| 摘要 |
Disclosed is a sewing machine with work edge cutting mechanism having an upper blade 13 a which is operated to cut the work edge in cooperation with a lower blade 1 a during stitching operation, the upper blade being stopped and retreated to an inoperative position below the needle plate 30 in case the stitching operation is performed without necessity of cutting the work edge, the swing machine substantially comprising a main drive shaft 2 which is rotated to vertically reciprocate a machine needle 31, a means for converting the rotation of the main drive shaft into vertical movement, a means for transmitting the vertical movement to the upper blade, a means for intercepting the transmission movement of the transmitting means, wherein the intercepting means is operated to cause the upper blade to retreat from the operative position to the inoperative position below the needle plate.
|
