EP2808431B1 - Air jet loom part with weft yarn tension applying apparatus, air jet loom and method of using the air jet loom part - Google Patents

Air jet loom part with weft yarn tension applying apparatus, air jet loom and method of using the air jet loom part Download PDF

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Publication number
EP2808431B1
EP2808431B1 EP14169563.5A EP14169563A EP2808431B1 EP 2808431 B1 EP2808431 B1 EP 2808431B1 EP 14169563 A EP14169563 A EP 14169563A EP 2808431 B1 EP2808431 B1 EP 2808431B1
Authority
EP
European Patent Office
Prior art keywords
air supply
supply tube
jet loom
weft yarn
air
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.)
Not-in-force
Application number
EP14169563.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2808431A1 (en
Inventor
Akito Morita
Yoichi Makino
Masanobu Sakai
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.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
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 Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP2808431A1 publication Critical patent/EP2808431A1/en
Application granted granted Critical
Publication of EP2808431B1 publication Critical patent/EP2808431B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D03D47/3066—Control or handling of the weft at or after arrival
    • D03D47/308—Stretching or holding the weft

Definitions

  • the present invention relates to an air jet loom part, an air jet loom, and a method of using an air jet loom part.
  • Japanese Patent Application Publication JP 2000-170057 A discloses a weft yarn tension applying apparatus in an air jet loom.
  • the weft yarn tension applying apparatus includes a stretch nozzle that is fastened to the front surface of the slay of the air jet loom in such a manner that the stretch nozzle is adjustably positioned along weft insertion direction.
  • the injection port of the stretch nozzle is directed perpendicular to the passage for weft insertion so that air is injected by the stretch nozzle across the passage.
  • a weft yarn capturing tube is provided behind the reed of the air jet loom.
  • the weft yarn capturing tube is supported to the upper frame of the reed through a hooking member.
  • the weft yarn capturing tube includes an inlet opened in the direction across the arrangement of the dents, an air blowing tube part arranged parallel to the arrangement of the dents and opened in the downstream direction of weft insertion and a bent part between the inlet and the air blowing tube part.
  • An insertion projection is fixed to the inlet of the weft yarn capturing tube.
  • the weft yarn capturing tube is movable to make the insertion projection to be inserted into a space between any two adjacent dents thereby to expand the space, so that the inlet of the weft yarn capturing tube faces the expanded space.
  • the weft yarn capturing tube may be mounted to the reed at any position along the weft insertion direction.
  • the stretch nozzle is connected to output port of an electromagnetic three-way valve through an air supply tube. Input port of the electromagnetic three-way valve is connected to a compressed air source through another air supply tube.
  • the mounting position of the stretch nozzle is changed through adjustment according to the changed weaving width of the loom.
  • the air supply tube connecting between the stretch nozzle and the electromagnetic three-way valve is formed of a single tube. In the adjustment of the stretch nozzle, only the mounting position of the stretch nozzle is adjusted.
  • the air supply tube is formed appropriately to a length that is great enough for the connection between the electromagnetic three-way valve and the stretch nozzle adjusted to the position for the minimum weaving width of the loom. If the stretch nozzle is adjusted to the maximum weaving-width position, a large slack occurs in the air supply tube. If the air jet loom is operated with such large slack in the air supply tube, the air supply tube is swung largely due to the rocking motion of the slay and the connecting parts between the stretch nozzle and the electromagnetic three-way valve is subjected to repeated bending.
  • the air supply tube tends to be damaged by direct contact with the rocking shaft that drives the slay and the repeated bending of the connecting parts.
  • a work person needs to by binding the air supply tube appropriately so as to prevent direct contact of the air supply tube with the rocking shaft by eliminating the slack in the tube.
  • WO 99/34047 A2 discloses a pneumatic weaving machine with a control mechanism for auxiliary nozzles comprising a reed connected by means of a batten mechanism with the main shaft of the weaving machine and consisting of dents fitted with teeth forming a direct guide channel with open profile whose open section is oriented toward the beat-up section with a plurality of auxiliary nozzles connected to a source of compressed air and arranged, in the pick position of the reed, opposite, and in the beat-up position, outside, the open section of the direct guide channel.
