The present invention provides a door lock turning mechanism for a latch of a lift shaft escape door to prevent inadvertent opening of the door by persons on the non-lift shaft side of the door. The door lock turning mechanism comprises a selectively functional spindle and an activator, the spindle having between first and second ends a laterally stepped surface which defines an annular shoulder extending around the spindle, the second end of the spindle extending above the shoulder. The shoulder has a laterally extending ridge in it. The activator comprises a sleeve for fitting over the second end of the spindle and an engagement member for aligning over the shoulder. The activator has a default state in which it can spin around the second end such that its engagement member can free spin above the shoulder without adequately engaging the ridge for turning the spindle. The activator also has a pressed-in state in which the activator can part spin around the second end, but depending upon the spin direction of the activator relative to the spindle, that spinning will either continue as a free spin, or if turned in the other direction it will bring the engagement member into contact with the ridge, that engagement between the engagement member and the ridge, if the pressing-in is firm enough, being a tight contact to cause further turning of the activator to also turn the spindle. If it is not firm enough, however, the free spin can continue as the engagement member will ride over the ridge.


    Access

    Download


    Export, share and cite



    Title :

    LOCKING MECHANISM FOR LIFT SHAFT DOOR


    Additional title:

    VERRIEGELUNGSMECHANISMUS FÜR AUFZUGSSCHACHTTÜR
    MÉCANISME DE VERROUILLAGE POUR PORTE PALIÈRE D'UN ASCENSEUR


    Contributors:

    Publication date :

    2022-02-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS / E05B LOCKS , Schlösser / E05C Riegel oder Feststellvorrichtungen für Flügel, insbesondere für Türen oder Fenster , BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS



    Locking mechanism for lift shaft door

    HANS NICHOLAS PURDOM / JEFFREY MICHAEL JONES | European Patent Office | 2022

    Free access

    Landing door locking device for lift

    LEE SANG BUM | European Patent Office | 2023

    Free access

    Locking system for a lift door

    UMBAUGH BARRY K | European Patent Office | 2015

    Free access

    LOCKING DEVICE OF TOWER LIFT DOOR

    PARK SI WOO | European Patent Office | 2022

    Free access

    Cabin lift locking mechanism

    BEHRENS RANDALL DEAN | European Patent Office | 2017

    Free access