EP0325992B1 - Method and apparatus for restoring a spinning operation after an interruption - Google Patents

Method and apparatus for restoring a spinning operation after an interruption Download PDF

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Publication number
EP0325992B1
EP0325992B1 EP89100710A EP89100710A EP0325992B1 EP 0325992 B1 EP0325992 B1 EP 0325992B1 EP 89100710 A EP89100710 A EP 89100710A EP 89100710 A EP89100710 A EP 89100710A EP 0325992 B1 EP0325992 B1 EP 0325992B1
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EP
European Patent Office
Prior art keywords
spinning
bobbin
piecing
unit
yarn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP89100710A
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German (de)
French (fr)
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EP0325992A1 (en
Inventor
Hans Raasch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Textile GmbH and Co KG
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W Schlafhorst AG and Co
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Publication date
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Publication of EP0325992A1 publication Critical patent/EP0325992A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/50—Piecing arrangements; Control therefor for rotor spinning

Definitions

  • the invention relates to a method for restoring the spinning operation after an interruption at a spinning position of an OE spinning machine with the features of the preamble of claim 1 and a device for carrying out this method with the features of the preamble of claim 7.
  • the bobbin changer carries sleeves which are already prepared for spinning by having already wound an initial length of the thread. After this so-called starter spool has been clamped, the spinning takes place as if a thread break had occurred.
  • This system has been used very successfully so far. In the event of a batch change, however, there must be a predetermined amount of the yarn which is to be spun with the new batch. This specific amount of yarn has to be provided first. Only then can the starting bobbins be wound and only then is it possible to carry out the bobbin change or batch change at the individual spinning positions in succession.
  • the piecing and changing capacity of such a combined device is low, however, because during the removal of a thread break occurring during the spinning process, the bobbin changing unit must remain inactive, that is, it cannot operate at other spinning positions at the same time.
  • the change capacity is particularly low if the changer has a device for preparing the thread start on the finished package and the cycle time for a bobbin change is thereby extended. It is therefore often necessary to have several combined changing and piecing units working on one OE spinning machine, which is very complex and cumbersome.
  • the invention has for its object to develop this known method so that the change capacity can be increased and to propose a device for performing the method.
  • this object is achieved on the process side by the characterizing features of claim 1 and on the device side by the characterizing features of claim 7.
  • FIG. 2 to 5 show the devices shown in FIG. 1 at different times of the re-piecing.
  • the spinning box 6 containing a rotatable spinning element for example a rotor 6 ', contains a sliver 7 originating from a sliver can 7' and, after an OE spinning process, spins a thread 8 'which is drawn through an extraction tube 8 from the spinning box 6 is subtracted.
  • a feed drive 9 continuously pulls the sliver 7 into the spin box 6.
  • the fiber sliver is dissolved into individual fibers by means of a dissolving device (not shown here), which is driven by a dissolving drive 10.
  • the fibers collect again and reach the open end of the thread 8' rotating about its longitudinal axis.
  • friction rollers can serve as spinning elements in another configuration.
  • the drives 10 and 11 are designed here as whorls, which are driven by tangential belts 10 'and 11'.
  • the air serving in a known manner for fiber transport is extracted from the spin box 6 via a suction air connection 12.
  • the thread 8 ' is drawn off at a constant speed from the take-off shaft 13 with the aid of a pinch roller 14 resting resiliently on the thread and on the take-off shaft.
  • the thread guide 16 oscillates in the immediate vicinity of the bobbin 1, so that the thread 8 'is deposited on the bobbin 1 rotating in the direction of the arrow 1' in intersecting turns and layers.
  • the cheese 1 is pivotally held by a bobbin frame 18. It lies on the winding drum 17 and is driven by friction.
  • the piecing unit 23 has a trolley 24, the rollers 24 'of which are supported on the rail 25. Under the travel rail 25 there is a traverse 26 carrying suction air, which supplies the piecing unit 23 with suction air via a suction connection 27 which can be coupled. Busbars 28 supply the piecing unit 23 with electrical energy. At the lower end, the piecing unit 23 is supported by support rollers 29 against support rails 30 arranged on the spin boxes 6 of the individual spinning positions.
  • the piecing unit 23 has a first piecing program and, according to this first piecing program, switchable devices for spinning a thread 8 'returned from the cross-wound bobbin 1 to the spinning element 6' and a second piecing program and devices switchable according to this second piecing program for piecing one from a supply spool 33 to the spinning element 6 'Returned auxiliary thread 33a, as well as a thread break or its consequences of responsive switching means for starting the first piecing program and of a spool change or its prompting or its consequences of addressable switching means for starting the second piecing program.
  • a device 31 for rotating the cheese 1 is pivotally mounted on the housing of the piecing unit 23.
  • the device 31 consists of a pivotable arm, at the end of which there is a drive roller 31 '.
  • the drive roller 31 ' has a built-in motor and can be driven with the help of it rotating forward and backward.
  • a long frame lifter 32 is also pivotally mounted on the housing of the piecing unit 23. The frame lifter 32 is arranged so that it can grip under a handle 18 'of the coil frame 18 and thereby raise and lower the coil frame 18. With a side movement, he can also open and close the left frame arm.
  • a supply spool 33 is mounted on the housing of the piecing unit 23, which supplies an auxiliary thread 33a for piecing on the occasion of a package change.
  • the auxiliary thread 33a is clamped between a conveyor roller 34 and a pinch roller 35.
  • An investor 36 is connected through a branch line 27 'to the suction port 27.
  • the feeder 36 is also pivotally mounted on the housing of the piecing unit 23. It is hollow and therefore able to suck the auxiliary thread 33a on the conveyor roller 34 when it assumes the position shown in FIG. 1.
  • the feeder 36 can still up to swivel behind the right or rear sleeve receiving plate of the bobbin frame 18, wherein it guides the sucked-in thread so that the thread is gripped by the sleeve plate and, for example, is clamped between the sleeve plate and the sleeve.
  • the thread can be held on the take-off roller 39 by applying a pinch roller 40.
  • a puller 37 is pivotable about the pivot point 37a. It serves to pull down a thread sucked in by the suction nozzle 4 in order to insert it into a cutting and untwisting device 41 and into a thread feeder 42. For this purpose, the puller 37 pivots downward from an upper position into the position shown, taking the thread with it.
  • the feeder 36 pivots in a plane located far back on the housing of the piecing unit 23. He can therefore not easily pass an auxiliary thread 33a picked up on the conveyor roller 34 to the puller 37.
  • the auxiliary thread 33a is guided to the center for insertion into a thread feeder 42 and into a cutting and untwisting device 41. This is done by a guide lever 38, which can pivot from the rear to the center.
  • the cutting and untwisting device 41 has the task of cutting off the inserted thread and preparing the end of the thread for piecing, for example by pneumatic unscrewing.
  • the thread feeder 42 brings the thread end by a pivoting movement of the feeder arm 42 'into the suction area of the draw-off tube 8 of the spinning unit 6.
  • the thread is pulled by the take-off roller 39 of the piecing unit 23 brought down and returned to the normal running position at the spinning position. This is done by a transmitter 43 which is pivotable against the pulling action of a tension spring 44 about the pivot point 43 '.
  • the transmitter 43 At at its end the transmitter 43 carries a small roller 43a which is arranged axially parallel to the take-off roller 39 when the transmitter 43 assumes its rest position shown in FIG. 1.
  • the thread is pressed laterally from the take-off roller 39 onto the roll 43a of the transfer device 43 and at the same time the winding speed of the cheese 1 is increased somewhat.
  • the transmitter 43 is pulled against the force of the spring 44 in the direction of the spinning station.
  • the thread loop present between the spinning station and the piecing unit 23 is used up.
  • the suction nozzle 4 pivots against the package 1. After picking up the thread, the suction nozzle 4 pivots back so far that the puller 37 can grasp the sucked thread in front of the suction mouth 4 '(FIG. 5), in order for it to be pieced in normally insert the cutting and untwisting device 41 and into the thread feeder 42.
  • a bobbin changing unit 50 which can in principle be constructed as described in German Offenlegungsschrift 36 02 574, is supported with its changer running gear 51 on a changer travel rail 52.
  • the changer travel rail 52 is supported by hanging brackets 52 attached to the cross member 26 '.
  • Support rollers 53 of the bobbin changing unit 50 rest on a support rail 54.
  • the support rail 54 is fastened to the supports 20. Under the support rail 54, busbars 55 are attached, which supply the bobbin changing unit 50 with electrical energy.
  • a suction nozzle 56 serves to pick up the thread on the finished package 1.
  • the bobbin frame 18 is raised by means of the frame lifter 32 to such an extent that the package 1 loses contact with the winding drum 17 .
  • To seek out the It is driven against the winding direction by a bobbin drive 58.
  • the bobbin drive 58 is located on the inside of the suction nozzle 56.
  • the suction nozzle 56 also serves as an ejector for the fully wound cross-wound bobbin 1.
  • the bobbin frame 18 is opened by the bobbin changing unit, while the suction nozzle 56 swivels clockwise and thereby pushes the bobbin 1 out of the bobbin frame 18 until it reaches the bobbin conveyor belt 19 can roll.
  • the bobbin changing unit has a sleeve feeder 59 which is pivotable about the pivot point 59 '.
  • the sleeve clamp 59a of the sleeve feeder 59 is fed from a sleeve magazine 60, which according to the drawing contains at least four sleeves 60 ', a sleeve 2.
  • a sleeve feeder 59 By pivoting the sleeve feeder 59 clockwise, the new sleeve is inserted into the bobbin frame 18 after the cheese 1 has been removed.
  • the piecing unit 23 has switching means that are responsive to the bobbin change for starting the second piecing program, in which an auxiliary thread is used. These switching means consist of a sensor 67 which is able to detect a request button 66 protruding from the machine frame 20 'of the spinning station.
  • a signal transmitter 61 of the bobbin changing unit 50 presses on the end of the bobbin changing process on a switch 62 which is located at the spinning position.
