EP2949793B1 - Spinning machine and spinning method - Google Patents
Spinning machine and spinning method Download PDFInfo
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- EP2949793B1 EP2949793B1 EP15165786.3A EP15165786A EP2949793B1 EP 2949793 B1 EP2949793 B1 EP 2949793B1 EP 15165786 A EP15165786 A EP 15165786A EP 2949793 B1 EP2949793 B1 EP 2949793B1
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- Prior art keywords
- spinning
- timing
- yarn
- fiber bundle
- pneumatic
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/11—Spinning by false-twisting
- D01H1/115—Spinning by false-twisting using pneumatic means
Definitions
- US 5 419 110 A discloses a spinning machine in which, upon a yarn breakage, a back roller is stopped, thereupon a spinning nozzle is turned off, and thereupon separation of a spindle portion takes place.
- a spinning method of the present invention is executed in a spinning machine including a draft device adapted to draft a fiber bundle, and a pneumatic spinning device arranged movable to a spinning position and a receded position, which is located further away from the draft device than the spinning position, and adapted to produce a yarn by applying twists to the drafted fiber bundle by injecting air to a spinning chamber while being located at the spinning position.
- the spinning method includes adjusting at least one of a first timing, which is a timing at which injection of the air is stopped when a drafting operation of the draft device is stopped, and a second timing, which is a timing at which the pneumatic spinning device starts being moved from the spinning position to the receded position when the drafting operation of the draft device is stopped.
- each spinning unit 2 includes a draft device 6, an injecting device 14, a suction device 15, a pneumatic spinning device 7, a yarn monitoring device 8, a tension sensor 9, a yarn accumulating device 50, a waxing device 11, and a winding device 12 in this order from upstream.
- the devices are directly or indirectly supported by a machine frame 13 such that upstream becomes an upper side in a machine height direction, (in other words, such that downstream becomes a lower side in the machine height direction).
- the pneumatic spinning device 7 is movably (swingably) supported by a support shaft (not illustrated). As illustrated in FIGS. 4 and 5 , the pneumatic spinning device 7 can be moved to a receded position, which is located further away from the draft device 6 than the spinning position. When the pneumatic spinning device 7 is located at the receded position, the hollow guide shaft body 80 can be further moved from the nozzle block 70. When the pneumatic spinning device 7 is moved from the spinning position to the receded position, as illustrated in FIG. 4 , the nozzle block 70 and the hollow guide shaft body 80 are integrally moved away from the draft device 6. Then, as illustrated in FIG. 5 , only the nozzle block 70 stops at a predetermined position. The hollow guide shaft body 80 continues the movement in order to be located away from the nozzle block 70. Subsequently, the hollow guide shaft body 80 that has been moved away from the nozzle block 70 stops at a predetermined position.
- the injecting device 14 is adapted to inject air towards a region C between the draft device 6 and the pneumatic spinning device 7 after the pneumatic spinning device 7 starts being moved from the spinning position to the receded position.
- the injecting device 14 is arranged to inject the air such that the air crosses a fiber passage (a path where the fiber bundle F travels) in the region C.
- the injecting device 14 is preferably arranged to inject the air along a direction vertical to the fiber passage.
- the injecting device 14 is controlled by the unit controller 10 to inject the air at a desired timing.
- the suction device 15 is arranged to face the injecting device 14 with the region C therebetween, and is adapted to suck a fiber that remains in and around the region C.
- the unit controller 10 further has a function as an adjusting section of the first timing L.
- the unit controller 10 can adjust the first timing L by storing data selected by an operator via an input section (not illustrated) in the storage section and performing a control program in accordance with the selected data.
- the first timing L is adjusted to be relatively early (for example, to be earlier than the first timing L illustrated in FIG. 6B ). Accordingly, since twists are not sufficiently applied to the yarn end of the yarn Y, the length of the fiber bundle portion Y1 becomes long.
- the length of the fiber bundle portion Y1 is lengthened, for example, in a case of reliably catching the yarn end of the yarn Y when performing the yarn joining operation.
- twists are not appropriately applied to the yarn end of the yarn Y in the pneumatic spinning device 7, and the fiber bundle portion Y1 is formed at the yarn end of the yarn Y.
- the first timing L to stop the injection of the air in the pneumatic spinning device 7 when the drafting operation of the draft device 6 is stopped is adjusted, the length of the fiber bundle portion Y1 to be formed at the yarn end of the yarn Y can be adjusted.
- twists are not appropriately applied to the yarn end of the yarn Y" means that twists different from twists at the time of spinning are applied to the yarn end of the yarn Y or twists are not applied to the yarn end of the yarn Y.
- the unit controller 10 controls the operations relating to the adjustments of the first timing L, the second timing M, and the third timing N.
- an adjustment mechanism to adjust at least one of the first timing L, the second timing M, and the third timing N may be arranged separately from the unit controller 10, and an operator may directly adjust at least one of the first timing L, the second timing M, and the third timing N by such an adjustment mechanism without the unit controller 10.
- the length of the air path may be adjusted by the operator.
- the first timing L can be adjusted.
- the positional relation may be adjusted by the operator. Since a timing at which the actuator starts acting on the pneumatic spinning device 7 is varied by adjusting the positional relation, the second timing M can be adjusted. In such a manner, at least one of the first timing L, the second timing M, and the third timing N may be directly adjusted without the unit controller 10.
- the injecting device 14 is located on the side of the top roller 65b with respect to the region C, and the suction device 15 is located on the side of the bottom roller 65a with respect to the region C, but positions of the injecting device 14 and the suction device 15 may be reversed.
Description
- The present invention relates to a spinning machine and a spinning method.
