| 摘要 |
Previous methods of bucksawing logs slow the throughput of a sawmill in that the conveyor line is stopped while a given log is bucksawed to length. The present invention provides an apparatus for bucksawing a log which improves the throughput speed by a) advancing the log endwise along an infeed conveyor; b) raising the log above the level of said infeed conveyor while advancing the log; c) measuring the advance of the log while raised; d) stopping the log at the desired length; e) sawing the log to produce a forward log segment; and f) advancing the forward log segment onto an outfeed conveyor while advancing the remaining log segments. The apparatus comprises a first horizontal log-feeder for feeding a log in an end-wise line of travel; a second horizontal log feeder which receives the log from the first feeder and lies in a horizontal plane slightly above the horizontal plane of the first horizontal log-feeding means; first and second pivoting vertical feed rolls; a saw which moves across the line of travel of the log on the second horizontal log feeder means in response to a control signal; a measuring device for measuring the distance travelled by the log while on the second horizontal log feeder and communicating the measurement to a controller; a third horizontal log feeder means which receives the log from the second horizontal log feeder; and a controller for receiving the measurement signal and communicating control signals to the saw and to the vertical feed rolls for pivoting the vertical feed rolls. The vertical feed rolls advance and stop the log in response to the control signal.
|
