EP0198148A2 - Shuttle insertion device for a loom - Google Patents

Shuttle insertion device for a loom Download PDF

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Publication number
EP0198148A2
EP0198148A2 EP19860100004 EP86100004A EP0198148A2 EP 0198148 A2 EP0198148 A2 EP 0198148A2 EP 19860100004 EP19860100004 EP 19860100004 EP 86100004 A EP86100004 A EP 86100004A EP 0198148 A2 EP0198148 A2 EP 0198148A2
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EP
European Patent Office
Prior art keywords
crank
shuttle
rifle
picker stick
shaft wheel
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
EP19860100004
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German (de)
French (fr)
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EP0198148A3 (en
EP0198148B1 (en
Inventor
Albert Müller-Haas
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MUELLER-HAAS, ALBERT
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Individual
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Publication of EP0198148A3 publication Critical patent/EP0198148A3/en
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Publication of EP0198148B1 publication Critical patent/EP0198148B1/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/24—Mechanisms for inserting shuttle in shed
    • D03D49/26—Picking mechanisms, e.g. for propelling gripper shuttles or dummy shuttles

Definitions

  • the invention relates to a device for shooting weft handling on a mechanical loom.
  • the weaving machine drive shown in FIGS. 1 and 2 is arranged, for example, on the right loom side.
  • a striking roller f is attached to a rotating sub-shaft wheel h of the weaving machine.
  • D denotes a striking arm, to which a run-up curve piece e is connected.
  • An articulated linkage formed from a crank a and a connecting rod b is articulated on a rifle club i.
  • On the crank a is a segment of a segment c attached over which an inelastic, flexible traction device g, for example a steel wire rope, is placed.
  • the traction means g is attached at one end to the circular segment-like part c with a traction means holding block k and at its other end to the striking arm d with a traction means holding block 1.
  • the marksman i is connected at its lower end to a roller shoe m, the radius of curvature of which is in the center of the point of contact of the marksman with the picker, e.g. can be approximately 800 mm.
  • the roller skate m is prevented from evading horizontally by means of two locking levers n.
  • the levers n are fixed in place on a support m1, but are rotatably mounted and, on the other hand, are movably coupled to the one end n1 of the rolling shoe m.
  • the rolling shoe m is controlled somewhat outwards by the circular movement at the beginning of the striking movement - to the right in FIG. 1, whereby the deviation of the acceleration, see the dashed curve in FIG. 3, is largely canceled out compared to the solid curve with constant acceleration force.
  • crank a in FIG. 1 is pulled back into its initial position by a return spring q and at the same time is held in the extended position with the connecting rod b by a hold-down belt r.
  • the racket i is stopped by a racket not shown.
  • a buffer t for example made of wood, limits the movement of the beater arm d which in turn is connected to the weaving machine frame with a tab u.
  • S denotes a limiting device which limits the retraction movement of the striking arm d to the starting position.
  • the return movement of the striking arm d takes over a tension spring wr articulated on the striking arm d at point w1.
  • FIG. 3 shows the movement sequence for a uniform crank movement shown in FIG. 4 of a linkage composed of a crank a and a connecting rod b with the uniformly accelerated movement of the rifle club i derived therefrom along the line A-E.
  • the dashed curve shows the rifle shot acceleration with uniform movement and the solid curve shows the rifle shot acceleration with constant acceleration force.
  • the rifle shot acceleration achievable with the described shooter drive can largely be approximated to the ideal, extended acceleration curve.
  • Fig. 5 shows the energy expenditure in the described shooter drive (dashed area) and in a shooter drive with a force suddenly to be applied. In the latter case, this force BK is to be applied over the entire stroke SW, while with the described shooter drive a larger final force KK can be achieved with less energy consumption.
  • the vertical KK corresponds to the effective force increase at 45 degrees crank rotation, see FIG. 4.
  • the KK is 1.4 times the BK, with a 1.4 times the shooter speed, which results in an increase in weaving performance Has.
  • the force ratios can be influenced by the choice of the length ratio between the crank a and the connecting rod b and by the way in which the crank a is actuated and in which lever length it is attacked.

