To easily and appropriately polish reusable sewing machine parts without wasting them by polishing the sewing machine parts such as a knife support bracket without taking much time.
A first grind stone applying mechanism 21 for applying a grind stone 20 is installed in a detachable manner on a feed table 13 which holds a workpiece and is installed in a movable manner to-and-fro for moving a sewing position of the workpiece to a position where a sewing needle 3 drops. A knife support bracket 11 applying mechanism for applying the knife support bracket 11 is installed above the feed table 13 in a way that the knife support bracket 11 may face the grind stone 20. A sewing machine is provided with a control means for controlling the polishing of the knife support bracket 11 by the grind stone 20 by moving the feed table 13 to-and-fro in a state that the grind stone 20 is in contact with the knife support bracket 11.
MURAI KENJI
SUGIYAMA TAKASHI
Takashi Ito
Yoshimi Hatanaka
Naoko Okura
Fumari Tamari
Takeyuki Suzuki
Shiro Isoda
Yohei Takahashi