EP0247967A1 - Weft storing device for a loom - Google Patents

Weft storing device for a loom Download PDF

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Publication number
EP0247967A1
EP0247967A1 EP87810162A EP87810162A EP0247967A1 EP 0247967 A1 EP0247967 A1 EP 0247967A1 EP 87810162 A EP87810162 A EP 87810162A EP 87810162 A EP87810162 A EP 87810162A EP 0247967 A1 EP0247967 A1 EP 0247967A1
Authority
EP
European Patent Office
Prior art keywords
drum
thread
circumference
weft
memory according
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.)
Granted
Application number
EP87810162A
Other languages
German (de)
French (fr)
Other versions
EP0247967B1 (en
Inventor
Paul Lincke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer AG
Original Assignee
Sulzer AG
Gebrueder Sulzer AG
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Filing date
Publication date
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Publication of EP0247967A1 publication Critical patent/EP0247967A1/en
Application granted granted Critical
Publication of EP0247967B1 publication Critical patent/EP0247967B1/en
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • D03D47/367—Monitoring yarn quantity on the drum
    • 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
    • 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

Definitions

  • the invention relates to a weft thread store for weaving machines, to which thread is fed from a supply spool and from which thread is drawn discontinuously for entry into the shed of a weaving machine, with a stationary drum supported on its outer circumference for receiving a thread supply to be stored, and with a the drum circumference rotating winding member with a driving link for the weft.
  • such a weft storage device is dealt with as a thread transport and storage device. Its function is limited to providing a sufficient thread supply for the weft thread insertion between the warp threads of a weaving machine, without measuring the weft thread according to the fabric width. Such a memory would not be suitable for use on air jet looms, for example, since the weft thread must have a defined length during the entry in the shed so that an unnecessarily large excess of thread on the catch side of the loom after the entry can be avoided.
  • the invention which solves this problem, is characterized in that the driving link can be switched on and off according to a program.
  • the driving element can also be arranged several times on the rotating winding element.
  • the drum is supported on the outer circumference, for example with magnets or brushes, for example on conical ends of the drum, and at the same time it is secured against rotation.
  • the winding element for the weft thread is a constantly rotating ring surrounding the drum circumference, from which at least one driving pin can temporarily engage in a recess in the drum.
  • thread guides are arranged in the axis of the drum, which ensure that the thread runs up and down the conical parts of the drum.
  • At least one controllable thread holding element is attached to the drum circumference, which contributes to the building up or dismantling of the thread winding on the drum.
  • a controllable thread holding element can also be arranged in front of the storage ring.
  • the thread holding members in front of and behind the storage ring are simultaneously designed as means for mounting the drum.
  • the memory described can be used for example for rapier or air weaving machines. It is suitable for single or multi-shot operation.
  • the invention is characterized by a low cost of mechanical means and by the low mass of the driving elements or holding elements for the weft thread to be controlled intermittently.
  • the weft store 1 is usually arranged between the weft bobbin 5 and the loom 4 in looms. It carries the drum bearings l2, l3 and the ring bearing l5 for the winding ring l4 as well as the thread eyelets 6, 7 and the weft thread brakes 2, 3 on a frame l0.
  • the drum ll for storing the weft thread has a conical front and rear drum part ll4, ll5 on.
  • the drum parts have magnetic inlays ll6, ll7 in the case of a magnetic drum bearing, which can be distributed around the circumference as shown in FIG. 2 or can be made rotationally symmetrical in FIG. 2a.
  • the winding ring l4 carries one or more winding magnets l4l, from which winding pins l42 according to arrow l42 Pfeil can be moved into a groove III in the drum ll.
  • a cylindrical part 112 adjoins the groove III for the defined placement of the weft thread with the aid of the winding pin 142. In the thread running direction to the right in FIG. 1, this is followed by a recess ll3 on the drum circumference, into which a pin l52 according to arrow l52 Magnet can be moved by a magnet l5l.
  • the winding magnets l4l and winding pins l42 and the magnets l5l and pins l52 can be arranged in any number distributed around the drum circumference.
  • the magnets can be excited by the control device 43 via connecting lines, the contact tracks l53 and l54 and the sliding contacts l55 and l56.
  • magnetic means for actuating the winding pin l42 or the pin l52 for example as pneumatically operated actuators can be provided.
