CN2177736Y

CN2177736Y - Weft thread shears

Info

Publication number: CN2177736Y
Application number: CN 93243089
Authority: CN
Inventors: 王耀东; 白振铎; 王振江; 刘季九
Original assignee: SHIJIAZHUANG TEXTILE INST HEBEI PROV
Current assignee: SHIJIAZHUANG TEXTILE INST HEBEI PROV
Priority date: 1993-10-26
Filing date: 1993-10-26
Publication date: 1994-09-21
Anticipated expiration: 2003-10-26

Abstract

The utility model relates to a pair of weft thread shears of a weaving machine, which is composed of a rocking shaft 1, an eccentricity 2, a connecting rod 3, a breast beam 4, a moving knife 5, a fixed knife 6, a yarn hanging hook 7 and a knife frame 8. The utility model is characterized in that the tooth-shaped belt or the chain and the cam mechanisms of an original pair of weft thread shears are replaced by an eccentricity and a connecting rod mechanisms. The utility model has the advantages of simple structure and easy fabrication, and a false edge for clamping the weft thread on the weft thread incoming side is omitted and the weft thread quantity can be saved 2-3%.

Description

Weft thread shears

The utility model relates to a kind of scissors of Rapier looms.

Existing Rapier looms filling cutter is many by flute profile band or chain drive, and the scissors motion is by cam control, and complex structure, scissors are installed in outside the weft feeding side selvedge, and false limit clipped weft yarn is arranged between selvedge and scissors, weft yarn hard waste rate height, and waste is big.

The purpose of this utility model provides a kind of by the off-centre that is fixed on the rocker, through the connecting rod transmission, the edge of a knife is opened and closed, and saves the scissors on the false limit of weft feeding side.

" off-centre-connecting rod " mechanism has replaced " flute profile band or chain-cam " mechanism to the utility model on the weaving machine rocking shaft with being fixed on.Concrete structure is that knife rest is fixed on the loom front rest, and stationary knife and extension yarn hook are installed in the left and right sides of knife rest respectively, and stationary knife is close to selvedge, and off-centre is fixed on the weaving machine rocking shaft, and the two ends of connecting rod link with moving knife is eccentric respectively.Its course of action is: when loom slay is swung, be fixed on the off-centre on the rocker before machine, by connecting rod 3 clip opened, reed is squeezed into the edge of a knife to weft yarn; When slay is swung behind machine, stationary knife and hang the yarn hook and hook weft yarn simultaneously, send the latitude sword to clamp firm weft yarn after, the scissors closure is cut off weft yarn.

The utility model has the advantages that significantly:

One, replaced complicated " chain or flute profile band-cam " mechanism by rocker transmission eccentric stiffener, simple in structure, easily manufactured;

Two, stationary knife of the present utility model has saved the false limit of weft feeding side clipped weft yarn near selvedge, generally speaking, reduces weft yarn consumption 2-3%, reduces cost.

Fig. 1 is the structure diagram of filling cutter;

Fig. 2 is the transmission principle figure of filling cutter;

Fig. 3 cuts yarn part vertical view for filling cutter.

A kind of embodiment of the present utility model such as Fig. 1, Fig. 2, shown in Figure 3, constitute by rocker 1, off-centre 2, connecting rod 3, brest beams 4, moving knife 5, stationary knife 6, extension yarn hook 7 and knife rest 8, knife rest 8 is fixed on the loom front rest 4, stationary knife 6 and extension yarn hook are installed in the left and right sides of knife rest 8 respectively, stationary knife 6 is close to selvedge, eccentric 2 are fixed on the weaving machine rocking shaft 1, and the two ends of connecting rod 3 link with moving knife 5, eccentric 2 respectively.Entire mechanism drives off-centre 2, connecting rod 3, moving knife 5 motions by rocker 1.Now produced 20 of this utility models as a trial, be contained in respectively on 20 looms and tried out 8 months, reliable, compare saving weft yarn 3% with the filling cutter of other pattern.

Claims

1, a kind of filling cutter, it is characterized in that constituting by rocker 1, off-centre 2, connecting rod 3, brest beams 4, moving knife 5, stationary knife 6, extension yarn hook 7, knife rest 8, knife rest 8 is fixed on the loom front rest 4, stationary knife 6 and extension yarn hook 7 are installed in the left and right sides of knife rest 8 respectively, stationary knife 6 is close to selvedge, eccentric 2 are fixed on the weaving machine rocking shaft 1, and the two ends of connecting rod 3 link with moving knife 5 and eccentric 2 respectively.