WO2019025043A1

WO2019025043A1 - Circular weaving machine

Info

Publication number: WO2019025043A1
Application number: PCT/EP2018/061966
Authority: WO
Inventors: Reinhold Hehenberger; Philipp HEHENBERGER
Original assignee: Reinhold Hehenberger
Priority date: 2017-08-01
Filing date: 2018-05-09
Publication date: 2019-02-07
Also published as: BR112020001587A2; CN110997997B; EP3662100A1; CN110997997A; EP3662100B1

Abstract

The invention relates to a circular weaving machine (1), comprising a main axis (2e), a reed (2), a warp-band supply device (3a) for supplying warp bands (4), a weaving shuttle (12) circulating along the reed (2), wherein for guiding the weaving shuttle (12), the reed (2) is provided with the following: An upper reed ring (2a); a lower reed ring (2b); a plurality of reed rods (2f) connecting the upper reed ring (2a) to the lower reed ring (2b), between which interspaces (2g) for the passage of warp bands (4) are formed; an upper running surface (18) for two upper rollers (19; 19a; 19b) of the weaving shuttle; a lower running surface (20) for two lower rollers (21; 21a; 21b) of the weaving shuttle; upper warp band passage openings (25) and lower warp band passage openings (26) so that during the circulation of the weaving shuttle (12) along the reed (2), the two upper rollers (19; 19a; 19b) and the two lower rollers (21; 21a; 21b) do not come into contact with the warp bands, wherein the weaving shuttle (12) is provided with the following: A frame (30) having an upper longitudinal side (30a) and a lower longitudinal side (30b); a first upper roller (19a) and a second upper roller (19b) for rolling off at the upper running surface (18) of the reed (2); a first lower roller (21a) and a second lower roller (21b) for rolling off at the lower running surface (20) of the reed (2); at least two wheels (23, 24) for rolling off on a substantially vertical roll-off surface (2h) of the reed (2), wherein the first upper roller (19a) and the second upper roller (19b), and the first lower roller (21a) and the second lower roller (21b) are each arranged between the at least two wheels (23, 24; 23a, 23b; 24a, 24b), as viewed, in each case, in the longitudinal direction of the weaving shuttle (12).

Description

circular loom

The invention relates to a circular loom, comprising

a main axis,

- a reed,

a warp tape feeder for feeding

warp bobbins,

a shuttle around the reed, with the reed guiding the shuttle

- an upper ring ring,

- a bottom ring,

- a variety of the upper ring ring with the bottom

Rietring connecting reed rods, between which

Intermediate spaces are formed for the passage of warp strips,

an upper tread for two upper rollers of the shuttle,

a lower tread for two lower rollers of the

Shuttle,

- Upper Kettbändchen-passage openings, which the

Continue between the spaces between the reed rods starting from the upper tread and

- Lower Kettbändchen-passage openings, which the

Continue the spaces between the reed bars from the lower tread down so that the two upper rollers and the two lower rollers of the shuttle do not contact the warp bands as the shuttle travels along the reed.

Round looms have long been known in the art. For example, EP 0 786 026 B1 describes a

generic circular loom, in which a plurality of shooters in the so-called weaving or traveling compartment between two sets of warp strips on a horizontal circular path

circulates. The shooters carry rounds, of which

Schussbändchen be delivered to the fabric edge of the tube fabric produced. The tubular fabric can then be pulled up or down and made into a flat tubular fabric

be merged. In common looms, the shuttle has a greater length (in the direction of travel) than the compartment opened by the system, thereby forcing the shuttle to open the compartment upon entry, or to keep the compartment open even further when it exits. The disadvantage of this is the considerable frictional forces on the warp when entering the shooter in the shed. Likewise, the warp straps are heavily stressed by friction when the shooter emerges from the already closing shed (and by the abrupt change in the following compartment). In modern circular looms high shot numbers of, for example, 1200 rounds per minute (when using six shooters with 200 revolutions per minute) and

Revolving speeds of up to 13 meters per second

achieved. This results in enormous burdens for the

Kettbändchen, which in particular can cause splitting of fibers at the edges. Such protruding fibers may get into the web of the weaver, which may cause weaving defects in the loom. As a result, can

Looms today almost exclusively only with

Warp tape lubrication (wetting with water-thinned

soap-like solution for friction reduction) are operated. Due to the considerable moving masses is a

Immediate shutdown of the circular loom upon detection of such an error case not readily possible.

To solve this problem, a circular loom is already known from EP 0 253 799 A2, in which the warp tapes are countersunk relative to the respective running surfaces so that contact between warp tapes and runners of the contactor is avoided. In this prior art races are provided with obliquely inwardly inclined guide surfaces for four arranged at 45 ° - wheels of the shuttle. As a result, the guide surfaces can intersect at the races

Fadenführungsnuten be created in which the warp threads can be added. Disadvantageously, therefore

extensive adjustments of both the running or Rietringe and the weaver required to provide sufficient space for the Fadenführungsnuten at a given height of Riets. The execution of the weaver with four oblique

Asked roles also causes no stable circular motion of the Protect, so that an expansion of the rollers of the shuttle had to be provided on inner edges of the races. However, this will cause significant wear

Impellers / rolls caused, so that this state of the

Technology has proven not practicable.

