JP3572770B2 - Pneumatic yarn splicing device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pneumatic yarn splicing device in which one yarn end and the other yarn end are connected by pneumatic force, and particularly to a yarn splicing device in which characteristics of yarn ends to be spliced are not always the same. The present invention relates to a pneumatic yarn splicing device suitable for a pneumatic yarn joining device.
[0002]
[Prior art]
As a pneumatic yarn splicing device, a first untwisting nozzle that untwists one yarn end by air force, a second untwisting nozzle that untwists the other yarn end by air force, and both yarn ends after untwisting And a yarn splicing nozzle for tangling yarns by air pressure (Japanese Patent Publication No. Sho 62-3742).
[0003]
According to this pneumatic yarn splicing device, both yarn ends where fibers are untwisted and loosened by the air pressure of the first and second untwisting nozzles are guided to the yarn splicing nozzle by a yarn holding lever or the like, and It is swirled by the air pressure supplied to the piecing nozzle, entangled and spliced.
[0004]
[Problems to be solved by the invention]
By the way, there is known a yarn processing system (Japanese Patent Publication No. 1-56172, etc.) in which different kinds of yarns are selectively connected as appropriate. When the above-mentioned pneumatic yarn splicing device is used to select and connect yarns different from each other as appropriate, the following problems occur.
[0005]
That is, if the characteristics (type, count, yarn color, etc.) of the yarn to be connected are different, the ease of untwisting of the yarn is different, so to obtain an appropriate untwisted state and form a good seam, The air pressure of the untwisting nozzle must be changed each time. However, in the conventional pneumatic yarn splicing device, since the air pressure of the untwisting nozzle was fixed, it was not possible to cope with changes in the yarn type, yarn count, yarn color, and the like, and it was not possible to obtain a good seam. The reason that the ease of untwisting differs depending on the yarn color is that the adhesive force of the fiber paste differs for each color.
[0006]
Similarly, in the case of the yarn splicing nozzle, similarly, since the air pressure is conventionally fixed, if the characteristics of the yarn end to be spliced are different, it is not possible to obtain an appropriate twist splicing state and form a good seam. There was a problem.
[0007]
[Means for Solving the Problems]
The first invention invented in consideration of the above circumstances, a first untwisting nozzle for untwisting one yarn end, a second untwisting nozzle for untwisting the other yarn end, In a pneumatic yarn splicing device having a yarn splicing nozzle for tangling both yarn ends, a untwisting air force for changing the air force of each nozzle independently to the first and second untwisting nozzles It is provided with a change means. Accordingly, even if the characteristics (yarn type, count, yarn color, etc.) of one yarn end and the other yarn end are different, the air force of the first and second untwisting nozzles is changed by the untwisting air force changing means. By appropriately and independently changing each of them, an appropriate untwisted state can be obtained at both yarn ends, and a good seam can be formed.
[0008]
Further, there is provided untwisting characteristic determining means for determining the characteristic of the yarn end to be untwisted, and the untwisting air force changing means changes the air force according to the determination result of the untwisting characteristic determining means. Is also good. Thereby, even if the characteristics of the yarn end to be untwisted are changed between one yarn end and the other yarn end, a proper untwisted state can always be obtained, and a good seam is always formed. can do.
[0009]
Further, the yarn splicing nozzle is provided with yarn splicing air force changing means for changing an air force for splicing, and yarn splicing characteristic determining means for judging characteristics of a yarn end to be spliced is provided. The yarn joining air force changing means may change the air force according to the determination result of the characteristic determining means. As a result, the yarn ends properly untwisted by the untwisting air force changing means as described above can be tangled and spliced with an appropriate air force according to the characteristics, so that the seam is further improved. Become.
[0012]
As described above, the present invention is characterized in that the air force of the first untwisting nozzle and the air force of the second untwisting nozzle can be changed independently. Further, it is characterized in that the air force of the untwisting nozzle and / or the air force of the piecing nozzle can be changed according to the characteristics of the yarn end for each piecing.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings.
[0014]
As shown in FIG. 1, between the winding package 1 and the yarn supplying package group 2, the yarn end Y1 on the winding package 1 side and the yarn end Y2 on the yarn supplying package group 2 side are connected by air force. A pneumatic yarn joining device 3 is arranged. The yarn supply package group 2 is composed of a plurality of yarn supply packages 2a, 2b, 2c,... Wound with yarns having different characteristics (yarn type, count, yarn color, etc.). These yarn supply packages 2a and the like are already rewound by a winder and dyed in a dyeing process after removing yarn defect portions such as slabs, and can be used alone in a loom, a knitting machine, or the like.
