DE19924430C2 - Method and device for feeding and inserting sheets of thread into the hooks of transport chains - Google Patents

Description

The invention relates to a method and an apparatus for feeding and Insert thread groups in the hooks of two spaced apart Transport chains, a thread layer using multiple thread guides in a Level aligned thread sheet in changing directions over the hooks of the Carries chains and the thread coulter before the change of direction of the Thread layer in the alleys between a first group of hooks of the Trans port chains lowered while changing direction of hook-shaped Retaining elements outside of the hook are captured and at the beginning of the return bes of the thread layer in alleys between a second group of hooks be performed.

DE 197 39 411 A1 describes a method and a device for feeding Ren of weft threads from a gate have been proposed. From threads withdrawn from the creel are pulled over from the bobbin after their withdrawal Brakes applied with a certain thread tension and on one first multiple thread guide combined into a thread family. From there they are fed to the thread layer via a thread buffer.  

The thread layer can be moved alternately over two transport chains. The trans port chains lead the cords of thread to the knitting point of a warp knitting machine where the thread coulters are fixed to one another.

The uniform thread tension of the individual threads in the thread sheet is guaranteed by different setting of the brakes on each coil. The thread buffer between the first frame-fixed multiple thread leader and the thread layer is controlled by a computer-controlled motor driven.

The program for this engine is designed so that the take-off speed the threads from the bobbins remain at approximately the same level. A no other type of programming is described.

Such a device and its procedure already have considerable Advantages over other known feeders. So can guarantee be achieved that the thread take-off speed from the creel is almost can be kept constant and that extreme speed peaks that very high thread tensions, especially when the thread is moving layers in the middle between the transport chains can.

However, the device and the method that can be implemented with it are not suitable for this suitable, the thread tension of little stretchable threads or structures between the multiple thread guide and the hook of the transport chain in the phase of Check the change of direction and during the hanging process.

If the threads to be laid are twisted or even twisted about their longitudinal axis, the threads are also elastic. By braking the individual threads thread tension between the threadle when the bobbin is drawn off ger and this brake stretches the thread. Will this stretched thread during suddenly relieved of the reversal of movement, it takes over the thread that occurs shot up by contracting.

Instead of these textile threads, fiber structures are made from parallel to each other Fibers - e.g. B. glass or carbon fibers - processed, then finds too little  elastic stretching of these fiber structures takes place. Will change direction a short thread length released by the thread layer leads to this loose threads between the hooks of the transport chains, which are usually not again can be excited. The mutual effect is also negative Unclamp the threads in the relaxed state.

The loose thread sections between the transport chains not only lead to optical irregularities in the multiaxial fabric thus prepared, she also contribute to reducing the resilience of the finished fabric at.

In the same DE 197 39 411 A1 a further embodiment variant of the controlled intermediate storage of the thread sheet described. Purpose of Intermediate storage is also the compensation of the withdrawal speed Threads from the gate. Between the multiple thread guide of the thread layer, which is located directly above the plane of movement of the transport chains, and a second, multiple thread guide located above is a controllable arranged loop-shaped thread intermediate storage.

The thread buffer is moved by a motor, which is computer controlled can work according to a specified program. This engine is on the Thread layer assembles and takes part in its movement.

Such an arrangement is unsatisfactory. The engine has no program to do that Control thread tension directly. It reduces by caching only the speed differences during a laying stroke and eliminated thus the causes for the emergence of tension peaks in the thread family. Even if you arranged this motor with its on the thread layer neten thread store another program, this could do not ensure that all threads are tensioned between the transport chains be performed.

Especially with larger working widths, the tension for the threads over the entire length of the laying without further guidance are considerable Force necessary. Would you try with the thread store shown here  and to implement a corresponding program for the motor, then you would only pull additional thread from the bobbins, but not tighten the thread that leads to the other transport chain.

To prevent this, the tension of the threads coming from the creel be pulled, keep at a very high level. Then constantly High thread tension can occur when sliding over the thread guide elements individual, endless fibers of glass or carbon between the gate and the Break weft layer. The free ends of these fibers then come loose the fiber composite and lead to malfunctions in the thread run. That is high Dimensions unsatisfactory, because such faults the highly automated Disrupt the process in a sensitive way.

