JPH01306655A - Method for operation control in jet loom provided with weft treating apparatus - Google Patents

Abstract

PURPOSE:To improve operation efficiency and ensure safety of operation, by arranging a device for detecting yarn penetrated into a movable region of movable member of a loom in the treatment of yarn failed in insert of weft, treating the above- mentioned missed yarn and then selecting actuation of the loom on the basis of a detection result concerning existence of penetrated yarn. CONSTITUTION:A computer for controlling a loom orders stopping of operation of machine-driving motor and electromagnetic cutter 7 according to detection signal of weft-inserting miss and simultaneously actuates weft taking-up means constituted of a driving roller 16, moved roller 20, etc., to take the missed yarn Y' from the interior of weft opening and then in weft treatment operation for cutting and separating the weft with a knife 11 from a main nozzle 2, a projection 29 and light-receiver are arranged opposite to the upper part of loom and constituted so as to detect a yarn penetrated into movable region of slay 1 and reed 4. Detection result concerning existence of penetrated yarn is input to the above-mentioned control computer and treatment of the above-mentioned missed yarn Y' is carried out by the computer regardless of the detection result and then starting of the loom is selected on the basis of the detection result concerning existence of the penetrated yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an operation control method in a jet loom equipped with a device for removing abnormally inserted weft yarns woven into a woven fabric.

[Prior art] If 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.

Japanese Utility Model Application Publication No. Sho 62-136591 discloses a weft processing device for removing the erroneous yarns, which become weave defects, from a woven fabric. In this conventional device, when the machine is stopped due to a weft insertion error, the following weft yarn is removed from the cutting action area of the weaving weft cutting 1tIlr device on the weft insertion main nozzle side, and the weft yarn following the error yarn is not ejected. The weft thread handling device grips the trailing weft thread and pulls out the side hemis thread from within the warp opening. Since a part of the weft processing device is placed within the swinging area of the reed, a collision prevention detector is attached to the part that enters this swinging area, and this collision prevention detector detects a collision between the reed and the reed below a predetermined level. When the separation distance is detected, the advancing movement of the weft processing device is stopped.

[Problems to be Solved by the Invention] However, although contact between the reed and the weft processing device is avoided by installing the detector as described above, contact between the reed and the weft processing device is avoided; It is not possible to avoid the danger of restarting the operation of the loom while the machine is inside the moving area. Moreover, it is not possible to automatically restart the weft processing operation of the weft processing device after the weft processing operation of the weft processing device is stopped based on the detection of an abnormality by the collision prevention detector, resulting in an undeniable decrease in work efficiency.

Japanese Unexamined Patent Publication No. 62-243854 discloses an operation control method that selects whether or not to start a loom based on the presence or absence of a weft processing device within a movable region of a movable member on the loom main body side. Since the device is installed above the front of the woven fabric, safety cannot be ensured even if the operator's hand enters the processing operation area above the front of the weft processing device.

The present invention targets a weft processing device having a processing operation area only outside the movable area of a movable member on the loom main body side, as disclosed in Japanese Patent Application Laid-Open No. 61-245339, and restarts the machine after weft processing operation. The object of the present invention is to provide an operation control method that can ensure safety during operation.

[Means for Solving the Problems] For this purpose, in the present invention, the cutting action of the weaving weft cutting device, which cuts and separates the normally inserted weft from the weft inserting main nozzle every time the weft is beaten, is changed to a weft cutting prevention means that is disabled when the machine is stopped; a weft pulling means that pulls the abnormally inserted weft from inside the warp opening to the side using the weft following the abnormally inserted weft as a cue; a weft removal cutting device that cuts and separates the weft yarns from the weft insertion main nozzle; This method detects the presence or absence of an intruder in the movable area of a movable member such as a slay and a weaving member thereon, and performs a weft processing operation of a weft processing device regardless of the detection result of the presence or absence of an intrusion. At the same time, the activation of the machine after the weft processing operation is selected based on the detection result of presence or absence of intrusion.

[Operation] Even if there is an intruder within the movable region, the weft processing operation of the weft processing device is performed outside the movable region. Therefore, if it is confirmed that there is no intruder in the movable area after performing the weft processing operation, the machine automatically performs the operation, reliably avoiding contact between the movable member and the intruder, and efficiently performing the weft processing operation. Well executed.

[Example 1] Hereinafter, an example embodying the present invention will be described based on the drawings.

