YARN-TENSION INFLUENCING DEVICE FOR A TWISTING OR CABLING MACHINE

Abstract

Yarn-tension influencing device for a twisting or cabling machine for feeding a yarn via a traversing yarn guide to a take-up package, the yarn-tension influencing device having a first deflection roller, arranged downstream of a yarn handling device in the yarn transport direction and is provided for guiding the yarn from a balloon yarn guide through the yarn handling device and for deflecting the yarn; a second deflection roller, arranged downstream of the first deflection roller in the yarn transport direction and is provided for further deflection of the yarn; a third deflection roller, arranged downstream of the second deflection roller in the yarn transport direction and is provided for adjusting the angle of wrap of the yarn around an advance roller; and an advance roller, arranged downstream of the third deflection roller in the yarn transport direction and is provided for regulating the yarn tension. The yarn handling device is a yarn clamping and cutting device, and a sensor device is provided for monitoring the yarn, the second deflection roller being arranged on a plane different from a horizontal plane formed by the axis of rotation of the first deflection roller.

Claims

1. A yarn-tension influencing device for a twisting or cabling machine for feeding a yarn via a traversing yarn guide to a take-up package, the yarn-tension influencing device comprising: a first deflection roller, which is arranged downstream of a yarn handling device in the yarn transport direction and is provided for guiding the yarn from a balloon yarn guide through the yarn handling device and for deflecting the yarn; a second deflection roller, which is arranged downstream of the first deflection roller in the yarn transport direction and is provided for further deflection of the yarn; a third deflection roller, which is arranged downstream of the second deflection roller in the yarn transport direction and is provided for adjusting the angle of wrap of the yarn around an advance roller; and an advance roller, which is arranged downstream of the third deflection roller in the yarn transport direction and is provided for regulating the yarn tension, characterized in that the yarn handling device, which is arranged upstream of the first deflection roller in the yarn transport direction, is a yarn clamping and cutting device and that a sensor device, which is arranged downstream of the first deflection roller in the yarn transport direction, is provided for monitoring the yarn, the second deflection roller being arranged on a plane different from a horizontal plane formed by the axis of rotation of the first deflection roller.

2. The yarn-tension influencing device according to claim 1, characterized in that the deflection rollers, the yarn clamping and cutting device, the sensor device and the advance roller are arranged on a housing of the yarn-tension influencing device.

3. The yarn-tension influencing device according to claim 1, characterized in that a protection cap is detachably fastened to the housing, which protection cap at least partially covers the advance roller.

4. The yarn-tension influencing device according to claim 1, characterized in that the sensor device is arranged upstream of the second deflection roller.

5. The yarn-tension influencing device according to claim 4, characterized in that the angle of a straight line through the axes of rotation of the first and second deflection rollers with respect to the horizontal plane of the axis of rotation of the first deflection roller is between 15 and 75.

6. The yarn-tension influencing device according to claim 1, characterized in that the advance roller can be driven by a continuous central shaft by means of a belt and can be uncoupled by means of a switchable clutch.

7. The yarn-tension influencing device according to claim 1, characterized in that the advance roller can be motor-driven.

8. A workstation of a twisting or cabling machine, for winding a yarn via a traversing yarn guide onto a take-up package, having a yarn-tension influencing device comprising: a first deflection roller, which is arranged downstream of a yarn handling device in the yarn transport direction and is provided for guiding the yarn from a balloon yarn guide through the yarn handling device and for deflecting the yarn; a second deflection roller, which is arranged downstream of the first deflection roller in the yarn transport direction and is provided for further deflection of the yarn; a third deflection roller, which is arranged downstream of the second deflection roller in the yarn transport direction and is provided for adjusting the angle of wrap of the yarn around an advance roller; and an advance roller, which is arranged downstream of the third deflection roller in the yarn transport direction and is provided for regulating the yarn tension, characterized in that the yarn handling device, which is arranged upstream of the first deflection roller in the yarn transport direction, is a yarn clamping and cutting device and that a sensor device, which is arranged downstream of the first deflection roller in the yarn transport direction, is provided for monitoring the yarn, the second deflection roller being arranged on a plane different from a horizontal plane formed by the axis of rotation of the first deflection roller.

