EP0382943B1 - Method and device for laying an auxiliary yarn around a bobbin of a spinning machine - Google Patents

Abstract

In order to lay an auxiliary thread on a yarn carrier of a spinning machine located at the spinning point, a piece of auxiliary thread (6.1) clamped at both ends in guided holding devices (35, 15) is laid on the yarn carrier and looped together with one of the holding devices (35) around the yarn carrier (40), which is stationary but free to rotate, until the piece of auxiliary thread (6.1) entrains the yarn carrier (40) by friction, and the yarn carrier (40) which is entrained in rotation automatically winds a further piece of the auxiliary thread (6) against a restraining action of the second holding device (15). As a predetermined limit is imposed on the length of the auxiliary thread, the latter can be completely removed by a cleaning section in a downstream automatic cross bobbin winder. The yarn quality of the auxiliary thread need not be identical to that of the spun yarn.

Description

The invention relates to a method and an operating device for applying an auxiliary thread to a yarn carrier located at the spinning position of a spinning machine according to the preamble of claim 1 or claim 20. A method or an operating device of this type is, for example, DE-A-25 01 338.

A yarn carrier is understood to be a tube which is either empty or has a package, i.e. is already partially wound with yarn. The method and the operating device, which is also referred to as an operating robot, can be used to fix thread breaks during the spinning process and for robot-assisted piecing or for winding after doffing on a ring spinning machine.

Operating robots are known which search for thread breakage, for example in ring spinning machines, the thread end on the bobbin thread pack, thread it through the runner etc. and attach it to the drafting system exit. If the search for the end of the thread is unsuccessful, such an operating robot puts the relevant spinning position out of operation by means of a corresponding device, for example by interrupting the fuse, the operating personnel subsequently having to remedy the broken thread. In order to increase the efficiency of the spinning machine, it has therefore already been proposed to eliminate the search process for the thread end on the package and instead to throw an auxiliary thread onto the package. The cop removed during doffing then has two or more separate ones if this operation is successful Thread lengths.

The auxiliary thread is applied in accordance with the prior art, e.g. by blowing a free auxiliary thread end onto the package. For example, from the aforementioned DE-A-25 01 338 a method for blowing a free auxiliary thread end onto a take-up spool is known, in which the free end of the auxiliary thread is stored in a storage device in such a way that it is under tension and thus has no sag with respect to the auxiliary thread spool can be held. The thread of the auxiliary thread should keep its twist so that no loops are formed. The blown end of the auxiliary thread should be carried away by the rotating package until a sufficiently long piece of the auxiliary thread is wound up.

This and similar solutions are still subject to fundamental shortcomings. First, the presence of a yarn package is assumed for blowing on the auxiliary thread, since the success of the blowing depends on the static friction between the thread body and the auxiliary thread. The auxiliary thread cannot be blown onto an empty thread tube. Secondly, this blowing process does not succeed in practice with the required reliability, because the time at which the thread is taken along by the spindle is not defined, but is purely coincidental. This also means that the length of the auxiliary thread remains indefinite. This has the consequence that not all piecing can be completely removed by cleaning cuts during cross winding, so that the auxiliary thread must always correspond to the yarn quality just spun. When changing lots, all auxiliary yarn supplies must also be replaced. Furthermore, automatic piecing, that is to say the winding of the empty tubes, when the spinning machine is started up, after doffing or after a batch change with the proposals which have become known is not possible.

Further examples of operating robots which are designed to correct thread breaks on a ring spinning machine can be found in US Pat. Nos. 3,445,997, DAS 1,760,259 and US Pat. No. 3,628,320. With all such robots, it is necessary to carry out certain work on the spindle of the processing position (spinning station). Such work includes e.g. to find the end of the thread on the bobbin (thread bobbin) carried by the spindle or to wind an auxiliary thread on the bobbin, to thread a thread with the traveler, etc.

All known solutions only work from the "front", i.e. the robot normally runs along a machine side, which can be referred to as the "front" with respect to the corresponding row of spinning stations. If the robot has to do work at a certain point, it first positions at this point and then extends working elements from this front into the spinning position. In such circumstances, it is almost impossible to make controlled movements of the working elements around the entire circumference of the spindle. Starting from the prior art according to DE 25 01 338, it is therefore an important object of the present invention to propose a method and a device which make it possible to ensure that an auxiliary thread is securely wound onto a sleeve, regardless of whether the sleeve is provided with a package or not.

This object is achieved by the method according to claim 1 and the operating device according to claim 20. It is now possible to produce a connection of the auxiliary thread to the sleeve that is successful with high reliability. The piece of auxiliary thread to be wound is clamped resiliently on two sides. The positions of the clamping points are always clearly defined. Your movements are absolutely clear and reproducible through appropriate guides or coordinate controls. After the first mechanical wrapping of the sleeve with the auxiliary thread in the context of this defined controlled process, the sleeve set in rotation by the gripping auxiliary thread takes over the further winding of the thread itself, as a result of which the winding process is extremely reliable and within a very short time and without the uncertainties of a "trial". and-error "procedure expires. A particularly advantageous consequence of this measure is the possibility of limiting the length of the auxiliary thread used to a certain extent, so that the auxiliary thread can be completely removed in a subsequent automatic winder by a cleaning cut with certainty. As a consequence, any auxiliary thread can now be used. It no longer has to be identical to the spun thread. This means that the operating robot can also be replaced without further adaptation measures with regard to the auxiliary thread, for example for maintenance work on the robot while the spinning machine is in operation. It is particularly advantageous to use an auxiliary thread with a rough surface for automatic cleaning of the rotor and the other thread guide elements.

In addition, the first turns on the sleeve or, if present, on the package can be clamped by further winding the auxiliary thread in such a way that the winding connection of the auxiliary thread, e.g. on particularly smooth sleeves.

If the position of the first turn is placed in the vicinity of the upper limit of the ring bank stroke, a possibly existing package is detected in the area of its cone, so that the auxiliary thread winding is covered directly by the package. In addition, the winding ring can have a smaller diameter have and therefore particularly good because with less inertia, be flexible.

