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EP0441099A1 - Weft carrying gripper for gripper looms - Google Patents

Weft carrying gripper for gripper looms Download PDF

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Publication number
EP0441099A1
EP0441099A1 EP90810955A EP90810955A EP0441099A1 EP 0441099 A1 EP0441099 A1 EP 0441099A1 EP 90810955 A EP90810955 A EP 90810955A EP 90810955 A EP90810955 A EP 90810955A EP 0441099 A1 EP0441099 A1 EP 0441099A1
Authority
EP
European Patent Office
Prior art keywords
thread
gripper
clamp
head part
guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90810955A
Other languages
German (de)
French (fr)
Other versions
EP0441099B1 (en
Inventor
Angelo Stacher
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.)
Itema Switzerland Ltd
Original Assignee
Sulzer AG
Sultex AG
Gebrueder Sulzer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sulzer AG, Sultex AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0441099A1 publication Critical patent/EP0441099A1/en
Application granted granted Critical
Publication of EP0441099B1 publication Critical patent/EP0441099B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12—Looms 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
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers
    • D03D47/233—Carrying grippers

Definitions

  • the invention relates to a rapier rapier for rapier weaving machines with a head part attached to a flexible entry belt, as well as a method for operating the rapier rapier according to the invention and a ribbon rapier weaving machine with such a rapier.
  • the rapier gripper In rapier weaving machines, the rapier gripper carries the weft thread with its head part, which has a suitable thread guide and a thread clamp, into the central area of the shed, where it is taken over by the slave gripper.
  • the tasks of the bringer gripper to grasp the thread safely, not to lose it and to feed it precisely to the slave gripper require a fairly robust and therefore massive construction.
  • the gripper slides on runners which are located at the lower ends of the two side walls. These runners put a heavy load on the warp threads, which can damage them.
  • the side walls of the bringer gripper head are connected by a bridge-like top. The focus of this construction is high. Since the flexible belt, which moves the head section through the shed, runs directly over the warp threads, the high center of gravity results in a torque that is one movement which is difficult to control and tends to lift off the head part.
  • the gripper of the CH-PS 592.761 still has other disadvantages.
  • the tip of the held weft thread emerges from the underside of the hook and slides over the warp threads.
  • the weft thread tip can also get between runners and warp threads. This can cause damage to both the warp threads and the weft end.
  • Another disadvantage is the complicated arrangement of a suction nozzle below the gripper guideway.
  • the head part of the bringer gripper is largely open at the top and has an essentially partly convex, partly flat sliding surface, that the gripper has a high-lying guide for the weft thread and a thread clamp, the guide and clamp being arranged in this way that they present the thread diagonally, at an angle to the tissue plane of less than 45 degrees, through the free interior of the head part to the slave gripper.
  • the thread guide is designed in such a way that the thread is also deflected and fed to the clamp at the correct point.
  • the advantage of the invention can be seen in the fact that the center of gravity of the gripper head is low and that this enables a movement of the gripper that is less prone to lifting off. Thanks to the wide sliding surface of the hook head, which is flat or convex, the warp threads are protected. In addition, the open top gripper head allows good insight for control purposes and good accessibility, especially to the thread clamp, which is advantageous in terms of cleaning and repair options.
  • the bringer gripper head according to the invention has a one-piece base body which can be manufactured inexpensively from sheet metal.
  • the thread clamp is attached to this body.
  • the thread guide which is arranged on the upper edge of the reed-side gripper wall, can be produced, for example, simply by bending the sheet metal from which the base body is made.
  • the thread guide can also be produced by means of an indentation broken out of the hook wall.
  • the base body of the bringer gripper head according to the invention is shaped like a sheath, so that the slave gripper can penetrate into its interior and take over the weft thread presented there.
  • the thread clamp is arranged in the interior so that there is still free space for the slave gripper. it is located immediately next to the gripper wall on the goods side.
  • With a rigid, fin-shaped lamella attached to the clamp the weft thread coming from the high-lying thread guide is deflected against the bottom of the hook head before the thread is then guided upwards again to the clamping point.
  • the thread deflection fin of the clamp results in a thread guide in the hook head, which runs diagonally through the interior space which is free for the slave hook.
