EP0165326B1 - Guideway for the weft inserter of a loom, especially for a dummy shuttle loom - Google Patents

Guideway for the weft inserter of a loom, especially for a dummy shuttle loom Download PDF

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Publication number
EP0165326B1
EP0165326B1 EP19840107017 EP84107017A EP0165326B1 EP 0165326 B1 EP0165326 B1 EP 0165326B1 EP 19840107017 EP19840107017 EP 19840107017 EP 84107017 A EP84107017 A EP 84107017A EP 0165326 B1 EP0165326 B1 EP 0165326B1
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EP
European Patent Office
Prior art keywords
guide
projectile
horizontal
support
hook
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
EP19840107017
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German (de)
French (fr)
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EP0165326A1 (en
Inventor
Erwin Pfarrwaller
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.)
Sulzer AG
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Gebrueder Sulzer AG
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Filing date
Publication date
Application filed by Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Priority to DE8484107017T priority Critical patent/DE3473619D1/en
Priority to EP19840107017 priority patent/EP0165326B1/en
Publication of EP0165326A1 publication Critical patent/EP0165326A1/en
Application granted granted Critical
Publication of EP0165326B1 publication Critical patent/EP0165326B1/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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • 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
    • D03D47/24—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 by gripper or dummy shuttle

Definitions

  • the invention relates to a guide device for weft insertion elements of weaving machines, in particular rapier projectile weaving machines, with guide teeth, each having a guide support and a guide hook, which form an outlet opening for the weft thread.
  • Known projectile guiding devices (CH-PS 465521; CH-PS 315854) have guide teeth with a relatively small outlet opening for the weft thread.
  • This has the disadvantage for shed geometries to achieve tissue image structures of a special kind that if the guiding device dips down out of the shed while the shed is being closed at the same time, the weft thread is hindered when leaving the guiding device.
  • This disadvantage is particularly evident in so-called "in-bag weaving" because the upper and lower warp threads are then at a lower level, i.e. tick below the normal web level. The weft then strikes hard along the upper inner edge of the guide tooth, which leads to undesirable streaking in the tissue.
  • German patent DE-C 767 275 describes in Fig. A guide tooth in which the upper free end of the guide support is higher than the inner edge of the guide tooth.
  • the guide support and guide tooth form an opening for the weft threads which is directed practically vertically upwards. Unwanted streaking can also occur in this embodiment, namely because the upstanding free end of the guide support strips the inserted weft thread when the guide teeth are pivoted away from the compartment.
  • the invention has for its object to provide a guide device of the type defined, with which streaking in the tissue is avoided. According to the invention, this object is achieved by the features specified in the characterizing part of claim 1.
  • the dependent claims relate to particularly advantageous embodiments of the invention.
  • a drawer 1 carries a projectile guide device 2, which consists of a number of guide teeth 3, which are cast in a block 4.
  • the guide teeth 3 have an outlet opening 5 for the weft thread.
  • a projectile located in the guide channel 6 and the weft thread carried by it are identified by the reference numbers 7 and 8, respectively.
  • the drawer 1 with the guide device 2 is located in front of the stop of the weft thread 8 in a shed 9, formed by the warp threads 10 and 11.
  • the position of the guide device 2 when the weft thread 8 stops in the shed pocket 9 is denoted by 2 '.
  • Each guide tooth 3 has a guide support 3 'and a guide hook 3 ", which closes off the guide channel 6 at the top.
  • the guide support 3' and the guide hook 3" have a length such that the outlet opening 5 for the weft thread 8 is only insignificant from the adjacent one Page 7 'of the projectile 7 is removed, and runs essentially parallel to the bevel 7 "of the projectile.
  • the dimensions of the outlet opening 5 and their arrangement, based on the projectile 7 located in the guide channel 6, can be defined in the position of the guide teeth 3 in which the projectile is in a horizontal position.
  • the outlet opening 5 between the guide hook and the guide support in both examples, meet the condition y> d in the vertical direction and the conditions x b 9 L in the horizontal direction, a particularly advantageous case of the conditions x G b and x G L.
  • X means the horizontal distance of the vertical center line through the center M of the projectile cross-section, from the outer free end of the guide hook 3 "of the guide tooth 3, in the horizontal direction, b half the projectile width, L the horizontal distance of the vertical center line through the center M of the projectile cross-section from the outer free end of the guide support 3 ', in the horizontal direction, y the vertical distance between the upper free end of the guide support 3 'and the horizontal inner edge 3 "' of the guide hook 3" and d half the height of the projectile 7.
  • FIG. 1 A guide device 15 consists of a number of guide supports 16 and guide hooks 17 which are cast in a block 18. The support 16 and hook 17 alternate in the longitudinal direction of the guide device and form a pair of complementary guide teeth 19, leaving an exit opening 20 for the weft thread.
  • the projectile is identified by reference number 21. The same conditions apply to the outlet opening 20 as are specified for the outlet opening 5 of FIG. 1.

