EP0427044B1 - Method and apparatus for fixing the yarn end to the yarn drum - Google Patents

Method and apparatus for fixing the yarn end to the yarn drum Download PDF

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Publication number
EP0427044B1
EP0427044B1 EP90120359A EP90120359A EP0427044B1 EP 0427044 B1 EP0427044 B1 EP 0427044B1 EP 90120359 A EP90120359 A EP 90120359A EP 90120359 A EP90120359 A EP 90120359A EP 0427044 B1 EP0427044 B1 EP 0427044B1
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EP
European Patent Office
Prior art keywords
sliver
gripper
elements
gripper device
sensor
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EP90120359A
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German (de)
French (fr)
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EP0427044A1 (en
Inventor
Marcel Siegenthaler
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/005—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving
    • D01H9/008—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving for cans

Definitions

  • the invention relates to a method and a device for fixing the sliver end to sliver cans by means of a clamping device, the end of the sliver hanging loosely on the outer jacket of the can and the can being rotatable about its longitudinal axis.
  • sliver cans When operating textile machines, e.g. Spinning machines, sliver cans are continuously filled and emptied. Empty sliver cans are exchanged for full ones and vice versa. Each time a full sliver can is introduced into the processing of the sliver, the end of the sliver must be grasped at the can and inserted into the textile machine.
  • textile machines e.g. Spinning machines
  • a device is known, by means of which a textile band hanging over the edge of a can can be inserted into a fiber band feed device of a spinning machine.
  • This device consists of a swivel arm with a clamp in which the end of the sliver is held. Since in this device the swivel arm is firmly attached to a can changing device and the cans are in turn firmly positioned in a manipulator, the sliver must hang out at a precisely defined point over the edge of the can and / or be inserted manually into the swivel arm and clamped there. This process is labor intensive and hinders the desired automatic sequence of the piecing process.
  • a further device and a method for fixing fiber sliver ends which hang down on the outside of containers is known from the European patent EP-A-69 087.
  • the containers eg sliver cans
  • a catching device for the belt ends is arranged, which can be moved along a partial area of the transport route.
  • the safety gear has sensors by means of which the presence of a band in the area of the safety gear is to be determined.
  • a can is first brought into the area of the catching device and then the can is rotated about the longitudinal axis until a sensor of the catching device directed against the jacket of the container detects the tape.
  • the safety gear must then be moved to the casing at approximately a right angle to the container.
  • the container and safety gear must be moved in the vertical direction relative to each other in order to bring the strap end into the correct gripping position.
  • the band often hangs diagonally, twisted, kinked or in some other way down on the outer jacket of the container. Or there are longitudinal seams or other interfering elements on the container jacket, which the sensor erroneously recognizes as textile tape. In the latter case, the end of the belt cannot be fixed and the jug or the whole process is stopped.
  • the sensor can recognize a belt, but it loses it again when moving vertically, or the clamping elements close next to the belt, since they are moved vertically. This leads to malfunctions and the automatic sequence of the procedure has to be interrupted frequently. It is also possible that a strap end that protrudes too far from the container jacket caught on the outside of the safety gear or the clamping elements and therefore cannot be detected at all. This also leads to business interruptions. Furthermore, the positioning of the safety gear in several steps is time-consuming and requires several drives and control elements, which also increases the susceptibility to faults of the system. This known method is therefore unable to meet the requirements of an automatic operating sequence.
  • the method and the device are intended to make manual auxiliary measures superfluous, enable the automation of the can changing process and reduce the error rate when setting the end of the strip.
  • the main advantages of the invention are the fact that the sliver can hang loosely at any point and in any manner on the outer jacket of the jug. This can be straight, oblique or twisted or at a distance from the jacket.
  • the method according to the invention and the gripping device according to the invention enable a fully automatic and secure gripping or fixing of the fiber sliver.
  • the gripping device is placed on the upper part of the outer jacket of the jug, whereby it is at a vertical height of the jug, which corresponds to the height of the hanging band.
  • the jug is then rotated about its longitudinal axis until the sliver is inserted into the belt clamp of the gripping device by the rotary movement.
  • the sliver is pulled through the band clamp until the end of the band has the desired distance from the gripping device. At this moment the belt clamp is closed and the rotation of the jug is stopped. The sliver end is clamped in the gripping device so that it has the desired position for transfer to the sliver feed device of the textile machine.
  • the relative movements of the can jacket or the hanging fiber sliver relative to the gripping device can be influenced by the fact that the gripping device can be moved on a circular path around the outer jacket of the can in addition to the rotary movement of the can. As a result, the detection of the sliver can be accelerated or delayed, depending on whether the gripping device is moved with or against the direction of rotation of the can.
  • the strap end is pulled through the strap clamps as a result of the relative movements until it has reached the desired position.
  • the end of the tape is found and fixed in the correct position and made available for transfer to the textile machine. Since the clamping elements are directed against the direction of rotation of the can jacket or the fiber sliver and a clamping element lies approximately on the jacket, the fiber sliver is inserted into the clamping elements of the gripping device without sensors or other aids. An additional displacement of the gripping device is not necessary since the end of the band is pulled into the correct position relative to the gripping device by the rotary movement. This simplifies the setting process for the end of the tape and can be carried out more quickly.
  • the object of the invention also serves as a transfer device in that the gripping device, after clamping the sliver, is moved into a transfer position in which the sliver can be transferred to the subsequent textile machine. This transfer position is then independent of the position of the can itself, since the end of the belt is fixed in the gripping device.
  • the method according to the invention and the gripping device thus enable the can changing process to be fully automated.
  • the sliver end can be cut off at the end of the filling process and dropped, whereby it can hang over the edge of the can in any position. Manual additional actions are not necessary since the end of the tape is always found and fixed.
  • the can shown in Figure 1 is filled with sliver 2 and is located on a changing device, not shown, such as a transport vehicle.
  • the can 1 is rotatable about its vertical axis 30.
  • a platform also not shown, is arranged on the transport vehicle, which is rotatable and as a carrier for the Jug 1 is used.
  • the sliver 2 is stored in loops in the can 1 in a known manner, the end 31 of the sliver 2 hanging over the edge of the can 1.
  • a gripping device 3 is arranged, which is connected to a manipulator, not shown. This manipulator makes it possible to move the gripping device along the circular path 5 and to carry out movements in the vertical and horizontal directions.
  • a clamp 6 is arranged, by means of which the sliver 2 can be fixed and held. In the receiving position for the sliver 2, part of the clamp 6 lies against the jacket 4 of the can 1, there being a distance necessary for the movement sequence.
  • the gripping device 3 is shown in a partial section, wherein the rear end of the gripping device 3 is cut away with the connection to the manipulator.
  • two clamping elements 7, 8 are arranged, which are mounted on a common bearing 9 and form the clamp 6.
  • the clamping elements 7, 8 are pivotable about the bearing 9 and can perform pincer-like closing and opening movements.
  • Each of the clamping elements 7, 8 has a clamping surface 17 or 18 at the foremost end, to which an inclined sliding surface 19 or 20 adjoins.
  • the clamping surfaces 17, 18 and the oblique sliding surfaces 19, 20 form an inlet funnel 21 for the sliver 2 and are directed against the direction of rotation 37 of the can 1.
  • the clamping elements 7, 8 are equipped with actuating levers 10, 11 which have active surfaces 12, 13.
  • a cam disk 14 is mounted between the actuating levers 10, 11 and fastened on the motor shaft 15.
  • This cam disc 14 has two switching cams 25, 26 with sliding surfaces 32, 33, the active surfaces 12, 13 of the actuating levers 10, 11 abutting against these sliding surfaces of the cam disc 14.
  • the shaft 15 is through a Drive motor 16 driven, which is connected to a controller, not shown, and is equipped in a known manner with energy supply lines.
  • Each of the clamping elements 7, 8 also has a tab 24, in which a clamping element 22, 23 is suspended in the form of a tension spring.
  • tension springs 22, 23 pull the actuating levers 10, 11 against the cam disk 14 and cause the active surfaces 12, 13 to follow the control surfaces of the cam disk 14.
  • other means such as pneumatic or hydraulic cylinders can also be installed as clamping elements 22, 23. 2
  • the clamping elements 7, 8 are in the widest opening position. The end of a fiber sliver 2 is inserted into the inlet funnel 21 so that it is fixed and clamped between the clamping surfaces 17, 18 after the clamping elements 7, 8 have closed.
  • the side view of the front part of the gripping device 3 shown in FIG. 3, according to FIG. 2, shows the gripping process of the end 31 of the sliver 2.
  • the gripping device 3 is equipped with a sensor 28, which can be, for example, a known proximity sensor.
  • the sensor 28 is connected to the drive motor 16 or its control via a control line 29.
  • the measuring range of the sensor 28 extends in the direction of the axis 34, and the sensor 28 responds as soon as a sliver 2 is inserted into the inlet funnel 21 between open clamping elements 7, 8 of the clamp 6.
  • the sensor 28 When the fiber sliver 2 is inserted, the sensor 28 generates a control signal which sets the drive motor 16, or the terminal 6, ready to close.
  • the sliver 2 is pulled upward by the open clamp 6, after a certain time the end 31 of the sliver 2 reaches the axis 34 of the measuring range of the sensor 28. As soon as the end 31 of the sliver 2 exceeds the axis 34, the sensor 28 generates a second control signal which activates the drive motor 16, whereby the motor shaft 15 and thus the cam disc 14 rotates is, and the switching cams on the cam 14 are actuated. As a result, the clamping elements 7, 8 of the clamp 6 are closed and the sliver is clamped in a position as shown in broken lines in FIG. 3 and identified by the reference numerals 2 'and 31'. This position of the end 31 'of the sliver 2' corresponds to the desired transfer position from which the sliver 2 can be transferred to the take-over device of a textile machine.
  • the cam disk 14 is shown in detail in FIG. 4, the gripping device 3 being cut in the region of the cam disk 14 and being shown from the front.
  • the cam disc 14 is surrounded by a housing 35 of the gripping device 3 and is rotatable in the direction of arrow 36 with the motor shaft 15.
  • the cam disc 14 has two switching cams 25 and 26, which are each provided with a sliding surface 32, 33.
  • the actuating levers 10, 11 of the clamping elements 7, 8 are arranged on both sides of the cam disk 14.
  • the active surfaces 12, 13 are articulated on these actuating levers 10, 11.
  • the clamping elements 7, 8, or the clamp 8 are closed, i.e. the active surfaces 12, 13 of the actuating levers 10, 11 do not touch the sliding surfaces 32, 33 on the cam disk 14.
  • the sliver 2 is fixed in such a way that after filling the can 1, the sliver 2 is severed and the end 31 is loosely suspended at some point over the edge of the can.
  • the end 31 of the sliver 2 is usually at least a hundred millimeters below the edge of the can.
  • the gripping device 3 is now brought into the space around the outer jacket 4 of the jug 1, namely in a plane which is located somewhat below the edge of the jug.
  • the clamp 6 is open and the clamping element 7 is practically at a distance from the outer jacket 4 of the can 1.
  • the jug 1 is now rotated until the sliver 2, which hangs over the jug rim on the outer jacket 4, is inserted into the clamp 6 of the gripping device 3.
  • the sensor 28 responds and sets the gripping device 3 ready for closing.
  • the jug 1 is now rotated further, whereby the sliver 2 is pulled through the clamp 6.
  • the end 31 of the clamping device 3 approaches until a predetermined distance is reached. This is the case when the end 31 passes through the axis 34 of the measuring range of the sensor 28.
  • the sensor 28 generates the control command to close the terminal 6, which is done by turning the cam disk 14.
  • the gripping device 3 can additionally be displaced along the circular path 5, wherein it moves concentrically with the outer casing 4 of the can 1. This enables the sliver 2 to be gripped more quickly when the can 1 is moved in the direction of arrow 37 and the gripping device 3 in the direction of arrow 38.
  • the fixing process of the band end 31 can be delayed by moving the gripping device 3 in the same direction as the arrow 37. It is also evident from the explanations that the advantages of automatically setting the end 31 of the sliver 2 with the aid of the method and device according to the invention are also possible if the can 1 is fixed and only the gripping device 3 is moved along the circular path 5.
  • the method according to the invention and the gripping device can thus be adapted in a simple manner to the needs of various can changing devices and enable a saving in operating time for the fixing of the end 31 of the band 2 and the positioning of this sliver end 31 as well as a considerable reduction in susceptibility to faults.
  • FIG. 5 shows a vertical side view according to FIG. 1.
  • the jug 1 is set up on a turntable 43 and horizontally centered on a cone 52 of the turntable 43 via a conical recess in the bottom of the jug.
  • the turntable 43 is mounted in a frame 42 of a transport vehicle via the rollers 46 and 47.
  • the drive or the rotary movement of the turntable 43 takes place via a friction wheel 44 which rests on the underside of the turntable and is driven by a motor 45 which is mounted on the frame 42 of the vehicle.
  • a friction wheel 44 which rests on the underside of the turntable and is driven by a motor 45 which is mounted on the frame 42 of the vehicle.
  • the gripping device 3 is mounted on a swivel arm 41 so as to be pivotable horizontally about the axis 40 and is in the position shown in FIG. 1 in contact with the outer jacket 4 of the can 1.
  • the swivel arm 41 (not shown) can be mounted on a swivel column of the vehicle and, in addition to its horizontal movement, can carry out a vertical movement to transfer the band to the subsequent receiving device.
  • the motor 45 is connected to a central control 51 via a control line 50, the motor 16 via a control line 48 and the sensor 28 via a line 49.
  • the control takes place as already described above, the motor 45 for driving the turntable 43 being stopped after the triggering of the clamping elements 7, 8 via the motor 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Coiling Of Filamentary Materials In General (AREA)

