EP1607501A1 - Method and device for shedding jacquard patterned pile warp yarns in a face to face weaving machine - Google Patents

Abstract

In a process to weave pile textile the strands (31, 32) are introduced to the shed by powered inserts in a programmed sequence varied as required. The pile threads (31, 32) variable stroke is determined in accordance with the most recent fixing point in one of the two foundation layers. The shed height in the vicinity of the rearmost web-blade (2) position, is at the maximum point set by the pile threads. The end position and/or the pile thread feed point in the vicinity of the middle shed (M1, M2) is such that there are not more than two regular pile threads to each reed gap, simultaneously in one plane or in opposition. Also claimed is a commensurate weaving assembly.

Description

The invention relates to a method and a device for shedding jacquard mustard pile warp threads on a double pile loom with at least two superposed weft insertion zones between each adjacent compartment levels, the pile threads on strands - the Pattern and the selected binding accordingly - each one level assigned and finally after the open subject working in this subject level be moved, the group of non-eye pile threads in an upper and / or lower basic commodity and the mustering Pole threads alternately in the upper base fabric and in the lower base fabric involved and spanned between the two basic goods become.

On double looms or looms with more than one Weft insertion zone, it is common for those participating in the shedding Warp threads in shed levels above, below or between Splitting weft insertion zones according to the desired binding. The pile warp threads of each individual level are using shedding devices selected individually or in groups and then in the given one moved to new level. The pile warp threads affect the Weft insertion zones at a greater or lesser distance from the Trajectory of the weft insertion elements.

For pile threads, one aims for the largest possible opening angles, while the Binding warp threads and the tension warp threads the path of the weft insertion elements - or the weft insertion zone - very tangent and lead the same.

All pile warp threads are made for the purpose of shedding through eyelets on strands guided, which follow a patternful drive. Will a strand of a assigned to a specific level, their hub always ends in one and the same Position. This position is determined by the preset position and the stroke of the Knife boxes or finger rakes of the Jacquard machine intended.

From DE 199 24 689 C1 a device has become known with the help which limits the shed opening angle in the area of the inguinal warp threads, being held. These compartment limiters act on the two outer ones Ffachbenen and limit their opening angle such that a means Nozzles registered, not yet struck thread end during the Weft insertion is held sufficiently secure in it.

U. a. EP 1 069 218 B1 discloses a device for shedding of warp threads on looms with a single weft insertion zone for each warp has a separate shingles drive. The actuators described for this purpose exist from a motor whose drive wheel is connected to a cord (harness) is. The stroke size can vary depending on the distance of the respective strand from the weft stop edge to secure the required bin opening angle be varied.

In US 6 293 315 B1 a similar device is described in which the drive wheel of the engine is designed as part of a pulley.

These latter documents - DE 199 24 689 C1, EP 1 069 218 B1 and US 6 293 315 B1 - are exclusively concerned with weaving machines which have only a single weft insertion zone and only two shed levels. The fabric made on these machines is a flat fabric. The Height of the shed is relatively low on these machines.

On weaving machines with two or more weft insertion zones increases the entire compartment height clearly. A use of individual actuators for the specialization of pile threads on double pile looms not possible. The mostly very voluminous and in a very small space led Pole threads cling to each other and allow a reduction of the opening angle not too.

With the required large shed opening angles, the energy requirement increases for the individual actuators and thus their heating. In the necessarily tight packing of the actuators the problem of cooling is of particular importance. An economic Operation is not given.

To reduce the height of the shed to Doppelflorwebmaschinen has for reasons of performance increase in DE 32 05 227 A1 proposed to guide the batten on a parallelogram. By This design can be seen in particular the height of the batten and its Clearly limit the way. You can do the strands leading the pile threads like this lead closer to the weft insertion zone. The stroke of the strands is reduced. However, the bin opening angle remains constant.

The use of single rotating actuators, the harness cords Winding on a roll is the same even when using it guided batten still not possible.

The object of the present invention is the formation of the shed to modify so that, if necessary, using individual actuators For the control of the pile threads reduces the specialist height of the pile threads can be, without this at constant warp density in the shedding cling to each other.

