WO2008154967A1

WO2008154967A1 - Thread holder

Info

Publication number: WO2008154967A1
Application number: PCT/EP2008/000572
Authority: WO
Inventors: Roger Weber
Original assignee: SSM Schärer Schweiter Mettler AG
Priority date: 2007-06-21
Filing date: 2008-01-25
Publication date: 2008-12-24
Also published as: TW200920677A

Abstract

The invention proposes a thread holder for holding a thread of a yarn during the production of a yarn spool around which the yarn will be wound, particularly for holding a thread end of the thread during a change of the yarn spool. The thread holder has a clamp ring (20) for clamping the thread, wherein the clamp ring (20) has two substantially ring-shaped clamp jaws (22, 23), and the clamp jaws (22, 23) surround a rotatable drive shaft (25) of a drive flange (1) for a sleeve receptacle for the yarn spool. An electromagnetic drive is provided on the thread holder, wherein the drive is arranged to press the clamp jaws (22, 23) together to clamp the thread, preferably with a force component in the axial direction of the drive shaft (25).

Description

thread holder

The invention relates to a yarn holder for holding a thread of a yarn in the production of a yarn to be wound with the yarn package, in particular for holding a yarn end of the yarn in a Garnspulenwechsel (doff process), with a clamping ring for clamping the yarn, wherein the clamping ring two substantially having annular jaws and surround the clamping jaws a rotatable drive shaft of a drive flange for a sleeve receptacle for the yarn package.

When winding bobbins the problem arises that the yarn package on which the yarn is wound up, has to be changed when a mostly predetermined amount of yarn has been spooled onto the yarn package. For this purpose, a new bobbin case, e.g. inserted, plugged and / or clamped, on which the yarn is then further wound up. The aim is to enable a fully automatic Garnspulenwechselprozess (Doffprozess). For this purpose, it is necessary to hold the aufzuspulenden thread in the yarn path in front of the yarn package to use that, after removing the finished yarn package, free yarn end of the yarn as Bewicklungsanfang new to be wound new yarn package problems.

The known thread holder used for this purpose have a clamping ring, the clamping jaws are pneumatically actuated. For this purpose, a compressed air connection (pneumatic connection) must be provided on the thread holder. Pneumatically actuated thread holders are designed to be complicated due to the compressed air guides to be provided therein and therefore can not be made very compact. In some known pneumatic thread holders rotatable by means of a drive shaft drive flange for a sleeve receptacle for the yarn package is structurally integrated. For the pneumatic connection then a sliding clutch is provided, which is subject to wear. The arrangement of Garnspulenaufspulvorrichtungen with such thread holders is complicated by the necessary pneumatic connection and has a high space requirement.

The invention has for its object to provide a thread holder, which avoids the disadvantages of the prior art, in particular, a compact design of the thread holder itself and a Garnspulenaufspulvorrichtung with the thread holder should be possible.

This object is achieved by the thread holder of the independent claim. The dependent claims represent preferred embodiments of the invention.

A thread holder according to the invention is suitable for holding a thread of a yarn in the production of a yarn package to be wound with the yarn, in particular for holding a thread end of the thread in a yarn

Garnspulenwechsel. The thread holder according to the invention has a clamping ring for clamping the thread, wherein the clamping ring has two substantially annular clamping jaws and surround the clamping jaws a rotatable drive shaft of a drive flange for a sleeve receptacle for the yarn package. According to the invention, an electromagnetic drive is provided on the thread holder, wherein the drive is arranged to compress the clamping jaws for clamping the thread, preferably with a force component in the axial direction of the drive shaft. The thread holder according to the invention dispenses with the pneumatic actuation usual in the prior art. It is therefore also no pneumatic connection necessary, which in particular wear parts, such as a sliding clutch, can be dispensed with. It is therefore possible a compact design using fewer components.

Advantageously, the drive shaft is preferably mounted on at least one ball bearing in a stationary bearing bush of the thread holder and the jaws are mounted together with the drive flange on the drive shaft, such that the jaws are rotatable together with the drive flange. A held thread then rotates with a clamped bobbin case. As a result, a free end of the thread can be wound on the retained thread without further measures on a newly clamped bobbin tube.

Preferably, the drive has an electromagnetic coil, wherein the

Lead windings of the coil are wound around the drive shaft, such that by means of the coil, a magnetic field in the axial direction of the drive shaft can be generated. By means of such a coil, the compression of the jaws can be achieved in a particularly simple manner.

