JPH02289152A - Corrective action to malfunction of loom - Google Patents

Abstract

PURPOSE:To readily and quickly cope with malfunction without depending upon past data in malfunction of operation state by performing future adjustment using weaving condition at transferring to normal operation state as standard data. CONSTITUTION:Store button 113 of controller 101 is pushed after finishing maintenance and adjustment of every parts of loom to transfer to normal operation state and the same weaving condition is stored into memory 115. Said state is continuously monitored by monitor 109 and information data of the same monitor are written in recording part 111. In a malfunction of operation state, monitor information data of the same time and standard data called from memory 115 are indicated on display, etc., and examined.

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) This invention provides a malfunction countermeasure method for finding the cause of malfunction and repairing the malfunction when a malfunction occurs during operation of a loom. Regarding.

<Prior art> For example, in a fluid injection type am, when abnormal stoppage frequency due to poor weft insertion increases or rotational fluctuations become too large, if a malfunction is observed in the operating state, the worker may After inspecting the condition and finding the cause, repairing it and confirming the results, the loom is restarted. Conventionally, this work, especially finding the cause described above, sometimes took a large amount of man-hours, and this also led to a decrease in the operating rate of the an.

On the other hand, in order to perform such work efficiently, the following control method is published in Japanese Patent Laid-Open No. 63-75149.

That is, this method can be used, for example, in an air-jet loom,
First, the work in progress includes the loom's yarn type, structure, weaving density, weaving conditions adapted to the woven fabric conditions during weaving, and the details of warp breaks, weft insertion mistakes, and other weaving defects that are expected during the operation of the 11 looms. Correction details of the above 11% 1 condition according to the and occurrence tendency,
are set based on past data and stored in the memory of the control device. The above II manufacturing conditions are as follows:
These include the rotational speed of the loom, the injection pressure and injection timing of the main nozzle and sub-nozzle for the poem case, the operation timing of the weft length measuring device, the amount and timing of warp shedding, the warp tension, and its ratio. When a weaving defect occurs during operation of the loom, correction contents corresponding to the content and tendency are recalled from the memory and necessary measures are taken automatically or manually.

(Problem to be Solved by the Invention) By the way, in the above-mentioned control method, weaving conditions that are adapted to the weaving conditions are set, and furthermore, #! In order to set correction contents for weaving conditions corresponding to manufacturing defects, it is absolutely necessary to accumulate past data. In other words, this control method is suitable for high-volume production of a small number of products, and cannot be universally adopted for high-productivity, short-cycle textile production. Therefore, in the case of such small-volume production, it is necessary for workers to find the cause of the malfunction and perform repair work as described above.

Incidentally, the above-mentioned fluid jet loom was originally developed for mass production, but recently there has been a trend to take advantage of its high productivity to produce unique textiles in short cycles. is increasing.

Therefore, an object of the present invention is to make it possible to take appropriate countermeasures easily and quickly when a problem occurs in the operating state of a loom without relying on past data.

[Structure of the Invention] (Means for Solving the Problem) As shown in the flowchart of FIG. 1, the method of the present invention for solving the above-mentioned problem includes, after completing the maintenance and adjustment of each part of the loom (step S1), After confirming that each part is functioning well, step 82) shifts the loom to a normal operating state (step S3), and stores the state monitor information of the manufacturing conditions in this initial operating state in the memory as reference data. On the other hand, while sequentially writing the status monitor information of the weaving conditions during operation (step S5), when a problem occurs in the operation status (step 36), the reference data is called (step S4). 5
7) Perform diagnostic adjustment to align the contents of the information data entered in IyI note 1 with this standard data (step S
8), It is a thing.

(Function) As is clear from the above structure, in this method, each part of the loom is maintained and adjusted and trial weaving is performed, as is normally done in the preparation stage of production, to ensure that each part functions well. The state of each weaving condition when it is confirmed that the weaving machine can be operated normally is considered to be the ideal state for the target textile. This data is stored and used as reference data for subsequent diagnostic adjustments. Since this standard data includes even the individual quirks of the J1 machine, the content is extremely reasonable for that loom.

