Patent GB-1455906-A (GB)
Title: Textile winding arrangements
IPC: B65H67/08
Filed: 1974-01-30
Abstract: 1455906 Continuous winding machines MASCHINENFABRIK RIETER AG 30 Jan 1974 [2 Feb 1973] 04323/74 Addition to 1332182 Heading D1J The invention relates to an improvement of the invention set forth in Specification 1332182. Specification 1332182 relates to a winding method in which there is a friction drive cylinder 34, Fig. 13, and two bobbin tubes 20. 20' mounted on an arm 9 that is rotatable about an axis 5. The axis 5 is mounted on a carriage. Initially only the tube 20 is in engagement with the cylinder 34, the arm 9 being held against rotation by a retractable pin. As the package 21 and the tube 20 grows in size the axis 5 is moved away from the cylinder 34 by the pressure of the package against the drive cylinder 34, such movement being made against the resistance of hydraulic damping means acting on the carriage. When the package 21 reaches a predetermined size the resultant displacement of the carriage closes a switch that retracts the pin from engagement with the arm 9 to permit the arm to rotate. At the same time pressure is applied to the damping means acting on the carriage to cause the carriage to move back towards the drive drum 34. The pressure of the full package 21 against the drive drum 34 causes the arm 9 to rotate until both the full package 21 and the empty bobbin 20' are jointly in engagement with the drive drum as shown n Fig. 13. Rotation of the arm 9 is effected against braking means acted on by further damping means as described in Specification 1332182. Timimg relays then operate a piston rod to cause a cylinder (13) and rack (7), see Fig. 1 of Specification 1332182 to rotate the axis 5 through a free-wheel clutch and therewith the arm 9. This causes the full package 21 to be lifted off the drive drum and the empty tube 20' to move over the face of the drive drum. Inertia keeps the full package rotating for a while. THE OBJECT OF THE INVENTION OF THIS PATENT OF ADDITION is to cause the arm 9, when the package 21 has been fully wound, to be initially rotated not by the reaction set up by the contact pressure between the full package 21 and the friction drive cylinder 34 as in the case in the parent application, but by other means for example the aforesaid cylinder (13) and rack (7). According to the present invention the function of said other means such as the cylinder (13) and rack (7), is to pivot the arm 9 from the winding position marked A in Fig. 13a, into a predetermined position marked B in which the full package 21 is still in contact with the friction drive cylinder 34 but in which the empty tube 20' has not yet made contact. The remainder of the pivoting movement of the arm 9, until the empty tube 20' is also in contact with the drive cylinder 34, is produced by the described contact pressure. In other respects said other means, or the pivoting mechanism comprising the cylinder (13) and rack (7), performs the function already described in the parent patent, namely to continue pivoting the arm 9 such that the full package 21 is lifted off the drive cylinder 34 and into the bobbin-changing position and such that the the empty tube 20' is moved into the winding position. First embodiment. In a first embodiment the electrical circuit of Fig. 6 of Specification 1332182 is modified to cause the cylinder (13) and rack (7) to cause the pivoting motion of the arm 9 according to the present invention. The previous pneumatic circuit in Fig. 5 of Specification 1332182 and the electrical circuit in Fig. 6 of Specification 1332182 are slightly modified to serve this purpose, the modified circuits being described with respect to Figs. 14 and 15 (not shown) of the present Specification. Second embodiment. In the second embodiment the arm 9 is pivoted from position A to position B by means other than the cylinder (13) and rack (7). In Figs. 17 and 17a there is a lifting cylinder 120 with a piston 121 coupled to a crossmember 122. Crossmember 122 has a groove 123 engaged by a pin 124 on a disc 125 on shaft 5. The disc 125 carries a projection 134 that can act on valves 135 and 136. When the disc 125 is in the setting shown in Fig. 17a it actuates valve 136 to cause pressure to build up in cylinder 120 thus raising the crossmember 122 and causing the disc 125 to rotate in the direction of the arrow such that the wound package is moved from a winding setting at A to the previously mentioned setting at B in which the empty bobbin is moved into the vicinity of the drive cylinder 34. The remaining pivoting movement of the arm 9 until the empty tube 20' is also in contact with the drive cylinder 34 is produced by the aforementioned contact pressure between the package 21 and the drive cylinder 34. After a time delay a cylinder 137 is pressurized to cause a piston 136 to act on the pin 124 to push it along the groove 123 and so turn the disc 125 to the setting shown in Fig. 17 in which the projection 134 acts in the valve 135. Valve 136 now releases the pressure on the piston 121. Actuation of the valve 135 causes the cylinder 126 to be pressurized such that the crossmember 122 is lowered to the setting shown in Fig. 17a at which stage the pin 124 will be at the right hand end of the slot 123. The cylinder 137 is then actuated again to cause the piston 138 to act on a further pin 133 on the disc 125 to move it from left to right as in Fig. 17a. The disc 125 has then completed one revolution, the various stages of its revolution serving to facilitate the desired motions of the arm 9.  The pin 133 is shorter than the pin 124 such that it will not strike against the crossmember 122.