Shed double-opening mechanism of positive type dobby machine

Abstract

The invention relates to a shed double-opening mechanism of a positive type dobby machine, which belongs to the technical field of textile machinery. The shed double-opening mechanism comprises a first upper pulling hook, a second upper pulling hook, a first lower pulling hook, a second lower pulling hook, a first pulling hook connecting plate, a second pulling hook connecting plate, a first cutter blade, a second cutter blade, a cutter blade connecting sheet, an upper position limiting strip, a lower position limiting strip, an upper pulling cutter, a lower pulling cutter, a cutter blade support shaft, an upper reset rod, a lower reset rod, an opening arm and a short connecting rod, wherein the first pulling hook connecting plate and the second pulling hook connecting plate are mutually parallel, the cutter blades are provided with a first support arm, a first hinge arm and a second hinge arm. Compared with the prior art, the invention has the technical scheme that the second upper pulling hook, the second lower pulling hook, the second pulling hook connecting plate, the opening arm and the short connecting rod are added, the first cutter blade and the second cutter blade are adopted, and in addition, the cutter blade connecting sheet is hinged with the opening arm, so the requirement of forming two weaving sheds required by weaving double-layer woven fabrics can be met, and in addition, the whole structure is simple.

Description

technical field [0001] The invention belongs to the technical field of textile machinery, and in particular relates to a shed double-opening mechanism of a positive dobby machine, which is used for weaving two sheds of a loom. Background technique [0002] The concept about the dobby has long been seen in documents such as Chinese patent documents. As the Chinese invention patent application publication number CN1186879A introduces a rotary electronic dobby, the so-called rotary electronic dobby is driven by the motion of the cam to provide When the heald arm moves, the shed connecting rod is moved by the heald lifting arm, and then the heald frame is moved by the shed connecting rod to form the weaving shed of the loom. And the aforesaid active type dobby drives the movement of the heald arm not to be the cam, but the signal mechanism, the upper and lower return levers of the signal mechanism act on the upper and lower hooks, so that the upper and lower hooks are pulled by ...

AI Technical Summary

Problems solved by technology

[0007] It can be seen from the above description that the shed opening mechanism of the dobby with the above structure can only move the heald frame from the lowest point to the highest point to form a single shed, but cannot make the heald shed open separately in the upper and lower sheds to form a double shed , the end result of which is a constraint on the weaving of double-layer fabrics such as the aforementioned pile fabrics on the loom

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