EP3453662B1 - Yarn winding machine - Google Patents
Yarn winding machine Download PDFInfo
- Publication number
- EP3453662B1 EP3453662B1 EP18187840.6A EP18187840A EP3453662B1 EP 3453662 B1 EP3453662 B1 EP 3453662B1 EP 18187840 A EP18187840 A EP 18187840A EP 3453662 B1 EP3453662 B1 EP 3453662B1
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- EP
- European Patent Office
- Prior art keywords
- package
- yarn
- section
- position information
- catching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004804 winding Methods 0.000 title claims description 62
- 230000001276 controlling effect Effects 0.000 description 28
- 238000005304 joining Methods 0.000 description 16
- 238000001514 detection method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000012806 monitoring device Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000036962 time dependent Effects 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
Images
Classifications
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- 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
- B65H67/08—Automatic end-finding and material-interconnecting arrangements
- B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
- B65H67/085—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement end-finding at the take-up package, e.g. by suction and reverse package rotation
-
- 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
- B65H54/40—Arrangements for rotating packages
- B65H54/54—Arrangements for supporting cores or formers at winding stations; Securing cores or formers to driving members
- B65H54/553—Both-ends supporting arrangements
-
- 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
-
- 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
- B65H54/40—Arrangements for rotating packages
- B65H54/44—Arrangements for rotating packages in which the package, core, or former is engaged with, or secured to, a driven member rotatable about the axis of the package
-
- 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
- B65H67/0405—Arrangements for removing completed take-up packages or for loading an empty core
- B65H67/0411—Arrangements for removing completed take-up packages or for loading an empty core for removing completed take-up 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
- B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
- B65H67/08—Automatic end-finding and material-interconnecting arrangements
- B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
-
- 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 winding machine.
- a yarn winding machine for example, a yarn winding machine disclosed in Japanese Patent Application Laid-Open No. 2010-13259 is known in the art.
- this yarn winding machine when a yarn is cut during yarn winding operation, a package is first moved away (that is, lifted up) from a contact roller by an air cylinder, a suction mouth is moved by a certain amount so as to come near the surface of the package, and a yarn end of the package is caught by the suction mouth.
- the inventor recognized that, in the yarn winding machine explained above, there is a possibility that a yarn end of a package may not be reliably caught due to a variation in a lift-up amount.
- One object of the present invention is to provide a yarn winding machine capable of reliably catching a yarn end of a package.
- a yarn winding machine includes a holding section that rotatably holds a package; a contact section capable of contacting a surface of the package; a moving section capable of moving the package between a position at which the package is in contact with the contact section and a position at which the package is separated from the contact section; a yarn catching section capable of moving near or away from the surface of the package and catching a yarn end of the package; a surface position information acquiring section that acquires surface position information indicative of a position of the surface of the package; and a control section that controls a movement of the yarn catching section, and, in a separated state in which the package is separated from the contact section by the moving section, moves the yarn catching section near the surface of the package based on the surface position information acquired by the surface position information acquiring section so that a distance of the yarn catching section from the surface of the package is equal to a predetermined distance.
- the holding section includes a pivoting shaft and is pivotable around the pivoting shaft.
- the moving section is configured to pivot the holding section around the pivoting shaft to move the package between the position at which the package is in contact with the contact section and the position at which the package is separated from the contact section.
- the surface position information acquiring section is an angle sensor that is configured to detect a rotation angle of the holding section around the pivoting shaft as the surface position information.
- upstream and downstream refer to upstream and downstream in a traveling direction of a yarn at the time of yarn winding.
- an automatic winder 1 mainly includes a plurality of winder units (yarn winding machines) 10 arranged side-by-side, an automatic doffing device 80, and a machine-frame controlling device 90.
- Each of the winder units 10 forms a package 30 by winding a yarn 20 that is unwound from a yarn supplying bobbin 21 while traversing the yarn 20.
- the automatic doffing device 80 moves to a position of this winder unit 10, and removes the fully wound package 30 from the winder unit 10.
- the automatic doffing device 80 supplies an empty bobbin in the place of the fully wound package 30 in the winder unit 10.
- the machine-frame controlling device 90 mainly includes a setting section 91 and a displaying section 92.
- the setting section 91 performs setting for each of the winder units 10 according to a setting value input or a control method selected by an operator and the like.
- the displaying section 92 displays a winding state of the yarn 20 in each of the winder units 10 and details on the encountered errors and the like.
- the displaying section 92 can be constituted by a touch panel, and the setting section 91 can be combined with the displaying section 92.
- the setting section 91 changeably sets a later-explained predetermined distance at which an upper yarn suction port 35 comes near a surface of the package 30.
- the winder unit 10 mainly includes a winding unit body 16 and a unit controlling section (control section) 50.
- the unit controlling section 50 includes, for example, a CPU, a RAM, a ROM, an I/O port, and a communication port.
- the ROM stores therein a computer program to control the structural components of the winding unit body 16.
- Various structural components (later-explained in detail) of the winding unit body 16 and the machine-frame controlling device 90 are connected to the I/O port and the communication port, and configured so that control information and the like can be communicated therebetween. Accordingly, the unit controlling section 50 can control the operation of the structural components of the winding unit body 16.
- the winding unit body 16 includes on a yarn traveling path present between the yarn supplying bobbin 21 and a contact roller (contact section) 29, sequentially from the yarn supplying bobbin 21, a yarn unwinding assisting device 12, a tension applying device 13, a yarn joining device 14, and a yarn monitoring device 15.
- a yarn supplying section 11 is arranged below the winding unit body 16. The yarn supplying section 11 is configured such that the yarn supplying bobbin 21 conveyed by a not-shown bobbin conveying system can be held at a predetermined position.
- the yarn unwinding assisting device 12 assists the unwinding of the yarn 20 from the yarn supplying bobbin 21 by causing a regulating member 40 that covers a core tube of the yarn supplying bobbin 21 to move down in coordination with the unwinding of the yarn 20 from the yarn supplying bobbin 21.
- the regulating member 40 touches a balloon of the yarn 20 formed on an upper part of the yarn supplying bobbin 21 by the rotation of the yarn 20 unwound from the yarn supplying bobbin 21 and the centrifugal force, and controls the balloon of the yarn 20 up to an appropriate size, thereby assisting the unwinding of the yarn 20.
- a not-shown sensor is provided near the regulating member 40 to detect a chase portion of the yarn supplying bobbin 21. When the sensor detects the lowering of the chase portion, the yarn unwinding assisting device 12 lowers the regulating member 40, for example, by using a not-shown air cylinder following the lowering of the chase portion.
- the tension applying device 13 applies a predetermined tension to the traveling yarn 20.
- a tension applying device 13 for example, a gate-type device with movable comb teeth arranged with respect to fixed comb teeth can be used.
- the movable comb teeth can be pivoted by a rotary-type solenoid so that the movable comb teeth and the fixed comb teeth are either in an engaged state or a released state.
- a disk-type tension applying device 13 can be used.
- the yarn joining device 14 When the yarn is cut after the yarn monitoring device 15 detects a yarn defect, or when the yarn breaks during unwinding thereof from the yarn supplying bobbin 21 and the like, the yarn joining device 14 performs joining of a lower yarn from the yarn supplying bobbin 21 and an upper yarn from the package 30.
- a yarn joining device that performs joining of the upper yarn and the lower yarn a mechanical knotter, or a device that uses a fluid such as a compressed air and the like can be used.
- the yarn monitoring device 15 includes a head 49 on which a not-shown sensor that detects the thickness of the yarn 20 is arranged, and an analyzer 52 that processes a yarn thickness signal transmitted by the sensor.
- the yarn monitoring device 15 detects the yarn defect such as a slub by monitoring the yarn thickness signal transmitted by the sensor explained above.
- a cutter 39 that cuts the yarn 20 immediately when the yarn monitoring device 15 detects the yarn defect is provided near the head 49.
- a lower yarn catching member 25 that catches a yarn end of the lower yarn and guides the yarn end to the yarn joining device 14 is arranged below the yarn joining device 14.
- An upper yarn catching member 26 that catches a yarn end of the upper yarn and guides the yarn end to the yarn joining device 14 is arranged above the yarn joining device 14.
- the lower yarn catching member 25 includes a lower yarn pipe arm 33 and a lower yarn suction port 32 formed at a tip end of the lower yarn pipe arm 33.
