of a structure of the reference | standard position detection apparatus of FIG. It is a graph which shows an example of the driving | running | working pattern of the cage position recognition driving | operation when two reference positions are set in the hoistway 1. FIG. It is a block diagram which shows the elevator apparatus by Embodiment 2 of this invention. It is a block diagram which shows the modification which added the reference position detection apparatus and detected body of Embodiment 1 to the elevator apparatus of Embodiment 2. FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a machine room 2 is provided in the upper part of the hoistway 1. A drive device 3 is installed in the machine room 2. As the driving device 3, a hoisting machine is used. The drive device 3 includes a drive sheave 4, a motor (not shown) that rotates the drive sheave 4, and a brake (not shown) that brakes the rotation of the drive sheave 4.

A suspension 5 is wound around the drive sheave 4. As the suspension body 5, a plurality of ropes or a plurality of belts are used. A car 6 is connected to the first end of the suspension body 5. A counterweight 7 is connected to the second end of the suspension body 5.

The car 6 and the counterweight 7 are suspended in the hoistway 1 by the suspension body 5 and are moved up and down in the hoistway 1 by the driving force of the driving device 3. In the hoistway 1, a pair of car guide rails (not shown) for guiding the raising and lowering of the car 6 and a pair of counterweight guide rails (not shown) for guiding the raising and lowering of the counterweight 7 are installed. Has been.

In the machine room 2, an elevator control device 8 and a safety monitoring device (electronic safety device) 9 are installed. The elevator control device 8 controls the operation of the car 6 by controlling the drive device 3. The elevator control device 8 performs operation management of the car 6, control of the power source, and the like.

The safety monitoring device 9 monitors the state of the elevator device (whether there is an abnormality). Each of the elevator control device 8 and the safety monitoring device 9 has an independent computer. Thereby, the safety monitoring device 9 monitors the state of the elevator device independently of the elevator control device 8.

In the machine room 2, a governor 10 is installed. The governor 10 includes a governor sheave 11. A governor rope 12 is wound around the governor sheave 11. The governor rope 12 is laid annularly in the hoistway 1 and connected to the car 6. Further, the governor rope 12 is wound around a tension wheel 13 disposed at the lower part of the hoistway 1.

The governor sheave 11 rotates as the car 6 moves up and down. That is, when the car 6 moves up and down, the governor rope 12 circulates and the governor sheave 11 rotates at a rotational speed corresponding to the traveling speed of the car 6.

The governor sheave 11 is provided with a car position detecting device 14 for detecting a relative car position. The car position detection device 14 generates a signal corresponding to the movement of the car 6. In addition, as the car position detection device 14, for example, an encoder that generates a pulse signal corresponding to the rotation of the governor sheave 11 or a resolver is used.

A detected object 15 is installed at a reference position in the hoistway 1. A reference position detection device 16 is mounted on the car 6. The reference position detection device 16 detects that the car 6 is located at the reference position in the hoistway 1 by detecting the detected object 15.

The reference position is a predetermined position in an area through which the car 6 in the hoistway 1 passes. In this example, the reference position is set to one position within the range from the lowest floor to the position where the car 6 stopped on the lowest floor rises at the acceleration of normal operation and reaches the rated speed.

As the detected object 15, for example, a plate having unique information such as ID information is used. As the reference position detection device 16, for example, a sensor that reads information on the plate when the car 6 passes the reference position is used.

A car shock absorber 17 and a counterweight shock absorber 18 are installed at the bottom (pit) of the hoistway 1.

FIG. 2 is a block diagram showing a control system of the elevator apparatus of FIG. The elevator control device 8 includes a car position storage unit 21, a first reference position storage unit 22, and a destination determination unit 23. The car position storage unit 21 stores the latest car position information. The first reference position storage unit 22 stores a reference position in the hoistway 1. The destination determination unit 23 determines the destination of the car position recognition operation that is performed when the power supply is resumed. The functions of the first reference position storage unit 22 and the destination determination unit 23 are realized by a computer of the elevator apparatus.

