Cloth decoration edge forming device constituted from sawtooth stitch sewing machine

Abstract

PURPOSE: To allow a worker to easily, efficiently and stably sew uniform and beautiful pin-tucks regardless of its skill by improving the stability stitch balancing thread tension, the feeding stability of a sewing matter (cloth), and the visual confirmability of seams in sewing in the formation of pin-tucks by use of a zigzag lock stitch sewing machine. CONSTITUTION: A throat plate 11a comprises a hole 12a located between the lateral needle locating positions 20a and 20b of one needle and extended long in the feeding direction S of a sewing matter 13. A guide plate 10 for freely inserted to the hole 12a from the upper surface side of the throat plate 11a is formed on the lower surface of a presser 8. A feed dog 14a has a U-shaped sectional U-groove 15a in a position opposed to the hole 12a to work a feeding force to a pin-tuck part.

Description

technical field [0001] The present invention relates to an interlacing (interlacing; thread interlacing with other threads or other loops) with a bobbin thread of a horizontal hook at a left and right position corresponding to the width of the swing needle while swinging one needle from side to side. ) fabric decorative edge forming device composed of zigzag stitch sewing machine. Background technique [0002] Sewn products (cloths) sewn with pin tucks are in increasing demand due to their good stretchability and unique decorative properties. [0003] After turning over the sewn product (cloth), sewing along the turned-back portion and the opposite portion can be performed to form a cloth decorative edge. [0004] In addition, the fabric decorative edge is first formed by stitching, and then the sewn product (cloth) is heat-treated to form a fixed fabric decorative edge shape, and then the seam is removed to form a semi-permanent pleated fabric decoration. edge. If a larg...

AI Technical Summary

Problems solved by technology

That is, the sewing of using a lockstitch sewing machine is due to suitably turning over the sewn product (cloth) 3 at the position of the cloth decorative edge, and the operator manually performs sewing while conveying the turned-over portion, so there is a The operability and productivity are poor, and there is a problem that it is highly dependent on the skill level of the skilled person, and there is a problem that it is difficult to uniformly sew when sewing multiple rows (2 or more) of fabric decorative ribs, etc.

[0025] In addition, in Conventional Example 2, since the sewn matter (cloth) 3 is turned over, and the overlapping sewn matter (cloth) 3 near the folded portion is sewn with one upper thread and one lower thread, the cloth decoration The ribs form loops, so there is a problem that it is not possible to form a U-shaped fabric decorative rib, and it is impossible to perform stretched sewing with easy seam removal.

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