Patent GB-117940-A (GB)
Title: Improvements in or relating to Machines for Setting Eyelets, Hooks, or other Fasteners.
IPC: A43D100/02
Filed: 1917-08-04
Abstract: 117,940. British United Shoe Machinery Co., (United Shoe Machinery Co.). Aug. 4, 1917. Setting cyclets.-In a machine of the type in which eyelets or lacing-hooks are set simultaneously in two pieces of material, a double-ended tubular punch is employed, and the pieces of material are perforated by being forced upon opposite ends of the punch by movable punching plates; and the punch is provided with concentric upsetting-surfaces against which the barrels of the eyelets or other fasteners are clinched. The work is fed by the double-ended punch, and the feed is varied by varying the initial position of the punch by adjusting a hand-lever, the workguiding means being connected to the hand-lever so as always to occupy a predetermined position relatively to the initial position of the punch ; and the punching-plates extend in the direction of feed. Specifications 13084/99), 22048/03, and 114,472 are referred to. Setting-mechanism.-The double-ended tubular punch 40, Fig. 8, having upsetting-surfaces 41 is secured in a socket near the tapered end of a die plate 42, and a U-shaped spring stripping-device 46 surrounds the end of the plate and the outer ends of the punching-tool. Punching-plates 70, Figs. 3 and 4, carried by plungers 72 reciprocating in head portions 6, 8 of the framework, Figs. 1 and 5, are connected through links 74 to operating lowers 76, which are connected by toggle links 82, 83, these toggles being connected at their common pivotal point to a slide 84 working in the framework, and also to a rocking frame 88 oscillated by a cam 90 un the main driving shaft 20. The levers 76 may be readily detached from the links 74, pins on the links being retained in sockets in the levers by springs 75. Adjustable eccentric bushings are interposed between each lever 76 and its shaft for adjusting the pressure of the punching-plates. In operation, the punching plates force the work upon opposite ends of the punching-tool 40 and the arms of the stripping- device are depressed by the work, as shown in Fig. 3; the punching-plates are then slightly raised and the punching-tool feeds the work into the position shown in Fig. 4 between the setting- dies 100, as described below. The setting-dies, supplied with eyelete from a hopper 140 by movable raceways 144, work in the head portions 6, 8, and are connected by links to bell-crank levers 106, 104, these levers being connected by a short link 108; a curved block 114, which is pivotally connected to a double crank-arm 116 en the driving shaft 20 and works in a curved slot in a rearward extension 112 of the lever 104, serves to operate the setting-dies. The punchings are forced by the die spindles into the transverse bore of the punching-tool. When the setting-dies are retracted, the work is thrown off the tool by the stripping-device, and the punchings are ejected from the bore of the tool during its return movement by a pin 132 projecting from a guide plate 120 for the work. Work-feeding mechanism.-The die-plate 42 carrying the double-ended punch 40 is detachably secured to a sleeve 50, which turns on a fixed spindle, and is connected through linkages 54, 56, 58 to a reciprocating carriage operated by a cam on the main driving shaft. The initial position of the punch and the feed of the work are determined by the position of an adjustable member 67, which turns on a fixed spindle 69 and is provided with a hand-lever 63 adapted to be secured in any desired position on a fixed segmental plate 61, the member 67 being connected by a radius link 64 to the common pivotal point of the links 56, 58. The spindle 69 of the member 67 may be rotated by a chain and treadle. This mechanism also serves to determine the position of the work guide-plate 120, which is detachably mounted in an arm projecting from a sleeve mounted on the spindle of the sleeve GO and provided with a projecting arm 134 having a roller 136 engaging a cam slot in the adjustable member 67. A gauge block adjustably secured to the plate 120 carries spring presser feet having outwardly flared end portions 130, and U-shaped portions to accommodate the adjacent parts of the punching-plates 70. Grooves are provided in the plate 120 so that, in handling uppers in which lacing hooks have already been set, the endmost hook may be moved close to the punching tool 40. Eyclets, feeding.-The hopper 140 and raceways 144 are mounted on a bracket 146, oscillating on pointed screws 160, 161, which are threaded into eccentric bushings mounted in ears 147, 149 projecting from the framework. The bracket is oscillated by a cam lever, which co-operates with a cam on the main shaft 20, and is connected to a projecting arm 162 on the bracket through an adjustable link and universal joints. To suspend the supply of eyelets, the eccentric bushings arc turned to move the bracket bodily and carry the raceways to an inoperative position by pulling a spring-controlled rod 164, which is attached to a lug on one of a pair of arms 152, 154 extending from the bushings and connected together.