阅读说明：本技术 织机和带有配套的纱线张紧装置的储纱装置的布置结构 (Arrangement of a weaving machine and a yarn storage device with a matching yarn tensioning device ) 是由 M.帕门蒂尔 C.博杜因 于 2020-06-05 设计创作，主要内容包括：本发明涉及一种织机(1)和储纱装置的布置结构,该储纱装置包括具有并列的储纱器(5)的竖直侧翼(30b)、(30c)以及布置在储纱器(3)与织机(1)之间的空间内的配套的纱线张紧装置(6),该纱线张紧装置(6)包括承载至少一排并列的纱线张紧元件(8)、(9)的至少一个纱线张紧模块(7)、(20),其中所述一排纱线张紧元件(8)、(9)的方向(R1)、(R2)相对于与所述竖直侧翼(21b)、(21c)所在的平面(V1)、(V2)平行或重合的竖直平面具有一个倾角(α)和/或与该竖直平面形成一个锐角(β)。(The invention relates to an arrangement of a weaving machine (1) and a yarn storage device, comprising a vertical wing (30b), (30c) with a juxtaposed yarn storage (5) and a complementary yarn tensioning device (6) arranged in the space between the yarn storage (3) and the weaving machine (1), which yarn tensioning device (6) comprises at least one yarn tensioning module (7), (20) carrying at least one row of juxtaposed yarn tensioning elements (8), (9), wherein the direction (R1), (R2) of the row of yarn tensioning elements (8), (9) has an inclination angle (alpha) and/or forms an acute angle (beta) with a vertical plane parallel to or coinciding with the plane (V1), (V2) in which the vertical wing (21b), (21c) lies.)

1. An arrangement of a weaving machine (1) and a yarn storage device (3) with an associated yarn tensioning device (6), wherein the yarn storage device (3) comprises at least one yarn storage unit (30) - (37) having a front face (30a) facing the weaving machine (1) and at least one vertical flank (30b), (30c) configured to hold a plurality of yarn storages (5) in a juxtaposed position, characterized in that:

-the yarn tensioning device (6) comprises at least one yarn tensioning module (7), (20), said at least one yarn tensioning module (7), (20) having at least one carrier (71), (72) carrying at least one row of juxtaposed yarn tensioning elements (8), (9); (21) (22) in the above-mentioned order,

-each yarn tensioning module (7), (20) is arranged in the space between the yarn storage (3) and the weaving machine (1), and

-each carriage (71), (72); (21) (22) are arranged such that the direction (R1), (R2) of the row of yarn tensioning elements (8), (9) has an inclination angle (a) and/or forms an acute angle (β) with a vertical plane parallel to or coinciding with the plane (V1), (V2) in which the vertical wings (21b), (21c) lie.

2. Weaving machine and yarn storage arrangement with associated yarn tensioning device according to claim 1, characterized in that each carrier (71), (72); (21) -the respective warp thread (11), (12) can access the thread tensioning elements (8), (9) on the outer side, and each bracket (71), (72) comprises a substantially flat surface constituting the outer side of the thread tensioning module (7), (20); (21) and (22) are arranged in such a way that the surface of the bracket has an inclination angle (alpha) when viewed in a vertical cross-section of the yarn tensioning module (7), (20) and/or forms an acute angle (beta) with a vertical plane parallel to or coinciding with the plane (V1), (V2) in which the vertical flank (21b), (21c) lies when viewed in a horizontal cross-section of the yarn tensioning module (7), (20).

3. Arrangement of a weaving machine and a yarn storage with an associated yarn tensioning device according to claim 2, characterized in that the yarn tensioning module (20) comprises two brackets (21), (22) with substantially flat surfaces forming the respective outer sides of the yarn tensioning module (20), the brackets (21), (22) being arranged in such a position that their respective surfaces have an inclination angle (α) as seen in a vertical section of the yarn tensioning module (20) and taper towards one another in the direction of the weaving machine (1).

4. The arrangement of a weaving machine and a yarn storage with an associated yarn tensioning device according to claim 2, characterized in that the yarn tensioning module (7) comprises two brackets (71), (72) with substantially flat surfaces forming the respective outer sides of the yarn tensioning module (7), the brackets (71), (72) being arranged in such a position that their respective surfaces, viewed in a horizontal section of the yarn tensioning module (7), form an acute angle (β) with a vertical plane parallel to or coinciding with the plane (V1), (V2) in which the vertical flanks (21b), (21c) lie, and taper gradually towards one another in the direction of the weaving machine (1).

5. Weaving machine and yarn storage arrangement with associated yarn tensioning device according to claim 3 or 4, characterized in that the two carriages (71), (72); (21) and (22) have mutually tapering surfaces which are almost adjacent to one another, so that the thread tensioning modules (7), (20) have a substantially V-shaped profile when viewed in cross section.