The safety monitoring device 9 has a second reference position storage unit 24 and a self-diagnosis command unit 25. The second reference position storage unit 24 stores a reference position in the hoistway 1. The self-diagnosis command unit 25 outputs a self-diagnosis command to the reference position detection device 16. The functions of the second reference position storage unit 24 and the self-diagnosis command unit 25 are realized by the computer of the safety monitoring device 9.

The reference position detection device 16 has a self-diagnosis unit 26 for diagnosing the presence or absence of a self-failure in response to a self-diagnosis command from the self-diagnosis command unit 25. In the first and second reference

position storage units

22 and 24, the reference position where the detected object 15 is installed is stored in advance at the time of factory shipment.

The car position storage unit 21 receives a signal from the car position detection device 14 and a signal from the reference position detection device 16. The car position storage unit 21 detects the movement distance of the car 6 from the reference position based on the signals from the car position detection device 14 and the reference position detection device 16, and stores it as car position information. Further, the car position storage unit 21 always stores the latest car position information while updating it.

As the car position storage unit 21, the first reference position storage unit 22, and the second reference position storage unit 24, a memory that continues to store information even during a power failure is used.

The signal from the car position detection device 14 and the signal from the reference position detection device 16 are directly input to the safety monitoring device 9 without passing through the elevator control device 8. As shown in FIG. 3, the safety monitoring device 9 is set with an overspeed monitoring reference V <b> 1 during normal operation that changes according to the car position. The overspeed monitoring reference V1 is set so as to continuously decrease toward the final floor (the lowermost floor and the uppermost floor) in the car deceleration section of the hoistway terminal.

In FIG. 3, a traveling curve V0 is a curve depicting a trajectory of speed when the car 6 normally travels from the upper terminal floor (or the lower terminal floor) to the lower terminal floor (or the upper terminal floor). The overspeed monitoring reference V1 is set higher than the travel curve V0, and is set so as not to detect the overspeed as long as the car 6 travels normally.

Since the safety monitoring device 9 monitors the car speed using the overspeed monitoring reference V1 that changes according to the position of the car 6, the reference position is determined based on the signals from the car position detection device 14 and the reference position detection device 16. The moving distance of the car 6 from (for example, P1 in FIG. 3) is detected and stored as car position information.

As shown in FIG. 3, in the overspeed monitoring reference V1, since the reference value V10 at the terminal floor is lower than the reference value V11 at the intermediate floor, the

shock absorbers

17 and 18 installed at the bottom of the hoistway 1 are used. Instead of the shock absorber corresponding to the reference value V11, a small shock absorber corresponding to the reference value V10 can be applied.

For example, when the power supply is resumed after the power supply to the elevator control device 8 and the safety monitoring device 9 is cut off due to power interruption or power failure when the use is not in use, the safety monitoring device 9 Is output to the elevator control device 8. A command for limiting the vehicle (speed limit command) and a command for executing the car position recognition operation for moving the car 6 for recognizing the car position to the reference position (car position recognition command) are output to the elevator control device 8.

When the elevator control device 8 performs the car position recognition operation, the car position information immediately before the power supply stored in the car position storage unit 21 is stopped and the first reference position storage unit 22 are stored. The car 6 is moved to the shortest destination in order to detect the reference position by comparing the information with the reference position information.

Also, the safety monitoring device 9 is also set with an overspeed monitoring reference V1 'during the car position recognition operation as shown in FIG. The overspeed monitoring reference V <b> 1 ′ is constant regardless of the position of the car 6. If the power supply is resumed after the power supply to the elevator control device 8 and the safety monitoring device 9 is cut off, the car 6 may be moving during the power cut-off. For this reason, the safety monitoring device 9 cannot use the signal from the car position detecting device 14 until the detected object 15 is detected by the reference position detecting device 16.

Therefore, during the car position recognition operation, as shown in FIG. 4, an overspeed monitoring reference V1 ′ that is a constant reference value (V10 in this example) is applied regardless of the car position. At this time, the traveling curve V0 ′ is also limited to be lower than the overspeed monitoring reference V1 ′.

The reference position detection device 16 is duplicated to ensure reliability because there is a possibility that the reference position detection device 16 is broken while the power supply is stopped. Further, the reference position detection device 16 has a self-diagnosis function by the self-diagnosis unit 26 in order to detect a failure that cannot be prevented even by duplication.