- the upper yarn catching member 26 includes an upper yarn pipe arm 36 and the upper yarn suction port (yarn catching member) 35 that is formed at a tip end of the upper yarn pipe arm 36.
- the lower yarn pipe arm 33 is pivotably supported by a support shaft 34.
- a driving section such as a stepping motor drives the lower yarn pipe arm 33 to pivot around the support shaft 34. Accordingly, the lower yarn catching member 25 moves among a standby position, a yarn catching position at which the lower yarn suction port 32 catches the yarn end of the lower yarn, and a yarn guiding position at which the caught yarn end is guided to the yarn joining device 14.
- the unit controlling section 50 controls the movement of the lower yarn suction port 32 by controlling the driving of the driving section.
- the upper yarn pipe arm 36 is pivotably supported by a support shaft 37.
- a driving section such as a stepping motor drives the upper yarn pipe arm 36 to pivot around the support shaft 37 whereby the upper yarn suction port 35 moves near or away from the surface of the package 30. Accordingly, the upper yarn catching member 26 moves among a standby position, a yarn catching position at which the upper yarn suction port 35 catches the yarn end of the package 30 (in other words, the yarn end positioned on the package 30 or the yarn end of the yarn that is connected to the package 30), and a yarn guiding position at which the caught yarn end is guided to the yarn joining device 14.
- the unit controlling section 50 controls the movement of the upper yarn suction port 35 by controlling the driving of the driving section.
- An appropriate negative pressure source is respectively connected to each of the lower yarn pipe arm 33 and the upper yarn pipe arm 36.
- the lower yarn pipe arm 33 can suck and catch the yarn end of the lower yarn.
- the upper yarn pipe arm 36 can suck and catch the yarn end of the upper yarn.
- a not-shown shutter is arranged on base end sides of the lower yarn pipe arm 33 and the upper yarn pipe arm 36. Each of these shutters opens / closes in accordance with a signal received from the unit controlling section 50. Accordingly, the generation of the suction current in the lower yarn suction port 32 and the upper yarn suction port 35 and stopping thereof is controlled.
- the winding unit body 16 includes a cradle 23 that detachably supports a winding bobbin 22 and the contact roller 29 capable of contacting the winding bobbin 22 or a peripheral surface (surface) of the package 30.
- the winding unit body 16 includes near the cradle 23 an arm-type traversing device 70 that traverses the yarn 20.
- the yarn 20 can be wound around the package 30 while being traversed by the traversing device 70.
- a guide plate 28 is arranged upstream of the traversing location.
- the guide plate 28 guides the yarn 20 on the upstream side to the traversing location.
- a traverse fulcrum 27 that is made of ceramic is arranged further upstream of the guide plate 28.
- the traversing device 70 traverses the yarn 20 in a direction of the arrow shown in FIG. 2 by using the traverse fulcrum 27 as the supporting point.
- the cradle 23 is a holding section that rotatably holds the package 30.
- the cradle 23 (holding section) includes a pivoting shaft 48, and is pivotable around the pivoting shaft 48.
- the cradle 23 pivots and absorbs an increase in the yarn layer diameter of the package 30 that occurs following the winding of the yarn 20 on the winding bobbin 22.
- a rotational speed sensor 24 that measures the rotational speed of the package 30 is arranged corresponding to the cradle 23.
- a package driving motor (package driving section) 41 that is constituted by a servo motor is arranged on the cradle 23.
- the package driving motor 41 rotationally drives the winding bobbin 22 and winds the yarn 20 onto the winding bobbin 22.
- the package driving motor 41 rotationally drives the package 30 (winding bobbin 22) to perform a normal rotation in which a winding direction is a rotation direction.
- the package driving motor 41 rotationally drives the package 30 (winding bobbin 22) to perform a reverse rotation in which an unwinding direction (a direction opposite to the winding direction) is the rotation direction. Operation of the package driving motor 41 is controlled by the unit controlling section 50.
- the unit controlling section 50 controls the operation of the package driving motor 41 and stopping thereof.
- the package driving motor 41 is not limited to the servo motor, and various types of motors such as a step motor and an induction motor can be employed.
- the traversing device 70 includes a traversing arm 74 that is driven by a traverse driving motor such as a servo motor.
- a traverse driving motor such as a servo motor.
- the traversing arm 74 traverses the yarn 20 by performing a reciprocating swinging motion in a winding width direction of the package 30. Operation of the traverse driving motor is controlled by the unit controlling section 50.
- the winding unit body 16 includes a rotating plate 17 that is rotatable around the pivoting shaft 48.
- the cradle 23 can rotate integrally with the rotating plate 17 around the pivoting shaft 48.
- a spring 18 that is configured to act as a tension spring for gradually reducing the contact pressure and an air cylinder 60 are connected to the rotating plate 17.
- a predetermined rotational torque can be applied to the cradle 23 by using the spring 18 and the air cylinder 60.
- the air cylinder 60 is driven by the compressed air.
- the air cylinder 60 is configured as a double acting-type cylinder that includes a piston 601 therein.
- the compressed air of an air pressure P1 is supplied to a cylinder chamber that is located near to the rotating plate 17 side of the piston 601.
- the compressed air of an air pressure P2 is supplied to a cylinder chamber located away from the rotating plate 17 side of the piston 601.
- a solenoid valve 61 is connected to a pipe that is provided to supply to the air cylinder 60 the compressed air of the air pressure P2.
- the air pressure P2 is controlled by the solenoid valve 61 based on a control signal that is input by the unit controlling section 50.
- the air cylinder 60 can move the package 30.
- the air cylinder 60 can pivot the cradle 23 that holds the package 30 around the pivoting shaft 48 to move the package 30 between a position at which the package 30 is in contact with the contact roller 29 and a position at which the package 30 separates from the contact roller 29.
- the air cylinder 60 is a moving section that moves the package 30.
- An angle sensor 44 that detects a rotation angle of the cradle 23 (a rotation angle of the cradle 23 around the pivoting shaft 48) is arranged on the pivoting shaft 48 of the cradle 23.
- the angle sensor 44 is constituted by, for example, a rotary encoder, and transmits to the unit controlling section 50 an angle signal that corresponds to the rotation angle of the cradle 23.
- the diameter of the package 30 can be grasped by detecting the rotation angle by using the angle sensor 44 at the time of a non-lift-up in which the lift up is not performed.
- the rotation angle of the cradle 23 changes in accordance with the lift-up amount (separation distance of the package 30 from the contact roller 29)
- the lift-up amount can be grasped by detecting the rotation angle by using the angle sensor 44 at the time of the lift-up.
- the angle sensor 44 constitutes a surface position information acquiring section that acquires surface position information indicative of the position of the surface of the package 30, and the rotation angle of the cradle 23 corresponds to the surface position information.
- the unit controlling section 50 controls the driving of the air cylinder (moving section) 60 and rotates the cradle 23, and controls the movement of the package 30 between the position at which the package 30 is in contact with the contact roller 29 and the position at which the package 30 is separated from the contact roller 29.
- the unit controlling section 50 controls the catching operation of the lower yarn catching member 25 and the upper yarn catching member 26 (pivoting of the lower yarn pipe arm 33 and the upper yarn pipe arm 36).
- the unit controlling section 50 controls the opening / closing of the shutters arranged in the lower yarn pipe arm 33 and the upper yarn pipe arm 36, and controls the generation of the suction current in the lower yarn suction port 32 and the upper yarn suction port 35 and stopping thereof.
- the unit controlling section 50 controls the driving of the air cylinder 60 to rotate the cradle 23, lifts up the package 30 to the position at which the package 30 is separated from the contact roller 29 to attain a separated state.
- the unit controlling section 50 controls the pivoting of the upper yarn pipe arm 36 so that the upper yarn suction port 35 moves up to a position at the predetermined distance from the surface of the package 30.
- the predetermined distance is stored in the unit controlling section 50.
- the predetermined distance can be a fixed value or a variable value.
- the predetermined distance is changeably set (can be changed as desired) by the setting section 91.
- the package driving motor 41 is controlled, and the normal rotation of the package 30 is slowed down and stopped.
- the driving of the air cylinder 60 is controlled, and the package 30 is lifted up.
- the rotation angle of the cradle 23 is detected by the angle sensor 44, and the upper yarn pipe arm 36 is pivoted so that the upper yarn suction port 35 comes near the package 30 based on the detected rotation angle. Accordingly, the upper yarn suction port 35 moves to the position at the predetermined distance from the surface of the package 30 to be in the separated state.
