JP2014040320A - Safety device of elevator and operation method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety device for a rescue operation preventing an artificial mistake and improving operability.SOLUTION: A safety device includes: a car 10, an operation controller 41 provided on a control panel 40 to control the operation of the car 10; a hoist brake 22 stopping the operation of the car 10; an emergency electric operation device 90 installed at each floor landing to rescue passengers during emergency stop of the car 10; a brake power supply opening/closing device; and a driving system power supply opening/closing device. The control panel 40 includes an electronic safety controller 42 inputting an operation state of an elevator 1 and an input signal of the emergency electric operation device 90 as input information so as to determine an abnormality and outputting a command signal to transfer the car 10 to a safety state. When the electronic safety controller 42 determines whether the car 10 enters a prescribed distance in relation to the floor landing on each floor, the electronic safety controller 42 notifies a floor on which the emergency electric operation device 90 is mounted of the determination and automatically stops the car 10 at the nearest floor.

Description

  The present invention relates to a safety device for an elevator in which a hoisting machine and a control panel are installed in a hoistway. When a passenger is trapped in a car due to a failure or the like, the rescue operation of the passenger is performed using an emergency electric driving device. At this time, the present invention relates to a safety device suitable for use in an elevator that performs safety control, and an elevator operation method using the safety device.

  Conventionally, elevators have been provided with various safety devices in order to ensure safe operation of the car. Each safety device is provided with a detection device that detects an abnormality in the car and an execution device that shifts the car to a safe state.

  The detection device detects whether the car is operating within a specified operating speed, or whether the car is within the operating range in the hoistway. As an example of the detection device, there are a final limit switch provided in a hoistway, a governor of a hoisting machine, an encoder attached to the governor for obtaining position information and speed information of a car, a door switch, and the like. The detection device notifies the controller when a car abnormality is detected.

  Then, the execution device executes a predetermined operation for shifting the car to a safe state in accordance with control from the controller. As an example of the execution device, there is an energization interrupting device that interrupts energization to the drive motor to stop the operation of the hoisting machine, an emergency stop device that connects to the car and stops the movement of the car directly. Conventionally, the controller based on the machine control is the mainstream, but in recent years, elevators equipped with the controller based on the electronic control are increasing.

  Under such circumstances, the elevator car may stop at the position below the lowermost floor or above the uppermost floor, that is, at the final limit switch operating position due to a failure or the like. At this time, the unbalance amount is insufficient due to the loading state of the car, and the car cannot be moved only by the rescue means by releasing the brake.

  In preparation for such cases, especially in machine room elevators where hoisting machines and control panels are installed in hoistways, operation invalidation means such as final limit switches and governors that enable passengers to be rescued more quickly than before In addition, an emergency electric driving device equipped with display means that shows the moving direction of the car, whether or not it has reached the unlocking zone, the speed, etc. is installed at the landing, and rescue work can also be performed by people other than experts by operating from outside the hoistway Safety equipment that can be used is prepared.

  For example, Patent Document 1 discloses an elevator control device that can control the moving speed of a car while moving the car by an operation of releasing a brake during an emergency rescue operation.

  Patent Document 2 discloses a technique for displaying a change in the position of a car on a speed indicator in the case of brake release during emergency of a slidable elevator.

JP 2011-195270 A JP 2002-160873 A

  The conventional safety device for rescue operation described in Patent Document 1 and Patent Document 2 described above relates to a case where the car speed exceeds the safe speed with respect to the work performed based on the judgment of the person performing the rescue operation. Met. Therefore, no measures are taken to smoothly correct overshooting of operations such as crossing over the nearest floor realignment zone or door unlocking zone due to incorrect operation or visual confirmation error, etc. There was a problem that the nature was bad.

