| 摘要 |
PROBLEM TO BE SOLVED: To add various improvements such as the smooth movements of lower and upper threads during thread hooking or stitching, or the like, in the shuttle of the lock stitching sewing machine of a vertical taking type. SOLUTION: This shuttle of a vertical taking type is constructed in such a manner that by holding the large-diameter flange part 13b of a lower thread bobbin 13 having flange parts 13a and 13b between the edge part of a bobbin case 14 and the bottom part of a middle shuttle 12, a space is secured around the small-diameter flange part 13a, and a lower thread Y is taken out in a bobbin axial direction. In this case, an annular step part 13c is formed such that its other end is engaged with either one of the large-diameter flange part 13b of the lower thread bobbin 13 or the edge part of the bobbin case 14.
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