  • the thread clamp which is essentially already known except for the thread deflection fin (DE-PS 29.47.399), holds the weft thread with its clamping point in the horizontal direction. Thanks to this, the thread end protrudes from the hook through a trough in the side wall and therefore does not come into contact with the warp threads, which rules out mutual interference between the weft thread and the warp thread.
  • the clamping point provided in the bringer gripper according to the invention and the associated trough in the side wall allow fibers which have got stuck laterally to be removed by means of a suction nozzle, which is advantageous compared to cleaning with a suction nozzle below the gripper guideway.
  • the invention also relates to a belt rapier weaving machine in which the entry belts of the rapiers are moved back and forth by means of oscillating belt wheels.
  • the Bring gripper according to the invention is provided for weaving machines in which the weft thread is presented horizontally.
  • the horizontal weft template in contrast to the vertical weft template, which is available with other rapier weaving machines, requires a rapier gripper for which there is a risk of warp threads being torn. This danger does not exist in the case of the inventive grab gripper.
  • FIGS. 5a and 5b show two further variants of the gripper head according to the invention, corresponding to FIGS. 3a and 3b.
  • the gripper head 1 shown in FIG. 1 is shown without being attached to the flexible entry belt with which it is pushed into the shed 30.
  • the base body 2 which essentially has a U-shaped cross-sectional profile, there is the thread clamp 3 on the goods side.
  • the weft thread 4 that is taken from a fixed thread supply (not shown) just enters the thread clamp 3 in FIG .
  • a cutting device is actuated, which is indicated symbolically by the scissors 40.
  • the free cut end which has now become the tip of the weft thread 4, then projects laterally out of the hook head 1 through the trough 11 in the side wall 7.
  • the base body 2 consists of the base 5, which is designed as a sliding surface, and the two side walls 6 and 7.
  • the gripper wall 6 on the reed side has a contour of the upper edge toward the hook tip, which contour with respect to the feed of the weft thread 4 to the thread clamp 3 is suitably shaped: After the rising curve, which lies immediately behind the hook tip, the upper edge sinks into a trough 8. Then, following the trough 8, there is an inclined slope 9 towards the middle of the hook. Using this ascending slope 9, the thread 4 is inserted into the Thread clamp 3 introduced. The rapier head 1 pushed further into the shed then forces the thread 4 into the trough-shaped thread guide 10.
  • the thread guide 10 and the thread clamp 3 can be seen more clearly in FIG. 2a.
  • the base 12 of the terminal 3 the is welded onto the base body 2, for example, the elastic tongue 13 and the rigid clamping jaw 15 are fastened by means of screws.
  • the tongue 13 and the jaw 15 together form a funnel-shaped jaw 16.
  • the jaw 15 is provided with an opening for a cam 14.
  • This squat 14 is fastened on the tongue 13 and serves to open the clamping gap in the retracted state of the gripper, in order to be able to suck off stuck fibers with a suction nozzle, which is then located at the side trough 11.
  • the opening 18 in the bottom 5 next to the thread clamp 3 is provided for thick yarn.
  • the cross-section in FIG. 2b runs through the two lateral troughs 8 and 11.
  • the gripper head base 5 has a sliding surface which is flat in the middle region except for the opening 18 and is convexly curved in the edge regions. If a rounded lower edge is provided at the opening 18, the warp threads are no longer damaged by the sliding surface.
  • the thread 4 runs diagonally from the thread guide 10 to the opening 18 through the free interior of the hook head. This is made possible by the thread deflection fin 17, which together with the clamping jaw 15 form the upper part of the thread clamp 3.
  • the tongue 13 with the cam 14 is not cut and is shown in a frontal view. It can be seen that the tip of the tongue is curved downwards.
  • the variants of the gripper head shown in FIGS. 3a to 5a differ from the exemplary embodiment described above only in the design of the gripper wall on the reed side.
  • the wall piece is behind the trough 8 - in the first embodiment bent outwards into a channel - is now bent towards the center of the hook and provided with an indentation 19 which serves as a thread guide.
  • the weft thread is only partially indicated by its position 4 '.
  • the thread guide 19 is also designed as an indentation.
  • the wall piece projecting towards the center of the hook is here extended to a partial roofing 20 of the space between thread guide 19 and clamp 3.
  • the front edge of this canopy 20 helps with the correct feeding of the weft thread into the jaw 16.
  • the thread guide is again channel-like as in the first embodiment.
  • the outwardly curved wall piece 21 is extended. It is used to displace the upper warp thread sheet upwards and thereby protect it from damage caused by protruding parts of the hook head.
  • a similar roof is available on the reed side of the gripper of the CH-PS 592.761. The elimination of such a roofing in the gripper heads according to the invention described above has the advantage that the gripper requires a little less space and thus makes it possible to reduce the front compartment cross section.

