EP0831050A1 - Method and device for positioning empty tubes on a tube conveyor - Google Patents

Abstract

To position empty bobbin sleeves at a sleeve feed unit opposite a grip, which is on a mobile maintenance unit which travels along the line of spinning stations, the sleeve is given a tilting movement while its travel is braked, to direct it towards the sleeve transport system. Also claimed is an apparatus with a limit stop (4) with a pressure unit (40) to tilt the bobbin sleeve towards the sleeve transport system (12).

Description

The present invention relates to a method for positioning empty tubes on a sleeve conveyor opposite a gripping device according to the Preamble of claim 1 and an apparatus for performing this method.

According to a known method (DE 195 29 566 A1) a stop in the Transport path of the empty tube to be stopped moves, so that the empty tube on this stop runs up and is therefore stopped, even when the sleeve conveyor still running. To the empty tube exactly opposite the job, for example a winding or spinning station to which the empty tube is to be fed, to align, a second stop is fed towards the trailing end of the Empty sleeve moves, by conical design of the stops or by in accordance with the directions of the stops inclined relative to the empty sleeve the empty sleeve is clamped between the two stops and thereby the occupies the desired defined position relative to the job. However, it has shown that the empty tube due to its inertia and possibly unbalance and unequal Mass distribution, for example in the case of conical sleeves, has a tendency to become by the impact on the stop on the sleeve conveyor and fall sideways from it before going through the second stop in it Position can be fixed so that gripping and feeding to the spinning station is thwarted. This can lead to machine malfunctions.

The object of the present invention is therefore a method and a device to create the make sure that the empty sleeve also during braking and stopping does not leave the sleeve conveyor.

This object is achieved by the features of claim 1. By generating a tilting moment in the direction of the sleeve conveyor, the Tendency of the suddenly braked empty sleeve counteracted, so that this erection and lateral breakout of the empty sleeve is prevented. In this way is achieved that the empty tube in front of the work, winding or Spinning station arrives, actually remains in the desired stop position and can be fed to the appropriate location. Unpleasant wasted time for requesting and feeding a new empty tube are thus effectively avoided. In addition, there will be malfunctions otherwise caused by the sleeve conveyor falling empty tubes could be generated prevented; that too There is no need to pick up and clean up fallen empty tubes.

The method according to the invention is expediently developed according to claim 2, since this ensures that the empty tube during the total duration during which there is a risk that the empty tube due to unintentional, uncontrolled jumping movements leave the sleeve conveyor, secured by generating a tilting moment on the sleeve conveyor becomes.

It has proven to be advantageous if the method according to the invention is in accordance with Claim 3 is further developed because of the reduced impact speed the empty stop the defined stop position can be reached more safely.

To ensure that the empty tube actually does its defined stop position achieved with a reduced delivery speed, it is advisable if the empty tube regardless of the braking of the sleeve conveyor on the reduced speed of the sleeve conveyor is brought. this will according to the invention in a safe manner by developing the method according to claim 4 reached. The tilting moment can advantageously be in the direction of the sleeve conveying device according to claim 5 a second time during the shutdown the empty tube when it reaches its desired defined stop position has to be generated.

In principle, it does not matter how the tilting moment is generated it has proven sufficient in the interest of a simple constructive design proved if this tilting moment and the contact pressure caused thereby the empty tube against the tube conveyor or transport device according to claim 6 at the leading end of the empty sleeve to be braked and stopped is produced.

Another advantageous embodiment of the method according to the invention is by characterized the features of claim 7.

According to the invention, a device is used to carry out the described method with the features reproduced in claim 8. The sleeve pressing device presses due to the generated overturning moment Empty sleeve so against the sleeve transport device that the empty sleeve this Sleeve conveyor can not leave.

The sleeve pressing device can be designed differently, but is the Subject of the invention advantageously in the interest of saving material and space trained according to claim 9.

According to a particularly simple and therefore particularly expedient embodiment is the device according to the invention according to the claims 10 and 11 are formed.

According to the invention, the stop for the empty sleeve can be adjusted according to claim 12 be a precise stop position for the despite possible manufacturing tolerances Ensure empty sleeve.

About the impact and thus the tendency of the empty tube, the tube conveyor the subject of the invention is expedient to leave, to belittle further developed according to claim 13, wherein by designing the invention Device according to claim 14 a structurally simple solution is achieved.

Is per direction of movement of the sleeve conveyor in relation to the maintenance device One stop each is provided so that the empty sleeve can be pre-stopped achieve by designing the subject matter of the invention according to claim 15, whereby an increase in the positioning accuracy of the empty sleeve is achieved lets without affecting the functional safety of the device. Here gives a design of the device according to claim 16 a structurally simple Solution.

It is provided that the empty sleeves the maintenance device with the stops each according to their order, once by one and sometimes by the other Reach side, so in a further advantageous embodiment of the invention Device should be provided that the two known stops according to Claim 17 are formed. In this way it is achieved that independently from the feed direction of the empty tubes in the same way and with the same Means a pressing effect with respect to the empty tube supplied by generation a torque or tilting moment is reached.

