JPS5951613B2 - Weft insertion device in jet loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a weft insertion device for a jet loom that performs weft insertion by flying a weft yarn into a weft guide space using a fluid, and particularly for an air jet loom that uses air as the fluid.

In order to fly the weft yarn with the fluid ejected from the main nozzle in the jet loom, in order to use the fluid effectively, a tunnel-shaped weft guiding space is formed, and the fluid from the main nozzle is blown into this tunnel-shaped space. BACKGROUND OF THE INVENTION A weft inserting device has been used in the past in which the weft is carried along with the fluid flow.

As is well known, the weft yarn is inserted by flying through the opening of a large number of parallel warp yarns, and then woven by beating the reed, so the weft yarn guiding space can be formed by a continuous wall surface. First, slots are formed in a large number of thin plate-like members inserted between the warp threads, and a large number of slots are arranged in parallel.

This slot must have a shape that allows the weft yarn to escape from the slot after beating or just before beating.

Conventionally, a modified reed type and a guide member type are well known as weft insertion devices that use a large number of thin plate-like members to form such a weft guide space.

The modified reed method uses a modified reed with a large number of bulges that make up the reed, each with a bulge on the front side. form a shaped groove,
A space extending in the weft insertion direction by these continuously parallel grooves is used as a weft guide passage, and a fluid is ejected into this guide passage to guide the weft in the weft insertion direction by the ejected flow. This is a method in which the reed is beaten on the surface that makes up the bottom.

In this type of weft insertion device, in addition to the main nozzle that injects the fluid flow that causes the weft to fly, there is also a It is also known to provide auxiliary nozzles at a required interval on the sleigh, at positions close to the guide passage and out of the way during beating.

The guide member method consists of installing a large number of thin plate-shaped guide pieces in a row on the shed side of the reed separately from the reed, and each guide piece has an opening at the top of the guide piece for a weft outlet. Holes of the same shape or U-shaped grooves of the same shape opening on the side surface of the guide piece are formed at fixed positions in each month, and these continuously parallel holes or grooves extend in the weft insertion direction. This space is used as a weft guide passage, and the row of guide pieces is inserted into the shed at the time of weft insertion, fluid is jetted into the guide passage, and the jet flow guides the weft in the weft insertion direction. This is a method in which the row of guide pieces is ejected from the shed as it moves, thereby performing beating.

Also in this system, it is known to provide an auxiliary nozzle close to the guide passage formed by the hole or groove of the guide piece.

The technical idea common to these conventionally known jet loom weft insertion devices is to provide a groove-like or chemical passage surrounded by the end face of a rigid plate-like body as a weft course, and to insert a main jet into this passage. The purpose is to eject a jet of water, fly the weft along with the jet, and use an auxiliary nozzle in combination to transport the weft in a stable state.

However, in these conventional devices, the flow inside the passage is not uniform and there is a lot of leakage flow outside the passage, so it is not possible to effectively fly the weft yarn. However, there was a problem in that the amount of fluid consumed was large.

A weft inserting device shown in FIG. 1 is a well-known modified weft inserting device using a modified reed.

The figure shows a diagram of its principle. Each of the many exiles 2 that make up the reed 1 has its front side bulging out toward the shed, and the heightwise side of the reed has an opening in the center toward the shed. A groove 4 with a flat bottom 3 is formed, and the grooves 4 of each exile 2 are located in parallel at the same height position and extend in the width direction of the reed 1 (in the direction of the rectangle on the paper in Figure 1). A weft guide passage 5 is configured.

6 is an auxiliary nozzle, which is provided at appropriate intervals;
It is fixed by a mounting jig 8 to the slay 7 that fixes the lower end of the reed 1, and its nozzle hole 9 is located at a position that does not interfere with the beating of the reed by the bottom flat part 3 of the groove 4, and the weft formed by the groove 4 It is opened at a position close to the guide passage 5.

The central axis of the fluid jet from the nozzle hole 9 is directed toward the weft insertion direction, and is set in a direction that intersects the weft insertion direction at an acute angle.

In addition, in the figure, 10 and 10 indicate warp threads, and 11 indicates a woven fabric.

” In a double series device, the weft thread is connected to the main nozzle (not shown).
The thread is inserted into the weft guide passage 5 along with the fluid ejected by the auxiliary nozzle 6, and is conveyed in the weft insertion direction while being propelled by the fluid ejected from the nozzle hole 9 of the auxiliary nozzle 6. Weaving is performed by beating the flat part 3 formed at the bottom of the weaving.

Therefore, during the above-mentioned weft insertion operation, the weft yarn is conveyed in a relatively unrestricted state by the jet stream generated by the main nozzle alone or by the main nozzle and the auxiliary nozzle, so that the stability of the weft insertion can be improved.
From the viewpoint of higher speed weft insertion, it is necessary that the fluid ejected from the main nozzle and the auxiliary nozzle flow stably in the weft guide passage 5 in the weft insertion direction.

