JP2002265151A - Long material winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily wind up a long material such as wire stably with a simple construction. SOLUTION: Wire 1 is unwound at a designated speed with a capstan 3. A winding frame 8 is rotated with a motor 9 to wind the wire 1 around the winding frame 8. A dancer-cum-tension detector 7 is provided. A servo loop to maintain a tension constant is provided. A wire tension variation range is judged and a time constant of the servo loop is decreased when tension variation range increases.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for winding a long object such as a wire or a band.

[0002]

2. Description of the Related Art A wire winding device in a wire drawing machine, a stranded wire machine, or the like includes, for example, a wire supply-side rotating body (for example, a capstan) and a wire winding device as disclosed in Japanese Patent Publication No. 7-112884. A take-up rotary body (winding frame), a motor for driving the supply-side rotary body, a motor for driving the take-up rotary body, and a dancer having tension adjustment and tension detection functions. And The motor on the winding side is controlled based on a speed command based on the rotation information of the supply side motor. Also, in order to keep the wire tension constant, the tension detection signal obtained from the dancer and the dancer
An error signal from the reference value indicating the reference position, that is, a deviation signal is created, thereby correcting the speed command.

[0003]

When the method disclosed in the above-mentioned publication is adopted, the wire can be wound with a constant tension ideally. However, when the winding unevenness of the wire with respect to the winding frame becomes large, or at the time of transient driving at the start of winding or at the end of winding, the dancer is greatly displaced, and the winding may not be able to continue stably.

An object of the present invention is to provide a winding device that can stably advance a long object with a relatively simple configuration.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the above-mentioned object, the present invention provides a long-body supply means for supplying a linear or band-shaped long body using a supply-side rotating body. A winding rotator for winding the elongated object; a winding motor for rotating the winding rotator; tension detecting means for detecting a tension of the elongated object; Control means connected to the tension detecting means for controlling the winding motor; and driving means connected between the control means and the winding motor. A tension reference value generating unit that indicates a reference value of tension, an error signal forming unit that forms an error signal indicating a difference between the detected value of the tension detected by the tension detecting unit and the reference value of the tension, The detected tension value is a predetermined value greater than the reference value of the tension. A tension level determining means for determining whether or not the first tension value is smaller than the first tension value and a second tension value which is larger than the reference value of the tension by a predetermined value, based on an output of the error signal forming means. An operation amount for maintaining the tension of the elongated object at the reference value and supplying the operation amount to the driving device, wherein the output of the tension level determination means is the first tension value and the second tension value. The first time constant is obtained in response to the signal indicating that the tension value is between the first tension value and the second tension value. And a manipulated variable creating means formed to have a second time constant smaller than the first time constant in response to the above-mentioned fact. It is related to.

According to a second aspect of the present invention, the control means further determines whether the detected tension value is smaller than a third tension value set smaller than the first tension value. Determining means for determining whether the detected tension value is greater than a fourth tension value that is set to be greater than the second tension value; and determining whether the detected tension value is the third tension value. When a determination result indicating that the tension is smaller than the predetermined value is obtained, a constant operation amount for increasing the tension is generated, and a determination result indicating that the detected tension value is larger than the fourth tension value is obtained. Sometimes it is desirable to have means for generating a constant manipulated variable to reduce the tension. Further, as set forth in claim 3, means for supplying a speed command value of the winding-side motor, and the operation amount creating means (33)
It is desirable to have a calculator (35) for adding or subtracting the speed command value to or from the manipulated variable formed in (1). Further, it is desirable that the means for supplying the speed command value generates a speed command value synchronized with the rotation of the supply-side rotating body. Claim 5
The tension reference value generating means may be configured to gradually change the reference value of the tension so that the tension gradually increases as the winding time elapses. Further, as described in claim 6, the tension detecting means is configured to contact the elongated object between the supply-side rotary member and the winding-side rotary member to apply tension to the elongated object. And a sensor for outputting a tension detection signal detected based on the vertical position of the pressing body.

