EP0077787B1 - Webmaschine - Google Patents

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Publication number
EP0077787B1
EP0077787B1 EP19820901144 EP82901144A EP0077787B1 EP 0077787 B1 EP0077787 B1 EP 0077787B1 EP 19820901144 EP19820901144 EP 19820901144 EP 82901144 A EP82901144 A EP 82901144A EP 0077787 B1 EP0077787 B1 EP 0077787B1
Authority
EP
European Patent Office
Prior art keywords
channel
valve
weaving loom
air
loom according
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
EP19820901144
Other languages
English (en)
French (fr)
Other versions
EP0077787A1 (de
Inventor
John D. Bonas Machine Company Limited Griffith
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
Original Assignee
Gebrueder Sulzer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Publication of EP0077787A1 publication Critical patent/EP0077787A1/de
Application granted granted Critical
Publication of EP0077787B1 publication Critical patent/EP0077787B1/de
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—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
    • D03D47/306—Construction or details of parts, e.g. valves, ducts
    • 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
    • D03D47/3006—Construction of the nozzles
    • D03D47/302—Auxiliary nozzles
    • 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
    • D03D47/3053—Arrangements or lay out of air supply systems

Definitions

  • the invention is concerned with a loom including weft yarn guide which guides an air flow for directing a weft yarn across a warp sheet.
  • the weft yarn guide is usually mounted on the reed shaft and so during operation the auxiliary jets move in unison with the reed shaft. This creates the problems of providing a connection between the source of pressurised air and each auxiliary jet which is reliable and interferes as little as possible with the running of the loom.
  • auxiliary jets each group being supplied from a single source an air distributor.
  • the air distributor may be mounted on the loom frame as for instance disclosed in published U.K. Patent Application 2065727A or on the reed shaft as disclosed in published U.K. Patent Application 2027066A. In both of these types of construction it is necessary to provide a valve means to control each distributor and the valve means is mounted on the loom frame.
  • a fluid jet weaving loom comprising a reed shaft rotatably mounted in the loom frame for oscillatory rotary motion, a reed mounted on the reed shaft, a weft insertion channel mounted adjacent to the reed, jet nozzles spaced along the weft insertion channel for carrying the weft yarn along the channel during weft insertion, the jet nozzles being arranged in groups of nozzles spaced along the length of the channel, the nozzles of each group communicating with a source of pressurised fluid via a common valve means, characterised in that each valve means is mounted on and adjacent the reed shaft, each valve means including cam follower means which is movable mounted to actuate the valve means, and in that a cam shaft is rotatably mounted on the loom frame at a position so as to co-operate with the cam follower means during weft insertion.
  • FIGS 1 and 2 there is shown an air guide channel 10 for weft yarn insertion which extends across the warp sheet of a loom 12.
  • the channel 10 is composed of a plurality of individual guide teeth 13 which will be described hereinafter. Spaced along the channel 10 are auxiliary air jets 15 which are spaced apart by a desired number of guide teeth 13.
  • the guide teeth 13 and auxiliary jets 15 are mounted on the reed shaft 18 of the loom so as to be located in front of the beat-up reed 19.
  • the guide teeth 13 have a base portion 20 which is received in a rebate 21 formed in a support member 22 secured to the beat-up shaft 18.
  • Individual clamp plates 23 are provided along the support member 22 and each is secured thereto by a pair of bolts 25 so that individual clamp plates 23 may be removed to permit removal of blocks of guide teeth 13.
  • the guide teeth include a pair of arms 60, 61 which have internal edges defining the sides and upper confines of the channel. The lower confine of the channel is defined by the upper edge of the upper portion 20a and the base portion 20.
  • the lower portion 20b of the base portion is a greater thickness than the remainder of the tooth so that abutting lower portion 20b of adjacent teeth serve to space the respective arms 60, 61 of the adjacent teeth apart by a predetermined amount.
  • the lower portion 20b are provided with projections 20c on one side and complimentary recesses on the opposite side so that abutting teeth are maintained in correct alignment.