In addition or instead of the formation of the stop surface for the accumulating This sleeve pressing device can also be an empty sleeve as a sleeve pressing device according to claim 18 to be able to act on the empty sleeve. There is one Formation of the device according to the invention according to claim 19 useful, because In this way, there is favorable space.

So that the time for reducing the transport speed of the sleeve conveyor does not need to be calculated, but certainly on the The device can adjust the correct position of the empty sleeve to be braked according to the invention preferably according to claim 20.

Each of the holders is preferably assigned a feeler device, which is expedient according to claim 22 as a piezoelectric switching element is trained.

The subject of the invention is simple to use and in training and effective in its effect. With a small space and material requirement is the The device according to the invention is also safe in its work. Because of their space-saving Training is without problems at any time in existing devices can be retrofitted.

Fig. 1

in der Vorderansicht in schematischer Darstellung einen Teil einer Hülsenfördervorrichtung sowie eine erfindungsgemäß ausgebildete Hülsenandrückvorrichtung;

Fig. 2

ebenfalls in der Vorderansicht in schematischer Darstellung eine Abwandlung der in Fig. 1 gezeigten Vorrichtung für in umgekehrter Transportrichtung der Wartungsvorrichtung zugeführte Leerhülsen;

Fig. 3

die in den Fig. 1 und 2 gezeigte Vorrichtung in schematischer Seitenansicht;

Fig. 4

eine Abwandlung der erfindungsgemäßen Vorrichtung in der Vorderansicht mit zwei Anschlägen;

Fig. 5

eine weitere Abwandlung der Vorrichtung gemäß der Erfindung mit zwei Anschlägen, die gemeinsam die Hülsenandrückvorrichtung bilden;

Fig. 6

die erfindungsgemäßen Winkelverhältnisse im Schema zwischen dem Anschlag, der voreilenden Stirnseite der Leerhülse und der Hülsenfördervorrichtung am Beispiel einer zylindrischen Leerhülse; und

Fig. 7a - e

eine weitere Ausführung der Erfindung.

Exemplary embodiments and further details are explained in more detail below with the aid of drawings. Show it:

Fig. 1

in the front view in a schematic representation of part of a sleeve conveying device and a sleeve pressing device designed according to the invention;

Fig. 2

likewise in the front view in a schematic representation a modification of the device shown in FIG. 1 for empty sleeves fed to the maintenance device in the reverse transport direction;

Fig. 3

the device shown in Figures 1 and 2 in a schematic side view.

Fig. 4

a modification of the device according to the invention in front view with two stops;

Fig. 5

a further modification of the device according to the invention with two stops, which together form the sleeve pressing device;

Fig. 6

the angular relationships according to the invention in the diagram between the stop, the leading end face of the empty sleeve and the sleeve conveying device using the example of a cylindrical empty sleeve; and

7a-e

a further embodiment of the invention.

Fig. 1 shows only the elements necessary for understanding the invention a textile machine, here a spinning machine 1, the work or spinning positions 10 empty tubes 2 are each fed in a precisely defined position. Each Work station 10 has two coil arms 11 and 110, between which the delivered Empty sleeve 2 is to be positioned (see dashed line), so that afterwards the spun thread can be wound on it. For the Transport of the empty tubes 2 along a variety of similar work or spinning stations 10 of the spinning machine 1 serves a sleeve conveyor device, which according to FIG. 1 two continuous endless belts or bands arranged parallel to each other 12 and 13 (see also Fig. 3), on the upper runs 120 and 130 the Empty tubes 2 rest, while the lower runs 121 and 131 the two returning ones Trums of endless straps or bands 12 and 13 are.

The two upper runs 120 and 130 are in a guide 140 and the two lower runs 121 and 131 guided and supported in a guide 141. The guides 140 and 141, with the help of holders 14 from the machine frame 15 Spinning machine 1 worn.

To stop the empty tube 2 in a defined manner on the work or Spinning station 10 is used for a maintenance device 3 which runs along the spinning stations 10 Spinning machine 1 is movable. Depending on your wishes, that the maintenance device 3 only one long side or both long sides operated the spinning machine 1.

The maintenance device 3 carries a suitable gripping device 30, with the help of which the empty tube 2, which is shut down relative to the spinning station 10, is received in the usual way and transported between the two coil arms 11 and 110 and to this is transferred (see dashed line in Fig. 1).

