Patent GB-470749-A (GB)
Title: Improvements in or relating to shoe upper conforming machines
IPC: A43D21/12
Filed: 1935-11-20
Abstract: 470,749. Boot - making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., and ROBERTS, W. T. B. Nov. 20, 1935, Nos. 32104/35 and 13491/36. [Classes 17 (i) and 89 (iii)] Lasting.-A machine for lasting the toe portions 29 of shoes by power has a plurality of fastener inserting devices which act automatically to secure the wiped over upper margin in position, these devices being in withdrawn position, heightwise of the shoe, when upper margin engaging means of the machine engage the toe portion of the upper from the inside while wipers engage it from the outside. The jack is, to receive the work, tipped forwardly about a shaft 3, Fig. 1, on which is mounted a sleeve 5 in which slides a jack post 7. As the jack is swung rearwardly and raised by a treadle 11, an arcuate tongue 15 thereon enters a corresponding groove in members fixed to the machine frame, to retain the jack against forward or rearward movement while allowing it to be swung about the axis of the post 7. A large rubber toe-pad 19, Fig. 17, is bonded to a metal block 20 located by dowel pins on a block 25 formed with curved guideways extending widthwise of the shoe. Rubber pads of different thicknesses are used for different shoe sizes, so that the toe end of the insole is at a uniform height for all sizes. The block 25 is secured to a rocking frame 27 engaging an arcuate rib 31 at the top of the post 7, this construction allowing rock of the work-piece both laterally and longitudinally of the shoe, about axes in the tread face of the insole at the toe end. The rocking frame has a pair of parallel bars 33 bridged by a yoke 35, Fig. 18, carrying a pivot pin 37 about which heel-end supporting devices may rock. The pin carries a block having a leather facing 40 and guide rods 41, one above the other, slidably carrying the lugs 43 of fingers 45 each arranged to bear against one side of the shoe. A right-and-left screwthreaded stem 47 engages these lugs to vary the distance the heel end of the shoe may sink into the pocket formed by the members 40, 45. The arms 33 are formed with rack teeth gearing with a pinion rotated by a disc 51 for adjusting the heel end support for length of shoe, the edge of the disc bearing a scale co-operating with a latch 55 for both holding the disc in adjusted position and indicating the position in which it is set. A similar scale indicates the distance apart of the fingers 45. To facilitate the shaping of a rubber toe-pad 19, a gauge member 34, Fig. 26, is provided having a stop pin 40, engaging a hole in the rocking frame 27 and the front of the jack post 7 to maintain the frame in operative position. The member 34 is positioned angularly by a pin 42 and has surfaces 36, 38, at right-angles, for engaging the tread surface of the insole and the toe end of the shoe. The rubber pad is hollowed out until the shoe can be positioned snugly. The scale readings are then noted, and repeated for similar work. The toe end gauge 61, Fig. 1, is coupled to a bell-crank lever 63, the free arm of which engages a fixed abutment 65 as the jack is swung rearwardly, and thus withdraws the gauge to out-of-the-way position. The shoe hold-down 13, Fig. 17, is carried by a cross-head 67, Fig. 4, secured to a pair of vertical slides 69 engaging vertical rods 71. An insole engaging foot 73, Fig. 18, is positioned about 1" from the toe end of the shoe, and ribs 75 about 1¢" long engage opposite sides of the ball portion. These ribs are carried by a plate 77, Fig. 22, pivoted on a rib 78 and adjustable heightwise and about the rib by a thumb-screw 81 and a handle 79, respectively. Wipers 9, Fig. 7, are mounted on carriers 83 each supported on one of a pair of castings 85, Fig. 4, slidable vertically on the rods 71 and other parallel rods 87, and linked to a lever 91 adjustably linked to a cam-actuated lever 97. The wipers are secured in their carriers by spring pressed studs 109, the carriers being guided by arcuate faces 111 and being swung by rods 113 actuated by a lever 115 connected by a rod 117 with a cam-actuated lever 119, the end of the rod 117 being adjustable along a slot in the lever 119 to vary the extent of movement imparted to the wipers. The arcuate faces 111 engage blocks 121 freely pivoted on studs 123 adjustable by eccentric portions thereon and mounted on brackets slidable lengthwise of the shoe, this movement being produced by rods 129, lever 131 and link 133, the latter being adjustably connected to a cam-actuated lever 135. The slides 69 are coupled by links 137 to a lever 139 coupled by an adjustable rod 141 to a cam-actuated lever 143. Upper spreading and retarding fingers 149, Fig. 7, about 1¢ "long, are mounted on pivot pins 151 which depend from the end of a bar 153 linked to a cam-actuated lever 157. The forward end of the bar is connected by a pair of vertical links 169 to the forward end of a cam-actuated lever 175. A spring 181 bears