WO2010142264A1

WO2010142264A1 - Device and method for introducing the weft into a gripper weaving machine

Info

Publication number: WO2010142264A1
Application number: PCT/DE2010/000582
Authority: WO
Inventors: Johann Achberger; Anders Sibbesson; Ola Axelsson; Lars Kandell; Pär OHLSSON; Joakim Persson; Sten-Ake Nilsson
Original assignee: Lindauer Dornier Gesellschaft Mbh
Priority date: 2009-06-10
Filing date: 2010-05-27
Publication date: 2010-12-16
Also published as: EP2440697B1; CN102459733A; CN102459733B; DE112010002449A5; EP2440697A1

Abstract

On a gripper weaving machine, two weft threads (4, 5) are selected simultaneously from a number of weft threads for a web cycle according to a pattern, and presented to a bringer gripper head, gripped by same, and introduced into a shed (22). The weft threads (4, 5) are guided and clamped in the bringer gripper head (1) by separate elements, and positioned in such a way that they remain separated during the introduction of the weft.

Description

Device and method for weft insertion on a rapier loom

The present invention relates to a device and a method for weft insertion on a rapier loom. It is provided, two

Depending on the pattern, weft threads can optionally be entered simultaneously in a shed, these weft threads remaining separated from one another during weft insertion.

In looms various devices have become known in the art to enter weft threads by means of grippers in the shed of a loom. Usually it is intended to deduct in each weaving cycle only a single weft thread by a Bringer gripper from a supply reel and bring it to the center of the shed, where it is taken from a Holer gripper and transported to the other side of the shed. The shed consists of a bevy of warp threads, which run at right angles to the weft insertion and can be brought in various known positions in a known manner, so that between them an opening, namely the shed remains, in which the weft thread can be introduced. After the weft insertion, the weft thread is struck in a known manner by a reed to the already existing tissue, the warp threads are placed in a weaving dependent new position, so that a new weaving cycle can begin with a new weft insertion in a new shed. By known devices, a particular weft yarn can be selected from such a weaving machine from a number of different weft yarns kept ready on the supply reels for each weaving cycle depending on the weaving pattern, presented to the handler and entered into the shed.

Such a device for pattern-dependent selection and presentation of weft threads is known, for example, from US Pat. No. 4,785,856.

DE 1710292 A1 describes a device consisting of a Bringer gripper and a Holer gripper with which weft threads can be entered into a shed. The grippers consist of a gripper head and a gripper bar, which are alternately advanced by a gear in the shed and pulled back. It gripper heads are used, the Hold weft with clamping levers. These clamping levers are opened by a control device for receiving or releasing the weft thread or closed by spring force. When the selected weft thread is presented to the bringer rapier head, the selected weft thread is brought into the movement path of the bringer gripper at an angle to the weft direction. The weft thread comes into contact with a guide element and a clamping lever of the bringer rapier head by the movement of the bringer gripper in the direction of the shed. The guide element consists of a crescent-shaped guide opening in the main body of the Bringer rapier head. In this open guide, the weft thread is deflected from the direction of the trajectory of the gripper in a direction transverse to the trajectory. The clamping lever of the Bringer rapier head is opened at the time of the original and closed again after picking up the weft thread. When entering the shed thus the weft yarn is held by the clamping lever of the Bringer rapier head and deflected in the open guide. Between clamping lever and guide arises

Weft section, where the weft thread is detected by the clamping lever of the Holer gripper during the transfer of the weft thread to the Holer gripper. As can be seen, it is necessary for the function of this device that the Bringer gripper head is equipped with an element-to-guide and with a member for clamping the weft thread, so that between the two

Elements a weft thread portion is located freely in the gripper head, which can be detected by a clamp of the holer gripper.

