EP0203256B1 - Weft insertion device for looms with swivel-mounted nozzles, and process for the pneumatic insertion of weft lengths - Google Patents

Weft insertion device for looms with swivel-mounted nozzles, and process for the pneumatic insertion of weft lengths Download PDF

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Publication number
EP0203256B1
EP0203256B1 EP86101323A EP86101323A EP0203256B1 EP 0203256 B1 EP0203256 B1 EP 0203256B1 EP 86101323 A EP86101323 A EP 86101323A EP 86101323 A EP86101323 A EP 86101323A EP 0203256 B1 EP0203256 B1 EP 0203256B1
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EP
European Patent Office
Prior art keywords
blast nozzles
picking
weft
pneumatic
nozzles
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
Application number
EP86101323A
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German (de)
French (fr)
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EP0203256A1 (en
Inventor
Adolf Wulf
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.)
Guenne Webmaschinenfabrik & Co KG GmbH
GUNNE WEBMASCHINENFABRIK GmbH and Co KG
Original Assignee
Guenne Webmaschinenfabrik & Co KG GmbH
GUNNE WEBMASCHINENFABRIK GmbH and Co KG
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Publication date
Application filed by Guenne Webmaschinenfabrik & Co KG GmbH, GUNNE WEBMASCHINENFABRIK GmbH and Co KG filed Critical Guenne Webmaschinenfabrik & Co KG GmbH
Publication of EP0203256A1 publication Critical patent/EP0203256A1/en
Application granted granted Critical
Publication of EP0203256B1 publication Critical patent/EP0203256B1/en
Expired legal-status Critical Current

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    • 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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • D03D47/3046—Weft yarn selection

Definitions

  • the present invention relates to a weft insertion device for weaving machines according to the preamble of claim 1 and a method for pneumatic insertion according to the preamble of claim 4.
  • the invention is therefore based on the object of improving the weft insertion device mentioned at the outset in such a way that it ensures flawless, maintenance-insensitive operation with four, six or more blowing nozzles while avoiding the disadvantages of the prior art mentioned.
  • the weft insertion device characterized in claim 1. Then four, six or more blowing nozzles are arranged horizontally in close proximity in pairs in front of the U-shaped channel or another air guidance system (confuser) of the reed beam, so that pivoting or rotating the nozzle body is unnecessary.
  • blowing nozzles are mounted in the front area on one or more pneumatic cylinders, which can be arranged side by side or one behind the other. They effect the actual pivoting of the nozzles by conventional control, a corresponding number of compression springs being provided on the opposite side, which act as a suspension or counterforce in order to dampen undesired vibrations or ensure the precise entry of the desired weft thread.
  • Fig. 1 is a perspective schematic view of the weft insertion device according to the invention.
  • the weft insertion device according to the invention for weaving machines with pivotable blowing nozzles is generally designated 10.
  • the main or blowing nozzles 18 are connected to the sley 26 at their rear end via the nozzle body 13.
  • the blowing nozzles 18 can be pivoted vertically around the center of gravity 36 of the nozzle body 13.
  • Each of the six blowing nozzles 18 shown has its own storage or cutting device (not shown).
  • the six weft threads to be entered are designated 32.
  • Each of the tubular nozzles 18 has its own compressed air line 19, which are each connected to corresponding compressed air containers (not shown).
  • the holder 52 which combines the blowing nozzles 18 in their front area and in turn connects them to the sley 26.
  • two pneumatic cylinders 34a and 34b are arranged one behind the other and below the blowpipes 18. They are in contact with two clamps 37 which surround the blow nozzles 18 and which bundle the tubes together.
  • a compression spring 35 is arranged above the clamps 37, which cooperate as a counterforce with the pneumatic cylinders 34a and 34b, since they are clamped between the clamps 37 and the holder 52.
  • the number and arrangement of the pneumatic cylinders 34 and the compression spring 35 is not critical, but can be selected within a suitable framework, as long as it is ensured that a correct and precise pivoting of the tubular blowing nozzles 18 is ensured, so that the respective shot lengths 32 are obtained from the desired ones Blow nozzles 18 can enter the U-shaped channel 14 of the reed 16.
  • This is shown more clearly in cross section at the bottom left in FIG. 1, where the openings 1 and 2 of the uppermost blowing nozzles 18 are in the entry position for the U-shaped channel 14 of the reed 16, while the middle openings 3 and 4 and the lower openings 5 and 6 of the blowing nozzles 18 are below the entry position and are therefore in the rest position.
  • the weft insertion device according to the invention for weaving machines in the basic position shown can insert color and / or quality from the openings 1 and / or 2 of the blowing nozzles.
  • the pneumatic cylinder 34a When the pneumatic cylinder 34a is actuated, the openings 3 and / or 4 of the blow nozzles 18 are brought into the firing position, while the actuation of the pneumatic cylinder 34b ensures that the openings 5 and 6 of the blow nozzles 18 are brought into the desired firing position.
  • this system can be expanded to include other colors and / or qualities. It is also think bar that only one pneumatic cylinder 34 is used, the stroke of which is controlled in different ways.

