KR20030011514A - Weft Inserting Nozzle of Loom of Fluid Jetting Type - Google Patents

Abstract

PURPOSE: To provide a picking nozzle enabling high-speed picking by enhancing jet fluid directivity and thus preventing the jet fluid from scattering and weft convergence from getting poor. CONSTITUTION: This picking nozzle comprises an inner side component having an open hole through which a weft passes and an outer side component inserted with the inner side component and coaxially having with the outer circumferential surface of the inner side component an inner circumferential surface forming together with the outer circumferential surface of the inner side component a circular 1st flow path and a 2nd flow path adjoining the downstream side of the 1st flow path and decreasing in cross-section area toward the downstream side; wherein the downstream end of the 2nd flow path is provided with a jet port through which a high-pressure fluid is jetted, and the inner side and/or outer side of the section corresponding to at least the position of the jet port of the 2nd flow path is of noncircular shape with unit shapes disposed at equiangular intervals around the axis of both the circumferential surfaces.

Description

Weft Inserting Nozzle of Loom of Fluid Jetting Type

Field of invention

The present invention relates to weft injection nozzles used in fluid jet looms such as water jet looms.

Background of the Invention

As one of these types of weft inserting nozzles, a needle having a through hole through which the weft thread penetrates is inserted into the nozzle body in the same axis to form an annular flow path, and a plurality of rectifying walls extending in the axial direction of the nozzle are conformal around the axis line. In the nozzle main body, there are a plurality of inlet holes for arranging commutators provided at an interval between the tip end portions (downstream) of the annular flow paths at intervals around the tip ends of the needles, and for guiding high pressure fluid to the annular flow paths. Patent No. 3120042).

In this prior art, the high pressure fluid is introduced into the annular flow path from the high pressure fluid source and the nozzle holder subsequent to the annular flow path, and is injected from the injection port toward the inclined opening through the space between the needle and the commutator in the annular flow path. The commutator has a plurality of rectifying walls on the upstream side, has rectifying grooves between neighboring rectifying walls, and has an inner circumferential surface of a circular cross section on the upstream side, and forms an injection hole at the downstream end of the inner circumferential surface and the outer circumferential surface of the needle tip. .

The downstream inner circumferential surface of the commutator and the outer circumferential surface of the needle together are downstream, the diameter decreases and the flow path cross-sectional area is reduced, so that the high pressure fluid is tightened and accelerated. . In addition, the high-pressure fluid is divided into a plurality of flows by the rectifying wall, whereby the flows can be prevented from colliding with each other and rectified.

However, in the conventional weft injection nozzle, since the inner circumferential surface and the outer circumferential surface of the fluid injection hole are circular in shape, the high pressure fluid is annularly injected at a uniform speed, and as a result, the injection fluid from the injection hole is easily scattered. In addition to damaging the warp, the penetration speed of the weft is lowered, and the loom cannot be operated at high speed.

It is an object of the present invention to provide a weaving nozzle of a fluid jet loom which increases the directivity of the jetting fluid, prevents the jetting fluid from scattering and deteriorates convergence, and enables high-speed wefting.

The above and other objects of the present invention can be achieved by the present invention described below. Hereinafter, the content of the present invention will be described in detail.

1 is a cross-sectional view showing a first embodiment of the weft injection nozzle according to the present invention.

2 is a cross-sectional view taken along line 2-2 of FIG.

3 is a cross-sectional view showing a second embodiment of the weft injection nozzle according to the present invention.

FIG. 4 is a view of the injection port of the weaving nozzle shown in FIG. 3 and a member around it from the right side.

5 is a cross-sectional view showing a third embodiment of the weft injection nozzle according to the present invention.

FIG. 6 is a view of the injection port of the weaving nozzle shown in FIG.

7 is a cross-sectional view showing a fourth embodiment of the weaving nozzle according to the present invention.

FIG. 8 is a cross-sectional view taken along line 8-8 in FIG.

9 shows another embodiment of the commutator.

