EP0379702B1 - Method for transporting a bobbin to a textile machine, especially to a double-twist frame, and apparatus for carrying out this method - Google Patents

Description

The invention relates to a method for transporting a bobbin to a yarn processing machine, in particular a double wire twisting machine, in which a bobbin gripper is inserted into the hollow bobbin core of the yarn bobbin and fixed there, the yarn bobbin is moved further on the bobbin gripper and onto a hollow mandrel of a conveyor system or a yarn processing unit Machine attached , after which the bobbin gripper detaches itself from the bobbin.

In modern spinning, it is often necessary to transport bobbins from one yarn-producing or yarn-processing machine to another yarn-processing machine. The transport systems used for this are essentially available in two variants, namely as a bobbin transport system that directly connects two production machines directly to one another, for example a spinning machine with an automatic winding machine, and on the other hand as a bobbin transport system that allows a flexible connection between production machines. In the latter case, the goods to be transported are transferred from an interface of the first machine to a transport system and from there to the interface of a second machine via a dispatch center.

In both of the above versions of transport systems, great care must be taken with the arrangement and location of the thread ends of the bobbins. This is necessary on the one hand for the further processing of the thread spools at the next work station, but also for safety reasons, since falling thread ends can severely hinder transport automation.

It is known in principle to carry out the transport of a bobbin by means of a bobbin gripper, as described for example in DE-PS 35 45 695.

This document deals with a device for transporting a bobbin of thread to a yarn processing machine, comprising a bobbin gripper with a cylindrical plug-in body having a hollow axial inner space, at the plug-in end of which a spreading device is arranged.

The invention has for its object to provide a method for transporting a bobbin of the type mentioned in the preamble of claim 1, in which the thread ends assume a defined fixed position in all stages of the transport, so that on the one hand no thread ends fall off during the transport process and on the other hand, the thread ends are automatically detected at the end of the transport process and thus a functional presentation of the thread end for a further work process, for example the automatic feeding and starting, that is to say picking up the thread with subsequent threading through the new processing station and further applying the thread to a new take-up sleeve is possible.

Furthermore, a facility for the implementation of this procedure should be created.

This object is achieved according to the invention with the features from the characterizing part of patent claim 1. An advantageous development of the method according to the invention is the subject of patent claim 2.

Claim 3 describes and claims a device for performing the method according to the invention. Claims 4 to 10 describe advantageous developments of the device according to claim 3.

The basic idea of the method according to the invention is, for example, when the yarn package is transferred by means of a bobbin gripper a preparation device to a transport system and from the transport system to a yarn processing machine to ensure that the thread end or, in the case of a plurality of stacked yarn bobbins, the thread ends by applying underpressure and / or overpressure respectively into the interior of the bobbin gripper or after its detachment into the interior of the hollow Core are inserted. In this way, they assume a defined position during the entire transport process, namely either in front of or within the coil core or within the coil gripper. During the next transfer process, the thread end can always be easily picked up and inserted in a defined manner.

Fig. 1

in Seitenansicht zwei übereinander angeordnete Garnspulen auf einer Vorbereitungseinrichtung;

Fig. 2

in einem gegenüber Figur 1 leicht vergrößerten Längsschnitt die Garnspulen nach Figur 1 nach dem Ansetzen eines Spulengreifers;

Fig. 3

in einem Teilschnitt die beiden Garnspulen nach Figur 1 nach ihrer Übergabe an ein Transportsystem;

Fig. 4

in einer teilweise geschnittenen Darstellung die beiden Garnspulen nach Figur 1 während des Einsetzens in eine Doppeldraht-Zwirnspindel;

Fig.4a

eine Darstellung nach Figur 4 bei einer Variante einer Doppeldraht-Zwirnspindel;

Fig. 5

in einer perspektivischen teilweise geschnittenen Darstellung die DoppeldrahtZwirnspindel nach Figur 4 während des Abnehmens des Spulengreifers.

An embodiment of the method according to the invention and a device for carrying out this method are explained in more detail below with reference to the drawings. The drawings show:

Fig. 1

in side view two yarn packages arranged one above the other on a preparation device;

Fig. 2

in a slightly enlarged longitudinal section compared to FIG. 1, the yarn bobbins according to FIG. 1 after attaching a bobbin gripper;

Fig. 3

in a partial section the two yarn packages according to Figure 1 after their transfer to a transport system;

Fig. 4

in a partially sectioned representation of the two bobbins according to Figure 1 during insertion in a double wire twisting spindle;

Fig.4a

a representation of Figure 4 in a variant of a double wire twisting spindle;

Fig. 5

in a perspective, partially sectioned representation of the double-wire twisting spindle according to FIG. 4 during the removal of the bobbin gripper.