- a control performed to move the upper yarn suction port 35 specifically, first, based on the rotation angle detected by the angle sensor 44 immediately before the lift-up, the position of the surface of the package 30 is grasped immediately before the lift-up.
- a rotational driving amount of the upper yarn pipe arm 36 that is required to move the upper yarn suction port 35 to the position at the predetermined distance from the surface of the package 30 immediately before the lift-up (hereinafter, "reference rotational driving amount”) is calculated based on the grasped position of the package 30 surface.
- the lift-up amount is grasped based on the rotation angle detected by the angle sensor 44 at the time of the lift-up.
- a rotational driving amount further required for the upper yarn pipe arm 36 to maintain the approach when the package 30 is lifted up (hereinafter, "rotational driving amount to be increased”) is calculated by using the grasped lift-up amount and a predetermined coefficient. Then, the upper yarn pipe arm 36 is pivoted by applying a driving amount calculated by adding the rotational driving amount to be increased to the reference rotational driving amount. As a result, even when the lift-up amount varies, the position of the package 30 surface can be tracked according to that lift-up amount, and the upper yarn suction port 35 can be moved to the position at the predetermined distance from the surface of the package 30.
- the shutter of the upper yarn pipe arm 36 is opened and the suction current is generated in the upper yarn suction port 35.
- the package driving motor 41 is controlled to start the reverse rotation of the package 30. Accordingly, the yarn end of the package 30 that is in the lift-up state and rotating reversely is caught by the upper yarn suction port 35 that is at the position at the predetermined distance from the surface of the package 30.
- the upper yarn suction port 35 is moved toward the yarn joining position. Accordingly, the yarn end of the package 30 is guided to the yarn joining device 14, and the reverse rotation of the package 30 is slowed down and then stopped.
- the yarn joining device 14 starts the yarn joining of the lower yarn caught by the lower yarn suction port 32 and the upper yarn caught by the upper yarn suction port 35. After the yarn joining is completed, the suction current that is flowing in the upper yarn suction port 35 is stopped by closing the shutter of the upper yarn pipe arm 36.
- the lift-up amount may vary as shown in FIGS. 5A and 6A .
- the upper yarn suction port 35 is moved based on the rotation angle of the cradle 23. Therefore, even when the lift-up amount varies, such variation can be tolerated (absorbed), and the upper yarn suction port 35 can be reliably moved to the position at the predetermined distance from the surface of the package 30 as shown in FIGS. 5B and 6B .
- the upper yarn suction port 35 can come near the package 30 according to the lift-up amount, and an appropriate clearance with respect to the package 30 can be ensured. Because the lift-up amount is detected every time the lift-up is performed, effect of the variation in the lift-up amount can be suppressed. A yarn end finding position at which the yarn end of the package 30 is caught can be controlled more precisely. Therefore, according to the winder unit 10, the yarn end of the package 30 can be caught reliably. Thus, yarn end finding efficiency and time efficiency can be improved, and the production efficiency, too, can be improved.
- the cradle 23 is pivotable around the pivoting shaft 48.
- the air cylinder 60 causes the cradle 23 to pivot around the pivoting shaft 48 so as to move the package 30 between the position at which the package 30 is in contact with the contact roller 29 and the position at which the package 30 is separated from the contact roller 29.
- the rotation angle of the cradle 23 is detected by the angle sensor 44. According to such a configuration, even if the lift-up amount varies, the lift-up amount can be accurately grasped based on the detection result of the angle sensor 44. Therefore, by causing the upper yarn suction port 35 to move based on the detection result of the angle sensor 44, the upper yarn suction port 35 can be reliably moved to the position at the predetermined distance from the surface of the package 30.
- the air cylinder 60 is driven by the compressed air.
- the responsiveness related to the lift-up can be increased.
- variation in the lift-up amount tends to be significant, the effect explained above in which the yarn end of the package 30 can be reliably caught is particularly promising.
- the winder unit 10 includes the package driving motor 41 that rotationally drives the package 30.
- the unit controlling section 50 controls the package driving motor 41 so as to rotate the package 30 in the direction opposite to the winding direction. Accordingly, the yarn end of the package 30 can be caught more reliably.
- the predetermined distance is changeably set by the setting section 91. Accordingly, the predetermined distance can be set and changed as desired.
- the predetermined distance is a distance between the surface of the package 30 and the upper yarn suction port 35 that is lifted upward to perform sucking and catching. This distance can be stipulated as a minimum distance between any one end portion among the left and right end portions of the package 30 and an end portion of the upper yarn suction port 35 in the same orientation. Moreover, this distance can be stipulated as a minimum distance between a center of the package 30 in a width direction thereof and a center of the upper yarn suction port 35 in a width direction thereof.
- an optical-type fixed length device can be omitted.
- the above embodiments can include a warning section that outputs a warning based on the rotation angle detected by the angle sensor 44 in the separated state (the surface position information acquired by the surface position information acquiring section). For example, if the rotation angle detected by the angle sensor 44 is larger than an upper limit threshold, or is smaller than a lower limit threshold, the variation of the rotation angles detected by the angle sensor 44 exceeds a predetermined range, and the like, time-dependent change in the lift-up amount can be grasped. Accordingly, by outputting the warning in such a case, attention can be called to that time-dependent change. It becomes possible to determine whether wearing out is present or maintenance is needed in any component such as the air cylinder 60 and the like.
- an alarm device and the like that outputs an alarm can be used as the warning section.
- an alarm that indicates that the lift-up amount is insufficient can be generated.
- a message for the warning section can also be displayed on the displaying section 92. In such a configuration, the displaying section 92 operates as the warning section.
- the angle sensor 44 is included as the surface position information acquiring section; however, in addition to the angle sensor 44, the configuration can include a distance sensor that is arranged on the upper yarn suction port 35 and detects the distance up to the surface of the package 30 as the surface position information.
- a distance sensor 81 which is an optical sensor and the like that emits light along an opening direction of the upper yarn suction port 35, is arranged on the upper yarn suction port 35 (in the figure, on a portion near the upper yarn suction port 35 of the upper yarn catching member 26).
- the distance sensor 81 detects the distance up to the surface of the package 30, and acquires the position of the surface of the package 30.
- the lift-up amount can be accurately grasped based on the detection result of the distance sensor 81.
- the upper yarn suction port 35 By causing the upper yarn suction port 35 to move based on the detection result of the distance sensor 81, the upper yarn suction port 35 can be reliably moved to the position at the predetermined distance from the surface of the package 30.
- the distance sensor is not particularly limited to a certain configuration, and various known distance sensors can be used.
- the configuration in which the package 30 is moved by the air cylinder 60 is cited as an example.
- a configuration in which the package 30 is moved by a hydraulic cylinder and the like can be used.
- the unit controlling section 50 controls the generation of the suction current in the upper yarn suction port 35 and stopping thereof by controlling the opening / closing operation of the shutter; however, the shutter can always be in an open state. In such a configuration, for example, it becomes possible to simplify the control performed by the unit controlling section 50.
- the package 30 is directly rotationally driven by the package driving motor 41; however, the contact roller 29 can be driven and the package 30 can be rotated following the rotation of the contact roller 29.
- the method explained in the above embodiments to detect the diameter of the package 30 at the time of non-lift-up is not limited to such method, and the diameter of the package 30 can be detected by using methods cited as an example below.
- a dedicated yarn speed sensor is arranged on the yarn traveling path to detect the traveling speed of the yarn 20.
- a winding angle is calculated by the unit controlling section 50 based on the traveling speed and the traversing speed of the yarn 20, and the circumferential speed of the package 30 is calculated based on the winding angle and the traveling speed of the yarn 20.
- the diameter of the package 30 can be calculated based on the rotational speed of the package 30 and the circumferential speed of the package 30.
- the diameter of the package 30 can be calculated based on the total length of the yarn 20 that is wound on the package 30, the winding speed of the yarn 20, and the type of the yarn 20 (thickness and the like).
- the package 30 at the time of the lift-up, after causing the package 30 to perform the reverse rotation at once, the package 30 can be caused to perform the normal rotation, or after the package 30 is caused to perform the normal rotation at once, the package 30 can be caused to perform the reverse rotation.
- the package 30 at the time of the lift-up, for a predetermined set time period, the package 30 can be caused to perform the normal rotation or the reverse rotation at a rotational speed at which the yarn end of the package 30 can be pulled away. In such configurations, the yarn end can be easily pulled away from the package 30.
- the setting section 91 can be arranged in the winder unit 10.