In the prior art, numerous designs of circular looms are also known, in which the warp tapes are overwhelmed by the roles of the weaver. The CN 2 575 123 Y describes such a circular loom. Although the upper and lower ends of the reed rods are spaced apart. However, this is only the attachment of the Rietstäbe to the rings, so that the roles of the weaver on the

Kettbändchen be led. In this prior art, although the standing rollers between the horizontal wheels

arranged. However, this arrangement may be different than in the

Invention can not be used to make the web shooters narrower and shorter to allow the sinking of the warp tapes without redesigning the Rietaußenabmessungen.

Furthermore, at CN 2 575 123 Y is a head start on the

Rietstäben provided that should keep the shooter in Riet as in EP 0253799 A2. The grinding of the wheels on this projection thus leads to increased wear of the wheels and the Riet-projection. The total resulting game

between shooter and reed increases the likelihood of malfunction and defects. Although a conversion of the Riets by the externally mounted Rietstäbe would be possible, but very

consuming. Furthermore, provided in this embodiment interchangeability of the Rietstäbe has the disadvantage that

Weblog impact negatively on the reed's stability.

EP 0 396 407 A1 discloses a different circular loom in which, although a compact shuttle, especially with only horizontal wheels, is created, but for a lever from the shuttle in the direction of the central axis must be carried away, at the inside end of a central

Roller bearing is provided. Thus, in this prior art, a narrow shuttle can be achieved only by an inside abutment. This is, however, out

various reasons (such as energy consumption, wear, Stability, running safety, etc.) are very disadvantageous, which is why such a solution has proven to be less practical. The high ratio of the height to the radial strength of the Rietstäbe in this embodiment is also very susceptible to vibration and associated with increased noise during operation.

In CN 2 808 949 Y, TW M 516 054 U and CN 203 947 253 U there are shown various designs of weavers, which are however not designed with a view to enabling the sinking of the warp tapes without redesigning the reed. Moreover, these statements would not be suitable.

In contrast, the object of the present invention is to alleviate or eliminate at least individual disadvantages of the prior art. The invention is

in particular with the aim of designing a circular loom with structurally simple means in such a way that the rolling over of the warp strips with as little adaptation as possible to the reed,

especially with the least possible adjustments to the

Rietaußenabmessungen is prevented.

This object is achieved by a circular loom with the features of claim 1. Preferred embodiments are given in the dependent claims.

In the weaver of the circular loom according to the invention it is provided that

- The at least two wheels in the longitudinal direction of the frame

seen arranged at opposite ends of the frame, wherein

- The first and the second upper roller and the first and the second lower roller are each seen in the longitudinal direction of the frame between the at least two wheels arranged.

By the inside arrangement of the (standing) rollers and the outside arrangement of the (lying) wheels in

according to the invention (in each case based on the longitudinal direction), the frame (also referred to as shooter body) advantageously be made much narrower and shorter. This has the effect that at a given height of Riets above and below the shuttle sufficient space for the formation of the upper and lower Kettbändchen- passage openings is created. In contrast to the prior art of EP 0 253 799 A2, no fundamental redesign of the reed, in particular the reed outer dimensions, is required for this. Thus, the benefits of sinking the

Kettbändchen be used in the upper and lower Kettbändchen- passageways when circulating the shuttle in a simple way without having to make significant adjustments to the reed itself. Advantageously, in particular a lower ratio of height to the radial strength of the reed rods can be provided, which has improved stability against the centripetal force of the

Protect causes and thus less susceptible to vibration and is associated with less noise during operation.

The design of the weaver also brings with it the advantage that the weaver must make a lesser or no contribution to the complete opening of the shed in its circulation. Advantageously, the shed during the passage of the shuttle can be opened beyond the shooter width. A Kettbändachennachschwingung after the shooter has left the tray can thus also be largely avoided. In conventional systems (EP 0 786 026 B1), the shooter causes, by virtue of its shape, a compartment opening beyond the height prescribed by the strands and thus an increased warp tension. This warp tension will be after

Leaving the shooter abruptly dismantled from the subject, which leads to Kettbändachennachschwingungen and disturbs the following shedding. In addition, the control of the shed can be facilitated. The lower friction considerably reduces the splicing tendency of the warp tapes. The softer treatment of the warp threads in the weaving process ultimately allows thinner warp tapes to be used, resulting in lighter fabric

results.

In the hitherto customary embodiment of the shuttle, the (conical) rollers which roll on the ring ring project slightly beyond the frame of the frame, for example about 4 mm above and below

Shuttle. Therefore, a wiper outside and in full width surrounding the shuttle is required to one hand the Ribbon to protect the abrasion over the rollers and

on the other hand, to transfer the tapes from a standing to a lying position so that the rollers do not kink or fold the tapes. By both sides inwardly shifted roles of the frame (shooter body) can advantageously be made much narrower. Furthermore, depending on the design, it may be possible to dispense with a guard rail or to provide a simpler guard rail. conventional

Systems with Schützenbügel have the disadvantage that they by pressing the Kettbändchen of the shooter roles to the

Rietlauffläche this Einklemmbereich cut in the radial direction. This wear has a negative effect on the roller wear of the shooter and leads to vibration and increased noise during operation. Another advantage of the execution without a stalk is based on the lower

Heat build-up because the warp ribbons are not deflected, twisted, and spliced by the shuttle guard as in the prior art (see, e.g., EP 0 786 026 B1).

