JP2009215694A - Weft-insertion-condition display unit for loom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weft-insertion-condition display unit for a loom that indicates changes in a weft-insertion condition of a loom in a chronological fashion. <P>SOLUTION: A weft-insertion-condition display unit 20 for a loom includes weft-arrival-timing detection means for detecting weft arrival timings based on a yarn signal obtained by detecting a weft yarn on a weft-traveling path; statistic-computing means for calculating statistics of the weft arrival timings based on the weft arrival timings detected for a predetermined number of picks; and display means for storing the calculated statistics corresponding to sampling picks with respect to an operating time, graphically displaying the magnitudes of the stored statistics on a screen along an axis corresponding to the sampling picks in response to a request for screen display, and displaying at least one of an output condition of the warning signal and a generation status of a weft-insertion failure at a position corresponding to the sampling pick generated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a device for calculating statistical values of weft insertion status and displaying those statistical values in a loom.

In a loom, particularly a fluid jet loom, when adjusting the weft insertion, the weft insertion nozzle pressure and injection timing are adjusted using the weft arrival time as a guide. As a guideline for this adjustment, there is a method of numerically displaying the weft arrival time on the setting device of the loom based on the yarn signal of the weft filler (Patent Document 1).

In addition, as for the display of the arrival angle, there are a display for each weft pick and a statistical value (average value or the like) obtained over a predetermined pick by a numerical value (Patent Document 2). In the case where the arrival angle is displayed for each weft insertion pick, the numerical value changes for each pick, so the characteristics are difficult to understand. Thus, conventionally, there is no setting device on a loom that effectively displays statistical values over time.

Further, a technique for recording stop time, cause of stoppage and maintenance information for the purpose of maintenance management of the loom is disclosed (Patent Document 3). There is only written management based on the time.

JP-A-62-231057 JP-A-9-195145 Japanese Patent Laid-Open No. 62-257445

Accordingly, an object of the present invention is to make it possible to easily grasp a time-series change in the weft flying situation of a fluid jet loom.

Therefore, the present invention provides a weft arrival time detecting means (30) for detecting a weft arrival time based on a yarn signal obtained by detecting the weft (4) on the weft flight path, and a plurality of detected picks over a predetermined number of picks. based on the timing the weft arrival, a statistic calculator for calculating statistics of the weft arrival times (40), the statistical value calculated by the statistic calculator (40), the temporal course of the operating period a plurality of stored corresponding to the sampling pick is, in response to a request of a screen display, a plurality of statistical values the memory contains a statistical value obtained in the weft yarn supply member currently in use, time period of operation the sampling pick on the screen whose axes are Do elapsed, as well as graphic display in response to the magnitude of the statistical value, at least one of occurrence of the alarm output status and weft for said statistics, issued The display means for displaying a position corresponding to the sampling pick (41), constitute a weft-insertion-condition display apparatus of the loom by (claim 1).

The display means (41) graphically displays the plurality of statistical values in response to selection of one or more of the sampling number and the weft color which are requests for the screen display (claim 2). In the display means (41), a threshold value for warning is preset for one or more of the types of statistical values, and during the weaving operation, the display means (41) is provided with the statistical value calculation means (40). compared to a corresponding said threshold statistics from, the alert output when the statistic exceeds the corresponding threshold value (claim 3).

The display means (41) is provided so that alarm output ON / OFF selection for a statistical value can be selected for each type of statistical value, and the display means (41) is selected so that the alarm output is OFF. In the state, even if the statistical value exceeds the corresponding threshold, no alarm is output (Claim 4). The display means (41) can set the alarm threshold value as a unique numerical value for each weft color (Claim 5).

In the present invention, since a plurality of statistical values of the weft arrival time calculated by the statistical value calculation means and stored corresponding to the operation progress are displayed graphically on the time series axis corresponding to the size of the statistical value, The temporal change in the statistical value of the weft arrival angle can be easily confirmed visually. Therefore, it is possible to estimate factors based on changes over time in this statistical value, for example, to improve the quality of weft supply or to reset the weft insertion conditions so that weft insertion is stabilized. It is advantageous in managing the weft insertion (claim 1).