  • a brush can be arranged on the winding ring l4, which lies lightly on the circumference of the drum and ensures a defined weft thread tension during the thread run. The direction of the thread is indicated by arrow 52.
  • the winding ring l4 is a pulley l45 which is driven by a drive belt l44.
  • the winding ring l4 is held in the ring bearing l5 via the bearings l57 and l58.
  • the drum bearings l2 and l3 act on the magnetic inserts ll6 and ll7 of the drum ll via magnets l2l and l3l. As shown in FIG. 2, the magnets can be arranged partially or distributed over the entire circumference of the drum. The bearing forces come about through opposing magnetic fields of magnets l3l and l2l and magnetic deposits ll7 and ll6. At the same time, the magnets in the arrangement in FIG. 2 can secure the drum against rotation.
  • Fig. L the working position of the memory is shown towards the end of the storage process shortly before the weft insertion.
  • the weft brake 2 is open while the weft brake 3 is closed.
  • the winding pin for the weft thread l42 and the pin l52 for holding the thread roll on the drum circumference are in the lower position in engagement with the drum ll.
  • the brake 3 is opened while the brake 2 is closed.
  • the winding magnet l4l and the magnet l5l or the magnets with a multiple arrangement keep the pins l42 and l52 withdrawn when the weft is inserted, whereupon the weft thread supply on the storage device remains open until the weft thread is stretched a meridian line of the drum 11 can be drawn off through the main nozzle 4l.
  • the weft insertion can also be carried out by a gripper member.
  • the stored thread winding 5l can also be held on the drum circumference for any length of time, the pins l52 remaining in engagement and the winding pins l42 having to be retracted into the winding ring l4.
  • a space-saving disc rotor motor can be arranged around the drum circumference.
  • the control of the winding magnets l4l and the magnets l5l for holding the winding can be accomplished by means of a weft sensor in connection with the control device 43, which ensures that the weft thread length stored by the drum ll is correctly measured.
  • the memory function In multi-shot mode, the memory function must be controlled by the control device 43 with the pattern control of the machine, e.g. can be coordinated via the control of the dobby 42.
  • FIG. 3 shows how the weft thread is deposited on the circumference of the drum from the stretched, extended position after engagement of the winding pins 142 or the pins 152.
  • the dashed layers of the weft thread 52 represent its position at short time intervals, during which the winding pins 142 or pin 192 move in the direction of the arrow.
  • FIG. 5 shows a simplified embodiment of the weft thread storage device with the drum 11 being supported by brushes l22 and l32 in the drum bearings l2 and l3.
  • the weft thread 52 describes a cone during winding or unwinding.
  • the recess ll3 is designed as a groove in which a brush ll8 or Bridges ll9 are embedded. Slipping of individual weft layers into the groove ll3 can thus be avoided.
  • this design allows a partial positional deviation of the drum, for example twisting around the axis, which can be permitted with robust weft yarns.
  • the driving pin l42 is advantageously designed to be elastically resilient, as shown in FIG. 6, so that weft thread tension peaks are avoided when the winding pin l42 takes it suddenly.
  • the drum 11 When the drum 11 is arranged vertically, it is carried by the brush I22 according to FIG. 7.
  • the contact pressure of the drum ll on the brush l22 can be adjusted as desired.
  • the vertical mounting of the drum II has the advantage that no significant resistance between the brush I32 and the drum II has to be overcome when storing on the top of the drum.
  • the brush l32 is used here only to brake the weft thread when it is drawn off and to center the drum ll. In vertical drum storage, the weft thread is deflected by a deflecting element 8 in the direction of the main nozzle 4l.
  • a magnet l5la for holding the weft thread winding is arranged on the inlet side in front of the winding ring l4 in the weft direction and is switched on after the winding process by pulling the winding pin l42 out of the groove III in FIG. 4 has ended.
  • Drum bearings l2 and l3 in this case have the same function as the pins l52 and l52a, which are intended to prevent the thread winding 5l from slipping off after the storage process has ended and before being unloaded.
  • FIGS. 9a and 9b instead of ring-shaped magnets l2l and l3l, clamping claws l6 and l7 are arranged in the drum bearings l2, l3, which according to the program can be inserted into grooves l6l and l7l of the drum ll, while holding the drum and at the same time Secure the weft thread 52 around the circumference of the drum.
  • FIG. 9c shows the arrangement of the clamping claws l6 with respect to the drum ll in a view in the axial direction.
  • the clamping claws can have segments attached as shown in FIG. 9c, with which the drum 11 can be held over the entire circumference.
  • the drum II is preferably made of plastic which is coated with a wear-resistant layer, e.g. Chrome, can be coated.
  • a wear-resistant layer e.g. Chrome

