EP3363756A1 - Yarn winder - Google Patents
Yarn winder Download PDFInfo
- Publication number
- EP3363756A1 EP3363756A1 EP18155075.7A EP18155075A EP3363756A1 EP 3363756 A1 EP3363756 A1 EP 3363756A1 EP 18155075 A EP18155075 A EP 18155075A EP 3363756 A1 EP3363756 A1 EP 3363756A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dancer
- yarn
- yarns
- controller
- traverse
- 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.)
- Granted
Links
- 241000549194 Euonymus europaeus Species 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims description 89
- 230000003247 decreasing effect Effects 0.000 claims description 15
- 230000007423 decrease Effects 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
- B65H54/10—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers for making packages of specified shapes or on specified types of bobbins, tubes, cores, or formers
- B65H54/20—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers for making packages of specified shapes or on specified types of bobbins, tubes, cores, or formers forming multiple packages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
- B65H54/28—Traversing devices; Package-shaping arrangements
- B65H54/2884—Microprocessor-controlled traversing devices in so far the control is not special to one of the traversing devices of groups B65H54/2803 - B65H54/325 or group B65H54/38
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
- B65H59/36—Floating elements compensating for irregularities in supply or take-up of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
- B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
- B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
- B65H59/385—Regulating winding speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
- B65H67/04—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements
- B65H67/044—Continuous winding apparatus for winding on two or more winding heads in succession
- B65H67/048—Continuous winding apparatus for winding on two or more winding heads in succession having winding heads arranged on rotary capstan head
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- the present invention relates to a yarn winder including dancer rolls configured to reduce the tension fluctuation of yarns.
- Patent Literature 1 Japanese Unexamined Patent Publication No. H11-301930 discloses providing dancer rolls. Onto each dancer roll, a yarn is wound.
- Each dancer roll is configured so that: when the yarn length is short, the dancer roll moves to a relaxation side on which the yarn is relaxed; and when the yarn length is long, the dancer roll moves to a tension side on which the slack of the yarn is removed.
- the dancer roll is configured to move to the relaxation side or to the tension side as needed depending on the yarn length, and this makes it possible to reduce or minimize the tension fluctuation.
- control of returning the dancer roll to a predetermined reference position is performed by adjusting the rotation number of the spindle supporting packages, that is, by adjusting the winding speed of the yarns.
- a plurality of dancer rolls are provided respectively for a plurality of yarns.
- the position of each dancer roll changes depending on the length of the corresponding yarn, and there may be large differences among the positions of the dancer rolls. If, under this situation, the rotation number of the spindle is adjusted so as to return the position of one of the dancer rolls to the reference position, all the dancer rolls corresponding to this spindle uniformly move to the relaxation side or to the tension side. As a result, even though the one of the dancer rolls is returned back to the reference position, there is a possibility that one or more other dancer rolls reach the limit position.
- Patent Literature 1 describes such a multiple-package-per-spindle yarn winder, the above problem is not mentioned at all.
- An object of the present invention is to properly control the positions of dancer rolls in a yarn winder including one or more common spindles each configured to support a plurality of bobbins (packages).
- a yarn winder including at least one common spindle each configured to support a plurality of bobbins, the yarn winder configured to rotate the spindle to wind yarns onto the bobbins respectively to form packages, includes: traverse units configured to traverse the yarns respectively; dancer rolls onto which the yarns are respectively wound, each of the dancer rolls configured to be movable from a predetermined reference position toward a relaxation side on which a corresponding one of the yarns is relaxed and toward a tension side on which yarn slack is removed; position detectors configured to detect positions of the dancer rolls, respectively; and a controller configured to control a position of at least one of the dancer rolls based on outputs from the position detectors by adjusting traversal speed of corresponding at least one of the traverse units traversing the yarn wound onto the at least one of the dancer rolls .
- the traverse units are respectively provided for the yarns.
- the position of a desired one of the dancer rolls is controllable by adjusting the traversal speed of the traverse unit traversing the yarn wound onto the desired one of the dancer rolls.
- the position of each dancer roll is controllable by adjusting the traversal speed of the corresponding traverse unit. This makes it possible to control the positions of the dancer rolls individually, and therefore to properly control the position of each dancer roll.
- the controller when a difference between positions of freely-selected two of the dancer rolls exceeds a predetermined threshold, the controller performs positional difference eliminating control of reducing the difference between the positions of the two dancer rolls to a level equal to or smaller than the threshold by adjusting the traversal speed of at least one of two traverse units traversing the yarns wound onto the two dancer rolls.
- the controller is configured to decrease the traversal speed of a corresponding one of the two traverse units which traverses the yarn wound onto a relaxation-side dancer roll of the two dancer rolls, the relaxation-side dancer roll being on the relaxation side relatively to the other dancer roll.
- a yarn slip may occur as a result of increasing the traversal speed.
- the position of the dancer roll is controlled by decreasing the traversal speed as above, and therefore the yarn slip is avoidable.
- the controller is configured to perform processing of the positional difference eliminating control within a time period of a single reciprocation cycle in which the traverse unit reciprocates the yarn once in a traverse direction.
- the at least one spindle includes two spindles
- the yarn winder further includes: a switching device configured to support the two spindles so that positions of the two spindles are interchangeable with each other between a winding position at which the yarns are respectively wound onto the bobbins and a collection position at which the packages are collected; and a plurality of cutting means configured to respectively cut the yarns leading to the packages supported by the spindle having been moved from the winding position to the collection position by the switching device, wherein the controller is configured to perform the positional difference eliminating control immediately before interchanging the positions of the two spindles by the switching device, irrespective of whether or not the difference between the positions of the two dancer rolls exceeds the threshold.
- the controller is configured to perform the positional difference eliminating control immediately after the yarns are cut by the plurality of cutting means, irrespective of whether or not the difference between the positions of the two dancer rolls exceeds the threshold.
- each dancer roll is controllable by adjusting the traversal speed of the corresponding traverse unit, it is preferable that the traversal speed is as constant as possible in order to improve the quality of the packages.
- the traversal speed is as constant as possible in order to improve the quality of the packages.
- the controller is capable of changing traverse widths of the traverse units.
- the above arrangement in which the traverse width of each traverse unit is changeable makes it possible to keep its winding width constant by adjusting the traverse width depending on the change of the traversal speed.
- the controller when decreasing the traversal speeds of one or more of the traverse units, the controller is configured to decrease the traverse widths of the one or more traverse units.
- the slip of a yarn is avoidable by decreasing the traversal speed to control the position of the corresponding dancer roll.
- the decrease of the traversal speed makes the winding width longer, which may lead to cob-webbing.
- the traverse width is decreased at the same time when the traversal speed is decreased. This makes it possible to maintain the winding width constant while avoiding the slip of the yarn.
- the controller is configured to perform winding speed control of moving the positions of the dancer rolls by adjusting a rotation number of the spindle.
- Performing the winding speed control makes it possible to control the positions of the dancer rolls not only by adjusting the traversal speed, but also by adjusting the rotation number of the spindle.
- the controller is configured to adjust the rotation number of the spindle so that one of the dancer rolls is moved to the reference position.
- the controller is configured to adjust the rotation number of the spindle so that out of the dancer rolls, the dancer roll positioned farthest on the tension side from the reference position is moved to the reference position.
- the other dancer roll(s) is/are positioned on the relaxation side relatively to the reference position.
- the traversal speed shall be decreased. Accordingly, the slip of the yarn is avoidable, as described above.
- FIG. 1 is a schematic diagram of a yarn winder of the present embodiment.
- a yarn winder 1 is configured to wind yarns Y produced in a yarn production apparatus 100 onto bobbins B, to form packages P.
- the yarn winder 1 is configured to wind two yarns Y onto two bobbins B to form two packages P.
- the yarn winder 1 includes: first rollers 11, dancer roll mechanisms 12, second rollers 13, fulcrum rollers 14, and a winding device 15, in this order from an upstream side in a yarn running direction.
- first roller 11, the dancer roll mechanism 12, the second roller 13, and the fulcrum roller 14 are provided for each of the yarn paths of the two yarns Y.
- the winding device 15 is provided to be shared by the two yarns Y.
- Each dancer roll mechanism 12 includes a dancer roll 31, which is provided between the corresponding first and second rollers 11 and 13.
- Each yarn Y is wound around upper portions of the corresponding first and second rollers 11 and 13, and is wound around a lower portion of the corresponding dancer roll 31. Due to this, the yarn path extending from the first roller 11 to the second roller 13 via the dancer roll 31 has a V-shape.
- the dancer roll mechanisms 12 will be detailed later.
- the fulcrum rollers 14 are fixed, and function as fulcrums when the yarns Y are traversed in the winding device 15.
- the fulcrum rollers 14 may be omitted when the second rollers 13 are used to function as the fulcrum rollers 14.
- the winding device 15 includes a base 16, a turret 17, spindles 18, traverse units 19, a controller 20, and the like.
- the turret 17 has a disc-like shape and is attached to the base 16.
- the turret 17 is rotated and driven by a turret motor 21.
- the two long cylindrical spindles 18 cantilever from the turret 17.
- the spindles 18 are rotated and driven by their respective spindle motors 22.
- Two bobbins B are attached to each spindle 18 so as to be aligned in the axial direction of the spindle 18.
- the operations of the turret motor 21 and the spindle motors 22 are controlled by the controller 20.
- the positions of the two spindles 18 are interchangeable with each other between a winding position L1 and a collection position L2, by rotating the turret 17 by the turret motor 21 about a central axis C which is parallel to the axial direction of the spindles 18.
- the yarns Y are wound onto the bobbins B attached to the spindle 18 at the winding position L1, so that packages P are formed.
- the positions of the two spindles 18 are interchanged with each other. After the spindle 18 supporting the full packages P moves to the collection position L2, the packages P are collected.
- Ring-shaped yarn holding portions 18a are fitted around each spindle 18 so as to be movable in the axial direction.
- Each yarn holding portion 18a is provided near a position where the corresponding bobbin B is attached.
- the yarn holding portion 18a is configured to hold the corresponding yarn Y between the yarn holding portion 18a and the bobbin B in the following manner: a gap is first created between the yarn holding portion 18a and the bobbin B by moving the yarn holding portion 18a away from the bobbin B, and then, as soon as the yarn Y enters the gap, the yarn holding portion 18a is moved toward the bobbin B so that the yarn Y is held between them.