The defined stopping of the empty tube fed through the two bands 12 and 13 2 takes place with the aid of a stop carried by the maintenance device 3 4, from a swung-up rest position (see dashed illustration in Fig. 3) can be pivoted down into its working position in which it is in the transport path of the empty sleeve 2 fed on the belts 12 and 13. For this purpose, the stop 4 is carried by means of a holder 5. Of the Holder 5 in turn is parallel to the transport direction of the empty sleeve 2 adjustable hinge pin 50 on a part 310 of the frame 31 of the maintenance device 3 stored. The holder 5 is at a distance from this hinge pin 50 with a rod 51 in connection, which in turn the extension of a piston 52nd a pneumatic or hydraulic cylinder 53 forms. The cylinder 53 is in known manner using a conventional and therefore not shown control device controlled to the stop 4 when necessary in the transport path of the empty tube 2nd to swing in or out of this transport route. Instead of Cylinder 53 can also use an engine.

The stop 4 has a stop surface 40 which is opposite the sleeve conveying device 12, 13, seen in the sleeve feed direction (arrow f), an acute angle α includes (reversed in Fig. 2). In this way, the stop surface 40 a sleeve pressing device, with the help of the empty sleeve 2 against the tapes 12 and 13 of the sleeve conveyor is pressed. Reaches the empty pod 2 with its upper leading edge 20, the stop surface 40, so this forms Edge 20 is a fulcrum for the sleeve conveyor, which is still driven (Tapes 12 and 13) supplied empty tube 2. In an effort to deal with their leading end face 21 (Fig. 1) to apply to the stop surface 40, the Empty sleeve 2 reinforced with its underside 22 resting on the tapes 12 and 13 pressed against these bands 12 and 13. It becomes a torque or tilting moment generated in the empty sleeve 2 stopped by the stop surface 40, the prevents the trailing end 23 of the empty tube 2 from resting on the tapes 12 and 13 stands up and moves sideways. This danger is usually special large if in the case of a conical empty sleeve 2 the trailing end 23 of the Empty sleeve 2 has the larger diameter D.

If a conical empty sleeve 2 is to be stopped, it is due to the difference in diameter between the smaller diameter d at the leading end 24 the empty tube 2 and the larger diameter D at the trailing end 23 Center line l of the empty sleeve 2 inclined so that the stop surface 40 facing End face 21 of the empty sleeve 2 is inclined and a point with the stop surface 40 Includes angle β (reversed in Fig. 2).

As shown in Fig. 3, 1 spools can usually be different on spinning machines Form. For example, it is possible to choose cylindrical sleeves 25 (see Fig. 6 or solid line in Fig. 3) or but conical sleeves 26 (see Fig. 2 or dashed line in Fig. 3), possibly even with different conicity. So as not to stop 4 with its stop surface 40 when changing the sleeves used 2, 25 and 26 have to be readjusted every time to make an acute angle β between the stop surface 40 and the leading end face 21 of the empty sleeve 2 (or 25 or 26) to generate, it is provided that the angle α between the Stop surface 40 and the transport direction of the sleeve conveyor (belts 12 and 13) is generally smaller than the angle γ oriented in the same direction between the leading end face 21 of the empty sleeve 2, 25 or 26 and the bands 12 and 13 of the sleeve conveyor (see Figs. 2 and 6). In this way remains in any case, d. H. regardless of the sleeve shape used (cylindrical or conical), between the leading end face 21 of the empty sleeve 2 (or 25 or 26) and the stop surface 40 an acute angle β, d. that is, it will a torque or tilting moment exerted against the empty sleeve 2 (or 25 or 26) presses the belts 12 and 13 of the sleeve conveyor, thereby ensuring is that the empty tube 2, 25 or 26 despite the abruptly starting shutdown process remains securely on the tapes 12 and 13.

The same applies to cylindrical sleeves 25, as shown in FIG. 6. Again is the angle α between the stop surface 40 and the belts 12 and 13 of the sleeve conveyor smaller than the angle γ between the leading end face 21 the empty sleeve 25 to be stopped and the sleeve conveying device 12, 13, so that here too the peak required to generate a torque or tilting moment Angle β is present.

As long as the bands 12 and 13 move in the direction of arrow f, so long also the empty sleeve 2, 25 or 26 with its edge 20 against the stop surface 40 of the stop 4 pressed. Because of this power, because of the presence of the acute angle β between the stop surface 40 and the leading end face 21 of the empty sleeve 2, 25 or 26 generates the torque or tilting moment mentioned, this causes the empty tube 2, 25 or 26 to securely on the tapes 12 and 13 of the Sleeve conveyor remains. On the other hand, it is often desirable that the Empty sleeve 2, 25 or 26 for the takeover by the gripping device 30 completely quiet lies. This is achieved in that the belts 12 and 13 of the belt conveyor be stopped before the empty tube 2, 25 or 26 by the gripping device 30 is included.

To stop the belts 12 and 13 after the empty sleeve 2, 25 or 26 has hit the stop 4, the empty tube 2, 25 or 26 is monitored. This can be done directly with the aid of a monitoring device 6 (see FIG. 1) or done indirectly. For example, a light barrier is provided, which the front end face 21 or the trailing end face of the empty sleeve 2, 25 or 26 monitors and triggers a signal when the empty tube 2, 25 or 26 the desired Has reached position. This signal then does not cause the above mentioned shown control device of the spinning machine 1, the stopping of the sleeve conveyor 12, 13. After a preset time within which the tapes 12 and 13 have come to a standstill with certainty, then the drive (not shown) of the gripping device 30 activated, which is now the stopped and lying still Empty sleeve 2, 25 or 26 picks up.

