EP3653770B1 - Air-jet loom - Google Patents

Air-jet loom Download PDF

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Publication number
EP3653770B1
EP3653770B1 EP19205285.0A EP19205285A EP3653770B1 EP 3653770 B1 EP3653770 B1 EP 3653770B1 EP 19205285 A EP19205285 A EP 19205285A EP 3653770 B1 EP3653770 B1 EP 3653770B1
Authority
EP
European Patent Office
Prior art keywords
air
sub
hose
nozzle
passage
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.)
Active
Application number
EP19205285.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3653770A1 (en
Inventor
Akito Morita
Takahiro Inamura
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
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Toyota Industries Corp
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Filing date
Publication date
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP3653770A1 publication Critical patent/EP3653770A1/en
Application granted granted Critical
Publication of EP3653770B1 publication Critical patent/EP3653770B1/en
Active 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
    • D03D47/3006—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

  • An air-jet loom includes a main nozzle that injects a weft yarn, and a plurality of sub-nozzles that is arranged along a weft insertion passage. Jetting air from the sub-nozzles enhances a force to transport the weft yarn through the weft insertion passage.
  • the volumes of air jetted from the sub-nozzles need to be set high to enhance the force to transport the weft yarn.
  • the volumes of air jetted from the sub-nozzles need to be set high to enhance a tensile force applied to the weft yarn.
  • the volumes of air jetted from the sub-nozzles may be set lower than those on the inlet side and the outlet side.
  • An air-jet loom disclosed in EP2163670 includes an air tank connected to the sub-nozzles that are provided in the vicinity of the center portion of the weft insertion passage and other air tanks connected to the sub-nozzles that are provided on the inlet side and the outlet side of the weft insertion passage, as shown in Fig. 1 of EP2163670 , to improve the energy efficiency. More specifically, an air pressure in the air tank connected to the sub-nozzles that are provided in the vicinity of the center portion of the weft insertion passage is lower than the air pressures in the air tanks connected to the sub-nozzles that are provided on the inlet side and the outlet side of the weft insertion passage in the air-jet loom shown in Fig. 1 of EP2163670 .
  • the high air-pressure zone in which the volumes of air jetted from the sub-nozzles are high and the low air-pressure zone in which the volumes of air jetted from the sub-nozzles are low are at fixed positions determined by the positions of the air tanks to which those sub-nozzles are connected. These positions of the high air-pressure zone and the low air-pressure zone cannot be changed suitably for the width of the warp sheet in the reed to weave.
  • the present disclosure has been made in view of the above circumstances and is directed to providing an air-jet loom that is capable of adjusting the positions of a high air-pressure zone and a low air-pressure zone in the weft insertion passage, by easily changing the volumes of air jetted from a plurality of sub-nozzles, individually.
  • EP 2 163 670 A1 discloses an air jet loom according to the preamble portion of claim 1 of the present invention. Further air jet looms are disclosed in US 4 651 785 A , JP 2016 172937 A and US 4 458 731 A .
  • an air-jet loom in accordance with an aspect of the present disclosure, there is provided an air-jet loom.
  • the air-jet loom includes a main nozzle that injects a weft yarn into a weft insertion passage, a plurality of sub-nozzles that is arranged along the weft insertion passage and from which air is jetted, and an air tank that is connected to the plurality of the sub-nozzles and reserves air therein.
  • the plurality of the sub-nozzles includes a first sub-nozzle from which air is jetted into a high air-pressure zone of the weft insertion passage, and a second sub-nozzle from which air is jetted into a low air-pressure zone of the weft insertion passage.
  • a first hose is provided between the first sub-nozzle and the air tank and a second hose is provided between the second sub-nozzle and the air tank.
  • a flow resistance in a first air passage between the first sub-nozzle and the air tank is lower than a flow resistance in a second air passage between the second sub-nozzle and the air tank.
  • a first sleeve is fitted into an end portion of the first hose on the air tank side and a second sleeve is fitted into an end portion of the second hose on the air tank side.
  • An internal diameter of the second sleeve is smaller than an internal diameter of the first sleeve to change the flow resistance.
  • roughness of an inner surface of the second hose is higher than roughness of an inner surface of the first hose to change the flow resistance.
  • an inner surface area of the second hose is wider than an inner surface area of the first hose to change the flow resistance.
  • an air-jet loom 100 includes a reed 20, a main nozzle 15 injecting a weft yarn into a weft insertion passage 21 that is formed along the reed 20, and twenty-four sub-nozzles 14 that are arranged along the weft insertion passage 21.
  • the weft insertion passage 21 has high air-pressure zones H on an inlet side and an outlet side of the weft insertion passage 21.
  • the weft insertion passage 21 also has a low air-pressure zone L between the high air-pressure zone H on the inlet side and the high air-pressure zone H on the outlet side.
  • the sub-nozzle 14 that is arranged at a position associated with the high air-pressure zone H into which air is jetted therefrom is a first sub-nozzle 14a
  • the sub-nozzle 14 that is arranged at a position associated with the low air-pressure zone L into which air is jetted therefrom is a second sub-nozzle 14b.
  • the volume of air jetted from the first sub-nozzle 14a is higher than the volume of air jetted from the second sub-nozzle 14b.
  • the number of the first sub-nozzles 14a associated with the high air-pressure zone H on the inlet side of the weft insertion passage 21 is eight
  • the number of the first sub-nozzles 14a associated with the high air-pressure zone H on the outlet side of the weft insertion passage 21 is also eight.
  • each of first hoses 13a is connected to each of the first sub-nozzles 14a.
  • the other end of each of the first hoses 13a is connected to an air tank 40 that reserves air therein.
  • One end of each of second hoses 13b is connected to each of the second sub-nozzles 14b.
  • the other end of each of the second hoses 13b is also connected to the air tank 40.
  • a valve 30 is provided for every four first hoses 13a, and is disposed between the first hoses 13a and the air tank 40.
