JPH03220344A - Method for treating weft in loom - Google Patents

Abstract

PURPOSE:To surely, efficiently perform the automatic treatment of a weft by detecting whether the weft can be drawn out from a weft supplier or not on the generation of the breakage of the weft and subsequently selecting a weft- freating operation on the detection result. CONSTITUTION:When the breakage of a weft is occurred, whether the weft 4 can be drawn out from a weft supplier 3a now used or not is confirmed to justify the quaneity of the weft supplier 3a. When the weft 4 can be drawn out from the weft supplier 3a, the weft drawn out from the weft supplier 3a is subjected to treatments such as the picking or discharging of the weft. When the weft 4 can not be drawn out, a new weft is drawn out from any other weft supplier 3a and the picking operation of the new weft is executed for a drum type length-measuring and storing device 5, a main nozzle 7, etc.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is designed to prevent yarn breakage from occurring between the weft yarn feeder and the main nozzle, when yarn breakage occurs between the weft yarn feeder and the main nozzle. The present invention relates to a method of determining the possibility of re-drawing the weft yarn from the electric yarn supplying body and selectively performing necessary yarn processing depending on whether or not it is possible to pull out the weft yarn again.

[Conventional technology and its problems]

In response to the demand for labor savings, weft thread guidance and threading are also automated. For example, Japanese Patent Application Laid-Open No. 1-118644 discloses a technique in which when a yarn breakage occurs between the yarn supplying body and the main nozzle, the end of the weft yarn connected to the yarn supplying body is drawn back to the main nozzle using airflow. are doing.

However, according to the above technology, when the cause of yarn breakage is due to a defect in the yarn supplying body itself, that is, when the weft yarn cannot be unwound from the yarn supplying body or is difficult to unwind due to large unwinding resistance. , subsequent threading operations cannot be performed, which is a major obstacle to automation.

On the other hand, Japanese Patent Application Laid-Open No. 61-64673 discloses that when yarn breakage occurs between the yarn supplying body and the main nozzle, the weft yarn is pulled out from a new yarn supplying body. However, when a yarn breakage occurs, the weft yarn is always pulled out from a new yarn supplying body, so new yarn supplying bodies must be supplied frequently, and the replenishment work becomes more complicated.

[Purpose of the invention]

Therefore, an object of the present invention is to reliably and efficiently automatically process the weft yarn according to the state of the yarn feeder on the yarn breakage side after yarn breakage occurs, thereby solving the above-mentioned drawbacks of the prior art.

[Means for solving the invention]

In the weft processing method of the present invention, when a yarn breakage occurs between the yarn supplying body and the main nozzle, a traction force is applied to the cut yarn on the yarn supplying body side in the pulling direction, so that the weft continues to be processed from the yarn supplying body. The weft yarn is continuously pulled out from the yarn supplying body, for example, by applying an airflow in the pulling direction within the guide path, or by pulling the cut yarn in the pulling direction while gripping the cut yarn. When it is possible to pull out the weft thread, thread the weft thread from the thread feeder in use.
When performing yarn processing such as yarn discharge, or when yarn cannot be pulled out from the yarn feeder in use, the weft yarn is newly pulled out from another yarn feeder and transferred to the drum-type length measuring and storage device, main nozzle, etc. I try to perform the necessary threading motion.

〔Example〕

1 and 2 show a weft thread guiding device l according to the invention.

This weft thread guide device 1 pulls out the weft thread 4 from two yarn feeders 3a and 3b, measures the length of the weft thread 4 necessary for weft insertion with a fixed drum type length measuring and storage device 5, and waits until the time of weft insertion. It is stored and supplied to the main nozzle 7 of the loom. Note that a blow-up nozzle 51 is provided on the tip side of the main nozzle 7 in case of a horizontal insertion error. This blow-up nozzle 51 is connected to a pressure air source 53 via an electromagnetic valve 52.
It is connected to the main nozzle 7, is arranged in a direction perpendicular to the main nozzle 7, and corresponds to the yarn discharge processing device 54. Note that a thread breakage sensor 67 is provided on the entrance side of the main nozzle 7.

