Patent GB-111464-A (GB)
Title: Improvements in Lasting Machines.
IPC: A43D21/16
Filed: 1917-09-19
Abstract: 111,464. Reece Shoe Machinery Co., (Assignees of Perri, A.). Nov. 22, 1916, [Convention date]. Lasting and pulling-over.-A combined pulling- over and lasting machine, such as of the type described in Specification 101,286, is provided with a jack adapted to carry the shoe from an elevated pulling-over position to a lower location outward from beneath the pulling-over mechanism to a predetermined wiping position, and is arranged so that the various mechanisms may be readily reversed for operating on right and left shoes. The general arrangement of the machine is shown in Figs. 1 and 2, the jack 43 being positioned with the shoe initially as shown in dotted lines in Fig. 2 for being operated upon by the pulling-over mechanism 42, after which it is swung forwards and downwards so that the toe of the shoe points towards the operator, in which position side-lasting may be effected, and is then rotated about a vertical axis so that it finally extends horizontally between heel and toe .lasting mechanisms 45, 46; the jack may, however, be swung by hand or automatically from its initial to its final position in one step. The shoe is first positioned on a last pin 186, Fig. 2, forming part of the jack, and is then pulled-over, after which a jack clamp is applied and the jack then swung to bring the shoe into wiping position. The pulling-over mechanism is mounted on a vertically adjustable support 50, Fig. 2, and comprises a single toe-gripper 54 and two pairs of side grippers 55, 56, Figs. 1, 2, 3, and 6, which are under independent control by means of hand-levers 57, 58, 59, but are adapted to. be operated conjointly by connexions to a treadle 63; when this treadle is depressed, the three levers are thrown rearwards yieldingly to cause all the shippers to close on to and then to pull the upper, after which the several grippers may be independently operated by their respective hand-levers to correct any inequalities in the operation. The toe-gripper comprises a pair of jaws 72, 73 connected by non-parallel links 74, which are arranged so that when the outer jaw is advanced it swings away from the inner jaw and so gives a wide opening movement. The outer jaw 72 is pivoted to a tail piece 80 formed with a shoulder 82 adapted to be hooked over a block 83 mounted to slide freely on a shank portion 75 of the inner jaw 73. This block carries a pair of pins 84 extending into curved slots 85 in the operating handle 57; when this handle is thrown rearwards, the jaw 72 is first closed against the tension of a spring 79, and then the whole gripper is retracted against the tension of a second spring 77. The side grippers 55, 56 are in general of similar construction to the toe-gripper, but each comprises two independent pairs of gripping-jaws of which the lower is of greater longitudinal extent than the upper. The inner and outer jaws are bridged across by equalizing devices to allow the pull to adjust itself to the difference.in the thickness of material engaged by the two pairs of jaws. During the polling-over operation, the sole of the shoe bears on roughened pins or rests 122, 129, Figs. 3 and C. The pins 122 extend from the upright portion 121 of a bracket 120 mounted on top of the support 50, while the pin 129 is carried by a block 126 adjustable along one end of a swinging- lever 124 which is pivoted on a rock shaft 123 extending through the bracket 120; the lower end of the lever 124 carries a handle 125 for reversing purposes. The several grippers may be opened to release the work while they remain held in their rearward positions by the treadle 63 by movement of a hand-lever 131, Fig. 2, which, through connexions 132, 133, 134, 136, causes a pin 137 to lift the tail 80 of the toe-gripper, and, through connexions comprising a pair of horns 139 engaging pins 140 on a spring-encircled shaft 141, causes rockers 143 to trip the tails of the side grippers. In order that the pulling-over mechanism may be reversed to act alternately on right and left shoes, the shaft 123, Fig. 6, above referred to, carries a lever 144 yoked at its upper end to straddle and carry a sleeve 76 through which passes the shank 75 of the toe-gripper, while the lever 124 is coupled up to the side grippers through a resilient device 147, 148. Fig. 6 shows the grippers in position for operating