JP2011136837A - Elevator system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure safety of a user when detecting abnormal condition by a brake diagnosis. <P>SOLUTION: A brake diagnostic system 12 indicates a landing hall call registering device 16 to prohibit an opening operation of a landing door of an elevator by a call button of a landing hall, and/or indicates an operation command control device 6 to prohibit operation, when detecting the abnormal condition in a brake as a result of diagnosing the brake, and allows a landing hall display device 17 to display operation stop of the elevator. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an elevator system.

  In general, an elevator needs to be held (stationary) against a certain load. Therefore, as a method of measuring the holding force of the elevator brake, a weight is placed in the elevator car, the amount of the weight at which the car starts to move, or the brake is forcibly activated while the elevator is running, A method for measuring a running distance until the elevator stops is known. Further, Patent Document 1 discloses a method of measuring a brake holding force by generating a torque in an elevator hoisting machine and monitoring a movement of a car due to the torque in a stopped state of an elevator that operates a brake. Is disclosed.

JP 2008-133306 A

  When the brake holding force is automatically measured and the brake diagnosis is performed while the elevator service is being provided, if the brake diagnosis is performed when the brake holding force is reduced, the brakes may not work and a dangerous state may occur. There is. In addition, it is very dangerous for the user to continue providing the elevator service after the brake holding force is reduced.

  Therefore, an object of the present invention is to provide an elevator system capable of ensuring the safety of an elevator user when an abnormality is detected by brake diagnosis.

  In order to achieve the above object, an aspect of an elevator system according to the present invention includes a diagnostic unit for diagnosing the state of an elevator brake, and when the diagnostic unit diagnoses that the elevator brake is in an abnormal state. And a prohibiting means for prohibiting the opening operation of the elevator door by the call button installed.

  In order to achieve the above object, another aspect of the elevator system according to the present invention includes a diagnosis unit that diagnoses the brake state of the elevator, and a case where the diagnosis unit diagnoses that the elevator brake is in an abnormal state. An operation stop means for stopping the operation of the elevator system, and when the diagnosis means diagnoses that the elevator brake is in an abnormal state, the elevator notifies the elevator that the operation is stopped. And an informing means installed.

  ADVANTAGE OF THE INVENTION According to this invention, when abnormality is detected by brake diagnosis, the elevator system which can ensure the safety | security of an elevator user can be provided by providing the means which blocks | prevents use of this elevator.

1 is a block diagram showing an embodiment of an elevator system according to the present invention. The figure which shows an example of a structure of the platform of the elevator in this embodiment. The flowchart which shows an example of the brake diagnosis process of the elevator system which concerns on this embodiment. The figure which shows an example of the platform display apparatus in this embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, an elevator system according to an aspect of the present invention includes a hoist 1, a rope 2, a car 3, a counterweight 4, a brake 5, an operation command control device 6, a speed control device 7, and a current control device 8. , Inverter 9, brake control device 10, brake diagnosis command control device 11, brake diagnosis device 12, load detection device 13, door closing detection device 14, landing call button 15, landing call registration device 16, landing display device 17, torque command It has a switching device 18, a resistor 19, a contactor 20, a current detector 21, a rotation detector 22, a car door 23 and a landing door 24. Here, for the sake of simplification, an elevator system including only one elevator will be described, but the present invention is not limited thereto.

  The car 3 moves between the floors of the building with a user on it. The counterweight 4 has a weight that balances when the car 3 is loaded with half of the maximum load capacity. The car 3 and the counterweight 4 have a pulley. The rope 2 fixed at both ends is wound around in order of a moving pulley attached to the car 3, a pulley of the hoist 1 fixed with a motor, and a moving pulley attached to the counterweight 4. Yes. As the hoisting machine 1 is driven, the car 3 moves in a sliding manner in the direction opposite to the counterweight 4 via the rope 2. The hoisting machine 1 is provided with a brake 5. The brake 5 operates based on an instruction from the brake control device 10 and stops the movement of the hoisting machine 1 caused by the weight difference between the car 3 and the weight 4 while the elevator is stopped. The rotation detector 22 attached to the hoisting machine 1 detects the rotation of the motor of the hoisting machine 1 and outputs the detection result to the operation command control device 6 and the brake diagnosis command control device 11.

