EP0931189B1 - Method and device for winding a roll beam - Google Patents

Description

The invention relates to a method for winding of a warp beam with the process steps accordingly the preamble of claim 1. Such a method and corresponding device are known from DE-A-43 15 222.

When wrapping a warp beam, it is important that the threads of the thread sheet between the side windows of the Kettbaums wound evenly distributed over the width of the warp beam become. DE-A-34 04 255 describes a method for this known, in the photoelectric sensors used to determine the measured values are used, each consisting of light source and receiver exist, which are arranged aligned on support arms, so that a light beam of the light source tangential to the winding of the Kettbaums can measure. Because the winding thickness when winding the thread coulter changes, the support arms can be pivoted attached to a pivoting support shaft, the thread feed side at about the level of the warp beam axis and too this is arranged in parallel and with increasing winding thickness is adjusted so that the sensors tangential to the winding circumference can measure. The support shaft construction for the Sensors are structurally complex and prevent the gate side or arrangement of a pressure roller on the thread feed side, which is expedient or necessary for leveling the winding can be.

The invention is therefore based on the object of a method with the process steps mentioned at the beginning improve that corrective intervention in the wrapping can also be done automatically during the Bewickeins, whereby the possibility of applying one to the wrap of the Kettbaums acting press roller should be preserved.

This task is characterized by the in the characterizing part of the claim 1 specified process steps solved.

It is important for the invention that in the It is determined near the side windows whether there are any accumulations of threads or empty thread areas occur. To do this in To be able to carry out a clear way is another Meaning that the measured values of the side window areas with Measured values are compared, which are obtained from a middle range become. The middle range provides the actual values, with which the measured values from the vicinity of the side windows are compared become. So would be near both side windows Thread accumulations occur or thread empty areas, so would a comparison of these measurement results from the vicinity of the two Side windows lead to misinterpretation. Surrendered in the method according to the invention, that in need of compensation If wrong winding takes place, measures are initiated with which the incorrect winding up or the deviation is eliminated become.

It is also important for the invention that optical distance sensors are used as optical sensors that can be used in a fixed arrangement. The fixed arrangement is close to the ground and below a pressure roller, that presses on the wrap. With the pressure roller equalizes the wrap. Because the pressure roller in the winding direction before the sensors is arranged, will influence accordingly taken the measurement result. Especially the measured values from the middle range, which form the basis of the measured value comparison, are smoothed.

The measures to eliminate the deviations are different, depending on the type of wrapping and the warp beam. Frequently a traversing is carried out, in which the thread coulter moved slightly back and forth between the side windows to achieve an even winding build-up, in which the wound threads in particular do not wrap into each other and jam with it. In this case the method can advantageously be modified to this effect be that a measure to eliminate the deviations Traversing the warp beam, a warping drum or one Scissors comb is changed. A traversing of the warp beam or the warping drum will be done especially if others Measures are not possible. That is for example with The archipelago is the case because here for wrapping the thread sheet usually a scissors comb from the warping drum to the warp beam is not used. However, is a scissors comb existing, the oscillation of the scissors comb can be changed become. Scissor combs are used for papering, when the coulter of thread from the bobbins of a creel the warp beam is wound up.

A traversing of the warp beam or the warping drum or The scissors comb compensates for errors that occur to the same extent occur on every side window. For example, the traversing be enlarged if close to both side windows Empty thread areas arise. An increase in traversing then leads to a better distribution of the threads the entire width of the warp beam. Instead of changing one Traversing can have the same effect when doing this can be achieved as a measure eliminating the deviations the scissor comb is set wider or narrower. As a result, the sheet is fed wider or narrower and there is an equalization of empty thread areas that occur on both side windows of the warp beam, or it will accumulate threads on the two side windows of the Avoid warp beams.

The method can advantageously be carried out in this way that as the measure eliminating the deviations Warp beam and / or the scissors comb parallel to the warp beam is or will be postponed. It takes place each an adjustment of the relative position of the side windows of the warp beam to the thread coulter instead, adjusting the warp beam is always possible, but adjusting the scissors comb only with notes. In all cases, mistakes are avoided where there is thread accumulation on one side window comes while on the other side window of the warp beam Empty thread areas arise.