  The present invention provides a car operated in a hoistway by a hoist driven by a motor connected to an AC power source, a control panel provided in the hoistway, and a car provided in the control board. Safety controller with hoisting machine brake that stops the operation of the car, emergency electric driving device that is installed at each floor landing and rescues passengers at the time of emergency stop of the car, hoisting machine brake Brake power switching device that controls the power supply to the motor, drive power switching device that controls the power supply from the AC power to the motor of the hoisting machine, and power for operation to the brake power switching device and the drive power switching device In an elevator safety device with a power supply that supplies power, the control panel determines the abnormality using the elevator operating status and the input signal of the emergency electric operation device as input information. An electronic safety controller is provided that outputs a command signal for shifting the car to a safe state. When the electronic safety controller determines whether or not the car has entered a predetermined distance from the landing floor of each floor, emergency electric operation is performed. The system is characterized by informing the floor to which the device is attached and automatically stopping the car at the nearest floor.

The present invention includes a car that operates in a hoistway by a hoist, a control panel provided in the hoistway, an operation controller that is provided in the control panel and controls the operation of the car, and the operation of the car. A safety device having a hoisting machine brake to be stopped, an emergency electric driving device that is installed at each floor landing and rescues passengers at the time of an emergency stop of a car, a brake power switching device, and an elevator having a drive system power switching device In safety devices,
The control panel is provided with an electronic safety controller that determines abnormality using the elevator operation state and the emergency electric operation device input signal as input information, and outputs a command signal to shift the car to a safe state. When it is determined whether or not the car has entered a predetermined distance from the landing floor of each floor, a notification is sent to the floor to which the emergency electric operation device is attached, and the car is automatically stopped at the nearest floor, so that the conventional method is used. Compared to the above, rapid operation and high safety can be ensured, and passengers confined in the car can be rescued at an early stage with less equipment configuration and simple means.

The schematic diagram which shows the whole structure of the elevator by one Embodiment of this invention. The block diagram which shows the relationship between the control panel of this invention, and the safety device of an elevator. The block diagram which shows the structure of the electronic safety controller of this invention. The schematic diagram explaining the unlocking zone of the present invention, the re-flooring zone, and the landing zone. The flowchart which shows the basic operation | movement in an electronic safety controller. The schematic diagram explaining the landing state of the car which concerns on one Embodiment of this invention. The schematic diagram explaining the landing state of the car which concerns on one Embodiment of this invention. The schematic diagram explaining the landing state of the car which concerns on one Embodiment of this invention. The schematic diagram explaining the landing state of the car which concerns on one Embodiment of this invention. The schematic diagram explaining the landing state of the car which concerns on one Embodiment of this invention. The schematic diagram explaining the landing state of the car which concerns on one Embodiment of this invention. The schematic diagram explaining the landing state of the car which concerns on one Embodiment of this invention. The schematic diagram explaining the landing state of the car which concerns on one Embodiment of this invention. The schematic diagram explaining the landing state of the car which concerns on one Embodiment of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Overall configuration of elevator]
FIG. 1 is a schematic diagram showing an overall configuration of an elevator 1 having a safety device according to an embodiment of the present invention. The elevator 1 shown in FIG. 1 includes a car 10, a hoisting machine 20, a main rope 30, an emergency electric operation device 90 for rescue of passengers, and a control panel 40. The control panel 40 operates to control the normal operation of the elevator. A controller 41 and an electronic safety controller 42 that controls emergency operation of the elevator are provided.

  The car 10 operates in the hoistway 50 by the driving force supplied from the motor 21 via the main rope 30.

  Inside the car 10, an in-car operation panel 11 and a car door switch 12 are provided. The in-car operation panel 11 includes an operation unit (not shown) for performing an operation for instructing the destination of the car 10 and opening / closing of the door, and a display unit (not shown) for displaying the destination, state, and the like of the car 10. The car door switch 12 is a switch that detects the opening / closing operation of the door of the car 10.

  An emergency stop device 13 and a position detection sensor 14 are provided outside the car 10. The emergency stop device 13 is fixed to the car 10 and suddenly stops the car 10 by sandwiching a rail in an emergency. The position detection sensor 14 senses the distance from the blocking plates 81 to 83 provided on each stop floor of the car 10.

  Further, final limit switches 51 and 52 are provided near the upper and lower ends of the hoistway 50 where the car 10 moves up and down. The final limit switches 51 and 52 are switches that are turned on to detect an abnormality when the car 10 exceeds a specified operation range.

