JP2016069099A - Elevator device and elevator control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of quickly restoring an elevator device which moves a car to the nearest floor and rescues a passenger to a normal operation.SOLUTION: An elevator device includes: a car for which a passenger can get on or off; a driving device which drives the car with electric power; a brake device which can move the car in an open state and suppresses the movement of the car in an actuated state; a position detection device which detects a position of the car and outputs a position detection signal for exhibiting the position; and a control device which recognizes the position of the car based on the position detection signal and controls the driving of the car by means of a driving machine and suppression of the movement of the car by means of the brake device. Therein, a battery power supply, a brake opening switch and a brake opening control circuit which opens the brake device by electric power from the battery power supply when the brake opening switch is turned on and retains such state information that the brake device is opened are further provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for restoring an elevator apparatus that has rescued a passenger to normal operation.

  As background art in this technical field, there is JP-A-2001-316054 (Patent Document 1). This publication discloses a technique that makes it possible to rescue a passenger trapped in the elevator car. Moreover, there exists Unexamined-Japanese-Patent No. 2012-82059 (patent document 2). This publication discloses a technique for performing self-diagnosis of an elevator apparatus using a safety controller.

  The passenger rescue method according to Patent Document 1 includes a first process of performing preparation work in the hoistway, a second process of shutting off the main power source and holding the magnet brake in an open state, and applying a load to the main rope. A third step of applying and moving the car in either the up-down direction, and when the car moves to a rescue position, a braking force is applied by a magnetic brake and the door is opened to rescue the passenger. And a fifth stroke in which the main power is turned on and the restoration work is performed in the hoistway.

JP 2001-316054 A JP 2012-82059 A

  According to the technique of Patent Document 1, it is possible to rescue a passenger trapped in a car stopped at a halfway position. However, the technique of Patent Document 1 has the following problems.

  When an electric power failure occurs, the elevator device described in Patent Document 1 releases the brake device in a state where power is not supplied, and moves the car to the nearest floor to rescue the passenger. Therefore, when the power is restored, the actual position of the car becomes inconsistent with the information on the position of the car that was recognized when the power was lost. For this reason, for example, a position error signal is output. Further, even if a safety microcomputer such as that disclosed in Patent Document 2 is simply used, it is impossible to identify the cause of the discrepancy between the actual position of the car and the information on the position of the car that was recognized when the power was lost. Can't recover.

  When the position abnormality signal is output, in order to restore the elevator apparatus to the normal operation, it is necessary for the maintenance staff to investigate the elevator apparatus and confirm that there is no abnormality, and then reset the position abnormality signal.

  However, in order to perform the work such as investigation and signal reset, it is necessary for maintenance personnel to go to the place where the elevator apparatus is installed, and the work there takes time, so the elevator apparatus is restored to normal operation. It will take a long time.

  In particular, after a large number of elevators have rescued passengers due to power outages in a wide area due to the Great East Japan Earthquake, etc., if the local power supply is restored, maintenance personnel must go to each installation location of each elevator system. If it cannot be restored to normal operation, a huge amount of time and man-hours are required for the restoration.

  Therefore, an object of the present invention is to provide a technique that enables an elevator apparatus in which a passenger is rescued by moving a passenger car to the nearest floor and quickly restored to normal operation.

  In order to solve the above-described problems, an elevator apparatus according to one aspect of the present invention enables a passenger to get on and off, a driving device that drives the car with electric power, and the car to be movable in an open state. A brake device that suppresses movement of the car in the activated state, a position detection device that detects a position of the car and outputs a position detection signal indicating the position, and the car based on the position detection signal. An elevator device having a control device that controls driving of the car by the driving machine and suppression of movement of the car by the brake device, a battery power source, a brake release switch, When the brake release switch is turned on, the brake device is released by the electric power from the battery power source, and the brake device is released. There, characterized by further comprising a, a brake opening control circuit that holds the status information indicating that open.

