EP0685585B1 - Apparatus and method to remedy irregularities by the insertion of a weft thread in a weaving rotor of a multiphase loom - Google Patents

Description

The invention relates to a device and a Procedure for correcting irregularities in the Entry of a weft into a weaving rotor Row shed weaving machine, especially for removing Weft breaks and incomplete shed registered or damaged weft threads, according to the Preamble of claim 1. Further relates to Invention on a series shed loom with the device according to the invention.

It is known for the weft insertion in a Row shed weaving machine a metering device for the To use weft. So is from EP 0 445 489 A1 (T.817) a metering device for dispensing weft thread known to a row shed weaving machine, in which one Dosing roll the weft from an upstream Withdraws the thread supply and feeds it to a weaving machine, the metering roll being wrapped several times by weft thread is to cause enough stiction, so that the withdrawal speed or Conveying speed of the weft through the Rotation speed of the metering roller is determined.

This known metering device is also able to automatically thread the weft thread when it is re-equipped with a supply spool and inevitably bring the new weft thread into a starting position that is advantageous for weaving.
The known metering device has the disadvantage that in the event of an irregularity in the insertion of the weft thread, for example in the event of a thread breakage or if the weft thread is not completely inserted into the shed, the weaving process must be interrupted and the weft thread must be removed from the thread paths or the shed manually. The troubleshooting requires manual intervention by the operating personnel and causes longer downtimes of the weaving machine.

The invention has for its object a device and a method for the supply of weft to create the weaving rotor of a series shed weaving machine that avoid the disadvantages mentioned, which in particular allow an interruption of the weaving process an irregularity in the weft insertion automatically remedy.

According to the invention, this object is achieved with a Device according to the characteristic features of Claim 1. Relate to dependent claims 2 to 16 refer to further advantageous embodiments of the Invention. The task is further solved by the Device according to the invention with a method according to characterizing features of claims 17 to 20 is operated. Dependent claims 21 and 22 relate to other advantageous forms of procedure the invention.

The advantages of the invention can be seen in the fact that the availability of a weaving machine increases when certain Types of interruptions in the weaving process, for example through a bobbin change, a weft break or one not completely entered in the shed Weft threads arise and are automatically removed. A An advantage of the invention is that the Metering device a thread store for the weft thread is upstream, or that the metering device also serves as thread store, the stored thread length of at least one weaving width corresponds, so that one between the metering roller and weft breakage or a Weft end of a bobbin (empty bobbin) Weft thread still completely in the shed can be entered before the weaving process is interrupted got to. Another advantage is that the Metering device against the entry direction of the Weft thread can be actuated, which makes it possible for one not yet fully entered in the shed Weft, or a weft that is not yet cut on the weft entry side, automatically withdraw through the metering device and dispose.

Fig. 1a

Eine schematische Anordnung einer erfindungsgemässen Zumessvorrichtung mit eingeschossenem Schussfaden und umwickelter Förderrolle;

Fig. 1b

eine Draufsicht auf die mit Schussfaden umwickelte Förderrolle in einer Vorrichtung nach Fig. la;

Fig. 1c

ein Schnitt durch eine Förderrolle gemäss der Anordnung nach Fig. 1b;

Fig. 1d

eine schematische Anordnung einer weiteren Ausführungsform einer erfindungsgemässen Vorrichtung;

Fig. 2a

eine schematische Anordnung einer Trenn- und Ablenkvorrichtung;

Fig. 2b-2e

ein Ausführungsbeispiel einer Trenn- und Ablenkvorrichtung;

Fig. 2f-2l

eine Darstellung verschiedener Verfahrensschritte zum Betrieb der Trenn-und Ablenkvorrichtung;

Fig. 3a

eine Draufsicht einer Fadenbremse in einer Vorrichtung nach Fig. 1a;

Fig. 3b

eine Seitenansicht einer Fadenbremse nach Fig. 3a;

Fig. 4

eine schematische Ansicht eines Schussfadeneintrages in eine Reihenfachwebmaschine;

Fig. 5a-5c

Verfahren zur Behebung von Unregelmässigkeiten;

Fig. 6a-6d

Verfahren zur Behebung von Unregelmässigkeiten.

The invention is described below using exemplary embodiments. Show it:

Fig. 1a

A schematic arrangement of a metering device according to the invention with a weft thread and a wrapped roller;

Fig. 1b

a plan view of the conveyor roll wrapped with weft thread in a device according to Fig. La;

Fig. 1c

a section through a conveyor roller according to the arrangement of Fig. 1b;

Fig. 1d

a schematic arrangement of a further embodiment of a device according to the invention;

Fig. 2a

a schematic arrangement of a separating and deflecting device;

Figures 2b-2e

an embodiment of a separating and deflecting device;

Fig. 2f-2l

an illustration of various method steps for operating the separation and deflection device;

Fig. 3a

a plan view of a thread brake in a device according to Fig. 1a;

Fig. 3b

a side view of a thread brake according to Fig. 3a;

Fig. 4

is a schematic view of a weft thread entry in a row shed weaving machine;

5a-5c

Irregularity repair procedures;

6a-6d

Procedures for correcting irregularities.

In Figure la is a device 1 for eliminating Irregularities when entering a weft in a weaving rotor of a row shed weaving machine is shown. The device serves in particular as one Metering device 1 or one Weft troubleshooting device 1 around a weft 7 deduct from a supply unit 2 and this to be matched to the weaving cycle of the weaving machine. The supply unit 2 pulls the weft thread 7 from one not shown coil, and passes this over a Eyelet 24b of a suction nozzle 25 charged with a fluid to. The storage unit 2 has one or more Weft feeders 20a that mark the beginning of the Keep the weft 7a, 7b of other bobbins ready. Of the ready-made weft thread 7a runs through the eyelet 24a and is in the weft holder tube 22a via a swing arm 21a pivotally held. If the need arises Feed weft 7a of the weaving machine, so the Swivel arm 21a in the position shown in dashed lines pivoted and the weft holder tube 22a with a Feeded fluid from the injection nozzle 23a, so that the Weft 7a is detected by the suction nozzle 25 and by the subsequent units of the metering device 1 is entered. Can do exactly the same with others Weft feeders 20a such as the swing arm 21b with weft holder tube 22b and shooting nozzle 23b further weft 7b are kept ready. The Intake nozzle 25 conveys the weft 7 through a open thread brake 3 through to a Weft conveyor 4 with a shooting nozzle 41. Im The present exemplary embodiment is the weft brake 3 formed from two pivotable baffles 31a touch each other in the closed state 31b and a clamping and braking effect on the Use weft 7. If a thread tip becomes a Weft thread 7 from the suction nozzle 25 through the thread brake 3 conveyed in the direction of the injection nozzle 41, see above can be in an open position Guide surfaces 31a the trajectory of the weft thread 7 Also influence the shooting nozzle 41.

