Patent GB-1524421-A (GB)
Title: Traversing mechanism
IPC: B65H54/28
Filed: 1976-08-04
Abstract: 1524421 Traverse means REPCO RESEARCH PTY Ltd 4 Aug 1976 [4 Aug 1975] 32510/76 Heading DIJ [Also in Division B3] A yarn winding device of the kind having a traverse mechanism comprising an endless belt or chain (and hereinafter referred to as a belt), a movable carriage 24, Fig. 4, positioned between the two runs 11, 12 of the belt; a rotatable element 13 on the carriage 24, the element 13 having a plurality of radially projecting lobes 16 arranged such that when one of the lobes 16 engages and locks with run 11 of the belt no lobe engages the run 12; and when one of the lobes 16a, Fig. 6, engages and locks with run 12 of the belt no lobe engages the run 11; is characterized in that the rotation of the element 13 is controlled by an escapement slidably mounted on the carriage 24. In Figs. 3 to 6 the carriage 4 has two pillars 25 on which is slidably mounted a loop-shaped escapement 23 having elongated slots 28 in opposite walls. In Fig. 4 lobe 16 grips the belt run 11 and lobe 16b abuts against the upper wall of the escapement 23 to prevent the element 13 from rotating. When the carriage reaches the right hand end of its travel the escapement 23 abuts against a spring 20 and this causes the escapement to commence to slide towards the left as in Fig. 5. This permits lobe 16b to pass up through the upper slot 28 of the escapement 23 and the element 13 can then rotate such that lobe 16 leaves the run 11 of the belt and lobe 16a, Fig. 6, engages the lower run 12 of the belt. As the movement of the escapement 23 to the left is completed the lower wall of the escapement intercepts lobe 16c of the element 13 and rotation of the element 13 then stops. Two other forms of escapement are described and illustrated, each employing an element 13 having an odd number of lobes. Spring stops 20. The spring stops 20 may be coated with a noise dampening material such as polyurethane. Alternatively the spring stops shown may be replaced by slidable members resiliently urged towards the carriage 24 by coil springs or other means. The slidable members can be omitted and the coil springs themselves used as the spring stops. Traverse length. Each stop 20 may be mounted on a block that can be slid along a guide bar and then be clamped in position. This adjusts the traverse length. Alternatively the stops 20 may be on separate racks driven by a common pinion. Speed Control. The belt may pass around a drive pulley, Fig. 9 (not shown), comprising two co-axial plates that can be moved towards and away from each other, the plates having sloping side surfaces to define a V- groove therebetween. Relative axial movement of the plates thus varies the effective diameter of the drive pulley. Filament Guide. In Fig. 3 the filament guide 5 comprises a part 24 that is secured by screws 26 to the two pillars 25, and a part 38 that is inclined towards the package being wound, the part 38 having a yarn guide 39 that is positioned close to the nip between the package being wound and a drive roller therefore. Secured to the part 24 is a plate 19 curved at its upper and lower ends 14, 15 so as to form backing surfaces 17, 18 against which the cable can be clamped by the lobes on the rotatable element 13, see also Figs. 5 and 6. In a modified filament guide, Fig. 8 (not shown), the surfaces 17, 18 are integral with the part 24.