CN103370463A

CN103370463A - Method and device for feeding weft thread

Info

Publication number: CN103370463A
Application number: CN2011800603323A
Authority: CN
Inventors: P.普伊桑特
Original assignee: Picanol NV
Current assignee: Picanol NV
Priority date: 2010-12-14
Filing date: 2011-11-14
Publication date: 2013-10-23
Anticipated expiration: 2031-11-14
Also published as: WO2012079877A2; EP2652186A2; WO2012079877A3; BE1019702A3; CN103370463B

Abstract

Method and device for feeding weft thread (2) in a weaving machine, wherein a reference moment in the weaving cycle is determined that is a measure of the stretching moment in which during the insertion of weft thread (2) into the weaving shed (6) the weft thread (2) stored in the storage element (11) changes from stored condition into stretched condition and wherein a thread holder (20) arranged between a prewinder (3) and a storage element (11) is controlled by a control unit (31) as a function of the determined reference moment in the weaving cycle.

Description

Be used for supplying with the method and apparatus of weft yarn

Technical field

The present invention relates to a kind of method for supply with weft yarn at loom.The invention still further relates to a kind of device that is used for supplying with at loom weft yarn that adopts the method according to this invention that is designed for.

Background technology

From US 4,947,898 or WO 2010/006774 A2 become known for weft yarn is supplied to the Weaving shed device of air-jet loom.This device comprises that this storage latitude element comprises the chamber of being defined by sidewall for the storage latitude element that stores weft yarn, and this chamber has the entrance and exit for weft yarn.In sidewall, be provided with the opening that allows compressed air to overflow.This device comprises the clamping element for clipped weft yarn, and this clamping element is arranged near the outlet in chamber.Clamping element can be closed being used for storing weft yarn, and can open to be used for removing weft yarn.Clamping element also can be with the compressed-air actuated outlet sealing that is used in chamber.This device also comprises for weft yarn being jetted to the blowing device of storage latitude element, so that weft yarn can be stored in the latitude element.Blowing device is arranged near the entrance of storage latitude element, and is used for weft yarn is jetted to storage latitude element with along the direction winding-up weft yarn from the entrance of storage latitude element to outlet.In addition, this device comprises for the weft accumulator that discharges weft yarn.This device allows weft yarn to be stored in the latitude element under low-tension, so that under low-tension, can remove weft yarn from storage latitude element, thereby allow the weaving speed that reaches higher, perhaps with lower air consumption and lower tension force with weft yarn be incorporated into Weaving shed in.Weft accumulator allows to discharge weft yarn with suitable length.

For example from US 4,947,898 and the known a kind of Weaving shed method for weft yarn being supplied to air-jet loom of WO 2010/006774 A2.Such method has been described the yarn retainer to weft accumulator, the blowing device of storage latitude element, the yarn retainer of storage latitude element and the control of main Apparatus for spraying and jetting particulate materials.Such method has following shortcoming: if certain weft yarn is fed to storage latitude element too slowly, then this weft yarn will be incorporated into too slowly Weaving shed in so that weft yarn Weaving shed opposite side of too late arrival in weaving cycle, and the weft yarn fault may appear.Such method also has following shortcoming: if certain weft yarn is fed to storage latitude element too soon, then this weft yarn will be incorporated into too soon Weaving shed in, so that weft yarn too early arrives Weaving shed opposite side in weaving cycle, and so that the weft yarn that arrives stands high-tension, thereby breakage of weft may occur.

Summary of the invention

The object of the invention is to improve this method so that weft yarn is fed to storage latitude element under relatively low tension force and with desired speed, and so that weft yarn under relatively low tension force and with desired speed be incorporated into Weaving shed in.

This purpose is by the method realization that is used for supplying with at loom weft yarn, wherein from weft accumulator discharge one section weft yarn in case with described weft yarn be incorporated into Weaving shed, wherein the weft yarn from weft accumulator is fed to storage latitude element via the entrance that stores up the latitude element, wherein the outlet via storage latitude element removes weft yarn from storage latitude element, so that with described weft yarn be incorporated into Weaving shed in, wherein begin weft yarn is incorporated into Weaving shed in before, storing weft threads is in storage latitude element, wherein at least during a part that weft yarn is incorporated into the period in Weaving shed, carry out simultaneously the storage of weft yarn and remove, wherein in weft yarn, store at least and remove when finishing, with will be fed to from the weft yarn of weft accumulator storage latitude element and compare, the weft yarn that will be stored in quickly in the latitude element removes from storage latitude element, so that during the period that weft yarn is incorporated in Weaving shed, stretching in weaving cycle constantly, the weft yarn that is stored in the latitude element becomes extended state from storing state, wherein will stretch constantly to be defined as with reference to constantly.

In the context of the present specification, term " stretch constantly " be illustrated in weft yarn be incorporated into Weaving shed in during the weft yarn that is stored in the latitude element become moment the weaving cycle of extended state from storing state.In the context of the present specification, term " storing state " expression is stored in the latitude element with unstretched condition, for example is stored in the latitude element with the zigzag formula." reference constantly " is measuring of " stretching constantly ", not necessarily must be in full accord with " stretching the moment " but as further obvious from this specification, be somebody's turn to do " with reference to constantly ".

The invention provides following advantage: reference of measuring by moment of determining to stretch in storage latitude element as the weft yarn in the weaving cycle can affect constantly with reference to constantly or set impact with reference to concrete control parameter constantly, so that control is with reference to the moment.In one embodiment, in order to control with reference to constantly, make velocity adaptive that weft yarn is fed to storage latitude element be incorporated into speed in Weaving shed in weft yarn.

According to preferred embodiment, by opening the second yarn retainer that is arranged between weft accumulator and the storage latitude element, control the beginning that weft yarn stores in storage latitude element, wherein constantly control opening of the second yarn retainer according to the reference in the weaving cycle.This means according to the speed that weft yarn is fed to storage latitude element and according to the speed that weft yarn is incorporated in Weaving shed, come to open the second yarn retainer that is arranged between weft accumulator and the storage latitude element in the suitable moment, so that the expectation in weaving cycle constantly, the storing state of weft yarn from storage latitude element becomes the extended state in the storage latitude element.During this also allows in being stored in the latitude element and be incorporated into Weaving shed in during keep the tension force in the weft yarn relatively low.

According to a preferred embodiment, determine to be arranged in opening constantly of the second yarn retainer between weft accumulator and the storage latitude element so that determined with reference to constantly with weaving cycle in setting constantly relevant.Select the setting in the weaving cycle constantly to allow to control opening constantly of the second yarn retainer, so that determined with reference to constantly setting constantly relevant with this.Reference in the weaving cycle can be determined according to the moment in the weaving cycle that is arranged in the Weaving shed opposite side of moment in the weaving cycle that storage latitude element and the first yarn retainer between Weaving shed open and/or weft yarn expection arrival constantly.The following result of the method according to this invention tool: the impact of opening the moment in the weaving cycle that also is subject to the Weaving shed opposite side of weft yarn expection arrival of the second yarn retainer.

According to an embodiment, a kind of method is provided, wherein discharge one section weft yarn from weft accumulator, so that with described weft yarn be incorporated into Weaving shed in, wherein the weft yarn from weft accumulator is fed to storage latitude element via the entrance that stores up the latitude element, wherein the outlet via storage latitude element removes weft yarn from storage latitude element, so that with described weft yarn be incorporated into Weaving shed in, wherein begin weft yarn is incorporated into Weaving shed in before, weft yarn for example is stored in the latitude element with the zigzag formula, wherein begin weft yarn is incorporated into Weaving shed when middle, simultaneously storing weft threads is removed from storage latitude element in the neutralization of storage latitude element, wherein when weft yarn is incorporated into Weaving shed middle end, from weft accumulator with weft yarn with extended state via storage latitude element be incorporated into Weaving shed, wherein weft yarn to the introducing in Weaving shed begin by be arranged in the storage latitude element and Weaving shed between the first yarn retainer open control, wherein weft yarn finishes to control by the closure that is arranged in the second yarn retainer between weft accumulator and the storage latitude element to the introducing in Weaving shed, wherein the storage of weft yarn in storage latitude element begin by be arranged in weft accumulator with store up the second yarn retainer between the latitude element open control, wherein determine the reference moment in the weaving cycle, with reference to constantly for weft yarn is incorporated into Weaving shed in during be stored in measuring of moment weft yarn in the latitude element becomes extended state from storing state the weaving cycle, and wherein control according to the moment of reference in the determined weaving cycle and be arranged in weft accumulator and store up opening of the second yarn retainer between the latitude element.

