JPH04108139A - Device for treating fed yarn in jet loom - Google Patents

Abstract

PURPOSE:To carry out threading in high success ratio in end breakage of weft by transferring residual yarn on a winding face through a delivering means to a gripping means, cutting and arranging the yarn in a given length, eliminating the wound residual yarn and inserting the cut and arranged weft into a main nozzle. CONSTITUTION:When end breakage occurs between a weft cheese 3 and a main nozzle 13, a frame is stopped and reversely rotated by a control computer, a blow nozzle 20 for delivery is jetted and a hook pin 9a is opened, a blow nozzle 12 is operated for a given time and residual yarn on a winding face 8b is introduced to a suction pipe 38 and gripped. Then a wound bobbin 8a is rotated, a given amount of weft Y is wound on the winding face 8b, the weft Y is cut and arranged in given fixed length by a cutter 22, cut end Y5 of weft is sucked in a duct 26 by stopping of the blow nozzle 20 and operation of blow nozzles 25 and 30 and removed. The cut residual yarn gripped by a driving roll 41 and a driven roll 43 is sucked in a suction pipe 38, removed and the cut and arranged weft Y is inserted into the main nozzle 13 by jetting flow of a nozzle 16 for inserting.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention provides a method for removing the weft tip in the event of a yarn feeding error such as replacing the weft cheese or cutting the weft between the weft cheese and the main nozzle for inserting the weft. The present invention relates to a yarn feeding and processing device for feeding the yarn to a new weft insertion main nozzle.

[Prior art] This type of yarn feeding and processing device is disclosed in Japanese Patent Application Laid-Open No. 60-2749,
Utility Model Publication No. 1-62375 and Japanese Patent Application Publication No. 1-21343
It is disclosed in Publication No. 7.

In the conventional device disclosed in Japanese Unexamined Patent Publication No. 60-2749, a guide nozzle is disposed between the winding type weft measuring and storing device and the main nozzle for inserting the weft. A guide suction tube is disposed on the side, and the unwrapped yarn on the yarn winding surface is sucked into the guide suction tube and inserted into the guide nozzle.

Utility Model Publication No. 1-62375 and Japanese Patent Application Publication No. 1-21343
In the conventional device disclosed in Publication No. 7, a yarn feeding nozzle is disposed between a winding-type weft length measuring and storage device and a main weft insertion nozzle, and a yarn feeding nozzle is disposed between a weft length measuring and storing device of a winding type and a yarn feeding nozzle. The guide pipe is arranged to be switchable between a guide position and a retreat position, and the weft tip is ejected and inserted from the yarn winding tube of the weft length measuring and storage device into the guide pipe at the guide position. . In order to newly insert the weft tip from the yarn winding tube to the yarn feeding nozzle when there is yarn remaining after winding on the yarn winding surface, measure the remaining yarn on the yarn winding surface while reversing the yarn winding tube. The weft thread is pulled back from the weft length measuring and storage device by a weft removing means in front of the long storage device, and the pulled back weft thread is trimmed and blown into the yarn winding tube again.

[Problems to be Solved by the Invention] However, in the conventional device disclosed in Japanese Unexamined Patent Publication No. 60-2749, the guide suction tube is connected to the winding surface of the weft length measuring and storage device in order to pull out the remaining yarn on the winding surface. However, it is difficult to pull out and remove the remaining yarn on the yarn winding surface using the suction action of the guide suction tube. In addition, since the remaining yarn after winding is inserted directly into the yarn feed nozzle, the weft yarn ejected from the yarn feed nozzle may head toward the main weft insertion nozzle in a tangled state. There is a high risk of failure.

Utility Model Publication No. 1-62375 and Japanese Patent Application Publication No. 1-21343
In the conventional device disclosed in Japanese Patent No. 7, even when the tip of the weft yarn enters the yarn feed nozzle, the remaining yarn is pulled back, which inevitably lengthens the processing time. In addition, in the method of pulling back from the weft length measuring and storing device and threading it again to the weft length measuring and storing device, the rate of weft processing failure increases. Moreover, the configuration in which the weft removal means is installed in front of the weft length measuring and storage device not only complicates the mechanism, but also creates a large bending resistance when pulling back the remaining yarn wound on the yarn winding surface. Pulling back by currents lacks certainty.

Furthermore, none of these conventional devices can cope with yarn feeding errors caused by foreign matter such as fluff clogging the yarn feed nozzle or the main weft insertion nozzle.

SUMMARY OF THE INVENTION An object of the present invention is to provide a yarn feeding processing device that can avoid complication of the mechanism and lengthening of processing time, and can also cope with yarn feeding processing caused by foreign matter clogging in a nozzle. .