In particular, in the process of graphic display corresponding to the magnitude of the statistical value, it is displayed on the same screen at a position corresponding to the sampling pick in which at least one of the alarm output situation and the weft insertion situation has occurred. It is possible to confirm the past alarm occurrence status and the occurrence status of the weft insertion error, and the root cause can be identified more accurately (claim 1).

Since the plurality of statistical values are graphically displayed in response to selection of one or more of the sampling number and the weft color which is a request for the screen display, the operator can display the statistical values according to the sampling number and the sampling pick number. Or the weft insertion status can be confirmed for each yarn type, and appropriate measures can be taken (claim 2).

During the weaving operation, the display means (41) compares the statistical value from the statistical value calculation means (40) with the corresponding threshold value, and outputs the alarm when the statistical value exceeds the corresponding threshold value. The warning allows the operator to notice an abnormality in the weft insertion situation and to grasp the details of the fluctuation tendency over time, so that the root cause of the weft insertion abnormality can be identified and resolved more quickly. ).

The display means (41) is provided so that alarm output ON / OFF selection for a statistical value can be selected for each type of statistical value, and the display means (41) is selected so that the alarm output is OFF. In the state, even if the statistic value exceeds the corresponding threshold value, no alarm is output. Therefore, when the target statistic value exceeds the threshold value during weaving by the selection setting of “Alarm ON / Alarm OFF”, an alarm is issued. Whether to output or not to output can be selected (claim 4).

Since the alarm threshold value can be set for each weft color, it can be set as a unique numerical value for each weft color.

It is explanatory drawing of the principal part of the weft insertion apparatus 1 of a loom. It is a block diagram of the weft insertion status display device 20 of the loom according to the present invention and the first weft filler 21 related thereto. It is a block diagram of the structural example of the display means 41 of this invention. It is explanatory drawing of the example of a display of the statistics value by the display means 41 of this invention. It is explanatory drawing of the example of a setting of the alarm by the display means 41 of this invention. It is explanatory drawing of the example of a display of the alarm by the display means 41 of this invention. It is explanatory drawing of the example of a display of the statistics value by the display means 41 of this invention.

FIG. 1 shows a main part of a weft insertion device 1 of a fluid (air) jet loom as a loom. In FIG. 1, the weft 4 drawn from the yarn feeder 3 supported by the holder 2 is guided to the rotating yarn guide 6 of the drum-type length measuring storage device 5, for example, and the outer peripheral surface of the drum 7 in a stationary state. While being locked by the locking pin 8, the length is measured to the length necessary for one weft insertion by being wound around the outer peripheral surface of the drum 7 by the rotational movement of the rotary yarn guide 6 and until the weft insertion. Reserved.

At the time of weft insertion, when the locking pin 8 is driven by the operating device 9 and retreats from the outer peripheral surface of the drum 7, the weft 4 wound around the outer periphery of the drum 7 has a length necessary for one weft insertion. Only on the drum 7 and led to the main nozzle 10 as a weft insertion nozzle.

The main nozzle 10 injects the pressure air 12 into the opening 14 of the warp 13 over the injection period for the weft insertion operation, so that the weft 4 having a length necessary for one weft insertion is put into the opening 14. Insert the weft. As a result, the weft 4 travels along the weft travel path in the opening 14. The pressure air 12 is set to an appropriate pressure value by a pressure adjusting means (not shown).

In the process in which the weft 4 travels along the travel path in the opening 14, the plurality of groups of sub-nozzles 11 perform simultaneous injection or weft with the pressure air 15 in the weft insertion direction toward the travel direction in the weft travel path. By performing relay injection while harmonizing with the flying speed of 4, the weft 4 flying in the opening 14 is urged in the weft insertion direction. The pressure air 15 is also set to an appropriate pressure value by a pressure adjusting means (not shown).

The weft yarns 4 that have been normally weft-inserted by the injection operation of the main nozzle 10 as the weft insertion nozzle and the plurality of groups of sub-nozzles 11 are beaten on the pre-weave 18 of the woven fabric 17 by the heel 16 and woven into the woven fabric 17 After that, the yarn is cut by the yarn feeding cutter 19 on the weft insertion side and separated from the weft 4 inside the main nozzle 10.

