DEVICE FOR MAKING A BRAIDED WRAP

Description

[0001] The invention relates to a device for producing a braided covering around a long object, wherein the device comprises a warp thread frame rotating about a machine axis in a warp thread rotation direction and a group of warp thread spools, and a group of spool carriers rotating about the machine axis in the opposite direction, each with at least one weft thread spool, wherein at least one warp thread is guided from each warp thread spool to a braiding point, and wherein at least one weft thread is guided from each weft thread spool to the braiding point, and wherein the course of the warp thread can be shifted alternately above and below the weft thread rotating past it in the opposite direction by means of a laying device, and wherein the device comprises a spool carrier support that rotates with the warp thread frame in the warp thread rotation direction during operation.the coil carriers are attached to the coil carrier support when the machine is at a standstill.

[0002] Devices of this type are already described in detail in the prior art, for example in EP 0441604 A1 or EP 2405045 A1.

[0003] The bobbin holders of the device disclosed in EP 2405045 A1 have a carriage that is guided in a circular guide track formed by an inner and an outer roller ring. The roller rings are arranged on a support plate in which slots are provided that receive the warp threads in the lower position, so that the respective bobbin holder with the weft thread can be guided past above. The bobbin holders are driven by gears that are also arranged on the support plate. The support plate rotates with the warp thread assembly so that the slots are always aligned with the corresponding warp thread. The carriages arranged in the guide track must be guided radially both on the outside to absorb the centrifugal force and on the inside. Furthermore, the carriages must be guided axially due to their own weight and the weight of the bobbin holders.In practice, it turns out that even with this type of guide, pure rolling motion cannot be achieved. In particular, sliding friction occurs at the edges of the slides, which must be designed to absorb the axial forces. This leads to heating and significant wear, and reduces the achievable rotational speeds.

[0004] The use of plain bearings along which the coil carriers are guided is also known in the prior art; however, this results in even greater problems with heat generation and wear. Such plain bearings also require large quantities of lubricants, which can contaminate the braided sheathing. Such a design is shown, for example, in WO 2003 / 064747 A1.

[0005] GB 217635 A describes a braiding machine in which bobbin holders are fitted over the edge of a guide by means of a U-shaped head and guided in a groove on the guide by means of keys. The bobbin holders are thus guided by plain bearings, with the aforementioned disadvantages. The resulting tilting moments acting on the bobbin holders are reduced by the centrifugal forces acting during operation.

[0006] The object of the present invention is to overcome the disadvantages of the prior art. In particular, the invention aims to provide a dry-running device for producing a braided sheath, thus eliminating the need for lubricants. This is required, for example, for cable sheathing in hospital environments.

[0007] These and other problems are solved according to the invention by a device of the type mentioned at the outset, wherein the coil carrier is dimensioned such that the bearing force on the coil carrier support becomes zero when a preset speed is exceeded. The preset speed can either correspond to the operating speed or be lower. This allows the coil carrier to essentially "float" above the coil carrier support without contact when the preset speed is exceeded (i.e., particularly also at the operating speed). Thus, no friction occurs between the coil carrier and the coil carrier support, and no lubrication is required. Only when starting the device does the coil carrier slide briefly on the coil carrier support until the lowest preset speed is reached at which the bearing force becomes zero.

[0008] Advantageously, the spool carrier can have a centrifugally oriented guide surface at the end facing the machine axis. This guide surface is mounted on a roller ring consisting of guide rollers arranged on a roller carrier plate. A single roller ring to which the guide surface is mounted is sufficient, since no axial forces or tilting moments need to be transmitted between the roller ring and the guide surface. The guide surface can be curved in one or two directions according to the outer profile of the guide rollers. The roller ring only needs to exert an inward radial force on the spool carrier, directed towards the machine axis, which counteracts the force resulting from gravity and centrifugal force. At a given rotational speed, gravity and centrifugal force are in a constant ratio to each other.Therefore, the fact that the direction of the resulting force does not change when the weight of the weft bobbin decreases during unwinding can be exploited, as long as the rotational speed of the bobbin holder remains constant. Only the center of gravity of the bobbin holder may shift, but the effects of this can be minimized through design. Alternatively, in a functional reversal, downwardly or upwardly projecting guide rollers can be arranged at the end of the bobbin holder facing the machine axis, engaging with corresponding, ring-shaped guide surfaces that rotate with the warp thread frame.