  • the teeth 13 are moulded in one piece from a suitable plastics material.
  • the auxiliary air jets 15 are arranged in groups along the length of the channel 10 wherein the air jets in each group are supplied with air from a common valve 30. Only one group and valve 30 are shown in Figure 2.
  • the valves 30 are operated sequentially by the cam shaft so that auxiliary jets are operated sequentially along the channel as the weft yarn end travels therealong.
  • the auxiliary jets are each mounted on a guide tooth having one arm removed to permit its inclusion.
  • the auxiliary jet is moulded with the tooth so that its position may be accurately attained.
  • Each cam follower 34 is in the form of a lever having a roller 35 at one end and an abutment face 36 at the other end for operating a plunger 37 in valve 30.
  • the lever is biased by a spring 34a so that the plunger 37 is normally depressed, in which position the plunger urges a ball 38 against a conical seat 39 surrounding an air inlet port 40 to a chamber 43 in which ball 38 is housed.
  • the air inlet port 40 communicates via a conduit 41 with a bore 18a within a shaft 18 which is supplied with compressed air.
  • the cam 31 operates cam follower 34 to move away from plunger 37 and accordingly air pressure at the inlet port 40 forces the ball 38 away from seat 39 and into contact with a conical seat 45 surrounding the bore housing plunger 37.
  • Air from conduit 41 enters chamber 43 and flows via exit ports 46 to auxiliary jets communicating therewith.
  • a shaft 50 having a plurality of radial arms 51 for cooperation with the cam followers 34 is provided.
  • the radial arms strike the cam-followers to deflect them away from their associated valve 30.
  • the guide teeth 13 each have two arms 60, 61 which have internal edges which define opposed sides and top of the channel 10.
  • the bottom of the channel 10 is defined by the upper edge of the base portion 20.
  • the arms 60, 61 have terminal ends spaced apart to define a mouth 63 through which weft yarn may escape from the channel during beat-up.
  • the auxiliary jets 15 are each provided with a nozzle 65 (see Figure 3) which is arranged to direct a flow of air toward an internal edge 70 of the guide tooth 13a adjacent to and downstream of the jet 15 so that a curtain of air 65a extends across the mouth 63 of tooth 13a to discourage exit of weft yarn through that mouth.
  • the internal edge against which the flow of air is directed is shaped so as to deflect the flow of air along the channel 10. At least one of the remaining internal edges is preferably shaped so as to encourage removal of air from the channel between adjacent teeth. In this way the weft yarn is encourage to move toward those edges.
  • the nozzle 65 directs a flow of air toward the lower part of the internal edge 70 defined by arm 60.
  • the edge 70 is inclined to the axis of the channel so that it progressively approaches the centre of the channel in the direction of travel of the weft yarn.
  • the angle of inclination between the edge 70 and longitudinal axis of the channel is about 10°.
  • Edge 10 may alternatively be rounded as shown in Figures 4d or 4e.
  • the flow of air is deflected by edge 70 towards internal edge 71 of arm 61.
  • This edge 71 can be shaped to encourage air loss between adjacent teeth so as to encourage the main flow of air whilst travelling toward the next auxiliary jet to remain close to edge 71.
  • edge 71 Examples of cross sectional edge shapes suitable for edge 71 are illustrated schematically in Figures 4a to 4f. Each of these edges is designed to cause a negative pressure immediately downstream of the tooth to cause turbulence and thus loss of air from channel 10.
  • the outer internal edges 72 and 73 may be shaped so as to encourage the desired air flow, for instance edge 72 may be inclined in a similar manner to edge 70 so that flow of air impinging on edge 72 is deflected downwardly toward edge 73 and edge 73 may be shaped in a similar manner to edge 71 so that air loss is achieved between adjacent teeth at the bottom of channel 10. Accordingly flow of air along channel 10 between adjacent auxiliary jets is in the main encouraged to flow near to the corner between edges 71 and 73 which urges the weft yarn to travel along the channel 10 at a location which is remote from the mouths 63 of adjacent teeth.
  • edges 70, 71, 72 and 73 are of different shape. They could all be of a shape which allows edge 70 to deflect the air from the nozzle, but which also allows sufficient air escape from all the edges to prevent a pressure build up inside the guides and consequent air escape from gap 63.

