EP1127181B1 - Thread gripper for a rapier of a rapier loom - Google Patents

Thread gripper for a rapier of a rapier loom Download PDF

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Publication number
EP1127181B1
EP1127181B1 EP99950613A EP99950613A EP1127181B1 EP 1127181 B1 EP1127181 B1 EP 1127181B1 EP 99950613 A EP99950613 A EP 99950613A EP 99950613 A EP99950613 A EP 99950613A EP 1127181 B1 EP1127181 B1 EP 1127181B1
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EP
European Patent Office
Prior art keywords
clamping
thread clamp
clamping element
thread
clamp 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.)
Expired - Lifetime
Application number
EP99950613A
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German (de)
French (fr)
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EP1127181B2 (en
EP1127181A1 (en
Inventor
Eddy Verclyte
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.)
Picanol NV
Original Assignee
Picanol NV
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Publication date
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Priority claimed from BE9800755A external-priority patent/BE1012242A3/en
Priority claimed from BE9900070A external-priority patent/BE1012459A6/en
Application filed by Picanol NV filed Critical Picanol NV
Publication of EP1127181A1 publication Critical patent/EP1127181A1/en
Publication of EP1127181B1 publication Critical patent/EP1127181B1/en
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Publication of EP1127181B2 publication Critical patent/EP1127181B2/en
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Classifications