- Conventionally, there is known a spinning machine including a draft device adapted to draft a fiber bundle and a pneumatic spinning device adapted to produce a yarn by applying twists to the drafted fiber bundle by injecting air to a spinning chamber while being located at a spinning position (see Japanese Patent Application Laid-open No.
2006-144136 -
US 5 419 110 A discloses a spinning machine in which, upon a yarn breakage, a back roller is stopped, thereupon a spinning nozzle is turned off, and thereupon separation of a spindle portion takes place. -
EP 1 207 224 A2 discloses a spinning machine comprising an air shower tube for blowing pressurized air to a sliver during piecing. In addition, a suction pipe for holding the spun yarn at a winding package side and sucking the fiber blew off by the pressurized air from the air shower tube is provided. - In the spinning machine as described above, for example, when accumulating the yarn in a yarn accumulating device using a yarn accumulating roller, if a length of the fiber bundle portion is excessively long, the fiber bundle portion may remain at the yarn accumulating roller. If the length of the fiber bundle portion is excessively short, a yarn end of the yarn from a winding device may not be reliably caught when performing a yarn joining operation.
- An object of the present invention is to provide a spinning machine and a spinning method that are capable of adjusting the length of the fiber bundle portion to be formed at the yarn end of the yarn.
- This object is achieved by spinning machines according to
claims 1 and 7 and spinning methods according toclaims - According to embodiments, a spinning machine of the present invention includes a draft device adapted to draft a fiber bundle and a pneumatic spinning device arranged movable to a spinning position and a receded position, which is located further away from the draft device than the spinning position, and adapted to produce a yarn by applying twists to the drafted fiber bundle by injecting air to a spinning chamber while being located at the spinning position. At least one of a first timing, which is a timing at which injection of the air is stopped when a drafting operation of the draft device is stopped, and a second timing, which is a timing at which the pneumatic spinning device starts being moved from the spinning position to the receded position when the drafting operation of the draft device is stopped, is adjusted.
- In the case where the drafting operation of the draft device has been stopped, when the injection of the air is stopped in the pneumatic spinning device, twists are not appropriately applied to a yarn end of the yarn in the pneumatic spinning device, and a fiber bundle portion is formed at the yarn end of the yarn. Furthermore, in the case where the drafting operation of the draft device has been stopped, when the pneumatic spinning device starts being moved from the spinning position to the receded position, twists are not appropriately applied to the yarn end of the yarn in the pneumatic spinning device, and the fiber bundle portion is formed at the yarn end of the yarn. In embodiments of the present invention, since at least one of the first timing and the second timing is adjusted, a length of the fiber bundle portion to be formed at the yarn end of the yarn can be adjusted.
- In embodiments of the present invention, at least one of the first timing and the second timing may be adjusted with a timing to stop the draft device as a reference. With this configuration, the length of the fiber bundle portion to be formed at the yarn end of the yarn can be easily and appropriately adjusted.
- In embodiments of the present invention, the first timing may be adjusted such that the first timing is delayed when shortening a length of a fiber bundle portion to be formed at a yarn end of the yarn. With this configuration, the length of the fiber bundle portion to be formed at the yarn end of the yarn can be easily adjusted.
- In embodiments of the present invention, the second timing may be set to be linked with the first timing. With this configuration, since an adjustment of the second timing is not required to be performed separately from an adjustment of the first timing, the length of the fiber bundle portion to be formed at the yarn end of the yarn can be easily adjusted.
- In embodiments of the present invention, at least one of the first timing and the second timing may be adjusted such that the pneumatic spinning machine starts moving from the spinning position to the receded position after twists are applied to a yarn end of the yarn under a state in which the pneumatic spinning device is located at the spinning position. With this configuration, since twists are reliably applied to the yarn end of the yarn without being disturbed by the movement of the pneumatic spinning device from the spinning position to the receded position, the length of the fiber bundle portion to be formed at the yarn end of the yarn can be appropriately adjusted.
- The embodiments of the present invention may further include an injecting device adapted to inject air to a region between the draft device and the pneumatic spinning device. With this configuration, the fiber bundle can be disconnected by controlling the injecting device to inject the air. The length of the fiber bundle portion thus can be appropriately adjusted by adjusting a timing to inject the air from the injecting device.
- The spinning machine of the present invention further includes a control section adapted to control an operation relating to an adjustment of at least one of the first timing and the second timing. With this configuration, the length of the fiber bundle portion can be automatically adjusted in accordance with a condition.
- According to an embodiment, a spinning method of the present invention is executed in a spinning machine including a draft device adapted to draft a fiber bundle, and a pneumatic spinning device arranged movable to a spinning position and a receded position, which is located further away from the draft device than the spinning position, and adapted to produce a yarn by applying twists to the drafted fiber bundle by injecting air to a spinning chamber while being located at the spinning position. The spinning method includes adjusting at least one of a first timing, which is a timing at which injection of the air is stopped when a drafting operation of the draft device is stopped, and a second timing, which is a timing at which the pneumatic spinning device starts being moved from the spinning position to the receded position when the drafting operation of the draft device is stopped.
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FIG. 1 is a front view illustrating a spinning machine according to an embodiment of the present invention; -
FIG. 2 is a side view illustrating a spinning unit of the spinning machine inFIG. 1 ; -
FIG. 3 is a vertical sectional view illustrating a pneumatic spinning device of the spinning unit inFIG. 2 ; -
FIG. 4 is a vertical sectional view illustrating the pneumatic spinning device moving from a spinning position to a receded position; -
FIG. 5 is a vertical sectional view illustrating the pneumatic spinning device located at the receded position; -
FIGS. 6A and 6B are each a timing chart of operations relating to an adjustment of a length of a fiber bundle portion; -
FIGS. 7A and 7B are each a timing chart of operations relating to an adjustment of the length of the fiber bundle portion; andFIGS. 8A and 8B are each a timing chart of operations relating to an adjustment of the length of the fiber bundle portion. - A preferred embodiment of the present invention will be hereinafter described in detail with reference to the accompanying drawings. The same reference numerals are denoted on the same or corresponding portions throughout the drawings, and redundant description will be omitted.
