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OUTER SUPPLYING DEVICE OF LOWER YARN ON SEWING MACHINE TO REDUCE LABOR AND TIME OF LOWER YARN CHANGING WORK AND INCREASE WORKABILITY AND PRODUCTIVITY
OUTER SUPPLYING DEVICE OF LOWER YARN ON SEWING MACHINE TO REDUCE LABOR AND TIME OF LOWER YARN CHANGING WORK AND INCREASE WORKABILITY AND PRODUCTIVITY
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机译：缝纫机下纱的外部供应装置，以减少下纱的劳动和时间，并减少了工作时间，提高了工作效率和生产率
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摘要
PURPOSE: An outer supplying device of lower yarn on a sewing machine is characterized by supplying the lower yarn from an external large spool continuously, operating a lower yarn device smoothly, reducing labor and time of lower yarn changing work and increasing workability and productivity. CONSTITUTION: On a sewing machine, an outer supplying device of lower yarn comprises: an outer shuttle box(10) rotated by a power unit and installed on a driving shaft(11); an inner shuttle box(20) set in the outer shuttle box(10) and installed a stud(21); a winding drum(31) inserted into the stud(21); a bobbin(30) containing the winding drum(31) and a flange(33); a bobbin cap(40) keeping the bobbin(30) and containing a fixing tube(42); a through hole formed on an outer side of the bobbin cap(40); cut parts formed on both sides of the fixing tube(42); a through hole formed on the flange(33) and connected with the through hole of the bobbin cap(40); cut parts formed on both sides of the winding drum(31) and connected with a lower yarn path of the stud(21); and the lower yarn path formed on the stud(21). The lower yarn is supplied through the through hole of the bobbin cap(40).
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