JPH0364613B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention is a two-nozzle type air jet room (hereinafter referred to as AJL) that uses an auxiliary nozzle.
Regarding. The purpose is to provide a two-nozzle AJL that can improve textile quality and weaving efficiency. Up until now, it has been sufficient for AJL to handle the production of so-called standard textiles produced in small lots and in large quantities, but recently it has become necessary to handle high value-added textiles in order to increase the value of the machine. . As a result, there has been a demand for the development of a two-nozzle machine that is capable of mixing and weft insertion of different materials, in addition to the conventional one-nozzle machine. However, AJL's looms have not been in practical use for many years, and even a single-nozzle type loom does not have enough weaving technology accumulated for various yarn types. For this reason, the two-nozzle type is more difficult to weave than the one-nozzle type because it inserts threads that are more difficult to weave than the one-nozzle type, so despite being actively developed by various loom manufacturers, the reality is that it has not yet been put into practical use. . Here, problems when weaving using a two-nozzle type AJL can be broadly classified into the following two types when viewed from a phenomenological perspective. One is that the tips of the weft threads that fly during weaving get tangled and connect to the loom stop without reaching the fabric width, and the other does not connect to the loom itself, but the ends of the weft threads that fly during weaving become entangled and connect to the loom stop. Some of the weft yarns inside the fabric may be uneven or the creases may be uneven, leading to weft knot defects in the finished fabric. In conventional weaving technology, the cause of the flying failure of the two nozzle AJL was thought to be as follows. That is,
Normally, two-nozzle type AJL uses each main nozzle to fly weft yarns with different shapes and characteristics. However, in the conventional two-nozzle specification, it was not possible to adjust the air setting pressures of the two main nozzles separately and independently according to each yarn type. In the end, it was thought that this mechanism was the cause of poor flying performance. The reason why the main nozzle air pressure adjustment of AJL's 2-nozzle type was originally like this comes from the development history of AJL itself, and AJL, including the 1-nozzle type, has many mechanical similarities before it. It started as an imitation of the water jet loom (referred to as WJL) that was developed and put into practical use in
This is because the water injection pressures of the two main nozzles could only be set to be the same. In the case of WJL, the weft transport force of water is strong, so even if there was a slight difference in the form of the yarns entering the two main nozzles, sufficient flying force could be given to both yarns.
In the case of AJL, the air conveying force is weak, so even if the air pressure in the two main nozzles is suitable for one thread, it will be too strong or too weak for the other thread, giving the proper flying force. I couldn't do it. Because of this mechanism, the AJL2 nozzle type was thought to be prone to weft tip entanglement and fabric knot defects. Therefore, as a countermeasure to the above, we improved the air setting pressure of the two main nozzles so that it could be set independently according to each yarn, which resulted in a significant reduction in loom stoppages and improved textile quality. . However, the performance of AJL was not fully demonstrated, and this has led to the fact that the AJL2 nozzle type has not been put into practical use to this day. The present invention is a two-nozzle AJL that solves the above problems.
This is what we are trying to provide. In other words, the present invention was achieved as a result of elucidating various weft yarn flying problems in the two-nozzle type AJL and investigating the functions that the main nozzle and sub nozzles have on weft yarn flying.In the end, the weft yarn conveying force of the two main nozzles This AJL is characterized by the fact that it can be adjusted separately and that air can be supplied to the same sub-nozzle from different systems. We have completed the present invention by discovering that the above problems can be solved by using this AJL. The functions of the main nozzle and sub-nozzles that have been discovered by the present inventor on the weft flight will be described in detail below. Note that the conveyance function will be explained using one nozzle AJL for convenience. Figure 1 shows a typical special reed combination auxiliary nozzle system.
