CN1010597B

CN1010597B - Method and apparatus for processing faulty weft in loom

Info

Publication number: CN1010597B
Application number: CN 88109087
Authority: CN
Inventors: 三矢金平
Original assignee: Toyoda Jidoshokki Seisakusho KK
Current assignee: Toyota Industries Corp
Priority date: 1987-08-25
Filing date: 1988-08-23
Publication date: 1990-11-28
Also published as: CN1031732A

Abstract

An apparatus and its method of operation whereby when a jet loom is deenergized upon occurrence of abnormality in the insertion of a weft, the cutting operation of an inserted weft cutting device is prevented. As a result, a weft succeeding to the misinserted one is forcibly introduced into a weft introducing duct under blowing action of a blow nozzle oriented in a direction intersecting the weft insertion direction to be transferred to a pair of gripper rollers. The weft is separated by cutting from a weft inserting main nozzle by a second weft cutter device. Subsequently, the misinserted weft is withdrawn in the direction away from a cloth fell toward a reed with inclination relative to the weft insertion path within a region where the weft remains out of contact with warps.

Description

Method and apparatus for processing faulty weft in loom

The present invention relates to a kind ofly handle unusual introducing and be driven into fabric and with the method and apparatus of its weft yarn of from textiles, removing.

When in air-jet loom unusual wefting insertion taking place, the detection signal that sends according to weft detector and indicate unusual wefting insertion stops the running of air-jet loom.Under the situation that air-jet loom runs up, only the loom bent axle the effect of inertia backspin go around or some commentaries on classics after, loom just can stop.Therefore before caused by loom stop in a flash, the unusual weft yarn of introducing (to call the defect latitude in the following text) has been driven in fell or the fabric.

Therefore, open clear 62-170556 for removing the weft processing equipment that aforesaid this defect latitude (otherwise fault will occur in the fabric) designs Japanese Unexamined Patent Publication No 170556/1987(JP spy), 206058/1987(JP spy opens clear 62-206058) and 24339/1986(JP spy open clear 61-245339) and Japanese utility model application publication number 41083/1987(JP is real opens clear 62-41083) in disclose.With regard to these devices of the prior art, when because unusual wefting insertion occurs during caused by loom stop, weft yarn is subsequently introduced and is avoided, and configuration and wefting insertion main jet are chewed the Weft cutting-off apparatus that the direction that interrelates inweaves and are in non-starting state simultaneously, therefore, the defect latitude of squeezing into fell can utilize the weft yarn that causes fabric to chew from the wefting insertion main jet as lead-in wire laterally to draw to reach the purpose of removal.More precisely, weft yarn as a lead-in wire not only can be introduced a guide cylinder that is disposed at wefting insertion nozzle top by the moving gaseouse medium that is produced by an air-flow nozzle, and can introduce one with one of above-mentioned guide cylinder arranged perpendicular cover so that batch by being contained in the interior batching apparatus of this cover subsequently, thus, the defect latitude is drawn removal from fell.Thereafter, the detection signal whether the indication weft yarn that produces in a scheduled time according to a weft detector that is installed in guide cylinder inside exists is made the whether judgement of successful implementation of processing of defect latitude.In the structure that the clear 62-170556 of TOHKEMY is disclosed, measure the revolution that batches or draw roller of configuration in pairs by means of a noncontacting switch, and in the structure that in the clear 62-206058 of TOHKEMY, is disclosed, the revolution of linear measure longimetry roller detects with similar method, and this revolution is as the Consideration of judging about the processing of defect latitude.

In addition, the device that clear 62-170556 of TOHKEMY and the clear 62-206058 of TOHKEMY are disclosed need detect and/or measurement mechanism, for example, a swinging code machine, noncontacting switch, timer or similar device, these devices are used to measure with judging weft yarn handles the relevant drive motors of operating result or the revolution of rotor.Clearly, because measuring reliability is not enough, existing measurement means will increase the ratio of maloperation.For instance, though be that successful operation is made weft yarn and handled unsuccessful judgement, vice versa.This false judgment will cause the unwanted parking or the locking of loom, cause reducing its operating efficiency thus or cause the defect latitude to stay the interior such trouble of shed open that warp thread forms.

As being used for detecting the detector whether the guide cylinder weft yarn exists in the given time, comparatively commonly used is the photo-electric type weft detector.In addition, open clear 62-46676 in that Japanese Utility Model publication number 46676/1987(JP is real) adopt such structure in the device that disclosed, weft detector that a rotatable detection arm is provided carries out conversion along with the motion that an assembly is drawn a roller in the middle of the roller to weft yarn, this roller meshes with another roller under pressure, therefore, the horizontal inswept weft yarn transfer passage of rotatable detection arm.

But, said photoelectricity weft detector is defective, the weft yarn vibration that is delivered to Weft yarn drawout device can lead to errors, and reduces and detects the accuracy whether weft yarn exists, and just increasing undesirable weft yarn successively handles wrongheaded possibility for this.Under situation, can avoid really because the reduction of the detection accuracy that the weft yarn vibration causes by the mechanical type weft yarn detecting operation that turns detection arm.But, following the motion of clamping roller to make simultaneously in the parallel conversion hysteria detection system of moving of detecting element of weft detector, detection arm is had to cross over the whole width of quite wide weft yarn transfer passage and is finished scan operation.In this case, because under the restriction that the weft yarn that combines with detection arm produces, the scope that detection arm is rotated is limited or has narrowed down, although this may cause weft yarn to exist, the weft detector switching manipulation is not carried out yet.

Therefore, purpose of the present invention is exactly that the defect latitude processing method and the device that can overcome shortcoming in the above-mentioned prior art will be provided.