  • EP 0 619 391 A1 discloses an insertion system for an air-jet loom, with at least one main blowing nozzle and with means for supplying compressed air to the main blowing nozzles, which contains stationary elements and elements moving together with the main blowing nozzle, the said elements being connected by means of a pressure conduit.
  • the stationary elements are arranged in such a way that the outlet of the stationary elements is located above the inlet of the elements moving together with the main blowing nozzle and, approximately centrally in relation to their end positions.
  • an air jet loom part having the features of claim 1.
  • An air jet loom having such an air jet loom part is stated in claim 4, and a method of using such an air jet loom part is stated in claim 5.
  • Fig. 1 showing a part of an air jet loom in which the weft yarn tension applying apparatus is used
  • the weft yarn tension applying apparatus is designated generally by numeral 1.
  • Fig. 1 shows a part of the air jet loom adjacent to arrival end of the shed of the air jet loom.
  • numeral 2 designates a slay having formed therein a mounting groove extending in the weaving width direction
  • numeral 5 designates a reed having formed therein a weft yarn guide passage 4 of the air jet loom, respectively.
  • the reed 5 is mounted at the bottom thereof in the mounting groove 3 of the slay 2 fixed by an elongate wedge 6.
  • the reed 5 is formed of a plurality of dents 7 arranged in an array and the top ends of the dents 7 are supported by the upper frame 8.
  • the slay 2 has formed therein on the front side thereof a mounting groove 12 having a T-shape in cross-section and extending in the weaving width direction and a sub-nozzle 9, a weft yarn detector 10 and a stretch nozzle 11 that forms a part of the weft yarn tension applying apparatus 1 are movably mounted in the mounting groove 12 of the slay 2 at predetermined positions.
  • a weft yarn capturing tube 13 that forms a part of the weft yarn tension applying apparatus 1 is mounted to the slay 2 on the back side of the reed 5.
  • the weft yarn capturing tube 13 is formed of a tube bent into an L-shape.
  • the weft yarn capturing tube 13 of the L-shape includes a short part 14 having at the end thereof an inlet 15 and a pair of projections 16 and a long part 18 having at the end thereof an outlet 19.
  • the short part 14 of the weft yarn capturing tube 13 is provided extending substantially perpendicular to the reed 5.
  • the projections 16 of the weft yarn capturing tube 13 are provided on the top and the bottom of the inlet 15.
  • the projections 16 are insertable into a space between any two adjacent dents 7 so as to expand the space, thereby allowing the inlet 15 of the weft yarn capturing tube 13 to enter into the weft yarn guide passage 4 of the reed 5.
  • the stretch nozzle 11 has at the end thereof an injection hole 17 that is provided so as to face the inlet 15.
  • the stretch nozzle 11 is mounted movable in a weft insertion direction at a position on a downstream side of the sub-nozzle 9 of the slay 2 so as to be directed perpendicular to the weft yarn guide passage 4.
  • the long part 18 of the weft yarn capturing tube 13 is disposed parallel to the reed 5 and the outlet 19 of the weft yarn capturing tube 13 at the rear end of the long part 18 is opened in weft flying direction.
  • compressed air injected from the injection hole 17 of the stretch nozzle 11 flows across the weft yarn guide passage 4 and enters into the inlet 15. The air is then flowed through the short part 14 and the long part 18 of the weft yarn capturing tube 13 and flowed out through the outlet 19.
  • a rocking shaft 20 is provided below the slay 2 and between left and right frames 43 (only right frame being shown in Figs. 4 and 5 ) of the air jet loom and rotatably supported by the frames 43.
  • the rocking shaft 20 is connected to a drive shaft (not shown) through a coupling 21 to be reciprocated by the drive shaft.
  • a plurality of arms 22 (only one arm being shown in the drawing) is fixedly mounted at the bottom end thereof to the rocking shaft 20 by bolts 23.
  • the slay 2 is supported by and fixed to the arms 22 at the upper end thereof by bolts (not shown). Thus, the slay 2 is swingable by the reciprocating motion of the rocking shaft 20.
  • a mounting block 24 is fixed to the end of the rocking shaft 20 by bolts 25.
  • a stay 26 is fixedly disposed below the rocking shaft 20 and between the left and the right frames 43 of the air jet loom.
