BG60328B2 - Method and device for manufacture of carpets with nap tying - Google Patents

Abstract

The method and device are intended for the textile industry. In carrying out the method for producing carpets with a knotted pile, velour threads are tied around at least one warp thread (1 and 2). Each velour thread is tied using a tying gripper (49) around at least one first warp thread (1). Before tying, the velour thread is cut, and the first and second warp threads (1 and 2) are shifted towards the velour thread, after which they are separated from each other. The velour thread is bent around the first and second warp threads (1 and 2). The tying gripper (49) is led between the first and second warp threads (1 and 2) and the ends of the velour thread are gripped. The warp threads are returned to their original position. The tying gripper (49) ties the velour thread and leads it to a weft thread. The device includes a thread distributor (4) located in front of a device for cutting the suede threads, connected to a tying station equipped with a tying gripper (49) gripping and tying the ends of the cut suede thread, which is bent around the first (1) and second main thread (2) by means of a bending device (17). A device for moving (44) the main threads (1 and 2) is also provided. 21 claims, 27 figures

Description

The invention relates to a method for the production of knitted flora carpets, wherein the filaments, especially suede threads, are cut and tied around at least one main thread, each thread being threaded to one area of the main filaments in which make the binding, and then it is tied by means of a binding clamp around at least one first major thread in said area. The invention also relates to a device for carrying out the method.

The method and apparatus described in European Patent Application No. 0 098 245 are known. According to the known method, suede threads coming from a single threading station are driven through the main threads, in particular the weave of a ditch, into an area where tying must be carried out. Then the thread is caught by a needle and tied around two main threads by means of a tying clamp.

A disadvantage of the known method and device is that relatively complex machines are required to perform complex motions, which makes these machines expensive and require continuous maintenance.

It is an object of the invention to provide a simplified method and device for its implementation in the manufacture of knitted florals.

According to the method of the invention, before the suede thread, the first main thread and a second main thread adjacent to the first main thread are moved to the suede thread, the first and second main thread are then separated from each other, and the binding gripper is then leads between the first and second main filaments and the ends of the suede thread are gripped by the binding clamp, and the main filaments are then returned to their starting position while the binding clamp moves and binds the thread for applying a tension to said thread and taking it to the nearest weft thread. The displacement of the two main strands is an operation that does not require complex means, which results in the use of simplified means of tying. Since the first and second main threads are displaced with respect to the other main threads and relative to each other, it is possible to thread the binding clamp between the main threads. Thus, it is possible to run several types of nodes, such as the Giordez Node or the Seine Node, from the same machine. The binding itself is made by folding the thread around the two main filaments and grasping the ends of the filament with the help of a binding clamp, which then tightens the filament and leads it to a weft filament where the tied filament lies. These movements allow the use of a single device with a simplified construction, allowing for high operating speeds.

In order to make the Gordese knot according to the method of the invention, the suede thread is tied into loops closed around the first and second main strands by means of said binding gripper.

In order to make a hay knot according to the method of the invention, the suede thread is folded into a closed loop around the first main thread and into an open loop around the second main thread using a snap clamp.

In one embodiment of the method according to the invention, one weft is zigzagged or sinusoidal between the main threads, which makes it easier to place the weft threads.

The device according to the invention includes a displacement device designed to displace the suede thread about at least one first base thread and one second base thread adjacent to the first base thread, and a folding device designed to bend the U-shaped suede thread around the first and the second main strand by means of a binding gripper located on the same side of the main strands as the suede thread and mounted on a transport element designed to drive the binding strand River between the first and second main thread.

In a first embodiment of a device according to the invention, the folding device includes a set of levers designed to rotate about at least one axis. This allows the thread folding movement to be carried out quickly and reliably.

In a second embodiment of a device according to the invention, the folding device comprises two tabs provided with two notches. Thus, a simplified construction is obtained.

In a third embodiment of a device according to the invention, the folding device is mounted on a first disc intended to be rotated. By forcing the disc to rotate, a machine capable of performing a high bandwidth is obtained.

In a fourth embodiment of a device according to the invention, each lever is provided with a clamping spring for capturing and maintaining the filament. In this way the proper alignment of the thread is achieved.

In a fifth embodiment of a device according to the invention, the mooring station includes at least one pair of hooks designed to grasp and separate said first and second base threads. The use of hooks is perfectly suited for gripping and spacing the main threads, as they are elements with a simple and reliable construction.