The detection of a weft thread by means of a Bringer gripper head is also possible by the weft thread is drawn into a spring-loaded clamp, without this being opened by means of a control device. Such a technique is disclosed, for example, by EP 0 441 099 A1. Here, the open leadership of the weft thread consists of a bent sheet metal, which is integrated into the main body of the Bringer rapier head. The means for clamping the weft thread consists of a spring-loaded clamp with clamping parts which are shaped such that they form an insertion funnel, in which the weft thread is clamped, once it has been brought by the selection and presentation device in the movement path of the Bringer gripper. Between the open guide and the clamp again creates a free section of the weft thread, which can be detected by the transfer to the Holer gripper of this. In the After transfer, the clamp is not opened, but the weft thread is pulled out of the closed clamp.

For special applications, especially in the field of technical fabrics, it is necessary that two weft threads are simultaneously entered in parallel in a single shed, without being twisted. For this they must remain separated from each other when entering.

Gripper heads, where both weft threads are guided and clamped in the same place, are unsuitable for this, since in this case the two weft threads can touch uncontrollably and twisting can not be ruled out. For a rotation-free entry, it is necessary that the two weft threads are guided and / or clamped separated during the entry.

The EP 1135548 shows a Bringer-Geiferkopf, clamped in the two weft threads to be registered at the same time by a common clamp in the Bringer rapier head, but in different slot-like opening contours in the Bringer rapier head and thus partially separated during weft insertion.

EP 0 695 820 discloses a holer rapier head in which various

Weft threads are each clamped by a separate clamping plate. This should be entered simultaneously and safely with multiple weft threads with different thread textures with a rapier head.

The object of the present invention is to provide a device and a method for weft insertion on a rapier weaving machine, in which it is provided to enter, from a total of two or more weft threads depending on the pattern, for each weaving cycle optionally simultaneously two weft threads in a shed, wherein the weft threads in the gripper heads remain substantially separated from each other during the simultaneous weft insertion of both threads.

The object is achieved with a device and a method having the features of the independent claims. A device for weft insertion according to the present invention comprises a Bringer gripper and possibly also a Holer gripper with which weft threads can be entered into a shed. The grippers consist of a gripper head and a gripper bar or a rapier band, which are advanced in a conventional manner by a transmission alternately into the shed and pulled back.

The movement of the gripper in the shed takes place between a reed level and the edge of the already existing tissue to which a registered weft yarn is struck. Furthermore, the device according to the invention comprises means for pattern-dependent selection and presentation of weft threads, which are kept ready on supply reels. By a pattern-dependent programming, it is possible to select only one or two weft threads simultaneously from a number of several stocked weft yarns and submit to a gripper.

In the gripper head elements for guiding and for clamping the weft threads during weft insertion are provided.

The elements for guiding the weft threads are of the type that a weft thread which comes by the movement of the gripper in the region of the respective guide element, can be detected and taken away by this. Open guide contours according to the invention are e.g. half-sided eyelets or hooks, deflecting pins, baffles or hook-shaped contours on the main body of the gripper head. All such guide elements have in common that they have a contour, ie an edge or a surface on which the weft thread only rests when it is detected by the gripper head during its movement. The term open guide contour in the sense of the present invention thus refers to a guide element which obstructs the movement of the weft thread relative to the rapier head at least in one direction transversely to the longitudinal extent of the weft thread, but its unlimited

Movement in at least one other direction transverse to the longitudinal extent of the weft thread and allows an unlimited movement of the weft thread in its longitudinal extent.

The elements for clamping consist of clamps on a clamping lever or spring loaded, passively openable terminals through the thread.

However, other types of clamps known to those skilled in the art may also be present, e.g. active via actuators (piezo, pneumatics, magnets) controlled terminals.

There is a distinction between Bringer rapier head and Holer rapier head.