  • the movement of the switch-on button 62 is transmitted to the request button 66 via a coupling 63, an angle lever 64 and a further coupling 65.
  • the sensor 67 recognizes the projecting request button 66 and has the piecing unit 23 stop at the spinning position and go into the park position.
  • the signal transmitter 61 is a switch coupled to a sequence control device (not shown here) of the bobbin changing unit 50, which is actuated by the sequence control device as soon as the bobbin change has ended.
  • the parts 62 to 65 represent an active connection which, in accordance with the signal transmitter 61, allows the request button 66 to respond as a further signal transmitter, which in turn establishes the active connection to the sensor 67.
  • the piecing unit 23 also has switching means which are responsive to a yarn break for starting the first piecing program, in which the yarn end is brought back from the package 1 and introduced into the spin box 6 for piecing.
  • These switching means consist of a further sensor 68 which is responsive to a further request button 71 projecting from the machine frame 20 '.
  • the request button 71 is connected to a thread monitor 70 by an operative connection 69, for example an electrical line. In the event of thread breakage, a surge of current goes through the active connection 69 to the request button 71, which then projects and can be detected by the sensor 68 when the piecing unit 23 approaches.
  • the sensor 68 causes the piecing unit 23 to stop in front of the relevant spinning station.
  • the piecing unit 23 goes into the park position and the sensor 68 starts the first piecing program, which is also described in more detail below.
  • Fig. 1 shows the spinning station after the normal spinning operation has ended.
  • the piecing unit 23 parks at random in front of the spinning station.
  • the bobbin changing unit 50 brought in is parked above the spinning station and is already ready to replace the package 1 with an empty tube.
  • the spinning process was automatically interrupted and the bobbin exchange unit 50 was requested. This was done in a way known in itself. There is, for example, the possibility of having the bobbin changing unit 50 stop in front of the spinning station in that the spinning station extends a bolt which at the same time also triggers the signal for the automatic bobbin changing unit 50 to act.
  • the spool change was explained above. After the bobbin change, the bobbin changing unit 50 extends the signal transmitter 61, which results in the pushing of the request button 66. This influences the sensor 67 and, if the piecing unit 23 happens to be already parked at the spinning position, piecing program no. 2 is started immediately.
  • the feeder 36 grasps the auxiliary thread 33a on the conveyor roller 34 and sucks it on. With the thread sucked in, it then pivots into the position shown in FIG. 2, the auxiliary thread 33a being transferred to the draw-off roller 39. By placing the pinch roller 40 against the take-off roller 39, the auxiliary thread 33a has been pinched. Thereafter, the guide lever 38 presses the auxiliary thread 33a towards the center so that the puller 37 can grip it from the position shown in solid lines in FIG. 2. When swiveling down, the puller 37 grasps the auxiliary thread 33a and takes it downward as a loop, as shown in FIG. 2. The conveyor roller 34 delivers the necessary thread length.
  • the auxiliary thread 33a is guided past the feeder 42 and the cutting and clamping device 41. Thereafter, the puller 37 pivoted from the position 37 'up again while the pinch roller 40 is opened slightly, so that the auxiliary thread 33a is held under tension by the suction effect of the feeder 36.
  • the auxiliary thread 33a then lies in the clamps of the thread feeder 42 and in the cutting and untwisting device 41, as shown in FIG. 2.
  • the auxiliary thread 33a is cut off on the cutting device. Its end is unraveled and turned up.
  • One thread end of the auxiliary thread 33a is thus already prepared for piecing.
  • the thread feeder 42 now pivots in the clockwise direction until it comes into the position shown in FIG. 3, the thread end can be released and pneumatically passed through the draw-off tube 8 to the spinning element 6 '. There, the thread end is placed on already existing or fed fibers, whereupon the thread can be withdrawn from the spinning box, because now the new thread formation has started, especially since the feed drive 9 has also been started.
  • Fig. 3 shows the piecing unit 23 in a position in which the sleeve 2 is clamped in the coil frame 18.
  • the feeder 42 has been pivoted against the draw-off tube of the spin box 6 and had brought the thread end of the auxiliary thread 33a into the suction area of the draw-off tube 8.
  • the take-off roller 39 had conveyed the auxiliary thread 33a back out of the feeder 36 in the direction of the spin box 6.
  • the piecing time has just been exceeded.
  • the thread end has connected to newly fed fibers and the take-off roller 39 now pulls the auxiliary thread 33a and the thread 8 argues spun onto it from the spin box 6 at a constant speed.
  • the thread 8 ⁇ is sucked off by the feeder 36.
  • Fig. 4 shows the position of the piecing unit 23 when applying the thread 8 ⁇ to the sleeve 2.
  • the frame lifter 32 holds the bobbin frame 18 raised so far that the sleeve 2 does not yet touch the winding drum 17.
  • the drive roller 31 ' drives the coil 2 in the direction of arrow 1', that is, in the winding direction.
  • the feeder 36, the continuously spun thread 8 ⁇ sucks, swings past the rear sleeve plate of the coil frame 18. As a result, the trailing thread 8 ⁇ comes into a position in which it can be gripped by gripping slots known per se on the sleeve plate.
  • the thread 8 ⁇ After the thread 8 ⁇ has been detected and begins to wind up on the sleeve 2, it is separated by a cutting device, not shown here, attached to the mouth of the feeder 36. The separated end, on which the auxiliary thread piece also hangs, is suctioned off.
  • the feeder 36 can be provided at its end with a contour which first guides the thread to the edge of the sleeve so that an initial reserve can form there. Then the thread 8 ⁇ is pressed down by the take-off roller 39 and delivered to the roll 43a of the transfer device 43. The thread loop is now used up by increased winding speed and as soon as this has happened, the frame lifter 32 releases the bobbin frame 18.
  • the piecing unit 23 can abandon its parking position and continue to another location.
  • the thread monitor 70 detects the thread breakage and extends the request button 71. Sensor 68 reacts to this, has the piecing unit stopped in front of the spinning position and starts piecing program No. 1.
  • Fig. 5 shows the piecing unit 23 in preparation for piecing after a normal thread break at the spinning position.
  • the frame lifter 32 has gripped the bobbin frame 18 and has lifted the package 1 from the winding drum 17.
  • the drive roller 31 'of the device 31 is located on the cheese 1.
  • the suction nozzle 4 had previously applied to the package 1 around the end of the thread take up and suck.
  • Fig. 5 shows that the suction nozzle 4 is already pivoted back and keeps the thread 8 8 tensioned.
  • the puller 37 can now swivel up into the position shown in dashed lines, slide past the tensioned thread 8 ′′′, then swivel back again and take the thread 8 ′′′ with it.
  • the thread 8 ′′′ is pulled out into a loop, as also shown in FIG. 5.
  • the thread 8 ′′′ lies on the take-off roller 39.
  • the pinch roller 40 is applied by pivoting down its pinch roller lever 40 'against the take-off roller 39, as shown in phantom in Fig. 5.
  • the puller 37 swings up again.
  • the thread loop slides into the thread feeder 42 and into the cutting and untwisting device 41.
  • the thread 8 ′′′ is now cut between the suction nozzle 4 and the untwisting device.
  • the new thread end is opened as described above for program no. 2 and thus prepared for piecing.
  • the feeder arm 42 'of the thread feeder 42 now pivots clockwise around its pivot point 42a and thereby carries the new thread end of the thread 8 ′′′ into the suction area of the draw-off tube 8 of the spin box 6.
  • the piecing now takes place in the same way as described above for program No. 2.
  • the thread is drawn off the take-off roller 39 and wound with the aid of the transmitter 43 onto the cheese 1, which is driven by the drive roller 31 'in the direction of the arrow 1'.
  • the thread is transferred to the spinning station in the manner specified above for program no. 2.
  • the piecing unit 23 can have a signal generator 49, which checks the coil frame 18 for the presence of an empty bobbin tube 2. There is an active connection 48 from the signal transmitter 49 to the switching means 67. As soon as the signal transmitter 49 detects an empty coil sleeve clamped in the coil frame at a spinning position, a signal goes to the switching means 67, which then causes the piecing unit 23 to stop in front of the spinning station and to start the second piecing program.
  • the signal for stopping the piecing unit 23 in front of the spinning station and for starting the second piecing program can be triggered, for example, when the spinning station receives an empty bobbin tube, either from the bobbin changing unit 50 or from the receiving bobbin unit and forwarded to a central computer of the OE spinning machine, which thereupon forwards this signal together with an identification signal to the piecing unit 23 so that the piecing unit 23 does not lose any time, can drive to the spinning station to be operated and can also immediately identify the correct spinning station.
  • the signal transmission between the OE spinning machine, spinning station, bobbin changing unit and piecing unit can take place without contact by means of optical or electromagnetic signals, variable electrical or magnetic fields or the like.
  • the signals can also be transmitted by making contact, for example with the aid of electromechanical switches.
  • a yarn length counter 47 can be arranged on the OE spinning machine or at the spinning station.
  • the yarn length counter 47 determines the accumulated yarn length, for example, by counting the revolutions of the winding drum 17.
  • the yarn length counter 47 automatically sets itself to zero, for example, and calls the bobbin changing unit 50 to change the bobbin in a manner not shown here.
  • a button 72 designed as a request button Signal generator which in turn acts on the switching means 67 of a passing piecing unit 23 in order to cause the piecing unit 23 to stop at the spinning position and to select the second piecing program.
  • Whether the piecing program starts immediately depends on whether the bobbin change has taken place in the meantime. Either the piecing program starts after a predetermined period of time has elapsed, or the start is initiated by one of the signal transmitters described above.

Description

Die Erfindung betrifft ein Verfahren Zum Wiederherstellen des Spinnbetriebs nach einer Unterbrechung an einer Spinnstelle einer OE-Spinnmaschine mit den Merkmalen des Oberbegriffs des Anspruches 1 und eine Einrichtung zur Durchführung dieses Verfahrens mit den Merkmalen des Oberbegriffs des Anspruches 7.The invention relates to a method for restoring the spinning operation after an interruption at a spinning position of an OE spinning machine with the features of the preamble of claim 1 and a device for carrying out this method with the features of the preamble of claim 7.

