EP0165326A1 - 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
EP0165326A1
EP0165326A1 EP84107017A EP84107017A EP0165326A1 EP 0165326 A1 EP0165326 A1 EP 0165326A1 EP 84107017 A EP84107017 A EP 84107017A EP 84107017 A EP84107017 A EP 84107017A EP 0165326 A1 EP0165326 A1 EP 0165326A1
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European Patent Office
Prior art keywords
guide
projectile
horizontal
free end
hook
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Granted
Application number
EP84107017A
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German (de)
French (fr)
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EP0165326B1 (en
Inventor
Erwin Pfarrwaller
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Sulzer AG
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Sulzer AG
Gebrueder Sulzer AG
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Priority to EP19840107017 priority Critical patent/EP0165326B1/en
Priority to DE8484107017T priority patent/DE3473619D1/en
Publication of EP0165326A1 publication Critical patent/EP0165326A1/en
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Publication of EP0165326B1 publication Critical patent/EP0165326B1/en
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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 for weaving machines, in particular rapier projectile weaving machines, with an outlet opening for guide teeth having the weft thread.
  • the known projectile guiding devices (CH-PS 465 521; CH-PS 315 854) 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 cross at a lower level, i.e. 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.
  • the invention has for its object to provide a guide device of the type defined in the introduction, with which streaking in the tissue is avoided. This task is achieved according to the invention by the features specified in the characterizing part of claim 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 designated 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 Side 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 5 is significantly larger than the outlet opening 12 of a known tooth, which is indicated by a dash-dotted line ben and the ends approach so close that only a small outlet opening remains.
  • the large outlet opening for the weft thread allows the weft thread to emerge unhindered when the guide device for striking the weft thread dips downward while simultaneously closing the shed.
  • the enlarged weft thread exit opening i.e.
  • FIG. 2 A guide device 15 consists of a number of guide supports 16 and guide hooks 17 which are cast in a block 18. The supports 16 and hooks 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.

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

Abstract

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 =< 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).

Description

Die Erfindung betrifft eine Führungsvorrichtung für Schussfadeneintragsorgane für Webmaschinen, insbesondere Greiferprojektil-Webmaschinen, mit eine Austrittsöffnung für den Schussfaden aufweisenden Führungszähnen.The invention relates to a guide device for weft insertion elements for weaving machines, in particular rapier projectile weaving machines, with an outlet opening for guide teeth having the weft thread.

Die bekannten Projektilführungsvorrichtungen (CH-PS 465 521; CH-PS 315 854) 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 in Erscheinung beim sogenannten "im-Sack-weben", weil dann die oberen und die unteren Kettfäden auf einem tieferen Niveau kreuzen, d.h. unterhalb der normalen.Webebene. Der Schussfaden streift dann hart an der oberen Innenkante des Führungszahnes entlang, was zu einer unerwünschten Streifenbildung im Gewebe führt.The known projectile guiding devices (CH-PS 465 521; CH-PS 315 854) 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 cross at a lower level, i.e. 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.

Der Erfindung liegt die Aufgabe zugrunde eine Führungsvorrichtung der eingangs definierten Art zu schaffen womit Streifenbildung im Gewebe vermieden wird. Diese Aufgabe wird erfindungsgemäss durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst.The invention has for its object to provide a guide device of the type defined in the introduction, with which streaking in the tissue is avoided. This task is achieved according to the invention by the features specified in the characterizing part of claim 1.

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

  • Fig. 1 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:
  • Figure 1 is a side view of a projectile guiding device according to the invention with whole guide teeth.
  • Fig. 2 is 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 mitgeführten 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 5 bedeutend grösser ist als die Austrittsöffnung 12 eines bekannten Zahnes, der mit strichpunktierter Linie angegeben ist und dessen Enden sich so dicht nähern, dass nur eine kleine Austrittsöffnung verbleibt. Durch die g'rosse Austrittsöffnung für den Schussfaden kann dieser, wenn die Führungsvorrichtung zum Anschlagen des Schussfadens nach unten wegtaucht bei gleichzeitigem Schliessen des Webfaches, unbehindert austreten. Die vergrösserte Schussfadenaustrittsöffnung, 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 anderseits 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 regelmässieres 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 Vibrillen 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 designated 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 Side 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 5 is significantly larger than the outlet opening 12 of a known tooth, which is indicated by a dash-dotted line ben and the ends approach so close that only a small outlet opening remains. The large outlet opening for the weft thread allows the weft thread to emerge unhindered when the guide device for striking the weft thread dips downward while simultaneously closing the shed. The enlarged weft thread exit opening, i.e. the shortening of the particular upper beak part of the guide tooth, continues to have a positive effect in connection with 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 earlier separation from the chain, the warp threads a longer time remains to resume their divisional position after the previous repression. 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 guiding teeth often dip between the individual vibrils of a thread, which has previously undesirably affected the fabric image.