Bringer rapier head here is a gripper head referred to, which transports the weft thread after its detection by means of a forward movement through the shed; Forward refers to the direction to the hook tip. Holer rapier head here refers to a rapier head, which, after its detection, transports the weft thread through the shed by means of a backward movement; in this case, backwards designates the direction away from the gripper tip. The weft thread can, due to the above-described function of the open guide contour, after having e.g. a Bringer rapier head has been detected in forward movement of the Bringer gripper of the open guide contour, while it is released in a backward movement of the open guide contour. In a Holer rapier head, the function of the open guide contour is reversed with respect to the directions of movement.

The open guide contours and the weft thread clamps are arranged in the bringer rapier head such that a portion of the weft yarn remains between the clamp and guide, e.g. can be detected by the terminal at the transfer to a Holer gripper head.

It is generally sufficient if the separation takes place in such a way that the weft threads do not rotate with one another at the same time between the gripper head and the reed level, and the transfer to a holer gripper head can take place in such a separated manner that the two weft threads to be simultaneously inserted are also separated Can transport form further.

In a preferred embodiment of a device according to the invention it is provided that in the Bringer rapier head different from each other open guide contours when receiving the weft each in such a Position are that with two simultaneously presented weft threads each of a different open guide contour is detected.

For this purpose, the two weft threads must be brought by the selection and presentation facilities at two freely programmable, different positions in the movement path of the Bringer gripper.

In the preferred embodiment of the device according to the invention, the position of the one of the two open guide contours in Bringer rapier head in the presentation of the weft thread with respect to the position during weft insertion further up and closer to the hook tip than the position of the other of the two open guide contours. This is e.g. achieved by the fact that the open

Guide contour is attached to a lever which is mounted in the gripper head and can be mechanically or electrically rotated by suitable actuating means in one or the other position. The further to the hook tip position is used to keep the respective weft yarn separated when entering the other weft. The higher position is only needed when picking up the weft thread presented. When weft insertion itself a lower position makes sense, otherwise there is a risk that the open guide contour in the region of the shed detects and breaks one of the transverse to the weft insertion warp threads. In this embodiment, both weft yarns can be clamped by the same clamp of the bringer rapier head, since the open guide contours, rather than the clamp, are closer to the reed level, thus providing the open guide contours for separation during weft insertion. The various positions of the weft threads presented in the trajectory of the Bringer gripper are inventively possible, for example, characterized in that the selection and presentation facilities are arranged differently or differently driven that for one of the two weft threads another template position with respect to the Trajectory of Bringer Claw yields as for the other weft. For this purpose, for example, freely programmable, modular electromotive drive devices can be mounted at different heights in the vertical position above the movement path of the bringer gripper. Another possibility is to program the devices so that different high end positions are approached. Finally, it is also conceivable that the weft threads are brought by the respective selection and presentation device in a position in which they on Different high next to the trajectory of the Bringer gripper arranged thread stops come to rest, which thus determine different vertical positions of the weft threads with respect to the trajectory of the Bringer gripper. As a thread stop and a vertically arranged two-stage rail is conceivable in which one of the two weft thread is at a different level in a different vertical position than the other of the two weft threads. This rail can be arranged behind the movement path of the Bringer gripper so that the presentation device hangs up the weft threads there in two stages. The lying closer to the gripper tip of the Bringer gripper stage is higher than the more distant from the gripper tip stage.

However, the arrangement must be such that the rear of the two weft threads, after being grasped by the gripper, can slide over this higher front step without being damaged.

In a further embodiment of the device according to the invention also has a Holer gripper head open guide contours, which have such a distance from each other that each of the two simultaneously registered weft threads is detected by its own open guide contour and thus the two weft threads are registered with sufficient distance from each other. The associated terminal may also have separate clamping elements. Each of these clamping elements clamps only one of the two simultaneously registered weft threads.

Of course, all described embodiments also allow, depending on the pattern, only one weft thread to be selected from a number of multiple weft threads and presented to the bringer gripper.

