EP1540058B1 - Feed rapier for a rapier loom - Google Patents

Feed rapier for a rapier loom Download PDF

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Publication number
EP1540058B1
EP1540058B1 EP02772333A EP02772333A EP1540058B1 EP 1540058 B1 EP1540058 B1 EP 1540058B1 EP 02772333 A EP02772333 A EP 02772333A EP 02772333 A EP02772333 A EP 02772333A EP 1540058 B1 EP1540058 B1 EP 1540058B1
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EP
European Patent Office
Prior art keywords
clamp
thread
yam
yarn
piece
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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EP02772333A
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German (de)
French (fr)
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EP1540058A1 (en
Inventor
Eddy Verclyte
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Picanol NV
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Picanol NV
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Filing date
Publication date
Application filed by Picanol NV filed Critical Picanol NV
Priority to AT08003534T priority Critical patent/ATE544892T1/en
Priority to EP08003534A priority patent/EP1923494B1/en
Publication of EP1540058A1 publication Critical patent/EP1540058A1/en
Application granted granted Critical
Publication of EP1540058B1 publication Critical patent/EP1540058B1/en
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    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20Constructional features of the thread-engaging device on the inserters
    • D03D47/23Thread grippers
    • D03D47/233Carrying grippers

Definitions

  • the invention relates to a Gebergreifer for a rapier according to the preamble of claim 1.
  • Geprüokfer are known ( US 5,007,463 . DE 298 11 373 U ), in which a piece of thread, which is to be taken over by a gripper rapier, is held between a deflection point of the gripper housing and a multi-part gripper clamp.
  • the gripper grippers arranged on a gripper belt or a gripper bar are moved at very high speeds. From this high speed, they must be slowed down when they reach the transfer point, where a gripper taker takes over the weft. It may happen that a weft thread moves on because of its inertia, so that the yarn gripper to be taken over by the thread piece leaves its predetermined position.
  • the release of the to be accepted by a gripper rapier piece of thread is then prevented when this piece of thread is held between two thread clamps ( GB 1 487 897 ).
  • two identical thread clamps are provided, which are loaded by the same spring element.
  • the piece of thread located between the two thread clamp, which is to be taken over by the gripper rapier, will not move out of the range of its predetermined position even when braking from high speeds.
  • the slave gripper or taker usually has a hook-shaped head, with which he has to reach behind the thread piece held between the two thread clamps. He deflects the thread piece, which then moves back behind the hook when the hook has been moved past the thread piece. In the case of weft threads having little elasticity and / or only low strength, this deflection can lead to the piece of thread being damaged or destroyed, so that a weft defect can occur.
  • the invention has the object of providing a Gebergreifer of the type mentioned in such a way that a deflection of the thread piece between the two thread clamps leads to no damage and / or destruction of the thread piece.
  • the thread clamps keep the weft thread clamped by it even at high deceleration forces, so that the thread piece does not leave its predetermined position.
  • the deflection of the thread piece due to the hook-shaped element of the receiver generates tensile forces in the thread piece, due to which the resilient element yields such that excessive stress on the thread piece is avoided. If the recipient has penetrated far enough into the Gebergreifer so that the hook-shaped element engages behind the thread piece, the deflection of the thread piece is reversed, since the resilient element moves back to its normal position.
  • the piece of thread is stretched again, so that it passes safely behind the hook-shaped element and is gripped.
  • Gebergreifer 1 corresponds in its basic structure in the WO 99/18274 described Gereiokfer. It is therefore based on the description in the WO 99/18274 with reference. In the present application, the same reference numerals are used.
  • the Gebergreifer invention 1 is equipped with a second, uncontrolled thread clamp 50, whose function will be explained.
  • This additional thread clamp is formed by a leaf spring designed as a clamping element 51 and the inner surface of the top of the body forming portion 6 of the Gebergreifers 1.
  • the resilient clamping element 51 is at the bottom of the body forming Section 4 attached.
  • this attachment is effected by means of two screws 45, with which the main body of Gebergreifers 1 is attached to a gripper belt 2.