Description

Die Erfindung betrifft eine Führungsvorrichtung für Schussfadeneintragsorgane von Webmaschinen, insbesondere Greiferprojektil-Webmaschinen, mit Führungszähnen, die je eine Führungsstütze und einen Führungshaken aufweisen, die eine Austrittsöffnung für den Schussfaden bilden.The invention relates to a guide device for weft insertion elements of weaving machines, in particular rapier projectile weaving machines, with guide teeth, each having a guide support and a guide hook, which form an outlet opening for the weft thread.

Bekannte Projektilführungsvorrichtungen (CH-PS 465521; CH-PS 315854) weisen Führungszähne auf mit einer verhältnismässig kleinen Austrittsöffnung für den Schussfaden. Dies hat für Webfachgeometrien zur Erzielung von Gewebebildstrukturen besonderer Art den Nachteil, dass, wenn die Führungsvorrichtung nach unten aus dem Webfach wegtaucht, bei gleichzeitigem Schliessen des Webfaches, der Schussfaden beim Verlassen der Führungsvorrichtung behindert wird. Dieser Nachteil tritt besonders beim sogenannten «im-Sack-weben» in Erscheinung, weil dann die oberen und die unteren Kettfäden auf einem tieferen Niveau, d.h. unterhalb der normalen Webebene kreuzen. Der Schussfaden streift dann hart an der oberen Innenkante des Führungszahnes entlang, was zu einer unerwünschten Streifenbildung im Gewebe führt.Known projectile guiding devices (CH-PS 465521; CH-PS 315854) have guide teeth with a relatively small outlet opening for the weft thread. This has the disadvantage for shed geometries to achieve tissue image structures of a special kind that if the guiding device dips down out of the shed while the shed is being closed at the same time, the weft thread is hindered when leaving the guiding device. This disadvantage is particularly evident in so-called "in-bag weaving" because the upper and lower warp threads are then at a lower level, i.e. tick below the normal web level. The weft then strikes hard along the upper inner edge of the guide tooth, which leads to undesirable streaking in the tissue.

Die deutsche Patentschrift DE-C 767 275 beschreibt in Fig. einen Führungszahn, bei dem das obere freie Ende der Führungsstütze höher als die Innenkante des Führungszahns liegt. Bei derartigen Führungszähnen bilden Führungsstütze und Führungszahn eine Öffnung für die Schussfäden, die praktisch senkrecht nach oben gerichtet ist. Auch bei dieser Ausführung kann die unerwünschte Streifenbildung auftreten, indem nämlich das hochstehende freie Ende der Führungsstütze beim Wegschwenken der Führungszähne aus dem Fach den eingetragenen Schussfaden streift.German patent DE-C 767 275 describes in Fig. A guide tooth in which the upper free end of the guide support is higher than the inner edge of the guide tooth. With guide teeth of this type, the guide support and guide tooth form an opening for the weft threads which is directed practically vertically upwards. Unwanted streaking can also occur in this embodiment, namely because the upstanding free end of the guide support strips the inserted weft thread when the guide teeth are pivoted away from the compartment.

Der Erfindung liegt die Aufgabe zugrunde, eine Führungsvorrichtung der eingangs definierten Art zu schaffen, mit der Streifenbildung im Gewebe vermieden wird. Diese Aufgabe wird erfindungsgemäss durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst. Die abhängigen Ansprüche beziehen sich auf besonders vorteilhafte Ausführungsformen der Erfindung.The invention has for its object to provide a guide device of the type defined, with which streaking in the tissue is avoided. According to the invention, this object is achieved by the features specified in the characterizing part of claim 1. The dependent claims relate to particularly advantageous embodiments of the invention.