The self-diagnosis unit 26 outputs a normal diagnosis signal to the self-diagnosis command unit 25 if the duplicated reference position detection device 16 is normal with respect to the self-diagnosis command from the safety monitoring device 9.

FIG. 5 is a flowchart showing the operation of the car monitoring operation of the safety monitoring device 9 of FIG. When power supply is resumed after the power supply is stopped, a stop command is first output to the elevator control device 8 (step S1). This is because it is inappropriate if the car 6 is moving at the time of resumption of power supply, so that the stopped state of the car 6 can be obtained more reliably.

Subsequently, a speed limit command corresponding to the low excessive speed monitoring reference V1 'is output to the elevator control device 8 (step S2). Thereafter, a self-diagnosis command is output to the self-diagnosis unit 26 (step S3). Then, based on the output from the self-diagnosis unit 26, it is determined whether or not the reference position detection device 16 is normal (step S4). When it is determined that the reference position detection device 16 is normal, a car position recognition command is output to the elevator control device 8 (step S5).

On the other hand, when it cannot be determined that the reference position detection device 16 is normal, the process returns to step S3, the self-diagnosis command is output again, and it is determined again whether the reference position detection device 16 is normal. If it is not possible to determine that the reference position detection device 16 is normal even if the output and determination of the self-diagnosis command is repeated a set number of times, the control room is informed that the reference position detection device 16 has failed, and the elevator apparatus is suspended. Let

In addition, when a failure of the reference position detection device 16 is detected by the first determination, the self-diagnosis command may not be output again, and the notification to the control room and the suspension of the elevator device may be performed as they are.

After outputting the car position recognition command, it is confirmed whether or not the reference position has been confirmed (step S6). When the detected object 15 is detected by the reference position detection device 16 and the reference position is determined, a speed limit release command is output to the elevator control device 8 and the process proceeds to a monitoring operation during normal operation.

FIG. 6 is a flowchart showing the operation of the elevator control device 8 of FIG. 2 during the car position recognition operation. When the elevator control device 8 receives a car position recognition command from the safety monitoring device 9 (step S11), the car position information immediately before the power supply stored in the car position storage unit 21 stops and the first reference position The reference position information stored in the storage unit 22 is compared with the destination determination unit 23, and one of the stop floors of the car 6 is selected and determined as the destination of the car position recognition operation (step S12).

When the destination is determined, the car position recognition operation is started (step S13). In the car position recognition operation, the driving device 3 is controlled to cause the car 6 to travel to the destination stop floor at a low speed. During the car position recognition operation, it is confirmed whether or not the reference position has been confirmed (step S14). When the detected object 15 is detected by the reference position detection device 16, the reference position is fixed, and the car 6 arrives at the destination stop floor, the car position recognition operation is terminated, and the control is shifted to the control during the normal operation.

FIG. 7 is a graph showing an example of a specific traveling pattern of the car 6 in the car position recognition operation, and shows the relationship between the time and the position of the car 6. When the power supply is resumed at time T0, the car position information Ps stored in the car position storage unit 21 immediately before the power supply is stopped is used as the reference position information P1 stored in the first reference position storage unit 22. Compare with Then, the stop floor of the shortest route that can detect the reference position P1 is selected and determined as the destination.

Thereafter, the car position recognition operation starts at time T1, arrives at the reference position P1 at time T2, and the reference position is determined.

On the other hand, when the car position information immediately before the power supply is stopped is not used, there is a possibility that the car 6 may run in the direction opposite to the reference value P1, as indicated by the broken line in FIG. In this case, the reference position is determined by reaching the reference position P1 at time T3, and the time until the elevator apparatus resumes normal service increases. In particular, in an elevator with a long ascending / descending stroke, the time until resumption significantly increases.

Also, as described above, there is a possibility that the car position is moving during the power interruption, and in this case, the reference position P1 may not be reached in the shortest time. However, there are relatively few cases where the car position is moving during power interruption, and the elevator system as a whole has enough time to prepare for service resumption by using the car position information immediately before the power supply stops. To reduce the serviceability.

