Sewing quality control in sewing machine

A sewing machine and sewing technology, applied in the direction of sewing machine components, sewing machine needle seats, sewing machine metering devices, etc., can solve problems such as defective products, unavailable inspection of defective products, evaluation of thread tightness, etc., and achieve the effect of improving sewing quality

Active Publication Date: 2017-11-28
TISM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in Patent Documents 1 to 3, etc., the thread tightness of the sewn product is not actually evaluated.
In addition, even in Non-Patent Document 1, the relationship between the sewing tightness and the needle thread tension is only analyzed, and it is not actually determined whether the thread tightness of the sewn product is good or n

Method used

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  • Sewing quality control in sewing machine
  • Sewing quality control in sewing machine
  • Sewing quality control in sewing machine

Examples

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Embodiment Construction

[0021] figure 1 It is a block diagram schematically showing the system configuration of the embroidery sewing machine 10 according to one embodiment of the present invention. The mechanical structure of the embroidery sewing machine 10 may be any known structure such as a pattern sewing machine, and the illustration of the mechanical structure is omitted. The embroidery sewing machine 10 may be, for example, a single-head embroidery sewing machine having only one sewing head, or a multi-head embroidery sewing machine having a plurality of sewing heads. As known, this embroidery sewing machine 10 has a sewing machine main shaft that is rotationally driven by a sewing machine main shaft driving mechanism 11, and drives needle bars (not shown) of each sewing head up and down in accordance with the rotation of the sewing machine main shaft, thereby making The upper thread attached to the needle bar and the lower thread provided on the lower thread hook are intertwined to sew the ...

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Abstract

The present invention relates to a sewing machine which evaluates sewing quality using a thread tightening index. During a sewing operation, an upper thread used length (U) used for each stitch is detected, and a thread tightening index (Ks) for each sewn stitch is calculated on the basis of a stitch length (M) for each stitch, defined in accordance with sewing pattern data, a fabric thickness (t) of the object being sewn, and the detected upper thread used length (U) data. A report (for example a display of the thread tightening index Ks) corresponding to the thread tightening index (Ks) calculated for each sewn stitch is issued. By comparing the thread tightening index (Ks) calculated for each sewn stitch with a reference value (Kref), the acceptability of the thread tightness for each sewn stitch can be assessed, and the assessment results can be reported.

Description

technical field [0001] The present invention relates to a sewing machine for T-stitching and embroidering an object to be sewn by winding an upper thread and a lower thread, in particular to a sewing machine capable of evaluating the tightness of the thread after sewing so as to perform quality control of the finished product A sewing machine, and also relates to a method and a program for sewing quality management. Background technique [0002] During sewing, the sewing state changes according to how to adjust the tension of the upper and lower threads. In particular, if the tension of the upper thread is too high, the lower thread will be pulled out on the fabric, and if the tension of the upper thread is too small, the tightness of the thread will become poor, resulting in poor-looking stitches. Therefore, currently, the sewing operation is performed while adjusting the needle thread tension. For example, the following patent document 1 discloses a technology that detec...

Claims

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Application Information

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IPC IPC(8): D05B45/00
CPCD05B45/00D05B19/12D05B47/00D05B55/00
Inventor 大桥功中村公一泷泽义知小野政义上西浩嗣
Owner TISM CO LTD
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