According to the present invention, in a preferred embodiment of finishing defect latitude processing method, when appearance is unusual in the wefting insertion process, weft yarn after the disconnected defect latitude remains on the state that links to each other with the defect latitude, be brought to Weft yarn drawout device and chew this weft yarn that ejects by the jet-stream wind medium that the air-flow nozzle sprays by the wefting insertion main jet, wherein, one is used to drive the predetermined step-length number of stepper motor rotation that matches with driven roller as the driving roller of an ejector part, and this driven roller is pressed in separably and drives on the roller, so as under pressure state clipped weft yarn.Thereafter, whether weft yarn exists measuredly on above-mentioned weft yarn transfer passage, when detecting no weft yarn, makes weft yarn and handles unsuccessful judgement.

Laterally draw from fell for the shed open of from fell, drawing the defect latitude and providing the follow-up weft yarn of lead-in wire to follow the defect latitude to form and to be transported to above-mentioned Weft yarn drawout device by warp thread.After stepper motor rotates a predetermined step-length number, be installed in the weft detector detection weft yarn of (being drawn by this ejector) on the transfer passage and whether exist along this passage weft yarn.Exist when testing result shows no weft yarn, then make weft yarn and handle unsuccessful judgement.

The invention provides a kind of device that is used for the defect latitude of handling of fluids jet loom emerged in operation, wherein weft yarn is introduced in the wefting insertion passage the shed open that warp thread forms by the fluid of chewing ejaculation from the wefting insertion main jet, and this parallel cut off being separated to chew with main jet to a parallel of introducing when squeezing in the fell with shearing device, described device comprises: be used for being driven into fell and chewing with described main jet at the defect latitude detecting the device of described defect latitude at described wefting insertion passage before separating; Be used under the situation of keeping the injection fluid power, making the device of described loom shutdown; When shutting down, causing by described loom loom to continue the device that prevents the running of described shearing device under the situation of motion and squeeze into described defect latitude because of inertia; Be arranged on side that described main jet chews and the pipeline that entrance and exit is arranged at the two ends of a passage; Be used to transmit the ejector of the yarn of introducing through described pipeline, this ejector comprises a pair of can the contact selectively the yarn of introducing through described pipeline is clipped in the roller between it; Be used to make described yarn and the described main jet introduced through described pipeline to chew second shearing device that is separated; It is characterized in that described ejector further comprises the stepper motor that is coupled and drives with to this roller with a described roller, and described device further comprises the yarn checkout gear, this yarn checkout gear comprises a detection arm, and this detection arm was swept away the passage of the yarn process that described roller transports when described roller is in contact with one another.

In the preferred specific embodiments according to defect latitude treating apparatus of the present invention, this Weft yarn drawout device is made of the driving roller and the driven roller of a pair of separable engagement, be used for clipped weft yarn under said roller engaging pressure, a weft yarn checkout gear that rotates with the Weft yarn drawout device associated further also is provided, and said weft yarn checkout gear is equipped with a rotatable weft yarn detection arm in order to laterally rotatably inswept weft yarn transfer passage under the pairing roller engagement operations state that constitutes Weft yarn drawout device.

Drawn by above-mentioned mechanical type Weft yarn drawout device as the said follow-up weft yarn that is used for drawing from fell the lead-in wire of defect latitude, thus, the defect latitude that is positioned at fell is laterally drawn by the warp thread shed open.Follow the motion of formation in order to the driving roller of the Weft yarn drawout device part of clipped weft yarn under pressure, said weft detector is rotated, therefore, the rotating detection arm of this weft detector is inswept and cross over the weft yarn transfer passage, is transported to Weft yarn drawout device along this passage weft yarn.When having weft yarn on the weft yarn transfer passage, the motion of the rotary scanning of detection arm is suppressed, and the rotating detection arm of result itself is rotated with respect to detector.Relatively rotating with the form in relative rotation of weft detector main body of this detection arm finished.Therefore, although weft yarn clamping roller is in engagement, this detection arm can cover the ON-OFF position of the switch of the weft detector with enough broad edge relative to the zone that the weft detector main body is rotated, so the detection of weft yarn can be finished with high accuracy.

According to instruction of the present invention, the measurement mechanism that is used for the revolution determining motor, drive roller or similar device need not handled successfully or the judgement of failing provides together with relevant weft yarn.Therefore, the maloperation that causes relevant weft yarn to handle the false judgment of success or not can suppress satisfactorily.

In order to draw the defect latitude so that from shed open it is removed fully, the revolution of required stepper motor only depends on the step-length number that presets.Like this, being matched weft length that roller draws can not rely on any measurement and be determined.This method can judge whether reliably successfully to handle weft yarn and not need finally may cause to measure wrong measurement mechanism, for example be used to measure the rotary encoder of the motor rotation that drives roller, measure and drive the contact-making switch that roller itself rotates, measurement is used to drive the timer that the motor that drives the roller rotation continues rotational time, perhaps similar device.In addition, by suitably arranging the number of pulses of command pulse signal in the unit interval, advancing the rotary speed of motor can be optionally and controlled selectively, equally, this means that speed control can such method finish, when weft yarn intensity hour, weft yarn is drawn speed and is reduced, otherwise increases.

By the explanation of following relevant preferred specific embodiment, can more completely understand the present invention.Concrete scheme is only described with embodiment by accompanying drawing.The same reference sequence number is represented identical part in the accompanying drawing.

Fig. 1 is the part section floor map that embodies the concrete structure of a kind of defect latitude treating apparatus of the present invention;

Fig. 2 is the amplification elevation along II among Fig. 1-II line;

Fig. 3 is the amplification profile along III among Fig. 1-III line;

The view of the similar Fig. 3 of Fig. 4, the driving roller driven roller corresponding with it that expression constitutes a Weft yarn drawout device part is in state of contact;

The view of the similar Fig. 2 of Fig. 5, the modified version of the weft yarn checkout gear that adopts in the treating apparatus shown in the presentation graphs 1-4.

