EP3597804A1 - Thread tensioning device for a twisting or knitting machine - Google Patents

Abstract

The invention relates to a thread tension influencing device 10 for a twisting or cabling machine 1 for feeding a thread 17 via a traversing thread guide 14 to a take-up spool 16, the thread tension influencing device 10 being connected to a first deflecting roller 21 downstream of a thread treatment device for guiding the thread guide 17 from a balloon the thread treatment device and for deflecting the thread 17, a second deflection roller 22 downstream in the thread transport direction of the first deflection roller 21 for further deflection of the thread 17, a third deflection roller 23 downstream in the thread transport direction for adjusting the wrap angle of the thread 17 by a lead roller 11 and a leading roller 11 downstream of the third deflecting roller 23 in the thread transport direction for regulating the thread tension A thread clamping and cutting device 19, and a sensor device 20 connected downstream in the thread transport direction of the first deflecting roller 21 for monitoring the thread 17, are provided, the second deflecting roller 22 being arranged on another plane of a horizontal plane 26 formed by the axis of rotation of the first deflecting roller 21 is.

Description

The invention relates to a thread tension influencing device for a twisting or cabling machine, a work station of a twisting or cabling machine comprising such a thread tension influencing device and a twisting or cabling machine comprising such a job.

Through the DE 10 2011 111 725 A1 Textile machines and in particular twisting and cabling machines are described which have a friction roller for the frictional drive of a cross-wound bobbin and a thread processing device upstream of the friction roller in the thread path in the form of a lead roller. According to the DE 10 2011 111 725 A1 the textile machine has at least one drive shaft running in the longitudinal direction, to which the thread processing devices are each connected via an endless traction means, the drive shaft being equipped with a plurality of drive devices for guiding and driving an endless traction means in each case. Due to a special arrangement of the endless traction means and deflection and guide grooves on the bearing shaft of the overhung lead roller, the endless traction means can be easily and easily replaced if necessary.

From the leading roll, which usually consists of a pair of compartments, the twisted or cabled thread is fed to a traversing thread guide, which winds the thread onto a package with oscillating movements. The lead roll reduces the pre-tension of the thread before winding. The leading roller is assigned a deflecting roller which can be pivoted about the same axis of rotation about which the leading roller rotates. With the deflection roller, the wrap angle of the thread around the lead roller can be increased or decreased. Accordingly, a greater reduction in the thread tension is achieved with a larger wrap angle and a smaller reduction in the thread tension with a smaller wrap angle. The bobbin build-up can be improved by reducing the pre-tension of the thread.

In practice, the advance roller is usually preceded by a so-called pneumatic differential thread sensor and further deflection rollers. The differential thread button monitors the running thread for a voltage drop and cuts the thread if necessary. The differential thread button is pneumatically set centrally for each machine side before the twisting process begins. The deflection rollers ensure that the thread coming out of the balloon thread guide is first passed through the differential thread button and then that of the leading roller upstream, deflection roller is fed. The manual threading of the thread is difficult for the operating personnel in the area of the thread tension influencing device between the balloon thread guide and the winding device.

The yarn is guided in a meandering fashion between the serrated lock washers. The peripheral speed is higher than the wind speed. Depending on the angle of the wrap around the lead roller, more or less tension is released.

A first aspect of the invention therefore relates to a thread tension influencing device for a twisting or cabling machine for feeding a thread via a traversing thread guide to a take-up spool comprising a first deflection roller connected in the thread transport direction of a thread treatment device for guiding the thread out of a balloon thread guide through the thread treatment device and for deflecting the thread. a second deflecting roller connected downstream in the thread transport direction of the first deflecting roller for further deflecting the thread, a third deflecting roller connected downstream in the thread transport direction of the second deflecting roller for adjusting the wrap angle of the thread around a leading roller, and a leading pulley downstream of the third deflecting roller for regulating the regulating thread tension.

