EP0438439B1 - Thread storage and delivery device - Google Patents

Thread storage and delivery device Download PDF

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Publication number
EP0438439B1
EP0438439B1 EP89911057A EP89911057A EP0438439B1 EP 0438439 B1 EP0438439 B1 EP 0438439B1 EP 89911057 A EP89911057 A EP 89911057A EP 89911057 A EP89911057 A EP 89911057A EP 0438439 B1 EP0438439 B1 EP 0438439B1
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EP
European Patent Office
Prior art keywords
thread
stop element
storage
delivery apparatus
axial
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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EP89911057A
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German (de)
French (fr)
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EP0438439A1 (en
Inventor
Pär JOSEFSSON
Joachim Fritzson
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Iro AB
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Iro AB
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Priority to AT89911057T priority Critical patent/ATE100876T1/en
Publication of EP0438439A1 publication Critical patent/EP0438439A1/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/362—Drum-type weft feeding devices with yarn retaining devices, e.g. stopping pins
    • D03D47/363—Construction or control of the yarn retaining devices
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft

Definitions

  • the invention relates to a thread storage and delivery device of the type specified in the preamble of claim 1.
  • the stop element is arranged with a relatively large axial distance from the last turn of the thread supply near the head end of the storage member.
  • the position of the stop element is chosen in view of the fact that all conceivable thread qualities are to be processed with the thread storage and delivery device, and that with essentially the same length in the thread supply for all thread qualities, even with the coarsest thread, there is still a considerable axial distance between the last turn in the thread supply and the stop element and there is a relatively large angle between the last turn in the thread supply and the section of the thread running from the last thread turn to the stop element.
  • the free end of the thread migrates out of the main nozzle.
  • the cutting device which is assigned to the main nozzle and is intended for all threads and is actuated periodically for the color being processed, cuts off this increase in length.
  • the resulting pieces of thread disrupt in an uncontrollable manner not only in this critical work area, but even get into the fabric, whose quality suffers.
  • the invention has for its object to provide a thread storage and delivery device of the type mentioned, with the malfunctions in thread insertion and quality losses in the finished fabric due to uncontrollable pieces of thread are avoided.
  • the axial distance between the stop element and the last turn of the thread supply can be set so that the oscillating tensile force in the thread is no longer able in the resting phase to detect the last thread turn and if necessary also wind up further thread turns.
  • the effective in the section of the thread between the last turn and the stop element in the axial direction Force component from the tensile force in the thread is no longer sufficient to shift the thread during the resting phase.
  • the embodiment according to claim 2 is useful.
  • the stop element By adjusting the stop element in the axial direction of the storage member, it is possible to limit the maximum permissible value of the angle at which it is ensured that the free end of the thread no longer travels into the cutting device despite the standby pull.
  • the maximum value just allowed means that a collision between the last turn in the thread supply and the Stop element is omitted when working if, after building up the thread supply from the dynamics of the device, the thread supply should execute a trailing movement in the direction of the stop element. There is thus a safety distance between the thread supply and the stop element, which excludes the collision between the thread supply and the stop element, but which is only so large that the free thread end does not migrate out of the main nozzle.
  • the embodiment according to claim 3 is also expedient because, in this dimensioning of the distance, the aforementioned requirements are met in a practical manner.
  • guide values dependent on the thread quality can be determined empirically and specified for the respective setting.
  • a further, expedient embodiment in which the stop element engages in a depression in the storage area of the storage member in the stop position is possible from claim 7. This configuration ensures that the stop element, regardless of its set axial position, penetrates properly into the storage area and reliably intercepts the thread.
  • the safety distance between the last turn and the stop element is predetermined from the start. If the maximum sensor is adjusted to adapt to the respective thread quality, the stop element follows this adjustment movement so that the maximum bar angle of the section of the thread to the stop element or the barely permissible maximum value of the distance between the stop element and the last turn is maintained .
  • the embodiment according to claim 9 is advantageous because, despite the joint adjustability of the maximum sensor and stop element, their relative axial distance can then be readjusted. Because with a small diameter, smooth thread, the safety distance between the last turn and the stop element can be dimensioned smaller than with a large diameter, fluffy thread. The watch can then be adjusted by axially displacing the stop element in relation to the maximum sensor.
  • thread storage and delivery device 1 'of a known type shows a thread storage and delivery device 1 'of a known type, with secondary components being omitted for understanding the function.
  • Such thread storage and delivery devices 1 ' are frequently used for multi-color weaving on jet looms W in order to provide the jet loom W with precisely sized weft thread sections which are drawn off as a continuous thread F from a supply spool (not shown).
  • Each weft thread section is dimensioned by means of a device, not shown, which is integrated into the thread storage and delivery device 1 ' either in the case of a drum-shaped storage element 2 adjustable in outer diameter, a single stop element 13 interrupting the thread take-off when the predetermined thread length is reached, or in the case of a storage element which is not adjustable in outer diameter, has a plurality of stop elements 13 distributed at regular intervals around its circumference for interrupting the thread take-off at a selected stop element 13 .
  • this principle is known, so it is no longer necessary to deal with it here.
  • the thread storage and delivery device 1 has in addition to, e.g. non-rotatably fixed, storage member 2, the axis of which is designated 3 and which defines a storage area 4, a winding element 5 which can be driven to rotate by means of a drive motor 6.
  • the winding element 5 is hollow, so that the thread F coming from the bobbin from the inside along the Axis 3 and directed radially outwards and wound there in successive turns 11 in a thread supply S on the storage surface 4.
  • the drive motor 6 is connected to a control device 7, which in turn is connected via a control line 10 to a maximum and a minimum sensor 8, 9.
  • the minimum sensor 9 can optionally also be omitted.