The following weft conveying device 4 has the task of conveying the weft 7 in the weft insertion direction 7e and also opposite to this insertion direction. The weft nozzle 41 and a catch nozzle 42 opposite in the weft insertion direction 7e define a weft axis 8, along which a weft thread 7 is inserted into the weft thread conveying device 4. A deflection device 43 with a drive device 43a, lever arm 43b and eyelet 43c is arranged directly in front of the catching nozzle 42. When a new weft thread tip of a weft thread 7 is shot in, the eyelet 43c lies in the insertion axis 8, so that the weft thread 7 is carried by the eyelet 43c and then penetrates into the catching nozzle 42 and further into the conveying channel 42a.
The weft thread conveying device 4 has a conveying roller 40 between the insertion nozzle 41 and the catching nozzle 42, which has a support surface in the circumferential direction on which the weft thread 7 comes to rest. In the conveyor operation, the contact surface is wrapped several times by the weft thread 7. In the present exemplary embodiment, the support surface is formed by support elements 48 that are regularly spaced apart from one another in the direction of rotation. The ends of the support elements 48 open into an edge element 402, which has one or more spaced-apart catch lugs 49 on its outer circumference, which form a catch region 44. The conveyor roller 40 is rotatable both in a direction of rotation 45a in order to feed a weft thread 7 to a weft processing unit 6 and in a direction of rotation 45b in order to withdraw a weft thread 7 from the weft processing unit 6. The individual turns of the weft thread 7 usually lie next to one another on the support surface of the conveyor roller 40, so that the length of the stored weft thread supply can be determined and monitored by an optical sensor 46 by measuring the winding width of the stored weft thread 7. The weft thread conveying device 4 is followed in the weft insertion direction 7e by a separating and deflecting device 5, which consists of a weft thread cutting device 51 and a deflecting device 52. The deflection device 52 can be moved back and forth in the direction of movement 52a with the aid of a drive device, so that either a conveying channel 53a comes to lie in the insertion axis 8 in order to guide a weft thread 7 to be inserted into the subsequent weft processing unit 6, or an angled conveying channel 53b comes in the insertion axis 8 in order to feed a weft 7 conveyed in the weft insertion direction 7e to a waste container 55. The separating and deflecting device 5 is followed in the direction of the shooting axis 8 by a shot processing unit 6, of which a transport nozzle 60 and a delivery channel 61 are shown. The conveyor channel 61 opens into a weft distributing device 9, which feeds the weft 7 to an open shed of a row shed loom (FIG. 4). The insertion axis 8 advantageously extends from the suction nozzle 25 to the transport nozzle 60.

Figure 1b shows a plan view of the conveyor roller 40 of the Weft conveyor 4. The insertion axis 8 points to the axis of rotation 47 of the conveyor roller 40 Inclination angle alpha and points to the contact surface of the Conveyor roller 40 a minimum distance. Of the The minimum distance to the contact surface for the weft thread 7 is designed so that the fluid jet of the injection nozzle 41 only insignificantly by those forming the contact surface Elements 48 is distracted. The process for one automatic winding of the conveyor roller 40 with weft thread 7 is described on the arrangement of Fig. 1b. A Weft 7 is taken from the weft nozzle 41 along the Shooting axis 8 through the eyelet 43c Deflection device 43 and then in the opening of the Catch nozzle 42 worn and continues through the Delivery channel 42a. Usually lies during that Shoot the angled delivery channel 53b in the Weft axis 8 so that the weft thread is inserted 7 reaches the waste container 55. After that Shooting in the weft conveyor 4 remains the catch nozzle 42 continues to be acted upon by a fluid and causes a weft on the weft 7 Weft insertion direction 7e acting force. The lever arm of the Deflection device 43 is from the bullet position 43e by moving in a pivoting direction 43f in a Brought winding position 43d. Here comes the Weft 7 in contact with the edge element 402, so that the weft 7, through which in the direction of rotation 45a rotating conveyor roller 40, reaches a catch area 44 and is held by a catch 49 so that the conveyor roller 40 continues to rotate increasingly weft 7 is wound on the support surface of the conveyor roller 40 and thus a wound weft thread 7d forms. As soon as the desired number of turns of the weft 7 is reached on the support surface of the conveyor roller 40 this stopped, and the deflection device 43 from the Winding position 43d in the weft position 43e brought. The weft thread 7 becomes the catch nose 49 removed and the conveyor roller 40 is thus ready to To promote weft 7. The contact surface of the Conveyor roller 40 is designed such that a Apply a large number of turns of the weft thread 7 to let. Thus, the conveyor roller 40 simultaneously exercises Function of a thread store, the on the Conveyor roller stored thread length at least one Weave width or the width of a weft entry corresponds to the following weaving machine.

