Patent GB-191325492-A (GB)
Title: Improvements in or relating to Machines for Lasting Boots and Shoes.
IPC: A43D21/16
Filed: 1913-11-07
Granted: 1914-12-07
Abstract: 25,492. British United Shoe Machinery Co., (United Shoe Machinery Co.]. Nov. 7. Lasting.-In an end-lasting machine, particularly for the toes of shoes, power-driven means are provided to clamp the shoe and move it vertically in relation to wipers and grippers, while other separately-controlled power-driven means close the wipers and cause the shoe to be advanced under the wipers ; the machine may also be arranged so that the wiped-over shoe is raised and compressed against the bottom face of the wipers, and, when used on the toe portion, it may be fitted with a binder-mechanism. The shoe-handling mechanism comprises a rectangular frame, formed of a crosshead 4, Figs. 1 and 2, side bars 5, and a foot-piece 6, in which is mounted an adjustable swinging lastdepressor 3 carrying a shaped and yielding footpiece 9, and an adjustable toe post 20 carrying a head 16 fitted with a sector-shaped holder 15 for a rubber pad 2. A rod 22 extends through the toe post, and has pivoted to it the upper members of toggles 23, the lower members of which are arms 24 of angle-levers 25 pivoted on a rod 21 in the foot-piece 6 ; this foot-piece also comprises a yoke 19, from which a curved arm 17 extends to a bearing on a shaft 32. The normal vertical position of the shoe-handling frame is determined by connexions 45, 46 with a sleeve 46<a> on a rod 47, this sleeve having an arm 49 which is engaged by an edge-face cam 48 of a cam-block 30 mounted on a shaft 32. The block 30 is formed with gear teeth by which it is driven by a pinion 35 of half its peripheral size, which is adapted to be connected by a spring clutch pin 36 to a collar 38 on the driving- shaft 40 on the depression of a treadle 44. The toe post is raised to clamp the shoe through the angle-levers 25 and links 26 by a lever 27, which is mounted on a rod 137 at the back of the machine and actuated by a cam 28 in the inner face of the block 30. After the upper has been seized by the grippers, as described below, the shoe-handling frame as a whole is moved downwards by the engagement of the angle-levers 25 with the arm 17 until the plane of the shoe bottom is below that of the wipers. This occurs during one-half a rotation of the cam-block, which is then automatically brought to rest, and the shoe-handling frame is then moved under the wipers by link connexions 55, 56, 62, 67<a> between the rod 22 and a track 58 in the side of a cam-block 70, which is driven by separately-controlled power-driven mechanism ; this block is also formed with an edge-face cam 68 which actuates an arm 69 depending from the sleeve 46<a> so that, after the upper has been properly wiped in, the shoe-handling frame will be elevated to compress the wiped-in edge against the bottom of the wipers. The machine is fitted with two pairs of spring-actuated grippers arranged on either side of the extreme toe end of the shoe ; each gripper comprises a pair of pivoted jaws 110, Fig. 5, carried by a foot-piece 106 on a stem 105, which can turn freely in a guide 102 so that the jaws can adjust themselves to the direction of strain. The guide 102 is pivoted on a carrier 100, in which is mounted a slide 122, which rests upon the broad head of a plunger 125, and is adapted to engage a shouldered block 120 embracing the jaw-closing rod 115 of the grippers ; the lower ends of the plungers 125 rest on arms 124 of a rocking-sleeve on a rod 128, Fig. 1, this sleeve being actuated through a rod 129 and lever 130 from the cam-block 30. After the shoe has been clamped, the grippers are closed on to the stock and raised slightly to straighten the upper, after which the shoe-handling frame is moved downwards and the upper is stretched. The grippers remain locked until the wipers have started to close, whereupon they are released by latch mechanism operated from the cam-block 70. The wipers comprise plates 150, Fig. 7, pivotally mounted in carriers 154, which are connected by links to a cross-head 156 adjustably threaded in a sleeve 158 mounted in a sliding-block 160; this block is actuated through an arm 162 of a sleeve 60, mounted on a rod 67, the other arm 67<a> of the sleeve being actuated from the cam-block 70, as described above. These connexions close the wipers without advancing them, and in order that the grippers shall close in on the shoe with this movement of the wipers, the bases 151, Fig. 5, of the grippers are connected by bolts 166 to the wiper carriers 154. To adjust the wipers, the sleeve 158 is adapted to be rotated by a pinion 170, operated from a hand-wheel 175 at the front of the machine, but in addition to this hand adjustment, the wipers are partly closed automatically during the jacking- operation by the engagement with an extension of the pinion 170 of a rack 173, Fig. 1, actuated through an arm on the sleeve 60 ; the rack is automatically disengaged from the pinion at the end of its downward stroke. The cam-block 70 is driven from the shaft 40 through a clutch connexion with the collar 38 manipulated from a treadle 144, similar to the connexions operated from the treadle 44, and during the second half of its rotation, it is arranged to trip the clutch of the cam-block 30 to cause this to complete its rotation, to return the parts controlled from this block to their original positions. The wipers 150, Fig. 7, are grooved to receive a binder, which is drawn through a friction guide 180 and secured in a clamp 182. A roll 185 carried by a spring-controlled curved arm 186 pivoted to a second curved and pivoted arm 188 is adapted to be moved by a handle 190 to bend and press the wire into the grooves in the wiper. The machine may be fitted with a support for the heel end of the last comprising a pin 197, Fig. 1, secured in a block 196 adjustably carried by the upper end of a bar 194, which is pivoted at 195 to the toe post approximately under the joint of the last, or the point of intersection of the median lines of the fore and heel parts of a crooked last.