  • the two sensors 8, 9 are responsible for switching the drive motor 6 on and off, such that when the thread supply S falls below a certain size, the drive motor 6 is switched on until the Maximun sensor 8 detects the required size of the thread supply S and the drive motor 6 switches off again.
  • the individual turns 11 lie side by side.
  • the last turn 11 ' is this Stop element 13 facing, which has a relatively large axial distance A to the thread supply S.
  • the stop element 13 can be moved back and forth between a passive position in which the thread F can be drawn off unhindered and with a circumferential movement around the storage surface 4 and its head end, and a stop position (FIGS. 1 and 2) in which the thread counteracts the circumferential withdrawal movement is prevented and deflected around the stop element 13.
  • a stop position in which the thread counteracts the circumferential withdrawal movement is prevented and deflected around the stop element 13.
  • the thread F On its way to the weaving machine W, the thread F is then deflected back to the axis 3 via the head end of the storage member 2 before it runs through a thread eyelet 14 and from there into a channel 15a of a main nozzle 15 of the weaving machine W.
  • the main nozzle 15 which is connected to a pressure medium supply, is attached to the reed (not shown) at the entrance to the compartment in such a way that it is moved in an oscillating manner with the reed as it moves back and forth (double arrow 17).
  • the main nozzle 15 contains many channels corresponding to the number of colors processed; in the present case, the channel 15a for the thread F and a channel 15b for a second thread F '', which is currently being processed and comes from a thread eyelet 16.
  • the loom W is assigned a number of thread storage and delivery devices 1 'corresponding to the number of colors in multi-color weaving.
  • the thread storage and delivery device 1 'with the color that has not just been processed (thread F) is in a resting phase (FIGS. 1 and 2).
  • the channel 15a is acted upon by a pressure medium flow, which acts on the thread F with a permanent holding pulling force P in the direction of the compartment and keeps it stretched.
  • the free end F 'of the thread F projects over the main nozzle 15 into the area of all processed threads common cutting device 18, which is actuated periodically during the movement of the reed, for example for cutting the thread F ''.
  • the free end F 'of the thread F projects with a length L beyond the main nozzle 15.
  • Fig. 1 shows the beginning of the rest phase of the device 1 '.
  • the other thread F '' is just being inserted.
  • the section 12 of the thread F forms an angle ⁇ with the last winding 11 ′ which is immediately adjacent to the windings 11 in the thread supply S.
  • the standby tensile force P is permanently effective.
  • the stop element 13 is adjustable in the direction of a double arrow 19 in the axial direction of the storage element 2 towards the thread supply S until the axial distance between the stop element 13 and the last turn 11 'has a maximum value A max , at which it is ensured that the angle between the last turn 11' and the section 12 of the thread F only reaches a maximum value ⁇ max at which the axial component from the standby tensile force P is no longer sufficient to wind up the last turn 11 'in the manner described above.
  • the values A max , ⁇ max are dimensioned so large that a collision between the last turn 11 ′ and the stop element 13 is excluded when the thread storage and delivery device 1 is working.
  • the axial position of the last turn 11 ′ is determined depending on the thread quality and the thread length required in the thread supply S, for example by setting the maximum sensor 8.
  • the stop element 13 is then axially adjusted in the direction of the double arrow 19 until the axial distance has the maximum still permissible value A max which reliably prevents the opening of the last turn 11 '.
  • the thread storage and delivery device can then be put into operation.
  • the thread storage and delivery device 1 according to FIG. 3 has the components shown in FIG. 1 and works in the same way with the weaving machine shown in FIG. 1. If the diameter of the storage surface 4 of the storage member 2 is adjustable, a single stop element 13 is sufficient to measure the exact length of the thread section. If, however, the diameter of the storage surface 4 of the storage member 2 is not adjustable in the thread storage and delivery device 1, a plurality of stop elements 13 spaced apart in the circumferential direction are provided, which are expediently combined in an annular body which can be adjusted in the direction of the double arrow 19.
  • the stop element 13 is accommodated in a housing 20 with drive elements, for example a magnet coil and a magnet armature.
  • the housing 20 is housed at a radial distance from the storage surface 4 of the drum-shaped storage member 2 in a stationary housing 21, in one of several sockets 24, of which corresponding bores 23 allow the stop element 13 to exit.
  • the stop element 13 is in its stop position in FIG. 4, in which it enters through a radial gap 27 between the storage surface 4 and the underside of the housing 21 into a recess 25 in the storage member 2.
  • the thread is intercepted from the thread supply S on the stop element 13.
  • the thread supply S is at a distance from the stop element 13 with the maximum value A max according to FIG. 3.
  • the thread supply S there is a thread with a very small diameter, so that the last turn 11 'lies at a considerable axial distance from the right end of the storage area 4.
  • the storage member 2 is provided with a plurality of axially aligned and spaced-apart depressions 25, so that after the housing 20 has been moved into one of the other sockets 24, the stop element 13 again finds a depression 25.
  • the stop element 13 can be adjusted in three stages. However, it is also conceivable to adjust the housing 20 continuously in the housing 21. Then, instead of the three depressions 25, an axial groove 26 which is open toward the storage surface 4 is expedient.
  • the housing 21 is fixed in a holder 22.
  • the maximum sensor 8 indicated in FIG. 3 could be structurally combined with the housing 20 in the housing 21 (FIGS. 4, 5), so that when the maximum sensor 8 is adjusted when changing to a different thread quality, the stop element 13 is also adjusted accordingly .
  • the value A max of the distance between the stop element and the last thread turn 11 or the maximum sensor 8 can then be set in advance. In view of the fact that at different If thread quality the value A max is to be varied, it is then expedient to additionally provide a relative axial adjustability of the stop element 13 to the maximum sensor 8.
  • a stepped or a stepless adjustment of the stop element in the axial direction is shown.
  • the housing 20 could be held displaceably in an axial guide and be adjustable by means of a screw spindle. It would also be conceivable to adjust the housing 20 or the stop element 13 sensitively by means of an eccentric. Corresponding scales, which are visible from the outside, show an exact check of the respective setting.
  • a further possibility for adjusting the stop element 13 consists in attaching the stop element 13 inserted in the form of a pin to a stop element carrier which is longer in the axial direction and which moves with the stop element 13 between its stop position and passive position.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)