[Means for Solving the Problems] For this purpose, the present invention includes a weft gripping means and a mechanical weft pulling means for yarn feeding processing, which are disposed in front of the weft length measurement and storage device, and a a weft passing means for delivering the weft to the weft pulling back means; a weft cutting means for trimming the weft gripped by the weft holding means or the weft delivered to the weft pulling back means; and a weft cut end trimmed by the weft cutting means. A yarn feeding and processing device was constituted by a weft insertion means for inserting the weft yarn into the main nozzle for weft insertion.

[Function] When the main nozzle for weft insertion is clogged with foreign matter such as fluff, and the yarn cannot be fed, the weft delivery means and the weft pullback means are activated, and the weft inserted through the main nozzle for weft insertion is removed from the weft. It is handed over to the retracting action of the retracting means. This pulling back action pulls out the weft yarn that has entered the main weft insertion nozzle, and along with this, foreign matter inside the main weft insertion nozzle is also pulled out. The weft yarn pulled out from the main nozzle for weft insertion is cut and removed by the weft yarn cutting means, and the weft yarn is trimmed to an appropriate length. This trimmed weft cut end is inserted into the main nozzle for weft insertion by the weft insertion means.

When the weft yarn is cut between the weft length measurement and storage device and the weft insertion main nozzle, the weft gripping means is activated and the remaining yarn wound on the yarn winding surface is handed over to the gripping action of the weft gripping means.

The weft held by the weft gripping means is trimmed to an appropriate length by the weft cutting means, and the trimmed weft cut end is inserted into the weft insertion main nozzle by the weft insertion means.

[Example] Hereinafter, an example embodying the present invention will be described based on FIGS. 1 to 11.

A weft yarn unwinding motor 2 is operatively connected to the base end of the rotatably supported holding bracket 1 via a gear mechanism, and a weft yarn unwinding motor 2 is connected to the base end of the holding bracket 1 which is rotatably supported.
The weft unwinding motor 2 is operated to rotate in the weft unwinding direction.

A motor 4 is disposed near the peripheral surface of the base end side of the weft cheese 3, and a support arm 5 is operatively connected to the motor 4. A blow nozzle 6 for unwinding the weft is installed on the support arm 5, and a winding diameter sensor 7 consisting of a reflective photoelectric sensor is also supported. The weft unwinding blow nozzle 6 is connected to a pressure air supply tank (not shown) via a two-way electromagnetic valve V1, and the jet of the weft unwinding blow nozzle 6 is directed to the proximal peripheral surface of the weft cheese 3. The direction is set so as to substantially intersect with the axis of the weft cheese 3 and form a shallow angle with respect to the circumferential surface of the weft cheese 3. As a result, the air jetted from the weft unwinding blow nozzle 6 sweeps the circumferential surface of the weft cheese 3 from the proximal end to the distal end.

In front of the weft cheese 3, there is a wrapping type weft length measuring storage device 8.
The thread-wrapped tube 8a is rotationally driven by a motor 1 that is different from the loom drive motor (as shown).

The weft, which is let out from the thread winding tube 8a as the thread winding tube 8a rotates, is controlled to be pulled out from the thread winding surface 8b by the protrusion and retraction of a locking pin 9a driven by an electromagnetic solenoid 9.

A weft introduction duct 10 is attached to the weft introduction port 8c side that communicates with the thread winding tube 8a.
A yarn breakage sensor 11 consisting of a transmission type photoelectric sensor is installed at the entrance provided on the side of the yarn breakage sensor 11. In addition, a weft insertion blow nozzle 12 is connected to the weft introduction duct 8 in the weft introduction duct 1O.
The pressure air is supplied to the weft insertion blow nozzle 12 by a three-way solenoid valve v.
2. The air flow ejected from the weft insertion blow nozzle 12 is transmitted to the weft inlet 8c of the weft length measuring and storage device 8.
It is blown out toward the weft inserting main nozzle 13 on the sley (as shown) via the thread winding tube 8a that communicates with the thread winding tube 8a.

A conical convergence guide tube 14 is interposed between the weft cheese 3 and the weft length measurement storage device 8, and its large diameter opening is directed toward the weft cheese 3, and its small diameter opening is directed toward the weft introduction duct. 10 entrances facing each other. As a result, the jet air flow from the weft unwinding blow nozzle 6 is substantially introduced into the converging guide tube 14, and the jet air flow introduced into the converging guide tube 14 is introduced into the weft introducing duct 10.

In front of the weft length measuring and storage device 8, an introduction block 15 and a weft guide insertion nozzle 16 are arranged in a coupled state. The main nozzle I3 for weft insertion is pulled out from the bobbin winding surface 8b.
The weft yarn Y that is injected from
You will be guided to 3.

The weft guide insertion nozzle 16 is directed toward the entrance of the weft insertion main nozzle 13 at the most retracted position, which is indicated by a chain line in FIG.

