Patent GB-421814-A (GB)
Title: Improvements in or relating to fastening supplying
IPC: A43D71/00
Filed: 1933-06-01
Abstract: 421,814. Nailing; boots &c. BRITISH UNITED SHOE MACHINERY CO., Ltd., Belgrave Road, Leicester.-(United Shoe Machinery Corporation; 140, Federal Street, Boston, U.S.A.) June 1, 1933, No. 15795. [Classes 17 (i) and 89 (iii)] Relates to fastener-supplying mechanisms for handling unsymmetricalfasteningsand particularly to a mechanism for supplying to the jack of an inside heel-attaching machine nails of the kind comprising a bevelled point and an offset triangular head; and consists in means for taking the nails from a hopper where they are stored in bulk, releasing them singly into each of a plurality of raceways, arranging them in a definite angular position about their longitudinal axes, and discharging them in groups from the raceways to a loading device which transfers them to the jack, the angular position being maintained during the discharging and transferring operations. Thus, the nails may be positioned in the jack with the bevel of the point and the edge of the offset head disposed towards the periphery of the jack-top, whereby the nails, when driven, will turn inwardly of the heel periphery. Means is provided for actuating a separating device and the discharging device in unison, the latter delivering to tubes which are dismountable as a unit, and which, at their lower ends, are provided with individual nail-releasing shutters and are adjustable in position to suit different loader-blocks designed for different nailing designs. The loader blocks are replaceable according to the nailing design desired, and each block includes a nail-releasing shutter movable upon and individual to it. The mechanism is described as applied to the frame 30 of the heel-attaching machine disclosed in Specification 286,780. The shoe is supported on a jack 32 provided with nailing tubes which are adjustable for different nailing designs by mechanism as described in Specification 100,111, [Class 17 (i)], and are triangular in cross-section to accommodate the particular nails referred to, known as " shovel-headed " nails. The nails are supplied by a rotary hopper 52 to a grooved tray 56 carried by a frame 58 which is supported by a bracket 62 and is vibrated by levers 60 from a shaft 68. The nails pass from the tray to separated raceways 76 in which the nails hang by their heads on surfaces 78 and which are closed by a separator 82. The latter, at each actuation, picks off one nail from each raceway, the nails falling into curved raceway bars 92, Fig. 11, supported on the frame 58. Each bar 92 has a groove which at first is U-shaped, 94, and then becomes V-shaped, 96, so that the nail tends to advance down the bar with its shank at the base of the groove and its head directed upwardly, which is the desired position. For turning mis-placed nails, a break is provided in the bar 92 at 98, where inwardly and downwardly curved surfaces 100 are provided, which engage and turn the offset head of any mis-placed nail before the V-shaped groove is re-established at 104. A device at the foot of the bars 92, for discharging the groups of single nails head downwards to the loader block, consists of a roll 106 in which are triangular passages 108 movable between positions of alignment with the bars 92 and with nail tubes 110. The roll is mounted at one end in a dismountable sleeve 114 and at the other end is separably coupled to a shaft 120 carrying a bevel-gear 130. The roll carries fingers 124 adapted to enter and close the grooves 96 when the roll is in nail-discharging position. The gear 130 meshes with a gear segment 132, Fig. 3, carried by a shaft 134 on which is a spring which, under tension, turns the roll 106 to nailreceiving position. The separator 82 is of the type which makes its separating stroke under control of a spring 86. For actuating the roll 106 and separator in unison, a slide member 140 is adapted to be engaged and moved by a hook member 148, a roll on the member 140 then engaging the separator and moving it against its spring 86, and a projection 142 on it engaging with an arm on the shaft 134 to rotate the roll 106. The hook member 148 is lifted into driving engagement with the slide 140 by a link 166, shaft 174 and rod 180 actuated from the main cam shaft of the machine, a projection 184 on the link 166 at the same time releasing a latch 186 which normally acts to hold the roll 106 in nail-discharging position. The member 148 receives its driving strokes through a lever 150 and a rod 154 which is actuated from a cam 162 controlled by a hand lever 164 as is the cam referred to as 106 in Specification 286,780, [Class 17 (i)]. The arrangement is such that, as the separator passes a load of nails into the raceways 92, the roll 106 is actuated to deliver its load of nails to the tubes 110, the fingers 124 closing the raceways 92. Thus, there is never more than a single nail in each raceway. The tubes 110, which have triangular passages, are carried as a dismountable group by a frame 200 secured to the bracket 62. The tubes are so twisted that the nail heads assume their desired final orientation, and they are connected to flexible tubes 212 joined to tubes 214. The latter terminate in a foot-plate structure P wherein they are adjustable for different nailing designs by means of a cam plate mechanism generally similar to that described in Specification 100,111 for adjusting the jack tubes. The passages in the tubes 212, 214 and foot-plate are triangular. The nails are retained in the foot-plate tubes 232, Fig. 19, by shutter members 246 individual to the tubes and partaking of their adjusting movements. The shutters are actuated simultaneously, to release the nails, by a cam plate 254 which engages projections 250 on the shutters and has slots 256 through which the nails fall into the loader block 272, Figs. 1 and 3, beneath it. A loader block is provided for each nailing design and is secured in a frame 270, and each block comprises a shutter 290, Fig. 21, individual to it. The frame 270 is carried by a slide 268, which is actuated by gearing 278, Fig. 1, as described in Specification 286,780, to carry the loader block from position below the foot-plate structure P to position over the jack 32. In the latter position, the shutter 290 is tripped, to release the nails to the jack, by the engagement of its projection 296 with the jack. The plate 254 controlling the foot-plate shutters 246 is connected to a lever 260, Fig. 1, adapted to be moved, to open the shutters, by a lever 264 actuated by a spring 282. Normally, the lever 264 is locked against shutter-opening movement by a latch 266. When the rod 180 is actuated in the operation of the machine, a lug 284 on it, Fig. 3, trips the latch 266. If, and only if, the loader block is in proper nailreceiving position, a depression 280, Fig. 1, in the slide 268 then allows the lever 264 to turn to open the shutters 246. After the nails have been released, nail-transferring movement of the slide 268 rocks back the lever 264 to close the shutters. In operation of the machine, the jack tubes and foot-plate tubes are adjusted for the nailing design, and an appropriate loader block is fitted in the frame 270. Actuation of the lever 164 causes the block to carry a load of nails to the jack, and the shutters 246 to close. The slide 140 then causes a group of nails to be picked off by the separator 82 and the roll 106 to deliver its nails to the tubes 110. The operator then jacks a shoe, applies the heel, and starts the machine. The heel-attaching nails are then driven, the latch 266 is tripped to open the shutters 246, the member 148 is moved into driving engagement with the slide 140 ready for its next stroke, and the latch 186 is tripped to allow the roll 106 to rotate to nail-receiving position.