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

Abstract

The weft-carrier gripper for a gripper loom having a horizontal weft feed possesses a head part (1) which is upwardly open. A wide sliding surface (5) protects the warp yarns, and the low centre of gravity reduces the tendency of the head part (1) to lift off from the sliding track when the weft yarn (4) is being drawn into the shed (30). The yarn clamp (3) retaining the weft yarn (4) horizontally has a fin-shaped part (17), by means of which the weft yarn (4) is deflected downwards before it enters the clamp (3). Various alternatives are provided for the yarn guide (10), located on the same side as the reed, of the gripper head (1). <IMAGE>

Description

Die Erfindung betrifft einen Bringergreifer für Greiferwebmaschinen, mit an flexiblem Eintragsband befestigtem Kopfteil, sowie ein Verfahren zum Betrieb des erfindungsgemässen Bringergreifers und eine Bandgreiferwebmaschine mit einem solchen Greifer.The invention relates to a rapier rapier for rapier weaving machines with a head part attached to a flexible entry belt, as well as a method for operating the rapier rapier according to the invention and a ribbon rapier weaving machine with such a rapier.

Bei Greiferwebmaschinen trägt der Bringergreifer den Schussfaden mit seinem Kopfteil, der eine geeignete Fadenführung und eine Fadenklemme aufweist, in den mittleren Bereich des Webfaches ein, wo er durch den Nehmergreifer übernommen wird. Die Aufgaben des Bringergreifers, den vorgelegten Faden sicher zu fassen, nicht zu verlieren und präzise dem Nehmergreifer zuzuführen, machen eine ziemlich robuste und damit massereiche Konstruktion nötig. Bei einer heute verwendeten Ausführung eines Bringergreifers, die aus der CH-PS 592.761 bekannt ist, gleitet der Greifer auf Kufen, die sich an den untern Enden der beiden Seitenwandungen befinden. Diese Kufen üben dabei eine starke Belastung auf die Kettfäden aus, was zu deren Beschädigung führen kann. Die Seitenwandungen des Bringergreiferkopfes werden durch eine brückenartige Oberseite verbunden. Bei dieser Konstruktion liegt der Schwerpunkt weit oben. Da das flexible Band, das den Kopfteil durch das Webfach bewegt, unmittelbar über den Kettfäden läuft, ergibt sich wegen des hoch liegenden Schwerpunktes ein Drehmoment, das eine schwer kontrollierbare Bewegung mit Tendenz des Abhebens des Kopfteils zur Folge hat.In rapier weaving machines, the rapier gripper carries the weft thread with its head part, which has a suitable thread guide and a thread clamp, into the central area of the shed, where it is taken over by the slave gripper. The tasks of the bringer gripper to grasp the thread safely, not to lose it and to feed it precisely to the slave gripper require a fairly robust and therefore massive construction. In a version of a bringer gripper used today, which is known from CH-PS 592.761, the gripper slides on runners which are located at the lower ends of the two side walls. These runners put a heavy load on the warp threads, which can damage them. The side walls of the bringer gripper head are connected by a bridge-like top. The focus of this construction is high. Since the flexible belt, which moves the head section through the shed, runs directly over the warp threads, the high center of gravity results in a torque that is one movement which is difficult to control and tends to lift off the head part.

Der Greifer der CH-PS 592.761 ist noch mit weitern Nachteilen behaftet. Die Spitze des festgehaltenen Schussfadens tritt an der Unterseite des Greifers aus und streift dabei über die Kettfäden. Die Schussfadenspitze kann auch zwischen Kufen und Kettfäden geraten. Dies kann Schäden sowohl an den Kettfäden als auch am Schussfadenende verursachen. Ferner ist ein Nachteil mit der Fadenklemme im Zusammenhang mit deren Reinigung verbunden. In der zurückgezogenen Stellung des Greifers wird die Fadenklemme durch Drücken eines seitlich vorstehenden Lappens geöffnet und durch Absaugen von hängengebliebenen Fasern befreit. Durch das Drücken des Lappens ergibt sich ein Kippmoment, dem mit besonderen Massnahmen entgegengewirkt werden muss. Nachteilig ist auch eine umständliche Anordnung einer Saugdüse unterhalb der Greiferführungsbahn.The gripper of the CH-PS 592.761 still has other disadvantages. The tip of the held weft thread emerges from the underside of the hook and slides over the warp threads. The weft thread tip can also get between runners and warp threads. This can cause damage to both the warp threads and the weft end. There is also a disadvantage associated with the thread clamp in connection with its cleaning. In the retracted position of the hook, the thread clamp is opened by pressing a tab projecting from the side and freed of stuck fibers by suction. Pressing the tab results in a tilting moment that must be counteracted with special measures. Another disadvantage is the complicated arrangement of a suction nozzle below the gripper guideway.

Es ist Aufgabe der Erfindung, einen Bringergreifer zu schaffen, bei dem die aufgeführten Nachteile vermieden sind.It is an object of the invention to provide a bringer gripper in which the disadvantages listed are avoided.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass der Kopfteil des Bringergreifers oben grösstenteils offen ist und eine im wesentlichen teils konvex, teils eben ausgebildete Gleitfäche aufweist, dass der Greifer eine hochliegende Führung für den Schussfaden und eine Fadenklemme hat, wobei Führung und Klemme solcherart angeordnet sind, dass sie den Faden diagonal, mit einem Winkel gegen die Gewebeebene kleiner als 45 Grad, durch den freien Innenraum des Kopfteils gespannt dem Nehmergreifer darbieten. Die Fadenführung ist socherart gestaltet, dass der Faden auch umgelenkt und an der richtigen Stelle der Klemme zugeführt wird.This object is achieved according to the invention in that the head part of the bringer gripper is largely open at the top and has an essentially partly convex, partly flat sliding surface, that the gripper has a high-lying guide for the weft thread and a thread clamp, the guide and clamp being arranged in this way that they present the thread diagonally, at an angle to the tissue plane of less than 45 degrees, through the free interior of the head part to the slave gripper. The thread guide is designed in such a way that the thread is also deflected and fed to the clamp at the correct point.

Der Vorteil der Erfindung ist darin zu sehen, dass der Schwerpunkt des Greiferkopfes tief liegt und dass dadurch eine weniger zum Abheben neigende Bewegung des Greifers möglich wird. Dank der breiten Gleitfläche des Greiferkopfes, die eben oder konvex ausgebildet ist, werden die Kettfäden geschont. Überdies erlaubt der oben offene Greiferkopf guten Einblick zu Kontrollzwecken sowie gute Zugänglichkeit, insbesondere zur Fadenklemme, was hinsichtlich Reinigungs- und Reparaturmöglichkeiten vorteilhaft ist.The advantage of the invention can be seen in the fact that the center of gravity of the gripper head is low and that this enables a movement of the gripper that is less prone to lifting off. Thanks to the wide sliding surface of the hook head, which is flat or convex, the warp threads are protected. In addition, the open top gripper head allows good insight for control purposes and good accessibility, especially to the thread clamp, which is advantageous in terms of cleaning and repair options.

