ES2749087T3 - Knotting and creel device - Google Patents

Abstract

Knotting device (13) with a mandrel (17) which is hollow and has a suction opening (18) which is connected to a suction device (20), with a first guide path for one end of a first bundle of threads (16) and with a second guide path (21) for the beginning of a second bundle of threads (22), wherein the second guide path extends around the mandrel (17), characterized in that the first guide path The guide is arranged in front of the suction opening (18) and the mandrel (17) is displaceable with respect to the first guide path, where the mandrel (17) is displaceable with respect to a stripping device (27) and a coupling device is arranged adjacent to the mandrel (17) to slide the loop (26) formed by the second bundle of threads (22) over the first bundle of threads (16) in the direction of the longitudinal extension of the first bundle of threads (16) in the sector of a square knot that is formed accordingly.

Description

DESCRIPTION

Knotting and creel device

The invention relates to a knotting device for a bundle of threads according to the preamble of claim 1.

Furthermore, the invention relates to a creel with at least one warp folder support and a creel exit, in which such a knotting device is arranged.

DE 2439361 B1 shows a corresponding knotting device with a mandrel that is hollow and has a suction opening that communicates with a suction device. The threads to be tied are gathered and wrapped together around the perimeter of the mandrel. Thereafter, a loose end of the threads is drawn into the mandrel and the threads come off the mandrel, so that a knot is formed.

JP S31 1629 B1 discloses a square knotting device.

The invention will be described below by means of an assembly device, however without being limited thereto.

In an assembly device, the sets of yarns, which slide from several sectional warp crimpers, combine to form a warp bundle. If necessary, the bundles of yarns or the bundled bundles of yarns, wound on the warp folder, can still undergo further treatment, for example a glue can be applied. If the supplied sets of yarns need to be changed, for example because one or more sectional warp crimpers have become empty or because a warp crimper must be produced by other yarns, it is common to connect the end of the bundles of wound yarns to the start of the newly fed yarn sets, so that the newly fed yarn sets can be guided in the same way through the device as the yarn sets wound up to now.

For this purpose, it is generally proceeded by forming a plurality of first sets of yarns from the end of the group of yarns wound on the warp folder and forming a plurality of second bundles of yarns from the beginning of the new batch of fed yarns. Thereafter, each first bundle of threads is knotted with a second bundle of threads. However, knot tying is relatively tedious and tiring for an operator.

The invention has for its object to simplify the work of an operator at the exit of a creel.

In a knotting device, the objective is achieved by the features of claim 1.

In such a knotting device it is merely necessary to arrange both yarn bundles according to the guide paths. In the first tour guide, this is relatively easy, because the fiber bundle should only be placed in front of the suction opening. For example, if the first bundle of wires hangs down in the direction of gravity, in many cases it is automatically positioned correctly. The second bundle of threads simply has to be placed around the mandrel and thereby forms a loop or the like. The suction opening can suck by means of the suction device. If it is sucked through the suction opening, that is, in this case a negative pressure is generated, then the first bundle of threads is sucked through the suction opening and, therefore, passes through the mesh or loop that forms the second bundle of threads on the second path guide. The mandrel, which is movable relative to the first path guide, can be displaced so that the first bundle of yarns engages with the mesh or loop of the second bundle of yarns. So to connect the two bundles of wires, the loop just needs to be tightened firmly enough.

The mandrel is movable relative to a release device. When the mandrel is displaced, the detaching device can detach the second wire bundle from the mandrel so that the loop formed by the second wire bundle can slide over the first wire bundle, so that the two wire bundles engage each other reliably.

Adjacent to the mandrel is a coupling device. The coupling device can be used to push on the first thread bundle the loop formed by the second thread bundle, in fact in the direction of the longitudinal extension of the first thread bundle in the forming knot sector, so that produces a square knot.

Preferably, the second travel guide passes through a slide that is movable along a part of the second travel guide. With the help of said slide, which forms a part of the coupling device, the knot can, as it were, be tightened. In a particularly preferred embodiment, the end of the second wire bundle is folded once so that it is returned on a path parallel to the rest of the second wire bundle. This double beam path is passed once through the U-shaped end of the double beam segment and therefore forms a loop. This tie is provided in the second tour guide. Then, when the loop has been pushed onto the first bundle of threads, the slider can push the tip of the "U" over the loop, thereby creating a square knot. Such a square knot connects the two bundles of thread with sufficient force, so that with such a knot, the second bundle of yarns can be passed through a subsequent processing machine with the help of the first bundle of yarns.

