JPH1121727A - Traverse angle monitoring apparatus for multiple twister - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately determine and monitor a traverse angle by providing a 2nd motor for traverse driving use separately from the 1st motor for driving a spindle. SOLUTION: Preset values of twist number, etc., are inputted into a control box 16 and disturb width (%) and disturb period (sec) are inputted into a 2nd inverter 17 to perform the necessary double twisting and winding operations. The traverse angle important for forming a wound package P is monitored by a traverse angle monitoring apparatus 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traverse angle monitoring device for a multiple twisting machine provided with a second motor for driving a traverse separately from a first motor for driving a spindle.

[0002]

2. Description of the Related Art A double twisting machine, which is a typical example of a multiple twisting machine, attaches a yarn unwound from a yarn feeding package to a spindle rotating at a high speed and appropriately applies tension to the spindle by a tensioning device. Twisting is applied while ballooning with a rotating disk, and the twisted yarn is sent to a traverse device for traversing with a feed roller, and the traversed yarn is wound and wound on a bobbin that is in rolling contact with a rotating winding drum. Package.

[0003] There are two types of drive systems for this double twisting machine. In the first type, the driving force from one motor is decelerated while being appropriately branched by a belt, and the spindle, the feed roller, the winding drum, and the traverse device are driven. The second type is a first motor, a spindle,
Although the feed roller and the winding drum are driven, the traverse device is driven by a separate second motor.

In the second type, when an induction motor that rotates according to the output frequency from the inverter is used as the second motor, acceleration and deceleration can be performed freely. Periodically switch between
A ribbon break can be performed by a disturbance function that drives the traverse device at a traverse speed that is periodically changed. The disturbance is determined by the disturbance width (%) and the disturbance period (sec), and these set values can be directly input to the inverter.

In the second type of double twisting machine, since the traverse operation of the traverse device and the rotation operation of the winding drum are performed by separate motors, the twill angle θ determined by the following equation (1) is fixed. In order to achieve this, it is necessary to perform control to keep the winding drum peripheral speed and the traverse speed in a constant relationship. θ = tan ⁻¹ (number of traverses × traverse width × 2) / yarn speed (1) Here, the yarn speed matches the circumferential speed of the winding drum, and the number of traverses is proportional to the traverse speed.

[0006]

In the double twisting machine, the number of twists, the twist direction, the twill angle, and the like are set. However, if the twill angle deviates greatly from the set values, the twill drops during winding. . For this reason, it is necessary to calculate the helix angle and monitor whether or not the angle is deviated from the setting. However, since the traverse speed fluctuates periodically due to the disturb function, the helix angle determined by the traverse speed also fluctuates periodically, so that the average value cannot be determined.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a multi-twisted yarn capable of accurately calculating and monitoring a twill angle despite the disturb of a traverse device. To provide a twill angle monitoring device in a machine.

[0008]

According to the first aspect of the present invention,
A first motor for driving a spindle, a second motor for driving the traverse device at a periodically varied traverse speed, detection means for detecting the traverse speed fluctuating in the traverse device, and the detected traverse speed And a calculating means for calculating the traverse angle by calculating an average speed from the traverse angle in the multiple twisting machine.

According to a second aspect of the present invention, in the first aspect of the present invention, the calculating means includes a capturing means for capturing the detected periodic variation of the traverse speed every one cycle.

According to a third aspect of the present invention, in the second aspect of the present invention, the one-period capture is performed from a point in time when the upper limit or the lower limit is exceeded to a point in time when the next upper limit or the lower limit is passed. It is.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a device block diagram including a twill angle monitoring device of a double twisting machine according to the present embodiment.

In FIG. 1, a double twisting machine 1 includes a first motor 11, a spindle drive system 13 driven by the first motor 11, and a winding device drive system 14 also driven by the first motor 11. , A second motor 12, a traverse device drive system 15 driven by the second motor 12, and a control box 16 as main devices.

The traverse angle monitoring device 2 includes a traverse speed detection sensor (detection means) 3 provided for the traverse device drive system 15, a microcomputer 4 in the control box 16 (calculation means, capture means), It comprises a monitor (monitoring means) 5 connected to the microcomputer 4.