[0007]

According to the present invention, when the deviation of the detected tension value from the reference tension value does not fall between the first tension value and the second tension value, the time constant is switched to a smaller value. Can be As a result, the response speed of the servo is increased, the tension can be quickly returned between the first and second tension values, and cutting of the elongated object is prevented. Further, overcurrent and overvoltage of the winding-side motor due to abnormal fluctuation of tension can be prevented. Further, according to the invention of claim 2, when the detected tension value becomes smaller than the third tension value and when the detected tension value becomes larger than the fourth tension value, the operation amount becomes a constant value. Fixed. For this reason, a large change in the operation amount does not occur at the time of abnormality such as when the elongated object is cut, and it is possible to prevent overcurrent and overvoltage of the winding motor. According to the third aspect of the present invention, the take-up motor can be controlled by both the feedback control based on the detected tension value and the control based on the speed command, so that the control stability is improved or diversified. be able to. Further, according to the invention of claim 4, it is possible to perform stable winding by synchronizing the supply-side rotating body and the winding-side rotating body. Also,
According to the fifth aspect of the present invention, since the tension is controlled so as to gradually increase, it is possible to perform winding with less loosening. According to the invention of claim 6, tension adjustment and tension detection can be achieved with a simple configuration.

[0008]

Next, an embodiment of the present invention will be described with reference to FIGS.

[0009]

First Embodiment A winding device in a wire drawing machine according to a first embodiment of the present invention shown in FIG. 1 includes a metal wire 1 as a long object and a winding on a supply side for supplying the wire 1. Frame 2 and capstan 3 as supply-side rotating body
And a motor 4 coupled to the capstan 3, an inverter 5 as a driving device of the motor 4, a die or wire drawing part 6, a dancer / tension detector 7, and a winding as a winding-side rotating body. A frame 8, a winding motor 9 coupled to the winding frame 8, an inverter 10 as a driving device for the motor 9, a plurality of rollers 11 to 18 arranged in a path of the wire 1, 19, the control means 20 of the supply-side inverter 5, and the winding-side inverter 10
Control means 21.

The wire 1 is a large-diameter steel wire 1a having a diameter of, for example, 1 cm on the supply side of the wire drawing portion 6, and a small-diameter steel wire 1b having a diameter of 1 mm on the winding side than the wire drawing portion 6. The supply-side reel 2 around which the wire 1 is wound,
The wire 1 is rotatably supported, and is rotated by a supply motor (not shown) so as to send out the wire 1 as needed.
The capstan 3 is driven by the motor 4 and the wire 1
Send out. In order to pull out the wire 1 from the supply side bobbin 2 by the capstan 3 and send it out, the wire 1 is wound around the capstan 3 in an α shape, or the capstan 3 is wound around the pinch roller 3a indicated by a dotted line via the wire 1. Is transferred. The motor 4 is, for example, an AC motor such as an induction motor. In this specific example, the capstan 3, the motor 4, and the inverter 5 constitute a wire 1 supply unit.

The inverter 5 connected to the motor 4 converts a DC voltage of the DC power supply 5a into a sine wave AC voltage of, for example, 50 Hz. When the capstan 3 is rotated at a constant speed, the wire 1 is sent out at a constant linear speed. The supply-side inverter control means 20 generates a frequency command fo for controlling the frequency of the inverter 5, gradually increases the output frequency of the inverter 5 at the start of winding of the wire 1, and increases the output frequency of the inverter 5 at steady winding. The output frequency is maintained constant, and the inverter 5 is controlled so that the output frequency of the inverter 5 is gradually reduced at the end of winding. The rotation speed of the motor 4 is proportional to the output frequency of the inverter 5. In this embodiment, the supply inverter control means 20 is connected by a line 22 to the take-up inverter control means 21. This line 22 functions as a speed command value supply unit for the take-up motor 9.

The wire drawing portion 6 is a well-known one generally called a die portion, and is used to process the large diameter wire 1a into the small diameter wire 1b. The wire drawing section 6 is arranged between the supply-side bobbin 2 and the capstan 3.

