| 摘要 |
PROBLEM TO BE SOLVED: To provide a paper bobbin capable of being easily assembled, maintaining sufficient assemble strength, and capable of reducing material cost and weight. SOLUTION: This paper bobbin comprises a body member 1 formed by winding a paper band plate in a shape of a cylinder, and left and right flange parts 2 and 2' constituted by a paper disk. Fitting protrusion pieces 4 and 4' are provided on left and right side edges of the body member along the axial direction. The fitting protrusion pieces are inserted into a fitting groove 8 formed on the left and right flange parts from the inside to the outside. A tip part thereof is folded back and is inserted and fitted into a fitting hole 10 provided adjacent to the fitting groove 8. COPYRIGHT: (C)2003,JPO
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