Patent GB-174161-A (GB)
Title: Improvements in or relating to machines for handling heel nails
IPC: A43D71/00
Filed: 1920-10-15
Abstract: 174,161. British United Shoe Machinery Co., (United Shoe Machinery Corporation). Oct. 15, 1920. Loose - nailing. - A machine for handling heel nails is organised to deliver them to a holder in which they are retained, in accordance with one aspect of the invention, in staggered groups. The machine described is a modification of that described in Specification 155,361. After a holder, Fig. 7, is filled with parallel rows a of one series of nail gangs the holder is shifted angularly with respect to a feeding-bar and a second series of nail gangs is fed into holes b staggered in position with regard to the first. The nails are used in a machine for fixing heels on shoes. If more than 13 nails a in the example shown, are required for a shoe a sufficient number can be taken from the staggered holes b by moving the nail-holder in the nailing machine. Nails are delivered as described in the said prior Specification from a rotating drum 10, Fig. 1, thence down a reciprocating shoot 12 where by a known balancing device they are fed head first to openings in a discharge roll 16 temporarily closed by a stop-bar 18. On oscillation of the roll they are discharged through conduits into a reversing roll and thence down spring shoots 26 to a bar 70. The bar is aligned to deliver nails through a temporary lengthening-device 60, Fig. 4, arranged above thenail-holder 46, the bottom of which is closed by a tray 50. The lengthening-device allows the holder 46 to be filled with long nails in one set of holes and yet allows the lateral movement of the holder for further filling. The holder is pressed against a stop 52 by an abutment 54 on the lengthening-device, which is pivoted at 63 on arms 62 and is adjusted by screws &c. 67. The whole device is pivoted at 64 to a carriage 44 which takes the holder 46. The carriage 44 is drawn to the left by a spring 100, Fig. 1, and the motion is eased by a piston 120, Fig. 4, in a pneumatic cylinder 122 with an adjustable air outlet 124. The carriage is fed forward by a pawl 84 engaging ratchets attached to the undercarriage. This pawl and a stop-pawl 102 can both be released by an external handle 112 and rods 110 engaging pins 118. The pawl 84 is reciprocated by a slide 86, cranks 90, 94, and rod 96, Fig. 2, operated by a cam 32 frictionally driven off the main shaft 34. The lengthening-device 60, Fig, 4, can be raised by a cross-rod 66 to insert the nail-holder, and the bar 70 is raised for feed purposes by rods 78, 80, &c., Fig. 2, connected to the driving-cam 32. The adjustment of the bar 70 to the holes a or b is arranged by an eccentric 132, Figs. 3 and 4, and cam-slot 134, detent 136, and bar 140, which bodily shift the bar device 70 from the set of holes a to the staggered sets b. The motion is caused by a handle 142, Fig. 3, which rotates the rod 74 carrying the eccentrics and cam-disc. Automatic means are provided for stopping the machine when the sets of holes a are filled and similarly when sufficient of the sets b are filled. When a rod 40, Fig. 2, is supported on a surface 166 a stop-bar 38 is released from the driving-disc 32. This surface 166 is pushed away from the rod 40 and the machine stopped as pins 152 or 154, Fig. 3, set in holes alongside the holder 46 approach a spring-pivoted catch 156. The rod 40 is reset by a handle 170 with distance-piece 174, Fig. 2, engaging a projection 172 on the rod. The spring detent engages the moving stop 152 and the machines stops. The detent is then reset to engage the stop 154 by eccentric means 176, Fig. 3, operated by another eccentric 186 on the shaft 74 when the nail-feeding bar is shifted to holes b.