However, in reality, the fluid ejected from the main nozzle and the auxiliary nozzle escapes from the weft guide passage 5 to the front or back side of the streamer 2, or leaks vertically between the rows of the streamer 2, and the influence of this leakage is It is known that even a small amount can have a substantial effect on the flight of the weft yarn, and in some cases, it can cause the yarn to fly in an arbitrary direction. It comes into contact with threads and other parts, which increases the flying resistance of the weft yarn and reduces the weft insertion speed, and further causes instability of the weft insertion function, such as weft insertion errors.

Figure 2 schematically shows the air flow near the above-mentioned weft guide passage in the Air Jets I room. Diagram C
FIG. 2 is a cross-sectional top view taken along line 1-1 in FIG.

As is clear from the figure, the airflow from the main nozzle and the auxiliary nozzle flows in the weft insertion direction in the weft guide passage 5 as shown by the arrow, but some of the airflow flows toward the back or front of the flow guide 2, and even towards the weft direction. Leakage occurs along the gap between the two.

In the modified reeding method, the reeding is performed using the flat bottom part 3 of the groove 4 formed in the flow control 2, so when the auxiliary nozzle 6 is provided, the auxiliary nozzle 6 is located below the weft guide path 5 and at the reed. Since the nozzle hole 9 of the auxiliary nozzle 6 is provided at a position that does not damage the surface of the fabric during striking, the central axis of the ejection from the nozzle hole 9 of the auxiliary nozzle 6 is directed upward and near the upper corner of the flat portion 3 of the groove 4.

The fluid ejected from the auxiliary nozzle 6 is blown into the guide passage while being diffused in a substantially conical shape. According to the results of measuring the velocity distribution of the air flow in the weft guide passage, the nozzle of the auxiliary nozzle 6 in FIG. Most of the airflow ejected from the hole 9 is directed towards the back of the weft guide passage 5 as shown by the streamline m, and a part of it leaks to the back of the weft guide passage 5 as shown by the streamline n. Streamline p.

The flow near one wall surface and the lower wall surface of the groove 4 constituting the passage 5 shown by q follows the wall surface and protrudes outside the passage toward the opening of the groove 4, as shown by streamlines r and s. It was found that

The first possible reason for this is that the air flow ejected from the nozzle hole 9 flows into the weft guide passage 5 while diffusing in a substantially conical shape, and the second point is that the air flow forming the weft guide passage 5 This is because the wall surface of the groove 4 of key 2 is formed of a smooth curved surface that opens toward the shed.

According to the above analysis results, in order to achieve stable and high speed weft insertion, it is necessary to stabilize the fluid flow in the weft guide passage, and to reduce fluid consumption as much as possible and efficiently. It can be seen that in order to perform weft insertion, it is effective to reduce the leakage indicated by the streamline n and the external outflow indicated by the streamlines r and s.

Next, a guide member type weft insertion device is a weft insertion device in which, as mentioned above, a guide piece having grooves or holes for guiding the weft is provided on the slay in addition to the reed, and the weft is formed by the grooves or holes. Weft insertion is performed by blowing fluid for conveying the weft into the guide passage.

Many types of weft insertion devices of this type are known, but when classified by the shape of the guide piece, as shown in FIG. As shown in Figure 3C, there is a guide piece 16 with a groove 15 that opens toward the shed, and as shown in Figure 3C, there is a groove that opens toward the opposite side of the shed. Some have a guide piece 18 formed with 17,
Furthermore, when classified according to the fluid handling device that conveys the weft, the following can be classified: i) those that insert the weft using only the main nozzle, and ii)
Weft insertion is carried out by using the main nozzle and a plurality of auxiliary nozzles 19 in combination, 1ii) A negative pressure generating means is provided at the tip in the weft insertion direction in i) or ii) above to suck the weft yarn and weft insertion, etc. There is.

In the guide member type weft insertion device, the weft is propelled in the weft insertion direction by being carried by fluid ejected from the main nozzle or the auxiliary nozzle 19 used in conjunction with the main nozzle, into the weft guide path constituted by the hole 13 or the grooves 15 and 17. When the weft insertion is completed, the guide piece auxiliary nozzle 19 separates from the warp threads 10, 10 during the swinging of the sley 20 that fixes the guide pieces 14, 16 or 18, and the weft threads are removed from the weft threads. Escape through exit 12 and warp 10.10
Reed 2 at the position shown by the dashed line in Figure 3C.
1, the weft yarns are beaten and woven into a woven fabric 11.

Among the guide member type weft insertion devices, those of the type shown in FIGS. 3S and 3C are similar to those of the modified reed type described above, in which fluid flows through the weft guide passage constituted by the grooves 15 and 17. clearly shows the flow of the pattern shown in FIG.

In addition, in the type shown in FIG. 3a, the weft guide passage is constituted by a hole 13 that communicates with the outside through a narrow weft outlet 12, so it is compared to a type in which the weft guide passage is constituted by grooves 15 and 17. The leakage of fluid from the weft guide passage is small overall, but due to the turbulence of the fluid, the weft exit port 12
There is also a danger that the weft threads will be ejected from the weft.

