Fold line design method, design device, and non-transitory computer readable medium

A design device configured to design a fold line for folding a target member, comprising:

• an input device unit configured to input information relating to a shape of the target member;
• at least one processor configured to design the fold line on the basis of the information inputted by the input device;
• and
• an output device configured to output a result designed by the at least one processor,
• wherein the at least one processor is configured to:
• set a ribbase on a plane along a main surface of the target member,
• design a plurality of first fold lines each of which extend radially from the ribbase as a starting point, and in which a mountain fold line and a valley fold line are alternately disposed,
• design a plurality of second fold lines which respectively connect the first fold lines adjacent to each other among the plurality of first fold lines, and constitute one continuous fold line,
• correct the plurality of second fold lines so that a rotation axis of the target member when being folded becomes different between the plurality of the second fold lines after designing of the plurality of second fold lines, and
• in correspondence with the correction, correct fold lines on a side far away from the ribbase in comparison to intersection points with the second fold lines in each of the plurality of first fold lines.

A non-transitory computer readable medium storing a design program causing a computer to function as a design device configured to design a fold line for folding a target member, comprising:

• a shape information acquisition function of acquiring information relating to a shape of the target member;
• a design function of designing the fold line on the basis of the information acquired by the shape information acquisition function;
• and
• an output function of outputting a result designed by the design function, wherein the design function performs
• setting a ribbase on a plane along a main surface of the target member,
• designing a plurality of first fold lines each of which extend radially from the ribbase as a starting point, and in which a mountain fold line and a valley fold line are alternately disposed,
• designing a plurality of second fold lines which respectively connect the first fold lines adjacent to each other among the plurality of first fold lines, and constitute one continuous fold line,
• correcting the plurality of second fold lines so that a rotation axis of the target member when being folded becomes different between the plurality of the second fold lines after designing of the plurality of second fold lines, and
• in correspondence with the correction, correcting fold lines on a side far away from the ribbase in comparison to intersection points with the second fold lines in each of the plurality of first fold lines.