  The car 3 includes a car door 23, a load detection device 13, and a door closing detection device 14. The car door 23 opens and closes when landing on each floor for the user to get on and off. The door closing detection device 14 detects the opening / closing of the car door 23 and outputs the detection result to the brake diagnosis command control device 11. The load detection device 13 detects whether or not the user has entered the car 3 by detecting the load in the car 3, and outputs the detection result to the brake diagnosis command control device 11.

  As shown in FIG. 2, a landing door 24 that engages with the car door 23 and opens and closes when the car 3 is landed is installed in the elevator landing on each floor. In addition, a landing call button 15 and a landing display device 17 are provided at the landing. The landing call button 15 is for the user to call the car 3 to the landing, and usually has up and down direction buttons for designating a destination direction. The landing call button 15 outputs an instruction to the landing call registration device 16 when receiving an instruction from the user. The landing display device 17 inputs information to be displayed from the landing call registration device 16 and displays it. The information displayed here includes, for example, the floor where the car 3 is currently located, the current traveling direction of the car 3, and the like.

  The landing call registration device 16 stores the signal input from the landing call button 15 and outputs it to the operation command control device 6. The landing call registration device 16 obtains information such as the current position of the car 3 from the operation command control device 6 and instructs the landing display device 17 to display the information as necessary.

  The operation command control device 6 controls the operation of the elevator. That is, the operation command control device 6 issues commands to the speed control device 7, the brake control device 10, and the brake diagnosis command control device 11, respectively. The speed control device 7 outputs a torque command for the car 3 to accelerate and decelerate and travel to the current control device 8 based on the command input from the operation command control device 6. The current control device 8 outputs power to the inverter 9 based on the command input from the speed control device 7. The inverter 9 outputs power to the motor winding of the hoisting machine 1 based on the power input from the current control device 8. The brake control device 10 outputs a release or braking operation command to the brake 5 based on the command input from the operation command control device 6. The torque command switching device 18 connects the speed control device 7 and the current control device 8 in normal times, and connects the brake diagnosis device 12 and the current control device 8 when performing brake diagnosis.

  The brake diagnosis command control device 11 instructs the brake diagnosis device 12 to start brake diagnosis when performing brake diagnosis. The brake diagnostic device 12 connects the brake diagnostic device 12 and the current control device 8 to the torque command switching device 18 in response to the brake diagnostic start command input from the brake diagnostic command control device 11, and the brake diagnostic device. A torque generation command from 12 is output to the current control device 8. Further, the brake diagnosis device 12 diagnoses whether or not the brake 5 is abnormal based on the signal input from the rotation detector 22, and operates the contactor 20 when diagnosing that the brake 5 is abnormal. Let In this case, the brake diagnosis device 12 outputs a command for prohibiting the door opening operation by the landing call button 15 to the landing call registration device 16, and further displays a message such as an elevator failure on the landing display device 17. The user is then instructed to display a warning so that the user is not on board. The contactor 20 is not normally conducted, but is switched to be conducted by the brake diagnostic device 12 when there is an abnormality in the brake. When the contactor 20 is conductive, the resistor 19 short-circuits the motor winding of the hoisting machine 1 and operates the dynamic brake. The current detector 21 detects the current output from the inverter 9 and feeds back the result to the inverter 9. The current detector 21 outputs the detection result to the brake diagnosis command control device 11.

  Next, the operation of the elevator system according to this embodiment will be described with reference to the drawings.

  When the user desires to use the elevator, the user designates a destination direction with the up and down direction buttons of the landing call button 15 at a landing as shown in FIG. The landing call button 15 acquires the user's request and outputs the signal to the landing call registration device 16. The landing call registration device 16 requests the driving command control device 6 to call the car 3 based on the signal input from the landing call button 15.

  The landing call registration device 16 always acquires the current position information and traveling direction of the car 3 from the driving command control device 6 and outputs them to the landing display device 17. The landing display device 17 displays the current position information and the traveling direction of the car 3 based on the information input from the landing call registration device 16.

  The operation command control device 6 commands the operation of the car 3 in response to the call request for the car 3 input from the landing call registration device 16. That is, the driving command control device 6 outputs a driving control signal to the speed control device 7 and the brake control device 10. During such normal operation, the torque command switching device 18 connects the speed control device 7 and the current control device 8 as described above.

  Based on the control signal input from the operation command control device 6, the speed control device 7 changes the current control device 8 to the current control device 8 via the torque command switching device 18 and changes the travel pattern for the car 3 to accelerate and decelerate. The torque command is output accordingly. The current control device 8 supplies power to the inverter 9 based on the torque command input from the speed control device 7. The inverter 9 supplies electric power to the motor winding of the hoisting machine 1 based on the electric power input from the current control device 8. At this time, the contactor 20 is opened, and the hoist 1 is driven by the electric power input from the inverter 9 to accelerate or decelerate the car 3.