The first weft feeler 21 for determining whether the weft insertion is correct or not as well as the weft insertion has a sensor 24. This sensor 24 faces the weft runway in the vicinity of the weft end portion on the opposite weft insertion side and is normal. The weft thread 4 is provided at a position where the weft thread 4 can reach, and the weft thread 4 is detected there. The first weft feeler 21 determines whether the weft insertion is correct from the change in the output signal of the sensor 24 during a predetermined detection period. When the arrival of the weft 4 is detected, the first weft feeler 21 generates a yarn signal S1. S1 is sent to the weft insertion status display device 20 of the loom according to the present invention, but when the yarn signal S1 is not generated within the predetermined weft detection period, that is, the arrival of the weft 4 cannot be detected due to the occurrence of a weft insertion failure. The loom stop signal S2 is output, and the loom stop signal S2 is sent to a loom control device (not shown). When receiving the loom stop signal S2, the loom control device (not shown) stops the loom at a predetermined angle.

The second weft feeler 22 has a sensor 25. The sensor 25 faces the weft runway at a position away from the weft end on the opposite weft insertion side, and the weft 4 that has been blown off by blow-off. Are detected (the blown end) and the tip of the long pick weft 4. When the second weft feeler 22 receives an output signal from the sensor 25 and detects the blown end of the weft 4 or the tip of the long pick weft 4, it generates a weft insertion abnormality signal S3 corresponding thereto.

The sensors 24 and 25 of the first weft feeler 21 and the second weft feeler 22 are opposed to the ridge groove (deformed ridge groove) of the ridge 16 so as not to interfere with the ridge 16 at the time of lashing. It is configured as a light emitting / receiving type detector incorporating a light projecting element and a light receiving element. These light emitting / receiving sensors 24 and 25 have a detection area on the weft runway, and are increased according to the amount of light reflected from the weft 4 when the weft 4 on the weft runway is detected. Generate electrical signal output. Of course, the sensors 24 and 25 may be configured as a transmissive type or other types of sensors.

FIG. 2 shows the internal configuration of the first weft feeler 21 together with the weft insertion status display device 20 of the loom according to the present invention. In FIG. 2, the output signal of the sensor 24 of the first weft feeler 21 is amplified by the amplifier circuit 26 and becomes an input of one input terminal of the comparator 27 as a signal S0. Note that the amplification degree of the amplifier circuit 26 is adjusted in advance by an amplification degree setting unit 28 to an amplification degree suitable for the yarn type. The comparator 27 receives from the other input end the threshold value setter 29 for the presence / absence of the yarn matching level in advance that matches the yarn type, and outputs the output of the amplifier circuit 26 and the threshold value for the yarn presence identification. Compare.

When the threshold value ≦ the signal level of the signal S 0 from the amplifier circuit 26, the comparator 27 determines that there is a thread, for example, generates an H level thread signal S 1, and this is determined by the determination circuit 38 of the weft insertion determination circuit 31. To the one input end of the weft arrival time detection means 30 in the weft insertion status display device 20 of the loom of the present invention. In the example of FIG. 2, the signal S0 itself obtained by amplifying the output signal of the sensor 24 is used as a determination target of the presence or absence of the yarn. It may be configured to determine the presence or absence of a yarn based on a differential signal of the signal S0 or an integrated signal obtained over a predetermined detection period. In this case, the output signal from the differentiator or the integrator can be handled as a substantial yarn signal.

On the other hand, the encoder 34 connected to the main shaft 33 of the loom generates a signal of the rotation angle θ of the main shaft 33, and the timing signal generator 35 receiving the signal of the angle θ has a weft detection period, For example, when the angle θ is 200 ° to 290 °, the weft insertion detection timing signal S5 to be turned on (H level) is generated, and this is input to the other input terminal of the determination circuit 38, the reset circuit in the weft insertion determination circuit 31. 36, and sent to the timing setting circuit 37. The signal of the angle θ is also sent to the weft arrival time detection means 30.

The determination circuit 31 receives the yarn signal S1 and the timing signal S5, and determines that the weft insertion is normal when the H level yarn signal S1 is input during the generation period of the weft insertion detection timing signal S5. The output remains at L level. On the other hand, when the yarn signal remains at the L level during the generation period of the timing signal S5, the determination circuit 31 determines that the weft insertion error and sets the output at the output end to the H level. When receiving the output of the determination circuit 38, the logic signal generator 39 generates the loom stop signal S2 at the falling timing of the signal output from the timing setting circuit 37 after the end angle (290 °) of the weft detection period. This is sent to a loom control device (not shown), and the loom is stopped at a predetermined angle. The determination circuit 38 is reset by the rising timing of the reset signal output from the reset circuit 36 at the end angle (290 °) of the weft detection period, and prepares for the next weft insertion cycle. The logic signal generator 39 is reset by the switch 23 operated by weaving after the cause of the loom stoppage is repaired.

