Changeover apparatus for changing between at least two workpiece supports for a machining machine

A changeover apparatus for changing between at least two workpiece supports for a machining machine, the changeover apparatus comprising:

• a base frame having a carrier apparatus for the at least two workpiece supports being vertically movable by said carrier apparatus, with a result that one of the workpiece supports is transferred into a working plane in which the one workpiece support is moved from said carrier apparatus into the machining machine and guided out therefrom;
• a lifting apparatus acting between said base frame and said carrier apparatus and by way of which said carrier apparatus is moved vertically relative to said base frame in order for a respective one of the workpiece supports to take up a first lifting position or at least one further lifting position in the working plane, said lifting apparatus containing at least one slotted guide, which is horizontally movable and movably actuates said carrier apparatus with the at least two workpiece supports together between the first lifting position and the at least one further lifting position in relation to said base frame;
• at least two carrier rollers disposed on said base frame;
• at least two running rollers disposed on said carrier apparatus;
• and
• said at least one slotted guide is a plate-shaped slotted guide and is movably guided between said at least two carrier rollers disposed on said the base frame and said at least two running rollers disposed on said carrier apparatus;
• and
• said at least two carrier rollers and said at least two running rollers each have a running surface with a guide contour formed therein which guides said plate-shaped slotted guide between said at least two carrier rollers and said at least two running rollers.