Eine hohe Wechselkapazität haben Systeme, bei denen Spulenwechsler und Anspinneinrichtung unabhängige Aggregate sind, die ohne gegenseitige Beeinflussung an den einzelnen Spinnstellen arbeiten können (zum Beispiel DE-OS 25 06 362). Der Spulenwechsler führt Hülsen mit sich, die schon dadurch zum Anspinnen vorbereitet sind, daß sie bereits eine Anfangslänge des Fadens aufgewickelt haben. Nach dem Einspannen dieser sogenannten Starterspule geschieht das Anspinnen so, als sei ein Fadenbruch eingetreten. Dieses System wurde bisher sehr erfolgreich eingesetzt. Bei einem Partiewechel muß jedoch eine vorbestimmte Menge desjenigen Garns vorhanden sein, welches mit der neuen Partie gesponnen werden soll. Diese bestimmte Garnmenge ist zunächst bereitzustellen. Dann erst können die Startespulen gewickelt werden und erst danach ist es möglich, an den einzelnen Spinnstellen nacheinander den Spulenwechsel beziehungsweise Partiewechsel durchzuführen.Systems in which the bobbin changer and piecing device are independent units which can work at the individual spinning stations without mutual interference (for example DE-OS 25 06 362) have a high interchangeability. The bobbin changer carries sleeves which are already prepared for spinning by having already wound an initial length of the thread. After this so-called starter spool has been clamped, the spinning takes place as if a thread break had occurred. This system has been used very successfully so far. In the event of a batch change, however, there must be a predetermined amount of the yarn which is to be spun with the new batch. This specific amount of yarn has to be provided first. Only then can the starting bobbins be wound and only then is it possible to carry out the bobbin change or batch change at the individual spinning positions in succession.

Es sind auch schon kombinierte Wechsel- und Anspinnaggregate entwickelt worden (zum Beispiel: EP-A-106 809), von denen die Erfindung als am nächsten kommender Stand der Technik ausgeht und mit denen nach einem Kreuzspulenwechsel die Spinneinrichtung mit Hilfe eines Fremdfadens angesponnen wird. Der angesponnene Faden wird durch ein Saugrohr aufgenommen und von diesem an die Hülse, auf der die neue Kreuzspule hochgewickelt werden soll, angelegt.Combined changing and piecing units have already been developed (for example: EP-A-106 809), from which the invention is based as the closest prior art and with which the spinning device is spun with the help of a foreign thread after a package change. The spun thread is taken up by a suction tube and from there it is applied to the sleeve on which the new package is to be wound up.

Die Anspinn- und Wechselkapazität eines solchen kombinierten Gerätes ist aber niedrig, weil während der Behebung eines beim Spinnvorgang entstehenden Fadenbruchs das Spulenwechselaggregat zwangsweise untätig bleiben muß, also nicht zur gleichen Zeit an anderen Spinnstellen tätig werden kann. Besonders niedrig ist die Wechselkapazität dann, wenn der Wechsler eine Einrichtung zum Bereitlegen des Fadenanfangs auf der fertigen Kreuzspule hat und sich dadurch die Zykluszeit für einen Spulenwechsel verlängert. Es ist daher vielfach notwendig, mehrere kombinierte Wechsel- und Anspinnaggregat an einer OE-Spinnmaschine arbeiten zu lassen, was sehr aufwendig und hinderlich ist.The piecing and changing capacity of such a combined device is low, however, because during the removal of a thread break occurring during the spinning process, the bobbin changing unit must remain inactive, that is, it cannot operate at other spinning positions at the same time. The change capacity is particularly low if the changer has a device for preparing the thread start on the finished package and the cycle time for a bobbin change is thereby extended. It is therefore often necessary to have several combined changing and piecing units working on one OE spinning machine, which is very complex and cumbersome.

Der Erfindung liegt die Aufgabe zugrunde, dieses bekannte Verfahren so weiterzuentwickeln, daß die Wechselkapazität erhöht werden kann und eine Einrichtung zur Durchführung des Verfahrens vorzuschlagen.The invention has for its object to develop this known method so that the change capacity can be increased and to propose a device for performing the method.

Gemäß der Erfindung wird diese Aufgabe verfahrensseitig durch die kennzeichnenden Merkmale des Anspruches 1 und vorrichtungsseitig durch die kennzeichnenden Merkmale des Anspruches 7 gelöst.According to the invention, this object is achieved on the process side by the characterizing features of claim 1 and on the device side by the characterizing features of claim 7.

Die Erfindung ist vorteilhaft durch die Merkmale der Ansprüche 2 bis 6 und 8 bis 11 weitergebildet.The invention is advantageously developed by the features of claims 2 to 6 and 8 to 11.

Ein Ausführungsbeispiel der Erfindung ist in den Fig. 1 bis 5 dargestellt. Anhand des Ausführungsbeispiels wird die Erfindung näher beschrieben und erläutert.

Fig. 1
zeigt in Seitenansicht eine Spinnstelle mit davor geparktem Anspinnaggregat und darüber geparktem Spulenwechselaggregat.
An embodiment of the invention is shown in FIGS. 1 to 5. The invention is described and explained in more detail using the exemplary embodiment.
Fig. 1
shows a side view of a spinning station with the piecing unit parked in front of it and the bobbin changing unit parked above it.

Die Fig. 2 bis 5 zeigen in Fig. 1 dargestellte Einrichtungen zu verschiedenen Zeitpunkten des Wiederanspinnens.2 to 5 show the devices shown in FIG. 1 at different times of the re-piecing.

Gemäß Fig. 1 zieht die ein rotierbares Spinnelement, beispielsweise einen Rotor 6′, enthaltende Spinnbox 6 ein aus einer Faserbandkanne 7′ stammendes Faserband 7 ein und spinnt nach einem OE-Spinnverfahren einen Faden 8′, der durch ein Abzugsrohr 8 aus der Spinnbox 6 abgezogen wird. Ein Einzugsantrieb 9 zieht das Faserband 7 kontinuierlich in die Spinnbox 6 ein. Durch eine hier nicht näher dargestellte, von einem Auflöseantrieb 10 angetriebene Auflöseeinrichtung wird das Faserband in Einzelfasern aufgelöst. In dem Spinnelement 6′, das durch den Antrieb 11 angetrieben wird, sammeln sich die Fasern wieder und gelangen an das offene Ende des sich um seine Längsachse drehenden Fadens 8′. Statt eines Rotors können bei anderer Ausbildung beispielsweise Friktionswalzen als Spinnelemente dienen. Die Antriebe 10 und 11 sind hier als Wirtel ausgebildet, die durch Tangentialriemen 10′ und 11′ angetrieben werden.1, the spinning box 6 containing a rotatable spinning element, for example a rotor 6 ', contains a sliver 7 originating from a sliver can 7' and, after an OE spinning process, spins a thread 8 'which is drawn through an extraction tube 8 from the spinning box 6 is subtracted. A feed drive 9 continuously pulls the sliver 7 into the spin box 6. The fiber sliver is dissolved into individual fibers by means of a dissolving device (not shown here), which is driven by a dissolving drive 10. In the spinning element 6 ', which is driven by the drive 11, the fibers collect again and reach the open end of the thread 8' rotating about its longitudinal axis. Instead of a rotor, for example, friction rollers can serve as spinning elements in another configuration. The drives 10 and 11 are designed here as whorls, which are driven by tangential belts 10 'and 11'.

Die in bekannter Weise dem Fasertransport dienende Luft wird über einen Saugluftanschluß 12 aus der Spinnbox 6 abgesaugt. Der Faden 8′ wird mit konstanter Geschwindigkeit von der Abzugswelle 13 unter Zuhilfenahme einer federnd am Faden und an der Abzugswelle anliegenden Klemmrolle 14 abgezogen. Über einen Umlenkdraht 15 wird der Faden 8′ zu einem hin und her gehenden Fadenführer 16 geleitet. Der Fadenführer 16 changiert in unmittelbarer Nähe der Kreuzspule 1, so daß der Faden 8′ auf der in Richtung des Pfeils 1′ rotierenden Kreuzspule 1 in sich kreuzenden Windungen und Lagen abgelegt wird.The air serving in a known manner for fiber transport is extracted from the spin box 6 via a suction air connection 12. The thread 8 'is drawn off at a constant speed from the take-off shaft 13 with the aid of a pinch roller 14 resting resiliently on the thread and on the take-off shaft. About a deflecting wire 15, the thread 8 'to a back and forth thread guide 16th headed. The thread guide 16 oscillates in the immediate vicinity of the bobbin 1, so that the thread 8 'is deposited on the bobbin 1 rotating in the direction of the arrow 1' in intersecting turns and layers.

Die Kreuzspule 1 wird schwenkbar durch einen Spulenrahmen 18 gehalten. Sie liegt auf der Spultrommel 17 auf und wird durch Friktion angetrieben.The cheese 1 is pivotally held by a bobbin frame 18. It lies on the winding drum 17 and is driven by friction.

Sobald die gewünschte Spulenfülle, die gewünschte Fadenlänge oder die gewünschte Spulengröße erreicht ist, wird automatisch ein Fadenbruch erzeugt, die betreffende Spinnstelle also außer Betrieb genommen. Fertige Kreuzspulen 1 gelangen auf ein rückwärtiges Spulentransportband 19.As soon as the desired bobbin filling, the desired thread length or the desired bobbin size is reached, a thread break is automatically generated, the spinning station in question is therefore taken out of operation. Finished packages 1 arrive on a rear bobbin conveyor belt 19.

Am Maschinengestell 20′ befestige Stützen 20 halten eine Tragkonstruktion 22 für die Fahrschiene 25 eines längs der OE-Spinnmaschine verfahrbaren automatischen Anspinnaggregats 23.On the machine frame 20 'fasten supports 20 hold a support structure 22 for the travel rail 25 of an automatic piecing unit 23 which can be moved along the OE spinning machine.

