Guiding and threading structure in an automatic threading device of an industrial sewing machine

Abstract

The invention provides a guiding and threading structure in an automatic threading device of an industrial sewing machine, which belongs to the technical field of sewing machines. The utility model solves the technical problems such as low threading automation degree of existing industrial sewing machines. The industrial sewing machine includes a casing, a side cover fixed at one end of the casing, a thread take-up lever, and a machine needle. The needle has a threading hole. The guiding and threading structure includes a rotating link, a driving member, a guide plate, and a threading link; One end of the rotating connecting rod is fixed with a clamping cylinder and a top line cylinder, and a clamping plate is fixed on the outer end of the output shaft of the clamping cylinder. The ejector rod facing the open groove; the rotating connecting rod and the guide plate are respectively arranged on both sides of the machine needle, and the threading connecting rod is slidably arranged on the guiding plate; the end of the threading connecting rod facing the machine needle is fixed with a deformable threading hook. The guiding and threading structure of the present invention greatly improves the automation degree of threading of existing industrial sewing machines.

Description

technical field [0001] The invention belongs to the technical field of sewing machines, and relates to an automatic threading device for an industrial sewing machine, in particular to a guiding and threading structure in the automatic threading device for an industrial sewing machine. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material; there is no automatic threading device on the current industrial sewing machine. In the event of thread breakage or needle breakage, manual threading is required, which is time-consuming and labor-intensive, especially causing great trouble to people with poor eyesight or the elderly. [0003] At present, some household sewing machines are equipped with automatic threading devices, such as some lockstitch sewing machines. Usually, the automatic threading devices on such sewing machines can...

AI Technical Summary

Problems solved by technology

[0006] In the threading device for sewing machines disclosed in the above-mentioned patent documents, the threading action still needs to be put into the thread hook groove by hand, and the degree of automation is relatively low.

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