Patent GB-807339-A (GB)
Title: Improvements in or relating to shoe upper conforming machines
IPC: A43D21/12
Filed: 1955-12-02
Abstract: 807,339. Shoe upper conforming machines. BRITISH UNITED SHOE MACHINERY CO. Ltd., (United Shoe Machinery Corporation). Dec. 3, 1956 [Dec. 2, 1955], No. 34505/55. Class 17(1). A machine for lasting the heel end and adjacent side portions of a shoe having a shoe support, and heel end wipers and side wiping devices to wipe the lasting margins inwardly across the edge of the insole, the side wiping devices having portions which may take up curvatures to suit the heightwise curvatures at the shank, has the following additional features. (1) A pair of intermediate wipers which during wiping present wth the heel end wipers and side wiping devices a substantially continuous and uninterrupted wiping surface. (2) Power operated means move the heel end wipers lengthwise of the shoe, additional power operated means effect arcuate closing movements of the wipers, and control means control the arcuate movements in accordance with the lengthwise movements. (3) The side wiping devices comprise a carrier, a flexible wiper, and a control member movable relatively to the carrier to change the heightwise contour of the wiper to suit the contour of the shank. (7) The shoe support is moved from is determined by engagement with a heightwise movable abutment member, and the upper is controlled during inwiping by a member which extends beyond the abutment member and is yieldingly movable heightwise relatively thereto in response to pressure exerted by the insole during continued relative heightwise movement between the abutment member and the insole. (5) The upper controlling means includes a retarder, which engages the inner margins of the upper and the insole margins, and is movable inwardly in response to inwiping, and releasable spring means to resist this movement. (6) The retarder is moved first heightwise and then lengthwise to engage the insole at the shank. (1) The shoe support is moved from loading to operative position by power operated means, and the extent of movement is controlled in accordance with the size of the shoe so that all shoes are similarly located lengthwise relatively to the wipers. (8) The means to move the support are fluid pressure operated, and valve means lock the support against movement during wiping. (9) A U-shaped band embraces the heel at the loading position, and when the shoe support moves to operative position, the band moves with the support against yielding resistance and is snugly wrapped around the end of the shoe. (10) The shoe support is moved heightwise by fluid pressure operated means to position the shoe heightwise against an abutment member, and the pressure means then urges the shoe heightwise with greater force to cause the wiping means to press more heavily on the wiped over margin. (11) The retarder members co-operate with the wiping means to tension the upper heightwise, and each retarder is mounted for yielding arcuate movement inwardly and upwardly from the insole at inwiping. (12) A member holds the upper against the retarder in response to pressure applied by the upwiping means. The shoe support 80 comprises a carriage 120 which is moved lengthwise on a cylinder 122 when piston 160 is moved in the cylinder by fluid introduced at 166 or 168, and is raised, with the cylinder, when fluid introduced to cylinder 146 at 154 raises plunger 140 secured to cylinder 122. The cylinder 122 is partially counterbalanced by an adjustable spring 132. A vertically adjustable toe support 190 is slidable lengthwise of the carriage in guideway 174. Last pin 202 on block 192 is movable widthwise of the carriage, and carries rocker blocks which permit the cone engaging block to rock widthwise and lengthwise. Pivoted to a bracket 234 on the U-shaped heel band 84 is a member 242 which is spring-urged counterclockwise, Fig. 5, so that abutment member 250 engages a notch in the heel band and limits upward movement of the shoe. Member 250 is retracted by cams 328 acting via arms 244 when the centralizing members 88 are operated. The ends of the heel band are urged forwardly and outwardly by springs 274 acting via arms 272 and rods 270, the movement being limited by a rod 276 which is adjustable lengthwise and acts as an abutment to and within rod 236 connected to bracket 234. Springs 292 permit the ends of band 84 to approach, so that the band wraps around the heel end, when the band is moved rearwardly by the shoe. The centralizing members 88, normally retracted by springs 320, are moved to engage band 84 when fluid entering cylinder 286 moves crosspiece 308 with piston 240, and the latter, engaging bracket 234, moves the heel band forwardly. The extent of this latter movement is limited by the amount of swinging movement of members 88, therefore a shoe is always located in the same position relatively to the wipers. The non-rotatable side clamps 86, with upstanding portions 340 secured to piston