1c shows a further top view of the Weft conveyor 4 with conveyor roller 40. Die injection nozzle held by load-bearing elements 400, 401 41 and catch nozzle 42 define the shooting axis 8. Das Center of rotation 47a of the axis of rotation 47 of the conveyor roller 40 has an angle alpha with respect to the shooting axis 8, that is less than 90 degrees. The size of the angle alpha depends on the design of the contact surface Conveyor roller 40 and the length or of the Number of turns of 40 on the conveyor roller storing weft 7 and the yarn thickness. The Contact surface of the conveyor roller 40 consists of a conical area 403 which, starting from the side of the Axis of rotation 47 towards edge element 402, over a width d tapered, and runs into an area 404 of Width c, which is approximately parallel to the center of rotation 47a runs. The widths c and d of the areas 403 and 404 and the angle of inclination beta between the areas 403 and 404 depends, among other things, on the one to be saved Length of the weft 7 and the nature of the Weft 7. The conveyor roller 40 conveys the weft 7 in the direction of rotation 45a or in the weft insertion direction 7e, the front part in the weft insertion direction 7e of the weft thread 7 continuously from the support surface the conveyor roller 40 is withdrawn and in 42 through the catch nozzle the separating and deflecting device 5 is forwarded. Here the aim is to ensure that the individual turns of the wound weft 7d without ever crossing lying next to each other in such a way that the Supply unit supplied weft 7 on the conical part 403 comes to rest, and the deducted Weft 7 in the cylindrical part 404, the edge element 402 facing, comes to rest. During the conveyor operation the individual turns of the Weft thread 7 thus on the support surface in the direction of Axis of rotation 47a against the edge element 402 before the Lifted again and the weft 7 through the Catch nozzle 42 is forwarded. In the direction of rotation is 45a a slip between the turns of the weft 7 and the contact surface of the conveyor roller 40 if possible avoid. The conveyor roller 40 thus also serves as Metering device for the weft 7, by on the ground the number of revolutions of the conveyor roller 40 the conveyed Length of the weft thread 7 can be determined. The outer surface the bearing surface should therefore be in the direction of rotation 45a, 45b a sufficiently large static friction on the stored Use weft 7 to slip in the direction of rotation avoid, at the same time, the static friction towards 47a of the axis of rotation must be relatively small so that the individual Turns of the weft thread 7 on the contact surface in Glide towards 47a. The individual turns of the Weft 7 are, especially in the conveyor operation in Direction of rotation 45a, close to each other, the im conical area 403 overlying turns one in Force acting in the direction 47a towards the edge element 402 cause so that the turns lying in the area 404 continuously pushed in the direction of the edge elements 402 become. In the area 404 the sliding friction is between Weft 7 and contact surface advantageously such to choose that the individual turns side by side stay put and not be pushed on top of each other.

The design of the shape as well as the Surface quality of the contact surface of the Conveyor roller 40 is of central importance, so that a Larger number of turns of the weft thread 7 saved can be such that during the conveyor operation of the Weft 7 can be removed again without hindrance, and such that the conveyor roller 40 also functions as a metering device serves to increase the length of the inserted weft thread 7 determine. These conditions can be met with a variety of Embodiments of the conveyor roller 40 can be achieved, wherein the embodiment to a large extent on the quality and depends on the properties of the weft thread 7 used. In the present exemplary embodiment, the contact surface the conveyor roller 40 regularly in the direction of rotation 45a spaced support elements 48 formed. This Embodiment effects on the weft thread 7 lying on it a little static and sliding friction for movements in Direction of the axis of rotation 47a and a sufficiently large Stiction in the direction of rotation 45a. It can however depending on the properties of the weft 7 prove to be advantageous, the contact surface of the Conveyor roller 40 as a continuous closed surface to execute or the lateral surface for example to provide breakthroughs in places. Behaviour of the weft thread 7 on the conveyor roller 40 can further by a suitable choice of the angles alpha and beta and by the widths c and d of the areas 403 and 404 influence.

The sequence of an automatic threading procedure as well as for the automatic correction of irregularities is explained in more detail using the arrangement according to FIG. 1a.

To thread a weft thread 7, it is initially placed in the suction nozzle 25, the thread brake 3 is opened, then the fluid nozzles 25, 41 and 42 are activated, and the weft thread 7 along the weft axis 8 via the thread brake 3 and the weft thread conveying device 4 into the separating and deflecting device 5 entered, wherein during the threading process the angled conveying channel 53b usually lies in the insertion axis 8, so that the weft thread tip and possibly further weft thread 7 get into the waste container 55. Then only the fluid nozzle 42 remains activated, the lever arm 43b of the deflection device 43 is brought into the winding position 43d, the conveyor roller 40 begins to rotate in the direction of rotation 45a, and the contact surface of the conveyor roller 40 is covered with the required number of turns. The weft thread 7 remains largely held by the catch nozzle 42, so that the weft thread 7 is supplied by the supply unit 2 during winding. As soon as the conveyor roller 40 is occupied with a predetermined number of turns, the deflection device 43 is brought into the weft position 43e, the weft thread 7 is cut by the weft thread cutting device 51 and the conveying channel 53a of the deflection device 52 is brought into the insertion axis 8. The conveyor roller 40 then begins to rotate in the direction of rotation 45a and the weft thread 7 is fed to the weaving machine via the weft preparation unit 6. The conveyor roller 40 determines the speed of the weft thread 7 in the weft insertion direction 7e and synchronizes the weft thread insertion into the weft preparation unit 6 with the weaving cycle of the weaving machine. The weft thread 7 is advantageously fed continuously to the weft processing unit 6.
If a weft thread interruption now occurs between a bobbin of the supply unit 2 and the weft thread conveying device 4, for example caused by a weft thread breakage or by the thread end of a bobbin, this is determined with the aid of a sensor 46. The sensor 46 detects that the width of the wound weft thread 7d falls below an adjustable minimum dimension. As soon as a weft thread interruption is determined, the conveyor roller 40 continues to deliver from the weft thread 7 stored on the conveyor roller 40 until a complete weft thread insertion has taken place over the entire weaving width of the weaving machine. Then the weft thread 7 is cut at the entry-side end of the weaving machine and the weaving machine is stopped. Since the width of the wound weft thread 7d decreased, the end of the weft thread 7 must lie on the conveyor roller 40. The weft thread 7 remaining in the weft preparation unit 6 is withdrawn from the conveyor roller 40, which now rotates in the direction of rotation 45b, until the weft thread tip lies behind the weft thread cutting device 51. The deflection device 52 is then reversed so that the conveying channel 53b comes to lie in the shooting axis 8. The conveyor roller 40 then rotates in the direction of rotation 45a, and the remaining weft thread 7 is conveyed into the waste container 55. The metering device is thus freed of thread remnants and is ready for a new, automatic threading process.

