CN103184648B - Auxiliary nozzle of air jet loom - Google Patents

Auxiliary nozzle of air jet loom Download PDF

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Publication number
CN103184648B
CN103184648B CN201210572778.0A CN201210572778A CN103184648B CN 103184648 B CN103184648 B CN 103184648B CN 201210572778 A CN201210572778 A CN 201210572778A CN 103184648 B CN103184648 B CN 103184648B
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China
Prior art keywords
axis
pilot jet
nozzle bore
jet
air
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CN201210572778.0A
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Chinese (zh)
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CN103184648A (en
Inventor
牧野洋一
后藤卓治
青山裕朗
山口隆司
三轮和也
滨口敦司
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Toyota Industries Corp
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Toyoda Automatic Loom Works Ltd
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    • 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

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

Abstract

A auxiliary nozzle of an air jet loom includes a nozzle hole formed through a front wall of the auxiliary nozzle and having an inner opening opening to inside of the auxiliary nozzle and an outer opening opening to outside of the auxiliary nozzle. An axis extending in longitudinal direction of the auxiliary nozzle through axial center of the auxiliary nozzle is defined as center axis. An axis intersecting with the center axis and extending in a direction perpendicular to the front wall is defined as weft insertion axis. An axis extending through center of the inner opening and center of the outer opening is defined as nozzle hole axis. The nozzle hole axis is angularly spaced horizontally from the weft insertion axis. Weft insertion is accomplished by compressed air injected from the nozzle hole. The center of the inner opening is positioned on the weft insertion axis.

