The invention relates to a protective device for preventing an elevator from being opened or closed secondarily. The protective device comprises a guide board, an installation board, an anti-return strip rotationally arranged on the installation board from the middle portion, a guide wheel arranged at one end of the anti-return strip and arranged on the guide board in a rolling manner, an elastic piece with the two ends arranged at the other end of the anti-return strip and the installation board and a limiting column arranged on the anti-return strip and abutting against the right side of the installation board. The guide board comprises a horizontal extending section, a left slope section and a right slope section, wherein the left slope section and the right slope section extend from the horizontal extending section to the left end and the right end respectively. When the guide wheel is located on the horizontal extending section, the limiting column is away from the installation board; when the guide wheel is located on the left slope section or the right slope section, the limiting column prevents a door sliding board from moving rightwards, and the door sliding board is prevented from moving leftwards through the left slope section or the right slope section. Through the adoption of the protective device, the phenomena that a car door is secondarily opened or closed and stopped due to leftward and rightward movement of the door sliding board after a drive mechanism stops working can be effectively prevented, and the operation safety of the car door is guaranteed.


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    Title :

    Protective device for preventing elevator from being opened or closed secondarily


    Contributors:
    ZHANG LINFENG (author) / LIANG LEI (author)

    Publication date :

    2015-11-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS



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