Therefore, when a problem occurs in the operating state, call for reference data! 1. By comparing this with the monitor information data collected when the malfunction occurred and finding the differences, the target and content of the diagnosis can be easily and accurately grasped, and based on this, the above differences can be determined. Good operating conditions can be reproduced by making adjustments to eliminate this and aligning it with the reference data.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 2 to 4.

This embodiment is directed to an oven-type composite nozzle type air injection loom, and first, an outline of an example of this loom will be described.

Mainly explaining the warp series using FIG. 2, a row of warp threads Y sent out from the yarn beam 1 passes through the backrest roller 3 and heads toward the weaving section 11. The backrest roller 3 is supported by an easing means 5 and applies a required tension to the warp yarns Y while adapting to the opening/closing movement of the warp yarn rows. Further, the yarn beam 1 is rotationally driven, for example, from a counter shaft 7 of a loom through a continuously variable transmission n9 whose transmission ratio is adjusted in conjunction with the above-mentioned easing means 5.
is fed out while maintaining the above-mentioned required tension. The yarn beam 1 may be driven by another feeder.

The rows of warp yarns Y heading towards the weaving section 11 are given an opening and closing motion by the healds 13, and the weft yarns W inserted into the openings go up to the reed 15 and are beaten to 111 yen + F, so that the woven fabric C is woven. Manufactured. The reed 15 is fixed to the sley 23 on the sley sword 21, and is driven back and forth from the main shaft 25 of the #1 machine via a crank transmission 114ff29. The main shaft 25 is rotationally driven by a main motor 27 via a V-belt 28 and the like at a predetermined rotation ratio.

After the woven fabric C is engaged with the press beam 31 and turned, it is wound around the cross beam 37 while being pulled between the press roller 33 and the surface roller 35.

The weft insertion system of this loom will be explained using FIG. On the front surface of the row of reed blades 17 in the reed 15, the oven-type air guide groove 19 is formed by a row of recesses 17a (FIG. 2) formed in each reed blade. A main nozzle 51 for weft insertion is fixed to one side (weft insertion side) of the slay 23, and a pressure air source 53 is connected to this main nozzle.
Main pressure air is supplied from the main pressure air through the pressure regulator 55, surge tank 57, and electromagnetic valve 59 in sequence, and can be injected toward the air guide groove 19. Further, on the front side of the 17 rows of several birds, a plurality of sets, in this example, four sets of 1-nub nozzles 61 (61a to 61 d) are arranged in a - row and supported by the sleigh 23, and each set of rib nozzles 61a
~61d are connected from a pressure air source 63 to a pressure regulator 65 (65a~65d) and a surge tank 67 (65a~65d), respectively.
67a to 67d), and solenoid valves 69 (69a to 6
9d), so that the auxiliary pressure air can be injected from the side of the air guide groove 19 toward the diagonally opposite weft insertion side.

Reference numerals 60 and 70 (70a to 70d) are pressure sensors disposed immediately before the main nozzle 51 and sub nozzles 61a to 61d, respectively, and are connected to the pressure regulator 55.
And the actual injection pressure is detected in relation to the set pressure at 65a to 65d.

A weft arrival sensor 41 is provided on the side opposite to the weft insertion side of the air guide groove 19 in the same line as the guide groove.

The weft storage device 71 of this loom is of a drum type. That is, a length measuring bottle 75 is inserted into the outer peripheral tip of the drum 73 which is supported in a stationary state, and this length measuring bottle is pulled back from the drum 73 when the electromagnetic actuator 77 is excited. The weft W from the yarn supply source is drawn from the hollow shaft of a wind motor 79 to the main nozzle 51 via a yarn guide 83 at the tip of an arm 81 that is rotationally driven by the motor 79. As a result, when the arm 81 rotates, the weft W is wound and stored behind the measuring bin 75, and when the storage 1 exceeds a predetermined value, the storage m sensor 85 detects this and stops the wind motor 79. .

A weft passage sensor 87 is disposed opposite to the outer peripheral tip of the drum 73. Further, a rotation angle sensor 91 such as an encoder is attached to the main shaft 25 to transmit a crank angle signal 301 of the loom. This crank angle is calculated starting from the beating phase of 00.