- Cutters 23 are provided in the vicinity of the respective yarn holding portions 18a. Each cutter 23 is configured to cut the corresponding yarn Y leading to the full package P. The operations of the yarn holding portions 18a and the cutters 23 are controlled by the controller 20.
- FIG. 2 is a series of schematic diagrams illustrating the operation of interchanging the positions of the spindles 18.
- the two spindles 18 are viewed from the left side in FIG. 1 .
- each traverse unit 19 is attached to the base 16 via an unillustrated supporting member.
- the traverse units 19 are provided respectively for the two yarns Y.
- the traverse units 19 are controlled independently from each other by the controller 20.
- a traverse guide 19a provided to each traverse unit 19 is configured to reciprocate in the axial direction of the spindles 18, i.e., in a "traverse direction".
- the yarn Y is traversed about the corresponding fulcrum roller 14. While being traversed, the yarn Y is wound onto the corresponding bobbin B.
- each traverse unit 19 is formed by the combination of pulleys and a belt, however, the structure of the traverse unit 19 is not limited to this.
- the traverse unit may be formed by a ball screw and the like.
- the yarns Y intended herein to be wound by the yarn winder 1 are stiff yarns having an elastic modulus of 3 GPa or higher, such as carbon fiber yarns or aramid fiber yarns, for example.
- Nylon yarns which are typical synthetic fiber yarns, have a relatively low stiffness, and therefore even when the tension fluctuation of the yarns occurs, the tension fluctuation can be absorbed due to the flexibility of the yarns. To the contrary, the above-mentioned stiff yarns have little flexibility, and therefore the tension of the yarns may greatly fluctuate.
- the yarn winder 1 is provided with the dancer roll mechanisms 12, which make it possible to reduce or minimize the tension fluctuation of the yarns Y even when the yarns Y have high stiffness.
- the traversal speed is 35 m/min or lower, and the winding speed is 100 m/min or lower. That is, the yarn winder 1 is structured so that the yarns Y are wound at a relatively low speed.
- Each dancer roll mechanism 12 includes a dancer roll 31, a dancer arm 32, a shaft 33 and a position sensor 34. As described above, the dancer roll 31 is provided between the corresponding first roller 11 and second roller 13 with respect to the yarn running direction. The yarn path extending from the first roller 11 to the second roller 13 via the dancer roll 31 has a V-shape.
- the dancer roll 31 is rotatably supported at a leading end portion of the dancer arm 32. A base end portion of the dancer arm 32 is attached to the shaft 33 in a swingable manner, and this allows the dancer roll 31 to move in an up-down direction.
- Each dancer roll mechanism 12 is adjusted so that the dancer roll 31 is basically at a predetermined reference position.
- the reference position is indicated with solid lines in FIG. 1 .
- the dancer roll 31 moves in the up-down direction from the reference position, thereby to reduce or minimize the tension fluctuation.
- the dancer roll 31 moves toward an upper side (equivalent to a "relaxation side" in the present invention) to relax the yarn Y, with the result that the tension fluctuation of the yarn Y is reduced or minimized.
- the dancer roll 31 moves toward a lower side (equivalent to a "tension side" in the present invention) to eliminate the slack of the yarn Y, with the result that the tension fluctuation of the yarn Y is reduced or minimized.
- a lower side equivalent to a "tension side” in the present invention
- the dancer roll 31 is movable only between an upper limit position (position indicated with dashed lines in FIG. 1 ) and a lower limit position (position indicated with two-dot chain lines in FIG. 1 ).
- Each position sensor 34 is configured to detect the swing angle of the corresponding dancer arm 32.
- the swing angle indicates the position of the dancer roll 31.
- the controller 20 is configured to control the rotation number of the spindle 18 and the traversal speed and traverse width of each traverse unit 19, based on the output from each position sensor 34.
- the rotation number of the corresponding spindle 18 is adjusted to adjust the winding speed, so as to return the dancer roll 31 to the reference position.
- the plurality of bobbins B are supported by the common spindle 18. In such an arrangement, the above-described positional control of the dancer rolls 31 through adjusting the rotation number of the spindle 18 may meet with failure if there is a large difference between the positions of the dancer rolls 31.
- One of factors for causing a large difference between the positions of the two dancer rolls 31 is a difference between the production speeds of the two yarns Y.
- the yarns Y are produced by baking material precursors.
- a large difference between the production speeds of the two yarns Y may be caused by a difference between the degrees of shrinkage at the time of baking, a difference between the gripping forces of rollers feeding the yarns Y, and/or the like.
- the positional difference eliminating control of the present embodiment is particularly effective in such a case.
- FIG. 3 is a flowchart illustrating processing of the positional control of the dancer rolls 31.
- FIG. 4 is a flowchart illustrating processing of the winding speed control.
- FIG. 5 is a flowchart illustrating processing of the positional difference eliminating control. While the yarns Y are wound, the processing of the winding speed control (Step S10) and the processing of the positional difference eliminating control (Step S11) are performed at appropriate timings (for example, at predetermined time intervals). While in the present embodiment, the processing of the positional difference eliminating control is performed subsequently to the processing of the winding speed control, both the control processes may be performed simultaneously.
- directions with respect to the position of the dancer roll 31 are defined as follows: the direction toward the upper side (relaxation side) is a positive direction of a coordinate, and the direction toward the lower side (tension side) is a negative direction of the coordinate.
- the winding speed control is described with reference to FIG. 4 .
- the rotation number of the spindle 18 is adjusted so that the lower dancer roll 31, positioned lower than the other, is returned to a reference position PO.
- "A" is affixed to reference sings for elements related to one of the yarns Y
- "B” is affixed to reference signs for elements related to the other of the yarns Y, as needed.
- the controller 20 obtains positions PA and PB of the dancer rolls 31A and 31B, which are respectively detected by the position sensors 34A and 34B (Step S20). Then, the controller 20 determines whether the position PA of the dancer roll 31A is lower than the position PB of the dancer roll 31B (Step S21). When the position PA of the dancer roll 31A is lower than the position PB of the dancer roll 31B (Step S21: YES), the controller 20 determines whether the position PA of the dancer roll 31A is higher than the reference position PO (Step S22).
- Step S22 When the position PA of the dancer roll 31A is higher than the reference position PO (Step S22: YES), the controller 20 reduces the rotation number of the spindle 18 (Step S23), so as to lower the position PA of the dancer roll 31A to the reference position PO, and then the processing of the winding speed control ends.
- Step S22 when the position PA of the dancer roll 31A is not higher than the reference position PO (Step S22: NO), the controller 20 determines whether the position PA of the dancer roll 31A is lower than the reference position PO (Step S24). When the result of the above determination shows that the position PA of the dancer roll 31A is lower than the reference position PO (Step S24: YES), the controller 20 increases the rotation number of the spindle 18 (Step S25) so as to raise the position PA of the dancer roll 31A to the reference position PO, and then the processing of the winding speed control ends.
- Step S24 NO
- the processing of the winding speed control ends without changing the rotation number of the spindle 18.
- Step S21 determines whether the position PB of the dancer roll 31B is higher than the reference position PO (Step S26).
- Step S26 determines whether the position PB of the dancer roll 31B is higher than the reference position PO (Step S26).
- Step S27 decreased the rotation number of the spindle 18 (Step S27) so as to lower the position PB of the dancer roll 31B to the reference position PO, and then the processing of the winding speed control ends.
- Step S26 when the position PB of the dancer roll 31B is not higher than the reference position PO (Step S26: NO), the controller 20 determines whether the position PB of the dancer roll 31B is lower than the reference position PO (Step S28). When the result of the above determination shows that the position PB of the dancer roll 31B is lower than the reference position PO (Step S28: YES), the controller 20 increases the rotation number of the spindle 18 (Step S29) so as to raise the position PB of the dancer roll 31B to the reference position PO, and then the processing of the winding speed control ends.
- Step S28 NO
- the processing of the winding speed control ends without changing the rotation number of the spindle 18.
- the processing of the positional difference eliminating control is described with reference to FIG. 5 .
- the positional difference eliminating control of the present embodiment when there is a large difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B, the traversal speed of the traverse unit 19 traversing the yarn Y wound onto the dancer roll 31 higher than the other is adjusted so as to move only the higher dancer roll 31 to the reference position PO.
- the controller 20 obtains the positions PA and PB of the dancer rolls 31A and 31B, which are respectively detected by the position sensors 34A and 34B (Step S30). Then, the controller 20 determines whether the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B is within (equal to or smaller than) a predetermined threshold PX (Step S31). When the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B is equal to or smaller than the threshold PX (Step S31: YES), the processing of the positional difference eliminating control ends without changing the traversal speed of any of the traverse units 19A and 19B.
- Step S31 when the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B exceeds the threshold PX (Step S31: NO), the controller 20 determines whether the position PA of the dancer roll 31A is lower than the position PB of the dancer roll 31B (Step S32).
- Step S32 YES
- the controller 20 decreases the traversal speed of the traverse unit 19B for a predetermined period of time so as to lower the position PB of the dancer roll 31B, which is positioned higher, to the reference position PO (Step S33). Then, the controller 20 returns the traversal speed of the traverse unit 19B back to its original speed (Step S34), and the processing of the positional difference eliminating control ends.
- the controller 20 decreases the traversal speed of the traverse unit 19A for the predetermined period of time so as to lower the position PA of the dancer roll 31A, which is positioned higher, to the reference position PO (Step S35). Then, the controller 20 returns the traversal speed of the traverse unit 19A back to its original speed (Step S36), and the processing of the positional difference eliminating control ends.
- the above-mentioned "predetermined period of time" during which the traversal speed is adjusted in each Step S33, S35 may be freely set as needed.
- the predetermined period of time is equal to a time period of a single reciprocation cycle in which the traverse guide 19a reciprocates once in the traverse direction.
- the processing of the winding speed control is performed first. With this, both of the dancer rolls 31A and 31B move uniformly toward the upper or lower side so that the lower one of the dancer rolls 31A and 31B, which is positioned lower than the other, returns back to the reference position PO. In the processing of the positional difference eliminating control performed subsequently, only the upper dancer roll 31, which is positioned higher than the other, is moved to the reference position PO when there is a large difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B.