According to an embodiment, weft yarn from weft accumulator is jetted in storage latitude element via the entrance of storage latitude element by the blowing device that is arranged between weft accumulator and the storage latitude element, wherein the moment in the weaving cycle of constantly determining according to the reference in the determined weaving cycle, start this blowing device.This allow to start this blowing device so that will be arranged in weft accumulator with store up the second yarn retainer between the latitude element open before the blowing device weft yarn of having jetted soon.This allows from the moment of opening the second yarn retainer weft yarn to be jetted to storage latitude element.This means that the opening of the second yarn retainer determined the moment in the weaving cycle of storing weft threads in storage latitude element.

According to preferred embodiment, the blowing device of stopping using of the inactive moment in weaving cycle is so that blowing device was reducing before constantly the winding-up of weft yarn.In other words, the weft yarn that is enabled in of blowing device finishes become extended state in storage latitude element before.This advantageously affects the moment in the weaving cycle that weft yarn in the storage latitude element becomes extended state.The shorter time before reaching extended state, only weft yarn is jetted in storage latitude element with low speed by the residue gas stream of blowing device.For this purpose, especially according to woven speed, determine beginning and the end of the winding-up of this blowing device in the weaving cycle.

According to an embodiment, according to being fed to storage latitude element from the setting section of the weft yarn of weft accumulator via the entrance of storage latitude element, determine the inactive moment in the weaving cycle.

In addition, select the winding-up power of this blowing device, so that when having removed the weft yarn of a part of storage from storage latitude element, weft yarn is not jetted to the outlet of storage latitude element.For this purpose, for example make the compressed-air actuated pressure that is transported to blowing device and be adapted to weft yarn type, weaving speed and/or other similar parameters via the compressed-air actuated flow velocity that blowing device is transported to storage latitude element.The air-flow power of blowing device must be enough to weft yarn is jetted in storage latitude element with desired speed, but must be restricted to so that avoiding weft yarn to tangle during storing up in the latitude element storing weft threads.

According to another embodiment, weft yarn to the introducing in Weaving shed begin by be arranged in storage latitude element with Weaving shed between the first yarn retainer open control, and/or the introducing of weft yarn in Weaving shed finishes to control by the closure that is arranged in weft accumulator and stores up the second yarn retainer between the latitude element.Term " first " in " the first yarn retainer " and " the second yarn retainer " and " second " only are intended to that there are two different yarn retainers in expression and in order to indicate in two yarn retainers of expression which.

According to a preferred embodiment, with reference to constantly determining based on the signal of the one or more Yarn detectors that are arranged in the weft accumulator place, more specifically be so-called doff detector, it carries signal when at every turn moving through Yarn detector from the doff of the cylinder of weft accumulator.In an embodiment, with reference to constantly based on the time difference between the signal of the Yarn detector that is arranged in the weft accumulator place, average time is poor and/or the statistic bias time difference is determined.

According to another embodiment, with reference to constantly alternatively or addedly based on determining from the one or more signals of sensor that exist that are arranged in storage latitude element place.

According to another embodiment, with reference to constantly alternatively or addedly based on the tension pick-up that is arranged in the weft yarn between weft accumulator and the storage latitude element and/or be arranged in store up the latitude element and Weaving shed between the signal of tension pick-up of weft yarn determine.

According to another embodiment, with reference to constantly alternatively or addedly determining based on the signal of the movable sensor of weft yarn, the movable sensor of weft yarn for example, the mobile ad-hoc that can detect the weft yarn that moves along movable sensor is speed.In a preferred embodiment, movable sensor be arranged between weft accumulator and the storage latitude element and/or storage latitude element and Weaving shed between.

This purpose is also realized by a kind of device, this device have weft accumulator, be used for the storage latitude element of weft yarn and be arranged in weft accumulator with storage latitude element between the yarn retainer, wherein control the yarn retainer by control module according to the moment of the reference in the determined weaving cycle.Storage latitude element can be stored in storage latitude element in the latitude element with the zigzag formula for allowing weft yarn, for example from the known storage latitude element of WO 2010/006774 A2.

The present invention also provides following advantage: be stored in than low-tension in the latitude element weft yarn can with than low-tension and/or be incorporated at a relatively high speed Weaving shed in.This especially allows to improve weaving speed or reduce and introduce the required compressed-air actuated consumption of weft yarn in air-jet loom.The compressed-air actuated amount that can carry by reducing compressed-air actuated pressure and/or minimizing reduces compressed-air actuated consumption.The compressed-air actuated amount of carrying is for example especially by determining by the flow of opening arrival Apparatus for spraying and jetting particulate materials and/or the time interval of winding-up.The present invention also provides following advantage: can be easily with the adhering change of the air-flow of weft yarn for weft yarn being fed to storage latitude element and the impact that weft yarn is incorporated in the shed open being taken into account.

By the in the accompanying drawings following description of the embodiment of expression, obtain other feature and advantage of the present invention.

Description of drawings

Fig. 1 shows the stereogram according to the part of loom of the present invention that has for a plurality of devices of supplying with weft yarn.

Fig. 2 showed before storing up storing weft threads in the latitude element according to the blowing device of device of the present invention and the cutaway view according to the arrow F2 among Fig. 1 of storage latitude element.

The state of the schematically illustrated storing weft threads of Fig. 3 before in the storage latitude element of Fig. 2.

Fig. 4 shows with the state during storing weft threads is in the storage latitude element of Fig. 2.

Fig. 5 shows when weft yarn further is stored in the storage latitude element of Fig. 2, begins to remove the state of weft yarn from the storage latitude element of Fig. 2.

Fig. 6 shows when the storage latitude element from Fig. 2 further removes weft yarn, the state before stretching constantly.

Fig. 7 shows when the storage latitude element from Fig. 2 further removes weft yarn, the state after stretching constantly.

Fig. 8 shows the state before the storage latitude element from Fig. 2 removes the weft yarn end.

Fig. 9 shows the state when the storage latitude element from Fig. 2 removes the weft yarn end.

Figure 10 schematically shows the view according to the arrow F10 among Fig. 1 of the cylinder of weft accumulator.

Figure 11 shows the continuous signal of the Yarn detector that is arranged in weft accumulator.

Figure 12 shows the modification of Fig. 2.

Figure 13 shows the curve of the signal of the tension pick-up of measuring weft tension.

Figure 14 shows the view according to the arrow 14 among Fig. 1 of another storage latitude element.

Figure 15 shows the curve of the signal of measuring the movable sensor that weft yarn moves.

The specific embodiment

Loom shown in Figure 1 comprises for four devices 1 supplying with weft yarn 2.Such device 1 is known from WO 2010/006774 A2, and it describes a part that forms present patent application.Each device 1 comprises weft accumulator 3, is wound up on the weft accumulator 3 from the weft yarn 2 of bobbin 4.Each device 1 also comprises main Apparatus for spraying and jetting particulate materials 5, and main Apparatus for spraying and jetting particulate materials 5 next-door neighbours Weaving shed 6 locate and are arranged as weft yarn 2 winding-ups in Weaving shed 6.Weaving shed 6 are formed by warp thread 7 and 8.Each device 1 also comprises Yarn Brake 9, blowing device 10 and storage latitude element 11, and they are arranged as from weft accumulator 3 and via Yarn Brake 9, blowing device 10 and storage latitude element 11 weft yarn 2 are directed to main Apparatus for spraying and jetting particulate materials 5 continuously.Show a plurality of pilot jets 12, it can enter into Weaving shed 6 and be arranged as supporting and be introduced in Weaving shed 6 weft yarn 2.In a preferred embodiment, main Apparatus for spraying and jetting particulate materials 5 and pilot jet 12 are installed on the slay 13 of loom, so that slay 13 moves around.Near Weaving shed 6, be positioned with latitude and cut 14.The end with main Apparatus for spraying and jetting particulate materials 5 relative positionings Weaving shed 6 is positioned with Yarn detector 15, and Yarn detector 15 is arranged as to detect and passes Weaving shed 6 weft yarns 2 of introducing.Blowing device 10 comprises winding-up unit 16 and yarn-guide tube 17, and yarn-guide tube 17 is also referred to as fills pipe and be connected to storage latitude element 11.Main Apparatus for spraying and jetting particulate materials 5 comprises winding-up unit 18 and is positioned near Weaving shed 6 yarn-guide tubes 19.Main Apparatus for spraying and jetting particulate materials 5 and blowing device 10 are for example implemented as described in the EP985.062 B1.