  According to one aspect of the present invention, after a passenger is rescued after moving a car to the nearest floor at the time of a power failure of an elevator apparatus, recovery can be quickly performed.

It is a block diagram which shows schematic structure of the electronic safety corresponding | compatible elevator apparatus by this embodiment. FIG. 2 is a circuit diagram of a brake release control circuit 1 and its peripheral circuits shown in FIG. 1. It is a flowchart which shows the outline of the rescue process with respect to a confinement accident, and a subsequent recovery process. It is a flowchart of the recovery process (step 107) shown in FIG. 5 is a flowchart of automatic recovery processing shown in FIG. 4.

  FIG. 1 is a block diagram showing a schematic configuration of an electronic safety-compatible elevator apparatus according to the present embodiment.

  Referring to FIG. 1, the elevator apparatus includes a hoist 1, a main rope 2, a car 3, a counter weight 4, electromagnetic brake devices 5A and 5B, a speed regulating rope 6, a governor 7, a governor encoder 8, and a position detection A shielding plate 9, a position detector 10, a brake release control circuit 11, a battery power source 12, a brake release switch 13, a safety microcomputer 14, and an elevator control microcomputer 15 are provided. The brake release control circuit 11, the battery power supply 12, the safety microcomputer 14, and the elevator control microcomputer 15 are included in the control device A.

  A main rope 2 is wound around the hoist 1, a car 3 is connected to one end of the main rope 2, and a counterweight 4 is connected to the other end of the main rope 2. When the hoisting machine 1 winds up the main rope 2, the car 3 and the counterweight 4 move in opposite directions in a slidable manner.

  The weight of the counterweight 4 is set so that the counterweight 4 is balanced with the car 3 in a state in which the car 3 is half the weight of the rated load. The hoisting machine 1 is provided with two electromagnetic brake devices 5A and 5B that allow the car 3 to move when it is opened and suppress the movement of the car 3 when it is activated. The electromagnetic brake devices 5A and 5B are in an open state while the brake release switch 13 is pressed, that is, while the brake release switch 13 is on. In a state where the electromagnetic brake devices 5A and 5B are opened, the car 3 moves either upward or downward by gravity due to unbalance with the counterweight 4 if no driving force is applied to the hoist 1. be able to.

  In a hoistway (not shown), there are a governor 7 around which an endless speed-controlling rope 6 stretched over the entire lifting stroke of the car 1 and a governor encoder 8 for measuring the rotation of the governor 7 are provided. Is provided. Along with the movement of the car 14, the governor 7 is rotated by the speed adjusting rope 6. A governor encoder 8 that is a rotary encoder outputs an encode signal corresponding to the rotation angle of the governor 7. This encoded signal is used as a speed detection signal for the car 14.

  A position detection shielding plate 9 is provided in the hoistway, and a position detector 10 that detects the position by detecting the position detection shielding plate 9 is attached to the car 3.

  The brake release control circuit 11 and the battery power source 12 are connected to the electromagnetic brake devices 5A and 5B, and when the brake release switch 13 is operated, the electromagnetic brake devices 5A and 5B can be operated through the brake release control circuit 11. It can be configured.

  As is generally known, the electromagnetic brake devices 5A and 5B are provided with a brake coil (not shown). The armature is driven by energizing the brake coil to be in a brake release state, while the brake coil is energized. When it is cut off, the brake is held by a spring.

  The elevator control microcomputer 15 is a microcomputer that executes processing for moving the car 3 to a desired floor. For example, in normal operation, the elevator control microcomputer 15 controls the hoist 1 to move the car 3 to a desired floor input by the passenger.

  The safety microcomputer 14 receives the speed detection signal from the governor encoder 8, the position detection signal from the position detector 10, and the operation signal from the brake release control circuit 11, and controls the elevator apparatus in cooperation with the elevator control microcomputer 15. The microcomputer to be executed. For example, when recovering from a power failure, the safety microcomputer 14 receives the operation signal from the brake release control circuit 11 and drives and controls the electromagnetic brake devices 5A and 5B via the elevator control microcomputer 15.

