Empty ring sewing up method and empty ring sewing up device of sewing machine

Abstract

A miss loop sewing-in method and miss loop sewing-in device for a sewing machine, makes that a miss loop end absorbed into the suction pipe of a miss loop disconnecting means to cut performs blow-return movement between the cloth terminal cut-off knife through needles for sewing machine. Under the action of the auxiliary air flow sprayed out from the rear lateral position to the inclined front side relative to the blow-return movement track of the miss loop, the miss loop end of the blow-return movement moves to a miss loop holding device side provided at the near side of a needle location section to be held by the miss loop holding device, therefore the invention not only can simplify the structure without impeding the operations and resulting in visual impairment, but also can reliably and successfully sew the miss loop into the stitch of a sewing start end of a next sewing material.

Description

technical field [0001] The present invention relates to a method for sewing an empty loop (Japanese: empty loop) in a sewing machine suitable for sewing cuffs and armpit side seams of knitted T-shirts, outerwear, underwear, etc., and side seams of leggings and shorts, etc. Empty loop sewing device, in particular, it relates to an empty loop formed by a stitch forming claw connected to a needle plate at the end of sewing of a sewing material, and is guided to be sewn into the sewing material as the sewing of the next sewing material starts The invention relates to an empty loop sewing method and an empty loop sewing device for a sewing machine which prevents thread slippage at the sewing start end in stitches at the sewing start end, that is, by performing back stitching. Background technique [0002] As this kind of empty ring sewing device, in the past, for example, the structure described in Japanese Patent No. 3567274 is known, and a kind of empty ring that can freely rec...

AI Technical Summary

Problems solved by technology

Therefore, when the needle 15 moves up and down with the start of the next sewing, the needle thread 17 generates tension that sometimes pulls the part 12a of the empty loop 12 moved to the right side of the needle drop 14 back to the needle drop. 14 side, in this state, once the machine needle 15 descends, the machine needle 15 will pass through the empty loop part 12a in the pulled back state to form a stitch, thus as Figure 13 As shown, the empty ring portion 12a is not sewn into the seam 19 of the sewing material 18, but remains protrudingly in the shape of a ball on the front edge 18e of the sewing start end of the sewing material 18, resulting in poor sewing.

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