Between the two yarn supplying bodies 3a and 3b, the weft yarn 4 is tied at the winding start part and the winding end part, and for example, from one yarn supplying body 3a to the yarn guiding path inside the yarn guide tube 6. and is led to the fixed drum type length measurement storage device 5.

The yarn feeders 3a and 3b are each supported in a predetermined direction by a stand 8, and the weft yarn 4 is
It is held in a straight line by two clampers 9,
Moreover, between these two clampers 9, two forces/cutter 10 are used to allow cutting near each clamper 9. Note that these clampers 9 and cutters 10 are connected to par 1 of the stand 8, respectively.
1 and is supported in a position adjustable manner.

In the retracted position shown by the solid line in FIG. 1, the thread guide tube 6 is supported with the two supports of the fixed frame 12 placed on the fixture 22, and is rotatably provided on the frame 12. A parallel link mechanism consisting of two pins 13 attached to the thread guide tube 6, two pins 14 of the fitting 16, and a parallel link 15 of equal length connecting these pins 13 and L4. , it is supported in a horizontal state so as to be able to move in parallel from the retracted position to the forward position shown by the two-dot chain line near the weft thread 4 between the two clampers 9. The pin 13 of one link 15 is on the drive side and is fixed to one end of the drive arm 17. The other end of the drive arm 17 is rotatably connected to the piston rod 19 of the drive cylinder 18 by a connecting pin 20.

The drive cylinder 18 is swingably supported by a horizontal support shaft 21 on the back side of the frame 12.

The yarn guide tube 6 forms a yarn guide path in the hole portion of the pipe, and a suction nozzle 23 is attached to the tip portion thereof. As shown in FIG. 3, this suction nozzle 23 is fixed to the thread guide tube 6 at one end of a nozzle tube 24, and is provided with a nozzle body 25 at the tip side of this nozzle tube 24, and two It is configured by combining two nozzle bodies 26 and 27, and air 37 is taken in from the intake port 28 and passed through the annular space 27a formed in the nozzle body 27 and the hole 24a formed in the nozzle pipe 24 to the nozzle pipe 24. By injecting air 37 within the nozzle body 25 in the direction of the arrow, a pneumatic traction force is generated in the yarn guide path inside the nozzle body 25. Note that, for example, a photoelectric type unidentified sensor 66 is incorporated in the middle portion of the nozzle pipe 24, for example.

The rear end portion of this thread guide tube 6 is shown in FIGS. 1 and 2.
In addition to the figures, as shown in detail in FIG. 4, it is provided at a position where it comes into contact with the main body 29. This main body 29 has an internal hole 30
One end of the nozzle tube 56 inserted into the tube faces the rear end of the yarn guide tube 6, and the other end of the nozzle tube 56 inserted into the It communicates with the inside of the hollow rotating shaft 31 of the storage device 5, and branches at the middle part to form a discharge hole 33 of the discharge pipe 32.
It is also familiar. Note that, for example, a photoelectric yarn breakage sensor 64 is incorporated on the entrance side of the main body 29.

The holding nozzle 55 is concentrically combined with the rear end of the nozzle pipe 56 to form a guide path for the weft thread 4, and supplies pressurized air 60 at an appropriate pressure from the air intake port 59. By introducing pressure air 6o into the hole 30 and injecting it in the direction of the arrow from the gap between the inner peripheral surface of the nozzle pipe 56 and the outer peripheral surface of the nozzle 55, the inside of the nozzle pipe 56 is aligned with the guiding direction of the weft thread 4. Generates airflow in the opposite direction. Note that the air intake port 59 is connected to the control section 61. This control section 61 has a built-in pressurized air source 62, and supplies pressurized air 6o to the air intake port 59 through a solenoid valve 63. The solenoid valve 63 is driven by a driver 65 with a timer function that is operated by the outputs of the ballooning sensors 2a and 2b.

Here, the ballooning sensors 2a and 2b are used between the yarn supplying bodies 3a and 3b to the fixed drum type weft yarn length measuring and storage device 5 to determine which yarn supplying bodies 3a and 3b are being fed. In order to detect whether or not the weft yarn 4 is being pulled out, as shown in FIG. It has been incorporated.