  At the same time, the operation command control device 6 instructs the brake control device 10 to release the brake 5. The brake control device 10 outputs a release operation command to the brake 5 based on a command from the operation command control device 6. The brake 5 releases the brake based on the operation command input from the brake control device 10. On the other hand, when the car 3 has landed, the operation command control device 6 instructs the brake control device 10 to end the release of the brake 5. The brake control device 10 stops the release operation command to the brake 5 based on the command from the operation command control device 6. The brake 5 stops releasing the brake as the release operation command from the brake control device 10 stops.

  As described above, when the car 3 travels under the control of the operation command control device 6 and the car 3 is landed, the operation command control device 6 commands the opening of the car door 23. The car door 23 opens the door based on a command input from the operation command control device 6. At this time, the landing door 24 engages with the car door 23 and opens together with the car door 23.

  In addition, while performing the normal operation as described above, the brake diagnosis command control device 11 performs brake diagnosis when detecting that a certain time (for example, 6 hours) has elapsed from the previous brake diagnosis command. The operation of this brake diagnosis will be described with reference to the flowchart of FIG.

  That is, first in step S1, the brake diagnosis command control device 11 resets and starts a brake diagnosis start timer (not shown) provided in the brake diagnosis command control device 11. Then, when it is confirmed by the brake diagnosis start timer that the elevator is not operating for a certain time (for example, 5 minutes or more), an instruction to start brake diagnosis is output to the brake diagnosis device 12.

  In addition, the state where the elevator is not operating includes, for example, all the states where there is no load, the operation command is not output, the brake 5 is not released, the motor current is not detected, and the door is not operating. It is desirable to establish a state in which Hereinafter, a method for confirming each state will be described.

  The load detection device 13 is used for checking the unloaded state. The load detection device 13 detects the load amount of the car 3 and outputs it to the brake diagnosis command control device 11. The brake diagnosis command control device 11 compares the load amount of the car 3 input from the load detection device 13 with the no-load determination value. When the load amount of the car 3 is smaller than the above-described no-load determination value, it is determined that the car 3 is not loaded, and the brake diagnosis start timer is advanced. On the other hand, if the load amount of the car 3 is equal to or greater than the no-load determination value, it is determined that the user has entered the car 3, the progress time of the brake diagnosis start timer is reset, and it is determined again that there is no load. After that, the brake diagnosis start timer is restarted. In this manner, the brake diagnosis start timer is not reset unless the user gets on the car 3, so the brake diagnosis command control device 11 uses the brake diagnosis start timer to set the car for a certain period of time. 3 can be confirmed to be unloaded.

  In order to confirm the state in which the driving command is not output, the brake diagnosis command control device 11 acquires the driving command output from the driving command control device 6. If the driving command is not output from the driving command control device 6 and the off state continues, the brake diagnosis start timer is advanced. On the other hand, when a driving command is output from the driving command control device 6, the progress time of the brake diagnosis start timer is reset, and when the driving command is not output again, the brake diagnosis start timer is restarted. Start it. In this way, the brake diagnosis start timer is not reset unless the operation command is output from the operation command control device 6, so that the brake diagnosis command control device 11 uses the brake diagnosis start timer. It can be confirmed that the operation command is not output for a certain period of time.

  In order to confirm that the brake 5 is not released, the brake diagnosis command control device 11 acquires an operation command for releasing the brake 5 output from the brake control device 10. If the brake control device 10 does not output a release operation command, the brake diagnosis start timer is advanced. On the other hand, when an operation command for releasing the brake 5 is output from the brake control device 10, the progress time of the brake diagnosis start timer is reset, and the operation command for releasing the brake 5 is not output again from the brake control device 10. When the state is reached, the brake diagnosis start timer is restarted. In this manner, the brake diagnosis start timer is not reset unless the operation command for releasing the brake 5 is output from the brake control device 10. It can be confirmed by the diagnosis start timer that the brake 5 has not been released for a certain period of time.

