JPS6135106B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tension adjustment device for a yarn winding device, and more specifically, the present invention relates to a tension adjustment device for a yarn winding device. The present invention relates to a tension adjustment device for a thread winding device that adjusts the tension.

As a typical tension adjustment device for a conventional yarn winding device, a so-called take-up roll is interposed between the yarn sending side and the yarn winding side, and the yarn is adjusted by driving this take-up roll with a motor. There is a device to adjust the winding tension. The tension adjusting device of such a conventional yarn winding device operates as follows. That is, the take-up roll is always rotated in a fixed direction (the running direction of the thread) as the thread runs. When power is supplied to the motor provided to drive the take-up roll rotating in a certain direction to generate torque in the same direction as the rotation direction of the take-up roll, this causes the take-up roll to The rotational force of is strengthened. Therefore, in this case, the yarn tension on the winding side is weakened, and so-called power running control is performed. On the contrary, if electric power is supplied to the motor to generate a torque in a direction opposite to the direction of rotation of the take-up roll, the rotational force of the take-up roll is thereby weakened.
Therefore, in this case, the yarn tension on the winding side is increased, and so-called braking control is performed. Note that this braking control here utilizes so-called regenerative braking of the motor.

However, with the conventional tension adjustment device of the yarn winding device as described above, although it is possible to perform the power running control and braking control separately, it is not possible to perform the braking control continuously from the power running control, or vice versa. It was impossible to perform continuous control from braking control to power running control. The reason for this is that, for example, when performing braking control continuously from power running control, the torque generated by the motor for driving the take-up roll is changed from positive torque (torque in the same direction as the rotation direction of the take-up roll). It is necessary to continuously and slightly change the negative torque (torque in the opposite direction to the direction of rotation of the take-up roll). However, when adjusting the tension of the conventional yarn winding device, it is difficult to continuously control the output torque of the motor for driving the take-up roll from positive to negative or from negative to positive.

In other words, when switching from power running control to braking control, the power supply state to the motor (for DC motors, the polarity of the field coil or armature coil)
Therefore, continuous automatic operation is not possible. In order to solve this problem and perform power running control and braking control with one motor,
There is also a tension adjustment device for the yarn winding device that is equipped with a reversible control device, but even with such a device, hunting (out of balance) occurs near the point where the torque of the motor for driving the take-up roll becomes zero.
will occur. Therefore, in order to prevent this hunting, it is essential to use a circulating current, which has the disadvantage that the device becomes extremely expensive and cannot be put to practical use.

Continuously performing the above-mentioned power running control and braking control is absolutely necessary when performing taper tension control (a control method that gradually decreases or increases the tension of the winding yarn) of the yarn winding tension. It is. Therefore,
It has been impossible to taper tension control the yarn winding tension with the conventional tension adjustment device of the yarn winding device.

This invention was made in view of the drawbacks of the conventional line winding device, and it is possible to continuously shift from power running control to braking control, and conversely, to continuously shift from braking control to power running control. It is an object of the present invention to provide a tension adjustment device for a yarn winding device that can thereby perform taper tension control of the yarn tension on the winding side.

The tension adjusting device for a yarn winding device of the present invention is capable of continuously controlling a plurality of tension regulators only within a range where the polarity of the voltage applied to a motor for driving a take-up roll interposed between a sending beam and a winding beam does not change. a motor, a torque setting device that outputs a torque setting signal that continuously changes from positive to negative or from negative to positive in order to give continuous torque changes to this motor, and a torque setting signal from this torque setting device. and a control circuit that controls the magnitude of the motor torque according to the magnitude of the motor, and when the polarity of this setting signal changes, the control of the take-up roll is switched from control by one motor to control by the other motor. It is configured.

The present invention will be explained in more detail below with reference to embodiments shown in the accompanying drawings.

