Patent GB-1040882-A (GB)
Title: Improvements in or relating to shoe upper conforming machines
Inventor: CHOICE FRANK COLEMAN
IPC: A43D21/12
Filed: 1962-03-10
Abstract: 1,040,882. Shoe lasting machines. BRITISH UNITED SHOE MACHINERY CO. Ltd. March 7, 1963 [March 10, 1962], No. 9295/62. Heading A3B. A shoe upper conforming machine has a work support presenting a shoe in an operative position in the machine with respect to a wiping arrangement comprising a pair of heel-end wipers, and a pair of waist-wiping devices which are adjusted automatically to take up curvature to suit the heightwise curvature of the waist region of the shoe. The waist wiping arrangement is provided as an extension of the heel seat wiper and pivotally connected thereto, the machine having means for automatically varying the angular relationship between the wiping arrangement and the heel seat wiper. The heel seat wipers 4 (Fig. 1) adjustably mounted in wiper carrying plates 6 are similar to the arrangement disclosed in Specification 391,451. The wiping device 10 (Figs. 1 and 2) comprises a bracket 12 carried on the lower end portion of pin 14 projecting upwardly through bracket 16 fixed to a forward heightwise extending face of heel wiper 4 and receiving one arm of three armed member 18, a second arm of which is secured to a forward end portion of bracket 12, so that member 18 and bracket 12 may swing as a unit about pin 14. The angular relationship between the wiping device and heel seat wipers is automatically varied by means of two stationary cam tracks 22 connected to device 10 through the third arm of member 18 which carries cam follower roll 20. Disposed in a clearance provided by bracket 12 is the wiping arrangement comprising a plurality of shaped wiping fingers 24 connecteed together for movement heightwise of the shoe and relative longitudinal movement. Ball ends 26 of fingers 24 are received in channel 30 in finger carrier 32 connected to bracket 12 through pivot pin 34 so that the finger carrier 32 may swing in a heightwise direction about pin 34 on bracket 12. Alternate fingers 24 (Fig. 3) have pins 42 extending therethrough, the rounded ends of which engage in scooped grooves 36 of adjacent fingers. The outside edges of the end fingers have grooves 36 which engage respectively a ball 38 contained in bracket 12 and a screw 44, contained in an arm 46 the other end of which carries a spring plunger 50 which maintains the fingers in channel 30. The disposition of the wiping surfaces 28 of fingers 26 is determined by the disposition of a mechanical linkage (constituting a curvature controlling arrangement) provided by arms 58 and 62 (Fig. 2) which through stems 54 extending upwardly from the second and fourth fingers determines the position of said fingers, the other fingers being accommodated accordingly through their articular connections. Associated with each carrier 32 is a universally connected link 68 extending upwardly for connection with a feeler, provided by the setting means arranged to engage the bottom of the insole of the shoe operated on in its waist region as the shoe is presented in an operative position and this determines the setting of each of the wiping arrangements. The feeler comprises an elevating arm 70 (Fig. 8) for the carrier 32 carrying a pivotally mounted wheel in its bifurcated lower portion. As the shoe is moved rearwardly towards operative position the elevating arm 70 is cammed upwardly by the slope in the waist region of the shoe the peripheral edge of the wheel 80 riding up the slope in engagement with the insole, and through links 68 the heightwise disposition of the wiping fingers is determined accordingly. The jack 2 (Fig. 5) is swung rearwardly to carry the shoe against the heel band and the post 86 is raised to force the shoe against a holddown prior to the actuating of the machine clutch which starts a cycle of operations. Sleeve 90, supporting last pin 96 at its upper end, is slidably mounted in a body portion 88 of the jack, and is locked to post 86 by means of rack teeth 92 engaging with a toothed member 94 in sleeve 90 for heightwise movement therewith. In order that sleeve 90 may be telescoped on post 86 to accommodate extreme heights of heel end portions of the last, toothed member 94 is made retractable (means disclosed) to disengage with rack teeth 92. The clamping arrangement is organised to clamp opposite side portions of the upper to the last in the waist region in the vicinity of its heel stiffener comers prior to movement of the shoe from the loading position. A pin 116 extends laterally through the slide 114 which embraces slideway 112 fixed on block 98 mounted in a curved guideway 100 in the upper face of sleeve 90. Pin 116 extends across bifurcations in the support 118 and supports in each bifurcation a roll 120 and the upper end of an arm of a U-shaped yoke 122 pivotally mounted on and depending from pin 116. Rod 124 (Fig. 11) extends downwardly from the base of the yoke through a tube 126 which fits slidingly in a trunnion