| 摘要 |
A log feed mechanism that will longitudinally move successive logs toward the cutting and/or chipping mechanisms of a sawmill while holding the successive logs along a prescribed path of movement such that the successive logs may be efficiently sawed into standard size lumber. The feed mechanism includes a roller device by which the successive logs may be rotated about their longitudinal center axes in order to determine the most desirable position for the log to be in when cut into lumber. The successive logs are fed onto a first conveyor assembly that performs the functions of centering the successive logs and moving the logs in a forward direction while maintaining the centered condition. Press rolls are provided over the first conveyor on either side of a rosser. The rosser operates to remove knots and enlarged butts of successive logs to provide a relatively smooth surface for gripping by a downstream second conveyor. The second conveyor receives the logs from the first conveyor after being operated upon by the rosser. It is spiked to firmly grip the smooth surface formed by the rosser and will thereby firmly hold the logs against rotational or lateral movement. To further assist the function of the second conveyor to hold the successive logs against undesirable movement, a number of side roller assemblies are provided that are biased against the logs as they move along the second conveyor. The feed mechanism is mounted on a vertically movable framework that may be selectively adjusted up or down to control the elevational input of the logs moving from the feed mechanism to downstream sawing and/or chipping mechanisms of the sawmill.
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