In the above example, the determination circuit 31 determines that weft insertion is normal if the yarn signal S1 becomes H level even once in the timing signal S5 for weft detection. Not limited to the above. For example, the determination conditions for determining normal weft insertion may be that the yarn signal S1 is at the H level at the end of the timing signal S5, or that the period during which the signal is at the H level continues for a predetermined period. The plurality of determination conditions can be appropriately selected according to the type of the weft yarn 4, or two or more can be combined. Further, the amplification degree set in the amplification degree setting unit 28 and the threshold value set in the threshold setting unit 29 may be appropriately set according to the yarn type (color, thickness, etc.) of the weft yarn 4. In the multi-color weft insertion loom, the circuit can be configured so that the determination condition, the amplification degree, and the threshold value are selected in accordance with the selection signal of the weft 4. Furthermore, the processing relating to the determination of whether or not the weft insertion is correct by the comparator 27 and the weft insertion determining circuit 31 can be realized by a microcomputer and software processing. In such a case, the amplification degree, the threshold value, and the determination condition may be set via the display unit 41 that is also used as a setting device of the loom.

The weft insertion status display device 20 for a loom according to the present invention includes a weft arrival time detection means 30, a statistical value calculation means 40, and a display means 41. The weft arrival time detection means 30 detects the weft arrival time from the yarn signal S1 obtained by detecting the weft 4 on the weft flight path and the signal of the rotation angle θ, and outputs the arrival time signal S4 within the cycle. The arrival time signal S4 is output to the statistical value calculation means 40. The arrival time signal S4 is a signal indicating the weft arrival time (weft arrival time) at an angle θ on the rotation of the main shaft 33. Since the angle θ on the rotation of the main shaft 33 is proportional to the passage of time, the arrival time signal S4 is also a signal on the time series axis with the elapsed time from the reference angle (0 °) as a scale, for example. The yarn signal S1 may be an output signal from the sensor 24 or the amplifier circuit 26.

The statistical value calculation means 40 receives the timing signal S7 and the arrival timing signal S4 generated every time the reference angle (0 °) passes from the timing signal generator 35, and counts the number of times the timing signal S7 is input. The number of picks is counted, and the number of picks reaches the preset number of samples based on the weft arrival angle θ as the weft arrival time input over a predetermined number of samples (number of picks). At the time of not, the statistical value of the weft arrival time is calculated. The statistical value here is one or more of the maximum value of the weft arrival time (weft arrival angle θ) (the fastest weft arrival angle θ), the minimum value (latest weft arrival angle θ), and the standard deviation of the weft arrival time. And the average weft arrival time (angle θ).

The difference between the maximum value and the minimum value indicates the width of variation, and each value indicates the actual value of the variation range during the sampling period. Since it is an actual value, it is useful for adjusting the loom as much as the range of variation is known compared to the standard deviation. It can be determined that the cause of the weft stop (empty stop) is the instability of weft insertion (variation of arrival) from changes in numerical values and average values representing these variations. According to these maximum and minimum values, the fluctuation range thereof can be known, which is advantageous in that the pressure of the weft insertion nozzles (the main nozzle 10 and the sub nozzle 11) can be changed, for example, in adjusting the loom. The standard deviation displays the degree of variation numerically and corresponds to the degree of dispersion in the binomial distribution, the so-called peak height. On the other hand, the average value is literally an average value in a predetermined number of picks, for example, 32 picks, and from this, a rough variation in the weft arrival angle is known.

In the process of calculating the statistical value, a plurality of sampling elements (sampling numbers) are set in advance so that a plurality of sampling values can be selected. It is automatically selected according to the number, or can be selected from a plurality of settings on a setting screen (not shown). For this reason, the operator can select an appropriate sampling number and sampling pick number from among them. Note that the number of samplings here is the number of actually measured values used when calculating the statistical value of the weft arrival timing, and the number of samples (the number of sampling picks) is 32 picks as in the examples described later. When set, the statistical value calculation means 40 calculates the statistical value for one sampling pick based on the measured value of the weft arrival timing for 32 picks. Further, as the stored statistical value, each value corresponding to the number of sampling picks corresponding to one package of the yarn feeder 3 is stored.

