Patent GB-768259-A (GB)
Title: Improvements in or relating to machines suitable for use in the manufacture of shoes
IPC: A43D25/12
Filed: 1954-06-16
Abstract: 768,259. Securing heel breast flaps. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). June 15, 1955 [June 16, 1954], No. 17632/54. Class 17 (1). A machine for laying a flap 26 against the breast face 32 of a heel 30 during manufacture comprises a shoe support 72, and a pair of tools 46, 48 one 46 operating in advance of the other 48, the tools being so moved as to operate on different portions of the flap. The shoe is clamped to jack 40 by clamp 42 operated by driving mechanism 50, and carrier 44, driven by mechanism 52, carries resilient roller 46 and rigid boning tool 48 through the closed paths 256, 282 (Fig. 2) respectively. Work support 72 is adjustable heightwise, by screw post 74, on a block 68 adjustable on slide 64, and carries an adjustable back gauge 88. Sprocket 98 on shaft 100, driven from an electric motor via sprocket 96, drives shaft 122 of mechanism 50 through 118, 120. Clutch member 124 slidable lengthwise on and rotatable with shaft 122 is spring urged to engage and drive collar 130, but when the machine is at rest the collar is held against rotation by a latch 142 engaging stud 132, or 132a, on the collar (as in Fig. 2). When slide 64 is moved rearwardly, on presentation of the shoe, it slides trip bar 162 rearwardly, with lost motion, to disengage latch 142 from stud 132, so that collar 130 rotates. Cam 136, secured to collar 130, then allows lever 146 to be moved about its pivot 144 by spring 150, and through 154, 196, 198, 202, 204, 206 moves clamp 42 from its raised position to clamp the shoe and limit movement of the jack. The path of movement of clamp 42 is adjusted by adjustment of arm 220 about rod 106, which through bell crank 212 adjusts the position of carrier 206. Latch 142 is spring returned, and is engaged by stud 132a after the collar has rotated approximately 210‹, so that rotation of collar 130 again ceases. Roller 46 is supported on rotors 234 carried by a yoke 238 pivoted at 239 to arms 240 fulcrumed at 242 and at 246 to crank 248 pinned on shaft 100, so that it moves in closed path 256 and is forced with a combined rolling and wiping action against the flap to force the latter progressively against the shank and heel breast. Boning tool 48, preferably of steel with an acute-angled edge 260, wipes the flap progressively towards the top piece and tucks the flap into the angle 258 between the breast face and top piece, finally rolling over the top lift projection. The tool is rotatable on rod 262 connected to, and normally aligned with, springs 264 attached to couplings journalled on pins 268 on links 270 pivotted at 272 to arms 240, screws 276 secured to links 270 being slidable in guideways 278 in yoke 238. Thus tool 48 moves in the closed path 282 in advance of and without interfering with roller 46. When pin 302, which is normally raised by spring 318, is depressed by depression of handle 306 which acts through 308, 324, 320, spring 296 slides plunger 294, with cam 298, to the left (Fig. 6) in block 290 pinned to shaft 100, so that the plunger is engaged by a pin 286 attached to the rotating sprocket 96, and shaft 100 and crank 248 are rotated. When pin 302 is raised it is engaged by cam 298 which moves plunger 294 to the position shown in Fig. 6, disengaging the clutch. Shaft 100 is brought to rest when a shoulder on cam 298 engages pin 302. When the flap has been laid the friction clutch is operated to return the cam to the starting position by depression of knob 336 which moves trip rod 326 rearwardly against spring 328 to disengage latch 142 from stud 132a so that collar 130 is rotated, releasing clamp 42, until the latch engages stud 132. If lever 308 is released quickly after depression, shaft 100 rotates once and tools 46, 48 operate once, and a second operation of the lever gives a second operation of the tools, but if lever 308 is held down the tools continue to operate. Roller 46 may be of solid rubber, or comprise a spring embedded in a sleeve of rubber &c. Specification 343,151 is referred to.