According to the embodiment shown, the holder 5 is flexible and For this purpose, for example, consists of spring plate. Stationary on the maintenance facility 3 in FIG. 1 is a monitoring device designed as a touch device 6 for direct monitoring of the position of the empty tube 2, 25 or 26 arranged, which scans the position of the holder 5 and at each by the emergence the empty sleeve 2, 25 or 26 caused deviation of the holder 5 or his Stop 4, d. H. if its lower end, which forms a switch flag, in the Scanning area of the monitoring device 6 arrives, triggers a signal to the sleeve conveyor 12, 13 to stop or at least to the work of the gripping device 30 initiate.

An elastic design of the holder 5 also has the advantage that the empty sleeve 2, 25 or 26 is slowed down in a progressive manner, reducing the impact of the Empty sleeve 2, 25 or 26 mitigates and thus further to a quiet shutdown of the Empty sleeve 2, 25 or 26 and thus also contributes to the fact that the empty sleeve 2, 25 or 26 remains securely on the belts 12 and 13 of the sleeve conveyor. The attack 4 is in this way due to the elastic bracket by means of the elastic Holder 5 designed as a damping device.

With an elastic design of the holder 5, the torque or tilting moment triggered when the braking process begins with respect to the empty sleeve 2, 25 or 26, and continues to be produced until the belts 12 and 13 of the sleeve conveyor are stopped. If the empty sleeve 2 strikes the stop surface 40, so initially increases due to the elastic design of the holder 5 Angle β and in this way causes an increase in the torque or tilting moment. Only if due to lower acting forces, e.g. because of the waning Speed of the belts 12 and 13 or other transport or sleeve driving means having sleeve conveyor, the risk that the Empty sleeve 2, 25 or 26 unintentionally leaves the sleeve conveyor, less only then is the torque or tilting torque generated depending on the mentioned decrease in speed of the sleeve conveyor also less.

It is not necessary for the device described that when the Empty tube 2, 25 or 26 has reached its stop position, is stopped or already is brought to a lower speed beforehand. It can be for certain Cases may be appropriate, the speed of the sleeve conveyor to leave unchanged. The greater the speed of the sleeve conveyor is, the greater is the risk that the sleeves when stopping from the conveyor fall. This means that the invention is particularly helpful for quick Conveyors is.

It is also not necessary for the entire holder 5 to be elastic. For example, an elastic element, for example in Form a compression spring or two compression springs or the like., The or which allows the holder 5 to yield (within specified tolerances) or allow, so that in this way the elastically mounted holder 5 in turn Damping device that brakes and stops the accruing Empty sleeve 2 causes in a depreciated manner. The monitoring device can also be used here 6 be assigned to the holder 5 and scan its position, what in each usual way (mechanical, optical, inductive, etc.) can happen. In this case can also be dispensed with the stop 4 when the holder 5 itself the angled Has shape in relation to the face of the sleeve and the function of the stop 4 takes over.

It is also possible to form a damping device, the stop surface 40 train elastic. Due to the high stress on the stop surface 40 it is more advantageous, however, between a rigidly designed and mounted holder 5 and its stop 4 to arrange an elastic element or the stop surface 40 resiliently in the stop 4.

In a further alternative embodiment of the device described, in the Holder 5 a piezoelectric element can be integrated, which due to deformation, which causes an empty sleeve 2, 25 or 26 to run onto the stop 4, emits a corresponding control signal - either only to activate the gripping device 30 (see Fig. 1) or for braking or stopping the sleeve conveyor, before the gripping device 30 becomes active.

However, the monitoring device 6 does not necessarily need the position of the empty sleeve 2 to feel directly. Rather, the control device mentioned can be the position the empty tube 2 also due to the time of placing the empty tube 2 on the belts 12 and 13 of the sleeve conveying device depending on their Calculate the speed and the position of the maintenance device 3 mathematically and trigger the individual work steps accordingly.

As the above description shows, the device described is not on limited the training explained; rather, there are numerous modifications in the Possible scope of the invention. So individual characteristics of different Examples exchanged with each other or in other combinations Find application or be replaced by equivalents. For example it is not absolutely necessary, the tilting moment at the leading end 24 of the empty sleeve 2, 25 or 26 to produce by between the stop surface 40 of the stop 4 and the end face 21 of the empty sleeve 2, 25 or 26 an acute angle β is provided. Rather, it can also be during braking and stopping the empty sleeve 2, 25 and 26, a sleeve pressing device can be provided brought to bear on the trailing end 23 of the empty sleeve 2, 25 or 26 becomes. Such a design of the device for positioning the empty sleeve 2, 25 or 26 compared to that to be equipped with an empty sleeve 2, 25 or 26 Spinning station 10 of the spinning machine 1 is described below.

