EP2004889B1 - Webbing, method and ribbon needle loom for producing the same - Google Patents

Abstract

A method for weaving a webbing, comprising at least one first right-hand weft thread and at least one second left-hand weft thread, characterized in that the two weft threads are introduced into the same shed from both sides of the webbing, are wound around weft thread retainers in weft change loops, are substantially retained by the weft thread retainers until shed change and are then stripped off from the left thread retainers by the reed and after shed change and are bound against the stop.

Description

The present invention relates to a method of weaving a ribbon with a right weft thread (SFR) and a left weft thread (SFL) and a needle ribbon loom.

From the Scriptures DE 27 19 382 C3 (Berger ) it is known to weave a single-layer webbing with hollow edges on a needle-loom with a single weft needle. One of two single-ply edge portions is used to form the one hollow edge by pulling the weft thread up to the edge of the middle part.

From the Scriptures CH 648 069 A5 (Berger ) is known to produce a webbing, in particular for car safety belts, on a needle ribbon loom. The webbing has a relatively stiff central part and soft edge parts which are pulled around to hollow edges. To increase the production speed two weft needles are provided, which work in parallel to each other, the one weft needle enters a soft weft thread in the middle part and both edge parts, the other enters a stiffer weft only in the middle part and of the two edge parts only the two outermost warp threads detected. Two weft needles simultaneously carry two different weft materials in z. T. different specialist openings. Of the one weft yarn, which is entered only over the middle part, the two flat edge parts are pulled around to hollow edges. The middle section is strengthened and higher performance is achieved. The aim was to achieve twice the performance by using two weft needles over one-needle systems. The through the two weft needles themselves However, the resulting larger mass and the required large and rapid movements of auxiliary thread inserts only allowed to achieve significantly less than twice the web performance.

From the Scriptures DE 33 45 508 C2 (Leperband ) is known a webbing, which is woven monolayer. After that, two different shooting games are also entered simultaneously with two weft needles. A monofilament weft thread is only used to reinforce the middle part and must not be used for pulling the flat edge parts.

The GB-A-652 552 discloses a needle ribbon loom for weaving a ribbon having an interior region, a soft right edge region and a soft left edge region, with a right weft thread and a left weft thread.

The WO-A-91/14814 discloses a method for weaving a tape having at least a first right weft thread and at least a second left weft thread, the two weft threads being inserted from both sides into the same pocket.

The GB-A-1 243 354 discloses a ribbon having shot loops or picots arranged outside the band adjacent to the left or right edge region.

The known straps and methods for producing the same are too expensive by today's standards and can no longer satisfy the meantime increased demands of vehicle manufacturers. In particular, the requirements for straps with comfortable soft edge areas have increased, while the interior area should have the highest lateral stiffness. In addition, the known devices for the production of straps are very complicated and difficult to control in operation.

The object of the present invention is to propose a webbing, a method and a needle-loom of the type mentioned above,
wherein the disadvantages known from the prior art are avoided or at least greatly minimized.

This object is achieved by a method according to claim 1, namely a method for weaving a tape with a right weft thread and a left weft thread, which is characterized in that the two weft threads from both sides of the tape registered simultaneously in the same subject, in Schussumkehrschlaufen order Shot retainer laid around, are essentially held to the stop by the reed at the stop of weft retainers and that only then a subject change is made.

With the procedure according to the invention, it is apparent that both weft threads enter from the right or left weft insertion side simultaneously and almost symmetrically across the tape, where they are respectively held on the opposite side by a weft retainer arranged there, after which the weft needles retreat to their side, and take the weft thread and keep it taut until the reed strikes the freshly inserted weft threads on the already woven strip material, wherein the shot threads held up to this time by the weft retainers and fixed by the previous change of subject.

The tape is advantageously made entirely without the use of catch or crochet hooks, reed or calliper needles. There is also no meshing or crocheting of the weft thread. These elaborate devices which are considered obligatory in weaving apparatuses according to the prior art can be dispensed with when the method according to the invention is used. Only weft retainers which are e.g. can be attached to the usual controls of Fangnadelhaltern are required.

ar)

Eintragen des rechten Schussfadens von der rechten Bandseite aus in den rechten Randbereich und den Innenbereich mittels einer rechten Schussnadel,

al)

Eintragen des linken Schussfadens von der linken Bandseite aus in den linken Randbereich und den Innenbereich mittels einer linken Schussnadel, simultan zu Schritt ar),

br)

Festhalten des rechten Schussfadens im Übergangsbereich vom Innenbereich zum linken Randbereich mittels eines linken Schussrückhalters,

bl)

Festhalten des linken Schussfadens im Übergangsbereich vom Innenbereich zum rechten Randbereich mittels eines rechten Schussrückhalters, simultan zu Schritt br),

cr)

Fangen des rechten Schussfadens mit dem linken Schussrückhalter und Zurückfahren des linken Schussrückhalters bis zum Blattanschlag,

cl)

Fangen des linken Schussfadens mit dem rechten Schussrückhalter und Zurückfahren des rechten Schussrückhalters bis zum Blattanschlag, simultan zu Schritt cr),

dr)

Zurückfahren der rechten Schussnadel zur rechten Bandseite,

dl)

Zurückfahren der linken Schussnadel zur linken Bandseite, simultan zu Schritt cr),

e)

Abstreifen der im vorhergehenden Schritt gebildeten Schussschlaufen von den beiden Schussrückhaltern durch das Webblatt zum Blattanschlag und Vorwärtsbewegen der beiden Schussrückhalter weg vom Blattanschlag,

f)

Anschlagen der beiden Schussfäden mit einem Webblatt.

An advantageous development of the method according to the invention for weaving a webbing with an inner region, a preferably soft right edge region and a preferably soft left edge region, is characterized by the following repetitive first step sequence:

ar)

Inserting the right weft thread from the right side of the ribbon into the right edge region and the inner region by means of a right weft needle,

al)

Inserting the left weft thread from the left side of the tape in the left edge area and the inside area by means of a left weft needle, simultaneously to step ar),

br)

Holding the right weft thread in the transition region from the inner region to the left edge region by means of a left weft retainer,

bl)

Holding the left weft thread in the transition region from the inner region to the right edge region by means of a right weft retainer, simultaneously to step br),

cr)

Catching the right weft with the left weft retainer and retracting the left weft retainer to the sheet stop,

cl)

Catching the left weft thread with the right weft retainer and retracting the right weft retainer to the sheet stop, simultaneously to step cr),

dr)

Retracting the right weft needle to the right side of the band,

dl)

Retracting the left weft needle to the left side of the tape, simultaneously to step cr),

e)

Stripping the weft loops formed in the preceding step from the two weft retainers by the reed to the sheet stop and advancing the two weft retainers away from the sheet stop,

f)

Striking the two weft threads with a reed.