Abstract

A thread storage and delivery device for textile machines, in particular for the woof thread of a mechanical loom for weaving in many colours, has a device for limiting the length of measured sections of the thread drawn, a drum-shaped storage element for a stock of wound thread, from which the thread can be drawn over one end of the drum, and at least one stop element axially spaced from the last winding of the stock of thread. The stop element can be moved from a passive position, in which the thread is unwound and drawn past the stop element, to a stopping position, in which the thread under tension is held by the stop element during a pause until the stop element is moved back to the passive position. The axial gap between the last winding (11') of the stock of thread (S) and the stop element (13) can be set on a maximum value (Amax), depending on the quality of the thread, which prevents the thread from a axially wandering during the pause at least in the last winding (11') and in the thread section (12) that extends between the last winding of the stock of thread and the stop element (13).

Description

Die Erfindung betrifft eine Fadenspeicher- und -liefervorrichtung der im Oberbegriff des Patentanspruchs 1 angegebenen Art.The invention relates to a thread storage and delivery device of the type specified in the preamble of claim 1.

Bei bekannten Fadenspeicher- und -liefervorrichtungen dieser Art ist das Stopelement mit relativ großem Axialabstand von der letzten Windung des Fadenvorrats nahe dem Kopfende des Speicherorgans angeordnet. Die Lage des Stopelementes ist im Hinblick darauf gewählt, daß mit der Fadenspeicher- und -liefervorrichtung alle denkbaren Fadenqualitäten verarbeitet werden sollen, und daß bei im wesentlichen für alle Fadenqualitäten gleicher Länge im Fadenvorrat auch beim gröbsten Faden noch ein beträchtlicher axialer Abstand zwischen der letzten Windung im Fadenvorrat und dem Stopelement und ein relativ großer Winkel zwischen der letzten Windung im Fadenvorrat und dem aus der letzten Fadenwindung zum Stopelement verlaufenden Abschnitt des Fadens vorliegt. Im besonderen beim Mehrfarben-Weben auf einer Düsenwebmaschine ist eine Gruppe solcher Fadenspeicher- und -liefervorrichtungen vorgesehen, von denen immer nur eine arbeitet, während die anderen Ruhephasen einhalten. Die Fäden der in ihren Ruhephasen befindlichen Fadenspeicher- und -liefervorrichtungen reichen jedoch immer bis in die Hauptdüse der Webmaschine und werden darin permanent durch eine Druckmittelströmung beaufschlagt und so für den nächsten Eintragvorgang bereitgehalten. Da die Hauptdüse mit dem Riet oszilliert und der Faden von der Bereithalte-Zugkraft belastet ist, wird wegen des großen Winkels zwischen der letzten Windung und dem zum Stopelement verlaufenden Abschnitt des Fadens zumindest die letzte Windung wie bei einer unter Zug gesetzten Schraubenfeder axial aufgezogen. Dadurch entsteht stromab des Stopelements ein Längenzuwachs im Faden. Das freie Ende des Fadens wandert aus der Hauptdüse hinaus. Die der Hauptdüse zugeordnete, für alle Fäden vorgesehene Abschneidvorrichtung, die für die gerade verarbeitete Farbe periodisch betätigt wird, schneidet diesen Längenzuwachs ab. Die anfallenden Fadenstücke stören in unkontrollierbarer Weise nicht nur in diesem kritischen Arbeitsbereich, sondern gelangen sogar in das Gewebe, dessen Qualität leidet.In known thread storage and delivery devices of this type, the stop element is arranged with a relatively large axial distance from the last turn of the thread supply near the head end of the storage member. The position of the stop element is chosen in view of the fact that all conceivable thread qualities are to be processed with the thread storage and delivery device, and that with essentially the same length in the thread supply for all thread qualities, even with the coarsest thread, there is still a considerable axial distance between the last turn in the thread supply and the stop element and there is a relatively large angle between the last turn in the thread supply and the section of the thread running from the last thread turn to the stop element. In particular in the case of multicolor weaving on a jet weaving machine, a group of such thread storage and delivery devices is provided, of which only one is always working while the others are resting. However, the threads of the thread storage and delivery devices which are in their resting phases always reach into the main nozzle of the weaving machine and are constantly acted upon by a pressure medium flow and thus kept ready for the next entry process. Since the main nozzle oscillates with the reed and the thread is loaded by the ready pulling force, Because of the large angle between the last turn and the section of the thread running to the stop element, at least the last turn is pulled open axially as in the case of a helical spring placed under tension. This results in an increase in length in the thread downstream of the stop element. The free end of the thread migrates out of the main nozzle. The cutting device, which is assigned to the main nozzle and is intended for all threads and is actuated periodically for the color being processed, cuts off this increase in length. The resulting pieces of thread disrupt in an uncontrollable manner not only in this critical work area, but even get into the fabric, whose quality suffers.

Der Erfindung liegt die Aufgabe zugrunde, eine Fadenspeicher- und -liefervorrichtung der eingangs genannten Art zu schaffen, mit der Funktionsstörungen beim Fadeneintrag und Qualitätseinbußen im fertigen Gewebe aufgrund unkontrollierbarer Fadenstücke vermieden werden.The invention has for its object to provide a thread storage and delivery device of the type mentioned, with the malfunctions in thread insertion and quality losses in the finished fabric due to uncontrollable pieces of thread are avoided.

Die gestellte Aufgabe wird erfindungsgemäß durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale gelöst.The object is achieved according to the invention by the features specified in the characterizing part of patent claim 1.

Bei dieser Ausbildung läßt sich, z.B. in Abhängigkeit von der Fadenqualität oder vorrichtungsspezifischen Parametern, der axiale Abstand zwischen dem Stopelement und der letzten Windung des Fadenvorrats so einstellen, daß die oszillierende Zugkraft im Faden in der Ruhephase nicht mehr in der Lage ist, die letzte Fadenwindung und gegebenenfalls auch weitere Fadenwindungen aufzuziehen. Die im Abschnitt des Fadens zwischen der letzten Windung und dem Stopelement in axialer Richtung wirksame Kraftkomponente aus der Zugkraft im Faden reicht nicht mehr aus, während der Ruhephase den Faden zu verlagern. Vom freien Ende des Fadens wird in der Ruhephase trotz periodischer Betätigung der Abschneidevorrichtung nichts mehr abgeschnitten, was zu Funktionsstörungen oder Qualitätsverschlechterungen im Gewebe führen könnte.With this design, for example depending on the thread quality or device-specific parameters, the axial distance between the stop element and the last turn of the thread supply can be set so that the oscillating tensile force in the thread is no longer able in the resting phase to detect the last thread turn and if necessary also wind up further thread turns. The effective in the section of the thread between the last turn and the stop element in the axial direction Force component from the tensile force in the thread is no longer sufficient to shift the thread during the resting phase. Despite the periodic actuation of the cutting device, nothing is cut from the free end of the thread in the resting phase, which could lead to malfunctions or deterioration in the quality of the tissue.

Es ist zwar bei einer Fadenspeicher- und -liefervorrichtung mit mehreren mit Zwischenabständen um den Umfang des Speicherorgans verteilten Stopelementen (EP 264985) bekannt, die Stopelemente während des Abziehens und Eintragens des Fadens axial zu verstellen, um trotz der Zwischenabstände zwischen den Stopelementen die eingetragene Fadenlänge stufenlos genau bemessen zu können. Dieses Prinzip läßt jedoch außer acht, was sich in der Ruhephase im Fadenvorrat abspielt und kann keine Anregungen zu einer Lösung des eingangs geschilderten Problems geben.It is known in a thread storage and delivery device with a plurality of stop elements distributed at intervals around the circumference of the storage member (EP 264985) to adjust the stop elements axially while the thread is being pulled off and inserted, in order to maintain the thread length entered despite the intervals between the stop elements to be able to measure continuously and precisely. However, this principle disregards what is happening in the thread supply during the rest phase and cannot provide any suggestions for a solution to the problem described at the beginning.

Da neben der Fadenqualität (Denier-Zahl oder Garnnummer, Fadendurchmesser, Flauschigkeit, Glätte, Haftung, Material, Ausrüstung und dgl.) u.a. auch der Winkel zwischen der letzten Windung und dem zum Stopelement verlaufenden Abschitt für die Aufziehtendenz der letzten Windung verantwortlich ist, weil dieser Winkel die Größe einer axial gerichteten Kraftkomponente aus der Bereithaltezugkraft mitbestimmt, ist die Ausführungsform gemäß Anspruch 2 zweckmäßig. Durch eine Verstellung des Stopelementes in Axialrichtung des Speicherorgans läßt sich nämlich der gerade noch zulässige Maximalwert des Winkels begrenzen, bei dem sichergestellt ist, daß trotz des Bereithaltezugs das freie Ende des Fadens nicht mehr in die Abschneidvorrichtung wandert. Der gerade noch zulässige Maximalwert bedeutet, daß eine Kollision zwischen der letzten Windung im Fadenvorrat und dem Stopelement beim Arbeiten unterbleibt, wenn nach Aufbau des Fadenvorrats aus der Dynamik der Vorrichtung der Fadenvorrat eine Nachlaufbewegung in Richtung zum Stopelement ausführen sollte. Es wird somit ein Sicherheitsabstand zwischen dem Fadenvorrat und dem Stopelement vorgesehen, der die Kollision zwischen dem Fadenvorrat und dem Stopelement ausschließt, der jedoch nur so groß ist, daß das Herauswandern des freien Fadenendes aus der Hauptdüse unterbleibt.Since, in addition to the thread quality (denier number or thread number, thread diameter, fluffiness, smoothness, adhesion, material, equipment and the like), the angle between the last turn and the section running to the stop element is also responsible for the tendency of the last turn to wind up, because this angle determines the size of an axially directed force component from the standby tensile force, the embodiment according to claim 2 is useful. By adjusting the stop element in the axial direction of the storage member, it is possible to limit the maximum permissible value of the angle at which it is ensured that the free end of the thread no longer travels into the cutting device despite the standby pull. The maximum value just allowed means that a collision between the last turn in the thread supply and the Stop element is omitted when working if, after building up the thread supply from the dynamics of the device, the thread supply should execute a trailing movement in the direction of the stop element. There is thus a safety distance between the thread supply and the stop element, which excludes the collision between the thread supply and the stop element, but which is only so large that the free thread end does not migrate out of the main nozzle.