5 shows, in addition to the holder 5 with a stop surface 40 Stop 4 still a second holder 5a with a second, also a stop surface 40a provided stop 4a, the two stop surfaces 40 and 40a face each other. Depending on the movement and thus Direction of transport (arrow f or fa) of the sleeve conveyor (belts 12 and 13) one time the stop 4 and the other time the stop 4a is used, while the stop 4a or 4 not required in each case in its rest position remains (see FIG. 3).

Since the two stops 4 and 4a are essentially at such a distance from one another are arranged, which corresponds to the length of the empty sleeve 2, 2a or 2b, reaches the empty tube 2, 2a or 2b regardless of the feed direction (Arrow f or fa) always the same stop position. Is thus described in the above The empty sleeve 2b is fed in the direction of arrow f, the stop is 4 responsible for stopping the empty tube 2b; is the empty sleeve 2a against it fed in the direction of arrow fa, it is intercepted by the stop 4a and shut down. It can be done in an analogous manner, as above with the help of FIG. 1 using the example of the holder 5 described, a monitoring device for the holder 5a 6 (not shown) can be provided for scanning the position of the holder 5a, which depending on a deflection of the holder 5a, with the usual interposition a corresponding control device (not shown), the tapes 12 and 13 of the sleeve conveyor stops. The stop that is not required 4 or 4a remains, as mentioned, with its holder 5 or 5a in its swiveled up position Rest position (see Fig. 3).

By modified control of the device shown in Fig. 5, the respective not stop 4 or 4a which intercept the empty sleeve 2, 2a or 2b as (additional) Sleeve press device are used, which in this case is lagging End of the empty sleeve 2, 2a or 2b to be stopped is brought into effect. This should be done using the example of the empty sleeve fed from the left (in the direction of arrow fa) 2a are explained, it being understood that the functional sequence is one of the other side (in the direction of arrow f) supplied empty sleeve 2b taking into account this feed direction f is analogous to this.

First, only the right stop 4a is in its working position shown in FIG. 5 brought while the stop 4 is still in its rest position or one The standby position remains in the vicinity of the transport path of the empty sleeve 2a. Reached the empty sleeve 2a its end position, so it releases in the manner described With the aid of the monitoring device 6, a stop pulse for the belts 12 and 13 the sleeve conveyor. At the same time this impulse causes that now the stop 4 is quickly lowered, which is now up with its stop surface 40 the trailing end 23 of the empty sleeve 2a sets. So in this way Tilting moment generated in two ways: on the one hand by the acute angle β (the Clarity of the drawing because not marked in Fig. 5) between the stop surface 40a of the stop 4a and the leading end face 210 of the empty sleeve 2 or 2a, on the other hand by the on the trailing end 23 of the Form the empty sleeve 2 or 2a bearing stop surface 40 of the stop 4. Thus the stop surfaces 40a and 40 together in this case are a sleeve pressing device to generate a directed against the sleeve conveyor 12, 13 Torque or tilting moment. It is of secondary importance that the trailing end 23 of the empty sleeve 2 effective stop surface 40th is only used after a delay, because the desired torque and tilting torque already exist by cooperating with the leading end 24 of the empty tube 2 Stop surface 40a is generated.

A further modification of the device described above is now based on the Fig. 4 explains. Again, the maintenance device 3 carries two stops 7 and 7a, which, however, in each case in mirror image in comparison to the stops 4 and 4a according to FIG. 5 are arranged, d. that is, their inclined abutment surfaces 70 and 70a, respectively wear on the opposite sides of the holder 5 and 5a. Again, everyone is of the two holders 5 and 5a a monitoring device 6 (not shown) assigned, for example of piezoelectric integrated in the holders 5 and 5a Elements, the emergence of an empty tube 2 on one or the other Register stop 7 or 7a due to the deformation caused thereby and then a pulse to stop or brake the bands 12 and 13 of the Generate sleeve conveyor and to initiate the work of the gripping device 30. These piezoelectric elements form the monitoring device mentioned above 6 for monitoring the position of the empty tube to be delivered 2.

If a requested empty tube 2 is to be stopped, even before the Empty sleeve 2 reaches the maintenance device 3, both stops 7 and 7a together brought into the working position shown in the transport path of the empty tube 2. Becomes for example the empty sleeve 2 is fed from the right side in the direction of the arrow f, so it runs first, d. H. before reaching their defined stop position, on the stop surface 70a of the stop 7. It causes an if also slight, deformation of the holder 5a, so that the integrated in the holder 5a piezoelectric element triggers a pulse that reduces the transport speed the belts 12 and 13 of the sleeve conveyor device. By the elastic design of the holder 5a also gently brakes the empty sleeve 2. In addition, the oblique arrangement of the abutment surface 70a causes a torque or tilting moment on the empty sleeve 2 while it is being braked acts, which reinforces the empty tube 2 against the belts 12 and 13 of the tube conveyor presses. Since the empty sleeve 2 is still the driving effect of the slowing bands 12 and 13 is subject, the empty tube 2 will continue pressed against the stop surface 70a of the stop 7a, so that the tilting moment towards the two bands 12 and 13 continues to be generated continuously becomes.