Once the sensor 46 detects the width of the on the feed roller 40 stored weft 7d adjustable minimum size can also fall below be followed. The weaving machine becomes Brought to a standstill such that the weft is not yet cut on the entry side. Thereupon will the conveyor roller 40 actuated in the direction of rotation 45b and the weft 7 located in the shed withdrawn and provisional on the conveyor roller 40 saved. Once the weft tip up to Weft thread cutting device 51 is withdrawn the deflection device 52 is reversed and that on the Conveyor roller 40 located weft 7 in the Waste container 55 disposed of. Thereupon the already described method a new weft 7 automatically threaded.

In contrast to that shown in Fig. 1a The embodiment shown in Fig. 1d Metering device a weft conveyor 4 and an upstream in the thread running direction 7e Weft thread store 4a. The storage device 4b is as Tube formed, one over the top tube opening arranged fluid nozzle 4c the weft 7 in the Immerses storage device 4b, and wherein a Sensor 46 detects the stored thread length. The one Weft thread store 4a following Weft conveyor 4 determines the conveying direction of the weft 7 by the weft of two counter-rotating conveyor rollers 40 is easily clamped, such that a slip between conveyor roller 40 and Weft 7 is avoided as far as possible, so that the Number of turns of a conveyor roller 40 the entered Length of the weft thread 7 can be determined. Otherwise apply to this embodiment, that already in Fig. 1a comments made. In the storage device 4b a thread length is advantageously stored one to two weaving widths of the following weaving machine corresponds. When retracting the weft 7 by the conveyor roller 40 is operated in the direction of rotation 45b it is advantageous between the conveyor roller 40 and the The injection device 41 located in the storage device 4b with a fluid to fill the weft 7 counter to the weft insertion direction 7e in the direction of Storage device 4b promotes.

1a or 1d, three sensors 46, 46a and 46b for monitoring the weft thread 7 are shown. However, the sensor 46 alone would suffice to operate the entire metering device 1.
As already described, when threading a weft thread 7, it is cut by the separating and deflecting device 5 and thus a weft thread tip is produced with a precisely defined position. If the conveyor roller 40 is provided with a sensor for detecting the angle of rotation, the location at which the weft thread tip is located can be determined exactly, based on the defined position during cutting, since the path lengths in a weft insertion device are known. The weft thread tip can therefore also be conveyed to precisely defined positions. If a weft break occurs, the weft 7 is cut in the weaving machine, for example, on the weft insertion side, which in turn produces a weft tip with a precisely defined position. The metering device 1 then withdraws the weft thread 7 from the weft processing unit 6, the retracted length of the weft thread 7 being detectable by the rotation of the conveying device 40, so that the weft thread tip can be positioned, for example, exactly in front of the separating and deflecting device 5.

The schematic shown in Fig. 2a Exemplary embodiment of a separating and deflecting device 5 has a feed channel 42a through which a weft thread 7, conveyed with a fluid flow, to the outlet opening 42b is moved. There are also two delivery channels 53a, 53b shown with inlet openings 53c, 53d through which the Weft 7 is further eligible. An entrance opening 53c, 53d, which are approximately opposite the outlet opening 42b is arranged to receive a weft thread 7 referred to as positioned inlet opening 57. The Exit opening 42b and the weft 7 receiving, positioned inlet opening 57 a distance 57a of the width S. That from the Outlet opening 42b forms fluid in the Gap 57a a free fluid flow 54a with a Main flow direction 54b. The outlet opening 42b of the Delivery channel 42a and one of the inlet openings 53c, 53d are relative to each other move that one out of the outlet opening 42b emerging weft thread 7 through the free fluid flow 54a influenced, in the pending, positioned Entry opening 57 arrives. A portion of the free Fluid flow 54a also passes through the Entry opening 53c, 53d into the delivery channel 53a, 53b and promotes the weft thread 7 through the respective conveying channel 53a, 53b. The width S of the distance 57a is at least designed such that the cutting parts 51b, 51c a cutting device 51 between the gap 57a can penetrate to a located in the gap 57a Cut weft 7. From a variety of Cutting devices 51, which in the inventive Separating and deflecting device 5 are used could be, is in the present embodiment scissor-like cutting device 51 with two themselves intersecting cutting surfaces 51b, 51c shown. Scissors-like cutting devices 51 have usually cutting surfaces that are easy on each other are set so that a punctiform Cutting point results. Such scissors have one relatively large cutting force, so that also different, difficult to cut or very thin Have weft threads 7 cut easily. Another The advantage of such scissors 51 is that the occurring pollution remains low since none overlying surfaces are present, and the dirt through the free fluid flow 54a can be removed. The The cutting device 51 is actuated via a Drive device 51a.

The supply conveyor channel 42a and the two delivery conveying channels 53a, 53b must be relative be movable relative to each other. In the present The two delivery channels 53a, 53b are exemplary embodiments by a displaceable in the direction of movement 52a Bracket 56 held together and by a Drive device 56a slidably. Most different Directions of movement 52a, for example circular, are possible around an inlet opening 53c, 53d into the position of a positioned inlet opening 57 to move.

The minimum distance of the gap 57a between the Outlet opening 42b and the positioned Entry opening 57 is by the dimension of cutting parts 51b, 51c of the cutting device 51 given. However, the gap width S can also be larger can be selected, with the gap width for example individually adjustable for each delivery channel 53a, 53b is by the delivery channels 53a, 53b, 42a in Movement direction 53e, 53f, 42c movable back and forth are, and thus different gap widths S1, S2 surrender. The amount of free fluid flow 54a that is in the positioned entry opening 57, and on flows through the adjoining delivery channel 53a, 53b depending on the distance S. By setting the distance S can thus be the relative amount of fluid in the following Delivery channel 53a, 53b or the loss of fluid in the gap S can be set. The fluid loss in the gap S can significantly contribute to the environment of the Keep inlet opening 53c, 53d clean by the Loss of fluid flows to the outside and contaminating parts promoted away.