According to variant embodiment, Yarn Brake 9 is arranged on the weft accumulator 3 or is combined in the weft accumulator 3 and/or as yarn compensating device or yarn damper.According to variant embodiment, for example as known from EP 1.389.244 B1 or EP 1.389.245 B1, also arrange on each main Apparatus for spraying and jetting particulate materials 5 or in each main Apparatus for spraying and jetting particulate materials 5 also in conjunction with extra Yarn Brake or yarn folder.According to variant embodiment, each main Apparatus for spraying and jetting particulate materials 5 is also replaced by a plurality of main Apparatus for spraying and jetting particulate materials, two main Apparatus for spraying and jetting particulate materials for example arranging with the series winding that the weft yarn 2 that is associated cooperates.

Be provided with yarn retainer 20 at each weft accumulator 3 place, it for example forms by being arranged as the bar 21 that is activated by actuator 22.In this manual, yarn retainer 20 is also referred to as the second yarn retainer.In one embodiment, actuator 22 is made of electromagnet, and bar 21 is made of the pin that can cooperate with electromagnet.Weft accumulator 3 comprises cylinder 23 for example and weft yarn 2 is wound on not shown coiling arm on the cylinder 23.In the embodiment in figure 1, yarn retainer 20 is fixed on the weft accumulator 3.Bar 21 is arranged as the cylinder 23 that makes weft accumulator 3 and moves around.When bar 21 moves to the position (being also referred to as closing position) of close cylinder 23, bar 21 can prevent that weft yarn 2 from discharging from weft accumulator 3, and when bar 21 moves to bar 21 away from the position (being also referred to as open position) of cylinder 23, weft yarn 2 can be discharged from weft accumulator 3.In this case, yarn retainer 20 is arranged as when yarn retainer 20 is in the close position weft yarn 2 is remained on definite place.Each weft accumulator 3 also comprises at least one Yarn detector 24, and Yarn detector 24 generates signal when the weft yarn 2 that at every turn discharges from cylinder 23 moves through this Yarn detector 24.

As Fig. 2 and illustrated in fig. 3, yarn-guide tube 17 that can be by blowing device 10 via entrance 25 with weft yarn 2 winding-ups in storage latitude element 11, and according to moving direction B jet to storage latitude element 11 with outlets 26 entrance 25 relative positionings.Yarn retainer 27 is arranged in outlet 26 at storage latitude element 11.In this manual, yarn retainer 27 is also referred to as the first yarn retainer.Yarn retainer 27 is arranged as weft yarn 2 is clamped in outlet 26 places, more specifically for weft yarn 2 is remained on definite place.As an alternative or as a supplement, yarn retainer 27 is arranged as at outlet 26 places basically airtightly sealing storage latitude element 11 and/or mobile weft yarn 2 is braked.In an embodiment, yarn retainer 27 is made of the bar 28 and the retainer 30 that are subjected to actuator 29 orders, and bar 28 can collide retainer 30.In an embodiment, actuator 29 is made of electromagnet, and bar 28 is made of the pin that can cooperate with electromagnet.In this case, by weft yarn 2 is clamped between bar 28 and the retainer 30, and can keep weft yarns 2 by yarn retainer 37.During clamping, yarn retainer 27 is in the close position.If yarn retainer 27 is clipped weft yarn 2 not, more specifically when bar 28 removed from retainer 30, yarn retainer 27 was shown in an open position.

Such as shown in Figure 1 schematically, loom comprises control module 31, control module 31 is arranged as the actuator 22 that drives yarn retainer 20 via driver element 32, drives the actuator 29 of yarn retainer 27 and drives latitude via driver element 34 via driver element 33 and cut 14.In a preferred embodiment, control module 31 also provides compressed air via the winding-up unit 16 of 35 pairs of blowing devices 10 of controllable valve system, and controllable valve system 35 is connected to compressed air source 47.In addition, control module 31 preferably provides compressed air via the blowing device 18 of 36 pairs of main Apparatus for spraying and jetting particulate materials 5 of controllable valve system, and provides compressed air via 37 pairs of pilot jets 12 of controllable valve system.Control module 31 is arranged as the signal that receives Yarn detector 15 and/or receive the Yarn detector 24 of weft accumulator 3.

In the embodiment of Fig. 2 and Fig. 3, the storage latitude element 11 that is used for weft yarn 2 comprises in entrance 25 and the chamber 38 that exports between 26, and this chamber 38 is defined by

sidewall

39,40 and had a basically smooth shape.In this case, the transverse width between the

sidewall

39,40 in chamber 38 26 reduces to outlet from entrance 25, so that

sidewall

39,40 forms smaller angle each other, and the large angle between 1 ° to 8 ° of value for example.38 sidewall 41 places in the chamber for example are provided with some openings 42 at the upper side wall place, it allows compressed air 38 effusions from the chamber.Storage latitude element 11 also comprises the thread-carrier 43 that is arranged as above yarn retainer 27, this means to be arranged between yarn retainer 27 and the main Apparatus for spraying and jetting particulate materials 5.

From carrying compressed air such as compression air-sources 47 such as air tanks schematically illustrated among Fig. 1 to blowing device 10, this compressed air source 47 is connected to blowing device 10 via valve system 35.In a preferred embodiment, set and regulate pressure and/or the air velocity of compressed air delivery to blowing device 10, so that with desired speed weft yarn 2 is fed to storage latitude element 11.The power of blowing device 10 winding-ups must be so that be fed to storage latitude element 2 with enough speed with weft yarn 2.Also can be for example during weaving according to measured or set weave parameter, adjust pressure/or flow velocity.

From carrying compressed air such as compression air-sources 48 such as air tanks schematically illustrated among Fig. 1 to main Apparatus for spraying and jetting particulate materials 5 and/or pilot jet 12, this compressed air source 48 is connected to main Apparatus for spraying and jetting particulate materials 5 and/or pilot jet 12 via valve system 36 or 37.In a preferred embodiment, set and regulate with pressure and/or the flow velocity of compressed air delivery to main Apparatus for spraying and jetting particulate materials 5 and/or pilot jet 12, so that with desired speed weft yarn 2 is incorporated in Weaving shed 6.The power of main Apparatus for spraying and jetting particulate materials 5 and pilot jet 12 winding-ups must be so that be incorporated into weft yarn in Weaving shed 6 with enough speed.In a further embodiment, also can be for example during weaving according to measured or set weave parameter, for example with from WO 2006/114187 or the known mode of EP1272699 B1, adjust pressure/or flow velocity.

Yarn retainer 20, yarn retainer 27, blowing device 10, main Apparatus for spraying and jetting particulate materials 5 and pilot jet 12 the method according to this invention are via control module 31 controls.Use Fig. 3 to Fig. 9 to further specify the operation that use device 1 according to the present invention is supplied with weft yarn 2.

In Fig. 3,

yarn retainer

20 and 27 is closed, and main Apparatus for spraying and jetting particulate materials 5, blowing device 10 and pilot jet 12 are not jetted simultaneously.In Fig. 4, yarn retainer 20 is opened, and blowing device 10 winding-ups, thereby the weft yarn 2 that will discharge from the cylinder 23 of weft accumulator 3 is fed to storage latitude element 11, and is stored in the latitude element 11 according to the zigzag formula with a plurality of coils 49.In Fig. 5, yarn retainer 27 is also opened, and main Apparatus for spraying and jetting particulate materials 5 and a plurality of pilot jet 12 with weft yarn 2 winding-ups in Weaving shed 6.In Fig. 5, simultaneously remove weft yarn 2 via outlet 26 from storage latitude element 11, and via entrance 25 with weft yarn 2 winding-ups and be stored in the latitude element 11.