It is also advantageous to carry out the method in such a way that it will be canceled automatically if it changes zero and / or minimum scissors comb width at least a measured value of a side window area above the measured value of the Middle range, or if at maximum scissor comb width and / or maximum traversing at least one measured value a side window area below the measured value of the middle area lies. If at zero oscillation at least one measured value a side window area above the measured value of the middle area there is a thread accumulation, but can no longer influenced by a reduction in the oscillation become. The same applies if the scissors comb width is minimal is set. In this case the tree width is for the thread cluster too small. If at maximum scissor comb width at least one measured value of the side window area below the measured value of the middle area is a thread empty area occurred by increasing the width of the scissors comb cannot be influenced. The same applies to the In case a maximum change has already been set. In both cases, the width of the thread band is not big enough to evenly wrap the warp beam.

The procedure can be carried out in such a way that the determination of deviations over the thickness of the roll at intervals distributed and that in the interval breaks measures to eliminate the deviations and their reactions respectively. This means that measurement and setting is carried out section by section. This is usually sufficient and there are no complex Means needed while measuring and Correct to avoid mistakes.

The invention relates to a device for winding a warp beam with the features of the generic term of claim 7.

For this device known from DE-A-34 04 255 the disadvantages described above apply.

The invention has for its object a device with the features of the preamble of claim 7 to improve so that corrective interventions in the wrapping also take place automatically during winding can, the possibility of applying one to the The winding of the press roll acting on the warp beam is retained should.

This task is characterized by the characteristics of the license plate of claim 7 solved.

There are optical distance sensors, their measuring beams each directed towards the winding of the warp beam are that an adjustment with increasing winding thickness is not is necessary. The distance sensors can therefore be in a fixed arrangement be there, where it is no further disturb, namely below the space for a pressure roller. The Pressure roller presses on the winding of the warp beam and leveled the wrap, being on the running threads suppressed. It is in front of the distance sensors in the direction of the thread arranged so that the leveling of the winding as described above. But above all they are Pressure roller and the distance sensors arranged in one area, where they did not take out the wrapped warp beam disturb, namely on the thread run-up side or gate side. The Accordingly, warp beam can be turned away from the pressure roller Side of the device removed and inserted unhindered become.

The optical distance sensors enable contactless Measure and can with simple evaluation units interact. The optical distance sensors are quick to react and deliver highly precise measured values.

The sensors that measure the winding thickness are common with the winding thickness sensor, the measured values of an evaluation unit in the sense of determining differences of the measured values are supplied. With the evaluation unit it is possible to influence the control device in such a way that the relative position of the side windows and the Thread coulter are automatically influenced during the winding can.

The device can be designed so that the actuating device an axial setting device and / or a traversing device of the warp beam and / or a warping drum. Such training is in a variety use of winding machines, both for papering, as with the archipelago.

The device is advantageously used for this in the form of a slip trained that the actuator the traversing a scissors comb and / or its relative position in parallel to the warp beam and / or the width of the scissors comb. The adjustment means are then less expensive because less Mass must be moved.

The device can be designed so that measuring beams all sensors in the same plane through the longitudinal axis of the warp beam are arranged. As a result, in measured in a plane in which the winding at all measuring points must be the same thickness.

It is useful if all sensors on a warp beam parallel Carrier are mounted. Conventional Mounting devices are used and it becomes a reliable fixed arrangement achieved.

Fig. 1

eine Seitenansicht eines teilweise bewickelten Kettbaums, und

Fig.2

eine Ansicht in Kettbaumlängsrichtung auf eine schematisch dargestellte Zettelmaschine.

The invention is explained in more detail using an exemplary embodiment shown in the drawing. It shows:

Fig. 1

a side view of a partially wound warp beam, and

Fig.2

a view in the longitudinal direction of the warp beam on a schematically shown warping machine.

