Yarn laying device for textile machine, textile machine and method for operating textile machine

Abstract

The invention relates to a yarn laying device for a textile machine, in particular a spinning machine or a winding machine. The yarn laying device comprises a laying element and a driving device of the laying element, wherein the laying element is designed to enable the yarn to be wound to periodically move above a bobbin. The invention also relates to a textile machine, in particular a spinning machine or a winding machine, having a yarn laying device comprising a laying element and a drive device for the laying element, the laying element being designed to periodically move a yarn to be wound over a bobbin; the invention also relates to a method for operating a textile machine, in particular a spinning machine or a winding machine, in which a yarn to be wound is periodically moved over a bobbin by a laying element of a yarn laying device, the periodic movement of the laying element having two reversal points at which the laying element reverses its direction of movement. According to the yarn laying device, the driving device is provided with at least one first crank driver with a first crank.

Description

Technical Field

[0001] The present invention relates to a yarn laying device for a textile machine, in particular a spinning machine or a winding machine, comprising a laying element designed to periodically move a yarn to be wound over a bobbin, and a drive for the laying element. The present invention also relates to a textile machine, in particular a spinning machine or a winding machine, comprising a yarn laying device comprising a laying element and a drive for the laying element, wherein the laying element is designed to periodically move the yarn to be wound over a bobbin, and to a method for operating a textile machine, in particular a spinning machine or a winding machine, wherein the yarn to be wound is periodically moved over a bobbin by a laying element of the yarn laying device, wherein the periodic movement of the laying element has two reversal points at which the laying element reverses the direction of its movement. Background Art

[0002] When producing yarn or winding yarn in a spinning machine or a winding machine, it is recommended to wind the yarn onto a so-called cross-wound bobbin for further processing of the yarn. Some spinning machines (such as, rotor spinning machines) can be designed to wind the yarn spun from the fibers directly onto the cross-wound bobbin. For example, in a ring spinning machine, the produced yarn is first wound onto a smaller spinning tube and then rewound onto the cross-wound bobbin in the winding machine. As the name suggests, the yarns in the cross-wound bobbin are crossed during winding, thereby forming a stable yarn package that can be easily transported and further processed. In order to produce cross-wound bobbins on a textile machine, particularly a spinning machine or a winding machine, a yarn laying device is needed, which moves the yarn to be wound in a periodic manner above the bobbin. Known yarn laying devices are, for example, designed as slotted rollers or, for example, are designed as reciprocating yarn guides. In the latter type of yarn laying device, the yarn guide is moved back and forth periodically in front of the bobbin, wherein the yarn guide must first be braked at the reversal point and then accelerated again. Such yarn laying devices are disclosed, for example, in DE 10 2013 016 644 A1 and DE 10 2004 025 519 A1. A disadvantage of these yarn laying devices is that braking and then accelerating the yarn guide at the reversal point is inefficient because it consumes additional energy. Summary of the Invention

[0003] The object of the present invention is therefore to provide a yarn laying device which overcomes the disadvantages of the known yarn laying devices and in particular has an improved energy efficiency.

[0004] This object is achieved by a yarn laying device, a textile machine, and a method for operating a textile machine having the features of the independent claims.

[0005] A yarn laying device for a textile machine, in particular a spinning machine or a winding machine, is proposed, comprising: a laying element designed to periodically move the yarn to be wound over a bobbin; and a drive device for the laying element. According to the invention, the yarn laying device is characterized in that the drive device has at least one first crank drive with a first crank. The first crank drive is capable of converting the rotation of the first crank into a periodic movement of the laying element. The movement of the laying element can, for example, take place along a straight line or a curve. A significant advantage over known yarn laying devices is that the reversal of the laying element at the desired reversal point is caused by the mechanical structure of the crank drive, so that the laying element does not need to be braked at the reversal point by a drive and then accelerated again. For example, the drive of the first crank can continue to operate at a substantially constant rotational speed.

[0006] For example, the first crank can be designed essentially as a disk, wherein the force transmission element is arranged away from the axis of rotation of the disk. Alternatively, the crank can also have a protrusion, on which the force transmission element is arranged. For example, the force transmission element can transmit at least some part of the rotation of the crank to the laying element via a pivot joint and a lever. Herein, the entire crank and lever are referred to as a crank drive. For example, some parts of the laying element can also act as a lever. The force transmission element can, for example, be designed as a pin arranged vertically on the plane of the crank.