DE 28 12 032 describes another device for feeding a Thread group to a weft layer via a thread buffer shown. The thread buffer, which in the area of a side wall of the Machine is arranged, has a spring-loaded, movable part of a S-shaped leading buffer.

Up to this point the threads of the thread sheet are rolled up delivered to the supplier at a rate that meets the trigger conditions is adjusted by the back and forth thread layer. Prevent a freewheel changes the thread delivery when the thread layer is moved to the thread feed side. Such a device is also unsuitable, the problem at hand to release an exact thread deposit between the transport chains.

A similar device is proposed by DE 32 34 827 A1. The Threads coming from the bobbins are fed via a braking unit controlled thread delivery gear fed. The coulter of thread thus conveyed arrives via a stationary multiple thread guide in the middle above the movement paths of the thread layer to the same. With the arrangement it is possible to Thread tension within the thread sheet during the movement of the thread layer  to master between the transport chains.

However, the mastery of thread tension is still unsatisfactory during the direction reversal of the thread layer. Many of the hooks threads in the transport chains are not sufficiently tensioned and guide to loss of strength of the finished fabric.

DE 36 31 217 C1 describes means for guiding the thread sheets in the loading a chain during the reversal of movement of the thread layer. Each thread layer can be raised and lowered in the area of every transport chain and movable offset rakes assigned parallel to the transport chains. Each offset rake has a hook-shaped one for each thread of the thread family Retaining element.

With the help of the offset movement of these offset rakes you also try the Thread tension between the hooks of the transport chain and the multiple fa the leader of the thread layer, who is close over the tips of the hooks of the Trans port chains is moved, if possible to keep them at a constant level. However, this is not possible because the one released at the start of the return stroke Thread loop remains completely uncontrolled.

One therefore only tries to guide the thread sideways so that it is independent from its occasionally different state of tension to the right hook reached the alley and does not splay over the tip of the hook. The fact that individual weft threads become loose during this process, cannot be excluded SEN. A subsequent tightening of the same is not possible here either.

DE 197 42 721 C1 proposes the hook on the trans add additional retaining hooks. These are outside the plane of movement of the conventional hooks used for guidance. The Retaining hooks are directed with their free ends outwards and downwards are regularly below the level of motion of the tops of the leaders Hook.  

The multiple thread guide is vertically movably mounted on the weft thread guide and guides the set of threads during a lowering movement on the thread layer first in the alleys between a first group of the leading hooks and then under the retaining hook. After a move relative to the move of the transport chains and after reversal of movement of the thread layer Multiple thread guides the thread family of a second group of leading hooks the transport chain and lowers it into the alleys of these hooks.

After these processes, the thread layer moves to the opposite one Transport chain and carries out this loading process in an analogous manner.

Despite many advantages, this device is not yet suitable, the voltage the thread group presented in the area between the transport chains during of the change of direction of the thread layer to be fully maintained.

The subsequent tensioning of the thread sheets during the subsequent laying process is still, although the threads slide more easily around the retaining hooks unsatisfactory.

The object of the present invention is a method and a front direction for feeding and inserting thread coulters into the hooks of two, spaced apart transport chains by means of movable thread layers propose that allows all threads and their individual fibers reliably and tightly between the hooks of the two transport chains and to keep there.

It must be ensured that the threads of structural fibers (mostly Glass or carbon fibers) during guiding from the creel to the thread not overly stressed and the bursting of individual fibers far is prevented.

This object is achieved by the method steps according to claim 1 solved in a very simple way. During the laying movement with high thread speed can be worked with the lowest thread tension.  

Also when processing structures made of glass or carbon fibers the bursting of individual fibers on the thread guide elements largely avoided. On the other hand, the tension of the thread sheet between the hooks of the Transport chains and the braking element of the thread layer even during the Sufficiently maintain the change of direction of the thread layer. The braking element pulls together with the multiple thread guide and moving tension element the thread sheet mainly from the area between the multiple thread guide and the hook of the transport chains.

The device according to claim 2 is suitable with simple technical means to implement the method according to claim 1.

