CN2687148Y - Loom weft pretension device - Google Patents
Loom weft pretension device Download PDFInfo
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- CN2687148Y CN2687148Y CN 200420019716 CN200420019716U CN2687148Y CN 2687148 Y CN2687148 Y CN 2687148Y CN 200420019716 CN200420019716 CN 200420019716 CN 200420019716 U CN200420019716 U CN 200420019716U CN 2687148 Y CN2687148 Y CN 2687148Y
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Abstract
The utility model discloses a loom weft pretension device which can pre-add sufficient weft tension when the loom is beating-up. This loom weft pretension device mainly makes use of the spraying jet of the picking nozzle to make the front side of the reed flying travel towards the right and left directions to carry out filling insertion, and by the forward of the reed to finish the assembly of weft front part catcher on the rest position beside the deflection filling insertion of the reed in the loom of beating-up. The weft front part catcher is composed of a side opening beside the reed, a slit shape receiving port which overlaps the path of the weft front part going forward to the location of beating-up after filling insertion, a flat weft absorption part connecting the interior of the receiving port and extending out on the direction of filling insertion, and a wide jet spray nozzle part with the front part facing the direction of filling insertion inside of the weft absorption part. The tabular spraying jet sprayed out of the jet spray nozzle part generates an attraction effect in the area of weft absorption part, and under this effect, the weft front part is always in the state of forward inside of the weft absorption part and keeps this state all the time.
Description
Technical field
The utility model relates to loom, and specifically, the utility model is the pre-tension device about a kind of water jet looms, air-jet loom, and the effect of this device is to the weft yarn pre-tension behind the wefting insertion, before beating up.
Background technology
As Figure 10,11 are depicted as traditional air-jet loom (spy opens flat 9-256245 communique), and 79 is slay among the figure, 80 are the formation stretch nozzle of weaving cotton cloth, 81 are discarded selvedge formation stretch nozzle, 82 is weft detector, 83 are the wefting insertion pilot jet, 84,85 is clamper, 86 is suction pump, 87 is air supply pipe, 88 is electromagnetic valve, 89 are the drag devices that nuzzles up, 90 are the resistance area that nuzzles up, 91,92 is weft path, 93 is the temple that prevents to weave cotton cloth and contract and knit, 94 is weft yarn, 94a is the weft yarn front end, 95 is warp thread, 96 for weaving cotton cloth, 97 for before knitting, 98 are discarded selvedge formation warp thread, 99 are discarded selvedge, 100 is pearl ball limit.
In the air-jet loom, weft yarn 94 from main burner (figure does not show) ejaculation, aerojet by picking auxiliary nozzle 83, fly away in wefting insertion path 91, after its front end was detected by weft detector 82, electromagnetic valve 88 was opened, compressed air is come in by air supply pipe 87, make to produce negative pressure in the suction pump 86, utilize this negative pressure, weft yarn front end 94a is inhaled in the suction pump 86 by the end-face hole of the drag devices 89 that nuzzles up of suction pump 86 ends.
As everyone knows, the length of weft yarn is (determined according to institute's measured length) fixed in the air-jet loom, under the situation by the jet wefting insertion that flies away of Weft insertion nozzle (figure do not show), the after-stage of wefting insertion is because jet deceleration and diffusion influence, and jet weft yarn conveyance ability will descend to some extent.On the other hand, a little elastic elongation is arranged, in case behind the wefting insertion, can occur by self elastic shrinkage to the trend of Weft insertion nozzle one side retraction by the weft yarn 94 of jet conveyance.Because the existence and the influence of weft yarn conveyance ability drop and weft yarn elastic contractile force, cause the weft tension instability behind the wefting insertion, and weaving cotton cloth of causing that weft yarn 94 and warp thread 95 braidings come out 96 produces defective such as coilings.Though discarded selvedge forms with warp thread 98 clipped weft yarn front end 94a, and the effect of certain its retraction of inhibition is arranged, effect is not fairly obvious.Suction pump 86, the drag devices 89 that nuzzles up also dispose in order to address this problem, be by with the frictional force of weft yarn front end 94a, keep predetermined weft tension.