Zwei Ausführungsbeispiele des Erfindungsgegenstandes sind nachfolgend anhand der Zeichnung beschrieben. Es ist:

  • Fig. eine Seitenansicht einer Projektilführungsvorrichtung gemäss der Erfindung mit ganzen Führungszähnen,
  • Fig.2 eine Seitenansicht einer Projektilführungsvorrichtung mit geteilten Führungszähnen.
Two embodiments of the subject matter of the invention are described below with reference to the drawing. It is:
  • 1 shows a side view of a projectile guiding device according to the invention with entire guide teeth,
  • 2 shows a side view of a projectile guide device with split guide teeth.

Nach Fig. 1 trägt eine Lade 1 eine Projektilführungsvorrichtung 2, die aus einer Anzahl Führungszähnen 3 besteht, die in einem Block 4 eingegossen sind. Die Führungszähne 3 weisen eine Austrittsöffnung 5 für den Schussfaden auf. Ein im Führungskanal 6 befindliches Projektil und der von diesem mitgeführte Schussfaden sind mit den Bezugsnummern 7 bzw. 8 bezeichnet. Die Lade 1 mit der Führungsvorrichtung 2 befindet sich vor dem Anschlag des Schussfadens 8 in einem Webfach 9, gebildet durch die Kettfäden 10 und 11. Die Lage der Führungsvorrichtung 2 beim Anschlag des Schussfadens 8 in das Webfach 9 ist mit 2' bezeichnet. Jeder Führungszahn 3 weist eine Führungsstütze 3' und einen Führungshaken 3" auf, der den Führungskanal 6 nach oben abschliesst. Die Führungsstütze 3' und der Führungshaken 3" haben eine solche Länge, dass die Austrittsöffnung 5 für den Schussfaden 8 nur unwesentlich von der anliegenden Seite 7' des Projektils 7 entfernt ist, und im wesentlichen parallel zur Anschrägung 7" des Projektils verläuft. Fig. 1 zeigt deutlich, dass die Austrittsöffnung 12 eines bekannten Zahnes, der mit strichpunktierter Linie angegeben ist und dessen Ende sich so dicht nähern, dass nur eine kleine Austrittsöffnung verbleibt. Durch die grosse Austrittsöffnung für den Schussfaden kann dieser, wenn die Führungsvorrichtung zum Anschlagen des Schussfadens nach unten wegtaucht bei gleichzeitigem Schliessen des Webfaches, unbehindert austreten. DievergrösserteSchussfadenaustritts- öffnung, d.h. die Verkürzung des insbesonderen oberen Schnabelteils des Führungszahnes, wirkt sich weiterhin positiv in dem Zusammenhang aus, dass einerseits durch die spätere Berührung des Gewebes durch die Führungszähne beim Eintauchen in die Kette und andererseits durch früheres Trennen von der Kette, den Kettfäden eine längere Zeit bleibt, um ihre teilungsgetreue Lage nach der vorgängigen Verdrängung wieder einzunehmen. Dadurch ergibt sich ein regelmässiges Gewebebild. Besonders vorteilhaft wirkt sich dieser Umstand beim Weben mit ungedrehten Filamentgarnen aus, denn bei diesen Garnen tauchen bekanntlich die Führungszähne oft zwischen die einzelnen Fibrillen eines Fadens, wodurch bisher das Gewebebild unerwünscht beeinträchtigt wurde.1, a drawer 1 carries a projectile guide device 2, which consists of a number of guide teeth 3, which are cast in a block 4. The guide teeth 3 have an outlet opening 5 for the weft thread. A projectile located in the guide channel 6 and the weft thread carried by it are identified by the reference numbers 7 and 8, respectively. The drawer 1 with the guide device 2 is located in front of the stop of the weft thread 8 in a shed 9, formed by the warp threads 10 and 11. The position of the guide device 2 when the weft thread 8 stops in the shed pocket 9 is denoted by 2 '. Each guide tooth 3 has a guide support 3 'and a guide hook 3 ", which closes off the guide channel 6 at the top. The guide support 3' and the guide hook 3" have a length such that the outlet opening 5 for the weft thread 8 is only insignificant from the adjacent one Page 7 'of the projectile 7 is removed, and runs essentially parallel to the bevel 7 "of the projectile. FIG. 1 clearly shows that the outlet opening 12 of a known tooth, which is indicated by a dash-dotted line, and whose end is approaching so closely that Only a small exit opening remains, and the large exit opening for the weft thread allows the weft thread to emerge unhindered when the guide device for hitting the weft thread dips downwards while simultaneously closing the shed continue to be positive in the context from the fact that, on the one hand, the later contact of the fabric by the guide teeth when immersing it in the chain and, on the other hand, by earlier separation from the chain, the warp threads remain for a longer time in order to resume their position of division after the previous displacement. This results in a regular tissue image. This fact has a particularly advantageous effect when weaving with untwisted filament yarns, since it is known that with these yarns the guide teeth often dip between the individual fibrils of a thread, which has previously undesirably affected the fabric image.