This is a model diagram of AJL. In the figure, a is a weft, b is a weft storage drum, c is a gripper, d is a main nozzle, e is a sub-nozzle, and f is a special reed with thread guiding grooves. The main nozzle d injects pressurized air almost simultaneously when the gripper c is opened, and draws out the weft from the storage drum b into the warp opening of the loom main body. For this purpose, the conveyance force of the main nozzle d must be at least greater than the winding resistance force of the storage drum b. Further, the conveying force of the main nozzle d is required to have the effect of allowing the weft yarns coming out of the main nozzle d to reach the width of the fabric. In other words, a minimum conveying force is required to throw the weft yarn of mass M to the width of the fabric. Sub nozzle e
The action of is to transfer the yarn emitted from the main nozzle d to the next sub-nozzle position in the width direction of the fabric, and there is no conveying force to insert the weft into the air flow jetted from the sub-nozzle itself. That is, weft insertion cannot be performed by stopping the main nozzle d and spraying only the sub nozzle.
In other words, the lower limit of the conveying force of sub nozzle e is the mass M
This is the force required to transfer the weft yarn.If it is smaller than this, the weft yarn will not reach the width of the fabric. The main factor in the conveying force of the main nozzle and sub-nozzle is the injection air pressure. However, if the jet air pressure is increased in order to increase the conveying force, the weft yarns will become loose and weft insertion troubles will easily occur, and the conveying force naturally has an upper limit. Further, the cross-sectional area of the thread guiding groove of the special reed f is constant, and if the amount of flowing air exceeds a limit, the air flow overflows from the thread guiding groove, making the flight of the weft even more unstable. Next, regarding the relationship between the conveying forces of the main nozzle and the sub-nozzle, if the main nozzle is too large, the amount of yarn delivered by the sub-nozzle will not follow the amount of yarn pulled out from the storage drum, causing tangles at the tips of the weft yarns.
On the other hand, if the conveying force of the sub-nozzle is larger, it becomes unbalanced with the feeding amount of the main nozzle, causing the weft yarn to come loose. Therefore, unless an appropriate balance is maintained between the two, weft insertion will not be stable. Note that a similar problem exists in a type that uses a storage pipe instead of a storage drum. By investigating the above weft flying mechanism, we were able to clarify the weft flying problem in the conventional two-nozzle AJL sub-nozzle system. In other words, in the conventional loom specifications of this method, even though the jet air pressure of the main nozzle can be set separately depending on the type of yarn threaded through the two main nozzles, the air pressure of the sub nozzles is adjusted to correspond to the flying of each weft yarn. They were not equipped to make independent adjustments. For this reason, the air pressure in the main nozzle and sub-nozzle was not properly balanced depending on the yarn, which led to various problems with weft yarns flying. The present invention aims to solve the above problems, and its gist is an air jet having two main nozzles that alternately spray different weft yarns, and a sub-nozzle that conveys the sprayed weft yarns in the width direction of the fabric. In the room, the two main nozzles each
It is connected to two pressure air sources that are equipped with pressure regulating valves and can adjust the internal air pressure separately, and the sub nozzles are connected to one or more sub-nozzles as a unit. The air jet room is connected to the main nozzle, and is characterized in that the injection pressure can be set for each sub-nozzle corresponding to the injection of each main nozzle. The present invention will be described in detail below based on examples. Figure 2 shows a mechanical diagram of the typical two-nozzle type AJL. In the figure, 1a, 1
b is the main nozzle, Wa and Wb are 1a, respectively.
This is the weft that enters 1b. 2 is a modified reed having a weft guiding groove 2a in its center. 4a, 4b...4j are sub nozzles arranged on the lace 3 at regular intervals in the width direction of the fabric. In addition, air injection holes 4a-1 and 4b-1 are provided in the portions of the sub-nozzles that are opposite to the yarn guiding grooves of the reeds.
...It has 4j-1. Main nozzle 1a, 1
b, the reed 2, and the sub-nozzles 4a, 4b, . Stays 6 and 7 are installed between the side frames 8 and 8 of the loom, of which the stay 6 has on-off valves 9a, 9b, 10a, 10b...10j as shown in FIG. 3, and the stay 7 has a seventh valve. A replacement valve 11a as shown in the figure,
11b...11j are installed. One of the on-off valves 9a and 9b installed on the stay 6 is connected to the main nozzles 1a and 1b, respectively, by a flexible continuous pipe 9a'9b' shown by a dashed line.
Also, one end of the on-off valve 10a is connected to the sub-nozzle 4a by a continuous pipe 10a', and the on-off valve 10b is connected to the auxiliary nozzle 4b in the same way.
