EP1240373B1 - Ribbon and method for production thereof - Google Patents

Abstract

A method and a device for the production of a ribbon are provided. The method may be performed on a narrow fabric needle loom and may include repeating the following steps: picking a weft thread ( 4 ), with (only) one weft needle ( 1 ); meshing the weft thread ( 4 ), with a catch thread ( 5 ), delivered from the side opposite the weft side (weft exit side), by a knitting needle ( 2 ) working on the weft exit side; returning the weft needle ( 1 ) and wrapping the weft thread ( 4 ), with a catch thread ( 6 ), delivered from the weft side by a knitting needle working on the weft side. The device may include a narrow fabric needle looms, for production of a ribbon, in particular by the above method. A webbing is also provided that may be produced from the above method.

Description

The invention relates to a method for producing a tape on a needle loom with a weft needle and a device on a needle loom for Implementation of the method, as well as a band produced therewith.

Numerous methods and devices for producing tapes are known. you used machines with a weft needle or with two in the same direction or in opposite directions working weft needles to produce narrow fabric. In general, that has scored Band two different looking edges, namely on the Einschußseite or at the Einschubseite opposite opposite side. This is usually not desired. There were Therefore, with varying success made many efforts to different made edges look the same. The actual edge constructions of the but one and the other side of the band also differ in that they have a different Wear behavior have.

From CH 598 382 A5 a process for the production of narrow fabrics with im essentially on both sides of the same edges known, in which the weft itself crocheted becomes. Preferably, a method variant is disclosed in which an auxiliary thread with the weft thread on one or both sides of the fabric is crocheted. One on the one in this one Patent described manner manufactured tape has undesirable application Band edges that result from the crocheting of the weft.

In EP 0 034 104 B1 a method for producing a narrow fabric with a Fixed edge or a Barmer bow described. In this method one uses a single weft needle, which moves across and for each stop after both Directions enters a single shot, where you periodically and alternately using the weft needle at least one, with the other not aligned warp in the middle of the open tray over one or the other edge of Kettfadenfaches pulls, where you alternately on one or the other edge once the weft and periodically the The warp thread can be worked along each edge with a needle, and with the one outwards drawn and tied with the edge warp thread releases as soon as the weft needle and moves the weft crosswise in the opposite direction. This procedure is extremely complicated and not suitable for the production of a webbing.

There are also used in US vehicles webbings known on the weft entry side Although a catch thread and thus possibly have a soft edge, on the However, on the opposite side have outwardly facing hard Monofilschußumkehrstellen. The The improvement already made was that of distinguishing ones Marked edges by a color-contrasting warp, so that when installing this Gurtbandes the hard side could be oriented so that the neck of the occupant Vehicle always showed the soft edge. This procedure is because of the high possibility of errors on the one hand impractical and on the other hand also dangerous.

It is an object of the invention to provide a method and apparatus for making a To propose tape with monofilament weft, which has soft and supple edges.

The object is achieved firstly with a method according to claim 1. By the sequence of method steps a) entering a weft thread with a weft needle, b) looping the weft yarn with one of the Einschußseite opposite side (weft exit side) supplied fishing thread by means of a working on the weft exit side Knitting needle, c) retracting the weft needle and d) looping the weft thread with a supplied from the Einschußseite catch thread by means of working on the Einschußseite knitting needle, which is used as a weft monofilament or a combination of multifilament and monofilament, and wherein the catch thread in step b ) and d) is meshed at the weft exit side and / or on the Einschußseite with a locking thread, wherein at least on one hinge side (shot entry side and / or shot exit side) between the warp threads, without wrapping the weft material, only in conjunction with the Ma legs of the fishing line or a connection with the mesh legs in detail, and the course - in the finished band to the warp threads substantially parallel lying - additional threads are woven, which are not wrapped by the weft, the respective barrier thread of the respective knitting needle is presented such that it respectively At the edge of the tape comes to rest completely outside the additional threads, it is possible to produce a narrow fabric with a weft needle, which has substantially the same appearance on both selvedges. As a result, an even softer, the weft reversal points of the "hard" monofilament covering edge can be achieved. The handling comfort of such a tape is again higher than conventional tapes.