The dancer / tension detector 7 includes a cylindrical pressurizing member 7a as a dancer in contact with the wire 1b,
A tension sensor 7b for converting the vertical position of the pressurizing member 7a into an electric signal, a guide means 7c, and a tension spring 7d are arranged between the capstan 3 and the winding frame 8 on the winding side. I have. The wire 1b is connected to the pair of rollers 1
It is bent in an inverted U-shape between 6 and 17, and is in contact with the upper side of the pressing body 7a. The axis of the pressing body 7a is
The pressurizing member 7 a can be moved up and down in the range of the slit 24 because it is inserted into the slit 24 extending in the vertical direction of the support plate 23 as a support. In order to apply tension to the wire 1b, the pressing body 7a is constantly biased upward by a tension spring 7d. When the tension of the wire 1b increases,
The dancer or pressurizing body 7a moves downward, and conversely, when the tension decreases, the pressurizing body 7a moves upward. In this specific example, the strength of the spring 7d is adjusted so that the pressing body 7a is located in the middle of the slit 24 at the time of the optimum tension.

As shown in FIG. 2, the tension sensor 7b, which can also be called a position sensor linked to the pressing body 7a, is, for example, a variable resistor 25, a movable contact 26, and a low-pass filter 2.
And outputs a voltage Vt proportional to the position of the pressing body 7a as a tension detection voltage. The variable resistor 25 is connected between the power supply terminal 28 and the ground, the movable contact 26 is displaced in proportion to the position of the pressurizing member 7a, and a position detection signal accompanied by a short-period vibration shown in FIG. That is, the tension detection signal Vp
Is output. The low-pass filter 27 includes the variable resistor 25
The high frequency component is removed from the output signal Vp of FIG.
(A) outputs a smoothed tension detection signal Vt indicated by a broken line. In this specific example, the tension detection signal Vt has a value inversely proportional to the tension of the wire 1b, and the tension detection value Vt decreases as the tension of the wire 1b increases. The time constant of the low-pass filter 27 is set to be extremely short, for example, 20 to 30 ms in order to reduce the control delay.

The take-up winding frame 8 has a cylindrical winding portion having a radius R, and is rotatably supported. The motor 9 coupled to the reel 8 is, for example, an AC motor such as an induction motor, and is connected to the inverter 10. The inverter 10 as a motor driving device converts a DC voltage of the DC power supply 10a into an AC voltage, and is configured to be able to change the frequency of the AC voltage supplied to the motor 9. A known traverser 19 is arranged near the take-up bobbin 8. Traverser 1
Numeral 9 is for moving the wire 1b from one end in the axial direction of the winding frame 8 to the other end and vice versa in order to wind the wire 1b uniformly on the winding frame 8.

Control means 21 connected to inverter 10
Is for controlling the output voltage and frequency of the inverter 10 to control the rotation speed of the motor 9 and the bobbin 8, and is connected to the line 22 as speed command value supply means and the tension sensor 7b. The control means 21 determines the output frequency f10 of the inverter 10 based on the speed command f0 of the line 22 synchronized with the supply-side inverter 5 and the detected tension value Vt obtained from the tension sensor 7b.

As shown schematically in FIG. 2, the take-up side control means 21 includes a reference voltage source 30 as a tension reference value generating means, an error amplifier 31 as an error signal or deviation signal forming means, and a tension level. It comprises a judging means 32, an operation amount creating means 33 which can also be called a correction value creating means, a coefficient multiplier 34, and a calculator 35.

The reference voltage source 30 generates a reference voltage Vr indicating a tension reference value corresponding to the center position or the home position of the pressing body 7a. One input terminal of the error amplifier 31 is connected to the tension sensor 7b, and the other input terminal is connected to the reference voltage source 30. Therefore, the error amplifier 3
1 is an error signal ΔV between the detected tension value Vt and the reference voltage Vr.
t = Vt-Vr.

