Patent GB-1031283-A (GB)
Title: Improvements in or relating to automatic yarn winders
Inventor: MATSHUI ISAMU
IPC: B65H67/08
Filed: 1963-05-02
Abstract: 1,031,283. Winding yarns; donning and doffing; supplying bobbins to machines. MURATA KIKAI KABUSHIKI KAISHA and TOYO BOSEKI KABUSHIKI KAISHA. May 2, 1963, No. 17399/63. Headings DID, D1F and D1J. In an automatic winding machine of the kind in which winding units are moved around a closed track and receive a new bobbin at a certain position on the track, there is a feeler 9, Fig. 4, that contacts passing yarn supply bobbins 1 to detect whether there is any residual yarn 8 thereon and, if so, the feeler 9 operates means whereby a finger 5 carried by the winding unit is displaced to a setting in which it cancels the means whereby the yarn supply bobbin would otherwise be doffed and replaced by a fresh supply bobbin, there being automatic means for seeking and tying up any broken ends of each passing unit. The finger 5 is normally moved by cam means to a downward setting as indicated by the broken lines but if the feeler 9 senses residual yarn on  the bobbin 1 it closes a microswitch 12, Fig. 13 (not shown), to cause a solinoid operated lever 18 to lift the finger 5 to an upward setting as indicated in full lines. If the finger 5 is directed upwardly it cancels the subsequent mechanisms that would otherwise cause bobbin doffing and replacement. In Fig. 4 the winding unit is at stage A of Fig. 2 (not shown), and because there is residual yarn 8 on the bobbin 1 the solenoid 14 has caused the lever 18 to move the finger 5 to its upward setting. At this stage a fixed cam plate 38 acts on a roller 39 carried by the winding unit to cause the bobbin 1 to tilt as shown, this tilting motion being performed for each bobbin whether empty or not to facilitate the pulling out of any yarn and thereon by a swinging suction arm that presents such yarn end to a yarn end clamping member 32 (since if residual yarn is found on the bobbin 1 this is due to yarn breakage). The clamping member 32 presents the yarn end to a knotter, the take up package 85, Fig. 6 (not shown), having been temporarily reversed to unwind a yarn length therefrom with the aid of a further suction nozzle 86, the unwound yarn length from the package being also presented to the knotter. Doffing. In Fig. 6 (not shown) the travelling bobbin 1 normally engages an inclined plough 59 that lifts an empty bobbin from its peg 40. At this period the winding unit is at stage B in Fig. 2. If, however, the finger 5 is directed upwardly, as shown, because there is residual yarn 8 on the bobbin 1, this setting of the finger 5 causes a cam plate 51, Fig. 6, and associated linkage to swing the plough 59 away from the path of the bobbin 1 to avoid doffing. Donning and cop supply magazine. The cop supply magazine is opened in response to the detection of an empty bobbin. When a winding unit is at stage C, Fig. 2 (not shown), and the supply bobbin thereon contains residual yarn, the resulting upwardly directed setting of the finger 5 causes the finger to displace a cam plate 60 from the chain-line position to the full-line position, Fig. 7 (not shown), to actuate a linkage system and move a lever 61 downwardly from the broken line position to the full line position. If the lever 61 had been allowed to remain in its upper setting it would have been deflected by a guide roll 24 of the passing winding unit to actuate a linkage mechanism associated with a cop supply magazine 49 to release a fresh yarn supply cop. With the lever 61 in the lower setting it is not contacted by the guide roll 24 and the cop supply magazine 49 is not actuated. At station D, Fig. 2, the roller 39 carried by the passing unit normally engages a plate 76, Fig. 8 (not shown) to tilt the bobbin peg such that it can receive a fresh yarn supply cop 77. If, however, the finger 5 is in its upwardly directed setting it engages a cam plate 72 to cause the cam plate 76 to be swung away from the roller 39 and the winding unit then passes through the station D without tilting. Thus, if a bobbin is empty it is doffed and replaced by a fresh bobbin and if there is residual yarn on the bobbin due to thread breakage it is not doffed but is reconnected to the package being wound. Kink-preventing device. Immediately after knotting has been accomplished, the yarn which has been released from the knotter is drawn into a suction pipe 89, Fig. 18 (not shown), having opposed side slits 90, 90, the two knotted ends of the yarn rising up these slits to prevent entwining of the yarn as would occur in the case of a suction pipe without side slits. At this time, the roll 102 causes the yarn to be wound up on the package 85 and the slack yarn is pulled taut as it is pulled along a separator 91 successively to assume the positions indicated by P, Q,R and S in that order. The separator 91 prevents entanglement of the yarn during winding and imports tension to remove slack and prevent kinks in the yarn.