EP0545807B1 - Verfahren und Vorrichtung zum Suchen und Greifen eines Vorgarns, insbesondere an seinem Ende, in einer Textilmaschine - Google Patents

Verfahren und Vorrichtung zum Suchen und Greifen eines Vorgarns, insbesondere an seinem Ende, in einer Textilmaschine Download PDF

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Publication number
EP0545807B1
EP0545807B1 EP19920403236 EP92403236A EP0545807B1 EP 0545807 B1 EP0545807 B1 EP 0545807B1 EP 19920403236 EP19920403236 EP 19920403236 EP 92403236 A EP92403236 A EP 92403236A EP 0545807 B1 EP0545807 B1 EP 0545807B1
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EP
European Patent Office
Prior art keywords
free end
support
roving
clamping fingers
angular position
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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
Application number
EP19920403236
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English (en)
French (fr)
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EP0545807A1 (de
Inventor
Henri Genevray
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N Schlumberger SAS
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N Schlumberger SAS
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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 present invention relates to a method and a device for finding and gripping a ribbon, in particular by its end, in a textile machine.
  • the invention applies in particular, but not exclusively, to the technique of stretching, combing and preparation machines, in which a web is treated which is constituted by a plurality of individual ribbons of fibers arranged side by side and each from a support called a pot.
  • these pots which each contain a continuous ribbon of fibers, are introduced individually into the machine to replace an empty pot, and the ribbon of this full pot hangs freely outside by its free end which is intended to be searched for and then seized with a view to introducing the new ribbon into the ribbon ribbon, replacing the exhausted ribbon.
  • the invention aims to remedy these drawbacks by providing a method and a device which allow a perfect and secure entry of the tape.
  • the invention relates to a method of finding and gripping a ribbon by its end in a textile machine, the ribbon being placed in a support capable of rotating around its vertical axis and having a free end hanging freely outside the support, in which the support is rotated about its axis until the free end of the strip occupies, with respect to this axis, a predetermined angular position, for which it is out of cooperation with pinching fingers belonging to a movable gripping member for transferring said free end, and the rotation of the support for said angular position of the free end is stopped, characterized in that, according to the characterizing part of claim 1, radially the free end of the ribbon relative to said support to bring it into the area of action of said fingers, and the clamping fingers are closed to grip the end l free of the ribbon in the position apart from the latter.
  • the free end of the strip is brought into a predetermined position for its subsequent gripping by the fingers.
  • the detection of the predetermined angular position of the strip and / or the detection of the end of said relative movement are preferably carried out by common means of the optical type.
  • the invention relates to an assembly constituted by a support intended to contain a ribbon and capable of rotating around its vertical axis, and by a device for implementing the above method, comprising first detector means for detecting said predetermined angular position and stopping the rotation of the support for this angular position for which it is out of cooperation with pinching fingers belonging to a movable gripping member for transferring said free end, characterized in that it also comprises spacer means for spreading the free end of the ribbon radially with respect to said support and bringing it into the area of action of said pinching fingers; and means for closing the pinching fingers so as to grasp the free end of the ribbon in the position separated from the latter.
  • the spacer means are constituted by a suction nozzle which is oriented radially towards said support and is located a short distance from the latter, the free end of the ribbon, for said predetermined angular position, being located between this nozzle and the support, and the nozzle being located below the level of the gripping fingers.
  • the nozzle is associated with a radial stop against which the free end of the strip comes to bear in its separated position for its subsequent gripping by the pinching fingers; this stop is for example constituted by a filter and a rigid grid covering the nozzle.
  • the detector means, the pinching fingers and the spacer means are arranged to move vertically along said support, to create a relative movement, in the longitudinal direction of the tape, between the pinching fingers and the free end of the ribbon located in said predetermined angular position, before said spacing movement, so that the pinching fingers are brought to grip the ribbon at a predetermined distance from the end thereof.
  • the detector means can be of the optical type and, in this case, they comprise: a light source oriented radially towards the support, a reflecting surface and a receiver of the reflected beam, these means being arranged for that the incident and / or reflected beam is interrupted by said free end when the latter reaches said predetermined angular position.
  • the reflecting surface is fixed, in which case it is carried by the same support as the light source and the receiver, or the reflecting surface is mobile and it is carried by the peripheral surface of the support, over an appropriate height, facing the light source and receiver.