The method is advantageous in that two weft yarns leading to the weft threads, each coming from the right or left weft insertion side, simultaneously and almost symmetrically enter the weft yarns across the tape, which respectively on the opposite side in the transition region between the inner region and the edge region of a there each arranged weft retainer are held, after which the weft needles back to their side, and take the weft yarn and keep it taut until the reed strikes the freshly inserted weft threads on the already woven webbing, which up to this time of the weft retainers held weft threads struck and fixed by the following subject change.

When using the method according to claim 2 according to the invention results in the arrangement of the weft threads, that both are arranged in the inner region and in each case one is present only in the edge region which belongs to its weft insertion side. This results in the advantage that the edge regions are each occupied only with a weft thread and thus are softer, while the two weft threads in the interior this, due to the double compared to the edge regions amount of material provided with a higher transverse stiffness.

A further advantageous development of the method according to the invention for weaving a webbing whose right and left weft threads are hybrid threads is characterized by the following step, which is carried out after the weaving process: thermosetting of the webbing. In this case, hybrid threads are used as weft threads, which are converted by a post-weaving thermofixing process into monofilament-like thread structures and give the webbing according to the invention an increased monofilament qualities approaching transverse stiffness without actually using monofilament.

Hybrid threads are threads consisting of materials of different melting temperatures. These are known from the prior art. The advantage here is that after interweaving such hybrid yarns as weft yarns as claimed herein, solidification of hybrid yarns into a monofilament-like state is enabled when subjected to a heat setting process after weaving. Here, the components of the lower melting point hybrid filaments melt and flow, embedding the higher melting point components into monofilament-like structures with the benefits of monofilament-like structures, namely, increased flexural elasticity, transverse stiffness and, as webbings call it, cross-belt return force ,

az)

Eintragen eines, vorzugsweise im Übergangsbereich vom Innenbereich zum linken Randbereich, zugeführten Monofil-Schussfadens von links nach rechts bis zum Übergangsbereich vom Innenbereich zum rechten Randbereich, mittels einer linken Zusatz-Schussnadel simultan zu Schritt ar),

bz)

Festhalten des Monofil-Schussfadens im Übergangsbereich vom Innenbereich zum rechten Randbereich mittels des rechten Schussrückhalters simultan zu Schritt br),

cz)

Fangen des Monofil-Schussfadens mit dem rechten Schussrückhalter und Zurückfahren des rechten Schussrückhalters bis zum Blattanschlag simultan zu Schritt cr),

dz)

Zurückfahren der linken Zusatz-Schussnadel simultan zu Schritt dr).

A further advantageous embodiment of the method according to the invention is to use in addition to the left weft needle a left additional weft needle for the entry of a monofilament weft thread, which is now supplied in the transition region between the left edge region and the inner region, wherein the monofilament weft thread on both sides In addition to the weft threads just mentioned is also held by the weft retainers, so that as a result, the additional monofilament weft thread is woven only indoors. The method is characterized by the following further steps:

az)

Introducing a monofilament weft thread, preferably in the transition region from the inner region to the left edge region, from left to right to the transition region from the inner region to the right edge region, by means of a left additional weft needle simultaneously to step a),

bz)

Holding the monofilament weft thread in the transition region from the inner region to the right edge region by means of the right weft retainer, simultaneously with step br),

cz)

Catching the monofilament weft with the right weft retainer and retracting the right weft retainer to the sheet stop simultaneously with step cr),

dz)

Retracting the left additional weft needle simultaneously to step dr).

Grasping, loosening and striking the monofilament weft thread is analogous to the processes relating to the weft threads just described. For this purpose, as will be explained later in the description, an additional weft needle is used.

The additionally used according to the invention in the interior additional weft thread of monofilament advantageously leads to the webbing in the interior with a provide increased transverse rigidity, while at the same time the edge areas are soft as desired.

apr)

Eintragen des rechten Schussfadens von der rechten Bandseite aus über die gesamte Bandbreite über die linke Bandseite hinaus mittels einer rechten Schussnadel,

apl)

Eintragen des linken Schussfadens von der linken Bandseite aus über die gesamte Bandbreite über die rechte Bandseite hinaus mittels einer linken Schussnadel, simultan zu Schritt apr),

bpr)

Festhalten des rechten Schussfadens außerhalb des Bandes neben dem linken Randbereich mittels eines zweiten linken Schussrückhalters und Bilden von Schussschlaufen,

bpl)

Festhalten des linken Schussfadens außerhalb des Bandes neben dem rechten Randbereich mittels eines zweiten rechten Schussrückhalters und Bilden von Schussschlaufen, simultan zu Schritt bpr),

dr)

Zurückfahren der rechten Schussnadel zur rechten Bandseite,

dl)

Zurückfahren der linken Schussnadel zur linken Bandseite simultan zu Schritt dr),

ep)

Loslassen der in den Schritten bpr) und bpl) gebildeten Schussschlaufen von den beiden zweiten Schussrückhaltern,

f)

Anschlagen der beiden Schussfäden mit einem Webblatt.

A further advantageous development of the method according to the invention for weaving a
Bandes is characterized by the following, optionally with the first step sequence according to claim 2, alternating second step sequence for selectively forming picots at the outer edges of the band:

apr)

Inserting the right weft thread from the right side of the band across the entire bandwidth beyond the left side of the band by means of a right weft needle,

apl)

Insertion of the left weft thread from the left side of the tape over the entire bandwidth beyond the right side of the tape by means of a left weft needle, simultaneously to step apr),

bpr)

Holding the right weft thread outside of the band next to the left edge area by means of a second left weft retainer and forming weft loops,

bpl)

Holding the left weft thread out of the band next to the right edge area by means of a second right weft retainer and forming weft loops, simultaneously to step bpr),

dr)

Retracting the right weft needle to the right side of the band,

dl)

Retracting the left weft needle to the left side of the tape simultaneously to step dr),

ep)

Releasing the weft loops formed in steps bpr) and bpl) from the two second weft retainers,

f)

Striking the two weft threads with a reed.