The first motor 11 is an induction motor, and is driven at a rotation speed determined by an output frequency from a first inverter 17a in the control box 16. The first motor 11 runs a tangential belt 23 directly wound around the first pulley 22. When the shaft portion of the spindles 24 of the double twisted portions arranged in a large number of rows comes into contact with the tangential belt 23, the spindle 24 is rotationally driven to perform double twisting of the yarn. In addition, the double-twisted yarn portion is arranged in each of the reciprocating portions of the straight traveling portion of the tangential belt 23, thereby forming the R-row double-twisted portion and the L-row double-twisted yarn portion.

The second row pulleys 25R and 25L which receive the divergence of power from the tangential belt 23 drive the R-row winding device and the L-row winding device. The second pulley 25R,
The outline of the drive mechanism after 25L is as follows. A drive shaft 29a of a feed roller 29 that feeds a yarn from a double twisted yarn portion through a gear speed reducer 26, a belt transmission 27, a timing belt and a timing pulley group 28, and a winding shaft. Tori Package P
Is driven by a drive shaft 30a of the winding drum 30 to which the roller comes in contact.

The second motor 12 is an induction motor, and is driven at a rotation speed determined by an output frequency from a second inverter 17b in the control box 16. The inverter 17b has a disturbance function of periodically switching the rotation speed of the induction motor between an upper limit value and a lower limit value, and driving the traverse device at a traverse speed that is periodically changed. The second motor 12 drives the R-side traverse device 32R and the L-side traverse device 32R via the timing belt and the timing pulley group 31. Traverse device 32
Each of R and 32L has a structure in which a traverse rod 34 in which a yarn guide 33 for hanging a yarn from a feed roller 29 is arranged in a reciprocating motion (traverse) by a cam box 35.

With respect to the drive shaft 30a of the winding drum 30,
A feedback sensor 36, a drum sensor 37,
A fixed length sensor 38 is provided. The voltage output of the feedback sensor 36 is converted to a frequency by the converter 39,
The signal is input to the second inverter 17. In order to perform winding at a constant helix angle, the traverse speed needs to be determined by the above-described equation (1), and the sensor 36 is used as a feedback signal for that. The drum sensor 37 measures the actual peripheral speed of the winding drum, that is, the yarn speed. Further, the fixed length sensor 38 is used for measuring the timing of the full package.

In the above-described double twisting machine 1, when a set value such as the number of twists is input to a control box, and a disturbance width (%) and a disturbance period (sec) are input to the second inverter 17, a required double twisting machine is provided. And take-up. However, the actual twill angle which is important in forming the winding package can be monitored by the twill angle monitoring device 2 described below.

Next, the operation of the traverse angle monitoring device 2 including the sensor 3, the microcomputer 4, and the monitor 5 will be described with reference to FIGS. FIGS. 2 to 4 are flowcharts showing programs incorporated in the ROM in the microcomputer 4.
FIG. 5 is a graph showing the disturbance due to the periodic fluctuation of the traverse speed.

The microcomputer 4 is provided in the traverse drive system 15 and functions by receiving an output of the sensor 3 for detecting a traverse speed. The sensor 3 as a detecting means is a proximity sensor for counting the number of teeth of the timing pulley, but is not limited to this. FIG. 5 shows the state of the disturbance due to the periodic fluctuation of the traverse speed detected by the sensor 3.

First, the flowchart of FIG. 2 shows a preparation procedure before taking in one cycle of data during acceleration and data during deceleration in the traverse speed shown in FIG. This flow is executed by, for example, an interrupt process every 100 ms. In FIG. 2, the flow starts from the confirmation of the previous data (S1). If the data is zero, the previous data is copied (S38), and the flow is terminated to start the next interrupt processing. If is not zero, the flow enters the initial determination of whether the vehicle is accelerating or decelerating (S2 to S
5). If the acceleration / deceleration flag is reset (S2, Y
ES), compare the previous data with the current data (S
3) If the current data is small twice consecutively, a flag is set during deceleration (S4). If the current data is large twice consecutively, a flag is set during acceleration (S5).

After the initial judgment of acceleration or deceleration is completed (S2 to S5), processing when switching is not performed during acceleration to deceleration (S7 to S9) and switching is not performed during deceleration to acceleration. Enter the processing flow at the time (S11-S
13). If the number of data during acceleration exceeds MAX (S7,
YES), the acceleration / deceleration flag is reset (S8), and the data during acceleration is initialized (S9). Number of data during deceleration is M
If it exceeds AX (S11, YES), the acceleration / deceleration flag is reset (S12), and the data during deceleration is initialized (S11).
13).