Further, the reference position detection device 16 is provided with a self-diagnosis unit 26 for diagnosing the presence or absence of a self-failure. After the power supply to the elevator control device 8 and the safety monitoring device 9 is cut off, When the supply is resumed, the safety monitoring device 9 outputs a self-diagnosis command to the self-diagnosis unit 26 and determines whether or not the reference position detection device 16 is normal. For this reason, it is possible to sufficiently shorten the time required for preparation for service restart when the power supply is restarted after the power supply is stopped, and to suppress deterioration in serviceability.

If the car position is moving during power interruption and the reference position is not detected even if the car 6 is moved to the expected position, the car position recognition operation is performed at a low speed until the reference position is detected. Continue.

Here, FIG. 8 is a circuit diagram showing an example of the configuration of the reference position detection device 16 of FIG. The reference position detection device 16 includes an excitation coil 31, a detection coil 32, a first test coil 33, a second test coil 34, a first test switch 35, a second test switch 36, and a pair of third tests.

Switches

37a and 37b are provided.

The excitation coil 31 and the detection coil 32 are opposed to each other across a region where the detection target 15 is extended in the vertical direction. By passing a current through the exciting coil 31, a magnetic flux is generated in the exciting coil 31. At this time, if the detection target 15 does not exist between the excitation coil 31 and the detection coil 32, a current flows through the detection coil 32 due to the magnetic flux generated in the excitation coil 31.

Further, when the detection target 15 exists between the excitation coil 31 and the detection coil 32, the eddy current generated in the detection target 15 generates a magnetic flux that cancels the magnetic flux from the excitation coil 31, and the detection coil 32 has a current. Does not flow. Based on the output from the detection coil 32, the presence or absence of the detection target 15 is detected.

In addition, by providing a plurality of slits, openings, or notches, etc., spaced apart from each other in the ascending / descending direction of the car 6 on the plate constituting the detected object 15, individual information can be given to the detected object 15. . Further, by using two sets of the configuration as shown in FIG. 8, it is possible to detect a failure by duplication.

The excitation coil 31, the detection coil 32, the first test coil 33, and the second test coil 34 are arranged on the same axis. The first test coil 33 is disposed to face the end of the excitation coil 31 opposite to the detection coil 32. The second test coil 34 is disposed to face the end of the detection coil 32 opposite to the excitation coil 31.

The first test switch 35 is normally open, but is closed during the self-diagnosis of the reference position detection device 16. By closing the first test switch 35, a closed circuit is formed in which both ends of the first test coil 34 are short-circuited.

The second test switch 36 is normally open, but is closed during the self-diagnosis of the reference position detection device 16. By closing the second test switch 36, a closed circuit is formed in which both ends of the second test coil 35 are short-circuited.

The

third test switches

37a and 37b are normally open, but are closed during the self-diagnosis of the reference position detection device 16. By closing the

third test switches

37a and 37b, a closed circuit in which the first test coil 33 and the second test coil 34 are connected in series is formed. The self-diagnosis unit 26 includes a circuit including test coils 33 and 34 and

test switches

35, 36, 37a, and 37b.

From the self-diagnosis command unit 25, first and second diagnosis command signals that are two different types of signals are sequentially output as self-diagnosis commands. When a first diagnosis command signal (for example, a high signal) is input as a self-diagnosis command, the self-diagnosis unit 26 closes the first and second test switches 35 and 36. Thereby, an electromotive force in a direction to cancel the magnetic field of the exciting coil 31 is generated in the first test coil 33 regardless of the presence or absence of the detection target 15.

Therefore, if the reference position detection device 16 is normal, the output from the self-diagnosis unit 26 in response to the self-diagnosis command is always the output when the detected object 15 is present. Therefore, when a signal at the time of non-detection of the detected object is output, it can be diagnosed that a fixing failure that continues to hold the output at the time of non-detection of the detected object has occurred.