Zweckmäßig ist ferner die Ausführungsform gemäß Anspruch 3, weil bei dieser Bemessung des Abstandes die vorerwähnten Forderungen in praxisbezogener Weise erfüllt werden.The embodiment according to claim 3 is also expedient because, in this dimensioning of the distance, the aforementioned requirements are met in a practical manner.

Alternativ dazu kann auch gemäß Anspruch 4 vorgegangen werden, wobei für den Maximalwert des noch zulässigen Winkels von der Fadenqualität abhängige Richtwerte auf empirischem Weg ermittelt und für die jeweilige Einstellung vorgegeben werden können.As an alternative to this, it is also possible to proceed according to claim 4, wherein for the maximum value of the still permissible angle, guide values dependent on the thread quality can be determined empirically and specified for the respective setting.

Zwei alternative, vorteilhafte Ausführungsformen, bei denen das Stopelement mit Betätigungselementen in einem der Speicherflächen des Speicherorgans mit radialem Abstand gegenüberliegenden, ortsfesten Gehäuse untergebracht ist, sind aus den Ansprüchen 5 und 6 entnehmbar. Für die Verstellung können übliche Verstelleinrichtungen, z.B. eine Grob- und eine Feinverstellvorrichtung, eingesetzt werden, die mit entsprechenden Markierungen und Skalen genauen Aufschluß über die gewählte Stellung des Stopelementes geben.Two alternative, advantageous embodiments, in which the stop element with actuating elements is accommodated in one of the storage surfaces of the storage member with a radial spacing, fixed housing, can be found in claims 5 and 6. Common adjustment devices, e.g. a coarse and a fine adjustment device can be used, which, with appropriate markings and scales, provide precise information about the selected position of the stop element.

Eine weitere, zweckmäßige Ausführungsform, bei der das Stopelement in der Stopstellung in eine Vertiefung in der Speicherfläche des Speicherorgans eingreift, geht aus Anspruch 7 hervor. Bei dieser Ausbildung ist sichergestellt, daß das Stopelement unabhängig von seiner eingestellten Axiallage ordnungsgemäß in die Speicherfläche eindringt und den Faden zuverlässig abfängt.A further, expedient embodiment in which the stop element engages in a depression in the storage area of the storage member in the stop position is possible from claim 7. This configuration ensures that the stop element, regardless of its set axial position, penetrates properly into the storage area and reliably intercepts the thread.

Eine weitere, zweckmäßige Ausführungsform, bei der außerhalb des Speicherorgans ein Maximumsensor für den Fadenvorrat vorgesehen ist, der die axiale Lage der letzten Windung des Fadenvorrats überwacht, geht aus Anspruch 8 hervor. Hierbei ist von vornherein der Sicherheitsabstand zwischen der letzten Windung und dem Stopelement vorgegeben. Wird zur Anpassung an die jeweilige Fadenqualität der Maximumsensor verstellt, so folgt das Stopelement dieser Verstellbewegung, damit der maximal gerade noch zulässige Winkel des Abschnittes des Fadens zum Stopelement bzw. der gerade noch zulässige maximale Wert des Abstandes zwischen den Stopelement und der letzten Windung eingehalten bleibt.A further, expedient embodiment, in which a maximum sensor for the thread supply is provided outside the storage member, which monitors the axial position of the last turn of the thread supply, is evident from claim 8. The safety distance between the last turn and the stop element is predetermined from the start. If the maximum sensor is adjusted to adapt to the respective thread quality, the stop element follows this adjustment movement so that the maximum bar angle of the section of the thread to the stop element or the barely permissible maximum value of the distance between the stop element and the last turn is maintained .

Additiv ist schließlich die Ausführungsform gemäß Anspruch 9 vorteilhaft, weil dann trotz der gemeinsamen Verstellbarkeit von Maximumsensor und Stopelement deren relativer Axialabstand nachjustierbar ist. Denn bei einem kleindurchmeßrigen, glatten Faden kann der Sicherheitsabstand zwischen der letzten Windung und dem Stopelement durchaus kleiner bemessen werden, als bei einem großdurchmeßrigen, flauschigen Faden. Die Wachjustierung läßt sich dann durch eine axiale Versetzung des Stopelementes in Relation zum Maximumsensor vornehmen.Finally, the embodiment according to claim 9 is advantageous because, despite the joint adjustability of the maximum sensor and stop element, their relative axial distance can then be readjusted. Because with a small diameter, smooth thread, the safety distance between the last turn and the stop element can be dimensioned smaller than with a large diameter, fluffy thread. The watch can then be adjusted by axially displacing the stop element in relation to the maximum sensor.

Anhand der Zeichnung wird eine Ausführungsform des Erfindungsgegenstandes erläutert. Es zeigen:

Fig. 1 und 2
eine Fadenspeicher- und--liefervorrichtung bekannter Bauart in zwei Arbeitsphasen und zur Verdeutlichung des erfindungsgemäß zu lösenden Nachteils, jeweils in schematischer Draufsicht,
Fig. 3
eine der Draufsicht der Fig. 1 und 2 entsprechende Draufsicht auf eine erfindungsgemäße Fadenspeicher- und -liefervorrichtung,
Fig. 4
ein Detail zu Fig. 3, in Schnitt und in einer bestimmten Einstellung, und
Fig. 5
das Detail von Fig. 4 in einer anderen Einstellung.
An embodiment of the subject matter of the invention is explained with the aid of the drawing. Show it:
1 and 2
a thread storage and - delivery device of known design in two work phases and to illustrate the disadvantage to be solved according to the invention, each in a schematic plan view,
Fig. 3
1 and 2 corresponding top view of a thread storage and delivery device according to the invention,
Fig. 4
a detail of Fig. 3, in section and in a certain setting, and
Fig. 5
the detail of Fig. 4 in a different setting.

