Kokoontaitettava puominosturin runko

The utility model relates to a movable and foldable cantilever crane framework (1). The movable and foldable cantilever crane framework (1) comprises an upright post (2) and a cantilever (3) fastened to the top of the upright post; the upright post (2) is provided with at least two column parts adopting basically tubular shapes (4 and 5); the column parts can be folded to positions which are next to each other and in contact with each other; the cantilever (3) is provided with at least two cantilever parts (7 and 8); the cantilever parts can be folded to positions which are next to each other, lean against the upright post (2) and are in contact with each other; an erect and downward bending mechanism on which column parts are arranged, and a cantilever part locking and releasing mechanism used for locking the cantilever parts in the folding positions and releasing the cantilever parts from the folding positions are arranged inside the upright post (2); besides, the bottom of the upright post (2) is provided with a locking device (13) used for locking the upright post in an operation place.