Patent GB-803884-A (GB)
Title: Improvements in or relating to shoe upper conforming machines
Inventor: JAMES CYRIL HARRY
IPC: A43D21/12
Filed: 1955-10-12
Abstract: 803,884. Shoe upper conforming machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. Oct. 11, 1956 [Oct. 12, 1955], June 7, 1956], Nos. 29026/55 and 17570/56. Class 17(1) A shoe upper conforming machine having means 10 to support, in upright position, a shoe upper on a last, a plurality of grippers to tension the upper around the toe, and toe embracing wipers 18 to wipe the upper margins inwardly beneath an insole on the last bottom, has additional features as follows: (1) Means for pressing the outspread upper margins against the wipers as they wipe inwardly. (2) Means to cause the wipers to press more firmly against the inwiped upper margins. (3) The grippers comprise a toe end gripper 14 and side grippers 16 which move respectively, lengthwise and widthwise as they pull heightwise, and ball grippers 51 which move widthwise and toewards. (4) The ball grippers are closed on the upper and moved heightwise as a result of heightwise movement of the wipers, and are then capable of inward movement as the wipers move inwardly. The construction and operation of several components is similar to those described in Specifications 598.164 and 621.322. Grippers 51 mounted on brackets supporting gripper 16 partake of the adjustment thereof, and are also adjustably spaced from grippers 16 by means of screws 55. Grippers 14, 16 have fixed jaws 60 and movable jaws 62. The side grippers 16 are shaped as in Fig. 3, and their initial lengthwise positions are adjusted by hand levers 86. Movement of push rods 112, by known means, pivot arms 110 so that rolls 120 act on tails 122 to close jaws 62 partially. On subsequent downward movement of rods 104, wedge member 102 engage abutment members 128, first swinging jaws 62 to the fully closed position, and then moving the gripper assemblies downwards to tension the upper, adjustable rolls 130 engaging plane faces 132 to ensure that this gripper movement is substantially vertical. Whilst they are gripping the upper, grippers 16 may be adjusted together lengthwise in opposite directions by movement of lever 156, which locks arms 90, and lever 140 which rotates the arms and via links 88 moves the grippers. The support 10 comprises a plate 22 secured to a heightwise slidable and adjustable post 26, and having secured thereto studs 20 which engage the insole, and fingers 42 which support the insole margins and may swing inwardly against spring 48 (not shown) when the wipers wipe inwardly. A plate 38 which is supported on spring 36 surrounding studs 20 and may tip slightly, has an upstanding rim 40 and plungers 50 which are engaged by plunger 54 at the required time in the cycle. A rod 220, pivoted to the casting 200 which carries the wipers, extends through a trunnion pin carried by the member 214, which supports the vamp pressing member 232, and a spring 226 surrounding the rod supports the front end of casting 200, urging it upwardly relatively to member 214. Poweroperated means to raise and lower member 214 with casting 200 acts via links 210 connected to pivoted brackets 206 in which blocks 202 slide the latter being mounted on a stirrup 212 secured to the member 214 which is formed on pivoted arms 216. The rubber &c. pad 232 secured to a plunger 234 threaded to bolt 240 is urged downwardly by spring 246 and is initially adajusted heightwise by turning threaded sleeve 242. Downward movement of member 214 lowers the wipers and member 232 until the latter engages the shoe, then spring 246 yields, permitting further downward movement of the wipers. Member 232 is then locked against upward movement by engagement of pawls 258 with ratchet 256. As the wipers move downwardly, shoe position fingers 12 are withdrawn, and the wipers engage and close the spring-held jaws 63 of grippers 51, and then swing these grippers about 73 against spring 83, to pull the upper grippers 14, 16 then release the upper. During wiping, the upper is pressed by the wipers against flange 40 of plate 38 which yields downwardly, acting as a retarder and maintaining the tension in the upper. The ends of the spring steel toe band 300, which holds the upper tensioned after grippers 14, 16 are released and until the wipers inwipe, are secured via 302, 306 to the rotatable shaft 308, and the toeward portion is supported, normally in raised position, by a wire 356 from an arm 358 on the spindle of pawls 258. The band is normally held in retracted position by spring 324 acting through 317, 316, 314, 312, 308. When pawls 258 are operated, during downward movement of the wipers, arm 358 is swung and allows the toeward porton of band 300 to move down and rest on the wipers, and the known movement which occurs to open the side grippers also swings arms 332 to move plungers 326. and the latter via 328, 317, 316, 314, 312 and 308 pull band 300 heelwardly firmly about the toe. Screws 360 on plungers 326 act via push rods 364 and levers 366 to move side clamping members 376 (not shown) into engagement with the sides of the toe band. The wipers are then advanced and closed, plates 22 and grippers 51 acting as retarders. When wiping is completed members 376 and band 300 are withdrawn and the wipers are pressed upwardly by plunger 54. The clutch mechanism brings the machine to rest with the wipers applying heavy pressure, and further depression of the treadle by the operator is necessary to return the parts. Grippers 51 are returned by spring 89.