According to the invention this object is achieved by the method according to claim 1.
With the modification of the shed according to the invention it is achieved that the differences of the specialist dimensions are compensated by the different integration positions on the different basic goods, that the pile threads, when they set as Totpol or as beginning with the patterning Polfaden, perform a smaller stroke in the outer compartment.
With this new type of shed formation, the advantages of the individually controlled actuators can also be transferred to double pile looms, on which voluminous pile threads are integrated in high density and which has more than one weft insertion plane.

Another advantage of the invention is that in this way reduced shed the use of a clear in their size and in its mass reduced batten allows. This leads to an increase the speed of the loom. Also attached to the batten, in the Shed protruding elements - such as guide teeth for the weft insertion member, Auxiliary nozzles with Airjet weft insertion - can be shorter and thus be made lighter and more stable.

With the staggering of the pile threads in their end positions according to claim 2 let Even at reduced dimensions the pile threads during the Specialist without clinging to solve each other.

The claim 3 specifies the claim 1 with respect to the way how one - by the different strokes into the outer compartment - the specialist height of the Can reduce pile threads.

The graduation of the end positions of the strands also in the outer compartments - after Claim 4 - reduces the clip effects also in these areas. The latter has especially meaning when the newly mustering pile threads in the External compartment can be released from the respective Totpolstrang.

With the modification of the technical representation according to claim 5 can clinging Loose pile threads with greater reliability from each other, without that To permanently increase the shed in the area of movement of the sley.

The method defined in claim 6 effectively avoids a temporary Jam of pile threads in the area of the middle compartment and thus bows a stapling of the pile threads effectively before.

The claim 7 shows a modified method for solving the problem on. Instead of the differentiated positioning of the pile threads in the outer compartments depending on the last bond in one of the basic goods Here a mechanical Fachbegrenzer used, which the movement scope those pile warp threads in the area of the batten in their specialist height Limited, from their own basic commodity to the adjacent outer compartment switch.

The device described in claim 8 is used in a simple way Realization of claim 1. The modification according to claim 9 supported the loosening of the warp threads from each other.

The device for carrying out the method defined in claim 7 Claim 10. Claim 11 shows an advantageous design and arrangement the shed limit for the execution of the method according to Claim 7.

Fig. 1

einen schematischen Querschnitt durch das Webfach einer Doppelflorwebmaschine,

Fig. 2

ein Bewegungsschaubild für einen Polfaden der Oberware,

Fig. 3

ein Bewegungsschaubild für einen Polfaden der Unterware,

Fig. 4

eine Darstellung eines Doppelflorgewebes mit dem Verlauf der Polfäden beim Polfadenwechsel,

Fig. 5

einen schematischen Fachquerschnitt analog zur Fig. 1 mit variierter Steuerung der Polkettfäden und mit Webfachbegrenzer,

Fig. 6

ein Bewegungsschaubild für einen Polfaden der Oberware passend zur Fig. 5,

Fig. 7

eine schematische perspektivische Darstellung eines Webfachbegrenzers,

Fig. 8

eine Detailansicht zur Führung der Webfachbegrenzer mittels Traglitze,

Fig. 9

eine detailiertere Darstellung des Webfaches, aus der die Staffelung der Litzenösen in den einzelnen Fachebenen ersichtlich ist,

Fig. 10

eine schematische Darstellung des Antriebes einer Litze mittels rotierendem Betätigungselement,

Fig. 11

ein Bewegungsdiagramm von Polfäden während eines Fachvertrittes unter Verwendung eines zeitlich begrenzten Überhubes und

Fig. 12

Bewegungsdiagramme von Polfäden während eines Fachvertrittes mit zeitlicher Staffelung des Durchganges durch die Mitte eines Webfaches.

