Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Yoshitaka Kariya

Takaharu Ueda

Rikio Kondo

Masunori Shibata

Masahiko Hida

Masaya Sakai

An elevator apparatus includes: a traction machine including a sheave around which a middle portion of a main rope from which a car and counterweight are suspended is wound; a controller configured to control travel of the car; a section specification unit configured to specify a determination target section serving as a travel section, including at least a travel position of the car, satisfying a predetermined determination execution condition; a sheave rotation detector configured to detect a sheave rotation amount; and a determinator configured to determine traction performance of the sheave based on the sheave rotation amount detected during travel of the car in the determination target section. The determination execution condition is to have a load weight and an acceleration of the car that cause direction of an acceleration vector of one of a car side and a counterweight side heavier than the other to match an ascent direction.

Growing community of inventors

Tokyo, Japan

Yoshitaka Kariya