Further, when a second diagnosis command signal (for example, a rectangular wave signal) is input as the self-diagnosis command, the self-diagnosis unit 26 closes the

third test switches

37a and 37b. As a result, the first and second test coils 33 and 34 and the detection coil 32 resonate due to the electromotive force and the magnetic field regardless of the presence or absence of the detection target 15.

Therefore, if the reference position detection device 16 is normal, the output from the self-diagnosis unit 26 in response to the self-diagnosis command is always an output when there is no detected object 15. Accordingly, when a signal at the time of detection of the detected object is output, it can be diagnosed that a fixing failure that continues to hold the output at the time of detection of the detected object has occurred.

In addition, the position and number of the reference positions in the hoistway 1 are not limited to the above example. For example, FIG. 9 is a graph showing an example of a traveling pattern of the car position recognition operation when two reference positions P1 and P2 are set in the hoistway 1. The reference position P1 is set at the same position as in FIG. 7, and the reference position P2 is set near the top floor.

When the power supply is resumed, the car position information Ps stored in the car position storage unit 21 immediately before the power supply is stopped is used as the reference position information P1, stored in the first reference position storage unit 22. Compared with P2, the stop floor of the shortest route capable of detecting the reference position closer to Ps is selected and determined as the destination.

In this way, when there are two or more reference positions, the car position information Ps stored in the car position storage unit 21 immediately before the power supply is stopped is stored in all the first reference position storage units 22. Compared with the reference position information, the car position recognition operation may be started so as to detect the closest reference position.

Further, for example, one reference position may be installed on the intermediate floor in the hoistway 1 and the car 6 may always be driven toward the intermediate floor in the car position recognition operation.

Further, in the above example, it is assumed that the detected object 15 is installed without error at a predetermined position through which the car 6 in the hoistway 1 passes. However, the detected object 15 is within an allowable error range. The safety monitoring device 9 may be provided with a function for checking whether or not it is installed.

Specifically, for example, the distance from the landing level on the lowest floor to the detected object 15 is stored in the second reference position storage unit 24, and the inspection operation from the lowest floor is performed after installation. Then, the distance from the landing level on the lowest floor to the detected object 15 is detected as an integrated value of the signal from the car position detection device 14, and the detected value is compared with the stored value. It may be determined whether it is installed within an error range.

Here, the distance from the landing level on the lowest floor to the detected object 15 has been described as an example, but a dedicated switch is separately provided at the end of the hoistway 1 to detect the distance from the switch to the detected object 15. May be.

Further, the distance to the detected object 15 during the inspection operation may be stored in the first and second reference

position storage units

22 and 24 as a learning value. Further, the learning value may be updated by periodically performing a check operation.

Embodiment 2. FIG.
Next, FIG. 10 is a block diagram showing an elevator apparatus according to Embodiment 2 of the present invention. In the elevator apparatus according to the second embodiment, as a reference position detection apparatus, a lower reference position switch 41 operated when the car 6 moves to the lowermost floor and an upper part operated when the car 6 moves to the uppermost floor. A reference position switch 42 is used. Each of the reference position switches 41 and 42 has a forcible separation mechanism (a mechanism for forcibly opening the contact when not in operation). A cam 43 as an operation member for operating the reference position switches 41 and 42 is attached to the car 6.

The lower reference position switch 41 is installed at a position where the off state is maintained until the car 6 stops at the lowest floor after the car 6 travels downward and the lower reference position switch 41 is operated. Yes. The upper reference position switch 42 is installed at a position where the off state is maintained until the car 6 stops on the top floor after the car 6 travels upward and the upper reference position switch 42 is operated. ing. Other configurations and operations are the same as those in the first embodiment.

Even with such an elevator device, the car position recognition operation is performed using the car position information immediately before the power supply is stopped, thereby sufficiently shortening the time required for service resumption and reducing the serviceability. Can be suppressed.

In addition, since each of the reference position switches 41 and 42 has a forced separation mechanism, an on-failure in which the contact remains closed does not occur. In addition, since the reference position switches 41 and 42 are installed at the positions as described above, even if an off failure occurs in the reference position switches 41 and 42, the positions of the reference position switches 41 and 42 can be mistaken toward the terminal floor. The overspeed monitoring by the safety monitoring device 9 is possible.