The embodiment according to claim 3 combines the lowering movement of the more with the thread guide for hanging the thread coulter in the retaining hook an additional movement for tensioning the thread sheet.

The device according to claim 4 creates the basic technical requirements to implement the method according to claim 1.

The design of the braking element according to claim 5 ensures a uniform Tension of all individual threads of the thread group even with different thicknesses. The modification according to claim 6 avoids additional guide elements that should serve to tension the coulter. One can also get additional out Avoid steering the coulter as far as possible.

The combination described in claim 7 allows the drive for the vertical movement of the multiple thread guide with the necessary tension coordinate the movement of the thread group. Additional drives are over liquid.

The measure according to claim 8 creates the conditions to not pro compensate for grammable tension differences in the thread family.

The device according to claim 9 brings advantages of a constructive nature when used formation of retaining elements in the form of the known offset rakes.

The efficiency of thread tension is determined by the features of the claim 10 improved.  

The overall arrangement according to claim 11 offers the prerequisites that the Handling when pulling in the thread sheet and when lifting thread breaks can be done easily.

The invention will be explained below using a few exemplary embodiments become. Show in the accompanying drawings

Fig. 1 is a schematic overall view of the assembly chain port for supplying groups of filaments to the filament layers and the hooks of the Trans,

Fig. 2 shows a cross section through a part of the thread layer with a grid thread tensioner in the phase of the change in direction of the Fa denlegers,

FIG. 3 is a simplified view from the right FIG. 2,

Fig. 4 is a schematic representation of the functional elements of the Gitterfa denspanners analog controlled to FIG. 2, with raised and lowered unit of grid thread tensioner multiple yarn guide and clamping levers,

Fig. 5 is a Fadenlegungsbild the region of a conveyor chain with lead the hook and retaining hooks,

Fig. 6 is a view analogous to Fig. 4 with the thread layer unverschiebli chem brake element and multiple thread guide and with additional chem thread tensioner using offset rakes and

Fig. 7 is a thread laying picture in the area of a transport chain in the Ar beitsweise with offset rake.

The arrangement for placing thread groups 5 in the hooks 11 , 11 'of two laterally spaced transport chains 1 , 1 ' is shown in FIG. 1. The threads 50 for the formation of the thread sheet 5 are drawn off from bobbins 41 which are positioned in a creel 4 and guided via guide elements 42 to a multi-thread guide 43 fixed to the frame at the exit of the creel 4 .

The multiple thread guide 43 assembles the individual threads to form the thread family 5 . In the thread group 5 , the individual threads 50 are guided parallel to one another at equal distances in one plane.

To ensure a uniform thread tension of all individual threads 50 within the thread family 5 , 50 Bremsanordnun conditions can be arranged in the thread run of the individual threads. The voltage level should be determined by the least favorably positioned coils. The load on these threads is determined there only by the rope friction on the absolutely necessary guide elements 42 , 43 , 44 and 302 .

If the run-off conditions at the gate 4 are very unfavorable, a thread feed mechanism (not shown) can be arranged at the output of the gate 4, which feeds the thread whenever there is a corresponding need.

In this exemplary embodiment, the thread sheet 5 is guided over a compensating roller 44 . The position of the compensating roller 44 can be changed by the differential gear 45 . For the displacement of the compensating roller 44 , the differential gear 45 has an endless belt 453 which is stirred via guide rollers 451 , 452 and driven by a controllable motor 454 .

This differential gear 45 ensures that the thread take-off speed of the thread sheet 5 at the output of the gate 4 can be kept low and constant despite the different speed of the thread layer 2 .

The thread layer 2 is moved along guide rails 25 above the upper movement plane of the transport chains 1 , 1 'in alternating directions. The drive of the thread layer 2 takes place via the toothed belt 21 , which is guided by guide rollers 22 , 23 and driven by a motor 24 in a controlled manner.

On thread layer 2 a grid yarn tensioner 3 is guided with its carrier 30th The carrier 30 can perform a movement parallel to the transport chains 1 , 1 'by means of a drive (not shown) on the thread layer 2 (compare DE 197 42 721 C1).