- Step S12 determines whether the formation of the packages P has been completed, that is, whether the packages P have become full, based on outputs from unillustrated sensors or the like.
- Step S12 NO
- the processing of the winding speed control and the processing of the positional difference eliminating control are repeated.
- Step S13 processing of forced positional difference eliminating control is performed.
- the forced positional difference eliminating control is the same as the positional difference eliminating control except that it is forcedly performed regardless of whether the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B exceeds the threshold PX. Specifically, in this processing, Step S31 is skipped in the flowchart of FIG. 5 , and Step S32 is performed after Step S30.
- Step S14 the turret 17 is rotated to interchange the positions of the two spindles 18 with each other, and then the yarn holding portions 18a are controlled so that the yarns Y are held by the respective bobbins B, and simultaneously with this, the yarns Y leading to the respective packages P are cut by the respective cutters 23 (Step S14). With this, winding of the yarns Y onto the respective empty bobbins B is started. Immediately after the start of the winding, the processing of the forced positional difference eliminating control is performed again (Step S15), and the series of steps are repeatedly performed from Step S10.
- the position of a desired one of the dancer rolls 31 is controllable by adjusting the traversal speed of the traverse unit (19A or 19B) traversing the yarn Y wound onto the desired one of the dancer rolls 31.
- the position PA, PB of each dancer roll 31A, 31B is individually controllable by adjusting the traversal speed of the corresponding traverse unit. This makes it possible to properly control the position PA, PB of the dancer roll 31A, 31B.
- the controller 20 when the difference between the positions PA and PB of the two dancer rolls 31A and 31B exceeds the predetermined threshold PX, the controller 20 performs the positional difference eliminating control of reducing the difference between the positions PA and PB of the two dancer rolls 31A and 31B to a level equal to or smaller than the threshold PX by adjusting the traversal speed of at least one of the two traverse units 19A and 19B traversing the yarns Y wound onto the two dancer rolls 31A and 31B.
- the difference is reduced by performing the positional difference eliminating control.
- the controller 20 is configured to decrease the traversal speed of the traverse unit 19 which traverses the yarn Y wound onto the upper dancer roll 31, which is positioned on the upper side (relaxation side) relatively to the other, out of the two dancer rolls 31A and 31B. This moves the upper dancer roll 31 to the lower side (tension side), and decreases the difference between the positions PA and PB the dancer rolls 31A and 31B. A slip of the yarn Y may occur as a result of increasing the traversal speed. However, the position of the dancer roll 31 is controlled by decreasing the traversal speed as above, and therefore the slip of the yarn Y is avoidable.
- the controller 20 is configured to perform processing of the positional difference eliminating control within the time period of a single reciprocation cycle in which the traverse unit 19 reciprocates the yarn Y once in the traverse direction.
- Long-term execution of the positional difference eliminating control, in which the traversal speed is changed, may misshape the package P.
- Performing the processing of the positional difference eliminating control only for the short period of time as described above ensures good quality of the packages P.
- the controller 20 is configured to perform the positional difference eliminating control irrespective of whether or not the difference of the positions PA and PB of the two dancer rolls 31A and 31B exceeds the threshold PX (the controller 20 is configured to perform the forced positional difference eliminating control) immediately before interchanging the positions of the two spindles 18 by the turret 17 (switching device).
- the controller 20 is configured to perform the forced positional difference eliminating control immediately before interchanging the positions of the two spindles 18 by the turret 17 (switching device).
- the controller 20 is configured to perform the positional difference eliminating control irrespective of whether or not the difference between the positions PA and PB of the two dancer rolls 31A and 31B exceeds the threshold PX (the controller 20 is configured to perform the forced positional difference eliminating control) immediately after the yarns Y are cut by the cutters 23 (cutting means).
- the position PA, PB of the dancer roll 31A, 31B is controllable by adjusting the traversal speed of the corresponding traverse unit, it is preferable that the traversal speed is as constant as possible in order to improve the quality of the packages P.
- FIG. 6 is a schematic diagram illustrating the change in the winding width with a change in the traversal speed.
- FIG. 6 shows a development view of a package P on a sheet.
- the traverse guide 19a reciprocates at a traversal speed V1 and a traverse width W1, and draws a trajectory S1, which is indicated with a dashed line.
- the yarn Y has a part which does not follow the traverse guide 19a at the time of turnaround of the traverse guide 19a, the part being so called "free length". Due to this, when the traverse guide 19a turns around, the wound yarn Y turns back at a point inward of the trajectory of the traverse guide 19a, as indicated with bold solid lines in FIG. 6 . That is to say, the actual winding width X1 is shorter than the traverse width W1. Taking the above phenomenon into consideration, the traversal speed V1 and the traverse width W1 are determined beforehand so that the winding width X1 is equal to a desired value.
- the trajectory of the traverse guide 19a changes to S2, as indicated with two-dot chain line.
- the decrease of the traversal speed makes it easier for the yarn Y to follow the traverse guide 19a at the time of turnaround of the traverse guide 19a, and therefore the winding width X2 in this situation is longer than the winding width X1 of the normal winding times.
- the winding width becomes shorter than the winding width X1 of the normal winding times, though it is not illustrated.
- the actual winding width changes with the change of the traversal speed. Accordingly, in the above-described arrangement in which the traverse width of each traverse unit 19 is changeable, it is possible to keep the winding width constant by adjusting the traverse width depending on the change of the traversal speed.
- the controller 20 decreases the traverse widths of the one or more traverse units 19.
- the slip of the yarn Y is avoidable by decreasing the traversal speed to control the position of the dancer roll 31.
- the decrease of the traversal speed makes the actual winding width longer, which may lead to cob-webbing.
- the traverse width is decreased to be shorter than W1 at the same time when the traversal speed is decreased. This makes it possible to maintain the winding width constant at X1, while avoiding the slip of the yarn Y.
- the controller 20 is configured to perform the winding speed control of moving the positions of the dancer rolls 31A and 31B by adjusting the rotation number of the spindle 18. Performing the winding speed control makes it possible to control the position of the dancer roll 31A, 31B not only by adjusting the traversal speed, but also by adjusting the rotation number of the spindle 18.
- the controller 20 is configured to adjust the rotation number of the spindle 18 so that one of the dancer rolls 31A and 31B moves to the reference position PO in the winding speed control.
- this winding speed control one of the dancer rolls (dancer roll 31A or 31B) is moved to the reference position PO. Due to this, merely by performing the positional difference eliminating control for the other of the dancer rolls (dancer roll 31B or 31A) so as to reduce the difference between the positions PA and PB of the dancer rolls 31A and 31B, it is possible to keep all the dancer rolls 31A and 31B at the reference position PO.
- the controller 20 adjusts, in the winding speed control, the rotation number of the spindle 18 so that the lowest one of the dancer rolls 31A and 31B moves to the reference position PO.
- the winding speed control is performed so that the lowest one of the dancer rolls (dancer roll 31A or 31B) moves to the reference position PO
- the other one of the dancer rolls (dancer roll 31B or 31A) shall be positioned higher than the reference position PO.
- the traversal speed shall be decreased. Accordingly, the slip of the yarn Y is avoidable, as described above.
- the specific contents of the control are not limited to those described in the above embodiment.
- one of the dancer rolls 31 which has been selected beforehand may be moved to the reference position PO, or the rotation number of the spindle 18 may be adjusted so that the average position of the plurality of dancer rolls 31 is level with the reference position PO.
- the dancer roll(s) 31 to be moved is changeable as needed, and two or more dancer rolls 31 may be moved at the same time, that is, the traversal speeds of two or more traverse units 19 may be changed at the same time.
- the winding speed control and the positional difference eliminating control in another embodiment are described with reference to FIG. 7 and FIG. 8 .
- the rotation number of the spindle 18 is adjusted so that the dancer roll 31A is returned to the reference position PO.
- the controller 20 obtains the position PA of the dancer roll 31A, which is detected by the position sensor 34A (Step S40). Then, the controller 20 determines whether the position PA of the dancer roll 31A is higher than the reference position PO (Step S41).
- Step S41 When the position PA of the dancer roll 31A is higher than the position PO (Step S41: YES), the controller 20 reduces the rotation number of the spindle 18 so as to lower the position PA of the dancer roll 31A to the reference position PO (Step S42), and the processing of the winding speed control ends.
- Step S41 the controller 20 determines whether the position PA of the dancer roll 31A is lower than the reference position PO (Step S43).
- Step S43 When the result of the above determination shows that the position PA of the dancer roll 31A is lower than the reference position PO (Step S43: YES), the controller 20 increases the rotation number of the spindle 18 so as to raise the position PA of the dancer roll 31A to the reference position PO (Step S44), and the processing of the winding speed control ends.
- Step S43 NO
- the result shows that the position PA of the dancer roll 31A is level with the reference position PO, and therefore the processing of the winding speed control ends without changing the rotation number of the spindle 18.
- the controller 20 obtains the positions PA and PB of the dancer rolls 31A and 31B, which are respectively detected by the position sensors 34A and 34B (Step S50). Then, the controller 20 determines whether the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B is within (equal to or smaller than) a predetermined threshold PX (Step S51).
- Step S51 YES
- the processing of the positional difference eliminating control ends without changing the traversal speed of any of the traverse units 19A and 19B.
- Step S51 when the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B exceeds the threshold PX (Step S51: NO), the controller 20 determines whether the position PB of the dancer roll 31B is higher than the reference position PO (Step S52). When the result of the above determination shows that the position PB of the dancer roll 31B is higher than the reference position PO (Step S52: YES), the controller 20 decreases the traversal speed of the traverse unit 19B for a predetermined period of time so as to lower the position PB of the dancer roll 31B to the reference position PO (Step S53).
- Step S54 the controller 20 returns the traversal speed of the traverse unit 19B back to its original speed (Step S54), and the processing of the positional difference eliminating control ends.
- Step S52 the controller 20 increases the traversal speed of the traverse unit 19B for a predetermined period of time so as to raise the position PB of the dancer roll 31B to the reference position PO (Step S55).
- Step S56 the controller 20 returns the traversal speed of the traverse unit 19B back to its original speed (Step S56), and the processing of the positional difference eliminating control ends.
