Patent GB-870857-A (GB)
Title: Improvements in or relating to thread or yarn winding machines
IPC: B65H54/24
Filed: 1957-07-26
Abstract: 870,857. Winding yarns. REINERS, W. July 26, 1957 [Aug. 3, 1956], No. 23734/57. Class 120(2) An automatic thread winding machine having a plurality of winding stations each with means for mounting a take-up spool and a supply bobbin includes a single means to replace exhausted supply bobbins by full bobbins, a single knot tying means to tie the ends of the threads on the take up spools, means individual to each winding station to replace fully wound take-up spools by empty spools and means to produce relative movement of the bobbin replacement and knot tying means and the winding stations to locate each station in succession at a position at which the bobbin replacement and knot tying means may become operative for that station. In the embodiment shown the machine comprises a base 7 from which extends a column 8 on which is journalled a hub 10 formed with radial brackets 12. Each bracket 12 carries a winding lead 14, a shoot 17, a thread tensioner 18 and a supply bobbin carrier pin 19. A stationary support 24 carries a supply bobbin magazine 6, an automatic knot tying device 29, a tubular suction arm 30 pivoted at 31 and a thread gripper arm 32 pivoted at 33. Mounted for rotation at the lower end of column 8 is a circular table 48 which carries a plurality of boxes 34 corresponding in number to the winding heads 14. In operation starting with the delivery of a full supply bobbin 20<SP>11</SP> from magazine 6 to the unwinding station the bobbin slides down the plate 27 to the position 20<SP>1</SP> where it impinges on pin 19 and is swung to the position 20. The leading end F of the thread is held at 28 where it is engageable by the gripper arm 32 to be swung upward through arc 33<SP>1</SP> and drawn over the tensioner 18 and presented to the knot tying device 5 at F<SP>11</SP>. Whilst this is taking place the pin 16 is rotated a few turns in the reverse direction so as to face the trailing end portion which is then engaged by the suction arm 30 and swung downwardly through arc 31<SP>1</SP> to the knotting device 5 where it is united with the leading end F<SP>1</SP>. For the operation of replacing an exhausted supply bobbin or for repairing a thread breakage a single sensing device (not shown) is provided on standard 24 which detects the absence of a thread between a supply bobbin and the pin. This sensing is carried out for each winding lead in turn as it passes the standard 24. When the absence of a thread is detected due to the exhaustion of a supply bobbin the latter is returned to the position 20 whereupon the ejector 25 strips it from pin 19 and the bobbin drops into compartment 35 and a full bobbin is delivered from the magazine 6. The replacement of a completed pin by an empty tube 49 can be effected at any time in the rotary movement the completed pins, on release, dropping down shoot 17 into the passage 37 where they are pushed along by a pusher 44 into the box 34. A lock system may be provided which prevents the actuation of the supply bobbin replacement mechanism when the associated pin is being or is about to be replaced by a new pin tube. Alternatively the lock may be arranged temporarily to interrupt operation of the knot tying device 5 or the rotary movement of the winding stations. To eliminate the requirement of such a lock system the rotation of the brackets 12 may be arranged to be such that each winding station will at least twice be located opposite the standard 24 during the time taken to unwind a full supply bobbin.