Patent GB-191013301-A (GB)
Title: Improvements in or relating to Machines for Rounding or Channelling or for both Rounding and Channelling the Soles of Lasted Boot and Shoes.
Inventor: BOULT ALFRED JULIUS
IPC: A43D43/02
Filed: 1910-06-01
Granted: 1911-09-01
Abstract: 13,301. Boult, A. J., [United Shoe Machinery Co.]. June 1. Trimming ; channelling.-Machines for rounding, channelling, or both rounding and channelling the soles of lasted boots, in which pattern mechanism is provided to control the relative travel of the tool round the shoe, are provided with means for shifting the pattern mechanism during this relative movement to bring it into time relationship with the feed of the shoe, and for automatically setting the pattern mechanism for movement alternately in opposite directions. Other features relate to improved means for actuating and controlling the channelling-knife, an improved sole-support, and improved grading-devices for varying the paths of movement of the tool as it passes from the shank to the forepart, or vice versa. The invention in described as applied to the machine described in Specifications 4426/98 and 28,922/09, which comprises a trimming- knife 1, Figs. 1 and 9, a yieldingly-mounted work-support 2, which also acts as a shank-guide, a sole-support 3, a channelling-knife 4, a feedplate 5, and a forepart-guide 6 is carried by a movable arm 7. The knife 1 is secured in a slide 8, which is mounted in a removable bed 9, and is reciprocated by an arm projecting from a yoke 11. This yoke is formed with bearings for a shaft 18, from which a cylindrical arm 20 extends into an inclined bearing at the end of the main cam shaft 21. The forepart-guide 6 consists of an arm 24, which is held yieldingly against the shank-guide 2 or feed-plate 5 by a spring plunger. The arm 24 is pivoted to a slide . 26, which carries an adjustable screw 29, adapted, when the guide is brought into operation, to engage a plate 30 on the guide 2, causing the two guides to move together round the forepart of the shoe. The slide 26 is adjustable to vary the amount of projection on the sole edge by a crank-pin projecting eccentrically from a rotatable disk mounted in a plate 34 on the end of the arm 7; this disk is operated and locked by a latch lever 35 adapted to engage one or other of a series of notches 36 in the plate 34. The arm 7 extends forward from a yoke 38 secured to a rock-shaft 39, and is operatedagainst the action of a spring 40 to move the guide 6 into operation by connexions with a rock-shaft 41, which is actuated through a treadle rod 43. When the guide is thrown into operation, the relative position of the guide and trimming-knife 1 is controlled by one of a series of cams 47, Figs. 1 and 18, adapted to be engaged by a roll 48 carried by a block 50, which is adjustable along a bar carried in an arm 49 projecting from the yoke 38. The cams are secured and interlocked by keys to an arbor 51. one end of which is coupled to the driving-shaft 54, while the other end is supported on a shaft mounted for longitudinal movement to allow the removal and insertion of arbors carrying cams of different shapes. The cams are intermittently advanced to vary the position of the guide 6 during the rounding operation, and they are arranged to be driven alternately in opposite directions for right and left shoes. The shaft 54 is actuated through an adjustable friction clutch 63, 64 from a surrounding sleeve 61, which is driven by a worm and wheel 69, 70 from a vertical shaft 71. This shaft is rotated by the engagement of one or other of two spring- pressed pawls 73, 74, Fig. 19, carried by a bell-crank lever 75 with a ratchet 72 on the lower end of the shaft. The lever 75 is operated through a link 82 and segmental slide 83 from a shaft 85, Fig. 18, which is adapted to be connected with or disconnected from the trunnion of the yoke 11 by means of coupling- plates and a spring-pressed pin. The movement of the cams 47 is adjustable to the size of shoe by varying the position of the slide 83; this is effected through rack &c. gearing 94, 95, 96, Fig. 18, a lever 97, and a slide 100, which is adjustable along a size bar 101. The pawls 73, 74 are normally held out of engagement with the wheel 72 by guards 78, 79, Fig. 19, carried respectively by spring- pressed slides 104, 105. These are actuated, to throw the pawls into gear, by the engagement with pins 117, 118, Figs. 16 and 18, projecting from the slides, of a movable block 120 mounted in a lever 116, which is actuated through a sliding bar 122 and connexions with a knee lever; the slides are locked in position by latches, which are released again by an arm projecting from the rock-shaft 