| 摘要 |
The present invention relates to a quick coupler having an automatic locking device which prevents safety accidents caused by falling of an attachment by automatically fixing a coupling pin of the attachment onto a fixing hook right after a driver couples the coupling pin of the attachment to the fixing hook. The quick coupler according to the present invention comprises: a rotating key wherein a spring is inserted into a lower end; a hydraulic cylinder having a shaft protrusion protruding from an upper end; an auxiliary key which faces downward by a spring; and an operating hook stopper stopping a released state of an operating hook at a specific location when the operating hook is released as the hydraulic cylinder contracts. |