At least the multiple thread guide 301 arranged at the lower end of the carrier 30 can be raised and lowered in a controlled manner, so that the thread array 53 presented above the plane of the hooks 11 , 11 'of the transport chains 1 , 1 ' into the alleys between the hooks 11 , 11 'can be introduced ( Fig. 2).

The lattice thread tensioner 3 is provided with lattice bars 31 , 32 , 33 attached to the carrier 30 . A second multiple thread guide 302 is located at the upper end of the grid thread tensioner 3 .

The fixed bars 31 , 32 , 33 touch the connecting line between the multiple thread guides 302 and 301 .

Pairs of clamping levers 34 are pivotably mounted on the carrier 30 . The clamping lever 34 lead between them the movable lattice rod 341 . The load arm 343 rigidly connected to the tensioning lever 34 has a spring 344 which is held at an adjustable fixed point 345 of the storage frame 30 . This spring 344 is suitable for pivoting the movable lattice bar 341 of the tensioning lever 34 between the fixed lattice bars 31 , 32 .

The spring 344 is to be adjusted in such a way that when the thread layer 2 moves between the transport chains 1 , 1 ', the thread sheet 51 . , , 52 is almost stretched between the multiple thread guides 302 , 301 .

Another elastic tensioning lever 35 is attached to the tensioning lever 34 . At their free end, these two clamping levers 35 jointly carry a lattice bar 351 , which is preferably easily rotatable about its longitudinal axis.

This rotatable lattice bar 351 a still has sufficient pretension when the lattice bar 341 has already reached its stable working position.

If for some reason the tension in the section 52a of the yarn sheet 52 ( FIG. 2) decreases, the grating bar 351 oscillates between the fixed bars 32 and 33 and stores the yarn sheet 52 while maintaining a certain, necessary yarn tension.

In the phase of reversal of movement of the thread layer 2 , in which by hanging the threads in the alleys of the hooks 11 , 11 'of the transport chain 1 , 1 ' and by reversing the direction, such a case occurs that temporarily certain thread sections become free. Then the tension of the thread sheet 52 is reduced in the section 52 a between the grid thread tensioner 3 and the hooks 11 , 11 'of the transport chains 1 , 1 '.

The length of the thread sheet 52 that is released is used up to a considerable extent by lifting the carrier 30 together with the grid thread tensioner 3 and the multiple thread guide 301 . For this purpose, the carrier 30 , which is slidably movable with its guide 304 on the vertical guide 201, is driven by control lever 202 .

Already the slightly looped lattice bars 331 , 332 , 341 and 351 , 33 hold the thread coulter 52 in place and pull it tight in its upward movement in section 52 a.

The control lever 202 is controlled either by a mechanical drive or by an electrically programmed motor.

If this controlled, mostly calculated lifting amount for tensioning the thread sheet 52 is not sufficient, then the lattice rod 351 falls due to its still available pretension between the lattice rods 32 and 31 and forms a loop there, which can possibly still store excess thread.

The change in the thread tension, which the lattice thread tensioner 3 generates, takes place by the adjustment of the fixed point 345 of the spring 344 .

If one wants to introduce a new yarn sheet 5 in the lattice thread tensioner 3 or remedy a thread break, the tightening lever 34 is guided as a unit in the position 34 ". The clamping lever 34 is then held securely in this position by the spring 344.

Another embodiment of the wire thread tensioner 3 is shown in FIG. 4. In this case too, the lattice thread tensioner 3 , the multiple thread guide 301 and a tensioning lever 35 are fastened to a common carrier 305 . This carrier 305 slides in the vertical direction on the guide rods 203 of the thread layer 2 by means of a guide 304 . A controllable motor 204 mounted on the thread layer 2 drives the carrier 305 via a toothed belt 205 . After the thread layer 2 with the multiple thread guide 301 has crossed the tips of the hooks 11 'of the transport chain 1 ' after a laying stroke, the multiple thread guide 301 lowers with the carrier 305 and first places the thread sheet 52 in tension in the gaps between the hooks 11 'a first group 11 a (see Fig. 5).