  • An air tank 27 for the stretch nozzle 11 is provided at a position adjacent to the right frame 43 of the air jet loom and connected to a valve 28 that is controllably opened and closed.
  • the valve 28 is directly mounted to the air tank 27.
  • the valve 28 may be separated from the air tank 27 and directly mounted to the right or left frame 43 or to a bracket (not shown) which is fixed to the right or the left frames 43 and connected to the air tank 27 through a tube (not shown).
  • the first air supply tube 29 is connected to the valve 28.
  • the first air supply tube 29 has an end 30 that is held by a clamp 33 through a protection tube 31 on the upper surface of the mounting block 24.
  • the clamp 33 is fixed by the bolts 25 to the mounting block 24 that is movable integrally with the rocking shaft 20 by a screw 35.
  • the end 30 of the first air supply tube 29 is fixed to the rocking shaft 20.
  • a part of the first air supply tube 29 that is positioned below the end 30 thereof is fixed to the rear surface of the mounting block 24 by a clamp 34 and a screw 36 through a protection tube 32 thereby to be prevented from swinging freely.
  • a part of the first air supply tube 29 that is adjacent to the valve 28 is fixed to the stay 26 by clamps 38 through protection tubes 37 and has a predetermined slack that permits free reciprocal swinging with the rocking shaft 20.
  • the protection tubes 31, 32 and 37 serve as a protection member to protect the first air supply tube 29 against damage due to direct contact with the clamps 33, 34 and 38.
  • the second air supply tube 39 is connected at one end thereof to the stretch nozzle 11 through a connector 40.
  • the other end 41 of the second air supply tube 39 is connected to the first air supply tube 29 through a connector 42.
  • the second air supply tube 39 is formed with a length that corresponds to the sum of a length between the connecting point of the stretch nozzle 11 provided on the slay 2 and the connecting point of the first air supply tube 29 and a length for a predetermined slack that allows free reciprocal swinging with the slay 2.
  • the weft yarn tension applying apparatus 1 of the preferred embodiment includes the air tank 27 configured to supply compressed air to the stretch nozzle 11, the valve 28, the first air supply tube 29, the second air supply tube 39 and the connectors 40 and 42.
  • the first air supply tube 29 and the second air supply tube 39 cooperate to serve as an air supply tube configured to supply compressed air from the air tank 27 to the stretch nozzle 11.
  • Each of the first and the second air supply tubes 29, 39 is a flexible tube.
  • the first and the second air supply tubes 29, 39 have a flexibility and a predetermined slack that permits free reciprocal swinging with the rocking shaft 20 and free reciprocal swinging with the slay 2 and, therefore, the first and the second air supply tubes 29, 39 are protected against damage.
  • a weft yarn (not shown) is inserted into a warp shed by a weft insertion nozzle (not shown) and assisted in flying through the shed by a sub-nozzle 9.
  • the valve 28 is opened and compressed air in the air tank 27 is supplied through the first and the second air supply tubes 29 and 39 to the stretch nozzle 11 and air is injected from the injection hole 17 of the stretch nozzle 11 in the direction perpendicular to the weft yarn guide passage 4.
  • Part of the weft yarn in the weft yarn guide passage 4 is blown into the weft yarn capturing tube 13 through the inlet 15 thereof by air jet and guided through the short part 14 and the long part 18 of the weft yarn capturing tube 13.
  • the weft yarn is thus kept in a state where the weft yarn is bent at a substantial right angle at a point from the weft yarn guide passage 4 to the short part 14 and also at a point from the short part 14 to the long part 18 in the weft yarn capturing tube 13. Because the end of the inserted weft yarn is held by the dent 7, the stretch nozzle 11 and the weft yarn capturing tube 13 during the beating of the reed 5, the weft yarn is woven into the fabric while being tensioned.
  • a second air supply tube 39A with an appropriate length for the stretch nozzle 11 positioned for the minimum weaving width is selected and the selected second air supply tube 39A is connected at one end thereof to the bottom of the stretch nozzle 11 and at the other end thereof to the end 30 of the first air supply tube 29 through the connectors 40 and 42, respectively.
  • the second air supply tube 39A has a predetermined slack that allows free reciprocal swinging with the slay 2 in such a way that the second air supply tube 39A is not largely swung and, therefore, the second air supply tube 39A is protected against damage due to direct contact with any part.
