Patent GB-285134-A (GB)
Title: Improvements in or relating to machines for operating upon heels or similar objects
IPC: A43D33/00
Filed: 1926-11-10
Abstract: 285,134. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). Nov. 10, 1926. Breasting; heels, machines for. - Relates to machines for operating on heels or heel blanks which perform a plurality of operations on each work-piece, and consists in means for feeding the work pieces rectilinearly from a receiving position to each operating station in succession. A workpiece carrier may operate between the receiving position and the first station. and a.second carrier between the first and second stations. A pair of feed chains engage the work-piece by its opposite edges, each chain carrying a stop to ensure proper location of the work-piece at the operating station, the chains being approached and separated, respectively, to engage and deliver the work-piece. The machine is of the general type described in Specifications 22839/02 and 144,716. A frame 20 surrounds a rising and falling cross-head 30, Fig. 4, carrying the feed chains 50, which carry heels from a receiving position, first to a compressing station and then to a breasting station. The feed chains 50 are endless and are trained over sprockets at the front and rear of the machine, the front sprockets being driven alternately in opposite direction to give the chains their feeding and return movements. For this purpose gearwheels 58, Figs. 1 and 2, on the shafts 52 of the sprockets are driven by gear wheels 62 which mesh with each other. A sleeve 64 on one of these gearwheels is driven by bevel gearing from a quadrant 90 connected by a link 100 with a bracket fixed to the machine frame. As the feed mechanism is carried by the rising and falling cross-head, the link 100 causes the feed chains to reciprocate in timed relation to the movements of the cross-head. To prevent damage should a feedchain become jammed, and to provide lost motion between feed and return, the sleeve 64 is driven by a pin 74, Fig. 8, secured in a disc 72 and engaging an elongated recess in a flange on the sleeve. The disc 72 is connected to move with the bevel gear by a shear pin 82 sufficiently weak to be broken before damage can be done. To cause the feed chains to alternately grip and release the work at the appropriate ends of their travel, the chain sprockets are alternately approached and separated by a cam 140, Fig. 3, operating a lever 142 connected by a link 150 with a lever 152 carrying the bearing for one of the rear sprockets. A yielding link communicates a similar motion to the corresponding front sprocket. The sprockets carrying the other chain are actuated from this mechanism by toothed levers. The feed chains are backed by guide bars, and each comprises a long link 106 to which the two work engaging members are secured. These members are shaped each to engage a side and breast corner. The rear members 114, Fig. 10, are carried on arms 118, each pivoted to a link 106 and pressed toward the work by a spring 122. The fore members 108 are each detachably secured to the link by a pin 110 for which several holes 112 are provided. Each link 106 carries a stop 174 in the path of adjustable abutments to stop the chains at the extremes of their travel. To provide yield when the stops engage the abutments, the rear chain sprockets are mounted so that they can yield in a forward direction. At the compressing station a fixed heel seat forming die 22, Fig. 4, co-operates with breast and side dies carried by the crosshead 30. At the breasting station a fixed breasting knife 256 breasts the heel as the cross-head is raised. At this station the heel is fed on to a plate 124 behind which is a plate 200, Fig. 13, carrying adjustable gauges 192. These gauges are restrained by a lateral slot in a plate adjustable longitudinally of the machine by a thumb screw 214. Screws 204 in the gauges project through lateral slots in the middle plate and engage inclined grooves in the plate 200, so that the longitudinal adjustment produces corresponding lateral adjustment. The plate 200 is carried by a stem 202 frictionally held in a guide in the cross-head and provided with a lug 220 engaging fixed stops as the crosshead rises and falls to elevate it to operative position and depress it to allow a finished heel to be ejected over it, respectively. The heel is held in operative position by a plunger 228 normally depressed by a spring but provided with automatic lifting mechanism operating in timed relation to the rise and fall of the cross-head 30. This mechanism comprises a bell-crank lever 234 operated by fixed cam surfaces 244, 246 and a block 248 urged downwardly by a spring. The rod 228 is surrounded by an auxiliary presser 252 held in position by a friction. device 254, and abutting, at its upper end against a tube 260 also surrounding the rod 228 and abutting against a member 230 rising and falling with the cross-head 30. As the cross-head rises the cam roll 242 raises the block 248 with it until the roll is pushed to the left by the cam 246. Before the rod 228 is thus lifted from the blank, the latter engages the presser 252 which holds it during the breasting operation. The chip removed by the breasting knife falls into a shoot 258. During the fall of the cross-head the parts return to the position shown, the block 248 delaying the return of the rod 228 until a fresh blank has been fed into position. An automatic kicker 264 ejects the breasted blank into a shoot 262.