- a yarn winding machine includes a holding section that rotatably holds a package; a contact section capable of contacting a surface of the package; a moving section capable of moving the package between a position at which the package is in contact with the contact section and a position at which the package is separated from the contact section; a yarn catching section capable of moving near or away from the surface of the package and catching a yarn end of the package; a surface position information acquiring section that acquires surface position information indicative of a position of the surface of the package; and a control section that controls a movement of the yarn catching section, and, in a separated state in which the package is separated from the contact section by the moving section, moves the yarn catching section near the surface of the package based on the surface position information acquired by the surface position information acquiring section so that a distance of the yarn catching section from the surface of the package is equal to a predetermined distance.
- the yarn catching section is moved based on the acquired surface position information. Therefore, even if the lift-up amount varies, the variation can be tolerated and the yarn catching section can be reliably moved to a position at the predetermined distance from the surface of the package. Therefore, the yarn end of the package can be reliably caught.
- the holding section includes a pivoting shaft and is pivotable around the pivoting shaft.
- the moving section pivots the holding section around the pivoting shaft to move the package between the position at which the package is in contact with the contact section and the position at which the package is separated from the contact section.
- the surface position information acquiring section is an angle sensor that detects a rotation angle of the holding section around the pivoting shaft as the surface position information.
- the surface position information acquiring section can include a distance sensor that is attached to the yarn catching section and detects a distance thereof from the surface of the package as the surface position information.
- the moving section can be driven by compressed air.
- the variation in the lift-up amount tends to be significant. Therefore, the effect explained above in which the yarn end of the package is reliably caught is particularly promising in such a configuration.
- the above yarn winding machine can include a package driving section that rotationally drives the package.
- the control section can control the package driving section to rotate the package in a direction opposite to a winding direction when catching the yarn end of the package by using the yarn catching section in the separated state. With this configuration, the yarn end of the package can be more reliably caught.
- the above yarn winding machine can include a warning section that outputs a warning based on the surface position information acquired by the surface position information acquiring section in the separated state. Based on the surface position information acquired by the surface position information acquiring section in the separated state, time-dependent change in the lift-up amount can be grasped. Therefore, by outputting a warning based on the surface position information acquired by the surface position information acquiring section in the separated state, attention can be called to that time-dependent change.
- the above yarn winding machine can include a setting section for setting and changing the predetermined distance. With this configuration, the predetermined distance can be set and changed as desired.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
Description
- The present invention relates to a yarn winding machine.
- As the conventional yarn winding machine, for example, a yarn winding machine disclosed in
Japanese Patent Application Laid-Open No. 2010-13259 - In such a yarn winding machine, accurate adjustment of a lift-up amount (separation distance of the package from the contact roller) is being attempted so that the distance between the surface of the package from the contact roller always remains constant at the time of the lift-up.
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DE 38 27 345 A1 discloses a yarn winding machine according to the preamble of claim 1. - However, the inventor recognized that, in the yarn winding machine explained above, there is a possibility that a yarn end of a package may not be reliably caught due to a variation in a lift-up amount.
- One object of the present invention is to provide a yarn winding machine capable of reliably catching a yarn end of a package.
- According to one aspect of the present invention, a yarn winding machine includes a holding section that rotatably holds a package; a contact section capable of contacting a surface of the package; a moving section capable of moving the package between a position at which the package is in contact with the contact section and a position at which the package is separated from the contact section; a yarn catching section capable of moving near or away from the surface of the package and catching a yarn end of the package; a surface position information acquiring section that acquires surface position information indicative of a position of the surface of the package; and a control section that controls a movement of the yarn catching section, and, in a separated state in which the package is separated from the contact section by the moving section, moves the yarn catching section near the surface of the package based on the surface position information acquired by the surface position information acquiring section so that a distance of the yarn catching section from the surface of the package is equal to a predetermined distance. The holding section includes a pivoting shaft and is pivotable around the pivoting shaft. The moving section is configured to pivot the holding section around the pivoting shaft to move the package between the position at which the package is in contact with the contact section and the position at which the package is separated from the contact section. The surface position information acquiring section is an angle sensor that is configured to detect a rotation angle of the holding section around the pivoting shaft as the surface position information.
- The above and other objects, features, advantages and technical and industrial significance of this invention will be better understood by reading the following detailed description of presently preferred embodiments of the invention, when considered in connection with the accompanying drawings.
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FIG. 1 is a schematic front view of an automatic winder that includes a winder unit according to an embodiment of the present invention. -
FIG. 2 is a schematic front view showing a configuration of the winder unit shown inFIG. 1 . -
FIG. 3 is a schematic side view showing a layout of structural components near a cradle of the winder unit shown inFIG. 1 . -
FIG. 4A is a schematic diagram showing a layout of the structural components near the cradle of the winder unit shown inFIG. 1 . -
FIG. 4B is another schematic diagram showing a layout of the structural components near the cradle of the winder unit shown inFIG. 1 . -
FIG. 5A is a schematic diagram for explaining a state of the winder unit shown inFIG. 1 at the time of a lift-up. -
FIG. 5B is a schematic diagram showing a state of the winder unit following the state shown inFIG. 5A . -
FIG. 6A is another schematic diagram for explaining a state of the winder unit shown inFIG. 1 at the time of the lift-up. -
FIG. 6B is a schematic diagram showing a state of the winder unit following the state shown inFIG. 6A . -
FIG. 7A is a schematic diagram for explaining a state of a winder unit according to a modification at the time of the lift-up. -
FIG. 7B is another schematic diagram for explaining a state of the winder unit shown inFIG. 7A at the time of the lift-up. - Exemplary embodiments of the present invention are explained below in detail with reference to the accompanying drawings. Identical or corresponding portions are indicated by the same reference symbols in the drawings and redundant explanation thereof is omitted. In the present invention, terms "upstream" and "downstream" refer to upstream and downstream in a traveling direction of a yarn at the time of yarn winding.
- As shown in
FIG. 1 , an automatic winder 1 mainly includes a plurality of winder units (yarn winding machines) 10 arranged side-by-side, anautomatic doffing device 80, and a machine-frame controlling device 90. Each of thewinder units 10 forms apackage 30 by winding ayarn 20 that is unwound from ayarn supplying bobbin 21 while traversing theyarn 20. - When the
package 30 is fully wound in acertain winder unit 10, theautomatic doffing device 80 moves to a position of thiswinder unit 10, and removes the fully woundpackage 30 from thewinder unit 10. Theautomatic doffing device 80 supplies an empty bobbin in the place of the fully woundpackage 30 in thewinder unit 10. - The machine-
frame controlling device 90 mainly includes asetting section 91 and a displayingsection 92. Thesetting section 91 performs setting for each of thewinder units 10 according to a setting value input or a control method selected by an operator and the like. The displayingsection 92 displays a winding state of theyarn 20 in each of thewinder units 10 and details on the encountered errors and the like. The displayingsection 92 can be constituted by a touch panel, and thesetting section 91 can be combined with the displayingsection 92. Thesetting section 91 changeably sets a later-explained predetermined distance at which an upperyarn suction port 35 comes near a surface of thepackage 30. - As shown in
FIG. 2 , thewinder unit 10 mainly includes a windingunit body 16 and a unit controlling section (control section) 50. Theunit controlling section 50 includes, for example, a CPU, a RAM, a ROM, an I/O port, and a communication port. The ROM stores therein a computer program to control the structural components of the windingunit body 16. Various structural components (later-explained in detail) of the windingunit body 16 and the machine-frame controlling device 90 are connected to the I/O port and the communication port, and configured so that control information and the like can be communicated therebetween. Accordingly, theunit controlling section 50 can control the operation of the structural components of the windingunit body 16. - The winding
unit body 16 includes on a yarn traveling path present between theyarn supplying bobbin 21 and a contact roller (contact section) 29, sequentially from theyarn supplying bobbin 21, a yarnunwinding assisting device 12, atension applying device 13, ayarn joining device 14, and ayarn monitoring device 15. Ayarn supplying section 11 is arranged below the windingunit body 16. Theyarn supplying section 11 is configured such that theyarn supplying bobbin 21 conveyed by a not-shown bobbin conveying system can be held at a predetermined position. - The yarn