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Festlegen des Faserbandendes an Faserbandkannen mittels einer Klemmeinrichtung, wobei das Ende des Faserbandes lose am Aussenmantel der Kanne herunterhängt und die Kanne um ihre Längsachse drehbar ist.The invention relates to a method and a device for fixing the sliver end to sliver cans by means of a clamping device, the end of the sliver hanging loosely on the outer jacket of the can and the can being rotatable about its longitudinal axis.

Beim Betrieb von Textilmaschinen, z.B. Spinnmaschinen, werden laufend Faserbandkannen gefüllt und geleert. Dabei werden leere Faserbandkannen gegen volle ausgetauscht und umgekehrt. Bei jedem Einbringen einer vollen Faserbandkanne in den Verarbeitungsprozess des Faserbandes muss das Faserbandende an der Kanne erfasst und in die Textilmaschine eingeführt werden.When operating textile machines, e.g. Spinning machines, sliver cans are continuously filled and emptied. Empty sliver cans are exchanged for full ones and vice versa. Each time a full sliver can is introduced into the processing of the sliver, the end of the sliver must be grasped at the can and inserted into the textile machine.

Aus der Deutschen Patentschrift DE-A-26 46 313 ist eine Vorrichtung bekannt, mittels welcher ein über den Rand einer Kanne hängendes Textilband in eine Faserbandzuführeinrichtung einer Spinnmaschine eingeführt werden kann. Diese Vorrichtung besteht aus einem Schwenkarm mit einer Klemme in welcher das Ende des Faserbandes festgehalten wird. Da bei dieser Vorrichtung der Schwenkarm fest an einer Kannenwechselvorrichtung befestigt und die Kannen ihrerseits fest in einem Manipulator positioniert sind, muss das Faserband an einer genau bestimmten Stelle über den Rand der Kanne heraushängen und/oder manuell in den Schwenkarm eingelegt und dort festgeklemmt werden. Dieser Vorgang ist arbeitsintensiv und behindert den gewünschten automatischen Ablauf des Anspinnvorganges.From the German patent DE-A-26 46 313 a device is known, by means of which a textile band hanging over the edge of a can can be inserted into a fiber band feed device of a spinning machine. This device consists of a swivel arm with a clamp in which the end of the sliver is held. Since in this device the swivel arm is firmly attached to a can changing device and the cans are in turn firmly positioned in a manipulator, the sliver must hang out at a precisely defined point over the edge of the can and / or be inserted manually into the swivel arm and clamped there. This process is labor intensive and hinders the desired automatic sequence of the piecing process.

