JP2007161449A - Yarn winder and yarn winding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn winding method capable of preventing failure, heating and the loss of synchronism of a traverse guide driving motor 45, by winding while keeping a single winding number WN up to finishing winding from a start of the winding, by using a yarn winding unit 2 with a traverse device having a traverse guide 11 and a traverse guide driving motor 45, by providing a package driving motor 41 rotatingly driving winding bobbins 6 and 7 for winding yarn and the traverse device 5 traversing the yarn. <P>SOLUTION: A rotating speed T of the package driving motor 41 is adjusted so that a rotating speed T of a traverse guide driving motor 45 becomes a limit rotating speed Tmax or less by a limit rotating speed reference control means 83 until a winding bobbin diameter D becomes a predetermined limit diameter Dend. After the winding bobbin diameter D reaches the limit diameter Dend, a rotating speed B of the package driving motor 41 is adjusted so that a yarn winding speed WS becomes a request yarn winding speed WSd by a yarn winding speed reference control means 85. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a yarn winding device and a yarn winding method for winding a yarn around a winding bobbin while traversing the yarn with a traverse device.

  This type of yarn winding device is disclosed in, for example, Patent Document 1, and the yarn winding device of Patent Document 1 includes a winding bobbin rotation drive motor for rotationally driving a winding bobbin for winding a yarn, A traverse device for traversing the yarn when winding the yarn onto the take-up bobbin. In the yarn winding device of Patent Document 1, the traverse device is driven separately from the traverse guide for engaging the yarn and traversing the yarn, and the winding bobbin rotation drive motor, and moves the traverse guide. And a traverse guide drive motor. In addition, the yarn winding device of Patent Document 1 includes a control device that controls the winding bobbin rotation driving motor and the traverse guide driving motor.

Patent Document 1 discloses that a winding type package that is a precision winding or a step precision winding can be manufactured by providing a traverse guide driving motor separately from a winding bobbin rotation driving motor.
JP 2002-68587 A (0002, 0029-0031, etc.)

The precision winding method is a method of winding while maintaining a single winding number from the start of winding to the end of winding. In this precision winding, the winding speed (winding bobbin circumferential speed) is WS, the winding bobbin diameter is D, the winding bobbin rotational speed is B, the traverse angle is WA, the winding number is WN, and the yarn traverse When the speed is TS, the following equations (a) to (c) are established.
WS = π × D × B (a)
TS = WS × tanWA (b)
tanWA = 2 × TW / (π × D × WN) (c)

Then, when the expressions (a) and (c) are substituted into the expression (b), the following expression (d) is established.
TS = WS × tan WA = B × 2 × TW / WN (d)

  In this precision winding, if the yarn is wound at the required yarn winding speed in order to ensure productivity, the rotational speed of the traverse guide drive motor exceeds the limit rotational speed when the set value of the wind number WN is small. There is a possibility. In particular, when the diameter D of the winding bobbin is small, the yarn traverse speed TS becomes high, and this possibility is great. This is a particular problem when the traverse guide drive motor is configured to reciprocate the traverse guide by forward and reverse rotation of its motor shaft, because the limit rotational speed is lowered due to the moment of inertia.

  The present invention has been made in view of the above points, and an object thereof is to provide a yarn winding device and a yarn winding method that can be controlled so as not to exceed the limit rotational speed of the traverse guide drive motor.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

According to the first aspect of the present invention, a take-up bobbin rotation drive motor for rotationally driving a take-up bobbin for taking up a yarn, and the yarn is wound when the yarn is wound around the take-up bobbin. A traverse device for traversing the traverse device, the traverse guide for engaging the yarn and traversing the yarn, and the winding bobbin rotation drive motor are separated and driven, and the traverse device The following yarn winding method using a yarn winding device having a traverse guide drive motor for moving the guide is provided.
That is, in the yarn winding method for winding a yarn around the winding bobbin while maintaining a single winding number from the start of winding of the yarn to the winding bobbin to the end of winding, the diameter of the winding bobbin is a predetermined diameter. Until the rotation speed of the take-up bobbin rotation drive motor is adjusted so that the rotation speed of the traverse guide drive motor is equal to or less than the limit rotation speed, and the diameter of the take-up bobbin reaches a predetermined diameter. Adjusts the rotation speed of the winding bobbin rotation drive motor so that the yarn winding speed becomes the required yarn winding speed.

  By this method, when the yarn is wound around the winding bobbin while maintaining a single winding number from the start of winding of the yarn to the end of winding, until the diameter of the winding bobbin reaches a predetermined diameter, The rotation speed of the winding bobbin rotation drive motor is set to be lower than the rotation speed for achieving the required yarn winding speed so that the rotation speed of the traverse guide drive motor is less than the limit rotation speed, and the diameter of the winding bobbin After reaching a predetermined diameter, the rotation speed of the winding bobbin rotation drive motor can be made the required yarn winding speed. Therefore, it is possible to prevent the rotation speed of the traverse guide drive motor from exceeding the limit rotation speed, to avoid the heat generation, failure, step-out, etc. of the motor, and after the winding bobbin diameter reaches the predetermined diameter. Can wind the yarn at the required yarn winding speed.

  In the yarn winding method, it is preferable that the traverse guide is reciprocated by forward and reverse rotation of a motor shaft of the traverse guide drive motor.