The flowchart of FIG. 3 shows the procedure for completing the preparation of FIG. 2 and actually taking in one cycle of data during acceleration and data during deceleration. First, it is checked whether both of the acceleration / deceleration flags are on (S21). If both are on (S21, YES), the acceleration / deceleration flag is reset (S36), and one of the acceleration / deceleration flags is turned on. (S21, NO), the data during acceleration is taken in (S23-
S28) or capture of data during deceleration (S30 to S3)
Perform 5).

After confirming the acceleration flag (S23,
YES), it is determined whether to switch from accelerating to decelerating (S24 to S26). If the first value of the data during acceleration (a1 in FIG. 5) has been input (S24, YES), then the first value a1 + α (c in FIG. 5) which is the lower limit value of the data during acceleration.
It is determined whether 1) is smaller than the current data (S25), and it is also determined whether the previous data −α is larger than the current data (S26). Both judgments of S25 and S26 are YE
If it is S, a decision is made at b1 in FIG. 5 to switch from accelerating to decelerating. In step S25, the minimum value a1 is set to + α.
Is corrected because it is not determined that switching has been performed during deceleration immediately after switching during acceleration due to pulsation of the actual traverse speed or the like. In addition, the correction of -α to the previous data in S26 is to prevent the determination from becoming inaccurate near point a6 (upper limit) where the movement of the rotational speed data becomes slow, and to clearly turn off during deceleration. This is because it is determined that switching has been performed after switching. That is, by performing the correction as in S25 and S26, it is possible to make an accurate switching determination even when the actual traverse speed is pulsating or the movement is slow. If it is determined in S24 to S26 that the switching from acceleration to deceleration is performed, a flag is set during deceleration (S27), the data during acceleration is copied to the acceleration data for calculation, and the data during acceleration is initialized. (S28).

Since the flag is set during deceleration in S27, the flow enters a deceleration flow (S30), and a determination is made as to switching from deceleration to acceleration (S31 to S33). If the first value of the data during deceleration (b1 in FIG. 5) has been input (S31, YES), then the first value b1-α (d1 in FIG. 5), which is the upper limit value of the data during deceleration, is the current value. It is determined whether it is smaller than the data (S32), and the previous data + α
Is smaller than the current data (S33). S3
If the determinations of 2 and S33 are both YES, the determination of switching from deceleration to acceleration is made at point a1 in FIG.
The correction as in S32 and S33 is performed for the same reason as the correction in the flow during acceleration. If it is determined in S31 to S33 that the mode is switched from deceleration to acceleration, a flag is set during acceleration (S3).
4), copy the data during deceleration to data for deceleration for calculation,
The data during deceleration is initialized (S35).

The current data (b1 or a1) is copied to the data during acceleration or deceleration (S37), and the current data (b1 or a1) is copied to the previous data for comparison in the subsequent switching determination. To end the flow (S38). When the above flow is repeated at 100 msec, data during acceleration from a1 to a6 in FIG.
One cycle of the periodic variation of the traverse speed is taken in as in the data during deceleration from to b6. That is, the flow of FIG. 3 is incorporated in the microcomputer 4 of FIG. 1 to constitute a capturing means for capturing the periodic fluctuation of the traverse speed for each cycle. In addition, the rotation speed data of the traverse speed is compared with the previous rotation speed data. Acceleration / deceleration switching determination means (S2
6, S33) and a calculation means including correction means (S25, S26, S32, S33) for increasing or decreasing the predetermined value α to the previous rotation speed data. Based on this one-cycle acquisition, the average value of data during acceleration from a1 to a6 and b1 to
By further averaging the average value of the data during deceleration up to b6, the average value of the traverse speed can be calculated. Also,
The illustrated disturbance period and disturbance width can also be calculated.

