Patent GB-1519145-A (GB)
Title: Shoe upper conforming machines
IPC: A43D23/02
Filed: 1974-08-27
Abstract: 1519145 Lasting shoes &c BRITISH UNITED SHOE MACHINERY CO 26 Aug 1975 [27 Aug 1974] 37307/74 Heading A3B A side and heel seat lasting machine has a last mounted upon a support 15, 16, &c and powered side lasting rolls 1 with helical ribs, the support 15, &c, the lasting rolls and heel seat wipers 3 being relatively movable to move the rolls along the edges of a shoe assembly upon the last and to position the shoe relative to the heel seat wipers ready for the heel seat lasting operation. The side lasting operation may be performed either before or after the heel seat wipers have functioned. Initially, a pneumatic servo 80 is energized to slide a carriage 7 leftwards of Fig. 1 along bars 9 to the position shown, where it is retained by a lock device 85. A shoe assembly is placed upon the support 15, &c. A pneumatic servo 39 is energized to pivot the shoe support 15, &c upwards about a pivot pin 35 to engage the heel of the shoe assembly with a heel band 30. A servo 47 is energized to engage a locating foot 40 with the shoe insole. A jack post 19 mounting the shoe support 15, &c is held in its vertical position by a bar lock 20. The heel band 110 closes about and centralizes the shoe assembly. A cylinder 62 is energized to swing a lever 52, 54 about its fulcrum 56 and engage a sensor 69 with the toe of the shoe assembly, and a pneumatic servo 74 is energized to engage a toe pad 72 with the shoe toe. A stop rod 90 has now been positioned so that after withdrawal of the locating foot 40, the servo 80 draws the carriage 7, shoe assembly, &c rightwards of Fig. 1 to a position determined by the lock 85, which is under the control of the stop rod. Adhesive is applied to the lasting margins through nozzles 2 carried by arms 26 turning about a pivot 28 under the control of servos 84. Each side lasting roll 1 is driven via a cogged belt 10 by an electric motor 150. Each roll 1 is journalled in a roll carrier 114 pivoted about a pin 116, Fig. 2. A support member 120 carries the pin 116 and is fast with the ends of a pair of arms 122 which turn about the pivot 28. The rolls 1 are urged towards the shoe assembly during a lasting operation by a servo 256. Arms 126, 128 extend upwards from each roll carrier and engage a servo 132 which adjusts the angular disposition of one roll carrier 114 relative to the other. The servo 132 adjusts the angle of the rolls 1 according to whether they are in engagement with a flat or curved portion of the shoe assembly insole, and is controlled in dependence on the position of the carriage 7 along the bars 9. Following side lasting by the rolls 1, the shoe support 15, &c and the carriage 7 are withdrawn into the machine. Adhesive is applied in the heel seat region, and the heel seat wipers are activated. A diaphragm servo 190 is actuated to raise the jack 19, the shoe support 15, &c, now positioned directly above it, to press the shoe assembly against the heel wipers. The servo 150 is then de-energized, and the bar lock 20 released, to lower the shoe support 15, &c and return it to the position shown. If the heel seat lasting operation is to be performed before, instead of after, the side lasting, the heel wiper assembly 3 is pivoted about a cross-shaft 160 and following heel wiping is raised away from the shoe assembly by a servo 176 actuating toggle links 162, 164. The shoe support 15, &c can then be slidden to the side wiping position by the servo 180 without adjusting its vertical position in the carriage 7.