In addition, in recent years, the demand of the elastic filament textile product that percentage elongation and elastic contractile force are all very big is in continuous expansion, and elastic filament is weaved adds man-hour, need keep very strong tension force.The friction that relies on air keeps stronger tension force, certainly will will increase the length of residual yarn.The length that increases residual yarn is not only uneconomical, and because inweaving of crooked residual yarn is easy to produce waste product.Our drag devices 89 that nuzzles up of mentioning of front, the effect of weft tension though improve, but its aufbauprinciple is after weft yarn front end 94a is bent to the right angle, be drawn in the drag devices 89 that nuzzles up, therefore the problem of residual yarn length does not still solve, simultaneously, and for weft yarn front end 94a is bent to the right angle, also need to increase a weft yarn in addition and catch nozzle, increased jet consumption so again greatly.
Such problem exists on water jet looms equally.Though on water jet looms, reed self has disposed the device that attracts weft yarn front end, pre-tension, but, before the weft yarn after reed arrives wefting insertion, can't add weft tension in advance, from this point, to compare with air-jet loom, it is very difficult (spy opens clear 48-26828 communique) that water jet looms is wanted fully to add weft tension in advance.For example, the reciprocating action of beating up is: when crankangle is 0～180 °, reed is retreated, when crankangle was 180～360 °, the water jet looms that reed is advanced was when crankangle is 100 °, begin water spray from Weft insertion nozzle, and with fixed pressure and the water yield continue ejection, when crankangle was 260 °, water spray stopped.When crankangle was 100 °, the water spray from Weft insertion nozzle begins arrived deflected weft-guiding side (deflection nozzle side) when crankangle is 240～310 °.On the other hand, with the weft yarn after the tested length of certain length, by the water spray that comes out from Weft insertion nozzle, when crankangle is 100 °, begin to fly away, it arrives deflected weft-guiding side foremost when crankangle is 260 °.
In addition, above-mentioned crankangle is general angle example, is not certain.Because when weft yarn stops to fly away, water spray stops just, therefore, by the conveyance of spray water the weft yarn of a little elastic elongation is arranged, and the trend that is bounced back to Weft insertion nozzle one side by the elastic shrinkage of self can occur.At this moment, reed does not also arrive the weft yarn behind the wefting insertion, and therefore, defectives such as coiling can appear in water jet looms too.
In order to prevent the generation of this defective, the best way is: the weft yarn front end arrives deflected weft-guiding side in a period of time later on when crankangle is 260 °, still continue water spray.; in case the elastic contractile force accident of the weft yarn of elastic elongation is powerful, add this locational unfavorable factor of weft yarn front end, probably the power with wefting insertion side water spray is difficult to keep weft tension; if strengthen the increase that water spray can be directly connected to water content consumption, the rising that brings cost.Also have the various stable schemes of keeping before beating up of weft tension to be suggested, wherein a kind of method is to install at the deflected weft-guiding side of water jet looms to expose nozzle stretching weft yarn front end (spy opens clear 48-26828 communique) for this reason.But still fully do not reach the purpose that keeps weft tension, shortens residual yarn length.Therefore, even the mechanism that utilizes traditional running-on hard waste to add weft tension in advance also is indispensable on state-of-the art loom, and the waste problem that the running-on hard waste brings does not still solve.
The utility model content
The purpose of this utility model just is to provide a kind of weft yarn pre-tension device, it can be with the consumption of a spot of water or gas, short and small residual yarn length, under the state of no running-on hard waste, accurately capture the weft yarn front end, add enough weft tensions in advance, and keep sufficient weft tension to finish up to beating up.
For achieving the above object, weft yarn pre-tension device of the present utility model adopts following technical scheme: utilizing the injection stream of Weft insertion nozzle, weft yarn is flown away to left and right direction in the front side of reed carry out wefting insertion, and finish in such loom that beats up by advancing of reed, on the deflected weft-guiding side resting position of this reed, be equipped with the receiving port of a slit-shaped, this receiving port is near the reed side opening, and with wefting insertion after the weft yarn front end to advance to the track of stop position overlapping; A flat weft yarn attraction portion connects the inside of above-mentioned receiving port, stretches out towards the wefting insertion direction; A weft yarn front end catcher, this catcher is in above-mentioned weft yarn attraction portion, the wide-jet spray nozzle portion of a front end towards the wefting insertion direction arranged, the flat injection stream that ejects from this spray nozzle part, in weft yarn attraction portion zone, produce and attract effect, under the effect of this effect, the weft yarn front end is in advanceable state all the time in weft yarn attraction portion, and is keeping always.
