Patent GB-1012789-A (GB)
Title: Textile machinery
IPC: D01H9/10
Filed: 1964-05-22
Abstract: 1,012,789. Doffing and donning. DEUTSCHER SPINNEREIMASCHINENBAU INGOLSTADT NIEDERLASSUNG DER SCHUBERT & SALZER MASCHINENFABRIK A.G. May 22, 1964 [July 4, 1963], No. 21199/64. Heading D1D. Doffing and donning apparatus for a multispindle spinning or doubling frame comprises a carriage 1 having a clump 7 for gripping full bobbins 30 and means for holding the clamp stationary relative to an associated spindle during doffing. In Figs. 1, 2 the spool clamp 7 is mounted on a rotatable shaft 11 which is arranged to rotate (oscillate or in one direction) during doffing so that as the clamp engages the top of a full spool a component of rotation is equal and opposite to the forward speed of the carriage. In the form in which shaft 11 rotates in one direction three clamping arms are provided. In a further form the clamping arm is carried by a slide on the carriage and is driven against the motion of the carriage during doffing. In another form the clamp is rotatable about a horizontal axis. In Figs. 1 and 2 the carriage 1 is guided by rails 2, 3 and flow engaging, resiliently mounted wheels 4 and is moved at constant speed along the frame by a pinion 6 engaging a rack 5 on the rail 2. The clamp 7 is rotated to bring its clamping elements into engagement with the spool of a full bobbin 30, the clamping elements being actuated by a lever moved by an electromagnet 10. The shaft 11 and clamp 7 are then vertically lifted to take the spool off the spindle and rotated back to their original position whereat the clamping elements release the full bobbin which falls into a chute 31 (see Fig. 1). The full bobbins pass from chute 31 on to a conveyer 30 which deposits them in a container 34 consisting of a loop of cloth 35 which can be wound up by a roller 36. The spool clamping elements comprise, see Fig. 3, a resilient member 8 slideable on a pin 55 mounted on the arm 7. Upon actuation of the electromagnet 10, an arm 9 is pivoted at 59 to compress and expand member 8 between a sliding collar 57 and a head 56 on pin 55 to internally clamp the spool body. In a further form the top of the spool is surrounded by a resilient member which is compressed and expanded to clamp the spool externally; alternatively the top of the spool is surrounded by a turn of a flexible band which is tightened to grip the spool. Empty spools 37 pass from a magazine 38 (see Fig. 1) on the carriage 1, up a conveyor 39 and into a chute 40 (see also Figs. 7 and 8) wherein they fall about a curved surface 41 into an upstanding position at the mouth of a spool holder 42 pivotable about a vertical axis in bearings 43, 44. In a first position of holder 42 (chain-dot lines in Fig. 8) the outermost spool therein is supported at its lower end by a fixed member 49 but as the holder is rotated to give the outermost spool a component of velocity equal and opposite to the speed of the carriage and into the position shown in full lines in Fig. 8, the spool moves from the member 49 and falls on to a spindle 53 whereupon it is given a downward blow by resilient roller 51 mounted on an arm 52 pivotable about a horizontal axis 54. An arm 45 which rotates the holder 42 is moved by a pin 46 on a member 60 which is mounted on and rotated by a shaft 61 to shift the spools along the holder 42.