In addition, in this embodiment, the discharge pipe 32 is connected to the hole 30 of the main body 29 in order to satisfy the condition of slip resistance against the weft thread 4.
An acute angle is formed at the portion on the yarn supplying body 3 side, that is, on the yarn guide tube 6 side. The discharge pipe 32 is provided with a suction nozzle pipe 34 and a suction nozzle body 35 concentrically therein.
It is fixed by a ring-shaped cover 36. In addition,
When a fluid traction force is generated, air 37 is sent into the outer space of the suction nozzle body 35 from the intake port 38 inside the suction nozzle pipe 34 . The central opening of the suction nozzle pipe 34 is
It faces the guide tube 39 attached to the cover 36 with an appropriate distance therebetween.

Further, a cutter 40 is arranged near the cover 36 and on the opening side of the suction nozzle pipe 34. This cutter 40
is attached to the discharge pipe 32 by a cutter holder 41, and can be driven by a solenoid 42 or the like.

Next, as shown in FIG. 1, the fixed drum type length measurement and storage device 5 is configured such that a rotary yarn guide 44 rotates around the outer periphery of a drum 43 in a fixed (stationary) state, for example, in the shape of a cage. Note that the rotating yarn guide 44 is attached to the tip of the support tube 70.

The support tube 70 is attached so that its rear end communicates with the center hole of the rotating shaft 31, and rotates together with the rotating shaft 31 driven by the motor 45. When storing length measurement, weft thread 4
is locked on the outer peripheral surface of the drum 43 by a locking pin 46, and is released when the locking pin 46 is retreated by a solenoid 47.

Note that the motor 45 is connected to the controller 4 as shown in FIG.
8 at a predetermined speed via a driver 49, and rotationally controlled by an encoder 50 under feedback control.

During the yarn feeding operation, the weft yarn 4 is pulled out from the yarn feeding body 3a, for example, and passes through the inside of the yarn guide tube 6 and the nozzle tube 5 as a yarn guide path.
6. From the nozzle 55 and the guide hole 58, through the rotating shaft 31 and the inside of the support tube 70, and passing through the rotating yarn guide 44,
It is locked by a locking pin 46 and guided to the main nozzle 7 of the loom.

During the length measurement storage operation, the rotating yarn guide 44 is moved by the motor 4.
5, the winding is driven in the direction, and by rotating around the stationary drum 43, the weft/thread 4 is pulled out from the yarn feeder 3a, and the locking pin 46 is placed on the drum 43.
The length is measured by winding the weft thread 4 while the weft thread is locked at the weft drum 43, and the weft thread is stored on the drum drum 43 until the weft insertion timing. When the locking pin 46 is driven by the solenoid 47 and retreats from the outer peripheral surface of the drum 43 at the weft insertion timing, the weft 4 is released from the drum 43 and becomes ready for weft insertion by the main nozzle 7.

While the fixed drum length measurement storage device 5 is in operation, the suction nozzle 2
3 to the drum 43, when the weft yarn 4 breaks, for example, in the middle of the yarn guide tube 6, the weft yarn 4 is no longer pulled out from the yarn feeder 3a, so the ballooning sensor 2a is moved to the sensor 2a position. Regardless of whether there is thread or not, it detects the condition, generates a thread breakage signal, generates a stop signal to the control system of the loom, and immediately stops the loom. By stopping the motor 45 of No. 5, the length measurement storage operation is stopped. At this time, the thread breakage sensor 64 also outputs a thread absence signal.
In other words, a thread breakage signal is output. Even after entering the stop operation, the rotating yarn guide 44, support tube 70, and motor 45 continue to rotate for a while due to their inertia, and eventually stop at a predetermined stop position. The control system of the loom is
It is assembled by a computer and contains programs for various operating modes.

