JP3560332B2 - Defective yarn removing method and defective yarn removing device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a defective yarn removing method for inserting a new weft into an opening of a warp in a state where the defective yarn is connected to a main nozzle when removing a defective yarn due to occurrence of a defective weft insertion. The present invention relates to a method and an apparatus for changing at least one of an insertion length of a weft and an operating condition of a weft insertion nozzle in a process of inserting the weft into an opening according to a type of the weft.
[0002]
[Prior art]
Japanese Patent Application Laid-Open No. H11-107133 discloses that after a loom is stopped due to occurrence of a weft insertion defect, a defective yarn is spouted out, and a main nozzle for weft insertion and an auxiliary nozzle for weft insertion are jetted, so that the weft is inserted into the opening of the warp. Pulling the defective yarn away from the pre-weaving by inserting it into the weft, locking the weft with the winding drum of the defective yarn, rotating the winding drum once, and then reinserting the weft into the opening of the warp. Discloses that a weft connected to a main nozzle faces a cutting area of a cutting cutter, cuts the weft, and then removes a defective yarn by a winding drum.
[0003]
Further, Japanese Patent Application Laid-Open No. Hei 5-195378 discloses that after a loom is stopped due to a defect in weft insertion, a defective yarn is discharged, and a main nozzle for weft insertion and a sub-nozzle for weft insertion are jetted to open the weft. By inserting the weft into the suction nozzle on the non-feed side by inserting the weft into the loop, and then inserting the pin-shaped weft guide into the loop of the loop-shaped weft, the weft from the feed side It discloses tow and remove defective yarn via a weft guide.
[0004]
In addition to the above two technologies, as this type of technology, after the loom is stopped due to the occurrence of a defect in weft insertion, the defective yarn is spun out, and the main nozzle for weft insertion and the sub-nozzle for weft insertion are jetted to change the weft into warp. There is also a method of passing the weft to a pulling device (suction nozzle) on the non-feeding side by inserting the weft into the opening, and pulling and removing the defective yarn from the non-feeding side.
[0005]
[Problems to be solved by the invention]
According to the above-described conventional technology, for example, in the case of a woven fabric in which weft yarns having a large shrinkage ratio such as a normal spun yarn and a spuntex yarn are alternately inserted, the shrinkage ratio varies depending on the type of the weft yarn used. However, there is a problem that the success rate of removing the defective yarn is deteriorated. This is because, when removing the defective yarn, when the spuntex yarn is inserted into the opening of the warp, the spuntex yarn shrinks and becomes short in the opening of the warp, making it difficult to get in the airflow of the sub-nozzle. Also, if the spun yarn is inserted under the conditions suitable for inserting the spuntex yarn (insertion length, injection pressure of the weft insertion nozzle, injection time, etc.), the spun yarn may be caught on the warp yarn, etc. There is a possibility that the operation of removing the defective yarn cannot be performed.
[0006]
Therefore, an object of the present invention is to make it possible to reliably remove a defective yarn in a method for removing a defective yarn irrespective of the type of weft yarn.
[0007]
[Means for Solving the Problems]
Under the above-mentioned object, the present invention provides that when a defective weft insertion occurs, a new weft is inserted by a weft insertion nozzle into a state in which a defective yarn associated with the poor weft insertion is connected to a main nozzle for the weft insertion. In the method of removing a defective weft from the opening of the warp by pulling the defective yarn after the insertion into the opening, the insertion length of the weft and the nozzle for weft insertion in the process of inserting a new weft into the opening of the warp One or both of the operating conditions are changed according to the type of the weft.
[0008]
In the case of multi-color weft insertion in which different types of wefts are inserted, the defective yarn removing method of the present invention determines the type of the defective weft associated with the defective insertion, and, in response to the type of the weft, At least one of the insertion length and the operating condition of the weft insertion nozzle is determined.
[0009]
In the case of single weft insertion, the method for removing defective yarns of the present invention provides a method of manually inputting the type of the weft, in accordance with the type, the insertion length of the weft and the operating conditions of the nozzle for weft insertion. Determine at least one.