The present inventor, as a co-inventor, aimed to rectify the fluid in the weft guide passage described above in the direction of weft insertion, thereby stabilizing the flying posture of the weft and reducing the amount of fluid consumed. For the purpose of this, as shown in FIGS. 4 and 5, the above-mentioned conventional deformed reed or guide member has irregularities that smoothly connect to the wall surface of the hole or groove constituting the weft guide passage in a plane perpendicular to the weft insertion direction. It was proposed to form a weft guide passage with an uneven wall surface in which surfaces 22 and 23 are formed and uneven surfaces are lined up in the weft insertion direction (Japanese Patent Application No. 54-64441).

According to this invention, the fluid flowing in the weft guide passage is rectified by the uneven wall surface, and the fluid flow leaking from the gap between the guide pieces is prevented, stabilizing the flow and increasing the speed. This has the effect of stabilizing the flight posture and reducing fluid consumption.

However, since the entire wall surface of the slot on one side, each guide piece, or the guide piece is uneven, when the flying weft comes into contact with it, it will cause tension and weft insertion errors. In addition, there were cases where the weft yarn did not come out smoothly from the weft guide path during beating.

In view of the above-mentioned defects of the conventional weft inserting device in the jet loom and the above-mentioned proposal, the present invention has been developed to prevent the weft thread from getting caught during flight while maintaining the rectifying effect of the fluid flowing in the weft guide passage by the uneven wall surface of the above-mentioned proposal. The aim is to prevent weft insertion errors due to weft insertion and weft removal during reed beating. A jet that forms a weft guide passage extending in the weft insertion direction over the entire length of the row of members by providing slots of the same shape at positions, and causes the weft to fly along the passage with fluid ejected from a nozzle to insert the weft. In the room, a part or all of the wall surface of the slot constituting the weft guide passage of each member in the circumferential direction is
The surfaces of the respective members on the upstream side facing the nozzle are connected at an obtuse angle with respect to the weft insertion direction, and the shape of the groove on the member surface of the connection portion is formed to be rich in irregularities. It is connected at an acute angle to the member surface located on the opposite side of the nozzle of each member on the downstream side, and the shape of the groove on the member surface of the connecting portion is a smooth curve or a connection between a curve and a straight line. The wall surface is almost linear in a plane including the weft insertion direction,
In addition, in a plane perpendicular to the weft insertion direction, a smooth curve or a plane where a curve and a straight line connect is constructed.

That is, the weft inserting device for a jet loom of the present invention forms an uneven groove in at least a part of the circumferential wall surface of the slot of each member constituting the weft guide passage, and the depth of four parts of the uneven groove is By making it gradually decrease as it goes downstream in the weft insertion direction and reaching zero at least at the downstream end, in other words, by providing a tapered uneven groove, the flow in the weft guide passage can be rectified by the conventional parallel uneven groove. In addition, by converging and rectifying the flow toward the center of the weft guide path, there is an advantage that the flying posture of the weft can be further stabilized.

In addition, the tapered uneven groove of the present invention converges the flow in the weft guide passage to the center, thereby significantly reducing leakage flow, and forms a strong air flow in the weft insertion direction in the weft guide passage, so that the weft can move at high speed. This realizes flying, prevents the weft from leaving the weft guide path due to leakage flow, prevents resistance to the weft from flying, and saves power.

Further, when the present invention is applied to a guide member constituting a tunnel-type weft guide passage having a slit hole, the present invention provides that the downstream end in the weft insertion direction, which is the minimum inner diameter portion of the slot of each member, has irregularities. Since no groove is formed, the weft yarn in the weft guide path does not get caught in the uneven grooves as in the conventional case during beating, and has the advantage of smoothly coming out from the weft guide path through the slit hole.

Hereinafter, the present invention will be explained based on the drawings.

6 to 11 show an embodiment in which the present invention is implemented in a modified reed type weft insertion device, and the same parts as in FIG. 1 will be described using the same reference numerals.

In Fig. 6, each of the large number of exiles 2 that make up the reed 1 has its front side bulged toward the shed, and its height direction opens toward the shed in the center of the coast, and the bottom part is a flat part 3. The grooves 4 of each of the reeds 2 are arranged in parallel at the same height to form a weft guide passage 5 extending in the width direction of the reed 1 (in the direction perpendicular to the plane of the paper in the figure). As in FIG. 1, the reed 1 is fixed to the slay 7 at its lower end.

The feature of this embodiment is that the remaining wall surfaces of the groove 4 excluding the bottom flat part 3 which will become the beating surface, that is, the upper and lower wall surfaces 24, 24 of the groove 4, are It connects at an obtuse angle with the exile surface on the side facing the main nozzle (the surface above the surface of the paper in Figure 5) with respect to the vertically downward direction from It is formed into a curved line, and is connected at an acute angle to the exile surface located on the opposite side of the main nozzle (the lower surface of the paper in Figure 5), and the ridge line 26 connected to the surface is formed into a smooth straight line without unevenness. do.