This makes it possible to produce tapes with arbitrarily arranged weft loops projecting over the edge or so-called picots. This is particularly interesting in the field of strip and strand production, primarily for the manufacture. This also includes a further advantageous development of the method according to the invention, which is characterized in that elastic warp threads are used.

In an advantageous embodiment of the method according to the invention are used as weft threads multifilament yarns that guarantee a soft edge. In the As a rule, multifilament threads are also used as warp threads of straps for safety belts. This results in the edge regions advantageously the desired soft edge.

In a further advantageous embodiment of the method according to the invention elastic warp threads are used. Thus, with the new method, the production of elastic bands for the confection is problem-free.

The object is also solved by a needle-loom according to claim 8, which is equipped with right and left weft needle, which are simultaneously controllable to each other, and a right and left shot retainer, which for holding and releasing the left or Serve right weft and also coordinated to each other, in particular, are formed simultaneously working together, and having a reed.

In a further advantageous embodiment of the invention, the needle-loom is characterized in that the weft retainers are mounted fixed to the machine, and that on the reed, preferably slightly towards the sheet stop-oriented stripping and holding wires are arranged elastically, which are suitable due to the Sheet movement of the weft needles on the hooks of the weft retainer slipped weft loops before the tray change and before the sheet stop of the weft retainers strip and hold by pressing against the sheet stop until it strikes the reed itself.

The needle-loom according to the invention may additionally be characterized in that the weft retainers are formed vertically resilient so that they can be easily lifted by the taut weft threads and facilitate the sliding down the weft threads.

With the needle band machine according to the invention, the inventive method for producing a webbing according to the invention can be produced in a much simpler and more wear-resistant manner, as is known from the prior art. For the production of soft edges no fishing threads and no locking threads are required. The entire equipment required for this purpose is also eliminated. This greatly simplifies the manufacture of the webbing over the prior art methods and devices. When using hybrid threads as weft threads, a heat-setting operation is performed after the weaving process. However, this does not lead to higher process costs compared to the prior art known methods, since usually all webbings, even if they are not made of hybrid wefts, go through a heat setting process to the webbings on the right shrink, the right degree of stretching and the desired Set reserve reserve.

Further advantages and features can be found in the dependent claims.

Fig. 1

zeigt schematisch ein stark vergrößertes Gurtband und wesentliche Teile einer Nadel-Bandwebmaschine während einer ersten Verfahrensstufe, bei der die Schussnadeln ungefähr zu einem Drittel im Webfach angelangt sind.

Fig. 2

zeigt schematisch ein stark vergrößertes Gurtband und die Teile der Nadel-Bandwebmaschine während einer zweiten Verfahrensstufe, wobei sich die Schussnadeln in maximal ausgefahrener Endstellung befinden.

Fig. 3

zeigt schematisch ein stark vergrößertes Gurtband und die Teile der Nadel-Bandwebmaschine während einer dritten Verfahrensstufe, wobei das Webblatt sich kurz vor dem Anschlag befindet. Die Schussnadeln sind hierbei (wieder) maximal zurückgefahren.

Fig. 4

zeigt eine der Darstellung von Fig. 1 ähnliche Darstellung, jedoch mit zusätzlich eingesetzter Monofil-Schussnadel zum Eintrag eines Monofil-Fadens.

Fig. 5

zeigt eine der Fig. 2 entsprechende Darstellung mit Einsatz einer zusätzlichen Monofilschussnadel.

Fig. 6

zeigt eine der Fig. 3 analoge Darstellung mit einer zusätzlich eingesetzten Monofilschussnadel.

Fig. 7

zeigt sehr stark schematisiert eine Variante eines maschinenfest montierten Schussrückhalters sowie ein sich daraufzu bewegendes Webblatt in der Situation, in der sich zwischen Webblatt und Schussrückhalter noch die Schussnadeln befinden, schematisch von der Seite gezeigt, für eine Bandkante.

Fig. 8

zeigt ebenso schematisch wie in Fig. 7 dargestellt die eben beschriebene Konfiguration zu einem etwas späteren Zeitpunkt, in dem bereits ein Abstreif- und Haltedraht mit der Schussschlaufe in Kontakt kommt, um diese zum Blattanschlag zu schieben.

Fig. 9

zeigt in sehr stark vergrößerter Darstellung die Situation gemäß Fig. 8, gesehen in Blickrichtung des Pfeils DS aus Fig. 8.

Fig. 10

zeigt das in den Fig. 7 und 8 beispielhaft gezeigte Webblatt mit der beispielhaften Anordnung eines Abstreif- und Haltedrahts.

Fig. 11

zeigt schematisch eine Draufsicht auf ein Band mit Picots an den Rändern.

Fig. 12

zeigt schematisch eine Draufsicht auf eine stark auseinander gezogene Einzelheit des Bandes nach Fig. 11 zur Verdeutlichung der Herstellung von Picots an den Rändern.

Fig. 13

zeigt schematisch eine Seitenansicht der bei der Herstellung eines Bandes gemäß den Fig. 11 und Fig. 12 eingesetzten Schussrückhalterstellungen.

Fig. 14

zeigt schematisch teilweise in Schnittansicht ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung mit einer Schussnadel für zwei Schussfäden, mit Öse und Fangvorrichtung.

Fig. 15

zeigt schematisch teilweise in Schnittansicht eine Vergrößerung der Einzelheit X aus Fig. 14 von der Seite und von oben.

For a better understanding of the invention, this will be briefly described below with reference to two embodiments.

Fig. 1

shows schematically a greatly enlarged webbing and essential parts of a needle-loom during a first stage of the process, in which the weft needles have reached about one-third in the shed.

Fig. 2

schematically shows a greatly enlarged webbing and the parts of the needle-loom during a second stage of the process, the weft needles are in maximum extended end position.

Fig. 3

schematically shows a greatly enlarged webbing and the parts of the needle-loom during a third stage of the process, wherein the reed is located just before the stop. The weft needles are here (again) reduced maximum.