A decisive advantage of the winding device described is that auxiliary thread start and end are held by components, the positions of which are clearly determined. The auxiliary thread, which is elastically clamped between two "grippers", can be manipulated three-dimensionally in this way, so that the winding location on the sleeve furthermore the type of winding formation and also the length of the auxiliary thread to be wound from the operating device, e.g. can be controlled by program specifications. Under these conditions, the above-described winding can be ensured with a high degree of reliability by utilizing a towing effect through the yarn tube or the yarn body itself. The winding process is controlled in a clearly defined sequence of movements, which is no longer influenced by randomness, as is the case e.g. was the case when blowing a free auxiliary thread end on the package according to the prior art.

With the help of the described winding method and the winding device, there are also significant advantages when winding after doffing. The winding of the empty sleeves can be robot-controlled, with a particularly high reliability of the winding process being achieved. In addition, a batch change can also take place fully automatically, avoiding the manual and time-consuming process that has previously been time-consuming and personnel-intensive.

The proposed solution can be used particularly advantageously in conjunction with a method as described in CH patent applications 4126/88 and 3545/88 (= EP-A-360 287), in particular for cops with multiple thread lengths and using one Cop preparation station.

The method according to the invention can in particular be carried out reliably in practice if one proceeds in accordance with claims 15 to 18.

The invention further provides an operating device according to claim 20. The device is characterized by means for forming a guide around the spindle axis and means for moving at least one working element, for example holding an end of the auxiliary thread piece or moving the ring traveler, along this guide.

The means for forming a guide can comprise a carrier section which can be advanced by moving in a direction transverse to the spindle axis on the spindle or on a cop carried by the spindle. The guide can comprise an essentially annular raceway, but which can have an opening in order to enable the guide to be advanced on the spindle without the guide first having to be moved above the uppermost end of the spindle or the cop.

The means for moving a working element can comprise an essentially ring-shaped operating runner or winding ring, which, however, can also have an opening for the purpose already described. In the preferred embodiment, both the track and the operator runner are C-shaped. Means are preferably provided to determine the position of the operating runner in the circumferential direction with respect to his career, so that when the device is delivered to the spindle, the openings of the two C-shaped parts are aligned with one another.

The working element carried by the operator runner can, for example, be a clamping point for dragging a thread or an element to strip the spinning ring. The latter element could, for example, be used to move the ring traveler when threading the thread and could include a brush for this purpose.

The carrier section preferably comprises a drive means for rotating the service runner about the axis of the track, which can be approximately aligned with the spindle axis when it is fed to the spindle. Such a drive means may comprise a ring gear and a transmission means which transmits the rotation of the ring gear to the operator runner. The transmission means can comprise a positive connection. A plurality of transmission elements can then be provided, so that at least one element remains connected to the operating rotor when the other element is opposite the opening of a C-shaped operating rotor and therefore can no longer transmit the rotation from the ring gear.

The carrier section can also be a controllable actuating mechanism e.g. have a rocker arm for actuating a working element carried by the operating runner (e.g. opening or closing a clamping device) when the operating runner lies in a predetermined position relative to the carrier section.

Further important and advantageous embodiments of the method according to the invention and the device according to the invention can be found in the further claims, which are not expressly recognized above.

All in all, the measures set out here result in a very high starting success when winding, the aids used being simple in structure.

Fig. 1

eine schematische Darstellung zur Erläuterung der Zusammenarbeit eines Bedienungsroboters mit einem Bedienungsgerät gemäß dieser Erfindung,

Fig. 2

eine schematische Darstellung einer Steuerung für das Bedienungsgerät der Fig. 1,

Fig. 3

eine Draufsicht des Bedienungsgerätes der Fig. 2 in seiner Arbeitsposition an einer Spindel,

Fig. 4

eine Ansicht in der Längsrichtung der Ringspinnmaschine gesehen mit dem Bedienungsgerät in eine erste Arbeitsstellung,

Fig. 5

eine Draufsicht in Richtung des Pfeils A der Fig. 4 mit einem Bedienungsläufer des Gerätes in einer Bereitschaftsstellung,

Fig. 6

eine ähnliche Draufsicht, nachdem der Bedienungsläufer begonnen hat, sich aus der Bereitschaftsstellung zu bewegen,

Fig. 7

eine Seitenansicht entsprechend Fig. 4 mit dem Bedienungsgerät in einer zweiten Arbeitsstellung,

Fig. 8

eine Draufsicht in Richtung des Pfeils A in Fig. 7 mit dem Bedienungsläufer wieder in seiner Bereitschaftsstellung,

Fig. 9

eine Draufsicht entsprechend Fig. 8 mit dem Bedienungsgerät in einer zurückgezogenen Position und mit einem vorverschobenen Fadenumlenkorgan,

Fig. 10

eine schematische, perspektivische Darstellung eines Kops und Ringläufers zur Erklärung der Anforderungen beim Einfädeln des Fadens mit dem Ringläufer,

Fig. 11

eine Draufsicht entsprechend Fig. 9, aber nach Verschiebung von einem der Fadenführungselemente,

Fig. 12

eine Draufsicht entsprechend Fig. 9, aber mit dem Bedienungsgerät wieder in seiner zweiten Arbeitsstellung,

Fig. 13

eine Seitenansicht in Längsrichtung der Maschine mit dem Bedienungsgerät in einer dritten Arbeitsstellung, und

Fig. 14

eine Draufsicht in Richtung des Pfeils A der Fig. 13 nach nochmaliger Verschiebung von einem der Fadenführungselemente.

