Patent GB-191415945-A (GB)
Title: Improvements in or relating to Machines for Operating upon Heels used in the Manufacture of Boots and Shoes and to Work-conveying Mechanism applicable for use in connection with such Machines.
IPC: A43D87/00
Filed: 1914-07-03
Granted: 1915-10-04
Abstract: 15,945. British United Shoe Machinery Co., [United Shoe Machinery Co.]. July 3. Heels, machines for; trimming.-A machine for operating on heels in which there is relative movement between a holder containing the heel and a tool in a path corresponding to the contour of the sides of the heel is provided with automatic feeding-mechanism for supplying blanks to the holder, and automatic mechanism for bringing the holder into operative relationship with the tool. Alternatively, the tool operates upon the peripheral surface of the heel, and the automatic mechanism is arranged for relatively approaching the tool and holder to bring them into operative relationship. The machine described is for shaping the peripheral surface of rough heels, and comprises a conveyer chain for the heels, transferring-mechanism by which the heels are removed from the conveyer, a rotatable heel-carrier provided with two heel clamps to which the heels are successively transferred by the transferring-mechanism and from which they are subsequently removed thereby and replaced upon the conveyer, and a shaping-cutter to which the heel is presented by the heel-carrier, the heel clamps being moved transversely and angularly during the shaping operation to produce heels of the required size and pitch. The conveyer chain may be loaded by hand, or automatically, but preferably the machine to be described is designed to form one of a system of automatic heel-making machines, the chain being loaded automatically from a heel-block sawing-machine and conveying the shaped heels to another machine in which they receive further treatment. The conveyer chain, which is supported by sprocket-wheels 22, 23, Fig. 1, comprises a series of plate links 21 provided with front and end flanges 24, Fig. 10, of which the latter serve as breast gauges, and with downwardlyextending flanges 26 through which pass pivot rods 25. The chain is fed step by step by the engagement with feeding-teeth 28 on the ends of the rods 25 of spaced lugs 29 extending from a sleeve rotatable on, but sliding with, a rod 31, and is locked between each feeding-movement by the engagement with other teeth on the rods of lugs 58 extending from a similar sleeve on a rod 60; the sleeve on the rod 60 is actuated through link connexions 62, 63, 64 with a gear segment which rotates the sleeve on the rod 31, this segment and the rod 31 being actuated, respectively from cam shafts 54, 45, Figs. 1 and 3. The intermittent movement of the carrier brings each pivot rod 25, in turn, into a position in which it is supported on the raised portion of a guide 27, Fig. 10, which can be moved over a fixed plate 65 to adjust the feeding and locking mechanism bodily in the direction of feed. The transferring-mechanism comprises a pair of toothed jaws 71, 72, Fig. 10, carried respectively by an overhanging arm 73 integral with a rack slide 74, and a second rack slide 76; these slides are both mounted in a bracket 75 and are geared together so they move simultaneously through equal distances automatically to centre the heel. The jaws are closed yieldingly by a spring 80 surrounding a rod 79 fixed to the arm 73, and are opened by the engagement with a pin 82 projecting from the slide 76 of an arm 83 on a rock-shaft 84; a second arm 85 extending from this shaft rests on a plate 86 at the upper end of a lifting-rod 87, which is actuated from the cam shaft 54. The transferring- mechanism is moved bodily to transfer the heel to the heel-carrier by a sliding movement of the bracket 75, which is formed integral with an extension 96 of a slide 97. The slide 97 is actuated through links 98, 99, Fig. 4, and a slotted bar 103 embracing the cam shaft 54, by a cam on this shaft. The transferring-mechanism remains in this position until it receives a shaped heel from the heel-carrier, whereupon it returns to its original position and deposits the shaped heel on the conveyer chain. Each heel clamp of the heelcarrier comprises a pattern plate 105, Fig. 16, removably supported on a base 107 of a post 108 carrying a clamping-jaw 106, which is adapted to be pressed by a projection 112 of floating lever 111, Fig. 1, into engagement with a heel placed on the plate 105 by the transferring-mechanism. The lever 111, which is guided between a yoke-piece 113 forming part of the machine frame and a. plate 114 attached to the yoke 113, and also by a pin and inclined slot 115, 116, receives first a movement to clamp the heel with a light pressure, and then a short positive movement to press the jaw with the required pressure against the heel. The first movement is effected yieldingly by cam-controlled link connexions 