In principle, it is also possible to transport the presented weft threads through the entire shed with only one bringer or holer gripper, without the weft threads being transferred to another gripper. For this purpose, for example, the Bringer rapier head is taken after receiving the weft thread from the side where the selection and presentation devices are arranged in a forward movement over the entire width of the shed to the opposite side, where he releases the weft again. When transporting the weft yarn alone with a holer rapier head moves this first from one side of the weaving machine through the whole shed, takes on the opposite side of the weft thread and transports this in a backward motion through the whole shed. In both cases, any selection and presentation of the weft threads and a separation of two simultaneously registered weft threads during transport is possible.

The method according to the invention provides that, depending on the pattern, a weft-picking head from a number of weft threads for a weaving cycle is simultaneously presented with two weft threads at the same time. It will be one of the two

Weft threads brought at a different position in the movement path of the rapier head and presented to the weft insertion than the other of the two weft threads. These are detected by the Bringer rapier head and entered into a shed. Within the Bringer rapier head, the weft threads are guided separately from different open guide contours. As a result, a separated entry of two jointly registered weft threads becomes possible. According to the invention, it is now provided for a bringer rapier head that, before entering the shed, one of the two weft threads is brought into another position so as not to disturb the weft insertion by unintentionally detecting warp threads from the open guide contours or clamps.

1 device according to the invention with a Bringer rapier head and selection and presentation devices, and a reed of a rapier, perspective view

FIG. 2 a shows a schematic representation of a first embodiment of the invention

Bringer gripper when detecting the weft threads presented, with an open guide contour in the higher position view from the reed level

Figure 2 b shows a schematic representation of a first embodiment of the Bringer gripper upon detection of the presented weft threads with an open guide contour in the higher position. View from above Figure 3 is a schematic representation of a first embodiment of the

Bringer gripper with an open guide contour in the lower position during weft insertion, view from the reed level

The sectional views A '-A' and A - A show the two different positions of the guide contour in FIGS. 2 and 3

FIG. 4 shows a schematic representation of an embodiment with a two-stage thread break,

Figure 5 is a schematic representation of the transfer from Bringer rapier head to a Holer gripper head in the middle of the loom, top view

FIG. 6 a shows schematic representations of a holer gripper head according to a

Embodiment of the device according to the invention,

View from the Web leaf level

FIG. 6 b schematic representations of a holer gripper head according to a

Embodiment of the device according to the invention,

View from above

FIG. 1 shows a bringer rapier head 1 and devices 2, 3 with which one or two weft threads 4, 5 are simultaneously presented to the bringer rapier head 1 from a number of several weft threads. The e.g. motor-driven devices 2,3 for pattern-dependent selection and presentation are independently controlled via a controller 15 independently programmable. There may also be more than 2 devices (2, 3, and controlled by the controller 15, in order to be able to select pattern-dependent for each weaving cycle from a larger number of weft threads.

The various positions of the weft threads 4, 5 provided are achieved by the geometric arrangement of the devices 2, 3 in conjunction with different specification of the strokes (double arrow) of the thread guide needles. The one end of each of the two weft threads 4, 5 is connected to its own thread supply, not shown, while the other two ends are held together at the binding point of the fabric. These ends are cut after detection of the weft threads 4, 5 by the bringer rapier head 1 in a known manner by a weft scissors, not shown, between the bringer rapier head 1 and the binding point. The weft threads 4, 5 are pulled off the thread supply in the direction of the arrow of the bringer rapier head 1 and inserted into the shed 22.

FIG. 2 a shows an embodiment of the bringer rapier head 1 according to the invention with two different open guide contours 6, 8 and a lever 12 to which the open guide contour 8, 8 'is attached, and a clamp 7 in a side view from the direction of the reed plane 21. FIG. 2 b shows the embodiment of the bringer rapier head 1 according to the invention shown in FIG. 2 a in a view from above.