  • the support has, above the level of the pinching fingers, an outer protruding rim so that the free end of the ribbon hangs being located at a distance from the peripheral surface of the support, the fixed reflecting surface being housed in this space between the free end and the support and being carried by an arm which connects it to the support of the light source.
  • a support or pot 1 which contains a fiber ribbon 2, for example long fibers.
  • This pot is cylindrical with a circular base and it has an open upper end 3 by which the ribbon 2 is taken by traction.
  • the pot 1 is intended to feed by its ribbon 2 a spinning preparation machine, for example a drawing machine in which a plurality of ribbons such as the ribbon 2 are arranged side by side to form a sheet which is treated with appropriately.
  • the ribbon 2 leaves it passing over the edge of the upper opening 3 to present a free end 4 which hangs freely outside the pot.
  • the pot 1 is made to rotate about its vertical axis, by means in themselves known, to bring the free end 4 into a predetermined angular position relative to this axis.
  • the pot 1 is rotated as indicated by the arrows A (Figs. 1 and 2) until the free end 4 occupies the predetermined angular position above, this position preferably being detected optically.
  • the device comprises a light source 5 which is oriented radially towards the pot 1, a reflecting surface 6, and a receiver (not shown in itself, because it is associated with the light source 5) , this receiver being intended to receive the beam 7 reflected by the surface 6 and coming from the incident beam 8.
  • the reflecting surface 6 is fixed and, for this purpose, it is carried by an arm 9 which is integral with the support of the light source 5 and the receiver.
  • the pot 1 has an upper rim or flange 10 which projects radially outwards so that the free end 4, after passing over this rim 10, extends vertically away from the peripheral surface 11 of the pot 1, the reflective surface 6 being located in the immediate vicinity of the peripheral surface 11 so that the free end 4 can be housed, during its rotation along A, between the reflective surface and the light source or the receiver.
  • the outer projection of the rim 10 is less than the projection of a lower rim 12 of the pot so that, when handling the pot, the rim 10 is not damaged.
  • the pot 1 being placed in the machine, it is rotated along its vertical axis, in the direction A, until the free end 4 comes to occupy one of the two positions shown on the Fig. 2 for which it is located between the source 5 and the reflecting surface 6, thereby interrupting the incident or reflected beam 8 7.
  • the free end 4 is preferably in abutment against the arm 9. Because the beam reflected 7 no longer reaches the receiver, the latter emits a signal representative of the presence of the free end 4 in the desired predetermined angular position, which immediately causes the rotation of the pot 1 to stop.
  • the device comprises two fingers pinching 14 which are each articulated around a vertical axis 15 on a support 16 belonging to a movable gripping member 17 which ensures this transfer.
  • the gripping or gripping fingers 14 are located above the detector means and they are arranged to be able to occupy two positions, namely a retracted position (Figs. 1 and 2) for which they are separated from the pot 1 and the free end 4 in the predetermined angular position above, and an active or closed position (Figs. 3 and 4) for which they extend substantially in the radial position relative to the pot 1 and ends in close proximity to the peripheral surface 11 of this one and pinch the free end 4.
  • the free end 4 in its zone of cooperation with the fingers 14, is subjected to a movement of radial spacing with respect to the pot 1 to bring it into the area of action of these fingers, and in particular to bring it closer to the joints 15.
  • a radial spacing movement is visible on examination of FIGS. 2 to 4 in which it can be seen that, from the position of FIG. 2, the free end 4 has been moved radially to the left to approach the joints 15.
  • this spacing movement is obtained by a pneumatic action, and more precisely by a suction using a nozzle 18 which is connected to a suction source (not shown) and which is directed radially towards the support 1, its mouth being situated slightly closer to the pot 1 than the joints 15.
  • a vertical filter and grid 19 cover the mouth of the nozzle 18 and constitute a stop for the free end 4 in the separated position, as best visible in FIG. 3.
  • the nozzle 18 is located vertically below the pinching fingers 14 and above the optical detector means.
  • the pinching fingers 14 it is preferable for the pinching fingers 14 to grasp the free end 4 at a predetermined distance from its free end 20.
  • a relative vertical displacement is created between the pinching fingers 14 and the free end 4, in the longitudinal direction of the ribbon, so that the free end 4 is grasped at a predetermined distance from the free end 20. This is obtained by moving vertically as a single assembly, as shown by arrow B of the Fig. 3, the detector means, the nozzle 18 and the gripping member 17 carrying the gripping fingers 14.
  • the pinching fingers 4 which have a curved cross section, for example round or ovoid, are practically tangent when they are in the closed position, to firmly tighten the ribbon.
  • the length of ribbon remaining under the fingers is defined by the vertical spacing which exists between the pinching fingers and the detector means.
  • this spacing can be variable and adjustable if it is desired to modify the length of tape under the pinching fingers.
  • the invention provides a method and a device which make it possible to grip the free end of the ribbon, in a reliable and simple manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Manipulator (AREA)
  • Replacement Of Web Rolls (AREA)
  • Sewing Machines And Sewing (AREA)