The tension level determining means 32 determines the relationship between the detected tension value Vt shown in FIG. 3A and the first, second, third and fourth tension values Vt1, Vt2, Vt3 and Vt4. And the first, second, third and fourth comparators 36, 3
7, 38, 39, and first, second, third, and fourth comparison reference voltage sources 40, 41, 42, 43 as first, second, third, and fourth tension value generating means; AND gate 44
And first and second NOT circuits 45 and 46.
The positive input terminals of the first, second and fourth comparators 36, 37, 39 and the negative input terminal of the third converter 38 are connected to the error amplifier 31. First comparison reference voltage source 4
0 is the first value corresponding to Vt1-Vr = -V1 in FIG.
Generates a comparison reference voltage. Since the negative input terminal of the first comparator 36 is connected to the first comparison reference voltage source 40, the first comparator 36 outputs a high level signal when the error signal .DELTA.Vt is higher than the first comparison reference voltage -V1. Output, and conversely, a low level output when .DELTA.Vt is lower than -V1. Similarly, the second, third, and fourth comparison reference voltage sources 41, 42, and 43 provide Vt2-Vr = + V1, Vt3.
The second corresponding to -Vr = -V2, Vt4-Vr = + V2;
Generating third and fourth comparison reference voltages; 2nd and 4th
The negative input terminals of the comparators 37 and 39 are the second and fourth input terminals.
Are connected to the comparison reference voltage sources 41 and 43, respectively, so that a high-level output is generated when the voltage of each positive input terminal is higher than the voltage of the negative input terminal. A low level output is generated when the voltage is lower than the voltage of the input terminal. Further, since the positive input terminal of the third comparator 38 is connected to the third comparison reference voltage source 42, when the tension detection value Vt becomes lower than the third comparison reference voltage -V2, the high level output is obtained. Occurs. As is clear from the above, the first comparator 36 determines whether or not the detected tension value Vt is higher than the first tension value Vt1 shown in FIG. The second comparator 37 determines whether the detected tension value Vt is higher than the second tension value Vt2. The third comparator 38 determines whether the detected tension value Vt is higher than the third tension value Vt3. Also,
The fourth comparator 39 determines whether the detected tension value Vt is higher than the fourth tension value Vt4. One input terminal of the AND gate 44 is connected to a first comparator to determine whether the detected tension value Vt falls within a first area Z1 between the first tension value Vt1 and the second tension value Vt2. The other input terminal is connected to a second comparator 37 via a first NOT circuit 45. Therefore,
When the output of the first comparator 36 is at a high level and the output of the second comparator 37 is at a low level, the AND gate 4
4 is at a high level, and it is determined that the detected tension value Vt is within the first area Z1. The NOT circuit 46 connected to the AND gate 44 generates a high level output when the detected tension value Vt is out of the first area Z1.

The first manipulated variable creating means 33 can be called a correction value creating means.
Is subjected to a predetermined process to output a first manipulated variable fa. The first manipulated variable creating means 33 switches the response speed in the servo loop in accordance with the magnitude of the detected tension value Vt by using first, second and third switches 47, 48,.
49, an integration circuit 50, a proportional integration circuit 51, and a holding circuit 52.

An integrating circuit 50 as a first time constant circuit is connected to the error amplifier 31 via a first switch 47. The first switch 47 is controlled to be turned on by the high level output of the AND gate 44, and the detected tension value Vt is set to the value shown in FIG.
As shown in the period t0 to t1 in (A), it is turned on when it is within the first area Z1 between Vt1 and Vt2. Accordingly, the integration circuit 50 integrates the error signal .DELTA.Vt with the first time constant .tau.1 and outputs the first manipulated variable fa as shown in the period from t0 to t1 in FIG. 3B. The integration circuit 50
Calculates the frequency value proportional to the integral value of the error signal ΔVt to the first
Is output as the operation amount fa.

