Yarn winding device and yarn unwinding method

摘要

A yarn unwinding assisting device (20) of a yarn winding unit (1) includes a movable cylinder (31) that, during yarn unwinding from a yarn feeding bobbin (8), is to be put on to cap an end portion on a side from which a yarn is unwound of the yarn feeding bobbin (8) to thereby regulate a bulge of a curved path of the yarn. An inner diameter of the movable cylinder (31) is greater than or equal to 28 mm and less than or equal to 30 mm.