pivotally mounted in a bracket 132 secured on a fixed part of the machine. Spring 134 which surrounds rod 124 urges the yoke upwardly to determine the normal heightwise position of the clamp support 118 and slide 114. A pair of bell crank levers 138 having arms which carry work clamps 140, are mounted for swinging movement by pins 137 in a clamp support 118, and have a further arm formed with a lug 142 engaged in a recess in a head 144 fixed on the upper end of a piston rod 146 connected to a piston 148 slidably mounted in cylinder 150 fixed to clamp support 118. When oil under pressure is admitted to cylinder 150 above piston 148 the piston descends and causes the work clamps 140 to swing inwardly to clamp the shoe on the jack 2 against its last on either side thereof in the region of the heel stiffener corners. Means to engage the insole and automatically position the clamping arrangement relatively thereto heightwise of the last comprise an upwardly extending arm 156 pivotally mounted for swinging movement by means of a pin 154 normally supported in an upright position against a fixed part of the machine by a tension spring 158. Pivotally connected to the upper end of arm 156 is a cranked gauge arm 160 which carries by means of a pivot pin in its bifurcated end portion a gauge 162 which forms a bridge laterally spanning the shoe. Mounted centrally of the bridge is a gauge button 168 and at each end of the arch gauge rolls 170. When the shoe is in inverted position on last pin 96 the gauge 162 is brought down by a manually operated lever for its rolls 170 to engage on upper faces 171 of the oppositely disposed clamps 140, the slide 114 moving downwardly on slideway 112 against the resistance of a spring. Means (disclosed) connecting clamp support 118 and arm 156 are provided to adjust clamps 140 if desired lengthwise of the last to clamp the work at positions forwardly of the position relatively to the machine in which they would normally clamp the work. Further actuation of the lever (Fig. 10 not shown) causes the clamps to move towards each other and clamp the work under clamping pressure. Continued pulling of the lever causs it to swing about the axis of its pivot pin (Fig. 10 not shown) against the action of a spring to lift a rod which extends downwardly through a clearance in a forwardly extending arm of a three armed pivotally mounted lever 188 (Fig. 5) the upward arm of which is connected by link 190 with the stem 192 of a spool valve contained in housing 194 (Fig. 1). Upward lifting of rod (Fig. 10 not shown) causes adjustable nut 196 to engage the forward arm of lever 188 and urge it in a direction to cause the upwardly extending arm to draw the valve stem 192_rearwardly. Oil under pressure is directed via a pipeline into the top of cylinder 150 to operate the clamping means. Release of lever 172 causes gauge 162 to move to an "out of the way" position under the influence of a counterweight. To prevent slide 114 being spring-urged up the slideway to raise the clamps when they disengage from under gauge rolls 170 the slideway is provided with a series of ratchet teeth 200 arranged to be engaged by one of a pair of pawls 202 pivotally mounted in slide 114. The raised piston head 144 urges bell crank lever 204 in a direction for an arm of the bell crank lever to urge pivotally connected finger 208 (the rear end of which rests in a clearance in pivot pin 116 and the bifurcated forward portion straddles the piston rod 146) rearwardly through support 118 and slide 114 so that the end of the finger is pressed against pawls 202 to hold them disengaged with ratchet teeth 200 against spring resistance. On descent of piston 148 and disengagement of head 144 with bell-crank lever 204 to bring about clamping movement pawls 202 are spring urged to engage ratchet teeth 200, finger 208 no longer offering resistance to such movement. In the loading position block 98 is held against rocking movement in guideway 100 supporting the clamping means in a stable manner, while a shoe is clamped by the clamps 140. When jack 2 occupies the loading position chain 212 (connected at its forward end to a bar 214 fixed to the lever portion of the slideway and at the opposite end to a fixed anchorage in the machine) is taut and urges slideway 112 to move the block rearwardly in the guideway 100 to a position determined by engagement of the bar 214 against sleeve 90. On swinging the jack to its operative position chains 174 and 212 slacken, slackening of chain 212 allowing block 98 to move in the guideway 100 to accommodate the shoe supported on the last pin 96 against a hold down (Fig. 10 not shown). In moving rearwardly the shoe insole is engaged against the wheel 80 (Fig. 8) which rides up the slope of the shoe insole in the waist region to elevate the arm 70 and links 68 in order to set each wiping arrangement provided in the wiping devices 10. As the elevating arm 70 is raised by the shoe being moved into operative position cam rolls 74 (Fig. 8) rising up cam slots 76 in