EP2993150B1 - Core yarn supplying unit, core yarn supplying device, spinning machine, and core yarn supplying method - Google Patents
Core yarn supplying unit, core yarn supplying device, spinning machine, and core yarn supplying method Download PDFInfo
- Publication number
- EP2993150B1 EP2993150B1 EP15162349.3A EP15162349A EP2993150B1 EP 2993150 B1 EP2993150 B1 EP 2993150B1 EP 15162349 A EP15162349 A EP 15162349A EP 2993150 B1 EP2993150 B1 EP 2993150B1
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- EP
- European Patent Office
- Prior art keywords
- core yarn
- yarn
- core
- tension
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
- B65H59/20—Co-operating surfaces mounted for relative movement
- B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
- B65H59/32—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/11—Spinning by false-twisting
- D01H1/115—Spinning by false-twisting using pneumatic means
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/36—Cored or coated yarns or threads
- D02G3/367—Cored or coated yarns or threads using a drawing frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- the present invention relates to a core yarn supplying unit, a core yarn supplying device, a spinning machine, and a core yarn supplying method.
- a core yarn supplying unit including a core yarn feeding section adapted to feed out a yarn end of a core yarn to a draft device, a tension applying section adapted to apply a tension to the core yarn to be supplied to the draft device, and a slack applying section adapted to apply slack to the core yarn between the core yarn feeding section and the tension applying section (see e.g., Japanese Unexamined Patent Publication No. 2012-131591 )
- the core yarn supplying unit described above is demanded to reliably feed out the yarn end of the core yarn to a main body unit configured by the draft device and the like at the start of spinning, for example.
- a core yarn supplying unit of the present invention includes a core yarn feeding section arranged to feed out a yarn end of a core yarn; a tension applying section adapted to apply a tension to the core yarn; and a slack applying section adapted to apply slack to the core yarn between the core yarn feeding section and the tension applying section, wherein the tension applying section includes: a tension applying mechanism adapted to apply the tension to the core yarn, and an operating mechanism adapted to change the tension applying mechanism to a tension applying state and a tension non-applying state.
- the tension to be applied to the core yarn can be changed by changing the tension applying mechanism to the tension applying state and the tension non-applying state.
- the tension to be applied to the core yarn by the tension applying section can be reduced while applying the slack to the core yarn by the slack applying section, the yarn end of the core yarn can be reliably fed out by the core yarn feeding section.
- the tension applying mechanism may be provided under the tension non-applying state when the core yarn feeding section feeds out the yarn end of the core yarn to the main body unit. According to such a configuration, since the tension applied to the core yarn is small when the yarn end of the core yarn is fed out, the yarn end of the core yarn can be reliably fed out.
- the slack applying section may include a hole through which the core yarn is inserted, the hole having a closed edge. According to such a configuration, the core yarn does not fall out from the hole, and thus the slack is reliably applied to the core yarn. The yarn end of the core yarn thus can be reliably fed out.
- the edge may be circular. According to such a configuration, since the core yarn can be smoothly guided by the hole of the slack applying section, the yarn end of the core yarn can be reliably fed out.
- a core yarn supplying device includes the core yarn supplying unit described above; and a core yarn package holding section adapted to hold a core yarn package.
- the yarn end of the core yarn unwound from the core yarn package can be reliably fed out.
- the core yarn supplying device of the present invention further includes a tubular core yarn guiding section adapted to guide the core yarn fed out from the core yarn supplying unit, wherein a travelling region of the core yarn is formed inside the core yarn guiding section so as to include a straight line. According to such a configuration, since the yarn end of the core yarn can smoothly travel inside the core yarn guiding section, the yarn end of the core yarn can be reliably fed out.
- a spinning machine includes the core yarn supplying unit described above; a draft device adapted to draft a fiber bundle; a pneumatic spinning device adapted to produce a spun yarn by applying twists to the fiber bundle with the core yarn as a core; and a winding device adapted to wind the spun yarn into a package, wherein the tension applying mechanism is provided under the tension non-applying state when supplying of the core yarn to the pneumatic spinning device is started.
- the yarn end of the core yarn can be reliably fed out from the core yarn supplying unit.
- a core yarn supplying method is a core yarn supplying method for supplying a core yarn from a core yarn package while applying a tension to the unwound core yarn, the method including the steps of: applying a first tension to the core yarn when supplying the core yarn; and applying a second tension smaller than the first tension to the core yarn when feeding out a yarn end of the core yarn.
- the yarn end of the core yarn can be reliably fed out.
- the core yarn supplying method may comprise the step of operating tension applying means for applying the second tension to the core yarn during the feeding out of the yarn end of the core yarn and the step of operating said tension applying means for applying the first tension to the core yarn during the subsequent supplying of the core yarn.
- the method may comprise the step of operating clamp means for clamping the yarn end and the step of operating slack applying means for pulling out a core yarn section of the core yarn from the core yarn package.
- the method may further comprise the step of operating the clamp means for releasing the yarn end and the step of operating the slack applying means for releasing the pulled out core yarn section.
- the tension applying means is operated to apply the first tension during the pulling out of the core yarn section of the core yarn from the core yarn package.
- the method may be executed using the core yarn supplying unit and the spinning machine described above.
- a spinning machine 1 includes a plurality of spinning units 2, a yarn joining cart 3, a blower box 4, and a motor box 5.
- the plurality of spinning units 2 are arranged in a line.
- Each spinning unit 2 produces a spun yarn Y from a sliver S and a core yarn C, and winds the spun yarn Y into a package P.
- the yarn joining cart 3 performs a yarn joining operation in the spinning unit 2 in which the spun yarn Y has been disconnected.
- the blower box 4 accommodates an air supply source and the like for generating a suction flow, a whirling airflow, or the like at each section of the spinning unit 2.
- the motor box 5 accommodates a motor and the like for supplying power to each section of the spinning unit 2.
- a side on which the sliver S is supplied is referred to as upstream and a side on which the spun yarn Y is wound is referred to as downstream.
- a side on which the spun yarn Y travels with respect to the yarn joining cart 3 is referred to as a front side, and a side opposite to the front side is referred to as a back side.
- a work passage (not illustrated) extending in a direction in which the plurality of spinning units 2 are arranged is provided on the front side of the spinning machine 1. Therefore, the operator can perform operation, monitoring, and the like of each spinning unit 2 from the work passage.
- each spinning unit 2 includes a draft device 6, a core yarn supplying device 40, a pneumatic spinning device 7, a spun yarn monitoring device 8, a tension sensor 9, a yarn storage device 14, a waxing device 11, and a winding device 12 in this order from the upstream.
- These devices are directly or indirectly supported by a machine frame 13 such that the upstream is an upper side in a machine height direction (i.e., downstream is a lower side in the machine height direction).
- the devices excluding the core yarn supplying device 40 are referred to as a main body unit 30. That is, the main body unit 30 is configured by the draft device 6, the pneumatic spinning device 7, the spun yarn monitoring device 8, the tension sensor 9, the yarn storage device 14, the waxing device 11, the winding device 12, and the machine frame 13.
- the draft device 6 is adapted to draft the sliver S to produce a fiber bundle F.
- the draft device 6 includes a back roller pair 15, a third roller pair 16, a middle roller pair 18 provided with an apron belt 17 on each roller, and a front roller pair 19 in this order from the upstream.
- Each of the roller pairs 15, 16, 18, and 19 causes the sliver S supplied from a can (not illustrated) to travel from the upstream towards the downstream while drafting.
- the core yarn supplying device 40 unwinds the core yarn C from a core yarn package CP, and supplies the core yarn C to the draft device 6. More specifically, the core yarn supplying device 40 supplies the core yarn C to a travelling path of the fiber bundle F from between the middle roller pair 18 and the front roller pair 19. The core yarn C is thus supplied to the pneumatic spinning device 7 together with the fiber bundle F.
- the pneumatic spinning device 7 produces the spun yarn Y by applying twists to the fiber bundle F with the core yarn C as a core. More specifically (although not illustrated), the pneumatic spinning device 7 includes a spinning chamber, a fiber core yarn guide, a whirling airflow generating nozzle, and a hollow guide shaft body.