- As illustrated in
FIG. 1 , a spinning machine 1 includes a plurality ofspinning units 2, ayarn joining vehicle 3, ablower box 4, and amotor box 5. The plurality ofspinning units 2 are arranged in a row, and each of the plurality ofspinning units 2 is adapted to produce a yarn Y to wind around a package P. Theyarn joining vehicle 3 is adapted to perform a yarn joining operation in aspinning unit 2 in which the yarn Y has been disconnected. Theblower box 4 accommodates an air supply source adapted to generate, for example, suction flow and whirling flow in each section of thespinning unit 2, and the like. Themotor box 5 accommodates a motor adapted to supply power to each section of thespinning unit 2, and the like. - In the following description, upstream and downstream in a travelling direction of a sliver S, a fiber bundle F, and the yarn Y are respectively referred to as "upstream" and "downstream" simply. Furthermore, a side where a travelling path of the yarn Y is located with respect to the
yarn joining vehicle 3 is simply referred to as a "front side" and an opposite side thereto is simply referred to as a "back side". - As illustrated in
FIGS. 1 and2 , eachspinning unit 2 includes a draft device 6, aninjecting device 14, asuction device 15, apneumatic spinning device 7, ayarn monitoring device 8, atension sensor 9, ayarn accumulating device 50, awaxing device 11, and awinding device 12 in this order from upstream. The devices are directly or indirectly supported by amachine frame 13 such that upstream becomes an upper side in a machine height direction, (in other words, such that downstream becomes a lower side in the machine height direction). - The draft device 6 is adapted to produce the fiber bundle F by drafting the sliver S. The draft device 6 includes a pair of
back rollers 61, a pair ofthird rollers 62, a pair ofmiddle rollers 64 each of which is provided with anapron belt 63, and a pair offront rollers 65 in this order from upstream. Each of the pairs ofrollers rollers front rollers 65 is arranged closest to thepneumatic spinning device 7. The pair offront rollers 65 includes a bottom roller (a drive roller) 65a and a top roller (a driven roller) 65b. Drive force is applied from a drive motor (not illustrated), and thereby thebottom roller 65a is rotated. Thetop roller 65b is rotated accompanying the rotation of thebottom roller 65a. - As illustrated in
FIG. 3 , thepneumatic spinning device 7 is adapted to inject air and apply twists to the fiber bundle F drafted by the draft device 6 to produce the yarn Y while being located at a spinning position. The spinning position is a position where thepneumatic spinning device 7 is arranged to be close to the draft device 6 (specifically, the pair of front rollers 65) at the time of spinning, and is a position where thepneumatic spinning device 7 is located when the fiber bundle F is fed from the draft device 6 to thepneumatic spinning device 7. Thepneumatic spinning device 7 includes anozzle block 70 and a hollowguide shaft body 80. The hollowguide shaft body 80 is inserted into thenozzle block 70 from downstream. An internal space formed by thenozzle block 70 and the hollowguide shaft body 80 is a spinningchamber 73. - The
nozzle block 70 includes afiber guiding section 71 and a whirlingflow generating section 72. Thefiber guiding section 71 is provided with a guidinghole 71a adapted to guide the fiber bundle F fed from the draft device 6 to the spinningchamber 73. Aneedle 75 is provided to thefiber guiding section 71. A tip-end portion 75a of theneedle 75 is located in the spinningchamber 73. Theneedle 75 has a function to prevent twists from propagating upstream of the spinningchamber 73. The whirlingflow generating section 72 is provided with a plurality ofnozzles 74 that communicate to the spinningchamber 73. The plurality ofnozzles 74 are arranged such that the whirling flow is generated in the spinningchamber 73 when air is injected. The whirlingflow generating section 72 is provided with ahole portion 72a through which the hollowguide shaft body 80 is inserted. Thehole portion 72a is formed into a truncated cone shape that tapers off towards upstream and communicates to the spinningchamber 73. - The hollow
guide shaft body 80 can be inserted into thehole portion 72a of the whirlingflow generating section 72. An upper-end portion 80a of the hollowguide shaft body 80 is formed into a truncated cone shape that tapers off towards upstream. The hollowguide shaft body 80 is provided with apassage 81 extending along a central axis of the hollowguide shaft body 80. Thepassage 81 communicates to the spinningchamber 73 at an upstream side thereof, and is formed in a widened manner towards anexit 83 located downstream. A collectingsection 77 communicates to the spinningchamber 73 via a gap formed between the upper-end portion 80a of the hollowguide shaft body 80 and thehole portion 72a of the whirlingflow generating section 72. - The
pneumatic spinning device 7 is movably (swingably) supported by a support shaft (not illustrated). As illustrated inFIGS. 4 and5 , thepneumatic spinning device 7 can be moved to a receded position, which is located further away from the draft device 6 than the spinning position. When thepneumatic spinning device 7 is located at the receded position, the hollowguide shaft body 80 can be further moved from thenozzle block 70. When thepneumatic spinning device 7 is moved from the spinning position to the receded position, as illustrated inFIG. 4 , thenozzle block 70 and the hollowguide shaft body 80 are integrally moved away from the draft device 6. Then, as illustrated inFIG. 5 , only thenozzle block 70 stops at a predetermined position. The hollowguide shaft body 80 continues the movement in order to be located away from thenozzle block 70. Subsequently, the hollowguide shaft body 80 that has been moved away from thenozzle block 70 stops at a predetermined position. - As illustrated in
FIGS. 1 and2 , theyarn monitoring device 8 is adapted to monitor the travelling yarn Y between thepneumatic spinning device 7 and theyarn accumulating device 50. Theyarn monitoring device 8 transmits a yarn defect detection signal to a unit controller (a control section) 10 upon detection of a yarn defect. Theyarn monitoring device 8 detects as the yarn defect, for example, an abnormality in thickness of the yarn Y and/or a foreign substance in the yarn Y. Furthermore, theyarn monitoring device 8 detects a length of the yarn Y and transmits a length detection signal to theunit controller 10. Thetension sensor 9 is adapted to measure tension of the travelling yarn Y between thepneumatic spinning device 7 and theyarn accumulating device 50, and to transmit a tension measurement signal to theunit controller 10. The waxingdevice 11 is adapted to apply wax to the travelling yarn Y between theyarn accumulating device 50 and the windingdevice 12. - The
