HOLING MACHINE, HOLING STITCH FORMING METHOD, AND HOLING STITCH SEWING PROGRAM

摘要

PROBLEM TO BE SOLVED: To eliminate the rugged feeling of a buttonhole overcast stitch in the case of forming at least a pair of first and second straight overcast stitches and a bar tacking stitch which is positioned at the ends of the straight overcast stitches in turns. SOLUTION: When an eyelet holing stitch 39 is formed, a sewing mechanism immediately after sewing left straight overcast stitches 39b is rotated by 90°clockwise in a plane view by a rotary mechanism and a feed slide is shifted toward the left straight overcast stitches 39b from the right straight overcast stitches 39a by about half the length L of the bar tacking stitches 39d before starting the sewing of the bar tacking stitches 39d. Then the bar tacking stitches 39d are formed so as to become a stitch forming direction D4. Accordingly, the loop connection parts DSc of bobbin thread loops in the bar tacking stitches 39d are formed at parts spaced from the lower end parts of the loop connection parts DSc of the bobbin thread loops in the right and left straight overcast stitches 39a, 39b. COPYRIGHT: (C)2005,JPO&NCIPI