The separating and deflecting device 5 is due to the Possibility of varying the gap width S for Different weft thread properties adjustable. For example, thin yarns have the property that the weft thread tip after exiting the Exit opening 42b lie in a larger area can, so that a safe threading into the to ensure positioned inlet opening 57, the Gap width S is set small.

The inlet and outlet openings 42b, 53c, 53d or the delivery channels 42a, 53a, 53b have different cross-sectional areas, so that air volume transferred or a safe one Threading the weft thread into the entry opening 57 also can be influenced via the cross-sectional area.

In the present embodiment there are only two outgoing conveyor channels 53a, 53b shown. The However, the device according to the invention is simple Expandable in such a way that one from each Many outgoing conveyor channels 53a, 53b in the position a positioned inlet opening 57 are brought can. It can therefore be used on a variety of delivery channels 53a, 53b can be reversed.

Figures 2b - 2e always show the same Side view of an embodiment of a separation and Deflection device in which the Weft thread cutting device 51 and the deflection device 52 from a common drive device 56a are driven.

2b shows a drive device 56a, which is rigidly connected to a holding device 58. The Holding device 58 has a rigidly connected cutting edge 51f with cutting surface 51b and an opening for one Delivery channel 42a and a bore 51d for a Swivel axis of the cutting device.

2c shows a movable holder 56 for the two Delivery channels 53c, 53d. The holder 56 also has a Connecting element 56b to the drive device 56a and a connecting element 56c to the cutting edge 51g Cutting surface 51c.

2d shows the movable cutting edge 51g with cutting surface 51c and a bore for receiving the pivot axis 51d the cutting edge 51g. Next is an articulated one Power transmission means 51e shown that the Connection 56c connected to the movable bracket 56 is.

Fig. 2e shows those in Figs. 2b - 2d individually components shown in their entirety Active connection. The cutting edge 51g is over the pivot axis 51d pivotable in the direction of movement 52b with the Holding device 58 connected. The cutting edge is 51g via the articulated force transmission means 51e connected to the bracket 56. The bracket 56 itself is in turn via the connecting element 56b with the Drive device 56a connected so that the bracket 56th by the drive device 56a in the direction of movement 52a can be moved back and forth. Lying in the position shown the conveyor channel 42a and the inlet opening 53c of the Conveying channel 53a facing each other. If the bracket 56 reversed by the drive device 56a over the Connection means 56b the distance to the holder 56 enlarged, the inlet opening 53d of the Conveying channel 53b ultimately the conveying channel 42a submitted. During the reversing process, the cutting edge 51g with cutting surface 51c pivoted simultaneously, so that the two cutting surfaces 51c and 51b are in between the weft thread 7 located on the cutting surfaces cut through.

FIGS. 2f to 2h show different phases of the cutting and reversing process from a side view. Figures 2i to 21 show the same phases from a top view.
In FIG. 2i, the conveying channels 42a and 53b lie in alignment in the shoot-in axis 8, the weft thread 7 being conveyed into the waste container 55. The side view in FIG. 2f shows the conveyor channel 42a and the opposite inlet opening 53d of the conveyor channel 53b. The cutting device 51 with cutting edges 51f and 51g is in the open state 59a. During the cutting and reversing process, as shown in FIG. 2g, the holder 56 and thus the two inlet openings 53c, 53d are moved in the direction of movement 52e towards the drive device 56a. Due to the mechanical coupling of the cutting device 51 with the holder 56, the cutting edge 51g simultaneously executes a closing pivot movement 52c, so that the two cutting edges 51f and 51g come into a closed state 59b, and a weft thread 7 located between the cutting surfaces is severed. The top view FIG. 2k again shows the cutting process, in particular the two cutting surfaces 51b, 51c, which cut through the weft thread 7. If the holder 56 is moved further in the direction of movement 52f towards the drive device 56a, as shown in FIGS. 2h and 21, the cutting and reversing process comes to an end in that the pivotable cutting edge 51g executes an opening movement in the direction of movement 52d, and in the conveying channel 42a comes to lie opposite the inlet opening 53c of the conveying channel 53a. The cutting and reversing process can of course also be carried out in the opposite direction, in that the holder 56 is moved away from the drive device 56a in the opposite direction to the movement direction 52e, 52f. The two cutting edges 51f, 51g in turn carry out a cutting movement, and at the end of the reversal process, the tear opening 53d comes to rest in front of the conveying channel 42a. The separating and deflecting device 5 also allows a weft thread 7, which is continuously conveyed in the weft insertion direction 7e, to be cut and reversed. A continuously supplied weft thread 7 is cut in FIG. 2k. Thereupon, as can be seen from FIG. 21, the reversing process is completed, with the newly formed weft thread tip being introduced into the conveying channel 53a.

The illustrated separating and deflecting device 5 has the Advantage that it can be cut and reversed, while the weft 7 is continuously conveyed. Further advantages can be seen in the fact that only one Drive device is necessary that the amount of fluid in the delivery channels 53a, 53b by varying the Gap width S can be influenced that in the gap any fluid loss occurring removes contaminating parts, that the scissor-like cutting device 51 cuts a wide variety of yarns safely, and that at a cutting movement takes place every reversing process.