    • 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 thread clamp for a gripper of a rapier with two clamping elements for clamping a weft thread, both of which each have a clamping portion, wherein the two clamping portions face each other.
  • a thread clamp is known from EP-A-0 207 533.
  • the invention has for its object to provide an improved thread clamp for grippers.
  • clamping portion of at least one of the clamping elements is adjustable relative to the clamping portion of the other clamping element and to its base body.
  • the clamping portion is attached to the base body by means of a holding part, and that a deformable connection point between the clamping portion and holding part is provided.
  • This elastically deformable connection point allows the adjustment of the clamping section, without the need to provide wear-prone parts.
  • the adjusting device includes an adjusting screw which is arranged in the region of the connection point between the base body or the holding part and the clamping portion. For a stepless adjustment of the clamping portion relative to the other is possible.
  • the movable clamping element forming a clamping portion leaf spring is whose end facing away from the clamping portion is attached to an extension of the main body of the other clamping element.
  • the adjusting or adjusting means are provided with means for limiting the Einstellweges. This ensures that the adjustment of the clamping portion is not so far that a plastic deformation occurs in the joint.
  • a Gebergreifer 1 which serves for introducing a weft yarn 2 in a shed 3, which is formed between warp threads 4 and 5.
  • the Gebergreifer 1 is fixed in a known manner by means of screws 6 at the front end of a rapier band 7.
  • the gripper belt 7 is driven by means not shown drive means and zoom in with the Gebergreifer 1 in the shed 3 and moved back out of the shed 3 to bring a weft 2 in the shed 3.
  • the Gebergreifer 1 has a hollow chamber-like housing 19 which is formed of a plurality of sections 8, 9, 10, 11 and 12 of a bent sheet.
  • the sheet metal is for example made of steel, an aluminum alloy or another metal.
  • a thread clamp 13 for a weft thread 2 by means of screws 14, 15 is attached in the region of the section 12.
  • the screws 14, 15 engage through transversely to the gripper longitudinal direction directed slots 16, 17, so that the thread clamp 13 can be fixed in a preselectable position on the hook body 19.
  • the thread clamp 13 has a base body 18 which is fixed by means of the screws 14, 15 fixed to the portion 12 of the gripper housing 19.
  • the stationary mounted base body 18 is integral with a clamping portion 20 which forms with its underside a clamping surface 21 for a weft thread.
  • a thread guide 22 is additionally attached by means of the screws 14, 15, which leads the weft yarn 2 to the region of the bottom of the gripper housing 19 down until the weft yarn 2 starts against a stop 23 of the yarn guide 22.
  • the thread clamp 13 further includes a movable clamping member 24 which consists of a leaf spring, which is for example made of spring steel.
  • the leaf spring forms with its top a clamping portion 25 for the weft yarn 2, which is opposite to the clamping surface 21 of the clamping portion 20 of the stationary clamping element 20.
  • the clamping section 25 facing away from the end 26 of the movable clamping element 24 is attached by means of a screw 28 to an extension 27 of the stationary base body 18. Due to a bias, the clamping element 24 exerts a defined clamping force in its clamping portion 25 on the clamping portion 20.
  • the clamping surface 21 of the clamping portion 20 is provided with a cross-sectionally substantially triangular rib which cooperates with a groove 29 of the movable clamping element 24.
  • the shed 3 When the gripper 1 - as shown in Fig. 1 - the shed 3 is delivered, so he takes a weft yarn 2, which is held between a feed needle 32 and the fabric 33.
  • the weft yarn 2 is guided below the portion 9 by means of the edges of cutouts of the portions 10 and 12 until it starts against the stops 34 and 35 of the gripper housing 19.
  • the weft thread 2 is received by the thread clamp 13 and runs against the stop 23 of the thread guide 22 at. Between the stop 23 and the stop 35 of the weft thread, as can be seen in the cross section of Fig. 2, at an angle H of about 50 ° to the portion 11, which forms the bottom of the gripper housing 19.
  • the weft thread 2 is clamped in the thread clamp 13 between the stopper 34 and the stopper 23. Once the weft yarn 2 is held clamped in the thread clamp 13, it is cut off by means of a weft cutter, not shown, in the region of the fabric 33 and then entered into the shed 3. In this entry, the weft yarn 2 is withdrawn from a thread supply, not shown, in particular from a Vorspul rĂ©elle or even from a coil.
  • the clamping portion 20 is adjustable relative to its base body 18 and to the clamping portion 25 of the movable clamping member 24 to adjust the angle A (FIG. 3) between the clamping surface 21 and the clamping portion 25 provided with the thread clamp 13 closed.
  • an elastically deformable connection point 37 is provided between the clamping portion 20 and the base body 18. This consists in the embodiment of a narrow web, which is present in the vicinity of the bottom and which has been obtained by means of a cutout 38.
  • an adjusting screw 39 is provided, which is screwed into a projection 40 of the base body 18 and which is supported against a side wall 41 of the cutout 38.
  • a lock nut 42 is provided in order to secure the adjusting screw 39 in the projection 40 of the base body 18.
  • the adjusting screw 39 is further screwed into the projection 40, as shown in Fig. 4, the elastically deformable joint 37 is deformed, so that instead of the angle A, the angle D results.
  • the position of the clamping portion 20 is infinitely adjustable.
  • the generally designated 30 setting means of the clamping portion 20 is further provided with a travel limit to limit the adjustment so that the range of elastic deformation is not exceeded.
  • a hook-shaped stop element 70 is provided on the projection 40, which engages with a stop surface 71 behind a stop surface 73 of the clamping portion 20.
  • the maximum adjustment of the clamping portion 20 is achieved. This prevents that the elastic joint 37 is deformed so much that a palstician deformation occurs. A plastic deformation would damage the thread clamp 13 as a whole, since they can not be brought back into a desired angular position.
  • the angle between the range A and D can be adapted to the weft threads to be processed and adjusted accordingly, without the position of the base body 18 relative to the Gebergreifer 1 is changed. Due to the interaction of the elastically deformable connection point 37 and the adjusting screw 39, the adjustment of the clamping portion 20 is not influenced by friction and / or play and / or wear of the adjusting means.
  • the setting can be changed again without affecting the setting means. It can be made a precise and above all stepless adjustment of the angle A to D. This is especially important when weaving weft threads, which consist of several thin threads or so-called filaments, which together form a thicker weft thread. The more filaments are present and the thinner they are, the smaller the angle A, D must be selected.
  • a stop face 72 of the hook-shaped stop element 70 comes into contact with a stop face 74 of the clamping section 20, whereby a further deformation of the elastic connection point 37 is restricted. It can thereby be achieved that the clamping portion 20 is always pressed with a defined force against the adjusting screw, which is generated as a spring force of the elastic connection point 37.
  • the running as a leaf spring, movable clamping member 24 is adjustable by means of an adjusting element 44 which has the shape of a bent leaf spring, as shown in Fig. 5.
  • the adjusting element 44 may cooperate in a known manner with a direction indicated in Fig. 5 stop 45, which is stationary on a Not shown frame of the loom is attached.
  • This stopper 45 is arranged next to the path of movement of the Gebergreifers 1 that he presses the adjusting element 44 inwardly during movement of Gebergreifers 1 along this stop 45 and thus the thread clamp 13 opens.
  • the adjusting element 44 is fastened together with the movable clamping element 24 with the interposition of an intermediate piece 43 by means of the screw 28 on the extension 27 of the base body 18.
  • the adjusting device 30 is not provided with a hook-shaped stop for limiting the setting path. In this embodiment, however, the adjustment can be limited by the fact that the adjusting screw 39 has a correspondingly limited length.
  • a second adjusting device 31 is provided, by means of which also the angle between the clamping surface 21 of the clamping portion 20 and the clamping portion 25 of the clamping element 24 can be adjusted when the thread clamp 13 is closed.
  • the clamping element 24 is executed according to the embodiment of FIGS. 1 to 5 and fastened by means of a screw 28 to an extension 46 of the base body 54 of the stationary clamping element.
  • the main body 54 is fastened with screws 14, 15 on the gripper housing 19 according to FIGS. 1 to 5.
  • the extension part 46 is divided into two sections, which are connected to each other by means of an elastically deformable connection point 47. In the region of this connection point 47, a milled cavity 48 is provided which is bounded on both sides by projections 51, 52.
  • An adjusting screw 49 is screwed into the projection 51 and is opposite to a side wall of the projection 52.
  • a lock nut 50 is provided on the adjusting screw 49.
  • the projection 51 is provided with a hook-shaped stop element 75, which has a stop surface 76 for a opposite surface 77 of the projection 52 forms and limited in this way the maximum adjustment.
  • the angular position of the clamping portion 25 of the clamping element 24 relative to the clamping surface 21 of the clamping portion 20 can be changed by means of the adjusting means 31 by correspondingly the extension 46 in the region of the elastically deformable connection point 47 is deformed.
  • the adjusting screw 49 is rotated and further screwed into the projection 51, the joint 47 is elastically deformed.
  • the angle A between the clamping surface 21 of the clamping portion 20 and the clamping portion 25 of the clamping element 24 changes from the angle A to the angle E in accordance with Fig. 7.
  • Turning the adjusting screw 49 has only a relatively small change in angle between the clamping surface 21 and the Pinching 25 result. This is due to the fact that the elastic connection point 47 is arranged at a greater distance from the clamping portion 25 of the clamping element 24 and that, moreover, the clamping element 24 is elastically deformable as a whole.
  • the angle adjustment can thus be adjusted relatively fine by means of an adjusting screw, especially if the thread pitch of the adjusting screw is selected accordingly.
  • an adjustment of the adjusting screw 39 leads to a relatively large change in angle. This makes it possible to change the angle adjustment by means of the adjusting screw 39 relatively quickly and perform a fine adjustment by means of the adjusting screw 49.
  • the force can be adjusted by means of the adjusting device 31, which is exerted by the clamping portion 25 of the clamping element 24 on the clamping surface 21 of the clamping portion 20.
  • This thread clamp 13 can be adjusted for example in the following manner. First, the clamping force is determined by turning the adjusting screw 49, which exerts the clamping element 24 with its clamping portion 25 on the clamping surface 21 of the clamping portion 20 of the other clamping element. Thereafter, the angular position between the clamping surface 21 of the clamping portion 20 is then adjusted to the clamping portion 25 by means of the adjusting screw 39 to a desired angle. This can be done before the main body 54 is attached to the gripper housing 19, or even afterwards. If it is determined during weaving that the thread clamp 13 does not optimally clamp the weft thread, the thread clamp 13 can be readjusted by means of the adjusting devices 30 and / or 31 without the thread clamp 13 being removed from the hook housing 19.
  • the clamping portion 20 is provided with a holding part 36 which is fixed by means of one or more screws 53 stationary on the base body 54 of the clamping element.
  • the deformable connection point 37 and the adjusting device 30 are provided in this embodiment between the holding part 36 and the clamping portion 20.
  • movable clamping element 24 and other actuating means can be provided as adjusting to open the thread clamp 13.
  • a modified embodiment which has a stationary arranged clamping element 61 with a clamping portion 25.
  • the clamping element 61 is integrally formed with a holder 55 which is fixed by means of screws 14, 15 on the gripper housing 19.
  • the clamping section 25 of the stationary clamping element 61 is assigned a movable clamping section 60 with a clamping surface 21.
  • the clamping portion 60 is integrally formed with a two-armed lever 57 which is pivotally mounted about an axis 56 on the holder 55. Between the lever 57 and the rearwardly extended stationary clamping element 60, a compression spring 58 is arranged, which presses the clamping portions 60, 61 against each other.
  • the lever arm 59 of the lever which has the clamping portion 60, is provided with an adjusting device 30 according to the embodiment of FIGS. 1 to 5, by means of which the angle B can be adjusted.
  • the lever 57 is pivoted against the action of the compression spring 58 by means of a stop, not shown counterclockwise about the axis 56.
  • the projection 40 is provided with a hook-shaped stopper 78 which forms a stop surface 79, which is associated with a stop surface 80 of the clamping portion 60.
  • this hook-shaped stop 78 is limited in this embodiment, the adjustment.
  • the invention is not limited to the illustrated embodiments. In particular, combinations between the embodiments are possible.
  • the elastic joints 37, 47 have the advantage that they are not subject to wear and are free of play.
  • the hook-shaped stops 70, 75, 78 which limit the adjustment paths of the adjusting devices 30, 31, other measures can be provided.
  • the same effect can also be achieved in that the length of the adjusting screws 39, 49 is selected so that the range of plastic deformation is certainly not reached.
  • connection points 37, 47 it is of course also possible to provide other adjustment means in the region of the elastic connection points 37, 47, by the adjustment of which an elastic deformation of these connection points 37, 47 is achieved, for example by spreading elements, which are inserted into the recesses 38, 48.
  • the thread clamp has been disclosed as part of a Gebergreifers.
  • a suitably designed thread clamp but also be provided in a gripper rapier.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)

Abstract

A yarn clamp (13) for a gripper of a rapier weaving machine includes two clamp elements for clamping a filling yarn (2). Each clamp element is fitted with one clamping segment (20, 25) and the segments are located opposite each other. The clamping segment (20) of at least one of the clamp elements is adjustable by means of an adjustment device (30) relative to the other clamping segment (25) and relative to the main body (18) of the one clamping segment.

Description

Die Erfindung betrifft eine Fadenklemme fĂĽr einen Greifer einer Greiferwebmaschine mit zwei Klemmelementen zum Klemmen eines SchuĂźfadens, die beide jeweils einen Klemmabschnitt aufweisen, wobei die beiden Klemmabschnitte einander gegenĂĽberliegen. Eine solche Fadenklemme ist aus EP-A-0 207 533 bekannt.The invention relates to a thread clamp for a gripper of a rapier with two clamping elements for clamping a weft thread, both of which each have a clamping portion, wherein the two clamping portions face each other. Such a thread clamp is known from EP-A-0 207 533.

