JPH0130747B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides high winding of yarn by means of a cylindrical driven friction roller having a vertical axis of rotation on a tube which is rotatably and exchangeably held in a carrier device. A yarn winding device for forming a parallel winding having a yarn winding behavior in which the yarn is wound at a winding speed and intersectingly formed in each winding layer, wherein the yarn to be wound around the friction roller is partially wound; A thread winding body involved in thread winding is in contact with the outer periphery of this friction roller to drive its own rotation and to directly form the thread into a pipe spool, and it also moves up and down parallel to the rotation axis of the friction roller. The guide rail carries a rotatably supported movable vehicle, and the movable vehicle is provided with a thread fed to the movable vehicle by a first yarn feeding device and which is in contact with the movable vehicle. The movement of the yarn running towards the friction rollers is induced by a relatively slow up and down movement of a guide rail which is driven and serves to deflect this yarn towards the friction rollers and in this case to wind the yarn in parallel windings. For winding the above-mentioned yarn, the vertical movement is overlaid with a very rapid and extremely short adjusted vertical movement, and the adjusted vertical movement causes the yarn to form a cross-over of the pipe threads inside the individual winding layers. Regarding equipment.

Such yarn winding devices are mainly used in texturing machines, especially in twisting machines. This is because, for example, 400
This is because a yarn winding speed of ~1000 m/min or more is possible. However, such yarn winding devices may also be used in other textile machines.

By yarn we mean all types of yarn that can be wound on such devices, including endless yarns of natural and synthetic fibers, filament yarns,
Including monofilament yarn, twisted yarn, etc.

The tube formed by the device according to the invention is
This is a pipe yarn with a high winding density (winding density = number of yarn windings per vertical winding movement), which is usually called parallel winding. This is because, if no adjusting up-and-down movement takes place, the thread is wound by a relatively slow and long up-and-down movement of the guide bar, which forms a pure parallel winding in the traditional sense, and also a cross winding. This is because there is no such thing. However, on the other hand, due to the vertical movement of the guide bar, the threads formed by being wound up during the vertical movement of the guide bar cross each other. The tube yarn formed by winding during the stroke movement (upward or downward movement) of the guide bar also forms a winding layer. That is, the tube yarn with its individual winding layers is formed into a cross-shape by a controlled up-and-down movement. This tube thread can therefore be referred to as parallel winding with intersecting windings within each winding layer.

Furthermore, the "spiegel" of the yarn winding involved in tube formation refers to the following phenomenon. If the thread is wound only by the up-and-down movement of the guide bar, without any adjustment up-and-down movement, and the diameter of the thread winding body is constant, a pattern is formed on its circumference, starting as a diamond pattern, and then further winding. As the winding continues, it unravels into a spiral band, and the filament yarn finally takes on a mottled appearance with a smooth circumference, which then disappears again in the opposite order as the winding continues. This mottling phenomenon hinders winding formation and makes it difficult to draw the thread later. For example, in the case of filament yarns, this may even lead to yarn breakage accompanied by yarn splitting. This mottling that takes place during thread winding leads to a coarse, non-quiet movement course of the thread winding body involved in the thread formation.

In the known thread winding device of the type mentioned at the outset (German Published Patent Application No. 2551816), the thread turning mechanism is an eccentric plate with an annular thread groove, which eccentric plate has a relatively long length. An extremely short adjustment vertical movement is superimposed on the upward and downward movement of the guide rail. This adjusted up and down movement causes the thread to be wound with a continuously varying lead angle. The tube threads intersect within each of the wound layers. This allows good mutual retention of the tube threads and facilitates subsequent unwinding of the threads. However, the ratio V, which is decisive for the crossing angle of the intersecting yarn windings, of the length of the individual adjusting up-and-down movement of the yarn to the length of the yarn wound up during this adjusting up-and-down movement is relatively small. This is because the eccentricity of the eccentric plates co-driven by the threads is not very great. The angular delay and acceleration of the eccentric plate during each winding movement has a detrimental effect on the thread being driven and also reduces the reliable winding speed of the thread. Furthermore, the winding tension of the thread must be relatively high.

