Tokai Kogyo Mishin Kabushiki Kaisha

Tokai Industrial Sewing Machine Co., Ltd.

Minao Fukuoka

Ikuo Tajima

Takashi Ito

Satoru Suzuki

Terutada Kojima

Tomoaki Anesaki

A sewing machine includes a sewing head having a sewing needle to be vertically reciprocally driven, and a shuttle base having a shuttle to be rotatably driven in synchronism with the vertical movement of the sewing needle for forming stitches. A machine frame includes a pair of support posts spaced laterally from each other, an upper frame having greater rigidness for mounting the sewing head thereon, and a lower frame having greater rigidness and disposed below the upper frame for mounting the shuttle base thereon. Each of the upper frame and the lower frame extends between the pair of support posts and is fixed thereto.

Sewing machine

Disclosed is a multi-head sewing machine having an improved structure for driving a main shaft and a lower shaft for driving needle bars and thread take-up levers so as to prevent distortion of these shafts, in turn, variation of stitch performance in the respective heads from occurring. The sewing machine comprises a plurality of heads, having at least a needle bar and a thread take-up lever, arranged in a row; a plurality of shuttle holders corresponding to the number of heads, each supporting therein a shuttle, arranged in a row; a main shaft, penetrating the row of heads, which rotates to drive the needle bar and the thread take-up lever in each head; and a lower shaft, penetrating the row of shuttle holders, which rotates to drive the shuttle in each shuttle holder; wherein the sewing machine further comprises a drive shaft, extended parallel to the main shaft, which is rotationally driven by a drive motor, the rotational driving force of the drive shaft being adapted to be transmitted to the main shaft at more than one position.

Multi-head sewing machine

In an embroidery machine according to the present invention, at least one of driving mechanisms required for embroidery sewing has a driving source independent of the other driving mechanisms, and a control device is provided to control the driving source and those of the other driving mechanisms to be synchronously driven. With this construction, as for the driving mechanism having the independent driving source, since an interlocking mechanism can be omitted, the construction can be simplified, so that vibrations or noises can be reduced. Further with a control signal from the control device, a timing of operation of the driving mechanism having the independent drive source can be freely determined according to the embroidery mode.

Growing community of inventors

Kasugai, Japan

Minao Fukuoka