A proportional integration circuit (PI circuit) 51 as a second time constant circuit is connected to the error amplifier 31 via a second switch 48. The second switch 48 is N
The ON control is performed by the high-level output of the OT circuit 46, and the detected tension value Vt becomes Vt1 as shown in the period from t1 to t3 in FIG.
It turns on when it deviates from the first area Z1 of .about.Vt2.
Therefore, the proportional-integral circuit 51 calculates t1 to t3 in FIG.
The error signal ΔVe is proportionally integrated with the second time constant τ2 during the period to output a first manipulated variable fa. Note that the proportional integration circuit 51 outputs a frequency value proportional to the proportional integration value of the error signal △ Ve as a first manipulated variable fa. Since the second time constant τ2 of the proportional integration circuit 51 is set smaller than the first time constant τ1 of the integration circuit 50, the response speed when the proportional integration circuit 51 is connected to the servo loop is It is faster than the response speed when the integration circuit 50 is connected to the loop. Therefore, t1 to t2 in FIG.
As shown in the period, the first manipulated variable fa responds quickly to the change in the detected tension value Vt in FIG.

A third switch 49 and a holding circuit 52 are connected between the proportional integration circuit 51 and the computing unit 35. The third switch 49 is connected to the third and fourth comparators 38,
39 is controlled by the output. When both the outputs of the third and fourth comparators 38, 39 are low, the third
The first contact a of the switch 49 is turned on, the second contact b is turned off, and the proportional-integral circuit 51 is connected to the computing unit 35. When one of the outputs of the third and fourth comparators 38 and 39 is at a high level, the first contact a is turned off, the second contact b is turned on, and the proportional integration circuit 51 is connected to the holding circuit 52. , The output of the holding circuit 52 is sent to the arithmetic unit 35. The holding circuit 52 is connected to the proportional-integration circuit 51 via the third switch 49, and the tension detection value Vt is changed to the fourth tension detection value Vt4 as shown in the period from t2 to t3 in FIG.
When the value becomes larger than the third tension detection value Vt3, the output of the proportional integration circuit 51 is extracted and held, and a constant first manipulated variable is sent to the calculator 35. The holding circuit 52 is formed so as to erase the held contents when the contact b of the third switch 49 is turned off.

The coefficient multiplier 34 sets a value fb = Kfo obtained by multiplying a frequency command value fo proportional to the rotation speed of the supply motor 4 or the output voltage of the supply inverter 5 by a predetermined coefficient K as a second manipulated variable fb. Output. This second manipulated variable f
b can also be referred to as a rotation speed command value of the take-up motor 9, and has a value larger than the first operation amount fa. Note that fb = fo can be set with K = 1. The arithmetic unit 35 is an adder in this specific example, adds the first operation amount fa to the second operation amount fb, and outputs an operation amount consisting of fc = fb + fa. When the detected tension value Vt is higher than the reference voltage Vr indicating the reference tension, the first operation amount fa becomes positive, and the operation amount fc output from the calculator 35 becomes larger than the second operation amount fb. The pick-up motor 9 is controlled to accelerate. Conversely, when the detected tension value Vt is lower than the reference voltage Vr indicating the reference tension, the first manipulated variable fa becomes negative, and
5 is smaller than the second operation amount fb, and the take-up motor 9 is decelerated.

The output of the arithmetic unit 35 is the inverter 10 of FIG.
Sent to The inverter 10 includes a known DC-AC conversion circuit and a control circuit for the conversion circuit. The control circuit of the inverter 10 controls the inverter 10 so as to obtain an output frequency proportional to the manipulated variable fc composed of the frequency command supplied from the computing unit 35 in FIG. The inverter 10 is configured such that the output voltage changes in proportion to the output frequency. The rotation speed of the take-up motor 9 connected to the inverter 10 is proportional to the output frequency of the inverter 10.