Fig. 6 is the perspective view of the major part of defect latitude treating apparatus shown in Figure 1;

Fig. 7 is along passing through weft yarn extraction catheter, the profile of the VII of air flow guide and air-flow injectorpiston-VII line among Fig. 1;

Fig. 8 is the weft yarn extraction catheter shown in Fig. 6 and Fig. 7, follow-on profile of air flow guide and air-flow nozzle structure.

Fig. 9 is the part section floor map that embodies the concrete structure of another kind of defect latitude treating apparatus of the present invention;

Figure 10 is the perspective view of defect latitude treating apparatus major part shown in Figure 9, represents that this device is in the state in the operating process of loom inertia;

Figure 11 represents that weft yarn is by the part perspective view of the state of a pair of roller clamping in the defect latitude treating apparatus shown in Figure 9;

Figure 12 is the perspective view of follow-on major part of the treating apparatus of defect latitude shown in Fig. 9～11;

Figure 13 is the part section floor map of concrete structure that embodies the defect latitude treating apparatus of present invention further optimization;

Figure 14 is Figure 13 along the amplification profile that the X IV-X IV line is got;

Figure 15 is the view of similar Figure 14, and the driving roller driven roller corresponding with it that expression constitutes a Weft yarn drawout device part is in state of contact;

Figure 16 is the view of similar Figure 13, the just derivative state of expression defect latitude;

Figure 17～19 illustrate weft yarn extraction catheter structure shown in Figure 13 respectively or arrange various follow-on profiles.

Below, with reference to the accompanying drawings the embodiment that the present invention is specialized is elaborated.

Chewing 2 with reference to 1, one wefting insertion main jet of figure is contained on the end of slay 1.By weft yarn reel pipe 5 supplies and around the weft yarn Y that a round drum 4 twines be introduced into the wefting insertion main jet chew 2 and chew from the wefting insertion main jet with the synchronous state of wefting insertion timing under spray into the weft yarn guide channel that forms by improved reed 6 (Fig. 6), wherein, said drum 4 has determined that weft length is measured and the weft yarn coiling surface of storage component 3, and said reed 6 is vertically mounted on the slay 1.

Relatively rotate between pipe 5 and the circle drum 4 in order to keep round drum 4 transfixions and to allow weft yarn to reel, this pipe 5 is contained on the rotatable support tube 7, and the weft yarn Y that enters rotatable support tube 7 from a bobbin (not shown) is directed to weft yarn coiling pipe 5.Draw weft yarn from drum 4, by the intersecting of the weft yarn twisting surface of the weft yarn holding member 9 on cam control lever 8 one ends that are contained in pivot suspension and circle drum 4 (combination) with separate (disengaging) and control.The pivot motion of cam control lever 8 is finished under the effect that is installed in the cam (not shown) on the driving shaft (not shown), and the rotation of this driving shaft and the operation of loom are synchronous.Rotatablely moving of this driving shaft is delivered on the rotatable supporting tube 7 by timing belt wheel 10,12 and timing belt 11, therefore, in the process of circle drum 4 rotations, by reel pipe 5 of weft yarn weft yarn Y is wound on the drum 4.

An o 13 is contained near the top of cam control lever 8 one ends, and the drive rod 13a of o 13 is towards cam control lever 8 location.Under the state that the drive rod 13a of o 13 stretches out, the free end of drive rod 13a leans against an end of cam control lever 8 under pressure, like this, weft yarn holding member 9 is in the state that keeps quadrature or combine with the weft yarn coiling surface of round drum 4 mentioned above.In this method, weft length measurement and storage component 3 and o 13 are worked in coordination and are formed a wefting insertion inhibition mechanism jointly.

When the weft yarn Y that chew 2 ejections from the wefting insertion main jet are incorporated into when being positioned at main jet and chewing the termination of fell W of 2 opposite sides exactly, form the modified reed 6 of weft yarn guide path in individual by means of one, the beaten up fell W of fabric of weft yarn ₁Or on the fabric W.Subsequently, the weft yarn that has been driven into is chewed electromagnetic type that 2 homonymies install by one with the wefting insertion main jet and has been knitted Weft cutting-off apparatus and cut off, and then carries out the operation of weaving subsequently.

When generation was unusual in weft yarn is introduced, for example weft yarn did not have arrival to be positioned at the fell termination that the wefting insertion main jet is chewed offside, and the gauge head 15 that is installed in the offside appropriate location detects the fault that weft yarn does not have arrival, sends the wefting insertion fault-signal thus.According to this detection signal from gauge head 15, the operation locking or the parking of a loom control computer C instruction loom.But in actual applications, when detecting the instruction parking according to the weft yarn transmission failure, under effect of inertia, loom bent axle (not shown) will be rotated further about an about circle.More precisely, it is to send in fabric W is between moving period forward at slay 1 revolution extreme position shown in the solid line from Fig. 1 that this weft yarn is introduced fault detection signal, the fabric W thereby processed defect latitude ' Y ' is just once beaten up.After this, slay 1 reciprocally turns back to the position shown in Fig. 1 chain-dotted line that is in close proximity to stop position.Simultaneously, prior to this time point, loom control computer C stops to knit the rupturing operation of Weft cutting-off apparatus 14, otherwise on this time point, the defect latitude will be cut off.Therefore, the beat up fell W of fabric W ₁Defect latitude ' Y ' still keep and stay the wefting insertion main jet and chew 2 weft yarn and be in connection status.And, in this connection, be readily appreciated that breaking away from the Weft cutting-off apparatus working range by means of the mobile weft yarn of other suitable devices can guarantee that also weft yarn is not damaged.

