Button sewing method and sewing machine

Abstract

A button seam attaching method and a sewing machine thereof are provided. When a button-sewing step is finished, in the stage of before changing to the sinter fused step, a button holder and the button holded on the button holder are moved up and down relative to the cloth, the deflection of the button-sewing thread can be corrected simply and reasonably when switching the button-sewing posture to the sinter fused posture, products with good appearance and touching feel can be acquired.

Description

technical field [0001] The present invention relates to a button for sewing buttons on various sewing products using a sewing machine, such as front buttons for men's suits, women's jackets, and vests, buttons for inner pockets, buttons for back pockets of trousers, etc. Button sewing method and sewing machine for sewing buttons. Specifically, it involves threading a needle thread through each hole of a button under the up-and-down reciprocating motion of a needle linked with the main shaft of a sewing machine to sew the thread on the cloth, and then alternately drop the needle on both sides of the button thread to fix the button. A button sewing method and a sewing machine for fastening a button thread by twisting a knot. Background technique [0002] As mentioned above, in the sewing machine for sewing buttons, the buttoning action (process) of sewing the button on the cloth and the continuous knotting action (process) of entangling the button thread (process) are sequent...

AI Technical Summary

Problems solved by technology

[0003] However, when using the conventional button-attaching sewing machine disclosed in each of the above-mentioned publications, as shown in FIG. When the button B is switched to the knotting posture shown in Figure 10(B), specifically when the button B is transformed from the horizontal posture in Figure 10(A) to the vertical posture in Figure 10(B), it is located at the bottom. The side buttoning thread (actually the buttoning thread of the front and rear holes on the right side of the four-eye button B) RNa will loosen at the root, which will easily cause the entirety of the buttoning thread LN and RN to be skewed

In such a skewed state, as shown in FIG. 10(C), the knotting is performed between the two buttoning threads LN and RN, and the knotting thread BN is wound several times. At the base RNa of RN, the position of the button B sewn on to the fabric w is not stable while still maintaining a slanted posture, so there is a possibility that the button B is inclined to one side of the button line RN, etc., and the finished product may be damaged Problems with deterioration of appearance and touch feeling

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