| 摘要 |
A lock-down mechanism for a floating platform for use in doff trucks and the like. The lock-down mechanism is carried adjacent the upper ends of a pair of lazy tongs so that its operation is not effected by lint and other foreign matter accumulated in the bottom of the doff truck. The lock-down mechanism includes a pivotal arm that is spring biased in an initial position. As the floating platform is lowered the pivotal arm is moved towards a keeper and engages an inclined notch therein. By lowering the floating platform further the pivotal arm passes around the keeper to its initial position allowing the platform to be raised.
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