The invention will be explained in more detail below with reference to exemplary embodiments. In the accompanying drawings show:

Fig. 1

a schematic cross section through the shed of a double pile loom,

Fig. 2

a movement diagram for a pile thread of the upper fabric,

Fig. 3

a movement diagram for a pile thread of the lower fabric,

Fig. 4

a representation of a double pile fabric with the course of the pile threads at the pile thread change,

Fig. 5

1 shows a schematic cross-section similar to FIG. 1 with varied control of the pile warp threads and with shed-limiter, FIG.

Fig. 6

a movement diagram for a pile thread of the top fabric suitable for Fig. 5,

Fig. 7

a schematic perspective view of a Webfachbegrenzers,

Fig. 8

a detailed view of the guidance of the shed limiter by means of support strand,

Fig. 9

a more detailed representation of the shed showing the staggering of the Litzenösen in the individual levels,

Fig. 10

a schematic representation of the drive of a strand by means of a rotary actuator,

Fig. 11

a movement diagram of pile threads during a subject use using a temporary overtravel and

Fig. 12

Movement diagrams of pile threads during a subject representation with time staggering of the passage through the center of a shed.

In Fig. 1, the principle of the present invention is according to a first Solution variant shown.

The double-pile fabric 6 is placed between the panels of the fabric guide 1, starting at the shot stop edge 11 withdrawn and guided. The Pole threads are either in the upper base fabric 61 or in the lower base fabric 62 tied off. The non-patterning pile threads 71 - Also called Totpole - the top fabric 61 are shown in FIG. 4 regularly between back shots 81 and inner shots 82 of the upper 61 involved. The same applies to the non-patterning pile threads 72 or totpole the lowerware 62 too. These are between the back shots 83 and Inner shots 84 of the lower base 62 integrated.

Will one of these previously not mustering pile threads 71; 72 for the pattern selected, then this selected pile thread 73 - different from the other not mustering pile threads - on the weft insertion zone 51 or under the weft insertion zone 52 to the outside (up or down) moves. The pile thread 73 spans from his last bond in his Basic goods 61 to the top right and touches the neighboring him Weft insertion zone 51. The eyelet 311 of this pile thread 73 leading strand 31 is located on the additional inner upper level O2, the through the two described points (last binding on its basic commodity 61 and the tangent to weft insertion zone 51) is defined.

A same position take in the Totpoleinbindung the pile threads 71 and 72, when they bind outside to the inner weft of their goods.

The forming in the range of movement of the reed 21 shed is significantly smaller than the shed that would form when the Eye of the strand 31 - as usual - would move to the position O1. Compare this in Fig. 1, the levels 730 and 740. The upper and the lower compartment limit becomes the center of expertise by the difference amounts a) and b) shifted by up to 10 mm each. The sley 2 or the reed 21 can be shortened or reduced by about this amount. The batten 2 or The reed 21 becomes lighter and more stable.

Sets this newly selected pile thread 73 from the position O2 his mustemde Moving on, the leading eyelet 311 moves its lead 31 - as shown in Fig. 2 - first in the outer, lower level U1 and then in the outer upper compartment level O1. This control of the pile thread does not affect the effective compartment height, because the last binding site the patterning pile threads respectively in the opposite base fabric 61, 62 is located.

If a previously not mustering pile thread 74 of the lower base product 62 for Selected pattern, this pile thread 74 is - according to Fig. 3 - from the Middle compartment M2 coming with the eyelet 321 of his strand 32 first to the shortened stroke H1 'moved to the lower level U2. The plane in the the pile thread 74 extends begins at the last binding site in the lower base fabric 62 and touches below and outside the lower weft insertion zone 52nd

In this way, also in this case the shed in the area of Bisched by the difference b) smaller than in a shedding in the traditional sense. The eyelet 321 of the strand 32 was after conventional manner moved to the level U1 and the pile thread extended so far in level 740.

The further course of the movement of the eyelet 321 on the strand 32 is shown in FIG. 3 seen. The pile thread 74 is in the following tours each in the outer compartment levels O1 and U1 moved. The shed in the area of Reed 21 is not larger in this case, because the previous Binding site of the pile threads 74, 75, 76 in each opposite Basic product 62, 61 is located.