As shown in FIG. 1, a weft insertion main nozzle 2 attached to one end of the sley 1 has a winding type weft length measuring and storage device 3.
The weft yarn Y whose length has been measured and stored is supplied and is ejected from the weft insertion main nozzle 2 into the weft insertion path 4a of the modified reed 4 set upright on the sleigh 1 in synchronization with the weft insertion timing. The weft thread is pulled out from the drum 5 on which the weft thread Y is wound.
M It is controlled by the intersection and separation of the weft thread stopper 6a driven by the magnetic solenoid 6 and the thread winding surface on the drum 5.

When the weft yarn Y ejected from the main weft insertion nozzle 2 is inserted normally and reaches the end of the woven fabric W on the side opposite to the main nozzle, the weft yarn is beaten by the deformed reed 4 and becomes the woven fabric W. It is woven into Orimae W1. Then, the beaten weft yarn is cut by an electromagnetic cutter 7 serving as a weaving weft yarn cutting device on the side of the weft insertion main nozzle 2, and the subsequent weaving operation is performed mVF.

If a weft insertion error occurs such as the weft not reaching the end opposite to the main nozzle, the tweeter 8 located corresponding to the same end detects the weft insertion error and outputs a weft insertion error detection signal from the tweeter 8. Loom control computer based on C
commands the machine drive motor M to stop operating. 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 reed beating position shown by the chain line in Figure 1.

When the weft insertion error detection signal is transmitted, the electromagnetic cutter 7 is placed in an inactive state, and the error yarn Y° woven into the front W1 of the woven fabric W is maintained connected to the weft insertion main nozzle 2 side. Note that the weft yarn may be prevented from being cut by moving the weft yarn out of the action area of the weft yarn cutting device by other suitable means.

A blow nozzle 9 connected to a pressure air supply source (not shown) is installed directly below the main nozzle 2 for weft insertion, and its injection port 9a is set to face the injection path of the main nozzle 2 for weft insertion. There is. Main nozzle 2 for weft insertion
A weft introduction duct 10 is installed directly above, and its introduction port 10a is set at a position opposite to the injection port 9a of the blow nozzle 9 across the injection path of the main nozzle 2 for weft insertion. A blade 11 is interposed between the weft insertion main nozzle 10a and the injection port of the weft insertion main nozzle 2. An air guide 12 is located behind the outlet 10b of the weft introduction duct 10.
and a suction pipe 13 are installed so as to be able to swing together with the sley 1, and the entrance and exit of the air guide 12 and the suction pipe 13
The population is set on the discharge route of the exit 10b of the weft introduction duct 10. The outlet side of the suction pipe 13 is Slay 1
The nozzle 14 connected to the pressure air supply source is connected to this curved part so as to face the outlet of the suction pipe 13. ing.

A stepping motor 15 is installed on the loom stand side behind the swinging area of the slay 1, and a driving roller 16 is installed directly above the stepping motor 15.
The driving pulley 15a and the driven pulley 16b on the support shaft 16a of the driving roller 16 are operatively connected by a timing belt 17. An air cylinder 18 is disposed facing downward directly above the driving roller 16, and a driven roller 2 is mounted on a support frame 19 fixed to the tip of the driving rod 18a.
It is rotatably supported facing the 0-force 1 section driving roller 16, and the driving roller 1 is rotated by the protruding operation of the air cylinder 18.
6 can be pressed. A support base frame 22 is rotatably supported by a support shaft 21 protruding from the side surface of the air cylinder 18, and a support base frame 22 is provided in a guide hole 22a formed on the lower side of the support shaft 21 and protruding from the support frame 19. A weft detecting device 23 having a detecting arm 23a is attached to the support base frame 22.

The driving roller 16 and the driven roller 20 are set at positions facing each other across the weft introduction duct 10 and the air guide 12 when the slay 1 is retracted the most, and the detection arm 2
The tip of the slay 3a is set at a position where it can sweep across the space between the air guide 12 and the suction pipe 13 when the slay 1 is in its last retreat.

In this embodiment, an intruder detection device consisting of a light emitter 29 and a light receiver 30 is installed above the cloth front W1,
The presence or absence of an object intruding into the movable area of the slay 1 and the deformed flow 4 above the loom W1 is detected, and this detection signal is sent to the loom control computer C.