6. The arrangement of a weaving machine and a yarn storage with an associated yarn tensioning device according to one of the preceding claims, characterized in that each warp yarn (11), (12) is guided in the untensioned state from the yarn storage (5) to the yarn tensioning elements (8), (9).

7. Arrangement of a weaving machine and a yarn storage with an associated yarn tensioning device according to one of the preceding claims, characterized in that the yarn storage (3) comprises at least two spaced-apart juxtaposed yarn storage units (30) - (37).

8. Arrangement of a weaving machine and a yarn storage with an associated yarn tensioning device according to one of the preceding claims, characterized in that the yarn tensioning device (6) comprises at least two spaced-apart yarn tensioning modules (7), (20) which are arranged side by side or one above the other.

9. Arrangement of a weaving machine and a yarn storage with associated yarn tensioning device according to one of the preceding claims, characterized in that each yarn tensioning element (8), (9) comprises an inlet (85), (94) and an outlet (86), (95) for a warp yarn (11), (12), and that, for each yarn tensioning element (8), (9), the warp yarn (11), (12) supplied from the yarn storage (5) is guided either to a carrier (71), (72) in which the outlet (86), (95) is located; (21) inlets (85, 94) on the side of (22), or through brackets (71, 72) from the bracket side opposite to the bracket side where outlets (86, 95) are located; (21) and (22) lead to the inlets (85), (94).

10. Arrangement of a weaving machine and a yarn storage with an associated yarn tensioning device according to one of the preceding claims, characterized in that a yarn guide (10) is provided between the at least one yarn storage (5) and the yarn tensioning elements (8), (9), and that the yarn guide (10) is configured to guide and protect warp yarns along almost the entire path from the yarn storage to the yarn tensioning elements.

11. Arrangement of a weaving machine and a yarn storage with an associated yarn tensioning device according to claim 9, characterized in that the yarn guide (10) is tubular.

12. Arrangement of a weaving machine and a yarn storage with an associated yarn tensioning device according to one of the preceding claims, characterized in that each yarn tensioning element (8), (9) comprises a roller (81), (91) which is driven by an electric motor (80), (90) and which is configured to rotate in one direction of rotation or the other while remaining in contact with at least one warp yarn (11), (12) in order to move the warp yarn (11), (12) in the direction opposite to the warp yarn supply direction or in the same direction as the warp yarn supply direction (F), respectively, or simultaneously with the movement of the warp yarn, or to contribute to the movement of the warp yarn in order to increase or decrease the yarn tension in the warp yarn (11), (12), respectively.

13. Arrangement of a weaving machine and a yarn storage with an associated yarn tensioning device according to one of the preceding claims, characterized in that the yarn tensioning modules (7), (20) are arranged in a space between the yarn storage (3) and the weaving machine (1) which is delimited laterally by parallel vertical surfaces in contact with the flanks (30a), (30b) of the farthest yarn storage (2).

14. Arrangement of a weaving machine and a yarn storage with an associated yarn tensioning device according to one of the preceding claims, characterized in that the yarn storage is a creel (3).

Technical Field

The invention relates to an arrangement of a weaving machine and a yarn storage device with an associated yarn tensioning device, wherein the yarn storage device comprises at least one yarn storage unit having a front face facing the weaving machine and at least one flank configured to hold a plurality of yarn stores in a juxtaposed position along the plane of the flank.

Background

One known arrangement comprises a creel in which a large number of different yarn packages are arranged. A winding of yarn is wound onto each bobbin, from which a warp yarn is delivered to the loom through a plurality of guide meshes and grids. During weaving on a loom, the warp yarns are incorporated into the fabric while the required amounts of the various warp yarns are supplied from the respective different bobbins. The creel consists of a plurality of supporting structures (also known as doors) arranged side by side at a certain distance from each other. Each support structure has a front face of relatively limited width facing the weaving machine and two side wings extending from said front face in a direction away from the weaving machine. The creels are arranged in such a way that the bobbins of each side wing are arranged alongside one another along the vertical surface of the side wing (or in other words, viewed in a direction perpendicular to the surface of the side wing).

Such creels are also combined with means for controlling the tension in the warp yarns. In a conventional yarn tensioning device, a small weight is placed on each warp yarn in the creel. As a result, a constant force is exerted on each warp yarn to maintain the warp yarn under tension. The placing of these small weights is time consuming and furthermore it does not allow a quick adjustment of the yarn tension according to changing conditions during the weaving process. Thus, the yarn tension of some warp yarns is much higher than required to ensure a smooth weaving process, at least during some parts of the weaving process.