  Further, a shock absorber 53 is provided at the lower end of the hoistway 50. When the car 10 cannot be stopped completely by the braking force of the hoisting machine 20 or the emergency stop device 13, the car 10 is directly contacted with the shock. The car 10 is stopped by physical absorption.

  In addition, on each floor where the elevator car 10 stops, landing door switches 64 to 66 for detecting opening and closing operations of the landing doors 61 to 63 and landing buttons 67 to 69 operated by a user of the elevator 1 are provided. It has been.

  The hoisting machine 20 supplies the driving force generated by the motor 21 to the main rope 30 to move the car 10 in the hoistway 50, and the motor 21, hoisting machine brake 22, inverter 23, cutoff circuit 24, An AC power supply 25 is provided.

  One end of the main rope 30 is connected to the car 10, and a counterweight 31 is connected in the vicinity of the other end. The route of the main rope 30 is constructed by a plurality of pulleys 33 to 35.

  Further, a governor rope 36 that is linked to the movement of the car 10 is connected to the car 10. The governor 37 is a speed governor that rotates according to the movement of the governor rope 36. The governor 37 includes a rotary encoder 38 and a gripping device 39 that grips the governor lobe 36. The path of the governor lobe 36 is established by the pulley 32.

  The rotary encoder 38 rotates with the rotation of the governor 37 and outputs a pulse signal to the electronic safety controller 42. Then, the electronic safety controller 42 can calculate the position and operation speed of the car 10 based on the change amount of the pulse signal.

  The control panel 40 of the elevator 1 includes an operation controller 41 and an electronic safety controller 42 that can operate independently of each other. The operation controller 41 mainly controls operations of mechanical parts and electronic parts of the safety device of the elevator 1.

  The electronic safety controller 42 electronically controls operations of various safety devices. The electronic safety controller 42 is realized by at least one microcontroller and a computer program, for example. Specifically, it may be realized by using two microcontrollers that mutually input and output signals and performing control while synchronizing.

  FIG. 2 is a block diagram showing the relationship between the control panel and the elevator safety device. Here, with reference to FIG. 2, the relationship between the control panel 40 and each part of the safety device of the elevator 1 is demonstrated. In FIG. 2, the motor 21 of the hoist 20 is supplied with electric power from an AC power source 25 via an inverter 23 to which a power circuit breaker 241 is connected. The shut-off circuit 24 includes a power circuit breaker 241 connected in series with each other, a driving system power switching device 242 that is opened and closed by the electronic safety controller 42, a driving system power switching device 243 that is opened and closed by the operation controller 41, and a power source 244. Have.

  The power circuit breaker 241 is operated by electric power supplied from the power source 244 via the driving system power switching device 242 and the driving system power switching device 243. As shown in FIG. 2, unless both the drive system switching device 242 and the drive system switching device 243 are in the closed state (AND condition), the power supply circuit breaker 241 is not energized.

  Here, as an example, it is assumed that the power breaker 241 is energized during normal operation of the safety device of the elevator 1. The power breaker 241 connects the AC power supply 25 and the inverter 23 in the energized state, and mediates power supply from the AC power supply 25 to the inverter 23. Further, the power breaker 241 opens the connection between the AC power supply 25 and the inverter 23 in a state where the energized state is released (shut-off state), and cuts off the power supply from the AC power supply 25 to the inverter 23.

  The power circuit breaker 241 may be mounted so as to open the AC power supply 25 and the inverter 23 in the energized state and connect the AC power supply 25 and the inverter 23 in the interrupted state.

  On the other hand, a hoisting machine brake 22 is provided in the vicinity of the motor 21. The hoisting machine brake 22 receives electric power from the power source 223 via a brake power switching device 221 that is opened and closed by an electronic safety controller 42 connected in series with each other and a brake power switching device 222 that is opened and closed by the operation controller 41. Supplied. As shown in FIG. 2, if both the brake opening / closing device 221 and the brake opening / closing device 222 are not closed (AND condition), the hoisting machine brake 22 is not energized. A single power source may be used for the power sources 223 and 244.

