JP6265057B2 - Elevator system - Google Patents

Description

  The present invention relates to an elevator system.

  Patent Document 1 discloses an elevator system in which a plurality of cars move up and down the same hoistway. In the system described in Patent Document 1, when the relative speed of the upper car directly above the lower car and the lower car exceeds the reference speed, the lower car or the upper car is decelerated. This avoids collision between the lower car and the upper car.

JP 2006-315796 A

In the system described in Patent Literature 1, there is a problem that appropriate control cannot be performed when the holding force of the brake device is reduced .

  The present invention has been made to solve the above-described problems. An object of the present invention is to provide an elevator system capable of performing appropriate control when the holding force of a brake device is reduced.

In the elevator system according to the present invention, the first car that moves up and down the hoistway, the brake device that generates a holding force for holding the first car stationary, the second car that moves up and down the hoistway, and the brake device A slip direction detecting means for detecting a direction in which the first car moves in a state where force is generated, and a second car is moved in a direction away from the first car based on the direction detected by the slip direction detecting means. The evacuation operation determination means for determining whether or not it is necessary to perform an evacuation operation for evacuating the person in the second car and the evacuation operation determination means determines that the evacuation operation is necessary. And an operation control means for controlling the evacuation operation .

  With the elevator system according to the present invention, appropriate control can be performed when the holding force of the brake device is reduced.

It is a figure which shows the structural example of the elevator system in Embodiment 1 of this invention. It is a figure for demonstrating an example of operation | movement of the elevator system in Embodiment 1 of this invention.

  The present invention will be described with reference to the accompanying drawings. The overlapping description will be simplified or omitted as appropriate. In each figure, the same reference numerals indicate the same or corresponding parts.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration example of an elevator system according to Embodiment 1 of the present invention.
The elevator system includes a plurality of cars. FIG. 1 shows a case where the present system includes a car 1 and a car 2 as the simplest example. The car 1 and the car 2 ascend and descend on the same hoistway 3. An elevator in which a plurality of cars are independently raised and lowered in the same hoistway is called a one-shaft multi-car elevator. This system can be applied to a system in which two or more cars move up and down the same hoistway.

  The car 1 moves up and down the hoistway 3 above the car 2. A notification device 4 is provided in the car 1. The notification device 4 notifies information to a person on the car 1. As the notification device 4, a display device that displays characters or the like can be employed. As the notification device 4, an announcement device that notifies information by voice may be adopted.

  A flooring device 6 is provided on the wall that defines the hoistway 3. The landing device 6 is disposed at the height of each landing 5 where the car 1 stops. The landing device 6 detects that the car 1 exists at a position where the door can be opened and closed. The landing device 6 may be constituted by the device provided on the wall and the device provided on the car 1. For example, a plate may be provided on the wall, and the presence of the plate may be detected by a sensor 6a provided on the car 1. The configuration of the landing device 6 is not limited to this.

  The driving device 7 drives the car 1. The car 1 is accelerated and decelerated by the driving device 7. The drive device 7 is composed of a hoist equipped with an electric motor and a drive sheave, for example. The car 1 is suspended from the hoistway 3 by a rope, for example. This rope is wound around a driving sheave. The electric motor generates a driving force for rotating the driving sheave. When the driving sheave rotates, the rope moves in a direction corresponding to the rotation direction of the driving sheave. That is, when the driving sheave is driven by the electric motor, the car 1 moves up and down the hoistway 3.

  The brake device 8 generates a holding force for holding the car 1 stationary. As described above, the car 1 is decelerated by the driving device 7. The brake device 8 generates a holding force when the car 1 stops at a landing 5 where the car 1 is located, and holds the car 1 at a height of the landing 5.

  The control device 9 controls equipment provided in the car 1, the drive device 7 and the brake device 8. The control device 9 includes a slip direction detection unit 10, a car position detection unit 11, an evacuation operation determination unit 12, and an operation control unit 13.

  The slip direction detector 10 detects the slip direction of the brake device 8. The sliding direction of the brake device 8 is a direction in which the car 1 moves in a state where the brake device 8 generates a holding force. The slip direction detector 10 basically does not detect the slip direction unless an abnormality has occurred in the brake device 8.

