| 摘要 |
A continuous breakdown tilt hoist having an overhead rotatable secondary hoist where the overhead rotatable secondary hoist is selectively rotatable about a pi vot, selectively rotatable between an elevated non-engaging position into a lowered lumber stack translating position when primary hoist arms reach a raised position, the secondary hoist be ing selectively translatable between a lumber stack engaging position to a lumber stack discharg ing position, secondary hoist arms cantilevered outwardly of the secondary hoist so as to supp ort a first lumber stack when the secondary hoist is in the lumber stack translating position, the secondary hoist arms being selectively translatable so as to translate the first lumber stack ov er a tier shearing edge, the primary hoist returnable from a reclined position to a lumber stack re ceiving position and the primary hoist arms returnable to a lower position for receiving a second lumber stack from a lumber stack conveyor, and elevating the second lumber stack to the tier shear ing edge as the secondary hoist arms complete translating the first lumber stack over the tier s hearing edge.
|