When a weft insertion error occurs, the loom control computer C executes the weft processing program shown in the flowchart of FIG. When a weft insertion error occurs, the loom control computer C instructs the machine drive motor M and the electromagnetic cutter 7 to stop operating in response to the weft insertion error detection signal, and also instructs the electromagnetic valve 24 connected to the nozzle 14 and the blower to stop operating. A command is given to open the electromagnetic valve 25 connected to the nozzle 9. As a result, pressurized air is supplied to the blow nozzle 9 and the nozzle 14, and an air flow that crosses the weft insertion path is generated between the blow nozzle 9 and the weft introduction duct 10.
A suction air flow is generated on the inlet side of the These air flows are generated after the electromagnetic cutter 7 is inactive and until the slay 1 stops at the position indicated by the chain line in FIG. As a result, the missed yarn Y° is woven into the fabric front W1 in a state connected to the main nozzle 2 for weft insertion, and the weft yarn Y1 following the missed yarn Y'' is woven into the fabric by the air flow jetted from the blow nozzle 9 during machine inertia operation. The weft yarn is pulled out from the weft length measuring and storage device 3 and forcibly introduced into the introduction port 10a of the weft introduction duct 10.

The following weft Y1 has a predetermined length or more, and the weft introduction duct 1
If the following weft Y1 is smoothly introduced into the exit 10b,
The air reaches the inside of the suction pipe 13 via the air guide 12 and the air guide 12, and is blown toward the dust box by the jet action of the nozzle 14. As a result, the weft yarn 1 between the weft yarn introduction duct 10 and the suction pipe 13 is given an appropriate tension and becomes taut.

Following the stop of the loom, the loom control computer C commands a predetermined amount of reverse rotation of the loom based on the detection signal from the row reencoder 31 for detecting the rotation angle of the loom, and the slay 1 retreats to the most retracted position. . As a result, the open state of the warp threads T is formed, and the weaving state of the misplaced thread Y' by the upper and lower warp threads T is released.

At the same time, the trailing weft Y1 between the weft-enabled duct 10 and the air guide 12 is placed into the pressure gripping area between the drive roller 16 and the driven roller 20, and the air guide 12 and the suction pipe 13 are The subsequent weft Y1 between the two is placed within the rotational sweeping area of the detection arm 23a. Then, the loom control computer C commands the opening of the electromagnetic valve 26 connected to the air cylinder 18, and the driven roller 20 comes into pressure contact with the driving roller 16 as shown in FIG.

As the driven roller 20 moves downward, the support base frame 22 is moved to the support shaft 21 by the engagement between the guide pin 19a and the guide hole 22a.
The detection arm 23a rotates and sweeps across the space between the air guide 12 and the suction pipe 13. At this time, the following weft Y1 is connected to the roller pair 16.20 and the suction pipe 1.
3, the detection arm 23a moves together with the main body of the weft detection device 23, and the weft detection device 23 does not emit a detection signal indicating the presence of a weft. As a result, the loom control computer C recognizes the weft processing abnormality and instructs the warning lamp 27 to blink, as well as the electromagnetic valves 24, 25 .
26 is commanded to close, the air flow stops, and the air cylinder 18 returns to the retracted position shown in FIG.

When the trailing weft Y1 is present between the roller pair 16.20 and the suction pipe 13, the detection arm 23a rotates relative to the main body of the weft detection device 23 due to the tension of the trailing weft Y1, and detects the weft. The device 23 issues an ON signal indicating that a weft is present. The loom side? In response to this detection signal, the fftl computer C instructs the stepping motor 15 to rotate by a predetermined amount, and the drive roller 16 and driven roller 20 rotate while gripping the weft ¥1. Both rollers 16, 2
0 rotation, the weft Y1 is pulled toward the suction vibrator 13, and this pulling tension causes the weft Y1 to be pulled toward the blade 11.
As a result, the weft yarn is cut and separated from the weft inserting main nozzle 2, and the misplaced yarn Y' on the weft front Wl is separated from the weft front W1. Then, the tip of the miss thread Y" is at the roller pair 16.20
When passing through, the detection arm 23a moves to the OF2 position with respect to the main body of the weft yarn detection device 23, and the miss yarn Y' is discharged to the dust box.

In response to this OFF signal, the V& machine control computer C calculates the amount of pull-out of the erroneous thread Y' based on the amount of rotation of the stepping motor 15, and compares it with a preset amount of pull-out. If the actual amount of withdrawal does not reach the set amount of withdrawal, it is determined that removal of the wrong yarn has failed, and the warning lamp 28 is instructed to flash and the electromagnetic valves 24, 25, and 26 are instructed to close. When the actual amount of withdrawal reaches the set amount of withdrawal, it is determined that the mis-thread removal has been successful, and the electromagnetic valve 24.
25. Commands only the closure of 26.