  • the designed as a leaf spring clamping element 51 is extended beyond the nip of the thread clamp 50 addition with a guide member 52 which extends forward to the front end of the Gebergreifers 1 and is bent to the side and down. This guide element 52 serves to ensure that a weft thread 25 reaches securely into the region of the nip 53 of the thread clamp 50.
  • the clamping force with which the thread clamp 50 holds the weft thread 25 is relatively small, since it only has to prevent a movement of the weft thread 25 against the inertia forces which occur during a deceleration. It is therefore also designed for a low value, since it must be possible without further ado that the taker can pull out the weft thread taken by him from the thread clamp 50. Therefore, no opening device must be provided for this thread clamp 50.
  • the nip 53 of the thread clamp 50 is in the direction of movement of Gebergreifers something in front of the stop 23 of the guide 22. This is achieved above all that only a slight dust formation is to be expected. Any resulting dust can not be deposited due to the open structure of the thread clamp 50.
  • Fig. 5 dashed the head of a hook-shaped receiver 55 is shown, which penetrates into the Gebergreifer 1.
  • the head 55 has a hook-shaped projection 56, which is opposite to the thread piece of the weft thread 25, which is located between the thread clamp 15, 16 and the thread clamp 50.
  • the piece of thread of the weft thread 25 is deflected between the thread clamps 15, 16 and 50 of the hook-shaped projection 56, as shown in Fig. 5 is shown.
  • the hook-shaped projection 56 has moved past the thread piece of the weft thread 25, this should again be in Fig. 5 take shown, stretched position so that it is then taken and moved when moving back the head 55 of the hook-shaped receiver.
  • the thread clamp 50 is formed so that the resilient clamping element 51 yields in the opening direction, when in the Thread piece between the two thread clamps 15, 16 and 50 an additional tensile force is introduced.
  • This yielding is in Fig. 5 indicated by dashed lines. Since the additional tensile force disappears again when the hook-shaped projection 56 has moved past the thread piece of the weft thread 25, the resilient clamping element 51 moves back into the closed position, so that the thread piece is stretched again and passes safely behind the hook-shaped projection 56 , In the embodiment according to Fig. 5 the opening of the thread clamp 50 is only very briefly, so that the weft thread 25 during this time does not have the opportunity to move out of the thread clamp 50 out.
  • the stationary clamping surface is a separate component which is attached to the main body of the Gebergreifers 1.
  • the thread clamp 50 is designed so that it provides for the compensation of the required for the deflection of the thread piece of the weft thread 25 distance available without the thread clamp 50 opens completely.
  • a thread clamp 50 with this function is in Fig. 6 shown.
  • the resilient clamping element 51 ' has a relatively wide in the direction of movement of the Geber gripper 1 clamping surface and is also designed so that it can deform elastically in the form of torsion about a longitudinal axis. As in Fig. 6 is illustrated, to compensate for the deflection by the head 55 of the receiver, this clamping surface is only tilted, so that the clamping effect is not completely eliminated.
  • the thread clamp 50 has two movable clamping elements 53, 54 which are adjacent to each other.
  • the inner clamping element 54 ie that of the end of the weft thread 25 holding thread clamp 15, 16 facing clamping element is designed so that it yields elastically in the position shown in dashed lines occurring in the thread piece tensile forces.
  • the clamping element 53 is stiffer, so that the part of the thread clamp 50 formed by it is not opened.
  • two independently designed and fixed clamping elements 53, 54 may be provided instead of the one-piece element. It can also be provided in this embodiment that the clamping elements 53, 54 do not act directly on the base body 6 but rather on the base body 6 attached clamping piece act.
  • the tensile elastic forces in the thread piece elastic element for example, the element 54 does not jam the weft 25 but only deflects.
  • Such an elastic element is then arranged in a modified embodiment in the vicinity of the thread clamp 15, 16 or the deflection 13.
  • the resilient element itself does not have to be a resilient element.
  • a rigid, crank-shaped element can be provided, which is rotatably mounted and held with a torsion spring.
  • the clamping element is not resiliently resilient, but by means of magnetic forces, permanent magnets or electrically controllable magnets are used.
  • the free end of the weft thread 25 associated thread clamp 15, 16 is arranged in the lower region of the Gebergreifers 1, while the second thread clamp 15 is in the upper region of the Gebergreifers 1.
  • this arrangement can also be reversed.
  • the invention is not limited to the shape of the main body of Gebergreifers 1.
  • Gebergreifer can be used, which are composed of several elements.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