[0007] In the simplest embodiment, the force transmission element of the crank can be directly connected to the laying element, for example via a slotted guide. In this embodiment, the laying element is mounted, for example, in a pivot bearing that defines the axis of rotation of the periodic motion on a circular arc segment. In order to achieve sufficient deflection between the reversal points of the motion, the laying element must be relatively long.

[0008] Therefore, in this context, it is advantageous if the first crank drive includes a first connecting rod that establishes a connection between the first crank and the laying element. This allows the deflection of the cyclical motion of the laying element to be increased without having to extend the laying element. In this case, a connecting rod is understood to mean a rod having a pivot bearing or at least a receptacle for receiving a pivot bearing arranged at the end of the rod. The first end of the connecting rod can be connected to the force transmission element of the first crank via a first pivot bearing. The second end of the connecting rod can be connected to the laying element via a second pivot bearing. Due to the corresponding installation of the two pivot bearings and the laying element, only a certain portion of the rotational motion of the first crank is transmitted to the laying element. In this way, the desired cyclical motion of the laying element is generated. The change in the direction of motion at the reversal point is automatically caused by the rotational motion of the first crank. The first crank can particularly be arranged to be away from the laying element in order to save space.

[0009] Since only a portion of the rotational motion of the crank is converted into the periodic motion of the laying element in this arrangement, the motion of the laying element slows down in the region of the reversal point. In this region, the force transmission element of the crank moves substantially perpendicular to the direction of motion of the laying element.

[0010] In this context, it is advantageous if the drive device has a second crank drive with a second crank. The second crank drive with the second crank can in particular be arranged so that the slowing down of the laying element in the area of ​​the reversal point is reduced or compensated. Through the interaction of the first crank drive with the second crank drive, a high laying speed of the yarn laying device and therefore a high winding speed of the yarn to be wound can be achieved. In addition, the length of the periodic movement between the reversal points can be increased by the second crank drive. The second crank can, for example, be identical in design to the first crank. When the yarn laying device is used as intended, the first crank and the second crank are operated in particular with an offset of 180°. This means, for example, that the force transmission elements of the first crank and the second crank are always arranged precisely opposite each other with respect to their rotational axes.

[0011] Advantageously, the second crank drive comprises a second connecting rod, which establishes a connection between the second crank and the laying element. The second connecting rod can be similar or identical in design to the first connecting rod. For example, only a certain portion of the rotational movement of the second crank is transmitted to the laying element via two pivot bearings at the ends of the second connecting rod. The pivot bearings of the second connecting rod can, for example, form the axis of rotation for the movement along a circular arc segment caused by the first crank drive.

[0012] It is also advantageous that the laying element has a first end with a yarn guide and a second end opposite the first end, wherein the first connecting rod is connected to the second end, and wherein the second connecting rod is connected to the area between the first and second ends, in particular to the axis of rotation of the laying element. This arrangement makes it possible to avoid slowing down the movement of the laying element at the reversal point. The shape of the movement and the length of the deflection between the reversal points can also be adjusted very flexibly, in particular by adjusting the shape of the guiding member of the laying element. By connecting the first connecting rod to one end of the laying element, the entire length of the laying element can be used as a lever for periodic movement. For example, the width of the laying element can be greater in the area connected to the second connecting rod than at the second end. This improves the stability of the laying element. The distance between the second end of the laying element and the connection of the second connecting rod to the laying element depends on how long the periodic movement between the reversal points should be and what shape the movement of the yarn guide should have.

[0013] In an advantageous further development, the yarn-laying device comprises a guide for the laying element. The guide can be used to define the shape of the movement of the laying element. In the simplest embodiment of the yarn-laying device, which in particular has only one crank drive, the guide can be designed as a simple pivot joint. In embodiments of the yarn-laying device with two crank drives, the guide of the laying element must additionally allow at least one thrust movement, in particular a translational movement, of the laying element.

