Patent GB-382643-A (GB)
Title: Improvements in machines for setting fasteners
IPC: A43D100/02
Filed: 1931-07-20
Abstract: 382,643. Machines for setting eyelets. JACKSON, L. MELLERSH-, 28, Southampton Buildings, London.-(Atlas Tack Corporation; Pleasant Street, Fairhaven, Massachusetts, U.S.A.) July 20, 1931, No. 20766. [Class 43.] In a machine for setting fasteners, particularly tubular fasteners such as eyelets, of the kind comprising upper and lower sets of punches and setting devices 16 .. 19 co-operating with a common die or anvil 41, 42 for simultaneously setting a pair of fasteners in mating pieces of material wand having means for moving the sets forwardly and rearwardly with relation to the operator so that they are operated alternately first to punch out the holes and then to set the fasteners in the work, there is provided a pair of stationary raceways 200, 201 for feeding the fasteners to both sets of punches and setting devices, the raceways being aligned with the forward and rearward direction of movement of the sets and laterally of the line of feed of the work. As is shown in Fig. 3, the punching and setting stations are well forward in the machine, there being no machine parts to interfere with the manipulation of the work. Setting-mechanism.-The machine frame 1 has transverse guideways 5, 6 for a slidable carriage 7, the motion of which is used for feeding the work. The carriage 7 has guideways 9, 10, Fig. 15, at right-angles to the line of motion of the carriage 7 for a slidable block 12 having projecting arms 14, 15 with aligned tubular openings therein; the forward ones receiving the punches 16, 17 and the rearward ones the setting tools 18, 19. The punches and the setting tools are normally held from each other by spring-pressed levers 20, 21, Fig. 4, and spring-pressed levers 32, 33, Fig. 1, respectively. The block 12 also carries a member 40 projecting between the upper and lower punches and setting tools and having setting portions 42, Figs. 14, 19, and a removal anvil piece 41. The block 12 with the member 40 and the punches and setting tools are reciprocated by means of an edge groove 90 in a cam 82, a cam roll 91, Fig. 14, a slide bar 92 formed with a head 95 sliding in guideways in the block 12. The cam 82 is fixed to a shaft 134 driven by spiral gears 133, 132 from a main driving-shaft 128. The punches and setting tools are actuated by means of hammer arms 100, 101 journalled on shafts 64, 65 carried by the frame 1 and having formed integrally therewith arms 110, 111 provided with meshing gear segment portions 112, 113, thus ensuring simultaneous and opposite rocking of the arms 100, 101. This rocking is produced by connections to the arm 101 comprising a cam lever 120 on the shaft 65 engaging at its forward end a yieldable member such as a spring 122 surrounding an adjustable screw 121 passing through the lever 120 and threaded into the arm 101, and provided at its rear end with a cam roll 125 running in a groove in a cam 127 carried on the shaft 128. This yieldable connection acts as a safety device should the punches or the setting tools or both be so adjusted as to give excessive pressure. Each of the arms 100, 101 is provided with punch and setting tool actuating heads 140, 141, Fig. 4, adjustable vertically by means of screws 145, 146 Work feeding mechanism.-The work is supported on a stationary work support 50 and is held there by presser feet 56, 57 provided with edge gauge blocks. The presser feet are fixed to rods 60, 61, Fig. 1, adjustably mounted in arms 62, 63 pivoted on the shafts 64, 65. A spring 72 extending between the arms 62, 63 acts to hold the presser feet in engagement with the work. Arms 66, 67 engaging one another by a pin-and-slot connection are carried on the shafts 64, 65 and have extensions 68, 69 each provided with an adjustable screw 70, 71 positioned to impinge on the adjacent arm 62 or 63 to move these arms away from each other when the arms 66, 67 are rocked and thereby to raise the presser feet, the rocking being synchronized with the work feed motion. The arms 66, 67 are rocked by the rocking of the arm 65 by means of a cam arm 80, Fig. 2, and the cam 82. The presser feet may be raised for the insertion or removal of work by means of a lever arm 85 having an extending pin 86 engaging the underside of the arm 80. The arm 85 is held normally out of contact with the arm 80 by a spring 88 but it is raised by depression of the rod 87 leading to a treadle or the like. The motion of the feed carriage 7 is derived from a cam 170 fixed to the shaft 134 having a cam groove 171, Figs. 4 and 15, within which rides a follower 172 extending from a lever arm 173. The arm 173 is pivoted at 174 to the machine frame and is provided with a longitudinally extending slot 176 within which rides a block 177 adjustable lengthwise therein. The block 177 carries a pivot portion 178 journalled in a block 179 slidable in a slot 180 in the carriage 7, the position of the block 179 in the slot being adjustable by means of stop pins 191 and perforations 190. By adjustment of the blocks 177, 179 in the slots 176, 180, the amplitude of the motion imparted to the feed carriage may be adjusted. Hoppers and delivery raceways.