Further, the statistical value calculation means 40 receives the weft selection signal S8 from the weft selection signal generator 42 in order to calculate a statistical value based on the data sampled for each weft color, and the maximum weft arrival time for each weft color. One or more of the values, the minimum value of the weft arrival time, and the standard deviation of the weft arrival time and the average value of the weft arrival time are calculated and output to the display means 41 as the display data signal S9. The weft selection signal generator 42 receives the timing signal S7, generates a weft selection signal S8 based on a preset weft selection order, outputs this to the statistical value calculation means 40, and also selects the weft selection. The weft insertion device 1 (length measuring storage device 5 or main nozzle 10) selected by the signal S8 is operated.

The display unit 41 stores a plurality of statistical values calculated by the statistical value calculation unit 40 corresponding to the driving progress, and the size of the stored statistical values according to a request for screen display of the display unit 41. In response to, graphic display over time.

FIG. 3 shows a configuration example of the display means 41. In FIG. 3, the display unit 41 includes a storage unit 46, a touch panel screen display 47, a port 48, and a processing unit 49. The port 48 receives the display data signal S9 and the like output from the statistical value calculation means 40, and transmits and receives signals between the processing unit 49 and the external statistical value calculation means 40 or the screen display 47, and also performs alarm processing. Along with this, an alarm signal is output to the outside.

The storage unit 46 stores a plurality of statistical values of the display data signal S9 in association with the sampling pick number. The touch panel type screen display 47 is a display capable of inputting graphic requests corresponding to a plurality of statistical values and inputting screen display requests, various commands, and data. Then, the processing unit 49 controls input / output at the port 48 according to software described later, and outputs a plurality of statistical values from the storage unit 46 in response to a screen display request from the touch panel type screen display 47. At the same time as reading, a graphic display corresponding to a plurality of statistical values is displayed on the screen display 47.

The storage unit 46 is rewritable, and includes a series of programs such as a program for controlling a touch panel type screen display 47 that functions as an input device, a program for calculating statistical values of weft arrival timing, and alarm processing. In addition to the above software, the calculated average value, standard deviation, etc. are stored in correspondence with the sampling pick number.

The processing unit 49 is a CPU, a so-called microprocessor, and controls the screen display 47 according to software stored in the storage unit 46.

As described above, the display means 41 receives the statistical value calculated by the statistical value calculation means 40 at the end of each sample period, and stores it in the memory together with the sample number (sampling number) and sample number (sampling pick number). On the time series axis on the display screen, that is, on the time series where the sampling pick is the horizontal axis and the sampling pitch number of the current weft insertion is “0”, the value is large based on each statistical value. Correspondingly, a graphic display such as a bar graph or a line graph is displayed. The operator switches the display of statistical values according to the number of samplings and the number of sampling picks, or confirms the weft insertion status for each yarn type and takes appropriate measures.

The processing unit 49 can also be configured to perform an alarm operation as necessary. For this reason, a threshold value for warning is set in advance in the processing unit 49 for one or more of the statistical values, and during the weaving operation, the processing unit 49 corresponds to the statistical values from the statistical value calculating means 40 and the corresponding values. It is also possible to output a warning when the statistical value exceeds the corresponding threshold value. Further, the processing unit 49 displays a graphic display corresponding to the magnitude of the statistical value and at least one of the alarm output situation or the occurrence situation of the weft insertion over time and on the same screen on the screen display 47. To display.

FIG. 4 shows a display example during operation by the screen display 47. On the screen, a line graph A of the average value of the weft arrival time (weft arrival angle θ) during 32 sample picks, and the maximum and minimum values of the weft arrival time (weft arrival angle θ) during 32 sample picks are shown. A tied bar-shaped graph B and a line graph C of the standard deviation of the weft arrival time (weft arrival angle θ) are illustrated. The number of samples can be selected by a sample number selection button 43 displayed at “32”, “100”, “1000” at the bottom of the screen. The display portion on the screen of the screen display 47 can be scrolled by 50 samples by a scroll button 44 with a triangular mark in the horizontal direction. When the reset button 45 at the lower right of the screen is pressed, the displayed display data is erased and new display data is taken in and displayed. Further, preferably, the screen display 47 can display multiple colors (colors), and is configured to display the graphs (A, B, C), axes, etc. in different colors. improves. Further, in the case of a multi-color weft insertion loom, it is possible to switch to the time series statistical value graph display of the weft arrival time of the selected yarn type by selecting the yarn type of the weft 4 on the display means 41.

