ATTACHMENT CONNECTING DEVICE

摘要

An attachment connecting device, comprising a fixed hook pivotally supported on a working arm through a first pivot shaft, a movable hook pivotally supported on the fixed hook through a second pivot shaft, and a hydraulic cylinder for movable hook rotation installed between the both hooks, wherein a first engaging recessed part is formed in the fixed hook and a second engaging recessed part is formed in the movable hook, each locking pin of an attachment having a first locking pin and a second locking pin is fitted to each energizing recessed part, each energizing recessed part is formed generally in V-shape as viewed in the axial direction of each locking pin fitted therein, internal surfaces parallel with each other as viewed in the axial direction of the locking pin fitted therein are formed at least in one engaging recessed part at a portion nearer an opening end than the generally V-shaped portion so as to provide a projected part, and the cylinder main body of the hydraulic cylinder is disposed between both side plate parts of the fork-shaped fixed hook and pivotally supported on the both side plate parts through a pivot pin.