Durch die abhängigen Ansprüche 2 bis 9 ergeben sich weitere vorteilhafte Merkmale des erfindungsgemässen Bringergreifers.The dependent claims 2 to 9 result in further advantageous features of the carrier gripper according to the invention.

Der erfindungsgemässe Bringergreiferkopf weist einen einteiligen Grundkörper auf, der kostengünstig aus Blech gefertigt werden kann. Die Fadenklemme wird auf diesem Grundkörper befestigt. Die Fadenführung, die am obern Rand der rietseitigen Greiferwandung angeordnet ist, lässt sich beispielsweise einfach durch Biegen des Blechs, aus dem der Grundkörper besteht, herstellen. Die Fadenführung lässt sich auch mittels einer aus der Greiferwandung ausgebrochenen Einbuchtung herstellen.The bringer gripper head according to the invention has a one-piece base body which can be manufactured inexpensively from sheet metal. The thread clamp is attached to this body. The thread guide, which is arranged on the upper edge of the reed-side gripper wall, can be produced, for example, simply by bending the sheet metal from which the base body is made. The thread guide can also be produced by means of an indentation broken out of the hook wall.

Der Grundkörper des erfindungsgemässen Bringergreiferkopfs ist scheidenförmig geformt, so dass der Nehmergreifer in dessen Innenraum eindringen und dort den dargebotenen Schussfaden übernehmen kann. Die Fadenklemme ist im Innenraum so angeordnet, dass noch freier Spielraum für den Nehmergreifer offen bleibt. Sie befindet sich unmittelbar neben der warenseitigen Greiferwandung. Mit einer starren, an der Klemme angebrachten, flossenförmigen Lamelle wird der von der hochliegenden Fadenführung kommende Schussfaden gegen den Boden des Greiferkopfes umgelenkt, bevor der Faden danach wieder nach oben zur Klemmstelle geführt wird. Durch die Fadenumlenkflosse der Klemme ergibt sich eine Fadenführung im Greiferkopf, die diagonal durch den für den Nehmergreifer freien Innenraum verläuft.The base body of the bringer gripper head according to the invention is shaped like a sheath, so that the slave gripper can penetrate into its interior and take over the weft thread presented there. The thread clamp is arranged in the interior so that there is still free space for the slave gripper. it is located immediately next to the gripper wall on the goods side. With a rigid, fin-shaped lamella attached to the clamp, the weft thread coming from the high-lying thread guide is deflected against the bottom of the hook head before the thread is then guided upwards again to the clamping point. The thread deflection fin of the clamp results in a thread guide in the hook head, which runs diagonally through the interior space which is free for the slave hook.

Es kann vorteilhaft sein, unter der Fadenumlenkflosse einen Durchbruch im Greiferboden vorzusehen. Dann kann auch dickeres Garn, ohne durch den Greiferboden behindert zu sein, um die Fadenumlenkflosse herumgeführt werden.It can be advantageous to provide an opening in the looper bottom under the thread deflection fin. Thicker yarn can then also be guided around the thread deflection fin without being hindered by the looper bottom.

Die Fadenklemme, die bis auf die Fadenumlenkflosse im wesentlichen schon bekannt ist (DE-PS 29.47.399), hält den Schussfaden mit seiner Klemmstelle in horizontaler Richtung. Dank diesem Sachverhalt ragt das Fadenende durch eine Mulde in der Seitenwand aus dem Greifer hinaus und kommt daher nicht mit den Kettfäden in Berührung, was eine gegenseitige Beeinträchtigung von Schussfaden und Kettfäden ausschliesst.The thread clamp, which is essentially already known except for the thread deflection fin (DE-PS 29.47.399), holds the weft thread with its clamping point in the horizontal direction. Thanks to this, the thread end protrudes from the hook through a trough in the side wall and therefore does not come into contact with the warp threads, which rules out mutual interference between the weft thread and the warp thread.

Die im erfindungsgemässen Bringergreifer vorgesehene Klemmstelle und die zugeordnete Mulde in der Seitenwand erlaubt, seitlich mittels einer Saugdüse hängengebliebene Fasern zu entfernen, was gegenüber einer Reinigung mit Saugdüse unterhalb der Greiferführungsbahn von Vorteil ist.The clamping point provided in the bringer gripper according to the invention and the associated trough in the side wall allow fibers which have got stuck laterally to be removed by means of a suction nozzle, which is advantageous compared to cleaning with a suction nozzle below the gripper guideway.

