JP2643145B2 - Weft processing method for shuttleless loom - Google Patents

Description

Description: Object of the Invention (Industrial Application Field) The present invention relates to a method for treating a weft inserted just before a machine stop in a shuttleless loom such as a jet loom, a rapier loom or a gripper loom. It is.

(Prior art) When a weft insertion error occurs in a shuttleless loom such as a jet loom, the machine stop is performed based on a weft insertion error detection signal from a weft detector, but in a high-speed loom such as a shuttleless loom. In order to prevent damage to each part, the machine is stopped after one or more rotations of the machine, and the machine is stopped. Therefore, the wefts with incorrect weft insertion (hereinafter referred to as "mis-threads") are beaten immediately before the machine stops and are woven into the fabric. Weaved.

Japanese Patent Application Laid-Open No. Sho 62-62965 discloses a weft processing device for removing the miss yarn from the woven fabric, which becomes a weaving defect of the woven fabric. In this conventional device, a suction device for pulling out the miss yarn is installed on the anti-weft insertion side. However, if a weft break occurs during the withdrawal, it is necessary to provide an alarm means as disclosed in, for example, JP-A-61-245339. In this conventional apparatus, when the machine is stopped due to a weft insertion error, the subsequent weft insertion is prevented, and the weft cutting cutter on the main nozzle for weft insertion is set in an inoperative state, and the weaving of the woven fabric is stopped. Miss yarns that have been woven before are drawn out to the side from the main nozzle for weft insertion with the wefts connected to the woven fabric as clues and removed. If the weft processing time is completed faster than usual, it is considered that the miss yarn has been cut during the drawing, and a warning measure such as lighting of a pilot lamp or the like is taken.

(Problems to be Solved by the Invention) However, the causes that cannot be processed by the weft processing device include a weft supply error other than the cutting of the weft during the withdrawal,
There is a weft entanglement in the warp, and in the event of a weft insertion error or weft supply error that leads to such a weft processing error, it is necessary for the operator to understand the error situation. It takes a long time and hinders the advantage of high productivity of a shuttleless loom that operates at high speed.

Configuration of the invention (Means for solving the problems) Therefore, in the present invention, the presence or absence of a weft inserted just before the machine stoppage is checked before the weft withdrawal operation of the weft processing device,
In the case of a detection result of the presence of a weft, the weft processing device is operated to perform a weft pull-out operation, and the length of the drawn-out weft, the weft pull-out time, and the like are measured. Based on a comparison between the time and the measurement result, the quality of the weft withdrawal processing result and the state of withdrawal are grasped, and at least the grasped result and the cause of the processing error determined from the no weft result in the confirmation of the presence or absence of the weft are individually displayed. I did it.

In the specific invention described above, the integrated value of the number of display times of the cause of the processing error may be individually displayed.

(Operation) First, the presence or absence of a weft is confirmed prior to the weft processing operation by the weft processing device, and when there is a weft, the weft is drawn out from the weft opening by the weft processing device. If the pulling is performed normally, the weft length measured by a suitable length measuring means falls within a preset range, whereby it is determined that the weft pulling process has been successful, and Start is selected. When the weft breaks during the weft insertion or withdrawal, the measured amount falls outside the set range, and when the weft is entangled with the warp, the measurement time exceeds the set time. If the detection result of the presence or absence of the weft, which is performed prior to the weft processing operation of the weft processing device, is determined to be the absence of the weft, it is determined that a weft supply error has occurred, and the operation of the weft processing device is not performed. Based on the quality of these weft withdrawal processing results and the grasp of the state of withdrawal, at least these grasped results and the cause of processing errors determined from the absence of a weft in the confirmation of the presence or absence of a weft are individually displayed, and cannot be dealt with by the weft processing device. The processing efficiency of the worker who processes the mistake is improved.

In the invention in which the integrated value of the number of times of display of the cause of the processing error is individually displayed, it is possible to grasp the tendency of occurrence of each cause of the mistake, and based on this grasp of the tendency, the increase in the occurrence of weft insertion errors that can be dealt with by the weft processing device. It is possible to perform the adjustment that can suppress the frequency of occurrence of these error causes while allowing the error.

