| 摘要 |
PROBLEM TO BE SOLVED: To evenly extend a sheet in each direction without needing special control.SOLUTION: A sheet extension device 1 includes: three or more movable bodies 7 each of which has a stationary part arranged evenly in a circumferential direction with a predetermined axis A, vertical to a substantially same plane, as a center in the plane and fixing a part of a sheet, and which are provided movably in a radial direction with the axis A as the center between a position close to the axis A and a position away from the axis A; and movement mechanisms 81, 82 which moves the three or more movable bodies 7 in the same direction of the radial direction by the same distance while interlocking with each other. |
