JP2668777B2 - Thread tension adjusting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension adjusting device for a thread (hereinafter referred to as a thread), and more particularly, to an electromagnet installed corresponding to a thread in a spinning machine or the like and controlled by an electric signal. The present invention relates to a filament tension adjusting device having means for adjusting the tension of a thread, detecting whether or not the thread is running, and measuring the running amount of the thread.

[0002]

2. Description of the Related Art For a filamentous material produced or processed by a spinning machine or the like, it is necessary to adjust the thread tension in the winding process of a textile machine such as a winder or warper.
As a method of adjusting the thread tension, conventionally, the thread is run between two dishes and the contact pressure of the dishes is adjusted by a weight or a spring pressure. In addition, several (3 to 9) wear-resistant round bars are alternately arranged, and the threads run between the round bars so that the position of the round bars is perpendicular to the running direction of the thread. A method of adjusting the tension to the yarn by adjusting the tension of the yarn and the round bar by changing the frictional force between the yarn and the round bar is generally known. Also, as a method of controlling these tensions at the same time, thread the yarn on a rotatable drum and run it, and apply anti-rotational force to its rotating shaft by air pressure or electric power, and adjust this air amount or electricity amount. A method of performing simultaneous control has also been considered. In addition, a yarn length meter that is a combination of a counter that counts the number of rotations of the drum by running the yarn on a rotatable drum and running the yarn, a yarn traveling detector, a cutting device, and the like is used as an independent device.

[0003]

However, in the prior art, first, friction is applied to the running yarn, so that the tension device is worn and the yarn quality is deteriorated due to the fluffing of the yarn. Further, the tension is adjusted individually, so that it requires a lot of work and the work is performed artificially. Therefore, the tension cannot be adjusted uniformly due to individual differences. In addition, since the yarn has become thinner and the yarn speed has increased in recent years, many yarn breakages due to friction have occurred, resulting in an increase in obstacles in the process. On the other hand, in the conventional method of adjusting the tension by applying the anti-rotational force to the thread-wound drum, the thread speed fluctuates and the tension on the thread fluctuates in principle. Furthermore, when the yarn breakage or the yarn running is stopped, the drum wheel rotates in reverse and the yarn breakage end winds around the drum wheel. Therefore, in order to avoid this problem, it is necessary to separately add a yarn breakage detector and a yarn cutter, and the yarn length meter for measuring the traveling amount of the yarn, as described above, reduces the rotation speed of the hourglass. Weigh,
When the yarn breaks, the wrist wheel spins and an error occurs. Therefore, in order to prevent this error, since it is installed on the machine base as an independent device by adding a yarn traveling detector and a gate circuit,
There are problems such as complicated structure, difficult handling, and high price.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to first adjust the tension of a yarn without giving friction to the yarn, regardless of the yarn speed. , Constantly applying uniform tension and eliminating the problem that the yarn winds around the drum, and for multiple yarns,
An object of the present invention is to provide a thread tension adjusting device for electrically controlling the tension simultaneously.

Another object of the present invention is to construct a yarn breakage detecting function and a yarn traveling amount measuring function with a simple device, which is versatile and can be manufactured at low cost, and can be handled and maintained. Is to provide a tension adjusting device for a thread which is easy to operate.

[0006]