[0010]
The operating condition of the weft insertion nozzle is at least one of the injection time of the nozzle, the injection pressure of the nozzle, and the selection mode of the auxiliary nozzle to be in the operation state among the plurality of auxiliary nozzles, that is, one item or two or more items. Change by the combination of.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an outline of weaving different kinds of weft yarns of different kinds by inserting three different kinds of wefts 1 in a predetermined order by an air jet loom as an example of multicolor weft insertion.
[0012]
The three different types of weft yarns 1 are supplied from three yarn feeders 5, respectively, guided to, for example, a drum-type length measuring and storing device 6, and engaged with the outer peripheral surface of the stationary drum 8 by the rotational movement of the rotary yarn guide 7. It is wound while being locked by the stopper pin 9, measured in length, and stored. At the weft insertion start timing, when the solenoid 10 retracts the locking pin 9 to release the weft 1 in the stored state on the outer peripheral surface of the drum 8, the weft insertion nozzle of the air jet loom, that is, the main nozzle 2 and The plurality of auxiliary nozzles 3 arranged along the weave unwind the weft 1 of the drum 8 by jetting air, and insert the weft into the opening 12 of the warp 11. This weft insertion state is detected by the feeler 19 on the arrival side of the leading end of the weft 1 and sent as an output signal to a loom controller 20 described later.
[0013]
After the weft insertion, the weft 1 is beaten by the reed 13 before weaving of the woven fabric 14 to become the woven fabric 14 as a different kind of woven fabric of the weft, and thereafter, the yarn feeding cutter on the weft insertion side (yarn feeding side). 4, the woven fabric 14 is cut at the weft insertion side end and separated from the weft 1 in the main nozzle 2. The yarn feeding cutter 4 is, for example, a mechanical drive type, is fixed on an extension line before weaving on the yarn feeding side, and is linked with the main shaft 21 of the loom to close at a rotation angle of about 40 degrees of the main shaft 21. The weft 1 inserted is cut.
[0014]
The defective yarn removing device 36 includes the weft processing device 18, the blowing nozzle 16, and the defective yarn removing device 24. In the weaving process, when a weft insertion failure occurs, the defective yarn 1a caused by the weft insertion failure is processed by the blow-up nozzle 16, the weft processing device 18, and the like. The blow-up nozzle 16 is installed near the tip of the main nozzle 2 and blows air upward before stopping the loom due to poor weft insertion, and locks the rule storage device 6 corresponding to the defective yarn 1a. By temporarily retracting the pin 9 and unwinding the weft 1 having a predetermined number of turns, the weft 1 inside the main nozzle 2 and the defective yarn 1a connected thereto are removed from the cutting area of the yarn feeding cutter 4. As a result, the defective yarn 1a caused by the poor weft insertion remains connected to the main nozzle 2.
[0015]
Further, the weft processing device 18 is installed above between the main nozzle 2 and the weft insertion side end of the woven fabric 14, and when a poor weft insertion occurs, pulls and removes the defective yarn 1a related to the poor weft insertion. In order to pull the defective yarn 1a from the upper standby position, the weft 1 is hooked and captured by the take-in pin 15 and then raised to the original standby position, and the winding drum 17 rotates to pull the defective yarn 1a. The sucked defective yarn 1a is sucked by the suction device 29 and discharged.
[0016]
Next, FIG. 2 shows a control system of the air injection loom. The loom control device 20 determines a normal weft insertion or a weft insertion failure from the level of the output signal of the feeler 19, and when a weft insertion failure occurs, generates a machine stop signal and sends the signal to the defective yarn removing device 24. Outputs start command. Further, the loom control device 20 receives a rotation signal from a rotation detector 22 connected to the main shaft 21 of the loom, and outputs the rotation signal to the weft selection device 23 and the defective yarn removal control device 24.
[0017]
During weaving, the weft selection device 23 outputs a weft selection signal to the loom control device 20 in a predetermined weft insertion order while inputting the rotation signal of the rotation detector 22 from the loom control device 20. Then, the loom control device 20 outputs a control signal to the driving device 27 corresponding to the weft selection signal to insert the selected weft 1 into the weft, and the solenoid 10 of the locking pin 9 and the electromagnetic opening and closing of the main nozzle 2 The drive of the valve 31 and the pressure control valve 33 is controlled.
