| 摘要 |
In order to achieve, even at an increased line speed, joining of bundling members at sections where their winding 5 directions are reversed, the invention provides a method for producing an optical fiber unit by winding at least two bundling members on the outer circumference of an optical fiberbundle formed by bundling apluralityof optical fibers. This method involves: feeding the optical fiber bundle in a 10 feeding direction from a fiber passage member; feeding the bundling members while forming intersection points between two of the bundling members on the outer circumference of the optical fiber bundle by feeding at least one of the bundling members from a bundling member passage part of a rotating 15 member arranged to the outer circumference of the fiber passage member, while causing the rotating member to oscillate, with the feeding direction serving as the axis; and fusion-bonding the bundling members at their intersection points by passing the optical fiber bundle and the bundling 20 members through a heating unit arranged downstream from the fiber passage member and the rotating member in the feeding direction, and thus forming an optical fiber unit in which the winding direction, with respect to the optical fiber bundle, of the at least one of the bundling members is reversed 25 at a fusion-bonded point between the bundling members. |