Yarn tensioning elements are provided with which the tension in the warp yarns can be controlled for each warp yarn or group of warp yarns. These yarn tensioning elements comprise rollers driven by an electric motor and configured to rotate in one direction of rotation or the other while remaining in contact with at least one warp yarn, to move the warp yarn in the opposite direction or in the same direction, respectively, as the warp yarn supply direction, so as to increase or decrease, respectively, the yarn tension in said warp yarn. Such a yarn tensioning element is described in international patent application WO 2017/077454 a 1. In creels with a large number of bobbins, there is not enough space available to provide such a yarn tensioning element for each warp yarn in the creel. Otherwise the creel must be made larger.

Disclosure of Invention

The object of the present invention is to overcome the above-mentioned disadvantages and to provide an arrangement of a yarn storage device and a matching yarn tensioning device which allows a flexible adjustment of the yarn tension and which is also compact.

This object is achieved by providing an arrangement of a weaving machine and a yarn storage device with an associated yarn tensioning device, wherein the yarn storage device comprises at least one yarn storage unit having a front face facing the weaving machine and at least one vertical side wing configured to hold a plurality of yarn storages in a juxtaposed position, wherein, according to the invention, the yarn tensioning device comprises at least one yarn tensioning module having at least one carrier carrying at least one row of juxtaposed yarn tensioning elements, wherein each yarn tensioning module is arranged in the space between the yarn storage and the weaving machine and each carrier is arranged such that the direction of the row of yarn tensioning elements has an inclination with respect to and/or forms an acute angle with a vertical plane parallel to or coinciding with the plane in which the vertical flank lies.

A number of warp threads are supplied from the yarn storage device to the yarn tensioning element at a small pitch and these warp threads are likewise fed from the yarn tensioning element to the weaving machine at a small pitch. Due to the oblique arrangement of the thread tensioning elements of the row, successive thread tensioning elements in a row are brought to different heights. In this case, the difference in vertical position between successive yarn tensioning elements may be very small. Thus, the respective supplied warp yarn easily approaches and reaches each yarn tensioning element through a minimum number of bends, and each delivered warp yarn can also be delivered to the weaving machine through a minimum number of bends.

A similar advantageous effect can be obtained with an arrangement forming an acute angle with a vertical plane parallel to or coinciding with the plane in which the vertical flank lies. Due to the oblique arrangement of the thread tensioning elements of the row relative to the side wings, successive thread tensioning elements in a row are brought into a position which is horizontally offset relative to each other and relative to the vertical plane in which the side wings lie. Such a difference in horizontal position between successive yarn tensioning elements may be very small. Thus, the respective supplied warp yarn easily approaches and reaches each yarn tensioning element through a minimum number of bends, and each delivered warp yarn can also be delivered to the weaving machine through a minimum number of bends.

As a result, the warp yarns can be transferred from the yarn storage device to the weaving machine closely together, while ensuring that the positional difference is sufficient to prevent the warp yarns from binding to each other.

Each yarn tensioning element has an inlet through which the supplied warp yarn is introduced in cooperation with the yarn tensioning element and an outlet through which the warp yarn can leave the yarn tensioning element for movement to the weaving machine. By arranging each row of yarn tensioning elements in an inclined manner or obliquely with respect to the vertical plane of the side wings, a vertical position difference or a horizontal position difference, respectively, can be created between successive yarn tensioning elements, which difference is just sufficient for the warp yarns supplied or conveyed close to each other to approach the inlet and/or outlet of each yarn tensioning element along a horizontal straight line.

Since each row of yarn tensioning elements is arranged in an inclined manner or obliquely with respect to a vertical plane extending in the direction of the side flap, a large number of yarn tensioning elements only occupy a limited width or height. Thus, the increase of the yarn tensioning element has little effect on the height or width of the yarn tensioning device.

In a preferred embodiment of the arrangement according to the invention, each carrier comprises a substantially flat surface which forms an outer side of the yarn tensioning module, on which outer side the yarn tensioning elements can be used for supplying and/or conveying the respective warp yarns, and is arranged in such a position that said surface has an inclination, viewed in a vertical cross-section of the yarn tensioning module, and/or forms an acute angle, viewed in a horizontal cross-section of the yarn tensioning module, with a vertical plane parallel to or coinciding with the plane in which said vertical flank lies.

As a result, the thread tensioning elements can be arranged in rows with the above-mentioned directions, while they are also easily accessible on the outside of the thread tensioning module, since the brackets are arranged at an angle or at an inclination with respect to the vertical plane of the side wings.

In a first particular embodiment, the yarn tensioning module comprises two carriages having substantially flat surfaces forming respective outer sides of the yarn tensioning module, the carriages being arranged in such a position that their respective surfaces have an inclination, viewed in a vertical section of the yarn tensioning module, and taper towards one another in the direction of the weaving machine.

In a second particular embodiment, the yarn tensioning module comprises two carriages having substantially flat surfaces forming respective outer sides of the yarn tensioning module, the carriages being arranged in such a position that their respective surfaces, viewed in a horizontal cross-section of the yarn tensioning module, form an acute angle with a vertical plane parallel to or coinciding with the plane in which the vertical side wings lie, and taper towards each other in the direction of the weaving machine.