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

Abstract

Ein Schussfadenspeicher für Webmaschinen, dem von einer Vorratsspule (5) Faden zugeführt wird und von dem diskontinuierlich Faden für den Eintrag in das Webfach einer Webmaschine abgezogen wird, weist eine stillstehende an ihrem äusseren Umfang abgestützte Trommel (ll) zur Aufnahme eines zu speichernden Fadenvorrats (5l) und ein um den Trommelumfang (lll) rotierendes Wickelorgan (l4) mit einem Mitnahmeglied (l42) für den Schussfaden (52) auf. Das Mitnahmeglied ist gemäss einem Programm bezüglich des Schussfadens ein- und ausschaltbar und vermag im eingeschalteten Zustand Schussgarn am Trommelumfang (lll) aufzuwickeln. Das Mitnahmeglied (l42) kann mehrfach am Umfang des Wickelorgans (l4) angeordnet sein. Die Trommel (ll) ist am äusseren Umfang beispielsweise durch Magnete oder mittels Bürsten horizontal bzw. vertikal abgestützt. Das Wickelorgan ist ein um den Trommelumfang ständig rotierender Ring, von dem aus wenigstens ein Stift (l42) zeitweise in eine Aussparung (lll) der Trommel greifen kann. Der Schussfadenspeicher zeichnet sich durch geringen Aufwand an mechanischen Mitteln und durch die geringe Masse der intermittierend zu steuernden Halteglieder (l42, l52) für den Schussfaden aus.A weft thread store for weaving machines, to which thread is fed from a supply spool (5) and from which thread is drawn discontinuously for entry into the weaving shed of a weaving machine, has a stationary drum (II) supported on its outer circumference for receiving a thread supply to be stored ( 5l) and a winding member (l4) rotating around the drum circumference (lll) with a driving element (l42) for the weft thread (52). The driving link can be switched on and off according to a program with regard to the weft thread and, when switched on, is able to wind up weft yarn around the drum circumference (III). The driving link (l42) can be arranged several times on the circumference of the winding member (l4). The drum (II) is supported horizontally or vertically on the outer circumference, for example by magnets or by means of brushes. The winding member is a ring which constantly rotates around the circumference of the drum, from which at least one pin (142) can temporarily engage in a recess (III) in the drum. The weft thread storage device is characterized by a low outlay on mechanical means and by the low mass of the holding members (l42, l52) to be controlled intermittently for the weft thread.

Description

Die Erfindung betrifft einen Schussfadenspeicher für Webmaschinen, dem von einer Vorratsspule Faden zugeführt wird und von dem diskontinuierlich Faden für den Eintrag in das Webfach einer Webmaschine abgezogen wird, mit einer stillstehenden an ihrem äusseren Umfang abgestützten Trommel zur Aufnahme eines zu speichernden Fadenvorrats und mit einem um den Trommelumfang rotierenden Wickelorgan mit einem Mitnahmeglied für den Schussfaden.The invention relates to a weft thread store for weaving machines, to which thread is fed from a supply spool and from which thread is drawn discontinuously for entry into the shed of a weaving machine, with a stationary drum supported on its outer circumference for receiving a thread supply to be stored, and with a the drum circumference rotating winding member with a driving link for the weft.

In der deutschen Offenlegungsschrift 23 35 204 wird ein derartiger Schussfadenspeicher als Fadentransport- und Speichervorrichtung abgehandelt. Seine Funktion erschöpft sich darin, für den Schussfadeneintrag zwischen die Kett­fäden einer Webmaschine einen ausreichenden Fadenvorrat bereitzustellen, ohne den Schussfaden entsprechend der Gewebebreite abzumessen. Ein solcher Speicher wäre für die Verwendung beispielsweise an Luftdüsenwebmaschinen nicht geeignet, da der Schussfaden während des Eintrags im Webfach eine definierte Länge haben muss, damit ein unnötig grosser Fadenüberschuss an der Fangseite der Web­maschine nach dem Eintrag vermieden werden kann.In German Offenlegungsschrift 23 35 204, such a weft storage device is dealt with as a thread transport and storage device. Its function is limited to providing a sufficient thread supply for the weft thread insertion between the warp threads of a weaving machine, without measuring the weft thread according to the fabric width. Such a memory would not be suitable for use on air jet looms, for example, since the weft thread must have a defined length during the entry in the shed so that an unnecessarily large excess of thread on the catch side of the loom after the entry can be avoided.

Es ist Aufgabe der vorliegenden Erfindung, einen Faden­speicher zu schaffen, der auf einfache Weise neben der Speicherfunktion die Eigenschaft besitzt, eine frei wähl­bare Länge des aufgewickelten Fadenvorrats sicherzustellen, der zu einem beliebigen Zeitpunkt vom Speicher abgezogen werden kann.It is an object of the present invention to provide a thread store which, in addition to the storage function, has in a simple manner the property of ensuring a freely selectable length of the wound thread supply which can be withdrawn from the store at any time.

Die Erfindung, welche diese Aufgabe löst, ist dadurch ge­kennzeichnet, dass das Mitnahmeglied gemäss einem Programm ein- und ausschaltbar ist. Das Mitnahmeglied kann an dem rotierenden Wickelelement auch mehrfach angeordnet sein. Die Trommel ist am äusseren Umfang beispielsweise mit Magneten oder Bürsten abgestützt, beispielsweise an koni­schen Enden der Trommel, wobei sie gleichzeitig gegen Ver­drehung gesichert ist. Das Wickelelement für den Schuss­faden ist ein den Trommelumfang umgebender ständig rotie­render Ring, von dem aus wenigstens ein Mitnahmestift zeit­weise in eine Aussparung in der Trommel greifen kann. Vor und hinter der Trommel sind in der Achse der Trommel Faden­führer angeordnet, die das Auf- bzw. Ablaufen des Fadens an den konischen Partien der Trommel sicherstellen.The invention, which solves this problem, is characterized in that the driving link can be switched on and off according to a program. The driving element can also be arranged several times on the rotating winding element. The drum is supported on the outer circumference, for example with magnets or brushes, for example on conical ends of the drum, and at the same time it is secured against rotation. The winding element for the weft thread is a constantly rotating ring surrounding the drum circumference, from which at least one driving pin can temporarily engage in a recess in the drum. In front of and behind the drum, thread guides are arranged in the axis of the drum, which ensure that the thread runs up and down the conical parts of the drum.