In a further alternative, the coupling device may also have a holding bar, around which the second travel guide runs and which is movable with respect to the first travel guide. This retention bar is used to hold the loop formed by the second wire bundle when the second wire bundle is slid off the mandrel. The retention bar can then be guided in a direction from which the first bundle of yarns tapers and thus pushes the loop formed by the second bundle of yarns onto the first bundle of yarns. Even with this it is possible to obtain a square knot reliably.

The invention also relates to a creel with such a knotting device at the creel outlet.

In such a creel, the operator must bring only the bundles of yarns from the group of yarns that run to the coil to the correct position in front of the suction openings and previously arrange the bundles of yarns from the group of yarns that runs to the coil on the second travel guide. This activity is relatively simple and physically not strenuous. Thereafter, the knotting device need only be put into operation by the fact that the suction device sucks, and then, when the first bundle of threads has entered each of the suction openings, the mandrel is moved with in relation to the first tour guide. The corresponding knots are then formed in all pairs of first and second bundles of threads. This process is also relatively quick, so not much time is wasted for change.

Preferably, between the warp folder support and the knotting device, a guide of groups of yarns is provided and a device that generates yarn bundles is provided, which is movable, at least in part, with respect to the groups of threads. With the wire bundle generating device the activity is further simplified. The yarn bundle generating device produces from the group of yarns running to the coil a number of yarn bundles, where the number of yarn bundles suitably corresponds to the number of available knotting devices. Since the wire bundle generating device is mobile, at least in part, with respect to the wire group guide, it can penetrate the wire group guide and there group the wires into wire bundles.

In this case, it is preferred that the wire bundle generating device has a support in which a plurality of projections are provided projecting from the support in the direction of the group of wires, where each clip is assigned a clamp. The protrusions can then enter the thread group and subdivide the thread group in the width direction into as many sections as there are knot directions present. The clamp then pulls these sections together to form a bundle of threads.

It is preferable that the projections have a point and are movable within the group of threads. The tip facilitates the introduction of the projections in the group of threads. The risk of the threads in the thread group being damaged is relatively low.

Preferably, behind the knotting device, a second yarn bundle generating device is arranged in one direction from the warp bending support to the knotting device. The second wire bundle generating device can be configured in the same way as the first wire bundle generating device described above. By means of the second yarn bundle generating device, a corresponding number of yarn bundles can be generated from the yarn bundle in process which are then arranged in the first path guide.

Preferably, each space between a protrusion and a clamp is assigned a knotting device. This simply ensures a match between the number of knotting devices and the number of resulting thread bundles.

Preferably, the clamp and a protrusion that is adjacent to the protrusion assigned to the clamp can be brought to coincide. This ensures that the clamp does not interfere with the separation of the strands into individual groups, from which the bundles of strands are later formed. Rather it disappears on or behind the ledge.

In this case, it is preferred that the clamp and protrusion each form a plurality of layers, where gaps are formed between the layers and the plier layers enter spaces of the protrusion.

In the following, the invention is described by means of a preferable embodiment shown in combination with the drawing. At this point it is shown in

FIG. 1 shows a knotting device with a first bundle of threads;

FIG. 2 shows a knotting device with a first aspirated bundle of threads;

FIG. 3 shows the knotting device with the first and second bundle of threads;

figure 4 a perspective representation of the view in figure 3;

Figure 5, a finished knot;

FIG. 6 shows a wire bundle generating device;

figure 7, a detail VI of figure 6;

FIG. 8 shows the yarn bundle generating device in operation and

FIG. 9 shows a highly schematic representation of a creel.

Reference is first made to the highly schematic representation of a creel 1, as shown in Figure 9.

The creel 1 has two warp beam supports 2, 3, where a warp sectional folder 4, 5 is arranged on each warp beam support 2, 3. A group slides from each sectional warp beam 4, 5 Partial yarns 6, 7. Partial groups of yarns 6, 7 are driven onto bypass rollers 8, 9 and gathered behind the last bypass roller 9 to form a group of wires 10. This group of wires 10 then feeds a device assembly device (or other processing device) in the direction of an arrow 11. The assembly device may also be preceded by a device for introducing a glue.

Of course, more than the two warp sectional beams 2, 3 shown can be provided, so that more than two sectional warp beams 4, 5 can also be lifted into the creel 1.

