Patent GB-643632-A (GB)
Title: Improvements in or relating to fastener-inserting machines suitable for use in the manufacture of shoes
IPC: A43D69/02
Filed: 1948-07-15
Abstract: 643,632. Nailing. BRITISH UNITED SHOE MACHINERY CO., Ltd., and FRAMPTON, S. E. July 15, 1948, No. 18994. [Class 89(iii)] In a boot nailing machine of the kind described in Specification 607,378, the tack pots, raceways and separators form a unit which can be swung away or entirely detatched from the rest of the machine to provide ready access to all parts thereof. The tack pots 11, raceways 13 and separators 115 are removably mounted in a hollow casting 9 which is pivoted on a vertical shaft 7. The tack pots have outwardly projecting pins 79 which engage slots 81 in the casting and slots 83 in the lower ends of arms 59 thereon to receive pins 85 adjustably mounted in the casting whereby the raceways may be adjusted to bring holes therein over tubes 228 through which the tacks pass to a tack block. The tack pot unit is clamped to the casting by bolts 111, each having a head 107 which engages over ' a lug 105 on an arm 59. Each bolt 111, which is slidable and rotatable in a sleeve 113 within limits determined by a pin 119 engaging stop faces on the sleeve, has associated therewith a hand nut 115 retained thereon by a nut 117. The casting 119 is secured in operative position by a bolt 123 passing through an arcuate slot 125 in a bracket 3 supporting the castings. The bolt carries a hand nut 137 operating similarly to the hand nut 115 to control a clamping head 133. The hand nut has a bevelled portion which engages a bevelled enlargement of an arcuate slot 129, in an adjustable plate 127 on the bracket 3. When disengaged therefrom, the tack pot unit can be swung away from the tack tubes 228 to provide access thereto. The tack separators 15 are operated by a lever 147 having two arms 149 provided with adjustable screws 151 to engage an arm 77 on one or other separators according as the lever is swung about a spindle 153 into an upper or lower position. A hand lever 209, Fig. 15, which is held in its end positions by a toggle arrangement including a spring- expanded element 211 raises or lowers the lever 147 through a link 197, levers 193, 185, link 181, lever 177, link 175, and lever arms 173, 165 and 159. The separator lever 147 is moved to operate a separator by a spring and is returned by a cam 261, Fig. 3, operating through a lever 257, 253, link 251 and an arm 249. The tack tubes 228 are moved up to the raceways at each operation of a separator by a lever arm 217 coupled by a link 221 to a member 227 carrying the tubes. The lower end of each raceway having a hole down which tacks pass can be swung away from its tube to provide access thereto. To prevent actuation of the hand lever 209 while the machine is in operation, a pivot pin 195 of the mechanism has an upward projection which engages a lug 265 on an arm 267 connected to the starting mechanism. Each tack pot 11 is provided with a lifting plate 31, Fig. 5, having a groove 33 with bevelled edges 37 to receive tacks and a bent up end 35, which is oscillated on a spindle 29 by fibre discs 49 thereon engaging yieldable shoes 53, Fig. 4, carried by arms 55 on a rock shaft 269. Shaft 269 is operated by a cam 289, Fig. 3, through forked levers 283, 271 engaging grooves in a collar slidable on the shaft 7. Stop faces 293 on the discs 49 cooperate with lugs 295 on the tack pots to ensure correct positioning when the unit is replaced in the machine. A block 67 is detahcably secured to the arm 59 on the tack pot 11 which supports the raceway 13 by a spring plunger 69 and covers the upper end of each raceway and port of the tack lifter near its pivot. The block has a finger 73 which is pivoted to its upper end and urged towards the tack lifter by a weight 75 and yields upwardly when engaged by an eccentric part of the tacker lifter. Specification 14453/97, [Class 89], also is referred to.