9. A twisting or cabling machine having a plurality of workstations, for winding a yarn via a traversing yarn guide onto a take-up package, having a yarn-tension influencing device comprising: a first deflection roller, which is arranged downstream of a yarn handling device in the yarn transport direction and is provided for guiding the yarn from a balloon yarn guide through the yarn handling device and for deflecting the yarn; a second deflection roller, which is arranged downstream of the first deflection roller in the yarn transport direction and is provided for further deflection of the yarn; a third deflection roller, which is arranged downstream of the second deflection roller in the yarn transport direction and is provided for adjusting the angle of wrap of the yarn around an advance roller; and an advance roller, which is arranged downstream of the third deflection roller in the yarn transport direction and is provided for regulating the yarn tension, characterized in that at least one workstation is formed by a workstation according to claim 8.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Preferred embodiment examples of the invention are explained in more detail below on the basis of the enclosed drawings.

[0041] FIG. 1 is a schematic front view of a twisting or cabling machine, the workstations of which are equipped with the yarn-tension influencing device according to the invention;

[0042] FIG. 2 is a schematic illustration of the yarn-tension influencing device according to the invention;

[0043] FIG. 3 is a schematic illustration of the yarn-tension influencing device according to the invention from FIG. 2 in a side view;

[0044] FIG. 4 is a schematic illustration of the yarn-tension influencing device according to the invention, wherein the advance roller is driven by a central shaft and has an electrically switchable clutch;

[0045] FIG. 5 is a schematic illustration of the yarn-tension influencing device according to the invention, wherein the advance roller is motor-driven.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0046] The following description of the embodiments of the present invention is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. The following description is provided herein solely by way of example for purposes of providing an enabling disclosure of the invention, but does not limit the scope or substance of the invention.

[0047] FIG. 1 shows a schematic front view of a twisting or cabling machine 1. Such textile machines each have a plurality of identical workstations 2 in the region of the machine longitudinal sides of such textile machines.

[0048] Such textile machines also generally feature a drive and operating unit 6 arranged at a machine end, in which drive and operating unit 6 for example the necessary energy devices, various drives and a central control device 7 are installed.

[0049] In the embodiment example, the twisting or cabling machine 1 also has a package transport system, the schematically illustrated delivery point of which is labelled with reference number 8.

[0050] As is known, the workstations 2 of twisting or cabling machines 1 with outer yarn feeding each feature a creel 3, which serves to hold at least one first feed package 4, from which what is referred to as an outer yarn is drawn.

[0051] Such workstations 2 also each have a spindle driven by a spindle drive (for better clarity, this is not shown in greater detail in the figures of the present application). Such a spindle drive can be a motor that directly drives the spindle or can be an indirect drive, for example a belt drive.

[0052] As usual, the spindle, which in the embodiment example of FIG. 1 is arranged behind a movably mounted protection wall 5, additionally bears, on a stationary spindle pot bottom arranged on the spindle, a second feed package, from which what is referred to as an inner yarn is drawn from above, which inner yarn is fed above the spindle to a balloon yarn guide 18.

[0053] The outer yarn is drawn from the first feed package 4, which is stored in the creel 3, and in this embodiment example is fed further via a creel yarn brake 9 and subsequently circles around the spindle, thus forming a free yarn balloon. The balloon yarn guide 18, in which the outer yarn drawn from the first feed package 4 and the inner yarn drawn from the second feed package are brought together, determines the height of the free yarn balloon that is formed. The twisting point, at which the outer yarn and the inner yarn merge, is located in this device, which is also referred to as a balancing system.

[0054] The yarn-tension influencing device 10, by means of which the twisted yarn 17 is fed via the advance roller 11 to a winding device 12, is arranged above the twisting point.

[0055] As usual, the winding device 12 has a drive roller 13 and a traversing yarn guide 14. By means of the traversing yarn guide 14, the yarn is wound onto a take-up package 16, which is frictionally driven by the drive roller 13 and is held in a package cradle 15.

[0056] FIG. 2 shows a yarn-tension influencing device 10 according to the invention. The yarn 17 is fed through the balloon yarn guide 18 in the yarn transport direction F to a first deflection roller 21, the yarn 17 passing through a yarn clamping and cutting device 19 in the process. From the first deflection roller 21, the yarn 17 is guided toward a second deflection roller 22, the yarn 17 passing through a sensor device 20 in the process. From the second deflection 22, the yarn 17 reaches the advance roller 11 via a third deflection roller 23.

[0057] As schematically arranged in FIG. 2, the third deflection roller 23 can be manually positioned in different positions, as is known and therefore not explained in greater detail here, so that the yarn 17 runs onto the advance roller 11 with different angles of wrap. That is, a greater decrease in the yarn tension occurs in the case of a greater angle of wrap and a lesser decrease in the yarn tension occurs in the case of a lesser angle of wrap.