A component (51) is included, which is compliant under tensile forces arising in the section of thread. The component is located near a thread clip (50) facing the end of the weft thread (25) section. It is part of a thread clip (50). The main body has a thread guide near side walls (8, 9) and the lower side (4), with a thread clip (50) close by. A further stationary clamping surface is provided opposite the clip. Tensile force in the weft moves the clip away from the stationary face. In a further design, the clip may be turned by tensile force in the thread, about a longitudinal axis. A leaf spring forms part of the clip. The design is further detailed.

Description

Die Erfindung betrifft einen Gebergreifer für eine Greiferwebmaschine entsprechend dem Oberbegriff des Anspruches 1.The invention relates to a Gebergreifer for a rapier according to the preamble of claim 1.

Es sind Gebergreifer bekannt ( US 5.007.463 , DE 298 11 373 U ), bei welchen ein Fadenstück, das von einem Nehmergreifer übernommen werden soll, zwischen einer Umlenkstelle des. Greifergehäuses und einer mehrteiligen Greiferklemme gehalten wird. Bei modernen Greiferwebmaschinen werden die auf einem Greiferband oder einer Greiferstange angeordneten Gebergreifer mit sehr hohen Geschwindigkeiten bewegt. Aus dieser hohen Geschwindigkeit müssen sie abgebremst werden, wenn sie die übergabestelle erreichen, an welcher ein Nehmergreifer den Schussfaden übernimmt. Es kann vorkommen, dass sich ein Schussfaden aufgrund seiner Massenträgheit weiterbewegt, so dass das von dem Nehmergreifer zu übernehmende Fadenstück seine vorgegebene Position verlässt. Es kann somit geschehen, dass der Nehmergreifer den Schussfaden nicht ergreift, so dass es zu einem Schussfehler kommt. Die Gefahr des Freiwerdens des zu übernehmenden Fadenstücks kann inbesondere bei schweren Schussfäden auch dann auftreten, wenn eine gut funktionierende Fadenbremse auf der Eintragsseite vorgesehen ist, da die Massenträgheitskräfte den Schussfaden bei dem Bremsen elastisch dehnen.Geprüfreifer are known ( US 5,007,463 . DE 298 11 373 U ), in which a piece of thread, which is to be taken over by a gripper rapier, is held between a deflection point of the gripper housing and a multi-part gripper clamp. In modern rapier weaving machines, the gripper grippers arranged on a gripper belt or a gripper bar are moved at very high speeds. From this high speed, they must be slowed down when they reach the transfer point, where a gripper taker takes over the weft. It may happen that a weft thread moves on because of its inertia, so that the yarn gripper to be taken over by the thread piece leaves its predetermined position. It can thus happen that the gripper rapier does not grab the weft thread, so that it comes to a weft error. The danger of becoming free to take over Thread piece can also occur in heavy weft threads even if a well-functioning thread brake is provided on the entry side, since the inertia forces elastically stretch the weft thread during braking.

Das Freiwerden des von einem Nehmergreifer zu übernehmenden Fadenstücks wird dann verhindert, wenn dieses Fadenstück zwischen zwei Fadenklemmen gehalten ist ( GB 1 487 897 ). Bei dieser Bauart sind zwei gleichartige Fadenklemmen vorgesehen, die von dem gleichen Federelement belastet werden. Das zwischen den beiden Fadenklemme befindliche Fadenstück, das von dem Nehmergreifer zu übernehmen ist, wird sich auch bei einem Abbremsen aus hohen Geschwindigkeiten nicht aus dem Bereich seiner vorgegebenen Position bewegen. Der Nehmergreifer oder Nehmer hat üblicherweise einen hakenförmigen Kopf, mit welchem er das zwischen den beiden Fadenklemmen gehaltene Fadenstück hintergreifen muss. Dabei lenkt er das Fadenstück aus, das sich dann hinter den Haken zurückbewegt, wenn der Haken an dem Fadenstück vorbeibewegt worden ist. Bei wenig elastischen und/oder nur eine geringe Festigkeit aufweisenden Schussfäden kann dieses Auslenken dazu führen, dass das Fadenstück beschädigt oder zerstört wird, so dass es zu einem Schussfehler kommen kann.The release of the to be accepted by a gripper rapier piece of thread is then prevented when this piece of thread is held between two thread clamps ( GB 1 487 897 ). In this design, two identical thread clamps are provided, which are loaded by the same spring element. The piece of thread located between the two thread clamp, which is to be taken over by the gripper rapier, will not move out of the range of its predetermined position even when braking from high speeds. The slave gripper or taker usually has a hook-shaped head, with which he has to reach behind the thread piece held between the two thread clamps. He deflects the thread piece, which then moves back behind the hook when the hook has been moved past the thread piece. In the case of weft threads having little elasticity and / or only low strength, this deflection can lead to the piece of thread being damaged or destroyed, so that a weft defect can occur.

Der Erfindung liegt die Aufgabe zugrunde, einen Gebergreifer der eingangs genannten Art so auszubilden, dass eine Auslenkung des Fadenstücks zwischen den beiden Fadenklemmen zu keiner Beschädigung und/oder Zerstörung des Fadenstücks führt.The invention has the object of providing a Gebergreifer of the type mentioned in such a way that a deflection of the thread piece between the two thread clamps leads to no damage and / or destruction of the thread piece.

Diese Aufgabe wird durch den Gebergreifer des Patentanspruches 1 gelöst.This object is achieved by the Geberreifer of claim 1.

Die Fadenklemmen halten den von ihr geklemmten Schussfaden auch bei hohen Verzögerungskräften sicher, so dass das Fadenstück seine vorgegebene Position nicht verlässt. Die Auslenkung des Fadenstückes aufgrund des hakenförmigen Elementes des Nehmers erzeugt Zugkräfte in dem Fadenstück, aufgrund deren das nachgiebige Element derart nachgibt, dass eine zu hohe Beanspruchung des Fadenstücks vermieden wird. Wenn der Nehmer weit genug in den Gebergreifer eingedrungen ist, so dass das hakenförmige Element das Fadenstück hintergreift, wird die Auslenkung des Fadenstückes rückgängig gemacht, da sich das nachgiebige Element wieder in seine Grundstellung zurückbewegt.The thread clamps keep the weft thread clamped by it even at high deceleration forces, so that the thread piece does not leave its predetermined position. The deflection of the thread piece due to the hook-shaped element of the receiver generates tensile forces in the thread piece, due to which the resilient element yields such that excessive stress on the thread piece is avoided. If the recipient has penetrated far enough into the Gebergreifer so that the hook-shaped element engages behind the thread piece, the deflection of the thread piece is reversed, since the resilient element moves back to its normal position.