During this stopping process, centrifugal force acts on the air inside the support tube 70 and the weft yarn 4, in other words, on the cut yarn of the drum 43,
An airflow in the direction in which the weft yarn 4 is drawn out is generated between the inside of the hollow shaft 31 and the rotating yarn guide 44 . For this purpose, a support tube 70 in which the yarn guide tube 6, the nozzle tube 56, the nozzle 55, the rotating shaft 31 and the rotating yarn guide 44 are provided.
In addition to the airflow, the weft yarn 4 inside the yarn guide 4 receives a force in the yarn pulling direction due to its own centrifugal force.
Try to move in the direction of jumping out from the tip of 4. However, at the time of yarn breakage, the nozzle 55 generates an airflow in the opposite direction to the drawing direction and sends it into the nozzle tube 56, so the yarn guide tube 6, nozzle tube 56 and rotating yarn guide
The weft threads 4 up to 4 are pulled by the air flow in the direction opposite to the drawing direction and do not fly out of the rotating yarn guides 44 but are retained inside them. That is, when thread breakage occurs, the thread breakage signal from the ballooning sensor 2a is
This is the input for dry halo 5. At that point, driver 65
The solenoid valve 63 is activated for a predetermined period of time by a timer function.
By driving and opening the pressurized air source 6
2 is supplied to the outer space of the nozzle 55. Therefore, the nozzle 55 generates an airflow in the direction opposite to the yarn drawing direction inside the hole 30, and applies a traction force to the weft yarn 4 in that part, so that the rotating yarn guide 4
This cancels out the pulling force in the popping direction caused by the rotation of the yarn guide tube 6, the rotating shaft 31, and the support tube 70, and holds the yarn inside the yarn guide tube 6, the rotating shaft 31, and the support tube 70 in a stopped state. Therefore, the weft thread 4 does not protrude more than necessary from the tip of the rotating yarn guide 44, and does not get entangled with the locking pin 46, the weft thread 4 of the main nozzle 7, or other members near them. Although the driver 65 operates the nozzle 55 only during the period of inertia rotation of the rotating yarn guide 44, it can also be operated continuously to continuously apply a traction force to the weft yarn 4 if necessary.

Eventually, when the rotating yarn guide 44 stops, an operation command is given to the electromagnetic valve 52 from the control system of the loom, and the electromagnetic valve 52 is set to the open state, so that the pressurized air 60 from the pressurized air source 53 is It is ejected from the blow-up nozzle 51 and moves the weft yarn 4 at the tip of the main nozzle 7 toward the entrance side of the yarn disposal device 54. At this time, the locking pin 46 is pulled up and the weft thread 4 is set to be unwound on the drum 43, so the weft thread 4 at the tip of the main nozzle 7 passes through the blow-up nozzle 51.
The airflow from the threads is sent into the inside of the thread removal processing device 54. Here, the yarn discharge processing device 54 discharges the fed weft yarn 4 from the yarn guide tube 6 to the rotating yarn guide 44 by winding it up or drawing it in with an air flow. The weft thread 4 between the ends is removed.

After this, the control system of the loom executes a program for yarn processing, and in response to the signal from the yarn confirmation sensor 66, the control system of the loom
After confirming the presence of the weft yarn 4 near the entrance side of the suction nozzle 23, the suction nozzle 23 is operated to generate an air flow in the direction in which the weft yarn 4 is pulled out inside the yarn guide tube 6. During the suction operation of the suction nozzle 23, when the thread breakage sensor 64 turns on or the ballooning sensor 2a starts outputting a rounding signal, confirming the presence of the weft thread 4, that is, the bowing of the weft thread 4, Since it is possible to continue pulling out the weft yarn 4 from the yarn feeder 3a during yarn breakage, the control system of the loom
After that, the weft yarn 4 is pulled out again from the same yarn supplying body 3a, and the weft yarn 4 is pulled out again from the same yarn feeder 3a, and
The threading operation is automatically performed by the threading means of No. 119746.

In addition, when the weft yarn 4 cannot be pulled out from the yarn feeder 3a, the yarn breakage sensor 64 and the ballooning sensor 2a remain off despite the suction operation of the suction nozzle 23, and it is not possible to confirm that the weft yarn 4 has been pulled out. It is determined that the body 3a is defective, and the control system of the loom removes the discharge means such as the nozzle 5.
5 is operated to discharge the cut yarn from the yarn supplying body 3a to the outside through the yarn guide tube 6.