Die Erfindung bezieht sich auch auf eine Bandgreiferwebmaschine, bei der die Eintragsbänder der Greifer mittels oszillierender Bandräder hin- und herbewegt werden. Der erfindungsgemässe Bringergreifer ist für Webmaschinen vorgesehen, bei denen der Schussfaden horizontal vorgelegt wird. Die Horizontal-Schussvorlage im Gegensatz zur Vertikal-Schussvorlage, die bei andern Greiferwebmaschinen vorliegt, macht einen Bringergreifer erforderlich, für den die Gefahr besteht, dass Kettfäden zerrissen werden. Beim erfindungsgemässen Bringergreifer besteht diese Gefahr nicht.The invention also relates to a belt rapier weaving machine in which the entry belts of the rapiers are moved back and forth by means of oscillating belt wheels. The Bring gripper according to the invention is provided for weaving machines in which the weft thread is presented horizontally. The horizontal weft template, in contrast to the vertical weft template, which is available with other rapier weaving machines, requires a rapier gripper for which there is a risk of warp threads being torn. This danger does not exist in the case of the inventive grab gripper.

Im folgenden wird die Erfindung anhand der Figuren näher erläutert. Es zeigen:

Fig.1
den Kopfteil eines erfindungsgemässen Bringergreifers, dem beim Eintritt ins Webfach der Schussfaden horizontal vorgelegt wird,
Fig.2a
den gleichen Greiferkopf wie in Fig.1 von der Rietseite her gesehen,
Fig.2b
einen Querschnitt durch den Greiferkopf nach Linie II - II in Fig.2a,
Fig.3a
eine erste Variante des erfindungsgemässen Greiferkopfes und
Fig.3b
einen der Fig.2b entsprechenden Querschnitt zur ersten Variante.
The invention is explained in more detail below with reference to the figures. Show it:
Fig. 1
the head part of a bringer gripper according to the invention, to which the weft thread is presented horizontally when entering the shed,
Fig.2a
the same gripper head as seen in Fig. 1 from the reed side,
Fig.2b
a cross section through the gripper head along line II - II in Fig.2a,
Fig.3a
a first variant of the gripper head according to the invention and
Fig.3b
a cross section corresponding to Fig.2b to the first variant.

Die Fig.4a und 4b sowie die Fig.5a und 5b zeigen entsprechend den Fig.3a und 3b zwei weitere Varianten des erfindungsgemässen Greiferkopfes.4a and 4b and FIGS. 5a and 5b show two further variants of the gripper head according to the invention, corresponding to FIGS. 3a and 3b.

Der in Fig.1 gezeigte Greiferkopf 1 ist ohne die Befestigung am flexiblen Eintragsband, mit dem er ins Webfach 30 gestossen wird, dargestellt. Im Innenraum des Grundkörpers 2, der im wesentlichen ein u-förmiges Querschnittsprofil hat, befindet sich warenseitig die Fadenklemme 3. Der vorgelegte Schussfaden 4, der von einem nicht gezeigten, ortsfesten Fadenvorrat entnommen wird, tritt in Fig.1 gerade in die Fadenklemme 3 ein. Zu einem etwas spätern Zeitpunkt, wenn der Greifer sich etwas tiefer im Webfach befindet und der Faden 4 durch die Klemme 3 sicher gehalten wird, wird eine Schneidvorrichtung betätigt, die durch die Schere 40 symbolisch angedeutet ist. Das freie Schnittende, das nun zur Spitze des Schussfadens 4 geworden ist, ragt danach durch die Mulde 11 in der Seitenwand 7 seitlich aus dem Greiferkopf 1 heraus.The gripper head 1 shown in FIG. 1 is shown without being attached to the flexible entry belt with which it is pushed into the shed 30. In the interior of the base body 2, which essentially has a U-shaped cross-sectional profile, there is the thread clamp 3 on the goods side. The weft thread 4 that is taken from a fixed thread supply (not shown) just enters the thread clamp 3 in FIG . At a somewhat later point in time, when the gripper is somewhat lower in the shed and the thread 4 is held securely by the clamp 3, a cutting device is actuated, which is indicated symbolically by the scissors 40. The free cut end, which has now become the tip of the weft thread 4, then projects laterally out of the hook head 1 through the trough 11 in the side wall 7.

Der Grundkörper 2 besteht aus dem Boden 5, der als Gleitfläche ausgebildet ist, und den beiden Seitenwandungen 6 und 7. Die rietseitige Greiferwandung 6 weist gegen die Greiferspitze hin eine Kontur der obern Kante auf, die hinsichtlich der Zuleitung des vorgelegten Schussfadens 4 zur Fadenklemme 3 geeignet geformt ist: Nach der Steigkurve, die unmittelbar hinter der Greiferspitze liegt, senkt sich die obere Kante in eine Mulde 8. Anschliessend an die Mulde 8 folgt eine gegen die Greifermitte hin gebogene Steigschräge 9. Mittels dieser Steigschräge 9 wird der Faden 4 in die Fadenklemme 3 eingeführt. Der weiter ins Webfach gestossene Greiferkopf 1 zwingt darauf den Faden 4 in die rinnenförmige Fadenführung 10.The base body 2 consists of the base 5, which is designed as a sliding surface, and the two side walls 6 and 7. The gripper wall 6 on the reed side has a contour of the upper edge toward the hook tip, which contour with respect to the feed of the weft thread 4 to the thread clamp 3 is suitably shaped: After the rising curve, which lies immediately behind the hook tip, the upper edge sinks into a trough 8. Then, following the trough 8, there is an inclined slope 9 towards the middle of the hook. Using this ascending slope 9, the thread 4 is inserted into the Thread clamp 3 introduced. The rapier head 1 pushed further into the shed then forces the thread 4 into the trough-shaped thread guide 10.