Basically the microscler weft yarn extraction catheter 16 that extends in parallel with the wefting insertion direction is installed in the wefting insertion main jet that is in backhaul extreme position state as shown in the figure and chews in 12 the wefting insertion passage back region.And on weft yarn extraction catheter 16 opposites, be disposed at an air-flow nozzle 17 that links to each other with airflow apparatus is installed on the support seat 18 on the slay 1, so that wefting insertion passage mentioned above passes through between weft yarn extraction catheter 16 and air-flow nozzle 17.Air-flow nozzle 17 is equipped with a playpipe 17a, the end of this playpipe 17a bends towards weft yarn extraction catheter 16, an air flow guide 19 that is essentially C shape is fixedly mounted in the crooked end of playpipe 17, so that the weft yarn extraction channel is on its upright position in the restriction air flow guide 19.By the wefting insertion main jet chew 2 penetrate or air-flow effect that the weft yarn of ejection produces between air-flow nozzle 17 and weft yarn extraction catheter 16 under be input in the weft yarn extraction catheter 16.Like this, being blown into the weft yarn of weft yarn extraction catheter 16 can be by a fixed blade 20 across the fixed installation of the free end of C shape air flow guide 19.

The left side can be seen in the drawings, and the opposite of weft yarn extraction catheter 16 outlets is suction pipes 21 that link to each other with a suction system, and places an air guide member 22 between suction pipe 21 and weft yarn extraction catheter.Stepper motor 23 is configured in the below between air guide member 22 and the weft yarn extraction catheter 16.In addition, one drives the top that roller 24 directly is installed in stepper motor 23.Drive pulley 23a who links to each other with stepper motor 23 coupling is operably connected with driven pulley 24b on the bolster 24a that is installed in driving roller 24 by a timing belt 25.

Above driving roller 24, its longitudinal axis of cylinder 26(of vertical installation can prolong in vertical direction), and at the driven roller 28 of a swivel bearing in support 27 of opposite configuration that drives roller 24, said support 27 is affixed with the external part safety of the drive rod 26a of cylinder 26 reliably, when air cylinder driven bar 26a was protruding from cylinder 26, driven roller 28 can be pressed on and drive on the roller 24 like this.Bolster 29 rotatably mounted unsettled vertically downward plate shape support units 30 that cross out from cylinder 26, a gathering sill that is suitable for holding slidably guide finger 27a is formed at the bottom of this support unit 30, and gathering sill 30a is installed in support 27 and crosses out thus.Limit switch type weft detector 31 with detection arm or sensor arm 3/a is contained on the supporting plate 30, and this detection arm or sensor arm 3/a should support like this: even the weft yarn transfer passage that limits between horizontal sweep air guide 22 of this arm energy and the suction pipe.

Received by weft yarn processing controls electronic computer C from the detection signal of weft detector 31 outputs.As narration above, the weft yarn detection signal that this computer C sends according to gauge head 15 is to sending operational order with the

driving loop

33 and 34 that a three-way magnetic valve 32 links to each other with stepper motor 23 respectively.According to expression fabric W width is the input data of the length of derivative defect latitude Y ', the step-length number N that stepper motor must be carried out is obtained and is stored in weft yarn process computer C computing, so a command pulse signal of representing the step-length number N that computing is obtained is applied to stepper motor 23.

Now, suppose to break down in wefting insertion, the wefting insertion main jet is chewed 2 and is stopped to spray.Along with slay 1 is parked on the position of chain-dotted line indication among Fig. 1, knitted Weft cutting-off apparatus and quit work simultaneously.Therefore, make the weft yarn Y that connects defect latitude Y ' be prevented from introducing fabric.On the other hand, the fell W that beaten up ₁The defect latitude be in the wefting insertion main jet and chew 2 states that are connected.The wefting insertion fault detection signal that gauge head 15 sends, weft yarn processing controls computer C is in and prepares to receive the state that is sent signal by weft detector 31, and air-flow of above being chatted and suction system (not shown) start under the instruction of loom control computer C, like this, between air-flow nozzle 17 and weft yarn extraction catheter, produce the crossflow of introducing in the passage.The wefting insertion fault detect to caused by loom stop during this period of time in, weft yarn holding member 9 is once removed (separations) the drum 4 and then is kept justifying drum 4 quadratures or bonding state from circle.This bonding state by under the instruction of loom control computer C by solenoid 13 excitatory keeping.The characteristic that can separate from rotary drum 4 according to above-mentioned weft yarn holding member 9 and is once introduced isometric weft yarn Y ₁Be stored on the rotary drum 4 and be in the state be drawn out prepared, this weft yarn forces to introduce the import 16b of weft yarn extraction catheter 16 subsequently.In the time interval before caused by loom stop, all are wrapped in the weft yarn Y on the rotary drum 4 ₁All drawn and delivered in the weft yarn extraction catheter.Loom reversing then, slay 1 returns to the extreme position of backhaul.Like this, formed the race of warp thread T, thus, the defect latitude has been broken away from by the state of clamping tightly between the upper and lower layer warp thread T.

Pressure enters the weft yarn Y of weft yarn extraction catheter 16 ₁The output of deviation ground importing weft yarn extraction catheter or outlet and eject under the guide effect of the inner passages that form of conduit 16 from this output or outlet.Export the weft yarn Y that ejects from weft yarn extraction catheter 16 ₁The end portion of bending before caused by loom stop, arrive suction pipes 21 by air conduit 22.Weft yarn process computer C sends initiating signal to the reversing of three-way magnetic valve and loom successively.Therefore, as shown in Figure 4, drive roller 24 and be pressed against on the driven roller 28, as a result weft yarn Y ₁Be clamped under pressure between roller 24 and 28.When driven roller 28 moved downward, owing to be to be slidingly matched between guide finger 27a and the gathering sill 30a, supporting plate part 30 tilted to the position that chain-dotted line is indicated by solid line position shown in Figure 2, simultaneously, and the horizontal inswept weft yarn Y of detection arm 31a ₁Transfer passage.Like this, this detection arm 31a by a pair of

roller

24 and 28 and suction pipe 21 between the weft yarn Y of tensioning ₁Cause with respect to angle of weft detector 31 rotation itself, thus, the detection signal that the indication weft yarn exists is transported to weft yarn processing controls computer C from detector 31.

