Patent GB-1193663-A (GB)
Title: Improvements in and relating to Shoe Upper Conforming Machines
IPC: A43D25/18
Filed: 1967-07-06
Abstract: 1,193,663. Coating apparatus. BRITISH UNITED SHOE MACHINERY CO. Ltd. 6 July, 1967 [7 July, 1966], No. 31085/67. Heading B2L. In apparatus comprising a support for a last positioning a shoe upper and an insole within the upper, and means for wiping upstanding marginal portions of the upper across the insole, means adapted to apply adhesive to the marginal portions of the insole immediately prior to the wiping operation include at least one adhesive-dispensinig nozzle, and means for moving the nozzle to describe a path along said marginal portion, the nozzle being so mounted as to permit variation in said path, and the arrangement being such that the nozzle is guided in said path by engagement with the shoe. The apparatus is a modification of the apparatus described in Specification 1,152,914. A last L, supporting an insole I and an upper U having an upstanding margin, is mounted on a jack 22 movable upwards to engage the insole with a fixed hold-down 30. The shoe heel is then pressed against the last by a heel clamp 42 mounted on a carriage 40 slidably supported by a frame 20. Carriage 40 is connected by a link 68 and lever 66 to the piston rod 64 of a fluid motor 62. Carriage 40 also supports a pair of heel-wiping blades (50), (52) adapted to be actuated by a fluid motor 72. A box-shaped frame 100, slidable on carriage 40, is connected to the piston rod 110 of a fluid motor 114, and carries pivotal links 170, 174, (172), 176 supporting a platform 180. Links 170, 174 are connected by a bar 230 to the piston rod of a fluid motor (236), energisation of which thereby serves to raise and lower platform 180. A pair of bell crank levers 182, (184) have their inner arms coupled by pin-and-slot connections to a crosshead 186 on the piston rod 188 of a fluid motor 192 mounted on platform 180. The outer arms of the bell crank levers carry respective adhesive-dispensing nozzles 200, each of which comprises a tubular body 202. A tubular extension 206, rigid with body 202, slidably supports a valve member 214 biased by a spring 215 against a seat 212 in extension 206, a stem portion 220 of valve 214 then projecting through a discharge orifice 210 in extension 206. When nozzle 200 is lowered to engage extension 206 with insole I, valve 214 is raised off seat 212, and adhesive, heated in body 202 by electric elements, flows through orifice 210 and a cut-away 216 in the end face of extension 206. The bodies 202 are connected by respective flexible conduits 132 to an elongated chamber 128 connected by a bracket 126 to an arm 140 extending from frame 100, and adapted to melt the leading end of a rod R of thermoplastic adhesive. The latter is fed into chamber 126 through an inlet 130 and passes through a tubular guide member 150, supported by posts 142, 144 on arm 140, to a supply reel 156. A feed block 152, slidable on member 150, is connected to the piston rod of a fluid motor 164, and carries a pair of feed pawls 154 which pass through slots in member 150 to engage rod R. After a shoe assembly S is clamped between jack 22 and hold-down 30 an automatic sequence of operations is initiated, whereby motor 62 is energised to advance carriage 40 for applying clamp 42 to the shoe heel, and motor (236) is energised for lowering nozzles 200 to engage the insole at rearmost positions. A cam surface 320 on link 174 engages a roller 322 to actuate a valve (324), whereby motor 164 is energised to advance block 152 for feeding rod R. A cam 334 on block 152 thereby engages a roller 336 to actuate a valve 338, whereby motor 114 is energised to advance the nozzles 200, and motor 192 is energised to bias nozzles 200 outwardly. Nozzles 200 thereby follow curved paths determined by engagement of the extensions 206 with the upstanding margin of upper U. Movement of the nozzles ceases when a cam block 358, adjustably mounted on carriage 40 by means of a screwed spindle 360, engages a roller 354 to actuate a valve 356 mounted on frame 100. Motor 236 is then energised to raise platform 180, whereby cam 320 releases roller 322 and motor 164 is energised to return block 152 to its initial position. Cam 334 thereby releases roller 336 and motors 114, 192 are energised to return nozzles 200 to their initial positions. When roller 354 disengages from block 358, motor 72 is energised via a valve (372) which was 'actuated by engagement of a roller 374 and a cam surface 378 on link 174 when platform 180 was raised. The blades (50), (52) are thereby actuated to wipe the upstanding margin of upper U over insole I and into engagement with the beads of adhesive deposited thereon by nozzles 200. An abutment 380, movable with the wiper mechanism, finally engages a roller 382 to actuate a valve 384, whereby the wiper mechanism and carriage 40 are returned to their initial positions and jack 22 is lowered.