Patent GB-235758-A (GB)
Title: Improvements in pegging machines for boots and shoes
IPC: A43D69/12
Filed: 1924-09-19
Abstract: 235,758. Coerper, W. Sept. 19, 1924. Pegging; work-supports. - The work-feeding mechanism of a pegging machine for boots is modified to render it suitable for use either with a horn or a last-holder. The main cam shaft 27 is mounted in a head b, Fig. 1, and may be operated by power or by a treadle 23 and fly-wheel 26. A last-holder 11 mounted by a ball-joint on a carrier 7 or a horn is mounted on a rod 1 normally raised against a peg-throat g by springs and arranged to be lowered with a long stroke by a treadle 6. The carrier 7 is bent so that the plane of the boot sole is not horizontal. The rod 1 slides in a sleeve 14 and is locked in raised position at the time a peg is driven by a clamping pad 18<1> operated by a bell-crank lever 16, rod 19, and cam 20. An arm 19<a> of the rod 19 operates at this time a lever 21 to increase the pressure of the work against the throat g. The shaft 27 carries at its forward end two pairs of cams 28, Figs. 4 and 5, of which the rear pair operates to lift a plunger 30 against a spring 31, twice for each rotation of the shaft, and the forward pair acts to brake the descent of the plunger under the influence of the spring. A pivoted frame 33, Fig. 5, carries two sliding carriages 35 supporting respectively an awl 37 and a driver 36. The frame 33 is rocked by a rack-bar 38 and cam 42 to lock alternately the awl and the driver to the plunger 30, so that at the first descent of the plunger the work is perforated, and at the second descent a peg is driven. The peg strip is fed intermittently to the throat g by a milled wheel 48 and a co-operating roll through a curved guideway having a removable cover plate. The wheel 48 is rotated by a pawl 55 engaging a pinion 52 and operated by a lever 56 and cam 57. The pegs are out off by a knife 66 carried by a lever 68 operated by a groove in the cam disc 42. The work feed mechanism includes a feed foot 72, Fig. 17, which embraces the throat g and is carried by a vertically movable ram 75 which is guided in the head b and is moved downwardly to engage the work by a cam 81 against springs 80. The feed foot 72 is guided by screws 86 and slots 85 to slide laterally of the ram 75 in order to feed the work forward. This lateral motion is imparted to the feed foot by a swinging arm 89 on a sleeve 91 mounted on a pin 90, Fig. 4. The sleeve 91 is rocked to feed the work by a lever 92 and a cam 94 operating against a spring 93. The extent of feed is adjusted by a screw 110. If two rows of pegs are to be inserted the work must be displaced transversely of the line of feed after each feed movement in the line of feed. This transverse displacement is effected by moving the sleeve 91 axially of the pin 90 by means of an eccentric 99 on a sleeve 96 carrying a star wheel 97 which is intermittently rotated by a cam 98. The cam 98 is loose on the shaft 27 and may be clutched to it when two-row pegging is desired by pins 103 on a collar 102 slidable on the shaft 27 by means of a hand lever 104. The arm 89 has a cam surface spring held against a part of the feed foot to eliminate lost motion or play between the parts. In operation the work is raised against the throat g by depressing the treadle 6 and the shaft 27 is operated. The awl and driver are successively operated by the cams 38 and plunger 30, at which time the rod 1 is locked by the cam 20. The feed foot is then lowered by the cam 81 and moved laterally by the cam 94. If two-row pegging is desired the lever 104 is moved to clutch the cam 98 to the shaft 27.