In execution of the method according to the invention is a monofilament weft than used. A belt woven by this method contains substantially inelastic Warp threads and is intended for car safety harnesses. It has the required high permanent transverse stiffness or a high elasticity of elasticity across the band and has despite the hard shot reversal soft edges. The soft edges are on both Band edges formed by the effective mesh of the fishing threads. Advantageously, for the fishing threads selected a (multifiles) yarn that has the same or a higher yarn count than the monofilament weft has The advantage thus gained is that with the Fangfäden the monofilament weft thread can be well covered. The hard shot reversals of the monofilament are covered by a multifilament fishing thread soft covered. The tape is easy to handle and despite the desired high transverse stiffness Soft at the edges and has, since only monofilament is used as a weft, at high transverse stiffness a very small strip thickness. By the solid weave according to the invention results in a space-saving tape with a high abrasion resistance.

According to the method of the invention are to increase the mesh safety preferably the knit mesh primarily on the weft exit side but also on the opposite side (Weft entry side) crocheted with a barrier thread. This is the barrier thread advantageously presented so that it is not detected by the weft. In addition to the mesh safety gives the bast an additional protection of the weft reversal loops. at this procedure, one chooses a thinner fishing thread and a thicker barrier thread to to increase the protective effect.

In a further advantageous embodiment of the method according to the invention is the weft inserted two or more times. This gives the additional advantage that then, of course, consisting of somewhat thinner single monofilament wefts Weft in the field of shot reversal points is more flexible and less applies.

An equally advantageous development of the method according to the invention is that for the fishing threads and / or the barrier threads and / or the additional threads substantially full Shredded yarns are used. It can thereby be an even smoother edge shape achieve, in which almost any rising of the band edge is avoided.

The term "monofilament threads" chosen to simplify the formulation includes both "true" monofilaments consisting of a single capillary, as well as "monofilament" multifilaments, ie filaments consisting of such compactly guided individual capillaries that they, although they are actually multifilaments, properties such. B. spring elasticity, stiffness, have low fluffiness typical of monofilament threads.

Further advantages and features of the invention will become apparent from the dependent claims.

Fig. 1

zeigt stark vereinfacht schematisch einen Ausschnitt eines nach dem erfindungsgemäßen Verfahren gewebten Bandes mit Fangfadenmaschenreihen, sowie Schußnadel und Wirknadeln, wobei die hier zur Darstellung nicht erforderlichen Kettfäden aus Gründen der Übersicht nicht dargestellt sind.

Fig. 2

zeigt stark vereinfacht schematisch einen Ausschnitt eines nach einer Weiterbildung des erfindungsgemäßen Verfahrens gewebten Bandes mit Fang-/Sperrfadenmaschenreihen, sowie Schußnadel und Wirknadeln.

Fig. 3

zeigt ein Band nach Fig. 2, wobei jeweils zwischen der Wirkmaschenreihe und äußersten Kettfäden Zusatzfäden, die nur mit den "Füßen" der Fangfadenmaschen verkreuzen, eingewebt sind, dargestellt sind.

Fig. 4

zeigt stark vereinfacht schematisch einen Ausschnitt der rechten Seite eines Bandes während des Webprozesses, wobei die Lage der rechten Wirknadel im Verhältnis zu dem Schußfaden, dem Fangfaden, dem Sperrfaden und den Zusatzfäden auf dem Weg nach vorne dargestellt wird.

For a better understanding of the invention, it will be described briefly below with reference to embodiments with the aid of a drawing.

Fig. 1

shows greatly simplified schematically a section of a woven according to the method of the invention with Fangfadenmaschenreihen, as well as weft needle and knitting needles, which are not shown here for illustration warp threads for reasons of clarity not shown.

Fig. 2

shows greatly simplified schematically a section of a woven according to a development of the method according to the invention tape with Fang- / Sperrfadenmaschenreihen, as well as weft needle and knitting needles.

Fig. 3

shows a band according to Fig. 2, wherein in each case between the knitting stitch row and outermost warp threads additional threads, which are interlaced only with the "feet" of the Fangfadenmaschen woven are shown are shown.

Fig. 4

schematically shows a section of the right side of a band during the weaving process, wherein the position of the right knitting needle in relation to the weft thread, the fishing thread, the blocking thread and the additional threads is shown on the way forward.

Fig. 1 shows a greatly simplified schematic section of a according to the invention Method of woven tape with Fangfadenchenchenhen, as well as weft needle 1 and Punctures 2 and 3. In the illustration of the drawing are the (not shown here) Warp threads from bottom to top in a warp thread area marked with a double arrow K. The left and right of Kettfadenbereichs K Fangfadenmaschen are compared to the area K shown extremely oversized to the course of the meshing to show the fishing threads. Note that the representation is not to scale. In fact, the area K is many times wider than shown here.