41, whereupon the forepart guide is moved out of operation. The block 120 is automatically shifted so that its position may correspond with the pattern cams, by the engagement of pins 134, 135, Fig. 16, adjustably mounted on a disk 136 secured to the shaft 54, with a reversing-lever 137 pivotally mounted for limited movement on the machine frame. This lever overlies and actuates an arm 139, which is connected by a link 143 with the block 120; locking-devices are provided to hold the block 120 in the positions in which it is moved to engage one or other of the pins 117, 118. In order that the pattern cams and shoe may be maintained in proper relation during the relative travel of the tool about the shoe, the disk 136 is furnished with two adjustable timing-pins 149, Fig. 16, which are adapted to be engaged by spring-pressed pawls 151, 152 carried by links connected to a lever 156. The pawls are normally inoperative, but are adapted to be moved manually to engage the pin 149 through the sliding-bar 122, which engages a spring-pressed latch 161 depending from the lever 156; a stop 163 releases the latch to allow the pawls to move into inoperative positions after each movement of the bar 122, which may be actuated bv the operator at any time to correct the relationship between the tool and work. The grading-devices, which determine the amount of sole extension for Scotch and Baltimore edge shoes and the relation of the extension of the forepart to that of the shank, and which also provide for a gradual change in the extension at the junction of the forepart and shank, comprise two plates 164, 170, Fig. 1, carried respectively by the arm 22 of the shankguide and spring-pressed lever 171 pivoted to this arm, and two co-operating rolls carried by adjustable plates 166, 175 clamped to a boss on the side of the arm 7 of the forepart-guide. These rollers may be adjusted from a position in which they are concentric with the shaft 39 of the yoke 38, in which position the grading- devices are inoperative, to a position in which one or both are eccentric to the shaft, which causes the shank guide to move so as to vary the widtb of sole extension as desired. The sole-support 3, Figs. 1 and 9, carrying the channelling-knife 4, is mounted for self-adjustment to rock about the point of operation of the knife as a centre in segmental guides in a carrier slide 183, which is vertically movable in a vibrating support 189 formed on the end of a rock-shaft 190. During its forward movement, the support 189 assists the feed-plate to feed the work, and during its return movement, it drags the knife 3 through the work. The solesupport 3 is pressed forward against the work by an adjustable spring 198, which is connected to an arm 200 extending from a rock-shaft 201. A second arm 202 secured to this shaft is connected to a rod 203 extending through and engaging a bore in the shaft 190. By adjusting these connexions, the pressure of the support against the work may be kept constant notwithstanding its movement due to variations in the thickness of the work; or the adjustment may be such that the pressure of the support increases as the thickness of the work increases. For introducing the work, the support 3 may be moved rearwards by means of connexions controlled by a hand-lever. The initial position of the channelling-knife 4 is adjusted by means of the slide 183, which is connected by adjustable links 214, 215 to a rock-shaft 213. The position of the knife may also be changed when the forepart-guide is thrown into operation, to cut the channel nearer the edge of the sole round the forepart than in the shank: For this purpose, the shaft 213 is coupled by adjustable connexions to the rock-shaft 41. These connexions include a radius link 225, Fig. 1, carrying a block which can be snapped into engagement with a number of holes in a guideway 221; the position of the block determines the variation, if any, of the position of the knife. A second series of connexions between the channelling- knife and the shaft 41 are provided to slide the knife in and out of the sole-support 3. These connexions may be adjusted so that the knife remains wholly active or inactive, or is thrown into operation at the shank and withdrawn at the forepart or vice versa; an adjustable stop adapted to engage the forward end of the link connected to the knife is provided to hold the knife firmly in active position, so as to prevent it from being drawn forward by the work. The feed-plate 5 is given a four-motion movement to feed the work, and is also brought into engagement with the sole midway of its backward movement to support the sole against the action of the trimming and channelling knives.