JPH02234954A - Yarn-feeding and treating apparatus of jet loom - Google Patents

Abstract

PURPOSE:To peel and remove a wound yarn from a yarn-winding surface and easily remedy the misfeeding of a yarn by ejecting an air jet against the yarn- winding surface from a blow nozzle for removing a wound yarn. CONSTITUTION:Air is ejected from a blow nozzle 10 for the removal of a wound yarn when a check pin 5a engageable with a yarn-winding surface 6a of a weft measuring and storage apparatus is separated from the yarn-winding surface. A wound yarn Y1 on the yarn-winding surface is subjected to the blowing action of the wound yarn removing bow nozzle in a state released from the checking action of the check pin, reeled from the yarn-winding surface and sucked and removed by a suction pipe 15 placed in front of the weft measuring and storage apparatus.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a weft length measurement method in the event of a yarn feeding error such as weft cutting between a wrapping type weft length measurement storage device and a weft insertion main nozzle. The present invention relates to a device that removes the wound yarn on the yarn winding surface of a storage device and performs yarn feeding error processing.

[Prior art] This type of yarn feeding and processing device is disclosed in Japanese Patent Application Laid-Open No. 62-57969. In this conventional device, a cutter is disposed so as to be switchable between a cutting position and a standby position on the side of a yarn winding surface of a winding type weft length measuring and storage device, and a suction vibrator is arranged in parallel. When the weft yarn is cut between the weft length measuring and storage device and the main nozzle for weft insertion, the cutter is moved from the standby position to the cutting position, and the cutter cuts the yarn on the yarn winding surface, causing it to flow into the suction pipe. is suctioned and eliminated.

[Problems to be Solved by the Invention] However, the configuration in which the cutter is switched between a position for cutting the thread on the thread winding surface and a standby position complicates the mechanism, and furthermore, it is difficult to obtain such a cutting action. The complexity of control is also unavoidable.

SUMMARY OF THE INVENTION An object of the present invention is to provide a yarn feeding and processing device that can easily remove yarn wound on the yarn winding surface of a weft length measurement and storage device while avoiding complication of mechanism and control. [Means for Solving the Problems] To achieve this, in the present invention, a blow nozzle for removing winding yarn that injects air toward the winding surface of the weft length measuring and storage device is disposed near the winding surface. A suction pipe is installed in front of the weft length measuring and storage device to suction and grip the weft that is blown out from the yarn winding surface toward the main nozzle for weft insertion by the jetting action of the yarn removal blow nozzle. [Function] The blowing nozzle for removing the winding yarn is ejected when the locking bin, which is in a relationship with and disengaging from the winding surface, is separated from the winding surface, and the winding yarn on the winding surface is locked by the locking pin. In the state where it is released from the action, it receives the spray action from the blow nozzle for removing the winding yarn.

As a result, the yarn is easily unwound from the yarn winding surface, and the weft yarn unwound from the yarn winding surface is suctioned away by the suction pipe.

[Example] Hereinafter, an example that embodies the present invention will be described based on the drawings.

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.
is rotated in the weft unwinding direction by the operation of the weft unwinding motor 2. A blow nozzle 4 is disposed near the circumferential surface of the proximal end of the weft cheese 3 so as to be oriented toward the circumferential surface of the weft cheese 3, and pressurized air is supplied to the blow nozzle 4 using a two-way valve type electromagnetic Controlled by Valp ■1. The weft unwinding motor 2 and the electromagnetic valve 1 are under command control from a control computer C that is separate from the loom control computer, and the air jetted from the blow nozzle 4 feeds the circumferential surface of the rotating weft cheese 3. Sweep in the direction. As a result, the weft tip on the weft cheese 3 is peeled off from the circumferential surface.

In front of the weft cheese 3, a weft length measurement and storage device 6 of a known winding type is installed, and its thread winding tube 6a is rotationally driven by a motor M that is separate from a machine drive motor (not shown). . The weft that is let out from the thread winding tube 6a as the thread winding tube 6a rotates is controlled to be pulled out from the thread winding surface 6C by the protrusion and retraction of the locking pin 5a driven by the electromagnetic solenoid 5.

A weft introduction duct 7 is attached to the side of the weft introduction port 6b that communicates with the yarn winding tube 6a, and a weft detector 8 consisting of a transmission type photoelectric sensor is installed at the introduction port 7a provided on the side of the weft introduction duct 7. is installed. The weft detector 8 detects the presence or absence of a weft cut before the weft length measurement and storage device 6. A weft insertion blow nozzle 9 is connected to the weft introduction duct 7 so as to face the weft introduction port 6b, and the supply of pressurized air to the weft insertion blow nozzle 9 is controlled by a two-way valve type electromagnetic valve v2. Ru. The air flow ejected from the weft insertion blow nozzle 9 passes through the yarn winding pipe 6a that communicates with the weft inlet 6b of the weft length measurement and storage device 6, and then the weft yarn is inserted into the weft (
(not shown) reaches the weft insertion main nozzle 11 side above.

A conical weft guide tube 12 is interposed between the weft cheese 3 and the weft length measuring and storage device 6, and its large diameter opening is directed toward the weft cheese 3, and its small diameter opening is directed toward the weft introduction duct. It is set opposite to the inlet 7a of No.7. As a result, almost all of the air flow from the blow nozzle 4 is introduced into the weft guide tube 12, and the air flow introduced into the weft guide tube 12 is introduced into the weft introduction duct 7. Therefore, the weft tip portion peeled off from the circumferential surface of the weft cheese 3 by the blow nozzle 4 is transferred to the blow nozzle 9 for weft insertion.
The air can be blown out from the thread-wrapped tube 6a along with the jet air flow.

A conical convergence guide tube 13 is disposed near the winding surface 6c of the weft length measuring and storage device 6, and the airflow ejected from the winding tube 6a by the blow nozzle 9 for weft insertion is directed to the winding surface 6c. All are introduced into the convergence guide tube 13 regardless of the rotational position of the tube 6a. A plurality of blow nozzles 10 for removing the winding yarn are arranged on the inner peripheral surface of the large diameter opening side of the convergence guide tube 13, and the pressurized air supply to the blow nozzles 10 for removing the winding yarn is carried out by a two-way valve type electromagnetic Controlled by valve ■3.

The jetting axis of each winding yarn removal blow nozzle 10 is the yarn winding surface 6.
The direction is set so that it is oriented on the bobbin winding surface 6C so as to substantially intersect with the central axis of the weft thread C, and is oriented slightly in the weft pulling direction from the bobbin winding surface 6C. As a result, the air jetted from the blow nozzle IO for removing the winding thread sweeps the thread winding surface 6C from the base end side to the distal end side.

A blow nozzle 14 and a suction pipe 15 are arranged opposite to each other across the area immediately before the small diameter opening of the convergence guide tube 13, and the supply of pressurized air to the blow nozzle 14 is controlled by a two-way valve type solenoid valve 4. The suction pipe 15 is the blower 17
It is connected to the. A fixed blade 1 is installed at the entrance of the suction pipe 15.
5a is attached, and a weft detector 16 consisting of a transmission type photoelectric sensor is installed in the suction pipe l5.

An arm 18 is swingably supported by a support shaft 19 near the suction pipe 15, and a fixed grip 18a is fixed to the distal end of the arm 18, and the base end thereof can be moved forward and backward. A motor 20 is operatively connected via a gear mechanism. A movable grip 18b is rotatably supported at the tip of the arm 18 and can be joined to the fixed grip 18a, and an electromagnetic solenoid 21 is operatively connected to the movable grip 18b. Both gripping bodies 18a. 18b is always in an open state, and when the electromagnetic solenoid 21 is energized, both gripping bodies 18a and 18b are joined. Both gripping bodies 18a. due to the swinging of the arm 18. 18b (hereinafter referred to as thread gripper)
The passage area is set to intersect with the area between the blow nozzle 14 and the suction vibrator 15, and to be close to the inlet of the main weft insertion nozzle 1l.

A weft detector 35 consisting of a transmission type photoelectric sensor is installed at the inlet of the main nozzle 11 for weft insertion, and the weft detector 35 detects weft cutting before the main nozzle 110 for weft insertion.

A fixed blade 11a is installed at the top of the tip of the main nozzle 11 for weft insertion.
A blow nozzle 22 is installed directly below the main nozzle for weft insertion 11, which is fixed so as to slightly protrude from the tip of the main nozzle for weft insertion.
2a is set to point toward the jetting path of the main nozzle 11 for weft insertion. A weft introduction duct 23 is installed directly above the main nozzle l1 for weft insertion, and its introduction port 23a is set at a position opposite to the injection port 22a of the blow nozzle 22 across the injection path of the main nozzle 11 for weft insertion. In addition, the outlet 23b is set at a position pointing toward the rear of the weft insertion main nozzle 11. Exit 2
An air guide 24 is installed behind the weft 3b, and a weft detector 25 consisting of a transmission type photoelectric sensor is attached to the tapered internal passage of the air guide 24. A suction vibrator 26 is installed behind the air guide 24.
The outlet side of the suction vibrator 26 is curved toward a dust box (not shown), and a blow nozzle 27 is connected to this curved portion so as to face the dust box.

The main weft insertion nozzle 11, the blow nozzle 22, the weft introduction duct 23, the air guide 24, and the suction pipe 26 are all mounted on the slay, and swing together as the slay swings. Each of these members 11, 22, 23,
A weft take-up motor 28 is installed behind the swing area of 24 and 26, and an air cylinder 32 is disposed facing downward directly above a drive roller 29 operatively connected to the weft take-up motor 28. A driven roller 33 is rotatably supported on the driving roller, facing the driving roller 29.
The air cylinder 32 is pushed into contact with the drive roller 29 by its protruding operation. It is possible.

Weft insertion main nozzle 11 and blow nozzle 22.27
The pressure is supplied to both by two-way solenoid valves v5 and V.
a, V7, and the supply of pressurized air to the air cylinder 32 is controlled by a three-way valve type solenoid valve v8. As shown in FIG. Weft detector 8, 16, 25.35
In response to the detection signal from the controller, it controls the opening and closing of the electromagnetic valves V, .

Figure 6 shows the weft length measuring and storage device 6 and the main nozzle for weft insertion 1.
1 is a flowchart showing a yarn feeding error processing program when a weft yarn breakage occurs between the weft thread and the weft thread.Hereinafter, the yarn feeding error processing work will be explained according to this flowchart.

Figures 1 and 2 show 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 yarn cheese 3 and the weft yarn length measuring and storage device 6, the weft yarn detector 35 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. As a result, the main weft inserting twuzzle 11 on the slay stops near the front position of the woven fabric.

After the loom is stopped, the loom control computer instructs the loom to be reversed by a predetermined amount, and the main weft insertion nozzle l1 is moved to the most retracted position (threading position) shown by the chain line in FIG.

Following the transmission of the machine stop signal, the control computer C commands the excitation of the electromagnetic solenoid 5, so that the locking pin 5a
Move away from C. Next, the control computer C commands the operation of the blower 17, and ii. the magnetic valves v2, V3.
, v4 is commanded to open.

As a result, an air flow toward the suction pipe 15 is generated between the blow nozzle 14 and the suction pipe 15, and air is ejected from the weft insertion blow nozzle 9, and further air is ejected from the winding yarn wandering blow nozzle 10. Inject. Air jetted from the weft insertion blow nozzle 9 is jetted from the yarn winding tube 6a toward the convergence guide tube l3, and jetted air from the winding yarn removal blow nozzle 10 flows over the yarn winding surface 6C toward the convergence guide tube 13.
Sweeping to the side.

The wound yarn Y. on the yarn winding surface 6C released from the locking action of the locking pin 5a. The thread is unwound from the winding surface 6C exclusively by the spray action from the blow nozzle 10 for removing the winding yarn and from the winding tube 6a.

The wound yarn Yo unwound from the yarn winding surface 6C is sucked into the blow nozzle 14 from the tip opening of the convergence guide tube 13 on the jet air from the yarn wandering blow nozzle 10 and the jet air from the yarn winding tube 6a. It is ejected between the pipe 15 and introduced into the suction pipe 15 on the airflow between the blow nozzle 14 and the suction pipe 15. Even when released from the locking action of the locking bin 5a, the winding thread Y
O is wound on the thread winding surface 6C by the winding force, and the winding thread Y. If the spray action from the thread-wrapping tube 6a does not directly blow onto the thread, the winding thread Y. It cannot be a sufficient unraveling factor for On the other hand, the blow nozzle 10 for removing the winding yarn
The jetting axis of is directed directly to the yarn yo on the yarn winding surface 6C, so that the yarn yo on the yarn winding surface 6C is directly exposed to the jet air from the yarn removal blow nozzle 10. As a result, the thread YO wound around the thread winding surface 6C by the winding force is also easily peeled off from the thread winding surface 6C.
As described above, the configuration of the winding yarn removal blow nozzle 10 that easily peels off the winding yarn yo from the yarn winding surface 6C is a simple mechanism with no moving parts, compared to a complicated mechanism that requires cutter placement switching and cutting operations. Moreover, relatively simple control of opening and closing the electromagnetic valve V3 is sufficient. Therefore, while suppressing the complexity of controlling the entire yarn feeding error process, the yarn can be wound reliably.
It is possible to eliminate o.

The thread Y. is removed from the thread winding surface 6C. The tip Y1 is introduced into the suction vibrator 15 by riding the air flow between the blow nozzle l4 and the suction pipe 15, and is subjected to the suction gripping action of the suction vibrator 15. When the weft tip Y1 is introduced into the suction pipe l5, the weft detector l6 detects the weft tip Y1, and subsequent yarn feeding error processing is continued. If the control computer C cannot obtain weft presence detection information from the weft detector l6 within a set time, it instructs the blower 17 to stop operating and the 1t magnetic valves ■2 to ■4 to close, and also instructs the alarm device 34 Send an alarm command to.

゜When the weft tip Y1 reaches inside the suction vibrator l5,
The control computer C commands the closing of the electromagnetic valves v2 and v3, and the injection from the blow nozzle 9.10 is stopped. At this point, the blower 17 is operating, and the weft tip Y1 is suctioned and gripped by the suction pipe 15. Under this state, the control computer C instructs the motor M to operate by a predetermined amount, and the thread-wrapped tube 6a rotates by a predetermined amount. As a result, the weft Y is pre-wound by a predetermined amount on the thread winding surface 6c. Next, the control computer C commands the motor 20 to rotate forward by a predetermined amount and the electromagnetic solenoid 2l to be energized. This causes the thread gripper 18a. 18b rotates and passes through the tension area of the weft tip Y1 in an open state, and closes after passing through the tension area of the weft tip Y1. Due to the closing operation of the yarn grippers 18a, 18b, the weft yarn tip Y1 is moved to the yarn gripper 18a. When the gripped weft tip Y1 moves to the inlet of the weft insertion main nozzle l1, it comes into contact with the fixed blade 15a on the suction pipe 15 and is cut and separated. As a result, the extending length of the weft yarn tip Y1 from the yarn grippers 18a, 18b is adjusted to a constant length, and the extending end from the yarn grippers 18a, 18b is the inlet of the weft insertion main nozzle l1. Placed nearby. After the normal rotation of the motor 20 is stopped by a predetermined amount, the control computer C instructs the electromagnetic valve v4 to close and the programmer 17 to stop operating. Next, the control computer C commands the opening of the magnetic valves v6 and v7, and the blow nozzle 22 and the main nozzle for weft insertion 11 are injected, and the air flow ejected from the main nozzle for weft insertion 11 is transferred from the blow nozzle 22. joins the jet air stream.

A suction air flow is generated at the inlet of the main nozzle 11 for weft insertion, and the weft ends Y! extend from the yarn grippers 18a and 18b. is introduced into the main nozzle 11 for weft insertion. After this, the control computer C commands the demagnetization of the electromagnetic solenoid 21 and the reversal operation of the motor 20 by a predetermined amount,
Thread gripper 18a. After 18b is released, it returns to the standby position. As a result, the weft tip Y1 introduced into the weft insertion main nozzle 11 is blown out from the weft insertion main nozzle 1l, but is forcibly inserted into the weft introduction port 23a of the weft introduction duct 23 by the blowing action of the blow nozzle 22. Ru. Then, the weft tip Y. is the outlet 23 of the weft introduction duct 23
The air is blown out from b toward the air guide 24, and is blown into the suction pipe 26 through the air guide 24.

When the weft tip Y1 reaches the position of the weft detector 25 in the suction pipe 26, the control computer C continues to perform subsequent yarn feeding error processing based on the weft yarn output information from the weft yarn detector 25. If threading to the main weft insertion nozzle 11 fails, the weft tip Y1 does not reach the position of the weft detector 25, but the control computer C sets the weft presence detection information from the weft detector 25. If it is not obtained within the time, the blower 17 is stopped, electromagnetic valves v5 and v6 are closed, and! Commands the excitation of the magnetic solenoid 5, and the main nozzle 1l for weft insertion and the blow nozzle 2.
2 stops, and the locking bottle 5a separates from the bobbin winding surface 6C. Then, when the number of threading failures does not reach the set number n, the control computer C performs the subsequent processing operations again from the prediction it= on the weft length measuring and storage device 6, and the number of threading failures reaches the set number n. If the threshold is reached, the alarm device 34 is commanded to issue an alarm.

If the threading is successful, the control computer C activates the electromagnetic valve V6 based on the weft presence detection information from the weft detector 25.
, V6 are closed and the electromagnetic solenoid 5 is demagnetized, the injection from the main weft insertion nozzle l1 and the blow nozzle 22 is stopped, and the locking pin 5a is separated from the bobbin winding surface 6c. Next, the electromagnetic valve 8 is commanded to open, and the air cylinder 32 is operated to protrude. As a result, the driven roller 33 is joined to the drive roller 29, and the weft tip Y1 is held between both rollers 29 and 33. Subsequently, the control computer C instructs the motor M to perform forward rotation by a predetermined amount, and the thread-wrapped tube 6a rotates by a predetermined amount. As a result, a predetermined amount of the weft Y is pre-wound in the weft length measuring and storage device 6. After this preliminary winding, the control computer C commands the opening of the tM1 valve v6 and also commands the operation of the weft yarn take-up motor 28. As a result, the weft tip Y1 is taken up by both rollers 29 and 33, and the weft tip Y1 is cut and separated by the fixed blade 11a on the main sozzle 11 due to the pulling tension. The cut pieces are picked up by both rollers 29 and 33 and discharged into a dust box by a blow nozzle 27.

When all of the cut pieces of the weft tip Y1 pass through the air guide 24, the weft detector 25 detects no weft, and in response to this, the control computer C commands the weft take-up motor 28 to stop, and the electromagnetic valve ■ 8 is ordered to close.

As a result, the operation of the weft take-up motor 28 is stopped, the air cylinder 32 is retracted, and the driven roller 33 is separated from the drive roller 29. Next, the control computer C commands the closing of the electromagnetic valve 6, and the air injection from the blow nozzle 27 is stopped. Thereafter, the machine rotates to the starting position and prepares for restarting the machine.

The present invention is, of course, not limited to the above-mentioned embodiments. For example, a blow nozzle for removing the winding yarn can be created by directing the tip of the yarn winding tube onto the yarn winding surface and using the blow nozzle 9 for inserting the weft thread and the yarn winding tube. It is also possible to create an embodiment in which these are combined.

[Effects of the Invention] As described in detail above, in the present invention, the winding yarn removal blow nozzle blows air onto the bobbin winding surface, so that the winding yarn on the bobbin winding surface is easily torn off. This has the excellent effect of achieving smooth yarn feeding error processing while avoiding componentization of the mechanism and complication of control.

[Brief explanation of the drawing]

The drawings show an embodiment embodying the present invention; FIG. 1 is a plan sectional view showing a normal yarn feeding and guiding state, FIG. 2 is a side sectional view of the same state as FIG. 1, and FIG. Figure 1 is an enlarged cross-sectional view taken along the line A-A in Figure 1, Figure 4 is a side cross-sectional view showing the state in which the winding thread is removed, and Figure 5 is a side cross-sectional view showing the state in which the weft tip has been passed through to the joining position of the pair of take-off rollers. Figure 6 is a block diagram, Figure 7 (a)
．． (b) and (c) are flowcharts showing a yarn feeding error processing program. Blow nozzle 10 for removing winding yarn, suction pipe 15, winding yarn Y
O,

Claims (1)

[Claims] 1. The length of the weft yarn pulled out from the weft cheese is measured and stored in a winding type weft length measuring and storage device, and the weft length is measured in the jet loom where the measured and stored weft is ejected from the main nozzle for weft insertion. A yarn removal blow nozzle that injects air toward the yarn winding surface of the storage device is arranged near the yarn winding surface, and the blowing action of the yarn removal blow nozzle sprays air from the yarn winding surface to the weft insertion main nozzle side. A yarn feeding and processing device in a jet loom in which a suction pipe for suctioning and gripping the weft yarn blown out to the weft yarn is disposed in front of the weft length measurement and storage device.