Explanation of the main symbols in the drawings

10, 50, 80, 100: weft nozzle

12, 58, 86, 106: needle

14: nozzle body

16, 54, 84, 104, 120: commutator

18: nozzle holder 20: weft

22: through hole 26: first flow path

30: fluid euro 32: annular groove

34: introduction hole

36, 70, 76, 94, 114: rectifying wall

38, 72, 74, 96, 116: rectification groove

40, 60, 88, 108, 122: inner peripheral surface of commutator

42, 64, 92, 112, 124: Second Euro

44, 66, 90, 110: outer peripheral surface of the tip of the needle

46, 52, 82, 102: nozzle

56: ring 62: inner circumference of the ring

The weft injecting nozzle according to the present invention has an inner member having a through hole through which the weft thread passes, and an outer cross-sectional area of the outer member in which the inner member is inserted is connected downstream of the first flow path and the first flow path. And an outer member having an inner circumferential surface on the same axis as the outer circumferential surface that forms a second flow path that decreases by the outer circumferential surface of the inner member. The second flow path has a injection port for injecting a high pressure fluid at a downstream end. At least one of the inner side and the outer side of the cross section corresponding to the position of the injection port of the second flow path is formed in a non-circular shape in which a plurality of unit shapes are arranged at equal angle intervals around the axes of both main surfaces.

The high pressure fluid introduced into the annular first flow path is tightened and accelerated in the second flow path whose flow path cross-sectional area decreases by the downstream side, is released from the pressure state by tightening by the second flow path at the injection port, and is ejected from the injection port as the injection fluid.

The injection port having a non-circular shape in which a plurality of unit shapes are arranged around the axis of both main surfaces at equiangular intervals has a plurality of spaces having the same shape at equiangular intervals in the circumferential direction. Since a large part of the space has a small flow path resistance of the high pressure fluid, the injection fluid is injected at a high speed from that part.

Therefore, the injection fluid has a plurality of high speed portions arranged at equal angle intervals in the circumferential direction, and such high speed portions are injected in an annular bundle state. Therefore, the orientation of the injection fluid is higher than that of the high pressure fluid being annularly injected at a uniform speed as in the prior art, and the convergence of the injection fluid is improved.

Therefore, according to this invention, the damage of the warp resulting from the scattering of injection fluid is suppressed, and high speed weft insertion is attained.

At least one of the inner member and the outer member may have a plurality of rectifying walls formed upstream of the injection port at equal angles with respect to the axes of the two circumferential surfaces. The high-pressure fluid is tightened and accelerated so that the high-speed fluid streams collide with each other and become a turbulent state. However, if a rectifying wall is present, the collision of the high-speed fluid stream is suppressed by the rectifying wall, and the turbulent state is suppressed. Improve.

In a preferred embodiment, the outer member includes an annular member which forms the second flow path together with the inner member in the nozzle body in which the inner member is inserted in the same axis, and in the annular member disposed in the nozzle body. It includes.

In another preferred embodiment, the rectifying wall reaches at least a jet.

1 and 2, the weft injection nozzle 10 includes a needle 12 acting as an inner member, a conventional nozzle body 14 which receives the needle 12 on the same axis, and a nozzle body 14; ) Includes a commutator 16 acting as an annular member disposed on the same shaft. The weft insert nozzle 10 is attached to the nozzle joint 18 in the nozzle main body 14.

The needle 12 has a through hole 22 through which the weft thread 20 passes on the same axis, and the nozzle body 14 is provided by a stopper 24 coupled to the nozzle body 14 from the semi-fluid jetting side. It is fixed to). The outer peripheral surface of the distal end of the needle 12 decreases in diameter toward the distal end, and the upstream side forms an annular first flow path 26 together with the inner peripheral surface of the nozzle body 14.

The nozzle main body 4 is attached in the state which penetrated this to the nozzle joint 18 by the nut 28 couple | bonded from the fluid ejecting side. The nozzle body 14 has an annular groove 32 connected to the fluid flow path 30 of the nozzle joint 18 on its outer circumferential surface, and a plurality of nozzles connecting the annular groove 32 and the first flow path 26. The introduction hole 34 is equidistantly spaced around the axis of the nozzle 10.

The commutator 16 is disposed at the downstream end of the first flow path 26 and further includes a plurality of fins or rectifying walls 36 extending in the axial direction at equal angle intervals around the axial direction of the nozzle 10. Have inside. A rectifying groove 38 (see Fig. 2) is formed between the rectifying walls 36 adjacent to each other in the circumferential direction.

The inner circumferential surface 40 of the commutator 16 forms a second flow passage 42 with the tip outer peripheral surface 44 of the needle 12 having a flow path cross-sectional area reduced by the downstream side to tighten and accelerate the high pressure fluid. Coaxial. The 2nd flow path 42 has the injection port 46 which injects a high pressure fluid from the tightening in the 2nd flow path 42, out of a pressurized state, and injects at the downstream end.