Next, blowing device 10 stops winding-up, so that weft yarn 2 only is fed to storage latitude element 11 by residual air stream, further removes stored weft yarn 2 from storage latitude element 11 simultaneously.Owing to removing the speed of weft yarn 2 from storage latitude element 11 greater than the speed that weft yarn 2 is fed to storage latitude element 11, thus particular moment weft yarn 2 will in storage latitude element 11, stretch.By stopping winding-up before being stored in the latitude element 11 fully at weft yarn 2, also easily realize when further being incorporated into weft yarn 2 in Weaving shed 6, making weft yarn 2 in storage latitude element 11, to stretch.The moment that weft yarn 2 stretches in storage latitude element 11 is called the moment that stretches.

Under Fig. 1 and state shown in Figure 7, the weft yarn 2 that stretches between weft accumulator 3 and main Apparatus for spraying and jetting particulate materials 5 further is fed to storage latitude element 11 via entrance 25 according to the moving direction B of weft yarn 2, removes weft yarn 2 via the outlet 26 with entrance 25 relative positionings from storage latitude element 11 simultaneously.Under state shown in Figure 8, the yarn retainer 20 of weft accumulator 3 is closed, so that prevent that by yarn retainer 20 weft yarn 2 from further discharging from weft accumulator 3, so that weft yarn 2 will finish to the introducing in Weaving shed 6.Under state shown in Figure 9, weft yarn 2 be incorporated in Weaving shed 6 and yarn retainer 27 also again closed.Simultaneously, main Apparatus for spraying and jetting particulate materials 5 and pilot jet 12 also stop winding-up, and weft yarn 2 is cut 14 by latitude and cut off.Weft yarn 2 can be before the moment of closed yarn retainer 27 soon, simultaneously or cut off soon afterwards.For example when being beaten up by 13 pairs of weft yarns 2 of slay, closed yarn retainer 27.Can repeat subsequently the circulation of Fig. 3 to Fig. 9 mentioned above.

According to variant embodiment, yarn retainer 27 also can be closed with less power soon before state shown in Figure 8, so that weft yarn 2 slowed down before state shown in Figure 8 soon, obviously, if between weft accumulator 3 and storage latitude element 11, Yarn Brake 9 is set as shown in Figure 1, then can control this Yarn Brake 9, for example when the introducing of weft yarn 2 in to Weaving shed 6 finishes, the mode that in other words with Yarn Brake 9 weft yarn 2 is slowed down.If Yarn Brake is arranged near the main Apparatus for spraying and jetting particulate materials 5, then this Yarn Brake can similarly make weft yarn 2 slow down before the state of Fig. 8 soon.Before the introducing of weft yarn 2 in to Weaving shed 6 finishes, soon, weft yarn 2 is slowed down or braking is favourable, limit the tension force in the weft yarn 2 when contacting with the bar 21 of yarn retainer 20 with this weft yarn 2 of box lunch.

In the embodiment shown, during weaving cycle, the valve system 36 of main Apparatus for spraying and jetting particulate materials 5 and the valve system 37 of pilot jet 12 are also controlled in known manner.In this case, opening of the first yarn retainer 27 is also controlled in known manner, and this yarn retainer 27 is determined weft yarn 2 is incorporated into beginning in Weaving shed 6.If for example the length of weft yarn 2 by on the cylinder 23 that is stored in weft accumulator 3 and four doff 50 that discharge from cylinder 23 consist of, the closure of yarn retainer 20 can occur in known manner so, for example after penultimate doff 50, can make yarn retainer 20 come closing position, in this case, the 3rd doff 50 passed through Yarn detector 24.According to illustrated embodiment, the second yarn retainer 20 and Yarn detector 24 are arranged so that weft yarn 2 is only just passing through Yarn detector 24 at every turn when cylinder 23 almost completely discharges doff.After weft yarn 2 is incorporated in Weaving shed 6 and before the weft yarn 2 of back is stored in the latitude element 11, the closure of the first yarn retainer 27 must occur.Weave if utilize two devices 1 according to the present invention to carry out, then always have time enough to can be used for closed yarn retainer 27, and for example occur closed in the moment that the weft yarn 2 that will introduce beats up with respect to fabric 51.Before closed yarn retainer 27 cutting off of weft yarn 2 occurs soon for example.

According to a preferred embodiment of the invention, control the valve system 35 of winding-up unit 18 and opening of control yarn retainer 20 with the follow-up signal of Yarn detector 24.Based on the moment (being also referred to as doff constantly) of the follow-up signal of Yarn detector 24, can determine when weft yarn 2 becomes extended state from storing state in storage latitude element 1, when more specifically stretch occurs constantly.If the storage cost of weft yarn 2 in storage latitude element 11 is than weft yarn 2 is incorporated into the time longer in Weaving shed 6, compare during being incorporated into weft yarn 2 in Weaving shed 6 so with under the state that passes storage latitude element 11 at weft yarn 2 with extended state, during weft yarn 2 is stored in the latitude element 11, elapsed time poor (being also referred to as the doff time) will be larger between two continuous signals of Yarn detector 24.In this embodiment, will be between the signal of opening and generating through Yarn detector 24 by first doff of yarn retainer 20 the poor doff time that is called first doff of elapsed time.The doff time of three follow-up doff is determined by elapsed time between four corresponding follow-up signals of Yarn detector 24 is poor.If the weft yarn 2 that for example is used for once introducing is formed by four doff 50 and the moment that stretches appears at during the 3rd doff, the doff time of first three doff general is significantly greater than doff time of the 4th doff so.Constantly appear at during second doff if stretch, so the doff time of first doff and second doff will be significantly greater than doff time of the 3rd doff and the 4th doff.Constantly appear at during the 4th doff if stretch, so the doff time of the 4th doff will be significantly less than doff time of previous doff.

Use doff constantly and/or the doff time, can determine that stretching constantly appears in weaving cycle which constantly.By the follow-up doff moment and/or doff time are compared, can determine as stretching the reference of measuring constantly constantly.For example can determine as described below with reference to constantly.Constantly appear at during the 3rd doff if for example determining stretches, from the doff time of second doff, the 3rd doff and the 4th doff, can further determine the 3rd reference during the doff constantly so.For this purpose, the user can example such as rule of three determine to stretch constantly whether appear near the 3rd doff begin, middle or moment of finishing.This means if the doff time of the 3rd doff only is different from the doff time of second doff slightly, then mean the 3rd doff major storage in storage latitude element 11, stretching appears at the moment that finishes near the 3rd doff constantly.If the doff time of the 3rd doff only is different from the doff time of the 4th doff slightly, mean then that the 3rd doff mainly stretches to pass storage latitude element 11, stretching appears near the 3rd moment that doff begins constantly.If the doff time of the 3rd doff is the mean value of the doff time of second doff and the 4th doff, then stretching appears near the middle moment of the 3rd doff constantly.Relatively doff time and/or doff allow constantly to determine that the conduct in the weaving cycle stretches the reference of measuring constantly constantly.

According to embodiments of the invention, according to determined with reference to constantly in the weaving cycle, control and be positioned at weft accumulator 3 and store up opening of the second yarn retainer 20 between the latitude element 11.In this embodiment, the moment of opening the second yarn retainer 20 is selected or is set as so that with reference to constantly with during the weaving cycle expecting that the moment is consistent, for example in the situation that the weft yarn 2 that is used for once introducing is formed by four doff 50, near the moment in the middle of the 3rd doff.This means opening of the second yarn retainer 20 during the weaving cycle to be controlled to be in weaving cycle early or moment in evening so that as stretch constantly measure determined with reference to constantly transfer in the weaving cycle expectation constantly.Approximate second doff time if determine in the example shown the 3rd doff time, so in an embodiment, yarn retainer 20 more late ground in weaving cycle is progressively opened, until the 3rd doff time is the mean value of second doff time and the 4th doff time.Approximate the 4th doff time if determine in the example shown the 3rd doff time, so in an embodiment, yarn retainer 20 is progressively opened in weaving cycle earlier, until the 3rd doff time is the mean value of second doff time and the 4th doff time.

