| 摘要 |
PROBLEM TO BE SOLVED: To prevent loosening of a resin sheet occurring in switching the resin sheet from a conveyance state to a conveyance stop state.SOLUTION: Conveyance portions 7a and 7b carrying a continuous resin sheet 2 are composed of a roller pair 32a and 32b arranged on the inlet side and on the outlet side, respectively, of a thermoforming portion 6, and the resin sheet 2 is carried through rotation of the inlet- and outlet-side roller pair 32a and 32b in the same direction. The conveyance of the resin sheet 2 is stopped by a stop of the rotation of the inlet- and outlet-side roller pair 32a and 32b. Of the inlet-side roller 32 and the outlet-side roller 32b rotating in the same direction, the rotational speed of the outlet-side roller 32b is set to be higher than the rotational speed of the inlet-side roller 32a so as to apply tension to the resin sheet 2 in the thermoforming portion 6. |