In this embodiment, the open guide contours are 6,8 arranged in Bringer rapier head 1 closer to the reed plane 21 as the terminal 7; between them is the above-mentioned thread portion of the weft threads 4,5. The open guide contours 6,8 are designed in an advantageous manner as a crescent-shaped, open in the direction of the hook hook. At this point, according to the invention, there may also be open guide contours in other shapes, e.g. Deflection pins on which the weft is applied from one side or baffles or other elements that fulfill the above-described function of the open guide contour. In this way, presented weft threads can be detected during the forward movement of the gripper head in the direction of its tip from the open guide contours 6,8, deflected and taken away, while at an opposite movement, the weft threads through the open guide contours 6.8 released be, that is, detach from the rapier head. The open guide contour 6 is integrated in this embodiment in the main body of the Bringer rapier head 1 in the form of a crescent-shaped in the direction of the hook tip open hook.

Through the movement of the lever 12, the open guide contour 8 can be brought from the position 8 to the position 8 '. This is necessary because otherwise in the forward movement, so one on the Gripper tip directed towards movement (arrow) the open guide contour 8 would first capture the weft 4 and then the weft 5. By two vertically and horizontally different original positions of the weft threads 4 and 5 and vertically and horizontally different receiving positions of the two open guide contours 8 'and 6 is achieved that the weft 5, which has been submitted closer to the top of the Bringer rapier head 1, from the open guide contour 8 in their position 8 'can be detected while the weft thread 4, which has been presented further away from the top of the bringer rapier head 1, is detected by the open guide contour 6. The vertically and horizontally different original positions of the weft threads 4, 5 can be generated by the geometric arrangement as well as by the free programmability of the devices 2, 3.

In the illustrated embodiment, the change in the position 8 -> 8 'via a common movement of the lever 12 and the clamping lever 7b. Both levers are rotatably mounted on the hinge pin 7c in Bringer rapier head 1. The fact that the clamping lever is brought into the position 7b ', the terminal 7 opens so that they can detect the weft or the weft 4.5. To enter this in a further forward movement of the Bringer rapier head 1 in the shed 22, the clamp 7, however, must be closed, so that the weft thread does not slip out. According to the invention, the open guide contour 8 together with the weft thread 5 guided out of the position 8 'or 5' is brought back into the position 8 or 5 for insertion into the shed, since this reduces the risk that warp threads, e.g. due to warp staples in the shed 22 are in the wrong position, are inadvertently detected and demolished by the open guide contour 8. The common movement of clamping lever 7b and lever 12 ensures the described function in an advantageous manner.

The lever 12 can also be designed so that the weft thread 4, the position of which is not changed after the pickup by the bringer rapier head 1, can pass unhindered between the open guide contour 6 and the clamp 7. It can be seen that, for this purpose, the lever 12 has, for example on the underside, a recess through which the weft thread 4 passes when the lever 12 is in its insertion position with the other weft thread 5. This recess is designed in the illustrated embodiment of the invention so that the open guide contour 6 at a movement of the lever 12 in the insertion position of the Contour of the recess is enclosed in such a way that during the weft insertion slipping out of the weft thread 4 from the open guide contour 6 is avoided. When transferring to a holer gripper head 16, the lever 12 must also be actuated in this case in order to release the weft thread 4

FIGS. 2 a and 2 b also show how, via a control device 13, clamping levers 7b and lever 12 are actuated. The control device consists for example of a plastic rail, which starts on a control surface of the clamping lever and thereby pushes it down; the opposite movement is e.g. produced by a skilled worker known, acting on the clamping lever leaf spring in Bringer rapier head 1. The control rail can be operated via drive elements to the rest of the drain fitting vertically (double arrow). Such drive elements known to those skilled in the art may e.g. Be levers that are driven via cams. In Webmaschinenmitte may be provided instead of the control rail, a single lever which engages through the warp threads to open the clamp 7, when the weft yarn to be passed to a Holer gripper head.

