JP2586281B2 - Spinning machine management system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A large number of weights are provided in a spinning machine, and a signal for informing the operating state of each weight is sent to a control device of the spinning machine. The operating state is represented by a 2-bit code by combining a yarn traveling signal indicating that the yarn is traveling normally and an abnormality warning signal indicating that an abnormality such as a natural yarn break has occurred. Expressed as status (Table 1). By this combination, the operating state of each weight is divided into one of the status of normal operation, the status of slab yarn breakage, the status of natural yarn breakage, and the status of full tube. In Table 1, the yarn running signal is marked as FW, and the abnormality warning signal is marked with a red flag.

[0003]

[Table 1]

[0004] Here, the fact that there is a distinction in the state of thread breakage will be described.

First, each weight is provided with a device called a yarn clearer. The yarn clearer constantly detects the thickness of the running yarn electrically. With respect to the thickness of the thread and its change, an allowable value of the size of the thread and an allowable value of the length that allows the length of the thickness to be continued are set in advance,
If the yarn is extremely thick or thin, or if the thickness (thinness) continues for a long time, it is detected as a yarn thickness unevenness defect (slab). Each weight is equipped with a thread cutter, and cuts the thread when a slab is detected by the yarn clearer. This state is called slab yarn breakage. When the slab yarn breaks, the yarn traveling stops and waits for the yarn splicer to make a round. The status at this time is a slab yarn breakage status in which the yarn running signal = OFF and the abnormality warning signal = ON, as shown in Table 1. If the yarn splicer succeeds in splicing the yarn, the yarn running is resumed. In this way, the slab thread break is the one in which the weight recognizes itself and cuts the thread, so that the slab thread break can be automatically returned without human intervention.

[0006] In addition to slab yarn breakage, natural yarn breakage may occur. A spontaneous yarn breakage means that the yarn cuts spontaneously instead of actively cutting according to the detection result of the yarn clearer.For example, a nozzle clogging when the nozzle clogs and the yarn no longer comes out, etc. It happens due to. The status of spontaneous yarn breakage is that the yarn running signal is OFF and the abnormality warning signal is OFF. In addition, when a splicing error occurs in the above-described splicing machine and automatic recovery cannot be performed, the status is shifted from the slab yarn breakage status to the natural yarn breakage status.

[0007] Thread running signal = ON, abnormality warning signal = OFF
The full-package status indicates that the yarn is wound up and the full-package is waiting for doffing.

[0008] The abnormality warning signal that forms the status of the natural thread breakage or the full status indicates any abnormality warning. When an abnormality warning signal is output, a red abnormality warning member called a red flag pops out of the panel surface of the weight in order to prompt the operator to perform processing. The meaning of the red flag jumping out is that the natural thread breaks = nozzle clogged, full,
It is one of the piecing errors of the piecing machine, but it is not considered abnormal because the full package is not abnormal, so in order to distinguish this in detail, the full lamp is lit when the red flag pops out . In either case, the operator pushes the red flag back to the original position after simple adjustments such as clearing the nozzle clogging and facilitating piecing. The weight recognizes the pushing of the red flag and resets the abnormality warning signal.

[0009] On the other hand, a movable carriage that automatically performs doffing and piecing along a row of weights is running. This mobile trolley also recognizes the red flag and the full lamp. The moving carriage stops at the position of the weight at which the yarn running is stopped due to the slab yarn breakage, and performs splicing. However, even when the yarn running is stopped, it passes through the weight at the time of natural yarn breakage. At this time, the movable trolley determines whether or not the thread is broken by the red flag jumping out. In the case of a full-filled lamp, even if the red flag is protruding, the full-filled lamp is recognized and stopped at the position of the weight to doff.

The conventional red flag and abnormality warning signal request that the operator correct the state of spontaneous yarn breakage or the state in which the 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 in a short time, spinning can be continued each time, and spinning can be continued, and production efficiency can be maintained as it is. However, frequent breakage of the yarn means that there is something abnormal that causes continuous breakage of the yarn, and that a yarn having many spliced portions is produced. Therefore, the high frequency of yarn breakage is a problem both in terms of mechanical management of the weight and in terms of yarn quality.