Under the term used previously "affect a weft insertion zone" we do not understand the immediate tangling of the track of the weft insertion element. At a small distance, this web usually affects the binding warp threads 611, 621 or the so-called tensioning chain (see Fig. 9), which these weft insertion elements lead in the shed. The pile threads, mostly with lesser ones Are fed voltage and often tend to staples, affect the Weft insertion zone outside of the binding or Spannkettfäden.

Reducing the shelf height as shown could be special Polmaterialien for clamping the pile threads together and thus lead to the prevention of the compartment opening. This case occurs when a new one for patterning selected pile thread from the same over a long time binding Totpolstrang must be drawn. This usually takes place from the middle compartment from in the each own basic commodity assigned outer compartment.

This disadvantage is countered by the pile threads in the middle compartment M1, M2 staggered in height during the weft insertion, so that the pile threads are not parallel to each other and within a Rietlücke not be positioned next to each other.

In Fig. 1, this staggering is indicated by the eyelet positions in the middle compartment. It is convenient to this graduation in adjacent Rietlücken to vary. Of considerable importance for avoiding the staple effect is also the so-called Mittendurchgang when the mustering pile threads from one outer compartment to the other outer compartment or the Totpole between Change outer and middle compartment. Even in these phases, it is useful when crossing the middle compartment or the center of the pile threads staggered successively to meet each other. The brackets will significantly reduced and you can in total with reduced specialist height and work with reduced shed angle without pile threads cling and these clinging pile threads from the weft insertion element be penetrated. Compare also the explanations to the FIGS. 11 and 12.

This control described the pile threads at the beginning of their patterning or while patterning, however, is with the usual jacquard machines not feasible.

However, it is possible to control the necessary shedding movements to realize by so-called. Actuators or motors 37, each associated with a pile warp thread or its strand (compare FIGS. 10 and EP 1 063 326 B1).

The motors 37 described therein are received by the central controller corresponding differentiated control program with a shortened Hub, with a staggered start position and with a time-differentiated Middle passage.

H1; H1':

erfolgt aus einer der gestaffelten mittleren Fachpositionen zwischen M1 und M2 in eine Fachposition O2 und U2 bzw.

H2; H2':

aus einer Fachposition O2 nach U1 oder aus einer Fachposition U2 nach O1.

The shortened stroke

H1; H1 ':

takes place from one of the staggered middle specialist positions between M1 and M2 into a specialist position O2 and U2 or

H2; H2 ':

from a specialist position O2 to U1 or from a specialist position U2 to O1.

These and other common control programs for the motors 37 can be found in each stroke depending on the position of its strand 31 within the range 3 of the jacquard-controlled strands 31 are still varied such that the shed in the range of movement of the reed 21 a predetermined maximum size does not exceed.

If the Poffaden is returned to its basic commodity at the end of its pattern, he moves into the middle compartment M1 and is there the group of not mustering pile threads again assigned in his graduation and follows from here on from the control program or the differentiated control programs for the so-called Totpole 71; 72nd

It should be noted again that even during the binding of the pile threads as Totpol the shortened stroke H1, H1 'is then executed when this outside above the respective inner weft 82, 84 bind.

In Fig. 5 is a second variant of the method for limiting the compartment height represented in the range of movement of the sley 2. Immediately behind the rearmost position of the sley 2 and its reed 21 are shed limiters 4 arranged. These shed limiters 4 are located in one the levels that are different from the last bond to the own basic product 61, 62 as an outer tangent to the adjacent weft insertion zones 51, 52 extend upwards or downwards.

These planes are characterized by the portions of the pile threads 73a and 74a, respectively. When using the shed limiters 4, 41, 42 needs the Stroke size H of the strands 31, 32 not on the inner and outer outer compartments be differentiated. However, the graduation of the Specialist positions in the middle subject M1, M2 and the staged passage through the middle compartment M1, M2.

The shed can also in this embodiment in the range of motion Reed 21 can be kept small. The dimensions of the batten 2 are reduced and allow a high-speed operation of the weaving machine.