In Fadenlaufrichtung nach dem Mitnahmering ist wenigstens ein steuerbares Fadenhalteorgan am Trommelumfang ange­bracht, das zum Auf- bzw. Abbau des Fadenwickels auf der Trommel beiträgt. Zum Festhalten eines gespeicherten Fa­denvorrates auf der Trommel kann auch vor dem Speicher­ring ein steuerbares Fadenhalteorgan angeordnet sein. In einer besonderen Ausführungsart dieses Speichers sind die Fadenhalteorgane vor und hinter dem Speicherring gleich­zeitig als Mittel zur Lagerung der Trommel ausgebildet.In the thread running direction after the driving ring, at least one controllable thread holding element is attached to the drum circumference, which contributes to the building up or dismantling of the thread winding on the drum. To hold a stored thread supply on the drum, a controllable thread holding element can also be arranged in front of the storage ring. In a special embodiment of this storage device, the thread holding members in front of and behind the storage ring are simultaneously designed as means for mounting the drum.

Der beschriebene Speicher kann beispielsweise für Greifer- ­oder Luftwebmaschinen eingesetzt werden. Er eignet sich für Ein- oder Mehrschussbetrieb. Die Erfindung zeichnet sich durch geringen Aufwand an mechanischen Mitteln und durch die geringe Masse der intermittierend zu steuernden Mitnahmeelemente bzw. Halteelemente für den Schussfaden aus.The memory described can be used for example for rapier or air weaving machines. It is suitable for single or multi-shot operation. The invention is characterized by a low cost of mechanical means and by the low mass of the driving elements or holding elements for the weft thread to be controlled intermittently.

Im folgenden wird die Erfindung anhand der Figuren im Detail beschrieben:

  • Fig. l zeigt eine Ansicht auf den Schussfadenspei­cher in einem Meridianschnitt,
  • Fig. 2 bzw. 2a zeigt die Anordnung der Lagerelemente für die Speichertrommel in einer Ansicht in Achsrichtung der Trommel in verkleinertem Massstab,
  • Fig. 3 ist eine Ansicht auf einen Teil des Trommel­umfangs im Bereich der Organe zur Mitnahme bzw. zum Festhalten des Fadens,
  • Fig. 4 zeigt diese Organe im Meridianschnitt zu­sammen mit ihrer Steuerung in Verbindung mit der Webmaschine,
  • Fig. 5 ist eine Darstellung ähnlich wie in Fig. l in einer abgewandelten Ausführung,
  • Fig. 6 zeigt eine Detailansicht eines Fadenmit­nehmers,
  • Fig. 7 zeigt eine Anordnung mit vertikal stehender Trommelachse,
  • Fig. 8a, 8b zeigen eine magnetische Lagerung für die Trommel mit wechselseitiger Lagerung der Trommel und
  • Fig. 9a, 9b, 9c beinhalten steuerbare Lagerelemente, die die Trommel abwechselnd festhalten.
The invention is described in detail below with reference to the figures:
  • 1 shows a view of the weft thread store in a meridian section,
  • 2 and 2a shows the arrangement of the bearing elements for the storage drum in a view in the axial direction of the drum on a reduced scale,
  • 3 is a view of a part of the drum circumference in the region of the organs for taking or holding the thread,
  • 4 shows these organs in meridian section together with their control in connection with the weaving machine,
  • 5 is an illustration similar to FIG. 1 in a modified embodiment,
  • 6 shows a detailed view of a thread driver,
  • 7 shows an arrangement with a vertical drum axis,
  • 8a, 8b show a magnetic bearing for the drum with mutual bearing of the drum and
  • 9a, 9b, 9c contain controllable bearing elements which hold the drum alternately.