Bei Greiferwebmaschinen wird auf der Eintragsseite eines Webfaches ein bereitgehaltener Schußfaden von einem Gebergreifer aufgenommen, geklemmt und in das Webfach eingetragen. In etwa der Mitte des Webfaches wird der Schußfaden von einem Nehmergreifer übernommen, der diesen Faden geklemmt hält und zur gegenüberliegenden Seite des Webfaches transportiert. Zum Klemmen des Schußfadens besitzen Gebergreifer und/oder Nehmergreifer eine Fadenklemme mit zwei Klemmelementen, zwischen denen ein Schußfaden geklemmt wird. Eines der Klemmelemente ist stationär an dem Greifer befestigt und das andere ist relativ dazu beweglich. Bei einer bekannten Bauart besitzt das am Greifer befestigte Klemmelement Langlöcher, durch die Schrauben mit Spiel geführt sind, die das Klemmelement befestigen. Dieses Klemmelement kann deshalb in unterschiedlichen Positionen relativ zu dem beweglichen Klemmelement befestigt werden. Bei dieser Bauart ist es relativ aufwendig, das stationäre Klemmelement in einer den zu klemmenden Schußfaden angepaßten Position auszurichten.In rapier weaving a willing held weft yarn is picked up by a Gebergreifer on the entry side of a shed, clamped and entered into the shed. In about the middle of the shed of the weft thread is taken over by a gripper rapier, which keeps this thread clamped and transported to the opposite side of the shed. For clamping the weft thread Gebergreifer and / or gripper grab a thread clamp with two clamping elements, between which a weft thread is clamped. One of the clamping elements is fixedly attached to the gripper and the other is relatively movable. In a known type, the clamping element attached to the gripper has elongated holes through which screws are guided with play, which fasten the clamping element. Therefore, this clamping element can be fastened in different positions relative to the movable clamping element. In this design, it is relatively expensive to align the stationary clamping element in a position adapted to be clamped weft thread position.

Der Erfindung liegt die Aufgabe zugrunde, eine verbesserte Fadenklemme fĂĽr Greifer zu schaffen.The invention has for its object to provide an improved thread clamp for grippers.

Diese Aufgabe wird dadurch gelöst, daß der Klemmabschnitt wenigstens eines der Klemmelemente relativ zu dem Klemmabschnitt des anderen Klemmelementes und zu seinem Grundkörper einstellbar ist.This object is achieved in that the clamping portion of at least one of the clamping elements is adjustable relative to the clamping portion of the other clamping element and to its base body.

Aufgrund der Einstellbarkeit des Klemmabschnittes relativ zu seinem Grundkörper und damit auch relativ zu dem Klemmabschnitt des anderen Klemmelementes ist es in einfacher Weise möglich, die Position der Klemmabschnitte an den zu klemmenden Schußfaden anzupassen, ohne daß dabei die Position geändert wird, in der die Fadenklemme an dem Greifer befestigt ist.Due to the adjustability of the clamping portion relative to its base body and thus also relative to the clamping portion of the other clamping element, it is possible in a simple manner to adapt the position of the clamping portions of the weft to be clamped, without causing the position is changed, in which the thread clamp attached to the gripper.

In vorteilhafter Ausgestaltung der Erfindung wird vorgesehen, daß zwischen dem Grundkörper des Klemmelementes und dem verstellbaren Klemmabschnitt eine mittels einer Einstelleinrichtung elastisch verformbare Verbindungsstelle vorgesehen ist. Bei einer anderen Ausführungsform ist vorgesehen, daß der Klemmabschnitt an dem Grundkörper mittels eines Halteteils angebracht ist, und daß eine verformbare Verbindungsstelle zwischen Klemmabschnitt und Halteteil vorgesehen ist. Diese elastisch verformbare Verbindungsstelle erlaubt das Einstellen des Klemmabschnittes, ohne daß dabei verschleißgefährdete Teile vorgesehen werden müssen.In an advantageous embodiment of the invention, it is provided that between the base body of the clamping element and the adjustable clamping portion is provided by means of an adjustment elastically deformable connection point. In another embodiment, it is provided that the clamping portion is attached to the base body by means of a holding part, and that a deformable connection point between the clamping portion and holding part is provided. This elastically deformable connection point allows the adjustment of the clamping section, without the need to provide wear-prone parts.

Bei einer vorteilhaften Weiterbildung wird vorgesehen, daß die Einstelleinrichtung eine Einstellschraube enthält, die im Bereich der Verbindungsstelle zwischen dem Grundkörper oder dem Halteteil und dem Klemmabschnitt angeordnet ist. Damit ist eine stufenlose Einstellung des Klemmabschnittes relativ zu dem anderen möglich.In an advantageous embodiment, it is provided that the adjusting device includes an adjusting screw which is arranged in the region of the connection point between the base body or the holding part and the clamping portion. For a stepless adjustment of the clamping portion relative to the other is possible.

In weiterer Ausgestaltung der Erfindung wird vorgesehen, daß das bewegliche Klemmelement einen einen Klemmabschnitt bildende Blattfeder ist, deren dem Klemmabschnitt abgewandtes Ende an einer Verlängerung des Grundkörpers des anderen Klemmelementes befestigt ist. Das bietet den Vorteil, daß das bewegliche Klemmelement leicht ausgeführt werden kann.In a further embodiment of the invention it is provided that the movable clamping element forming a clamping portion Leaf spring is whose end facing away from the clamping portion is attached to an extension of the main body of the other clamping element. This offers the advantage that the movable clamping element can be easily performed.

In weiterer Ausgestaltung der Erfindung wird vorgesehen, daĂź die Einstelleinrichtung oder Einstelleinrichtungen mit Mitteln zum Begrenzen des Einstellweges versehen sind. Damit wird sichergestellt, daĂź das Verstellen des Klemmabschnittes nicht so weit erfolgt, daĂź in der Verbindungsstelle eine plastische Verformung auftritt.In a further embodiment of the invention it is provided that the adjusting or adjusting means are provided with means for limiting the Einstellweges. This ensures that the adjustment of the clamping portion is not so far that a plastic deformation occurs in the joint.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung der in der Zeichnung dargestellten AusfĂĽhrungsbeispiele.

Fig. 1
zeigt eine perspektivische Darstellung eines Gebergreifers mit einer erfindungsgemäßen Fadenklemme,
Fig. 2
einen Schnitt entlang der Linie II-II der Fig. 3 des Gebergreifers nach Fig. 1,
Fig. 3
einen Schnitt entlang der Linie III-III der Fig. 2 in der SchlieĂźstellung der Fadenklemme,
Fig. 4
einen Schnitt entsprechend Fig. 3 bei maximaler Verstellung des Klemmabschnittes eines Klemmelementes,
Fig. 5
einen Schnitt ähnlich Fig. 3 in der anderen Endstellung des Klemmabschnittes bei geöffneter Fadenklemme,
Fig. 6
einen Schnitt ähnlich Fig. 3 durch eine abgewandelte Ausführungsform mit einer weiteren Einstellmöglichkeit,
Fig. 7
die AusfĂĽhrungsform nach Fig. 6 in einer Endstellung der zweiten Einstelleinrichtung und
Fig. 8
eine weitere Ausführungsform in einem Schnitt ähnlich Fig. 3.
Further features and advantages of the invention will become apparent from the following description of the embodiments illustrated in the drawings.
Fig. 1
shows a perspective view of a Gebergreifers with a thread clamp according to the invention,
Fig. 2
1 is a section along the line II-II of FIG. 3 of the Geberreifers of FIG. 1,
Fig. 3
a section along the line III-III of FIG. 2 in the closed position of the thread clamp,
Fig. 4
a section corresponding to FIG. 3 with maximum adjustment of the clamping portion of a clamping element,
Fig. 5
3 is a section similar to FIG. 3 in the other end position of the clamping section with the thread clamp open;
Fig. 6
a section similar to FIG. 3 by a modified embodiment with a further adjustment,
Fig. 7
the embodiment of FIG. 6 in an end position of the second adjustment and
Fig. 8
a further embodiment in a section similar to FIG. 3.