Because the receiving port of slit-shaped and the track that the weft yarn front end behind the wefting insertion advances to stop position are overlapping, therefore, the residual yarn length that utilizes weft yarn front end catcher to keep can reach the shortest, in addition, in flat weft yarn attraction portion, the front end of the spray nozzle part of wide cut is towards the wefting insertion direction, by jet action, air outside is inhaled into into from the receiving port of slit-shaped, jet flow has been improved at the gas interflow of these air outside and spray nozzle part ejection greatly, and, gas mixes with gas, the weft yarn front end is had the effect of untwisting.Therefore, the combination of the increase of jet flow and weft yarn front end untwisting effect, increased the frictional force of weft yarn front end and air effectively, and, because the weft yarn front end is not crooked, so this frictional force can directly affact weft yarn integral body, even residual yarn length for the shortest, does not have the hitch hard waste yet, still can obtain enough weft yarn stretching actions, and the stretching action of this weft yarn can stably last till the end of beating up.Compare with traditional loom, adopt loom of the present utility model, weft yarn can save 5%; Under the situation that the water circulation of the weft yarn front end catcher on the water jet looms is utilized again, the consumption of water can reduce 50%.
For air-jet loom, weft yarn pre-tension device of the present utility model also can adopt another form: utilizing the jet-stream wind of Weft insertion nozzle, make weft yarn along the guide groove that on the wefting insertion direction of reed front side, stretches out, fly away to left and right direction and carry out wefting insertion, and finish in the loom that beats up by advancing of reed, on the deflected weft-guiding side end of above-mentioned guide groove, be equipped with the suction tube of a straight tube-like, this suction tube, be entrenched in the above-mentioned guide groove, one end opening is on above-mentioned guide groove, and other end opening is towards the wefting insertion direction; A weft yarn attraction portion, this weft yarn attraction portion is formed on the inside of above-mentioned suction tube; A weft yarn front end catcher, this catcher is in above-mentioned weft yarn attraction portion, the air current spray nozzle portion of a front end towards the wefting insertion direction arranged, the jet-stream wind that ejects from this air current spray nozzle portion, in above-mentioned weft yarn attraction portion, produce negative pressure, under the effect of this negative pressure, arrive the weft yarn front end in the above-mentioned suction tube, attracted in the above-mentioned weft yarn attraction portion.
The weft yarn pre-tension device of this air-jet loom is assemblied in the deflected weft-guiding side end of the guide groove of reed, so can farthest shortens residual yarn length; In addition, in weft yarn attraction portion, the front end of air current spray nozzle portion is towards the wefting insertion direction, by jet action, air outside is inhaled into into from suction tube, the gas interflow of these air outside and the ejection of air current spray nozzle portion, improved jet flow greatly, and gas mixes with gas, the weft yarn front end is had the effect of untwisting.Therefore, the combination of the increase of jet flow and weft yarn front end untwisting effect, increased the frictional force of weft yarn front end and air effectively, and, because the weft yarn front end is not crooked, so this frictional force can directly affact weft yarn integral body, even residual yarn length is for the shortest, also can obtain enough weft yarn stretching actions,, make the stretching action of weft yarn can stably last till the end of beating up because weft yarn pre-tension device and reed become one.
Description of drawings
Fig. 1 is the side view at the main position of the 1st kind of form of the utility model.
Fig. 2 is the part amplification sectional view of the weft yarn pre-tension device of Fig. 1.
Fig. 3 is the duty partial plan of the weft yarn pre-tension device of Fig. 1.
Fig. 4 is the duty part front view of the weft yarn pre-tension device of Fig. 1.
Fig. 5 is the T-T sectional view of Fig. 2.
Fig. 6 gives water circulation path and the residual yarn recovery mechanism oblique view of weft yarn thereof for the weft yarn pre-tension device.
Fig. 7 A is the front view of reed that has assembled the weft yarn pre-tension device of the 2nd kind of form of the utility model.