-The eyelets are fed from a hopper 203 having any suitable agitating means 204, Fig. 9, therein, e.g. rotary brushes mounted on a shaft having an actuating clutch head 205 with a diametrically extending fin 206 projecting therefrom and engaging a driving-member 207 so that the hopper may be removed or replaced while the member 207 is rotating. The member 207 is journalled in a block 208 which carries the mechanism for rotating the member 207 and is slidably mounted in ways 209, Fig. 8, extending from the machine frame. The driving mechanism comprises a worm wheel 210, a worm 211 having a hollow shaft 212 on which is journalled a driving- pulley 214 which may be clutched to the shaft 212. The clutch mechanism comprises a spring- pressed rod 227 having a laterally extending pin 215 which rides in a slot 216 in the shaft 212 and may engage a slot 217 in the hub of the pulley 214. The raceways leading from the hopper each comprise a comparatively wide strip 230, Fig. 17, and in parallel spaced relation therewith a pair of strips 231, the lower ends of the strips 231 being prolonged somewhat beyond the strips 230 to permit clearance of the spindles 160 of the setting tools 18 from the strips 230 as shown in Fig. 19. The eyelets are prevented from dropping off the lower ends of the raceways by any suitable means e.g. spring wires 235. The raceways are held in proper spaced relation somewhat above their lower ends by means of a U-shaped strip 240. The raceways may be adjusted laterally as a unit to bring their lower ends into proper position laterally relative to the setting tools by means of an adjusting screw 245 having a head 244 engaging a slot 243 in the strip 240. The raceways may be adjusted forwardly and rearwardly as a unit by means of an abutment screw 252 engaging the machine frame 1, the screw being carried by a hand-lever 253 pivoted to the frame and engaging at its lower end the forward end of the block 208, the block 208 being held forward by a spring 250. The hopper and raceways are supported by gravity and may be removed as a unit by simply lifting them, initial rearward movement by means of the lever 253 being useful to retract the raceways from the setting mechanism. The agitating mechanism for the hopper may be driven from the pulley 214 by a belt 260 passing round idler pulleys 261 and the grooved pulley portion 362 of the main drive-pulley 263. The pulleys 261 are journalled in a spring-actuated lever 262 thereby permitting forward and rearward motion of the block 208 without affecting this drive. Driving-mechanism.-The main drive-pulley 263 is journalled to the driving-shaft 128 with which it may be clutched through a clutch collar 265, Fig. 7, fixed to rotate with but slidable on the shaft 128. The collar 265 has fixed thereto a cam element 270 having a tapered cam surface 271, Fig. 13, merging into an abrupt stop face 272 and co-operating with this cam is a central rod 273 connected to a treadle or the like. Movement of the clutch collar in a direction to disengage the clutch faces is opposed by the action of springs 375, surrounding screws 376, which act when the clutch collar is moved toward the unclutching position to effect braking pressure between the clutch collar and the braking plate 377 slidably carried on the screws 376, thus tending to stop the rotation of the shaft 128 before it is positively stopped by the impingement of the face 272 on the control rod 273. Means may be provided for holding back the clutch collar from moving to clutching position on depression of the control rod when it is desired to turn over the shaft 128 while the drive-pulley 263 is being driven by power. This means comprises a vertically slidable rod 280 engaging a flange 268 on the collar 265 and actuated by a hand-lever 287, Fig. 11, having a laterally extending pin 289 extending between a pair of spaced pins 290 projecting from the rod 280. A boss 288 has a pair of sockets 293 into a selected one of which one end of a spring-pressed dog 294 pivoted to the lever 287 may be engaged so that the rod 280 may be held in raised or lowered position.