Patent GB-434817-A (GB)
Title: Improvements in or relating to machines for operating upon the margins of boot or shoe soles
IPC: A43D43/02
Filed: 1934-03-08
Abstract: 434,817. Channelling boot - soles. BRITISH UNITED SHOE MACHINERY CO., Ltd., Belgrave Road, Leicester.-(United Shoe Machinery Corporation; 140, Federal Street, Boston, U.S.A.) March 8, 1934, No. 7344. [Class 31 (i)] A machine for operating upon the margins of boot or shoe soles, for example a channelling machine, is provided with an oscillating knife movable about an axis intersecting the plane of the sole and located at one side of the line of feed of the sole, and an oscillating feed device movable about an axis intersecting the plane at the opposite side of the line of feed. In the machine shown, which somewhat resembles that described in Specification 291,873, [Class 31 (i)], inner and outer channelling knives 42, 44 are provided which are movable about axis perpendicular to the plane of the work and on opposite sides of the line of work feed. The work is fed by vertically-reciprocating feed dogs 50, 52 carried by oscillating knife carriers 62, 64 which move so that while the work is fed by the feed dog on one carrier, it is being cut by the channelling knife on the other carrier moving in the reverse direction. The feed dogs may be provided with slashing or slitting knives on their lower faces to form shallow cuts at right angles to the sole edge and the inner channel; by removing the channelling knives, the machine may thus be adapted for making soles for cement process shoes by slashing only. The outer knife carrier 64 may also carry an adjustable vertical knife 58 in advance of the channelling knife 44 for reducing the width of the marginal lip E of the sole. The under face of the sole may be bevelled by means of a chamfering knife 60 which oscillates with an edge gauge. The machine is driven by an electric motor 80 connected by suitable gearing to drive the vertical driving shaft 70 which actuates all the various parts of the machine. The oscillating knife carriers 62, 64, Figs. 11 and 17, pivoted on shafts 156, 158, are provided with arms 168 connected by a link 166 and are oscillated simultaneously in opposite directions by a two-armed lever 66 pivoted at 172 to the machine head 74 and rocked by a cam 68 on the shaft 70; one arm of the lever 66 is coupled to the carrier 64 by a link 170 pivotally mounted on a rod 180, the link 170 carrying a roller 178 which engages with a groove 176 in the lever 66. The outer part of the groove is curved about the pivotal connection of the link 170 with the carrier 64 and the inner part of the groove may be curved about the same point or it may be eccentric thereto ; in the latter case, movement of the roller 178 into the inner part of the groove, in addition to decreasing the amplitude of the oscillations of the carriers 62, 64, relatively displaces the paths of movement of the channelling knives. This displacement may be used to facilitate swinging of the sole at the toe. The roller 178 is normally held at the outer end of the groove by a spring and a suitable stop, and may be moved inwards by depressing a foot pedal 658 which acts through suitable mechanism to move the rod 180, a screw 650 being adjustable to limit the inward movement. Movement of the carriers 62, 64 may be stopped while the machine is running by moving the roller 178 into line with the pivot 172. The inner channelling knife 42, Fig. 17, is mounted on a slide 186 which is slidable in the carrier 62, is pressed downwards by adjustable spring 224, and has its downward movement limited by stop lugs 232 thereon co-operating with shoulders on the carrier 62. The knife 42 is adjustable horizontally by a screw 204 and slot 206 and vertically in relation to a presser gauge 46, which is fixedly secured to the slide 186 by a clamp screw 214, by a screw 208 and slot 210 and a fine adjustment screw 216. The outer channelling knife 44 is mounted on a similar slide 188 and is adjustable horizontally by screws 254 and vertically by a screw 260 and slot 262 and a fine adjustment screw 264. The edge of the knife 44 may be inclined to the horizontal more than usual without any undue tendency to digging in, because of the shortness of the strokes of the knife. The presser gauge 48, Fig. 18, for the outer channelling knife is fixedly secured to an auxiliary slide 306 which is mounted in a vertical slideway 308 in the slide 188 and is pressed downwards by a spring 310. For operating upon insoles for welt shoes, the auxiliary slide 306 is fixedly secured to the knife slide 188 by a screw 318 so as to maintain a uniform thickness of the outer lip. For operating upon soles for turn shoes, the screw 318 is removed so that the presser gauge can yield independently of the knife so as to maintain a uniform thickness of the feather. The feed dogs 50, 52, Figs. 7 and 17, are adjustably secured by screws 328 and