- the positional control of the dancer rolls 31 of the other embodiment is arranged such that: the winding speed control is made so as to move the dancer roll 31A to the reference position PO; and the positional difference eliminating control is made so as to move the dancer roll 31B to the reference position PO. That is, the dancer roll to be controlled is fixed in each control processing, and this simplifies the positional control.
- the yarn winder 1 is configured so that each common spindle 18 supports two bobbins (packages P). In this regard, however, three or more bobbins B (packages P) may be supported by one spindle 18.
- the reference position PO of the dancer rolls 31 is defined as a predetermined position
- the reference position PO may be defined as a predetermined range.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Winding Filamentary Materials (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
Description
- The present invention relates to a yarn winder including dancer rolls configured to reduce the tension fluctuation of yarns.
- When yarns having high stiffness (stiff yarns) are wound in a yarn winder, the tension of the yarns tends to fluctuate. This is because, when the length of the yarns changes due to, for example, a change in the production speed of the yarns or the operation of traversing the yarns, the change of the yarn length is less likely to be absorbed due to the low flexibility of the yarns. To reduce or minimize such tension fluctuation, Patent Literature 1 (Japanese Unexamined Patent Publication No.
H11-301930 - If the yarn length greatly changes in the above configuration, there is a possibility that the dancer roll reaches its limit position on the relaxation side or on the tension side. In this case, the tension fluctuation cannot be reduced any more. In such a case, control of returning the dancer roll to a predetermined reference position is performed by adjusting the rotation number of the spindle supporting packages, that is, by adjusting the winding speed of the yarns.
- In a single-package-per-spindle yarn winder, in which only one package is formed per spindle, it is possible to return a dancer roll to the reference position as needed by adjusting the rotation number of the corresponding spindle as described above, and this allows the tension fluctuation to be reduced or minimized continuously. However, in a multiple-package-per-spindle yarn winder including one or more common spindles each configured to support a plurality of packages, the above control of adjusting the rotation number of the spindle may meet with failure. Now, the following describes this regard in detail.
- In the multiple-package-per-spindle yarn winder, a plurality of dancer rolls are provided respectively for a plurality of yarns. In this yarn winder, the position of each dancer roll changes depending on the length of the corresponding yarn, and there may be large differences among the positions of the dancer rolls. If, under this situation, the rotation number of the spindle is adjusted so as to return the position of one of the dancer rolls to the reference position, all the dancer rolls corresponding to this spindle uniformly move to the relaxation side or to the tension side. As a result, even though the one of the dancer rolls is returned back to the reference position, there is a possibility that one or more other dancer rolls reach the limit position. Although
Patent Literature 1 describes such a multiple-package-per-spindle yarn winder, the above problem is not mentioned at all. - The present invention has been made in view of the above-described problem. An object of the present invention is to properly control the positions of dancer rolls in a yarn winder including one or more common spindles each configured to support a plurality of bobbins (packages).
- According to an aspect of the present invention, a yarn winder including at least one common spindle each configured to support a plurality of bobbins, the yarn winder configured to rotate the spindle to wind yarns onto the bobbins respectively to form packages, includes: traverse units configured to traverse the yarns respectively; dancer rolls onto which the yarns are respectively wound, each of the dancer rolls configured to be movable from a predetermined reference position toward a relaxation side on which a corresponding one of the yarns is relaxed and toward a tension side on which yarn slack is removed; position detectors configured to detect positions of the dancer rolls, respectively; and a controller configured to control a position of at least one of the dancer rolls based on outputs from the position detectors by adjusting traversal speed of corresponding at least one of the traverse units traversing the yarn wound onto the at least one of the dancer rolls .
- In the above aspect of the present invention, the traverse units are respectively provided for the yarns. The position of a desired one of the dancer rolls is controllable by adjusting the traversal speed of the traverse unit traversing the yarn wound onto the desired one of the dancer rolls. Thus, the position of each dancer roll is controllable by adjusting the traversal speed of the corresponding traverse unit. This makes it possible to control the positions of the dancer rolls individually, and therefore to properly control the position of each dancer roll.
- Furthermore, in the above aspect of the present invention, it is preferable that when a difference between positions of freely-selected two of the dancer rolls exceeds a predetermined threshold, the controller performs positional difference eliminating control of reducing the difference between the positions of the two dancer rolls to a level equal to or smaller than the threshold by adjusting the traversal speed of at least one of two traverse units traversing the yarns wound onto the two dancer rolls.
- When there is a large difference between the positions of the dancer rolls, the difference is reduced by performing the positional difference eliminating control.
- Furthermore, in the above aspect of the present invention, it is preferable that in the positional difference eliminating control, the controller is configured to decrease the traversal speed of a corresponding one of the two traverse units which traverses the yarn wound onto a relaxation-side dancer roll of the two dancer rolls, the relaxation-side dancer roll being on the relaxation side relatively to the other dancer roll.
- This moves the relaxation-side dancer roll to the tension side, and decreases the difference between the positions of the dancer rolls. A yarn slip may occur as a result of increasing the traversal speed. However, the position of the dancer roll is controlled by decreasing the traversal speed as above, and therefore the yarn slip is avoidable.
- Furthermore, in the above aspect of the present invention, it is preferable that the controller is configured to perform processing of the positional difference eliminating control within a time period of a single reciprocation cycle in which the traverse unit reciprocates the yarn once in a traverse direction.
- Long-term execution of the positional difference eliminating control, in which the traversal speed is changed, may misshape the package. Performing the processing of the positional difference eliminating control only for the short period of time as described above ensures good quality of the packages.
- Furthermore, in the above aspect of the present invention, the at least one spindle includes two spindles, and it is preferable that the yarn winder further includes: a switching device configured to support the two spindles so that positions of the two spindles are interchangeable with each other between a winding position at which the yarns are respectively wound onto the bobbins and a collection position at which the packages are collected; and a plurality of cutting means configured to respectively cut the yarns leading to the packages supported by the spindle having been moved from the winding position to the collection position by the switching device, wherein the controller is configured to perform the positional difference eliminating control immediately before interchanging the positions of the two spindles by the switching device, irrespective of whether or not the difference between the positions of the two dancer rolls exceeds the threshold.
- When there is a large difference between the positions of the dancer rolls at the time of cutting the yarns, there is a possibility that variations in the timings of cutting the yarns occur and/or one or some of the yarns cannot be cut. Forcedly performing the positional difference eliminating control immediately before the interchanging the positions of the spindles as above enables cutting the yarns simultaneously.
- Furthermore, in the above aspect of the present invention, it is preferable that the controller is configured to perform the positional difference eliminating control immediately after the yarns are cut by the plurality of cutting means, irrespective of whether or not the difference between the positions of the two dancer rolls exceeds the threshold.
- Although in the present invention, the position of each dancer roll is controllable by adjusting the traversal speed of the corresponding traverse unit, it is preferable that the traversal speed is as constant as possible in order to improve the quality of the packages. Thus, forcedly performing the positional difference eliminating control immediately after cutting the yarns as described above, i.e., at the time of starting the winding of the yarns onto empty bobbins, minimizes the necessity to change the traversal speed during the winding process.
- Furthermore, in the above aspect of the present invention, it is preferable that the controller is capable of changing traverse widths of the traverse units.
- When the traversal speed of a yarn is changed, the actual winding width of the yarn may change, which will be described later. Thus, the above arrangement in which the traverse width of each traverse unit is changeable makes it possible to keep its winding width constant by adjusting the traverse width depending on the change of the traversal speed.
- Furthermore, in the above aspect of the present invention, it is preferable that when decreasing the traversal speeds of one or more of the traverse units, the controller is configured to decrease the traverse widths of the one or more traverse units.
- As described above, the slip of a yarn is avoidable by decreasing the traversal speed to control the position of the corresponding dancer roll. However, the decrease of the traversal speed makes the winding width longer, which may lead to cob-webbing. To deal with this, the traverse width is decreased at the same time when the traversal speed is decreased. This makes it possible to maintain the winding width constant while avoiding the slip of the yarn.
- Furthermore, in the above aspect of the present invention, it is preferable that the controller is configured to perform winding speed control of moving the positions of the dancer rolls by adjusting a rotation number of the spindle.
- Performing the winding speed control makes it possible to control the positions of the dancer rolls not only by adjusting the traversal speed, but also by adjusting the rotation number of the spindle.
- Furthermore, in the above aspect of the present invention, it is preferable that in the winding speed control, the controller is configured to adjust the rotation number of the spindle so that one of the dancer rolls is moved to the reference position.
- With this winding speed control, one of the dancer rolls is moved to the reference position. Due to this, merely by performing the positional difference eliminating control for the other dancer roll(s) so as to reduce the difference from the one of the dancer rolls, it is possible to keep all the dancer rolls at the reference position.
- Furthermore, in the above aspect of the present invention, it is preferable that in the winding speed control, the controller is configured to adjust the rotation number of the spindle so that out of the dancer rolls, the dancer roll positioned farthest on the tension side from the reference position is moved to the reference position.
- As a result of performing the winding speed control as above so as to move the farthest dancer roll on the tension side to the reference position, the other dancer roll(s) is/are positioned on the relaxation side relatively to the reference position. When performing the positional difference eliminating control to the each of the other dancer rolls so as to reduce the difference in position from the one of the dancer rolls, the traversal speed shall be decreased. Accordingly, the slip of the yarn is avoidable, as described above.
-
-
FIG. 1 is a schematic diagram of a yarn winder of a present embodiment. -
FIG. 2 is a series of schematic diagrams illustrating the operation of interchanging the positions of spindles. -
FIG. 3 is a flowchart illustrating processing of positional control of dancer rolls. -
FIG. 4 is a flowchart illustrating processing of winding speed control. -
FIG. 5 is a flowchart illustrating processing of positional difference eliminating control. -
FIG. 6 is a schematic diagram illustrating a change in winding width with a change in traversal speed. -
FIG. 7 is a flowchart illustrating processing of winding speed control in another embodiment. -
FIG. 8 is a flowchart illustrating processing of positional difference eliminating control in the other embodiment. - The following will describe an example of embodiments of a yarn winder of the present invention.