Die Abmessungen der Austrittsöffnung 5 und deren Anordnung, kann, bezogen auf das sich im Führungskanal 6 befindliche Projektil 7, in der Position der Führungszähne 3 bei der sich das Projektil in horizontaler Lage befindet, definiert werden. Die Austrittsöffnung 5 zwischen Führungshaken und Führungsstütze, erfüllen in beiden Beispielen in vertikaler Richtung die Bedingung y > d, und in horizontaler Richtung die Bedingungen x b 9 L einem besonders vorteilhaften Fall der Bedingung x G b und x G L.The dimensions of the outlet opening 5 and their arrangement, based on the projectile 7 located in the guide channel 6, can be defined in the position of the guide teeth 3 in which the projectile is in a horizontal position. The outlet opening 5 between the guide hook and the guide support, in both examples, meet the condition y> d in the vertical direction and the conditions x b 9 L in the horizontal direction, a particularly advantageous case of the conditions x G b and x G L.

Dabei bedeutet x den horizontalen Abstand der vertikalen Zenterlinie durch den Mittelpunkt M des Projektilquerschnittes, vom äusseren freien Ende des Führungshakens 3" des Führungszahnes 3, in horizontaler Richtung, b die halbe Projektilbreite, L den horizontalen Abstand der vertikalen Zenterlinie durch den Mittelpunkt M des Projektilquerschnittes vom äusseren freien Ende der Führungsstütze 3', in horizontaler Richtung, y den vertikalen Abstand zwischen dem oberen freien Ende der Führungsstütze 3' und der horizontalen Innenkante 3"' des Führungshakens 3" und d die halbe Höhe des Projektils 7.X means the horizontal distance of the vertical center line through the center M of the projectile cross-section, from the outer free end of the guide hook 3 "of the guide tooth 3, in the horizontal direction, b half the projectile width, L the horizontal distance of the vertical center line through the center M of the projectile cross-section from the outer free end of the guide support 3 ', in the horizontal direction, y the vertical distance between the upper free end of the guide support 3 'and the horizontal inner edge 3 "' of the guide hook 3" and d half the height of the projectile 7.

Die Erfindung wurde hier für eine Projektilführungsvorrichtung mit ganzen Führungszähnen beschrieben. Selbstverständlich ist sie auch anwendbar auf eine Projektilführungsvorrichtung, die aus paarweise komplementär einen Führungszahn bildenden Führungsstütze und Führungshaken besteht. Eine solche Führungsvorrichtung ist in Fig. gezeigt. Eine Führungsvorrichtung 15 besteht aus einer Anzahl Führungsstützen 16 und Führungshaken 17, die in einem Block 18 eingegossen sind. Die Stütze 16 und Haken 17 wechseln einander in Längsrichtung der Führungsvorrichtung ab und bilden paarweise komplementär einen Führungszahn 19, unter Belassung einer Austrittsöffnung 20 für den Schussfaden. Das Projektil ist mit der Bezugsnummer 21 bezeichnet. Für die Austrittsöffnung 20 gelten dieselben Bedingungen wie die für die Austrittsöffnung 5 der Fig. 1 angegeben sind.The invention has been described here for a projectile guiding device with entire guiding teeth. Of course, it can also be applied to a projectile guide device which consists of a pair of guide supports and guide hooks which form a complementary guide tooth. Such a guide device is shown in FIG. A guide device 15 consists of a number of guide supports 16 and guide hooks 17 which are cast in a block 18. The support 16 and hook 17 alternate in the longitudinal direction of the guide device and form a pair of complementary guide teeth 19, leaving an exit opening 20 for the weft thread. The projectile is identified by reference number 21. The same conditions apply to the outlet opening 20 as are specified for the outlet opening 5 of FIG. 1.