  Here, as an example, it is assumed that the hoisting machine brake 22 is energized during normal operation of the elevator safety device 1. The hoisting machine brake 22 maintains a state where the motor 21 is not braked in the energized state. Further, the hoisting machine brake 22 brakes the motor 21 in the shut-off state to reduce the rotation of the motor 21.

  The hoisting machine brake 22 may be configured to brake the motor 21 in the energized state and not to brake the motor 21 in the disconnected state. In such a case, the hoisting machine brake 22 is not energized during the normal operation of the elevator safety device 1 and is cut off.

  The operation controller 41 controls the driving force of the motor 21 supplied to the main rope 30 by controlling the power supplied from the AC power supply 25 to the motor 21 while exchanging signals with the inverter 23. Moreover, the operation controller 41 controls energization to the power circuit breaker 241 and the hoisting machine brake 22, respectively, by notifying the drive system opening / closing device 243 and the brake opening / closing device 222 of a control signal.

  The electronic safety controller 42 receives signals from the governor 37, the sensor group 260, the switch group 270, and the emergency electric operation device 90. The sensor group includes, for example, the position detection sensor 14 and the rotary encoder 38 shown in FIG. The switch group includes, for example, a car door switch 12, landing door switches 64 to 66, and final limit switches 51 and 52.

  The emergency electric driving device 90 is provided with at least buttons for moving the car, a display device for displaying the car moving direction, arrival at the unlocking zone, elevator speed, and the like, and a communication system with the car 10. It has been. The electronic safety controller 42 controls the energization to the power circuit breaker 241 and the hoisting machine brake 22 by notifying the drive system switching device 242 and the brake switching device 221 based on these input signals. In addition, the electronic safety controller 42 notifies the operation controller 41 of information indicating a control result by itself as log information.

  The electronic safety controller 42 is used in a situation in which users of the safety device of the elevator 1, luggage, etc. are rarely getting on and off and the frequency of re-flooring control is low, that is, from the start of the door opening to the completion of the door opening In addition, the execution of the re-flooring control is prohibited, and the operation test (hereinafter also referred to as device diagnosis) for the brake opening / closing device 221 and the drive system opening / closing device 242 is executed.

  FIG. 3 is a block diagram showing a configuration of the electronic safety controller shown in FIG. In FIG. 3, the electronic safety controller 42 is composed of a microcomputer having a computer program as described above, and is constructed on hardware and software.

  A signal from the emergency electric driving device 90 is temporarily stored in the temporary memory A 421 and input to the car position calculation unit 422. In addition, signals from the governor 37, the sensor group 260, and the switch group 270 are also input to the car position calculation unit 422. The car position calculation unit 422 calculates the current position of the car based on this information, and inputs the result to the zone determination unit 425 via the temporary memory A423. Based on a predetermined zone reference value 424 and the current position information of the car by the car position calculation unit 422 stored in the temporary memory 423, the zone determination unit 425 determines in which zone the car is currently located. In addition to notifying the operation controller 41 of the result, a control signal is notified to the brake opening / closing device 222 and the drive system opening / closing device 243 to control the opening / closing thereof.

  FIG. 4 is a schematic diagram for explaining each zone determined as a predetermined control range for each floor platform floor of the car 10. In FIG. 4, the unlocking zone 813 is generally set to 200 mm in the vertical direction within a range in which a door opening command can be issued.

  Next, the re-flooring zone 812 is worn when the landing doors and the car doors are opened for the purpose of preventing the risk of passengers falling when an error occurs between the floors of the floors and the car floors. This is a zone where the elevator can be lifted or lowered for floor or floor alignment. The re-flooring zone 812 is generally set within a range within 75 mm at the maximum in the vertical direction from the landing.

The landing zone 811 is a zone for landing the car 10 when the landing call and the destination floor call are served. The landing zone 811 is generally set within a range within 10 mm at the maximum in the vertical direction from the landing.
[Basic operation of electronic safety controller]
FIG. 5 is a flowchart showing the basic operation of the electronic safety controller 42 in the control panel 40 of the elevator according to the present embodiment.

  First, in step S401, the electronic safety controller 42 updates the input information input from the cab 37, the sensor group 260, and the switch group 270, and changes the state of the car 10 position based on the various input signals described above. Calculate.

