JPH06128818A - Control system of spinning machine - Google Patents

Abstract

PURPOSE:To obtain the spun yarn reduced in its periodic irregularity and piecing number by forcibly stopping each spindle when the periodic irregularity of the spun yarn at the spindle exceeds a prescribed standard or when the breakage of the yarn within a prescribed time exceeds a prescribed number. CONSTITUTION:The electric signal of the thickness of a traveling yarn always detected with the yarn clearer 37 of each spindle 31 is subjected to a frequency analysis with a spectrum analyzer. The standard value of the periodic irregularity and the standard value of the yarn breakage are set in the analyzer 3 of the spinning machine 1, and when the periodic irregularity and the yarn breakage at each spindle exceeds the standard values, the spindle is forcibly stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning machine management system, and more particularly to a spinning machine management system capable of operating a weight based on yarn quality.

[0002]

2. Description of the Related Art A spinning machine is provided with a large number of weights, and each of the weights sends a signal notifying its operating state to a control device of the spinning machine. The operating state is represented by coding with 2 bits by combining a yarn traveling signal indicating that the yarn is traveling normally and an abnormality warning signal indicating that an abnormality such as natural yarn breakage has occurred. It is represented as a status (Table 1). By this combination, the operating state of each weight is divided into one of the normal operating status, the slab thread breakage status, the natural thread breakage status, and the full thread status. In Table 1, the yarn traveling signal is written as FW, and the abnormality warning signal is written as red flag.

[0003]

[Table 1]

The fact that there is a distinction between the thread breakage states will now be described.

First, each weight is equipped with a device called a yarn clearer. The yarn clearer constantly electrically detects the thickness of the running yarn. With respect to the thickness of this thread and its change, the allowable value of the size of the thickness and the allowable value of the length that allows the length to continue the thickness are set in advance,
If the thread is extremely thick or thin, or if the thread continues to have a certain thickness (thinness) for a long time, it is detected as a defective thread thickness unevenness (slab). Each weight is equipped with a thread cutter that cuts the thread when a slab is detected by the yarn clearer. This state is called slab thread breakage. When the slab yarn breaks, the yarn traveling stops and waits for the yarn splicer to come around. As shown in Table 1, the status at this time is a slab thread breakage status in which the yarn traveling signal = OFF and the abnormality warning signal = ON. If the yarn splicing machine succeeds in succeeding the yarn, the yarn traveling is restarted. As described above, the slab thread breakage is a thread that the weight recognizes by itself and cut the thread, so that the thread can be automatically recovered without intervention.

Natural yarn breakage may occur in addition to the slab yarn breakage. Natural yarn breakage means that the yarn is not cut actively according to the detection result of the yarn clearer, but the yarn is broken naturally.For example, nozzle clogging when the nozzle is clogged and the yarn does not come out, etc. Caused by a cause. The status of natural yarn breakage is that the yarn running signal = OFF and the abnormality warning signal = OFF. In addition, when a yarn splicing error occurs in the yarn splicing machine and automatic recovery is not possible, the slab yarn breakage status is changed to the natural yarn breakage status.

Thread traveling signal = ON, abnormality warning signal = OFF
The full pipe status indicates that the thread has rolled up and is waiting for full pipe = doffing.

The abnormal warning signal forming the natural thread breakage status or the full thread status shows some abnormal warning. Then, when an abnormality warning signal is output, a red abnormality warning member called a red flag jumps out from the panel surface of the weight in order to prompt the operator to perform processing. The meaning of jumping out of the red flag is the original natural thread breakage = nozzle clogging, full pipe,
It is one of the yarn splicing mistakes of the yarn splicing machine, but it cannot be said that the full pipe is abnormal.Therefore, in order to distinguish this in detail, the full pipe lamp lights up when the red flag pops out when the pipe is full. . In either case, the operator pushes the red flag back to the original position after making simple adjustments such as clearing the nozzle clogging and making yarn splicing easier. The weight recognizes the pushing of the red flag and resets the error warning signal.

On the other hand, a moving carriage that automatically performs doffing and yarn splicing runs along a row of weights. This moving carriage also recognizes the red flag and full lamp. The moving carriage stops at the position of the weight where the yarn traveling is stopped due to the slab yarn breakage and performs yarn splicing, but even when the yarn traveling is stopped, it passes through the weight when the natural yarn breakage occurs. At this time, the moving carriage determines whether or not the yarn is broken naturally by jumping out the red flag. In the case of a full pipe, even if the red flag is popping out, the full lamp is recognized and stopped at the position of the weight to doff.

The conventional red flag and abnormality warning signal require the operator to correct the condition of natural yarn breakage or the condition where yarn cannot be spliced by the yarn splicing machine. As a result, it is possible to quickly perform an artificial treatment when the weight cannot automatically return.

[0011]

By the way, even if yarn breakage occurs many times within a short time, if the yarn is spliced each time, spinning can be continued and the production efficiency can be maintained as it is. However, the frequent occurrence of yarn breakage means that there is some abnormality that causes continuous yarn breakage, and that a yarn with many yarn splice points is completed. Therefore, the high frequency of thread breakage is a problem in terms of mechanical management of the weight and in terms of thread quality.