FIG. 4 schematically shows the rotational speeds F1 and F2 of the supply side motor 4 and the winding side motor 9 from the start to the end of the winding of the wire 1b. At t0 in FIG. 4, the output frequency of the supply inverter 5 is gradually increased, and at t1, the supply motor 4 is set to a predetermined rotational speed. The rotation speed F2 of the take-up motor 9 shown in FIG.
Rises up to a predetermined speed Fs in proportion to the rotation speed F1 of the wire 1b, and then gradually decreases as the winding amount of the wire 1b around the winding frame 8, that is, the winding diameter increases. When the winding of the wire 1b is completed at time t2, the speed F1 of the supply side motor 4 is gradually reduced, and the speed F2 of the winding side motor 9 is also gradually reduced from the winding end speed Fe.

Since the winding of the wire 1b is advanced by feeding back the tension of the wire 1b, the tension of the wire 1b can be kept substantially constant. By the way, the winding of the wire 1b does not always proceed ideally.
When the winding of the wire 1b is started, when the winding is finished, and when the wire 1b
The tension of b may increase abnormally or decrease abnormally. If the relatively long time constant of FIG.
If only the connection is always made, the operation amount fc cannot be changed following a rapid change in the tension, and the wire 1b may be cut. On the other hand, in the specific example shown in FIG. 2, when the detected tension value Vt deviates from the first region Z1 from the first tension value Vt1 to the second tension value Vt2, the proportional integration circuit 51 is added to the servo loop. Connected. Proportional integration circuit 5
1 has a time constant .tau.2 smaller than that of the integration circuit 50, so that the operation amount fc quickly returns to the reference value in response to a change in the tension of the wire 1b, thereby preventing the wire 1b from breaking. Can be.

If the detected tension value Vt suddenly changes to the fourth tension value Vt4 or more or the third tension value Vt3 or less in FIG. 3, if the operation amount fa corresponding thereto is generated, the tension is changed. There is a possibility that the reference value Vr will overshoot or undershoot significantly. If the output frequency of the winding-side inverter 10 is drastically changed when the wire 1b is broken, the inverter 10 may be stopped due to overcurrent or overvoltage. Therefore, in the specific example shown in FIG. 2, when the detected tension value Vt becomes equal to or less than the third tension value Vt3 or equal to or more than the fourth tension value Vt4, the first operation amount f
a is held at the lower limit value Lmin or the upper limit value Lmax as shown in FIG. That is, when the detected tension value Vt becomes equal to or less than the third tension value Vt3 or becomes equal to or more than the fourth tension value Vt4, the output of the proportional-integral circuit 51 is held by the holding circuit 52, and this is output to the third switch. It is output as a first manipulated variable fa via the control unit 49. Therefore, a large change in the first operation amount fa is prevented, and cutting of the wire 1b is prevented. Further, overcurrent or overvoltage of the inverter 10 can be prevented.

[0029]

[Second Embodiment] Next, a winding device according to a second embodiment will be described. The winding device of the second embodiment is shown in FIG.
The control means 21 shown in FIG. 2 is modified to the control means 21a shown in FIG. 5, and the other parts are formed in the same manner as in FIG.

The control means 21a of the second embodiment shown in FIG.
Is the tension reference voltage source 30 of the control means 21 of FIG.
Second, third and fourth comparison reference voltage sources 40, 41, 4
2, 43, the variable tension reference voltage source 30 ', the first, second,
Third and fourth comparison reference voltage sources 40 ', 41', 4
The structure is the same as that shown in FIG. As shown in FIG. 6, the variable tension reference voltage source 30a changes the winding start time t1 to the winding end time t2.
, A reference voltage Vr 'which gradually decreases toward. As a result, an operation amount fc for gradually increasing the tension of the wire 1b in FIG. 1 is generated, and the tension of the wire 1b increases in inverse proportion to the tension reference voltage Vr '. When the tension of the wire 1b is increased with the passage of time, winding with less loosening becomes possible. First, second, third, and fourth comparison reference voltage sources 40 ', 41', 42 ', 43' of the second embodiment.
Generates -V1 '= Vt1'-Vr' + V1 '= Vt2'-Vr'-V2' = Vt3'-Vr '+ V2' = Vt4'-Vr '. Vt1 ', Vt2', Vt3 ', Vt4'
Are Vt1, Vt2, which are fixed to constant values in FIG.
Vt3 and Vt4 are reduced with the same gradient as the reference voltage Vr 'over time.

