Patent GB-122028-A (GB)
Title: Improvements in or relating to Machines for use in Turning Turnshoes.
IPC: A43D85/00
Filed: 1918-01-10
Abstract: 122,028. British United Shoe Machinery Co., (United Shoe Machinery Co.). Jan. 10, 1918. Turn-shoes, machines for.-In a machine for turning turn - shoes in which the heel part of a shoe is turned by manually - operated means and the forepart by poweroperated means, a number of different sized heel cups 38, Fig. 1, are detachably secured to a turret 36 adapted to be rotated about a hub formed upon the end of an arm 33 which is fulcrumed at 34 upon a head 31 of a standard 30, while a series of heel - turning members 50 are detachably mounted on a turret 51 journaled for rotation in a horizontal plane upon the head 31; locking-means are provided for holding each turret, after adjustment, in operative position, and a pair of springs connecting the turret 51 to its locking-plate provides for a lateral yield of the turning-members to prevent binding of the upper. The arm 33 is connected by a rod 65 to a treadle 66 which, when depressed, swings the turret 36 so as to cause the operative heel cup 38 to carry a shoe supported thereon towards the corresponding turning-member 50. This member first engages the heel seat and then enters the cup, turning the upper over the edge of the cup and an antifriction roll 63 which it carries. and leaving the shoe in the position shown in Fig. 20. The sole of the shoe is then broken across a turning-post. 75, Fig. 21, after which an upper spreader 77 is inserted in the forepart. This spreader comprises a pair of adjustable resilient fingers secured to a carrier 80, Figs. 1 and 21, which is detachably supported by a head 93 connected to a post 92 by a friction joint 94. The post 92 is supported by hinged swinging-arms 88, 91 pivoted on an arm 90 vertically adjustable in a yoke 97. A control lever 110, Fig. 1, is then swung to throw a main shaft 112 into operation, causing a toe member 125, Fig. 21, to be advanced into engagement with the shoe. The turning-post 75 is then automatically connected to the actuating- mechanism to advance with, but at one half the speed of, the toe member 125 to support the sole while the forepart is turned, the spreader 77 being gradually forced bpackwards by the advancing toe member. The turning-post 75 comprises a rod of rectangular cross-section loosely supported in a slot in a slide 114, Figs. 3 and 4, which is actuated with a slow advancing and a quick return movement through a connexion 116, Fig. 1, with a rocker arm 115 slotted to receive a block 118 on a crank 119 projecting from the shaft 112. The member 125 is slidingly supported in a slot in the upper side of the post 75 and carries a bracket 127, Figs. 3 and 4, adapted to be engaged by a transverse bar 130 pivoted at one end 132 to the slide 114 and supported at its other end by a spring plunger. The post 75, which passes between oppositely disposed faces 136 in an opening in the bar 130, remains at rest until the member 125 engages the shoe, when the resistance offered to the advance of the member causes the bar 130 to rock and grip the post 75, which is thereby connected to the advancing slide 114. The post 75 is provided with a raised flange 140, Fig. 8, formed with a rack 141 which meshes with and drives a pinion 143.mounted on a shaft 144; a second pinion 148, having twice as many teeth as the pinion 143, engages a rack 149 on the toe member 125. A one-revolution clutch arranged between the pinions 143, 148 is permitted to become operative as soon as the post 75 commences to advance, causing the pinions to be connected together, with the result that the member 125 is then advanced at twice the speed of the post 75, which, during the turning operation, rides upon a roll 165, Fig. 3, carried by an arm 166. To ensure that the toe member 125 engages the toe portion of the sole at the beginning of the turning operation, the outer end of the member is provided with a finger 170, Fig. 5, having an undercut face 171 adapted to project over the toe portion of the shoe; the finger is pivoted to a carrier 172 detachably secured to the end of. the member 125, and is normally held in a slightly raised position by a spring 175. A curved plate 206, Fig. 20, secured to the heel cup, engages the shank of the sole and supports the sole during the latter portion of the turning operation. After the forepart is turned, the slide 114 is moved back by the link 116 and arm 115, and frictionally carries the post 75 with it; the one-direction clutch between the pinions 143, 148 is immediately released, and an adjustable coiled spring 177, Fig. 8, unwinds to return the toe member 125 to its original position. To limit positively the point at which the post 75 is operatively connected with the member 125, a spring- pressed latch 195, Fig. 4, pivoted to the slide 114 is arranged to engage behind the free end of the bar 130; the latch prevents the locking movement of the bar 130 until it is tripped by the engagement of a roll 201 with an adjustable cam block 200. To control the starting and stopping of the machine, the main shaft 112, Fig. 14, carries a worm wheel 212 adapted to mesh with a worm 211 on a continuously-running shaft 210, which is mounted in a casing 216 pivoted at 217 to the main casing 215. The outer end of the casing 216 is connected to one arm 220 of a toggle, the other arm 218 of which is pivoted at 219 to the machine frame. A second arm 221 extending from the pivot 219 is connected by a spring 222 to the casing 215 and is provided with a plunger 223 having a shoulder 224 which is engaged by a latch rod 225 pivoted at 226 to the control lever 110, Fig. 1, and connected by a spring 227 to a lug 228 on the toggle arm 218. When the lever 110 is pulled forwards, the latch rod 225 is depressed and the toggle is straightened to raise the casing 216 and throw the shafts 210, 112 into gear, but if the lever is released, the spring 222 breaks the toggle and the machine stops. To relieve the operator from the control of the machine after the forepart of the shoe has been turned, a cam-actuated lever 233 is provided which maintains the toggle straightened during the return of the turning-devices but permits it to be broken as soon as these devices reach their initial positions. To clamp the heel seat of the sole firmly during the forepart turning operation, the arm 33, Fig. 1, is provided with a locking- arm 250 connected to a sliding rod 251 passing' loosely through an opening in one arm 252 of a bell-crank lever, the other arm 253 of which is formed with a cam face engaged by a roll 254. When the machine is started, the roll rides off the cam face, whereupon the bell-crank lever is rocked by a spring 256 to cause the arm 252 to bind on to the rod 251 and so to lock it against movement.