After the air flow disappears and the air cylinder 18 returns, the loom control computer C selects whether or not to operate the loom drive motor M based on the intrusion detection signal from the intruder detection devices 29 and 30. For example, when a worker's hand intrudes into the movable area of the slay 1 and the modified reed 4, an intrusion detection signal is sent to the loom control computer C. Based on this intrusion detection signal, the loom control computer C maintains the loom drive motor M in an inoperative state and prohibits restarting of the loom. Therefore, the Slay 1 and the deformable layer 4 will not shift to a high-speed swinging state even if the worker's hand or the like enters the movable area of the Slay 1 and the deformable layer 4, and the safety of the worker is ensured. .

When the operator's hand moves out of the movable area of the slay 1 and the deformable layer 4, the intrusion detection signal disappears. Therefore, the loom control computer C instructs the loom drive motor M to reverse rotation by a predetermined amount, and the loom rotates by a predetermined amount and stops at a rotational position suitable for restarting the loom. Next, the loom control computer C instructs the loom drive motor M to rotate in the normal direction, and the loom begins normal operation.

The operation of the loom is restarted after checking whether there is an intruder in the movable area of the slay 1 and the deformable layer 4, but the weft processing operation of the weft processing device is performed regardless of the detection result of the presence or absence of an intruder. be exposed. This has been made possible by setting the weft processing operation area of the weft processing device outside the movable area of the slay 1 and the deformable layer 4. This improves the work efficiency of weft processing while ensuring worker safety. can get. Furthermore, if the weft processing is successful, there is no intruder within the movable area of the slay 1 and the deformable layer 4 (if this is the case, the loom will be restarted automatically, and the operating efficiency of the loom will be further improved).

Of course, the present invention is not limited to the above embodiments, and for example, a plurality of intruder detection devices may be installed. or,
The detection device may be installed in movable members of various parts of the loom, such as the heald frame, the warp delivery section, or the fabric winding section. Furthermore, the present invention also applies when the weft processing operation area of a winding type weft processing device as disclosed in Japanese Utility Model Application Publication No. 62-136591 is set only outside the movable area of the slay and the weaving members thereon. Application of the invention is possible.

[Effects of the Invention] As detailed above, the present invention allows the weft processing device to carry out the weft processing operation outside the movable region of the movable member such as the slay, regardless of the result of detecting the presence or absence of an intruder within the movable region, and Since the execution of starting the machine after the weft processing operation is selected based on the detection result of the presence or absence of intrusion, it is possible to improve the work efficiency of weft thread processing and ensure the safety of the worker when restarting the machine. It has this excellent effect.

[Brief explanation of the drawing]

The drawings show an embodiment embodying the present invention; Fig. 1 is a plan view of the road near the slay, Fig. 2 is a perspective view of the main part during inertia operation of the machine, and Fig. 3 is a weft gripping by a pair of rollers. FIG. 4 is a perspective view of main parts showing the state, and a flowchart showing a weft processing program. A blow nozzle 9 and a weft introduction duct 10 constitute a weft processing device, and a drive roller 1 constitutes a weft take-off/means.
6 and driven roller 20, a light emitter 29 and a light receiver 30 for detecting intruding objects. Loom control computer C0

Claims (1)

[Claims] 1. A weft cutting prevention means for disabling the cutting action of a weaving weft cutting device which cuts and separates a normally inserted weft from a weft inserting main nozzle every time the weft is beaten, when the machine is stopped in the event of an abnormal weft insertion; A weft take-off means for pulling off the weft with abnormal weft insertion from inside the warp opening to the side using the weft following the weft with abnormal insertion as a cue, and a weft removal for cutting and separating the weft taken by the weft take-off means from the main nozzle for weft insertion. In a shuttleless loom equipped with a weft processing device, the weft processing operation area of the weft processing device is set outside the movable area of the movable member such as the sley and the weaving member thereon, The presence or absence of an intruder within the movable area of the movable member of the loom is detected, and the weft processing operation of the weft processing device is performed regardless of the detection result of the presence or absence of intrusion, and the loom after the weft processing operation is performed based on the detection result of the presence or absence of intrusion. A method for controlling operation in a jet loom equipped with a weft processing device that selects execution of start-up.