Each rectifying wall 36 is formed over the full length range of the 2nd flow path 42 in an axial direction. For this reason, the downstream cross section which is the location corresponding to the injection port 46 of the commutator 16 is formed in the non-circular shape which arrange | positioned several unit shape at equal angle intervals around an axis line. The needle 12 projects the tip of the needle 12 downstream from the injection port 46.

In the illustrated example, each unit shape is a continuous concave-convex shape such as, for example, the rectifying wall 36 and the rectifying groove 38 adjacent thereto, and the non-circular cross-sectional shape has the same concave-convex shape in the circumferential direction. Are arranged at equiangular intervals. In the example shown in figure, ten rectifying grooves 38 of the same shape are arranged at equiangular intervals around the axis by ten rectifying walls 36 of the same shape.

One or more O-rings 48 are disposed between the needle 12 and the nozzle body 14, and between the nozzle body 14 and the nozzle joint, respectively. In the gas injection device 10, the needle 12 acts as the inner member, and the nozzle body 14 and the commutator 16 act as the outer member.

The high pressure fluid is led from the high pressure fluid source to the annular groove 32 of the nozzle body 14 via the fluid flow path 30 of the nozzle joint 18, and is introduced from the annular groove 32 by the plurality of introduction holes 34. It is led to the annular first flow path 26 and is led from the first flow path 26 to the second flow path 42.

The high pressure fluid introduced into the second flow passage 42 is accelerated by being tightened in the second flow passage 42 in which the flow passage cross-sectional area decreases by the downstream side, and is pressurized away from being tightened by the second flow passage 42 in the injection hole 46. Off, it is injected from the injection port 46 as injection fluid.

The inner circumferential surface portion of the injection hole 46 has a non-circular shape in which a plurality of unit shapes are arranged at equal angle intervals in the circumferential direction, and the inner circumferential surface and the outer circumferential surface of the injection hole 46 are equally angled in the circumferential direction with a plurality of spaces having the same shape. Form at intervals. In such a space, since the flow resistance of the high pressure fluid is small in a large part, the injection fluid is injected at a high speed from that part.

As a result, the injection fluid is formed of a plurality of high-speed parts at equal angle intervals in the circumferential direction, and the high-speed parts are injected in an annular bundle state, so that the high-pressure fluid is annularly injected at a uniform speed. In comparison, the directionality of the injection fluid is increased, the convergence of the injection fluid is improved, whereby the damage of the slope due to the diffusion of the injection fluid is suppressed, and high speed entrainment is possible.

The rectifying wall 36 suppresses the high pressure fluid from becoming a turbulent state before injection, and at the same time forms the high-speed portion of the high pressure fluid in an annular bundle by the rectifying grooves 38 formed between the rectifying walls 36, By reaching 46, the annular bundle state of the high speed portion is maintained up to the injection port 46, and at the same time, the restraint state is maintained.

3 and 4, the weft injection nozzle 50 uses a commutator 54 that does not reach the injection port 52, and the ring 56 is connected to a second flow path (downstream of the commutator 54). 64, and the tip of the needle 58 is projected downstream from the injection port 52 by the distance L1.

The inner circumferential surface 60 of the commutator 54 and the inner circumferential surface 62 of the ring 56 have a truncated conical surface that is smaller in diameter and connected to each other downstream. Thereby, the ring 56 acts as a kind of tightening valve, and the inner circumferential surface 62 of the ring 56 has a second flow path 64 whose flow path cross-sectional area is reduced by the downstream with the tip outer circumferential surface 66 of the needle 58. Together with the ring 56, the high pressure fluid is released from being tightened in the second flow path 64 to be released from the pressurized state, and an injection hole 52 for injecting the high pressure fluid is formed at the lower end thereof.

In addition, the weft injection nozzle 50 also forms a plurality of rectifying walls 70 extending in the axial direction at equal angle intervals in the circumferential direction on the commutator 54, the rectifying groove between the adjacent rectifying wall 70 At the same time, a plurality of rectifying grooves 74 extending in the axial direction are formed on the outer periphery of the distal end of the needle 58 at equal angle intervals in the circumferential direction over the range of the distance L2 from the tip to the upstream, The rectifying wall 76 is formed between the rectifying grooves 74 adjacent to each other.