Eine weitere Vorrichtung und ein Verfahren zum Festlegen von Faserbandenden welche an der Aussenseite von Behältern herunterhängen ist aus der Europäischen Patentschrift EP-A- 69 087 bekannt. Hier werden die Behälter, z.B. Faserbandkannen, auf einer Transportstrecke zwischen verschiedenen Textilmaschinen verschoben. Neben der Transportstrecke ist eine Fangvorrichtung für die Bandenden angeordnet, welche entlang eines Teilbereiches der Transportstrecke verschiebbar ist. Die Fangvorrichtung weist Sensoren auf, mittels welcher das Vorhandensein eines Bandes im Bereiche der Fangvorrichtung festgestellt werden soll. Zum Festlegen des Bandendes wird vorerst eine Kanne in den Bereich der Fangvorrichtung gebracht und dann die Kanne um die Längsachse gedreht bis ein gegen den Mantel des Behälters gerichteter Sensor der Fangvorrichtung das Band erkennt. Anschliessend muss die Fangvorrichtung etwa rechtwinklig zum Behälter an den Mantel herangefahren werden. Zusätzlich müssen Behälter und Fangvorrichtung in vertikaler Richtung relativ zueinander verschoben werden, um das Bandende in die richtige Greifposition zu bringen. Bereits das Erkennen des Bandes mittels des Sensors ist mit Schwierigkeiten verbunden. Das Band hängt häufig schräg, verdreht, abgeknickt oder in anderer Weise am Aussenmantel des Behälters herunter. Oder am Behältermantel sind Längsnähte oder andere Störelemente vorhanden, welche der Sensor irrtümlich als Textilband erkennt. In letzerem Falle kann das Bandende nicht festgelegt werden, und die Kanne oder der ganze Prozess wird gestoppt. Bei schrägem oder abgewinkeltem Band kann der Sensor wohl ein Band erkennen, aber er verliert dieses beim vertikalen Verfahren wieder, oder die Klemmelemente schliessen sich neben dem Band, da sie vertikal verfahren werden. Dadurch treten Störungen auf, und der automatische Ablauf des Verfahrens muss häufig unterbrochen werden. Es ist auch möglich, dass sich ein Bandende, welches zu weit vom Behältermantel absteht, an der Aussenseite der Fangvorrichtung, bzw. der Klemmelemente, verfängt und somit überhaupt nicht erfasst werden kann. Auch dies führt zu Betriebsunterbrüchen. Im weiteren ist das Positionieren der Fangvorrichtung in mehreren Schritten zeitaufwendig und erfordert mehrere Antriebe und Steuerelemente, wodurch die Störanfälligkeit der Anlage ebenfalls erhöht wird. Dieses bekannte Verfahren vermag somit die Anforderungen eines automatischen Betriebsablaufes nicht zu befriedigen.A further device and a method for fixing fiber sliver ends which hang down on the outside of containers is known from the European patent EP-A-69 087. Here the containers, eg sliver cans, are moved on a transport route between different textile machines. In addition to the transport route, a catching device for the belt ends is arranged, which can be moved along a partial area of the transport route. The safety gear has sensors by means of which the presence of a band in the area of the safety gear is to be determined. To fix the strap end, a can is first brought into the area of the catching device and then the can is rotated about the longitudinal axis until a sensor of the catching device directed against the jacket of the container detects the tape. The safety gear must then be moved to the casing at approximately a right angle to the container. In addition, the container and safety gear must be moved in the vertical direction relative to each other in order to bring the strap end into the correct gripping position. Already recognizing the tape by means of the sensor is difficult. The band often hangs diagonally, twisted, kinked or in some other way down on the outer jacket of the container. Or there are longitudinal seams or other interfering elements on the container jacket, which the sensor erroneously recognizes as textile tape. In the latter case, the end of the belt cannot be fixed and the jug or the whole process is stopped. If the belt is inclined or angled, the sensor can recognize a belt, but it loses it again when moving vertically, or the clamping elements close next to the belt, since they are moved vertically. This leads to malfunctions and the automatic sequence of the procedure has to be interrupted frequently. It is also possible that a strap end that protrudes too far from the container jacket caught on the outside of the safety gear or the clamping elements and therefore cannot be detected at all. This also leads to business interruptions. Furthermore, the positioning of the safety gear in several steps is time-consuming and requires several drives and control elements, which also increases the susceptibility to faults of the system. This known method is therefore unable to meet the requirements of an automatic operating sequence.

Es ist Aufgabe der vorliegenden Erfindung, ein Verfahren und eine Vorrichtung zu schaffen, mittels welcher das Faserbandende vollautomatisch und zuverlässig festgelegt und ohne zusätzliche Positionierbewegungen mittels einer Bandgreifeinrichtung automatisch erfasst werden kann. Das Verfahren und die Vorrichtung sollen manuelle Hilfsmassnahmen überflüssig machen, die Automatisierung des Kannenwechselvorganges ermöglichen und die Fehlerquote beim Festlegen des Bandendes reduzieren.It is an object of the present invention to provide a method and a device by means of which the sliver end can be set fully automatically and reliably and can be detected automatically by means of a sliver gripping device without additional positioning movements. The method and the device are intended to make manual auxiliary measures superfluous, enable the automation of the can changing process and reduce the error rate when setting the end of the strip.

Diese Aufgabe wird bei einem Verfahren nach dem Oberbegriff des Patentanspruches 1 erfindungsgemäss durch die kennzeichnenden Merkmale dieses Patentanspruches gelöst und bei einer Greifeinrichtung bzw. einer Vorrichtung nach den Merkmalen des Patentanspruches 6 bzw. 14. Vorteilhafte Weiterbildungen der Erfindung ergeben sich nach den Merkmalen der abhängigen Patentansprüche.This object is achieved according to the invention in a method according to the preamble of patent claim 1 by the characterizing features of this patent claim and in a gripping device or a device according to the features of patent claim 6 or 14. Advantageous further developments of the invention result from the features of the dependent patent claims .

