Threading and drafting device for doup harnesses for weaving leno brocade by using rapier loom

Abstract

The invention discloses a threading and drafting device for doup harnesses for weaving leno brocade by using a rapier loom. The device comprises a rapier comber board supporting rack, a columnar tappet plate, faucet handle hooks, hanging harness cords, metal doup small forks, doup groups, a positioning plate, heddle withdrawing springs and a harness threading supporting chassis, wherein the columnar tappet plate is arranged in the rapier comber board supporting rack, a plurality of harness cord holes are uniformly formed in the columnar tappet plate, the faucet handle hooks are distributed above the columnar tappet plate, and the harness threading supporting chassis is arranged below the columnar tappet plate; the doup groups are arranged between the rapier comber board supporting rack andthe harness threading supporting chassis, the doup groups in various columns are composed of a plurality of doup harnesses arranged from front to back, each doup harness is in an X shape, and heddleeyes are formed in the crossing parts, the portions, above the heddle eyes, of the doup harnesses serve as upper doup harnesses, and the portions, below the heddle eyes, of the doup harnesses serve aslower doup harnesses, the doup harnesses are divided into the front doup harnesses and the rear doup harnesses, and the front doup harnesses and the rear doup harnesses arranged at intervals from front to back to form the doup groups in various columns.

Description

technical field [0001] The invention relates to the field of textile machinery, in particular to a twisted heddle hanging and threading device for weaving jacquard leno fabrics on a rapier loom. Background technique [0002] Traditional shuttle jacquard leno is generally woven with twisted healds. (Such as figure 1 ) is a schematic diagram of the right threading method of twisted heddles made of wires. It uses the right half heald system to weave. The right twist turns to the left, so it is also called the right twist and left twist. The disadvantages of wire twisted healds are: wire half healds are not resistant to friction and are easy to break and twist, which cannot meet the high-speed operation and production of rapier looms at all, and can only be limited to low-speed shuttle jacquard machines. Therefore, the rapier jacquard weaving leno must be realized by using metal twisted heddles or plastic twisted heddles with metal half-heddles and invented and innovative str...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is exactly in order to solve the deficiencies in the background technology, to provide a kind of heddle heald hanging heddle threading device for weaving jacquard leno fabric by rapier loom, thereby one is to simplify the twisting principle of the old heald heald device mechanism, It overcomes the problem of warp tension difference in the production process of twisting and ground warp, that is, greatly reduces the additional tension in the twisting process of twisting the twisting warp, reduces the depth of the harness, that is, reduces the width of the harness, and makes the twisting shed and The tension deviation between the open shed and the ordinary shed becomes smaller, reducing the warp yarn breakage rate and creating the first condition for the high-speed operation of the loom

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