Yarn slack eliminating device and spinning machine

Abstract

An object of the present invention is to provide a yarn slack eliminating device that enables tension applied to a yarn to be controlled while a spinning machine is in operation. A yarn slack eliminating device 12 includes an electric motor 25, a yarn slack eliminating roller 21, a yarn hooking member 22, an electromagnet 36, and a control section 74. The yarn slack eliminating roller 21 is rotationally driven by the electric motor 25. The yarn hooking member 22 is concentrically attached to the yarn slack eliminating roller 21 so as to be rotatable relative to the yarn slack eliminating roller 21. The electromagnet 36 generates a magnetic field to be applied to the yarn hooking member 22. The control section allows the magnetic field to generate a resistance torque resisting the rotation of the yarn hooking member 22 relative to the yarn slack eliminating roller 21. The control section 74 also controls an input to the electromagnet 36 to control the resistance torque.

Description

technical field [0001] The present invention relates to a yarn slack eliminating device for eliminating yarn slack generated during the period from spinning out yarn to winding up into a package in a spinning machine. Furthermore, the present invention also relates to a spinning machine provided with the above-mentioned yarn slack eliminating device. Background technique [0002] In the past, high-speed spinning machines such as air-type spinning machines that wind spun yarns to form packages have adopted such a structure that when a yarn defect is detected, the yarn defect is cut off with a yarn cutter and removed. Remove, and the yarn end of the yarn that is constantly sent from the spinning device is joined with the yarn end of the package side with a jointing device. Since the above-mentioned piecing operation is performed in a state where yarn winding is stopped, it is necessary to eliminate yarn slack. [0003] In view of this situation, Japanese Patent Application L...

AI Technical Summary

Problems solved by technology

However, this structure requires adjustment of the yarn slack eliminating device for each spindle when changing the resistance torque of multiple spindles at the same time, such as changing the processing type, which is very troublesome.

Moreover, the structure of the yarn slack elimination device disclosed in Japanese Patent Laid-Open No. 2006-306588 cannot finely adjust the resistance torque during the yarn winding process, or cannot make positive changes.

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