Die wesentlichen Vorteile der Erfindung sind darin zu sehen, dass das Faserband an beliebiger Stelle und in beliebiger Art und Weise lose am Aussenmantel der Kanne herunterhängen kann. Dies kann gerade, schräg oder verdreht oder mit Abstand zum Mantel sein. Das erfindungsgemässe Verfahren und die erfindungsgemässe Greifeinrichtung ermöglichen in jedem Falle ein vollautomatisches und sicheres Ergreifen, bzw. Festlegen des Faserbandes. Die Greifeinrichtung wird an den oberen Teil des Aussenmantels der Kanne angelegt, wodurch sie sich in einer vertikalen Höhe der Kanne befindet, welche der Höhe des herabhängenden Bandes entspricht. Anschliessend wird die Kanne um ihre Längsachse gedreht bis das Faserband durch die Drehbewegung in die Bandklemme der Greifeinrichtung eingelegt wird. Durch zusätzliches Drehen der Kanne wird das Faserband durch die Bandklemme gezogen bis das Bandende den gewünschten Abstand zur Greifeinrichtung aufweist. In diesem Moment wird die Bandklemme geschlossen und die Drehbewegung der Kanne gestoppt. Das Faserbandende wird in der Greifeinrichtung so festgeklemmt, dass es die gewünschte Position zur Uebergabe an die Faserbandzuführeinrichtung der Textilmaschine aufweist. Die Relativbewegungen des Kannenmantels, bzw. des herabhängenden Faserbandes zur Greifeinrichtung lassen sich beeinflussen, indem die Greifeinrichtung zusätzlich zur Drehbewegung der Kanne auf einer Kreisbahn um den Aussenmantel der Kanne verfahrbar ist. Dadurch kann die Erfassung des Faserbandes beschleunigt oder verzögert werden, und zwar abhängig davon, ob die Greifeinrichtung mit oder entgegen der Drehrichtung der Kanne bewegt wird. Auch bei diesen Lösungsvarianten wird das Bandende infolge der Relativbewegungen so lange durch die Bandklemmen gezogen bis es die gewünschte Position erreicht hat. Bei jeder der Lösungsvarianten wird das Bandende gefunden und in der richtigen Position festgelegt und für die Uebergabe an die Textilmaschine bereitgestellt. Da die Klemmelemente gegen die Drehrichtung des Kannenmantels, bzw. des Faserbandes gerichtet sind und ein Klemmelement etwa am Mantel anliegt, wird das Faserband ohne Sensoren oder weitere Hilfsmittel in die Klemmelemente der Greifeinrichtung eingelegt. Ein zusätzliches Verschieben der Greifeinrichtung ist nicht notwendig, da das Bandende durch die Drehbewegung in die richtige Position zur Greifeinrichtung gezogen wird. Dadurch wird der Festlegevorgang für das Bandende vereinfacht und kann schneller durchgeführt werden. Die bei den bekannten Vorrichtungen auftretenden Störungen werden praktisch vollständig vermieden, und das erfindungsgemässe Verfahren und die Vorrichtung führen zu einer höheren Betriebssicherheit und damit Wirtschaftlichkeit. Der Gegenstand der Erfindung dient gleichzeitig als Uebergabeeinrichtung, indem die Greifeinrichtung nach dem Festklemmen des Faserbandes in eine Uebergabeposition verfahren wird, in welcher das Faserband an die nachfolgende Textilmaschine übergeben werden kann. Diese Uebergabeposition ist dann unabhängig von der Position der Kanne selbst, da das Bandende in der Greifeinrichtung festgelegt ist. Das erfindungsgemässe Verfahren und die Greifeinrichtung ermöglichen somit die Vollautomatisierung des Kannenwechselvorganges. Beim Füllen der Kanne kann das Faserbandende am Ende des Füllvorganges abgetrennt und fallengelassen werden, wobei es in beliebiger Position über den Kannenrand hängen kann. Manuelle Zusatzhandlungen sind nicht notwending, da das Bandende in jedem Falle gefunden und festgelegt wird.The main advantages of the invention are the fact that the sliver can hang loosely at any point and in any manner on the outer jacket of the jug. This can be straight, oblique or twisted or at a distance from the jacket. In any case, the method according to the invention and the gripping device according to the invention enable a fully automatic and secure gripping or fixing of the fiber sliver. The gripping device is placed on the upper part of the outer jacket of the jug, whereby it is at a vertical height of the jug, which corresponds to the height of the hanging band. The jug is then rotated about its longitudinal axis until the sliver is inserted into the belt clamp of the gripping device by the rotary movement. By additionally turning the can, the sliver is pulled through the band clamp until the end of the band has the desired distance from the gripping device. At this moment the belt clamp is closed and the rotation of the jug is stopped. The sliver end is clamped in the gripping device so that it has the desired position for transfer to the sliver feed device of the textile machine. The relative movements of the can jacket or the hanging fiber sliver relative to the gripping device can be influenced by the fact that the gripping device can be moved on a circular path around the outer jacket of the can in addition to the rotary movement of the can. As a result, the detection of the sliver can be accelerated or delayed, depending on whether the gripping device is moved with or against the direction of rotation of the can. With these solution variants, too, the strap end is pulled through the strap clamps as a result of the relative movements until it has reached the desired position. In each of the solution variants, the end of the tape is found and fixed in the correct position and made available for transfer to the textile machine. Since the clamping elements are directed against the direction of rotation of the can jacket or the fiber sliver and a clamping element lies approximately on the jacket, the fiber sliver is inserted into the clamping elements of the gripping device without sensors or other aids. An additional displacement of the gripping device is not necessary since the end of the band is pulled into the correct position relative to the gripping device by the rotary movement. This simplifies the setting process for the end of the tape and can be carried out more quickly. The faults occurring in the known devices are practically completely avoided, and the method and the device according to the invention lead to greater operational reliability and therefore economy. The object of the invention also serves as a transfer device in that the gripping device, after clamping the sliver, is moved into a transfer position in which the sliver can be transferred to the subsequent textile machine. This transfer position is then independent of the position of the can itself, since the end of the belt is fixed in the gripping device. The method according to the invention and the gripping device thus enable the can changing process to be fully automated. When filling the can, the sliver end can be cut off at the end of the filling process and dropped, whereby it can hang over the edge of the can in any position. Manual additional actions are not necessary since the end of the tape is always found and fixed.

Im folgenden werden die Erfindung sowie weitere Vorteile und Einzelheiten anhand von Ausführungsbeispielen unter Bezugnahme auf die beiliegenden Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine Aufsicht auf eine Kanne mit einem Faserband und einer Greifeinrichtung in schematischer Darstellung,
Fig. 2
den Vorderteil der Greifeinrichtung mit geöffneten Klemmelementen und eingelegtem Faserband,
Fig. 3
eine Seitenansicht der Greifeinrichtung gemäss Figur 2 und
Fig. 4
eine Querschnitt durch die Greifeinrichtung gemäss Figur 2 im Bereiche der Kurvenscheibe in vereinfachter Darstellung.
Fig. 5
eine Seitenansicht gemäss Figur 1.
The invention and further advantages and details are explained in more detail below on the basis of exemplary embodiments with reference to the accompanying drawings. Show it:
Fig. 1
1 shows a schematic representation of a top view of a jug with a sliver and a gripping device,
Fig. 2
the front part of the gripping device with opened clamping elements and inserted sliver,
Fig. 3
a side view of the gripping device according to Figure 2 and
Fig. 4
a cross section through the gripping device according to Figure 2 in the region of the cam in a simplified representation.
Fig. 5
2 shows a side view according to FIG. 1.

Die in Figur 1 dargestellte Kanne ist mit Faserband 2 gefüllt und befindet sich auf einer nicht dargestellten Wechselvorrichtung, z.B. einem Transportfahrzeug. Die Kanne 1 ist um ihre Vertikalachse 30 drehbar. Dazu ist auf dem Transportfahrzeug eine ebenfalls nicht dargestellte Plattform angeordnet, welche drehbar ist und als Träger für die Kanne 1 dient. Das Faserband 2 ist in bekannter Weise in Schlaufen in der Kanne 1 abgelegt, wobei das Ende 31 des Faserbandes 2 über den Rand der Kanne 1 herunterhängt. Im Raume um den Aussenmantel 4 der Kanne 1 ist eine Greifeinrichtung 3 angeordnet, welche mit einem nicht dargestellten Manipulator verbunden ist. Dieser Manipulator ermöglicht das Verschieben der Greifeinrichtung entlang der Kreisbahn 5 und die Ausführung von Bewegungen in vertikaler und horizontaler Richtung. Am vorderen Ende der Greifeinrichtung 3 ist eine Klemme 6 angeordnet, mittels welcher das Faserband 2 festgelegt und festgehalten werden kann. In der Aufnahmeposition für das Faserband 2 liegt ein Teil der Klemme 6 am Mantel 4 der Kanne 1 an, wobei ein für den Bewegungsablauf notwendiger Abstand vorhanden ist.The can shown in Figure 1 is filled with sliver 2 and is located on a changing device, not shown, such as a transport vehicle. The can 1 is rotatable about its vertical axis 30. For this purpose, a platform, also not shown, is arranged on the transport vehicle, which is rotatable and as a carrier for the Jug 1 is used. The sliver 2 is stored in loops in the can 1 in a known manner, the end 31 of the sliver 2 hanging over the edge of the can 1. In the space around the outer jacket 4 of the can 1, a gripping device 3 is arranged, which is connected to a manipulator, not shown. This manipulator makes it possible to move the gripping device along the circular path 5 and to carry out movements in the vertical and horizontal directions. At the front end of the gripping device 3, a clamp 6 is arranged, by means of which the sliver 2 can be fixed and held. In the receiving position for the sliver 2, part of the clamp 6 lies against the jacket 4 of the can 1, there being a distance necessary for the movement sequence.

