Method for Bottom Thread Residual Detection
A bottom thread and allowance technology, applied in the field of sewing, can solve the original intention of not being able to detect the bottom thread, etc., to avoid rework or stitch removal, and to achieve high judgment accuracy.
Active Publication Date: 2022-03-22
JACK SEWING MASCH CO LTD
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Problems solved by technology
[0004] The detection method of the bobbin thread remaining can realize the detection of the bobbin thread remaining, and then when the sewing machine is sewing the product, the alarm prompts that the bobbin thread is gone, the user can only replace the bobbin connection for mechanical sewing, or remove the previously sewn thread. It cannot achieve the original intention of bottom line detection
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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.
[0024] see figure 1 , the method for detecting the remaining amount of bobbin thread accor...
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The method for detecting the remaining amount of bobbin thread claimed in the present invention includes the following steps: a), setting the stitch distance A of the machine needle, and the remaining bobbin thread amount B when the bobbin thread detection sensor detects the signal and sends it to the electronic control, And calculate the number of stitches P=B / A that can be sewed by the amount of remaining thread B; b), record the number of stitches C sewn in the setting interval and the number E of sewing units D, and calculate a sewing unit Needle number Q=C / E required by D; c), judge whether the amount of remaining thread B can complete the sewing of one sewing unit D, if not, an alarm will be issued, otherwise no alarm will be issued. The present invention can predict the remaining threads of the bottom thread in advance, avoid rework or thread removal caused by the prompt that the bottom thread is gone in the middle of sewing, and then achieve the original purpose of bottom thread detection.
Description
technical field [0001] The invention belongs to the technical field of sewing, in particular to a method for detecting the remaining amount of the bottom thread. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the fabric to interweave or sew one or more layers of fabric. Wherein when sewing machine is sewing fabric, the rotary hook of sewing machine and machine needle cooperate with each other to interweave bottom thread and upper thread and interlock and sew on fabric, thereby form seam. The upper thread is passed through the needle eye of the machine needle, and the machine needle moves up and down; the rotary hook is composed of a bobbin case and a bobbin, the bobbin is accommodated in the bobbin case, and the bottom thread is wound on the bobbin. The upper thread is generally longer, 3000m-4000m, and the user can observe the amount of upper thread at any time during the sewing process, so t...
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IPC IPC(8): D05B59/02
CPCD05B59/02D05D2205/12
Inventor 许君辉洪志敏林晓晓管杨仁蔡敏华
Owner JACK SEWING MASCH CO LTD