FIG. 1 shows two single-wound cross-wound bobbins arranged one above the other, which as a pair of bobbins form the template for a double-wire twisting spindle. The yarn bobbins G1 and G2 lie with the bobbin circumference on a preparation device which is known per se and is designated overall by reference number 9 and which serves to turn the yarn bobbins and at the same time pick up the thread ends F1 and F2, for example with a suction nozzle (not shown) and as in FIG. 1 shown in the area in front of the hollow bobbin core K1 of the bobbin G1. The bobbin cores K1 and K2 of the two yarn packages G1 and G2 can optionally be connected to one another by means of a clip connection known per se.

To remove the two bobbins G1, G2 from the preparation device 9, as shown in FIG. 2, a bobbin gripper 1 is used, which is inserted into the hollow bobbin K1 and fixed there.

The coil gripper 1 has a base body which is composed of two essentially cylindrical parts 2 and 3 which are rotatable relative to one another. The two parts 2 and 3 each have a hollow axial interior 2.1 and 3.1. At the The first part 2, which faces the yarn spool G1 in FIG. 2 and has the insertion end, has a spreading device 4 designed as a pivotable bracket. The inner end of the bracket 4 is guided in the eccentrically arranged groove 6.1 of a cam 6, which is firmly connected to the second part 3 with support against a support plate 7. A handling element 5 is also arranged on the first part 2. The second part 3 is designed as a rotating element. When the parts 2 and 3 are rotated relative to one another, the bracket 4 is guided in the groove 6.1 in such a way that a spreading occurs to the outside, and the part 2 inserted into the coil core K1 is held in this.

The interior 3.1 facing the insertion end of the second part 3 is connected via a passage 3.2 to an interior 3.3 arranged in the rear part of the second part 3, in which an insert 8 is arranged in such a way that an injector is formed in such a way that a through the lateral opening 3.4 entering compressed air flow enters the axial bore 8.1 of the insert 8 and a negative pressure is generated before the passage 3.2 by the injector effect. If the injector is now actuated when the bobbin gripper 1 is inserted into the bobbin core K1, the two thread ends F1 and F2 are sucked in and introduced into the insert piece 8 through the axial interiors 2.1, 3.1 and the passage 3.2. The thread ends F1 and F2 are passed through a lateral slot 2.2 in the first part 2 at the outer end of the bobbin K1, but other ways of pneumatic movement of the Thread end conceivable.

In this state, shown in FIG. 2, the yarn packages G1 and G2 are removed from the preparation device 9 and fed to the transport system shown in FIG. During this transfer, the thread ends F1 and F2 are held in a defined position in the bobbin gripper 1.

The known type of conveyor system shown in Figure 3 has a rail 10, in which rollers 11 run, on which a support arm 12 is arranged, which carries a support bracket 13, at the lower end of which a hollow mandrel 14 is arranged, on which the coil cores K1 and K2 of the bobbins G1 and G2 can be attached in the manner shown in FIG. 3.

Before the bobbin gripper 1 is detached from the yarn bobbins, the thread ends F1 and F2 must be led out of the bobbin gripper 1 and inserted into the hollow mandrel 14 of the conveyor system so that they are again in a defined, defined position for further transport on the conveyor system.

In the illustrated embodiment, this is done by attaching the suction opening of an injector 15 to the rear end of the hollow mandrel 14. With a short actuation of this injector, the thread ends F1 and F2 are sucked into the interior of the hollow mandrel 14. Now the coil gripper 1, the injector of which was actuated only briefly when starting, can be removed and the bobbins G1 and G2 are carried on by the conveyor system.

Of course, it is also possible to feed the thread ends F1 and F2 into the hollow mandrel 14 by not attaching the injector 15 to the hollow mandrel, but by switching the injector of the bobbin gripper to "bubbles" before removing the bobbin gripper 1, so that the thread ends F1 and F2 are blown into the hollow mandrel 14.

In both cases, the thread ends are secured for further transport, and the two bobbins G1 and G2 are fed to a double-wire twisting machine by means of the transport system. There, as shown in FIG. 4, they are removed from the transport system by means of a coil gripper 21. This coil gripper 21 shown in FIG. 4 can in principle be constructed in exactly the same way as the coil gripper 1 shown in FIG. 2. It has a lower plug-in part 22 with a spreading device 24, a cam disk which is supported on the support plate 27 and is firmly connected to the second part 23 26. In the outer end of the second part 23, the insert part 28 is inserted to form an injector.