The warping machine has a warp beam 10 made by one Drive motor is rotated, winding a thread sheet 11. The thread sheet 11 consists of a large number of threads, which are unwound from the coils of a creel. The thread sheet 11 passes through a scissors comb 13 and is fed to the winding tree 10 via a deflection roller 15. The Warp beam 10 has a warp beam axis 10 ', on both sides of each a side window 12 is limited. Outside of everyone Side window 12 are flange 16 for pivoting the Warp beam 10 present on which a motor, not shown attacks. The scissor comb 13 ensures an orderly feed the threads of the thread sheet 11 to the deflecting roller 15. In each scissor comb gap becomes a predetermined number of threads inserted so that the thread sections leaving the scissor comb 13 are arranged next to each other and so too run onto the deflection roller 15 and thus onto the warp beam 10. Fig. 2 shows the course of the sheet at the beginning of Winding process with a thread share section 11 'and against End of the winding process with a thread share section 11 ". Starting at 11 ', the wrap is built up in layers, until the diameter of the side window 12 further wrapping no longer allows. Between the side windows 12 must proper winding so that the practically warp beam width thread group 11 on the average with your Center over the middle between the two side windows 12. It should be taken into account that usually a traversing the thread group takes place so that when lying on top of each other Thread coulters the threads are not exactly one above the other, but are wound laterally offset. It follows a more stable structure of the winding 15. With such a structure is prevented that those under winding tension threads running up between the already wound Cut the threads. To further even out the winding structure is shown in Fig.2 that the accumulating threads of the yarn share section 11 'pressed by a pressure roller 17 become.

Conventionally, setting the exact thread feed makes Trouble. The starting position of the thread group 11 between the side windows 12 can be adjusted by eye are, or measuring aids are used with which the relative position between the warp beam 10 and thread family 11 is set in the axial direction of the warp beam. Nevertheless it can happen that the threads near the side window Thread group 11 run against the side window 12 or from remove this. This is particularly possible when there is a change becomes. Such traversing is achieved, for example, by the warp beam 10 slightly in its axial direction is moved back and forth. Instead, or at the same time it is also possible to move the thread coulter back and forth. For this can influence the warping drum or the scissors comb 13 be taken. Fig.2 shows a motor M1, with which the Scissor comb 13 can be made wider or narrower the width of the scissors comb 13 on the between the side windows 12 available warp beam width. M2 denotes a motor with which the scissor comb 13 is vertical adjusted to the display level as a whole and in its width can be to the relative position of the side windows 12th and to be able to influence the thread family 11. For example the middle of the thread sheet 11 on the between the Side windows 12 located center of the warp beam. In principle, the traversing can also be done with the M2 motor be effected, more advantageous for traversing the scissors comb 13, however, is a particular third motor that is not shown has been. The control of the described motors for the scissors comb 13 and for the warp beam 10 is done by one Evaluation unit, not shown, with sensors 14,14 'cooperates. The measured values of the sensors 14, 14 'influence the relative position of the Side disks 12 and adjusting device influencing the thread sheet 11, for example, the actuator for traversing the scissors comb 13.

Inaccuracies in the setting, the behavior of the Thread group 11 when winding up and the behavior of the warp beam 10 during winding can lead to the winding 15 deviates from the ideal. Fig.1 shows the two basic possibilities of wrong winding construction. Accumulations of thread can occur near the side windows 12 form that to an increasing winding circumference 18th to lead. However, empty thread areas 19 can also be set, the near the side windows 12 to a sloping Guide winding circumference 20. Both forms of publication can be detected with the sensors 14. The sensors 14 are optical distance sensors and give the respective distance corresponding measured values. Because the phenomena described above can occur on both side windows 12 are in immediate Neighborhood of these side windows each measurements required.

There is a winding thickness sensor between the measuring points of the sensors 14 14 'available, for example exactly on the Measures middle between the two side windows 12. All sensors 14, 14 'are arranged in the same way, ie measure same circumferential point of the winding 15 or take one any radial beam of the warp beam 10 the same angular position on. This is shown in FIG. 2, which is a carrier 21 for mounting the sensors 14, 14 '. The mounting device was not executed because it is arbitrary. The radially arranged Sensors 14, 14 'each generate a measuring beam 22 and all measuring beams 22 lie in the same plane through the Longitudinal axis of the warp beam 10.

