Articulated jib crane

Details Articulated jib crane Articulated jib crane

B - Operations, Transporting

66

C

B66C 23/34 (2006.01) B66C 23/10 (2006.01) B66C 23/76 (2006.01)

Patent

CA 2414173

The invention concerns a load lifting and handling appliance with articulated jib, capable of being raised and inclined, comprising a mast, a jib foot articulated in rotation at its first end (35) to the top of the mast (21, 22, 29), a fly jib (41) articulated in rotation at the second end (36, 37) of the jib foot, said fly jib comprising on either side of its hinge pin (45) to the fly jib foot respectively a fly jib point (43) and a counter fly jib (42, 49), a jib-retaining assembly comprising at least a king post (16) and a jib tie (25), and at least a double acting stick cylinder (3) linking the jib foot to the fly jib, determining the angle between jib foot and fly jib. The foot portion proximate to said second end and the counter fly jib having conjugated shapes enabling the fly jib point to be urged in aligned position with the jib foot. The lifting appliance may comprise a mobile counterweight system (113).

Engin de levage et de manutention de charges à flèche distributrice articulée, relevable et inclinable, comprenant un pylône, un pied de flèche articulé en rotation à sa première extrémité (35) au sommet du pylône, (21, 22, 29), une fléchette (41) articulée en rotation à la deuxième extrémité (36, 37) du pied de flèche, ladite fléchette comportant de part et d'autre de son axe d'articulation (45) au pied de flèche respectivement une pointe de fléchette (43) et une contre-fléchette (42, 49), un ensemble de retenue de flèche comprenant au moins un poinçon (16) et un tirant de flèche (25), et au moins un vérin d'articulation (3) à double effet reliant le pied de flèche à la fléchette, déterminant l'angle entre pied de flèche et fléchette. La partie du pied de flèche voisine de ladite deuxième extrémité et la contre-fléchette présentent des formes conjugées permettant à la pointe de fléchette de venir en position alignée avec le pied de flèche. L'engin de levage peut comporter un système de contrepoids (113) mobile.

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