The wall surface 24 surrounded by the ridge lines 25 and 26 constitutes a surface that is connected almost linearly in a plane including the weft insertion direction, and with a smooth curve or straight line in a plane perpendicular to the weft insertion direction. .

FIG. 7 is an enlarged side view of the trench 4 portion of the exile 2, and FIG. 8 is a partially enlarged partial slope view of the wall surface 24, showing the ridge lines 25 and 26 in detail. Ridge line 25.
The wall surface 24 between 26 and 26 has a plurality of groove-like uneven surfaces arranged along the circumference of the groove 4 on the wall surface connected to the ridge line 25, and these groove-like uneven surfaces gradually increase in depth as they approach the ridge line 26. It shows a shape that decreases and finally becomes the same plane and connects to the ridge line 26.

Figures 10 and 11 are ■■-II in Figure 8.
3A and 3B are cross-sectional side views taken along line III-III, respectively.

FIG. 9 is a partial front view of the reed 1, and since the wall surface 24 of the groove 4 is formed as described above, the wall surface 24 has a cross section of the groove 4 that gradually narrows in the weft insertion direction shown by arrow A. This will form a diagonal surface of the shape.

Therefore, the fluid flowing through the weft guide path 5 surrounded by the wall surface 24 having the above-mentioned shape is urged toward the center of the weft guide path 5 by the inclination of the wall surface 24, and the fluid flowing through the weft guide path 5 surrounded by the wall surface 24 having the above-mentioned shape is urged toward the center of the weft yarn guide path 5 by the inclination of the wall surface 24. The flow is rectified by the row of groove-like uneven surfaces, resulting in a directional flow along the weft insertion direction A.

Therefore, the fluid flowing through the weft guide passage 5 has a significantly reduced leakage flow from the gaps in the weft 2 and the openings of the grooves 5, and flows stably through the weft guide passage, so that the posture of the weft carried with the fluid is significantly changed. This increases stability.

In particular, in the present invention, the groove-like uneven surface that rectifies the fluid flow in the weft guide passage 5 is located on the upstream side of the wall surface 24 constituting the weft guide passage 5 in the weft insertion direction, so that the fluid flows from the upstream side. Immediately converges and rectifies fluid flow,
The swirling component of the flow is reduced to flow out from the ridge line 26, and the groove-like uneven surface on the downstream side of the wall surface 24 is gradually flattened and connected to the ridge line 26 formed by a smooth curve, a straight line, or a combination line of a curve and a straight line. Therefore, the weft is temporarily placed on the wall surface 2.
Even if the weft yarn comes into contact with the weft yarn, the weft yarn is flown smoothly on the fluid flow and does not create a large resistance, thereby significantly stabilizing the flying posture of the weft yarn.

In particular, the auxiliary nozzle 6 is attached to the sleigh 7 to which the lower end of the reed 1 is fixed, using a mounting jig 8, and the nozzle hole 9 of the auxiliary nozzle 6 is
When the nozzle hole 9 is directed so that its axis is directed in the weft insertion direction and intersects the weft insertion direction at an acute angle, the jet from the nozzle hole 9 is ejected into the weft guide passage 5 constituted by the wall surface 24. The flow direction of the fluid supplied from the nozzle hole 9 of the auxiliary nozzle 6 is regulated by the row of groove-like uneven surfaces on the upstream side of the wall surface 24, and the flow flowing out from the opening of the groove 4 to the outside is significantly reduced. urge

FIG. 9 schematically shows the flow of fluid when fluid is supplied from the nozzle hole of the auxiliary nozzle 6.

In addition, in the embodiment described above, the contact point between the surface of the exile 2 on the upstream side in the weft insertion direction A, that is, the side facing the main nozzle and the wall surface 24 was described as a clear ridge line 25 forming an obtuse angle.
In the present invention, the connecting portion between the penetrating surface corresponding to the ridge line 25 and the wall surface 24 may be formed into a curve in which the wall surface 24 gradually decreases in radius to smoothly connect with the penetrating surface on the upstream side in the weft insertion direction. good.

The ridgeline 26, which is the connection point between the downstream surface in the weft insertion direction and the wall surface 24, is preferably a ridgeline where the surface and the wall surface 24 intersect at an acute angle.

FIGS. 12, 13, and 14 show examples in which the present invention is implemented in different types of guide member type weft insertion devices, respectively.

Note that the same reference numerals in these figures as in FIG. 3 indicate the same parts.

The embodiment shown in FIG. 12 has a reed 21 on the sleigh 20,
A large number of thin plate-like guide pieces 16 are arranged in a row on the shed side of the reed 21, and U-shaped grooves 15 that open toward the shed side are formed in the guide pieces at fixed positions in each month. An auxiliary nozzle 19 is suitably disposed close to the opening, and the fluid flow ejected from the main jet and the auxiliary nozzle 19 guides the weft into the weft guide path 5 formed by the grooves 15 of the guide pieces 16 that are continuously arranged in parallel. In the type of flying type, the guide piece 1
The wall surface 31 of the groove 15 of No. 6 is enlarged in FIG. 15 and has a shape that will be described later.

