DISENGAGEMENT PREVENTING STRUCTURE FOR ATTACHMENT OF SWIVELING WORKING VEHICLE

摘要

PROBLEM TO BE SOLVED: To adapt to the mounting of various attachments and easily perform the setting of a disengagement preventing mechanism with safety in construction machinery like a back hoe and others. SOLUTION: An attachment attaching/detaching device 11 is composed of a fixed hook 15 and a movable hook 14 and mounted on the construction machinery like the back hoe provided with an arm and the attachments. Pins 30 for preventing disengagement are inserted into a plurality of inserting holes 19, 19... mounted around a pivotal support hole on the movable-hook 14 side of the fixed hook 15 and a plurality of long inserting holes 18, 18... mounted around the pivotal support hole of the movable hook 14 positioned on the inner side of the fixed hook 15.