Sewing thread turn sewing method for sewing machine

Abstract

The invention relates to a sewing thread turn sewing method for a sewing machine. Upper machine needles are arranged on the sewing machine corresponding to the upper end of a needle plate, and lower shuttle needles are arranged corresponding to the lower end of the needle plate. A coil pushing unit is arranged at the lower end of the needle plate, and the coil push unit acts to push coils formed by needle threads of the upper machine needles off original forming positions in the moving travel of at least one needle before turning and when the upper machine needles are about to rise after moving downwards, so that the lower shuttle needles cannot penetrate the coils formed by the upper machine needles, and the upper machine needle threads and lower shuttle needle threads form a disconnected stitching skipping state; accordingly, a reserved thread section is provided for a next travel and is used for providing the rope of the required length during the turn sewing, a work-piece has turn sown threads, and the variability and the value of sown products are increased.

Description

technical field [0001] The present invention relates to a sewing method for turning the sewing thread of a sewing machine, in particular to a sewing thread turning method that can be applied to a general sanben sewing machine or an overlock sewing machine, so as to make use of skipping stitch technology to produce available The turning conditions and the required line segments make the workpiece have turning sewing lines. Background technique [0002] Common three cars, please refer to Figure 10 ~ Figure 11 As shown in the existing structural schematic diagram, the upper end of the corresponding needle plate (not shown) is provided with the upper needle 32, and the lower end of the corresponding needle plate is provided with the lower shuttle needle 33, so that the three vehicles can be used at the same time. During the sewing process, when the upper needle 32 passes through the fabric and starts to rise, the needle thread 321 of the upper needle 32 will form a loop 322, an...

AI Technical Summary

Problems solved by technology

[0004] The above two types of sewing machines all adopt the above-mentioned operation process in linear sewing, but because the design and requirements for tailors tend to be variable, such as leaving decorative lines on the surface of the fabric, there are many kinds of sewing machines. Sewing technology, such as multiple overlapping seams, turning and other technical changes, and in terms of turning, because the design of the sewing machine is continuous link sewing, such as Figure 15 As shown, according to the above-mentioned known sewing machine methods, most of them sew a straight line and cut the suture, then move the fabric and turn it to the overlapping position B at the end of the suture, and then continue to sew, and then according to the number of turns and angles Repeat the steps of cutting and overlapping sewing. In this way, the turning pattern sewn will have many thread tails C, which is not beautiful, and it is also time-consuming and wasteful of sewing threads

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