- the fiber core yarn guide guides the fiber bundle F supplied from the upstream draft device 6 and the core yarn C to the spinning chamber.
- the whirling airflow generating nozzle is arranged at a periphery of the travelling path of the fiber bundle F and the core yarn C, and is adapted to generate a whirling airflow in the spinning chamber. This whirling airflow causes a fiber end of the fiber bundle F guided into the spinning chamber to be reversed and to whirl.
- the hollow guide shaft body is adapted to guide the spun yarn Y from the spinning chamber to outside the pneumatic spinning device 7.
- the spun yarn monitoring device 8 is adapted to monitor the travelling spun yarn Y between the pneumatic spinning device 7 and the yarn storage device 14. When a yarn defect is detected in the spun yarn Y, the spun yarn monitoring device 8 transmits a yarn defect detection signal to a unit control device 10.
- the spun yarn monitoring device 8 detects, for example, a thickness abnormality of the spun yarn Y and/or foreign substance contained in the spun yarn Y as the yarn defect.
- the tension sensor 9 measures a tension of the travelling spun yarn Y between the pneumatic spinning device 7 and the yarn storage device 14, and transmits a tension measurement signal to the unit control device 10.
- the waxing device 11 is adapted to apply wax on the travelling spun yarn Y between the yarn storage device 14 and the winding device 12.
- the unit control device 10 is provided for each spinning unit 2, and is adapted to control operation of the spinning unit 2 under the control of a machine control device 20, which is a high-order controller.
- the yarn storage device 14 is adapted to store the travelling spun yarn Y between the pneumatic spinning device 7 and the winding device 12.
- the yarn storage device 14 has a function of stably pulling out the spun yarn Y from the pneumatic spinning device 7, a function of storing the spun yarn Y fed from the pneumatic spinning device 7 to prevent the spun yarn Y from slackening during the yarn joining operation by the yarn joining cart 3 or the like, and a function of adjusting the tension of the spun yarn Y at downstream of the yarn storage device 14 to prevent a fluctuation in the tension of the spun yarn Y at the downstream from being transmitted towards the pneumatic spinning device 7.
- the winding device 12 is adapted to wind the spun yarn Y produced by the pneumatic spinning device 7 around a bobbin B to form the package P.
- the winding device 12 includes a cradle arm 21, a winding drum 22, and a traverse device 23.
- the cradle arm 21 rotatably supports the bobbin B.
- the cradle arm 21 is swingably supported by a supporting shaft 24, and causes a surface of the rotatably supporting bobbin B or a surface of the package P to make contact with a surface of the winding drum 22 at an appropriate pressure.
- the winding drum 22 is driven by an electric motor (not illustrated) provided in each spinning unit 2 to rotate the bobbin B or the package P making contact with the winding drum 22.
- the traverse device 23 is driven by a shaft 25 shared among the plurality of spinning units 2, and traverses the spun yarn Y over a prescribed width with respect to the rotating bobbin B or the package P.
- the yarn joining cart 3 travels to the spinning unit 2 in which the spun yarn Y is disconnected to perform the yarn joining operation in the target spinning unit 2.
- the yarn joining cart 3 includes a yarn joining device 26, a first yarn catching and guiding device 27, and a second yarn catching and guiding device 28.
- the first yarn catching and guiding device 27 is swingably supported by a supporting shaft 27a, and is adapted to suck and catch a yarn end of the spun yarn Y from the pneumatic spinning device 7 to guide the yarn end to the yarn joining device 26.
- the second yarn catching and guiding device 28 is swingably supported by a supporting shaft 28a, and is adapted to suck and catch a yarn end of the spun yarn Y from the winding device 12 to guide the yarn end to the yarn joining device 26.
- the yarn joining device 26 is a splicer, for example, and joins the guided yarn ends.
- the core yarn supplying device 40 includes a core yarn package holding section 41, a core yarn supplying unit 50, and a core yarn guiding section 43.
- the core yarn package holding section 41 holds the core yarn package CP with a center line of the core yarn package CP extended in a horizontal and front-back direction.
- a mono-filament yarn or a false-twisted yarn, for example, is wound as the core yarn C in the core yarn package CP.
- the mono-filament yarn is a yarn having high rigidity.
