RING LIFT CRANE

摘要

To move said crane into different operating modes the uprights (17, 17') can be lifted in relation to the base apparatus and joined in different manners to the cross-bars (26, 27) in a non-positive fit. In the initial position the positive fit between the uprights (17, 17') and the cross-bars (26, 27) presents a predeterminable play (79, 79'). To permit the rotating movement of the crane gantry the invention provides for several trolleys (18) of identical structure which have two axles and wheels fixed to same. The trolleys can be connected in a positive fit with both the uprights (17, 17') and the ring or a ring segment (20a, 20e).