Bottom thread detection device of sewing machine vertical rotating shuttle and detection method of bottom thread detection device

Abstract

The invention relates to a bottom thread detection device of a sewing machine vertical rotating shuttle and a detection method of a bottom thread detection device. The bottom thread detection device comprises a vertical rotating shuttle, a shuttle core arranged in the vertical rotating shuttle, a control processing module, a signal acquisition module and an alarm module, the signal acquisition module is used for detecting a thread circle placing number signal of the bottom thread when the rotating shuttle conducts sewing, and transmitting the thread circle placing number signal the control processing module, the control processing module transmits the received thread circle placing number signal to a bottom thread circle number counter inside the control processing module, a thread circle placing number preset value is preset on the bottom thread circle number counter, and every time the control processing module receives a thread circle placing number signal, the thread circle placing number preset value is subtracted by 1. Through the bottom thread detection device of the sewing machine vertical rotating shuttle and the detection method of the bottom thread, according to the change of shuttle core circle numbers in the sewing process, the phenomena that the bottom thread is about to run out and is broken or a starting needle does not hooks the thread can be timely and accurately detected, an operator is reminded to replace the shuttle core or repair a machine to eliminate abnormity, the problem of sewing missing caused when no bottom thread exists on sewed fabric is avoided, and the sewing quality is guaranteed.

Description

technical field [0001] The invention relates to the technical field of sewing machine equipment, in particular to a bottom thread detection device and a detection method of a vertical rotary hook of a sewing machine. Background technique [0002] When the sewing machine is sewing the fabric, the needle and the rotary hook of the sewing machine cooperate with each other to interweave the upper thread and the bottom thread on the fabric to form stitches. The upper thread is on the upper surface of the fabric, visible to the operator, and the upper thread is longer, generally up to several kilometers, and the replacement frequency is relatively low. When the upper thread is exhausted or broken, the operator can find it in time. The bobbin thread is not the case, it is located in the rotary hook under the sewing material, and the rotary hook is installed under the bottom plate. During the process of sewing fabrics, the operator is invisible, and the bobbin capacity of the bobbin...

AI Technical Summary

Problems solved by technology

[0003] At present, there are only bottom thread detection devices for horizontal rotary hooks on the market, and some of them need further supplementary processing such as opening light-transmitting grooves on the rotary hook case, and at the same time, further processing is required on the bobbin core, which is not only costly, but also not conducive to popularization. ; and the structure of some detection devices is not suitable, resulting in a delay in the control time, unable to detect that the bottom thread has been used up in time, resulting in a row of holes without sutures on the sewing material

As for the vertical rotary hook (commonly known as Chaotianshuo), due to its installation characteristics and small space, the bottom line detection device formed by it has not yet appeared on the market. With the development of automobile interior, sofa, luggage and other industries, the market The demand for the detection function of the bottom line of the vertical rotary hook is getting stronger and stronger

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