Das Anspinnaggregat 23 hat ein Fahrwerk 24, dessen Rollen 24′ sich auf der Fahrschiene 25 abstützen. Unter der Fahrschiene 25 befindet sich eine Saugluft führende Traverse 26, die das Anspinnaggregat 23 über einen ankoppelbaren Sauganschluß 27 mit Saugluft versorgt. Stromschienen 28 versorgen das Anspinnaggregat 23 mit elektrischer Energie. Am unteren Ende stützt sich das Anspinnaggregat 23 durch Stützrollen 29 gegen auf den Spinnboxen 6 der einzelnen Spinnstellen angeordnete Stützschienen 30 ab.The piecing unit 23 has a trolley 24, the rollers 24 'of which are supported on the rail 25. Under the travel rail 25 there is a traverse 26 carrying suction air, which supplies the piecing unit 23 with suction air via a suction connection 27 which can be coupled. Busbars 28 supply the piecing unit 23 with electrical energy. At the lower end, the piecing unit 23 is supported by support rollers 29 against support rails 30 arranged on the spin boxes 6 of the individual spinning positions.

Das Anspinnaggregat 23 besitzt ein erstes Anspinnprogramm und nach diesem ersten Anspinnprogramm schaltbare Einrichtungen zum Anspinnen eines von der Kreuzspule 1 zum Spinnelement 6′ zurückgeführten Fadens 8˝ und ein zweites Anspinnprogramm und nach diesem zweiten Anspinnprogramm schaltbare Einrichtungen zum Anspinnen eines von einer Vorratsspule 33 zum Spinnelement 6′ zurückgeführten Hilfsfadens 33a, sowie auf einen Fadenbruch oder seine Folgen ansprechbare Schaltmittel zum Starten des ersten Anspinnprogramms und auf einen Spulenwechsel oder seine Veranlassung oder seine Folgen ansprechbare Schaltmittel zum Starten des zweiten Anspinnprogramms.The piecing unit 23 has a first piecing program and, according to this first piecing program, switchable devices for spinning a thread 8 'returned from the cross-wound bobbin 1 to the spinning element 6' and a second piecing program and devices switchable according to this second piecing program for piecing one from a supply spool 33 to the spinning element 6 'Returned auxiliary thread 33a, as well as a thread break or its consequences of responsive switching means for starting the first piecing program and of a spool change or its prompting or its consequences of addressable switching means for starting the second piecing program.

Zum Ausführen des ersten Anspinnprogramms, das durch eine mit Kurvenscheibensätzen versehene Folgeschalteinrichtung konventionell fixiert sein kann, ist eine Einrichtung 31 zum Drehen der Kreuzspule 1 schwenkbar am Gehäuse des Anspinnaggregats 23 gelagert. Die Einrichtung 31 besteht aus einem schwenkbaren Arm, an dessen Ende sich eine Antriebsrolle 31′ befindet. Die Antriebsrolle 31′ hat einen eingebauten Motor und kann mit dessen Hilfe vorwärts- und rückwärtsdrehend angetrieben werden. Ein langer Rahmenheber 32 ist ebenfalls schwenkbar am Gehäuse des Anspinnaggregats 23 gelagert. Der Rahmenheber 32 ist so angeordnet, daß er unter ein Griffstück 18′ des Spulenrahmens 18 greifen und dadurch den Spulenrahmen 18 heben und senken kann. Mit einer Seitenbewegung kann er außerdem den linken Rahmenarm öffnen und schließen.For executing the first piecing program, which can be conventionally fixed by a follower device provided with cam disk sets, a device 31 for rotating the cheese 1 is pivotally mounted on the housing of the piecing unit 23. The device 31 consists of a pivotable arm, at the end of which there is a drive roller 31 '. The drive roller 31 'has a built-in motor and can be driven with the help of it rotating forward and backward. A long frame lifter 32 is also pivotally mounted on the housing of the piecing unit 23. The frame lifter 32 is arranged so that it can grip under a handle 18 'of the coil frame 18 and thereby raise and lower the coil frame 18. With a side movement, he can also open and close the left frame arm.

Zum Ausführen des zweiten Anspinnprogramms, das ebenfalls durch eine Modifikation der mit Kurvenscheibensätzen versehenen Folgeschalteinrichtung konventionell fixiert sein kann, ist am Gehäuse des Anspinnaggregats 23 eine Vorratsspule 33 gelagert, die einen Hilfsfaden 33a zum Anspinnen anläßlich eines Kreuzspulenwechsels liefert. Der Hilfsfaden 33a ist zwischen eine Förderwalze 34 und eine Klemmrolle 35 eingeklemmt. Ein Anleger 36 ist durch eine Zweigleitung 27′ an den Sauganschluß 27 angeschlossen. Der Anleger 36 ist ebenfalls am Gehäuse des Anspinnaggregats 23 schwenkbar gelagert. Er ist hohl und daher in der Lage, den Hilfsfaden 33a an der Förderwalze 34 anzusaugen, wenn er die in Fig. 1 dargestellte Stellung einnimmt. Mit einer Schwenkbewegung kann er den angesaugten Hilfsfaden 33 in den Bereich einer Abzugswalze 39 bringen, die während des Anspinnens den Fadenabzug übernimmt. Der Anleger 36 kann aber noch bis hinter den rechten beziehungsweise hinteren Hülsenaufnahmeteller des Spulenrahmens 18 schwenken, wobei er den angesaugten Faden so führt, daß der Faden vom Hülsenteller erfaßt und beispielsweise zwischen Hülsenteller und Hülse eingeklemmt wird.In order to execute the second piecing program, which can also be fixed conventionally by modifying the sequential switching device provided with cam disk sets, a supply spool 33 is mounted on the housing of the piecing unit 23, which supplies an auxiliary thread 33a for piecing on the occasion of a package change. The auxiliary thread 33a is clamped between a conveyor roller 34 and a pinch roller 35. An investor 36 is connected through a branch line 27 'to the suction port 27. The feeder 36 is also pivotally mounted on the housing of the piecing unit 23. It is hollow and therefore able to suck the auxiliary thread 33a on the conveyor roller 34 when it assumes the position shown in FIG. 1. With a swivel movement, he can bring the suctioned auxiliary thread 33 into the area of a take-off roller 39, which takes over the thread take-off during the spinning. The feeder 36 can still up to swivel behind the right or rear sleeve receiving plate of the bobbin frame 18, wherein it guides the sucked-in thread so that the thread is gripped by the sleeve plate and, for example, is clamped between the sleeve plate and the sleeve.

An der Abzugswalze 39 kann der Faden durch das Anlegen einer Klemmrolle 40 gehalten werden. Ein Einzieher 37 ist um den Schwenkpunkt 37a schwenkbar. Er dient dazu, einen durch die Saugdüse 4 angesaugten Faden nach unten zu ziehen, um ihn in eine Schneid- und Aufdreheinrichtung 41 und in einen Fadenzubringer 42 einzulegen. Hierzu schwenkt der Einzieher 37 aus einer oberen Stellung nach unten in die dargestellte Stellung, wobei er den Faden mitnimmt.The thread can be held on the take-off roller 39 by applying a pinch roller 40. A puller 37 is pivotable about the pivot point 37a. It serves to pull down a thread sucked in by the suction nozzle 4 in order to insert it into a cutting and untwisting device 41 and into a thread feeder 42. For this purpose, the puller 37 pivots downward from an upper position into the position shown, taking the thread with it.

Der Anleger 36 schwenkt in einer weit hinten am Gehäuse des Anspinnaggregats 23 gelegenen Ebene. Er kann einen an der Förderwalze 34 abgeholten Hilfsfaden 33a daher nicht ohne weiteres an den Einzieher 37 übergeben. In diesem Fall wird der Hilfsfaden 33a zum Einlegen in einen Fadenzubringer 42 und in eine Schneid- und Aufdreheinrichtung 41 zur Mitte geführt. Dies geschieht durch einen Leithebel 38, der eine Schwenkbewegung von hinten zur Mitte ausüben kann.The feeder 36 pivots in a plane located far back on the housing of the piecing unit 23. He can therefore not easily pass an auxiliary thread 33a picked up on the conveyor roller 34 to the puller 37. In this case, the auxiliary thread 33a is guided to the center for insertion into a thread feeder 42 and into a cutting and untwisting device 41. This is done by a guide lever 38, which can pivot from the rear to the center.

Die Schneid- und Aufdreheinrichtung 41 hat die Aufgabe, den eingelegten Faden abzuschneiden und das Fadenende für das Anspinnen vorzubereiten, zum Beispiel durch pneumatisches Aufdrehen. Der Fadenzubringer 42 bringt das Fadenende durch eine Schwenkbewegung des Zubringerarms 42′ in den Saugbereich des Abzugsrohrs 8 des Spinnaggregats 6. Nach dem Anspinnen beziehungsweise nach dem Anlegen des Fadens an die in den Spulenrahmen 18 eingespannte Hülse wird der Faden von der Abzugswalze 39 des Anspinnaggregats 23 heruntergeführt und in die normale Laufposition an der Spinnstelle zurückgeführt. Dies geschieht durch einen Übergeber 43, der gegen die Zugwirkung einer Zugfeder 44 um den Schwenkpunkt 43′ schwenkbar ist. An seinem Ende trägt der Übergeber 43 eine kleine Rolle 43a, die achsparallel zur Abzugswalze 39 angeordnet ist, wenn der Übergeber 43 seine in Fig. 1 dargestellte Ruhestellung einnimmt. Zum Übergeben wird der Faden von der Abzugswalze 39 aus seitlich auf die Rolle 43a des Übergebers 43 gedrückt und zugleich wird die Aufwickelgeschwindigkeit der Kreuzspule 1 etwas erhöht. Entsprechend der erhöhten Aufwickelgeschwindigkeit wird der Übergeber 43 gegen die Kraft der Feder 44 in Richtung auf die Spinnstelle gezogen. Dabei wird die zwischen Spinnstelle und Anspinnaggregat 23 vorhandene Fadenschlaufe aufgebraucht.The cutting and untwisting device 41 has the task of cutting off the inserted thread and preparing the end of the thread for piecing, for example by pneumatic unscrewing. The thread feeder 42 brings the thread end by a pivoting movement of the feeder arm 42 'into the suction area of the draw-off tube 8 of the spinning unit 6. After piecing or after placing the thread on the sleeve clamped in the bobbin frame 18, the thread is pulled by the take-off roller 39 of the piecing unit 23 brought down and returned to the normal running position at the spinning position. This is done by a transmitter 43 which is pivotable against the pulling action of a tension spring 44 about the pivot point 43 '. At at its end the transmitter 43 carries a small roller 43a which is arranged axially parallel to the take-off roller 39 when the transmitter 43 assumes its rest position shown in FIG. 1. For the transfer, the thread is pressed laterally from the take-off roller 39 onto the roll 43a of the transfer device 43 and at the same time the winding speed of the cheese 1 is increased somewhat. In accordance with the increased winding speed, the transmitter 43 is pulled against the force of the spring 44 in the direction of the spinning station. The thread loop present between the spinning station and the piecing unit 23 is used up.