  • the second air supply tube 39A may only be connected to the first air supply tube 29 through the connector 42 at a position above the end of the rocking shaft 20 and, therefore, the installation of the weft yarn tension applying apparatus 1 may be performed easily.
  • the stretch nozzle 11 is set at a position closer to the frame 43 than in the case of Fig. 4 and the distance between the bottom end of the stretch nozzle 11 and the end 30 of the first air supply tube 29 is shorter, accordingly.
  • the second air supply tube 39B has a length that is shorter than the second air supply tube 39A (refer to Fig. 4 ) that is used for the minimum weaving width of the loom.
  • initial setting of the first air supply tube 29 as installed during the assembling of the air jet loom need not be changed.
  • the installation of the weft yarn tension applying apparatus 1 may be completed by connecting the second air supply tube 39B to the bottom end of the stretch nozzle 11 through the connector 40 and connecting the end 41 of the second air supply tube 39B to the end 30 of the first air supply tube 29 through the connecter 42 after the stretch nozzle 11 has been mounted to the slay 2 at the desired position. Therefore, the relocation of the weft yarn tension applying apparatus 1 according to a change of the weaving width of the loom is easily accomplished.
  • the pressure loss of compressed air supplied to the second air supply tube 39B is smaller than in the case of the second air supply tube 39A, so that difference occurs in the pressure waveforms of the air injected from the stretch nozzle 11 connected to the second air supply tubes 39A and 39B.
  • the opening and closing timing of the valve 28 may be adjusted and changed according to the lengths of the second air supply tubes 39A and 39B so as to lessen the pressure waveform difference between the second air supply tubes 39A and 39B.
  • the pressure waveforms of the second air supply tubes 39A and 39B are different from each other and responsiveness of the second air supply tubes 39A and 39B when performing injection of compressed air is constantly maintained in best conditions.
  • the adjustment of the weft yarn tension applying apparatus 1 to be made when the width of the loom is changed is performed only by selecting a second air supply tube 39 having an appropriate length, connecting the selected second air supply tube 39 at one end thereof to the stretch nozzle 11 through the connector 40 and then connecting the first air supply tube 29 with the second air supply tube 39 through the connector 42 after the stretch nozzle 11 has been mounted to the slay 2 at the desired position.
  • Work person may perform the connecting between the first air supply tube 29 and the second air supply tube 39 while viewing from above the rocking shaft 20 to which the end 30 of the first air supply tube 29 is fixed, so that the connection may be made extremely easy.
  • the length of the second air supply tube 39 for used may be shortened with an increase of the weaving width of the loom.
  • the second air supply tube 39 with an appropriate length for the stretch nozzle 11 which is positioned for the selected weaving width and moved in a weft insertion direction may be easily mounted.
  • a special work such as adjustment of unnecessary slack occurring in the second air supply tube 39 is not required, thereby facilitating setting of the stretch nozzle 11.
  • the first air supply tube 29 fixed to the rocking shaft 20 may be shared.
  • the second air supply tube 39 for the maximum weaving width of the loom which is connected to the stretch nozzle 11 and has an appropriate length without an unnecessary slack may be used. Therefore, the pressure loss of the compressed air is minimized, which contributes to reduction in consumption of compressed air.
  • a weft yarn tension applying apparatus in an air jet loom includes a stretch nozzle, a valve and an air supply tube.
  • the stretch nozzle is mounted movable in a weft insertion direction at a position on a downstream side of the sub-nozzle of the slay so as to be directed perpendicular to the weft yarn guide passage.
  • the valve is connected to an air tank and provided in a part of the frame.
  • the air supply tube connects the stretch nozzle with the valve.
  • the air supply tube includes a first air supply tube connected to the valve and a second air supply tube connected to the stretch nozzle. An end of the first air supply tube is fixed to the rocking shaft, an end of the second air supply tube is connected to the end of the first air supply tube through a connector.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP14169563.5A 2013-05-29 2014-05-23 Air jet loom part with weft yarn tension applying apparatus, air jet loom and method of using the air jet loom part Not-in-force EP2808431B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013112423A JP5884774B2 (ja) 2013-05-29 2013-05-29 エアジェット織機における緯糸張力付与装置