[0014] Advantageously, the guides are designed as linear guides, trough guides, roller guides, and / or rocker supports. These guides allow for precise and stable adjustment of the movement of the laying element. Linear guides are guides that limit possible movement to that along a straight line. If the conditions are met, the trough guides and roller guides can of course be linear guides. Alternatively, the trough guides and roller guides can also provide guidance along a curve. By designing the guides differently, the desired placement of the yarn when winding the cross-wound bobbins can be determined very accurately. Trough guides typically include a groove in the guide element, for example, in which a guide pin engages. The shape of the possible movement is thus limited by the shape of the groove. The friction of the guide pin on the walls of the groove creates a certain resistance in the guide. In roller guides, at least two rollers typically engage around the guide element. The shape of the guide element, in turn, limits the shape of the possible movement. Compared to trough guides, the rolling action can result in less resistance.

[0015] For example, a guide in the form of a rocker support is designed similarly to the connecting rod described above. For example, one pivot bearing of the rocker support is connected to the laying element, while the other pivot bearing of the rocker support is fixed. A guide in the form of a rocker support can only provide radial curvilinear guidance and, therefore, unlike the other guides described above, cannot form a linear guide.

[0016] Alternatively, the guide member may be designed as a leaf spring, in particular a leaf spring without a bearing. In this case, the leaf spring supports the acceleration and deceleration of the laying element and improves the smoothness of the system.

[0017] It is also advantageous if the drive device includes a first drive, or the first drive and a second drive. If the yarn laying device only includes a first crank drive with a first crank, the first drive is sufficient to drive the first crank to perform the desired rotational motion. If the yarn laying device includes a first crank drive with a first crank and a second crank drive with a second crank, the first drive can, for example, drive the first crank and the second crank to move together. Without an additional gear mechanism, the first crank and the second crank will rotate at the same speed. Alternatively, it is also conceivable that the first crank and the second crank each have their own drive. In this case, the first drive drives the first crank, and the second drive drives the second crank. This makes it possible to achieve special movement modes of the laying element that would not be possible if the laying element shared the same drive. In particular, the rotational speed of each crank can be individually varied depending on the position of the laying element.

[0018] It is also conceivable to operate the first and / or second drive in a reciprocating manner, i.e., to periodically change the direction of the rotational movement. One of the drives can be rotated continuously, while the other can be operated in a reciprocating manner. The rocker support can also be equipped with a drive and possibly a crank, wherein the drive of the rocker support is preferably operated in a reciprocating manner.

[0019] A textile machine according to the invention, which is particularly designed as a spinning machine or winding machine, comprises a yarn laying device comprising a laying element and a drive for the laying element. As described above, the laying element is designed to periodically move the yarn to be wound over a bobbin. The textile machine is characterized in that the drive has at least one first crank drive with a first crank. As described above, a yarn laying device with the first crank drive improves the efficiency of the textile machine because, in contrast to known yarn laying devices, the laying element does not have to be braked by the drive at the reversal point of the periodic movement and then accelerated again.

[0020] The yarn laying device of the textile machine can in particular be designed as described above, wherein the described features can be implemented individually or in any desired combination.

[0021] It is particularly advantageous for the textile machine if the drive of the yarn laying device comprises a second crank drive with a second crank. As already described, the interaction of the first crank drive and the second crank drive enables particularly high laying speeds of the yarn laying device and, therefore, high winding speeds on the textile machine. This increased efficiency of the yarn laying device according to the invention thus directly leads to an increased efficiency of the textile machine according to the invention.

[0022] Further advantages of the textile machine are achieved if the drive device comprises a first drive, or the first drive and a second drive. The first drive is capable of driving the first crank. The first drive is also capable of driving the first crank and the second crank together. Alternatively, it is conceivable that the first drive drives the first crank and the second drive drives the second crank. The second drive results in higher costs in the manufacture of the textile machine, but it allows for a more refined adjustment of the movement pattern of the laying element of the yarn laying device, which can have a beneficial effect on the structure of the cross-wound bobbins produced. By controlling the path of the drive or adjusting the path of the drive, a special laying pattern of the yarn on the bobbin is possible.

