| 摘要 |
An improved harvesting and processing apparatus for trees is provided. The harvester is of the type having a gripping means disposed adjacent its forward end and a boom along its longitudinal axis. A shear and delimber associated with the apparatus are longitudinally movable relative to the boom. The shear and delimber are initially positioned adjacent each other. During delimbing, the delimber moves rearward relative to the shear. At the end of the delimbing stroke, the shear is activated to sever a bolt. A greater pressure is then applied to the delimber blades so they grip the remaining trunk during the return stroke as the delimber moves forward. At the end of the return stroke the delimber and shear have returned to their initial positions and a delimbed portion of the remaining trunk extends forward a sufficient distance to be clamped by the gripping means. The pressure on the delimbing blades is reduced to the regular delimbing pressure, and the harvester is then in position to perform a second delimbing stroke, followed by a second return stroke, and if necessary, a third set of strokes.
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