[0009] As long as the line of action of the resultant force passes through the area where the guide surface contacts the roller ring, the forces can be kept in equilibrium. With cylindrical rollers and a (in cross-section) flat guide surface, this results in a speed range in which the guide surface rests against the

[0010] the outer contour of the cylinders is in contact with the cylinder and the resulting force is in equilibrium with the centripetal force.

[0011] Advantageously, the guide rollers can have a convex or concave outer contour. This allows for a "point-like" contact between the guide surface and the roller ring, whereby the position of the contact point shifts depending on the line of action of the resulting force and automatically moves into a region of force equilibrium. This allows the force equilibrium between centrifugal force, gravitational force, and centripetal force to be maintained over a wide speed range.

[0012] In an advantageous embodiment, the bobbin holders can comprise a bobbin holder shoe, to which a bobbin holder drive is attached, and a bobbin holder body, which holds the weft thread bobbin. The bobbin holder shoe can simultaneously form the sliding surface, which, when stationary, rests against a bearing surface of the bobbin holder support and slides on this bobbin holder support during start-up (i.e., before reaching the set speed). Once the set speed is reached, the bearing force drops to zero, so that an air gap forms between the sliding surface and the bearing surface of the bobbin holder support, and sliding friction no longer occurs.

[0013] Advantageously, the coil carrier shoe and the coil carrier body can be connected to each other in a way that allows them to slide in both the centrifugal and vertical directions. This ensures that only the driving forces directed in the direction of movement are transmitted from the coil carrier drive to the coil carrier body via the coil carrier shoe.

[0014] In a further advantageous embodiment, the bobbin holder can include a tension measuring unit and a bobbin brake with a control unit for regulating the weft thread tension. For example, the weft thread can be guided by a roller arrangement, one of which is arranged on a lever whose bending load (caused by the weft thread tension) is measured with a strain gauge. The bobbin brake regulates the weft thread tension to a predetermined value.

[0015] The control unit can advantageously include a thread break detection unit. A thread break detected by the tension measuring unit can be signaled, for example, either with or without contact. For instance, the thread break detection unit can have an LED mounted on the bobbin holder that illuminates in the event of a thread break. The LED is detected by a light sensor located outside the rotating part and the signal is transmitted to the machine control, which stops the drive. Alternatively, signaling can be contact-based.

[0016] In a further embodiment according to the invention, the power supply to the control unit can be provided via a sliding contact arrangement or via a device for electromagnetic induction.

[0017] The present invention is described below with reference to the Figures 1 to 3In more detail, the invention is explained, and exemplary, schematic, and non-restrictive embodiments are shown. This includes showing Fig. 1 an embodiment of the device according to the invention in a top view, Fig. 2 the device in a sectional view along the in Fig. 1 depicted line II-II, and Fig. 3 Another embodiment of the device according to the invention in a sectional view.

[0018] The Fig. 1 and 2 For the sake of clarity, each illustration shows only a part of an embodiment of the device according to the invention for producing a braided covering 1 around a long object 2. In the illustrations of the Fig. 1 and 2The relative sizes were partially modified independently to improve clarity and recognizability. The long object could, for example, be a cable core sheathed in a braided shield made of metal threads or wires. However, other materials could also be used for the braided sheathing. Materials suitable for braiding, which can be unwound, are generally referred to here as "thread," regardless of the specific material.

[0019] The long object 2 is fed to the device from below along a machine axis 4 and can, for example, be unwound from a roll, as is known in the field. The feed speed of the long object 2 is matched to the drive speed of the parts rotating around the machine axis 4. A warp thread frame 5 rotates along a warp thread rotation direction 3, whereby a number of warp threads 9 are unwound from warp thread spools 6 arranged on the warp thread frame 5 and guided via a laying device 12 to a braiding point 10 on the long object 2. The laying device 12 can, for example, be designed as a lever construction known per se, wherein, depending on the rotation angle of the warp thread frame 5, a deflection point 22 of the laying device 12 is positioned between a lower position (in Fig. 2 designated as deflection point 22) and an upper position (in Fig. 2The warp thread 9, shown in dashed lines and labeled as deflection point 22', is moved back and forth. In both positions, the warp thread 9 runs directly from deflection point 22 to the braiding point 10. The warp thread spool 6, the laying device 12, and the deflection point 22, 22' are shown in Fig. 1 and 2 They are only shown schematically, as they are already known to the expert.

[0020] At the center of the device is a roller carrier plate 18, which rotates with the warp thread frame 5. A roller ring consisting of a plurality of guide rollers 17, whose function is described below, is arranged projecting upwards from the edge of the roller carrier plate 18. The roller carrier plate 18 has a number of radially oriented radial slots 23, which receive the warp threads 9 in their lower position, with the warp thread 9 running below the guide rollers 17 in this lower position.

