GB969775A - Improvements in delivery package control mechanisms for yarn winding machines - Google Patents

Abstract

969, 775. Winding yarns; stop-motions. LEESONA CORPORATION. May 18, 1961 [May 19, 1960], No. 18124/61. Headings DID and D1J. A machine for winding yarn on a rotating package P, Fig. 1, and wherein the package P is rotated by frictional contact with a drive roll D and is supported on an arm 38 capable of moving the package P from its operative position engaging with the drive roll D to an inoperative position spaced away from the drive roll D comprises (a) a shoulder 48 on a pivoted latch 44 for engaging a pin 50 on the arm 38 to latch the arm 38 in its operative position during normal winding, (b) a braking member B for detecting the presence of yarn if wound on the roll D instead of on the package P, (c) a feeler arm 100 for detecting an interruption in the flow of yarn to the package, (d) means 186, 214 for detecting the completion of a package, and (e) means operable in response to any of said detecting means for disengaging the latch 44 from the arm 38 so that the arm 38 can move the package P away from the drive roll. Detecting winding on drive roll D. If the yarn commences to wind on to the drive roll D the yarn eventually pushes against the brake member B to cause the pivoted latch 44 to turn clockwise about its pivot 42 and so release the pin 50 on the arm 38 from the holding effect of the shoulder 48 on the latch 44. The package P then falls backwardly to a position in which it rests on the braking member B and out of driving engagement with the drive roll D. Detecting interruption of yarn flow. As the yarn is fed to the driving drum D it passes over and holds down the cranked end of an upwardly biased yarn detecting arm 100. Upon failure of the yarn the arm 100 moves upwardly and, through various linkages and shafts, causes a shaft 72 to rotate a crank 70 anticlockwise to raise a slotted link 64 connected to the pivoted latch 44 such that the latch 44 is turned clockwise to release the arm 38. Detecting completion of package. Pivoted at the upper end of the arm 38, about a shaft 36, in a support 34 for the package P. The support 34 is associated with a plate 180 that is angularly adjustable about the shaft 36 to a desired setting according to a scale 214 on the support 34. As the package P grows in diameter the support 34 and plate 180 are turned clockwise about the shaft 36 and during this period an arcuate surface 186 on the plate 180 slides over one end 208 of a latch 196 pivoted at 198 on the arm 38. The latch 196 is pivoted anticlockwise by a spring. The setting of the plate 180 is such that when the package P has reached its desired size, the arcuate surface 186 moves past the end 208 of the latch 196 and the end 208 then moves up into a recess in the plate 180. This movement causes the other end 202 of the latch 196 to move downwardly and, in so doing, engage and force the pivoted latch 44 to turn clockwise to release the arm 38. Should this mechanism fail to operate a safety feature comprises an arm 182, on the plate 180, that has a lug 184 (not shown) at its lower end. Continued growth of the package P causes continued rotation of the plate 180 until eventually, the lug 184 moves under the arm 200 of the latch 196 to force it to rotate anticlockwise and so actuate the latch 44 to release the arm 38. Yarn cutting mechanism. The machine includes a combined slub clearing and yarn severing device 274. A lever 270, for operating the yarn cutting knife, is rendered inoperative when the arm 38 is released as a result of the yarn detecting arm 100 sensing a break in the yarn, and such that the lever 270 is operated if the arm 38 is released as a result of yarn being wound on the driving drum D or on the completion of the package P. Starting lever. A lever 280 is provided whereby the package P, or a fresh tube on the winding mandrel 24, can be rocked back on to the driving drum D. One revolution clutch. The drive for the main control shaft 90, Fig. 6, is from a notched disc 140 that is continually rotated about a bushing 142 on the shaft 90. Coupled to the shaft 90 is a disc 154 carrying a pivoted driver-pawl 158 such that the pawl can be allowed to engage in a notch 162 in the disc 140 to cause the disc 154 to be driven by the disc 140. The disc 140 carries a number of pins 150. When the thread breaks the lever 100, Fig. 1, swings upwardly to rock shaft 108 clockwise and so push a pendant 124 on arm 114 downwardly to a position where it will be rocked clockwise by a passing pin 50, and this rocking movement of the pendent 124 will rock a latch lever 126 anticlockwise. In its undeflected position the latch lever 126 serves to hold the driving-pawl 158 out of engagement with the notches 162 of the rotating plate 140. As the latch lever 126 is rocked anticlockwise the driver-pawl 158 is pulled by the spring 164 into engagement with a notch 162 in the disc 140, and the driverpawl 158 and the disc 154 then rotate with the disc 140 and so rotate the shaft 90. To ensure that only one revolution of the disc 154 takes place the driver-pawl beak 167, Fig. 7, assumes a setting just ahead of a radial shoulder 174 in the disc 154, as the disc rotates anticlockwise in Fig. 7, and when a single revolution is completed the beak 167 re-establishes contact with the latch lever 126. As the latch lever is still in engagement with a notch 162 in the disc 140 the disc 154 continues to move thus causing the driverpawl 158 to be pivoted outwardly from the notch 162 since the pawl 158 can no longer move with the disc 154. When the driver-pawl 158 has been removed from a notch 162 in the disc 140 this causes the drive to the shaft 9 to be stopped. Specifications 704,931 and 969,776 are referred to.