Zum Fadensuchen schwenkt die Saugdüse 4 gegen die Kreuzspule 1. Nach dem Aufnehmen des Fadens schwenkt die Saugdüse 4 soweit zurück, daß der Einzieher 37 den angesaugten Faden vor der Ansaugmündung 4′ erfassen kann (Fig. 5), um ihn für das normale Anspinnen in die Schneid- und Aufdreheinrichtung 41 und in den Fadenzubringer 42 einzulegen.For thread searching, the suction nozzle 4 pivots against the package 1. After picking up the thread, the suction nozzle 4 pivots back so far that the puller 37 can grasp the sucked thread in front of the suction mouth 4 '(FIG. 5), in order for it to be pieced in normally insert the cutting and untwisting device 41 and into the thread feeder 42.

Ein Spulenwechselaggregat 50, das prinzipiell so aufgebaut sein kann, wie es in der deutschen Offenlegungsschrift 36 02 574 beschrieben ist, stützt sich mit seinem Wechslerfahrwerk 51 auf einer Wechslerfahrschiene 52 ab. Die Wechslerfahrschiene 52 wird durch an der Traverse 26 befestigte Hängestützen 52′ getragen. Stützrollen 53 des Spulenwechselaggregats 50 liegen auf einer Stützschiene 54 auf. Die Stützschiene 54 ist an den Stützen 20 befestigt. Unter der Stützschiene 54 sind Stromschienen 55 angebracht, die dem Spulenwechselaggregat 50 elektrische Energie zuführen.A bobbin changing unit 50, which can in principle be constructed as described in German Offenlegungsschrift 36 02 574, is supported with its changer running gear 51 on a changer travel rail 52. The changer travel rail 52 is supported by hanging brackets 52 attached to the cross member 26 '. Support rollers 53 of the bobbin changing unit 50 rest on a support rail 54. The support rail 54 is fastened to the supports 20. Under the support rail 54, busbars 55 are attached, which supply the bobbin changing unit 50 with electrical energy.

Wie bereits in der deutschen Offenlegungsschrift 36 02 574 näher beschrieben ist, dient eine Saugdüse 56 dem Aufnehmen des Fadens auf der fertigen Kreuzspule 1. Hierzu wird der Spulenrahmen 18 mittels des Rahmenhebers 32 soweit angehoben, daß die Kreuzspule 1 den Kontakt mit der Spultrommel 17 verliert. Zum Aufsuchend des Fadenendes wird sie durch einen Spulenantrieb 58 entgegen der Wickelrichtung angetrieben. Der Spulenantrieb 58 befindet sich an der Innenseite der Saugdüse 56. Sobald der Faden aufgefunden und angesaugt ist, wird die Drehrichtung des Spulenantriebs 58 umgekehrt, so daß der Faden nun durch einen schräg verlaufenden Leitkanal 57 zur Seite gelenkt wird, so daß er sich auf das seitlich herausragende Ende der Hülse der Kreuzspule 1 als Fadenreserve aufwickelt.As has already been described in more detail in German Offenlegungsschrift 36 02 574, a suction nozzle 56 serves to pick up the thread on the finished package 1. For this purpose, the bobbin frame 18 is raised by means of the frame lifter 32 to such an extent that the package 1 loses contact with the winding drum 17 . To seek out the It is driven against the winding direction by a bobbin drive 58. The bobbin drive 58 is located on the inside of the suction nozzle 56. As soon as the thread is found and sucked in, the direction of rotation of the bobbin drive 58 is reversed, so that the thread is now directed to the side by an obliquely extending guide channel 57, so that it acts on the laterally protruding end of the sleeve of the package 1 wound as a thread reserve.

Die Saugdüse 56 dient gleichzeitig auch als Auswerfer für die fertiggewickelte Kreuzspule 1. Hierzu wird der Spulenrahmen 18 durch das Spulenwechselaggregat geöffnet, während die Saugdüse 56 in Schwenkrichtung des Uhrzeigers schwenkt und dabei die Kreuzspule 1 aus dem Spulenrahmen 18 soweit herausdrückt, bis sie auf das Spulentransportband 19 abrollen kann.The suction nozzle 56 also serves as an ejector for the fully wound cross-wound bobbin 1. For this purpose, the bobbin frame 18 is opened by the bobbin changing unit, while the suction nozzle 56 swivels clockwise and thereby pushes the bobbin 1 out of the bobbin frame 18 until it reaches the bobbin conveyor belt 19 can roll.

Das Spulenwechselaggregat besitzt einen Hülsenzubringer 59, der um den Schwenkpunkt 59′ schwenkbar ist. Der Hülsenklemme 59a des Hülsenzubringers 59 wird aus einem Hülsenmagazin 60, das laut Zeichnung mindestens vier Hülsen 60′ enthält, eine Hülse 2 zugeführt. Durch eine Schwenkbewegung des Hülsenzubringers 59 im Uhrzeigersinn wird die neue Hülse nach dem Entfernen der Kreuzspule 1 in den Spulenrahmen 18 eingesetzt.The bobbin changing unit has a sleeve feeder 59 which is pivotable about the pivot point 59 '. The sleeve clamp 59a of the sleeve feeder 59 is fed from a sleeve magazine 60, which according to the drawing contains at least four sleeves 60 ', a sleeve 2. By pivoting the sleeve feeder 59 clockwise, the new sleeve is inserted into the bobbin frame 18 after the cheese 1 has been removed.

Das Anspinnaggregat 23 besitzt auf den Spulenwechsel ansprechbare Schaltmittel zum Starten des zweiten Anspinnprogramms, bei dem ein Hilfsfaden verwendet wird. Diese Schaltmittel bestehen aus einem Sensor 67, der in der Lage ist, einen aus dem Maschinengestell 20′ der Spinnstelle vorspringenden Anforderungsknopf 66 zu erkennen. Ein Signalgeber 61 des Spulenwechselaggregats 50 drückt nach Abschluß des Spulenwechselvorgangs auf einen Einschaltknopf 62, der sich an der Spinnstelle befindet. Die Bewegung des Einschaltknopfes 62 überträgt sich über eine Koppel 63, einen Winkelhebel 64 und eine weitere Koppel 65 auf den Anforderungsknopf 66. Der Sensor 67 erkennt den vorspringenden Anforderungsknopf 66 und läßt das Anspinnaggregat 23 an der Spinnstelle anhalten und in Parkstellung gehen. Außerdem startet er das zweite Anspinnprogramm, das weiter unten näher beschrieben wird. Bei dem Signalgeber 61 handelt es sich um einen mit einer hier nicht dargestellten Folgesteuervorrichtung des Spulenwechselaggregats 50 gekoppelten Schalter, der von der Folgesteuervorrichtung betätigt wird, sobald der Spulenwechsel beendet ist. Die Teile 62 bis 65 stellen eine Wirkverbindung dar, die nach Maßgabe des Signalgebers 61 den Anforderungsknopf 66 als weiteren Signalgeber ansprechen läßt, der seinerseits die Wirkverbindung zum Sensor 67 herstellt.The piecing unit 23 has switching means that are responsive to the bobbin change for starting the second piecing program, in which an auxiliary thread is used. These switching means consist of a sensor 67 which is able to detect a request button 66 protruding from the machine frame 20 'of the spinning station. A signal transmitter 61 of the bobbin changing unit 50 presses on the end of the bobbin changing process on a switch 62 which is located at the spinning position. The movement of the switch-on button 62 is transmitted to the request button 66 via a coupling 63, an angle lever 64 and a further coupling 65. The sensor 67 recognizes the projecting request button 66 and has the piecing unit 23 stop at the spinning position and go into the park position. He also starts the second piecing program, which is described in more detail below. The signal transmitter 61 is a switch coupled to a sequence control device (not shown here) of the bobbin changing unit 50, which is actuated by the sequence control device as soon as the bobbin change has ended. The parts 62 to 65 represent an active connection which, in accordance with the signal transmitter 61, allows the request button 66 to respond as a further signal transmitter, which in turn establishes the active connection to the sensor 67.

Das Anspinnaggregat 23 besitzt außerdem auf einen Fadenbruch ansprechbare Schaltmittel zum Starten des ersten Anspinnprogramms, bei dem das Fadenende von der Kreuzspule 1 zurückgeholt und zum Anspinnen in die Spinnbox 6 eingebracht wird. Diese Schaltmittel bestehen aus einem weiteren Sensor 68, der auf einen aus dem Maschinengestell 20′ vorspringenden weiteren Anforderungsknopf 71 ansprechbar ist. Der Anforderungsknopf 71 ist durch eine Wirkverbindung 69, beispielsweise eine elektrische Leitung mit einem Fadenwächter 70 verbunden. Bei Fadenbruch geht ein Stromstoß durch die Wirkverbindung 69 zum Anforderungsknopf 71, der daraufhin vorspringt und bei Annäherung des Anspinnaggregats 23 durch dessen Sensor 68 erkannt werden kann. Der Sensor 68 veranlaßt das Anhalten des Anspinnaggregats 23 vor der betreffenden Spinnstelle. Das Anspinnaggregat 23 geht in Parkstellung und der Sensor 68 startet das erste Anspinnprogramm, das ebenfalls weiter unten noch näher beschrieben wird.The piecing unit 23 also has switching means which are responsive to a yarn break for starting the first piecing program, in which the yarn end is brought back from the package 1 and introduced into the spin box 6 for piecing. These switching means consist of a further sensor 68 which is responsive to a further request button 71 projecting from the machine frame 20 '. The request button 71 is connected to a thread monitor 70 by an operative connection 69, for example an electrical line. In the event of thread breakage, a surge of current goes through the active connection 69 to the request button 71, which then projects and can be detected by the sensor 68 when the piecing unit 23 approaches. The sensor 68 causes the piecing unit 23 to stop in front of the relevant spinning station. The piecing unit 23 goes into the park position and the sensor 68 starts the first piecing program, which is also described in more detail below.