  The current detector 21 is used for confirming the state where the motor current is not detected. The current detector 21 detects the current output from the inverter 9 and outputs it to the brake diagnosis command control device 11. The brake diagnosis command control device 11 compares the current output from the inverter 9 input from the current detector 21 with the no-current determination value. When the current output from the inverter 9 is smaller than the no-current determination value, it is determined that the motor current is not detected, and the brake diagnosis start timer is advanced. On the other hand, when the current output from the inverter 9 is equal to or greater than the no-current determination value, it is determined that the motor current has been detected, the progress time of the brake diagnosis start timer is reset, and the motor current is not detected again. If it is determined, the brake diagnosis start timer is restarted. In this way, the brake diagnosis start timer is not reset unless the current output from the inverter 9 is equal to or greater than the no-current determination value. It can be confirmed that the motor current is not detected for a certain time by the brake diagnosis start timer.

  The door closing detection device 14 is used to confirm that the door is not operating. The door closing detection device 14 detects that the car door 23 is closed and outputs a signal to the brake diagnosis command control device 11. The brake diagnosis command control device 11 evaluates the detection signal of the car door 23 input from the door closing detection device 14. When the brake diagnosis command control device 11 determines that the car door 23 is closed based on the detection signal from the door close detection device 14, the brake diagnosis start timer advances. On the other hand, if it is determined that the car door 23 is open based on the detection signal from the door closing detection device 14, the traveling time of the brake diagnosis start timer is reset, and if it is determined that the car door 23 is closed again. If so, the brake diagnosis start timer is restarted. In this way, the brake diagnosis start timer is not reset unless the detection signal indicating that the car door 23 is not closed is output from the door close detection device 14, so that the brake diagnosis command control device 11 is not reset. Can confirm that the car door 23 is closed for a predetermined time by the brake diagnosis start timer.

  As described above, when all of the no-load state, the operation command is not output, the brake is not released, the motor current is not detected, and the door is not operating, for a certain period of time or longer, The brake diagnosis command control device 11 outputs an instruction to start brake diagnosis to the brake diagnosis device 12. In addition, even if it is not confirmed that all of the no-loading state, the state where the operation command is not output, the state where the brake is not released, the state where the motor current is not detected, and the state where the door is not operating are continued, As a condition for the brake diagnosis command control device 11 to output a brake diagnosis start instruction to the brake diagnosis device 12 with one or more combinations of the above-described state checks sufficient to confirm that the elevator is not being used. good. The brake diagnosis device 12 starts brake diagnosis in response to a brake diagnosis start instruction input from the brake diagnosis command control device 11.

  Returning to FIG. 3, the description will be continued. In step S <b> 2, the brake diagnosis device 12 instructs the torque command switching device 18 to switch the connection path so that the brake diagnosis device 12 and the current control device 8 are connected. The current control device 8 connects the brake diagnosis device 12 and the current control device 8 based on an instruction input from the brake diagnosis device 12.

  In step S <b> 3, the brake diagnostic device 12 outputs a torque generation command for diagnosing the braking force to the current control device 8. The current control device 8 supplies power to the inverter 9 based on the command input from the brake diagnostic device 12. The inverter 9 supplies power to the motor windings of the hoisting machine 1 based on the power input from the current control device 8. At this time, the contactor 20 is opened, and the hoisting machine 1 is driven by the electric power supplied from the inverter 9 to generate torque for diagnosing the braking force. At this time, the operation command control device 6 does not output a command to drive the car 3. Therefore, the brake control device 10 does not output a command to release the brake 5, and the brake 5 tries to maintain a state in which the car 3 is stopped and held.

  In step S <b> 4, the brake diagnostic device 12 inputs the rotation status of the hoist 1 output from the rotation detector 22. Based on the signal input from the rotation detector 22, it is determined whether or not the brake is functioning normally. That is, when the hoisting machine 1 does not rotate, the brake diagnosis device 12 determines that the brake is normal, and proceeds to step S5. On the other hand, when the hoisting machine 1 is rotating, the brake diagnostic device 12 determines that the brake is abnormal, and proceeds to step S6.

  When it is determined that the brake is normal, the brake diagnosis device 12 instructs the torque command switching device 18 to switch the connection so that the speed control device 7 and the current control device 8 are connected in step S5. The torque command switching device 18 connects the speed control device 7 and the current control device 8 based on the command input from the brake diagnostic device 12, and ends the brake diagnostic processing.

  On the other hand, when it is determined that the brake is abnormal, the brake diagnosis device 12 stops the torque generation command to the current control device 8 in step S6. Further, the brake diagnosis device 12 instructs the operation command control device 6 to prohibit the operation command output of the elevator.