In Figur 2 ist die Greifeinrichtung 3 in einem Teilschnitt dargestellt, wobei das hintere Ende der Greifeinrichtung 3 mit der Verbindung zum Manipulator weggeschnitten ist. Am vorderen Ende der Greifeinrichtung 3 sind zwei Klemmelemente 7, 8 angeordnet, welche an einem gemeinsamen Lager 9 gelagert sind und die Klemme 6 bilden. Die Klemmelemente 7, 8 sind um das Lager 9 schwenkbar und können zangenartige Schliess- und Oeffnungsbewegungen ausführen. Jedes der Klemmelemente 7, 8 weist am vordersten Ende eine Klemmfläche 17 bzw. 18 auf, an welche eine schräge Gleitfläche 19 bzw. 20 anschliesst. In geöffnetem Zustande der Klemmelemente 7, 8, bzw. der Klemme 6, bilden die Klemmflächen 17, 18 und die schrägen Gleitflächen 19, 20 einen Einlauftrichter 21 für das Faserband 2 und sind gegen die Drehrichtung 37 der Kanne 1 gerichtet. Am hinteren Ende sind die Klemmelemente 7, 8 mit Betätigungshebeln 10, 11 ausgestattet, welche Wirkflächen 12, 13 aufweisen. Zwischen den Betätigungshebeln 10, 11 ist eine Kurvenscheibe 14 gelagert und auf der Motorwelle 15 befestigt. Diese Kurvenscheibe 14 weist zwei Schaltnocken 25, 26 mit Gleitflächen 32, 33 auf, wobei die Wirkflächen 12, 13 der Betätigungshebel 10, 11 an diesen Gleitflächen der Kurvenscheibe 14 anliegen. Die Welle 15 wird durch einen Antriebsmotor 16 angetrieben, welcher mit einer nicht dargestellten Steuerung verbunden ist und in bekannter Weise mit Energiezuleitungen ausgestattet ist. Jedes der Klemmelemente 7, 8 weist zudem noch eine Lasche 24 auf, in welcher ein Spannelement 22, 23 in Form einer Zugfeder eingehängt ist. Diese Zugfedern 22, 23 ziehen die Betätigungshebel 10, 11 gegen die Kurvenscheibe 14 und bewirken, dass die Wirkflächen 12, 13 den Steuerflächen der Kurvenscheibe 14 folgen. Anstelle der Zugfedern können auch andere Mittel wie pneumatische oder hydraulische Zylinder als Spannelemente 22, 23 eingebaut sein. Gemäss der Darstellung in Fig. 2 befinden sich die Klemmelemente 7, 8 in der weitesten Oeffnungsposition. In den Einlauftrichter 21 ist das Ende eines Faserbandes 2 eingelegt, so dass es nach dem Schliessen der Klemmelemente 7, 8 zwischen den Klemmflächen 17, 18 festgelegt und geklemmt wird.In Figure 2, the gripping device 3 is shown in a partial section, wherein the rear end of the gripping device 3 is cut away with the connection to the manipulator. At the front end of the gripping device 3, two clamping elements 7, 8 are arranged, which are mounted on a common bearing 9 and form the clamp 6. The clamping elements 7, 8 are pivotable about the bearing 9 and can perform pincer-like closing and opening movements. Each of the clamping elements 7, 8 has a clamping surface 17 or 18 at the foremost end, to which an inclined sliding surface 19 or 20 adjoins. In the open state of the clamping elements 7, 8 or the clamp 6, the clamping surfaces 17, 18 and the oblique sliding surfaces 19, 20 form an inlet funnel 21 for the sliver 2 and are directed against the direction of rotation 37 of the can 1. At the rear end, the clamping elements 7, 8 are equipped with actuating levers 10, 11 which have active surfaces 12, 13. A cam disk 14 is mounted between the actuating levers 10, 11 and fastened on the motor shaft 15. This cam disc 14 has two switching cams 25, 26 with sliding surfaces 32, 33, the active surfaces 12, 13 of the actuating levers 10, 11 abutting against these sliding surfaces of the cam disc 14. The shaft 15 is through a Drive motor 16 driven, which is connected to a controller, not shown, and is equipped in a known manner with energy supply lines. Each of the clamping elements 7, 8 also has a tab 24, in which a clamping element 22, 23 is suspended in the form of a tension spring. These tension springs 22, 23 pull the actuating levers 10, 11 against the cam disk 14 and cause the active surfaces 12, 13 to follow the control surfaces of the cam disk 14. Instead of the tension springs, other means such as pneumatic or hydraulic cylinders can also be installed as clamping elements 22, 23. 2, the clamping elements 7, 8 are in the widest opening position. The end of a fiber sliver 2 is inserted into the inlet funnel 21 so that it is fixed and clamped between the clamping surfaces 17, 18 after the clamping elements 7, 8 have closed.

Die in Figur 3 dargestellte Seitenansicht des vorderen Teiles der Greifeinrichtung 3, gemäss Figur 2, zeigt den Greifvorgang des Endes 31 des Faserbandes 2. Die Greifeinrichtung 3 ist mit einem Sensor 28 ausgestattet, wobei es sich beispielsweise um einen bekannten Näherungssenor handeln kann. Der Sensor 28 ist über eine Steuerleitung 29 mit dem Antriebsmotor 16, bzw. dessen Steuerung, verbunden. Der Messbereich des Sensors 28 erstreckt sich in Richtung der Achse 34, und der Sensor 28 spricht an, sobald ein Faserband 2 in den Einlauftrichter 21 zwischen geöffneten Klemmelementen 7, 8 der Klemme 6 eingelegt wird. Bei eingelegtem Faserband 2 erzeugt der Sensor 28 ein Steuersignal, welches den Antriebsmotor 16, bzw. die Klemme 6, in Schliessbereitschaft versetzt. Wird das Faserband 2 durch die geöffnete Klemme 6 nach oben gezogen, so erreicht nach einer bestimmten Zeit das Ende 31 des Faserbandes 2 die Achse 34 des Messbereiches des Sensors 28. Sobald das Ende 31 des Faserbandes 2 die Achse 34 überschreitet, erzeugt der Sensor 28 ein zweites Steuersignal, welches den Antriebsmotor 16 aktiviert, wodurch die Motorwelle 15 und damit die Kurvenscheibe 14 verdreht wird, und die Schaltnocken an der Kurvenscheibe 14 betätigt werden. Dadurch werden die Klemmelemente 7, 8 der Klemme 6 geschlossen, und das Faserband wird in einer Position festgeklemmt, wie es in Figur 3 gestrichelt dargestellt und mit den Bezugszeichen 2' und 31' gekennzeichnet ist. Diese Position des Endes 31' des Faserbandes 2' entspricht der gewünschten Uebergabeposition aus welcher das Faserband 2 an die Uebernahmevorrichtung einer Textilmaschine übergeben werden kann.The side view of the front part of the gripping device 3 shown in FIG. 3, according to FIG. 2, shows the gripping process of the end 31 of the sliver 2. The gripping device 3 is equipped with a sensor 28, which can be, for example, a known proximity sensor. The sensor 28 is connected to the drive motor 16 or its control via a control line 29. The measuring range of the sensor 28 extends in the direction of the axis 34, and the sensor 28 responds as soon as a sliver 2 is inserted into the inlet funnel 21 between open clamping elements 7, 8 of the clamp 6. When the fiber sliver 2 is inserted, the sensor 28 generates a control signal which sets the drive motor 16, or the terminal 6, ready to close. If the sliver 2 is pulled upward by the open clamp 6, after a certain time the end 31 of the sliver 2 reaches the axis 34 of the measuring range of the sensor 28. As soon as the end 31 of the sliver 2 exceeds the axis 34, the sensor 28 generates a second control signal which activates the drive motor 16, whereby the motor shaft 15 and thus the cam disc 14 rotates is, and the switching cams on the cam 14 are actuated. As a result, the clamping elements 7, 8 of the clamp 6 are closed and the sliver is clamped in a position as shown in broken lines in FIG. 3 and identified by the reference numerals 2 'and 31'. This position of the end 31 'of the sliver 2' corresponds to the desired transfer position from which the sliver 2 can be transferred to the take-over device of a textile machine.