  FIG. 2 is a circuit diagram of the brake release control circuit 1 and its peripheral circuits shown in FIG.

  Referring to FIG. 2, a series connection body including a brake release switch 13 and a brake release means 16 is connected to the battery power source 12 in electrical parallel. The brake release means 16 is composed of a relay or the like, and is a circuit that opens the electromagnetic brake devices 5A and 5B when connected to the battery power source 12.

  Further, a series connection body composed of the contact point 17 and the brake coil 18 is electrically connected in parallel with the battery power source 12, and the other brake coil 19 is electrically connected in parallel with the brake coil 18. The brake coil 18 is a coil that constitutes one electromagnetic brake device 5 </ b> A that suppresses the rotation of the hoist 1. The brake coil 19 is a coil that constitutes the other electromagnetic brake device 5B that similarly suppresses the rotation of the hoist 1. The contact point 17 is a contact point for opening or operating the electromagnetic brake devices 5A and 5B in cooperation with the brake release means 16 in the brake release control circuit 11.

  The brake release keeping means 20 is electrically connected to the brake coil 19 in parallel. The brake release keeping means 20 is constituted by a relay or the like, and is a circuit that closes the contact 23 when connected to the battery power source 12.

  Further, a series connection body composed of the brake release reset means 21 and the reset output 22 in the safety microcomputer 14 is electrically connected in parallel with the battery power source 12. The reset output 22 is a circuit that transmits a reset signal output from the safety microcomputer 14. The brake release reset means 21 is configured by a relay or the like, and is a circuit that opens the contact 23 when the reset output 22 is output from the safety microcomputer 14.

  Further, a series connection body of the contact 23 and the brake release detection input 24 in the safety microcomputer 14 is connected to the battery power source 12 in electrical parallel. The brake release detection input 24 is a circuit that transmits an elevator return permission signal to the safety microcomputer.

  In the above configuration, when the brake release switch 13 is turned on, the brake release means 16 is connected to the battery power source 12 and excited. Then, the contact 17 of the brake releasing means 16 is closed, and the brake coil 18 in the electromagnetic brake device 5A and the brake coil 19 in the electromagnetic brake device 5B are connected to the battery power source 12.

  At this time, the brake release keep means 20 is excited, and the contact 23 of the brake release keep means 20 is closed. This contact 23 remains closed even when the brake release switch 13 is disconnected.

  Since the contact 23 is closed, the brake release detection input 24 is connected to the battery power supply 12, and a state information signal indicating that the electromagnetic brake devices 5 </ b> A and 5 </ b> B are released is taken into the safety microcomputer 14. This signal is a return permission signal indicating that the safety microcomputer 14 can restore the elevator apparatus.

  For example, the safety microcomputer 14 gives a reset output 22 to the brake release control circuit 11 after taking in a return permission signal. When the reset output 22 is given from the safety microcomputer 14, the brake release reset means 21 is connected to the battery power supply 12 and excited, and the contact 23 of the brake release keep means 20 is reset.

  FIG. 3 is a flowchart showing an outline of a rescue process for a confinement accident and a subsequent recovery process.

  For example, when the elevator apparatus stops due to a power failure and passengers are trapped in the car 3 (step 101), first, the maintenance staff goes to the site, performs necessary preparation work, and then turns on the brake release switch 13. Thus, the electromagnetic brake devices 5A and 5B are opened (step 102). When the electromagnetic brake devices 5A and 5B are released, the brake release keep means 20 is excited and the contact 23 is closed. As a result, the safety microcomputer 14 can take in a state information signal indicating that the electromagnetic brake devices 5A and 5B have been released.

  In addition, with the electromagnetic brake devices 5A and 5B opened, the maintenance staff applies a load to the main rope 2 in a direction that makes it easy to wind up due to the light weight relationship between the car 3 and the counterweight 4, and rides to a position where the passenger can be rescued. The car 3 is moved (step 103).