On the left side in Fig. 1, a head of a broken shot needle 1 is shown recognize that leads in a loop a weft thread 4. The position shown here Weft needle 1 is the position in which the weft needle on the Einschußseite approximately in Dead center is located, to reverse towards the center of the image in the direction of the opposite side. The of Weft thread 4 entered to the left is inserted with a right-hand thread 5 from a meshed knitting needle 2 arranged on the right side of the loom. One on the knitting needle arranged on the left side waits over the weft thread 4 and wraps it around the left fishing thread 6. The fishing threads 5 and 6 are known to the skilled person (not shown) Fangfadeneinlegern controlled. The device according to the invention, suitable for Implementation of the method according to the invention, is designed such that all Movements of the left knitting needle 3 and the left (not shown) Fangfadeneinlegers regardless of the corresponding elements on the right side (knitting needle 2 and Right Fangfadeneinleger) are individually controllable.

The orientation terms selected here are "right", "left", "front" and "rear" always on an area from the perspective of one standing in front of the needle loom Observers. Likewise, the entire arrangement and procedure could be reversed (right / left) be arranged or expire.

In an advantageous embodiment of the invention are preferably multifile fishing and Locking threads and a monofilament weft inserted. The warp threads are preferably also made of multifilament material. This can be with the inventive device a excellent band, especially webbing manufacture, all of a good, comfortable Band has required properties, namely, soft, equal-looking selvedges and at the same time a high transverse rigidity in the band.

Fig. 2 shows a greatly simplified schematic section of a according to a development of the Method according to the invention woven tape B with a left from fishing and Sperrfadenmaschen existing course, consisting of a left fishing thread 6 and a left (dashed lines) blocking thread 8 are formed, wherein the left fishing thread 6 the Weft 4 wraps around, the left-hand locking thread 8, however, with the left fishing thread. 6 meshed is that it comes to rest outside the weft reversal points of the weft thread 4. Of the warp thread KF located in the designated K, is for reasons the clarity shown on both sides of the tape only the first pair of 10 and 9, where the solid passages of the lines respectively the overhead warp threads 10, 9 and the dashed passages of the lines to represent the underlying warp threads 10, 9. Good to It can be seen that the left weft reversal loops have a larger radius than the Right. The location of the right barrier thread 7 and the right-hand thread 5 is analogous to Situation on the left side.

Fig. 3 shows a section of a band B of FIG. 2, wherein in each case between the Wirkmaschenreihe and outermost warp threads 10 and 9 additional threads 12 and 11, which only with the Cross "feet" of the thread mesh, are woven, are shown. The inserted Additional threads 12 and 11 cover the reversal points of the weft thread 4 to the band edge out and thus protect the band edge outward from the (comparatively hard) monofilament Weft 4 excellent.

Fig. 4 shows a greatly simplified schematic section of the right side of a band B. during the weaving process, wherein the position of the right knitting needle 2 in relation to the Weft 4, the right-hand catching thread 5, the right-hand blocking thread 7 and the additional threads 11 is presented on the way forward. The right knitting needle 2 has the (not shown) Fangfadeneinleger (not shown) so-called. Schuß triangle presented Fangfaden 5 and just pulls the fishing thread 5, taking the weft yarn 4 forward, wherein the knitting needle 2, here a latch needle, with the tongue open between those around one Angle a open additional threads 11 passes through, without the additional threads 1 to grab. After passage of the additional threads 11, the knitting needle 2 attacks that of a (not shown) Sperrfadeneinleger submitted blocking thread 7 and pulls this after closing the tongue 21st together with the catching thread 5 through an "old" stitch 13 lying on the knitting needle 2. Thereafter, the knitting needle 2 returns to the front dead center and moves backwards for making a new stitch. Before passing the additional threads 11 through the knitting needle 2, these are crossed, so that the previously (FIG. 4) overhead additional thread 11A is now below (not shown) and the previously (Fig. 4) underlying additional thread 11B now above (not shown).

Because the (in particular two used on each mesh side) additional threads as additional Protection used for the reversal points of the weft, these threads are not allowed be included by the weft. This is achieved in that the additional threads through additional inserts (not shown) by levers (not shown) that control their movement either from a (not shown) shaft, which is used only for this function or by a (not shown) pivotable shaft, their movement through a (not shown) crank or (not shown) cam receives introduced into the tissue become. The additional depositors have - as known elements, the z. B. as a thread feeder work - at its front end a hole, which serves to receive the thread.

