Patent ID: 6053119
Filing Date: 2000-04-25
Classification: D05B

Abstract:
A lower thread automatic supply device for a sewing machine having a sewing machine bed and a hook below the sewing machine bed to accommodate a bobbin case with a bobbin, the lower thread automatic supply device comprising:a bobbin replacing device including bobbin case-mounting and removing means for mounting the bobbin case onto the hook of the sewing machine and for removing the bobbin case from the hook, and delivery means for moving the bobbin case between the hook and a position spaced apart from the hook;first fixing means disposed at a given position on the sewing machine bed with the hook used as reference therefor; anda hold body including second fixing means to be fixed to the first fixing means, wherein the bobbin case-mounting and removing means and the delivery means of the bobbin replacing device are fixedly disposed at their respective given positions with the second fixing means as reference therefor,wherein, if the first and second fixing means are fixed together, then the bobbin case-mounting and removing means and the delivery means of the bobbin replacing device fixedly disposed on the hold body are fixed at their respective given positions with the hook as reference therefor.