If a change of warp sectional beams 4, 5 is required because, for example, the warp sectional beams 4, 5 have become empty or another group of threads 10 must be further processed, proceed as follows, where for a For easier differentiation, the old wire group, that is, the wire group that runs to the bobbin, is designated with "A" and the new wire group, or the in-process wire group, with "B".

The group of threads B running to the bobbin slides from the (new) warp sectional crimpers 4, 5 and is pulled up behind a knotting device 13, shown in Fig. 9 only schematically, and will be explained in more detail by means of Figures 1a 5. A first wire bundle generating device 14 generates a series of wire bundles from the group of wires B which runs to the coil. These bundles of threads are then cut in front of the pulling device 12, that is, between the pulling device 12 and the knotting device 13 and, as described below, are fed into the knotting device 13.

A second wire bundle generating device 15 is provided for the wire group A in process. The second wire bundle generating device 15 also generates a series of wire bundles, where the number of wire bundles of the wire group A in process and the number of wire bundles of the group of wires B running towards the coil are the same size. Conveniently, the group of threads in process A and the group of threads running to the coil B still overlap. To simplify the following description, the wire bundles of wire group A in process are called "first wire bundle" and the wire bundles of wire group running to coil B as "second wire bundle".

As shown in Figures 1 to 5, the knotting device 13 for each first fiber bundle 16 in a mandrel 17, which is hollow and has a suction opening 18. In this way, the suction opening can be formed by a V-shaped notch 19 on the front face of the mandrel 17, where the base of the "V" is aligned parallel to the first wire bundle 16. In the present preferred embodiment, the first wire bundle 16 extends into the direction of gravity, therefore vertically. Accordingly, the base of the V-shaped notch 19 is also aligned in the direction of gravity.

The suction opening 18 communicates with a suction device 20, so that the suction opening can be subjected to negative pressure. Due to this negative pressure, the first fiber bundle is drawn into the mandrel 17, as shown in Figure 2.

The first fiber bundle 16 is located in a first path guide, shown in Figure 1. This path guide extends in front of the suction opening 18. The circumference of the mandrel forms a second path guide 21. The second bundle of threads 22 is now arranged on the second path guide 21, that is, it is placed around the circumference of the mandrel 17 to form a loop. This is not shown in Figures 1 and 2 for reasons of clarity. However, the way in which the second bundle of threads 22 is arranged in the second path guide 21 results from Figures 3 and 4.

In a particularly advantageous embodiment, the second wire bundle 22 is handled as follows: one end 23 of the second wire bundle 22 is redirected by 180 ° and, so to speak, is guided parallel to the second wire bundle 22 which runs to the coil. Therefore, a section 24 of the wire bundle 22 and the end 23 of the second wire bundle 22 are parallel to each other and form a kind of "U" that opens downwards. Then a base 25 of the U is returned above the end 23 and the section 24, so that a loop 26 is formed that can be pushed onto the mandrel 17. This is a relatively simple operation. As stated above, the second Fiber bundle 22 is guided first through second path guide 21 and then first fiber bundle 16 is guided through first path guide. Once the first bundle of fibers 16 has been drawn into the mandrel, the mandrel 17 can move relative to the second bundle of yarns 22. A release device 27 is appropriately provided so that loop 26 can be detach from mandrel 17. The first bundle of threads 16 then passes through loop 26.

The mandrel can then be moved further away from the first path guide and thus from the first bundle of threads 16, so that the first bundle of threads 16 is completely released from the mandrel 17.

The second bundle of threads 22 is guided with its section 24 and its end 23 through a slider 28 that is movable parallel to the second bundle of threads 22. The slider has two pins 29, 30. When the slider 28 moves upwards On the second bundle of threads 22, the two pins 29, 30 push the base 25 of the U, that is, a part of the loop 26 above the loop 26, so that a square knot 31 shown in the figure is shown. 5, which reliably connects the first wire bundle 16 and the second wire bundle 22 to each other.

Instead of a coupling device featuring the slide 28, another embodiment of a coupling device may also be used in a manner not shown. For this purpose, a retention bar is arranged that has two sections extended more or less parallel to the mandrel 17 and that are connected by an angled section. At the beginning of a knotting process there is a section parallel to the mandrel side. The second travel guide extends on the outside around the retention bar in such a way that the retention bar is surrounded by the second bundle of threads 22, that is to say the base 25 of the U is located on the outside on the bar and the two sections adjacent to the base 25 are arranged on both sides of the retention bar, that is, a section between the mandrel 17 and an outer section.

