EP4357285A1 - Garnwickelmaschine - Google Patents

Garnwickelmaschine Download PDF

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Publication number
EP4357285A1
EP4357285A1 EP23203981.8A EP23203981A EP4357285A1 EP 4357285 A1 EP4357285 A1 EP 4357285A1 EP 23203981 A EP23203981 A EP 23203981A EP 4357285 A1 EP4357285 A1 EP 4357285A1
Authority
EP
European Patent Office
Prior art keywords
yarn
storage
lap
storage roller
winding machine
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.)
Pending
Application number
EP23203981.8A
Other languages
English (en)
French (fr)
Inventor
Tatsuo Jinyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Machinery Ltd
Original Assignee
Murata Machinery Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Murata Machinery Ltd filed Critical Murata Machinery Ltd
Publication of EP4357285A1 publication Critical patent/EP4357285A1/de
Pending legal-status Critical Current

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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
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B65H51/22—Reels or cages, e.g. cylindrical, with storing and forwarding surfaces provided by rollers or bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/04—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to excessive tension or irregular operation of apparatus
    • 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.
  • JP2016-050053A discloses a yarn storage device including a storage roller disposed in the yarn running path from the yarn feeding bobbin to the winding portion of the yarn winding machine, so as to temporarily store the yarn by winding the yarn around an outer periphery surface of the storage roller.
  • the quantity of the yarn or tension applied to the yarn wound around the storage roller is not always constant but varies depending on various factors such as replacement of the yarn feeding bobbin, non-uniformity of the yarn, or a package formation state. If the quantity of the yarn or tension applied to the yarn wound around the storage roller varies, the yarn wound around the storage roller may generate a lap-wound part. If the lap-wound part is generated, the tension applied to the yarn becomes non-uniform, and unwinding of the yarn from the storage roller cannot proceed regularly, or a stress is applied to the yarn, which may cause uneven thickness of the yarn, breakage of the yarn, or other malfunctions.
  • the yarn winding machine of a first aspect of the present disclosure includes:
  • the yarn winding machine of the first aspect can automatically detect the lap-wound part of the yarn, and hence it is possible to take measures such as eliminating the lap-wound part of the yarn. Therefore, it is possible to take measures before tension applied to the yarn becomes abnormally large, so that productivity of the yarn winding machine can be improved, and that occurrence of a defective part of the yarn can be avoided.
  • the yarn winding machine of a second aspect of the present disclosure is the yarn winding machine of the first aspect, wherein
  • the yarn winding machine of the second aspect can detect that a lap-wound part is generated is made by a simple method, and hence it is possible to easily take measures before tension applied to the yarn becomes abnormally large, productivity of the yarn winding machine is improved, and occurrence of a defective part of the yarn can be suppressed.
  • the yarn winding machine of a third aspect of the present disclosure is the yarn winding machine of the first aspect, wherein
  • a displacement amount (the lowering amount) of the storage upstream end position from the reference position to an upstream side is a predetermined amount or more, it is determined that the lap-wound part is generated. If the displacement amount (the lowering amount) is less than the predetermined amount, it is determined that the lap-wound part is not generated.
  • the yarn winding machine of the third aspect can detect that the lap-wound part is generated by a simple method.
  • the yarn winding machine of a fourth aspect of the present disclosure is the yarn winding machine of the third aspect, and further includes a yarn splicing device disposed between the feeding portion and the storage roller in the yarn running path.
  • the reference position is defined as the storage upstream end position of the yarn detected by the detection device during a stable period while the yarn winding machine is stably winding the yarn, which is a period between splicing and next splicing by the yarn splicing device.
  • the control portion updates the reference position at least every new stable period. The determination whether or not the lap-wound part is generated is made using the reference position just before the determination.
  • the yarn winding machine of a fourth aspect defines the reference position of the storage upstream end position of the yarn, as the storage upstream end position of the yarn detected during the stable period while the yarn winding machine is stably winding the yarn, which is the period between splicing and next splicing, and hence frequency of false detection of the lap-wound part can be reduced.
  • the reference position is updated every stable period, and the determination whether or not the lap-wound part is generated is made using the reference position just before the determination. Therefore, more accurate determination can be made.
  • the yarn winding machine of a fifth aspect of the present disclosure is the yarn winding machine of any one of the first to fourth aspects, wherein when the control portion determines that the lap-wound part is generated in the storing area, it performs a lap-wound part eliminating operation, in which rotation speed of the storage roller is changed from that in a normal winding operation, and the lap-wound part is eliminated.
  • the yarn winding machine of the fifth aspect performs the lap-wound part eliminating operation, and hence it can eliminate the lap-wound part. Therefore, it is possible to take measures before tension applied to the yarn becomes abnormally large, so that productivity of the yarn winding machine can be improved, and that occurrence of a defective part of the yarn can be suppressed.
  • the yarn winding machine of a sixth aspect of the present disclosure is the yarn winding machine of the fifth aspect, and further includes a suction mechanism for sucking the yarn wound around the storing area from the storage upstream end position, wherein when the control portion determines that the lap-wound part is generated in the storing area, it performs a first lap-wound part eliminating operation, in which the storage roller is rotated reversely for a predetermined period of time, and the yarn wound around the storing area is sucked and eliminated from the storage upstream end position.
  • the yarn winding machine of the sixth aspect sucks and eliminates the yarn wound around the storing area from the storage upstream end position, and hence the lap-wound part can be eliminated with relatively high probability. Therefore, it is possible to take measures before tension applied to the yarn becomes abnormally large, so that productivity of the yarn winding machine can be improved, and that occurrence of a defective part of the yarn can be suppressed.
  • the yarn winding machine of a seventh aspect of the present disclosure is the yarn winding machine of the sixth aspect, wherein the control portion performs a normal yarn winding operation after the first lap-wound part eliminating operation, and if it determines again that the lap-wound part is generated in the storing area, it further performs a second lap-wound part eliminating operation, in which the storage roller is rotated reversely for a predetermined period of time, and the yarn wound around the storing area is sucked and eliminated from the storage upstream end position.
  • the yarn winding machine of the seventh aspect further performs the second lap-wound part eliminating operation if the lap-wound part is generated after the first lap-wound part eliminating operation, and hence the lap-wound part can be eliminated with higher probability.
  • the yarn winding machine of an eighth aspect of the present disclosure is the yarn winding machine of any one of the first to seventh aspects, and further includes a tension applying portion for applying a predetermined tension to the yarn between the feeding portion and the yarn storage device, wherein
  • the yarn winding machine of the eighth aspect prevents the tension from changing suddenly before and after replacing the yarn feeding bobbin, and avoids occurrence of the lap-wound part.
  • the yarn winding machine of a ninth aspect of the present disclosure is the yarn winding machine of the eighth aspect, and further includes a tension sensor for detecting tension of the yarn, wherein before and after replacing the yarn feeding bobbin, the control portion measures the tension on the yarn inlet side to the storing area using the tension sensor, and controls the tension applying portion so that the tension just after replacing the yarn feeding bobbin is substantially the same as the tension just before replacing the yarn feeding bobbin.
  • the yarn winding machine of the ninth aspect prevents the tension from changing suddenly before and after replacing the yarn feeding bobbin, and avoids occurrence of the lap-wound part.
  • the yarn winding machine of a tenth aspect of the present disclosure is the yarn winding machine of any one of the first to eighth aspects, wherein the detection device includes a line sensor for detecting the yarn in a direction parallel to a rotation axis of the storage roller in the storing area.
  • the yarn winding machine of the tenth aspect can detect that the lap-wound part is generated, by a simple method using the line sensor.
  • the yarn winding machine of an eleventh aspect of the present disclosure is the yarn winding machine of any one of the first to ninth aspects, wherein the detection device includes a camera for capturing an image of the yarn in the storing area.
  • the yarn winding machine of the eleventh aspect can detect that the lap-wound part is generated, by a simple method using the camera.