Description

The pilot jet of air-jet loom
Technical field
The present invention relates to a kind of pilot jet of air-jet loom.
Background technology
In air-jet loom, by being spurted into air-spray in the weft yarn guiding channel in the race that is arranged on warp thread by main burner and spraying by pilot jet the air-spray that passes through race with auxiliary weft and realize wefting insertion.Must make pilot jet enter as few as possible in the race of warp thread, to reduce as much as possible the interference of nozzle and warp thread.Due to the structure of the weft inserting apparatus in air-jet loom, between the in-position of pilot jet that inevitably need to be in the race of walking path and warp thread of introduced weft yarn, there is predetermined distance, therefore, require towards the air-spray spraying in path of walking of weft yarn, to there is high directionality from pilot jet.
Japanese Patent Application Publication document 8-60492 discloses a kind of pilot jet, and it can be parallel to warp thread setting, so that the diffusion of the air that restriction is sprayed from pilot jet and reducing and the interference of warp thread.
The pilot jet of above-mentioned open source literature is formed as flat hollow tube, and it is substantially parallel to each other during installation in position in air-jet loom that the antetheca of this hollow tube and rear wall are arranged in pilot jet.Pilot jet forms by Fiat Reduces Development Time, thereby towards its upper end convergent and in upper end closure.In the position of closing on pilot jet upper end, through the antetheca of pilot jet, be formed with nozzle bore.The center that pilot jet is departed from the center of nozzle bore on the following width of pilot jet: when in position on the slay of pilot jet at air-jet loom, nozzle bore is positioned at the position of the reed that closes on loom.Nozzle bore is also formed as making its axis points upwards obliquely.That is, nozzle bore is processed into its orientation of its axis top and is oriented in the direction of reed.In addition, nozzle bore in the direction through the Air Flow in hole with the outside convergent of constant ratio.
Due to the said structure of pilot jet, the compressed air in nozzle bore is by leg surface aggregation in it, thereby makes when prevent oxygen diffusion when pilot jet sprays air.In addition, although the flat hollow tube of pilot jet is arranged to be parallel to warp thread, but nozzle bore is positioned in the side of closing on reed of pilot jet and the orientation of its axis reed side of nozzle bore, thereby makes effectively to act at weft yarn and walk on the weft yarn of walking in path from the air-spray of nozzle.
But, in the pilot jet of above-mentioned open source literature, only notice the setting that closes on weft yarn and walk the nozzle bore in path, but the problem of this pilot jet be, reduced the expulsion pressure of the air spraying from nozzle bore.Pilot jet is formed as flat hollow tube and in upper end sealing, compressed air is supplied to pilot jet from the bottom of pilot jet.Conventionally, in compressed air in this hollow tube stream, in the region of inwall of closing on pipe, there will be pressure loss, thereby make to become the highest around the compressed-air actuated pressure of the center flow of pipe.
But, in the pilot jet of above-mentioned open source literature, the center of nozzle bore---, and the axis of nozzle bore---along the width of pilot jet, depart from the center of pilot jet.Therefore, the compressed-air actuated major part of closing on the center flow of pilot jet and having a maximum pressure on the width of pilot jet is not successfully introduced in nozzle bore, but impinges upon on the inner surface of upper end of pilot jet.The air revolution of clashing into, flows and is introduced in nozzle bore towards nozzle bore downwards along the inner surface of antetheca.Therefore the compressed air of center flow that, closes on pilot jet on the width of pilot jet and thickness direction is because the friction between the shock on the inner surface of the upper end at pilot jet and compressed air and the inner surface of antetheca causes the pressure loss.Therefore, the air of pressure decreased is by the injected nozzle bore through pilot jet.In order to produce the air-spray of tool speed step likely, to allow stably to transport the race of weft yarn through warp thread by the pilot jet of above-mentioned open source literature, need to supply with the compressed air with elevated pressures to pilot jet.But increasing compressed-air actuated pressure only increases the energy consumption of air-jet loom.
The present invention aims to provide a kind of pilot jet that can increase expulsion pressure and improve the air-jet loom of the directionality of air-spray.
Summary of the invention
The pilot jet of air-jet loom comprises nozzle bore, and described nozzle bore forms and have the inner opening and the outside outward opening that leads to described pilot jet of the inside of leading to described pilot jet through the antetheca of described pilot jet.The axis extending by the axial centre of described pilot jet along the longitudinal direction of described pilot jet is defined as central axis.Axis crossing with described central axis and that extend along the direction perpendicular to described antetheca is defined as wefting insertion axis.The axis that extends through the center of described inner opening and the center of described outward opening is defined as nozzle bore axis.Described nozzle bore axis is angularly spaced apart with described wefting insertion axis in the horizontal direction.By the compressed air spraying from described nozzle bore, realize wefting insertion.Being centrally located on described wefting insertion axis of described inner opening.
