EP2388362A1 - Tensioning device and method for retensioning warp filaments of a warp filament layer - Google Patents

Abstract

The clamping device (S) has two supporting elements (S-10,S-20), where a space between the supporting elements is changeable by a connected adjustment mechanism (S-30). The adjustment mechanism is connected with guide elements (S-11, S-11',S-21), over which the supporting elements are releasably connected with a common guide rail (FS). A clamping unit (S-40) is movable along the guide rail using the adjustment mechanism. Independent claims are also included for the following: (1) an assembly of a clamping device and a clamping frame for mounting a warp-thread layer; (2) a retraction device for warp threads of a warp-thread layer in elements of a weaving harnesses; and (3) a method for tightening of warp threads of a warp-thread layer by using a clamping device.

Description

The invention relates to the field of weaving technique and in particular a tensioning device for tensioning warp threads of a warp thread layer according to claim 1, a combination of this tensioning device and a clamping frame according to claim 9, a retraction device according to claim 12 comprising the tensioning device, and a method for tensioning warp threads of a Warp thread layer according to claim 13.

Before a fabric or fabric is produced on a weaving machine by the combination of warp threads and weft threads, the warp threads, following a certain order, must be drawn into a weaving harness. The elements of the harness usually include healds, healds, Kettfadenwächterlamellen and the reed. Retraction means to pass each individual warp thread, which is normally wound on a warp beam in the required length, respectively into the thread eye of a warp stop guard, a heald and a gap between two teeth of the reed, so that the end of the drawn warp thread subsequently protrudes from the reed , The fabric pattern is given by the heald is assigned to a particular heald or is introduced into such.

Since warp threads are usually wound up to several thousand over a certain width in parallel on a warp beam, this process must be repeated just as often until a warp is completely pulled into a harness. This has been and still is However, there are also machines available in various designs that either automatically carry out some of the operations (semi-automatic drawing-in machines) or the entire process (automatic drawing-in machines).

Although semi-automatic drawing-in machines are relatively inexpensive, compared to automatic drawing-in machines, they have the great disadvantage that an operator is 100% employed on the machine and carries out the pulling-in process partly manually. In this way, only a small increase in productivity can be achieved compared to manual feeding, and the error rate is relatively high.

Automatic drawing-in machines are known and available on the market in various embodiments. They have an automatic control system for all operations necessary for pulling warp threads into a harness. The tasks of the operating personnel are limited to the preparation and monitoring of the sequence and the functions as well as the supply and removal of the starting material. As a result, productivity can be increased many times over manual feeding and the error rate can be greatly reduced.

Automatic feeding machines basically consist of two main units that can be moved against each other. The one unit contains the warp preparation apparatus (warp thread layer mounting unit), and the other unit includes the apparatus for drawing and receiving the weaving unit (draw-in unit). Retractable unit and clamping unit move during feeding relative to each other sideways from the beginning to the end of the warp thread according to the Einzugsestschritts.

The embodiment of automatic drawing-in machines described above always includes a clamping device (thread or tension frame) on which the warp thread layer to be processed is to be applied. From this warp layer, the warp threads are individually picked up (separated) in sequential order and pulled from the Einzieheinheit in the Web harness elements. A faultless separation of the individual warp threads requires that the warp threads are stretched with a certain bias on the thread frame. This tension varies depending on the material and the quality of the yarn. Substantial forces add up to a whole warp width, which change as the drawing process progresses. This may require intervention by the operator by adjusting the preload. To circumvent these problems, solutions exist according to WO 02/101132 in which only a small part, namely the part of the warp threads located directly in front of the separating point is tensioned (partial tensioning). This reduces the forces on the thread frame as a whole. However, these solutions have the disadvantage that the partial tension must be solved with each shift of the thread frame relative to Einzieheinheit and must be re-tensioned after the shift. The required interaction of the individual components usually requires motion sequences and drives, which are only complex and cost-intensive feasible, and yet have to work correctly and accurately.