For these purposes, the present invention relates to a plurality of tension adjusters arranged respectively corresponding to a plurality of filaments, and connected to these tension adjusters via feeder lines. A tension controller, wherein the tension adjuster is a tension adjuster,
Including a yarn break detection unit and a yarn length meter, the tension adjusting unit,
A drum wheel that is fixed to one end of a rotating shaft rotatably supported by a frame, and that is hung on a thread and rotates following the running of the thread, and is fixed to the other end of the rotating shaft, and A rotating magnetic body having a plurality of magnetic poles of electric soft iron material that are divided and arranged at equal intervals in the circumferential direction, and a plurality of fixed arrangements in the frame so as to give a magnetic field having a phase difference to the magnetic poles of the rotating magnetic body. Of the electromagnet, a position detector which is fixedly arranged corresponding to the outer circumference of the rotating magnetic body, and which detects the position of the magnetic pole and outputs a signal each time the magnetic pole passes, and controls the drive current of the electromagnet by a variable voltage. And a switching circuit that is connected to the output of the constant current circuit and that operates the electromagnet according to the phase difference according to the output signal of the position detector. Thread by adjusting part A variable reference power supply for simultaneously controlling the tension of an object, a yarn length setting device for setting the yarn length of the yarn length meter, a relay circuit operated by an output of the yarn breakage detecting unit and an output signal of the yarn length meter, and the tension adjustment. It is characterized by a configuration including a power supply to be supplied to the vessel.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings and the operation thereof. FIG. 1 is an electrical configuration diagram of an example of a device according to the present invention, FIG. 2 is a plan view of a tension adjusting portion, and FIG. 3 is a cross-sectional view taken along the line AA in FIG. Drum wheel 2 made of wear-resistant material
It is wound around a for half to several times, runs in the direction of the solid arrow A, is wound around a bobbin or beam of a textile machine, and rotates the hand wheel 2a. The drum 2a is connected to the rotating magnetic body 3 via a rotating shaft 4 rotatably supported by a bearing 5. In the rotating magnetic body 3, a plurality of magnetic poles 6a to 6n made of an electrically soft iron material are arranged at regular intervals on a round circle, and marks 7a to 7n of different colors are provided on the outer peripheral surface of the magnetic poles 6a to 6n. Has been applied. In addition, a position detector 8 for detecting the marks 7a to 7n, which is a well-known optical proximity switch, is arranged near the outer circumference of the rotating magnetic body 3,
The position detector 8 outputs a pulse signal each time the marks 7a to 7n pass. Corresponding to the rotating magnetic body 3, electromagnets 9a and 9b for giving magnetic fields having a phase difference to the magnetic poles 6a to 6n are arranged, and the electromagnets 9a and 9b are connected to the switching circuit 10. There is. The switching circuit 10 is composed of power transistors 11a and 11b and a flip-flop circuit 12. The input of the flip-flop circuit 12 is connected to the output of the position detector 8, and the output terminal of the flip-flop circuit 12 alternates with each output pulse. The output terminal is connected to the power transistor 11
a and 11b, respectively. Therefore, power transistors 11a and 11b are energized alternately. The input of the switching circuit 10 is connected to the output of the constant current circuit 13 to receive power supply. The constant current circuit 13 is a known constant current circuit composed of a power transistor 14, an operational amplifier 15, and a resistor 16. More specifically, the potential difference of the resistor 16, that is, the resistance, is applied to one input of the operational amplifier 15 of the feedback amplifier. One of the input side of the resistor 16 and the operational amplifier 15 is connected to the output side terminal t of the resistor 16 and the 0 (zero) point terminal T of the reference voltage E, which is proportional to the current flowing through the resistor 16. A potential difference is applied, and the other one input is connected to the variable reference power source 18 of the control unit 17 and the variable reference voltage E is applied. The output of the operational amplifier 15 is connected to the base terminal of the power transistor 14. With these configurations, the power transistor 14 can variably control the current value flowing through the resistor 16 to a desired value by the variable reference voltage E. Therefore, a controlled constant current flows through the electromagnets 9a and 9b, and a constant magnetic field is generated. As described above, the constant magnetic field with a phase difference variably controlled by the electromagnets 9a and 9b is applied to the rotating magnetic body 3 to cause the drum 2a.
Tension adjusting unit 1 for variably controlling the tension of the yarn 1a to be hung on
9 are configured. The detailed description and operation of the tension adjusting section 19 will be described later.