The on-off valve 10j is connected to the auxiliary nozzle 4j. Here, the other ends of the on-off valves 9a and 9b are connected to an air tank 12 by continuous pipes 9a'' and 9b''.
a, 12b. Next, the exchange valve 11a installed on the stay 7 has one end connected to the on-off valve 10a through a continuous pipe 10a'', and the other end divided into two ports, one of which is connected to the air tank 13a through a connecting pipe 11a'. It is connected to an air tank 13b by a continuous pipe 11a''. Similarly, the exchange valve 11b has one end connected to the on-off valve 10b, and one end connected to the air tank 13a, and the other end connected to the air tank 13b.
The exchange valve 11c has one end connected to the on-off valve 10c, one end connected to the air tank 13a, and the other end connected to the air tank 13b, and one end of the exchange valve 11d connected to the on-off valve 1.
One of the other ends is connected to the air tank 13c and the other end is connected to the air tank 13d. Similarly, the replacement valves 11d to 11f have one end connected to the on-off valve 1.
The other end is air tank 13c, 13d between 0d and 10f.
One end of the replacement valves 11g to 11j is the open/close valve 10g to
The exchange valve 11j has one end connected to the on-off valve 10j and the other end connected to the air tanks 13g, 13h. Here, air tanks 12a, 12b, 13
a, 13b to 13h are pressure regulating valves 14a, respectively.
14b, 15a, 15b...15h are connected to a pressure air supply device (not shown) via pressure regulating valves 14a, 14b, 15a, 15b...15h, respectively. Next, the on-off valves 9a, 9b, 10a, 10b...10
cams 18a, 18 fixed to the rotating shaft 16
b, 19a...19j to open and close the exchange valve 11.
a, 11b...11j switch the air tanks to open and close using cams 20a, 20b...20j fixed to the rotating shaft 17. The rotating shafts 16 and 17 are mounted on the side frame 4b so that they rotate once for every two revolutions of the loom when inserting one weft over one weft, and once for every four revolutions of the loom when inserting two wefts. It is set by the combination of gears in boxes 21 and 22. Opening/closing valve 9 for the main nozzle on the rotating shaft 16
On-off valves 10a, 10b for sub nozzles a, 9b...
10j has the same structure. First, the operation of the on-off valve for the sub-nozzle will be explained with reference to FIG. 3 using the on-off valve 10a. The cam 19a fixed to the rotating shaft 16 is for inserting the weft through the weft change, and has two protrusions A and B.
When this contacts the cam roller 10a-1, the valve opens. Here, the protrusion A comes into contact with and acts when the main nozzle 1a is inserting the weft, and the protrusion B acts when the main nozzle 1b is inserting the weft. In addition, in the case of the Futakoshi change, since the rotating shaft 16 rotates once for every four rotations of the loom, the cam shape has four protrusions A1, A2, B1, and B2 as shown in FIG.
Therefore, the protrusions A1 and A2 act when the main nozzle 1a is inserting the weft, and the protrusions B
1 and B2 act when the main nozzle 1b is inserting the weft. Here, the period of action of the cam 19a in FIG.
Since BABE is determined by
3, 19a-4, the protrusions A, A', and B
The operating period can be adjusted arbitrarily by adjusting the angle of alignment of and B′. Next, regarding the on-off valve for the main nozzle, its mechanism is the same as that for the sub-nozzle mentioned above. However, the number of protrusions on the cam is half that of the sub-nozzle because the two main nozzles insert the weft alternately. In FIG. 6, a indicates a main nozzle cam for inserting the weft with a single weft change, and b indicates a main nozzle cam for inserting the weft with a double weft change. Note that when the two cams 18a and 18b for the main nozzle are fixed to the rotating shaft 16, the phase difference is set to be 180°. Next, replacement valves 11a and 11 fixed to the stay 7
The action of b...11j will be explained. All these mechanisms are the same. Therefore, the operation and mechanism of the exchange valve 11a will be explained using FIG. 7. The main body 11a has air passages 41a and 4 that meet at 40a.
