Patent GB-523681-A (GB)
Title: Improvements in apparatus for making and inserting metallic fasteners into layers of material to be united
IPC: A43D69/04
Filed: 1939-01-12
Abstract: 523,681. Nailing. AUTO-SOLER CO. Jan. 12, 1939, No. 1033. Convention date, May. 26, 1938. [Class 89 (iii)] [Also in Group XXV] A machine adaptable for attaching soles or heel lifts or for soleing stitchdown shoes, is arranged to cut, from roughened, lacquered wire, slugs which are bevelled at both ends, and to drive the slugs and clench them at both ends. Gauge means facilitate the positioning of the work, and are movable away from operating position. The machine comprises a column 1, a table 2, a horn 4, a head 7, a treadle 22 which effects, through a rod 25, all the operations of the machine. The fastenerforming and driving mechanisms are carried by a casing 12 detachably secured to the head 7. A block 42 within the casing has a guideway for a plunger 53 to which a driver 61, with a concave lower end, is detachably secured by a plate 55. The plunger is adjustably secured to a crosshead 123 on the rod 25 by a nut 182 with a rubber buffer 183. Wire from a reel 20 is fed through a slot 65 in the block and through a tube 109 by a feed dog 79, a hold-back dog 70 also being provided. The dog 79 is pivoted on a slide 77 which is raised by a spring 86 and has a projection 85 aligned with a pivoted cam member 94. When the treadle 22 is depressed, a plate 126 on the crosshead 123 rocks the cam member to impart the feeding stroke to the slide 77. The extent of wire feed is controlled by means of a stop which limits the upward stroke of the slide and which is adjustable by a handle 113. By displacing a stop 99, the cam member 94 may be turned out of the path of the plate 126 in order, to discontinue the wire feed. The lower end of the block 42 is V-shaped and fitted with a fixed knife 131 which has an arcuate, bevelled, surface 132, Fig. 20, and two fastener-receiving slots 134, 136. A movable knife 140 pivoted at 145 has a corresponding bevelled surface 150, Fig. 19, a fastener-receiving groove 153 and driver passage 152, and an extension 156 with a cam surface 157. Normally, the knife 140 is held, by a lever 161, so that the grooves 134 and 153 are in register to receive a length of wire advanced by the dog 79. When the plunger 53 descends, upon depression of the treadle, a cam surface 60 on the plate 55 rocks the knife 140, by engagement with the cam surface 157. This movement cuts off a fastener length and carries it to the groove 136, ready to be driven by the driver on the continued descent of the plunger 53. The bevelled surfaces 132, 150 cause the fastener to be bevelled at both ends, and the concave lower end of the driver acts to clench the upper end of the fastener after it is driven, Fig. 46. The horn 4, Fig. 1, is adjustable in a sleeve 233 which is raised by a roller 38 on a lever 35 when the treadle 22 is depressed. A full-stroke mechanism comprises a pawl 216 which engages teeth on the rod 25 and is disengaged by a projection thereon when a full stroke has been made. The horn has a detachable tip 251, Fig. 34, with concentric grooves which ensure clenching of the fastener even if it should be deflected while passing through the work. A work gauge 185 comprises a plate 193 which is adjustable on a member 190, Fig. 21, pivotally and slidably mounted in a bracket 186. The gauge can occupy the position shown in full lines when the machine is used for sole attaching, Fig. 34, or that shown in dotted lines when attaching heel lifts, Fig. 35. A spring 214 holds it in the dotted line position, and a spring- controlled catch 205 facilitates adjustment to either position or allows it to be turned aside to an out-of-use position for inserting fastenings across the shank. For securing heel lifts, Fig. 35, the horn tip is covered by a member 256 having a knurled cap 257 and spring clips 258. When used for re-soling stitchdown shoes, the horn tip is fitted with a cap 262, Fig. 43, which is secured by a screw 267 and has an inclined top 269 with concentric clenching grooves, and the gauge 193 is fitted with an extension piece 270. The wire reel, Fig. 31, comprises a hub 277 and side plates 278 rotatably retained in an open-sided casing 275 by a thumb-nut 286. An opening 290 facilitates removal of the reel, and the wire emerges from an eyeletted opening 289.