unit controller 10 is formed of, for example, a Central Processing Unit (CPU) adapted to perform arithmetic processing, a Read Only Memory (ROM) and a Random Access Memory (RAM) each adapted to function as a storage section, and the like, and is provided to everyspinning unit 2. Theunit controller 10 receives the yarn defect detection signal transmitted from theyarn monitoring device 8. Theunit controller 10 calculates a length of the yarn Y that has been wound by the windingdevice 12 based on the length detection signal of the yarn Y transmitted from theyarn monitoring device 8. Theunit controller 10 determines based on the calculated result, whether or not the package P is fully-wound. Theunit controller 10 may be provided to every predetermined number of thespinning units 2. Alternatively, a controller adapted to control the entire spinning machine 1 may be provided, and all thespinning units 2 may be controlled by such a controller. - As illustrated in
FIG. 4 , the injectingdevice 14 is adapted to inject air towards a region C between the draft device 6 and thepneumatic spinning device 7 after thepneumatic spinning device 7 starts being moved from the spinning position to the receded position. The injectingdevice 14 is arranged to inject the air such that the air crosses a fiber passage (a path where the fiber bundle F travels) in the region C.The injecting device 14 is preferably arranged to inject the air along a direction vertical to the fiber passage. The injectingdevice 14 is controlled by theunit controller 10 to inject the air at a desired timing. Thesuction device 15 is arranged to face the injectingdevice 14 with the region C therebetween, and is adapted to suck a fiber that remains in and around the region C.The injecting device 14 is located on a side of thetop roller 65b (atop roller 65b side) with respect to the region C, and thesuction device 15 is located on a side of thebottom roller 65a (abottom roller 65a side) with respect to the region C. Thetop roller 65b side means a region on a side where thetop roller 65b is arranged with the fiber passage as a reference when seen in an axial direction of the pair of front rollers 65 (a direction penetrating a page ofFIG. 3 ) and includes a region downstream of thetop roller 65b. Thebottom roller 65a side means a region on a side where thebottom roller 65a is arranged with the fiber passage as a reference when seen in the axial direction of the pair offront rollers 65 and includes a region downstream of thebottom roller 65a. - As illustrated in
FIGS. 1 and2 , theyarn accumulating device 50 is adapted to accumulate the travelling yarn Y between thepneumatic spinning device 7 and the windingdevice 12 by winding the travelling yarn Y around a yarn accumulating roller. Theyarn accumulating device 50 has a function to stably draw the yarn Y from thepneumatic spinning device 7, a function to accumulate the yarn Y fed from thepneumatic spinning device 7 to prevent the yarn Y from slackening, for example, when theyarn joining vehicle 3 performs a yarn joining operation, and a function to adjust tension of the yarn Y located downstream of theyarn accumulating device 50 to prevent variation in the tension of the downstream yarn Y from propagating to thepneumatic spinning device 7. - The winding
device 12 is adapted to wind the yarn Y produced by thepneumatic spinning device 7 around a bobbin B to form the package P. The windingdevice 12 includes acradle arm 21, a windingdrum 22, and atraverse device 23. Thecradle arm 21 is swingably supported by asupport shaft 24 and is adapted to bring a surface of the bobbin B or the package P each of which is rotatably supported by thecradle arm 21 into contact with a surface of the windingdrum 22 with an appropriate pressure. The windingdrum 22 is driven by an electric motor (not illustrated) provided to everyspinning unit 2, and rotates the bobbin B or the package P being in contact therewith. Thetraverse device 23 is adapted to be driven by ashaft 25 provided in common to the plurality of spinningunits 2 and to traverse the yarn Y at a predetermined width with respect to the rotating bobbin B or the rotating package P. - The
yarn joining vehicle 3 travels to aspinning unit 2 in which the yarn Y has been disconnected, and performs a yarn joining operation in such aspinning unit 2. Theyarn joining vehicle 3 includes asplicer 26, asuction pipe 27, and asuction mouth 28. Thesuction pipe 27 is swingably supported by asupport shaft 31. Thesuction pipe 27 sucks and catches a yarn end of the yarn Y from thepneumatic spinning device 7 and guides the caught yarn end to thesplicer 26. Thesuction mouth 28 is swingably supported by asupport shaft 32. Thesuction mouth 28 sucks and catches a yarn end of the yarn Y from the windingdevice 12 and guides the caught yarn end to thesplicer 26. Thesplicer 26 performs yarn joining of the guided yarn ends. - Next, operations relating to an adjustment of a length of a fiber bundle portion Y1 to be formed at a yarn end of the yarn Y will be described. As illustrated in
FIG. 5 , the fiber bundle portion Y1 means a region to which twists have not been applied at a yarn end of the yarn Y connected to the package P. Operations to form the fiber bundle portion Y1 are performed, for example, when spinning is interrupted upon detection of a yarn defect or when a package P is fully-wound and spinning is finished. - During spinning, air is injected from the plurality of
nozzles 74 to the fiber bundle F fed to the spinningchamber 73, and whirling flow is generated in the spinningchamber 73. Accordingly, twists are applied to the fiber bundle F fed to the spinningchamber 73, and the yarn Y is produced. The produced yarn Y is discharged from theexit 83 via thepassage 81. Fibers that did not become the yarn Y are collected into the collectingsection 77. During spinning, thepneumatic spinning device 7 is located at the spinning position. - When a yarn defect is detected by the