In Fig. 1 bis 5 ist ein Gebergreifer 1 dargestellt, der zum Eintragen eines Schußfadens 2 in ein Webfach 3 dient, das zwischen Kettfädenebenen 4 und 5 gebildet ist. Der Gebergreifer 1 ist in bekannter Weise mittels Schrauben 6 am vorderen Ende eines Greiferbandes 7 befestigt. Das Greiferband 7 wird mittels nicht dargestellter Antriebsmittel angetrieben und mit dem Gebergreifer 1 in das Webfach 3 hinein- und wieder aus dem Webfach 3 herausbewegt, um einen Schußfaden 2 in das Webfach 3 einzubringen. Der Gebergreifer 1 besitzt ein hohlkammerartiges Gehäuse 19, das aus mehreren Abschnitten 8, 9, 10, 11 und 12 eines gebogenen Bleches gebildet ist. Das Blech ist beispielsweise aus Stahl, aus einer Aluminiumlegierung oder aus einem anderen Metall. An dem Gehäuse 19 ist im Bereich des Abschnittes 12 eine Fadenklemme 13 für einen Schußfaden 2 mittels Schrauben 14, 15 befestigt. Die Schrauben 14, 15 greifen durch quer zur Greiferlängsrichtung gerichtete Langlöcher 16, 17, so daß die Fadenklemme 13 in einer vorwählbaren Position am Greifergehäuse 19 befestigt werden kann.In Fig. 1 to 5, a Gebergreifer 1 is shown, which serves for introducing a weft yarn 2 in a shed 3, which is formed between warp threads 4 and 5. The Gebergreifer 1 is fixed in a known manner by means of screws 6 at the front end of a rapier band 7. The gripper belt 7 is driven by means not shown drive means and zoom in with the Gebergreifer 1 in the shed 3 and moved back out of the shed 3 to bring a weft 2 in the shed 3. The Gebergreifer 1 has a hollow chamber-like housing 19 which is formed of a plurality of sections 8, 9, 10, 11 and 12 of a bent sheet. The sheet metal is for example made of steel, an aluminum alloy or another metal. On the housing 19, a thread clamp 13 for a weft thread 2 by means of screws 14, 15 is attached in the region of the section 12. The screws 14, 15 engage through transversely to the gripper longitudinal direction directed slots 16, 17, so that the thread clamp 13 can be fixed in a preselectable position on the hook body 19.

Die Fadenklemme 13 besitzt einen Grundkörper 18, der mittels der Schrauben 14, 15 stationär an dem Abschnitt 12 des Greifergehäuses 19 befestigt ist. Der stationär montierte Grundkörper 18 ist einteilig mit einem Klemmabschnitt 20, der mit seiner Unterseite eine Klemmfläche 21 für einen Schußfaden bildet. An dem Grundkörper 18 ist mittels der Schrauben 14, 15 zusätzlich eine Fadenführung 22 befestigt, die den Schußfaden 2 zum Bereich des Bodens des Greifergehäuses 19 nach unten führt, bis der Schußfaden 2 gegen einen Anschlag 23 der Fadenführung 22 anläuft.The thread clamp 13 has a base body 18 which is fixed by means of the screws 14, 15 fixed to the portion 12 of the gripper housing 19. The stationary mounted base body 18 is integral with a clamping portion 20 which forms with its underside a clamping surface 21 for a weft thread. On the main body 18, a thread guide 22 is additionally attached by means of the screws 14, 15, which leads the weft yarn 2 to the region of the bottom of the gripper housing 19 down until the weft yarn 2 starts against a stop 23 of the yarn guide 22.

Die Fadenklemme 13 enthält weiter ein bewegliches Klemmelement 24, das aus einer Blattfeder besteht, die beispielsweise aus Federstahl ist. Die Blattfeder bildet mit ihrer Oberseite einen Klemmabschnitt 25 für den Schußfaden 2, der der Klemmfläche 21 des Klemmabschnittes 20 des stationären Klemmelementes 20 gegenüberliegt. Das dem Klemmabschnitt 25 abgewandte Ende 26 des beweglichen Klemmelementes 24 ist mittels einer Schraube 28 an einer Verlängerung 27 des stationären Grundkörpers 18 angebracht. Aufgrund einer Vorspannung übt das Klemmelement 24 eine definierte Klemmkraft in seinen Klemmabschnitt 25 auf den Klemmabschnitt 20 aus. Die Klemmfläche 21 des Klemmabschnittes 20 ist mit einer im Querschnitt im wesentlichen dreieckförmigen Rippe versehen, die mit einer Nut 29 des beweglichen Klemmelementes 24 zusammenwirkt.The thread clamp 13 further includes a movable clamping member 24 which consists of a leaf spring, which is for example made of spring steel. The leaf spring forms with its top a clamping portion 25 for the weft yarn 2, which is opposite to the clamping surface 21 of the clamping portion 20 of the stationary clamping element 20. The clamping section 25 facing away from the end 26 of the movable clamping element 24 is attached by means of a screw 28 to an extension 27 of the stationary base body 18. Due to a bias, the clamping element 24 exerts a defined clamping force in its clamping portion 25 on the clamping portion 20. The clamping surface 21 of the clamping portion 20 is provided with a cross-sectionally substantially triangular rib which cooperates with a groove 29 of the movable clamping element 24.

Wenn der Gebergreifer 1 - wie in Fig. 1 dargestellt - dem Webfach 3 zugestellt wird, so nimmt er einen Schußfaden 2 auf, der zwischen einer Zuführnadel 32 und dem Gewebe 33 bereitgehalten wird. Der Schußfaden 2 wird unterhalb des Abschnittes 9 mittels der Ränder von Ausschnitten der Abschnitte 10 und 12 geführt, bis er gegen die Anschläge 34 und 35 des Greifergehäuses 19 anläuft. Dabei wird der Schußfaden 2 von der Fadenklemme 13 aufgenommen und läuft gegen den Anschlag 23 der Fadenführung 22 an. Zwischen dem Anschlag 23 und dem Anschlag 35 läuft der Schußfaden, wie in dem Querschnitt nach Fig. 2 zu sehen ist, unter einem Winkel H von etwa 50° zu dem Abschnitt 11, der den Boden des Greifergehäuses 19 bildet. Der Schußfaden 2 ist in der Fadenklemme 13 zwischen dem Anschlag 34 und dem Anschlag 23 geklemmt. Sobald der Schußfaden 2 in der Fadenklemme 13 geklemmt gehalten wird, wird er mittels einer nicht dargestellten Schußfadenschere im Bereich des Gewebes 33 abgeschnitten und anschließend in das Webfach 3 eingetragen. Bei diesem Eintrag wird der Schußfaden 2 von einem nicht dargestellten Fadenvorrat abgezogen, insbesondere von einem Vorspulgerät oder aber auch von einer Spule.When the gripper 1 - as shown in Fig. 1 - the shed 3 is delivered, so he takes a weft yarn 2, which is held between a feed needle 32 and the fabric 33. The weft yarn 2 is guided below the portion 9 by means of the edges of cutouts of the portions 10 and 12 until it starts against the stops 34 and 35 of the gripper housing 19. In this case, the weft thread 2 is received by the thread clamp 13 and runs against the stop 23 of the thread guide 22 at. Between the stop 23 and the stop 35 of the weft thread, as can be seen in the cross section of Fig. 2, at an angle H of about 50 ° to the portion 11, which forms the bottom of the gripper housing 19. The weft thread 2 is clamped in the thread clamp 13 between the stopper 34 and the stopper 23. Once the weft yarn 2 is held clamped in the thread clamp 13, it is cut off by means of a weft cutter, not shown, in the region of the fabric 33 and then entered into the shed 3. In this entry, the weft yarn 2 is withdrawn from a thread supply, not shown, in particular from a Vorspulgerät or even from a coil.

