Otis Elevator Company

Meidensha Corporation

Nippon Otis Elevator Company

Ryuji Onoda

Takashi Takeuchi

Hirotomo Tanaka

Yusuke Watabe

Mitsuru Kato

Yoshiki Nota

Makoto Niwakawa

Kazuaki Chida

An elevator rope monitoring device, provided with: line sensor camerasfor imaging the entire circumference of the traveling elevator ropea speed/position detecting devicefor detecting the traveling speed and traveling position of the elevator ropean image recording partfor inputting the image acquired by the line sensor camerasin association with the traveling position of the elevator ropedetected by the speed/position detecting meansan image creating partfor creating an entire circumferential image of the elevator ropefrom the image imaged by the line sensor camerasand an image processing partfor detecting an abnormality in the elevator ropeby analyzing the entire circumferential image.

Elevator rope monitoring device and elevator rope monitoring method

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

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

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Chiba, Japan

Ryuji Onoda