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

Abstract

A rotating shaft wheel assumes the function of a rotating power source for the throw of a shuttle. The transmission of this drive energy on to a springless shuttle beater (i) takes place by means of a striker roll, a lifting flank (e) connected adjustably to a springless picker stick (d), an unelastic and flexible traction means (g) in the form of a steel rope, and a hinged rod made of a crank (a) and a piston rod (b) of a similar length. The lifting flank is proportioned appropriately to transmit an even movement of rotation on to the picker stick. The crank is equipped with a part resembling a circular segment (c) with a radius equal to the crank length. The section passes on in a circular form the movement taken over by the picker stick on to the crank for effecting the shuttle throw.

Description

Die Erfindung betrifft eine Einrichtung zur Schützenschussabfertigung an einer mechani schen Webmaschine.The invention relates to a device for shooting weft handling on a mechanical loom.

Zur Schützenschussabfertigung bei mechanischen Webmaschinen sind verschiedene Lösungen bekannt. Bei einer bekannten mechanischen Webmaschine (CH-A-580 696) ist es bekannt, eine zwangsläufig beschleunigte Schützenschussabfertigung durch einen elektro-magnetischen Schützenantrieb zu erreichen. Dieser betätigt ein Kurbel-Pleuel-Gelenkgestänge, durch welches dem Schützenschläger eine beschleunigte Bewegung erteilt wird. Dieser ungefederte Webschützenantrieb erfüllt im wesentlichen die Erwartungen, jedoch hat sich in der Praxis gezeigt, dass seine Anwendbarkeit begrenzt ist. Dies deshalb, weil der für den Schützenantrieb verwendete Elektromagnet schnell aufeinander folgenden Schusseintragungen nicht zu folgen vermag.Various solutions are known for shooting weft handling in mechanical weaving machines. In a known mechanical weaving machine (CH-A-580 696) it is known to achieve an inevitably accelerated shooter weft handling by means of an electromagnetic shooter drive. This actuates a crank-connecting rod linkage, through which the rifle club is given an accelerated movement. This unsprung weaver drive essentially meets expectations, but practice has shown that its applicability is limited. This is because the electromagnet used for the shooter drive is not able to follow shot entries in quick succession.

Es ist deshalb Aufgabe der Erfindung, den bekannten Webschützenantrieb in seiner Anwendbarkeit zu erweitern, wobei aber seine ungefederte, zwangsläufige Beschleunigung optimal einhaltbar bleibt.It is therefore an object of the invention to expand the known weaving machine drive in its applicability, but its unsprung, inevitable acceleration remains optimally observable.

Diese Aufgabe wird gemäss der Erfindung durch die kennzeichnenden Merkmale des Patentanspruches erreicht.This object is achieved according to the invention by the characterizing features of the patent claim.

Die Erfidung ist in der Zeichnung in einem Ausführungsbeispiel dargestellt und wird nachfolgend beschrieben. Es zeigen:

  • Fig. 1 eine Seitenansicht eines erfindungsgemässen Webschützenantriebes,
  • Fig. 2 eine Seitenansicht der Kraftquelle und die Uebertragungsglieder zur Uebertragung der Kraft auf den Webschützenantrieb nach Fig. 1,
  • Fig. 3 ein Diagramm mit zwei Kurven, welche die Schützenschussbeschleunigung über der Bewegung der Kurbel des Webschützenantriebes zeigt,
  • Fig. 4 eine schematische Darstellung der Erzeugung der Schützenschussbeschleunigung und
  • Fig. 5 einen schematischen Vergleich der Krafteinsparung zwischen einem Webschützenantrieb mit einer kontinuierlich zunehmenden Kraft und einem Webschützenantrieb mit einer plötzlich aufzuwendenden Kraft.
The invention is shown in the drawing in an exemplary embodiment and is described below. Show it:
  • 1 is a side view of a shuttle shooter drive according to the invention,
  • FIG. 2 shows a side view of the power source and the transmission elements for transmitting the force to the shooter drive according to FIG. 1,
  • 3 shows a diagram with two curves, which shows the rifle shot acceleration over the movement of the crank of the rifle drive,
  • Fig. 4 is a schematic representation of the generation of the rifle shot acceleration and
  • Fig. 5 is a schematic comparison of the power saving between a shooter drive with a continuously increasing force and a shooter drive with a force suddenly to be applied.

