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Elevator door control device

A technology for door control, elevators, elevators, transportation and packaging, elevators, etc. in buildings, which can solve problems such as lack of reliability, incorrect operation of position detectors, and increased number of parts

Active Publication Date: 2011-04-06
TOSHIBA ELEVATOR KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned Patent Document 1, the displacement of the door is detected by a specific device, so there is a problem that the number of redundant parts increases and the cost increases.
In addition, there is a possibility that the position detector works incorrectly, and there are also problems of lack of reliability, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0022] Fig. 1 is a block diagram showing the configuration of an elevator door control device according to a first embodiment of the present invention. In addition, 1 in the figure denotes a subtractor, 2 denotes a subtractor, and 3 denotes an adder.

[0023] A car door (door panel) 10 of an elevator is opened and closed by a door driving motor 11 . The output signal of the pulse coder 12 provided in this door drive motor 11 is converted into a motor speed by the motor speed calculation part 13, and is fed back to a speed control system.

[0024] The speed command output unit 14 outputs a speed command value Vref based on a preset target speed. The speed control unit 15 outputs a torque command value Tsp for the door driving motor 11 based on a speed deviation signal between the motor actual speed Vm output from the motor speed calculation unit 13 and the speed command value Vref output from the speed command output unit 14 . The torque output switching unit 16 outputs a cur...

no. 2 approach

[0042] Next, a second embodiment of the present invention will be described.

[0043] In the first embodiment described above, the increasing torque T1 is a constant value, but in the second embodiment, the value of the increasing torque T1 is variably controlled according to the amount of change in the current phase θ. In addition, the overall configuration of the device is the same as that in FIG. 1 of the above-mentioned first embodiment, so only the different parts will be described here.

[0044] Figure 5It is a block diagram partially showing the configuration of the elevator door control device according to the second embodiment of the present invention. In the second embodiment, the torque command changing unit 21 is composed of a subtractor 32 , a holding torque control unit 33 and a torque limiter 34 .

[0045] The subtractor 32 outputs a deviation signal between the reference value θref and the current phase θ. The holding torque control unit 33 controls the val...

no. 3 approach

[0054] Next, a third embodiment of the present invention will be described.

[0055] The third embodiment is characterized in that the reference value θref of the current phase is variably controlled in accordance with minute fluctuations in the current phase θ. In addition, the overall configuration of the device is the same as that in FIG. 1 of the above-mentioned first embodiment, so only different parts will be described.

[0056] Figure 7 It is a block diagram partially showing the configuration of an elevator door control device according to a third embodiment of the present invention. The difference from the configuration in FIG. 1 of the first embodiment described above is that a current phase reference changing unit 35 is added.

[0057] This current phase reference changing unit 35 receives the door zone outside signal ODZ turned on outside the parking zone and the current phase θ output from the current phase detection unit 20 as inputs, based on the change of th...

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PUM

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Abstract

The present invention provides a door control device of elevator, which detects a current phase (theta) of a motor (11) for driving the door with a current phase detecting part (20) at a state that a cage door (10) is fixed to a fixed position. A torque instruction alternating part (21) determines the state of the displacement of the cage door (10) according to the variation of the current phase (theta) detected by the current phase detecting part (20), thereby outputting the increased torque (T1) to control the holding torque instruction (Tref) of the motor (11) for driving the door.

Description

technical field [0001] The present invention relates to a door control device for controlling the opening and closing operation of car doors (doors on the car side) of an elevator. Background technique [0002] In the elevator, a certain holding torque is applied to the door closing direction so that the car door does not open during operation. However, when a strong force is applied in the door opening direction due to mischief or an earthquake, the door may be opened against the above-mentioned holding torque. There is a door fully closed detection switch near the door closing end of the car door. If it is opened to the position of the switch, the elevator will stop in an emergency, and an accident will occur that passengers will be locked in the car. [0003] Here, it is considered to increase the holding torque so that the door does not simply open. However, if the holding torque is increased, there will be problems such as increasing the electric power and causing a l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B13/14B66B5/02
Inventor 渡边尚央
Owner TOSHIBA ELEVATOR KK