(Embodiment) An embodiment in which the present invention is embodied in a jet loom will be described below with reference to the drawings.

As shown in FIG. 1, a weft insertion main nozzle 2 is mounted on one end side of the slay 1 and is supplied from a yarn winding tube 5 onto a drum 4 forming a yarn winding surface of a weft length measuring and storing device 3. The weft Y stored and wound is stored in the main nozzle 2 for weft insertion, and is inserted from the main nozzle 2 for weft insertion into the weft guide passage 6a of the deformed reed 6 erected on the slab 1. The injection weft is inserted in synchronization with. Fluid supply to the weft insertion main nozzle 2 is controlled by opening and closing the electromagnetic valve 7, and the opening and closing of the valve 7 is performed in synchronization with the machine base.

The yarn winding tube 5 is attached to a rotation support tube 8 that holds the drum 4 stationary so as to be relatively rotatable, and the weft Y introduced into the rotation support tube 8 from a not-shown weft cheese is wound around the yarn winding tube 5.
Has been guided to. The pulling out of the weft from the drum 4 is controlled by the intersection and separation of a weft locking body 10 fixed to the tip of a cam lever 9 supported to be swingable and the yarn winding surface on the drum 4, and the swing of the cam lever 9 is controlled. The movement is performed by the action of a cam (not shown) on a drive shaft (not shown) which is driven to rotate in synchronization with the machine base. The rotation of the drive shaft is transmitted to the rotation support tube 8 via the timing pulley 11, the timing belt 12, and the timing pulley 13, and the yarn winding tube 5 is
Around the periphery of the drum 4, the weft yarn Y is supplied onto the drum 4 from the yarn winding tube 5.

An electromagnetic solenoid 14 is provided near the upper end of the cam lever 9.
The driving rod 14a is connected to the cam lever 9
It is arranged toward. In the protruding state of the drive rod 14a, the tip of the rod 14a comes into contact with and pushes the tip of the cam lever 9, so that the weft locking body 10 can be held in a state of intersecting with the thread winding surface. . That is, the weft length storage device 3 and the electromagnetic solenoid 14 constitute a weft insertion preventing device.

When the weft Y ejected from the weft insertion main nozzle 2 is normally inserted and reaches the end of the woven fabric W on the side opposite to the main nozzle, the weft is beaten by the deformed reed 6 and the woven fabric is woven. W weave. Then, the beaten weft is cut by the weft cutting device 15 on the side of the main nozzle 2 for weft insertion, and the subsequent weaving operation is continued.

If a weft insertion error occurs such that the weft does not reach the end on the side opposite to the main nozzle, the feeler F corresponding to the end detects the weft insertion error and detects the weft insertion error from the feeler F. Machine drive motor M based on signal
Operation is stopped.

After the weft insertion error detection signal (which is also a machine stop signal) is issued, the machine rotates about one time by inertia and stops. That is, when a weft insertion error occurs, a weft insertion error detection signal is issued while the slay 1 advances from the last retreat position shown by the solid line in FIG.
After being beaten by the woven fabric W, the slay 1 further reciprocates and stops just before the beating position indicated by the chain line in FIG. As shown in FIG. 2, the weft cutting device 15 comprises a fixed blade 17 and a movable blade 18 mounted on a support shaft 16, and a cam lever 20 and a movable blade 18 which are swung by a cam 19 which rotates in synchronization with the machine base. Are operatively connected via a link 21 and perform a weft cutting operation every time weft is inserted. An electromagnetic solenoid 22 is disposed near the cam lever 20, and its drive rod 22a contacts the cam lever 20, so that the weft cutting device 15 can be maintained in an open state. The electromagnetic solenoid 22 is operated based on the weft insertion detection signal, and prevents the weft cutting device 15 from cutting the miss yarn Y '.

A weft pulling-out device 23 is disposed in the vicinity of the rearmost position of the weft insertion main nozzle 2, and the weft Y1 following the miss yarn Y 'during the machine inertia operation is moved by the weft insertion main nozzle 2.
Is cut off by a cutter 24 installed in the apparatus and suction-removed. The cutter 24 is driven by an electromagnetic solenoid (not shown).

A description will be given of the weft pulling device 23. A first suction pipe 26 is connected to a suction device 25 which is operated based on a weft insertion error detection signal, and a second suction pipe disposed subsequent to the suction pipe 26. 27 is connected to the suction device 25. In the first suction pipe 26, a light emitting element 45 and a light receiving element
A weft detector consisting of 46 pipes is installed.
It is possible to detect the presence or absence of the weft in the inside. A blow pipe 42 is installed opposite the first pipe 26 across the weft insertion path in front of the weft insertion main nozzle 2 at the rearmost position of the slay 1, and is connected to a blow device 43.

A motor 28 is provided below the two suction pipes 26, 27, and a drive roller 29 fixed to a drive shaft of the coater 28 is disposed between the two suction pipes 26, 27 and close to the suction pipe 27. ing. A length measuring roller 30 is rotatably arranged on the suction pipe 26 side between the two suction pipes 26 and 27, and an arm 31 is provided at an upper end of a roller shaft 30a of the length measuring roller 30.
Are fixed in an orthogonal state, and a magnetic body 32 is fixed to the upper surface of the distal end of the arm 31. And the magnetic body 32
A magnetic displacement detector 33 is provided immediately above the rotation locus of the magnetic head.

An air cylinder 34 is disposed on the side between the two suction pipes 26, 27. A support plate 35 is slidably supported by the drive rod 34a of the air cylinder 34, and is urged by a pressing spring 36 in the direction in which the drive rod 34a projects.
On one side of the front surface of the support plate 35, a driven roller 37 is provided with a driving roller 29.
The air cylinder 34
The drive rod 34a can be joined to the drive roller 29 by the protrusion. A support shaft 38 is slidably supported on the other side of the support plate 35, and is urged by a pressing spring 39 in the direction in which the drive rod 34a of the air cylinder 34 projects. At the tip of the support shaft 38, a length measuring roller 40 is provided.
The air cylinder is rotatably supported facing 30
The projection of the drive rod 34a of 34 allows the length measurement roller 30 to be joined.

The operation of the electromagnetic valve 7, the weft insertion preventing device, the weft cutting device 15, the weft pulling device 23, the blowing device 43, and the machine driving motor M are controlled based on a command from the control device C shown in FIG. Control device C
Comprises an input / output interface, a CPU (central processing unit), and a memory for storing a weft processing program shown in the flowchart of FIG. 5, a feeler F, a rotary encoder 44, weft detectors 45 and 46, and a magnetic displacement Detector 3
The command is issued based on the signal from (3). Further, the control device C issues a display command to the display device 41 based on the weft processing program, and the display lamps 41a, 41b, 41c of the display device 41.
Is displayed individually depending on the cause of the processing error,
These integrated values are individually displayed on the display units 41d, 41e, 41f.

In the present embodiment, the processing of the weft inserted immediately before the machine stoppage is performed based on the weft processing program shown in the flowchart of FIG. 5, and its operation will be described below.

When a weft insertion error occurs, the error yarn Y 'is placed on the front of the woven fabric W.
A weft insertion error detection signal is issued from the feeler F while being woven into W1, and an operation stop command is issued from the control device C to the machine driving motor M based on the signal.
At the same time, an operation command is sent from the control device C to the electromagnetic solenoid 22 of the weft cutting device 15 and the electromagnetic solenoid 14 of the weft insertion preventing device. By the operation of the electromagnetic solenoid 22, the cutting function of the weft cutting device 15 is canceled, and the miss yarn Y 'is maintained connected to the weft insertion main nozzle 2 without being cut. Also, the operation of the electromagnetic solenoid 14 keeps the weft locking body 10 in a state of intersecting with the yarn winding surface on the drum 4 and is ejected from the weft insertion main nozzle 2 following the miss yarn Y 'during the machine inertia operation. The weft insertion of the weft Y1 is prevented. After sending the weft insertion error detection signal, the machine makes almost one rotation due to inertia,
The machine stops just before the slay reaches the dashed line position shown in FIG. After the machine stop, a reverse rotation operation command is sent from the control device C to the machine drive motor M, and the machine stops at the last retreat position to form the maximum warp opening state.

