Patent GB-630255-A (GB)
Title: Improvements in and relating to hydraulically-operated shoe upper conforming machines
IPC: A43D23/02
Filed: 1946-09-03
Abstract: 630,255. Lasting-machines. BATA, NARODNI PODNIK. Sept. 3, 1946, No. 26487. Convention date, April 4, 1945. [Class 17 (i)] The shaping and wiping devices of a machine for conforming the toe end of a shoe upper to the shape of a. last and tacking the upper in position are carried on a pivoted arm and are operated hydraulically, as is also the pivoted arm, in such manner that they adapt themselves to the shape and size of the work after impact with it. The invention in one form comprises an arm 1 pivoted at 2 intermediate its ends on the machine frame and carrying on its longer arm a head 3 in which the operative devices are mounted, and on the shorter arm a block 4 in which are carried the pressurefluid operated pairs of cylinders 12, 121; 29, 37, which control respectively a toe former 20 which holds the sides and toe of the upper closely to the opposite sides of the last, and forward and closing movements respectively of wiper plates 42, which wipe the edge of the upper over the last and hold it against the insole, to which it may be attached by driving tacks &c through holes 43 in the wipers, or by adhesive. A shoe on a last is held in the hand of the operator and is placed on a support 61 with the arm 1 in its raised position (shown dotted) the pistons of the working cylinders 12, 12<SP>1</SP>, 29, 37 being in their retracted positions to the right, with the former 20 and wipers 42 open. Pressure of shoe by operator on support 61 permits release of bars 50 from locking teeth 71 and, on admission of pressure fluid to the cylinder 57 which is pivoted on the machine frame, piston 56 is moved to the left to depress the arm 1 through toggle links 53, 59 and bars 50. A lever 76 is turned anti-clockwise on its pin 75 by rolling of a roller 77 on a cam surface 78 when the arm 1 is moved down and carries with it a two-armed lever 74, a pad 73 on which is clamped against the shoe toe to hold it on the support 61 under action of a spring 80. Fluid pressure is then admitted to the intercommunicating cylinders 12, 121 through a pipe 15 to move the piston 11, piston rods 10, bars 9, cranked bars 6 and links 18 to apply equal pressure to the opposite sides of the former 20 irrespective of the extent to which it engages and holds the upper on opposite sides of the last and permit the upper to be released from the tension of grippers, not shown. Fluid pressure admitted to the intercommunicating cylinders 37, 29 moves the wiper members 42 to smooth the toe end of the upper in over the last, the piston 28 first moving a slide 23 to move the wiper members 42 forwards until the movement is interrupted by engagement with the downwardly projecting toe end of the upper below the last bottom, when the pressure in the cylinders 29, 37 rises, and piston 36 moves slide 31 in slide 23 to the left to move a link member 39 and the wiper members 42 forwards along circular grooves 44 to close the members 42 over the edge of the last. Contact of a projection 82 with the outer periphery of the former 20 halts the closing of the wiper members 42 with the holes 43 therein in correct position relative to the shoe edge. Tacking of upper to insole may then occur, where upper is to be secured by adhesive, or the holes 43 may be omitted. After attachment of upper to insole is complete, fluid pressure is admitted to pipe 84, pipe 83 being connected to outlet, to cause the arm 1 to be swung upward the shoe remaining clamped on the support by pad 73 until it is released by the cam surfaces 78. The former 20 is then opened, by admitting pressure fluid to cylinders 12, 12<SP>1</SP>, and the wiper members 42 are returned to their initial open position, by admission of fluid pressure to cylinders 29, 37.