Brother Kogyo Kabushiki-Kaisha

Akio Takahashi

Masaki Shimizu

Yasuhiko Kawaguchi

Yoshikazu Kurono

Hirokazu Hirose

Tetsuo Morita

Fumiaki Asano

Minoru Sakanobe

Mamoru Yasuda

A headgear holding apparatus including a base structure attached to a sewing machine such that the base structure is movable in a first direction, a rotatable structure supported by the base structure such that the rotatable structure is rotatable about a first axis line parallel to the first direction, a headgear holder which has a part-cylindrical outer surface for holding an inner surface of a headgear, the holder being detachably attached to the rotatable structure such that the part-cylindrical outer surface thereof is rotated when the rotatable structure is rotated, a headgear support member which is attached to the base structure, has a curved outer surface, and extends near a sewing position where a sewing needle of the sewing machine is reciprocated, the curved outer surface supporting the inner surface of the headgear when the holder is rotated, and two or more guide rollers attached to the base structure such that the rollers are provided on both sides of the headgear support member in a second direction perpendicular to the first direction, extend parallel to the first direction, and are rotatable about respective second axis lines parallel to the first axis line, the rollers being located at respective positions where an outer circumferential surface of a contact portion of each of the rollers contacts an inner surface of an intermediate annular portion of the headgear.

Headgear holding apparatus and process of forming an embroidery on

A sewing device including a head portion for mounting a needle; a support frame; and a bed unit supported on the frame and switchable between a usage position in confrontation with the head portion and a retracted position retracted away from the head portion compared with the usage position.

Sewing device with a bed switchable between a usage position and a

A sewing machine including a needle bar having a sewing needle, a spindle for driving the needle bar, a bed portion movable selectively to a using position or a retracted position, and a rotary hook housed in the bed portion. A stitch is formed by the cooperation of the sewing needle and the rotary hook. A rotary hook drive motor is provided in the bed portion for driving the rotary hook. A sensor is provided for detecting a position of the bed portion. The needle bar and the spindle is selectively disconnected from each other. If the bed portion is out of the using position, and this out position is detected by the sensor, the needle bar is released from the spindle for stopping the sewing needle. Further, in this case, the rotation of the rotary hook drive motor is also stopped.

Sewing machine having movable bed

A needle bar stopper is provided in a sewing machine having a main shaft and a needle bar which moves vertically upon reception of a driving force from the main shaft. The needle bar stopper comprises a transmission prohibiting unit, including a needle bar stopping solenoid, which prohibits transmission of the driving force from the main shaft to the needle bar and a braking unit, including a needle bar stopping solenoid, which applies a braking force to the needle bar when transmission of the driving force is prohibited by the transmission prohibiting unit. The needle bar stopper can stop the needle bar reliably by use of the braking unit.

Needle bar stopper for use in a sewing machine

An embroidery machine having a spindle, a sewing machine motor driving the spindle, and a thread cutting device including a thread cutting motor and a thread cutting mechanism provided with a movable blade driven by the thread cutting motor. The thread cutting motor is provided independently of the sewing machine motor and is driven so that the movable blade is moved in synchronism with the spindle. The movable blade is movable between a maximum pivot positioned farthest from a stationary blade and a stand-by position close to the stationary blade.

Sewing machine having thread cutting device

An embroidery machine having a plurality of beds and corresponding heads. In each of the heads, a plurality of needle bars supporting needles and thread take up levers are provided. Each bed contains a rotary hook drive motor provided independent of a sewing machine motor which drives a spindle extending through the heads. The rotary hook drive motor is driven in synchronization with the spindle for performing embroidery stitching, but is driven independently of the spindle at a specific rotation angle range thereof based on number of stitching. In each bed, a conventional needle thread holding mechanism is dispensed with. By controlling rotation of the rotary hook drive motor, a residual end part of the needle thread has a sufficient length capable of avoiding disengagement of the residual end part from an eyelet of the needle at a thread cutting operation.

Sewing machine having spindle drive motor and rotary hook drive motor

A sewing machine capable of cutting only a needle thread without cutting a bobbin thread during the middle of stitching operation for changing the needle thread with another needle thread. A thread cutting motor is driven independent of a sewing machine motor. A rotary hook control unit is provided for controlling rotation of a rotary hook as well as driving mode of the thread cutting motor in relation to a rotation of a spindle. A thread cutting mechanism including a movable blade pivotably driven by the thread cutting motor is provided between the rotary hook and a throat plate. If the movable blade is moved from its maximum pivot position to a stand-by position, both needle thread and bobbin thread are cut at the final number of stitch. If the movable blade is moved from a needle thread cutting position to the stand-by position, only the needle thread can be cut.

Sewing machine having thread cutting mechanism

A sewing machine including a needle bar for holding a sewing needle which conveys a sewing thread; a shaft member to which the needle bar is connected; a needle-bar drive motor which reciprocates the needle bar via the shaft member; a loop catcher which cooperates with the sewing needle to catch a loop of the sewing thread conveyed by the sewing needle; a catcher drive motor which rotates the loop catcher; an asynchronism detector which detects a first asynchronous state in which an amount of asynchronism between the needle bar and the loop catcher is greater than a first reference value and/or a second asynchronous state in which it is expected that the amount of asynchronism will be greater than a second reference value; and a holding device which holds, when the asynchronism detector detects the first and/or second asynchronous state, the needle bar and/or the loop catcher, at a holding position where the sewing needle and the loop catcher do not collide with each other.

Sewing machine

A control device for a cyclic sewing machine for controlling driving condition of a main shaft of a cyclically operated sewing machine. The control device includes a clutch mechanism provided between a driving source and a main shaft, a switching member for switching the clutch mechanism between a power cutoff condition, a low-speed drive condition and a high-speed drive condition, a control cam rotatable at a reduced speed in interlinked relation to the main shaft, and a lost-motion connecting means. When switch the sewing machine from the power cutoff condition to the low-speed condition, a lost-motion is produced between the operating member and the switching member. The control cam is rotated in response to rotation of the main shaft, the operating member and the switching member are moved in accordance with cam profile. The clutch mechanism and hence the main shaft are switched between the drive conditions based on the movement of the switching member.

Growing community of inventors

Gifu-ken, Japan

Akio Takahashi