[0018]
The machine control device 20 also outputs a control signal to the driver 28 to control the driving of the electromagnetic on-off valve 32 and the pressure control valve 34 of the auxiliary nozzle 3. Here, the rule length storage device 6 (the solenoid 10 of the locking pin 9), the main nozzle 2, the electromagnetic on-off valve 31 of the main nozzle 2, and the pressure control valve 33 constitute a main weft insertion device 25. The auxiliary nozzle 3, the electromagnetic on-off valve 32 and the pressure control valve 34 constitute an auxiliary weft insertion device 26.
[0019]
The timing of the advance and retreat of the locking pin 9 during the normal weft insertion, the timing of the start and end of the injection of the main nozzle 2, the injection pressure, and the timing of the start and end of the injection of the auxiliary nozzle 3 are determined by the loom controller 20. Is set in advance. Note that these values are set appropriately for each type of the weft yarn 1.
[0020]
When a weft insertion failure occurs, the loom control device 20 issues a start command to the defective yarn removal control device 24. When receiving the start command, the defective yarn removal control device 24 controls the electromagnetic opening / closing valve 30 of the blow-up nozzle 16 and the weft processing device 18 based on the operation sequence of the defective yarn removal method. As a preparation, by outputting a control signal to the driver 27 corresponding to the defective yarn 1a, the solenoid 10 of the locking pin 9, the solenoid on-off valve 31 of the main nozzle 2, and the pressure control valve 33 are operated, and if necessary, By outputting a control signal to the driver 28, the electromagnetic on-off valve 32 and the pressure control valve 34 of the auxiliary nozzle 3 are operated. Accordingly, the main nozzle 2 or the main nozzle 2 and the auxiliary nozzle 3 insert a new weft 1 from the yarn supply side into the opening 12 according to the insertion condition according to the type of the weft 1. In order to determine the yarn type at this time, the weft selection signal of the weft selection device 23 is also sent to the defective yarn removal control device 24.
[0021]
When removing the defective yarn 1a, the insertion conditions for inserting a new weft 1 to be performed as pre-preparation, that is, (1) the insertion length of the weft 1, the (2) the weft insertion nozzle (the main nozzle 2 or the main nozzle 2). The operating conditions of the nozzle 2 and the auxiliary nozzle 3) or (3) the insertion length of the weft 1 and the operating conditions of the weft insertion nozzle (the main nozzle 2 or the main nozzle 2 and the auxiliary nozzle 3) are as follows. Is input in advance from the loom control device 20 to the defective yarn removal control device 24 and set as a unique value for each type.
[0022]
When the start command is input from the loom controller 20, the defective yarn removing device 24 determines the type of the weft 1 having the defective weft insertion from the weft selection signal, determines the insertion condition corresponding to the type of the weft 1, Based on this, a control signal is output to the corresponding driver 27 and driver 28.
[0023]
By the way, the defective yarn removing method according to the present invention is arranged such that when a defective weft insertion occurs, the defective yarn 1a caused by the defective weft insertion is connected to the main nozzle 2 for the weft insertion, and the main nozzle for the weft insertion from the yarn supply side. After the process of inserting a new weft 1 into the opening 12 of the warp 11 by the second or auxiliary nozzle 3 or the main nozzle 2 and the auxiliary nozzle 3, the defective yarn 1 a is pulled and removed from the opening 12 of the warp 11. In the yarn removing method, in the process of inserting a new weft 1 into the opening 12 of the warp 11, the insertion length of the weft 1 and the operating conditions of the main nozzle 2 or the auxiliary nozzle 3, or the operating conditions of the main nozzle 2 and the auxiliary nozzle 3 are determined. At least one of them is changed according to the type of the weft 1. This series of operations is executed by the defective yarn removal control device 24.
