Patent GB-726321-A (GB)
Title: A pulling-over machine
IPC: A43D21/02
Filed: 1951-08-07
Abstract: 726,321. Pulling-over machines; stapling. BROK, C. A. Aug. 7, 1951 [Aug. 9, 1950], No. 18623/51. Classes 17 (1) and 89 (3). In a pulling-over machine wherein side and toe grippers act in fixed relationship to a shoe supported bottom downwards, the grippers are arranged to rise above the level of the insole and to move towards the last in a combined vertical and horizontal movement before gripping the upper, after which they move away and commence to pull the upper down before drawing it under the insole where it is stapled or otherwise fixed in position. The grippers thus grip the upper above the insole, allowing a smaller lasting allowance to be used and then past its edge, moving in a curved path of combined horizontal and vertical movements to reduce the friction of this action and to prevent buckling of the insole. Only a single side gripper and its control mechanism is illustrated in Fig. 1. This comprises jaws 24, 25 on a jaw carrying member 16 telescopically mounted on a brake house 15 which is pivoted on a shaft 13 of a member 12 to which vertical movement is imparted by a connecting rod 8, from a curved path 5<SP>1</SP> of cams 3, 4 on a shaft 2. A lateral guide 11 pivotally mounted on a member 10 receiving vertical movement from a curved path 5 on the cam 4, has guiding pins 22 on projecting members 21 running in grooves on the brake house 15. A slot 17 on the guide 1 is engaged by a fixed pin 18 so that the guide, and thus the gripper, is caused to swing as it is moved vertically. A slide 37, Fig. 2, in a casing 27 of the jaw carrying member 16 is engaged at 42 by the top of the guide 11 when near its uppermost position and is connected to it by a rod 40 and spring 41. Toggle arms 31, 32 on a shaft 33 are pivoted to the casing 27 and jaw 25 at 34, 35, and are engaged by a pin 36 attached to the slide 37 which when lowered breaks the toggle to open the jaws against a' spring. The telescopic connection of the parts 15, 16 includes a spring operating with an oil braking device and a mechanical brake is provided by an arm 58 having an adjustable spring pawl engaging a non- concentric grooved curve 57, Fig. 1. In operation, with the guide 11 near its bottom position and the slide 37 at its top position, the brake house 15 is moved upwards to its top position and at the same time the slide 11 moves fully to its bottom position, thus swinging the gripper towards the last as it moves up, the guide 11 at the same time lowering the slide 37 by the rod 40 to allow the grippers to close. As the guide 11 reaches the bottom, pins 50 engaging guideways 43, Fig. 2, pass down cam surfaces 44, 45, at which point a locking member 51 enters a notch in a rod attached to the member 16, thus locking together the guide 11 and member 16 mounting the grippers. The grippers, having gripped the upper, the brake house 15 moves down, parting from the member 16 locked to the now stationary slide 11, tensioning the spring connection until the surfaces 44 strike the pins 50 to allow the spring to draw the member 16 down against the oil brake until the mechanical brake reaches a predetermined state of equilibrium. During this downward movement of the gripper, the guide 11 is moved up by the curved path 5 first swinging the grippers away from the last and then in under the insole. The first cycle of the machine being complete it stops. On restarting the machine the guide I continues to move up relative to the gripper and a pawl 73, Fig. 2, enters a bore 71 of the guide to force down a percussion block 91 of a stapling mechanism. The lateral guide 11 is during this movement interrupted by the slide 37 which is then forced upwards so that co-operating sharp edges 67, 67a, Fig. 10, cut off a piece of wire 88 from a wire 87 fed by known means through a passage 66 to form a staple which is deposited in a groove 89 of the slide 37 and then formed by a device 68 which is finally pushed aside so that the staple can continue up a groove 90. At the same time the slide 37 allows the gripper jaws to open and a rack 78, Fig. 1, on the guide 11 acting through a gear 79 and rack 80 causes a pressure shoe 85 to engage the shoe and finally the pawl 73 will release the percussion block which will drive the staple acting through a pin 72, Fig. 10, since the bore 71 and grooves 89, 90 are in line in this position. A handle 64 allows adjustment of the upper while the machine is stopped. The other side gripper is similarly mounted on a member 10<SP>1</SP> and a toe gripper is also provided.