  The car position detector 11 detects the position of the car 1. The detection result of the landing device 6 is input to the control device 9. For example, the car position detection unit 11 detects the position of the car 1 based on the detection result of the landing device 6. When an encoder that generates a pulse according to the movement distance of the car 1 is provided, the car position detection unit 11 detects the position of the car 1 based on the pulse from the encoder. The car position detection unit 11 may detect the position of the car 1 based on both the detection result of the landing device 6 and the pulse from the encoder.

  The evacuation operation determination unit 12 determines whether or not the evacuation operation needs to be performed for the car 1. The evacuation operation includes an operation for avoiding the car 2 from colliding with the car 1 and an operation for evacuating a person on the car 1.

  The operation control unit 13 controls the operation of the car 1. For example, the operation control unit 13 controls normal operation for the car 1. The normal operation is an operation in which the car 1 sequentially responds to registered calls. The operation control unit 13 controls the evacuation operation for the car 1 as necessary.

  Each part shown by the code | symbol 10-13 shows the function which the control apparatus 9 has. The control device 9 includes a circuit including, for example, an input / output interface, a CPU, and a memory as hardware resources. The control device 9 implements the functions of the units 10 to 13 by executing a program stored in the memory by the CPU. You may implement | achieve part or all of the function which each part 10-13 has with hardware.

  The car 2 ascends and descends the hoistway 3 below the car 1. A notification device 14 is provided in the car 2. The notification device 14 notifies information to a person on the car 2. As the notification device 14, a display device that displays characters or the like can be employed. As the notification device 14, an announcement device that notifies information by voice may be adopted.

  The landing device 6 is also arranged at the height of each landing 5 where the car 2 stops. The landing device 6 detects that the car 2 exists at a position where the door can be opened and closed. The landing device 6 may be configured by a device provided on the wall that defines the hoistway 3 and a device provided in the car 2. For example, the presence of the plate provided on the wall may be detected by the sensor 6b provided in the car 2.

  The driving device 15 drives the car 2. The car 2 is accelerated and decelerated by the driving device 15. The drive device 15 includes a hoisting machine including an electric motor and a driving sheave, for example. The car 2 is suspended from the hoistway 3 by a rope, for example. This rope is wound around a driving sheave. The electric motor generates a driving force for rotating the driving sheave. When the driving sheave rotates, the rope moves in a direction corresponding to the rotation direction of the driving sheave. That is, when the driving sheave is driven by the electric motor, the car 2 moves up and down the hoistway 3.

  The brake device 16 generates a holding force for holding the car 2 stationary. As described above, the car 2 is decelerated by the driving device 15. The brake device 16 generates a holding force when the car 2 stops at a landing 5 where the car 2 is located, and holds the car 2 at a height of the landing 5.

  The control device 17 controls equipment provided in the car 2, the drive device 15 and the brake device 16. The control device 17 includes a slip direction detection unit 18, a car position detection unit 19, an evacuation operation determination unit 20, and an operation control unit 21.

  The slip direction detector 18 detects the slip direction of the brake device 16. The sliding direction of the brake device 16 is a direction in which the car 2 moves in a state where the brake device 16 generates a holding force. The slip direction detector 18 basically does not detect the slip direction unless an abnormality has occurred in the brake device 16.

  The car position detection unit 19 detects the position of the car 2. The detection result of the landing device 6 is input to the control device 17. For example, the car position detection unit 19 detects the position of the car 2 based on the detection result of the landing device 6. When an encoder that generates a pulse according to the movement distance of the car 2 is provided, the car position detection unit 19 detects the position of the car 2 based on the pulse from the encoder. The car position detection unit 19 may detect the position of the car 2 based on both the detection result of the landing device 6 and the pulse from the encoder.

  The evacuation operation determination unit 20 determines whether it is necessary to perform evacuation operation for the car 2. The evacuation operation includes an operation for avoiding the car 1 colliding with the car 2 and an operation for evacuating a person on the car 2.

  The operation control unit 21 controls the operation of the car 2. For example, the operation control unit 21 controls normal operation for the car 2. The normal operation is an operation in which the car 2 sequentially responds to registered calls. The operation control unit 21 controls the evacuation operation for the car 2 as necessary.