Der Klemmabschnitt 20 ist relativ zu seinem Grundkörper 18 und zu dem Klemmabschnitt 25 des beweglichen Klemmelementes 24 einstellbar, um den Winkel A (Fig. 3) zwischen der Klemmfläche 21 und dem Klemmabschnitt 25 einzustellen, der bei geschlossener Fadenklemme 13 vorhanden ist. Hierfür ist zwischen dem Klemmabschnitt 20 und dem Grundkörper 18 eine elastisch verformbare Verbindungsstelle 37 vorgesehen. Diese besteht bei dem Ausführungsbeispiel aus einem schmalen Steg, der in der Nähe der Unterseite vorhanden ist und der mittels einer Ausfräsung 38 erhalten worden ist. In Abstand zu der elastisch verformbaren Verbindungsstelle 37 ist eine Einstellschraube 39 vorgesehen, die in eine Auskragung 40 des Grundkörpers 18 eingeschraubt ist und die sich gegenüber an einer Seitenwand 41 der Ausfräsung 38 abstützt. Um die Einstellschraube 39 in der Auskragung 40 des Grundkörpers 18 zu sichern, ist eine Kontermutter 42 vorgesehen.The clamping portion 20 is adjustable relative to its base body 18 and to the clamping portion 25 of the movable clamping member 24 to adjust the angle A (FIG. 3) between the clamping surface 21 and the clamping portion 25 provided with the thread clamp 13 closed. For this purpose, an elastically deformable connection point 37 is provided between the clamping portion 20 and the base body 18. This consists in the embodiment of a narrow web, which is present in the vicinity of the bottom and which has been obtained by means of a cutout 38. At a distance from the elastically deformable connection point 37, an adjusting screw 39 is provided, which is screwed into a projection 40 of the base body 18 and which is supported against a side wall 41 of the cutout 38. In order to secure the adjusting screw 39 in the projection 40 of the base body 18, a lock nut 42 is provided.

Wenn die Einstellschraube 39 weiter in die Auskragung 40 eingeschraubt wird, wie das in Fig. 4 dargestellt wird, so wird die elastisch verformbare Verbindungsstelle 37 verformt, so daĂź sich anstelle des Winkels A der Winkel D ergibt. Mittels der Einstellschraube 39 ist die Position des Klemmabschnittes 20 stufenlos einstellbar.If the adjusting screw 39 is further screwed into the projection 40, as shown in Fig. 4, the elastically deformable joint 37 is deformed, so that instead of the angle A, the angle D results. By means of the adjusting screw 39, the position of the clamping portion 20 is infinitely adjustable.

Die insgesamt mit 30 bezeichnete Einstelleinrichtung des Klemmabschnittes 20 ist ferner mit einer Wegbegrenzung versehen, um den Verstellweg so zu begrenzen, daß der Bereich der elastischen Verformung nicht überschritten wird. Bei dem Ausführungsbeispiel ist hierzu an der Auskragung 40 ein hakenförmiges Anschlagelement 70 vorgesehen, das mit einer Anschlagfläche 71 hinter eine Anschlagfläche 73 des Klemmabschnittes 20 greift. Wenn die Anschlagfläche 73 sich an die Anschlagfläche 71 anlegt, ist die maximale Einstellung des Klemmabschnittes 20 erreicht. Damit wird verhindert, daß die elastische Verbindungsstelle 37 so stark verformt wird, daß eine palstische Verformung auftritt. Eine plastische Verformung würde die Fadenklemme 13 insgesamt beschädigen, da sie nicht mehr zurück in eine gewünschte Winkelstellung gebracht werden kann. Durch dieses Einstellen kann der Winkel zwischen dem Bereich A und D an die zu verarbeitenden Schußfäden angepaßt und entsprechend eingestellt werden, ohne daß die Position des Grundkörpers 18 gegenüber dem Gebergreifer 1 verändert wird. Durch das Zusammenwirken der elastisch verformbaren Verbindungsstelle 37 und der Einstellschraube 39 wird das Einstellen des Klemmabschnittes 20 nicht durch Reibung und/oder Spiel und/oder Verschleiß der Einstellmittel beeinflußt. Die Einstellung kann beliebig wieder verändert werden, ohne daß sich das auf die Einstellmittel auswirkt. Es kann eine präzise und vor allem stufenlose Anpassung des Winkels A bis D vorgenommen werden. Dies ist vor allem beim Verweben von Schußfäden wichtig, die aus mehreren dünnen Fäden oder sogenannten Filamenten bestehen, die zusammen einen dickeren Schußfaden bilden. Je mehr Filamente vorhanden sind und je dünner diese sind, desto kleiner muß der Winkel A, D gewählt werden.The generally designated 30 setting means of the clamping portion 20 is further provided with a travel limit to limit the adjustment so that the range of elastic deformation is not exceeded. In the embodiment, for this purpose, a hook-shaped stop element 70 is provided on the projection 40, which engages with a stop surface 71 behind a stop surface 73 of the clamping portion 20. When the abutment surface 73 abuts against the abutment surface 71, the maximum adjustment of the clamping portion 20 is achieved. This prevents that the elastic joint 37 is deformed so much that a palstische deformation occurs. A plastic deformation would damage the thread clamp 13 as a whole, since they can not be brought back into a desired angular position. By this setting, the angle between the range A and D can be adapted to the weft threads to be processed and adjusted accordingly, without the position of the base body 18 relative to the Gebergreifer 1 is changed. Due to the interaction of the elastically deformable connection point 37 and the adjusting screw 39, the adjustment of the clamping portion 20 is not influenced by friction and / or play and / or wear of the adjusting means. The setting can be changed again without affecting the setting means. It can be made a precise and above all stepless adjustment of the angle A to D. This is especially important when weaving weft threads, which consist of several thin threads or so-called filaments, which together form a thicker weft thread. The more filaments are present and the thinner they are, the smaller the angle A, D must be selected.

Bei der Einstellung nach Fig. 5 kommt eine Anschlagfläche 72 des hakenförmigen Anschlagelementes 70 in Kontakt mit einer Anschlagfläche 74 des Klemmabschnittes 20, wodurch eine weitere Verformung der elastischen Verbindungsstelle 37 beschränkt wird. Dadurch kann erreicht werden, daß der Klemmabschnitt 20 immer mit einer definierten Kraft gegen die Einstellschraube gedrückt wird, die als Federkraft von der elastischen Verbindungsstelle 37 erzeugt wird.In the setting according to FIG. 5, a stop face 72 of the hook-shaped stop element 70 comes into contact with a stop face 74 of the clamping section 20, whereby a further deformation of the elastic connection point 37 is restricted. It can thereby be achieved that the clamping portion 20 is always pressed with a defined force against the adjusting screw, which is generated as a spring force of the elastic connection point 37.

