Patent GB-462124-A (GB)
Title: Improvements in or relating to machines for operating upon heels
IPC: A43D95/08
Filed: 1935-08-23
Abstract: 462,124. Scouring or otherwise finishing heels. BRITISH UNITED SHOE MACHINERY CO., Ltd. Aug. 23, 1935, No. 23644. Convention date, Aug. 27, 1934. Addition to 411,143. [Class 60] In a machine for finishing shoe heels, -the heel is rotated relatively to a scouring-belt or other tool to present successively different parts of its surface to be operated upon, during which time the aspect of presentation is controlled by a template, and the heel is held in clamping means in a jack comprising a driven rotary shaft journalled in a slide movably mounted in a second slide movable in a direction perpendicular to that of the first. In the machine shown, the heel 71 is operated on by a flexible scouring-belt 164 backed at the operative position by a fixed brush 172 having a profile corresponding to that of the heel; the brush may be of polygonal form having faces of different profiles, any one of which may be brought to operative position by turning the brush on its support. The base of the jack carrying the heel 71 is formed by a carriage 72 straddling a plate member 68 secured to the top of a rotary jack shaft 52, the carriage having rollers which engage in an arcuate slot 70 in the plate. The jack-shaft 52 is rotated through worm and wheel gearing from a splined shaft 62, thus rotating the heel to present the whole of the side and back surface to the belt. As the rotation takes place, a roller 88 on one arm of a bell-crank lever 84 pivoted on the plate 70 runs on a circular face cam 90, and through a link connecting the lever 84 to a slotted lever arm 76 moves the carriage 72 more or less to the right against the action of a spring, the carriage wheels running in the slot 70 and causing the heel to be more or less tilted. The cam or template 90, which thus controls the aspect of presentation of the heel to the abrasive belt during the rotation of the heel, is pivotally mounted and may be adjusted by a screw 90a. The shaft 52 is journalled in upper and lower bearings in a frame 46, which is slidably mounted in substantially vertical guides in a frame 40 itself slidable in substantially horizontal guides in a frame 32. This latter frame is pivotally mounted in blocks vertically adjustable in the slotted ends of supporting arms 14, and may be more or less tilted by adjustment of a nut 28 carried by a screw 26 pivotally attached to the frame and having a recessed portion embraced by the forked end of a fixed arm 22. As the shaft 52 rotates a cam 60 secured to its upper end, and maintained in contact with a roller 41 by springs 42 which draw the frame 40 rearwardly, causes the frame 40 to move in and out, carrying with it the frame 46, and all the parts mounted on it. At the same time the frame 46 is given vertical movement by a face cam 54 adjustably mounted on the shaft 52 and contacting with a roller 48 mounted on the frame 40. Thus the heel, in addition to the rotating and tilting movements, is given movements to and from the belt 164 and also movement in a substantially vertical direction. The heel is supported on a toothed plate 98 carried by a slide mounted on the carriage 72, and adjustable lengthwise on it by a screw 96. It is clamped in position by a toothed dog 146 having a ball-and-socket connection to a screwed rod 144, Fig. 9, which is mounted in a casing 138 carried by an arm on the upper end of a vertically-movable rod 128 which is forced downwardly by a spring 132 under control of a cam 122 on the shaft 52. The rod 144 carries an upper coned nut 158 and a lower nut 148 pressed down through an intermediate ball race by a cup member 154 acted on by a spring 156. In clamping position, the parts take up positions such as are shown in Fig. 9, the rod 144 thus being able to float so that the dog 146 may follow the movements of the heel. At the end of the operation, the cam 122 lifts the rod 128 through a lever 124, thus raising the dog 146 from the work, the rod 144 which carries it then centralizing itself before it is lowered on to a new work-piece at the beginning of the next cycle of operation. The work is ejected by an arm 102 pivoted on the side of the carriage 72 and capable of entering a slot in the rear of the plate 98 carrying the heel. It is held against the work by a spring sufficiently strong to cause it to eject the work when the clamping means are released, but is withdrawn from the work by the action of a cam when the machine is in the loading position. This cam may have a tooth which withdraws the arm from the work just before ejection and then frees it to allow it to give an ejecting blow. The jack-shaft 52 is driven through worm and wheel gearing and a onerevolution clutch 66 by a shaft 62 which is splined to the worm and provided with universal joints to allow for the movement of the jackshaft. The clutch is thrown into operation by a pedal, and after a single rotation of the jackshaft the machine comes to rest.