| 摘要 |
PROBLEM TO BE SOLVED: To optionally and easily form a variety of pine needle patterns different in the number of loops while downsizing without using a large diameter cam or a large diameter gear. SOLUTION: In a sewing machine equipped with a needle swinging mechanism, a looper swinging mechanism, a feed cam 41 rotating for every set number of needle handling, interlocking with the rotation of a main shaft 12, a linking mechanism E swinging in response to the rotation of the feed cam 41, a feed dog vertical operating mechanism F feeding a fabric by vertically operating the feed dog 8 by the swinging of the linking mechanism E and capable of releasing a plurality of seams stored in a plurality of claws of a needle plate from the claws and forming a pine needle pattern, a double reduction means D comprising a belt type reduction mechanism 51 using a timing belt 50 and a reduction gear mechanism 47 is provided between the main shaft 12 and the feed cam 41. The feed cam 41 is structured so as to feed a fabric two to six times by the feed dog 8 during its rotation.
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