In order to avoid this drawback and to be able to reach significantly larger ratios V, the following configuration is proposed in the present invention, starting from a device of the type described at the outset. That is, since the moving vehicle is driven by a thread, it is provided with at least one circular drive surface that is concentric with the axis of rotation of the moving vehicle, and that the moving vehicle is provided eccentrically on the moving vehicle and that drives the thread by a friction roller. It is proposed that a second thread feed device is provided at the rear of the moving vehicle, which feeds this thread to at least one thread deflection mechanism for deflection.

In the device according to the invention, the moving wheel is driven by a thread running from a first thread feeding device to a second thread feeding device, after which the thread receives an adjustable up and down movement from the second thread feeding device. The resulting thread passes through at least one thread deflection mechanism mounted eccentrically on the moving wheel to the friction rollers. As a result, the thread region running from the second thread feeder to the friction roller is freed from the driving force of the moving vehicle, so that this region is exposed to considerably less stress than before. The winding tension of the thread is also significantly lower than that of the conventional method, and it is even possible to wind the thread with almost no tension. Furthermore, a ratio V that is significantly larger than that of the conventional method is obtained, and accordingly, a significantly larger crossing angle for forming the tube in the winding operation can be achieved. This significantly improves the mutual retention of the tube threads, and if the tube yarns have at least one conical end, they have a significantly larger cone angle than before. Therefore, even if the length of the tube yarn in the axial direction is constant, it is possible to hold many yarns. In many cases, it is also possible for at least one end of the tube thread to be flat, ie flat. It is also easier to pull out the yarn from the tube later, and it is possible to pull it out from the head without any problems than before. In the case of filament yarns, the risk of yarn breakage following yarn tearing during yarn withdrawal is also eliminated, or at least significantly reduced.

The invention also allows particularly high tube formation speeds of the yarn.

According to the present invention, it is possible to form a thread with extremely low thread tension, so it is possible to form a thread that is slightly harder than before, and in some cases, it is also possible to form a soft thread. . On the other hand, the relatively high winding tensions of the threads conventionally required always result in very stiff tubes, which often cause the tubes to carry this when the tube is not made of metal, but is made of cardboard or the like. It even happens that the tube you are in is compressed.

It is generally particularly advantageous to provide only one thread deflection mechanism. However, it is also advantageous to provide a plurality of yarn deflection mechanisms, which often cooperate to deflect the yarn in the direction of the friction rollers. This ensures that a particularly small length change of the thread area during the adjusting up-and-down movement between the second yarn feed device and the friction roller and possibly also the number of cycles of the adjusting up-and-down movement of the yarn is reduced. Even a small wavelength of the sinusoidal wave in which the signal is taken is reached.

The yarn deflection region of the yarn deflection mechanism is preferably designed straight, cylindrically, parallel to the axis of rotation of the moving vehicle and preferably has a small diameter of at most 4 mm, in particular from 1 to 3 mm. It's advantageous. This can be realized structurally very easily. A particularly simple construction is to form the yarn deflection mechanism as a straight pin which is mounted fixedly on the end face of the moving vehicle. In most cases, the yarn turning mechanism is a roller mounted eccentrically on the moving vehicle and rotatably mounted around its longitudinal axis, the rotational axis of which is oriented parallel to the moving vehicle. This is suitable for sensitive threads in order to avoid their friction in the thread deflection mechanism.

The adjusting up-and-down movement causes a change in the length of the thread region which in each case extends from the second thread feed device to the friction roller and is deflected by the thread deflection mechanism. In order to minimize this change in length, another embodiment of the invention provides that the yarn is oriented obliquely to the yarn on its way from the yarn deflection mechanism to the friction roller and is fixed to a guide bar. The reciprocating movement of the thread, which is deflected laterally from its shortest path by the deflection rail and thus takes place with a period of adjusted up-and-down movement, reduces the so-called length fluctuations of the thread on this deflection rail.

The first and second thread feed devices may be of a construction known per se, and the thread is fed without slips at a constant speed that is adjusted in each case. Advantageously, these thread feeding devices are godet rollers with associated thread winding rollers. For simplicity of construction, the second thread feeding device can be designed together with the first thread feeding device, in particular as a single driven godet roller.

The formation of the yarn winding tube is further improved by the arrangement according to claim 7, and the formation of mottling is prevented with even smaller adjustment up and down movements. In this case, in particular, the drive according to claim 7 serves for a periodic reciprocating movement of the thread guide. Therefore, the rotation speed of the moving vehicle is changed periodically. However, this periodic movement of the thread guide is often effective in preventing mottling formation.

