Patent ID: 6571914
Filing Date: 2003-06-03
Classification: B66F

Abstract:
A lifting apparatus for high-place work comprisinga moving supporting leg having a guiding case with opposite open ends and plural walls, guiding grooves attached to said walls, plural elastic strips movable through said guiding grooves for forming an integrated column for enhancing structural integrity, a plurality of connecting pieces transversely attached to said elastic strips with a proportional number of the connecting pieces being composed of shorter and longer lengths with the longer connecting pieces having fitting grooves on ends thereof, which matingly engage the ends of the shorter connecting pieces; winding drums adapted to be disposed rotatably on a floor surface at positions corresponding to a respective one of the elastic strips for winding each of said elastic strips in the form of roll; a first driving means disposed in the vicinity of the moving supporting leg for furnishing to said winding drums a driving force to wind the elastic strips through an axial connection to a respective one of said winding drums; a second driving means disposed contiguous to one of the elastic strips of the moving supporting leg at a position isolated from the first driving means for furnishing a driving force to control the movement of the moving supporting leg in relation with the operation of the first driving means; and a controlling means for controlling the switching on or off of the first and second driving means.