[0012] In recent years, it has become important for spinning machine management to detect yarn cycle unevenness. It has been known that the unevenness of the yarn cycle is mainly caused by defects of the top roller, the bottom roller, etc., whereas the conventional uneven thickness of the yarn is a random change with respect to the yarn traveling distance, Thick or thin portions appear in the cycle. The change in the thickness of the periodic unevenness is smaller than the change in the thickness of the conventional uneven thickness of the yarn. The defects such as stripes which are visually overlapped and visible to the naked eye appear. The conventional uneven thickness control alone cannot control the periodic unevenness and cannot improve the yarn quality.

It is an object of the present invention to solve the above-mentioned problems and to provide a spinning machine management system capable of operating a weight with a guide to yarn quality.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for detecting a spontaneous yarn breakage at each spindle of a spinning machine.
An abnormal warning signal is generated.On the other hand, when the periodic unevenness of the spun yarn is detected and the periodic unevenness exceeds a predetermined reference, or when the yarn breakage within a predetermined time exceeds a predetermined number of times, the weight is removed. Forcibly stop and generate an abnormal warning signal
The alarm warning signal, and reset the abnormality warning signal.
The cutting method is different from the case of natural thread breakage .

[0015]

According to the above construction, the weight is detected as a spontaneous yarn breakage.
When this occurs, an abnormality warning signal is generated. On the other hand, when a period unevenness exceeding a predetermined standard of the spun yarn is detected, or
When the number of thread breaks within a predetermined time exceeds a predetermined number, the weight is forcibly stopped and an abnormality warning signal is generated. Place of forced stop
How to reset the abnormal warning signal between
Abnormally misjudging the forced stop of the weight as a spontaneous thread breakage due to different laws
Even if you try to reset the warning signal, the abnormal
Not set.

[0016]

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

As shown in FIG. 1, a large number of spinning units (weights) 31 are arranged in a straight line in the spinning machine 1, 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 weight 31 is provided with a draft device 33 for supplying a roving or sliver 32, and a spinning nozzle 34 for processing the roving or sliver 32 into a yarn 38 and feeding the yarn 38, and a delivery roller 35 below the spinning nozzle 34; A slack tube 36 and a yarn clearer (slab catcher) 37 are provided in this order. The yarn clearer 37 detects the quality of the yarn and functions to cut the yarn if the yarn is defective (slab). Yarn clearer 37
The winding device 4 for winding the yarn 38 around the bobbin 39
0 is provided. Each weight 31 is provided with an abnormality warning member 41 that operates according to the abnormality warning signal and a full 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 protrudes 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 where the yarn 38 should travel between the yarn clearer 37 and the winding device 40 from behind and reciprocates along the row of the weights 31. . The work bogie 43 has the full bobbin 39 removed and sent out of the system, and a new empty paper tube is taken up by the winding device 4.
Doffing device 44 for supplying the piecing device 0 and a piecing device 4 for piecing
5 and a control device 46 for performing these controls are mounted. The work vehicle 43 stops at the position of the thread 31 or the full weight 31 during the reciprocating movement and performs necessary operations.

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

For each weight 31, the analysis device 3 finds that the yarn is running (yarn running), finds a slab and cuts the yarn (slab break), and breaks the yarn for a cause other than the slab (red flag break). , The state of fullness (fullness) and the like are grasped, and the number of thread breaks such as slab breaks, red flag breaks and the like are counted. The analysis result of the spectrum analyzer is also sent to the analyzer 3.

In the analyzing device 3, a reference value for the cycle unevenness given for the cycle unevenness of various frequencies and a reference value for the number of thread breaks given for the number of thread breaks are preset. The analyzer 3 has an operation panel 61 whose details are shown in FIG. The operation panel 61 has an LED 62 that is turned on when the period unevenness is equal to or more than the reference value, an LED 63 that indicates that the cause is the top roller 33a, an LED 64 that indicates that the cause is the bottom roller 33b, and an LED 65 that indicates that the cause is other. , 66 are arranged, and display lamps 67 indicating the weights of the causes are arranged in accordance with the number of weights.

