EP0013321A1 - Linear shed multiphase wearing machine with a wearing rotor - Google Patents

Abstract

Amultiple longitudinal traversing shed weaving apparatus comprises a weaving rotor having beating elements for the laid or inserted weft threads and shed-retaining elements which retain the warp threads, throughout a predetermined path, in their upper shed position and lower shed position. Each intermediate space between neighboring beating or beat-up elements has operatively associated therewith a respective shed-retaining element which determines the upper shed position or lower shed position and, viewed in the direction of travel of the warp threads, there is arranged forwardly of the weaving rotor a control means for the lateral deflection and selective allocation of the warp threads to a shed-retaining element which determines the upper shed position or lower shed position. Between each two respective beat-up elements, following one another in the direction of rotation of the weaving rotor, there is arranged at the weaving rotor a respective guide element for the warp threads, whose line of alignment is located within the intermediate space between beat-up elements neighboring one another in the weft direction.

Description

The invention relates to a row shed weaving machine with a weaving rotor, which has the warp threads holding the warp threads in their up or down position in a predetermined way, and the stop elements which strike the inserted weft threads.

As is known, the row shed weaving machines together with the wave shed weaving machines form the genus of multi-phase weaving machines, in which a plurality of weft threads which are shifted step by step against each other are always entered into shifts which are also shifted and migrating step wise. While in the shed weaving looms the sheds are formed several times over the weaving width and move in the weft direction, in the shed weaving machines one each is formed over the entire weaving width and the successively formed shed weaves simultaneously move several times in the warp direction.

During this weaving of the shed in the warp direction, the shed formed must be preserved so that the weft entries can be shifted in stages. The so-called technical governing bodies serve this purpose. In a first row shed loom known from US Pat. No. 2,742,058 of the type mentioned in the introduction, the weaving rotor is formed by alternately arranged polygonal warp thread support disks and cutting disks. The warp thread support disks are used both for shed formation and as shed retaining elements and are shifted by an angle in relation to the desired binding. The warp threads run from the warp beam through a fixed comb onto the individual warp thread support disks.

This well-known first row shed weaving machine could not prevail in practice, mainly because each weave change required a modification of the weaving rotor.

To avoid these disadvantages, a row shed weaving machine was proposed in US Pat. No. 3,848,642, in which a control means is arranged upstream of the area of the shed in order to be able to laterally deflect each warp thread according to a program and thus to assign a shed organ determining the high or low shed , each compartment holding member has a thread support located at the height of the Iloch or deep compartment. Each compartment retaining element is provided for a plurality of warp threads, so that four warp threads come to lie on each support, for example in the case of plain weave.

In this known second row shed weaving machine, the weaving rotor does not need to be converted for a weave change, but for this the stop elements, about which nothing is said in the cited US Pat. No. 3,848,642, have to be immersed in the warp threads in the Iloch or deep shed position, whereby the reading errors that are also known from the shaft weaving looms with rotation ratios can occur. In addition, the assignment of each a plurality of warp threads to form a thread support so that the warp threads have to be adjusted over a relatively large distance. In cases where this adjustment path reaches the range of the stroke of conventional shedding means, this can severely limit the performance of this row shed weaving machine.

The invention is intended to provide a row shed weaving machine, the weaving rotor of which does not need to be rebuilt when changing the weave, and in which no reading errors can occur due to immersion of the stop elements in the warp threads already occupying the high or low position.

This object is achieved according to the invention in that each intermediate space between two adjacent stop elements is assigned a specialist holding element which defines the high or low shed and that in the running direction of the warp threads in front of the weaving rotor there is a control means for lateral deflection and optional assignment of each warp thread to the up or down Lower specialist position organ is arranged.

Since, in the solution according to the invention, instead of a single shed retaining element for several tubes, as is known as the space between adjacent stop elements, there are now two shed retaining elements per tube, the warp threads run in an orderly manner, or in other words evenly distributed over the length of the weaving rotor, so that this Immersing the stop elements should not pose any problems. In addition, any desired binding can be produced by appropriate control of the control means without the need to convert the weaving rotor.

