The present invention provides a structure capable of automatically adjusting a relative position between a hook device and a center of gravity of a cargo in the hook device including a plurality of locking portions. A hook device includes a central shaft (32) which extends in a first direction, and a first locking portion (34c) and a second locking portion (35c) which are disposed such that the central shaft (32) is interposed therebetween, in a second direction orthogonal to the first direction. The first locking portion (34c) and the second locking portion (35c) are connected to the central shaft in a state where the first locking portion (34c) and the second locking portion (35c) are not rotatable independently around an axis extending in the first direction and are rotatable around an axis extending in a third direction different from the first direction and the second direction.
HOOK DEVICE AND CRANE
HAKENVORRICHTUNG UND KRAN
DISPOSITIF DE CROCHET ET GRUE
05.02.2020
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |