Patent GB-328321-A (GB)
Title: Improvements in or relating to fastener inserting machines suitable for use in the manufacture of boots or shoes
IPC: A43D75/00
Filed: 1929-01-26
Abstract: 328,321. British United Shoe Machinery Co., Ltd., and Roberts, W. T. B. Jan. 26, 1929. Loose-nailing. - A fastener-inserting mechanism, particularly for step-by-stsp lasting machines, comprises a series of fastener-supplying devices any one of which may be brought into action by the operator to supply a fastener of a length as nearly as possible suited to the portion of work being operated upon. As shown, a lasting machine of the general type shown in Specification 14453/97, [Class 17, Boots &c.], is provided with four tack-pots 3 containing respectively tacks 7/32, 9/32, 11/32 and # inches long. Each tack-pot is of the shape shown in Fig. 1, and is provided with a sliding door 17 by which the tacks may be dumped, and with a scoop 25 by which tacks are supplied to the raceways 23, of which one is provided for each tackpot. A single cover 13, hinged at 15, is provided for the four tack-pots. Each scoop is sectorshaped, operates through a slot in the front wall 9 of the respective tack-pot and is grooved at 29 for picking up the tacks. The four scoops are fixed on a rod 27 which is oscillated by links 33, 35 and a cam-lever 37 to raise the scoops inwardly and upwardly, so that tacks slide from the grooves 29 into the raceways 23. Grooved plough members 49 are held over the raceways by spring plungers 57 to prevent tacks from rising out of the raceways. Sliding pins 51 having grooved lower ends 53 prevent misplaced tacks being deposited on the raceway. Raceway covers 61, arranged as a unit, are pivoted about a tube 63 and are held to the raceways by spring-plungers 65. Each cover has a hollow longitudinal duct communicating with a port in the tube 63. The raceways lead to a tack-separator arrangement generally similar to that described in Specification 671/15, [Class 17 (i), Boots and shoes, Apparatus for making &c.], and their lower ends are positioned above tack tubes 71 which lead into four holes in a block 75. The four holes merge into a single orifice above the usual tack block 79 which carries the tack to driving position. As described in the last-mentioned Specification, four separators, one for each raceway, are mounted respectively on bars 81, 83, 85, 87, Fig. 2, and, according to the invention, any one bar can be reciprocated, at the will of the operator, to operate the corresponding separator. Another bar 89 carrying a notched plate 91 is reciprocated by any of the separator bars, this plate serving to keep a separated tack upright. A pneumatic tack-conveying apparatus generally similar to that described in Specification 670/15 is provided for blowing the separated tacks through the tubes 71. For procuring the delivery of a tack of the desired length, four plungers 101, 103, 105, 107 are arranged to slide in a casing 99 with their forward ends in a position convenient to the operator's hand. The separator bars 81, 83, 85, 87 are adapted to be engaged, to move them, by a finger 137 mounted on a sleeve 141 which is swung about a vertical rod 133 by a cam in the machine drive at the time a tack is to be separated. The end of the finger 137 is of such a size that it can only engage one separator rod at a time, and the finger is pivoted to the sleeve 141 at 139. It is turned about this pivot, to cause its end to engage a selected one of the separator rods upon its next actuation, by movement of the rod 133, the lower end of which is engaged by a lever 127 pivoted at 129. The lever 127 is rocked about its pivot to an extent dependent upon which of the plungers 101, 103, 105, 107 is pushed in by the operator. To this end, the plungers 101, 103, 105, are connected at their rear ends, to toggles 111, 113, 115 of different lengths. The toggles, when straightened by the pushing in of the plungers, depress a rod 123 which engages the lever 127. Consequently, the lever 127, and so, the finger 137, is moved to an extent decided by the operator when he pushes in a particular plunger. The plunger 107 is not provided with a toggle, and the finger 137 is normally in a position to engage the separator bar 81. The plungers are all inter-connected by levers within the casing 99, in such a manner that, when a particular plunger is forced in by the operator, any other plunger already in is automatically withdrawn to inoperative position. The machine is arranged to deliver a tack to the tack block just before the lasting operation in a particular machine cycle commences. By pushing in the appropriate plunger at any time, the operator can ensure that a tack of the desired length is provided for the next fastening operation.