Filament winding device

A filament winding device configured to include a fiber bundle head that allows a plurality of fiber bundles supplied from a plurality of bobbins to face an outer circumference of a liner and configured to simultaneously wind the plurality of fiber bundles on the liner by relatively rotating the fiber bundle head and the liner, centering on an axis of the liner, the filament winding device comprising:

• a tension adjusting portion configured to collectively adjust tension of the plurality of fiber bundles unreeled from the plurality of bobbins;
• and
• an unreeling failure detecting portion configured to individually detect unreeling failure of the fiber bundles on the bobbins for each bobbin,
• wherein the unreeling failure detecting portions are configured to be individually provided in accordance with the plurality of bobbins and configured to include a detection piece configured to change from a standby position to a detection position, upon reception of the tension of the fiber bundle unreeled, and a detection portion configured to detect that the detection piece is positioned at the detection position.