EP0101492B1 - Weft yarn insertion channel - Google Patents

Weft yarn insertion channel Download PDF

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Publication number
EP0101492B1
EP0101492B1 EP83900797A EP83900797A EP0101492B1 EP 0101492 B1 EP0101492 B1 EP 0101492B1 EP 83900797 A EP83900797 A EP 83900797A EP 83900797 A EP83900797 A EP 83900797A EP 0101492 B1 EP0101492 B1 EP 0101492B1
Authority
EP
European Patent Office
Prior art keywords
weft yarn
weft
teeth
mouth
guide
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
EP83900797A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0101492A1 (en
Inventor
John Dalton Bonas Machine Comp. Ltd. 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 EP0101492A1 publication Critical patent/EP0101492A1/en
Application granted granted Critical
Publication of EP0101492B1 publication Critical patent/EP0101492B1/en
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
    • D03D47/3053—Arrangements or lay out of air supply systems
    • 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
    • D03D47/3033—Controlling the air supply
    • D03D47/304—Controlling of the air supply to the auxiliary nozzles

Definitions

  • the present invention relates to a weft yarn insertion channel for use in a fluid jet weaving loom.
  • the guide teeth have to perform two main functions viz., (1) they have to guide the air flow along the channel so as to carry the weft yarn therealong without it jumping out of the channel and (2) they have to permit easy exit of the inserted weft yarn on beat-up in the weaving cycle.
  • U.S. Patent 3742973 and French Patent 2370811 both provide guide teeth having continuously bounded insertion openings wherein the exit mouth is covered by a resilient lip.
  • a main disadvantage with such a construction is difficulty of manufacture due to the provision of the resilient tip.
  • French Patent 1452576 and U.K. Patent 2072719 provide alternative constructions of guide teeth for providing a weft insertion channel which during the insertion cycle provides a continuously bounded channel and which on beat up define exit mouth openings through which the weft yarn can escape.
  • a guide tooth for a weft insertion channel the guide tooth in cross-section defining a continuously bounded opening for weft yarn insertion, the guide tooth including a weft yarn exit mouth which is closed during weft insertion and which permits the weft yarn to pass therethrough on beat-up
  • the guide tooth includes two arms which are joined together by a resilient connection which defines a hinged connection and are shaped to define said continuously bounded opening, the arms being movable about the hinged connection to open and close said exit mouth.
  • the guide tooth may be constructed so that the weft yarn opens the exit mouth during beat-up or may be constructed so that the mouth is opened after weft yarn insertion to provide a gap through which the yarn passes on beat-up.
  • each guide tooth is a one piece plastics moulding comprising a pair of arms which are hingedly connected together.
  • a weft yarn insertion channel comprising a plurality of guide teeth as defined above, the guide teeth being arranged in groups of teeth so that the channel is defined by a plurality of side by side groups of said teeth, the teeth in each group being connected so as to move in unison for opening/closing of the weft yarn exit mouth.
  • the groups of teeth are arranged so that the weft yarn exit mouths are normally open, actuation means being provided to act on successive groups to close the weft yarn exit mouths of teeth in each group as the leading end of the weft yarn passes therethrough during insertion.
  • the weft insertion channel 10 is composed of individual guide teeth 11 secured to the base of the reed 12 so as to be in front of the reed. Each tooth 11 is arranged in abutting relationship with a neighbouring tooth so that collectively they form a channel extending across the warp sheet. Each tooth 11 is preferably formed in one piece from a plastics material and is conveniently injection moulded. Each tooth 11 has a pair of arms 14, 15 which are connected via a web 16. The web 16 provides a flexible connection between arms 14, 15 so as to define a hinge. The upper portions 14a, 15a of arms 14 and 15 are shaped so as to define together with web 16 an opening 18 through which compressed air is directed for carrying weft yarn across the warp shed.
  • the upper portions 14a, 15a have terminal end faces 14b, 15b respectively which abut against one another but which on separation define a gap therebetween through which the weft yarn can exit during beat-up.
  • the arms 14, 15 have lower portions 14c, 15c respectively which extend downwardly below web 16.
  • Lower portions 14c and 15c each have a widened portion 14d, 15d respectively which abut against similar portions on neighbouring teeth and thereby serve to space the upper portions of the teeth from one another.
  • each portion 14d, 15d has projections and recesses for co-operation with recesses and projections on the neighbouring tooth so as to accurately position individual teeth relative to one another. Portions 14d are clamped to the base of reed 12 and portions 15d are freely mounted.
  • portions 15d interact with one another they move in unison and restrain lateral twisting movements between arms 14, 15 of individual teeth.
  • portions 14d, 15d are provided with apertures 14e, 15e through which stiff rods e.g. made of steel pass in order to secure adjacent teeth together.
  • teeth 11 are arranged in groups 25 so that all arms 15 of teeth 11 in one group move in unison independently of the arms 15 of teeth 11 in other groups. Accordingly the portions 15d of terminal teeth in each group slidingly abut the neighbouring portion 15d ofthe teeth in the neighbouring group.
  • the terminal end faces 14b, 15b are normally spaced apart and so biasing means 26 are provided to operate on each group 25 to bias faces 14b, 15b into contact.
  • the biasing means may be arranged to provide a permanent bias which is sufficient to overcome the inherent bias in web 16 and so maintain faces 14b, 15b in contact but which permit the weft yarn to part the faces 14b, 15b to exit from the teeth on beat-up.
  • 15b inclined faces may be provided to create a lead-in for the weft yarn.
  • the biasing means 26' may be arranged to provide a variation in the biasing force dependent on the cycle of the weaving loom.
  • the biasing means 26' may be arranged to provide a greater bias during weft insertion and a smaller predetermined bias during beat-up, the smaller predetermined bias being such as to maintain contact between faces 14b, 15b but permit the weft yarn to part the faces 14b, 15b to exit from teeth 11.
  • the biasing means may be arranged to provide a biasing force during weft insertion only so that at other times the abutting faces 14b, 15b are allowed to part to provide an open mouth for exit of the inserted weft yarn.
  • the biasing means 26' for each group are mounted on a cam follower 40 which actuates auxiliary air nozzles associated with each group 25 of guide teeth.
  • cam followers 40 are actuated in succession from left to right in Figure 3to provide an auxiliary blast of airto carry the leading end of the weft yarn through a particular group 25 of teeth.
  • the cam follower 40 moves the biasing means 26'to move arms 15 to bring faces 14b, 15b into contact for that particular group of teeth.
  • cam follower 40 After the leading end oftheweftyarn has passed through the particular group the cam follower 40 is moved to close-off supply of air to that particular group and so simultaneously permits faces 14b and 15b to part. Accordingly, after weft insertion has been completed, faces 146,156 on all teeth are spaced apart ready for easy exit of the weft yarn during beat-up.
  • the biasing means 26' may be mounted on the reed shaft 50 for movement therewith so that when the reed shaft moves away from its beat-up position the biasing means 26' are operated to close the weft yarn exit gap in readiness for insertion of the weft yarn.
  • the biasing means 26' illustrated in Figure 7 basically comprises an elongate resilient member 60, preferably in the form of a leaf spring, which at one end co-operates with arms 15 of a respective group of teeth and co-operates at its other end with an adjustable stop 61 which is slidably mounted on the loom frame.
  • the member 60 is secured to the reed shaft 50 via a further resilient member 64.
  • Resilient member 64 is preferably also a leaf spring which is secured at one end to the reed shaft 50 and at the other end to resilient member 60.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP83900797A 1982-02-19 1983-02-16 Weft yarn insertion channel Expired EP0101492B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8204881 1982-02-19
GB8204881 1982-02-19