[0023] It is also advantageous if the first and / or second drive is independent of the bobbin drive. In known textile machines, the bobbin and the yarn-laying device sometimes have a common drive, which can reduce the manufacturing costs of the textile machine. In the present case, however, it is advantageous if these drives are independent of one another, i.e., the bobbin and the yarn-laying device each have their own drive. This makes it much easier to adjust the movement of the laying element of the yarn-laying device or to adapt it to the desired properties of the cross-wound bobbin.

[0024] According to the invention, a method for operating a textile machine, in particular a spinning machine or a winding machine, in which the yarn to be wound is moved cyclically over a bobbin by a laying element of a yarn laying device, wherein the cyclical movement of the laying element has two reversal points at which the laying element reverses the direction of its movement, is characterized in that the movement of the laying element, in particular the reversal of the direction of the movement of the laying element at the reversal points, is caused by the interaction of at least one first crank with the laying element. As described in detail above, the reversal of the direction of the movement of the laying element occurs purely mechanically. The laying element does not have to be braked by a drive and then accelerated again in the opposite direction.

[0025] Advantages are achieved if the movement of the laying element (particularly the reversal of the direction of movement of the laying element at the reversal point) is caused by the interaction of the first and second cranks with the laying element. The second crank can, for example, accelerate the movement of the laying element in the region of the reversal point, thereby enabling high laying speeds and, consequently, high winding speeds of the yarn to be wound onto the cross-wound bobbin. Furthermore, the short reversal point formed during yarn laying reduces the yarn density at the bobbin edge, which results in a favorable bobbin density distribution. The reversal speed can be increased by increasing the crank rotational speed at the reversal point.

[0026] The offset between the first crank and the second crank affects the laying width of the laying element. The absence of any offset between the cranks (i.e., an offset of 0°) results in the smallest laying width. The force transmission elements of the cranks are in the same position relative to the corresponding rotation axis. The presence of an offset of 180° between the cranks results in the largest laying width. With an offset of 180°, the force transmission elements of the cranks are located at precisely opposite positions relative to the rotation axis of the cranks. Preferably, the laying width changes during bobbin accumulation in order, for example, to distribute the yarn at the bobbin edge and reduce the yarn density there. This can be achieved, for example, by changing the offset between the cranks during the winding process. The change in laying width over time is also referred to as swing stroke.

[0027] It is also advantageous that the rotational speed of the first crank and / or the second crank is varied, in particular increased, when the laying element is in the region of one of the reversal points. This makes it possible to fully compensate for the slowdown in the movement of the laying element in the region of the reversal points, which is caused by the mechanical interaction between the first crank and / or the second crank and the laying element. Even if the rotational speed of the first crank and / or the second crank is increased in certain positions of the laying element, the method according to the invention still leads to an increase in efficiency, since the laying element does not have to be braked and the direction of movement does not have to be reversed by the drive. By varying the rotational speed, it is also possible to form special laying patterns (in particular asymmetric laying patterns) on the bobbin, which could not be easily formed using the known methods.

[0028] It is also advantageous if the laying width of the laying element changes when the bobbin is wound. As already mentioned, this allows influencing the yarn density on the bobbin in an advantageous manner.

[0029] In the description of the present invention, the movement of the laying element is described as periodic. However, this does not exclude the possibility of varying the frequency of the movement of the laying element and / or the laying width during the winding of the bobbin. As already mentioned, this may even be necessary to influence the yarn density on the bobbin. The present invention is primarily intended to move the yarn to be wound over the bobbin in a substantially cyclical motion along a variable path. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Further advantages of the present invention are described in the following exemplary embodiments. In the accompanying drawings:

[0031] Figure 1 is a schematic side view of a workstation of a textile machine according to the invention, which is designed as a winder,

[0032] Figure 2 are two embodiments of the yarn laying device according to the present invention,

[0033] Figure 3 is a third embodiment of the yarn laying device according to the present invention,

[0034] Figure 4 is a fourth embodiment of the yarn laying device according to the present invention,

[0035] Figure 5 is a fifth embodiment of the yarn laying device according to the present invention, and

[0036] Figure 6 This is a sixth embodiment of the yarn laying device according to the present invention. DETAILED DESCRIPTION

[0037] In the following description of the figures, identical reference numerals are used to denote features that are identical and / or at least comparable across the various figures. Individual features, their design, and / or mode of operation are generally only described in detail the first time they are mentioned. If the individual features are not described again in detail, their design and / or mode of operation correspond to those of the already described features, which have the same effect or have the same name.