Bevorzugte Abmessungen für die Austrittsöffnung 5 in Bezug auf das Projektil 7 wenn sich dieses innerhalb des Führungskanals 6 befindet, ergeben sich, wenn die Bedingungen:

Figure imgb0001
erfüllt sind, worin:

  • x der horizontale Abstand zwischen der vertikalen Zenterlinie des Projektilquerschnittes und dem Ende des Führungshakens 3" des Führungszahnes 3;
  • b die halbe Projektilbreite;
  • 1 der horizontale Abstand zwischen dem Mittelpunkt M des Projektilquerschnittes und dem freien Ende der Führungsstütze 3';
  • y der vertikale Abstand zwischen dem freien Ende der Führungsstütze 3' und der horizontalen Innenkante 3"' des Führungshakens 3";
  • d der vertikale Abstand zwischen der horizontalen Innenkante 3"' des Führungshakens 3" und der horizontalen Zenterlinie des Projektilquerschnittes.
Preferred dimensions for the outlet opening 5 with respect to the projectile 7 when it is located within the guide channel 6 result if the conditions:
Figure imgb0001
 are fulfilled, in which:
  • x the horizontal distance between the vertical center line of the projectile cross-section and the end of the guide hook 3 "of the guide tooth 3;
  • b half the projectile width;
  • 1 the horizontal distance between the center point M of the projectile cross section and the free end of the guide support 3 ';
  • y the vertical distance between the free end of the guide support 3 'and the horizontal inner edge 3 "' of the guide hook 3";
  • d the vertical distance between the horizontal inner edge 3 "'of the guide hook 3" and the horizontal center line of the projectile cross-section.

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. 2 gezeigt. Eine Führungsvorrichtung 15 besteht aus einer Anzahl Führungsstützen 16 und Führungshaken 17, die in einem Block 18 eingegossen sind. Die Stützen 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 sie 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. 2. A guide device 15 consists of a number of guide supports 16 and guide hooks 17 which are cast in a block 18. The supports 16 and hooks 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 (1)

1. Projektilführungsvorrichtung für Schussfadeneintragsorgane für Webmaschinen, insbesondere Greiferprojektil- ,Webmaschinen, mit eine Austrittsöffnung für den Schussfaden aufweisenden Führungszähnen, dadurch gekenn- zeichnet, dass die Austrittsöffnung (5) in Bezug auf das Projektil (7) folgenden Bedingungen unterliegt:
Figure imgb0002
mit: x der horizontale Abstand zwischen der vertikalen Zenterlinie des Projektilquerschnittes und dem Ende des Führungshakens (3"; 17) des Führungszahnes (3; 19); b die halbe Projektilbreite; 1 der horizontale Abstand zwischen dem Mittelpunkt M des Projektilquerschnittes und dem freien Ende der Führungsstütze (3'; 16); y der vertikale Abstand zwischen dem freien Ende der Führungsstütze (3'; 16) und der horizontalen Innenkante (3"') des Führungshakens (3"; 17); d der vertikale Abstand zwischen der horizontalen Innenkante (3"') des Führungshakens (3"; 17) und der horizontalen Zenterlinie des Projektilquerschnittes. 1. Projectile guiding device for weft insertion elements for weaving machines, in particular rapier projectile, weaving machines, with guide teeth having an exit opening for the weft thread, characterized in that the exit opening (5) is subject to the following conditions with respect to the projectile (7):
Figure imgb0002
 With: x the horizontal distance between the vertical center line of the projectile cross-section and the end of the guide hook (3 "; 17) of the guide tooth (3; 19); b half the projectile width; 1 the horizontal distance between the center point M of the projectile cross-section and the free end of the guide support (3 ';16); y the vertical distance between the free end of the guide support (3 '; 16) and the horizontal inner edge (3 "') of the guide hook (3";17); d the vertical distance between the horizontal inner edge (3 "') of the guide hook (3"; 17) and the horizontal center line of the projectile cross-section.
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
EP19840107017 EP0165326B1 (en) 1984-06-19 1984-06-19 Guideway for the weft inserter of a loom, especially for a dummy shuttle loom
DE8484107017T DE3473619D1 (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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EP19840107017 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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EP0165326A1 true EP0165326A1 (en) 1985-12-27
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669513A (en) * 1985-05-03 1987-06-02 Sulzer Brothers Limited Guide for a picking element in a weaving machine
EP0402285A1 (en) * 1989-06-09 1990-12-12 S.A. Saurer Diederichs Supporting and guiding device for mechanical weft inserters in shuttleless looms
WO2005031054A1 (en) * 2003-09-23 2005-04-07 Picanol N.V. Guiding element for a gripper strip

Citations (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

Patent Citations (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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669513A (en) * 1985-05-03 1987-06-02 Sulzer Brothers Limited Guide for a picking element in a weaving machine
EP0402285A1 (en) * 1989-06-09 1990-12-12 S.A. Saurer Diederichs Supporting and guiding device for mechanical weft inserters in shuttleless looms
FR2648161A1 (en) * 1989-06-09 1990-12-14 Saurer Diederichs Sa SUPPORT AND GUIDANCE DEVICE FOR WEFT MECHANICAL INSERTION DEVICES IN A NON-SHUTTLE WEAVING MACHINE
WO2005031054A1 (en) * 2003-09-23 2005-04-07 Picanol N.V. Guiding element for a gripper strip

Also Published As

Publication number Publication date
EP0165326B1 (en) 1988-08-24
DE3473619D1 (en) 1988-09-29

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