Erection system for rotary crane with mast - includes raising mast into vertical position with block and tackle

摘要

The operating procedure is for setting up a rotary crane with a mast at whose top end is a boom and a support block. At the outer end, the boom holding cable and the boom adjusting cable are fixed. The adjusting cable emerges from the top chassis and for crane transport, the beam lies on the horizontal mast and the support block lies on the boom. The mast can be set up into the vertical position via a block and tackle which is connected with the top chassis. The boom holding cable and the boom adjusting cable have such a given length which is unchanged during the setting up and the operation of the crane that they are taut or have only a little slack in the collapsed condition of the crane. The beam arm is raised at the same time as the mast is raised from the horizontal into the vertical.