In this case, also can with determined with reference to constantly with weaving cycle in expectation or set constantly compare, and can in weaving cycle, early or more lately open yarn retainer 20, until determined with reference to constantly consistent with expectation or the setting moment in the weaving cycle.The beginning of the storage of weft yarn 2 in storage latitude element 11 is controlled in this permission by opening yarn retainer 20, so that constantly appear at expectation or the setting moment in the weaving cycle take the reference moment as the stretching of measuring.

According to the present invention, not necessarily constantly determine with reference to constantly based on doff time and/or doff.In other embodiments, with reference to constantly alternatively or addedly based on the average doff time, based on the statistic bias of doff time, constantly and/or based on doff statistic bias constantly determine in a similar manner based on average doff.

In addition, according to embodiments of the invention, the definite moment with reference to constantly determining according in the weaving cycle in weaving cycle starts blowing device 10.The moment that starts blowing device 10 is determined in the mode similar to yarn retainer 20 moment of opening in the weaving cycle, and for example be affected so that start blowing device 10, with in weaving cycle in the winding-up of opening slightly earlier than yarn retainer 20, for example early several milliseconds.This allows when yarn retainer 20 is opened blowing device 10 weft yarn 2 of having jetted.

According to a preferred embodiment of the invention, the blowing device 10 of stopping using of the inactive moment in weaving cycle, wherein stopping using is set as constantly so that before the weft yarn 2 in storage latitude element 11 became extended state, the winding-up of 10 pairs of weft yarns 2 of blowing device reduced.At the embodiment that is consisted of by four doff for the weft yarn 2 of once introducing, if constantly appear at during the 3rd doff with reference to constantly and therefore stretching, blowing device 10 is stopped using after the signal of second doff so that also reduce winding-up after second doff so in an embodiment.The method also provides following advantage: mainly only store two doff in storage latitude element 11, so that for example can determine with reference to constantly based on the 3rd doff time and the 4th time difference of doff between the time.By the blowing device 10 of stopping using in advance, avoided before stretching constantly soon the coil of weft yarn 2 in storage latitude element 11 winding-up to going up each other.By the blowing device 10 of stopping using in advance, also guaranteed at the 3rd doff through occurring before the Yarn detector 24 stretching constantly, in other words remove the 4th doff 50 from cylinder 23 before.

Certainly, according to the other known method that uses control example such as Yarn Brake 9 of device 1 permission according to the present invention.Because in described example, directly remove the 4th doff from weft accumulator 3, will with the loom that storage latitude element 11 is not set in similarly mode the introducing of the 4th doff occurs.Thus, can start in known manner Yarn Brake 9 through the special time after the Yarn detector 24 at the penultimate doff.Device 1 signal that also allows based on Yarn detector 24, the signal that for example is used for first doff and second doff, come to control pilot jet 12 from the known mode of WO 2007/057217 A1, although during being incorporated into this weft yarn 2 in Weaving shed 6 the signal of uncertain Yarn detector 24 for first doff and second doff.Yet the same weft yarn 2 of these signal indications will be introduced in the speed in Weaving shed 6 because these signals after will be incorporated into the weft yarn 2 in Weaving shed 6 same section measure.

In another embodiment, according to Yarn detector 15 detected signals when weft yarn 2 arrives Weaving shed 6 opposite side in weaving cycle, control in known manner the compressed-air actuated pressure and/or the flow velocity that are transported to main Apparatus for spraying and jetting particulate materials 5.In a similar manner, in another embodiment, control compressed-air actuated pressure and/or the flow velocity that is transported to blowing device 10 according to the signal of Yarn detector 15, also change along with the change of the compressed-air actuated pressure that is transported to main Apparatus for spraying and jetting particulate materials 5 and/or flow velocity so that be transported to compressed-air actuated pressure and/or the flow velocity of blowing device 10.The compressed-air actuated pressure and/or the flow velocity that are transported to blowing device 10 also can change, so that for example during weaving cycle, for keeping constant from weft accumulator 3 from the time that cylinder 23 removes the first two doff 50.And during weaving cycle, can control in known manner opening of yarn retainer 27, for example with as in the air-jet loom without storage latitude element 11, open the mode of the yarn retainer 20 of weft accumulator 3.

In described embodiment, the weft yarn 2 that wherein is used for once introducing is formed by four doff 50 and occurs stretching constantly during the 3rd doff, this means during the penultimate doff, obtain following advantage: weft yarn 2 can be incorporated in Weaving shed 6 with secured fashion, such mode more specifically: can brake in a known way weft yarn 2 introducing between tailend, but weft yarn 2 can be incorporated into Weaving shed 6 with low-tension at full speed during major part and from introducing beginning still.

In Figure 10, show the mutual alignment of yarn retainer 20 and Yarn detector 24, wherein utilize arrow R to indicate the direction that during weaving cycle, removes weft yarn 2 from weft accumulator 3.Herein, yarn retainer 20 and Yarn detector 24 are located so that mutually Yarn detector 24 carries first signal when having removed first doff from weft accumulator 3, when having removed second doff from weft accumulator 3, carry secondary signal, when having removed the 3rd doff from weft accumulator 3, carry the 3rd signal and when having removed the 4th doff from weft accumulator 3, carry the 4th signal.Before stoping weft yarn 2 by yarn retainer 20, carry soon the 4th signal.

According to embodiment as shown in figure 10, except Yarn detector 24, also be provided with the second Yarn detector 52, the second Yarn detectors 52 at each weft accumulator 3 place for example with respect to circumference and Yarn detector 24 positioned opposite of cylinder 23.This allows to obtain two signals during the doff 50 that removes weft accumulator 3, in other words, and signal of Yarn detector 24 and a signal of the second Yarn detector 52.Example the weft yarn 2 that is used for once introducing is made of four doff generates eight signals during weaving cycle, occur signal when removing half doff subsequently at every turn.In this case, according to the present invention, the startup of yarn retainer 20 can be controlled to be so that stretch constantly or for example appear at after " 3.25 " doff as constantly reference of the measuring moment of stretching, in other words, after the 3rd signal of Yarn detector 24 soon and be before the 4th signal of Yarn detector 52 soon.

According to another embodiment, along the some Yarn detectors of the circumference of cylinder 23, so that each Yarn detector can detect the process of doff, for example with four Yarn detectors of 90 ° of displacements, more particularly Yarn detector 24 and 52 and in Figure 10 two other Yarn detectors 53 shown in broken lines and 54.In this case, can determine with reference to constantly based on the time difference between Yarn detector 24,53,52 and 54 the follow-up signal.For this purpose, can determine subsequently time difference 58 between the signal of time difference 57 between the signal of time difference 55, Yarn detector 53 between the signal of Yarn detector 24 and 53 and the time difference 56 between 52 the signal, Yarn detector 52 and 54 and Yarn detector 54 and 24.Such time difference 55,56,57,58 lists in Figure 11, wherein lists Yarn detector 24,53,52 and 54 the signal of telecommunication according to time scale.With reference to the moment that constantly can be defined as in the time difference 55,56,57,58 subsequently, occurring in the weaving cycle before the significantly reduced moment soon, as with shown in the moment 59 among Figure 11.With determine that based on the mode described above of the signal of a Yarn detector 24 only this allows to determine with reference to the moment with relatively high precision according to the present invention with reference to constantly comparing.

According to a modification, only determine with reference to the first value constantly based on the signal of Yarn detector 24 as mentioned above, and only determine with reference to the second value, the 3rd value and the 4th value constantly based on the signal of Yarn detector 52, Yarn detector 53 and Yarn detector 54 respectively.Subsequently, in one embodiment, statistics ground will be according to the mean value with reference to constantly for example being defined as with reference to the first value, the second value, the 3rd value or the 4th value constantly of the present invention.According to a not shown modification, for example also along the circumference setting example of cylinder 23 as mutually with three Yarn detectors of 120 ° of displacements.

As shown in figure 12, in one embodiment, be provided with at storage latitude element 11 places and have sensor 44, for example optical pickocff is used for observing storing, and this means to fill weft yarn 2 and/or remove weft yarn 2 from storage latitude element 11 in storage latitude element 11.If in storage latitude element 11, have the weft yarn 2 that stretches, so in one embodiment, exist sensor 44 to generate low signals, and if in storage latitude element 11, have the weft yarn 2 that stores with the zigzag formula, exist so sensor 44 to generate high signal.Other embodiment also is feasible.In one embodiment, be arranged in storage latitude element 11 places with the some

sensors

45 and 46 that exist that exist sensor 44 similarly to design, in order to observe in storage latitude element 11 whether have the weft yarn that is in extended state.