117, 118, with the left-hand end of the lever 111, Fig. 1, while the second movement, which is adjustable, is applied to the right-hand end of the lever through a rod 132 and toggle connexions actuated from the cam shaft 45. The clamp jaw is retained in clamping position by a clutch roller 150, Fig. 16, pressed downwards between inclined steel plates 351, 352 by a spring-pressed plunger 353, while the jaw is further provided with short spurs 354 to prevent lateral movement of the heel during the shaping operation. After the shaping operation, the clamp jaw is released by means of lifting-hooks 151, Fig. 1, pivoted on the lever 111 and adapted to engage the projecting ends of the clutch roller 150. The shaping-cutter comprises a series of knives 167, Fig. 16, adjustably mounted on a rotating drum 168. The rotatable heel-carrier is mounted on a shaft 172, Figs. 4 and 16, journaled in the yoke 113 and a frame member, but between this shaft and the heel clamps are interposed mechanisms to move the clamps to cause the heel to be shaped to the desired pitch and outline. The base 107 of the post 108 is fixed on a shaft 109 journaled in a slide 174 movable in normally horizontal guides 176, Fig. 19, in a cradle 177, which is adapted to slide in segmental guides 179 connected by cross arms 149 with a sleeve 180 fixed to the shaft 172. A spring 189 mounted on a rod 187 connected to one end of a. link 184, which is pivoted at its centre to the slide 174, and at its other end to the cradle 177, acts constantly to force the slide 174 and heel clamp toward the cutter. To swing the heel clamp, the shaft 109 is universally connected to a two-part vertical shaft, 191, Fig. 4, the lower end of which is also universally connected to a short shaft 193 mounted in an arm projecting from a sleeve 195 rotatable with the heel-carrier. An arm 196 on the lower end of the shaft 193 carries a cam roll 197, which, in certain positions of the shaft, engages a non-rotatable cam 198, Fig. 8, shaped like a horse-shoe and open at both ends. When the heel clamp is in its forward position, the roll 197 engages the cam as shown to the right of Fig. 8, the rough heel being indicated at a. When the shaft 172 is rotated, the roll follows the cam until the heel reaches the position b. The roll then enters a recess 199 in an arm 200 fixed to a rock-shaft 201, Fig. 4, and this arm is swung during the shaping operation, by segmental gear actuated from the cam shaft 54, in the direction of the arrows 211, Fig. 8, to rock the shaft 193 and swing the heel into the position shown at c, bringing all the curved portion of the heel into engagement with the cutter. The arm 200 then swings back to its original position, and, owing to the resumption of the rotation of the heelcarrier, the roll 197 enters the other end 208 of the cam 198, where, by means of a spring latch 210, it is forced into a pocket 386, so that, when the heel-carrier reaches its original position, the heel is again in the position indicated at a. The rocking movements of the cradle 177 are produced by a swinging-frame comprising arms 214, Figs. 3 and 16, and a cross-piece 215, which is actuated through links 220, 222, 251 from a cam 225 removably secured to the shaft 54. A member 216 screwed to the cross-piece 215 serves as an abutment for the edge of the pattern plate 105, and also as a shearing-blade to co-operate with the cutters 167. The cradle 177 participates in the swinging movement of the frame through the engagement of segmenta.l lugs 227 on the cradle with slotted lugs 226 on the cross-piece 215, but in the normal vertical position of the frame, and when the heel-carrier is rotated, the lugs 227 pass through the slots in the lugs 226 into a slotted guidering 228, Fig. 19; the cradle and heel-clamp are in this way held in normal position while the heel-clamp is returned to the unloading position. By varying the shape of the pattern plate 105, the shape of the contour of the heel seat may be changed, while by changing the cam 225, the proper pitch or taper of the heel is ensured. The shaft 172 is rotated intermittently by the engagement with a pinion 229 of cylindrical feeding and locking racks 231, 230, actuated from the cam shaft 54. To correct automatically the position of the rough heel as it moves to the transferring-mechanism, a finger 259, Fig. 10, is provided yieldingly to engage the back of each heel and push it against the gauge 24. This finger drops into operative position under gravity, but is adapted to be elevated and held in an inoperative position during the time that the rough heel is taken from the conveyer and a finished heel substituted in its place; a latch is provided to prevent rebound of the finger as it drops into operative position. The cam shaft 54 is driven by gearwheels from a main shaft 242, Fig. 4, and the other cam shafts controlling the various mechanisms are driven by bevel-gearing from the shaft 54.