  Next, in S402, the electronic safety controller 42 indicates the state of the car movement button in the emergency electric driving device 90 (having three states of an upward movement command, a downward movement command, and no movement command). Store in the temporary memory A421. Next, in S403, the electronic safety controller 42 stores the calculated car position in the temporary memory B423.

  By the processing shown in S404 and S405, the electronic safety controller 42 determines whether or not the car 10 is in the unlocking zone 813 in rescue of the passenger by the emergency electric driving device 90. If the electronic safety controller 42 determines that the car 10 is in the unlocking zone 813, the process proceeds to S406. On the other hand, if it is determined that the car 10 is not in the unlocking zone 813, the process jumps to S 412 to notify the display device in the emergency electric driving device 90 and buzzer based on the input information and the car position information. The process is terminated after performing the processes of S413 and S414 in preparation for the next activation.

  In the processing shown in S406 to S410, the electronic safety controller 42 moves the car 10 as it is despite entering the re-flooring zone 812 on the nearest floor due to, for example, an erroneous operation or a mistake in visual confirmation. It is determined whether or not. If it is determined that the car 10 is moved due to an operation error, the process proceeds to S411, and the electronic safety controller 42 outputs an instruction to stop the operation of the car 10 and passengers in the car 10 Announcement of getting off.

  In S410A, after the emergency stop of the car due to an operation error (previous emergency stop state), if the car movement command is still continued, the process jumps to S411 to maintain the car emergency stop state. .

Note that the processing in S401 to S414 may be realized at predetermined intervals (for example, 0.1 seconds) using a timer built in the microcomputer of the electronic safety controller 42. As described above, the electronic safety controller 42 can quickly detect an abnormality when the passenger in the car 10 is rescued by the emergency electric driving device.
[Example of the state of the car]
6A to 6I are schematic diagrams for explaining an example of a state of a car according to an embodiment of the present invention.

  FIG. 6A shows the case where the elevator car is moved to the lower floor, that is, down to the final limit switch operating position due to some trouble, etc., and stopped by the emergency electric driving device 90 due to the full capacity of the car. The case where it cannot rescue without using means is shown.

  FIG. 6B shows a case where a car is moved upward by an operator by a building manager, for example, in front of an emergency electric driving device 90 that can be operated by a person other than an expert to rescue a passenger (upper). Because it is moving in the direction, the display device in the emergency electric driving device 90 is notified of the upward direction and the remaining distance of the nearest floor).

  Next, FIGS. 6C to 6E show a state in which the floor surface of the car 10 moves to each zone (unlocking zone 813 → re-flooring zone 812 → landing zone 811).

  FIG. 6F shows a case where it has been confirmed that the car 10 has been moved to the position of the landing error 0 (zero) on the nearest floor, so that the upward car movement command is stopped and the passenger rescue is completed.

  The flow of FIG. 6E → 6G → 6H shows a case where the car 10 is urgently stopped when the re-flooring zone is excessively moved due to an error in confirming the moving distance of the car.

  In FIG. 6I, when the car 10 is stopped in the unlocking zone 813, but the door cannot be opened due to a failure of the landing door on the nearest floor, a command to move the car 10 upward again is issued. This is a state in which the car 10 is further moved upward, and passenger rescue is being attempted on another floor.

In addition, the switching timing of the car position in the emergency electric driving device is set when half of the floor pitch is passed. For example, if the floor pitch of the first floor and the second floor is 4 m, the system is the first floor when the car is in the range of 0 m to 2 m from the first floor, and the second floor if it is higher than that ( However, the case below the floor on the first floor: “1 _FL ”, the case above the floor on the top floor (eg, 16 floor): “16 _FL ”) is adopted.