First, the basic operation of the weft insertion system will be explained.

After beating is completed at the crank angle O'', when the start of the next weft insertion approaches, the solenoid valve 59 of the main pressure air system is activated.
When the valve is opened, air whose pressure is regulated by the pressure regulator 55 is pre-injected from the main nozzle 51. Immediately after that, when the weft insertion start time arrives, the electromagnetic actuator 77 of the weft storage device 71 is excited and the length measuring bin 75 is pulled out from the drum 73. Therefore, as described above, the weft yarn that had been wound and stored behind this sub-long bin is unwound from the drum 73 and is pulled by the jet airflow of the main nozzle 51, and travels along the air guide 2m! It is injected within 19. Next, the first electromagnetic valve 69a in the auxiliary pressure air system opens, and the air whose pressure is regulated by the pressure regulator 65a is injected from the first set of sub-nozzles 61a in the manner described above. This jetted airflow captures the tip of the ejected weft yarn and blows it to the second set of sub-nozzles 61b[Ql. Then, air is injected from the second set of sub-nozzles 61b in the same way, and when the above-mentioned blow-off operation is taken over by the second set of injected airflow, the solenoid valve 69a closes and air is injected in the first set. Stop. Similarly, the blow-off operation is then taken over by the third group of sub-nozzles 61G, and then by the fourth group of sub-nozzles 61d. As a result, the weft yarn is pulled by its leading end and further flies toward the opposite side of the weft insertion side with inertia.

Air injection from the main nozzle 51 is then stopped at an appropriate time during this process.

On the other hand, the weft passing sensor 87 of the weft storage device 71 detects each time the weft is unwound once from the drum 73 and issues a weft insertion length signal 303, and when the weft insertion length reaches one pick, That is, when the transmission frequency of the signal 303 reaches a predetermined value, for example 4, 1! Magnetic actuator 7
7 is demagnetized. As a result, the length measuring bin 75 is
3, the flying weft is locked in the length measuring bin and brake is applied from the weft insertion side, so that the weft is stretched straight and the weft insertion is completed. At this time, the weft thread arrival sensor 41 detects the weft thread tip and issues a weft thread arrival signal 305 to the effect that weft insertion has been carried out smoothly.

Now, in the operation preparation stage described above, the cleaning conditions corresponding to the textile conditions of the target textile are provisionally set based on standard specifications or experience, and these are set in the weaving condition setting section 103 of the control device 101. Brisella 1~ is given.

The drive control section 105 controls the drive of each part of the m machine according to the weaving conditions set in the setting section 103 and instructions from the abnormal stop control section 107.

The above-mentioned weft insertion conditions include, in addition to the rotational speed of the main shaft 27 (main shaft 25), the start and end of weft insertion, i.e., the operation command 201 to the electromagnetic actuator 77 in relation to the basic operation described above. The transmission timing of the valve opening command 203 to the solenoid valve 59 in the main pressure air system and the set pressure in the pressure regulator 55, the valve opening command 205a to 205d to each of the solenoid valves 69a to 69d in the auxiliary pressure air system. The transmission timing, the set pressure at the pressure regulators 65a to 65d, the weft insertion length signal 303 from the 19-thread passing sensor 87, the predetermined transmission frequency (4), etc. are selected.

Further, in connection with these weft insertion conditions, warp conditions such as the warp shedding amount, opening/closing timing, warp tension, etc. are provisionally set in the warp series shown in FIG. 2.

The opening amount and opening/closing timing can be adjusted to an appropriate one by adjusting the fitting system of the heald 13, and the tension can be adjusted to an appropriate one by adjusting the easing spring 5a of the easing means 5 and other components. can do.

Reference numeral 45 is a warp tension sensor. The main body of this sensor has a pressure of 1! It consists of elements, one each attached to the left and right machine frames. Then, several lower threads of the warp are placed on top of each sensor 45 so that the piezoelectric element is pressed by their tension. Therefore,
When the lower and upper threads of the warp Y row perform an opening/closing movement while exchanging places, the warp tension changes in accordance with the opening/closing timing and in accordance with the opening amount, so the tension state signal 311 from the warp tension sensor 45 is , is output in the form of a function of the set tension, opening/closing timing, opening 1, and the number of bobbin threads to be placed, and this is repeated with one circulation of the fabric structure as one cycle.