In a sixth embodiment, the device according to the invention comprises a second disc provided with a rim (edge) having at least one opening and a clamping element designed to support the suede thread at the height of the opening. The folding device is mounted on the inside of one perimeter of the second disk, which is rotated to bring the opening aperture to each side at the front of the folding device. This ensures a relatively good operating frequency with even a single folding device.

The invention is explained in more detail with the accompanying drawings, of which:

Figure 1 represents a Turkish knot or a Gördez knot with the main threads in the same plane;

Figure 2 - Turkish nodes or Giordez nodes, the main filaments being in two planes;

Figure 3 is a hay knot, with the main threads in the same plane;

Figure 4 is a schematic representation of a variant embodiment of the device according to the invention, wherein this device is provided with a first disk carrying several folding devices;

Figure 5 is a detail of a conical thread distributor;

Figure 6 illustrates the feeding of a suede thread using a tapered distributor;

Figure 7 is a detail of a station for fastening and of a second disc for lining;

Figure 8 is a partial sectional view of one rim of the second disc;

Figure 9 is a first embodiment of a folding device;

Figure 10 is a folding device of Figure 9 in a folded position;

Figure 11 is a second embodiment of a folding device;

12 and 13 are a third embodiment of a folding device;

14 and 15 show a fourth embodiment of a folding device;

Figures 16 to 25 illustrate the various steps of the binding method according to the invention;

Figures 26 and 27 - the placement of the wefts between the main wires.

In different figures, the same elements or similar elements have the same designation.

In the manufacture of knitted carpets, there are several ways of tying fibers, especially suede threads, around one or more major threads. These threads are of silk, wool, cotton, gold, silver or any other natural mineral or synthetic material, spun or monofilament. The Turkish knot or the Gördez knot explained in Figures 1 and 2 is often used to tie the threads. The main characteristic of the Gordez Node is that the thread is folded into closed loops around two adjacent main threads 1 and 2, located in the same plane (Figure 1) or in two different planes (Figure 2). In the Persian knot or Seine knot (Figure 3), the filament is folded into a closed loop around one main filament 1 and folded into an open loop about one second main filament 2. The first and second main filaments are either in the same plane, or in two different planes. The method according to the invention is applicable to both the tying of the Gordez nodes and the Seine nodes.

Figure 4 shows schematically and in perspective a device according to the invention. The apparatus includes a thread distributor 3 that operates in a manner comparable to the operation of a lever typewriter. Thread distributor 3 has a group of hollow tubes 4 which are spaced at the same distance along one conical surface defined by circles of radii R _A and R _B arranged in two orthogonal planes (a and b) orthogonal (a and b) from each other. Each tube 4 preferably has a slightly curved protruding end that allows for better positioning of the filament.

A certain colored thread passes through each tube 4. Each tube 4 is supported, on the one hand, by a toe-shaped hole 6 made in a support plate at right angles to the axis XX 'and, on the other, by a pivoting fork 7, mounted at the end of rod 8 on piston 9 or on electromagnet. The pistons or control solenoids 9 are positioned in the plane b perpendicular to the axis XX 'and are radially positioned at the point B at which the axis XX' intersects the plane b.

The control of a piston 9 or an electromagnet is performed manually, semi-automatically or automatically. Management can also be done with a program controlled by a computer.

The piston 9 or the corresponding solenoid is actuated to bring a single thread of a particular color along the XX 'axis. The radial motion of the fork 7 is designed such that at the end of the stroke the axis of the pipe 4 coincides with the axis XX '.

In the construction of Figures 5 and 6, the guide tube 4 is fixedly fixed to the end of the rod 8 of the piston 9. The other end of the guide tube 4 is, for example, connected to a plastic tube through which the colored thread is fed 5. The plastic tube is easy to trace the movement on the rod 8 of the piston 9, which is inclined relative to the axis XX ', the piston 9 is located on a conical surface with an axis of symmetry XX' and top B.

The colored thread 5 is projected in such a way into the guide tube that one end of the thread 5 extends from the free end of the guide tube 4 at a distance sufficient to be gripped by a gripper 11 when the guide tube 4 is in a lowered position axis XX '. The gripper is part of a folding device (Figure 4) and for example consists of two springs 12 and 13 mounted on the levers 14 and 15 mounted on a first disk 16 rotating about the vertical axis ZZ '. But the gripper can also be made up of a traditional two-arm clip that grips the colored wire 5 to guide it to the folding device.