yarn monitoring device 8 during spinning, the yarn defect detection signal is transmitted to theunit controller 10. Upon receiving the yarn defect detection signal, theunit controller 10 controls the draft device 6 to stop driving of the pair of back rollers 61 (a drafting operation of the draft device 6). Since the pair offront rollers 65 is connected to a drive source (a drive source provided in common to pairs offront rollers 65 in other spinning units 2) different from a drive source of the pair ofback rollers 61, driving of the pair offront rollers 65 is maintained. Consequently, the fiber bundle F is disconnected between the pair ofback rollers 61 and the pair offront rollers 65. A timing at which theunit controller 10 controls the draft device 6 as described above is referred to as a "timing K to stop the drafting operation of the draft device 6". - The
unit controller 10 then controls thepneumatic spinning device 7 to stop injection of air from the plurality ofnozzles 74. When the injection of the air from the plurality ofnozzles 74 has been stopped, whirling flow in the spinningchamber 73 disappears and twists are not applied to the yarn end of the yarn Y. Consequently, the fiber bundle portion Y1 to which twists have not been applied is formed at the yarn end of the yarn Y. A timing at which theunit controller 10 controls thepneumatic spinning device 7 as described above is referred to as a "first timing L to stop injection of air". The first timing L is set by theunit controller 10 with the timing K to stop the drafting operation of the draft device 6 as a reference. Theunit controller 10 has a function as a setting section of the first timing L. - Subsequently, the
unit controller 10 controls thepneumatic spinning device 7 to start moving from the spinning position to the receded position (a movement process). A timing at which theunit controller 10 controls thepneumatic spinning device 7 as described above is referred to as a "second timing M to start movement of thepneumatic spinning device 7 from the spinning position to the receded position". The second timing M is set to be after an elapse of a predetermined period of time from the first timing L by theunit controller 10 so as to be linked with the first timing L to stop the injection of the air. Theunit controller 10 functions as a setting section of the second timing M. The second timing M is set such that thepneumatic spinning device 7 starts moving from the spinning position to the receded position after twists are applied to the yarn end of the yarn Y under a state in which thepneumatic spinning device 7 is located at the spinning position. - Subsequently, for example, the
unit controller 10 controls the injectingdevice 14 to inject air after thepneumatic spinning device 7 starts moving from the spinning position to the receded position (after the second timing M) (an injection process). A timing at which theunit controller 10 controls the injectingdevice 14 as described above is referred to as a "third timing N to inject air" . The third timing N is set to be after an elapse of a predetermined period of time from the second timing M by theunit controller 10 so as to be linked with the second timing M to start movement of thepneumatic spinning device 7 from the spinning position to the receded position. Theunit controller 10 has a function as a setting section of the third timing N. After thepneumatic spinning device 7 starts moving from the spinning position to the receded position, the air is injected to the fiber bundle F passing the region C between the draft device 6 and thepneumatic spinning device 7. The fiber bundle F is disconnected by the injected air. In such a manner, the fiber bundle F is disconnected between the pair ofback rollers 61 and the pair offront rollers 65, and is further disconnected by the injectingdevice 14. - Fibers that are generated when the fiber bundle F is disconnected are sucked by the
suction device 15. Theunit controller 10 then controls the injectingdevice 14 to stop the injection of the air before thepneumatic spinning device 7 reaches the receded position. - The
unit controller 10 further has a function as an adjusting section of the first timing L. Theunit controller 10 can adjust the first timing L by storing data selected by an operator via an input section (not illustrated) in the storage section and performing a control program in accordance with the selected data. When lengthening a length of the fiber bundle portion Y1, as illustrated inFIG. 6A , the first timing L is adjusted to be relatively early (for example, to be earlier than the first timing L illustrated inFIG. 6B ). Accordingly, since twists are not sufficiently applied to the yarn end of the yarn Y, the length of the fiber bundle portion Y1 becomes long. The length of the fiber bundle portion Y1 is lengthened, for example, in a case of reliably catching the yarn end of the yarn Y when performing the yarn joining operation. When shortening the length of the fiber bundle portion Y1, as illustrated inFIG. 6B , the first timing L is adjusted to be relatively delayed (for example, to be later than the first timing L illustrated inFIG. 6A ). Accordingly, since twists are sufficiently applied to the yarn end of the yarn Y, the length of the fiber bundle portion Y1 becomes short. The length of the fiber bundle portion Y1 is shortened, for example, in a case of preventing the fiber bundle portion Y1 from remaining at the yarn accumulating roller of theyarn accumulating device 50. In such a manner, the first timing L is adjusted by theunit controller 10 to be delayed when shortening the length of the fiber bundle portion Y1. - A case in which spinning is interrupted upon detection of a yarn defect has been described above, but similar operations are performed also in a case in which the package P is determined to be fully-wound and spinning is finished. However, in this case, the length of the fiber bundle portion Y1 is preferably shortened or the fiber bundle portion Y1 is preferably not formed such that a knot of the yarn Y is not disconnected when unwinding the package P by a warper in the following processing. As illustrated in
FIG. 6B , for example, the first timing L is thus preferably adjusted to be a late timing or a further late timing. - As described above, in the spinning machine 1 and a spinning method executed in the spinning machine 1, in a case where the drafting operation of the draft device 6 has been stopped, when the injection of air is stopped in the