The bobbin gripper 21 is inserted in a manner not shown in the bobbin core K1 of the bobbin G1 on the conveyor system and when the bobbins G1 and G2 are removed from the conveyor system, the same processes are carried out as described above under FIGS. 1 and 2. By When the injector arranged on the bobbin gripper 21 is actuated, the thread ends F1 and F2 are sucked out of the interior of the hollow mandrel 14 and sucked into the interior of the bobbin gripper 21, so that they are finally held in the bobbin gripper 21 in the position shown in FIG. FIG. 4 shows the placement of the two yarn packages G1 and G2 on a double-wire twisting spindle.

In a known manner, the double-wire twisting spindle has a whorl 16, a turntable 17 with thread storage disk 17.1 and a protective pot 18 in which the hollow mandrel 19 is arranged axially, onto which the bobbins G1 and G2 are attached in the direction of arrow E. An injector 30 is arranged in the hollow mandrel 19, the suction end of which is connected to the interior 19.1 of the hollow mandrel 19 and the air supply duct 31 is guided through the protective pot 18 on its outer circumference, so that its air inlet opening 31.1 is by means of an opening 20.1 of the balloon limiter 20 passable connecting device 32 can be connected to a compressed air source.

To actuate the connecting device 32 and to supply compressed air through the air supply channel 31, a control valve 34 is arranged in the region of the plug-on end of the spindle outside the protective pot 18, which is connected via a line 33 to the connecting device 32, and by actuating its switch-on member 34.1 in illustrated manner, causes the connection of the connecting device 32 to a compressed air source. As can be seen from FIG. 4, the activation element 34.1 is actuated in the direction of arrow B by means of a spring-loaded actuation element 29 arranged on the handling element 25 of the bobbin gripper 21.

As can be seen from FIG. 4, the pair of yarn spools G1 and G2 is attached to the hollow mandrel 19 of the double-wire twisting spindle by means of the spool gripper 21. At the end of the push-on operation, the injector 30 is actuated by the interaction of the actuating member 29 with the switch-on member 34.1, and the thread ends F1 and F2 are sucked into the interior 9.1 of the hollow mandrel 19 from the interior of the bobbin gripper 21. The bobbin gripper 21 can then be detached from the yarn bobbins and removed. Of course, in this case too, the thread ends F1 and F2 can be introduced into the cavity 19 not only by actuating the threading device having the injector 30 but also by switching the injector arranged in the bobbin gripper 21 to "bubbles".

As can be seen from FIG. 4a, the two yarn packages G1 and G2 can also be fed to a double-wire twisting spindle, in which the thread threading device is designed somewhat differently than in the exemplary embodiment according to FIG. 4. In the double-wire twisting spindle shown in FIG Design according to Figure 4 corresponding parts with the same reference numerals. Regarding these parts, reference is made to the description given above. Instead of the injector 30 arranged in the hollow mandrel 19 occurs the embodiment of Figure 4a, a threading injector 30 'which is arranged at the intersection of the bore of the hollow mandrel 19 and the radial channel 17.2 in the storage disc 17.1. The air supply channel 31 'is through the whorl 16', which is supported via a roller bearing 16.1 on the machine stand 35, down so that its air inlet opening 31.1 'by means of a connecting device 32' and the compressed air line 33 'to the control valve 34 already described with the switch 34.1 can be connected. The processes when the bobbins G1 and G2 are fitted onto this double-wire twisting spindle are the same as described under FIG. 4.

FIG. 5 shows once again the yarn bobbins G1 and G2 inserted in the double-wire twisting spindle, including the thread ends F1 and F2 of the two yarn bobbins sucked into the upper region of the hollow mandrel 19. The coil gripper 21 is removed in the direction of arrow A.

There is now a thread template on the double-wire twisting spindle, which is suitable for any further automation process. For example, an automatic threading machine suck in the thread ends again, pull off enough further thread length and thread it through the usual thread path of a double-wire twisting spindle by actuating the spindle-integrated, compressed air-loaded threading device.

Of course, it is also possible to remove the bobbins directly from a preparation device without interposing a transport system and remove it from the double-wire twist spindle.

In the exemplary embodiments described above, a method for transporting a yarn spool to a double-wire twisting machine was described, the yarn spools being designed as cross-wound bobbins, two of which are inserted one above the other in the double-wire twisting spindle. Of course, the same method can also be used with specialist bobbins wound with several threads in connection with specialist machines.