  • the yarn winding machine of a twelfth aspect of the present disclosure is the yarn winding machine of any one of the first to ninth aspects, wherein the detection device includes a plurality of light emitting and receiving sensors for detecting the yarn in the storing area.
  • the yarn winding machine of the twelfth aspect can detect that the lap-wound part is generated, by a simple method using the light emitting and receiving sensors.
  • the yarn winding machine of a thirteenth aspect of the present disclosure is the yarn winding machine of any one of the first to eleventh aspects, wherein the yarn storage device is configured so that the yarn on a downstream side of the storing area is pushed by the yarn on the upstream side to move to the downstream side.
  • the yarn winding machine of the thirteenth aspect is configured so that the yarn on a downstream side of the storing area is pushed by the yarn on the upstream side to move to the downstream side, and hence it is highly possible to cause disorder in sending the yarn due to occurrence of the lap-wound part.
  • the yarn winding machine of a fourteenth aspect of the present disclosure is the yarn winding machine of any one of the first to sixth aspects, and further includes an air spinning apparatus.
  • the yarn winding machine of a fifteenth aspect of the present disclosure is the yarn winding machine of any one of the first to sixth aspects, wherein the yarn winding machine is an open-end spinning machine.
  • the yarn winding machine of the present disclosure can automatically detect the lap-wound part of the yarn, and hence it can take measures such as eliminating the lap-wound part of the yarn. Therefore, it is possible to take measures before tension applied to the yarn becomes abnormally large, so that productivity of the yarn winding machine can be improved, and that occurrence of a defective part of the yarn can be avoided.
  • an automatic winder 1 of this embodiment includes a plurality of winder units (yarn winding machines) 2 arranged next to each other, a machine control device 3, a yarn feeding bobbin supply device 4, a doffing device 5, and a not-shown blower box.
  • the machine control device 3 is configured to be capable of communicating to each winder unit 2.
  • An operator of the automatic winder 1 can centrally manage the plurality of winder units 2 by appropriately operating the machine control device 3.
  • the machine control device 3 controls operations of the yarn feeding bobbin supply device 4 and the doffing device 5.
  • the yarn feeding bobbin supply device 4 sets a yarn feeding bobbin 21 one by one on a transport tray 26.
  • the yarn feeding bobbin supply device 4 supplies the yarn feeding bobbin 21 set on the transport tray 26 to each of the plurality of winder units 2.
  • the doffing device 5 moves to a position of the winder unit 2, and detaches the full package 30.
  • the doffing device 5 sets a take-up bobbin 22 without the yarn Y to the winder unit 2 from which the package 30 was removed.
  • the winder unit 2 includes a yarn feeding portion (feeding portion) 6, a yarn storage device 40 (yarn accumulating device), a detection device 50, a cover 47 ( Fig. 4 ), a package forming portion (winding portion) 8, a wax applying device 70, and a control portion 25.
  • the winder unit 2 unwinds the yarn Y of the yarn feeding bobbin 21 in the yarn feeding portion 6, and temporarily stores the unwound yarn Y in the yarn storage device 40.
  • the package forming portion 8 pulls out the yarn Y stored in the yarn storage device 40 and winds the same around the take-up bobbin 22 so as to form the package 30.
  • the yarn feeding portion 6 is configured to support the yarn feeding bobbin 21 set on the transport tray 26 at a predetermined position, and to be capable of unwinding the yarn Y from the yarn feeding bobbin 21. When all the yarn Y is unwound from the yarn feeding bobbin 21, the yarn feeding portion 6 discharges a core tube of the yarn feeding bobbin 21 without the yarn Y, and receives a new yarn feeding bobbin 21 supplied from the yarn feeding bobbin supply device 4.
  • the yarn storage device 40 is disposed in a yarn running path formed between the yarn feeding portion 6 and the package forming portion 8.
  • the yarn storage device 40 is disposed at a position on an upstream side of the wax applying device 70 in the running direction of the yarn Y
  • the yarn storage device 40 takes up the yarn Y unwound by the yarn feeding portion 6 and temporarily stores the same.
  • the yarn storage device 40 feeds the stored yarn Y to the package forming portion 8.
  • the yarn storage device 40 includes a storage roller 41 around which the yarn Y can be wound, a drive motor 45 that drives the storage roller 41 to rotate, and the cover 47.
  • the storage roller 41 takes up the yarn Y around a storing area A on an outer periphery surface 41d of the storage roller 41, so as to temporarily store the yarn Y
  • the storage roller 41 is supported by a machine base (frame) of the automatic winder 1, in a rotatable manner about a rotation axis C1 a little inclined from the horizontal direction.
  • both end sides of the storage roller 41 in an axial direction are provided with tapered parts 41a and 41b, respectively, in each of which a diameter thereof becomes larger as being closer to the end edge.
  • the part between the two tapered parts 41a and 41b is a cylindrical part 41c having a uniform diameter, and the outer periphery surface 41d thereof is the storing area A around which the yarn Y is wound.
  • the outer periphery surface 41d of the cylindrical part 41c is mirror finished.
  • the two tapered parts 41a and 41b on the both end sides prevent the yarn Y wound around the cylindrical part 41c from dropping off.
  • a ring member 42 is wound around the outer periphery surface 41d of the cylindrical part 41c of the storage roller 41.
  • the ring member 42 is constituted of a ring-shaped rubber, for example.
  • the ring member 42 is attached to a boundary between the cylindrical part 41c and the tapered part 41b on the distal end side.
  • the ring member 42 is a tension ring that surrounds the yarn Y pulled out from the storage roller 41 by the package forming portion 8, and contacts with the yarn Y so as to give resistance to the same.
  • the ring member 42 is attached to the cylindrical part 41c by its elasticity to contract in a radial direction.
  • the ring member 42 gives resistance to the yarn Y pulled out from the storage roller 41 by its elasticity.
  • the ring member 42 gives moderate tension to the yarn Y pulled out from the storage roller 41, so that unwinding of the yarn Y from the storage roller 41 can be stabilized.
  • a region covering the attached position of the ring member 42 in the direction along the rotation axis C1 is provided with a first recess (recess) 43a.
  • the first recess 43a is formed to pass and cross the attached position of the ring member 42, and a part of the first recess 43a overlaps the attached position.
  • the first recess 43a is a groove extending from one end to the other end of the storage roller 41 in the direction along the rotation axis C1.
  • the first recess 43a has a uniform cross-sectional shape in its longitudinal direction, which is a substantially rectangular shape.
  • the outer periphery surface 41d of the storage roller 41 is further provided with a second recess (recess) 43b.
  • the second recess (recess) 43b is a recess (so-called downgage) to prevent a depression (so-called sink mark), which may be formed when molding a boss for embedding a magnet for sensor or a rib for reinforcement on an inner periphery surface 41g of the cylindrical part 41c.
  • the drive motor 45 rotates the storage roller 41 in a winding direction of the yarn Y from the yarn feeding portion 6. In addition, the drive motor 45 can also rotate the storage roller 41 in a direction opposite to the winding direction.
  • the drive motor 45 is a position controllable motor such as a DC brushless motor, a stepping motor, or a servo motor.
  • a downstream yarn blow-off portion 80 In a vicinity of the tapered part 41a on the one end side of the storage roller 41 (the upstream side of the storage roller 41), there is disposed a downstream yarn blow-off portion 80.
  • the downstream yarn blow-off portion 80 is disposed near the outer periphery surface 41d of the storage roller 41. In normal winding operation of the yarn, the yarn on the yarn feeding portion 6 side passes through the downstream yarn blow-off portion 80 and is guided to the tapered part 41a on one end side of the storage roller 41.
  • the yarn Y guided to the tapered part 41a on one end side of the storage roller 41 by the downstream yarn blow-off portion 80 is sequentially wound from one end side (upstream side) of the cylindrical part 41c, while pushing up the former yarn layer.
  • the yarn Y that has been wound around the outer periphery surface 41d of the storage roller 41 is pushed by the yarn Y that is newly wound and sent to the other end side (downstream side) sequentially.
  • the yarn Y is aligned in a helicoidal manner and is wound regularly from the one end side to the other end side.
  • the yarn Y wound around the storage roller 41 is pulled out from the tapered part 41b on the other end side of the storage roller 41 (the downstream side of the storage roller 41), and is sent to the downstream side (the package forming portion 8 side).
  • the yarn Y on the storage roller 41 is pulled out to the downstream side via a pull-out guide 37 positioned on an extension line of the rotation axis C1 of the storage roller 41.
  • the yarn Y wound around the storage roller 41 is unwound between itself and the ring member 42. In this way, the unwound yarn Y is given a moderate tension.
  • the package forming portion 8 includes a cradle 23 to which the take-up bobbin 22 can be attached, and a traverse drum 24 that drives the take-up bobbin 22 while traversing the yarn Y
  • the package forming portion 8 constitutes the winding portion.
  • the cradle 23 supports the take-up bobbin 22 (or the package 30) in a rotatable manner.
  • the cradle 23 is configured to be capable of making contact between an outer periphery surface of the supported package 30 and an outer periphery surface of the traverse drum 24.
  • the traverse drum 24 is driven to rotate by a not-shown drive source (such as an electric motor), in a state contacting with the outer periphery surface of the take-up bobbin 22 or the package 30, so that the take-up bobbin 22 is driven to rotate. In this way, it is possible to unwind and pull out the yarn Y stored in the yarn storage device 40, and to take up the same around the take-up bobbin 22.
  • the outer periphery surface of the traverse drum 24 is provided with a not-shown traversing groove, and this traversing groove enables the yarn Y to be traversed at a predetermined width. With the structure described above, the yarn Y is traversed and taken up around the take-up bobbin 22, so that the package 30 having a predetermined shape can be formed.
  • the wax applying device 70 is disposed between the yarn storage device 40 and the package forming portion 8.
  • the wax applying device 70 applies wax to the yarn Y running from the yarn storage device 40 to the package forming portion 8.
  • the winder unit 2 includes various devices disposed in the yarn running path from the yarn feeding portion 6 to the package forming portion 8 via the yarn storage device 40. Specifically, in the yarn path (the yarn running path) of the yarn Y, in order from the yarn feeding portion 6 on the upstream side to the yarn storage device 40 on the downstream side, there are disposed an unwind assist device 10, a lower yarn feeler 11, a tension applying portion 12, a catching device 13, a yarn splicing device 14, a yarn monitoring device 16, and the downstream yarn blow-off portion 80.
  • the unwind assist device 10 assists unwinding of the yarn Y by allowing a moving member 27 to contact with a balloon formed above the yarn feeding bobbin 21 when the yarn Y unwound from the yarn feeding bobbin 21 is swung, so as to appropriately control a size of the balloon.
  • the lower yarn feeler 11 is disposed at a position near the unwind assist device 10 on the downstream side of the unwind assist device 10.
  • the lower yarn feeler 11 defines presence or absence of the yarn Y fed from the unwind assist device 10.
  • the tension applying portion 12 applies a predetermined tension to the running yarn Y
  • the tension applying portion 12 applies a predetermined tension to the running yarn Y
  • the tension applying portion 12 has a gate structure in which movable comb teeth are disposed against fixed comb teeth, and the yarn Y runs through the comb teeth so as to be applied with a predetermined resistance.
  • the movable comb teeth are configured to be capable of being moved by a solenoid so that the teeth are engaged or released. In this way, the tension applying portion 12 can adjust the tension to be applied to the yarn Y
  • the structure of the tension applying portion 12 is not particularly limited, and may be a disc type tension applying portion, for example.
  • the catching device 13 is disposed on the downstream side of the tension applying portion 12.
  • the catching device 13 includes a first catching portion 13A and a second catching portion 13B.
  • the first catching portion 13A and the second catching portion 13B are integrated and constitute one component.
  • Each of the first catching portion 13A and the second catching portion 13B is connected to a not-shown negative-pressure source.
  • the first catching portion 13A is constituted as a cylindrical member having an open distal end.
  • the first catching portion 13A generates a suction airflow when performing yarn splicing, so as to suck and catch the yarn Y on the yarn storage device 40 side.
  • the second catching portion 13B is constituted as a cylindrical member having an open distal end.
  • the second catching portion 13B is disposed to be capable of swinging.
  • the second catching portion 13B swings between a catching position (first position) for catching the yarn Y fed from the unwind assist device 10 (a position shown by a solid line in Fig. 2 ), and a guiding position (second position) for guiding the yarn Y to the yarn splicing device 14 (a position shown by a broken line in Fig. 2 ).
  • the catching position may be a waiting position of the second catching portion 13B.
  • the second catching portion 13B is close to the yarn path on the downstream side of the lower yarn feeler 11, and in this state, generates a suction airflow on the distal end side thereof, so as to suck and catch the end of the yarn from the yarn feeding bobbin 21.
  • the second catching portion 13B sucks and catches the end of the cut yarn Y on the yarn feeding bobbin 21 side.
  • the second catching portion 13B may be configured to generate the suction airflow on the distal end side, so as to suck and remove fluff or the like adhered to the running yarn Y
  • an assist blow-off portion 28 that blows off the end of the yarn to a position on the downstream side of the lower yarn feeler 11 (to the distal end of the second catching portion 13B), if it is just after the yarn feeding bobbin 21 has been newly supplied to the yarn feeding portion 6 when the second catching portion 13B catches the yarn Y
  • the assist blow-off portion 28 ejects compressed air into the transport tray 26 and the yarn feeding bobbin 21, which have hollow shapes, so as to form an airflow at the distal end of the yarn feeding bobbin 21, which blows off the yarn Y of the yarn feeding bobbin 21 to the lower yarn feeler 11 side.
  • the assist blow-off portion 28 operates so that the end of the yarn on the yarn feeding bobbin 21 side can be securely sent to the lower yarn feeler 11 side.
  • the yarn splicing device 14 splices the disconnected yarn Y
  • the yarn splicing device 14 splices the yarn Y on the yarn feeding bobbin 21 side and the yarn Y on the yarn storage device 40 side, when the yarn Y is disconnected between the yarn feeding bobbin 21 and the yarn storage device 40, such as when the yarn monitoring device 16 detects a defect of the yarn and the cutter 15 cuts the yarn Y, or when the yarn Y during being unwound from the yarn feeding bobbin 21 breaks, or when the yarn feeding bobbin 21 is replaced.
  • the yarn splicing device 14 is disposed at a position a little apart from the yarn path.
  • the yarn splicing device 14 splices the caught ends of the yarn so that the yarn Y can be continuous.
  • the yarn monitoring device 16 monitors thickness or the like of the yarn Y using an appropriate sensor, so as to detect a defect of the yarn such as mixing of slab or a foreign object.
  • the cutter 15 is disposed at a position near the yarn monitoring device 16 on the upstream side of the yarn monitoring device 16. When the yarn monitoring device 16 detects a defect of the yarn, the cutter 15 promptly cuts the yarn Y
  • the cutter 15 and the yarn monitoring device 16 are housed in a common housing 19.
  • the housing 19 that houses the yarn monitoring device 16 is disposed on the downstream side of the yarn splicing device 14.
  • the downstream yarn blow-off portion 80 is an air sucker device disposed at a position near the yarn storage device 40 on the upstream side of the yarn storage device 40.
  • the downstream yarn blow-off portion 80 ejects compressed air so as to form an airflow that blows off the end of the yarn after sucking the same on the yarn storage device 40 side in the storing area A of the storage roller 41, and sends the same to the first catching portion 13A.
  • the downstream yarn blow-off portion 80 is equipped with an elongated cylindrical guide member (not shown) through which the yarn Y can pass, and a yarn guiding member 60 that is a curved cylindrical member.
  • An ejection port for the yarn Y is formed at one end of the guide member.
  • the yarn guiding member 60 is disposed adjacent to the ejection port of the downstream yarn blow-off portion 80.