A first preferred embodiment is characterized in that a guide element for the warp threads is arranged on the weaving rotor between two stop elements that follow each other in the direction of rotation, the alignment line of which lies within the space between stop elements adjacent in the weft direction.

This embodiment offers a significant advantage over all known weaving rotors of row shed and rotary rivets of shed weaving machines. All of these machines have the problem of reading the warp threads into the correct tube. So far, this problem has always been solved by arranging a guide comb at the smallest possible distance from the elements immersed in the warp threads, the individual slats of which are aligned with these elements as precisely as possible. It was hoped that a warp thread lying between two lamellae of the guide comb would also lie in the correct tube if these lamellae were exactly aligned with the immersing elements. However, practical experience with shaft weaving machines with rotary reeds has shown that this hope is not fulfilled.

In the preferred embodiment of the row shed weaving machine according to the invention, the guide teeth are not currently aligned with the stop elements, but their alignment line lies in the space between them, that is to say within the respective tube. In connection with the control means for the lateral deflection of the warp threads in the weft insertion direction, each warp thread is placed on its guide tooth from the left or from the right and is therefore reliably read into the correct tube of the stop elements.

• Fig. 1 einen schematischen Querschnitt durch eine Reihenfachwebmaschine,
• Fig. 2 eine schematische Ansicht in Richtung des Pfeiles 11 von Fig. 1,
• Fig. 3 einen Ausschnitt aus Fig. 2 in vergrösserter Darstellung,
• Fig. 4 einen Schnitt nach der Linie IV - IV von Fig. 2,
• Fig. 5 eine schematische Ansicht des Webrotors der in Fig. 1 dargestellten Reihenfachwebmaschine in perspektivischer Darstellung, und
• Fig. 6 einen Querschnitt durch den in Fig. 5 dargestellten Webrotor.

The invention is explained in more detail below with the aid of an exemplary embodiment and the figures of the drawing; in the latter show:

• 1 shows a schematic cross section through a row shed weaving machine,
• 2 is a schematic view in the direction of arrow 11 of FIG. 1,
• 3 shows a detail of FIG. 2 in an enlarged view,
• 4 shows a section along the line IV-IV of FIG. 2,
• Fig. 5 is a schematic view of the weaving rotor of the row shed weaving machine shown in Fig. 1 in perspective, and
• Fig. 6 shows a cross section through the weaving rotor shown in Fig. 5.

1 and 2, a row shed weaving machine according to the invention essentially consists of a warp beam 1, a coating roller 2, a control device 3 for the lateral deflection of the warp threads 4 in order to assign them to a high or low position according to a predetermined fabric pattern, a weaving rotor 5, one Breast boom 6, a take-off device 7 for the tissue 8 produced and from a goods tree 9.

The weaving rotor 5, which rotates in operation in the direction indicated by an arrow P, has a cylindrical shape and is circumferential in the direction of rotation alternately provided with lamella combs 10 and 11 extending in the longitudinal direction of the weaving rotor and thus in the weft direction. The lamellar combs 10 consist of stop lamellas 12 for striking the weft threads inserted, the lamellar combs 11 consist of guide lamellae 13 between which the holding elements 4 and 15, which define the up or down position of the warp threads 4, are arranged alternately. The warp threads 4 are held in their up or down position by the shed holding members 14 and 15 over the entire wrap angle α of approximately 120 °. The weaving compartments thus formed move one behind the other to the fabric stop edge, with a weft thread being inserted in each compartment in a staggered manner in the period in which the compartments are open.

A unit 16 for preparing and inserting weft threads is arranged next to one of the end faces of the weaving rotor 5. This unit 16 does not form part of the invention and is therefore not described in more detail. Any suitable weft insertion system can be used in connection with the weaving rotor 5, be it one with shooters, with boats, with projectiles, with reciprocating rods or bands or with a fluid. Regarding such entry systems known in connection with row shed looms, reference is made to DE-AS 1 089 695 and to US Pat. Nos. 2,742,058, 4,122,871, 4,122,872 and 4,129,153.

