| 摘要 |
A cargo bar of the type wedged in place in a cargo vehicle to prevent shifting of the cargo. A ratchet mechanism for extending the bar includes an advancement pawl, a release pawl and an eccentric ratchet head acting between the pawls. The ratchet head is connected with the ratchet housing by a pin fitting through an elongated slot. In normal operation, the ratchet head is limited in its movement by a projecting foot contacting the ratchet housing. To effect easy release of the cargo bar, the head can be shifted linearly as allowed by the slot and then pivoted further by the ratchet handle so that an angled surface on the head cams against the holding pawl to release it using the leverage of the handle. Force limitation is achieved by providing an extending collar on one bar which contacts the release pawl to prevent further reciprocation of the ratchet head when the maximum allowed force level is reached.
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