[0015]
Between the yarn supply package group 2 and the pneumatic yarn splicing device 3, there is provided yarn selection means 4 for selecting yarns of desired yarn supply packages 2a, 2b, 2c. Have been. That is, the yarn end Y2 of any of the yarn supply packages 2a, 2b, 2c... Selected by the yarn selection means 4 is connected to the yarn end Y1 of the winding package 1 by the pneumatic yarn joining device 3. ing. Thereby, a fancy yarn in which various yarn types, yarn colors, and the like are spliced in series can be manufactured.
[0016]
The pneumatic yarn joining device 3 will be described below. In FIG. 1, reference numerals 5 and 6 denote suction ports of a suction arm serving as a yarn end guiding means, which are not shown when the yarn end Y1 of the winding package 1 and the yarn end Y2 of the yarn supply package 2 are spliced. It is rotated by a mechanism, and both yarn ends Y1 and Y2 are suction-held by suction ports 6 and 5, respectively, and guided to the front of the pneumatic yarn splicing device 3. Both the guided yarn ends Y1 and Y2 are guided by the yarn joining nozzle 9 by the operation of the yarn moving lever 7 and the yarn pressing lever 8, and are held by the clamp devices 10 and 11, respectively. The yarn splicing nozzle 9 is provided on the front surface of the pneumatic yarn splicing device 3, and has a guide inclined portion 9a for guiding the yarn as shown in FIG. The yarn end guiding means may be a means for clamping the yarn end and guiding it to the yarn joining device 3.
[0017]
Thereby, the yarn end Y1 on the winding package 1 side reaches the suction arm suction port 6 via the clamp device 10, the fork guide 12, the yarn splicing nozzle 9, the yarn cutting device 13, and the fork guide 14. On the other hand, the yarn end Y2 on the yarn supply package 2 side reaches the suction arm suction port 5 via the clamp device 11, fork guide 14, yarn splicing nozzle 9, yarn cutting device 15, and fork guide 12. Thereafter, the yarn Y1 between the clamp device 12 and the suction arm 6 is cut by the yarn cutting device 13, the yarn Y2 between the clamp device 11 and the suction arm 5 is cut by the yarn cutting device 15, and the yarn ends Y1, Y2 is sucked by the first and second untwisting nozzles 16 and 17, respectively.
[0018]
The first untwisting nozzle 16 for the winding package yarn end Y1 is disposed between the yarn splicing nozzle 9 and the yarn cutting device 13, and the second untwisting nozzle 17 for the yarn feeding package yarn end Y2 is connected to the yarn untwisting nozzle 17. It is arranged between the nozzle 9 and the yarn cutting device 15. As shown in FIG. 2, the untwisting nozzle 17 blows air obliquely into a suction pipe 18 for sucking the yarn end Y2, and sucks the yarn end Y2 from the suction hole 19 by the negative pressure action. Specifically, the air passage 20 for blowing air into the suction pipe 18 is connected to the suction pipe 18 in the axial downstream direction and tangential direction of the suction pipe 18. As a result, a spiral flow is generated in the suction pipe 18, and the fiber at the yarn end Y2 is untwisted and loosened. The untwisting air may be an axial flow instead of a spiral flow.
[0019]
An untwisting air force changing means 21 for changing the air force for untwisting is connected to the air passage 20. The untwisting air force changing means 21 is provided on a branch pipe 22 connected to the air passage 20, a throttle portion 23 provided on one of the pipes 22 a of the branch pipe 22, and provided on the other second pipe 22 b of the branch pipe 22. And a collecting pipe 25 for collecting the branch pipe 22. According to this configuration, when the electromagnetic valve 24 is closed, the air discharged from the pump 26 is blown out into the suction pipe 18 through only the first pipe 22a provided with the throttle portion 23, so that the flow rate is limited, and the air is untwisted. When the solenoid valve 24 is opened, the air flow through the first pipe 22a and the second pipe 22b is blown into the suction pipe 18 so that the flow rate increases and the air force for untwisting increases. (Air pressure) increases.