Aus den Fig. 1 und 2 ist eine Fadenspeicher- und -liefervorrichtung 1' bekannter Bauart zu entnehmen, wobei für das Verständnis der Funktion nebensächliche Komponenten weggelassen sind. Solche Fadenspeicher- und -liefervorrichtungen 1' werden häufig zum Mehrfarben-Weben an Düsenwebmaschinen W benutzt, um der Düsenwebmaschine W in der Länge exakt bemessene Schußfadenabschnitte zu liefern, die als durchlaufender Faden F von einer nicht-dargestellten Vorratsspule abgezogen werden. Die Bemessung jedes Schußfadenabschnittes erfolgt mittels einer in die Fadenspeicher- und -liefervorrichtung 1' eingegliederten, nicht-dargestellten Einrichtung, die entweder bei einem im Außendurchmesser verstellbaren, trommelförmigen Speicherorgan 2 ein einziges den Fadenabzug bei Erreichen der vorbestimmten Fadenlänge unterbrechendes Stopelement 13 oder bei einem im Außendurchmesser unverstellbaren Speicherorgan mehrere in regelmäßigen Abständen um dessen Umfangs verteilte Stopelemente 13 zum Unterbrechen des Fadenabzugs an jeweils einem ausgewählten Stopelement 13 aufweist. Dieses Prinzip ist jedoch bekannt, so daß hier nicht mehr darauf einzugehen ist.1 and 2 show a thread storage and delivery device 1 'of a known type, with secondary components being omitted for understanding the function. Such thread storage and delivery devices 1 'are frequently used for multi-color weaving on jet looms W in order to provide the jet loom W with precisely sized weft thread sections which are drawn off as a continuous thread F from a supply spool (not shown). Each weft thread section is dimensioned by means of a device, not shown, which is integrated into the thread storage and delivery device 1 ' either in the case of a drum-shaped storage element 2 adjustable in outer diameter, a single stop element 13 interrupting the thread take-off when the predetermined thread length is reached, or in the case of a storage element which is not adjustable in outer diameter, has a plurality of stop elements 13 distributed at regular intervals around its circumference for interrupting the thread take-off at a selected stop element 13 . However, this principle is known, so it is no longer necessary to deal with it here.

Die Fadenspeicher- und -liefervorrichtung 1' besitzt neben dem, z.B. undrehbar festgelegten, Speicherorgan 2, dessen Achse mit 3 bezeichnet ist und das eine Speicherfläche 4 definiert, ein mittels eines Antriebsmotors 6 zu einer Drehung antreibbares Aufwickelelement 5. Das Wickelelement 5 ist hohl, so daß der von der Spule kommende Faden F von innen entlang der Achse 3 und radial nach außen geleitet und dort in aufeinanderfolgenden Windungen 11 in einem Fadenvorrat S auf die Speicherfläche 4 aufgewickelt wird. Der Antriebsmotor 6 steht mit einer Steuervorrichtung 7 in Verbindung, die ihrerseits über eine Steuerleitung 10 an einen Maximun- und einen Minimumsensor 8, 9 angeschlossen ist. Der Minimumsensor 9 kann gegebenenfalls auch weggelassen werden. Die beiden Sensoren 8, 9 sind für das Einschalten und Ausschalten des Antriebsmotors 6 verantwortlich, derart, daß bei Unterschreiten einer bestimmten Größe des Fadenvorrats S der Antriebsmotor 6 solange eingeschaltet wird, bis der Maximunsensor 8 die erforderliche Größe des Fadenvorrats S feststellt und den Antriebsmotor 6 wieder abschaltet.The thread storage and delivery device 1 'has in addition to, e.g. non-rotatably fixed, storage member 2, the axis of which is designated 3 and which defines a storage area 4, a winding element 5 which can be driven to rotate by means of a drive motor 6. The winding element 5 is hollow, so that the thread F coming from the bobbin from the inside along the Axis 3 and directed radially outwards and wound there in successive turns 11 in a thread supply S on the storage surface 4. The drive motor 6 is connected to a control device 7, which in turn is connected via a control line 10 to a maximum and a minimum sensor 8, 9. The minimum sensor 9 can optionally also be omitted. The two sensors 8, 9 are responsible for switching the drive motor 6 on and off, such that when the thread supply S falls below a certain size, the drive motor 6 is switched on until the Maximun sensor 8 detects the required size of the thread supply S and the drive motor 6 switches off again.

Im Fadenvorrat S liegen die einzelnen Windungen 11 nebeneinander. Die letzte Windung 11' ist dem Stopelement 13 zugewandt, das einen relativ großen axialen Abstand A zum Fadenvorrat S hat.In the thread supply S, the individual turns 11 lie side by side. The last turn 11 'is this Stop element 13 facing, which has a relatively large axial distance A to the thread supply S.

Das Stopelement 13 ist zwischen einer Passivstellung, in der der Faden F ungehindert und mit einer umlaufenden Bewegung um die Speicherfläche 4 und deren Kopfende abgezogen werden kann, und einer Stopstellung (Fig. 1 und 2) hin- und herbewegbar, in der der Faden gegen die umlaufende Abzugsbewegung gehindert und um das Stopelement 13 umgelenkt wird. Auf seinem Weg zur Webmaschine W wird der Faden F dann über das Kopfende des Speicherorgans 2 wieder zur Achse 3 hin abgelenkt, ehe er durch eine Fadenöse 14 und von dieser in einen Kanal 15a einer Hauptdüse 15 der Webmaschine W verläuft. Die Hauptdüse 15, die an eine Druckmittelversorgung angeschlossen ist, ist am nicht-gezeigten Riet am Eingang in das Fach so angebracht, daß sie mit dem Riet bei dessen hin- und hergehender Bewegung oszillierend bewegt wird (Doppelpfeil 17). Die Hauptdüse 15 enthält der Anzahl der verarbeiteten Farben entsprechend viele Kanäle; im vorliegenden Fall den Kanal 15a für den Faden F und einen Kanal 15b für einen zweiten Faden F'', der gerade verarbeitet wird und von einer Fadenöse 16 kommt.The stop element 13 can be moved back and forth between a passive position in which the thread F can be drawn off unhindered and with a circumferential movement around the storage surface 4 and its head end, and a stop position (FIGS. 1 and 2) in which the thread counteracts the circumferential withdrawal movement is prevented and deflected around the stop element 13. On its way to the weaving machine W, the thread F is then deflected back to the axis 3 via the head end of the storage member 2 before it runs through a thread eyelet 14 and from there into a channel 15a of a main nozzle 15 of the weaving machine W. The main nozzle 15, which is connected to a pressure medium supply, is attached to the reed (not shown) at the entrance to the compartment in such a way that it is moved in an oscillating manner with the reed as it moves back and forth (double arrow 17). The main nozzle 15 contains many channels corresponding to the number of colors processed; in the present case, the channel 15a for the thread F and a channel 15b for a second thread F '', which is currently being processed and comes from a thread eyelet 16.

Der Webmaschine W sind beim Mehrfarbenweben der Anzahl der Farben entsprechend viele Fadenspeicher- und -liefervorrichtungen 1' zugeordnet. Die Fadenspeicher- und -liefervorrichtung 1' mit der gerade nicht verarbeiteten Farbe (Faden F) befindet sich in einer Ruhephase (Fig.1 und 2). In der Ruhephase wird der Kanal 15a mit einer Druckmittelströmung beaufschlagt, die den Faden F mit einer permanenten Bereithalte-Zugkraft P in Richtung in das Fach beaufschlagt und gestreckt hält. Dabei ragt das freie Ende F' des Fadens F über die Hauptdüse 15 bis in den Bereich einer allen verarbeiteten Fäden gemeinsamen Abschneidvorrichtung 18, die bei der Bewegung des Riets periodisch betätigt wird, z.B. für das Abschneiden des Fadens F''. Das freie ende F' des Fadens F ragt mit einer Länge L über die Hauptdüse 15 hinaus.The loom W is assigned a number of thread storage and delivery devices 1 'corresponding to the number of colors in multi-color weaving. The thread storage and delivery device 1 'with the color that has not just been processed (thread F) is in a resting phase (FIGS. 1 and 2). In the rest phase, the channel 15a is acted upon by a pressure medium flow, which acts on the thread F with a permanent holding pulling force P in the direction of the compartment and keeps it stretched. The free end F 'of the thread F projects over the main nozzle 15 into the area of all processed threads common cutting device 18, which is actuated periodically during the movement of the reed, for example for cutting the thread F ''. The free end F 'of the thread F projects with a length L beyond the main nozzle 15.

