| 摘要 |
An expansible bin for receiving graded and sized lumber is provided between an overlying sorting conveyor and an underlying takeout conveyor. The bin includes at least two underlying and spanning bunks supported at either end by depending cables gathered and released from point immediately below the sorting conveyor. When the bunks are initially filled with lumber, they are drawn immediate the release point of the sorting conveyor to prevent board splitting due to droppage. As lumber accumulates in the bins, the bunks are sequentially lowered to provide together with the cable a bin of constantly expanding volume. When full, the bunks are lowered parallel to and below the takeout conveyor to provide for gradual placement of the sized and graded lumber in the bin on the takeout conveyor, and the cables released from one end of the bunks to permit the lumber to be converged away.
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