Patent GB-1498396-A (GB)
Title: Machine for roughing the upper of a lasted shoe assembly
IPC: A43D37/00
Filed: 1976-08-24
Abstract: 1498396 Making shoes INTERNATIONAL SHOE MACHINE CORP 24 Aug 1976 [28 Aug 1975] 35219/76 Heading A3B A machine for roughing the margin of a lasted upper on a shoe assembly, wherein the assembly is supported on a slide 20 movable relative to a table 18 to successively present the upper margin to a roughing tool 274, and wherein the roughing tool is mounted on a housing 240 movable relative to a frame of the machine and responsive to operating means to maintain the tool and housing in a prescribed relationship to the side of the shoe assembly, is characterised in that interaction between an actuating member 123 carried by the slide and a control member 122 carried by the table is effective via an adjusting means connecting the members to a drive means in moving the roughing tool relative to the housing to place the tool in one of first and second positions on the margin each respectively spaced at a relatively greater and lesser extent from the periphery of the shoe bottom. In a preferred operation of the machine, means are provided for reciprocating the slide 20 relative to a turntable 18 between two end positions at which the turntable is rotated through 180‹; the slide being initially traversed in a heel to toe direction, of the shoe assembly with the roughing tool 274 engaging the upper margin in a first position spaced to a relatively greater extent from the assembly periphery, and maintained in this relationship under the action of operating means including a senser 294. When the upper margin in the region of the ball-break of the shoe bottom is presented to the roughing tool, an actuating cam 123 on the slide 20 interacts with a regulater control valve 122 on the table (see Fig. 7) during relative movement thereof, to initiate via an adjusting means connecting the valve to a pneumatic drive means, placing of the roughing tool into a second position at a relatively lesser distance inwardly of the shoe bottom periphery. The second position of the roughing tool is maintained by continuing co-operation of the cam and regulater valve during subsequent rotation of the turntable 18 to successively present the margin of the toe region of the assembly to the roughing tool and during the initial return movement of the assembly and slide whereafter the cam and valve disengage to revert the roughing tool to the said first position on the upper margin where it remains during the remaining toe to heel traverse. The shoe assembly is supported at the heel portion on a last post 26 (Fig. 7) and at the fore region by a toe pad 50 of a stand 38 movable on the slide from an inoperative to a working position relative to the post. The actuater member is similarly moveable between inoperative and working positions, but to allow for the fact that a smaller adjustment to this positioning is required when adapting the machine for varying shoe assembly sizes, than that required for the relative positioning of the stand and post, connecting means are operative between the stand and actuater member (Fig. 8 not shown) to transmit motion of the stand towards the post, to the actuater member and move it towards the control member at an amplified speed.