| 摘要 |
A ratchet buckle has a mandrel around which a strap for securing cargo or the like is wound. A handle assembly is connected to the mandrel through ratchet wheels and is manually driven up and down to tighten the strap. The handle assembly is divided into an outer section, which is manually driven up and down, and an inner section, which is connected to the mandrel. The two sections are connected together so that the driving of the outer section effects driving of the inner section. A spring operates to urge detents on the inner section into the ratchet wheels. Torsion springs are connected between the inner and outer handle sections. The inner and outer sections as well as the torsion springs are supported on a bolt and interconnected by lugs on one section and slots in the other section, which are driven together by spring washers. When the tension on the strap exceeds a predetermined level, the force of all of the springs is exceeded and the inner handle section is driven out of torsional engagement with the outer handle section.
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