Patent GB-191026326-A (GB)
Title: Improvements in or relating to Nailing or Attaching Machines for Operating upon Heels, Top Lifts, or the like.
Inventor: BOULT ALFRED JULIUS
IPC: A43D79/00
Filed: 1910-11-12
Granted: 1911-11-09
Abstract: 26,326. Boult, A. J., [United Shoe Machinery Co.]. Nov. 12. Heels, machines for.-A machine for attaching heels and top-lifts is provided with heel and top-lift carriers which are loaded from magazines and are moved alternately over a stationary nail-block. The boot is supported on a jack 26, Fig. 1, pivotally carried by a slide 24 adjustably secured to a beam 22, which is driven through pivoted links 30, 32, a toggle 28, and a lever 40 from a cam shaft 14; the links 30, 32 are prevented from flexing by links 34, 36 pivoted respectively to the machine frame and to the upper end of a bell-crank 38. The stationary nail-block is shown at 20, and beneath it is arranged a vertically-movable spindle 42, which is actuated by an adjustable toggle 44, 46 and links 48, 50 from the cam shaft 14. The nails are supplied from an ordinary nail-assorting mechanism to a " mug " 79, from which they pass to a nail-carrier 56, Figs. 1 and 9, where they rest on drivers supported by a plate mounted on a screw post 87. The nail-carrier, when loaded, is moved by a link 52 pivoted about a stud 64, Fig. 2, to a position beneath the nail-block 20, and in this position it is clutched to the spindle 42 by a plate 89, Fig. 9, which engages between overhanging plates secured to the spindle. When this is raised, it carries the nail-carrier and drivers with it until the carrier meets the block 20, whereupon the driving-devices only continue to rise with the spindle to drive the nails through the block into the work. The screw rod 87 meanwhile enters into, and compresses, a spring 65 in a bore 63 in the spindle; a guide-post 69, Fig. 1, on the carrier also enters a bore in the spindle. A heelholder 62, Fig. 2, and top-lift holder 64, adapted to be loaded respectively from magazines 66, 68, are mounted for alternate movement about the stud 54, and are provided with adjusting-devices to correct their relative positions to suit the work on hand. When the holders are in attaching-position, the delivery ends of their magazines are closed by plates 72, 74; the plate 74 is furnished with an adjustable stop which positions the top-lift holder in proper alinement with the jack and nail-block. Each holder comprises a fixed rear gauge 76, and a spring- pressed movable breast gauge 78; the holders a r e automatically opened and closed as thev move into and then away from loading-position beneath the magazines. The heel and top-lift holders and the nail-carrier are operated from a clutch shaft which is driven from an auxiliary shaft 96, Fig. 1, having an independent drive to that of the main shaft 12, which controls the cam shaft 14. Both the clutch shaft and the clutch 15 on the main shaft are controlled by a treadle 160, and the arrangement is such that, when the treadle is first depressed, the clutch shaft is given half - a - revolution to move the heel-holder 62 and nail-carrier 56 from loading - position to a position beneath the shoe. Further depression of the treadle then throws the clutch on the main shaft into gear to lower the jack, and to raise the spindle 42 to drive the nails. Meanwhile, the treadle is released, which allows the clutch 15 to be thrown out of gear after a single revolution of the main shaft. When the treadle is again depressed, the clutch shaft is rotated through the second half of its revolution, causing the heel-holder and nail-carrier to return to loading-position, and the top-lift holder to move into attaching-position. Further depression of the treadle again throws the main shaft clutch 15 into gear to lower the jack to spank the top-lift on the heel. To compensate for the thickness of the top-lift, however, the jack is given a different limit of movement than during the heel-attaching operation. This is effected by the bell-crank 38, Fig. 1, which is moved by cam-operated links 92, 94 to shorten the effective length of the connexion formed by the links 30, 32.