An expulsion pipe 15c is integrally protruded from the lower side of the introduction block 15, and a dust pipe 18 is disposed directly below the expulsion pipe 15c. A crank-shaped suction pipe 38 is arranged on an extension of the dust pipe 18, and a dust box 19 is installed at the end of the suction pipe 38. A blow nozzle 39 is attached to the bent portion of the suction pipe 38, and a suction action is generated in the suction pipe 38 by the jetting action of the blow nozzle 39. The blow nozzle 39 is connected to a pressure air supply tank via a two-way electromagnetic valve V1□.

A weft pull-back motor 4o is installed on the side of the gap between the dust pipe 18 and the suction pipe 38, and an air cylinder 42 is installed downwardly just above the drive roller 41 which is operatively connected to the weft pull-back motor 40. ing. A driven roller 43 is rotatably supported in the drive rod facing the drive roller 41, and can be pressed against the drive roller 41 by the protruding operation of the air cylinder 42. The air cylinder 42 is connected to a pressurized air supply tank via a three-way electromagnetic valve V12.

A blow nozzle 20 for weft delivery is connected to the upper circumferential surface of the introduction block 15 so as to face the removal pipe 15c, and pressurized air is supplied from the pressure air supply tank to the blow nozzle 20 for weft delivery using a three-way valve type. Solenoid valve~
73.

The entrance 15a of the introduction block 15 is formed into a converging taper with a large diameter, and is curved so as to point toward the tip of the winding tube 8a of the weft length measurement and storage device 8 or the entrance 15a of the introduction block 15. The outlet 15b of the introducing block 15 is formed into a converging taper with a small diameter, and the outlet 15b is formed into a convergent taper with a small diameter. It is connected to the pressure air supply tank. Also, the exclusion pipe 15
c, the blow nozzle 21 intersects with the area where the weft transfer blow nozzle 20 and the removal pipe 15c face each other to form the outlet 1.
5b, and the pressure air supply from the pressure air supply tank to the blow nozzle 21 is controlled by a three-way valve type electromagnetic valve V5.

A cutter 22 is interposed between the removal pipe 15c and the dust pipe 18, and the cutter 22 performs an opening/closing operation by the retracting/extending operation of an air cylinder 23. The air cylinder 23 is connected to the pressurized air supply tank via a three-way electromagnetic valve v6.

A thread breakage sensor 24 consisting of a transmission type photoelectric sensor is installed inside the entrance of the main nozzle 13 for weft insertion, and a fixed blade 13a is installed at the top of the tip of the main nozzle 13 for weft insertion. It is fixed so that it slightly protrudes from the tip.

A blow nozzle 25 is located directly below the main nozzle 13 for weft insertion.
The jetting direction is set to intersect with the jetting path of the main nozzle 13 for weft insertion. A weft introduction duct 26 is located directly above the main nozzle 13 for weft insertion.
The outlet 26a is set at a position opposite to the injection port of the blow nozzle 25 across the injection path of the main weft insertion nozzle 13, and the outlet 26b is located at the rear of the main nozzle 13 for weft insertion. It is set in a position that points to

An air kite 27 is installed behind the outlet 26b, and a weft detector 28 consisting of a transmission type photoelectric sensor is installed inside the air guide 27. A suction pipe 29 is installed at the rear of the air kite 27, and the outlet side of the suction pipe 29 is curved toward a dust box (not shown), and a blow nozzle 30 is connected to this curved portion so as to face the dust box. has been done.

The weft insertion main nozzle 13, the blow nozzle 25, the weft introduction duct 26, the air guide 27, and the suction pipe 29 are all mounted on the sleigh, and swing integrally as the slay swings. Each of these members 13, 25, 26,
27. Behind the swing area of 29 is the weft take-up motor 3.
1 is installed, and an air cylinder 33 is disposed facing downward directly above a drive roller 32 operatively connected to a weft take-up motor 31. A driven roller 34 is rotatably supported in the drive rod opposite the drive roller 32, and can be pressed against the drive roller 32 by the protruding operation of the air cylinder 33.

Weft insertion main nozzle 13 and blow nozzle 25.30
are two-way valve type solenoid valves V7° and V8. The air cylinder 33 is connected to the pressure air supply tank via V9, and the air cylinder 33 is connected to the pressure air supply tank via a three-way electromagnetic valve VIO. As shown in FIG. 10, each electromagnetic valve V1 to V1□, motor 2. 4. 31
．． , 40. M and the electromagnetic solenoid 9 are commanded and controlled by a control computer C that is separate from the loom control computer. The control computer C includes yarn breakage sensors 11, 24,
In response to detection signals from the weft detector 28 and the winding diameter sensor 7, the electromagnetic valves V, to VI2 are opened and closed, and the motors 2, 4, 31, 40 . M and electromagnetic solenoid 9
control.

FIGS. 11(a) to (e) show cases in which yarn breakage occurs between the weft cheese 3 and the weft insertion main nozzle 13, and foreign matter clogging in the weft insertion main nozzle 13 or the weft guide insertion nozzle 16. This is a flowchart showing a yarn feeding processing program when a weft insertion error occurs due to the weft insertion error, and the yarn feeding processing work will be explained below according to this flowchart.