The embodiment shown in FIG. 13 has a reed 21 on the sleigh 20,
A large number of guide pieces 18 are arranged in a row on the shed side of the reed 21, and U-shaped grooves 17 that open toward the stream side are formed in the guide pieces 18 at fixed positions in each month. Auxiliary nozzles 19 are appropriately arranged in close proximity, and the fluid flow ejected from the main jet and the auxiliary nozzles 19 causes the guide pieces 1 to be continuously arranged in parallel.
In the type in which the weft is allowed to fly through the weft guide passage 5 formed by the grooves 17 of 8, the wall surface 32 of the guide piece 18 extends over the entire circumference of the groove 17, and its wall surface 32 is shown enlarged in FIG. 16 and has a shape that will be described later. That is.

Since the guide pieces 16 and 18 shown in FIGS. 15 and 16 are symmetrical in shape, they will be explained together.

The wall surface 31.32 extending over the entire circumference of the grooves 15, 17 of each guide piece 16.18 is the guide piece surface ( The ridgeline 33° 34 connected to this surface is formed into a smooth curve with many unevenness, and is located on the opposite side from the main nozzle on the downstream side in the weft insertion direction. It is connected at an acute angle to the surface of the guide piece (the surface on the lower side with respect to the plane of the paper in the figure), and the ridge lines 35 and 36 connected to the surface are mainly straight lines, and the connecting portions are connected smoothly with curves.

The wall surfaces 31 and 32 surrounded by the ridge lines 33, 34 and 35, 36 are almost straight in a plane including the weft insertion direction, and have smooth uneven curves or curves in a plane perpendicular to the weft insertion direction. Construct faces connected by straight lines.

In these embodiments, the fluid flow from the main nozzle and the auxiliary nozzle 19 causes the weft to fly through the weft guide passages 5, 5 formed by the wall surfaces 31, 32 of the grooves 15, 17 of the guide pieces 16, 18. In doing so, the fluid flow is focused and rectified to reduce the leakage flow from the gaps between the guide pieces, similar to the weft guide passage formed by the grooves formed in the modified version,
In addition, it is possible to reduce the swirling component of the flow and stabilize the flying posture of the weft yarn.

The embodiment shown in FIG. 14 has a reed 21 on the sleigh 20,
A large number of thin plate-shaped guide pieces 14 are arranged in a row on the shed side of the reed 21, and holes 13 for opening the weft outlet 12 on the reed 21 side are formed in the guide pieces 14 at fixed positions for each month. In a type of weft yarn guide passage 5 constituted by a hole 13 in which a fluid flow from a main nozzle causes the weft yarn to fly, the wall surface 37 of the hole 13 of the guide piece 14 is formed as shown in FIGS. 17 to 20. It was formed.

That is, the wall surface 37 is the surface of the guide piece facing the main nozzle on the upstream side with respect to the weft insertion direction (the direction vertically downward from the top of the paper in FIGS. 14 and 17) (the surface above the paper in the figures). At the same time, the ridge line 38 connected to the surface is formed into a smooth curve with many unevenness, and the guide piece surface located on the opposite side from the main nozzle on the downstream side in the weft insertion direction (with respect to the paper surface in the same figure). lower surface)
and the ridge line 3 that connects with the surface at an acute angle and connects with the surface.
9 is connected by a smooth curve with no unevenness.

The wall surface 37 surrounded by the ridge lines 38 and 39 is connected almost linearly in a plane including the weft insertion direction (arrow A), and by a smooth uneven curve in a plane perpendicular to the weft insertion direction. Construct the surface.

It is particularly preferable that the ridge line 38 in the vicinity of the weft outlet is serrated.

18 is a cross-sectional top view of the main part of the parallel guide pieces 14, 14 taken along a plane including the weft insertion direction, that is, along the line IV--IV in FIG. This shows that the area changes linearly, being widest on the upstream side in the weft insertion direction and narrowing towards the downstream side.
19 and 20 are diagrams showing cross-sectional shapes taken along the v-v line and the VI-VI line in FIG. 18, respectively, and show the hole 1
The cross-sectional shapes of Nos. 3 to 3 show that the upstream side in the weft insertion direction has deep unevenness, and the downstream side has shallow unevenness.

Thus, the upstream side of the wall surface 37 of the hole 13 in the weft insertion direction is the ridge line 3.
The part 8 has the largest number of irregularities and forms a deep groove-like uneven surface, and these groove-like uneven surfaces gradually become shallower as they approach the downstream side in the weft insertion direction, and finally become flat and smooth. It has a shape that forms a round surface and connects to the ridge line 39.

When a jet flow from the main jet is caused to flow into the weft guide passage 5 constituted by the wall surface 37 formed on such an uneven surface, the fluid flow is rectified in the weft insertion direction A by the row of deep grooves of the unevenness near the ridgeline 38 of the wall surface 37. , and a directional flow with reduced swirl flow, which reduces the leakage flow from between the guide pieces 14 and stabilizes the attitude of the weft yarn flying together with the jet flow of the main jet.