Next, a description will be given of another configuration of the present invention, which is the detection of the yarn breakage and the configuration and operation for measuring the running length of the yarn. In FIG. 1, the output of the position detector 8 is connected to a yarn breakage detection unit 20 and a yarn length meter 21. The thread breakage detection unit 20 is composed of a time constant circuit 25 composed of a resistor 22, a capacitor 23 and an inverter IC 24 and an indicator lamp 26. The output pulse interval of the position detector 8 is calculated from the time constant of the resistor 22 and the capacitor 23. When the number decreases, a signal is sent to the output side of the inverter IC 24, the indicator lamp 26 is turned on, and the relay circuit 28 of the control unit 17 is operated via the diode 27. When the relay circuit 28 operates, the output signal is applied to the drive device 29 of the textile machine such as the bobbin winder and the machine base is stopped.

The yarn length meter 21 has an up-down counter 3
0, a gate circuit 31, and a reset switch 32, the yarn length of which is the yarn length setter 3 provided in the controller 17.
3 is set. More specifically, the uptown counter 30 includes an addition terminal U for adding and storing the number of pulses,
A subtraction terminal D for subtracting the stored added value and a reset terminal S for outputting a signal when the added stored value is subtracted and becomes 0 (zero) are provided. On the other hand, the yarn length setting device 33 is composed of an oscillator 34, a variable counter reset counter 35 and a gate circuit 36. The oscillator 34 continuously oscillates a constant pulse signal to input the input terminal P of the reset counter 35 and the gate. The reset counter 35 is connected to one input of a circuit 36, respectively.
Is connected to the other input of the gate circuit 36. The output of the gate circuit 36 is connected to the input of the gate circuit 31 of the yarn length meter 21, and the output of the gate circuit 31 is connected to the addition terminal U. The reset terminal S of the up / down counter 30 is connected to the relay circuit 28 via the diode 37 and the power supply line 38. The other input of the gate circuit 31 is connected to the reset switch 32, and the yarn length setting device 3 is connected via the power supply line 38.
3 is connected to the reset terminal R of the reset counter 35. The reset switch 32 is a switching system using a monostable multivibrator circuit, and has a function of closing the contacts for a few seconds by one shot manually. Therefore, the reset counter 35 is reset within the closed time of the reset switch 32, the output pulse of the oscillator 34 is applied to the addition terminal U of the up / down counter 30 via the gate circuit 36 and the gate circuit 31, and the reset counter 35 is When the set value is reached, the output terminal Q
Generates a signal, and gate circuit 36 closes its output.
As a result, a numerical value corresponding to the set yarn length is additionally stored in the up / down counter 30, the output signal of the reset switch 32 is stopped and the output of the reset terminal S is reset at the end of the set added value, and at the same time, the gate circuit. 31 is closed, and the input of the addition signal is suppressed. In this state, when the output signal of the position detector 8 is applied to the subtraction terminal D of the up / down counter 30, the up / down counter 30 subtracts the added value, and when the added stored value becomes 0 (zero), the reset terminal is reset. A signal is output to S, the relay circuit 28 is operated via the diode 37 and the power supply line 38, and the reset switch 32 is pressed and reset, and the same operation is repeated. As a result, the thread 1a
Has a function of stopping the bobbin winding for every constant yarn length according to the multiplier value of the outer peripheral value of the drum 2a and the set addition value.

In the above configuration, the tension adjuster 19, the yarn breakage detector 20, and the yarn length meter 21 are integrated to form a tension adjuster 37a. The tension adjusters 37a to 37n are connected to a plurality of yarns 1a to 1n. Correspondingly installed, these tension adjusters 37a to 37n are connected to the control unit 17 via a power supply line 38. The control unit 17 is configured by integrating a variable reference power supply 18, a relay circuit 28, a yarn length setting device 33, and a DC power supply 39 that supplies power to each unit.
Is connected to an external driving device 29 and a commercial power supply 40. With this configuration, the tensions of the yarns 1a to 1n are variably controlled all at once by the variable reference voltage, and when any of the yarns 1a to 1n is cut or the traveling is stopped, the drive circuit 29 is operated by the relay circuit 28. The desired value of the set yarn length of the yarn length meter 21 is stopped and set by the yarn length setter 33, and when the yarns 1a to 1n reach the set yarn length, the relay circuit 2
8 is operated, the respective functions of the plurality of tension adjusters 37a to 37n are simultaneously adjusted and controlled by the control unit 17, and the relay circuit 28 is operated and driven when any of the yarns 1a to 1n is cut. Actions such as the device 29 being stopped are performed.