Advantageously, the warp ribbons in the upper and lower warp passage apertures may be received above and below the upper and lower treads of the reed, respectively, so that the upper and lower (standing) rolls do not interfere with the warp tapes as the shuttle loops along the reed Contact us. Accordingly, the one set of warp tapes upon entry of the shuttle into the upper Kettbändchen- passage openings above the upper tread and the other crowd of warp in the lower Kettbändchen- passage openings below the lower tread

arranged. Accordingly, the reed is designed so that the

Flocks of warp while moving the shuttle through the shed of the upper and lower rollers are not rolled over. As a result, on the one hand the upper and lower rollers are spared. In addition, damage to the warp is prevented. Advantageously, so Webfehler and

Collisions are significantly reduced by splits.

Furthermore, dust, strength and

Strain losses are reduced. By reducing the loads further lighter fabrics can be produced. Finally, splice-susceptible PET ribbons can be as well fibrillated tapes and multifilament threads are processed. It is also advantageous that the circular loom is heated less by less friction of the shuttle.

In the new design can be dispensed with the Kettbändchenschmierung, which costs, dirt, corrosion,

Odor nuisance and also the cost of cleaning the circular loom can be reduced. By eliminating the Avivagen the following processes such as coating or

Lamination and printing due to the improved

Surface adhesion facilitated. Of particular advantage is the avivagefreie production of the tissue for the

Food packaging.

For purposes of this disclosure, all location and directional indications, such as "top," "bottom," "front," "rear," "radial," "axial," "circumferential," "circumferential," etc., refer to the intended use condition of the reed at one

Circular loom, wherein the central axis of Riets, so the

Main axis of the circular loom, essentially vertical

is arranged.

The upper and lower warp passages are preferably aligned at the spaces between the reed bars so that the upper and lower warp passages are substantially at the same

Circumferential positions such as the spaces between the Rietstäben are. Preferably, the upper and lower warp passages have substantially the same width, i.

Extension in the circumferential direction of the upper or lower

Rietrings, as the spaces between the Rietstäben on.

According to a preferred embodiment, the first and second upper rollers for rolling on the upper running surface of the reed and the first and the second lower rollers for rolling on the lower running surface of the reed are each in one

Horizontal distance of preferably at least 5 mm to the

Arranged substantially vertical rolling surface of Riets, wherein the at least two wheels each at a vertical distance of preferably at least 5 mm, in particular at least 10 mm, to the upper tread and the lower running surface of the reed are arranged. Thus, free-running wheels and rollers are provided, which are characterized by low wear during operation. On the other hand, in EP 0 253 799 A2, the 45 ° rollers had to be brought into sliding contact with internal projections on the inner edges of the races, resulting in significant wear during operation.

According to a preferred embodiment, as wheels, first and second upper wheels and first and second lower wheels are provided, the first upper wheel at one end of the upper longitudinal side of the frame and the second upper wheel at the other end of the upper longitudinal side of the frame is arranged, wherein the first lower wheel at one end of the lower longitudinal side of the frame and the second lower wheel at the other end of the lower longitudinal side of the frame is arranged.

In order to obtain a particularly compact shuttle, it is favorable if the frame is inclined with respect to a direction substantially perpendicular to the direction of rotation (i.e.

Frame) extending median plane is formed substantially symmetrically. This design allows adaptation of the outer contour of the shuttle to the shed, whereby the friction between the warp and the shuttle is greatly reduced or even completely avoided.

In order to adapt the shape of the shuttle in a favorable manner to the course of the shed, the frame preferably has one

Middle section with a substantially horizontal course of the upper and lower longitudinal side, a from the

Central portion forwardly tapered front end portion and a rearwardly tapered from the central portion rear end portion, wherein the ratio between the length of the central portion and the length of the front

End portion of 0.6 to 2, in particular from 0.8 to 1.7 and / or the ratio between the length of the central portion and the length of the rear end portion of 0.6 to 3,

in particular from 0.8 to 1.5.

For this purpose, it is further favorable if the distance between the centers of the first and second upper roll of 7 to 25 cm, in particular from 10 to 15 cm, and / or the distance between the centers of the first and second lower rollers is from 7 to 25 cm, in particular from 10 to 15 cm. With regard to the desired compact dimensions of the shuttle, it is preferably provided that the distance between the centers of the first upper roller and the first lower roller of 4 to 7 cm, in particular from 5 to 6 cm, and / or that the distance between the centers the second upper roller and the second lower roller 4 to 7 cm, in particular from 5 to 6 cm. Preferably, the distance between the centers of the first upper wheel and the first lower wheel is from 3 to 7 cm, in particular from 3 to 5 cm, and / or the distance between the centers of the second upper wheel and the second lower wheel from 3 to 7 cm, in particular from 3 to 5 cm.

Preferably, the distance between the centers of the first upper wheel and the second upper wheel is from 16 cm to 34 cm, in particular from 20 cm to 25 cm, and / or the distance between the centers of the first lower wheel and the second lower wheel of 16 cm to 34 cm, in particular from 20 cm to 25 cm.

In a further preferred embodiment, in each case exactly one wheel is provided at each end of the frame, the two wheels preferably each substantially centered between the upper longitudinal side and the lower longitudinal side of the frame

are arranged. In this embodiment, therefore, only two (horizontal) wheels are provided, with the wheels on the

located opposite (longitudinal) ends of the shuttle.

The first and second upper rollers and the first and second lower rollers are preferably conical, i.

frusto-conical, formed.

