JPS6075647A - Weft yarn treatment in fluid jet type loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention Technical Field The present invention relates to a fluid injection type loom in which the weft supplied from a weft supply section is ejected from a storage nozzle in the direction of a storage pipe while being sub-lengthened by a length measuring machine. (This relates to a weft processing method.

BACKGROUND OF THE INVENTION In recent years, there has been a marked trend toward higher speed weaving machines for the purpose of improving the productivity of weaving machines, and there is a tendency for fluid injection type weaving machines that meet this purpose to be widely used. In this fluid injection type loom, it is necessary to measure the weft to be inserted into a predetermined length and store it in advance, and as a length measurement method, the length of the weft fed from the weft supply section is measured by a sub-length roller mechanism. There is a length measuring device that ejects and stores water from a storage nozzle in the direction of the storage pipe. The length of the weft yarn supplied from the weft supply section is continuously measured by a length measuring mechanism, and a predetermined amount is ejected and stored in the direction of the storage pipe. A predetermined amount of the stored weft yarn is ejected from the main nozzle and inserted into the weft in synchronization with the weaving timing.

The fluid injected from the main nozzle is controlled by the opening/closing operation of a valve, and this valve is a mechanical valve or an electromagnetic valve.

However, when the loom is stopped for some reason, for example, based on a weft insertion error detection signal (which is also a loom stop signal), the loom 1 is The platform will stop after it has rotated more than once. Therefore, if a mechanical valve that opens and closes in synchronization with the rotation of the machine is used as the valve, the weft thread following the weft thread that has been inserted incorrectly (hereinafter referred to as "miss thread") will also be tightened. Therefore, in order to prevent the weft yarn following the missed yarn from being inserted, a suction pipe with a shielding plate is protruded from the weft path in front of the main nozzle. A pair of inward suction means is shown.

However, when the injection of fluid from the main nozzle is controlled by a mechanical valve, the injection pressure is as strong as during normal operation of the loom, so the injection fluid is disturbed by the shielding plate. , there is a risk that the weft yarn may not be suctioned into the suction pipe smoothly.

In order to eliminate this defect, a regulating valve that is activated when the machine is stopped is placed in the fluid supply path, and when the machine is stopped, a part of the injected fluid is discharged from the regulating valve to prevent the main nozzle from flowing. Although means for avoiding a drop in the fluid jet 1-[ can be considered, it has been difficult to avoid sufficiently lowering the fluid jet 1-[ and to reliably suction-guide the weft yarn into the suction pipe. Alternatively, an electromagnetic valve is interposed between the fluid supply source and the mechanical valve, and the valve is opened based on the weft insertion error detection signal, so that the fluid in the fluid supply path from the electromagnetic solenoid to the mechanical valve is There is also a method for injecting the weft yarn using the residual pressure of the weft, but the same problem exists in that the injection pressure is too strong and the weft yarn cannot be reliably sucked into the suction pipe.

In order to eliminate the defects associated with the use of the mechanical valve, it is conceivable to use an electromagnetic valve instead of the mechanical valve. According to this method, the electromagnetic valve can be immediately opened based on the machine stop signal independently of the single-member operation of the machine.

However, if the electromagnetic valve is opened immediately based on the machine stop signal, the weft yarn cannot be taken out from the main nozzle, and the same weft yarn cannot be sucked into the suction pipe. Therefore, as shown in Figure 1,
When the machine stop signal is sent, the machine enters t(1) operation, and based on the same signal, the solenoid valve is opened (fluid injection starts at 1).
No matter how many units are stopped after T when the stop signal F is issued, the length of the weft yarn is measured by the length measuring roller mechanism and ejected toward the storage pipe. As a result, when the loom resumes operation, the cotton yarn inserted into the weft becomes too long, and there is a risk that the same weft yarn will be woven into the woven fabric in a tangled state. (There is a cotton insertion error detector located further outside the opposite end of the weft insertion side of the weave b. (This detector detects when the inserted yarn is cut before the weft insertion...r L-
c゛L, machine iro's opposite 1r - 1, IJ UI kasuri weft detection device) is installed -C
In some cases, the tip of the weft that is too long may be detected by the same detector, and the loom may be stopped again.

In addition, if the solenoid valve is opened and closed in the same way as during normal operation of the loom during inertial operation of the loom, during this time ■1 operation is time controlled, so during inertial operation of the loom with a low rotation speed, (
At 1 meter, the electromagnetic valve opens and closes faster than usual. Therefore, the number of stored weft yarns increases due to this time lag, and the stability of the wefting process when the loom resumes operation is not maintained.

Purpose The present invention considers the above problems! The purpose is to store the weft at a set φ when the loom is stopped, and to stabilize the weft insertion when the loom resumes operation. The object of the present invention is to provide a method for processing weft threads in a loom.