Der Schussfadenspeicher l wird bei Webmaschinen übli­cherweise zwischen Schussfadenspule 5 und der Webmaschine 4 angeordnet. Er trägt auf einem Gestell l0 die Trommel­lager l2, l3 und das Ringlager l5 für den Wickelring l4 sowie die Fadenösen 6, 7 und die Schussfadenbremsen 2, 3. Die Trommel ll zum Speichern des Schussfadens weist je ein konisches vorderes und hinteres Trommelteil ll4, ll5 auf. Die Trommelteile besitzen magnetische Einlagen ll6, ll7 im Fall einer magnetischen Trommellagerung, die wie in Fig. 2 gezeigt am Umfang verteilt angeordnet sein können oder wie in Fig. 2a rotationssymmetrisch ausgeführt sein können. Der Wickelring l4 trägt einen oder mehrere Wickel­magnete l4l, von denen aus Wickelstifte l42 gemäss Pfeil l42ʹ in eine Nut lll der Trommel ll bewegt werden können. An die Nut lll schliesst sich eine zylindrische Partie ll2 zur definierten Ablage des Schussfadens mit Hilfe des Wickelstiftes l42 an. In Fadenlaufrichtung nach rechts in Fig. l schliesst sich daran eine Ausnehmung ll3 am Trommel­umfang an, in die ein Stift l52 gemäss Pfeil l52ʹ von einem Magnet l5l bewegt werden kann. Die Wickelmagnete l4l und Wickelstifte l42 sowie die Magnete l5l und Stifte l52 kön­nen in beliebiger Anzahl am Trommelumfang verteilt ange­ordnet sein. Die Magnete können von der Steuerungseinrich­tung 43 über Verbindungsleitungen, die Kontaktbahnen l53 und l54 sowie die Schleifkontakte l55 und l56 erregt wer­den. Anstatt magnetischer Mittel für die Betätigung des Wickelstiftes l42 bzw. des Stiftes l52 können beispiels­ weise auch pneumatisch betätigte Stellantriebe vorgesehen werden. Am Wickelring l4 kann eine Bürste angeordnet sein, die leicht am Trommelumfang aufliegt und für eine definier­te Schussfadenspannung während des Fadenlaufs sorgt. Die Fadenlaufrichtung wird jeweils mit Pfeil 52 angedeutet. Der Wickelring l4 ein Riemenrad l45, das über einen Antriebsriemen l44 angetrieben wird. Der Wickelring l4 ist über die Lager l57 und l58 im Ringlager l5 gehalten. Die Trommellager l2 und l3 wirken über Magnete l2l bzw. l3l auf die magnetischen Einlagen ll6 und ll7 der Trommel ll ein. Die Magnete können wie in Fig. 2 gezeigt partiell oder auch über den ganzen Trommelumfang verteilt angeord­net sein. Die Lagerkräfte kommen durch gegeneinander gerichtete magnetische Felder der Magnete l3l bzw. l2l und der magnetischen Einlagen ll7 bzw. ll6 zustande. Gleichzeitig können die Magnete bei der Anord­nung in Fig. 2 die Trommel gegen Verdrehung sichern.The weft store 1 is usually arranged between the weft bobbin 5 and the loom 4 in looms. It carries the drum bearings l2, l3 and the ring bearing l5 for the winding ring l4 as well as the thread eyelets 6, 7 and the weft thread brakes 2, 3 on a frame l0. The drum ll for storing the weft thread has a conical front and rear drum part ll4, ll5 on. The drum parts have magnetic inlays ll6, ll7 in the case of a magnetic drum bearing, which can be distributed around the circumference as shown in FIG. 2 or can be made rotationally symmetrical in FIG. 2a. The winding ring l4 carries one or more winding magnets l4l, from which winding pins l42 according to arrow l42 Pfeil can be moved into a groove III in the drum ll. A cylindrical part 112 adjoins the groove III for the defined placement of the weft thread with the aid of the winding pin 142. In the thread running direction to the right in FIG. 1, this is followed by a recess ll3 on the drum circumference, into which a pin l52 according to arrow l52 Magnet can be moved by a magnet l5l. The winding magnets l4l and winding pins l42 and the magnets l5l and pins l52 can be arranged in any number distributed around the drum circumference. The magnets can be excited by the control device 43 via connecting lines, the contact tracks l53 and l54 and the sliding contacts l55 and l56. Instead of magnetic means for actuating the winding pin l42 or the pin l52, for example as pneumatically operated actuators can be provided. A brush can be arranged on the winding ring l4, which lies lightly on the circumference of the drum and ensures a defined weft thread tension during the thread run. The direction of the thread is indicated by arrow 52. The winding ring l4 is a pulley l45 which is driven by a drive belt l44. The winding ring l4 is held in the ring bearing l5 via the bearings l57 and l58. The drum bearings l2 and l3 act on the magnetic inserts ll6 and ll7 of the drum ll via magnets l2l and l3l. As shown in FIG. 2, the magnets can be arranged partially or distributed over the entire circumference of the drum. The bearing forces come about through opposing magnetic fields of magnets l3l and l2l and magnetic deposits ll7 and ll6. At the same time, the magnets in the arrangement in FIG. 2 can secure the drum against rotation.

Im folgenden wird die Arbeitsweise des Schussfadenspei­chers beschrieben.The mode of operation of the weft thread store is described below.