Dabei wird das Fadenstück wieder gespannt, so dass es sicher hinter das hakenförmige Element gelangt und ergriffen wird.The piece of thread is stretched again, so that it passes safely behind the hook-shaped element and is gripped.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung von Ausführungsbeispielen.

Fig. 1
zeigt einen erfindungsgemäßen Gebergreifer bei der Zustellung zu einem bereitgehaltenen Schussfaden,
Fig. 2
den Gebergreifer in seiner Endposition beim Eintragen eines Schussfadens,
Fig. 3
eine Draufsicht auf den Gebergreifer in etwas geänderten Maßstab,
Fig. 4
eine Seitenansicht des Gebergreifers nach Fig. 3,
Fig. 5
einen Schnitt durch den Gebergreifer nach Fig. 3 entlang der Linie V-V,
Fig. 6
einen Schnitt ähnlich Fig. 5 einer weiteren Ausführungsform und
Fig. 7
einen Schnitt ähnlich Fig. 5 und 6 einer abgewandelten Aus- führungsform.
Further features and advantages of the invention will become apparent from the dependent claims and the following description of exemplary embodiments.
Fig. 1
shows a Gebergreifer according to the invention in the delivery to a holding weft yarn,
Fig. 2
the Geber gripper in its final position when entering a weft thread,
Fig. 3
a top view of the Geberreifer in a slightly different scale,
Fig. 4
a side view of the Geberreifers after Fig. 3 .
Fig. 5
a section through the Geberreifer after Fig. 3 along the line VV,
Fig. 6
similar to a cut Fig. 5 a further embodiment and
Fig. 7
similar to a cut FIGS. 5 and 6 a modified embodiment.

Der als Ausführungsbeispiel in den Zeichnungen dargestellte Gebergreifer 1 entspricht in seinem Grundaufbau dem in der WO 99/18274 beschriebenen Gebergreifer. Es wird deshalb auf die Beschreibung in der WO 99/18274 bezug genommen. In der vorliegenden Anmeldung sind die gleichen Bezugszeichen eingesetzt. Zusätzlich ist der erfindungsgemäße Gebergreifer 1 mit einer zweiten, ungesteuerten Fadenklemme 50 ausgerüstet, deren Funktion noch erläutert werden wird. Diese zusätzliche Fadenklemme wird von einem als Blattfeder ausgebildeten Klemmelement 51 und der Innenfläche des die Oberseite des Grundkörpers bildenden Abschnittes 6 des Gebergreifers 1 gebildet. Das federelastische Klemmelement 51 ist an dem den Boden des Grundkörpers bildenden Abschnitt 4 befestigt. Bei dem Ausführungsbeispiel erfolgt diese Befestigung mittels zwei Schrauben 45, mit denen der Grundkörper des Gebergreifers 1 an einem Greiferband 2 angebracht ist. Das als Blattfeder ausgestaltete Klemmelement 51 ist über die Klemmstelle der Fadenklemme 50 hinaus mit einem Führungselement 52 verlängert, das sich nach vorne zu dem vorderen Ende des Gebergreifers 1 hin erstreckt und zur Seite und nach unten abgebogen ist. Dieses Führungselement 52 dient dazu, dass ein Schussfaden 25 sicher in den Bereich der Klemmstelle 53 der Fadenklemme 50 gelangt.The illustrated as an embodiment in the drawings Gebergreifer 1 corresponds in its basic structure in the WO 99/18274 described Gereifreifer. It is therefore based on the description in the WO 99/18274 with reference. In the present application, the same reference numerals are used. In addition, the Gebergreifer invention 1 is equipped with a second, uncontrolled thread clamp 50, whose function will be explained. This additional thread clamp is formed by a leaf spring designed as a clamping element 51 and the inner surface of the top of the body forming portion 6 of the Gebergreifers 1. The resilient clamping element 51 is at the bottom of the body forming Section 4 attached. In the embodiment, this attachment is effected by means of two screws 45, with which the main body of Gebergreifers 1 is attached to a gripper belt 2. The designed as a leaf spring clamping element 51 is extended beyond the nip of the thread clamp 50 addition with a guide member 52 which extends forward to the front end of the Gebergreifers 1 and is bent to the side and down. This guide element 52 serves to ensure that a weft thread 25 reaches securely into the region of the nip 53 of the thread clamp 50.