Another problem is the fact that it is the two mutually displaceable main units to heavy and correspondingly sluggish body whose weight is also dependent on the particular application. However, since the retraction position to the position of the warp to be separated in the course of the Einziehprozesses changes continuously, a periodic displacement of at least one of the two main units is mandatory. To alleviate this problem, for example, a solution according WO 92/07127 By dividing the units to be moved into a lighter and a heavier part, the lighter part is moved with greater precision regardless of the heavier part.

Other solutions for the relative displacement of draw-in unit to clamping unit are, for example, in CH 479735 described. Such solutions require high precision in the placement of Einzieheinheit and Aufspanneinheit by these are positioned, for example, on rails or flat steel plates, which is correspondingly expensive and has little flexibility in changing the flow of material.

It is an object of the present invention to overcome the disadvantages mentioned and to allow an improved re-tensioning of warp threads of a warp thread layer, which is mechanically simple to accomplish, reliable and accurate, flexibly applicable and inexpensive to operate.

This object is achieved by the clamping device according to claim 1.

An essential point of the clamping device according to the invention consists first of all in that it can automatically move along the guide rail alone under coordinated actuation of the adjusting mechanism and of the locking elements. The adjustment mechanism has to include only a single drive, which contributes to a significant weight reduction. Both the autonomous mobility and the reduced weight contribute to the device being particularly flexible. Since the reliability and accuracy of the device is also determined by the guide rail, only low demands are placed on the soil condition of the site. In particular, the cost is reduced by no longer requiring a rail system or steel plates.

Advantageous embodiments of the inventive clamping device are specified in the dependent claims 2 to 8.

In a preferred embodiment, the tensioning unit comprises three bar elements approximately aligned parallel to each other, of which a first and a second bar element form respective stops for at least one warp thread, and a third bar element for gripping and tensioning the warp thread is movable between the first and second bar elements , With such a clamping unit can be generated in principle any desired post-tension. To move the clamping unit, the third bar member is moved back to its position remote from the other two bar members to receive another portion of the warp thread layer in the space therebetween. To this other part in this room too To guide and avoid any blockages between the clamping unit and warp layer, while a respective free end of at least one of the rod elements preferably runs pointed. The third rod element is preferably movable via an eccentric mechanism in order to ensure the simplest and at the same time space-saving drive over a wide adjustment path.

In a further preferred embodiment, the locking elements on a clamping or locking mechanism, which allows a particularly simple, fast and secure determination of the support elements on a guide rail. Such a mechanism may e.g. be realized by electric motor or electromagnetically actuated actuators. The adjustment mechanism for the distance between the support elements, however, preferably includes a spindle drive, which is particularly simple and space-saving feasible and also allows a sufficiently accurate positioning of the clamping unit.

A particularly flexible use of the tensioning device is ensured when the support elements are mounted on a mobile chassis. Such a device can in particular be operated on a plurality of clamping frames, so that a locally installed clamping device does not have to be present for each clamping frame. Preferably, one of the two support elements is fixedly connected to the mobile chassis, so that this moves with the support element, and a correspondingly short chassis sufficient to support the support elements.

The above object is also achieved by a combination of the above clamping device and a clamping frame according to claim 9.

An essential point of the inventive combination consists in the fact that the guide rail is always aligned exactly to the clamping frame, as is required for tensioning the warp threads.

Preferred embodiments of the inventive combination are given in the subclaims 10 and 11.

Thereafter, it is preferred that the guide rail is formed as a part of the clamping frame, since only a portion of the warp threads is stretched, and only small demands on the power consumption of the clamping frame must be made. Since the clamping frame is lighter overall, it can also be mounted movably relative to the clamping device. This allows it to be moved with respect to the clamping unit when it is self-locked, which allows for an overall continuous movement of the clamping unit along the frame, which shortens the processing time of a warp thread layer.