Next, the structure and operation of the tension adjusting portion 19 will be described in detail with reference to FIGS. 2 and 3, the thread 1a is wound around the drum 2a half to several times, and the drum 2a is rotated while traveling in the direction of arrow a. The hourglass 2a is made of light metal and has a perfect circle shape.
The outer peripheral surface is hardened to have wear resistance, and the drum 2 a is fixed to one end of the rotary shaft 4. The rotating shaft 4 is made of steel, and is rotatably supported by a bearing 5 such as a ball bearing fixed to a frame 41. The rotating magnetic body 3 is fixed to the other end of the rotating shaft 4. It is possible to rotate freely with. The rotating magnetic body 3 has magnetic poles 6a to 6n of an electric soft iron material such as pure iron arranged on a holder such as a resin at equal intervals W (see FIG. 4) around the circumference. Is fixed to the rotating shaft 4 so as to be integrally rotatable with the hourglass 2a. Next, the electromagnets 9a and 9b are fixedly arranged on the frame 41 so as to correspond to the magnetic poles 6a to 6n of the rotating magnetic body 3. The electromagnets 9a and 9b are respectively provided with yokes 42a and 42b,
The magnetic cores 43a and 43b, the coils 44a and 44b, and the yokes 42a and 42b and the magnetic cores 43a and 43b.
Is an electric soft iron material, and the magnetic core 43a and the magnetic core 43b are provided in opposition to the magnetic poles 6a to 6n with a small gap that is not in contact with them.
Each of 9n magnetic paths is formed. Thus, the magnetic core 43
a and 43b are arranged at an interval L (see FIG. 4) that gives a magnetic field having an appropriate phase to the magnetic poles 6a to 6n.
The positional relationship between them will be described later. On the other hand, marks 7a to 7n are provided at equal intervals on the outer circumference of the rotating magnetic body 3 and at the positions corresponding to the equal intervals W of the magnetic poles 6a to 6n, and the marks 7a to 7n are passed therethrough corresponding to the marks 7a to 7n. A position detector 8 that outputs a pulse signal every time is provided. As the position detector 8, a known optical sensor or a magnetic sensor for directly detecting the magnetic poles 6a to 6n is used, and the output of the position detector 8 is a switching circuit 10, a yarn breakage detection unit 20,
It is connected to the yarn length meter 21 to adjust the tension of the yarn, detect the yarn breakage, and measure the yarn length as described above.