unwinding assisting device 12 assists the unwinding of theyarn 20 from theyarn supplying bobbin 21 by causing a regulatingmember 40 that covers a core tube of theyarn supplying bobbin 21 to move down in coordination with the unwinding of theyarn 20 from theyarn supplying bobbin 21. The regulatingmember 40 touches a balloon of theyarn 20 formed on an upper part of theyarn supplying bobbin 21 by the rotation of theyarn 20 unwound from theyarn supplying bobbin 21 and the centrifugal force, and controls the balloon of theyarn 20 up to an appropriate size, thereby assisting the unwinding of theyarn 20. A not-shown sensor is provided near the regulatingmember 40 to detect a chase portion of theyarn supplying bobbin 21. When the sensor detects the lowering of the chase portion, the yarn unwinding assistingdevice 12 lowers the regulatingmember 40, for example, by using a not-shown air cylinder following the lowering of the chase portion. - The
tension applying device 13 applies a predetermined tension to the travelingyarn 20. As thetension applying device 13, for example, a gate-type device with movable comb teeth arranged with respect to fixed comb teeth can be used. The movable comb teeth can be pivoted by a rotary-type solenoid so that the movable comb teeth and the fixed comb teeth are either in an engaged state or a released state. Note that, other than the gate-type device, for example, a disk-typetension applying device 13 can be used. - When the yarn is cut after the
yarn monitoring device 15 detects a yarn defect, or when the yarn breaks during unwinding thereof from theyarn supplying bobbin 21 and the like, theyarn joining device 14 performs joining of a lower yarn from theyarn supplying bobbin 21 and an upper yarn from thepackage 30. As such a yarn joining device that performs joining of the upper yarn and the lower yarn, a mechanical knotter, or a device that uses a fluid such as a compressed air and the like can be used. - The
yarn monitoring device 15 includes ahead 49 on which a not-shown sensor that detects the thickness of theyarn 20 is arranged, and ananalyzer 52 that processes a yarn thickness signal transmitted by the sensor. Theyarn monitoring device 15 detects the yarn defect such as a slub by monitoring the yarn thickness signal transmitted by the sensor explained above. Acutter 39 that cuts theyarn 20 immediately when theyarn monitoring device 15 detects the yarn defect is provided near thehead 49. - A lower
yarn catching member 25 that catches a yarn end of the lower yarn and guides the yarn end to theyarn joining device 14 is arranged below theyarn joining device 14. An upperyarn catching member 26 that catches a yarn end of the upper yarn and guides the yarn end to theyarn joining device 14 is arranged above theyarn joining device 14. The loweryarn catching member 25 includes a loweryarn pipe arm 33 and a loweryarn suction port 32 formed at a tip end of the loweryarn pipe arm 33. The upperyarn catching member 26 includes an upperyarn pipe arm 36 and the upper yarn suction port (yarn catching member) 35 that is formed at a tip end of the upperyarn pipe arm 36. - In the lower
yarn catching member 25, the loweryarn pipe arm 33 is pivotably supported by asupport shaft 34. In the loweryarn catching member 25, a driving section such as a stepping motor drives the loweryarn pipe arm 33 to pivot around thesupport shaft 34. Accordingly, the loweryarn catching member 25 moves among a standby position, a yarn catching position at which the loweryarn suction port 32 catches the yarn end of the lower yarn, and a yarn guiding position at which the caught yarn end is guided to theyarn joining device 14. In the loweryarn catching member 25, theunit controlling section 50 controls the movement of the loweryarn suction port 32 by controlling the driving of the driving section. - In the upper
yarn catching member 26, the upperyarn pipe arm 36 is pivotably supported by asupport shaft 37. In the upperyarn catching member 26, a driving section such as a stepping motor drives the upperyarn pipe arm 36 to pivot around thesupport shaft 37 whereby the upperyarn suction port 35 moves near or away from the surface of thepackage 30. Accordingly, the upperyarn catching member 26 moves among a standby position, a yarn catching position at which the upperyarn suction port 35 catches the yarn end of the package 30 (in other words, the yarn end positioned on thepackage 30 or the yarn end of the yarn that is connected to the package 30), and a yarn guiding position at which the caught yarn end is guided to theyarn joining device 14. In the upperyarn catching member 26, theunit controlling section 50 controls the movement of the upperyarn suction port 35 by controlling the driving of the driving section. - An appropriate negative pressure source is respectively connected to each of the lower
yarn pipe arm 33 and the upperyarn pipe arm 36. By generating a suction current in the loweryarn suction port 32, the loweryarn pipe arm 33 can suck and catch the yarn end of the lower yarn. By generating a suction current in the upperyarn suction port 35, the upperyarn pipe arm 36 can suck and catch the yarn end of the upper yarn. A not-shown shutter is arranged on base end sides of the loweryarn pipe arm 33 and the upperyarn pipe arm 36. Each of these shutters opens / closes in accordance with a signal received from theunit controlling section 50. Accordingly, the generation of the suction current in the loweryarn suction port 32 and the upperyarn suction port 35 and stopping thereof is controlled. - The winding
unit body 16 includes acradle 23 that detachably supports a windingbobbin 22 and thecontact roller 29 capable of contacting the windingbobbin 22 or a peripheral surface (surface) of thepackage 30. The windingunit body 16 includes near thecradle 23 an arm-type traversing device 70 that traverses theyarn 20. In the windingunit body 16, theyarn 20 can be wound around thepackage 30 while being traversed by the traversingdevice 70. Aguide plate 28 is arranged upstream of the traversing location. Theguide plate 28 guides theyarn 20 on the upstream side to the traversing location. Atraverse fulcrum 27 that is made of ceramic is arranged further upstream of theguide plate 28. The traversingdevice 70 traverses theyarn 20 in a direction of the arrow shown inFIG. 2 by using thetraverse fulcrum 27 as the supporting point. - The
cradle 23 is a holding section that rotatably holds thepackage 30. The cradle 23 (holding section) includes a pivotingshaft 48, and is pivotable around the pivotingshaft 48. Thecradle 23 pivots and absorbs an increase in the yarn layer diameter of thepackage 30 that occurs following the winding of theyarn 20 on the windingbobbin 22. Arotational speed sensor 24 that measures the rotational speed of thepackage 30 is arranged corresponding to thecradle 23. - A package driving motor (package driving section) 41 that is constituted by a servo motor is arranged on the
cradle 23. Thepackage driving motor 41 rotationally drives the windingbobbin 22 and winds theyarn 20 onto the windingbobbin 22. Thepackage driving motor 41 rotationally drives the package 30 (winding bobbin 22) to perform a normal rotation in which a winding direction is a rotation direction. Thepackage driving motor 41 rotationally drives the package 30 (winding bobbin 22) to perform a reverse rotation in which an unwinding direction (a direction opposite to the winding direction) is the rotation direction. Operation of thepackage driving motor 41 is controlled by theunit controlling section 50. Theunit controlling section 50 controls the operation of thepackage driving motor 41 and stopping thereof. Thepackage driving motor 41 is not limited to the servo motor, and various types of motors such as a step motor and an induction motor can be employed. - The traversing
device 70 includes a traversingarm 74 that is driven by a traverse driving motor such as a servo motor. In thetraversing device 70, the traversingarm 74 traverses theyarn 20 by performing a reciprocating swinging motion in a winding width direction of thepackage 30. Operation of the traverse driving motor is controlled by theunit controlling section 50. - Next, a configuration of the
cradle 23 is further explained in detail with reference toFIG. 3 . - As shown in
FIG. 3 , the windingunit body 16 includes arotating plate 17 that is rotatable around the pivotingshaft 48. Thecradle 23 can rotate integrally with therotating plate 17 around the pivotingshaft 48. Aspring 18 that is configured to act as a tension spring for gradually reducing the contact pressure and anair cylinder 60 are connected to therotating plate 17. A predetermined rotational torque can be applied to thecradle 23 by using thespring 18 and theair cylinder 60. - The
air cylinder 60 is driven by the compressed air. Theair cylinder 60 is configured as a double acting-type cylinder that includes apiston 601 therein. The compressed air of an air pressure P1 is supplied to a cylinder chamber that is located near to therotating plate 17 side of thepiston 601. The compressed air of an air pressure P2 is supplied to a cylinder chamber located away from the rotatingplate 17 side of thepiston 601. Asolenoid valve 61 is connected to a pipe that is provided to supply to theair cylinder 60 the compressed air of the air pressure P2. The air pressure P2 is controlled by thesolenoid valve 61 based on a control signal that is input by theunit controlling section 50. - In the configuration shown in
FIG. 3 , because, when the air pressure P2 decreases, a pulling force by which thecradle 23 is pulled by theair cylinder 60 increases, a torque required to rotate thecradle 23 around the pivotingshaft 48 toward a front side of the windingunit body 16 increases. Because thecontact roller 29 is arranged more on the front side of the windingunit body 16 than the pivotingshaft 48, the contact pressure between thepackage 30 and thecontact roller 29 can be increased by decreasing the air pressure P2. On the contrary, because, when the air pressure P2 increases, the pulling force by which thecradle 23 is pulled by theair cylinder 60 weakens, the torque required to rotate thecradle 23 around the pivotingshaft 48 toward a back side of the windingunit body 16 increases. Accordingly, it is possible to separate (lift up) thepackage 30 from a surface of thecontact roller 29. - Based on the configuration explained above, by causing the
cradle 23 to pivot, theair cylinder 60 can move thepackage 30. In other words, theair cylinder 60 can pivot thecradle 23 that holds thepackage 30 around the pivotingshaft 48 to move thepackage 30 between a position at which thepackage 30 is in contact with thecontact roller 29 and a position at which thepackage 30 separates from thecontact roller 29. Theair cylinder 60 is a moving section that moves thepackage 30. - An