As shown in FIG. 5, a central control device 2 for centrally controlling these spinning machines is constituted by a personal computer having a display device 5. The central control 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 analyzer 3 classifies the results of analysis by the spectrum analyzer into cycle irregularities caused by the top roller, cycle irregularities caused by the bottom roller, other cycle irregularities, and the like. Compare with If any of the period irregularities exceeds the reference value, the weight is forcibly stopped and an abnormality warning signal is generated. The red flag pops out due to the occurrence of the abnormality warning signal.

The analyzer 3 counts the number of times of thread breakage and compares it with a reference value of the number of times of thread breakage. When the number of times of thread breakage exceeds the reference value of the number of times of thread breakage, the weight is forcibly stopped and an abnormality warning signal is generated. The red flag pops out due to the occurrence of the abnormality warning signal.

In the present invention, when the red flag is protruding, there are five meanings, namely, nozzle clogging, yarn splicing error, full tube, periodic unevenness, and the number of splicing times.

When the full package is full, the full lamp 42 is turned on as in the conventional case. However, in the present invention, when the weight is forcibly stopped, the display lamp 67 blinks at intervals of 4 seconds. Further, an abnormality warning signal is output as a pulse signal every one second. In the event of a natural thread break, the abnormality warning signal is reset immediately upon recognition of the red flag being pushed, but in the case of a forced stop of the weight, it is not reset unless the pushing is continued for a predetermined time, and the pushed red flag is at least one. After a second, it jumps out again. Here, it is necessary to depress for more than 4 seconds, and when the operator depresses for more than 4 seconds, the abnormality warning signal is reset. Also, when the red flag jumps out again after the operator has taken some action and restarted spinning, all the display lamps 67 are divided into two groups and alternately flash as shown in FIG. 7 when the action is inappropriate. . In FIG. 7, four display lamps 67 are painted in white and black respectively. Black indicator lamp 67 lights up, white indicator lamp 6
If 7 is turned off, it is inverted at short intervals.

As described above, when the weight is forcibly stopped, the method of resetting the red flag is different, so that the operator can recognize that the reset is different from a spontaneous thread breakage or the like.

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

The yarn uniformity can be obtained from the yarn thickness detection signal from the yarn clearer 37. The degree of uniformity indicates whether the change in the thickness of the yarn is large or small by the standard deviation of the change. Periodic unevenness represents a periodic change, whereas the uniformity represents the magnitude of a change without a period.Therefore, a reference value is set for the uniformity, and when the uniformity is larger than the reference value, the weight The forced stop and the generation of the abnormality warning signal are performed.

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

[0032]

The present invention exhibits the following excellent effects.

(1) If the period 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. This eliminates periodic unevenness and enables stable production of high-quality yarn that does not have defects when woven.

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

(3) Since an abnormal warning relating to yarn quality such as uneven cycle and frequency of yarn breakage is superimposed on a conventional abnormal warning signal, there is no need to provide a new abnormal signal line or an abnormal warning member, which is simple and simple. is there. If you want to forcibly stop the weight,
When the cycle of the thread is uneven or the thread breaks frequently,
Resuming the operation of the weight without taking any action due to misidentification as a thread break
If you do, there is a problem that defective yarn will continue to be produced
However, according to the present invention, when the weight is forcibly stopped and when the natural thread breaks,
The method of resetting the error warning signal differs between
Therefore, even if the forced stop of the weight is mistaken for
If the rotation does not resume and the defective yarn continues to be produced
Such a problem can be prevented.

[Brief description of the drawings]

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

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

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

FIG. 4 is a schematic explanatory view showing a classification table for yarn defects.

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)

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-91936 (JP, A) JP-A-51-149934 (JP, A) JP-A-61-179330 (JP, A) JP-A-53-1979 86844 (JP, A) JP-A-62-57954 (JP, A) JP-B-47-42854 (JP, B2)

Claims (1)

(57) [Claims] 1. When a natural thread break is detected at each spindle of a spinning machine.
An abnormal warning signal is generated.On the other hand, when the periodic unevenness of the spun yarn is detected and the periodic unevenness exceeds a predetermined reference, or when the yarn breakage within a predetermined time exceeds a predetermined number of times, the weight is removed. Forcibly stop and generate an abnormal warning signal
The alarm warning signal, and reset the abnormality warning signal.
A management system for a spinning machine , wherein a cutting method is different from a case of a natural thread breakage .