| 摘要 |
PROBLEM TO BE SOLVED: To provide a vessel surely returnable to an original shape from an expanded shape.SOLUTION: Deformation expected areas 20A, 20B and 20C are juxtaposed over the whole periphery of a trunk part 20, and the adjacent deformation expected areas are partitioned by a main ridge-folding ruled line 21. Laterally extending main bottom-folding ruled lines 21a-22c are formed in the respective deformation expected areas, and thereby, the deformation expected areas comprise first surface parts 25x and 28x of reaching a peripheral ede part of a bottom part 10 from the main bottom-folding riled lines 22a-22c and second surface parts 25y and 28y of reaching an opening peripheral edge part 29 from the main bottom-folding ruled lines 22a- 22c. In one deformation expected area 20C of the adjacent deformation expected areas, one end of the laterally extending main bottom-folding ruled line 22c is positioned on an inflection point P5 of the main ridge-folding ruled line 21. In the other deformation expected area 20A of the adjacent deformation expected areas, first and second sub-bottom-folding ruled lines 23a and 24a are formed for respectively connecting one end of the laterally extending main bottom-folding ruled line 20a and both ends of the main ridge-folding ruled line 21.SELECTED DRAWING: Figure 2 |
