Patent GB-191011629-A (GB)
Title: Improvements in or relating to Heeling Machines.
Inventor: PLANT THOMAS GUSTAVE
IPC: A43D79/00
Filed: 1910-05-10
Granted: 1911-07-10
Abstract: 11,629. Plant, T. G. May 10. Heels, machines for. -A heeling-machine in which the heel-attaching operation is prevented under every condition of improper measuring has a shoesupport mounted on a slide 21, Fig. 11, moving in guides on the machine table 3. A swing- ing table 22 has angular movement in guides 23 and a turning circle 24 on the slide 21. The table 22 carries a jack slide 25 and a second slide 26 carrying the clamping-devices for the shoe. The jack is mounted on a spindle 27, which moves in a sleeve 28 rising from the jack slide. The slide 26 carries a vertical slide 30 forming a heel backstop 31 and having mounted on it counter clamps 32, which, when freed in the operation of the machine, are pressed d toward one another by a spring 38, which bears against arms extending from rock-shafts on which the clamps are mounted. The slide 32 also carries the pivot for a pair of forepart gauge arms 42 provided with adjustable gauges 44 and connected at their rear ends by a spring 46. One or the other of the gauges is used according as the shoe operated upon is a right or left shoe. The shoe is placed in position while the jack slide is at the front of the machine, in which position it is held by a pin on a hand-operated lever. The action of gripping the jack releases the pin, and the jack is moved backwards by a spring 52. As the jack moves backwards, it acts upon a trip lever 65, which lifts a holding pawl from a rack freeing the slide 30, which is held in a depressed position while the shoe is fitted on the jack, and allows the slide to rise to operative position under the action of a spring 60. The height to which the slide rises is controlled by a stop 74 on the measuring mechanism. After the shoe has been moved backwards under the heel-nailing devices, the forepart gauge, the counter clamps, and the swinging table 22 are operated to move the shoe to its selected position with reference to the heel to be attached, by depressing one of two treadles according as the shoe is a right or left one. The treadles operate trip levers 94 carrying slotted links 99, in which pins at the extremities of links 86 mounted on the arms of a rock-shaft 84, Figs. 2 and 9, slide. The links 86 are provided with hooked portions 87, which can engage a rod 88 on a lever 89 drawn down by a spring 91. As the one or the other link is freed from the rod 88 by depressing its treadle, the lever 89 is moved down by the spring, and the rock-shaft 84 swung round its connection to the lever 89 by the other link. The rock-shaft is connected through rack-andpinion gear to upright shafts 110, Fig. 9, which carry cams 112 operating the forepart gauge arms 42. The movement of the cams 112 also frees the counter clamps, allowing them to close on the heel of the shoe. The rock-shaft 84 is connected through bevel-gearing 101, 102, to a vertical shaft 103 carrying at its upper end an eccentric and an adjustably mounted pin 104. This pin passes into a sliding block in the table 22, Fig. 11, and thus causes the table to swing on operation of one of the levers. The position of the shoe is adjusted so as to give a right or left or square appearance to the heel, by moving the slide 21 in the table of the machine by a hand - lever. A removable pin locks the table in such adjusted position. Means are also provided for adjusting the slide 26 carrying the clamping-devices, after the shoe has been gripped. Before the cross - head 5 descends in the nailing operation, the heel is measured. The jack spindle 27 at its lower end moves in guides 123, Fig. 5, in a block 73, which is capable of vertical movement in guides 133. The block 73 is secured to the upper end of a measuring spindle formed of two pairs of right and left handed screws 126, 127 and 129, 130, each pair being connected by a toothed sleeve in the form of an elongated pinion. By turning the upper sleeve 128 by means of a hand-wheel 134, the jack can be raised by hand to the desired height with reference to the heel supported in the nail block in the cross-head. The stop 74, controlling the position of the slide carrying the forepart gauges and the counterclamps, is also raised at the same time. The lower sleeve 131 is operated by a rack 137, Fig. 2, which meshes with the teeth on its surface, the rack being operated by a lever 138 carrying a roll 141, which is in the path of projections 142 on the treadle levers. The operation of depressing the treadle thus causes the jack to be raised to its final position against the heel in the nail block. A trip gear holds the lever 138 locked against the pressure of a spring 159 until one of the treadles has been depressed. The sleeve 131 is held locked in the position to which it is moved by the operating- lever 138, by a number of spring pins which engage the teeth of the rack 137. These pins are released in the operation of the machine by a