From below as the example explanation principle of the invention, by reference to the accompanying drawings the description carried out, it is clear that other aspects and advantages of the present invention will become.
Accompanying drawing explanation
In claims, set forth particularly the feature of the present invention that is considered to innovation.By reference to understanding best the present invention and object and advantage below in conjunction with accompanying drawing to the explanation of current preferred embodiment, in the accompanying drawings:
Fig. 1 illustrates the schematic block diagram having according to the air-jet loom of the pilot jet of the preferred embodiment of the present invention;
Fig. 2 is the cross sectional view illustrating for the fixed structure of the pilot jet of the air-jet loom of Fig. 1;
Fig. 3 is the partial front elevation view of the amplification of the pilot jet of Fig. 2;
Fig. 4 is the cross sectional view intercepting along the line A-A in Fig. 3;
Fig. 5 is the local longitudinal cross-section view of the pilot jet of Fig. 2; And
Fig. 6 is the partial schematic front view of the amplification of the pilot jet of Fig. 2, and it has described compressed air flowing in pilot jet.
The specific embodiment
Hereinafter with reference to Fig. 1 to 6 description according to the pilot jet of the air-jet loom of the preferred embodiment of the present invention.In Fig. 1, by Reference numeral 1 and 2, indicate air-jet looms and the weft inserting apparatus for air-jet loom respectively generally.Weft inserting apparatus 2 comprises main burner 3, be arranged on main burner 3 upstream series nozzle 4 and be arranged on multiple pilot jets 5 in the downstream of main burner 3.Main burner 3 and pilot jet 5 are fixedly mounted on the slay 6 of air-jet loom 1 (with reference to figure 2) and can reciprocally swing back and forth the front and back at air-jet loom 1 together with slay 6.Series nozzle 4 is fixed on the framework (not shown) of air-jet loom 1 or is fixed on the bracket (not shown) being fixed on the (not shown) of ground.Weft inserting apparatus 2 comprises Weft feeding device 7 and weft measurement and the storage device 9 of the upstream that is all arranged on series nozzle 4 in addition.Use weft yarn pin (not shown), it is that extract out from Weft feeding device 7 and corresponding to the weft yarn 8 of the predetermined length of braiding fabric width that weft measurement and storage device 9 store and measure.
Main valve 10 is connected in main burner 3 by managing 11, to controllably supply compressed air to main burner 3.Similarly, series valve 12 is connected in series nozzle 4 by managing 13, to controllably supply compressed air to series nozzle 4.Main valve 10 and series valve 12 are connected in shared air tank 16 by managing 14,15 respectively.Air tank 16 is connected in shared air supplies (not shown) by master selector 17, pressure gauge 18 and filter 19, and this air supplies comprises the compressor being for example arranged in weaving mill.In air tank 16, store from compressed air air supplies supply and be adjusted to setting pressure by master selector 17.
Pilot jet 5 is divided into multiple groups (in Fig. 1, only showing two groups), and the pilot jet in every group 5 only shows two auxiliary valves 20 by managing the 21 auxiliary valve 20(that are connected to the framework (not shown) that is fixed on air-jet loom 1 in Fig. 1).The auxiliary valve 20 of each group is connected in shared auxiliary air tank 23 by managing 22.Auxiliary air tank 23 is connected in pipe 24 pipe 26 that is connected master selector 17 and pressure gauge 18 by auxiliary governor 25.Auxiliary air tank 23 stores from the compressed air supply of air supplies (not shown) and be adjusted to setting pressure by auxiliary governor 25.Auxiliary valve 20 can be used in the wefting insertion operating period of loom and opens in the mode continuing in controlled timing, to allow the pilot jet 5 of each group to spray air-spray in the mode continuing.
Main valve 10, series valve 12, auxiliary valve 20 and pressure gauge 18 are electrically connected on the control device 27 of air-jet loom 1 by distribution 28 to 32.Control device 27 be sent under the predetermined crank angle of loom, activate main valve 10, series valve 12 and auxiliary valve 20 control signal in case wefting insertion to the race of warp thread.
With reference to figure 2, pilot jet 5 and reed 33 are fixed on slay 6.Reed 33 comprises upper frame 35, underframe 36 and a large amount of dents 34, and dent 34 is connected to upper frame 35 and underframe 36 with its contrary end.Underframe 36 is fixed on slay 6.Each dent 34 there is dewclaw 37, lower claw 38 and be formed on dewclaw 37 and lower claw 38 between U-shaped weft yarn guide opening.Multiple this weft yarn guide opening coordinate and formation weft yarn guiding channel 39.Meanwhile, each pilot jet 5 is fixed on slay 6.Particularly, the pilot jet retainer 40 that supports pilot jet 5 only shows pair of bolts and nut by the bolt 42 and the nut 43(that are arranged in the groove 41 of slay 6 in figure) be anchored on slay 6.Each pilot jet 5 thereon 44 places, end is formed with nozzle bore 45 through pilot jet 5, and pipe 21(Fig. 1) be connected in the bottom 46 of pilot jet 5.
Below with reference to Fig. 3 to 5, describe pilot jet 5 in detail.Pilot jet 5 comprises flat hollow tube, and this flat hollow pipe has upper end 44, antetheca 47 and rear wall 48(Fig. 4 of sealing).The flat hollow pipe of pilot jet 5 can form by Fiat Reduces Development Time.Pilot jet 5 has width H(Fig. 3 and 4) and be wherein formed with the hollow space that serves as air duct 49.As shown in Figure 2, in the situation that pilot jet 5 is fixed on slay 6, smooth antetheca 47 and smooth rear wall 48 are arranged to be parallel to warp thread, to reduce the interference between pilot jet 5 and warp thread.