According to a first particularly preferred embodiment, the upper Kettbändchen-passage openings between upper flanges of the Rietstäbe and / or the lower Kettbändchen- passage openings between lower flanges of the Rietstäbe are formed. In this embodiment, the upper and lower tread are provided on the Rietstäben, which

Upper side with the upper ring ring and the lower side with the lower ring ring are connected. The reed bars each have a larger one at the upper and lower flanges

Extension in the radial direction (depth) than at the middle portions of the reed rods between the upper and lower

Flanges on. Preferably, the upper and lower flanges radially inwardly from the central portions inwardly projecting projections of the Rietstäbe. The upper Kettbändchen- passage openings extend from the upper tread preferably in a substantially vertical upward direction, whereas the lower Kettbändchen- passage openings from the lower tread preferably extend substantially in the vertical direction downwards. In this embodiment, conventional upper and lower Rietringe be provided, which are preferably each formed in one piece. This version is therefore

structurally simple and therefore cost-effective. Furthermore, the orientation of the upper and lower Kettbändchen- passage openings at the interstices is not a problem, since the passages continuously pass into the upper and lower Kettbändchen-passages. (Preferably, the reed bars each have an extent in the radial direction (depth) of 30 mm to 40 mm, in particular of substantially 35 mm, on the upper and on the lower flanges The middle sections with the running surfaces for the wheels have the Rietstäbe, however, preferably an extension in the radial direction (depth) of 15 mm to 23 mm, preferably from 18 mm to 20 mm, in particular of substantially 20 mm, on

Execution is particularly stable. The upper or lower

Passage openings connect to the spaces between the middle portions of the reed rods. As upper and lower passages are in this embodiment, the free spaces between the upper and lower flanges of the Rietstäbe

intended. The upper and lower flanges preferably have a greater extent in the radial direction (with respect to the main axis of the reed) than the central portions of the reed rods, which extend in the vertical direction between the upper and lower flanges, and preferably the substantially vertical tread for have the upper and lower wheels. Preferably, the upper ring ring with the top of the upper flange and the lower ring ring with the bottom of the lower Flange connected. For example, the reed rods in retaining openings of the upper and lower ring ring (often referred to as Rietreifen) may be attached. The reed rods are preferably formed in one piece. In operation, the shuttle moves along the reed in the periodically opening and closing shed, which is made up of warps of warp ribbons. During the passage of the weft, the flocks of warp bands are arranged in the upper and lower passages of the Rietstäbe, so that the Kettbändchen

guided without contact to the upper and lower rollers of the shuttle. Advantageously, the Kettbändchen are not overrun during the circulation of Webschützens.

In a structurally simple, reliable embodiment, the upper tread on the (through the upper

Passages spaced from each other) lower edges of the upper flanges of the reed rods and / or the lower raceway formed on the (by the lower passage openings spaced apart) upper sides or upper edges of the lower flanges of the reed rods. In this embodiment, the upper rollers of the shuttle run along the bottoms of the upper flanges of the reed bars, which are arranged substantially in radial alignment between the upper and lower ring rings. The lower rollers of the shuttle shoot along the tops of the lower flanges of the reed bars.

To form the upper and lower flanges have the

Rietstäbe preferably in the radial direction inwardly open

Recesses on. As a result, the recesses of the reed bars form a rail extending in the circumferential direction of the upper or lower ring ring, on which the upper and lower running surfaces are provided for the circulation of the upper and lower rollers of the weaver.

With regard to a stable and cost-effective production, the reed rods are preferably formed from plate parts whose

Main planes are arranged substantially perpendicular to the direction of rotation of the weaver (i.e., to the circumferential direction of the upper and lower ring ring).

By the delay of the fabric hose in the direction of the Web shooters, due to the weft tension and the friction of the ribbon feeder on the selvedge, the reed rods are not exactly aligned radially in a preferred embodiment, but slightly set in the direction of rotation, ie are in

Top view slightly, for example, with an angle of 2 to 4 degrees, arranged rotated relative to an exact radial orientation.

According to an alternative preferred embodiment, the upper Kettbändchen passage openings are formed on the upper ring ring and / or the lower Kettbändchen passages on the lower ring ring. Preferably, the upper and the lower ring ring are each formed in one piece. At this

Embodiment, the upper and lower Kettbändchen- passage openings are provided on the upper and lower ring ring. Preferably, the width of the upper and lower corresponds

Warp passage openings (i.e., their extent in the circumferential direction of the upper and lower ring ring) each substantially to the circumferential distance between the Rietstäben. As a result, the upper and lower Kettbändchen- passage openings are precisely aligned with the spaces between the Rietstäbe. This embodiment variant has the particular advantage that the reed rods can be made particularly simple. It is further advantageous that the width of the upper and lower warp passage apertures (i.e.

whose extent in the direction of rotation of the shuttle can be greater than the width of the spaces between the Rietstäbe. As a result, a lower friction during entry and exit is achieved.

For this purpose, open upper slots may be provided on the upper ring ring towards its lower side and lower slots open on the lower ring ring towards the upper side thereof. Preferably, the upper slots and the lower slots are in

Arranged substantially vertically. In this embodiment, the upper tread is at an underside of the upper

Rietrings and the lower tread formed on an upper side of the lower ring ring.

In order to create enough space for the arrangement of the warp bands during the circulation of the weaver, it is advantageous if the upper warp tape passages over 1/4 to 3/4, in particular over 3/8 to 5/8, the maximum height of the upper ring ring and / or that the lower Kettbändchen- passage openings preferably about 1/4 to 3/4, in particular about 3/8 to 5/8, the maximum height of lower ring rings extend.

