Yarn monitoring device and yarn winding machine

Abstract

A yarn monitoring device (34) includes a yarn irregularity sensor (37) and a yarn monitoring controller (81). The yarn irregularity sensor (37) monitors a yarn (21) that is being wound by an automatic winder (1). The yarn monitoring controller (81) performs a determination based on information acquired from the yarn irregularity sensor (37) and information pertaining to, for example, a traverse position of the yarn (21) acquired from the yarn detection sensor (71) of the automatic winder (1), and outputs a cutter operation signal based on the determination to operate a cutter (39). Furthermore, the yarn monitoring device (34) includes a yarn detection receiving section (83) to receive a yarn detection signal output by the yarn detection sensor (71).

Description

technical field [0001] The present invention generally relates to a yarn monitoring device for monitoring a traveling yarn in a yarn winding machine. Background technique [0002] Conventionally, a yarn winding machine such as an automatic winder or a spinning machine is known to have a yarn monitoring device that monitors the thickness of a traveling yarn. Such a yarn monitoring device is disclosed in JP-A-2009-190841 (Patent Document 1). [0003] In Patent Document 1, a yarn clearer as a yarn monitoring device is installed in an automatic winder that winds the yarn unwound from the yarn supply bobbin while traversing the yarn. The tube is coiled to form a package. This automatic winder has a winding drum for traversing the yarn and driving the winding tube. [0004] The yarn clearer of Patent Document 1 includes: a yarn clearing head having a yarn unevenness sensor for detecting the thickness of the yarn; and an analyzer for processing a signal from the yarn unevenness ...

AI Technical Summary

Problems solved by technology

However, if such control is adopted, the phenomenon of yarn skipping (end face falling off) in which the track of the yarn exceeds the package width due to the difference in the traverse position of the yarn at the time of cutting may cause defective packages.

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