The thread tension influencing device is characterized in that the thread treatment device upstream in the thread transport direction of the first deflection roller is a thread clamping and cutting device, that a sensor device is provided downstream in the thread transport direction of the first deflection roller for monitoring the thread, the second deflection roller on another level Rotation axis of the first deflection roller formed horizontal plane is arranged.

Due to the separate arrangement of a thread cutting and clamping device and the sensor device, wherein the sensor device can be arranged either between the first and second or between the second and third deflecting roller, a larger distance is achieved between the deflecting rollers. In addition, the arrangement of the first and second deflection roller on a different horizontal plane means that less sharp changes in direction are necessary when threading the hand. This ensures an overall simplified handling for the operating personnel, because the sequence of movements for manual threading enables a smoother and more harmonious hand movement.

The indication that the second deflection roller is arranged on another plane of a horizontal plane formed by the axis of rotation of the first deflection roller is to be understood in the sense of the invention that the deflection rollers lying on a plane formed by the respective axes of rotation can be arranged differently. A parallel, vertical arrangement of the axes of rotation of the deflection rollers is just as conceivable as an inclined arrangement, the inclined arrangement including any angle from the vertically parallel arrangement up to 15 ° with respect to the horizontal plane formed by the axis of rotation of the first deflection roller.

Previously, the first and second deflection pulleys were arranged almost on a horizontal plane and at a relatively small center distance, so that it was more difficult for the operating personnel to thread the thread properly.

At the same time, the thread sensor, which can be set electronically for each machine side, ensures that, for example, when using a thread tension sensor, a voltage drop or an overload of the thread is reliably detected. As soon as a drop in voltage or an overload is detected, the thread clamping and cutting device is activated such that the remaining second thread is clamped and cut. In the context of the invention, for example, an optical sensor can also be used which detects a missing thread and / or a single thread. The signal of the thread sensor can also initiate an error message, for example in the form of an optically recognizable error message by a signal lamp at the work station, a spindle and / or run-on roller stop.

The advantages achieved by an overhung lead are further optimized by the arrangement of the individual components according to the invention, and the resulting compact and laterally open construction of the thread guide improves the accessibility and visibility of the thread tension influencing device. The thread run is visible, which excludes errors in the wrap. This also ensures that the thread path is the same at every work station. This leads to an identical reduction in voltage at all workplaces, which ultimately benefits the product quality.

In an advantageous embodiment, the deflection rollers, the thread clamping and cutting device, the sensor device and the lead roller are arranged on a housing of the thread tension influencing device.

By integrating all components into the assembly of the thread tension influencing device, a compact assembly is achieved which enables an overall easier handling for the operating personnel. In addition, such a component can also be used to retrofit older workplaces that are already in use or complete twisting and cabling machines.

A protective cap is preferably detachably attached to the housing and at least partially covers the lead roller.

The leading roller comprises a pair of serrated lock washers, between which the thread is guided in a meandering shape. In order to protect this area or to mitigate a source of danger for the operating personnel, a protective cap is detachably arranged on the housing. The protective cap can be easily removed to remove a thread spool from / from the lead roll or to replace the lead roll. An attachment of the protective cap by means of at least one screw is conceivable, for example, but other detachable attachment options are also conceivable within the scope of the invention.

The sensor device is advantageously connected upstream of the second deflection roller.

If the sensor device is arranged between the first and second deflecting roller, a distance is generated especially between these two deflecting rollers, which enables easier handling. Since the two deflection rollers are also arranged on different horizontal planes formed by their axes of rotation, manual handling is further optimized.

If the sensor device is further arranged such that the measuring slot is accessible from the front in a plan view of the thread tension influencing device, the thread to be threaded automatically slides into the measuring slot when it is guided over the deflection rollers.

In a further preferred embodiment of the invention, the angle of a straight line through the axes of rotation of the first and second deflection roller to the horizontal plane of the axis of rotation of the first deflection roller is between 15 ° and 75 °.

