| 摘要 |
PROBLEM TO BE SOLVED: To provide a yarn winding bobbin excellent in reusability, and easy in taking out an end part of yarn from a holding groove.SOLUTION: The yarn winding bobbin 1 comprises a substantially cylindrical core body 2 having an annular flange part 21 in one end part and a surface layer body 3 covering a surface of a core body part 20 except for the annular flange part. Both side surfaces of the holding groove 4 for holding the yarn L are constituted of a part of the circumferential length among the whole mutually facing surfaces of the annular flange part and the surface layer body. One side surface of the holding groove is formed with a side projection part 22A for making a part of the length of the yarn inserted into the holding groove run on, and the other side surface is formed with a side recessed part 30 corresponding to the side projection part. |