Obschon die Erfindung für Greiferprojektil-Webmaschinen beschrieben ist, ist sie selbstverständlich auch für andere Webmaschinenarten verwendbar, z.B. für Bandgreiferwebmaschinen.Although the invention has been described for rapier projectile weaving machines, it can of course also be used for other types of weaving machines, e.g. for belt rapier weaving machines.

Claims (4)

1. A guide for weft-picking elements of weaving machines, more particularly gripper projectile weaving machines, the guide having guide teeth (3), each comprising a guide support (3') and a guide hook (3") forming an exit aperture (5) for the weft yarn, characterised in that the top free end of the support (3') is at a lower level than the inner edge of the guide hook (3") and the exit aperture (5), referred to dimensions of the projectiles and in that position of the guide teeth (3) in which the projectile (7) is in the horizontal position, satisfies the conditions: x G b and x ≤ L in the horizontal direction and the condition x > d in the vertical direction, where x denotes the horizontal distance between the vertical centreline through the centre M of the projectile cross-section and the outer free end of the guide hook (3") of the guide tooth (3), in the horizontal direction; b denotes half the width of the projectile; L denotes the horizontal distance between the vertical centre line through the centre M of the projectile cross-section and the outer free end of the support (3'), in the horizontal direction; y denotes the vertical distance between the top free end of the support (3') and the horizontal inside edge (3"') of the hook (3") thereabove; and d denotes half the height of the projectile (7).
2. A projectile guide according to claim 1, characterised in that the condition x ≤ b ≤ L is satisfied in the horizontal direction.
3. A projectile guide according to claim 1, characterised in that thex L L G b is satisfied in the horizontal direction.
4. A projectile guide according to any one of claims 1-3, characterised in that the guide (15) has guide teeth (19) formed by separate guide hooks (17) and supports (16).
EP19840107017 1984-06-19 1984-06-19 Guideway for the weft inserter of a loom, especially for a dummy shuttle loom Expired EP0165326B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8484107017T DE3473619D1 (en) 1984-06-19 1984-06-19 Guideway for the weft inserter of a loom, especially for a dummy shuttle loom
EP19840107017 EP0165326B1 (en) 1984-06-19 1984-06-19 Guideway for the weft inserter of a loom, especially for a dummy shuttle loom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19840107017 EP0165326B1 (en) 1984-06-19 1984-06-19 Guideway for the weft inserter of a loom, especially for a dummy shuttle loom

Publications (2)

Publication Number Publication Date
EP0165326A1 EP0165326A1 (en) 1985-12-27
EP0165326B1 true EP0165326B1 (en) 1988-08-24

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EP19840107017 Expired EP0165326B1 (en) 1984-06-19 1984-06-19 Guideway for the weft inserter of a loom, especially for a dummy shuttle loom

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DE (1) DE3473619D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3561477D1 (en) * 1985-05-03 1988-02-25 Sulzer Ag Weft insertion device for a gripper shuttle loom
FR2648161B1 (en) * 1989-06-09 1991-10-04 Saurer Diederichs Sa SUPPORT AND GUIDANCE DEVICE FOR MECHANICAL WEFT INSERTION DEVICES IN A NON-SHUTTLE WEAVING MACHINE
DE10346225A1 (en) * 2003-09-23 2005-05-19 Picanol N.V. Guide element for a rapier band

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE767275C (en) * 1940-03-31 1952-05-02 Sulzer Ag Loom, in particular rapier loom with fixed weft bobbins
FR1069980A (en) * 1952-01-25 1954-07-15 Sulzer Ag Guide device for loom claw shuttles
US3556163A (en) * 1968-12-06 1971-01-19 Sulzer Ag Guide for weft-picking means in a loom

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Publication number Publication date
EP0165326A1 (en) 1985-12-27
DE3473619D1 (en) 1988-09-29

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