Patent GB-190620722-A (GB)
Title: Improvements in Heeling Machines for Boots and Shoes.
Inventor: JUSTICE PHILIP MIDDLETON
Filed: 1906-09-18
Granted: 1907-11-18
Abstract: 20,722. Justice, P. M., [Manufacturers' Machine Co.]. Sept. 18. Heels; nailing.- Relates to heeling- machines, and in particular to naili n g - mechanism therefor. The invention is described a s applied t o a machine of the "American" type, represented by the machine described in Specification No. 3314, A.D. 1891, in which there is an independent jacking or adjustment to meet the height of each particular heel. so that need for changing the last, say, in heeling welted work, is avoided. By the addition of automatic nail-loading mechanism, this machine is rendered wholly automatic, like the so-called " Mackay machine described in Specification No. 5405, A.D. 1902, or partly automatic, as may be desired. Fig. 4 shows the jacking mechanism. By operating the starting-handle, the skipperplate 9 is withdrawn from engagement with the dog roller 8, so permitting the pulley 4 to be clutched to the shaft 2, which, by the wheel 18, drives the pinion 20 on the shaft 25. The pinion 20, when geared to the shaft 25 by the clutch 26 operated by the treadle 29, rotates the jack-screw 42 by means of the bevel-gear 40,41, thus raising the jack-table 46 to jack the shoe. Means are provided for maintaining the jacked shoe in position, and for returning the shaft 25 to normal position to unjack the shoe. Preliminary adjust. ment of the jack can be made by means of gearing 60 &c. adapted to rotate the nut 59 on the jackscrew. The heel post 72 and toe-pad 80 of the jack are adjustable independently, to regulate the inclination of the shoe, and have also an adjustment common to both, to position the shoe with respect to the side-gripping jaws 86, which are adapted to prevent displacement of the heel counter during the heeling operation. When, in the jacking operation, the shoe is to be raised into actual contact with the heel above it, the clutch 26 slips when the shoe has reached the heel. Means are, however, provided which enable the shoe to be raised to a predetermined level short of the heel, and there brought to rest, the motion being limited by the adjustable stop mechanism 36. After the shoe is jacked, it is raised farther, to compress the heel, by means of the toggle links 48, 50, which are operated by the cam 57 through the pivoted yoke 54 and a rod connected to the spindle of the lower toggle member. The throw of the toggle can be varied, to suit either wooden or iron lasts &c., by means of the adjustable back-stop 67. When the jack has been raised by the toggle to compress the heel, the nails are driven in through the nail-block 108 by the driver 110, and the jack is then lowered, after which the empty heel holder is automatically swung to one side, and the top-lift holder brought into position, whereupon the jack is raised a second time to attach the top-lift. Fig. 8 shows the nail-loading mechanism. The nails are contained in bulk in the hopper 200, from which they are lifted by the rotating wheel 203 and deposited, in small quantities, on the inclined table 207 leading to the nail-raceway 228. This raceway consists, as shown in Fig. 8<a>, of two shafts, which are rotated in opposite directions, upwardly and outwardly, and are provided with a number of off-set enlargements 233, for the purpose of throwing off any wrongly-positioned nails. A vibrating cap or cover 237 is provided at the exit from the hopper, for the same purpose. The bearings of the shafts 228 are made adjustable, to accommodate nails of different sizes. Aided by the action of the shafts, the nails gravitate to the lower end of the raceway, where they are picked off singly from behind the spring retainer 245, Fig. 17, by the reciprocating feeder 246, which transfers them to the pockets 270 of the rotary loading-wheel 258, Figs. 17 and 21<a>. This wheel is rotated by a pawl and ratchet, and is engaged by a spring-controlled centring stop, the teeth in the ratchet &c. being spaced equally with pockets 270, but being one more in number, thus giving a final additional movement to the wheel for the purpose of discharging the nails. The nails are normally held by the lugs 278 of the pivoted plate 271, but during the final movement of the wheel the plate is turned on its pivot through a small distance, by the action of the fixed cam 277 on the lever 274, to release the nails, which then fall through the distributor 311, Fig. 8, to the carrier 316. The loading-shaft 223 of the nail-feeding mechanism and the main shaft 2 are preferably driven by different belts, as they are required to run at different speeds. The clutch 252 of the loading- shaft is normally engaged, and is automatically disengaged to stop the nail-feeder and loading- wheel. This mechanism is re-started by the operation of the starting-lever. The distributor, which, like the loading-wheel, is interchangeable, delivers the nails in heel formation to the carrier. It has at its lower end a supporting-plate or slide formed with holes corresponding in arrangement with the lower ends of the distributor tubes, but normally held out of alinement therewith by a spring. As the carrier is brought into position under the distributor, it engages the slide and brings the holes into alinement, so that the nails then fall into the carrier. A similar arrangement is employed to retain the nails in the tubes of the carrier, and to deliver them therefrom into the nail block 108, Fig. 4. Safety and locking arrangements are provided for the following purposes : (1) to prevent the machine from being started to depress the drivers while the nailcarrier is being moved towards or away from the nail block; (2) to ensure that one set of nails has been driven before another set can be loaded into the carrier ; (3) to prevent the loading-wheel from being set in operation except when the distributor has been emptied of its nails ; (4) to prevent the nail carrier from being moved into position to deliver its nails to the nail-block, until the top-lift carrier and spanker-plate have been removed from under the nail-block.