Patent GB-738390-A (GB)
Title: Improvements in or relating to machines suitable for levelling the bottoms of shoes
IPC: A43D89/00
Filed: 1952-09-02
Abstract: 738,390. Shoe-bottom levelling machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., and BARKER, W. A. Aug. 31, 1953 [Sept. 2, 1952], No. 22022/52. Class 17 (1). A shoe-bottom levelling machine comprises a shoe support, a levelling roll, means for bringing about relative traversing movement between the support and the roll to cause the latter to operate along the bottom of a shoe on the support, means for bringing about relative tilting movement between the support and the roll during the traversing movement and a device, e.g. the template 753, selected from a number of such devices to suit the particular shoe and temporarily assembled in a readily accessible position to control or modify the relative tilting movement to suit that..particular shoe. The support is moved to and fro to cause the roll to make a plurality of traverses along the shoe, the roll is tilted to occupy different angular positions during the movements of the support, and the device 753 modifies the tilting, this latter action being determined by the shape of the template and a to and fro motion imparted thereto. The support is moved by a power driven eccentric and a cam 449 acts (at desired times) to reduce the speed of this movement, shaft 17 is driven by motor 9 through sprocket 15 and clutch drum 21 when clutch members on the shaft are engaged with the drum through 27, 31 (not shown), 39 (not shown), 41, 65, 69, 71, when pedal 73 is depressed. A brake member on shaft 17 may be engaged with a non- rotatable co-operating member 47 through 61, 104, 103, 101 by depression of treadle 99. The clutch and brake are interconnected by rod 65 so that as one is engaged the other is disengaged. In the brake-engaged position block 75 on rod 69 is engaged by a plate 77 on cam lever 79, influenced by a part 93 of a cam 89, engaging the roll 85. When treadle 73 is operated to release the brake and then released, block 75 is disengaged, and cam 89 and spring 87 swing lever 79 clockwise and finally, part 93 of cam 89 again acts through roll 85 to swing lever 79 anticlockwise to engage block 75 and actuate the brake The machine has two jacks each comprising a toe rest 105, heel support 107, and last cone support 109. Each toe rest, carrying a toe gauge 135 adjustable vertically in holder 133 which is adjustable rearwardly and forwardly by means of adjustable stop screw 139 may rock forwardly and rearwardly on rolls 117, being limited by engagement of a recess 119 and pin 121 (not shown), and is adjustable heightwise on a jack post 143 by movement of wedge 147 by screw 149, the post 143 being rocked rearwardly and forwardly through arm 151. The last cone spindle 157 is slidably mounted in post 143 and urged upwardly by a spring, its position being adjusted by an adjustable rod 167 (not shown) which engages a face 168 (not shown) in spindle 157. The latter is raised slightly for the levelling operation through a ratchet block on the spindle the teeth of which are engaged by one of two pawls on an eccentric 195 (not shown). When the jack is in the normal position, Fig. 2, the pawls are held by springs against a bolt on side plates on the eccentric, but as the jack swings rearwardly these plates are swung counter-clockwise through 205 (not shown), 209, and roll 215'engaging the fixed cam part 225 so that the springs engage the pawls with the teeth of the ratchet block, and the eccentric, through the pawls, raises spindle 157. The amount of movement is adjusted by means of the screw stop 221 which determines the initial position of lever 209. During levelling, roll 215 moves on part 227 of the cam. Lever 209, through 231, 137 pulls gauge 135 from the path of roll 187. The well forward position of the jack, Fig. 3, is determined by the engagement of lugs 239, 241. The weight of the jack is partially counter-balanced by an adjustable spring. The heel post 155 pivoted to post 143 has a last pin 157 pivoted forwardly and rearwardly about 265 and laterally about 261, and a supporting pin 269 to engage the crown face of the last. The last pin holder 259 is locked by the engagement of teeth thereon with the teeth of a plunger 279 (not shown), the latter being engaged by a cam 281 carried by rod.283. With a last and shoe on the heel pin and toe rest, handle 311 is moved down, whereupon the toggle formed by 311 and link 309 straightens, pivoting levers 291 about 303 until the resistance of the shoe causes the levers to pivot at yoke 287 and raise a sliding member 307 (not shown). Block 351 on the latter swings a ratchet lever, the teeth of which move past a detent which is held down by a part of a controlling lever 333 (not shown). Before the toggle is fully straightened lever 333 has been turned by means of arm 311, and part 339 (not shown) thereof permits the detent to engage teeth on the ratchet lever locking the latter and member 307. In the last part of the movement of lever 