  When the car 3 moves to a position where the passenger can be rescued, the maintenance staff turns off the brake release switch 13 to operate the electromagnetic brake devices 5A and 5B to fix the car 3 (step 104). In this state, the maintenance staff rescues passengers in the car 3 (step 105).

  It is assumed that the above processing is performed during a power failure.

  Thereafter, when the power failure is resolved and the power supply is restored (step 106), a process for restoring the elevator apparatus to a normal operation (recovery process) is performed (step 107).

  FIG. 4 is a flowchart of the recovery process (step 107) shown in FIG. In the control device A, the safety microcomputer 14 and the elevator control microcomputer 15 cooperate to execute the restoration process.

  When power is restored, the safety microcomputer 14 first detects the current position of the car 3 (step 201). Subsequently, the safety microcomputer 14 determines whether or not the detected position of the car 3 matches the position of the car 3 on the data recognized before the power failure (step 202). If the detected position of the car 3 coincides with the position of the car 3 on the data recognized before the power failure, the normal car 3 position is recognized, so that the normal operation is started. (Step 203).

  On the other hand, if the detected position of the car 3 does not match the position of the car 3 on the data recognized before the power failure, the safety microcomputer 14 refers to the information indicated by the brake release detection input 24. Thus, it is determined whether or not there is a trace of opening the electromagnetic brake devices 5A and 5B (step 204). If the electromagnetic brake devices 5A and 5B have been released, a signal indicating this is held at the contact 23 of the brake release keep means 20, and the state information can be read from the brake release detection input 24. It is possible.

  If it is determined that the electromagnetic brake devices 5A and 5B have been opened, the control device A performs processing for automatically restoring the elevator device (automatic restoration processing, step 205), and the elevator device is shifted to normal operation. be able to. If the electromagnetic brake devices 5A and 5B have been opened, it is unusual that the detected position of the car 3 and the position of the car 3 on the data recognized before the power failure do not match. Because there is no. Details of the automatic recovery process will be described later.

  On the other hand, there is no evidence that the electromagnetic brake devices 5A and 5B are opened, but the detected position of the car 3 does not match the position of the car 3 on the data recognized before the power failure. Automatic recovery is not possible because there may be some abnormality. In that case, the safety microcomputer 14 outputs an alarm (step 206), and stops the operation of the elevator apparatus (step 207). As an example, the alarm output from the safety microcomputer 14 is notified to a management center (not shown). A maintenance worker goes to the site where the elevator device is installed, and manually conducts investigation and restoration work to restore the elevator device to a state in which it can normally operate.

  FIG. 5 is a flowchart of the automatic recovery process shown in FIG.

  The safety microcomputer 14 automatically operates the car 3 while acquiring the position detection signal from the position detector 10 and the speed detection signal from the governor encoder 8, and moves it to the reference floor (step 301).

  Furthermore, the safety microcomputer 14 acquires a position detection signal in a state where the car 3 is on the reference floor, and recognizes a reference for the normal position of the car 3 based on the acquired position detection signal (step 302). The normal position is the position of the car 3 based on the state on the reference floor. When the normal position reference is recognized, the safety microcomputer 14 gives a reset output 22 to the brake release control circuit 11. As a result, the brake release reset means 21 is connected to the battery power supply 12 and excited to reset the contact 23. Thereafter, the elevator control microcomputer 15 starts normal operation (step 303).