- the false-twisted yarn is a yarn having high stretchability.
- the core yarn supplying unit 50 has a function of applying a tension to the core yarn C supplied from the core yarn package CP via a guide roller 42, a function of applying slackening to the core yarn C, and a function of feeding the yarn end of the core yarn C.
- the core yarn guiding section 43 is a tubular member adapted to guide the core yarn C to the draft device 6. A travelling region of the core yarn C is formed inside the core yarn guiding section 43 so as to include a straight line.
- a side on which the core yarn C is supplied from the core yarn package CP to the core yarn supplying unit 50 is referred to as upstream, and a side on which the core yarn C is supplied from the core yarn supplying unit 50 to the draft device 6 is referred to as downstream.
- the core yarn supplying unit 50 includes a unit base 51, a tension applying section 60, a slack applying section 70, a core yarn monitoring section 81, and a core yarn feeding section 90.
- a core yarn guide 55 is arranged most upstream of the unit base 51.
- the unit base 51 supports the tension applying section 60, the slack applying section 70, the core yarn monitoring section 81, and the core yarn feeding section 90.
- the tension applying section 60 applies a tension to the core yarn C to be supplied to the draft device 6.
- the slack applying section 70 applies slack to the core yarn C between the tension applying section 60 and the core yarn monitoring section 81.
- the core yarn monitoring section 81 detects a presence and/or an absence of the core yarn C between the slack applying section 70 and the core yarn feeding section 90.
- the core yarn feeding section 90 feeds the yarn end of the core yarn C to the draft device 6 through the core yarn guiding section 43 at downstream of the core yarn monitoring section 81.
- a description "feeding the yarn end of the core yarn C” refers to an operation in which the core yarn feeding section 90 feeds the yarn end of the core yarn C to the main body unit 30.
- a description “supply the core yarn C” refers to an operation in which the core yarn supplying device 40 continuously supplies the core yarn C to the main body unit 30 (i.e., the operation when spinning is carried out).
- the core yarn supplying unit 50 further includes a supporting member (supporting section) 52, a first holding member (holding section) 53, and a second holding member (holding section) 54.
- the supporting member 52 swingably supports the unit base 51 with respect to the draft device 6. More specifically, the supporting member 52 is detachably attached to a draft base 29 of the draft device 6.
- a distal end portion 52a of the supporting member 52 is rotatably attached to one end of a swing shaft 51a arranged on the unit base 51. That is, one end of the supporting member 52 is supported by the swing shaft 51a.
- the draft base 29 is a base shared between the draft devices 6 of the pair of adjacent spinning units 2, and supports each roller pair 15, 16, 18, 19 (specifically, the bottom roller of each roller pair 15, 16, 18, 19) of each draft device 6.
- the draft base 29 is provided with a first hole 29a, a bent portion 29b, and a plurality of second holes 29c.
- the plurality of second holes 29c are formed between the first hole 29a and the bent portion 29b.
- the first holding member 53 holds the unit base 51 at a core yarn supplying position. More specifically, the first holding member 53 is fixed to the unit base 51. The first holding member 53 holds the unit base 51 at the core yarn supplying position by engaging a distal end portion 53a of the first holding member 53 to the first hole 29a.
- the core yarn supplying position is a position where the unit base 51 is arranged when the core yarn supplying unit 50 supplies the core yarn C to the draft device 6.
- the second holding member 54 holds the unit base 51 at one of a plurality of retreated positions. More specifically, the second holding member 54 is swingably supported by a supporting shaft 51b arranged on the unit base 51. The second holding member 54 holds the unit base 51 at the retreated position by engaging a distal end portion 54a of the second holding member 54 to the bent portion 29b. Furthermore, the second holding member 54 holds the unit base 51 at one of other plurality of retreated positions by engaging the distal end portion 54a to one of the plurality of second holes 29c.
- the retreated position is a position where the unit base 51 is arranged when the core yarn supplying unit 50 is not supplying the core yarn C to the main body unit 30, and is the position where the core yarn feeding section 90 is located away from the draft device 6 than when the unit base 51 is held at the core yarn supplying position.
- the tension applying section 60 includes a tension applying mechanism 61 and an operating mechanism 62.