Der in Fig. 1 und 2 dargestellte Webschützenantrieb ist beispielsweise auf der rechten Webmaschinenseite angeordnet. An einem rotierenden Unterwellenrad h der Webmaschine ist eine Schlagrolle f befestigt. Mit d ist eine Schlagarm bezeichnet, mit welchem ein Auflaufkurvenstück e verbunden ist.The weaving machine drive shown in FIGS. 1 and 2 is arranged, for example, on the right loom side. A striking roller f is attached to a rotating sub-shaft wheel h of the weaving machine. D denotes a striking arm, to which a run-up curve piece e is connected.

An einem Schützenschläger i ist ein aus einer Kurbel a und einem Pleuel b gebildetes Gelenkgestänge angelenkt. An der Kurbel a ist ein kreissegmentartiger Teil c befestigt, über den sich ein unelastisches, flexibles Zugmittel g, z.B. ein Stahldrahtseil, legt. Das Zugmittel g ist an seinem einen Ende mit einem Zugmittel-Haltekloben k am kreissegmentartigen Teil c und an seinem anderen Ende mit einem Zugmittel Haltekloben 1 am Schlagarm d befestigt.. __An articulated linkage formed from a crank a and a connecting rod b is articulated on a rifle club i. On the crank a is a segment of a segment c attached over which an inelastic, flexible traction device g, for example a steel wire rope, is placed. The traction means g is attached at one end to the circular segment-like part c with a traction means holding block k and at its other end to the striking arm d with a traction means holding block 1.

Mit x und y sind Gelenke des Gelenkgestänges a, b bezeichnet.With x and y joints of the linkage a, b are designated.

Der Schützenschläger i ist an seinem unteren Ende mit einem Abrollschuh m verbunden, dessen Krümmungsradius im Zentrum des Berührungspunktes des Schützen mit dem Picker, z.B. zirka 800 mm betragen kann. Der Abrollschuh m wird mittels zweier Sperrhebel n an einem horizontalen Ausweichen gehindert. Einerseits sind die Hebel n an einem Support m1 ortsfest, jedoch drehbar gelagert und andererseits mit dem dem einen Ende n1 des Abrollschuhs m beweglich gekuppelt.The marksman i is connected at its lower end to a roller shoe m, the radius of curvature of which is in the center of the point of contact of the marksman with the picker, e.g. can be approximately 800 mm. The roller skate m is prevented from evading horizontally by means of two locking levers n. On the one hand, the levers n are fixed in place on a support m1, but are rotatably mounted and, on the other hand, are movably coupled to the one end n1 of the rolling shoe m.

Wird nun die Lagerstelle der Sperrhebel n am Support m1 gegenüber der in Ausgangsstellung sich befindenden Kopplungsstelle n1 am Abrollschuh m entsprechend höher gesetzt, wird der Abrollschuh m durch die kreisende Bewegung am Anfang der Schlagbewegung etwas nach aussen - in Fig. 1 nach rechts - gesteuert, wodurch die Abweichung der Beschleunigung, siehe die gestrichelte Kurve in Fig. 3, gegenüber der ausgezogenen Kurve mit konstanter Beschleunigungskraft weitgehend aufgehoben wird.If the bearing point of the locking lever n on the support m1 is set correspondingly higher than the coupling point n1 on the rolling shoe m, which is in the starting position, the rolling shoe m is controlled somewhat outwards by the circular movement at the beginning of the striking movement - to the right in FIG. 1, whereby the deviation of the acceleration, see the dashed curve in FIG. 3, is largely canceled out compared to the solid curve with constant acceleration force.

Die Kurbel a in Fig. 1 wird durch eine Rückzugfederung q jeweils wieder in ihre Ausgangslage zurückgezogen und zugleich durch einen Niederhalteriemen r in der ausgestreckten Lage mit dem Pleuel b gehalten.The crank a in FIG. 1 is pulled back into its initial position by a return spring q and at the same time is held in the extended position with the connecting rod b by a hold-down belt r.