[0024]
In the case of multicolor weft insertion in which different types of wefts 1 are inserted in a predetermined order, the defective yarn removal control device 24 determines the type of the weft 1 of the defective yarn 1a associated with the defective weft insertion when a defective insertion of the weft occurs. Judgment is made and at least one of the insertion length of the weft 1 and the operating conditions of the main nozzle 2 or the auxiliary nozzle 3 or the main nozzle 2 and the auxiliary nozzle 3 is determined in accordance with the type of the weft 1.
[0025]
In the case of a single weft insertion, the defective yarn removal control device 24 manually inputs the type of the weft 1 so that the insertion length of the weft 1 and the main nozzle 2 Alternatively, at least one of the operating conditions of the auxiliary nozzle 3 or the main nozzle 2 and the auxiliary nozzle 3 is determined.
[0026]
The operating conditions of the main nozzle 2 or the auxiliary nozzle 3 or the operating conditions of the main nozzle 2 and the auxiliary nozzle 3 include at least one of the injection time, the injection pressure, and the selection mode of the auxiliary nozzle 3 to be operated among the plurality of auxiliary nozzles 3. One, that is, one item or a combination of two or more items.
[0027]
(1) to (10) of FIG. 3 and FIG. 4 are specific examples of a method for removing defective yarns of different types of weft yarns of different kinds by multicolor weft insertion in which different types of wefts 1 are inserted in a predetermined order. This shows a series of operation order. In FIGS. 3 and 4 (1) to (10), the left side shows the rotation angle of the main shaft 21 of the loom, the right side shows the weaving structure of the woven fabric (different and different-number woven fabric) 14, and the left and right sides. The middle part shows the situation of the weft 1 and the defective yarn 1a. In addition, only one main nozzle 2 is shown as corresponding to the defective yarn 1a.
[0028]
(1) in FIG. 3: If a weft insertion failure occurs during weaving, the arrival of the weft 1 on the feeler 19 is near the rotation angle of 290 degrees in the cycle of the weft insertion failure (one rotation range of the main shaft 21). Defective insertion is detected, and an output signal of a level corresponding to the defective weft insertion is sent to the loom controller 20. At this time, the loom control device 20 generates a loom stop signal, starts braking of the loom, and activates the defective yarn removal control device 24.
[0029]
FIG. 3 (2): Simultaneously with the start of the braking of the loom, the defective yarn removal control device 24 injects air from the blow-up nozzle 16 and operates the solenoid 10 to retreat the locking pin 9 so that the locking pin 9 is retreated. Then, the weft 1 necessary for the yarn processing, for example, the weft 1 for two turns is unwound by the injection of the main nozzle 2. As a result, the unwound weft 1 is blown up from the tip of the main nozzle 2 by the blow-up nozzle 16, and is curved in an inverted U-shape between the main nozzle 2 and the weft insertion side end of the woven fabric 14. Then, it deviates from the weft insertion route. Therefore, in the braking process of the loom, even if the reed 13 drives the defective yarn 1a to the position before weaving and the yarn feeding cutter 4 performs the cutting operation, the weft yarn 1 is out of the cutting area of the yarn feeding cutter 4 and is cut. Instead, it remains in a state of being connected to the defective yarn 1a from inside the main nozzle 2. Eventually, the loom stops around 150 degrees of rotation in the next cycle while rotating by inertia.
[0030]
FIG. 3 (3): The loom control device 20 automatically reverses the loom and temporarily stops at a rotation angle of about 180 degrees in the weft insertion failure occurrence cycle, thereby discharging the defective yarn 1a before weaving. Note that the blow-up nozzle 16 ends the blow-up operation near the rotation angle of 230 degrees in the weft insertion failure occurrence cycle during the reverse rotation.