Next, the operation of the electromagnets 9a and 9b for giving a magnetic field having a phase difference to the rotating magnetic body 3 and giving a braking force to the drum 2a will be described with reference to FIGS. In the embodiment shown in FIG. 4, the magnetic poles 6a to 6n are equally divided into 6 poles and are arranged at the center distance W, and the two electromagnets 9a and 9b are arranged at the center distance L between the magnetic cores 43a and 43b. The magnetic poles 6a to 6n are shown to show a positional relationship corresponding to the distance, and the magnetic poles 6a to 6n are rotationally moved. In FIG. 4, the magnetic cores 43a and 43b of the electromagnets 9a and 9b are fixedly arranged at an interval L, and are operated alternately for each output pulse of the position detector 8 as described above. Now, in the state of position A in the figure, the magnetic core 43a of the electromagnet 9a is
Corresponding to a and corresponding, it is in the energized state, the magnetic core 43b of the electromagnet 9b is at the intermediate position between the magnetic poles 6b and 6c, and is in the rest state. When the magnetic poles 6a to 6n move in the arrow B direction as the rotating magnetic body 3 rotates, the magnetic field of the electromagnet 9a changes to the magnetic pole 6a.
To the position B, the magnetic pole 6
The suction force is exerted on b. At this point, the energization of the electromagnet 9a is stopped, and the braking force applied to the magnetic pole 6a and the magnetic pole 6b.
At the same time, the energization is switched to the electromagnet 9b. At this time, the magnetic core 43b of the electromagnet 9b is
And therefore correspond to the magnetic poles 6a to 6n
Is further moved to the position C, the braking force by the magnetic field of the electromagnet 9b acts on the magnetic pole 6b, the electromagnet 9b is stopped at the time of the position C, the electromagnet 9a is energized, and the position A
The same operation as described below is repeated. As described above, the magnetic cores 43a and 43b are arranged so that only the braking force in the rotating direction is applied to the rotating magnetic body 3 and the attractive force is not applied.
Is expressed as L = KW / N [where N is an arbitrary integer and the number of magnetic cores 43a and 43b corresponding to the electromagnets 9a and 9b, and K is a positive odd integer].

FIG. 5 is a time chart of the operation of FIG. 4, in which the horizontal axis represents the moving time H of the magnetic poles 6a to 6n, and the vertical axis represents the signal or braking force of each part. In FIG. 5, the position detector 8 synchronizes with the marks 7a to 7n to output a signal D.
₀ is output, and the pulse interval HW is the time obtained by dividing 1/2 of the interval W between the magnetic poles 6a to 6n by the rotational speed of the drum 2a. In accordance with the pulse signal, drive currents Da and Db alternately flow through the electromagnets 9a and 9b, and braking forces Fa and Fb act on the magnetic poles 6a to 6n in the shapes shown in the figure according to the respective magnetic fields. Therefore, the drum 2a connected to the rotating magnetic body 3
Is applied with a braking force Fa + Fb, which is the combined force of the braking forces Fa and Fb, and a tension proportional to the braking force Fa + Fb is applied to the running direction of the yarn 1a.

The embodiment has been described in detail above. By increasing N in the above equation, the pulsation of the braking force on the rotating magnetic body 3 can be reduced, and the magnetic pole 6a can be reduced.
Similarly, the pulsation can be reduced and the tension can be smoothly adjusted by subdividing the interval W of 6 n. Further, the output signals of the yarn breakage detecting unit 20 and the yarn length meter 21 may be connected to a stop device or a yarn cutting device, which are individually provided, and correspond to each of the yarns 1a to 1n. Further, the indicator light 26 of the yarn breakage detecting unit 20 may be a common display that is displayed in accordance with the output signal of the yarn length meter 21, or a priority circuit may be added to this to give a priority display depending on usage conditions.

[0015]

As described above, according to the present invention, since the tension can be applied to the yarn without giving friction, the surface of the yarn is not damaged and the yarn is not broken. Can be prevented. Further, the tension can be adjusted at successive stages, and a large number of tension adjusters can be adjusted all at once. Therefore, the quality of the yarn is improved, and the labor is reduced by reducing the number of workers and improving the work efficiency.

Further, according to the present invention, since the braking force is constantly applied to the hourglass, there is no accident that the hourglass idles and the yarn is wound when the yarn winding is stopped, and there is no consumables. It is easy to maintain and manage.

Furthermore, according to the present invention, the tension of the yarn can be adjusted, the yarn breakage can be detected, and the yarn length can be measured with a simple structure, so that it can be used for various purposes and can be manufactured at low cost. It is easy to install and handle.

[Brief description of the drawings]

FIG. 1 is an electrical configuration diagram of an example of a thread tension adjusting device according to the present invention.