DESCRIPTION OF SYMBOLS 1 Elevator 10 Ride car 12 Ride car door switch 14 Position detection sensor 20 Hoisting machine 21 Motor 22 Hoisting machine brake 221, 222 Brake power supply opening / closing device 223, 244 Power supply 24 Shutdown circuit 241 Power supply circuit breaker 242, 243 Driving system power supply opening / closing Device 25 AC power supply 38 Rotary encoder 40 Control panel 41 Operation controller 42 Electronic safety controller 50 Hoistway 51, 52 Final limit switch 53 Shock absorber 61-63 Landing door 64-64 Landing door switch 67-69 Landing button 421 Temporary memory A
422 Car position calculation unit 423 Temporary memory B
424 Zone reference value 425 Zone determination unit 811 Landing zone 812 Reflooring zone 813 Unlocking zone 90 Emergency electric operation device

Claims (10)

A car operated in a hoistway by a hoist driven by a motor connected to an AC power source, a control panel provided in the hoistway, and a control panel provided in the control panel for controlling the operation of the car A safety controller having a hoisting machine brake for stopping the operation of the car, an emergency electric driving device that is installed at each floor landing and rescues a passenger when the car is in an emergency stop, and the hoisting Brake power supply switching device for controlling power supply to the machine brake, drive system power switching device for controlling power supply from the AC power to the motor of the hoist, the brake power supply switching device, and the drive power supply In an elevator safety device having a power supply for supplying operating power to a switching device,
The control panel is provided with an electronic safety controller that determines an abnormality using the operation state of the elevator and the input signal of the emergency electric driving device as input information, and outputs a command signal for shifting the car to a safe state. When the safety controller determines whether or not the car has entered a predetermined distance from the landing floor of each floor, the safety controller notifies the floor to which the emergency electric driving device is attached, and automatically brings the car to the nearest floor. An elevator safety device characterized by stopping.   2. The elevator safety device according to claim 1, wherein the electronic safety controller includes a car position calculation unit that calculates a position of the car in the hoistway, and the car position is relative to the landing floor of each floor. An elevator safety device comprising: a zone determination unit for determining which region is located; and a zone reference value for a predetermined range based on the landing floor used for determination by the zone determination unit.   3. The elevator safety device according to claim 1, wherein the elevator operation state input information input to the electronic safety controller includes position sensor information related to the car in the elevator, and elevator information in the elevator. An elevator safety device comprising detection switch information including a door switch and a limit switch, and input information from the emergency electric driving device.   The elevator safety device according to claim 1 or 2, wherein the predetermined position is in an unlocking zone that enables a door opening command of the car on the nearest floor. .   The elevator safety device according to claim 1 or 2, wherein the predetermined position is in a re-flooring zone for raising and lowering the car in a door open state provided inside an unlocking zone on the nearest floor. An elevator safety device characterized by   The elevator safety device according to any one of claims 1 to 3, wherein a distance from the nearest floor to the landing level 0 (zero) is reported to the display device of the emergency electric operation device. Elevator safety device.   An elevator comprising the elevator safety device according to any one of claims 1 to 6. A car operated in a hoistway by a hoist driven by a motor connected to an AC power source, a control panel provided in the hoistway, and a control panel provided in the control panel for controlling the operation of the car A safety controller having a hoisting machine brake for stopping the operation of the car, an emergency electric driving device that is installed at each floor landing and rescues a passenger when the car is in an emergency stop, and the hoisting Brake power supply switching device for controlling power supply to the machine brake, drive system power switching device for controlling power supply from the AC power to the motor of the hoist, the brake power supply switching device, and the drive power supply In an elevator operation method having a power supply for supplying operating power to an opening / closing device,
When the car stops at a level below or above the top floor due to a malfunction, and the passenger is rescued from the car by the emergency electric driving device, the car is the door of the car on the nearest floor. When it is determined whether or not the vehicle has entered an unlocking zone that allows an opening command, the floor to which the emergency electric driving device is attached is notified, and the car is automatically stopped at the nearest floor. How to drive the elevator.   9. The elevator driving method according to claim 8, wherein the car has passed through a re-flooring zone where the car is moved up and down in a door open state provided inside the unlocking zone of the nearest floor due to a failure. When this is determined, the car is automatically stopped at the nearest floor by opening and closing the brake power supply switching device and the drive system power switching device, and the emergency power operating device is informed to the floor An elevator driving method characterized by the above.   The elevator driving method according to claim 8, characterized in that the elevator car is automatically moved to another floor for emergency stop by opening and closing the brake power switching device and the driving system power switching device. How to drive the elevator.

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