| 摘要 |
An inner rotor 5 has a recess 7 formed at a position corresponding to a navel 6 and the recess 7 has a taper surface 7a formed to the peripheral edge thereof. The end surface 6c of the navel 6 can be moved together with a support member 12 to an ordinary spinning position where it can be engaged with a thread Y drawn out through a thread guide and to a thread piecing position where it cannot be engaged therewith. When the thread is pieced, the navel 6 is disposed at the thread piecing position and after a seed thread is introduced into an outer rotor 2 from a thread drawing-out path 6b in the state that both the rotors 2, 5 are rotated, a fiber bundle in a fiber collecting portion 2a is drawn out together with the seed thread and a thread is spun without passing through the thread guide. Thereafter, the navel 6 is moved to the ordinary spinning position. While the navel 6 is being moved, the end surface 6c thereof is engaged with the thread Y which is introduced into the thread guide opened on the opening side of the outer rotor 2, so that operation proceeds to ordinary spinning. With this arrangement, the extreme end of the seed thread is caused to securely reach up to the fiber bundling unit of the outer rotor in thread piecing, whereby a spinning state in the thread piecing can smoothly proceed to the ordinary spinning state.
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