| 摘要 |
Conventional linkage projecting forward from a tractor, such as the linkage commonly used to support the bucket of a loader, carries a box frame for elevational movement and for tilting of the frame about a horizontal axis. Two sets of clamping grapple arms are mounted on cross members of the frame by upright pivot shafts extending between such cross members for swinging of the grapple arms. Jaws including shearing blades are mounted below the grapple arms between cross members of the frame for swinging about axes registered with the grapple arm axes. With the frame upright and the grapple arms and jaws open, the tractor is driven forward to embrace a standing tree between the grapple arms and the jaws. The grapple arms are closed to clamp the tree followed by closing the jaws to shear the tree, whereupon the tree, standing on the shearing blades, can be maneuvered in upright position to a piling or yarding area and swung downward by tilting the box frame forward.
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