2a and 43a are drilled, respectively connecting pipes 10
a″, 11a′, 11a″ and the flow path 42
A valve hole 44a, which intersects at right angles to the intermediate portions of a and 43a and opens to the outside of the main body 11a, is bored. Two small diameter portions 46 are provided in the valve hole 44a.
A rod valve 45a having valves a and 47a is slidably inserted therein. Further, a return spring 48a is added to the end of the rod valve 45a on the valve hole side, and the main body 11
Cam roller 1 is attached to the end of the side protruding outside a.
1a-1 is added. The cam 20a is fixed to the rotating shaft 17 and consists of a projecting portion E and a non-projecting portion F. Note that the ratio of E and F is 180°, which divides the circumference into two equal parts. Here, when the cam roller 11a-1 is in contact with the F portion of the cam, the flow path 43a is opened by the small diameter portion 46a of the rod valve 45a, and the cam roller 11a-1 is in contact with the protruding portion E of the cam. When the valve is closed, the flow path 42a is opened by the small diameter portion 47a of the rod valve 45a.
As a result of the above-described operation, the exchange valve 11a exchanges the air flow path every one rotation of the loom when changing the loom with one loom, and every two rotations of the loom when changing the loom with two looms. Here, the cam 20a
The protruding portion E acts while the main nozzle 1a is inserting the weft, and the F portion acts while the main nozzle 1b is inserting the weft. Therefore, while the main nozzle 1a is inserting the weft, the sub nozzle 4a blows out the pressure in the air tank 13a set by the pressure regulating valve 15a, and while the main nozzle 1b is inserting the weft, the pressure in the air tank 13a is blown out. air tank 1
3b pressure air blows out. Next, the connected main nozzles 1a and 1b are moved up and down parallel to the reed surface by a cam (not shown) depending on the weft insertion time. Fig. 8 shows this, and a shows a state in which the weft is inserted by the nozzle 1a. In this case, the entire main nozzle moves upward, and the tip part 1a of the main nozzle 1a -
1 corresponds to the thread guiding groove 2a of the modified reed. (b) similarly shows a state in which the weft is inserted by the nozzle 1b. In this case, the tip 1b-1 of the nozzle 1b
corresponds to the thread guiding groove 2a of the modified reed. Next, the weaving principle using the two nozzle AJL will be explained. As shown in Fig. 2, two kinds of weft yarns Wa and Wb are inserted alternately, and it is assumed that the weft yarn Wa is inserted first. When it is time to insert the weft yarn Wa, the main nozzle 1a moves to the position shown in FIG. 8a. At the same time, the rotating shaft 17 rotates, and the protrusions of the cams 20a, 20b...20j fixed thereon move to the replacement valve 1.
It contacts the cam rollers 1a, 11b...11j. As a result, during the weft insertion period with the main nozzle 1a, due to the action of the exchange valve, the air tanks 13a, 13c, 13e, 13 set by the pressure regulating valves 15a, 15c, 15e, 15g are supplied to the sub nozzles 4a, 4b...4j.
Supplied by g. The protrusion C of the main nozzle cam 18a comes into contact with the cam roller 9a-1, the on-off valve 9a opens, and the pressurized air set by the control valve 14a blows out from the main nozzle 1a, and the weft Wa of the deformed reed. It jumps out into the thread guiding groove 2a. Next, when the tip of the weft Wa flies close to the sub nozzle 4a, the cam 19a
The protrusion A opens the on-off valve 10a, and the pressure air set for the pressure regulating valve 15a is ejected from the sub-nozzle 4a to convey the weft Wa. The ejection period is at least until the weft Wa reaches the sub-nozzle 4b to be operated next. Next, when the tip of the weft Wa flies close to the sub nozzle 4b, the cam 1
9b, the pressure set by the pressure regulating valve 15a is ejected from the tip of the sub nozzle 4b, and the weft yarn Wa
transport. Similarly, pressurized air is sequentially injected from the sub-nozzles 4c, 4d, . At that time, the air settings are as follows: sub nozzle 4c is pressure regulating valve 15a sub nozzle 4d, 4e, 4f is pressure regulating valve 15c, sub nozzle 4g, 4h, 4i is pressure regulating valve 15e, sub nozzle 4
j is performed with the pressure regulating valve 15g. Next, the tip of the weft yarn Wa reaches the width direction of the fabric and is inserted by the necessary length, and at the same time, the injection of pressurized air from the main nozzle 1a is stopped, and subsequently, the injection of pressurized air from the sub-nozzles is also stopped. After that, the weft Wa is beaten with a reed.
