JPH05295639A - Method for treating weft yarn in jet loom - Google Patents

Abstract

PURPOSE:To surely take out and remove mispick caused by a mistake in pocking from a warp yarn shed by using the succeeding weft yarn as a lead. CONSTITUTION:The first electromagnetic solenoid 5 and the second electromagnetic solenoid 22 are installed near a yarn winding surface (1a) of a winding type apparatus 1 for measuring the weft yarn length. The first engaging pin (5a) driven by the first electromagnetic solenoid 5 is brought into contact and separated from the yarn winding surface (1a) to control the weft yarn taking out and unwinding from the yarn winding surface (1a) in weaving. The second engaging pin (22a) driven by the second electromagnetic solenoid 22 controls the taking out and unwinding of weft yarn (Y2) following the mispick (Y1) in causing the mispick. The succeeding weft yarn (Y2) is jetted from a main nozzle 8 for picking and blown into a weft yarn introduction duct 14 by jetting from a picking preventing nozzle 13. The succeeding weft yarn (Y2) blown into the weft yarn introduction duct 14 is held with rollers 19 and 20 and taken off. The mispick (Y1) is then taken out and removed from a warp yarn shed by the taking off the weft yarn (Y2).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to insert a weft yarn measured and stored by a weft length measuring and storing device into a weft yarn by a jet action of a main nozzle for weft insertion, and an jet action which intersects a jet axis of a main nozzle for weft insertion. The present invention relates to a weft processing method in a jet loom having a function of deflecting the weft out of the warp opening to prevent weft insertion.

[0002]

2. Description of the Related Art In the jet loom, a miss-weft insertion error is beaten and woven into a woven cloth immediately before the machine stand is stopped. An apparatus for removing this miss yarn is disclosed in Japanese Patent Laid-Open No. 63-28.
2342, JP-A-64-26760 and JP-A-64-77647. In each of these conventional devices, when the following weft yarn is blown out from the main weft insertion nozzle when the machine is stopped due to a weft insertion error, weft insertion prevention that intersects the injection axis of the main weft insertion nozzle It is deflected out of the warp opening by the jetting action of the nozzle. At this time, the miss yarn is not subjected to the cutting action of the cutter that cuts and separates the weft yarn from the weft inserting main nozzle every weft insertion, and the miss yarn and the succeeding weft yarn are connected. The trailing weft is blown into the suction pipe by the jetting action that intersects the jetting axis of the main weft inserting nozzle, and is taken up by the weft take-up device having a take-up roller that holds the weft. Along with this take-up action, the miss yarn woven before the weaving of the woven fabric is pulled out of the warp shed and removed.

[0003]

When the weft insertion is blocked, the weft is pulled out from the weft measuring and storing device by the main insertion nozzle for weft insertion or the fine injection for preventing thread slippage. Therefore, the succeeding weft that is ejected from the ejection opening of the main weft inserting nozzle is delivered to the ejection action of the weft inserting blocking nozzle by the jet of the main weft inserting nozzle, but if this delivery is not successful, the succeeding weft is entangled. There is a risk that If the succeeding wefts are entangled with each other, the succeeding wefts will not reach the gripping area of the weft take-up device, and the succeeding wefts cannot be picked up.
The miss yarn cannot be removed unless the succeeding weft yarn can be pulled off.

SUMMARY OF THE INVENTION It is an object of the present invention to surely perform an action of preventing the weft insertion by deflecting the weft out of the warp opening by a weft insertion inhibiting injection action intersecting with the injection axis of the weft insertion main nozzle.

[0005]

Therefore, according to the present invention,
When the weft insertion is blocked, the wefts drawn from the weft measuring and storing device are pulled out in at least two stages.

[0006]

Operation: Of the entire length of the weft drawn out from the weft measuring and storing device when weft insertion is blocked, only a part is drawn out first. Therefore, only a part of the entire length of the weft is transferred to the weft insertion preventing jetting action. The weft corresponding to this partial length is delivered to the weft-insertion-preventing jetting action, which deflects the weft out of the warp opening. This partial length is set within a range that does not cause entanglement. After the weft yarn is deflected out of the warp shed, all or a part of the remaining weft yarn is pulled out and delivered to the weft insertion preventing jet.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention is shown in FIG.
It demonstrates based on FIG. 2 and FIGS. 4-9.

Reference numeral 1 denotes a known winding type weft measuring and storing device. The weft yarn supplied from the weft yarn cheese 2 is the winding surface 1a.
The thread winding surface 1a is passed through the thread winding tube 1b that rotates around the
It is wound around and stored. The yarn winding tube 1a is rotationally driven by a winding motor 4 different from the machine base motor 3.

The cover 1c of the weft measuring and storing device 1 has a first
The electromagnetic solenoid 5 is attached. Winding surface 1
The weft yarn wound and stored on a is controlled to be pulled out from the yarn winding surface 1a by the appearance and withdrawal of the first locking pin 5a driven by the first electromagnetic solenoid 5. A reflection type photoelectric sensor type weft unwinding detector 6 is installed near the bobbin winding surface 1a. This unwinding detection signal is sent to the control computer C, and the control computer C based on the weft unwinding information from the weft unwinding detector 6 and the machine base rotation angle information from the rotary encoder 7 for detecting the machine base rotation angle. The excitation / demagnetization of the first electromagnetic solenoid 5 is controlled. By this excitation / demagnetization control, engagement between the thread winding surface 1a and the first locking pin 5a and separation of the locking pin 5a from the thread winding surface 1a are performed, and the thread winding surface 1a
The unwinding and the unwinding of the wound weft from the reel are performed.

A second electromagnetic solenoid 22 is provided on the cover 1c.
Is mounted so that its position can be adjusted. The second locking pin 22a driven by the second electromagnetic solenoid 22 comes into contact with and separates from the bobbin winding surface 1a. The second locking pin 22a is always separated from the bobbin winding surface 1a. As shown in FIG. 2, the second locking pin 22a is located on the bobbin winding surface 1a with respect to the first locking pin 5a.
Is offset by an angle θ in the circumferential direction. Further, as shown in FIG. 1, the second locking pin 22a is displaced to the front side of the bobbin winding surface 1a with respect to the first locking pin 5a.

The winding weft on the yarn winding surface 1a is wefted into the opening of the warp T by the jetting action of the main weft inserting nozzle 8. A weft insertion air supply pipe 9 and a breeze air supply pipe 10 are connected in parallel to the weft insertion main nozzle 8, and the supply and stop of the weft insertion air are controlled by an excitation / demagnetization control of an electromagnetic valve V ₁ . Done. The breeze air is always supplied to the weft-insertion main nozzle 8, and the attitude of the yarn tip of the weft Y is adjusted by this breeze air injection action.

A weft detector 11 is installed on the terminal side of the weft insertion. When the weft insertion is normally performed, the tip of the weft Y reaches the installation position of the weft detector 11. When the weft detector 11 does not detect the weft within a predetermined period of one weft insertion cycle, the control computer C determines that the weft insertion is abnormal, and controls the excitation / demagnetization of the electromagnetic valve V ₁ , the electromagnetic cutter 12 and the electromagnetic solenoid 5. While stopping, machine base motor 3
And the operation of the winding motor 4 is stopped.

A weft-insertion prevention nozzle 13 is installed just below the weft-insertion main nozzle 8 and a weft-introducing duct 14 is installed directly above it. A suction pipe 15 is installed behind the outlet of the weft introduction duct 14, the outlet side of the suction pipe 15 is curved toward a dust box (not shown), and a blow nozzle 16 is connected to this curved portion. ..

Main nozzle 8 for weft insertion, blow nozzle 1
3, the weft introduction duct 14, and the suction pipe 15 are all mounted on the sley, and integrally swing as the sley swings. A weft take-up motor 17 is installed behind the rocking region of each of the members 8, 13, 14, and 15, and an air cylinder 18 is installed above it. A drive roller 19 is operatively connected to the weft take-up motor 17, and a driven roller 20 is attached to a drive rod of the air cylinder 18. The driven roller 20 is pressed against the drive roller 19 by the protruding operation of the air cylinder 18.

A limit switch type weft yarn detector 21 is attached to the drive rod of the air cylinder 18.
The detection needle 21a of the weft yarn detector 21 sweeps through the region between the weft yarn introduction duct 14 and the suction pipe 15 as the air cylinder 18 projects.

The blow nozzles 13 and 16 are both connected to a pressure air supply tank (not shown) via two-way valve type electromagnetic valves V ₂ and V ₃ . Also, the air cylinder 18
Is connected to the pressurized air supply tank via a three-way valve type electromagnetic valve V ₄ .

An electromagnetic cutter 24 is arranged between the injection port of the main weft insertion nozzle 8 and the inlet of the weft introduction duct 14. Second electromagnetic solenoid 22, electromagnetic cutter 24, electromagnetic valves V _{2 to} V ₄ and weft take-up motor 1
The motor 7 receives commands from the control computer C together with the motors 3, 4, the first electromagnetic solenoid 5, the electromagnetic cutter 12, and the electromagnetic valve V ₁ . 7 to 9 are flow charts showing a weft processing program when a weft insertion error occurs, and the control computer C executes the weft processing according to this program.

When a weft insertion error is detected, the control computer C stops the excitation / demagnetization control of the electromagnetic valve V ₁ and the opening / closing control of the electromagnetic cutter 12, and at the same time, the electromagnetic valve V ₂ ,
Command the excitation of V ₃ . When the electromagnetic valve V ₂ is excited, the weft insertion preventing nozzle 13 ejects, and when the electromagnetic valve V ₃ is excited, the blow nozzle 16 ejects. Weft insertion prevention nozzle 1
By the injection of No. 3, a weft insertion preventing air flow intersecting the injection axis of the weft insertion main nozzle 8 is generated between the weft insertion prevention nozzle 13 and the weft introduction duct 14, and the blow nozzle 16 injects the suction pipe 15 into the suction pipe 15. A suction air flow is generated in the.

After the weft insertion error occurs, the second electromagnetic solenoid 22 is excited during the inertial operation until the machine stand is stopped, and the second locking pin 22a is engaged with the yarn winding surface 1a. After the second locking pin 22a is engaged with the bobbin winding surface 1a, the electromagnetic solenoid 5 is excited and the first locking pin 5a is separated from the bobbin winding surface 1a. The weft yarn Y ₂ (the weft yarn following the miss yarn Y ₁ ) which has been prevented from being pulled out and unwound by the first locking pin 5 a can be pulled out and unwound by exciting the electromagnetic solenoid 5, and the fine jetting of the weft-insertion main nozzle 13 is possible. By surface 1a
It is pulled out from and released.

The second locking pin 22a is engaged with the bobbin winding surface 1a, and the succeeding weft Y _{2 which} is pulled out and unwound from the bobbin winding surface 1a is pulled out by the second locking pin 22a as shown in FIG. Unleashing is blocked. That is, the second locking pin 22a
The amount of the subsequent weft that is unwound and unwound from the bobbin winding surface 1a until it is prevented from being pulled out by is approximately θ / 2π for one winding on the bobbin winding surface 1a. When the trailing weft Y ₂ is pulled out from the yarn winding surface 1 a, the trailing weft Y ₂ corresponding to the pulled-out length is obtained.
The starting end portion Y _{21 of this} is ejected from the weft-insertion main nozzle 13 by the fine injection of the weft-insertion main nozzle 13. The starting end portion Y ₂₁ of the succeeding weft yarn Y ₂ ejected from the weft-insertion main nozzle 13 is transferred to the jetting action of the weft-insertion prevention nozzle 13 and is blown into the weft-introduction duct 14 as shown in FIG.

Each stop command for the operation of the machine base motor 3, the excitation / demagnetization control of the electromagnetic solenoid 5 and the operation of the winding motor 4 is executed at substantially the same time as the excitation command of the electromagnetic valve V ₂ , and the machine base is cranked immediately before the beating. Stop at the corner position. The miss yarn Y ₁ is woven in front of the woven fabric W as shown in FIG.

After the machine base is stopped, the machine base motor 3 is rotated in the slow reverse direction by a predetermined amount, and the warp T is fully opened. In the state where the maximum opening is formed, the sley is at the crank angle position where it retracts to the last retracted position, and the region between the weft introduction duct 14 and the suction pipe 15 overlaps the gripping region of the rollers 19 and 20.

After the machine stand is stopped, that is, after a predetermined time t has elapsed after the first locking pin 5a is engaged with the bobbin winding surface 1a, the second electromagnetic solenoid 22 is demagnetized when the warp yarn is fully opened, and the second engagement is performed. The stop pin 22a is separated from the bobbin winding surface 1a. By separating the second locking pin 22a from the bobbin winding surface 1a, the succeeding weft Y ₂ on the bobbin winding surface 1a is released from the locking action of the second locking pin 22a, and the fine injection of the weft inserting main nozzle 8 is performed. Also, the weft insertion prevention nozzle 13 blows the weft insertion prevention jet into the weft introduction duct 14.

The weft unwinding detector 6 detects the pulling-out and unwinding of the succeeding weft Y _{2. When} the number of the detected unwinding and unwinding reaches a predetermined number n, the first electromagnetic solenoid 5 is demagnetized and the first
The locking pin 5a engages with the bobbin winding surface 1a. By this engagement, the pulling-out and unwinding of the succeeding weft Y ₂ is prevented, and the winding surface 1
The succeeding weft yarn Y ₂ of n turns (set to one pick length or shorter or longer length) on a is blown into the weft introduction duct 14. This succeeding weft yarn Y ₂ is the roller 1
It reaches the inside of the suction pipe 15 through the gripping areas 9 and 20.

After the succeeding weft yarn Y ₂ is discharged to a region outside the warp yarn opening on the side of the weft yarn introducing duct 14 and the suction pipe 15, the electromagnetic valve V ₄ is excited. Excitation of the electromagnetic valve V ₄ causes the air cylinder 18 to project, causing the driven roller 20 to come into pressure contact with the driving roller 19 as shown in FIG. By this pressure contact, the succeeding weft Y ₂ is clamped between the rollers 19 and 20.

The jet of the blow nozzle 16 acts on the succeeding weft yarn Y ₂ in the suction pipe 15, and the rollers 19 and 20.
Tension is applied to the succeeding weft Y ₂ between the suction pipe 15 and the suction pipe 15. The detection needle 21a of the weft detector 21 comes into contact with the tensioned subsequent weft Y ₂ and the weft detector 21 is turned on.
To do. When the weft detector 21 is turned on, the electromagnetic valve V ₂ is demagnetized, and the weft insertion blocking nozzle 13 stops jetting. Further, the winding motor 4 operates by a predetermined amount, and the yarn winding tube 1b rotates by a predetermined amount. By this predetermined amount of rotation, the weft yarn is pre-wound on the yarn winding surface 1a by a predetermined amount. After the preliminary winding, the electromagnetic cutter 24 is operated as shown in FIG. 6, and the succeeding weft Y ₂ is cut and separated between the injection port of the main weft insertion nozzle 8 and the inlet of the weft introduction duct 14.

When the weft detector 21 does not detect the presence of the yarn,
If the solenoid valve V₂, V₃, V _FourDegaussed, weft insertion
When the blocking nozzle 13 and the blow nozzle 16 stop spraying
The rollers 19 and 20 are separated from each other. And alarm device
25 works.

The reason why the weft detector 21 does not detect the presence of yarn
Then weft yarn Y₂Are entangled and reach the suction pipe 15.
It is when it does not reach. Winding of weft on the winding surface 1a
Storage state, (Adhesion between threads due to length of fluff, winding
Affects pulling and unwinding such as slipperiness on surface 1a
) Weft yarn type, fine jet in main nozzle 8 for weft insertion
Positional relationship between the pressure and the weft insertion blocking nozzle 13 and the weft
The weft insertion prevention nozzle 13 is mainly used for weft insertion.
From the fine jet of the nozzle 8, the weft insertion is blocked.
Subsequent weft yarn Y to stop jet₂Affect the delivery of. This
As a result of the effect of
The succeeding weft part is slightly jetted at the initial stage of weft insertion prevention.
It may catch up with the trailing weft portion. this
Such a catch-up state is, for example, one pick (the bobbin winding surface 1a
Trailing weft Y of 3 to 4 rolls above) ₂Continuous fine squirt
When trying to deliver it to the weft insertion blocking injection
Occurs. In such a state, the succeeding weft Y₂Entangled
And the succeeding weft Y₂Reaches the suction pipe 15
I can't come.

However, in this embodiment, the weft insertion prevention of the succeeding weft Y ₂ for one pick is divided into two stages, and first, only the starting end portion Y ₂₁ which is a part of the entire length of the succeeding weft Y ₂ is introduced into the weft introducing duct 14 or It is diverted to the area outside the warp opening, which is the suction pipe 15 side. The starting end portion Y ₂₁ is of a length such that the weft thread cannot be stretched during inertial operation, and the weft introduction duct 14 or the suction pipe 1 is provided.
The length is set so as to be blown into the inside 5 to a certain extent and is not entangled with each other, and the starting end portion Y ₂₁ is subjected to the jetting action of the weft insertion blocking nozzle 13 in the weft introduction duct 14. By this jetting action, the weft introduction duct 14
The subsequent weft portion leading to the locking pin 22a tension is applied, a state subsequent weft yarn Y ₂ is in which revved between the weft introducing duct 14 and the second locking pin 22a. Second locking pin 2
2a releases the succeeding weft Y ₂ under this tight condition. Therefore, the succeeding weft yarn Y ₂ after the starting end portion Y ₂₁ is delivered from the fine jet of the weft-insertion main nozzle 8 to the weft-insertion-preventing jet of the weft-insertion-preventing nozzle 13 without being entangled with each other, and the succeeding weft Y ₂ is fed to the rollers 19, 20. Surely reach the gripping area.

After operation of the electromagnetic cutter 24, weft take-up
The motor 17 operates. Cutting from the main nozzle 8 for weft insertion
Subsequent weft Y separated₂Is the weft take-up motor 17
It is drawn to the suction pipe 15 side by the operation. this
Miss thread Y due to take-up action₁Also pulled from inside the warp opening
It will be served. All miss yarn Y₁Of rollers 19 and 20
The weft yarn detector 21 is turned off after passing through the gripping region. Control
Computer C picks up the weft based on this yarn non-detection.
Stop of the motor 17, electromagnetic valve V_Four, V ₃Degaussing
Command. Separation of rollers 19 and 20 and blow nozzle
After the injection of 16 is stopped, the control computer C displays the machine base motor.
Clan that reverses 3 for a predetermined amount and starts weaving
Reverse to the corner position.

Of course, the present invention is not limited to the above-mentioned embodiment. For example, as shown in FIG. 3, a third electromagnetic solenoid 23 is installed and a third locking pin 23a driven by the electromagnetic solenoid 23 is provided. An embodiment in which it is always separated from the bobbin winding surface 1a is also possible. By engaging the third locking pin 23a with the bobbin winding surface 1a before the second locking pin 22a is separated from the bobbin winding surface 1a, the unwinding and unwinding of the weft from the weft measuring and storing device 1 can be 3 times. In this stage, the entanglement of the succeeding weft yarn Y ₂ which has been prevented from weft insertion can be prevented more reliably.

It is possible in the first embodiment to set the unwinding and unwinding of the weft yarn from the weft yarn length measuring and storing device 1 in three or more steps. In this case, the first locking pin 5 for the yarn winding surface 1a is used.
The contact and separation of “a” and the second locking pin 22a may be appropriately combined.

Further, it is possible to perform the stepwise pulling and unwinding for each winding only with the first locking pin 5a. Further, the present invention is
A yarn feeding processing device having a function of deflecting the weft yarns out of the warp opening by a jetting action intersecting the jetting axis of the weft inserting main nozzles to prevent weft insertion (the main nozzles for weft yarn insertion due to consumption of weft cheese or weft yarn breakage). It can also be applied to a device for threading the yarn.

As for the stepwise withdrawal timing of the succeeding weft yarn Y ₂ , the first time is carried out during the inertial motion of the machine frame as in the above-mentioned embodiment, the machine frame is stopped, and the second time is taken at the maximum opening after the reverse rotation. However, it is possible to combine them at various times as follows.

During the inertial operation, the second and subsequent withdrawals should also be performed. Perform the first withdrawal during inertial operation, the second withdrawal during reverse operation after machine reverse, and the third withdrawal at or after maximum opening after reverse.

[0036]

As described above in detail, according to the present invention, when weft insertion is prevented, the weft drawn from the weft measuring and storing device is pulled out in at least two stages. The weft yarn is deflected to the outside of the warp opening without being entangled with each other, and the excellent effect that the miss yarn processing or the yarn feeding processing can be favorably performed is achieved.

[Brief description of drawings]

FIG. 1 is a combination diagram of a weft processing device and its control circuit.

FIG. 2 is a front view of a weft measuring and storing device.

FIG. 3 is a front view of another example weft measuring and storing device.

FIG. 4 is a combination diagram showing a state in which a starting end portion of a succeeding weft is blown into a weft introduction duct.

FIG. 5 is a combination diagram showing a state in which the remainder of the succeeding weft is blown into the weft introduction duct.

FIG. 6 is a combination diagram showing a state in which a succeeding weft yarn is cut and separated from a main nozzle for weft insertion.

FIG. 7 is a flowchart showing a weft processing program.

FIG. 8 is a flowchart showing a weft processing program.

FIG. 9 is a flowchart showing a weft processing program.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Weft measuring and storing device, 5a ... 1st locking pin, 8 ... Main nozzle for weft insertion, 13 ... Weft insertion blocking nozzle, 14 ... Weft introduction duct, 22a ... 2nd locking pin, C ... Control computer.

Claims (1)

[Claims] 1. A weft yarn measured and stored by a weft length measuring and storing device is weft-inserted by a jetting action of a weft-inserting main nozzle, and intersects with a jetting axis of the weft-inserting main nozzle after a machine stand stop signal is generated. In a jet loom having a function of deflecting the weft yarn out of the warp opening by a jetting action to prevent weft insertion, when the weft insertion is prevented, the weft yarn pulled out from the weft measuring and storing device is pulled out in at least two stages. Weft processing method in jet loom.