| 摘要 |
Provided is a hook apparatus having a spring seating groove and a resilient member, thereby easily unfastening a hook by a resilient member installed on an upper portion of the hook. A body(30) is equipped with a cylindrical chamber(31) and a piston(20) on an inner portion of the body. A hook is fastened and unfastened in a vertical motion of the piston by an air pressure system, and is equipped with a resilient member(100) for supporting an opening of the hook. The resilient member is installed on a spring seating groove(200) concavely formed on an upper portion of the hook, and is a torsion spring that one portion thereof supports the spring seating groove and the other portion thereof is fixed to a lower surface of body. |
