Yarn feeding device for elastic yarn for flat knitting machine

Abstract

The invention provides a yarn feeding device for an elastic yarn for a flat knitting machine, which considers necessary yarn feeding of stretching and contraction of the elastic yarn during knitting on the flat knitting machine by employing the elastic yarn. The magnitude of an entering tension of an elastic yarn to a sending-out mechanism of a flat knitting machine and the magnitude of a knittingtension provided by a buffer arm are compared with each other, and based on a result of comparison, an appropriate correction amount is determined from a correction parameter to control the sending-out mechanism. The correction parameter includes a correction amount for increasing an amount of elastic yarn when the entering tension is larger than the knitting tension, and a correction amount fordecreasing the amount of elastic yarn when the entering tension is smaller than the knitting tension. A correction amount determining unit determines an appropriate correction amount from the correction parameter. A controlling unit controls the sending-out mechanism by using the correction amount determined by the correction amount determining unit.

Description

technical field [0001] The present invention relates to a yarn feeding device for an elastic yarn when knitting is performed on a flat knitting machine using a highly stretchable elastic yarn as a knitting yarn. Background technique [0002] Conventionally, elastic yarns using fibers that stretch and contract with high extensibility have been used in the weaving of underwear, socks, body protectors, sportswear, medical elastic garments, and the like. In the flat knitting machine for knitting these knitted products, it is desired to stabilize the loop length of the knitted product to be knitted and perform knitting with a predetermined yarn amount. When each knitting course is not knitted with a determined amount of yarn, a difference occurs in the size, texture, tension, etc. of the knitted product. [0003] As the prior art of the yarn feeding device of the elastic yarn in the loom, the following publications can be cited, for example. [0004] Patent Document 1 (Japanese...

AI Technical Summary

Problems solved by technology

[0007] However, in this invention, the preliminary storage is formed by the yarn wheel, so the size of the device is increased.

In addition, since the tension of the elastic yarn wound on the yarn wheel is different from the tension generated in the guide arm, the elastic yarn shrinks or expands on the yarn feeding path, so it cannot be supplied in the required amount.

In addition, no matter what tension the elastic yarn is wound on the yarn wheel, the characteristics of the yarn will change, making it difficult to supply the elastic yarn in the required amount.

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