JP2669061B2 - Yarn feed processing equipment in jet looms - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to a weft length measuring method in the case of a yarn feeding error caused by a weft cut between a winding type weft length measuring and storing device and a weft insertion main nozzle. The present invention relates to a device for inserting a leading end of a weft drawn from a storage device into a main nozzle for weft insertion.

[Prior Art] A yarn feeding apparatus of this kind is disclosed in Japanese Patent Application Laid-Open Nos. 60-2749, 64-40638 and 1-92452. In the conventional device of Japanese Patent Laid-Open No. 60-2749, a guide nozzle is arranged between the winding type weft measuring and storing device and the main nozzle for weft insertion, and the yarn winding surface of the weft measuring and storing device is provided. A guide suction tube is provided on the side, and the remaining yarn wound on the yarn winding surface is sucked into the guide suction tube and inserted into the guide nozzle.

In the conventional apparatus disclosed in Japanese Patent Application Laid-Open No. 64-40638, the remaining yarn wound on the yarn winding surface is mechanically gripped, and the gripped body is moved to near the entrance of the main nozzle for weft insertion, and the gripped yarn is used for weft insertion. It is designed to be inserted into the main nozzle.

In the conventional device of Japanese Patent Application Laid-Open No. 1-92452, a yarn feed nozzle is disposed between a weft length measuring and storing device and a weft insertion main nozzle, and between the yarn feed nozzle and the weft measuring and storing device. The first guide pipe is disposed so as to be switchable between a guide position and a retreat position, and a second guide pipe is provided between the yarn feed nozzle and the weft insertion main nozzle to guide and retract the position. It is arranged so as to be switchable.

[Problems to be Solved by the Invention] However, in the conventional apparatus disclosed in Japanese Patent Application Laid-Open No. Sho 60-2749, the guide suction pipe is moved to the vicinity of the yarn winding surface in order to pull out the remaining yarn on the yarn winding surface of the weft length measuring and storing device. However, it is difficult to pull out and remove the remaining yarn wound on the yarn winding surface only by the suction operation of the guide suction tube.

In the conventional apparatus disclosed in Japanese Patent Application Laid-Open No. 64-40638, a mechanism for mechanically grasping the remaining yarn wound on the yarn winding surface and inserting it into the main nozzle for weft insertion is very complicated. As a result, a prolonged processing operation cannot be avoided.

In the conventional apparatus of Japanese Patent Application Laid-Open No. 1-92452, the normal weft path position during the operation of the loom and the yarn supply path position during the yarn supply processing are substantially the same, and a pair of guide pipes are formed to form the yarn supply path. It must be switched on the weft path. In order to ensure the yarn feeding guide from the yarn winding pipe to the entrance of the main nozzle for weft insertion, the length of the first guide pipe is about the length of the weft path between the yarn winding pipe and the yarn feed nozzle, and the length of the second guide pipe is The length must be approximately equal to the length of the weft path between the yarn feed nozzle and the main nozzle for weft insertion. The formation of the yarn path is not appropriate.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a yarn feeding apparatus which can avoid a complicated mechanism and a long processing time.

[Means for Solving the Problem] Therefore, in the first invention, the weft yarn drawn from the yarn winding tube of the weft length measuring and storing device is fed onto a route apart from the normal weft route for introducing the weft insertion main nozzle. Along with the arrangement of the yarn tube, a slit is provided in the supply tube to allow insertion and removal of the weft between the weft length measuring and storing device and the main nozzle for weft insertion, and the slit is provided between the weft measuring and storing device and the main nozzle for weft insertion. Is provided with an annular guide for guiding the weft, and the annular guide is attached to the switching drive means so as to be switchably arranged between the weft path and the yarn feeding path in the yarn feeding tube. An induced airflow generating means for introducing the weft drawn from the pipe into the yarn feeding pipe was provided.

Further, in the second invention, the weft supply pipe is arranged on a path apart from a normal weft path for introducing the weft drawn from the thread winding pipe of the weft length measuring and storing apparatus to the weft insertion main nozzle, and A slit is provided in the yarn feeding tube between the length measuring storage device and the main nozzle for inserting the weft so that the weft can be taken in and out, and a winding yarn is provided near the yarn winding surface to remove the remaining yarn wound on the yarn winding surface. In addition to disposing a blow nozzle for exclusion, at the inlet side of the yarn feeding tube, an induction air flow generating means for introducing the weft drawn from the bobbin winding tube into the yarn feeding tube is installed, and at the outlet side of the yarn feeding tube. Is provided with a direction change body for guiding the air flow introduced into the yarn feeding pipe to the inlet of the main nozzle for weft insertion, and switches the direction change body so as to be switchable between a direction change operation position and a retreat position. Attached to.

[Operation] When a yarn breakage occurs between the weft measuring and storage device and the main weft insertion nozzle, the weft yarn fed out from the yarn winding is introduced into the yarn feeding tube by the induced air flow generated by the induced air flow generation means. To be done. The tip of the weft introduced into the yarn feeding tube is guided and blown into the inlet of the main nozzle for weft insertion by the air flow in the yarn feeding tube.

In the first invention having the annular guide, the annular guides are switchably arranged on the yarn feeding path before the excluded wefts are introduced into the yarn feeding tube, and the wefts introduced into the yarn feeding tube pass through the annular guide. Then, the annular guide through which the weft is passed is switchably arranged on the normal weft path, and the weft in the yarn feeding tube moves to the weft path via the slit on the yarn feeding tube.

According to the second aspect of the invention having the winding yarn removing blow nozzle, the remaining winding yarn on the yarn winding surface is easily removed from the yarn winding surface by the jet flow from the winding yarn removing blow nozzle. In addition, due to the presence of the directional change body, the air flow in the yarn supply pipe is changed at the outlet of the yarn supply pipe to the inlet side of the weft insertion main nozzle by the directional change body, and the weft leading end follows the change direction. Inserts into the main nozzle.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

A weft unwinding motor 2 is operatively connected to the base end of the rotatably supported holding bracket 1 via a gear mechanism, and a weft cheese 3 mounted on the tip of the holding bracket 1 is used for weft unwinding. The motor 2 rotates in the weft unwinding direction by the operation of the motor 2.

In the vicinity of the base end side circumferential surface of the weft cheese 3 and the weft solution舒用blow nozzle 4 is disposed, weft pressure air in the pressure air supply tank (not shown) through the electromagnetic valve V ₁ of the two-way valve-type It is supplied to the unwinding blow nozzle 4. The injection axis of the weft unwinding blow nozzle 4 substantially intersects with the axis of the weft cheese 3 toward the base end side peripheral surface of the weft cheese 3 and the weft cheese 3
The direction is set so as to form a shallow angle with respect to the peripheral surface. Thereby, the jet air from the weft unwinding blow nozzle 4 sweeps the peripheral surface of the weft cheese 3 from the base end to the tip end.

A weft measuring and storing device 5 of a known winding type is installed in front of the weft cheese 3, and the yarn winding tube 5 a is rotationally driven by a motor M different from a machine driving motor (not shown). . Withdrawal of the weft fed from the yarn winding tube 5a with the rotation of the yarn winding tube 5a is controlled by pulling out of the locking pin 6a driven by the electromagnetic solenoid 6 supported by the cover 12 from the yarn winding tube 5b. A weft introduction duct 7 is attached to the weft insertion inlet 5c side communicating with the bobbin winding tube 5a,
A yarn breakage sensor 8 composed of a transmissive photoelectric sensor is installed at an introduction port 7a provided on a side portion of the weft introduction duct 7. Further, a weft insertion blow nozzle 9 is connected to the weft introduction duct 7 so as to direct the weft introduction port 5c, and the pressure air in the pressure air supply tank is passed through a two-way valve type electromagnetic valve V _2. It is supplied to the weft insertion blow nozzle 9.
The jet airflow from the weft insertion blow nozzle 9 reaches the weft insertion main nozzle 10 on the slay (not shown) via the yarn winding tube 5a communicating with the inlet 5c of the weft length measuring and storing device 5. .

A conical weft guide tube 11 is interposed between the weft cheese 3 and the weft length storage device 5, and has a large-diameter opening directed toward the weft cheese 3 and a small-diameter opening defined as a weft introduction duct. It is set to face the inlet 7a of No. 7. As a result, almost all the jet air flow from the weft unwinding blow nozzle 4 is introduced into the weft guide pipe 11, and the jet air flow introduced into the weft guide pipe 11 is introduced into the weft introduction duct 7.

A pair of yarn removal blow nozzles are provided on the upper side of the cover 12.
13 is attached so as to face the thread winding surface 5b, and an inlet of a branch pipe 14 is provided below the cover 12 so as to open into the cover 12. The yarn discharge blow nozzle 13 is connected to the pressure air supply tank via a two-way valve type electromagnetic valve V ₃ . A suction pipe 15 is arranged in the extension direction of the outlet of the branch pipe 14, and a weft detector 16 composed of a photoelectric sensor is installed in the suction pipe 15.
The suction pipe 15 is connected to the blower 17,
A cutter 18 is interposed between 15 and the branch pipe 14.
The cutter 18 is operatively connected to an air cylinder 41, and the air cylinder 41 is connected to a pressurized air supply tank via a three-way valve type electromagnetic valve V ₄ .

A branch port 14a extends through the side of the branch pipe 14, and a blow-in nozzle 19 is attached to the opposite side of the branch port 14a so as to point toward the branch port 14a. The blow-in nozzle 19 is connected to the pressure air supply tank via a two-way valve type electromagnetic valve V _5, and the jet flow from the blow-in nozzle 19 crosses the inside of the branch pipe 14 and is blown into the branch port 14a.

At the branch port 14a of the branch pipe 14, a linear first yarn feeding inner pipe 20A
Is connected, and a curved second yarn feeding inner pipe 20B is disposed immediately in front of the first yarn feeding inner pipe 20A. The outlet of the first yarn feeding inner pipe 20A and the inlet of the second yarn feeding inner pipe 20B are opposed to each other, and the outlet direction of the second yarn feeding inner pipe 20B is the introduction port 10a of the weft inserting main nozzle 10. Is set in the vicinity of the direction orthogonal to the introduction direction. Slits 20a, 20b are formed in the upper portions of the peripheral surfaces of both yarn feeding inner tubes 20A, 20B from the inlet to the outlet.

The first yarn feeding outer pipe 21A is rotatably fitted on the outer periphery of the first yarn feeding inner pipe 20A, and the second yarn feeding is also performed on the outer periphery of the straight portion of the second yarn feeding inner pipe 20B. The yarn outer tube 21B is rotatably fitted, and both yarn feeding outer tubes 21A and 21B are connected by a connector 22. Both the yarn feeding outer tubes 21A and 21B can be integrally rotated around the both yarn feeding inner tubes 20A and 20B by the connector 22. Slits 21a, 21b are formed from the inlet to the outlet in both yarn supply outer tubes 21A, 21B, and both slits 21a, 21b are formed in the yarn supply inner tubes 20A, 20B when viewed in the radial direction of the yarn supply inner tubes 20A, 20B. It can match the upper slits 20a and 20b. An air cylinder 23 is provided near the first outer yarn feeding tube 21A.
A drive rack 23a is attached to the drive rack 23a, and a fan-shaped pinion that engages with the drive rack 23a is attached to the first outer yarn feeding tube 21A.
24 are anchored. Therefore, when the drive rack 23a appears and retracts, the first and second yarn feeding outer pipes 21A, 21B integrally rotate about the yarn feeding inner pipes 20A, 20B. Air cylinder 2
3 is connected to the pressure air supply tank through the solenoid valve V ₆ of the three-way valve type.

An air cylinder 25 is installed between the weft length measuring and storing device 5 and the weft insertion main nozzle 10, and an annular yarn guide 26 is fixed to the tip of the drive rod. Due to the operation of the air cylinder 25, the yarn guide 26 moves between the normal weft path shown in FIG. 2 and the first and second inner yarn supplying pipes 20A and 20B and the outer yarn supplying pipes 21A and 21B as shown in FIG. And the yarn feeding path in the section. The air cylinder 25 is connected to the pressure air supply tank through an electromagnetic valve V ₇ of the three-way valve type.

An air cylinder 27 is provided above the outlet of the second yarn feeding inner tube 20B.
Are disposed downward, and a direction change body 28 is attached to the tip of the drive rod. The direction change body 28 is moved from the retracted position shown in FIG.
It can be switched to the direction changing position shown in the figure, and a direction changing surface 28a is provided in the direction changing body 28. A direction changing nozzle 29 is provided on the direction changing surface 28a so that the direction of the nozzle 29 is orthogonal to the outlet direction of the second yarn feeding inner tube 20B. The air cylinder 27 is connected to the pressurized air supply tank via a three-way valve type electromagnetic valve V ₈ , and the direction changing nozzle 29 is a two-way valve type electromagnetic valve V 8.
It is connected via ₁₃ to the pressure air supply tank.

At the inlet 10a of the weft insertion main nozzle 10, a photoelectric sensor type yarn break sensor 40 is installed, and at the upper end of the weft insertion main nozzle 10, a fixed blade 10b is provided from the tip of the weft insertion main nozzle 10. It is attached so that it protrudes slightly.
A blow nozzle 30 is installed directly below the weft-insertion main nozzle 10, and the injection direction of the blow nozzle 30 is the weft-insertion main nozzle 10.
Is set so as to direct the injection path. A weft introduction duct 31 is installed directly above the weft insertion main nozzle 10, and its introduction port 31a is set at a position facing the injection port of the blow nozzle 30 with the injection route of the weft insertion main nozzle 10 in between. At the same time, the outlet 31b is set at a position facing the rear of the weft insertion main nozzle 10. Exit 31
An air guide 32 is provided behind b, and a weft detector 33 composed of a transmissive photoelectric sensor is attached to a tapered internal passage of the air guide 32. A suction pipe 34 is provided behind the air guide 32, and the suction pipe 34
Is curved toward a dust box (not shown), and a blow nozzle 35 is connected to the curved portion so as to face the duct box.

The weft insertion main nozzle 10, the blow nozzle 30, the weft introduction duct 31, the air guide 32, and the suction pipe 34 are all mounted on the sley, and integrally swing as the sley swings. A weft take-up motor 36 is installed behind the swing region of each of these members 10, 30, 31, 32, 34, and an air cylinder 38 is provided directly above a drive roller 37 operatively connected to the weft take-up motor 36. It is arranged downward. A driven roller 39 is rotatably supported by the drive rod so as to face the drive roller 37, and can be pressed against the drive roller 37 by the protruding operation of the air cylinder 38.

Weft insertion for the main nozzle 10 and blow nozzle 30, 35 is connected to the pressure air supply tank through an electromagnetic valve V _9, V _10, V ₁₁ of both two-way valve type, the air cylinder 38 is a three-way valve Type solenoid valve V ₁₂ is connected to the pressurized air supply tank. As shown in FIG. 7, each solenoid valve V ₁
.About.V ₁₃ , the motors 2, M, the blower 17, and the electromagnetic solenoid 6 are commanded and controlled by a control computer C which is different from the loom control computer. The control computer C has a thread break sensor 8,
In response to the detection signals from 40 and the weft detectors 16, 33, the electromagnetic valves V _{1 to} V ₁₃ are opened and closed, and the motors 2, M,
The blower 17 and the electromagnetic solenoid 6 are controlled.

FIG. 8 is a flowchart showing a yarn supply processing program. Hereinafter, the yarn supply processing operation will be described with reference to this flowchart.

FIGS. 1 and 2 show the weft path of the weft Y when the weaving machine is in operation, and the thread guide 26 through which the weft Y passes is arranged on this weft path. Further, as shown in FIGS. 2 and 3, the slits 21a and 21b of the outer yarn feeding pipes 21A and 21B and the slits 20a and 20 of the inner yarn feeding pipes 20A and 20B are aligned with each other, and The weft thread between the weft insertion main nozzle 10 and the weft insertion main nozzle 10 can move in and out of the yarn feeding inner tubes 20A, 20B through the slits 21a, 21b, 20a, 20b.

When the weft Y is cut between the weft cheese 3 and the weft insertion main nozzle 10, the yarn break sensor 8 or 40 detects the yarn break, and a yarn feeding error detection signal is sent to the control computer C. The control computer C sends a machine stop signal to the loom control computer in response to the yarn feeding error detection signal,
The loom control computer issues a machine stop command in response to this signal. As a result, the weft insertion main nozzle 10 on the slay stops near the cloth fell position of the woven fabric. After the machine stop,
The loom control computer commands a predetermined amount of machine reverse,
The weft insertion main nozzle 10 is moved and arranged at the last retreat position (threading position) of the swing area.

The control computer C with an instruction to open the electromagnetic valves V _6, V _7, V ₈ Following machine frame stop signaling, commands the actuation of the blower 17. When the solenoid valve V ₆ is opened, the yarn feeding outer tube 21A,
21B rotates around the yarn feeding inner tubes 20A, 20B, and the slits 21a, 21b are disengaged from the slits 20a, 20b as shown in FIGS.
By opening the electromagnetic valve V _7, the yarn guide 26 is switched from the weft yarn path to the yarn feeding path in the yarn feeding inner tubes 20A and 20B.
In addition, the direction changer 28 is opened by the opening of the electromagnetic valve V ₈
The blower 17 is switched to a direction changing position where it is joined to the outlet of 20B, and the suction airflow is generated at the inlet of the branch pipe 14 by operation of the blower 17.

If a yarn break occurs between the weft length measuring and storing device 5 and the weft insertion main nozzle 10, the yarn break sensor 8 detects the presence of the weft, and the control computer C excites the electromagnetic solenoid 6 based on this detection information. The locking pin 6a
Separate from 5b. Next, a command to open the electromagnetic valves V ₃ and V ₅ is issued, and the winding yarn removing blow nozzle 13 and the blowing nozzle 19 are opened.
Fires. By the jet flow from the yarn removing blow nozzle 13, the yarn tip Y ₁ of the remaining yarn on the yarn winding surface 5 b is eliminated toward the branch pipe 14, and the jet flow from the yarn removing blow nozzle 13 is removed. And the suction / intake flow near the inlet of the branch pipe 14, the suction is introduced into the suction pipe 15.

The control computer C with instructs the closing of the deactivation and the electromagnetic valve V ₃ of the blower 17 when not obtained weft chromatic detection information from the weft detector 16 within the set time, the alarm command to the alarm device 42 Blow nozzle 13 for winding yarn removal
The air flow composed of the jet flow from the nozzle and the suction air flow on the side of the suction pipe 15 removes the remaining yarn on the yarn winding surface 5b and sucks the pipe.
Increase the certainty of guidance into 15 Therefore, the removal of the unwrapped residual yarn and the retention of the yarn tip portion Y ₁ which are prerequisites for successful threading through the weft inserting main nozzle 10 are to open the electromagnetic valve V ₃ , excite the electromagnetic solenoid 6 and operate the blower 17. Is achieved by relatively simple control.

If the thread tip Y ₁ of the winding residual thread reaches into the suction pipe 15, the control computer C, based on the detection information from the weft detector 16 instructs the closing of the solenoid valve V _3, blow nozzle
The injection from 13 stops. At this time, the blower 17 is operating, and the yarn tip portion Y ₁ is sucked and gripped by the suction pipe 15. Under this condition, the control computer C commands the demagnetization of the electromagnetic solenoid 6 and the operation of the motor M by a predetermined amount. As a result, the locking pin 6a is engaged with the bobbin winding surface 5b.
And the winding surface 5a is rotated by a predetermined amount, and the weft Y is pre-wound by a predetermined amount on the winding surface 5b.

After pre-winding, the control computer C commands the opening and closing of the electromagnetic valve V _4, the cutter 18 performs a cutting operation. By this cutting action, the length of the preliminary winding yarn is trimmed to a predetermined length. Next, the control computer C stops the operation of the blower 17 and commands the excitation of the electromagnetic solenoid 6 so that the locking pin 6a is separated from the bobbin winding surface 5b. This allows the bobbin winding surface
The preliminary winding yarn on 5b can be pulled out from the winding surface 5b.

The control computer C uses electromagnetic valves V ₃ , V ₅ , V ₁₃ , V ₁₀ and V ₁₁
To release the wound yarn, the blow nozzle 13 for removing the wound yarn, the blowing nozzle 19, the direction changing nozzle 29, and the blow nozzles 30, 35.
Fires. The preliminary winding yarn on the yarn winding surface 5b is eliminated toward the branch pipe 14 side by the injection of the winding yarn removing blow nozzle 13,
The yarn tip portion Y ₁ is introduced into the yarn feeding inner pipe 20A through the branch port 14a of the branch pipe 14 by the injection of the blowing nozzle 19. The jet flow from the blowing nozzle 19 is blown through the yarn feeding inner pipes 20A, 20B whose peripheral surfaces are closed by the yarn feeding outer pipes 21A, 21B, and the yarn tip portion Y ₁ is in the yarn feeding inner pipes 20A, 20B. The air flow conveys the weft insertion main nozzle 10 to the inlet 10a side. Slit 20a
The air flow through blow the yarn feeding the pipe 20B which is closed in the horizontal linear portion of the occluded yarn feeding the tube 20A and the slit 20b all less leakage to the outside, the transport action of the yarn tip Y ₁ is a highly efficient, the proportion of the yarn tip Y ₁ reaches the outlet of the yarn feeding in the pipe 20B is very high.

The air flow blown from the outlet of the yarn feeding inner tube 20B is changed in direction.
Main nozzle for weft insertion by hitting the direction changing surface 28a of 8
The direction is changed to the side of the inlet 10a of 10 and the jet merges with the jet flow from the direction changing nozzle 29. This combined airflow enters the introduction port 10a, and the yarn tip portion Y ₁ conveyed in the yarn feeding inner tubes 20A, 20B is introduced into the introduction port 10a. The direction changing action by both the direction changing body 28 and the direction changing nozzle 29 enhances the certainty of the insertion of the yarn tip portion Y ₁ into the introduction port 10a, and the efficient feeding action in the yarn feeding inner pipes 20A, 20B. In combination, it ensures the threading of the weft insertion main nozzle 10.

Outer yarn supply tubes 21A, 21B that enhance the certainty of such threading
The direction changer 28 is driven by the air cylinders 23 and 27, which are the simplest linear actuators, and it is easy to simplify the mechanism and the drive control. By such simplification, the reliability of driving and the processing time can be reduced.

Although the yarn tip Y ₁ introduced into the weft insertion for the main nozzle 10 in the blown out from the main nozzle 10 for weft insertion inlet 31a of the weft introducing duct 31 by injection action of the blow nozzle 30
It is forcibly inserted inside. Then, the yarn tip Y ₁ is blown toward the air guide 32 from the outlet 31b of the weft guiding duct 31, it is insufflated into the suction pipe 34 through the air guide 32.

If the thread tip Y ₁ has reached the position of the weft detector 33 in the suction pipe 34, the control computer C continue the yarn feeding miss processing subsequent based on the weft chromatic detection information from the weft detector 33. Although the case threading to the main nozzle 10 for weft insertion as failed yarn tip Y ₁ does not reach to the position of the weft detector 33, the control computer C weft detector 33
When the weft presence detection information from the machine is not obtained within the set time, the electromagnetic valves V ₃ , V ₅ , V ₁₃ , V ₁₀ and V ₁₁ are closed and the electromagnetic solenoid 6 is excited, and the nozzles 13, 19 , 29, 30, and 35 are stopped, and the locking pin 6a is separated from the thread winding surface 5b. When the number of times of threading failure does not reach the set number N, the control computer C performs the subsequent processing operation again from the preliminary winding on the weft length storage device 5, and the number of times of threading failure reaches the set number N. If it does, the alarm of the alarm device 42 is instructed.

If the threading is successful, the control computer C determines the electromagnetic valves V ₃ , V based on the weft presence detection information from the weft detector 33.
_5, V _13, V _10, the excitation and commands closing and the electromagnetic solenoid 6 of the V _11, along with the injection from the nozzle 13,19,29,30,35 is stopped, the locking pin 6a is attached yarn surface 5b Away from. Then, an instruction is issued to open the electromagnetic valve V ₁ , and the air cylinder 38 is operated so as to project. Thus the driven roller 39 is joined to the drive roller 37, the yarn tip Y ₁ is gripped between the two rollers 37 and 39. After joining both rollers 37, 39, the control computer C sets the electromagnetic valve V
_6, V _7, and commands the closure of V _8, the yarn feeding outside pipe 21A, 21B, the thread guide 26
And the direction changer 28 returns to the original position shown in FIGS.
When the thread guide 26 returns to its original position, the thread guide 26
A part of the weft yarn Y passing through the inside is taken out from the yarn feeding inner tubes 20A, 20B to the outside via the slits 20a, 20b, 21a, 21b.

The yarn guide 26 includes a weft on the weft path between the weft measuring and storing device 5 and the main weft insertion nozzle 10, and inner yarn supply tubes 20A and 20B and outer yarn supply tubes 21A and 21B that form the yarn supply path. The yarn guide 26 is provided so that the setting of the yarn feeding path is facilitated. The yarn guides 26 that bring about such simplification are switched and arranged by a simple drive mechanism called an air cylinder 25, and an appropriate yarn feeding path for yarn feeding processing can be set while simplifying the mechanism and operation. .

Subsequently, the control computer C commands the motor M to perform a predetermined amount of forward rotation operation, and the thread winding tube 5a rotates a predetermined amount. Thereby, the weft Y is preliminarily wound in the weft length measuring and storing device 5 by a predetermined amount. After this preliminary winding, the control computer C displays the electromagnetic valve V
_{In addition} to commanding the release of ₁₂ , the operation of the weft take-up motor 36 is commanded. Thereby the thread tip Y ₁ is taken off by the rollers 37 and 39, yarn feeding the tube 20A, the remaining weft slit 20a in 20B, 20b, 21a, drawn all to the outside via 21b.

When weft nervous drawn yarn feeding the tube 20A, to 20B outside thread tip Y ₁ is cut and separated by a fixed blade 10b on the main nozzle 10 for weft insertion by the take-off tension.
The cut piece is picked up by both rollers 37 and 39 and discharged to the dust box by the blow nozzle 35.

When the cut pieces of the yarn tip Y ₁ are all passed through the air guide 32, together with the weft detector 33 detects the weft yarn no, the control computer C is an instruction to deactivation weft thread draw preparative motor 36 in accordance with this, the electromagnetic valve to command the closing of the V _12. As a result, the operation of the weft take-up motor 36 is stopped, the air cylinder 38 is retracted, and the driven roller 39 is separated from the drive roller 37. Then, the control computer C commands the closing of the electromagnetic valves V _11, the air jet from the blow nozzle 35 is stopped. After that, the machine base rotates and shifts to the starting position to prepare for the machine restart.

When a yarn break occurs between the weft cheese 3 and the weft length storage device 5, the yarn break sensor 8 detects that there is no weft, and the control computer C outputs the weft cheese 3 based on this detection information.
A program for pulling out the weft tip portion from the thread and threading the weft measuring and storing device 5 is executed. That is, the electromagnetic valve
While injecting a blowing nozzle 4,9,13 open the _{V 1, V 2, V 3} , to rotate the weft cheese 3 actuates the weft solution舒用motor 2. As a result, the leading end of the weft on the weft cheese 3 is peeled off from the peripheral surface of the weft cheese 3 toward the inside of the weft guide tube 11, and is injected from the weft insertion blow nozzle 9 to introduce the inlet 5c of the weft measuring and storing device 5 Is inserted into. The leading end of the weft inserted into the introduction port 5c is blown out from the yarn winding tube 5a, and is introduced into the suction pipe 15 by an airflow between the winding nozzle 13 and the suction pipe 15. Thereafter, the threading to the weft insertion main nozzle 10 is performed in the same manner as described above.

The present invention is, of course, not limited to the above embodiment. For example, a tandem nozzle may be used in place of the yarn guide 26, or a direction changing nozzle 29 attached to the direction changing body 28.
, Or the thread guide 26, or one or both of the outer yarn feed tubes 21A and 21B, and instead of the direction changer 28, the weft inner pipe 20B Embodiments such as mounting an insertion nozzle pointing toward the inlet of the main nozzle for insertion are also possible.

Further, in the present invention, the yarn winding tube 5a is controlled to stop so as to be directed to the inlet of the branch tube 14, and the yarn feeding inner tube 20A is controlled.
Has a large-diameter conical shape with a larger diameter than the turning radius of the bobbin winding tube 5a, and this conical opening is used as the weft measuring and storing device 5
An embodiment arranged immediately before is also possible.

[Effects of the Invention] As described in detail above, the first invention provides a slit in a yarn feeding tube that forms a yarn feeding route, and an annular guide that can be switched between a normal weft passage and a yarn feeding route. Is installed,
On the inlet side of the yarn feeding tube, a guide air flow generating means for introducing the weft yarn drawn out from the yarn winding tube into the yarn feeding tube is installed, so that the yarn is reliably inserted into the yarn feeding tube, and the yarn feeding processing time is reduced. It is possible to set an appropriate yarn feeding path while simplifying the mechanism that tends to shorten and simplifying the operation.

A second aspect of the invention is to dispose a wound yarn eliminating blow nozzle for eliminating unwound yarn remaining on the yarn winding surface in the vicinity of the yarn winding surface, and to supply the yarn to the outlet side of the slitted yarn supplying tube. Since a direction changer that guides the air flow introduced into the pipe to the inlet of the weft insertion main nozzle is installed, the winding residual yarn can be reliably removed and the air flow that blows through the yarn feeding pipe is The excellent effect that the weft conveyed in the yarn feeding pipe can be easily inserted into the weft insertion main nozzle is smoothly introduced into the inlet of the insertion main nozzle.

[Brief description of the drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a plan sectional view showing a yarn feeding guide state during operation of a loom, and FIG.
FIG. 3 is a side sectional view in the same state as that of FIG. 3, FIG. 3 is a sectional view taken along the line AA of FIG. 2, and FIG. 4 is a side sectional view showing a state in which a wound residual yarn is introduced into a suction pipe of a blower. FIG. 6 is a cross-sectional view taken along the line BB of FIG. 4, FIG. 6 is a side cross-sectional view showing a state in which the leading end of the weft is passed to the joining position of the take-off roller pair, FIG. (E) is a flowchart which shows a yarn supply processing program. Blow nozzle 13 for removing the winding yarn, blowing nozzle 19 constituting the induction air flow generating means, yarn feeding inner pipes 20A, 20B, yarn feeding outer pipe 21.
A, 21B, slits 20a, 20b, 21a, 21b, thread guide 26, direction change body 28.

Claims (2)

(57) [Claims] In a jet loom, a weft drawn from a weft cheese is measured and stored by a winding type weft measuring and storing device, and the measured and stored weft is injected from a weft inserting main nozzle into a jet loom. The weft supply pipe is arranged on a path distant from the normal weft path that introduces the weft drawn from the thread winding pipe of the weft length storage device to the weft insertion main nozzle, and the weft length storage device and the weft insertion device A slit capable of taking in and out of the weft between the main nozzle and the main nozzle is provided in the yarn supply pipe, and an annular guide for guiding the weft is arranged between the weft length measuring and storing device and the main nozzle for inserting weft. An annular guide is mounted on the switching drive means so as to be switchable between the path and the yarn supply path in the yarn supply pipe, and guide air for introducing the weft drawn from the yarn winding pipe into the yarn supply pipe at the inlet side of the yarn supply pipe. Flow generating means A yarn feeding processor in a jet loom. 2. A jet loom in which a weft drawn from a weft cheese is measured and stored by a winding type weft measuring and storing device, and the measured and stored weft is injected into a weft inserting main nozzle. The weft supply pipe is arranged on a path distant from the normal weft path that introduces the weft drawn from the thread winding pipe of the weft length storage device to the weft insertion main nozzle, and the weft length storage device and the weft insertion device A slit that allows the weft to be inserted and removed from the main nozzle is provided in the yarn supply tube, and a blow nozzle is installed near the yarn winding surface to eliminate the remaining yarn wound on the yarn winding surface. At the same time, an induction air flow generating means is installed on the inlet side of the yarn feeding tube to introduce the weft yarn drawn from the bobbin winding tube into the yarn feeding tube, and is introduced on the outlet side of the yarn feeding tube into the yarn feeding tube. Air flow into the weft insertion main nozzle. A yarn supply processing device in a jet loom in which a direction changing body for guiding to a mouth is provided, and the direction changing body is attached to a switching drive means so as to be switchable between a direction changing operation position and a retreat position.