| 摘要 |
PROBLEM TO BE SOLVED: To prevent thread breaking or the like by arranging a cushioning member that absorbs a change in a tensile force acting on a needle thread in a needle thread route leading to a sewing machine head from a bobbin by absorbing an excessively great tensile force acting on the needle thread in a needle thread supply mechanism that supplies a needle thread reeled out from a bobbin through a thread guide to a sewing machine head. SOLUTION: With the consumption of a needle thread as a result of the operation of a sewing machine, the needle thread (a) is reeled out sequentially from a bobbin and supplied to an adjusting table 10 furnished with a tension member 8 corresponding to each needle bar through a thread handling area and a cushioning member 15. At this time, when sewing is carried out with a large stitch length, as the needle thread (a) is drawn out greatly, a great tension acts on the thread (a). If such a great tension acts, a spring 1 5b comprised of thin steel wires fixed to a mounting portion 15a in the cushion member 15 deforms elastically, reducing a sudden increase in a tension and avoiding breaking the needle thread (a) or affecting adversely sewing.
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