Wenn der Gebergreifer 1 sich der Stelle nähert, an welcher der Schussfaden 25 von einem Nehmergreifer übernommen wird, erfolgt eine sehr starke Verzögerung aus hoher Geschwindigkeit bis zum Stillstand. Dabei besteht die Gefahr, dass der Schussfaden aufgrund seiner Massenträgheit den Bereich des Anschlages 23 verlässt und sich nach vorne in Richtung zu dem vorderen Ende des Gebergreifes 1 bewegt, wie das in Fig. 2 dargestellt ist. Der Schussfaden 25 verlässt dann seine vorbestimmte Position, so dass die Gefahr besteht, dass er von einem Nehmergreifer nicht erfasst wird. Dieser Gefahr wirkt die Fadenklemme 50 entgegen, die den Schussfaden 25 im Bereich des Anschlags 23 der Führung 22 hält. Die Klemmkraft, mit welcher die Fadenklemme 50 den Schussfaden 25 hält, ist relativ gering, da sie nur eine Bewegung des Schussfadens 25 gegen die bei einer Verzögerung auftretenden Massenkräfte verhindern muss. Sie wird auch deshalb auf einen geringen Wert ausgelegt, da es ohne weiteres möglich sein muss, dass der Nehmer den von ihm ergriffenen Schussfaden aus der Fadenklemme 50 herausziehen kann. Für diese Fadenklemme 50 muss daher keine Öffnungseinrichtung vorgesehen werden. Die Klemmstelle 53 der Fadenklemme 50 liegt in Bewegungsrichtung des Gebergreifers etwas vor dem Anschlag 23 der Führung 22. Damit wird vor allem erreicht, dass nur eine geringe Staubbildung zu erwarten ist. Eventuell entstehender Staub kann sich aufgrund der offenen Struktur der Fadenklemme 50 nicht ablagern.When the rapier 1 approaches the point at which the weft thread 25 is taken over by a gripper rapier, a very high deceleration from high speed to a standstill takes place. There is a risk that the weft thread leaves the region of the stop 23 due to its inertia and moves forward toward the front end of the Geberreifes 1, as in Fig. 2 is shown. The weft thread 25 then leaves its predetermined position, so that there is a risk that it is not detected by a gripper rapier. This risk counteracts the thread clamp 50 which holds the weft thread 25 in the region of the stop 23 of the guide 22. The clamping force with which the thread clamp 50 holds the weft thread 25 is relatively small, since it only has to prevent a movement of the weft thread 25 against the inertia forces which occur during a deceleration. It is therefore also designed for a low value, since it must be possible without further ado that the taker can pull out the weft thread taken by him from the thread clamp 50. Therefore, no opening device must be provided for this thread clamp 50. The nip 53 of the thread clamp 50 is in the direction of movement of Gebergreifers something in front of the stop 23 of the guide 22. This is achieved above all that only a slight dust formation is to be expected. Any resulting dust can not be deposited due to the open structure of the thread clamp 50.

In Fig. 5 ist gestrichelt der Kopf eines hakenförmigen Nehmers 55 dargestellt, der in den Gebergreifer 1 eindringt. Der Kopf 55 besitzt einen hakenförmigen Ansatz 56, der dem Fadenstück des Schussfadens 25 gegenüberliegt, das sich zwischen der Fadenklemme 15, 16 und der Fadenklemme 50 befindet. Beim Eindringen des Kopfes 55 in den Gebergreifer 1 wird das Fadenstück des Schussfadens 25 zwischen den Fadenklemmen 15, 16 und 50 von dem hakenförmigen Ansatz 56 ausgelenkt, wie dies in Fig. 5 dargestellt ist. Wenn der hakenförmige Ansatz 56 sich an dem Fadenstück des Schussfadens 25 vorbeibewegt hat, so sollte dieses wieder die in Fig. 5 dargestellte, gestreckte Position einnehmen, so dass er dann beim Rückbewegen des Kopfes 55 des hakenförmigen Nehmers ergriffen und mitgenommen wird.In Fig. 5 dashed the head of a hook-shaped receiver 55 is shown, which penetrates into the Gebergreifer 1. The head 55 has a hook-shaped projection 56, which is opposite to the thread piece of the weft thread 25, which is located between the thread clamp 15, 16 and the thread clamp 50. Upon penetration of the head 55 in the Gebergreifer 1, the piece of thread of the weft thread 25 is deflected between the thread clamps 15, 16 and 50 of the hook-shaped projection 56, as shown in Fig. 5 is shown. When the hook-shaped projection 56 has moved past the thread piece of the weft thread 25, this should again be in Fig. 5 take shown, stretched position so that it is then taken and moved when moving back the head 55 of the hook-shaped receiver.

Um das Auslenken des Fadenstückes des Schussfadens 25 und auch das Zurückbewegen in die gestreckte Position zu gestatten, ohne dass die Gefahr von Beschädigungen des Schussfadens 25 besteht, ist die Fadenklemme 50 so ausgebildet, dass das federnd nachgiebige Klemmelement 51 in Öffnungsrichtung nachgibt, wenn in dem Fadenstück zwischen den beiden Fadenklemmen 15, 16 und 50 eine zusätzliche Zugkraft eingebracht wird. Dieses Nachgeben ist in Fig. 5 gestrichelt angedeutet. Da die zusätzliche Zugkraft wieder verschwindet, wenn sich der hakenförmige Ansatz 56 an dem Fadenstück des Schussfadens 25 vorbeibewegt hat, bewegt sich das federnd nachgiebige Klemmelement 51 wieder in die Schließposition zurück, so dass das Fadenstück wieder gespannt wird und sicher hinter den hakenförmigen Vorsprung 56 gelangt. Bei der Ausführungsform nach Fig. 5 erfolgt das Öffnen der Fadenklemme 50 nur sehr kurzzeitig, so dass der Schussfaden 25 während dieser Zeit nicht die Gelegenheit hat, sich aus der Fadenklemme 50 heraus zu bewegen.In order to allow the deflection of the thread piece of the weft thread 25 and the return to the extended position, without the risk of damage to the weft thread 25, the thread clamp 50 is formed so that the resilient clamping element 51 yields in the opening direction, when in the Thread piece between the two thread clamps 15, 16 and 50 an additional tensile force is introduced. This yielding is in Fig. 5 indicated by dashed lines. Since the additional tensile force disappears again when the hook-shaped projection 56 has moved past the thread piece of the weft thread 25, the resilient clamping element 51 moves back into the closed position, so that the thread piece is stretched again and passes safely behind the hook-shaped projection 56 , In the embodiment according to Fig. 5 the opening of the thread clamp 50 is only very briefly, so that the weft thread 25 during this time does not have the opportunity to move out of the thread clamp 50 out.