[0031]
FIG. 3 (4): The defective yarn removal control device 24 causes the main nozzle 2 corresponding to the weft insertion failure to be ejected for a short period of time while keeping the locking pin 9 in the advanced state, and all the auxiliary nozzles 3 or the specific position. Auxiliary nozzles 3 (for example, only half of the auxiliary nozzles 3 located on the yarn supply side among all the auxiliary nozzles 3, or a first auxiliary nozzle group and a first auxiliary nozzle located on the most yarn supply side among a plurality of auxiliary nozzle groups) A new weft 1 (in this case, the weft 1 that has been blown up by the blow-up nozzle 16 is shown) by simultaneously injecting air in the weft insertion direction by the second auxiliary nozzle group adjacent to the nozzle group. It is inserted into the opening 12 of the warp 11, the defective yarn 1 a is pulled away from the front of the woven fabric 14 by the force of air through the inserted weft 1, and the weft 1 and the defective yarn 1 a Stretching in direction. At this time, the defective yarn removing device 24 determines the yarn type of the defective yarn 1a, determines an insertion condition corresponding to the yarn type, and outputs a control signal based on the condition.
[0032]
FIG. 3 (5): The weft processing device 18 (winding drum 17) descends from the upper standby position to the lower catching position, and catches the weft 1 by catching it with the pin 15 for catching.
[0033]
FIG. 3 (6): The weft processing device 18 (the winding drum 17) rises from the lower capturing position to the upper standby position.
[0034]
FIG. 4 (7): Here, the defective yarn removal control device 24 is provided with the locking pin 9 corresponding to the weft insertion failure, the main nozzle 2, and, if necessary, all the auxiliary nozzles 3 or the auxiliary at a specific position. The nozzle 3 is operated. The main nozzle 2 or all the auxiliary nozzles 3 or the auxiliary nozzles 3 at a specific position inject air at 180 degrees in the weft insertion failure occurrence cycle to put a new weft 1 necessary for yarn processing into the opening 12. insert.
[0035]
As described above, in the process of inserting a new weft 1 into the opening 12 of the warp 11, one or both of the insertion length of the weft 1 and the operating condition of the weft insertion nozzle (main nozzle 2 or auxiliary nozzle 3). Is changed according to the type of the weft 1. In the case of multicolor weft insertion in which different types of wefts 1 are inserted in a predetermined weft insertion order, when a defective weft insertion occurs, the type of the defective weft 1a associated with the defective weft insertion is determined, and the corresponding type is selected. Then, at least one of the insertion length of the weft 1 and the operating conditions of the weft insertion nozzles (main nozzle 2 and auxiliary nozzle 3) is determined.
[0036]
For example, referring to the insertion of the weft 1 in (7) of FIG. 4, if the weft 1 is a yarn having a small shrinkage, for example, a spun yarn, the defective yarn removing device 24 operates the solenoid 10 to set the locking pin 9 to 1 The weft 1 is wound up by one turn on the drum 8 by the main nozzle 2. If the weft 1 is a yarn having a large shrinkage, for example, a spuntex yarn, the solenoid 10 is operated to retract and advance the locking pin 9 once, and then further retract and advance the locking pin 9 once. As a result, the weft 1 for two turns is unwound on the drum 8 by the ejection of the main nozzle 2. The unwinding of the weft 1 for two windings may be performed by a continuous unwinding method, in which two windings are detected by a sensor and unwinding is stopped.
[0037]
In the case of a single weft insertion, when the type of the weft 1 is manually input, the defective yarn removing device 24 adjusts the insertion length of the weft 1 and the weft insertion nozzle in accordance with the type of the weft 1. (Main nozzle 2 and / or auxiliary nozzle 3) operating conditions are determined.
[0038]
The operating conditions of the weft insertion nozzles (main nozzle 2 and / or auxiliary nozzle 3) are changed according to at least one of the injection time, the injection pressure, and the position of the auxiliary nozzle 3 to be operated. The position of the auxiliary nozzle 3 to be in the operation state is specified in a group unit or a single unit. According to the degree of shrinkage of the weft 1, (1) all the auxiliary nozzles 3 Only the three auxiliary nozzle groups are selected. (3) Only the auxiliary nozzle group closest to the yarn supply side and the auxiliary nozzle group adjacent thereto are selected. The operating conditions of the auxiliary nozzle 3 are set according to the type of the weft 1 by simultaneous injection of the auxiliary nozzle 3 to be operated, or relay injection or injection pressure in order from the yarn supply side.