rods 342, are moved into contact with the heel band when fluid passes through 360, 352 to move pistons 344, and are retracted when fluid passes through 362, 350. The heel abutment 82, normally raised by spring 402, is depressed by piston 394 when the latter is moved by fluid passing through 410, 412, 414, the extent of movement being adjusted by the lengthwise adjustment of the threaded head portion 384 by means of rack bar 420 and teeth 388. The pivoted retarder fingers 70 (not shown), 72 are moved downwardly by downward movement of abutment 82 and swung outwardly by springs 472 to the dotted line position Fig. 11, but when carriage 120 is raised the fingers are raised against springs 454, 456 (not shown) and act as insole holddowns. The shank grippers each comprise an inner jaw or retarder finger 74 or 76 (not shown) and an outer jaw 480 or 482 (not shown) pivoted at 490 and normally open as in Fig. 24. Early in a cycle of operation fluid from 604 moves piston 590 (Fig. 33) and as a result abutments 560 move downwardly, engage projections 540. and swing fingers 74 clockwise into position adjacent the upper, toggles 516, 518 being straightened. Later shank wipers 60 moving inwardly move jaws 480, 482 to close the grippers on the upper, and then swing the grippers inwardly to tension the upper, plungers 514 moving to the left (Fig. 24) against springs 524. Finally cam 544 engaging screw 542 breaks the toggle, and spring 530 swings fingers 74, 76 to open the grippers. Blocks 550 (not shown) carrying fingers 76 are urged upwardly relative to blocks 494, carrying fingers 74 by springs 556 and abut the shank-wiper control members 776, so that when the latter are adjusted, fingers 76 are similarly adjusted heightwise. When fluid is introduced at 834 and exhausted at 848 slides 496, integral with blocks 494, advance fingers 74, 76 until the foremost finger 76 engages the shank. The heel wiper carrier 624 is advanced when fluid introduced at 720 and exhausted at 722 (Fig. 5) depresses sleeve 704 so that bell-crank 694, which is linked to the carrier, is rotated. The carrier is retracted when the flow of fluid is reversed. The heel end wipers 50, having arcuate rib and groove engagement with the carrier and being linked to bell-cranks pivoted on the carrier, are swung in guided arcuate movement on the carrier to the closed position, Fig. 28, by movement of pistons 674 in cylinders 672 (Fig. 33), rolls on the bellcranks engaging grooves in the carrier and cam grooves in an adjustable cam plate to control the action. Telescoping intermediate wipers 638 pivoted to shank wipers 860 and slidable in guides on the underside of wipers 50 project outwardly into spaces 640 in plate 626, as in Fig. 28, during wiping. Carriers 730 carrying groups of shank wipers 60 are linked to sleeve 704, so that when the latter moves downwardly to advance the heel wipers the carriers 730 are advanced inwardly. The shank wipers each comprise a flexible blade with a thickened end 760 and a shaft 764, the latter with links 766 forming a chain 763 which is anchored at 768 and received in side guideways 782 on pivoted control members 776. The latter are locked in position by pawl 792 and ratchet 794, and adjusted, with the aid of scale 798, so as to position the wipers in accordance with the particular shank to be treated. When slides 496 advance fingers 74, 76 they also advance members 776, so that the curved operation surfaces of wipers 60 are moved lengthwise of the shoe. The fluid pressure system, illustrated in Fig. 33, includes a treadle-operated main control valve A, pressure reducing valves B, E, H, sequence valves C, D, F, G, I, a locking valve L, dump valve J, relief valves K, M, and pressure regulating valve X. In operation the carriage is pulled outwardly, as permitted by lost motion at. 170, 172 and the shoe positioned on pin 202 and member 190, depressed against spring 132, and moved rearwardly to engage heel band 84 and beneath abutment 250. The shoe is then released and the treadle depressed to start an automatic cycle. Piston 160 moves the carriage and shoe rearwardly, wrapping the heel band about the shoe. Piston 240 moves the shoe and heel-band forwardly, and engage members 88 with the heel band, cams 328 retracting member 250. Piston 394 moves plunger 380 downwardly and fingers 70 (not shown), 72 swing outwardly to operative positions. Piston 144 rises to press the shoe against heel abutment 82, and fingers 74, 76 are moved to operative positions by piston 590. n Pistons 344 move clamps 86 inwardly to clamp band 84 against the upper, and slides 496 advance fingers 74, 76, to engage the insole, and also advance wipers 60 (not shown) lengthwise of the shoe. Wipers 50 are advanced and closed by sleeve 704 and pistons 674, the former advancing wipers 60 widthwise of the shoe. Valve L locks the carriage against rearward movement during wiping. When wiping is nearly completed valve J causes piston 144 to press the shoe bottom firmly against the wipers. Finally v