Facial line detection mechanism, facial line detection device and sewing machine provided with facial line detection device

Abstract

The invention aims at providing a facial line detection mechanism capable of monitoring the supply condition of facial lines, a facial line detection device provided with the mechanism and a sewing machine provided with the device. The facial line detection mechanism is characterized by comprising a base (31), a rotating shaft (38), a line roller (35), a detected component (36) and a detection component (37), wherein the base (31) is arranged on the sewing machine; the rotating shaft (38) passes through the base (31); the line roller (35) is fixed at one end of the rotating shaft (38) in a manner of being prominent from the first face of the base (31); the detected component (36) is fixed at the other end of the rotating shaft (38) in a manner of being prominent from the second face of the base (31) at the opposite side of the first face; and the detection component (37) is applied to detecting the rotation of the detected component (36).

Description

technical field [0001] The present invention relates to a needle thread detection device and a sewing machine provided with the needle thread detection device. Background technique [0002] Generally known slide fasteners include a slide fastener using metal elements and a coil slide fastener in which a monofilament (single thread) of nylon or resin is formed into a coil shape as a continuous element. Among them, coil zippers are available with brightly colored zippers, which are widely used from small items to bags. [0003] When manufacturing a coil zipper, the belt and the coil-shaped fastener element are generally manufactured separately, the coil-shaped fastener element is sewn on the belt, and then one of the top stop or the bottom stop is fixed on the belt, and the paired belt is pulled through. After the through passage of the head, fix the other of the top stop or the bottom stop to make a coil zipper. Equipment such as a sewing machine is often used in sewing the...

AI Technical Summary

Problems solved by technology

[0005] However, although the above-mentioned needle thread supply mechanism has a plurality of bobbins and each guide member (first to fourth guide members) as described above, there is no part for detecting whether the supply of the needle thread supplied from each bobbin is abnormal or not. Not able to detect abnormality or not

Therefore, when sewing coil-shaped elements to the belt, one of the upper threads may break, and the thread material may not be properly sewn to the belt.

Images