The above object is also achieved by a warp thread retraction threading apparatus as claimed in claim 12, which comprises the above jig.

An essential point of the inventive retraction device is that it uses all the advantages of the clamping unit according to the invention at the same time for separating and drawing in the warp threads. So the retractor can in particular also build on the movable chassis of the clamping device, at the clamping unit in the simplest case nor the separating and Einzieheinheit are held and moved with this.

An advantageous development of the inventive retraction device is specified in the dependent claim 13.

The separating unit and / or the draw-in unit are preferably mounted on the support element which does not carry the tensioning unit. As a result, in particular a continuous further processing of the warp threads can be ensured if the clamping unit is not moved. This is the case when the support member is locked and the other support element - with the separator mounted thereon and Einzieheinheit - is tightened to again to create latitude for moving the clamping unit.

The above object is also achieved by a method for tensioning warp yarns of a warp thread layer according to claim 14, which utilizes the above tensioning device.

An essential point of the inventive method consists in that by mutual locking of the support elements and subsequent operation of the adjustment of the clamping unit whose particularly simple movement along the warp thread layer is possible, which no longer requires complex drives and complex kinematics. This particularly increases the reliability and accuracy of the method.

Advantageous developments of the inventive method are given in the subclaims 15 and 16.

In a preferred development of the method, the warp thread layer is moved relative to the tensioning unit when its support element is fixed, so that a total continuous movement of the tensioning unit results along the warp thread layer. Thus, a retightening of further warp threads is possible even with locked clamping unit, so that there is an overall shortened processing time of the warp thread layer.

In a further preferred development of the method, furthermore, a separating unit and a draw-in unit of a movement of the clamping unit are subsequently moved along the warp thread layer, and a respectively separated warp thread is drawn into elements of a woven harness. The advantages of the inventive Nachspannvorgangs thus be used for the separation and drawing of warp threads in the same process.

Figur 1

eine Prinzipdarstellung einer erfindungsgemässen Spanneinheit an einem Spannrahmen;

Figur 2

eine konkrete Ausführungsform der Kombination aus Einzieheinheit und Spannrahmen gemäss Figur 1;

Figur 3

eine Spannvorrichtung an der Führungsschiene des Spannrahmens gemäss Figur 2;

Figur 4

eine Vorderansicht der Spannvorrichtung an der Führungsschiene gemäss Figur 3, und

Figur 5

eine Seitenansicht der Spannvorrichtung an der Führungsschiene gemäss Figur 3.

The invention is explained below with reference to a schematic diagram and a specific embodiment with reference to the accompanying figures in detail. The same or functionally identical components are provided with the same reference numerals. Show it:

FIG. 1

a schematic diagram of an inventive clamping unit on a clamping frame;

FIG. 2

a concrete embodiment of the combination of Einzieheinheit and tenter according to FIG. 1 ;

FIG. 3

a clamping device on the guide rail of the clamping frame according to FIG. 2 ;

FIG. 4

a front view of the clamping device on the guide rail according FIG. 3 , and

FIG. 5

a side view of the clamping device on the guide rail according FIG. 3 ,

The FIG. 1 shows a schematic diagram of an inventive clamping device S on a clamping frame R. The clamping device comprises a first support member S-10, which is movable over two guide elements S-11 and S-11 'along a guide rail FS. This first support element S-10 is designed here in the form of a support frame, in the area of which an adjustment mechanism S-30 for moving a tensioning unit S-40 is held. The adjustment mechanism S-30 may, as shown here, for example, comprise a spindle drive, via which the clamping unit S-40 in the surface of the support frame is movable back and forth. Of course, the choice of another suitable drive is conceivable, such as a rack or belt drive or alternative drives, which are known to the person skilled in the art, depending on the power and cost. The clamping unit S-40 is firmly connected to a second support element S-20, which is also on a guide element S-21 movable on the guide rail FS. For better understanding, the support frame-shaped first support element S-10 is shown interrupted at the point at which it is crossed by the second rod-shaped support element S-20. However, the support frame should be closed in this embodiment. This can be the whole Move tensioning device S along the tensioning frame R in order to re-tension at this tensioned warp thread KF of a warp thread layer KFS. For individual locking of the first or second support element S-10 or S-20 on the guide rail FS, respective locking elements S-12 and S-22 are provided. The locking element S-12 can optionally also be integrated into one of the guide elements S-11 or S-11 'of the first support element S-10 or arranged in front or behind it, as here with the locking element S-22 and the guide element S-21 of the second support member S-20 is the case. The locking elements S-12 and S-22 should be designed here as electromagnetically activated terminals.