3a shows a top view of the thread brake 3. The suction nozzle 25 and the shooting nozzle 41, which are held by supporting elements 400, 401, are arranged in a shooting axis 8. Flat brake elements 31a, 32a, 33a are arranged on both sides of the shooting-in axis 8 and can be moved in the pivoting direction 37 about the pivotable connecting element 34a, so that a weft thread 7, located between the brake elements 31a, 32a, 33a, of two opposite pairs of brake elements 31a, 32a , 33a is touched. The braking elements 31a, 32a, 33a exert a clamping and thus braking effect on the weft thread 7. 3b shows a side view of the braking device. The surfaces of the braking elements 31a, 32a, 33a can be arranged in any direction. In the opened state 31a, the surfaces of the brake elements 31a, 32a, 33a allow the fluid flow between the suction nozzle 25 and the weft nozzle 41 to be influenced in such a way that the weft thread 7 is inserted into the opening of the weft nozzle 41 without any problems. In the closed state 31a, two pairs of brake elements 31a, 32a, 33a act against each other, the area clamping the weft thread 7 forming a line, so that a clamped weft thread 7 can move along this line. The braking device 3 has a carriage 36 with grooves 35, pivotable connecting elements 34 engaging in the grooves 35 with cams 34b, so that when the carriage 36 moves in the direction of movement 36a, the braking elements can be moved via the pivotable connecting elements 34a and the pivotable connecting elements 34 connected to them are.
An advantage of the present embodiment of the thread brake 3 is that it influences and directs the direction of the fluid flow in the open state. Another advantage can be seen in the fact that the region clamping the weft thread 7 forms a line which runs approximately through the weft axis 8. Each pair of brake elements 31a, 32a, 33a forms a clamping area, so that several clamping areas can be arranged one behind the other in the weft insertion direction. A weft thread 7 drawn off a bobbin can behave very uneasily in the area of the supply unit 2 or the thread brake 3, for example due to the take-off speed. A line-shaped braking areas, and in particular a plurality of line-shaped braking areas arranged one behind the other in the weft insertion direction, are suitable for calming the thread travel of the weft thread 7. The thread brake 3 tightens the thread 7 on the supply unit 2 and thus ensures a uniform tension on the supply unit.

Fig. 4 shows the weft entry in a Row shed weaving machine 102. Four weft threads 71, 72, 73, 74 are made up of four storage units 2 and four Metering devices 1 in the weft distributing device 9 funded. The weft distributing device 9 distributes the delivered weft threads on the opened ones Shed compartments of the weaving rotor 100, the weft threads passing through stationary fluid nozzles 91, 92, 93, 94 in the rotating Web rotor 100 can be entered. On the weft entry side A sensor 46d monitors the end 100a of the weaving rotor 100 Shooting the weft 74 into the weaving rotor 100 Weft threads 71, 72 and 73 were in ascending order Sequence in time in the web rotor 100 shot and are therefore accordingly against the weft arrival end 100b of the weaving rotor 100 registered. Moves at the same time as the weft insertion the weaving rotor 100 in the direction of movement 101, so that the entering weft threads 7 at the same time Weft thread scissors 51 or towards the thread clamp 37 be moved. In the illustrated position of the weaving rotor 100, the weft 71 is completely in the weaving rotor 100 entered what is recognized by the sensor 46c, and the Weft 71 is on the weft insertion side of the Thread scissors 51 cut and from the thread clamp 37 held. The newly created thread tip becomes through the weft distributing device 9 to another deflected nozzle, not shown, and in the respect the shed into which the weft 74 is inserted, the following shed initiated. Sensors 46e be arranged along the shed to the by the Monitor shed flying weft 7.

The procedure for automatic removal of Irregularities when entering the weft into a Row shed weaving machine is shown in Figures 5a to 5c as well in Figures 6a to 6d by the expiring Steps of action described. To control the flow of Action steps, for controlling the actuators and for A microprocessor is used to record the sensor signals used that over RAM, ROM and one Input / output device has. The action steps are closer to the embodiment of FIG. 1a explained.

• Eine Unterbrechung der Zulieferung des Schussfadens 7 zwischen einer Vorratseinheit 2 und einer Fördervorrichtung 4 der Zumessvorrichtung 1. Eine Unterbrechung des Schussfadens 7 kann sich durch einen Schussfadenbruch ergeben, durch eine leere Spule, was einen Spulenwechsel erfordert, oder einen Garnwechsel.
• Ein nicht vollständiger Eintrag des Schussfadens 7 in ein Webfach des Webrotors
• Ein langes Verharren eines Schussfadens 7 in einem Webfach bei stillgesetztem Webrotor, wobei der Schussfaden 7 mit einem Fluid gestreckt wird, sodass insbesondere die Schussfadenspitze beschädigt wird, zum Beispiel in dem sie ausfranst.

An irregularity in the insertion of the weft thread that needs to be remedied is understood to mean the following occurrences:

• An interruption in the supply of the weft thread 7 between a supply unit 2 and a conveying device 4 of the metering device 1. An interruption of the weft thread 7 can result from a weft thread break, an empty bobbin, which requires a bobbin change, or a yarn change.
• An incomplete entry of the weft thread 7 in a shed of the weaving rotor
• A long stay of a weft thread 7 in a shed with the weaving rotor stopped, the weft thread 7 being stretched with a fluid, so that in particular the weft thread tip is damaged, for example by fraying it.

All the irregularities mentioned have the consequence that the weft 7 is not in the shed in accordance with regulations can be entered, which results in errors in the tissue, if the irregularity is not corrected in time.

5a shows a partial step of the process according to the invention Method that the on the conveyor 40th located or stored the weft Waste container 55 supplies. This substep becomes Example activated when the on the conveyor 40th stored thread length a predeterminable value falls short of what at a thread break or an end a bobbin occurs. In action step 110 the conveyor 40 rotated in the direction 45g and the Tip of the weft thread 7 behind the deflection device 52 withdrawn. In the following action step 111 the deflector 52 actuated so that the angled Delivery channel 53b comes to lie in the shooting axis. in the Action step 112 becomes part or all of itself on the conveyor roller 40 weft 7 the Waste container 55 supplied.

