GB581748A - An improved method for the automatic doffing of tubular cops of thread wound on a cop winding machine - Google Patents

Abstract

581,748. Winding cops. MASCHINENFABRIK SCHWEITER AKT.-GES. Nov. 16, 1943, No. 19088. Convention date, Nov. 16, 1942. [Class 120 (ii)] A method of automatically doffing cops of thread wound on a cop winding machine is characterised in that the thread, after the spindle and thread guide have come to rest, is seized, above the wound cop which has been pushed off the spindle into a receiving bowl, by means of a spindle point provided with notches and gripped between that point and a pusher member, whereupon the thread is severed above the ejected cop, the end of the thread clamped by the spindle point forming a loop projecting from the interior of the new cop being wound. During normal winding, a clutch 4, 5 on the main driving shaft 2 is automatically engaged and the thread 34, guided by a thread-guide 35, reciprocated through a worm wheel 4, is wound into a tubular cop on the spindle 9. As the cop 37<1> increases in size, it is pushed forward by a pressure roller 38, the spindle 9, slide 10 and the support 21, for the other end of the spindle 9, moving with it. A clutch 104, 105 in a gear box 1 is opened and a ratchet pawl 110 is released to allow a draw rope 22, weighted at 24 to draw the spindle-supporting slide 10 and the end-support 21 together, to unwind from a drum 31 about which one end of the rope 22 is wound. A bolt, carrying a ropeclamping head 81, is moved outwardly so that the rope 22 may freely move through a bore in the bolt. The cam shaft 45, carrying cams 117, 119, 112, 99, 84, 77 and 75, which govern the automatic operation of the machine, is at rest. The shaft 45 can, however, be rotated through a loose wheel 44 driven by the shaft 2 when a spring- pressed pawl is allowed to move to engage one of a series of pins 46 thus driving a wheel 47 fixed to the shaft 45. Fixed to the rope 22, is an additional weight 33 which always tends to draw the spindle support 21 and spindle 9 backwardly thus maintaining pressure between the cop 37' and the roller 38. This weight 33 may be varied to produce a different pressure so that the hardness of the cop may be varied. Upon completion of a cop the cop support 21 contacts an adjustable ring on a rod which turns a shaft 42 to release the pawl to set the cam shaft 45 in motion. The cams'thereon then effect the following operations in sequence:-(1) the cam 75 opens the clutch 4, 5 thus stopping the rotation of the spindle 9 and the reciprocation of the thread guide 35(2) the cam 117, through the lever 115, turns the pressure roller 38 away from: the cop. (3) the cam 77 allows the spring-pressed bolt head 81 to move inwardly thereby clamping the rope 22 against the gear box 1 to maintain the cop support 21 in its outermost position. (4) the cam 119 through a lever train 122, 123 turns a bowl 124 into a horizontal position under the cop. (5) the cam 99 re-engages the clutch 104, 105 to rotate the rope-winding wheel 31 to draw the spindle 9 backwards thus allowing the cop 37<1> to be gradually pushed off the receding spindle. (6) the cam 112 releases the ratchet 110 so that when the clutch 104, 105 is disengaged, the wheel 31 will be prevented from rotating thus keeping the spindle 9 in its rearmost position. (7) the driving pawl, after about a quarter rev. of the cam shaft 45, is removed from contact with the driving pin 46 and the shaft 45 is stopped. The clutch 104, 105, however, is still engaged and allows the rope 22 to be further wound up on to the drum 31 whereby spindle 9 is completely withdrawn from the cop 37<1> which is therefore allowed to fall into the bowl 124. Just before reaching the rearmost position, the slide 10 carrying one end of the spindle 9 makes contact with a bar 64 to turn the lever 61 attached to the shaft 42 whereby the cam 109 thereon disengages the clutch 104, 105 and releases a pawl to set the cam shaft 45 again in motion. (8) the cam 99 pushes the clutch portion 104 further away from the portion 105 to save wear of teeth. (9) the cam 117 now brings the pressure roller 38 again into position. (10) the cam 77 presses the bolt head 81 outwardly thus releasing the rope 22. This allows the spindle-end support 21 to move towards the notched end of. the spindle 9. (11) the cam 84, through a lever system, moves the thread-cutting devices 90, 91 to seize the thread 34 between their cutting edges. (12) the cam 112 now allows the rope 22 to unwind from the wheel 31 whereby the spindle 9 advances to clamp the thread 34 between its notched end and the support 21. (13) the cam 84 now further moves the cutting device 90, 91 to sever the thread. (14) the cam 119 now turns the bowl 124 so that the cop lying therein can roll off into a collecting trough. (15) the cam 75 now closes the clutch 4, 5 so that the spindle 9 and the thread guide 35 are normally driven for a new wind. (16) the cam shaft 45 is again brought to rest by disengagement of its driving pawl. Specification 581,759 is referred to.