  Each part shown to the codes | symbols 18-21 shows the function which the control apparatus 17 has. The control device 17 includes a circuit including, for example, an input / output interface, a CPU, and a memory as hardware resources. The control device 17 implements the functions of the units 18 to 21 by executing a program stored in the memory by the CPU. You may implement | achieve part or all of the function which each part 18-21 has with hardware.

  Next, the operation of the elevator system will be described with reference to FIG. FIG. 2 is a diagram for explaining an example of the operation of the elevator system according to Embodiment 1 of the present invention. Specifically, FIG. 2 shows the control device 9 and the control device 17.

  In the following, a case where the holding force of the brake device 8 is reduced and the car 1 cannot be held stationary will be described. About operation | movement when the retention strength of the brake device 16 falls, since it can grasp | ascertain easily from the following description, the description is abbreviate | omitted. Note that the holding force of the brake device 8 is reduced by oil leakage or the like.

  The car 1 is driven by the driving device 7. For example, the car 1 is decelerated by the driving device 7 and stops at a certain landing 5. When the car 1 stops at the landing 5, the brake device 8 generates a holding force. Thereby, the car 1 is held stationary according to the height of the landing 5.

  When oil leakage occurs in the brake device 8, the holding force of the brake device 8 decreases. When the holding force of the brake device 8 decreases, the car 1 moves little by little upward or downward even in a state where the brake device 8 generates the holding force.

  When the car 1 moves while the brake device 8 is generating the holding force, the slip direction detection unit 10 specifies the moving direction. That is, the slip direction detection unit 10 detects the slip direction of the brake device 8. For example, the sliding direction detection unit 10 outputs the holding force of the brake device 8 when the operation command for the brake device 8 is output from the control device 9 and the position of the car 1 detected by the car position detection unit 11 is changed. Detecting a drop in When the slip direction detection unit 10 detects a decrease in the holding force of the brake device 8, the slip direction detection unit 10 specifies the slip direction of the brake device 8 based on the change in the position of the car 1 detected by the car position detection unit 11.

  When the slip direction of the brake device 8 is detected by the slip direction detection unit 10, the control device 9 transmits information on the detected slip direction to the control device 17.

  When the control device 17 receives the slip direction information from the control device 9, the evacuation operation determination unit 20 determines whether or not it is necessary to perform the evacuation operation for the car 2. The evacuation operation determination unit 20 performs the above determination based on the slip direction of the brake device 8 detected by the slip direction detection unit 10. For example, the evacuation operation determination unit 20 determines that the evacuation operation needs to be performed when the slip direction of the brake device 8 detected by the slip direction detection unit 10 matches the direction in which the car 1 approaches the car 2. To do.

  The operation control unit 21 controls the evacuation operation for the car 2 when the evacuation operation determination unit 20 determines that the evacuation operation needs to be performed.

  As an example of the evacuation operation, the operation control unit 21 moves the car 2 to the terminal floor in the direction away from the car 1. In the example shown in FIG. 1, the operation control unit 21 moves the car 2 to the lower terminal floor. When the operation control unit 21 stops the car 2 at the terminal floor, the operation control unit 21 opens the door of the car 2. In addition, the operation control unit 21 notifies the car 2 that an abnormality has occurred immediately after the start of the evacuation operation. This notification is performed using the notification device 14, for example. The notification may be performed immediately before the car 2 stops at the terminal floor. In addition, the notification may be performed after the car 2 stops at the terminal floor. By performing such an evacuation operation, the car 1 can be prevented from colliding with the car 2. A person in the car 2 can evacuate safely.

  As another example of the evacuation operation, the operation control unit 21 stops the car 2 at the nearest floor. When the operation control unit 21 stops the car 2 at the nearest floor, the operation control unit 21 opens the door of the car 2. In addition, the operation control unit 21 notifies the car 2 that an abnormality has occurred immediately after the start of the evacuation operation. This notification is performed using the notification device 14, for example. The notification may be performed immediately before the car 2 stops at the nearest floor. The notification may be made after the car 2 stops at the nearest floor. In order to prevent the car 1 from colliding with the car 2, the car 2 may be stopped at the nearest floor in a direction away from the car 1. Furthermore, the car 2 may be moved to the terminal floor in a direction away from the car 1 after the passengers are lowered on the nearest floor.

  If the evacuation operation determination unit 20 does not determine that the evacuation operation needs to be performed, the operation control unit 21 controls the normal operation for the car 2.

