Filament winding device and filament winding method

A filament winding device configured to wind a band shaped bundle around a workpiece, comprising:

• a roller row configured to convey the band-shaped bundle to the workpiece;
• and
• a width adjustment mechanism configured to adjust a width of the band-shaped bundle during conveyance by the roller row in a manner so that the band-shaped bundle is wound around the workpiece adjacently in a widthwise direction of the band-shaped bundle,
• wherein the band-shaped bundle is configured by arranging a plurality of fiber bundles, each of which is a bundle of a plurality of fibers, in the widthwise direction,
• the width adjustment mechanism includes a plurality of width adjustment rollers over which the plurality of fiber bundles pass, respectively,
• the plurality of width adjustment rollers respectively adjust widths of the fiber bundles to adjust the width of the band-shaped bundles, and
• wherein each of the plurality of width adjustment rollers includes:
• a first roller including a first guide groove having an annular shape on an outer peripheral portion of the first roller;
• and
• a second roller disposed on a downstream side of the first roller in a conveyance direction of the fiber bundle and including a second guide groove having an annular shape on an outer peripheral portion of the second roller, and
• wherein each of the plurality of fiber bundles is passed over the first guide groove and the second guide groove of each of the plurality of width adjustment rollers.