Patent GB-716804-A (GB)
Title: Improvements in or relating to nail separating and delivering mechanisms suitable for use in machines for attaching heels to shoes
IPC: A43D71/00
Filed: 1951-12-08
Abstract: 716,804. Nailing. BRITISH UNITED SHOE MACHINERY CO., Ltd., and QUARMBY, R. C. Dec. 8, 1952 [Dec. 8. 1951]. No. 28808/51. Class 89(3) In a heel-attaching machine comprising a raceway to which nails are fed from a hopper, a nail separator associated with the raceway for separating the endmost nail, and a nail-inverting disc below which are a nail-distributing block and a nailinserting device, means are provided to push the nails from nail-receiving pockets in the inverting disc into holes in the distributing block. The nail separator 93 controlled by a cam on a shaft 123 has forward and rearward arms carrying respectively a separator blade 99 and a stop plate 101. The blade 99 pushes successive nails into pockets 155, Fig. 5, in the nail-inverting disc 157 in which they are retained by a guard 165 which covers part of the face and edge of the disc and has a central projection 183 to close the inner ends of the pockets. The nails are pushed out'of the pockets by a lug 179. Fig. 4, provided on a vertical slide 175 and extending into a recess 181 at the centre of the disc. The slide is operated by a cam 191 on shaf 123. The disc 157 is secured to a shaft 161 provided with a Geneva wheel 195, Fig. 3, which is operated from the shaft 123 through a disc 201, the Geneva wheel being accurately positioned by a segmental hub portion of the disc 201 engaging recesses in the wheel. The distributing block 223, Fig. 4, to which the nails pass from the inverting disc 157 is coupled thereto by bevel gears 159, 227 so that the block which is provided with 20 nail-holes 221 is moved through 1-1/20 revolutions while the disc which has 6 nail pockets is moved through a revolution. A perforated nail stop-plate 229 arranged below the block 223 is moved against a torsion spring 233 when the block is loaded to open the holes by a pawl 235 controlled by a counting mechanism and co-operating with ratchet teeth on the stop-plate, thereby allowing the nails to pass by tubes 461 into an upper block 463, Fig. 13, of a nail transferer mechanism. The nails are retained in the block 463 by an upper spring-retracted pivoted stop plate 467 held in position by a spring-pressed latch 481 engaging a stud 479. The latch is released by a screw 485, not shown, on a transfer slide 477 when a lower block 475 carried by the slide is positioned under the upper block 463. At the same time a lower spring-retracted pivoted stopplate 487 which retains nails in the lower block is moved under the block by a cam surface 501 engaging a fixed stud 503 and is retained by a spring-pressed latch 505 on the slide 477 engaging the head 507 of a pin 497 on the plate 487. As the slide 477 moves forwardly, a nut on the rear end of a rod 509 engages a stop and disengages the latch 505 so that a spring 495 swings the plate 487 away from the block 475 and the nails fall into the work support. At the same time, the upper plate 467 is returned under the block 463 by a pin 511 associated with the slide engaging a projection 515 on the upper plate. To ensure that the nails are discharged from the lower block 475 before it returns to below the upper block 463, a spring-pressed rod 517 is provided on the latch 505 to co-operate with a pawl 521. The nail counting mechanism comprises a ratchet wheel 245, Fig. 3, which is driven from the shaft 161 through bevel gears 239, 240 and through a pawl 287 moves a spring- box 251 counterclockwise until an arm 283 thereon engages a lug 293 on a stopplate pawl-controlling member 263 to cause the pawl 235 to engage a ratchet tooth on the plate 229. At the same time, a clutch controlling arm 272 has opened a clutch 319 on shaft 123 and applied a brake 329. When the pawl 287 is disengaged by a releasing device 297, the spring-box 251 moves clockwise until the arm 283 engages a stop lug 281 on a member 257 which is adjustable relatively to the member 263 to determine the number of nails to be fed. The stop lug 281 serves also to re-engage the pawl 287. The nail hopper 3, 7, Fig. 2, mounted on a pivoted bracket 5, is provided with a hinged door 9 having a lid 11. The rotary part 7 having internal shelves or scoops is provided with a V-shaped rib 23 which is supported in a driven roll 25 and idler rolls 27. The raceway 1 provided with a cover 77 is secured to the hopper bracket 5 by a hand screw 35 and has a cam-operated nail-clearer lever 37. The hopper bracket 5 is secured to a plate 131, Fig. 20, which is pivoted on a vertical stud 133 and is locked in operative position by a lug 145 on a bolt 143 engaging behind the head 139 of a stop screw 137. The pulley 327 which drives the shaft 123 is driven by a countershaft 335 (not shown), which through a second countershaft 349 (not shown), drives the hopper. The transfer slide 477 is driven by a third countershaft 359, Fig. 16, through a vertical shaft 367 which carries a clutch member 377 movable to engage oppositely driven bevel gears 369, 375. The clutch member 377 is operated by clutch arms 379 secured on a two-part vertical rod 381, 384 and is engaged with the upper bevel gear 369 when a pawl 411 engaging under a shoulder 409. is raised by clockwise movement of the lever 413 on which it is mounted. This occurs when the usual treadle is released after a heel attaching operation. The shaft 367 is driven through about 340 degrees in a counterclockwise direction to move the nail transferrer over the shoe support. A high part 447 (not shown), of a cam 449 having moved from beneath the rod 384, a projection 453 on the edge face of the cam disengages the pawl 411 from the shoulder 409 and allows the rod 381, 384 to drop so that the clutch member 377 engages the lower bevel gear 375 and the shaft 367 is rotated in clockwise direction to return the nail transferrer. The high part of the cam 449 subsequently raises the clutch member 377 towards neutral position. The clutch member 377 is given a relatively small aditional movement to ensure that it is clear of the lower bevel gear 375 by a mechanism including a pivoted latch 393 co-operating with a hook 395 and controlled by a lug 407 on the rod 384 through a rod 401, and including also pin-and-slot and spring connection of the rod parts 381, 384. At the same time that the transferrer mechanism operates, the pawl releasing device 297 is actuated by a link 445 connected to the pivot of the lever 413 to release the spring-box 251 to close the clutch of the counting mechanism and start another counting operation, Specifications 23356/04, [Class 89], 348,071 and 716,798, [Group XXIV], are referred to.