Very advantageously, the coil is stationarily positioned in the bearing bush and the jaws are arranged in the axial direction of the drive shaft between the spool and the drive flange, preferably wherein the drive flange adjacent jaw of the jaws is slidably mounted for clamping the thread in the axial direction of the drive shaft coil. Due to the stationary positioning of the coil, no moving parts are necessary for actuating the drive. It can be made a non-contact operation of the clamping ring. If a coil spring is provided on the thread holder which is adapted to press apart the jaws in the axial direction of the drive shaft, such that a gap between the jaws for inserting the thread to be held, the jaws without actuation of the electromagnetic drive, ie switched off automatically in a Pressed position in which it is possible to insert a thread in the gap. An actuation of the drive is then only necessary to effect a pinching of the thread.

If a coil spring is provided on the thread holder, set up the

Compressing clamping jaws in the axial direction of the drive shaft, such that a gap between the jaws for holding a thread inserted therein is closed, a guided between the jaws thread is automatically held when switching off the current flowing through the coil. The coil, that is, the solenoid formed by the coil is then used for the opening of the jaws, so for releasing a trapped thread between them.

A particularly compact construction of the thread holder according to the invention can be achieved in that the spiral spring is arranged annularly around the drive shaft.

An inventive Garnspulenaufspulvorrichtung for a yarn manufacturing machine has a yarn holder according to the invention and a freely rotatable flange, wherein the flange forms together with the drive flange of the yarn holder a sleeve receiving the Garnspulenaufspulvorrichtung. In this case, a thread laying device and / or a thread storage device is preferably provided, the thread laying device and / or the thread storage device being set up, the thread being clamped between the clamping jaws insert the thread holder. The doffing process can thereby be performed fully automatically when an automatic Gamspulenhülsenwechselvorrichtung exists. For this purpose, after a first yarn package has been wound up and the rotation of the yarn package is preferably stopped, the yarn is moved by means of the yarn laying device and / or the yarn

Thread storage device laid in the open gap between the jaws. Subsequently, the thread holder according to the invention is actuated for clamping the thread. Now the bobbin is taken out of the sleeve receptacle and the thread between the bobbin and thread holder cut or torn off. Then a new bobbin tube in the

Clamped sleeve receptacle. Finally, the rotation of the bobbin tube is started via the drive shaft of the thread holder. In particular, by suitable laying of the thread along the longitudinal axis of the new bobbin tube, the free end of the thread is then wound onto the new bobbin tube and the thread holder can release the thread by switching off the electromagnetic coil.

The invention will be explained in more detail by means of embodiments with reference to the drawings.

Show it :

1 shows a thread holder according to the invention in a cross section;

Figure 2 shows a Garnspulenaufspulvorrichtung invention with a thread holder according to the invention;

Figure 3 is a three-dimensional representation of the invention

Thread holder of Figure 2; FIG. 4 shows a section through a three-dimensional view of a thread holder according to the invention; FIG. 5 shows a further sectional view through a thread holder according to the invention with an open gap between the clamping jaws; FIG. 6 shows excerpts from the sectional view of FIG. 5;

Figure 7 shows another embodiment of a thread holder according to the invention in a cross section;

The representations of the drawings show the subject matter according to the invention in a highly schematized manner and are not to be understood to scale. The individual components of the article according to the invention are shown so that their structure can be well shown.

FIG. 1 shows a thread holder according to the invention in a cross section. The thread holder has a drive flange 1 for a sleeve receptacle for the yarn package. By means of a clamping ring 20, a yarn of a yarn which is wound on a clamped in the sleeve receptacle bobbin, are clamped. For this purpose, the clamping ring has two substantially annular clamping jaws 22, 23. The clamping jaws 22,23 surround a rotatable drive shaft 25, to which the drive flange 1 by means of a screw 27 rotatably screwed into a arranged on the axis of rotation of the drive shaft 25 screw hole 5. The thread holder is essentially rotationally symmetrical about this drive shaft 25. Between the screw 27 and the drive shaft 25, a washer 8 is inserted. An electromagnetic drive is provided on the thread holder, the drive being arranged to compress the clamping jaws 22, 23 for clamping the thread, with a force component in the axial direction of the drive shaft 25. For this purpose, the drive has an electromagnetic coil 30 (magnetic coil), wherein the conductor windings of the coil 30 are wound around the drive shaft 25, such that by means of the coil 30, a magnetic field in the axial direction of the drive shaft 25 can be generated. The drive shaft 25 is mounted on two ball bearings 10,34 in a stationary bearing bush 37 of the thread holder and the jaws 22,23 are mounted together with the drive flange 1 on the drive shaft 25. As a result, the clamping jaws 22, 23 are rotatable together with the drive flange 1. The ball bearings 10,34 are mounted on a socket 6 spaced from each other.