angle sensor 44 that detects a rotation angle of the cradle 23 (a rotation angle of thecradle 23 around the pivoting shaft 48) is arranged on the pivotingshaft 48 of thecradle 23. Theangle sensor 44 is constituted by, for example, a rotary encoder, and transmits to theunit controlling section 50 an angle signal that corresponds to the rotation angle of thecradle 23. - As shown in
FIGS. 4A and 4B , because the rotation angle of thecradle 23 changes as thepackage 30 starts acquiring thickness because of the winding, the diameter of thepackage 30 can be grasped by detecting the rotation angle by using theangle sensor 44 at the time of a non-lift-up in which the lift up is not performed. Moreover, as shown inFIGS. 5A and6A , because the rotation angle of thecradle 23 changes in accordance with the lift-up amount (separation distance of thepackage 30 from the contact roller 29), the lift-up amount can be grasped by detecting the rotation angle by using theangle sensor 44 at the time of the lift-up. Therefore, by adding the lift-up amount to the diameter of thepackage 30 detected by theangle sensor 44 at the time of the non-lift-up, a position of the surface of thepackage 30 at the time of the lift-up can be grasped. In the present embodiment, theangle sensor 44 constitutes a surface position information acquiring section that acquires surface position information indicative of the position of the surface of thepackage 30, and the rotation angle of thecradle 23 corresponds to the surface position information. - Referring again to
FIG. 3 , theunit controlling section 50 controls the driving of the air cylinder (moving section) 60 and rotates thecradle 23, and controls the movement of thepackage 30 between the position at which thepackage 30 is in contact with thecontact roller 29 and the position at which thepackage 30 is separated from thecontact roller 29. Theunit controlling section 50 controls the catching operation of the loweryarn catching member 25 and the upper yarn catching member 26 (pivoting of the loweryarn pipe arm 33 and the upper yarn pipe arm 36). Theunit controlling section 50 controls the opening / closing of the shutters arranged in the loweryarn pipe arm 33 and the upperyarn pipe arm 36, and controls the generation of the suction current in the loweryarn suction port 32 and the upperyarn suction port 35 and stopping thereof. - Particularly, in the present embodiment, for example, when a yarn is cut when the
yarn monitoring device 15 detects the yarn defect, or when a yarn breaks during the unwinding of the yarn from the yarn supplying bobbin 21 (hereinafter "yarn cutting and the like"), theunit controlling section 50 controls the driving of theair cylinder 60 to rotate thecradle 23, lifts up thepackage 30 to the position at which thepackage 30 is separated from thecontact roller 29 to attain a separated state. In the separated state (at the time of the lift-up), based on the rotation angle detected by theangle sensor 44, theunit controlling section 50 controls the pivoting of the upperyarn pipe arm 36 so that the upperyarn suction port 35 moves up to a position at the predetermined distance from the surface of thepackage 30. The predetermined distance is stored in theunit controlling section 50. The predetermined distance can be a fixed value or a variable value. The predetermined distance is changeably set (can be changed as desired) by thesetting section 91. - Next, operation performed by the
unit controlling section 50 when the yarn cutting and the like occurs is explained in detail. - For example, when the yarn cutting and the like occurs during the winding operation, the
package driving motor 41 is controlled, and the normal rotation of thepackage 30 is slowed down and stopped. The driving of theair cylinder 60 is controlled, and thepackage 30 is lifted up. During the lift-up, the rotation angle of thecradle 23 is detected by theangle sensor 44, and the upperyarn pipe arm 36 is pivoted so that the upperyarn suction port 35 comes near thepackage 30 based on the detected rotation angle. Accordingly, the upperyarn suction port 35 moves to the position at the predetermined distance from the surface of thepackage 30 to be in the separated state. - As an example of a control performed to move the upper
yarn suction port 35, specifically, first, based on the rotation angle detected by theangle sensor 44 immediately before the lift-up, the position of the surface of thepackage 30 is grasped immediately before the lift-up. A rotational driving amount of the upperyarn pipe arm 36 that is required to move the upperyarn suction port 35 to the position at the predetermined distance from the surface of thepackage 30 immediately before the lift-up (hereinafter, "reference rotational driving amount") is calculated based on the grasped position of thepackage 30 surface. Subsequently, the lift-up amount is grasped based on the rotation angle detected by theangle sensor 44 at the time of the lift-up. A rotational driving amount further required for the upperyarn pipe arm 36 to maintain the approach when thepackage 30 is lifted up (hereinafter, "rotational driving amount to be increased") is calculated by using the grasped lift-up amount and a predetermined coefficient. Then, the upperyarn pipe arm 36 is pivoted by applying a driving amount calculated by adding the rotational driving amount to be increased to the reference rotational driving amount. As a result, even when the lift-up amount varies, the position of thepackage 30 surface can be tracked according to that lift-up amount, and the upperyarn suction port 35 can be moved to the position at the predetermined distance from the surface of thepackage 30. - Simultaneously with the movement of the upper
yarn suction port 35, the shutter of the upperyarn pipe arm 36 is opened and the suction current is generated in the upperyarn suction port 35. Simultaneously, thepackage driving motor 41 is controlled to start the reverse rotation of thepackage 30. Accordingly, the yarn end of thepackage 30 that is in the lift-up state and rotating reversely is caught by the upperyarn suction port 35 that is at the position at the predetermined distance from the surface of thepackage 30. - After the yarn end of the
package 30 is sucked and caught, by pivoting the upperyarn pipe arm 36, the upperyarn suction port 35 is moved toward the yarn joining position. Accordingly, the yarn end of thepackage 30 is guided to theyarn joining device 14, and the reverse rotation of thepackage 30 is slowed down and then stopped. Theyarn joining device 14 starts the yarn joining of the lower yarn caught by the loweryarn suction port 32 and the upper yarn caught by the upperyarn suction port 35. After the yarn joining is completed, the suction current that is flowing in the upperyarn suction port 35 is stopped by closing the shutter of the upperyarn pipe arm 36. - In such a configuration, because of various conditions (for example, contact pressure settings with respect to the
contact roller 29, unevenness of components among spindles, or time-dependent change), the lift-up amount may vary as shown inFIGS. 5A and6A . When such variation occurs, in thewinder unit 10, at the time of the lift-up, the upperyarn suction port 35 is moved based on the rotation angle of thecradle 23. Therefore, even when the lift-up amount varies, such variation can be tolerated (absorbed), and the upperyarn suction port 35 can be reliably moved to the position at the predetermined distance from the surface of thepackage 30 as shown inFIGS. 5B and6B . At the time of the lift-up, the upperyarn suction port 35 can come near thepackage 30 according to the lift-up amount, and an appropriate clearance with respect to thepackage 30 can be ensured. Because the lift-up amount is detected every time the lift-up is performed, effect of the variation in the lift-up amount can be suppressed. A yarn end finding position at which the yarn end of thepackage 30 is caught can be controlled more precisely. Therefore, according to thewinder unit 10, the yarn end of thepackage 30 can be caught reliably. Thus, yarn end finding efficiency and time efficiency can be improved, and the production efficiency, too, can be improved. - In the
winder unit 10, thecradle 23 is pivotable around the pivotingshaft 48. Theair cylinder 60 causes thecradle 23 to pivot around the pivotingshaft 48 so as to move thepackage 30 between the position at which thepackage 30 is in contact with thecontact roller 29 and the position at which thepackage 30 is separated from thecontact roller 29. As the surface position information indicative of the position of the surface of thepackage 30, the rotation angle of thecradle 23 is detected by theangle sensor 44. According to such a configuration, even if the lift-up amount varies, the lift-up amount can be accurately grasped based on the detection result of theangle sensor 44. Therefore, by causing the upperyarn suction port 35 to move based on the detection result of theangle sensor 44, the upperyarn suction port 35 can be reliably moved to the position at the predetermined distance from the surface of thepackage 30. - In the
winder unit 10, theair cylinder 60 is driven by the compressed air. In such a configuration, the responsiveness related to the lift-up can be increased. Moreover, in such a configuration, because variation in the lift-up amount tends to be significant, the effect explained above in which the yarn end of thepackage 30 can be reliably caught is particularly promising. - The
winder unit 10 includes thepackage driving motor 41 that rotationally drives thepackage 30. When catching the yarn end of thepackage 30 by using the upperyarn suction port 35 in the separated state, theunit controlling section 50 controls thepackage driving motor 41 so as to rotate thepackage 30 in the direction opposite to the winding direction. Accordingly, the yarn end of thepackage 30 can be caught more reliably. - In the
winder unit 10, the predetermined distance is changeably set by thesetting section 91. Accordingly, the predetermined distance can be set and changed as desired. In the present embodiment, the predetermined distance is a distance between the surface of thepackage 30 and the upperyarn suction port 35 that is lifted upward to perform sucking and catching. This distance can be stipulated as a minimum distance between any one end portion among the left and right end portions of thepackage 30 and an end portion of the upperyarn suction port 35 in the same orientation. Moreover, this distance can be stipulated as a minimum distance between a center of thepackage 30 in a width direction thereof and a center of the upperyarn suction port 35 in a width direction thereof. - Furthermore, in the
winder unit 10, because the diameter and the surface position of thepackage 30 can be grasped based on the rotation angle of thecradle 23 detected by theangle sensor 44, an optical-type fixed length device can be omitted. - Exemplary embodiments of the present invention are explained above. However, the present invention is not limited to the embodiments explained above.
- The above embodiments can include a warning section that outputs a warning based on the rotation angle detected by the
angle sensor 44 in the separated state (the surface position information acquired by the surface position information acquiring section). For example, if the rotation angle detected by theangle sensor 44 is larger than an upper limit threshold, or is smaller than a lower limit threshold, the variation of the rotation angles detected by theangle sensor 44 exceeds a predetermined range, and the like, time-dependent change in the lift-up amount can be grasped. Accordingly, by outputting the warning in such a case, attention can be called to that time-dependent change. It becomes possible to determine whether wearing out is present or maintenance is needed in any component such as theair cylinder 60 and the like. For example, as the warning section, an alarm device and the like that outputs an alarm can be used. As an example, when the rotation angle detected by theangle sensor 44 is smaller than the lower limit threshold, an alarm that indicates that the lift-up amount is insufficient can be generated. Alternatively, a message for the warning section can also be displayed on the displayingsection 92. In such a configuration, the displayingsection 92 operates as the warning section. - In the above embodiments, the
angle sensor 44 is included as the surface position information acquiring section; however, in addition to theangle sensor 44, the configuration can include a distance sensor that is arranged on the upperyarn suction port 35 and detects the distance up to the surface of thepackage 30 as the surface position information. For example, as shown inFIG. 7 , adistance sensor 81, which is an optical sensor and the like that emits light along an opening direction of the upperyarn suction port 35, is arranged on the upper yarn suction port 35 (in the figure, on a portion near the upperyarn suction port 35 of the upper yarn catching member 26). Thedistance sensor 81 detects the distance up to the surface of thepackage 30, and acquires the position of the surface of thepackage 30. According to such a configuration, even when the lift-up amount varies, the lift-up amount can be accurately grasped based on the detection result of thedistance sensor 81. By causing the upperyarn suction port 35 to move based on the detection result of thedistance sensor 81, the upperyarn suction port 35 can be reliably moved to the position at the predetermined distance from the surface of thepackage 30. Note that, the distance sensor is not particularly limited to a certain configuration, and various known distance sensors can be used. - In the above embodiments, the configuration in which the
package 30 is moved by theair cylinder 60 is cited as an example. However, a configuration in which thepackage 30 is moved by a hydraulic cylinder and the like can be used. In the above embodiments, theunit controlling section 50 controls the generation of the suction current in the upperyarn suction port 35 and stopping thereof by controlling the opening / closing operation of the shutter; however, the shutter can always be in an open state. In such a configuration, for example, it becomes possible to simplify the control performed by theunit controlling section 50. In the above embodiments, thepackage 30 is directly rotationally driven by thepackage driving motor 41; however, thecontact roller 29 can be driven and thepackage 30 can be rotated following the rotation of thecontact roller 29. - The method explained in the above embodiments to detect the diameter of the
package 30 at the time of non-lift-up is not limited to such method, and the diameter of thepackage 30 can be detected by using methods cited as an example below. As an example, a dedicated yarn speed sensor is arranged on the yarn traveling path to detect the traveling speed of theyarn 20. A winding angle is calculated by theunit controlling section 50 based on the traveling speed and the traversing speed of theyarn 20, and the circumferential speed of thepackage 30 is calculated based on the winding angle and the traveling speed of theyarn 20. Then, the diameter of thepackage 30 can be calculated based on the rotational speed of thepackage 30 and the circumferential speed of thepackage 30. Moreover, as another example, the diameter of thepackage 30 can be calculated based on the total length of theyarn 20 that is wound on thepackage 30, the winding speed of theyarn 20, and the type of the yarn 20 (thickness and the like). - In the above embodiments, at the time of the lift-up, after causing the
package 30 to perform the reverse rotation at once, thepackage 30 can be caused to perform the normal rotation, or after thepackage 30 is caused to perform the normal rotation at once, thepackage 30 can be caused to perform the reverse rotation. In the above embodiments, at the time of the lift-up, for a predetermined set time period, thepackage 30 can be caused to perform the normal rotation or the reverse rotation at a rotational speed at which the yarn end of thepackage 30 can be pulled away. In such configurations, the yarn end can be easily pulled away from thepackage 30. In the above embodiments, thesetting section 91 can be arranged in thewinder unit 10. - According to one aspect of the present invention, a yarn winding machine includes a holding section that rotatably holds a package; a contact section capable of contacting a surface of the package; a moving section capable of moving the package between a position at which the package is in contact with the contact section and a position at which the package is separated from the contact section; a yarn catching section capable of moving near or away from the surface of the package and catching a yarn end of the package; a surface position information acquiring section that acquires surface position information indicative of a position of the surface of the package; and a control section that controls a movement of the yarn catching section, and, in a separated state in which the package is separated from the contact section by the moving section, moves the yarn catching section near the surface of the package based on the surface position information acquired by the surface position information acquiring section so that a distance of the yarn catching section from the surface of the package is equal to a predetermined distance.
- In the above yarn winding machine, in the separated state (at the time of a lift-up) in which the package is separated from the contact section, the yarn catching section is moved based on the acquired surface position information. Therefore, even if the lift-up amount varies, the variation can be tolerated and the yarn catching section can be reliably moved to a position at the predetermined distance from the surface of the package. Therefore, the yarn end of the package can be reliably caught.
- In the above yarn winding machine, the holding section includes a pivoting shaft and is pivotable around the pivoting shaft. The moving section pivots the holding section around the pivoting shaft to move the package between the position at which the package is in contact with the contact section and the position at which the package is separated from the contact section. The surface position information acquiring section is an angle sensor that detects a rotation angle of the holding section around the pivoting shaft as the surface position information. With this configuration, even if the lift-up amount varies, the lift-up amount can be precisely grasped based on the detection result of the angle sensor. Therefore, by causing the yarn catching section to move based on the detection result of the angle sensor, the yarn catching section can be reliably moved to the position at the predetermined distance from the surface of the package.
- In the above yarn winding machine, the surface position information acquiring section can include a distance sensor that is attached to the yarn catching section and detects a distance thereof from the surface of the package as the surface position information. With this configuration, even when the lift-up amount varies, the lift-up amount can be precisely grasped based on the detection result of the distance sensor. Therefore, by causing the yarn catching section to move based on the detection result of the distance sensor, the yarn catching section can be reliably moved to the position at the predetermined distance from the surface of the package.
