| 摘要 |
<p>According to the present invention, a safety hook to be used for catching and lifting an object using a crane, comprising: a shaft base supported in a space between the crane and the object when lifting the object; a pair of tong rings which has a rotary shaft at the bottom of the shaft base and is fixated to face each other to be rotated; a torsion spring which is wound on the rotary shaft of the pair of tong rings to be fixated to the inside and applies elasticity to make each end of the pair of tong rings be separated from each other; and a housing which accepts the shaft base to be slid in an axial direction and guides each end of the pair of tong rings to retract.</p> |
