EP2063008A1 - Gripper device for inserting the weft thread of a rapier weaving machine - Google Patents
Gripper device for inserting the weft thread of a rapier weaving machine Download PDFInfo
- Publication number
- EP2063008A1 EP2063008A1 EP07022657A EP07022657A EP2063008A1 EP 2063008 A1 EP2063008 A1 EP 2063008A1 EP 07022657 A EP07022657 A EP 07022657A EP 07022657 A EP07022657 A EP 07022657A EP 2063008 A1 EP2063008 A1 EP 2063008A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gripper
- weft thread
- clamping
- weft
- thread
- 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.)
- Withdrawn
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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
Definitions
- the invention relates to a gripper device for the weft insertion of a rapier loom according to the preamble of claim 1.
- rapier looms of the weft thread is usually introduced by a Bringgreifer from one side into the shed and then - usually in about the middle of the shed - passed a Holgreifer, which then pulls the weft from the shed.
- a gripper device is formed in both grippers. The grippers move along along guide elements which are attached to the reed.
- a gripper device comprises two positive clamping jaws, which are arranged on a gripper body. In this case, then the weft thread between the jaws is clamped feasible.
- the gripper device can be opened, whereby the weft thread is released. The opening is usually done by a movement of a jaw, so that the weft thread then rests freely on the lower jaw.
- a first approach to solving this problem is from the EP-A-0 940 490 known in which it is proposed, the thread clamp with each other form lying elevations and depressions extending transversely to the Einlegevichtung of festzuhaltenden of the thread clamp thread.
- the elevations which are optionally deformable, have edges for retaining the thread.
- This based on the sawtooth thread clamp is very complicated and calls for a kink and notch effect for holding the thread. The latter leads to damage to the threads to be held.
- such thread clamps are not universally applicable but must be tailored to the thread quality and thread thickness individually.
- CH-A-556 930 It is known to form a gripper with a movable clamping part and a fixed abutment, wherein on the abutment a soft elastic pad is provided with a floating mounted thereon, wear-resistant support member.
- the in the CH-A-556 930 proposed embodiment is characterized in that the support member held by its shape and the elasticity of the soft elastic pad (clamped) and thereby replacement or removal of the support member is made possible.
- additional elements - such as spacers, a projection and holes - must be provided.
- the floating storage involves the risk that, especially at high speeds of loom, the floating support dissolves and leads to disturbances of operation and damage to the weft.
- the object of the invention is to improve a gripper device for the weft insertion of a rapier of the type described above, without the disadvantages of CH-A-556 930 or the EP-A-0 940 490 to have to accept. Damage to the weft thread by the clamping operation and weft insertion with the clamped weft yarn are to be avoided, especially with fine weft thread material.
- the object is achieved by a gripper device according to claim 1.
- the measures of the invention initially have the consequence that the weft can be picked up and transported gently, since a hard terminals is avoided.
- the elastic intermediate member dampens the harmful transmission of machine vibrations on the yarn to be transported.
- the production of the gripper is simple and can be carried out precisely and ensures safe, trouble-free and low-wear operation even at high speeds of the weaving machine.
- both jaws of the gripper have a glued intermediate layer of elastic material (claim 4).
- the jaws may have flat clamping surfaces or toothed clamping surfaces. (Claim 5 and 6)
- FIG. 1 is of the designated as 2 rapier head of a Bringgreifer, which is to cooperate with a similar trained Holgreifer, has a gripper body 8, on which the lower jaw 10 and the upper jaw 16 is arranged.
- the upper jaw 16 can be opened by a conventional mechanism having a torsion spring with respect to the lower jaw in order to receive or deliver a weft yarn can. When closing the weft thread is clamped and can be transported in the closed state of the gripper.
- the upper jaw 16 forms with the lower jaw 10 in the closed state of the gripper a wave-shaped form-fitting to clamp the weft firmly.
- Jaw 16 especially even with a very slight tilting of the upper jaw 16 against the lower jaw 10 - or on the other hand at a very high shot frequency of the rapier weaving machine with the corresponding hard closing movements is too heavily loaded, which may in particular lead to fibril fractures are present embodiment, both the upper jaw 16 as well as the lower jaw 10 with parallel glued or vulcanized rubber inserts 12 and 14 arranged on the gripper body. The thickness and hardness of the bonded rubber inserts the intended closing speed and the closing force of the positive connection between the jaws 16 and 10 are adjusted.