1st. Figure 2 shows the feeding path of the weft Y during operation of the loom.

When the weft yarn Y is cut on the yarn feeding path between the weft cheese 3 and the main weft insertion nozzle 13, the yarn breakage sensor 11 or 2
4 checks this yarn breakage and sends a yarn feeding error detection signal to the control computer C.

The control computer C sends a loom stop signal to the loom control computer in response to this yarn feeding error detection signal, and the loom control computer issues a loom stop command in response to this signal. This allows the main nozzle 1 for weft insertion on the slay to
3 stops near the front position of the woven fabric. After the loom is stopped, the loom control computer commands the loom to be reversed by a predetermined amount, and the main weft insertion nozzle 13 is stopped at the most retracted position (threading position) in the swing area shown by the chain line in FIG. After the machine is reversed, the control computer C activates the solenoid valve V3. A command is given to excite Vll, and then a command is given to excite the electromagnetic solenoid 9. As a result, the blow nozzle 20.39 injects the locking pin 9a.
is separated from the thread winding surface 8b.

The weft yarn Y is passed through the weft length measuring and storage device 8 and the main nozzle for weft insertion 1
3, the control computer C recognizes the yarn breakage based on the weft presence detection signal from the yarn breakage sensor 11, and instructs the electromagnetic valve V2 to be energized for a predetermined period of time. As a result, the blow nozzle 20 for weft bowing blows, and the blow nozzle 12 for weft insertion blows for a predetermined period of time.

When the weft yarn Y is cut between the weft guide insertion nozzle 16 and the main weft insertion nozzle 13, the tip of the weft yarn Y is discharged from the removal pipe 15c into the dust pipe 18 and suctioned by the jet stream from the weft transfer blow nozzle 20. pipe 38
introduced into the world. By separating the locking pin 9a from the thread winding surface 8b, the remaining yarn wound on the thread winding surface 8b is released from the locking action of the locking pin 9a, and is moved to the introduction block 15 by the jet stream from the weft insertion blow nozzle 12. It is blown away. The thread winding tube 8a is directed toward the inlet 15a of the introduction block 15, and the jet stream from the weft thread insertion blow nozzle 12 is blown into the introduction block 15 from the thread winding tube 8a almost at the same time. Due to this blowing action, the remaining yarn to be wound on the yarn winding surface 8b is introduced into the introduction block 15 and delivered to the gripping action of the blow nozzle 20 for weft yarn delivery and the suction pipe 38.

The weft Y is connected to the weft length measuring and storage device 8 and the weft guide insertion nozzle 16.
Even when the yarn is cut between the lines, the electromagnetic valves V31 and V11 are energized, the electromagnetic solenoid 9 is energized, and the electromagnetic knob V2 is energized for a predetermined period of time, and the remaining yarn wound on the bobbin winding surface 8b flows into the suction pipe 38. guided grasp.

When the weft insertion blow nozzle 12 has finished spraying for a predetermined period of time, the control computer C instructs the electromagnetic solenoid 9 to be demagnetized, and the locking pin 9a engages with the thread winding surface 8b. After the locking pin 9a engages with the bobbin winding surface 8b, the control computer C commands the motor M to operate by a predetermined amount, and the bobbin winding tube 8a rotates around the bobbin winding surface 8b by a predetermined amount. As a result, a predetermined amount of the weft Y2 is pre-wound on the thread winding surface 8b.

After weft preliminary winding, the control computer C instructs the electromagnetic valve V6 to be excited and demagnetized, and the cutter 22 performs opening and closing operations. As a result, as shown in FIG. 9, the weft held by the jet action of the weft delivery blow nozzle 20 and the suction action of the suction pipe 38 is cut between the removal pipe 15c and the dust pipe 18, and the weft length measurement is stored. The weft yarn Y1 from the device 8 is trimmed to the length or the set length. This set length is suitable for smooth insertion into the main nozzle 13 for weft insertion. That is, the weft delivery blow nozzle 20 and the suction pipe 38 constitute a weft gripping means for yarn feeding processing.

After the cutting operation of the cutter 22, the control computer C controls the electromagnetic valve V3. A command is given to demagnetize Vll, and the jetting from the weft transfer blow nozzle 20 and the blow nozzle 39 is stopped. Next, the control computer C instructs the electromagnetic solenoid 9 to be energized so that the locking pin 9a separates from the bobbin winding surface 8b. In this state, the control computer C controls the electromagnetic valves Vs, V
9 is commanded to excite, and blow nozzles 25 and 30 are injected. As a result, a weft insertion prevention flow that crosses the injection path of the weft insertion main nozzle 13 is generated between the blow nozzle 25 and the inlet 26a of the weft introduction duct 26, and a suction flow is generated in the suction pipe 29.

The control computer C then controls the solenoid valve 'v-t.

