JP2006096510A - Elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator device capable of reducing a shock to be applied to a car when braking in an emergency. <P>SOLUTION: A hoistway 1 is provided with a motor 3 for generating the torque for elevating the car 8, a brake device 6 for generating braking force for braking elevation of the car 8, an encoder 18 for detecting speed of the car 8, and a control device 19 for controlling each of the motor 3 and the brake device 6 on the basis of information from the encoder 18. The control device 19 is structured to control the brake device to perform braking operation when braking in an emergency. Control of the motor 3 by the control device 19 when braking in an emergency is performed with a low level emergency control mode for stopping the generation of torque after operating brake in the case wherein speed of the car 8 is a low speed set value or less when starting emergency brake, and performed with a high level emergency control mode for stopping the generation of torque at the same time with braking operation in the case wherein the speed of the car 8 is larger than the low speed set value when starting emergency brake. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an elevator apparatus that raises and lowers a car by driving a motor.

  2. Description of the Related Art Conventionally, an elevator apparatus that brakes a brake wheel that is rotated integrally with a driving sheave with first and second electromagnetic brakes has been proposed in order to more reliably brake a car up and down. The drive sheave and the brake wheel are rotated by an electric motor. The first electromagnetic brake has a spring for generating a braking force and a first brake coil for releasing the braking force against the urging of the spring by power feeding. The second electromagnetic brake has a spring for generating a braking force and a second brake coil for releasing the braking force against the biasing of the spring by feeding.

  An energy absorption circuit is connected to the first and second brake coils so that the connection of the first and second brake coils to the DC bus is opposite in polarity when de-energized and energized. Thereby, the electric current of a brake coil can be attenuate | damped rapidly and a braking force can be made to act on a brake vehicle instantaneously (refer patent document 1).

JP 2003-292257 A

  However, since the rotational torque generated by the motor disappears at the same time as the power supply to the motor is stopped, if the power supply to the brake coil is stopped simultaneously with the motor during emergency braking, the rotational torque disappears before the braking force is generated. It will end up. Such a delay in the generation of the braking force causes a sudden change in the speed of the car.

  If the car is emergency braked when the speed of the car is sufficiently high, the delay in braking force generation is sufficiently small compared to the braking time of the car, so the impact on passengers in the car is small. On the other hand, for example, when the car is subjected to emergency braking when the car speed is sufficiently low just before stopping, even if the delay in the generation of the braking force is very small, the car speed is suddenly reduced from a state where the car is almost stopped. Will change, increasing the impact on passengers in the car.

  An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide an elevator apparatus that can reduce the impact on the car during emergency braking.

  An elevator apparatus according to the present invention includes a drive device for generating torque for raising and lowering a car, a brake device for generating braking force for braking the raising and lowering of the car, a car speed detecting unit for detecting the speed of the car, And a control device that controls each of the drive device and the brake device based on information from the car speed detection unit, and the control device controls the brake device to perform a braking operation that generates a braking force during emergency braking. The control of the drive device by the control device at the time of emergency braking is a low level that stops the generation of torque after the braking operation when the speed of the car is equal to or lower than a predetermined low speed set value at the time of emergency braking. When the emergency control mode is set and the speed of the car is higher than the low speed set value at the start of emergency braking, the high level emergency It is adapted to be with your mode.

  In the elevator apparatus according to the present invention, when the control of the drive device by the control device at the time of emergency braking is such that the speed of the car is equal to or less than a predetermined low speed set value at the time of emergency braking, the generation of torque is stopped after the braking operation. When the speed of the car is larger than the low speed set value at the start of emergency braking, it is set to the high level emergency control mode that stops the generation of torque simultaneously with the braking operation. When the speed of the car is low, it is possible to prevent a rapid change in the speed of the car from when the braking device starts a braking operation until the braking force is generated in the car by the torque of the driving device. Therefore, the impact on the car during emergency braking can be reduced.

Embodiment 1 FIG.
1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a hoisting machine 2 is provided at the upper part of the hoistway 1. The hoisting machine 2 includes a motor 3 that is a drive device, a drive sheave 4 and a brake wheel 5 that are integrally rotated by the motor 3, and a brake device 6 that brakes the rotation of the drive sheave 4 and the brake wheel 5. Have.

  A main rope 7 is wound around the drive sheave 4. A car 8 and a counterweight 9 are suspended from the main rope 7. The car 8 and the counterweight 9 are moved up and down in the hoistway 1 by the rotation of the drive sheave 4.

  The motor 3 generates torque that rotates the drive sheave 4 and the brake wheel 5 by supplying power to the motor 3. The car 8 and the counterweight 9 are raised and lowered in the hoistway 1 by the generation of torque of the motor 3. Further, the motor 3 is configured to stop the generation of torque when the power supply to the motor 3 is stopped.

  The brake device 6 biases the brake shoe 10 in a direction to be displaced to the braking position, and a brake shoe 10 that is displaceable between a braking position in contact with the braking wheel 5 and an opening position that is separated from the braking wheel 5. An urging spring 11 and a brake coil 12 for displacing the brake shoe 10 to the open position against the urging of the urging spring 11 are provided.

  The brake shoe 10 is displaced to the open position by the power supply to the brake coil 12 (release operation), and is displaced to the brake position by stopping the power supply to the brake coil 12 (braking operation). The rotation of the brake wheel 5 is braked by the displacement of the brake shoe 10 to the braking position. That is, the brake device 6 is braked by stopping power supply to the brake coil 12 to generate a braking force that brakes the raising and lowering of the car 8 and the counterweight 9. In addition, the brake device 6 is released by supplying power to the brake coil 12 and stops generating the braking force.

  Further, a governor sheave 13 that is a sheave is provided at the upper part of the hoistway 1, and a tension wheel 14 that is a sheave is provided at the lower part of the hoistway 1. A governor rope 15 that is moved together with the car 8 is wound between the governor sheave 13 and the tension wheel 14. The governor sheave 13 and the tension wheel 14 are rotated by the movement of the governor rope 15.

  The motor 3 is provided with a motor detection unit 16 for detecting whether the motor 3 is abnormal. In this example, the motor detection unit 16 detects the presence or absence of an abnormality in the motor 3 by detecting the presence or absence of an overcurrent to the motor 3. Further, the brake device 6 is provided with a brake detection unit 17 for detecting whether or not the brake shoe 10 is displaced to the braking position. Furthermore, the governor sheave 13 is provided with an encoder 18 that is a car speed detecting unit for detecting the speed of the car 8. The encoder 18 generates a pulse signal corresponding to the rotational speed of the governor sheave 13. The elevator state detection device for detecting the state of the elevator includes a motor detection unit 16, a brake detection unit 17, and an encoder 18.

  A control device 19 for controlling the operation of the elevator is provided in the hoistway 1. The control device 19 includes an abnormality determination unit 20 that determines the presence or absence of an abnormality in the elevator based on information from the elevator state detection device, and a car speed determination unit that determines the magnitude of the speed of the car 8 based on information from the encoder 18. 21, an elevator state determination unit 22 that determines the state of the elevator based on information from each of the abnormality determination unit 20 and the car speed determination unit 21, and a motor 3 and a brake device based on information from the elevator state determination unit 22 6 and a control unit 23 for controlling 6.

  The abnormality determination unit 20 outputs a normal signal to the elevator state determination unit 22 when the elevator is normal. Further, when detecting an abnormality in the elevator, the abnormality determination unit 20 outputs a motor abnormality signal to the elevator state determination unit 22 when the motor 3 has an abnormality and a normal abnormality signal when the device other than the motor 3 has an abnormality. It is supposed to be. The detection of the abnormality of the elevator by the abnormality determination unit 20 includes the door opening while the car 8 is traveling, the deviation of the actual stop position of the car 8 from the target stop position, and the action of the braking force on the traveling car 8. Etc.

  The car speed determination unit 21 is preset with a low speed set value that is a reference value for determining the speed of the car 8. The low speed set value is set based on the speed of the car 8 in a low speed state such as immediately before stopping or immediately after starting movement. The car speed determination unit 21 obtains the speed of the car 8 based on the pulse signal from the encoder 18, and obtains the car low speed signal when the obtained speed is equal to or lower than the low speed set value, and the obtained speed is greater than the low speed set value. Occasionally, a car high speed signal is output to the elevator state determination unit 22.

  The elevator state determination unit 22 performs normal mode determination based on the information from the abnormality determination unit 20 when no abnormality of the elevator is detected (that is, when the normality of the elevator is detected), and the abnormality of the elevator is detected. Emergency mode judgment is performed when

  The elevator state determination unit 22 outputs a normal mode signal to the control unit 23 when the normal mode determination is performed. Further, when the emergency mode determination is performed, the elevator state determination unit 22 outputs a low level emergency signal to the control unit 23 when both the normal abnormality signal and the car low speed signal are input, so that the motor abnormality signal and the car high speed are output. When at least one of the signals is input, a high level emergency signal is output to the control unit 23.

  When the normal mode signal is input to the control unit 23, the control unit 23 controls the motor 3 and the brake device 6 so as to perform normal operation (normal control mode). Further, when either the low level emergency signal or the high level emergency signal is input, the control unit 23 controls the motor 3 and the brake device 6 so as to emergency brake the rotation of the brake vehicle 5. Yes (emergency control mode).

  The controller 23 controls the brake device 6 so as to perform a braking operation for displacing the brake shoe 10 to the braking position during emergency braking. Further, the control of the motor 3 by the control unit 23 at the time of emergency braking is a low level emergency control mode in which power supply to the motor 3 is stopped after the braking operation of the brake device 6 when a low level emergency signal is input. When the high-level emergency signal is input, the high-level emergency control mode in which the power supply to the motor 3 is stopped simultaneously with the braking operation of the brake device 6 is set.

  In the low level emergency control mode, the control unit 23 detects the displacement of the brake shoe 10 to the braking position based on the information from the brake detection unit 17, that is, after the braking operation of the brake device 6 is completed, The power supply is stopped and the generation of torque is stopped.

  The control unit 23 is electrically connected to the motor 3 via an inverter 24 that is a motor driving device (frequency conversion device) that drives the motor 3 by changing a power supply frequency to the motor 3. The inverter 24 is mounted on the control device 19. The motor 3 is controlled by the control unit 23 via the inverter 24.

  Next, the operation will be described. FIG. 2 is a flowchart showing the operation of the control device 19 of FIG. In the figure, the abnormality determination unit 20 always determines whether there is an abnormality in the elevator. The elevator state determination unit 22 always recognizes whether or not there is an abnormality in the elevator based on information from the abnormality determination unit 20 (S1). When the elevator is normal, the elevator state determination unit 22 performs normal mode determination, and the control unit 23 performs normal operation of the elevator.

  When it is determined that there is an abnormality in the elevator, the abnormality determination unit 20 further determines whether there is an abnormality in the motor 3 based on information from the motor detection unit 16. In the elevator state determination unit 22, it is recognized from the information from the abnormality determination unit 20 whether or not the abnormality of the elevator is an abnormality of the motor 3 (S2). When the motor 3 is abnormal, a high level emergency signal is output from the elevator state determination unit 22 to the control unit 23.

  When the motor 3 is normal, the elevator state determination unit 22 recognizes from the information from the car speed determination unit 21 whether or not the speed of the car 8 is equal to or lower than the low speed set value ( S3). When it is recognized that the speed of the car 8 is greater than the low speed set value, a high level emergency signal is output from the elevator state determination unit 22 to the control unit 23. When it is recognized that the speed of the car 8 is equal to or lower than the low speed set value, a low level emergency signal is output from the elevator state determination unit 22 to the control unit 23.

  When the high level emergency signal is input to the control unit 23, the control of the control unit 23 is set to the high level emergency control mode. Thereby, the power supply to the motor 3 and the power supply to the brake coil 12 are stopped simultaneously, and the rotation of the drive sheave 4 is emergency braked (S4).