In Fig. l ist die Arbeitsstellung des Speichers gegen Ende des Speichervorganges kurz vor dem Schussfadenein­trag dargestellt. Die Schussfadenbremse 2 ist geöffnet, während die Schussfadenbremse 3 geschlossen ist. Der Wickelstift für den Schussfaden l42 sowie der Stift l52 zum Festhalten des Fadenwickels am Trommelumfang sind in der unteren Stellung im Eingriff mit der Trommel ll. Bei der Entspeicherung wird die Bremse 3 geöffnet, während die Bremse 2 geschlossen wird. Der Wickelmagnet l4l und der Magnet l5l bzw. die Magnete bei mehrfacher Anordnung halten beim Schusseintrag die Stifte l42 und l52 zurück­gezogen, worauf der Schussfadenvorrat auf dem Speicher bis zur gestreckten Lage des Schussfadens auf einer Meridianlinie der Trommel ll durch die Hauptdüse 4l abgezogen werden kann. Wie erwähnt, kann der Schusseintrag aber auch durch ein Greiferorgan erfolgen. Im Mehrschuss­betrieb kann der gespeicherte Fadenwickel 5l am Trommelum­fang auch beliebig lange festgehalten werden, wobei die Stifte l52 im Eingriff bleiben und die Wickelstifte l42 in den Wickelring l4 zurückgezogen sein müssen.In Fig. L the working position of the memory is shown towards the end of the storage process shortly before the weft insertion. The weft brake 2 is open while the weft brake 3 is closed. The winding pin for the weft thread l42 and the pin l52 for holding the thread roll on the drum circumference are in the lower position in engagement with the drum ll. During the storage, the brake 3 is opened while the brake 2 is closed. The winding magnet l4l and the magnet l5l or the magnets with a multiple arrangement keep the pins l42 and l52 withdrawn when the weft is inserted, whereupon the weft thread supply on the storage device remains open until the weft thread is stretched a meridian line of the drum 11 can be drawn off through the main nozzle 4l. As mentioned, the weft insertion can also be carried out by a gripper member. In multi-shot mode, the stored thread winding 5l can also be held on the drum circumference for any length of time, the pins l52 remaining in engagement and the winding pins l42 having to be retracted into the winding ring l4.

Anstatt eines Antriebes mittels des Antriebsriemens l44 und des Riemenrades l45 kann beispielsweise ein platzspa­render Scheibenläufermotor um den Trommelumfang angeordnet werden. Die Steuerung der Wickelmagnete l4l und der Magne­te l5l zum Festhalten des Wickels kann mittels eines Schussfadenfühlers in Verbindung mit der Steuerungsein­richtung 43 bewerkstelligt werden, womit sichergestellt ist, dass die von der Trommel ll gespeicherte Schussfaden­länge richtig abgemessen ist. Beim Mehrschussbetrieb muss die Speicherfunktion durch die Steuerungseinrichtung 43 mit der Mustersteuerung der Maschine, z.B. über die Steuerung der Schaftmaschine 42,koordiniert werden.Instead of a drive by means of the drive belt l44 and the belt wheel l45, for example, a space-saving disc rotor motor can be arranged around the drum circumference. The control of the winding magnets l4l and the magnets l5l for holding the winding can be accomplished by means of a weft sensor in connection with the control device 43, which ensures that the weft thread length stored by the drum ll is correctly measured. In multi-shot mode, the memory function must be controlled by the control device 43 with the pattern control of the machine, e.g. can be coordinated via the control of the dobby 42.

In Fig. 3 ist dargestellt, wie der Schussfaden aus der ge­streckten ausgezogenen Lage nach Eingriff der Wickelstifte l42 bzw. der Stife l52 am Umfang der Trommel abgelegt wird. Die gestrichelten Lagen des Schussfadens 52 repräsentieren seine Lage in kurzen Zeitabständen, während der sich die Wickelstifte l42 bzw. der Stift l92 in Pfeilrichtung fortbewegen.FIG. 3 shows how the weft thread is deposited on the circumference of the drum from the stretched, extended position after engagement of the winding pins 142 or the pins 152. The dashed layers of the weft thread 52 represent its position at short time intervals, during which the winding pins 142 or pin 192 move in the direction of the arrow.

Fig. 5 zeigt eine vereinfachte Ausführung des Schussfaden­speichers mit Lagerung der Trommel ll durch Bürsten l22 bzw. l32 in den Trommellagern l2 und l3. Durch die Faden­ösen 2l und 22 beschreibt der Schussfaden 52 beim Auf- ­bzw. Abwickeln einen Kegel. In Fig. 5 ist die Ausnehmung ll3 als Nut ausgeführt, in der eine Bürste ll8 oder Stege ll9 eingelassen sind. So kann ein Abrutschen ein­zelner Schussfadenlagen in die Nut ll3 vermieden werden. Ferner erlaubt diese Ausführung eine partielle Lageab­weichung der Trommel, z.B. ein Verdrehen um die Achse, die bei robusten Schussgarnen zugelassen werden kann. Der Mitnahmestift l42 wird wie in Fig. 6 dargestellt mit Vorteil elastisch federnd ausgeführt, damit Schussfaden­spannungsspitzen bei der plötzlichen Mitnahme durch den Wickelstift l42 vermieden werden.5 shows a simplified embodiment of the weft thread storage device with the drum 11 being supported by brushes l22 and l32 in the drum bearings l2 and l3. Through the thread eyelets 2l and 22, the weft thread 52 describes a cone during winding or unwinding. In Fig. 5, the recess ll3 is designed as a groove in which a brush ll8 or Bridges ll9 are embedded. Slipping of individual weft layers into the groove ll3 can thus be avoided. Furthermore, this design allows a partial positional deviation of the drum, for example twisting around the axis, which can be permitted with robust weft yarns. The driving pin l42 is advantageously designed to be elastically resilient, as shown in FIG. 6, so that weft thread tension peaks are avoided when the winding pin l42 takes it suddenly.