Structure In order to achieve the above-mentioned object, in the present invention, the length of the weft supplied from the weft supply section is measured by the sub-length roller mechanism, and the weft is ejected from the storage nozzle in the direction of the storage pipe and stored.
3, the small injection flow to the main nozzle is controlled by a solenoid valve, and the opening/closing f1 movement of the solenoid valve during i-negative operation when the machine is stopped is controlled through 1i-4 (-4 when no one is present). Unlike the opening operation that is synchronized with the machine machine, a method was adopted in which the weft was set and stored in /j ff7 when the machine machine was stopped.

Examples The following examples are based on FIGS. (as a length measuring roller mechanism), the r-trollers 2 and 3 measure J (as a length measuring roller mechanism).
) When the gripper 5 for gripping the webbing yarn, which is ejected from the storage nozzle 4 and opened and opened in synchronization with the weft insertion timing of the loom, is closed, the same 1f-system Y moves IIn in the direction of the storage vibro having the slit 6a. Deposited and stored. The weft yarn Y passing through the weft hole 7 and the gripper 5 is fed into the main nozzle 9 on the slay 8 which is reciprocally moved, and the main nozzle 9, which is operated in synchronization with the 1f-insertion timing, passes through the slay 8 in large numbers. Guide hole 10 of detailed weft kite member 10
1 mouth j river stone is placed in a 6. .

The fluid supply from the fluid supply source 20 to the main nozzle 9 is controlled 11 based on the opening/closing operation of the electromagnetic Harz 2'1. The valve 21 receives an operation command from the control device 22 (
-C is opened and closed based on the control [1-Small device 224 normal operation 1], and I is opened and closed based on the detection signal from the machine rotation angle detection device (not shown). When the machine is stopped, an opening/closing operation command different from the above-mentioned opening/closing operation command is issued based on the machine stop signal.

The weft yarn Y ejected from the main nozzle 9 enters the weft normally.
When the fabric W reaches the end of the woven fabric W on the side opposite to weft insertion, the sley 8 passes through the sling h 101) from the guide hole 10a of the weft guide member 10 while moving forward in the direction of the arrow in FIG. -C weft is 11j1 out, and the same weft is reed 1 on slay 8
1 is inserted into the front of the woven fabric W+7), woven into the woven fabric W, and cut by a cutter 12 installed near the edge of the woven fabric W on the nozzle side. Therefore, the subsequent weaving operation is continued.

In this case, if the weft Y does not reach the cloth edge on the opposite weft insertion side, the weft yarn Y installed in the weft kite member I A detector (not shown) detects a weft insertion error, and the machine is stopped based on a weft insertion error detection signal from the detector. 4A10
11 (when the weft is struck, the weft threads are in the same slits 101) and are arranged opposite to each other with the slits 1 to 101] in between.
There is a device C that emits a string insertion error detection signal when it does not pass through Ic.

The above-mentioned weft insertion error detection 1 [After the machine No. 6 (machine (also a 7-fold signal) was issued, the machine was punished almost once,
'C'Rotate'K' 1-1. : =Jru. In other words, if a lI- insertion error occurs, 8111 from the solid line shown in Fig. 3 is the arrow Zj.
While moving forward in the direction, the weft insertion error detection signal is illuminated,
After the missed yarn Y' is beaten by the reed 11 (cut by the cutter 12) ζ, the reed 11 returns to the last (V) position, and then moves forward to the furthest point and stops just before the beating. '
fM As shown in Fig. 6, after the machine stop signal is issued (somewhat into 1/1 operation), during this 1n operation, the suction nozzle 13 installed near the main nozzle 9 1 stop (a Based on 4'3, the reciprocating device 14 such as an air cylinder or an electromagnetic solenoid is activated as shown in FIG. The nozzle 13 is equipped with a shielding plate 15, and the plate 15 is arranged in the forward direction up to the weft path. , during this inertial operation L15, (feed rotated synchronously with some rotation)''-L2゜3
Accordingly, the storage speed of the weft yarn Y (as shown in FIG.
1 is stored (that is, when the gripper 5 is released, as shown by T1 in FIG. 6), an opening operation command is issued to the electromagnetic valve 21, and the same valve 2'1 is opened (
In addition, this temporary operation command is the gripper 5 temporary release 11i'r.
T 1°) Therefore, in Figure 6, P
As shown in the figure, fluid is injected from the main nozzle 9, and the weft yarn Y is ejected from the same nozzle 9. This is a suction nozzle! 3 and MM iM 4&'155 or not shown in FIG. . In Fig. 6, the fluid jetted from the main nozzle 9 (not indicated by P) jets out the stored weft yarn in the storage vibro direction, and the stored weft yarn is completely pulled out.
, 3 is indexed from the main nozzle 9 and sucked into the suction nozzle 1r3. Then, the gripper 5, which is opened and closed in synchronization with the turn of the machine, is shown in FIG. valve 2
A closing operation command is sent to the valve 1, and the valve 21 is closed. Therefore, the weft yarn sent out from the negative rollers 2 and 3 begins to be drawn out and stored in the storage pipe (3Ij direction) as shown in FIG. 5, and this state continues until the four-minute stop at 1-3 in FIG. A3, a cutter (not shown) is installed near the main nozzle 9, and the machine is stopped.
Main nozzle 9 and suction nozzle 1
3. The weft is cut [1/i (J3,
In this case, the specified time between weft cutting 1 and restarting +1
It is also possible to do it on 11th). Then, the suction nozzle 13) and the shielding plate 15 (with the stop of the bottom table, the suction operation thereof is stopped, and return to the retracted position).
) Rir.