[0020]
Although FIG. 2 shows only the first untwisting nozzle 17 for the yarn end Y2 of the supply package, the second untwisting nozzle 16 for the yarn end Y1 of the winding package has the same configuration. Of course. That is, untwisting air force changing means 21 and 21 that can independently change the air force of each nozzle 16 and 17 are connected to the first and second untwisting nozzles 16 and 17, respectively. The air force (air pressure) for untwisting the end Y2 and the air force (air pressure) for untwisting the winding package yarn end Y1 can be changed independently.
[0021]
On the other hand, the aforementioned yarn splicing nozzle 9 has a cylindrical portion that accommodates both yarn ends Y and Y2, and is connected to an air passage 27 that injects air for yarn splicing in a tangential direction. According to this configuration, swirling flow is generated in the yarn splicing nozzle 9 by the air jetted from the air passage 27, whereby the untwisted and loosened yarn ends Y and Y2 are entangled and spliced. Is done.
[0022]
By the way, as shown in FIG. 2, the solenoid valve 24 of the first untwisting air force changing means 21 for the yarn supply yarn end Y2 is provided in accordance with the characteristics (yarn type, yarn count, yarn color, etc.) of the yarn end Y2. A sequencer 28 for changing the air force (air pressure) is connected. Although not shown in FIG. 2, an electromagnetic valve of the second untwisting air force changing means for the winding yarn end Y1 similarly exists, and the sequencer 28 is also connected to the electromagnetic valve. .
[0023]
The sequencer 28 changes the yarn supply packages 2a, 2b, 2c... In a predetermined order by the yarn selecting means 4, and adjusts the electromagnetic valves of the first and second untwisting air force changing means 21 and 21 accordingly. The air force (air pressure) for untwisting is appropriately changed by opening and closing 24, 24. Specifically, when the yarn ends Y1 and Y2 to be untwisted are yarn types that are difficult to untwist, when the yarn length is large, and when the yarn color that is difficult to untwist (generally dark color), the solenoid valve 24 is used. And untwist with a large air force (air pressure). Under the opposite condition, the solenoid valve 24 is closed and untwisting is performed with a small air force (air pressure). That is, the sequencer 28 serves as untwisting characteristic determination means.
[0024]
The adjustment of the untwisting force is performed independently by the first untwisting nozzle 17 of the yarn supply package yarn end Y2 and the first untwisting nozzle 16 of the winding package yarn end Y1. Therefore, when the yarn ends Y1 and Y2 having different characteristics such as the yarn type, the yarn count, and the yarn color are spliced, it is possible to untwist each yarn end Y1 and Y2 with an appropriate air force (air pressure). It is possible to obtain an appropriate untwisted state at both yarn ends. Thereafter, the yarn ends Y1 and Y2 are spliced by the yarn splicing nozzle 9, but since the yarn ends are properly untwisted, a good seam can be obtained.
[0025]
In place of the sequencer 28, as shown in FIG. 2, sensors 29, 29 for determining the thread type, yarn count, thread color, etc. are provided in the suction holes 19, 19 of the untwisting nozzles 16, 17, respectively. The electromagnetic valves 24, 24 may be opened and closed according to the detection values of the sensors 29, 29. According to this sensor 29, even when the knot yarn 30 (knot yarn) as shown in FIG. 3 is used, whether or not the knot portion 31 is sucked into the suction holes 19, 19 of the untwisting nozzles 17, 18 is determined. , It is possible to control the solenoid valve 24 to open to increase the air force (air pressure) when the bump 31 difficult to untwist is sucked, and to close the solenoid valve 24 otherwise. is there. The opening and closing of the solenoid valve 24 may be repeated instantaneously, and the opening / closing interval may be changed to adjust the passing air amount steplessly.
[0026]
Further, as shown in FIG. 2, a yarn joining air force changing means 32 for changing an air force (air pressure) for yarn joining may be connected to the air passage 27 of the yarn joining nozzle 9. The yarn joining air force changing means 32 is provided on a branch pipe 33 connected to the air passage 27, a throttle portion 34 provided on one pipe 33 a of the branch pipe 33, and provided on the other pipe 33 b of the branch pipe 33. It comprises an electromagnetic valve 35 and a collecting pipe 36 for collecting the branch pipe 33. Then, the solenoid valve 35 is connected to the sequencer 28 or the sensor 29, and when the yarn ends Y1 and Y2 to be spliced are thick, the solenoid valve 35 is opened to increase the air force for splicing. If not, the solenoid valve 35 is closed. This makes it possible to use an appropriate air force for splicing according to the yarn counts of the yarns Y1 and Y2, so that the seam of the yarn is further improved and the air consumption can be reduced. In this case, the sequencer 28 or the sensor 29 also serves as a yarn end characteristic determining unit in addition to the untwisting characteristic determining unit.