The total width of the two carriers is preferably not greater than the width of the yarn storage unit.

In its most preferred embodiment, the first and second particular embodiments are designed such that the two brackets with mutually tapering surfaces almost abut each other, so that the yarn tensioning module has a substantially V-shaped profile, viewed in cross section.

In a very preferred embodiment, each warp thread is guided in a non-tensioned state from the storage to the thread tensioning element.

The yarn storage device has larger distribution volume on the yarn storage device. If a plurality of yarn storage units are arranged next to one another, the volume is also relatively wide. With the known prior art arrangement, the warp yarns extend under tension at a large angle to the horizontal straight from the top and bottom yarn storage to the first guide grid at the weaving machine. By guiding the warp threads in a tensionless state from their respective storage to a thread tensioning element arranged in the space between the storage and the weaving machine, the warp threads in this space can first be gathered together in a more limited volume of the thread tensioning device to subsequently travel under tension from this limited volume to the weaving machine. Thus, the yarn storage device can be arranged closer to the weaving machine without causing any harmful effects. Since the space occupied by the warp yarn portions under tension is also smaller, the space around these warp yarns is released, as a result of which other components (e.g. the creel) arranged in the space between the yarn tensioning device and the weaving machine become more accessible.

The yarn storage device may for example comprise at least two spaced-apart juxtaposed yarn storage units.

Furthermore, it is also possible to design the thread tensioning device with at least two spaced apart thread tensioning modules side by side or one above the other. Thus, a large number of yarn tensioning elements are distributed over a plurality of modules, so that they are more accessible for maintenance and repair.

In a particular embodiment, each yarn tensioning element comprises an inlet and an outlet for warp yarns, and, for each yarn tensioning element, warp yarns supplied from the yarn store are guided to the inlet on the side of the carrier on which the outlet is located. This may be useful if a side of the carrier is inaccessible for supplying or transporting warp yarns, or is difficult to access. This also ensures that the tension in the warp yarns increases only slightly.

In another embodiment, the supplied warp yarns are guided through the carriers to the inlet from the side of the carriers opposite to the side of the carriers where the outlet is located.

In this case, the yarn tensioning element can be designed and integrated in the carrier such that the warp yarns pass through the carrier in a direction almost perpendicular to the surface of the carrier, whereby the warp yarns are turned at a large angle at the inlet and outlet. These bends create significant friction and thus add considerable additional tension. This may be desirable for arrangements requiring higher yarn tensions. In this way, the yarn tensioning element does not have to provide all the yarn tension.

In a preferred embodiment, a yarn guiding device is provided between at least each yarn storage and the yarn tensioning element, and the yarn guiding device is configured to guide and protect warp yarns along almost the entire path from the yarn storage to the yarn tensioning element. The main function of the guide element is to guide the tensionless warp yarn while avoiding the risk of its contact with other warp yarns. The guide element may have an open or closed structure.

The yarn guide is, for example, tubular. Preferably it is a flexible element.

In a particularly preferred embodiment, each yarn tensioning element comprises a roller driven by an electric motor and configured to rotate in one direction of rotation or the other while remaining in contact with at least one warp yarn, to move the warp yarn in the opposite direction or in the same direction as the warp yarn supply direction, or simultaneously with the movement of the warp yarn, or to contribute to the movement of the warp yarn, in order to increase or decrease, respectively, the yarn tension in said warp yarn.

The motor-driven roller is also called a brake roller.

In an advantageous embodiment, a yarn tensioning module is arranged in the space between the yarn storage device and the weaving machine, which is laterally delimited by parallel vertical surfaces in contact with the side wings of the farthest yarn storage device.

The yarn storage device can be a creel in particular. In this case, the yarn storage is a bobbin around which the respective yarn storage is wound.

The yarn on these reels is preferably unwound by pulling it through the head of the reel in the direction of its axis, when the reel is not rotating (in the "d fil" condition). The guide means are preferably arranged on the axis of the package. This generally ensures a more stable and lower yarn tension than the radial spreading ("draule") during the rotation of the package. This is because the radial expansion requires a greater force. The angle at which the yarn enters the guide also varies depending on the position at which the yarn is taken from the package. This position varies periodically, thus resulting in a sinusoidal variation in tension.

Preferably, the motor driving the brake roller to maintain the yarn under tension is operable in a generator mode of operation to maintain the yarn under tension. By using an electric motor providing an adjustable torque to the brake roller it is easier to react to deviations and/or variations in the yarn characteristics and/or variations in the yarn path and/or variations in the weaving machine behaviour. For example, the torque of the motor may be much lower when the machine is stationary (just enough to keep the yarn taut) than when the machine is running.