Furthermore, the configuration can be simplified by using the reference position switches 41 and 42.

Furthermore, the reference position switches 41 and 42 generate a contact sound when operated by the cam 43, but are arranged on the lowest floor and the top floor where the traveling speed of the car 6 is low, so that the contact sound can be kept small.

If it is desired to set the reference position near the intermediate floor where the car 6 may pass at high speed, in addition to the configuration of the second embodiment, as shown in FIG. The detection body 15 may be installed on the intermediate floor, and the reference position detection device 16 may be provided on the car 6. That is,

Embodiments

1 and 2 can be combined as appropriate. Therefore, for example, the inspection operation may be performed also in the configuration of the second embodiment.

Further, the destination of the car position recognition operation does not necessarily have to be a stop floor, but may be between floors.
Furthermore, in the above example, the car position detecting device 14 is provided in the speed governor 10. However, if the signal corresponding to the movement of the car 6 can be generated, the car position detecting device 14 may be provided in another position such as the driving device 3. Good.
Furthermore, the configuration of the reference position detection device 16 is not limited to the first and second embodiments.
In the above example, the safety monitoring device 9 that monitors the car speed is shown. However, the monitoring target is not limited to the car speed.

Furthermore, the layout of the entire elevator apparatus is not limited to the layouts shown in FIGS. For example, the present invention can be applied to an elevator apparatus of a 2: 1 roping method, an elevator apparatus in which a hoisting machine is installed in a lower part of a hoistway, and the like.
Furthermore, the present invention can be applied to all types of elevator devices such as machine room-less elevators, double deck elevators, and one-shaft multi-car elevators in which a plurality of cars are arranged in a common hoistway.

Claims

A car that goes up and down in the hoistway,
A car position detecting device for generating a signal corresponding to the movement of the car;
A reference position detecting device for detecting that the car is located at a reference position in the hoistway;
Based on signals from the car position detecting device and the reference position detecting device, a moving distance of the car from the reference position is detected and stored as car position information, and information on the reference position is stored. An elevator control device that controls the operation of the car, and a safety monitoring device that monitors whether there is an abnormality,
When power supply is resumed after power supply to the elevator control device and the safety monitoring device is interrupted, the safety monitoring device recognizes a command for limiting the speed of the car and a car position. A command for carrying out a car position recognition operation for moving the car to the reference position, is output to the elevator control device;
When the elevator control device performs the car position recognition operation, the car position information immediately before the power supply stored in the car position storage unit stops and the reference stored in the reference position storage unit An elevator apparatus that compares the position information and moves the car to the shortest destination for detecting the reference position.
The reference position detection device has a self-diagnosis unit for diagnosing the presence or absence of a self-failure,
The safety monitoring device outputs a self-diagnosis command to the self-diagnosis unit before outputting a command to execute the car position recognition operation to the elevator control device, and it is determined that the reference position detection device is normal. 2. The elevator apparatus according to claim 1, wherein a command for performing the car position recognition operation is output to the elevator control apparatus in the event of a failure.
A car that goes up and down in the hoistway,
A car position detecting device for generating a signal corresponding to the movement of the car;
A reference position detecting device for detecting that the car is located at a reference position in the hoistway;
Based on signals from the car position detecting device and the reference position detecting device, a moving distance of the car from the reference position is detected and stored as car position information, and information on the reference position is stored. An elevator control device that controls the operation of the car, and a safety monitoring device that monitors whether there is an abnormality,
The reference position detection device has a self-diagnosis unit for diagnosing the presence or absence of a self-failure,
When power supply is resumed after power supply to the elevator control device and the safety monitoring device is interrupted, the safety monitoring device outputs a self-diagnosis command to the self-diagnosis unit, and the reference position detection device Elevator device that determines whether or not is normal.
A control method for an elevator apparatus that performs a car position recognition operation for moving a car to a reference position in a hoistway to recognize a car position when the power supply is resumed after the power supply is cut off. ,
When carrying out the car position recognition operation, it is the shortest in order to detect the reference position by comparing the stored car position information immediately before the power supply stops and the stored reference position information. An elevator apparatus control method for moving the car to a destination.