Wire body winding device and wire body manufacturing method

An optical fiber manufacturing method, comprising:

• locking an optical fiber by a locking portion provided on a rotating plate that rotates together with a drive shaft at a time of bobbin switching;
• and
• continuously winding the optical fiber while switching the bobbin that is detachably attached to the rotating plate,
• wherein the locking portion includes
• a base member fixed to the rotating plate and
• a guide member disposed so as to overlap the base member,
• the locking portion has a base end portion at which the guide member is fixed to the base member, and a tip end portion configured to receive the optical fiber,
• the guide member has a gradient in which the distance between the base member and the guide member increases from the base end portion toward the tip end portion,
• the base member has a flat portion with no gradient,
• the gradient of the guide member with respect to the base member is 1/200 or more and 1/50 or less, and
• a distance between the base member and the guide member increases gradually from the base end portion toward the tip end portion, and the optical fiber is held and locked between the base member and the guide member at the time of the bobbin switching.