  • An opening is formed at each end of the yarn guiding member 60 in the longitudinal direction.
  • the yarn guiding member 60 is disposed in a state where its opening on one end side faces the ejection port of the downstream yarn blow-off portion 80, while its opening on the other end side faces the first catching portion 13A.
  • a guide path is formed inside the yarn guiding member 60. The guide path connects the openings on both ends of the yarn guiding member 60 while detouring the yarn monitoring device 16, the yarn splicing device 14, and the like.
  • the downstream yarn blow-off portion 80, the yarn guiding member 60, and the first catching portion 13A constitute a storing side yarn end catching device 75.
  • the downstream yarn blow-off portion 80 catches the yarn Y on the yarn storage device 40 side, blows off the same to the guide path of the yarn guiding member 60, and pulls out the yarn Y along the guide path, so that the first catching portion 13A can catch it.
  • the yarn guiding member 60 has a not-shown penetrating slit formed over the entire length thereof, and hence the yarn Y can be pulled out from the inside of the yarn guiding member 60 in the state where the yarn Y is caught by the first catching portion 13A.
  • the downstream yarn blow-off portion 80 blows off the yarn Y on the yarn storage device 40 side and can guide the same to the yarn splicing device 14 side.
  • Each winder unit 2 is equipped with the control portion 25.
  • the control portion 25 includes not-shown hardware such as a CPU, a ROM, a RAM, and the like.
  • the RAM stores software such as a control program.
  • the control portion 25 controls individual structures of the winder unit 2 by cooperation between the hardware and the software.
  • the control portion 25 is configured to be capable of communicating with the machine control device 3. In this way, the machine control device 3 can centrally manage operations of the plurality of winder units 2 of the automatic winder 1.
  • the detection device 50 includes a detection portion 53 and a light emission portion 55.
  • the detection portion 53 and the light emission portion 55 are housed in a casing 51, which is fixed to the machine base of the automatic winder 1.
  • the detection portion 53 detects the yarn Y wound around the outer periphery surface 41d of the storage roller 41.
  • the detection portion 53 is disposed near the outer periphery surface 41d of the cylindrical part 41c of the storage roller 41. For instance, the detection portion 53 can detect that the yarn Y of the storage roller 41 has become a predetermined upper limit amount or more, and that it has become less than a predetermined lower limit amount.
  • the detection portion 53 may have a detection range from the upper limit amount to the lower limit amount. Note that the detection range may be a wider range including a part above the upper limit amount and a part below the lower limit amount. In this way, for example, it is possible to detect an excess amount above the upper limit amount.
  • the control portion 25 controls the drive motor 45 so that a storage amount (wound amount) of the storage roller 41 becomes within the upper limit amount and the lower limit amount.
  • the detection portion 53 includes a line sensor 53A, which detects presence or absence of the yarn Y in a straight section S1 connecting an upstream side end 41f and a downstream side end 41e in the running direction of the yarn Y, in the storing area A formed on the outer periphery surface 41d of the cylindrical part 41c, and a lens 53B for condensing incident light.
  • the line sensor 53A is, for example, a CCD image sensor or a CMOS image sensor, which obtains light quantity using photodiodes arranged in a line.
  • the line sensor 53A receives light through the lens 53B that condenses incident light.
  • the line sensor 53A is disposed so that the extending direction of the straight section S1 becomes parallel to the extending direction of the rotation axis C1.
  • the light emission portion 55 includes two light sources 55B and 55B, and an optical waveguide 55C that converts the light emitted from the two light sources 55B and 55B into surface-emitting light, and emits the light to the storage roller 41.
  • an optical waveguide 55C As a structural element of the optical waveguide 55C, a diffuser panel such as an acrylic panel for guiding light is included.
  • the two light sources 55B and 55B are, for example, light emitting diodes (LEDs), and are disposed on an LED substrate 55A. Note that the number of the light sources is not limited to two.
  • the line sensor 53A is disposed at a position such that the light emitted from the light emission portion 55 and reflected by the outer periphery surface 41d of the storage roller 41 does not enter it, and that the light emitted from the light emission portion 55 and reflected by the yarn Y stored on the storage roller 41 enters it.
  • the light emission portion 55 emits light at an emission angle ⁇ in a range of 0 to 30 degrees as illustrated in Fig. 4(C) .
  • line sensor 53A is disposed at a position such that the light emitted from the light emission portion 55 and reflected by the outer periphery surface 41d of the storage roller 41 does not enter it" means that the light emitted from the light emission portion 55 at the above-mentioned angle is totally reflected by the outer periphery surface 41d of the storage roller 41, and that the line sensor 53A is disposed at a position such that the reflected light does not enter it.
  • a first straight line L1 is imaginarily set, which is one of straight lines perpendicular to the rotation axis C1
  • a second straight line L2 is imaginarily set, which is one of straight lines parallel to the first straight line L1 and contacting with the outer periphery surface 41d of the storage roller 41.
  • the light emission portion 55 is disposed on the first straight line L1 or between the line sensor 53A and the first straight line L1 in the arrangement direction of the first straight line L1 and the second straight line L2.
  • the light emission portion 55 can emit light to a part of the storage roller 41 positioned between the first straight line L1 and the second straight line L2.
  • the line sensor 53A is disposed between the second straight line L2 and the first straight line L1.
  • a light receiving direction of the line sensor 53A is substantially parallel to the first straight line L1.
  • the line sensor 53A receives light from a direction substantially parallel to the first straight line L1.
  • the cover 47 is disposed in an area opposite to the side where the first straight line L1 is disposed with respect to the second straight line L2, in the arrangement direction of the first straight line L1 and the second straight line.
  • the cover 47 is disposed to face a part of the outer periphery surface 41d of the storage roller 41.
  • the cover 47 is disposed to cover at least a part of the propagation direction of the light emitted from the light emission portion 55 and reflected by the outer periphery surface 41d of the storage roller 41.
  • the cover 47 may be disposed to cover also at least a part of propagation directions of light that is emitted from the light emission portion 55 and is not reflected by the outer periphery surface 41d of the storage roller 41.
  • At least a part of an opposing surface 47a of the cover 47, to which light from the light emission portion 55 enters, is formed with a color (such as black color) having low light reflectance.
  • the periphery of the yarn storage device 40 it may be possible to configure the periphery of the yarn storage device 40, so that there is no structure that may reflect light from the light emission portion 55 to the light receiving direction of the line sensor 53A, without disposing the cover 47. Even if there is a structure that reflects light from the light emission portion 55 to the light receiving direction of the line sensor 53A, if it is disposed at a position such that the reflected light is sufficiently attenuated when reaching the line sensor 53A, it is possible to prevent the phenomenon that light reflected from the yarn Y cannot be detected appropriately.
  • the control portion 25 of this embodiment determines presence or absence of the yarn Y on the outer periphery surface 41d of the storage roller 41 (in the storing area A).
  • the control portion 25 determines presence or absence of the yarn Y on the outer periphery surface 41d, on the basis of a detection result by the line sensor 53A.
  • Fig. 5(A) is a development view of the outer periphery surface of the storage roller 41 developed two-dimensionally in a partially overlapping manner in the rotation direction.
  • the line sensor 53A detects presence or absence of the yarn Y in a range R indicated in Fig. 5(A) .
  • control portion 25 rotates the storage roller 41 one turn at low speed (less than 200 rpm), and determines presence or absence of the yarn Y on the outer periphery surface 41d, on the basis of the detection result by the line sensor 53A when the storage roller 41 is rotated one turn.
  • the line sensor 53A of this embodiment is affected little by the reflection light from the first recess 43a or the second recess 43b. Therefore, the storage amount can be detected by neglecting the reflection light from the first recess 43a and the second recess 43b.
  • the reflection light is intense and is easily detected by the line sensor 53A.
  • the reflection light is weak and is hardly detected by the line sensor 53A.
  • the light emitted from the light emission portion 55 and reflected by the outer periphery surface 41d is not directed to the line sensor 53A side but is directed to the cover 47 side.