Fig. 7 B is the amplification front elevation of the weft yarn pre-tension device on the T-T line of Fig. 7 A.
Fig. 8 is the amplification profile of partial cross section that comprises the main position of the weft yarn pre-tension device among Fig. 7.
Fig. 9 is the left view of the weft yarn pre-tension device of Fig. 8.
Figure 10 is the oblique view of the weft yarn pre-tension device on the traditional air-jet loom.
Figure 11 is the side view of the weft yarn pre-tension device on the traditional air-jet loom.
Symbol description:
1, Weft insertion nozzle; 2, weft yarn; 3, warp thread; 4, knit before;
5, reed; 6, slay; 7, dent; 8, guide groove;
10, weft yarn pre-tension device (weft yarn front end catcher);
11, receiving port; 12, weft yarn attraction portion; 13, water jet portion;
14, the 1st member; 15, the 2nd member; 16, substrate
17, water tank; 18, water ejection plate; 19, water pipe head;
20, water pipe; 22, ejiction opening; 23, spray nozzle part;
24, installation bracket; 25, water ejection stream; 27, frame;
30, funnel; 31, flexible pipe; 32, water pot; 33, conduit;
34, pump; 35, screen pack; 36, residual yarn filter;
37, cutting knife; 50, weft yarn pre-tension device (weft yarn front end catcher);
51, suction tube; 52, jet-stream wind generator;
52a, air current spray nozzle portion; 53, air ejection stream.
The specific embodiment
Below, in conjunction with the accompanying drawings 1～9, the utility model is described in further detail by embodiment.
Be depicted as the water jet looms weft yarn pre-tension device of first kind of form of the present utility model as Fig. 1～5.Reed 5 in Fig. 1～4 is the flat reeds that move reciprocatingly on fore-and-aft direction with fixed journey system, has many dents to keep small gap to be arranged in parallel in the slay 6 of the rectangle of growing crosswise.Left end one side (wefting insertion side) of the reed 5 of Fig. 1 is provided with wefting insertion main burner 1, and the resting position of right-hand member one side (deflected weft-guiding side) of reed 5 is provided with weft yarn pre-tension device 10 (weft yarn front end catcher).
Weft yarn pre-tension device 10 is processed by sheet metal, is the flat of growing crosswise, and utilizes installation bracket 24 and bolt 28 to be installed on the loom body frame 27 shown in Figure 1.Installation bracket 24 among Fig. 1 vertically on the bolt slotted hole is arranged, frame 27 the bolt slotted hole transversely arranged, utilize these slotted holes, weft yarn pre-tension device 10 can be adjusted the position and be installed in Fig. 1 up and down.Weft yarn pre-tension device 10 mainly has the water jet 13 of emission water spray in the flat cylindrical weft yarn attraction portion 12 of receiving port of in-line slit and the weft yarn attraction portion 12 to constitute by an end.Weft yarn attraction portion 12 is to be made of the binding that front view is the 1st member 14 in hollow, rectangular cross section and groove shape the 2nd member 15 that constitutes the cross section rectangular channel by fore-and-aft direction as shown in Figure 5.The 1st member 14 is by the base plate 14a of the smooth rectangle of growing crosswise, with among Fig. 2 of base plate 14a to the oblique crooked water-accepting board 14b in below of left end, the side plate 14c that directly over it, stretches out from the two ends of base plate 14a and water-accepting board 14b, and plate lid (figure does not show) formation that links the upper end of two side plate 14c.The 2nd member 15 is made of smooth rectangular base plate 15a and the side plate 15b that stretches out directly over it from the two ends of base plate 15a, and the front end of the 2nd member 15 as shown in Figure 6, links with funnel 30.Funnel 30 links to each other with water pot 32 by water pipe 31, and the water outlet side of pump 34 links to each other with weft yarn pre-tension device 10 by water pipe 20.The jar mouth of water pot 32 is equipped with the residual yarn filter 36 that can freely load and unload, and screen pack 35 is arranged at the bottom of this filter, flows through the water process that contains residual yarn of coming from water pipe 31 and filters, and flows in the water pot 32, and residual yarn then is filtered on screen pack 35.In addition, on the top, side of water pot 32 relief sewer 38 is installed.