The detection signal that the indication weft yarn that weft yarn processing controls computer sends according to weft detector 31 has existed sends operational order to stepper motor and makes it rotate one group of step-length to count N.Like this, one of stepper motor 23 rotation is counted the consistent circumferential distance of N with step-length, so that at weft yarn Y ₁Be in the state that clamps between

roller

24 and 28 and drive

driving roller

24 and 28 rotations of driven roller down.Because weft yarn Y ₁By the rotation input suction pipe 21 of

roller

24 and 28, the weft yarn Y of tensioning ₁Cut off so that chew 2 separation (Fig. 2) by static blade or blade, thereby be positioned at fell W with the wefting insertion main jet ₁The defect latitude also chew 2 and separate with the wefting insertion main jet.

The circumference amount of spin of counting consistent driving roller 24 of N and driven roller 28 with step-length is definite like this, promptly with extended to the summation that is positioned at the length of knitting the fell end on Weft cutting-off apparatus 14 1 sides and fabric width by the weft yarn extraction catheter consistent.In the process of removing defect latitude Y ', because stepper motor 23 corresponding step-lengths are counted N rotation end and weft yarn are damaged, as shown in Figure 4, the head end of defect latitude is positioned at the inside of weft yarn extraction catheter 16, and is staying under the tension force effect between

roller

24,28 and the suction pipe 21.Correspondingly, weft detector 31 sends to weft yarn processing controls computer C and indicates the detection signal that weft yarn exists, count after rotation is finished one by one of N in stepper motor 23 corresponding step-lengths then, computer C judges that weft yarn is handled and successfully finishes according to indicating information that weft yarn exists.Then, weft yarn processing controls computer C sends an expression of being carried out by stepper motor subsequently and presets the pulse command signal that the rotation step-length is counted n.

In order to draw the defect latitude so that from shed open it is removed fully, the revolution of required stepper motor only depends on that the step-length that presets counts N.Like this, being matched weft length that

roller

24 and 28 draws can be determined and not rely on any measurement.This method can judge whether reliably successfully to handle weft yarn and not need finally may cause to measure wrong measurement mechanism, for example be used to measure the rotary encoder of the motor rotation that drives roller 24, measure and drive the contact-making switch that roller 24 itself rotates, measurement is used to drive the timer that the motor that drives roller 24 rotations continues rotational time, perhaps similar device.In addition, by suitably arranging the number of pulses of command pulse signal in the unit interval, the rotary speed of stepper motor can be optionally and is controlled selectively, same, this means that speed control can such method finish; When weft yarn intensity hour, weft yarn is drawn speed and is reduced, otherwise increases.

The remainder of the defect latitude of drawing when all shed opens that between warp thread, forms by

pairing roller

24 and 28 the time, the detection arm 31a of weft detector 31 forwards the position shown in the chain-dotted line to by the position shown in Fig. 2 solid line, and weft detector 31 sends the detection signal of the no weft yarn of indication to weft yarn processing controls computer C subsequently.Finish in the process of stepper motor 23 operations according to the instruction of counting the n rotation with step-length, when weft yarn processing controls computer C receives the detection signal of the no weft yarn of indication, make and successfully finish the judgement of handling defect latitude remainder, subsequently, control computer C sends the signal that loom is reset.Triggering the operating period of counting the stepper motor of n classification rotation according to instruction with step-length, if confiscate no weft yarn signal, the judgement that the defect latitude remainder of dealing with has so been failed, in this case, computer sends the idsplay order that the failure of residue defect latitude is handled in indication to a display unit (not shown), and does not send the instruction that loom is reset.According to handling the detection whether relevant weft yarn exists with the residue weft yarn, influence the situation of relevant weft yarn processing judgement, for example be wrapped in also can be detected on the detection arm 31a for the faulty operation of weft detector itself or weft yarn.In this case, the ongoing operation that is used to handle the stepper motor 23 of weft yarn remainder also can utilize a timer control, the accurate measurement that do not need length because stepper motor rotates to that end of a period can be done.

The present invention is in no way limited to specific embodiments recited above.For instance, limit switch type weft detector 31 can be replaced by the photoelectricity weft detector that is contained in air guide member 22 or the weft yarn extraction catheter.In this case, it is successful drawing the defect latitude the shed open of judgement proof between warp thread of doing based on the end of stepper motor rotation N step-length, and the loom operation can be reset immediately.On the other hand, break down when the processing of residue weft yarn, in loom operating period, the reason of fault can be excluded.In addition, do not import width of fabric, count N and can directly import step-length.Similarly, the angle of rotation can alternately be imported.In addition, suitable change-speed gearing of configuration between stepper motor 23 and driving roller 24 increases the step-length that presets and counts N, so that the rotation of control step motor 23 better.Should be noted also that the present invention is equally applicable to remove the weft yarn of caused by loom stop instantaneous introducing before, so that prevent to form skew or crosspiece, otherwise these faults are to occur.

In the situation of above-mentioned specific embodiments, when with respect to the detection arm 31a that rotates of weft detector 31 itself when the initial position that is positioned at OFF district enters the ON zone by the OFF-ON position of the switch, produce the detection signal that sends by detector 31 as the indication weft yarn existence of the triggering signal of weft yarn processing controls computer.It should be noted that in this respect, because weft detector 31 bodies self also can be around bolster 29 rotations, follow the rotation of weft detector body, the movement locus zone of rotatable detection arm 31a end can enough cover the weft yarn extraction channel, even it is relatively very wide to have this passage at an edge.Therefore, because and the weft yarn Y in the weft yarn extraction channel that extends between air guide member 22 and the suction pipe ₁In conjunction with, can cover the OFF-ON position of the switch with respect to relatively rotating of weft detector 31 rotatable detection arm 31a own is regional with an edge.Thus, rotatable detection arm 31a can be transformed into the ON state by the ON-OFF position of the switch and can not break down by the corresponding to OFF state of starting point from the OFF zone.In other words, as long as weft yarn Y ₁Occur extending between air guide member 22 and the suction pipe and drawing in the passage of weft yarn, the detection signal that the indication weft yarn exists will send from weft detector and can not break down, and therefore, follow-up weft yarn is handled operation and can be finished reposefully.

