GB887246A - A spring looping machine - Google Patents

Abstract

887,246. Jigging conveyers. FRIDEN Inc. Oct. 12, 1959, No. 34564/59. Class 78 (1). [Also in Group XXII] In a spring looping machine, axially aligned springs 67 with unlooped ends are fed to a conduit 50 from a spiral ramp in a vibratory hopper feeder 35, vibrated with a rotary as well as a vertical motion by electromagnet means, the amplitude of the vibration being adjustable. The conduit 50 discharges, through a demagnetizing coil 245, into a downwardly-inclined trough 51 secured to a plate 52 vibrated in a plane perpendicular to the trough 51 to impart rotary motion, about their axes, to the springs 67 as they pass down the trough 51. A spring 67 thence passes into an aligned diametrical bore 66 in a turret 64 rotatable on the plate 52, a latch 120 on a pivoted arm 115 being rocked by a stud 76 on the turret 64 to allow only one spring to pass into the bore 66. The spring 67 passes through the bore 66, still rotating due to the vibration of the plate 52, until it abuts shoulders, flanking a recess 71 in an anvil 69 on the turret 64 and arranged so that one full turn of the spring projects beyond the bore 66. A loop-forming tool 187 on a shaft 189 is then rocked by a cam 203, Fig. 4, to form the end loop in co-operation with the anvil 69, a switch 221 operated by the cam 203 stopping vibration of the plate 52 during the loop forming. The tool 187 is then raised and the turret 64 rotated 90 degrees, by a cam 131 rocking a lever 139 moving a rod 151 and crank means, so that the spring 67 falls into a bore 82 in a turret 80 which is rotated 90 degrees by the rod 151 so that the spring slides into a bore 92 in a turret 90, also operated by the rod 151 and cam 131. A tool 188 is rocked by the cam 203 to form a loop at the other end of the spring which now projects from the bore 92. The turret 90 is then rotated to discharge the spring, now looped at both ends. Air injector means may be provided to blow the springs through the bores of the turrets. A counter 180 may count the springs. In a modification, Figs. 16, 17, vibration is applied only to the first and last turret means 364, 390. The bore 366 of the turret 364 is formed in a bar 362 mounted on leaf-springs 379 and bar 360 on the turret 364 and vibrated by electromagnet means 377. The bore 392 in the turret 390 is likewise vibrated independently of its turret. Compressed air is supplied to the bores by jets from passages 435, 445-448, controlled by valves, in a manifold 401, actuated by a cam 425.