  In step S <b> 7, the brake diagnostic device 12 instructs the contactor 20 to be connected. The contactor 20 connects the contactor 20 based on the command input from the brake diagnostic device 12. As a result, the motor winding of the hoisting machine 1 is short-circuited through the resistor 19, and the dynamic brake operates. That is, since the motor winding of the hoisting machine 1 is short-circuited through the resistor 19, the hoisting machine 1 is in a power generation state and a braking force is generated. For this reason, even if the braking force of the brake 5 is lost and the hoisting machine 1 rotates, the acceleration force generated by the load difference between the counterweight 3 and the car 4 is reduced by the braking force. You can move safely at low speed to the end of the.

  In step S <b> 8, the brake diagnosis device 12 outputs a command for prohibiting the door opening by the landing call button 15 to the landing call registration device 16. The landing call registration device 16 stops the operation of the landing call button 15 based on the command input from the brake diagnosis device 12. As a result, the user is prevented from being placed on the elevator having a reduced braking force.

  In step S <b> 9, the brake diagnosis device 12 outputs a command to display a message indicating that the elevator has failed on the landing display device 17. The landing call registration device 16 causes the landing display device 17 to display a message indicating that the elevator is out of order based on the command input from the brake diagnosis device 12. For example, as shown in FIG. 4, it is conceivable to display contents prepared in advance. As a result, the user is prevented from being placed on the elevator having a reduced braking force.

  Thereafter, the process proceeds to step S5, where the torque command switching device 18 is switched so as to connect the speed control device 7 and the current control device 8, and the brake diagnosis process is terminated. Even if the torque command switching device 18 is switched in this way, since the operation command control device 6 is instructed to prohibit the operation command output of the elevator in step S6, the elevator is not operated.

  According to the elevator control apparatus according to the present embodiment as described above, it is possible to automatically execute a brake diagnosis at regular intervals during the operation of the elevator service and monitor the decrease in the brake holding force. If an abnormality is found in the brake holding force, the door opening operation by the elevator call button is prohibited, and a message indicating that the elevator is broken is displayed on the landing display device. This prevents the user from using the dangerous elevator. This ensures safety for the user. In addition, when there is an abnormality in the brake holding force, a message indicating that the elevator is broken can be displayed on the landing display device, so that the current state of the elevator can be communicated to the user. Can be suppressed. Then, the elevator administrator who sees the display can report the occurrence of a failure to the information center that centrally monitors the elevator, thereby allowing the brake to be inspected and repaired. In step S6, the operation command control device 6 is instructed to prohibit the output of the elevator operation command, and at the same time, an operation stop due to a brake abnormality may be automatically issued to the information center.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, the problem described in the column of problems to be solved by the invention can be solved and the effect of the invention can be obtained. The configuration in which this component is deleted can also be extracted as an invention.

  DESCRIPTION OF SYMBOLS 1 ... Hoisting machine, 2 ... Rope, 3 ... Car, 4 ... Balance weight, 5 ... Brake, 6 ... Operation command control device, 7 ... Speed control device, 8 ... Current control device, 9 ... Inverter, 10 ... Brake control Device: 11 ... Brake diagnosis command control device, 12 ... Brake diagnosis device, 13 ... Load detection device, 14 ... Door closing detection device, 15 ... Landing call button, 16 ... Landing call registration device, 17 ... Landing display device, 18 ... Torque command switching device, 19 ... resistor, 20 ... contactor, 21 ... current detector, 22 ... rotation detector, 23 ... car door, 24 ... landing door.

Claims (3)

Diagnostic means for diagnosing the state of the brakes of the elevator,
When the diagnosis means diagnoses that the elevator brake is in an abnormal state, a prohibition means for prohibiting the opening operation of the elevator door by a call button installed at a landing;
An elevator system comprising: When the diagnosis means diagnoses that the elevator brake is in an abnormal state, operation stop means for stopping the operation of the elevator,
When the diagnosis means diagnoses that the brake of the elevator is in an abnormal state, the notification means installed at the landing area notifies the elevator that the operation is stopped.
The elevator system according to claim 1, further comprising: Diagnostic means for diagnosing the state of the brakes of the elevator,
When the diagnosis means diagnoses that the elevator brake is in an abnormal state, operation stop means for stopping the operation of the elevator,
When the diagnosis means diagnoses that the brake of the elevator is in an abnormal state, the notification means installed at the landing area notifies the elevator that the operation is stopped.
An elevator system comprising:

Images