Patent GB-190926698-A (GB)
Title: Improvements in or relating to Assembling and Lasting and like Machines for use in the Manufacture of Boots and Shoes.
Inventor: BOULT ALFRED JULIUS
IPC: A43D21/12
Filed: 1909-11-17
Granted: 1911-01-17
Abstract: 26,698. Boult, A. J., [United Shoe Machinery Co.]. Nov. 17. Assembling parts; lasting.- In an assembling and lasting machine, the upper is held forwardly stressed upon a last while the heelseat portion of the shoe is lasted. The last and the s h o e assembling and upper-pulling mechanism are supported on a jack-post 5, Fig. 1, which can swing outwards to clear the last from the machine. The last is carried on a rotatable spindle 10 movable endways in the post 5. An arm 8 carrying the upper pulling-devices extends from the upper end of the last spindle, on which it may be adjusted by a pinion. shaft 11. The arm 8 carries an - horizontally movable block 15, Fig. 3, which on one side has an overhanging arm 16, beneath which the shoe is swung in position for the upper-pulling. A grippercarrier 22 is mounted on the block 15, and carries one rigid jaw 23, while another jaw 25 is mounted on a pivot 24 below the last. After the upper has been placed in position within the jaws, the gripper-operating member 26, pivoted at 20, is moved by a handle 28. The grippers are then closed, and moved backwards and upwards about the pivot 20 to stretch the upper. The jack is provided with a strong spring 3, Fig. 1, and, after the upper has been pulled towards the toe, the jack post is swung inwards within a heel band and against an adjustable stop 69, Fig. 2, the shoe being depressed to enable it to pass below a heel bottom rest 100 The lower end of the jack spindle is formed as a rack which engages a pinion 4<*>, Fig. 1, on the shaft 4 upon which the jack post is pivoted. This shaft is moved to lift up the jack by ratchet gear which, together with a similar gear 47 for swinging the jack post inwards, is operated through a yielding connexion by a segment 46. The heellasting devices into which the shoe is forced are shown in Figs. 8, 9, and 13, and comprise a number of separately-movable parallel extensible cords 50 arranged to extend about the heel from the shank on one side to the shank on the other. The end portions of the cords pass round the swivelled heads 51 of blocks 52 pivoted at 53 upon the front arms of angle levers 54, and are attached to separate springs 55, which are independently adjustable by screws 56. A lining of leather, rubber, felt, &c. is arranged over the cords to distribute the pressure when they are put under tension by the actuation of the levers 54. This is effected through connecting-rods 59 and a compensating- lever 60, which is mounted upon a toothed slide 61 engaged by a pinion turned by a toothed angle lever 62, Fig. 2, having a roll engaging with a cam-block 65 on a shaft 66. The slide 61 is also provided with a second rack engaging the segment 46 connected to the pawls for the jack. The back-stop 69 is forked to centre the shoe, and may be formed of a swivelled head having arms on which are swivelled two contact members to engage the shoe. The head may be swivelled vertically, and the contact members horizontally. The contact members may be used with or without the heel band; or the heel band alone may be used. Wiper plates 70, 71, 72, Figs. 8 and 13, to break down the counter and upper, embrace the entire heel and wipe inwards and forwards on the heel as they are closed. The wipers are actuated from the camblock 65, Fig. 2, which has a groove engaging a roll 76 on a slide 78, Fig. 13, which is connected by a compensating-lever 80 with bars 82, and also carries an arm 83 having a yielding connexion with the wiper plate 72. The arm 83 has a bevelled end face which abuts against a similar bevelled face on a displaceable member 84, which is pivoted to a slide 85, and by which the wiper 72 is actuated through a stud 840 and auxiliary slide 850, Fig. 2. The member 84 has a bevelled upper face upon which rests a bevelled plunger 87 carried in the slide 85 and pressed downwards by a spring 88. The spring maintains the members 83, 84 normally in the position shown in Fig. 13, but permits the member 84 to turn and the movement of the wiper to cease when the resistance to this movement overbalances the tension of the spring. The tacking is effected by the mechanisms described in Specification 28,474/10, each of which includes a tack block 120 carried by the slide 85 and having a depending stop 122 which meets the side of the last and positions the tack block. When this stop meets the last, the wiper movement stops and the member 84 is moved on its pivot. The member 84 has a cam-slot 842 into which the stud 840 of the auxiliary slide 850 projects, and which is so formed that, on rotative movement of the member 84, the slide 850 carrying the wiper is retracted to uncover the tacking line while still holding the stock. The tacks are then driven. The bars 82 have toothed engagement with angle levers 90, which have connexion with rack bars 93. These rack bars operate corresponding wiping and tacking devices for the sides of the heel. The wiper cam is formed to give a slow inward actuation of the wipers, and then quickly to retract them and advance them a second time in the same cycle of operations of the machine. The heel bottom rest 100, Fig. 2, is mounted in a slide in a block 102, and is pressed forwards by a spring 103. The block 102 slides vertically, being moved by a pinion 105, which is oscillated by a cam 110 on the cam block 65. This cam is formed for the bottom rest to be raised between the first and second advances of the wipers, so that the shoe can come up to the level of the wipers before their second advance. The cam also depresses the bottom rest after the tacks are driven, to free the shoe from the wipers. The drivers and tack pockets in the blocks 120 are inclined to drive the tacks towards the centre. A single driver rod 125 is provided for each tack block, and carries two drivers. The turning movement of the tack block takes place about the axis of the rod 125, which is connected by a slide block 123 and a ball joint to a driver plate 126, guided to move vertically by a post 127. The driver plate is the broadened end of a lever, pivoted at 128 upon a link 129, and having a depending hinged link 130, the foot of which rests upon a cam 132 on the shaft 66. The cam lifts the driver lever and the drivers against the tension of springs 134. Adjustable stops 136 limit the down-stroke of the drivers. If, after the completion of the wiping operation, the shoe is not lasted satisfactorily, the operator may suspend the tacking operation and permit the wiping operation to be repeated, as described in Specification 28,474/10.