CN103184648A

CN103184648A - Auxiliary nozzle of air jet loom

Info

Publication number: CN103184648A
Application number: CN2012105727780A
Authority: CN
Inventors: 牧野洋一; 后藤卓治; 青山裕朗; 山口隆司; 三轮和也; 滨口敦司
Original assignee: Toyoda Automatic Loom Works Ltd
Current assignee: Toyota Industries Corp
Priority date: 2011-12-28
Filing date: 2012-12-25
Publication date: 2013-07-03
Anticipated expiration: 2032-12-25
Also published as: EP2610378B1; EP2610378A1; JP2013136846A; CN103184648B; JP5692055B2

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 the air-spray in the weft yarn guiding channel in the race that is arranged on warp thread by main burner and spraying the air-spray that passes through race with auxiliary weft by pilot jet and realize wefting insertion.Pilot jet is entered in the race of warp thread as few as possible, in order to reduce the interference of nozzle and warp thread as much as possible.Because the structure of the weft inserting apparatus in the air-jet loom, there is predetermined distance between the in-position of pilot jet that inevitably need be in the race of walking path and warp thread of the weft yarn of introducing, therefore, require to have high directionality from pilot jet towards the air-spray that sprays in the path of walking of weft yarn.

Japanese Patent Application Publication document 8-60492 discloses a kind of pilot jet, and it can be parallel to the warp thread setting, so that the diffusion of the air that restriction is sprayed from pilot jet and reduce interference with warp thread.

The pilot jet of above-mentioned open source literature forms flat hollow tube, and it is parallel to each other basically 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 the deep-drawing process, thereby towards its upper end convergent and in the upper end closure.The antetheca that passes pilot jet in the position of closing on the pilot jet upper end is formed with nozzle bore.The center of pilot jet is departed from the center of nozzle bore at 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 also forms and makes its axis points upwards obliquely.That is, nozzle bore is processed into its orientation of its axis top and is oriented on the direction of reed.In addition, nozzle bore on the direction that the air that passes the hole flows with the outside convergent of constant ratio.

Because the said structure of pilot jet, the compressed air in the nozzle bore are by leg surface aggregation in it, thereby the feasible air that prevents when from the pilot jet injection air spreads.In addition, although the flat hollow tube of pilot jet is arranged to be parallel to warp thread, but nozzle bore is positioned on the side of closing on reed of pilot jet and the orientation of its axis reed side of nozzle bore, walks on the weft yarn of walking in the path thereby make air-spray from nozzle act on effectively at weft yarn.

Yet, in the pilot jet of above-mentioned open source literature, only notice and close on the setting that weft yarn is walked the nozzle bore in path, but the problem of this pilot jet be, reduced the expulsion pressure of the air that sprays from nozzle bore.Pilot jet forms flat hollow tube and in the upper end sealing, compressed air supplies to the pilot jet from the bottom of pilot jet.Usually, in the compressed air stream in this hollow tube, in closing on the inner wall region of pipe, pressure loss can occur, thereby the feasible compressed-air actuated pressure that centers on the center flow of pipe becomes the highest.

Yet, in the pilot jet of above-mentioned open source literature, the center of nozzle bore---namely, and the axis of nozzle bore---depart from the center of pilot jet along the width of pilot jet.Therefore, successfully do not introduced in the nozzle bore in the compressed-air actuated major part that the width of pilot jet closes on the center flow of pilot jet and has a maximum pressure, but impinged upon on the inner surface of upper end of pilot jet.The air revolution of bump is flowed and is introduced in the nozzle bore towards nozzle bore downwards along the inner surface of antetheca.Therefore, at the compressed air of the center flow that width and the thickness direction of pilot jet closes on pilot jet owing to the friction between the inner surface of the bump on the inner surface in the upper end of pilot jet and compressed air and antetheca causes the pressure loss.Therefore, the air of pressure reduction is with the injected nozzle bore that passes pilot jet.In order to allow stably to transport the race that weft yarn passes warp thread by the pilot jet of above-mentioned open source literature, need supply with the compressed air with elevated pressures for the air-spray that produces the speed step with hope to pilot jet.Yet, increase the energy consumption that compressed-air actuated pressure only increases air-jet loom.

The present invention aims to provide a kind of pilot jet of air-jet loom that can increase expulsion pressure and improve the directionality of air-spray.

Summary of the invention

The pilot jet of air-jet loom comprises nozzle bore, and described nozzle bore passes the antetheca formation of described pilot jet and has the inner opening of the inside of leading to described pilot jet and the outer opening that leads to the outside of described pilot jet.The axis that extends by the axial centre of described pilot jet along the longitudinal direction of described pilot jet is defined as central axis.And axis that edge perpendicular to the direction of described antetheca extend crossing with described central axis is defined as the wefting insertion axis.The axis that extends through the center of the center of described inner opening and described outer opening is defined as the nozzle bore axis.Described nozzle bore axis is spaced apart angledly with described wefting insertion axis in the horizontal direction.Realize wefting insertion by the compressed air that sprays from described nozzle bore.Being centrally located on the described wefting insertion axis of described inner opening.