  These steps 301 to 303 are processes that can be automatically executed without requiring work by maintenance personnel. For this reason, the time required for the elevator apparatus to resume normal operation after the power supply is restored is shortened. If it is not possible to recognize that the electromagnetic brake devices 5A and 5B have been opened for rescue of passengers as in the past, the position of the car 3 detected when the power is restored is recognized before the power failure. When the position was different from position 3, it was judged that there was a possibility of abnormality, and the elevator apparatus had to be stopped. However, if it becomes possible to recognize that the electromagnetic brake devices 5A and 5B have been opened as in this embodiment, it is not due to an abnormality even if the position of the car 3 before the power failure and after the power return is different. Therefore, the elevator apparatus can be automatically returned. In particular, when passengers are rescued by a large number of elevators due to a power outage in a wide area due to a major earthquake, etc., and the power supply in that area is restored at the same time, maintenance personnel install each of the many elevators in the area. The advantage of being able to restore normal operation without going to a place is very large.

  As described above, the elevator apparatus according to this embodiment includes a car 3 that allows passengers to get on and off, a driving device (winding machine 1) that drives the car 3 with electric power, and a car 3 that is open. Brake device (electromagnetic brake devices 5A, 5B) that can move and suppress movement of the car 3 in the activated state, and a position detection device that detects the position of the car 3 and outputs a position detection signal indicating the position Based on the position detection shielding plate 9 and the position detector 10 and the position detection signal, the position of the car 3 is recognized, and the driving of the car 3 by the driving machine and the suppression of the movement of the car 3 by the brake device are suppressed. And a control device A for controlling. When the battery power source 12, the brake release switch 13, and the brake release switch 13 are turned on, the elevator device further releases the brake device by the electric power from the battery power source, and the brake device is released. And a brake release control circuit for holding information. When the car 3 is moved for rescue of passengers during a power failure, the brake release control circuit 11 holds the state information that the brake release switch 13 is turned on, so that the control device A recovers from the power failure. Referring to the status information, it is determined that there is no abnormality even if the current position of the car 3 detected by the position detection device does not match the position of the car 3 that was recognized when a power failure occurred. In addition, normal operation can be recovered without maintenance work being performed by the maintenance staff.

  Moreover, in the elevator apparatus of this embodiment, when recovering from a power failure, the controller A determines the current position of the car 3 detected by the position detection device and the position of the car 3 that was recognized when the power failure occurred. In comparison, if the two positions do not match, it is checked whether or not the brake release switch 13 has been turned on by referring to the state information. The control device A outputs an alarm if the brake release switch 13 is not turned on, and restores normal operation if the brake release switch 13 is turned on. When the position of the car 3 is different from that before the power failure, the controller A that has recovered from the power failure can easily determine whether there is an abnormality by referring to the state information.

  In the present embodiment, the control device A controls the drive device to move the car 3 to the reference floor when recovering normal operation, and the position detection device detects when the car 3 is on the reference floor. The reference position of the car 3 is set based on the position of the car 3 to be played. Since the information on the position of the car 3 detected by the position detection device is initialized with the car 3 placed on the reference floor, the information on the position of the car 3 is automatically generated without requiring any maintenance work. You can reset it to a normal value with.

  In the present embodiment, the control device A executes an elevator control microcomputer 15 that executes a process of moving the car 3 to a desired floor in a normal operation, and a process until the normal operation is restored after recovery from a power failure. And a safety microcomputer 14. Development, execution, and management by separating the development, execution, and management of processes with different characteristics of normal operation processing corresponding to passenger boarding and exiting and operation and processing for restoring normal operation after a power failure by separate microcomputers Convenience and reliability can be improved.

  In addition, it further includes a counterweight 4 that moves in the opposite direction to the car 3 as the car 3 moves, and a main rope 2 that connects the car 3 and the counterweight 4. The hoisting machine 1 is a hoisting machine 1 that winds up in the direction of 1. When the electromagnetic brake is released, the car 3 moves due to the weight difference between the car 3 and the counterweight 4. When the electromagnetic brake is released, the car 3 moves due to the weight difference between the car 3 and the counterweight 4, so that the car 3 can be easily moved even during a power failure.

  In addition, this invention is not limited to embodiment mentioned above, Various modifications are included. For example, 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.