Once the weaving conditions have been temporarily set in this manner, trial weaving is performed based on these conditions, and adjustments are made if any problems are found, and maintenance and adjustments are made before actual operation begins. The monitor 109 monitors these #I conditions and causes the recording unit 111 to record the status monitor information. FIG. 4 shows an example of the record of the weft insertion conditions when the maintenance adjustment is completed.

Chart A in the figure is a plot of the crank angle signal 301 from the rotation angle sensor 91, and serves as a reference for checking the operation timing of each part.

Chart B shows the weft insertion timing. In other words, the start of weft insertion is 90°, the end of weft insertion is 210°, and the above 90°
When the length measuring bin 75 is taken out from the drum 73 at
03, the operation command 201 is sent to the electromagnetic actuator 77 in order to re-enter the sub-length bottle into the drum.
is emitted.

This activation command is displayed in the form of voltage. Chart C
is a plot of the weft insertion length signal 303 from the weft passing sensor 87.

Chart D shows the injection timing of the main nozzle 51, and the valve opening command 203 (voltage signal) to the electromagnetic valve 59 is from 85° at 5° at the beginning of weft insertion (the preceding injection period) to 180° at the middle of the weft insertion period. The injection pressure detected by the pressure kahinza 60 is distributed like a curve P.

11-to E-H is the injection timing of the sub nozzles 61a to 61d, and the valve opening command 2 to the electromagnetic valves 69a to 69b is
05a to 205d are emitted sequentially overlapping each other. Pa to Pd are injection pressure curves detected by the sensors 70a to 70d. The weft arrival signal 305 is marked in the chart.

Further, it is preferable that the monitor 109 monitors the temperature of the main parts of the llili machine and other weaving conditions, and records these in the recording section 111 as auxiliary monitor information. This is to make it easier to find the cause of the disorder later on.

These auxiliary monitor information data include the electromagnetic valve 5
9. Temperatures of the respective llenoid mounting parts of 69a to 69d and the electromagnetic actuator 77, bearing temperatures of the main shaft 25, surface roller 35, etc., lubricating oil temperatures of the continuously variable transmission 9, crank transmission mechanism 29, etc. are selected as appropriate. is,
Other data such as the current of the main motor 27, the vibration waveforms of the main shaft 25 and the above-mentioned bearings, the air velocity distribution of the air guide groove 19, especially on the side opposite to weft insertion, are collected as necessary.

As mentioned above, after completing the maintenance and adjustment of each part of the loom and confirming that it can operate continuously without any malfunction, the control device eF1
,01, the monitor information of the weft insertion conditions recorded in the recording section 111 at that time (the fourth
), monitor information (311) of the warp conditions detected by the warp tension sensor 45, and auxiliary monitor information such as the above-mentioned temperature are stored in the memory 115 as reference data. Then, the monitor 109 continues to monitor these states and writes the monitor information data to the recording unit 111.

Incidentally, these information data may be erased sequentially starting from the information data that has been written first.

In this way W! If an abnormal stop or other malfunction occurs while the machine is continuing to operate, or if the machine is stopped for a regular checkup, the monitor information data at that time and the memory 115 are saved. The called reference data is displayed on the display 117, for example, and a medical examination is performed while examining whether there are any differences between the two.

Some examples of diagnosis regarding the weft insertion conditions shown in Fig. 4 will be described.

If these intervals according to the monitor information are, for example, periodically expanded or contracted with respect to the reference plot interval of the crank angle signal 301 in the chart A, this indicates that the uneven rotation of the main shaft 25 has increased. Therefore, the cause is found and repaired. At this time, if any of the above-mentioned bearing temperatures, lubricating oil temperatures, vibration waveforms, etc. differ from the standard data, the cause can be determined. Diagnosis can be made by first narrowing down the location of the problem.

