Patent GB-992244-A (GB)
Title: Improvements in or relating to attaching heels to shoes and machines for use therein
Inventor: BASSFORD JOHN MURRAY
IPC: A43D79/00
Filed: 1960-11-18
Abstract: 992,244. Stapling-machines. BRITISH UNITED SHOE MACHINERY CO. Ltd. Nov. 16, 1961 [Nov. 18, 1960; Sept. 22, 1961], Nos. 39634/60 and 33945/61. Heading B4C. A machine for attaching a polythene &c. heel H to a shoe L by means of staples 5 comprises a shoe support 18 having staple guides 180, Fig. 15, and means 138, 152 for driving the staples from the guides through the heel-seat L of the shoe into the heel, the guides being inclined so that the staples are driven towards a central region of the heel. The machine is similar to the nailing machine of Specification 716,804, being adapted for driving staples by modified means 30 for feeding the staples and a support 18 arranged to receive staples rather than nails. A cylindrical driver 138, Fig. 17, for the back of the heel and at least one driver 152 for each side of the heel have flanges 146 which travel in the staple guides 180. Operation of the drivers, against the influence of a return spring 170, Fig. 13, is by a plunger 160 and push-rods 140, 156, rod 140 being adjustable by a screw 166 in the plunger-flange 162. A heel-positioning plate 124 with a rearward extension 126 is held in place by a plate 123 and adjusted by a screw 128. Staples are fed along the spiral ramp 22, Fig. 2, of a vibratory hopper 20, and straddle a wire 24 or fall back into the hopper. From the wire, the staples are tipped head first into a shoot 26, 28 leading to the top of a disc 34, Fig. 3, having three peripheral slots 36 for receiving staples. Above the disc are two cams 42, 44 rotating with the disc. The cam 42 operates a spring-pressed pivoted hammer 46 which taps the end of the shoot 28, and the cam 44 operates a pivoted, spring-pressed lever 50 having a dog 56 which moves into and out of the path of the staples. Below the disc 34 is pivoted plate 58 biased by a spring into position beneath the disc and withdrawable by a solenoid 88, allowing the staples to fall into delivery tubes 59. The disc 34 is driven from the machine through bevel gears 66 and 68, Figs. 1 and 3a, and spur gears 72, 74. A crank 78 on the shaft of gear 74 is connected by a rod 80 to a one-way clutch 82 on the shaft of disc 34. One stroke of the crank 78 rotates the disc through a third of a revolution, the disc being prevented from reverse rotation by the hammer 46. A dog 84 on the bevel-gear 66 operates a micro-switch 86, causing the solenoid 88 to withdraw the plate 58 when a staple is in two of the three disc-grooves 36 and the third groove is beneath the shoot 28. A staple then falls into each of the tubes 59 which lead to a distributer 100, Fig. 6, from which the staples fall into a carrier 182 where they assume the inclination required in the shoe support 18. As described in Specification 716,804, a slide 276 supporting the carrier 182 moves it from beneath the distributer 100 to a position over the shoe support 18, where a plate 96 beneath the carrier is pivoted to one side, releasing the staples which fall into the guides 180 or are blown into the guides by compressed air entering the carrier through bores 98. In a modification, the staples are fed from a hopper 194, Fig. 18, having a semi-cylindrical base 198 and a shaft 204 driven by Geneva wheel 206 rotated in steps by the rolls 209 on a driver 208 which has quadrants 211 co-operating with the arcuate portions 213 of the wheel 206. Mounted on the shaft are sleeves 234, Fig. 19, keyed together at 233 and also to a collar 234 driven by a collar 222 which is keyed to the shaft 204. Angular adjustment between the collars 222, 224, is by screws 230, Fig. 18, in the collar 222 and engaging a pin 226 on the collar 224. The sleeves each carry a four-bladed pick-up plate 240, the blades of which pause adjacent holes 244 in the hopper through which the staples pass on to bars 246 down which they slide until arrested by arcuate selectors 258 pivoted on a crossmember 256 and interconnected by a bar 262. Anti-clockwise rotation (Fig. 19) of the selectors by downward movement of an operating rod 266 releases a staple on each bar 246 for movement towards delivery tubes 190 into which they are tipped head-first by steps 280. The rod 266 is connected to a lever 268, Fig. 21, on a pivot 269 on which hangs an arm 272 having a flat side co-operating with a flat side of the lever. The arm 272 hangs in the path of a cam 274 on the carrier slide 276 for transporting the carrier 182 to the shoe support 18 and swings idly when the slide moves towards the support 18. On return movements of the slide, the cam 274 turns the arm and lever clockwise and operates the rod 266, which is returned by a spring (not shown. The distributer 192 comprises three sleeves 290 within which are split orientating elements 296 providing a lead into a gap 298 aligned with the corresponding staple-slot in the carrier. In a further modification, (not shown), a hopper of the vibratory type may have three staple-ramps side-by-side, leading staples on to raceways taking the form of or the place of the bars 246, Fig. 18. If the staples leave the hopper with their legs trailing, the selector device 258 of Fig. 18 may be used to feed the tubes 190. The first Provisional Specification discloses also a machine in which the rear pushrod for the staple driver is not adjustable in the plunger-flange, and the drivers are of rectangular cross-section.