  • a valve 30 is provided for every four second hoses 13b and is disposed between the second hoses 13b and the air tank 40.
  • six valves 30 are provided for sixteen first sub-nozzles 14a and eight second sub-nozzles 14b.
  • the first hoses 13a or the second hoses 13b are connected to the air tank 40 via a fixing members 50.
  • a connector 11 is used to attach one end portion of each of the first hoses 13a or the second hoses 13b to the fixing member 50.
  • a connecting passage 51 that connects the first hoses 13a or the second hoses 13b to the air tank 40 is formed in the fixing member 50.
  • the valve 30 is attached to the fixing member 50. The valve 30 switches between the open state and the closed state of the connecting passage 51 through which air flows, and adjusts the air flow rate therethrough.
  • a substantially cylindrical shaped sleeve 12 is fitted into the end portion, on the air tank 40 side, of each of the first hoses 13a and the second hoses 13b each of which is inserted into the connecting passage 51 in the fixing member 50.
  • the sleeve 12 fitted into the end portion of the first hose 13a on the air tank 40 side is referred to as a first sleeve 12a.
  • the sleeve 12 fitted into the end portion of the second hose 13b on the air tank 40 side is referred to as a second sleeve 12b.
  • An internal diameter D1 of the first sleeve 12a is larger than an internal diameter D2 of the second sleeve 12b.
  • a flow resistance in a first air passage 16a formed inside the first hose 13a disposed between the first sub-nozzle 14a and the air tank 40 is lower than a flow resistance in a second air passage 16b formed inside the second hose 13b disposed between the second sub-nozzle 14b and the air tank 40.
  • the flow resistance here refers to a force that interferes with an air flow in the first air passage 16a or the second air passage 16b depending on the shape thereof.
  • the flow resistance in the first air passage 16a between the first sub-nozzle 14a and the air tank 40 is lower than the flow resistance in the second air passage 16b between the second sub-nozzle 14b and the air tank 40. This allows the volume of air jetted from the first sub-nozzle 14a into the high air-pressure zone H of the weft insertion passage 21 to be higher than the volume of air jetted from the second sub-nozzle 14b into the low air-pressure zone L in the weft insertion passage 21.
  • the sub-nozzle 14 connected to the air passage with a lower flow resistance has a higher volume of air jetted therefrom, which is the first sub-nozzle 14a
  • the sub-nozzle 14 connected to the air passage with a higher flow resistance has a lower volume of air jetted therefrom, which is the second sub-nozzle 14b.
  • the high air-pressure zone H is thereby set to a position where the first sub-nozzle 14a is arranged
  • the low air-pressure zone L is thereby set to a position where the second sub-nozzle 14b is arranged.
  • the positions of the high air-pressure zone H and the low air-pressure zone L are adjustable suitably for a changed width of the warp sheet in the reed to weave.
  • the volumes of air jetted from the sub-nozzles 14 are individually adjustable, independently of the air tank 40 or the valves 30 to which the sub-nozzles 14 are connected.
  • the flow resistance in the air passage between the sub-nozzle 14 and the air tank 40 may be changed by selecting and appropriately exchanging between the first sleeve 12a having the larger internal diameter D1 and the second sleeve 12b having the smaller internal diameter D2. This thereby allows determining how much volume of air jetted from the sub-nozzle 14 to reduce according to the dimension of the sleeve 12, and easily changing the positions of the high air-pressure zones H and the low air-pressure zones L in the weft insertion passage 21.
  • the stiffness of the hose disposed between the sub-nozzle 14 and the air tank 40 is not affected by the difference in the flow resistance in the air passage.
  • the internal diameter of the first hose 13a and the internal diameter of the second hose 13b may be different from each other, as shown in FIG. 5 .
  • the internal diameter of the first hose 13a shown in FIG. 5A is larger than the internal diameter of the second hose 13b shown in FIG. 5B
  • the flow resistance in the second air passage 16b is higher than the flow resistance in the first air passage 16a.
  • the length of the second hose 13b may be set greater than the length of the first hose 13a, and the flow resistance in the second air passage 16b may be set higher than the flow resistance in the first air passage 16a. Even when the length is varied between the second hose 13b and the first hose 13a, the diameter and the material of these two hoses may be the same, which allows the component procurement easier.
  • the inner surface of the second hose 13b may be processed to be rough, as shown in FIG. 6 .
  • providing an abrasive to the inner surface of the second hose 13b gives a higher degree of roughness to the inner surface of the second hose 13b shown in FIG. 6B than the roughness of the inner surface of the first hose 13a shown in FIG. 6A .
  • the flow resistance in the second air passage 16b thus becomes higher than the flow resistance in the first air passage 16a.
  • the cross-sectional shape of the first hose 13a and the cross-sectional shape of the second hose 13b may be different from each other, as shown in FIG. 7 .
  • the cross-sectional shape of the inner surface of the first hose 13a shown in FIG. 7A is circular
  • the cross-sectional shape of the inner surface of the second hose 13b shown in FIG. 7B is irregular. That is, the inner surface area of the second hose 13b is wider than the inner surface area of the first hose 13a.
  • the flow resistance in the second air passage 16b thus becomes higher than the flow resistance in the first air passage 16a.
  • the cross-sectional shape of the inner surface may be varied between the first hose 13a and the second hose 13b by using different extrusion dies to form the hoses.
  • the color of the hoses may be made different between the first hose 13a and the second hose 13b.
  • An air-jet loom (100) includes a main nozzle (15) that injects a weft yarn into a weft insertion passage (21), a plurality of sub-nozzles (14) that is arranged along the weft insertion passage (21) and from which air is jetted, and an air tank (40) that is connected to the plurality of the sub-nozzles (14) and reserving air therein.
  • the plurality of the sub-nozzles (14) includes a first sub-nozzle (14a) from which air is jetted into a high air-pressure zone (H) of the weft insertion passage (21), and a second sub-nozzle (14b) from which air is jetted into a low air-pressure zone (L) of the weft insertion passage (21).
  • a flow resistance in a first air passage (16a) between the first sub-nozzle (14a) and the air tank (40) is lower than a flow resistance in a second air passage (16b) between the second sub-nozzle (14b) and the air tank (