lever 156 operated by a cam on a countershaft. At the conclusion of the operation of the machine, after the locking pins have been retracted by their operating-lever, the lever 138 is positively moved to set position again, by a cam 166 on the driving-shaft 8, the cam striking a roll 165 on a lever connected by a link 161 to the lever 138. The screw 130 at the lower end of the measuring-spindle is mounted in a support 197 slotted to embrace the countershaft 11 operating the cross-head. The support 197 is locked against downward movement during the action of the measuring-rack by a bell-crank lever 198 carrying a roll 200 adapted to engage below a lug 201 on the frame. The upper arm of the lever is engaged by a cam 204 upon a sleeve on the driving-shaft 8. After the measuring operation and before the cross-head is depressed, the cam operates to move the roll 200 from below the lug. The cross-head then forces the jack and the measuring - mechanism downwards against the pressure of a strong leaf spring 210. A collared sleeve 211 is screwed on the lower end of the support 197, and is adjustable to vary the distance of the collar from an abutment 214, thus varying the compression to which the heel is subjected. The jack slide is also locked in position during the heel compressing and attaching operations by a clamp on the end of a rod 193, which passes through the end of a lever 192 pivoted at 188 and having at its other end a roll 190 riding on a cam on the driving-shaft 8. A spring 194 is interposed between arms 192 and adjusting-nuts 195, thus giving a yielding action on the rod 193. A Horton clutch on the driving-shaft 8 is operated by the rocking of a shaft 172, Fig. 2, which carries an upwardly-projecting arm 173 pivoted at 174 to the lower end of a knee-lever 175, pivoted at 176. Pressure on the knee - lever thus rocks the shaft 172 and throws in the clutch. To prevent the operation of the machine should the heel - measuring device measure too little or too much, the arm 173 is slotted and has on one side of the slot two stop shoulders 178, 179. A lever 181 pivoted at the back of the frame of the machine extends forward through the slot, and is turned over at the end to form a stop 182. A roll 183 on the actuating - lever 138 for the measuring - mechanism engages the lever 181 as the heel is measured, and, if the measurement is correct, lifts it so that the stop 182 may pass between the shoulders 178, 179 when the knee-lever is pressed. If the lever 138 moves too little or too much, the stop engages the one or the other shoulder and thus prevents the clutch from being thrown in. Simultaneous operation of the treadles is prevented by an inverted V-shaped bar pivoted midway between the treadles. The cross-head 5 is supported on actuating rods 4 reciprocated by cams on a countershaft 11, which makes one revolution for each four of the driving-shaft 8. The cams are so designed that the cross-head makes two complete reciprocations for each revolution of the countershaft. The cross-head carries a removable nail-block 17, Fig. 8, above which is situated a driver-block 19 on a plunger 226 operated by a lever 222 connected by a universal joint to the end of a rod 220 having a telescopic connexion to a driver actuating rod 216 operated by a cam on the countershaft. The machine is intended to operate upon loaded heels such as those produced by the machine described in Specification 12,867/09, in which the nails have been driven at an angle to the tread face. The plunger 226 is arranged to move obliquely in the general direction of the nails in the loaded heel. While the cross-head is descending to compress the heel, the driver cam is not in operation and the hammers are not moved, the telescopic joint between the rod 220 and the sleeve 219 closing up. After the heel is compressed, the driver rod is actuated, and, since the rod 220 then bears on the bottom of the sleeve 219, the drivers force the nails into the shoe and clinch them in the inner surface of the heel seat. The ends of the nails are left projecting to receive a top-lift. During the nailing operation, a roughened wedge is forced against the back of the heel to prevent movement due to the oblique driving of the nails. The top-lift holding - devices are supported by a carrier on arms 234, Fig. 9, mounted on a rock-shaft 235 operated by a rod 236 connected to a bell-crank lever 238, 240, Fig. 2, itself connected by a link 241 to a second bell-crank lever 243, 245 having a roll 246 engaging a cam on the driving-shaft 8, the arrangement being such that, as the cross-head descends for compressing and nailing, the top-lift rod 236 also descends, bringing the top-lift carrier towards its position under the nail - block. As the cross - head ascends, the carrier completes its movement. The shoe is held in its depressed position, to permit the movement of the carrier, by a roll 248, Fig. 5, on the lever 198, which is adapted to engage above the projection 201 on the measuring support 197. The cross-head then descends a second time