The invention will be explained in more detail below with reference to embodiments illustrated in the accompanying drawings.

The yarn winding device 10 shown in FIG. 1 is mounted on the frame of a textile machine, which has frame parts 11, 11' (not shown in detail) and is equipped with a number of yarn winding devices. The textile machine is in particular a texturing machine, but may also be another textile machine.

The yarn winding device 10 includes a cylindrical friction roller 12 with a vertical axis of rotation. During operation, this friction roller is driven at a high, in particular constant, circumferential speed. A rotation bearing on the leg side (not shown) of this friction roller is provided in the machine frame portion 11. This friction roller 12 has a tube 14 which is rotatably and exchangeably held around a support device 13 which can be pivoted about a vertical axis of rotation and a tube 14 which is mounted on this tube 14 after the winding has started. The pipe body 15 being wound up is pressed against the friction roller 12.
The yarn 20 thus fed is wound onto a winding body at a particularly constant winding speed. The pipe thread 15 present in the wound state on the tube has a cylindrical circumferential surface which acts as a thread carrier in such a way that conical ends are formed on the upper and lower sides. Suitably, the tube 14 is cylindrical. The tube 14 and the friction roller 12 have longitudinal axes parallel to each other, so that the friction roller 1
2 and the tube 14 at the beginning of the operation, and later the tube thread 15, are in contact with each other along the generatrix of their annular cylindrical circumferential surface. The carrying device 13 has two arms 16
and a vertical shaft (not shown) supporting the same. This shaft is supported within the machine frame 11 so as to be pivotable about a rotational axis parallel to the friction roller 12, and is subjected to a rotational moment load by a spring, a weight, etc. The tube 14, or the thread 15 wound on it, is therefore constantly pressed against the friction roller 12 during operation. a long, relatively loose roller provided behind and at a distance from the friction roller 12 and provided by means of a device not shown;
Vertical and long up-down movement (this up-down movement is e.g.
The guide bar 19, which can be driven with
0 on a winding body to form a pipe thread 15 with two conical ends. That is, the tube yarn has a conical end and is formed in parallel windings with intersecting windings in each winding layer. For example, the vertical movement of the guide bar 19 can be gradually reduced from a maximum value to a minimum value over the entire winding process. The reverse process is also possible. For example, the moving vehicle 12 described below is mounted on a guide bar 19 via a lever carrying it so as to be movable up and down with respect to this guide bar, so that a predetermined automatic movement of this lever is possible. The height of the individual winding layers formed during each up-and-down movement of the guide bar 19 by the movement can be adjusted in a defined manner during the formation of the tube spool. For example, by moving this lever appropriately,
It is possible to create 5 conical ends. It is also possible to wind the thread 20 in such a way that the parallel winding is conical only at one end and flat at the other end, or flat at both ends.