Fig. 4

shows a representation of Fig. 1 similar representation, but with additionally inserted monofilament weft needle for the entry of a monofilament thread.

Fig. 5

shows one of the Fig. 2 corresponding representation with use of an additional Monofilschussnadel.

Fig. 6

shows one of the Fig. 3 analog representation with an additionally used monofilament weft needle.

Fig. 7

shows very strongly schematized a variant of a machine-mounted weft retainer and a thereto to be moved reed in the situation in which between reed and weft retainer still the weft needles are, shown schematically from the side, for a band edge.

Fig. 8

shows as schematically as in Fig. 7 illustrated the configuration just described at a later date, in which already comes a stripping and holding wire with the weft loop in contact to push them to the sheet stop.

Fig. 9

shows the situation in a very much enlarged view Fig. 8 , seen in the direction of the arrow DS Fig. 8 ,

Fig. 10

shows that in the FIGS. 7 and 8 Webbed exemplified with the exemplary arrangement of a stripping and holding wire.

Fig. 11

schematically shows a plan view of a band with picots at the edges.

Fig. 12

schematically shows a plan view of a strongly pulled apart detail of the tape Fig. 11 to illustrate the production of picots on the edges.

Fig. 13

schematically shows a side view of the manufacture of a tape according to the 11 and FIG. 12 used shot retention positions.

Fig. 14

shows schematically partially in section a further embodiment of a device according to the invention with a weft needle for two weft threads, with eyelet and safety gear.

Fig. 15

schematically shows a partial enlargement of an enlargement of the detail X in part Fig. 14 from the side and from the top.

Fig. 16a to 16c show schematically partially in sectional view an enlargement of the detail X from Fig. 14 from the side in three different stages X ₁ to X ₃ .

Fig. 1 shows a webbing 2, wherein the right and left side of the webbing to correspond to the right and left sides of the drawing, corresponding to the capital letters R and L, which below the Fig. 1 in circles. This reading should apply to all figures discussed here.

The webbing 2 is schematically divided into three areas, a left edge area RL, an inside area M and a right edge area RR. In the respective transition region from the left edge region to the inner region and from the inner region to the right edge so-called shot retention SRHR (right) and SRHL (left) are arranged, which in the Fig. 2 and 3 with its breakpoint, which is marked there as a thick black dot, should be indicated. These breakpoints are the auxiliary retention points which, due to their function, lead to the shot reversal points opposite the weft insertion side, which lie within the material of the webbing according to the invention and thus "disappear". Outside these shot reversal points is only the soft edge, which is shown only by a weft.

In the Fig. 1 illustrated situation shows the weft needles SNL and SNR about a third retracted into the shed, while Fig. 2 already shows the end position of the weft needles in the maximum entry state. Fig. 3 again shows the opposite, maximum retracted situation of the weft needles SNL and SNR and also formed due to the weft retention function shot reversal points on the outer edge of the inner region. One recognizes in Fig. 3 Also, already moved closer to the entry zone reed WB, which moves in the next step according to the adjacent arrow on the freshly entered weft threads and this strikes the, already hatched below shown woven material. Here, the shot retainers lose their function for a short while while the shot reversal points are removed as it were. In the figures, especially in Fig. 1 by way of example, on the right side, a weft retainer SRHR is shown which has the form of a sawtooth. In Fig. 1 For example, the two weft threads SFR and SFL are shown as dots in cross-section just before they are pushed onto the weft retainer SRHR due to the movement of the weft needles, so that they are in the position shown in FIG Fig. 2 (right side) is shown arriving. Fig. 3 (right side) already shows the state of the shot retainer SRHR, in which the weft threads taken from this and struck by the action of the reed on the material.

ar)

Eintragen des rechten Schussfadens SFR von der rechten Bandseite aus in den rechten Randbereich RR und den Innenbereich M mittels einer rechten Schussnadel SNR,

al)

Eintragen des linken Schussfadens SFL von der linken Bandseite aus in den linken Randbereich RL und den Innenbereich M mittels einer linken Schussnadel SNL simultan zu Schritt ar),

br)

Festhalten des rechten Schussfadens SFR im Übergangsbereich vom Innenbereich M zum linken Randbereich RL mittels eines linken Schussrückhalters SRHL,

bl)

Festhalten des linken Schussfadens SFL im Übergangsbereich vom Innenbereich M zum rechten Randbereich RR mittels eines rechten Schussrückhalters SRHR simultan zu Schritt br),

cr)

Fangen des rechten Schussfadens SFR mit dem linken Schussrückhalter SRHL und Zurückfahren des linken Schussrückhalters SRHL bis in den Bereich des Blattanschlags BA,

cl)

Fangen des linken Schussfadens SFL mit dem rechten Schussrückhalter SRHR und Zurückfahren des rechten Schussrückhalters SRHR bis in den Bereich des Blattanschlags BA, simultan zu Schritt cr),

dr)

Zurückfahren der rechten Schussnadel SNR zur rechten Bandseite,

dl)

Zurückfahren der linken Schussnadel SNL zur linken Bandseite simultan zu Schritt cr),

e)

Abstreifen der im vorhergehenden Schritt gebildeten Schussschlaufen von den beiden Schussrückhaltern SRHR, SHRL durch ein Webblatt WB zum Blattanschlag BA und Vorwärtsbewegen der beiden Schussrückhalter SRHR, SHRL weg vom Blattanschlag BA,

f)

Anschlagen der beiden Schussfäden SFR, SFL mit dem Webblatt WB.