Figure 3 shows the same view as Figure 2a, but after the change of the position of the clamping lever 7b and the lever 12 in the position for introducing the weft thread in the shed 7b '-> 7b, 8' -> 8th

Figure 4 shows that the rear, the reed level 21 closer vertical position of the weft threads 4,5 can be fixed by a thread stop 10 fixed. In this case, the thread stopper 10 two different thread supports 11, 11 ', so that each weft 4.5 is detected by another open guide contour 6.8 and thus both weft threads are separated 4.5 registered from each other. In this case, the devices 2, 3 are arranged geometrically such that the various weft threads 4, 5 are presented horizontally at points located at different distances from the tip of the bringer rapier head 1. In the vertical direction, the devices 2, 3 are activated in such a way that the weft threads are drawn down beyond the thread stop and thus placed on the thread layers 11, 11 'of different height. FIG. 5 shows, in a top view, an embodiment of a device according to the invention in which, during the weft insertion in the shed, the weft threads 4, 5 are transferred from a bringer rapier head 1 to a holer gripper head 16. The double direction arrows indicate the oscillating movements of both grippers, which meet in the shed 22 to transfer the weft.

In Figure 6a, b, a Holer gripper head 16 with separate open guide contours 17,18 can be seen. As a result, even in the holer rapier head 16 during the simultaneous transport of two weft threads 4, 5 remain separated from one another. The open guide contours 17, 18 can be present in different embodiments, in the same way as on the bringer rapier head 1, e.g. as a crescent-shaped hook or deflection pins or baffles or other elements that fulfill the function described above. These open guide contours 17, 18 on the holer gripper head 16 also permit movement of the weft thread in its longitudinal direction in each case. However, they hinder the movement of the weft thread relative to the gripper head in at least one direction transverse to the longitudinal extent of the weft thread and allow its movement in at least one other direction transverse to the longitudinal extent of the weft thread. The weft threads 4.5, after being presented to the holer gripper head 16 by the bringer rapier head 1 in the shed 22, are detected and transported during a backward movement of the gripper gripper head 16, ie a movement directed away from its tip. Those investment and deflection surfaces of the open guide contours 17,18, the movement of the

Weft threads 4.5 in a direction transverse to their longitudinal extent hinder, are arranged such that the weft threads hang there in a backward movement of the holer rapier head 16. In order for the weft threads 4, 5 to be able to be detected by the open guide contours 17, 18 during this rearward movement, the weft threads 4, 5 must first be brought over the abutment and deflection surfaces during a forward movement of the holer gripper head 16. In order for this to be possible, the open guide contours 17, 18 are rounded off on one side so that weft threads 4, 5 coming from one side can glide over them, while they get caught on the bearing and deflection surfaces coming from the other side. The holer gripper head 16 may have a clamp 14 with clamping elements which hold the thread in the closed state during the movement of the gripper between them. In a preferred embodiment, one of the clamping elements is attached to a lever 23 which is mounted in the gripper head by means of a hinge pin 25, so that the terminal 14 can be actively opened in a known manner via control devices.

The clamp 14 consists of an upper clamping element 24 and separate clamping elements 19, 20 for the weft threads 4,5. These are in a preferred embodiment of the device according to the invention in the base body of the holer rapier head 16 so mounted separately from each other, that they with a common upper clamping element 24, the e.g. Part of a clamping lever 23 is cooperate. In order to enable a clamping of the two weft threads 4, 5 to be transported together, independent of different thread thicknesses, two clamping elements 19, 20 are separated from one another, e.g. stored over elastic supplements.

Conceivable but also separately mounted clamping springs in the case of clamping elements with spring plates. Such separate clamping elements 24, 19, 20 can of course also be provided on the bringer rapier head 1 instead of the clamp 7. Likewise, several terminals which can be actively opened via actuators can also be arranged in the holer gripper head 16.