The coil 30 is stationarily positioned in the bearing bush 37. The jaws 22, 23 are arranged in the axial direction of the drive shaft 25 between the spool 30 and the drive flange 1. In this case, the drive flange adjacent jaw 22 (slide) is slidably mounted in the direction of the coil 30 for clamping the thread in the axial direction of the drive shaft 25. At the thread holder a coil spring 2 (compression spring) is provided. This is annularly arranged around the drive shaft 25 around and presses the jaws 22,23 apart in the axial direction of the drive shaft, so that a gap 40 between the jaws 22,23 for inserting the festzuhaltenden thread.

Now, if an electric current of sufficient current and flow direction passed through the coil 30, the drive flange adjacent jaw 22 to the other jaw 23 (counter-holder), against the spring force of the coil spring 2, used and located in the gap 40 thread is between the Clamping jaws 22,23 clamped. For this purpose, the drive flange adjacent jaw 22 is at least partially formed of a magnetic material or at least parts of a magnetic material are attached thereto. If the power is switched off again, the coil spring 2 presses apart the clamping jaws 22, 23, so that the thread is released.

At the drive flange facing away from the end of the drive shaft 25, a toothed belt wheel 11 is screwed for driving the rotational movement of the drive shaft 25 to the drive shaft by means of another screw 9 rotatably. Similar to a washer, a lid-like seal 4 is arranged between the toothed belt wheel 11 and the drive shaft 25.

FIG. 2 shows a yarn package winding apparatus according to the invention with a yarn holder 50 (clamping ring mounting) according to the invention, shown on the right in the figure. The position of the thread holder 50 is shown by an arrow. The thread holder 50 is attached to a rail 53 via an arm 52 (winding bar). Parallel to the arm 52, a toothed belt 55 for driving the rotation of the drive shaft of the thread holder 50 extends. A freely rotatable flange 60 is shown on the left in the figure, attached via a further arm 62 to the rail 53. The two flanges, so the freely rotatable flange 60 and the drive flange 1 of the thread holder 50, form a sleeve receptacle, between which a bobbin tube for winding a yarn package can be clamped. The clamping ring bearing is fastened to the winding bar and at the same time serves for receiving the sleeve, wherein the actual clamping ring lies directly behind the drive flange 50.

FIG. 3 shows a three-dimensional view of the thread holder 50 according to the invention from FIG. 2. The drive flange 1, the clamping ring adjoining the drive flange, two clamping jaws 22, 23, and the gap 40 formed between the clamping jaws 22, 23 are easily recognizable.

FIG. 4 shows a section through a three-dimensional representation of a thread holder according to the invention.

The clamping ring serves as a thread holder of the free end of the thread to realize a new coil start Doffprozess. It is important that the held thread rotates with the sleeve. For this reason, the counter-holder 23 via, for example, three spacers 70 fixed to the drive flange. 1 connected. As a result, the counter-holder 23 rotates with the drive flange 1. At the same time serve the spacers 70 as a driver of the slider 22 so that it always rotates with the drive flange 1. The slider 22 is guided on the drive shaft 25 as a mounting shaft and is pressed by the coil spring 2 against the drive flange 1, so that the clamping ring is open in the normal state.

Once the thread is inserted into the clamping ring, the slider 22 is pulled by the solenoid 30 in the bearing bush 37 to the anvil 23. As a result, the thread between the slider 22 and the counter-holder 23 is clamped. The flange can rotate without contact even when the thread is clamped.

FIG. 5 shows a further sectional view through a thread holder according to the invention with an open gap (open state) between the clamping jaws. In this case, parts that rotate only about the axis of rotation of the drive shaft (drive axle) are marked by arrows 160. The drive flange adjacent jaw is marked with a further arrow 170 as a part which can rotate about the drive axis and is linearly guided in the axial direction of the drive shaft (axial direction). Stationary, i. non-moving parts are marked with additional arrows 180.