In the weft injection nozzle 50, the location corresponding to the injection port 52 of the outer peripheral surface of the needle 58 is formed in the non-circular cross-sectional shape which arrange | positioned the unit shape in equilateral phase in the circumferential direction. Also in the example shown in Fig. 4, each unit shape is a continuous concave-convex shape such as, for example, the rectifying groove 74 and the rectifying wall 76 adjacent thereto, and the non-circular cross-sectional shape is surrounded by the same concave-convex shape. Are arranged at equal angle intervals.

In the illustrated example, ten unit shapes each formed by one adjacent rectifying groove and one rectifying wall are arranged at equiangular intervals around the axis. However, it can also be seen that five unit shapes each formed by two rectifying grooves and two rectifying walls are formed at equiangular intervals around the axis. In the weft inserting device 50, the needle 58 acts as the inner member, and the nozzle body 14, the commutator 54, and the ring 56 act as the outer member.

In the weft injection nozzle 50, the high pressure fluid introduced into the second flow path 64 is tightened and accelerated in the second flow path 64 whose flow path cross-sectional area decreases by the downstream side, and is accelerated by the injection port 52 in the second flow path 64. ), It is ejected from the injection hole 52 as an injection fluid. Therefore, also in the said weaving nozzle 50, the same effect | action and effect as the weaving injection nozzle 10 are exhibited.

The rectifying groove 74 and the rectifying wall 76 are preferably formed up to the tip of the needle 58 protruding from the injection port 52 as shown in Fig. 3, but the tip of the needle 58 is formed here. 74 and the rectifying wall 76 may not be formed and may be circular. In this case, the high speed portion of the high pressure fluid is guided by the tip outer peripheral surface of the needle 58 to maintain the high speed. In particular, in the case where the tip outer circumferential surface of the needle 58 is circular, it is preferable to make the diameter dimension of the tip outer circumferential surface of the needle 58 less than or equal to the rectifying groove because it does not prevent the penetration of the high speed portion of the injection fluid.

5 and 6, the weaving nozzle 80 uses a commutator 84 that reaches the injection port 82, and retracts the tip of the needle 86 upward from the downstream end of the commutator 84. The tip position is used as the injection port 82, and the inner circumferential surface 88 of the commutator 84 is a truncated conical surface whose diameter is smaller by the downstream side.

The commutator 84 has the shape which integrated the commutator 54 and the ring 56 in FIG. The inner circumferential surface 88 of the commutator 84 and the outer circumferential surface 90 at the distal end of the needle 86 together form a second flow path 92 whose cross-sectional area is smaller by the downstream side. The injection port 82 injects the high pressure fluid away from the tightening in the second flow path 92.

In addition, the weft injection nozzle 80 forms a plurality of rectifying walls 94 extending in the axial direction at equal angle intervals in the circumferential direction on the inner circumferential surface of the commutator 84, and rectifies between neighboring rectifying walls 94. The groove 96 is used.

As shown in Fig. 6, the outer peripheral surface of the distal end portion of the needle 86 has an equilateral triangle cross-sectional shape in which the corner portion becomes the arcuate portion 98 of the arc over the range of the distance L3 from the distal end, and the unit shape is in phase with the circumferential direction. It is formed in the non-circular shape arrange | positioned. In the example shown in FIG. 6, each unit shape is continuous concave-convex shape like the arcuate top part 98 and this neighboring surface, for example. In the weft injection nozzle 80, the needle 86 acts as the inner member, and the nozzle body 14 and the commutator 84 act as the outer member.

In the weft injection nozzle 80, the high pressure fluid introduced into the second flow path 92 is accelerated by being tightened in the second flow path 92, deviating from the tightening in the injection port 82, and spraying from the injection port 82 into the injection fluid. do. The interval between the inner circumferential surface 88 of the commutator 84 and the outer circumferential surface 90 of the distal end portion of the needle 86 is the smallest at the location of the arcuate crown portion 98 and between the neighboring crown portions 98. It is the maximum. Therefore, also in this weft injection nozzle 80, the same action and effect as the weft injection nozzles 10 and 50 are shown.

7 and 8, the weaving nozzle 100 uses a commutator 104 fitted into the nozzle body 14, and protrudes the tip of the needle 106 from the downstream end of the commutator 104. The inner circumferential surface 108 of the commutator 104 is a truncated conical surface whose diameter is smaller by the downstream side.

The commutator 104 has the shape which integrated the commutator 54 and the ring 56 in FIG. The inner circumferential surface 108 of the commutator 104 and the outer circumferential surface 110 of the distal end portion of the needle 106 together form a second flow path 112 whose cross-sectional area is reduced by the downstream. The injection port 102 injects the high pressure fluid away from the tightening in the second flow path 112.