In order to recover the yarn from the loom, which is necessary, for example, due to shed formation, the motor may also be operated in a motor operating mode to move the yarn in a direction opposite to the yarn supply direction. Furthermore, it is useful to have the motor operate in a motor run mode to move the yarn in the feed direction to remove additional yarn from the yarn storage system. Preferably, a central control unit is also provided, preferably also comprising means for enabling the control unit of the yarn tensioning system to immediately obtain the energy generated during the operating condition of the electric motor in the generator.

Preferably, a measuring device is also provided for determining the length of the thread taken out by the weaving machine. For each brake roller, the length of yarn held under tension by the brake roller can be calculated from the number of revolutions of the brake roller or the angle of rotation of the motor and the diameter of the brake roller without the need for an additional length measuring sensor. For this purpose, the measuring device comprises, for example, the necessary computing device for this purpose.

Preferably, communication means are also provided for receiving signals from the weaving machine regarding the operation and/or position of the machine, measuring means for measuring parameters related to the operation of the yarn tensioning device, and tension monitoring means for monitoring operating parameters of the yarn tensioning device with respect to the signals received from the weaving machine. The signals related to the operation of the weaving machine represent the current state of the weaving machine and may be related to the machine being stationary, the machine being operated, the speed of the machine, the position of the main shaft of the weaving machine, the phase of the weaving process, etc.

The tension monitoring device is preferably further configured to predict the expected operation of the yarn tensioning device based on the current status reported by the weaving machine. Most preferably the yarn tensioning device is provided with a tension measuring device for measuring the tension of the yarn. By measuring the yarn tension, different additional detection systems can also be provided. Thus, for example, not only yarn breakage and/or yarn over-tensioning can be detected using the measured yarn tension, but also yarn irregularities or knots. For example, the same brake roller may also be used to hold multiple yarns having the same yarn characteristics and traveling along the same path under tension.

The motor of the yarn tensioning system of the invention is preferably a dc motor or a brushless ac motor. More preferably the motor is a brushless dc motor, even more preferably a brushless dc motor having an outer rotor provided with hall sensors (a motor in which the stator is fixed and the rotor is rotating), preferably the motor is designed as a disk motor, because this motor has the advantages of compactness and economic feasibility and releases or requires little energy in the present application.

By minimizing yarn slippage on the brake roller, a constant yarn tension can be maintained regardless of yarn characteristics, and the accuracy of any measurements can be improved. There are several ways to reduce yarn slippage on the brake roller. Alternatively or additionally, the brake roller may be designed to have the yarn wound thereon multiple times. Alternatively or additionally, the brake roller may comprise a running surface provided with an anti-slip layer and/or configured with a profile.

The invention will now be explained in more detail with the following detailed description of possible embodiments of the arrangement of the weaving machine and the yarn storage with associated yarn tensioning device according to the invention.

Drawings

In this detailed description, reference is made to the accompanying drawings using reference numerals, wherein:

■ fig. 1 to 3 show different views of a yarn tensioning element in which the inlet and outlet of warp yarns are located on the same side of the yarn tensioning element and the warp yarns are conveyed to the inlet through the same side;

■ fig. 4 shows a top view of the yarn tensioning element of fig. 1-3 integrated in a carrier of the yarn tensioning device;

■ fig. 5 to 7 show different views of a yarn tensioning element in which the inlet and outlet of warp yarns are located on the same side of the yarn tensioning element and warp yarns are transferred from the other side to the inlet of the yarn tensioning element;

■ fig. 8 shows a schematic side view of an arrangement of a weaving machine and a creel with an associated yarn tensioning device, wherein the vertical structure of the yarn tensioning device has a V-shaped profile;

■ FIG. 9a shows a schematic top view of the arrangement shown in FIG. 8;

■ FIG. 9b shows an enlarged top view of one of the sets of yarn tensioning modules of FIG. 9 a;

■ fig. 10a shows a schematic side view of an arrangement of a weaving machine and a creel with an associated yarn tensioning device, wherein the horizontal structure of the yarn tensioning device has a V-shaped profile;

■ FIG. 10b shows an enlarged side view of the yarn tensioning module of FIG. 10 a; and

■ fig. 11 shows a schematic top view of the arrangement shown in fig. 10 a.

Detailed Description

Fig. 1 to 3 show an embodiment of the thread tensioning element (8) and a part of the guide tube (10) and a part of the warp thread (11) cooperating with the thread tensioning element (8). Fig. 1 is a side view, fig. 2 is a top view, and fig. 3 is a perspective view.