FIGS. 6a and 6b show sections from the sectional view of FIG. 5. The open state is shown in FIG. 6a. The arrow marks the gap between the jaws 22,23, in which a thread can be inserted. In Figure 6b, the closed state of the clamping ring is shown. In this case, the gap between the clamping jaws 22, 23 is closed by actuating the magnetic coil 30, that is, by passing a suitable electric current through the magnetic coil 30. Such a thread can be clamped between the jaws 22,23 or be trapped. FIG. 7 shows a further embodiment of a thread holder according to the invention. The structure of this thread holder substantially corresponds to the structure of the thread holder of Figure 1, but by means of the thread holder provided on the spiral spring (2), the clamping jaws (22,23) in the axial direction of the drive shaft (25) are compressed, so that the gap (40 ) is closed between the jaws (22,23) for holding a thread inserted therein. The outer clamping jaw (22) is formed by the drive flange (1). In the illustrated position of the thread holder, the jaws (22,23) are closed, ie a between the jaws (22,23) guided thread would be trapped therebetween. Until the shutdown of a current flowing through the coil (30), the thread is thus automatically held. The coil (30), that is, the electromagnet formed by the coil (30), is used for opening the clamping jaws (22, 23), ie for releasing a thread clamped therebetween. For this purpose, the internal clamping jaw (23) is pulled in the direction of the coil (30) by switching on a current flowing through the coil (30).

A thread holder is proposed for holding a thread of a yarn in the production of a yarn package to be wound with the yarn, in particular for holding a yarn end of the thread in a Garnspulenwechsel, with a clamping ring 20 for clamping the thread, wherein the clamping ring 20 has two substantially annular clamping jaws 22,23 and the jaws 22,23 surround a rotatable drive shaft 25 of a drive flange 1 for a sleeve receptacle for the yarn package. In this case, an electromagnetic drive is provided on the thread holder, wherein the drive is arranged, the clamping jaws 22,23 for clamping the thread, preferably with a force component in the axial direction of the drive shaft 25, compress. The invention is not limited to the embodiments given above. Rather, a number of variants are conceivable, which make use of the features of the invention even with fundamentally different type of execution.

Claims

claims

A thread holder for holding a thread of a yarn in the production of a yarn to be wound with the yarn, in particular for holding a yarn end of the thread in a Garnspulenwechsel, with a clamping ring (20) for clamping the thread, wherein the clamping ring (20) has two in the Has substantially annular clamping jaws (22,23) and the clamping jaws (22,23) surround a rotatable drive shaft (25) of a drive flange (1) for a sleeve receptacle for the yarn package, characterized in that the thread holder, an electromagnetic drive is provided, wherein the Drive is arranged, the clamping jaws (22,23) for clamping the thread, preferably with a force component in the axial direction of the

Drive shaft (25) to compress.

2. Thread holder according to claim 1, characterized in that the drive shaft (25) preferably via at least one ball bearing (10,34) in a stationary bearing bush (37) of the thread holder is mounted and the jaws (22,23) together with the drive flange ( 1) on the drive shaft (25) are mounted, such that the clamping jaws (22,23) together with the drive flange (1) are rotatable.

3. Thread holder according to one of claims 1 to 2, characterized in that the drive comprises an electromagnetic coil (30), wherein the conductor windings of the coil (30) wound around the drive shaft (25) around are such that by means of the coil (30), a magnetic field in the axial direction of the drive shaft (25) can be generated.

4. thread holder according to claim 2 and 3, characterized in that the coil (30) is fixedly positioned in the bearing bush (37) and the clamping jaws (22,23) in the axial direction of the drive shaft (25) between the coil (30) and the Drive flange (1) are arranged, preferably wherein the drive flange adjacent jaw (22) of the clamping jaws (22,23) for clamping the thread in the axial direction of the drive shaft (25) in the direction of the coil (30) is slidably mounted.

5. Thread holder according to one of claims 1 to 4, characterized in that a spiral spring (2) is provided on the thread holder, set up, the

Clamping jaws (22,23) in the axial direction of the drive shaft (25) apart, such that a gap (40) between the jaws (22,23) for inserting the trapped thread arises.

6. Thread holder according to one of claims 1 to 4, characterized in that a spiral spring (2) is provided on the thread holder, adapted to compress the clamping jaws (22,23) in the axial direction of the drive shaft (25), such that a gap (40 ) is closed between the jaws (22,23) for holding a thread inserted therein.

7. thread holder according to one of claims 5 to 6, characterized in that the spiral spring (2) annularly around the drive shaft (25) arranged around ^■ is.

A yarn package winding apparatus for a yarn manufacturing machine having a yarn holder according to any one of claims 1 to 7 and a freely rotatable flange, said flange forming, together with the drive flange (1) of the yarn holder, a sleeve receptacle of the yarn package winding apparatus.

9. Garnspulenaufspulvorrichtung according to claim 8, characterized in that a thread laying device and / or a Fadenverwahrvorrichtung is provided, wherein the thread laying device and / or the Fadenverwahrvorrichtung is arranged, the thread to the entrapment between the jaws (22,23) of the clamping ring (20). insert the thread holder.