From Fig. 2 it can be seen that along the jacket of the weaving rotor 5 on the one hand the stop lamellae 12 of the lamella combs 10 and on the other hand the guide lamellae 13 of the lamellar combs 11 each align and that the line of alignment of the individual guide lamellae 13 in the middle of the space, the so-called tube, the assigned Stop plates 12 and the lines of alignment of the stop plates 12 run in the middle of the tube of the associated guide plates 13. In addition, the specialist holding members 14 on the one hand and the specialist holding members 15 on the other hand are aligned.

The control device 3 consists of several, according to the illustration, four rods 17 arranged parallel to the firing direction, which are connected to an actuating device 18 and can be moved back and forth by the latter in the direction of the double arrow A. The rods 17 are provided with guide eyes for the warp threads 4, so that the latter are laterally deflected when the rods 17 move in the longitudinal direction thereof. The number of rods 17 depends on the type of binding to be produced, two such rods 17 are sufficient for plain weave, and more rods 17 must be used for more complicated bindings. The actuating device 18 is of the type of a conventional control mechanism for dobby machines, which uses a program to move each of the rods 17 corresponding to a conventional shaft before each immersion of one of the two lamella combs 10 or 11 in the warp threads 4 into one of its two end positions. In this end position, the relevant warp thread 4 rests within its tube on the left or right of the lamellae 12 or 13 delimiting this tube and, due to the shifting of half a tube pitch between the successive lamella combs 10 and 11, will certainly be in the correct tube of the next one Lamellar comb read.

• - Die Masse einer Stange 17 ist wesentlich geringer als diejenige jedes bekannten Schaftes, sodass zu ihrer Verstellung im Vergleich zu einem Schaft weitaus weniger Energie erforderlich ist.
• - Die Abmessungen einer Stange 17 sind wesentlich kleiner als diejenigen jedes bekannten Schaftes, sodass sich auf gleichem Raum eine um ein Vielfaches grössere Anzahl von Stangen 17 unterbringen lässt.
• - Der Verstellweg, also der Hub der Stangen 17 beträgt nur einen Bruchteil eines normalen Schafthubs, da sich dieser Verstellweg nicht nach der Fachöffnung richtet sondern nur eine Verschwenkung eines Kettfadens von der einen an die andere Begrenzungslamelle seines Rohres bewirken muss. Somit ist die Verstellung der Stangen 17 in einer weitaus kürzeren Zeitspanne zu bewältigen als die Verstellung eines konventionellen Schaftes und die Frequenz der Verstellungen der Stangen 17 kann im Vergleich zu der die Leistung von Einphasen-Hochleistungswebmaschinen schon heute begrenzenden Frequenz der Hubbewegungen konventioneller Schäfte um ein Mehrfaches gesteigert werden.

The difference between the control device 3 and a conventional shedding mechanism by means of a dobby and shafts lies essentially in three points:

• - The mass of a rod 17 is significantly less than that of any known shaft, so that it requires far less energy to adjust compared to a shaft.
• - The dimensions of a rod 17 are significantly smaller than those of any known shaft, so that a much larger number of rods 17 can be accommodated in the same space.
• - The adjustment path, i.e. the stroke of the rods 17 is only a fraction of a normal shaft stroke, since this adjustment path does not depend on the compartment opening but only has to cause a warp thread to pivot from one to the other of the limiting lamella of its tube. Thus, the adjustment of the rods 17 can be accomplished in a much shorter period of time than the adjustment of a conventional shaft and the frequency of the adjustments of the rods 17 can be several times higher than the frequency of the lifting movements of conventional shafts, which already limits the performance of single-phase high-performance weaving machines be increased.

The reading of the warp threads 4 into the weaving rotor 5 will now be explained with reference to FIG. 3: The figure schematically shows two lamella combs 11 ₁ and 11 ₂ with guide lamellae 13 and the lamella comb 10 running between them with stop lamellae 12. The warp threads 4 drawn in with double lines, which are each in the vertical position in the slat comb 11 _{1 that} has been immersed in the warp threads for some time, are guided through the rod 17 ₁ , the warp threads 4 shown with a single line are located in the slat comb 11 ₁ each in the low position and are guided by the rod 17 ₂ . As has already been said. Because of For clarity, the other two rods 17 shown in FIG. 1 are omitted, so that every second tube has no warp in the fin comb 10 and only one warp thread 4 in the fin comb 11.