If the measured values of the sensors 14 differ from the measured value of the Deviate winding thickness sensor 14 ', action is required. Measures must be taken to deal with the deviations can be eliminated. It does not matter that the Actual value of the winding thickness measured with a medium thickness sensor 14 ' becomes. The Evaluation unit is able to convert the required measured values for the required evaluation.

The measures to be taken to eliminate the Hang deviations in the winding thickness near the side windows 12 on the winding process carried out in each case. The Control device, which by the sensors, the evaluation unit and the actuating means is able to to recognize the respective error and to eliminate it to take suitable measures automatically.

If a change in the wrap circumference is only near a side window 12 found, there is only an increasing wrap circumference 18 or a falling winding circumference 20 as the only one before, the scissor comb 13 is sloping in the direction of the Winding circumference or against the direction of increasing Wrapped circumference shifted. Are near every side window 12 rising or falling wrap sizes available, so the scissor comb 13 is set wider or narrower. Is a rising on one of the side windows 12 Winding circumference 18 and on the other side window 12 a falling Winding circumference 20 is present, so the scissors comb 13 adjusted in the direction of the falling circumference 20.

Alternatively, if the wrap circumference increases on both sides 18 or falling wrap circumference 20 with the scissors comb 13 carried out change can be changed, with increasing Wrapped circumference 18 reduced and decreasing wrap circumference 20 enlarged.

When arching with subsequent trees, i.e. with subsequent Wrapping the coulter of threads from the warping drum on the warp beam 10, corrective measures can be taken No influence on the position of a scissor comb was carried out are usually not used becomes. Nevertheless, corrective measures are possible by by influencing the position of the warp beam 10, the relative position changed between warp beam 10 and thread sheet 11 becomes. A cluster only becomes close to one of the side windows 12 or found a thread empty area, i.e. an increasing one or a falling winding circumference 18 or 20, so the warp beam 10 can be moved. When the wrap circumference drops 20 away from the thread empty area 19 and with increasing Wrap circumference 18 in the direction of the accumulation. Occur leave accumulations or thread empty areas on both sides, so leave these cases by changing the change of the Switch off the warping drum. Is a thread empty area on a side window 12 19 trained and on the opposite Side window 12 a cluster, so the warp beam 10 in Shifted towards accumulation. As a result, will be close the side window 12 with thread empty area 19 more threads wound up, so that the thread empty area 19 disappears, and less threads are wound up, so that the accumulation disappears.

The measures described for the archipelago can also applied to a note machine according to FIGS. 1, 2 either exclusively or in addition to the measures with the scissors comb 13.

If in the warping on both side windows 12 each Accumulations or empty thread areas 19 occur, one is useful Adjustment of the warp beam 10 not if both winding errors are the same size. In this case, the change must be influenced can be taken by the occurrence of clusters reduced and when thread empty areas occur 19 is enlarged.

With both of the winding processes described above, that the traversing is zero or that the minimum scissors comb width was set and still a measured value of a Side window area above the measured value of the middle area lies. In this case, the range of threads is set too large, so not warp beam wide. To have to Then measures are taken to find an appropriate one To achieve adaptation, for which the winding process is interrupted becomes. In such a case, the evaluation unit initiates a corresponding display after the automatic has been stopped. The winding process or the system is also switched off and there is an indication when the oscillation is maximum or if the maximum scissor comb width has been set and at least one measured value of a side window area below the measured value of the middle range. In this case too a change in the control device in the sense of troubleshooting not possible anymore. Rather, the width of the Thread sheet 11 with respect to the distance between the side windows 12 be enlarged from each other.

The sensors 14, 14 'described above scan the winding circumference continuously from and accordingly is one continuous regulation possible. On the other hand, it is also possible, the evaluation, the measurement of the winding thickness at intervals to interrupt or determine deviations the measured values of the side window areas over the thickness to distribute the winding 15 at intervals. In the interval breaks can then eliminate any deviations are carried out by the measures described above become. This method is particularly advantageous in order to reduce the expenditure on equipment. It is necessary, to eliminate errors that affect the control range of the automatic exceed.

