| 主权项 |
1. A device for raising and moving objects (1), provided with a pneumatic lifting apparatus and with an associated hand pump (8, 18) and a valve (9) for temporarily extending the wheels (14) downward, so that the object (1) can be raised and then rolled away on the wheels (14), characterized in that the insert (2) is designed in the form of a sheet metal box which has an edge (5) projecting downward, which can be inserted in upside-down position in a recess in the lower side (3) of the object (1) to be raised, or which can be fixed on the lower side (3), wherein in this sheet metal box is inserted an air cushion (10), which fits its base surface and is provided with a port (11), and on this air cushion (10) is placed a plate (16), which is equipped with at least three wheels (14) on the side facing away from the air cushion (10), and wherein the plate (16) can be moved upward and downward in the sheet metal box along the lateral walls of the box, and wherein compression springs (15) are incorporated between the box-like insert (2) and the plate (16), which are vertically effective on the plate, and which can be compressed together when the air cushion (10) is pumped up, so that when the air cushion (10) is emptied, due to the spring force created by the relaxation of these compression springs (15), the plate (16) can be pressed away from the edge (5) of the box-like insert (2), wherein the wheels of the undercarriage can be completely retracted over the lower edge (2) of the box-like insert (2) in the upward direction. |