According to embodiment shown in Figure 12, a plurality of

sensors

44,45 and 46 that exist are arranged along the distribution of lengths ground of storage latitude element 11, in order to determine according to of the present invention with reference to constantly.If for example weft yarn 2 is stored in such existence in

sensor

44,45 or 46 the zone with the zigzag formula, then exist sensor to generate high signal, if and weft yarn 2 with extended state through

such sensor

44,45 or 46 that exists, then exist sensor to generate low signal.This means before being stored in weft yarn 2 in the latitude element 11, exist

sensor

44,45 and 46 respectively to carry low signal.If during weaving cycle, exist in the

sensor

44,45 or 46 at least one to generate high signal and again carry low signal in particular moment, then this shows at this and has the sensor place, the weft yarn 2 that stores with the zigzag formula has become

stretching.Exist sensor

44,45 and 46 can for example be arranged so that usually during weaving cycle, to exist

sensor

44 and 45 to generate high signal, and exist sensor 46 never to generate high signal.So will exist the signal of sensor 46 as validation signal.

In an example, as get off to determine according to of the present invention with reference to constantly.If for weft yarn 2, only existing sensor 45 to generate high signal during special time, during the time period of 3msec, is low signal afterwards for example, so can be with reference to the signal that constantly is defined as existing the sensor 45 again special time after moment of step-down, for example 2msec.If for weft yarn 2, have sensor 45 and exist sensor 44 all generate high signal and and then generate low signal, the signal that can be defined as existing sensor 44 with reference to signal so is the special time after moment of step-down again, for example 2msec.According to a possibility, also can the moment of step-down be taken into account again with the signal that has sensor 45.Store weft yarn 2 in storage latitude element 11 during, the signal that has a sensor 45 is with the special time before the signal that has sensor 44 again step-down, for example 2msec.In this case, if exist the signal of sensor 45 to be about to again step-down, 2msec for example, then for example with reference to the signal that constantly is defined as existing sensor 44 again after moment of step-down soon.This allows to determine according to of the present invention with reference to constantly with larger certainty.And having got rid of the signal intensity that has sensor that is for example caused by the weft yarn that stores improperly with the zigzag formula is interpreted as improperly weft yarn and is stretched.If exist sensor 44,45 and 46 generate high signals and and then generate low signal, so can be with reference to the moment of the special time after the signal step-down that constantly is defined as existing sensor 46, if the signal that has sensor 45 and 44 step-down again in succession soon before that.

According to an embodiment, control yarn retainer 20 constantly according to determined reference subsequently.For this purpose, yarn retainer 20 for example may be controlled to so that during being stored in weft yarn 2 in the latitude element 11, exist sensor 44 and 45 during weaving cycle, to generate high signal, and existing sensor 46 never to generate high signal, the signal that wherein can constantly be defined as stretching existing sensor 45 and 44 to generate becomes the moment of low signal one by one from high signal in the short period.This embodiment allows according to the present invention to determine relatively accurately the reference moment, and this allows according to this with reference to constantly controlling opening of yarn retainer 20.If this reference for example too early occurs in weaving cycle constantly on average, this means does not almost have weft yarn 2 to be stored in the latitude element 11 with the zigzag formula, the next one that is used for weft yarn 2 is introduced, and in one embodiment, yarn retainer 20 is opened in weaving cycle earlier.If constantly on average for example too late generation in weaving cycle of this reference, this means that a lot of weft yarns 2 are to be stored in the latitude element 11 in a zigzag, the next one that is used for weft yarn 2 is introduced, and in one embodiment, yarn retainer 20 is opened in weaving cycle more behindhand.

Utilization exists

sensor

44,45 or 46 references of determining constantly certainly can also be used for controlling the valve system 35 of blowing device 10, and control the valve system 36 of main Apparatus for spraying and jetting particulate materials 5 or the valve system 37 of pilot jet 12.

According to another embodiment as shown in figure 12, be furnished with the tension pick-up 60 for weft yarn 2 at thread-carrier 43 places, and be furnished with the tension pick-up 61 for weft yarn 2 at blowing device 10 places.Each tension pick-

up

60,61 signals of measuring of carrying as the tension force in the weft yarn 2.In the Figure 13 with

curve

62 and 63, the example of tension pick-

up

60,61 the signal of telecommunication is shown as the function at loom angle during introducing weft yarn 2.As shown in the figure, the signal of tension pick-up 60 is in constantly 68 increases, and the signal of tension pick-up 61 also increases in the identical moment.Such tension force increase be since weft yarn 2 in the stretching constantly that stretches, and the moment of this increases determined according to the reference of the present invention moment.

According to another embodiment as shown in figure 14, be furnished with the movable sensor 64 for weft yarn 2 at thread-carrier 43 places, and be furnished with the movable sensor 64 for weft yarn 2 at blowing device 10 places.Each

movable sensor

64,65 is carried as the moving process of weft yarn 2 and/or the signal of measuring of translational speed.In the Figure 15 with curve 66 and curve 67, during introducing weft yarn 2, the example of

movable sensor

64,65 the signal of telecommunication is shown as respectively the function at loom angle.As shown in the figure, the signal of movable sensor 64 is in constantly 69 increases, and the signal of movable sensor 65 reduced in the identical moment.The change of such speed of weft yarn 2 be since weft yarn 2 in the stretching constantly that stretches, and the moment of this changes determined according to the reference of the present invention moment.

According to an embodiment, the example that is formed by four doff 50 at the weft yarn 2 that is used for once introducing, in the end during doff, the moment that stretches is when for example being chosen in the 4th doff, this allows to weave at a high speed, but has the less risk that controllably occurs of deceleration possibility of weft yarn 2.For this setting of loom, with at least one tension pick-

up

60,61 and/or at least one

movable sensor

64,65 determine that with reference to constantly being engraved in the weaving cycle when allowing to stretch be suitable especially as far as possible lately.In this case, can determine exactly with reference to constantly, more particularly, even appear at weft yarn 2 when stretching constantly and be incorporated in the situation when finishing in Weaving shed 6, also can easily determine the stretching moment.

Known continuous weft 2 from identical bobbin 4 may the vicissitudinous air-flow adhesiveness of tools, and may change lentamente according to the diameter of bobbin 4 from the necessary power of bobbin 4 pulling weft yarns.As a result, in being stored in latitude element 11 during, can store from the uniform pressure of the use winding-up unit 16 of identical bobbin 4 with different speed and set and/or the weft yarn of air velocity supply.In addition, therefore in being incorporated into shed open 6 during, can move with different speed from the weft yarn that uniform pressure is set and/or air velocity is introduced of the use nozzle unit 18 of identical bobbin 4.In device 1 according to the present invention, in a preferred embodiment, weft yarn 2 accelerates when beginning to be incorporated in the shed open 6, and then the speed with approximately constant further is incorporated in Weaving shed 6, and slows down or braking when finishing in being incorporated into shed open 6.According to of the present invention with reference to determining and weaving according to the weft yarn 2 of the air-flow adhesiveness change of the continuous weft 2 that is specially adapted to introduce for reference of the opening use constantly of control yarn retainer 20 of the present invention constantly.This special advantage of the present invention will illustrate in greater detail hereinafter.

During weaving, the driver element 33 of yarn retainer 27 is for example opened in the particular moment of weaving cycle, and in a preferred embodiment, this moment was set according to the moment that forms Weaving shed 6.In a preferred embodiment, for example, as known from EP 0.239.137 B1, the valve system 36 of main Apparatus for spraying and jetting particulate materials 5 is set as so that the expectation of weft yarn 2 in weaving cycle arrives Yarn detector 15 constantly.In a preferred embodiment, the valve system 37 that is used for pilot jet 12 is set as weft yarn 2 by the air stream supporting from pilot jet 12, for example, and as known from EP 2.163.670 A1 or WO 2007/057.217 A1.

