Draw hook rapid resetting mechanism for negative dobby shedding device

Abstract

The invention relates to a draw hook rapid resetting mechanism for a negative dobby shedding device, and belongs to the technical field of textile machinery. The negative dobby shedding device comprises a pair of frame wallboards, a set of upper draw hooks, a set of lower draw hooks, an upper pull broach, a lower pull broach, a long vertical needle, a short vertical needle, and a set of shedding connecting rods; and the draw hook rapid resetting mechanism comprises a first lever-arm fixed shaft and a second lever-arm fixed shaft, wherein the first lever-arm fixed shaft corresponds to the upper side of the set of upper draw hooks; the second lever-arm fixed shaft corresponds to the upper side of the set of lower draw hooks; the first lever-arm fixed shaft is provided with an upper draw hook rapid returning device which corresponds to the upper side of the upper draw hook and is contacted with the back of the upper draw hook; and the second lever-arm fixed shaft is provided with a lower draw hook rapid returning device which corresponds to the upper side of the lower draw hook and is contacted with the back of the lower draw hook. The technical scheme can ensure that the movement speed of the upper and lower draw hooks meets the requirement of the high-speed shedding of a weaving machine.

Description

technical field [0001] The invention belongs to the technical field of textile machinery, and in particular relates to a quick reset mechanism of a draw hook of a passive multi-arm opening device. Background technique [0002] The passive dobby opening device is an executive device that completes the opening movement of the heald frame during the weaving process of the loom. The structure of the passive dobby opening device in the prior art is as follows. image 3 As shown, it includes a pair of rack wall panels 1, a set of upper hooks 2a, a set of lower hooks 2b, and an upper broach 3a corresponding to the set of upper hooks 2a for pulling the upper hooks 2a , a lowering knife 3b corresponding to a group of lowering hooks 2b for pulling the lowering hooks 2b, a group of long vertical needles 4 that are equal in number to the upper pulling hooks 2a and connected to the upper pulling hooks 2a in a cantilever state, a A group of short vertical needles 5 that are equal in numbe...

AI Technical Summary

Problems solved by technology

But, in recent years, along with the speed of loom constantly improves, the shedding speed of the negative type dobby shedding device that is matched with loom is also correspondingly improved, thereby exposes that the falling speed of upper drag hook 2a and lower hook 2b can't be compared with The problem of matching the speeds of the upper and lower knives 3a and 3b, that is to say, the falling speed of the upper and lower hooks 2a and 2b restricts the speed of the loom and affects the production capacity of the loom

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