Das als Blattfeder ausgeführte, bewegliche Klemmelement 24 ist mittels eines Verstellelementes 44, das die Form einer gebogenen Blattfeder hat, so verstellbar, wie dies in Fig. 5 dargestellt ist. Dabei wird der Klemmabschnitt 25 des beweglichen Klemmelementes 24 von der Klemmfläche 21 des stationären Klemmabschnittes 20 wegbewegt, um die Fadenklemme 13 zu öffnen, beispielsweise um sie zu reinigen. Das Verstellelement 44 kann dazu in bekannter Weise mit einem in Fig. 5 angedeuteten Anschlag 45 zusammenwirken, der stationär an einem nicht dargestellten Rahmen der Webmaschine befestigt ist. Dieser Anschlag 45 ist so neben der Bewegungsbahn des Gebergreifers 1 angeordnet, daß er bei Bewegung des Gebergreifers 1 entlang dieses Anschlages 45 das Verstellelement 44 nach innen drückt und damit die Fadenklemme 13 öffnet. Das Verstellelement 44 ist zusammen mit dem beweglichen Klemmelement 24 unter Zwischenfügen eines Zwischenstückes 43 mittels der Schraube 28 an der Verlängerung 27 des Grundkörpers 18 befestigt.The running as a leaf spring, movable clamping member 24 is adjustable by means of an adjusting element 44 which has the shape of a bent leaf spring, as shown in Fig. 5. In this case, the clamping portion 25 of the movable clamping member 24 is moved away from the clamping surface 21 of the stationary clamping portion 20 to open the thread clamp 13, for example, to clean them. The adjusting element 44 may cooperate in a known manner with a direction indicated in Fig. 5 stop 45, which is stationary on a Not shown frame of the loom is attached. This stopper 45 is arranged next to the path of movement of the Gebergreifers 1 that he presses the adjusting element 44 inwardly during movement of Gebergreifers 1 along this stop 45 and thus the thread clamp 13 opens. The adjusting element 44 is fastened together with the movable clamping element 24 with the interposition of an intermediate piece 43 by means of the screw 28 on the extension 27 of the base body 18.

Bei der Ausführungsform nach Fig. 6 und 7 ist die Einstelleinrichtung 30 nicht mit einem hakenförmigen Anschlag zur Begrenzung des Einstellweges versehen. Bei dieser Ausführungsform kann der Einstellweg jedoch dadurch begrenzt werden, daß die Einstellschraube 39 eine entsprechend beschränkte Länge aufweist.In the embodiment according to FIGS. 6 and 7, the adjusting device 30 is not provided with a hook-shaped stop for limiting the setting path. In this embodiment, however, the adjustment can be limited by the fact that the adjusting screw 39 has a correspondingly limited length.

Zusätzlich zu der Einstelleinrichtung 30 ist eine zweite Einstelleinrichtung 31 vorgesehen, mittels der ebenfalls der Winkel zwischen der Klemmfläche 21 des Klemmabschnittes 20 und dem Klemmabschnitt 25 des Klemmelementes 24 verstellt werden kann, wenn die Fadenklemme 13 geschlossen ist. Das Klemmelement 24 ist entsprechend zur Ausführungsform nach Fig. 1 bis 5 ausgeführt und mittels einer Schraube 28 an einer Verlängerung 46 des Grundkörpers 54 des stationären Klemmelementes befestigt. Der Grundkörper 54 ist mit Schrauben 14, 15 an dem Greifergehäuse 19 entsprechend Fig. 1 bis 5 befestigt. Das Verlängerungsteil 46 ist in zwei Abschnitte unterteilt, die mittels einer elastisch verformbaren Verbindungsstelle 47 miteinander verbunden sind. Im Bereich dieser Verbindungsstelle 47 ist ein eingefräster Hohlraum 48 vorgesehen, der beidseits durch Auskragungen 51, 52 begrenzt ist. Einer Einstellschraube 49 ist in die Auskragung 51 eingeschraubt und liegt einer Seitenwand der Auskragung 52 gegenüber. Auf der Einstellschraube 49 ist eine Kontermutter 50 vorgesehen. Die Auskragung 51 ist mit einem hakenförmigen Anschlagelement 75 versehen, das eine Anschlagfläche 76 für eine gegenüberliegende Fläche 77 der Auskragung 52 bildet und auf diese Weise den maximalen Einstellweg begrenzt. Bei dieser Ausführungsform kann mit Hilfe der Einstelleinrichtung 31 die Winkelstellung des Klemmabschnittes 25 des Klemmelementes 24 gegenüber der Klemmfläche 21 des Klemmabschnittes 20 verändert werden, indem entsprechend die Verlängerung 46 im Bereich der elastisch verformbaren Verbindungsstelle 47 verformt wird.In addition to the adjusting device 30, a second adjusting device 31 is provided, by means of which also the angle between the clamping surface 21 of the clamping portion 20 and the clamping portion 25 of the clamping element 24 can be adjusted when the thread clamp 13 is closed. The clamping element 24 is executed according to the embodiment of FIGS. 1 to 5 and fastened by means of a screw 28 to an extension 46 of the base body 54 of the stationary clamping element. The main body 54 is fastened with screws 14, 15 on the gripper housing 19 according to FIGS. 1 to 5. The extension part 46 is divided into two sections, which are connected to each other by means of an elastically deformable connection point 47. In the region of this connection point 47, a milled cavity 48 is provided which is bounded on both sides by projections 51, 52. An adjusting screw 49 is screwed into the projection 51 and is opposite to a side wall of the projection 52. On the adjusting screw 49, a lock nut 50 is provided. The projection 51 is provided with a hook-shaped stop element 75, which has a stop surface 76 for a opposite surface 77 of the projection 52 forms and limited in this way the maximum adjustment. In this embodiment, the angular position of the clamping portion 25 of the clamping element 24 relative to the clamping surface 21 of the clamping portion 20 can be changed by means of the adjusting means 31 by correspondingly the extension 46 in the region of the elastically deformable connection point 47 is deformed.

Wenn bei der Ausführungsform nach Fig. 6 die Einstellschraube 49 verdreht und weiter in die Auskragung 51 eingeschraubt wird, so wird die Verbindungsstelle 47 elastisch verformt. Dadurch verändert sich der Winkel A zwischen der Klemmfläche 21 des Klemmabschnittes 20 und dem Klemmabschnitt 25 des Klemmelementes 24 von dem Winkel A zu dem Winkel E entsprechend Fig. 7. Ein Verdrehen der Einstellschraube 49 hat nur eine relativ kleine Winkelveränderung zwischen der Klemmfläche 21 und dem Klemmabschnitt 25 zur Folge. Dies beruht darauf, daß die elastische Verbindungsstelle 47 in größerem Abstand zu dem Klemmabschnitt 25 des Klemmelementes 24 angeordnet ist und daß außerdem das Klemmelement 24 insgesamt elastisch verformbar ist. Die Winkeleinstellung läßt sich somit mittels einer Einstellschraube relativ fein einstellen, insbesondere wenn die Gewindesteigung der Einstellschraube entsprechend gewählt wird. Da die Einstelleinrichtung 30 und die elastisch verformbare Verbindungsstelle 37 dagegen relativ nahe zu der Klemmfläche 21 des Klemmabschnittes 20 angeordnet ist, führt eine Verstellung der Einstellschraube 39 zu einer relativ großen Winkelveränderung. Dadurch ist es möglich, die Winkeleinstellung mittels der Einstellschraube 39 relativ schnell zu verändern und eine Feineinstellung mittels der Einstellschraube 49 durchzuführen.If in the embodiment of FIG. 6, the adjusting screw 49 is rotated and further screwed into the projection 51, the joint 47 is elastically deformed. As a result, the angle A between the clamping surface 21 of the clamping portion 20 and the clamping portion 25 of the clamping element 24 changes from the angle A to the angle E in accordance with Fig. 7. Turning the adjusting screw 49 has only a relatively small change in angle between the clamping surface 21 and the Pinching 25 result. This is due to the fact that the elastic connection point 47 is arranged at a greater distance from the clamping portion 25 of the clamping element 24 and that, moreover, the clamping element 24 is elastically deformable as a whole. The angle adjustment can thus be adjusted relatively fine by means of an adjusting screw, especially if the thread pitch of the adjusting screw is selected accordingly. By contrast, since the adjusting device 30 and the elastically deformable connection point 37 are arranged relatively close to the clamping face 21 of the clamping section 20, an adjustment of the adjusting screw 39 leads to a relatively large change in angle. This makes it possible to change the angle adjustment by means of the adjusting screw 39 relatively quickly and perform a fine adjustment by means of the adjusting screw 49.