[0021] Between the roller carrier plate 18 and the position of the warp thread bobbins 6 or the laying devices 12, a bobbin support 13 is provided, which also rotates with the warp thread frame 5. The bobbin support 13 has several vertical slots 24 which receive the warp threads 9 in their lower position, the warp thread 9 running below a support surface 25 of the bobbin support 13 in the lower position.

[0022] A number of bobbin threads 11, typically corresponding to the number of warp threads 9, are guided to the braiding point 10 via corresponding weft thread bobbins 8, each arranged on a bobbin carrier 7. The bobbin carriers 7 rotate in a direction 26 opposite to the direction of rotation 3 of the warp threads, whereby the path of the bobbin thread 11 remains essentially unchanged with respect to a coordinate system rotating with the bobbin carrier 7 (which can be defined as the centrifugal direction y, direction of movement x, and vertical direction z). The bobbin thread 11 runs below the upper position of the warp thread 9 and above the lower position of the warp thread 9. By alternately laying the warp thread 9 above and below the weft thread 11, which rotates past in the opposite direction, the braided covering 10 is formed at the braiding point 10 via the laying device 12.If necessary, several threads from a single warp thread spool 6 and / or weft thread spool 8 can be fed to the braiding point 10 simultaneously.

[0023] Alternating above and below the weft thread 11 does not necessarily mean that the laying device 12 moves the warp thread 9 up (or down) after each weft thread 11 of each weft thread spool 8. Of course, the laying device 12 could also change the position of the warp thread 9, for example, after every second or every fourth passing weft thread spool 8. This depends essentially on the desired predefined braiding pattern. Corresponding braiding patterns and methods for their production are known in the field.

[0024] Even if in Fig. 1Although only the path of a single warp thread 9 and a single weft thread 11 is shown, it is apparent that, for practical implementation, a multitude of warp threads 9 and weft threads 11 are guided to the braiding point 10 via corresponding warp thread spools 6 and spool carriers 7. For example, in the illustrated embodiment, eight warp threads can be guided to the braiding point 10, and an equal number of spool carriers 7 can be provided.

[0025] Each bobbin holder 7 essentially consists of a weft thread bobbin 8 on which the weft thread 11 (or several weft threads 11) are wound, a bobbin holder body 19, at the radially outer end of which the weft thread bobbin 8 is arranged, and at the radially inner end of which a guide surface 16 is arranged, bearing against the inside of the guide rollers 17 of the roller ring on the roller carrier plate 18. A bobbin holder shoe 14 is arranged on the underside of the bobbin holder body 19, which connects to a bobbin holder drive 15. The bobbin holder drive 15 can be a known arrangement of gears that mesh with teeth provided on the bobbin holder shoe 14.The gears of the bobbin carrier drive 15 can be arranged on the warp thread frame 5 and rotate with it, or they can be arranged on a unit detached from the warp thread frame 5 and, if necessary, driven by the rotation of the warp thread frame 5 (or by parts rotating with it) via corresponding gear connections. The gears of the bobbin carrier drive 15 move the bobbin carrier shoes 14 in a bobbin carrier rotation direction 26 opposite to the warp thread rotation direction 3, with the bobbin carrier shoes 14 in turn moving the bobbin carrier bodies 19. The rotational speed of the bobbin carriers 7 is synchronized with the rotational speed of the warp thread frame 5 in order to coordinate the up and down movement of the deflection points 22, 22' of the warp threads 9 with the bobbin carriers rotating past in the opposite direction.

[0026] A tension measuring unit 20 is provided on the upper side of the spool carrier body 19, which measures the tensile tension acting on the weft thread 11. The tension measuring unit 20 can, for example, consist of a roller arrangement with three rollers offset from one another, through which the weft thread 11 is guided such that the middle roller is pressed outwards by the weft thread tension. The middle roller is mounted on a lever to which a strain gauge is attached, with which the pressure on the roller and thus the weft thread tension is measured. These parts are shown in the diagram for clarity. Fig. 1 and 2(Not shown in detail.) A control unit 30 is arranged in a protected area of ​​the bobbin carrier 7, for example below the bobbin carrier body 19 or integrated into the bobbin carrier body 19. This control unit evaluates the signals from the tension measuring unit 20 and, according to known control algorithms, generates a braking signal for a bobbin brake 21 to maintain the tension of the weft yarn 11 within a set range. The control unit 30 and the bobbin brake 21 can supply their power via a power supply (not shown), which can be supplied, for example, via sliding contacts. The sliding contacts can be arranged, for example, in the area of ​​the bobbin carrier support 13, with the bobbin carrier 7 having corresponding contacts that briefly come into contact with the sliding contacts as they rotate past, thereby transmitting a current pulse that supplies the power supply.Alternatively, the power supply units of the coil carriers can also be contactless, for example by magnetic induction coils that are arranged on the coil carrier and are moved by the magnetic field of counter-rotating or stationary magnets, so that the induction coil is traversed by electromagnetically induced current.