Details and further advantages of the invention are explained in more detail below on the basis of preferred exemplary embodiments with the aid of the drawings. The selected exemplary embodiments are intended to show the principle of the invention. The invention is not restricted to the examples shown. The figures show schematically:

Fig. 1

1 shows a schematic illustration to explain the cooperation of an operating robot with an operating device according to this invention,

Fig. 2

1 shows a schematic representation of a control for the operating device of FIG. 1,

Fig. 3

3 shows a top view of the operating device of FIG. 2 in its working position on a spindle,

Fig. 4

a view seen in the longitudinal direction of the ring spinning machine with the control device in a first working position,

Fig. 5

4 shows a plan view in the direction of arrow A in FIG. 4 with an operating runner of the device in a standby position,

Fig. 6

a similar top view after the operator has started moving from the ready position,

Fig. 7

4 with the operating device in a second working position,

Fig. 8

7 shows a top view in the direction of arrow A in FIG. 7 with the service runner again in its standby position,

Fig. 9

8 with the operating device in a retracted position and with a thread deflection element advanced,

Fig. 10

1 shows a schematic, perspective illustration of a cop and ring traveler to explain the requirements when threading the thread with the ring traveler,

Fig. 11

9, but after displacement of one of the thread guide elements,

Fig. 12

9, but with the control device again in its second working position,

Fig. 13

a side view in the longitudinal direction of the machine with the operating device in a third working position, and

Fig. 14

a plan view in the direction of arrow A of FIG. 13 after another displacement of one of the thread guide elements.

The operating robot of FIG. 1 can be provided with a handling device 124 according to another European patent application, publication number 377 888 by the same applicant with the title "handling device for yarn preparation", which application was filed on the same day as this application.

1 and 2 are purely schematic representations for explaining the general principle without relation to a practical embodiment.

In FIG. 1, reference numeral 100 indicates the chassis of the operating robot for operating spinning positions on a ring spinning machine. Each such spinning station contains an assembly 101 for imparting twist and for unwinding the yarn; this unit 101 here comprises a spindle 102, a spinning ring 106 carried by a ring bench 104 and a ring traveler 108 mounted on the spinning ring 106. The chassis 100 runs along a machine side on bicycles 105 guided by a guide rail 103. A support arm 107 carries a guide roller 109, which runs in a further guide rail 113 carried by the machine and holds the chassis 100 in a predetermined position with respect to the machine. The guide rail 113 is mounted on the machine frame (not shown) by a suitable holder 115.

To carry out operating work at a spinning station, the operating robot comprises both a winding device 150, which will be explained in more detail below, and a handling device 124, which is described in detail in the aforementioned EP-A-377 888. The handling device 124 namely comprises a suction pipe 134 for receiving a predetermined thread length (not shown) with a mouth part 136 and a connection 138 to a vacuum source 132 carried by the chassis 100. The mouth part 136 of the suction pipe 134 can be indicated by a controllable articulation system 140 (only schematically indicated) ) are moved relative to the chassis 100.

After positioning the robot at a spinning position, the mouth part 136 is brought to a delivery point 128 for picking up thread 144 from a thread supply 122 carried by the chassis 100. The thread is delivered from a delivery unit 126 mounted on the chassis 100 via the delivery point 128 into the suction pipe 134 until the latter Tube has taken up a predetermined length of thread. The articulation system 140 of the handling device is then actuated in order to establish a “connection” with the winding device 150. This "connection" will be described in more detail later. After this connection has been established, the thread 144 is separated between the delivery mechanism 126 and the winding device 150 (separating means not shown), so that the thread length taken up can now be manipulated by the handling device 124 and winding device 150 independently of the supply 122 in accordance with a predetermined control program .

The schematic representation in FIG. 1 is favorable for identifying the different parts in that these parts have been shown far apart. However, the illustration is unrealistic, inasmuch as the mouth part 136 and the winding device 150 have to be guided close to one another after they have entered a single spinning position via the "surface line" 117 of the machine. For driving, however, both the handling device 124 and the winding device 150 can be retracted into the chassis 100, so that the robot has a clear distance L from the surface line 117 when traveling along the machine (with the exception of the guide system 107, 109). It follows that the coiler 150 must be movable in a direction (the "X direction") transverse to the vertical longitudinal axis of the spindle 102. In addition, the device must be movable in one direction (the "Z direction") along the spindle axis, as is clear from the description below.

2 schematically shows a drive system for moving the winding device 150 both in the X and in the Z direction. In the system according to FIG. 2, the device 150 is mounted on the piston rod 200 of a piston-cylinder unit 202. By feeding compressed air from a suitable source (not shown) to the cylinder, the piston is released from it retracted position to the right according to the side view in FIG. 2 pressed against the spindle 102. This movement is limited by a suitable stop (not shown) in order to hold the winding device 150 in a suitable, still to be described working position relative to the spindle 102. When the compressed air supply to the unit 202 is canceled, the device 150 will return from its working position to a retracted position.

The unit 202 is mounted on a slide 186, which in turn is mounted on a threaded spindle 196 via a carrier 184. The spindle 196 is mounted vertically in the chassis 100 (i.e. substantially parallel to the longitudinal axis of the spindle 102) and is coupled at one end to a drive motor 204. When the motor shaft (not shown) rotates, the spindle 196 is rotated about its own longitudinal axis in order to move the slide 186 in the Z direction (up or down). The drive motor 204 is controlled by a microprocessor with suitable programming (software); However, in order to depict the control process visually, the control program is indicated schematically by control loops or a control box. In a first state, the motor 204 is controlled by a sensor 206 via a first controller 208, in a second state by the same sensor 206 via a second controller 210 and in a third state by a controller 212.

The sensor 206 responds to the position of the ring bench 104 in order to position the slide 186 with the winding device 150 accordingly in the Z direction. The signal emitted by the sensor 206 is delivered to the first controller 208 via the switching means 214 while the robot is traveling and is delivered by switching from the switching means 214 to the second controller 210 during a certain phase of the operating work (as will be explained in more detail below). The Controller 212 controls drive motor 204 when the position of carriage 186 must be controlled independently of the ring bench position, for example when picking up the auxiliary thread at delivery point 128 (FIG. 1).

Before going into the workflow and the corresponding control, the working head of the winding device 150 will first be explained in more detail with reference to FIG. 3.

The individual spinning positions of a ring spinning machine are shielded from one another in the longitudinal direction of the machine by so-called separators 194. The working head shown in FIG. 3 comprises a carrier section 220 which remains outside the spinning station space defined by the separators 194 and a C-shaped part 222 which projects into the space of the spinning station to be operated in all working positions of the winding device 150. The C-shaped part 222 partially engages around a C-shaped operating runner 224 and forms a guide for the operating runner in the form of a raceway 226. These two C-shaped parts 222, 224 have a common axis P, which is in all working positions of the winding device aligned with the longitudinal axis of the spindle 102 or in the vicinity of the spindle axis and approximately parallel thereto. The operator runner 224 is rotatable in the track 226 about the axis P relative to the C-shaped part 222. For this purpose, the operating rotor 224 is provided with a ring gear 228 (indicated by dashed lines) and this ring gear meshes with two toothed rollers 230. The rollers 230 in turn mesh with the ring gear of a drive pulley 232 which is rotatably mounted in the carrier section 220 and by a suitable one Drive motor 234 can be rotated.