slots to rods 336 which are pressed downwards by springs 340 and have a pin 344 and slot 346 connection with outer sleeves 338. Each sleeve 338 has an upstanding ear 348 connected by a ball and socket joint 349 with the lower end of a link 350, the upper end of which is connected by a ball and socket joint 352 with a rocker member 354 pivoted at 356 and actuated by an eccentric 72 on the shaft 70 through a rod 364 and actuator member 362. The actuator 362 pivoted at 356 is connected to the rocker member 354 by a finger 370 which is pivoted to the rocker member and carries a stud 374 adapted to enter a notch 376 in the actuator under the action of a spring 377. The above arrangement is such that the feed is intermittent. Means are also provided to automatically stop the vertical reciprocation of the feed dogs when the work is removed from beneath them. A spring-pressed pivoted pawl 378 is adapted to engage with a shoulder 382 on the finger 370 to disengage the stud 374 from the notch 376, the pawl 378 being normally held out of engagement with the shoulder 382 by a rod 386 engaging its tail 390 ; the rod 386 is slidable in the rock shaft 156 and is connected at its lower end with the inner channelling knife slide 186 so as to move therewith. A spring-pressed plunger 392 normally held retracted by a pivoted latch controlled by the rod 386, is released to engage with a flat 394 on the rocker member to bring it to its central position so that the feed dogs are stopped in their mid-vertical positions. The work table 40, Figs. 3 and 7, comprises a disc having a depending central cylindrical stem 412 which turns freely in a supporting block 416. The edge gauge and the chamfering knife 60 are mounted on an auxiliary work support 422 which is oscillated about the axis 412 of the table 40 in unison with the outer channelling knife 44. The support 422 and a flat lever 560 are fixed to a vertical post 554 on which is loosely pivoted a plate 564 which engages between flanges 572 on a rocker member 566 loosely pivoted on the shaft 158 and adapted to be rocked in unison therewith by an offset post 568 on the rocker member extending upwardly between a pair of lugs 570 on the carrier 64. The table 40 and the auxiliary work support 422 are mounted on a carrier 420 and the table 40 has a dovetail connection 426 therewith to allow of its adjustment towards and away from the support 422. The carrier 420 is mounted for horizontal adjustment by a hand lever 508 to adjust the edge gauge 54, and for vertical adjustment by a hand wheel 470 for operation upon soles of different thicknesses, being held against rotation by a rod 448. The carrier is formed with a depending hollow stem 430 bearing in the central portion of a horizontal supporting arm 434 which is secured to a rock shaft 438 ; the arm 434 is swung for adjustment by an eccentric pin 444 on a disc 445 fixed to a shaft 446 which is operated by the hand lever 508. Three adjustable stops are provided so that different distances between the bottoms of the channels and the edge of the sole can be easily obtained at different parts of the sole. The end positions are determined by pins 510, 527 co-operating with shoulders 503, 528 on the machine head 74, and the middle position by a latch 512 on the hand lever 508 co-operating with a recess 514 in the arm 434. The carrier 420 is adjusted vertically by the hand wheel 470 which has a screwed stem to cooperate with a nut 454 bearing underneath the carrier stem 430 ; the hand wheel 470 is provided with a scale and is held in adjusted position by a spring-pressed pivoted latch 476 engaging with notches 478 therein. The carrer 420 is adapted to be lowered for the removal of work from the table 40 by depression of a pedal 490 which is connected by a rod 488 to a bell-crank lever 484, the upper arm 460 of which is connected by a link 458 and a ball and socket joint 482 to the carrier. The first part of the movement of the pedal 490 serves also to lift the channelling knives somewhat so that they emerge from the surface of the sole and allow them subsequently to drop. The channelling knife slides 186, 188, are raised by arms 580, 582, Fig. 9, on a rockshaft 584 engaging under the stop lugs 232, 282; the rock-shaft is operated from the pedal through a rod 602 Fig. 7, a bell-crank lever 598 and a crank arm 595, a clutch being provided so that further depression of the pedal 490 after the arms 580, 582 have reached their end positions causes teeth 606 on clutch sleeves 594, 608 to ride out of engagement with one another. The outer channelling knife can be lifted out of engagement with the sole so as to omit the outer channel over part of the sole by depression of a pedal 640 which acts in a similar way to the pedal 490 to rock an arm 616. To adapt the machine to soles for turn shoes, the outer channelling knife may be replaced by a shoulder knife which makes a shoulder cut instead of an edge slit.