JP2013185281A - Yarn twisting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn twisting machine which can be continuously operated without being brought to an emergency stop when electric power is recovered shortly after an electric power failure.SOLUTION: A yarn twisting machine 100 includes: a plurality of spindles 24; a plurality of spindle motors 25 each of which is provided for a corresponding one of the plurality of spindles 24 and rotates the corresponding one of the plurality of spindles 24; an inverter 4 which supplies electric power to the plurality of spindle motors 25; and switching sections 5 which switch connection states between the inverter 4 and the plurality of spindle motors 25. The yarn twisting machine 100 further includes: a detection section 6 which detects the operation voltage of the electric power supplied from the inverter 4; and control sections 7 which receive signals from the detection section 6 and can transmit signals to the switching sections 5. The control sections 7 control the switching sections 5 on the basis of the signals from the detection section 6.

Description

  The present invention relates to a technique of a twisting machine that twists a plurality of spun yarns.

  Conventionally, a twisting machine for twisting a plurality of spun yarns is known (see, for example, Patent Document 1). The twisting machine turns the spun yarn unwound from another package around the spun yarn unwound from one package and twists the spun yarns together.

  By the way, such a twisting machine is configured to make an emergency stop when the operating voltage becomes lower than a predetermined value. For this reason, in the twisting machine, when power supply is lost due to a power failure or the like, the operating voltage decreases and an emergency stop occurs (see the two-dot chain line in the region A in FIG. 4). In particular, in recent years, the power consumption has increased with an increase in the size of the twisting machine, that is, with an increase in the number of spindles. Therefore, the operating voltage is rapidly lowered to cause an emergency stop. Therefore, even when the power failure is recovered immediately (when it is a so-called instantaneous stop), there is a problem that an emergency stop has already been reached.

  Moreover, such a twisting machine is configured to make an emergency stop when the operating voltage becomes higher than a predetermined value. Therefore, in a twisting machine configured to obtain regenerative power by using inertial rotation of a spindle or the like at the time of a power failure, even if an emergency stop due to a decrease in the operating voltage is avoided, the operating voltage rises due to the regenerative power, leading to an emergency stop. (Refer to the broken line in the region B in FIG. 4). Particularly in recent years, the amount of power generated by regenerative power has increased with the increase in the size of the twisting machine, i.e., the increase in the number of spindles, so that the operating voltage rapidly rises to an emergency stop. Therefore, even if the power failure is recovered immediately (when it is a so-called instantaneous power failure), there has been a problem that an emergency stop has already been reached due to an increase in operating voltage due to regenerative power.

JP 2008-13860 A

  The present invention has been made to solve such problems, and an object of the present invention is to provide a twisting machine capable of continuing operation without reaching an emergency stop if a power failure is recovered immediately.

The first invention is
Multiple spindles,
A spindle motor which is provided for each of the plurality of spindles and rotates the spindle;
An inverter for supplying power to the plurality of spindle motors;
In a twisting machine comprising a switching unit that switches a connection state between the inverter and the plurality of spindle motors,
A detection unit for detecting an operating voltage of power supplied from the inverter;
A control unit capable of receiving a signal from the detection unit and transmitting a signal to the switching unit;
The control unit controls the switching unit based on a signal from the detection unit.

The second invention is the twisting machine according to the first invention,
A plurality of the switching units are provided,
When it is determined that a power failure has occurred based on a signal from the detection unit, the control unit controls the switching unit to cut off power supplied to at least some of the spindle motors.

3rd invention is the twisting machine which concerns on 1st or 2nd invention,
The spindle motor has a function of generating regenerative power by inertial rotation of the spindle,
When it is determined that a power failure has occurred based on a signal from the detection unit, the control unit controls the switching unit to cut off regenerative power generated by at least a part of the spindle motor.

4th invention is the twisting machine which concerns on either 2nd or 3rd invention,
When the control unit determines that it has recovered from a power failure based on a signal from the detection unit, the control unit controls the switching unit that cuts off power and transmits power supplied to the spindle motor. did.

5th invention is the twisting machine which concerns on 4th invention,
The controller controls the spindle motor so that the rate of increase in the rotational speed of the spindle motor when it recovers from a power failure is greater than that at the start of normal operation.