  As described above, when using a traverse device that reciprocates the traverse guide by forward and reverse rotation of the motor shaft of the traverse guide drive motor and traverses the yarn, the limit of the traverse guide drive motor due to the inertia force The rotation speed is lowered. However, even in such a case, according to the above method, the rotational speed of the traverse guide drive motor can be prevented from exceeding the limit rotational speed.

According to the 2nd viewpoint of this invention, the yarn winding apparatus comprised as follows is provided. That is, a winding bobbin rotation drive motor for rotating a winding bobbin for winding the yarn, and a traverse device for traversing the yarn when winding the yarn onto the winding bobbin. A traverse guide for driving the traverse guide separated from the winding bobbin rotation drive motor and moving the traverse guide. And a motor. The yarn winding device includes a control device that controls the winding bobbin rotation driving motor and the traverse guide driving motor.
The control device stores relational expression storage means for storing a relational expression between the rotational speed of the winding bobbin rotational drive motor and the rotational speed of the traverse guide drive motor, and stores the limit rotational speed of the traverse guide drive motor. The rotation speed of the traverse guide drive motor stored in the limit rotation speed storage means is maintained while maintaining the relationship between the limit rotation speed storage means and the relational expression stored in the relational expression storage means. Limit rotation speed reference control means for controlling the rotation speed of the traverse guide drive motor and the rotation speed of the take-up bobbin rotation drive motor so as to be equal to or lower than the limit rotation speed.

  With this configuration, the take-up bobbin rotation drive motor and the traverse guide drive motor are controlled in association with each other so that the rotation speed of the take-up bobbin rotation drive motor and the rotation speed of the traverse guide drive motor maintain a predetermined relational expression. In this case, it is possible to prevent the rotation speed of the traverse guide drive motor from exceeding the limit rotation speed, and to avoid heat generation, failure, step-out, etc. of the motor.

  In the yarn winding device, the traverse device is preferably configured to reciprocate the traverse guide by forward and reverse rotation of a motor shaft of the traverse guide drive motor.

  With this configuration, even when a traverse device of a type in which the traverse guide is reciprocated by forward and reverse rotation of the motor shaft of the traverse guide drive motor to traverse the yarn is used, the rotational speed of the traverse guide drive motor is It is possible to prevent exceeding the limit rotation speed.

  The yarn winding device is preferably configured as follows. That is, the control device maintains the relationship between the required yarn winding speed storage means for storing the required value of the yarn winding speed and the relational expression stored in the relational expression storage means, while the yarn winding speed is the required yarn winding speed. Thread winding speed reference control means for controlling the rotational speed of the traverse guide drive motor and the rotational speed of the winding bobbin rotational drive motor so as to obtain the required yarn winding speed stored in the speed storage means; When it is possible to set the required yarn winding speed stored in the yarn winding speed storage means and the rotational speed of the traverse guide drive motor to be equal to or lower than the limit rotation speed stored in the limit rotation speed storage means, The control of the rotational speed of the traverse guide drive motor and the rotational speed of the winding bobbin rotational drive motor is controlled from the limit rotational speed reference control means by the yarn winding speed reference control. And a control switching means for switching the means.

  With this configuration, the yarn can be wound at the required yarn winding speed as much as possible so that the rotational speed of the traverse guide drive motor does not exceed the limit rotational speed.

  The yarn winding device is preferably configured as follows. That is, a winding bobbin diameter detecting means for detecting the diameter of the winding bobbin is provided. The relational expression stored in the relational expression storage means is an expression for maintaining a single wind number from the start of winding of the yarn around the winding bobbin to the end of winding. In the control switching means, the yarn winding speed is set to the required yarn winding speed stored in the required yarn winding speed storage means, and the rotation speed of the traverse guide drive motor is equal to or less than the limit rotation speed stored in the limit rotation speed storage means. The condition that can be made is that the diameter of the take-up bobbin exceeds a predetermined diameter. The control switching means switches from the limit rotational speed reference control means to the yarn winding speed reference control means when the winding bobbin diameter detected by the winding bobbin diameter detection means exceeds the predetermined diameter.

  With this configuration, when the yarn is wound around the winding bobbin while maintaining a single winding number from the start of winding of the yarn to the end of winding, the rotational speed of the traverse guide drive motor exceeds the limit rotational speed. Can be prevented, and heat generation, failure, step-out, etc. of the motor can be avoided, and the yarn can be wound at the required yarn winding speed after the diameter of the winding bobbin reaches a predetermined diameter.

  Next, embodiments of the invention will be described. FIG. 1 is a schematic front view and a block diagram showing a yarn winding unit of an automatic winder according to an embodiment of the present invention. FIG. 2 is a flow chart for explaining the winding speed and traverse guide control for realizing precision winding in this embodiment, and FIG. 3 is the yarn winding speed from the start of winding, the rotational speed of the traverse drive motor in this embodiment, and The graph which shows the change of the rotational speed of a package drive motor, FIG. 4 is the model front view and block diagram which show the modification of a traverse apparatus.

  First, the yarn winding unit (yarn winding device) 2 of the automatic winder 1 will be described with reference to FIG. The yarn winding unit 2 forms a yarn layer by winding a yarn 4 of a yarn supplying bobbin 3 around a winding tube 6 while traversing it with a traverse device 5 to form a package 7 having a predetermined length and a predetermined shape. . Although only one yarn winding unit 2 is shown in FIG. 1, an automatic winder 1 is configured by arranging a large number of such yarn winding units 2 on a machine base (not shown). In this specification, the winding tube 6 and the package 7 are collectively referred to as a winding bobbin. That is, the winding bobbin in which the yarn layer is not formed is the winding tube 6, and the winding bobbin in which the yarn layer is formed is the package 7.