DESCRIPTION OF SYMBOLS 1 ... Hoisting machine, 10 ... Position detector, 11 ... Brake release control circuit, 12 ... Battery power supply, 13 ... Brake release switch, 14 ... Safety microcomputer, 15 ... Elevator control microcomputer, 16 ... Brake release means, 17 ... Contact , 18 ... Brake coil, 19 ... Brake coil, 2 ... Main rope, 20 ... Brake release keep means, 21 ... Brake release reset means, 22 ... Reset output, 23 ... Contact, 24 ... Brake release detection input, 4 ... Counterweight DESCRIPTION OF SYMBOLS 5A ... Electromagnetic brake device, 5B ... Electromagnetic brake device, 6 ... Speed control rope, 7 ... Governor, 8 ... Governor encoder, 9 ... Position detection shielding plate

Claims (7)

A car that passengers can get on and off,
A driving device for driving the car with electric power;
A brake device that enables movement of the car in an open state and suppresses movement of the car in an activated state;
A position detection device that detects a position of the car and outputs a position detection signal indicating the position;
A controller for recognizing the position of the car based on the position detection signal and controlling the driving of the car by the driver and the suppression of movement of the car by the brake device;
In an elevator apparatus having
Battery power,
A brake release switch,
When the brake release switch is turned on, the brake device is released by power from the battery power source, and a brake release control circuit that holds state information indicating that the brake device is released;
The elevator apparatus further comprising: The elevator apparatus according to claim 1,
When recovering from a power failure, the control device
Comparing the current position of the car detected by the position detection device with the position of the car that was recognized when a power failure occurred;
Check whether the brake release switch is turned on by referring to the state information when the two positions do not match,
If the brake release switch is not turned on, an alarm is output,
If the brake release switch is turned on, normal operation is restored.
An elevator apparatus characterized by that. The elevator apparatus according to claim 2,
When the control device restores the normal operation,
Controlling the driving device to move the car to a reference floor;
Setting a reference position of the car based on the position of the car detected by the position detection device when the car is on the reference floor;
An elevator apparatus characterized by that. The elevator apparatus according to claim 2,
The controller is
An elevator control microcomputer that executes processing for moving the car to a desired floor in normal operation;
A safety microcomputer that executes processing until the normal operation is restored when recovering from a power failure,
An elevator apparatus characterized by that. The elevator apparatus according to claim 1,
A counterweight that moves in the opposite direction to the car as the car moves,
A main rope connecting the car and the counterweight;
The driving device is a hoisting machine that winds up the main rope in a desired direction;
The brake device is an electromagnetic brake attached to the hoisting machine,
When the electromagnetic brake is released, the car moves due to the weight difference between the car and the counterweight.
An elevator apparatus characterized by that. A car that passengers can get on and off,
A driving device for driving the car with electric power;
A brake device that enables movement of the car in an open state and suppresses movement of the car in an activated state;
A position detection device that detects a position of the car and outputs a position detection signal indicating the position;
A controller for recognizing the position of the car based on the position detection signal and controlling the driving of the car by the driver and the suppression of movement of the car by the brake device;
In an elevator apparatus control method for controlling an elevator apparatus having
The elevator apparatus is
Battery power,
A brake release switch,
A brake release control circuit that, when the brake release switch is turned on, releases the brake device with electric power from the battery power source and holds state information indicating that the brake device is released;
When recovering from a power outage,
Comparing the current position of the car detected by the position detection device with the position of the car that was recognized when the commercial power supply was stopped;
Check whether the brake release switch is turned on by referring to the state information when the two positions do not match,
If the brake release switch is not turned on, an alarm is output,
If the brake release switch is turned on, normal operation is restored.
The elevator apparatus control method characterized by the above-mentioned. When restoring the normal operation,
Controlling the driving device to move the car to a reference floor;
Setting a reference position of the car based on the position of the car detected by the position detection device when the car is on the reference floor;
The elevator apparatus control method according to claim 6.

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