Guide apparatus for continuous fiber bundle, winding machine for continuous fiber bundle equipped with the guide apparatus, method for making bobbin by the winding machine, and carbon fiber bobbin made by the method

A method for making a bobbin of a continuous fiber bundle, wherein a plurality of continuous fiber bundles advancing on a passage are guided by guides and wound on the bobbin, which comprises:

• guiding the fiber bundle sequentially by a first guide and a second guide being disposed in a passage through which the fiber bundle is advanced, wherein axis lines of the first and second guides are twisted away from each other in a space,
• guiding the fiber bundle by a parallel guide, which is disposed at a downstream side of the first and second guides on the passage and which has an axis line parallel to that of the bobbin,
• guiding the fiber bundle by a first fixed guide roll, which is disposed at an upstream side of the first guide on the passage, and supplying the fiber bundle to the first and second guides,
• supplying the fiber bundle to the first and second guides in a condition that an axis line of a first fixed guide roll is parallel to an axis line of a bobbin axis,
• guiding the fiber bundle in a twisted sate by the first guide, the first guide comprising a substantially flat guide, which has an axis line thereof arranged so as to cross substantially at a right angle to the axis line of the bobbin,
• between the fixed guide roll and the first guide, twisting the direction of the width of the fiber bundle, from a state that the direction of the width of the fiber bundle is parallel to the bobbin axis to a state on the first guide that the direction of the width of the fiber bundle is at a right angle to the bobbin axis,
• the second guide comprising a conical guide, twisting back to the fiber bundle being advanced in a twisted state on said parallel guide to the same direction as the direction of the fiber bundle when being supplied from the first fixed guide roll, or twisting further in the same direction so as to turn the fiber bundle upside down, and
• stabilizing the position at which the fiber bundle is wound on the bobbin and the width of the fiber bundle, by means of a parallel guide.

A guide apparatus for guiding an advancing continuous fiber bundle used when winding the fiber bundle on a bobbin, which comprises:

• a first guide and a second guide, each of said guides being disposed on a passage on which the fiber bundle is advanced, wherein the axis lines of the guides are twisted away from each other in a space,
• a parallel guide, which is disposed at a downstream side of the pair of the guides on the passage, through which the fiber bundle is guided to the bobbin, and which has the axis line parallel to that of the bobbin,
• the first guide comprising a conical guide on which the fiber bundle is advanced in a twisted state, and which is disposed such that an oblique line with which the fiber bundle contacts first crosses at right angle to the axis line of the bobbin, and
• the second guide comprising a conical guide on which the fiber bundle is advanced in a twisted state, on the parallel guide, the fiber bundle being twisted back to the same direction as the direction of the fiber bundle when it is being supplied, or being twisted further in the same direction thereby turning the fiber bundle upside down,
• wherein the position at which the fiber bundle is wound on the bobbin and the width of the fiber bundle is stabilized by means of the parallel guide.