Experiments have shown that an angle between 15 ° and 75 ° is particularly advantageous. Depending on the selected angle, the sensor device is positioned accordingly.

In an advantageous embodiment, the lead roller can be driven by a continuous central shaft by means of a belt and can be uncoupled by means of a switchable clutch.

As is known from the prior art, in the case of the floating bearing of the lead roller, the drive from a central shaft takes place via an endless traction means, while the lead roller is adapted at the other end. Until now, for safety reasons, the serrated lock washers of the advance were attached to the shaft by means of overload slip clutches and the thread tension influencing device was protected with covers. In order to be able to remove a thread wrap on the lead, the entire machine side had to be stopped for safety reasons. By combining such a drive with a switchable clutch, after the thread sensor has detected a voltage drop or thread break, a signal is additionally generated, on the basis of which the leading role of the respective work station is stopped. This allows, for example, a thread winder to be safely removed without having to stop the entire machine side.

In the case of a non-driven lead roll, the threads can be inserted into the effective area of the lead roll during the starting process without the risk of winding. This also makes starting handling safer and easier. There is also no longer any danger of injuries when threading the thread into a permanently rotating lead.

In addition, the switchable clutch means that the lead roller can only be driven at the work stations where the twisting process is carried out. This means that if not all workplaces are in operation during the twisting process, the lead roller is only driven at the workplaces that produce a twist; the lead roller is not driven at unoccupied workplaces.

In a further alternative embodiment, the lead roller can be driven by a motor.

If the lead roller is directly driven by a single motor or the motor drive is transferred to the lead roller by means of a transmission element, not only can the advantages be achieved as already described, but each lead roller can be driven at a separately controlled speed, which in addition to the wrap angle also affects the Tension control of the thread to be wound affects.

A second aspect of the invention therefore relates to a work station of a twisting or cabling machine for winding a thread over a traversing thread guide to a take-up reel, with a thread tension influencing device comprising a first deflection roller connected downstream in the thread transport direction of a thread treatment device for guiding the thread out of a balloon thread guide through the thread treatment device and for the deflection device of the thread, a second deflecting roller connected downstream in the thread transport direction of the first deflecting roller for further deflecting the thread, a third deflecting roller connected downstream in the thread transport direction of the second deflecting roller for adjusting the wrap angle of the thread around a leading pulley, as well as a regulating the third deflecting roller connected in the thread transport direction for regulating the third deflecting roller ,

The job is characterized in that the thread tension influencing device is formed by a thread tension influencing device according to one of the above-described embodiments.

If the work station is equipped with such a thread tension influencing device, on the one hand this has a positive effect on the package build-up of the package and on the other hand the handling is made easier for the operating personnel.

The handling during threading in particular is made easier and easier for the operating personnel. The improved lateral accessibility and the improved visibility make it easier for the operating personnel to check the thread run at all times, which minimizes errors due to incorrect wrapping of the individual deflection rollers.

A third aspect of the invention therefore relates to a twisting or cabling machine with a plurality of workstations, for winding a thread over a traversing thread guide to a take-up spool, with a thread tension influencing device comprising a first deflecting roller connected downstream in the thread transport direction of a thread treatment device for guiding the thread out of a balloon thread guide Thread treatment device and for deflecting the thread, a second deflecting roller connected downstream in the thread transport direction of the first deflecting roller for further deflecting the thread, a third deflecting roller connected downstream in the thread transport direction of the second deflecting roller for adjusting the wrap angle of the thread around a leading roller, and a third in the thread transport roller to regulate the thread tension.

The twisting or cabling machine is characterized in that at least one job is formed by a job according to the embodiment described above.

In the case of a twisting or cabling machine designed in this way, overall machine operation is made easier for the staff, which likewise has a positive effect on the efficiency of the entire twisting or cabling machine. Since one person usually looks after several machines, each with a large number of workstations, work steps that are easier to carry out mean a time and effort advantage.