In this way, the operator can visually confirm the temporal change in the statistical value of the weft arrival angle from the display content of the screen display 47. Therefore, the weft insertion conditions are reset to improve the quality of weft supply and stabilize the weft insertion based on the changes in the statistical values graphically displayed as the movement progresses. This is advantageous in managing the weft insertion.

  At the site of a loom factory, the cause can be easily identified by a time-series change of two or more values of display contents. For example, 1) When the average value, the maximum value, and the minimum value of the weft arrival angle fluctuate gradually, and the fluctuation fluctuates up and down every tens of minutes to several hours, the weft insertion nozzle compressor It can be inferred to be caused by pressure fluctuation. 2) When weft stops occur frequently, the average value, the maximum value, and the minimum value are different (become large) from the normal value, so that the sub nozzle 11 may be insufficient in pressure, and can be eliminated by increasing the pressure. 3) Although the maximum value and the minimum value do not change so much, when the average value changes and the standard deviation becomes large, it can be predicted that the quality of the yarn supplying body is abnormal, and this can be resolved by replacing the yarn supplying body 3 . 4) As the winding diameter of the yarn feeder 3 becomes smaller, the average value of the arrival angle should become smaller (early), but conversely, when it becomes larger (delayed), it is considered that the quality of the yarn feeder 3 is abnormal. The thread body 3 can be eliminated by replacement. Thus, there is a display function by the weft insertion status display device 20 in the loom, that is, a graphic display function concerning the statistical value of the weft arrival timing that has already been accumulated when a problem occurs in the weft insertion. For example, a weft insertion status display / analysis device that is configured independently of the setting device of a loom must be connected after a problem occurs in the weft insertion, and operation must be continued as it is to identify the cause. This is advantageous in that the cause can be immediately identified from the display contents of the weft insertion status display device 20.

Note that the loom may stop due to yarn breakage or the like during sampling of the weft arrival time. However, the weft arrival angle at the time of restart (when the loom rotational speed is in a transient state) is often different from that in the steady operation state, and if the statistical value is calculated including this data, the statistical value becomes inaccurate. For this reason, when a problem occurs, the above inconvenience can be avoided by calculating the statistical value by excluding data at the time of occurrence of a transient state or a weft stop.

More preferably, as described above, a threshold value for warning is set in advance for each of one or more of four types of statistical values (maximum value, minimum value, average value, standard deviation) in the processing unit 48, During the weaving operation, the processing unit 49 compares the statistical value from the statistical value calculating means 40 with the corresponding threshold value, and outputs a warning when the statistical value exceeds the corresponding threshold value, and the magnitude of the statistical value. In addition to the graphic display corresponding to the above, at least one of the alarm output status or the weft insertion error status is displayed on the screen display 47 over time and on the same screen.

FIG. 5 shows a so-called setting screen of “weft arrival status / alarm setting” of the touch panel type screen display 47. In FIG. 5, when the yarn package mark “1” corresponding to the yarn feeder 3 displayed on the screen is touched in order to set the alarm threshold for the weft yarn color 1, the selected yarn package (yarn feeder 3) is touched. ) Mark is displayed in a different state (hatching on the drawing) from other non-selected yarn package marks, and a warning threshold value can be input for the weft color 1. The weft color 1, the weft color 2, the weft color 3, and the weft color 4 are thread types of the weft 4, and the numbers thereof coincide with the numbers of the main nozzle 10 for multi-color weft insertion.

“Alarm ON / OFF” in the left column of the screen in FIG. 5 is a portion for designating the selection of the warning and non-selection for each pick, average value, and standard deviation by designating the weft color 1 (hatched display). By touching the corresponding box of the rectangle, x is displayed and the alarm is turned on. By touching this field again, the display of x is turned off and the alarm is turned off. By selecting “Alarm ON / Alarm OFF”, it is possible to select whether or not to output an alarm when a target statistical value exceeds a threshold during weaving. When the alarm is ON, for example, the loom can be stopped or an external tower lamp can be turned on to alert the operator.

