B - Operations – Transporting – 66 – C
Patent
B - Operations, Transporting
66
C
B66C 23/76 (2006.01) B66C 23/68 (2006.01)
Patent
CA 2539014
The invention relates to a load-lifting and -handling appliance with an articulated slewing jib. The inventive appliance consists of: a mast with a slewing pivot, an articulated jib (16) comprising a jib foot (19) having a first end which is articulated to the top of the mast by a horizontal axis of rotation (27), a fly jib (18) which is articulated in rotation to the second end of the jib foot by means of a horizontal pivot bolt (32), a jib-retaining assembly including at least one king post (7), a jib-retaining sling (11), and a mobile counterweight (100) which is connected to the jib by means of said retaining sling. The aforementioned counterweight is slaved to follow a guide track (1) having a variable (alpha) slope, which is solidly connected to the slewing pivot, which supports the counterweight and which is disposed opposite the jib. Moreover, the (alpha) slope variations are selected such that the counterweight exerts a number of variable forces on the jib.
Engin de levage et de manutention de charges à flèche distributrice orientable et articulée, comprenant un pylône avec un pivot tournant, une flèche articulée (16) comprenant un pied de flèche (19), articulé à sa première extrémité au sommet du pylône par un axe de rotation horizontal (27), une fléchette (18) articulée en rotation par un axe d'articulation horizontal (32) à la deuxième extrémité du pied de flèche, un ensemble de retenue de flèche comprenant au moins un poinçon (7), une élingue de retenue de flèche (11) et un contrepoids mobile (100) relié à la flèche par ladite élingue de retenue. Le contrepoids est asservi à suivre une voie de guidage (1) de pente (alpha) variable, solidaire du pivot tournant, supportant ledit contrepoids, agencée à l'opposé de la flèche, et dont les variations de pente (alpha) sont choisies de sorte que le contrepoids exerce un ensemble de forces variables sur ladite flèche.
Shapiro Cohen
Yerly Jean-Marc
LandOfFree
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