The yarn tensioning element (8) comprises a motor (80) for driving the brake roller (81) in rotation and a non-driven rotatable pinch roller (82) located beside the brake roller (81). The warp threads (11) are transported from a storage (not shown in fig. 1-3) in the supply direction (F) through the guide tube (10) up to the vicinity of the thread tensioning element (8). After leaving the guide tube (10), the warp thread (11) first passes the surface of the pinch roller (82), then passes between the pinch roller (82) and the brake roller (81), finally passes the surface of the brake roller (81), leaves the brake roller (81) after about half a revolution of the brake roller (81), and continues to travel towards the weaving machine (1) via the guide eyelet (83) in a direction with little difference from the feeding direction (F). During the passage of the warp yarn (11) between the pinch roller (82) and the brake roller (81), the warp yarn (11) is sandwiched between the two rollers (81), (82), so that the warp yarn (11) moves together with the brake roller (81) without slipping. Furthermore, a bracket (84) is provided, which has two guide walls (84a), (84b) extending on respective sides of the pinch roller (82). These components are necessary in order to be able to recover the warp yarns.

If the braking roller (81) is driven by the motor (80) to rotate in a clockwise direction, it draws back the warp yarns (11) in a direction opposite to the feeding direction (F), thus recovering the yarns. If the loom (1) pulls the warp (11) forward in the feed direction (F), the brake roller (81) rotates in the counterclockwise direction and the motor is in generator operation. By driving the motor (80) in cooperation with the control unit, the yarn tension of each warp yarn (11) can be independently controlled or adjusted as a function of one or more conditions or factors affecting the yarn tension, in particular the weaving state of the respective warp yarn, the position of the warp yarn on the weaving machine, the resistance encountered during the movement of the warp yarn in the supply direction, etc.

The deflection direction of the warp threads (11) when the inlet (85) of the thread tensioning element leaves the guide tube (10) is approximately the same as the direction of travel of the warp threads (11) when the outlet (86) leaves the thread tensioning element (8) through the guide eye (83). Furthermore, the inlet (85) and the outlet (86) are arranged such that the warp yarns (5) are located on the same side of the yarn tensioning element (1) at the inlet (85) and the outlet (86). Such a yarn tensioning element (1) is therefore easily integrated in the carriers (71), (72) so that warp yarns supplied from a yarn storage on the side of the carrier where the outlet is located are transferred to the inlet (see fig. 4).

Fig. 5 to 7 show another yarn tensioning element (9) and a part of the guide tube (10) and a part of the warp yarn (11) cooperating with the yarn tensioning element (9). Fig. 5 is a front view, fig. 6 is a perspective view, and fig. 3 is a plan view.

The yarn tensioning element (9) also comprises a motor (90) for driving the brake roller (91) and an undriven rotatable pinch roller (92) located beside the brake roller (91). The warp threads (11) are transported from a storage (not shown) through a conduit (10) up to the vicinity of the thread tensioning element (9). The catheter (10) extends first in the supply direction (F) and is deflected at the tip by approximately 90 deg.. After leaving the guide duct (10), the warp yarns (11) are first deflected so as to be brought between the pinch roller (92) and the brake roller (91) in a direction almost opposite to the feeding direction (F), and are sandwiched between these rollers (91), (92), then pass over the running surface of the brake roller (91), and leave the brake roller (91) after more than half a revolution of the brake roller (91), and continue to travel in the feeding direction (F) via the guide eyelets (93).

The direction of travel of the warp threads (11) when leaving the guide duct (10) at the inlet (94) is substantially perpendicular to the direction of travel of the warp threads (11) when leaving the thread tensioning element (9) at the outlet (95) via the guide eye (93). Such a yarn tensioning element (9) is therefore easily integrated in the carriers (71), (72) so that the outlet (95) is located on one side of the carriers, while warp yarns from the other side of the carriers are conveyed through the carriers (71), (72) to the inlet (94).

In a first arrangement of the invention (see fig. 8, 9a and 9b), the weaving machine (1) is arranged beside the creel (3) in cooperation with the jacquard (2). A beam frame (4) is arranged in the intermediate space between the weaving machine (1) and the creel (3), the beam frame (4) comprising yarn storages arranged on four different rollers (40) - (43) for warp yarns used equally and regularly on the weaving machine (1) during the weaving process.

The creel (3) contains a large number of bobbins (5), these bobbins (5) containing yarn storages for warp yarns wound thereon which are used unequally and irregularly during weaving. The creel (3) contains eight creel units (30) - (37), also known as doors, which are arranged side by side at a certain distance from each other (see fig. 9 a). Each creel unit (30) - (37) has a front face (30a) facing the loom (1) and two vertical side wings (30b), (30c) extending perpendicular to the front face (30 a). Each side wing (30b), (30c) contains the support necessary to arrange a large number of reels (5) side by side in horizontal rows one above the other in a fixed position in which they are rotatable.

In fig. 9a, only one creel unit (30) is shown at reference numerals (30a), (30b), and (30 c). The other creel units (31) - (37) are identical, their front and side wings are denoted by reference numeral (30a) and reference numerals (30b) and (30c), respectively.