It is woven into cloth. Next, the main nozzle moves, and as shown in FIG. 8b, the main nozzle 1b
is waiting at the weft insertion position. At the same time, the cams 20a, 20b...20j fixed on the rotating shaft 17, which had been in contact with the cam rollers of the exchange valves 11a, 11e...11j at the protruding portions, come into contact with the cam rollers at the normal portions. As a result, during the weft insertion period with the main nozzle 1b, due to the action of the exchange valve, the sub nozzle 4
a, 4b...4j, pressure regulating valves 15b, 15d, 1
The pressure set at 5f and 15h is in the air tank 13.
It is supplied from b, 13d, 13f, and 13g. Next, the protruding part of the cam 18b for the main nozzle 1b comes into contact with the cam roller 9b-1, the on-off valve 9b opens, and the set pressure is ejected from the main nozzle 1b by the pressure regulating valve 14b, and the weft thread Wb jumps out into the thread guiding groove 2a of the deformed reed. Next, when the tip of the weft Wb flies close to the sub nozzle 4a, the cam 19
The protrusion A of a opens the on-off valve 10a, and the pressure air set by the pressure regulating valve 15b is ejected from the sub-nozzle 4a to convey the weft Wb. Note that the ejection period is at least until the weft yarn Wb reaches the sub-nozzle 4b to be operated next. Similarly, the sub nozzle 4 is
Pressurized air is sequentially injected from b, 4c...4j, and the weft is conveyed. In addition, the set pressure of the air at that time is the sub nozzles 4b and 4c, the pressure regulating valve 15b, the sub nozzle 4d,
4e, 4f are pressure regulating valve 15d, sub nozzle 4g, 4
h, 4i are operated by the pressure regulating valve 15f, and the sub nozzle 4j is operated by the pressure regulating valve 15g. Next, the tip of the weft yarn Wb reaches the width direction of the fabric and is inserted by the required length, and at the same time, the air pressure from the main nozzle 1b is stopped, and then the air pressure from the sub nozzles is also stopped. Thereafter, it is reeded and the weft Wb is woven into a woven fabric. As mentioned above, the AJL of this invention has two main nozzles each equipped with a pressure regulating valve and connected to two pressure sources that can independently adjust the internal air pressure, and one or more sub-nozzles in units of multiple sub-nozzles. It is equipped with a pressure regulating valve and is connected to two pressure sources that can separately adjust the internal air pressure, making it possible to set the injection pressure for each sub-nozzle in response to the injection from each main nozzle. Therefore, this
AJL can adjust the air pressure of the sub-nozzles, which work in conjunction with each main nozzle, even when the air pressure settings for the two main nozzles that insert the weft alternately must be set separately depending on the type of yarn. Since the weft conveying force of the main nozzle and sub nozzle can be set in a well-balanced manner. As a result, the weft threads emerging from the two main nozzles are given a very ideal conveying force during their flight. Therefore, this AJL can improve the quality of the fabric and at the same time improve the weaving efficiency. Note that here, "different pressure air sources that can be adjusted separately" are, for example, air tanks equipped with pressure regulating valves as shown in Figure 2, and multiple air tanks supply pressure air from a single pressure air source such as a compressor. However, each air tank can have its own pressure adjusted separately, so it is referred to in this invention as a "different pressure source that can be adjusted separately." Two-nozzle AJL with sub-nozzle system described in this invention
In addition to the modified reed combination type described in the example of the present invention, this also includes an air guide combination type. Also, when the weft is alternately jetted from the two main nozzles, if the two main nozzles are A and B respectively, the order of weft insertion is ABAB...