Position in the upper end 44 of closing on pilot jet 5 forms nozzle bore 45 through antetheca 47.Can form nozzle bore 45 by electric discharge or mechanical processing process.Nozzle bore 45 is formed as the passage of convergent, this passage has circular inner opening 50 and circular outward opening 51, this circular inner opening 50 leads to air duct 49 and has center 50A, and this circular outward opening 51 leads to the outside of pilot jet 5 and has center 51A.With reference to figure 3 and 4, on the longitudinal direction of pilot jet 5, extend, at the axis along the width H of pilot jet 5 and the axial centre place of thickness direction of pilot jet 5, by X, indicated and be called central axis, crossing with central axis X and at the antetheca 47(perpendicular to pilot jet 5 or perpendicular to the longitudinal direction of pilot jet 5) the upwardly extending axis in side by Y, indicated and be called wefting insertion axis, and the axis that extends through inner opening 50 center 50A and outward opening 51 center 51A is indicated by Z and is called nozzle bore axis.
Nozzle bore 45 is formed as making inner opening 50 center 50A to be positioned at wefting insertion axis Y upper (with reference to Figure 4 and 5), and nozzle bore axis Z is angularly spaced apart with the angle of α degree towards reed 33 sides and wefting insertion axis Y in the horizontal direction as shown in Figure 4.Therefore, outward opening 51 center 51A is spaced apart along width and the wefting insertion axis Y of pilot jet 5.In other words, as shown in Figure 2, in the situation that pilot jet 5 is fixed on slay 6, outward opening 51 center 51A separates towards reed 33 sides and the wefting insertion axis Y of loom 1.Antetheca 47 and rear wall 48 at pilot jet 5 are arranged to be parallel to warp thread (not shown), and the weft yarn guiding channel 39 that can form towards the weft yarn guide opening by each dent 34 from outward opening 51 sprays air.
It should be noted that according to the present invention, nozzle bore 45 can be formed in the common admissible margin of tolerance, and it allows inner opening 50 center 50A to be positioned to depart from a little wefting insertion axis Y.
As shown in Figure 5, it is angularly spaced apart with the angle of β degree with wefting insertion axis Y towards the upper end 44 of pilot jet 5 that nozzle bore 45 is also formed as making nozzle bore axis Z in the vertical direction.In other words, in the situation that pilot jet 5 is fixed on slay 6, nozzle bore axis Z points to the far-reaching upper corner of weft yarn guiding channel 39, as shown in Figure 2, thereby make the power being caused by air-spray can be effectively applied to weft yarn 8, so that weft yarn 8 can pass through race effectively.
Nozzle bore 45 is also formed as making the area of outward opening 51 to be less than the area of inner opening 50.Nozzle bore 45 outward opening 51 with constant taper rate convergent (with reference to Figure 4 and 5).The air flowing out through nozzle bore 45 is assembled on interior leg surface 52 by convergent along nozzle-axis Z, thereby can improve the injection direction of air-spray.
In Fig. 6, by dotted arrow, schematically show the compressed-air actuated different flow directions in the air duct 49 of pilot jet 5.The compressed air being supplied in pilot jet 5 flows towards the upper end 44 of pilot jet 5 in air duct 49, and the compressed air of maximum pressure keeps around central axis X.In pilot jet 5, it is upper that inner opening 50 center 50A is positioned at wefting insertion axis Y, and therefore in the front view of the pilot jet 5 shown in Fig. 6, center 50A is also projected in central axis X, therefore can guide most of high pressure air into nozzle bore 45.
Guiding the compressed air of nozzle bore 45 into is assembled and under high pressure from outward opening 51 edges, by the indicated injection direction T of the bold arrow Fig. 6, is sprayed along nozzle bore axis Z by the interior leg surface 52 of convergent.As described earlier make injection direction T in the horizontal direction with wefting insertion axis Y with α angle and in the vertical direction and identical axis Y with angularly spaced apart can improvement towards the directionality of introducing the injection direction T of the air-spray of the weft yarn 8 of weft yarn guiding channel 39 by main burner 3 of β angle.
Described in being not restricted to, the present invention preferred embodiment, but can put into practice the present invention with the following variety of way being exemplified.
(1) the interior leg surface 52 of the nozzle bore 45 of pilot jet 5 can be extended continuously on straight ground as seen in the cross section (Fig. 4) of pilot jet 5, but bending or warpage by any way, as seen in the same cross-sectional of pilot jet 5, as long as the outside convergent of nozzle bore 45.
(2) nozzle bore 45 can be with constant taper rate convergent, but nozzle bore 45 can be divided into multiple regions with different taper rate in the direction of convergent.
(3) the interior leg surface 52 of the nozzle bore 45 of pilot jet 5 can be formed as being parallel to nozzle bore axis Z.
(4) cross section of nozzle bore 45 of the pilot jet 5 intercepting perpendicular to nozzle bore axis Z is not limited to round-shaped, but it can be any other shape of for example oval, square or star shape.
(5) the smooth antetheca 47 of pilot jet 5 and smooth rear wall 48 can be formed as being parallel to warp thread, but they can be arranged to angularly tilt with respect to warp thread.