In the space between the creel (3) and the weaving machine, a yarn tensioning device (6) is arranged, which consists of eight groups (60) - (67) each comprising 16 yarn tensioning modules, each group (60) - (67) consisting of two vertically stacked sequences (I), (II) each comprising eight vertically stacked yarn tensioning modules (7), i.e. a top sequence (I) consisting of eight modules (7) and a bottom sequence (II) consisting of eight modules (7). The two sequences (I) and (II) have a vertical spacing (d) therebetween. Fig. 8 shows a group (60) of 16 modules (7) at the top of fig. 9 a.

In fig. 9a, the yarn tensioning element (9) is shown only in the top group (60). In the other groups (61) - (67) also yarn tensioning elements are arranged in a similar manner, but these are not shown in the figure.

Fig. 9b shows a top view of a group (60) of 16 thread tensioning modules (7) in isolation and in enlargement.

Each set of yarn tensioning modules (60) - (67) is arranged against the front face (30a) of the respective creel unit (30) - (37). Thus, each set (60) - (67) has an associated creel unit (30) - (37).

Each thread tensioning module (7) consists of two plate-like carriers (71), (72) with flat outer surfaces. Each bracket (71), (72) contains a yarn tensioning element (9) for warp yarns supplied from the package (5) of the side wings (30b), (30c) located on the same side. Thus, in fig. 9a, top bracket 71 has mating side wings (30b) and bottom bracket (72) has mating side wings (30 c).

The two brackets (71), (72) are arranged vertically and at an acute angle (β) with respect to the vertical plane (VI), (V2) in which the associated side flaps (30b, 30c) lie, and in this case they taper towards one another in the direction of the loom 1, converging together while forming an angle and abutting one another. The thread tensioning module (7) thus has a V-shaped profile, seen in horizontal cross section, which can be clearly seen in fig. 9a and 9 b.

Each carrier (71), (72) has a number of closely juxtaposed rows of yarn tensioning elements (9). For the sake of clarity, only three yarn tensioning elements (9) are shown for each carrier (71), (72).

The yarn tensioning element (9) is of the type integrated in the carriers (71), (72) such that the outlet (96) is located on one side of the carriers (71), (72) and warp yarns from the other side of the carriers are conveyed through the carriers (71), (72) to the inlet (95) of the yarn tensioning element.

Due to the oblique arrangement of the brackets (71), (72), the direction (R1), (R2) of each row of thread tensioning elements (9) also forms an acute angle (β) with respect to the vertical plane (V1), (V2) in which the associated flank (30b), (30c) lies.

In each creel unit (30) - (37), yarns from a large number of bobbins (5) are transferred to the loom (1) and used as warp yarns to be integrated into the fabric. A respective conduit (10) (not shown in figures 8 and 9) is provided for each warp yarn to guide the warp yarn to the yarn tensioning element (9) in a tensionless condition. In this way, the warp yarns do not touch each other and do not bind to each other.

Due to the oblique arrangement of the thread tensioning elements of one row relative to the associated flanks (30b), (30c), successive thread tensioning elements (9) of one row are brought into a position which is horizontally offset relative to each other and relative to the vertical plane (V1, V2) in which the associated flanks (30b), (30c) lie. Thus, the respective warp yarn supplied from the side flaps (30b), (30c) is easily accessible to each yarn tensioning element (9), and each delivered warp yarn can also be delivered to the weaving machine with a minimum number of bends. As a result, the warp yarns can be transferred from the yarn storage device to the loom without binding each other while being closely arranged together.

The warp yarns are moved from the yarn tensioning element (9) to a first grid (13) having a width and height (see fig. 8 and 9a) smaller than the width and height of the creel (3). In fig. 8, the top warp yarns (11) travelling from the top yarn tensioning module (7) to the grid (13) and the bottom warp yarns (12) travelling from the bottom yarn tensioning module (7) to the grid (13) are shown. Fig. 9a schematically shows a region (14) in which warp yarns are moved from their paths from different groups (60) - (67) of yarn tensioning modules (9) to the first grid (13).

The warp threads (11), (12) run from the first grid (13) to a second grid (15) which has the same width as the first grid (13) but a smaller height. The warp threads (11), (12) run from the second grid (15) to the weaving machine (1) where they are drawn through the eyes of the respective heddles (16), (17), the heddles (16), (17) being symbolically represented by vertical lines with a circular widening representing the heddle eye. A respective return spring (18), (19) exerts a downward force on each heddle (16), (17).

Alternatively, the thread tensioning device (6) can also be located in the space between the creel (3) and the creel (4) at a distance from the creel (3). At this time, the preferably grouped yarn tensioning modules (60) - (67) are located in the space occupied by the warp yarns on the warp yarn path from the creel to the loom in the prior art. More preferably, the space occupied by the yarn tensioning module is smaller than the space occupied by the warp yarns of the prior art at a similar distance from the weaving machine on the yarn path from the creel to the weaving machine. The number of sets of yarn tensioning modules or the number of yarn tensioning modules per set of yarn tensioning modules is determined by the application.