It is assumed that the lamellar comb 10, like the lamellar comb 11 _{1, is} fully immersed in the warp threads 4 and that the lamellar comb 11 ₂ will soon be immersed in the warp threads 4, the warp threads 4 guided by the rod 17 ₁ in the deep and the warp threads 4 guided by the rod 17 ₂ should reach the high shed position.

In order to achieve this, the rods 17 ₁ and 17 _{2 must be moved} by the actuating device 18 (FIG. 2) in such a way that the warp threads 4 guided by them assume the positions shown in full lines. The warp threads 4 guided by the rod 17 ₁ are moved to the left and the warp threads 4 guided by the rod 17 ₂ are moved to the right until they rest against the stop lamella 12 delimiting their tube on the left or right. In this way, the guide slats 13 can each enter between two spread-out warp threads 4 into the warp thread array, one of two of these spread-apart warp threads 4 always in a tube of the slat comb 11 ₂ with a compartment holding element 14 for the high shed position and the other with one a compartment holding member 15 for the low position.

If the warp threads 4 guided by the rod 17 ₁ in the lamellar comb 11 _{2 are to} enter the perforated hole and the warp threads 4 guided by the rod 17 _{2 are to} enter the deep position, then the rod 17 ₁ in the direction of arrow B and the rod 17 ₂ are moved in the direction of arrow C so that the warp threads 4 assume the position shown in dashed or dash-dotted lines.

The adjustment path of the rods 17 ₁ and 17 ₂ between the two warp thread positions appears in Fig. 3 because of the scale and the exaggerated thickness of the fins 12 and 13 and the tube widths also drawn in the fin combs 10 and 11 much larger than in reality , where this adjustment range is a few millimeters and is usually well under ten millimeters.

4 to 6, the weaving rotor 5 is shown in detail. As shown, this consists of a tubular roller 20, which is connected to a drive shaft 21 and is provided on its jacket with a plurality of grooves 22 and 23 for receiving the lamellar combs 10 and 11, which run parallel to the longitudinal axis of the rotor and thus to the weft insertion direction. The grooves 22 and 23 have an L-shaped cross section, two grooves 22 and 23 each form an associated pair, in which the transverse legs of the L-shaped profile point away from one another. The jacket of the roller 20 has a total of 14 such pairs of grooves.

This construction of the weaving rotor 5 from the roller 20 with the circumferential grooves 22 and 23 means that the shed holding members 15 (FIG. 3) for the downstairs position can be dispensed with, since the warp threads 4 are supported in the downstairs position as shown in FIG. 4, through the jacket of the roller 20 can be done. The individual lamella combs 10 and 11 have, instead of the compartment holding members 15 (FIG. 3) for the deep compartment position, spacer elements 24 (FIGS. 5, 6) which at most slightly protrude beyond the jacket of the roller 20.

It can be seen from FIGS. 4 and 6 that both the guide slats 13 and the shed holding members 14 for the high shed position of the warp threads 4 with a recess 19 are provided. These recesses 19 form a channel for the weft insertion for each lamella comb 11. It can also be seen that two guide lamellae 13 alternately one compartment holding element 14 for the high position of the warp threads 4 or one spacer element 24, and that two stop lamellae 12 also each limit a spacer element 24.

4, the stop lamellae 12 of the adjacent lamella comb are each aligned with the center of the tube of the lamella comb formed by the guide lamellae 13. As shown, there are two warp threads 4 in each tube of each of the two fin combs, in the tube between two guide fins 13 there are both warp threads 4 together either in the up or down position, in the tube between two stop blades 12 there is one warp thread 4 in high - and the other in the low position. This representation corresponds to the use of four rods 17 indicated in FIG. 1. In contrast, only two rods 17 are shown in FIGS. 2 and 3 for the sake of clarity. Accordingly, every second tube between the stop plates 12 is empty. It should also be pointed out that the arrangement of the warp threads 4 shown in FIG. 4, which corresponds to a double-stitch plain weave, is arbitrary and that with the weaving rotor 5 shown, together with the control device 3, all conceivable weave variants between the two extreme values - all warp threads in High or all warp threads in the low position - can be realized.