The mandrel 17 is then retracted together with the retaining bar, so that the base 25 rises up the angled section and reaches the other parallel section of the retaining bar. Thereafter, at least the retaining bar is moved in the direction from which the first bundle of threads 16 comes, so that the base 25 of the U is pulled in the direction of the first bundle of threads 16 and, therefore, a cross knot is formed.

To produce the yarn bundles, as already explained above, yarn bundle generating devices 14, 15 are provided. The first yarn bundle generating device 14 will be explained in more detail by Figures 6 to 8. The second device wire bundle generator 15 is designed in the same way.

The filament generating device 14 has a support 32 that extends transversely with respect to the group of threads 10 and is oriented essentially horizontally. The wire group 10 is arranged in a wire group guide.

A large number of projections 33 are arranged on the support 32. In a top view, the projections 33 are approximately triangular and have a tip 34, where the tip 34 is oriented towards the group of threads 10. In addition, the projections 33 have a break 35.

Each projection 33 is assigned a clamp 36 which is movable parallel to the longitudinal extension of the support 32. A drive 37 is provided to move the clamp 36.

As can be seen in particular in figure 8, each projection 33 is constructed of a plurality of layers 38, where spaces 39 have been lined between the layers.

The clamp 36 also has a plurality of layers 40, between which spaces 41 are arranged. The layers 40 of the clamp 36 can enter the spaces 39 of the projection 33 and the layers 38 of the projection 33 can enter the spaces 41 of the gripper. Consequently, it is possible to make the projections and the clamps coincide with each other, as shown in figure 8. The support 32 is movable in the direction of an arrow 42 towards the group of threads 10, specifically in such a way that the projections 33 penetrate the group of threads 10 and form there several groups 43 of threads. Thereafter, when the clamps 36 are moved, the threads of a group 43 are gathered into one bundle and are received in the recess 35. The bundles of threads formed in this way can be individually cut and placed around the mandrel 17 by the procedure described in relationship with Figures 1 to 5.

Claims (12)

1. Knotting device (13) with a mandrel (17) that is hollow and has a suction opening (18) that is connected to a suction device (20), with a first guide path for one end of a first wire bundle (16) and with a second guide path (21) for the start of a second wire bundle (22), where the second guide path extends around the mandrel (17), characterized in that the first guide path is arranged in front of the suction opening (18) and the mandrel (17) is movable with respect to the first guide path, where the mandrel (17) is movable with respect to a release device (27) and a device for The coupling is arranged adjacent the mandrel (17) to slide the loop (26) formed by the second bundle of threads (22) above the first bundle of threads (16) in the direction of the longitudinal extension of the first bundle of threads (16) in the sector of a square knot that is formed accordingly Inc. 2. Knotting device according to claim 1, characterized in that the second guide path (21) passes through a slide (28), which forms a part of the coupling device (27), which is movable along a part of the second guide path (21). Knotting device according to claim 1, characterized in that the coupling device has a retention bar, around which the second guide path runs and which is mobile with respect to the first guide path. 4. Creel (1) with at least one warp folder support (2, 3) and a creel outlet in which at least one knotting device (13) is arranged according to one of claims 1 to 3. 5. Creel according to claim 4, characterized in that between the warp folder support (2, 3) and the knotting device (13) a guide of groups of threads is provided and a beam generating device is provided of yarns (14) which is mobile, at least in part, with respect to the guide of groups of yarns. 6. Creel according to claim 5, characterized in that the thread bundle generating device (14) has a support (32) in which a plurality of projections (32) are arranged, projecting from the support (33) in the direction of the group of wires, where each protrusion (33) is assigned a clamp (36). 7. Creel according to claim 6, characterized in that the projections (33) have a point (24) and are movable inwards of the guide of groups of threads. Creel according to one of Claims 4 to 7, characterized in that in one direction from the warp bending bracket (2, 3) to the knotting device (13) it is arranged behind the knotting device (13) a second yarn bundle generating device (15). 9. Fillet according to one of claims 6 to 8, characterized in that each space is assigned a knotting device (13) between a projection (33) and a clamp (36). Fillet according to one of claims 6 to 9, characterized in that the clamp (36) and a projection (33) that is adjacent to the projection (33) assigned to the clamp (36) can be matched. 11. Fillet according to claim 10, characterized in that the clamp (36) and the projection (33) are each formed of a plurality of layers (38, 40), where spaces (39, 41) are formed between the layers (38, 40) and the layers (40) of the clamp (36) enter spaces (39) of the projection (33). 12. Fillet according to claims 6 to 11, characterized in that the projection (33) has a recess (35).