In its further, now delayed movement, the multiple thread guide 301 now also crosses the row of retaining hooks 12 'on the transport chain 1 ' and presses the thread sheet 52 into the alleys between these retaining hooks 12 '. By the movement of the transport chain 1 'and / or by the movement of the multiple thread guide 301 opposite to the movement of the transport chains 1 , 1 ', the retaining hooks 12 'still grasp their respective thread in a tensioned state. In this phase, the multiple thread guide 301 reaches its reversal point and begins its movement to the opposite transport port chain 1 . This movement is also superimposed on an upward lifting movement. The multiple thread guide 301 rises together with the lattice thread tensioner 3 . The thread sheet 52 above the retaining hook 12 'remains tensioned. Together with this tautly held yarn sheet 52, the thread guide 301 is moved to the next group 11 b of the leading hook 11 'of the conveyor chain 1' and performs its threads back into the lanes between these hooks.

Even if individual threads are placed directly over the tips of the hooks 11 ', the tension and division of these threads is not lost. Has the multiple thread guide 301 crossed the row of hooks 11 ', it is lowered again and thus brings the thread group 52 to the lower stop of this hook 11 b in a precisely predetermined position.

From this point in time, the threads of the thread sheet 52 can additionally tension as the speed of the thread layer 2 increases. The danger that individual threads of the thread sheet 52 interfere with one another during this tensioning process only applies in exceptional cases when two or more threads are wound around a single retaining hook 12 'at the same time.

In this way it is achieved that the thread sheet 52 is appropriately tensioned in each phase of the laying process and the tension in the mutually changing positions of the thread sheet 53 can be adjusted again.

The lattice thread tensioner is opposite the equipped in the embodiment according to Fig. 4 of FIG. 2 with an additional movable grate bar 342 which presses between the fixed grid bars 32 and 33 on the yarn sheet 52nd The additionally and separately pretensioned tensioning lever 35 guides its lattice bar 351 below the fixed lattice bar 33 . Here, this movable lattice bar 351 need only compensate for inaccuracies in the control program of the motor 204 , which is largely precisely calculated in advance. These inaccuracies are usually small in size.

Such an embodiment has the advantage of simple construction and a small deflection of the thread array 52 in the entire range of action of the bars.

In Figs. 6 and 7 a different design of the thread layer 2 ', its brake elements 27 and its clamping elements 28 is shown.

In this construction, the thread layer 2 together with its multiple thread guide 262 can only be moved in one plane via the hooks of the transport chains 1 ". Once the multiple thread guides 262 have crossed the tips of the hooks 11 ", a so-called pusher rail 29 presses the thread sheet 52 in the alleys between the hooks 11 "and in the alleys between the retaining hooks 131 of the offset rake 13th

If the position shown in FIG. 5 is reached, the offset rake 13 moves at high speed against the direction of movement of the conveyor chain 1 ″. The multiple thread guide 262 remains in its original movement plane.

Up to this point in time, the offset movement of the offset rake 13 , if it can be carried out according to any program, can essentially maintain the thread tension.

However, if the thread family 52 is thrown off during the return stroke of the thread layer 2 over the tip of the retaining hooks 131 and the hooks 11 "of the transport chains 1 ", then between the hooks 11 "of the transport chains 1 " and the multiple thread guide 262 occurs at a point in time which cannot be precisely defined thread surplus.

This excess thread can also loosen the thread sheet 53 of the previously laid position. Subsequent tensioning of this loosened thread sheet 53 is no longer possible because the many threads in the throats of the hooks 11 "obstruct one another.

According to the invention, this defect is remedied by the fact that the lattice thread tensioner 27 separates the thread sheet 51 in front of the thread layer 2 ′ on the tension side from the section 52 a of the thread sheet 52 .

The wire tensioner is formed here by the fixed bars 263 and 264 . The movable bars 273 and 274 are located on the brake lever 272 , which swings around the bearing 271 and is tensioned by the spring 275 . The fixed point 265 of the spring 275 is adjustable on the carrier 26 .

The clamping lever 282 , which is rotatably supported at 281 on the carrier 26 and leads a lattice rod 283 , is pivoted up and out by the spring 284 ge. The resulting thread loop contains only the excess thread of the thread sheet 52 from section 52 a between the hook 11 ", the retaining hook 131 and the multiple thread guide 262 .

