JPH05186936A - Defective yarn removing method - Google Patents

Abstract

PURPOSE:To resolve the drawbacks of conventional defective yarn removing techniques by using auxiliary guide yarn. CONSTITUTION:Separate guide yarn is picked into an opening identical with that for defective yarn in a pick finding state and one end of the guide yarn is bound to the defective yarn followed by pulling the guide yarn from the other side of yarn feed according to the defective yarn's state, thus removing the defective yarn from the opening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing defective yarn from inside an opening using a guiding yarn in a shuttleless loom.

[0002]

2. Description of the Related Art The technique disclosed in Japanese Patent Laid-Open No. 62-6938 is
After the weft yarn is looped in a state of being connected to the defective yarn, the defective yarn is removed from the opening by pulling the weft yarn after the weft insertion on the anti-feeding side. According to this technique, the weft yarn is loop-inserted, so that the weft yarn is easily caught on the sub-nozzle during the weft insertion process, the weft insertion is unstable, and the defective yarn removing operation becomes uncertain.

[0003]

OBJECTS OF THE INVENTION It is an object of the present invention to overcome the drawbacks of the prior art by using an auxiliary guide yarn in removing defective yarn from the non-feed side.

[0004]

According to the present invention, according to the present invention, another guide yarn is inserted into the same opening as the defective yarn in the state of being spouted,
One end of the guide yarn is connected to the defective yarn, and the defective yarn is removed from the inside of the opening by pulling the guide yarn from the anti-feeding side according to the state of the defective yarn.

[0005]

1 to 6 show a series of operations of a defective yarn removing method according to the present invention. In this embodiment, weft insertion of two color weft threads 1 and 2 is assumed, and when weft insertion failure of one weft thread 1 occurs, the other weft thread 2 is guided to the guide thread 12.
Used as.

The weft threads 1 and 2 are supplied from the thread feeders 3 and 4, respectively, and are stored by the length measuring and storing devices 5 and 6 only for a length required for one or several weft insertions. It is unwound by the stop pin 51 or the locking pin 61, is inserted into the opening 10 of the warp thread 9 by the main nozzle 7 or the main nozzle 8 and the plurality of sub-nozzles 26, and is beaten by the reed 13 to the cloth fell 14. A cloth 15 is cut by the yarn supplying cutter 17 on the yarn supplying side. The normal weft insertion state is detected by detecting the ends of the weft yarns 1 and 2 by the weft yarn detection feeler 16a on the non-feeding side and by detecting the end portions of the weft yarns 1 and 2 by the weft yarn detection feeler 16b.

When a weft insertion failure occurs in such a weft insertion process as shown in FIG. 1, the weft detection feeler 16a detects the weft insertion failure and stops the weaving machine control device (not shown). Output the command and stop the loom at the next weaving cycle. At the same time, the loom controller
Between the main nozzle 7 and the cloth 15, by starting the jetting operation of the blow-up nozzle 18 at the tip side of the main nozzles 7 and 8 and retracting the locking pin 51 to unwind the weft 1 of the required number of turns. Defective weft winding device 1
The defective yarn 11 is kept connected to the weft yarn 1 by being guided to the suction port 20 of 9 and avoiding the cutting of the weft yarn 1 by the yarn feeding cutter 17. At this time, an airflow in the pulling direction is generated inside the suction port 20 of the defective yarn winding device 19, whereby the weft yarn 1 is positively pulled in.

[0008] Next, as shown in FIG. 2, the loom is stopped and then reversely rotated to set the defective yarn 11 to the weft condition while the defective yarn 11 is still connected to the weft yarn 1. Here, the locking pin 61 of the length measuring and storing device 6 retracts, and at the same time, the main nozzle 8 and the sub nozzle 26 start the jetting operation, so that the weft yarn 2 on the side of the length measuring and storing device 6 is defective as the guide yarn 12. It is newly weded inside the same opening 10 as the thread 11. At this time, the suction nozzle 22 as the weft yarn take-up means on the non-feeding side starts the sucking operation to pull the tip portion of the guide yarn 12 into the inside.
In this way, the defective yarn 11 and the guide yarn 12 are inserted inside the opening 10. After that, the weft yarn 1 continuous with the defective yarn 11 is cut by the cutter 21 between the main nozzle 7 and the suction port 20. by this,
The defective yarn 11 is separated from the weft yarn 1.