- the tension applying mechanism 61 applies a tension to the core yarn C by guiding the core yarn C in a zigzag manner by a fixed piece 63 and a movable piece 64.
- the fixed piece 63 is fixed to the unit base 51.
- the movable piece 64 is supported to be openable/closable with respect to the fixed piece 63 by a supporting shaft (not illustrated) arranged on the fixed piece 63.
- the movable piece 64 is urged in an opening direction with respect to the fixed piece 63 by a spring (not illustrated) arranged on the fixed piece 63.
- the movable piece 64 includes a plurality protrusions 64a so as to project out with respect to the plurality of shafts 63a. As illustrated in FIG. 6B , each protrusion 64a is arranged on the movable piece 64 such that each protrusion 64a is alternately located with each shaft 63a under a state where the movable piece 64 is closed with respect to the fixed piece 63.
- a hole 64b, through which the core yarn C is inserted, is formed at a distal end portion of each protrusion 64a.
- a first tension is applied to the core yarn C under a state where the core yarn C is passed through the fixed piece 63 and the movable piece 64, and the movable piece 64 is opened with respect to the fixed piece 63.
- a state of the tension applying mechanism 61 in this case is referred to as a tension applying state.
- a second tension smaller than the first tension is applied to the core yarn C under a state where the core yarn C is passed through the fixed piece 63 and the movable piece 64, and the movable piece 64 is closed with respect to the fixed piece 63.
- a state of the tension applying mechanism 61 in this case is referred to as a tension non-applying state.
- the second tension also includes a case in which the tension applied to the core yarn C is zero.
- the operating mechanism 62 includes an operation member 65 and an air cylinder 66.
- the operation member 65 is arranged such that a distal end portion 65a of the operation member 65 makes contact with the movable piece 64 from a side opposite to the fixed piece 63.
- the movable piece 64 urged in the opening direction with respect to the fixed piece 63 is opened/closed with respect to the fixed piece 63 when the operation member 65 is moved by the air cylinder 66.
- the operating mechanism 62 changes the tension applying mechanism 61 to the tension applying state and the tension non-applying state.
- the slack applying section 70 includes an arm 71 and an air cylinder 72.
- the arm 71 is swingably supported by a supporting shaft 51c arranged on the unit base 51.
- a hole 73, through which the core yarn C is inserted, is formed at a distal end portion of the arm 71.
- the hole 73 includes an edge 73a of a closed annular shape (circular shape in the present embodiment) .
- a material excellent in wear resistance such as ceramic, for example, is used for the edge 73a.
- the arm 71 is swung to a normal position and a standby position by the air cylinder 72.
- the normal position is a position where the hole 73 is located on the travelling path of the core yarn C (position of solid line in FIG. 3 ).
- the standby position is a position where the hole 73 is located away from the travelling path of the core yarn C to the side opposite to the unit base 51 (position of chain double dashed line in FIG. 3 ).
- the core yarn monitoring section 81 detects the presence and/or the absence of the core yarn C between the slack applying section 70 and the core yarn feeding section 90.
- a core yarn guide 56 adapted to guide the core yarn C is arranged upstream of the core yarn monitoring section 81.
- a core yarn guide 57 adapted to guide the core yarn C is arranged downstream of the core yarn monitoring section 81.
- the core yarn feeding section 90 includes an air sucker 91 and a clamp cutter 92.
- a travelling region of the core yarn C is formed inside the core yarn feeding section 90 so as to include a straight line.
- the air sucker 91 includes a core yarn feeding nozzle block 93, a core yarn feeding nozzle 94, and a tube body 95.
- the core yarn feeding nozzle 94 which becomes a part of the travelling path of the core yarn C, is arranged inside the core yarn feeding nozzle block 93.
- the tube body 95 which becomes a part of the travelling path of the core yarn C, is arranged downstream of the core yarn feeding nozzle 94.
- a compressed air is supplied from outside to the travelling path of the core yarn C.
- the core yarn feeding section 90 feeds the core yarn C to the core yarn guiding section 43 by action of the compressed air.
- the clamp cutter 92 includes a clamp member 96, a cutter 97, and an air cylinder 98.
- the clamp member 96 is operated by the air cylinder 98 to clamp the core yarn C at the downstream of the air sucker 91.
- the cutter 97 is operated by the air cylinder 98 to cut the core yarn C at downstream of the clamp member 96.
- the clamp cutter 92 is set such that a timing to cut the core yarn C is after a timing to clamp the core yarn C.
- the core yarn supplying unit 50 is arranged outside a work region R for setting the sliver (the fiber bundle) S to the draft device 6.
- the work region R is a region on a back side (upstream) of the draft device 6, and is the region for inserting the sliver S to a tubular guiding member 6a arranged in the draft device 6.
- the core yarn feeding section 90 and the core yarn guiding section 43 are arranged such that the respective travelling regions of the core yarn C include the same straight line L.
- An angle ⁇ formed by the straight line L and the travelling path of the fiber bundle F in the draft device 6 is 10 degrees to 70 degrees (preferably, 30 degrees to 50 degrees), when seen from a direction perpendicular to both a rotation center line of each roller constituting each roller pair 15, 16, 18, 19 and the travelling path of the fiber bundle F in the draft device 6. That is, the travelling path of the core yarn C in the core yarn feeding section 90 and the core yarn guiding section 43 merges with the travelling path of the fiber bundle F between the middle roller pair 18 and the front roller pair 19 from a direction inclined by 10 degrees to 70 degrees (preferably, 30 degrees to 50 degrees) with respect to the travelling path of the fiber bundle F in the draft device 6.
- the core yarn supplying unit 50 further includes a first air supply tube 82, a second air supply tube 83, a relay substrate (substrate, board, circuit board) 84, and a multi-core cable 85.
- the first air supply tube 82 is pulled out to an outside of the unit base 51, and is removably connected to an air supply tube (not illustrated) of the main body unit 30.
- the first air supply tube 82 is connected to each of the air cylinder 66 of the tension applying section 60, the air cylinder 72 of the slack applying section 70, and the air cylinder 98 of the clamp cutter 92 via a plurality of pipes (not illustrated) arranged in the unit base 51.
- the compressed air is thereby supplied from the air supply source of the blower box 4 to each of the air cylinders 66, 72, and 98 through the air supply tube of the main body unit 30.
- the second air supply tube 83 is pulled out to the outside of the unit base 51, and is removably connected to the air supply tube of the main body unit 30.
- the second air supply tube 83 is connected to the air sucker 91 via a pipe (not illustrated) arranged in the unit base 51. The compressed air is thereby supplied from the air supply source of the blower box 4 to the air sucker 91 through the air supply tube of the main body unit 30.
- the relay substrate 84 is supported by the unit base 51.
- the relay substrate 84 is electrically connected to each of an electromagnetic valve for operation of the air sucker 91 of the core yarn feeding section 90, an electromagnetic valve for operation of the air cylinder 66 of the tension applying section 60, an electromagnetic valve for operation of the air cylinder 72 of the slack applying section 70, an electromagnetic valve for operation of the air cylinder 98 of the clamp cutter 92, and the core yarn monitoring section 81 via a plurality of wires (cables) (not illustrated) arranged in the unit base 51.
- the multi-core cable 85 is pulled out to the outside of the unit base 51, and is removably connected to a multi-core cable (not illustrated) of the main body unit 30 via a connector (not illustrated), for example.
- the multi-core cable 85 is a cable in which a plurality of wires are bundled to input/output electric signals to each section of the core yarn supplying unit 50, and is connected to the relay substrate 84. Each section of the core yarn supplying unit 50 is thus controlled by the unit control device 10 of the main body unit 30.
- the core yarn supplying unit 50 When the core yarn C is supplied to the main body unit 30 and the spun yarn Y is produced from the sliver S and the core yarn C (i.e., when the spinning is carried out), the core yarn supplying unit 50 is located at the core yarn supplying position and the tension applying section 60 causes the tension applying mechanism 61 to be in the tension applying state to apply the first tension to the core yarn C, as illustrated in FIG. 4 .
- the arm 71 of the slack applying section 70 is located at the normal position (i.e., the position where the hole 73 is located on the travelling path of the core yarn C).