For each pick and average value, an upper limit value and a lower limit value can be set from the viewpoint of monitoring the allowable range, and an upper limit value can be set for the standard deviation. More specifically, for each pick, it is monitored whether the weft arrival timing of one sample number detected based on the actual measurement value over the number of sampling picks has deviated from the allowable range. An alarm is generated when the maximum value exceeds the upper limit value or the minimum value falls below the lower limit value. As for the “average value”, an alarm is generated when the obtained average value exceeds the upper limit value or falls below the lower limit value. For “standard deviation”, an alarm is generated when the calculated standard deviation exceeds the upper limit. With respect to the upper limit value and the lower limit value for “every pick” and “average value”, numerical values are set with the angle on the rotation of the main shaft 33 corresponding to the weft arrival time as a scale. On the other hand, the “standard deviation” is set using a numerical value as a scale. Incidentally, there is no need to monitor the lower limit of “standard deviation”. These values can also be set as unique numerical values for the other weft color 2, weft color 3, and weft color 4. In setting these threshold values, the operator first displays a numeric keypad (not shown) for inputting numerical values by touching the corresponding input field on the touch panel screen, and then inputs the numerical values by sequentially touching the corresponding numbers. Can do.

The right column of the average value and standard deviation is a column for setting the number of samplings when calculating the average value and standard deviation. By clicking the downward triangle mark in the column, an appropriate number “1000” or “32” or the like is selected or input using a numeric keypad (not shown). These sampling numbers can also be set as unique numerical values for the other weft color 2, weft color 3, and weft color 4.

FIG. 6 is an example of an “alarm” output screen of the screen display 47, and is a display example of the screen when the average value of the weft arrival timing exceeds the upper limit threshold, that is, when the arrival delay is reached. Regardless of whether the alarm is ON or OFF, when the target statistical value exceeds the threshold, the alarm content and the time of occurrence are stored in the storage unit 46, while the alarm occurrence status is displayed on the screen. The As described above, when the alarm is ON, the loom is stopped or an alarm signal is output, and an external stop display tower lamp or the like is lit to alert the operator.

Next, FIG. 7 shows another display example of the screen display 47. In this display example, for the yarn type (weft color 1) of the weft 4 selected on the screen, the statistical value of the weft flying status is displayed in a graphic corresponding to the size. Further, if necessary, detailed information such as the stoppage of the weft insertion error, the content of the alarm, and the timing of the occurrence thereof can be displayed on the same screen on the graphic display screen. This display can be switched for each thread type in the same way for the other weft color 2, weft color 3, and weft color 4.

For the same screen display, instead of or in addition to the alarm output and weft insertion error status, countermeasures such as adjusting the weft insertion device and replacing the yarn feeder in response to an alarm or weft insertion error It is also possible to display the time and the contents to be dealt with at the same time, and when displaying such information, display them in a form added to the display contents so far by operating the screen (not shown) You can also

In the embodiment of FIG. 1, the sensors 24 and 25 that detect the weft 4 and generate a yarn signal are arranged in the vicinity of the weaving end on the opposite weft insertion side. For example, a sensor disposed in the opening 14 of the warp 13 for the purpose of detecting the flying weft 4 may be used. Further, the sensor is not limited to the one that directly detects the tip of the weft 4 in the flying state, but may be a sensor that indirectly detects the sensor. Specifically, it is possible to grasp that the tip of the flying weft 4 has reached the position corresponding to the unwinding weft length by unwinding the weft 4 a predetermined number of times from the weft length measuring storage device 5. Is used. Therefore, a unwinding sensor for detecting the passage of the unwound weft 4 is provided for the weft length measuring storage device 5.

Further, in the circuit configuration shown in FIG. 2, the sensor 24 is replaced with the above-described unwinding sensor, and at least one predetermined number of signals after the weft insertion is started between the comparator 27 and the weft arrival time detecting means 30. Is generated, a circuit for outputting the yarn signal S1 is interposed. When the yarn signal is generated from this circuit, the weft 4 having a length corresponding to the predetermined number of times is drawn from the length measuring storage device 5 by jetting the weft insertion fluid, and the position of the tip of the weft 4 corresponds to the number of unwinding windings. It is possible to indirectly detect that the position has been reached, that is, that the tip of the weft 4 has reached a predetermined position. An apparatus for detecting a weft insertion state directly or indirectly using a sensor or a circuit provided as described above is also included in the technical scope of the present invention.