[0039]
FIG. 4 (8): The loom control device 20 rotates the loom forward from 180 degrees to 330 degrees, and cuts the weft 1 on the extension of the main nozzle 2 by the yarn feed cutter 4. At the time of this cutting, the weft 1 is in a stretched state by the injection of the main nozzle 2 and the auxiliary nozzle 3, and is reliably cut. Therefore, in this cutting process, no cutting mistake occurs.
[0040]
FIG. 4 (9): The loom control device 20 and the defective yarn removal control device 24 reversely rotate the loom to the rotation angle of 180 degrees in the cycle of weft insertion failure occurrence, and discharge the defective yarn 1a. Here, the defective yarn removal control device 24 issues an operation command to the weft processing device 18. The weft processing device 18 rotates the winding drum 17 according to an operation command from the defective yarn removal control device 24, winds the defective yarn 1a on the outer peripheral surface of the winding drum 17, and removes the wound defective yarn 1a from the suction device. Suction and discharge by 29.
[0041]
FIG. 4 (10): Finally, the loom control device 20 reverses the loom to a rotation angle of 320 degrees in the cycle before the weft insertion failure occurrence cycle, waits for a restart command, and resumes normal weaving. .
[0042]
The present invention can be applied not only to a mechanical shedding device linked to the main shaft 21 but also to a loom having an electric shedding type shedding device provided as a dedicated motor in a heald frame. The weft processing device 18 does not wind the weft 1 but may employ a suction removal system that sucks the weft 1 and removes the defective yarn 1a. In the case of the suction removal method, if air is jetted from the main nozzle 2 while holding the weft 1 upstream of the main nozzle 2, the weft 1 sucked by the weft processing device 18 is inserted into the weft insertion path. Is done. Further, the weft processing device 18 may be a device provided on the non-yarn supply side. At this time, in order to transfer the defective yarn 1a to the weft processing device 18, the weft 1 connected to the defective yarn 1a is inserted by the nozzle for weft insertion after the defective yarn 1a is taken out. May be changed according to the thread type. The yarn feed cutter 4 may be an electric drive system instead of a mechanical drive system linked to the main shaft 21. In the electric yarn feeding cutter 4, the operation time can be set arbitrarily.
[0043]
As described above, in the process of inserting a new weft 1 into the opening 12 of the warp 11, items to be changed according to the type of the weft 1 are replaced with a change in the length of the weft 1 to be inserted, or The operating conditions of the main nozzle 2 or the auxiliary nozzle 3 or the main nozzle 2 and the auxiliary nozzle 3 in addition to the length of 1. For example, in the case of a yarn having a large shrinkage, the injection time of the main nozzle 2 or the auxiliary nozzle 3 or the injection time of the main nozzle 2 and the auxiliary nozzle 3 is set to be long and the injection pressure is set to be high. The operating conditions of the auxiliary nozzle 3 are as follows: depending on the type of the weft 1 in addition to the injection time and the injection pressure, the auxiliary nozzle 3 to be operated is: For all the auxiliary nozzles 3, (2) only for the three auxiliary nozzles on the yarn supply side, and (3) only for the three auxiliary nozzles on the yarn supply side and the three auxiliary nozzles next to it. Let it be set. The operating conditions of the auxiliary nozzle 3 can be set by simultaneous injection of the auxiliary nozzle 3 to be operated or by relay injection in order from the yarn supply side, depending on the type of the weft 1. The characteristics of the weft 1 resulting from the type of the weft 1 include, in addition to the shrinkage, the strength of the weft 1, the thickness of the weft 1, or the degree of fluffing. May be set.
[0044]
Of course, any prerequisite defective yarn removing method is the subject of the present invention as long as it includes a process of inserting the weft 1 into the opening 12 of the warp 11 when removing the defective yarn 1a.
[0045]
【The invention's effect】
In the present invention, in the process of inserting a new weft into the opening of the warp, one or both of the insertion length of the weft and the operating condition of the weft insertion nozzle are changed according to the type of the weft, so Since the weft is inserted into the warp opening under appropriate insertion conditions according to the type of the weft, the weft insertion operation can be performed accurately, and the work of removing the defective yarn can be performed reliably.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram when weaving different types of weft yarns of different types by wefting different types of wefts 1 in a predetermined order by an air-jet loom for weaving multicolor (three colors). .