The invention is described below with reference to the drawing

illustrated embodiments further explained.

Fig. 1 shows a perspective view of a circular loom according to the invention with a Riet and a circulating along the Riets Webschützen, of which a Schussbändchen is dispensed between two sets of warp.

Fig. 2 shows a section of the circular loom of Fig. 1 in plan view.

Fig. 3 shows a longitudinal section of the circular loom according to Fig. 1, 2 in the area of a shuttle.

Fig. 4 shows a section of the circular loom of FIG. 1 to 3 from the inside.

Fig. 5 shows a section of the circular loom of FIG. 1 to 4 from the outside.

FIGS. 6 to 8 each show a section of a first embodiment of the reed for the circular loom of FIGS. 1 to 5.

FIGS. 9 to 12 each show a detail of a second embodiment of the reed for the circular loom of FIGS. 1 to 5.

FIGS. 13 to 17 show an embodiment of a shuttle for the circular loom of FIGS. 1 to 5.

In the drawing there is shown a circular loom 1, the basic structure of which has been known for a long time in the prior art (see for example EP 0 786 026 B1 or EP 2 829 645 A1). The

Circular loom 1 is for the use of tapes, threads, monofilaments and multifilaments as Kettbändchen and

Schussbändchen provided. The circular loom 1 has a round reed, hereafter abbreviated Riet 2, which is arranged around a main axis 2e extending substantially vertically in the operating position shown. Usually, the main axis 2e runs along one

Machine shaft (not shown).

The circular loom 1 comprises a warp-feeder 3a having a plurality of warp-tie guide elements 3b, which are designed as length compensation compensators, each having a spring bar and an eyelet at the upper end of the

Spring bar for passing and deflecting a Kettbändchens 4 include. The warp-tape guiding elements 3b are arranged distributed around the reed 2 of the circular loom 1. For better clarity, only one feeder 3a in

schematic representation shown. The reed 2 comprises an upper (as seen in the direction of the main axis 2e circular ring) Rietring 2a and a lower (seen in the direction of the main axis 2e also annularly encircling) Rietring 2b, between which evenly distributed a plurality of Rietstabsegmenten 2d with gaps 2g between

adjacent (in the drawing for reasons of clarity only partially shown) Rietstäben 2f (see Fig. 5) are arranged. The Kettbändchen 4 are not from

shown Kettbändchenspulen passed through the Kettbändchen- guide elements 3b and further passed through the gaps 2g between the Rietstäben 2f.

Between the warp guide elements 3b and the reed 2 shedding means 5 are arranged distributed around the reed 2. The shedding facilities 5 include a

Variety of first strands 6 and a plurality of second strands 7, which are interconnected at their ends and an upper

Wrap around guide roller 8a and a lower guide roller 8b. Each of the first strands 6 has an eyelet through which a

Kettbändchen 4 is passed. These warp strips 4, which are passed through the loops of the first strands 6, form a first warp band 10. Each of the second strands has an eyelet, through which a warp tape 4 is passed. These passed through the eyelets of the second strands 7

Kettbändchen form a second Kettbändchenschar 11. Alternatively eyelet straps can be used. In one embodiment, a lever controlled by an eccentric moves the loop of hoop around the stationary deflection rollers upwards or downwards (not shown). This will be the two

Kettbändchenscharen 10, 11 an opposite reciprocal movement imparted upwards or downwards, whereby a shed 9 (also called moving compartment) is opened and closed. The shed 9 forms in the open state one of the two Kettbändchenscharen 10, 11 defined space in which a (in Fig. 1 only indicated) weavers 12, the one

Schussbändchenspule (hereinafter short shute coil) 13 carries, moved on a circular path along the reed 2 while a not shown Schussbändchen of the worn by him

Pulls off the bobbin 13 and enters into the shed 9. The

Shed 9 is closed when the strands 6, 7 are in a central position in which the eyes of the first strands 6 and the second strands 7 are at the same height, whereby both

Kettbändchenscharen 10, 11 lie in the same area or

span this area together. In other words, the surface of the closed shed 9 is substantially the same

Angle bisector between the first Kettbändchenschar 10, which is the upper Kettbändchenschar in Fig. 1, and the second

Kettbändchenschar 11, which is the lower Kettbändchenschar in Fig. 1. It is thus true that the angle between the first

Kettbändchenschar 10 and the area is equal to the angle between the second Kettbändchenschar 11 and the surface. The surface is also defined as the surface containing the geometric connecting lines between the warp-knitting guide elements 3b and the weaving ring 14.

The size of the two Kettbändchenscharen 10, 11th

defined space of the shed 9 changes constantly with the opposite movement of the two Kettbändchenscharen 10, 11, starting at zero with a closed shed. The room of the

Shed 9 reaches a maximum when the two

Kettbändchenscharen 10, 11 to the opposite

Reversing points of their opposing alternating movement are, as shown in Fig. 1 partly. At these reversal points, the so-called change of subject begins by reversing the opposite

Kettbchenchenscharen 10, 11 lent movement. By the Changing the tray is the last registered in the shed 9

Firing ribbon is fixed in the tissue and it may be from the next

Protect 12 the next weft ribbon in the shed

be registered. Preferably, an even number of weavers 12, for example six or eight weavers 12, run at equal distances from one another in the reed 2 (in FIG. 1, only one shooter 12 is shown for the sake of clarity). The generated tubular fabric is guided inwardly to a centrally located Webring 14, to which (not

shown) take-off rollers is deflected out.