  • the detection result by the line sensor 53A is obtained by the control portion 25 as data illustrated in Fig. 6 , for example.
  • a region in which the detected light is relatively intense i.e., a region in which whitish image is obtained after conversion into a BMP image
  • a region in which the detected light is relatively weak i.e., a region in which dusky image is obtained after conversion into a BMP image
  • a pixel position (pixel) in the detection result by the line sensor 53A indicates a position in the straight section S1.
  • the control portion 25 can determine positions where the yarn Y exists, and positions where the yarn Y does not exist, in the straight section S1. In this way, on the basis of light intensity detected by the line sensor 53A, the control portion 25 can accurately detect presence or absence of the yarn Y in the range R illustrated in Fig. 5(B) .
  • the first recess 43a and the second recess 43b are formed on the outer periphery surface 41d of the storage roller 41 of this embodiment.
  • the control portion 25 determines that the storage roller 41 has rotated one turn when detecting that the first recess 43a as a reference has made one turn.
  • the control portion 25 can know positions of the first recess 43a and the second recess 43b on the basis of a motor rotation amount or a mark (such as a magnetic mark) provided to the recess.
  • the light reflected by the first recess 43a or the second recess 43b may be directed to the line sensor 53A side. In this case, the control portion 25 cannot accurately detect presence or absence of the yarn Y based on the detection result by the line sensor 53A.
  • the control portion 25 of this embodiment determines presence or absence of the yarn Y on the outer periphery surface 41d, on the basis of the detection result by the line sensor 53A at a position different from positions of the first recess 43a and the second recess 43b. Specifically, the control portion 25 determines presence or absence of the yarn Y on the outer periphery surface 41d, on the basis of the detection result by the line sensor 53A in all areas where the first recess 43a or the second recess 43b is not formed. More specifically, as illustrated in Fig.
  • a plurality of recesses (the first recess 43a and the second recess 43b) are formed along the rotation direction of the storage roller 41, and a plurality of connecting sections 41h are formed, each of which is a region between the recesses neighboring in the rotation direction.
  • the control portion 25 determines presence or absence of the yarn Y in the storing area A.
  • the control portion 25 may obtain data by the line sensor 53A in a state where rotation of the storage roller 41 is stopped.
  • the control portion 25 can know positions without the first recess 43a or the second recess 43b on the basis of a motor rotation amount or a mark (such as a magnetic mark) provided to the recess.
  • the control portion 25 may obtain the data by the line sensor 53A while intermittently rotating the storage roller 41. Note that the control portion 25 may detect only necessary sections by rotating the storage roller 41 at low speed.
  • control portion 25 may control the line sensor 53A to always detect, and may not determine presence or absence of the yarn Y on the outer periphery surface 41d only at positions of the first recess 43a and the second recess 43b.
  • the line sensor 53A for detecting the yarn Y wound around the outer periphery surface 41d of the storage roller 41 is constituted of the line sensor 53A, which detects presence or absence of the yarn Y in the straight section S1 connecting the upstream side end and the downstream side end in the yarn running direction on the outer periphery surface 41d (the storing area A).
  • the line sensor 53A detects presence or absence of the yarn Y in the straight section S1 connecting the upstream side end and the downstream side end in the yarn running direction on the outer periphery surface 41d (the storing area A).
  • the winder unit 2 of the embodiment described above includes the light emission portion 55 that emits light to the storage roller 41, and hence the light received by the line sensor 53A has intensity variation (contrast), so that detection accuracy of the yarn Y by the control portion 25 can be improved.
  • the light emission portion 55 of the winder unit 2 of the embodiment described above includes the two light sources 55B and 55B and the optical waveguide 55C that converts light emitted from the two light sources 55B and 55B into surface-emitting light and emits the same to the storage roller 41, and hence the light emitted from the light emission portion 55 can be uniformed. In this way, accuracy of detecting the yarn Y can be improved.
  • the line sensor 53A of the winder unit of the embodiment described above is configured to receive light through the lens 53B for condensing incident light, and hence the detection portion 53 can be constituted compactly.
  • the line sensor 53A of the winder unit 2 of the embodiment described above is disposed at a position such that the light emitted from the light emission portion 55 and reflected by the outer periphery surface 41d of the storage roller 41 does not enter it, and that the light emitted from the light emission portion 55 and reflected by the yarn Y stored on the storage roller 41 enters it. In this way, detection accuracy of the white color yarn Y, which easily reflects light, wound around the storage roller 41 can be improved.
  • the yarn storage device 40 of the winder unit 2 of the embodiment described above is equipped with the cover 47 that faces a part of the outer periphery surface 41d of the storage roller 41, and the cover 47 is disposed to cover a part of propagation directions of light that is emitted from the light emission portion 55 and is reflected by the outer periphery surface 41d of the storage roller 41.
  • fluff generated in the storage roller 41 is prevented from scattering to various places, and by controlling airflow generated by rotation of the storage roller 41, the end of the yarn is prevented from contacting peripheral structures.
  • the opposing surface 47a of the cover 47 to which light from the light emission portion 55 enters, is formed with black color, and hence it can absorb the light that is emitted from the light emission portion 55 and is reflected by the outer periphery surface 41d of the storage roller 41. In this way, light (ambient light) that is reflected by a part other than the yarn Y and enters the line sensor 53A is suppressed, and hence detection accuracy of the yarn Y by the control portion 25 can be improved.
  • the control portion 25 of the winder unit 2 of the embodiment described above rotates at least the storage roller 41 one turn, and determines presence or absence of the yarn Y in the storing area A, on the basis of the detection result by the line sensor 53Awhen the storage roller 41 is rotated one turn. In this way, presence or absence of the yarn Y can be detected in all regions of the outer periphery surface 41d of the storage roller 41, and hence detection accuracy of the yarn Y by the control portion 25 can be improved.
  • the yarn Y stored on the storage roller 41 when the yarn Y stored on the storage roller 41 is unwound or eliminated because a defect of the yarn Y or the like is found, the yarn Y may remain on the storage roller 41. Further, If the yarn splicing is started in this state with the remaining yarn Y, and the yarn Y is newly stored on the storage roller 41, the yarn Y may be entangled, or break of the yarn may occur.
  • the winder unit 2 of the embodiment described above may prohibit the storage roller 41 from storing the yarn Y if the control portion 25 has detected the remaining yarn Y
  • the storage roller 41 is prohibited from storing the yarn Y in the state where the yarn Y remains on the storage roller 41, it is possible to avoid occurrence of the entangled yarn Y or break of the yarn in the winder unit 2.
  • the control portion 25 of the winder unit 2 of the embodiment described above determines that the storage roller 41 has rotated one turn when detecting that the first recess 43a has made one turn. In this way, the control portion 25 can determine that the storage roller 41 has rotated one turn by a simple method.
  • the control portion 25 of the winder unit 2 of the embodiment described above determines presence or absence of the yarn Y in the storing area A, on the basis of the detection result by the line sensor 53A at a position different from positions of the first recess 43a and the second recess 43b. In this way, it is possible to avoid erroneous determination of presence or absence of the yarn Y by the control portion 25, due to detection or non-detection of the first recess 43a and the second recess 43b by the line sensor 53A.
  • the control portion 25 of the winder unit 2 of the embodiment described above determines presence or absence of the yarn Y in the storing area A, on the basis of the detection result by the line sensor 53A in all positions where the first recess 43a or the second recess 43b is not formed. In this way, detection accuracy of the yarn Y can be improved on the storage roller 41 having the outer periphery surface 41d on which the first recess 43a and the second recess 43b are formed.
  • the line sensor 53A is disposed at a position such that the light emitted from the light emission portion 55 and reflected by the outer periphery surface 41d of the storage roller 41 does not enter it, and that the light emitted from the light emission portion 55 and reflected by the yarn Y stored on the storage roller 41 enters it, but this is not a limitation.