pneumatic spinning device 7, twists are not appropriately applied to the yarn end of the yarn Y in thepneumatic spinning device 7, and the fiber bundle portion Y1 is formed at the yarn end of the yarn Y. In the spinning machine 1 and the spinning method, since the first timing L to stop the injection of the air in thepneumatic spinning device 7 when the drafting operation of the draft device 6 is stopped is adjusted, the length of the fiber bundle portion Y1 to be formed at the yarn end of the yarn Y can be adjusted. "Twists are not appropriately applied to the yarn end of the yarn Y" means that twists different from twists at the time of spinning are applied to the yarn end of the yarn Y or twists are not applied to the yarn end of the yarn Y. - Accordingly, the length of the fiber bundle portion Y1 can be adjusted, for example, such that the fiber bundle portion Y1 does not remain at the yarn accumulating roller of the
yarn accumulating device 50 located downstream of thepneumatic spinning device 7. Furthermore, the length of the fiber bundle portion Y1 can be adjusted such that the yarn end of the yarn Y can be reliably caught when performing the yarn joining operation. On the other hand, when the package P is fully-wound, the length of the fiber bundle portion Y1 can be shortened such that a knot of the yarn Y is not disconnected when unwinding the package P by the warper in the following process. - In the spinning machine 1, the first timing L is adjusted with the timing K to stop the drafting operation of the draft device 6 as a reference. With this configuration, the length of the fiber bundle portion Y1 to be formed at the yarn end of the yarn Y can be easily and appropriately adjusted.
- In the spinning machine 1, the first timing L is adjusted to be delayed when shortening the length of the fiber bundle portion Y1 to be formed at the yarn end of the yarn Y. With this configuration, since relation of the first timing L and the length of the fiber bundle portion Y1 is clear, the length of the fiber bundle portion Y1 to be formed at the yarn end of the yarn Y can be easily adjusted.
- In the spinning machine 1, the second timing M is set to be linked with the first timing L. With this configuration, since adjustment of the second timing M is not required to be performed separately from adjustment of the first timing L, the length of the fiber bundle portion Y1 to be formed at the yarn end of the yarn Y can be easily adjusted.
- The second timing M is set such that the
pneumatic spinning device 7 starts moving from the spinning position to the receded position after twists are applied to the yarn end of the yarn Y under the state in which thepneumatic spinning device 7 is located at the spinning position. With this configuration, since twists are reliably applied to the yarn end of the yarn Y without being disturbed by the movement of thepneumatic spinning device 7 from the spinning position to the receded position, the length of the fiber bundle portion Y1 to be formed at the yarn end of the yarn Y can be appropriately adjusted. At least one of the first timing L and the second timing M may be adjusted such that thepneumatic spinning device 7 starts moving from the spinning position to the receded position after twists are applied to the yarn end of the yarn Y while being located at the spinning position. - The spinning machine 1 includes the injecting
device 14 that injects air to the region C between the draft device 6 and thepneumatic spinning device 7. With this configuration, the fiber bundle F can be disconnected by controlling the injectingdevice 14 to inject the air. The length of the fiber bundle portion Y1 thus can be appropriately adjusted by adjusting the third timing N to inject the air from the injectingdevice 14. - The spinning machine 1 includes the
unit controller 10 that controls operations relating to the adjustment of the first timing L. With this configuration, the length of the fiber bundle portion Y1 can be automatically adjusted in accordance with a condition set for the case in which spinning is interrupted upon detection of a yarn defect, the case in which the package P is determined to be fully-wound and spinning is finished, or the like. - An embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment as long as it falls under the scope of the claims.
- In the above-described embodiment, the second timing M is set to be after an elapse of the predetermined period of time from the first timing L, but may be adjustable by the
unit controller 10. When lengthening the length of the fiber bundle portion Y1, as illustrated inFIG. 7A , the second timing M is adjusted to be relatively early (for example, to be earlier than the second timing M illustrated inFIG. 7B ). Accordingly, since twists are not sufficiently applied to the yarn end of the yarn Y, the length of the fiber bundle portion Y1 becomes long. The length of the fiber bundle portion Y1 is lengthened, for example, in the case of reliably catching the yarn end of the yarn Y when performing the yarn joining operation, or the like. On the other hand, when shortening the length of the fiber bundle portion Y1, as illustrated inFIG. 7B , the second timing M is adjusted to be relatively delayed (for example, to be later than the second timing M illustrated inFIG. 7A ). Accordingly, since twists are sufficiently applied to the yarn end of the yarn Y, the length of the fiber bundle portion Y1 becomes short. The length of the fiber bundle portion Y1 is shortened, for example, in the case of preventing the fiber bundle portion Y1 from remaining at the yarn accumulating roller of theyarn accumulating device 50, or the like. In such a manner, the second timing M may be adjusted by theunit controller 10 to be delayed when shortening the length of the fiber bundle portion Y1. - In the spinning machine 1 according to the above-described alternative embodiment and the spinning method executed in the spinning machine 1, in the case where the drafting operation of the draft device 6 has been stopped, when the
pneumatic spinning device 7 starts being moved from the spinning position to the receded position, twists are not appropriately applied to the yarn end of the yarn Y in thepneumatic spinning device 7, and the fiber bundle portion Y1 is formed at the yarn end of the yarn Y. In the spinning machine 1 and the spinning method thereof, since the second timing M to start movement of thepneumatic spinning device 7 from the spinning position to the receded position when the drafting operation of the draft device 6 is stopped is adjusted, the length of the fiber bundle portion Y1 to be formed at the yarn end of the yarn Y can be adjusted. Both of the first timing L and the second timing M also may be adjusted. - In the above-described embodiment, the third timing N is set to be after an elapse of the predetermined period of time from the second timing M, but may be adjustable by the
