Patent GB-937790-A (GB)
Title: Bobbin-arranging apparatus
IPC: D01H9/10
Filed: 1961-10-19
Abstract: 937,790. Doffing apparatus. TOYO BOSIKI KABUSHIKI KAISHA, and HOWA KOGYO KABUSHIKI KAISHA. Oct. 19, 1961 [Oct. 20, 1960], No. 37574/61. Classes 120 (2) and 120 (3). [Also in Groups XVII, XXIV and XXX] Apparatus associated with an automatic doffer for dealing with filled bobbins removed group by group by the doffer, comprises means for receiving a group of doffed filled bobbins in side-by-side relationship, means for conveying the group toward and below an upright magazine, and means for lifting and transferring the group to the magazine in side-by-side and stacked-up relationship. In Fig. 1, the magazine and the doffer 1 are mounted in a carriage moved step-by-step along a ring-spinning frame as a groove 3 in a rotating drum 2 engages pins arranged along the frame. The doffer comprises means 11 for releasing filled bobbins, 12 for pushing yarns to one side, 13 for gripping filled bobbins, 14 for severing the yarn, 15 for supplying empty bobbins, and 16 for pressing empty bobbins on to the spindles. Filled bobbins descend an inclined shoot on to carriers 32, Fig. 3, corresponding in number to the spindles doffed at one operation of the doffer, and moved along guides 38, 40 by a rotating screwthreaded shaft 31. The thread has portions of coarse and fine pitch; in the region of the former the guides support the carriers in inclined position to facilitate their reception from the shoot, while in the region of the latter the guides bring the carrier to a horizontal position beneath the magazine on lifting members 65, 66. When all the bobbins of the group are brought on to the lifting members, the latter are raised to push the bobbins up into the magazine past spring-urged detents which stop the bobbins already in the magazine from falling. The walls of the magazine have vertical grooves corresponding in number to the bobbins pushed into the magazine at one time. Drive to shaft 31 and to the lifting-members 65, 66. Shaft 31 is driven in one direction or the other according to which of two bevel gears 72, 73, Fig. 9, is clutched to a constantlydriven shaft 70; the clutches are operated by shift-levers 80, 81 secured to shafts 82, 83 rotatable against the pull of springs 84, 85 by electromagnets M 2 , M 1 . As shaft 31 rotates, it rotates a timing-cam 95 controlling microswitches S 2 , S 3 . Members 65, 66 are raised and lowered by arm-members operated when a shaft 118, Fig. 13, is rotated from a constantly-rotating gear 117 loose on the shaft. Gear 117 is recessed at 119 to accommodate a disc 120 keyed to the shaft and having its periphery undercut at three places, Fig. 11, to form with the faces of the gear 117 and a plate 131 also loose on the shaft, three spaces of triangular section 123. Each space contains roller 126 urged by a spring 128 towards a pin 130 carried by plate 131 which is prevented from rotating by a catch 132 kept on engagement by a spring, but which is released when an electromagnet M 3 , Fig. 14, is energized. When this takes place, the rollers 126 are pushed into the corners of the spaces and the rotation of gear 117 is transmitted to shaft 118. Control circuit, Fig. 14. Relays R 1 , R 2  control contacts C 1 , C 2  those crossed by a diagonal being normally closed, and the others normally open. When all the bobbins are on their carriers a switch S 1  is closed by a cam, and M 1  is energized to clutch-in bevel gear 73 and rotate shaft 31 in the direction of the arrow G, Fig. 9, to move the carriers on to the lifting- arms 65, 66 beneath the magazine. Meanwhile, switch-cam 95 is being rotated, and when all the carriers are in position, S 3  is closed without effect since C 2  is open, and S 2  is closed so that R 1  is energized to operate contacts C 1 . Accordingly M 1  is de-energized to discontinue the rotation of shaft 31, and M 3  is energized to free latch 132 and allow shaft 118 to rotate to operate the lifting-members 65, 66. After one revolution of shaft 118, the lifting-operation is completed and the lifting-members restored to starting position, and a micro-switch S 4  is operated by a cam to energize relay R 2  to operate contacts C 2 . Accordingly, R 2  is lockedin, M 3  is de-energized to restore detent 132 and stop rotation of shaft 118, and S 3  being closed, M 2  is energized to reverse the direction of rotation of shaft 31 to restore the carriers to bobbin-receiving position; at this point, S 3  is opened to de-energize M 2  and stop rotation of shaft 31. Switch S 1  is now opened. Specification 699,902 is referred to.