Also, the clamping frame R itself can - but need not necessarily - be movably mounted relative to the clamping device S. For this purpose, it can guide elements R-10 and R-10 ', which allow its movement along the guide rail FS. The possibilities of movement of the clamping device S, the clamping unit S-40 and the clamping frame R are indicated by the individual double arrows.

If the warp thread layer to be tensioned is clamped on the frame R and the tensioning device S is connected to the guide rail FS, the tensioning process can begin. At first the terminal S-22 closes and the terminal S-12 is open. The clamping unit S-40 is activated and a portion of the warp thread layer KFS is re-tensioned. The tensioned warp threads KF could then be separated, for example by appropriate processing units and fed into elements of a harness. For processing further warp threads, the support element S-10 by means of adjusting mechanism S-30 as long along the warp thread layer KFS moves until the re-tensioned portion of the warp thread layer KFS has been processed. Then terminal S-22 opens and terminal S-12 closes. The adjusting mechanism S-30 then advances the support member S-20 along the warp thread layer KFS until the tension unit S-40 covers another portion of the warp thread layer KFS. This is followed by terminal S-22 and terminal S-12 opening, the tensioning unit S-40 being activated, and another portion of the warp thread layer KFS being re-tensioned, the support element S-10 being movable. Because during this time the support element S-10 is stationary relative to the clamping frame R, it can be moved counter to the clamping device S in order to ensure continuous processing of non-tensioned warp threads even in the step of "drawing" of the support element S-10. The reciprocal method of the support elements S-10 and S-20 can be continued until all warp threads KF of the warp thread layer KFS were re-tensioned or separated and retracted.

Due to the fact that the tensioning device S according to the invention can be moved on the guide rail FS, only low demands are placed on the ground conditions at the location where the device S is used. In particular, no rail system and no steel plates to support the individual components longer required. The tensioning device S also requires only a single drive system, to which moreover only small demands on the precision for the displacement of the components must be made. Overall, this means that apply comparatively low cost of the tensioning device and a puller based thereon are, and cost savings in the preparation of mounting the device on site are possible. In addition, a virtually interruption-free clamping or retraction process is possible by the advance of the support member S-10 can also be done during a separation of the warp threads. At the same time, the inventive clamping device is very light and therefore extremely flexible. By the proposed clamping process, only small demands are placed on the power consumption of the clamping frame R, since only a part of the warp threads is always stretched.

The FIG. 2 shows a concrete embodiment of the combination of retractor E and clamping frame R according FIG. 1 , The retraction device E is based on an inventive clamping device S, which also has a mobile chassis S-50, and further comprises a separating unit E-10 and a Einzieheinheit E-20 for warp threads in elements of a harness. For positioning a tensioning unit S-40 on the warp thread layer KFS, a first and a second support element S-10 and S-20 are hung on a guide rail FS. The guide elements S-11 and S-11 'give the retraction device E both stability and directional stability.

The clamping frame R is arranged stationary, while the retractor E is displaceable thereto. In principle, however, the reverse arrangement is possible in which along a fixed Einzieheinheit E a clamping frame R is moved past. The width of the frame R corresponds to at least the widest Kettfadenschicht KFS to be processed. The frame R has means, the thread layer with the necessary for processing To provide tension. The frame R is rigidly connected at the bottom with the guide rail FS.