unit controller 10. When shortening the length of the fiber bundle portion Y1, as illustrated inFIG. 8A , the third timing N is adjusted to be relatively early (for example, to be earlier than the third timing N illustrated inFIG. 8B ). Accordingly, since a length of the yarn end of the yarn Y to be disconnected by the injectingdevice 14 becomes long, the length of the fiber bundle portion Y1 becomes short. The length of the fiber bundle portion Y1 is shortened, for example, in the case of preventing the fiber bundle portion Y1 from remaining at the yarn accumulating roller of theyarn accumulating device 50, or the like. On the other hand, when lengthening the length of the fiber bundle portion Y1, as illustrated inFIG. 8B , the third timing N is adjusted to be relatively delayed (for example, to be later than the third timing N illustrated inFIG. 8A ) . Accordingly, since the length of the yarn end of the yarn Y to be disconnected by the injectingdevice 14 becomes short, the length of the fiber bundle portion Y1 becomes long. The length of the fiber bundle portion Y1 is lengthened, for example, in the case of reliably catching the yarn end of the yarn Y when performing the yarn joining operation, or the like. In such a manner, the third timing N may be adjusted by theunit controller 10 to be early when shortening the length of the fiber bundle portion Y1. - In the above-described embodiment and the above-described alternative embodiment, the
unit controller 10 controls the operations relating to the adjustments of the first timing L, the second timing M, and the third timing N. However, an adjustment mechanism to adjust at least one of the first timing L, the second timing M, and the third timing N may be arranged separately from theunit controller 10, and an operator may directly adjust at least one of the first timing L, the second timing M, and the third timing N by such an adjustment mechanism without theunit controller 10. For example, in thepneumatic spinning device 7 in which a length of an air path that communicates to the plurality ofnozzles 74 can be adjusted, the length of the air path may be adjusted by the operator. Since a timing at which air is injected from the plurality ofnozzles 74 is varied by adjusting the length of the air path, the first timing L can be adjusted. Alternatively, in the spinning machine 1 in which positional relation of an actuator (an air cylinder, for example) adapted to move thepneumatic spinning device 7 to the spinning position and the receded position, and thepneumatic spinning device 7 can be adjusted, the positional relation may be adjusted by the operator. Since a timing at which the actuator starts acting on thepneumatic spinning device 7 is varied by adjusting the positional relation, the second timing M can be adjusted. In such a manner, at least one of the first timing L, the second timing M, and the third timing N may be directly adjusted without theunit controller 10. - In the above-described embodiment, the first timing L is adjusted with the timing K as a reference, but the first timing L may be adjusted with a timing at which the yarn defect detection signal is input from the
yarn monitoring device 8 as a reference. In the same manner, the second timing M may be adjusted with the timing at which the yarn defect detection signal is input from theyarn monitoring device 8 as a reference. - In the above-described embodiment, the injecting
device 14 is located on the side of thetop roller 65b with respect to the region C, and thesuction device 15 is located on the side of thebottom roller 65a with respect to the region C, but positions of the injectingdevice 14 and thesuction device 15 may be reversed. - In the above-described embodiment, the fiber bundle F is disconnected by injection of air from the injecting
device 14, but the injection of the air by the injectingdevice 14 is not required to be performed. - Various materials and shapes may be applied to a material and a shape of each component of the spinning machine 1 without being limited to the above-described material and shape. The
needle 75 may be omitted, and a downstream end of thefiber guiding section 71 may have a function of theneedle 75. Furthermore, the pair offront rollers 65 is not required to be connected to the drive source provided in common to the pairs offront rollers 65 inother spinning units 2, and drive force may be respectively applied from individual drive sources. Without being limited to the pair offront rollers 65, drive force may be respectively applied from individual drive sources to other pairs ofrollers
Claims (9)
- A spinning machine (1) comprising:a draft device (6) adapted to draft a fiber bundle (F); anda pneumatic spinning device (7) arranged movable to a spinning position and a receded position, and adapted to produce a yarn (Y) by applying twists to the drafted fiber bundle (F) by injecting air to a spinning chamber (73) while being located at the spinning position, the receded position being located further away from the draft device (6) than the spinning position,characterized in that the spinning machine (1) is configured to adjust at least one of a first timing (L) and a second timing (M), the first timing (L) being a timing at which injection of the air is stopped when a drafting operation of the draft device (6) is stopped, and the second timing (M) being a timing at which the pneumatic spinning device (7) starts being moved from the spinning position to the receded position when the drafting operation of the draft device (6) is stopped, so that a length of a fiber bundle portion to be formed at a yarn end of the yarn can be adjusted,and that the spinning machine comprises a control section (10) adapted to control an operation relating to the adjustment of at least one of the first timing (L) and the second timing (M).
- The spinning machine (1) according to claim 1, wherein the spinning machine (1) is configured to adjust at least one of the first timing (L) and the second timing (M) with a timing (K) to stop the draft device (6) as a reference.
- The spinning machine (1) according to claim 2, wherein the spinning machine (1) is configured to adjust the first timing (L) such that the period between the first timing (L) and the timing (K) to stop the draft device (6) is increased when shortening the length of the fiber bundle portion (Y1) to be formed at the yarn end of the yarn (Y).
- The spinning machine (1) according to claim 3, wherein the second timing (M) is set to be linked with the first timing (L).