AABBAABB…AABAAB…ABBABB…including combinations in all cases. The weft conveying force described in the present invention refers to the tension of the weft when air is injected from the nozzle for a yarn with a weft length of 70 cm that protrudes from the main nozzle with the other end fixed, as shown in Figure 8. Normally, the main nozzle It is adjusted by the air setting pressure, but other adjustments can be made by changing the specifications such as the nozzle diameter and length. Example: When weaving a Kyupura rayon Futakoshi de Chine fabric with the following design using AJL, which has two main nozzles and moves the nozzles to insert the weft yarns alternately, the warp yarns are 50 denier, 30 filaments (reeds are 90 wefts). Weft 75 denier 45 filament (Pushing 130 filaments/whale size S twisted yarn (3000T/M) Z twisted yarn (1000T/M) > Weaving by 2 pieces Air setting pressure of the two main nozzles As an example, the air setting pressure of the sub nozzle can be set in conjunction with when each main nozzle operates after setting it separately depending on the type of yarn. When using AJL, and as a comparative example, the air setting of the sub nozzle. The table below compares the operability of each loom and the quality of the finished fabric when using AJL, where the pressure can only be adjusted to a constant value unrelated to the action of the two main nozzles. Ta.

[Table] Thus, it can be seen that the examples are extremely effective in reducing the number of loom stoppages and improving the quality of the fabric.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the main parts showing the structure of a conventional AJL, Fig. 2 is a mechanism diagram showing the structure of the AJL according to the present invention, Fig. 3 is a side view showing the opening/closing mechanism of the on-off valve,
Figure 4 is a plan view of the cam for changing Futakoshi, Figure 5a,
b, c are cam plan views showing the steps of combining four cams to form one cam, Fig. 5 d is a side view of Fig. c, and Figs. A plan view of the two main nozzle cams for overpass changeover, showing the phase difference when the rotating shaft is fixed. Figure 7 is a sectional view showing the exchange mechanism of the exchange valve. Figures 8a and b are movement of the two main nozzles. Figure A is a front view of the main nozzle section when nozzle 1a is inserted, Figure B is a front view of the main nozzle section when nozzle 1b is inserted, and Figures C and D are side views of Figures A and B, respectively. a...Weft, b...Weft storage drum, c...Gripper, d...Main nozzle, e...Sub nozzle, f...Special reed with thread guide groove, 1a, 1b...Main nozzle, Wa, Wb... ...weft, 2...deformed reed,
2a... Thread guiding groove, 3... Lace, 4a, 4b...4
j...Sub nozzle, 4a-1, 4b-1...4j-
1...Air injection hole, 8...Side frame, 5
a, 5b... Slay sword, 6, 7... Stay,
9a, 9b, 10a, 10b...10j...Opening/closing valve, 9a-1, 9b-1, 10a-1, 10b-
1...10j-1...cam roller for on-off valve, 10
a', 10b'...10j'...Connection pipe, 10a'', 1
0b″…10j″…Connection pipe, 11a, 11b…
11j...Replacement valve, 11a-1, 11b-1...1
1j-1...Cam roller for replacement valve, 11a', 1
1b'...11j'...Connection pipe, 11a'', 11b''...
11j''...Connection pipe, 12a, 12b...Air tank for main nozzle, 13a, 13b...13h
...Air tank for sub nozzle, 14a, 14b,
15a, 15b...15h...pressure regulating valve, 16, 17
... Rotating shaft, 18a, 18b, 19a, 19b...
19j...Cam, 20a, 20b...20j...Cam, 21, 22...Change box, 41a,
42b, 43a...air flow path, 44a...valve hole,
45a...Stand valve, 46a, 47a...Small diameter part, 4
8a...Return spring.

Claims (1)

[Claims] 1. In an air jet room that has two main nozzles that alternately inject different weft yarns and a sub-nozzle that conveys the injected weft yarns in the width direction of the fabric, each of the two main nozzles is equipped with a pressure regulating valve and has a separate internal It is connected to two pressure sources that can adjust the air pressure, and each sub-nozzle is connected as a unit of one or more to two pressure sources that are equipped with pressure regulating valves and can adjust the internal air pressure separately. An air jet room characterized in that injection pressure can be set for each sub-nozzle in response to injection from a main nozzle.