BROKEN YARN PICKING ARRANGEMENT FOR RING SPINNING MACHINE

An auto piecing unit (1) for piecing broken yarns and its operation are described. The auto piecing unit (1) comprises a gripping arrangement (2) and a suction arrangement (4) connected on a mountingmeans (3) and a scribing arrangement (7). The gripping arrangement (2) holds a cop (5) wound with a broken yarn. The cop (5) is rotated in a direction opposite to a normal winding direction and movedvertically upwards and downwards. During a reverse rotation of the cop (5), the scribing arrangement (7) makes the linear and/or sideways movement to loosen and disentangle the broken yarn end. Upon loosening and disentangling the broken yarn, the suction arrangement (4) is positioned over the cop (5) to suck the broken yarn for a piecing operation. 本发明描述了一种用于接合断纱的自动接合设备(1)以及其操作方法。所述自动接合设备(1)包括连接到安装构件(3)的夹持装置(2)和抽吸装置(4)，以及划线装置(7)。所述夹持装置(2)保持缠绕有断纱的纡子(5)。纡子(5)以与正常的缠绕方向相反的方向转动并且竖直地向上和向下移动。在纡子(5)的反向转动过程中，划线装置(7)进行线性和/或侧向运动，以松动和解绕断纱端头。一旦松动和解绕断纱，抽吸装置(4)被设置在纡子(5)的上方，以抽吸用于接合操作的断纱。