6th invention is the twisting machine which concerns on either 4th or 5th invention,
The control unit is configured to transmit the power supplied to the spindle motor by controlling the plurality of switching units that have cut off the power in stages while shifting the timing.

A seventh invention is a twisting machine according to any one of the second to sixth inventions,
An input unit capable of inputting information to the control unit;
The input unit can select the switching unit that is controlled when a power failure occurs among the plurality of switching units.

The eighth invention is a twisting machine according to any one of the first to seventh inventions,
Dividing the twist unit composed of the spindle motor or the like into a predetermined quantity,
The controller is provided for each section of the twisted yarn unit.

A ninth invention is a twisting machine according to any one of the first to eighth inventions,
An inverter;
A bus connected to the inverter;
A plurality of distribution lines connected to the bus,
The plurality of spindle motors and the plurality of switching units are arranged on the distribution lines and constitute a parallel circuit.

The tenth invention is a twisting machine according to any one of the first to ninth inventions,
The inverter supplies power to all the spindle motors.

The eleventh invention is
A spindle,
A spindle motor for rotating the spindle;
A plurality of switching units that transmit or cut off power supplied to the spindle motor;
A detection unit for detecting an operating voltage of power supplied from a power source;
A control unit capable of receiving a signal from the detection unit and transmitting a signal to the plurality of switching units, and a control method for a twisting machine comprising:
The control unit controls the switching unit when it is determined that a power failure has occurred based on a signal from the detection unit.

  As effects of the present invention, the following effects can be obtained.

  According to 1st invention, a control part controls a switching part based on the signal from a detection part. Thereby, the spindle motor can be disconnected from the electrical system.

  According to the second invention, when the control unit determines that a power failure has occurred based on the signal from the detection unit, the control unit controls the switching unit to cut off the power supplied to at least some of the spindle motors. . Thereby, the power consumption at the time of a power failure can be reduced, and it becomes possible to prevent the operating voltage from decreasing rapidly. Therefore, an emergency stop can be avoided if the power failure is recovered immediately.

  According to the third invention, when the control unit determines that a power failure has occurred based on the signal from the detection unit, the control unit controls the switching unit to cut off the regenerative power generated by at least some of the spindle motors. . As a result, the amount of regenerative power generated during a power failure can be reduced, and a rapid increase in operating voltage can be prevented. Therefore, an emergency stop can be avoided if the power failure is recovered immediately.

  According to the fourth invention, when the control unit determines that the power has recovered from the power failure based on the signal from the detection unit, the control unit controls the switching unit that cuts off the power and supplies the power supplied to the spindle motor. Communicate. As a result, the spindle can be properly rotated after recovering from the power failure, and the operation state before the power failure can be restored. Therefore, the operation can be continued unless the power failure is recovered immediately and an emergency stop is reached.

  According to the fifth aspect of the invention, the control unit performs control so that the rate of increase in the rotational speed of the spindle motor when recovering from a power failure is greater than that at the start of normal operation. Thereby, after recovering from a power failure, the spindle can be brought to an appropriate rotation speed in a short time, and can be returned to the operating state before the power failure. Therefore, the operation can be continued unless the power failure is recovered immediately and an emergency stop is reached. Moreover, it becomes possible to stabilize the quality of the spun yarn twisted continuously from before the power failure to after the power failure.

  According to the sixth aspect of the invention, the control unit controls the plurality of switching units that have cut off the power in stages to shift the timing to transmit the power supplied to the spindle motor. Thereby, it is possible to prevent a rapid decrease in the operating voltage and a rapid increase in the operating voltage, and to make a gradual change. Therefore, it is possible to further stabilize the quality of the spun yarn continuously twisted from before the power failure to after the power failure.

  According to the seventh invention, the input unit can select a switching unit to be controlled when a power failure occurs among the plurality of switching units. Thereby, it becomes possible to set arbitrarily the power consumption at the time of a power failure.

  According to the eighth invention, the control unit is provided for each section of the twisting unit. Thereby, it becomes possible to perform detailed control according to the operation state of each section.

  According to the ninth aspect, the spindle motor and the plurality of switching units are arranged on the respective distribution lines to form a parallel circuit. Thereby, it becomes possible to make an electric system a simple structure.