Der Schläger i wird durch eine nicht dargestellte Schlägeraufhaltung aufgehalten. Die Bewegungsbegrenzung des Schlagarmes d übernimmt ein Puffer t, z.B. aus Holz, der seinerseits mit einer Lasche u mit dem Webmaschinengestell verbunden ist. Mit s ist eine Begrenzungsvorrichtung bezeichnet, welche die Rückzugbewegung des Schlagarmes d in die Ausgangslage begrenzt.The racket i is stopped by a racket not shown. A buffer t, for example made of wood, limits the movement of the beater arm d which in turn is connected to the weaving machine frame with a tab u. S denotes a limiting device which limits the retraction movement of the striking arm d to the starting position.

Die Rückzugbewegung des Schlagarmes d übernimmt eine Zugfeder wrdie am Schlagarm d beim Punkt w1 angelenkt ist.The return movement of the striking arm d takes over a tension spring wr articulated on the striking arm d at point w1.

Fig. 3 zeigt den Bewegungsablauf für eine in Fig. 4 dargestellte gleichförmige Kurbelbewegung eines Gestänges aus einer Kurbel a und einem Pleuel b mit der daraus abgeleiteten gleichförmig beschleunigten Bewegung des Schützenschlägers i längs der Linie A-E. Die gestrichelte Kurve zeigt die Schützenschussbeschleunigung bei gleichförmiger Bewegung und die ausgezogene Kurve die Schützenschussbeschleunigung mit konstanter Beschleunigungskraft. Die mit dem beschriebenen Webschützenantrieb erreichbare Schützenschussbeschleunigung kann weitgehend der idealen, ausgezogenen Beschleunigungskurve angenähert werden.FIG. 3 shows the movement sequence for a uniform crank movement shown in FIG. 4 of a linkage composed of a crank a and a connecting rod b with the uniformly accelerated movement of the rifle club i derived therefrom along the line A-E. The dashed curve shows the rifle shot acceleration with uniform movement and the solid curve shows the rifle shot acceleration with constant acceleration force. The rifle shot acceleration achievable with the described shooter drive can largely be approximated to the ideal, extended acceleration curve.

Fig. 5 zeigt den Energieaufwand beim beschriebenen Webschützenantrieb (gestrichelte Fläche) und bei einem Webschützenantrieb mit einer plötzlich aufzuwendenden Kraft. In letzterem Fall ist diese Kraft BK über den ganzen Schlagweg SW aufzubringen, während beim beschriebenen Webschützenantrieb eine grössere Endkraft KK bei geringerem Energieaufwand erreicht werden kann.Fig. 5 shows the energy expenditure in the described shooter drive (dashed area) and in a shooter drive with a force suddenly to be applied. In the latter case, this force BK is to be applied over the entire stroke SW, while with the described shooter drive a larger final force KK can be achieved with less energy consumption.

Die Senkrechte KK entspricht dem effektiven Kraftanstieg bei 45 Grad Kurbeldrehung, siehe Fig. 4. Gegenüber der Senkrechten BK beträgt KK das 1,4-fache von BK, wobei eine 1,4-fache Schützengeschwindigkeit erreicht wird, was eine Steigerung der Webleistung zur Folge hat.The vertical KK corresponds to the effective force increase at 45 degrees crank rotation, see FIG. 4. Compared to the vertical BK, the KK is 1.4 times the BK, with a 1.4 times the shooter speed, which results in an increase in weaving performance Has.

Das kontinuierliche, von Null in A bis Z erfolgende Ansteigen des Kraftaufwandes ist eine Folge des rechtwinklig zur Schussrichtung verlaufenden Antriebskraft in gestrichelter Pfeilrichtung des Schlagarmes d, siehe Fig. 2, und der dadurch erreichten Aufteilung des Schlagkraftaufwandes in Seitenkräfte.The continuous increase from zero to AZ of the effort is a consequence of the driving force running at right angles to the firing direction in the dashed arrow direction of the striking arm d, see FIG. 2, and the division of the striking force into lateral forces thereby achieved.

Witterung- z.B. Luftfeuchtigkeitsänderungen.können dem beschriebenen ungefederten Webschützenschlag nicht beeinflussen. Durch Wahl des Längenverhältnisses zwischen der Kurbel a und dem Pleuel b und durch die Art, wie die Kurbel a betätigt und in welcher Hebellänge sie angegriffen wird, können die Kraftverhältnisse beeinflusst werden.Weather - e.g. Humidity changes cannot influence the unsprung weaver stroke described. The force ratios can be influenced by the choice of the length ratio between the crank a and the connecting rod b and by the way in which the crank a is actuated and in which lever length it is attacked.