If the air-flow adhesiveness from the continuous weft 2 of specific bobbin 4 increases during weaving from this bobbin 4, then with the setting that is equal to of the valve system 35 of blowing device 10, weft yarn 2 will be stored in the latitude element 11 quickly.If yarn retainer 27 is opened in the identical moment in weaving cycle, then at this constantly, the major part of weft yarn 2 will be stored in the latitude element 11, so that before weft yarn 2 stretchings in storage latitude element 11, the major part of weft yarn 2 also is incorporated into Weaving shed 6 from storage latitude element 11 with larger speed so that then only the less remainder of weft yarn 2 directly to introduce from weft accumulator 3 than low velocity.Because this effect, so that when weaving with the adhering weft yarn 2 of larger air, this means with identical winding-up power, weft yarn is mobile quickly, because weft yarn 2 is stored in the latitude element 11 in major part, so the speed that this weft yarn 2 transmits by Weaving shed 6 raises extraly.This means with the stretching that is used for slower weft yarn 2 and constantly compare, being engraved in weaving cycle when being used for the stretching of quick weft yarn 2 will occur more behindhand.If determine as stretching the reference of measuring constantly constantly according to the present invention, and in the situation that being engraved in the weaving cycle when stretching, reality occurs more behindhand, when next introducing weft yarn 2, can control the moment of opening yarn retainer 20 constantly according to this reference of determining, if and so that with control be implemented as with reference to the time be engraved in the weaving cycle more behindhand and occur, it is slower that the moment of then opening yarn retainer 20 is controlled to be in weaving cycle.Owing to when next introducing weft yarn 2, opening more behindhand yarn retainer 20, so less weft yarn 2 will be stored in the latitude element 11, so that the less weft yarn 2 that before had been stored in the latitude element 11 is incorporated in Weaving shed 6, and more weft yarn 2 will directly and therefore be introduced more slowly from weft accumulator 3.Utilize the present invention, during being incorporated into quick weft yarn 2 in Weaving shed 6, this weft yarn 2 is slowed down, thereby resist the effect of quick weft yarn 2.

If the air-flow adhesiveness from the continuous weft 2 of specific bobbin 4 reduces during weaving from this bobbin 4, then with the setting that is equal to of the valve system 35 of blowing device 10, weft yarn 2 will more slowly be stored in the latitude element 11.If the identical moment in weaving cycle is opened yarn retainer 27, then this moment only the smaller portions of weft yarn 2 will be stored in the latitude element 11, so that before weft yarn 2 stretchings in storage latitude element 11, the smaller portions of weft yarn 2 are incorporated into Weaving shed 6 from storage latitude element 11 with larger speed, so that then the larger remainder of weft yarn 2 is directly introduced from weft accumulator 3 with lower speed.Because this effect, so that when with than the adhering weft weaving of little airflow the time, this means with identical winding-up power, weft yarn is more slowly mobile, because for once introducing, only the smaller portions of weft yarn before were stored in the latitude element 11, so the speed that this weft yarn transmits by Weaving shed 6 reduces extraly.This means with the stretching of very fast weft yarn 2 and constantly compare, the stretching of slower weft yarn 2 will more early occur in weaving cycle constantly.If determine as stretching the reference of measuring constantly constantly according to the present invention, and in the situation that being engraved in the weaving cycle when stretching, reality earlier occurs, then when next introducing weft yarn 2, can control the moment of opening yarn retainer 20 constantly according to this reference of determining, if and so that with control be implemented as with reference to the time be engraved in the weaving cycle earlier and occur, the moment of then opening yarn retainer 20 is controlled to be in weaving cycle early.Because yarn retainer 20 is opened earlier when next introducing weft yarn 2, so more weft yarn 2 will be stored in the latitude element 11, so that for once introducing, the more weft yarn 2 that before had been stored in the latitude element 11 is incorporated in Weaving shed 6, and less weft yarn 2 will directly and more slowly be introduced from weft accumulator 3.Utilize the present invention, during being incorporated into slow weft thread 2 in Weaving shed 6, can afterwards this weft yarn 2 be slowed down, thus the effect of antagonism slow weft thread 2.

By reference of the measuring moment according to the stretching of the weft yarn 2 in the conduct in the weaving cycle storage latitude element 11, control the moment of opening yarn retainer 20, can resist fast or the effect of slow weft thread, quick weft yarn 2 be slowed down more and slow weft thread 2 is less slowed down.The present invention also allows further to use the valve system 36 of use in the device 1 that storage latitude element 11 is not set therein and 37 whole adjustings and setting.In one embodiment, starter gate valve system 35 is so that blowing device 10 is greatly about the moment winding-up of opening line Apparatus for spraying and jetting particulate materials 20, for example before being about to open yarn retainer 20, so that when discharging weft yarns 2 by yarn retainer 20, blowing device 10 weft yarn 2 of having jetted.Certainly, also can control in known manner the valve system 35 of main Apparatus for spraying and jetting particulate materials 5, so that Yarn detector 15 is passed through in the expectation of weft yarn 2 in weaving cycle constantly.

According to the present invention, valve system 35 that can also regulation blowing device 10 is so that with reference to constantly occuring or with remove specific doff 50 from weft accumulator 3 relevant.In a preferred embodiment, the present invention so that with reference to the time be engraved in and remove the setting that occurs during the penultimate doff and carry out.According to another possibility, the present invention uses constantly with the reference during removing last doff, and this allows to weave quickly, but means the more risk of braking weft yarn 2.

According to an embodiment, blowing device 10 is with specified time interval winding-up weft yarn 2.According to another embodiment, blowing device 10 winding-up weft yarns 2 are until the setting moment in the weaving cycle.According to a preferred embodiment of the invention, the inactive moment in the weaving cycle blowing device 10 of stopping using, the inactive moment is defined as the moment that is fed to storage latitude element 11 from the specific part of the weft yarn 2 of weft accumulator 3 via the entrance 25 of storage latitude element 11, for example removes two special times after the doff 50 from weft accumulator 3.In the illustrated embodiment, for example according to the secondary signal of Yarn detector 24 and/or according to existing sensor 45 to generate the moment of high signal, determine to stop using constantly.This means for quick weft yarn 2, wherein for example removing two doff 50 special time afterwards earlier occurs constantly than the setting-up time in the weaving cycle or setting in weaving cycle, wherein the normal winding-up of blowing device 10 be until should set constantly, and blowing device 10 is stopping to jet than the setup times in the weaving cycle or moment of setting in the constantly more Zao weaving cycle.Thus, the blowing device 10 quick weft yarn 2 of during the shorter time interval, jetting so that the amount of the weft yarn 2 that stores in storage latitude element 11 is limited, and so that fast the speed that is incorporated in Weaving shed 6 of weft yarn 2 also be limited.Therefore, according to of the present invention stretch constantly or with reference to constantly than blowing device 10 according to earlier occuring in the situation of setting winding-up.For slow weft thread 2, blowing device 10 is for example according to setting winding-up, so that weft yarn as much as possible 2 is stored in the latitude element 11, and slow weft thread 2 still can be with enough speed generations to the introducing in Weaving shed 6.Therefore, in weaving cycle, brake earlier quick weft yarn 2, and in weaving cycle, brake more behindhand slow weft thread 2.Introduce with slow weft thread 2 for fear of quick weft yarn 2 too soon and to introduce too slowly, according to the present invention, from the moment that the weft yarn 2 of length-specific is stored in the latitude element 11, do not restart blowing device 10.This embodiment is particularly conducive to the impact of the random fast weft yarn of antagonism or slow weft thread.

Although first doff time and/or doff are constantly, be incorporated into impact in Weaving shed 6 constantly can not being subject to weft yarn 2 with reference to the doff time that is stored in the doff in the latitude element 11 before constantly and/or doff more specifically, the air-flow adhesiveness of weft yarn 2 but these doff times and/or doff represent to be correlated with constantly.Therefore, can suppose that then weft yarn 2 will be incorporated in Weaving shed 6 relatively rapidly if first doff time is shorter, and if first doff time longer, then weft yarn 2 will be incorporated in Weaving shed 6 relatively slowly.This also allows to utilize first doff time that device 1 according to the present invention determines and/or doff also to can be used for method according to WO 2007/057.217 A1 constantly.

