Otis Elevator Company

Meidensha Corporation

Nippon Otis Elevator Company

Yoshiki Nota

Yusuke Watabe

Mitsuru Kato

Takashi Takeuchi

Hirotomo Tanaka

Ryuji Onoda

Hideki Miyazawa

Kazuaki Chida

Hideki Miyazama

During a maintenance inspection, an optical rope diameter measuring device is provided at a predetermined position along a path of a wire rope, rope diameter is measured at multiple measuring points while the elevator is driven in test mode, and diameter reduction at each measuring point is determined and stored as a first diameter reduction (S_S). During a subsequent maintenance inspection, rope diameter is similarly measured at each measuring point to determine diameter reduction constituting a second diameter reduction (S_S). Based on these two diameter reductions, the time at which diameter reduction will reach a predetermined threshold value is predicted for each measuring point, and the earliest time is displayed as a rope replacement time (S_S).

Elevator rope maintenance method

An elevator rope elongation measuring device provided with: a camera for photographing one or a plurality of elevator ropes R; and an image processing unit for image processing a photographed image output from the camera, wherein: the image processing unit detects an external form portion of the elevator rope R as a regular hill and valley shape T, converts a cyclic length of the hill and valley shape into actual dimensions and makes this a measured value, and finds a ratio of the measured value with respect to a standard value prescribed for the elevator rope as an elongation, therefore attaining the effect of making it unnecessary to have a preliminary installation of a sensor or marker to the rope, or preliminary creation of a database.

Elevator rope elongation measuring device

A wired-rope measuring device, provided with two camerasthat shoot one or no less than two wired ropesfrom different directions and an analyzing devicethat analyzes image data that is an image shot by the two cameras, wherein the analyzing deviceapplies the principle of triangulation by a stereo method to the image data to seek a center coordinate Pof the wired roperelative to the camerasand volumetric anamorphosis is corrected when calculating a diameter D of the wired ropebased on the center coordinate Pof the wired rope

Wire rope measuring device and wire rope measuring method

Growing community of inventors

Tokyo, Japan

Yoshiki Nota