Method for reducing thread using amount during thread shearing of overlock sewing machine

Abstract

The invention relates to a method for reducing a thread using amount during thread shearing of an overlock sewing machine. According to the method, after a work piece sewing procedure is finished, external force is applied to the platform of the overlock sewing machine, a tension adjusting knob which is assembled on the platform and used for clamping a fixed sewing thread is expanded and releases the sewing thread, and simultaneously, the sewing thread is pressed and limited by clutching force which is smaller than clamping force of the tension adjusting knob. Accordingly, due to the released sewing thread of the machine, the number of knotted meshes of a knotting chain behind a work piece is reduced, so that the using amount of cut tailing threads is reduced.

Description

technical field [0001] The invention relates to a method for saving the amount of thread used by an overlock sewing machine during thread trimming, especially a method for saving the length of thread trimming after sewing by an overlock sewing machine, so as to utilize loose thread and proper positioning Mechanism, to reduce the number of chain meshes, and indeed to shorten the amount of sutures that are cut off at the end of the thread. Background technique [0002] When you finish sewing the fabric and want to cut the overlock seam, refer to Figure 7 ~ Figure 9 As shown, it is necessary to continue the empty sewing state for a segment of the thread tail section L that is not sewn on the fabric, and move the sewn fabric to the suction port 32. At this time, the suction comes from the suction port 32 to generate suction toward the suction pipe. air, the empty sewing thread tail L that has not been sewn on the fabric is sucked into the suction pipe, and the thread tail L tha...

AI Technical Summary

Problems solved by technology

[0003] But this thread trimming device is because each suture in the sewing process is pressed and pulled by the tension adjustment button 31 of the machine head 3, and keeps the tension tightness of each suture, so when the sewing is finished, it will be cut. At the time of the thread, the thread end section L that continues to be in the empty sewing state for a certain distance will still form a tightly intertwined link mesh (see Figure 9 and attached photo 1), because the thread end section L of the link of an appropriate length is enough to allow the thread end of the link to be sucked into the cutter group 33 for cutting, relatively, it must consume several times the length of the sewing thread. The chain structure forms the required thread end section L, especially when the empty car is sewn, the sewing thread is in a free state due to the release of the elastic force, and the mesh of the chain is relatively tighter, resulting in more thread consumption , and the cut L part of the thread end will cause a lot of waste of sewing thread

Images