Fig. 1 zeigt die Spinnstelle nach dem Beenden des normalen Spinnbetriebs. Das Anspinnaggregat 23 parkt zufällig vor der Spinnstelle. Das herbeigeholte Spulenwechselaggregat 50 parkt über der Spinnstelle und ist schon zu einem Wechsel der Kreuzspule 1 gegen eine leere Hülse bereit.Fig. 1 shows the spinning station after the normal spinning operation has ended. The piecing unit 23 parks at random in front of the spinning station. The bobbin changing unit 50 brought in is parked above the spinning station and is already ready to replace the package 1 with an empty tube.

Durch Erreichen der vorgegebenen Fadenlänge oder Spulenfülle oder des vorgesehenen Spulendurchmessers wurde der Spinnprozeß automatisch unterbrochen und das Spulenwechselaggragat 50 angefordert. Dies geschah auf an und für sich bekannte Weise. Es besteht beispielsweise die Möglichkeit, das Spulenwechselaggregat 50 dadurch vor der Spinnstelle anhalten zu lassen, daß die Spinnstelle einen Riegel ausfährt, der zugleich auch das Signal zum Tätigwerden des automatischen Spulenwechselaggregats 50 auslöst. Der Spulenwechsel wurde weiter oben erläutert. Nach dem Spulenwechsel fährt das Spulenwechselaggregat 50 den Signalgeber 61 aus, was das Vorschieben des Anforderungsknopfes 66 zur Folge hat. Dadurch wird der Sensor 67 beeinflußt und, falls das Anspinnaggregat 23 zufällig schon an der Spinnstelle parkt, sofort das Anspinnprogramm Nr. 2 gestartet.When the specified thread length or bobbin fullness or the intended bobbin diameter was reached, the spinning process was automatically interrupted and the bobbin exchange unit 50 was requested. This was done in a way known in itself. There is, for example, the possibility of having the bobbin changing unit 50 stop in front of the spinning station in that the spinning station extends a bolt which at the same time also triggers the signal for the automatic bobbin changing unit 50 to act. The spool change was explained above. After the bobbin change, the bobbin changing unit 50 extends the signal transmitter 61, which results in the pushing of the request button 66. This influences the sensor 67 and, if the piecing unit 23 happens to be already parked at the spinning position, piecing program no. 2 is started immediately.

Der Anleger 36 erfaßt den Hilfsfaden 33a an der Förderwalze 34 und saugt ihn an. Mit angesaugtem Faden schwenkt er dann in die in Fig. 2 dargestellte Position, wobei der Hilfsfaden 33a an die Abzugswalze 39 übergeben wird. Durch Anlegen der Klemmrolle 40 gegen die Abzugswalze 39 ist der Hilfsfaden 33a eingeklemmt worden. Danach drückt der Leithebel 38 den Hilfsfaden 33a zur Mitte, damit der Einzieher 37 ihn aus der in Fig. 2 mit durchgezogenen Linien dargestellten Position heraus erfassen kann. Beim Herabschwenken erfaßt der Einzieher 37 den Hilfsfaden 33a und nimmt ihn als Schlaufe nach unten mit, wie es Fig. 2 zeigt. Die Förderwalze 34 liefert währenddessen die nötige Fadenlänge nach. Beim Nachuntenziehen der Fadenschlaufe wird der Hilfsfaden 33a am Zubringer 42 und an der Schneid- und Klemmeinrichtung 41 vorbeigeführt. Danach schwenkte der Einzieher 37 aus der Stellung 37′ wieder nach oben, während die Klemmrolle 40 etwas geöffnet wird, so daß der Hilfsfaden 33a durch die Saugwirkung des Anlegers 36 unter Spannung gehalten wird.The feeder 36 grasps the auxiliary thread 33a on the conveyor roller 34 and sucks it on. With the thread sucked in, it then pivots into the position shown in FIG. 2, the auxiliary thread 33a being transferred to the draw-off roller 39. By placing the pinch roller 40 against the take-off roller 39, the auxiliary thread 33a has been pinched. Thereafter, the guide lever 38 presses the auxiliary thread 33a towards the center so that the puller 37 can grip it from the position shown in solid lines in FIG. 2. When swiveling down, the puller 37 grasps the auxiliary thread 33a and takes it downward as a loop, as shown in FIG. 2. The conveyor roller 34 delivers the necessary thread length. When pulling the thread loop down, the auxiliary thread 33a is guided past the feeder 42 and the cutting and clamping device 41. Thereafter, the puller 37 pivoted from the position 37 'up again while the pinch roller 40 is opened slightly, so that the auxiliary thread 33a is held under tension by the suction effect of the feeder 36.

Daraufhin legt der Hilfsfaden 33a sich in die Klemmen des Fadenzubringers 42 und in die Schneid- und Aufdreheinrichtung 41 ein, wie es Fig. 2 zeigt. Der Hilfsfaden 33a wird an der Schneideinrichtung abgeschnitten. Sein Ende wird aufgefasert und aufgedreht. Das eine Fadenende des Hilfsfadens 33a ist damit schon zum Anspinnen vorbereitet.The auxiliary thread 33a then lies in the clamps of the thread feeder 42 and in the cutting and untwisting device 41, as shown in FIG. 2. The auxiliary thread 33a is cut off on the cutting device. Its end is unraveled and turned up. One thread end of the auxiliary thread 33a is thus already prepared for piecing.

Wenn nun der Fadenzubringer 42 in Richtung des Uhrzeigers schwenkt, bis er in die in Fig. 3 dargestellte Stellung kommt, kann das Fadenende freigegeben und durch das Abzugsrohr 8 hindurch pneumatisch zum Spinnelement 6′ geleitet werden. Dort wird das Fadenende an bereits vorhandene oder dorthin zugespeiste Fasern angelegt, worauf der Wiederabzug des Fadens aus der Spinnbox erfolgen kann, weil nun die laufende Fadenneubildung eingesetzt hat, zumal auch der Einzugsantrieb 9 gestartet wurde.If the thread feeder 42 now pivots in the clockwise direction until it comes into the position shown in FIG. 3, the thread end can be released and pneumatically passed through the draw-off tube 8 to the spinning element 6 '. There, the thread end is placed on already existing or fed fibers, whereupon the thread can be withdrawn from the spinning box, because now the new thread formation has started, especially since the feed drive 9 has also been started.

Fig. 3 zeigt das Anspinnaggregat 23 in einer Position, in der die Hülse 2 in den Spulenrahmen 18 eingespannt ist. Der Zubringer 42 ist gegen das Abzugsrohr der Spinnbox 6 geschwenkt worden und hatte das Fadenende des Hilfsfadens 33a in den Saugbereich des Abzugsrohrs 8 gebracht. Die Abzugswalze 39 hatte den Hilfsfaden 33a aus dem Anleger 36 heraus in Richtung auf die Spinnbox 6 zurückgefördert. Der Anspinnzeitpunkt ist gerade überschritten worden. Das Fadenende hat sich mit neu eingespeisten Fasern verbunden und die Abzugswalze 39 zieht jetzt den Hilfsfaden 33a und den daran angesponnenen Faden 8˝ mit konstanter Geschwindigkeit aus der Spinnbox 6. Der Faden 8˝ wird vom Anleger 36 abgesaugt.Fig. 3 shows the piecing unit 23 in a position in which the sleeve 2 is clamped in the coil frame 18. The feeder 42 has been pivoted against the draw-off tube of the spin box 6 and had brought the thread end of the auxiliary thread 33a into the suction area of the draw-off tube 8. The take-off roller 39 had conveyed the auxiliary thread 33a back out of the feeder 36 in the direction of the spin box 6. The piecing time has just been exceeded. The thread end has connected to newly fed fibers and the take-off roller 39 now pulls the auxiliary thread 33a and the thread 8 daran spun onto it from the spin box 6 at a constant speed. The thread 8˝ is sucked off by the feeder 36.

Fig. 4 zeigt die Position des Anspinnaggregats 23 beim Anlegen des Fadens 8˝ an die Hülse 2. Der Rahmenheber 32 hält den Spulenrahmen 18 so weit angehoben, daß die Hülse 2 noch nicht die Spultrommel 17 berührt. Die Antriebsrolle 31′ treibt die Spule 2 in Richtung des Pfeils 1′, das heißt in Aufwickelrichtung, an. Der Anleger 36, der den fortlaufend gesponnenen Faden 8˝ absaugt, schwenkt am hinteren Hülsenteller des Spulenrahmens 18 vorbei. Dadurch kommt der nachlaufende Faden 8˝ in eine Lage, in der er von an und für sich bekannten Greifschlitzen am Hülsenteller erfaßt werden kann. Nachdem der Faden 8˝ erfaßt worden ist und beginnt, sich auf die Hülse 2 aufzuwickeln, wird er durch eine hier nicht dargestellte, an der Mündung des Anlegers 36 angebrachte Schneidvorrichtung getrennt. Das abgetrennte Ende, an dem auch das Hilfsfadenstück hängt, wird abgesaugt. Der Anleger 36 kann an seinem Ende mit einer Kontur versehen sein, die den Faden zunächst an den Hülsenrand führt, damit sich dort eine Anfangsreserve bilden kann. Dann wird der Faden 8˝ von der Abzugswalze 39 heruntergedrückt und an die Rolle 43a des Übergebers 43 abgegeben. Durch erhöhte Aufwickelgeschwindigkeit wird nun die Fadenschlaufe aufgebraucht und sobald dies geschehen ist, gibt der Rahmenheber 32 den Spulenrahmen 18 frei. Dadurch legt sich die Hülse 2 auf die Spultrommel 17 auf und zugleich wird der Faden 8˝ vom Fadenführer 16 erfaßt. Die nicht mehr benötigte Antriebsrolle 31′ wird ausgeschaltet und durch Zurückschwenken der Einrichtung 31 zurückgezogen. Der Anspinnvorgang nach Programm Nr. 2 ist jetzt beendet. Das Anspinnaggregat 23 kann seine Parkstellung aufgeben und an einen anderen Einsatzort weiterfahren.Fig. 4 shows the position of the piecing unit 23 when applying the thread 8˝ to the sleeve 2. The frame lifter 32 holds the bobbin frame 18 raised so far that the sleeve 2 does not yet touch the winding drum 17. The drive roller 31 'drives the coil 2 in the direction of arrow 1', that is, in the winding direction. The feeder 36, the continuously spun thread 8˝ sucks, swings past the rear sleeve plate of the coil frame 18. As a result, the trailing thread 8˝ comes into a position in which it can be gripped by gripping slots known per se on the sleeve plate. After the thread 8˝ has been detected and begins to wind up on the sleeve 2, it is separated by a cutting device, not shown here, attached to the mouth of the feeder 36. The separated end, on which the auxiliary thread piece also hangs, is suctioned off. The feeder 36 can be provided at its end with a contour which first guides the thread to the edge of the sleeve so that an initial reserve can form there. Then the thread 8˝ is pressed down by the take-off roller 39 and delivered to the roll 43a of the transfer device 43. The thread loop is now used up by increased winding speed and as soon as this has happened, the frame lifter 32 releases the bobbin frame 18. As a result, the sleeve 2 lies on the winding drum 17 and at the same time the thread 8 'is gripped by the thread guide 16. The no longer required drive roller 31 'is switched off and pulled back by pivoting the device 31. The piecing process according to program no. 2 has now ended. The piecing unit 23 can abandon its parking position and continue to another location.

