JPH01162847A - Inferior weft yarn treatment in shutteless loom - Google Patents

Abstract

PURPOSE: To provide the subject treating method comprising such a practice that, defective wefts are placed within the range of the jet action of weft inserting auxiliary nozzles to ensure the defective wefts on a cloth fell to be subject to separatory force toward a warp shed side, with the result that the defective wefts are smoothly and quickly separated from the cloth fell irrespectively of weave width magnitude. CONSTITUTION: This treating method of defective wefts in a shuttleless loom comprises such a practice that, defective wefts Y' are moved and placed within the range of the jet action of weft inserting auxiliary nozzles 12, 12A by the retreating action of the weft inserting main nozzle 2, jet fluid spraying action or mechanically hooking action or the like involved in machine frame reversion; subsequently, a fluid is jetted from the weft inserting auxiliary nozzles either successively from the weft inserting main nozzle side or wholly simultaneously, with the result that the defective wefts Y' on a cloth fell are separated from the cloth fell into a warp shed successively.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a method for removing abnormally inserted weft yarns woven into a woven fabric.

(Prior art) When a weft insertion error occurs in the jet loom, the machine is stopped based on a weft insertion error detection signal from the weft detector. Since the machine is stopped after inertial operation of the machine for one or more revolutions, the weft yarns that have been inserted incorrectly (hereinafter referred to as "missed yarns") are beaten and woven into the woven fabric just before the machine stops.

A weft processing device for removing the above-mentioned erroneous threads, which become weaving defects, from a woven fabric is disclosed in Japanese Patent Publication No. 56-27621 and Japanese Patent Application Laid-Open No. 1983-1989.
It is disclosed in Japanese Patent Application Laid-open No. 1-245339 and Japanese Patent Application Laid-Open No. 62-21843. In the processing means disclosed in Japanese Patent Publication No. 56-27621, miss yarns are separated from the front of the fabric into the warp opening by jetting fluid from outside the warp opening in the entire area of the fabric, and a suction pipe that can enter into the warp opening from the side A method is adopted in which the misplaced threads are removed by suction. Japanese Unexamined Patent Publication No. 61-24
In the processing means of Publication No. 5339, when the machine is stopped due to the occurrence of a weft insertion error, weft insertion is prevented while the following weft thread remains connected to the error thread, and the receiver is passed to a winding device for pulling out the error thread. Along with this winding operation, the erroneous thread is pulled out from the front of the fabric to the side and removed. JP-A-62-2
In the processing means disclosed in Japanese Patent No. 1843, when the machine is stopped due to a weft insertion error, the following weft is inserted while being connected to the erroneous yarn, and the erroneous yarn is removed from the warp opening by a jet of fluid acting from outside the warp opening. The erroneous yarn is pulled out and removed using the following weft yarn as a clue.

(Problem to be Solved by the Invention) However, in the processing means of JP-A No. 61-245339, the missed yarn is directly pulled out from the front side to the side and separated by one part while being held by the upper and lower warp groups. As the mis-separated yarn progresses toward the opposite side of the weft insertion side, the separation force from the front of the fabric to the inside of the warp opening decreases, and the yarn tension associated with drawing out to the side increases, which tends to lead to yarn breakage. Therefore,
There is a drawback that the drawing speed cannot be increased, and when the weave width is wide, the drawing processing time becomes long.

The processing means disclosed in Japanese Patent Publication No. 56-27621 and Japanese Patent Application Laid-open No. 62-21843, which separates misplaced yarns on the front by using fluid injected from the front side to the inside of the warp opening, does not cause the risk of yarn breakage. It is impossible for the jetted fluid to pass through the warp group from outside the warp opening and effectively act on the misplaced yarns on the fabric front that are being gripped by the warp group. Moreover,
If it is attempted to separate misplaced yarns using jet fluid over the entire weaving width, the time required to separate the misplaced yarns will increase significantly, leading to a decrease in processing efficiency.

Structure of the Invention (Means for Solving the Problems) Therefore, the present invention provides a shuttleless +@ system in which a plurality of auxiliary nozzles pull the weft inserted from a main weft insertion nozzle.
After stopping the machine based on the weft insertion error detection signal, the machine is reversed to the warp opening forming position where the defective weft weaving state is canceled, and the defective weft or the weft connected to it on the main nozzle side for weft insertion is removed. is moved to the injection area of the auxiliary weft insertion nozzle on the side of the main nozzle for weft insertion, and then fluid is jetted from the auxiliary nozzle for weft insertion to remove the defective weft on the fabric from the main nozzle for weft insertion. The weft is sequentially separated into the warp opening toward the insertion side, and the defective weft separated from the fabric front is removed from the warp opening.