FIG. 1 is a schematic diagram of a yarn winder of the present embodiment. Ayarn winder 1 is configured to wind yarns Y produced in ayarn production apparatus 100 onto bobbins B, to form packages P. In the present embodiment, theyarn winder 1 is configured to wind two yarns Y onto two bobbins B to form two packages P. - As shown in
FIG. 1 , theyarn winder 1 includes:first rollers 11,dancer roll mechanisms 12,second rollers 13,fulcrum rollers 14, and a windingdevice 15, in this order from an upstream side in a yarn running direction. Of these, thefirst roller 11, thedancer roll mechanism 12, thesecond roller 13, and thefulcrum roller 14 are provided for each of the yarn paths of the two yarns Y. The windingdevice 15 is provided to be shared by the two yarns Y. - The
first rollers 11 and thesecond rollers 13 are fixed. Eachdancer roll mechanism 12 includes adancer roll 31, which is provided between the corresponding first andsecond rollers second rollers corresponding dancer roll 31. Due to this, the yarn path extending from thefirst roller 11 to thesecond roller 13 via thedancer roll 31 has a V-shape. Thedancer roll mechanisms 12 will be detailed later. Thefulcrum rollers 14 are fixed, and function as fulcrums when the yarns Y are traversed in the windingdevice 15. Thefulcrum rollers 14 may be omitted when thesecond rollers 13 are used to function as thefulcrum rollers 14. - The winding
device 15 includes abase 16, aturret 17,spindles 18, traverseunits 19, acontroller 20, and the like. Theturret 17 has a disc-like shape and is attached to thebase 16. Theturret 17 is rotated and driven by aturret motor 21. The two longcylindrical spindles 18 cantilever from theturret 17. Thespindles 18 are rotated and driven by theirrespective spindle motors 22. Two bobbins B are attached to eachspindle 18 so as to be aligned in the axial direction of thespindle 18. The operations of theturret motor 21 and thespindle motors 22 are controlled by thecontroller 20. - The positions of the two
spindles 18 are interchangeable with each other between a winding position L1 and a collection position L2, by rotating theturret 17 by theturret motor 21 about a central axis C which is parallel to the axial direction of thespindles 18. In a winding process of the yarns Y, the yarns Y are wound onto the bobbins B attached to thespindle 18 at the winding position L1, so that packages P are formed. When the packages P become full, the positions of the twospindles 18 are interchanged with each other. After thespindle 18 supporting the full packages P moves to the collection position L2, the packages P are collected. - Ring-shaped
yarn holding portions 18a are fitted around eachspindle 18 so as to be movable in the axial direction. Eachyarn holding portion 18a is provided near a position where the corresponding bobbin B is attached. Theyarn holding portion 18a is configured to hold the corresponding yarn Y between theyarn holding portion 18a and the bobbin B in the following manner: a gap is first created between theyarn holding portion 18a and the bobbin B by moving theyarn holding portion 18a away from the bobbin B, and then, as soon as the yarn Y enters the gap, theyarn holding portion 18a is moved toward the bobbin B so that the yarn Y is held between them.Cutters 23 are provided in the vicinity of the respectiveyarn holding portions 18a. Eachcutter 23 is configured to cut the corresponding yarn Y leading to the full package P. The operations of theyarn holding portions 18a and thecutters 23 are controlled by thecontroller 20. - Now, a description is given to the operation of starting the winding process of the yarns Y onto the bobbins B attached to the
spindle 18 having just moved to the winding position L1 as a result of interchanging the positions of the twospindles 18.FIG. 2 is a series of schematic diagrams illustrating the operation of interchanging the positions of thespindles 18. InFIG. 2 , the twospindles 18 are viewed from the left side inFIG. 1 . - When each package P supported by the
spindle 18 at the winding position L1 becomes full as shown inFIG. 2(a) , theturret 17 is rotated 180 degrees in a counterclockwise direction inFIG. 2 , so that the positions of the twospindles 18 are interchanged with each other as shown inFIG. 2(b) . In the state ofFIG. 2(b) , each yarn Y still leads to the corresponding package P, and the yarn Y is in contact with the outer circumferential surface of the corresponding bobbin B attached to thespindle 18 which has just come to the winding position L1. Then, substantially at the same time when eachyarn holding portion 18a provided to thespindle 18 at the winding position L1 is actuated to hold the corresponding yarn Y, the yarn Y is cut by the correspondingcutter 23, at a point between a portion held by theyarn holding portion 18a and the package P. Consequently, as shown inFIG. 2(c) , the yarn Y is handed over from the package P at the collection position L2 to the empty bobbin B at the winding position L1, and then winding of the yarn Y onto the empty bobbin B is started. - Returning back to
FIG. 1 , eachtraverse unit 19 is attached to thebase 16 via an unillustrated supporting member. Thetraverse units 19 are provided respectively for the two yarns Y. Thetraverse units 19 are controlled independently from each other by thecontroller 20. Atraverse guide 19a provided to eachtraverse unit 19 is configured to reciprocate in the axial direction of thespindles 18, i.e., in a "traverse direction". As eachtraverse guide 19a to which the corresponding yarn Y is threaded reciprocates in the traverse direction, the yarn Y is traversed about thecorresponding fulcrum roller 14. While being traversed, the yarn Y is wound onto the corresponding bobbin B. In the example ofFIG. 1 , eachtraverse unit 19 is formed by the combination of pulleys and a belt, however, the structure of thetraverse unit 19 is not limited to this. For example, the traverse unit may be formed by a ball screw and the like. - The yarns Y intended herein to be wound by the
yarn winder 1 are stiff yarns having an elastic modulus of 3 GPa or higher, such as carbon fiber yarns or aramid fiber yarns, for example. Nylon yarns, which are typical synthetic fiber yarns, have a relatively low stiffness, and therefore even when the tension fluctuation of the yarns occurs, the tension fluctuation can be absorbed due to the flexibility of the yarns. To the contrary, the above-mentioned stiff yarns have little flexibility, and therefore the tension of the yarns may greatly fluctuate. To deal with this, theyarn winder 1 is provided with thedancer roll mechanisms 12, which make it possible to reduce or minimize the tension fluctuation of the yarns Y even when the yarns Y have high stiffness. In theyarn winder 1, the traversal speed is 35 m/min or lower, and the winding speed is 100 m/min or lower. That is, theyarn winder 1 is structured so that the yarns Y are wound at a relatively low speed. - Each
dancer roll mechanism 12 includes adancer roll 31, adancer arm 32, ashaft 33 and aposition sensor 34. As described above, thedancer roll 31 is provided between the correspondingfirst roller 11 andsecond roller 13 with respect to the yarn running direction. The yarn path extending from thefirst roller 11 to thesecond roller 13 via thedancer roll 31 has a V-shape. Thedancer roll 31 is rotatably supported at a leading end portion of thedancer arm 32. A base end portion of thedancer arm 32 is attached to theshaft 33 in a swingable manner, and this allows thedancer roll 31 to move in an up-down direction. - Each
dancer roll mechanism 12 is adjusted so that thedancer roll 31 is basically at a predetermined reference position. The reference position is indicated with solid lines inFIG. 1 . When the tension of the yarn Y fluctuates due to a change in the length of the yarn Y, for example, thedancer roll 31 moves in the up-down direction from the reference position, thereby to reduce or minimize the tension fluctuation. Specifically, when the length of the portion of the yarn Y between theyarn production apparatus 100 and the windingdevice 15 becomes shorter, thedancer roll 31 moves toward an upper side (equivalent to a "relaxation side" in the present invention) to relax the yarn Y, with the result that the tension fluctuation of the yarn Y is reduced or minimized. Meanwhile, when the length of the portion of the yarn Y between theyarn production apparatus 100 and the windingdevice 15 becomes longer, thedancer roll 31 moves toward a lower side (equivalent to a "tension side" in the present invention) to eliminate the slack of the yarn Y, with the result that the tension fluctuation of the yarn Y is reduced or minimized. However, there is a limitation to the range of the movement of thedancer roll 31 in the up-down direction. Thedancer roll 31 is movable only between an upper limit position (position indicated with dashed lines inFIG. 1 ) and a lower limit position (position indicated with two-dot chain lines inFIG. 1 ). - Each
position sensor 34 is configured to detect the swing angle of thecorresponding dancer arm 32. The swing angle indicates the position of thedancer roll 31. Thecontroller 20 is configured to control the rotation number of thespindle 18 and the traversal speed and traverse width of eachtraverse unit 19, based on the output from eachposition sensor 34. - Conventionally, when the length of a part of a yarn Y between the
yarn production apparatus 100 and the windingdevice 15 greatly changes and therefore thecorresponding dancer roll 31 reaches its upper limit position or lower limit position, the rotation number of the correspondingspindle 18 is adjusted to adjust the winding speed, so as to return thedancer roll 31 to the reference position. Now, in the present embodiment, the plurality of bobbins B are supported by thecommon spindle 18. In such an arrangement, the above-described positional control of the dancer rolls 31 through adjusting the rotation number of thespindle 18 may meet with failure if there is a large difference between the positions of the dancer rolls 31. - Specifically, in cases where the two bobbins B are supported by the
common spindle 18 as in the present embodiment, adjustment of the rotation number of thespindle 18 to return back one of the dancer rolls 31 to the reference position necessitates the other of the dancer rolls 31 to move simultaneously. As a result, even though the one of the dancer rolls 31 is returned back to the reference position, the other of the dancer rolls 31 may reach the upper limit position or the lower limit position. That is, because the adjustment of the rotation number of thespindle 18 disadvantageously moves all the dancer rolls 31 uniformly, there has been a limitation in the positional control of eachindividual dancer roll 31. Taking the above into consideration, in the present embodiment, in addition to the "winding speed control" of adjusting the rotation number of thespindle 18, there is performed "positional difference eliminating control" of adjusting the traversal speed of eachtraverse unit 19 individually. This enables versatile control. - One of factors for causing a large difference between the positions of the two dancer rolls 31 is a difference between the production speeds of the two yarns Y. For example, reference is made to a case where carbon fiber yarns Y are produced in the
yarn production apparatus 100. In this case, the yarns Y are produced by baking material precursors. A large difference between the production speeds of the two yarns Y may be caused by a difference between the degrees of shrinkage at the time of baking, a difference between the gripping forces of rollers feeding the yarns Y, and/or the like. The positional difference eliminating control of the present embodiment is particularly effective in such a case. -
FIG. 3 is a flowchart illustrating processing of the positional control of the dancer rolls 31.FIG. 4 is a flowchart illustrating processing of the winding speed control.FIG. 5 is a flowchart illustrating processing of the positional difference eliminating control. While the yarns Y are wound, the processing of the winding speed control (Step S10) and the processing of the positional difference eliminating control (Step S11) are performed at appropriate timings (for example, at predetermined time intervals). While in the present embodiment, the processing of the positional difference eliminating control is performed subsequently to the processing of the winding speed control, both the control processes may be performed simultaneously. In the following description, directions with respect to the position of thedancer roll 31 are defined as follows: the direction toward the upper side (relaxation side) is a positive direction of a coordinate, and the direction toward the lower side (tension side) is a negative direction of the coordinate. - Now, the winding speed control is described with reference to
FIG. 4 . In the winding speed control of the present embodiment, the rotation number of thespindle 18 is adjusted so that thelower dancer roll 31, positioned lower than the other, is returned to a reference position PO. Hereinafter, for the sake of differentiation, "A" is affixed to reference sings for elements related to one of the yarns Y, and "B" is affixed to reference signs for elements related to the other of the yarns Y, as needed. - First of all, the
controller 20 obtains positions PA and PB of the dancer rolls 31A and 31B, which are respectively detected by the position sensors 34A and 34B (Step S20). Then, thecontroller 20 determines whether the position PA of the dancer roll 31A is lower than the position PB of the dancer roll 31B (Step S21). When the position PA of the dancer roll 31A is lower than the position PB of the dancer roll 31B (Step S21: YES), thecontroller 20 determines whether the position PA of the dancer roll 31A is higher than the reference position PO (Step S22). When the position PA of the dancer roll 31A is higher than the reference position PO (Step S22: YES), thecontroller 20 reduces the rotation number of the spindle 18 (Step S23), so as to lower the position PA of the dancer roll 31A to the reference position PO, and then the processing of the winding speed control ends. - Meanwhile, when the position PA of the dancer roll 31A is not higher than the reference position PO (Step S22: NO), the
controller 20 determines whether the position PA of the dancer roll 31A is lower than the reference position PO (Step S24). When the result of the above determination shows that the position PA of the dancer roll 31A is lower than the reference position PO (Step S24: YES), thecontroller 20 increases the rotation number of the spindle 18 (Step S25) so as to raise the position PA of the dancer roll 31A to the reference position PO, and then the processing of the winding speed control ends. When the position PA of the dancer roll 31A is not lower than the reference position PO (Step S24: NO), it is indicated that the position PA of the dancer roll 31A is level with the reference position PO, and therefore the processing of the winding speed control ends without changing the rotation number of thespindle 18. - When the result of the determination in Step S21 is NO, the
controller 20 determines whether the position PB of the dancer roll 31B is higher than the reference position PO (Step S26). When the result of the above determination shows that the position PB of the dancer roll 31B is higher than the reference position PO (Step S26: YES), thecontroller 20 decreased the rotation number of the spindle 18 (Step S27) so as to lower the position PB of the dancer roll 31B to the reference position PO, and then the processing of the winding speed control ends. - Meanwhile, when the position PB of the dancer roll 31B is not higher than the reference position PO (Step S26: NO), the
controller 20 determines whether the position PB of the dancer roll 31B is lower than the reference position PO (Step S28). When the result of the above determination shows that the position PB of the dancer roll 31B is lower than the reference position PO (Step S28: YES), thecontroller 20 increases the rotation number of the spindle 18 (Step S29) so as to raise the position PB of the dancer roll 31B to the reference position PO, and then the processing of the winding speed control ends. When the position PB of the dancer roll 31B is not lower than the reference position PO (Step S28: NO), it is indicated that the position PB of the dancer roll 31B is level with the reference position PO, and therefore the processing of the winding speed control ends without changing the rotation number of thespindle 18. - Next, the processing of the positional difference eliminating control is described with reference to
FIG. 5 . In the positional difference eliminating control of the present embodiment, when there is a large difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B, the traversal speed of thetraverse unit 19 traversing the yarn Y wound onto thedancer roll 31 higher than the other is adjusted so as to move only thehigher dancer roll 31 to the reference position PO. - First of all, the
controller 20 obtains the positions PA and PB of the dancer rolls 31A and 31B, which are respectively detected by the position sensors 34A and 34B (Step S30). Then, thecontroller 20 determines whether the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B is within (equal to or smaller than) a predetermined threshold PX (Step S31). When the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B is equal to or smaller than the threshold PX (Step S31: YES), the processing of the positional difference eliminating control ends without changing the traversal speed of any of thetraverse units - Meanwhile, when the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B exceeds the threshold PX (Step S31: NO), the
controller 20 determines whether the position PA of the dancer roll 31A is lower than the position PB of the dancer roll 31B (Step S32). When the result of the above determination shows that the position PA of the dancer roll 31A is lower than the position PB of the dancer roll 31B (Step S32: YES), thecontroller 20 decreases the traversal speed of thetraverse unit 19B for a predetermined period of time so as to lower the position PB of the dancer roll 31B, which is positioned higher, to the reference position PO (Step S33). Then, thecontroller 20 returns the traversal speed of thetraverse unit 19B back to its original speed (Step S34), and the processing of the positional difference eliminating control ends. - Meanwhile, when the result of the determination in Step S32 is NO, the
controller 20 decreases the traversal speed of thetraverse unit 19A for the predetermined period of time so as to lower the position PA of the dancer roll 31A, which is positioned higher, to the reference position PO (Step S35). Then, thecontroller 20 returns the traversal speed of thetraverse unit 19A back to its original speed (Step S36), and the processing of the positional difference eliminating control ends. The above-mentioned "predetermined period of time" during which the traversal speed is adjusted in each Step S33, S35 may be freely set as needed. In the present embodiment, the predetermined period of time is equal to a time period of a single reciprocation cycle in which thetraverse guide 19a reciprocates once in the traverse direction. - As described above, in the positional control of the dancer rolls 31 of the present embodiment, the processing of the winding speed control is performed first. With this, both of the dancer rolls 31A and 31B move uniformly toward the upper or lower side so that the lower one of the dancer rolls 31A and 31B, which is positioned lower than the other, returns back to the reference position PO. In the processing of the positional difference eliminating control performed subsequently, only the
upper dancer roll 31, which is positioned higher than the other, is moved to the reference position PO when there is a large difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B. In this case, the difference in position between thisdancer roll 31 and theother dancer roll 31, which has already moved to the reference position PO in the winding speed control, is reduced. That is, by performing the processing of the winding speed control in Step S10 and subsequently performing the processing of the positional difference eliminating control in Step S11, both the dancer rolls 31A and 31B are kept at or close to the reference position PO. - Returning back to
FIG. 3 , after Steps S10 and S11 are performed, thecontroller 20 determines whether the formation of the packages P has been completed, that is, whether the packages P have become full, based on outputs from unillustrated sensors or the like (Step S12). When the formation of the packages P has not been completed (Step S12: NO), the processing of the winding speed control and the processing of the positional difference eliminating control are repeated. - Meanwhile, when the formation of the packages P has been completed (Step S12: YES), processing of forced positional difference eliminating control is performed (Step S13). The forced positional difference eliminating control is the same as the positional difference eliminating control except that it is forcedly performed regardless of whether the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B exceeds the threshold PX. Specifically, in this processing, Step S31 is skipped in the flowchart of
FIG. 5 , and Step S32 is performed after Step S30. Immediately after the processing of the forced positional difference eliminating control is performed, theturret 17 is rotated to interchange the positions of the twospindles 18 with each other, and then theyarn holding portions 18a are controlled so that the yarns Y are held by the respective bobbins B, and simultaneously with this, the yarns Y leading to the respective packages P are cut by the respective cutters 23 (Step S14). With this, winding of the yarns Y onto the respective empty bobbins B is started. Immediately after the start of the winding, the processing of the forced positional difference eliminating control is performed again (Step S15), and the series of steps are repeatedly performed from Step S10. - In the present embodiment, the position of a desired one of the dancer rolls 31 is controllable by adjusting the traversal speed of the traverse unit (19A or 19B) traversing the yarn Y wound onto the desired one of the dancer rolls 31. Thus, the position PA, PB of each dancer roll 31A, 31B is individually controllable by adjusting the traversal speed of the corresponding traverse unit. This makes it possible to properly control the position PA, PB of the dancer roll 31A, 31B.
- Furthermore, in the present embodiment, when the difference between the positions PA and PB of the two dancer rolls 31A and 31B exceeds the predetermined threshold PX, the
controller 20 performs the positional difference eliminating control of reducing the difference between the positions PA and PB of the two dancer rolls 31A and 31B to a level equal to or smaller than the threshold PX by adjusting the traversal speed of at least one of the twotraverse units - Furthermore, in the positional difference eliminating control in the present embodiment, the
controller 20 is configured to decrease the traversal speed of thetraverse unit 19 which traverses the yarn Y wound onto theupper dancer roll 31, which is positioned on the upper side (relaxation side) relatively to the other, out of the two dancer rolls 31A and 31B. This moves theupper dancer roll 31 to the lower side (tension side), and decreases the difference between the positions PA and PB the dancer rolls 31A and 31B. A slip of the yarn Y may occur as a result of increasing the traversal speed. However, the position of thedancer roll 31 is controlled by decreasing the traversal speed as above, and therefore the slip of the yarn Y is avoidable. - Furthermore, in the present embodiment, the
controller 20 is configured to perform processing of the positional difference eliminating control within the time period of a single reciprocation cycle in which thetraverse unit 19 reciprocates the yarn Y once in the traverse direction. Long-term execution of the positional difference eliminating control, in which the traversal speed is changed, may misshape the package P. Performing the processing of the positional difference eliminating control only for the short period of time as described above ensures good quality of the packages P. - Furthermore, in the present embodiment, the
controller 20 is configured to perform the positional difference eliminating control irrespective of whether or not the difference of the positions PA and PB of the two dancer rolls 31A and 31B exceeds the threshold PX (thecontroller 20 is configured to perform the forced positional difference eliminating control) immediately before interchanging the positions of the twospindles 18 by the turret 17 (switching device). When there is a large difference between the positions PA and PB of the dancer rolls 31A and 31B at the time of cutting the yarns Y, there is a possibility that variations in the timings of cutting the yarns Y occur, and/or one or some of the yarns Y cannot be cut. Forcedly performing the positional difference eliminating control immediately before the interchanging the positions of thespindles 18 as above enables cutting the yarns Y simultaneously. - Furthermore, in the present embodiment, the
controller 20 is configured to perform the positional difference eliminating control irrespective of whether or not the difference between the positions PA and PB of the two dancer rolls 31A and 31B exceeds the threshold PX (thecontroller 20 is configured to perform the forced positional difference eliminating control) immediately after the yarns Y are cut by the cutters 23 (cutting means). Although in the present embodiment, the position PA, PB of the dancer roll 31A, 31B is controllable by adjusting the traversal speed of the corresponding traverse unit, it is preferable that the traversal speed is as constant as possible in order to improve the quality of the packages P. Thus, forcedly performing the positional difference eliminating control immediately after cutting the yarns Y as described above, i.e., at the time of starting the winding of the yarns Y onto empty bobbins B, minimizes the necessity to change the traversal speed during the winding process. - Furthermore, in the present embodiment, the
controller 20 is capable of changing the traverse widths of thetraverse units 19. This advantageous feature is described with reference toFIG. 6. FIG. 6 is a schematic diagram illustrating the change in the winding width with a change in the traversal speed.FIG. 6 shows a development view of a package P on a sheet. At normal winding times during which no positional difference eliminating control is performed, thetraverse guide 19a reciprocates at a traversal speed V1 and a traverse width W1, and draws a trajectory S1, which is indicated with a dashed line. Between thetraverse guide 19a and the outer circumferential surface of the package P, the yarn Y has a part which does not follow thetraverse guide 19a at the time of turnaround of thetraverse guide 19a, the part being so called "free length". Due to this, when thetraverse guide 19a turns around, the wound yarn Y turns back at a point inward of the trajectory of thetraverse guide 19a, as indicated with bold solid lines inFIG. 6 . That is to say, the actual winding width X1 is shorter than the traverse width W1. Taking the above phenomenon into consideration, the traversal speed V1 and the traverse width W1 are determined beforehand so that the winding width X1 is equal to a desired value. - Now, when the traversal speed is decreased to V2 while keeping the traverse width at W1 in the positional difference eliminating control, the trajectory of the
traverse guide 19a changes to S2, as indicated with two-dot chain line. The decrease of the traversal speed makes it easier for the yarn Y to follow thetraverse guide 19a at the time of turnaround of thetraverse guide 19a, and therefore the winding width X2 in this situation is longer than the winding width X1 of the normal winding times. To the contrary, when the traversal speed is increased, the winding width becomes shorter than the winding width X1 of the normal winding times, though it is not illustrated. Thus, the actual winding width changes with the change of the traversal speed. Accordingly, in the above-described arrangement in which the traverse width of eachtraverse unit 19 is changeable, it is possible to keep the winding width constant by adjusting the traverse width depending on the change of the traversal speed. - For example, in the present embodiment, it is preferable that when decreasing the traversal speed of one or more of the
traverse units 19, thecontroller 20 decreases the traverse widths of the one ormore traverse units 19. As described above, the slip of the yarn Y is avoidable by decreasing the traversal speed to control the position of thedancer roll 31. However, the decrease of the traversal speed makes the actual winding width longer, which may lead to cob-webbing. To deal with this, the traverse width is decreased to be shorter than W1 at the same time when the traversal speed is decreased. This makes it possible to maintain the winding width constant at X1, while avoiding the slip of the yarn Y. - Furthermore, in the present embodiment, the
controller 20 is configured to perform the winding speed control of moving the positions of the dancer rolls 31A and 31B by adjusting the rotation number of thespindle 18. Performing the winding speed control makes it possible to control the position of the dancer roll 31A, 31B not only by adjusting the traversal speed, but also by adjusting the rotation number of thespindle 18. - Furthermore, in the present embodiment, the
controller 20 is configured to adjust the rotation number of thespindle 18 so that one of the dancer rolls 31A and 31B moves to the reference position PO in the winding speed control. With this winding speed control, one of the dancer rolls (dancer roll 31A or 31B) is moved to the reference position PO. Due to this, merely by performing the positional difference eliminating control for the other of the dancer rolls (dancer roll 31B or 31A) so as to reduce the difference between the positions PA and PB of the dancer rolls 31A and 31B, it is possible to keep all the dancer rolls 31A and 31B at the reference position PO. - Furthermore, in the present embodiment, the
controller 20 adjusts, in the winding speed control, the rotation number of thespindle 18 so that the lowest one of the dancer rolls 31A and 31B moves to the reference position PO. When the winding speed control is performed so that the lowest one of the dancer rolls (dancer roll 31A or 31B) moves to the reference position PO, the other one of the dancer rolls (dancer roll 31B or 31A) shall be positioned higher than the reference position PO. When performing the positional difference eliminating control to the other one of the dancer rolls (dancer roll 31B or 31A) so as to reduce the difference from the position (PA or PB) of the one of the dancer rolls (dancer roll 31A or 31B), the traversal speed shall be decreased. Accordingly, the slip of the yarn Y is avoidable, as described above. - While the above-described embodiment deals with an example of the positional control of the dancer rolls 31, the specific contents of the control are not limited to those described in the above embodiment. For example, in the winding speed control, one of the dancer rolls 31 which has been selected beforehand may be moved to the reference position PO, or the rotation number of the
spindle 18 may be adjusted so that the average position of the plurality of dancer rolls 31 is level with the reference position PO. Furthermore, in the positional difference eliminating control, the dancer roll(s) 31 to be moved is changeable as needed, and two or more dancer rolls 31 may be moved at the same time, that is, the traversal speeds of two ormore traverse units 19 may be changed at the same time. - The winding speed control and the positional difference eliminating control in another embodiment are described with reference to
FIG. 7 andFIG. 8 . In the winding speed control of the other embodiment, the rotation number of thespindle 18 is adjusted so that the dancer roll 31A is returned to the reference position PO. First of all, thecontroller 20 obtains the position PA of the dancer roll 31A, which is detected by the position sensor 34A (Step S40). Then, thecontroller 20 determines whether the position PA of the dancer roll 31A is higher than the reference position PO (Step S41). When the position PA of the dancer roll 31A is higher than the position PO (Step S41: YES), thecontroller 20 reduces the rotation number of thespindle 18 so as to lower the position PA of the dancer roll 31A to the reference position PO (Step S42), and the processing of the winding speed control ends. When the result of the determination in Step S41 is NO, thecontroller 20 determines whether the position PA of the dancer roll 31A is lower than the reference position PO (Step S43). When the result of the above determination shows that the position PA of the dancer roll 31A is lower than the reference position PO (Step S43: YES), thecontroller 20 increases the rotation number of thespindle 18 so as to raise the position PA of the dancer roll 31A to the reference position PO (Step S44), and the processing of the winding speed control ends. When the result of the above determination in Step S43 is NO, the result shows that the position PA of the dancer roll 31A is level with the reference position PO, and therefore the processing of the winding speed control ends without changing the rotation number of thespindle 18. - In the positional difference eliminating control of the other embodiment, when there is a large difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B, the traversal speed of the
traverse unit 19B is adjusted so as to move the dancer roll 31B to the reference position PO. First of all, thecontroller 20 obtains the positions PA and PB of the dancer rolls 31A and 31B, which are respectively detected by the position sensors 34A and 34B (Step S50). Then, thecontroller 20 determines whether the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B is within (equal to or smaller than) a predetermined threshold PX (Step S51). When the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B is equal to or smaller than the threshold PX (Step S51: YES), the processing of the positional difference eliminating control ends without changing the traversal speed of any of thetraverse units - Meanwhile, when the difference between the position PA of the dancer roll 31A and the position PB of the dancer roll 31B exceeds the threshold PX (Step S51: NO), the
controller 20 determines whether the position PB of the dancer roll 31B is higher than the reference position PO (Step S52). When the result of the above determination shows that the position PB of the dancer roll 31B is higher than the reference position PO (Step S52: YES), thecontroller 20 decreases the traversal speed of thetraverse unit 19B for a predetermined period of time so as to lower the position PB of the dancer roll 31B to the reference position PO (Step S53). Then, thecontroller 20 returns the traversal speed of thetraverse unit 19B back to its original speed (Step S54), and the processing of the positional difference eliminating control ends. Meanwhile, when the result of the determination in Step S52 is NO, thecontroller 20 increases the traversal speed of thetraverse unit 19B for a predetermined period of time so as to raise the position PB of the dancer roll 31B to the reference position PO (Step S55). Then, thecontroller 20 returns the traversal speed of thetraverse unit 19B back to its original speed (Step S56), and the processing of the positional difference eliminating control ends. - Thus, the positional control of the dancer rolls 31 of the other embodiment is arranged such that: the winding speed control is made so as to move the dancer roll 31A to the reference position PO; and the positional difference eliminating control is made so as to move the dancer roll 31B to the reference position PO. That is, the dancer roll to be controlled is fixed in each control processing, and this simplifies the positional control.
- In the above-described embodiment, the
yarn winder 1 is configured so that eachcommon spindle 18 supports two bobbins (packages P). In this regard, however, three or more bobbins B (packages P) may be supported by onespindle 18. - Furthermore, while in the above-described embodiments, the reference position PO of the dancer rolls 31 is defined as a predetermined position, the reference position PO may be defined as a predetermined range.
Claims (11)
- A yarn winder including at least one common spindle each configured to support a plurality of bobbins, the yarn winder configured to rotate the spindle to wind yarns onto the bobbins respectively to form packages, the yarn winder comprising:traverse units configured to traverse the yarns respectively;dancer rolls onto which the yarns are respectively wound, each of the dancer rolls configured to be movable from a predetermined reference position toward a relaxation side on which a corresponding one of the yarns is relaxed and toward a tension side on which yarn slack is removed;position detectors configured to detect positions of the dancer rolls, respectively; anda controller configured to control a position of at least one of the dancer rolls based on outputs from the position detectors by adjusting traversal speed of corresponding at least one of the traverse units traversing the yarn wound onto the at least one of the dancer rolls.
- The yarn winder according to claim 1, wherein when a difference between positions of freely-selected two of the dancer rolls exceeds a predetermined threshold, the controller performs positional difference eliminating control of reducing the difference between the positions of the two dancer rolls to a level equal to or smaller than the threshold by adjusting the traversal speed of at least one of two traverse units traversing the yarns wound onto the two dancer rolls.
