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Sewing machine

A technology of sewing machine and machine needle, which is applied in the direction of sewing machine components, sewing equipment, mechanism of cutting thread in sewing machine, etc. It can solve the problem that the sewing machine cannot form stitches, etc., and achieve the effect of reliable limitation

Active Publication Date: 2013-10-30
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the length of the upper thread is long, the upper thread intersects with the lower thread in lumps at the beginning of the next sewing, therefore, the sewing machine cannot form a good stitch

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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Examples

Experimental program
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Effect test

Embodiment Construction

[0035] Embodiments of the present invention will be described. Directions (front and rear, left and right, and up and down) used in the following description are indicated by arrows in each figure.

[0036] Such as figure 1 , figure 2 As shown, the sewing machine 1 has a machine base 2 , a column 3 and a machine arm 4 . The stand 2 is a long rectangular parallelepiped in the left-right direction, and is attached to the table 15 from above. The pillar 3 extends upward from the right end of the base 2 . The machine arm 4 extends leftward from the top of the pillar 3 . The sewing machine 1 has a needle plate 5 , a pressing bar 6 , a needle bar 7 and a thread take-up bar 9 . The needle plate 5 is installed on the upper surface of the left end portion of the frame 2 . The press bar 6 and the needle bar 7 are supported on the left end portion of the machine arm 4 so as to be able to ascend and descend. The lower ends of the pressing bar 6 and the needle bar 7 protrude below ...

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PUM

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Abstract

The present invention provides a sewing machine. The sewing machine is provided with a thread cutting device which is used for cutting an upper thread and an under thread below a needle plate. The sewing machine of the invention is provided with a limiting component. When the thread cutting device operates, the limiting component limits rising and dropping of a thread hanging part. In the sewing process, the thread hanging part adjusts the leading-out length of the upper thread through dropping when a thread taking-up lever rises and rising when the thread taking-up lever drops. The thread taking-up lever rises and drops when the thread cutting device operates. The thread hanging part does not rise or drop under the function of the limiting component. Therefore, the thread cutting device cuts off the upper thread without effect by the position of the thread hanging part. The upper thread which is cut off can residue at the needle side with an approximately constant length. Therefore, the sewing machine can generate excellent stitch.

Description

technical field [0001] The present invention relates to a sewing machine with a thread cutting device for cutting the upper thread and the lower thread under the needle plate. Background technique [0002] The sewing machine forms stitches on the cloth on the needle plate by the action of the needle and the hook. The needle keeps the upper thread and rises and falls. The hook holds the lower thread and rotates under the needle plate. When the needle is lowered, the upper thread forms an upper thread loop under the needle plate. The hook catches the upper thread loop with the tip of the hook so that the upper and lower threads interlace. Stitches are formed by interlacing upper and lower threads. [0003] The sewing machine has a thread take-up lever and a thread clamping device, and the thread clamping device has a thread take-up spring. The upper thread passes through the thread clamping device, the thread hanging part of the thread take-up spring (Japanese: コ挂け部) and ...

Claims

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Application Information

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IPC IPC(8): D05B65/00D05B47/04
Inventor 中野元就
Owner BROTHER KOGYO KK
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