Hitachi, Ltd.

Hitachi Building Systems Engineering & Services Co., Ltd.

Seinosuke Yahiro

Kazuo Suzuki

Hiroyuki Kataoka

Masakatsu Tanaka

Jun Sugahara

Satoru Sasaki

An elevator apparatus having an easily mountable position detector and capable of detecting the position of a car with good precision. The apparatus has a position detector and a governor driven by a cable connected to an emergency stop device mounted on a car and capable of actuating the emergency stop device when the speed of the car has exceeded a prescribed speed, the position detector being driven by the governor, the apparatus includes a power transmission mechanism for causing rotation of the position detector at a speed higher than the speed of rotation of the governor.

Elevator apparatus

An elevator system is provided with a floor controller for controlling the speed of a car. One typical form of floor controller is composed of a synchronizer operated on a reduced scale in synchronism with the movement of an elevator car, an advancer which moves in advance of the synchronizer and stops when it detects a call, and a difference detector which moves in accordance with the relative distance between the synchronizer and the advancer for controlling the running speed of the elevator car in accordance with its own position. When a call is generated, the advancer must be driven in advance of the synchronizer in the direction selected by a direction selector separately provided. For this purpose, an electric motor for driving the advancer is provided, but it need not drive the advancer directly. Since any one of the synchronizer, the advancer or the difference detector moves in accordance with the difference between the distances covered by the travelling of the others, the advancer can be moved indirectly by driving the difference detector. This simplifies both the construction of the elevator system and the control of the advance motor.

Floor controller for an elevator

Growing community of inventors

Katsuta, Japan

Seinosuke Yahiro