Nsd Corporation

Mitsuhiro Fujiura

Hirotsugu Uenishi

Yoshichika Takizawa

Masayoshi Ono

Tatsuhiro Kurashima

Teruo Nakanishi

To provide a sewing machine that can control tension on a needle thread and tension on a bobbin thread on a per-stitch basis; that enables even heads of a multi-head embroidery sewing machine to form an identical embroidery; and that enables even a plurality of sewing machines to form identical embroidery. A memory device stores for each stitch of embroidery data a needle thread control torque value and a bobbin thread control torque value. In a needle thread torque control zone, an upstream grip section main body is closed, and a downstream grip section main body is opened. A needle thread motor is subjected to torque control in accordance with the needle thread control torque value. In the meantime, in a position control zone, the upstream grip section body is opened, and the downstream grip section body is closed, thereby subjecting the needle thread motor to position control.

Sewing machine

Each of front-back direction actuation blocks for actuating a sewing frame in a front-back direction has ball screws, motors, and movable members. An engagement roller of each of the movable members engages with a long side of the sewing frame, and an engagement roller of each of the movable members engages with a long side. The movable members of respective front-back direction actuation blocks are connected to short sides of the sewing frame. In each of the front-back direction actuation blocks, the ball screw and the ball screw are joined together by means of a joint member. Movable members of respective right-left direction actuation blocks support the respective front-back direction actuation blocks.

Growing community of inventors

Nagoya, Japan

Mitsuhiro Fujiura