The additional depositors, preferably in pairs, alternately one high / one deep, im Clock of the weaving machine are positioned so that the additional threads outside the Webfaches after catching the fishing thread, of the respective knitting needle over-or underscore (see Fig. 4). The process just described recovers, with the band sketched in Fig. 3 is woven.

The inventive method is both for the production of a simple band as well especially suitable for the production of a belt for safety belt systems.

The inventive method is - using elastic or rubber-elastic Warp and / or weft threads - also advantageous for producing elastic or rubber-elastic Tapes, for example for use in the manufacture of clothing, Laundry items and especially underwear suitable.

REFERENCE NUMBERS

1

pick needle

2

right knitting needle

3

left knitting needle

4

weft

5

right catch thread

6

left catcher

7

right barrier thread

8th

left barrier thread

9

extreme right-hand warp threads

10

extreme left warp threads

11

right additional threads

11 A

right additional thread

11B

right additional thread

12

left additional threads

13

right "old" mesh

21

right needle tongue

B

tape

K

Kettfadenbereich

KF

warp

Claims (10)

1. A method of producing webbing including warp threads and a weft thread on a narrow fabric needle weaving machine, more particularly a belt webbing for seat belt systems, comprising the following repeat sequence of steps in the method:

   a) picking a weft thread (4) with a single pick needle (1),

   b) wrapping the weft thread (4) with a tuck thread (5) furnished from the weft exit side lying opposite the pick side by means of a knitting needle (2) working at the weft exit side,

   c) retracting the pick needle (1)

   d) wrapping the weft thread (4) with a tuck thread (6) furnished at the pick side by means of a knitting needle (3) working at the pick side,

   characterized in that

   a monofil thread or a combination of multifil threads and monofil threads is used as the weft thread (4) and

   the tuck thread (5, 6) in step b) and d) is looped with a blocking thread (7, 8) at the weft exit side and at the pick side,

   at the weft entry side and/or weft exit side between the warp threads (KF) with no wrapping of the weft material linking only the legs of the loops of the tuck thread (5, 6), and the loop course, additional threads (11, 12) are woven in substantially located in parallel to the warp threads (KF) in the finished webbing (B),

   each blocking thread (7, 8) of each knitting needle (2, 3) is presented such that it comes to rest totally outside of the additional threads (12, 11).
2. The method as set forth in claim 1, characterized in that the weft thread is picked doubled or multipled.
3. The method as set forth in claim 1 or 2, characterized in that substantially fully-shrunk yarns are used for the tuck threads and/or the blocking threads and/or the additional threads.
4. The method as set forth in claim 1, 2 or 3, characterized in that for the tuck threads (5, 6) a yarn is selected having a dtex the same or higher than that of the weft thread.
5. The method as set forth in claim 1, 2 or 3, characterized in that for the blocking threads (7, 8) a yam is selected having a dtex the same or higher than that of the tuck threads (5, 6).
6. A device for use on a needle web machine for weaving webbing, more particularly in accordance with a method as set forth in any of the preceding claims, comprising

   a pick needle (1),

   at the weft entry side and weft exit side respectively,

   a knitting needle (2,3), suitable for looping a tuck thread and a blocking thread,

   a tucker,

   characterized by it further comprising

   additional thread inserters working at the weft entry side and/or weft exit side between tucker and blocking thread inserter.
7. The device as set forth in claim 6, characterized that it comprises a blocking thread inserter.
8. Webbing including weft threads and a warp thread, comprising

   tuck threads looped to the weft threads on both sides,

   at the weft entry side and/or weft exit side between the warp threads (KF) and the loop course, additional threads (11, 12) substantially located in parallel to the warp threads (KF) with no wrapping of the weft material in the webbing and linking only the legs of the loops of the tuck thread (5, 6),

   blocking threads (7, 8) located totally outside of the additional threads (12, 11 ),

   characterized by it being woven in accordance with any of the claims 1 to 5.
9. The webbing as set forth in claim 8, characterized by it being a belt webbing, more particularly for a seat belt system and including substantially inelastic warp threads.
10. The webbing as set forth in claim 8 or 9, characterized by it including warp threads and/or additional threads (11) and/or tuck threads (5, 6) and/or blocking threads (7, 8) of PTFE or coated with PTFE.

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