After discharging this weft yarn 4, the weft yarn guide device 1 pulls out the weft yarn 4 from a new yarn supplying body 3b and supplies it to the fixed drum length measuring and storage device 5. First, the drive cylinder 18 operates to extend the piston rond 19, and by rotating the drive arm 17 counterclockwise in FIG. The suction nozzle 23 is moved in parallel to approach the weft thread 4 between the two clampers 9. In this state, the suction nozzle 23
The air 37 generates a traction force in the suction direction, that is, the guiding direction of the weft thread 4 at the tip of the nozzle body 25, thereby drawing the weft thread 4 between the clampers 9. During this drawing, the cutter 10 on the yarn supplying body 3a side which is cutting the yarn cuts the weft yarn 4 between the two clampers 9. As a result, the weft yarn 4 on the new yarn supplying body 3b side is transferred to the suction nozzle 23.
The fiber is taken into the interior of the fiber tube 6, and due to its pulling force, it is removed from the clamper 9 and drawn into the interior of the fiber pipe 6. Thereafter, the suction nozzle 23 stops the suction operation, and the thread guide tube 6 returns to the retracted position, and is connected to the nozzle tube 56 of the main body 29 at the rear end portion.

At this time, the weft yarn 4 inside the yarn guide tube 6 rides on the flow of air 37 by the suction nozzle 23 that has started operating again, passes through the nozzle 55, the guide hole 58, and the hollow shaft 31, and then passes through the inside of the support tube 70. and is passed through the rotating yarn guide 44. After this, in preparation for later weft insertion, the main nozzle 7
Threading for the drum 43 and preliminary winding for the drum 43 are performed.

In addition, when the weft yarn 4 is cut from the yarn feeder 3a to the yarn guide tube 6, this is determined by detecting the presence of yarn by the yarn breakage sensor 64 and the absence of yarn by the yarn confirmation sensor 66. It is preferable to unconditionally guide the weft yarn from a new yarn supply body 3b. Further, when the weft thread 4 is broken between the fixed drum type length measurement storage device 5 and the weft insertion nozzle 7, this state is detected by the thread breakage sensor 67. In response to the stop control command, the fixed drum second measuring length storage device 5 automatically stops its operation while locking the weft thread 4 on the drum 43 with the locking pin 46. At this time, the ballooning signal is not output from the ballooning sensor 2a. When the weft thread 4 remains on the drum 43 in this stopped state, the controller 48 causes the motor 45 to rotate in order to remove the weft thread 4. While feeding back a rotation amount signal from an encoder 50 provided on the shaft, the rotating yarn guide 44 is rotated at a predetermined speed in a direction opposite to the winding direction by an amount necessary for removal.

At the same time, air 37 is sent into the interior of the intake port 3, and an air traction force in the discharge direction is generated in the discharge hole 33 inside the discharge pipe 32. Therefore, the weft thread 4 inside the main body 29 is bent into a U-shape and drawn into the discharge hole 33 and enters the suction nozzle body 35, where it rides on the air flow and is drawn into the guide tube 39. It is sent out folded in half in the same direction. In this feeding process, the weft yarn 4 is pulled in from the drum 43 side and at the same time is about to be pulled out from the yarn supply body 3a side via the yarn guide tube 6.

However, since the direction in which the discharge hole 33 is formed is set at an acute angle on the yarn guide tube 6 side and set at an obtuse angle on the rotating yarn guide 44 side, the weft yarn 4 is drawn from both ends of the nozzle tube 56 to the discharge hole 33. In the process of bending into the inside in a 0-shape,
Acute angle parts experience a large amount of sliding resistance, so-called bending resistance,
The obtuse angle part experiences less sliding resistance.

As a result, the weft yarn 4 being discharged is not pulled out from the yarn supplying body 3a side, but is pulled back only from the outer periphery of the drum 43, and is efficiently removed from the drum 43 and discharged.