Each lamella comb 11 is constructed from Fachhalteor ^g anen 14 for the high position, from guide lamella 13 and spacers 24. The lamellar combs 10 are constructed from spacer elements 24 and from stop lamellae 12.

5, the compartment holding members 14 and the spacer elements 24 are substantially thicker than the stop and guide plates 10 and 13. Preferably, the thickness of the compartment holding members 14 and / or spacer elements 24 arranged between the plates of the one plate comb 11 or 10 is Three times the thickness of the fins of the other fin comb 11 or 10.

The individual elements of each lamellar comb 10, 11 are connected, for example by gluing, to comb portions of, for example, 100 mm in length, and these portions are inserted into the corresponding grooves 22 or 23 and fixed therein. In the event of changes in the lamella density, the individual lamella combs 10 or 11 can simply be exchanged without the entire weaving rotor 5 having to be dismantled.

The individual elements forming the lamellar combs 10, 11 each have a foot part, the cross section of which is adapted to that of the grooves 22 and 23. The spacer elements 24 are dimensioned such that their upper end does not protrude from the casing of the roller 20 or only slightly. The compartment holding members 14 for the high compartment position, the stop lamellae 12 and the guide lamellae 13 each have an upper part 25, 26 or 27 projecting beyond the lateral surface of the roller 20 after their foot part.

The upper part 25 of the shed retaining members 14 for the high shed position has the shape of a finger curved counter to the direction of rotation P of the weaving rotor 5, the outer curved surface of which forms the support for the warp threads 4 in its shed position and the inner curved surface of which forms the guide channel 19 for the weft insertion from above and in Direction of rotation P seen from the front limited. The guide channel 19 is delimited from below by the jacket of the roller 20, towards the rear from the stop elements 12 of the adjacent lamella comb 10.

The upper part 27 of the guide slats 13 has the shape of a parallelogram-shaped wing, which is provided on its edge facing the roller 20 with a contour corresponding to the inner curvature surface of the finger-shaped upper part 25 of the compartment holding members 14 for the high compartment position, which also the channel 19 from above and from limited at the front.

The upper part 26 of the stop slats 12 has a sickle-like shape. The tip of this sickle faces the direction of rotation P to the rear. The outer edge of this upper part 26 serves to strike the inserted weft threads and therefore protrudes the furthest from all the mentioned upper parts in the radial direction from the jacket of the roller 20. The outer edge of the upper part 27 of the guide slats 13 is somewhat closer to the roller 20 and the outer surface of curvature of the finger-shaped upper part 25 is somewhat less than half the distance between the jacket of the roller 20 and the outer edge of the upper part 26 of the stop slats 12 which strikes the weft threads.

As can be seen in FIG. 6, the shape and dimensions of the lamellae 12 and 13 and the mutual distance of the grooves 22 and 23 and thus the lamella combs 10 and 11 are selected such that there is only a small distance of about 1 between the individual lamella combs mm or less.

Of course, instead of the type described, the weaving rotor 5 could also be constructed in the manner of the rotary reed known from the shaft weaving looms from individual lamellae in the form of circular plates provided with projections. A web rotor of this kind would have to however, practically completely removed, dismantled, reassembled and reinstalled for every item change.