At the beginning of the collection process, the warp to be recovered is brought to the clamping frame R and the warp thread layer KFS clamped on this. When using a reed this is clamped in the designated holder. The retractor E is then positioned at the beginning of the warp yarn layer KFS and prepared for feeding by the required according to Einzugsrapport number of Webschäften or Litzentragschienen and Lamellentragschienen is inserted into the designated holder, the magazines are filled for strand stack and fin stack, and the Input report is entered or programmed. With triggering of the start then the Einziehprozess, wherein the retraction of the warp threads takes place in known manner in strands, fins and the reed to the last according to Einzugsrapport programmed warp KF. The strands and lamellae with warp threads drawn in are distributed on the support rails provided for this according to the pull-in repeat. The last in the leaf gaps of the reed entangled warp KF project forward from the reed out.

For advancing the retractor E along the guide rail FS, the support members S-10 and S-20 have respective terminals S-12 and S-22 (shown in detail and designated in FIG FIG. 3 ) on. While one clamp S-12 is fixedly connected to the retractor E, the clamp S-22 is slidable sideways with respect to the retractor E, here by means of an adjustment mechanism S-30 comprising a spindle drive S-31 (also shown and denoted in detail) in FIG. 3 ). Firm with the clamp S-22 connected to the tensioning unit S-40 for tensioning the thread layer KFS on a part of the same width (partial clamping).

In a starting position, when the retractor E is positioned on the frame R and the separating unit E-10 is ready to engage a warp, the clamp S-22 now closes while the clamp S-12 is open. The tensioning unit S-40 is activated, so that warp threads KF are provided over a portion of the Kettfadenschicht KFS with the necessary for error-free separation voltage. The drawing in of the warp threads KF begins by the separating unit E-10 detecting the respective nearest warp thread KF and the drawing unit E-20 pulling it into elements of a woven harness (not shown). During this process, the draw-in unit E-20 moves in each case so far in the direction of the thread layer KFS that the separating unit E-10 can grasp the warp thread KF to be separated next. This forward movement is triggered by the spindle drive S-31.

If all the warp threads in the section of the warp thread layer which is stretched by the tensioning unit S-40 are pulled in, clamp S-12 closes and the clamp S-22 opens. The spindle drive S-31 then moves the clamp S-22 so far in the direction of the warp thread layer KFS that a portion of the layer KFS can again be detected by the tensioning unit S-40. Then the terminal S-22 closes and the terminal S-12 opens, and the clamping unit S-40 is activated. This process is repeated until the last warp thread KF of the warp to be processed is retracted.

In sum, therefore, the retractor E and the tensioning frame R move laterally from the beginning to the end of the warp thread layer KFS during drawing in accordance with the drawing-in progress. When the end of the warp yarn layer KFS is reached and the last warp yarn KF is pulled in, the elements of the woven harness are released from the pull-in device E and the tenter frame R, so that the pull-in device and the tenter frame R become independent of each other. To remove the reed, the healds or heald bars with the strands and the slat support rails with lamellae including the warp are removed from the Einzieheinheit and Aufspanneinheit. Clamping frame R and retractor E are thus free again for a next Einziehprozess or its preparation and can also be spatially separated.

In principle, the functional units of the retraction device E are not limited to a division into tensioning, separating and retraction units. It may also be a possible division into separating, cutting and Einzieheinheit for feeding warp threads KF provided in the thread eyes of strands, warp stop guard slats and gaps in the reed. Further units can also be the inclusion of heald bars or healds, the storage, separation and distribution of healds on heald bars, the drawing of warp threads KF in a reed, the storage, separation and distribution of Kettfadenachterachterlamellen on disk carriers and the programming, operation and control of the system affect.

