| 摘要 |
PROBLEM TO BE SOLVED: To selectively apply curvature-different bending to sheet materials in one device in application for various sheet materials. SOLUTION: A sheet material bending device 100A includes two driving rollers 35, 36, a small-diameter bending roller 37 and a large-diameter bending roller 38. The small-diameter roller 37 is put in press contact with the driving rollers 35, 36 with the great pressure force F2 of a pressure spring, not illustrated. It holds F1<F2. Thin and flexible sheet materials S1 are passed between each of the driving rollers 35, 36 and the small-diameter bending roller 37 and bent by the small-diameter bending roller 37, as shown in Fig (a). Thick and rigid sheet materials S2 are passed between each of the driving rollers 35, 36 and the large-diameter bending roller 38 and bent by the large-diameter roller 38 while escaping the small-diameter bending roller 37 toward an arrow mark, as shown in Fig (b).
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