Patent GB-206437-A (GB)
Title: Improvements in or relating to machines for marginally flanging the end of a shoe upper off its last
IPC: A43D75/00
Filed: 1922-05-01
Abstract: 206,437. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). May 1,1922. Uppers, machines for. - A machine having mechanism for marginally flanging the ends of a shoe upper off its last by a moulding operation includes fastening-inserting mechanism mounted for movement into and out of operative position. The machine illustrated includes duplicate mechanisms for shaping and securing to the insole the heel end of shoe uppers of the welt shoe type. The machine frame includes side frame members 1, Fig. 3, cross ties 2, a top or table portion 3 and a main driving shaft 4 from which a shaft 7 is driven through gearing 5, 6. A worm 9 on the shaft 7 engages a worm wheel 10 having an enlarged hub 11 loosely mounted on a shaft 12 on which are also mounted, on each side of the hub 11, loose sleeves 13 each of which carries cams for operating one of the twin uppershaping mechanisms. Either sleeve may be clutched to the hub 11 by mechanism including a clutch pin 14 carried on a ring 18 which is under the influence of a spring 19 tending to rotate the ring in a direction to engage the clutch pin with a hardened ring on the hub 11. Each ring 18 has a shoulder 20, Fig. 5, adapted to be engaged by a clutch-disengaging member 21 mounted to rock upon a support 22 and having a portion 23 normally pressed by a spring 24 so as to engage the member 21 with the shoulder 20. After the member 21 has been tripped, it is automatically returned into engagement with the shoulder 20 through a trip block 26 which is engaged by a backwardly-extending inclined end portion 30 of the treadle 28 when the latter is depressed. The block 26 tilts to permit return of the treadle. The machine includes means for locking the starting treadle 28 of one twin mechanism when the other is depressed. A bunter 34, Fig. 7, on the treadle engages a spring- pressed push rod 32 which in turn engages one arm of a bell-crank lever 37, and the rear arms of the two levers 37 are connected by locking rods 38, 39 which have at their ends locking blocks 40, 43 connected by a spring. When one treadle is depressed, its associated locking-rod is moved, thereby moving the other rod and block through the spring, until a locking-finger 49, formed as one arm of a bell-crank lever normally resting idly against its block 43, snaps behind the latter block, thereby locking the other treadle. The finger 49 is disengaged at the end of the cycle by the engagement of a roll on the other arm of the bell-crank lever with a cam on the sleeve 13. Each upper-shaping mechanism includes a form 54, a heel band and wipers 125 the operating mechanism of which is not described. A single fastening-inserting mechanism of the gang type is arranged for movement from an idle position to position over either of the shaping mechanisms, where fastenings are inserted through apertures in the wipers while the latter are holding the shaped upper. The fastening mechanism includes a frame 244 movable along a guide 243 by a rack 245, Fig. 18, engaged by a mutilated gear 246 on a shaft 247. The lower end of the shaft carries a toothed wheel 248 in mesh with a toothed wheel 249 on a shaft 250, the lower end of which is provided with a bevelled gear 252 which is in continuous engagement with opposed bevelled gear 252 which is in continuous engagement with opposed bevelled gears 253, 254 loosely mounted on a rotary shaft 255. The gears 253, 254 may be selectively clutched to the shaft 255 by clutch teeth 257, 258 co-operating with teeth 259, 260 on a member 261 adapted to be moved along the shaft 255 by the engagement in a groove 265 of rolls 266 on a lever 267 the lower end of which is connected to two rods 270, 271. The latter are connected to rods 272, 273 which are engaged by throw-in cams 276 and throw-out cams 277 on the sleeves 13 in order to clutch either of the gears 253, 254 to the shaft 255 and so move the fastening-mechanism to either of its operating positions. The lever 267 may be locked by a spring-pin 280. Blank portions on the rack 245 and gear 246 prevent overthrow when the fastening-mechanism returns to idle position, where it is accurately positioned by a spring-plunger engaging a flange on the gear. The support 243 for the fastening mechanism is mounted for vertical movement on side rods 291 and supported by springs 296. Each side rod has a series of rack teeth 297, Fig. 5, engaged by a toothed segment 298 on an arm 299 which carries a roll 300 travelling in a cam path in a cam 302 mounted on a shaft 303 on which also are mounted duplicate ratchets 350, Fig. 19, co-operating with the cam sleeves 13 to rotate the shaft 303 at suitable times. Loosely mounted on the shaft adjacent each ratchet is a pawl carrier 352 having a series of spring-pressed pawls in engagement with the ratchet. The hub portion of the pawl carrier has secured to it a gear 356, which is rotated by a mutilated gear 357 on the associated cam sleeve 13. The gear 357 carries a pin 358 adapted to strike a finger secured to the shaft 303 so as to give a slight initial rotation to the latter to cause the pawls properly to engage the ratchet. When the fastening mechanism is lowered, a positioning pin on the frame 244 enters a recess' in the table 3 and further to ensure proper location of the frame 244 at such times the rack 245 may have blank portions 306 to engage the blank parts of the gear 246. The side rods 291 carry a shaft 307, Fig. 16, on which is splined a gear 309 in engagement with a gear 310 on a shaft 311. Mounted on the latter shaft is a cam 313 on which rests a roll 314 on a slide depending from a tacker arm 318, which carries a driving plate 322 on which are mounted driver-bars 326 and drivers 327. The driver receives its impulse from springs against which it is lifted by the cam 313. Tacks are fed to the nozzles 328 through conduits 333 from a separator 334 and hopper 335. The latter is oscillated by a rack 337 under the influence of a cam 338 on the shaft 311 and of springs 340, 341. The tack driving shaft 307 is driven from the shaft 303 by chains mounted to swing with a toggle-like action when the fastening mechanism is raised or lowered. In operation, a heel seat reinforcing- piece, insole, upper mpaterials and counter are assembled on one of the forms 54 and the appropriate treadle is depressed when the moulding mechanism shapes the shoe-end. With the wipers in advanced position the automatic clutch mechanism is rendered operative to move the fastening mechanism into position over the shoeend and to insert fastenings. Specifications 11222/08, 23685/12, 110,923, and 191,477 are referred to.