The inventive method for producing a belt, having an inner region (M), a soft right edge region RR and a soft left edge region RL, with a right weft SFR and a left weft SFL, runs after the following repetitive step sequence:

ar)

Inserting the right weft SFR from the right side of the band into the right edge region RR and the inner region M by means of a right weft needle SNR,

al)

Inserting the left weft thread SFL from the left side of the tape into the left edge area RL and the inside area M by means of a left weft needle SNL simultaneously to step ar),

br)

Holding the right weft SFR in the transition region from the inner region M to the left edge region RL by means of a left weft retainer SRHL,

bl)

Holding the left weft thread SFL in the transition region from the inner region M to the right edge region RR by means of a right weft retainer SRHR simultaneously to step br),

cr)

Catching the right weft SFR with the left weft retainer SRHL and retracting the left weft retainer SRHL into the area of the sheet stop BA,

cl)

Catching the left weft thread SFL with the right weft retainer SRHR and retracting the right weft retainer SRHR into the area of the sheet stop BA, simultaneously with step cr),

dr)

Returning the right-hand weft needle SNR to the right-hand side of the band,

dl)

Retracting the left weft needle SNL to the left side of the tape simultaneously with step cr),

e)

Stripping the weft loops formed in the preceding step from the two weft retainers SRHR, SHRL by a reed WB to the sheet stop BA and advancing the two weft retainers SRHR, SHRL away from the sheet stop BA,

f)

Striking the two weft threads SFR, SFL with the reed WB.

In steps cr) to e), the weft retainers SRHL, SRHR move slightly arcuately back and forth. In the forward movement - away from the sheet stop - the weft threads presented by the weft needles slide behind the oblique, upwardly directed hook tips down into the gusset of the hook weft retainer. During the backward movement, the weft retainers SRHL, SRHR retract. Also the weft needles SNL, SNR move back. The weft loops SFS hang on the hook. After the closure, the reed WB moves forward, wipes off the weft loops and pushes them against the leaf stop. (See also the Fig. 1 to 6 ).

If you greatly reduced the interior in the width M, so that it is only a narrow strip and at the same time the border areas RR, RL greatly increased, so there is a relation to the previously described band completely different looking band, the interior of which looks like a thickened bridge , In order to compensate for any stresses that may occur, however, one can weave different bonds in the regions, e.g. Canvas 1/1 in the margins and Panama 2/2 indoors. Such strips are advantageously also very economical to produce in larger overall widths.

Since those skilled in the main parts of a needle ribbon loom are known, has been omitted in the present description to further detailed explanations. The main parts of the webbing 2 according to the invention, warp threads KF and weft threads SFR and SFL are clearly visible.

The 4 to 6 now show a den Fig. 1 to 3 analog sequence of steps with the additional circumstance that in the method and apparatus shown here additionally a monofilament weft needle SNZ is shown, which is shown hatched for particular distinction.

In Fig. 6 attention is drawn in particular to the two shot reversal points SUL on the left side and SUR on the right side, which result from actuation of the shot retention devices SRHR and SRHL. Fig. 5 shows in the transition region from the inner region to the left edge region at the edge of the already finished woven material, a point ZZ, which should be exemplary for the supply of the additional thread SFZ. The feeder may be a heald or similar device.

Now follow the steps of the second Ausführurigsbeispiels a weaving method according to the invention using a Zusatzschussfadennadel for an additional weft yarn on the basis of 4 to 6 , so you can see in Fig. 4 the state of the weft needles in a status about a third penetrated into the compartment. Fig. 5 already shows the position of the weft needles after complete penetration of the shed in maximum extension / end position. Fig. 6 again shows the opposite maximum return position of the weft needles from the shed, the reed WB is already in motion in accordance with the adjacent arrow on the already finished fabric or the weft yarns in front of it, which are posted on the already finished material on the way. As a next step, the reed is moved away from the fence again, and the weft insertion starts again from the beginning, so that the situation soon presents itself as in Fig. 4 usf. Advantageously, here are the edge areas RL and RR only 4 to 8 warp threads "wide", just so wide that the additional thread from the outside, so the outer edge of the webbing is not perceived.

az)

Eintragen eines, vorzugsweise im Übergangsbereich vom Innenbereich M zum linken Randbereich RL, zugeführten Monofil-Schussfadens SFZ von links nach rechts bis zum Übergangsbereich vom Innenbereich M zum rechten Randbereich RR, mittels einer linken Zusatz-Schussnadel SNZ simultan zu Schritt ar),

bz)

Festhalten des Monofil-Schussfadens SFZ im Übergangsbereich vom Innenbereich M zum rechten Randbereich RR mittels des rechten Schussrückhalters SRHR simultan zu Schritt br),

cz)

Fangen des Monofil-Schussfadens SFZ mit dem rechten Schussrückhalter SRHR und Zurückfahren des rechten Schussrückhalters SRHR bis kurz vor den Blattanschlag BA simultan zu Schritt cr),

dz)

Zurückfahren der linken Zusatz-Schussnadel SNZ simultan zu Schritt dr).

In the manner just described, the advantageously further developed inventive method proceeds according to the following further steps:

az)

Inserting a monofilament weft SFZ, preferably in the transition region from the inner region M to the left edge region RL, from left to right to the transition region from the inner region M to the right edge region RR, by means of a left additional weft needle SNZ simultaneously to step ar),

bz)

Holding the monofilament weft SFZ in the transition region from the inner region M to the right edge region RR by means of the right weft retainer SRHR simultaneously to step br),

cz)

Catching the monofilament weft SFZ with the right weft retainer SRHR and retracting the right weft retainer SRHR until shortly before the sheet stop BA simultaneously with step cr),

dz)

Retracting the left additional weft needle SNZ simultaneously to step dr).

Of course, the embodiment of the inventive device and associated method described herein with left auxiliary weft needle SNZ is instead or at the same time also possible with right additional weft needle. It then results in a mirror image or symmetrical situation.

With a sufficiently large space in the compartment can advantageously also a variant with two additional weft needles - a right and a left - are used.

In the methods described so far, the weft retainers SRHL, SRHR move slightly arcuately back and forth. As the weft retainers move forwards - away from the sheet stop - the weft threads presented by the weft needles slide past the oblique, upwardly directed hook tips down into the gussets of the hooks (See Figures).

Fig. 7 shows by way of example highly schematic and only qualitatively illustrated a webbing 2, which opens at the sheet stop BA in a formed by warp threads KF compartment AC. A machine-fixed arranged hook-shaped curved needle, here a weft retainer SRH, is located near the area BA. The reed WB is about to move in the direction of the arrow ZBA, with the stripping and holding wire FSDr the weft threads SF in the in Fig. 8 shown position just before the sheet stop BA, wherein the stripping and retaining wire FSDr in the in Fig. 8 shown position of the reed WB the weft threads SF touches and on the way of the in Fig. 8 in the direction of the arrow ZBA moving reed bends elastically into the dashed position FSDr 'and thereby wipes the weft threads SF from the hook H of the weft retainer SRH when the reed strikes the weft yarn on the sheet stop BA (ie approximately simultaneously).