2 and 3, the statistical value calculation means is configured as a separate block from the display means 41, but may be modified so as to be processed by one block. The same applies to the weft arrival time detection means 30, and the first weft filler 21 at the upper stage.

The function of the weft insertion status display device 20 of the loom according to the present invention can be realized by a program using a computer. Therefore, the weft arrival time detection means 30, the statistical value calculation means 40, and the display means 41 of the weft insertion status display device 20 of the loom can be replaced by an input / output means, a storage means, and an operation (control) means of a computer. Further, the present invention is not limited to an air jet loom but can be applied to other fluid jet looms (water jet looms) that can detect the weft arrival time.

DESCRIPTION OF SYMBOLS 1 Weft insertion apparatus 2 Loom 3 Feeder 4 Weft 5 Length measuring storage device 6 Rotating thread guide 7 Drum 8 Locking pin 9 Actuator 10 Main nozzle 11 Sub nozzle 12 Pressure air 13 Warp 14 Opening 15 Pressure air 16 空 気 17 Weaving fabric 18 Pre-weaving 19 Feeding cutter 20 Weft insertion status display device 21 First weft feeler 22 Second weft feeler 23 Switch 24 Sensor 25 Sensor 26 Amplifying circuit 27 Comparator 28 Amplification degree setting device 29 Threshold setting device 30 Weft arrival time detection means 31 Weft insertion determination circuit 33 Main shaft 34 Encoder 35 Timing signal generator 36 Reset circuit 37 Timing setting circuit 38 Determination circuit 39 Logic signal generator 40 Statistical value calculation means 41 Display means 42 Weft selection signal generator 43 Sample number selection button 44 Scroll button 45 Reset button 46 Memory 47 Screen 48 port 49 processor

A Line graph B of average value Bar graph C connecting maximum value and minimum value C Line graph of standard deviation S1 Thread signal S2 Weaving machine stop signal S3 Weft insertion abnormality signal S4 Arrival timing signal S5 Weft insertion detection timing signal S6 No thread Signal S7 Timing signal S8 Weft selection signal S9 Display data signal θ Angle of rotation

Claims (5)

Weft arrival time detection means (30) for detecting the weft arrival time based on the yarn signal obtained by detecting the weft (4) on the weft flight path, and a plurality of the weft arrival times detected over a predetermined number of picks. DOO in a statistical value calculating means for calculating a statistical value of the weft arrival times (40), the statistical value statistical values calculated by the calculation means (40), corresponding to the sampling pick a temporal course of the operating period to store a plurality, in response to a request of a screen display, a plurality of statistical values the memory contains a statistical value obtained in the weft yarn supply member currently in use, sampling pick a temporal course of the operating period in the screen to the axis, sampling with graphically in accordance with the size of statistics, at least one of occurrence of the alarm output status and weft for said statistics generated Characterized by comprising a display means (41) to be displayed at a position corresponding to the click, the weft-insertion-condition display unit of the loom (20). The display means (41) graphically displays the plurality of statistical values corresponding to selection of one or more of the sampling number and the weft color which are requests for the screen display. The weft insertion status display device (20) of the described loom. In the display means (41), a threshold value for warning is preset for one or more of the types of statistical values, and during the weaving operation, the display means (41) is provided with the statistical value calculation means (40). compared to a corresponding said threshold statistics from, wherein the fact that alarm output when the statistic exceeds the corresponding threshold value, the weft-insertion-condition display apparatus of the loom according to claim 1 (20 ). The display means (41) is provided so that alarm output ON / OFF selection for a statistical value can be selected for each type of statistical value, and the display means (41) is selected so that the alarm output is OFF. The weft insertion status display device (20) for a loom according to claim 3, wherein no warning is output even if the statistical value exceeds a corresponding threshold value in the state. The weft insertion status display device (20) for a loom according to claim 3, wherein the display means (41) can further set the alarm threshold value as a unique numerical value for each weft color.

Images