  • the line sensor 53A may be disposed at a position where the light that is emitted from the light emission portion 55 and is reflected by the outer periphery surface 41d of the storage roller 41 enters it.
  • detection accuracy of the yarn Y having black color in particular (colored yarn), which hardly reflect light, wound around the storage roller 41 can be improved.
  • the yarn Y exists on the outer periphery surface 41d of the storage roller 41
  • the light emitted from the light emission portion 55 is absorbed by the yarn Y, and is not reflected to the line sensor 53A side.
  • the yarn Y does not exist on the outer periphery surface 41d of the storage roller 41
  • the light reflected by the outer periphery surface 41d is directed to the line sensor 53A side, and the line sensor 53A detects the light.
  • the detection result by the line sensor 53A is obtained by the control portion 25 as data illustrated in Fig. 8 , for example.
  • a region in which the detected light is relatively intense i.e., a region in which whitish image is obtained after conversion into a BMP image
  • a region in which the detected light is relatively weak i.e., a region in which dusky image is obtained after conversion into a BMP image
  • the embodiment described above has the structure suitable for the case where the white color yarn Y having relatively high reflectance is used.
  • the variation A1 and the variation A2 have the structure suitable for the case where the black color (colored) yarn Y having relatively low reflectance is used.
  • a variation A3 describes an example having a structure suitable for a case where the white color yarn Y and the black color (colored) yarn Y are exchanged and used.
  • the winder unit 2 according to the variation A3 may have, in addition to the structure of the embodiment including a white color yarn light emission portion 552 (55) that is the light emission portion 55 for detecting white color yarn, a structure including a colored yarn light emission portion 551 (55) that is the light emission portion 55 for detecting black color (colored) yarn Y according to the variation A2, and the cover 47, so that the single line sensor 53 can detect both the white color yarn Y and the black color (colored) yarn Y
  • the single line sensor 53 when detecting the white color yarn Y, the light emitted from the colored yarn light emission portion 551 of the embodiment may pass through the slit 47b and badly affect the detection result by the line sensor 53 (cause a false detection).
  • the slit 47b is provided with a flapper 48, which is opened and closed by an actuator (such as a cylinder or a solenoid). Further, the control portion 25 controls the actuator, so that the flapper 48 is opened when detecting the black color (colored) yarn Y, while it is closed when detecting the white color yarn Y
  • the winder unit 2 according to the variation A3 includes a control portion as a mode switching portion, which selectively switches between a white color yarn detection mode that is a detection mode for the white color yarn and a colored yarn detection mode that is a detection mode for the colored yarn.
  • the control portion controls the white color yarn light emission portion 552 to emit light, and determines that the yarn Y exists in the part where the light is received by the line sensor 53.
  • the control portion controls the colored yarn light emission portion 551 to emit light, and determines that the yarn Y exists in the part where the light is not received by the line sensor 53.
  • the winder unit 2 according to the variation A3 is configured so that the detection mode can be set using the machine control device 3 (or other device like the machine control device 3). By setting the mode, the state of the flapper and the detection method can be switched between those suitable for detecting the white color yarn Y and those suitable for detecting the black color (colored) yarn Y
  • the cover 47 may have a structure where an end thereof can be expanded and contracted, and it may be controlled so that the end of the cover 47 is contracted when detecting the black color (colored) yarn Y, while it is expanded when detecting the white color yarn Y
  • the flapper 48 or the expandable/contractible cover 47 the operator may set a screen or the like depending on the type of the yarn to be used (black color yarn or white color yarn).
  • the winder unit 2 according to a variation A4 is an example having a structure suitable for the case where the white color yarn Y and the black color (colored) yarn Y are exchanged and used.
  • the structure of the winder unit 2 according to the variation A4 is different from that of the winder unit 2 according to the variation A3 in the following point.
  • the winder unit 2 according to the variation A4 is equipped with a white color yarn detection line sensor 532 for detecting light emitted from the white color yarn light emission portion 552 (55), and a colored yarn detection line sensor 531 for detecting light emitted from the colored yarn light emission portion 551 (55).
  • the colored yarn light emission portion 551 emits light to the outer periphery surface 41d of the storage roller 41 through the slit 47b, and the colored yarn detection line sensor 531 is disposed at a position for receiving the light emitted from the colored yarn light emission portion 551 and reflected by the outer periphery surface 41d of the storage roller 41.
  • the white color yarn light emission portion 552 emits light to the outer periphery surface 41d of the storage roller 41, and the white color yarn detection line sensor 532 is disposed at a position such that the light emitted from the white color yarn light emission portion 552 and reflected by the outer periphery surface 41d of the storage roller 41 does not enter it, and that the light emitted from the white color yarn light emission portion 552 and reflected by the yarn Y stored on the storage roller 41 enters it.
  • the control portion 25 When using the black color (colored) yarn Y and determining whether or not the yarn Y is stored on the storage roller 41, the control portion 25 opens the flapper 48. When using the white color yarn Y, or when it is not determined whether or not the black color (colored) yarn Y is stored on the storage roller 41, the control portion 25 closes the flapper 48. In this way, in the winder unit 2, the white color yarn Y and the black color (colored) yarn Y can be exchanged and used.
  • the slit 47b may be provided with a transparent window, which has a transmittance of 0.4 to 0.6, for example. Note that the transparent window can also be used in the variations A2 and A3.
  • the variations A3 and A4 exemplify the structure in which the cover 47 is disposed as the yarn storage device 40, and describes the example of the structure suitable for the case where the white color yarn Y and the black color (colored) yarn Y are exchanged and used.
  • the detection device 50 including the detection portion 53 and the light emission portion 55 may be capable of relatively moving with respect to the storage roller 41.
  • the movement of the detection device 50 includes at least one of horizontal movement and rotational movement.
  • the detection device 50 may be configured to be capable of being manually moved or being moved by an actuator or the like.
  • the detection device 50 when using the black color (colored) yarn Y, as illustrated in Fig. 10(A) , the detection device 50 is moved to a position such that the light emission portion 55 emits light to the outer periphery surface 41d of the storage roller 41, and that the light emitted from the light emission portion 55 and reflected by the outer periphery surface 41d of the storage roller 41 enters the line sensor 53A.
  • the white color yarn Y as illustrated in Fig.
  • the detection device 50 is moved to a position such that the light emission portion 55 emits light to the outer periphery surface 41d of the storage roller 41, and that the light emitted from the light emission portion 55 and reflected by the outer periphery surface 41d of the storage roller 41 does not enter the line sensor 53A, and that the light emitted from the light emission portion 55 and reflected by the yarn Y stored on the storage roller 41 enters the same.
  • the white color yarn Y and the black color (colored) yarn Y can be exchanged and used.
  • the embodiment and the variations A1 to A5 describe the examples in which the first recess 43a and the second recess 43b are formed on the outer periphery surface 41d of the storage roller 41, but neither the first recess 43a nor the second recess 43b may be formed, or only one of the first recess 43a and the second recess 43b may be formed.
  • the detection method of the yarn Y may be changed depending on presence or absence of mirror finishing (plating) on the first recess 43a and the second recess 43b formed on the outer periphery surface 41d of the storage roller 41.
  • the black color (colored) yarn Y in the arrangement of the detection device 50 illustrated in Fig. 10(A) .
  • the detection result by the line sensor 53A it is preferred to use the detection result by the line sensor 53A at a position where the first recess 43a or the second recess 43b does not exist, but this is not a limitation.
  • the white color yarn Y it is preferred to use the detection result by the line sensor 53A at a position where the first recess 43a or the second recess 43b does not exist, but this is not a limitation.
  • the white color yarn Y in the arrangement of the detection device 50 illustrated in Fig. 10(A) .
  • the first recess 43a and the second recess 43b are detected so as to detect the white color yarn Y
  • the yarn Y is wound not in a single layer but in double or more layers as illustrated in Fig. 12 , which causes a lap-wound part F of the yarn. Occurrence of this lap-wound part F is not preferred. If the lap-wound part F occurs, tension applied to the yarn Y becomes nonuniform, and unwinding of the yarn from the storage roller may not proceed normally, or stress is applied to the yarn, which may cause a malfunction such as uneven thickness of the yarn or break of the yarn.