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

Claims (10)

1. Strömungsmittelstrahl-Webmaschine, umfassend eine im Webstuhlrahmen für schwingende Bewegung drehbar gelagerte Blattwelle (18), ein an der Blattwelle montiertes Blatt (19), einen neben dem Blatt montierten Schußfadeneinzug-Durchgang (10), (und) längs des Schußfadeneinzug-Durchgangs auf Abstände verteilte Strahldüsen (15), um den Schußfaden beim Schußfadeneinzug längs des Durchgangs mitzunehmen oder zu führen, wobei die Strahldüsen in über die Länge des Durchgangs auf Abstände verteilten Düsengruppen angeordnet sind und die Düsen jeder Gruppe über eine gemeinsame Ventileinrichtung (30) mit einer Druckmittelquelle kommunizieren, dadurch gekennzeichnet, daß jede Ventileinrichtung (30) an und neben der Blattwelle (18) montiert ist, daß jede Ventileinrichtung eine Kurvenfühlereinrichtung (34) aufweist, die zur Betätigung der Ventileinrichtung bewegbar gelagert ist, und daß eine Nocken- oder Kurvenwelle (12) am Webstuhlrahmen drehbar in einer Stellung gelagert ist, in welcher sie beim Schußfadeneinzug mit der Kurvenfühlereinrichtung zusammenwirkt.
2. Webmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Blattwelle eine innere (zentrale) Bohrung (18a) für die Zufuhr des Druckmittels zu jeder Ventileinrichtung aufweist.
3. Webmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Ventileinrichtung für jede Gruppe von Strahldüsen einen Ventilkörper mit einer Kammer (43) zur Aufnahme eines Ventilglieds (38), eine Einlaßöffnung (40) und mit der Kammer kommunizierende Auslaßöffnungen (46) sowie ein Vorbelastungsmittel (34a) zum Vorbelasten des Ventilglieds in Anlage gegen die Einlaßöffnung aufweist, wobei auf das Vorbelastungsmittel die Kurvenfühlereinrichtung einwirkt.
4. Webmaschine nach Anspruch 3, dadurch gekennzeichnet, daß das Ventilglied (38) sphärisch ausgebildet ist und die Einlaßöffnung mit einem konischen Sitz (39) versehen ist, gegen den sich das Ventilglied bei Vorbelastung durch das Vorbelastungsmittel anlegt.
5. Webmaschine nach Anspruch 4, dadurch gekennzeichnet, daß das Vorbelastungsmittel einen Stößel (39 bzw. 37) aufweist, der verschieblich in eine mit der Einlaßöffnung (40) fluchtende Bohrung eingesetzt ist, (und) die Kammer so geformt ist, daß bei der Betätigung des Vorbelastungsmittels durch die Kurvenfühlereinrichtung das Ventilglied den Stößel aus der Kammer herausbewegt, so daß das Ventilglied sich mit Dichtungsberührung an die Mündung der Bohrung anlegt.
6. Webmaschine nach Anspruch 5, dadurch gekennzeichnet, daß die Mündung der Bohrung mit einem konischen Sitz (45) für das Ventilglied versehen ist.
7. Webmaschine nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß sich der Stößel aus dem Körper des Ventils herauserstreckt und die Kurvenfühlereinrichtung (34) einen schwenkbar gelagerten Hebel aufweist, dessen eines Ende (36) zum Verschieben des Stößels gegen das Ventilglied vorbelastet ist, während das andere Ende des Hebels mit der Kurvenwelle (12) zusammenzuwirken vermag, welche bei ihrer Drehung den Hebel intermittierend auslenkt, um den Stößel sich aus dem Ventilkörper herausbewegen zu lassen.
8. Webmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Kurvenwelle zum sequentiellen Betätigen der Ventileinrichtungen aufeinanderfolgender Gruppen von Düsen angeordnet ist.
9. Webmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Schußfadeneinzug-Durchgang durch mehrere beabstandete Leitzähne festgelegt ist, die jeweils eine offene Mündung aufweisen, durch welche der Schußfaden beim Anschlagen entweichen kann, (und) jede Strahldüse so angeordnet ist, daß sie einen Luftstrom in den Durchgang richtet und damit einen Luftvorhang über die Mündung zumindest eines benachbarten Leitzahns bildet, um den Schußfaden an seinem Austritt durch die Mündung zu hindern.
10. Webmaschine nach Anspruch 9, dadurch gekennzeichnet, daß die benachbarten (Leit-)-Zähne eine innere Ablenkkante aufweisen, gegen welche die Strahldüsen den Luftstrom richten, wobei Richtung des Luftstroms von der (jeder) Strahldüse und Form der Ablenkkante so gewählt sind, daß der Luftstrom zur Strömung im wesentlichen axial längs des Durchgangs gerichtet wird.
EP19820901144 1981-05-02 1982-04-29 Webmaschine Expired EP0077787B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8113632 1981-05-02
GB8113632 1981-05-02

Publications (2)

Publication Number Publication Date
EP0077787A1 EP0077787A1 (de) 1983-05-04
EP0077787B1 true EP0077787B1 (de) 1985-11-13

Family

ID=10521573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820901144 Expired EP0077787B1 (de) 1981-05-02 1982-04-29 Webmaschine

Country Status (4)

Country Link
EP (1) EP0077787B1 (de)
JP (1) JPS58500618A (de)
DE (1) DE3267369D1 (de)
WO (1) WO1982003877A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0100542B1 (de) * 1982-08-04 1987-09-23 Nissan Motor Co., Ltd. Schussmechanismus für eine Düsenwebmaschine
BE903156A (nl) * 1985-08-30 1986-02-28 Picanol Nv Klepinrichting voor de bediening van op een lade bevestigde blazers bij weefmachines
DE29806552U1 (de) * 1998-04-09 1998-07-09 Dornier Gmbh Lindauer Schußfadeneintragsvorrichtung für eine Luftdüsenwebmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2432567A1 (fr) * 1978-08-01 1980-02-29 Saurer Diederichs Sa Relais actif pour machine a tisser sans navette a insertion de trame pneumatique
DE2836206B2 (de) * 1978-08-09 1981-03-26 Gebrueder Sulzer Ag, 8401 Winterthur Elektronische Steuereinrichtung für eine Webmaschine
CH643610A5 (de) * 1979-03-17 1984-06-15 Toyoda Automatic Loom Works Vorrichtung zur fuehrung eines schussfadens an einer duesenwebmaschine.
DE2938100C2 (de) * 1979-09-20 1982-09-30 Daimler-Benz Ag, 7000 Stuttgart Ventil
JPS5691038A (en) * 1979-12-26 1981-07-23 Nissan Motor Wefting method of air jet type loom
JPS5945773B2 (ja) * 1980-04-11 1984-11-08 日産自動車株式会社 空気噴射式織機の緯入れ装置

Also Published As

Publication number Publication date
JPS58500618A (ja) 1983-04-21
EP0077787A1 (de) 1983-05-04
DE3267369D1 (en) 1985-12-19
WO1982003877A1 (en) 1982-11-11

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