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Double-thread lockstitch sewing machine with stitch prevention device

A technology of sewing machine and thread lock, which is applied in the direction of sewing machine components, sewing machine ring mechanism, sewing equipment, etc., and can solve the problem of poor retention of the end of the looper thread

Active Publication Date: 2020-10-23
YAMATO SEWING MASCH MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the following problems occur: when the sewing is finished, the cutting of the looper thread by the thread cutting device and the retention of the end of the cut looper thread appear to be defective, so that the next sewing process cannot be carried out as specified.

Method used

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  • Double-thread lockstitch sewing machine with stitch prevention device
  • Double-thread lockstitch sewing machine with stitch prevention device
  • Double-thread lockstitch sewing machine with stitch prevention device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0091] Embodiments of the present invention will be described below based on the drawings. In addition, in this embodiment, the same code|symbol is attached|subjected and demonstrated about the same structure as the double-thread overlock sewing machine which is the prior art of this applicant.

[0092] figure 1 It is a perspective view showing the overall appearance of the horizontal cylindrical double-thread lockstitch sewing machine according to the embodiment of the present invention in a state where the upper cover of the sewing machine base portion is removed, figure 2 yes figure 1 An enlarged perspective view of the main part of image 3 and Figure 4 It is a perspective view showing the structure of main parts of the stitch preventing device provided in the above-mentioned horizontal cylindrical double-thread overlock sewing machine, Figure 5 It is a plan view showing the structure of the main parts of the above-mentioned stitch preventing device, Figure 6 to...

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Abstract

The present invention provides a double-thread overlock sewing machine with a stitch-preventing device, which is equipped with a looper thread pull-back force applying device in addition to the stitch-preventing device for self-thread looping. The looper thread pull-back force applying device hooks the looper thread part suspended between the looper thread supply source device and the looper when the looper moves forward after the self-thread loops. And by moving it sideways, the looper thread portion is bent to apply a pulling force toward the looper thread supply source device side to the looper thread portion supplied to the looper. Therefore, according to the double-thread overlock sewing machine with the anti-stitch thread opening device of the present invention, the anti-thread opening effect of the self-thread winding can be obtained, and the cutting process of the looper thread after the self-thread winding and the after-cutting process will not be caused. If there is a problem with the retention of the looper thread, the next sewing can be performed reliably and with a good appearance according to the regulations.

Description

technical field [0001] The invention relates to a double-thread lockstitch sewing machine with an anti-stitch opening device, which mainly uses a double-thread lockstitch sewing machine represented by a horizontal cylinder, and forms the stitches of the double-thread lockstitch through a needle thread and a looper thread, and can This prevents the generation of split threads at the sewing end portion of the stitches of the double overlock stitch. Background technique [0002] In order to prevent the characteristic opening of the stitches formed by the double-thread overlock sewing machine as described above, the present applicant has successfully developed a belt disclosed in Japanese Patent Laid-Open No. 2011-206527 and Japanese Patent Laid-Open No. 2013-6009. The double-thread overlock sewing machine of anti-open thread device (hereinafter referred to as the applicant's prior art). [0003] Such as Figure 28 and Figure 29 As shown, the above-mentioned anti-thread preve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B1/10D05B63/00
CPCD05B1/10D05B63/00
Inventor 木下竜一郎
Owner YAMATO SEWING MASCH MFG CO LTD
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