| 摘要 |
PURPOSE: To open and fold a map by picking one end of it one-handed. CONSTITUTION: A center folding line 2 is provided and two further folding lines 8-17 are extended to either side of the center folding line 2 in a state where this map 1 is opened and crossed with the center folding line 2 at plural respective intersections 3-7 with intervals. The further folding lines 8-17 extended from one intersection on the center folding line 2 hold an angle 90 deg. with each other and hold the same angle with the center folding line 2. The map 1 is alternately folded in an opposite direction to the further folding lines 8-17 and all map parts are successively piled up in the state where they are all folded.
|
