SAFETY LOCK DEVICE FOR QUICK COUPLER

摘要

The present invention relates to a safety lock device for a quick coupler which prevents the coupled state of a work tool installed on a quick coupler at the front of an excavator from becoming arbitrarily released. A safety lock device for a quick coupler according to the present invention is a quick coupler having: a body; a fixed hook formed on one side of the body and having a coupling pin of a work tool inserted therein; and a movable hook provided on a side facing the fixed hook and pivoting according to the actuation of a cylinder to lock another coupling pin of the work tool. Safety locking means are provided on the inside of the body so that the movable hook and the coupling pin of the work tool located within the movable hook are not arbitrarily separated due to the pivoting of the movable hook, firmly maintain a locked state even when a cylinder is damaged during work or transit while the work tool is coupled to the quick coupler, and prevent the work tool from becoming separated or falling from the quick coupler. Thus, accidents causing human casualties and damage to machinery can be prevented, and safety can be ensured.