Fig. 9 shows the last-described situation greatly enlarged, in which case only one edge of the webbing according to the invention in connection with the inventive development of the present invention is shown. The already finished woven webbing 2 is in the lower part of the Fig. 9 to recognize. A selvedge should be represented by the right edge RR. It clearly recognizes the reed WB, to which a stripping and retaining wire FSDr attached and shown here partially cut, which presses the laid around the hook H of the weft retainer SRH weft loop SFS of the weft SF to the sheet stop BA. Here, the newly traveled movement of the reed is indicated by the arrow ZBA.

Only shown schematically is the reed WB in Fig. 10 seen from the front, with the line of sight according to the view Fig. 7 , there from left to right, corresponds. Good to see the arrangement of the stripping and retaining wire FSDr. It should be noted that the FIGS. 9 and 10 only cutouts for the right margin of the webbings, again stressing that the standards of Fig. 9 and from Fig. 10 do not correlate with each other.

Fig. 11 shows very highly schematic of the top view of a band 4, which is provided on both sides at the edges with picots or loop tufts 6. In Fig. 11 is marked in the warp direction according to the arrow K extending portion P, which is strongly pulled apart in Fig. 12 to describe in detail the weft guide of a right weft needle in this area. The weft retainers, as described in detail above in function and arrangement, are in the FIGS. 11 and 12 example arranged in the transversely arranged to the bandwidth positions A and B. The weft retainer in position A works like a weft retainer in the examples described above, namely within the two edges of the tape and serves to retain the weft thread SFR which has been introduced to the left by the right-hand weft needle (not shown), which thereby forms a weft thread loop in position A. which lies within the band. Compared to the embodiments described so far is in the band according to the FIGS. 11 and 12 in additional position, a second Schussrückhalter SRHL2 arranged in position B, which holds the (right) weft SFR, registered by the (right) weft needle, not shown here, until the weft needle has moved from the tray back to the right in the starting position and the reed WB, not shown here, is moved to the reed stop just before the end of the blanking period and thus the weft thread loop PS for the picot is fixed in the position B, thus protruding over the left edge of the strip 4.

For the procedure for the production of Picots 6 on the right edge of the tape is analogous to what has been said above for the left tape edge.

It is emphasized that the representation after Fig. 12 To simplify the overview, the left weft thread SFL, which is simultaneously entered from the left, is not displayed. In effect, the configuration of the weft thread SFR, which is only shown in qualitative terms, is understood to be compressed in the warp direction, so that it schematically represents only the Warp thread length range P, as in Fig. 11 shown occupies. It then results from the accumulation of a plurality of successively or adjacent weft loops Picots 6 and the Picotkante. 8

Fig. 13 schematically shows the two in the embodiments according to 11 and FIG. 12 used shot retainer, in the positions A: weft retainer SRHL and position B: weft retainer SRHL2, which lies outside of the web 4 to be woven. The shot retractors move according to the arrows VZ away from the sheet stop BA and there. The weft retainer SRHL2 is also operated in two positions Y (raised when no picots are made) and Z (lowered when picots are made).

If, in an advantageous embodiment of the invention, more than one double-weft thread per side is preferably entered at the same time partly into different compartments, then it is advantageous to precisely control the up and down movement of the weft retainers (analogously Fig. 13 , Positions B: Positions Y and Z). As a result, multiple weft loops can be caught more easily by the weft retainers.

Fig. 14 shows an inventive apparatus for performing a Varianta of the inventive method in which the two weft threads SFL and SFR of only one weft needle 28 (see Fig. 15 ) are introduced. The weft needle 28 has an eyelet 36 in the region of its needle tip 34, by means of which the first weft thread SFL is guided and inserted into the shed. A second (right) weft SFR is when retracting or retracting the weft needle 28 from the shed by means of a arranged in the needle tip 34 safety gear 42 with a hook 40, which can be placed in different rotational locking positions, captured and retracted into the shed.

Fig. 14 shows the position of - disproportionately enlarged here for reasons of simplification - weft needle 28 in which it has entered the left weft thread SFL in the shed. Here, the hook 40 has already passed the right weft SFR. A pusher 30 is provided to press now the weft SFR in the web, which the hook 40 on the way back of the weft needle 28 according to arrow RW (FIG. Fig. 16a and 16b ) takes. In this case, the right weft SFR is taken from the hook 40 ( Fig. 16a ) and from the weft needle 28 to beyond the left weft retainer SRHL led out until the hook 40 by touching and "run over" a machine-fixed stop 32 (FIG. Figs. 14, 16b and 16c ) against an in Fig. 15 As shown by way of example, detent spring 38 arranged in the weft needle 28 is rotated and thereby "loses" the right-hand weft SFR (FIG. Fig. 16b ). This completes an entry cycle. The next entry cycle begins with a forward movement of the weft needle 28 in the direction of the arrow VW in FIG Fig. 16c , wherein when "overrunning" the machine-fixed stop 32 ( Figs. 14, 16b and 16c ) - now in the opposite direction - the hook 40 is brought back into its catch position ".

sal)

Eintragen des linken Schussfadens (SFL) von der linken Bandseite aus in den linken Randbereich (RL) und den Innenbereich (M) mittels der Schussnadel (28),

sbl)

Festhalten des linken Schussfadens (SFL) im Übergangsbereich vom Innenbereich (M) zum rechten Randbereich (RR) mittels eines rechten Schussrückhalters (SRHR),

sr)

Fangen des rechten Schussfadens (SFR) mit der Fangvorrichtung (42),

sar)

Eintragen des rechten Schussfadens (SFR) von der rechten Bandseite aus in den rechten Randbereich (RR) und den Innenbereich (M) mittels der Schussnadel (28),

sbr)

Festhalten des rechten Schussfadens (SFR) im Übergangsbereich vom Innenbereich (M) zum linken Randbereich (RL) mittels eines linken Schussrückhalters (SRHL),

scr)

Fangen des rechten Schussfadens (SFR) mit dem linken Schussrückhalter (SRHL) und Zurückfahren des linken Schussrückhalters (SRHL) bis zum Blattanschlag (BA),

scl)

Fangen des linken Schussfadens (SFL) mit dem rechten Schussrückhalter (SRHR) und Zurückfahren des rechten Schussrückhalters (SRHR) bis zum Blattanschlag (BA), insbesondere simultan zu Schritt scr),

se)

Abstreifen der im vorhergehenden Schritt gebildeten Schussschlaufen von den beiden Schussrückhaltern (SRHR, SHRL) durch das Webblatt (WB) zum Blattanschlag (BA) und Vorwärtsbewegen der beiden Schussrückhalter (SRHR, SHRL) weg vom Blattanschlag (BA),

f)

Anschlagen der beiden Schussfäden (SFR, SFL) mit einem Webblatt (WB).