Publications (2)

Publication Number Publication Date
EP0101492A1 EP0101492A1 (en) 1984-02-29
EP0101492B1 true EP0101492B1 (en) 1986-05-28

Family

ID=10528445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83900797A Expired EP0101492B1 (en) 1982-02-19 1983-02-16 Weft yarn insertion channel

Country Status (5)

Country Link
EP (1) EP0101492B1 (ja)
JP (1) JPS59500226A (ja)
DE (1) DE3363652D1 (ja)
IT (1) IT1161008B (ja)
WO (1) WO1983002965A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104153102A (zh) * 2014-07-22 2014-11-19 扬中市金德纺织机械设备厂 毛巾织机打纬总成

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1452576A (fr) * 1965-10-15 1966-02-25 Sp K Bureau Proekt Tkatskogo O Dispositif de guidage de fil de trame dans la foule de chaîne de métiers de tissage pneumatiques
CH547368A (de) * 1972-02-08 1974-03-29 Vyzk Vyvojovy Ustav Vseobe Lamelle eines anschlag- und fuehrungskammes fuer eine pneumatische duesenwebmaschine.
JPS5361758A (en) * 1976-11-12 1978-06-02 Nissan Motor Guiding piece for air jet loom
CH645418A5 (de) * 1980-03-27 1984-09-28 Rueti Ag Maschf Einrichtung zur fuehrung eines mittels eines stroemenden fluidums angetriebenen schussfadens im webfach einer webmaschine.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104153102A (zh) * 2014-07-22 2014-11-19 扬中市金德纺织机械设备厂 毛巾织机打纬总成

Also Published As

Publication number Publication date
IT8319640A0 (it) 1983-02-17
EP0101492A1 (en) 1984-02-29
IT1161008B (it) 1987-03-11
DE3363652D1 (en) 1986-07-03
WO1983002965A1 (en) 1983-09-01
JPS59500226A (ja) 1984-02-16

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