Tokai Kogyo Mishin Kabushiki Kaisha

Takuya Okamoto

Satoru Suzuki

Isao Ohashi

Sewing workpiece is set on a holding frame in such a manner that a predetermined sewing reference line of the sewing workpiece forms an inclination of a given angle &#x3b4; relative to a plane perpendicular to a rotation axis of the holding frame. Desired sewing pattern data are corrected in accordance with a predetermined correction function with the given angle &#x3b4; as a variable. Sewing is performed onto the sewing workpiece by the holding frame being relatively rotated and linearly moved in accordance with the corrected sewing pattern data. Thus, a desired pattern corresponding to the sewing pattern data can be sewn onto the workpiece in generally parallel relation to the predetermined sewing reference line.

Sewing machine, data creation apparatus and embroidery method for sewing on curved surface

Bobbin case containing a lower thread bobbin mounted in a rotary hook of a sewing machine is exchanged for a new bobbin case by the bobbin case being transferred between the rotary hook and a bobbin stock section provided apart from the rotary hook. Transfer mechanism reciprocatively transfers a bobbin grasping device, grasping a bobbin case at a distal end portion of a chuck section, between the rotary hook and the bobbin stock section. In a predetermined position of a transfer stroke of the bobbin grasping device, an orientation change mechanism changes the orientation of the chuck section, being transferred toward the rotary hook, so that the chuck section faces toward the rotary hook, and changes the orientation of the chuck section of the bobbin grasping device, being transferred toward the bobbin stock section, so that the chuck section faces toward the bobbin stock section.

Growing community of inventors

Komaki, Japan

Takuya Okamoto