FIGS. 5b and 5c show a partial step for automatically inserting a weft thread 7 into the metering device 1 and for placing the weft thread into the weft preparation unit 6 and into the weft thread distribution device 9 of the row shed weaving machine. Usually there is no weft thread 7 in the metering device 1 before the start of this action step. In action step 113, the thread brake 3 is opened, in action step 114 the nozzles 25, 41 and 42 are actuated, and thus a weft thread 7 is entered along the insertion axis 8 if in the nozzle 25 is a weft 7. If a weft thread breaks between the nozzle 25 and the nozzle 41, this occurs that the weft thread tip is in the region of the nozzle 25. In action step 115, the deflection device 43 is pivoted into position 43d and the conveyor roller 40 rotates in the direction of rotation 45a. If a weft thread 7 is present in the weft thread conveying device 4, it is caught by a catch 49 and guided by the rotary movement of the conveying roller 40 onto the bearing surface of the conveying roller 40, so that with each revolution of the conveying roller 40 an additional turn of the weft thread 7 on the conveying roller 40 is saved. The deflection device 43 is then pivoted back into the basic position 43e.
Action step 117 checks whether a weft thread 7 is present on the conveyor roller 40. If there is no weft thread, action step 118 checks whether a new weft thread 7 can be put in place. If this is not possible, the system is shut down in action step 120 and auxiliary personnel are requested for manual troubleshooting. Otherwise, a new weft thread 7 is presented with action step 119 by pivoting a swivel arm 21a and is entered into metering device 1 starting with action step 113.
In action step 121, the thread brake 3 is closed, in step 122 the weft thread 7 is cut by the weft thread cutting device 51 and thus a new thread tip is generated, in step 123 the deflection device 52 is reversed so that the weft thread 7 can be conveyed into the subsequent weft preparation unit 6, in step 124 the conveyor roller 40 rotates in the direction of rotation 45a until in step 125 the tip of the weft thread 7 is placed in a defined position in the weft thread distribution device 9.

6a shows a method for starting a stationary row shed weaving machine. Action step 126 checks whether a specifiable thread length is stored on the conveyor roller 40. If this is not the case, action step 127 checks whether a weft thread 7 is present on the conveyor roller 40. If this is the case, the weft thread 7 located on the conveyor roller 40 is removed and a new weft thread 7 is applied to the conveyor roller 40. Action step 128 determines the length of time the machine has come to a standstill. A weft thread that remains in the shed of a row shed weaving machine for a long time, and in particular is kept constantly stretched with a fluid, can be damaged. In particular, the tip of the weft thread 7 can fray, so that the weft thread 7 can no longer be fully inserted. 5a, the weft 7 is withdrawn from the shed and temporarily stored on the conveyor roller 40. A portion of the stored weft thread 7 is then disposed of in the waste container 55. Thereupon, the weft thread is presented again by action step 129. This includes cutting the weft thread by the cutting device 51, which creates a new weft thread tip, reversing the deflection device 52 and placing the weft thread 7 in a defined position of the weft thread distribution device 9.
As soon as all the weft threads 7 have been placed, the weaving rotor of the series shed weaving machine is brought into rotation with the action step 130, and the individual metering devices 1 are operated one after the other, staggered in time and synchronized with the position of the weaving rotor, so that a weft thread entry takes place in the weaving shed of the weaving rotor. Points "7" and "8" in the flow chart according to FIG. 6a form a waiting loop which is exited as soon as a sensor detects an irregularity or the machine is stopped by the operating personnel.

In Fig. 6b, with the action step 131 by the Sensor 46 detects the stored thread length. Will the stored thread length is below, so is on one Weft break or close the end of a bobbin. With action step 132 the weaving rotor and the Metering device stopped synchronized with each other. Thereupon, with action step 133, the weaving rotor as well as the conveyor roller, the broken weft is assigned, operated synchronously and in crawl until the corresponding weft thread is completely entered. Then, with step 134, the Weft thread clamped by the clamping device 37 and cut by the cutter 51. Thereupon it branches to point "1" and a new weft thread submitted.

Action step 135 according to FIG. 6c monitors with the Sensor 46d the entry of a new weft 74 in the Web rotor 100. If there is no new weft entry, so with action step 136 the weaving rotor and the metering device 1 stopped synchronized, the Retracting the weft thread through the conveyor roller 40 and disposed of and those partially entered in the shed Weft threads 71, 72, 73 through action step 137 completely entered and the web rotor 100 stopped. It then branches to point "9" and the weft threads presented again.

In action step 138 according to FIG. 6d, the complete insertion of a weft thread through the sensor 46c and possibly by further along one Webfach distributed sensors 46e monitored. Becomes found that the weft did not reach the sensor 46c arrives, action step 139 causes the Web rotor 100 and the metering device 1 synchronized stopped and with action step 140 a signal for the operator for manual troubleshooting activated. If sensor 46c detects the absence of a The weft thread is determined on the entry side already cut so that this through the Metering device is no longer retractable. Are in Webfach further sensors 46e distributed, so is one Irregular entry in the shed lockable before the weft is cut. This The situation is not shown in the flow chart. It is however, it is obvious that in this situation the Weft automatically disposed of and a new weft could be presented.

Claims (23)

1. Apparatus (1) for remedying irregularities which occur during the insertion of a weft yarn (7) into a weaving rotor of a series shed weaving machine, comprising

   a conveyor device (4) which determines the speed of conveyance of the weft yarn (7) in a weft insertion direction (7e);

   a separation and deflection device (5) which follows after the conveyor device (4) in the weft insertion direction (7e) to cut the weft yarn (7) and convey it into a selectable unit;

   and at least one sensor (46a) for monitoring the weft yarn (7), with the apparatus (1) being arranged between a supply unit (2) positioned before it and a weft preparation unit (6) positioned after it,

