The invention discloses a derailment preventing device for a lift door. The derailment preventing device for the lift door comprises a lift door sliding block and a sill guide groove. The derailment preventing device for the lift door is characterized in that the lift door sliding block comprises a sliding block support fixedly connected with the bottom of the lift door, and a half-frame type stop hook parallel with the sliding block support; the bottom of the sliding block support is movably connected with the middle of the half-frame type stop hook through a rubber ring; the bottom of the sliding block support, the bottom and middle of the half-frame type stop hook and the rubber ring are placed into the sill guide groove jointly, and after the half-frame type stop hook is rotated by 90 degrees, the bottom of the half-frame type stop hook is clamped into the sill guide groove. The derailment preventing device for the lift door has the advantages that the structure is simple, and installation is convenient; besides, when the lift door is seriously impacted, the bottom of the half-frame type stop hook and the sill guide groove are clamped, so that the lift door is effectively prevented from falling off, the risk that passengers in a lift fall to a hoistway is reduced, and the security coefficient of the lift is increased.


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    Title :

    Derailment preventing device for lift door


    Contributors:
    ZHANG JIANZHONG (author) / JIA GUODONG (author) / DING LIN (author)

    Publication date :

    2015-10-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS



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