  The yarn winding unit 2 includes a cradle (winding bobbin support member) 8 that removably supports the winding tube 6 and a contact roller 9 that can be driven and rotated in contact with the circumferential surface of the yarn layer of the package 7. I have. The cradle 8 is configured such that it can be rotatably supported by sandwiching both ends of the take-up tube 6. The cradle 8 is configured to be tiltable about the swing shaft 10, and the cradle 8 increases the winding thickness (increase in the diameter of the yarn layer) associated with winding the yarn 4 around the winding tubes 6 and 7. Can be absorbed by swinging.

  A package driving motor (winding bobbin rotation driving motor) 41 is attached to a portion of the cradle 8 that sandwiches the winding tube 6, and the winding tube 6 is rotationally driven by the package driving motor 41 to feed the yarn 4. It is configured to wind up. The motor shaft of the package drive motor 41 is connected to the winding tube 6 so as not to rotate relative to the winding tube 6 when the winding tube 6 is gripped by the cradle 8 (so-called direct drive system). The operation of the package drive motor 41 is controlled by a package drive control unit 42, and the package drive control unit 42 is configured to control the operation / stop of the package drive motor 41 in response to a signal from the unit control unit 50. ing.

  Further, a package rotation sensor (winding bobbin rotation angle sensor) 43 is attached to the cradle 8, and the package rotation sensor 43 is a winding bobbin (winding tube 6, package 7) attached to the cradle 8. Is detected (how many times the winding bobbin has rotated). The rotation angle detection signals of the winding bobbins 6 and 7 are transmitted from the package rotation sensor 43 to the package drive control unit 42 and the unit control unit 50. Further, the rotation angle detection signal is also input to a traverse control unit 46 described later.

  Further, a package diameter sensor (winding bobbin diameter detecting means) 44 composed of a rotary encoder or the like is attached to the cradle 8, and the package diameter sensor 44 is the winding tube 6 attached to the cradle 8, or this The diameter of the package 7 formed by winding the yarn 4 around the winding tube 6 can be detected by detecting the swing angle of the cradle 8. The package diameter sensor 44 can detect the diameters of the winding bobbins 6 and 7 both when the yarn 4 is being wound and when the winding of the yarn 4 is stopped. The diameters of the winding bobbins 6 and 7 acquired by the package diameter sensor 44 are transmitted to the unit controller 50 and transferred from the unit controller 50 to the package drive controller 42 and the traverse controller 46.

  The traverse device 5 is provided in the vicinity of the contact roller 9, and the traverse device 5 allows the yarn 4 to be wound around the winding bobbins 6 and 7 while traversing. The traverse device 5 includes a traverse guide (yarn guide) 11 provided so as to be reciprocally movable in the traverse direction, and a traverse guide drive motor 45 as drive means for reciprocatingly driving the traverse guide 11.

  The traverse device 5 has an endless timing belt 31 disposed in the vicinity of the contact roller 9, a traverse guide 11 is fixed to the timing belt 31, and the timing belt 31 is driven by a traverse guide as a pulse motor, for example. The motor 45 is configured to reciprocate. The timing belt 31 is wound around driven pulleys 32 and 32 installed at both ends in the traverse direction of the traverse guide 11 and an outer side of a drive pulley 33 fixed to an output shaft (motor shaft) of the traverse guide drive motor 45. Yes. The traverse guide 11 can be reciprocated via the drive pulley 33 and the timing belt 31 by rotating the output shaft of the traverse guide drive motor 45 forward and backward.

  The operation of the traverse guide drive motor 45 is controlled by a traverse control unit 46, and the traverse control unit 46 is configured to control the operation / stop of the traverse guide drive motor 45 in response to a signal from the unit control unit 50. ing. The traverse device 5 includes a traverse guide position sensor 47 formed of a rotary encoder or the like, detects the rotational position of the drive pulley 33 (and consequently the position of the traverse guide 11), and sends a position signal to the traverse control unit 46. It is configured to be able to send.

  In the present embodiment, as shown in FIG. 1, the package drive motor 41 that drives the take-up bobbins 6 and 7 and the traverse guide drive motor 45 that drives the traverse guide 11 are provided separately, and the winding The take bobbins 6 and 7 and the traverse guide 11 are configured to be driven (controlled) separately and independently. Thereby, when winding the yarn 4 onto the winding bobbins 6 and 7, various winding methods such as precision winding, step precision winding, and random winding can be realized. In particular, the present embodiment is configured such that precision winding can be performed by winding a single (fixed) number of winds from the start of winding to the end of winding by the control described later.

  Next, the yarn joining device 14 and the yarn clearer 15 will be described. That is, the yarn winding unit 2 is configured such that the yarn joining device 14 and the yarn clearer 15 are disposed in order from the yarn feeding bobbin 3 side in the yarn traveling path between the yarn feeding bobbin 3 and the contact roller 9. ing.

  The yarn joining device 14 includes a lower yarn on the yarn supplying bobbin 3 side and a package 7 side when the yarn clearer 15 detects a yarn defect and performs yarn cutting or when yarn breakage occurs during yarn unwinding from the yarn supplying bobbin 3. The upper thread is connected to the upper thread.