In said similar method, the detection whether the residue end of defect latitude Y ' exists can realize effectively, therefore, loom is transformed into resets and can finish in order.

Certainly, the present invention is not subjected to the restriction of said apparatus.For instance, cramp bar 36 can be contained on the bolster 35 that stretches out from cylinder 26 rotatably, and weft detector 31 can be contained on the cramp bar 36, in Fig. 5, an arc guide 37 can be installed on the sidewall of detector 31 so that cooperate with rolling member 38 on the support 27 that is installed in driven roller 28.In this structure, cramp bar 36 by a unshowned spring push rolling member 38 to.Because driven roller 28 moves downward the rolling member 38 that causes and the engagement between the arc guide 37, rotate detection arm 31a and can finish the rotation sweep operation with the method for above narrating.

In the embodiment of above narrating, the pivot of weft detector 31 is positioned at from weft detector 31 main bodys to be had on the position of distance slightly., people will know, and are consistent with the detection arm pivot that rotates relative to weft detector 31 bodies by arranging this pivot, can further improve the accuracy that detects weft yarn.Certainly, the present invention can be applied to the removal of the weft yarn of instantaneous introducing before the caused by loom stop and handle, so that the crosspiece that forms when preventing caused by loom stop.

In the above-mentioned specific embodiments, can see that striding across the weft yarn extraction catheter that the wefting insertion passage is configured in air-flow nozzle 17 opposites constitutes like this from Fig. 1,6 and 7, there is an intake 16b who communicates with guide channel 16a its front, and forms an outlet 16c in the upper left end of weft yarn extraction catheter 16.In addition, form the guide surface 16d of an inclination on the rear wall of the guide channel 16a the import 16b near, so that the circulation of air cross section of guide channel 16a is reduced gradually to outlet 16c direction.

Though Fig. 1 does not illustrate to Fig. 4, said roller bearing support 31 can vertically be bearing in slidably and be installed in cylinder 26 drive rods and stretch out on the supporting plate 39 on the end, and as Fig. 6 signal, wherein, bearing support 27 can push drive roller 24 to by compression spring 40.In this method, or the making a concerted effort or only be the clamping force that the pressure that saves the cylinder 26 of spring 40 has formed two

rollers

24 and 28 of the pressure of the pressure of spring 40 and cylinder 26.

As shown in Figure 1, in the defect latitude treating apparatus that weft yarn extraction catheter 16 with guide channel 16a and air flow guide 19 are housed, prevented its vertical proliferation from the air flow of air-flow nozzle 17 ejections by means of air flow guide 19, and passed the import 16b that the wefting insertion passage flows to weft yarn extraction catheter 16 reposefully through adjusting.Because this levelling effect, certainly will converge and lead at an easy rate to import 16b at that from the jet-stream wind of air-flow nozzle 17.Therefore, the spray-hole of chewing from the wefting insertion main jet extends to the fell W of fabric W ₁Weft yarn Y ₁Carry by this air flow of having aligned via air flow guide and to transfer to import 16b, so weft yarn Y ₁Crooked end can be imported into import 16b and can not break down.In this method, inclined surface 16d to the guide effect that jet-stream wind rose under, force to introduce the weft yarn Y of guide channel 16a ₁ Crooked termination exit 16c and spray to suction pipe 21 from this outlet 16c.In this method, all are wrapped in the weft yarn Y on the round drum 4 ₁Be pumped into the weft yarn extraction catheter fully until caused by loom stop.

Do not need explanation, the present invention never only limits to above-mentioned specific embodiment.For instance as shown in Figure 8, can utilize a plurality of wefting insertion main jets chew 2 ' and 2 " many weft yarns.In this case, the air-flow nozzle 17 of upwards jet airstream separately ' and the below of 17 " configurable chew 2 ' and 2 " at corresponding weft yarn main jet.Simultaneously weft yarn extraction catheter 16 also can cross over the wefting insertion passage be configured in air-flow nozzle 17 ' and 17 " the opposite.Air flow guide 19 also can be configured in air-flow nozzle 17 ', 17 " and between the weft yarn extraction catheter 16, with reach upwards levelling from nozzle 17 ', 17 " the purpose of air-flow.An Electromagnetic Drive cutter can be installed as the weft yarn cutter that is used to remove weft yarn in this device.In addition, draw as weft yarn or the

pairing roller

24 and 28 of weft yarn receiving system can be replaced by batching apparatus.In addition, prevent to form crosspiece during for the caused by loom stop that prevents to stop except being used to handle the defect latitude, the present invention can be applied to the removal of instantaneous introducing weft yarn before the caused by loom stop equally.

Below, the preferred specific embodiments of 9 to 11 explanation another ones with the identical or consistent part of those specific embodiments mentioned above, illustrates and will simply or be omitted with reference to the accompanying drawings.Be fixedly mounted on reference to 9 to 11, one in figure and support the air-flow nozzle 17 of seat 18 dispose like this: a spray-hole 17b who forms on the playpipe 17a that constitutes nozzle is directly towards the injection channel of the wefting insertion nozzle 2 that disposes above it.