  According to the tenth aspect, the inverter supplies power to all the spindle motors. Thereby, it becomes possible to make an electric system a simple structure.

  According to the eleventh aspect, the control unit controls the switching unit when determining that a power failure has occurred based on a signal from the detection unit. As a result, the spindle motor can be disconnected from the electrical system, and a rapid change in the operating voltage can be prevented. Therefore, an emergency stop can be avoided if the power failure is recovered immediately.

The figure which shows the whole structure of the twisting machine. The figure which shows the structure of the twist unit 1. The figure which shows the electric system of the twisting machine. The figure which shows the change of the operating voltage at the time of a power failure.

  First, the twisting machine 100 which concerns on one Embodiment of this invention is demonstrated.

  FIG. 1 is a diagram illustrating an overall configuration of the twisting machine 100. FIG. 2 is a diagram showing a configuration of the twisting unit 1. The arrows in FIG. 1 indicate the feeding directions of the spun yarns Y, Ya, and Yb. In addition, the arrows in FIG. 2 indicate the operation direction of the members (such as the traverse guide 32) constituting the twisted yarn unit 1 in addition to the feeding direction of the spun yarn Y, Ya, Yb.

  The twisting machine 100 creates a spun yarn (hereinafter referred to as “twisted yarn”) Y by twisting the spun yarn Ya and the spun yarn Yb. In addition, the twisting machine 100 winds the twisted yarn Y to create the package P. More specifically, the twisting machine 100 includes a plurality of twisting units 1 in the longitudinal direction, and each twisting unit 1 twists the spun yarn Ya and the spun yarn Yb to create a twisted yarn Y. Then, each twisted yarn unit 1 creates a package P by winding the twisted yarn Y. The unit of the quantity of the twisted yarn unit 1 is called “weight”. As described above, the power consumption and the amount of power generated by regenerative power increase as the number of spindles increases.

  The twisted yarn unit 1 is mainly composed of a twisted yarn portion 2 and a winding portion 3.

  The twisted yarn portion 2 creates a twisted yarn Y by twisting the spun yarn Ya unwound from the first package P1 and the spun yarn Yb unwound from the second package P2. The twisted yarn Y is sent to the yarn feeding roller 22 by the guide roller 21. Thereafter, the twisted yarn Y is sent out by the rotating yarn feed roller 22 and then sent to the winding unit 3 by the guide roller 23. The detailed configuration of the twisted yarn portion 2 will be described later.

  The winding unit 3 creates the package P by winding the twisted yarn Y. More specifically, the winding unit 3 causes the bobbin B to be driven and rotated by the touch roller 31 that is driven to rotate, and the bobbin B winds the twisted yarn Y to create the package P. In addition, since the winding part 3 traverses the twisted yarn Y by the traverse guide 32, the twist of the twisted yarn Y in the package P is prevented (see FIG. 2). The bobbin B is supported so as to be swingable with respect to the frame 33. For this reason, even when the twisted yarn Y is wound up and the outer diameter of the package P is increased, the touch roller 31 and the package P are in contact with each other with a constant load.

  Next, a detailed configuration of the twisted yarn portion 2 will be described.

  As described above, the twisted yarn portion 2 creates the twisted yarn Y by twisting the spun yarn Ya unwound from the first package P1 and the spun yarn Yb unwound from the second package P2. More specifically, the twisted yarn portion 2 unwinds the spun yarn Ya from the first package P1, and turns the spun yarn Yb unwound from the second package P2 around the spun yarn Ya to turn the twisted yarn Y. Create The twisted yarn portion 2 is mainly composed of a spindle 24 and a spindle motor 25.

  The spindle 24 unwinds the spun yarn Ya from the first package P1 by rotating. The spindle 24 is arranged in a state of being inserted into the bobbin B1 of the first package P1. A yarn guide 241 is provided at the tip of the spindle 24, and the spun yarn Ya is unwound by the rotation of the yarn guide 241. Thereafter, the spun yarn Ya is sent to the length adjuster 27 via the tension applying device 26 disposed above.