FIG. 1 is an explanatory diagram showing the outline of this invention,
The yarn Y sent out from the sending beam B1 is wound onto the take-up beam B2 via the take-up roll TR. Drive this take-a-tsuprole TR to thread Y
Two take-up roll drive motors M1 and M2 are provided in order to adjust the winding tension of the motor M1, and a motor control circuit 2-1 for controlling the motor M1 and a motor control circuit 2-1 for controlling the motor M2. A motor control circuit 2-2 is provided, respectively. A torque setting device 3 is attached to the motor control circuit 2-1 and the motor control circuit 2-2.
This torque setting device 3 is composed of a variable voltage source capable of continuously outputting a voltage from +V volts to -V volts, and uses the output voltage as a torque setting signal TV for the motor control circuit 2-1, 2-2
This is what is output to. In addition, the motor control circuit 2
-1 has two changeover switches S1 and S1', and the motor M1 is controlled according to the setting states of the changeover switches S1 and S1' and the value of the torque setting signal TV.
This is to perform power running control or braking control. Similarly, the motor control circuit 2-2 has two changeover switches S2 and S2'.
2. The motor M2 is controlled to power or brake depending on the setting state of S2' and the value of the torque setting signal TV. The tension adjusting device for the yarn winding device of the present invention includes two motors M1 and M2 described above.
For example, by making motor M1 take charge of power running control and further making motor M2 take charge of braking control (the reverse is also possible), the control form is continuously shifted from power running control to braking control or from braking control to power running control. This is what made it possible to do so.

Figure 2 shows the motor control circuits 2-1 and 2-2.
An embodiment of the present invention will be shown, and the tension adjusting device for a yarn winding device of the present invention will be explained in more detail. Furthermore, as shown in Fig. 2, the motor control circuit 2-1
Since the motor control circuits 2-2 and 2-2 have exactly the same configuration, the following description of the configuration will refer to the motor control circuit 2-2.
We will explain only 1 and explain motor control circuit 2-2.
A description of the configuration will be omitted.

As shown in FIG. 2, the output terminal of the torque setting device 3 is connected on one side to the fixed contact A of the changeover switch S1, and on the other hand to the fixed contact B of the changeover switch S1 via an inverting amplifier 211. A movable contact C of the torque changeover switch S1 is connected to a second input terminal I2 of a comparator 212, and an output terminal of a current detector 216, which will be described later, is connected to the first input terminal I1 of this comparator 212. .
The output terminal of comparator 212 is connected to the input terminal of control signal generator 214 via amplifier 213. Each output terminal 01 to 0 of the control signal generator 214
4 is connected to the gate terminal of each thyristor S1 to S4 constituting the thyristor rectifier circuit 215, respectively. In addition, as shown in the figure, an AC power supply 20 is connected to the input terminals a and b of the thyristor rectifier circuit 215.
0 output terminal is connected. Further, the output terminal c of the thyristor 215 is connected to one input terminal of the take-up roll drive motor M1 via the power detector 216, and the thyristor rectifier circuit 21
The output terminal d of the motor M1 is directly connected to the other input terminal of the motor M1.

As shown in the figure, the field coil C1 of the motor M1 is provided with a changeover switch S1', so that the excitation direction of the motor M1 can be changed over.

Here, as described above, the torque setting device 3 outputs a torque setting signal TV (-V to +V) for setting the torque to be applied to the take-up roll (not shown), and the operator of the yarn winding device outputs the torque setting signal TV (-V to +V). It is configured so that it can be adjusted as appropriate by rotating a dial. Further, the comparator 212 compares the signal FS1 inputted to the input terminal I1 (which is a signal outputted from the current detector 216 as described later) and the torque setting signal TV inputted to the input terminal I2, It is configured to output a signal (TV-FS1). Furthermore, a control signal generator 21
4 receives the signal output from the amplifier 213 and connects each thyristor S1 to S1 of the thyristor rectifier circuit 215.
It is configured to output four pulse signals P1 to P4 for controlling the conduction angle of S4. Further, the current detector 216 detects the current supplied to the motor M1, and outputs a signal having a voltage value corresponding to this detected value as a current detection signal FS1. When the changeover switch S1' of the motor M1 sets its movable contact C to the fixed contact A', the motor M1 generates a positive torque (torque in the same direction as the rotational direction of the take-up roll), and the fixed contact B When set to ', the motor M1 is configured to generate a negative torque (torque in the opposite direction to the rotational direction of the take-up roll).