Claims (5)

1. a pilot jet for air-jet loom, comprising:
Nozzle bore, described nozzle bore forms through the antetheca of described pilot jet, and there is the inner opening and the outside outward opening that leads to described pilot jet of the inside of leading to described pilot jet, wherein, the axis that extends through the axial centre of described pilot jet along the longitudinal direction of described pilot jet is defined as central axis, axis crossing with described central axis and that extend along the direction perpendicular to described antetheca is defined as wefting insertion axis, the axis that extends through the center of described inner opening and the center of described outward opening is defined as nozzle bore axis, described nozzle bore axis is angularly spaced apart with described wefting insertion axis in the horizontal direction, by the compressed air spraying from described nozzle bore, realize wefting insertion, it is characterized in that, being centrally located on described wefting insertion axis of described inner opening.
2. the pilot jet of air-jet loom according to claim 1, is characterized in that, described nozzle bore axis in the vertical direction is angularly spaced apart towards upper end and the described wefting insertion axis of described pilot jet.
3. the pilot jet of air-jet loom according to claim 1, is characterized in that, the area of described outward opening is less than the area of described inner opening.
4. the pilot jet of air-jet loom according to claim 3, is characterized in that, described nozzle bore with constant taper rate towards described outward opening convergent.
5. the pilot jet of air-jet loom according to claim 1, is characterized in that, the rounded shape of cross section of the described nozzle bore intercepting perpendicular to described nozzle bore axis.
CN201210572778.0A 2011-12-28 2012-12-25 Auxiliary nozzle of air jet loom Active CN103184648B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011287050A JP5692055B2 (en) 2011-12-28 2011-12-28 Sub-nozzle of air jet loom
JP2011-287050 2011-12-28

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CN103184648A CN103184648A (en) 2013-07-03
CN103184648B true CN103184648B (en) 2014-04-23

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105155104A (en) * 2015-08-06 2015-12-16 江南大学 Energy-saving round hole auxiliary nozzle for air jet loom
EP3640382B1 (en) * 2018-10-16 2021-07-07 Tsudakoma Kogyo Kabushiki Kaisha Sub-nozzle for air jet loom
JP7311297B2 (en) * 2018-10-16 2023-07-19 津田駒工業株式会社 Sub-nozzle of air jet loom
JP7364356B2 (en) * 2019-05-13 2023-10-18 津田駒工業株式会社 Sub-nozzle for air-jet looms

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3020103B2 (en) * 1989-09-08 2000-03-15 株式会社豊田中央研究所 Sub-nozzle in air jet loom
JPH04352850A (en) * 1991-05-28 1992-12-07 Toyota Autom Loom Works Ltd Auxiliary nozzle for air jet type weaving machine
JPH05132837A (en) * 1991-11-07 1993-05-28 Toyota Autom Loom Works Ltd Subnozzle in air-jet loom
JPH06346342A (en) * 1993-06-02 1994-12-20 Toray Ind Inc Subnozzle for air-jet loom
JPH0860492A (en) 1994-08-22 1996-03-05 Toyota Autom Loom Works Ltd Auxiliary nozzle of air jet loom
EP0707101A3 (en) * 1994-10-04 1997-10-08 Antonio Bortolamai Device for feeding weft threads into the shed in air looms
CH688284A5 (en) * 1994-10-04 1997-07-15 Antonio Bortolamai Device for inserting weft in shed of air jet loom
JP2001295159A (en) * 2000-04-04 2001-10-26 Tsudakoma Corp Subnozzle for weft insertion
JP5603592B2 (en) * 2009-12-03 2014-10-08 株式会社豊田自動織機 Weft insertion device for air jet loom

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Publication number Publication date
EP2610378B1 (en) 2014-05-21
EP2610378A1 (en) 2013-07-03
JP2013136846A (en) 2013-07-11
CN103184648A (en) 2013-07-03
JP5692055B2 (en) 2015-04-01

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