In Figur 4 ist die Kurvenscheibe 14 im Detail dargestellt, wobei die Greifeinrichtung 3 im Bereiche der Kurvenscheibe 14 geschnitten und in der Ansicht von vorn dargestellt ist. Die Kurvenscheibe 14 ist von einem Gehäuse 35 der Greifeinrichtung 3 umgeben und ist in Richtung des Pfeiles 36 mit der Motorwelle 15 drehbar. Die Kurvenscheibe 14 weist zwei Schaltnocken 25 und 26 auf, welche je mit einer Gleitfläche 32, 33 versehen sind. Beidseits der Kurvenscheibe 14 sind die Betätigungshebel 10, 11 der Klemmelemente 7, 8 angeordnet. An diesen Betätigungshebeln 10, 11 sind die Wirkflächen 12, 13 angelenkt. In Figur 4 sind die Klemmelemente 7, 8, bzw. die Klemme 8, geschlossen, d.h. die Wirkflächen 12, 13 der Betätigungshebel 10, 11 berühren die Gleitflächen 32, 33 an der Kurvenscheibe 14 nicht. Wird die Kurvenscheibe 14 in Richtung des Pfeiles 36 gedreht, so laufen die Wirkflächen 12, 13 auf den Kurven der beiden Schaltnocken 25 und 26 auf und werden mittels der Gleitflächen 32, 33 nach aussen abgelenkt. Dadurch öffnen sich die Klemmelemente 7, 8 bis sie die maximale Oeffnungsposition erreichen wie sie in Figur 2 dargestellt ist. Diese maximale Oeffnungsposition ist erreicht, wenn die Kurvenscheibe 14 um annähernd 180° verdreht wurde. In dieser Position wird der Antriebsmotor 16 gestoppt und die Greifeinrichtung 3 ist zur Aufnahme eines Faserbandes 2 bereit.The cam disk 14 is shown in detail in FIG. 4, the gripping device 3 being cut in the region of the cam disk 14 and being shown from the front. The cam disc 14 is surrounded by a housing 35 of the gripping device 3 and is rotatable in the direction of arrow 36 with the motor shaft 15. The cam disc 14 has two switching cams 25 and 26, which are each provided with a sliding surface 32, 33. The actuating levers 10, 11 of the clamping elements 7, 8 are arranged on both sides of the cam disk 14. The active surfaces 12, 13 are articulated on these actuating levers 10, 11. In Figure 4, the clamping elements 7, 8, or the clamp 8, are closed, i.e. the active surfaces 12, 13 of the actuating levers 10, 11 do not touch the sliding surfaces 32, 33 on the cam disk 14. If the cam disk 14 is rotated in the direction of the arrow 36, the active surfaces 12, 13 run on the curves of the two switching cams 25 and 26 and are deflected outwards by means of the sliding surfaces 32, 33. As a result, the clamping elements 7, 8 open until they reach the maximum opening position as shown in FIG. 2. This maximum opening position is reached when the cam disc 14 has been rotated by approximately 180 °. In this position, the drive motor 16 is stopped and the gripping device 3 is ready to receive a sliver 2.

Wie aus den Figuren 1 bis 4 erkennbar ist, erfolgt das Festlegen des Faserbandes 2 in der Weise, dass nach dem Füllen der Kanne 1 das Faserband 2 abgetrennt und das Ende 31 an irgend einer Stelle lose über den Kannenrand heruntergehängt wird. Dabei befindet sich das Ende 31 des Faserbandes 2 normalerweise mindestens hundert Millimeter unterhalb des Kannenrandes. Die Greifeinrichtung 3 wird nun in den Raum um den Aussenmantel 4 der Kanne 1 gebracht und zwar in eine Ebene, welche sich etwas unterhalb des Kannenrandes befindet. Dabei ist die Klemme 6 geöffnet und das Klemmelement 7 liegt mit etwas Abstand praktisch am Aussenmantel 4 der Kanne 1 an. Die Kanne 1 wird nun so lange gedreht bis das Faserband 2, welches über den Kannenrand am Aussenmantel 4 herunterhängt, in die Klemme 6 der Greifeinrichtung 3 eingelegt wird. Sobald das Faserband 2 in diesen Bereich gelangt, spricht der Sensor 28 an und versetzt die Greifeinrichtung 3 in Schliessbereitschaft. Die Kanne 1 wird nun weitergedreht wodurch das Faserband 2 durch die Klemme 6 gezogen wird. Dadurch nähert sich das Ende 31 der Klemmeinrichtung 3 bis ein vorbestimmter Abstand erreicht ist. Dies ist dann der Fall, wenn das Ende 31 die Achse 34 des Messbereiches des Sensors 28 durchläuft. In diesem Moment erzeugt der Sensor 28 den Steuerbefehl zum Schliessen der Klemme 6 was durch Drehen der Kurvenscheibe 14 erfolgt. Die Schliessbewegung erfolgt sehr rasch da sich die Betätigungshebel 10, 11 in der Oeffnungsposition der Klemme 6 am äussersten Punkt der Gleitflächen 32, 33 befinden. Sobald die Kurvenscheibe 14 weiter in Richtung des Pfeiles 36 gedreht wird, fallen die Betätigungshebel 10, 11 über die Schaltnocken 25, 26, und die Klemmelemente 7, 8 werden durch die Zugfedern 22, 23 sofort geschlossen. Da der ganze Vorgang relativ rasch abläuft, bewegt sich das Ende 31 des Faserbandes 2 noch bis in die Position 31' wo es dann endgültig festgelegt und festgeklemmt wird. Mit Hilfe des nicht dargestellten Manipulators kann nun das Bandende 31 des Faserbandes 2 in eine vorbestimmte, gewünschte Position im Verhältnis zur Kanne 1 oder zur Textilmaschine, welche die Kanne 1 übernehmen soll, gebracht werden. Der ganze Vorgang kann vollautomatisch ablaufen und bedarf keiner manuellen Hilfseingriffe. Im dargestellten Beispiel ist die Greifeinrichtung 3 zusätzlich entlang der Kreisbahn 5 verschiebbar, wobei sie sich konzentrisch zum Aussenmantel 4 der Kanne 1 bewegt. Dies ermöglicht ein rascheres Erfassen des Faserbandes 2, wenn die Kanne 1 in Richtung des Pfeiles 37 und die Greifeinrichtung 3 in Richtung des Pfeiles 38 bewegt werden. Der Festlegevorgang des Bandendes 31 lässt sich verzögern, indem die Greifeinrichtung 3 in gleicher Richtung wie der Pfeil 37 bewegt wird. Aus den Erläuterungen ist auch offensichtlich, dass die Vorteile des automatischen Festlegens des Endes 31 des Faserbandes 2 mit Hilfe des erfindungsgemässen Verfahrens und der Vorrichtung auch möglich sind wenn die Kanne 1 feststeht und nur die Greifeinrichtung 3 entlang der Kreisbahn 5 bewegt wird. Das erfindungsgemässe Verfahren und die Greifeinrichtung sind somit in einfacher Weise an die Bedürfnisse verschiedener Kannenwechselvorrichtungen anpassbar und ermöglichen eine Einsparung von Betriebszeit für das Festlegen des Endes 31 des Bandes 2 und der Positionierung dieses Faserbandendes 31 sowie eine erhebliche Reduktion der Störanfälligkeit.As can be seen from FIGS. 1 to 4, the sliver 2 is fixed in such a way that after filling the can 1, the sliver 2 is severed and the end 31 is loosely suspended at some point over the edge of the can. The end 31 of the sliver 2 is usually at least a hundred millimeters below the edge of the can. The gripping device 3 is now brought into the space around the outer jacket 4 of the jug 1, namely in a plane which is located somewhat below the edge of the jug. The clamp 6 is open and the clamping element 7 is practically at a distance from the outer jacket 4 of the can 1. The jug 1 is now rotated until the sliver 2, which hangs over the jug rim on the outer jacket 4, is inserted into the clamp 6 of the gripping device 3. As soon as the sliver 2 arrives in this area, the sensor 28 responds and sets the gripping device 3 ready for closing. The jug 1 is now rotated further, whereby the sliver 2 is pulled through the clamp 6. As a result, the end 31 of the clamping device 3 approaches until a predetermined distance is reached. This is the case when the end 31 passes through the axis 34 of the measuring range of the sensor 28. At this moment, the sensor 28 generates the control command to close the terminal 6, which is done by turning the cam disk 14. The closing movement takes place very quickly since the actuating levers 10, 11 are in the open position of the clamp 6 at the outermost point of the sliding surfaces 32, 33. As soon as the cam disk 14 is rotated further in the direction of the arrow 36, the actuating levers 10, 11 drop over the switching cams 25, 26, and the clamping elements 7, 8 are immediately closed by the tension springs 22, 23. Since the whole process takes place relatively quickly, the end 31 of the sliver 2 still moves to the position 31 'where it is finally fixed and clamped. With the aid of the manipulator, not shown, the band end 31 of the fiber band 2 can now be brought into a predetermined, desired position in relation to the can 1 or to the textile machine which the can 1 is to take over. The whole process can run fully automatically and does not require any manual intervention. In the illustrated For example, the gripping device 3 can additionally be displaced along the circular path 5, wherein it moves concentrically with the outer casing 4 of the can 1. This enables the sliver 2 to be gripped more quickly when the can 1 is moved in the direction of arrow 37 and the gripping device 3 in the direction of arrow 38. The fixing process of the band end 31 can be delayed by moving the gripping device 3 in the same direction as the arrow 37. It is also evident from the explanations that the advantages of automatically setting the end 31 of the sliver 2 with the aid of the method and device according to the invention are also possible if the can 1 is fixed and only the gripping device 3 is moved along the circular path 5. The method according to the invention and the gripping device can thus be adapted in a simple manner to the needs of various can changing devices and enable a saving in operating time for the fixing of the end 31 of the band 2 and the positioning of this sliver end 31 as well as a considerable reduction in susceptibility to faults.

