Automated lumber retrieval and delivery
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United States of America Patent
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May 18, 2021
Grant Date -
N/A
app pub date -
Aug 3, 2019
filing date -
Sep 2, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
An automated lumber handling method laser-scans the top profile of multiple stacks of lumber, each of which contain boards of a unique size. Based on the scanned profiles, the method determines the order in which individual boards from a chosen stack should be transferred to a numerically controlled saw. The saw cuts the boards to size and in proper sequence to facilitate orderly assembly of a roof truss or prefabricated wall. In some examples, the method lifts individual boards by driving two retractable screws, or some other piercing tool, down into the upward facing surface of the board. A track mounted cantilever, holding the screws and a laser unit, translates over the lumber stacks to retrieve and deliver individual boards and, while doing so, the laser repeatedly scans the stacked lumber profiles on-the-fly to continuously update the profiles. The open cantilever design facilitates replenishing the stacks of lumber.
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