In addition, the simplified thread guidance or the simplified threading of the thread reduces sources of error which result from incorrect positioning of the thread in the thread tension influencing device.

Due to the elimination of the pneumatic differential thread sensor previously used and the first guide roller, which recorded the thread tension according to a weighing beam principle and also contained a thread clamping and cutting device, the compressed air system required for this is also eliminated, which has a positive effect on the manufacturing costs of the twisting or cabling machine.

Further features and advantages of the invention emerge from the following description of preferred exemplary embodiments of the invention, with reference to the figures and drawings which show details essential to the invention, and from the patent claims. The individual features can be implemented individually or in any combination in any preferred embodiment of the invention.

Figur 1

eine schematisierte Vorderansicht einer Zwirn- oder Kabliermaschine, deren Arbeitsstellen mit der erfindungsgemäßen Fadenspannungsbeeinflussungseinrichtung ausgestattet sind;

Figur 2

eine schematisierte Darstellung der erfindungsgemäßen Fadenspannungsbeeinflussungseinrichtung;

Figur 3

eine schematisierte Darstellung der erfindungsgemäßen Fadenspannungsbeeinflussungseinrichtung aus Figur 2 in Seitenansicht;

Figur 4

eine schematisierte Darstellung der erfindungsgemäßen Fadenspannungsbeeinflussungseinrichtung, wobei die Voreilrolle von einer Zentralwelle angetrieben wird und eine elektrisch schaltbare Kupplung aufweist;

Figur 5

eine schematisierte Darstellung der erfindungsgemäßen Fadenspannungsbeeinflussungseinrichtung, wobei die Voreilrolle motorisch angetrieben wird.

Preferred embodiments of the invention are explained in more detail below with reference to the accompanying drawings.

Figure 1

a schematic front view of a twisting or cabling machine, the workstations of which are equipped with the thread tension influencing device according to the invention;

Figure 2

a schematic representation of the thread tension influencing device according to the invention;

Figure 3

a schematic representation of the thread tension influencing device according to the invention Figure 2 in side view;

Figure 4

a schematic representation of the thread tension influencing device according to the invention, wherein the lead roller is driven by a central shaft and has an electrically switchable clutch;

Figure 5

a schematic representation of the thread tension influencing device according to the invention, wherein the lead roller is driven by a motor.

In the Figure 1 a twisting or cabling machine 1 is shown in a schematic front view. Textile machines of this type each have a multiplicity of identical work stations 2 in the region of their machine longitudinal sides.

In addition, such textile machines generally have a drive and operating unit 6 arranged on the machine end, in which, for example, the required energy devices, various drives and a central control device 7 are installed.

In the exemplary embodiment, the twisting or cabling machine 1 also has a bobbin transport system, the schematically illustrated delivery point of which is identified by the reference number 8.

As is known, the work stations 2 of twisting or cabling machines 1 with outer thread feeder each have a creel 3, which serves to accommodate at least one first supply spool 4, from which a so-called outer thread is drawn off.

Such workplaces 2 furthermore each have a spindle, which is not shown in the figures of the present application for reasons of better clarity, which is driven by a spindle drive. Such a spindle drive can be a motor that drives the spindle directly, or an indirect drive, for example a belt drive.

The in the embodiment of Figure 1 Each spindle, which is arranged behind a displaceably mounted protective wall 5, also carries, as usual, a second supply bobbin on a stationary bobbin bottom arranged on the spindle, from which a so-called inner thread is drawn overhead, which is fed to a balloon thread guide 18 above the spindle.

The outer thread is drawn off from the first supply spool 4, which is stored in the creel 3, in this exemplary embodiment guided further over a creel brake 9, and then circles the spindle to form a free thread balloon. The balloon thread guide 18, in which the outer thread drawn off from the first supply spool 4 and the inner thread drawn off from the second supply spool are brought together, determines the height of the free thread balloon that is being formed. In this device, also referred to as a compensation system, there is the thread point in which the outer thread and the inner thread converge.