As can be seen schematically from FIG. 1, the shuttle 12 with the shuttle 13 passes on the return 2, i. essentially in the tangential direction 17, relative to the main axis 2e.

From FIGS. 6 to 8 a first embodiment of the reed 2 can be seen in detail. As mentioned, the reed 2 has the upper ring ring 2a, the lower ring ring 2b and the reed bars 2f, between which the interspaces 2g for the passage of the

Kettbändchen are formed. The reed 2 also has an upper running surface 18, on which two upper rollers 19 of the

Unroll wefts 12. In addition, the reed 2 has a lower running surface 20, on which two lower rollers 21 of

Unroll wefts 12. The upper rollers 19 and the lower rollers 21 are arranged upright, i. their axes of rotation

are essentially horizontal. The reed rods 2f further form on their insides a substantially vertical running surface 22, on each of which a pair of upper wheels 23 and lower wheels 24 of the shuttle 12 are guided. The upper wheels 23 and the lower wheels 24 are arranged horizontally, i. their axes of rotation are substantially vertical.

As can be further seen from FIGS. 6 to 8, the reed 2 has upper warp-passage openings 25, which continue the gaps 2g between the reed bars 2f starting from the upper running surface 18 upwards. In addition, lower warp-tape passage openings 26 are provided which continue the intermediate spaces 2g between the reed bars 2f, starting from the lower running surface 20 downwards.

In the embodiment of Figs. 6 to 8 are the upper Kettbändchen-passage openings 25 as clearances between upper flanges 27 of the reed rods 2f and the lower

Kettbändchen-passage openings 26 formed as a free space between the lower flanges 28 of the reed rods 2f. The upper tread 18 extends on the undersides of the upper

Flanges 27 of the reed rods 2f. The lower tread 20 extends at the tops of the lower flanges 28 of the reed bars 2f. To form the upper flanges 27 and the lower flanges 28, the reed rods 2f have inwardly in the radial direction inwardly open recesses 29 which form a continuous rail for the upper rollers 19, lower rollers 21, upper wheels 23 and lower wheels 24 of the shuttle 12 , The reed rods 2f are formed of plate parts having a substantially constant wall thickness. The main extension planes of the plate parts are in the embodiment shown substantially perpendicular to

Circumferential direction 17 of the shuttle 12 is arranged. However, the reed rods 2 can also be slightly twisted in the withdrawal direction (radially), in particular by two to four degrees. In plan view results in this embodiment, an arrangement in the manner of a

Turbine wheel. By the shot tension and the

Ribbon insert friction, the fabric tube is warped in weaving direction, whereby the warp is not exactly radial from the reed to the Webring.

As further apparent from FIGS. 6 to 8, the upper one is

Tread 18 according to a conical design of the upper rollers 19 inclined to the horizontal, wherein the upper tread 18 drops in the radial direction inwards. Accordingly, the lower tread 20 is inclined to the horizontal according to a conical design of the lower rollers 21, wherein the lower tread 20 increases in the radial direction inwardly. The angle of inclination of the upper tread 18 and the lower

Tread 20 to the horizontal, for example, in

Substantially 10 degrees.

In FIGS. 9 to 12, an alternative embodiment of the reed 2 is shown, in which the upper Kettbändchen- passage openings 25 on the upper ring ring 2a and the lower Kettbändchen-passage openings 26 are formed on the lower ring ring 2b. For this purpose, the upper ring ring 2a upper Slots, which are open to the bottom of the upper ring ring 2a out. The lower ring 2b has lower slots, which are open to the top of the lower ring ring 2b. In the embodiment shown, the upper ones extend

Warp passage apertures 25 substantially over 1/2 the height (i.e., the vertical extent) of the upper ring ring 2a. Accordingly, the lower Kettbändchen- passage openings 26 extend substantially over 1/2 of the height of the lower ring ring 2b.

Shown in FIGS. 13 to 17 is a preferred embodiment of the shuttle 12 used with the previously described Riet 2.

The shuttle 12 is shown in the drawing only schematically with the components essential to the invention.

For example, may be provided on the shuttle 12, a coil holder for rotatably supporting the shooting coil 13 about its longitudinal axis (not shown).

In any case, the shuttle 12 has an elongate frame 30 in the direction of rotation 17 with an upper longitudinal side 30a and a lower longitudinal side 30b. On the frame 30 are two upper rollers 19, namely a first (relative to the direction of rotation 17 front) upper roller 19 a and a second (based on the

Circumferential direction 17 rear) upper roller 19b for the upper

Tread 18 stored. Furthermore, on the frame 30, two lower rollers 21, namely a first (based on the

The direction of rotation 17 front) lower roller 21a and a second (with respect to the direction of rotation 17 back) lower roller 21b for the lower tread 20 stored. The rear lower roller 21b is formed in the embodiment shown as a drive roller for driving the shuttle 12 along the reed 2. The

Web contactors 12 also has two upper wheels 23, namely a first (with respect to the direction of rotation 17 front) upper wheel 23 a and a second (with respect to the direction of rotation 17 rear) upper wheel 23 b, which on the substantially

Roll off the vertical rolling surface 2h on the reed rods 2f.

Finally, on the frame 30, two lower wheels 24, namely a first (with respect to the direction of rotation 17 forward) lower wheel 24a and a second (relative to the direction of rotation 17 behind) Lower wheel 24b, provided for unrolling on the Rietstäben 2f.