Claims (14)

  1. Verfahren zum Suchen und Greifen eines Vorgarns (2) an seinem Ende in einer Textilmaschine, wobei das Vorgarn in einem um seine vertikale Achse drehbaren Träger (1) angeordnet ist und einen freien Endabschnitt (4) aufweist, welcher frei von dem Träger (1) nach außen hängt, wobei der Träger (1) um seine Achse gedreht wird, bis der freie Endabschnitt (4) des Vorgarns (2) bezüglich dieser Achse eine vorgegebene Winkelposition einnimmt, bei der er außer Engriff mit Greiffingern (14) ist, welche zu einem beweglichen Greiforgan (17) für den Transport des genannten freien Endabschnittes (4) gehören, und wobei die Drehung des Trägers (1) bei der genannten Winkelposition des freien Endabschnittes (4) gestoppt wird, dadurch gekennzeichnet, daß der freie Endabschnitt (4) des Vorgarns bezüglich des genannten Trägers (1) radial versetzt wird, um ihn in den Wirkungsbereich der genannten Finger (14) zu bringen, und daß das Schließen der Greiffinger (14) gesteuert wird, um den freien Endabschnitt (4) des Vorgarns in dessen versetzter Position zu greifen.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der freie Endabschnitt (4) durch pneumatische Einwirkung, insbesondere durch Ansaugen, von dem Träger (1) weg versetzt wird.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der freie Endabschnitt (4) bei seiner Versatzbewegung in eine vorgegebene Radialposition verbracht wird.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß dann, wenn der freie Endabschnitt (4) die genannte vorgegebene Winkelposition erreicht, vor der genannten Versatzbewegung eine Relativverschiebung zwischen den Greiffingern (14) und dem freien Endabschnitt (4) des Vorgarns in Längsrichtung des Vorgarns veranlaßt wird, damit der genannte Wirkungsbereich der Greiffinger (14) in einem vorgegebenen Abstand vom Ende (20) des genannten freien Endabschnittes liegt, wobei diese Relativverschiebung durch ein Absenken der Greiffinger (14) entlang dem genannten freien Endabschnitt (4) erreicht wird.
  5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Erkennung der genannten vorgegebenen Winkelposition und/oder die Erfassung des Endes der genannten Relativverschiebung gemäß Anspruch 4 auf optischem Wege erfolgen.
  6. Anordnung, bestehend aus einem zur Aufnahme eines Vorgarns (2) bestimmten und um seine vertikale Achse drehbaren Träger (1) und einer Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 5, welche erste Detektormittel (5, 6, 13) aufweist, um die genannte vorgegebene Winkelposition zu erkennen und die Drehung des Trägers (1) bei dieser Winkelposition zu stoppen, bei der er außer Wirkeingriff mit den Greiffingern (14) ist, welche zu einem beweglichen Greiforgan (17) für den Transport des genannten freien Endabschnittes (4) gehören, dadurch gekennzeichnet, daß sie zusätzlich Versatzmittel (18) aufweist, um den freien Endabschnitt (4) des Vorgarns bezüglich des Trägers (1) radial zu versetzen und ihn in den Wirkbereich der genannten Greiffinger (14) zu bringen, und daß sie Mittel zum Schließen der Greiffinger (14) aufweist, um den freien Endabschnitt (4) des Vorgarns in dessen Versatzposition zu greifen.
  7. Anordnung nach Anspruch 6, dadurch gekennzeichnet, daß die Versatzmittel durch eine Saugdüse (18) gebildet sind, welche radial zu dem genannten Träger (1) und in geringem Abstand zu diesem ausgerichtet ist, wobei der freie Endabschnitt des Vorgarns in der besagten vorgegebenen Winkelposition zwischen dieser Düse (18) und dem Träger (1) liegt und die Düse (18) unterhalb der Höhe der Greiffinger (14) liegt.
  8. Anordnung nach Anspruch 7, dadurch gekennzeichnet, daß die Düse (18) mit einem radialen Anschlag (19) verbunden ist, gegen den der freie Endabschnitt (4) in seiner Versatzposition im Hinblick auf seine Erfassung durch die Greiffinger (14) zur Anlage kommt.
  9. Anordnung nach Anspruch 8, dadurch gekennzeichnet, daß der Anschlag (19) durch ein Filter und ein die Düse (18) bedeckendes Gitter gebildet ist.
  10. Anordnung nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß die Detektormittel (5, 6, 13), die Greiffinger (14) und die Versatzmittel (18) für eine Vertikalverschiebung entlang dem Träger (1) und dem besagten freien Endabschnitt (4) eingerichtet sind, um eine Relativverschiebung (B) in Längsrichtung des Vorgarns zwischen den Greiffingern (14) und dem genannten freien Endabschnitt (4) in der besagten vorgegebenen Winkelposition vor der besagten Versatzbewegung zu bewirken, damit die Greiffinger (14) veranlaßt werden, das Vorgarn in einem vorbestimmten Abstand vom Ende (20) des Vorgarns zu greifen.
  11. Anordnung nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, daß die Detektormittel von optischer Art sind und eine radial zum Träger gerichtete Lichtquelle (5), eine reflektierende Oberfläche (6, 13) sowie einen Empfänger für den reflektierten Strahl (7) umfassen, wobei diese Detektormittel dazu eingerichtet sind, daß der einfallende (8) und/oder der reflektierte (7) Strahl durch den genannten Endabschnitt (4) unterbrochen wird, wenn dieser in die besagte vorgegebene Winkelposition gelangt.
  12. Anordnung nach Anspruch 11, dadurch gekennzeichnet, daß die reflektierte Oberfläche (6, 13) entweder feststehend ist und von dem gleichen Trägerelement wie die Lichtquelle und der Empfänger getragen wird oder daß sie beweglich ist und von der Umfangsfläche (11) des Trägers (1) in einer geeigneten Höhe bezüglich der Lichtquelle und des Empfängers getragen wird.
  13. Anordnung nach Anspruch 12, dadurch gekennzeichnet, daß der Träger (1) oberhalb der Höhe der Greiffinger (14) eine nach außen vorspringende Randleiste (10) aufweist, damit der genannte Endabschnitt (4) in einem Abstand von der Umfangsfläche (11) des Trägers (1) herunterhängt, wobei die feststehende reflektierende Oberfläche (6) in diesem Raum zwischen dem freien Endabschnitt (4) und dem Träger (11) angeordnet ist, indem sie von einem Arm (9) getragen wird, der sie mit dem Trägerelement der Lichtquelle (5) verbindet.
  14. Anordnung nach einem der Ansprüche 6 bis 13, dadurch gekennzeichnet, daß die Greiffinger (14) einen gekrümmten, insbesondere einen runden oder ovalen,Querschnitt besitzen.
EP19920403236 1991-12-03 1992-12-01 Verfahren und Vorrichtung zum Suchen und Greifen eines Vorgarns, insbesondere an seinem Ende, in einer Textilmaschine Expired - Lifetime EP0545807B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9114942 1991-12-03
FR9114942A FR2684364B1 (fr) 1991-12-03 1991-12-03 Procede et dispositif de recherche et de prehension d'un ruban, notamment par son extremite, dans une machine textile.

