Trolley for the transportation of a load on staircases

摘要

A trolley for the transportation of a load on staircases having at least one main track (3, 30) projecting below a main support frame (2) in order to define a first lower slide surface (4) for the trolley, motor means or actuation means for said at least one main track (3, 30), and at least one load bed (5) supported by said main support frame (2), comprising at least one auxiliary frame structure (7) provided with support and slide or roll means (8) delimiting a second slide surface (9) on the lower part, and lifting-lowering means (10a, 10b) for said at least one auxiliary frame structure (7) designed to move said at least one auxiliary frame structure (7) with respect to said main support frame (2) between: an upper rest position, in which said trolley (1) is movable by said at least one main track (3, 30), and a lower work position, in which said trolley (1) rests on said at least one auxiliary frame structure (7) and is movable on said slide or roll means (8).