Patent GB-206251-A (GB)
Title: Improvements in or relating to boot or shoe heel breasting machines
IPC: A43D87/00
Filed: 1922-08-05
Abstract: 206,251. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). Aug. 5, 1922. Breasting. - A heel-breasting machine having a form breasting cutter operating by rotation or rotary reciprocation and producing on the heel a ridged breasted face includes means determining movement between a work-positioning device and the form cutter such that the latter cuts at the base of the heel breast a surface arched, in a form differing from the form of the cutter, across the longitudinal axis of the heel so as to blend with the waist of the shoe. In one construction, Figs. 2, 4 and 6, a column 2 has at its upper end bearings for shafts 20, 22 carrying respectively a breasting cutter 24 and scalloping cutter 26, both driven by belting from a pulley 10 on a power shaft 4, Fig 4. Mechanism for positioning the work includes a plate 40 for engaging the tread face of the heel formed on a head 42 secured by a stem 44 on a post 100, and gauges 45, 46 for engaging the forepart of the shoe; these gauges are vertically adjustable in an upright 48 in the head 42. The rear end of the top-lift of the heel is engaged by a slide 60, Fig. 6, adjustable in the plate 40, and the rear end of the heel by an abutment 64 pivoted to the slide 60 and adjustable by a screw 67. The heel is further engaged at the sides by pairs of feet 69, 71 carriecd by arms 75, 76 and adapted to be closed by wedge blocks 78, 86 on levers 84, 87 operated simultaneously by pressure of the hand on the lever 84. The head 42 is vertically ad. justable in a split clamp on a post 100, which is pivoted to a block 185 pivoted by a stem 106 to a lever 104. When the post 100 rises to carry the work to the' cutters a roll 189 on the post 100 engages a vertically-adjustable templet 186, which has two convexities 193, 195, adapted, respectively, to cause in and out movement of the work with respect to the cutters 24 and 26 to produce a convex breasting cut. During this movement the fare of the shoe shank is in contact with a guard 194, which is hinged to the frame and contoured to cause a to and fro movement of the shoe longitudinally of the cutter shaft, so that the cutter trims the base portion of the heel to the transverse curvature of the shank. When the roll 189 is beyond the top of the templet movement of the work ceases, to allow the scalloping cut to be made. The lever 104, Fig. 4, is pivoted at 110 to the machine frame and connected by a link 112 to a crank 114 fixed to a shaft 116, on which is loosely mounted a continuously-rotating worm wheel 118. Between the wheel 118 and shaft 116 is a clutch of the Horton type, including a disc having a single knock-off projection 128 engaged alternately by stops 130, 132 operated through arms 134, 136, 140 by a link 141 pivoted to the arm 140 and post 100. When the post 100 is moved inwardly the stop 130 is released to allow a half revolution of the shaft 116 to raise the work. To transmit more power to the cutter shafts whilst the work is raised, a belt-tightening roll is mounted, through friction washers, on the shaft 116 so that rotation of the latter presses the roll against the cutter belting. A guard 160 for the operators' hand is mounted for rotation about the shaft 22. and is connected by a flexible connection 164 and spring 168 to the link 112. In normal position, the connection 164 has a suitable amount of slack within the spring 168 which is taken up during the early rise of the work support before the guard is moved to expose the cutter 26. A stop 170 on the guard 160 arrests movement of the heel towards the cutter, and this movement is further controlled by the engagement of a stud 174 on the work support in a slot in a member on the frame. In another construction, Figs. 8 and 9, the tread face of the heel is clamped against a plate 200 by clamping mechanism 201, 202 pivoted to a block 205, which is pivoted to a member 209 and limited as to clockwise movement by a lug 210 and screw 211. The member 209 is slidable in guideways in a bracket 213 by means of rack and pinion gearing to engage the cutter 216. The cutter comprises four blades 217, and is carried by a sleeve 220 mounted for rotation in a member 224<*>, which is pivoted at 225 to a frame 226 and adapted to be rotated by a belt 228 passing over a driven pulley 230. The frame 226 is rotatable on a sleeve 233 fixed in the machine frame, so that the cutter 216 can swing vertically to an extent limited by a cam block 234 and roll 235, and can be rocked about the sleeve 233 by an eccentric 236 rotatable on the sleeve 233 and driven from the pulley 231. On the eccentric is a strap 237, Fig. 9, pivoted at 238 to the lower end of a slotted arm 239, which is pivoted at 240 to an arm 241 projecting from the sleeve 233. In the slot in the arm 239 is a roll 242 carried by a link 243 pivoted to an arm 245, which is pivoted at 246 to an arm projecting from the sleeve 233. The arm 245 is slotted at 247 to receive a roll 248 carried by the frame 226. As the eccentric rotates this mechanism swings the cutter about the sleeve 233. To vary the extent of rocking, a second roll 249 on the link 243 is axially aligned with the roll 242 and enters a groove 250 in an arm 251, Fig. 8, extending from a shaft 252 rotatable in the sleeve 233 and adapted to be rotated by a treadle to move the roll 242 along the slot in the arm 239. When the roll 242 is aligned with the pivot 240 rocking of the cutter ceases, and at this time a cam 253 on an arm extending from the shaft 252 engages a roll 254 on the member 224<*> to raise the cutter about the pivot 225 for the scalloping cut. This movement is limited by a screw 255 and lug 256. As the cutter swings across the heel breast the latter is trimmed to a longitudinal curve corresponding to the. side portion of the cutter, and to a transverse curve owing to the movement of the cutter about the sleeve 233. At the same time the end portion of the cutter follows the curve of the shank and the cam 234 is designed to effect a slight movement of the member 224<*> about the pivot 225 to cause the lateral traverse of the end of the cutter to correspond accurately with the curve of the shank. In another construction, Fig. 13, work positioning and holding means comprise a last support, a heel-engaging plate, a sole-engaging member 261, and shank stops 263, 264 carried by arms 265, 266 adapted to be operated, to close the shank stops, by a wedge 272 actuated by a lever and rod connected to a clutch-controlling treadle. Cutters 275, 276, clamped to levers 277, 278 which oscillate about a common horizontal axis 279, each have straight and curved portions which respectively trim the breast face and the junction of the breast and shank. The lever 277 has a shaft 280 rotatable in a sleeve 281 projecting from the lever 278 and rotatable in a second sleeve itself rotatable and movable axially in a bearing in the machine frame. The levers 277, 278 are connected by rods 283, 283<*> to a camoperated lever on the main shaft. The cutters first perform a roughing cut, and are then retracted and moved rearwardly of the heel by rotating the second mentioned sleeve, which has formed in it a cam slot entered by a screw in the frame. The cutters then perform a finishing out, during which the cutters first approach each other, and then one is advanced past the centre of the breast and the other retracted by suitable cams on the main shaft. A rotary scalloping cutter is then moved into operative position by mechanism operated by cams from the main shaft. In a further construction, Fig. 15, the shoe is supported after the manner just described. A pair of shaped breasting cutters 301 are fixed on arms 303 formed respectively on a shaft 304 and sleeve 305 adapted to be rotated to operate the cutters by gear segments 307, 308, which mesh with gear segments suitably driven from the main shaft by cams so formed as to move one cutter past the centre of the heel breast after initial approach of the cutters. The shaft 304 and sleeve 305 are adapted to be raised during the cutting operation by a gear segment 310 and rack-teeth 309 on the sleeve 306, so as to shape the heel at the junction of the breast face and shank. A rotary scalloping-cutter 312 mounted in a slide 313 is adapted to be moved vertically, by a lever 317 and gear segments 315, 316, to operative position. The slide 313 works in a member 320 mounted in a curved horizontal slide 322 along which it may be moved by suitable cams to bring the cutter from the inoperative-position shown into position above and in front of the heel. Specification 2935/15 is referred to.