To move the device 150 into a working position on a spindle 102 by moving in the X direction (FIG. 2) from a to retracted position (without first having to move the device above the spindle tip), the opening 236 of the operating rotor or the winding ring 224 must be aligned with the opening 238 of the C-shaped part 222. The operator runner 224 is therefore provided with a suitable marking (not shown) and the C-shaped part 222 carries a sensor, which reacts to this marking, by this "ready position" of the operator rotor 224 with respect to its holder in the form of the C-shaped part 222 to the controller (not shown) for motor 234.

The access opening 240 formed thereby is wide enough to receive the spindle 102 and a sleeve 112 carried by it (FIG. 4, not indicated in FIG. 3), but not a cop 116 formed on the sleeve 112 (FIG. 4). The distance between the transfer rollers 230 in the circumferential direction of the operating rotor 224 is selected such that when the one roller 230 no longer meshes with the ring gear 228 due to the discontinuity caused by the access opening 240, the transmission of the drive forces from the disk 232 via the other rollers guaranteed to the operator runner 224 remains.

The operating rotor 224 carries two working elements, namely a clamping point or clamping device 242 and a brush 244. The clamping point 242 comprises a pin which runs vertically through a suitable bore in the operating rotor 224 and is provided with a clamping head 246 on the underside of the rotor 224. The pin is pushed up by a suitable spring load (not shown) to hold the clamping head 246 in a clamping position contacting the underside of the operator rotor. When the operator runner 224 is positioned in its ready position, this clamping device can be replaced by one on the Carrier section 220 mounted actuating mechanism 248 can be opened. This mechanism includes a rocker arm 250 with a head 252 which is just above the pin when the operator rotor 224 is in its ready position (Figs. 3 and 4). 4, the head 252 can initially be brought into contact with the pin and then moved further around the pin with the clamping head 246 against the spring load to push down.

Before the auxiliary thread has already been picked up, the device 150 is thus brought into the vicinity of the delivery point 128 by actuating the motor 204 (FIG. 2) with the aid of the control 212, the operator runner 224 being held in its ready position with respect to the part 222. By suitable movements of the mouth part 136 and the opening of the clamping device by the actuating mechanism 248, an auxiliary thread extending between the mouth part 136 and the delivery point 128 is moved into the clamping device and, by releasing the mechanism 248, connected to the operating rotor 224 by clamping. After the auxiliary thread has been separated from the supply 122, the winding device 150 and the handling device 124 together form an attachment unit which can first connect the stored auxiliary thread to the winding unit 101, then thread it into the thread guide elements of the spinning station and finally on one of a drafting system (not shown). supplied roving.

The second working element 244 is a flexible element, for example a brush for brushing the upward-facing surface of the ring 106. This element is used to move the rotor 108 on the spinning ring 106, as described in more detail later.

After a length of auxiliary thread has been picked up from the suction tube 134 at the delivery point 128 and has been connected to the operating rotor 224, the carriage 186 is moved upward by actuating the motor 204 in order to move the device 150 into a predetermined position in relation to the topmost windings W (FIG 4) to bring the cop. For this purpose, the highest position of the ring bench 104 is sensed and stored while the robot is moving, so that the controller 208 is able to bring the slide 186 immediately to the appropriate working height (along the threaded spindle 196) after leaving the delivery point 128 . When the carriage 186 has reached the working height, the unit 202 is actuated to move the device 150 against the spindle 102 into the first working position (FIG. 4).

In this first working position, the clamping plane formed by the clamping head 246 and the operating rotor 224 lies above the uppermost windings W of the cop at a predetermined distance (not shown). In Fig. 4 it is assumed that the cop is almost finished, so that the uppermost windings W are in this case close to the upper end E of the sleeve 112. However, a thread break can already occur in the first phase of the bobbin formation, so that the first working position would then lie much further down compared to the spindle 102 and sleeve 112. In the event of a thread break during a doffing process, it may even happen that the bobbin formation in the corresponding spinning position does not begin at all, so that the auxiliary thread has to be connected to the "bare" sleeve. The correct first job can still be determined in relation to the uppermost position of the ring bench 104 during its traversing movement.

As can be seen from FIG. 10, the operating runner 224 is in its ready position during this infeed movement held so that the access opening 240 for receiving the spindle 102 and sleeve 112 is present. The mouth part 136 is brought into a corresponding work station, so that the mouth M (FIG. 4) lies below the clamping plane with a distance to be described. The auxiliary thread F extends between the mouth M and the clamping head 246 with an inclination corresponding to the vertical distance between the mouth M and the clamping plane (solid line in FIG. 4).

The motor 234 (FIG. 3) is now actuated in order to rotate the operating rotor 224 in its career 226 (FIG. 3) clockwise according to FIG. 1 about the axis P. This rotation initially shortens the distance between the mouth M and the clamping head 246, the "unnecessary" length of the thread F being absorbed by the suction in the tube 134. By further rotations of the operating rotor 224 with the clamping head 246, the thread F is pulled out of the suction pipe 134 again and placed on the sleeve 112 or the outer turns of the cop 116 (FIG. 6). The first turn of the thread F runs down the spiral around the sleeve 112 and cop 116 until the thread F lies in a horizontal plane including the mouth M (dashed line in FIG. 4). By further rotation of the operating rotor 224, a few connecting turns V (FIG. 4) are formed in this plane.

The above-mentioned distance between the mouth M and the clamping plane is chosen such that, if a cop 116 is present at all, these first connecting windings V lie below the uppermost winding W of the cop. The work site of the mouth M is therefore below the uppermost position of the ring bench 104 during its traversing movement, so that this work site must be kept outside the movement area of the ring bench 104 (see FIG. 5).