The box-shaped water jet portion 13 that grows crosswise flat is fixed on the top of the weft yarn attraction portion 12 of square-section, and this water jet portion 13 is the parts that constitute the cover plate of the 1st member 14.Water jet portion 13 is made of the substrate 16 of flat rectangular, the water tank 17 that is fixed on substrate 16 belows and water ejection plate 18.The overhanging carriage 24 that is equipped with of the rearward end of substrate 16, this carriage 24 are used for installing weft yarn pre-tension device 10 on loom.In the upper central of substrate 16, overhanging water pipe head 19 is installed, water pipe 20 is connected on this joint, and the water under high pressure of supplying with by water pipe 20 from the outside 21 is at first accommodated in water tank 17, and ejection plate 18 sprays from water spray-hole 22 towards water then.As shown in Figure 5, water spray-hole 22 is made up of a plurality of uniformly-spaced holes of row of the header board that is arranged in water tank 17.Water ejection plate 18 is by the vertical panel of parallel opposition and the hang plate that stretches out to oblique below from this vertical panel lower end constitute at certain intervals with the header board of water tank 17.Like this, just between hang plate and water tank 17, formed the wide-jet spray nozzle portion 23 of a micro gap, from this nozzle high-speed water jets.
As shown in Figure 3, if the position that the reed 5 that our setting seesaws beats up after advance (chain-dotted line) is P1, if for the reed 5 that advances, the position of wefting insertion is P2, when then setting its banner, consider stop position P1 and insertion position P2 are comprised to come at the two ends of the receiving port 11 of weft yarn pre-tension device 10.In addition, make the front of receiving port 11 of weft yarn pre-tension device 10 near the deflected weft-guiding side end face of reed 5.
Operation principle to the weft yarn pre-tension device of water jet looms describes below.Shown in Fig. 3 and 4, when reed 5 seesawed certain position, wefting insertion main burner 1 ejected current according to certain path of flying away, and by this injection water, the front end of weft yarn 2 begins to fly away.As shown in Figure 2, after the front end of the weft yarn 2 that flies away arrived receiving port 11, weft yarn 2 was subjected to friction from the current in the receiving port 11 with the wefting insertion injection water, is inhaled into immediately in the receiving port 11, weft yarn 2 integral body have been added the tension force of the direction of flying away in advance, are in the state of abundant tension.After wefting insertion finished, reed 5 advanced, and weft yarn 2 is pressed, and as shown in Figure 4, reed 5 and weft yarn 2 move to stop position P1.Among Fig. 4, weft yarn 3, knit preceding 4, weave cotton cloth 4 ' be expressed out, reed 5 with weft yarn 2 squeeze into knit in preceding 4 after, begin to retreat.Weft yarn 2 from wefting insertion to the overall process of beating up, its front end is inhaled into all the time in receiving port 11, the tension force when finishing with wefting insertion is identical.
In addition, the water that comes out from the water jet 13 of weft yarn pre-tension device 10 and arrive the injection water of receiving port 11 from main burner, and the residual yarn 2a of weak point of cutting knife 37 excisions shown in Figure 6 flow in the funnel 30, and be back in the water pot 32 by water pipe 31.The residual yarn 2a of filtration on screen pack regularly removed, and the water of removing behind the residual yarn 2a is recycled the water jet portion 13 that supplies with weft yarn pre-tension device 10 from water pot 32 by pump 34.Therefore reduce the waste of water, reduced the operating cost of loom.And, because the residual yarn 2a of cutting knife 37 excision is that residual yarn 2a is under the state of stretching and carries out in the weft yarn attraction portion 12 of weft yarn pre-tension device 10, therefore can flow into really in the funnel 30, avoided residual yarn 2a to mix weaving cotton cloth 4 ' in phenomenon.