[0012] In recent years, it has been important to detect unevenness in the cycle of the yarn for spinning machine management. It has been known that the unevenness of the cycle of the yarn is mainly caused by a defect of the top roller, the bottom roller, etc., whereas the conventional yarn thickness unevenness is a random change with respect to the yarn traveling distance, A thick part or a thin part appears in the cycle. The variation in the thickness of the cycle unevenness is smaller than the variation in the thickness unevenness of the conventional thread, and even if it is not recognizable with the naked eye with the thread alone, the cycle is changed when knitted or woven. However, there are defects such as striped patterns that are visible to the naked eye due to overlapping. It is not possible to manage the cycle unevenness and improve the yarn quality only by the conventional management of the yarn thickness unevenness.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a spinning machine management system capable of operating a weight based on yarn quality.

[0014]

In order to achieve the above-mentioned object, the present invention detects the cycle unevenness of spun yarn at each spindle of a spinning machine, and when the cycle unevenness exceeds a predetermined reference, or for a predetermined time. The weight is forcibly stopped when the number of thread breaks in the inner thread exceeds a predetermined number.

[0015]

With the above structure, the weight is forcibly stopped when the cycle irregularity of the spun yarn exceeding the predetermined reference is detected or when the number of yarn breaks exceeds the predetermined number within the predetermined time. Therefore, the yarn quality is improved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, the spinning machine 1 is provided with a large number of spinning units (weights) 31 arranged in a straight line, and an analyzing device 3 is provided at one end thereof. In the figure, the weight is omitted on the right side of the alternate long and short dash line. Each of the weights 31 is provided with a draft device 33 for supplying a roving yarn or a sliver 32, and a spinning nozzle 34 for processing the roving yarn or the sliver 32 into a yarn 38 and feeding the yarn 38. Below the spinning nozzle 34, a delivery roller 35, A slack tube 36 and a yarn clearer (slab catcher) 37 are sequentially provided. The yarn clearer 37 functions to detect the quality of the yarn and cut the yarn when the yarn is defective (slab). Yarn clearer 37
A winding device 4 for winding the yarn 38 around the bobbin 39 is provided below
0 is provided. Each weight 31 is provided with an abnormality warning member 41 that operates in response to an abnormality warning signal and a full-tube lamp 42 that indicates that the bobbin 39 is full.
The abnormality warning member 41 is a member having a red protrusion as shown in FIG. 2, and is protruded from the surface of the weight 31 during operation, and is therefore called a red flag 41.

The spinning machine 1 is provided with a work carriage 43 which faces the space in which the yarn 38 between the yarn clearer 37 and the winding device 40 should travel and which reciprocates along the row of the weights 31 from behind. . On the work carriage 43, the full bobbin 39 is removed and sent to the outside of the system, and a new empty paper tube is taken up by the winding device 4
Doffing device 44 for feeding to 0, and splicing device 4 for splicing yarn
5 and a control device 46 for controlling these are mounted. The work carriage 43 performs a necessary operation by stopping at the position of the thread 31 with a thread break or a full pipe during the reciprocating movement.

Although not shown, each weight 31 is provided with a spectrum analyzer for frequency-analyzing the electric signal of the yarn thickness during traveling which is constantly detected by the yarn clearer 37. The spectrum analyzer frequency-analyzes the thickness based on a change in thickness over a certain period of time, and extracts various frequency components. A graph G shown in FIG. 3 shows this analysis result in a frequency characteristic graph. The frequency forming the peak in the graph G is the frequency of the period unevenness. Here, FIG. 3 shows details of the draft device 33 of FIG. The draft device 33 is composed of a top roller 33a, a bottom roller 33b, and the like that rotate while sandwiching the roving or the sliver 32 and supply the spinning nozzle 34 with the sliver.

With respect to each weight 31, the analysis device 3 detects that a thread is running (thread running), a slab is found and the thread is cut (slab break), and the thread is broken due to a cause other than the slab (red flag break). The number of thread breaks such as slab breaks and red flag breaks is counted by grasping the condition such as when the pipes are full (full pipe). The analysis result of the spectrum analyzer is also sent to the analysis device 3.

The analyzing device 3 is preset with a cycle unevenness reference value given to cycle unevenness of various frequencies and a thread breakage frequency reference value given to the thread breakage frequency. The analysis device 3 also has an operation panel 61 whose details are shown in FIG. On the operation panel 61, an LED 62 that lights up when the cycle unevenness is equal to or greater than the reference value, an LED 63 that indicates that the cause is the top roller 33a, an LED 64 that indicates that the bottom roller 33b is the cause, and an LED 65 that indicates another cause. , 66 are arranged, and display lamps 67 indicating the weights causing the respective causes are arranged according to the number of weights.

As shown in FIG. 5, a centralized control device 2 for centrally controlling these spinning machines is composed of a personal computer having a display device 5. The centralized management device 2 is connected to the analysis device 3 of each spinning machine 1 by a common communication line 4.

Next, the operation of the embodiment will be described.

The analysis device 3 classifies the analysis result of the spectrum analyzer into the cycle unevenness caused by the top roller, the cycle unevenness caused by the bottom roller, and the cycle unevenness other than that, and the magnitude of each cycle unevenness is a reference value for the cycle unevenness. Compare with. If any of the cycle irregularities exceeds the reference value, the weight is forcibly stopped and an abnormality warning signal is generated. A red flag pops out when an abnormal warning signal is generated.

The analysis device 3 also counts the number of yarn breakages and compares it with the yarn breakage count reference value. When the number of times of thread breakage exceeds the number of times of thread breakage reference value, the weight is forcibly stopped and an abnormality warning signal is generated. A red flag pops out when an abnormal warning signal is generated.

In the present invention, when the red flag is popping out, there are five kinds of meanings: nozzle clogging, yarn splicing error, full pipe, cycle irregularity, and number of yarn splicing.

As in the conventional case, the full lamp 42 is turned on when the pipe is full. However, in the present invention, when the weight is forcibly stopped, the display lamp 67 blinks at intervals of 4 seconds. Further, the abnormality warning signal is output as a pulse signal every 1 second. In case of natural thread breakage, the abnormal warning signal is reset immediately after recognizing the pushing of the red flag, but when the weight is forcibly stopped, it will not be reset if pushing is not continued for a predetermined time, and at least 1 red flag is pushed. It will pop out again in a few seconds. Here, it is necessary to push for 4 seconds or more, and when the operator pushes for 4 seconds or more, the abnormality warning signal is reset. Further, after the operator has taken some action and restarted spinning, when the red flag jumps out again, all the indicator lamps 67 are divided into two groups and alternately blink, as the action is inappropriate, as shown in FIG. . In FIG. 7, four display lamps 67 are separately painted in white and black. Black indicator lamp 67 lights up, white indicator lamp 6
When 7 is turned off, this is reversed at short intervals.

As described above, since the method for resetting the red flag is different when the weight forced stop is abnormal, the operator can recognize that it is different from natural thread breakage or the like.

Next, another embodiment of the present invention will be described.

The yarn evenness can be obtained from the yarn thickness detection signal from the yarn clearer 37. The uniformity is a standard deviation of the change in whether the change in thread thickness is large or small. Since the unevenness of the cycle represents a periodic change, the asymmetry represents the magnitude of a change without a cycle, so a reference value is also set for the asymmetry, and when the asymmetry is higher than the reference value, the weight Forced stop and generation of error warning signal.

Further, as shown in FIG. 4, a yarn defect classification table is set in advance, and only when a yarn defect classified into a specific range (for example, a shaded portion) comes, or more than a predetermined number. You can also cut the thread only when. In the classification table of FIG. 4, the vertical axis represents the size (%) of thread unevenness at appropriate intervals,
The length (cm) of yarn unevenness is taken at appropriate intervals on the horizontal axis, and the number of occurrences of yarn unevenness that falls within the range is counted. For example, looking at the lowermost cell in the second row from the left of the classification table, it can be seen that there are 123 thread irregularities having a size of 80 to 130% and a length of 1 to 2 cm.

[0032]

The present invention exhibits the following excellent effects.

(1) When the cycle irregularity exceeds a predetermined standard, the weight is forcibly stopped and an abnormality warning signal is generated, so that the operator can immediately inspect and improve the draft device. As a result, the unevenness of the cycle is eliminated, and it becomes possible to stably produce high-quality yarns that have no defects when formed into a woven fabric.

(2) The operator can inspect and improve the weight even when the frequency of thread breakage is high. As a result, it becomes possible to stably produce a yarn with little yarn splicing.

(3) Since the abnormality warnings related to the yarn quality such as the cycle irregularity and the frequency of yarn breakage are superimposed on the conventional abnormality warning signal, it is not necessary to provide a new abnormality signal line or abnormality warning member, and it is simple. is there.

[Brief description of drawings]

FIG. 1 is a side view of a spinning machine showing an embodiment of the present invention.

FIG. 2 is a perspective view of an abnormality warning member (red flag).

FIG. 3 is a schematic explanatory diagram showing a state of a draft device and frequency analysis.

FIG. 4 is a schematic explanatory diagram showing a yarn defect classification table.

FIG. 5 is an overall block diagram of a spinning machine management system.

FIG. 6 is a front view showing an operation panel of the analyzer.

FIG. 7 is a front view showing an operation panel of the analyzer.

[Explanation of symbols]

 1 Spinning machine 31 Weight 36 Yarn clearer 41 Abnormality warning member (red flag)

Claims (1)

[Claims] 1. When the cycle unevenness of the spun yarn is detected by each weight of the spinning machine and the cycle unevenness exceeds a predetermined standard, or
A management system for a spinning machine, wherein the weight is forcibly stopped when the number of yarn breakages within a predetermined time exceeds a predetermined number.