Residual yarn removing device for various types of roving bobbin

摘要

A plurality of residual yarn removing devices (1a,1b,1c,...) for roving bobbins, which correspond in number to the number of fiber types of residual yarn of the roving bobbins (5A,5B,5C,...) are disposed in a transfer line for transferring the spent roving bobbins from a fine spinning frame (3) to a roving frame (2). The residual yarn removing devices are disposed in series to correspond to the respective fiber types. A control unit is arranged for selectively operating the residual yarn removing device corresponding to the detected fiber type of the residual yarn (11) of the roving bobbin. The residual yarn removing device includes a dust collecting box (54), a lower suction opening (52), and an upper exit opening (56B). A lower air passage (55A) connects the suction opening (52) and an inlet side (56) of the dust collecting box (54). An upper air passage (55B) connects an outlet side of the dust collecting box and the exit opening (56B). A filter (57), which can prevent passage of the removed residual yarn, is disposed in the dust collecting box (54) for partitioning the same into the inlet and outlet sides. A blower (58) is arranged for supplying air flowing from the suction opening (52) through the dust collecting box toward the exit opening (56B).