As the example explanation description principle of the invention, that carry out by reference to the accompanying drawings, it is clear that other aspects and advantages of the present invention will become from following.

Description of drawings

In claims, set forth the feature of the present invention that is considered to innovate particularly.Can best understand the present invention and purpose and advantage below in conjunction with accompanying drawing to the explanation of current preferred embodiment by reference, in the accompanying drawings:

Fig. 1 illustrates the schematic block diagram that has according to the air-jet loom of the pilot jet of preferred embodiment of the present invention;

Fig. 2 is the cross sectional view that illustrates 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 amplification of the pilot jet of Fig. 2;

Fig. 4 is the cross sectional view along the intercepting of the line A-A among 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 amplification of the pilot jet of Fig. 2, and it has described compressed air flowing in pilot jet.

The specific embodiment

Hereinafter will be referring to figs. 1 to 6 pilot jets of describing according to the air-jet loom of preferred embodiment of the present invention.In Fig. 1, pass through the weft inserting apparatus that

Reference numeral

1 and 2 is indicated air-jet looms and is used for air-jet loom generally respectively.Weft inserting apparatus 2 comprises main burner 3, be arranged on main burner 3 the upstream series nozzle 4 and be arranged on a plurality of 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 be with slay 6 in the reciprocally swing back and forth of the front and back of air-jet loom 1.Series nozzle 4 is fixed in the framework (not shown) of air-jet loom 1 or is fixed in the carriage (not shown) that is 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 all is arranged on series nozzle 4 in addition.Use weft yarn pin (not shown), weft measurement and storage device 9 store and measure that extract out and corresponding to the weft yarn 8 of the predetermined length of braiding fabric width from Weft feeding device 7.

Main valve 10 is connected in main burner 3 by managing 11, so that controllably to main burner 3 supply compressed air.Similarly, series connection valve 12 is connected in series nozzle 4 by managing 13, so that controllably to series nozzle 4 supply compressed air.Main valve 10 and series connection 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 that for example is installed in the weaving mill.Store from the air supplies supply and compressed air be adjusted to setting pressure by master selector 17 in the air tank 16.

Pilot jet 5 is divided into a plurality of groups (only showing two groups in Fig. 1), 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 in air-jet loom 1 in Fig. 1).The auxiliary valve 20 of each group is connected in shared auxiliary air jar 23 by managing 22.Auxiliary air jar 23 is connected in the pipe 26 that is connected master selector 17 and pressure gauge 18 by auxiliary governor 25 with pipe 24.Auxiliary air jar 23 stores from the supply of air supplies (not shown) and compressed air be adjusted to setting pressure by auxiliary governor 25.Auxiliary valve 20 can be operated for the wefting insertion operating period at loom and open in the mode that continues in controlled timing, in order to allow the mode injection air jet of pilot jet 5 to continue of each group.

Main valve 10, series connection 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 in the control signal that activates main valve 10, series connection valve 12 and auxiliary valve 20 under the predetermined crank angle of loom in case wefting insertion to the race of warp thread.

With reference to figure 2, pilot jet 5 and reed 33 are fixed in 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 opposite end.Underframe 36 is fixed in slay 6.Each dent 34 have dewclaw 37, lower claw 38 and be formed on dewclaw 37 and lower claw 38 between U-shaped weft yarn guide opening.A plurality of this weft yarn guide opening cooperate and formation weft yarn guiding channel 39.Simultaneously, each pilot jet 5 is fixed in slay 6.Particularly, the pilot jet retainer 40 that supports pilot jet 5 only shows pair of bolts and nut by the bolt 42 in the groove 41 that is arranged on slay 6 and nut 43(in figure) be anchored on slay 6.Each pilot jet 5 44 places, end thereon passes pilot jet 5 and is formed with nozzle bore 45, and pipe 21(Fig. 1) be connected in the bottom 46 of pilot jet 5.

Hereinafter will describe pilot jet 5 in detail with reference to figure 3 to 5.Pilot jet 5 comprises flat hollow tube, and this flat hollow tube has upper end 44, antetheca 47 and rear wall 48(Fig. 4 of sealing).The flat hollow tube of pilot jet 5 can form by the deep-drawing process.Pilot jet 5 has width H(Fig. 3 and 4) and wherein be formed with the hollow space that serves as air duct 49.As shown in Figure 2, be fixed at pilot jet 5 under the situation of slay 6, smooth antetheca 47 and flat back wall 48 are arranged to be parallel to warp thread, in order to reduce the interference between pilot jet 5 and the warp thread.

