Method and apparatus for automatically changing bobbins and winding yarn continuously

Claim 1

In an apparatus for automatically changing bobbins and winding a yarn thereupon continuously which comprises a turnable turret on which a plurality of bobbin holders for holding bobbins are rotatably mounted, means for rotating bobbins held on said bobbin holders, and traverse means for traversing said yarn upstream of said bobbin holders in the axial direction thereof, means for turning said turret to alternate exchange positions of bobbins held on said bobbin holders between a winding position and a standby position, the improvement wherein said bobbin rotating means comprises a motor, a friction roller driven by said motor for driving said bobbin held on said bobbin holders when the peripheral surface of said bobbin contacts with said friction roller, a power transmission means for transmitting a driving power from said motor to said friction roller, auxiliary means for driving said bobbin for contacting said bobbin with said friction roller and comprising an arm swingably mounted on a shaft of said turret, an auxiliary roller rotatably mounted on said arm, a further motor disposed on a machine frame, and a power transmission means for transmitting driving power of said further motor to said friction roller, and wherein said turret turning means comprises means for turning said turret in a direction opposite to the rotational direction of said bobbins at the time of bobbin exchange, a guide disposed upstream of said yarn traverse means for disengaging said yarn from said yarn traverse means, and a yarn catching groove formed at a peripheral portion of each bobbin.