[0027] A thread break can also be easily detected via the control unit 30 if the tension suddenly drops to zero. This can be signaled to the machine control system using both contact-based and contactless signaling methods. For example, a signal can be transmitted via sliding contacts, or a radio or light signal can be transmitted. For instance, a simple LED could be provided on the bobbin holder 7, which would light up in the event of a thread break. A detection device on the machine would recognize the light signal and transmit a signal to the machine control system, which would then stop the device. Of course, a control of the warp thread tension could also be implemented analogously for the warp thread(s) 9, although this has been omitted from the figures for the sake of clarity.For this purpose, for example, the control unit 30 could be used, or a separate control unit could be provided. The control unit 30 or the separate control unit would then regulate the tension of a hook and loop thread 9 in a known manner. Of course, this would in turn require a corresponding tension measuring unit to determine the warp thread tension, i.e., the tension acting on the warp thread 9, as well as a bobbin brake for the warp thread bobbin 6, each of which would have to be provided at a suitable location on the warp thread frame 5. The tension measuring unit for the warp thread 9 can, for example, be designed as described above. If several warp thread bobbins 6 are provided, the control unit can, of course, also be used to regulate the tension of several warp threads 9.

[0028] The coil carrier shoe 14 is connected to the coil carrier body 19 with play, allowing relative movement of the coil carrier body 19 with respect to the coil carrier shoe 14 along the centrifugal direction y and the vertical direction z, or more generally along two axes in the plane perpendicular to the direction of movement x. This can be achieved, for example, by one or more bolts 27 engaging in elongated holes 28 arranged perpendicular to the direction of movement x. The bolts 27 can be arranged projecting upwards on the coil carrier shoe 14, with the elongated holes in the coil carrier body 19, or vice versa. This arrangement with play ensures that the driving forces are transmitted to the coil carrier body 19 only in the desired driving direction (i.e., in the direction of movement x).In the centrifugal direction y, the coil carrier body 19 is held only by the guide surface 16, which rests against the guide rollers 17, which absorb the centrifugal forces.

[0029] The coil carrier shoe 14 is arranged on the coil carrier support 13, the coil carrier shoe 14 having at least one sliding surface 29 which is arranged opposite at least one bearing surface 25 of the coil carrier support 13. However, the sliding surface 29 of the coil carrier shoe 14 only rests on the bearing surface 25 when the device is at rest and only slides on it briefly during the machine's start-up. This is because the coil carrier 7 and the guide rollers 17 are designed such that the bearing force of the coil carrier 7 on the bearing surface 25 of the coil carrier support 13 is reduced to zero as soon as the rotational speed exceeds a preset speed, and particularly while the machine is running at operating speed. Since no bearing force is then exerted normally on the bearing surface 25 of the coil carrier support 13, i.e., in Fig. 1In the vertical direction z, an air gap forms between the sliding surface 29 and the support surface 25. Although very narrow, this gap effectively prevents any sliding friction. The formation and stability of the air gap can be promoted by the shape of the coil carrier shoe 14, and additional aids can be provided to ensure the air gap, such as air nozzles in the support surface 25 and / or pairs of magnets that pull or repel the coil carrier shoe 14 upwards. However, since no significant contact pressure acts between the coil carrier 7 and the coil carrier support 13, even occasional light contact and rubbing of the parts would be unproblematic due to the low relative forces.

[0030] To ensure that the support forces become zero above a specified rotational speed, the following parameters in particular must be selected appropriately: The position of the spool carrier support 13 and the inclination of the support surface 25. The position and, if applicable, the axial inclination of the guide rollers 17. The outer contour of the guide rollers 17 (or the corresponding shape of the guide surface). The center of gravity of the spool carrier 7 and the change in the center of gravity between a full weft thread spool 8 and an empty weft thread spool 8.

