Patent GB-1086960-A (GB)
Title: Improvements in or relating to machines suitable for use in the manufacture of shoes
IPC: A43D25/20
Filed: 1964-11-20
Abstract: 1,086,960. Boots &c. BRITISH UNITED SHOE MACHINERY CO. Nov. 20, 1964 [Nov. 21, 1963; March 17, 1964], No. 47275/64. Heading A3B. A machine for heating shoe parts comprises heating means and conveying means for introducing workpieces to and extracting them from exposure to said heating means, said conveying means comprising a plurality of movable trays, feed means for moving each of the trays, drive means, and means for coupling the drive means to each feed means whereby to convey the tray individually to and from the heating means. In a first embodiment, Figs. 1, 2, 3, the bottom of a lasted shoe 14 is heated by heaters 10 and an outsole 16 is conveyed on a tray 26 to a position where it is heated by heaters 12 to activate thermoplastic cement applied to the outsole. The trays 26 are supported by rolls 80 which run in guides 84 on the machine frame and have attached to their bottom surfaces brackets 92 which carry pins 102 slidable heightwise in slots 104 in the brackets 92. Each pin 102 can be moved heightwise in the slots 104 by the action of slots 112 in a lever 100 pivoted to the brackets 92 and 108 and is held at its uppermost or lowermost position by a latch 98. A pawl carrier 24 is supported by rolls 60 in guides 62 and is moved lengthwise in the machine by a piston and cylinder unit 22. Pawls 66 are mounted on the pawl carrier 24 in such a position that they will engage the pins 102 when the pins are in their lowermost operative position but will pass under the pins 102 when the pins are in their uppermost inoperative position. In operation, an operator places an outsole on a tray 26, depresses the lever 100 of that tray to bring the pin 102 into its lowermost operative position and depresses a foot switch 152 which causes the piston and cylinder 22 to be actuated, after a time delay determined by a timer 140 to move the tray under the heaters 12. When the tray reaches the operative position a cam 146 in the machine frame engages a roll 148 on the latch 98 to move the pin 102 to its inoperative position and a roll 170 engages a locking bar 164 on the pawl carrier 24 to pivot the bar 164 which engages the bracket 92 to lock the tray 26 in its operative position. After a time delay determined by a timer 150 the pawl carrier is returned by the piston and cylinder unit 22, a return bar 70 on the pawl carrier engaging the pin 102 to return the tray 26 to its loading position. In a modification, Figs. 6, (9, 10), the trays 22<SP>1</SP> are moved automatically in sequence into the heating chamber. The pins 86<SP>1</SP> which are engaged by the pawls are fixed to brackets 88<SP>1</SP> on the trays 22<SP>1</SP> and the pawls 82<SP>1</SP> are movable between a lower inoperative position where they pass under the pins 86<SP>1</SP> and an upper operative position where they engage the pins 86<SP>1</SP> by a cam 110<SP>1</SP> (Fig. 10) which engages pins 102<SP>1</SP> on the pawls 821. The cam 110<SP>1</SP> has cam surfaces 111<SP>1</SP> which hold the pawls 82<SP>1</SP> in their inoperative positions and notches 113<SP>1</SP> which hold the pawls 82<SP>1</SP> in their operative position. The surfaces 111<SP>1</SP> and 113<SP>1</SP> are so positioned that each pawl is moved to its operative position in sequence when the cam 110<SP>1</SP> is rotated. The cam 110<SP>1</SP> is moved through one increment of its rotation at the completion of each cycle by an indexing member 120<SP>1</SP> (Fig. 9) fixed in the machine frame, which engages pins 114<SP>1</SP> on the cam 110<SP>1</SP> when the pawl carrier moves back to its loading position. The trays 22<SP>1</SP> including locating plates 166<SP>1</SP> for positioning a heel attached to an outsole at a position below the level of the trays 22<SP>1</SP>. The locating plate 166 may be tilted by a screw (not shown) turned by handle 186<SP>1</SP>.