DEVICE OF REPLACEMENT OF NEEDLE BARS IN SEWING MACHINE Russian patent published in 2014 - IPC D05B55/00 

FIELD: textiles, paper.

SUBSTANCE: invention relates to a needle bar mechanism mounted in the sewing head of the sewing machine, particularly to a device of replacement of needle bars, which enables to replace the needle bars from one to another in the same sewing head without changing the basic point of the like sewing head. The device of replacement of the needle bar of the sewing machine comprises a needle bar housing with a plurality of openings for the needle bars located in it, in each of which the needle bar enters and on one side of each of which there is at least one longitudinal sliding guide; in the holder of the needle bar housing, which is located on one side of the needle bar housing, there is a control guide track which engages with the needle bars and which has a longitudinal opening; the needle guide engages with one of the needle bars, which is moved to the sewing position for alignment with the longitudinal opening and moves with the transitional link of the sewing machine to move up and down synchronously with the engaged needle bar; and also the drive mechanism for moving and then retaining the selected needle bar in the sewing position. The control guide track prevents axial movement of all the other needle bars that are not in the sewing position.

EFFECT: improvement of the device.

11 cl, 26 dwg