Sewing machine

摘要

A sewing machine includes a sewing head having a sewing needle to be vertically reciprocally driven, and a shuttle base having a shuttle to be rotatably driven in synchronism with the vertical movement of the sewing needle for forming stitches. A machine frame includes a pair of support posts spaced laterally from each other, an upper frame having greater rigidness for mounting the sewing head thereon, and a lower frame having greater rigidness and disposed below the upper frame for mounting the shuttle base thereon. Each of the upper frame and the lower frame extends between the pair of support posts and is fixed thereto.