| 摘要 |
PROBLEM TO BE SOLVED: To suppress backflow of a compressed air stream in a weft insertion nozzle of a weft insertion apparatus utilizing the compressed air stream. SOLUTION: The compressed air stream is passed from a first annular chamber 15 through a straightening passage 16 and a compressed air stream passage 28 and jetted from a first jetting passage 29 into a joining passage 25. The compressed air stream in the first annular chamber 15 is made to inflow even from inlets 31 of second jetting passages 30 and jetted in a state of low pressure loss from the second jetting passages 30 in the weft insertion direction into a weft yarn passage 12. A weft yarn 5 is transported through the interior of the weft yarn passage 12 by driving force of the compressed air stream jetted from the second jetting passages 30. The compressed air stream jetted from the second jetting passages 30 drives the compressed air stream jetted from the first jetting passage 29 in the weft insertion direction in the joining passage 25 and acts as force for suppressing the backflow. Thereby, the driving force in the weft insertion direction can be increased. COPYRIGHT: (C)2007,JPO&INPIT
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