Patent GB-776361-A (GB)
Title: Improvements in or relating to machines suitable for operating on shoe soles
IPC: A43D8/36
Filed: 1954-06-25
Abstract: 776,361. Cutting machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). June 23, 1955 [June 25, 1954], No. 18625/54. Class 31 (1). [Also in Groups XVI and XXIV] A machine for marking shoe soles has a pressure head carried by a parallel linkage and arranged to carry a marking tool and movable downwards to press the sole towards a second tool for marking the lower side of the sole, the machine including a toggle for actuating the pressure head, and means for adjusting the lowest position to which the head is moved when actuated by the toggle means. As shown, a worktable 30, Figs. 5 and 7, has gauge rolls 36 and 38 for positioning an insole S, Fig. 10, laterally of the worktable for a marking and/or impressing operation. A movable head 50, Figs. 1, 5 and 12, carries presser members 52, 54 and 56 which press the insole S into engagement with dies 42, 44 and 46 respectively. A toothed indenting tool 58 carried by the head 50 co-operates with a die 48 to form indentations in the insole S to mark the breast-line, while presser members 60 and 62 co-operate with the dies 44 and 46 when positioned rearwardly of the table 30. Knives 64 and 66 are also carried by the head 50 for making incising cuts in the surface of the insole S. The head 50 has arms 68 and 70, Figs. 1 and 5, pivotally connected by a pin 72 to an arm 74 supported by a pin 76. The lower end of the arm 68 is pivotally connected by a pin 82 to an arm 84 pivotally supported by a pin 86, while the arm 70 is connected by a pin 88, coaxial with the pin 82, to an arm 90. Thus, the head 50 is held vertical during movement, since the axes of the pins 72, 76, 86 and 82 define a parallelogram. An eccentric 92 on a driving shaft 94 is coupled, by a connecting rod 96, to a toggle pin 98 which connects a link 102 and an arm 106 and a link 104 and an arm 108 respectively, the arms 106 and 108 being formed on a yoke 100 mounted on a pin 110 secured in arms 84, 90. The links 102 and 104 are pivotally mounted on a pin 112 having a notched central portion 114 to clear the arm 74. The ends of the pin 112 are secured in arms 118, 120 mounted on trunnions 122, 124, coaxial with the pin 98 when the rod 96 is in its most rearward position, i.e. with the head 50 raised. The stroke of the head 50 is adjustable by angular adjustment of arms 118, 120 about the trunnions 122, 124 by a bracket 126 pivotally connected to a sleeve 134 engaged by an adjustable screw 136 rotatable by a hand wheel 142 to move axially through a nut 138 to vary the height of the pin 112 in accordance with the thickness of the workpiece to be impressed and/or marked, the setting being indicated by a pointer 152 co-operating with scale markings on a plate 150. The presser member 52, Fig. 12, is secured by a screw 154 to a bracket 156 secured to the head 50, the member 52 being adjustable vertically by means of a slot 160 and adjusting screw 162. The presser members 54, 56, 60 and 62 are threaded into the head 50, and retained by locking plates, not shown. The indenting tool 58 is clamped to a rod 176 adjustable vertically in the head 50. The knives 64 and 66 are similarly mounted on the head 50. The knife 66 is clamped to a block 188 by a screw 190 extending through a horizontal slot 192 to permit transverse adjustment. A leaf-spring 196 is disposed behind the knife 66 and acts as a stripper to force a workpiece off the knife after a cutting operation. The block 188 is adjustably clamped by a screw 198 to a block 202 to permit forward and rearward adjustment by screws 206, 208, the block 202 being secured to the head 50 by a tongue and groove engagement which permits vertical adjustment of the block 202. The knife 66, Fig. 30, is secured on the block 188, slidably adjustable on the block 202, while the knife 64, Fig. 31 (not shown), is mounted on a block 1188 slidable on a block 1202 vertically adjustable on the head 50. The knives 66 and 64 are moved forwardly and rearwardly by a pivoted lever 772, Fig. 30, connected to a link 776 pivotally connected to the block 188. A similar link 784, Fig. 31 (not shown), pivotally connects the lever 772 and block 1188. When the lever 772, Fig. 30, is rocked, by manually sliding a rod 792, the knife 66 is moved in the opposite direction to the knife 64. The pivot of lever 772 is secured in a lateral extension 804 of an L-shaped slide 806. A U-shaped slide, comprising parts 818 and 820, and a part 816, Fig. 31 (not shown), is secured on the head 50, Fig. 30. Screws 834 and 832, Fig. 31 (not shown), threaded through the part 820, engage the rearward ends of links 784 and 786, Fig. 30, to determine the rearward positions of the knives. The die 42, Fig. 5, is mounted upon an electrically-heated block 216 supported on springs 222 to permit yielding and tilting under the pressure of the presser member 52. Each die 44 has a stem which fits into one of a plurality of holes formed in a slide 224 movable transversely of the machine to bring a selected die into an operating position beneath the appropriate presser member 54 or 60. The slide 224 can replace a blank slide 246 when it is required to position the dies 44 beneath the member 60. Size marking dies are carried by a wheel 228 secured to a shaft 234 rotatable to bring a required die into operative position by a hand wheel 236. The hand wheel is integral with a dial 238 carrying numbers corresponding to the size marking dies which register with a stationary pin 245, the hand wheel normally being held locked by a coil spring 242. The die 48 is fixedly mounted in a recess in the table 30. Positioning workpieces.