FIG. 2 is a plan view of a tension adjusting unit.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is an explanatory view of the operation of the tension adjusting section.

5 is a time chart diagram of FIG. 4. FIG.

[Explanation of symbols]

 1a-1n Thread 2a-2n Hourglass 3 Rotating magnetic body 4 Rotating shaft 6a-6n Magnetic pole 7a-7n Mark 8 Position detector 9a, 9b Electromagnet 10 Switching circuit 11a, 11b Power transistor 12 Flip-flop circuit 13 Constant current circuit 14 Power transistor 15 Operational amplifier 16 Resistor 17 Control unit 18 Variable reference power supply 19 Tension adjustment unit 20 Thread break detection unit 21 Thread length meter 25 Time constant circuit 26 Indicator light 27, 37 Diode 28 Relay circuit 29 Driving device 30 Up / down counter 31, 36 Gate circuit 32 Reset switch 33 Yarn length setting device 34 Oscillator 35 Reset counter 37a-37n Tension adjuster 38 Power supply line 39 DC power supply 40 Commercial power supply 41 Frame 42a, 42b Yoke 43a, 43b Magnetic core 44a, 44b Yl

Claims (4)

(57) [Claims] 1. A tension control device comprising: a plurality of tension adjusters arranged respectively corresponding to a plurality of thread-like objects; and a control unit connected to the tension adjusters via a power supply line. , A thread breakage detecting section and a thread length meter, wherein the tension adjusting section is fixed to one end of a rotating shaft rotatably supported on a frame, and a thread is hung to follow the running of the thread. A rotating wagon, fixed to the other end of the rotating shaft,
And a rotating magnetic body having a plurality of magnetic poles of electric soft iron material which are divided at equal intervals in the circumferential direction, and a fixed arrangement on the frame so as to give a magnetic field having a phase difference to the magnetic poles of the rotating magnetic body. A plurality of electromagnets, a position detector that is fixedly arranged corresponding to the outer circumference of the rotating magnetic body, and that detects the position of the magnetic pole and outputs a signal each time the magnetic pole passes, and a drive current of the electromagnet by a variable voltage. A constant current circuit to be controlled, and a switching circuit that is connected to the output of the constant current circuit and that operates the electromagnet according to the phase difference by the output signal of the position detector, and the control unit is
A variable reference power supply for simultaneously controlling the tension of the thread by the tension adjusting section, a thread length setting device for setting the thread length of the thread length meter, an output of the thread breakage detecting section and an output signal of the thread length meter. A tension adjusting device for a filamentous material, comprising a relay circuit and a power supply for supplying the tension adjusting device. 2. The yarn breakage detection unit includes a time constant circuit connected to the output of the position detector, and the output of the time constant circuit is connected to the relay circuit via an indicator light, a diode and the power supply line. The time constant circuit is connected and outputs when there is no input signal for a certain period of time, and the output signal lights up the indicator lamp, and the relay circuit is operated to output a signal such as a machine stop. The tension adjusting device for a thread-like material according to claim 1, wherein 3. The yarn length meter includes an up-down counter and a gate circuit, an output of the position detector is connected to a subtraction terminal of the up-down counter, and a setting signal of the yarn length setting device is the gate signal. The output of the gate circuit is applied to one input of the circuit and is connected to the addition terminal of the up / down counter, and the value set in the addition terminal matches the value input in the subtraction terminal. 3. The tension of the thread according to claim 1, wherein a reset terminal of the up / down counter, which is output at the time, is connected to the other input of the gate circuit, and the relay circuit is operated via a diode. Adjustment device. 4. An interval L between magnetic cores of a plurality N of the electromagnets arranged to provide a magnetic field having a phase difference to the magnetic poles divided and arranged at equal intervals W in the rotating magnetic body.
5. The tension adjusting device according to claim 1, 2 or 3, wherein the filaments are arranged under the condition of L = KW / N (where K is a positive odd integer).