JP2013035625A - Device and method for controlling elevator door - Google Patents

Abstract

There is provided an elevator door control device capable of increasing the chances of removing foreign matter from a door sill groove in consideration of passenger safety.
When the number of reversals of door opening / closing due to overload detection exceeds a first predetermined number of times, a door speed command with a maximum speed lower than usual is given, and the time from overload detection to reversal operation Increase the chances of removing foreign matter. In addition, when the number of door reversals exceeds a second predetermined number that is greater than the first predetermined number, the door opening / closing operation is stopped, the door opening / closing button blinks, and the user is informed that the door cannot be opened or closed. And create opportunities for users to remove foreign matter.
[Selection] Figure 2

Description

  The present invention relates to an elevator door control device and a control method, and more particularly, to an elevator door control device and a control method corresponding to a door reversal caused by an overload during a door opening / closing operation.

  As a background art of this technical field, there is Patent Document 1. This publication discloses that when overload detection in the opening and closing of an elevator door is detected a predetermined number of times, the opening time is extended during the closing operation, and the closing time is extended during the opening operation. The elevator door opening / closing control has a function of inverting the opening / closing operation when an overload is detected on the assumption that a passenger is caught in the door. If a foreign object exists in the door sill groove, this prevents the door opening / closing operation, leading to overload detection, this function operates, and reversing operation, the reversing operation is repeated unless the foreign material in the sill groove is removed. It becomes. In Patent Document 1, the number of such repeated operations is counted, and when the predetermined number of times is reached, the opening / closing operation that cannot be completed by a foreign object is stopped.

  Patent Document 2 discloses that the door opening / closing motor driving force is increased when the opening / closing operation is repeated again after reversal due to overload. This is an attempt to remove the foreign matter by the motor driving force by increasing the door opening / closing motor driving force when the foreign matter is present in the door sill groove.

JP-A-1-285580 JP-A-9-309682

  When foreign objects are present in the elevator door sill groove and the door opening / closing operation is hindered, the conventional door opening / closing control has a method of increasing the motor driving force as a method of removing the foreign substances. Safety aspects such as passengers being caught during the increase are not considered.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator door control device and a control method capable of increasing the opportunity to remove foreign matter from a door sill groove in consideration of passenger safety.

  In a preferred embodiment of the present invention, an elevator door that opens and closes along a sill groove, a door opening and closing motor that generates a door opening and closing drive force, and an overload applied to the motor during the door opening and closing operation are detected. In an elevator door control device comprising an overload detection means and an opening / closing operation reversing means for reversing the door opening / closing operation when the overload detection state continues for a first predetermined time, the number of door opening / closing reversal operations due to overload detection is counted. The present invention is characterized by comprising an inversion speed counting means and an opening / closing speed reduction means for reducing the maximum opening / closing speed of the door when the number of door inversions by overload detection reaches a first predetermined number of times.

  In a preferred embodiment of the present invention, an overload applied to the motor is detected again during the door opening / closing operation after reducing the maximum door opening / closing speed, and this overload state is detected for the first predetermined time. And a second opening / closing operation reversing means for reversing the door opening / closing operation when a longer second predetermined time elapses.

  In a preferred embodiment of the present invention, when the door reversing operation due to further overload detection reaches a second predetermined number of times greater than the first predetermined number of times, the door opening / closing operation is stopped and the door opening / closing button is turned on. It is made to blink.

  According to a preferred embodiment of the present invention, in an elevator door opening / closing operation, after the operation is repeated a predetermined number of times, the door opening / closing speed is lowered to ensure safety against passenger pinching and overload. By increasing the time from the detection to the reversing operation, the door motor driving force can be transmitted to the foreign matter in the sill groove at a low speed for a longer time, and thus the possibility of removing the foreign matter can be increased.

  In addition, after the above operation, foreign matter removal is impossible and further reversal is repeated, the door opening / closing operation is stopped and the door opening / closing button blinks to inform the customer that the door opening / closing operation is impossible. Recognize. Thereby, the foreign substance removal operation | work by the user who recognized that the door opening / closing operation | movement was impossible is expectable.

  Other objects and features of the present invention will be clarified in the following description of embodiments.

It is a control block diagram of the elevator door control apparatus by one Example of this invention. It is a flowchart explaining the process of the door opening / closing control part at the time of the overload detection in the elevator door control apparatus by one Example of this invention.

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

  In the present embodiment, an example of door closing operation when foreign matter is mixed into the elevator door sill groove will be described.