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

Description

Die vorliegende Erfindung betrifft eine Schusseintragungsvorrichtung für Webmaschinen nach dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zum pneumatischen Eintragen gemäss dem Oberbegriff des Patentanspruchs 4.The present invention relates to a weft insertion device for weaving machines according to the preamble of claim 1 and a method for pneumatic insertion according to the preamble of claim 4.

Im Stand der Technik sind verschiedene Schusseintragungsvorrichtungen für Webmaschinen und entsprechende Verfahren bekanntgeworden. Bei mit ortsfesten Blasdüsen arbeitenden Schusseintragungsvorrichtungen ist die Anzahl der Blasdüsen aufgrund der ihnen eigenen Grössen- und Abstandsverhältnisse relativ beschränkt, da sämtliche Blasdüsen zu jeglicher Zeit eine wirksame Schusseintragungsposition zum U-förmigen Tunnel des Rietes oder einem anderen Luftführungssystem (Konfusor) besitzen müssen. Bei schwenkbaren Blasdüsen ist ihre Anzahl insofern kritisch, als dass bei steigender Zahl der Schwenkweg länger wird und die Geschwindigkeit bei den ohnehin kurzen Zeitspannen aufeinanderfolgender Webzykli dann gesteigert werden muss, was nicht nur zu Verschleisserscheinungen und damit zu grösserer Wartungsanfälligkeit führt, sondern auch ungenauen Eintragspositionen.Various weft insertion devices for weaving machines and corresponding methods have become known in the prior art. In the case of weft insertion devices working with stationary blower nozzles, the number of blower nozzles is relatively limited due to their own size and spacing ratios, since all of the blower nozzles must have an effective weft insertion position at all times with respect to the U-shaped tunnel of the reed or another air guidance system (confuser). In the case of swiveling blow nozzles, their number is critical insofar as the number of swivels becomes longer as the number increases, and the speed then has to be increased in the anyway short periods of time of successive weaving cycles, which not only leads to signs of wear and tear and therefore to greater maintenance, but also imprecise entry positions.

Der Erfindung liegt deshalb die Aufgabe zugrunde, die eingangs genannte Schusseintragungsvorrichtung derart zu verbessern, dass sie eine einwandfreie, wartungsunanfällige Arbeitsweise bei vier, sechs oder mehr Blasdüsen unter Vermeidung der genannten Nachteile des genannten Standes der Technik sicherstellt.The invention is therefore based on the object of improving the weft insertion device mentioned at the outset in such a way that it ensures flawless, maintenance-insensitive operation with four, six or more blowing nozzles while avoiding the disadvantages of the prior art mentioned.

Die vorstehende Aufgabe wird erfindungsgemäss durch die im Anspruch 1 gekennzeichnete Schusseintragungsvorrichtung gelöst. Danach werden vier, sechs oder mehr Blasdüsen paarweise horizontal eng benachbart vor dem U-förmigen Kanal oder einem anderen Luftführungssystem (Konfusor) des Rietbalkens angeordnet so dass ein Verschwenken oder ein Drehen des Düsenkörpers überflüssig wird.The above object is achieved according to the invention by the weft insertion device characterized in claim 1. Then four, six or more blowing nozzles are arranged horizontally in close proximity in pairs in front of the U-shaped channel or another air guidance system (confuser) of the reed beam, so that pivoting or rotating the nozzle body is unnecessary.