  • the inventors of the present disclosure have studied intensively to detect the lap-wound part F. As a result, the inventors found that position of a storage upstream end E1 of the yarn moves to the upstream end side when the lap-wound part F occurs on the outer periphery surface 41d of the storage roller 41.
  • Fig. 14 illustrates a temporal change of the position of the storage upstream end E1 of the yarn (corresponding to a distance D E1 from the upstream side end of the storing area A to the position of the storage upstream end E1 of the yarn, as illustrated in Fig. 11 ), which is measured by the detection device 50 on the storage roller 41 of the yarn, when the winder unit 2 performs winding operation.
  • the time start point is set for convenience sake, and time 0 does not indicate a specific time point (such as a time when the storage roller starts to rotate).
  • the position of the storage upstream end E1 on the vertical axis only indicates a fluctuation of a relative position, and does not indicate a value of the distance D E1 itself.
  • the upper part of the vertical axis of the graph corresponds to the downstream side of the storing area A
  • the lower part of the vertical axis of the graph corresponds to the upstream side of the storing area A.
  • the fluctuation of the position of the storage upstream end E1 of the yarn is utilized to detect occurrence of the lap-wound part F of the yarn.
  • the position of the storage upstream end E1 of the yarn is moved to the upstream side (the distance D E1 is reduced) by a predetermined amount or more in a predetermined period of time, it is determined that the lap-wound part F has occurred.
  • Fig. 15 illustrates an example of fluctuation of the position of the storage upstream end E1 before and after splicing. Note that in this case, the storage roller 41 is rotated reversely for splicing. Fig. 15 shows that the position of the storage upstream end E1 is temporarily moved to the downstream side largely in the process of splicing, and next it is moved largely to the upstream side as shown by arrow x2. In addition, the position of the storage upstream end E1 after splicing is substantially the same as that before splicing. In other words, in the case of Fig. 15 , similarly to the case of Fig.
  • Fig. 16 shows a case where a long defect of the yarn Y was found, and a long suction was performed from the storage upstream end E1 side so as to eliminate the yarn on the storage upstream end E1 side.
  • the position of the storage upstream end E1 is gradually moved to the downstream side, and after splicing, when the normal winding operation restarts, the position of the storage upstream end E1 is rapidly moved to the upstream side as shown by arrow x3.
  • the lap-wound part F of the yarn is not generated. Therefore, if it is determined that the lap-wound part F of the yarn has occurred on the basis of the rapid movement of the position of the storage upstream end E1 to the upstream side, it is a false detection.
  • Fig. 17 shows a case where there was disordered winding of the yarn around the storage roller, such as the lap-wound part F of the yarn, the operator eliminated the storage upstream end E1 side manually (during time period t4 shown in Fig. 17 ), restored, and after splicing, the winding operation was restarted, when the position of the storage upstream end E1 was rapidly lowered as shown by arrow x4 in Fig. 17 . In this case too, the lap-wound part F of the yarn is not generated. If it is determined that the lap-wound part F of the yarn has occurred based on the rapid movement of the storage upstream end E1 to the upstream side, it is a false detection.
  • Fig. 18 shows a case where the position of the storage upstream end E1 was temporarily moved to the upstream side (as shown by arrow x5 in Fig. 18 ), it was determined that the lap-wound part F of the yarn had occurred, and after stopping the winding operation, the operation was restarted. In this case, the position of the storage upstream end E1 was not largely changed after restarting the winding operation (as shown by arrow x6 in Fig. 18 ). However, more yarn is wound at the lap-wound part F of the yarn.
  • the position of the storage upstream end E1 in the stable winding operation before yarn splicing is set as the reference position of the storage upstream end E1.
  • the time period between splicing and next splicing by the yarn splicing device, during which the yarn winding machine stably winds the yarn is referred to as a stable period.
  • the reference position is the storage upstream end position of the yarn detected by the detection device during the stable period.
  • the reference position is updated at least once every stable winding operation between splicing and splicing (every stable period), and the latest reference position is used for determining occurrence of the lap-wound part F of the yarn.
  • the drive motor 45 for driving the storage roller 41 is turned on during the stable winding operation period (stable period), which does not include the time just after the drive motor 45 is turned on and the time just before it is turned off, in the time period after break of the yarn until the drive motor 45 is turned off.
  • the determination of occurrence of the lap-wound part F of the yarn is not performed during the time just after the drive motor 45 is turned on.
  • the method of the present disclosure can detect occurrence of the lap-wound part F of the yarn by a simpler method, instead of directly observing occurrence of the lap-wound part F of the yarn, and can be applied to control of the winder unit 2.
  • inlet side tension of the storage roller 41 (storage tension) is increased.
  • the yarn feeding bobbin is replaced, a new yarn feeding bobbin is set, and the winding operation is restarted. Then, because of a rapid change in tension, the possibility of occurrence of the lap-wound part F of the yarn on the storage roller is increased.
  • the tension is set higher than that in the normal operation for a predetermined period of time. This control can reduce probability of occurrence of the lap-wound part F of the yarn on the storage roller.
  • Fig. 20 shows temporal changes in target tension, measured storage tension, and rotation speed of the storage roller, before and after replacing the yarn feeding bobbin.
  • the tension of the former yarn feeding bobbin just before replacement is measured, and the tension of the new yarn feeding bobbin just after starting to use is controlled to be substantially the same as the former tension.
  • the tension control value is controlled to be the same value as the tension just before replacement. However, as winding start tension tends to fluctuate, if a shift of real tension value is within a range of ⁇ 15 to 20%, it is allowed regarding that it is controlled in substantially the same value.
  • the wording that the tension just after replacing the yarn feeding bobbin is the same as the tension just before replacing the yarn feeding bobbin means that the tension control value is controlled to be the same value as the tension just before replacing, though if real tension value is controlled to be within a range of ⁇ 15 to 20%, it is regarded that the tension just after replacing the yarn feeding bobbin is the same as the tension just before replacing the yarn feeding bobbin.
  • This control can reduce probability of occurrence of the lap-wound part F of the yarn on the storage roller.
  • FIG. 21 A flowchart of the method of the winding operation by the winder unit 2 of this embodiment is illustrated in Fig. 21 .
  • Step S101 the normal winding operation is performed first in Step S101.
  • Step S102 the control portion determines whether or not the winding is finished. If the winding is finished, the flow of the winding operation is finished. If the winding is not finished, the process proceeds to Step S103.
  • Step S103 the control portion determines whether or not the lap-wound part F has occurred, on the basis of a detection result by the detection device 50. If the lap-wound part F has not occurred, the process returns to Step S101, in which the winding operation is continued. If the lap-wound part F has not occurred, the loop from Step S101 to Step S103 is repeated, and when it is determined that the winding is finished in Step S102, the winding operation is finished.
  • Step S103 If it is determined in Step S103 that the lap-wound part F has occurred, the process proceeds to Step S104.
  • Step S104 the lap-wound part eliminating operation is performed for a predetermined period of time.
  • the predetermined period of time is set so that most lap-wound parts F can be eliminated.
  • the predetermined period of time may be fixed, or may be set for each rod, or may be appropriately set based on feedback of real operation status.
  • the lap-wound part F can occur in various positions, and various amount of yarn is overlapped in the lap-wound part.
  • the time necessary for completely eliminating the lap-wound part F varies depending on the degree of overlapping in the lap-wound part F. It is not preferred to set the predetermined period of time as a long time sufficient for eliminating every lap-wound part. It is usually set as a minimum time sufficient for eliminating lap-wound parts having a shape that occurs most frequently.
  • Step S104 After performing the lap-wound part eliminating operation for the predetermined period of time in Step S104, the process returns to Step S101, in which the winding operation is restarted. The process proceeds again to Step S101, Step S102, and Step S103. In Step S103 again, it is determined whether or not the lap-wound part has occurred. If the lap-wound part F has not occurred, the process returns to Step S101, in which the winding operation is continued.