Tritt während des Spinnens ein Fadenbruch auf, so wird nach dem ersten Anspinnprogramm verfahren. Der Fadenwächter 70 stellt den Fadenbruch fest und fährt den Anforderungsknopf 71 aus. Darauf reagiert der Sensor 68, läßt das Anspinnaggregat vor der Spinnstelle anhalten und startet das Anspinnprogramm Nr. 1.If a thread break occurs during spinning, the first piecing program is followed. The thread monitor 70 detects the thread breakage and extends the request button 71. Sensor 68 reacts to this, has the piecing unit stopped in front of the spinning position and starts piecing program No. 1.

Fig. 5 zeigt das Anspinnaggregat 23 bei der Vorbereitung für das Anspinnen nach einem normalen Fadenbruch an der Spinnstelle. Der Rahmenheber 32 hat den Spulenrahmen 18 erfaßt und die Kreuzspule 1 von der Spultrommel 17 abgehoben. Die Antriebsrolle 31′ der Einrichtung 31 liegt an der Kreuzspule 1 an. Die Saugdüse 4 hatte sich zuvor schon an die Kreuzspule 1 angelegt, um das Fadenende aufzunehmen und anzusaugen. Fig. 5 zeigt, daß die Saugdüse 4 bereits zurückgeschwenkt ist und dabei den aufgenommenen Faden 8‴ gespannt hält. Der Einzieher 37 kann jetzt in die gestrichelt gezeichnete Position hochschwenken, dabei an dem gespannten Faden 8‴ vorbeigleiten, dann wieder zurückschwenken und den Faden 8‴ mitnehmen. Hierbei wird der Faden 8‴ zu einer Schlaufe ausgezogen, wie es ebenfalls Fig. 5 zeigt. Dabei legt sich der Faden 8‴ auf die Abzugswalze 39 auf. Danach wird die Klemmrolle 40 durch Herabschwenken ihres Klemmrollenhebels 40′ gegen die Abzugswalze 39 angelegt, wie es strichpunktiert in Fig. 5 dargestellt ist. Nun schwenkt der Einzieher 37 wieder nach oben. Dadurch gleitet die Fadenschlaufe in den Fadenzubringer 42 und in die Schneid- und Aufdrehvorrichtung 41. Der Faden 8‴ wird nun zwischen Saugdüse 4 und Aufdrehvorrichtung geschnitten. Das neue Fadenende wird wie weiter oben zu Programm Nr. 2 beschrieben aufgedreht und dadurch zum Anspinnen vorbereitet. Der Zubringerarm 42′ des Fadenzubringers 42 schwenkt jetzt im Uhrzeigersinn um seinen Drehpunkt 42a und trägt dadurch das neue Fadenende des Fadens 8‴ in den Saugbereich des Abzugsrohrs 8 der Spinnbox 6.Fig. 5 shows the piecing unit 23 in preparation for piecing after a normal thread break at the spinning position. The frame lifter 32 has gripped the bobbin frame 18 and has lifted the package 1 from the winding drum 17. The drive roller 31 'of the device 31 is located on the cheese 1. The suction nozzle 4 had previously applied to the package 1 around the end of the thread take up and suck. Fig. 5 shows that the suction nozzle 4 is already pivoted back and keeps the thread 8 8 tensioned. The puller 37 can now swivel up into the position shown in dashed lines, slide past the tensioned thread 8 ‴, then swivel back again and take the thread 8 ‴ with it. Here, the thread 8 ‴ is pulled out into a loop, as also shown in FIG. 5. The thread 8 ‴ lies on the take-off roller 39. Thereafter, the pinch roller 40 is applied by pivoting down its pinch roller lever 40 'against the take-off roller 39, as shown in phantom in Fig. 5. Now the puller 37 swings up again. As a result, the thread loop slides into the thread feeder 42 and into the cutting and untwisting device 41. The thread 8 ‴ is now cut between the suction nozzle 4 and the untwisting device. The new thread end is opened as described above for program no. 2 and thus prepared for piecing. The feeder arm 42 'of the thread feeder 42 now pivots clockwise around its pivot point 42a and thereby carries the new thread end of the thread 8 ‴ into the suction area of the draw-off tube 8 of the spin box 6.

Das Anspinnen geschieht jetzt in der gleichen Art und Weise, wie es weiter oben zu Programm Nr. 2 beschrieben wurde. Nach dem Anspinnen wird der Faden von der Abzugswalze 39 abgezogen und mit Hilfe des Übergebers 43 auf die durch die Antriebsrolle 31′ in Richtung des Pfeils 1′ angetriebene Kreuzspule 1 aufgewickelt. Die Übergabe des Fadens an die Spinnstelle geschieht auf die weiter oben zu Programm Nr. 2 angegebene Art und Weise.The piecing now takes place in the same way as described above for program No. 2. After piecing, the thread is drawn off the take-off roller 39 and wound with the aid of the transmitter 43 onto the cheese 1, which is driven by the drive roller 31 'in the direction of the arrow 1'. The thread is transferred to the spinning station in the manner specified above for program no. 2.

In Fig. 3 ist angedeutet, daß das Anspinnaggregat 23 einen Signalgeber 49 aufweisen kann, der den Spulenrahmen 18 auf Vorhandensein einer leeren Spulenhülse 2 überprüft. Vom Signalgeber 49 aus besteht eine Wirkverbindung 48 zum Schaltmittel 67. Sobald der Signalgeber 49 an einer Spinnstelle eine in den Spulenrahmen eingespannte leere Spulenhülse entdeckt, geht ein Signal an das Schaltmittel 67, das daraufhin das Anhalten des Anspinnaggregats 23 vor der Spinnstelle und das Starten des zweiten Anspinnprogramms veranlaßt.In Fig. 3 it is indicated that the piecing unit 23 can have a signal generator 49, which checks the coil frame 18 for the presence of an empty bobbin tube 2. There is an active connection 48 from the signal transmitter 49 to the switching means 67. As soon as the signal transmitter 49 detects an empty coil sleeve clamped in the coil frame at a spinning position, a signal goes to the switching means 67, which then causes the piecing unit 23 to stop in front of the spinning station and to start the second piecing program.

Die Erfindung ist nicht auf das dargestellte und beschriebene Ausführungsbeispiel eingeschränkt.The invention is not restricted to the exemplary embodiment shown and described.

Das Signal zum Anhalten des Anspinnaggregats 23 vor der Spinnstelle und zum Starten des zweiten Anspinnprogramms kann beispielsweise anläßlich des Empfangs einer leeren Spulenhülse durch die Spinnstelle entweder vom Spulenwechselaggregat 50 oder von der empfangenden Spulstelle ausgelöst und an einen Zentralrechner der OE-Spinnmaschine weitergeleitet werden, der daraufhin dieses Signal zusammen mit einem Identifizierungssignal an das Anspinnaggregat 23 weiterleitet, damit das Anspinnaggregat 23 keine Zeit verliert, zu der zu bedienenden Spinnstelle fahren und die richtige Spinnstelle auch sofort identifizieren kann.The signal for stopping the piecing unit 23 in front of the spinning station and for starting the second piecing program can be triggered, for example, when the spinning station receives an empty bobbin tube, either from the bobbin changing unit 50 or from the receiving bobbin unit and forwarded to a central computer of the OE spinning machine, which thereupon forwards this signal together with an identification signal to the piecing unit 23 so that the piecing unit 23 does not lose any time, can drive to the spinning station to be operated and can also immediately identify the correct spinning station.

Die Signalübermittlung zwischen OE-Spinnmaschine, Spinnstelle, Spulenwechselaggregat und Anspinnaggregat kann berührungslos durch optische oder elektromagnetische Signale, veränderliche elektrische oder magnetische Felder oder dergleichen geschehen. Die Signale können aber auch durch Kontaktgabe, beispielsweise unter Zuhilfenahme elektromechanischer Schalter, übertragen werden.The signal transmission between the OE spinning machine, spinning station, bobbin changing unit and piecing unit can take place without contact by means of optical or electromagnetic signals, variable electrical or magnetic fields or the like. However, the signals can also be transmitted by making contact, for example with the aid of electromechanical switches.