[0038] Figure 1 The figure shows a side view of a workstation 1 of a textile machine 2 designed as a winding machine according to the present invention. In such a winding machine, a yarn 3 is wound from a spinning tube 4 onto a bobbin 5, in particular a cross-wound bobbin, produced, for example, on a ring spinning machine. To produce the cross-wound bobbin, the yarn 3 must be periodically guided over the bobbin 5 during winding. For this purpose, a yarn laying device 6 according to the present invention is used. The exact structure of the yarn laying device 6 is illustrated in the following figures. Figure 1 The structure of the yarn laying device 6 in the embodiment corresponds to Figures 3 to 6 One of the embodiments in .

[0039] In particular, Figure 1 The yarn laying device 6 in the example has a first crank drive 7 with a first drive 9 and a second crank drive 8 with a second drive 10. The first drive 9 and the second drive 10 are in particular independent of the bobbin drive 11 which drives the drive roller 12 of the bobbin 5. Figure 1 The example also includes other standard features of the workstation 1 of the winding machine. These features include a yarn suction tube 13 for locating the yarn end on the bobbin 5 or the spinning tube 4, a yarn splicer 14 for joining the yarn end, a yarn tensioner 15 for adjusting the yarn tension, a balloon limiter 16 for limiting the formation of a balloon during unwinding, and a guide element 17 for guiding the yarn. The embodiment shown here illustrates a possible use of the yarn laying device 6 according to the present invention. Similarly, for example, the yarn laying device 6 could be used directly on a spinning machine.

[0040] Figure 2 Two simple embodiments of a yarn laying device 6 according to the invention are shown. The yarn laying device 6 comprises a laying element 18 designed to move the yarn 3 to be wound in a periodic manner over the bobbin 5. Furthermore, the yarn laying device 6 comprises a drive device 19 for the laying element 18. Figure 2In each of the embodiments, the drive device 19 comprises precisely one first crank drive 7 with a first crank 20. In the embodiment on the left, the first crank 20 is directly connected to the laying element 18. The first crank drive 7 is formed by the first crank 20 and the laying element 18 itself. The force transmission element 21 of the first crank 20 (in this case, formed as a pin) is connected to the link 22 of the laying element 18 and thus makes it possible to convert the rotational movement of the first crank 20 into a periodic movement of the laying element 18 along a circular arc segment. In this example, the laying element 18 is precisely limited to one degree of rotational freedom by a pivot bearing 23.

[0041] As already described in detail above, the first crank drive 7 enables the circumferential motion of the first crank 20 to be mechanically converted into a periodic motion of the laying element 18. It is therefore not necessary to have a reversal point 24 (see Figure 6 ) at which the laying element 18 is braked and reaccelerated (in particular by a drive). This results in an increased energy efficiency of the yarn laying device 6.

[0042] exist Figure 2 In the embodiment shown on the right side of , the first crank drive 7 comprises a first connecting rod 25, which establishes a connection between the first crank 20 and the laying element 18. The first connecting rod 25 comprises two pivot bearings 23, one of which is connected to the force transmission element 21 of the first crank 20 and the other is connected to the laying element 18. The first connecting rod 25 allows the structure of the yarn laying device 6 to be made more flexible. In addition, by a suitable design of the pivot bearings 23, the friction of the drive device 19 can be reduced. Figure 2 In the embodiment on the right side, the first driver 9 of the driving device 19 is also shown, and the first driver 9 drives the first crank 20 to rotate.

[0043] In all embodiments, the laying element 18 includes a first end 26 with a yarn guide 27 and a second end 28 opposite the first end 26, wherein the first crank drive 7 in each case engages the second end 28 of the laying element 18. The yarn guide 27 of the laying element 18 includes, for example, an opening 29 for inserting the yarn 3. The yarn 3 is moved cyclically over the bobbin 5 during winding, thereby producing a cross-wound bobbin by the cyclical movement of the yarn guide 27, which is caused at least by the first crank drive 7. When the first crank drive 7 is used to generate the cyclical movement of the laying element 18, essentially only a component of the movement of the first crank 20 is transmitted to the laying element 18. This results in a slowing down of the movement of the laying element 18 in the region of the reversal point 24.