  Further, the spindle 24 rotates to rotate the spun yarn Yb unwound from the second package P2. A rotary disk 242 is provided at the end of the spindle 24, and the spun yarn Yb is turned by the rotation of the rotary disk 242. Thereafter, the spun yarn Yb is sent to the length adjuster 27 while turning around the outer periphery of the cover 28 in which the first package P1 is accommodated.

  The spindle motor 25 rotates the spindle 24. The spindle motor 25 according to the present embodiment is a so-called three-phase AC motor, but other types of motors may be used and the type thereof is not limited. The spindle motor 25 has a function of generating regenerative power by using inertial rotation of the spindle 24 at the time of power failure. That is, the spindle motor 25 of the present twisting machine 100 has a role as a power generation device at the time of a power failure in addition to the role of rotating the spindle 24.

  Next, the electrical system of the twisting machine 100 will be described.

  FIG. 3 is a diagram illustrating an electrical system of the twisting machine 100. The electric system of the twisting machine 100 is divided into a first section S1 to an Nth section SN configured by four twisting yarn units 1.

  The electric system of the twisting machine 100 mainly includes a spindle motor 25, an inverter 4, a switching unit 5, a detection unit 6, and a control unit 7.

  The inverter 4 converts AC power input from a power source into AC power having an arbitrary frequency and supplies the AC power to the spindle motor 25. The inverter 4 converts a converter circuit that converts AC power into DC power, a capacitor that smoothes the DC power obtained by the converter circuit, and converts DC power smoothed by the capacitor into AC power having an arbitrary frequency. An inverter circuit. For this reason, the inverter 4 can supply AC power with no distortion in the waveform to the spindle motor 25. In addition, at the time of a power failure, since the electric power stored in the capacitor is discharged, the operating voltage gradually decreases (refer to region A in FIG. 4).

  The switching unit 5 transmits or blocks power supplied to the spindle motor 25. The switching unit 5 includes a contact 51 that switches an energization state of the electric circuit, and an electromagnetic coil 52 that operates the contact 51. The switching unit 5 excites the electromagnetic coil 52 based on a signal from the control unit 7. For this reason, the switching unit 5 can transmit or block the power supplied to the spindle motor 25 based on the signal from the control unit 7.

  The detector 6 detects the operating voltage of the power supplied from the power source. The detection unit 6 includes a diode that converts AC power into DC power and a sensor that measures the voltage of the DC power obtained by the diode. For this reason, the detection part 6 can detect the operating voltage of the electric power supplied from a power supply. The operating voltage detected by the detection unit 6 is transmitted to the control unit 7 and the input unit 8 described later.

  The control unit 7 receives signals from the detection unit 6 and transmits signals to the plurality of switching units 5. The control unit 7 includes a central processing unit (CPU) that gives operation instructions based on various data, and a storage unit (ROM) that stores various programs. For this reason, the control unit 7 can determine the occurrence or recovery of the power failure based on the signal from the detection unit 6, and can control the switching unit 5.

  The technical idea of the present invention and the effects thereof will be described below. FIG. 4 is a diagram illustrating changes in the operating voltage during a power failure. In addition, this invention has a big effect, when it recovers immediately after a power failure generate | occur | produces (when it is what is called instantaneous power failure). Here, the instantaneous power failure can be defined as a power failure in which the time from occurrence of power failure to recovery is less than 1 second. However, the present invention does not specifically limit the time when the power supply is lost.

  As a first characteristic point of the present twisting machine 100, the control unit 7 controls the switching unit 5 when it is determined that a power failure has occurred based on a signal from the detection unit 6. This is because the spindle motor 25 is disconnected from the electric system to prevent a rapid change in the operating voltage.

  Specifically, in the conventional twisting machine, when the power supply is lost due to a power failure or the like, the operating voltage rapidly decreases (see the two-dot chain line in the region A in FIG. 4). And the conventional twisting machine will reach an emergency stop, if an operating voltage becomes lower than predetermined value Vmin. Further, in the conventional twisting machine configured to obtain regenerative power by using inertial rotation of a spindle or the like at the time of a power failure, the operating voltage is rapidly increased by the regenerative power even if an emergency stop due to a decrease in the operating voltage is avoided (FIG. 4). (See broken line in middle B region). And the conventional twisting machine will reach an emergency stop, if an operating voltage becomes higher than predetermined value Vmax. On the other hand, the present twisting machine 100 prevents the rapid change of the operating voltage by disconnecting the spindle motor 25 from the electric system (see the solid lines in the A and B regions in FIG. 4). Therefore, this twisting machine 100 can avoid an emergency stop if the power failure is recovered immediately.

  The first feature point described above will be described in more detail. That is, when the control unit 7 determines that a power failure has occurred based on the signal from the detection unit 6, the control unit 7 controls the predetermined switching unit 5 to cut off the power supplied to some of the spindle motors 25. Let Thereby, the power consumption at the time of a power failure can be reduced, and it becomes possible to prevent a rapid fall of an operating voltage (refer the continuous line of A area | region in FIG. 4). Therefore, this twisting machine 100 can avoid an emergency stop if the power failure is recovered immediately.

  In addition, controlling the predetermined switching unit 5 to cut off the power supplied to some of the spindle motors 25 leads to cutting off the regenerative power generated by the spindle motors 25. As a result, the amount of power generated by regenerative power during a power failure can be reduced, and a rapid increase in operating voltage can be prevented (see the solid line in region B in FIG. 4). Therefore, this twisting machine 100 can avoid an emergency stop if the power failure is recovered immediately.

  As a second characteristic point of the present twisting machine 100, the control unit 7 controls the switching unit 5 when it is determined that recovery from a power failure is made based on a signal from the detection unit 6. This is because the spindle motor 25 is connected to the electric system to return to the operating state before the power failure. Therefore, the present twisting machine 100 can continue the operation unless the power failure is recovered immediately and an emergency stop is reached.

  The second feature point described above will be described in more detail. That is, when the control unit 7 determines that the power has recovered from the power failure based on the signal from the detection unit 6, the control unit 7 controls the switching unit 5 that has cut off the power to transmit the power supplied to the spindle motor 25. . Thereby, after recovering from a power failure, the spindle 24 can be properly rotated, and the operation state before the power failure can be restored. Therefore, the present twisting machine 100 can continue the operation unless the power failure is recovered immediately and an emergency stop is reached.

  In the present twisting machine 100, the rotational speed increase rate of the spindle motor 25 is set large in order to restore the rotational speed of the spindle 24 in a short time after recovering from the power failure. That is, the control unit 7 performs control so that the rotational speed increase rate of the spindle motor 25 at the time of recovery from the power failure becomes larger than the rotational speed increase rate at the start of normal operation. Thereby, after recovering from a power failure, the spindle 24 can be set to an appropriate rotation speed in a short time, and it is possible to return to the operation state before the power failure. Therefore, the present twisting machine 100 can continue the operation unless the power failure is recovered immediately and an emergency stop is reached. Moreover, it becomes possible to stabilize the quality of the twisted yarn Y twisted continuously from before the power failure to after the power failure.

  As a third feature of the present twisting machine 100, the control unit 7 controls the plurality of switching units 5 that have cut off the electric power in stages while shifting the timing. This is to prevent a rapid decrease in the operating voltage and a rapid increase in the operating voltage, and to make a gradual change.

  For example, when the control unit 7 determines that a power failure has occurred, the control unit 7 controls the four switching units 5 configuring the first section S1 to cut off the power, and configures the second section S2 after a predetermined time has elapsed. The four switching units 5 are controlled to cut off power. Similarly, when the control unit 7 determines that the power has recovered from the power failure, the control unit 7 controls the four switching units 5 configuring the first section S1 to transmit power, and configures the second section S2 after a predetermined time has elapsed. The four switching units 5 are controlled to transmit power. Thus, the present twisting machine 100 controls the plurality of predetermined switching units 5 in a stepwise manner to prevent a rapid decrease in the operating voltage and a rapid increase in the operating voltage, and to make a gradual change. (Refer to the solid lines in the A area and the B area in FIG. 4). Therefore, the present twisting machine 100 can further stabilize the quality of the twisted yarn Y twisted continuously from before the power failure to after the power failure.

  In addition, this twisting machine 100 is provided with the control part 7 for every division (refer FIG. 3). Thereby, this twisting machine 100 becomes possible to perform detailed control according to the driving | running state of each division. Accordingly, it is possible to control a part of the four switching units 5 constituting each section and to control the rest after a predetermined time has elapsed.

  Next, other features of the present twisting machine 100 will be described.

  The present twisting machine 100 includes an input unit 8 that can input information to the control unit 7 (see FIG. 3). And the input part 8 enables selection of the switching part 5 controlled when a power failure occurs. Thereby, this twisting machine 100 can set the power consumption at the time of a power failure arbitrarily.

  The present twisting machine 100 includes a bus 41 connected to the inverter 4 and a plurality of distribution lines 42 connected to the bus 41 (see FIG. 3). The spindle motor 25 and the switching unit 5 are arranged on the respective distribution lines 42 and constitute a parallel circuit. With such a configuration, the inverter 4 can supply power to all the spindle motors 25. Thereby, it becomes possible to make an electric system a simple structure.

DESCRIPTION OF SYMBOLS 100 Twisting machine 1 Twisting thread unit 2 Twisting part 24 Spindle 25 Spindle motor 3 Winding part 4 Inverter 41 Bus line 42 Distribution wiring 5 Switching part 51 Contact 52 Electromagnetic coil 6 Detection part 7 Control part 8 Input part P Package Ya Spinning yarn Yb Spinning yarn Y twisted yarn (spun yarn)

Claims (11)

Multiple spindles,
A spindle motor which is provided for each of the plurality of spindles and rotates the spindle;
An inverter for supplying power to the plurality of spindle motors;
In a twisting machine comprising a switching unit that switches a connection state between the inverter and the plurality of spindle motors,
A detection unit for detecting an operating voltage of power supplied from the inverter;
A control unit capable of receiving a signal from the detection unit and transmitting a signal to the switching unit;
The control unit controls the switching unit based on a signal from the detection unit. A plurality of the switching units are provided,
When the control unit determines that a power failure has occurred based on a signal from the detection unit, the control unit controls the switching unit to cut off power supplied to at least a part of the spindle motor. The twisting machine according to claim 1. The spindle motor has a function of generating regenerative power by inertial rotation of the spindle,
When the control unit determines that a power failure has occurred based on a signal from the detection unit, the control unit controls the switching unit to cut off regenerative power generated by at least a part of the spindle motor. The twisting machine according to claim 1 or 2.   When the control unit determines that the power has recovered from the power failure based on the signal from the detection unit, the control unit controls the switching unit that cuts off the power to transmit the power supplied to the spindle motor. The twisting machine according to claim 2 or 3, characterized in that.   The twisting machine according to claim 4, wherein the control unit controls the spindle motor so that the rate of increase in the rotational speed of the spindle motor when recovered from a power failure is greater than that at the start of normal operation.   5. The control unit according to claim 4, wherein the control unit is configured to control the plurality of switching units that have cut off the power in a stepwise manner so as to transmit the power supplied to the spindle motor. 5. The twisting machine according to 5. An input unit capable of inputting information to the control unit;
The said input part enables selection of the said switch part controlled when a power failure generate | occur | produces among these switch parts, The Claim 2 to Claim 6 characterized by the above-mentioned. Twisting machine. Dividing the twist unit composed of the spindle motor or the like into a predetermined quantity,
The twisting machine according to any one of claims 1 to 7, wherein the control unit is provided for each section of the twisting unit. An inverter;
A bus connected to the inverter;
A plurality of distribution lines connected to the bus,
The twisted yarn according to any one of claims 1 to 8, wherein the plurality of spindle motors and the plurality of switching units are arranged on the respective distribution lines to form a parallel circuit. Machine.   The twisting machine according to any one of claims 1 to 9, wherein the inverter supplies power to all the spindle motors. A spindle,
A spindle motor for rotating the spindle;
A plurality of switching units that transmit or cut off power supplied to the spindle motor;
A detection unit for detecting an operating voltage of power supplied from a power source;
A control unit capable of receiving a signal from the detection unit and transmitting a signal to the plurality of switching units, and a control method for a twisting machine comprising:
The control method for a twisting machine, wherein the control unit controls the switching unit when it is determined that a power failure has occurred based on a signal from the detection unit.

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