FIG. 4 shows a calculation flow of the fetched data. This flow is executed, for example, by interruption every one second. First, the flow starts by determining whether the data initialization flag is on (S40). If the flag is ON (S40, YES), the monitor data and the internal processing data are initialized (S41). Next, it is determined whether the data is zero (S42). If the data is zero (S42,
YES), the current values of the rotation speed and the twill angle are set to zero (S
43) If the data is not zero (S42, NO), the current values of the rotation speed and the helix angle are calculated (S44). Next, it is determined whether the data calculation during acceleration is OK (S45), and it is determined whether the data calculation during deceleration is OK (S46). If both are OK (S45, YES and S46, YES),
The accelerating data is summed to determine the maximum value of the data (S4
7) The data during deceleration are summed up to determine the minimum value of the data (S49). The average value of the twill angle is calculated based on these data. At this time, the average value of the traverse rotation speed (traverse speed), the lower limit value of the traverse rotation speed, the upper limit value of the traverse rotation speed, and the disturb period are also calculated. And
It is displayed on the monitor 5 of FIG. 1 as necessary. Here, the average value of the twill angle can be calculated by the above-described formula (1), the number of traverses is obtained from the traverse speed (traverse speed), and the yarn speed is a drum sensor for detecting the speed of the winding drum. 37. As described above, the flow of FIG. 4 is incorporated in the microcomputer 4 of FIG.
Computing means for computing the twill angle is configured.

The average value of the twill angle thus obtained is
It is displayed on the monitor 5 of FIG. As a result, the operator can monitor an accurate and easy-to-view twill angle based on the average value of the actual traverse speed.

[0029]

According to the first aspect of the present invention, the detecting means for detecting the traverse speed fluctuating in the traverse device and the calculating means for calculating the average speed from the detected traverse speed and calculating the traverse angle are provided. As a result, it is possible to monitor an accurate twill angle reflecting actual driving.
For example, a disturb period in the inverter is input to the microcomputer, and the traverse speed input during this period is averaged to calculate the traverse angle. Without being affected by the slip between the inverter and the motor,
An accurate twill angle corresponding to an actual movement can be calculated.

According to the second aspect of the present invention, the calculation means includes calculation means for calculating the average value of the traverse speed by taking in the detected traverse speed for each period of the periodic fluctuation. The twill angle can be calculated for each cycle, and the twill angle can be calculated accurately and in real time. For example, the average of the traverse speed can be obtained by averaging and taking in data of multiple cycles, but if you try to obtain an accurate average value of the traverse speed, the number of cycles will increase and the real-time performance will be impaired become.

According to the third aspect of the present invention, the calculating means includes a switch determining means for comparing the rotational speed data of the traverse speed with the previous rotational speed data to determine whether to switch the acceleration / deceleration. The means includes a correction means for performing a correction for increasing or decreasing the previous rotation speed data by a predetermined amount, so that even when the actual traverse speed movement is slow or pulsating, accurate acceleration / deceleration switching determination is always performed. The rotation speed data of the traverse speed can be accurately taken in every one cycle.

[Brief description of the drawings]

FIG. 1 is a device block diagram of a twill angle monitoring device of a multiple twisting machine according to an embodiment.

FIG. 2 is a flowchart of the traverse angle monitoring device.

FIG. 3 is a flowchart of the traverse angle monitoring device.

FIG. 4 is a flowchart of the twill angle monitoring device.

FIG. 5 is a graph showing a periodic variation of a traverse speed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Double twisting machine (multiple twisting machine) 2 Twill angle monitoring device 3 Sensor (detection means) 4 Microcomputer (calculation means, capture means, switching judgment means, correction means) 11 1st motor 12 2nd motor 24 spindle 32R, 32L Traverse device a6 Upper limit b6 Lower limit a1 to a6 to b1 to b6 One cycle α Predetermined value

Claims (3)

[Claims] 1. A first motor for driving a spindle, a second motor for driving a traverse device at a traverse speed that is periodically changed, detection means for detecting the traverse speed fluctuated in the traverse device, Calculating means for calculating an average speed from the calculated traverse speed to calculate a twill angle. 2. The twill angle monitoring device in a multi-twisting machine according to claim 1, wherein said calculating means includes a take-in means for taking in the detected periodic variation of the traverse speed every one cycle. 3. The computer according to claim 1, wherein the calculating unit includes a switching determination unit that compares the rotation speed data of the traverse speed with a previous rotation speed data to determine whether to switch the acceleration / deceleration. 3. The traverse angle monitoring device in a multi-twisting machine according to claim 2, further comprising a correction unit for performing a correction for increasing or decreasing the numerical data by a predetermined amount.