After a predetermined time, within which the belts 12 and 13 are the predetermined have certainly reached reduced speed, or if so is preferred after registration of the specified reduced target speed, what can be done with the aid of a tachometer generator or the like, not shown, the holder 5a is raised so that the stop 7a carried by it from the Transport path of the empty tube 2 is pulled away and the empty tube 2 releases. The Empty sleeve 2 can now follow the tapes 12 and 13 again. However, since this only are still driven at a reduced speed, the danger is that the Empty sleeve 2, which is still in its working position within of the transport path of the empty sleeve 2 located stop 7, uncontrolled Movements on belts 12 and 13 are carried out and fall off them, negligible. It is therefore usually sufficient if only on the holder 5 on the outside, d. H. on the side of the holder 5 which is the stop position the empty sleeve 2 (see empty sleeve 2 shown with a solid line) facing away is, a stop 7 is provided with an inclined stop surface 70. In the embodiment of the holder 5 shown as an elastic element, however, there is one when the empty sleeve 2 runs up, so that the one not shown in FIG. 4 Angle β (see Fig. 1) increased so that now a second time during the shutdown the empty sleeve 2 an increasing torque or tilting moment is generated that holds the empty tube 2 securely on the tapes 12 and 13. At the same time the probe element assigned to the holder 5, for example one on the deformation of the holder 5 responsive piezoelectric element, addressed, the impulse to stop the two belts 12 and 13 of the sleeve conveyor and to activate the gripping device 30.

The same applies in an analogous manner to an empty tube 2, which is in reverse Direction, d. H. from the left in the direction of the arrow fa, the defined stop position is fed. Here, the empty tube 2 first runs on the outside of the Holder 5, d. H. on the side facing away from the stop position of the empty sleeve 2, arranged stop surface 70 of the stop 7, whereupon the reduction the transport speed for the empty tube 2, d. H. of speed of the belts 12 and 13 of the sleeve conveyor. Then will by lifting the stop 7 released the empty tube 2, which is now reduced Speed continues until it passes through the back of the stop 7a is stopped, the holder 5a of the stop 7 stopping the belts 12 and 13 and initiating the work of the gripping device 30.

Of course, it can also be provided that the Holders 5 and 5a on both sides, d. H. on the the stop position of the Empty sleeve 2 towards and on the side facing away from this position each an inclined Stop surface 40, 70, 40a, 70a is provided (= combination of the arrangements 4 and 5). In this case, the holder 5a carries a stop 7a with a outer stop surface 70a for pre-stopping those fed in the direction of arrow f Empty sleeve 2, while the stop surface 40 carried by the holder 5 des Stop 4 (see Fig. 5) the final stopping of the empty tube 2 in the defined Stop position for their takeover by the gripping device 30 effected. In addition, the holder 5 carries an inner stop 7 with a stop surface 70 for pre-stopping an empty sleeve 2 fed in the direction of arrow fa, which after renewed release by the stop 7, definitely by the stop surface 70a of the stop 7a is stopped. The function of such a modified device is as described above with the difference that in any case if the Empty sleeve 2 runs onto one of the stops 4a, 4 or 7, 7a, but the empty sleeve 2 does not is only braked, but also always the effect of a high tipping moment is subjected, by which it can be safely on the tapes 12 and 13 or in other Formed transport elements of the sleeve conveyor device held becomes.

In the exemplary embodiments described above, the sleeve pressing device forms with their help during the speed reduction of the empty tube 2, 25 and 26 compared to the still higher speed Belts 12 and 13 or the like. The sleeve conveyor a tilting moment in Direction to the sleeve conveyor is generated, an integrated part of a or two stops 4, 4a, 7 and 7a, but the sleeve pressing device also deviate from it. For example, it can be provided be that outside of the space required for the gripping device 30 Sleeve pressing device brought to rest on the empty sleeve 2, 25 or 26 will, because of their resting on the empty tube 2, 25 or 26 working surface and their arrangement and inclination the lagging side of the empty tube 2, 25 and 26 presses more strongly against the belts 12 and 13 than the leading side. This sleeve pressing device can by the on the stop 4, 4a, 7 and 7a Bulging empty sleeve 2, 2a or 2b this function mechanically via a linkage or by activating a monitoring device arranged at a suitable point 6 trigger. By the independent of the holders 5 and 5a Training and control can be such a sleeve pressing device that the trailing end 23 of the empty sleeve 2, 25 or 26 is brought to rest, are controlled so that they coincide with or substantially simultaneously with the impact of the empty sleeve 2, 25 or 26 on the stop surface 40 or 40a Effect comes what is accordingly by the or another monitoring device 6 can be controlled.