Motor control circuits 2-1 and 2 having the above configuration
-2 operation will be explained next. In the following explanation, for convenience of explanation, we will first explain (A) constant value control in which the motor M1 always generates a constant torque and thereby applies a constant torque to the winding yarn.
Next, (B) taper tension control, which continuously shifts from power running control to braking control (or vice versa), will be explained.

(A) Constant value control As mentioned above, constant value control is a control method that always applies a constant value of tension to the winding yarn via the take-up roll, and is a control method that is a lower level concept than taper tension control. It is. In this case, the torque setting device 3 is set to output a positive torque setting signal TV, and the switch S1 of the motor control circuit 2-1 and the switch S2 of the motor control circuit 2-2 are connected to the fixed contact A. The input is set to .
Note that the manner in which constant value control is performed is not limited to the above-mentioned one, and when the torque setting device 3 outputs a torque setting signal TV with a negative value, switch S1 of the motor control circuit 2-1 and the motor Control circuit 2-2
Both switches S2 may be set to the fixed contact B. This is because the negative torque setting signal TV output from the torque setting device 3 is converted into the positive torque setting signal TV via the inverting amplifiers 211 and 221, respectively. In the following explanation, only the motor control circuit 2-1 will be explained, but it goes without saying that the motor control circuit 2-2
Exactly the same operation is performed in .

As mentioned above, selector switch S1' of motor M1
When the movable contact C' is set to the fixed contact A', the motor M1 is set to generate a positive torque in the same direction as the rotational direction of the take-up roll, and the tension adjustment device is set to perform power running control. Ru. The current detector 216 then detects the current value supplied to the motor M1 and outputs this as a current detection signal FS1. Comparator 212 has its first input terminal I
1 receives the current detection signal FS1, and its second input terminal I2 receives the torque setting signal TV set by the torque setting device 3. As a result, the difference signal (TV-FS1) is output, and this signal is amplified by the amplifier 213. Control signal generator 2
14 receives the output signal of the amplifier 213 and outputs four pulse signals P1 whose phase is controlled according to this signal.
~P4 is output to control the conduction angle of each thyristor S1 to S4 of the thyristor rectifier circuit 215. In this way, the torque generated by the motor M1 is feedback controlled, and a current of a value suitable for the motor M1 to output the torque of the value set by the torque setting device 3 is output from the output terminals c and d of the thyristor rectifier circuit 215. Ru. As described above, since the movable contact C' of the changeover switch S1' is set to be closed to the fixed contact A', power running control is executed in this case. Needless to say, braking control is executed when the movable contact C' of the changeover switch S1' is set to the fixed contact B'.

Incidentally, as described above, the control circuit 2-2 operates exactly the same as the control circuit 2-1 described above.
In this case, if the changeover switches S1' and S2' are set to control both motors M1 and M2 in power running, the torque generation range will be twice that of the case where power running is controlled by a conventional device. Become. Similarly, if switches S1' and S2' are set to brake control both motors M1 and M2, the torque generation range will be twice that of the case where brake control is performed by a conventional device. Become.

(B) Taper tension control Taper tension control refers to a control method in which the tension of the winding yarn is continuously decreased or increased as described above. In this case, normally motors M1 and M2
One of them is assigned to perform power running control, and the other is assigned to perform braking control. In the following explanation, the movable contact C' of the changeover switch S1' of the control circuit 2-1 is set to the fixed contact A' to switch the motor M.
A case will be explained in which the movable contact C' of the changeover switch S2' of the control circuit 2-2 is set to be closed to the fixed contact B', and the motor M2 is made to take charge of the braking control. In this case, the control circuit 2-
The movable contact C of the changeover switch S1 is the fixed contact B.
is input to the switch S2 of the control circuit 2-2.
It is assumed that the movable contact C is connected to the fixed contact A. Further, it is assumed that the operator of the yarn winding device continuously rotates the knob of the torque setting device 3 to generate a voltage signal ranging from -V to 0 to +V as the torque setting signal TV.

