| 摘要 |
Apparatus adapted to be connected to the free end of a boom carried by an appropriate vehicle for bulk lopping of trees, such for example as during forest thinning and for substantially simultaneous bucking and prestacking thereof. The apparatus includes a frame adapted to be connected to the boom, at least one pair of lifting and lopping arms pivotally mounted to respective elongate pivot members of the frame, the arms extending downwardly in an open position and movable inwardly to a closed position for engaging and suitably locating the trunks of the trees therebetween. Structure for feeding tree trunks through the apparatus include roll units fixed to the frame as well as roll units movably mounted on the frame, the latter being movable between a first open position for receiving the tree trunks engaged by the lifting and lopping arms and a second closed position defining an adjustable feeding pocket. The lifting and locking arms and movable roller units are interconnected so that their respective movements between open and closed positions are effected substantially simultaneously. Lopping blades are provided on the arms for lopping the trunks as the latter are fed through the apparatus under the action of the feed roll units.
|