It will be apparent that the first connecting turns V are formed by rotating the operating rotor 224 both with respect to the spindle 102 or sleeve 112 and with respect to the C-shaped part 222. The thread F is pulled directly from the suction pipe 134 by the rotation of the operating rotor 224. After the formation of only a few connecting turns V, the rope effect between the thread F and the cop 116 becomes so great that a weaker thread F would break between the clamping head 246 and the first connecting turns V when the spindle 102 was stationary. In order to avoid this and still be able to form further turns V, the spindle 102 is released from its drive (not shown) during the winding process, so that it can currently be freely rotated.

In order to achieve a secure connection between the auxiliary thread piece and the sleeve 112 or the cop 116, it is advisable to overcome the first spiral turns. This requires a slight lifting of the winding device 150 in the direction of the upper end E of the sleeve 112 in a second working position (FIG. 7). This binding gives the auxiliary thread end additional hold, especially on a bare, smooth sleeve.

The mouth part 136 is also moved upwards in order to wind further binding turns B (FIG. 7) on the sleeve 112, these binding turns B securely binding the aforementioned piece of thread to the sleeve 112. The binding coils B also serve another purpose, but this only becomes clear when a later phase of the process is explained and is therefore only dealt with later in this description. In order to form these last binding turns B, the spindle 102 must still be able to rotate freely and the thread F must remain intact between the bindings formed on the sleeve and the clamping head 246. But after this second phase has been completed, the spindle 102 is braked by a suitable means (not shown) while the operator runner 224 continues to run. The auxiliary thread piece F is thereby pulled out of the clamping head 246 and forms a free end FA (FIG. 8). As an alternative to this, the auxiliary thread end FA can be released from the clamping pin in a pneumatic clamping device in that it is released. The end of the auxiliary thread can in principle be cut off by any relative movement between the clamping device 242 and the sleeve 112 or by staggering in time when the sleeve 112 or the operating rotor 224 is braked. A solution deviating from the example shown above is to first stop the operating rotor 224 and thus the clamping device 242, so that after the auxiliary thread end FA is torn off, further turns of the suction tube 136 are attached to the sleeve 112 when the sleeve 112 is turned further, and the rest Piece of the auxiliary thread end FA is fully integrated in the package. The auxiliary thread end FA can also be torn out of the clamping device 242 by a jerky linear movement of the winding device.

The auxiliary thread piece F can also be separated after threading into thread guide elements, which is not shown in detail here. It is thus ensured that the auxiliary thread end FA held by the clamping device 242 prevents the yarn carrier from rotating further and thus from unwinding from the yarn carrier.

The operator runner 224 is now brought back into its ready position, so that the access opening 240 is restored (FIG. 8). The application of compressed air to the unit 202 (FIG. 2) is now released, so that the winding device 150 is withdrawn (FIG. 9). It Now apply the attachment unit for threading the auxiliary thread F with the ring traveler 108 (FIG. 10). For the time being, the various steps of this preparatory be described before the reasons for these steps are explained in more detail. During the threading, the angular position of the spindle is held by braking.

As a first step after the device 150 has been withdrawn, the mouth part 136 is moved from its second working position (FIGS. 7 and 9, solid lines) to a third working position on the other side of the spindle 102 and the winding device (dashed lines in Fig. 9). A slide 260 carried by the slide 186 is now moved from a retracted position (FIGS. 4 and 7) to an advanced position (FIGS. 9 and 11 to 14) by a suitable actuating means (for example by a pneumatic piston and cylinder unit, Not shown). A V-shaped guide part 262 (FIGS. 4, 7 and 13) engages in the free thread length between the sleeve 112 and the mouth part 136. The slider 260 is advanced so far that the thread length mentioned is deflected by the guide part 262 and finally in one predetermined position is held. This position is determined by a suitable end stop (not shown) for the slide 260.

The mouth part 136 is now moved up and then brought back onto the first side of the spindle 102 and the winding device 150 (FIG. 11). The mouth M is moved downwards so that the thread F runs below the winding device 150 and between the mouth M and the edge of a guide surface FF (FIG. 9) on the uppermost surface of the slide 260 a predetermined inclination upwards (in FIG 11 not visible). The slider 260 is provided with a constriction 261 (FIG. 9) in order to guide the thread on the surface FF. The position of the mouth part 136 is now selected so far away from the ring bench 104 that the thread F lies outside the movement space of the ring 106 (Fig. 11). The winding device 150 is now moved back into its second working position (FIG. 12), after which the threading preparation phase is completed.

The reasons for this sequence will be evident from FIGS. 9, 11 and 12 together with FIG. 10: FIG. 10 shows schematically the cop 116, the yarn G during normal spinning and the runner 108, the direction of rotation of the cop being determined by the Arrow R is indicated. This direction of rotation is also indicated by an arrow on the spindle 102 in FIG. 14, although the spindle may not actually rotate during the preparation phase. In order to restore the operating conditions indicated in FIG. 15, certain geometric relationships must prevail when threading the auxiliary thread F with the rotor 108.

If one looks at the relevant spinning position in the direction of arrow L (FIGS. 9, 11 and 12), the thread length to be threaded must extend from the left to the right from the slide 260 to the mouth part 136. For this, this thread length must have a slight inclination from above on the slider 260 downward at the mouth 136. This inclination α is indicated in FIG. 13 (in this figure a part of the cop 116 has been "cut away" to show the guide head of the slide 260). Furthermore, the runner 108 has to be pushed onto the thread F by moving along the spinning ring 106 in a clockwise direction according to FIG. 11. The auxiliary thread length extending between the runner 108 and the mouth part 136 can then be pulled upwards in order to correspond to the position of the thread length G (FIG. 10).

The conditions described above depend on the direction of rotation of the spindle 102, which in turn depends on the yarn rotation (S or Z rotation). The relationships described are adapted for a yarn with S twist, what corresponds to the products of most spinning mills. When producing yarn with a Z twist, the slider 260 would have to be laid on the other side of the spindle 102 (again in the direction of the arrow L, viewed in FIGS. 4, 6 and 7) and the thread length to be threaded would have to be from right to left extend from the slider 260 to the mouth part 136.