311 levers 291 pivot at 303 and through rod 285 and adjustable spring 295 move the last pin rearwardly to press the toe of the shoe against the toe rest. Lever 311 is locked-in its lowest position by latch rod 319 when latch lever 317 is released. After levelling, the operator returns the parts to starting position by raising lever 311. As the toggle straightens, link 309 swings the pivoted arm 357 (not shown) and a pin thereon engaged in a slot in rod 283 pulls the latter downwardly to lock the last pin. Heel post 155 is adjusted towards or from post 143 by hand screw '367. If a stirrup 373 is used yoke 287 is swung from above spring 295. Arm 151 is engaged by a bolt 379 which is slidable in a jack rocking arm 381, pivoted at 145, and pressed by a spring 391, but as arms 151, 381 move upwardly after levelling, screw 413 moves trip arm 399 clockwise and through 409, 411 bar 397 is moved downwardly pivoting lever 387, and a stud 383 on the latter withdraws the bolt 379 whereupon the jack falls until stopped by lugs 239, 241. Further movement of arm 381 causes cam 419 and roll 407 to engage, disengaging 411 and 409..If the jack is not required to fall to the well forward position screw 413 is held in an inoperative position by plunger 421. An actuating link 427 for each jack has a block 425 mounted in an arcuate slot 423 in arm 381 and is pivoted to a common jack actuating lever 429. Adjustment of block 425 along slot 423 does not alter the position of the point of engagement of the roll 187 with the shoe, but alters the distance the shoe is moved rearwardly after engagement with the roll. Lever 429 is connected to rod 431 on eccentric 433 which is driven through 439, 441, and to guiding link 443 pivoted to bracket 445, and a roll 447 thereon engages in a groove in cam 449 on shaft 91. Teeth on cam 449 engage pinion 451 on shaft 453, the latter rotating three times and the cam once in each cycle. When the heel post 155 is adjusted toward or from the jack post link 461 is moved lengthwise through 453, 455, 457 and through block 467 adjusts block 425 along slot 423. Screw 465 may also be turned through 469, 471 by handwheel 477 to adjust blocks 425, 467 along 423 and 463 respectively, an indicator 479 aiding the adjustment. Each levelling roll .187 is mounted on a lever 489 pivoted on shaft 491 which is rotatable in bracket 493 on shaft 495 which is tilted through arm 499 and link 501. Arms on the tilting brackets are connected through 505, 509 (not shown) and 507 so that the rolls tilt the same amount in opposite directions. The levelling roll is lowered through 511, 513, when sleeve 519 is moved forward on shaft 495, adjustable springs 541 being overcome by cam 585 through roll 583, cam lever 577, thrust member 573, rocker member 557, the common guide member 561, 555, 553, 565, 567, 547, 537, 535, and 529. The roll is then pressed against the shoe through springs' 564, 571. To vary the distance the thrust member 573 is moved by the cam, the member is adjusted by hand lever 597 through 596, 595, 591, 589, adjustable screw 584 then engaging lug 586. If no shoe is present downward movement of roll 187 is limited by engagement of face 545 with casing 7. Lever 577 is held in the pressure applying position by a latch controlled by cam 609. The slidable actuating shaft 619 driven through non-slidable hub 629, rolls 639, chain 623 &c. from shaft 17 has worms 641, 643 of opposite thread which mesh with wheels 645, 647 carrying drums 653, 655 around which pass brake bands 657, 659. The drums normally rotate as indicated in Fig. 8 but if either brake band is applied shaft 619 will move lengthwise as it rotates, and through bellcrank 617, 611, and link 501 will tilt the levelling rolls. One end of the brake band is engaged by a spring held arm 665 pivoted on eccentric 667 to adjust the band, and the other end is moved to tighten the band by spring-pressed rods 671, 673 connected to brake lever 679 which is connected at 683 to a brake controlling lever 685 having a roll 687 engaged with flanges 689, 691 on the worms by spring 693. Link 695, pivoted to lever 685, has a block 697 pivoted at 696 and slidable against an arcuate face 699 on lever 701 pivoted at 702. Adjustable link 703 is connected to link 695 and to cam lever 705 on spindle 707, and arm 709 on spindle 707 has a pivoted cam arm 713 normally held as in Fig. 8 by latch 717. Roll 719 on arm 713 engages in groove 721 in cam 89. When the machine is at rest pivot 696 is in alignment with the axis of pivot 702, arid face 699 is concentric to the pivot between link 695 and lever 685, and up or down movement of link 695 does not move lever 685. In operation lever 701 is pivoted so that upward movement of block 697 against face 699 causes lengthwise movement of link 695 and movement of lever 685 about 683, so that roll 687 bears on 689 or 691 and lever 685 swings about 687 and moves lever 679 about 681 to apply one brake. Shaft 619 then slides and moves lever 685, and if lever 701 is stationary and movement of block 697 is stopped preventing