[0027]
In the above embodiment, the case where the pneumatic yarn splicing device 3 is applied to a winder that rewinds the yarn from the yarn supply package group 2 to the winding package 1 has been described. However, the present invention is not limited to this, and as shown in FIG. The pneumatic yarn splicing device 3 may be provided in a system for feeding yarn directly from the yarn supply package group 2 to the knitting machine 37 (knitting machine). In order to continuously operate the nitta 37, a yarn storage section 38 is provided between the nitta 37 and the yarn splicing device 3, and the yarn stored in the yarn storage section 38 is supplied to the nitta 37 during the yarn splicing. It is desirable to do so.
[0028]
Furthermore, the pneumatic yarn joining device of the present invention can be used, for example, in the following cases. That is, the present invention is applicable to an automatic winder that unwinds a yarn from one yarn supply package or a yarn supply bobbin (spinning bobbin) and winds the yarn into one winding package. 1, an automatic winder in which the yarn supply package group 2 is a single yarn supply package and the yarn selection means 4 is omitted. As the yarn handled by such an automatic winder, the knot yarn shown in FIG. 3 described above can be considered. In addition, the characteristics of one yarn end and the characteristics of the other yarn end are determined (that is, there is no change in the characteristics of the yarn end for each splicing), and the characteristics of one yarn end and the characteristics of the other yarn end are determined. Can be used when is different. Further, when the characteristics of one yarn end and the characteristics of the other yarn end are the same and the characteristics of the yarn end are changed for each splicing, that is, a plurality of types of yarns are sequentially spliced by one splicing device. It can also be used in such cases. In addition, the change of the air force may be a change by the air pressure other than the change by the air flow rate.
[0029]
【The invention's effect】
As described above, the pneumatic yarn splicing device according to the present invention can exhibit the following excellent effects.
[0030]
(1) According to the first aspect of the present invention, the air force of the first and second untwisting nozzles is independently changed by the untwisting air force changing means, so that one end of the yarn and the other end of the yarn are changed. Even if the yarn characteristics (yarn type, yarn count, yarn color, etc.) are different, an appropriate untwisted state can be obtained, and a good seam can be formed.
[0031]
(2) According to the second aspect of the invention, the untwisting air force changing means appropriately changes the air force of the first and second untwisting nozzles according to the determination result of the untwisting characteristic determining means. Even if the characteristics of the yarn end to be untwisted are changed between one yarn end and the other yarn end, an appropriate untwisted state can always be obtained accordingly, and a good seam can be formed. it can.
[0032]
(3) According to the third aspect of the invention, the yarn joining air force changing means appropriately changes the air force in accordance with the determination result of the yarn joining characteristic determining means, so that the untwisting air force changing means properly untwists. The ends of the two yarns can be entangled with an appropriate air force according to their characteristics and spliced, and the seam can be further improved.
[Brief description of the drawings]
FIG. 1 is a front view of a pneumatic yarn splicing device according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along line II-II of FIG.
FIG. 3 is a view showing a knot yarn.
FIG. 4 is a view showing a modified embodiment.
[Explanation of symbols]
Y1 one yarn end Y2 the other yarn end 9 yarn splicing nozzle 16 first untwisting nozzle 17 second untwisting nozzle 21 untwisting air force changing means 32 yarn splicing air force changing means

Claims (3)

A first untwisting nozzle for untwisting one yarn end, a second untwisting nozzle for untwisting the other yarn end, and a yarn splicing nozzle for splicing both yarn ends after untwisting. In the pneumatic yarn splicing device, the first and second untwisting nozzles are provided with untwisting air force changing means for independently changing the air force of each nozzle. 2. An untwisting air force changing means for changing an air force in accordance with a judgment result of the untwisting characteristic judging means for judging characteristics of a yarn end to be untwisted. The pneumatic yarn splicing device as described in the above. The yarn splicing nozzle is provided with yarn splicing air force changing means for changing an air force for splicing, and yarn splicing characteristic determining means for judging characteristics of a yarn end to be spliced is provided. 3. The pneumatic yarn splicing device according to claim 1, wherein the yarn splicing air force changing means changes the air force in accordance with the determination result of the means.

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