OVERLOCK SEWING MACHINE Russian patent published in 2013 - IPC D05B19/00 

FIELD: textiles, paper.

SUBSTANCE: machine has advanced technological capabilities with automatic changeover to different types of chain and overcasting stitches. For the first time, the overlock sewing machine performs zigzag stitches not only of two-thread chain stitch, but three-thread (two-thread) overcasting having less consumption of thread in comparison with the four-thread overcasting stitch. The machine additionally comprises the units of regulation of the width of the stitch and switching off the upper moving knife in the mechanism of cutting the edge of the material. In the upper looper mechanism the unit of its switching off is provided by actuation of the solenoid and opening the kinematic link between the driven lever and the shaft of the upper looper mechanism. In the mechanism of movement of the material the unit regulating the rods in height is mounted, actuated by the stepper motor. The presser foot mechanism comprises a sensor of registration of the presser foot position in height, and the stepper motor with a cam for regulation of the pressing force of the material by the presser foot. In the machine an automatic adjustment of the machine to the rational parameters of operation is provided, the self-learning methods are used due to which the diagnostic system has the ability of self-correction of the settings, when changing the conditions of the material processing.

EFFECT: machine has a single computerised control system of its operation, enabling to simplify its operation with the expansion of its technological capabilities.

7 cl, 10 dwg