(Function) In other words, if the weft yarn following the defective weft yarn is connected to the defective weft yarn, the main nozzle for weft insertion may move backward due to machine reversal, the spraying action of the jetting fluid, or the mechanical The following weft yarn is placed in the spray area of the auxiliary nozzle by means of a hook action or the like.

Next, fluid is ejected from the auxiliary nozzles for weft insertion sequentially from the main nozzle for weft insertion, or all at the same time. As a result, the jetted fluid from the auxiliary weft insertion nozzle on the side of the main weft insertion nozzle acts on the following weft, and the defective weft on the fabric front is separated from the fabric fabric side to the inside of the warp opening via the trailing weft. Due to the spraying direction of the weft inserting auxiliary nozzle, the separating force from the front side to the inside of the warp opening is large, and defective wefts that are being gripped by the upper and lower warp groups easily move from the front to the inside of the warp opening. separated.

As the defective weft yarns are separated from the fabric front, the defective weft yarns sequentially move into the jetting area of the downstream weft insertion auxiliary nozzle, and the separation action of the defective weft yarns is transferred to the jetting action of the downstream weft insertion auxiliary nozzle. Uke is passed down from generation to generation. The defective weft yarns separated from the fabric front into the warp opening are removed from the warp opening by appropriate means.

If the following weft is not connected to the defective weft, the end of the defective weft on the side of the main nozzle for weft insertion is placed from the fabric front into the injection area of the auxiliary nozzle for weft insertion by the mechanical gripping action, and as described above. The defective weft yarns on the fabric front are separated into the warp shed by a similar jet action of the auxiliary weft insertion nozzle.

(Example) Hereinafter, an example embodying the present invention will be described based on FIGS. 1 to 3.

As shown in FIG. 1, a main nozzle 2 for inserting the weft is attached to one end of the sley 1, and the weft is supplied from the thread winding tube 5 onto the drum 4 that forms the thread winding surface 4a of the weft length measuring and storage device 3. The weft yarn Y whose length has been wound and stored is guided into the main weft insertion nozzle 2, and is inserted from the weft insertion main nozzle 2 into the weft insertion path 6a of the modified reed 6 installed upright on the sleigh 1. The injection weft is inserted in synchronization with the timing.

The thread wrapping tube 5 is attached to a rotating support tube 7 that holds the drum 4 stationary so that it can rotate relatively, and the weft yarn Y introduced into the rotating support tube 7 from a cheese (not shown) is guided to the thread wrapping tube 5. . The rotation support tube 7 is rotated by a motor 8 that is separate from the machine drive motor (not shown), and the motor 8 is operated by a machine control computer (not shown).
Controlled by instructions from.

A phototube 9 and an electromagnetic solenoid 10 are installed near the thread winding surface 4a.
The phototube 9 sends a signal corresponding to the amount of light reflected from the thread winding surface 4a to the machine control computer, and the machine control computer controls the operation of the motor 8 in accordance with this signal, The motor 8
rotation is controlled. Further, the electromagnetic solenoid 10 is subjected to excitation/demagnetization control by the machine control computer, and this excitation/demagnetization causes the weft locking body 10a to intersect with and separate from the thread winding surface 4a. A weft detector 11 for detecting unwinding of the winding yarn is installed at an axially symmetrical position with the weft locking body 10a.
The weft unwinding detection signal from the machine is sent to the machine control computer. The machine control computer demagnetizes the electromagnetic solenoid 10 in accordance with the number of detection signals, so that the weft locking body 10a intersects with the yarn winding surface 4a, and weft withdrawal is prevented.

The weft yarn Y, which is injected from the main weft insertion nozzle 2 into the weft insertion path 6a, is passed through 1r1 number of weft insertion auxiliary nozzles 12 which are installed on the front surface of the slay 1 so that the position in the weft insertion direction can be adjusted.
, 12A relay injection. The weft insertion main nozzle 2 is connected to a solenoid valve 23A, and the solenoid valve 23A is branch-connected to a weft insertion injection circuit via a fine injection circuit and an electromagnetic valve 23B. In addition, the auxiliary nozzles 12A and 12 for weft insertion are the main nozzle 2 for weft insertion.
The solenoid valves 13 and 13A are connected from the side to a plurality of solenoid valves 13 and 13A whose opening and closing are controlled by the machine control computer in units of two.

23A and 23B are commanded and controlled by the machine control computer. When the weft Y is inserted normally, the same weft is beaten by the modified reed 6 and woven into the front W1 of the woven fabric W. Then, the beaten weft yarn is cut by the electromagnetically driven weaving weft cutting device 14 of the two main nozzles for weft insertion, and the subsequent weaving operation is continued. If the weft tip does not reach a predetermined position, the weft insertion error detector 15 detects this, and the operation of the loom is stopped based on the weft insertion error detection signal from the weft insertion error detector 15.

After the weft insertion error detection signal is issued, the machine rotates once due to inertia and then stops. That is, the weft insertion error detection signal is generated while the sley 1 moves forward from the most retracted position toward the woven fabric W, and after the erroneous yarn Y'' is beaten into the woven fabric W, the sley 1 further reciprocates and It stops just before the beating position shown by the chain line in Fig. 1.As soon as the weft insertion error detection signal is sent, the weaving weft cutting device 14 is put into an inoperable state by a command from the machine control computer, The mis-woven yarn Y' is maintained connected to the succeeding weft yarn Y1 on the weft insertion main nozzle 2 side.

Main nozzle 2 for weft insertion in the most retracted state of sley 1
A suction pipe 16 is disposed at the rear between the weft inserting main nozzle 2 and the deformable reed 6 so as to be movable back and forth by an air cylinder (not shown), and a guide post is provided between the weft insertion main nozzle 2 and the deformable reed 6. 18 is erected, and a cutter 17 is fixed to the rear side of the tip of the main nozzle 2 for weft insertion.

FIG. 3 is a flowchart showing a defective weft processing program executed based on command control from the machine control computer, and hereinafter, the defective weft processing operation will be explained according to this flowchart.

Due to the occurrence of a weft insertion error, the weaving weft cutting device 14 is deactivated, the electromagnetic solenoid 10 is demagnetized, and the electromagnetic valve 23A is
, 23B, the slay 1 stops at the position shown by the chain line in FIG. As a result, the weft yarn Y1 following the misplaced yarn Y' is not inserted, and the weft yarn Y° is woven into the fabric front W1 in a state connected to the weft insertion main nozzle 2 side.

Following the stop of the machine, the machine is reversed and Sley l retreats to its most retracted position. As a result, the open state of the warp thread group T is formed, and the weaving state of the misplaced yarn Y' by the upper and lower warp thread groups T is released.

Subsequently, by opening the electromagnetic valve 23A, the main weft insertion nozzle 2 communicates with the fine injection circuit, and fine injection is performed from the main weft insertion nozzle 2. At the same time, the electromagnetic solenoid 10 is excited, and the weft locking body 10a is separated from the yarn winding surface 4a. Due to the fine jetting from the main weft insertion nozzle 2 and the release of the locking action of the weft locking body 10a, the wound yarn on the thread winding surface 4a is pulled out and ejected from the main weft insertion nozzle 2 into the warp opening. When this unwinding of the yarn is detected by the weft detector 11, the electromagnetic solenoid 10 is immediately demagnetized and subsequent unwinding of the yarn is prevented. Therefore, the following weft Y1 corresponding to one turn is inserted into the warp shedding, and the following weft Y1 is inserted as shown in FIGS. 1 and 2 (a).
1 is placed and held in a bent state within the injection area of the auxiliary weft insertion nozzle 12A on the side of the main weft insertion nozzle 2 by the fine jet action of the main weft insertion nozzle 2.

After demagnetizing the electromagnetic solenoid 10, the electromagnetic valve 13A.

13 is opened and closed like a relay, and first, by opening the electromagnetic valve 13A on the side of the main weft insertion nozzle 2, fluid is ejected from the auxiliary weft insertion nozzle 12A of the two main weft insertion nozzles. As a result, the bent portion of the trailing weft Y1, which has been placed and held within the injection area of the auxiliary weft insertion nozzle 12A, is subjected to the injection action of the auxiliary weft insertion nozzle 12A, and is pulled in the weft insertion direction. This pulling action acts as a separating force on the misplaced yarn Y' on the fabric front Wl from the fabric front W1 side toward the inside of the warp opening, and this separation direction is This is a direction in which less force is required to separate the fibers from the fabric W1. Therefore, the injection pressure in the weft inserting auxiliary nozzle 12A is sufficient to separate the misplaced yarn Y° from the woven fabric W1, and the misplaced yarn Y" portion on the side of the weft inserting main nozzle 2 is smoothly moved inside the warp opening. Separated quickly.

The erroneous yarn Y' portion separated to the inside of the warp opening by the injection action of the auxiliary weft insertion nozzle 12A is sprayed by the auxiliary weft insertion nozzle 12 following the auxiliary weft insertion nozzle 12A, as shown in FIG. 2(b). The weft inserting auxiliary nozzle 12 receives the jetting action from the weft inserting auxiliary nozzle 12. As a result, the missed yarn Y" on the front W1 is subjected to the same separation action as described above and is separated to the inside of the warp opening. Thereafter, the same separation is performed, and regardless of the size of the weaving width, the missed yarn Y" on the front W1 is separated. All the erroneous yarns Y' are smoothly and quickly separated to the inside of the warp opening without being cut.

