Patent ID: 8220401

Claim:
A sewing machine for covering chain stitch that performs sewing operation of a cloth sent frontward, comprising: a plurality of needles that sew the cloth and are configured with not less than three needles arranged in a right and left direction, wherein a needle at one side in the right and left direction among the plurality of needles is arranged above a position where another needle at another side in the right and left direction among the plurality of needles is arranged; a cover thread guide that has a guide hole being longer in a front and back direction and guides, through the guide hole, a supplied top cover thread; a cover thread looper that catches and pulls out the top cover thread guided by the cover thread guide; and a thread push member that pushes the top cover thread, wherein the top cover thread guided by the cover thread guide is arranged on a surface of the cloth in association with movement of the cover thread looper and the thread push member, the cover thread looper is arranged under the cover thread guide and performs advancing and receding movements while crossing in front of the plurality of needles, and the thread push member is arranged above the cover thread guide, swings synchronously with the movement of the cover thread looper and forcibly moves the top cover thread, against a thread tension of the cover thread, toward a back side of the guide hole by swinging.