In addition, the weaving nozzle 100 is formed with a plurality of rectifying walls 114 extending in the axial direction at equal angle intervals in the circumferential direction on the commutator 104, the rectifying groove (between the adjacent rectifying walls 114) ( 116).

As shown in Fig. 8, the inner circumferential surface of the commutator 104 becomes a pentagonal cross-sectional shape in which the edge portion becomes the arcuate top portion 118 over the entire length range, and the non-circular shape in which the unit shape is arranged in the circumferential direction. It is formed in the shape of. In the example shown in FIG. 8, each unit shape is a continuous concave-convex shape like the arcuate top part 118 and this neighboring surface, for example. In the weft injecting device 100, the needle 106 acts as the inner member, and the nozzle body 14 and the commutator 104 act as the outer member.

In the weft injection nozzle 100, the high pressure fluid introduced into the second flow path 110 is tightened and accelerated in the second flow path 110, is released from the tightening in the injection hole 102, and is injected as the injection fluid from the injection hole 102. do. The interval between the inner circumferential surface 108 of the commutator 104 and the outer circumferential surface 110 of the distal end portion of the needle 106 is the smallest at the location of the arcuate cut portion 118 and between the adjacent cut portions 118. Is the maximum at. Therefore, also in this weft injection nozzle 100, the same action and effect as the weft injection nozzles 10, 50, and 80 are exhibited.

In the weft injection nozzle 100, the commutator 120 shown in FIG. 9 may be used. The inner circumferential surface 122 of the commutator 120 and the outer circumferential surface 110 of the distal end portion of the needle 106 together form a second flow path 124 whose cross-sectional area is reduced by the downstream. The injection hole 102 ejects the high pressure fluid from the tightening in the second flow path 124.

In the embodiment shown in Fig. 9, the inner circumferential surface 122 of the commutator 120 has a circular arc-shaped yaw portion 126 over its entire length range, and between adjacent yaw portions. Becomes a hexagonal cross-sectional shape which bulged toward the center, and is formed in the non-circular shape which arrange | positioned the unit shape in equilateral direction in the circumferential direction. In the example shown in FIG. 9, each unit shape is continuous concave-convex shape like the arc-shaped recessed part 126 and its neighboring surface, for example.

In all of the above embodiments, the outer circumferential surface of the needle and the inner circumferential surface of the commutator are radially spaced apart, but the outer circumferential surface of the needle and the inner circumferential surface of the commutator may be partially contacted at least in the injection port portion. In this case, since at least one of the outer circumferential surface of the needle and the inner circumferential surface of the commutator is a non-circular cross-sectional shape, a plurality of spaces for forming the injection fluid in an annular bundle state are formed therebetween.

The present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit thereof.

The present invention has the effect of providing the weft injection nozzle of the fluid jet loom which improves the directionality of the injection fluid, prevents the injection fluid from scattering and deteriorates convergence, and enables high-speed weft insertion.

Simple modifications and variations of the present invention can be readily used by those skilled in the art, and all such variations or modifications can be considered to be included within the scope of the present invention.

Claims (4)

An inner member having a through hole through which the weft thread passes, and a second flow path having a ring-shaped first flow path and downstream of the first flow path and having a flow path cross-sectional area reduced by a downstream side in the outer member into which the inner member is inserted. An outer member having an inner circumferential surface formed together with an outer circumferential surface of the inner member on the same axis as the outer circumferential surface, wherein the second flow path has an injection port for injecting a high pressure fluid at a downstream end thereof, and at least the second flow path. At least one of the inner side and the outer side of the cross section corresponding to the position of the injection port is formed in a non-circular shape in which a plurality of unit shapes are arranged at equal angle intervals around the axis of both main surfaces. Injection nozzle. 2. The at least one of the inner member and the outer member has a plurality of rectifying walls formed upstream of the injection port at equal angles with respect to the axis of the two circumferential surfaces. Weaving nozzles for fluid jet looms. The annular member according to claim 1 or 2, wherein the outer member includes an annular member for forming the second flow path together with the inner member in the nozzle body into which the inner member is inserted and the annular member disposed in the nozzle body. Weaving nozzle of the fluid-jet loom comprising a. The weaving nozzle of claim 2, wherein the rectifying wall reaches at least the injection port.