For example, with the device according to the Fig. 14 to 16c feasible method according to claim 22, for weaving a belt, in particular a belt with an inner region (M), a soft right edge region (RR) and a soft left edge region (RL) is characterized by the following repetitive step sequence:

sal)

Inserting the left weft thread (SFL) from the left side of the tape into the left edge region (RL) and the inner region (M) by means of the weft needle (28),

sbl)

Holding the left weft thread (SFL) in the transition region from the inner region (M) to the right edge region (RR) by means of a right weft retainer (SRHR),

sr)

Catching the right weft (SFR) with the safety gear (42),

sar)

Inserting the right weft thread (SFR) from the right side of the band into the right edge region (RR) and the inner region (M) by means of the weft needle (28),

sbr)

Holding the right weft thread (SFR) in the transition region from the inner region (M) to the left edge region (RL) by means of a left weft retainer (SRHL),

scr)

Catching the right weft (SFR) with the left weft retainer (SRHL) and retracting the left weft retainer (SRHL) to the sheet stop (BA),

scl)

Catching the left weft thread (SFL) with the right weft retainer (SRHR) and retracting the right weft retainer (SRHR) to the sheet stop (BA), in particular simultaneously to step scr),

se)

Stripping the weft loops formed in the preceding step from the two weft retainers (SRHR, SHRL) through the reed (WB) to the sheet stop (BA) and advancing the two weft retainers (SRHR, SHRL) away from the sheet stop (BA),

f)

Striking the two weft threads (SFR, SFL) with a reed (WB).

It is emphasized that the method according to the invention - as just described - can not only be performed with only one weft needle. In addition, variants with z. B. two double weft needles of the same or unequal length and the use of additional weft retainer and all combinations thereof possible. It is also obvious to the person skilled in the art that all edge formations known from the prior art can be produced by the method according to the invention.

In summary, it is again pointed out that due to the invention eliminates the previously constantly required catching threads and locking threads, and the equipment required for it. The invention results in a comparison with the prior art advantageously thinner band, which represents a very special progress especially with softer edge for comfort in the vehicle. In addition, the band according to the invention can be carried out more favorably than the prior art by eliminating process steps and components at the corresponding devices, as is possible in the prior art.

Furthermore, the present invention provides the advantage that the weft yarn tension can be substantially reduced and the wear, the number of weft yarn breaks and the weft yarn deflection points can be greatly reduced as a result. The required in the prior art vulnerable knitting needles and the associated linting advantageously eliminated due to the present invention.

REFERENCE NUMBERS

2

webbing

4

tape

6

Picot

22

tape

28

weft needle

30

handle

32

attack

34

pinpoint

36

eyelet

38

detent spring

40

hook

42

safety gear

A-C

shed

BA

reed

DS

arrow

FSDR

Stripping and holding wires

FSDR '

Stripping and holding wires

H

hook

KF

warp

L

in the circle left side

M

interior

P

Picotbereich

PS

Picot shot loop

R

in the circle right side

RR

right edge area

RL

left border area

SF

weft

SFR

right weft

SFL

left weft

SFS

Weft loop

SFZ

Additional weft

SNR

right weft needle

SNL

left weft needle

SNZ

left additional weft needle

SRHL

Shot retainer left

SRHL2

second weft retainer left

SRHR

Shot retainer right

SRHR2

second shot retainer right

SUL

Turning point on the left

SUR

Shot reversal point right

VZ

arrow

WB

reed

Y

Weft retainer position

Z

Weft retainer position

ZBA

arrow

Claims (16)

1. A method for weaving a webbing, comprising at least one first, right-hand weft thread (SFR) and at least one second, left-hand weft thread (SFL), characterized in that the two weft threads (SFL, SFR) are picked into the same shed from both sides of the webbing, are looped around weft grippers in weft reverse loops, are seized by the weft grippers substantially until shed change and are then shed from the weft grippers by the reed after shed change and are beat up against the stop.
2. The method as set forth in claim 1, characterized in that the two weft threads (SFL, SFR) are simultaneously picked into the same shed from both sides of the webbing.
3. The method as set forth in claim 2 for weaving a webbing, particularly a webbing comprising an inner portion (M), a soft right-hand edge portion (RR) and a soft left-hand edge portion (RL), characterized by the following continually repeated first step sequence:

   ar) picking the right-hand weft thread (SFR) from the right-hand side of the web into the right-hand edge portion (RR) and into the inner portion (M) by means of a right-hand weft needle (SNR),

   al) picking the left-hand weft thread (SFL) from the left-hand side into the left-hand edge portion (RL) and into the inner portion (M) by means of a left-hand weft needle (SNL),simultaneously to step ar),

   br) seizing the right-hand weft thread (SFR) in the transition portion from the inner portion (M) to the left-hand edge portion (RL) by means of a left-hand weft gripper (SRHL),

   bl) seizing the left-hand weft thread (SFL) in the transition portion from the inner portion (M) to the right-hand edge portion (RR) by means of a right-hand weft gripper (SRHR), simultaneously to step br),

   cr) catching the right-hand weft thread (SFR) with the left-hand weft gripper (SRHL) and retracting the left-hand weft gripper (SRHL) to the reed stop (BA),

   cl) catching the left-hand weft thread (SFL) with the right-hand weft gripper (SRHR) and retracting the right-hand weft gripper (SRHR) to the reed stop (BA), simultaneously to step cr)

   dr) retracting the right-hand weft needle (SNR) to the right-hand side of the web,