The thread tension influencing device 10 is arranged above the twisting point, by means of which the twisted thread 17 is fed to a winding device 12 via the lead roller 11.

The winding device 12 has, as usual, a drive roller 13 and a traversing thread guide 14. By means of the traversing thread guide 14, the thread is wound onto a take-up spool 16, which is driven by the drive roller 13 by frictional engagement and held in a bobbin frame 15.

Figure 2 shows a thread tension influencing device 10 according to the invention. The thread 17 is fed by the balloon thread guide 18 in the thread transport direction F to a first deflecting roller 21 and passes a thread clamping and cutting device 19. The thread 17 is guided in the direction of a second deflecting roller 22 from the first deflecting roller 21, whereby the thread 17 passes through a sensor device 20. The thread 17 passes from the second deflecting roller 22 via a third deflecting roller 23 to the leading roller 11.

As schematically in Figure 2 arranged, the third deflecting roller 23 can be positioned manually, as is known and therefore not explained in more detail here, in different positions, so that the thread 17 runs onto the leading roller 11 with a different wrap angle. This means that with a larger wrap angle there is a greater reduction in the thread tension and with a smaller wrap angle there is a smaller decrease in the thread tension.

From the advance roll 11, the thread 17 is wound with a traversing thread guide 14 with oscillating movements onto a winding spool 16 set in rotation by the drive roller 13. Furthermore, a protective cap 24 is attached to the housing 25 of the thread tension influencing device 10, as a result of which the rotating lead roller 11 is at least partially covered.

Also in Figure 2 a control and display panel with function keys is arranged on the front side of the housing 25 of the thread tension influencing device 10, via which the thread tension influencing device 10 can be put into operation or out of operation, for example.

Figure 3 shows the thread tension influencing device 10 Figure 2 in side view. The advance roller 11 is driven by a belt 28 by a central shaft 29 arranged lengthwise of the machine.

Furthermore shows Figure 3 an advantageous range of the angle of a straight line 27, which is formed by the axes of rotation of the first deflection roller 21 and 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 labeled α1 is 15 °, while the angle labeled α2 is 75 °.

Figure 4 shows an embodiment of the thread tension influencing device 10, in which the lead roller 11 is driven by a belt 28 by a central shaft 29. The reference numeral 30 denotes a clutch, which is designed here as a disk clutch. The flange of the coupling housing is fastened with fastening points in the housing 25 of the thread tension influencing device 10.

By means of such a switchable clutch 30, for example in the case of a thread winding, the lead roller 11 can be decoupled from the driving central shaft 29, that is to say the front disk of the clutch 30 continues to rotate after the decoupling, but the rotation is no longer transmitted to the lead roller 11 , causing it to stop. Since couplings 30 are known per se and are not the subject of the invention, a detailed description is omitted here.

Figure 5 shows an alternative embodiment in which the lead roller 11 is driven by a single motor. In the housing 25 of the thread tension influencing device 10 there is a motor 31 which drives the lead roller 11 directly. Via a transmission element 32, formed here as a belt, the drive roller 13 is additionally driven by the motor 31. In the event of a voltage drop in the thread 17 or a thread break, the motor 31 is stopped and the lead roller 11 stops rotating. In this way, for example, a thread winding that has occurred can be safely removed without the lead rollers 11 of the other work stations 2 also having to be stopped.

