GB941309A - Improvements in or relating to shoe upper conforming machines - Google Patents

Abstract

941,309. Shoe upper conforming machines. BRITISH UNITED SHOE MACHINERY CO Ltd., and G. C. BARTON. March 1, 1960 [March 2, 1959], No. 7088/59. Heading A3B. In a shoe upper conforming machine, having work-supporting means, a plurality of grippers, toe wipers, and ball-grippers and wipers, clamping members are provided to engage the upper at opposite sides of the share prior to the grippers releasing their hold for the over-wiping operation. The clamping members comprise, at each side of the last, a pair of clamps 8, 9 mounted on arms 11, 12 and moved by fluid pressure operated means. Arms 11 and 12 are connected to a cylinder member 18 slidable along a piston rod 20, which is integral with support bracket 6. Fluid pressure urges cylinder 18 along rod 20 to carry clamps 8, 9 into engagement with the upper. Fluid passes through an axial bore 22 into an extended bore portion of member 18 and through part 30 into enlarged bore portion 32. Clamp arms 11 and 12 are connected to cylinder 18 by pairs of parallel links 36 and 38 to enable clamps 8 and 9 to engage varying contours of lasts. Faces 39 on cylinder 18 limit the movement of links 36, 38. Clamp 9 is mounted for arcuate movement lengthwise of a shoe and has an arcuate face 42 which abuts an arcuate face in arm 12. Clamp 8 is mounted for rotatable adjustment about the axis of rod 20, a pinion 44, integral with collar 34, meshing with a worm rotatable by an adjusting knob 50. A pin 52, carried by cylinder 18, engages slot 54 in collar 34 to rotate cylinder 18 when knob 50 is rotated. Upward movement of ballwipers-support arm 70 about a shaft 3 causes upward movement of the clamping members, through the engagement of a pin 72 with a slot 74 in a link 76. The other end of link 76 is attached to the eccentric stem of an adjusting screw 78 which gives heightwise adjustment of the clamping members relative to the ball wipers and the shoe. As the ball lasting and clamping members are raised, a spring 96 swings a lever 90 to move a finger 84 to the left allowing a spring 64 to move a guide finger 56 towards the shoe to a limit determined by the engagement of a block 68 with the head of an adjusting screw 62. The guide fingers 56 are positioned on opposite sides of the machine and are arranged to move towards the upper to position marginal portions thereof between the jaws of the ball grippers. Clamps 8 and 9 remain in engagement with the upper during inward wiping movements of the wipers and at the end of the machine cycle fluid pressure is relieved and the member 18 retracted by springs 98. In the inoperative position of the clamping members a cam block 82 secured to arm 12 is engaged by finger 84 to urge arm 12 to the right, and swing links 36, 38 anti-clockwise. A plate 94 on one of plates 58 is engaged by one of links 38 to urge plates 58 and guide finger 56 away from the shoe. For positioning clamps 8 and 9 lengthwise of a shoe, relatively to the associated ball lasting unit, bracket 6 may be pivotally adjusted about a screw 100 by means of an eccentric screw 102. Clamps 8 and 9 may have work-engaging faces 14, 16 of rubber or other suitable material. Specification 871,990 is referred to.