-A heel end gauge 40, Figs. 7 and 10, is secured to a member 250 forming part of an H-shaped slide 252 also having members 254 and 256. The slide 252 is slidable along a lower slide 260. A block 274 has a pin 276, Fig. 5, carrying a rotatable block 278 engaging a worm 280 on the shaft 234, rotation of the shaft 234 by the hand wheel 236 causing sliding of the block 274. To permit adjustment of the heel end gauge 40 independently of the hand wheel 236, a key 288, Fig. 7, engages a slot 290 in the member 254 and is clamped at required positions along the slot by a screw 302, a pointer 298 on the slide 252 co-operating with a scale 300 to indicate such positions. Alternatively, a rack 600 and pinion 602, Fig. 17 (not shown), is provided for adjusting the slide 252, Fig. 7. Edgegauges 36 and 38 are mounted on arms 306 and 308 pivoted on pins 310 and 312 secured to the table 30, Fig. 10. The arms 306 and 308, urged together by a spring 324, have extensions 314 and 316, the extension 314 having a slot 322. A block 318 mounted on a pin 320 secured upon the extension 316 engages the slot 322 to co-ordinate movements of the arms 306 and 308. When use of the gauge roll 38 is not required its supporting bracket 340 is turned through 90 degrees about a screw 344; similarly the roll 36 may be turned to inoperative position. A latch 364 normally retains the roll 38 in operative position. Driving arrangements.-A driven pulley 372, Fig. 1, drives the shaft 94 through a clutch, not shown, controlled by mechanism 374, Fig. 21, tripped by a treadle on a rod 376 or, automatically by insertion of an insole in a gauging mechanism, not shown. A pin 472, parallel to the axis of the shaft 94, is rotatably mounted in a disc 474 keyed to the shaft 94. The pin 472 has a half-round extension which can enter any one of a plurality of half-round recesses in an inner cylindrical wall of a ring, not shown, carried by the pulley 372, Fig. 1, to couple the shaft 94 to the pulley. A spring- pressed plunger 478, Fig. 21, in the disc 474 engages a head 480 on the pin to rotate the pin 472 into engaging position, while a lever 482 normally holds the pin in disengaged position. A pawl 484 holds the disc against retrograde rotation. The lever 482 is pivoted on a pin 486 and urged into stopping position by spring 488. The clutch is engaged by withdrawing the lever 482 from the pin 472 by rocking a lever 498 carrying a latch 492 engaging the lever 482 and connected to a rod 502 pivotally connected to an armature 504 of a solenoid 506. The solenoid 506 is energized by an electric circuit closed by engagement of the heel end of an insole S, Fig. 20, with a finger 448 positioned in a notch 444 of a heel gauge 440. An arm 450 pivoted on a stud 452 on a bracket 454 is held in engagement with the finger 448 by a spring 462. A lug 460 on the arm 450 engages a button 466 of an electric switch in a casing 468. After engagement of the clutch, an arcuate cam 510, Fig. 21, on the disc 474 depresses the latch 492 to release the lever 482, thus disengaging the clutch by rotating the pin 472. A guard 380, Fig. 3, not shown, protects the operator's fingers and facilitates the introduction of workpieces, while a sector 390, Fig. 21, engages a latch 392 forming part of the clutch mechanism 374 to prevent operation while the guard is raised. Adjustment for varying thickness of work. pieces.-A crank-arm 700, Figs. 22 and 24, is secured on a trunnion 122<SP>1</SP> also carrying a yoke 116. A tension spring 702 is secured to the arm 700 and to an extension 704 of a pin 821. As the head 50 descends the spring 702 turns the arm 700 to swing the yoke 116 forward and downward about the trunnions 122<SP>1</SP> and 124. A spacing link 706 is pivoted to the arm 700 and has a slot 710 engaging the pin 821 which controls the position of the yoke 116 in relation to the head 50 during its downward movement. Thus, the head descends idly until the presser members engage the workpiece which upon continued downward movement of the head causes the pin 112 to rise. This raising movement is opposed by a locking mechanism which permits only forward and downward swinging movement of the togglesupporting yoke 116 which holds the pin 112 against upward movement when the presser members engage the workpiece. As the connecting rod 96 comple