Furthermore, since the ridgeline 39 on the downstream side in the weft insertion direction is formed into a smooth curve with no irregularities, even if the weft comes into contact with the guide piece 14, the guide piece 14 will not provide a large resistance and the fluid will flow smoothly. Since the weft flies while riding on the ground, the flying posture of the weft threads is made to be comfortable and stable.

In addition, when the weft guide passage 5 is constituted by the guide piece 14 in which a hole 13 communicating with the outside is formed by the weft outlet 12 of the type shown in FIGS. 14 and 17,
Compared to the weft guide passage formed by a guide piece 16.18 of the type having a groove 15.17 with a large opening as shown in FIG. 16, the leakage flow from the opening of the groove 15.17 is large. However, on the other hand, there is a risk of the weft being pushed out by the fluid leaking from the weft outlet 12 of the guide piece 14, and in this embodiment, the weft By imparting directionality to the fluid flow flowing through the guide passage 5 and rectifying it, the above-mentioned danger is significantly reduced.

FIG. 21 shows a modification of the guide piece 14 shown in FIG. 17. In this modification, the guide piece 40 has a ridge line 41 on the surface of the weft weft piece on the upstream side in the weft insertion direction, which has serrated irregularities only near the weft outlet 12. The remaining majority is a smooth curve.

According to this modification, the wall surface 37 constituting the weft guide passage has an uneven surface formed only in the vicinity of the weft outlet 12, so that the fluid flowing through the weft guide passage can flow through the wall surface 37 with a cross-sectional shape narrowing in the weft insertion direction. This reduces turbulence caused by leakage flow, and a groove-like uneven surface is formed near the weft outlet 2 to straighten the fluid flow, thereby preventing the weft from protruding from the weft outlet 12. It has the effect of

Also, in the modified guide piece 42 shown in FIG. 22, does the ridge line 43 connecting the upstream surface in the weft insertion direction and the wall surface 37 have exactly the same shape as the ridge line 38 of the guide piece 4 shown in FIG. 17? The ridge line 44 connecting the surface on the downstream side in the weft insertion direction and the wall surface 37 is connected to the wall surface 37 at a position approximately symmetrical to the weft outlet 12.
The wall surface portion 45 is formed into a curved line with many irregularities by a slight distance, and a row of grooves with deep irregularities oriented in the weft insertion direction is formed in the wall surface portion 45, so that the fluid flow flowing through the weft guide path is directed to the wall surface portion 4.
The groove array No. 5 is intended to impart strong directionality, and to avoid giving unnecessary resistance to the weft yarn when it escapes from the weft outlet 12 for beating.

FIG. 23 shows a guide piece shown in FIG. 17 in which the linear part forming the weft outlet is removed and a wall surface 37' similar to the wall surface shown in FIG. 17 is formed on the inner periphery of the arc-shaped part. 46, and the wall surface 37' is the guide piece 46.
ridge line 38' connecting to the upstream and downstream sides in the weft insertion direction.
, 39' have the same shape as the ridge lines 38 and 39 of the guide piece 14 in FIG.

The guide pieces 46 are arranged in parallel on the sleigh, with one guide piece 46 inserted every few guide pieces 14 in FIG. 17, and the opening of the guide piece 46 is connected to a fluid source. A cylindrical auxiliary nozzle 47 is placed upright on the sleigh so as to face each other.

FIG. 24 shows FIG. 23 VII-
It is a cross-sectional top view of the main part taken along the line VII, and the nozzle 48 of the auxiliary nozzle 47 has its main fluid jetting direction directed toward the weft insertion direction and in a direction that intersects the weft insertion direction at an acute angle. As shown, the auxiliary fluid is ejected into the weft guide passage.

Figure 25 shows the ridgeline 38.3 of the guide piece 14 shown in Figure 17.
9 and the wall surface 37 surrounded by these ridge lines 38 and 39 are modified guide pieces 49 formed in the same shape,
A fluid passage 50 for communicating a fluid source inside the body is formed in the guide piece 49 along the wall surface 37 of the hole 13, and on the other hand, a weft thread is formed near the ridge line 39 on the downstream surface of the four guide pieces in the weft insertion direction. A large number of nozzle ports 51 are opened in a direction facing the guide path and perpendicular to the weft insertion direction, and these nozzle ports 51 are communicated with the fluid path 50.

FIG. 26 is a cross-sectional view of the main parts along the line Vllll-VIII in FIG.
It shows the relationship between

The guide piece 14 shown in FIG. 17 is the guide piece 49 of this embodiment.
In combination with this guide piece 4 for every few guide pieces 14.
When one guide piece 9 is inserted and arranged in parallel on the slay and the fluid passage 50 is connected to a fluid source, all the guide pieces arranged in parallel on the slay have almost the same shape, and the auxiliary fluid is connected to the appropriate one. The guide pieces can be added to the weft guide path at intervals.