Bei vertikaler Anordnung der Trommel ll wird sie durch die Bürste l22 gemäss Fig. 7 getragen. Mittels eines aus­tauschbaren Gewichts ll0 lässt sich der Auflagedruck der Trommel ll auf der Bürste l22 beliebig einstellen. Die vertikale Lagerung der Trommel ll hat den Vorteil, dass beim Entspeichern auf der Oberseite der Trommel kein nennenswerter Widerstand zwischen der Bürste l32 und der Trommel ll überwunden werden muss. Die Bürste l32 dient hier nur zur Bremsung des Schussfadens beim Abzug sowie zur Zentrierung der Trommel ll. Der Schussfaden wird bei vertikaler Trommellagerung durch ein Umlenkelement 8 in Richtung auf die Hauptdüse 4l umgelenkt.When the drum 11 is arranged vertically, it is carried by the brush I22 according to FIG. 7. By means of an interchangeable weight ll0, the contact pressure of the drum ll on the brush l22 can be adjusted as desired. The vertical mounting of the drum II has the advantage that no significant resistance between the brush I32 and the drum II has to be overcome when storing on the top of the drum. The brush l32 is used here only to brake the weft thread when it is drawn off and to center the drum ll. In vertical drum storage, the weft thread is deflected by a deflecting element 8 in the direction of the main nozzle 4l.

Falls ein Speicher für Mehrschussbetrieb verwendet wird, ist es günstig, wenn vor dem Wickelring l4 in Schussrich­tung noch ein Magnet l5la zum Festhalten des Schussfaden­wickels einlaufseitig angeordnet ist, der eingeschaltet wird, nachdem der Wickelvorgang durch Herausziehen des Wickelstiftes l42 aus der Nut lll in Fig. 4 beendet ist.If a memory is used for multi-shot operation, it is advantageous if a magnet l5la for holding the weft thread winding is arranged on the inlet side in front of the winding ring l4 in the weft direction and is switched on after the winding process by pulling the winding pin l42 out of the groove III in FIG. 4 has ended.

Fig. 8a und 8b zeigen eine Anordnung, bei der die Trommel ll beispielsweise durch ringförmige Magnete l2l und l3l wechselweise in eine linke bzw. rechte Position in die Trommellager l2 bzw. l3 gezogen werden können. Die Trommellager l2 und l3 haben in diesem Fall dieselbe Funktion wie die Stifte l52 und l52a, die das Abgleiten des Fadenwickels 5l nach Beendigung des Speichervorganges und vor Entspeichung verhindern sollen.8a and 8b show an arrangement in which the drum 11 can be pulled alternately into a left and right position in the drum bearings 12 and 13, for example by annular magnets 12l and 13l. The Drum bearings l2 and l3 in this case have the same function as the pins l52 and l52a, which are intended to prevent the thread winding 5l from slipping off after the storage process has ended and before being unloaded.

In einer weiteren Ausführung in Fig. 9a und 9b sind anstatt ringförmiger Magnete l2l und l3l Klemmklauen l6 und l7 in den Trommellagern l2, l3 angeordnet, die programmgemäss in Nuten l6l und l7l der Trommel ll eingefahren werden können, die Trommel dabei festhalten und gleichzeitig den Schuss­faden 52 am Umfang der Trommel sichern. Fig. 9c zeigt die Anordnung der Klemmklauen l6 gegenüber der Trommel ll in einer Ansicht in Achsrichtung. Die Klemmklauen können wie in Fig. 9c gestrichelt dargestellt angesetzte Segmente haben, womit die Trommel ll am ganzen Umfang gehalten werden kann.In a further embodiment in FIGS. 9a and 9b, instead of ring-shaped magnets l2l and l3l, clamping claws l6 and l7 are arranged in the drum bearings l2, l3, which according to the program can be inserted into grooves l6l and l7l of the drum ll, while holding the drum and at the same time Secure the weft thread 52 around the circumference of the drum. FIG. 9c shows the arrangement of the clamping claws l6 with respect to the drum ll in a view in the axial direction. The clamping claws can have segments attached as shown in FIG. 9c, with which the drum 11 can be held over the entire circumference.

Die Trommel ll wird vorzugsweise aus Kunststoff hergestellt, der mit einer verschleissfesten Schicht, z.B. Chrom, über­zogen werden kann.The drum II is preferably made of plastic which is coated with a wear-resistant layer, e.g. Chrome, can be coated.

