Manual trucks that allow to lift up and lower stairs. Consists of a loading bridge (1) with a frame (2) that circums it, on the front section two rotating rollers (3) are subject to sendos supports (4), on the central part of the loading bridge two arms (6) ) are subjected to the frame (2) by a rotating axle (9) fixed with a bolt (10) taking at its extreme rotary wheels (7), on the back of the loading bridge (1) they are subjected in a rotating shape around a horizontal axis (15) two manual levers (14). The rotary fixing of the outstanding elements of the load bridge has the end of folding for storage effects, fixed in the position of work through bolts. A variant is to add to the front part two arms (20) with wheels (21) that allow to convert the vertical truck in horizontal. (Machine-translation by Google Translate, not legally binding)
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