Especially with regard to different sleeve shapes (cylindrical or conical with different conicity), but also to compensate for tolerances of the cooperating parts, it is advantageous if the holder or holders 5 and / and 5a along the transport path of the empty tube 2, 25 and 26 can be set can or can. This can be done in several ways, for example by adjusting the hinge pin 50 relative to the part 310 of the frame 31 the maintenance device 3 (see FIG. 1). Adjustments along a guide slot can be provided in an alternative manner. This setting option is important especially also when two stops 4 and 4a in pairs for generation of a torque or tilting moment work together.

The drive of the holder 5 and 5a or the holder 5 can also be different be trained. So instead of a rotary actuator, there is also a linear actuator conceivable (cylinder or rack drive, etc.), the holder 5 and / or 5a each after task (generation of the overturning moment at the front and / or at the rear End of the empty tube 2, 25 or 26, based on their feed direction) horizontally or moved vertically or on an inclined path.

The invention ensures that the tilting moment, the safe position when braking is always the greatest possible effect. This is achieved in that the stop of the sleeves, whether cylindrical or conical, always at the upper end of the Face of the sleeve is done and thus has the largest possible lever arm around Tilt sleeve. In another embodiment, the inventive device or the method is not on a movable maintenance device but arranged or carried out stationary at a work station. They are here too To take advantage of the invention as described above. Instead of the im The embodiment shown tapes 12, 13 is of course for the sleeve transport another means of transport, for example a single, wide band where the sleeve lies, can be used.

Figures 7a to 7e show a representation with pneumatically operated stops.

Figure 7a shows the basic position of a stop 4. The stop 4 is outside the center line l, on which the sleeves are conveyed. He's on one Pneumatic cylinder 8 attached. This cylinder 8 is substantially parallel to Center line l arranged. The pneumatic cylinder 8 is fastened to the pneumatic cylinder 85. The pneumatic cylinder 85 acts essentially at right angles to the center line 1.

In Figure 7b, the left sleeve stopper is extended. It is shown schematically like the pneumatic cylinder 8 on a rod 86 of the pneumatic cylinder 85 is attached. For its part, the pneumatic cylinder 8 has the stop on a rod 80 4 arranged, which is also shown in the extended position. The The extended position is determined by pressurizing the pneumatic cylinder 8 or 85 causes. After the pneumatic cylinder 8 the stop 4 in this Has reached position, the pneumatic cylinder 8 is depressurized. So that will causes the approaching sleeve 2, as shown in Figure 7c, a damping Effect is experienced when it is promoted against the stop 4. This will make the Sleeve 2 damped so that it is on the sleeve conveyor belt, not shown remains. Due to the impulse of the transported sleeve 2, the pressure-free one is switched off Pneumatic cylinder 8 inserted.

According to FIG. 7d, the pneumatic cylinder 8, which was first depressurized, is restored pressurized, thereby extending the rod 80. The one at the Rod 80 attached stop 4 thus pushes the sleeve 2 back into one predetermined position. This predetermined position is suitable for the others Takeover units on the robot. After taking over the sleeve, the Sleeve stopper moved back to its starting position, in which the rod 80 and the rod 86 are retracted.

Advantageously, the sleeve conveyor belt, not shown, runs until the Sleeve 2 is in its predetermined position according to Figure 7d. This ensures that the sleeve always abuts the stop 4. To stop the sleeve, it can be advantageous the pneumatic cylinder with a low pressure, e.g. 0.5 bar too press while the pneumatic cylinder is 6 Bar is charged. Depending on the momentum, the lower pressure which the sleeve exerts on the cylinder can be chosen so that the sleeve does not falls off the conveyor belt.

Claims (25)

