Sewing Quality Control of Sewing Machine
A sewing machine and sewing technology, which is applied to sewing machine components, sewing machine needle holders, sewing machine metering devices, etc., can solve problems such as defective products, inability to inspect defective products, and evaluation of the tightness of unfinished threads, and achieve the effect of improving sewing quality.
Active Publication Date: 2021-01-15
TISM CO LTD +1
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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 not.
In particular, when the upper thread replenishment fails due to the shuttle, the stitches may skip and cause bad stitches, or if the upper thread and lower thread breaks occur and the thread breakage is ignored, it will become a defective product.
But, in prior art, can't carry out the inspection of this kind of bad stitches or defective products
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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[0021]figure 1 It is a block diagram schematically showing the system configuration of the embroidery sewing machine 10 according to an 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, the embroidery sewing machine 10 has a sewing machine main shaft that is rotationally driven by a sewing machine main shaft driving mechanism 11, and the needle bars (not shown) of each sewing machine head are driven up and down according to 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 bobbin are entangled with each o...
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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A sewing machine that evaluates sewing quality by thread tightness index. During the sewing operation, the used upper thread length (U) of each stitch is detected, and based on the stitch length (M) of each stitch specified by the sewing pattern data, the stitches to be sewn Calculate the thread tightness index (Ks) of each stitch of the finished product based on the detection data of the fabric thickness (t) and the length of the upper thread (U). Notification (for example, display of the thread tightness index Ks) corresponding to the calculated thread tightness index (Ks) for each stitch of the sewn product is performed. Comparing the calculated thread tightness index (Ks) per stitch of the finished product with the reference value (Kref), it is possible to judge whether the tightness of each stitch of the finished product is good or not and to evaluate the result of the judgment. To inform.
Description
Technical field[0001]The present invention relates to a sewing machine that winds an upper thread and a lower thread to perform T-sew and embroidery on a sewn product, and particularly relates to the quality control of the finished product by evaluating the tightness of the thread after sewing Sewing machine, and also involves methods and procedures for sewing quality management.Background technique[0002]In sewing, the sewing state changes according to how to adjust the tension of the upper thread and the lower thread. In particular, if the tension of the upper thread is too high, the lower thread will be pulled out on the fabric. If the tension of the upper thread is too small, the tightness of the thread will become worse, resulting in a poor-looking stitch. Therefore, currently, sewing is performed while adjusting the needle thread tension. For example, the following Patent Document 1 discloses a technology that detects the needle thread tension using a needle thread tension sens...
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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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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
OwnerTISM CO LTD