[0044] exist Figure 3 In an embodiment of the yarn laying device 6 in FIG, the slowing down of the movement of the laying element 18 in the region of the reversal point 24 is at least partially compensated by using a second crank drive 8 with a second crank 30. The second crank drive 8 includes a second connecting rod 31, which establishes a connection between the second crank 30 and the laying element 18. The first connecting rod 25 is connected to the second end 28 of the laying element 18. The second connecting rod is connected to the region 32 of the laying element 18 between the first end 26 and the second end 28. The connection of the second connecting rod 31 to the laying element 18 simultaneously forms the axis of rotation for the periodic movement of the laying element 18. In the region 32 connected to the second connecting rod 31, the laying element 18 is made wider in order to increase the stability of the laying element 18.

[0045] The second connecting rod 31 also includes two pivot bearings 23, one of which is connected to the force-transmitting element 21 of the second crank 30, and the second pivot bearing 23 is connected to the laying element 18. The first connecting rod 25 and the second connecting rod 31 engage the laying element 18 on different sides of the image plane. This avoids unilateral loading of the laying element 18, but may cause undesirable vibrations. Of course, the first connecting rod 25 and the second connecting rod 31 may also engage the laying element 18 on the same side.

[0046] In the present embodiment, the first crank 20 and the second crank 30 are driven jointly by the first drive 9. Preferably, the first crank 20 and the second crank 30 are operated offset by 180° to one another, whereby the maximum deflection of the laying element 18 occurs between the reversal points 24 of the periodic movement. In particular, the 180° offset means that the force transmission elements 21 of the first crank 20 and the second crank 30 are positioned precisely relative to each other with respect to the axis of rotation.

[0047] exist Figure 4 In the embodiment of the present invention, the yarn laying device 6 and Figure 3 The embodiment of the present invention is designed similarly. In this embodiment, the yarn laying device 6 additionally comprises a guide 33 for the laying element 18. In this embodiment, the guide 33 is designed as a linear guide and in particular as a grooved guide. In this context, linear guidance means that the translation of the laying element 18 is limited to a movement along a straight line.

[0048] exist Figure 5 In the embodiment of the present invention, the guide 33 is also designed as a linear guide. However, in this embodiment, the linear guide is specifically designed as a roller guide. The roller guide comprises two rollers 34, which are shown in dashed lines in the figure. The rollers 34 engage around a straight guide element 35, thereby limiting the translational movement of the laying element 18 to a straight line. Figure 4 Examples and Figure 5 In both embodiments, the guide 33 can also be made curved. This allows the yarn laying device 6 to be adapted to the desired properties of the cross-wound bobbins to be produced.

[0049] exist Figure 6 In the embodiment of FIG. , the guide element 33 of the yarn laying device 6 is designed as a rocker support. In this example, the guide element 33 includes a third connecting rod 36, wherein the pivot bearing 23 of the third connecting rod 36 is arranged in a fixed position. The other pivot bearing 23 of the third connecting rod 36 engages the same point on the laying element 18 at which the second connecting rod 31 of the second crank drive 8 engages. In this example, the first crank 20 is driven by the first drive 9, and the second crank 30 is driven by the second drive 10. In this figure, the reversal points 24 of the cyclical motion of the laying element 18 are shown. In the illustrated embodiment, the laying element 18 (more precisely, the first end 26 of the laying element 18 with the yarn guide 27) is located at one of the reversal points 24.

