Patent ID: 7918053

Claim:
A container usable as a working space with a variable volume, comprising: a unit comprised of a floor wall, a roof wall and at least one side wall that is foldable about a horizontal axis; at least one expansion element arranged to be movable out of the unit and having a floor, a side open to the unit and a front wall situated opposite the open side and in a permanently fixed position relative to the floor and open toward a top thereof, and, in a moved-out condition of the at least one expansion element, a roof wall thereof being formed by an associated side wall of the unit upon being folded open; a lifting device including a cable winch attached to the at least one expansion element for lowering the at least one expansion element such that, after moving of the expansion element out of the unit, an upper surface of the floor wall of the moved-out expansion element and an upper surface of the floor wall of the unit are situated at the same level, and for lifting the at least one expansion element such that, after lowering, the expansion element is movable back into the unit; wherein the lifting device is configured to be active between the associated side wall after being folded upon and an associated one of the at least one expansion element, wherein tracks are provided on the at least one side wall to guide the at least one expansion element, and a first group of rollers being operatively attached on traveling carriages for moving the at least one expansion element out of or into the unit along the tracks, and a second group of rollers being operatively attached on the traveling carriages with a cable of the cable winch for lifting and lowering the at least one expansion element, wherein the traveling carriages are slidably positioned in the tracks via the first group of rollers, and guided in the tracks via the first group of rollers.