One movable wheel 21 per thread winding device is rotatably supported on a guide bar 19 extending along all of the thread winding devices provided on the side of the machine about a horizontal axis of rotation. The moving wheel 21 is provided with a circular circumferential groove oriented coaxially to the axis of rotation for the thread driving it. This thread is machine frame 1
The yarn is fed into the circumferential groove of the movable wheel 21 by a yarn feeding device consisting of a winding roller 31, which is provided at 1' and belongs to a driven godet roller 30, is guided through a thread guide 29, and is again connected to the godet roller 30 and the winding roller 31. Return to Before the yarn runs to the moving vehicle, and after leaving the moving vehicle, it is wound many times around a godet roller 30 and a winding roller 31 in order to move this moving vehicle without slipping, and then the thread is wound from the godet roller 30. It runs in the direction of the friction roller 12 and into an annular cylindrical thin pin 25 which is fixed to both front faces of the moving vehicle. This pin is mounted eccentrically on the wheel 21 with its longitudinal axis parallel to the axis of the moving car, and the rotation of the pin in an annular trajectory about the axis of the moving car gives the thread a very rapid adjustment stroke. Give exercise. The yarn is thus wound onto the tube 14 in a sinusoidal serpentine line, so that the windings of each winding layer cross each other. The thread 20 runs from the pin 25 to the back side of the friction roller 12 opposite the observation position in FIG. The yarn 15 is wound directly from the contact line that abuts the friction roller 12 and is formed into a tube yarn 15 that is driven only by the friction roller 12. According to actual experiments, winding was carried out at the following values: Winding speed: 700 m/Axial length of split yarn: 30 cm Duration of each vertical movement of guide bar 19: 30
Length of adjustment vertical movement of the thread when running on the second friction roller: 14 mm Diameter of the annular groove of the moving vehicle 21: 55 mm (Note: The diameter of the annular trajectory of the pin 25 is based on the adjustment vertical movement of the thread on the friction roller. ) The moving vehicle 21 shown in FIG.
It differs from the vehicle shown in the figure in the following points. That is, this moving vehicle is provided with two annular grooves 27, 27' having different diameters and coaxially oriented with respect to each other, and furthermore, a pin 25 is provided with an annular groove 27, 27' which is oriented coaxially with respect to the moving vehicle 21. It is replaced by a roller 25 which is rotatably mounted and which deflects the thread in the direction of the friction roller 12 and produces a regulating up-and-down movement. The thread 20 is moved in a predetermined periodic or non-periodic manner by a thread guide 24 that can be reciprocated parallel to the axis of rotation of the moving vehicle 21 by a linear drive mechanism 33, for example hydraulic, pneumatic, electric or mechanical. It is moved in a regular stroke movement from annular groove 27 to annular groove 27' and back again. As a result, the rotational speed of the moving vehicle 21 changes accordingly without a change in the speed of the thread, so that the ratio V (V=length of adjustment up-and-down movement to length of yarn wound during adjustment up-and-down movement) is During the winding process, this further improves the tightness of the tube yarn and makes it possible to cope with mottling with relatively small adjustment up and down movements. In some cases, it is also possible to provide two or more annular grooves with different diameters.
Alternatively, as shown in FIG. 6, a conical drive surface 27'' is formed on the movable vehicle 21, on which the thread that drives the movable vehicle 21 comes into contact, and the movable vehicle 21 is moved by a thread guide 24 whose position can be adjusted by the drive unit 33. The rotational speed of the moving vehicle can be constantly adjusted by sliding it back and forth periodically or non-periodically parallel to the axis of rotation of the vehicle.

Figures 4A, B, C, D, E, F, G and H show eight different angular positions of the moving vehicle 21 during rotational movement. In this case, the moving vehicle is equipped with two pins 25', 25'' which rotate on the same track and are arranged with an angular offset of 180° relative to each other. is shown, and the adjustment up and down movement is formed in the manner shown.
If the diameter of this annular trajectory of these pins 25', 25'' corresponds to the annular trajectory of pin 25 in FIG. Furthermore, the length fluctuations caused by the adjustable up-and-down movement of the yarn region existing between the godet roller 30 and the friction roller 12 are extremely small for the moving vehicle 21 in FIGS. 4A-H. The annular locus of the pins 25', 25'' of the moving vehicle 21 according to FIGS. 4A to 4H can also be made larger than that of the moving vehicle 21 according to FIG. 1, so that the length of the adjustment vertical movement is increased. However, the length variations in the thread region mentioned above remain particularly small.

In order to reduce the fluctuations in the thread area between the godet roller 30 and the friction roller 12 that occur at each stage of the adjustment up-and-down movement, a deflection rail is provided between the moving vehicle 21 and the friction roller 12, as shown in the embodiment of FIGS. 5A and 5B. 35 are provided. This deflection rail is fixed to the guide bar 19 and is inclined so that the thread is deflected transversely to the lifting direction during the adjustment up-and-down movement and transversely to its running direction;
This causes the thread to be deflected to the side most extensively in the uppermost position of the pin 25, and not or only to a very small extent in its lowermost position.

To prevent the yarn from accidentally slipping off the pins during operation, the yarn turning pins or rollers 25, such as pins 25, 25', 25'', are of sufficient length and these pins or rollers are connected as shown. However, it is necessary to provide the free end with a coaxial anti-slip mechanism to prevent the thread from sliding off, such as a thin plate, or to provide the roller 25 with an annular groove for the thread. is also possible.

