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    • 91. 发明公开
    • SEWING MACHINE NEEDLE AND METHOD OF MANUFACTURING SAME
    • Nähmaschinenadelund Herstellungsverfahren。
    • EP0538486A1
    • 1993-04-28
    • EP92909648.5
    • 1992-05-11
    • ORGAN NEEDLE CO., LTD.
    • TAKEI, YoshitsuguKOJIMA, Tsutomu
    • D05B85/02B21G1/04
    • A61K31/155A61K31/7004B21G1/04D05B85/02A61K31/085A61K2300/00
    • A sewing machine needle is manufactured by die-pressing the whole needle trunk portion without causing burrs on the needle trunk. A needle material (10) has its needle trunk (14, 16) drawn into two stages, and further, a thin portion (22) previously formed to form a scraped-out portion above a needle hole. By die-pressing, the opposite side portions of a needle groove (28) are extended to a predetermined angle, and the scraped-out portion (40) of a desirable shape and a needle hole portion (33) are formed. The needle thus obtained has sufficiently high rigidity as a whole and a space between the needle trunk and a sewing thread is large, so that sewing work can be stably carried out and operations at high speed can be performed.
    • 缝纫机针是通过对整个针干部分进行压模而不引起针头上的毛刺来制造的。 针状材料(10)具有被拉伸成两个阶段的针头躯干(14,16),此外,预先形成有在针孔上方形成刮出部分的薄部(22)。 通过冲压,针槽(28)的相对侧部分延伸到预定角度,形成期望形状的刮出部分(40)和针孔部分(33)。 由此得到的针整体的刚性足够高,针筒和缝纫线之间的空间大,能够稳定地进行缝纫作业,能够进行高速的操作。