Patent GB-1431127-A (GB)
Title: Machine for roughing the margin of an upper of a shoe assembly
IPC: A43D37/00
Filed: 1974-08-08
Abstract: 1431127 Shoe roughening machines INTERNATIONAL SHOE MACHINE CORP 8 Aug 1974 [30 Aug 1973] 35057/74 Heading A3B A machine for roughening the margin of the upper of a lasted shoe having a shoe mounting portion 10, Figs. 1, 3, to hold a last with the shoe upside down upon it, and a tool portion 12 slidable backwards and forwards by a pneumatic servo 144 and including a roughening tool 210 movable up-and-down, has a control bar 300, Fig. 14, slidable back-and-forth beneath the roughening tool with a sensor 302 (see also Fig. 16) at its front end engageable with the side of the shoe during the roughening process to control the sliding movement of the roughening tool 210 towards, &c. the shoe. The lasted shoe assembly is initially mounted by the operator upside-down on a last pin 24, Fig. 1, and a valve is tripped so that a servo moves a stand 30 towards the shoe and engages a toe pad 38 and stop 50 with the shoe toe, the pad and stop being moved to the correct heights by pneumatic servos. The shoe assembly is thus looked to a slide 18, Fig. 3, mounting the last pin 24, &c. The operator then trips another valve so that the roughening tool 210, the sensor 302, Fig. 16, and control tines 166, 166 (see also Fig. 14), are slidden down towards the shoe assembly by pneumatic servos. Simutlaneously, the sensor 302 is projected forwardly by a servo, and causes the servo 144, Fig. 1, to move the tool portion 12 towards the heel of the shoe assembly. The downwards sliding of the roughening assembly is terminated when the tines 166, Figs. 14, 16, engage the margin of the lasted upper, and the forward movement of the tool portion 12 towards the shoe assembly when the sensor 302 engages the side of the latter. Engagement of the tines 166 with the shoe assembly trips another servo to pivot the roughening tool down so that its bristles 368, Fig. 16, engage the lasted shoe margin, and at the same time withdraws a detent 134, Fig. 3, from a turntable 16 in which the slide 18 is carried. A clutch in a drive arrangement, Fig. 5 (not shown), is engaged to rotate the turntable 16, together with the shoe assembly. During rotation of the shoe assembly, the brush 222, &c. moves up and down by pivoting of its mounting, and towards and away from the shoe assembly as determined by the sensor 302. The brush housing also tilts about the forward-rear axis of a shaft 162, Figs. 13, 14, through which a bar 300 mounting the sensor 302 slides, so that the brush 222 is always perpendicular to the surface of the upper margin. When the turntable 16 has rotated through 180 degrees, its drive clutch is disengaged and the detent 134, Fig. 3, reengaged. The slide 18 is then powered to move across the turntable 16, carrying the shoe asembly 24, &c. with it, past the rotating brush 222, which roughens one side edge of the upper margin. On completion of this movement, the turntable 16 is released and rotated through another 180 degrees so that the brush engages the toe portion of the upper margin. During this process, the inclination of the margin edges causes the tines 166, Figs. 14, 16, to tilt about pins 168 and remain parallel to the margins, and the brush 222 is withdrawn slightly to engage the same area of the upper margin relative to its edge. Finally, rotation of the turntable 16 is terminated, and the various parts returned to their initial positions, so that the shoe assembly can be withdrawn.