Patent GB-484484-A (GB)
Title: Improvements in or relating to methods of and means for assembling parts of shoes
IPC: A43D11/00
Filed: 1936-11-05
Abstract: 484,484. Boot - making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation) Nov. 5, 1936, No. 30101. [Classes 17 (i) and 89 (iii)] [Also in Group XXIV] A machine for assembling a counter and a lined upper comprises means for supporting a loose counter and for positioning the upper in correct relation thereto. In the use of the machine, a cemented counter is mounted on members of the machine which support it by its flange, and a lined upper is threaded over the counter, the toe of the upper then being held by toe grippers. The main shaft of the machine is then started, and rotates through about onefifth of its cycle before stopping. During this period, rear and side gripper-wipers move in to grip the lasting margin of the heel end of the upper, lining grippers are operated to grip the lining and impart tension thereto, and a form or last is introduced into the upper and engaged with mechanism for moving the last. The main shaft is then again started, and completes its cycle. During this period, a slight downward pressure is first imparted to the last, the lining grippers and counter wing supports are moved out of the way, and a heel pad is moved up to and closed around the heel end of the upper. The side wipers are moved in to support the counter flange, the toe gripper is moved to stretch the upper, and the last is forced downwardly and rearwardly to wipe and smooth the lining. The end and side wipers complete their wiping movements to lay the lasting margin of the upper over the heel end of an insole secured to the last, and tacks are driven through the wipers to secure said margin. The main shaft 72 is driven by worm gearing 74, 76 from a shaft 62, Fig. 4, under control of a clutch 1152. In stopping position, a cam hump 1168 has rocked a bell-crank lever 1172 to disengage the clutch through arms 1180, 1182. When the starting treadle 68 is depressed, a link 1190 is moved to disengage the arm 1180 from the lever 1172, so that the clutch engages. An abutment 1198 then disengages the link 1190 from the arm 1180, so that the latter re-engages with the lever 1172 and is moved to disengage the clutch by a second cam hump 1168 after a partial revolution of the shaft 72. The latter completes one revolution when the treadle 68 is again depressed. For supporting a loose counter, the machine is provided with wing and rear supports 80, 82, 84, Fig. 3. The rear support, Fig. 33, has a slot 90 to receive the flange of the counter, wings 92 on which the upper rests by its lower edge to locate it with respect to the counter, and a serrated rear face which co-operates with the forward face 258 of an end wiper 98 to form a rear gripper. The support is carried by arms 87, 88 pivoted to a slide 94. The latter is moved forwardly by a cam lever 120, after the heel pad has closed on the upper, to disengage the support from the counter, and such movement tilts the support downwardly, by engagement of a surface 106 with an adjustable pin 108, to leave room for the final advance of the wiper 98. The wing supports 80, 82 are mounted for adjustment, laterally of the shoe, on heads 140, 142, Fig. 3, which are adjustable lengthwise of the shoe. Each wing support is formed with slot for the counter flange and a serrated rear surface for co-operation with a side wiper 292, Fig. 11, and is carried by arms 160 pivoted to a slide 164 and held upwardly by a spring 172. The wing supports are disengaged from the counter in unison by connections from a rock-shaft 198, Fig. 3, actuated by a cam on the main shaft. These connections include resiliently-acting rods 204, a rock-shaft 210, bevel-gearing 222, 224, and rods 220 linked to the slides 164. During disengagement, they are swung downwardly by surfaces 174 engaging fixed pins. The end and side wipers are moved, in the first part of the machine cycle, to co-operate with the counter supports in gripping the upper, and in the second part, to wipe the upper margin over the insole. The end wiper 98 is operated from a cam on the main shaft through a lever 276 and link 288, Fig. 1, its stroke being limited by stops to locate it accurately in tack-receiving position. The side wipers 292 are mounted in the heads 140, 142 for adjustment laterally of the shoe, and are operated yieldingly by a cam on the main shaft acting through rods 320, Fig. 3, a rock-shaft 328, bevel gearing 330, 332 and rods 334 connected by links 338, 340 to the outer ends of the wipers. Each side wiper is associated with a slide 372, Fig. 11, for supplying it with two tacks. The slide supports tack tubes 1092 and moves forwardly, with the wiper, under pressure of a spring 392. As the wiper retracts, a shoulder 384 on it moves the slide rearwardly. The tack pockets in the wiper come into alignment with the tack tubes, to receive tacks therefrom, just before the wiper reaches the limit of its retractive movement. The