Although the weft yarn 2 that is used in the illustrated embodiment once introducing is formed by four doff 50, the weft yarn 2 that is used for once introducing can certainly be formed by other a plurality of doff 50, for example five or more doff 50.In this case, can suitably adjust described method, for example so that keep a doff and second doff in this specification, and replace respectively the 3rd doff and the 4th doff in this specification by penultimate doff and last doff.Other modification also is possible.

Obviously, the opening control constantly and nonessentially occur continuously of yarn retainer 20, but can occur with gap is for example with the gap of 2msec.If for example in weaving cycle determined with reference to the time be engraved between the weft yarn on average and change less than 2msec ground, so in one embodiment, do not regulate the moment of opening yarn retainer 20.Change if the determined reference moment for example surpasses 2msec ground, open constantly with the gap adjustment of 2msec so in one embodiment, more specifically shift to an earlier date or delay.

By the present invention, realized the enough early generations in weaving cycle of opening of yarn retainer 20, so that the weft yarn 2 of sufficient length is stored in the latitude element 11, this length allows at a relatively high speed and than small tension receiving coil weft yarn 2 to be incorporated in Weaving shed 6.By the present invention, realized that also opening in weaving cycle of yarn retainer 20 enough occurs behindhand, so that during being incorporated into weft yarn 2 in Weaving shed 6, the weft yarn 2 that stores in storage latitude element 11 is stretched, and so that during the decline of weft yarn 2 was incorporated in Weaving shed 6, weft yarn 2 was directly removed and is braked in this mode from weft accumulator 3.

The present invention also provides following advantage, when utilizing some devices 1 according to the present invention to weave, according to a pattern weft yarn 2 is supplied in Weaving shed 6, and during introducing weft yarn 2 from another device 1, weft yarn 2 can be stored in the latitude element 11.This means in one embodiment, weft yarn 2 in storage latitude element 11 be stored in some weaving cycles during occur, and weft yarn 2 occurs during single weaving cycle from only removing of storage latitude element 11.

According to not shown embodiment, the yarn retainer 27 shown in the accompanying drawing is replaced by such yarn retainer, and this yarn retainer is arranged near the main Apparatus for spraying and jetting particulate materials 5 and is arranged as order weft yarn 2 releases when beginning to introduce weft yarn 2.

When utilizing some weft weavings according to a pattern, if and some weft yarns are weaved parameter with other and are weaved, for example, as known from WO 01/79597 A1, each weft yarn can also be with the method according to this invention and from the known Combination of Methods of WO 01/79597 A1.The method according to this invention can certainly with as from the known Combination of Methods of WO 2006/114187 A1, more particularly in one embodiment, with reference to constantly being defined as a plurality of references mean values constantly, wherein for example determine based on the change frequency of opening constantly execution with respect to yarn retainer 20 for the quantity of determining the average reference reference moment constantly.

Certainly, also can weft yarn 2 be stored in the latitude element 11, and weave with known typical way utilization device 1 according to the present invention, wherein weft yarn 2 always directly removes from weft accumulator 3.In this case, do not use the method according to this invention yet.

Although in the diagram loom, use four only to use in other embodiments one according to device of the present invention according to device of the present invention, perhaps use other quantity according to device of the present invention.If weft yarn 2 is unsuitable for being stored in the latitude element, then blowing device 10 can use with main Apparatus for spraying and jetting particulate materials 5, in order to remove weft yarn 2 and weft yarn 2 is incorporated into Weaving shed 6 from weft accumulator 3.

Illustrated embodiment only is used for illustrating the present invention.Can make modification, particularly about the embodiment of blowing device, storage latitude element, yarn retainer and sensor.The combination that belongs to the illustrated embodiment of claim scope also is possible.

Claims

1. method that is used for supplying with at loom weft yarn (2), wherein discharge one section weft yarn (2) in order to described weft yarn (2) is incorporated into Weaving shed (6) from weft accumulator (3), wherein will be fed to described storage latitude element (11) via the entrance (25) that stores up latitude element (11) from the weft yarn (2) of described weft accumulator (3), wherein the outlet (26) via described storage latitude element (11) removes weft yarn (2) from described storage latitude element (11), in order to described weft yarn (2) is incorporated in described Weaving shed (6), wherein before beginning to be incorporated into weft yarn (2) in described Weaving shed (6), weft yarn (2) is stored in the described storage latitude element (11), wherein at least during weft yarn (2) is incorporated into the part of the period in described Weaving shed (6), carry out simultaneously the storage of weft yarn (2) and remove, it is characterized in that, at least in weft yarn (2), store and remove when finishing, with will be fed to described storage latitude element (11) from the weft yarn (2) of described weft accumulator (3) and compare, the weft yarn (2) that will be stored in quickly in the described storage latitude element (11) removes from described storage latitude element (11), so that during the period that weft yarn (2) is incorporated in described Weaving shed (6), stretching in weaving cycle constantly, the weft yarn (2) that is stored in the described storage latitude element (11) becomes extended state from storing state, wherein determines to stretch the reference of measuring constantly constantly as described.

2. method according to claim 1, it is characterized in that, weft yarn (2) stores in described storage latitude element (11) begin by be arranged in the second yarn retainer (20) between described weft accumulator (3) and the described storage latitude element (11) open control, wherein according to the described reference in the weaving cycle constantly, control opening of described second yarn retainer (20).

3. method according to claim 2, it is characterized in that, to be arranged in opening of described the second yarn retainer (20) between described weft accumulator (3) and the described storage latitude element (11) and constantly be defined as so that determined with reference to constantly with weaving cycle in setting constantly relevant.

4. according to claim 1,2 or 3 described methods, it is characterized in that, utilization is arranged in the blowing device (10) between described weft accumulator (3) and the described storage latitude element (11), to arrive in the storage latitude element (11) via entrance (25) winding-up of storage latitude element (11) from the weft yarn (2) of described weft accumulator (3), wherein the moment of constantly determining according to the reference in the weaving cycle in weaving cycle, start this blowing device (10).

5. method according to claim 4 is characterized in that, in the inactive moment in weaving cycle, the described blowing device (10) of stopping using is so that described blowing device (10) is to winding-up minimizing before described reference constantly of weft yarn (2).

6. method according to claim 5 is characterized in that, determines described inactive according to being fed to from the setting section of the weft yarn (2) of described weft accumulator (3) storage latitude element (11).

7. each described method in 6 according to claim 1, it is characterized in that, weft yarn (2) to the introducing in described Weaving shed (6) begin by be arranged in the first yarn retainer (27) between described storage latitude element (11) and described Weaving shed (6) open control, and/or weft yarn (2) finishes to control by the closure that is arranged in the second yarn retainer (20) between described weft accumulator (3) and the described storage latitude element (11) to the introducing in described Weaving shed (6).

8. each described method in 7 according to claim 1 is characterized in that, based on the signal that is arranged at least one Yarn detector (24,52,53,54) that described weft accumulator (3) locates, determines described with reference to constantly.

9. method according to claim 8, it is characterized in that, described Yarn detector (24,52,53,54) move through described Yarn detector (24,52 at the each doff (50) from the cylinder (23) of described weft accumulator (3), 53,54) carry signal the time.

10. each described method in 7 according to claim 1 is characterized in that, based on having the signal of sensor (44,45,46) from least one that is arranged in that described storage latitude element (11) locates, determines described with reference to constantly.

11. each described method in 7 is characterized in that according to claim 1, determines described with reference to the moment based on the signal of the tension pick-up (60,61) that is used for weft yarn (2).

12. each described method in 7 according to claim 1, it is characterized in that, based on the movable sensor (64 that is used for weft yarn (2), 65) signal is determined described with reference to constantly, for example can detect along described movable sensor (64,65) movable sensor (64,65) that is used for weft yarn (2) of the movement of mobile weft yarn (2).

13. an employing is the device of each described method in 12 according to claim 1, it is characterized in that, described device (1) comprise weft accumulator (3), be used for the storage latitude element (11) of weft yarn (2) and be arranged in described weft accumulator (3) with described storage latitude element (11) between yarn retainer (20), wherein said yarn retainer (20) is controlled according to the reference moment definite in weaving cycle by control module (31).

14. device according to claim 13 is characterized in that, described storage latitude element (11) is the storage latitude element (11) that stores weft yarn (2) with the zigzag formula.