Für die Fadenklemme 50 sind eine Vielzahl verschiedener Gestaltungen möglich. Es muss lediglich darauf geachtet werden, dass die Elemente dieser Fadenklemme 50 das Eindringen des Kopfes 55 eines Nehmers nicht behindern. Bei einer abgewandelten Ausführungsform ist die stationäre Klemmfläche ein eigenes Bauteil, das an dem Grundkörper des Gebergreifers 1 befestigt ist. Bei einer weiter abgewandelten Ausführungsform ist vorgesehen, dass die Fadenklemme 50 so gestaltet ist, dass sie zum Ausgleichen des für das Auslenken des Fadenstücks des Schussfadens 25 benötigte Wegstück zur Verfügung stellt, ohne dass die Fadenklemme 50 vollständig öffnet. Eine Fadenklemme 50 mit dieser Funktion ist in Fig. 6 dargestellt. Das federelastische Klemmelement 51' weist eine in Bewegungsrichtung des Gebergreifers 1 relativ breite Klemmfläche auf und ist ferner so gestaltet, dass es sich in Form von Torsion um eine Längsachse elastisch verformen kann. Wie in Fig. 6 dargestellt ist, wird zum Ausgleichen der Auslenkung durch den Kopf 55 des Nehmers diese Klemmfläche nur gekippt, so dass die Klemmwirkung nicht vollständig aufgehoben wird.For the thread clamp 50 a variety of different designs are possible. It only needs to be taken to ensure that the elements of this thread clamp 50 does not hinder the penetration of the head 55 of a taker. In a modified embodiment, the stationary clamping surface is a separate component which is attached to the main body of the Gebergreifers 1. In a further modified embodiment, it is provided that the thread clamp 50 is designed so that it provides for the compensation of the required for the deflection of the thread piece of the weft thread 25 distance available without the thread clamp 50 opens completely. A thread clamp 50 with this function is in Fig. 6 shown. The resilient clamping element 51 'has a relatively wide in the direction of movement of the Geber gripper 1 clamping surface and is also designed so that it can deform elastically in the form of torsion about a longitudinal axis. As in Fig. 6 is illustrated, to compensate for the deflection by the head 55 of the receiver, this clamping surface is only tilted, so that the clamping effect is not completely eliminated.

Bei der Ausführungsform nach Fig. 7 ist vorgesehen, dass die Fadenklemme 50 zwei bewegliche Klemmelemente 53, 54 aufweist, die nebeneinander liegen. Das innere Klemmelement 54, d.h. das der das Ende des Schussfadens 25 haltenden Fadenklemme 15, 16 zugewandte Klemmelement ist so gestaltet, dass es bei in dem Fadenstück auftretenden Zugkräften elastisch in die gestrichelt dargestellte Position nachgibt. Das Klemmelement 53 ist dagegen steifer, so dass der von ihm gebildete Teil der Fadenklemme 50 nicht geöffnet wird. Um diese unterscheidlichen Federsteifigkeiten zu realisieren, können zwei unabhängig voneinander gestaltete und befestigte Klemmelemente 53, 54 anstelle des einteiligen Elementes vorgesehen werden. Auch bei dieser Ausführungsform kann vorgesehen werden, dass die Klemmelemente 53, 54 nicht unmittelbar auf den Grundkörper 6 sondern auf ein an dem Grundkörper 6 angebrachtes Klemmstück wirken. Bei einer abgewandelten Ausführungsform wird vorgesehen, dass das bei Zugkräften in dem Fadenstück nachgiebige elastische Element, beispielsweise das Element 54 den Schussfaden 25 nicht klemmt sondern nur auslenkt. Ein derartiges elastisches Element wird bei einer abgewandelten Ausführungsform dann in der Nähe der Fadenklemme 15, 16 oder der Umlenkung 13 angeordnet.In the embodiment according to Fig. 7 it is provided that the thread clamp 50 has two movable clamping elements 53, 54 which are adjacent to each other. The inner clamping element 54, ie that of the end of the weft thread 25 holding thread clamp 15, 16 facing clamping element is designed so that it yields elastically in the position shown in dashed lines occurring in the thread piece tensile forces. By contrast, the clamping element 53 is stiffer, so that the part of the thread clamp 50 formed by it is not opened. To realize these differential spring stiffnesses, two independently designed and fixed clamping elements 53, 54 may be provided instead of the one-piece element. It can also be provided in this embodiment that the clamping elements 53, 54 do not act directly on the base body 6 but rather on the base body 6 attached clamping piece act. In a modified embodiment, it is provided that the tensile elastic forces in the thread piece elastic element, for example, the element 54 does not jam the weft 25 but only deflects. Such an elastic element is then arranged in a modified embodiment in the vicinity of the thread clamp 15, 16 or the deflection 13.