In order to produce the conditions already described, the device 150 must in any case be moved into its retracted position, at least in order to allow the laying of the mouth part 136 after the thread F has been brought into contact with the guide part 262 of the slide 260. For the winding it does not matter whether the mouth part 136 is placed to the left or to the right (viewed in the direction of the arrow L) relative to the winding device 150. The position of the clamping point 242 in the circumferential direction of the operating rotor 224 also does not play a major role in this regard. However, the clamping point 242 can preferably be brought as close as possible to the separating means (not shown) for separating the thread between the clamping point and the delivery mechanism 126 (FIG. 1), in order to avoid a long thread end depending on the clamping point.

After the preparation phase is completed (FIG. 12), the switching means 214 is switched to the controller 210 (FIG. 2) and the motor 204 is activated to move the slide 186 down the threaded spindle 196 until the sensor 206 detects the Ringbank 104 "finds". The mouth part 136 is moved accordingly, so that the already prepared conditions are maintained. The sensor 206 scans contactlessly for the ring bank 104.

After the sensor 206 has "found" the ring bank 104, the sensor delivers a signal to the controller 210 to which the Keep the motor in operation continuously so that the carriage 186, together with the winding device 150, follows the movements of the ring bench 104. The clamping plane of the operating rotor 224 is obtained at a predetermined distance S (FIG. 13) above the upward surface of the ring bench 104. In this third working position of the winding device (on the ring bench 104), the second working element (the brush) 244 is held in contact with the upward-facing surface of the ring 106.

The vertical movements of the ring bench 104 are followed without contact as previously indicated and therefore without loading the ring bench drive (not shown). The positioning of the winding device 150 in the X direction (FIG. 1) to ensure that the brush 244 is in contact with the spinning ring 106 is, however, effected by a feeler roller 264 mounted on the device 150. This touch does not burden the ring bench drive.

FIG. 14 shows the last movement of the threading process, the operating rotor 224 being rotated again clockwise around the axis P, thereby also moving the rotor 108 (not visible in FIG. 14) clockwise along the spinning ring 106 along the thread length between the mouth part 136 and slide 260. As can be seen from a comparison of FIGS. 13 and 14, the mouth part 136 must first be brought in the direction of the ring bank 104 into the position shown in FIG. 14 and the thread piece to be threaded must be placed close to the spinning ring 106, the inclination α ( Fig. 13) is maintained.

Before the last movement indicated in FIG. 14, it must also be ensured that the runner 108 is in a suitable position opposite the spinning ring 106 in order to be pushed by the brush 244 in the desired direction can. This is actually preferably the first step in the whole process and is even carried out before the auxiliary thread length is fetched. As previously mentioned, when the robot is patrolling, the start-up device is continuously held along its "working height" along the threaded spindle 196 by the control system shown in FIG. 3. To this end, the sensor 206 senses the upper reversal point of the ring bench movement while the robot is moving and uses it to adjust the position of the slide 186.

When a thread break is detected or after positioning at the spinning position to be operated, the device can be delivered to the relevant spindle 102 immediately (in the first working position, FIG. 4) and the carriage 186 can then be moved down to the device Dock onto the ring bench 104 (in the third working position, Fig. 13 - as already described for the threading). The operator runner can then be actuated to place the runner in a predetermined position (e.g. position X in Fig. 14) where it does not interfere with nor interfere with the preparation for threading.

The motor 204 can then be started again in order to uncouple the device from the ring bench and return it to the first working position (FIG. 4), so that the winding device 150 is pulled back into the robot to pick up the auxiliary thread from the delivery point 128 can. As already indicated by the "controller" 212 (FIG. 2), the motor 204 is controlled independently of the position of the ring bench 104 in order to bring the slide, for example, to the lower end of the spindle 196 and thereby in the vicinity of the delivery point 128. As already mentioned, the "working height" (the height of the first working position of the spindle 102 along) is stored, so that after the auxiliary thread has been taken up Attaching unit (winding device 150 and handling device 124) can be brought back to the working height immediately. The procedure already described can then be carried out.

The movement of the operating rotor 224, indicated in FIG. 14, encompasses one full revolution of this organ, so that the brush 244 runs over the thread length extending between the sleeve 112 and the slide 260. Contact between the brush 244 and the thread length F should be avoided as far as possible, since otherwise the thread run could be disturbed. The guide part 262 of the slide 260 is therefore provided with a screen piece 266 (best seen in FIGS. 9 and 11), which in the threading position (FIG. 13) lies directly above a section of the spinning ring 106 and the thread F from the brush 244 during the aforementioned threading revolution of the operator rotor 224.

As mentioned in connection with FIG. 10, the thread F (after the slide 108 has been pushed on) can be moved upwards by the handling device 124. However, the auxiliary thread F remains threaded with the rotor 108 and is pulled out of the suction pipe 134. There is also a thread length between the runner 108 and the cop 116.

The tensile force that is exerted on the auxiliary thread F, however, acts in the opposite direction to the tensile force that is exerted in normal spinning (starting from the cop 116). If the auxiliary thread F now runs in a substantially horizontal position from the runner 108 to the cop 116, the forces exerted by the auxiliary thread F on the runner 108 could under certain circumstances be sufficient to move the runner along the spinning ring 106, specifically in that position Spinning normal direction (clockwise in Fig. 14). However, since the spindle 102 is still at this time, this movement of the rotor would result in the thread turns being pulled off Kops mean what could lead to another thread break when attaching for various reasons.

To avoid this, the upper turns during winding (i.e. the binding turns B, Fig. 7) are formed above the top turns W of the cop 116. The thread length extending from the windings B to the rotor 108 thereby always has an upward slope as seen away from the rotor 108. The forces exerted by the thread lengths on both sides of the runner on these during the further threading phases only partially compensate for one another and give a resultant which lifts the runner 108 upwards against the underside of the spinning ring 106 rather than moves the runner along the spinning ring. This prevents unfavorable handling of unwound bond windings B.

It is apparent from the above description that the connection of the auxiliary thread piece F with the yarn carrier finally takes place due to the rotational movement of the one holder in the form of the winding ring 224 with the clamping device 242 around the yarn carrier 112. As a result, as described in detail above, a connection between the auxiliary thread piece F and the yarn carrier 112 is achieved at a desired point in time by the action of friction. It is obvious that this principle can also be implemented in other ways. The essence of the invention therefore lies in a method for applying an auxiliary thread F to a yarn carrier 112 of a spinning machine located at the spinning position, the method being characterized in that an auxiliary thread piece F clamped on two sides in holders 136, 242 is applied to the yarn carrier 112 and is looped around the yarn carrier 112 with one of the holders until the auxiliary thread piece is connected to the yarn carrier by friction.

According to the current opinion, this principle can best be achieved when the yarn carrier 112 stands still during the wrap-around movement, and is preferably also freely rotatable.

As can be seen from the basic illustration of the winding process, the position of the winding on the thread carrier is arbitrary. After doffing can be wrapped on the empty tube below; after a thread break can be wound on the package; or even a thread reserve can be formed outside of the package area.

However, it is recognized according to the invention that the standstill of the yarn carrier and / or its free rotational mobility are not necessarily basic requirements for realizing the method according to the invention.

For example, it is entirely possible to drive the yarn carrier 112 separately, during or after the wrap-around movement, in order to achieve a gentle but secure connection between the auxiliary thread piece and the yarn carrier. One can imagine this, for example, in that the yarn carrier 112 is first uncoupled from the normal drive of the spinning station and then driven by a separate rotary drive, for example by a drive which is located on the operating device 100 and the sleeve 112 or the Spindle 102 drives for example with a rubber wheel by friction to a rotary movement.

It could also be imagined that the winding ring 224 first produces a few loose revolutions around the yarn carrier 112 and then the sleeve 112 and therefore the yarn carrier for a separate rotational movement is driven to tighten these loose windings and therefore to establish the required frictional connection between the auxiliary thread piece F and the yarn carrier 112. This could be done, for example, by having the separate drive for the yarn carrier 112 drive the yarn carrier 112 at the same rotational speed as that of the winding ring 224 and then changing the rotational speed of the yarn carrier 112 relative to the winding ring 224, preferably accelerating it, in order to tighten the wraps that have taken place and at the right moment pull the end of the auxiliary thread piece F out of the clamping device 242 or release it by loosening the clamping device 242. Thereafter, the separate drive could be released from the yarn carrier 112 and the process, as previously described in detail, continued until the spinning station produces again.

Claims (36)