Given the very limited space between the rearmost position the reed 21 and the jacquard-controlled strands 31, 32 and in view the fact that the space 3 in the area of the jacquard strands 31, 32 for Operations must be accessible, it is difficult provide frame-fixed Fachbegrenzer 4 in this area.

According to an advantageous embodiment of the present invention the shed limiters 4 are formed as tension wires 41, both sides the shed using clamping elements 410, 420 Be anchored frame-fixed (See Fig. 7 and Fig. 8).

These tension wires 41 are at intervals along the shed with Help of strands 43, which are equipped with eyelets 44 and 45, out. These in turn are fixed to the frame on upper support rails 47 and over Feathers 46 fixed to lower clamping rails 48. The tension wires 41; 42 Be along their axis by means of clamping elements 410; 420 pretensioned, so that the number of trunnions 43 is limited. This arrangement of the shed limiters 4 is sufficiently stable for the intended subject limitation and hinders the insertion of pile threads 71 to 76 in the eyelets 311, 321 of Strands 31, 32 are not.

While in the description of Figures 1 and 5, the staggering of individual end positions and passages of the pile threads in the middle compartment and in the outer compartments has been shown only very schematically, is shown in FIG. 9 on a scaled slightly stretched example of a shed staggering the eyelet positions in the middle compartment M shown. The left triad the strands 31 is associated with the pile warp threads of the upper fabric 61, while the Litzengruppe 32 of the lower basic product is associated.

The marked eyelet positions 311 M, 321 M in the middle section M1 are on the one hand those positions of the eyelet 311, 321, the pile threads at a Totpolbindung in the middle compartment M1 as a temporary end position taking. Pattern these pile threads, then these positions are about those the respective pile threads during the technical assistance to a uniform Take time.

We can see from this that only very few of such graduations are At the same time encounter pile threads in a riveting gap of the reed. The brackets the pile threads together will be apparent in such an embodiment limited. The mutual influence of the pile threads within one Rietlücke is kept to a minimum.

A similar operation is realized in the outer compartments. If the Bind dead poles in the upper outer compartment, there are the eyelets of the strands in position 311/02. In this position, this threesome has one Position that with tense pile threads none of the same within a Rietlücke is led immediately next to a second.

Become a patterning pile thread from this strand of pile threads in the outer pocket removed, then the bracketing effect is limited there as well. Consider we see the patterning pile threads in the respective outer compartment O1, U1, we see one Similar staggering of the pile threads, as we related them to the Totpole in the Outer compartment O2, U2 have described. However, it is not absolutely necessary also to carry out a corresponding staggering in this area, because usually only one of the pile threads at the same time in this level inspect.

The similar graduation was used here therefore for programming the individual actuators through the use of uniform Program complexes can be simplified.

In Fig. 10 is again schematically the way the drive of the Strands 31 for the pile threads by means of an actuating element - here a Motor 37 - shown. The strand 31 in the lower region leads in its eyelet 311st the pile thread. One of the strand 31 up leading rope 33 is over a loose roller 34 and is fixed to the frame-fixed bar 49. The Axis of the loose roller 34 is replaced by another cable 35 with the cable drum 36 of the actuating element 37 is connected. The cable drum 36 has spiral grooves in which the rope 35 filed filed and released can be.

By using the loose roller 34, the size of the cable drum 36 kept to a minimum. As a disadvantage, however, it should be noted that In this case, the required drive torque is increased. That in turn leads to a significant increase in the dimensions of the motors 37. It remains up to the expert, whether he is the double-sided looms required larger compartment dimensions with or without loose roll 34 realized.

FIGS. 11 and 12 once again show the movement diagrams, after which the pile threads during the Fachvertrittes by the Actuators are controlled to be moved. The specialist takes place in essential in the period from leaving the shed by a Weft insertion element S in a first tour and the reentry of Weft insertion element S1 into the shed in a second tour instead

In Fig. 11, the motion diagrams F and F1 show the usual ones Movement form. It begins and ends in the respective prescribed level. When controlling the shedding of pile threads must be the brace effect be prevented. For this purpose, the motion diagrams F3 and F4 so changed, at least in the region of the end position of the movement a temporary overtravel H3 is performed before the pile thread remains permanently in its new technical level. An overrun H4 can too be carried out before a specialist. Depending on the polystyrene used can thus be a pile thread better removed from a threadline become.