With the three sensors 14, 14 ′ described above, the Cylindricalness of the roll 15 continuously checked and adjusted be, so that also a visual surveillance and manual adjustment of the winding of a warp beam is not necessary.

Claims (11)

1. Method of winding onto a warp beam (10), wherein a yarn sheet (11) is wound on practically over the width of the warp beam between side discs (12) of the warp beam (10), wherein the relative position of the side discs (12) of the warp beam (10) with respect to the yarn sheet (11) is detected by measuring technology and the two are aligned accordingly, wherein, during winding, particularly relative positions which deviate from the alignment are corrected in that the winding thickness in each case in the proximity of the side discs (12) and therebetween is measured by optical sensors (14), the measurement values of the side disc regions are subsequently compared with the measurement values from the middle region, and in the event of deviations of the measurement values of the side disc regions from those of the middle region actions to correct these deviations are then implemented, wherein the threads running onto the warp beam (10) are pressed by a pressing roller (17), and that [sic] optical distance sensors fixedly arranged below the pressing roller (17) are used as optical sensors (14, 14'), characterised in that the pressing roller is disposed on the thread run-on side, ie. upstream of the sensors in the winding direction.
2. Method according to claim 1, characterised in that one action to correct deviations is changing the traversing of the warp beam (10), of a warp cylinder or of a warping comb (13).
3. Method according to claim 1 or 2, characterised in that one action to correct deviations is setting the warping comb (13) wider or narrower.
4. Method according to claim 1, 2 or 3, characterised in that one action to correct deviations is setting the warp beam (10) and/or the warping comb (13) displaced in an axially parallel manner with respect to the warp beam.
5. Method according to claim 1, 2, 3 or 4, characterised in that it is automatically interrupted if, during traversing of zero and/or minimal warping comb width, at least one measurement value of a side disc region is higher than the measurement value of the middle region, or if, in the case of maximum warping comb width and/or maximum traversing, at least one measurement value of a side disc region is lower than the measurement value of the middle region.
6. Method according to claim 1, 2, 3, 4 or 5, characterised in that the detection of deviations over the thickness of the winding (15) is carried out at intervals, and that actions to correct deviations and the reactions thereto take place in the pauses between the intervals.
7. Device for winding a yarn sheet (11) onto a warp beam (10), having a measuring device detecting the relative position of side discs (12) of the warp beam (10) with respect to the yarn sheet (11), the measuring results of which measuring device can be used by an adjusting device influencing the relative position of the side discs (12) and the yarn sheet (11), having optical sensors (14) detecting the winding thickness in the proximity of the side discs (12), between which optical sensors is disposed an optical winding-thickness senor (14') supplying actual values, and having an evaluation unit determining differences in the measurement values of the senors (14) detecting the winding thickness on the one hand and of the winding thickness sensor (14') on the other hand, the evaluation results of which evaluation unit can be used by the adjusting device in order to influence the relative position of the side discs (12) and the yarn sheet (11) during winding, wherein the threads running onto the warp beam (10) are pressed by a pressing roller (17) and that [sic] optical distance sensors are fixedly disposed below the pressing roller (17), characterised in that the pressing roller is disposed on the thread run-on side, ie. upstream of the sensors in the winding direction.
8. Device according to claim 7, characterised in that the adjusting device acts upon an axial setting device and/or a traversing device of the warp beam (10) and/or of a warp cylinder.
9. Device according to claim 7 or 8, characterised in that the adjusting device influences the traversing of a warping comb (13) and/or the relative position thereof parallel to the warp beam (10) and/or the warping comb width.
10. Device according to claim 7, 8 or 9, characterised in that measuring beams of all sensors lie in the same plane through the longitudinal axis of the warp beam (10).
11. Device according to claim 7, 8, 9 or 10, characterised in that all sensors (14, 14') are mounted on a carrier (21) parallel to the warp beam .

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