| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the work of a stiffening means in case of a carrying mode, with which wrinkle is easy to be generated in a sheet material by stiffening, by releasing the engagement of a sheet material stiffening means and the sheet material during the carrying. SOLUTION: A pair of discharging rollers 21, 22 form a stiffening means K1 for stiffening a sheet material S with a flange-type rib 22a. In case of carrying the sheet material S in the arrow A direction, force is applied to the discharging roller 21 in the arrow A2 direction of a long hole 61 by the force for pulling the sheet material S in the carrying direction. The pair of discharging rollers 21, 22 discharge the sheet material S in the stiffening condition. In case of carrying the sheet material S in the direction opposite to the arrow A1 by switch-back, since the discharging roller 22 and a carrying roller 19 are reversely rotated, the oblique upward force in the direction opposite to the arrow A2 is applied to the discharging roller 21, and the pinching force of the pair of discharging rollers 21, 22 is released. In this condition, since the carrying rollers 18, 19 carry the sheet material S without stiffening the sheet material S, generation of wrinkle is prevented.</p> |
