Bobbin thread winding method and winding device

Abstract

The invention discloses a bobbin thread winding method, which includes winding a first section of a bobbin thread on a bobbin thread winding column clockwise or counterclockwise, wherein the first section has a first preset length; pressing the tail end of the first section wound on the winding column; and continuously winding the bobbin thread on the winding column in the opposite direction until the winding cavity of the bobbin is fully wound with the bobbin thread. The winding method can realize bidirectional winding of the bobbin, and thus when the bobbin is used, whether the bobbin thread is about to run out can be judged by whether the rotating direction of the bobbin is changed; and through the first preset length of the first section, accurate bobbin thread allowance can be obtained, so as to facilitate subsequent operations, such as continuously sewing the needle number corresponding to the bobbin thread allowance or replacing a new full bobbin after cutting the bobbin thread. The invention further discloses a winding device, which can realize the winding method of the bobbin thread, of the bobbin thread.

Description

Technical field [0001] The invention relates to the technical field of sewing equipment, and more specifically, to a method for winding a bobbin bottom thread. In addition, the present invention also relates to a bobbin bottom thread winding device for implementing the above-mentioned bobbin bottom thread winding method. Background technique [0002] As an important part of the sewing machine, the bobbin mainly cooperates with the needle during sewing to interlock the bottom thread and the upper thread in the sewing material. [0003] Normally, the bottom thread is wound on the bobbin in one direction, that is, when winding, the bobbin rotates forward until the bobbin is fully wound, or the bobbin is reversed until the bobbin is fully wound. [0004] However, because the winding cavity of the bobbin is usually small and its thread capacity is limited, it is necessary to always judge whether the bobbin thread on the bobbin is about to run out, so as to avoid the occurrence of empty s...

AI Technical Summary

Problems solved by technology

[0004] However, because the winding chamber of the bobbin is usually small and its thread capacity is limited, it is often necessary to judge whether the bobbin thread on the bobbin is about to be used up, so as to avoid that when the bobbin thread is about to be used up, if the thread is still continued, resulting in an empty seam , causing damage to the fabric

[0005] In the prior art, it is usually judged whether the bobbin thread on the bobbin is about to be used up by detecting whether the winding post of the bobbin is exposed through a sensor. quantity

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