Be fixedly mounted on directly be disposed at the wefting insertion main jet chew the below slay 1 rear surface be a support unit 41 that stretches out three supporting arms, this supporting arm 41a, 41b and 41c end bending is separately stretched to the wefting insertion main jet and is chewed 2 top.A weft yarn extraction catheter 16, its import decurvation is installed on the end of first supporting arm 41a.More particularly, the import 16b of weft yarn extraction catheter 16 crosses over the wefting insertion main jet and chews 2 injection via configuration on the opposite of the spray-hole 17b of air-flow nozzle 17, and import 16b and wefting insertion main jet are chewed between 2 the spray-hole cutter assembly 42 is installed simultaneously, as weft yarn Y ₁By

pairing roller

24 and 28 when drawing, this cutter assembly cut off be in tensioning state weft yarn 1.An air guide member 22 is installed in the end of second supporting arm 41b, and a suction pipe 21 is installed on the 3rd the supporting arm 41c simultaneously.The import of the import of air guide member 22 and outlet and suction pipe 21 is arranged in from the injection channel of the outlet 16c extension of weft yarn extraction catheter 16.The port of export of suction pipe 21 bends towards a litter-bin 43 that is configured in slay wobble area front, and wherein, nozzle 44 that links to each other with compressed air source communicates with the sweep of suction tube 21 and be relative with its outlet.

In the back of slay 1 wobble area, a stepper motor 23 is installed on the loom frame, one of the top direct configuration of this stepper motor 23 drives roller 24.Wherein, the drive pulley 23a of stepper motor 23 by timing belt 25 operationally be installed in the driven pulley 24b that drives on roller 24 bolsters and link to each other.Be directly installed on to cylinder 26 its axis normal the top that drives roller 24, this cylinder 26 has a drive rod 26a, its free end and bearing support 27 Joints that support a driven roller 28 rotatably, this roller 28 is relative so that be pressed on the roller 24 under the driving pressure of cylinder 26 with driving roller 24.Supporting plate 30 is by a bolster 29 that crosses out from cylinder 26 hanger bearing rotatably, and the lower position of this supporting plate 30 has one to hold guide finger 27, and with its gathering sill 30a that can fix and be slidingly matched.In addition, the weft detector 31 with detection arm 31a is installed on the supporting plate 30.

The injection channel that the position that disposes between the spray-hole 17b of air-flow nozzle 17 and the import 16b of weft yarn extraction catheter 16 relation and between the extend relative position of wefting insertion passage in other words remains unchanged, this distance between spray-hole 17 and the import 16b is reduced and can be in the wefting insertion operation any obstacle of appearance.Therefore, the diffusion energy of aerojet is little beyond expectationly between spray-hole 17b and the import 16b, and like this, jet-stream wind can all enter guide channel 16a and not laterally diffusion.Like this, although loom remains in operation, be connected defect latitude Y ' weft yarn Y afterwards under effect of inertia ₁Import 16b can be forced to introduce reliably.So just guarantee to allow to reduce the size of weft yarn extraction catheter 16 reliably, in other words, comprise that the gross weight of the slay 1 that various parts are installed reduces to obtain the remarkable advantage of high speed operation.

Certainly, the present invention not only is confined to specific embodiments recited above.For instance, air-flow nozzle 17 can be configured in the wefting insertion main jet chew 2 ' and 2 " front (as shown in figure 12; in the swaying direction of slay 1); and weft yarn extraction catheter 16 be configured in the wefting insertion main jet chew 2 ' and 2 " centre and back (according to the direction of motion of slay 1), here, the import 16b of the spray-hole 17b of air-flow nozzle 17 and weft yarn extraction catheter 16 is chewing 2 ' and 2 " is crossing over the injection channels that the wefting insertion main jet is chewed on the constant position with respect to the wefting insertion main jet.In this case, the situation of embodiment as indicated above is the same, and the weft yarn that enters weft yarn extraction catheter 16 can be transported to reliably has the

pairing roller

24 and 28 that function was drawn or batched to machinery.Be contained in air-flow nozzle 17 free-ended air flow guide 19 blade 42 that is used to remove weft yarn is housed, weft yarn is cut off by blade 42 under the effect of drawing of pairing rotor 24 and 28.Weft yarn is introduced to the detection of weft yarn extraction catheter 16 can be not shown by being contained in air guide member 22() in optical pickocff or can select by mechanical device detection arm 31a(Figure 10 for example) finish.

Figure 13 to shown in Figure 16 be the other specific embodiments of the present invention.Consult accompanying drawing, first order air-flow nozzle 17 leaps that link to each other with an airflow apparatus are chewed the 2 wefting insertion passages that limit by the wefting insertion main jet and are installed on the slay 1 on the opposite of weft yarn extraction catheter 16, and the horizontal air-flow that enters import 16b by the wefting insertion passage produces by driving airflow apparatus.Chew 2 weft yarns that penetrate from the wefting insertion main jet and be imported into weft yarn extraction catheter 16 under the air-flow effect that produces between air-flow nozzle 17 and the weft yarn extraction catheter 16, the weft yarn that enters weft yarn extraction catheter 16 under the air-flow effect is installed in by one that the wefting insertion main jet chews that 2 free-ended Electromagnetic Drive Weft cutting-off apparatus 45 cut off to be separated so that chew with the wefting insertion main jet.

With the import 16b of air-flow nozzle 17 relative configurations near the guide channel rear wall on form an inclined surface 16d so that under the guide effect of this surface 16d, the outlet 16c of the air guide weft yarn extraction catheter 16 that ejects from air-flow nozzle 17.Guide surface 16d trailing edge with the outlet 16c with high position on the configuration second level air-flow nozzle 46, this nozzle 46 export-oriented 16c.Said air-flow nozzle 46 links to each other with airflow apparatus mentioned above.In having the defect latitude treating apparatus of an air-flow nozzle 46, force the weft yarn Y of input guide channel 16a ₁The air flow that is ejected by the second level air-flow nozzle 46 in weft yarn extraction catheter 16 is sent to outlet 16c, and thus, the free end of this weft yarn bending sprays from outlet 16c and enters conduit 21.The air-flow that ejects from second level air-flow nozzle 46 produces an additional air flow near the guide surface 16d of import 16b and inclination.This additional air flow plays swabbing action near the weft yarn that is in the import 16b.In addition, blow to weft yarn Y ₁Air-flow under the effect of inclined surface 16d to outlet 16c skew, under the acting in conjunction of the air flow of skew and additive air stream, introduce the weft yarn Y of import 16d ₁Be transported to reposefully in the air flow that is ejected by air-flow nozzle 46, therefore, the weft yarn quilt is exit 16c reliably.

As the weft yarn Y that ejects from outlet 16c ₁The free end of bending when arriving air guide member 22, weft yarn Y ₁Detected by a weft detector that comprises photocell 47 and light receiving element 48.According to the detection signal of such generation, the motor 23, cylinder 26 and the weft yarn cutter 45 that are used to remove weft yarn enter mode of operation.Therefore, as shown in figure 15, weft yarn Y ₁Be cut off to chew 2 and separate with the wefting insertion main jet.Simultaneously, driven roller 28 is compressed against on the driving roller 24 of positive rotation, like this, and along with driven roller 28 begins rotation, weft yarn Y ₁Pressure is clipped in the roller 24 and 28 of pairing.Because rotation weft yarn Y by roller 24 and 28 ₁Draw towards suction pipe 21, as shown in figure 16, said defect latitude Y ' and fell W ₁Separate.In other words, force follow-up weft yarn Y ₁Enter feeding effect (wherein, the follow-up weft yarn Y of the air flow of weft yarn extraction catheter 16 ₁Draw the lead-in wire of defect latitude from fell as a realization), be converted to the conveying effect of the air-flow that ejects from air-flow nozzle 46 from air-flow nozzle 46, therefore, weft yarn Y ₁Advance to the position of mechanically drawing by driving roller 24 that rotates and driven roller 28.This mechanical weft yarn clamping action is finished reliably by pairing roller 24 and 28, so, remove or draw the defect latitude Y ' that is positioned at fell and can finish and obtain very high success rate.

For the structure of specific embodiment, can be as the weft yarn amount of drawing by photocell 27, light receiving element 28 and a rotary encoder associating are measured exactly, and therefore, the relevant judgement whether defect latitude Y ' energy is successfully drawn is made according to this measurement result.In other words, up to all extracting out, make and draw the judgement that defect latitude Y ' satisfactorily finishes in predetermined extraction amount.On the other hand, if the amount of drawing the defect latitude not in above-mentioned scope, then weft yarn is damaged in wefting insertion or spill process takes place, the defect latitude also will be removed thus.There is the defect weft yarn that stays when therefore, having prevented the loom reversing.In this method, float can be avoided effectively.

Need not point out that the present invention is not limited to the specific embodiments of narrating above.For instance, outlet 16c can be positioned at the end face core of weft yarn extraction catheter 16, and the outlet of air-flow nozzle 46 can be positioned at and export 16c with on the high position, as shown in figure 17.In addition, in weft yarn extraction catheter 16, a plurality of air-flow nozzles 46 of export-oriented 16c can be installed, as shown in figure 18.Said oriented surface 16d can omit, as shown in figure 19.

Can expect to understand the present invention by top explanation.Clearly, do not breaking away from the spirit and scope of the present invention or under the prerequisite of not sacrificing major advantage of the present invention, can be in shape, make various variations in structure and the arrangement, form as described above only is the preferred or typical specific embodiments of the present invention.

Claims

1, a kind of method of handling at the defect latitude of fluid jet loom emerged in operation comprises the following steps: the defect latitude is being squeezed into fell and the defect latitude the detection wefting insertion passage before downcut in the yarn source; When detecting the defect latitude, under the situation of keeping fluid jet power, make caused by loom stop and stop described defect latitude is downcut from described yarn source, and in other cases since loom can under effect of inertia, continue to move parallel will be cut; One section yarn of next section parallel that will become detected defect latitude in other cases is blown into a conduit, and described one section yarn is taken the let-off gear(stand) that comprises the motor-driven roller through extraction channel, described conduit is set at the side of normal wefting insertion passage; It is characterized in that making the stepper motor that drives described motor-driven roller to turn round predetermined step number, whether be in by the detection yarn subsequently and determine in the described extraction channel whether the defect latitude is correctly regained so that described one section yarn is downcut from the yarn source.

2, the device that is used for the defect latitude of handling of fluids jet loom emerged in operation, wherein weft yarn is introduced in the wefting insertion passage the shed open that warp thread forms by the fluid of chewing ejaculation from the wefting insertion main jet, and this parallel cut off being separated to chew with main jet to a parallel of introducing when squeezing in the fell with shearing device, described device comprises: be used for being driven into fell and chewing with described main jet at the defect latitude detecting the device of described defect latitude at described wefting insertion passage before separating; Be used under the situation of keeping the injection fluid power, making the device of described loom shutdown; When shutting down, causing by described loom loom to continue the device that prevents the running of described shearing device under the situation of motion and squeeze into described defect latitude because of inertia; Be arranged on side that described main jet chews and the pipeline that entrance and exit is arranged at the two ends of a passage; Be used to transmit the ejector of the yarn of introducing through described pipeline, this ejector comprises a pair of can the contact selectively the yarn of introducing through described pipeline is clipped in the roller between it; Be used to make described yarn and the described main jet introduced through described pipeline to chew second shearing device that is separated; It is characterized in that described ejector further comprises the stepper motor that is coupled and drives with to this roller with a described roller, and described device further comprises the yarn checkout gear, this yarn checkout gear comprises a detection arm, and this detection arm was swept away the passage of the yarn process that described roller transports when described roller is in contact with one another.