Fig. 1 zeigt den Beginn der Ruhephase der Vorrichtung 1'. Der andere Faden F'' wird gerade eingetragen. Der Abschnitt 12 des Fadens F schließt mit der den Windungen 11 im Fadenvorrat S unmittelbar benachbarten letzten Windung 11' einen Winkel α ein. Die Bereithaltezugkraft P ist permanent wirksam.Fig. 1 shows the beginning of the rest phase of the device 1 '. The other thread F '' is just being inserted. The section 12 of the thread F forms an angle α with the last winding 11 ′ which is immediately adjacent to the windings 11 in the thread supply S. The standby tensile force P is permanently effective.

Aufgrund der Bereithaltezugkraft P und wegen der oszillierenden Bewegung (Doppelpfeil 17) der Hauptdüse 15 wird im Faden F eine axial gerichtete Kraftkomponente aus der Bereithaltezugkraft und deren Oszillation wirksam, die gemäß Fig. 2 zumindest die letzte Windung 11' allmählich aufzuziehen beginnt, ähnlich einer unter axiale Zugbelastung gesetzten Schraubenfeder. Ein überwiegender Teil zumindest der letzten Windung 11' beginnt allmählich in Richtung zum Stopelement 13 hinzuwandern. Aufgrund dieser Wanderbewegung und weil sich der Knick zwischen dem Abschnitt 12 und der letzten Windung 11' zu einer (in der Abwicklung der Speicherfläche 4) im wesentlichen geraden Linie streckt, wandert das freie Ende F' des Fadens F weiter aus der Hauptdüse 15 in das Fach hinein, und zwar um ein Maß L1. Dieser Längenzuwachs bewirkt aber, daß bei der nächsten Betätigung der Abschneidvorrichtung 18 zum Ablängen eines Abschnittes des gerade verarbeiteten Fadens F'' ein Stück x des Fadens F abgeschnitten wird, das frei herabfällt oder in das Fach hineingetragen wird. Diese freien Fadenstücke x fallen von jedem Faden während der Ruhephase an, was allmählich zu einer starken Verschmutzung im Eintrageinlaß und zu unkontrollierbaren Fehlern im Gewebe führt.Due to the standby tensile force P and due to the oscillating movement (double arrow 17) of the main nozzle 15, an axially directed force component from the standby tensile force and its oscillation becomes effective in the thread F, which, according to FIG. 2, begins to gradually pull up at least the last turn 11 ', similar to one below axial tensile load set coil spring. A predominant part of at least the last turn 11 'gradually begins to migrate towards the stop element 13. Because of this migration and because the kink between the section 12 and the last turn 11 'extends to a (in the development of the storage area 4) substantially straight line, the free end F' of the thread F moves further from the main nozzle 15 into the Compartment, by a dimension L1. However, this increase in length causes the next actuation of the cutting device 18 to cut a section of the thread F '' just processed to cut off a piece x of the thread F which falls freely or is carried into the compartment. These free pieces of thread x accumulate from each thread during the resting phase, which gradually becomes a strong one Contamination in the entry inlet and leads to uncontrollable errors in the tissue.

Die Erzeugung dieser unerwünschten und unkontrollierbar anfallenden Fadenstücke x wird erfindungsgemäß bei einer Fadenspeicher- und -liefervorrichtung 1 gemäß Fig. 3 dadurch vermieden, daß das Stopelement 13 in Richtung eines Doppelpfeiles 19 in axialer Richtung des Speicherorgans 2 zum Fadenvorrat S hin verstellbar ist, bis der axiale Abstand zwischen dem Stopelement 13 und der letzten Windung 11' einen maximalen Wert Amax hat, bei dem sichergestellt ist, daß der Winkel zwischen der letzten Windung 11' und dem Abschnitt 12 des Fadens F nur einen maximalen Wert αmax erreicht, bei den die axiale Komponente aus der Bereithaltezugkraft P nicht mehr ausreicht, die letzte Windung 11' in der vorbeschriebenen Weise aufzuziehen. Andererseits sind die Werte Amax, αmax so groß bemessen, daß beim Arbeiten der Fadenspeicher- und -liefervorrichtung 1 eine Kollision zwischen der letzten Windung 11' und dem Stopelement 13 ausgeschlossen ist.The generation of these undesirable and uncontrollably occurring thread pieces x is avoided according to the invention in a thread storage and delivery device 1 according to FIG. 3 in that the stop element 13 is adjustable in the direction of a double arrow 19 in the axial direction of the storage element 2 towards the thread supply S until the axial distance between the stop element 13 and the last turn 11 'has a maximum value A max , at which it is ensured that the angle between the last turn 11' and the section 12 of the thread F only reaches a maximum value α max at which the axial component from the standby tensile force P is no longer sufficient to wind up the last turn 11 'in the manner described above. On the other hand, the values A max , α max are dimensioned so large that a collision between the last turn 11 ′ and the stop element 13 is excluded when the thread storage and delivery device 1 is working.

Zur Einstellung der Fadenspeicher- und -liefervorrichtung 1 gemäß Fig. 3 wird in Abhängigkeit von der Fadenqualität und der im Fadenvorrat S benötigten Fadenlänge die axiale Lage der letzten Windung 11', z.B. durch Einstellen des Maximumsensors 8, festgelegt. Danach wird das Stopelement 13 in Richtung des Doppelpfeiles 19 axial soweit verstellt, bis der axiale Abstand den das Aufziehen der letzten Windung 11' mit Sicherheit unterbindenden, maximal noch zulässigen Wert Amax hat. Danach kann die Fadenspeicher- und -liefervorrichtung in Betrieb genommen werden.To set the thread storage and delivery device 1 according to FIG. 3, the axial position of the last turn 11 ′ is determined depending on the thread quality and the thread length required in the thread supply S, for example by setting the maximum sensor 8. The stop element 13 is then axially adjusted in the direction of the double arrow 19 until the axial distance has the maximum still permissible value A max which reliably prevents the opening of the last turn 11 '. The thread storage and delivery device can then be put into operation.