  When the low level emergency signal is input to the control unit 23, the control of the control unit 23 is set to the low level emergency control mode. In the low level emergency control mode, power supply to the brake coil 12 is first stopped under the control of the control unit 23 while power supply to the motor 3 is maintained (S5).

  Thereafter, the control unit 23 determines whether or not the completion of the braking operation of the brake device 6 has been detected based on the information from the brake detection unit 17 (S6). When the completion of the braking operation is not detected, the power supply to the motor 3 is maintained under the control of the control unit 23.

  The power supply to the motor 3 is stopped by the control of the control unit 23 when the completion of the braking operation is detected (S7). In this way, the rotation of the drive sheave 4 is emergency braked.

  In such an elevator apparatus, the control of the motor 3 by the control device 19 at the time of emergency braking is performed when the speed of the car 8 is equal to or lower than the low speed set value at the start of emergency braking and the motor 3 is normal. At least when the speed of the car 8 is higher than the low speed set value at the start of emergency braking and when the motor 3 is abnormal. When either one of them is in the high level emergency control mode in which the power supply to the motor 3 is stopped simultaneously with the braking operation of the brake device 6, the brake device 6 is braked when the speed of the car 8 is low. A sudden change in the speed of the car 8 from when the operation is started to when the braking force is generated in the car 8 can be prevented by the torque of the motor 3. Therefore, the impact on the car 8 during emergency braking can be reduced.

  Further, the control device 19 stops power supply to the motor 3 after detecting the completion of the braking operation of the brake device 6 based on the information from the brake detection unit 17. The speed change can be prevented more reliably, and the impact on the car 8 can be reduced more reliably.

  In the above example, the information from the motor detection unit 16 is used to select the low level emergency control mode and the high level emergency mode. However, the information about the speed of the car 8 is the low level emergency control mode. And the high-level emergency mode are selected, information from the motor detection unit 16 may not be used. In this case, the control of the motor 3 by the control device 19 at the time of emergency braking is such that when the speed of the car 8 is equal to or lower than the low speed set value at the start of emergency braking, the motor 3 When the speed of the car 8 is higher than the low speed set value at the start of emergency braking, the high level is set to stop power supply to the motor 3 simultaneously with the braking operation of the brake device 6. The emergency control mode is set. Even in this case, when the speed of the car 8 is low, the motor rapidly changes the speed of the car 8 after the braking device 6 starts the braking operation until the braking force is generated in the car 8. 3 to prevent the impact on the car 8 during emergency braking.

  Further, in the above example, when the abnormality of the elevator is determined by the abnormality determination unit 20, the control of the control device 19 is set to the emergency control mode regardless of whether the car 8 is traveling. However, after the abnormality determination unit 20 determines the abnormality of the elevator, the elevator state determination unit 22 may determine whether the car 8 is stopped based on information from the encoder 18. In this case, when it is determined that the car 8 is stopped, the motor 3 is controlled by the control unit 23 so as to keep the car 8 stopped, and when it is determined that the car 8 is traveling, the control device The control 19 is set to the emergency control mode.

  Further, in the low level emergency control mode, the power supply to the motor 3 is forcibly maintained when the power supply to the brake coil 12 is stopped in order to prevent the power supply to the motor 3 from being stopped simultaneously with the braking operation of the brake device 6. As described above, the controller 23 may output a motor power supply suspension command to the inverter 24.

Embodiment 2. FIG.
FIG. 3 is a block diagram showing an elevator apparatus according to Embodiment 2 of the present invention. In the figure, the car 8 has a car body 32 provided with a car doorway 31 and a pair of car doors 33 mounted on the car body 32 and capable of opening and closing the car doorway 31. The car body 32 is provided with a door driving device 34 that moves the door 33 of each car to open and close the car doorway 31.

  On each floor, a landing doorway 36 that communicates the inside of the hoistway 1 and the landing 35 is provided. Each floor is provided with a pair of landing doors 37 that can open and close the landing doorway 36. The landing door 37 is engaged with the car door 33 by an engaging device (not shown) when the car 8 stops at each floor. The doors 37 of the landings are moved together with the doors 33 of the cars by the engagement with the car doors 33 by the engaging device, and the landing doorway 36 is opened and closed.