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19205285.0A 2018-11-19 2019-10-25 Air-jet loom Active EP3653770B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018216336A JP7429095B2 (ja) 2018-11-19 2018-11-19 エアジェット織機

Publications (2)

Publication Number Publication Date
EP3653770A1 EP3653770A1 (en) 2020-05-20
EP3653770B1 true EP3653770B1 (en) 2021-06-02

Family

ID=68344686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19205285.0A Active EP3653770B1 (en) 2018-11-19 2019-10-25 Air-jet loom

Country Status (3)

Country Link
EP (1) EP3653770B1 (ja)
JP (1) JP7429095B2 (ja)
CN (1) CN111197195B (ja)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4912143B1 (ja) * 1967-06-28 1974-03-22
JPS6014139B2 (ja) * 1981-10-02 1985-04-11 日産自動車株式会社 空気噴射式織機における補助ノズルヘの空気分配路構造
FR2556375B1 (fr) * 1983-12-13 1986-06-20 Saurer Diederichs Sa Dispositif d'alimentation en air comprime pour machine a tisser avec insertion pneumatique d'au moins deux fils de trame
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
JPH10273853A (ja) * 1997-03-28 1998-10-13 Toyota Autom Loom Works Ltd ジェットルームにおける緯入れ装置
JP3065779U (ja) * 1999-07-14 2000-02-08 櫻護謨株式会社 ホ―ス
JP2002105801A (ja) * 2000-10-02 2002-04-10 Toyota Industries Corp エアジェット織機における圧縮空気供給装置
JP2004091936A (ja) * 2002-08-29 2004-03-25 Toray Ind Inc 織機の緯入れ装置
CN2880865Y (zh) * 2005-12-05 2007-03-21 江苏万工科技集团有限公司 气动机构的节流装置
JP4664268B2 (ja) 2006-11-30 2011-04-06 紀州技研工業株式会社 インクジェットプリンタ
EP2163670B1 (en) 2008-09-12 2014-11-05 Picanol Method for controlling transportation of a weft thread through a shed
JP6172186B2 (ja) * 2015-03-17 2017-08-02 株式会社豊田自動織機 エアジェット織機における緯入れ制御方法及びエアジェット織機における緯入れ装置

Also Published As

Publication number Publication date
JP7429095B2 (ja) 2024-02-07
CN111197195B (zh) 2021-10-29
EP3653770A1 (en) 2020-05-20
JP2020084341A (ja) 2020-06-04
CN111197195A (zh) 2020-05-26

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