- The spinning machine (1) according to any one of claim 1 through claim 4, wherein the spinning machine is configured to adjust at least one of the first timing (L) and the second timing (M) such that the pneumatic spinning device (7) starts moving from the spinning position to the receded position after twists are applied to a yarn end of the yarn (Y) under a state in which the pneumatic spinning device (7) is located at the spinning position.
- The spinning machine (1) according to any one of claim 1 through claim 5, further comprising an injecting device (14) adapted to inject air to a region (C) between the draft device (6) and the pneumatic spinning device (7).
- A spinning machine (1) comprising:a draft device (6) adapted to draft a fiber bundle (F); anda pneumatic spinning device (7) arranged movable to a spinning position and a receded position, and adapted to produce a yarn (Y) by applying twists to the drafted fiber bundle (F) by injecting air to a spinning chamber (73) while being located at the spinning position, the receded position being located further away from the draft device (6) than the spinning position, wherein, when a drafting operation of the draft device (6) is stopped, the spinning machine (1) is configured to stop injection of the air at a first timing (L) and to start moving the pneumatic spinning device from the spinning position to the receded position at a second timing (M),characterized in thatthe spinning machine (1) comprises an injecting device (14) adapted to inject air to a region (C) between the draft device (6) and the pneumatic spinning device (7),the spinning machine (1) is configured to adjust a third timing (N) at which the injection device (14) is controlled to inject air after the pneumatic spinning device (7) starts moving from the spinning position to the receded position, so that a length of a fiber bundle portion to be formed at a yarn end of the yarn can be adjusted, andthe spinning machine comprises a control section (10) adapted to control an operation relating to the adjustment of the first timing (N) .
- A spinning method executed in a spinning machine (1) comprising a draft device (6) adapted to draft a fiber bundle (F); and a pneumatic spinning device (7) arranged movable to a spinning position and a receded position, and adapted to produce a yarn (Y) by applying twists to the drafted fiber bundle (F) by injecting air to a spinning chamber (73) while being located at the spinning position, the receded position being located further away from the draft device (6) than the spinning position, the spinning method characterized by:
adjusting at least one of a first timing (L) and a second timing (M), the first timing (L) being a timing at which injection of the air is stopped when a drafting operation of the draft device (6) is stopped, and the second timing (M) being a timing at which the pneumatic spinning device (7) starts being moved from the spinning position to the receded position when the drafting operation of the draft device (6) is stopped, so that a length of a fiber bundle portion to be formed at a yarn end of the yarn can be adjusted. - A spinning method executed in a spinning machine (1) comprising a draft device (6) adapted to draft a fiber bundle (F); and a pneumatic spinning device (7) arranged movable to a spinning position and a receded position, and adapted to produce a yarn (Y) by applying twists to the drafted fiber bundle (F) by injecting air to a spinning chamber (73) while being located at the spinning position, the receded position being located further away from the draft device (6) than the spinning position, wherein, when a drafting operation of the draft device (6) is stopped, injection of the air is stopped at a first timing (L) and the pneumatic spinning device is started to be moved from the spinning position to the receded position at a second timing (M), characterized in that the spinning machine (1) comprises an injecting device (14) adapted to inject air to a region (C) between the draft device (6) and the pneumatic spinning device (7), and in that the spinning method comprises:
adjusting a timing (N) at which the injection device (14) is controlled to inject air after the pneumatic spinning device (7) starts moving from the spinning position to the receded position, so that a length of a fiber bundle portion to be formed at a yarn end of the yarn can be adjusted.
Applications Claiming Priority (1)
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JP2014108287A JP2015224397A (en) | 2014-05-26 | 2014-05-26 | Spinning machine and spinning method |
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EP2949793A2 EP2949793A2 (en) | 2015-12-02 |
EP2949793A3 EP2949793A3 (en) | 2016-05-11 |
EP2949793B1 true EP2949793B1 (en) | 2019-09-11 |
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JP2018090923A (en) * | 2016-12-01 | 2018-06-14 | 村田機械株式会社 | Spinning machine and spinning method |
EP3505661A1 (en) * | 2017-12-28 | 2019-07-03 | Murata Machinery, Ltd. | Spinning machine and spinning method |
CN109626132A (en) * | 2018-12-18 | 2019-04-16 | 青岛宏大纺织机械有限责任公司 | A kind of yarn blowpipe method and device |
EP3835467A1 (en) * | 2019-12-09 | 2021-06-16 | Saurer Intelligent Technology AG | Method for cleaning an air spinning device of a spinning unit, such an air spinning device and a thread forming unit for such an air spinning device |
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JPH07122167B2 (en) * | 1992-03-16 | 1995-12-25 | 村田機械株式会社 | Yarn splicing method for spinning device |
JP2973961B2 (en) * | 1997-01-13 | 1999-11-08 | 村田機械株式会社 | Spinning machine piecing method and apparatus |
JP2001131834A (en) * | 1999-08-24 | 2001-05-15 | Murata Mach Ltd | Spinning device |
JP2002155435A (en) * | 2000-11-15 | 2002-05-31 | Murata Mach Ltd | Piecing method and apparatus therefor in spinning machine |
JP2006144136A (en) | 2004-11-16 | 2006-06-08 | Murata Mach Ltd | Method for operating spinning apparatus and spinning apparatus |
JP2011038210A (en) * | 2009-08-11 | 2011-02-24 | Murata Machinery Ltd | Open-end spinning device and spinning machine with the open-end spinning device |
JP2011038225A (en) * | 2009-08-17 | 2011-02-24 | Murata Machinery Ltd | Spinning machine |
JP2013067885A (en) * | 2011-09-21 | 2013-04-18 | Murata Mach Ltd | Air spinning device, spinning unit, spinning machine and air spinning method |
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2014
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EP2949793A3 (en) | 2016-05-11 |
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