[0058] From the advance roller 11, the yarn 17 is wound, via a traversing yarn guide 14 with oscillating movements, onto a take-up package 16, which is rotated by means of the drive roller 13.

[0059] Moreover, a protection cap 24 is mounted on the housing 25 of the yarn-tension influencing device 10, the rotating advance roller 11 thereby being at least partially covered.

[0060] FIG. 2 also shows that an operating and indicating field having function buttons is arranged on the front side of the housing 25 of the yarn-tension influencing device 10. By means of the operating and indicating field, the yarn-tension influencing device 10 can be put into and taken out of operation, for example.

[0061] FIG. 3 shows the yarn-tension influencing device 10 from FIG. 2 in a side view. By means of a belt 28, the advance roller 11 is driven by a central shaft 29 arranged over the length of the machine.

[0062] Moreover, FIG. 3 shows an advantageous range of the angle of a straight line 27, which angle is formed by the axes of rotation of the first deflection roller 21 and of the second deflection roller 22 with respect to the horizontal plane 26 formed by the axis of rotation of the first deflection roller 21. The angle labelled with 1 is 15, while the angle labelled with 2 is 75.

[0063] FIG. 4 shows an embodiment example of the yarn-tension influencing device 10 in which the advance roller 11 is driven by a central shaft 29 by means of a belt 28. A clutch, which is formed as a disc clutch here, is labelled with reference number 30. The flange of the clutch housing is fastened at fastening points in the housing 25 of the yarn-tension influencing device 10.

[0064] By means of such a switchable clutch 30, it is possible, for example in the event of a yarn coil, to uncouple the advance roller 11 from the driving central shaft 29, i.e. the front disc of the clutch 30 continues to rotate after the uncoupling but the rotation is no longer transferred to the advance roller 11, which thus comes to a standstill. Because clutches 30 are known per se and are not a subject of the invention, a detailed description is not provided here.

[0065] FIG. 5 shows an alternative embodiment example in which the advance roller 11 is driven by a single motor. In the housing 25 of the yarn-tension influencing device 10, there is a motor 31, which directly drives the advance roller 11. By means of a transmission element 32, formed as a belt here, the drive roller 13 is additionally driven by the motor 31. In the event of a drop in the tension of the yarn 17 or a yarn break, the motor 31 is stopped and the advance roller 11 stops rotating. Thus, for example, a yarn coil that has occurred can be safely removed without the advance rollers 11 of the other workstations 2 also having to be shut down.

LIST OF REFERENCE NUMBERS

[0066] 1 Twisting or cabling machine [0067] 2 Workstations [0068] 3 Creel [0069] 4 Feed package [0070] 5 Protection wall [0071] 6 Drive and operating unit [0072] 7 Control device [0073] 8 Delivery point [0074] 9 Creel yarn brake [0075] 10 Yarn-tension influencing device [0076] 11 Advance roller [0077] 12 Winding device [0078] 13 Drive roller [0079] 14 Traversing yarn guide [0080] 15 Package cradle [0081] 16 Take-up package [0082] 17 Yarn [0083] 18 Balloon yarn guide [0084] 19 Yarn clamping and cutting device [0085] 20 Sensor device [0086] 21 First deflection roller [0087] 22 Second deflection roller [0088] 23 Third deflection roller [0089] 24 Protection cap [0090] 25 Housing [0091] 26 Horizontal plane [0092] 27 Straight line [0093] 28 Belt [0094] 29 Central shaft [0095] 30 Clutch [0096] 31 Motor [0097] 32 Transmission element

[0098] It will therefore be readily understood by those persons skilled in the art that the present invention is susceptible of broad utility and application. Many embodiments and adaptations of the present invention other than those herein described, as well as many variations, modifications and equivalent arrangements, will be apparent from or reasonably suggested by the present invention and the foregoing description thereof, without departing from the substance or scope of the present invention. Accordingly, while the present invention has been described herein in detail in relation to its preferred embodiment, it is to be understood that this disclosure is only illustrative and exemplary of the present invention and is made merely for purposes of providing a full and enabling disclosure of the invention. The foregoing disclosure is not intended or to be construed to limit the present invention or otherwise to exclude any such other embodiments, adaptations, variations, modifications and equivalent arrangements.