After the machine base reverses, the suction device 25 is activated, the electromagnetic solenoid 14 is deactivated, the electromagnetic valve 7 is opened for a predetermined time, and the blow device 43 is activated, and the weft Y1 on the drum 4 is ejected from the weft insertion main nozzle 2. You. In this case, there are a main nozzle for weft insertion, in which a breeze is jetted when the normal machine stand is stopped, and a jet in which a fluid is not jetted at all.In the former case, when the operation of the electromagnetic solenoid 14 is released, the weft is generated by the breeze. Y1 is injected. In the latter case, the weft Y1 is injected by supplying a fluid to the main nozzle for weft insertion. Thereby, the weft Y1 is sucked and introduced into the suction pipes 26 and 27 by the jet flow from the blow pipe 42 and the suction flow in the suction pipe 26. The weft Y1 in the suction pipe 26 is the weft detector 4
5,46, and based on the detection result, the cutter
24 is activated. In this suction introduction state, the weft Y1 is passing through the cutting area of the cutter 24, and the cutting operation of the cutter 24 cuts and separates the weft Y1 from the weft insertion main nozzle 2.

Thereafter, the air cylinder 34 is operated, and as shown in FIG. 3, the drive roller 29 and the driven roller 37 and the length measurement roller 30 and the length measurement roller 40 are pressed against each other with the weft Y1 therebetween. After the pull-out roller pair 29, 37 and the length measuring roller pair 30, 40 press and hold the weft Y1, the motor 28 is operated, and the pull-out roller pair 29, 3
The pull-out operation of 7 starts the pull-out of the miss yarn Y '. Along with the transfer of the weft Y1, the length measuring roller pairs 30, 40 holding the weft Y1 by pressing are rotated. The rotation of the length measuring roller 30 causes the magnetic body 32 to prescribe a rotation trajectory around the roller shaft 30a. Each time the magnetic body 32 and the magnetic displacement detector 33 approach, a pulse signal is input to the control device C. The number is counted in the control device C. When the miss yarn Y 'is completely pulled out from the warp shedding without cutting, the end of the miss yarn Y' passes through the length measuring roller pair 30, 40. When the end of the miss yarn Y 'passes through the pair of length measuring rollers 30, 40, the rotation of the pair of length measuring rollers 30, 40 stops, but the rotation amount of the length measuring roller 30 is determined by the control device C as the count number n of the pulse signal. It is grasped by. The length of the miss yarn Y 'is the weft detector 45, 4
6 from the installation position to the end of the miss yarn Y '
The range [n1, n2] (n1 <N <n2) including the number N of pulse signals corresponding to the length of the miss yarn Y 'is preset and stored in the control device C. The count number n of the pulse signal is included in the range [n1, n2], and the control device C determines that the withdrawal of the erroneous yarn Y 'is successful based on the confirmation result. Then, based on the confirmation result, the machine is automatically reversed to the position most suitable for the restart, and the machine automatically restarts from the same reverse position.

If a cutting accident occurs during the pulling out of the error yarn Y ', when the cut end of the error yarn Y' passes through the length measuring roller pair 30, 40, the rotation of the length measuring roller pair 30, 40 is stopped, and the length measuring roller pair is stopped. The amount of rotation of 30, 40 is the number of pulse signals m, and the controller C
It is grasped by. The count number m becomes n1> m and deviates from the range [n1, n2], and the control device C determines that the pulling out of the erroneous yarn Y 'has failed based on the confirmation result. By this determination, the control device C sets the display lamp 41 for the thread breakage alarm.
A is turned on, and a command is issued to display a value obtained by adding 1 to the display number of the display section 41d which is already displayed. Even when the miss yarn Y 'is blown out during weft insertion and its length is shorter than it should be, lighting of the display lamp 41a and integrated display of the display unit 41d are performed. With this thread break display, the operator can see the W1
A part of the upper error yarn Y 'can be immediately confirmed, and the error yarn Y' can be removed without delay.