Also in the second embodiment, the detected tension value Vt
Rapidly changes, the second switch 48 is turned on, and the same effect as in the first embodiment can be obtained.

[0032]

[Third Embodiment] A winding device according to a third embodiment comprises:
The control means 21 shown in FIGS. 1 and 2 is modified to the control means 21b shown in FIG. 7, and the other parts are formed in the same manner as in FIG.

The control means 21b shown in FIG. 7 is used to connect the first to fourth comparators 36 to 39 shown in FIG.
Are changed in the same manner as in FIG. 2 except that the reference voltage sources 40 to 43 are changed. Therefore, in FIG. 7, the same portions as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted. The first, second and fourth comparators 36, 3 in FIG.
The positive input terminals 7 and 39 and the negative input terminal of the third comparator 38 are connected to the tension sensor 7b. First, second, third and fourth comparison reference voltage sources 40a, 41a, 4a connected to the first to fourth comparators 36 to 39, respectively.
2a and 43a are Vt1, Vt2, Vt3 and Vt4 in FIG.
Occurs.

As described above, the output of the tension sensor 7b is
Even when directly connected to the fourth comparator, the same determination of the tension level as in the case of FIG. 2 can be performed. Therefore,
According to the third embodiment, the same effect as that of the first embodiment can be obtained.

[0035]

[Modifications] The present invention is not limited to the above-described embodiment, and for example, the following modifications are possible. (1) Instead of the integrating circuit 50, a proportional integrating circuit or a proportional circuit can be provided. Further, a proportional circuit or an integrating circuit can be provided instead of the proportional integrating circuit 51. That is, if there is a relationship that the time constant τ1 of one circuit 50 selected by the first switch 47 is larger than the time constant τ2 of the other circuit 51 selected by the second switch 48, The two circuits 50 and 51 may be any circuits. (2) The third switch 49 and the holding circuit 52 can be omitted. Further, the operation of the third switch 49 can be selectively prohibited by the user. (3) A circuit for stopping the winding operation by the output of the third and fourth comparators 38 and 39 indicating that the detected tension value Vt has become the third tension value Vt3 or the fourth tension value Vt4. Can be. (4) Part or all of the control means 21, 21a, 21b can be formed by a digital circuit. (5) The speed command value is supplied from the supply side control means 20 to the line 2.
Instead of sending to the winding-side control means 21 by 2, a speed command value generating means can be provided in the winding-side control means 21. If the speed command value can always be constant, the computing unit 35 can be omitted and the first operation amount fa can be directly used as the operation amount fc. (6) The present invention can also be applied to a case where the supply speed of the wire 1b changes over time. (7) The present invention can be applied to a stranded wire machine, a wire feeder, and the like. (8) The pressing body 7a is arranged on the upper side of the wire 1b contrary to FIG. 1, and when the tension of the wire 1b is large, the dancer / tension detector 7 is deformed so that the tension detection value Vt of FIG. can do. In this case, the arithmetic unit 35 in FIGS. 2, 5, and 7 is a subtractor for obtaining fc = fb-fa. (9) In FIGS. 2, 5 and 7, the coefficient multiplier 3
4. The calculator 35, the integration circuit 50 and the proportional integration circuit 51 output the manipulated variables indicating the frequency, but instead operate the voltage value proportional to the frequency of the inverter 10 or the rotation speed of the motor 9. It can be configured to output as a quantity. In this case, a voltage / frequency conversion circuit, for example, a voltage-controlled oscillator (VCO) for converting a voltage to a frequency is provided in the inverter 10, and the inverter is supplied from the VCO.
A signal indicating the frequency of the data 10 is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a winding device according to an embodiment.