Von erfindungsgemässer Bedeutung ist ferner die Tatsache, dass die Blasdüsen im vorderen Bereich auf einem oder mehreren pneumatischen Zylindern, die nebeneinander oder hintereinander angeordnet sein können, gelagert sind. Sie bewirken durch übliche Ansteuerung das eigentliche Verschwenken der Düsen, wobei auf der gegenüberliegenden Seite eine entsprechende Anzahl von Druckfedern vorgesehen ist, die als Federungs- bzw. Gegenkraft wirken, um unerwünschte Schwingungen zu dämpfen bzw. die präzise Eintragung des gewünschten Schussfadens gewährleisten.Of further importance according to the invention is the fact that the blowing nozzles are mounted in the front area on one or more pneumatic cylinders, which can be arranged side by side or one behind the other. They effect the actual pivoting of the nozzles by conventional control, a corresponding number of compression springs being provided on the opposite side, which act as a suspension or counterforce in order to dampen undesired vibrations or ensure the precise entry of the desired weft thread.

Weitere Vorteile und Merkmale gehen aus den vorstehenden Unteransprüchen hervor, die einzeln oder auch gemeinsam von erfindungsgemässer Bedeutung sein können.Further advantages and features emerge from the preceding subclaims, which individually or together can be of importance according to the invention.

Im folgenden wird ein bevorzugtes Ausführungsbeispiel anhand der Zeichnung näher beschrieben. Es zeigt:A preferred exemplary embodiment is described in more detail below with reference to the drawing. It shows:

Fig. 1 eine perspektivische Schemaansicht der erfindungsgemässen Schusseintragungsvorrichtung.Fig. 1 is a perspective schematic view of the weft insertion device according to the invention.

In Fig. 1 ist die erfindungsgemässe Schusseintragungsvorrichtung für Webmaschinen mit schwenkbaren Blasdüsen allgemein mit 10 bezeichnet. Der besseren Übersicht halber ist die Webmaschine nicht in ihrer Gesamtheit gezeigt, damit die erfindungsgemässen Details besser erkennbar sind. Die Haupt- bzw. Blasdüsen 18 sind über den Düsenkörper 13 an ihrem hinteren Ende mit der Weblade 26 verbunden. Die vertikale Schwenkbarkeit der Blasdüsen 18 erfolgt dabei um den Schwerpunkt 36 des Düsenkörpers 13. Jede einzelne der sechs gezeigten Blasdüsen 18 besitzt eine eigene Speicher- bzw. Ablängungsvorrichtung (nicht gezeigt). Die einzutragenden sechs Schussfäden sind mit 32 bezeichnet. Jede der rohrförmigen Düsen 18 besitzt eine eigene Druckluftleitung 19, die jeweils mit entsprechenden Druckluftbehältern (nicht gezeigt) verbunden sind.In Fig. 1, the weft insertion device according to the invention for weaving machines with pivotable blowing nozzles is generally designated 10. For the sake of a better overview, the weaving machine is not shown in its entirety, so that the details according to the invention can be better recognized. The main or blowing nozzles 18 are connected to the sley 26 at their rear end via the nozzle body 13. The blowing nozzles 18 can be pivoted vertically around the center of gravity 36 of the nozzle body 13. Each of the six blowing nozzles 18 shown has its own storage or cutting device (not shown). The six weft threads to be entered are designated 32. Each of the tubular nozzles 18 has its own compressed air line 19, which are each connected to corresponding compressed air containers (not shown).