Subsequently, as shown in FIG. 3, the main nozzle 8
The guide yarn 12 is guided to the inside of the suction port 20 of the defective yarn winding device 19 by the blowing action of the blowing nozzle 18 and the unwinding action of the locking pin 61 of the length measuring and storing device 6 on the side of. In this state, since the suction port 20 and the suction nozzle 22 continue the suction operation, the defective yarn 1
Both 1 and the guide yarn 12 enter the inside of the suction port 20 of the defective yarn winding device 19 at one end and the inside of the suction nozzle 22 at the other end.

In this state, as shown in FIGS. 3 and 4, the knotter 27 is provided between the suction port 20 and the yarn supplying side of the cloth 15.
The defective yarn 11 and the guide yarn 12 are connected to each other by the cutter 28 on the suction port 20 side. The weft yarn 2 inside the separated suction port 20 is taken up by the defective yarn winding device 19
It is drawn in by the suction operation of. The defective yarn 11 and the guide yarn 12 are connected with an adhesive or a knot.

The suction port 20 and the blow-up nozzle 1
In addition to aligning the defective yarn 11 and the guide yarn 12 by 8 so that they can be tied together, the defective yarn 11 and the guide yarn 12 may be aligned by a pair of locking levers (not shown) provided so as to be movable in the vertical direction. In that case, first, the yarn feeding cutter 17 is set in the inoperative state. However, at this time, the blowing nozzle 18 is not used and other known means is used to avoid cutting by the yarn feeding cutter 17. One locking lever provided between the main nozzles 7, 8 and the end of the cloth 15 displaces the weft thread 1 connected to the defective thread 11 upward, for example, between the main nozzle 7 and the end of the cloth 15. Then, the knotter 27 is guided to the operating region, the guide yarn 12 is newly inserted, and then the guide yarn 12 is guided to the operating region of the knotter 27 by the other locking lever. As a result, both the defective yarn 11 and the guide yarn 12 to be connected are aligned with the operating range of the knotter 27. If necessary, when guiding the defective yarn 11 and the guide yarn 12 to the operation area of the knotter 27, by retracting the locking pins 51 and 61 of the length measurement storage devices 5 and 6, a predetermined amount of weft yarn is obtained. It may be unwound.

Next, as shown in FIGS. 5 and 6, the suction operation by the suction port 20 on the yarn supplying side is stopped and the suction nozzle 22
The guide yarn 12 is pulled on the side opposite to the yarn feeding side by increasing the suction force of the guide yarn 12 by sandwiching the guide yarn 12 by using a pair of grip rollers 25 as necessary, and at the same time, the length of the measurement storage device 6 is reduced. By retracting the stop pin 61, the pulling state is set. Then, the suction nozzle 22 and the pair of grip rollers 25 pull the guide yarn 12 to pull the defective yarn 11 into the cloth cloth 14
Defective yarn 1 while folding back in the direction of pulling away from
1 is pulled out from the opening 10.

After continuing the pulling operation for the time required for pulling out or for the length required for pulling out, or the defective yarn 11
The grip roller 25 stops the pulling operation after it is confirmed that is completely drawn from the inside of the opening 10.
After that, the locking pin 61 of the length measuring and storing device 6 advances to stop the feeding state of the weft yarn 2, and the yarn feeding cutter 17 moves forward as necessary, or the yarn feeding cutter 17 moves. The weft thread 2 is cut between the main nozzle 8 and the end of the cloth 15 by inching the loom to an operating loom rotation angle. In this way, the defective yarn 11 is
The yarn is guided by the guide yarn 12 and is removed on the side opposite to the yarn supplying side. In addition,
The weft thread 2 is not limited to removing the defective thread 11 with the weft thread 2 connected to the main nozzle 8 side.
The defective yarn 11 may be removed after cutting by.

In this embodiment, the weft yarn take-up means is composed of a suction nozzle 22 and a pair of grip rollers 25. The defective yarn 11 and the guide yarn 12 are captured by the suction operation of the suction nozzle 22, and these Although the pulling operation is performed while being shared by the pair of grip rollers 25, it may be configured by only the pair of grip rollers 25. In the case where the weft thread take-up means is composed only of the pair of grip rollers 25, when the tip of the guide thread 12 reaches between the pair of grip rollers 25, this state is detected by a sensor or the like,
By bringing the pair of grip rollers 25 close to each other,
The guide thread 12 is sandwiched between them to be captured, and then rotated to perform the pulling operation.

The above embodiment is an example in which the other weft yarn 2 is used as the guide yarn 12 when a weft insertion defect occurs with respect to the weft yarn 1. However, in the following embodiments, when the weft insertion of the weft yarn 1 is defective, This is an example of using the weft thread 1 as the guide thread 12. 7 to 9 show the embodiment.

