Patent GB-1151923-A (GB)
Title: Improvements in or relating to Machines Adapted for use in Performing Finishing Operations Upon Shoes.
IPC: A43D25/06
Filed: 1966-06-08
Abstract: 1,151,923. Boots &c. BRITISH UNITED SHOE MACHINERY CO. Ltd. 8 June, 1966 [9 June, 1965], No. 25448/66. Heading A3B. A machine for performing finishing operations on the heels of shoes has a rotatable shoe support 12 and a finishing tool 6 which is moved into yielding engagement with the shoe heel, the movement of the finishing tool being controlled by a cam so that the tool 6 moves into engagement with the heel only when the shoe is being rotated. As described the machine is an automatic heel scouring machine having a jack 12, a heel clamp 14 and a scouring disc 60 mounted on an arm 8. The jack 12, heel clamp 14 and associated mechanism are of the type described in Specification No. 1,057,324. The heel clamp 14 is mounted on an arm 16 which can be swung into position over the jack 12 by a pneumatic piston and cylinder (not shown). The jack 12 can move heightwise to clamp the shoe against the heel clamp 14 and can oscillate about a vertical axis so that the. scouring tool 6 can operate progressivly around the periphery of the heel. The scouring disc 60 (Fig. 7 is mounted on a shaft 62 which is driven by a belt and pulley system 66, 68, 70. The shaft 62 is carried by an arm 64 which is pivoted on studs 74, 76 on a hub 80 keyed to a shaft 72. The arm 64 is resiliently supported by a spring 86 carried at the end of an arm 82 fixed to the hub 80 thus allowing the scouring disc to move heightwise under the control of a feeler plate 122 fixed to the arm 64 and which engages the rand crease of the shoe so that the scouring disc 60 follows any heightwise variations in the periphery of the heel. When the machine is at rest the arm 64 is locked in its lowermost position by the actuation of an air motor 92, the plunger 94 of which engages a T-shaped member 96 connected by link 104 to the arm 64 to lower the arm 64. Movement of the scouring arm 8 towards and away from the heel is controlled by an arm 154 (Fig. 8) keyed to the lower end of the shaft 72. When the machine is at rest the scouring arm 8 is held inan out of the way position by an air motor 186 which is connected to a bell crank 200 having a roller 158 which engages the arm 154. The arm 154 is urged into contact with the roller 158 by a cable 162 connected to a tension spring 160. When the piston rod 204 of air motor 186 is retracted the bell crank 230 engages a stop 220 thus causing the bell crank and hence the arm 154 to be controlled by a cam follower 176. Thecam follower 176 has rollers: 172, 174 which engages a cam c mounted on the shaft 20 which carries the jack 12. The cam c has a main part corresponding to the shape of the heel and lobes 286, 288 which hold the scouring wheel away from the heel at the beginning and end of the machine cycle. The machine has a pneumatic control circuit which operates as follows: the operator places a shoe on the jack 12 with the toe pointing forwardly and depresses control valves V1 and V2 which causes the clamp 14 to swing into position and the Jack 12 to rise to clamp the shoe. At the same time the jack is rotated anticlockwise (Fig. 1) until the shoe points towards the operator's right. The scouring arm 8. then moves to its position adjacent the shoe (but being held out of contact with the shoe by the lobe 286 on the cam c): and the arm 64 is unlocked to allow heightwise movement of the scouring disc 60. The jack 12 then rotates clockwise and as it is rotating the scouring disc 60 contacts the heel and operates progressively around the periphery of the heel until it reaches the opposite side where it is moved out of contact with the heel by the lobe 288 on the cam c. At the completion of the scouring operation the various parts move back to their original positions.