Von besonderer erfindungsgemässer Bedeutung ist die Halterung 52, welche die Blasdüsen 18 in ihrem vorderen Bereich zusammenfasst und wiederum mit der Weblade 26 verbindet. Auf der Grundfläche 38 dieser Halterung 52 sind zwei pneumatische Zylinder 34a und 34b hintereinander und unterhalb der Blasrohre 18 angeordnet. Sie stehen in Kontakt mit zwei die Blasdüsen 18 umgebenden Klammern 37, welche die Rohre bündelsmässig zusammenfassen. Oberhalb der Klammern 37 sind jeweils eine Druckfeder 35 angeordnet, die als Gegenkraft mit den pneumatischen Zylindern 34a und 34b zusammenwirken, da sie zwischen den Klammern 37 und der Halterung 52 eingespannt sind. Die Anzahl und Anordnung der pneumatischen Zylinder 34 und der Druckfeder 35 ist nicht kritisch, sondern kann im geeigneten Rahmen gewählt werden, solange sichergestellt ist, dass ein einwandfreies und präzises Verschwenken der rohrförmigen Blasdüsen 18 gewährleistet ist, so dass die jeweiligen Schusslängen 32 aus den gewünschten Blasdüsen 18 in den U-förmigen Kanal 14 des Rietes 16 eintreten können. Deutlicher ist dieses links unten in Fig. 1 im Querschnitt gezeigt, wo die Öffnungen 1 und 2 der obersten Blasdüsen 18 in Einschussposition für den U-förmigen Kanal 14 des Rietes 16 liegen, während die mittleren Öffnungen 3 und 4 und die unteren Öffnungen 5 und 6 der Blasdüsen 18 unterhalb der Eintragsposition liegen und sich deshalb in Ruhestellung befinden. Erst durch ein vertikales Verschwenken der Blasdüsen 18 über den Schwenkpunkt 36 mittels der pneumatischen Zylinder 34a und b können die mittleren bzw. unteren Blasdüsen 18 mit ihren Öffnungen 3 und 4 bzw. 5 und 6 in die gewünschte Schussposition gebracht werden. Die Steuerung für die pneumatischen Zylinder ist nicht gezeigt, da sie für den Fachmann auf der Hand liegt.Of particular importance according to the invention is the holder 52, which combines the blowing nozzles 18 in their front area and in turn connects them to the sley 26. On the base 38 of this holder 52, two pneumatic cylinders 34a and 34b are arranged one behind the other and below the blowpipes 18. They are in contact with two clamps 37 which surround the blow nozzles 18 and which bundle the tubes together. A compression spring 35 is arranged above the clamps 37, which cooperate as a counterforce with the pneumatic cylinders 34a and 34b, since they are clamped between the clamps 37 and the holder 52. The number and arrangement of the pneumatic cylinders 34 and the compression spring 35 is not critical, but can be selected within a suitable framework, as long as it is ensured that a correct and precise pivoting of the tubular blowing nozzles 18 is ensured, so that the respective shot lengths 32 are obtained from the desired ones Blow nozzles 18 can enter the U-shaped channel 14 of the reed 16. This is shown more clearly in cross section at the bottom left in FIG. 1, where the openings 1 and 2 of the uppermost blowing nozzles 18 are in the entry position for the U-shaped channel 14 of the reed 16, while the middle openings 3 and 4 and the lower openings 5 and 6 of the blowing nozzles 18 are below the entry position and are therefore in the rest position. Only by vertically swiveling the blowing nozzles 18 via the pivot point 36 by means of the pneumatic cylinders 34a and b can the middle or lower blowing nozzles 18 with their openings 3 and 4 or 5 and 6 be brought into the desired firing position. The control for the pneumatic cylinders is not shown because it is obvious to a person skilled in the art.

Zusammenfassend lässt sich also feststellen, dass die erfindungsgemässe Schusseintragungsvorrichtung für Webmaschinen in der gezeigten Grundstellung Farbe und/oder Qualität aus den Öffnungen 1 und/oder 2 der Blasdüsen eintragen kann. Bei Betätigung des pneumatischen Zylinders 34a werden die Öffnungen 3 und/oder 4 der Blasdüsen 18 in Schussposition gebracht, während die Betätigung des pneumatischen Zylinders 34b dafür sorgt, dass die Öffnungen 5 und 6 der Blasdüsen 18 in die gewünschte Schussposition gebracht werden. Es versteht sich, dass dieses System auf weitere Farben und/oder Qualitäten erweitert werden kann. Auch ist es denkbar, dass nur ein pneumatischer Zylinder 34 eingesetzt wird, dessen Hub in unterschiedlicher Weise gesteuert wird.In summary, it can be stated that the weft insertion device according to the invention for weaving machines in the basic position shown can insert color and / or quality from the openings 1 and / or 2 of the blowing nozzles. When the pneumatic cylinder 34a is actuated, the openings 3 and / or 4 of the blow nozzles 18 are brought into the firing position, while the actuation of the pneumatic cylinder 34b ensures that the openings 5 and 6 of the blow nozzles 18 are brought into the desired firing position. It goes without saying that this system can be expanded to include other colors and / or qualities. It is also think bar that only one pneumatic cylinder 34 is used, the stroke of which is controlled in different ways.