Figure 7 shows another construction in which the folding device 17 is mounted over a second disk 18 and along the axis LL '. The second disk is provided with a rim 20 with at least one, but preferably several slots 19, as shown in Figure 8, which represents a partial section of that rim. The crown 20 extends upwards and at least partially covers the folding device 17, which is located on the inside of the perimeter, is not fixed to the second disk 18 and does not follow its rotational motion. On the one and the other side of the center of each slot 19, along the rim of the second disk 18, there are two gripping elements, for example composed of springs 12 and 13. Slots 19 allow each end of the folding device 17 to pass through, when any of the threads 5 is removed by rotating the second disk against a pair of major threads 1 and 2. The second disk 18, like the first disk 16, is mounted on an axis connected to an engine that drives the disks in rotation.

In order to cut the threads 21, especially suede threads, the device according to the invention includes a cutting device 22 (figure 7) located after the thread distributor 3. The cutting device 22 includes, for example, a cutting blade that rests against the contact point 23 after the thread was gripped by grapple 11. The contact point 23 itself is part of the disc 16 or 18. The use of this shear 22 allows the strands to be arranged one after the other in the same plane along the contour and the disk in such a way as to increase the binding speed. In the example of Figure 7, each time a thread 21 is cut, the disk 18 is driven and rotated at an angle β. During this rotation, the gripper 11 grips the selected thread 5 and holds it. After rotation of angle β, the cutting device 22 is driven and cut off by the thread 21, which is then supported by the gripping elements 12 and 13. In the example of Figure 4, after each rotation at an angle β of the first disk and cutting, the thread is retained by the springs 12 and 13, forming an integral part of each movable folding device. In another embodiment, the cutting device is comprised, for example, of a pair of scissors.

Figure 9 illustrates a first embodiment of the folding device according to the invention. This device includes gripping springs 12 and 13 mounted on the levers 14 and 15 described above. Preferably, the clamping springs 12 and 13 are inserted into the ends of the levers 14 and 15 in two notches designed for this purpose. For example, the spring 12 is in the winding direction to the left and the spring 13 is in the winding direction to the right. The levers 14 and 15, respectively, are connected by means of reels 24 and 25 respectively to the plate 26. The centers of rotation of these levers are arranged respectively in the axes 27 and 28. During one folding operation (Figure 10), the plate 26 moves forward in the direction of axis XX 'along axis ΥΥ'. The reels 24 and 25 then exert a force on the levers 14 and 15, which causes them to rotate about the axes 27 and 28 and around the main threads 1 and 2, in a U-shaped thread 21, supported by the springs 12 and 13, such as the ends of thread 21 will be approaching. During this folding operation, the levers 14 and 15 are displaced in order to extend the gripping springs 12 and 13 from the peripheral edge of the disk 16 and to be brought together to bring the ends of the thread 21 closer together. is controlled by a piston or an electromagnet not shown in the figure.

Using the second disc 18 (Figure 7), the front part of the folding device passes through the slot 19 and grips the thread 21, which is then folded. After this operation, this front portion returns to allow the disk 18 to rotate and to bring one another slot 19 and therefore another thread 21.

Figure 11 illustrates a second embodiment of a folding device according to the invention. In this case, the folding device includes two push tabs 31 and 32 driven by the bar 26 and two reels 29 and 30. The reels 29 and 30 are respectively connected to the tabs 31 and 32, each of which has a corresponding notch 33 , 34 with a U-shaped, V-shaped or a combination of both. The thread enters the recesses 33 and 34 parallel to the bar 26. During the folding operation, the bar 26 moves forward in the direction of the thread 21 and the portion of the thread that is between the recesses 33 and 34 is folded in a U-shape. in such a way that its ends join together. The notches 33 and 34 support the thread well and prevent it from twisting.

12 and 13 illustrate a third embodiment of a folding device, wherein the levers 35 and 36 rotate about the two rotation axes 37 and 38. Each of the levers 35 and 36 is shaped like a clamp. Brackets 35 and 36 push the thread to fold it in a U-shape.

Figures 14 and 15 illustrate a fourth embodiment of a folding device, wherein the levers are profiled in the form of humps 39 and

40. The rotation of these levers is provided by a fork 43 provided at the ends with two ball bearings 41 and 42, while their opening is ensured by tensioning springs coaxial to both axes of rotation.

There are different solutions for obtaining different lengths of threads 21. In one case, the first disk 16, respectively the second disk 18, is replaced by another disk of the same diameter but with different number of folding devices or windows, whereby the rotation angle β of the disk is also changed. In another case, the angle of rotation of the disc and the number of filaments trapped are kept constant, reducing the diameter of the replacement disc to produce shorter filaments or increasing to obtain longer filaments.

