Patent GB-323992-A (GB)
Title: Improvements in tack-supplying mechanism for shoe machines, particularly for heel seat lasting machines
IPC: A43D71/00
Filed: 1929-05-07
Abstract: 323,992. Wade, H., (Maschinenfabrik Moenus Akt.-Ges.) May 7, 1929. Loose-nailing.-A nail-supplying mechanism, particularly for heel-seat lasting machines, is arranged to supply nails from a small number of raceways to a larger number of delivery tubes. The tubes are arranged on a carrier which is given a four-directional movement , so that each separator, which is operated four times in the cycle, supplies four tubes. The nail-supplying mechanism is driven independently of the main shaft of the machine, the nails being separated and supplied after the nail-driving operation and while the main shaft is at rest. The main shaft 3<a> for the lasting and nail-driving instrumentalities, is driven from a continuously-driven pulley 1 through a clutch member 2 and gearing 3, 4, 5, 7 and 8. The shaft 3<a> is declutched after one revolution. The nail-supplying mechanism is driven through a gear-wheel 10' fast with the pulley 1 and meshing with a gear-wheel 11 loose on a shaft 12<1>. The latter can be coupled with the gear 11 by means of a key 13, Fig. 3, which is provided with a finger 13<1> and is urged to coupling position by a spring 15. The key is held in inoperative position by the engagement of the finger 13<1> with a slidable frame 31, which is linked by a rod 29 to a second frame 33, and is urged downwardly by a spring 31<a>. At the end of the nail-driving operation, the frame 31 is raised by a lever 34 yieldingly-connected to the usually spring-operated lever 36 which operates the drivers. Thus, the shaft 12' is coupled to the driven gear 11 immediately after the nail-driving operation. The shaft 12<1> then drives a disc 19 formed with a cam groove for operating, through a roll 21 and link 25, a rack 26, Fig. 4, which serves to oscillate the nail-hopper 79. The frame 21 is held raised, against the spring 31<a>, for one revolution of the disc 19, by a cam 28 and roll 27. During this revolution, the rack 26 is moved once down and up. The machine shown is provided with five raceways 67<1> - - 67<5> from the hopper 79, each raceway having a corresponding separator 90<1> - - 90<5> which is operated four times for each revolution of the shaft 12<1>. The three central separators 90<1> - - 90<3> are carried by a frame 77 which is reciprocated yieldingly by spring plungers 88, 89, Fig. 8, on a frame 83. The latter is oscillated by a shaft 71 and a roll 80 engaging a cam groove 69 on the hopper 79. The outer separators 90<4>, 90<5> are carried by a frame 78 which is driven positively in one direction by the frame 77, and yieldingly in the other direction through a spring 91. These outer separators are arranged to be rendered inoperative for some or all of the four separating movements by causing the slide 78 to engage, at these times, a stop 93, so that the slide 77 moves alone. The stop 93 is in the form of a disc with cut-away portions which is given an intermittent rotary movement by means of a ratchet 95, pawl 96, and rod 98 operated by a cam on the hopper 79. If the separators 90<1>, 90<5> are required to separate the full four nails, no disc 93 is provided. Otherwise a disc is fitted which has a cut-away portion of a size to allow the slide 79 to make the required number of separating movements. A set of discs is provided, the appropriate disc being fitted before the machine is used. A carrier 50 carries the delivery tubes 1a - - 4a in two rows, Fig. 5, and is moved, in each tack-separating cycle, forwardly and rearwardly, and to the right and left, in order to present four tubes to each separator at moments corresponding to its separating movements. The carrier 50 is slidable, under action of a spring 53, in a frame 49 pivoted at 48. The frame 49 is connected, by an arm and a link 46, to a bar 75 having a roll 73 engaging a cam groove y in the rack 26, and the carrier 50 is connected to a thrust-rod 56 having a roll 54 engaging a second cam groove z in the rack. A pawl 62 pivoted to the machine frame and urged downwardly by a spring 64 has a pin 63 engaging a slot in a link 66 pivoted to the rack 26 at 65. The cam grooves y, z and the pawl 62 are so arranged that as the rack moves down and then up again, the frame 49 is first swung about the pivot 48 to present the tubes 1<a> to the separators, a set of nails then being separated. The frame 49 is then swung in the other direction, and the carrier 50 is moved forwardly, presenting the tubes 2a. Next, the frame is swung back to its first position, and the carrier is maintained in forward position; so that the tubes 3<a> are supplied. Finally, the frame is again swung, and the carrier retreats, presenting the tubes 4a.