  FIG. 1 is a control block diagram of an elevator door control apparatus according to an embodiment of the present invention.

  The computing unit 200 of the door opening / closing control device is a control function configured by a microcomputer.

  The elevator door 102 opens and closes along the door sill groove by the driving force generated by the door motor 101 attached to the car. The door motor 101 obtains a driving force by the motor current 313 from the door motor driving device 100. The door motor driving device 100 supplies a motor current 312 based on the motor current command value 305 from the current command value calculation unit 204 to the door motor 101. The motor current command value 305 is determined based on the torque command value 304 output from the door torque command value calculation unit 203.

  The door torque command value 304 is determined based on the door speed command value 303 of the door speed command value calculation unit 202 and the door speed feedback value 309 from the door motor speed detector 103 attached to the door motor 101. When the door speed command value 303 and the door speed feedback value 309 are different, door speed control is performed to increase or decrease the torque command value 304 in a direction in which the door speed feedback value 309 approaches the door speed command value 303.

  When the torque command value 304 is equal to or greater than a certain value during the execution of this control, the overload detection unit 208 detects overload. The purpose of this overload detection is to detect a state in which a foreign object is caught in the door and the door opening / closing operation is hindered. The above-described torque command value determined to be an overload detection is necessary for normal door operation. This is a torque command value corresponding to a door motor torque larger than the door motor torque.

  When the overload detection unit 208 detects an overload, an overload detection signal 310 is transmitted to the inversion command creation unit 207. When the overload detection signal 310 is received for a certain period of time, the reverse command creation unit 207 transmits the reverse command 306 to the door opening / closing command creation unit 201, the door speed command value calculation unit 202, and the door button blinking control unit 209. To do.

  The door speed command value 303 is triggered by the door opening command 301 or the door closing command 302 from the door opening / closing command creating unit 201, and the door position 308 calculated by the door position calculating unit 206 based on the door speed feedback value 309, and The door speed command value calculation unit 202 creates the number of inversions 307 from the inversion operation counter 205.

  The door open command 301 and the door close command 302 depend on the state of the elevator, the door open button press signal 315 from the door open button 105, the door close button press signal 313 from the door close button 104, the reverse command 306, and the reverse count 307. Thus, the door opening / closing command creation unit 201 determines.

  The door button blinking control unit 209 controls a blinking signal 311 for blinking the door opening button 105 in the elevator car and a door closing button blinking signal 312 according to the number of inversions 307. The door open button 105 receives the door open button blink signal 311 and blinks the door open button. The door close button 104 receives the door close button blink signal 312 and blinks the door close button.

  FIG. 2 is a flowchart for explaining processing of the door opening / closing control unit when an overload is detected in the elevator door control device according to the embodiment of the present invention. This figure shows only the door closing operation in order to avoid complication, and for the door opening operation, “close” and “open” are interchanged, and exactly the same processing is executed. Hereinafter, only the door closing operation when foreign matter is mixed in the elevator door sill groove will be described.

  First, in step 501, the door close command is turned on. At this time, since the determination of the count value of the number of inversions in step 502 is 0, the door closing operation is started in step 503. In step 504, before the door closing operation is completed, it is determined whether the door closing operation is hindered by a foreign object and an overload is detected. If an overload is detected and it is determined in step 505 that the overload detection state has continued for 120 [ms], in step 506, the door opening / closing reverse operation command is turned on. In step 507, the door open / close command creation unit 201 receives the reverse command and switches the door open command on. As a result, the door is opened at step 508.

  After the door opening operation is completed in step 509, in step 510, the reversal operation counter increments the number of reversals once.

  At this time, the number of inversions is confirmed in step 511, but since it is now 1, the process returns to step 501 to switch on the door close command.

  Thereafter, unless the foreign matter in the sill groove is removed, the operations of steps 501 to 511 are repeated 10 times.

  When the number of inversions is 10, the process branches to step 514 based on the determination in step 502, and the door closing operation is performed at a low speed. By lowering the maximum speed of the door closing operation, the safety of the customer against being caught in the door is increased.

  However, in step 515, if the door closing operation is blocked by a foreign object before the door closing operation is completed, an overload is detected. Then, if the overload detection state continues for 5 [s], for example, longer than the first predetermined time (for example, 120 [ms]) in step 505 described above, this is detected in step 516, In step 517, the door opening / closing reverse operation command is turned on.

  In this manner, by increasing the time from the overload detection to the reversal operation, the door motor driving force can be transmitted to the foreign material in the sill groove for a longer time, so the possibility of removing the foreign material increases.