FIG. 2 is a block diagram schematically showing a tension sensor and control means of FIG. 1;

FIG. 3 is a diagram schematically showing a detected tension value, a time constant of a servo loop, and an operation amount.

FIG. 4 is a diagram showing rotation speeds of a capstan motor and a take-up motor of FIG. 1;

FIG. 5 is a block diagram illustrating a tension sensor and a control unit according to a second embodiment.

FIG. 6 is a diagram illustrating a change in a reference value according to the second embodiment.

FIG. 7 is a block diagram illustrating a tension sensor and a control unit according to a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wire 3 Capstan 7 Dancer and tension detector 8 Reel 9 Motor 10 Inverter 21 Control means 32 Tension level judgment means 33 Operation amount creation means 34 Coefficient multiplier 35 Computing unit

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[Procedure amendment]

[Submission date] April 5, 2002 (2002.4.5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

BACKGROUND ART drawing machine, winding <br/> come up device of the wire in such strand machine, for example Kokoku 7-12884 Patent as disclosed in Japanese wire supply side rotating member (e.g. capstan ), A wire winding side rotating body (winding frame), a motor for driving the supply side rotating body, a motor for driving the winding side rotating body, and a tension adjusting and tension detecting function. And a dancer. The motor on the winding side is controlled based on a speed command based on the rotation information of the supply side motor. Also, in order to keep the wire tension constant, the tension detection signal obtained from the dancer and the dancer
An error signal from the reference value indicating the reference position, that is, a deviation signal is created, thereby correcting the speed command.

Claims (6)

[Claims] 1. An elongated object supply means for supplying a linear or band-shaped elongated object using a supply-side rotating body, a winding rotating body for winding the elongated object, and the winding rotating body. A winding motor for rotating the motor; a tension detecting means for detecting the tension of the elongated object; and a control means connected to the tension detecting means for controlling the winding motor. And drive means connected between the control means and the winding-side motor, wherein the control means detects a tension reference value indicating a tension reference value, and detects the tension by the tension detection means. Error signal forming means for forming an error signal indicating a difference between the detected tension value and the reference value of the tension; and a first tension value in which the detected tension value is smaller than the reference value of the tension by a predetermined value. It is larger than the reference value of the tension by a predetermined amount. A tension level determining means for determining whether or not the tension value is between the second tension value and an operation amount for maintaining the tension of the elongated object at the reference value based on an output of the error signal forming means; In response to the output of the tension level determining means indicating that the output is between the first tension value and the second tension value. Which is smaller than the first time constant in response to the output of the tension level determination means indicating that the output is not between the first tension value and the second tension value. A winding device comprising: an operation amount creating means formed to have a second time constant. 2. The control means further determines whether the detected tension value is smaller than a third tension value set smaller than the first tension value, and the tension detection value. Means for determining whether the value is greater than a fourth tension value set greater than the second tension value, and a determination result indicating that the detected tension value is smaller than the third tension value Is obtained, a constant operation amount for increasing the tension is generated, and when a determination result indicating that the detected tension value is larger than the fourth tension value is obtained, a constant operation amount for lowering the tension is obtained. 2. The winding device according to claim 1, further comprising means for generating an operation amount. 3. A means for supplying a speed command value of the winding-side motor, and a computing unit for adding or subtracting the speed command value to the operation amount formed by the operation amount creating means (33). (35) and (35).
The winding device as described in the above. 4. The winding device according to claim 3, wherein the means for supplying the speed command value generates a speed command value synchronized with the rotation of the supply-side rotating body. 5. The winding device according to claim 1, wherein the tension reference value generating means gradually changes the reference value of the tension so that the tension gradually increases as the winding time elapses. 6. The pressurizing body that contacts the elongated object and applies tension to the elongated object between the supply-side rotating body and the winding-side rotating body, A guide means for guiding a body movably in a vertical direction, and a sensor for outputting a tension detection signal detected based on a vertical position of the pressurizing body. 3. The winding device according to 3.