In a second arrangement of the invention (see fig. 10a, 10b and 11), the loom (1) co-operating with the jacquard (2) is also arranged beside the creel (3), and the same creel (4) as in the first arrangement (fig. 8 and 9) is arranged in the intermediate space between the loom (1) and the creel (3). The creel (3) also has the same layout as the first arrangement described above with reference to figures 8 and 9.

In the space between the creel (3) and the weaving machine (1) a yarn tensioning device (6) is arranged, which consists of a yarn tensioning module extending in a horizontal direction almost parallel to the vertical plane in which the front faces (30a) of the eight creel units (30) - (37) lie.

The thread tensioning module (20) consists of two plate-like carriers (21), (22) with flat outer surfaces. The two brackets (21, 22) are arranged at opposite inclinations (alpha) with respect to each other so that they taper towards each other symmetrically with respect to the horizontal in the direction of the weaving machine (1), converging together while being angled and abutting each other. The yarn tensioning module (20) thus has a V-shaped profile, as seen in vertical section, which can be clearly seen in fig. 10a and 10 b.

Alternatively, the yarn tensioning device (6) may consist of a plurality of yarn tensioning modules (20) distributed along the entire width of the weaving machine. Each carrier (21), (22) has a plurality of closely juxtaposed rows of thread tensioning elements (8). For the sake of clarity, only three yarn tensioning elements (8) are shown for each carrier (21), (22).

The yarn tensioning element (8) is of the type integrated in the carriages (21), (22) so that the outlet (86) is located on one side of the carriages (21), (22) and the warp yarns on the same side of the carriages are conveyed to the inlet (85) of the yarn tensioning element.

Due to the inclined arrangement of the carriers (21), (22), the direction (R1), (R2) of each row of thread tensioning elements (8) also forms an inclination angle (α) with respect to the horizontal plane, or in other words, an acute angle.

With this arrangement, a respective guide tube (10) (not shown in fig. 10 and 11) is also provided for each warp yarn to guide the warp yarn to the yarn tensioning element (8) in a tensionless state. In this way, the warp yarns do not touch each other and do not bind to each other.

Due to the oblique arrangement of the thread tensioning elements of the row, successive thread tensioning elements (8) in a row are brought into a position offset in the vertical direction relative to each other. Thus, each yarn tensioning element (8) is easily accessible for the respective warp yarn supplied from the yarn store, and each warp yarn being conveyed can also be conveyed to the weaving machine with a minimum number of bends. As a result, the warp yarns can be transferred from the yarn storage device to the loom without binding each other while being closely arranged together.

The warp threads are moved from the thread tensioning element (8) up to a grid (100) which has the same width as the thread tensioning modules, but a smaller height. The warp threads (11), (12) run from the grid (100) to the weaving machine (1) where they are drawn through the eyes of the respective heddles (16), (17), the heddles (16), (17) being symbolically represented by vertical lines with a circular widening representing the heddle eye. A respective return spring (18), (19) exerts a downward force on each heddle (16), (17).

According to the prior art, the warp yarns are supplied in a stretched state from a creel (3) to a first grid. Fig. 10a shows this situation of the prior art, in which the straight line (S1) from the uppermost row of bobbins in the creel (3) passes first through the grid (X) of the existing layout and then onto the grid (100); the straight line (S2) passes from the bottom row of bobbins in the creel (3) through the grid (X) of the existing layout and then onto the grid (100). More clearly, the grid (X) is not part of the arrangement of the invention, but is merely added to demonstrate the effect of the invention compared to the prior art.

The lines (S1), (S2) show that in the prior art the warp yarns are brought to the grid (X) at a large angle (relative to the horizontal) and then reach the grid (100), and that the supplied warp yarns thus subsequently occupy a large height.

Fig. 11 illustrates the prior art situation with a straight line (T1) extending from the bobbin in the top creel unit (30) to the prior art grid (X) and a straight line (T2) extending from the bobbin in the bottom creel unit (37) to the prior art grid (X). These lines (T1), (T2) show that in the prior art the warp yarns are brought to the grid (X) at a large angle (with respect to the vertical plane) and that the supplied warp yarns thus subsequently occupy a large width.

Since the warp yarns of the invention are brought from the creel (3) in a tensionless state (obviously, in which the warp yarns should not be stretched) to a smaller volume of yarn tensioning means (6) located in the intermediate space between the creel (3) and the loom (1), the warp yarns can be supplied in a smaller volume (in terms of height and width). The movement of the warp threads in the tensionless state takes place in a guide tube (10), which is symbolized by a curve in fig. 10 and 11. Thus, space for accessing the creel (4) and the like is saved. Furthermore, this makes it possible to arrange the creel (3) closer to the loom.