| 摘要 |
A carriage has a wheeled base with an articulated frame for supporting a construction panel in a multitude of operator-defined orientations during transportation, fitting and installation of the panel. The frame and a construction panel secured to the frame are movable relative to the base between (a) a reclined transport position in which the center of mass of the construction panel overlies the area bounded by the wheels of the base to enhance stability of the carriage during transportation of the panel, and (b) an upright installation position in which the center of mass of the construction panel is located forwardly of the wheels of the base. In the installation position of the frame, transfer balls below the frame transfer the weight of a construction panel to the surface on which the carriage operates to enhance stability and facilitate rolling movement of the carriage. Independently operable elevators are provided on the frame for uniformly elevating the base and the frame and a construction panel secured to the frame while maintaining contact between the transfer balls and the operating surface. The elevators alternately are operable differentially for adjusting the angular orientation of the frame and construction panel secured to the frame. A laterally extendable strut on the base supports weight of the carriage when the carriage is in an overturned working position in which a construction panel secured to the frame rests on a side edge thereof.
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