Brother Kogyo Kabushiki-Kaisha

Hirose Manufacturing Co., Ltd.

Motonari Nakano

Yoshihisa Nozaki

Koichi Harada

Koichi Akahane

Takashi Kondo

Akira Nishio

Kazushi Inoue

Minoru Yamaguchi

Masatsugu Mizuno

Tomoyuki Fujita

Hitomi Ori

Syoichi Kunieda

Jun Hatanaka

Norikazu Hayakawa

Takeo Wataya

Michiko Uno

Masahiro Fukushima

A sewing machine with multiple needles employs, for each needle, a needle bar guide in the shape of the letter &ldquo;c&rdquo; and cooperates with a projection. The needle bar guide holds a needle bar by passing the needle bar through holes formed at upper and lower positions of the needle bar guide. Therefore, when the projection is rotated in a boss, the needle bar guide is also rotated, and the end of the needle is oscillated. When the projection is moved back and forth in the boss, the end of the needle is also moved in the same manner. Consequently, a deviation in the relative position between a needle and a rotary hook caused by a slight difference in machining and assembly accuracy can be adjusted for every needle.

Sewing machine with multiple needles

A sewing machine includes a sewing machine motor, a main shaft driven by the sewing machine motor, a sewing needle driven by the main shaft, a shuttle for capturing a thread loop in cooperation with the sewing needle, the shuttle having a hook shaft, a shuttle driving motor for driving the hook shaft of the shuttle independent of the sewing machine motor, a drive control device for controlling the sewing machine motor and shuttle driving motor so that the shuttle is rotated in synchronism with the main shaft, a thread jamming detecting device for detecting a thread jamming in the shuttle, and a releasing device for controlling the shuttle driving motor so that the shuttle is released from the thread jamming, when the thread jamming is detected by the thread jamming detecting device.

Sewing machine with improved shuttle drive control

A sewing system including a stitch-forming device including at least one sewing needle, for forming stitches on at least one workpiece; a feeding device which feeds at least one of the stitch-forming device and the workpiece relative to the other of the stitch-forming device and the workpiece along a reference plane; a control device which controls, according to at least one set of sewing data corresponding to at least one sewing pattern including a plurality of stitches, the stitch-forming device and the feeding device to form the stitches of the sewing pattern on the workpiece; a dimension-data memory which stores a plurality of sets of dimension data which correspond to a plurality of dimensions, respectively, each of which relates to the set of sewing data; and a selecting device which is operable for selecting one of the sets of dimension data stored in the dimension-data memory.

Electronically controlled sewing system

An oscillating shuttle, including a shuttle race having a substantially annular guide groove including two end portions opposed to each other in a circumferential direction thereof, a shuttle body which includes a part-annular guided portion and a hook portion and which is oscillatory while the guided portion is guided by the guide groove, a driver which rotates the shuttle body about an axis line, wherein when the hook portion hooks a thread loop, the shuttle body is rotated by the driver in one of opposite directions such that the tail portion passes through one of the two end portions of the guide groove and enters an upper opening of the shuttle race and, when the shuttle body is rotated back in the other direction, a tail portion of the guided portion enters the one end portion of the guide groove, and at least one of the one end portion of the guide groove which has, in a direction parallel to the axis line, a width greater than a width of a remaining portion of the guide groove, and the tail portion of the guided portion which has, in a direction parallel to the axis line, a width smaller than a width of a remaining portion of the guided portion.

Oscillating shuttle of sewing machine

A sewing machine, with independently driven main shaft and loop taker, stores a table containing preset speed correction values for negating rotational speed variations in the loop taker drive shaft caused by torque variations on the same; sets speed correction amounts based on speed correction values read from the speed correction value table; and outputs correction drive signals indicative of those speed correction values to the loop taker drive motor.

Sewing machine with a speed correcting unit and an independently driven

A needle-bar driving device of a sewing machine, for oscillating a needle bar supporting at a lower end thereof a sewing needle, in the axial direction of the needle bar, including a dead-position changing apparatus for changing at least one of an upper and a lower dead position of the needle bar.

Needle-bar driving device

Growing community of inventors

Ichinomiya, Japan

Motonari Nakano