Patent GB-1174441-A (GB)
Title: Automatic Yarn Winding Machines.
IPC: B65H67/04
Filed: 1966-11-21
Abstract: 1,174,441 Doffing, apparatus; removing packages from machines. MURATA MACHINERY Ltd. and TOYO BOSEKI K.K. 21 Nov., 1966 [8 April, 1966], No. 52087/66. Headings D1F and D1J. The winding units 2, Fig. 1, travel along a looped path 1 that extends at one end around a spindle 6. Rotating round spindle 6 are a plurality of doffins units PL that move in synchronism with the winding units 2 and are capable of receiving completed packages 91 when discharged from the winding units. When a package has received yarn from a predetermined number of supply cops 150, Fig. 3, moving with the winding units 2, the package is deemed to be fully wound and the cop peg 149 tilts, by known means to a setting as shown in full lines in Fig. 3 and a roller 252 carried by the peg 149 then actuates, in turn, micro-switches 253 to 256, Fig. 1, to initiate the actions explained hereinafter. Winding Yarn Around End of Completed Package. When a package is fully-wound the yarn is carried to an end portion of the package so that there may be some turns of yarn at that end before the yarn is cut. The package is normally in contact with a grooved traversing drum 126 but when the package is complete and winding unit 2 moves to a setting in which the first micro-switch 253 is actuated, a solanoid (73), Fig. 4 (not shown) is energised to withdraw a stop lever 70, Fig. 3, from a setting in which it holds a driven roller 61 and an arm 99 in an operative setting. A spring 64 then causes the driven roller 61 to swing to a setting shown in full lines in which it engages and rotates the package 91 clockwise and causes the arm 99 to swing to a setting in which it moves the yarn to one end of the package 91. Several end turns are thus wound on the package. The roller 61 and arm 99 are mounted on a stationary plate and eventually a cam 78 on a disc 16 rotatable on the spindle 6, displaces a roll 65 forming part of the linkage associated with the roller 61 and the arm 99 to cause the roller 61 and the arm 99 to swing back to their inoperative settings and be held down by the stop lever 70. A brake plate 103 is provided to stop rotation of the package 91. The revolutions of the disc 16 are used to drive the roller 61 continuously. Cam Mechanism for discharging a whole package from the cradle arms of a winding unit. Each winding unit 2 includes a pair of arms 116, 117, Figs. 7 and 11, between which a bobbin 58 of the package is mounted. When a roller 107 on the winding unit 2 engages a plate cam 106, a. linkage system causes the arms 116, 117 to rise and lift the package 91 off the grooved traverse drum 126. In the raised setting of the arms, the trailing arm 117, which is longer than the leading arm 116, is in a setting where it will abut against a shoulder 122 of a rail cam. On engagement with the shoulder 122, the arm 117 is moved away from the arm 116. As the winding unit 2 continues its motion the leading end of the package engages a plate 123 that forces the bobbin 58 off the arm 116 to release the package. Before the arms 116, 117 are permitted to close together again an empty bobbin 58 is placed between arms 116, 117 as hereinafter described. When the already mentioned roller 252 engages micro-switch 255 it causes a solanoid 133, Fig. 11, to be temporarily energised to cause a package transfer plate 129 to swing forwardly and lift a doffed package on to a plate 42 of a doffing unit PL. The Doffing Units PL. Each doffing unit PL includes a pair of catch plates 26 and 42. It will be noted from Fig. 11 that the catch plate 42 can be set to a level at which it receives a doffed package when the transfer plate 129 swings forwardly. Beneath the plate 42 are a pair of bare-bobbin holders 57' that have been supplied with a bare-bobbin 58 by means described hereinafter. Means are provided to swing the plate 42 upwardly and as it does so the bare-bobbin 58 becomes aligned with bobbin-bearing centres 119, 119' on the arms and is gripped by said centres, so removing it from the holders 57'. As the plate 42 continues its upward swing it becomes positioned over the plate 26 and so rolls the package on to the plate 26. Carrying Doffed Packages out of Winding Machine. In Fig. 20 an elevator 157 reciprocates continually up and down a pair of pillars 154 by means of power derived from the rotating disc 16. The elevator 157 carries a plate 156 that is spring biased upwardly when the elevator is at a lower setting and the plate is then positioned to receive a package 91 rolling off the catchplate 26. As the elevator rises the plate 156 strikes a stop 178 to cause the plate 156 to incline downwardly and discharge the package on to a transferring conduit 179. In a modified embodiment, Fig. 22 (not shown), package elevators (189) are moved up and incline by an endless chain (188), each elevator in its lower setting having a package receiver (195) that is aligned with catchplate 26 and which, at its upper setting, discharges the package down a conduit (196). Cam Mechanism for Operating the Catchplates 26 and 42. The levers that control the motion of the catchplates 26 and 42 are controlled by a roller 22 moving relatively to a cylindrical cam 19, Fig. 2, extending around the spindle 6. As can be seen from Fig. 2, the cam 19 has an undulated portion A to G. If a package is not complete this undulated portion A to G is bridged by horizontal bars 28, 29, 30 so that no motion is transmitted to the roller 22. If a package is to be received by the catchplate 42, the roller 252 carried by the winding unit operates micro-switch 154 to energise a solanoid 40 and cause rod 28 to be raised. The roller 22 can then move over the undulated portion and can pass under the bar 29 since the bar 29 simply rests on a pin 37. Supplying a Bare Bobbin to the Doffing Unit. In Fig. 24 the empty bobbins 58 are in a hopper 203 having a lower outlet 221. Power from the rotating discs 16 rotates cams 216, 217, 218 that cause: a Z-shaped plate 223 to rock in a manner permitting a bobbin to drop down and be delivered onto plates 249, 250. A lever 207 then swings upwardly to raise the bobbin' and place it in the bobbin holders 57 on the plate 42. At this stage the plate 42 is in its uppermost setting as indicated in broken lines in Fig. 11. The further lever 211 moves a plow member 210 in the hopper 230 to stir the bare bobbins. Cutting yarn between supply cop and full package. Fig. 17 shows a doffed package on catch plate 26 and a new bobbin 58. When a winding unit 2 with a full package 91 passes the micro-switch 256, the switch causes a solanoid 148 to actuate a cutter 145 to sever the yarn 151, and a lever 146 swings downwardly to transfer the yarn onto the new bobbin 58. An air jet (not shown in Fig. 17) blows the yarn end onto the bare bobbin.