Method for positioning empty sleeves of a textile machine on a sleeve conveying device with respect to a gripping device, which is arranged in particular on a maintenance device which can be moved along a plurality of spinning stations arranged next to one another, and in which the empty sleeve transported by the sleeve conveying device in a defined position by means of a at the point requiring the empty sleeve Stop is stopped, characterized in that a tilting moment is exerted on the empty sleeve during its braking in the direction of the sleeve conveying device. A method according to claim 1, characterized in that the sleeve conveying device is also stopped after the empty sleeve is stopped, and that the tilting moment is exerted on the empty sleeve from the beginning of the braking of the empty sleeve until the sleeve conveying device is stopped. Method according to claim 1 or 2, characterized in that the empty tube triggers a pulse before reaching its defined stop position, which triggers a slowed further movement of the tube conveyor device. A method according to claim 3, characterized in that the empty sleeve is braked against the sleeve conveyor device before it reaches its defined stop position and generates a tilting moment, and is released again after the sleeve conveyor device has reached its reduced transport speed. Method according to claim 4, characterized in that the tilting moment in the direction of the sleeve conveying device is exerted on the sleeve a second time during the stopping thereof. Method according to one or more of claims 1 to 5, characterized in that the tilting moment is exerted on the empty sleeve at the leading end. Method according to one or more of claims 1 to 6, characterized in that the tilting moment is increased during the braking of the empty sleeve. Device for positioning empty tubes on a tube conveyor device opposite a gripping device, which is arranged in particular on a maintenance device which can be moved along a plurality of spinning stations arranged next to one another and which has a stop which can be brought into the transport path of the empty tubes transported by the tube conveyor device, in particular for carrying out the method according to one or several of claims 1 to 7, characterized in that the stop (4, 4a, 7, 7a) is assigned a sleeve pressing device (40, 40a, 70, 70a) which causes a tilting moment in the direction of the sleeve conveying device (12, 13). Device according to claim 8, characterized in that the sleeve pressing device (40, 40a, 70, 70a) is designed as an integrated part of the stop (4, 4a, 7, 7a). Device according to Claim 9, characterized in that the stop (4, 4a) on its side facing the empty sleeve (2, 25, 26) to be stopped has a stop surface (40, 40a) which is at an acute angle (β) to the leading end face ( 21, 210) of the empty sleeve (2, 25, 26) is oriented. Apparatus according to claim 10, characterized in that the stop surface (40, 40a, 70, 70a) with the sleeve conveying device (12, 13) forms an acute angle (α) which is smaller than the angle (γ) oriented in the same direction between the end face (21, 210) of the empty sleeve (2, 25, 26) to be stopped and the sleeve conveying device (12, 13). Device according to one or more of claims 8 to 11, characterized in that the stop (4, 4a, 7, 7a) is adjustable along the transport path of the empty sleeve (2, 25, 26). Device according to one or more of claims 8 to 12, characterized in that the stop (4, 4a, 7, 7a) has a damping device (5, 5a) for the emerging empty sleeve (2, 25, 26). Device according to claim 13, characterized in that the damping device is designed as an elastic or elastically mounted holder (5, 5a) for the stop (4, 4a, 7, 7a). Device according to one or more of claims 8 to 14, characterized by a monitoring device (6) which monitors the position of the empty sleeve (2, 25, 26) and which can be addressed by the empty sleeve (2, 25, 26) reaching a predetermined position and by means of which braking or stopping of the sleeve conveying device (12, 13) can be triggered. Device according to claims 14 and 15, characterized in that the monitoring device (6) is assigned to the stop (4, 4a, 7, 7a) or holder (5, 5a). Device according to one or more of claims 8 to 16, characterized in that the stop (4, 4a, 7, 7a) is arranged on a damping element. Apparatus according to claim 17, characterized in that the damping element is a pneumatic cylinder. Apparatus according to claim 17 or 18, characterized in that the damping element is movable in the transport path of the sleeve. Device according to one or more of claims 8 to 19, with a sleeve conveyor device which can be moved optionally in one or the other longitudinal direction and with two in the maintenance device which are arranged essentially at a distance corresponding to the length of the empty sleeve, depending on the direction of movement of the sleeve conveyor device Stops that can be brought into the working position, characterized in that the two stops (4, 4a, 7, 7a) have stop surfaces (40, 40a, 70, 70a) designed as a sleeve pressing device for generating a tilting moment. Device according to one or more of claims 8 to 20, characterized in that the sleeve pressing device (4, 4a) on the end (23) lagging in relation to the transport direction of the empty sleeve (2, 25, 26) onto the empty sleeve (2, 25 , 26) can be brought into effect. Device according to claims 20 and 21, characterized in that the two stops (4, 4a) have mutually facing stop surfaces (40, 40a) designed as a sleeve pressing device, with the empty sleeve (2, 25, 26) in relation to the transport direction. leading stop (4, 4a) can be brought into the transport path of the empty sleeve (2, 25, 26) before the empty sleeve (2, 25, 26) has reached its defined stop position, and which in relation to the transport direction of the empty sleeve (2, 25, 26) trailing stop (4, 4a,) can be brought into the transport path of the empty sleeve (2, 25, 26) when the empty sleeve (2, 25, 26) reaches its stop position. Device according to claims 20 and 21, characterized in that the two stops (7, 7a) have stop surfaces (70, 70a) facing away from one another and designed as a sleeve pressing device and can be brought together into their working position, which depends on the direction of transport of the sleeve conveying device (12, 13) the stop (7, 7a) first coming into contact with the supplied empty sleeve (2, 25, 26) can be raised after a predetermined time independently of the other stop (7a, 7). Device according to claims 14, 16 or one or more of claims 17 to 20, characterized in that each of the elastic or elastically mounted holders (5, 5a) is assigned a feeler which monitors its position and forms the monitoring device (6). Apparatus according to claim 24, characterized in that the feeler device is designed as a piezoelectric switching element.

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