Claims (10)

1. A method of transporting a yarn bobbin to a yarn-processing machine, in particular a two-for-one twisting machine, in which a bobbin gripper (1, 21) travels into the hollow bobbin core (K1, K2) of the yarn bobbin (G1, G2) and fixes itself there, the yarn bobbin is further moved on the bobbin gripper and is plugged onto a hollow mandrel (14 or respectively 19) of a conveying system (10-13) or of a yarn-processing machine (16-20), after which the bobbin gripper (1, 21) detaches itself again from the yarn bobbin (G1, G2), characterised in that the thread end (F1, F2) of the yarn bobbin (G1, G2) prior to the transport procedure is arranged in the region in front of or in the interior of the bobbin core (K1, K2), upon the grasping of the yarn bobbin by the bobbin gripper (1, 21) is sucked by means of underpressure into an inner space of the bobbin gripper and after the plugging of the yarn bobbin onto the hollow mandrel (14 or respectively 19) is blown by means of overpressure from the bobbin gripper (1, 21) or respectively sucked by means of underpressure from the hollow mandrel (14, 19) into the interior of the hollow mandrel.
2. A method according to claim 1, characterised in that in a first method step the yarn bobbin (G1, G2) is superimposed by means of a first bobbin gripper (1) from a preparation mechanism (9) onto the hollow mandrel (14) of a conveying system (10-13), in which respect the thread end (F1, F2) is first of all conducted from the region in front of the bobbin core into the interior of the first bobbin gripper (1) and then into the interior of the hollow mandrel (14) and in a second method step the yarn bobbin (G1, G2) is removed by means of a second bobbin gripper (21) from the hollow mandrel (14) of the conveying system and is superimposed onto the reception device (16-20) which has a hollow mandrel (16), e.g. the spindle of a yarn-processing machine, in which respect the thread end (F1, F2) is first of all conducted out of the hollow mandrel (14) of the conveying system into the interior of the second bobbin gripper (21) and is then conducted into the interior of the hollow mandrel (19) of the reception device.
3. Apparatus for transporting a yarn bobbin (G1, G2) to a yarn-processing machine, comprising a bobbin gripper (1, 21) with a cylindrical plug-in body (2-3; 22-23) which has a hollow axial interior (3.1; 23.1), at the plug-in end of which a spreading device (4, 24) is arranged, for carrying out the method according to claim 1, characterised in that connected to the interior (3.1. 23.1) of the plug-in body (2-3, 22-23) at the side remote from the plug-in end is the suction end (3.2, 23.2) of a pneumatic yarn conveying mechanism (8-28), connected or connectable to the bobbin gripper, for sucking at least one thread end into the interior of the gripper, and in that a further pneumatic yarn conveying mechanism is provided, in order subsequently to introduce the thread end or ends again into the hollow bobbin core of the yarn bobbin.
4. Apparatus according to claim 3, characterised in that the pneumatic yarn conveying mechanism (8, 28) is designed as an injector which is integrated into the bobbin gripper.
5. Apparatus according to claim 3 or 4 for carrying out the method according to claim 2, characterised by a first bobbin gripper (1) having a pneumatic yarn conveying mechanism (8) for the transport of the yarn bobbin from a preparation mechanism (9) to a conveying system (10-13) having at least one hollow mandrel (14), as well as a second bobbin gripper (21) having a pneumatic yarn conveying mechanism (28) for the transport of the yarn bobbin from the conveying system to the reception device, having a hollow mandrel (19), of a yarn-processing machine.
6. Apparatus according to one of claims 3 to 5, characterised in that, in the case of the hollow mandrel (19) arranged on the conveying system (10-13) and/or the yarn-processing machine (16-20), the suction end of a further pneumatic yarn conveying mechanism (15, 30) is connected to or can be attached to the end lying opposite to the plug-on end.
7. Apparatus according to one of claims 3 to 6, characterised in that each bobbin gripper (1) has a plug-in body consisting of two cylindrical parts (2, 3) which are mutually rotatable and which respectively have a hollow axial inner space (2.1, 3.1), in which respect arranged on the first part (2) linking on to the plug-in end is a spreading device (4), the movement of which is controllable by rotation of the second part (3) remote from the plug-in end, and a radially projecting handling element (5) is arranged on the first part (2), while the second part (3) is designed as a rotation element.
8. Apparatus according to claim 5, characterised in that a device (29) for controlling an injector connected to the spindle is arranged at least on the bobbin gripper (21) conveying the yarn bobbin to the reception device (16-20) of the yarn-processing machine.
9. Apparatus according to claim 8 on a two-for-one twisting machine, in which arranged in or on the spindle in the region of the end remote from the plug-on end is an injector (30), the air supply duct (31) of which is connectable to a source of compressed air, characterised in that in the region of the plug-on end of the spindle outside the protective pot (18) a control valve (34) for the feed of the compressed air is arranged in such a way that its switch-on member (34.1) upon the plugging of the yarn bobbin (G1, G2) onto the spindle in the end position of the yarn bobbin co-operates with an actuation member (29) arranged on the bobbin gripper (21).
10. Apparatus according to claim 9, characterised in that the air supply duct (31) of the injector (30) which is arranged in the spindle is conducted through the protective pot (18) of the spindle at the outer circumference thereof, where it is connectable by way of a connection device (32) to the source of compressed air.

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