In Fig. 2 ist angedeutet, daß an der OE-Spinnmaschine oder an der Spinnstelle ein Garnlängenzähler 47 angeordnet sein kann. Der Garnlängenzähler 47 bestimmt die aufgelaufene Garnlänge beispielsweise durch Zählen der Umdrehungen der Spultrommel 17. Ist die vorgegebene Garnlänge erreicht, stellt sich der Garnlängenzähler 47 beispielsweise selbsttätig auf Null und ruft auf hier nicht dargestellte Weise das Spulenwechselaggregat 50 zum Spulenwechsel herbei. Gleichzeitig aktiviert er über eine Wirkverbindung 73 einen als Anforderungsknopf 72 ausgebildeten Signalgeber, der seinerseits auf die Schaltmittel 67 eines vorbeifahrenden Anspinnaggregats 23 einwirkt, um das Anspinnaggregat 23 zum Anhalten an der Spinnstelle und zum Auswählen des zweiten Anspinnprogramms zu veranlassen. Ob das Anspinnprogramm auch gleich startet, hängt davon ab, ob inzwischen der Spulenwechsel geschehen ist. Entweder startet das Anspinnprogramm nach dem Ablauf einer vorgegebenen Zeitspanne, oder der Start wird durch einen der weiter oben beschriebenen Signalgeber veranlaßt.In Fig. 2 it is indicated that a yarn length counter 47 can be arranged on the OE spinning machine or at the spinning station. The yarn length counter 47 determines the accumulated yarn length, for example, by counting the revolutions of the winding drum 17. When the predetermined yarn length is reached, the yarn length counter 47 automatically sets itself to zero, for example, and calls the bobbin changing unit 50 to change the bobbin in a manner not shown here. At the same time, via an active connection 73, he activates a button 72 designed as a request button Signal generator which in turn acts on the switching means 67 of a passing piecing unit 23 in order to cause the piecing unit 23 to stop at the spinning position and to select the second piecing program. Whether the piecing program starts immediately depends on whether the bobbin change has taken place in the meantime. Either the piecing program starts after a predetermined period of time has elapsed, or the start is initiated by one of the signal transmitters described above.

Claims (11)

  1. Method for restoring the spinning operation after an interruption at a spinning station (6) of an open end spinning machine, which comprises a plurality of spinning stations (6), which respectively have a spinning element (6'), the spinning machine being equipped with a travelling piecing unit (23) and a bobbin changing unit (50) exchanging a full cross-wound bobbin (1) for an empty tube (2), and by means of the piecing unit (23) with a first piecing programme for removing a yarn breakage which has occurred during the spinning operation, the end of the yarn (8''') being drawn back automatically from the cross-wound bobbin (1), guided to the spinning element (6') of the spinning station (6), laid on spinning fibres present there or supplied to this point, then drawn off continuously as a re-pieced yarn (8') from the spinning element (6'), delivered to the spinning station (6) and wound onto the cross-wound bobbin (1) and with a second piecing programme after the bobbin exchange, in which an auxiliary yarn (33a) is withdrawn from a storage bobbin (23), guided to the spinning element (6') of the spinning station (6) and laid on spinning fibres present there or supplied to this point, then drawn off continuously as a re-pieced yarn (8') from the spinning element (6') and with elimination of the auxiliary yarn piece (33a) guided to the tube (2), delivered to the spinning station (6) and wound continuously on the tube (2) to form a new cross-wound bobbin (1), characterised in that respectively an autonomously travelling piecing unit (23) and an autonomously travelling bobbin changing unit (50) are provided and that on the occasion of a bobbin change carried out by the autonomously travelling bobbin changing unit (50), a signal is initiated, which causes the travelling autonomous piecing unit (23) to stop at the spinning station (6) and to start the second piecing programme.
  2. Method according to Claim 1, characterised in that after the completion of the bobbin change by the bobbin changing unit (50), the signal is initiated, sent to the spinning station (6) and transmitted from the spinning station (6) to the piecing unit (23).
  3. Method according to Claim 1, characterised in that on the occasion of receiving an empty bobbin tube (2), the signal is initiated by the spinning station (6) and sent to the piecing unit (23).
  4. Method according to Claim 1, characterised in that the signal is initiated due to the fact that the piecing unit (23) observes the contents of the bobbin frame and the presence of an empty bobbin tube (2) clamped in the bobbin frame takes occasion to start the second piecing programme and, if the piecing unit (23) is still moving, to stop the latter previously.
  5. Method according to Claim 1, characterised in that the signal is initiated by a yarn length counter (47), which on the occasion of reaching a given yarn length of the cross-wound bobbin (1) and/or on the occasion of the bobbin changing operation caused thereby, is reset to zero.
  6. Method according to Claim 5, characterised in that the piecing unit (23) interrogates the yarn length counter (47) and sets itself to the second piecing programme, if the yarn length counter is at zero.
  7. Device for restoring the spinning operation after an interruption at a spinning station (6) of an open end spinning machine, which comprises a plurality of spinning stations (6), which respectively comprise a spinning element (6'), the spinning machine being equipped with a travelling piecing unit (23) and a bobbin changing unit (50) exchanging a full cross-wound bobbin (1) for an empty tube (2), for carrying out the method according to Claim 1, the piecing unit (23) comprising a first piecing programme and devices (4, 31) able to be operated according to this programme, for removing a yarn breakage which has occurred during the spinning operation, in which the end of the yarn (8''') is drawn back automatically from the cross-wound bobbin (1), guided to the spinning element (6') of the spinning station (6), laid on spinning fibres present there or supplied to this point, then drawn off continuously as a re-pieced yarn (8') from the spinning element (6'), delivered to the spinning station (6) and wound onto the cross-wound bobbin (1), and a second piecing programme after the bobbin exchange and devices (34, 36) able to be operated according to this programme, in which an auxiliary yarn (33a) is withdrawn from a storage bobbin (33), guided to the spinning element (6') of the spinning station (6) and placed on spinning fibres present there or supplied to this point, then drawn off continuously as a re-pieced yarn (8') from the spinning element (6') and guided to the tube (2) with the elimination of the piece of auxiliary yarn (33a), delivered to the spinning station (6) and wound continuously on the tube (2) to form a new cross-wound bobbin (1), as well as switching means (68) able to respond to a yarn breakage or its consequences, for starting the first piecing programme and switching means (67) able to respond to a bobbin change or its cause or its consequences, for starting the second piecing programme, characterised in that respectively an autonomously travelling piecing unit (23) and an autonomously travelling bobbin changing unit (50) are provided and that present on the open end spinning machine, on the bobbin changing unit (50), at the spinning station (6) or on the piecing unit (23) is a signal transmitter (61, 66, 49) able to respond to a bobbin change, its cause or its consequences, which can be brought into working connection (62 to 65) with the switching means (67) for starting the second piecing programme.
  8. Device according to Claim 7, characterised in that the signal transmitter (61) comprises a switch connected to a sequence control device of the bobbin changing unit (50).
  9. Device according to Claim 7, characterised in that the signal transmitter (49) comprises a sensor examining the bobbin frame (18) for the presence of an empty bobbin tube (2) and that the sensor (49) is located on the piecing unit (23).
  10. Device according to Claim 9, characterised in that the open end spinning machine or the spinning station has a yarn length counter (47), which has operating connections (73) to the switching means (67) for selecting and/or starting the second piecing programme, which connections can be activated as soon as the yarn length counter (47) is reset to zero on the occasion of reaching a given yarn length of the cross-wound bobbin (1) and/or on the occasion of the bobbin changing operation caused thereby.
  11. Device according to Claim 10, characterised in that a working connection (73) exists from the yarn length counter (47) to a signal transmitter (72), which can be brought into working connection with the switching means (67) for selecting and/or starting the second piecing programme.
EP89100710A 1988-01-23 1989-01-17 Method and apparatus for restoring a spinning operation after an interruption Expired - Lifetime EP0325992B1 (en)

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DE3801964A DE3801964A1 (en) 1988-01-23 1988-01-23 METHOD AND DEVICE FOR RESTORING SPINNING OPERATION AFTER INTERRUPTION
DE3801964 1988-01-23

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EP0325992A1 EP0325992A1 (en) 1989-08-02
EP0325992B1 true EP0325992B1 (en) 1994-07-27

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US3855771A (en) * 1973-12-05 1974-12-24 Toyoda Automatic Loom Works Device for biasing yarn into fixed position for use with yarn cutting mechanism of automatic doffing apparatus
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DE2506930A1 (en) * 1975-02-19 1976-09-09 Schlafhorst & Co W METHOD FOR FORMATION OF A THREAD RESERVE FROM THE THREAD END OF A TEXTILE SPOOL AND DEVICE FOR CARRYING OUT THE METHOD
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DE2620805C2 (en) * 1976-05-11 1986-02-13 W. Schlafhorst & Co, 4050 Mönchengladbach Method and device for piecing a thread
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DE2641394A1 (en) * 1976-09-15 1978-03-16 Fritz Stahlecker MAINTENANCE DEVICE FOR ONE OR MORE OPEN-END SPINNING MACHINES
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JPS6047937B2 (en) * 1980-10-17 1985-10-24 村田機械株式会社 Spinning device with yarn splicing trolley
DE3123494C2 (en) * 1981-06-13 1992-07-09 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Method and device for winding a newly spun thread onto an empty tube inserted in a winding device
CS224293B1 (en) * 1981-07-31 1984-01-16 Burysek Frantisek Method of and apparatus for restoring spinning process after an automatic bobbin exchange failure or on count change in open-end spinning machines
IT1210503B (en) * 1982-10-12 1989-09-14 Savio Spa OPEN-END TYPE THREADERS. PERFECTED WIRE REFITTING AND SPOOL LEVELING DEVICE FOR
GB2140553B (en) * 1983-05-24 1988-03-23 Rieter Ag Maschf Automat location system
GB2140042B (en) * 1983-05-20 1988-06-08 Rieter Ag Maschf Open-end yarn piecer
CS241603B1 (en) * 1983-10-17 1986-04-17 Pavel Vlcek Apparatus for communication of a spindless spinning unit with movable servicing apparatus
DE3602574C2 (en) * 1986-01-29 1997-06-12 Schlafhorst & Co W Machine producing cross-wound bobbins with a device for forming a thread end reserve on a finished wound bobbin

Also Published As

Publication number Publication date
EP0325992A1 (en) 1989-08-02
DE58908086D1 (en) 1994-09-01
JPH026641A (en) 1990-01-10
JP2792879B2 (en) 1998-09-03
US4920739A (en) 1990-05-01
DE3801964A1 (en) 1989-07-27

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