Weft yarn tension control device used for rapier loom

Abstract

The invention discloses a weft yarn tension control device used for a rapier loom. The weft yarn tension control device comprises an installing base, a weft yarn supporting mechanism, an electromagnetand a deflecting plate returning mechanism, a yarn pressing spring piece fixing base is arranged at the right end of the installing base, a weft yarn guiding ceramic circle hole is formed in the upper portion of the yarn pressing spring piece fixing base, and a weft yarn guiding ceramic circle is arranged in the weft yarn guiding ceramic circle hole; the weft yarn supporting mechanism is arrangedin the middle of the upward side of the installing base; the electromagnet is fixed to the downward side of the left end of the installing base; the deflecting plate returning mechanism is arranged at the left end of the installing base; the left end of a yarn pressing spring piece is connected with the top of a deflecting plate, the middle of the yarn pressing spring piece corresponds to the upper portion of the weft yarn supporting mechanism, the right end of the yarn pressing spring piece is connected with the top of the yarn pressing spring piece fixing base, the deflecting plate is connected with the deflecting plate returning mechanism, a weft yarn guiding ceramic circle hole is formed in the upper end of the deflecting plate and internally provided with a weft yarn guiding ceramiccircle, and the lower end of the deflecting plate extends toward the electromagnet. Few action transmission steps are arranged, and therefore the structure is simplified; response speed is increased when weft yarn tension is adjusted; the weft yarn tension control device meets the demand for high-speed weaving; the adaptability to different kinds of weft yarn is enhanced.

Description

technical field

[0001] The invention belongs to the technical field of auxiliary facilities for shuttleless looms, and in particular relates to a weft tension control device for rapier looms. Background technique

[0002] During the working process of the rapier loom, the path of the weft yarn is: the yarn is unwound from the bobbin, reaches the weft feeder, and then enters the weft yarn detector through the tensioner (that is, the tension control device), and then enters the loom. A certain static initial tension is applied behind the tensioner, which is constant and very important for normal weft insertion.

[0003] In the weft insertion process of the sword head, the actual tension of the weft yarn is the superposition of the dynamic tension and the static initial tension. The strength of the weft yarn is low, so the excessive peak value of the weft yarn tension will cause yarn breakage (ie broken weft), so it is necessary to reduce the weft yarn tension to ensure the no...

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