  In response to the reversal operation command, the door open command is switched on in step 518. Then, in step 519, the door is opened at a low speed.

  Thereafter, unless the foreign matter in the sill groove is removed, the operations of steps 501, 502, 514 to 519, and 509 to 511 are repeated 10 times.

  If the number of inversions is 20, the process proceeds to step 512 by branching to step 511, the door is kept open, a door failure is determined, an alarm is issued to call maintenance personnel, and the door close button is pressed. Blink. By blinking the door close button, it can be expected that the user recognizes that the door opening / closing operation is impossible and that foreign matter is removed. Furthermore, in step 513, when the door closing button pressing continuation 5 [s] by the user is detected in the door open holding state, the process proceeds to step 501 to turn on the door closing command and try the door closing operation again. .

  In step 520, when the foreign matter in the sill groove is removed and the door closing operation is completed, the number of inversions is reset to 0 in step 521, and this process ends.

  As described above, the processing flow of the door closing operation is as described above. However, if all “open” and “closed” are rewritten in reverse, the processing flow of the door opening operation is obtained, and exactly the same processing can be executed.

  DESCRIPTION OF SYMBOLS 100 ... Door, 101 ... Door motor, 102 ... Motor drive device, 103 ... Speed detector, 104 ... Door close button, 105 ... Door open button, 200 ... Door opening / closing control apparatus calculating part, 201 ... Door opening / closing command preparation part, 202 DESCRIPTION OF SYMBOLS ... Door speed command value calculating part, 203 ... Door torque command value calculating part, 204 ... Current command value calculating part, 205 ... Reversing operation counter, 206 ... Door position calculating part, 207 ... Reverse command creating part, 208 ... Overload detecting part 209: Door button blink control unit 301 ... Door open command 302 ... Door close command 303 ... Door speed command value 304 ... Door torque command value 305 ... Motor current command value 306 ... Reverse operation command 307 ... Reverse Number of times: 308 ... Door position, 309 ... Door speed feedback value, 310 ... Overload detection signal, 311 ... Door open button blink signal, 312 ... Door close button blink signal, 313 ... Over data current, 314 ... door 閉釦 depression signal, 315 ... door Hirakibotan depression signal.

Claims (7)

An elevator door that opens and closes along the sill groove, a door opening and closing motor that generates a door opening and closing drive force, an overload detection means that detects an overload applied to the motor during the door opening and closing operation, and an overload detection In the elevator door control device provided with the opening / closing operation reversing means for reversing the door opening / closing operation when the state continues for the first predetermined time,
Reversal counting means for counting the number of door opening / closing reversal operations due to overload detection;
An elevator door control device comprising an opening / closing speed reducing means for reducing a maximum door opening / closing speed when the number of times of door reversal by overload detection reaches a first predetermined number of times.   The overload applied to the motor is detected again during the door opening / closing operation after the maximum door opening / closing speed has been reduced, and the overload state is longer than the first predetermined time. An elevator door control device comprising second opening / closing operation reversing means for inverting the door opening / closing operation when a predetermined time has elapsed.   3. The elevator door control device according to claim 1, wherein the door opening / closing operation is stopped when the number of times of reversing the door due to overload detection reaches a second predetermined number of times greater than the first predetermined number of times. .   4. The elevator door control device according to claim 3, wherein the door opening / closing button in the elevator car blinks when the number of times of door reversal by overload detection reaches the second predetermined number of times.   The elevator door control device according to claim 3 or 4, wherein when the number of times of door reversal due to overload detection reaches the second predetermined number of times, an alarm for calling a maintenance staff is issued.   6. The door open button or the door close button is continuously pressed for a predetermined time (5 s) or more after the number of times of reversing the door due to overload detection reaches the second predetermined number of times. The elevator door control device is characterized in that the door opening command or the door closing command is utilized to retry the door opening or closing operation. For an elevator door that opens and closes along the sill groove, a door opening / closing drive force is generated by a door opening / closing motor to detect an overload applied to the motor during the door opening / closing operation. In the elevator door control method for reversing the door opening and closing operation when the predetermined time continues,
Counting the number of door opening / closing inversion operations due to overload detection, and reducing the maximum door opening / closing speed when the number of door inversions reaches the first predetermined number of times, and reducing the maximum door opening / closing speed A second opening / closing operation that reverses the door opening / closing operation when an overload applied to the motor is detected again during the door opening / closing operation and the second predetermined time longer than the first predetermined time has passed. An elevator door control method comprising an operation reversal step.

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