Therefore, in this discharge process, the weft yarn 4 from the yarn supply body 3a is not wasted. Even during this process of discharging the weft thread 4, the locking pin 46 is in contact with the circumferential surface of the drum 43 and remains in a state where the weft thread 4 is locked. Therefore, in the process of discharging the weft thread 4, the weft thread 4 comes into contact with the outer peripheral surface of the locking bin 46 and is discharged while sliding thereon. In this way, the weft yarn 4 is not let out from the yarn feeder 3a side, but is drawn in only from the drum 43 side,
All of the weft yarn 4 wound on the drum 43 is removed from the discharge pipe 3.
2 and is in a state where it is drawn through the guide tube 39. Next, the cutter 40 is operated to cut and remove the loose weft thread 4.

After that, the suction nozzle pipe 35 inside the discharge pipe 32 stops the suction operation, and the suction nozzle 23 generates an air flow in the guide direction of the weft thread 4 inside the yarn guiding pipe 6, so that the nozzle pipe 56 and The weft yarn 4 inside the discharge hole 33 is moved along with the airflow to the rotating shaft 31 and the rotating yarn guide 44.
Move it in the direction of and thread it. The weft yarn 4 threaded through the rotating yarn guide 44 is then threaded through the main nozzle 7 by a device not shown, and is pre-wound on the fixed drum type length measuring and storage device 5 side in preparation for the next weft insertion.

Incidentally, yarn breakage between the length measurement storage device 5 and the main nozzle 7 occurs as a result of the weft yarn being damaged and becoming more likely to break as it becomes difficult for the weft yarn 4 to be unwound from the yarn supplying body 3a. It is also possible. Therefore, when the suction nozzle pipe 35 stops the suction operation and the suction nozzle 23 generates an air flow, it is determined whether a ballooning signal is output from the ballooning sensor 2a, and based on this, the threading operation is performed. Alternatively, the yarn may be taken in from a new yarn supplier 3b.

[Other Examples]

In this embodiment, as shown in FIG. 7, the discharge means is constituted by a yarn locking lever 68 provided near the entrance of the yarn guide tube 6, and the yarn guide means is constituted by a yarn holder 69 that can move forward and backward. Furthermore, a yarn sensor 80 for checking whether or not the weft yarn 4 is pulled out from the yarn supplying body 3 is connected to a suction tube 8 provided opposite to the rotating yarn guide 44 at the stop position.
This is an example of setting it to 1. The thread guide tube 6 in this embodiment is fixedly provided in the same direction as the rotating shaft 31.

At the time of yarn breakage, the suction nozzle 23 is set to the ON state, and an air flow in the drawing direction is generated inside the yarn guide tube 6. On the other hand, even if the suction tube 81 is performing a suction operation, the yarn sensor 80
When it remains off, it is impossible to pull out the weft yarn 4 from the yarn feeder 3a in use. Therefore, as a discharge means, the motor 71 is driven to rotate the yarn locking lever 68. Then, the weft yarn 4 as a cut yarn on the side of the yarn supplying body 3a in use is discharged from the yarn guide tube 6 to the outside. Note that this discharge state can be confirmed by a change in the signal of the unconfirmed sensor 66. After this ejection, the yarn holder 69 as the yarn blocking means is driven by the air cylinder 73 to move the yarn guide tube 6 from the retracted position.
There, the weft yarn 4 from the new yarn supplying body 3b is opened. After this opening, the suction nozzle 23
starts the suction operation, draws the new weft thread 4 into the inside of the thread guide tube 6, and completes threading through the main nozzle 7 in the same manner as above.

Note that the discharge means may be constructed by installing a blow-up nozzle near the entrance of the suction nozzle 23.

In all of the above embodiments, it is detected whether or not the weft yarn 4 is pulled out from the yarn supplying bodies 3a, 3b by applying airflow in the pulling direction to the cut yarn on the yarn supplying bodies 3a, 3b. The weft yarn may be pulled out not only by airflow but also by a mechanical pulling device 90 as shown in FIGS. 8 and 9.

The traction device 90 mainly includes a low reactuator 92 and a ramper 94 that can be automatically opened and closed. A boss 98 is formed on the rotating shaft 96.
8 and a collar 102 via a torsion spring 100.
is loosely fitted onto the rotating shaft 96. A clamper 94 is supported by the collar 102 via a loft 104. A proximity switch 106 is provided on the boss 98, and a proximity body 108 is provided on the collar 102 so as to face the proximity switch 106. Note that since both members normally have a predetermined distance from each other due to the biasing force of the torsion spring 100, no signal is output from the proximity switch 106.