  In the hoistway 1, there are a plurality of zone detectors that detect whether the car 8 is stopped in a boarding / exiting zone in which passengers in the car 8 can move to the landing 35 through the landing doorway 36 and the car doorway 31. A car detection sensor 38 is provided. When the car 8 is stopped in the boarding / alighting zone, the car door 33 is engaged with the landing door 37 by the engaging device. That is, when the car 8 is stopped in the boarding / alighting zone, the car doorway 31 and the hall doorway 36 can be opened and closed by the opening / closing operation of the car door 33 and the landing door 37.

  The car 8 is provided with a door control device 39 for controlling the door drive device 34 based on information from the control device 19 and the car detection sensor 38. The door control device 39 includes a door opening / closing determination unit 40 that determines whether the car 8 is stopped in the getting-on / off zone during emergency braking based on information from the elevator state determination unit 22 and the car detection sensor 38, and a door opening / closing determination unit. And a door drive control unit 41 that controls the door drive device 34 based on information from 40.

  The elevator state determination unit 22 outputs a normal signal to the door opening / closing determination unit 40 when a normal mode signal is output to the control unit 23, and outputs either a low level emergency signal or a high level emergency signal to the control unit 23. An emergency signal is output to the door opening / closing determination unit 40. When a normal signal is input to the door opening / closing determination unit 40, the door opening / closing determination unit 40 performs normal opening / closing mode determination. When the door opening / closing determination unit 40 performs the normal opening / closing mode determination, the door drive control unit 41 performs control during normal operation. When an emergency signal is input to the door opening / closing determination unit 40, the door opening / closing determination unit 40 performs door opening determination when the stop position of the car 8 is in the boarding / alighting zone, and the stop position of the car 8 is outside the boarding / alighting zone. If it is, the state maintenance determination is performed.

  The car 8 is provided with an announcement device 42 for providing information on emergency braking in the car 8 based on information from the door opening / closing determination unit 40. In this example, the announcement device 42 reports information on emergency braking into the car 8 by voice.

  The door open / close determination unit 40 outputs a door open signal to the door drive control unit 41 and the announcement device 42 when the door open determination is performed, and outputs a state maintenance signal to the door drive control unit 41 when the state maintenance determination is performed. It is designed to output.

  The door drive control unit 41 controls the door drive device 34 so that the car door 33 moves in the door open direction (so that the car doorway 31 opens) by the input of the door open signal, and by the input of the state maintenance signal. The door drive 34 is controlled so that the car doorway 31 is kept closed. In addition, the announcement device 42 is configured to report information for urging passengers to the car 8 by inputting a door open signal. Other configurations are the same as those in the first embodiment.

  Next, the operation will be described. FIG. 4 is a flowchart showing operations of the control device 19 and the door control device 39 of FIG. In the figure, the operation until the car 8 is stopped after emergency braking is the same as that in the first embodiment (S1 to S7). When the car 8 is stopped by emergency braking, the door open / close determination unit 40 recognizes whether the car 8 is in the getting-on / off zone based on information from the car detection sensor 38 (S8). When the car 8 is outside the boarding / alighting zone, a state maintenance signal is output from the door opening / closing determination unit 40 to the door drive control unit 41, and the car doorway 31 is closed by the control of the door drive device 34 by the door drive control unit 41. Maintained at.

  When the car 8 is in the boarding / alighting zone, a door open signal is output from the door open / close determination unit 40 to each of the door drive control unit 41 and the announcement device 42. After this, information that alerts passengers is reported into the car 8 by the announcement device 42 (S9). Further, the car door 33 is moved in the door opening direction together with the landing door 37 by the driving of the door driving device 34, and the car entrance 31 and the landing entrance 36 are both opened (S10). Thus, passengers in the car 8 can move to the landing 35 through the car doorway 31 and the hall doorway 36.

