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Buttonhole sewing machine

A buttonhole and sewing machine technology, applied to sewing machine components, sewing machine needle holders, program-controlled sewing machines, etc., can solve problems such as troubles, and achieve the effect of less lead-out, high degree of freedom, and reduced waste

Inactive Publication Date: 2008-02-06
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, since the bobbin thread cutting device is fixed on the cloth feeding table, if the length of the buttonhole stitches changes, it is necessary to adjust or replace the positions of the parts constituting the bobbin thread cutting device, which is very troublesome.

Method used

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  • Buttonhole sewing machine
  • Buttonhole sewing machine
  • Buttonhole sewing machine

Examples

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Embodiment Construction

[0059] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0060] A buttonhole sewing machine 10 (hereinafter, simply referred to as the sewing machine 10 ) of the present invention shown in FIG. 1 is an automatically controlled sewing machine that performs buttonhole locking with chain stitches. Sewing machine 10, which can form various buttonhole stitches by selecting patterns. Here, the overlock stitch W is formed around the buttonhole H composed of the drop-shaped round eye portion h1 and the straight line portion h2 shown in FIG. 9( b ), for example. The overlock stitch W is composed of a right side seam w1, a round eye seam w2 around the round eye h1, a left side seam w3, and a straight backtack seam w4.

[0061] The sewing machine 10 of Fig. 1 mainly has: a substantially rectangular box-shaped base portion 12, a vertical body portion 14a rising from the rear portion of the base portion 12, and a vertical body ...

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PUM

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Abstract

To surely perform sewing to a next buttonholing stitch by holding / cutting a lower thread so that the length of the end of the thread can be shortened as little as possible. In a sewing machine 10 for buttonholing provided with a fabric feed stage 13, looper base 31, needle plate 32 having a needle hole 32b, turning mechanism 15 for turning the looper base 31, lower thread cutter 30 for cutting the lower thread after the end of sewing, and lower thread holding means for holding the lower thread to be cut, the lower thread holding means is composed of a lower thread guiding face 32f of the needle plate 32 and a lower thread pressing member 27, and the lower thread is cut closely to the lower thread holding means. On the needle plate 32, an opening part 32c is provided while being opened in one direction continuously from the needle hole 32b. Further, a guide means composed of the turning mechanism 15 and the fabric feed stage 13 is provided for guiding the lower thread so that the lower thread can be led out of the opening part 32c and held by the lower thread holding means after the end of sewing.

Description

technical field [0001] The present invention relates to a buttonhole sewing machine for forming buttonhole stitches by chain sewing, and more particularly to the cutting and holding of the lower thread. Background technique [0002] Conventionally, a buttonhole sewing machine is known in which a buttonhole is formed by starting operation of the sewing machine, and a buttonhole stitch is formed around the buttonhole by chain sewing. In such a buttonhole sewing machine, the needle on which the upper thread is threaded moves up and down and swings, while the hook on which the lower thread is threaded moves, and the stitches are formed around the buttonhole by the coordinated action of both. [0003] In the buttonhole sewing machine, as described in Japanese Patent Application Publication No. 9-225166, after the overlock stitch is formed, the bobbin thread (hook thread) connected between the hook and the processed fabric is cut off and the side of the hook is cut off. The threa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B65/06D05B3/06D05B65/02D05B3/08D05B19/12
CPCD05B3/02D05B3/08D05B19/14D05B55/14D05B65/02D05B65/06D05B69/30
Inventor 坂井克秋
Owner JUKI CORP