Yarn path guide, traversing device of fiber bundle and system for producing fiber bundle package

A fiber bundle traversing device, comprising one or more yarn path guides including a final yarn path guide, a traverse guide that guides the fiber bundle and a traverse mechanism of the traverse guide, that traverses the fiber bundle by reciprocating the traverse guide in a direction of a bobbin rotating shaft by the traverse mechanism,

• wherein the traverse guide has a sole upper guide roll that guides traveling yarn comprising a supporting member that supports the upper guide roll, the supporting member having a rotating shaft at a position twisted at a right angle to the rotating shaft of the upper guide roll,
• wherein the rotating shaft of the upper guide roll is arranged on a downstream side of the shaft of the supporting member, and
• wherein a fiber bundle is guided automatically in an original yarn path direction by inclining the upper guide roll with respect to the yarn path when the upper guide roll is rotating around the rotating shaft of the supporting member in response to variation of the yarn path for guiding the fiber bundle deviating from the yarn path in the original yarn path direction, and the upper guide roll of which the roll rotating shaft is arranged at a position twisted substantially at a right angle to a bobbin rotating shaft and a final guide roll of which the roll rotating shaft is arranged substantially parallel to the bobbin rotating shafts, when an angle between the rotating shaft of the supporting member and the original yarn path entering the upper guide roll from the final yarn path guide is α and an angle between the rotating shaft of the supporting member and the original yarn path exiting the upper guide roll is β, and α and β have the relation of α+β<180°.