  Further, the yarn clearer 15 is for detecting a thickness defect of the yarn 4, and the thickness of the yarn 4 passing through the detecting portion of the yarn clearer 15 is detected by an appropriate sensor, By analyzing the signal with the analyzer 23, a yarn defect such as a slab is detected. The yarn clearer 15 is provided with a cutter 16 for cutting the yarn 4 immediately when a yarn defect is detected.

  On the lower side and the upper side of the yarn joining device 14, a lower yarn catching guide means 17 for sucking and catching and guiding the lower yarn on the yarn feeding bobbin 3 side, and an upper yarn for sucking and catching and guiding the upper yarn on the package 7 side. A capture guide means 20 is provided. The upper thread catching and guiding means 20 is configured in a pipe shape, and is provided so as to be rotatable up and down around a shaft 21, and a mouse 22 is provided on the tip side thereof. Similarly, the lower thread catching and guiding means 17 is also configured in a pipe shape, and is provided so as to be rotatable up and down around a shaft 18, and a suction port 19 is provided at the tip side thereof. An appropriate negative pressure source is connected to the upper thread catching and guiding means 20 and the lower thread catching and guiding means 17 so as to cause the mouse 22 and the suction port 19 at the tip to generate a suction action.

  The automatic winder 1 of the present embodiment is configured as described above, and a control unit (control device) 60 for performing precision winding in the yarn winding unit 2 of the automatic winder 1 includes a unit control unit 50, package driving The control unit 42 and the traverse control unit 46 are included at least.

  Next, control of the unit control unit 50, the package drive control unit 42, and the traverse control unit 46 for performing the above-described precision winding will be described with reference to the flow of FIG. In the present embodiment, the package drive control unit 42 and the traverse control unit 46 are configured as a microcomputer, and include a CPU as a calculation unit (not shown), a ROM, a RAM, and the like as storage units. Similarly, the unit controller 50 includes a CPU, a ROM, a RAM, etc. (not shown).

  The unit controller 50 includes a relational expression storage means 81, a limit rotation speed storage means 82, a limit rotation speed reference control means 83, a required yarn winding speed storage means 84, a yarn winding speed reference control means 85, and a control switching. Means 86.

The relational expression storage unit 81 stores the following relational expression (1) between the rotational speed of the package drive motor 41 and the rotational speed of the traverse guide drive motor 45.
T = B × 2 × TW / (π × D _pl × WN) (1)
Here, T is the rotational speed of the traverse guide drive motor 45, B is the rotational speed of the package drive motor 41, TW is the traverse width, _Dpl is the diameter of the drive pulley 33, and WN is the number of winds. The diameter D _pl of traverse width TW and the drive pulley 33 is a numerical value predetermined, wind number WN is determined to a fixed value.

  In the yarn winding control in the yarn winding unit 2, the relationship of the relational expression (1) is maintained from the start of winding the yarn 4 to the winding bobbins 6 and 7 to the end of winding. That is, the rotational speed T of the traverse guide drive motor 45 and the rotational speed B of the package drive motor 41 are maintained so as to maintain a single wind number WN from the start of winding the yarn 4 onto the winding bobbins 6 and 7 to the end of winding. Be controlled. Thus, precision winding can be performed in the yarn winding unit 2.

The diameter D _pl and wind number WN of the traverse width TW, the drive pulley 33, can be set by the host computer of the setter 87 provided in the automatic winder 1 can be changed.

The relational expression (1) is an expression derived as follows. Assuming that the yarn winding speed (the peripheral surface speed of the winding bobbins 6 and 7) is WS, the diameter of the winding bobbins 6 and 7 is D, the traverse angle is WA, and the yarn traverse speed is TS, the following geometrically: The following equation holds.
WS = π × D × B (2)
TS = WS × tanWA (3)
tanWA = 2 × TW / (π × D × WN) (4)
TS = T × π × D _pl (5)
In addition, said Formula (2)-(4) is the same as said Formula (a)-(c). Then, the relational expression (1) can be derived by substituting the expressions (2), (4), and (5) into the expression (3).

The limit rotation speed storage means 82 stores the limit rotation speed T _max of the traverse guide drive motor 45. This limit rotational speed T _max can be set and changed by a setting device 87. In the present embodiment, the limit rotational speed T _max is set to an empirically obtained value in consideration of the performance of the traverse guide drive motor 45 and the inertial force applied to the motor.

The limit rotational speed reference control means 83 maintains the relationship of the relational expression (1) stored in the relational expression storage means 81 while the rotational speed T of the traverse guide drive motor 45 is stored in the limit rotation speed storage means 82. The rotational speed T of the traverse guide drive motor 45 and the rotational speed B of the package drive motor 41 are controlled so as to be equal to or lower than the speed _Tmax .

The requested yarn winding speed storage means 84 stores a requested value WS _d for the yarn winding speed WS. The required yarn winding speed WS _d can be set and changed by the setting device 87.

The yarn winding speed reference control means 85 maintains the relationship of the relational expression (1) stored in the relational expression storage means 81, while the required yarn winding speed WS is stored in the required yarn winding speed storage means 84. The rotational speed T of the traverse guide drive motor 45 and the rotational speed B of the package drive motor 41 are controlled so that the speed becomes WS _d .

The control switching unit 86 sets the yarn winding speed WS to the required yarn winding speed WS _d stored in the required yarn winding speed storage unit 84, and stores the rotational speed T of the traverse guide drive motor 45 in the limit rotational speed storage unit 82. The control of the rotation speed T of the traverse guide drive motor 45 and the rotation speed B of the package drive motor 41 is performed from the limit rotation speed reference control means 83 under the condition that it is possible to make the limit rotation speed T _max or less. It switches to the speed reference control means 85.

Here, the possible condition is that the diameter D of the winding bobbins 6 and 7 exceeds a predetermined diameter (limit diameter) _Dend . The limit diameter D _end is obtained by substituting “T _max ” into “T” in the relational expression (1) to obtain “B”, and substituting “WS _d ” into “WS” in the above expression (2). By substituting “B” obtained in relational expression (1) into “B” in the same expression (2), it can be obtained automatically. That is, the limit diameter D _end is automatically obtained by the following equation (6).
D _end = 2 × WS _d × TW / (π ² × D _pl × WN × T _max ) (6)
In the present embodiment, the limit diameter D _end is calculated by the host computer in the automatic winder 1, but may be calculated by the unit control unit 50 of the yarn winding unit 2.

As described above, in the yarn winding unit 2, precision winding is realized by controlling the package drive motor 41 and the traverse guide drive motor 45 in accordance with the relational expression (1). However, as described above, if the set wind number WN, the traverse width TW, and the required yarn winding speed WS _d are simply applied to the relational expressions (1) and (2), the traverse guide drive motor 45 is controlled. Problems may occur. That is, as seen from equation (2), if when the winding yarn 4 at the required yarn winding speed WS _d for an empty winding bobbin 6, immediately after the winding start at the stage of the winding bobbin 6 or 7 in diameter Since D is small, the rotational speed B of the package drive motor 41 increases. Therefore, in order to maintain the relationship of the relational expression (1), the rotational speed T of the traverse guide drive motor 45 must be increased. Therefore, at the beginning of winding the yarn 4 onto the winding bobbins 6 and 7, the traverse guide drive motor 45 needs to be rotated at a high speed, and the rotation speed T exceeds the maximum rotation speed allowed by the traverse guide drive motor 45. If this occurs, the traverse guide drive motor 45 may be broken or the life of the traverse guide drive motor 45 may be significantly shortened.

In this embodiment, in view of this point, the unit controller 50 is configured to be able to preset and store a limit rotational speed T _max that can be allowed by the traverse guide drive motor 45. The unit control section 50 also rotates the winding bobbin 6, 7 so that the demands yarn winding speed WS _d, the rotational speed T of the traverse guide driving motor 45 can not exceed the maximum speed limit T _max the diameter D _{end the} winding bobbin 6, 7, and stores input from pre host computer before the start of winding.

  FIG. 2 is a flowchart of winding control in the yarn winding unit 2 of the automatic winder 1 of the present embodiment. In the yarn winding unit 2 of the automatic winder 1 of the present embodiment, winding of the yarn 4 onto the winding tube 6 is first started in the process of S101 in FIG.

After starting the yarn winding, the unit controller 50 obtains the diameter (winding bobbin diameter) D of the yarn layer formed by being wound around the winding tube 6 from the package diameter sensor 44 (S102). The wound bobbin diameter D is compared with the limit diameter D _end (S103).

When the current winding bobbin diameter D does not exceed the limit diameter D _end , it is a timing of the winding start and there is a concern about over-rotation of the traverse guide drive motor 45 as described above. As shown in (7), the rotational speed T of the traverse guide drive motor 45 is set to the limit rotational speed _Tmax .
T = T _max (7)

Further, the rotational speed B of the package drive motor 41 is obtained according to the following equation (8).
B = π × D _pl × WN × T _max / (2 × TW) (8)
Note that the above formula is obtained by substituting “T _max ” into “T” in the relational expression (1) and transforming it into the form of B =.

As described above, when the current winding bobbin diameter D does not exceed the limit diameter D _end , the unit control unit 50 determines the rotational speed B of the package drive motor 41 based on the above equation (8) in the process of S104. And the package drive control unit 42 controls the package drive motor 41 in accordance with this. Similarly, the unit controller 50 instructs the traverse controller 46, and the traverse controller 46 follows the equation (7) so that the rotational speed T of the traverse guide drive motor 45 becomes the limit rotational speed _Tmax. The drive motor 45 is controlled. Then, the unit controller 50 determines whether or not the winding has been completed in the process of S106, and if the winding has not been completed, the process returns to the process of S102. If it is determined that the winding has been completed, the series of processes is terminated. Various conditions may be considered for the end of winding, such as when the yarn 4 is wound around the winding tube 6 for a predetermined length and becomes full, or when an emergency stop signal is received from a host computer. It is done.

On the other hand, in the process at S103, so if the current of the winding bobbin diameter D detected by the package diameter sensor 44 is determined to exceed the limit diameter D _{end The,} the required yarn winding speed WS _d winding Even if the take-up bobbins 6 and 7 are rotated, the rotational speed T of the traverse guide drive motor 45 does not exceed the limit rotational speed T _max , so there is no risk of over-rotation. That enables the winding a yarn 4 while the yarn winding speed WS and the required yarn winding speed WS _d, and a to the rotational speed T of the traverse guide driving motor 45 below the maximum speed limit T _max. Therefore, in this case, the process proceeds to S105, and the unit controller 50 obtains the rotational speed B of the package drive motor 41 according to the following equation (9).
B = WS _d / (π × D) (9)
The above formula is obtained by substituting “WS _d ” into “WS” in the formula (2) and transforming it into the form of B =.

