The invention relates to a method and an arrangement for monitoring the safety of a counterweighted elevator. In the method an elevator car (2) is driven with a hoisting machine (3) towards the top end of the elevator hoistway (4), contact between the counterweight (5) and the end buffer (6) of the elevator hoistway is determined, a reference point (R1) for the location of the elevator car (2) is registered when detecting contact between the counterweight (5) and the end buffer (6), the distance (Delta s) that the elevator car travels onwards from the aforementioned reference point (R1) for the location is measured, and if the distance (Delta s) traveled by the elevator car (2) onwards from the aforementioned reference point (R1) exceeds a threshold value (K), a signal indicating a risk of slackening of the traction rope (1) is formed.


    Access

    Download


    Export, share and cite



    Title :

    Method and arrangement for monitoring the safety of a counterweighted elevator


    Contributors:
    KATTAINEN ARI (author) / HOVI ANTTI (author)

    Publication date :

    2015-11-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS



    Press forging counterweighted crankshafts

    Engineering Index Backfile | 1945


    Counterweighted crankshaft among new Cunningham features

    Blanchard, D. | Engineering Index Backfile | 1925


    A COUNTERWEIGHTED ROPED HYDRAULIC LIFTING SYSTEM

    LANDBERG MAGNUS | European Patent Office | 2017

    Free access

    Counterweighted lift bridge on the Erie railroad

    Engineering Index Backfile | 1896


    ELEVATOR SAFETY ARRANGEMENT AND ELEVATOR

    KATTAINEN ARI / AITAMURTO JUHA-MATTI / HAAPANIEMI MARKKU et al. | European Patent Office | 2018

    Free access