| 摘要 |
<p>An arrangement for lifting a timber layer from a timber pack, comprising a vacuum lift device which includes a frame (3) that supports a suction plane (4) against which a layer (1) of timber pieces can be firmly sucked, wherein the frame is movable between a first position in which the suction plane is located adjacent the upper side of the timber pack (2) and a second position in which the suction plane is located above the infeed end of a lateral conveyor (5). The invention is characterized in that the arrangement is constructed to coact with a pack hoist (6) which supports a timber pack (2) with the pack inclined to the horizontal plane, wherein the pack hoist (6) is arranged to raise the timber pack (2) after a timber layer (1) has been removed therefrom so that the uppermost timber layer in the pack will be located on essentially the same level as the removed timber layer; in that the frame (3) is carried by a pendulum (12) which is pivotally mounted on a stand (13); in that the pendulum (12) is arranged to be swung relative to the stand (13) between the two positions by means of a force generator (15); in that in the first position of the frame (3) the suction plane (4) defines an angle with the horizontal plane and is generally parallel with an uppermost timber layer (1) in a timber pack carried by the pack hoist; and in that in the second position of the frame (3) the suction plane (4) coincides essentially with the plane of the lateral conveyor (5).</p> |