Further, the unit controller 50 obtains the rotational speed T of the traverse guide drive motor 45 according to the following equation (10).
T = 2 × TW × WS _d / (π ² × D _pl × WN × D) (10)
In addition, said formula substitutes "B" of Formula (9) for "B" of said relational expression (1).

  Then, the unit control unit 50 determines whether or not the winding has been completed by the process of S106. If the winding has not been completed, the unit control unit 50 returns to the process of S102, and if the winding has been completed, The process ends.

  Changes in the yarn winding speed WS, the rotational speed T of the traverse guide drive motor 45, and the rotational speed B of the package drive motor 41 by the above control will be described with reference to FIG. 3A shows a change in the yarn winding speed WS, FIG. 3B shows a change in the rotational speed T of the traverse guide drive motor 45, and FIG. 3C shows a package drive motor. 41 shows the change in the rotational speed B, and the horizontal axis of each graph shows the winding bobbin diameter D (in other words, the degree of advancement of the winding of the yarn 4).

In the first winding process (D ≦ D _end ) as the winding start stage, the process of S104 in FIG. 2 (control by the limit rotational speed reference control means 83) is performed, so as shown in the graph of (b). Further, the rotational speed T of the traverse guide drive motor 45 is constant at the limit rotational speed _Tmax , and the yarn winding speed WS increases from the low speed side as the winding bobbin diameter D increases as shown in the graph of (a). slide into gradually accelerated so as to approach the request line winding speed WS _d. In addition, as shown in the graph of (c), the rotational speed B of the package drive motor 41 is constant at a predetermined speed. This control realizes precision winding with maximum production efficiency while preventing failure, heat generation, step-out, and the like due to excessive rotation of the traverse guide drive motor 45.

Then, when the winding of the yarn 4 proceeds and D> D _end , the process proceeds to the second winding step and the processing of S105 in FIG. 2 (control by the yarn winding speed reference control means 85) is performed. As shown in the graph (a), the yarn winding speed WS is constant at the required yarn winding speed WS _d , and as shown in the graph (b), the rotational speed T of the traverse guide drive motor 45 is the winding bobbin diameter. It gradually decreases as D increases. In order to keep the yarn winding speed WS constant at the required yarn winding speed WS _d as described above, the rotational speed B of the package drive motor 41 is equal to the winding bobbin diameter D as shown in the graph of (c). Decrease gradually with increasing. By this control, normal precision winding at the required yarn winding speed WS _d is realized.

As described above, the yarn winding unit 2 of the automatic winder 1 according to the present embodiment includes the package driving motor 41 for rotationally driving the winding bobbins 6 and 7 for winding the yarn 4, and the winding bobbin 6. , 7 and a traverse device 5 for traversing the yarn 4 when the yarn 4 is wound. The traverse device 5 is a traverse guide 11 for engaging the yarn 4 and traversing the yarn 4, and the traverse guide 11 for moving the traverse guide 11, which is driven separately from the package drive motor 41. Drive motor 45. Then, by the following method, the yarn 4 is wound around the winding bobbins 6 and 7 while maintaining a single winding number WN from the start of winding the yarn onto the winding bobbins 6 and 7 to the end of winding. . That is, until the take-up bobbin diameter D reaches a predetermined diameter (limit diameter D _end ), the package drive motor 41 is controlled so that the rotational speed T of the traverse guide drive motor 45 becomes equal to the limit rotational speed T _max . Rotational speed B is adjusted. After the winding bobbin diameter D has reached the limit diameter D _{end The} adjusts the rotation speed B of the package driving motor 41 to the yarn winding speed becomes the required yarn winding speed WS _d.

Therefore, when the yarn is wound around the winding bobbins 6 and 7 while maintaining a single winding number WN from the start of winding of the yarn 4 to the end of winding, the winding bobbin diameter D becomes the limit diameter _Dend . made up, as the rotational speed of the traverse guide driving motor 45 becomes equal to or less than the limit rotational speed T _max, low rotation than the rotational speed to achieve speed WS _d preparative request winding rotation speed B of the package driving motor 41 and velocity, after the winding bobbin diameter D has reached the limit diameter D _{end the} can the rotational speed B of the package driving motor 41 to the required yarn winding speed WS _d. Therefore, it is possible to prevent the rotation speed T of the traverse guide drive motor 45 from exceeding the limit rotation speed T _max , to avoid heat generation, failure, step-out, etc. of the traverse guide drive motor 45 and to take-up bobbin diameter D after There reaching the limit diameter D _{end the} can wind the yarn 4 at the required yarn winding speed WS _d.

In this embodiment, the traverse guide 11 is reciprocated by forward and reverse rotation of the motor shaft of the traverse guide drive motor 45. In this case, the limit rotational speed T _max of the traverse guide drive motor 45 is related to the inertial force acting on the traverse guide 11, the timing belt 31, the drive pulley 33, the driven pulley 32, the rotor portion of the traverse guide drive motor 45, and the like. Tends to be low. However, even in such a case, according to the above-described yarn winding method, the rotational speed T of the traverse guide drive motor 45 can be prevented from exceeding the limit rotational speed _Tmax .