- the positive connection is not provided over the entire gripper width, but only at the edge.
- a gap 18 is formed between the jaws 10 and 16 in this embodiment.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
Description
Die Erfindung betrifft eine Greifereinrichtung für den Schussfadeneintrag einer Greiferwebmaschine gemäss dem Oberbegriff von Anspruch 1.The invention relates to a gripper device for the weft insertion of a rapier loom according to the preamble of claim 1.
Bei Greiferwebmaschinen wird der Schussfaden üblicherweise von einem Bringgreifer von einer Seite in das Webfach eingebracht und dann - üblicherweise in etwa in der Mitte des Webfaches - einem Holgreifer übergeben, der den Schussfaden sodann aus dem Webfach herauszieht. Dabei ist in beiden Greifern eine Greifereinrichtung ausgebildet. Die Greifer bewegen sich dabei längs von Führungselementen, die am Webblatt befestigt sind.In rapier looms of the weft thread is usually introduced by a Bringgreifer from one side into the shed and then - usually in about the middle of the shed - passed a Holgreifer, which then pulls the weft from the shed. In this case, a gripper device is formed in both grippers. The grippers move along along guide elements which are attached to the reed.
Aus dem Stand der Technik bekannt ist, dass eine Greifereinrichtung zwei formschlüssige Klemmbacken umfasst, die an einem Greiferkörper angeordnet sind. Dabei ist dann der Schussfaden zwischen den Klemmbacken geklemmt führbar. Bei der Aufnahme des Schussfadens durch den Bringgreifer, bei der Übergabe des Schussfadens vom Bringgreifer an den Holgreifer und bei der Freigabe des Schussfadens aus dem Holgreifer kann die Greifereinrichtung geöffnet werden, wodurch der Schussfaden freigegeben wird. Das Öffnen geschieht üblicherweise durch eine Bewegung einer Klemmbacke, so dass der Schussfaden dann frei auf der unteren Klemmbacke aufliegt.It is known from the prior art that a gripper device comprises two positive clamping jaws, which are arranged on a gripper body. In this case, then the weft thread between the jaws is clamped feasible. When receiving the weft thread by the Bringgreifer, in the transfer of the weft thread from the Bringgreifer to the Holgreifer and the release of the weft thread from the Holgreifer the gripper device can be opened, whereby the weft thread is released. The opening is usually done by a movement of a jaw, so that the weft thread then rests freely on the lower jaw.
Beim Betrieb einer solchen Greifereinrichtung hat sich herausgestellt, dass - insbesondere bei feinen Schussfäden - Fibrillenbrüche oder - -beschädigungen auftreten. Die beiden, grundsätzlich formschlüssigen Klemmbacken können sich nämlich - insbesondere bei einem Webbetrieb mit hoher Einschussfrequenz, leicht etwas verkantet zueinander schliessen und dabei beim Einklemmen des Schussfadens diesen beschädigen.In the operation of such a gripper device has been found that - especially with fine weft threads - fibril breaks or - damage occurs. The two, in principle form-fitting jaws can namely - especially in a weaving operation with high bullet frequency, slightly tilted slightly close to each other and thereby damage the trapping of the weft thread.
Ein erster Ansatz zur Lösung dieses Problems ist aus der
Aus der
Aufgabe der Erfindung ist es, eine Greifereinrichtung für den Schussfadeneintrag einer Greiferwebmaschine der eingangs beschriebenen Art zu verbessern, ohne die Nachteile der
Die Aufgabe wird durch eine Greifereinrichtung nach Anspruch 1 gelöst. Dabei haben die Massnahmen der Erfindung zunächst einmal zur Folge, dass der Schussfaden sanft aufgenommen und transportiert werden kann, da ein hartes Klemmen vermieden wird. Ausserdem dämpft das elastische Zwischenglied die schädliche Übertragung von Maschinenschwingungen auf den zu transportierenden Faden. Zudem ist die Herstellung des Greifers einfach und kann präzise durchgeführt werden und sichert auch bei hohen Drehzahlen der Webmaschine einen sicheren, störungs- und verschleissarmen Betrieb.The object is achieved by a gripper device according to claim 1. The measures of the invention initially have the consequence that the weft can be picked up and transported gently, since a hard terminals is avoided. In addition, the elastic intermediate member dampens the harmful transmission of machine vibrations on the yarn to be transported. In addition, the production of the gripper is simple and can be carried out precisely and ensures safe, trouble-free and low-wear operation even at high speeds of the weaving machine.
Dabei kommt als elastisches Material insbesondere Gummi, Silikon oder ein gummiähnliches Kunststoffmaterial in Frage (Anspruch 2).In this case comes as an elastic material in particular rubber, silicone or a rubber-like plastic material in question (claim 2).
Vorteilhaft ist es, wenn die beiden Oberflächen der elastischen Schicht, sowie die Gegenflächen des Trägers und der Klemmbacke in etwa parallel zueinander angeordnet sind (Anspruch 3).It is advantageous if the two surfaces of the elastic layer, as well as the mating surfaces of the carrier and the jaw are arranged approximately parallel to each other (claim 3).
Vorteilhaft ist es wenn, beide Klemmbacken des Greifers eine eingeklebte Zwischenlage aus elastischem Material aufweisen (Anspruch 4). Die die Klemmbacken können ebene Klemmflächen oder verzahnte Klemmflächen aufweisen. (Anspruch 5 und 6)It is advantageous if both jaws of the gripper have a glued intermediate layer of elastic material (claim 4). The jaws may have flat clamping surfaces or toothed clamping surfaces. (Claim 5 and 6)
Die vorbenannten sowie die beanspruchten und in den nachfolgenden Ausführungsbeispielen beschriebenen, erfindungsgemäss zu verwendenden Elemente unterliegen in ihrer Grösse, Formgestaltung, Materialverwendung und ihrer technischen Konzeption keinen besonderen Ausnahmebedingungen, so dass die in dem jeweiligen Anwendungsgebiet bekannten Auswahlkriterien uneingeschränkt Anwendung finden können.The above-mentioned as well as the claimed and described in the following embodiments, according to the invention to be used elements are subject to their size, shape design, material usage and their technical conception no special conditions of exception, so that the well-known in the respective field of application selection criteria can apply without restriction.
Ausführungsbeispiele der Erfindung werden anhand schematischer Zeichnungen nachfolgend näher beschrieben, dabei zeigen:
- Figur 1
- eine schematische Darstellung eines Greiferkörpers mit zwei gummigefederten Klemmbacken, gemäss einem ersten Ausführungsbeispiel der Erfindung;
- Figur 2
- eine Schnittdarstellung von
Figur 1 ; - Figur 3
- eine Schnittdarstellung gemäss einer alternativen Ausführung zu
Figur 1 .
- FIG. 1
- a schematic representation of a gripper body with two rubber spring jaws, according to a first embodiment of the invention;
- FIG. 2
- a sectional view of
FIG. 1 ; - FIG. 3
- a sectional view according to an alternative embodiment to
FIG. 1 ,
In
Die obere Klemmbacke 16 bildet mit der unteren Klemmbacke 10 im geschlossenen Zustand des Greifers einen wellenförmigen Formschluss aus, um den Schussfaden fest zu klemmen. Um nun zu vermeiden, dass der Schussfaden einerseits durch die scheren- oder zangenartige Schliessbewegung der oberen. Klemmbacke 16 - insbesondere auch schon bei einer sehr leichten Verkantung der oberen Klemmbacke 16 gegen die untere Klemmbacke 10 - oder aber andererseits bei einer sehr hohen Einschussfrequenz der Greiferwebmaschine mit den entsprechenden harten Schliessbewegungen allzu stark belastet wird, was insbesondere zu Fibrillenbrüchen führen kann, sind im vorliegenden Ausführungsbeispiel sowohl die obere Klemmbacke 16 wie auch die untere Klemmbacke 10 mit parallel eingeklebten oder an vulkanisierten Gummieinlagen 12 bzw. 14 am Greiferkörper angeordnet. Die Dicke und die Härte der eingeklebten Gummieinlagen sind der vorgesehenen Schliessgeschwindigkeit und der Schliesskraft der formschlüssigen Verbindung zwischen den Klemmbacken 16 und 10 angepasst.The
In einem alternativen Ausführungsbeispiel, das der gleich zeichnerischen Darstellung wie das in
In einer alternativen Ausführung des oben beschriebenen Greifers ist der Formschluss nicht über die gesamte Greiferbreite vorgesehen, sondern nur an dessen Rand. Um hier ein Abscheren des Schussfadens zu vermeiden, wird in dieser Ausführung ein Spalt 18 zwischen den Klemmbacken 10 und 16 ausgebildet.In an alternative embodiment of the gripper described above, the positive connection is not provided over the entire gripper width, but only at the edge. To avoid shearing of the weft thread here, a gap 18 is formed between the
- 22
- Greiferkopf eines Bring- oder HolgreifersGripper head of a Bring or Holgreifers
- 88th
- Greifkörpergripping body
- 1010
- untere Klemmbackelower jaw
- 1212
- Gummieinlagerubber insert
- 1414
- Gummieinlagerubber insert
- 1616
- obere Klemmbackeupper jaw
- 1818
- Spaltgap
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07022657A EP2063008A1 (en) | 2007-11-22 | 2007-11-22 | Gripper device for inserting the weft thread of a rapier weaving machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07022657A EP2063008A1 (en) | 2007-11-22 | 2007-11-22 | Gripper device for inserting the weft thread of a rapier weaving machine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2063008A1 true EP2063008A1 (en) | 2009-05-27 |
Family
ID=39365574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07022657A Withdrawn EP2063008A1 (en) | 2007-11-22 | 2007-11-22 | Gripper device for inserting the weft thread of a rapier weaving machine |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2063008A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103221598A (en) * | 2010-11-18 | 2013-07-24 | 林道尔·多尼尔有限责任公司 | Gripper head for the insertion of weft threads on a gripper weaving machine |
CN103789910A (en) * | 2012-11-02 | 2014-05-14 | 吴江市嘉运纺织整理有限公司 | Yarn gripper for weaving machines |
CN104975410A (en) * | 2014-10-23 | 2015-10-14 | 铜陵梧桐树农业发展有限公司 | Weft connecting sword used for rapier loom |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH556930A (en) | 1972-08-14 | 1974-12-13 | Dornier Gmbh Lindauer | WEFT INSERTION DEVICE ON SHUTTERLESS WEAVING MACHINES. |
DE2517011B1 (en) * | 1975-04-17 | 1976-05-26 | Dornier Gmbh Lindauer | CLAMPING DEVICE ON GRIPPER HEADS FOR CONTACTORLESS WEAVING MACHINES |
GB2034769A (en) * | 1978-11-15 | 1980-06-11 | Saurer Ag Adolph | A Thread Gripper |
US5007463A (en) * | 1988-08-19 | 1991-04-16 | Nuovopignone-Industrie Meccaniche E Fonderia, S.P.A. | Weft clamping system for inserter rapier |
EP0940490A1 (en) | 1998-03-05 | 1999-09-08 | Sulzer Rüti Ag | Thread clamp for a loom and loom with such a thread clamp |
-
2007
- 2007-11-22 EP EP07022657A patent/EP2063008A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH556930A (en) | 1972-08-14 | 1974-12-13 | Dornier Gmbh Lindauer | WEFT INSERTION DEVICE ON SHUTTERLESS WEAVING MACHINES. |
DE2517011B1 (en) * | 1975-04-17 | 1976-05-26 | Dornier Gmbh Lindauer | CLAMPING DEVICE ON GRIPPER HEADS FOR CONTACTORLESS WEAVING MACHINES |
GB2034769A (en) * | 1978-11-15 | 1980-06-11 | Saurer Ag Adolph | A Thread Gripper |
US5007463A (en) * | 1988-08-19 | 1991-04-16 | Nuovopignone-Industrie Meccaniche E Fonderia, S.P.A. | Weft clamping system for inserter rapier |
EP0940490A1 (en) | 1998-03-05 | 1999-09-08 | Sulzer Rüti Ag | Thread clamp for a loom and loom with such a thread clamp |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103221598A (en) * | 2010-11-18 | 2013-07-24 | 林道尔·多尼尔有限责任公司 | Gripper head for the insertion of weft threads on a gripper weaving machine |
CN103221598B (en) * | 2010-11-18 | 2014-11-05 | 林道尔·多尼尔有限责任公司 | Gripper head for the insertion of weft threads on a gripper weaving machine |
CN103789910A (en) * | 2012-11-02 | 2014-05-14 | 吴江市嘉运纺织整理有限公司 | Yarn gripper for weaving machines |
CN104975410A (en) * | 2014-10-23 | 2015-10-14 | 铜陵梧桐树农业发展有限公司 | Weft connecting sword used for rapier loom |
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