Claims (17)

1. Row shed weaving machine with a weaving rotor, which has the warp threads over a predetermined path in their high or low position holding fixture elements and the inserted weft threads striking stop elements, characterized in that each space between adjacent stop elements (12) has a fixation element defining the high or low position ( 14, 15) and that in the running direction of the warp threads (4) in front of the weaving rotor (5) there is a control means (3) for lateral deflection and optional assignment of each warp thread to a specialist holding element that defines the high or low position. 2. Row shed weaving machine according to claim 1, characterized in that a guide element (13) for the warp threads (4) is arranged on the weaving rotor (5) between each two stop elements (12) successive in its direction of rotation (P), the alignment of which within the space lies between stop elements adjacent in the weft direction. 3. Row shed weaving machine according to claim 2, characterized in that the alignment line of each guide element (13) extends in the central plane of the space between adjacent stop elements (12). 4. Row shed loom according to claim 3, characterized in that the stop elements (12) are arranged uniformly on the circumference of the weaving rotor (5) in the form of first lamella combs (10) running parallel to the longitudinal axis thereof, and that between each two successive first lamella combs out Guide elements (13) formed second lamella comb (11) is arranged, which also runs parallel to the longitudinal axis of the weaving rotor. 5. Row shed weaving machine according to claim 4, characterized in that the shed retaining members (14, 15) are arranged within each second lamella comb (II), with a shed retaining member (14) for the hole or such alternating between two adjacent guide elements (13) (15) is arranged for the low position. 6. Row shed weaving machine according to claim 5, characterized in that on the one hand the stop elements (12) of the first lamella combs (10) and on the other hand the guide elements (13) of the second lamella combs (11) are arranged along circumferential circles on the jacket of the weaving rotor (5) and that the circumferential circles assigned to the two lamella combs are shifted from one another by half a division of the lamella combs. 7. Row shed weaving machine according to claim 6, characterized in that the shed retaining members (14) for the vertical and the shed retaining members (15) for the down shed are each arranged along circumferential circles on the jacket of the weaving rotor (5). 8. Row shed weaving machine according to one of claims 1 to 7, characterized in that the weaving rotor (5) has a tubular roller (20) which on its jacket with grooves parallel to the longitudinal axis of the weaving rotor (22, 23) for receiving the stop elements (12 ) or the specialist holding bodies (14) is provided. ₉ . Row shed weaving machine according to claim 8, characterized in that the shed retaining members (15) for the low shed position are replaced by spacer elements (24) which are at most slightly superior to the jacket of the roller (20) and that the supports for the warp threads (4) in the shed position are replaced by these shim elements or are formed by the jacket of the roller. 10. Row shed weaving machine according to claims 4 and 8, characterized in that the one grooves (22) for receiving the first lamella combs (10) and the other grooves (23) are provided for receiving the second lamella combs (11). 11. Row shed weaving machine according to claim 10, characterized in that between 10 and 20, preferably 14 pairs of grooves (22, 23) are arranged on the jacket of the roller (20). 12. Row shed loom according to one of claims 8 to 11, characterized in that the shed holding members (14) for the hole position on their part of the roller (20) projecting part (25) have the shape of a counter to the direction of rotation (P) of the weaving rotor (5 ) have curved fingers, the outer curvature surface of which serves as a support for the warp threads (4) in their vertical position and the inner curvature surface delimits a guide channel (19) for weft insertion from above and in the direction of rotation from the front. 13. Row shed loom according to claim 12, characterized in that the guide channel (19) for weft insertion from below through the jacket of the roller (20) and in the direction of rotation (P) of the weaving rotor (5) towards the rear is limited by the stop elements (12) of the adjacent first lamella comb (10). 14. Row shed weaving machine according to claims 2 and 13, characterized in that the guide elements (13) on their part (27) projecting from the jacket of the roller (20) have the shape of a parallelogram-shaped wing, which on its edge facing the roller with a inner curvature surface of the finger-shaped part (25) of the compartment holding members (14) is provided for the contour corresponding to the vertical position, which delimits the guide channel (19) from above and from the front. 15. Row shed weaving machine according to claims 10 and 14, characterized in that a spacer element (24) is provided between each two stop elements (12) within the first fin combs (10). 16. Row shed weaving machine according to claim 15, characterized in that the stop and the guide elements (12, 13) have the same thickness and that the thickness of the shed holding members for the high shed position (14) and the spacer elements (24) each is three times the thickness of the stop elements is. 17. Row shed weaving machine according to claim 16, characterized in that the mutual distance between the lamella combs (10, 11) is at most 2, preferably about 1 millimeter.

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