Even with this arrangement, it is possible to put between the hooks 11 "of the trans port chains 1 " thread groups 53 , which consistently have a constant and sufficiently high thread tension.

In view of the immobility of the threads in the throats of the hooks 11 ", it is recommended, however, to slightly increase the distance between the transport chains near the knitting point of the warp knitting machine. However, a correction of the thread tension in the thread clusters 53 that is produced in this way often leads to individual capillaries of the submitted glass and / or carbon fibers are overused and burst.

For this reason, one should decide in case of doubt for the embodiment according to FIGS. 2 or 4.

In Fig. 1 an arrangement is shown which is suitable for compensating the thread tension during a laying stroke and for compensating the thread speed in this area.

Such an arrangement, but associated with considerable effort, is for the Realization of the presented invention is not absolutely necessary.

The effects from the presented invention are also achieved when the family of threads in a greater distance above the center of the range of movement of a thread layer 2 is last stationary.

In this case, the individual threads 50 running off the bobbins 41 are tensioned only by their own weight and the friction on the thread guide elements 42 , 43 and on the last thread guide, not shown, which is fixed to the frame.

This thread tension is usually so low that even with extremely changing alternating thread speeds, the loading of the individual threads or individual thread can be kept in a reasonable size.

This is an additional advantage of the method according to the invention. It consists in a significant reduction in the cost of such a compen sationsvorrichtung.

However, if you want to work with very high working speeds and / or with a significantly larger working width, then it is highly recommended to provide a controlled thread buffer according to FIG. 1 in the thread run between the creel 4 and the thread layer 2 .

LIST OF REFERENCE NUMBERS

1

.

1

'

1

"Transport chain

11

.

11

'

11

"Hook

11

a first group

11

b second group

12

.

12

'Retaining hook

13

offset rake

131

Retention hook

2

.

2

'Thread layer

20

frame

201

Guidance (vertical)

202

control lever

203

guide rod

204

engine

205

toothed belt

21

toothed belt

22

.

23

guide rollers

24

engine

25

guide rails

26

frame section

261

Multiple thread guide, above

262

Multiple thread guide, below

263

.

264

Bars, fixed

265

fixed point

27

brake unit

271

camp

272

brake lever

273

.

274

Lattice bar, movable

275

feather

28

clamping lever

281

camp

282

clamping lever

283

.

283

'Lattice bar

284

feather

29

pusher rail

3

Grid yarn tensioner

30

tensioner frame

301

Multiple thread guide (above)

302

Multiple thread guide (below)

303

guide rod

304

guide

305

carrier

31

Lattice bar, fixed

32

Lattice bar, fixed

33

Lattice bar, fixed

33

a lattice bar, rotatable

34

clamping lever

341

Lattice bar, movable, inlet side

342

Lattice bar, movable, drain side

343

loading arm

344

feather

345

fixed point

35

.

35

'' Tension lever

351

Lattice bar, fixed

351

a lattice bar, rotatable

4

gate

41

Do the washing up

42

guide elements

43

Thread guide (for thread sheet)

44

compensating roller

45

differential

451

leadership

452

leadership

453

belt

454

engine

5

yarn sheet

50

monofilament

51

Thread cluster, tapering

52

Thread group, running

52

a section of the thread sheet

52

53

Thread coulter, tensioned (between the hooks of the transport chains)

Claims (12)

