EP0012253B1 - Linear shed multiphase weaving machine with a weaving rotor - Google Patents

Abstract

A multiple longitudinal traversing shed weaving apparatus comprises a weaving rotor having beat-up or beating elements for the inserted weft threads and shed-retaining elements which retain the warp threads, throughout a predetermined path, in their upper shed position or lower shed position. Each intermediate space between neighboring beat-up elements has operatively associated therewith a respective shed-retaining element which determines the upper shed position or lower shed position. Control means are arranged forwardly of the weaving rotor, viewed in the direction of travel of the warp threads, and serve for the lateral deflection and selective allocation of the warp threads at a shed-retaining element which determines the upper shed position or lower shed position. The control means possesses stroke adjusting elements in the weft direction which are constituted by rods or bars extending in the weft direction. These rods are connected with an actuation device of the type used in a conventional dobby loom.

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 and arranged alternately within lamella combs, and with a control means arranged in the running direction of the warp threads in front of the weaving rotor for lateral deflection and assignment of each Warp thread to a specialist holding element that defines the high or low compartment.

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 wave shed looms the sheds are formed several times over the weaving width and move in the weft direction, in the shed weaving machines one shed is formed over the entire weaving width and the successively formed shed weaves simultaneously move several times in the warp direction.

In a known from CH patent 543 621 rattle shed weaving machine of the type mentioned, the control means for lateral deflection of the warp threads are formed by rotatable control rollers, which run on their jacket with self-contained oblique guide grooves back and forth for each warp thread are provided. When the control rollers rotate, the warp threads are laterally deflected in accordance with the course of the guide grooves and are thus assigned to the desired compartment-holding element, this assignment being supported by separating elements which are arranged in the warp threads immediately after the control rollers and are immersed in the warp threads.

In this row shed weaving machine, several warp threads are assigned to a single shed holding element, which means that the warp threads have to be deflected relatively strongly by the control rollers. The guiding of the warp threads in the guide grooves causes a high stress on the warp threads, in particular a strong friction between them and the guide grooves. In addition, the control rollers are not variable and must be replaced or at least converted if the binding changes.

The invention is intended to provide a row shed weaving machine, the control means of which only little use the warp threads and which can also be adapted to changes in weave without modification.

This object according to the invention since _- achieved by that the control means extending in the weft direction and hubverstellbare in this direction and connected to a controlled actuation device identifies rods with guide eyelets for the warp threads.

In the solution according to the invention, on the one hand, only very low frictional forces occur between the guide eyes and the warp threads, and on the other hand, if a suitable control of the actuating device for the rods is chosen, any desired binding can be produced without structural intervention in the control means having to be carried out.

• 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 loom 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, is of a cylindrical shape and is provided on its circumference in the direction of rotation alternately 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 the time in the the compartments are open, a weft thread is inserted into each compartment in a staggered manner.

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 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 are each aligned and that the alignment line of the individual guide lamellae 13 in the middle of the intermediate space, the so-called tube, of the assigned stop plates 12 and the alignment lines 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 a plurality of rods 17, as shown in the illustration, 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 lamellar combs 10 or 11 in the warp threads 4 into one of its two end positions. In this end position, the relevant warp threads 4 lie within its tube on the left or right of the lamellae 12 or 13 delimiting this tube and, as a result of the displacement of half a tube pitch between the successive lamella combs 10 and 11, will surely enter the correct tube of the next tube 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 much less energy is required to adjust it 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 is already limiting 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 111 and 11 ₂ with guide lamellae 13 and the lamella comb 10 running between them with stop lamellae 12. The warp threads 4 drawn with double lines, which are located in the slat comb 11 that have been immersed in the warp threads for some time, are each in the high position, are guided through the rod 17, the warp threads 4 shown with a single line are located in the slat comb 11 , each in the low position and are guided by the rod 17 ₂ . As has already been said. For reasons of clarity, the other two rods 17 shown in FIG. 1 have been 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 lamella comb 10, like the lamella comb 11, is fully immersed in the warp threads 4 and that the lamella comb 112 will soon be immersed in the warp threads 4, the warp threads 4 guided by the rod 17 ₁ in the deep and from the rod 17 ₂ guided warp threads 4 should reach the high position.

In order to achieve this, the rods 17 and 17 _{2 have to 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 led by the rod 17 Warp threads 4 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-apart 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 112 with a compartment holding element 14 for the high position and the other in one with one Compartmental organ 15 arrives for the deep compartment.

If the warp threads 4 guided by the rod 17 ₁ in the lamellar comb 11 _{2 are} to go up and the warp threads 4 guided by the rod 17 ₂ are to reach the down 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 1 72 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, which run parallel to the longitudinal axis of the rotor and thus to the weft insertion direction, for receiving the lamellar combs 10 and 11, respectively. 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 retaining members 15 (FIG. 3) for the low-level position can be dispensed with, since the warp threads 4 are supported in the low-level position as shown in FIG. 4, through the jacket of the roller 20 can be done. The individual lamellar combs 10 and 11 have, instead of the compartment holding members 15 (FIG. 3) for the low 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 are provided with a recess 19 for the high shed position of the warp threads 4. These recesses 19 form a channel for the weft insertion for each lamella comb 11. Furthermore, it can be seen that two guide slats 13 alternate between a shed retaining element 14 for the high shed position of the warp threads 4 and a spacer element 24, and that two stop slats 12 also delimit a spacer element 24.

4, the stop lamellae 12 of the adjacent lamella comb are each aligned with the tube center 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 lamella combs, in the tube between two guide fins 13 both warp threads 4 are located together either in the high or the low position, in the tube between two stop lamellae 12 there is in each case 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 Vertical or all warp threads in the low position - can be realized.

Each lamella comb 11 is constructed from compartment holding members 14 for the high position, from guide lamellae 13 and from spacer elements 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 lamellae of the other lamella 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 jacket 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 17 projecting beyond the lateral surface of the roller 20 after their foot part.

The upper part 25 of the shed holding 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. From below, the guide channel 19 is delimited 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 approximately 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. However, a web rotor of this type would have to be completely removed, disassembled, reassembled and reinstalled practically every time the article was changed.

Claims (2)

1. Linear shed weaving machine with a weaving rotor having shed-retaining elements for holding the warp threads over a predetermined path in selective upper and lower shed positions and being arranged alternately within lamellae combs, with a control means disposed forwardly of the weaving rotor with respect to the running direction of the warp threads for the lateral deflection and allocation of each warp thread to a shed-retaining element determining the upper or the lower shed position, characterised in that the control means (3) comprises rod members (17) extending in the direction of weft insertion and being displaceable in this direction, said rod members being connected to a controlled actuation mechanism (18) and being provided with guide eyelets for the warp threads (4).

2. Linear shed weaving machine according to claim 1, characterised in that the actuation mechanism (18) is formed in the manner of a conventional dobby.

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