JPH03180544A - Feed yarn treating device in jet loom - Google Patents

Abstract

PURPOSE:To carry out sure threading by removing residual yarn on yarn winding face by action of blow nozzle for holding weft when yarn breakage occurs between weft cheese and main nozzle and then blowing weft through a weft guiding and inserting nozzle into a main nozzle. CONSTITUTION:A control computer stops a loom based on yarn feed miss detecting signal for detecting yarn breakage which occurred between weft cheese 3 and main nozzle 13 and then a blow nozzle 20 for holding weft is operated and simultaneously fixing pin 9a is separated from yarn winding face 8b and residual yarn Y1 on the yarn winding face 8b is introduced into a introducing block 15 by jet flow of blow nozzle 12 and delivered to holding action of blow nozzle 20 for the above-mentioned weft holding. Weft Y1 held by jet action of the nozzle 20 is cut with a cutter 22 and then weft Y is blown into the main nozzle for weft inserting to carry out threading.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a system for changing the weft thread tip when a yarn feeding error occurs 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 Laid-Open Nos. 60-2749 and 1-213437.

In the conventional device disclosed in Japanese Unexamined Patent Publication No. 60-2749, a guide nozzle is disposed between the winding type weft length 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.

In the conventional device disclosed in Japanese Unexamined Patent Publication No. 1-213437, a yarn feeding nozzle is disposed between a winding type weft length measuring storage device and a main weft insertion nozzle, and a yarn feeding nozzle is disposed between a weft sub-length storage device and a yarn feeding nozzle. A guide pipe is disposed between the guide pipes so as to be switchable between a guide position and a retreat position, so that the weft tip is ejected and inserted from the winding tube of the weft length measuring and storage device into the guide pipe at the guide position. It has become. 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 to be wound is inserted into the yarn feed nozzle as it is, the weft yarn ejected from the yarn feed nozzle may head toward the main nozzle for weft insertion in a tangled state. There is a high risk of failure.

In the conventional device disclosed in JP-A-1-213437, 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, the method of pulling the yarn back from the weft length measuring and storing device and threading it through the weft length measuring and storing device again increases the rate of weft processing failures. leading to complications.

SUMMARY OF THE INVENTION An object of the present invention is to provide a yarn feeding and processing device that can reduce the complexity of the mechanism and the lengthening of processing time.

[Means for Solving the Problems] For this purpose, the present invention includes an air flow gripping type weft gripping means disposed in front of a wrapping type weft length measuring and storage device, and a weft yarn gripping means from the weft length measuring storage device to the weft length measuring storage device. a weft passing means for delivering the weft to the means; a weft cutting means for trimming the weft held by the weft holding means; and a weft cutting main for guiding the weft and cutting the weft cut end trimmed by the weft cutting means A yarn feeding and processing device was constituted by a weft guide insertion nozzle for insertion into the nozzle.

[Operation] When the weft yarn is cut between the weft length measurement storage device and the main nozzle for weft insertion, the weft gripping means and the weft delivery means operate, and the remaining yarn wound on the yarn winding surface is transferred to the weft gripping means. handed over to the grasping action. 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 guide insertion nozzle.

[Example] Hereinafter, an example embodying the present invention will be described based on FIG. 1-t1.

A weft yarn unwinding motor 2 is operatively connected to the base end of the rotatably supported holding bracket l via a gear mechanism, and a weft yarn unwinding motor 2 is connected to the base end of the holding bracket l, which is rotatably supported.
is rotated in the weft unwinding direction by the operation of the weft unwinding motor 2.

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 supported. The blow nozzle 6 for unwinding the weft is connected to a pressure air supply tank (not shown) via a two-way electromagnetic valve V, and the blow nozzle 6 for unwinding the weft sprays air around the proximal side of the weft cheese 3. The direction is set so as to substantially intersect the axis of the weft cheese 3 toward the surface 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.
is installed, and the thread-wrapped tube 8a is driven by a motor M that is separate from the loom drive motor (not shown).

It is driven to rotate. As the thread-wrapping tube 8a rotates, the weft that is let out from the thread-winding tube 8a is moved to the thread-winding surface 8b by the protrusion and retraction of the locking pin 9a driven by the electromagnetic solenoid 9.
Controlled withdrawals from.

A weft introduction duct IO is attached to the weft introduction port 8C side that communicates with the thread winding tube 8a, and the weft introduction duct 10
A yarn breakage sensor 11 consisting of a transmission type photoelectric sensor is installed at an entrance provided on the side of the yarn breakage sensor 11 . Further, in the weft introduction duct 10, a weft insertion blow nozzle 12 is connected to the weft introduction port 8.
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. As a result, the air jets from the weft unwinding blow nozzle 6 are introduced into the converging guide tube 14, and the jet air flows introduced into the converging guide tube 14 are introduced into the weft introducing duct IO.

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 13 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 weft inserting main nozzle 13 13a in the most retracted position shown by the chain line in FIG.

An exclusion pipe 15c is integrally protruded from the lower peripheral surface of the introduction block 15, and a dust pipe 18 and a dust box 19 are installed directly below the exclusion pipe 15c. A weft gripping blow nozzle 20 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 weft gripping blow nozzle 20 using a two-way valve type. is controlled by a solenoid valve V3.

The entrance 15a of the introduction block 15 is formed into a convergent taper with a large diameter, and is curved so that the tip of the yarn winding tube 8a of the weft length measuring and storage device 8 is directed toward the entrance 15a of the introduction block 15. . The outlet 15b of the introduction block 15 is formed into a convergent taper with a small diameter, and the weft guide insertion nozzle 16 is inserted through a two-way valve type electromagnetic valve v4 through a gap between the outer periphery of the formed peripheral wall and the weft guide insertion nozzle 16. and is connected to the pressurized air supply tank. Also, the exclusion pipe 15
In c, the blow nozzle 21 is the weft gripping blow nozzle 20.
The outlet 15b intersects with the area facing the exclusion pipe 15c.
The pressure air supply from the pressure air supply tank to the blow nozzle 21 is controlled by a two-way valve type solenoid 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 an air cylinder 23 that moves in and out. The air cylinder 22 is connected to the pressurized air supply tank via a three-way electromagnetic valve (2).

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

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

An air guide 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 behind the air guide 27, and the outlet side of the suction pipe 29 is curved toward a dust box (not shown), and a blow nozzle 30 is installed in this curved portion so as to point toward the dust box. It is connected.

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 installed directly above the drive roller 32 operatively connected to the weft take-up motor 31.
is placed facing downward. A driven roller 34 is rotatably supported by the drive rod so as to face 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 both connected to the pressure air supply tank via two-way valve type solenoid valves V1°Va and Vs, and the air cylinder 33 is connected to the pressure air supply tank via a three-way valve type solenoid valve v1°. has been done. As shown in FIG. 1O, each electromagnetic valve v1 to Vlo1 motor 2, 4, 31. M
The electromagnetic solenoid 9 is under command control from a control computer C that is separate from the loom control computer. The control computer C responds to the detection signals from the yarn breakage sensors 11 and 24, the weft detector 28, and the winding diameter sensor 7 to activate the electromagnetic valves V,
~V,. In addition to controlling the opening and closing of motors 2, 4, and 3,
1. M and the electromagnetic solenoid 9 are controlled. - Figures 11(a) to (d) are flowcharts showing a yarn feeding processing program when yarn breakage occurs between the weft cheese 3 and the weft inserting main nozzle 13, and hereinafter the yarn feeding processing will be performed according to this flowchart. Explain the work.

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

When the weft yarn Y breaks 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 detects this yarn breakage, and a yarn feeding error detection signal is sent 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 instructs the opening of the electromagnetic valve V3, and then instructs the electromagnetic solenoid 9 to be energized. When the weft yarn Y is cut between the weft length measurement and storage device 8 and the weft inserting main nozzle 13 as shown by the chain line in FIG. 3 or FIG.
This yarn breakage is recognized based on the weft presence detection signal from the weft yarn presence detection signal, and a command is given to open the electromagnetic valve v2 for a predetermined time. As a result, the weft gripping blow nozzle 20 blows, the locking pin 9a' separates from the yarn winding surface 8b, and the weft insertion blow nozzle 12 blows for a predetermined period of time.

When the weft Y is cut between the weft guide insertion nozzle 16 and the weft inserting main nozzle 13 as shown by the chain line in FIG. As shown, the dust is introduced into the dust pipe 18 from the exclusion pipe 15c. Due to the separation of the locking pin 9a from the thread winding surface 8b, the winding thread Y1 on the thread winding surface 8b is
is released from the locking action of the locking pin 9a and is blown away toward the introduction block 15 by the jet stream from the weft insertion blow nozzle 12. The thread-wrapped tube 8a is connected to the introduction block 15
The jet stream from the weft insertion blow nozzle 12 is blown into the introduction block 15 from the yarn winding tube 8a almost at the same time. By this blowing action, the thread Y1 on the thread winding surface 8b is introduced into the introduction block 15 and delivered to the gripping action of the weft gripping blow nozzle 20.

As shown by the chain line in FIG.
Even when the yarn is cut between the weft guide insertion nozzle 16 and the weft guide insertion nozzle 16, the electromagnetic valve V3 is opened, the electromagnetic solenoid 9 is energized, and the electromagnetic valve v2 is opened for a predetermined period of time, so that the wound yarn Y1 on the yarn winding surface 8b becomes a dust pipe. 18 and is guided and grasped.

In both cases of cutting shown in Fig. 3 and Fig. 4, the bobbin wrapping surface 8
The winding yarn Y1 on b is connected to the dust pipe 18 as shown in FIG.
The winding yarn Y+ is removed to the dust box 19 via the winding tube 8a, and is drawn toward the dust pipe 18 and gripped by the jet action of the weft gripping blow nozzle 20 while connected to the yarn winding tube 8a.

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 is pre-wound on the thread winding surface 8b.

After weft preliminary winding, the control computer C activates the solenoid valve V6.
The cutter 22 performs opening/closing operations. As a result, the weft Y2 held by the jetting action of the weft holding blow nozzle 20 is cut between the removal pipe 15C and the dust pipe 18, and the weft length measuring storage device 8
The length of the weft yarn Y2 at the end is trimmed to the set length. This set length is suitable for smooth insertion into the main nozzle 13 for weft insertion.

After the cutting operation of the cutter 22, the control computer C commands the closing of the electromagnetic valve 3, and the weft gripping blow nozzle 2
0 injection stops. Next, the control computer C commands the excitation of the electromagnetic solenoid 9, and the locking pin 9a is separated from the bobbin winding surface 8b.

In this state, the control computer C controls the solenoid valve Vl++■
, and the blow nozzle 25.30 fires. 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.

Next, the control computer C controls the electromagnetic valve ■7°V 4
．． Command to open Vs, and main nozzle 1 for weft insertion.
3. The weft guide insertion nozzle 16 and the blow nozzle 21 spray. The blow nozzle 21 is a weft gripping blow nozzle 2
The blow nozzle 2 intersects with the area between the blow nozzle 2
The jet flow from 1 blows out the weft cutting end Y2 that has entered the removal pipe 15c from the outlet 15b, and passes it to the jetting action of the weft guide insertion nozzle 16. The weft cutting end Y2 is passed to the jetting action of the weft guide insertion nozzle 16.
is blown into the inlet 13a of the main weft insertion nozzle 13 by the jet action of the weft guide insertion nozzle 16. Since the weft cut end Y2 is cut to an appropriate length, insertion into the main nozzle 13 for weft insertion is performed smoothly.

The pre-wound yarn Y3 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 Y2 blown into the main nozzle 13 for weft insertion is ejected from the main nozzle 13 for weft insertion. The jet flow from the main weft insertion nozzle 13 joins the jet flow from the blow nozzle 25 and is guided to the weft introduction duct 26, and the weft cut end Y2 ejected from the weft insertion main nozzle 13 is inserted. Weft introduction duct 2
6 will be introduced. The weft cut end Y2 is a blow nozzle 25
The jet stream passes through the grip area between the driving roller 32 and the driven roller 34 and reaches the installation position of the weft yarn detector 28.

If threading to the main weft insertion nozzle 13 fails, the weft cut end Y2 does not reach the installation position of the weft detector 28, but the control computer C detects the weft detector 28.
If the weft presence detection information from 8 cannot be obtained within the set time and the number of threading failures does not reach the set number N, the electromagnetic valves V4, Vs, Vy, Vg,
Vs (7) Commands closing and demagnetization of the electromagnetic solenoid 9, main nozzle for weft insertion 13, weft guide insertion nozzle 1
6 and the blow nozzles 21, 25, 30 stop, and the locking pin 9a engages with the thread winding surface 8b. Next, the control computer C commands the opening of the electromagnetic valve v3 and also commands the motor M to operate by a predetermined amount.

Even though the threading failed, the weft has passed through the introduction block 15, and the weft is transferred to the dust pipe 1 by the injection of the weft gripping blow nozzle 20 when the electromagnetic valve V is opened.
It is gripped on the 8 side. As a result, a predetermined amount of weft yarn is pre-wound on the yarn winding surface 8b. After that, cutting by the cutter 22, separating the locking bottle 9a, and blowing the blow nozzle 25.30'
Main nozzle 13 for weft insertion, which prevents weft insertion by spraying
Threading is carried out in the same manner as described above by means of jets from the weft guide insertion nozzle 16 and the blow nozzle 21. When the number of threading failures reaches the set number N, 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, Vs, Vt, and Va are closed and the electromagnetic solenoid 9 is demagnetized, the main nozzle for weft insertion 13, the weft guide insertion nozzle 16, and the blow nozzle 21.25 stop spraying, and the locking pin 9a is closed. It engages with the thread winding surface 8b. Next, the control computer C commands the opening of the electromagnetic valve V+o, 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 Y2 is connected to both rollers 32 and 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 is pre-wound on the thread winding surface 8b.

After this preliminary winding, the control computer C instructs the weft take-off motor 31 to operate. As a result, the weft cut end Y
2 is taken up by both rollers 32 and 34, and this taking tension causes the weft Y3 to pass through the main weft insertion nozzle 13.
It is cut and separated from the main weft insertion nozzle 13 by the cutting action of the upper fixed blade 13b. This cut piece is on both rollers 3
2 and 34, and the blow nozzle 3
0, it 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 v1o to close. As a result, the driven roller 34 of the weft take-up motor 31 moves to the driving roller 32.
distance from.

Next, the control computer C commands the closing of the electromagnetic valve V, 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 yarn Y is cut between the weft yarn cheese 3 and the weft length measuring and storage device 8 as shown by the chain line in FIG. grasp.

Based on this weft cutting grasp, the control computer C stops and reverses the machine, opens the electromagnetic valve V, and controls the electromagnetic solenoid 9.
Excitation, solenoid valve V! After performing the opening for a predetermined time, a different processing program is performed. By opening the electromagnetic valve v3, energizing the electromagnetic solenoid 9, and opening the electromagnetic valve V2 for a predetermined period of time, the thread Y1 on the thread winding surface 8b is completely removed to the dust box 19 as shown in FIG.

After the electromagnetic valve v2 is opened 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 the blow nozzle 6 for weft unwinding blows the weft from the circumference of the weft cheese 3 as appropriate. placed at a distance apart. Next, the control computer C commands the opening of the electromagnetic valves V+ and Vs, and the blow nozzle 6 for unwinding the weft and the blow nozzle 12 for inserting the weft blow. Then, the control computer C instructs the operation of the weft unwinding motor 2. As a result, the weft cheese 3 rotates in the weft unwinding direction while being subjected to the jet action of the weft unwinding blow nozzle 6, and the weft tip Y4 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 for feeding. The jet stream from the weft unwinding blow nozzle 6 is directed toward the entrance of the weft introduction duct IO by the convergence action of the convergence guide tube 14, and the weft tip Y, which has been peeled off from the weft cheese 3, is as shown in FIG. It is introduced into the weft introduction duct IO. The weft tip Y, 4 introduced into the weft introduction duct 1O is blown out from the winding tube 8a by the jet flow of the weft insertion professional nozzle 12, and is transferred to the gripping action of the weft gripping/blow nozzle 20. .

If threading fails, such as when the weft tip Y4 does not pass through the weft length measuring and storage device 8, the weft tip Y4 does not reach the dust pipe 18, but the control computer C
If the weft presence detection information from the yarn breakage sensor 11 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+ and V2 are deactivated.
, Vs to close, and also instructs 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 the electromagnetic solenoid 9 to be demagnetized, the weft yarn unwinding motor 2 to stop operating, and the electromagnetic valves V+ and Vz to be closed. 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 and is discarded via the dust pipe 18. That is, the removal of the winding remaining yarn is carried out by the injection of the weft gripping blow nozzle 20, the separation of the locking pin 9a from the yarn winding surface 8b, and the weft insertion blow for delivering the weft to the gripping action of the weft gripping 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.

In addition, it is possible to pull back the wound remaining yarn from the weft length measuring storage device 8 to the weft cheese 3 side, or to use the main nozzle 1 for weft insertion.
3, the yarn feeding process failure due to re-threading to the weft length measuring and storage device 8 or the weft insertion main nozzle 13 is reduced, and the success rate of the yarn feeding process is improved.

In this embodiment, the winding yarn remaining yarn is introduced into the introduction block 15 by jetting from the weft yarn insertion blow nozzle 12, but the end of the winding tube 8a through which the winding yarn residual yarn is blown out and inserted is always connected to the entrance 15a of the introduction block 15. Therefore, no special stop position control of the thread-wrapped tube 8a is required. Furthermore, the introduction of the remaining wound yarn into the introduction block 15 can be ensured by appropriately enlarging the diameter of the inlet 15a, and there is no problem in increasing the diameter of the inlet 15a. Therefore, by blowing the blow nozzle 12 for inserting the weft yarn, the remaining yarn wound on the yarn winding surface 8b is inserted into the introduction block 15 reliably and quickly, and the processing time for removing the remaining yarn wound is very short.

The unwrapped yarn that is promptly 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.

Of course, the present invention is not limited to the above-mentioned embodiment. For example, as shown in FIG.
An embodiment is also possible in which the weft gripping blow nozzle 20, the blow nozzle 21, and the weft guide insertion nozzle 16 are connected to the electromagnetic valve V3 via the electromagnetic switching valve 36. If the electromagnetic switching valve 36 is switched to one side, the weft gripping blow nozzle 20 will inject,
When switched to the other side, the blow nozzle 21 and the weft guide insertion nozzle 16 spray. This makes it possible to reduce the number of electromagnetic valves and to simplify excitation/demagnetization control.

Further, as shown in FIG. 12, an embodiment in which a convergence guide tube 37 is disposed near the thread winding surface 8b of the weft length measuring and storage device 8 is also possible. The large-diameter opening side of the convergence guide tube 37 surrounds the entire thread winding surface 8b, and the small-diameter opening side is located at the entrance 15a of the introduction block 15.
is facing. The directional area at the tip of the thread-wrapping tube 8a is included in the large-diameter opening of the convergence guide tube 37, and the jet flow from the thread-wrapping tube 8a caused by the injection of the blow nozzle 12 for weft yarn insertion is directed to the rotational position of the thread-wrapping tube 8a. Convergent guide tube 37 regardless of
Everything will be introduced within. Therefore, the unwrapped yarn on the yarn winding surface 8b is reliably introduced into the introducing block 15. Incidentally, if a blow nozzle 17 for removing the winding remaining yarn is provided, the removal effect will be further enhanced.

Furthermore, in the present invention, a yarn breakage sensor is also disposed at the entrance 15a of the introduction block 15 in the first step, and it is possible to detect whether a weft breakage has occurred between the weft length measuring and storage device 8 and the weft guide insertion nozzle 16. The configuration is such that it can be determined whether the weft has occurred between the guide insertion nozzle 16 and the main nozzle 13 for weft insertion, and when the above-mentioned cross-crossing sensor sends a signal indicating that there is a weft, the weft is transferred between the weft guide and insertion nozzle 16 and the main nozzle 13 for weft insertion. It is also possible to carry out the weft processing operation by determining that the weft has been cut between the main nozzle 13 and injecting airflow only from the weft gripping blow nozzle 20.

[Effects of the Invention] As described in detail above, the present invention includes an air flow gripping type weft gripping means disposed in front of a wrapping type weft length measurement and storage device, and a weft gripping means from the weft length measurement storage device to the weft length measurement storage device. a weft passing means for delivering the weft to the means; a weft cutting means for trimming the weft held by the weft holding means; and a weft cutting main for guiding the weft and cutting the weft cut end trimmed by the weft cutting means Since the weft guide insertion nozzle for inserting the weft into the nozzle and the jammed yarn feeding device are configured, even in the event of any yarn breakage, the unwrapped yarn on the yarn winding surface can be grasped by the weft passing means. The weft yarn held by the weft gripping means is cut to an appropriate length by the weft cutting means, thereby reliably and promptly removing the remaining yarn on the yarn winding surface. This has an excellent effect of improving the success rate of threading into the main weft insertion nozzle.

[Brief explanation of drawings]

1-11 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 weft gripping state when yarn breakage occurs between the weft insertion main nozzle and the weft guide insertion nozzle, and Figure 4 is a side sectional view showing the weft gripping state between the weft length measuring and storage device and the weft guide insertion nozzle. Fig. 5 is a side sectional view showing the weft gripping state when yarn breakage occurs, Fig. 5 is a side sectional view showing the preliminary winding state, and Fig. 6 shows the state where the cut end of the weft thread has been passed through to the joining position of the pair of take-up rollers. 7 is a side sectional view showing the weft gripping state when yarn breakage occurs between the weft cheese and the weft length measuring and storage device, and FIG. 8 is a side sectional view showing the state in which the winding yarn remaining yarn is removed. A sectional view, FIG. 9 is a plan sectional view showing a state in which the weft tip is pulled out from the weft cheese,
) to (d) are block diagrams of the entire yarn feeding and processing device, No. 11.
The figure is a flowchart showing the yarn feeding processing program, No. 12.
The figure is a side sectional view showing another example. Weft length measurement storage device 8, yarn winding tube 8a and weft insertion blow nozzle 12 constituting weft delivery means, weft insertion main nozzle 13, introduction block 15 and weft gripping blow nozzle 20 constituting weft gripping means, weft yarn Guide insertion nozzle 16, cutter 22° constituting weft cutting means

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 of an air flow gripping type disposed in front of the weft length measuring and storage device, a weft transfer device for delivering the weft from the weft length measurement and storage device to the weft gripping means, and a weft held by the weft gripping means. In the jet loom, the jet loom is constructed of a weft cutting means for trimming straight weft threads, and a weft guide insertion nozzle for guiding the weft threads and inserting the cut ends of the weft threads trimmed by the weft cutting means into a main weft insertion nozzle. Yarn feeding processing device.