FIG. 2 is a block diagram of a control system of an air jet loom for weft insertion of multicolor (three colors).
FIG. 3 is an explanatory view of the operation order (1) to (6) of the method for removing a defective yarn in a different kind of weft yarn of the present invention. In these figures, the left side shows the rotation angle of the main shaft of the loom, the right side shows the weaving structure, and the middle part on the left and right shows the situation of wefts and defective yarns.
FIG. 4 is an explanatory view of the operation order (7) to (10) following the operation order (1) to (6) of FIG. 3 in the method for removing defective yarn in a different kind of weft yarn of the present invention. In these figures, the left side shows the rotation angle of the main shaft of the loom, the right side shows the weaving structure, and the middle part on the left and right shows the situation of wefts and defective yarns.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Weft 1a Defective yarn 2 Main nozzle 3 Auxiliary nozzle 4 Thread feed cutter 5 Thread supply body 6 Length measuring and storing device 7 Rotating yarn guide 8 Drum 9 Locking pin 10 Solenoid 11 Warp 12 Opening 13 Reed 14 Woven fabric 15 Pin 16 Blow-up nozzle 17 take-up drum 18 weft processing device 19 feeler 20 loom control device 21 main shaft 22 rotation detector 23 weft selection device 24 defective yarn removal control device 25 main weft insertion device 26 auxiliary weft insertion device 27 driver 28 driver 29 suction device 30 Solenoid on-off valve 31 solenoid on-off valve 32 solenoid on-off valve 33 pressure control valve 34 pressure control valve 35 pressure source 36 defective yarn removing device

Claims (9)

Inserting a new weft into the warp opening by the weft insertion nozzle with the defective yarn connected to the defective weft insertion connected to the main nozzle for weft insertion, then pulling the defective yarn and removing it from the opening of the warp In the method of removing defective yarn
A defective yarn removing method characterized by changing at least one of a weft insertion length and an operating condition of a weft insertion nozzle in a process of inserting a new weft into an opening of a warp according to a type of a weft. In the case of multicolor weft insertion, in which wefts of different types are inserted, the type of the defective weft is determined according to the defective weft insertion, and the insertion length of the weft and the operation of the nozzle for the insertion are determined in accordance with the type. The method according to claim 1, wherein at least one of the conditions is determined. In the case of single weft insertion, by manually inputting the type of weft, at least one of the insertion length of the weft and the operating condition of the nozzle for weft insertion is determined corresponding to this type. The method for removing a defective yarn according to claim 1. The operating condition of the weft insertion nozzle is changed by at least one of an injection time, an injection pressure, and a selection form of an auxiliary nozzle to be in an operation state among a plurality of auxiliary nozzles. The method for removing a defective yarn according to any one of the above. After inserting a new weft into the warp opening with the weft insertion nozzle in a state where the defective yarn associated with the poor weft insertion is connected to the main nozzle for weft insertion, the defective yarn is pulled by the weft processing device and the In the defective yarn removing device that removes from the opening,
The defective yarn removing device includes a defective yarn removing control device. The defective yarn removing control device includes a weft insertion length and a working condition of a weft insertion nozzle in a process of inserting a new weft into the warp opening. A defective yarn removing device, wherein at least one of the insertion conditions is set for each type of weft, and any one of the insertion conditions can be selectively set. 6. The defective yarn removing device according to claim 5, wherein the defective yarn removing control device determines the type of the defective weft, determines a corresponding insertion condition, and performs the insertion of the weft based on the determined insertion condition. 7. The defective yarn removing device according to claim 6, wherein the defective yarn removing control device determines the type of the defective weft based on a weft selection signal output in a predetermined order. 6. The defective yarn removing device according to claim 5, wherein the defective yarn removing control device performs the insertion of the weft yarn based on a predetermined insertion condition. The defective yarn according to any one of claims 5 to 8, wherein the operating condition of the weft insertion nozzle is at least one of an injection time, an injection pressure, and a mode of selecting an auxiliary nozzle to be operated. Removal device.

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