In Fig.2a erkennt man die Fadenführung 10 und die Fadenklemme 3 deutlicher. Auf den Sockel 12 der Klemme 3, der beispielsweise auf den Grundkörper 2 aufgeschweisst ist, sind die elastische Zunge 13 und die starre Klemmenbacke 15 mittels Schrauben befestigt. Am vordern Ende bilden Zunge 13 und Klemmbacke 15 zusammen ein trichterartig geformtes Klemmenmaul 16. Die Klemmbacke 15 ist mit einer Öffnung für einen Nocken 14 versehen. Dieser Hocken 14 ist auf der Zunge 13 befestigt und dient dazu, im zurückgezogenen Zustand des Greifers den Klemmspalt zu öffnen, um so hängengebliebene Fasern mit einer Saugdüse, die sich dann bei der seitlichen Mulde 11 befindet, absaugen zu können. Der Durchbruch 18 im Boden 5 neben der Fadenklemme 3 ist für dickes Garn vorgesehen.The thread guide 10 and the thread clamp 3 can be seen more clearly in FIG. 2a. On the base 12 of the terminal 3, the is welded onto the base body 2, for example, the elastic tongue 13 and the rigid clamping jaw 15 are fastened by means of screws. At the front end, the tongue 13 and the jaw 15 together form a funnel-shaped jaw 16. The jaw 15 is provided with an opening for a cam 14. This squat 14 is fastened on the tongue 13 and serves to open the clamping gap in the retracted state of the gripper, in order to be able to suck off stuck fibers with a suction nozzle, which is then located at the side trough 11. The opening 18 in the bottom 5 next to the thread clamp 3 is provided for thick yarn.

Der Querschnitt in Fig.2b verläuft durch die beiden seitlichen Mulden 8 und 11. Wie man sieht, weist der Greiferkopfboden 5 eine Gleitfläche auf, die im mittleren Bereich bis auf Ausnahme des Durchbruchs 18 eben und in den Randbereichen konvex gekrümmt ist. Wird beim Durchbruch 18 für eine abgerundete untere Kante gesorgt, so treten Beschädigungen der Kettfäden durch die Gleitfläche nicht mehr auf. Der Faden 4 verläuft von der Fadenführung 10 zum Durchbruch 18 diagonal durch den freien Innenraum des Greiferkopfes. Dies wird durch die Fadenumlenkflosse 17 ermöglicht, die zusammen mit der Klemmbacke 15 den Oberteil der Fadenklemme 3 bilden. Die Zunge 13 mit dem Nocken 14 ist nicht geschnitten und in frontaler Ansicht dargestellt. Man erkennt, dass die Zungenspitze nach unten gekrümmt ist.The cross-section in FIG. 2b runs through the two lateral troughs 8 and 11. As can be seen, the gripper head base 5 has a sliding surface which is flat in the middle region except for the opening 18 and is convexly curved in the edge regions. If a rounded lower edge is provided at the opening 18, the warp threads are no longer damaged by the sliding surface. The thread 4 runs diagonally from the thread guide 10 to the opening 18 through the free interior of the hook head. This is made possible by the thread deflection fin 17, which together with the clamping jaw 15 form the upper part of the thread clamp 3. The tongue 13 with the cam 14 is not cut and is shown in a frontal view. It can be seen that the tip of the tongue is curved downwards.

Die in den Fig.3a bis Fig.5a dargestellten Varianten des Greiferkopfes unterscheiden sich vom oben beschriebenen Ausführungsbeispiel lediglich in der Ausgestaltung der rietseitigen Greiferwandung. So ist bei der ersten Variante in Fig.3a und Fig.3b das Wandungsstück hinter der Mulde 8 - beim ersten Ausführungsbeispiel zu einer Rinne nach aussen gebogenen - nun gegen die Greifermitte gebogen und mit einer Einbuchtung 19 versehen, die als Fadenführung dient. Im dargestellten Querschnitt ist der Schussfaden nur teilweise durch seine Lage 4' angedeutet.The variants of the gripper head shown in FIGS. 3a to 5a differ from the exemplary embodiment described above only in the design of the gripper wall on the reed side. In the first variant in FIGS. 3a and 3b, the wall piece is behind the trough 8 - in the first embodiment bent outwards into a channel - is now bent towards the center of the hook and provided with an indentation 19 which serves as a thread guide. In the cross section shown, the weft thread is only partially indicated by its position 4 '.

Bei der Variante in Fig.4a ist die Fadenführung 19 auch als Einbuchtung ausgeführt. Das zur Greifermitte ragende Wandungsstück ist hier aber zu einer teilweisen Überdachung 20 des Raumes zwischen Fadenführung 19 und Klemme 3 verlängert. Die vordere Kante dieser Üeberdachung 20 hilft bei der richtigen Zuführung des vorgelegten Schussfadens in das Klemmenmaul 16.In the variant in FIG. 4 a, the thread guide 19 is also designed as an indentation. The wall piece projecting towards the center of the hook is here extended to a partial roofing 20 of the space between thread guide 19 and clamp 3. The front edge of this canopy 20 helps with the correct feeding of the weft thread into the jaw 16.