At the weft insertion timing in chart B, first, the command timing of the actuation command 201 to the electromagnetic actuator 77 and the voltage waveform are compared to see if there is a difference in the monitor information. This command voltage affects the driving speed of the length measurement bin 75, so if a substantial difference is found, it is important to align this waveform with the reference data along with the command timing. Adjustments are made.

On the other hand, the above voltage waveform may also change due to a malfunction on the electromagnetic actuator 77 side.

For example, when handling the measuring bottle 75 during operation, if it comes into contact with the drum 73, the initial value of the command voltage will increase, and the temperature of the mla actuator will increase accordingly, so these differences Considering the above points, the warp storage device 7
Diagnosis adjustment on the first side is performed first.

If the phase data based on the monitor information differs from the phase of the weft insertion length signal 303 in chart C, this indicates that a change has been brought about in the speed distribution of the weft during flight, and also in chart Weft arrival signal 30
If the phase data based on the monitor information is different from the phase No. 5, it indicates that the average flying speed of the weft has changed. These data provide useful materials for analyzing the chart D-H, and can also be used to directly determine the weft flight path, especially the condition of the air guide groove 19 and the sub nozzles 61a to 61a.
When installing 61d, inspection of the condition is recommended. In this case, the aforementioned airflow velocity distribution data as auxiliary monitor information is effectively utilized.

Regarding the injection timing of the main nozzle 51 in chart D, first, the data of the monitor information is compared with the command timing of the valve opening command 203, and then the command voltage waveform and the form of the injection pressure curve P are correlated with each other. This is because a change in the command voltage waveform affects the opening/closing operation of the solenoid valve 59 and disturbs the form of the injection pressure curve P. If there is a significant difference between these, the drive control unit 105, pressure regulator 55, etc. are diagnosed.

The form of the injection pressure curve P also changes due to a malfunction in the solenoid valve 59 itself, such as an increase in valve operating resistance. In this case, the solenoid temperature rises, so it can be determined from that data whether or not diagnosis of the solenoid valve is required. be judged. Chart E-
The same diagnostic adjustment as in chart D is also performed for H.

As described above, once the diagnostic adjustment is performed for the warp series as well as the weft insertion system, and the collected monitor information data is aligned with the reference data, 1ilfi is restarted to avoid operation.

In countermeasures against such problems, the embodiment employs the above-mentioned auxiliary monitor information on the same level as the status monitor information of the weaving conditions, making it possible to find the diagnosis target extremely efficiently. .

[Effects of the Invention] As explained above, the present invention uses the Il manufacturing conditions when the loom is put into normal operation after completing maintenance adjustments to prepare for operation as reference data, and uses this as reference data for subsequent comparative judgments. Since this standard data can be used as the basis for each target fabric during the normal operation preparation work time, if a problem occurs, the monitor information data at that time can be used as the standard. By comparing with the data, the validity and content of the diagnosis can be easily and accurately grasped. Therefore, according to the present invention, it is possible to extremely efficiently take countermeasures against problems in the production of high-mix, short-cycle pure products from the preliminary stage to the implementation stage, thereby reducing the number of man-hours and Furthermore, it is possible to improve the operating rate of the loom.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the procedure of this invention.
Figures 2 and 3 are schematic diagrams of an air injection loom as an embodiment of the present invention, with Figure 2 showing the warp thread system, and Figure 3 showing the weft thread system, respectively. FIG. 4 is a miniature diagram illustrating reference data of status monitor information. 11...Il making section 7...Main motor...Main nozzles 1a to 61d...Sub nozzle...Weft storage device 01...&lJt [l device 03...Weaving condition setting section 07...・Abnormal stop control unit 09...Monitor 15...Memory 17...Display

Claims (1)

[Claims] After completing the maintenance and adjustment of each part of the loom and confirming that each part is functioning well, the loom is moved to its normal operating state and the status monitor information of the weaving conditions in this initial operating state is stored in memory as reference data. On the other hand, while sequentially writing status monitor information of weaving conditions during operation,
When a malfunction occurs in the operating state, the method calls out the reference data and performs diagnostic adjustment to align the contents of the written information data with the reference data.