Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Kenji Utsunomiya

Takashi Yumura

Kenichi Okamoto

Naotoshi Ito

Hiroshi Kigawa

Masayuki Sugahara

Masaya Kitazawa

A control device of an elevator door includes moving quantity detector which detects the moving quantity of a driving device of the door for opening and closing, and a driving force detector which detects a driving torque or driving force of the driving device. An equivalent stiffness calculator estimates the equivalent stiffness of an object in contact from an output signal of the moving quantity detector and an output signal of the driving force detector. The door is reversed or stopped by comparing the estimated equivalent stiffness of an object in contact as a contact determination parameter with a threshold value.

Control device of elevator door including obstruction detection using equivalent stiffness determination

A door engagement device for an elevator according to the present invention is configured in such a manner that biasing-force applying/changing means applies a turning preventing force for preventing turning of a lever main body and changes a direction of a biasing force to a direction of an anti-turning preventing force to the lever main body by action of turning guiding means with movement of a car door. Accordingly, an engagement-mechanism driving device can be driven with a reduced space at low cost.

Door engagement device for elevator

In an elevator apparatus, an actuator for generating a vibration-damping force against the lateral vibration of a car is provided in parallel to elastic member for preventing the lateral vibration of the car. The actuator is controlled by a vibration-damping control unit. The vibration-damping control unit estimates a natural frequency of the lateral vibration of the car, determines a gain value on the basis of the estimated natural frequency and a rigidity value of the elastic member, and drives the actuator in accordance with an instruction signal obtained by multiplication of the determined gain value.

Elevator apparatus having vibration damping control

A vibration damping system for an elevator is provided with a damping device () that is provided between a cab () and a car frame () for supporting the cab () and whose damping coefficient can be changed. A speed detector detects the traveling speed of a reference elevator car, and a calculation unit () receiving the traveling speed detected by the speed detector calculates a control signal for the damping device (), and outputs the control signal to the damping device. The calculation unit () controls the damping device () in such a way that, in the case where the traveling speed exceeds a predetermined value, the damping coefficient of the damping device () is larger than that in the case where the traveling speed is the same as or smaller than the predetermined value.

Elevator vibration damping system having damping control

A door device for an elevator includes an elevator door, first and second door drive devices having first and second rotating shafts, respectively, a power transmission mechanism that moves the elevator door according to rotation of the first and second rotating shafts, and a door control device that controls movement of the elevator door. The door control device includes a first processing device that performs first arithmetic processing for controlling the first door drive device, a second processing device that performs second arithmetic processing for controlling the second door drive device, and an information transmitting unit for information transmission between the first and second processing devices.

Door device for an elevator

In a vibration damping device for an elevator, an actuator for generating a vibration damping force acting on an elevator car is provided in parallel with a spring for urging a guide roller against a guide rail. The actuator is controlled by a controller. The controller determines the vibration damping force to be generated by the actuator based on information from a car frame acceleration sensor for detecting horizontal acceleration of a car frame and a car cage acceleration sensor for detecting horizontal acceleration of a car cage.

Vibration damping device for an elevator

An elevator vibration reducing device in which horizontal vibrations of a cage are detected by a vibration sensor. The cage is displaced horizontally by an actuator. A control portion for controlling the actuator has a computing portion for computing a vibration reduction control signal for reducing the horizontal vibrations of the cage based on a vibration detection signal generated by the vibration sensor. The control portion has a detection signal comparing portion for comparing a detection value obtained from the vibration detection signal with a previously set value, and stopping controlling of the actuator when the detection value becomes no less than the set value.

Active horizontal vibration reducing device for elevator

A guide device for an elevator in which a pair of corresponding actuators are controlled by controllers in accordance with information from acceleration sensors, and the force with which guide members are pressed against guide rails is adjusted. Each controller includes a current amplification device and diodes. The diodes selectively output signals from the current amplification device to the pair of actuators.

Guide for elevator

A vibration reduction apparatus for an elevator includes acceleration sensors for detecting vibrations of a elevator car, controllers for calculating forces to be applied to the elevator car, based an signals output by the acceleration sensors, and actuators for applying forces to the elevator car in accordance with the forces calculated by the controller. A dead band filter, which has a dead band region corresponding to noise level of the acceleration sensors, and an integrator, which integrates the signals output by the acceleration sensors after filtering by the dead band filter, are located in the acceleration sensors, or in the controllers, or between them.

Elevator vibration reduction apparatus including a dead band filter

In an elevator, guide devices are attached to the elevator and include a guide lever driven in a plane; a guide element attached to the guide lever; a stationary actuator part fixed to a support member; and a moving actuator part fixed to the guide lever, wherein a first part of the moving actuator part and the stationary section is a magnet that generates a magnetic field crossing a driving direction of the moving actuator part, a second part of the moving actuator part and the stationary section is a coil wound around a bobbin which is arranged so that it is influenced by the magnetic field and drives the movable section of the actuator in the driving direction of the movable section of the actuator. The magnetic field is generated by an electric current flowing in the coil when the elevator car is vibrated.

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Tokyo, Japan

Kenji Utsunomiya