Chain manner stitch seam button sewing machine and button sewing method

Abstract

A chain manner stitch seam button sewing machine and button sewing method is provided to perform stable sewing of buttons, which is constituted by arranging a button holding mechanism (13) holding a button (B), a lower plate (40) for mounting the object (C) to be sewn, a moving mechanism relatively moving the button, the object to be sewn, and a sewing needle, a looper forming a loop by grasping the sewing thread, and a movement control means (80) driving and controlling a sewing machine (12) and the moving mechanism and carrying out buttoning sewing by the movement control of each section, by arranging an abutting section (43) positioning the distal end section of the folding line (L) of the cloth (C1) of a part of the folded object to be sewn in the lower plate, and by arranging a cloth pressing means (60) pressing the object to be sewn as it remains positioned. Then, the movement control means carries out the movement control alternately needing the front and back portions of the folding line of the object to be sewn.

Description

technical field [0001] The invention relates to a chain stitch button sewing machine and a button sewing method using the chain stitch button sewing machine. Background technique [0002] A conventional chain stitch button sewing machine, as described in Patent Document 1, for example, has a button holding mechanism for holding buttons under a needle that moves up and down, and holds a sewn object under the held buttons. The cloth holding mechanism, the button to be held, the cloth to be held and the moving mechanism for the relative movement of the needle. [0003] As shown in FIG. 8(A), the cloth holding mechanism of the above-mentioned sewing machine has a tongue (tongue) extending near the vertical movement path of the needle N from the front end of the flat plate almost perpendicular to the vertical movement direction of the needle N. ) G. [0004] Like a decorative button, when the button B is sewn to the sewn object C of the double-layered fabric in which the surfac...

AI Technical Summary

Problems solved by technology

[0006] However, since the above-mentioned conventional chain stitch button sewing machine needs to be set without forming stitches on the lining C2, it is difficult to set the hem portion of the fold L of the cloth surface C1 to pass through the sewing thread T deeply, and it is impossible to Do not pass the sewing thread shallower on the cloth surface C1 as shown in Fig. 8(A)

Therefore, the sewing strength of the button B is lowered, and the button B tends to fall off easily.

[0007] In addition, at this time, as shown in FIG. 8(B), the passing width H of the sewing thread T on the cloth surface C1 after the button is sewn is narrow, and the button B to be sewn is prone to slack on the sewn object C. However, a large tension is generated on the sewing thread T, and thus the disadvantage of tearing the cloth surface C1 occurs.

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