  In such an elevator apparatus, the door control device 39 controls the door driving device 34 so that the car door 33 moves in the door opening direction when the car 8 is stopped in the getting-on / off zone by emergency braking. Therefore, when the car is stopped in the boarding / alighting zone during emergency braking, the passengers trapped in the car 8 can be quickly guided to the landing 35.

  In addition, when the car 8 is stopped in the boarding / alighting zone by emergency braking, information for calling attention is reported to the car 8 by the announcement device 42, so that the car doorway 31 and the landing are made by emergency braking. The passengers in the car 8 can be informed of the presence of a step formed between the doorway 36 and the doorway 36.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the control apparatus of FIG. It is a block diagram which shows the elevator apparatus by Embodiment 2 of this invention. It is a flowchart which shows operation | movement of the control apparatus and door control apparatus of FIG.

Explanation of symbols

  3 motor (drive device), 6 brake device, 8 car, 16 motor detector (drive device detector), 17 brake detector, 18 encoder (car speed detector), 19 controller, 31 car doorway, 32 car body , 33 Car door, 34 Door drive device, 35 landing, 36 landing doorway, 38 Car detection unit sensor (zone detection unit), 39 Door control device, 42 Announcement device.

Claims (5)

A drive for generating torque to raise and lower the car,
A brake device for generating a braking force for braking the raising and lowering of the car,
A car speed detecting unit for detecting the speed of the car, and a control device for controlling each of the driving device and the brake device based on information from the car speed detecting unit,
The control device is configured to control the brake device so as to perform a braking operation that generates the braking force during emergency braking.
The control of the driving device by the control device at the time of emergency braking is such that the generation of the torque is stopped after the braking operation when the speed of the car is equal to or lower than a predetermined low speed set value at the start of the emergency braking. The level emergency control mode is set, and when the speed of the car is larger than the low speed set value at the start of the emergency braking, the high level emergency control mode in which the generation of the torque is stopped simultaneously with the braking operation. The elevator apparatus characterized by the above-mentioned. A drive for generating torque to raise and lower the car,
A brake device for generating a braking force for braking the raising and lowering of the car,
A car speed detector for detecting the speed of the car,
A drive device detection unit for detecting the presence or absence of abnormality of the drive device, and a control device for controlling each of the drive device and the brake device based on information from the car speed detection unit and the drive device detection unit; Prepared,
The control device is configured to control the brake device so as to perform a braking operation that generates the braking force during emergency braking.
The control of the driving device by the control device at the time of emergency braking is performed when the speed of the car is equal to or lower than a predetermined low speed set value at the start of the emergency braking and the braking operation is performed when the driving device is normal. The low-level emergency control mode in which the generation of the torque is stopped later is set, and at the time of starting the emergency braking, at least one of the case where the speed of the car is larger than the low speed set value and the case where the driving device is abnormal. In this case, the elevator apparatus is configured to be in a high level emergency control mode in which the generation of the torque is stopped simultaneously with the braking operation. A brake detection unit for detecting whether or not the braking operation is completed;
In the low level emergency control mode, the control device controls the drive device to stop the generation of the torque after detecting the completion of the braking operation based on the information from the brake detection unit. The elevator apparatus according to claim 1 or 2, wherein the elevator apparatus is configured. The car has a car body provided with a car doorway, and a car door provided in the car body and capable of opening and closing the car doorway.
A door driving device for moving the door of the car to open and close the car doorway;
A zone detection unit that detects whether or not the car is stopped in a boarding / alighting zone where passengers in the car can move to the landing through the landing doorway and the car doorway provided in the landing, and the zone detection unit And a door control device for controlling the door drive device based on information from the control device,
The door control device controls the door driving device so that the door of the car moves in the door opening direction when the car is stopped in the boarding / alighting zone by the emergency braking. The elevator apparatus in any one of Claims 1 thru | or 3 characterized by these.   An announcement device is further provided for providing information to call attention to the car when the car is stopped in the boarding / alighting zone by the emergency braking based on information from the door control device. The elevator apparatus according to claim 4.

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