Patent GB-208593-A (GB)
Title: Improvements in or relating to machines for use in assembling parts of boots or shoes on their lasts
IPC: A43D21/12
Filed: 1922-09-20
Abstract: 208,593. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). Sept. 20, 1922. Assembling parts. - Relates to detail improvements in the type of machine described in Specification 110,923, and comprises a device movable relatively to the last support for positioning the last heightwise for the wiping and fastener-inserting operation, and fastener-inserting mechanism adapted to secure on the shoe bottom, at a position to one side of the extreme rear of the heel end, the flange of a counter. The last pin 16, Fig. 1, is adjustably supported by a tube 8 normally pressed upwards by a spring 10 and guided by a sleeve 24 mounted on trunnions 25 in a member 6 pivoted to the frame of the machine. A last positioning member 34 is adjustably secured to a bar 36 slotted at its lower end to engage one of the trunnions 25 and restrained by an inclined spring 37, Fig. 3. The operator positions a last with insole secured thereto and upper complete with counter and lining thereon, and swings the support rearwardly. During this swing the bar 36 is constrained by a link 40 to move over and then downwards on to the last, which is thus positioned in proper relation for the subsequent operations. The rearward swing of the member 6 also sets in motion mechanism which locks the last support and starts the machine. For this purpose a rod 76, Fig. 3, pivoted to the member 6 carries a collar engaging an arm 74 operating a latch 70 engaging a latch plate 369 secured to a clutch operating rod 58. At the same time the member 6 is locked bv the descent of a hook 80 which has a cam surface engaging a roll 94 on the support. The consequent pull on the trunnions 25, Fig. 1, tilts the member 24 so that a pawl carried thereon engages teeth 22 on the tube 8 and locks this against further depression. To allow the clutch rod 58 to rise and the machine to stop at the conclusion of a cycle. the rear end of the hook 80 operates a lever having a cam which disengages the latch 70. As the last approaches the limit of its rearward swing, the rear end of the upper engages V- shaped abutments 50, 52, Fig. 13, mounted on slides 51, 79. A lever 73 mounted on a fixed pivot 75 contacts at its upper end with the slide 79 and its lower end loosely engages the operating arms of pawls co-operating with teeth 61 on the lower slide which lock the lower abutment when both are firmly engaged by the shoe. A tack is then driven through the lower abutment 50. A gripper jaw 112, Fig. 6, pivoted at 114 and operated by a link 116 and a lever 118 pivoted at 120 to the wiper carrying slide 134, is shaped at its end to co-operate with the wiper 110. The lever 118 is actuated by a cam operated lever 124 to grip the upstanding rear end of the upper and pull this upwardly and forwardly. The wiper is then lowered and advanced, the jaw 112 being releaesd when the wiper has taken charge of the upper. A central heel seat tack is then driven through the wiper. Prior to the movement of the wiper, counter tackers having frames 140, 142, Fig. 2, are moved into positions over the counter flange at each side of the path of the wiper. The driver bars of these counter tackers are carried by the wiper slide, and the lower ends of their frames carry slots engaging cranks 156 on rock shafts operated by links actuated by the hook 80, so that on the descent of the hook the tackers descend and move rearwardly of the shoe, to tacking position. The counter tacks are driven at the same time as the central heel seat tack as also is the tack through the abutment 52. In a modification, instead of the counter tackers being moved forwardly and upwardly when work is being positioned or removed, the lower ends of their frames are guided by members moving with the wiper slide, so that the tackers move, from out of the way position, forward with the wiper as this advances, and are depressed and swung rearwardly to tacking position by connections from the gripper operating lever. Side clamps 190, Fig. 16, operated by connections from the hook 80 press the sides of the upper against the last, and may be used to automatically position the counter tackers in accordance with the width of the shoe by the provision of cams 248 adapted to engage rollers 246 on the tacker frames as these move forward. To prevent the tack to be driven through the upper abutment 52 from being displaced by the jolt caused by the driving of the lower tack, its driving cam is formed to produce, simultaneously with the driving of the lower tack, a partial movement of the driver bar 276 which pushes the tack into a restricted bore 282, Fig. 17. The cam operating the vertical drivers may be similarly , formed, to prevent upward movement of the tackers from displacing the tacks.