The FIG. 3 shows a clamping device S on the guide rail FS of the clamping frame R according FIG. 2 , Out For reasons of clarity, the chassis S-50 is omitted, so that the support elements S-10 and S-20 can be clearly seen, which are interconnected via an adjustment mechanism S-30, which includes a spindle drive S-31. With this adjustment mechanism S-30 a distance between the two support elements S-10 and S-20 is changeable. The support elements S-10 and S-20 have guide elements S-11 and S-21, which can be hung on the guide rail FS, so that the tensioning device S can be moved along the rail. The support elements S-10 and S-20 are equipped with respective terminals S-12 and S-22, which are for example electromechanically actuated, so that with mutual locking of the terminals S-12, S-22 and the corresponding actuation of the adjustment mechanism S- 30 a stepwise movement of the tensioning device S on the rail FS is possible. The spindle drive S-31 is held on the first support member S-10 and a tension unit S-40 on the second support member S-20. The clamping unit S-40 is initially movable over a path, which is predetermined by the adjusting mechanism S-30. To do this, terminal S-12 is closed and terminal S-22 is open. Further movement of the S-40 clamping unit beyond this travel is possible by closing clamp S-22 and opening clamp S-12, as a result of which the distance between support elements S-10 and S-20 is controlled by adjusting mechanism S-30 again enlarged, the first support member S-10, so to speak, is removed from the second support member S-20. Once this is done, in turn, the clamp S-12 is closed and the clamp S-22 is opened, so that the locked support member S-10 can serve as an abutment for a repeated forward movement of the clamping unit S-40. For tensioning the warp threads KF these are between two rod elements S-41 and S-41 'of the clamping unit on the one hand and a third rod member S-42 added, which is pivotable through the gap between the two rod elements S-41 and S-41'. The latter bar elements thereby form a stop for the at least one thread KF gripped by the third bar element S-42. The thus tensioned threads KF can thus be easily separated and subsequently retracted into elements of a woven harness.

The FIG. 4 shows a front view of the clamping device S on the guide rail FS according FIG. 3 , In this view, in particular, the adjusting mechanism S-30 can be clearly seen, which can move the clamping unit S-40 in the direction indicated by the double arrow directions when the terminal S-12 is closed. Conversely, the spindle drive S-31 is moved further when the adjustment mechanism S-30 is actuated with closed terminal S-22 and open terminal S-12. Thus, a stepwise movement of the clamping unit S-40 on a Kettfadenschicht KFS is possible. Continuous further processing can be carried out if, during the time in which the clamping unit S-40 is retightened, the clamping frame R is moved counter to the supporting element S-10, so that the separating unit E-10 can continuously separate warp threads KF. For securely detecting the warp threads KF, the two rod elements S-41 and S-41 'of the tensioning unit S-40 have tapered free ends, while the third rod element is formed roller-shaped to avoid damage to the threads KF. The particularly easy to see in the side view compact and lightweight construction of the clamping device S makes them particularly flexible and creates constructive leeway for further functional units for building a retraction device. Equipped with the tensioning device S according to the invention, the pulling-in device E permits a particularly reliable separation and thus the drawing in of warp threads KF.

The FIG. 5 finally shows a side view of a possible embodiment of the clamping device S on the guide rail FS according to FIG. 3 , In addition to the components already described here is clearly seen how the third rod member S-42 is pivoted against a warp KF. For this purpose, an eccentric mechanism S-43 is provided, which takes on the one hand little space and on the other hand allows easy adjustment over a long way away. In the side view of the clamping device S also the locking element S-12 can be seen, which (as the underlying and thus not visible locking element S-22) provides a recess in the support element S-10 and S-20, by terminals S-12 and S-22 can be closed against the guide rail FS running therein.

The inventive tensioning device S can thus be used both as an independent unit, but also provides a highly functional basis for building a retraction device with other functional components. Their simple construction makes them particularly reliable, flexible and cost-effective in terms of both their manufacture and maintenance. These advantages are also inherent in a drawing machine incorporating such a jig and significantly increase the threading quality and speed.