LIST OF REFERENCE NUMBERS

1

Twisting or cabling machine

2

jobs

3

gate

4

supply bobbin

5

bulkhead

6

Drive and operating unit

7

control device

8th

delivery point

9

Gate thread brake

10

Yarn tension influencing device

11

advance roller

12

rewinder

13

drive roller

14

Traversing thread guide

15

creel

16

up bobbin

17

thread

18

Balloon thread guide

19

Thread clamping and cutting device

20

sensor device

21

First pulley

22

Second pulley

23

Third pulley

24

protective cap

25

casing

26

WL

27

Just

28

belt

29

central shaft

30

clutch

31

engine

32

transmission element

Claims (9)

Thread tension influencing device (10) for a twisting or cabling machine (1) for feeding a thread (17) via a traversing thread guide (14) to a package (16), the thread tension influencing device (10) comprising: a first deflection roller (21) connected downstream of a thread treatment device in the thread transport direction for guiding the thread (17) out of a balloon thread guide (18) through the thread treatment device and for deflecting the thread (17), a second deflecting roller (22) downstream of the first deflecting roller (21) in the thread transport direction for further deflecting the thread (17), a third deflecting roller (23) connected downstream of the second deflecting roller (22) in the thread transport direction for adjusting the wrap angle of the thread (17) around a leading roller (11), an advance roller (11) downstream of the third deflecting roller (23) for regulating the thread tension, characterized, that the thread treatment device upstream in the thread transport direction of the first deflection roller (21) is a thread clamping and cutting device (19), that there is a sensor device (20) downstream of the first deflection roller (21) in the thread transport direction for monitoring the thread (17), wherein the second deflection roller (22) is arranged on another plane of a horizontal plane (26) formed by the axis of rotation of the first deflection roller (21). Thread tension influencing device (10) according to claim 1, characterized in that the deflecting rollers (21, 22, 23), the thread clamping and cutting device (19), the sensor device (20) and the lead roller (11) on a housing (25) of the thread tension influencing device (10) are arranged. Thread tension influencing device (10) according to claim 1, characterized in that a protective cap (24) is releasably attached to the housing (25), which at least partially covers the lead roller (11). Thread tension influencing device (10) according to claim 1, characterized in that the sensor device (20) is connected upstream of the second deflection roller (22). Thread tension influencing device (10) according to claim 4, characterized in that the angle of a straight line (27) through the rotation axes of the first (21) and second (22) deflection roller to the horizontal plane (26) of the rotation axis of the first deflection roller (21) between 15 ° and Is 75 °. Thread tension influencing device (10) according to claim 1, characterized in that the advance roller (11) can be driven by means of a belt (28) from a continuous central shaft (29) and can be decoupled by means of a switchable clutch (30). Thread tension influencing device (10) according to claim 1, characterized in that the lead roller (11) can be driven by a motor. Work station (2) of a twisting or cabling machine (1), for winding a thread (17) over a traversing thread guide (14) to a take-up spool (16), with a thread tension influencing device (10) comprising a first deflection roller (21) connected downstream of a thread treatment device in the thread transport direction ) for guiding the thread (17) out of a balloon thread guide (18) through the thread treatment device and for deflecting the thread (17), a second deflection roller (22) downstream of the first deflection roller (21) in the thread transport direction for further deflection of the thread (17), a third deflecting roller (23) downstream of the second deflecting roller (22) in the thread transport direction for adjusting the wrap angle of the thread (17) around a leading roller (11), and a leading roller (11) downstream of the third deflecting roller (23) for regulating the thread tension .
characterized,
that the thread tension influencing device (10) is formed by a thread tension influencing device (10) according to one of the preceding claims. Twisting or cabling machine (1) with a plurality of workstations (2), for winding a thread (17) over a traversing thread guide (14) to a package (16), with a thread tension influencing device (10) comprising a first one connected downstream of a thread treatment device in the thread transport direction Deflection roller (21) for guiding the thread (17) out of a balloon thread guide (18) through the thread treatment device and for deflecting the thread (17), a second deflection roller (22) downstream of the first deflection roller (21) for further deflection of the thread ( 17), a third deflecting roller connected downstream of the second deflecting roller (22) in the thread transport direction (23) for setting the wrap angle of the thread (17) around a leading roller (11), and a leading roller (11) downstream of the third deflecting roller (23) for regulating the thread tension,
characterized,
that at least one job (2) is formed by a job (2) according to claim 8.

Images