REFERENCE CHARACTERS

1 Bringer rapier head

2, 3 means for selecting and presenting

wefts

4,5,5 'weft threads

6,8,8 'open guide contour

7 clamp

7b, 7b 'clamping lever

7c hinge pin

10 thread stop

11, 11 'thread supports

12, 12 'lever for positioning

13 control device

14 clamp

15 ^• Control

16 Holer rapier head

17,18 Open guide contour

19 clamping element

20 clamping element

21 reed

22 shed

23 clamping lever

24 clamping element

25 hinge pins

Claims

claims

1. A method for weft insertion on a rapier loom, in which selected from a number of weft threads for a weaving cycle two weft threads (4,5) simultaneously submitted to a Bringer rapier head (1), detected by this and registered in a shed (22) in which one of the two weft threads (4, 5) is brought into the movement path of the bringer rapier head (1) at another position and presented to it for weft insertion than the other of the two weft threads (4, 5) and the weft threads ( 4.5) guided by the Bringer rapier head (1) by means of two different open guide contours (6, 8) and clamped by a clamp (7), characterized in that prior to the entry of the Bringer rapier head (1) in the shed ( 22) is brought one of the open guide contours (8) together with the guided therein weft thread (5) with respect to the Bringer rapier head (1) from a first position (8 ') in a second position (8).

2. The method according to claim 1, characterized in that the one of the open guide contours (8) together with the guided therein weft thread (5) from a relative to the Bringer rapier head (1) further up first position (8 ') in a lower placed second position (8) is brought.

3. Bringer rapier head (1) for a rapier with a first open guide contour (6) for guiding a first weft thread (4) and a clamp (7) for clamping weft threads (4,5), and with a second open

Guide contour (8) for guiding a second weft thread (5), characterized in that the second guide contour (8) together with the weft thread (5) guided therein in two different positions (8,8 '/ 5,5') can be brought.

4. Bringer rapier head (1) according to claim 3, characterized in that the second guide contour (8) from a relative to the Bringer rapier head (1) located further above first position (8 ') in a lower second position (8) can be brought is.

5. Bringer rapier head (1) according to claim 3 or 4, characterized in that the second guide contour (8) is part of a within the Bringer rapier head (1) linearly or rotationally movable in two positions lever (12).

6. Bringer rapier head according to claim 5, characterized in that the movable lever (12) has a recess whose contour in a position of the lever (12) surrounds the first open guide contour (6) such that during weft insertion slipping out of the weft thread (4) from the first open guide contour (6) is avoided.

7. Bringer rapier head according to claim 5 or 6, characterized in that the clamp (7) on a clamping lever (7b) is mounted and that the lever (12) via the clamping lever (7b) is linearly or rotationally movable.

8. A device for weft insertion in a shed (22) on a rapier with a Bringer rapier head (1) according to one of claims 3 to 7 and with means (2,3), with which from a number of weft yarns simultaneously two weft threads (4 5) and can be presented to the bringer rapier head (1), wherein one of the two weft threads (4, 5) can be brought into the trajectory of the bringer gripper (1) at another position and presented to the weft insertion device as the latter other of the two weft threads.

9. A device for weft insertion into a shed (22) on a rapier with a Bringer rapier head (1) according to one of claims 5 to 7 and with means (2,3) with which from a number of weft threads simultaneously two weft threads (4, 5) are selectable and can be submitted to the Bringer rapier head (1), wherein one of the two weft threads (4, 5) can be brought into another position in the movement path of the Bringer gripper (1) and presented to the weft insertion as the other the two weft threads (4,5) and with control means (13) are provided which generate the linear or rotational movement of the lever (12).

10. Device according to one of claims 8 or 9, characterized in that for weft insertion a Bringer rapier head (1) and a Holer gripper head (16) are present, wherein the Holer gripper head (16) has two open guide contours (17,18), which are arranged such that both weft threads (4,5) are separately feasible.

11. The device according to claim 10, characterized in that the Holer- rapier head (16) has two separate clamping elements (19, 20) are provided, with which both weft threads (4,5) are separated from one another clamped.