Hitachi, Ltd.

Norihiko Mitsui

Masayuki Shigeta

Toshihiko Nara

Takayoshi Ito

Masatoshi Ohta

Isao Okubo

Rokuro Miyazaki

An elevator including a rope vibration suppressing device provided on the floor of a machinery room, on the top of a elevator cage or on the top portion of balancing weight means to prevent lateral vibration of ropes which may otherwise be produced when a building in which the elevator is equipped is laterally swung.

Elevator having rope guide means

A scaling device for weighing load applied on an elevator car floor to prevent overloading operated by detecting the amount of deformation of rubber insulators mounted under the car floor. Load detecting beams are provided under the car floor to detect the deformation of the rubber insulators, and each end of the load detecting beams is loosely jointed to an opposite side of the car floor. When the rubber insulators deform by the load applied on the floor, the load detecting means subside in conformity to the deformation of the rubber insulators and a load detecting switch mounted below the car floor is switched on by the subsidence of the load detecting beams as the load exceeds the rated load, thereby to stop the operation of the car.

Scaling device for an elevator car

A protection system for an automatically openable and closable door is provided in which an increase in the driving force produced when the door encounters with a blocking force in the opening operation as caused by some obstacles is detected to stop or reverse the door opening operation, thereby to suppress or reduce any possible accidents.

Growing community of inventors

Katsuta, Japan

Norihiko Mitsui