1. Method for feeding and inserting thread sheets into the hooks of two spaced apart transport chains,
wherein a thread layer ( 2 ) by means of multiple thread guides guides the thread sheet ( 52 ) aligned in one plane in alternating directions over the hooks ( 11 ) of the transport chains ( 1 , 1 ') and
the thread group ( 52 )
before changing the direction of the thread layer ( 2 ) into the alleys between a first group of hooks ( 11 , 11 ') of the transport chains ( 1 , 1 ') lowered,
detected during the change of direction by hook-shaped retaining elements ( 12 , 131 ) outside the hooks ( 11 , 11 ', 11 ") and during the return stroke of the thread layer ( 2 , 2 ') in alleys between a second group of hooks (11, 11 ' 11 "),
characterized by
that the thread sheet ( 52 ) on the thread layer ( 2 ) before it enters the multiple thread guide ( 301 ; 262 ) is permanently loaded by means of a braking element ( 3 ; 27 ) and
that between the braking element ( 3 ; 27 ) and the hooks ( 11 , 11 '; 11 ") of the first group ( 11 a) located sections ( 52 a) of the thread sheet ( 52 ) during the change of direction of the thread layer ( 2 ) by means of be movable guide elements ( 3 , 351 , 283 ) can be tensioned. 2. The method according to claim 1, characterized in that the braking elements ( 3 ) for the purpose of tensioning the section ( 52 a) of the thread sheet relative to guide elements on the thread layer ( 2 ) are moved. 3. The method according to claim 1 and 2, characterized in that the braking elements ( 3 ) and the multiple thread guide ( 301 ) for the purpose of inserting the thread sheet ( 52 ) in the retaining hooks ( 12 , 12 ') and for the purpose of tensioning the section ( 52 a) the thread sheet ( 52 ) are moved together vertically relative to the thread layer ( 2 ). 4. Device for inserting thread coulters into the hooks of two spaced apart transport chains
from a thread layer ( 2 ) with a multiple thread guide which is guided and moved in alternating directions over the hooks ( 11 ) of the transport chains ( 1 , 1 '),
from hook-shaped restraint means ( 12 , 131 ) which, at least in the range of movement of the thread layer ( 2 ), capture the thread sheet ( 52 ) outside the path of movement of the hooks and below the movement range of the thread layer,
from means ( 301 , 29 ) for lowering the thread sheet ( 52 ) into the alleys of a first group ( 11 a) of hooks and
from braking elements for tensioning the supplied thread sheet for carrying out the method according to claim 1,
characterized,
that the braking elements ( 3 , 27 ) are arranged on the thread layer ( 2 ) and
that the braking elements (3, 27), the multiple yarn guide (301, 262) and at least one movable guide element (3; 35; 283) for the portion (52 a) of the yarn sheet (52) are formed spanner as a thread. 5. The device according to claim 4, characterized in that the braking elements are designed as spring-loaded wire tensioners ( 34 , 35 , 27 ). 6. The device according to claim 4 and 5, characterized in that the wire tensioner ( 3 , 34 , 35 ) on the thread layer ( 2 ) is guided vertically movable bar. 7. Device according to one of claims 1 to 6, characterized in that
that the grid thread tensioner ( 3 , 34 , 35 ) and the multiple thread guide ( 301 ) are attached to a common support ( 30 , 305 ) and
that the carrier ( 30 , 305 ) on the thread layer ( 2 ) is guided to be vertically movable and can be driven by means of a controlled motor ( 204 ). 8. The device according to claim 4 to 7, characterized in that the lattice thread tensioner ( 34 , 35 , 27 ) or part thereof is equipped with independently movable lattice bars ( 341 , 342 , 351 , 273 , 274 , 383 ), their pretension and Working stroke are different from each other. 9. The device according to claim 4 and 8, characterized in that
that the lattice thread tensioner ( 27 ) is arranged vertically immovably on the thread layer ( 2 ) and
that a movable, spring-loaded thread tensioner ( 28 ) with at least one grid bar ( 283 ) is provided between the grid thread tensioner ( 27 ) and the multiple thread guide ( 301 ). 10. The device according to claim 8 or 9, characterized in that the lattice bars ( 33 a, 351 a) of the lattice thread tensioner ( 3 ) on the side facing the multiple thread guide ( 301 ) are easily rotatably supported about their longitudinal axis. 11. The device according to claim 4, characterized in
that the movable tensioning lever ( 34 ) of the wire thread tensioner ( 3 ) is assigned a loading arm ( 343 ) for the engagement of a spring ( 344 ),
that the tensioning lever ( 34 ) can be swung out for the purpose of unimpeded manipulation of the thread group ( 5 , 51 , 52 ) and
that during this pivoting movement of the loading arm ( 343 ) over the extended connecting line between the fixed fixed point ( 345 ) of the spring ( 344 ) and the pivot axis of the storage lever ( 34 ) be movable. 12. The device according to one of claims 4 to 10, characterized, that the bars are freely rotatable on their holder and that the bars together or separately controlled brake elements assigned.