Bei der letzten Variante in Fig.5a ist die Fadenführung wieder rinnenförmig wie schon beim ersten Ausführungsbeispiel. Hier ist aber das nach aussen gebogene Wandstück 21 verlängert. Es dient dazu, die obere Kettfadenschar nach oben zu verdrängen und sie dadurch vor Beschädigungen durch hervorstehende Teile des Greiferkopfes zu schützen. Beim Greifer der CH-PS 592.761 ist eine ähnliche Überdachung auf der Rietseite vorhanden. Das Entfallen einer solchen Überdachung bei den oben beschriebenen erfindungsgemässen Greiferköpfen hat den Vorteil, dass der Greifer etwas weniger Platz benötigt und somit eine Reduktion des Vorderfachquerschnitts möglich macht.In the last variant in FIG. 5 a, the thread guide is again channel-like as in the first embodiment. Here, however, the outwardly curved wall piece 21 is extended. It is used to displace the upper warp thread sheet upwards and thereby protect it from damage caused by protruding parts of the hook head. A similar roof is available on the reed side of the gripper of the CH-PS 592.761. The elimination of such a roofing in the gripper heads according to the invention described above has the advantage that the gripper requires a little less space and thus makes it possible to reduce the front compartment cross section.

Claims (11)

Bringergreifer für Greiferwebmaschine, mit an flexiblem Eintragsband befestigtem Kopfteil (1), der oben grösstenteils offen ist und der im wesentlichen eine teils konvex, teils eben ausgebildete Gleitfäche (5) aufweist, mit hochliegender Führung (10) für den Schussfaden und mit Fadenklemme (30), wobei Führung (10) und Klemme (3) solcherart angeordnet sind, dass sie den Faden (4) diagonal, mit einem Winkel gegen die Gewebeebene kleiner als 45 Grad, durch den freien Innenraum des Kopfteils (1) gespannt dem Nehmergreifer darbieten.Bring gripper for rapier weaving machine, with a head part (1) attached to a flexible entry belt, which is largely open at the top and which essentially has a partly convex, partly flat sliding surface (5), with a high-lying guide (10) for the weft thread and with a thread clamp (30 ), the guide (10) and clamp (3) being arranged in such a way that they present the thread (4) diagonally, at an angle to the tissue plane of less than 45 degrees, through the free interior of the head part (1) stretched to the slave gripper. Bringergreifer nach Anspruch 1, dadurch gekennzeichnet, dass der Kopfteil (1) einen aus einem Blechstück gefertigten einteiligen Grundkörper (2) aufweist, auf dem die Fadenklemme (3) befestigt ist.Bring gripper according to claim 1, characterized in that the head part (1) has a one-piece base body (2) made of a sheet metal piece, on which the thread clamp (3) is fastened. Bringergreifer nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Kopfteil (1) eine rinnenförmige, durch Biegen eines Blechs erzeugte Fadenführung (10) aufweist.Bring gripper according to one of claims 1 or 2, characterized in that the head part (1) has a groove-shaped thread guide (10) produced by bending a sheet. Bringergreifer nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Kopfteil (1) eine aus der Greiferwandung (6) ausgebrochene Einbuchtung (19) als Fadenführung aufweist.Bring gripper according to one of claims 1 or 2, characterized in that the head part (1) has an indentation (19) broken out of the gripper wall (6) as a thread guide. Bringergreifer nach einem der Ansprüche 1, 2 oder 4, dadurch gekennzeichnet, dass eine teilweise Überdachung (20) des Raumes zwischen Fadenführung (10) und Klemme (3) vorliegt.Bring gripper according to one of claims 1, 2 or 4, characterized in that a partial Roofing (20) of the space between thread guide (10) and clamp (3) is present. Bringergreifer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass eine teilweise Überdachung (21) der rietseitigen Wandung des Kopfteils vorliegt.Bringer gripper according to one of claims 1 to 4, characterized in that there is a partial roofing (21) of the reed-side wall of the head part. Bringergreifer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Fadenklemme (3) eine Fadenumlenkflosse (17) aufweist, die den Faden zwischen Führung (10) und Klemmstelle niederhält.Bring gripper according to one of claims 1 to 6, characterized in that the thread clamp (3) has a thread deflection fin (17) which holds the thread down between the guide (10) and the clamping point. Bringergreifer nach Anspruch 7, dadurch gekennzeichnet, dass die Gleitfläche (5) einen Durchbruch (18) unterhalb der Fadenumlenkflosse (17) aufweist.Bring gripper according to claim 7, characterized in that the sliding surface (5) has an opening (18) below the thread deflection fin (17). Bringergreifer nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Klemme (3) den Faden (4) an seinem Ende mindestens annähernd horizontal festhält.Bring gripper according to one of claims 1 to 8, characterized in that the clamp (3) holds the thread (4) at least approximately horizontally at its end. Verfahren zum Betrieb des Bringergreifers nach Anspruch 9, dadurch gekennzeichnet, dass die Fadenklemme (3) ausserhalb des Webfachs geöffnet wird und seitlich bei der Klemme (3) mittels einer Saugdüse hängengebliebene Fasern abgesaugt werden.A method of operating the bringer gripper according to claim 9, characterized in that the thread clamp (3) is opened outside the shed and fibers stuck to the side of the clamp (3) are sucked off by means of a suction nozzle. Bandgreiferwebmaschine mit Horizontal-Schussvorlage und mit einem Bringergreifer nach einem der Ansprüche 1 bis 9.Belt rapier weaving machine with horizontal weft and with a rapier according to one of claims 1 to 9.
EP90810955A 1990-02-05 1990-12-06 Weft carrying gripper for gripper looms Expired - Lifetime EP0441099B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH35390 1990-02-05
CH353/90 1990-02-05