As mentioned above, the front end of weft yarn 2 is inhaled in receiving port 11, finish to have been added certain force of strain up to wefting insertion always, therefore weft yarn 2 is driven into the part of knitting in preceding 4, keep certain force of strain too, elastical retraction can not occur, so just can be with the residual yarn length of minimum, finish the inweaving of warp thread, and as weave cotton cloth 4 ' be fixed.Experiment showed, device of the present utility model, compare that weft length can save 5% with traditional machine.In addition because until beat up, weft yarn 2 can not bounce back, therefore weave cotton cloth 4 ' essence degree of knitting improve, quality and material utilization rate improve.And, only depend on weft yarn pre-tension device 10, just can finish the effect that prevents the weft yarn retraction from wefting insertion to the overall process of beating up, therefore, the weave cotton cloth design of end configuration running-on hard waste, setting up design such as pilot jet on weft yarn flies away the path can not want, and makes the cost of loom reduce and is more prone to.
In addition,, be attracted immediately and can not bounce back, therefore can reduce the water consumption of impelling the injection water that weft yarn 2 flies away greatly because after the front end of weft yarn 2 arrives receiving port 11.For example, weft yarn 2 after the tested length with certain-length is by the injection water of wefting insertion main burner 1, when 110 ° of crankangles, begin to fly away, when when 260 ° of crankangles, arriving deflected weft-guiding side foremost, attract because the front end of the weft yarn 2 that stops to fly away is accepted mouthfuls 11, can not bounce back even without injection water this moment yet, like this, can be as traditional method, after 260 ° of weft yarn front end arrival crankangles, still need to continue injection water, until being 310 ° to crankangle; Experiment showed, the consumption that injection water once (is throwed a spear once), be 1/3 of conventional method, injection water consumption once is generally 4～6cc, like this, just can save the degree of 1.5～2cc.
More than for and the reed that seesaws is 5 that separate, the example that is fixed on the locational weft yarn pre-tension device in its side; Fig. 7～9 are depicted as the weft yarn pre-tension device 50 of the 2nd kind of form of the present utility model, and this device is fixed as one with reed 5, and is different with above-mentioned form of implementation.
Weft yarn pre-tension device 50 is to be fixed on the suction tube 51 of deflected weft-guiding side end of guide groove 8 of reed 5 and the air flow jetting generator tube 52 of the generation jet-stream wind in the suction tube 51 constitutes by embedding.Suction tube 51 is the almost consistent straight tubes of cross section internal diameter shape with the guide groove 8 of reed 5, be embedded at the deflected weft-guiding side end of guide groove 8 by seamless unoccupied place, its entrance side end face, as shown in Figure 8, for not with the weft yarn front end crash, and be processed to conical surface C, and be fixed on the guide groove 8 by suitable anchor clamps.Stream sprays the tube wall that generator tube 52 tilted directions connect suction tube 51, and sealing is fixedly welded in the suction tube 51.Giving prominence to the front end that sprays generator tube 52 at the stream of suction tube 51 inside is air current spray nozzle 52a, has formed air between the inner face of this air current spray nozzle 52a and suction tube 51 and has sprayed stream 53.Be transported to the pressure-air of air flow jetting generator tube 52 from the outside, 52a becomes jet-stream wind from air current spray nozzle, is ejected into air ejection stream 53, and this jet-stream wind flows along the weft yarn direction of flying away, and an adnation becomes negative pressure area at the upper reaches of air ejection stream 53.
Operation principle to the weft yarn pre-tension device 50 of air-jet loom describes below.Jet-stream wind by 1 ejection of the wefting insertion main burner among Fig. 7 A, arrive the weft yarn front end of the deflected weft-guiding side end of guide groove 8, after arriving suction tube 51 inside, immediately by the formed vacuum suction of the jet-stream wind that ejects from air flow jetting generator tube 52, be stretched towards the weft yarn direction of flying away, make weft yarn 2 integral body all be in the state of abundant tension, and continue this state and advance to finish until reed 5 and beat up.
Above-mentioned the 2nd kind of form, from wefting insertion to the overall process of beating up, the weft yarn front end is attracted pipe 51 all the time and attracts, and the tension force when finishing with wefting insertion is identical, therefore, weft yarn elastical retraction can not occur until beat up, so just can be with the residual yarn length of minimum, finish the inweaving of warp thread, and as weave cotton cloth 4 ' be fixed.Same, the 2nd kind of form compared with traditional loom, and weft length can save 5%.And can improve weave cotton cloth ' essence degree of knitting, quality and material utilization rate improve.And, only depend on weft yarn pre-tension device 50, just can finish the effect that prevents the weft yarn retraction from wefting insertion to the overall process of beating up, therefore, the weave cotton cloth design of end configuration running-on hard waste, setting up design such as pilot jet on weft yarn flies away the path can not want, and makes the former cost of loom reduce and is more prone to.