In order to bind the filament around the two main filaments, the fixture according to the invention has a displacement device designed to shift to the filament 21 one first filament 1 and a second filament 2 adjacent. In the construction of Figure 16, this displacement device is composed of a piston 44 designed to be displaced in the plane of the main threads 1 and 2. The piston head 44 pushes the two adjacent main threads 1 and 2 and moves them to the thread 21 to be tied up. On the other side of the main threads opposite to that in which the piston 44 is located (Figure 17) is a pair of hooks 45 and 46 mounted on motors 47 and 48, preferably electric motors or pneumatic motors in a state of oscillation. hooks designed to grasp and disengage the two main threads that the piston 44 pushes forward. Below hooks 45 and 46, and on the same side from which they are located relative to the main filament system, there is a tie clamp 49 mounted on a transport element (not shown in the drawing) intended to draw the tie clamp 49 between the main filaments hooked by the hooks 45 and 46, and to make it reciprocate with respect to hooks 45 and 46.

A suede thread 5 is selected for tying a Gordese knot according to the method of the invention by moving the piston 9 carrying the guide tube 4 with the selected colored thread 5. The piston 9 displaces the guide tube in such a way that the end 10 of the thread 5 that protrudes from the guide tube 4 to be gripped by the gripper 11 of the folding device. In the exemplary embodiment, in which the folding device 17 is located on a second disk 18, the disk is rotated at an angle β, which results in the withdrawal of one end 10 of the thread 5 beyond the guide tube 4. Then that end 10 of the thread 5 is caught by the clamping springs 12 and 13. When the disc is displaced after rotation at an angle β, its rotation is stopped and the cutting device 22 is moved to cut a thread 21 from the selected colored thread 5. In the example of the first disk 16, the thread 21 is engaged and the disk 16 is displaced by rotation, and n zitsionira slot 19 before folding device 17.

When a thread 21 is cut, it is brought before the main threads 1 and 2 around which it will be tied, which can be accomplished, for example by rotating the disk 16. The piston 44 is actuated when the thread 21 is located in front of the main threads 1 and 2 (Figures 16 and 17), on the side of the flickering hooks 45 and 46. The piston head 44 then pushes the selected main threads 1 and 2 and leads them to the thread 21 and to the flickering hooks 45 and 46, as is shown in Figure 18. Then the flickering hooks 45 and 46 rotate (Figure 19) against the two adjacent main threads 1 and 2 to be fastened as they move forward. The rotation of hooks 45 and 46 is triggered by two opposing torques created by motors 47 and 48. Each hook 45 and 46 is displaced from its original position by automatically separating the main threads 1 and 2 when they are on them. exerts tension with the help of hooks 45 and 46. Figure 20 illustrates one way of forward tensioning of hooks 45 and 46, the main threads 1 and 2 are spaced apart to allow the passage of the binding clamp 49 between the selected main threads 1 and 2. .

After the two main strands 1 and 2 have been displaced to the strand 21, this strand is essentially folded in a U-shape. As explained above, the bar 26 is pushed to the thread and the levers rotate about its axis accordingly. Thus, the thread 21 is arranged in a U-shape around the two main strands 1 and 2, as shown in Figure 10.

Figures 22 and 23 illustrate how the tying clamp 49 rises between the main threads 1 and 2 to secure the two ends of the U-folded thread 21. When the clamping clamp 49 catches the ends of the yarn, the hooks 45 and 46 return in their initial position and are spaced apart as shown in Figure 23 in such a way that they release the main filaments. Then the clamping clamp 49 lowers (Figure 24) and pulls down the already made but not yet tightened knot. Figure 24 also shows that when the hooks have released the main threads, the plunger head 44 also returns, thus completely freeing the main threads. The binding clamp 49 is at this point detached from the main threads 1 and 2 between which it is located and continues its downward movement. During this downward movement, the knot gradually tightens. When the tying clamp 49 reaches its longest position in its stroke, as shown in Figure 25, the assembly rests on the threads of the existing weft and tightens completely. Thus, the looping of one strand is completed and the gripper 49 will rise again to pick up another strand and resume tying.

In order to make a complete carpet, it is necessary and sufficient to act in this way, step by step, by displacing each time a predetermined distance of the piston 44, the clamping clamp 49, the hooks 45 and 46, as well as the accessory folding parallel to the plane of the basic filaments and this is done for each node.

A similar method is used for tying a Seine knot, but the suede thread is folded into a closed loop around the first main thread and into an open loop around the second main thread.