on a right shoe, but by swinging the lower end of the lever 124 to the left, the grippers, through the connexions described, will be reversed ready for operating on a left shoe; adjustable stops are provided to limit the amount of swing. The pulling-over mechanism is provided with various adjustments for setting the grippers accurately for the work on hand. The last pin 186, Figs. 2 and 20, above referred to, is adjustably carried by a spindle 185 mounted in a yoked upper portion 184 of an L-shaped jack arm 175 pivoted about a stud 176; the arm is held in pulling-over position by a spring latch 177, while a counterbalance 180 .may be provided. The clamping-devices are carried by a frame 190 mounted directly on the spindle 185, and comprise a toe pad 204, side pads 205, and spring-controlled hold-downs 206, all of which stand normally away from the shoe but are moved to clamp the shoe on rotating a handwheel 209. The clamping-devices are applied after the pulling-over operation, and the jack is then swung about the stud 176 until the shoe sole is uppermost, in which position side-lasting may be effected, after which the frame 190 is swung about the spindle 185 through 90 degrees to bring the shoe between the toe and heel lasting heads; various locking and positioning devices are provided to hold the shoe firmly during these movements and to ensure its correct final location. At. this stage, the treadle 63 may be released to permit the several gripper mechanisms to return to their initial positions. The toe-wipers and their actuating mechanism are of the same construction as those described in Specification 109,609. They are carried by trunnions mounted in a rotatable bracket 266, Figs. 1 and 29, having a circular base pivotally supported on a plate 270, which is pivoted at 271 to a table 272 rigidly secured to a sliding support 251. This support, which is adapted to be raised during wiping by means of a treadle 252, is carried by a bracket 250 pivoted to an extension 39 of the base 37 of the machine. Between the bracket and the base 37 is arranged. a pivoted arm 253, which is adjustably secured to the bracket by a threaded rod 254 and is connected by a sliding pivot 260 to a lever 258 adjustably secured to the base 37. The pivot 260 is adapted to travel in a slot 261 in the arm 253, the arrangement providing for a quick means of advancing the lasting-head and locking it in operative position. In order to adjust the mechanisms for right and left shoes, the plate 270 is adapted to be swung about its pivot by a hand-lever 273, which carries a locking-handle 274 controlling link connexions to a locking-pin 275 adapted to engage sockets 276 carried by adjustable arms 277. The bracket 266 pivotally carries a rod 281 which passes loosely through a sleeve 282 swivelled on the table 272 and carries locking-nuts 283; when the plate 270 is swung, this connexion causes the bracket 266 to rotate to reverse 'the angle of wiping action. The heel-lasting head 45, Fig. 1, is carried by a swinging bracket 284 actuated by an adjusting-device 284a, the actual wipers being mounted on a support 287 adjustable in height in a carriage 289, which is movable towards and from the shoe by a rack and pinion actuated by a handwheel 290. The carriage 289 may be tilted on a platform 291 by a threaded shaft and wheel 292. the platform being carried by a rotatable carriage 293, Figs. 1 and 30, pivotally supported by a plate 295, which is pivoted at 297 to a table-like top 296 of the bracket 284. The plate 295 is formed with a reversing-handle 298 which is recessed to receive the threaded shaft 292 and also carries a pair of stop-screws 301. A similar pair of stop-screws 300 are carried by ears projecting from the table 296, while the rotatable carriage 293 is provided with a boss 299 threaded to engage a shaft 292. When the mechanism is to be reversed for operating upon a left instead of a right shoe, the handle 298 is moved so as to cause the plate 295 to swing until the forward stop-screw 301 engages the.shaft 292, whereby the lasting-head is shifted bodily across the machine. Continued movement of the handle moves the shaft 292 from contact with the front stop.screw 300 backwards into contact with the rear stop-screw 300, thereby swinging the carriage 293 about its pivot to direct the line of action of the wipers properly with respect to the median line of the heel' of the last.