In addition, in the guide pieces shown in FIGS. 17 to 26,
Clear ridge lines 38, 38', 41, 41, and 38' forming an obtuse angle connect the guide piece surface facing upstream with respect to the weft insertion direction and the wall surface.
43, but as in the case of the modified reed, the connecting portion between the guide piece surface and the wall surface corresponding to the ridge line is formed into a curve in which the wall surfaces 37 and 37' gradually decrease in radius, and the connecting portion is formed in the upstream direction in the weft insertion direction. It may be connected to the surface of the side guide piece.

As described above based on the respective embodiments, the present invention provides a weft inserting device using a modified reed type, in which the reed is made up of a thin plate-like member, and a weft inserting device using a guide member type, in which the reed is made up of a thin plate-like member. For this purpose, guide pieces provided separately from the reed are used, and grooves or holes of the same shape are formed at predetermined height positions respectively, and the grooves or holes of these exile or guide pieces arranged in parallel on the slay are used to In a device constituting a weft guide passage extending in the weft insertion direction, part or all of the wall surface of the groove or hole constituting the weft guide passage of each member in the circumferential direction is connected to the surface of each member on the upstream side with respect to the weft insertion direction. At the same time, the groove shape on the member surface of the connection part is formed in a shape rich in unevenness, and it connects at an acute angle with the member surface on the downstream side in the weft insertion direction, The shape of the slot on the surface is a smooth, smooth curve or straight line, or a combination thereof, and the wall surface is approximately straight in a plane that includes the weft insertion direction, and is approximately straight in a plane that is perpendicular to the weft insertion direction. Since it is formed by surfaces that connect with smooth curves, the fluid flowing through the weft guide path reduces the outward flow on the inclined wall surface, and the fluid flow is directed in the weft insertion direction on the uneven surface. By rectifying the flow in the opposite direction, the flow that tends to leak to the outside through the gaps between each member or the openings of the slots is reduced, and the swirling flow is also reduced, thereby stabilizing and increasing the speed of the flow within the weft guide passage. The aim is to achieve this, stabilize the flying posture of the weft threads, and eliminate weft insertion errors.

In particular, in the present invention, the portion where the wall surface connects with the surface of each member on the upstream side in the weft insertion direction is connected at an obtuse angle with a sawtooth-like curve rich in irregularities, and the surface on the downstream side in the weft insertion direction is connected at an obtuse angle. Since the connecting part is connected at an acute angle with a smooth curve or straight line without unevenness, the uneven surface that rectifies the fluid flow has the deepest unevenness depth on the upstream side of the wall surface in the weft insertion direction, and the depth of the unevenness is the deepest on the upstream side of the wall surface At the same time, the depth of the unevenness on the downstream side of the wall surface in the weft insertion direction is gradually reduced, and at the end of the wall surface, the uneven surface disappears and the surface becomes a flat smooth line. Therefore, even if the weft thread were to come into contact with the wall surface during flight, there would not be much resistance, reducing the risk of weft insertion errors such as bending of the weft thread.

In the present invention, the curved line with many irregularities that connects to the surface of the member on the upstream side in the weft insertion direction of the wall surface is defined as the opening, that is, the opening of the groove in the case of a modified reed method, or the guide piece of the guide member method. In some cases, the depth of the uneven surface of the wall near the opening becomes particularly deep by forming a curve with many sawtooth irregularities protruding in the direction of the opening in the vicinity of the connection with the weft outlet. Since the rectifying effect of the portion is excellent, it is extremely effective in reducing the leakage flow from the opening and preventing the weft from flying out.