- The yarn winder according to claim 2, wherein in the positional difference eliminating control, the controller is configured to decrease the traversal speed of a corresponding one of the two traverse units which traverses the yarn wound onto a relaxation-side dancer roll of the two dancer rolls, the relaxation-side dancer roll being on the relaxation side relatively to the other dancer roll.
- The yarn winder according to claim 2 or 3, wherein the controller is configured to perform processing of the positional difference eliminating control within a time period of a single reciprocation cycle in which the traverse unit reciprocates the yarn once in a traverse direction.
- The yarn winder according to any one of claims 2 to 4, in which the at least one spindle includes two spindles, the yarn winder further comprising:a switching device configured to support the two spindles so that positions of the two spindles are interchangeable with each other between a winding position at which the yarns are respectively wound onto the bobbins and a collection position at which the packages are collected; anda plurality of cutting means configured to respectively cut the yarns leading to the packages supported by the spindle having been moved from the winding position to the collection position by the switching device, whereinthe controller is configured to perform the positional difference eliminating control immediately before interchanging the positions of the two spindles by the switching device, irrespective of whether or not the difference between the positions of the two dancer rolls exceeds the threshold.
- The yarn winder according to claim 5, wherein the controller is configured to perform the positional difference eliminating control immediately after the yarns are cut by the plurality of cutting means, irrespective of whether or not the difference between the positions of the two dancer rolls exceeds the threshold.
- The yarn winder according to any one of claims 1 to 6, wherein the controller is capable of changing traverse widths of the traverse units.
- The yarn winder according to claim 7, wherein when decreasing the traversal speeds of one or more of the traverse units, the controller is configured to decrease the traverse widths of the one or more traverse units.
- The yarn winder according to any one of claims 1 to 8, wherein the controller is configured to perform winding speed control of moving the positions of the dancer rolls by adjusting a rotation number of the spindle.
- The yarn winder according to claim 9, wherein in the winding speed control, the controller is configured to adjust the rotation number of the spindle so that one of the dancer rolls is moved to the reference position.
- The yarn winder according to claim 10, wherein in the winding speed control, the controller is configured to adjust the rotation number of the spindle so that out of the dancer rolls, the dancer roll positioned farthest on the tension side from the reference position is moved to the reference position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017026578A JP6813385B2 (en) | 2017-02-16 | 2017-02-16 | Thread winder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3363756A1 true EP3363756A1 (en) | 2018-08-22 |
EP3363756B1 EP3363756B1 (en) | 2019-12-04 |
Family
ID=61163551
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18155075.7A Active EP3363756B1 (en) | 2017-02-16 | 2018-02-05 | Yarn winder |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3363756B1 (en) |
JP (1) | JP6813385B2 (en) |
CN (1) | CN108439061B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220396452A1 (en) * | 2021-06-10 | 2022-12-15 | Honda Motor Co., Ltd. | Filament winding method and filament winding apparatus |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020075382A1 (en) * | 2018-10-09 | 2020-04-16 | Tmtマシナリー株式会社 | Yarn winding machine |
DE102018125622A1 (en) * | 2018-10-16 | 2020-04-16 | Saurer Spinning Solutions Gmbh & Co. Kg | Method of operating a winding device |
JP7127001B2 (en) * | 2019-10-04 | 2022-08-29 | Tmt神津株式会社 | Turret type winding device |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1710087A1 (en) * | 1966-01-17 | 1971-11-04 | Leesona Corp | Dishwasher |
US3672589A (en) * | 1969-05-21 | 1972-06-27 | Kamitsu Seisakusho Ltd | Detection arrangement of winding speed on a take-up winder |
US3822832A (en) * | 1971-11-27 | 1974-07-09 | S Torii | Process and apparatus for compensating the yarn tension difference between two yarns on a spindle drive type winding machine |
DE2936181A1 (en) * | 1979-09-07 | 1981-03-19 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Tension control device for simultaneously winding multiple threads - regulates winding speed according to sum of individual thread tensions |
JPH02270774A (en) * | 1989-04-12 | 1990-11-05 | Toray Ind Inc | Yarn winder |
JPH11301930A (en) | 1998-04-20 | 1999-11-02 | Torii Tekkosho:Kk | Tension control device for yarn winding machine |
EP2557061A2 (en) * | 2011-08-12 | 2013-02-13 | Georg Sahm Gmbh & Co. Kg | Winding machine and method for controlling the same |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3971517A (en) * | 1972-05-15 | 1976-07-27 | Teijin Limited | Apparatus for winding a yarn round a bobbin |
JPS5831867A (en) * | 1981-08-20 | 1983-02-24 | Torii Tekkosho:Kk | Tension controller of winder |
CN87107361A (en) * | 1986-12-18 | 1988-06-29 | 巴马格股分公司 | Coiling yarn prevention snarling method and anti-patterning device |
JP2877172B2 (en) * | 1991-09-17 | 1999-03-31 | 東レ株式会社 | Yarn winding device |
FR2700761B1 (en) * | 1993-01-28 | 1995-02-24 | Icbt | Method for winding up (winding) a thread on a textile machine and machine using such a method. |
JPH0859081A (en) * | 1994-06-14 | 1996-03-05 | Tanabe Kogyo Kk | Fine line winding machine |
JP2007204191A (en) * | 2006-01-31 | 2007-08-16 | Murata Mach Ltd | Yarn take-up device |
JP5364482B2 (en) * | 2009-07-17 | 2013-12-11 | Tmtマシナリー株式会社 | Yarn winding machine and winding method of yarn |
CN201704508U (en) * | 2010-04-19 | 2011-01-12 | 常州市宏发纵横新材料科技有限公司 | Yarn constant tension and constant linear speed control device |
CN202156828U (en) * | 2011-07-08 | 2012-03-07 | 浙江思博恩新材料科技有限公司 | Diamond wire winding system |
CN102527748A (en) * | 2012-01-06 | 2012-07-04 | 无锡奥特维科技有限公司 | Winding and arranging control system of fine steel wire drawing machine |
CN203652914U (en) * | 2013-12-23 | 2014-06-18 | 衡水永利钢丝有限公司 | Spool type automatic winding device |
CN205855608U (en) * | 2016-07-06 | 2017-01-04 | 合肥通鼎光电科技有限公司 | A kind of governing mechanism of tension of optical fiber wire releasing device |
-
2017
- 2017-02-16 JP JP2017026578A patent/JP6813385B2/en active Active
-
2018
- 2018-01-30 CN CN201810088190.5A patent/CN108439061B/en active Active
- 2018-02-05 EP EP18155075.7A patent/EP3363756B1/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1710087A1 (en) * | 1966-01-17 | 1971-11-04 | Leesona Corp | Dishwasher |
US3672589A (en) * | 1969-05-21 | 1972-06-27 | Kamitsu Seisakusho Ltd | Detection arrangement of winding speed on a take-up winder |
US3822832A (en) * | 1971-11-27 | 1974-07-09 | S Torii | Process and apparatus for compensating the yarn tension difference between two yarns on a spindle drive type winding machine |
DE2936181A1 (en) * | 1979-09-07 | 1981-03-19 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Tension control device for simultaneously winding multiple threads - regulates winding speed according to sum of individual thread tensions |
JPH02270774A (en) * | 1989-04-12 | 1990-11-05 | Toray Ind Inc | Yarn winder |
JPH11301930A (en) | 1998-04-20 | 1999-11-02 | Torii Tekkosho:Kk | Tension control device for yarn winding machine |
EP2557061A2 (en) * | 2011-08-12 | 2013-02-13 | Georg Sahm Gmbh & Co. Kg | Winding machine and method for controlling the same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220396452A1 (en) * | 2021-06-10 | 2022-12-15 | Honda Motor Co., Ltd. | Filament winding method and filament winding apparatus |
Also Published As
Publication number | Publication date |
---|---|
CN108439061A (en) | 2018-08-24 |
JP2018131301A (en) | 2018-08-23 |
EP3363756B1 (en) | 2019-12-04 |
CN108439061B (en) | 2021-04-09 |
JP6813385B2 (en) | 2021-01-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3363756B1 (en) | Yarn winder | |
WO2012096040A1 (en) | Spun yarn winding device and spun yarn winding facility | |
JP6176952B2 (en) | How to optimize the winding speed of the working part of an autowinder | |
KR101823426B1 (en) | Textile machine | |
US7540174B2 (en) | Method and apparatus for circular knitting with elastomeric yarn that compensate for yarn package relaxation | |
EP3315441B1 (en) | Traversing unit and yarn winding device | |
JP7269783B2 (en) | Spinning take-up device | |
US20090134263A1 (en) | Method for Avoiding Ribbon Windings | |
KR100745498B1 (en) | System for winding elastic yarn, winder for elastic yarn and method of winding elastic yarn | |
JP4612673B2 (en) | Winding device | |
EP2105400A2 (en) | Yarn winding machine and yarn winding method | |
JP2022145899A (en) | Yarn take-up machine and method of producing package | |
EP3950552B1 (en) | Yarn winder | |
KR100641681B1 (en) | Winding tention control method and system for winder | |
JP7447121B2 (en) | winding machine | |
CN107472991B (en) | Traversing device of yarn winder | |
KR101675813B1 (en) | Device for adjusting yarn winding width using auxiliary guide | |
CN108436724B (en) | Wire saw and method for operating wire saw | |
JPH0789671A (en) | Taking-up of high ductility yarn and device therefor | |
KR101538887B1 (en) | The flow axis of the bobbin winder tension | |
CN111675020A (en) | Yarn winding machine and yarn winding method | |
JP2023143807A (en) | Yarn winding machine | |
JPH10273268A (en) | Thread switching method for turret type thread winder | |
JP2004196512A (en) | Filament winding method | |
US2211328A (en) | Filament tensioning device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20190114 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
INTG | Intention to grant announced |
Effective date: 20190923 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1209145 Country of ref document: AT Kind code of ref document: T Effective date: 20191215 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602018001419 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20191204 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200305 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200429 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200404 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602018001419 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 1209145 Country of ref document: AT Kind code of ref document: T Effective date: 20191204 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20200229 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200205 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
26N | No opposition filed |
Effective date: 20200907 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200229 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200205 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200229 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210228 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210228 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20220205 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220205 |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230426 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20240216 Year of fee payment: 7 |