Thread tension device of sewing machine

A technology of sewing machine and sewing machine head, applied in the direction of sewing machine thread take-up device, sewing machine metering device, sewing machine components, etc., can solve problems such as poor sewing, cloth feeding obstacle, bulge, etc., and achieve the effect of improving the quality of finished products

Inactive Publication Date: 2008-05-21
YAMATO SEWING MASCH MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the above-mentioned traditional thread passing device is used when sewing this kind of gray cloth, the stitches formed by the thread and the bent thread will be wound on the claws of the needle plate and it is difficult to escape from the claws, which will hinder the feeding of the cloth. Easy to cause poor sewing
Also, even if the stitches come out of the claws, when the needle reaches the bottom dead center after passing through the gray cloth, the thread in a tense sta

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Thread tension device of sewing machine
  • Thread tension device of sewing machine
  • Thread tension device of sewing machine

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Embodiment Construction

[0027] Embodiments of the present invention described in claims 1 to 6 will be described below with reference to the drawings.

[0028] In Fig. 1~Fig. 3, 21 is the sewing machine head shell, and 22 is the sewing machine base plate. In these Fig. 1~Fig. Figure 9 The same members that have been described in , therefore, the corresponding parts and the arrows indicating the moving direction of the movable member are respectively marked with the same symbols, and the detailed description thereof is omitted.

[0029] In the inside of the sewing machine head housing 21, the drive main shaft 23 that makes the needle bar 3 reciprocate up and down through a well-known crank mechanism or the like is inserted and supported. The bobbin arm 25 is passed to move interlockingly with the bobbin 17 which becomes the vertical swing fulcrum of the bobbin threading handle 8 .

[0030] Set on the front part of the left and right middle position of the sewing machine head housing 21, the fixed th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

A thread passing unit for sewing machine has a path length regulator for feeding thread, which features that the path length formed by fixed thread path, movable thread path and the thread path on needle rod is set up to 1 for the upper dead point of needle rod and more than 1 for the lower dead point. As a result, when the needle rod is raised up or lowered down, the thread is in relaxation state to ensure sewing quality.

Description

technical field [0001] The present invention mainly relates to a thread passing device applicable to a multi-needle interlock sewing machine, in particular to such a thread passing device of a sewing machine, which consists of a needle bar thread path installed on the upper end of a needle bar that can swing back and forth in an up and down direction; The fixed thread path arranged next to the suture tension regulator; and the swing mechanism that is arranged between the fixed thread path and the needle bar thread path and synchronously interlocks with the up and down reciprocating motion of the needle bar in the up and down direction A movable thread passage on the end of the thread handle forms the thread feed path from the thread tension regulator to the machine needle. Background technique [0002] Fig. 7 is a perspective view showing the main structure of a thread passing device commonly used in a multi-needle interlock sewing machine. The thread passing device in the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D05B45/00D05B51/00D05B1/10D05B47/06D05B49/02
Inventor 岩井胜彦井上忠德草積要
Owner YAMATO SEWING MASCH MFG CO LTD
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