The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 2019
Filed:
Feb. 18, 2015
Mitsubishi Electric Corporation, Chiyoda-ku, JP;
Masahiko Hida, Tokyo, JP;
Mitsubishi Electric Corporation, Chiyoda-ku, JP;
Abstract
An elevator diagnosing device includes a hoisting machine including a sheave, around which a middle portion of a main rope suspending an elevator car is wound, and a controller controlling travel of the elevator car by controlling operation of the hoisting machine. The controller includes a car controller performing first travel control causing the elevator car to travel at a first acceleration/deceleration and second travel control causing the elevator car to travel at a second acceleration/deceleration less than the first acceleration/deceleration, a rope feed amount difference detector detecting a difference in feed amount of the main rope by rotation of the sheave when the elevator car travels equal distances under the first and second travel controls, and a determiner determining traction performance of the sheave based on the difference in the amount of feed of the main rope detected by the rope feed amount difference detector.