V4. Command the excitation of V5 and weft insertion main nozzle 13
, the weft guide insertion nozzle 16 and the blow nozzle 21. The blow nozzle 21 intersects the area between the weft transfer blow nozzle 20 and the exclusion pipe 15c and is directed toward the outlet 15b of the introduction block I5, and the jet flow from the blow nozzle 21 enters the exclusion pipe 15c. The weft cut end Y1 is blown out from the outlet 15b and transferred to the jetting action of the weft guide insertion nozzle 16. The weft cut end Y is passed to the jetting action of the weft guide insertion nozzle 16.
1 is blown into the entrance of the main weft insertion nozzle 13 by the jet action of the weft guide insertion nozzle 16. Since the weft cut end Y+ is trimmed to an appropriate length, insertion into the weft insertion main nozzle 13 is performed smoothly.

The preliminary winding yarn Y2 on the yarn winding surface 8b is sequentially drawn out by the blowing action of the blow nozzle 21 and the weft guide insertion nozzle 16. The weft cut end Y1 blown into the main nozzle for weft insertion 13 is ejected from the main nozzle for weft insertion I3. The jet flow from the main weft insertion nozzle 13 merges with the jet flow from the blow nozzle 25 and is guided to the weft introduction duct 26, and the weft cut end YI ejected from the weft insertion main nozzle 13 is not inserted. Weft introduction tact 2
6 will be introduced. As shown in Fig. 8, weft cut end Y1
The jet flow from the blow nozzle 25 passes through the gripping area between the driving roller 32 and the driven roller 34, and the weft yarn detector 8
reach the installation position.

If threading to the main weft insertion nozzle 13 fails, the weft cut end Y1 does not reach the installation position of the weft detector 28, or the control computer C
If the weft presence detection information from V5.8 is not obtained within the set time and the number of threading failures does not reach the set number M, the electromagnetic valves v,, V5. V7. V8. Va(7) commands demagnetization and demagnetization of the electromagnetic solenoid 9, the main nozzle for weft insertion I3, the weft guide insertion nozzle 16, and the blow nozzles 21, 25, 30 stop spraying, and the locking pin 9
a engages with the bobbin winding surface 8b. Next, the control computer C commands the excitation of the electromagnetic valve V3 and also commands the motor M to operate by a predetermined amount.

Even though threading has failed, the weft has passed through the introduction block 15, and the weft is held on the dust pipe I8 side by the injection of the blow nozzle 20 and blow nozzle 39 for weft passing through the excitation of the electromagnetic valve V 31 V + +. be done. As a result, a predetermined amount of weft is pre-wound on the thread winding surface 8b. Thereafter, cutting by the cutter 22, separation of the locking pin 9a, blocking of weft insertion by jetting from the blow nozzles 25 and 30, and threading by jetting from the main weft insertion nozzle 13, the weft guide insertion nozzle 16, and the blow nozzle 21 are performed as described above. It is carried out in the same way. When the number of threading failures reaches the set number M, the control computer C instructs the alarm device 35 to issue an alarm.

If the threading is successful, the control computer C activates the electromagnetic valve V based on the weft presence detection information from the weft detector 28.
4, demagnetize Vs, Vt, Va and demagnetize the electromagnetic solenoid 9, stop the jetting of the weft insertion main nozzle 13, the weft guide insertion nozzle 16, and the blow nozzle 21, 25, and stop the locking pin 9a or the bobbin winder. It engages with the attached surface 8b. Next, the control computer C commands the excitation of the electromagnetic valve VIO, and the air cylinder 33 is operated to protrude. As a result, the driven roller 34 is joined to the driving roller 32, and the ninth
As shown in the figure, the weft cutting end Y1 is at both rollers 32.34.
grasped between. Subsequently, the control computer C instructs the motor M to operate by a predetermined amount, and the thread-wrapped tube 8a rotates by a predetermined amount. As a result, a predetermined amount of the weft yarn is pre-wound on the yarn winding surface 8b.

After this preliminary winding, the control computer C instructs the weft take-up motor 31 to operate. As a result, the weft cut end Y1
is taken up by both rollers 32 and 34, and due to the tension of this take-up, the weft Y1 is subjected to the cutting action of the fixed blade 13a on the main nozzle 13 for weft insertion, and is cut and separated from the main nozzle 13 for weft insertion. This cut piece is attached to both rollers 32
, 34 and the blow nozzle 30
The dust is discharged to a dust box (not shown).

When all the cut pieces have passed through the air guide 27, the control computer C stops the operation of the weft take-up motor 31 based on the no-weft detection information from the weft detector 28, and instructs the electromagnetic valve VIO to demagnetize. This causes the weft take-up motor 31 to operate or stop, and the air cylinder 33
Then, the driven roller 34 separates from the driving roller 32 due to the retraction operation.

Next, the control computer C commands demagnetization of the electromagnetic valve v9, and the injection of the blow nozzle 30 is stopped. Thereafter, the machine rotates to the starting position and prepares for restarting the machine.

When the weft Y is cut between the weft cheese 3 and the weft length measurement and storage device 8, the control computer C recognizes this cut based on the no-weft detection information from the thread breakage sensor 11.

Based on this understanding of weft cutting, the control computer C stops and reverses the machine, energizes the electromagnetic valve V31VI+, energizes the electromagnetic solenoid 9, and energizes the electromagnetic valve V2 for a predetermined time, and then executes a different processing program from the above. By energizing the electromagnetic valves V3 and V11, energizing the electromagnetic solenoid 9, and energizing the electromagnetic valve V2 for a predetermined period of time, all of the remaining yarn wound on the yarn winding surface 8b is removed to the dust box 19.

After energizing the electromagnetic valve v2 for a predetermined time, the control computer C controls the operation of the motor 4 based on the winding diameter information from the winding diameter sensor 7, and controls the operation of the weft unwinding blow nozzle 6 or the weft cheese 3.
It is placed at a position an appropriate distance away from the circumferential surface of. Next, the control computer C commands the excitation of the electromagnetic valves Vl and V2, and the blow nozzle 6 for unwinding the weft and the blow nozzle 12 for inserting the weft blow. And control computer C
commands the operation of the weft unwinding motor 2. As a result, the weft cheese 3 rotates in the weft unwinding direction while receiving the jet action of the weft unwinding blow nozzle 6, and the weft tip on the weft cheese 3 is peeled off from the circumferential surface of the weft cheese 3, and the weft unwinding It is carried into the convergence guide tube 14 by the jet flow from the blow nozzle 6. The jet flow from the weft unwinding blow nozzle 6 is directed to the weft introduction duct hlO by the convergence action of the convergence guide tube 14.
The weft tip portion peeled off from the weft cheese 3 is introduced into the weft introduction duct 10. The weft tip introduced into the weft introduction duct IO is blown out from the yarn winding tube 8a by the jet flow of the weft insertion blow nozzle 12,
The receiver is transferred to the gripping action of the weft transfer blow nozzle 20 and the suction pipe 38.

If threading fails, such as when the weft tip does not pass through the weft length measuring and storage device 8, the control computer C detects whether the weft tip does not reach the dust pipe 18 or detects whether the weft yarn is present from the yarn breakage sensor 11. If the detection information cannot be obtained within the set time, the electromagnetic solenoid 9 is demagnetized, the weft unwinding motor 2 is stopped, and the electromagnetic valves V+, V2, V
3. Instruct the demagnetization of V++ and also instruct the alarm device 35 to issue an alarm.

When the weft presence detection information is obtained from the yarn breakage sensor 11, the control computer C instructs to demagnetize the electromagnetic solenoid 9, stop the operation of the weft unwinding motor 2, and close the electromagnetic valves Vl and V2. The processing after preliminary winding by the operation of is performed in the same manner as described above.

In the above series of yarn feeding processing operations, in any state where yarn breakage occurs, the remaining yarn wound on the yarn winding surface 8b is removed from the removal pipe 1.
5c, is discarded via the dust pipe 18 and suction pipe 38. That is, the removal of the winding remaining yarn is carried out by the injection of the weft transfer blow nozzle 20, the separation of the locking pin 9a from the yarn winding surface 8b, and the weft insertion blow for transferring the weft to the gripping action of the weft transfer blow nozzle 20. The process is always the same: ejection from the nozzle 12 for a predetermined period of time. Therefore, the processing program is simplified compared to the case where the contents of the removal process for the wrapped remaining yarn correspond to the yarn breakage occurrence state, and the weft yarn detector for changing the contents of the removal process for the wrapped remaining yarn is almost No longer needed. Moreover, the weft length measuring storage device 8
Since the unwrapped yarn is not pulled back to the weft cheese 3 side or removed via the weft insertion main nozzle 13, it is not necessary to rethread the yarn into the weft length measurement storage device 8 or the weft insertion main nozzle 13. There are fewer failures in the yarn feeding process due to this, and the success rate of the yarn feeding process is improved.

The unwrapped yarn that is quickly removed to the dust box 19 is trimmed to an appropriate length by the cutter 22, and this trimming improves the success rate of threading into the weft insertion main nozzle 13.

The above may be due to a yarn feeding error due to yarn breakage between the weft cheese 3 and the weft insertion main nozzle 13, or the yarn feeding may be caused by the fluff getting stuck at the entrance of the weft insertion main nozzle 13 or the weft guide insertion nozzle 16. If this is not possible, the process is as follows.

When a weft insertion error detector (not shown) installed at the weft insertion end side detects a weft insertion error, the control computer C energizes the electromagnetic valve V for a predetermined period of time and stops the loom. Until the loom stops, the weft yarn Y5, which has been inserted incorrectly, and the following weft yarn Y4 are maintained connected without being cut. The trailing weft Y4 is ejected from the weft insertion main nozzle 13, or the trailing weft Y4 is ejected from the blow nozzle 25 into the introduction duct 26.
and reaches the suction pipe 29. The weft detector 28 detects the following weft Y4, and the control computer C activates the electromagnetic valve V9. based on this surplus detection information. v1
o is excited, and the take-up motor 31 is activated.

As a result, the roller pair 32 and 34 take up the following weft yarn Y4, and due to this pulling tension, the following weft yarn Y4 or the fixed blade 1
3a. Then, the misplaced yarn Y5 on the front of the woven fabric is pulled out using the following weft yarn Y4 as a clue, and when all the misplaced yarns Y5 pass the installation position of the weft yarn detector 28, the weft yarn detector 28 detects the absence of yarn. Based on this thread non-detection information, the control computer C operates the solenoid valve "9 +
(2) Commands are given to demagnetize the to and stop the operation of the take-up motor 31, and the weft insertion error process is completed.

If the entrance of the main weft insertion nozzle 13 or the weft guide insertion nozzle 16 is clogged with fluff, it becomes impossible to eject and insert the weft from the main weft insertion nozzle 13, and the occurrence of a weft insertion error is detected. Upon detection of this weft insertion error, either the blow nozzle 25 blows or the weft detector 28 does not detect the surplus. If the weft detector 28 cannot detect a surplus within a predetermined time despite the occurrence of a weft insertion error, the control computer C performs the following yarn feeding process including the fluff removal process.

First, the electromagnetic valve VllIV3 and the electromagnetic solenoid 9 are energized to inject the blow nozzle 39, 20, and the locking pin 9a is separated from the bobbin winding surface 8b. Locking pin 9a
After separating, the electromagnetic valve 2 is energized for a predetermined time and the blow nozzle 12 injects for a predetermined time. As a result, the thread winding surface 8b
The upper winding yarn Y3 is removed from above the winding surface 8b and introduced into the introduction block 15, and as shown in FIG.
3 is held in the suction pipe 38 by the jet action of the blow nozzle 39 and the suction action of the suction pipe 38. In this state, the weft yarn Y4 following the weft yarn Y5, which has been inserted incorrectly due to the fluff clogging, continues to enter the main weft insertion nozzle 13 due to the fluff clogging. After suctioning and gripping the excluded winding yarn Y3, demagnetize the solenoid valve V3 and blow the blow nozzle 2.
0 injection or stop.

Next, the electromagnetic valve V12 is energized, and as shown in FIG. 4, the drive roller 41 and the driven roller 43 grip and join the removed yarn Y3. In this joined state, the pull-back motor 40 is operated, and the pair of rollers 41 and 43 take up the removed yarn Y3. Due to this pulling action, the introduction block 15
The subsequent weft Y further ahead is also pulled back toward the dust pipe 18 side.

The weft yarn Y5, which was mis-inserted due to the weft clogging, is reeded on the front of the woven fabric in the same way as a normal weft-insertion error, and the following weft yarn Even if you bow Y4, it is difficult to pull out the wrong yarn on the front of the fabric. If the following weft yarn Y4 is pulled by the rotational pulling action of the roller pair 41 and 43, the missed yarn Y5 can be pulled out from the woven fabric. Furthermore, the fluff that is clogged within the nozzle is entangled with the trailing weft Y4, and the fluff can be reliably removed from the nozzle together with the trailing weft Y4.

As shown in FIG. 5, when the tip of the missing yarn Y5 connected to the following weft Y is completely pulled out from the main weft insertion nozzle 13, the yarn breakage sensor 24 detects the absence of yarn. The control computer C controls the pullback motor 4 based on this yarn non-detection information.
At the same time, the electromagnetic valve V1□ is demagnetized and the roller pairs 41 and 43 are separated. Then, the electromagnetic solenoid 9 is demagnetized and engaged with the locking pin 9a or the bobbin winding surface 8b, and the motor M is rotated by a predetermined amount. As a result, the weft Y6 is pre-wound on the thread winding surface 8b as shown in FIG.

If the number of rotations of the pullback motor 40 has not reached the set number N, the control computer C demagnetizes the electromagnetic valve V+□ to stop the blow nozzle 39 from blowing, and sends an alarm command to the alarm device 35. The set number N represents the length of the misplaced thread Y5 pulled out from the woven fabric, or if the length of the misplaced thread Y5 is short, the weft yarn will break off during weft insertion, and this blown piece will be on the woven fabric. There may be some left. Therefore, N is set in accordance with the maximum length of the blown-off piece or the misplaced yarn that may remain on the woven fabric. This causes the pullback motor 4
If the number of rotations is 0 or does not reach the set number N, an alarm is issued because there is a possibility that a blown piece remains in the fabric.

When the number of rotations of the pullback motor 40 exceeds the set number N, the electromagnetic valves .about.'6 are energized and demagnetized, and the cutter 22 performs a cutting operation. As a result, as shown in Figure 7, the preliminary volume is ¥6
The length of the weft yarn at the tip is trimmed to an appropriate length in the same manner as in the yarn feeding process described above.

Thereafter, as in the case of the yarn feeding process described above, only threading to the main weft insertion nozzle 13 is performed.

Of course, the present invention is not limited to the above-mentioned embodiment, and for example, the blow nozzle 25 for weft delivery of the above-mentioned embodiment
Instead, a means for mechanically delivering the weft to the gripping area of the pair of rollers 41, 43 is adopted, or a weft insertion means for mechanically delivering the weft to the main nozzle for weft insertion 13 instead of the weft guide insertion nozzle 16 of the above embodiment. It is also possible to adopt

Further, the roller pair 41, 43 of the above embodiment is introduced into the block 1.
5 and the weft length measuring and storage device 8.

Furthermore, in the present invention, a yarn breakage sensor is also provided at the entrance 15a of the introduction block 15 in FIG. The configuration is such that it can be determined whether the problem has occurred between the insertion nozzle 16 and the main weft insertion nozzle 13,
When the yarn breakage sensor sends a signal indicating that there is a weft yarn, it is determined that the weft yarn has been cut between the weft guide insertion nozzle 16 and the main weft insertion nozzle 13, and the air flow is only from the blow nozzle 20 for weft yarn transfer. It is also possible to carry out the weft processing operation by injecting the weft yarn.

[Effects of the Invention] As described in detail above, the present invention includes a weft gripping means for yarn feeding and a mechanical weft pulling back means disposed in front of a wrapping type weft length measurement and storage device, and a weft length measurement and storage device. a weft transfer means for transferring the weft from the device to the weft return means;
A yarn feeding and processing device is provided by a weft cutting means for trimming the weft held by the weft pulling back means, and a weft insertion nozzle for inserting the weft cut end portion trimmed by the weft cutting means into a main nozzle for inserting the weft. With this structure, in the event of any yarn breakage, the unwrapped yarn on the yarn winding surface is delivered to the gripping action of the weft gripping means by the weft delivery means, and the weft held by the weft gripping means or the weft is cut. The yarn is trimmed to an appropriate length by the means, thereby making it possible to reliably and quickly remove the unwrapped yarn on the yarn winding surface and improve the success rate of threading the yarn into the main nozzle for weft insertion. Moreover, even in the case where yarn feeding is not possible due to clogging of fluff in the nozzle, it is possible to remove fluff in the nozzle and thread threading, which is an excellent effect.

[Brief explanation of the drawing]

1 to 11 show an embodiment embodying the present invention, FIG. 1 is a side sectional view showing a normal yarn feeding and guiding state, FIG. 2 is a plan sectional view of the same state as FIG. 1, and FIG. Figure 3 is a side sectional view showing the state of removal of wrapped residual yarn in the case of a weft insertion error due to a weft clogging, Figure 4 is a side sectional view showing the joined state of the pair of weft yarn pulling rollers, and Figure 5 is Fig. 6 is a side sectional view showing the state where the mis-thread is pulled out; Fig. 6 is a side sectional view showing the pre-winding state;
Figure 8 is a side sectional view showing the weft cutting state, Figure 8 is a side sectional view showing the weft cut end passing through to the joining position of the pair of take-up rollers, and Figure 9 is the weft cheese and weft length measuring storage device. FIG. 10 is a side sectional view showing the weft trimming and alignment state when yarn breakage occurs between the yarns, and FIG.
1A to 1E are flowcharts showing the yarn feeding processing program. Weft length measurement storage device 8, yarn winding tube 8a, weft insertion blow nozzle 12 and weft transfer blow nozzle 20, which constitute weft transfer means, weft transfer blow nozzle 20 and suction pipe 38, which constitute weft gripping means, weft The main nozzle 13 for insertion, the driving roller 41 and the driven roller 43 that constitute the weft pulling back means, the weft guide insertion nozzle 16 as the weft insertion means, and the cutter 22 that constitutes the weft cutting means.Patent applicant: Toyota Industries Corporation. Agent
Person Patent Attorney Hironobu Onda (and 1 other person) No. 5 No. 6 No. 9

Claims (1)

[Scope of Claims] 1. A jet loom for measuring and storing the length of the weft drawn out from the weft cheese in a winding-type weft measuring and storing device, and for injecting and inserting the measured and stored weft from a main weft inserting nozzle. , a weft gripping means for yarn feeding processing disposed in front of the weft length measurement and storage device; a mechanical weft pulling back means disposed in front of the weft length measurement and storage device; a weft passing means for delivering the weft to the weft pulling back means; a weft cutting means for trimming the weft gripped by the weft gripping means or the weft delivered to the weft pulling back means; and a weft cut end trimmed by the weft cutting means. and a weft insertion means for inserting a weft into a main nozzle for weft insertion.