Further, the yarn winding unit 2 of the present embodiment includes a control device 60 that controls the package drive motor 41 and the traverse guide drive motor 45. The unit control unit 50 constituting the control device 60 stores a relational expression (the relational expression (1)) between the rotational speed B of the package drive motor 41 and the rotational speed T of the traverse guide drive motor 45. The relational expression storage means 81, the limit rotational speed storage means 82 for storing the limit rotational speed _Tmax of the traverse guide drive motor 45, and the relational expression (1) stored in the relational expression storage means 81 are maintained. However, the rotation speed of the traverse guide drive motor 45 is set so that the rotation speed of the traverse guide drive motor 45 is equal to the limit rotation speed T _max of the traverse guide drive motor 45 stored in the limit rotation speed storage means 82. T and limit rotational speed reference control means 83 for controlling the rotational speed B of the package drive motor 41.

Therefore, the package drive motor 41 and the traverse guide drive motor 45 are associated with each other and controlled so that the rotation speed B of the package drive motor 41 and the rotation speed T of the traverse guide drive motor 45 maintain the relationship of the relational expression (1). In this case, the rotation speed T of the traverse guide drive motor 45 can be prevented from exceeding the limit rotation speed T _max , and heat generation, failure, step-out, etc. of the traverse guide drive motor 45 can be avoided.

Further, the control device 60 maintains the relationship between the required yarn winding speed storage means 84 for storing the required value WS _d of the yarn winding speed and the relational expression (1) stored in the relational expression storage means 81, The yarn winding for controlling the rotational speed T of the traverse guide drive motor 45 and the rotational speed B of the package drive motor 41 so that the yarn winding speed WS becomes the required yarn winding speed WS _d stored in the required yarn winding speed storage means 84. The take-up speed reference control means 85, the yarn take-up speed WS is set to the required yarn take-up speed WS _d stored in the required yarn take-up speed storage means 84, and the rotational speed T of the traverse guide drive motor 45 is stored in the limit rotational speed. The rotation speed T of the traverse guide drive motor 45 and the package drive are obtained under conditions that allow the rotation speed to be less than or equal to the limit rotation speed T _max stored in the means 82. Control switching means 86 for switching the control of the rotational speed B of the dynamic motor 41 from the limit rotational speed reference control means 83 to the yarn winding speed reference control means 85.

Therefore, as the rotational speed T of the traverse guide driving motor 45 does not exceed the maximum speed limit T _max, as long as it is possible to wind the yarn 4 can be in demand yarn winding speed WS _d, to increase the production efficiency it can.

Further, the yarn winding unit 2 of the automatic winder 1 according to this embodiment includes a package diameter sensor 44 that detects the winding bobbin diameter D. The relational expression (1) stored in the relational expression storage means 81 is an expression for maintaining a single wind number WN from the start of winding the yarn 4 onto the winding bobbins 6 and 7 to the end of winding. It has become. Then, the control switching means 86 sets the yarn winding speed WS to the required yarn winding speed WS _d stored in the required yarn winding speed storage means 84 and the rotational speed T of the traverse guide drive motor 45 is set to the limit rotational speed. The condition under which the rotational speed T _max stored in the storage means 82 can be made equal to or lower than that is that the winding bobbin diameter D exceeds a predetermined limit diameter D _end . Further, when the winding bobbin diameter D detected by the package diameter sensor 44 exceeds the limit diameter D _end , the control switching means 86 changes from the limit rotation speed reference control means 83 to the yarn winding speed reference control means 85. It is configured to switch to.

Therefore, when the yarn 4 is wound around the winding bobbins 6 and 7 while maintaining a single winding number WN from the start of winding of the yarn 4 to the end of winding, the rotational speed T of the traverse guide drive motor 45 is Exceeding the limit rotational speed _Tmax can be prevented, heat generation, failure, step-out, etc. of the traverse guide drive motor 45 can be avoided, and after the take-up bobbin diameter D reaches the limit diameter _Dend , a request is made. it is possible to take up the thread 4 in the yarn winding speed WS _d.

  The configuration disclosed above is an example, and can be changed as follows, for example.

In the process of S102 in FIG. 2, traversing the rotational speed T of the guide drive motor 45, rather than equal to the maximum speed limit T _max, and controlled to a low predetermined speed than the maximum speed limit T _max Also good.

  As the winding bobbin diameter detecting means for acquiring the winding degree of the yarn 4, one capable of detecting the diameters of the winding bobbins 6 and 7 even when the winding of the yarn 4 is stopped is preferable. However, instead of obtaining the winding bobbin diameter D from the package diameter sensor 44, for example, the advancement degree of winding is the accumulated winding length from the start of winding the yarn 4, or the elapsed time from the start of winding. Etc.

  In place of the traverse device 5 shown in FIG. 1, as shown in FIG. 4, a traverse guide 11 'is provided in the form of a hook at the tip of an elongated arm member 13 configured to be rotatable around a support shaft. The base end portion of the member 13 can be fixed to the motor shaft of a traverse guide drive motor 45 ′ constituted by a voice coil motor, and the arm member 13 can be reciprocally swiveled as indicated by the arrow in FIG. 4. . In addition, it is possible to change to a traverse device having another configuration such as a configuration in which a cam groove is spirally formed on the outer peripheral surface of the drum-shaped traverse cam and a traverse guide is engaged with the cam groove.

