| 摘要 |
PROBLEM TO BE SOLVED: To shorten the remaining lengths of a bobbin thread and a core thread and to surely cut the bobbin thread and the core thread. SOLUTION: An eyelet buttonholing machine 1 is provided with freely vertically movable cloth pressers 55 and 56, a knife receiver 9 freely movable between an elevated position and a cutting position, a cloth cutting knife 11, an upper knife 61 and a lower knife 62 provided on a feed plate 58, an air cylinder 65 driving the upper knife 61 and the lower knife 62 from an opening position to a closing position, a presser driving cylinder 59 vertically driving the cloth pressers 55 and 56, a cloth cutting motor 8 vertically driving the knife receiver 9, and a controller 100 controlling the cloth cutting motor 8, the air cylinder 65 and the presser driving cylinder 59. After the cloth pressers 55 and 56 are elevated after sewing and eyelet hole formation, when the knife receiver 9 is positioned at a prescribed height between the elevated position and the cutting position, the controller 100 operates the air cylinder 65 and the upper knife 61 and the lower knife 62 are moved to the closing position. COPYRIGHT: (C)2003,JPO
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