  The operation control unit 13 may perform necessary control when the slip direction of the brake device 8 is detected by the slip direction detection unit 10. For example, when the slip direction of the brake device 8 is detected, the operation control unit 13 controls the drive device 7 so that the car 1 does not move further in the detected slip direction. The driving control unit 13 may move the car 1 to the terminal floor in the direction away from the car 2 when the slipping direction of the brake device 8 is detected.

  If it is an elevator system which has the said structure, when the retention strength of a brake device falls, appropriate control can be performed. For example, even if oil leakage occurs in the brake device 8, the car 1 can be prevented from colliding with the car 2. In addition, people in the car 2 can be evacuated safely.

  In the above description, the evacuation operation determination unit 20 determines whether or not the evacuation operation is necessary based only on the slip direction of the brake device 8. The evacuation operation determination unit 20 may determine whether or not the evacuation operation needs to be performed in consideration of other information.

  For example, the control device 9 transmits information on the position of the car 1 detected by the car position detection unit 11 to the control device 17. In the control device 17, the evacuation operation determination unit 20 determines the car 1 and the car 2 based on the position of the car 1 detected by the car position detection unit 11 and the position of the car 2 detected by the car position detection unit 19. The distance is calculated.

  When the evacuation operation determination unit 20 receives the slip direction information from the control device 9, the evacuation operation determination unit 20 determines whether the evacuation operation is necessary based on the slip direction of the brake device 8 and the calculated distance. For example, in the evacuation operation determination unit 20, the slip direction of the brake device 8 detected by the slip direction detection unit 10 is a direction in which the car 1 approaches the car 2, and the calculated distance between the car 1 and the car 2 is greater than the reference distance. If it is short, it is determined that evacuation operation is necessary.

  If it is an elevator system which has the said structure, when the possibility that the car 1 will collide with the car 2 is low, it is possible to prevent the evacuation operation from being performed.

  1 car, 2 car, 3 hoistway, 4 notification device, 5 landing, 6 landing device, 7 drive device, 8 brake device, 9 control device, 10 slip direction detection unit, 11 car position detection unit, 12 evacuation operation determination Unit, 13 operation control unit, 14 notification device, 15 drive device, 16 brake device, 17 control device, 18 slip direction detection unit, 19 car position detection unit, 20 evacuation operation determination unit, 21 operation control unit

Claims (6)

The first car that goes up and down the hoistway,
A brake device for generating a holding force for holding the first car stationary;
A second car that moves up and down the hoistway,
Slip direction detecting means for detecting a direction in which the first car moves in a state where the brake device generates a holding force;
Based on the direction detected by the slip direction detecting means, it is necessary to move the second car in a direction away from the first car and to perform an evacuation operation for evacuating a person on the second car. Evacuation operation determination means for determining whether there is,
If it is determined by the evacuation operation determination means that it is necessary to perform the evacuation operation, the operation control means for controlling the evacuation operation,
Elevator system with Car position detecting means for detecting the position of the first car;
Further comprising
The evacuation operation determination means, the slip on the basis of the position detected by the detected direction and the car position detecting means by the direction detecting means, to claim 1 determines whether it is necessary to perform the evacuation operation The described elevator system. The evacuation operation determination means is calculated based on the direction detected by the slip direction detection means is a direction in which the first car approaches the second car and the position detected by the car position detection means. The elevator system according to claim 2, wherein when the distance between the first car and the second car is shorter than a reference distance, it is determined that the evacuation operation needs to be performed. It said operation control means, when it is determined by the evacuation operation determination means that it is necessary to perform the evacuation operation, opens the door to stop the second cage in the direction of the terminal landing away from the first cage And the elevator system as described in any one of Claim 1 to 3 which alert | reports in the said 2nd car that abnormality had generate | occur | produced. It said operation control means, when it is determined by the evacuation operation determination means that it is necessary to perform the evacuation operation, in that the second car is stopped on the nearest floor opens the door, and abnormality occurs the second informed in the car, the elevator system according to any one of claims 3 then the second car of claims 1 to Ru is stopped in the direction of the terminal landing away from the first basket. It said operation control means, when said it is necessary to perform the evacuation operation is not determined by the evacuation operation determination means, according to any one of claims 1 to 5 for controlling the normal operation for the second car Elevator system.

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