   dl) retracting the left-hand weft needle (SNL) to the left-hand side of the web, simultaneously to step cr),

   e) shedding the weft loops formed in the previous step from the two weft grippers (SRHR, SRHL) by the reed (WB) to the reed stop (BA) and forwarding the two weft grippers (SRHR, SRHL) away from the reed stop (BA),

   f) beating up the two weft threads (SFR, SFL) with a reed (WB).
4. The method for producing a webbing whose right-hand and left-hand weft threads are hybrid threads, as set forth in claim 3, characterized by weaving being followed by the step:

   g) thermosetting the web.
5. The method as set forth in claim 3 or 4, characterized by the following further steps:

   az) picking a monofil weft thread (SFZ) fed preferably in the transition portion from the inner portion (M) to the left-hand edge portion (RL) from left to right up to the transition portion from the inner portion (M) to the right-hand edge portion (RR) by means of a left-hand additional weft needle (SNZ), simultaneously to step ar),

   bz) seizing the monofil weft thread (SFZ) in the transition portion from the inner portion (M) to the right-hand edge portion (RR) by means of the right-hand weft gripper (SRHR), simultaneously to step br),

   cz) catching the monofil weft thread (SFZ) with the right-hand weft gripper (SRHR) and retracting the right-hand weft gripper (SRHR) up to the reed stop (BA), simultaneously to step cr),

   dz) retracting the left-hand additional weft needle (SNZ), simultaneously to step dr).
6. The method for weaving a web as set forth in claim 3, characterized by the following step sequence optionally alternating with the first step sequence for optionally forming picots at the outer edges of the webbing:

   apr) picking the right-hand weft thread (SFR) from the right-hand side of the web over the full width of the webbing beyond the left-hand webbing side by means of a right-hand weft needle (SNR),

   apl) picking the left-hand weft thread (SFL) from the left-hand side of the web over the full width of the webbing beyond the right-hand webbing side by means of a left-hand weft needle (SNL), simultaneously to step apr),

   bpr) seizing the right-hand weft thread (SFR) outside of the webbing alongside the left-hand edge portion (RL) by means of a second left-hand weft gripper (SRHL2) and forming weft loops,

   bpl) seizing the left-hand weft thread (SFL) outside of the webbing alongside the right-hand edge portion (RR) by means of a second right-hand weft gripper (SRHR2) and forming weft loops, simultaneously to step bpr),

   dr) retracting the right-hand weft needle (SNR) to the right-hand side of the web,

   dl) retracting the left-hand weft needle (SNL) to the left-hand side of the web, simultaneously to step dr)

   ep) shedding the weft loops formed in the steps bpr) and bpl) from the two weft grippers (SRHR2, SRHL2),

   f) beating up the two weft threads (SFR, SFL) with a reed (WB).
7. The method for producing a webbing whose right-hand and left-hand weft threads are hybrid threads, as set forth in claim 6, characterized by weaving being followed by the step:

   g) thermosetting the web.
8. The method as set forth in any of the preceding claims, characterized in that elastic warp threads are included.
9. A web for seat belts comprising an inner portion (M), a right-hand edge portion (RR) softer as compared to the inner portion (M) and a left-hand edge portion (RL) softer as compared to the inner portion (M), including a right-hand weft thread (SFR) and a left-hand weft thread (SFL), characterized in that the right-hand weft thread (SFR) is located only in the inner portion (M) and in the right-hand edge portion (RR) and the left-hand weft thread (SFL) is located only in the inner portion (M) and in the left-hand edge portion (RL).
10. The web as set forth in claim 9, characterized in that the right-hand weft thread (SFR) and the left-hand weft thread (SFL) is a multifil thread.
11. The web as set forth in claim 9 or 10, characterized in that the right-hand weft thread (SFR) and the left-hand weft thread (SFL) is a hybrid thread.
12. The web as set forth in any of the claims 9 to 11, characterized in that an additional monofil weft thread (SFZ) is located in the inner portion (M).
13. The method as set forth in claim 1, characterized in that the two weft threads (SFL, SFR) are picked by just one weft needle (28), a first left-hand weft thread (SFL) being guided and picked through an eye (36) arranged in the region of the tip (34) of the weft needle (28) on entry thereof into the shed and a second right-hand weft thread (SFR) is catched by means of a catcher (42) arranged in the tip (34) of the weft needle (28) on retraction thereof from the shed and entered into the shed.
14. The method as set forth in claim 13 for weaving a web, particularly a seatbelt having an inner portion (M), a soft right-hand edge portion (RR) and a soft left-hand edge portion (RL), characterized by the following continually repeated step sequence:

    sal) picking the left-hand weft thread (SFL) from the left-hand side into the left-hand edge portion (RL) and into the inner portion (M) by means of the weft needle (28),

    sbl) seizing the left-hand weft thread (SFL) in the transition portion from the inner portion (M) to the right-hand edge portion (RR) by means of a right-hand weft gripper (SRHR),

    sr) catching the right-hand weft thread (SFR) with the catcher (42),

    sar) picking the right-hand weft thread (SFR) from the right-hand side into the right-hand edge portion (RR) and into the inner portion (M) by means of the weft needle (28),

    sbr) seizing the right-hand weft thread (SFR) in the transition portion from the inner portion (M) to the left-hand edge portion (RL) by means of a left-hand weft gripper (SRHL),

    scr) catching the right-hand weft thread (SFR) with the left-hand weft gripper (SRHL) and retracting the left-hand weft gripper (SRHL) up to the reed stop (BA),

    scl) catching the left-hand weft thread (SFL) with the right-hand weft gripper (SRHR) and retracting the left-hand weft gripper (SRHL) up to the reed stop (BA), particularly simultaneously to step scr),

    se) shedding the weft loops formed in the previous step from the two weft grippers (SRHR, SHRL) by the reed (WB) to the reed stop (BA) and forwarding the two weft grippers (SRHR, SRHL) away from the reed stop (BA),

    f) beating up the two weft threads (SFR, SFL) with a reed (WB).
15. The method for producing a web whose right-hand and left-hand weft threads are hybrid threads as set forth in claim 14, characterized by weaving being followed by the step:

    g) thermosetting the web.
16. The method as set forth in any of the preceding claims 1 - 8 and 13 - 15, characterized in that elastic warp threads are included.

Images