FIG. 12 shows movement diagrams F5 to F7 of pile threads which at different times the center of expertise in the area E and others Cross pile warp threads. It goes without saying that even in these cases with an overstroke, as described with reference to FIG. 11 has been described.

LIST OF REFERENCE NUMBERS

1

tissue management

11

Weft stop edge

2

batten

21, 21 '

reed

3

Jacquardlitzenbereich

31

braid

311

eyelet

32

braid

321

eyelet

33

rope

34

loose roll

35

rope

36

cable drum

37

Engine, actuator

4

Webfachbegrenzer

41

tension wire

410

clamping element

42

tension wire

420

clamping element

43

Traglitze

44

eyelet

45

eyelet

46

feather

47

retaining rail

48

tensioning rail

49

rail

51

Weft insertion zone (upper)

52

Weft insertion zone (lower)

6

tissue

61

Basic goods, upper

62

Basic goods, lower

(7)

pile threads

71

Pole threads, not mustering, Totpol, Oberware

72

Pole threads, not eyeing, Totpol, Unterware

73

Pole threads, selected for patterning, new / level

730

Pole threads, selected for patterning, old

73a

Pile threads, selected for patterning, with shed edge delimiters; from own goods / level

73b

Pile threads, selected for patterning, with shed edge delimiters; from foreign goods

74

Pole threads, selected for patterning, new / level

740

Pole threads, selected for patterning, old

74a

Pile threads, selected for patterning, with shed edge delimiters; from own goods / level

74b

Pile threads, selected for patterning, with shed edge delimiters; from foreign goods

75

Polfaden, eyeing

76

Polfaden, eyeing

81, 82

weft

83,84

weft

91

Filling chain / tensioning chain - upper fabric

92

Filling chain / tensioning chain - lower fabric

01

upper, outer compartment level

02

upper, inner compartment level

M1

middle level (upper product)

M2

middle level (lower product)

U1

lower, outer level

U2

lower, inner level

H

stroke

H1, H1 '

shortened stroke

H2, H2 '

Sample stroke, shortened

H3, H3 '

blowout

a, b

difference

E, E1

Intersection area / center of expertise

F, F1 ... F7

Motion charts

F5 '... F7'

Motion charts

S

Weft entry - end - 1st tour

S '

Weft insertion - beginning - 2nd tour

Claims (11)

