Patent ID: 8312823
Filing Date: 2012-11-20
Classification: D05C,D05D

Abstract:
1. A sewing machine comprising: a vertically-driven needle bar; a sewing needle mounted to a lower end portion of the needle bar; a rotary member provided coaxially with the needle bar and freely rotatable about an axis thereof; a bobbin having a string-shaped material wound thereon; a guide member mounted to the rotary member for guiding the string-shaped material, paid out from the bobbin, to a needle drop position of the sewing needle, and which is constructed to sew the string-shaped material onto a sewing workpiece by lock stitching while not only controlling rotation of the rotary member in accordance with a moving direction of a sewing workpiece held on an embroidery frame that moves on and along a machine table on the basis of embroidery data but also changing an orientation of the guide member in such a manner as to optimize a direction in which the string-shaped material is to be guided to the needle drop position; a support member for supporting the bobbin, the support member being rotatable generally about an axis of the needle bar and causing the bobbin to revolve around the axis of the needle bar in response to rotation of said support member; and a drive section for rotating said support member, the drive section being a drive source independent of a drive source for said rotary member, wherein said support member is disposed over the embroidery frame at a predetermined lower position in such a manner that the support member at least does not hamper movement of the embroidery frame, and wherein said support member has an opening portion formed therein to permit passage therethrough of the needle bar over a predetermined area including a center of rotation thereof so that said bobbin is mounted on the support member outside the opening portion.