Middle presser foot device of sewing machine

A sewing machine and presser foot technology, which is applied to the sewing machine control device, sewing machine components, program-controlled sewing machines, etc., can solve problems such as poor sewing, and achieve the effect of preventing poor sewing and preventing excessive load from being applied.

Active Publication Date: 2013-06-19
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the sewing product may be tightened by the intermediate presser foot 75, and the stitches may be raised by sewing the tightened sewing position, resulting in poor sewing.

Method used

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  • Middle presser foot device of sewing machine
  • Middle presser foot device of sewing machine
  • Middle presser foot device of sewing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Below, refer to Figure 1 to Figure 5 , one embodiment of the intermediate presser device of the sewing machine according to the present invention will be described.

[0034] like Figure 1 to Figure 3 As shown, the intermediate presser device 1 according to this embodiment is connected to a sewing machine main shaft 3 for moving up and down a needle bar (not shown) with sewing needles attached to its lower end. Among them, by the rotation of the sewing machine main shaft 3 driven by the main shaft motor 5, the non-illustrated sewing product is pressed against the intermediate presser foot 6 on the needle plate, and moves up and down synchronously with the up and down movement of the sewing needle.

[0035] An eccentric cam 8 is fixed on the sewing machine main shaft 3, and the eccentric cam 8 is connected with a connecting rod 9. The connecting link 9 is connected to the swing shaft holding part 10 , and the swing shaft holding part 10 is connected to one end part of...

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PUM

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Abstract

A center presser foot of a sewing machine is provided to prevent over-load on a main shaft of the sewing machine by adjusting a height location of the center presser foot from height of a need plate. A center presser foot of a sewing machine includes a control unit(55). The control unit is performed by the following steps of: dropping the center presser foot(6) according to an initial output value; pressing a sewn material strongly; comparing the initial output value with a real output value; modifying an output value of a height controlling motor(52); and adjusting a height location of the center presser foot by dropping the foot based on the modified output value.

Description

technical field [0001] The invention relates to an intermediate presser foot device of a sewing machine, which can adjust the height position of the bottom dead center of the intermediate presser foot from a needle plate. Background technique [0002] Currently, in a sewing machine that sews while conveying and holding a sewn product held on a cloth holding frame, when sewing near the middle of the frame body of the cloth holding frame, due to the The pressing of the fabric is not sufficient, so the middle presser device is used, which presses the sewing object near the sewing needle to the needle plate while the sewing needle is piercing the sewing object. [0003] An example of the middle presser foot device of the existing sewing machine is as Image 6 As shown, in the existing intermediate presser foot device 71, the intermediate presser foot 75 is installed at the lower end of the intermediate presser foot bar 73 supported on the intermediate presser foot rod holding pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B29/02D05B19/12
CPCD05B19/16D05B29/02D05B29/08D05B69/30
Inventor 桥口俊一
Owner JUKI CORP
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