As shown in FIGS. 13 to 17, the first upper gear 23 a is disposed at the front end of the upper longitudinal side 30 a of the frame 30 and the second upper gear 23 b is located at the rear end of the upper longitudinal side 30 a of the frame 30. The first lower wheel 24a is at the front end of the lower longitudinal side 30b of the frame 30 and the second lower wheel 24b is at the rear end of the lower

Longitudinal side 30b of the frame 30 is arranged. The first upper roller 19a and the second upper roller 19b are arranged in the longitudinal direction of the shuttle 12 (i.e., in the direction of revolution 17) between the first 23a and the second upper wheels 23b. The first 21a and the second lower roller 21b are correspondingly in FIG

Seen longitudinally of the shuttle 12 disposed between the first 24a and second lower wheel 24b. In the shown

Embodiment, therefore, the upper 19 and lower rollers 21 with respect to the circumferential direction 17 inside and the upper 23 and lower wheels 24 arranged outside of the shuttle 12.

The frame 30 is formed substantially symmetrically with respect to a substantially perpendicular to the direction of rotation 17 extending center plane 32, whereby a more precise adaptation of the geometry of the shuttle 12 to the course Webfaches. 9

is possible.

The frame 30 has in the embodiment shown with respect to the direction of rotation 17, a central portion 33 with a in

Substantially horizontal course of the upper 30a and lower longitudinal side 30b, one from the central portion 33 to the front

converging front end portion 34 and one of

Middle section 33 rear converging rear

End section 35 on. The ratio between the length of the central portion 33 (i.e., its extent in the direction of rotation 17) and the length of the front end portion 34 is less than 1 in the illustrated embodiment, in particular substantially

0.9. The ratio between the length of the central portion 33 and the length of the rear end portion 35 is greater than 1 in the embodiment shown, in particular substantially

1, 15.

The distance between the centers of the first 19a and second upper roller 19b is substantially 12.5 cm in the illustrated embodiment. The distance between the centers of the first 21a and second lower rollers 21b is in the

shown embodiment essentially 12.5 cm. The distance between the centers of the first upper roller 19a and the first lower roller 21a is substantially 5.5 cm in the illustrated embodiment. The distance between the centers of the second upper roller 19b and the second lower roller 21b is substantially 5.5 cm in the illustrated embodiment. The distance between the centers of the first upper wheel 23a and the first lower wheel 24a is shown in FIG

Execution essentially 3.5 cm. The distance between the centers of the second upper wheel 23b and the second lower wheel 24b is in the embodiment shown in FIG

Essentially 3.5 cm. The distance between the centers of the first upper wheel 23a and the second upper wheel 23b is substantially 21.5 cm. The distance between the centers of the first lower wheel 24a and the second lower wheel 24b is substantially 21.5 cm.

Furthermore, an upper and a lower bracket 36 can be seen schematically in FIG. 13, with which the warp strips 4 can be lifted above the shooting coil 13. In the embodiment shown, the upper bracket 36 extends exclusively to the upper longitudinal side 30a, the lower bracket 36 exclusively on the lower longitudinal side 30b of the frame 30. Accordingly, the bracket 36 can be designed much simpler than in the prior art.

3, the first upper roller 19a and the second upper roller 19b for rolling on the upper tread 18 of the reed 2, and the first lower roller 21a and the second lower roller 21b for rolling on the lower tread 20 of FIG Riets 2 each at a horizontal distance to the substantially vertical rolling surface 2h of the reed. 2

arranged. The at least two wheels 23, 24; 23a, 23b; 24a, 24b are correspondingly in each case at a vertical distance to the upper running surface 18 or to the lower running surface 20 of the reed 2

arranged. Thus, freewheeling wheels and rollers

used.

Claims

Claims:

A circular loom (1) comprising a main axis (2e), a reed (2), a warp-tape feeder (3a) for feeding warp ribbons (4), a shuttle (12) circulating along the reed (2), said Riet (2) for guiding the weaver (12) comprises:

an upper ring ring (2a),

a lower ring ring (2b),

- a plurality of the upper ring ring (2a) with the lower ring ring (2b) connecting Rietstäben (2f), between which intermediate spaces (2g) for the passage of Kettbändchen (4) are formed,

an upper running surface (18) for two upper rollers (19; 19a, 19b) of the shuttle (12),

a lower running surface (20) for two lower rollers (21, 21a, 21b) of the shuttle (12),

- Upper Kettbändchen-passage openings (25), which the

Continue between the spaces (2g) between the reed bars (2f) starting from the upper tread (18) and

lower warp passage apertures (26) continuing downwards the interstices (2g) between the reed bars (2f) from the lower run surface (20) so that the two upper rolls (19; 19a, 19b) and the two lower ones Rollers (21, 21a, 21b) of the shuttle (12) do not come into contact with the warp bands when the shuttle (12) circulates along the reed (2),

characterized in that the shuttle (12) comprises:

- A frame (30) having an upper longitudinal side (30 a) and

a lower longitudinal side (30b),

- A first (19 a) and a second upper roller (19 b) for

Rolling on the upper running surface (18) of the reed (2),

- A first (21 a) and a second lower roller (21 b) for

Rolling on the lower running surface (20) of the reed (2),

- At least two wheels (23, 24) for unrolling on an im

Essentially vertical rolling surface (2h) of the reed (2), wherein

- The at least two wheels (23, 24, 23a, 23b, 24a, 24b) in

Longitudinal direction of the shuttle (12) seen at opposite ends of the frame (30) are arranged, wherein

- the first (19a) and the second upper roller (19b) and the first (21a) and the second lower roller (21b) each seen in the longitudinal direction of the shuttle (12) between the at least two wheels (23, 24, 23a, 23b 24a, 24b)

are arranged.