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EP0441099B1 EP0441099B1 (en) 1996-01-31

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US (1) US5129431A (en)
EP (1) EP0441099B1 (en)
JP (1) JPH04214439A (en)
DE (1) DE59010104D1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0657569A1 (en) * 1993-10-27 1995-06-14 Interpatent Limited Carrying gripper for looms
EP0811712A1 (en) * 1996-06-07 1997-12-10 Sulzer Rüti Ag Thread clamp for a feeding gripper and feeding gripper with such a clamp
EP0812938A1 (en) * 1996-06-14 1997-12-17 Sulzer Rüti Ag Support for a thread clamp and feeding gripper for gripper loom with such support
WO1997047792A1 (en) * 1996-06-07 1997-12-18 Picanol N.V. Transfer gripper for a rapier loom
BE1010334A3 (en) * 1996-06-07 1998-06-02 Picanol Nv Device for insertion of a weft thread in a gripper loom
EP0893524A1 (en) * 1997-07-11 1999-01-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Weft inserting apparatus for rapier loom
WO1999029944A1 (en) * 1997-12-11 1999-06-17 Picanol N.V. Gripper for a mechanical loom
EP1806443A1 (en) * 2006-01-06 2007-07-11 Sultex AG Feeding gripper for a shuttleless weaving loom
WO2010142264A1 (en) 2009-06-10 2010-12-16 Lindauer Dornier Gesellschaft Mbh Device and method for introducing the weft into a gripper weaving machine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1255629B (en) * 1992-05-22 1995-11-09 Luciano Corain TRACTION GRIPPER PERFECTED FOR TEXTILE FRAME
IT1274589B (en) * 1994-08-05 1997-07-18 Nuovo Pignone Spa IMPROVED SYSTEM OF GRIPPING AND TIGHTENING THE WEFT IN THE TRACTION GRIPPER OF A TEXTILE FRAME
DE10018939A1 (en) * 2000-04-17 2001-10-18 Picanol Nv Gripper housing at a gripper loom, to carry the weft into the shed to be picked up by a second gripper, comprises metal plate(s) with bent edges, which form weft yarn guides in a structure with reduced weight
CN105088495A (en) * 2015-09-22 2015-11-25 重庆群禾纺织有限公司 Weft-feeding rapier driving mechanism for rapier weaving machine

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FR2113237A5 (en) * 1970-10-27 1972-06-23 Fischer Ag Brugg Georg Suction cleaner for weft insertion unit - on shuttleless looms
FR2222467A1 (en) * 1973-03-22 1974-10-18 Rockwell International Corp
FR2447988A1 (en) * 1979-02-05 1980-08-29 Saurer Ag Adolph DEVICE FOR TRANSFERRING THE END OF THE WEFT YARN ON A WEAVING MACHINE WITHOUT A SHUTTLE
GB2058853A (en) * 1979-07-10 1981-04-15 Toyoda Automatic Loom Works Weft inserting device for shuttleless loom
GB2083844A (en) * 1980-09-15 1982-03-31 Nuovo Pignone Spa Weft transfer devices in shuttleless looms
FR2635538A1 (en) * 1988-08-19 1990-02-23 Nuovopignone Ind Mecca WEFT INSERTION LANCE FOR NON-SHUTTLE WEAVING

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0657569A1 (en) * 1993-10-27 1995-06-14 Interpatent Limited Carrying gripper for looms
EP0811712A1 (en) * 1996-06-07 1997-12-10 Sulzer Rüti Ag Thread clamp for a feeding gripper and feeding gripper with such a clamp
WO1997047792A1 (en) * 1996-06-07 1997-12-18 Picanol N.V. Transfer gripper for a rapier loom
BE1010334A3 (en) * 1996-06-07 1998-06-02 Picanol Nv Device for insertion of a weft thread in a gripper loom
EP0812938A1 (en) * 1996-06-14 1997-12-17 Sulzer Rüti Ag Support for a thread clamp and feeding gripper for gripper loom with such support
US5899242A (en) * 1996-06-14 1999-05-04 Sulzer Rueti Ag Thread clamp carrier body for a bringer gripper
EP0893524A1 (en) * 1997-07-11 1999-01-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Weft inserting apparatus for rapier loom
WO1999029944A1 (en) * 1997-12-11 1999-06-17 Picanol N.V. Gripper for a mechanical loom
EP1806443A1 (en) * 2006-01-06 2007-07-11 Sultex AG Feeding gripper for a shuttleless weaving loom
WO2010142264A1 (en) 2009-06-10 2010-12-16 Lindauer Dornier Gesellschaft Mbh Device and method for introducing the weft into a gripper weaving machine

Also Published As

Publication number Publication date
JPH04214439A (en) 1992-08-05
EP0441099B1 (en) 1996-01-31
US5129431A (en) 1992-07-14
DE59010104D1 (en) 1996-03-14

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