When a yarn breakage occurs, the rotation of the row actuator 92 guides the clamper 94 to the weft yarn 4 that straddles the yarn supply body and the yarn guide tube 6. Clamper 9 here
4 grips the weft thread 4, and then the row actuator 92 further rotates to move the clamper 94 to pull the weft thread 4 in the drawing direction. At this time, if 4 weft threads are pulled out from the thread feeder 3b, the proximity swivel
Since the relative position between the seventh switch 106 and the proximal object 108 does not change, no signal is output from the proximity switch 106. However, if the weft thread 4 is not pulled out, the proximity switch 1
06 relatively moves toward the proximal body 108 against the biasing force of the torsion spring 100, and this is detected by outputting a signal from the proximity switch 106.

In addition, the traction device may include a clamper (not shown) provided in the yarn guide tube 6 near the entrance, a motor 71, and a locking lever 68 as shown in FIG. That is, with the clamper gripping the cut yarn in the four yarn tubes 6, the motor 71 is rotated to lock the weft yarn by the locking lever 68, and the tension of the weft yarn 4 applied to the locking lever 68 is detected. It may be determined by

〔Effect of the invention] The present invention has the following effects.

When a yarn breakage occurs, it is first checked whether the weft yarn can be pulled out from the yarn supplying body currently in use, and then the quality of the yarn supplying body itself in use is determined. Based on the result of that determination, a different yarn is Since the processing is carried out selectively, automatic thread processing is carried out reliably and efficiently.

Further, since new yarn supplying bodies are not wasted, the operation of replenishing yarn supplying bodies is not performed more than necessary.

[Brief explanation of drawings]

Fig. 1 is a plan view of the weft thread guide device, Fig. 2 is a side view of the support portion of the thread guide tube, Fig. 3 is a sectional view of the suction nozzle, Fig. 4 is a sectional view of the weft thread guide path, and Fig. 5 is a sectional view of the weft thread guide path. FIG. 6 is a front view of the balloon sensor, FIG. 6 is a connection diagram of the motor control system, FIGS. 7 and 8 are plan views of main parts of other embodiments, and FIG. 9 is a partially cutaway side view of the rotating part. be. ■... Weft thread guide device, 2... Yarn feeding device, 2a, 2b...
・Ballooning sensor 3. Yarn feeder, 4. Weft yarn, 5. Fixed drum type length measurement and storage device, 6. Yarn guide tube, 7
Main nozzle, 23 Suction nozzle, 29 Main body, 30 Hole, 31 Hollow shaft, 43 Drum, 4
4...Rotating yarn guide, 45...Motor, 51...
Blowing nozzle, 54... Yarn disposal device, 55... Nozzle, 56... Nozzle pipe, 60... Pressure air, 61... Control unit, 62... Pressure air source, 63... Solenoid valve, 64...
Thread breakage sensor, 66... Unidentified sensor 67... Thread breakage sensor, 69... Thread holder, 70... Support tube, 80...
・Thread sensor. Patent applicant Tsudakoma Kogyo Co., Ltd. Agent
Person Patent Attorney Kunio Nakagawa 2nd Figure 5 Figure 5 b a b a Figure 2 Scroll to the left schiff diagram procedure master book (self-published), March-2, 1990, Bunki Yoshida 1990 Patent Application No. 14784 Weft processing method for loom

Claims (1)

[Claims] When a yarn breakage occurs between the yarn supplying body and the main nozzle, a traction force is applied in the pulling direction to the cut yarn on the yarn supplying body side, and this pulling force is used to remove the weft yarn from the yarn supplying body currently in use. detects whether or not the weft is being pulled out, and when it is possible to pull out the weft from the currently used yarn feeder, executes the subsequent yarn processing operation for the weft from the currently used yarn feeder, and A weft yarn processing method for a loom, characterized in that when it is impossible to pull out the weft yarn from a yarn supplier in use, the weft yarn is newly guided from another yarn supplier.