2. loom (1) according to claim 1, characterized in that the first (19 a) and second upper roller (19 b) for unrolling on the upper tread (18) of the reed (2) and the first

(21a) and the second lower roller (21b) for unrolling on the lower running surface (20) of the reed (2) each in one

Horizontal distance to the substantially vertical rolling surface

(2h) of the reed (2) are arranged and that the at least two wheels (23, 24; 23a, 23b; 24a, 24b) each in one

Vertical distance to the upper tread (18) and the lower running surface (20) of the Riets (2) are arranged.

3. loom (1) according to claim 1 or 2, characterized

characterized in that a first (23a) and a second upper wheel

(23b) and a first (24a) and a second lower wheel (24b) of the shuttle (12) are provided, wherein the first upper wheel

(23a) at one end of the upper longitudinal side (30a) of the frame (30) and the second upper wheel (23b) at the other end of the upper one

Longitudinal side (30 a) of the frame (30) is arranged, wherein the first lower wheel (24 a) at one end of the lower longitudinal side

(30b) of the frame (30) and the second lower wheel (24b) at the other end of the lower longitudinal side (30b) of the frame (30) is arranged.

4. circular loom (1) according to one of claims 1 to 3, characterized in that the frame (30) of the shuttle (12) is formed with respect to a substantially perpendicular to the direction of rotation center plane substantially symmetrical.

5. circular loom (1) according to one of claims 1 to 4, characterized in that the frame (30) of the shuttle (12) has a central portion (33) having a substantially horizontal The upper (30a) and lower longitudinal side (30b) have a front end section (34) that tapers forwards from the central section (33) and a rear end section (35) which tapers rearwardly from the central section (33), the ratio between the length of the central portion (33) and the length of the front end portion (34) of 0.6 to 2,

in particular from 0.8 to 1.7 and / or the ratio between the length of the middle section (33) and the length of the rear end section (35) is from 0.6 to 3, in particular from 0.8 to 1.5.

6. circular loom (1) according to one of claims 1 to 5, characterized in that the distance between the centers of the first (19a) and second upper roller (19b) of the weaver (12) of 7 to 25 cm, in particular from 10 to 15 cm, and / or that the distance between the centers of the first (21a) and second lower roller (21b) of 7 to 25 cm, in particular from 10 to 15 cm.

7. circular loom (1) according to one of claims 1 to 6, characterized in that the distance between the centers of the first upper roller (19a) and the first lower roller (21a) of the weaver (12) of 4 to 7 cm, in particular from 5 to 6 cm, and / or that the distance between the centers of the second upper roller (19b) and the second lower roller (21b) is from 4 to 7 cm, in particular from 5 to 6 cm.

8. circular loom (1) according to one of claims 1 to 7, characterized in that the distance between the centers of the first upper wheel (23a) and the first lower wheel (24a) of the weaver (12) of 3 to 7 cm, in particular from 3 to 5 cm, and / or that the distance between the centers of the second upper wheel (23b) and the second lower wheel (24b) is from 3 to 7 cm, in particular from 3 to 5 cm.

9. loom (1) according to one of claims 1 to 8, characterized in that the distance between the centers of the first upper wheel (23a) and the second upper wheel (23b) of the weaver (12) from 16 cm to 34 cm, in particular from 20 cm to 25 cm, and / or that the distance between the centers of the first lower wheel (24a) and the second lower wheel (24b) of 16 cm to 34 cm, in particular from 20 cm to 25 cm.

10. circular loom (1) according to claim 1 or 2, characterized

exactly one wheel (23, 24, 23a, 23b, 24a, 24b) is provided at each end of the frame (30) of the shuttle (12), the two wheels (23, 24; 23a, 23b; 24a , 24b) are preferably each arranged substantially centrally between the upper longitudinal side (30a) and the lower longitudinal side (30b) of the frame (30).

11. loom (1) according to one of claims 1 to 10, characterized in that the upper Kettbändchen- passage openings (25) between upper flanges (27) of the Rietstäbe (2f) and / or the lower Kettbändchen- passage openings (26) between the lower Flanges (28) of the Rietstäbe (2f) are formed.

12. circular loom (1) according to claim 11, characterized

characterized in that the upper running surface (18) on the

Bottoms of the upper flanges (27) of the reed bars (2f) and / or the lower tread (20) on the tops of the lower ones

Flanges (28) of the Rietstäbe (2f) are formed.

13. circular loom (1) according to claim 11 or 12, characterized in that the Rietstäbe (2f) in the radial direction inwardly open recesses (29) for forming the upper (27) and lower flanges (28).

14. circular loom (1) according to one of claims 1 to 13, characterized in that the reed rods (2f) from

Plate members are formed whose main planes substantially perpendicular to the direction of rotation (17) of the weaver (12)

are arranged.

15. loom (1) according to one of claims 1 to 10, characterized in that the upper Kettbändchen- passage openings (25) on the upper ring ring (2a) and / or the lower Kettbändchen-passage openings (26) at the bottom

Ring ring (2b) are formed.