  • Step S103 if it is determined again that the lap-wound part has occurred, the process proceeds again to Step S104, in which the lap-wound part eliminating operation is performed for the predetermined period of time.
  • Step S104 in which the lap-wound part eliminating operation is performed for the predetermined period of time.
  • the control portion 25 stops rotation of the storage roller 41, and controls the cutter 15 to cut the yarn Y
  • the control portion 25 controls the storage roller 41 to rotate reversely at relatively low speed.
  • the control portion controls the suction mechanism to suck and eliminate the yarn around the storage roller 41 from the storage upstream end E1 side.
  • the suction mechanism includes the downstream yarn blow-off portion 80.
  • the downstream yarn blow-off portion 80 ejects the compressed air so as to suck the yarn on the storing area A of the storage roller 41 from the storage upstream end side. In this case, the traverse drum 24 is stopped or rotated at low speed.
  • the storage roller 41 is rotated reversely for the predetermined period of time, so as to eliminate the yarn around the storage roller 41 from the upstream end side, and hence the yarn Y on the storage upstream end E1 side is eliminated as illustrated in Fig. 13 .
  • the control portion 25 controls the yarn splicing device 14 to splice the yarn Y on the storage roller 41 side and the yarn on the yarn feeding bobbin 21 side. Then, it rotates the storage roller 41 forward again, and rotates the traverse drum 24, so as to perform the normal winding operation.
  • the method for eliminating the lap-wound part F formed on the storage roller 41 has the following feature.
  • this method can eliminate a defective part such as the lap-wound part F due to abnormal tension substantially completely, and has high effectiveness.
  • it has a merit that the lap-wound part is hardly formed again even if an abnormal part such as the lap-wound part F or the yarn remaining on the downstream side without abnormality collides the yarn wound on the upstream side after restarting the operation.
  • it has a demerit that much waste yarn is generated due to the sucking and eliminating, and a demerit that it takes long time for rotating the storage roller reversely at low speed.
  • the method for eliminating the lap-wound part the method of eliminating the lap-wound part F from the downstream end side is also considered.
  • the traverse drum 24 is rotated, and the yarn is wound to be the package, while the storage roller 41 is stopped or rotated at low speed, and hence the yarn of the storing area is taken up from the upstream side.
  • This method has a merit that waste yarn is not generated, and a merit that the lap-wound part F can be eliminated at relatively high speed.
  • the lap-wound part F is large or long, it is highly possible that the elimination is insufficient.
  • the yarn remains on the upstream side of the storing area and interferes with the yarn that is wound next around the storage roller 41 resulting in occurrence the lap-wound part F again. Therefore, in general, the method of sucking and eliminating from the upstream end side described above is more preferred as the method for eliminating the lap-wound part.
  • the detection device 50 includes the detection portion 53 and the light emission portion 55, and the detection portion 53 includes the line sensor 53A.
  • the detection device 50 includes the detection portion 53 and the light emission portion 55.
  • the detection portion 53 includes a plurality of light receiving sensors 533.
  • the plurality of light receiving sensors 533 are arranged in a line along the extending direction of the rotation axis C1 of the storage roller 41 outside the outer periphery surface 41d of the storage roller 41.
  • the light emission portion 55 is constituted of a plurality of light sources 55B.
  • the plurality of light sources 55B are arranged in a line along the extending direction of the rotation axis C1 of the storage roller 41 outside the outer periphery surface 41d of the storage roller 41.
  • the light sources 55B are, for example, light emitting diodes (LEDs).
  • the LEDs are mounted on the LED substrate 55A.
  • the detection portion 53 and the light emission portion 55 have the same functions respectively as the detection portion 53 and the light emission portion 55 of the first embodiment.
  • the detection device 50 is a video camera 540.
  • the video camera 540 is disposed outside the outer periphery surface 41d of the storage roller 41.
  • the video camera 540 captures image of the storing area A of the storage roller 41, so as to detect the storage upstream end E1 of the yarn. Further, similarly to the first embodiment, the detection device 50 detects fluctuation of the position of the storage upstream end E1 of the yarn.
  • the yarn winding machine of the first embodiment uses the automatic winder including the yarn storage device.
  • the yarn winding machine of the variation C1 may be an air spinning machine including the yarn storage device.
  • the air spinning machine spins the yarn by air.
  • the air spinning machine is described in JP-A-2017-65896 , for example.
  • the description in JP-A-2017-65896 is referred to in this specification, just as it is.
  • the yarn winding machine of the variation C2 may be an open-end spinning machine including the yarn storage device.
  • the open-end spinning machine spins the yarn by a rotation force of a rotor.
  • the open-end spinning machine is described in JP-A-S60-36268 .
  • the description in JP-A-S60-36268 is referred to in this specification, just as it is.
  • the winder unit 2 (an example of the yarn winding machine) includes the yarn feeding portion 6 (an example of the feeding portion), the package forming portion 8 (an example of the winding portion), the yarn storage device 40, the detection device 50, and the control portion 25.
  • the yarn feeding portion 6 feeds the yarn.
  • the package forming portion 8 winds the yarn fed from the yarn feeding portion 6 so as to form the package.
  • the yarn running path through which the yarn Y runs is formed between the yarn feeding portion 6 and the package forming portion 8.
  • the yarn storage device 40 includes the storage roller 41 disposed in the yarn running path. When the storage roller 41 is rotated, the yarn fed from the yarn feeding portion 6 is wound around the outer periphery surface 41d of the storing area A of the storage roller 41 so that the yarn is temporarily stored.
  • the detection device 50 detects the yarn wound around the outer periphery surface 41d of the storage roller 41.
  • the control portion 25 controls rotation of the storage roller 41, and obtains detection data from the detection device 50, so as to determine whether or not the lap-wound part F has occurred in the storing area A.
  • the yarn winding machine of the present disclosure can be applied to efficient production of the packages with good quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
EP23203981.8A 2022-10-19 2023-10-17 Garnwickelmaschine Pending EP4357285A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2022167897A JP2024060493A (ja) 2022-10-19 2022-10-19 糸巻取機

Publications (1)

Publication Number Publication Date
EP4357285A1 true EP4357285A1 (de) 2024-04-24

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ID=88417341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23203981.8A Pending EP4357285A1 (de) 2022-10-19 2023-10-17 Garnwickelmaschine

Country Status (3)

Country Link
EP (1) EP4357285A1 (de)
JP (1) JP2024060493A (de)
CN (1) CN117902388A (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083924A (en) * 1959-09-11 1963-04-02 Textile Devices Corp Yarn furnishing device
JPS6036268A (ja) 1983-06-24 1985-02-25 ビズクムニイ　ウスタフ　バブルナルスキイ 糸を引き出し巻取る装置
JP2016050053A (ja) 2014-08-28 2016-04-11 村田機械株式会社 糸巻取装置
JP2017065896A (ja) 2015-09-30 2017-04-06 村田機械株式会社 糸掛け部材、糸貯留装置、及び糸巻取機
EP4215468A1 (de) * 2022-01-19 2023-07-26 Murata Machinery, Ltd. Garnwickler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083924A (en) * 1959-09-11 1963-04-02 Textile Devices Corp Yarn furnishing device
JPS6036268A (ja) 1983-06-24 1985-02-25 ビズクムニイ　ウスタフ　バブルナルスキイ 糸を引き出し巻取る装置
JP2016050053A (ja) 2014-08-28 2016-04-11 村田機械株式会社 糸巻取装置
JP2017065896A (ja) 2015-09-30 2017-04-06 村田機械株式会社 糸掛け部材、糸貯留装置、及び糸巻取機
EP4215468A1 (de) * 2022-01-19 2023-07-26 Murata Machinery, Ltd. Garnwickler

Also Published As

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CN117902388A (zh) 2024-04-19
JP2024060493A (ja) 2024-05-02

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