[0031] These parameters must be selected such that, when the coil carrier 7 rotates about the machine axis 4, an equilibrium of the forces acting on the coil carrier 7 is established. The forces to be considered are: The gravitational force FS acting in the negative z-direction due to the weight of the coil carrier 7, which passes through the center of gravity. The centrifugal force FZ, which depends on the rotational speed and the weight of the coil carrier 7, also passes through the center of gravity and acts in the y-direction. The guiding force FF applied by the guide rollers 17 to the guide surface 16.

[0032] The tensile force of the weft thread, on the other hand, is irrelevant due to its low intensity and can be neglected.

[0033] The gravitational force FS and the centrifugal force FZ can be considered as a resultant force FR, directed obliquely outwards and downwards in the yz-plane. It is important to note that the inclination of this resultant force does not change if the weight changes, provided the rotational speed remains constant, since both the centrifugal force and the gravitational force are dependent on the weight and therefore (assuming a constant rotational speed) are in a fixed ratio to each other. The weight changes, in particular, when the weft thread 11 is continuously unwound from the weft thread spool 8, and the weft thread spool 8 becomes lighter in the process.

[0034] The forces are in equilibrium, in particular, when the line of action of the resultant force FR coincides with the line of action of the guiding force FF and the two forces are opposite. The calculation and design of specific embodiments of the device according to the invention, with knowledge of the teachings disclosed herein, is within the capabilities of a person skilled in the art.

[0035] Fig. 3 Figure 1 shows a further exemplary embodiment of the device according to the invention in a vertical sectional view transverse to the direction of movement, i.e., along the yz-plane. For the sake of comparability and better understanding, elements corresponding to the parts already described are provided with identical reference numerals.

[0036] The in Fig. 3 The illustrated device has a warp thread frame 5 rotating in the warp thread rotation direction 3 with warp thread spools 6 (in Fig. 3(not shown). From each warp thread spool 6, a warp thread 9 is guided via a laying device 12 to a braiding point 10, which lies on a long object 2 guided along a machine axis 4. Depending on the rotation angle of the warp thread frame 5, a deflection point 22 of the laying device 12 is moved back and forth between a lower position (deflection point 22) and an upper position (deflection point 22' - shown in dashed lines).

[0037] On the warp thread frame 5, a bobbin support 13 is arranged in a position radially within the laying device 12. This support has a bearing surface 25 that slopes obliquely outwards. The bobbin support shoes 14 of the bobbin carriers 7, which rotate in the opposite direction to the bobbin support 13, are arranged on the bobbin support 13. The bobbin support shoes 14 each have a sliding surface 29 that is parallel to the bearing surface 25. As soon as a preset rotational speed is exceeded, an air gap forms between the sliding surface 29 and the bearing surface 25, so that no sliding friction occurs.The coil carrier shoes 14 are driven via the gears of a coil carrier drive 15 and the coil carrier shoe 14 is connected with a coil carrier body 19 of the coil carrier 7 in an analogous manner as in the embodiment described above, with a relative movement of the coil carrier body 19 with respect to the coil carrier shoe 14 along the centrifugal direction y and the vertical direction z, or generally along two axes in the plane arranged transverse to the direction of movement x, is possible.

[0038] The bobbin carrier drive 15 has a plurality of bevel gears 34 which are arranged circumferentially inside and below the bobbin carrier supports 13 (leaving the slots for the warp threads 9 clear). The axes of the bevel gears 34 are mounted to rotate with the warp thread frame 5 and are driven via corresponding gear arrangements to drive the bobbin carrier shoes 14 in the bobbin carrier direction of rotation 26, the speed being synchronized with the movements of the laying device 12.

[0039] Radially inside and slightly above the spool support 13, a roller ring consisting of a plurality of guide rollers 17 is arranged, wherein instead of a roller support plate in the embodiment of the Fig. 3A roller carrier 31 is provided, attached to the warp thread frame 5 and rotating with it, on which the guide rollers 17 are mounted at the top. Slots are provided on both the bobbin support 13 and the roller carrier 31, in which the warp threads are received in their lower position (i.e., between the lower deflection point 22 and the braiding point 10).

[0040] The guide rollers 17 have a profiled contour with a concave outer surface. A correspondingly profiled guide surface 16 is attached to the profiled contour of the guide rollers 17 and is provided on a hook-like projection 32 of the coil carrier body 19. The curvature of the guide surface 16 can have a radius matching the radius of curvature of the concave outer surface or a slightly smaller radius. Instead of a circular curvature, a more complex curvature shape can also be used. The profiled contour of the guide rollers 17 and the guide surface 16 allows a guiding force FF to be applied from the guide rollers 17 to the coil carrier 7, the angle of which adapts to the course of the line of action 33 of the opposing resultant force FR of gravity FS and centrifugal force FZ. The line of action 33 runs parallel to the bearing surface 25 of the coil carrier support 13.to the sliding surface 29 of the coil carrier shoe 14.