Claims (16)

Tensioning device (S) for warp threads (KF) of a warp thread layer (KFS), with two support elements (S-10, S-20) whose distance from one another is variable via an adjusting mechanism (S-30) connecting them, and which are provided with guide elements (S -11, S-11-, S-21) are connected, via which the support elements (S-10, S-20) with a common guide rail (FS) are detachably connectable and movable along this, wherein one of the support elements (S 20) carries a tensioning unit (S-40) for tensioning at least one warp thread (KF), and the support elements (S-10, S-20) with locking elements (S-12, S-22) for mutually fixing the support elements (S-10). S-10, S-20) are provided on the guide rail (FS), so that the tensioning unit (S-40) is movable along the guide rail (FS) with the aid of the adjusting mechanism (S-30). Device (S) according to claim 1, in which the tensioning unit (S-40) has three approximately parallel aligned rod elements (S-41, S-41 ', S-42), of which a first and a second rod element (S-42) 41, S-41 ') form respective stops for at least one warp thread (KF), and a third bar element (S-42) for gripping and tensioning the warp thread (KF) between the first and second bar elements (S-41, S-41 ') is movable therethrough. Device (S) according to claim 2, in which a respective free end of at least one of the bar elements (S-41, S-41 ', S-42) tapers. Device (S) according to claim 2 or 3, wherein the third rod element (S-42) is movable via an eccentric mechanism (S-43). Device (S) according to one of the preceding claims, in which the locking elements (S-12, S-22) have a clamping or latching mechanism. Device (S) according to one of the preceding claims, in which the adjusting mechanism (S-30) comprises a spindle drive (S-31). Device (S) according to one of the preceding claims, in which the support elements (S-10, S-20) are mounted on a mobile chassis (S-50). The device (S) according to claim 7, wherein one of the two support members (S-10, S-20) is fixedly connected to the mobile chassis (S-50). Combination of a tensioning device (S) according to one of the preceding claims and a tensioning frame (R) for mounting a warp thread layer (KFS), in which the guide rail (FS) of the tensioning device (S) is connected to the tensioning frame (R). Combination according to claim 9, wherein the guide rail (FS) is formed as a part of the clamping frame (R). Combination according to Claim 9 or 10, in which the clamping frame (R) is movably mounted relative to the clamping device (S). Threading device (E) for warp threads (KF) of a warp layer (KFS) in elements of a woven harness, comprising a tensioning device (S) according to one of claims 1 to 8, and a separating unit (E-10) for gripping and separating tensioned warp threads (KF ), and a draw-in unit (E-20) for drawing the separated warp threads (KF) into elements of a weaving harness, wherein the separating unit (E-10) and the draw-in unit (E-20) subsequently move a movement of the tightening unit (S-40) are formed. The retracting device (E) according to claim 12, wherein the separating unit (E-10) and / or the drawing-in unit (E-20) are mounted on the supporting member (S-10) which does not support the tightening unit (S-40). Method for tensioning warp threads (KF) of a warp layer (KFS) with a tensioning device (S) according to one of Claims 1 to 8, in which the tensioning unit (S-40) is positioned on the warp thread layer (KFS) and the support elements (10, 20 ) are mutually determined on the guide rail (FS), wherein after each change, a distance between the support elements (S-10, S-20) is changed such that the clamping unit (S-40) along the warp thread layer (KFS) moves and a Retensioning successive warp threads (KF) can be performed. A method according to claim 14, wherein the warp thread layer (KFS) is moved with respect to the tensioning device (S) when its support elements (S-10, S-10 ') are fixed, so that it is entirely continuous Movement of the tensioning device (S) along the warp layer (KFS) results. The method of claim 14 or 15, wherein a separating unit (E-10) and a Einziehheinheit (E-20) movement of the clamping unit (S-40) is subsequently moved along the Kettfadenschicht (KFS), and a respective separated warp thread (KF ) is drawn into elements of a woven harness.

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