against an arm 173 secured to a link 171 between the links and lever, and is adjustable along the arm, so that downward swing of the lever produces a yielding downward movement of the fingers. A stop 184 on the lever supports the links. The fingers are swung by links 187 connected to a rack 191 gearing with a pinion 193 actuated by a segment 195 on a cam-actuated lever 197. A second cam-actuated lever 205 is adjustably connected to the segment and functions to separate the fingers slightly prior to upwiping, to urge the margin of the upper outward slightly beyond the edge of the insole. To hold the toe end of the insole firmly down, the cross-head 67 has pivoted to it at 214, Fig. 7, an arm 215 carrying an insole-engaging plate 217 and actuated by an arm 219 on a rod 223 rocked by a cam. To clamp the toe end of the upper against the last when the wipers have reached their fully advanced position, a band 227, Fig. 5, of thin strip steel is carried by pins 229 extending from blocks adjustable on sleeves 235 surrounding stems carried by the castings 85. Springs 237 urge the sleeves forwardly into contact with nuts 239 on rods 233 coupled to rods 241, Fig. 4, actuated by the lever 175 through a lost motion device. The tacking mechanism is carried by a tubular slide 247, Fig. 9, connected by links 249 with a cam-actuated lever 251. Secured to the lower end of the slide is a member 255 of D-shape carrying a gang of depending tacking arms 257, Fig. 21. Each tack driver 266 is secured to a carrier 265 operated by the D-shaped head 268 of a bar 267, Fig. 9. The bar 267 is urged downwardly by springs, as usual, and is coupled to a cross-head 270 connected by links 271 with a cam lever 273. A latch 275 is carried by the cross-head, is slidable forwardly and rearwardly on rolls 276 and urged forwardly by a spring so that its bevelled edge engages beneath a roll on the bar 267. A latch finger 280 normally maintains the latch in its forward position. As the slide 247 descends to lower the tackers to the shoe, a pivoted latch-tripping member 281 releases the latch and the tacks are driven. The tacking arms are aligned by slots in plates 283, Fig. 11, advanced and closed similarly to the wipers, the outer edges of the slots being geometrically similar to the inner edges of the wipers. The plates 283 are detachably secured to a table 289, Fig. 9, carried by links 291 pivoted to the slide 247 and links 249. A carrier plate 290, Fig. 11, for each plate 283 has cam slots 292 engaging rolls 294 mounted on the table 289. Links 293, Fig. 9, are pivoted to levers 295 depending from a rod 317 and arranged to be connected at their lower ends to the lever 115 which actuates the wipers, so that the wipers and the plates 283 move proportionately. The table 289 is coupled by links 297 to a lever 296 similarly actuated by the lever 131 which actuates the blocks 121. To cause the tacking arms to descend on to the wipers and track across their edges to carry the margin of the upper inwards before descending to press the upper snugly against the insole, the links 293, 297 are each formed as toggies, sleeves 299 providing connecting pivots and each sliding on a stem 301 carried by a bar 303 pivoted at 307 and actuated by a cam roll 309. To prevent the forward edges of the plate 283 from fouling the foot 73, the connections between the levers 115 and 295 comprise a roll on the first and a notch 313 on the second of each pair, providing a lag of the plate 283 when the lever 295 is raised, as allowed by a slot 315 forming the connection between the lever and its pivot. The lever is supported by links 321, 323 connected by a pivot 320 guided by a link 325, the link 323 being pivoted to the bar 303. In case it is desired to open and close the wipers prior to starting the machine, the link 117, Fig. 4, is provided with a hand-wheel 329 and is threaded into a trunnion at the lower end of the lever 115. A notched disc 118 co-operates with a blade spring to hold the link in adjusted position. The lever actuates a finger 332, Fig. 1, moving over a fixed scale 330 to indicate the adjust-. ment of the link. To give extra clearance when it is desired to change the wipers, the cross-head 67 is carried by arms 338, Fig. 27, pivoted at 331 and retained in operative position by spring poppets 333. The cross-head may, therefore, be swung forwardly and downwardly to give complete access to the wipers. As it is swung a pin 346 in an extension of a bell-crank lever 340 forming the connection between a link 225 actuating the shaft 223 and the cam-actuated rod 344, lifts the rod so that the pin enters a horizontal slot in the rod, and accidental starting of the machine will not damage these parts. To modify the pressure of the wipers on the shoe during the up-wiping, a portion 339, Fig. 19, of the cam is formed on the outer edge of a curved plate 341 pivoted at 343 at one end and adjustable at the other by a screw 349. Four springs 353 urge the curved plate outwardly, thus providing a yield during the upwipe. The p