Das nachgiebige Element muss selbst auch kein federelastisches Element sein. Beispielsweise kann starres, kurbelartig gestaltetes Element vorgesehen werden, das drehbar gelagert und mit einer Torsionsfeder gehalten ist. Bei einer abgewandelten Ausführungsform wird dann weiter vorgesehen, dass das Klemmelement nicht federelastisch nachgiebig gehalten ist, sondern mittels Magnetkräften, wobei Permanentmagnete oder auch elektrisch ansteuerbare Magnete eingesetzt werden.The resilient element itself does not have to be a resilient element. For example, a rigid, crank-shaped element can be provided, which is rotatably mounted and held with a torsion spring. In a modified embodiment is then further provided that the clamping element is not resiliently resilient, but by means of magnetic forces, permanent magnets or electrically controllable magnets are used.

Bei den Ausführungsbeispielen ist vorgesehen, dass die dem freien Ende des Schussfadens 25 zugeordnete Fadenklemme 15, 16 im unteren Bereich des Gebergreifers 1 angeordnet ist, während sich die zweite Fadenklemme 15 in dem oberen Bereich des Gebergreifers 1 befindet. Selbstverständlich kann diese Anordnung auch umgekehrt sein.In the embodiments, it is provided that the free end of the weft thread 25 associated thread clamp 15, 16 is arranged in the lower region of the Gebergreifers 1, while the second thread clamp 15 is in the upper region of the Gebergreifers 1. Of course, this arrangement can also be reversed.

Die Erfindung ist auch nicht auf die Form des Grundkörpers des Gebergreifers 1 beschränkt. Insbesondere können auch Gebergreifer verwendet werden, die aus mehreren Elementen zusammengefügt sind.The invention is not limited to the shape of the main body of Gebergreifers 1. In particular, Gebergreifer can be used, which are composed of several elements.

Claims (13)

  1. Feed gripper for a rapier weaving machine, having two yarn clamps (15, 16; 50) which are arranged at a distance from one another for keeping in readiness between said yarn clamps a piece of a weft yam (25) to be taken over by a receiver (55), characterized in that an element (51, 51'; 54) is provided which is resiliently yielding, which yields resiliently in the case of an increased yam tensile force in the piece of yarn on account of a deflection of this piece of yarn, and which moves back again and stresses the piece of yam again in the process when the deflection is reversed.
  2. Feed gripper according to Claim 1, characterized in that the yielding element (51, 51', 54) is located in the vicinity of a yam clamp (50) facing away from the end of the piece of the weft yam (25).
  3. Feed gripper according to Claim 1 or 2, characterized in that the yielding element (51, 51', 54) is a component of a yam clamp (50).
  4. Feed gripper according to Claim 3, characterized in that the yielding element (51, 51', 54) is a clamp element of the yam clamp (50).
  5. Feed gripper according to one of Claims 1 through 4, characterized in that a base body is provided, one yarn guide each being provided in the region of one side wall (8) and an underside (4) and in the region of a further side wall (9) and in the region of a top side (6), one of the yam clamps (15, 16; 50) being disposed in the vicinity of each yam guide.
  6. Feed gripper according to one of Claims 1 through 5, characterized in that the yam clamp (50) facing away from the end of the weft yam has a stationary clamping face for a yielding clamp element (51, 51') pressing against this clamping face.
  7. Feed gripper according to one of Claims 1 through 6, characterized in that the clamp element (51) is designed and/or located such that it is movable away from the stationary clamping face by means of a tensile force in the piece of the weft yarn (25).
  8. Feed gripper according to one of Claims 1 through 6, characterized in that the clamp element (51') is designed and/or located such that it is rotatable about a longitudinal axis by means of a tensile force in the piece of the weft yam (25).
  9. Feed gripper according to one of Claims 1 through 8, characterized in that the inner face of the top side (6) of the base body, or a clamping piece mounted on the base body (6), serves as the stationary clamping face.
  10. Feed gripper according to one of Claims 1 through 9, characterized in that a leaf spring is provided as the yielding element (51).
  11. Feed gripper according to one of Claims 1 through 10, characterized in that with a guide element (52), the yielding element (51, 51', 54) protrudes, in the direction of the front end of the base body, beyond the region of the clamping location (53) of the yarn clamp (50).
  12. Feed gripper according to one of Claims 1 through 11, characterized in that the clamping location (53) of the yarn clamp (50), facing away from the end of the weft yarn (25), is set back relative to the clamping location of the other yam clamp (15, 16) - viewed in the direction of motion of the gripper (1).
  13. Feed gripper according to one of Claims 1 through 12, characterized in that the clamping location (53) of the yarn clamp (50) which faces away from the end of the weft yarn (25) lies, in the movement direction of the gripper, in front of a stop (23) which delimits the yarn guide (22) of the adjacent side wall (9).
EP02772333A 2002-09-20 2002-09-20 Feed rapier for a rapier loom Expired - Lifetime EP1540058B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT08003534T ATE544892T1 (en) 2002-09-20 2002-09-20 ENCODER GRIPPER FOR A CLIPPER WEAVING MACHINE
EP08003534A EP1923494B1 (en) 2002-09-20 2002-09-20 Carrying gripper for a clip weaving machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2002/010613 WO2004033778A1 (en) 2002-09-20 2002-09-20 Feed rapier for a rapier loom

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP08003534A Division EP1923494B1 (en) 2002-09-20 2002-09-20 Carrying gripper for a clip weaving machine

Publications (2)

Publication Number Publication Date
EP1540058A1 EP1540058A1 (en) 2005-06-15
EP1540058B1 true EP1540058B1 (en) 2009-10-28

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ID=32087922

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Application Number Title Priority Date Filing Date
EP08003534A Expired - Lifetime EP1923494B1 (en) 2002-09-20 2002-09-20 Carrying gripper for a clip weaving machine
EP02772333A Expired - Lifetime EP1540058B1 (en) 2002-09-20 2002-09-20 Feed rapier for a rapier loom

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08003534A Expired - Lifetime EP1923494B1 (en) 2002-09-20 2002-09-20 Carrying gripper for a clip weaving machine

Country Status (7)

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US (1) US7128098B2 (en)
EP (2) EP1923494B1 (en)
CN (1) CN1705778B (en)
AT (2) ATE544892T1 (en)
AU (1) AU2002337122A1 (en)
DE (1) DE50213973D1 (en)
WO (1) WO2004033778A1 (en)

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EP1724383B1 (en) * 2005-05-17 2008-12-31 Promatech S.p.A. Carrying gripper for weaving looms with (anti-loop) device to avoid anticipated weft gripping
EP1806443B1 (en) * 2006-01-06 2009-02-11 Sultex AG Feeding gripper for a shuttleless weaving loom
EP1811068B1 (en) * 2006-01-24 2009-06-17 Sultex AG Controlled weft brake
DE102006025968B3 (en) * 2006-06-02 2007-11-29 Lindauer Dornier Gmbh Reliable clamping of weft thread in jet loom, especially air jet loom, by use of movable clamping member with clamping force magnetically reinforced in thread clamping position
EP1918437A1 (en) * 2006-11-02 2008-05-07 Sultex AG Method and device for weft insertion
BE1017477A3 (en) * 2007-02-26 2008-10-07 Picanol Nv A GRIJPER WEAVING MACHINE WITH A GRAINER AND A BENDING GUIDE.
EP2037023A1 (en) * 2007-09-12 2009-03-18 Sultex AG Thread clamp for a gripper head and method for operating the same
BE1019316A3 (en) * 2010-04-29 2012-06-05 Picanol Nv LANS AND GRAB WEAVER.
DE102010044127B3 (en) * 2010-11-18 2011-12-29 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Gripper head for the entry of weft threads on a rapier loom and a rapier loom with such a gripper head
CN101988230B (en) * 2010-11-26 2012-05-23 浙江奔特纺织机械有限公司 Rapier head assembly suitable for flexible rapier loom
CN104805571B (en) * 2015-04-17 2016-04-06 徐向忠 A kind of hingeless slider-rocker mechanism and weft connecting rapier head for rapier weaving
ITUB20155478A1 (en) * 2015-11-11 2017-05-11 Pezzoli Miria DEVICE FOR THE OPENING OF A GRIPPING PLANT SOCKET ELEMENT OF A CLAMP FRAME, ITS 5 SOCKET ELEMENT AND OPENING METHOD OF SUCH A SOCKET ELEMENT
IT201700066823A1 (en) * 2017-06-15 2018-12-15 Itema Spa PERFECTED SOCKET / RELEASE SYSTEM OF THE PLOT WIRE IN A TEXTILE FRAME
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CN109137225A (en) * 2018-10-10 2019-01-04 张克杰 One kind being suitable for a variety of yarn weaving rapier loom weft-sending sword heads

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Also Published As

Publication number Publication date
US20050284533A1 (en) 2005-12-29
CN1705778A (en) 2005-12-07
ATE447059T1 (en) 2009-11-15
US7128098B2 (en) 2006-10-31
ATE544892T1 (en) 2012-02-15
EP1923494A1 (en) 2008-05-21
CN1705778B (en) 2010-06-23
AU2002337122A1 (en) 2004-05-04
DE50213973D1 (en) 2009-12-10
WO2004033778A1 (en) 2004-04-22
EP1540058A1 (en) 2005-06-15
EP1923494B1 (en) 2012-02-08

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