Patent ID: 6079234
Filing Date: 2000-06-27
Classification: D04B

Abstract:
A jacquard knitting machine comprising a yarn feeder, the yarn feeder including:a base frame fixedly fastened to a part of the jacquard knitting machine;a horizontal plate fixedly fastened to said base frame at a top side, said horizontal plate having a plurality of thread eyes for guiding yarns;a drive wheel mounted on said base frame at a top side;a locating plate fixedly fastened to said base frame at a bottom side, said locating plate having two parallel rows of vertically spaced thread eyes for guiding yarns;a yarn guide wheel unit suspended below said base frame and coupled to said drive wheel, said yarn guide wheel unit comprised of a plurality of yarn guide wheels, and a plurality of rubber bands respectively mounted on said yard guide wheels, said yarn guide wheels each having a recessed peripheral wall, the rubber band at each of said yarn guide wheels forming an annular convex portion around the periphery of the respective yarn guide wheel and dividing the recessed peripheral wall of the respective yard guide wheel into an upper thread groove and a lower thread groove; anda plurality of yarn brackets fixedly fastened to said locating plate at one side at different elevations corresponding to said yarn guide wheels, said yard tension brackets each comprised of a yarn tension rocker, a casing, a cover plate, an adjustment plate, an adjustment screw, a spring member, and a connecting plate, said yarn tension rocker being pivoted to said casing and having an upper thread eye and a lower thread eye arranged at one end remote from said casing, said casing having a screw hole at one end thereof, said connecting plate having one end connected to said yarn tension rocket and an opposite end connected to said spring member inside said casing, said spring member having one end connected to said connecting plate inside said casing and an opposite end connected to said adjustment plate, said adjustment plate being disposed inside said casing and connected to said spring member, said adjustment screw being threaded into the screw hole at one end of said casing and connected to said adjustment plate and rotated in said screw hole to adjust the spring force of said spring member, enabling the tension of said yarn tension rocker to be adjusted, wherein:said casing comprises a countersunk hole and a bearing mounted in the countersunk hole at said casing;said cover plate comprises a countersunk hole and a bearing mounted in the countersunk hole at said cover plate;a pivot shaft is supported on the bearing at said casing and the bearing at said cover plate, said pivot shaft comprising a first round pin and a second round pin respectively axially extended from two opposite ends thereof in reversed directions and respectively inserted through the bearing at said casing and the bearing at said cover plate, and a U-shaped rod perpendicularly raised from the periphery thereof and hooked on one end of said connecting plate;the yarn tension rocker of each of said yarn tension brackets comprises a first wire rod and a second wire rod, said first wire rod having a first end terminating in an eye end fastened to the first round pin of said pivot shaft and suspended above said casing and a second end suspended outside said casing, said second wire rod having a first end terminating in an eye end fastened to the second round pin of said pivot shaft and suspended below said cover plate and a second end suspended outside said casing and said cover plate; andthe lower thread eye and upper thread eye of the yarn tension rocker of each of said yarn tension bracket are respectively formed integral with the second end of the first wire rod and the second end of the second wire rod of the yarn tension rocker of the corresponding yarn tension bracket.