[Brief explanation of drawings]

FIG. 1 is a front view showing a part of an embodiment of the yarn winding device according to the present invention in a cutaway view, FIG. 2 is a side view of the device as seen in the direction of arrow A in FIG. 1, and FIG. Moving vehicle according to the second embodiment of the present invention, Nos. 4A to 4H
The figure is a front view of a moving vehicle equipped with two pins,
In this case, the wheels are each shown in angular positions offset by 45° relative to each other; FIGS. FIG. 6 is a side view of a moving vehicle according to another embodiment of the present invention. The symbols in the figure are 12...friction roller, 20...
Thread, 21...Moving vehicle, 25, 25', 25'', 25
... Yarn turning mechanism, 30, 31 ... Yarn feeding device.

Claims (1)

[Scope of Claims] 1. The thread is wound at a high winding speed by means of a cylindrical driven friction roller having a vertical axis of rotation on a tube which is rotatably and exchangeably held in a carrier device. A yarn winding device for forming a parallel winding having a yarn winding behavior in which the yarn is wound crosswise in each winding layer, and the yarn to be wound is partially wound around the friction roller. A guide rail on the outer periphery of which a thread winding body that participates in thread winding is in contact to drive its own rotation and to form the thread directly into a pipe winding, and which also moves up and down parallel to the rotation axis of the friction roller. , the guide rail carries a rotatably supported moving vehicle, the moving vehicle being driven by a thread fed to and abutting the moving vehicle by a first yarn feeding device, and Against the up-and-down movement of the yarn running towards the friction rollers, which is induced by the relatively slow up-and-down movement of the guide rails which serve to deflect this yarn in the direction of the friction rollers and in this case to wind the yarn into parallel windings. In the device for winding the yarn, the device is constructed in such a manner that very rapid and extremely short adjusting up-and-down movements are repeated, whereby the yarn forms a cross-over of the tubes inside the individual winding layers, the moving vehicle 21 is provided with at least one circular drive surface concentric to its axis of rotation in order to be driven by the thread 20;
and a second yarn feeding device 30, 31 which supplies the yarn to at least one yarn turning mechanism 25, 25', 25'', 25, which is eccentrically provided on the moving vehicle and which turns the yarn in the direction of the friction roller 12. A device for winding up the yarn, characterized in that the yarn turning mechanism 25, 25', 25'', 25 has a yarn turning area located at a position opposite to the rotational axis of the moving wheel. provided in a straight line, cylindrical shape, and parallel to the axis,
Apparatus according to claim 1. 3. Pins 25, 25', 2 whose linear and cylindrical area of the thread deflection mechanism has a diameter of up to 4 mm and which are fixed end-side to the moving vehicle.
5''. 4. The yarn turning mechanism is a roller 25 which is rotatably journalled about its longitudinal axis, and the rotation of this roller The device according to any one of claims 1 to 3, wherein the axis is oriented parallel to the axis of the moving vehicle.5. The device according to any one of claims 1 to 4, which is formed integrally with the yarn feeding devices 30, 31. 6. The device to which the first and/or second yarn feeding devices belong. The device according to any one of claims 1 to 5, which is formed by a thread winding roller 31 and a driven godet roller 30. 7. A large number of drive surfaces 27 of different diameters of the moving vehicle. ,2
7', 27'', and a thread guide 24 which is movable in position approximately parallel to the rotational axis of the moving vehicle, and the position of this thread guide is moved by a drive mechanism 33. 7. Device according to any one of claims 1 to 6, in which the thread can be moved alternately to drive surfaces of different diameters in order to change the rotational speed of the moving vehicle.8. The device according to claim 7, which is configured to periodically reciprocate the thread guide.
9. A device according to any one of claims 1 to 8, formed by. 10. The device according to claim 7 or claim 8, in which the yarn contact surfaces of different diameters are formed by a single conical truncated surface 27''. 11. On the path from the deflection mechanism to the friction roller 12, a deflection rail 35, which is oriented obliquely to this thread and is fixedly mounted on the guide bar 19, adjusts from its shortest path of movement transverse to the direction of vertical movement. of the length induced by the adjusted up-and-down movement of the yarn region which is deflected in the direction of the friction roller and thus exists between the second yarn feed device and the point at which the yarn rests on the friction roller. 11. The device according to claim 1, wherein the device is configured such that the fluctuation is shortened.12. 12. An apparatus according to any one of claims 1 to 11, which comprises: