JP2765121B2 - Yarn feeder in jet looms - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a weft yarn in the case of a weft supply error such as replacement of a weft cheese or breakage of a weft yarn between a weft cheese and a winding type weft length storage device. The present invention relates to a device for guiding and inserting a leading end of a weft drawn from cheese into a weft measuring and storing device.

[Prior Art] A yarn feeding guide of this type is disclosed in US Pat. No. 48320919 and JP-A-1-62377. USP-Number
In the apparatus of 48320919, a plurality of yarn feed guide units each including a weft yarn guide nozzle for guiding the weft cheese and the weft yarn to an introduction portion of a winding type weft length measuring and storing device are provided. One of the units is arranged at a predetermined yarn feeding position. Then, when the weft of this yarn feed guide unit is cut between the weft cheese and the weft length measuring and storing device, another yarn feed guide unit is switched to the yarn feed guide position.

In Japanese Patent Application Laid-Open No. 1-62377, a yarn gripper is installed on the side of the entrance of a yarn feeding guide nozzle arranged in front of a winding type weft measuring and storing device, and is located next to a weft cheese in use. The leading end of the weft yarn of the spare cheese arranged in the above is gripped by the yarn gripper. When the weft of the used weft cheese is cut between the weft cheese and the weft measuring and storing device, the yarn gripper is disposed near the entrance of the yarn feeding guide nozzle, and the weft tip gripped by the yarn gripper is moved by the yarn gripper. Suction is introduced into the yarn feed guide nozzle by the suction action of the yarn feed guide nozzle.

[Problems to be Solved by the Invention] However, USP-Number 48320919 discloses a large-scale configuration in which a plurality of yarn feeding guide units each including a weft cheese and a yarn feeding guide nozzle are circulated or rotated, and the installation space is large. The problem with is very large. In addition, it is difficult to control stoppage of the yarn feed guide nozzle, which constitutes such a large-sized yarn feed guide unit, to face the inlet of the weft length measuring and storing device, and expect reliable threading. Can not.

Although there is no problem regarding the installation space in Japanese Patent Application Laid-Open No. 1-62377, the insertion of the weft end from the yarn gripper to the entrance of the yarn feeding guide nozzle relies only on the suction action of the paper feeding guide nozzle. We cannot expect reliable threading.

SUMMARY OF THE INVENTION An object of the present invention is to provide a yarn feeding guide device capable of achieving reliable threading while avoiding a problem relating to an installation space.

Means for Solving the Problems In the first invention, for this purpose, a pair of yarn feeding guide nozzles for guiding a weft drawn from the weft cheese to an introduction portion of a winding type weft length measuring and storing device, For switching one of the yarn feed guide nozzles and the weft introduction portion of the weft length measuring and storing device so that one of the injection openings of the pair of yarn feed guide nozzles and the entrance of the weft introduction portion are switched to face each other. In the second invention, the yarn feeding guide device is constituted by the opposed switching means, and between the injection port of the pair of yarn feeding guide nozzles and the weft introducing portion which are immovable with respect to the introducing portion of the weft length measuring and storing device. A yarn feeding guide device which is provided with a shielding plate, and a shielding switching means for switchingly disposing the shielding plate in an opposing gap between one of the injection ports of the pair of yarn feeding guide nozzles and the entrance of the weft introduction portion. Was configured.

[Operation] In the first invention, either one of the pair of yarn feeding guide nozzles and the introduction section of the weft side long storage device is switched and arranged by the opposing switching means, and one of the injection port of the pair of yarn feeding guide nozzles and the weft introduction. And the entrance of the section. In this state, by injecting the yarn feed guide nozzle at the threading position, the leading end of the weft passed through the yarn feed guide nozzle is blown into the weft introduction section.

In the second invention, in which both the pair of yarn feeding guide nozzles and the weft introducing portion are in the immobile state, the ejection ports of both yarn supplying guide nozzles and the inlet of the weft introducing portion are always in the facing state, and the shielding plate is used. The injection port side of the yarn feeding guide nozzle for guiding the weft of the weft cheese in the standby state is shielded. When the weft in the standby state is blown into the weft introduction section, the shielding plate is switched to the ejection port side of the other yarn feeding guide nozzle by the shielding switching means. In the case of threading to the yarn feed guide nozzle side, a suction flow is generated at the inlet by the jetting action of the yarn feed guide nozzle, and the weft is passed through the yarn feed guide nozzle when the leading end of the weft is brought close to the inlet. The jet flow from the yarn feeding guide nozzle for performing the threading is blocked by the shielding plate, and does not adversely affect the weft in use.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

There are four weft cheeses 1A, 1B,
2A and 2B are mounted and supported, and the weft end of the weft cheese 1A and the weft start end of the weft cheese 1B are connected,
The weft end of the weft cheese 2A is connected to the weft start end of the weft cheese 2B.

In front of the weft cheeses 1A, 1B, 2A, 2B, there is disposed a weft measuring and storing device 3 of a known winding type, and a yarn winding tube 3a thereof.
Is rotated by a motor M different from a loom driving motor (not shown). With the rotation of the yarn winding tube 3a, the weft fed from the yarn winding tube 3a is controlled to be drawn out from the yarn winding surface 3b by the protrusion and the depression of a locking pin 4a driven by an electromagnetic solenoid 4. At the entrance 3d of the weft introduction part 3c communicating with the yarn winding tube 3a, a yarn break sensor 5 composed of a transmission type photoelectric sensor is installed, and at the curved part of the weft introduction part 3c, a weft insertion blow nozzle 6 is attached. ing. Weft insertion blow nozzle 6 is connected to a pressurized air supply tank (not shown) through a solenoid valve V ₄ for the two-way valve type. The jet airflow from the weft insertion blow nozzle 6 blows out from the yarn winding tube 3a communicating with the weft introduction part 3c of the weft length measuring and storing device 3 toward the weft insertion main nozzle 7 side.

A plurality of winding yarn removing blow nozzles 9 are mounted on a weft guide tube 8 supporting the electromagnetic solenoid 4, and their injection directions are set so as to point on the yarn winding surface 3b. The jet air flow from the yarn removing blow nozzle 9 sweeps over the yarn winding surface 3b. When the locking pin 4a is separated from the yarn winding surface 3b, the yarn on the yarn winding surface 3b winds the yarn. Removed from face 3b. Winding yarn for exclusion blowing nozzle 9 is connected to the pressure air supply tank through the solenoid valve V ₅ for the two-way valve type.

Between the upper weft cheese 1A, 1B and the weft introduction part 3c, a yarn feed guide nozzle 10 is arranged rotatably about a spindle 11, and the lower weft cheese 2A, 2B and the weft introduction are provided. A yarn feed guide nozzle 12 is disposed between the portion 3c and the portion 3c so as to be rotatable about a support shaft 13. An air cylinder 14 is vertically disposed immediately below both yarn feed guide nozzles 10, 12, and a pair of engaging pins 14b, 14c are provided on a drive rod 14a thereof in a vertically projecting manner. , Both yarn feed guide nozzles 10 and 12 have an engagement hole 1
0a and 12a are provided. The drive rod 14a and the yarn feed guide nozzles 10, 12 are connected to both engagement pins 14b, 14c and both engagement holes 10a, 12a.
Operatively connected by an engagement relationship with the drive rod
By the emergence of 14a, the injection ports 10b of both yarn feeding guide nozzles 10, 12
Only one of 12b faces the entrance 3d of the weft introduction part 3c of the weft length measuring and storing device 3. That is, as shown in FIG. 1, when the drive rod 14a is in the retracted state, the upper yarn feeding guide nozzle 10 is arranged at the threading position, and the lower yarn feeding guide nozzle 12 is arranged at the retracted position. Drive rod 14a as shown
In the protruding state, the lower yarn feeding guide nozzle 12 is arranged at the threading position, and the upper yarn feeding guide nozzle 10 is arranged at the retracted position.

Both yarn feed guide nozzles 10 and 12 are two-way valve type solenoid valves V ₁ and V
Is connected to a pressurized air supply tank through a _2, the air cylinder 14 is connected to a pressurized air supply tank through the solenoid valve V ₃ of the three-way valve type. Electromagnetic valve V ₁ was able energized by the ON operation of the manual switch 15, the solenoid valve V ₂ may be energized by the ON operation of the manual switch 16.

Blow nozzle 17 across the immediately preceding region of the small-diameter opening of the weft guide tube 8 and the suction pipe 18 is arranged to face, blow nozzle 17 to the pressure air supply tank through the solenoid valve V ₆ of the two-way valve-type While being connected, the suction pipe 18 is connected to the blower 19. A fixed blade 18a is attached to an inlet of the suction pipe 18, and a weft detector 20 including a transmission type photoelectric sensor is installed in the suction pipe 18.

An arm 21 is rotatably supported by a motor 22 near the suction pipe 18, and a fixed holding body 21a is fixed to a tip end of the arm 21. A movable gripper 21b is supported at the tip of the arm 21 so as to be rotatable and connectable to the fixed gripper 21a, and an electromagnetic solenoid 23 is operatively connected to the movable gripper 21b. The two grippers 21a and 21b are always in an open state, and the two grippers 21a and 21b are joined by the excitation of the electromagnetic solenoid 23. The passage area of the two grippers 21a and 21b (hereinafter referred to as a thread gripper) due to the swing of the arm 21 intersects with the area between the blow nozzle 17 and the suction pipe 18, and the entrance of the main nozzle 7 for weft insertion. It is set to be close to the vicinity of 7a.

A thread break sensor 24 composed of a transmission type photoelectric sensor is installed in the entrance 7a of the weft insertion main nozzle 7, and a fixed blade 7b is provided at the upper end of the weft insertion main nozzle 7 with a weft insertion main nozzle 7. It is fixed so as to slightly protrude from the tip of. A blow nozzle 25 is provided immediately below the weft insertion main nozzle 7, and its injection direction is set so as to intersect the injection path of the weft insertion main nozzle 7.
Immediately above the weft insertion main nozzle 7, a weft introduction duct 26 is provided, and its inlet 26 a is set at a position facing the injection port of the blow nozzle 25 across the injection path of the weft insertion main nozzle 7. At the same time, the outlet 26b is set at a position facing the rear of the weft insertion main nozzle 7.
An air guide 27 is provided behind the outlet 26b, and a weft detector 28 composed of a transmission type photoelectric sensor is mounted in a tapered internal passage of the air guide 27. A suction pipe 29 is provided behind the air guide 27, and the outlet side of the suction pipe 29 is curved toward a dust box (not shown), and the blow nozzle 30 is directed toward the dust box at this curved portion. It is connected.

The main nozzle 7 for weft insertion, the blow nozzle 25, the weft introduction duct 26, the air guide 27, and the suction pipe 29 are all mounted on the slay, and swing together with the swing of the slay. A weft take-up motor 31 is provided behind the swing region of each of these members 7, 25, 26, 27, 29, and an air cylinder 33 is provided immediately above a drive roller 32 operatively connected to the weft take-up motor 31. It is arranged 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 projecting operation of the air cylinder 33.

Weft insertion for the main nozzle 7 and the blow nozzle 25, 30 is connected to the pressure air supply tank through an electromagnetic valve V _7, V _8, V ₉ of any two-way valve type, the air cylinder 33 is a three-way valve It is connected to a pressurized air supply tank through an electromagnetic valve V ₁₀ type. As shown in FIG. 7, each solenoid valve V ₁
~ V ₁₀ , motors 22, 31, M, blower 19 and electromagnetic solenoid 4,
23 receives command control of a control computer C different from the loom control computer. The control computer C with the opening and closing control of the electromagnetic valve V ₁ ~V ₁₀ in response to the detection signal from the yarn breakage sensor 5 and 24 and the weft detector 20, 28, motor 22 and 31, M, blower 19 and the electromagnetic The solenoids 4 and 23 are controlled.

FIGS. 8 (a) to 8 (d) are flow charts showing a weft supply processing program when a weft break occurs between the weft cheeses 1A, 2A and the weft length measuring and storing device 3. The yarn processing operation will be described.

Second and third figure represents the yarn feeding state of the weft Y ₁ drawn from the weft cheese 1A during operation of the loom, the injection port of the yarn feed guide nozzle 10
10b points to the entrance 3d of the weft introduction part 3c. That is, the electromagnetic valve V ₃ is demagnetized.

When the weft Y ₁ on the yarn feeding path between the weft cheese 1A and weft measuring and storage device 3 disconnects, yarn breakage sensor 5 detects the yarn breakage, yarn feeding error detecting 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 the yarn feeding error detection signal, and the loom control computer issues a loom stop command in response to the signal. As a result, the weft insertion main nozzle 7 on the slay stops near the cloth fell position of the woven fabric. After the machine stand is stopped, the loom control computer instructs the machine machine to reverse by a predetermined amount, and the weft insertion main nozzle 7 is moved to the last retreat position (threading position) of the swinging area shown in FIG.

After machine frame reverses, the control computer C commands the opening and the excitation of the electromagnetic solenoid 4 of the solenoid valve V _8, the blow nozzle
25 is ejected, and the locking pin 4a is separated from the thread winding surface 3b. Then, the control computer C commands the opening of the electromagnetic valves V _7, the main nozzle 7 ejects a weft insertion. When there is a remaining yarn to be wound on the yarn winding surface 3b, the remaining yarn to be wound is ejected from the weft insertion main nozzle 7;
Is introduced into the weft introduction duct 26 by the powerful blow-up action, and reaches the installation position of the weft detector 28 in the air guide 27.

The control computer C with commanding closing of electromagnetic valves V _7, V ₈ on the basis of the weft chromatic detection signal from the weft detector 28, and commands the opening of the electromagnetic valves V _10, the main nozzle 7 and the blow weft inserting When the injection of the nozzle 25 stops, the rollers 32 and 34 are joined. Then, the control computer C commands the operation of the opening and take-off motor 31 of the electromagnetic valve V _9, together with the blow nozzle 30 injects, take-off weft by the roller 32, 34 is started. Weft is paired with rollers 32,34
When passing through, the weft detector 28 detects the absence of the weft, and the control computer C detects the weft absence based on the weft absence detection signal.
Command 31 to stop operation. Further, the control computer C commands the closing of the electromagnetic valves V ₉ and V ₁₀ and the demagnetization of the electromagnetic solenoid 4. Thereby, the injection of the blow nozzle 30 is stopped, the rollers 32 and 34 are separated from each other, and the locking pin 4a is engaged with the thread winding surface 3b.

If there is no remaining yarn wound on the yarn winding surface 3b, a weft detector
28 does not detect the presence of a weft, and the control computer C
When the weft presence detection signal is not obtained within the predetermined time, the process proceeds to the yarn feeding process after the winding residual yarn process.

The control computer C with directing the operation of the blower 19, commands the opening of the solenoid valve V _4, V _6. As a result, an airflow toward the suction pipe 18 is generated between the blow nozzle 17 and the suction pipe 18, and air is jetted from the weft insertion blow nozzle 6 to pass through the yarn winding pipe 3 a and from the tip of the yarn winding pipe 3 a. It blows out toward the weft guide tube 8. The air flow blown out from the yarn winding tube 3a is converged by the weft guiding tube 8 to cause the blow nozzle 17 and the suction pipe to pass through the leading end opening of the weft guiding tube 8.
18, and is introduced into the suction pipe 18 after being joined to the air flow between the blow nozzle 17 and the suction pipe 18.

The control computer C grasps the demagnetization state of the solenoid valves V _3, the electromagnetic valve V ₁ on the basis of the demagnetization state,
To command one of the opening of the V _2. That is, the electromagnetic valve
If V ₃ is in a demagnetized state, the control computer C is an electromagnetic valve
Commanding the opening of the V _1, the upper yarn feed guide nozzle 10 injects. The control computer C if solenoid valve V ₃ is excited state to command the opening of the electromagnetic valve V _2, the lower yarn feed guide nozzle 12 injects.

In the case of Figure 1 is the injection port 10b of the yarn feed guide nozzle 10 is directed to the inlet 3d of weft guiding portion 3c, the electromagnetic valve V ₃ is demagnetized. Accordingly, the control computer C commands the opening of the electromagnetic valve V _1, the supply yarn guide nozzle 10 injects. Cutting the weft Y ₁ occurs in yarn feed guide nozzle 10, the injection action the cutting end of the supply yarn guide nozzle 10 when the cut end of the weft yarn Y ₁ is entered the feed yarn guide nozzle 10 in It is blown into the weft introduction part 3c. Yarn when the cut end of the weft yarn Y ₁ is as long insufflated into the weft guiding portion 3c detects this yarn breakage sensor 5, the cut ends of the weft Y ₁ does not enter into the supply yarn guide nozzle 10 in the The cut sensor 5 does not detect the presence of a weft.

If the control computer C cannot obtain the weft presence detection information from the yarn break sensor 5 within a predetermined time, the control computer C sets the electromagnetic valve V ₃
Is released (excitation), and the air cylinder 14 protrudes. As a result, the yarn feed guide nozzle 10 rotates upward around the support shaft 11, the yarn feed guide nozzle 12 rotates upward around the support shaft 13, and the injection port 12b of the yarn feed guide nozzle 12 feeds. Inlet 3 of weft introduction part 3c instead of injection port 10b of yarn guide nozzle 10
Opposes d. That is, as shown in FIG. 4, the yarn feeding guide nozzle 10 shifts from the threading position to the retreat position, and the yarn feeding guide nozzle 12 shifts from the retreat position to the threading position. Then, the control computer C commands the opening of the electromagnetic valve V _2, the yarn feed guide nozzle 12 is injected toward the inlet 3d of weft guiding portion 3c.

Weft Y ₂ which is passed through the yarn feed guide nozzle 12 is insufflated into the weft introduction portion 3c by injection action of yarn feed guide nozzle 12. Tip of the weft Y ₂ which is insufflated in the weft guiding portion 3c is discharged from yarn winding tube 3a riding ejecting air from the weft insertion a blow nozzle 6 and ejected from the distal end opening of the weft guide tube 8. Accordingly, the tip portion of the weft Y ₂ is introduced rides on the air flow into the suction pipe 18 between the blow nozzle 17 and the suction pipe 18, subjected to suction gripping action of the suction pipe 18. When the tip portion of the weft Y ₂ is introduced into the suction pipe 18, the weft detector 20
Detects the presence of the weft, and the subsequent yarn supply processing is continuously performed.

In this embodiment, the threading to the weft length measuring and storing device 3 is performed based on the rotation switching arrangement of the yarn feeding guide nozzles 10 and 12, and the movement of the weft cheeses 1A and 1B is not accompanied. Therefore, the configuration of the present embodiment is very compact compared with the conventional configuration in which one unit including the weft cheese and the yarn feeding guide nozzle is switched and the entire unit is switched, and the installation space is problematic. Is eliminated. Moreover, both feed guide nozzles 1
The injection ports 10b, 12b of 0, 12 are relatively close to the weft introduction part 3c, and the rotation amount of the yarn feeding guide nozzles 10, 12 is slight in the switching opposed arrangement of the injection ports 10b, 12b and the entrance 3d of the weft introduction part 3c. Only needs to be done. Therefore, a small air cylinder 14 is sufficient and the air cylinder 14
There is no need to perform special control for accurately opposing the entrances 10b, 12b and the entrance 3d, and the weft insertion into the weft introduction part 3c is performed reliably.

If the threading fails such that the leading end of the weft Y ₂ does not pass through the weft length measuring and storing device 3, the weft Y ₂ does not reach the inside of the suction pipe 18.
If the weft presence detection information is not obtained within the set time, the operation of the blower 19 and the closing of the electromagnetic valves V ₂ , V ₄ , V ₆ are commanded, and an alarm command is sent to the alarm device 35.

State of FIG. 1, i.e. the cut end of the weft yarn Y ₁ by injection from yarn feed guide nozzle 10 in a state where the injection port 10b of the yarn feed guide nozzle 10 faces the inlet 3d of the weft introduction portion 3c suction pipe When it is introduced into the weft 18, the weft detector 20 detects the presence of the weft, and the subsequent yarn supply processing is continued. or,
Closing weft deactivation and the electromagnetic valve V ₂ of the blower 19 when the cut end portion of the Y ₁ does not reach inside the suction pipe 18, V _4, V _6, alarm warning device 35 is performed.

If the weft Y ₂ is successfully threaded to the suction pipe 18,
The control computer C commands the closing of the electromagnetic valves V ₂ , V ₄ , V ₆ , and the injection from the yarn feeding guide nozzle 12 and the blow nozzles 6, 17 stops. This point the blower 19 is operated, the tip portion of the weft Y ₂ is sucked gripped by the suction pipe 18. Under this condition, the control computer C commands the operation of the motor M by a predetermined amount, and the thread winding tube 3a rotates by a predetermined amount. Thus the yarn winding plane 3b weft Y ₂ is a predetermined amount auxiliary wound. Next, the control computer C instructs the motor 22 to rotate forward by a predetermined amount and to excite the electromagnetic solenoid 23. Thereby the thread gripper 21a, 21b is the tension area of the weft Y ₂ in the open state rotates passes, closed after passing through the tension area of the weft Y _2. Thread gripper 21
a, the weft Y ₂ yarn grippers 21a by closing operation of the 21b, is gripped by 21b, the fixed blade on the suction pipe 18 when the gripping weft Y ₂ moves to the inlet 7a of the main nozzle 7 for weft insertion 18
It is cut and separated by contact with a. Thereby the thread gripper 21a of the weft Y _2, is extending length from 21b furnished to length,
The extending ends from the thread grippers 21a and 21b are arranged near the entrance 7a of the main nozzle 7 for weft insertion.

After forward rotation deactivation of a predetermined amount of the motor 22, the control computer C commands the deactivation of the closing and the blower 19 of the electromagnetic valve V _6. Next, the control computer C sends the electromagnetic valves V ₈ ,
Commanding the opening of the V _7, air is injected from the blow nozzle 25 and the weft insertion for the main nozzle 7. The injection pressure at the blow nozzle 25 is sufficiently higher than the injection pressure at the weft insertion main nozzle 7, and the injection air flow from the weft insertion main nozzle 7 joins the injection air flow from the blow nozzle 25.

Suction airflow is generated at its inlet 7a by injection weft insertion for the main nozzle 7, the yarn gripper 21a, the tip portion of the weft Y ₂ extending from 21b is introduced into the main nozzle 7 for weft insertion.
Thereafter, the control computer C instructs the demagnetization of the electromagnetic solenoid 23 and the reverse rotation operation of the motor 22 by a predetermined amount.
21b returns from releasing the tip portion of the weft Y ₂ to the standby position. As a result, the leading end of the weft Y ₂ introduced into the weft insertion main nozzle 7 is blown out from the weft insertion main nozzle 7, but the weft introduction duct 26
Is forcibly inserted into the entrance 26a. Then, the tip portion of the weft Y ₂ is balloon toward the outlet 26b of the weft introducing duct 26 into the air guide 27, are insufflated into the suction pipe 29 through the air guide 27.

When the distal end portion of the weft Y ₂ has reached the position of the weft detector 28 in the suction pipe 29, the control computer C weft detector
Based on the weft presence detection information from 28, the subsequent yarn supply processing is continuously performed. Tip of the weft Y ₂ when the threading of the weft insertion for the main nozzle 7 as failed does not reach the position of the weft detector 28, the weft chromatic detection information from the control computer C weft detector 28 deactivation of the blower 19 may not be obtained within the set time, and instructs the excitation of the closing and the electromagnetic solenoid 4 of the solenoid valves V _7, V _8, the injection from the main nozzles 7 and the blow nozzle 25 for weft insertion Stops, and the locking pin 4a separates from the thread winding surface 3b. When the number of times of threading failure does not reach the set number of times n, the control computer C sets the preliminary winding on the weft length measuring and storing device 3 and the winding yarn by the injection of the winding yarn removing blow nozzle 9 in the separated state of the locking pin 4a. The rejection, the suction winding of the rejected winding yarn by the suction pipe 18 and the subsequent processing operations are performed, and when the number of times of threading failure reaches the set number n, an alarm of the alarm device 35 is issued.

If the threading is successful, the control computer C determines whether the electromagnetic valves V ₇ , V ₇ ,
Commands the closing and demagnetization of the electromagnetic solenoid 4 V _8, the injection from the main nozzle 7 and the blow nozzle 25 for weft insertion is stopped, the locking pin 4a is engaged with the yarn winding surface 3b. Then commands the opening of the electromagnetic valves V _10, the air cylinder 33 is protruded actuated. As a result, the driven roller 34 is
Joined to the distal end portion of the weft Y ₂ is gripped between the two rollers 32 and 34. Subsequently, the control computer C instructs the motor M to perform a predetermined amount of normal rotation operation, and the thread winding tube 3a rotates a predetermined amount. Thereby the weft measuring and storage device 3 weft Y ₂ is a predetermined amount auxiliary wound. After this preliminary winding, the control computer C with an instruction to open the electromagnetic valve V _9, for commanding the operation of the weft yarn take-off motor 31. Thereby the weft Y ₂ is taken off by the rollers 32 and 34, the weft Y ₂ is cut and separated by the fixed blade 7b of the main nozzle 7 for weft insertion by the take-off tension. The cut piece is picked up by the rollers 32 and 34 and discharged to the dust box by the blow nozzle 30.

When the cut pieces of the weft Y ₂ all pass through the air guide 27,
Weft detector 28 detects the weft yarn no, the control computer C to command an operation stop of the motor 31 taking over the weft accordingly, instructs the closing of the electromagnetic valve V _10. This stops the operation of the weft take-up motor 31 and causes the air cylinder
The driven roller 34 is separated from the drive roller 32 by the immersion operation of 33. Then, the control computer C commands the closing of the electromagnetic valve V _9, the air jet from the blow nozzle 30 is stopped. Thereafter, the machine rotates to the start position and prepares for machine restart.

When the weft yarn Y ₁ of the weft cheese 1A side is cut without leaving the yarn feed guide nozzle 10 in it is necessary to insert the cut end of the weft Y ₁ yarn feeding guide nozzle 10. This thread insertion is weft
Occurs after threading of Y _2, it may be ON the manual switch 15 close the cut end of the weft yarn Y ₁ to the inlet of the yarn feed guide nozzle 10. Electromagnetic valve V ₁ is opened by the ON of the manual switch 15, the injection port 10b of the weft yarn Y ₁ of the cut end yarn feeding guide nozzle 10 by suction effect caused by the injection of yarn feed guide nozzle 10 is an inlet of the weft guiding portion 3c since the deviated from the position facing the 3d, no adverse effect against the weft Y ₂ injection effect during use of the yarn feed guide nozzle 10.

Manual switch 16 and ON operation it is sufficient to inject the yarn feed guide nozzle 12, the injection port 12b of the yarn feed guide nozzle 12 in this case is weft in the case of inserting the weft yarn Y ₂ to the yarn feed guide nozzle 12 Because it is out of the position facing the entrance 3d of the introduction section 3c,
Injection effect yarn feed guide nozzle 12 does not adversely affect against the weft Y _1.

The yarn feed guide nozzles 10, 12 may be moved linearly in order to cut and arrange the injection ports 10b, 12b of the yarn feed guide nozzles 10, 12.

In the embodiment, the injection ports 10b, 12b of the yarn feeding guide nozzles 10, 12
In the opposing switching between the weft introduction part 3c and the entrance 3d, the yarn feed guide nozzles 10 and 12 are rotated, but an embodiment in which the weft introduction part 3c is rotated is also possible. In the embodiment of FIG. 9, the weft introducing section 3c is rotatably mounted on the weft measuring and storing device 3, and the sector gear 36 is mounted on the weft introducing section 3c.
A rack 37 a driven by the air cylinder 37 is meshed with the sector gear 36. The yarn feed guide nozzles 10 and 12 are fixed, and the operation of the air cylinder 37 rotates the weft introducing portion 3c, and the inlet 3d of the yarn feed guide nozzles 10 and 12 is connected to the injection ports 10b and 1 of the yarn feed guide nozzles 10 and 12.
It is switched and opposed to 2b. With such a configuration, the same operation and effect as in the above embodiment can be obtained.

In the embodiment of FIG. 10, the yarn feeding guide nozzles 10, 12 and the weft introduction part 3c are all fixed, and the injection ports 10b, of the yarn supply guide nozzles 10, 12, both pointing to the inlet 3d of the weft introduction part 3c. A shielding plate 38 is interposed between the 12b and the weft introduction part 3c. The shield plate 38 is rotatably supported by a support shaft 38a, and is switched between a solid line position and a dashed line position in FIG. At the solid line position, the jet flow from the yarn feed guide nozzle 10 is diverted to the side from the entrance 3d of the weft introduction part 3c,
At the dashed line position, the jet flow from the yarn feeding guide nozzle 12 is diverted to the side from the inlet 3d. That is, the weft Y ₁ is the shielding plate 38 is disposed to the dashed line position when in use, when the weft Y ₂ is in use is arranged to the solid line position. Then, the yarn feeding guide nozzles 10 and 12
The jet flow at the time of threading to the thread is diverted to the side from the inlet 3d by the shielding plate 38, and does not adversely affect the weft in use. In this embodiment, the same operation and effect as those of the above embodiments can be obtained.

The present invention is also applicable to a jet loom having a plurality of weft insertion main nozzles.

[Effects of the Invention] As described above in detail, the first invention is to rotate either one of the pair of yarn feeding guide nozzles and the weft introduction portion of the weft length measuring and storing device, and to rotate any one of the pair of yarn feeding guide nozzles. Since one of the ejection ports and the entrance of the weft introduction section are switched and opposed, the opposition between the ejection port and the entrance of the weft introduction section is switched by a slight movement of the yarn supply guide nozzle or the weft introduction section,
This provides an excellent effect that the threading to the weft length measuring and storing device can be reliably achieved with a simple and compact configuration.

Further, in the second invention, the shielding plate is switched to an opposing gap between one of the injection ports of the pair of weft guide nozzles and the entrance of the weft introduction section which are immovable with respect to the introduction section of the weft length storage device. Since the arrangement is arranged, an excellent effect that the same effect as that of the first invention can be obtained with a simple configuration of the switching arrangement of the shielding plate is obtained.

[Brief description of the drawings]

1 to 8 show an embodiment of the present invention.
Fig. 2 is a side view of a main part, Fig. 2 is a plan sectional view showing a yarn feeding guide state during operation of the loom, Fig. 3 is a side sectional view of the same state as Fig. 1,
FIG. 4 is a side view of a main part showing a state in which the yarn feeding guide nozzles are switched and arranged, FIG. 5 is a plan sectional view showing a state in which the weft is passed through a weft length measuring and storing device, and FIG. 7 is a side sectional view showing a state where the roller pair is passed to the joining position, and FIG.
The drawings are block diagrams, FIGS. 8 (a) to 8 (d) are flowcharts showing a yarn feeding processing program, and FIGS. 9 and 10 are side views of main parts showing another example of the present invention. Weft cheese 1A, 2A, weft measuring storage device 3, weft introduction unit 3
c, inlet 3d, yarn feed guide nozzles 10, 12, injection ports 10b, 12b, air cylinders 14 and 37 as opposing switching means, shielding plate 38,
An air cylinder 39 as a shielding switching means.

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. A pair of yarn supply guide nozzles for guiding the weft drawn from the weft cheese to the weft introduction unit of the weft length storage device; and one of the pair of yarn supply guide nozzles and the weft introduction unit of the weft length measurement storage device And a facing switching means for switching and facing one of the injection ports of the pair of the yarn feeding guide nozzles and the inlet of the weft introduction section. 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. A pair of yarn feed guide nozzles for guiding the weft drawn from the weft cheese to the weft introduction unit of the weft length measuring and storing device, and a pair of yarn feeders immovable with respect to the weft introducing portion of the weft length measuring and storing device. The shielding plate is disposed between the ejection opening of the guide nozzle and the weft introduction portion, and the shielding plate is switched to a gap facing the ejection opening of one of the pair of yarn supply guide nozzles and the entrance of the weft introduction portion. A yarn feeding guide device in a jet loom, comprising a shield switching means for disposing.