Fig.5 zeigt eine vertikale Seitenansicht nach Fig.1. Die Kanne 1 ist auf einem Drehteller 43 aufgestellt und über eine konische Ausnehmung im Kannenboden auf einem Konus 52 des Drehtellers 43 horizontal zentriert.5 shows a vertical side view according to FIG. 1. The jug 1 is set up on a turntable 43 and horizontally centered on a cone 52 of the turntable 43 via a conical recess in the bottom of the jug.

Der Drehteller 43 ist im gezeigten Beispiel in einem Rahmen 42 eines Transportfahrzeuges über die Rollen 46 und 47 gelagert.
Der Antrieb, bzw. die Drehbewegung des Drehtellers 43 erfolgt über ein Reibrad 44, das auf der Unterseite des Drehtellers anliegt und über einen Motor 45 angetrieben wird, der am Rahmen 42 des Fahrzeuges gelagert ist. In Bezug auf diese Ausführung wird auf die frühere Anmeldung der Anmelderin in der Schweiz CH-4014/89-2 vom 7.11.1989 verwiesen.In the example shown, the turntable 43 is mounted in a frame 42 of a transport vehicle via the rollers 46 and 47.
The drive or the rotary movement of the turntable 43 takes place via a friction wheel 44 which rests on the underside of the turntable and is driven by a motor 45 which is mounted on the frame 42 of the vehicle. With regard to this version, reference is made to the applicant's earlier application in Switzerland CH-4014 / 89-2 dated November 7, 1989.

Die Greifeinrichtung 3 ist um die Achse 40 horizontal schwenkbar an einem Schwenkarm 41 gelagert und befindet sich in der gezeigten Stellung entsprechend der Fig.1 in der Anlage am Aussenmantel 4 der Kanne 1.The gripping device 3 is mounted on a swivel arm 41 so as to be pivotable horizontally about the axis 40 and is in the position shown in FIG. 1 in contact with the outer jacket 4 of the can 1.

Der Schwenkarm 41 kann (nicht gezeigt) auf einer Schwenksäule des Fahrzeuges gelagert sein und zusätzlich zu seiner horizontalen Bewegung eine vertikale Bewegung zur Bandübergabe an nachfolgende Aufnahmeeinrichtung ausführen.The swivel arm 41 (not shown) can be mounted on a swivel column of the vehicle and, in addition to its horizontal movement, can carry out a vertical movement to transfer the band to the subsequent receiving device.

Der Motor 45 ist über eine Steuerleitung 50, der Motor 16 über eine Steuerleitung 48 und der Sensor 28 über eine Leitung 49 mit einer zentralen Steuerung 51 verbunden. Die Steuerung erfolgt wie bereits zuvor beschrieben, wobei nach Auslösen der Klemmelemente 7,8 über den Motor 16 der Motor 45 für den Antrieb des Drehtellers 43 stillgesetzt wird.The motor 45 is connected to a central control 51 via a control line 50, the motor 16 via a control line 48 and the sensor 28 via a line 49. The control takes place as already described above, the motor 45 for driving the turntable 43 being stopped after the triggering of the clamping elements 7, 8 via the motor 16.

Claims (15)

