Patent GB-354193-A (GB)
Title: An improved machine for securing the lids to boxes
IPC: B21D51/52
Filed: 1930-05-01
Abstract: 354,193. Securing hinged box lids. EXCEL CO., Ltd., 52, St. John Street, West Smithfield, and BOWKETT, E., 44, Harders Road, Peckham, both in London. May 1, 1930, No. 13444. [Classes 83 (ii) and 83 (iv).] Angular bending; straightening; shearing; shear-blades; stamping.-In a machine for automatically securing hinge wires to the backs of boxes and bending the hinge lugs of the lids over them, the boxes b are supplied one at a time from a shoot 6 and transported successively by spring grippers 8 on a reciprocating carrier 12 to blocks 1 .. 5 where the several operations of stamping the hinge snugs, securing the hinge wire, presenting and securing the lids &c. are performed, the completed boxes being finally pushed on to a delivery table. The pairs of jaws 8 carried by spring- pressed levers 9 are mounted on a plate 12 reciprocated longitudinally of the machine by a lever 46 and cam 49 on the main shaft 51, plate 12 being guided in a plate 13 which is reciprocated transversely by a link 52 and cam 53 to move the jaws to and from the blocks 1 .. 5; the jaw levers are opened and closed at the right times to grip and release the boxes by arms 16, Fig. 6, on a shaft 15 rocked by a lever 54 pivoted at 55 and actuated by a cam 56. The boxes b are released one at a time from shoot 6 by fingers 7 on a rod 59 actuated by a cam 58, the released box being carried by the jaws 8 to block 1 where the groove and snugs for the wire hinge are stamped by die 17, Fig. 8. The block 1 is formed as a companion die and the box is slightly lifted therefrom after stamping by spring pins 18, the stamping at the same time slitting the metal and forming raised snugs r at the ends of the groove g, Fig. 13. Die 17 is operated by pivoted lever 61 and cam 63. The box is now transferred to block 2, Fig. 10, where the wire w is fed by feed rolls 23 through a guide l, Fig. 13, in a fixed member 21 past a movable cutter 22 and through a guide h in a movable member 20 to engage a shoulder c in a movable member 19 in the block 2, after which the cutter descends and severs a hinge length depressing it into groove g whereupon member 19 is moved to the right by lever 76 and cam 78 to engage the wire ends correctly in snugs r. Members 20, 22 are then raised by levers 67, 68 and cams 71, 72. The feed rolls 23 are driven by a ratchet 79 on the lower roll engaged by a pawl 80 on arm 81 rocked by a pinion 83 actuated by rack 82, lever 84 and cam 86 ; the upper roll 23 is mounted in a spring-pressed lever 87 pivoted at 88 and may be held out of engagement with the lower roll by a finger 90 having a nose 92 engaging a fixed pin 93. The wire is staightened by passing through a kinked guide 24, Fig. 12, carried by a rotatable head 25 faced with friction material 26 adapted to engage a continuously driven member 28. Whilst the wire is being fed the tension pulls head 25 into engagement with member 28 causing guide 24 to be rapidly rotated. No operation is performed at block 3, the space above which is required for the wire straightening device. At block 4 a box lid d, Fig. 15, with hinge lug u uppermost is released from a shoot 29 and swung over by magnetized fingers 31 into position shown in Fig. 17 and lug u is hooked over pin w by the action of fingers 35 which lift the lid into the position shown in Fig. 18 whilst presser 33 engages lug u, fingers 31 being at the same time retracted. Presser 33 is actuated by cam 98 and linkage 99, 101, 102. Fingers 31 are operated by cam 94 and rod 96 and fingers 35 by cam 103, lever 105 and segments 106, 107. A bar 125 on lever 123 holds lid d in correct position for feeding until lever 123 is moved aside by pin 126. The next lid in shoot 29 is prevented from falling by the fingers 31 which cannot move back completely to allow the lid to fall until the next box is on block 4, the latter box then pushing back a member 131 on a rod 132 which moves out of the way a spring 130 normally limiting the full return movement of fingers 31. The box is now transferred to block 5 and the hinge lug bent over by an arm 37 of a lever 109 operated by a cam 108 Fig. 19, the latter figure also showing cam operated means 115 .. 118 for rocking a shaft 44 carrying fingers 43 for holding the box on the block. The completed box is taken from block 5 by the last pair of carrier jaws 8, the lid swung down by a pusher 40 and the box allowed to fall down shoot 14 to a movable platform 39 which is then raised by a cam 110 level with a delivery table on to which the box is pushed by a member 42 operated by rod 122, lever 120 and cam 119.