toe gripper 78, Fig. 14, is carried by a plate 422 so as to be adjustable vertically, widthwise, and lengthwise, of the shoe. Stops facilitate a rapid adjustment for right and left shoes. The lower jaw 402 is supported by a spring 408 and the upper jaw 404 has a downwardlyextending shank 420 pivoted to one link of a toggle 424, 426 connected by an adjustable rod 458 to a treadle 430. The treadle linkage includes a lost-motion connection 464 such that the gripper is latched when in gripping position. This latch may be released manually to permit adjustment of the gripper on the work, and is released automatically near the end of the second part of the machine cycle to release the gripper. Before the gripper closes on the upper, it is moved rearwardly towards the upper by depression of the treadle 430 acting through a rod 494, a bell-crank lever 506, and a link 522 connected to the gripper-supporting head. During this movement, a spring is compressed. When the gripper has closed on the upper, a trip mechanism 502, 504, 516 releases the link 522 so that the spring returns the gripper forwardly to impart a light tension to the upper. In the second part of the machine cycle, after a last has been positioned in the upper, a heavy, adjustable, pull is imparted to the upper by a cam on the main shaft acting through a pawl which engages a rack 572 on a slide bar 446 which carries the gripper head. The lining grippers, Fig. 24, comprise pairs of jaws 586, 592 pivoted on a plate 590 and held open by springs 596. The plate is carried by a rod 616 which is connected by a link 632 to a treadle 584, Fig. 1, and is surrounded, at its upper end, by a sleeve 614 held upwardly by a spring 644. The rod 616 is guided in a support 618 mounted for swinging movement lengthwise of the shoe. When the treadle 584 is depressed between the first and second parts of the machine cycle, extensions 607 of the inner gripper jaws 592 engage the upper end of the sleeve 614, closing the grippers on the lining. Further depression of the treadle compresses the spring 644 and imparts heightwise tension to the lining. The sleeve 614 is locked in gripperclosing position by a latch 660, and the rod 616 is locked in lowered position by a latch 648, Fig. 1. At the beginning of the second part of the machine cycle, the latch 648 is disengaged by a cam on the main shaft acting through links 676, 684. This allows the rod 616 to rise just enough to open the lining grippers. Continued movement of the link 684 rocks the support 618 forwardly to remove the lining grippers from the path of movement of the counter supports. At the end of the machine cycle, the support 618 is returned to starting position by a spring 694, and the latch 660 is tripped to allow return of the sleeve 614. The heel end of a last is supported by a heel rest 706, Fig. 25, which is adjustable heightwise of the shoe and is supported by a spring. The rest is lowered, by connections to the treadle 584, to allow a last to be inserted into the shoe, heel end first, between the first and second parts of the machine cycle. When the last is positioned, the rest is released, and a last pin 738 is positioned in the last hole 742 by manual depression of the stem 740 of the pin. The stem is slidable in a head 756, and is locked in lowered position by a latch 764. The head 756 is carried by a plate 757 which is slidable in a head 778 swivelled on a vertical rod 776. The head 778 normally is turned by a spring 796 into a position of angular displacement, which gives an operator an unobstructed view of the shoe, and the plate 757 is held at the limit of its rearward displacement by a spring 788. Stops limit the swivelling of the head 778 and facilitate the positioning of the pin 738 over the last. During the second part of the machine cycle, power means act to depress the last slightly while the heel pad closes on the upper, and then to depress the last further and move it rearwardly to wipe the lining into smooth contact with the counter. The lower end of the rod 776 is linked to a cam-operated lever 820, Fig. 1, movement of which acts to force the last downwardly into the shoe. Depression of the head 780 acts to rock a pawl 846, Fig. 25, into engagement with rack teeth 848 on the sliding plate 757. Continued depression of the head 780 compresses a spring 856 to rock a bell-crank lever 844 which carries the pawl, so that the latter forces the plate 757 rearwardly, and so forces the last rearwardly in the shoe. When the final downward pressure on the last occurs, the wipers 98 and 292 are at the limit of their advance and provide a support against which the pressure is exerted. Before the final downward pressure, the members 92 which support the upper are swung clear, and the heel pad 864 is moved in to engage and embrace the heel end of the upper. The heel pad, Fig. 34, is formed of soft, resilient, material and has an inner face 866 conforming to the heel end of the shoe and plane outer faces formed with grooves 868 to increase its resilience. I