[0050] Reference Signs List

[0051] 1 workstation

[0052] 2 Textile Machines

[0053] 3 Yarn

[0054] 4 Spinning tubes

[0055] 5 Bobbin

[0056] 6 Yarn laying device

[0057] 7 First crank drive

[0058] 8 Second crank drive

[0059] 9 First Drive

[0060] 10 Second Drive

[0061] 11 bobbin drive

[0062] 12 driving rollers

[0063] 13 yarn suction tube

[0064] 14 Yarn splicer

[0065] 15 Yarn tensioner

[0066] 16 balloon limiter

[0067] 17 guide elements

[0068] 18 laying elements

[0069] 19 drive device

[0070] 20 First Crank

[0071] 21 force transmission element

[0072] 22 links

[0073] 23 pivot bearings

[0074] 24 reversal points

[0075] 25 first connecting rod

[0076] 26 First End

[0077] 27 Yarn guide

[0078] 28 Second End

[0079] 29 openings

[0080] 30 second crank

[0081] 31 Second connecting rod

[0082] 32 areas

[0083] 33 guides

[0084] 34 rollers

[0085] 35 guide elements

[0086] 36Third connecting rod

Claims

1. A yarn laying device (6) for a textile machine (2), in particular a spinning machine or a winding machine, comprising a laying element (18) and a drive device (19) for the laying element (18), wherein the laying element (18) is designed to periodically move the yarn (3) to be wound over a bobbin (5), and wherein: The drive device (19) has at least one first crank drive (7) with a first crank (20).

2. Yarn laying device (6) according to the preceding claim, characterized in that The first crank drive (7) comprises a first connecting rod (25) which establishes a connection between the first crank (20) and the laying element (18).

3. The yarn laying device (6) according to any one of the preceding claims, characterized in that The drive device (19) has a second crank drive (8) with a second crank (30).

4. Yarn laying device (6) according to the preceding claim, characterized in that The second crank drive (8) comprises a second connecting rod (31) which establishes a connection between the second crank (30) and the laying element (18).

5. Yarn laying device (6) according to the preceding claim, characterized in that The laying element (18) has a first end (26) with a yarn guide (27) and a second end (28) opposite the first end (26), wherein the first connecting rod (25) is connected to the second end (28), and wherein the second connecting rod (31) is connected to the area (32) between the first end (26) and the second end (28), in particular to the rotation axis of the laying element (18).

6. Yarn laying device (6) according to any one of the preceding claims, characterized in that The yarn laying device (6) has a guide (33) for the laying element (18).

7. Yarn laying device (6) according to the preceding claim, characterized in that The guide (33) is designed as a linear guide, a channel guide, a roller guide and / or a rocker support.

8. Yarn laying device (6) according to any one of the preceding claims, characterized in that The driving device (19) includes: a first driver (9); or the first driver (9) and a second driver (10).

9. A textile machine (2) with a yarn laying device (6), in particular a spinning machine or a winding machine, the yarn laying device (6) comprising a laying element (18) and a drive device (19) for the laying element (18), wherein the laying element (18) is designed to move the yarn (3) to be wound cyclically over the bobbin (5), characterized in that The drive device (19) has at least one first crank drive (7) with a first crank (20).

10. Textile machine (2) according to the preceding claim, characterized in that The drive device (19) has a second crank drive (8) with a second crank (30).

11. The textile machine (2) according to claim 9 or 10, characterized in that The driving device (19) includes: a first driver (9); or the first driver (9) and a second driver (10).

12. Textile machine (2) according to the preceding claim, characterized in that The first drive (9) and / or the second drive (10) are independent of the bobbin drive (11).

13. A method for operating a textile machine (2), in particular a spinning machine or a winding machine, wherein a yarn (3) to be wound is moved periodically over a bobbin (5) by a laying element (18) of a yarn laying device (6), wherein the periodic movement of the laying element (18) has two reversal points (24), at which the laying element (18) reverses the direction of its movement, characterized in that The movement of the laying element (18), in particular the reversal of the direction of movement of the laying element (18) at a reversal point (24), is caused by the interaction of at least one first crank (20) with the laying element (18).

14. The method according to the preceding claim, characterized in that The movement of the laying element (18), in particular the reversal of the direction of movement of the laying element (18) at the reversal point (24), is caused by the interaction of the first crank (20) and the second crank (30) with the laying element (18).

15. The method according to claim 13 or 14, characterized in that When the laying element (18) is located in the region of one of the reversal points (24), the rotational speed of the first crank (20) and / or the second crank (30) is changed, in particular increased.

16. The method according to any one of claims 13 to 15, characterized in that When the bobbin (5) is wound, the laying width of the laying element (18) varies.

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