If the miss yarn Y 'is entangled with the warp T, the weft detector 4
The pull-out operation of the pull-out roller pair 29, 37 is performed based on the detection result of the weft presence by 5, 46, but the pressing force between the pull-out roller pair 29, 37 is set so as not to cut the miss yarn Y '. By doing so, the error yarn Y '
Cannot be pulled out, and the count number n becomes 2 <n and departs from the set range [n1, n2]. That is, the count number n indicates the withdrawal time, the control device C determines the entanglement of the erroneous yarn Y 'with the warp T based on the time over, and turns on the display lamp 41b for the yarn entanglement warning, and displays the already-displayed. Command to display a value obtained by multiplying the display number of the displayed display unit 41e by one. With this yarn entanglement display, the operator can immediately confirm the erroneous yarn Y 'entangled with the warp T, and the erroneous yarn Y' can be removed without delay.

If the machine stop was performed based on the signal from the feeler F, but there is no weft in the suction pipe 26, the control device C determines that there is a weft supply error and turns on the display lamp 41c for warning of a weft supply error. At the same time, a command is issued to display a value obtained by multiplying the display number of the already displayed display unit 41f by one. By displaying the weft supply error, the operator can immediately confirm the weft entanglement on the weft length measuring and storing device 3 and the breakage of the weft on the supply path leading to the main nozzle 2 for weft insertion. Can be applied to

Confirmation of the cause by the operator by individually displaying the elimination of the cause of the processing error as described above, which cannot be dealt with by the weft processing operation of the weft processing device including the weft insertion preventing device, the weft cutting device 15 and the weft pulling device 23. The troublesome work process of work can be omitted. Then, the subsequent cause elimination processing, machine reversal, and restart are moved to manual operation.

The classification and integration of the causes of errors that cannot be handled by the weft processing device enables the occurrence tendency of each error cause to be ascertained. It is possible to make adjustments that can suppress the frequency of occurrence of these error causes. That is, a relatively long processing time error that cannot be processed by the weft processing device is replaced with a mistake that can be processed in a short time by the weft processing device, and the operating efficiency of the loom can be improved. In addition, the classification and integration of each loom can be centrally controlled, and efficiency control can be performed for each loom, or defects in weft strength can be found and used for quality control in the spinning process.

The present invention is, of course, not limited to the above-described embodiment. For example, the present invention may be applied to a shuttleless loom having a weft processing device that pulls up a miss yarn from the inside of a warp opening through a warp between warps. It is possible.

Effect of the Invention As described in detail above, the present invention grasps the quality of the weft pulling-out processing result and the pulling-out state based on the comparison between the preset drawing-out length, the drawing-out time, and the like and the measurement result, and at least the grasping result. And the causes of processing errors determined from the absence of a weft in the confirmation of the presence or absence of a weft are individually displayed, so that the processing efficiency of operators who can handle errors that cannot be dealt with by the weft processing device is improved, and high productivity is achieved. The advantage of the present invention is that it is possible to avoid a decrease in the operating efficiency of the shuttleless loom that requires the following.

According to the invention described in claim 2, the frequency of occurrence of these error causes is suppressed while permitting an increase in the occurrence of weft insertion errors that can be dealt with by the weft processing device based on the understanding of the tendency of occurrence of each error cause. Possible adjustments can be made.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a schematic plan view of the vicinity of a slay, FIG. 2 is a side view of a weft pulling device and a weft cutting device, and FIG. FIG. 4 is a block diagram, and FIG. 5 is a flowchart showing a weft processing program. Weft measuring and storing device 3, which constitutes a weft processing device, a weft cutting device 15, a weft pulling device 23, and a display device 4
1, control device C, miss yarn Y '.

Claims (2)

(57) [Claims] 1. A shuttleless loom having a weft processing device for pulling out a weft inserted immediately before a machine stop from inside a warp opening to outside a warp opening, the presence or absence of the weft before the weft pulling operation of the weft processing device. In the case of a detection result of the presence of a weft, the weft processing device is operated to perform the weft withdrawal operation, and the length of the weft to be withdrawn, the withdrawal time, etc. are measured, and a preset withdrawal length is set. The quality of the weft withdrawal processing and the state of withdrawal are grasped based on the comparison between the withdrawal time and the measurement result, and at least the grasping result and the cause of the processing error determined from the no weft result in the weft presence / absence confirmation are individually determined. The weft processing method in the shuttleless loom shown in Fig. 2. The weft processing method in a shuttleless loom according to claim 1, wherein an integrated value of the number of times of display of the cause of the processing error is individually displayed.