| 摘要 |
PURPOSE:To uniformly cut the obverse and reverse of a workpiece material without measuring its thickness, even when unevenness is provided in the thickness of the workpiece material, by providing a lift control device which moves a movable frame, for turnably supporting a parallel link, to a position where the center line of an insertion passage agrees with the center of a feed material space between sanding heads. CONSTITUTION:When a movable frame 6 is lifted by a lift control device 7, swivel axes 5, serving as the supporting point for parallel links 4 and the movable frame 6, are lifted, and the parallel link 4, in the point of time at least a workpiece material W is fed, is tilted with the swivel axis 5 serving as the center to hold the workpiece material W. Position adjustment of the swivel axis 5 of this parallel link 4 is controlled in a manner wherein the center of a feed material space S between sanding heads 10a, 10b agrees with the center line l of an insertion passage (p) between guide devices 2, 3. Further in a condition that the workpiece material W is fed between the guide devices 2, 3, the lower part guide device 2 is supported in a position for pressure-holding the workpiece material W in a position holding device 8 and for holding the position of the upper part guide device 3. |