Above-mentioned the 1st kind of form, owing to be the receiving port that stretches out a slit-shaped, the track that advances to stop position with weft yarn front end behind the wefting insertion is overlapping, therefore, the residual yarn length that utilizes weft yarn front end catcher to keep can reach the shortest, in addition, in flat weft yarn attraction portion, the front end of the spray nozzle part of wide cut is towards the wefting insertion direction, by jet action, air outside is inhaled into into from the receiving port of slit-shaped, jet flow has been improved at the gas interflow of these air outside and spray nozzle part ejection greatly, and, gas mixes with gas, the weft yarn front end is had the effect of untwisting.Therefore, the combination of the increase of jet flow and weft yarn front end untwisting effect, increased the frictional force of weft yarn front end and air effectively, and, because the weft yarn front end is not crooked, so this frictional force can directly affact weft yarn integral body, even residual yarn length is for the shortest, also can obtain enough weft yarn stretching actions, and the stretching action of this weft yarn can stably last till the end of beating up.Therefore, being used to traditionally guarantees that the running-on hard waste of weft tension and unnecessary injection stream can not want fully, realized the reduction of the cost of raw material and operating cost then, saved the discarded cost of running-on hard waste.
According to measuring and calculating, loom of the present utility model is compared with traditional loom, and weft yarn can save 5%; And under the occasion that the water circulation of the weft yarn front end catcher on the water jet looms is utilized again, the consumption of water can reduce 50%.
When using traditional water jet looms, in order to improve the quality of textile product, also end up with nothing definite even occur the decay of weft tension after weft yarn flies away, but do not having under the angle of flying away of surplus, emitting the danger that the warp thread interference causes wefting insertion to stop to occur, making insertion position as far as possible near before knitting.And the utility model even without the running-on hard waste, also can be worried the decay of weft tension because weft yarn front end catcher has been arranged, insertion position is set in away from the rear before knitting, like this, not only can guarantee enough angles of flying away, can also eliminate the danger that wefting insertion stops.In addition, owing to do not need the running-on hard waste, make that weft yarn front end catcher can be more near fabric one end, and then can shorten residual yarn length, reduce raw-material cost.In addition, for the polychrome loom of arranging a plurality of Weft insertion nozzles, compare with tradition, the configuration of nozzle brings bigger surplus can for the angle of flying away, and the nozzle quantity that can dispose increases greatly.Under the situation of traditional angle of flying away that does not have surplus, different types of yarns such as the diameter of yarn need the nozzle of different pressures, and the nozzle of different pressures needs different types of wefting insertion pump, the utility model is regardless of the kind of yarn, even Weft insertion nozzle pressure is certain, also can guarantee enough weft tensions, Weft insertion nozzle pump that therefore need not multiple class.
For the 2nd kind of form of the present utility model,, therefore can shorten residual yarn length owing to be the deflected weft-guiding side end that is assemblied in the guide groove of reed the shortlyest, in addition, in weft yarn attraction portion, the front end of air current spray nozzle portion is towards the wefting insertion direction, by jet action, air outside is inhaled into into from suction tube, jet flow has been improved at the gas interflow of these air outside and the ejection of air current spray nozzle portion greatly, and, gas mixes with gas, the weft yarn front end is had the effect of untwisting.Therefore, the combination of the increase of jet flow and weft yarn front end untwisting effect, increased the frictional force of weft yarn front end and air effectively, and, because the weft yarn front end is not crooked, so this frictional force can directly affact weft yarn integral body, even residual yarn length is for the shortest, also can obtain enough weft yarn stretching actions,, make the stretching action of weft yarn can stably last till the end of beating up because weft yarn pre-tension device and reed become one.Therefore, being used to traditionally guarantees that the running-on hard waste of weft tension can not want fully, realized the reduction of the cost of raw material then, saved the discarded cost of running-on hard waste.