In der in Fig. 7 dargestellten Stellung der Einstellschraube 49 ist die Anschlagfläche 77 der Auskragung 52 gegen die Anschlagfläche 76 des hakenförmigen Anschlags 75 angelaufen. Damit wird der Einstellweg beschränkt, wobei die Beschränkung in dieser Weise erfolgt, daß die elastische Verbindungsstelle 47 nicht plastisch deformiert wird.In the position of the adjusting screw 49 shown in FIG. 7, the abutment surface 77 of the projection 52 has started against the abutment surface 76 of the hook-shaped stop 75. This restricts the adjustment path, with the restriction in this way, that the elastic joint 47 is not plastically deformed.

Mit einer Fadenklemme 13 gemäß der Ausführungsform nach Fig. 6 und 7 kann auch mittels der Einstelleinrichtung 31 die Kraft eingestellt werden, die von dem Klemmabschnitt 25 des Klemmelementes 24 auf die Klemmfläche 21 des Klemmabschnittes 20 ausgeübt wird. Diese Fadenklemme 13 kann beispielsweise in folgender Weise eingestellt werden. Zunächst wird durch Verdrehen der Einstellschraube 49 die Klemmkraft festgelegt, die das Klemmelement 24 mit seinem Klemmabschnitt 25 auf die Klemmfläche 21 des Klemmabschnittes 20 des anderen Klemmelementes ausübt. Danach wird dann die Winkelstellung zwischen der Klemmfläche 21 des Klemmabschnittes 20 zu dem Klemmabschnitt 25 mittels der Einstellschraube 39 auf einen gewünschten Winkel eingestellt. Dies kann erfolgen, bevor der Grundkörper 54 an dem Greifergehäuse 19 befestigt ist, oder aber auch danach. Wenn während eines Webens festgestellt wird, daß die Fadenklemme 13 den Schußfaden nicht optimal klemmt, kann die Fadenklemme 13 mittels der Einstelleinrichtungen 30 und/oder 31 nachgestellt werden, ohne daß die Fadenklemme 13 aus dem Greifergehäuse 19 ausgebaut wird.With a thread clamp 13 according to the embodiment of FIGS. 6 and 7, the force can be adjusted by means of the adjusting device 31, which is exerted by the clamping portion 25 of the clamping element 24 on the clamping surface 21 of the clamping portion 20. This thread clamp 13 can be adjusted for example in the following manner. First, the clamping force is determined by turning the adjusting screw 49, which exerts the clamping element 24 with its clamping portion 25 on the clamping surface 21 of the clamping portion 20 of the other clamping element. Thereafter, the angular position between the clamping surface 21 of the clamping portion 20 is then adjusted to the clamping portion 25 by means of the adjusting screw 39 to a desired angle. This can be done before the main body 54 is attached to the gripper housing 19, or even afterwards. If it is determined during weaving that the thread clamp 13 does not optimally clamp the weft thread, the thread clamp 13 can be readjusted by means of the adjusting devices 30 and / or 31 without the thread clamp 13 being removed from the hook housing 19.

Bei der Ausführungsform nach Fig. 6 und 7 ist der Klemmabschnitt 20 mit einem Halteteil 36 versehen, das mittels einer oder mehrerer Schrauben 53 stationär an dem Grundkörper 54 des Klemmelementes befestigt ist. Die verformbare Verbindungsstelle 37 und die Einstelleinrichtung 30 sind bei dieser Ausführungsform zwischen dem Halteteil 36 und dem Klemmabschnitt 20 vorgesehen.In the embodiment of FIGS. 6 and 7, the clamping portion 20 is provided with a holding part 36 which is fixed by means of one or more screws 53 stationary on the base body 54 of the clamping element. The deformable connection point 37 and the adjusting device 30 are provided in this embodiment between the holding part 36 and the clamping portion 20.

Selbstverständlich ist es auch möglich, mehr als die beiden Einstelleinrichtungen 30, 31 mit den elastisch verformbaren Verbindungsstellen 37, 47 vorzusehen, die dann auch an anderen Stellen zwischen dem stationären Grundkörper 54 und der Verlängerung 46 oder dem Halteteil 36 angeordnet werden.Of course, it is also possible to provide more than the two adjusting devices 30, 31 with the elastically deformable connection points 37, 47, which are then arranged at other locations between the stationary base body 54 and the extension 46 or the holding part 36.

Für das bewegliche Klemmelement 24 können auch andere Betätigungsmittel als Verstellelement vorgesehen werden, um die Fadenklemme 13 zu öffnen.For the movable clamping element 24 and other actuating means can be provided as adjusting to open the thread clamp 13.

In Fig. 8 ist eine abgewandelte Ausführungsform dargestellt, die ein stationär angeordnetes Klemmelement 61 mit einem Klemmabschnitt 25 aufweist. Das Klemmelement 61 ist einteilig mit einer Halterung 55 ausgebildet, die mittels Schrauben 14, 15 stationär am Greifergehäuse 19 befestigt ist. Dem Klemmabschnitt 25 des stationären Klemmelementes 61 ist ein beweglicher Klemmabschnitt 60 mit einer Klemmfläche 21 zugeordnet. Der Klemmabschnitt 60 ist einteilig mit einem zweiarmigen Hebel 57 ausgeführt, der um eine Achse 56 schwenkbar an der Halterung 55 gelagert ist. Zwischen dem Hebel 57 und dem nach hinten verlängerten stationären Klemmelement 60 ist eine Druckfeder 58 angeordnet, die die Klemmabschnitte 60, 61 gegeneinander andrückt. Der Hebelarm 59 des Hebels, der den Klemmabschnitt 60 aufweist, ist mit einer Einstelleinrichtung 30 entsprechend dem Ausführungsbeispiel nach Fig. 1 bis 5 versehen, mittels der der Winkel B eingestellt werden kann. Zum Öffnen des Fadenklemme wird der Hebel 57 gegen die Wirkung der Druckfeder 58 mittels eines nicht dargestellten Anschlags im Gegenuhrzeigersinn um die Achse 56 geschwenkt.In Fig. 8, a modified embodiment is shown, which has a stationary arranged clamping element 61 with a clamping portion 25. The clamping element 61 is integrally formed with a holder 55 which is fixed by means of screws 14, 15 on the gripper housing 19. The clamping section 25 of the stationary clamping element 61 is assigned a movable clamping section 60 with a clamping surface 21. The clamping portion 60 is integrally formed with a two-armed lever 57 which is pivotally mounted about an axis 56 on the holder 55. Between the lever 57 and the rearwardly extended stationary clamping element 60, a compression spring 58 is arranged, which presses the clamping portions 60, 61 against each other. The lever arm 59 of the lever, which has the clamping portion 60, is provided with an adjusting device 30 according to the embodiment of FIGS. 1 to 5, by means of which the angle B can be adjusted. To open the thread clamp the lever 57 is pivoted against the action of the compression spring 58 by means of a stop, not shown counterclockwise about the axis 56.

Bei der Ausführungsform nach Fig. 8 ist die Auskragung 40 mit einem hakenförmigen Anschlag 78 versehen, der eine Anschlagfläche 79 bildet, der eine Anschlagfläche 80 des Klemmabschnittes 60 zugeordnet ist. Mittels dieses hakenförmigen Anschlags 78 ist auch bei dieser Ausführungsform der Einstellweg begrenzt.In the embodiment of Fig. 8, the projection 40 is provided with a hook-shaped stopper 78 which forms a stop surface 79, which is associated with a stop surface 80 of the clamping portion 60. By means of this hook-shaped stop 78 is limited in this embodiment, the adjustment.

Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt. Insbesondere sind Kombinationen zwischen den Ausführungsbeispielen möglich. Beispielsweise ist es auch möglich, anstatt der elastisch verformbaren Verbindungsstellen 37 oder 47 echte Gelenke vorzusehen, mittels derer die gleiche Funktion erhalten wird. Die elastischen Verbindungsstellen 37, 47 haben jedoch den Vorteil, daß sie keinem Verschleiß unterliegen und spielfrei sind. Statt der hakenförmigen Anschläge 70, 75, 78, die die Einstellwege der Einstelleinrichtungen 30, 31 begrenzen, können auch andere Maßnahmen vorgesehen werden. Beispielsweise läßt sich die gleiche Wirkung auch dadurch erzielen, daß die Länge der Einstellschrauben 39, 49 so gewählt wird, daß der Bereich einer plastischen Deformation mit Sicherheit nicht erreicht wird. Darüber hinaus ist es selbstverständlich auch möglich, im Bereich der elastischen Verbindungsstellen 37, 47 andere Einstellmittel vorzusehen, durch deren Einstellen eine elastische Verformung dieser Verbindungsstellen 37, 47 erreicht wird, beispielsweise durch Spreizelemente, die in den Aussparungen 38, 48 eingesetzt werden.The invention is not limited to the illustrated embodiments. In particular, combinations between the embodiments are possible. For example, it is also possible to provide instead of the elastically deformable joints 37 or 47 real joints, by means of which the same function is obtained. The elastic joints 37, 47 have the advantage that they are not subject to wear and are free of play. Instead of the hook-shaped stops 70, 75, 78, which limit the adjustment paths of the adjusting devices 30, 31, other measures can be provided. For example, the same effect can also be achieved in that the length of the adjusting screws 39, 49 is selected so that the range of plastic deformation is certainly not reached. In addition, it is of course also possible to provide other adjustment means in the region of the elastic connection points 37, 47, by the adjustment of which an elastic deformation of these connection points 37, 47 is achieved, for example by spreading elements, which are inserted into the recesses 38, 48.

In den dargestellten und erläuterten Ausführungsbeispielen ist die Fadenklemme als Bestandteil eines Gebergreifers offenbart worden. Selbstverständlich kann eine entsprechend gestaltete Fadenklemme aber auch in einem Nehmergreifer vorgesehen werden.In the illustrated and illustrated embodiments, the thread clamp has been disclosed as part of a Gebergreifers. Of course, a suitably designed thread clamp but also be provided in a gripper rapier.

Claims (10)

  1. A thread clamp (13) for a gripper (1) of a gripper loom with two clamp elements for clamping a weft thread, both each having a clamping section (20, 25), whereby both the clamping sections are opposite to one another, characterized in that the clamping section (20, 25) of at least one of the clamping elements is adjustable in relation to the clamping section (25, 20) of the other clamping element and to its body (18, 54, 59).
  2. A thread clamp according to claim 1, characterized in that there is a connecting site (37, 47) between the body (18, 54, 59) of the clamping element and the adjustable clamping section (20, 25) which is elastically deformable via an adjuster (30, 31).
  3. A thread clamp according to claim 1 or 2, characterized in that the clamping section (20) is affixed to the body (54) via a holding part (36), and a deformable connecting site (37) is provided between the clamping section (20) and the holding part (36).
  4. Thread clamp according to claim 2 or 3, characterized in that the adjuster (30, 31) contains an adjustment screw (39, 49) which is in the vicinity of the connecting site (37, 47).
  5. Thread clamp according to one of claims 1 to 4, characterized that one clamping element is stationary, and one clamping element (24) is movable in relation to the stationary clamping element, and that the stationary clamping element is provided with the adjustable clamping section (20).
  6. Thread clamp according to claim 5, characterized in that there is a stationary clamping element and a clamping element movable in relation to the stationary clamping element, and that the movable clamping element (24) is a leaf spring forming a clamping section (25) wherein the end (26) which faces away from the clamping section (25) is affixed to an extension (27, 46) of the body (18, 54) of the other clamping element.
  7. Thread clamp according to claim 6, characterized in that the position of the extension (46) of the body (54) is adjustable in relation to the body (54).
  8. Thread clamp according to one of claims 1 to 7, characterized in that the movable clamping element contains a hinged lever (57, 59) that is provided with a clamping section (20) settable relative to a lever arm (59).
  9. Thread clamp according to one of claims 1 to 8, characterized in that least one adjuster (30, 31) is provided with means (70, 75, 78) to limit the setting path.
  10. Thread clamp according to one of claims 1 to 9, characterized in that one of the clamping sections (20) is provided with a lengthwise rib which is assigned a lengthwise groove (29) in the opposing clamping section (25).
EP99950613A 1998-10-21 1999-10-05 Thread gripper for a rapier of a rapier loom Expired - Lifetime EP1127181B2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
BE9800755A BE1012242A3 (en) 1998-10-21 1998-10-21 Gripper loom
BE9800755 1998-10-21
BE9900070A BE1012459A6 (en) 1999-02-03 1999-02-03 Thread guide for a gripper on a rapier loom
BE9900070 1999-02-03
PCT/EP1999/007353 WO2000023642A1 (en) 1998-10-21 1999-10-05 Thread gripper for a rapier of a rapier loom

Publications (3)

Publication Number Publication Date
EP1127181A1 EP1127181A1 (en) 2001-08-29
EP1127181B1 true EP1127181B1 (en) 2006-01-04
EP1127181B2 EP1127181B2 (en) 2010-07-28

Family

ID=25663151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99950613A Expired - Lifetime EP1127181B2 (en) 1998-10-21 1999-10-05 Thread gripper for a rapier of a rapier loom

Country Status (5)

Country Link
US (1) US6453952B1 (en)
EP (1) EP1127181B2 (en)
AT (1) ATE315119T1 (en)
DE (1) DE59913024D1 (en)
WO (1) WO2000023642A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50213973D1 (en) * 2002-09-20 2009-12-10 Picanol Nv GRIPPERS FOR A GRIPPER WEAVING MACHINE
EP1918437A1 (en) * 2006-11-02 2008-05-07 Sultex AG Method and device for weft insertion
BE1018774A3 (en) 2009-06-10 2011-08-02 Picanol Nv GRIP UNIT, CONTROL UNIT FOR A GRIP UNIT AND WEAVING MACHINE.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1066091B (en) * 1976-12-27 1985-03-04 Somet Soc Mec Tessile TRACTOR PLIER FOR WEAVING FRAMES WITH CONTINUOUS WEFT FEED
BE902141A (en) * 1985-04-09 1985-10-09 Picanol Nv IMPROVED GRAPHERS FOR WEAVING MACHINES.
IT1245579B (en) * 1991-03-22 1994-09-29 Somet Soc Mec Tessile CARRIER GRIPPER FOR WEAVING FRAMES WITHOUT SHUTTLE
EP0644286B1 (en) * 1993-09-20 1997-04-16 Sulzer RĂ ÂśTi Ag Arrangement to feed weft yarns
CH692457A5 (en) * 1997-07-29 2002-06-28 Gividi Italia Spa drawing gripper for weaving looms in spears and use the pliers.
BE1011480A3 (en) * 1997-10-03 1999-10-05 Picanol Nv GRAVELER FOR A GRAPER WEAVING MACHINE.

Also Published As

Publication number Publication date
US6453952B1 (en) 2002-09-24
EP1127181B2 (en) 2010-07-28
WO2000023642A1 (en) 2000-04-27
ATE315119T1 (en) 2006-02-15
EP1127181A1 (en) 2001-08-29
DE59913024D1 (en) 2006-03-30

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