| 摘要 |
PROBLEM TO BE SOLVED: To provide a winding core that has sufficient durability in use and that can be inexpensively manufactured by small-scale and simple equipment.SOLUTION: The winding core includes a core material 1 and an enclosure member 2. In the core material 1, a plurality of cardboard materials are stacked. The enclosure member 2 surrounds an outer peripheral part of the core material 1 around a horizontal axis. The enclosure member 2 has a fold part 20 provided in a position to almost agree with a location abutting on a corner part R of the outer peripheral part of the core material 1, on an inner peripheral part when surrounding the core material 1. |