  The present invention is not limited to the automatic winder 1, and a winding bobbin for winding a yarn can be set. It can be applied to a yarn machine, a twisting machine, and the like.

The schematic front view and block diagram of a yarn winding unit of an automatic winder according to an embodiment of the present invention. The flowchart figure explaining control of the winding speed and traverse guide for implement | achieving precision winding in this embodiment. The graph figure which shows the change of the yarn winding speed from the winding start in this embodiment, the rotational speed of a traverse drive motor, and the rotational speed of a package drive motor. The schematic front view and block diagram which show another embodiment of this invention to which the modification of a traverse apparatus is applied.

Explanation of symbols

1 Automatic winder 2 Yarn winding unit (yarn winding device)
4 Thread 6 Winding tube (empty winding bobbin)
7 Package (winding bobbin with thread layer)
11 Traverse guide 41 Package drive motor 44 Package diameter sensor (winding bobbin diameter sensor)
45 Traverse guide drive motor 50 Unit controller 60 Controller 81 Relational expression storage means 82 Limit rotation speed storage means 83 Limit rotation speed reference control means 84 Required yarn winding speed storage means 85 Yarn winding speed reference control means 86 Control switching means

Claims (6)

A winding bobbin rotation drive motor for rotationally driving a winding bobbin for winding the yarn, and a traverse device for traversing the yarn when winding the yarn on the winding bobbin,
The traverse device is
A traverse guide for traversing the yarn by engaging with the yarn;
A traverse guide drive motor for driving the traverse guide to be driven separately from the winding bobbin rotation drive motor;
In a yarn winding method for winding a yarn around the winding bobbin while maintaining a single wind number from the winding start of the yarn to the winding bobbin to the end of winding using the yarn winding device having
Until the diameter of the winding bobbin reaches a predetermined diameter, the rotational speed of the winding bobbin rotational drive motor is adjusted so that the rotational speed of the traverse guide drive motor is equal to or lower than the limit rotational speed,
After the diameter of the winding bobbin reaches a predetermined diameter, the rotational speed of the winding bobbin rotation drive motor is adjusted so that the thread winding speed becomes a required thread winding speed. How to take. The yarn winding method according to claim 1,
A yarn winding method, wherein the traverse guide is reciprocated by forward and reverse rotation of a motor shaft of the traverse guide drive motor. A winding bobbin rotation drive motor for rotationally driving a winding bobbin for winding the yarn, and a traverse device for traversing the yarn when winding the yarn on the winding bobbin,
The traverse device is
A traverse guide for traversing the yarn by engaging with the yarn;
A traverse guide drive motor for driving the traverse guide to be driven separately from the winding bobbin rotation drive motor;
Have
And in the yarn winding device comprising a control device for controlling the winding bobbin rotation driving motor and the traverse guide driving motor,
The controller is
Relational expression storage means for storing a relational expression between the rotation speed of the winding bobbin rotation drive motor and the rotation speed of the traverse guide drive motor;
Limit rotation speed storage means for storing the limit rotation speed of the traverse guide drive motor;
While maintaining the relationship of the relational expression stored in the relational expression storage means, the rotation speed of the traverse guide drive motor is equal to or lower than the limit rotation speed of the traverse guide drive motor stored in the limit rotation speed storage means. Limit rotational speed reference control means for controlling the rotational speed of the traverse guide drive motor and the rotational speed of the winding bobbin rotational drive motor;
A yarn winding device comprising: The yarn winding device according to claim 3,
The yarn winding device, wherein the traverse device is configured to reciprocate the traverse guide by forward and reverse rotation of a motor shaft of the traverse guide drive motor. The yarn winding device according to claim 3 or 4,
The controller is
Requested yarn winding speed storage means for storing a required value of the yarn winding speed;
While maintaining the relationship of the relational expression stored in the relational expression storage means, the rotational speed of the traverse guide drive motor and the speed so that the yarn winding speed becomes the required yarn winding speed stored in the required yarn winding speed storage means. A yarn winding speed reference control means for controlling the rotational speed of the winding bobbin rotation drive motor;
It is possible to set the yarn winding speed to the required yarn winding speed stored in the required yarn winding speed storage means and to set the rotation speed of the traverse guide drive motor to be equal to or lower than the limit rotation speed stored in the limit rotation speed storage means. Control switching means for switching the rotational speed of the traverse guide drive motor and the rotational speed of the winding bobbin rotational drive motor from the limit rotational speed reference control means to the yarn winding speed reference control means when
A yarn winding device comprising: The yarn winding device according to claim 5,
A winding bobbin diameter detecting means for detecting the diameter of the winding bobbin;
The relational expression stored in the relational expression storage means is an expression for maintaining a single wind number from the start of winding of the yarn to the winding bobbin until the end of winding.
In the control switching means, the yarn winding speed is set to the required yarn winding speed stored in the required yarn winding speed storage means, and the rotational speed of the traverse guide drive motor is equal to or less than the limit rotational speed stored in the limit rotational speed storage means. The condition that can be made is that the winding bobbin diameter exceeds a predetermined diameter,
The control switching means switches from the limit rotational speed reference control means to the yarn winding speed reference control means when the winding bobbin diameter detected by the winding bobbin diameter detection means exceeds the predetermined diameter. A yarn winding device.

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