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Semi-rotary kettles for sewing machines and sewing machines

A semi-rotary, sewing machine technology, applied in the direction of sewing machine components, sewing equipment, cloth feeding mechanism, etc., can solve the problems such as the deterioration of the tension balance of the lower suture, the easy weakening of the tension of the upper suture, and the decline of sewing quality, so as to achieve a relaxation line The influence of traces, the improvement of sewing quality, and the effect of improving sewing quality

Active Publication Date: 2016-01-13
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, there is a problem that the tension of the upper thread is easily weakened, the tension balance of the lower thread is deteriorated, and adverse effects such as loose stitches are likely to occur, which easily leads to a decrease in sewing quality.

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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  • Semi-rotary kettles for sewing machines and sewing machines
  • Semi-rotary kettles for sewing machines and sewing machines
  • Semi-rotary kettles for sewing machines and sewing machines

Examples

Experimental program
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Effect test

no. 1 approach

[0073] according to Figure 1 to Figure 14 , the first embodiment of the present invention will be described.

[0074] Here, the direction in which the sewing needle 11 described later moves up and down is defined as the Z-axis direction or the up-and-down direction, and a direction perpendicular thereto is defined as the X-axis direction or the left-right direction. The direction orthogonal to both is defined as the Y-axis direction or the front-back direction.

[0075] In addition, the direction parallel to the Y-axis direction and relative to the needle bar 12 side of the upper shaft 22 described later is referred to as "front", and the direction parallel to the Y-axis direction and relative to the sewing machine motor 21 side of the upper shaft 22 is referred to as "front". For "after". In addition, let the left-hand side parallel to the X-axis direction and face the "rear" direction be "left", and let the right-hand side be "right" when it is parallel to the X-axis dire...

no. 2 approach

[0188] As a second embodiment of the present invention, a sewing machine having a new kettle mechanism 30A will be described. In addition, in the following description, the same code|symbol is attached|subjected to the same structure as the sewing machine 100 demonstrated as 1st Embodiment, and the description is abbreviate|omitted.

[0189] This kettle mechanism 30A is used to solve the problems caused by having the wire gathering mechanism 50 .

[0190] First, in the kettle mechanism 30 of the first embodiment, problems that may arise due to the thread gathering operation by the thread gathering mechanism 50 will be described.

[0191] The wire gathering part 51 of the wire gathering mechanism 50, as above-mentioned image 3 As shown in (A), the front end is far away from the pinhole 15 in front and is on standby. image 3 As shown in (B), the wire gathering member 51 rotates and moves backward in such a way that its front end passes directly under the needle hole 15 , so ...

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

The invention provides a half rotation shuttle for a sewing machine and a sewing machine to prevent the generation of hitch stitches and prevent residual lower threads from being drawing out. The half rotation shuttle comprises, a tip which captures upper threads while rotating forward; and a lower thread drawing unit which slidingly contacts with lower threads hung from a bobbin to a needle plate while rotating backward so as to draw the lower threads consumed by sewing. The lower thread drawing unit is forward-facing raised bars vertically arranged around the bobbin, and comprises a drawing addition tilting unit which tilts continuously upward from a drawing start to a maximum drawing position; a drawing reduction tilting unit which tilts continuously downward from the maximum drawing position to a minimum drawing position. According to the lower thread drawing unit, the maximum drawing position is configured such that the lower threads arrive the maximum drawing position before a thread pulling component starts to pull the threads, and the minimum drawing position is configured such that the lower threads arrive the minimum drawing position before the thread pulling component completes the pulling of the threads.

Description

technical field [0001] The invention relates to a semi-rotary kettle of a sewing machine for realizing ideal stitches and a sewing machine using the rotary kettle to realize ideal stitches. Background technique [0002] Among stitches formed by a sewing machine, there is a perfect stitch (Perfect stitch) in which upper and lower stitches are wound symmetrically to each other (see Figure 24 (A)), and only the upper suture is drawn in a spiral fashion (Hitchstitch) (see Figure 24 (B)). The ideal stitch can make the tension of the upper thread and the tension of the lower thread act on the fabric in balance with each other to form a good appearance, thereby providing a sewn product with high sewing quality. On the other hand, there is a problem that the tension of the upper thread is easily weakened, the tension balance of the lower thread is deteriorated, and adverse effects such as seam slack tend to occur, thereby easily leading to a decrease in sewing quality. [0003] A...

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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Patent Type & Authority Patents(China)
IPC IPC(8): D05B27/00
Inventor 皆川忠义奥井裕和
Owner JUKI CORP
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