Claims (5)

1. A picking mechanism for looms with pivotable blast nozzles for the pneumatic picking of succesive weft lengths of different colours and/or grades, wherein four, six or more blast nozzles are arranged in horizontal, pairwise, closely juxtaposed and superimposed manner upstream of the U-shaped channel or some other air circulation system (confusor) of the reed and are fixed by means of a nozzle body and a mounting support to the sley and wherein the nozzle body is mounted pivotably on the pivot point, whilst the blast nozzles are arranged in vertically pivotable manner in the front region by one or more pneumatic cylinders in cooperating with one or more compression springs, so that the weft lengths from the desired blast nozzles can enter the U-shaped channel or some other air circulation system.
2. A picking mechanism according to claim 1, wherein one, two or more cylinders are arranged below the blast nozzles and above one, two or more compression springs.
3. A picking mechanism according to claims 1 or 2, wherein one, two or more clips for the blast nozzles are provided within the mounting support.
4. A method for the pneumatic picking of succesive weft lengths of different colour and/or grade using the picking mechanism according to claim 1, wherein each blast nozzle is connected via a solenoid valve to its own air container, which controls the compressed air supply for the weft picking by means of a proximity switch fixed to a tie-up jacquard, jacquard loom or separate colour control means (mechanical or electronic), the stroke of the pneumatic cylinders being controlled in such a way that the desired outlet openings of the blast nozzles are located upstream of the U-shaped channel or some other air circulation system.
5. A method according to claim 4, wherein the stroke of one pneumatic cylinder is controlled in such a way that the central blast nozzles come into the picking position and wherein the stroke of the other pneumatic cylinder is controlled in such a way that the lower blast nozzles pass into the picking position relative to the U-shaped channel or some other air circulation system of the reed.
EP86101323A 1985-05-25 1986-02-01 Weft insertion device for looms with swivel-mounted nozzles, and process for the pneumatic insertion of weft lengths Expired EP0203256B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853518987 DE3518987A1 (en) 1985-05-25 1985-05-25 Weft insertion device for weaving machines with swiveling blow nozzles and method for the pneumatic insertion of successive weft lengths
DE3518987 1985-05-25

Publications (2)

Publication Number Publication Date
EP0203256A1 EP0203256A1 (en) 1986-12-03
EP0203256B1 true EP0203256B1 (en) 1988-10-26

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Application Number Title Priority Date Filing Date
EP86101323A Expired EP0203256B1 (en) 1985-05-25 1986-02-01 Weft insertion device for looms with swivel-mounted nozzles, and process for the pneumatic insertion of weft lengths

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US (1) US4703778A (en)
EP (1) EP0203256B1 (en)
DE (2) DE3518987A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2589488B2 (en) * 1987-06-11 1997-03-12 津田駒工業株式会社 Multicolor weft insertion control device for fluid jet loom
DE3815088C1 (en) * 1988-05-04 1989-12-07 Lindauer Dornier Gmbh, 8990 Lindau, De
US6223779B1 (en) * 1997-04-09 2001-05-01 Textilma Ag Auxiliary selvage forming and weft thread cutting device
DE29806552U1 (en) * 1998-04-09 1998-07-09 Dornier Gmbh Lindauer Weft insertion device for an air jet loom
BE1012620A3 (en) * 1999-04-20 2001-01-09 Picanol Nv DEVICE AND METHOD for the insertion of a weft thread in a weaving machine.
BE1025206B1 (en) * 2017-05-11 2018-12-12 Picanol Nv Mounting device for a nozzle arrangement and nozzle arrangement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3853151A (en) * 1971-01-08 1974-12-10 Rueti Te Strake Bv Weaving machine
CH571597A5 (en) * 1974-05-06 1976-01-15 Rueti Ag Maschf
NL7903273A (en) * 1979-04-25 1980-10-28 Rueti Te Strake Bv DEVICE FOR LAUNCHING SEQUENCE WIDE LENGTHS ON A SPOOLLESS WEAVING MACHINE.
DE3204007A1 (en) * 1982-02-05 1983-08-11 Guenne Webmaschf Gmbh Device and method for injecting differently coloured weft yarns in air-jet weaving machines
IT1163166B (en) * 1983-03-25 1987-04-08 Roy Electrotex Spa PRESENTER OF WEFT WIRES FOR WEAVING FRAMES
DE3415052A1 (en) * 1984-04-21 1985-10-31 Günne Webmaschinenfabrik GmbH & Co KG, 4773 Möhnesee Weft insertion device for weaving machines and method for the pneumatic insertion of successive weft lengths
US4565266A (en) * 1984-04-30 1986-01-21 Nifco Inc. Oil type damper

Also Published As

Publication number Publication date
US4703778A (en) 1987-11-03
DE3518987A1 (en) 1986-11-27
EP0203256A1 (en) 1986-12-03
DE3661027D1 (en) 1988-12-01

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