In the present invention, the combined use of an auxiliary nozzle or a member having a nozzle opening is a preferable embodiment because it allows the weft to fly without reducing the flow velocity of the fluid flow in the weft guide passage.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a conventional modified reed type weft insertion device, Fig. 2 a, l), and c are schematic diagrams showing the air flow near the weft guide passage of the device, and Fig. 3 a ,
l) and c are schematic diagrams showing various types of conventionally used guide member type weft inserting devices, and Figures 4 and 5 are diagrams of a modified reed and a guide member jointly proposed by the present inventors, respectively. A side view showing an example, FIG. 6 is a schematic diagram of an embodiment in which the present invention is implemented in a modified reed type weft insertion device, FIG. 7 is a side view of the main part of the exile, and FIG. 9 is a partial front view of the reed of this embodiment, and FIGS. 10 and 11 are taken along lines II-II and III-II in FIG. 8.
A cross-sectional side view taken along line I, FIGS. 12 to 14 are schematic diagrams of embodiments in which the present invention is implemented in various types of guide member type weft insertion devices, and FIG. 15 is an enlarged view of the guide piece in FIG. 12. A side view, FIG. 16 is an enlarged side view of the guide piece in FIG. 13,
FIG. 17 is an enlarged side view of the guide piece in FIG. 14, and FIG. 18 is FIG. 17 IV of the guide member in the embodiment of FIG. 14.
- Main part cross-sectional top view along line IV, Figures 19 and 20
The figures are cross-sectional diagrams taken along the lines ■-V and v■-■■ in FIG. 18, FIGS. 21 and 22 are side views of a modification of the guide piece shown in FIG. 17, and FIG. A side view of a deformed guide piece used in combination with the guide piece shown in the figure, FIG. 24 is a side view of a guide member used in combination with the guide piece shown in FIG. 25 is a side view of a deformed guide piece having a fluid passage used in conjunction with the guide piece of FIG. 17, and FIG. 26 is a sectional view taken along the line Vllll-Vllll of FIG. 25, respectively. be. In the figure, 2 is the exile of the deformed reed, 4 is the groove formed in the exile,
24 is a wall surface of the groove; 25 is a ridge line where the wall surface connects with the surface on the upstream side in the weft insertion direction; 26 is a ridge line where the wall surface is connected with the surface on the downstream side in the weft insertion direction; 14. 16.
18. 40. 42. 46.49 is a guide piece of the guide member, 15 is a groove formed in the guide piece, 31.32 is a wall surface of the groove, and 33.34 is a ridge line where the wall surface of the groove connects with the surface of the guide piece on the upstream side in the weft insertion direction. , 35 and 36 are ridge lines where the wall surface of the groove connects with the surface of the guide piece on the downstream side in the weft insertion direction;
37 is a hole formed in the guide piece, 38, 38', 41, 4
3 is a ridgeline where the wall surface of the hole connects with the surface of the guide piece on the upstream side in the weft insertion direction; 39, 39'44 is a ridgeline where the wall surface of the hole connects with the surface of the guide piece on the downstream side in the weft insertion direction; 6 and 47 are ridgelines where the wall surface of the hole connects with the surface of the guide piece on the downstream side in the weft insertion direction The auxiliary nozzles are shown respectively.

Claims (1)

[Claims] 1. A large number of thin plate-like members are planted in rows on a sleigh, and slots of the same shape are provided at the same positions in the large number of thin plate-like members, and weft insertion is carried out over the entire length of the row of members. In the jet loom, which constitutes a weft guide passage extending in the direction of the weft guide passage and performs weft insertion by causing the weft to fly along with fluid ejected from a nozzle into the passage, Part or all of the circumferential direction is connected at an obtuse angle to the surface of each member on the upstream side facing the nozzle in the weft insertion direction, and the shape of the groove on the member surface of the connecting portion is uneven. The grooves are formed so as to be rich in pores, and are connected at an acute angle to the surface of each member located on the opposite side of the nozzle on the downstream side in the weft insertion direction, and the shape of the groove on the surface of the member at the connection portion is uneven. The wall surface is formed into a smooth curve or a connection between a curve and a straight line, and the wall surface has a surface that connects almost straight in a plane including the weft insertion direction and with a smooth curve in a plane perpendicular to the weft insertion direction. A weft insertion device in a jet loom, characterized by comprising: 2. The surface of each member on the side facing the nozzle on the upstream side with respect to the weft insertion direction and the wall surface constituting the weft guide passage of the slot are connected to form an obtuse ridgeline, and the ridgeline is The surface of the member is a curved line with many irregularities, and the surface of the member located on the downstream side opposite to the nozzle with respect to the weft insertion direction of each member and the wall surface constituting the weft guide passage of the slot are at an acute angle. They are connected to form a ridge line, and the ridge line is a smooth curve on the surface of the member, and the wall surface constituting the weft guide passage of the slot in each member is one side in a plane including the weft insertion direction. The wefting device in a jet loom according to claim 1, wherein the wefting device in a jet loom is connected almost linearly from one ridgeline to the other ridgeline, and connected by a smooth curve in a plane perpendicular to the weft insertion direction. . 3. The thin plate-like members arranged and planted on the sley are sleds, and the groove is formed in the shape of a groove that opens toward the shed on the front side of the sled, and forms the bottom of the groove. The weft insertion device in a jet loom according to claim 1, characterized in that the weft insertion device performs beating with a surface. 4. The weft insertion device for a jet loom according to claim 1, wherein the thin plate-shaped members arranged and planted on the sled are guide pieces provided separately from the reed. 5 An auxiliary nozzle that opens in a position close to the slot of the thin plate-like member arranged and planted on the slay is provided at an appropriate interval apart from the main nozzle, and the main direction of fluid ejection of the auxiliary nozzle is set in the latitudinal direction. 5. A weft insertion device for a jet loom according to any one of claims 1 to 4, characterized in that the weft insertion device faces the weft insertion direction and intersects the weft insertion direction at an acute angle. 6. An auxiliary nozzle hole is opened in one or a plurality of surfaces of the thin plate-like member located at appropriate intervals at a position close to the slot of the member, and the auxiliary nozzle hole is formed inside the member. The main direction of fluid ejection from the auxiliary nozzle hole is directed toward the weft insertion direction and intersects the weft insertion direction at an acute angle. A weft insertion device in a jet loom according to any one of items 1 to 4.