  1. A method for fixing the sliver end on sliver cans by means of a gripper device, with the end of the sliver loosely hanging down onto the outer casing of the can and the can being rotatable about its longitudinal axis, characterized in that the gripper device is placed in a receiving position for the sliver on the upper part of the outer casing of the can, the sliver is inserted into a sliver gripper in the gripper device, the existence of the sliver in the sliver gripper is determined by means of a sensor, the sliver is pulled through the sliver gripper by additional rotation of the can, the sliver gripper is closed as soon as the sliver end has a predefined distance from the gripper device and the sliver is fixed and the rotational movement of the can is stopped.
  2. A method as claimed in claim 1, characterized in that during the rotation of the can the gripper device is simultaneously moved around the can casing in the direction of rotation or opposite of the direction of rotation.
  3. A method as claimed in claim 1 or 2, characterized in that after the fixing of the sliver the gripper device is moved to a transfer position for the sliver to a textile machine.
  4. A method as claimed in one of the claims 1 to 3, characterized in that the sensor generates a control instruction for the closing readiness of the gripper as soon as a sliver is inserted into the measuring zone in the vicinity of the sliver gripper.
  5. A method as claimed in one of the claims 1 to 4, characterized in that the sensor generates a control instruction for the drive motor of the sliver grippers when the sliver end passes through the measuring zone in the vicinity of the sliver gripper and the drive motor rotates the motor shaft as a consequence of said control instruction and actuates control cams.
  6. A gripper device for carrying out the method in accordance with claim 1, whereby two gripper elements (7, 8) are swivellably held in a joint bearing (9) and form a gripper (6), each one of the gripper elements (7, 8) comprises an actuating lever (10, 11), said actuating levers (10, 11) are provided with working surfaces (12, 13) and cooperate with a cam disc (14) and the cam disc (14) is attached to a shaft (15) of a drive motor (16) and swivellable by means of said motor (16).
  7. A gripper device as claimed in claim 6, characterized in that the gripper elements (7, 8) in the receiver position for the sliver (2) are directed opposite to the direction of rotation (37) of the can casing (4) and that one of the gripper elements (7, 8) sits close to the outer casing (4) of the can (1).
  8. A gripper device as claimed in claim 6 or 7, characterized in that each one of the gripper elements (7, 8) is provided at the forward end with a gripper surface (17, 18) and an inclined slide surface (19, 20) directly adjacent thereto and that the inclined slide surfaces (19, 20) form an inlet funnel (21) in the opened position of the gripper elements (7, 8).
  9. A gripper device as claimed in one of the claims 6 to 8, characterized in that the gripper elements (7, 8) are connected to tensioning elements (22, 23) and that said tensioning elements (22, 23) press the gripper surfaces (17, 18) against one another.
  10. A gripper device as claimed in one of the claims 6 to 9, characterized in that the cam disc (14) is provided with two control cams (25, 26) arranged symmetrically to the axis.
  11. A gripper device as claimed in one of the claims 6 to 10, characterized in that a sensor (28) for recognizing the sliver (2) is arranged at a distance from the gripping plane (27) of the gripper elements (7, 8).
  12. A gripper device as claimed in one of the claims 6 to 11, characterized in that the sensor (28) comprises a control line (29) to the drive motor (16) and generates control instructions for the drive motor (16).
  13. A gripper device as claimed in one of the claims 6 to 12, characterized in that the gripper device (3) is arranged in a plane approx. rectangular to the can axis and in an area which is adjacent to the can casing (4).
  14. An apparatus for carrying out the method as claimed in claim 1, whereby a rotating apparatus for receiving the can (1) is provided and the rotating apparatus is provided with a swivellable gripper device (3), with the gripper device (3) being provided with at least two clamping elements (7, 8) which are directed opposite of the direction of rotation of the can casing (4) in the receiving position for the sliver (2) and one of the clamping elements (7, 8) sitting close to the outer casing (4) of the can, whereby two clamping elements (7, 8) are swivellably held in a joint bearing (9) and form a clamp (6), each of the clamping elements (7, 8) is provided with an actuating lever (10, 11), said actuating levers (10, 11) are provided with working surfaces (12, 13) and cooperate with a cam disc (14), and the cam disc (14) is attached to the shaft (15) of a drive motor (16) and swivellable by means of said motor (16).
  15. An apparatus as claimed in claim 14, characterized in that the gripper device (3) is provided at a distance from the clamping plane (27) of the clamping elements (7, 8) with at least one sensor (28) for recognizing the sliver (2) and that the sensor (28), the drive for the rotating apparatus as well as the actuating element (16) for the clamping elements (7, 8) are connected via a control device.
EP90120359A 1989-11-07 1990-10-24 Method and apparatus for fixing the yarn end to the yarn drum Expired - Lifetime EP0427044B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4012/89A CH679773A5 (en) 1989-11-07 1989-11-07
CH4012/89 1989-11-07

Publications (2)

Publication Number Publication Date
EP0427044A1 EP0427044A1 (en) 1991-05-15
EP0427044B1 true EP0427044B1 (en) 1993-11-24

Family

ID=4268160

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120359A Expired - Lifetime EP0427044B1 (en) 1989-11-07 1990-10-24 Method and apparatus for fixing the yarn end to the yarn drum

Country Status (6)

Country Link
US (1) US5113550A (en)
EP (1) EP0427044B1 (en)
JP (1) JP2918058B2 (en)
CH (1) CH679773A5 (en)
CS (1) CS544890A3 (en)
DE (1) DE59003610D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19537667C1 (en) * 1995-10-10 1996-10-10 Rosink Gmbh & Co Kg Device for transferring loose end of fibre band into can
DE19547405A1 (en) * 1995-12-19 1997-06-26 Schlafhorst & Co W Rectangular sliver can preparation
DE19936703A1 (en) * 1999-08-04 2001-02-08 Truetzschler Gmbh & Co Kg Device for depositing the sliver on a sliver can, in particular a can with an elongated cross section

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ280383B6 (en) * 1991-09-23 1996-01-17 Rieter Elitex A.S. Device for introducing a reinforced entering point of a fiber sliver into a spinning unit of a rotor spinning machine
FR2684364B1 (en) * 1991-12-03 1995-04-07 Schlumberger Cie METHOD AND DEVICE FOR SEARCHING AND GRIPPING A TAPE, IN PARTICULAR AT THE END, IN A TEXTILE MACHINE.
DE4308606A1 (en) * 1993-03-18 1994-09-22 Rieter Ingolstadt Spinnerei Method and device for sliver separation on a line
DE4335173A1 (en) * 1993-10-15 1995-04-20 Schlafhorst & Co W Can-changing device
DE59502635D1 (en) * 1994-05-13 1998-07-30 Rieter Ingolstadt Spinnerei Method for positioning a sliver end on a filled flat can and device for carrying it out
DE19526891A1 (en) * 1995-07-22 1997-01-23 Schlafhorst & Co W Rectangular sliver can movement
WO2006003679A1 (en) * 2004-06-30 2006-01-12 Ministero Dell'istruzione, Dell'universita'e Della Ricerca Apparatus and method for inserting and pre-feeding a sliver into a spinning unit

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GB962535A (en) * 1963-04-26
DE2646313C2 (en) * 1976-10-14 1986-07-03 W. Schlafhorst & Co, 4050 Mönchengladbach Method and device for replacing sliver cans
IT1108736B (en) * 1978-03-30 1985-12-09 Bulla Beatrice IMPROVEMENT MADE TO VESSEL RACKS FOR THE SUPPLY OF TEXTILE FIBER TAPES TO OPERATING MACHINES
IT1158120B (en) * 1981-06-19 1987-02-18 Savio Spa PROCEDURE AND EQUIPMENT FOR LOADING AN AUTOMATIC RACK AND CONNECTION BETWEEN TEXTILE MACHINES
DE3501875A1 (en) * 1985-01-22 1986-07-24 Fritz 7347 Bad Überkingen Stahlecker METHOD FOR APPLYING A NEW FIBER TAPE IN AN OE-SPINNING DEVICE
DE3616833C2 (en) * 1986-05-17 1996-08-14 Truetzschler Gmbh & Co Kg Method and device for the flying change of spinning cans on spinning preparation machines, in particular draw frames
DE3725265A1 (en) * 1987-07-30 1989-02-09 Zinser Textilmaschinen Gmbh METHOD AND DEVICE FOR CHANGING SPIDER CAN IN A SPINNING PREPARATION MACHINE
DE3802414A1 (en) * 1988-01-28 1989-08-10 Fritz Stahlecker SPINNING MACHINE WITH A VARIETY OF SPINNELS ARRANGED IN ADJUSTMENT
DE3872220T2 (en) * 1988-03-22 1992-12-03 Pettinatura Italiana Spa METHOD AND DEVICE FOR DETECTING AN END OF A TEXTILE FIBER TAPE AND FOR GUIDING THIS END INTO A FEEDING DEVICE FOR A TEXTILE MACHINE.
IT1220881B (en) * 1988-05-02 1990-06-21 Cerit Spa AUTOMATIC BELT DISTRIBUTION DEVICE FOR SPINNING MACHINES
DE3831640A1 (en) * 1988-09-17 1990-03-22 Schlafhorst & Co W AGGREGATE FROM A SPINNING MACHINE AND A DEVICE FOR CHANGING EMPTY FOR FULL CAN
DE3831637A1 (en) * 1988-09-17 1990-04-05 Schlafhorst & Co W AGGREGATE FROM A OE SPINNING MACHINE AND A CAN CHANGING DEVICE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19537667C1 (en) * 1995-10-10 1996-10-10 Rosink Gmbh & Co Kg Device for transferring loose end of fibre band into can
DE19547405A1 (en) * 1995-12-19 1997-06-26 Schlafhorst & Co W Rectangular sliver can preparation
DE19936703A1 (en) * 1999-08-04 2001-02-08 Truetzschler Gmbh & Co Kg Device for depositing the sliver on a sliver can, in particular a can with an elongated cross section

Also Published As

Publication number Publication date
JP2918058B2 (en) 1999-07-12
EP0427044A1 (en) 1991-05-15
CS544890A3 (en) 1992-01-15
US5113550A (en) 1992-05-19
JPH03166169A (en) 1991-07-18
DE59003610D1 (en) 1994-01-05
CH679773A5 (en) 1992-04-15

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