Die Fadenspeicher- und -liefervorrichtung 1 gemäß Fig. 3 besitzt die in Fig. 1 gezeigten Komponenten und arbeitet mit der in Fig. 1 gezeigten Webmaschine auf dieselbe Weise zusammen. Sofern der Durchmesser der Speicherfläche 4 des Speicherorgans 2 verstellbar ist, reicht zum Bemessen der exakten Fadenabschnittslänge ein einziges Stopelement 13 aus. Ist hingegen bei der Fadenspeicher- und -liefervorrichtung 1 der Durchmesser der Speicherfläche 4 des Speicherorgans 2 nicht verstellbar, so wird eine Vielzahl in Umfangsrichtung beabstandeter Stopelemente 13 vorgesehen, die zweckmäßigerweise in einem Ringkörper zusammengefaßt sind, der sich in Richtung des Doppelpfeiles 19 verstellen läßt.The thread storage and delivery device 1 according to FIG. 3 has the components shown in FIG. 1 and works in the same way with the weaving machine shown in FIG. 1. If the diameter of the storage surface 4 of the storage member 2 is adjustable, a single stop element 13 is sufficient to measure the exact length of the thread section. If, however, the diameter of the storage surface 4 of the storage member 2 is not adjustable in the thread storage and delivery device 1, a plurality of stop elements 13 spaced apart in the circumferential direction are provided, which are expediently combined in an annular body which can be adjusted in the direction of the double arrow 19.

Die Fig. 4 und 5 verdeutlichen die Verstellbarkeit des Stopelementes 13 bei der Ausführungsform der Fig. 3. Das Stopelement 13 ist mit Antriebselementen, z.B. einer Magnetspule und einem Magnetanker in einem Gehäuse 20 untergebracht. Das Gehäuse 20 ist in radialem Abstand von der Speicherfläche 4 des trommelförmigen Speicherorgans 2 in einem ortsfesten Gehäuse 21 untergebracht, und zwar in einer von mehreren Fassungen 24, von denen entsprechende Bohrungen 23 den Austritt des Stopelementes 13 zulassen. Das Stopelement 13 ist in Fig. 4 in seiner Stopstellung, in der es durch einen radialen Spalt 27 zwischen der Speicherfläche 4 und der Unterseite des Gehäuses 21 bis in eine Vertiefung 25 im Speicherorgan 2 eintritt. Es ist der Faden aus dem Fadenvorrat S am Stopelement 13 abgefangen. Der Fadenvorrat S hat vom Stopelement 13 den Abstand mit dem maximalen Wert Amax gemäß Fig.3. Im Fadenvorrat S liegt hier ein Faden mit sehr kleinem Durchmesser vor, so daß die letzte Windung 11' in beträchlichem axialen Abstand vom rechten Ende der Speicherfläche 4 liegt.4 and 5 illustrate the adjustability of the stop element 13 in the embodiment of FIG. 3. The stop element 13 is accommodated in a housing 20 with drive elements, for example a magnet coil and a magnet armature. The housing 20 is housed at a radial distance from the storage surface 4 of the drum-shaped storage member 2 in a stationary housing 21, in one of several sockets 24, of which corresponding bores 23 allow the stop element 13 to exit. The stop element 13 is in its stop position in FIG. 4, in which it enters through a radial gap 27 between the storage surface 4 and the underside of the housing 21 into a recess 25 in the storage member 2. The thread is intercepted from the thread supply S on the stop element 13. The thread supply S is at a distance from the stop element 13 with the maximum value A max according to FIG. 3. In the thread supply S there is a thread with a very small diameter, so that the last turn 11 'lies at a considerable axial distance from the right end of the storage area 4.

Das Speicherorgan 2 ist mit mehreren in axialer Richtung aufeinander ausgerichteten und beabstandeten Vertiefungen 25 versehen, so daß nach Umsetzen des Gehäuses 20 in eine der anderen Fassungen 24 das Stopelement 13 jeweils wieder eine Vertiefung 25 vorfindet. Bei der Ausführungsform der Fig. 4 und 5 läßt sich das Stopelement 13 in drei Stufen verstellen. Es ist jedoch auch denkbar, das Gehäuse 20 im Gehäuse 21 stufenlos zu verstellen. Dann ist anstelle der drei Vertiefungen 25 eine axiale und zur Speicherfläche 4 hin offene Nut 26 zweckmäßig. Das Gehäuse 21 ist in einer Halterung 22 festgelegt.The storage member 2 is provided with a plurality of axially aligned and spaced-apart depressions 25, so that after the housing 20 has been moved into one of the other sockets 24, the stop element 13 again finds a depression 25. In the embodiment of FIGS. 4 and 5, the stop element 13 can be adjusted in three stages. However, it is also conceivable to adjust the housing 20 continuously in the housing 21. Then, instead of the three depressions 25, an axial groove 26 which is open toward the storage surface 4 is expedient. The housing 21 is fixed in a holder 22.

Denkbar ist ferner, anstelle des Gehäuses 20 das Gehäuse 21 selbst in der Halterung 22 in axialer Richtung zu verstellen, was die Ausnehmung 28 in der Halterung 22 zuläßt.It is also conceivable to adjust the housing 21 itself in the holder 22 in the axial direction instead of the housing 20, which allows the recess 28 in the holder 22.

In Fig. 5 ist im Fadenvorrat S ein dickerer Faden mit seinem Windungen 11 und der letzten Windung 11' vorgesehen. Damit wiederum der maximale Wert Amax für den Abstand zwischen der letzten Windung 11' und dem Stopelement 13 eingehalten wird, ist das Gehäuse 20 im Gehäuse 21 nach rechts versetzt worden.5, a thicker thread with its turns 11 and the last turn 11 'is provided in the thread supply S. So that the maximum value A max for the distance between the last turn 11 ′ and the stop element 13 is again maintained, the housing 20 in the housing 21 has been moved to the right.

Der in Fig. 3 angedeutete Maximumsensor 8 könnte mit dem Gehäuse 20 im Gehäuse 21 (Fig. 4, 5) baulich vereinigt werden, so daß bei der bei Umstellung auf eine andere Fadenqualität notwendigen Verstellung des Maximumsensors 8 gleichzeitig auch das Stopelement 13 entsprechend verstellt wird. Der Wert Amax des Abstandes zwischen dem Stopelement und der letzten Fadenwindung 11 bzw. dem Maximumsensor 8 kann dann vor vornherein festgesetzt sein. Im Hinblick darauf, daß bei unterschiedlichen Fadenqualitäten der Wert Amax variiert werden soll, ist es dann zweckmäßig, zusätzlich eine relative axiale Verstellbarkeit des Stopelementes 13 zum Maximumsensor 8 vorzusehen.The maximum sensor 8 indicated in FIG. 3 could be structurally combined with the housing 20 in the housing 21 (FIGS. 4, 5), so that when the maximum sensor 8 is adjusted when changing to a different thread quality, the stop element 13 is also adjusted accordingly . The value A max of the distance between the stop element and the last thread turn 11 or the maximum sensor 8 can then be set in advance. In view of the fact that at different If thread quality the value A max is to be varied, it is then expedient to additionally provide a relative axial adjustability of the stop element 13 to the maximum sensor 8.