   characterized in that the conveyor device (4) includes a yarn storage means (4a) for storing a length of weft yarn corresponding to at least one loom width (100) of the series shed weaving machine, and in that the conveyor device (4) can be actuated in a direction opposite to the weft insertion direction (7e) in order to pull the weft yarn (7) back out of the weft preparation unit (6).
2. Apparatus in accordance with claim 1, characterized in that the conveyor device (4) includes a conveyor roller (40) which serves as a yarn storage means (4a) for receiving a plurality of windings of the weft yarn (7), wherein the conveyor roller (40) can be actuated in a rotational direction (45a) in order to convey weft yarn (7) in the weft insertion direction (7e).
3. Apparatus in accordance with claim 1, characterized in that the yarn storage means (4a) is arranged positioned prior to the conveyor device (4) in the weft insertion direction (7e).
4. Apparatus in accordance with claim 3, characterized in that the yarn storage means (4a) includes a hollow body (4b) and a means (4c) for loading the hollow body (4b).
5. Apparatus in accordance with one of the claims 1 to 4, characterized in that the sensor (46a) is aligned onto the yarn storage means (4a) in order to measure the amount of yarn stored.
6. Apparatus in accordance with one of the claims 1 to 5, characterized by a yarn brake (3) arranged immediately following the supply unit (2) for braking or holding the weft yarn (7) with an adjustable force.
7. Apparatus (1) in accordance with one of the claims 1, 2, 4 or 6, characterized in that an insertion nozzle (41) and a capture nozzle (42) are provided which define an insertion axis (8) for the weft yarn (7), in that the conveyor roller (40) is pivotably journalled about a rotational axis (47a), in that the conveyor roller has a jacket surface for carrying the weft yarn (7), in that the insertion axis (8) extends above the conveyor roller (40), and in that the insertion axis (8) and the rotational axis (47a) form an angle a which is smaller than 90°.
8. Apparatus in accordance with claim 7, characterized in that the jacket surface of the conveyor roller (40) for carrying the weft yarn (7) includes a conically tapering first surface region (403) of width 'd' and an adjoining second surface region (404) of width 'c' which extends parallel or approximately parallel to the rotational axis (47a).
9. Apparatus in accordance with one of the claims 7 or 8, characterized in that the jacket surface has perforations in order to reduce the mutual contact surface between the conveyor roller (40) and the weft yarn (7) wound thereon.
10. Apparatus in accordance with one of the claims 7 to 9, characterized in that the conveyor roller (40) is formed as a cage and has support elements (48) which are separated in the circumferential direction on which the wound-on weft yarn (7) lies.
11. Apparatus in accordance with one of the claims 1 to 10, characterized in that the separation and deflection device (5) includes a weft yarn cutting device (51) for cutting the weft yarn (7) and a switching device (52) for supplying the weft yarn (7) either to the weft preparation unit (6) or to a storage container (55).
12. Apparatus in accordance with claim 11, characterized in that the separation and deflection device (5) has a conveyor channel (42a) leading to it and at least two conveyor channels (53a, 53b) leading away from it for transporting a weft yarn (7) by means of a fluid, in that a drive apparatus (56a) selectively positions the outlet opening (42b) of the conveyor channel (42a) into a position lying opposite to one of the inlet openings (53c, 53d) of the conveyor channels (53a, 53b), in that a gap or slit (57a) having a width (S1, S2) is formed between the outlet opening (42b) and the respectively positioned inlet opening (53c, 53d), with the minimum width of the gap (57a) being determined so that the blades (51f, 51g) of the cutting device (51a) can be inserted into the gap (57a).
13. Apparatus in accordance with claim 12, characterized in that the conveying channels (42a, 53a, 53b) are displaceable in the longitudinal direction (53e, 53f, 42c) in order to adjust the width (S1, S2) of the gap (57a).
14. Apparatus in accordance with one of the claims 11 to 13,
    characterized in that the conveyor channels (42a, 53a, 53b) and/or the inlet and outlet openings (42b, 53c, 53d) have different cross-sectional areas.
15. Apparatus in accordance with one of the claims 11 to 14,
    characterized in that the cutting device (51) is a pair of scissors with two cutting surfaces (51b, 51c) which cross each other.
16. Apparatus in accordance with one of the claims 11 to 15,
    characterized in that the cutting device (51) and the switching device (52) are driven commonly from the drive apparatus (56a), and in that a mechanical gearing element (51e) is provided in order to synchronize during the switching process the sequence of movements of the conveyor channels (42a, 53a, 53b) with those of the cutting process of the cutting device (51).
17. Method for operating the apparatus (1) of one of the claims 1 to 16 for remedying an irregularity which occurs during the insertion of a weft yarn (7) into a shed of a series shed weaving machine (102),
    characterized in that

    a predetermined length of weft yarn is stored in the yarn storage means (4a),

    the weft yarn (7) is continuously conveyed,

    an irregularity is detected,

    and when an irregularity of the weft yarn (7) occurs the weft yarn (7) is inserted completely into the shed or retracted completely out of the shed.
18. Method in accordance with claim 17, characterized in that

    the irregularity occurs as a breakage of the weft yarn (7) between the supply unit (2) and the conveyor unit (4),

    when an irregularity occurs insertion of the weft yarn (7) is completed and the weft yarn (7) is cut at the weft insertion side so that a residual weft yarn (7) remains,

    the series shed weaving machine is stopped,

    the residual weft yarn (7) is pulled completely out of the weft preparation unit (6),

    the residual weft yarn (7) is fed to a waste container (55),

    a weft yarn (7) is offered up,

    a predetermined length of weft yarn is stored in the yarn storage means (4a),

    and the series shed weaving machine is started and the weft yarn (7) introduced once more into the shed.
19. Method in accordance with claim 17, characterized in that

    when an irregularity occurs the series shed weaving machine is stopped,

    the weft yarn (7) is retracted completely out of the weft preparation unit (6),

    the weft yarn (7) is fed to a waste container (55),

    a weft yarn (7) is presented,

    a predetermined length of weft yarn is stored in the yarn storage means (4a),

    and the series shed weaving machine is started and the weft yarn (7] inserted once more into the shed.
20. Method in accordance with claim 17, characterized in that the irregularity consists of damage to the tip of the weft yarn (7) which occurs when, during downtime of the series shed weaving machine (102), the weft yarn (7) remains in the shed of the series shed weaving machine (102) for a prolonged period while being acted on by a fluid,

    the weft yarn (7) is retracted completely out of the weft preparation unit (6),

    a part of the length of the weft yarn (7) is fed to a waste container (55),

    the weft yarn (7) is cut,

    the series shed weaving machine is started and the weft yarn (7) inserted once more into the shed.
21. Method in accordance with one of the claims 17 to 20, characterized in that the length of yarn stored in the yarn storage means (4a) is measured by the sensor (46a) and in that a control signal is produced when the length of yarn falls below a prespecified length so that the irregularity can be remedied.
22. Method in accordance with claim 21, characterized in that, in a yarn storage means (4a) which is constructed as a conveyor roller (40), the entire width of the weft yarns (7) wound on the conveyor roller (40) is measured by the sensor (46a).
23. Series shed weaving machine having a weaving rotor and at least one apparatus (1) in accordance with one of the claims 1 to 16.

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