METHOD OF CONTROLLING CRANE BOOM ARRANGEMENT AND APPARATUS FOR IMPLEMENTATION THEREOF

摘要

The invention relates to a method controlling a crane boom arrangement (2, 3, 4, 5, 6), comprising moving a lifting boom (3) functionally connected by a joint (18) to a post (2) mounted in a crane base (1) by at least one lifting cylinder (7). The lifting cylinder (7) is articulated with the post (2) by a first joint (16) and connected to the lifting boom (3) movable with respect to the post (3) by a second joint (17) and it is controlled by control means (23). The invention is characterized in that the lifting boom (3) is moved with respect to the post (2) by a moment generated by an auxiliary cylinder (9) controlled by separate control means (22) about a joint (18) connecting the post (2) and the lifting boom ( 3) in situations where the position between the post (2) and the lifting boom 83) is such that the moment of the lifting cylinder (7) alone is insufficient for moving the lifting boom (3).