Automatic safety device for quick coupler

摘要

Disclosed therein is an automatic safety device for a quick coupler which is used when an attachment is joined to an arm of heavy equipment, such as excavators. The automatic safety device has a new type latch assembly that is automatically locked and released in liaison with a cylinder actuating a movable hook of the quick coupler for joining and detaching attachments, such as buckets or breakers, thereby securing convenience and safety in work and preventing various accidents by stably keeping the joined state of the attachment even though an external force is frequently applied during work. [Figures] [Fig. 1] 10a10 341 32a , 40 22 o 60 [F21 IFig. 2]