Claims (1)

Einrichtung für die Schützenschussabfertigung an einer mechanischen Webmaschine, dadurch gekennzeichnet, dass ein rotierendes Unterwellenrad (h) die Funktion einer umlaufenden Kraftquelle zur Schützenabschussfertigung übernimmt, dass die Uebertragung dieser Antriebsenergie auf einen federfreien Schützenschläger (i) mittels einer am Unterwellenrad befestigten Schlagrolle (f), einem von letzterer zu überrollenden, mit einem ungefederten Schlagarm (d) verstellbar vereinten Auflaufkurvenstück (e), einem unelastischen, flexiblen Zugmittel (g) (Stahldrahtseil) und einem aus einer Kurbel (a) und einem Pleuel (b) gleicher Länge zusammengesetzten Gelenkqestänqe erfolgt, dass das Auflaufkurvenstück (e) eine zur Uebermittlung einer gleichförmigen Drehbewegung an den Schlagarm (d) geeignete Formgebung aufweist und dass die Kurbel (a) mit einem kreissegmentartigen Teil (c) mit einem Radius gleich der Kurbellänge versehen ist, zwecks kreisbewegender Weitergabe der vom Schlagarm (d) übernommenen Bewegung durch das mit einem beweglichen Haltekloben (1) fest verbundene Zugmittel (g) an die Kurbel (a) für die Ausführung des Schützenschusses.Device for the shooting of weft on a mechanical weaving machine, characterized in that a rotating sub-shaft wheel (h) takes over the function of a rotating power source for the production of the shooter, that the transmission of this drive energy to a spring-free rifle racket (i) by means of a striker roller (f) attached to the sub-shaft wheel. an overrun cam piece (e) to be rolled over by the latter, adjustable with an unsprung impact arm (d), an inelastic, flexible traction means (g) (steel wire rope) and an articulated joint composed of a crank (a) and a connecting rod (b) of the same length that the run-up curve piece (e) has a shape suitable for transmitting a uniform rotary movement to the striking arm (d) and that the crank (a) is provided with a segment-like part (c) with a radius equal to the crank length, for the purpose of circulating transmission of the Impact arm (d) supply by means of the traction means (g) firmly connected to the crank (a) with a movable holding block (1) for the execution of the rifle shot.
EP19860100004 1985-04-13 1986-01-02 Shuttle insertion device for a loom Expired - Lifetime EP0198148B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1565/85 1985-04-13
CH156585A CH679048A5 (en) 1985-04-13 1985-04-13 Shuttle throw prodn. mechanism for mechanical looms

Publications (3)

Publication Number Publication Date
EP0198148A2 true EP0198148A2 (en) 1986-10-22
EP0198148A3 EP0198148A3 (en) 1988-08-31
EP0198148B1 EP0198148B1 (en) 1992-02-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860100004 Expired - Lifetime EP0198148B1 (en) 1985-04-13 1986-01-02 Shuttle insertion device for a loom

Country Status (3)

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EP (1) EP0198148B1 (en)
CH (1) CH679048A5 (en)
DE (1) DE3683788D1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT74443B (en) * 1915-10-19 1918-07-25 Webstuhl & Webereimaschinen Fa Beating device for looms.
GB226341A (en) * 1923-11-12 1924-12-24 Vincent Cass Improvements in picking motions for looms for weaving
CH580696A5 (en) * 1974-02-28 1976-10-15 Mueller Haas Albert Mechanical loom, moving centre section of sley only - together with electromagnetically operated picking, greatly reduces wear

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT74443B (en) * 1915-10-19 1918-07-25 Webstuhl & Webereimaschinen Fa Beating device for looms.
GB226341A (en) * 1923-11-12 1924-12-24 Vincent Cass Improvements in picking motions for looms for weaving
CH580696A5 (en) * 1974-02-28 1976-10-15 Mueller Haas Albert Mechanical loom, moving centre section of sley only - together with electromagnetically operated picking, greatly reduces wear

Also Published As

Publication number Publication date
EP0198148A3 (en) 1988-08-31
CH679048A5 (en) 1991-12-13
EP0198148B1 (en) 1992-02-05
DE3683788D1 (en) 1992-03-19

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