Publications (2)

Publication Number Publication Date
EP2808431A1 EP2808431A1 (en) 2014-12-03
EP2808431B1 true EP2808431B1 (en) 2016-06-15

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ID=50842063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14169563.5A Not-in-force EP2808431B1 (en) 2013-05-29 2014-05-23 Air jet loom part with weft yarn tension applying apparatus, air jet loom and method of using the air jet loom part

Country Status (4)

Country Link
EP (1) EP2808431B1 (ja)
JP (1) JP5884774B2 (ja)
CN (1) CN104213316B (ja)
IN (1) IN2014CH02600A (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105483914B (zh) * 2016-01-12 2017-11-24 青岛天一集团红旗纺织机械有限公司 一种喷气织机纬纱牵伸装置
JP2022014545A (ja) * 2020-07-07 2022-01-20 株式会社豊田自動織機 緯糸張力付与装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6183350A (ja) * 1984-09-27 1986-04-26 日産自動車株式会社 空気噴射式織機の補助空気噴出装置
JPH0318526Y2 (ja) * 1985-09-21 1991-04-18
BE1006981A3 (nl) * 1993-04-06 1995-02-07 Picanol Nv Insertiesysteem voor weefmachines.
JP3454063B2 (ja) * 1997-01-14 2003-10-06 株式会社豊田自動織機 ジェットルームにおける緯糸張力付与装置
EP0919654B1 (de) * 1997-11-28 2002-07-31 Sulzer Textil Ag Verfahren und Vorrichtung zum Eintragen eines Schussfadens in einer Reihenfachwebmaschine
CZ290564B6 (cs) * 1997-12-23 2002-08-14 Vúts Liberec A. S. Vzduchový tkací stroj se zařízením k ovládání přifukovacích trysek
JP2000154441A (ja) * 1998-11-17 2000-06-06 Toyota Autom Loom Works Ltd ジェットルームにおける緯糸張力付与装置
JP2000170057A (ja) 1998-12-09 2000-06-20 Toyota Autom Loom Works Ltd ジェットルームにおける緯糸張力付与装置
JP2004218103A (ja) * 2003-01-10 2004-08-05 Tsudakoma Corp 流体噴射式織機の緯糸張力付与装置
JP5544313B2 (ja) * 2011-01-13 2014-07-09 津田駒工業株式会社 空気噴射式織機における製織方法

Also Published As

Publication number Publication date
IN2014CH02600A (ja) 2015-07-03
CN104213316B (zh) 2016-01-27
JP2014231649A (ja) 2014-12-11
JP5884774B2 (ja) 2016-03-15
EP2808431A1 (en) 2014-12-03
CN104213316A (zh) 2014-12-17

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