| 摘要 |
A locking device for a hooked spreader bar includes first and second locking members. The locking member has a shaped nose to fit serrations in a strap to prevent longitudinal movement of the strap. To release the strap the second member is rotated clockwise so that initially a surface lifts away from a side of the nose. Thereafter further rotation of the second member abuts the first member and causes the first member to rotate (clockwise) and lift the nose away from the serrations. During closing of the locking device, the first member is rotated anti-clockwise and pushes against and rotates the second member, which is fully closed by downward manual pressure on its top surface.
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