Bobbin exchange mechanism of a yarn winder

Claim 1

In a winding mechanism provided with a spindle with a bobbin holder for mounting a bobbin and a traverse mechanism having a traverse guide for leading a supplied yarn to a bobbin mounted on said bobbin holder during operation of the winding mechanism and a shifting mechanism for relatively shifting said traverse mechanism from a starting position to a doffing position for doffing a full packaged bobbin, an improvement comprising a guide bar mounted on said traverse mechanism and extending along said bobbin holder to an extent no further than a free end portion of said bobbin holder, said guide bar having a curved portion at a free end thereof, suction means disposed below said spindle in spaced-apart relationship from said bobbin holder, a guiding lever engageable with the supplied yarn for guiding same along a yarn passage between said curved portion of said guide bar and said suction means at a predetermined position for leading the yarn in a contacting condition with a free end portion of said bobbin holder, at least one yarn catcher mounted on said free end portion of said bobbin holder for catching the supplied yarn to initiate winding of the yarn onto the bobbin, a turnable shaft disposed below said traverse mechanism and having said guiding lever mounted thereon, means for turning said shaft together with the turning motion of said traverse mechanism from its doffing position to its starting position to effect corresponding turning of said guiding lever whereby the yarn is caught by said guiding lever and positioned along said yarn passage so that the yarn may be caught by said yarn catcher and then caught by said traverse guide, whereby a winding operation of the yarn onto the bobbin can be commenced.