Method for shedding jacquard patterned pile warp yarns on a double pile weaving machine, comprising at least two weft insertion zones (51, 52) arranged one above the other between adjacent shed levels,
wherein the pile threads are each assigned to one level (O, M, U) via strands (31, 32) prior to each weft insertion - corresponding to the pattern and the selected binding - and finally moved thereto according to the open-pocket method of operation,
the group of non-patterning pile threads (71, 72) being bound in an upper and / or lower base fabric (61, 62) and the patterning pile threads (75, 76) alternating in the upper base fabric (61) and the lower base fabric (62 ) and finally clamped between the two basic products (61, 62),
characterized in that the strands (31, 32) by means of electrical, controlled by selectable programs actuators (37), are driven and
in that the stroke size of the strands (31, 32) leading the pile threads is varied in such a way that the shed height in the area of the rearmost end position of the sley (2) corresponds to the maximum of those depending on the last integration in one of the two basic products (61, 62) , which pretend the respectively mustering pile threads (75, 76). A method according to claim 1, characterized in that the end positions and / or the passage positions of the pile threads in the central compartment (M1, M2) are staggered such that regularly not more than two pile threads, which are assigned to a Rietlücke, simultaneously in a plane are or encounter each other. Method according to claim 1 or 2, characterized in that the pile yarns (71, 72) , which are not patterned in their own base fabric (61, 62) or as totem poles for the last time, are always inserted into their own basic fabric (61, 62 ) associated external compartment (0, U) are performed, a shortened stroke (H1, H1 ') in a separate inner outer compartment (02, U2) run and
that the shortened stroke (H1, H1 ') terminates in a plane (73, 74) which starts at the last binding point of the own base product (61, 62) and which forms the respective outer weft insertion zone (51, 52 ) touched on the outside. A method according to claim 1 or 2, characterized in that the end positions of the pile threads are staggered in the outer compartments such that regularly not more than two pile threads, which are associated with a Rietlücke, are simultaneously in a plane or encounter each other. Method according to claim 1 or 2, characterized in that the strands leading the pile threads carry out a brief overstroke (H3, H3 ') in the case of a specialist representation in an outer compartment in the area of the outer compartment. Method according to claim 1 or 2, characterized in that the strands leading the pile threads of a rivet gap pass through the middle compartment (M) in a time-offset manner. A method according to claim 1, characterized in that the strands (31, 32) are driven by means of electrical program-controlled actuators.
that the pile warp yarns (73, 74) are always performed according to the pattern in one of the outer shed planes (O1, U1),
that shed between the batten (2) and the strands (31, 32) in the region of two planes (73a, 74a), which start at the last binding points of one of the base goods (61, 62) and which touch the outer weft insertion zone (51, 52) arranged at approximately the same height on the outside, ie at the top or bottom, is reduced by a difference (a, b) over the width of the shed by means of upper and lower shed limiters (4, 41, 42) and that the end positions and / or the passage positions of the pile threads in the region of the central compartment are staggered in such a way that regularly no more than two pile threads which are assigned to a rivet gap are located in one plane at the same time or encounter one another. Apparatus for forming jacquard pattern pile warp yarns on a double pile loom
with at least two weft insertion zones (51, 52) arranged one above the other, which are each assigned to the area of one of the basic articles (61, 62) of the double pile fabric (6),
with shed-forming elements having strands (31, 32) with eyelets (311, 321) for guiding the pile threads (7),
wherein the strands (31, 32) - corresponding to the pattern and the binding - before each weft insertion of one of at least three shed levels (0, M, U) can be assigned by means of selection elements and are movable there by means of drive elements,
for implementing the method according to claim 1,
characterized in that the respective outer compartment levels (O, U) are defined by two different height positions (O1, O2, U1, U2) of the strands,
that the respective outer height position (O1, U1) of the heald (31, 32) is defined by a plane which starts at the last binding point of one of the base goods (61, 62) and externally touches the weft insertion zone (52, 51) in the region of the other base goods (62, 61), in that the respective inner height position (O2, U2) of the strand (31, 32) is defined by a plane (73, 74) which starts at the last binding point of one of the base goods (61, 62) and which is arranged at approximately the same height , each outer weft insertion zone (51, 52) is externally tangent and,
in that the drive elements for the strands (31, 32) are individually controllable motors which can be electrically controlled according to different programs either in the inner (O2, U2) or in the outer height position (O1, U1). Apparatus according to claim 8, characterized in that at least the eyelets of those strands whose pile threads are positioned in the middle compartment M1, M2, are staggered in height. Device for shedding jacquard-patterned pile warp threads on a double-pile fabric
with at least two weft insertion zones (51, 52) arranged one above the other which are respectively assigned to the area of one of the basic articles (61, 62) of the double pile fabric (6),
with shedding elements, the strands (31, 32) with eyelets (311, 321) for guiding the pile threads (7) have and
with a sley (2) with reed (21),
for implementing the method according to claim 1,
characterized in that between the reed (21) of the sley (2) and the range of movement of the strands (31, 32) upper and lower shed limiters (4, 41, 42) are arranged and
in that the stops of the shed limiters (4, 41, 42) delimiting the shed are arranged on respective ones of planes (73b, 74b) which start at the last binding point of one of the basic articles (61, 62) and which are arranged at about their height , Outer outer weft insertion zone (51, 52) tangentially. Device according to claim 10, characterized in that the shed limiters (4) consist of guidewires (41, 42) aligned parallel to the tissue stop edge (11), which are guided at intervals by eyelets (44, 45) on vertically immovable, tensioned carrier strands (43) are attached.

Images