1. A method for winding up an auxiliary yarn piece (F) on a yarn bobbin (116) disposed on a spinning position of a spinning machine, which bobbin is formed on a yarn carrier or a tube (112) forming a yarn carrier, characterized in that an auxiliary yarn piece (F) which is clamped on two sides in guided fixing devices (242, 134) is placed on the yarn carrier and is wrapped around the yarn carrier (112) with the help of one of the fixing devices (112) until the auxiliary yarn piece (F) is connected to the yarn carrier (112) by the rubbing action.
2. A method as claimed in claim 1, characterized in that during the winding of an auxiliary yarn piece (F) on the yarn carrier (112) said carrier is idle, but rotatable, at first and is driven to a rotary movement by entrainment through the auxiliary yarn piece (F) as a result of the rubbing action.
3. A method as claimed in claim 2, characterized in that the yarn carrier (112) which is made to rotate by the entrainment winds up a further part of the auxiliary yarn (F) against a retaining effect caused by the second fixing device (134) (first connecting windings V).
4. A method as claimed in one of the preceding claims, characterized in that the auxiliary yarn piece (F) is tensioned between a nip position (242) and a resiliently acting retaining apparatus (134), whereby a part of the auxiliary yarn piece is stored in the retaining apparatus (134) and is thereafter removed therefrom by the entrained yarn carrier (112) with the exception of a residual part remaining in the retaining apparatus (134) and is wound up on the yarn carrier (112).
5. A method as claimed in claim 4, characterized in that in the retaining apparatus (134) a suction action is exercised which is directed inwardly from an orifice portion (136).
6. A method as claimed in claim 1, characterized in that the position of the first connecting windings (V) is placed at least in the vicinity of the upper limit of the stroke of the ring rail.
7. A method as claimed in claim 1, characterized in that a position of the first connecting windings (V) is selected outside of the yarn winding range in order to form a yarn reserve on the yarn carrier (112).
8. A method as claimed in claim 4, characterized in that after the end of the winding process the auxiliary yarn piece (F) is separated by a relative movement between the nip position (242) and the yarn carrier (112) from the nip position (242).
9. A method as claimed in claim 4, characterized in that the nip position (242) for separating the auxiliary yarn piece (F) is opened by activating a controllable actuating mechanism (248).
10. A method as claimed in claim 8, characterized in that the auxiliary yarn piece (F) is torn off from the nip position (242) by tensile forces.
11. A method as claimed in claim 10, characterized in that the separation of the auxiliary yarn piece (F) leading from the yarn carrier (112) to the nip position (242) is made by temporally graduated stopping of nip position (242) and yarn carrier (112), so that a jerking stress is exercised on the auxiliary yarn piece (F).
12. A method as claimed in claim 8, characterized in that the auxiliary yarn piece (F) is separated in the zone of the spinning position from the nip position (242) after an automatic threading in thread guide elements (108).
13. A method as claimed in claim 1, characterized in that a yarn quality with a coarse surface which departs from the spun yarn material is used as auxiliary yarn piece (F), which guarantees a continuous cleaning of the thread guide elements (108).
14. A method as claimed in claim 1, characterized in that the auxiliary yarn piece (F) is selected with such a maximum length so that it is securely and completely removed by a later cleaning cut.
15. A method, in particular as claimed in one of the preceding claims, in a spinning machine which is provided with a traversing ring rail (104), characterized in that the uppermost position of the ring rail (104) is scanned at the time of producing the first connecting windings (V) and said connecting windings are produced in the zone of the momentary uppermost windings (W) on the bobbin (116) or the tube (112).
16. A method as claimed in claim 15, characterized in that the first connecting windings (V) are produced below the momentary uppermost windings (W).
17. A method as claimed in claim 15 or 16, characterized in that binding windings (B) are produced above the momentary uppermost windings (W).
18. A method as claimed in claim 17, characterized in that the auxiliary yarn piece (F) is guided from the binding windings (B) above the uppermost windings (W) to a traveller (108) carried by the ring rail and is threaded in the traveller.
19. A method as claimed in claim 1 or 2, characterized in that the yarn carrier (112) is driven to a rotary movement, which may optionally differ with respect to the fixing device (242), during or after the twisting with the auxiliary yarn piece (F) in order to pull tight the momentary loose wrap of the auxiliary yarn piece on the yarn carrier (112).
20. An operating device for carrying out tasks in a yarn processing position comprising a spindle (102), with means (222, 224) for carrying out interventions in the area of the yarn carrier (112) placed on the spindle (102) or of the bobbin (116) formed thereon or in the area of the spinning ring (106), whereby said means (222, 224) are movable towards the spindle and away from it into the starting position, e.g. for winding up an auxiliary yarn piece (F) on a yarn carrier (112) being situated in a spinning position of a spinning machine or on a bobbin (116) being disposed thereon, in particular for carrying out the method as claimed in claim 1 or for moving a traveller (108), for example, around a spinning ring encompassing the spindle (102), characterized in that the means (222, 224) form a guiding means (226) about the spindle axis and are provided with a drive (224) for moving at least one working element along said guiding means, whereby the working element (brush 244) can move a traveller, for example, on a spinning ring (106) or the working element is provided during the winding of an auxiliary yarn piece (F), for example, with a first fixing device (nip position 242) for fixing a yarn end of the auxiliary yarn piece (F) and a second fixing device (134) is provided and that the auxiliary yarn piece (F) is clamped between the two fixing devices (134, 242) in such way that the auxiliary yarn piece (F) can be wrapped around the yarn carrier (112) with the help of the first fixing device until the auxiliary yarn piece (F) is connected with the yarn carrier by rubbing action.
21. An operating device as claimed in claim 20, characterized in that the means (222) comprises a carrier portion (220) for forming a guiding means (226) which can be advanced towards the spindle (102) or a cops (116) carried by the spindle by movement (X) in the direction transversal to the spindle axis.
22. An operating device as claimed in claim 2, characterized in that the guiding means (226) comprises a substantially annular track which is provided with an opening (238) in order to allow the advancement of the guiding means substantially concentrically to the spindle axis.
23. An operating device as claimed in claim 22, characterized in that both the track (226) as well as an operating traveller (224) guided thereby are C-shaped.
24. An operating device as claimed in claim 23, characterized in that means are provided to determine the position of the operating traveller (224) in the circumferential direction with respect to its track (226), so that on advancing the device to the spindle (102) the openings (236, 238) of the two C-shaped parts (224, 226) are mutually aligned.
25. An operating device as claimed in one of the claims 23 or 24, characterized in that the operating traveller (224) is arranged as a start winding ring and that the working element (242) carried by it is a nip position (242) for entraining a yarn (F).
26. An operating device as claimed in one of the claims 23 or 24, characterized in that the working element (244) carried by the operating traveller (224) is a brush (244) which is used to bring the traveller on the spinning ring (106) into a position which is suitable for threading an auxiliary yarn piece (F).
27. An operating device as claimed in one of the claims 21 to 26, characterized in that the operating traveller (224) is connected with a carrier segment (220) and that the carrier segment (220) comprises a drive means (234, 232, 230, 228) for rotating the operating traveller (224) about the axis of the track (226) which is approximately in alignment with the spindle axis on advancement to the spindle (102).
28. An operating device as claimed in claim 24 and claim 27, characterized in that the drive means comprises a toothed ring (228) and a transmission means (230) which transmits the rotation of the toothed ring (228) onto the operating traveller (224).
29. An operating device as claimed in claim 28, characterized in that the transmission means comprises a plurality of transmission elements (230), so that at least one element (230) still remains in connection with the toothed ring (228) and the operating traveller (244) when an element is disposed opposite of the opening (236) of the C-shaped operating traveller (224) and this element can no longer transmit the rotation onto the operating traveller (224) as a result of this.
30. An operating device as claimed in one of the claims 23 to 29, characterized in that the carrier segment (220) is provided with controllable actuating mechanism (248) (e.g. a rocker lever) in order to actuate a working element (242) carried by the operating traveller (224) (e.g. to open and close a clamping apparatus) when the operating traveller (224) is disposed in a predetermined position with respect to the carrier segment (220).
31. An operating device as claimed in one of the preceding claims 20 to 30, whereby the spindle (102) is allocated to a traversing ring rail (104), characterized by means for scanning the uppermost position of the ring rail (104) at the time of producing the winding-on of the auxiliary yarn piece (F) on the yarn carrier (112) and by means for producing connecting or binding windings (V, B) in the zone of the momentary uppermost windings (W) on the tube.
32. An apparatus as claimed in claim 31, characterized in that means for scanning the momentary position of the ring rail (104) are present and means (260) for guiding the yarn from the said connecting or binding windings (V, B) to the spinning ring (106) carried by the ring rail (104).
33. An operating device or operating robot as claimed in claim 25 with auxiliary yarn feeder rolls (122, 126), characterized in that a retaining apparatus (134) for receiving the auxiliary yarn piece (F) supplied by the auxiliary yarn feeder rolls is provided, whereby the auxiliary yarn piece can be nipped between the retaining apparatus (134) and the auxiliary yarn feeder rolls at a nip position (242) of the start winding ring (224) and that the start winding ring (224) is movable into a position which is concentric towards the yarn carrier (112) and is held rotatably about an axis which is parallel to the rotational axis of the yarn carrier (112) and is connected to a controllable rotary drive.
34. An operating device as claimed in claim 33, characterized in that the retaining apparatus (134) for the auxiliary yarn piece (F) is movable independently from the start winding ring (224).
35. An operating device as claimed in one of the claims 33 or 34, characterized in that an open start winding ring is to be provided which is provided with a feed-through opening (240) which is larger than the diameter of the yarn carrier (112).
36. An operating device as claimed in one of the claims 33 or 34, characterized in that the start winding ring is arranged as a closed ring and is guidable from above via the yarn carrier into a position which is concentric thereto.

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