When a weft insertion failure is detected, the yarn feeding cutter 17 does not avoid cutting as shown in FIG. Therefore, the defective yarn 11 after weft insertion is cut by the yarn feeding cutter 17 on the yarn feeding side. Thereafter, similarly to the above, after the loom is stopped and the defective yarn 11 is put out by the reverse rotation operation, by the unwinding operation of the locking pin 51 of the length measurement storage device 5 and the jetting operation of the main nozzle 7, The weft thread 1 is newly inserted as the guide thread 12. The end of the guide yarn 12 on the side opposite to the yarn feeding side is drawn in from the suction nozzle 22 and held by the pair of grip rollers 25.
Here, the knotter 27 with a suction function moves near the tip of the main nozzle 7 to perform a suction operation to pull in the portion of the guide yarn 12 on the yarn supplying side, and then the cutter 28 causes the main nozzle 7 to move. The weft thread 1 connected to is cut. If necessary, the retracting pin 51 may be retracted for retracting and a predetermined amount of the weft yarn 1 may be unwound from the length measuring and storing device 5.

Next, as shown in FIG. 8, the knotter 27 moves into the inside of the opening 10 and sucks one end of the defective yarn 11 so that the defective yarn 11 is drawn into the inside. The end of the thread 12 is connected. In addition, defective yarn 1
In the suction of 1, if necessary, the separation nozzle 29
Is used. This detaching nozzle 29 is used for the defective yarn 11
The defective yarn 11 is positively separated from the cloth cloth 14 by injecting the air flow for separation to the yarn feeding side end of the knotter 27 so that the defective yarn 11 can easily enter the suction port of the knotter 27.

After that, as shown in FIG. 9, the pair of grip rollers 25 sandwich the guide yarn 12 and pull it, thereby pulling the defective yarn 11 continuous with the guide yarn 12 in the direction of separating from the cloth fell 14. The defective yarn 11 is removed from the inside of the opening 10. This removing operation can also be applied to the insertion of one color. The defective yarn 11 may be removed with the guide yarn 12 connected to the main nozzle 7 side. That is, the cutting of the weft yarn 1 by the cutter 28 after the knotter 27 draws the yarn supplying side portion of the guide yarn 12 into the inside thereof is omitted, and the end portion of the defective yarn 11 is connected with the guide yarn 12 connected to the main nozzle 7 side. Connect with. When removing the defective yarn 11, the locking pin 51 is retracted so that the weft yarn 1 is unwound from the length measurement storage device 5 along with the removal of the defective yarn 11. When the removal of the defective yarn 11 is completed, the locking pin 51 is advanced and the suction nozzle 22
Is operated to tension the weft thread 1 in the opening 10. After that, the loom is moved to a predetermined loom rotation angle and then started.

As another method of using the weft thread 1 as the guide thread 12, the blowing nozzle 18 is used to avoid cutting when a weft insertion failure occurs, and then the cutter 21 is used.
The weft yarn 1 may be newly inserted by cutting the weft yarn 1 between the main nozzle 7 and the defective yarn winding device 19.

[0020]

According to the present invention, when the defective yarn in the bent state is removed, the guide yarn connected thereto is used as a guide, so that the defective yarn can be reliably removed even if the weaving width becomes wide. In addition, in the process of removing the defective yarn on the anti-feeding side, the defective yarn is always pulled back in the direction in which it is pulled away from the weaving cloth, so that no large tension is applied to the defective yarn during extraction, No yarn breakage occurs, and therefore the reliability of the removing operation is enhanced.

[Brief description of drawings]

1 to 6 are plan views showing a series of operation states of defective yarn removing operation according to the first embodiment.

7 to 9 are operation explanatory diagrams of another embodiment according to the defective yarn removing operation of the first embodiment.

[Explanation of symbols]

 1 Weft yarn 2 Weft yarn 10 Opening 11 Bad yarn 12 Guide yarn 14 Weaving cloth 19 Bad yarn winding device 27 Knotter

Claims (2)

[Claims] 1. A defective yarn is squeezed out, a guide yarn is newly inserted into the same opening as the defective yarn, and the weft-inserted guide yarn and the defective yarn are connected on the yarn supplying side, and the guide yarn is unwound. A defective yarn removing method characterized in that a defective yarn is removed from the inside of the opening by pulling from the yarn supplying side. 2. The defective yarn removing method according to claim 1, wherein the weft yarn is used as a guide yarn.