In den Fig. 4 und 5 ist eine abgestufte oder eine stufenlose Verstellung des Stopelementes in axialer Richtung gezeigt. Im Hinblick auf eine feinfühlige Verstellung des Stopelementes könnte das Gehäuse 20 in einer Axialführung verschiebbar gehalten und mittels einer Schraubspindel verstellbar sein. Denkbar wäre es ferner, das Gehäuse 20 bzw. das Stopelement 13 mittels eines Exzenters feinfühlig zu verstellen. Entsprechende Skalen, die von außen sichtbar sind, lassen eine exakte Überprüfung der jeweiligen Einstellung ablesen. Eine weitere Möglichkeit zum Einstellen des Stopelementes 13 besteht darin, das zapfenförmig eingeführte Stopelement 13 an einem in axialer Richtung längeren Stopelementträger, der sich mit dem Stopelement 13 zwischen dessen Stopstellung und Passivstellung bewegt, umsteckbar oder versetzbar anzubringen.4 and 5, a stepped or a stepless adjustment of the stop element in the axial direction is shown. With regard to a sensitive adjustment of the stop element, the housing 20 could be held displaceably in an axial guide and be adjustable by means of a screw spindle. It would also be conceivable to adjust the housing 20 or the stop element 13 sensitively by means of an eccentric. Corresponding scales, which are visible from the outside, show an exact check of the respective setting. A further possibility for adjusting the stop element 13 consists in attaching the stop element 13 inserted in the form of a pin to a stop element carrier which is longer in the axial direction and which moves with the stop element 13 between its stop position and passive position.

Claims (9)

  1. Thread storage and delivery apparatus for textile machines, especially for the weft thread of a multi-colour weaving machine, with a device for limiting the length of the thread drawn off in measured portions, with a drum-shaped storage member for a thread supply consisting of turns, from which the thread can be drawn off via one end of the drum, and with at least one stop element of the device, which stop element is arranged at an axial distance from the last thread turn of the thread supply and can be moved out of a passive position, in which the thread drawn off with a rotational movement passes the stop element, into a stop position, in which the thread under draw-off tension is caught on the stop element during a rest phase until the next movement of the stop element into the passive position, characterized in that the axial distance between the last turn (11') of the thread supply (S) and the stop element (13) can be adjusted to a maximum value (Amax), at which, in the rest phase, an axial travelling movement of the thread (F) in at least the last turn (11') and in the thread portion (12) between the last turn of the thread supply and the stop element (13) is absent.
  2. Thread storage and delivery apparatus according to Claim 1, characterized in that the stop element (13) is arranged so as to be adjustable approximately in the axial direction of the storage member (2) into a position in which, with the thread (F) caught, the angle between the last turn (11') and the thread portion (12) extending from the last turn (11') to the stop element (13) is limited to a maximum value (αmax) which prevents an axial travelling movement of the thread (F) in the last turn (11') and which, in the rest phase, is maintained essentially unchanged.
  3. Thread storage and delivery apparatus according to Claim 1, characterized in that the maximum value (Amax) of the axial distance between the last thread turn (11') and the stop element (13) corresponds approximately to twice to five times the thread diameter.
  4. Thread storage and delivery apparatus according to Claim 2, characterized in that the maximum value (αmax) of the angle between the last turn (11') and the portion (12) is between 5° and 30°, preferably between 10° and 15°.
  5. Thread storage and delivery apparatus according to Claims 1 to 4, the stop element being accommodated, together with actuating elements, in a fixed housing located opposite to and at a radial distance from the storage surface of the storage member, characterized in that the housing is adjustable in the axial direction of the storage member (2).
  6. Thread storage and delivery apparatus according to Claims 1 to 4, the stop element being accommodated, together with actuating elements, in a fixed housing located opposite to and at a radial distance from the storage surface of the storage member, characterized in that the stop element (13) can be adjusted in the housing (21) in the axial direction of the storage member (2) and can be fixed in different adjusted positions.
  7. Thread storage and delivery apparatus according to one of Claims 1 to 6, the stop element engaging, in the stop position, in a recess in the storage surface of the storage member, characterized in that, for the engagement of the stop element (13), a plurality of successive recesses (25) or an axially continuous groove (26) is provided in the direction of adjustment of the stop element (13), and in that the stop element (13) is adjustable in predetermined steps or continuously within a limited axial range.
  8. Thread storage and delivery apparatus according to one of Claims 1 to 7, there being provided outside the storage member a maximum sensor for the thread supply which monitors the axial length of the last turn of the thread supply, characterized in that the maximum sensor (8) and the stop element (13) are accommodated in a common housing, and in that the housing is adjustable in the axial direction.
  9. Thread storage and delivery apparatus according to Claim 8, characterized in that the relative axial distance between the stop element and the maximum sensor in the housing is adjustable.
EP89911057A 1988-10-06 1989-10-05 Thread storage and delivery device Expired - Lifetime EP0438439B1 (en)

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AT89911057T ATE100876T1 (en) 1988-10-06 1989-10-05 THREAD STORAGE AND DELIVERY DEVICE.

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DE3834055 1988-10-06
DE3834055A DE3834055C1 (en) 1988-10-06 1988-10-06

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JP (1) JP2961376B2 (en)
KR (1) KR970007689B1 (en)
CZ (1) CZ278713B6 (en)
DE (2) DE3834055C1 (en)
WO (1) WO1990004057A1 (en)

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DE19942121A1 (en) * 1999-09-03 2001-03-08 Iro Patent Ag Baar Method for controlling a thread processing system and thread processing system
CZ20131060A3 (en) * 2013-12-20 2014-09-03 Rieter Cz S.R.O. Method of removing yarn, particularly faulty yarn, from yarn interstice bin in textile machine workstation and apparatus for making the same

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BE890082A (en) * 1981-08-26 1982-02-26 Picanol Nv THREAD PREPARATION DEVICE FOR SHOOTELESS LOOPED
JPS59482U (en) * 1982-06-25 1984-01-05 津田駒工業株式会社 Weft storage device for fluid jet looms
BE900492A (en) * 1984-09-04 1985-03-04 Picanol Nv SPEED ADJUSTMENT OF IMPOSITION PRE-WRAPPER IN LOOMS.
EP0225670B1 (en) * 1985-12-09 1989-05-17 Picanol N.V. Process for unwinding a thread from a reel in looms, and arrangement used therefor
IT1188625B (en) * 1986-03-25 1988-01-20 Roy Electrotex Spa OSCILLATION AND VIBRATION DAMPING DEVICE OF WEFT WIRES IN WEFT FEEDING DEVICE FOR AIR FRAMES
BE905471A (en) * 1986-09-23 1987-03-23 Picanol Nv METHOD OF ADJUSTING THE LENGTH OF THE GAUGES TO BE MADE IN WEAVING MACHINES AND USING DEVICES USING THIS.
SE8800839D0 (en) * 1988-03-09 1988-03-09 Iro Ab PROCEDURE AND DEVICE FOR SPEED CONTROL OF A FOURNISSOR FOR THE INTERMEDIATE STORAGE OF YARN, WIRE OR CLEAR

Also Published As

Publication number Publication date
EP0438439A1 (en) 1991-07-31
US5170822A (en) 1992-12-15
CS8905645A2 (en) 1991-08-13
KR970007689B1 (en) 1997-05-15
DE3834055C1 (en) 1989-12-28
CZ278713B6 (en) 1994-05-18
JPH04501142A (en) 1992-02-27
JP2961376B2 (en) 1999-10-12
DE58906848D1 (en) 1994-03-10
KR900702103A (en) 1990-12-05
WO1990004057A1 (en) 1990-04-19

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