After the relay injection of the auxiliary weft insertion nozzles 12A and 12, the suction pipe 16 protrudes from the main weft insertion nozzle 2 into the warp opening near the continuous weft Y1, and is then operated for suction. Due to this suction action, the weft yarns Yl and Y' are sucked and introduced into the suction pipe 16 through the guide post 18. The weft tension caused by this suction action causes the trailing weft Y1 to be cut by the force/twist 17, and a portion of the trailing weft Y1 and all of the missed yarn Y° are discharged to a predetermined location via the suction pipe 16. After this, the suction operation of the suction pipe 16 is stopped, and the suction pipe 16 is retracted to its original position.

Of course, the present invention is not limited to the above-mentioned embodiment, and for example, the auxiliary nozzles 12A and 12 for weft insertion may be configured to eject at the same time, or in the above-mentioned embodiment, the injection port of the main nozzle 2 for weft insertion and the nozzle for weft insertion may be By appropriately setting the positional relationship between the auxiliary nozzle 12A and the injection port, even if the main nozzle 2 for weft insertion is moved back to the most retracted position, the error yarn Y° can be removed.
can be moved and placed within the spray area of the auxiliary weft insertion nozzle 12A. Further, as a method of moving and arranging the weft yarn into the injection area of the auxiliary weft insertion nozzle, it is also possible to blow the weft yarn into the suction pipe by jetting fluid, or to use the embodiment shown in FIG. 4.5. In the embodiment of FIG. 4, the suction pipe 1
A motor 19 is installed on the side of the weft 6 in the weft insertion direction, and a hook 20 is fastened orthogonally to the drive shaft 19a of the motor 19.

The hook 20 is always waiting at the rear where it does not intersect with the weft insertion path, and when a weft insertion error occurs, the motor 19 makes one rotation to hook the incorrect yarn Y° and take it to the rear. It is arranged in the injection area of the auxiliary nozzle 12A.

In the embodiment shown in FIG. 5, it is assumed that the weft selvage W2 is also formed on the weft insertion main nozzle 2 side and that the missed yarn Y° and the following weft Y1 are cut.
The misplaced yarn Y" portion between the two is gripped by the gripper 21 and moved from the fabric front W1 to a position on the side of the suction vibrator 16, and the misplaced yarn Y is held by the gripper 21.

is arranged within the spray area of the auxiliary weft insertion nozzle 12A.

In the embodiment shown in FIG. 6, the suction pipe 16 of the previous embodiments is omitted, and a suction device 22 is installed on the side opposite to the weft insertion, and the cutter 24 cuts the erroneous yarn Y' separated from the woven fabric W1. The liquid is blown into the suction device 22. The means for arranging the misplaced yarn Y'' into the spraying area of the auxiliary weft insertion nozzle 12A may be any of the above-mentioned embodiments (also, the following weft yarn may be connected to or unconnected to the misplaced yarn).

Effects of the Invention As detailed above, in the present invention, the misplaced yarn is placed within the jet action area of the auxiliary nozzle for weft insertion, so that the misplaced yarn on the woven cloth is separated from the woven cloth side to the warp opening side. Receive power,
This provides an excellent effect in that misplaced yarns on the woven fabric can be smoothly and quickly separated from the woven fabric regardless of the size of the woven fabric width.

[Brief explanation of the drawing]

1 to 3 show an embodiment embodying the present invention.
The figure is a perspective view of the main parts, Figure 2 (a) is a plan view of the road body showing the state in which the following weft is placed within the spray action area of the auxiliary weft insertion nozzle after the machine has been reversed, and Figure 2121 (b) is the missed yarn. Road body plan view showing a state in which a part of the
) is a plan view of the road body showing a state in which all the wrong yarns have been separated from the woven fabric, FIG. 3 is a flowchart showing a defective weft processing program, and FIGS. 4 and 5 are perspective views of main parts showing other examples of the present invention. FIG. 6 is a road body plan view showing still another example. Main nozzle for weft insertion 2, auxiliary nozzle for weft insertion 12.1
2Δ, weft insertion error detector 15, error yarn Y゛following weft Yl
, Orimae W1゜

Claims (1)

[Claims] 1 In a shuttleless loom in which the weft inserted from the main nozzle for weft insertion is pulled by a plurality of auxiliary weft insertion nozzles, the warp shedding removes the defective weft weaving state after stopping the machine based on a weft insertion error detection signal. Reverse the machine to the forming position, move the defective weft yarn or the weft thread connected to it on the side of the main nozzle for weft insertion into the injection area of the auxiliary nozzle for weft insertion on the main nozzle for weft insertion, and then A fluid jet is ejected from a nozzle to sequentially separate the defective weft yarns on the woven cloth from the main nozzle side for weft insertion into the warp opening from the side opposite to the weft insertion side, and remove the defective weft yarns separated from the woven cloth from within the warp opening. Method for disposing of defective wefts in shuttle looms.