The common feature of the 1st kind and the 2nd kind form of the present utility model: the weft yarn front end is attracted weft yarn Process in the front end catcher is being carried out with the on all four direction of wefting insertion direction, therefore, passes Use on the system, the crooked rectangular seizure nozzle of weft yarn front end needn't be used again, thereby can reach joint The effect of about equipment cost and operating cost.
Claims (2)
1, a kind of weft yarn pre-tension device of loom, described loom is an injection stream of utilizing Weft insertion nozzle, weft yarn is flown away to left and right direction in the front side of reed carry out wefting insertion, and finish the loom that beats up by advancing of reed, it is characterized in that, on the deflected weft-guiding side resting position of described reed, be equipped with:
, the receiving port of slit-shaped, this receiving port, near the reed side opening, and with wefting insertion after the weft yarn front end to advance to the track of stop position overlapping;
A flat weft yarn attraction portion connects the inside of above-mentioned receiving port, stretches out towards the wefting insertion direction;
A weft yarn front end catcher, this catcher is in above-mentioned weft yarn attraction portion, the wide-jet spray nozzle portion of a front end towards the wefting insertion direction arranged, the flat injection stream that ejects from this spray nozzle part, in weft yarn attraction portion zone, produce and attract effect, under the effect of this effect, the weft yarn front end is in advanceable state all the time in weft yarn attraction portion, and keeps always.
2, a kind of weft yarn pre-tension device of loom, described loom is the jet-stream wind that utilizes Weft insertion nozzle, the guide groove that weft yarn is stretched out on the wefting insertion direction of reed front side, fly away to left and right direction and carry out wefting insertion, and finish the loom that beats up by advancing of reed, it is characterized in that, be equipped with on the deflected weft-guiding side end of described guide groove:
, the suction tube of straight tube-like, this suction tube is entrenched in the above-mentioned guide groove, and an end opening is on above-mentioned guide groove, and other end opening is towards the wefting insertion direction;
A weft yarn attraction portion, this weft yarn attraction portion is formed on the inside of above-mentioned suction tube;
A weft yarn front end catcher, this catcher is in above-mentioned weft yarn attraction portion, the air current spray nozzle portion of a front end towards the wefting insertion direction arranged, the jet-stream wind that ejects from this air current spray nozzle portion, in above-mentioned weft yarn attraction portion, produce negative pressure, under the effect of this negative pressure, arrive the weft yarn front end in the above-mentioned suction tube, attracted in the above-mentioned weft yarn attraction portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019716 CN2687148Y (en) | 2004-01-19 | 2004-01-19 | Loom weft pretension device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019716 CN2687148Y (en) | 2004-01-19 | 2004-01-19 | Loom weft pretension device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2687148Y true CN2687148Y (en) | 2005-03-23 |
Family
ID=34669177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420019716 Expired - Fee Related CN2687148Y (en) | 2004-01-19 | 2004-01-19 | Loom weft pretension device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2687148Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103348045A (en) * | 2011-02-01 | 2013-10-09 | 株式会社丰田自动织机 | Weft tensioning device |
| CN105544070A (en) * | 2014-10-27 | 2016-05-04 | 株式会社丰田自动织机 | Weft yarn tension applying equipment of air-jet loom |
| CN112609312A (en) * | 2020-12-10 | 2021-04-06 | 海宁家辉新材料科技有限公司 | Knitting machine auxiliary device capable of maintaining weft yarn side wall tension to keep weft yarn side wall tension balanced |
-
2004
- 2004-01-19 CN CN 200420019716 patent/CN2687148Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103348045A (en) * | 2011-02-01 | 2013-10-09 | 株式会社丰田自动织机 | Weft tensioning device |
| CN105544070A (en) * | 2014-10-27 | 2016-05-04 | 株式会社丰田自动织机 | Weft yarn tension applying equipment of air-jet loom |
| CN105544070B (en) * | 2014-10-27 | 2018-01-19 | 株式会社丰田自动织机 | The weft tension application devices of air-jet loom |
| CN112609312A (en) * | 2020-12-10 | 2021-04-06 | 海宁家辉新材料科技有限公司 | Knitting machine auxiliary device capable of maintaining weft yarn side wall tension to keep weft yarn side wall tension balanced |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |