EP2463414A2 - Air spinning device and spinning apparatus including the same - Google Patents
Air spinning device and spinning apparatus including the same Download PDFInfo
- Publication number
- EP2463414A2 EP2463414A2 EP11192763A EP11192763A EP2463414A2 EP 2463414 A2 EP2463414 A2 EP 2463414A2 EP 11192763 A EP11192763 A EP 11192763A EP 11192763 A EP11192763 A EP 11192763A EP 2463414 A2 EP2463414 A2 EP 2463414A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- spindle
- nozzle
- air
- nozzle holder
- holder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 238000009987 spinning Methods 0.000 title claims abstract description 193
- 239000000835 fiber Substances 0.000 claims abstract description 128
- 238000004804 winding Methods 0.000 claims description 17
- 238000010586 diagram Methods 0.000 description 12
- 125000006850 spacer group Chemical group 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 239000003381 stabilizer Substances 0.000 description 9
- 230000009467 reduction Effects 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000012209 synthetic fiber Substances 0.000 description 5
- 229920002994 synthetic fiber Polymers 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
Classifications
-
- 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
- the present invention relates to an air spinning device and a spinning apparatus including the same.
- Air spinning devices that produce a spun yarn by twisting a fiber bundle by utilizing a swirling airflow are known in the art. Such air spinning devices supply air into a spinning chamber to generate a swirling airflow that causes fibers, which form a fiber bundle, to swing, thereby producing a spun yarn (see, for example, Japanese published unexamined application No. 2003-193337 and Japanese unexamined utility model application publication No. H4-131661 ).
- the produced spun yarn is likely to be influenced by the shape of a spinning chamber. Accordingly, the air spinning devices have a problem that a twisting firmness of the produced spun yarn varies if the shape of the spinning chamber changes due to shifting of attachment positions of a fiber guide, a nozzle block, etc., that define the spinning chamber. Therefore, there is a need for an air spinning device in which variations in the shape of the spinning chamber can be reduced by improving a precision of the attachment positions of the fiber guide and the nozzle block.
- the air spinning devices cause fibers to swing by utilizing a swirling airflow, and hence the spun yarn is likely to be influenced by the fiber characteristics of a fiber bundle. Moreover, in the air spinning devices, twisting firmness of the produced spun yarn varies according to the fiber characteristics, such as an average fiber length. Therefore, there is a need for an air spinning device in which the fiber guide and the nozzle block can be easily replaced which enables spinning to be performed according to the fiber characteristics.
- An air spinning device includes a fiber guide that has a fiber introducing passage that communicates with a spinning chamber, and guides a fiber bundle into a spinning chamber; a nozzle block that has an air hole that communicates with the spinning chamber, and guides air into the spinning chamber; a spindle that has a fiber passageway that communicates with the spinning chamber, and guides the fiber bundle twisted in the spinning chamber; a nozzle holder that holds the nozzle block while being in a state of abutment against the nozzle block; and a nozzle cap that immovably fixes the fiber guide and the nozzle block to the nozzle holder, the nozzle cap is adapted to be attached to the nozzle holder while being in a state of direct abutment against the nozzle holder.
- An air spinning device includes a fiber guide that has a fiber introducing passage that communicates with a spinning chamber, and guides a fiber bundle into a spinning chamber; a nozzle block that has an air hole that communicates with the spinning chamber, and guides air into the spinning chamber; a spindle that has a fiber passageway that communicates with the spinning chamber, and guides the fiber bundle twisted in the spinning chamber; a spindle holder that holds the spindle; and a spindle locking member that locks the spindle into the spindle holder with just one touch.
- a spinning apparatus includes an air spinning device according to the above aspect and a winding device that winds a spun yarn spun by the air spinning device into a package.
- the spinning unit 1 is a spinning apparatus that produces a spun yarn Y from a fiber bundle (hereinafter, "sliver") F and produces a package P.
- the spinning unit 1 includes a sliver supplying unit 4, a drafting device 5, an air spinning device 6, a yarn-defect detecting device 7, a tension stabilizer 8, and a winding device 9 that are arranged in this order along a feed direction of the sliver F and the spun yarn Y.
- the sliver supplying unit 4 supplies the sliver F, from which the spun yarn Y is to be produced, to the drafting device 5.
- the sliver supplying unit 4 includes a sliver casing 41 and a sliver guide (not shown).
- the sliver F stored in the sliver casing 41 is supplied to the drafting device 5 through the sliver guide.
- the drafting device 5 makes the thickness of the sliver F uniform by drafting the sliver F.
- the drafting device 5 includes four pairs of draft rollers, i.e., a pair of back rollers 51, a pair of third rollers 52, a pair of middle rollers 53, and a pair of front rollers 54 arranged in this order along the feed direction of the sliver F.
- the draft rollers 51 include a bottom roller 51A and a top roller 51B
- the draft rollers 52 include a bottom roller 52A and a top roller 52B
- the draft rollers 53 include a bottom roller 53A and a top roller 53B
- the draft rollers 54 include a bottom roller 54A and a top roller 54B.
- An apron band 53C is arranged around the bottom roller 53A and another apron band 53C is arranged around the top roller 53B of the pair of middle rollers 53.
- the apron bands 53C are made of material such as leather or synthetic rubber.
- the bottom rollers 51A, 52A, 53A, and 54A are rotated in the same direction by a driving device (not shown).
- the top rollers 51B, 52B, 53B, and 54B are rotated in the same direction by rotations of the bottom rollers 51A, 52A, 53A, and 54A.
- the pairs of draft rollers 51, 52, 53, and 54 are configured to be in order of an increasing rotation speed along the feed direction of the sliver F.
- a feeding speed of the sliver F pinched between the pairs of draft rollers 51, 52, 53, and 54 increases each time the sliver F passes between one of the pairs of draft rollers 51, 52, 53, and 54, to thus be drafted between adjacent pairs of the draft rollers.
- the drafting device 5 can make the thickness of the sliver F uniform by drafting the sliver F in this way.
- the air spinning device 6 twists the drafted sliver F, thereby producing the spun yarn Y.
- the air spinning device 6 includes a fiber guide 61, a spindle 62, and a nozzle block 63.
- solid arrows shown in FIG. 2 indicate the feed direction of the sliver F and the spun yarn Y.
- Hollow arrows shown in FIG. 2 indicate an airflow direction of supplied air.
- the fiber guide 61 is a member that partially defines a spinning chamber SC.
- the sliver F drafted by the drafting device 5 passes through the fiber guide 61 to the spinning chamber SC. More specifically, the sliver F passes through a fiber introducing passage 61g, which communicates with the spinning chamber SC, of the fiber guide 61 to the spinning chamber SC.
- a needle 61n serving as a guide of the sliver F by causing the sliver F to run therealong is provided in the fiber guide 61 in a manner to project into the spinning chamber SC.
- the spindle 62 is a member that partially defines the spinning chamber SC.
- the spindle 62 guides the sliver F twisted in the spinning chamber SC, that is, the spun yarn Y, to the yarn-defect detecting device 7. More specifically, the spindle 62 guides the spun yarn Y through a fiber passageway 62s, which communicates with the spinning chamber SC, to the yarn-defect detecting device 7.
- the yarn-defect detecting device 7 is arranged on a downstream side in a yarn feed direction.
- the nozzle block 63 is a member that partially defines the spinning chamber SC.
- the nozzle block 63 supplies pressurized air generated by an air supply source AB, which is described later, to the spinning chamber SC. More specifically, the nozzle block 63 guides the air through air holes 63a, which communicate with the spinning chamber SC, into the spinning chamber SC.
- the air holes 63a defined in the nozzle block 63 communicate with the spinning chamber SC such that air jetted through the air holes 63a flows in the same direction around a central axis of the spinning chamber SC. As a result, a swirling airflow is generated inside the spinning chamber SC (see the hollow arrows shown in FIG. 3 ).
- the spinning chamber SC is described in more detail below.
- the spinning chamber SC is a space surrounded by the fiber guide 61, the spindle 62, and the nozzle block 63. More specifically, the spinning chamber SC is a space surrounded by the substantially conical spindle 62 that is inserted from one side relative to a substantially conical through hole 64h in the nozzle block 63 and the fiber guide 61 attached onto the other side of the nozzle block 63.
- the spinning chamber SC is divided into a space SC1 provided between the fiber guide 61 and the spindle 62 and a space SC2 provided between the spindle 62 and the nozzle block 63.
- space SC1 trailing-end portions of fibers that form the sliver F are turned over (see long dashed double-short dashed lines in FIGS. 2 and 3 ) by the swirling airflow.
- the turned-over trailing-end portions of the fibers of the sliver F are swung (see long dashed double-short dashed lines in FIGS. 2 and 3 ) by the swirling airflow.
- the trailing-end portions of the fibers of the sliver F that runs along the needle 61n are turned over and wound around central fibers one after another.
- the air spinning device 6 is capable of twisting the sliver F by utilizing a swirling airflow in this way, thereby producing the spun yarn Y.
- the air spinning device 6 is configured without the needle 61n.
- a downstream edge of the fiber guide 61 performs a function of the needle 61n. Even though the air spinning device 6 is configured without the needle 61n, the same object and effect according to the present invention are achieved.
- the yarn-defect detecting device 7 detects a defect produced in the spun yarn Y.
- the yarn-defect detecting device 7 includes a light source (not shown), a light-receiver (not shown), and a casing (not shown).
- the light source is a semiconductor device, or, put another way, a light-emitting diode, that emits light in response to application of forward voltage thereto.
- the light source is arranged so as to illuminate the spun yarn Y with the light emitted from the light source.
- the light-receiver is a semiconductor device, or, put another way, a phototransistor, that can control electric current with optical signals.
- the light-receiver is arranged so as to receive the light emitted from the light source.
- the casing is a member that holds the light source and the light-receiver at predetermined positions.
- a yarn passage, through which the spun yarn Y passes, is defined in the casing.
- the casing holds the light source and the light-receiver such that the light source and the light-receiver face each other with the spun yarn Y therebetween.
- an amount of light received by the light-receiver can be calculated by subtracting light shielded by the spun yarn Y from the light emitted from the light source to illuminate the spun yarn Y.
- the yarn-defect detecting device 7 is capable of measuring the amount of received light according to yarn thickness and therefore can detect a defect in the spun yarn Y.
- Defects that can be detected by the yarn-defect detecting device 7 include anomalies, for example, that a portion of the spun yarn Y is too thick or too thin, and a foreign matter, such as a polypropylene foreign matter, interposed into the spun yarn Y.
- the yarn-defect detecting device 7 can adopt an electrical capacitance sensor in lieu of the optical sensor described above.
- the tension stabilizer 8 maintains proper tension on the spun yarn Y and stabilizes the tension. As shown in FIG. 4 , the tension stabilizer 8 includes a roller 81, a power output section 82, and an unwinding member 83. Note that arrows shown in FIG. 6 indicate the feed direction of the spun yarn Y.
- the roller 81 is a substantially cylindrical rotary member used in pulling out the spun yarn Y from the air spinning device 6 and winding the spun yarn Y around itself.
- the roller 81 is arranged on a rotary shaft 82a of the power output section 82 and rotated by the power output section 82.
- the spun yarn Y pulled out from the air spinning device 6 is wound around an outer peripheral surface of the roller 81.
- the power output section 82 As the power output section 82, an electric motor that is driven on electric power supplied thereto is used.
- the power output section 82 rotates the roller 81 while maintaining the rotation speed of the roller 81 at a predetermined value. This makes it possible to wind the spun yarn Y around the roller 81 at a constant winding speed.
- the unwinding member 83 is a threading member that rotates in combination with or separately from the roller 81 to thereby assist unwinding of the spun yarn Y.
- the unwinding member 83 is provided on its one end to a rotary shaft 84 of the roller 81. A portion on the other end of the unwinding member 83 is curved toward the outer peripheral surface of the roller 81. By hooking the spun yarn Y on the curved portion, the unwinding member 83 unwinds the spun yarn Y from the roller 81.
- a permanent magnet (not shown) that exerts a resisting force against rotation of the unwinding member 83 is provided at a basal portion of the rotary shaft 84, to which the unwinding member 83 is attached.
- the unwinding member 83 configured in this way rotates in combination with the roller 81 when a tension placed on the spun yarn Y is relatively weak and overcome by the resisting force. In contrast, the unwinding member 83 rotates separately from the roller 81 when the tension placed on the spun yarn Y is relatively strong to overcome the resisting force.
- the tension stabilizer 8 can cause the unwinding member 83 to rotate in combination with or separately from the roller 81 depending on the tension placed on the spun yarn Y, thereby adjusting an unwinding speed of the spun yarn Y.
- the tension stabilizer 8 maintains a proper tension on the spun yarn Y and stabilizes the tension in this way.
- the tension stabilizer 8 is operative to pull out the spun yarn Y from the air spinning device 6.
- the spun yarn Y is pulled out by a delivery roller and a nip roller by arranging them, for example, on a downstream side of the air spinning device 6.
- the tension stabilizer 8 is arranged on the downstream side of the delivery roller and the nip roller to wind and store the spun yarn Y.
- the tension stabilizer 8 is not provided and the spun yarn Y is pulled out by the winding device 9.
- the winding device 9 winds the spun yarn Y to thereby form a substantially cylindrical (cheese-shaped) package P.
- the winding device 9 includes a driving roller 91 and a cradle (not shown).
- the cradle rotatably supports a bobbin 92.
- the driving roller 91 is a rotary member that rotates to cause the bobbin 92 and the package P to be rotated by rotation of the driving roller 91.
- the driving roller 91 adjusts its rotation speed according to change in the outer diameter of the package P, thereby maintaining the circumferential velocity of the package P constant. This makes it possible to wind the spun yarn Y on the bobbin 92 at a constant winding speed.
- the bobbin 92 is a substantially cylindrical rotary member around which the spun yarn Y is wound.
- the bobbin 92 is rotated by the rotation of the driving roller 91 that rotates in contact with the outer peripheral surface of any one of the bobbin 92 and the package P.
- a traversing device (not shown) causes the spun yarn Y to be traversed to prevent unbalanced winding of the spun yarn Y on the package P.
- the spun yarn Y introduced to the bobbin 92 is wound, without being unbalanced, on the outer peripheral surface of the bobbin 92.
- the winding device 9 can form the substantially cylindrical (cheese-shaped) package P in this way.
- the package P to be formed by the winding device 9 is not limited to the substantially cylindrical (cheese-shaped) package P shown in FIG. 1 .
- the winding device 9 can also form the package P having a substantially conical shape.
- FIG. 12 is a side view of the conventional air spinning device 106.
- the nozzle block 163 is supported by a nozzle holder 164 in a state in which the nozzle block 163 is engaged into a through hole 164h of the nozzle holder 164 and a through hole 165h of a spacer 165. More specifically, the nozzle block 163 is engaged into the through hole 164h of the nozzle holder 164 and the through hole 165h of the spacer 165, and supported by the nozzle holder 164 in a state in which a locking surface 163p of the nozzle block 163 abuts against the spacer 165.
- the fiber guide 161 is fitted with an upper end surface (an upstream side end surface in a fiber-bundle running direction) of the nozzle block 163. More specifically, the fiber guide 161 is supported with a lower end portion (a downstream end surface in the fiber-bundle running direction) thereof fitted with a recess provided on the upper end surface of the nozzle block 163.
- the fiber guide 161 and the nozzle block 163 that are fitted with each other are immovably fixed to the nozzle holder 164 via the spacer 165 by a nozzle cap 166. More specifically, the fiber guide 161 and the nozzle block 163 are immovably fixed to the spacer 165 and the nozzle holder 164 by the nozzle cap 166 with pawls thereof grasping the fiber guide 161.
- the fiber guide 161 and the nozzle block 163 are fixed onto the spacer 165 first, and then the spacer 165 is fixed to the nozzle holder 164.
- the air spinning device 106 and the pair of front rollers 54 are very close to each other so that it is difficult for an operator to directly fix the fiber guide 161 and the nozzle block 163 to the nozzle holder 164.
- a common nozzle holder is provided for two adjacent air spinning devices 106 and it is necessary to use the spacer 165 for attaching the fiber guide 161 and the nozzle block 163 to the air spinning device 106.
- the spacer 165 is provided between the locking surface 163p of the nozzle block 163 and the nozzle holder 164, it is possible to change the attachment positions of the fiber guide 161 and the nozzle block 163 by replacing the spacer 165 with an appropriate spacer.
- a tolerance of the spacer 165 is added to tolerances of the fiber guide 161, the nozzle block 163, and the nozzle cap 166, a precision of the attachment positions of the fiber guide 161 and the nozzle block 163 is likely to reduce.
- a distance D between the fiber guide 161 and a spindle 162 is shorter than a predetermined value, trailing-end portions of the synthetic fibers forming the sliver F are hard to be turned over. As a result, the spun yarn Y that is loosely twisted is produced. More specifically, if the distance D between the fiber guide 161 and the spindle 162 is short, only a small number of the trailing-end portions of the synthetic fibers forming the sliver F are moved by and along the swirling airflow. This makes it difficult to turn over a sufficient number of the trailing-end portions. Accordingly, the number of the synthetic fibers forming the sliver F that are swung and sufficiently wound around the central fibers is reduced. As a result, a loosely twisted spun yarn (loose yarn) Y is produced.
- the distance D between the fiber guide 161 and the spindle 162 is equal to the predetermined value, trailing-end portions of the fibers forming the sliver F can be easily turned over. Consequently, the spun yarn Y that is firmly twisted is produced. More specifically, if the distance D between the fiber guide 161 and the spindle 162 is equal to the predetermined value, the trailing-end portions of the fibers forming the sliver F are moved by and along the swirling airflow easily, and therefore the trailing-end portions of the fibers are easily turned over. Accordingly, the fibers that are moved by and along the swirling airflow can be sufficiently wound around central fibers. Consequently, a firmly-twisted spun yarn (firm yarn) Y is produced.
- both ends of the synthetic fibers forming the sliver F are swung in the spinning chamber SC without being restricted by either of the fiber guide 161 and the spindle 162. Accordingly, the synthetic fibers are discharged to the outside of the air spinning device 106 more frequently. As a result, fiber loss increases, which is disadvantageous.
- the distance D increases, the volumetric capacity of the spinning chamber SC increases, and hence the amount of air that needs to be used in producing the swirling airflow also increases. Accordingly, the need for increasing the size of the air supply source arises. This requires upsizing of the spinning unit, which is also disadvantageous.
- the spun yarn Y produced by the air spinning device 106 is likely to be influenced by the shape of the spinning chamber SC because the air spinning device 106 causes the fibers to swing by utilizing the swirling airflow. If the shape of the spinning chamber SC changes due to shifting of the attachment positions of the fiber guide 161, the nozzle block 163, etc., that define the spinning chamber SC, the twisting firmness of the produced spun yarn Y is likely to vary. Furthermore, the fiber loss is also likely to increase. Therefore, there is a need of an air spinning device in which variations in the shape of the spinning chamber SC can be reduced by improving the precision of the attachment positions of the fiber guide and the nozzle block.
- FIG. 5 is a side view of the air spinning device 6 according to the embodiment of the present invention.
- the nozzle block 63 is supported in a state in which the nozzle block 63 is engaged into the through hole 64h of a nozzle holder 64. More specifically, the nozzle block 63 is engaged into the through hole 64h of the nozzle holder 64, and supported in a state in which a locking surface 63p of the nozzle block 63 abuts against the nozzle holder 64.
- the fiber guide 61 is fitted with an upper end surface (an upstream side end surface in the fiber-bundle running direction) of the nozzle block 63. More specifically, the fiber guide 61 is supported with a lower end portion (a downstream side end surface in the fiber-bundle running direction) thereof fitted with the recess provided on the upper end surface of the nozzle block 63.
- the fiber guide 61 and the nozzle block 63 are fitted with each other and fixed to the nozzle holder 64 by a nozzle cap 66. More specifically, the fiber guide 61 and the nozzle block 63 are directly fixed to the nozzle holder 64 by the nozzle cap 66 with pawls thereof grasping the fiber guide 61.
- This structure enables improvement in a precision of an attachment position of the nozzle block 63; because, the nozzle block 63 is fixed by the nozzle cap 66 with the locking surface 63p of the nozzle block 63 abutting against the nozzle holder 64 and the nozzle cap 66 directly abutting against the nozzle holder 64.
- a precision of an attachment position of the fiber guide 61 that is fixed in a state of being fitted into the nozzle block 63 also improves.
- the quality of the spun yarn Y can be improved by reducing the variations in the shape of the spinning chamber SC.
- the fiber guide 61 and the nozzle block 63 can be fixed with a simple structure, cost reduction can also be realized.
- the air spinning device 6 causes the fibers to swing by utilizing the swirling airflow, and therefore, the spun yarn Y produced by the air spinning device 6 is likely to be influenced by the fiber characteristics. Accordingly, the twisting firmness of the produced spun yarn Y may vary according to the fiber characteristics, such as, an average fiber length. Therefore, there is a need for an air spinning device that allows the fiber guide and the nozzle block to be easily replaced, and enables spinning according to the fiber characteristics.
- the nozzle holder 64 of the air spinning device 6 includes a first nozzle holder member 64A and a second nozzle holder member 64B.
- a solid arrow shown in FIG. 5 indicates directions of attachment and detachment of the first nozzle holder member 64A.
- the fiber guide 61 and the nozzle block 63 are immovably fixed to the first nozzle holder member 64A by the nozzle cap 66.
- the spindle 62 inserted into the through hole 64h of the nozzle block 63 is locked by abutment of a spindle cap 68 that is described later against the first nozzle holder member 64A.
- the second nozzle holder member 64B is rotatably coupled to a shaft SH (supporting member) of the spinning unit 1.
- the first nozzle holder member 64A is detachably attached to one end of the second nozzle holder member 64B. More specifically, the first nozzle holder member 64A can be attached to or detached from the second nozzle holder member 64B by tightening or removing two bolts BT (see FIG. 6 ).
- the first nozzle holder member 64A to which the fiber guide 61 and the nozzle block 63 are immovably fixed is rendered detachable. Therefore, the fiber guide 61 and the nozzle block 63 can be easily replaced. Consequently, the air spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved.
- FIG. 6 is a top view of the air spinning device 6 according to the embodiment of the present invention.
- An air-guiding passage 64p that guides the air pressure-fed from the air supply source AB to the spinning chamber SC includes a first air-guiding passage 64Ap provided in the first nozzle holder member 64A and a second air-guiding passage 64Bp provided in the second nozzle holder member 64B.
- Hollow arrows shown in FIG. 6 indicate a direction of flow of air and a solid arrow shown in FIG. 6 indicates the directions of attachment and detachment of the first nozzle holder member 64A.
- the first air-guiding passage 64Ap communicates with an air chamber AC (see FIG. 5 ) via a coupling member 64Ac attached to one end of the first nozzle holder member 64A.
- the air guided to the air chamber AC is supplied to the spinning chamber SC through the air holes 63a of the nozzle block 63.
- the second air-guiding passage 64Bp communicates with a boss hole member 64Bh provided at one end of the second nozzle holder member 64B via a coupling member 64Bc attached to a side edge of the second nozzle holder member 64B.
- the first air-guiding passage 64Ap communicates with the second air-guiding passage 64Bp. More specifically, when the first nozzle holder member 64A is attached to the second nozzle holder member 64B, the coupling member 64Ac of the first nozzle holder member 64A is inserted into the boss hole member 64Bh of the second nozzle holder member 64B; therefore, the first air-guiding passage 64Ap communicates with the second air-guiding passage 64Bp.
- the first nozzle holder member 64A can be detached without having to remove a pipe AH that extends from the air supply source AB. Therefore, the fiber guide 61 and the nozzle block 63 can be easily replaced. Consequently, the air spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved. Because the pipe AH extending from the air supply source AB does not need to be removed, mixing of contaminants into the air-guiding passage 64p (64Ap and 64Bp) can be prevented and the quality of the spun yarn Y can be improved.
- FIG. 7A is a magnified side view of the spindle 62 of the air spinning device 6 according to the embodiment of the present invention.
- FIG. 7B is a cross-sectional view of the spindle 62 taken along a line X-X shown in FIG. 7A .
- the spindle 62 is supported by a spindle holder 67 with a projection thereof engaged into the spindle 62. More specifically, the spindle 62 is supported by the spindle holder 67 such that the projection provided on an upper end surface (the upstream end surface in the fiber-bundle running direction) of the spindle holder 67 is engaged into a lower end (the downstream end surface in the fiber-bundle running direction) of the spindle 62.
- the spindle 62 is locked in the spindle holder 67 by the spindle cap 68 that functions as a spindle locking member. More specifically, the spindle 62 is locked in the spindle holder 67 by the spindle cap 68 with pawls thereof grasping a locking surface 62p of the spindle 62.
- a female screw part is provided in the spindle cap 68 and the spindle cap 68 is threaded onto a male screw part of the spindle holder 67.
- the spindle 62 can be locked in the spindle holder 67 with just one touch merely by threading in the spindle cap 68, the spindle 62 can be easily replaced. Consequently, the air spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved.
- the spindle 62 can be locked in the spindle holder 67 with a simple structure; therefore, cost reduction can be realized.
- a projection 67u provided on the spindle holder 67 meshes with a recess 68u provided in the spindle cap 68 when the spindle cap 68 is threaded onto the spindle holder 67.
- the projection 67u is provided on the spindle cap 68 instead of on the spindle holder 67 and the recess 68u is provided in the spindle holder 67 instead of in the spindle cap 68.
- the spindle cap 68 is threaded until the projection 67u meshes with the recess 68u, a tightening torque reaches a predetermined value. Therefore, the spindle 62 can be easily locked and easily replaced. Consequently, the air spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved.
- the spindle cap 68 is made of resin; therefore, the spindle cap 68 deforms while being threaded in and the projection 67u meshes with the recess 68u. Therefore, the spindle 62 can be locked in the spindle holder 67 with just one touch without having to use a tool. Consequently, a time required for the operator to replace the spindle 62 is reduced and an operation efficiency of the spinning unit 1 is improved.
- the spindle 162 is locked to a spindle holder 167 using bolts.
- the conventional air spinning device 106 is arranged very close to the drafting device, and there is a lack of adequate working space for carrying out replacement of the spindle 162.
- it is difficult to perform operations using tools, and locking the spindle 162 in the spindle holder 167 with the bolts.
- no operations necessitate a use of a tool. Therefore, the spindle 62 can be locked even if there is a narrow working space.
- the operator my drop the bolts by mistake.
- the spindle 62 is locked in the spindle holder 67 by threading in the spindle cap 68 as in the present embodiment, the number of components required for locking the spindle 62 in the spindle holder 67 is less, and as a result, the spindle 62 can be easily locked.
- the spindle 62 is locked using a hook member Ho without using the spindle cap 68.
- the hook member Ho that is a spindle locking member enables the spindle 62 to be easily locked, and easily replaced.
- the air spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved. Because the spindle 62 can be locked with a simple structure, cost reduction can also be realized.
- FIG. 9A is a side view of the air spinning device 6 according to the embodiment of the present invention and FIG. 9B is a front view of the air spinning device 6 from a direction of an arrow Y shown in FIG. 9A .
- the second nozzle holder member 64B of the nozzle holder 64 is rotatably coupled to the shaft SH (supporting member) of the spinning unit 1.
- the shaft SH supports the nozzle holder 64 so as to be movable towards or away from the wall surface W that is arranged facing the nozzle holder 64.
- An urging member SP that urges the nozzle holder 64 towards the wall surface W is attached to the second nozzle holder member 64B of the nozzle holder 64.
- An urging force acts on the nozzle holder 64 such that the nozzle holder 64 moves towards the wall surface W that is arranged facing the nozzle holder 64.
- a solid arrow shown in FIG. 9A indicates a direction of the urging force that acts on the nozzle holder 64.
- the stopper 64s is provided on the first nozzle holder member 64A of the nozzle holder 64.
- the stopper 64s is provided so as to be protruding towards the wall surface W direction from an upper surface of the first nozzle holder member 64A.
- the stopper 64s abuts against the wall surface W, thereby locking the nozzle holder 64.
- a dial 64D that includes a plurality of the stoppers 64s having different shapes in a peripheral direction may be provided on the nozzle holder 64 and the stopper 64s that abuts against the wall surface W can be switched. More specifically, the stoppers 64s having different shapes are formed such that a protrusion length of each of the stoppers 64s from a surface of the nozzle holder 64 is different.
- the dial 64D is switched such that the nozzle holder 64 is locked by the stopper 64s having a long protrusion length.
- the dial 64D is switched such that the nozzle holder 64 is locked by the stopper 64s having a short protrusion length.
- the locking position of the nozzle holder 64 can be changed by switching to any of the stoppers 64s. Consequently, the air spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved.
- a structure can be provided in which the locking position of the nozzle holder 64 can be changed by extending or retracting the stopper 64s (see an arrow in FIG. 11 ). Consequently, the air spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved.
- the package P can be produced with high quality spun yarn Y and cost reduction can be realized.
- the spun yarn Y produced in each spinning unit 1 is required to be of the same quality.
- variation in the quality of the spun yarn Y among the spinning units 1 can be reduced.
- the sliver F is fed from an upward direction to a downward direction.
- the present invention is not to be thus limited.
- cans in which the sliver F is stored can be arranged in a lower portion of a machine base and the winding device 9 can be arranged in an upper portion of the machine base.
- An air spinning device includes a fiber guide, a nozzle block, a spindle, a nozzle holder, and a nozzle cap.
- the nozzle holder holds the nozzle block while being in a state of abutment against the nozzle block.
- the nozzle cap fixes the fiber guide and the nozzle block to the nozzle holder, and is attached to the nozzle holder while being in a state of direct abutment against the nozzle holder.
- the nozzle holder includes a first nozzle holder member and a second nozzle holder member.
- the first nozzle holder member holds the nozzle block and has the nozzle cap attached thereon.
- the second nozzle holder member supports the first nozzle holder member.
- the first nozzle holder member is detachably attached to the second nozzle holder member.
- the first nozzle holder member includes a first air-guiding passage that guides the air into the spinning chamber.
- the second nozzle holder member includes a second air-guiding passage that guides the air that is pressure-fed from an air supply source.
- the first air-guiding passage and the second air-guiding passage communicate with each other when the first nozzle holder member is attached to the second nozzle holder member.
- An air spinning device includes a fiber guide, a nozzle block, a spindle, a spindle holder, and a spindle locking member.
- the spindle holder holds the spindle.
- the spindle locking member locks the spindle into the spindle holder with just one touch.
- the spindle locking member is threaded with respect to the spindle holder while being in a state of abutment against the spindle.
- the spindle holder has a recess or a projection.
- the spindle locking member has a projection or a recess.
- the spindle holder is held in the spindle locking member by a meshing of the recess/projection of the spindle holder with the projection/recess of the spindle locking member.
- the air spinning device includes a supporting member, a stopper, and an urging member.
- the supporting member supports the nozzle holder so as to enable the nozzle holder to move towards or away from a wall surface facing the nozzle holder.
- the stopper that positions the nozzle holder by abutting against the wall surface is provided on the nozzle holder.
- the urging member urges the nozzle holder towards the wall surface.
- a plurality of the stoppers of different shapes is provided on the nozzle holder, and a switching structure is provided that enable switching of the stopper that abuts against the wall surface.
- a spinning apparatus includes an air spinning device according to any one of the first to the eight aspects of the present invention, and a winding device that winds a spun yarn spun by the air spinning device into a package.
- a nozzle cap which is attached to a nozzle holder while being in a state of direct abutment against the nozzle holder, fixes a nozzle block while the nozzle block is in a state of abutment against the nozzle holder. Therefore, there is improved precision of an attachment position of the nozzle block. Consequently, a precision of an attachment position of a fiber guide, which is also fixed in a state of being fitted into the nozzle block, also improves. Thus, variations in a shape of a spinning chamber can be reduced and a quality of spun yarns can be improved. Furthermore, the fiber guide and the nozzle block are fixed to the nozzle holder with a simple structure. Consequently, cost reduction is realized.
- a first nozzle holder member to which the fiber guide and the nozzle block are fitted, is detachable, enabling the fiber guide and the nozzle block to be easily replaced. Therefore, spinning can be performed according to fiber characteristics, and thereby the quality of the spun yarns can be improved.
- the first nozzle holder member can be detached without having to remove a pipe extending from an air supply source. Consequently, the fiber guide and the nozzle block can be easily replaced. Therefore, spinning can be performed according to the fiber characteristics, and thereby the quality of the spun yarns can be improved. Furthermore, because the pipe extending from the air supply source needs not be removed, contaminants can be prevented from entering an air guiding passage, and therefore, the quality of the spun yarns can be improved.
- a spindle is locked in a spindle holder with a simple structure. Consequently, cost reduction is realized.
- the spindle can be locked in the spindle holder merely by threading a spindle locking member, the spindle can be easily replaced. Therefore, spinning can be performed according to the fiber characteristics, and thereby the quality of the spun yarns can be improved.
- a predetermined clamping torque is reached by threading in the spindle locking member until a projection and a recess mesh. Consequently, the spindle can be easily locked and easily replaced. Therefore, spinning can be performed according to the fiber characteristics, and thereby the quality of the spun yarns can be improved.
- the nozzle holder which is subjected to an urging force, is locked with a stopper, a play of the nozzle holder can be suppressed and a precision of a positioning of the nozzle holder is improved. Consequently, a precision of positions of the fiber guide and the nozzle block, which are fixed to the nozzle holder, relative to the spindle also improves. Therefore, variations in the shape of the spinning chamber can be reduced and the quality of the spun yarns can be improved.
- a locking position of the nozzle holder can be changed by switching to any of the stoppers.
- spinning can be performed according to the fiber characteristics, and thereby the quality of the spun yarns can be improved.
- packages of high quality spun yarns are produced, and cost reduction is realized.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
- The present invention relates to an air spinning device and a spinning apparatus including the same.
- Air spinning devices that produce a spun yarn by twisting a fiber bundle by utilizing a swirling airflow are known in the art. Such air spinning devices supply air into a spinning chamber to generate a swirling airflow that causes fibers, which form a fiber bundle, to swing, thereby producing a spun yarn (see, for example, Japanese published unexamined application No.
2003-193337 H4-131661 - It is an object of the present invention to provide an air spinning device in which variations in the shape of a spinning chamber can be reduced by improving a precision of attachment positions of a fiber guide and a nozzle block, and that allows the fiber guide and the nozzle block to be easily replaced, and enables spinning according to fiber characteristics. It is a further object of the present invention to provide a spinning apparatus that includes such an air spinning device.
- These objects are achieved an air spinning device according to claim 1, and by a spinning apparatus according to claim9.
- Since air spinning devices cause fibers to swing by utilizing a swirling airflow, the produced spun yarn is likely to be influenced by the shape of a spinning chamber. Accordingly, the air spinning devices have a problem that a twisting firmness of the produced spun yarn varies if the shape of the spinning chamber changes due to shifting of attachment positions of a fiber guide, a nozzle block, etc., that define the spinning chamber. Therefore, there is a need for an air spinning device in which variations in the shape of the spinning chamber can be reduced by improving a precision of the attachment positions of the fiber guide and the nozzle block.
- The air spinning devices cause fibers to swing by utilizing a swirling airflow, and hence the spun yarn is likely to be influenced by the fiber characteristics of a fiber bundle. Moreover, in the air spinning devices, twisting firmness of the produced spun yarn varies according to the fiber characteristics, such as an average fiber length. Therefore, there is a need for an air spinning device in which the fiber guide and the nozzle block can be easily replaced which enables spinning to be performed according to the fiber characteristics.
- An air spinning device according to an aspect of the present invention includes a fiber guide that has a fiber introducing passage that communicates with a spinning chamber, and guides a fiber bundle into a spinning chamber; a nozzle block that has an air hole that communicates with the spinning chamber, and guides air into the spinning chamber; a spindle that has a fiber passageway that communicates with the spinning chamber, and guides the fiber bundle twisted in the spinning chamber; a nozzle holder that holds the nozzle block while being in a state of abutment against the nozzle block; and a nozzle cap that immovably fixes the fiber guide and the nozzle block to the nozzle holder, the nozzle cap is adapted to be attached to the nozzle holder while being in a state of direct abutment against the nozzle holder.
- An air spinning device according to another aspect of the present invention includes a fiber guide that has a fiber introducing passage that communicates with a spinning chamber, and guides a fiber bundle into a spinning chamber; a nozzle block that has an air hole that communicates with the spinning chamber, and guides air into the spinning chamber; a spindle that has a fiber passageway that communicates with the spinning chamber, and guides the fiber bundle twisted in the spinning chamber; a spindle holder that holds the spindle; and a spindle locking member that locks the spindle into the spindle holder with just one touch.
- A spinning apparatus according to still another aspect of the present invention includes an air spinning device according to the above aspect and a winding device that winds a spun yarn spun by the air spinning device into a package.
- The above and other objects, features, advantages and technical and industrial significance of this invention will be better understood by reading the following detailed description of presently preferred embodiments of the invention, when considered in connection with the accompanying drawings.
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FIG. 1 is a schematic diagram of a structure of a spinning unit according to an embodiment of the present invention; -
FIG. 2 is a schematic diagram of an air spinning device of the spinning unit shown inFIG. 1 ; -
FIG. 3 is a schematic diagram of the air spinning device shown inFIG. 2 that does not include a needle; -
FIG. 4 is a schematic diagram of a tension stabilizer of the spinning unit shown inFIG. 1 ; -
FIG. 5 is a schematic diagram showing a method of fixing and detaching a fiber guide, a nozzle block, etc.; -
FIG. 6 is a schematic diagram of a structure for supplying pressurized air from an air supply source to a spinning chamber; -
FIGS. 7A and 7B are schematic diagrams showing a method of locking a spindle; -
FIG. 8 is a schematic diagram showing another method of locking the spindle; -
FIGS. 9A and 9B are schematic diagrams of a structure for locking a nozzle holder by using a stopper; -
FIG. 10 is a schematic diagram of a structure for changing a locking position of the nozzle holder by switching the stopper; -
FIG. 11 is a schematic diagram of a structure for changing the locking position of the nozzle holder by extending or retracting the stopper; and -
FIG. 12 is a schematic diagram showing a method of fixing the fiber guide and the nozzle block in a conventional air spinning device. - Exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings.
- A configuration of a spinning unit 1 according to an embodiment of the present invention is described in detail below with reference to
FIG. 1 . The spinning unit 1 is a spinning apparatus that produces a spun yarn Y from a fiber bundle (hereinafter, "sliver") F and produces a package P. The spinning unit 1 includes asliver supplying unit 4, a drafting device 5, anair spinning device 6, a yarn-defect detecting device 7, atension stabilizer 8, and awinding device 9 that are arranged in this order along a feed direction of the sliver F and the spun yarn Y. - The
sliver supplying unit 4 supplies the sliver F, from which the spun yarn Y is to be produced, to the drafting device 5. Thesliver supplying unit 4 includes asliver casing 41 and a sliver guide (not shown). The sliver F stored in thesliver casing 41 is supplied to the drafting device 5 through the sliver guide. - The drafting device 5 makes the thickness of the sliver F uniform by drafting the sliver F. The drafting device 5 includes four pairs of draft rollers, i.e., a pair of
back rollers 51, a pair ofthird rollers 52, a pair ofmiddle rollers 53, and a pair of front rollers 54 arranged in this order along the feed direction of the sliver F. - Of the four pairs of draft rollers, the
draft rollers 51 include abottom roller 51A and atop roller 51B, thedraft rollers 52 include abottom roller 52A and atop roller 52B, thedraft rollers 53 include a bottom roller 53A and atop roller 53B, and the draft rollers 54 include abottom roller 54A and atop roller 54B. Anapron band 53C is arranged around the bottom roller 53A and anotherapron band 53C is arranged around thetop roller 53B of the pair ofmiddle rollers 53. Theapron bands 53C are made of material such as leather or synthetic rubber. - The
bottom rollers top rollers bottom rollers draft rollers - In the drafting device 5 configured in this way, a feeding speed of the sliver F pinched between the pairs of
draft rollers draft rollers - The
air spinning device 6 twists the drafted sliver F, thereby producing the spun yarn Y. As shown inFIG. 2 , theair spinning device 6 includes afiber guide 61, aspindle 62, and anozzle block 63. Moreover, solid arrows shown inFIG. 2 indicate the feed direction of the sliver F and the spun yarn Y. Hollow arrows shown inFIG. 2 indicate an airflow direction of supplied air. - The
fiber guide 61 is a member that partially defines a spinning chamber SC. The sliver F drafted by the drafting device 5 passes through thefiber guide 61 to the spinning chamber SC. More specifically, the sliver F passes through afiber introducing passage 61g, which communicates with the spinning chamber SC, of thefiber guide 61 to the spinning chamber SC. Aneedle 61n serving as a guide of the sliver F by causing the sliver F to run therealong is provided in thefiber guide 61 in a manner to project into the spinning chamber SC. - The
spindle 62 is a member that partially defines the spinning chamber SC. Thespindle 62 guides the sliver F twisted in the spinning chamber SC, that is, the spun yarn Y, to the yarn-defect detecting device 7. More specifically, thespindle 62 guides the spun yarn Y through afiber passageway 62s, which communicates with the spinning chamber SC, to the yarn-defect detecting device 7. The yarn-defect detecting device 7 is arranged on a downstream side in a yarn feed direction. - The
nozzle block 63 is a member that partially defines the spinning chamber SC. Thenozzle block 63 supplies pressurized air generated by an air supply source AB, which is described later, to the spinning chamber SC. More specifically, thenozzle block 63 guides the air throughair holes 63a, which communicate with the spinning chamber SC, into the spinning chamber SC. Theair holes 63a defined in thenozzle block 63 communicate with the spinning chamber SC such that air jetted through theair holes 63a flows in the same direction around a central axis of the spinning chamber SC. As a result, a swirling airflow is generated inside the spinning chamber SC (see the hollow arrows shown inFIG. 3 ). - The spinning chamber SC is described in more detail below. The spinning chamber SC is a space surrounded by the
fiber guide 61, thespindle 62, and thenozzle block 63. More specifically, the spinning chamber SC is a space surrounded by the substantiallyconical spindle 62 that is inserted from one side relative to a substantially conical through hole 64h in thenozzle block 63 and thefiber guide 61 attached onto the other side of thenozzle block 63. - The spinning chamber SC is divided into a space SC1 provided between the
fiber guide 61 and thespindle 62 and a space SC2 provided between thespindle 62 and thenozzle block 63. In the space SC1, trailing-end portions of fibers that form the sliver F are turned over (see long dashed double-short dashed lines inFIGS. 2 and3 ) by the swirling airflow. Furthermore, in the space SC2, the turned-over trailing-end portions of the fibers of the sliver F are swung (see long dashed double-short dashed lines inFIGS. 2 and3 ) by the swirling airflow. - In the spinning chamber SC configured in this way, the trailing-end portions of the fibers of the sliver F that runs along the
needle 61n are turned over and wound around central fibers one after another. Theair spinning device 6 is capable of twisting the sliver F by utilizing a swirling airflow in this way, thereby producing the spun yarn Y. - As shown in
FIG. 3 , in an alternative structure, theair spinning device 6 is configured without theneedle 61n. In this embodiment, a downstream edge of thefiber guide 61 performs a function of theneedle 61n. Even though theair spinning device 6 is configured without theneedle 61n, the same object and effect according to the present invention are achieved. - The yarn-
defect detecting device 7 detects a defect produced in the spun yarn Y. The yarn-defect detecting device 7 includes a light source (not shown), a light-receiver (not shown), and a casing (not shown). - The light source is a semiconductor device, or, put another way, a light-emitting diode, that emits light in response to application of forward voltage thereto. The light source is arranged so as to illuminate the spun yarn Y with the light emitted from the light source.
- The light-receiver is a semiconductor device, or, put another way, a phototransistor, that can control electric current with optical signals. The light-receiver is arranged so as to receive the light emitted from the light source.
- The casing is a member that holds the light source and the light-receiver at predetermined positions. A yarn passage, through which the spun yarn Y passes, is defined in the casing. The casing holds the light source and the light-receiver such that the light source and the light-receiver face each other with the spun yarn Y therebetween.
- In the yarn-
defect detecting device 7 configured in this way, an amount of light received by the light-receiver can be calculated by subtracting light shielded by the spun yarn Y from the light emitted from the light source to illuminate the spun yarn Y. The yarn-defect detecting device 7 is capable of measuring the amount of received light according to yarn thickness and therefore can detect a defect in the spun yarn Y. - Defects that can be detected by the yarn-
defect detecting device 7 include anomalies, for example, that a portion of the spun yarn Y is too thick or too thin, and a foreign matter, such as a polypropylene foreign matter, interposed into the spun yarn Y. The yarn-defect detecting device 7 can adopt an electrical capacitance sensor in lieu of the optical sensor described above. - The
tension stabilizer 8 maintains proper tension on the spun yarn Y and stabilizes the tension. As shown inFIG. 4 , thetension stabilizer 8 includes aroller 81, apower output section 82, and an unwindingmember 83. Note that arrows shown inFIG. 6 indicate the feed direction of the spun yarn Y. - The
roller 81 is a substantially cylindrical rotary member used in pulling out the spun yarn Y from theair spinning device 6 and winding the spun yarn Y around itself. Theroller 81 is arranged on arotary shaft 82a of thepower output section 82 and rotated by thepower output section 82. The spun yarn Y pulled out from theair spinning device 6 is wound around an outer peripheral surface of theroller 81. - As the
power output section 82, an electric motor that is driven on electric power supplied thereto is used. Thepower output section 82 rotates theroller 81 while maintaining the rotation speed of theroller 81 at a predetermined value. This makes it possible to wind the spun yarn Y around theroller 81 at a constant winding speed. - The unwinding
member 83 is a threading member that rotates in combination with or separately from theroller 81 to thereby assist unwinding of the spun yarn Y. The unwindingmember 83 is provided on its one end to arotary shaft 84 of theroller 81. A portion on the other end of the unwindingmember 83 is curved toward the outer peripheral surface of theroller 81. By hooking the spun yarn Y on the curved portion, the unwindingmember 83 unwinds the spun yarn Y from theroller 81. Meanwhile, a permanent magnet (not shown) that exerts a resisting force against rotation of the unwindingmember 83 is provided at a basal portion of therotary shaft 84, to which the unwindingmember 83 is attached. - The unwinding
member 83 configured in this way rotates in combination with theroller 81 when a tension placed on the spun yarn Y is relatively weak and overcome by the resisting force. In contrast, the unwindingmember 83 rotates separately from theroller 81 when the tension placed on the spun yarn Y is relatively strong to overcome the resisting force. Thetension stabilizer 8 can cause the unwindingmember 83 to rotate in combination with or separately from theroller 81 depending on the tension placed on the spun yarn Y, thereby adjusting an unwinding speed of the spun yarn Y. Thetension stabilizer 8 maintains a proper tension on the spun yarn Y and stabilizes the tension in this way. - As described above, the
tension stabilizer 8 is operative to pull out the spun yarn Y from theair spinning device 6. In an alternative structure, the spun yarn Y is pulled out by a delivery roller and a nip roller by arranging them, for example, on a downstream side of theair spinning device 6. In an alternative structure, thetension stabilizer 8 is arranged on the downstream side of the delivery roller and the nip roller to wind and store the spun yarn Y. In an alternative structure, thetension stabilizer 8 is not provided and the spun yarn Y is pulled out by the windingdevice 9. - The winding
device 9 winds the spun yarn Y to thereby form a substantially cylindrical (cheese-shaped) package P. The windingdevice 9 includes a drivingroller 91 and a cradle (not shown). The cradle rotatably supports abobbin 92. - The driving
roller 91 is a rotary member that rotates to cause thebobbin 92 and the package P to be rotated by rotation of the drivingroller 91. The drivingroller 91 adjusts its rotation speed according to change in the outer diameter of the package P, thereby maintaining the circumferential velocity of the package P constant. This makes it possible to wind the spun yarn Y on thebobbin 92 at a constant winding speed. - The
bobbin 92 is a substantially cylindrical rotary member around which the spun yarn Y is wound. Thebobbin 92 is rotated by the rotation of the drivingroller 91 that rotates in contact with the outer peripheral surface of any one of thebobbin 92 and the package P. In the windingdevice 9, a traversing device (not shown) causes the spun yarn Y to be traversed to prevent unbalanced winding of the spun yarn Y on the package P. - In the winding
device 9 configured in this way, the spun yarn Y introduced to thebobbin 92 is wound, without being unbalanced, on the outer peripheral surface of thebobbin 92. The windingdevice 9 can form the substantially cylindrical (cheese-shaped) package P in this way. The package P to be formed by the windingdevice 9 is not limited to the substantially cylindrical (cheese-shaped) package P shown inFIG. 1 . The windingdevice 9 can also form the package P having a substantially conical shape. - How a
fiber guide 161 and anozzle block 163 are fixed in a conventionalair spinning device 106 is explained below with reference toFIG. 12. FIG. 12 is a side view of the conventionalair spinning device 106. - The
nozzle block 163 is supported by anozzle holder 164 in a state in which thenozzle block 163 is engaged into a throughhole 164h of thenozzle holder 164 and a throughhole 165h of aspacer 165. More specifically, thenozzle block 163 is engaged into the throughhole 164h of thenozzle holder 164 and the throughhole 165h of thespacer 165, and supported by thenozzle holder 164 in a state in which alocking surface 163p of thenozzle block 163 abuts against thespacer 165. - The
fiber guide 161 is fitted with an upper end surface (an upstream side end surface in a fiber-bundle running direction) of thenozzle block 163. More specifically, thefiber guide 161 is supported with a lower end portion (a downstream end surface in the fiber-bundle running direction) thereof fitted with a recess provided on the upper end surface of thenozzle block 163. - The
fiber guide 161 and thenozzle block 163 that are fitted with each other are immovably fixed to thenozzle holder 164 via thespacer 165 by anozzle cap 166. More specifically, thefiber guide 161 and thenozzle block 163 are immovably fixed to thespacer 165 and thenozzle holder 164 by thenozzle cap 166 with pawls thereof grasping thefiber guide 161. - Thus, in the conventional
air spinning device 106, thefiber guide 161 and thenozzle block 163 are fixed onto thespacer 165 first, and then thespacer 165 is fixed to thenozzle holder 164. This is because in the spinning unit 1, theair spinning device 106 and the pair of front rollers 54 are very close to each other so that it is difficult for an operator to directly fix thefiber guide 161 and thenozzle block 163 to thenozzle holder 164. Furthermore, as disclosed in Japanese unexamined utility model application publication No.H4-131661 air spinning devices 106 and it is necessary to use thespacer 165 for attaching thefiber guide 161 and thenozzle block 163 to theair spinning device 106. - Problems encountered in the conventional method of fixing the
fiber guide 161 and thenozzle block 163 are explained below. - In the conventional
air spinning device 106 in which thespacer 165 is provided between the lockingsurface 163p of thenozzle block 163 and thenozzle holder 164, it is possible to change the attachment positions of thefiber guide 161 and thenozzle block 163 by replacing thespacer 165 with an appropriate spacer. However, if a tolerance of thespacer 165 is added to tolerances of thefiber guide 161, thenozzle block 163, and thenozzle cap 166, a precision of the attachment positions of thefiber guide 161 and thenozzle block 163 is likely to reduce. - If a distance D between the
fiber guide 161 and aspindle 162 is shorter than a predetermined value, trailing-end portions of the synthetic fibers forming the sliver F are hard to be turned over. As a result, the spun yarn Y that is loosely twisted is produced. More specifically, if the distance D between thefiber guide 161 and thespindle 162 is short, only a small number of the trailing-end portions of the synthetic fibers forming the sliver F are moved by and along the swirling airflow. This makes it difficult to turn over a sufficient number of the trailing-end portions. Accordingly, the number of the synthetic fibers forming the sliver F that are swung and sufficiently wound around the central fibers is reduced. As a result, a loosely twisted spun yarn (loose yarn) Y is produced. - If the distance D between the
fiber guide 161 and thespindle 162 is equal to the predetermined value, trailing-end portions of the fibers forming the sliver F can be easily turned over. Consequently, the spun yarn Y that is firmly twisted is produced. More specifically, if the distance D between thefiber guide 161 and thespindle 162 is equal to the predetermined value, the trailing-end portions of the fibers forming the sliver F are moved by and along the swirling airflow easily, and therefore the trailing-end portions of the fibers are easily turned over. Accordingly, the fibers that are moved by and along the swirling airflow can be sufficiently wound around central fibers. Consequently, a firmly-twisted spun yarn (firm yarn) Y is produced. - However, if the distance D between the
fiber guide 161 and thespindle 162 is too long, both ends of the synthetic fibers forming the sliver F are swung in the spinning chamber SC without being restricted by either of thefiber guide 161 and thespindle 162. Accordingly, the synthetic fibers are discharged to the outside of theair spinning device 106 more frequently. As a result, fiber loss increases, which is disadvantageous. Furthermore, as the distance D increases, the volumetric capacity of the spinning chamber SC increases, and hence the amount of air that needs to be used in producing the swirling airflow also increases. Accordingly, the need for increasing the size of the air supply source arises. This requires upsizing of the spinning unit, which is also disadvantageous. - As described above, the spun yarn Y produced by the
air spinning device 106 is likely to be influenced by the shape of the spinning chamber SC because theair spinning device 106 causes the fibers to swing by utilizing the swirling airflow. If the shape of the spinning chamber SC changes due to shifting of the attachment positions of thefiber guide 161, thenozzle block 163, etc., that define the spinning chamber SC, the twisting firmness of the produced spun yarn Y is likely to vary. Furthermore, the fiber loss is also likely to increase. Therefore, there is a need of an air spinning device in which variations in the shape of the spinning chamber SC can be reduced by improving the precision of the attachment positions of the fiber guide and the nozzle block. - How the
fiber guide 61 and thenozzle block 63 are fixed in theair spinning device 6 according to an embodiment of the present invention is explained below with reference toFIG. 5. FIG. 5 is a side view of theair spinning device 6 according to the embodiment of the present invention. - The
nozzle block 63 is supported in a state in which thenozzle block 63 is engaged into the through hole 64h of anozzle holder 64. More specifically, thenozzle block 63 is engaged into the through hole 64h of thenozzle holder 64, and supported in a state in which alocking surface 63p of thenozzle block 63 abuts against thenozzle holder 64. - The
fiber guide 61 is fitted with an upper end surface (an upstream side end surface in the fiber-bundle running direction) of thenozzle block 63. More specifically, thefiber guide 61 is supported with a lower end portion (a downstream side end surface in the fiber-bundle running direction) thereof fitted with the recess provided on the upper end surface of thenozzle block 63. - The
fiber guide 61 and thenozzle block 63 are fitted with each other and fixed to thenozzle holder 64 by anozzle cap 66. More specifically, thefiber guide 61 and thenozzle block 63 are directly fixed to thenozzle holder 64 by thenozzle cap 66 with pawls thereof grasping thefiber guide 61. - This structure enables improvement in a precision of an attachment position of the
nozzle block 63; because, thenozzle block 63 is fixed by thenozzle cap 66 with the lockingsurface 63p of thenozzle block 63 abutting against thenozzle holder 64 and thenozzle cap 66 directly abutting against thenozzle holder 64. A precision of an attachment position of thefiber guide 61 that is fixed in a state of being fitted into thenozzle block 63 also improves. Thus, the quality of the spun yarn Y can be improved by reducing the variations in the shape of the spinning chamber SC. Furthermore, because thefiber guide 61 and thenozzle block 63 can be fixed with a simple structure, cost reduction can also be realized. - In the structure disclosed in Japanese unexamined utility model application publication No.
H4-131661 air spinning devices 106, there are restrictions due to the positioning plate. That is, it is difficult to position theair spinning device 106 relative to a drafting device freely for each spinning unit. However, according to the configuration of the present embodiment, by immovably fixing thefiber guide 61 and thenozzle block 63 to thenozzle holder 64, theair spinning device 6 can be positioned relative to the drafting device 5 freely for each spinning unit 1. - As explained above, the
air spinning device 6 causes the fibers to swing by utilizing the swirling airflow, and therefore, the spun yarn Y produced by theair spinning device 6 is likely to be influenced by the fiber characteristics. Accordingly, the twisting firmness of the produced spun yarn Y may vary according to the fiber characteristics, such as, an average fiber length. Therefore, there is a need for an air spinning device that allows the fiber guide and the nozzle block to be easily replaced, and enables spinning according to the fiber characteristics. - A structure that enables easy replacement of the
fiber guide 61 and thenozzle block 63 is explained below with reference toFIG. 5 . - The
nozzle holder 64 of theair spinning device 6 includes a firstnozzle holder member 64A and a secondnozzle holder member 64B. A solid arrow shown inFIG. 5 indicates directions of attachment and detachment of the firstnozzle holder member 64A. - The
fiber guide 61 and thenozzle block 63 are immovably fixed to the firstnozzle holder member 64A by thenozzle cap 66. Thespindle 62 inserted into the through hole 64h of thenozzle block 63 is locked by abutment of aspindle cap 68 that is described later against the firstnozzle holder member 64A. The secondnozzle holder member 64B is rotatably coupled to a shaft SH (supporting member) of the spinning unit 1. - The first
nozzle holder member 64A is detachably attached to one end of the secondnozzle holder member 64B. More specifically, the firstnozzle holder member 64A can be attached to or detached from the secondnozzle holder member 64B by tightening or removing two bolts BT (seeFIG. 6 ). - With this structure, the first
nozzle holder member 64A to which thefiber guide 61 and thenozzle block 63 are immovably fixed is rendered detachable. Therefore, thefiber guide 61 and thenozzle block 63 can be easily replaced. Consequently, theair spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved. - A structure for supplying the pressurized air generated by the air supply source AB to the spinning chamber SC is explained below with reference to
FIG. 6. FIG. 6 is a top view of theair spinning device 6 according to the embodiment of the present invention. - An air-guiding
passage 64p that guides the air pressure-fed from the air supply source AB to the spinning chamber SC includes a first air-guiding passage 64Ap provided in the firstnozzle holder member 64A and a second air-guiding passage 64Bp provided in the secondnozzle holder member 64B. Hollow arrows shown inFIG. 6 indicate a direction of flow of air and a solid arrow shown inFIG. 6 indicates the directions of attachment and detachment of the firstnozzle holder member 64A. - The first air-guiding passage 64Ap communicates with an air chamber AC (see
FIG. 5 ) via a coupling member 64Ac attached to one end of the firstnozzle holder member 64A. The air guided to the air chamber AC is supplied to the spinning chamber SC through theair holes 63a of thenozzle block 63. The second air-guiding passage 64Bp communicates with a boss hole member 64Bh provided at one end of the secondnozzle holder member 64B via a coupling member 64Bc attached to a side edge of the secondnozzle holder member 64B. - When the first
nozzle holder member 64A is attached to the secondnozzle holder member 64B, the first air-guiding passage 64Ap communicates with the second air-guiding passage 64Bp. More specifically, when the firstnozzle holder member 64A is attached to the secondnozzle holder member 64B, the coupling member 64Ac of the firstnozzle holder member 64A is inserted into the boss hole member 64Bh of the secondnozzle holder member 64B; therefore, the first air-guiding passage 64Ap communicates with the second air-guiding passage 64Bp. - In this structure, the first
nozzle holder member 64A can be detached without having to remove a pipe AH that extends from the air supply source AB. Therefore, thefiber guide 61 and thenozzle block 63 can be easily replaced. Consequently, theair spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved. Because the pipe AH extending from the air supply source AB does not need to be removed, mixing of contaminants into the air-guidingpassage 64p (64Ap and 64Bp) can be prevented and the quality of the spun yarn Y can be improved. - A method of locking the
spindle 62 is explained below with reference toFIGS. 7A and 7B. FIG. 7A is a magnified side view of thespindle 62 of theair spinning device 6 according to the embodiment of the present invention.FIG. 7B is a cross-sectional view of thespindle 62 taken along a line X-X shown inFIG. 7A . - The
spindle 62 is supported by aspindle holder 67 with a projection thereof engaged into thespindle 62. More specifically, thespindle 62 is supported by thespindle holder 67 such that the projection provided on an upper end surface (the upstream end surface in the fiber-bundle running direction) of thespindle holder 67 is engaged into a lower end (the downstream end surface in the fiber-bundle running direction) of thespindle 62. - The
spindle 62 is locked in thespindle holder 67 by thespindle cap 68 that functions as a spindle locking member. More specifically, thespindle 62 is locked in thespindle holder 67 by thespindle cap 68 with pawls thereof grasping a lockingsurface 62p of thespindle 62. In the present embodiment, a female screw part is provided in thespindle cap 68 and thespindle cap 68 is threaded onto a male screw part of thespindle holder 67. - With this structure, because the
spindle 62 can be locked in thespindle holder 67 with just one touch merely by threading in thespindle cap 68, thespindle 62 can be easily replaced. Consequently, theair spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved. Thespindle 62 can be locked in thespindle holder 67 with a simple structure; therefore, cost reduction can be realized. - In the method of locking the
spindle 62 of theair spinning device 6, aprojection 67u provided on thespindle holder 67 meshes with arecess 68u provided in thespindle cap 68 when thespindle cap 68 is threaded onto thespindle holder 67. In an alternative structure, theprojection 67u is provided on thespindle cap 68 instead of on thespindle holder 67 and therecess 68u is provided in thespindle holder 67 instead of in thespindle cap 68. - With this structure, if the
spindle cap 68 is threaded until theprojection 67u meshes with therecess 68u, a tightening torque reaches a predetermined value. Therefore, thespindle 62 can be easily locked and easily replaced. Consequently, theair spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved. - The
spindle cap 68 is made of resin; therefore, thespindle cap 68 deforms while being threaded in and theprojection 67u meshes with therecess 68u. Therefore, thespindle 62 can be locked in thespindle holder 67 with just one touch without having to use a tool. Consequently, a time required for the operator to replace thespindle 62 is reduced and an operation efficiency of the spinning unit 1 is improved. - In the conventional
air spinning device 106, for example, as disclosed in Japanese Patent Application Laid-open No.H7-126924 spindle 162 is locked to a spindle holder 167 using bolts. The conventionalair spinning device 106 is arranged very close to the drafting device, and there is a lack of adequate working space for carrying out replacement of thespindle 162. Thus, it is difficult to perform operations using tools, and locking thespindle 162 in the spindle holder 167 with the bolts. However, in a method in which thespindle 62 is locked in thespindle holder 67 with just one touch by threading in thespindle cap 68 as in the present embodiment, no operations necessitate a use of a tool. Therefore, thespindle 62 can be locked even if there is a narrow working space. - In the method of locking the
spindle 162 using the bolts in the conventionalair spinning device 106, the operator my drop the bolts by mistake. However, in the method in which thespindle 62 is locked in thespindle holder 67 by threading in thespindle cap 68 as in the present embodiment, the number of components required for locking thespindle 62 in thespindle holder 67 is less, and as a result, thespindle 62 can be easily locked. - As shown in
FIG. 8 , in an alternative structure, thespindle 62 is locked using a hook member Ho without using thespindle cap 68. The hook member Ho that is a spindle locking member enables thespindle 62 to be easily locked, and easily replaced. Thus, theair spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved. Because thespindle 62 can be locked with a simple structure, cost reduction can also be realized. - A structure for locking the
nozzle holder 64 by astopper 64s is explained below with reference toFIGS. 9A and 9B. FIG. 9A is a side view of theair spinning device 6 according to the embodiment of the present invention andFIG. 9B is a front view of theair spinning device 6 from a direction of an arrow Y shown inFIG. 9A . - As shown in
FIG. 9A , the secondnozzle holder member 64B of thenozzle holder 64 is rotatably coupled to the shaft SH (supporting member) of the spinning unit 1. The shaft SH supports thenozzle holder 64 so as to be movable towards or away from the wall surface W that is arranged facing thenozzle holder 64. - An urging member SP that urges the
nozzle holder 64 towards the wall surface W is attached to the secondnozzle holder member 64B of thenozzle holder 64. An urging force acts on thenozzle holder 64 such that thenozzle holder 64 moves towards the wall surface W that is arranged facing thenozzle holder 64. A solid arrow shown inFIG. 9A indicates a direction of the urging force that acts on thenozzle holder 64. - As shown in
FIG. 9B , thestopper 64s is provided on the firstnozzle holder member 64A of thenozzle holder 64. Thestopper 64s is provided so as to be protruding towards the wall surface W direction from an upper surface of the firstnozzle holder member 64A. Thus, thestopper 64s abuts against the wall surface W, thereby locking thenozzle holder 64. - With this structure, because the
nozzle holder 64 on which the urging force acts is locked by thestopper 64s, a play of thenozzle holder 64 is suppressed and a precision of a positioning of thenozzle holder 64 improves. A precision of positions of thefiber guide 61 and thenozzle block 63 immovably fixed to thenozzle holder 64 relative to thespindle 62 also improves. Consequently, variations in the shape of the spinning chamber SC can be reduced and the quality of the spun yarn Y can be improved. - As shown in
FIG. 10 , a dial 64D that includes a plurality of thestoppers 64s having different shapes in a peripheral direction may be provided on thenozzle holder 64 and thestopper 64s that abuts against the wall surface W can be switched. More specifically, thestoppers 64s having different shapes are formed such that a protrusion length of each of thestoppers 64s from a surface of thenozzle holder 64 is different. When spinning the sliver F having a longer fiber length, the dial 64D is switched such that thenozzle holder 64 is locked by thestopper 64s having a long protrusion length. When spinning the sliver F having a shorter fiber length, the dial 64D is switched such that thenozzle holder 64 is locked by thestopper 64s having a short protrusion length. - Because the
nozzle holder 64 includes thestoppers 64s of different shapes, the locking position of thenozzle holder 64 can be changed by switching to any of thestoppers 64s. Consequently, theair spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved. - As shown in
FIG. 11 , a structure can be provided in which the locking position of thenozzle holder 64 can be changed by extending or retracting thestopper 64s (see an arrow inFIG. 11 ). Consequently, theair spinning device 6 can perform spinning according to the fiber characteristics and the quality of the spun yarn Y can be improved. - In the spinning apparatus that includes the
air spinning device 6 described above, the package P can be produced with high quality spun yarn Y and cost reduction can be realized. - In the spinning apparatus that includes a plurality of the spinning units 1, the spun yarn Y produced in each spinning unit 1 is required to be of the same quality. Thus, by producing the spun yarn Y by using the
air spinning device 6 according to the present embodiment, variation in the quality of the spun yarn Y among the spinning units 1 can be reduced. - In the spinning unit 1 according to the present embodiment, the sliver F is fed from an upward direction to a downward direction. However, the present invention is not to be thus limited. For example, cans in which the sliver F is stored can be arranged in a lower portion of a machine base and the winding
device 9 can be arranged in an upper portion of the machine base. - An air spinning device according to a first aspect of the present invention includes a fiber guide, a nozzle block, a spindle, a nozzle holder, and a nozzle cap. The nozzle holder holds the nozzle block while being in a state of abutment against the nozzle block. The nozzle cap fixes the fiber guide and the nozzle block to the nozzle holder, and is attached to the nozzle holder while being in a state of direct abutment against the nozzle holder.
- In an air spinning device according to a second aspect of the present invention, the nozzle holder includes a first nozzle holder member and a second nozzle holder member. The first nozzle holder member holds the nozzle block and has the nozzle cap attached thereon. The second nozzle holder member supports the first nozzle holder member. The first nozzle holder member is detachably attached to the second nozzle holder member.
- In an air spinning device according to a third aspect of the present invention, the first nozzle holder member includes a first air-guiding passage that guides the air into the spinning chamber. The second nozzle holder member includes a second air-guiding passage that guides the air that is pressure-fed from an air supply source. The first air-guiding passage and the second air-guiding passage communicate with each other when the first nozzle holder member is attached to the second nozzle holder member.
- An air spinning device according to a fourth aspect of the present invention includes a fiber guide, a nozzle block, a spindle, a spindle holder, and a spindle locking member. The spindle holder holds the spindle. The spindle locking member locks the spindle into the spindle holder with just one touch.
- In an air spinning device according to a fifth aspect of the present invention, the spindle locking member is threaded with respect to the spindle holder while being in a state of abutment against the spindle.
- In an air spinning device according to a sixth aspect of the present invention, the spindle holder has a recess or a projection. The spindle locking member has a projection or a recess. The spindle holder is held in the spindle locking member by a meshing of the recess/projection of the spindle holder with the projection/recess of the spindle locking member.
- In an air spinning device according to a seventh aspect of the present invention, the air spinning device includes a supporting member, a stopper, and an urging member. The supporting member supports the nozzle holder so as to enable the nozzle holder to move towards or away from a wall surface facing the nozzle holder. The stopper that positions the nozzle holder by abutting against the wall surface is provided on the nozzle holder. The urging member urges the nozzle holder towards the wall surface.
- In an air spinning device according to an eighth aspect of the present invention, a plurality of the stoppers of different shapes is provided on the nozzle holder, and a switching structure is provided that enable switching of the stopper that abuts against the wall surface.
- A spinning apparatus according to a ninth aspect of the present invention includes an air spinning device according to any one of the first to the eight aspects of the present invention, and a winding device that winds a spun yarn spun by the air spinning device into a package.
- According to the first aspect of the present invention, a nozzle cap, which is attached to a nozzle holder while being in a state of direct abutment against the nozzle holder, fixes a nozzle block while the nozzle block is in a state of abutment against the nozzle holder. Therefore, there is improved precision of an attachment position of the nozzle block. Consequently, a precision of an attachment position of a fiber guide, which is also fixed in a state of being fitted into the nozzle block, also improves. Thus, variations in a shape of a spinning chamber can be reduced and a quality of spun yarns can be improved. Furthermore, the fiber guide and the nozzle block are fixed to the nozzle holder with a simple structure. Consequently, cost reduction is realized.
- According to the second aspect of the present invention, a first nozzle holder member, to which the fiber guide and the nozzle block are fitted, is detachable, enabling the fiber guide and the nozzle block to be easily replaced. Therefore, spinning can be performed according to fiber characteristics, and thereby the quality of the spun yarns can be improved.
- According to the third aspect of the present invention, the first nozzle holder member can be detached without having to remove a pipe extending from an air supply source. Consequently, the fiber guide and the nozzle block can be easily replaced. Therefore, spinning can be performed according to the fiber characteristics, and thereby the quality of the spun yarns can be improved. Furthermore, because the pipe extending from the air supply source needs not be removed, contaminants can be prevented from entering an air guiding passage, and therefore, the quality of the spun yarns can be improved.
- According to the fourth aspect of the present invention, a spindle is locked in a spindle holder with a simple structure. Consequently, cost reduction is realized.
- According to the fifth aspect of the present invention, because the spindle can be locked in the spindle holder merely by threading a spindle locking member, the spindle can be easily replaced. Therefore, spinning can be performed according to the fiber characteristics, and thereby the quality of the spun yarns can be improved.
- According to the sixth aspect of the present invention, a predetermined clamping torque is reached by threading in the spindle locking member until a projection and a recess mesh. Consequently, the spindle can be easily locked and easily replaced. Therefore, spinning can be performed according to the fiber characteristics, and thereby the quality of the spun yarns can be improved.
- According to the seventh aspect of the present invention, because the nozzle holder, which is subjected to an urging force, is locked with a stopper, a play of the nozzle holder can be suppressed and a precision of a positioning of the nozzle holder is improved. Consequently, a precision of positions of the fiber guide and the nozzle block, which are fixed to the nozzle holder, relative to the spindle also improves. Therefore, variations in the shape of the spinning chamber can be reduced and the quality of the spun yarns can be improved.
- According to the eighth aspect of the present invention, because a plurality of the stoppers of different shapes are provided, a locking position of the nozzle holder can be changed by switching to any of the stoppers. Thus, spinning can be performed according to the fiber characteristics, and thereby the quality of the spun yarns can be improved.
- According to the ninth aspect of the present invention, packages of high quality spun yarns are produced, and cost reduction is realized.
- Although the invention has been described with respect to specific embodiments for a complete and clear disclosure, the appended claims are not to be thus limited but are to be construed as embodying all modifications and alternative constructions that may occur to one skilled in the art that fairly fall within the basic teaching herein set forth.
Claims (9)
- An air spinning device comprising:a fiber guide (61) that has a fiber introducing passage (61g) that communicates with a spinning chamber (SC), the fiber guide (61) being adapted to guide a fiber bundle (F) into the spinning chamber (SC);a nozzle block (63) that has an air hole (63a) that communicates with the spinning chamber (SC), the nozzle block (63) being adapted to guide air into the spinning chamber (SC);a spindle (62) that has a fiber passageway (62s) that communicates with the spinning chamber (SC), the spindle (62) being adapted to guide the fiber bundle (F) twisted in the spinning chamber (SC);a nozzle holder (64) that is adapted to hold the nozzle block (63) while being in a state of abutment against the nozzle block (63); anda nozzle cap (66) that is adapted to fix the fiber guide (61) and the nozzle block (63) to the nozzle holder (64), the nozzle cap (66) being adapted to be attached to the nozzle holder (64) while being in a state of direct abutment against the nozzle holder (64).
- The air spinning device according to Claim 1, wherein the nozzle holder (64) includes
a first nozzle holder member (64A) that is adapted to hold the nozzle block (63) and to which the nozzle cap (66) is attachable, and
a second nozzle holder member (64B) that is adapted to support the first nozzle holder member (64A),
the first nozzle holder member (64A) being detachably attachable to the second nozzle holder member (64B). - The air spinning device according to Claim 2, wherein
the first nozzle holder member (64A) includes a first air-guiding passage (64Ap) that is adapted to guide the air into the spinning chamber (SC),
the second nozzle holder member (64B) includes a second air-guiding passage (64Bp) that is adapted to guide the air that is pressure-fed from an air supply source (AB), and
the first air-guiding passage (64Ap) and the second air-guiding passage (64Bp) communicate with each other when the first nozzle holder member (64A) is attached to the second nozzle holder member (64B). - The air spinning device according any one of Claims 1 to 3, further comprising:a spindle holder (67) that is adapted to hold the spindle (62); anda spindle locking member (68) that is adapted to lock the spindle (62) into the spindle holder (67) without a tool.
- The air spinning device according to Claim 4, wherein the spindle locking member (68) is threaded with respect to the spindle holder (67) while being in a state of abutment against the spindle (62).
- The air spinning device according to Claim 5, wherein
the spindle holder (67) has any one of a recess and a projection,
the spindle locking member (68) has a projection when the spindle holder (67) has the recess and has a recess when the spindle holder (67) has a projection, and
the spindle (62) is coupled to the spindle holder (67) by a meshing of the recess/projection of the spindle holder (67) with the projection/recess of the spindle locking member (68). - The air spinning device according to any one of Claims 1 to 6, further comprising:a supporting member (SH) that is adapted to support the nozzle holder (64) so as to enable the nozzle holder (64) to move towards or away from a wall surface (W) facing the nozzle holder (64);a stopper (64s) that is provided on the nozzle holder (64) and that is adapted to position the nozzle holder (64) by abutting against the wall surface (W); andan urging member (SP) that is adapted to urge the nozzle holder (64) towards the wall surface (W).
- The air spinning device according to Claim 7, further comprising:a plurality of the stoppers (64s) of different shapes that is provided on the nozzle holder (64); anda switching structure that is adapted to enable switching of the stopper (64s) that abuts against the wall surface (W).
- A spinning apparatus comprising:an air spinning device (6) according to any one of Claims 1 to 8; anda winding device (9) that is adapted to wind a spun yarn (Y) spun by the air spinning device (6) into a package (P).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2010277270A JP2012127009A (en) | 2010-12-13 | 2010-12-13 | Air spinning device and spinning machine provided with air spinning device |
Publications (3)
Publication Number | Publication Date |
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EP2463414A2 true EP2463414A2 (en) | 2012-06-13 |
EP2463414A3 EP2463414A3 (en) | 2015-04-22 |
EP2463414B1 EP2463414B1 (en) | 2017-09-20 |
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Family Applications (1)
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EP11192763.8A Active EP2463414B1 (en) | 2010-12-13 | 2011-12-09 | Air spinning device and spinning apparatus including the same |
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EP (1) | EP2463414B1 (en) |
JP (1) | JP2012127009A (en) |
CN (3) | CN105220279A (en) |
Cited By (3)
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CN103014944A (en) * | 2013-01-11 | 2013-04-03 | 武汉纺织大学 | Splitting twisting-boosting type vortex spinner |
CH709607A1 (en) * | 2014-05-08 | 2015-11-13 | Rieter Ag Maschf | Method for operating a textile machine for the production of roving, as well as textile machine at the moment. |
CN105239224A (en) * | 2011-06-20 | 2016-01-13 | 村田机械株式会社 | Hollow guide shaft unit |
Families Citing this family (2)
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JP2012127009A (en) * | 2010-12-13 | 2012-07-05 | Murata Mach Ltd | Air spinning device and spinning machine provided with air spinning device |
CN117248309B (en) * | 2023-11-16 | 2024-03-08 | 广东荣昌纺织实业有限公司 | Low-doffing threading jet vortex spinning device and application thereof in preparation of core spun yarn |
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DE102005018296A1 (en) * | 2005-04-15 | 2006-10-19 | Wilhelm Stahlecker Gmbh | Washer for textile spinning machine open-ended spinning rotor with magnetic washer forming labyrinth seal |
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DE102006019224B4 (en) * | 2006-04-26 | 2014-02-20 | Rieter Ingolstadt Gmbh | Open-end spinning device |
DE102007039868B4 (en) * | 2007-08-23 | 2020-11-05 | Rieter Ingolstadt Gmbh | Open-end spinning device with hinged cover element and stop component for it |
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2011
- 2011-12-09 EP EP11192763.8A patent/EP2463414B1/en active Active
- 2011-12-09 CN CN201510603031.0A patent/CN105220279A/en active Pending
- 2011-12-09 CN CN2011205135134U patent/CN202499945U/en not_active Expired - Fee Related
- 2011-12-09 CN CN201110410179.4A patent/CN102534880B/en active Active
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Publication number | Priority date | Publication date | Assignee | Title |
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CN105239224A (en) * | 2011-06-20 | 2016-01-13 | 村田机械株式会社 | Hollow guide shaft unit |
CN105239224B (en) * | 2011-06-20 | 2018-05-15 | 村田机械株式会社 | Hollow guiding axis body unit |
CN103014944A (en) * | 2013-01-11 | 2013-04-03 | 武汉纺织大学 | Splitting twisting-boosting type vortex spinner |
CN103014944B (en) * | 2013-01-11 | 2015-04-29 | 武汉纺织大学 | Splitting twisting-boosting type vortex spinner |
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Also Published As
Publication number | Publication date |
---|---|
CN102534880A (en) | 2012-07-04 |
EP2463414A3 (en) | 2015-04-22 |
CN202499945U (en) | 2012-10-24 |
JP2012127009A (en) | 2012-07-05 |
CN102534880B (en) | 2016-03-02 |
CN105220279A (en) | 2016-01-06 |
EP2463414B1 (en) | 2017-09-20 |
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