Patent GB-552566-A (GB)
Title: Improvements in or relating to splitting, skiving or like machines
IPC: C14B1/14
Filed: 1941-09-12
Abstract: 552,566. Splitting boot soles. BRITISH UNITED SHOE MACHINERY CO., Ltd. (Unite) Shoe Machinery Corporation). Sept. 12, 1941, No. 11680. [Class 31 (i)] In a machine for splitting a workpiece into a sole part with a thickened part or island and an insole part with a corresponding recess the lower one of a stack of workpieces in a magazine is pushed by a pusher 11 between a roll 23 with a matrix depression 25 in its surface and a co-operating feed roll 21 on to a splitting knife 27 located between the rolls, the workpiece being pressed against the plain part of the roll 23 by a large number of spring fingers 526, Fig. 3, and part of it into the depression 25 by a number of more heavily pressed fingers 26. The matrix roll is mounted in bent arms 35 pivoted on a shaft 36 and under the influence of springs 39 and the feed roll 21 is mounted in similar arms 68 pressed by springs 70, the pairs of arms being adjusted for thickness of workpiece &c. by a spring rod 37, Fig. 7, extending across the ends of each pair of arms, the rod 37 being movable against the pressure of its spring 61 !by a screw 65 to the limit allowed by inclines 47, 49 in the rod engaging bevelended pins 51, 53, the upward movement of which is limited by adjustable screw caps 57, 67; thus the roll 23 cannot move upwards beyond its set position, but the feed roll 21 is permitted some free downward movement. The matrix roll 23 is readily interchangeableas shown in Fig. 6 by making the spindle 163 separable from the driving pinion 95 which latter terminates in a sleeve 155 fitted with an internal pin 161 adapted to be engaged by a slot 165 in the end of the shaft 163, detachment of which shaft leaves the roll free for removal in an upward direction. The side walls 13, 15, Fig. 8, of the magazine are carried respectively by rods 181, 189 slidable in fixed uprights 171, 173 and influenced by springs 183, 191, tending to move them apart but prevented from so doing by an interconnecting link 193 and clutch device 201. The latter is released by a trigger 203 whereupon the side walls are moved apart by the springs enabling the stock of workpieces to be inserted in the magazine, the side walls are then pressed together by the fingers to contact the workpieces and retained in this position by the clutch device 201. The side walls 13, 15 are also adjustable both together to the right or left by mounting the casting 205 carrying the link 193 connecting the supporting rods 181, 189 slidably on rods 207, 209, Fig. 9, along which the casting 205 is adjustable by a lever 219 pivoting about the axis 235 after a clutch device 229 has been released by pressure against the spring 233. The rear magazine wall 19 is carried by right angled arms 269, 271 pressed forwardly by springs 251, 253 against a member 240 carried by slide rods 243, 245 slidable in bosses integral with the fixed upright 171 and is adjustable towards the fixed knife 27 by a cam 255; the arms 269, 271 pivot about the rods 243, 245 and the arm 269 has a rear extension carrying a rotatable eccentric 277 coacting with a stop screw 287 for adjusting the height of the rear wall 19 according to the thickness of the workpieces. The front wall 17 of the magazine and the pusher 11 are mounted for transverse adjustment to locate the front ends of the workpieces in proper position relative to the symmetrical matrix 25 according as the workpieces are right or left, for this purpose the front wall 17 being carried by a member 347 mounted with a small amount of play on a block 349 slidaible along a bar 315 mounted on a parallel motion device comprising arms 325, 329 movable about pivots 345, 331, the arms constituting parts of levers 321, 333 connected together by the parallel link 335 so that bar 315 is moved transversely by swinging the-lever 321. The rear end of the bar 315 forms the base of the magazine. The pusher 11 has rigid therewith at front and back a roll 307 and block 309 engaging a slot 313 in the bar 315 and is connected at its front end to a cross slide 303 moving in a block 299 adapted to be adjustably secured by a clamp 301 along a guide 297 carried by a member 293 reciprocated by a lever 69 operated by a link 73, two armed cam lever 76 and groove cam 79 on shaft 81. Driving mechanism.-The shaft 81 which also drives the matrix and feed rolls through toothed gearing is driven through a worm 103, Fig. 4. clutch 99 from a continuously driven pulley 97. A spring 113 tending to force the clutch 99 into driving position is normally counteracted by a stronger spring 121 forcing the rod 115 and connected clutch part 99 to the right, the drive being started by rearward movement of the starting lever 131, Fig. 1, causing a cam 137 to rotate a shaft 143 straightening the toggle 129, 127 which actuates levers 125, 119 thus overcoming the pressure of spring 121 and allowing the clutch to be thrown in; the toggle is maintained straightened to continue the drive by a pin 147 carried by an arm 145 moving with the shaft 143 held by a spring 151 in contact with a projection 148 on the boss of the lever 69 until the completion of the forward swing of the lever 69 allows pin 147 to move under the projection 148 enabling arm 145 to be swung by spring 151 to break the toggle and stop the drive at the moment the rolls are in the exact position relative to the rear end of the next workpiece. The four more heavily spring pressed fingers 26 which press the middle part of the workpiece into the matrix are lifted so as not to impede the entry of the workpiece between the rolls by means of a pair of levers 381 carrying a cross pin 383 and roll 385 pressing on the four fingers and actuated by a link 387 forming with one arm of a bell-crank lever 389 a toggle device straightened by a cam 397 engaging a roller 395 and broken shortly after by a second cam 399 engaging a roller 393 on the other arm of the bell-crank 389. Delivery.-The split sole and insole parts pass respectively down inclines 32, 31 on to horizontal rotating tables 401, 403, one above the other and are guided by adjustable guides 419, 433 to compartments 413, 415. Duplicate matrix roll.-Instead of employing a matrix roll with a single matrix for both right and left soles a roll 523, Fig. 12, with duplicate matrices 524, 525 may be provided, the roll together with its driving pinion 595 being settable into one of two positions by the lever 597.