Claims (12)

1. Schussfadenspeicher für Webmaschinen, dem von einer Vor­ratsspule (5) Faden zugeführt wird und von dem diskon­tinuierlich Faden für den Eintrag in das Webfach einer Webmaschine abgezogen wird, mit einer stillstehenden an ihrem äusseren Umfang abgestützten Trommel (ll) zur Auf­nahme eines zu speichernden Fadenvorrats (5l) und mit einem um den Trommelumfang (lll) rotierenden Wickel­organ (l4) mit einem Mitnahmeglied (l42) für den Schussfaden (52), dadurch gekennzeichnet, dass das Mitnahmeglied gemäss einem Programm ein- und ausschaltbar ist.1. weft storage for weaving machines, from which a supply spool (5) thread is fed and from which discontinuous thread is drawn for entry into the shed of a weaving machine, with a stationary drum (11) supported on its outer circumference for receiving a thread supply to be stored (5l) and with a winding member (l4) rotating around the drum circumference (lll) with a driving member (l42) for the weft thread (52), characterized in that the driving member can be switched on and off according to a program. 2. Speicher nach Anspruch l, dadurch gekennzeichnet, dass das Mitnahmeglied (l42) mehrfach am Umfang des Wickel­organs (l4) angeordnet ist.2. Memory according to claim l, characterized in that the driving member (l42) is arranged several times on the circumference of the winding member (l4). 3. Speicher nach Anspruch l, dadurch gekennzeichnet, dass die Trommel (ll) am äusseren Umfang (ll4) mit Magneten abgestützt ist.3. Memory according to claim l, characterized in that the drum (ll) is supported on the outer circumference (ll4) with magnets. 4. Speicher nach Anspruch l, dadurch gekennzeichnet, dass die Trommel (ll) am äusseren Umfang (ll4) mittels Bür­sten abgestützt ist.4. Memory according to claim l, characterized in that the drum (ll) is supported on the outer circumference (ll4) by means of brushes. 5. Speicher nach Anspruch l, dadurch gekennzeichnet, dass die Trommel an wenigstens einem Ende (ll4) abgestützt ist, wobei sie gleichzeitig gegen Verdrehung gesichert ist.5. Memory according to claim l, characterized in that the drum is supported on at least one end (ll4), wherein it is simultaneously secured against rotation. 6. Speicher nach Anspruch l, dadurch gekennzeichnet, dass das Wickelorgan (l4) ein um den Trommelumfang ständig rotierender Ring ist, von dem aus wenigstens ein Mit­nahmeglied (l42) zeitweise in eine Aussparung (lll) der Trommel greifen kann.6. Memory according to claim l, characterized in that the winding member (l4) is a ring which constantly rotates around the drum circumference, from which at least one driving member (l42) can temporarily engage in a recess (III) in the drum. 7. Speicher nach Anspruch l, dadurch gekennzeichnet, dass vor und hinter der Trommel (ll) Fadenführer (2, 3) an­geordnet sind und dass die Trommel (ll) konische Enden (ll4, ll5) aufweist, wobei die Kegelspitze der koni­schen Flächen der Trommelenden (ll4, ll5) in den Fa­denösen (7) liegen.7. Storage according to claim l, characterized in that in front and behind the drum (ll) thread guides (2, 3) are arranged and that the drum (ll) has conical ends (ll4, ll5), the conical tip of the conical surfaces of the The drum ends (ll4, ll5) lie in the thread eyelets (7). 8. Speicher nach Anspruch l, dadurch gekennzeichnet, dass vor und hinter der Trommel (ll) Fadenstopper (2, 3) angeordnet sind.8. Memory according to claim l, characterized in that thread stoppers (2, 3) are arranged in front of and behind the drum (II). 9. Speicher nach Anspruch l und 5, dadurch gekennzeichnet, dass die Trommel (ll) vertikal angeordnet und auf dem vor­deren Trommelteil (l2) abgestützt ist.9. Memory according to claim 1 and 5, characterized in that the drum (11) is arranged vertically and is supported on the front drum part (l2). l0. Speicher nach Anspruch 9, dadurch gekennzeichnet, dass der hintere Trommelteil (l2) von einem bürstenbesetzten Zentrierring (l32) umgeben ist.l0. Storage according to claim 9, characterized in that the rear drum part (l2) is surrounded by a brushed centering ring (l32). 11. Speicher nach Anspruch 9, dadurch gekennzeichnet, dass der vordere Trommelteil (l2) mit einem auswechselbaren Gewicht (ll0) versehen ist.11. The memory according to claim 9, characterized in that the front drum part (l2) is provided with an interchangeable weight (ll0). 12. Speicher nach Anspruch l, dadurch gekennzeichnet, dass der Trommelkörper (ll) überwiegend aus Kunststoff be­steht und am äusseren Umfang mit einem verschleiss­armen Belag beschichtet ist.12. The memory of claim l, characterized in that the drum body (II) consists predominantly of plastic and is coated on the outer circumference with a low-wear coating.
EP87810162A 1986-05-23 1987-03-20 Weft storing device for a loom Expired - Lifetime EP0247967B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2103/86 1986-05-23
CH2103/86A CH670263A5 (en) 1986-05-23 1986-05-23

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EP0247967B1 EP0247967B1 (en) 1990-07-18

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EP (1) EP0247967B1 (en)
JP (1) JPS62282042A (en)
CH (1) CH670263A5 (en)
DE (1) DE3763751D1 (en)

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US4744394A (en) 1988-05-17
DE3763751D1 (en) 1990-08-23
CH670263A5 (en) 1989-05-31
JPS62282042A (en) 1987-12-07
EP0247967B1 (en) 1990-07-18

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