Weft picking system for a fluid jet loom including a roller type

Abstract

A weft picking system for an air jet loom provided with a microcomputer as a controller. The weft picking system comprises a weft traction device including a pair of rollers one of which is driven by an inverter motor. A weft yarn fed from a weft measuring and storing device can be put between the rollers to be drawn toward a weft posture regulating nozzle. The weft posture regulating nozzle is arranged to project the weft yarn into the shed of warp yarns while regulating the posture of the weft yarn, under the influence of an air jet ejected therefrom and under assistance of air ejection from a plurality of sub-nozzles. The rollers are always driven to rotate during a weaving operation of the loom. A change-over device is provided to change the weft yarn from a first state of being put between the rollers to a second state of separating from the rollers or vice versa. The changing from the second state to the first state of the weft yarn is made after the starting of ejection of the fluid jet from the weft posture regulating nozzle in a weft picking cycle thereby preventing the weft yarn from being slackened in a location between the weft traction device and the weft posture regulating nozzle.