[0041] In the illustrated embodiment, the outwardly curved guide surface is attached to the concave outer surfaces of the guide rollers 17, but other profiles can also be used, for example convex outer surfaces in conjunction with inwardly curved guide surfaces, or V-profiles.

[0042] The spool carrier 7 has a tension measuring unit 20 for the weft thread spool 8 and a spool brake 21 arranged on the weft thread spool 8, the operation of which is analogous to the embodiment described above. Reference symbol:

[0043] Direction of movement x Centrifugal direction y Vertical direction z Sheathing 1 Long object 2 Warp thread rotation direction 3 Machine axis 4 Warp thread frame 5 Warp thread bobbins 6 Bobbin carrier 7 Weft thread bobbin 8 Warp thread 9 Braiding point 10 Weft thread 11 Laying device 12 Bobbin carrier support 13 Bobbin carrier shoe 14 Bobbin carrier drive 15 Guide surface 16 Guide rollers 17 Roller carrier plate 18 Bobbin carrier body 19 Clamping measuring unit 20 Bobbin brake 21 Deflection point 22 Radial slot 23 Vertical slot 24 Support surface 25 Bobbin carrier rotation direction 26 Bolt 27 Slotted hole 28 Sliding surface 29 Control unit 30 Roller carrier 31 Shape 32 Line of action 33 Bevel gear 34

Claims

1. Device for producing a braided sheath (1) around an elongate object (2), the device having a warp thread frame (5) which is rotatable in a warp thread rotation direction (3) about a machine axis (4) and has a group of warp thread bobbins (6), and having a group of bobbin carriers (7) which is rotatable in the opposite direction about the machine axis (4) and each have at least one weft thread bobbin (8), with at least one warp thread (9) is guidable from each warp thread bobbin (6) to a braiding point (10), and at least one weft thread (11) is guided from each weft thread bobbin (8) to the braiding point (10), and wherein during operation it being possible to shift the course of the warp thread (9) alternately above and below the weft thread (11) rotating past in the opposite direction via a laying means (12), wherein the device has a bobbin carrier support (13) rotating with the warp thread frame (5) in the warp thread rotation direction (3) during operation, wherein the bobbin carriers (7) being mounted on the bobbin carrier support (13) when the machine is at a standstill, characterized in that the bobbin carrier (7) being dimensioned so that the bearing force (FA) on the bobbin carrier support (13) becomes zero when a specified speed is exceeded and the bobbin carrier floats essentially contact-free above the bobbin carrier support.

2. Device according to claim 1, characterized in that, at the end closest to the machine axis (4), the bobbin carriers (7) have a guide surface (16) which is oriented in centrifugal direction (y) and which is mounted on a roller ring having guide rollers (17) which are arranged on a roller carrier plate (18).

3. Device according to claim 2, characterized in that the guide rollers (17) have a convex or concave outer contour.

4. Device according to any of claims 1 to 3, characterized in that the bobbin carriers (7) having a bobbin carrier shoe (14), on which a bobbin carrier drive (15) engages, and a bobbin carrier body (19), which holds the weft thread bobbin (8).

5. Device according to claim 4, characterized in that the bobbin carrier shoe (14) and the bobbin carrier body (19) are interconnected such that they can be shifted in centrifugal direction (y) and vertical direction (z).

6. Device according to any of claims 1 to 5, characterized in that the bobbin carrier (7) has a tension measuring unit (20) and a bobbin brake (21) with a control unit (30) for controlling the weft thread tension.

7. Device according to any of claims 1 to 6, characterized in that the warp thread frame (5) has a tension measuring unit for measuring a warp thread tension of a warp thread (9) and a bobbin brake for the warp thread bobbin (6) assigned to the warp thread (9), with a control unit (30) to regulate the warp thread tension.

8. Device according to either claim 6 or claim 7, characterized in that the control unit (30) has a thread breakage detection unit for detecting a thread breakage in the weft thread (11) and / or the warp thread (9).

9. Device according to any of claims 6 to 8, characterized in that power supply of the control unit (30) takes place via a sliding contact arrangement or via a device for electromagnetic induction.