As explained above, the changeover switches S1, S2, S
1' and S2' and further output the torque setting signal TV, the control circuit 2-1 operates and the motor M1 performs power running control when the torque setting signal TV is between -V and 0. That is, since the negative torque setting signal TV is inverted to a positive torque setting signal by the inverting amplifier 211 of the control circuit 2-1, the torque corresponding to this torque setting signal TV is applied to the motor M1.
It arises from On the other hand, motor M2 does not generate torque at this time. The reason for this is that since a negative torque setting signal is input to the comparator 222 of the control circuit 2-2, the control circuit 2-2 does not function at all and no current is supplied to the motor M2 from the thyristor rectifier circuit 225. .

Torque setting signal TV gradually increases from 0 to +V
Then, the control circuit 2-2 operates and the motor M2 performs braking control. At this time,
The comparator 212 of the control circuit 2-1 includes an inverting amplifier 2.
Since the torque control signal TV which has been negatively inverted by M11 is input, the motor M1 does not generate any torque.

As is clear from the above description, according to this embodiment, it is possible to continuously perform power running control to braking control, and conversely, from braking control to power running control.
In the above embodiment, the torque setting device 3 was explained as being operated by the operator, but automatic operation can be achieved by automatically changing the setting state of the torque setting device 3 as the winding operation progresses. It becomes possible.
For example, since the diameter of the winding beam B2 increases as winding progresses, the torque setting device 3 may be controlled by detecting this.

Incidentally, in the above explanation, motor M1 is in charge of power running control and motor M2 is in charge of braking control, but needless to say, it is also possible to conversely have motor M1 be in charge of braking control and motor M2 to be in charge of power running control. good. Furthermore, during constant tension control, the current flowing through the motor is directly detected by a current detector, thereby detecting changes in the winding tension. However, the present invention is not limited to this, and can detect changes in the winding tension itself. The winding torque may be changed by detecting this signal and feeding it back to the comparators 212 and 222.

Furthermore, although two DC motors are used in the above embodiment, the tension adjustment range can be expanded by using a plurality of DC motors and appropriately sharing the generation of power running torque and braking torque. In this case, the taper tension control can be performed by appropriately setting the operating range of the comparator circuit (corresponding to the comparators 212 and 222 in the above embodiment) used in the control circuit of each motor with respect to the torque setting signal TV. It is also possible to perform the process over a wide tension range.

As is clear from the above description, according to the tension adjustment device of the present invention, a plurality of motors are installed to drive the take-up roll, each motor is continuously controlled in the same direction, and each motor is Since only powering control or braking control is performed, it is possible to change take-up roll control from powering control to braking control or vice versa without any problem. Therefore, it has become possible to taper tension control the tension of the winding yarn with a simple control device without using a special motor.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing an example of a control circuit used in the embodiment shown in FIG. B1... Sending beam, B2... Winding beam,
TR...Take a roll, 2-1, 2-2...
...Control circuit, M1, M2...Take-up roll, 3...Torque setting device drive motor.

Claims (1)

[Claims] 1. A plurality of motors that can be continuously controlled only within a range where the polarity of an applied voltage for driving a take-up roll interposed between a sending beam and a take-up beam does not change; A torque setting device that outputs a torque setting signal that continuously changes from positive to negative or from negative to positive in order to give a continuous torque change to the motor. and a control circuit that controls the magnitude of the take-up roll and switches control of the take-up roll from control by one motor to control by the other motor when the polarity of the setting signal changes. Adjustment device. 2. The device according to claim 1, wherein the torque setting signal changes in response to a change in the winding diameter of the winding beam.