PROBLEM TO BE SOLVED: To provide an encoder capable of detecting occurrence of failure even when a rotation body does not rotate.SOLUTION: An encoder 10 includes: a rotation body 12; a light receiving element 14; and a light receiving element 15. The rotation body 12 is formed with a first slit 17 for detecting rotation speed and a second slit 18 for detecting failure. The light receiving element 14 receives a beam of light from the light receiving element 13 passing through the first slit 17. The light receiving element 15 receives a beam of light from the light receiving element 13 passing through the first slit 18. The second slit 18 opens in a circular shape around a shaft 11.

    【課題】回転体が回転していない時でも異常の発生を検出できるエンコーダを提供する。【解決手段】エンコーダ10は、回転体12と受光素子14と受光素子15とを備える。回転体12に、回転速度を検出するための第1スリット17と異常を検出するための第2スリット18とが形成される。受光素子14は、第1スリット17を通過した発光素子13からの光を受光する。受光素子15は、第2スリット18を通過した発光素子13からの光を受光する。第2スリット18は、軸11を中心に環状に開口する。【選択図】図2


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    Title :

    ENCODER AND ELEVATOR SYSTEM


    Additional title:

    エンコーダ及びエレベータ装置


    Contributors:

    Publication date :

    2015-12-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / B66B Aufzüge , ELEVATORS



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