Figures 26 and 27 show the first and second exemplary embodiment of the weft laying. Usually there are one, two and even three wefts between the two rows of nodes. Handing these wefts is done individually and never at once. In any case, at least one of the wefts has a length that exceeds significantly the width of the carpet, but this manual operation is slow. In the process according to the invention, the wefts are passed in a wavy motion so as to obtain a length of weft exceeding the width of the carpet. In the example of Figures 26 and 27, the weft 50, respectively 51, is zigzagged or sinusoidal. The inclination of the weft threads makes it easier to spend the weft.

Claims (21)

Claims 1. A method for the manufacture of knitted flora carpets in which the threads, especially the suede threads, are cut and tied around at least one basic thread, each thread being tied to one area of the main threads in which the binding is made, and then fastened by means of a binding clamp around at least one first main filament from the main filament area, characterized in that, before the suede thread (21) is connected, the first main filament (1) and adjacent second main thread (2) is shifted to the elongated thread (21) is then separated from one another, after which the suede filament (21) is folded around the first (1) and second (2) main filaments, the binding gripper (49) extends between them, and grips the edges of the suede thread (21) and the main threads (1 and 2) return to their original position, while the binding gripper (49) moves and ties the thread (21) applying tension to it, and takes it to the nearest weft thread . Method according to claim 1, characterized in that, when tying the Gordez knot, the suede thread (21) is tied in closed loops around the first (1) and second (2) main thread of the binding clamp (49). Method according to claim 2, characterized in that the filament (21) is essentially folded in a U-shape around the main filaments (1 and 2) before being gripped by the binding clamp (49). Method according to claim 1, characterized in that, when the Seine is knotted, the thread (21) is folded in a closed loop around the first main thread (1) and in an open loop around the second main thread (2) by means of the binding clamp (49). A method according to claims 1 to 4, wherein at least one weft (50) is threaded between the main filaments zigzag. A method according to any one of claims 1 to 4, wherein at least one weft (51) is passed between the main strands along the sine wave. Method according to one of Claims 1 to 6, characterized in that the suede thread (21) is withdrawn and cut at the height of the first (1) and second (2) main threads. 8. A device for producing carpets with tied flora, including a thread distributor before a thread cutting device, in particular suede threads, and a tying station associated with the cutting device, as well as a binding gripper for gripping the ends of the suede thread and tying it around at least one first main thread and / or at least folding the thread around one second main thread, the knitting station having a suction device for folding the suede thread, characterized in that and a moving device (44) of at least one first main thread (1) and at least one second main thread adjacent thereto (2) to the suede thread (21), the folding device (17) providing folding of the suede thread (21) about the first (1) and second (2) main filament, and the clamp (49) is disposed on the suede thread (21) and placed on a transport element leading it between the first (1) and second (2) main filament . Device according to claim 8, characterized in that the folding device includes a set of levers (14 and 15) designed to rotate about at least one axis. Device according to claim 8, characterized in that the folding device includes two tabs (31 and 32) provided with two notches. A device according to claim 8, characterized in that the folding device includes two cam (39 and 40), each cam being rotatable about one axis. Device according to one of Claims 8 to 11, characterized in that the folding device is mounted on a first rotatable disc (16). A device according to claim 12, characterized in that said first disk (16) carries at least two folding devices (11) arranged on the same side of the disk (16) and in the same plane. A device according to claim 9, characterized in that each lever (14 and 15) is provided with a clamping spring (12 and 13), which catches and supports the thread (21). Device according to one of Claims 8 to 14, characterized in that the thread distributor (3) has a predetermined number of pistons (9), each piston (9) being provided with a rod (8) connected to a guide tube (8). 4) designed to guide a single thread (5). Device according to claim 11, characterized in that the cutting device (22) has a cutting blade located along the peripheral edge of said first disc (16). Device according to one of Claims 8 to 16, characterized in that the displacement device has a piston (44) with a face pressing at least one main thread (1), which piston (44) is disposed on the side of the main threads opposite to the folding device. Device according to one of Claims 8 to 17, characterized in that the tying station has at least one pair of hooks (45 and 46) for gripping and spacing the first (1) and second (2) main threads. A device according to claim 8, characterized in that it comprises a second disc (18) provided with a crown (20), with at least one slot (19) and one clamping element (12 and 13) for maintaining the suede thread ( 21) at the slot height, the folding device (17) being mounted on the inside of the perimeter of the second disk (18), which is intended to rotate each slot (19) at the height of one end of the device for folding (17). 20. Folding device for a device according to claim 8, characterized in that it essentially folds in a U-shaped thread (21) about the first (1) and second (2) main filaments. A disk for a device according to claim 12, 13 or 19, characterized in that it is rotatable.