Publications (2)

Publication Number Publication Date
EP0545807A1 EP0545807A1 (de) 1993-06-09
EP0545807B1 true EP0545807B1 (de) 1997-02-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920403236 Expired - Lifetime EP0545807B1 (de) 1991-12-03 1992-12-01 Verfahren und Vorrichtung zum Suchen und Greifen eines Vorgarns, insbesondere an seinem Ende, in einer Textilmaschine

Country Status (5)

Country Link
EP (1) EP0545807B1 (de)
JP (1) JP2714917B2 (de)
DE (1) DE69217337T2 (de)
ES (1) ES2097896T3 (de)
FR (1) FR2684364B1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0069087B1 (de) * 1981-06-19 1986-01-15 Officine Savio S.p.A. Verfahren und Vorrichtung zum Beladen eines Gatters und zum Verbinden von faserverarbeitenden Maschinen
DE3725265A1 (de) * 1987-07-30 1989-02-09 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zum wechseln von spinnkannen bei einer spinnereivorbereitungsmaschine
IT1220881B (it) * 1988-05-02 1990-06-21 Cerit Spa Dispositivo di distribuzione automatica di nastro per macchine di filatura
CH679773A5 (de) * 1989-11-07 1992-04-15 Rieter Ag Maschf

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Publication number Publication date
DE69217337T2 (de) 1997-07-10
DE69217337D1 (de) 1997-03-20
EP0545807A1 (de) 1993-06-09
FR2684364B1 (fr) 1995-04-07
ES2097896T3 (es) 1997-04-16
JPH06341026A (ja) 1994-12-13
FR2684364A1 (fr) 1993-06-04
JP2714917B2 (ja) 1998-02-16

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