Patent GB-190517432-A (GB)
Title: Improvements in or relating to Machines for Inserting Fasteners of Metal or Wire in Leather Goods and the like or for Producing as well as Inserting said Fasteners.
Inventor: BOULT ALFRED JULIUS
Filed: 1905-08-29
Granted: 1906-11-29
Abstract: 17,432. Boult, A. J., [United Shoe Machinery Co.]. Aug. 29. Nailing; nails.-In a wire slugging-machine, slugs are formed as required from a number of reels of wire and inserted in any one of a number of different predetermined designs. The machine is also applicable for use with previously cut nails. The slugs are partly inserted, preferably by the cutters, after which the required length is completely severed, the projecting portion is engaged by a movable member to feed the work, and finally the slug is driven home. The machine passes through a four part cycle of operations, namely : (1) placing the parts for actuating the work support inoperative position ; (2) placing the inserting mechanism in operative position and clamping the work rigidly ; (3) partly inserting a slug, cutting the wire, feeding the work, and rendering the inserting means inoperative ; (4) driving the previously partly inserted slug home and releasing the work support. The main shaft 6 is rotated by a belt pulley 8 causing a cutter-carrier head 16, Figs. 3 and 4, to reciprocate continuously in a frame 14, which is moved laterally to feed the stock at each cycle of operations by a lever pivoted to the head of the machine and operated by a cam 22 on the main shaft. The cutters 26, 26<1> are mounted in carriers 24, 24<1> pivoted at 25, 25<1> in the lower end of the head 16. Relative movement between the cutters and the carrier-head is normally prevented by a block 38, frictionallyconnected to the head by spring- controlled plates 40, 40<1>, Fig. 5. The block may be disconnected from the head by a plunger 54, which is engaged by a presser-bar 58 and forced against a plate 60 provided with dowel pins to engage the block 38 and clamp it against the frame. The presser-bar is operated by a rod 66, Fig. 3, which is actuated by a spring 70, and returned, to free the presser-bar, by an arm 80 mounted on a toothed barrel 82 and rocked into and out of operative position by a pawl 89, Fig. 12, operated by a pivoted lever 90 and a cam-roll 92 engaging a groove in the face of the driving-pulley 8. When the block 38 is held stationary while the head 16 moves downwards, the cutter carriers engage the hook-shaped ends 39, 39<1> of the block and are caused to rock on their fulcrums sufficiently to grip the wire, and, on the further descent of the head 16, to carry the wire down and pass the portion below the cutters through a feedplate 106 mounted in the lower end of the head 16. The block 38 is held stationary only for an instant, when its frictional resistance is overcome by the pressure of the cutter carriers and the block is carried down with the wire. During the greater part of the downward movement of the head, further inward movement of the cutters is prevented by spring controlled plungers 44, 44<1>, which are held against upward movement by levers 46, 41<1> engaging stops 50, 50<1> on the frame. When, however, the lower sides of the cutters engage the plate 106, the levers 46, 46<1> pass out of contact with the stops, allowing the plungers to yield and the cutters to move inwardly and sever the wire flush with the upper surface of the plate. While the bar 58 is in engagement with the plunger 54, the machine is operative for inserting fasteners. When the cutter-carrier head moves upwards, the plate 60 and block 38 remain stationary until engaged by a regulating-plate 64, Fig. 3, adjustably secured to the head 16 by a set-screw 65. The plate 64 overcomes the frictional pressure of the plunger 54, and the block moves upwards with the head. By adjusting the plate 64, the distance to which the block 38 is raised, and consequently the length of the fasteners, may be varied. The wire is drawn from superposed reels which are so mounted that their standards fit snugly end to end, each standard forming a support for the one above, so that an extra reel may always be added. The wire is drawn down through a checking-device 103, Figs. 3 and 4, then passes through a movable throat block or fastener presenter 104, mounted within the block 38, and is passed into the stock through the feed-plate 106, which oscillates with the frame 14. The feedplate is formed with a number of holes to receive the different strands of wire, and, after the wire has been severed and the work fed, on the next descent of the head 16 for inserting another fastener, a solid part of the plate 106 engages the previously part!y inserted fastener and drives it home. In order to guide the wire, the feed-plate is held some distance below the lower end of the head 15 by a dog 111, which is operated by the rod 66 and which engages the feed-plate after it has been withdrawn from the partly inserted fastener. The fastener presenter 104 is formed with holes to receive the different kinds of wire, and is reciprocated within the block 38, to which it is splined, so as to present the required selection of fasteners, by rack gearing 139, 144 operated by a lever 140, Figs. 3 and 6, controlled by a pattern cam 143, driven by worm gearing from the main shaft. The rack bar 144 is connected to the block 104 by means of an actuator bar 145, Fig. 6. Dogs 150, 151, controlled by a manuallyoperated face cam 162, control the relation of the actuator bar and rack-bar, and consequently determine the selection of fasteners presented. The work horn is connected by a link 171, Fig. 16, to a lever 172, pivoted to the base of the machine and connected by a rod 174 to a lever 175, Fig. 12, which straddles the continuously moving lever 90. When it is required to raise the work-support, the levers 90, 175 are locked together by a spring- controlled roller 178 carried by a rod 180 and normally held in inoperative position by a pin 188 on the arm 80 bearing on a spring 185 surrounding the barrel 82 and engaging the pin on the rod 180. When the treadle 190 is depressed, the pawl 89 is moved by a rod 191 and a spring-controlled block 195 into position to operate the barrel 82 at the next descent of the lever 90. This releases the spring 185, which elevates the rod 180 and roller 178 into operative position. In the highest position of the lever 90, the horn is slightly depressed to unclamp the stock while the work is fed. Fasteners are inserted continuously as long as the treadle is depressed.