| 摘要 |
A hold down device for a dock leveler employs a pair of telescoping members sliding with respect to each other. One member is coupled to the deck and the other to the leveler frame. A resilient member biases the telescoping members toward each other but provides for a degree of float in the system. A brake shoe has a ramp surface and is biased against one of the members as they separate. A release lever moves the brake shoe for disengagement as the leveler is lowered. Thereafter the brake shoe engages and movement is via the resilient member. If the leveler moves down such that the resilient member is compressed, as the telescoping members compress they cause the release member to move thereby slipping the brake. This in turn allows the telescoping members to reset and re-engage the brake.
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