- In the above yarn winding machine, the moving section can be driven by compressed air. When the moving section is driven by the compressed air, the variation in the lift-up amount tends to be significant. Therefore, the effect explained above in which the yarn end of the package is reliably caught is particularly promising in such a configuration.
- The above yarn winding machine can include a package driving section that rotationally drives the package. The control section can control the package driving section to rotate the package in a direction opposite to a winding direction when catching the yarn end of the package by using the yarn catching section in the separated state. With this configuration, the yarn end of the package can be more reliably caught.
- The above yarn winding machine can include a warning section that outputs a warning based on the surface position information acquired by the surface position information acquiring section in the separated state. Based on the surface position information acquired by the surface position information acquiring section in the separated state, time-dependent change in the lift-up amount can be grasped. Therefore, by outputting a warning based on the surface position information acquired by the surface position information acquiring section in the separated state, attention can be called to that time-dependent change.
- The above yarn winding machine can include a setting section for setting and changing the predetermined distance. With this configuration, the predetermined distance can be set and changed as desired.
- According to the present invention, it is possible to provide a yarn winding machine capable of reliably catching a yarn end of a package.
- In the above explanation, the meaning of "a plurality of" also includes "a predetermined number of".
- Although the invention has been explained with respect to specific embodiments for a complete and clear disclosure, the appended claims are not to be thus limited but are to be construed as embodying all modifications and alternative constructions that may occur to one skilled in the art that fairly fall within the scope of the claims.
Claims (6)
- A yarn winding machine (10) comprising:a holding section (23) configured to rotatably hold a package (30);a contact section (29) capable of contacting a surface of the package (30);a moving section (60) capable of moving the package (30) between a position at which the package (30) is in contact with the contact section (29) and a position at which the package (30) is separated from the contact section (29);a yarn catching section (35) capable of moving near or away from the surface of the package (30) and catching a yarn end of the package (30);a surface position information acquiring section (44, 81) configured to acquire surface position information indicative of a position of the surface of the package (30); anda control section (50) configured to control a movement of the yarn catching section (35), and, in a separated state in which the package (30) is separated from the contact section (29) by the moving section (60), to move the yarn catching section (35) near the surface of the package (30) based on the surface position information acquired by the surface position information acquiring section (44, 81) so that a distance of the yarn catching section (35) from the surface of the package (30) is equal to a predetermined distance,whereinthe holding section (23) includes a pivoting shaft (48) and is pivotable around the pivoting shaft (48),the moving section (60) is configured to pivot the holding section (23) around the pivoting shaft (48) to move the package (30) between the position at which the package (30) is in contact with the contact section (29) and the position at which the package (30) is separated from the contact section (29), and characterised in thatthe surface position information acquiring section (44) is an angle sensor that is configured to detect a rotation angle of the holding section (23) around the pivoting shaft (48) as the surface position information.
- The yarn winding machine (10) as claimed in Claim 1, wherein the surface position information acquiring section (81) includes a distance sensor that is attached to the yarn catching section (35) and is configured to detect a distance thereof from the surface of the package (30) as the surface position information.
- The yarn winding machine (10) as claimed in Claim 1 or 2, wherein the moving section (60) is configured to be driven by compressed air.
- The yarn winding machine (10) as claimed in any one of Claims 1 to 3 comprising:a package driving section (41) configured to rotationally drive the package (30), whereinthe control section (50) is configured to control the package driving section (41) to rotate the package (30) in a direction opposite to a winding direction when catching the yarn end of the package (30) by using the yarn catching section (35) in the separated state.
- The yarn winding machine (10) as claimed in any one of Claims 1 to 4 comprising:
a warning section (92) configured to output a warning based on the surface position information acquired by the surface position information acquiring section (44, 81) in the separated state. - The yarn winding machine (10) as claimed in any one of Claims 1 to 5, comprising:
a setting section (91) for setting and changing the predetermined distance.
Applications Claiming Priority (1)
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JP2017169758A JP2019043737A (en) | 2017-09-04 | 2017-09-04 | Yarn winding machine |
Publications (2)
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EP3453662A1 EP3453662A1 (en) | 2019-03-13 |
EP3453662B1 true EP3453662B1 (en) | 2021-12-22 |
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EP18187840.6A Active EP3453662B1 (en) | 2017-09-04 | 2018-08-07 | Yarn winding machine |
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EP (1) | EP3453662B1 (en) |
JP (1) | JP2019043737A (en) |
CN (1) | CN109422136B (en) |
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JP2021011377A (en) * | 2019-07-09 | 2021-02-04 | 村田機械株式会社 | Yarn winding machine and method of yarn winding |
CN110983523B (en) * | 2019-12-19 | 2021-01-05 | 西门子工厂自动化工程有限公司 | Spindle diameter calculation method, spindle diameter calculation device, storage medium, and electronic device |
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JPH01231771A (en) * | 1988-03-11 | 1989-09-18 | Toray Eng Co Ltd | Method for changing yarn of turret type wind-up machine |
US5170953A (en) * | 1988-08-12 | 1992-12-15 | Hans Stahlecker | Servicing apparatus which can be moved along a spinning machine and has devices for seeking a yarn end from a spool package |
DE3827345A1 (en) * | 1988-08-12 | 1990-03-01 | Fritz Stahlecker | Servicing appliance movable along a spinning machine and having means for locating a thread of a bobbin |
DE19650933A1 (en) * | 1996-12-07 | 1998-06-10 | Schlafhorst & Co W | Winding unit of a textile machine producing cross-wound bobbins |
JP2003095539A (en) * | 2001-09-27 | 2003-04-03 | Murata Mach Ltd | Suction member for capturing/guiding thread strip, and thread strip winder |
DE10206288A1 (en) * | 2002-02-15 | 2003-08-28 | Schlafhorst & Co W | Textile machine work-station for cross-wound bobbin, has support roller and bobbin swivel arm lifted during break repair |
CZ304394B6 (en) * | 2005-04-27 | 2014-04-16 | Rieter Cz S.R.O. | Method of searching the yarn end on bobbin of the textile machine with an individual drive of live roller of winding mechanism and a service device to carry out the method |
DE102006026548A1 (en) * | 2006-06-08 | 2007-12-13 | Oerlikon Textile Gmbh & Co. Kg | Method for operating a workstation of a creel-producing textile machine |
DE202007011864U1 (en) * | 2007-08-25 | 2007-10-25 | Oerlikon Textile Gmbh & Co. Kg | Apparatus for operating the jobs of cheese-making textile machines |
JP2010013259A (en) | 2008-07-04 | 2010-01-21 | Murata Mach Ltd | Yarn-winding machine and displacement control method of cradle |
JP2011042449A (en) * | 2009-08-21 | 2011-03-03 | Murata Machinery Ltd | Winding unit and yarn winder |
DE102011008298A1 (en) * | 2011-01-11 | 2012-07-12 | Oerlikon Textile Gmbh & Co. Kg | Method for adjusting swivel path of thread feeder arranged at thread splicing apparatus of cross wound bobbin producing textile machine in textile industry, involves detecting consideration during swivel process of correction factor |
JP2012218922A (en) * | 2011-04-13 | 2012-11-12 | Murata Machinery Ltd | Yarn winding apparatus and yarn withdrawal method |
JP2014108845A (en) * | 2012-11-30 | 2014-06-12 | Murata Mach Ltd | Yarn winding machine |
JP2014108844A (en) * | 2012-11-30 | 2014-06-12 | Murata Mach Ltd | Yarn winder and yarn drawing-out method |
DE102013004053A1 (en) * | 2013-03-08 | 2014-09-11 | Saurer Germany Gmbh & Co. Kg | Method for operating a workstation of a textile machine producing textile cheeses or associated workstation |
DE102013009653A1 (en) * | 2013-06-08 | 2014-12-11 | Saurer Germany Gmbh & Co. Kg | Method for setting a rotational angular position of a coil frame rotatably supporting a coil frame and a spool-producing textile machine with a plurality of winding units |
JP2016204062A (en) * | 2015-04-16 | 2016-12-08 | 村田機械株式会社 | Textile machine |
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2017
- 2017-09-04 JP JP2017169758A patent/JP2019043737A/en active Pending
-
2018
- 2018-08-07 EP EP18187840.6A patent/EP3453662B1/en active Active
- 2018-08-31 CN CN201811009003.6A patent/CN109422136B/en active Active
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CN109422136A (en) | 2019-03-05 |
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CN109422136B (en) | 2021-12-10 |
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