Hoisting device, in particular floating derrick

摘要

The invention is related to a hoisting -device, in particular a floating derrick with a hoisting portal (1, 2) or hoisting pole on the upper end (2) of which a plurality of juxtaposed tackles (3, 4) is pivotably mounted in which each of said tackles (3, 4) comprises a fixed upper block (3) with a plurality of pullies and a free lower block (4) with a plurality of pullies (5).;The invention aims to provide a hoisting device of the said type having more pullies (5) in the tackles to increase the hoisting power; of which the lift height is increased; the pivot angle about which the lifting cables may pivot sidewards is far greater than 15°; the construction is simple; and having the possibility of mutual oupling of the outer and inner blocks.;According to the invention this is obtained by the fact that the rotary shafts of the pullies (5) extend substantially perpendicular to the pivot shafts by which the upper-blocks (1, 2) are suspended to the portal or pole.;The freedom of use of the hoisting device according to the invention is increased considerably.