In this way, when the loom is stopped, the accumulated weft m (indicated by 1- in Fig. 6) is stored in l) when the loom is restarted. The weft insertion length was set to be approximately the same as the weft insertion length during normal operation (11).
The control device i22 sends an operation command to the electromagnetic valve 21 according to a preset program so that the weft storage value becomes the set value [-] when the machine is stopped. During the normal operation, the main nozzle 9 injects fluid Q=1 as indicated by P in FIG.

After the machine stops, the feed 1 collages 2 and 3 are separated by an air cylinder or solenoid (not shown), and the length measurement function is canceled. In this state, the machine is reversed once and a half, and the Ffl , 11 are shown in solid lines in FIG. 3 and are stopped at the most retracted position. During this reversal, the gripper 5 is opened, but since the electromagnetic valve 21 is in the open state, the weft yarn is not ejected from the main nozzle 9 in the weaving direction. In this state d3, the erroneous yarn Y' is separated from the woven fabric W.

After handling this mis-thread, the machine is reversed by a predetermined amount and stopped at the rotation position most suitable for restarting. During this reversal of the loom, the feed [J-ra 2 is also reversed, but as mentioned above, the feed rollers 2 and 3 are retracted and the length measurement function is canceled, so the stored weft is There is no risk of it being pulled back to the yarn supply section 1 side.

d111 length (J-shi machine (111 length measurement function restored/j
After that, the loom is operated 1■] (1 repo, machine 1 Iku resumes operation, J>L-Jru's first special insertion is the usual poetry case 1
1. The weft is inserted at the same length as the weft inserting section of iJ3 in 1.1. Accordingly, the injection fluid supply to the main nozzle was controlled by an electromagnetic valve on the loom (15), and the weft inserted for the first time after restarting the loom was too long and in a plowed state. It is woven into the weave I ■, or it is woven into the weave I
Conventional problems such as malfunctions in detecting weft insertion errors when the weft detector is installed further outside the opposite weft insertion side A11 end of the weft insertion side have been solved, and the loom can resume operation smoothly. The quality of the fabric is maintained.

In addition, although the above-mentioned embodiment C refers to the stoppage and restart of the machine due to a mis-welding mistake, of course, the above-mentioned fluid injection control can also be applied in the case of machine stoppage and restart due to other reasons. will be carried out.

It should be noted that the present invention is not limited to the above-mentioned embodiments. For example, during inertial operation of the machine, the fluid jet from the main nozzle 9 is avoided from being related to the suction operation of the suction nozzle 13, and the fluid ejection from the main nozzle 9 is Suction nozzle 1 is used for jetting the flow f.
6J, the excess weft sent out from the feed rollers 2 and 3 is pulled out by the suction action of the suction nozzle 13.

In this case, the fluid injection time from the main nozzle 9 is much shorter than in the previous embodiment.

Effects As detailed above, the fluid+rl injection machine of the present invention has J
:i l:J's weft processing method is capable of smooth weft insertion by preventing defective weft insertion that occurs when the loom resumes operation when the injection fluid supply to the main nozzle is controlled by an electromagnetic valve. If a machine with stable quality can be obtained, it will have excellent effects.

[Brief explanation of the drawing]

Figure 1 shows a conventional fluid injection type loom in which the injection fluid supply to the main nozzle is controlled by electromagnetic pulp.
A graph showing the weft storage using lti (: during operation) of the stand, Figures 2 and 6 show an embodiment embodying the present invention, and Figure 2 shows the length measuring device and weft insertion. Schematic diagram showing the vicinity of the device fJ, Figure 3 [Same side view, li/I
The diagram is! Fig. 5 shows the change from Fig. 4, and Fig. 5 shows the change from Fig. 4.
! + fl ('I- This graph shows the pressure change of the 0.1 fluid from the Ij + J main nozzle and the change in the weft storage amount during operation. Weft supply section 1, length measurement - La ( How many 4M feed 1
-)-Ra 2, 3, storage vibro, main nozzle 9, electromagnetic pulp 21, milliherol device 22, weft Y.

Claims (1)

[Claims] 1. The weft supplied from the weft supply section is fed to the length measuring roller 1li.
In a loom that ejects and stores the weft yarn in the direction of the storage pipe while measuring the length according to f, the supply of ejection fluid to the main nozzle for ejecting and inserting the ejected and stored weft yarn is controlled by an electromagnetic valve, and the machine The opening and closing operation of the electromagnetic valve during stop + operation is performed during normal twilling. A weft processing method in a fluid jet loom, characterized by: