EP0942081B1 - Individual-spindle-drive type textile machine - Google Patents
Individual-spindle-drive type textile machine Download PDFInfo
- Publication number
- EP0942081B1 EP0942081B1 EP99103458A EP99103458A EP0942081B1 EP 0942081 B1 EP0942081 B1 EP 0942081B1 EP 99103458 A EP99103458 A EP 99103458A EP 99103458 A EP99103458 A EP 99103458A EP 0942081 B1 EP0942081 B1 EP 0942081B1
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- EP
- European Patent Office
- Prior art keywords
- spindle
- drive motor
- winding
- control
- rotation speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/20—Driving or stopping arrangements
- D01H1/32—Driving or stopping arrangements for complete machines
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/20—Driving or stopping arrangements
- D01H1/24—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles
- D01H1/244—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles each spindle driven by an electric motor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Control Of Multiple Motors (AREA)
Description
- The present invention relates to an individual-spindle-drive type textile machine.
- As shown in Figure 13, a conventional multi-twister comprises a plurality of multi-twisting units each having a
spindle apparatus 301a and awinding apparatus 301b. The multi-twisting unit has adriving mechanism 310 for drivingwinding drums 306,traverse guides 307, andspindles 303. Eachspindle apparatus 301a uses abelt 304 to transmit the driving force of adrive motor 313 to thespindles 303 in order to twist yarn. Each windingapparatus 301b winds a yarn twisted by thespindle apparatus 301a around awinding package 305, while traversing the yarn via afeed roller 308 using thetraverse guide 307. - The
driving mechanism 310 mainly comprises adrive motor 313, a plurality ofpulleys belts single drive motor 313 drives thewinding drums 306, thetraverse guides 307, and thespindles 303. The output of thedrive motor 313 is transmitted through anoutput shaft 314, thethird pulley 315, thebelt 318, thefifth pulley 317, and thefirst pulley 311 to therunning belt 304 to drive thespindles 303. In addition, the output of thedrive motor 313 is transmitted through theoutput shaft 314, thefourth pulley 316, abelt 320, thesixth pulley 319, a speedchanging belt apparatus 350, aspeed reducing box 323, and abelt 330 to drive thewinding drums 306. Moreover, the rotation of asupport shaft 326 is transmitted via abelt 334 to agrooved drum 337, which then rotates to move acam shoe 339 along agroove 338, thereby reciprocating thetraverse guides 307. - When the
single drive motor 313 drives thespindle apparatus 301a and thewinding apparatus 301b as in the conventional multi-twister, thebelts - However, in such a multi-twister, when power stoppage causes each motor to be stopped (braked), due to the inertia moment of the spindle drive system, which is larger than that of the winding drum drive system, the motor for the spindle drive system rotates by inertia for a certain period of time after the winding drive system has stopped, resulting in twisting cuts caused by excessive twisting of yarn.
- Accordingly, multi-twisters have been developed that can decelerate and stop the spindle drive system motor and the drum drive system motor synchronously upon power stoppage to prevent twisting cuts as disclosed in US 5 196 769 A.
- Since, however, these multi-twisters use different motors to drive the winding drum and the traverse apparatus, the winding drum, the traverse apparatus and the spindle drive system must all be operated in perfect synchronization in order to prevent a stitching (the yarn becomes separated from the package.) or a straight winding, thereby requiring sophisticated control.
- In view of this problem, the object of the present invention is to provide, upon power stoppage, an individual-spindle-drive type textile machine that can synchronously decelerate and stop the spindle drive motor and the drum drive motors using simple control mechanisms.
- This object is accomplished by the features defined in the characterizing portion of
claim 1. - Thus, after a power stoppage has been detected due to a power supply voltage drop lasting a predetermined period of time, feedback control is provided while the rotation speed of each motor is detected independently for each rotation speed control apparatus. This control is performed continuously until the motor stops. This configuration eliminates the need to transmit rotation speed signals between the inverters and the need to provide an external rotation speed instruction means for each inverter. Further, this configuration can decelerate and stop each motor while synchronizing them together using simple control operations.
- According to
claim 2 by appropriately setting the time at which each motor stops in response to the detection of power stoppage, regenerative power generated by the spindle drive motor having a larger inertia increases the direct-current through the direct-current bus while the motor is decelerating. This power can be used to allow inverter for the winding drum drive motor to provide feedback control. Accordingly, the motors can be synchronously decelerated and stopped without the use of a special external power supply. - According by
claim 3 upon the detection of a power stoppage, the inverters decelerate synchronously and stop simultaneously in response to the stop instruction from the central control apparatus. Consequently, the central control apparatus can use simple control functions to synchronously decelerate and stop the motors by simply transmitting the stop instruction. In addition, this configuration can obviate the needs for batteries or cells for controlling the central control apparatus during power stoppage. - According to
claim 5 the spindle drive motor is a brushless motor having a built-in sensor for detecting the rotational position of the rotor, the sensor being incorporated in a stator section located around a rotor that is a permanent magnet. - Thus, since the sensor for detecting the rotational direction of the rotor is built into the motor, the rotation of the motor can be controlled while reliably preventing errors in detection caused by fiber dust. In addition, the use of the brushless motor can help make each motor compact and improve motor efficiency.
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- Figure 1 describes an individual-spindle-drive type multi-twister according to a first embodiment of the present invention.
- Figure 2 describes a winding apparatus and a spindle apparatus in an individual-spindle-drive type multi-twister in Figure 1.
- Figure 3 is a block diagram describing power stoppage processing in an individual-spindle-drive type multi-twister in Figure 1.
- Figure 4 is a flowchart describing the operation of the power stoppage processing in an individual-spindle-drive type multi-twister.
- Figure 5 describes an individual-spindle-drive type multi-twister according to a second embodiment of the present invention.
- Figure 6 describes a winding apparatus and a spindle apparatus in an individual-spindle-drive type multi-twister shown in Figure 5.
- Figure 7 is a block diagram describing a control system in an individual-spindle-drive type multi-twister shown in Figure 5.
- Figure 8 is a block diagram describing another example control system.
- Figure 9 describes an individual-spindle-drive type multi-twister according to a third embodiment of the present invention.
- Figure 10 describes a winding apparatus and a spindle apparatus in an individual-spindle-drive-type multi-twister shown in Figure 9.
- Figure 11 is a block diagram describing the control system in an individual-spindle-drive type multi-twister shown in Figure 9.
- Figure 12 describes activation times for a spindle drive motor and a winding package in an individual-spindle-drive type multi-twister shown in Figure 9.
- Figure 13 describes a conventional multi-twister.
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- A first embodiment of the present invention will be described with reference to Figures 1 to 4.
- An individual-spindle-drive type multi-twister 1 is composed of 80 to 308 yarn winding units U for the corresponding spindle units installed in a line, as shown in Figure 1. A single yarn winding unit U for the corresponding spindle unit has a
spindle apparatus 2 and awinding apparatus 3 connected to thespindle apparatus 2 so that yarn on asingle supply package 8 is wound around a winding package P. - The
spindle apparatus 2 has thesupply package 8, a stationary plate 31, atension apparatus 32, a rotatingdisc 33, and aspindle drive motor 6 that twists a yarn Y. Thespindle drive motor 6 comprises a direct-current brushless motor BLM, and the rotatingdisc 33 is disposed on its output shaft. The stationary plate 31 is provided on the rotatingdisc 33 so that asingle supply package 8 can be placed on the stationary plate 31. Furthermore, thetension apparatus 32 is provided on thesupply package 8 to apply a predetermined tension to yarn Y released from thesupply package 8. - Thus, the
spindle apparatus 2 places the yarn Y unwound from thesupply package 8 in thetension apparatus 32 to apply a tension to it while using thedrive motor 6 to rotate the rotatingdisc 33 at a high speed to balloon the yarn Y to aballoon guide 37. In addition, the yarn Y is twisted once between thetension apparatus 32 and the rotatingdisc 33, and is twisted again between the rotatingdisc 33 and theballoon guide 37. - As shown in Figure 2. the
winding apparatus 3 has a windingdrum 21, the winding package P, atraverse guide 29, afeed roller 26, and acradle 40 to wind the yarn Y twisted by thespindle apparatus 2 around the winding package P. The winding package P is rotatably supported by thecradle 40, and thewinding drum 21 pressure-contacts the winding package P. Thus, after passing the yarn, which has been twisted twice as described above, from theballoon guide 37 through theguide rollers feed roller 26, thewinding apparatus 3 winds the yarn around the winding package P while traversing it using thetraverse guide 29. - As shown in Figure 1, the multi-twister has not only the yarn winding unit U described above but also a
drive system 5 for driving thewinding apparatuses 3 concurrently and a control system 7 for controlling each spindle.apparatus 2 and eachwinding apparatus 3. Thedrive system 5 has a winding drum drive motor 4, afirst pulley 10, abelt 113, asecond pulley 12, aspeed reducing apparatus 11, athird pulley 16, avariable speed changer 17, afourth pulley 19, abelt 20, afifth pulley 22, asixth pulley 24, and acam box 27. Thedrive system 5 uses the driving force of the winding drum drive motor 4 to rotate thewinding drum 21 and thefeed roller 26 of each yarn winding unit U while thetraverse guide 29 moves reciprocally. - The winding drum drive motor 4 is an induction motor 1M. The motor 4 has the
first pulley 10 on its output shaft, and thesecond pulley 12 is provided for the motor 4 via thebelt 13. Thespeed reducing apparatus 11 has a plurality of gears (not shown in the drawings) and decelerates at a specified rate while changing its rotational direction when the driving force of the winding drum drive motor 4 is transmitted via thesecond pulley 12. In addition, thespeed reducing apparatus 11 has twooutput shafts third pulley 16 is fitted on thefirst output shaft 14, and theother output shaft 15 is connected to thevariable speed changer 17 to change a winding angle. - The
fourth pulley 19 fitted on thesupport shaft 18 is connected to thethird pulley 16 via thebelt 20, and the plurality of the windingdrums 21 are provided on thesupport shaft 18 at a predetermined interval. In addition, thefifth pulley 22 is fitted on thesupport shaft 18 in a line to thefourth pulley 19. Thesixth pulley 24 fitted on thesupport shaft 23 is connected to thefifth pulley 22, and the plurality of thefeed rollers 26 are provided on thesupport shaft 23 at a predetermined interval. Thus, thedrive system 5 transmits a driving force reduced by thespeed reducing apparatus 11 to each windingdrum 21 via thethird pulley 16, thebelt 20, and thefourth pulley 19. Thedrive system 5 also transmits a driving force to thefeed roller 26 via thefifth pulley 22, thebelt 25, and thesixth pulley 24. - The
variable speed changer 17 is connected to thecam box 27, which transforms a rotational force into a reciprocating motion. The reciprocatingrod 28 is connected to thecam box 27, and the traverse guides 29 are fitted on the reciprocatingrod 28 at a predetermined interval. Thus, thedrive system 5 causes thetraverse guide 29 to reciprocate so as to traverse the yarn Y twisted by thespindle apparatus 2 while winding the yarn Y around the winding package P, which is rotated while pressure-contacting the windingdrum 21. - As shown in Figure 3, the control system 7 not only controls the
spindle apparatus 2 and the windingapparatus 3 but also acts as a power stoppage processing apparatus 7. The power stoppage processing apparatus 7 has abody controlling device 48 and a plurality ofunit control sections 9 for controlling eachspindle apparatus 2 to execute power stoppage processing if the drop in the voltage of an alternatingcurrent power supply 36 has lasted a predetermined period of time. Thebody controlling device 48 has aconverter 41 that converts the voltage of the alternatingcurrent power supply 36, a host CPU 35 (a central processing apparatus) constituting a stop instruction means, apower stoppage detector 34 constituting a power stoppage detection means, and aninverter 42 constituting a means for stopping the winding drum drive motor. Thebody controlling device 48 outputs a stop instruction concurrently to eachunit control section 9 and theinverter 42 for the winding drum drive motor constituting the stopping means. - The
power stoppage detector 34 is connected to thehost CPU 35 so that it can transmit a power stoppage signal to theCPU 35 upon detecting that the decrease in the voltage of the alternatingcurrent power supply 36 has lasted a predetermined period of time. Upon receiving the power stoppage signal, thehost CPU 35 transmits a stop instruction directly and concurrently to eachunit control section 9 and the winding drumdrive motor inverter 42 via thecontrol signal line 53. In addition, theconverter 41 has an AC/DC conversion section 41a and a DC/DC conversion section 41b, and the winding drumdrive motor inverter 42 is connected to the AC/DC conversion section 41a via a direct-current bus 47. Thehost CPU 35 is connected to the DC/DC conversion section 41b, and thesection 41b transforms the direct-current voltage to 24 volts for use in control operations executed by thehost CPU 35. - Each
unit control section 9 has 32inverters 45 for the spindle drive motor, asingle relay device 44, and a single auxiliarypower supply apparatus 43, and is connected to thebody controlling apparatus 48 via acommunication line 46. The 32inverters 45 are connected to therelay device 44 via acommunication line 51. Therelay device 44 receives via thecommunication line 46 parameters output from thehost CPU 35 and transmits them to each of the 32inverters 45 via thecommunication line 51. Conversely, therelay device 44 receives the rotation speed of thespindle drive motor 6 output from eachinverter 45 or an instruction value for themotor 6, and transmits the instruction value to thehost CPU 35 via thecommunication line 46. - The 32
inverters 45 constituting eachunit control section 9 are connected in series via a controlpower supply line 49, acontrol signal line 50, and acommunication line 51. Arelay connector board 52 is interposed between the group of 32 inverters and the auxiliarypower supply apparatus 43, and the controlpower supply line 49 is connected from the auxiliarypower supply apparatus 43 to the group of inverters and therelay device 44 via therelay connector board 52. In addition, thecontrol signal line 50, disposed as the direct-current bus 47, along the machine body from thehost CPU 35 is connected to the group of inverters and therelay device 44 via therelay connector board 52. In addition, the twospindle drive motors 2 are connected to eachinverter 45. Eachinverter 45 has a regenerative circuit. The circuit outputs regenerative power generated by rapidly decelerating thespindle drive motor 6 during power stoppage to the direct-current bus 47, which serves as a drive power supply line a predetermined stop time is set for each inverter beforehand. - The regenerative power is generated because, upon power stoppage, the
spindle drive motor 6 provides a large moment of inertia and acts as a generator. - Auxiliary
power supply apparatuses 43 are provided for eachunit control section 9 and are connected via the direct-current bus 47. In addition, the auxiliarypower supply apparatus 43 has a direct-current transformer 43a, and during normal operation and power stoppage, theapparatus 43 converts a direct-current voltage supplied via the direct-current bus 47 into the 24 volts control voltage required to control thespindle drive motor 6 so as to supply this voltage to the group of inverters. Theapparatus 43 supplies the 24 volts control voltage to each of the 32inverters 45 via the controlpower supply line 49. In addition, the auxiliarypower supply apparatus 43 has acapacitor 43b constituting a storage means to store regenerative power so as to maintain the control voltage over a longer period of time. - After receiving the stop instruction via the
control signal line 50, eachinverter 45 uses the control voltage from the auxiliarypower supply apparatus 43 to control each spindle drivemotor 6 independently via feedback, thereby allowing themotor 6 to decelerate and stop within a preset stop time. In addition, after receiving the stop instruction via thecontrol signal line 53, theinverter 42 for the winding drum drive motor uses a direct-current voltage on the direct-current bus 47 obtained from regenerative power from themotor 6 to control the winding drum drive motor 4 independently via feedback, thereby allowing the motor 4 to decelerate and stop within a preset stop time. That is, theinverters motors 4 and 6, respectively. Theinverter 42 for the winding drum drive motor has a direct-current transformer (not shown in the drawings) for generating the control voltage inside theinverter 42. - As described above, in the power stoppage processing apparatus 7 according to this embodiment, the
body controlling apparatus 48 individually controls thespindle drive motor 6 and the winding drum drive motor 4 instead of obtaining the rotation speeds of themotors 6 and 4 so as to control them synchronously. Thus, the power stoppage processing apparatus 7 does not need to receive the rotation speeds of thespindle drive motor 6 and the winding drum drive motor 4, thereby simplifying the wiring configuration and eliminating the need for advanced control. - The operation of the individual-spindle-drive type multi-twister, having the above configuration is described with reference to the drawings.
- As shown in Figure 1, when power is supplied from the alternating
current power supply 36 to theinverter 45 for the spindle drive motor via theconverter 41 and the direct-current bus 47, thespindle drive motor 6 is driven to rotate eachrotating disc 33 at the same rotation speed as that of each spindle drivemotor 6. When eachrotating disc 33 rotates, the yarn Y unwound from thesupply package 8 enters thetension apparatus 32, which twists the yarn Y once while tensing it. The yarn Y is twisted again and ballooned to theballoon guide 37. - On the other hand, when power is supplied to the
inverter 42 via the direct-current bus 47, the winding drum drive motor 4 is driven and its output is transmitted to thesupport shafts rod 18 via thepulleys belts speed reducing apparatus 11, thevariable speed changer 17, and thecam box 27. The windingdrum 21 and thefeed roller 26 for each spindle unit then rotate and thetraverse guide 29 for each spindle unit reciprocates. - When this rotation and reciprocating motion occurs, the
traverse guide 29 traverses the yarn Y, which has been twisted twice by thespindle apparatus 2. The yarn Y is then wound around the winding package P. During traversing, thevariable speed changer 17 corrects the winding angle. - While the yarn Y is being wound around the winding package P in this manner and when the
power stoppage detector 34 detects a decrease in power supply voltage (S1, YES), thehost CPU 35 determines whether the decrease has lasted a predetermined period of time (for example, 1 msec.) (S2). If not (S2, N0), the power stoppage time is too short to affect the operation of themulti-twister 1, so theapparatuses - On the other hand, if at S2, the decrease has lasted the predetermined period of time (for example, over 1 msec.) (S2, YES), the
host CPU 35 sends a stop instruction concurrently via thecontrol signal line 53 to theinverter 42 for the winding drum drive motor and therelay connector board 52 provided for eachunit control section 9. The stop instruction is then transmitted concurrently to eachinverter 45 from eachrelay connector board 52 via the control signal line 50 (S4). After theinverters current power supply 36 to thespindle drive motor 6 and the winding drum drive motors 4 is terminated. - Since the
spindle drive motor 6 provides a large inertia even after the power supply has stopped, it can be operated as a generator to generate regenerative power by rapidly decelerating and stopping it within the predetermined stop time. This regenerative power is output from a regenerative circuit for eachinverter 45 to the direct-current bus 47, which serves as a drive power supply line, with part of the power supplied to eachinverter 45 via the auxiliarypower supply apparatus 43 and the controlpower supply line 49 used as a control voltage for thespindle drive motor 6. In addition, the other regenerative power is supplied from the direct-current bus 47 to the direct-current transformer (not shown in the drawings) inside theinverter 42 for the winding drum drive motor as a control voltage. - Thus, based on a rotation speed detected by a built-in hall sensor incorporated in a stator located around a rotor to detect the rotational position of the rotor, each
inverter 45 independently transmits and receives feedback control to and from thespindle drive motor 6 to decelerate and stop themotor 6 within the predetermined stop time. In addition, theinverter 42 for the winding drum drive motor obtains the rotation speed of the winding drum drive motor 4 from apulse generator 30 provided separately from the motor 4 to independently transmit and receive feedback control to and from the motor 4 in order to decelerate and stop the motor 4 within the predetermine stop time (S5). The each spindle drivemotor 6 and the winding drum drive motor 4 then synchronously decelerate and simultaneously stop after the predetermined stop time (S6). - The control
power supply line 49 in themulti-twister 1 according to this embodiment supplies eachinverter 45 with a control voltage (24 volts) to control thespindle drive motor 6. In addition, thecontrol signal lines inverters communication lines host CPU 35 to monitor the rotation speed of eachmotor 6 or an instruction value therefor or to set controlling parameters for each of theinverters - In the
multi-twister 1 according to this embodiment, the windingdrum 21 and thetraverse mechanisms cam box 27 and are driven by a common winding drum drive motor 4. - Next, a second embodiment of the present invention will be described with reference to Figures 5 to 8.
- An individual-spindle-
drive type multi-twister 101 is composed of 80 to 308 yarn winding units U for the corresponding spindle units installed in a line, as shown in Figure 5. A single yarn winding unit U for the corresponding spindle unit has aspindle apparatus 102 and a windingapparatus 103 connected to thespindle apparatus 102 so that yarn on asingle supply package 108 is wound around a winding package P. - The
spindle apparatus 102 has thesupply package 108, astationary plate 131, atension apparatus 132, arotating disc 133, and a spindle drive motor (a drive motor) 106 that twists the yarn Y. Thespindle drive motor 106 comprises a direct-current brushless motor BLM and has therotating disc 133 on its output shaft. Thestationary plate 131 is provided on therotating disc 133 so that thesingle supply package 108 can be placed on thestationary plate 131. Furthermore, thetension apparatus 132 is provided on thesupply package 108 to apply a predetermined tension to the yarn Y unwound from thesupply package 108. - Thus, the
spindle apparatus 102 places the yarn Y that is unwound from thesupply package 108 in thetension apparatus 132 to tense it while using thedrive motor 106 to rotate therotating disc 133 at a high speed to balloon the yarn Y to aballoon guide 137. In addition, the yarn Y is twisted once between thetension apparatus 132 and therotating disc 133, and is twisted again between therotating disc 133 and theballoon guide 137. - As shown in Figure 6. the winding
apparatus 103 has a windingdrum 121, a winding package P, atraverse guide 129, afeed roller 126 and acradle 140 to wind the yarn Y twisted by thespindle apparatus 102 around the winding package P. The winding package P is supported by thecradle 140 in a way that it is free to rotate, and the windingdrum 121 pressure-contacts the winding package P. Thus, after passing the yarn twisted twice as described above, from theballoon guide 137 throughguide rollers feed roller 126, the windingapparatus 103 winds the yarn around the winding package P while traversing it using thetraverse guide 129. - As shown in Figure 5, the individual-spindle-
drive type multi-twister 1 has not only the yarn winding unit U but also adrive system 105 for driving the windingapparatuses 103 concurrently and acontrol system 107 for controlling eachspindle apparatus 102 and each windingapparatus 103. Thedrive system 105 has a windingdrum drive motor 104, afirst pulley 110, abelt 111, asecond pulley 112, aspeed reducing apparatus 117, athird pulley 116, afourth pulley 119, abelt 120, afifth pulley 122, asixth pulley 124, aseventh pulley 113, abelt 114, aneighth pulley 115, and acam box 127. Thesystem 105 uses the driving force of the windingdrum drive motor 104 to rotate the windingdrum 121 andfeed roller 126 of each yarn winding unit U while thetraverse guide 129 moves reciprocally. - The winding
drum drive motor 104 is an induction motor 1M. Themotor 104 has thefirst pulley 110 on its output shaft, and thesecond pulley 112 is connected to themotor 104 via thebelt 111. Thespeed reducing apparatus 117 has a plurality of gears (not shown in the drawings) and decelerates at a specified rate while changing its rotational direction when the driving force of the windingdrum drive motor 104 is transmitted via thesecond pulley 112. In addition, thespeed reducing apparatus 117 has two output shafts so as to receive force through one shaft while outputting force through two shafts. Thethird pulley 116 is fitted on one of the output shafts, and theseventh pulley 113 is fitted on the other output shaft. - The
fourth pulley 119 fitted on thesupport shaft 118 is connected to thethird pulley 116 via thebelt 120, and the plurality of windingdrums 121 are provided on thesupport shaft 118 at a predetermined interval. In addition, thefifth pulley 122 is fitted on thesupport shaft 118 in a line to thefourth pulley 119. Thesixth pulley 124 fitted on the support shaft 123 is connected to thefifth pulley 122, and the plurality offeed rollers 126 are provided on the support shaft 123 at a predetermined interval. Thus, thedrive system 105 transmits a driving force reduced by thespeed reducing apparatus 117 to each windingdrum 121 via thethird pulley 116, thebelt 120, and thefourth pulley 119, and also transmits a driving force to thefeed roller 126 via thefifth pulley 122, thebelt 125, and thesixth pulley 124. - The
speed reducing apparatus 117 is connected to thecam box 127 via theseventh pulley 113, thebelt 114, and theeighth pulley 115. Thereciprocating rod 128 is connected to thecam box 127 so as to convert rotational force into reciprocating motion. The traverse guides 129 are fitted on the reciprocatingrod 28 at a predetermined interval. Thus, thedrive system 105 causes thetraverse guide 129 to reciprocate so as to traverse the yarn Y twisted by thespindle apparatus 102 while the yarn Y is wound around the winding package P, which is rotated while pressure-contacting the windingdrum 121. - As shown in Figure 5, the
control system 107 has abody controlling apparatus 142 and a plurality ofunit control sections 109 for controlling each spindle apparatuses 102, and constitutes a control system for the individual-spindle-drive type multi-twister 101. Thebody controlling apparatus 142 has aconverter 135 that converts the voltage of an alternatingcurrent power supply 134, ahost CPU 136 constituting a central processing unit, and a rotationspeed control apparatus 141 for the winding drum drive motor. Thebody controlling apparatus 142 outputs various control instructions concurrently to eachunit control section 109 and the rotationspeed control apparatus 141 for the winding drum drive motor. - The
host CPU 136 transmits various parameters and control instructions concurrently to eachunit control section 109 and the rotationspeed control apparatus 141 for the winding drum drive motor via acommunication line 146. Thehost CPU 136 also transmits activation and stop instructions concurrently to eachunit control section 109 and the rotationspeed control apparatus 141 for the winding drum drive motor via acontrol signal line 153. In addition, theconverter 135 has an AC/DC conversion section 135a and a DC/DC conversion section 135b, and the rotationspeed control apparatus 141 for the winding drum drive motor is connected to the AC/DC conversion section 135a via a direct-current bus line 147. Thehost CPU 136 is connected to the DC/DC conversion section 135b, and the DC/DC conversion section 135b converts 290 volts into 24 volts for use in control operations executed by thehost CPU 136. - The rotation
speed control apparatus 141 for the winding drum drive motor receives a supply of a first direct-current voltage of 290 volts via the direct-current bus line 147 and uses parameters and control instructions received via thecommunication line 146 to independently send feedback to the windingdrum drive motor 104 based on the rotation speed measured by a pulse generator PG148. - Each
unit control section 109 has 32 rotationspeed control apparatuses 144 for the spindle drive motor, asingle relay device 145, and a spindle direct-current transformer 143 constituting a single direct-current voltage transforming means, and is connected to thebody controlling apparatus 142 via thecommunication line 146. The 32 rotationspeed control apparatuses 144 are connected to therelay device 145 via thecommunication line 146. Therelay device 145 relays a control instruction output from thehost CPU 136 to transmit it to each of the 32 rotationspeed control apparatuses 144. - The said spindle direct-
current transformer 143 is connected to the direct-current bus line 147 and during normal operation, converts the first direct-current voltage of 290 volts supplied via the direct-current bus line 147 into a second direct-current voltage of 24 volts for use in controlling thespindle drive motor 106. - The each rotation
speed control apparatuses 144 for the spindle drive motor are connected in series to the spindle direct-current transformer 143 via a controlpower supply line 149. Arelay connector board 152 is interposed between the group of 32 rotation speed control apparatuses and the spindle direct-current transformer 143, and the controlpower supply line 149 is connected from the spindle direct-current transformer 143 to the group of rotation speed control apparatuses and therelay device 145 via therelay connector board 152. In addition, acontrol signal line 153 disposed along the body from thehost CPU 136 is connected to the group of rotation speed control apparatuses and therelay device 145 via therelay connector board 152. In addition, the two spindle drivemotors 102 are connected to each rotationspeed control apparatus 144, and each rotationspeed control apparatus 144 can receive a control instruction via thecommunication line 146, therelay device 145, and thecommunication line 151 to independently send feedback to control eachspindle drive motor 106 based on the rotation speed as determined by therotation speed detector 150. That is, a single rotationspeed control apparatus 144 drives and stops two spindle drivemotors 106. The rotationspeed control apparatuses motors - The operation of the individual-spindle-
drive type multi-twister 101 having the above configuration is described with reference to the drawings. - As shown in Figures 5 and 7, the alternating
current power supply 134 supplies the second direct-current voltage of 24 volts to each rotationspeed control apparatus 144 via theconverter 135, the direct-current bus line 147, and the spindle direct-current transformer 143. In addition, thehost CPU 136 transmits an activation instruction to therelay connector board 153 via thecontrol signal line 153, and the instruction is then sent from theboard 152 to the rotationspeed control apparatus 144 via thecontrol signal line 154. Eachspindle drive motor 106 is concurrently driven based on the instruction from the rotationspeed control apparatus 144 to rotate eachrotating disc 133 at the same rotation speed as in eachmotor 106. When eachrotating disc 133 rotates, the yarn Y unwound from thesupply package 108 enters thetension apparatus 132, which twists the yarn Y once while tensing it. The yarn Y is twisted again and ballooned to theballoon guide 137. - On the other hand, the alternating
current power supply 134 supplies the first direct-current voltage of 290 volts to the rotationspeed control apparatus 141 via theconverter 135 and the direct-current bus line 147, and theCPU 136 transmits the activation instruction to theapparatus 141 via thecontrol signal line 153. The windingdrum drive motor 104 is driven based on the instruction from the rotationspeed control apparatus 141. The output of themotor 104 is transmitted to thesupport shafts 118 and 123 and thereciprocating rod 128 via thepulleys belts speed reducing apparatus 117, and thecam box 127 to rotate the windingdrum 121 andfeed roller 126 of each spindle unit while thetraverse guide 129 of each spindle unit moves reciprocally. - When this rotation and reciprocal motion occurs, the yarn Y, which has been twisted twice by the
spindle apparatus 102, is wound around the winding package P while traversing it using thetraverse guide 129. During traversing, thespeed reducing apparatus 117 corrects the winding angle. - During the above winding operation, the first direct-current voltage is supplied to each spindle direct-
current transformer 143 via the direct-current bus 147 and each rotationspeed control apparatus 144 can reliably receive the supply of the converted second direct-current voltage, thereby preventing a voltage drop. In addition, since the various parameters are transmitted to the plurality of rotationspeed control apparatuses 144 via therelay device 145, the central control apparatus can set the parameters concurrently. - Next, the configuration of another control system cited as an example of the present invention will be described with reference to Figure 8.
- This control system differs from the above control system and has a plurality of winding
drum drive motors 104. Thus, the AC/DC converter 135a is provided for each windingdrum drive motor 104 and is directly connected to the alternatingcurrent power supply 134. The direct-current bus line 147 is connected to the each AC/DC converter 135a and the plurality ofunit control sections 109 are connected to thebody controlling apparatus 142. - Each rotation
speed control apparatus 141 for the winding drum drive motor is connected to thehost CPU 136 via thecommunication line 146 and thecontrol signal line 153 to receive various parameters and activation and stop instructions. Even with a plurality of windingdrum drive motors 104, this configuration has the advantage of enabling components corresponding to added winding spindle units to be added using the plurality of AC/DC converters 135a, the plurality of spindle direct-current transformers 143, and therelay device 145 and also using the direct-current bus line 147, thecommunication line 146, and thecontrol signal line 153 for relaying. This configuration thus reduces the number of wiring steps required. - The control
power supply line 149 in the individual-spindle-drive type multi-twister 201 according to this embodiment supplies each rotationspeed control apparatus 144 with the control voltage (24 volts) for controlling thespindle drive motor 106. In addition, thecontrol signal lines speed control apparatuses communication lines host CPU 136 to monitor the rotation speed of eachmotor 106 or an instruction value therefor or to set controlling parameters for each of the rotationspeed control apparatuses - Although this embodiment has been described in conjunction with the 32 rotation
speed control apparatuses 144 for the spindle drive motor constituting eachunit control section 109, the number ofcontrolling apparatuses 144 is not limited to 32. - In addition, although this embodiment has been described in conjunction with the two spindle drive
motors 106 connected to the rotationspeed control apparatus 144 for the spindle drive motor, the number ofmotors 106 is not limited to two. - Moreover, although this embodiment has been described in conjunction with the
single supply package 108 provided for each yarn winding unit U, it is not limited to asingle supply package 108 and a plurality ofsupply packages 108 may be provided. Therotation speed detector 150 is built into the above direct-current brushless motor to detect the rotation speed of this motor. - Next, a third embodiment of the present invention will be described with reference to Figures 9 to 12.
- An individual-spindle-
drive type multi-twister 201 is composed of 80 to 308 yarn winding units U for the corresponding spindle units installed in a line, as shown in Figure 9. A yarn winding unit U for the corresponding spindle unit has aspindle apparatus 202 and a windingapparatus 203 connected to and installed on thespindle apparatus 202 so that yarn on asingle supply package 208 is wound around a winding package P. - The
above spindle apparatus 202 has thesupply package 208, astationary plate 231, atension apparatus 232, arotating disc 233, and aspindle drive motor 206 that twists yarn Y. Thespindle drive motor 206 comprises a direct-current brushless motor BLM and has therotating disc 233 on its output shaft. Thestationary plate 231 is provided on therotating disc 233 so that thesingle supply package 208 can be placed on thestationary plate 231. Furthermore, atension apparatus 232 is provided on thesupply package 208 to apply a predetermined tension to the yarn Y unwound from thesupply package 208. - Thus, the
spindle apparatus 202 places the yarn Y that is unwound from thesupply package 208 in thetension apparatus 232 to tense it while using thespindle drive motor 206 to rotate therotating disc 233 at a high speed so as to balloon the yarn Y to aballoon guide 237. In addition, the yarn Y is twisted once between thetension apparatus 232 and therotating disc 233 and is twisted again between therotating disc 233 and theballoon guide 237. - As shown in Figure 10. the above winding
apparatus 203 has a windingdrum 221, the winding package P, atraverse guide 229, afeed roller 226, acradle 240, and a windingpackage brake 230 to wind around the winding package P the yarn Y twisted by thespindle apparatus 202. The winding package P is rotatably supported by thecradle 240, and the windingdrum 221 pressure-contacts the winding package P. Thus, after passing the yarn twisted twice as described above, from theballoon guide 237 through theguide rollers feed roller 226, the windingapparatus 203 winds the yarn Y around the winding package P while traversing it using thetraverse guide 229. - The winding
package brake 230 has alink arm 252 located between the winding package P and the windingdrum 221, acylinder 253 that rotates thelink arm 252, and an electromagnetic valve SV248 that supplies and ejects air to and from thecylinder 253. The electromagnetic valve SV248 supplies air to thecylinder 253 to rotate thelink arm 252 in order to allow the winding package P to contact or.leave the windingdrum 221. Thus, by allowing the winding package P and the windingdrum 221 to separate, this configuration prevents the yarn Y from being wound to the winding package P despite the rotation of the windingdrum 221. - As shown in Figure 9, this multi-twister has not only the above yarn winding unit U but also a
drive system 205 for each driving the windingapparatus 203 concurrently and a control system 207 for controlling eachspindle apparatus 202 and each windingapparatus 203. Thedrive system 205 has a windingdrum drive motor 204, afirst pulley 210, abelt 211, asecond pulley 212, aspeed reducing apparatus 217, athird pulley 216, afourth pulley 219, abelt 220, afifth pulley 222, asixth pulley 224, aseventh pulley 213, abelt 214, aneighth pulley 215, and acam box 227. Thesystem 205 uses the driving force of the windingdrum drive motor 204 to rotate the windingdrum 221 andfeed roller 226 of each yarn winding unit U while thetraverse guide 229 moves reciprocally. - The above winding
drum drive motor 204 is an induction motor IM. The motor 4 has thefirst pulley 210 on its output shaft, and thesecond pulley 212 is provided for the motor 4 via thebelt 211. The abovespeed reducing apparatus 217 has a plurality of gears (not shown in the drawings) and decelerates at a specified rate while changing its rotational direction, when the driving force of the windingdrum drive motor 204 is transmitted via thesecond pulley 212. In addition, thespeed reducing apparatus 217 has two output shafts so as to receive force through one shaft while outputting force through two shafts. Thethird pulley 216 is fitted on one of the output shafts, and theseventh pulley 213 is fitted on the other output shaft. - The
fourth pulley 219 fitted on thesupport shaft 218 is connected to thethird pulley 216 via thebelt 220, and the plurality of windingdrums 221 are provided on thesupport shaft 218 at a predetermined interval. In addition, thefifth pulley 222 is fitted on thesupport shaft 218 in a line to thefourth pulley 119. Thesixth pulley 224 fitted on the support shaft 223 is connected to thefifth pulley 222, and the plurality offeed rollers 226 are provided on the support shaft 223 at a predetermined interval. Thus, thedrive system 205 transmits a driving force reduced by thespeed reducing apparatus 211 to each windingdrum 221 via thethird pulley 216, thebelt 220, and thefourth pulley 219, and also transmits a driving force to thefeed roller 226 via thefifth pulley 222, thebelt 225, and thesixth pulley 224. - The
speed reducing apparatus 217 is connected to thecam box 227 via theseventh pulley 213, thebelt 214, and theeighth pulley 215. Thereciprocating rod 228 is connected to thecam box 227 so as to convert a rotational force into reciprocating motion. The traverse guides 229 are fitted on thereciprocating rod 228 at a predetermined interval. Thus, using a motion reciprocal to that of thetraverse guide 229, thedrive system 205 traverses the yarn Y, which is twisted by thespindle apparatus 202 while winding the yarn Y around the winding package P, which is rotated while pressure-contacting the windingdrum 221. - As shown in Figure 11, the control system 207 has a
body controlling apparatus 242 and a plurality ofunit control sections 209 for controlling eachspindle apparatus 202, and constitutes a control system for the individual-spindledrive type multi-twister 201. Thebody controlling apparatus 242 has aconverter 235 that converts the voltage of an alternatingcurrent power supply 234, ahost CPU 236 constituting a central processing unit, and an inverter (a rotation speed control apparatus) 241 for the winding drum drive motor. Thebody controlling apparatus 242 outputs various control instructions concurrently to eachunit control section 209 and theinverter 241 for the winding drum drive motor. - The
host CPU 236 transmits various parameters and control instructions concurrently to eachunit control section 209 and theinverter 241 for the winding drum drive motor via acommunication line 246. Thehost CPU 136 also transmits activation and stop instructions concurrently to eachcontrol section 209 and theinverter 241 for the winding drum drive motor via acontrol signal line 257. In addition, theconverter 235 has an AC/DC conversion section 235a and a DC/DC conversion section 235b, and theinverter 241 for the winding drum drive motor is connected to the AC/DC conversion section 235a via a directcurrent bus line 247. Thehost CPU 236 is connected to the DC/DC conversion section 235b, and the section 235b converts 290 volts into 24 volts for use in control operations executed by thehost CPU 236. - The
inverter 241 for the winding drum drive motor receives a supply of a first direct-current voltage of 290 volts via the direct-current bus line 247 and uses parameters and control instructions received via thecommunication line 246 to independently send feedback to control the windingdrum drive motor 204 based on the rotation speed measured by a pulse generator PG254. - Each
unit control section 209 has 32 inverters (rotation speed control apparatuses) 244 for the spindle drive motor, asingle relay device 245, and a spindle apparatus direct-current transformer 243, and is connected to thebody controlling apparatus 242 via thecommunication line 246. The 32inverters 244 are connected to therelay device 245 via thecommunication line 251. Therelay device 245 relays a control instruction output from thehost CPU 236 to transmit it to each of the 32inverters 244. - Each spindle apparatus direct-
current transformer 243 is connected to the direct-current bus line 247, and during normal operation, converts the first direct-current voltage of 290 volts supplied via the direct-current bus line 247 into a second direct-current voltage of 24 volts for use for the control ling of thespindle drive motor 206. - The 32
inverters 244 for the spindle drive motor are connected in series to the direct-current transformer 243 via a controlpower supply line 249. Arelay connector board 256 is interposed between the group of 32 inverters and the spindle apparatus direct-current transformer 243, and the controlpower supply line 249 is connected from the spindle apparatus direct-current transformer 243 to the group of inverters and therelay device 245 via therelay connector board 256. In addition, acontrol signal line 257 disposed along the body from thehost CPU 236 is connected to the group of inverters and therelay device 245 via therelay connector board 256. In addition, the two spindle drivemotors 202 are connected to eachinverter 244, and eachinverter 244 can receive a control instruction via thecommunication line 246, therelay device 245, and thecommunication line 251 to independently send feedback to control eachspindle drive motor 206 based on a rotation speed measured by therotation speed detector 255. That is, thesingle inverter 244 drives and stops the two spindle drivemotors 206. Theinverter motors - Next, the integral part of the individual-spindle
drive type multi-twister 201 according to this embodiment is described. - As shown in Figures 9 and 11, the
inverter 244 for spindle drive motor has anactivation controlling section 244a and aclearing control section 244b to control the activation of thespindle drive motor 206 and the opening and closing of the electromagnetic valve SV248. To start up eachspindle drive motor 206 concurrently, theactivation controlling section 244a controls eachspindle drive motor 206 so as to be activated slowly in about 15 to 20 seconds. To start up anyspindle drive motor 206 during the winding of other spindle units (spindle), thesection 244a controls themotor 206 so as to be activated rapidly in about 10 seconds. - In addition, to start up any
spindle drive motor 206 during the winding of other spindle units (spindle), theclearing control section 244b controls the electromagnetic valve SV248 so that after the activation of thisspindle drive motor 206, the windingpackage brake 230 is cleared after a predetermined period of time (2 seconds). - In addition, an
activation switch 250 constituting an operation means is connected to eachinverter 244 for spindle drive motor so that to start up anyspindle drive motor 206 during the winding of other spindle units (spindle), thisswitch 250 can be turned on to activate thespindle drive motor 206. - The operation of the individual-spindle-
drive type multi-twister 201 of the above configuration is described with reference to the drawings. - As shown in Figures 9 and 11, the alternating
current power supply 234 supplies 24 volts to eachinverter 244 via theconverter 235, the direct-current bus 247, and the spindle apparatus direct-current transformer 243. In addition, thehost CPU 236 transmits an activation instruction to eachrelay connector board 256 via thecontrol signal line 257, and the instructions for the spindle drive motor is then sent from therelay connector board 256 to theinverter 244 via thecontrol signal line 258. Eachspindle drive motor 206 is concurrently driven based on instructions from theactivation controlling section 244a in the rotationspeed control apparatus 244 to rotate eachrotating disc 233 at the same rotation speed as that of eachmotor 206. And eachspindle drive motor 206 reaches to the predetermined speed of rotation about 15 seconds after rotation begins while eachrotating disc 233 rotates, the yarn Y unwound from thesupply package 208 enters thetension apparatus 232, which twists the yarn Y once while tensing it. The yarn Y is twisted again and ballooned to theballoon guide 237. - On the other hand, the alternating
current power supply 234 supplies 290 volts to theinverter 241 for the winding drum drive motor via theconverter 235 and the direct-current bus line 247, and theCPU 236 transmits the activation instruction to theinverter 241 via thecontrol signal line 257. The windingdrum drive motor 204 is driven based on the instruction from theinverter 241. The output of themotor 204 is transmitted to thesupport shafts 218 and 223 and thereciprocating rod 228 via thepulleys belts speed reducing apparatus 217, and thecam box 227 to rotate the windingdrum 221 andfeed roller 226 of each spindle unit while thetraverse guide 229 of each spindle unit moves reciprocally. - When this rotation and reciprocal motion occurs, the yarn Y, which has been twisted twice by the
spindle apparatus 202, is wound around the winding package P while traversing it using thetraverse guide 229. During the traversing, thespeed reducing apparatus 217 corrects the winding angle. - As described above, when the yarn Y is cut while being wound around the package P, a yarn cut sensor (not shown in the drawings) sends a motor stop signal to the
inverter 244. Upon receiving this signal, theinverter 244 stops thespindle drive motor 206 while transmitting an opening or closing signal to the electromagnetic valve SV248. The valve SV248 is opened to feed air to thecylinder 253 to rotate thelink arm 252. Then, thelink arm 252 enters the area between the winding package P and the windingdrum 221 to brake the package P. At this point, the windingdrum 221, which is common to all spindle units, continues rotating at the normal winding speed. - Then, a piecing apparatus (not shown in the drawings) pieces the yarn, and when the yarn is ready for winding, the operator turns on the
activation switch 250 to cause thespindle drive motor 206, which has been stopped, to rotate again, (see Figure 11). Turning theswitch 250 on causes theactivation control section 244a to activate themotor 206 rapidly in about 10 seconds. Thus, the winding package P stops to allow the yarn Y to be twisted during the time it doesn't travel, thereby preventing incompletely twisted twist yarn Y from being wound around package P. - The
clearing control section 244b transmits the opening or closing signal to the electromagnetic valve SV248 about two minutes after the activation of thespindle drive motor 206. The electromagnetic valve SV248 is closed to reduce the pressure on thecylinder 253 to rotate thelink arm 252. Thus, thearm 252 leaves the winding package P and windingdrum 221 about two seconds after the activation of thespindle drive motor 206, thereby clearing the braked condition of the package P. - Clearing the braked condition causes the winding package P to contact the winding
drum 221, which is rotating at the normal winding speed, so the package P starts to rotate. About eight seconds after the start of the rotation of the winding package P, the package P reaches its rotation speed for normal operation. On the other hand, thespindle drive motor 206 reaches the rotation speed for normal operation about 10 seconds after rotation begins. In this manner, about 10 seconds after theactivation switch 250 is turned on, themotor 206 and the package P return to their normal rotation speeds. - The control
power supply line 249 in the multi-twister 201 according to this embodiment supplies eachinverter 244 with the control voltage (24 volts) for controlling thespindle drive motor 206. In addition, thecontrol signal lines inverters communication lines host CPU 236 to monitor the rotation speed of eachmotor 206 or an instruction value therefor or to set controlling parameters for each of theinverters - To activate each
spindle drive motor 206 concurrently, the individual-spindle-drive type multi-twister 201 according to the present invention simultaneously starts activating the windingdrum 221 common to all spindle units andmotors 206 and gradually accelerates them at the same rate. This prevents the slippage between thedrum 221 and the winding package P, and thus the yarn Y is cut upon activation. With respect to the operation during the concurrent activation, when the power is turned on, thepackage brake 230 is cleared to allow the package P to contact the windingdrum 221. Subsequently, both the windingdrum 221 and thespindle apparatus 202 begin to rotate. - Although this embodiment has been described in conjunction with the
clearing control section 244b that clears the windingpackage brake 230 for predetermined period of time (two seconds) after activation, it is not limited in this respect. Based on the rotation speed detected by the rotation speed detector 255 (see Figure 11), theclearing control section 244b may control the windingpackage brake 230 so as to be cleared when thespindle drive motor 206 reaches a predetermined rotation speed. - In addition, according to this embodiment, about 15 to 20 seconds are required to activate the
spindle drive motors 206 concurrently, but the activation time is not limited to these values. In addition, according to this embodiment, about 10 seconds are required to activate anyspindle drive motor 206, but this activation time is not limited to these values. - Although this embodiment has been described in conjunction with 32
inverters 244 for the spindle drive motor for consisting eachunit control section 209, the number ofinverters 244 is not limited to 32. - In addition, although this embodiment has been described in conjunction with the two spindle drive
motors 206 connected to theinverter 244, the number ofmotors 206 is not limited to two. - Moreover, although this embodiment has been described in conjunction with the
single supply package 208 provided for each yarn winding unit U, this embodiment is not limited in this respect, and a plurality ofsupply packages 208 may be provided. Arotation speed detector 255 is built into the direct-current brushless motor to detect the rotation speed of this motor. - According to the third embodiment, in the individual-spindle-drive type multi-twister comprising the rotation
speed control apparatus 44 that drives each of thespindle drive motors 206 provided for therespective spindles 103, the controllingapparatus 44 is controlled so that the time from the start of activation until a predetermined speed is reached differs between the individual start-up of themotors 206 and the concurrent start-up of the large number ofmotors 6. That is, the rotationspeed control apparatus 44 comprises an activation control means that activates the motors rapidly for individual start-up, while normally activating them (more gradually than in the individual start-up) for concurrent start-up. Thus, the rapid start-up serves to prevent incompletely twisted yarn, whereas the gradual start-up serves to restrain the .increase of the current values in the control system despite the concurrency of the start-up. - Individual start-up can be executed using the operation means (the activation switch) 50 for each spindle unit, while concurrent start-up can be executed by operating the
body controlling apparatus 42. In addition, the third embodiment has a plurality of windingpackage brakes 30 to stop the yarn from being wound around the winding package, and a clearing control means to clear the braked condition effected by the windingpackage brake 30, with a predetermined timing for the rotation of themotor 206. Accordingly, the motor can be automatically started up without the use of a foot brake for stopping the winding package as in the prior art, thereby preventing incompletely twisted yarn. - Although in the first to third embodiments, the double twister wherein the single rotation of the spindle apparatus allows the yarn Y to be twisted twice has been described as an example of the individual-spindle-drive type multi-twister, a triple or quadruple twister may be used.
- In addition, the individual-spindle-drive type multi-twister according to the present invention may be a drawing texturing machine or an air spinning machine instead of the multi-twister. In this case, the spindle drive motor drives a driving member (a nip twister belt) for false twisting means in the drawing twister or a driving member (a balloon roller) for a spinning means in the air spinning machine.
- The present invention is an individual-spindle-drive type textile machine wherein rotation speed control apparatuses drive a plurality of spindle drive motors provided for the respective spindle units and a winding drum drive motor used in common by the plurality of spindle units, respectively. The machine comprises a power stoppage detection means for detecting power stoppage when the voltage decreases by a specified value or larger, as well as a stop instruction means for outputting a stop instruction to each rotation speed control apparatus upon the detection of a power stoppage. The machine also has a stopping means for providing feedback control in such a way as to stop each of said motors at the respective preset stop time based on said stop instruction.
- Thus, after power stoppage has been detected due to a decrease in power supply voltage lasting a predetermined period of time, feedback control is provided while the rotation speed of each motor is detected independently for each rotation speed control apparatus, until the motor stops. This configuration eliminates the need to transmit rotation speed signals between rotation speed control apparatuses and the need for an external rotation speed instruction means for each rotation speed control apparatus, and can decelerate and stop each motor while synchronizing them together using simple control operations.
- The present invention is configured so that the rotation speed control apparatus for the plurality of spindle drive motors is connected to a common direct-current bus disposed along the direction in which multi-twisters are installed in a line, and so that the rotation speed control apparatus for the winding drum drive motor is connected to said direct-current bus.
- Thus, by appropriately setting the time at which each motor stops in response to the detection of a power stoppage, regenerative power generated by the spindle drive motor having a larger inertia increases the direct-current through the direct-current bus while the motor is decelerating. This power can be used to allow the rotation speed control apparatus for the winding drum drive motor to provide feedback control. Accordingly, the motors can be synchronously decelerated and stopped without the use of a special external power supply.
- The present invention is configured so that the stop instruction means comprises a central control apparatus that operates upon the detection of a power stoppage. The central control apparatus transmits, via a control signal line, a stop instruction concurrently to the rotation speed control apparatus for the winding drum drive motor and the rotation speed control apparatus for each spindle drive motor.
- Thus, upon the detection of a power stoppage, the rotation speed control apparatuses decelerate and stop synchronously in the time period in response to the stop instruction from the central control apparatus, so the central control apparatus can use simple control functions to synchronously decelerate and stop the motors by simply transmitting the stop instruction. In addition, this configuration can obviate the needs for batteries or cells for controlling the central control apparatus during power stoppage.
- The present invention is configured so that said stopping means has a unit control section provided for each group of rotation speed control apparatuses for said spindle drive motor, and so that each of the said control sections comprises a control power supply line common to the plurality of rotation speed control apparatus belonging to the corresponding group of rotation speed control apparatus.
- Further, the present invention has an auxiliary power supply apparatus that includes a direct-current voltage transforming means for forming a control system voltage on the control power supply line using the voltage on the direct-current bus.
- Thus, during the deceleration period after the detection of a power stoppage, regenerative power from each spindle drive motor obtained through a drive power supply line can be converted into an appropriate voltage, which can be used as a control voltage for each group of rotation speed control apparatuses. In addition, the direct-current voltage transforming means for each group of rotation speed control apparatuses serves to simplify wiring and to prevent voltage drops, thereby enabling each rotation speed control apparatus to be decelerated and stopped reliably.
- The present invention provides an individual-spindle-drive type textile machine wherein a plurality of spindle units are installed in a line, each spindle unit having a drive motor, the plurality of drive motors being driven by rotation speed control apparatuses. The machine also comprises a direct-current bus having a first direct-current voltage for driving force and connecting the direct-current bus to said rotation speed control apparatuses, and direct-current voltage transforming means for transforming the first direct-current voltage into a second direct-current voltage for control, the machine being configured so that said plurality of rotation speed control apparatuses are divided into a plurality of units each including a specified number of these apparatuses, with said direct-current voltage transforming means provided for each of said units.
- Thus, the voltage drop can be prevented to increase the number of spindle units (winding units) that can be installed in a line in the individual-spindle-drive type textile machine.
- The present invention is configured so that the machine comprises a central control apparatus that includes a communication function and a relay device for unifying the rotation speed control apparatuses for the drive motors of each of said units. Moreover, said central control apparatus and each of said rotation speed control apparatuses are connected together via said relay device using a communication line.
- Thus, the central control apparatus can set parameters to control each motor for a large number of rotation speed control apparatuses. Even if the number of spindle units is increased, each rotation speed control apparatus can control its motor reliably.
- The present invention is configured so that each of said units has an equal number of said rotation speed control apparatuses connected to a single direct-current voltage transforming means and a single relay device.
- The wiring between the direct-current bus and communication line and each rotation speed control apparatus can thus be simplified.
- The present invention is configured so that the spindle drive motor is a brushless motor having a built-in sensor for detecting the rotational position of the rotor, the sensor being incorporated in a stator section located around a rotor that is a permanent magnet.
- Thus, since the sensor for detecting the rotational direction of the rotor is built into the motor, the rotation of the motor can be controlled while reliably preventing errors in detection caused by fiber dust. In addition, the use of the brushless motor can make each motor more compact and improve its efficiency.
Claims (5)
- Individual-spindle-drive type textile machine including yarn winding units (U) each having a spindle apparatus (2) and a winding apparatus (3) and first inverters (45) each of which drives a spindle drive motor (6) provided for the spindle of each yarn winding unit (U) and a second inverter (42) that drives a winding drum drive motor (4) commonly used by the yarn winding units,
characterized by
a power stoppage detection means (34) for detecting a power stoppage when the voltage of a power supply decreases by at least a specified value,
a stoppage instruction means (35) for outputting stopping instructions to each first inverter (45) and the second inverter (42) when a power stoppage is detected by the power stoppage detection means,
a first stoppage means provided for each first inverter (45) that detects the rotation speed of the associated spindle drive motor (6) and performs a feedback control of the rotation speed to stop the spindle drive motor (6) at a preset stopping time on the basis of the stopping instruction from the stopping instruction means, and
a second stopping means provided at the second inverter that detects the rotation speed of the winding drum drive motor (4) and performs a feedback control of the rotation speed to stop the winding drum drive motor (4) at a preset stopping time on the basis of the stopping instruction from the stoppage instruction means. - An individual-spindle-drive type textile machine according to Claim 1,
characterized in that
the first inverters (45) for the plurality of spindle drive motors (6) are connected to a common direct-current bus (47) disposed along the direction in which the yarn winding units (U) are installed in a line, and in that the second inverter (42) for the winding drum drive motor (4) is also connected to said direct-current bus (47). - An individual-spindle-drive type textile machine according to Claim 1 or Claim 2, characterized in that
said stoppage instruction means (35) comprises a central control apparatus that, upon detecting a power stoppage, transmits a stop instruction concurrently to the second inverter (42) for the winding drum drive motor (4) and the first inverters (45) for each spindle drive motor (6) via a control signal line. - An individual-spindle-drive type textile machine according to Claim 2 or Claim 3 characterized in that
said stopping means (35) has a unit control section (9) provided for each group of the in groups arranged first inverters (45) for said spindle drive motors (6) and in that each of said unit control sections (9) comprises a control power supply line common to the plurality of first inverters (45), and an auxiliary power supply (43) apparatus that includes a direct-current voltage transforming means for forming a control system voltage on the control power supply line using the voltage on said direct-current bus (47). - An individual-spindle-drive type textile machine according to any one of Claims 1 to 4,
characterized in that
said spindle drive motors (6) are brushless motors having a built-in sensor for detecting the rotational position of the rotor, the sensor being incorporated in a stator section located around a rotor that is a permanent magnet
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04012083A EP1460155B1 (en) | 1998-03-13 | 1999-02-23 | Individual-spindle-drive type textile machine with a plurality of spindles divided into units |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6235998 | 1998-03-13 | ||
JP06235998A JP3180754B2 (en) | 1998-03-13 | 1998-03-13 | Power outage treatment device in multiple twisting machine |
JP08092798A JP3235561B2 (en) | 1998-03-27 | 1998-03-27 | Control system for single spindle driven textile machine |
JP8092798 | 1998-03-27 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP04012083A Division EP1460155B1 (en) | 1998-03-13 | 1999-02-23 | Individual-spindle-drive type textile machine with a plurality of spindles divided into units |
Publications (3)
Publication Number | Publication Date |
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EP0942081A2 EP0942081A2 (en) | 1999-09-15 |
EP0942081A3 EP0942081A3 (en) | 2000-04-12 |
EP0942081B1 true EP0942081B1 (en) | 2004-05-26 |
Family
ID=26403417
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Application Number | Title | Priority Date | Filing Date |
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EP99103458A Expired - Lifetime EP0942081B1 (en) | 1998-03-13 | 1999-02-23 | Individual-spindle-drive type textile machine |
EP04012083A Expired - Lifetime EP1460155B1 (en) | 1998-03-13 | 1999-02-23 | Individual-spindle-drive type textile machine with a plurality of spindles divided into units |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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EP04012083A Expired - Lifetime EP1460155B1 (en) | 1998-03-13 | 1999-02-23 | Individual-spindle-drive type textile machine with a plurality of spindles divided into units |
Country Status (4)
Country | Link |
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EP (2) | EP0942081B1 (en) |
KR (1) | KR100474600B1 (en) |
CN (1) | CN1322188C (en) |
DE (2) | DE69932961T2 (en) |
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JP3638858B2 (en) † | 2000-07-19 | 2005-04-13 | 日特エンジニアリング株式会社 | Wire rod winding method and apparatus |
JP4048702B2 (en) * | 2000-08-02 | 2008-02-20 | 村田機械株式会社 | Motor drive system for single spindle driven textile machine |
FR2831350B1 (en) * | 2001-10-24 | 2007-08-10 | Rieter Icbt | METHOD FOR CONTROLLING AN ELECTRIC MOTOR INTEGRATED IN A WIRE COILING DEVICE |
FR2869329B1 (en) * | 2004-04-23 | 2006-06-16 | Rieter Textile Machinery Fr | DEVICE FOR MANAGING WIRE ASSEMBLIES IN TEXTILE MACHINERY FOR TRANSFORMING THESE YARNS |
WO2009132469A1 (en) * | 2008-04-30 | 2009-11-05 | Maschinenfabrik Rieter Ag | Spinning machine with single-spindle drive |
DE102009032716A1 (en) * | 2009-07-11 | 2011-01-13 | Oerlikon Textile Gmbh & Co. Kg | Workstation of an open-end rotor spinning machine and method for operating the workstation |
JP5689704B2 (en) * | 2010-08-08 | 2015-03-25 | 日本電産サンキョー株式会社 | Motor control device and motor control method |
WO2014087383A2 (en) * | 2012-12-06 | 2014-06-12 | Kordsa Global Endustriyel Iplik Ve Kord Bezi Sanayi Ve Ticaret Anonim Sirketi | A method for enabling the production machines in the cord production system to be stopped synchronously |
CN103276479A (en) * | 2013-06-18 | 2013-09-04 | 海宁市盛祥线业有限公司 | Winding mechanism on yarn covering machine |
CN103541057A (en) * | 2013-09-26 | 2014-01-29 | 吴江伊莱纺织科技有限公司 | Two-for-one twister spindle position driven by single-spindle motor |
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1999
- 1999-02-23 EP EP99103458A patent/EP0942081B1/en not_active Expired - Lifetime
- 1999-02-23 EP EP04012083A patent/EP1460155B1/en not_active Expired - Lifetime
- 1999-02-23 DE DE69932961T patent/DE69932961T2/en not_active Expired - Lifetime
- 1999-02-23 DE DE69917517T patent/DE69917517T2/en not_active Expired - Lifetime
- 1999-03-10 KR KR10-1999-0007850A patent/KR100474600B1/en not_active IP Right Cessation
- 1999-03-12 CN CNB99103676XA patent/CN1322188C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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DE69917517T2 (en) | 2005-06-30 |
EP0942081A3 (en) | 2000-04-12 |
DE69932961T2 (en) | 2007-05-10 |
DE69917517D1 (en) | 2004-07-01 |
EP1460155B1 (en) | 2006-08-23 |
CN1229863A (en) | 1999-09-29 |
KR19990077731A (en) | 1999-10-25 |
EP0942081A2 (en) | 1999-09-15 |
EP1460155A1 (en) | 2004-09-22 |
CN1322188C (en) | 2007-06-20 |
DE69932961D1 (en) | 2006-10-05 |
KR100474600B1 (en) | 2005-03-08 |
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