| 摘要 |
An apparatus for cutting an elongated workpiece at a selected angle with respect to the longitudinal axis of the workpiece. The apparatus has a power saw mounted to an upright support member which provides for horizontal movement of the power saw back and forth along a straight line across the workpiece; the upright support member being rotatable about a vertical axis to align the power saw along a desired cutting pitch angle. The upright support member has a pair of upwardly extending rocket arms rotatably mounted proximate their lower portions to the upright support, while the upper portions of the rocker arms are rotatably mounted to an upper power saw carrying member on which the power saw is, in turn, carried for pivotable movement to and away from the workpiece independent of its horizontal motion. A pivot and slot arrangement disposed intermediate the opposite rotational axes of the rocker arms cooperate with the upright support as the lower portion of the rocker arms rotate through a predetermined arcuate path so as to impart a horizontal motion to the upper power saw carrying member. A stop member is carried by one of the rocker arms and engages the other rocker arm after a predetermined amount of stroking movement to limit such horizontal movement by a predetermined amount.
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