Pass antetheca 47 in the position of the upper end 44 of closing on pilot jet 5 and form nozzle bore 45.Can form nozzle bore 45 by discharge or mechanical processing process.Nozzle bore 45 forms the passage of convergent, this passage has circular inner opening 50 and circular outer opening 51, this circular inner opening 50 leads to air duct 49 and has center 50A, and the outer opening 51 of this circle leads to the outside of pilot jet 5 and has center 51A.With reference to figure 3 and 4, extend at the longitudinal direction of pilot jet 5, pilot jet 5 along the axis at the axial centre place of the width H of pilot jet 5 and thickness direction by the X indication and be called central axis, intersect with central axis X and perpendicular to the antetheca 47(of pilot jet 5 or perpendicular to the longitudinal direction of pilot jet 5) the upwardly extending axis in side by the Y indication and be called the wefting insertion axis, and the axis that extends through the center 51A of the center 50A of inner opening 50 and outer opening 51 is indicated by Z and is called the nozzle bore axis.

Nozzle bore 45 forms and makes the center 50A of inner opening 50 be positioned at wefting insertion axis Y upward (with reference to Figure 4 and 5), and nozzle bore axis Z is spaced apart angledly 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, the center 51A of outer opening 51 is spaced apart along width and the wefting insertion axis Y of pilot jet 5.In other words, as shown in Figure 2, be fixed at pilot jet 5 under the situation of slay 6, the center 51A of outer opening 51 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 under the situation of warp thread (not shown), weft yarn guiding channel 39 injection airs that can form towards the weft yarn guide opening by each dent 34 from outer opening 51.

Should be noted that according to the present invention nozzle bore 45 can be formed in the common admissible margin of tolerance, it allows the center 50A of inner opening 50 to be positioned to depart from a little wefting insertion axis Y.

As shown in Figure 5, nozzle bore 45 also forms and makes nozzle bore axis Z in the vertical direction spaced apart angledly with the angle of β degree with wefting insertion axis Y towards the upper end 44 of pilot jet 5.In other words, be fixed at pilot jet 5 under the situation of slay 6, nozzle bore axis Z points to the far-reaching last corner of weft yarn guiding channel 39, as shown in Figure 2, thereby make the power that is caused by air-spray can be effectively applied to warp thread 8, so that warp thread 8 can pass through race effectively.

Nozzle bore 45 also forms the area of feasible outer opening 51 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 that passes nozzle bore 45 outflows is assembled along nozzle-axis Z in interior leg surface 52 by convergent, thereby can improve the injection direction of air-spray.

In Fig. 6, schematically show compressed-air actuated different flow directions in the air duct 49 of pilot jet 5 by dotted arrow.The compressed air that is supplied in the 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.Therefore in pilot jet 5, the center 50A of inner opening 50 is positioned on the wefting insertion axis Y, and in the front view of pilot jet shown in Figure 65, center 50A also is projected on the central axis X, therefore can guide most of high pressure air into nozzle bore 45.

The compressed air of guiding nozzle bore 45 into by the interior leg surface 52 of convergent along nozzle bore axis Z assemble and under high pressure from outer opening 51 along being sprayed by the indicated injection direction T of the bold arrow Fig. 6.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 β angle spaced apart can the improvement towards the directionality of injection direction T of air-spray of introducing the weft yarn 8 of weft yarn guiding channels 39 by main burner 3 angledly.

The present invention is not restricted to preferred embodiment described, but can put into practice the present invention with the following variety of way that is exemplified.

(1) the interior leg surface 52 of the nozzle bore 45 of pilot jet 5 can be extended continuously as straight ground seeing in the cross section (Fig. 4) of pilot jet 5, but bending or warpage by any way, as seeing in the same cross-sectional of pilot jet 5, as long as nozzle bore 45 outside convergents.

(2) nozzle bore 45 can be with constant taper rate convergent, but nozzle bore 45 can be divided into a plurality of zones 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 form and be parallel to nozzle bore axis Z.

(4) be not limited to round-shapedly perpendicular to the cross section of the nozzle bore 45 of the pilot jet 5 of nozzle bore axis Z intercepting, but it can be any other shape of oval, square or star shape for example.

(5) the smooth antetheca 47 of pilot jet 5 and flat back wall 48 can form and be parallel to warp thread, but they can be arranged to tilt with respect to warp thread angledly.

Claims

1. the pilot jet of an air-jet loom comprises:

Nozzle bore, the antetheca that described nozzle bore passes described pilot jet forms, and have the inner opening of the inside of leading to described pilot jet and the outer opening that leads to the outside of 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, and axis that edge perpendicular to the direction of described antetheca extend crossing with described central axis is defined as the wefting insertion axis, the axis that extends through the center of the center of described inner opening and described outer opening is defined as the nozzle bore axis, described nozzle bore axis is spaced apart angledly with described wefting insertion axis in the horizontal direction, realize wefting insertion by the compressed air that sprays from described nozzle bore, it is characterized in that being centrally located on the 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 spaced apart angledly 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 outer 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 is with constant taper rate opening convergent outside described.

5. the pilot jet of air-jet loom according to claim 1 is characterized in that, perpendicular to the rounded shape of cross section of the described nozzle bore of described nozzle bore axis intercepting.