- the core yarn supplying unit 50 supplies the core yarn C to the draft device 6 while applying the first tension to the core yarn C unwound from the core yarn package CP.
- the clamp cutter 92 is operated to clamp and cut the core yarn C, as illustrated in FIG. 9 .
- the yarn end of the core yarn C pulled out from the core yarn package CP is thereby clamped by the clamp cutter 92.
- the arm 71 of the slack applying section 70 is swung to the standby position, the core yarn C inserted through the hole 73 is pulled up, and the core yarn C is unwound from the core yarn package CP by an amount in which the core yarn C is pulled up.
- the clamp cutter 92 is operated to release the clamping of the yarn end of the core yarn C, as illustrated in FIG. 10 .
- the arm 71 of the slack applying section 70 is then swung to the normal position.
- the tension applying section 60 changes the tension applying mechanism 61 to the tension non-applying state, so that the tension applying mechanism 61 applies the second tension smaller than the first tension to the core yarn C.
- the air sucker 91 is operated under this state. The yarn end of the core yarn C is thereby fed out to the draft device 6 through the core yarn guiding section 43.
- the tension applying mechanism 61 is in the tension non-applying state when the core yarn feeding section 90 feeds out the yarn end of the core yarn C to the draft device 6 (i.e., when the supplying of the core yarn C to the pneumatic spinning device 7 is started).
- the state returns to the state illustrated in FIG. 4 . That is, the clamp cutter 92 and the air sucker 91 are not operated, and the tension applying section 60 causes the tension applying mechanism 61 to be under the tension applying state to apply the first tension to the core yarn C.
- the core yarn supplying unit 50 is to be held at the retreated position using the second holding member 54, as illustrated in FIG. 5 , without detaching the core yarn supplying unit 50.
- the holding by the second holding member 54 is released and the core yarn supplying unit 50 is set to the core yarn supplying position using the first holding member 53.
- the tension to be applied to the core yarn C can be changed by changing the tension applying mechanism 61 to the tension applying state and the tension non-applying state.
- the tension to be applied to the core yarn C by the tension applying section 60 can be reduced while applying the slack to the core yarn C by the slack applying section 70, the yarn end of the core yarn C can be reliably fed out to the main body unit 30 by the core yarn feeding section 90.
- the tension applying mechanism 61 is provided under the tension non-applying state when the core yarn feeding section 90 feeds out the yarn end of the core yarn C to the main body unit 30.
- the tension applied to the core yarn C is small when the yarn end of the core yarn C is fed out, the yarn end of the core yarn C can be reliably fed out to the main body unit 30.
- the slack applying section 70 includes the hole 73 through which the core yarn C is inserted, the hole 73 having the closed edge 73a.
- the core yarn C thus does not fall out from the hole 73, and the slack is reliably applied to the core yarn C.
- the yarn end of the core yarn C thus can be reliably fed out to the main body unit 30.
- the edge 73a is circular.
- the core yarn C thus can be smoothly guided by the hole 73 of the slack applying section 70, and the yarn end of the core yarn C can be reliably fed out to the main body unit 30.
- the yarn end of the core yarn C unwound from the core yarn package CP can be reliably fed out to the main body unit 30.
- the core yarn supplying device 40 further includes the tubular core yarn guiding section 43 adapted to guide the core yarn C to the main body unit 30, and the travelling region of the core yarn C is formed inside the core yarn guiding section 43 so as to include a straight line.
- the yarn end of the core yarn C thus can smoothly travel inside the core yarn guiding section 43, and the yarn end of the core yarn C can be reliably fed out to the main body unit 30.
- a pressure loss of air inside the core yarn guiding section 43 is suppressed, the core yarn C can be reliably fed out to the main body unit 30.
- the cleaning can be easily carried out even if oil solution used for spinning is accumulated in the core yarn feeding section 90 and/or the core yarn guiding section 43.
- the yarn end of the core yarn C can be reliably fed out to the main body unit 30.
- the first tension is applied to the core yarn C when supplying the core yarn C to the main body unit 30, and the second tension smaller than the first tension is applied to the core yarn C when feeding out the yarn end of the core yarn C to the main body unit 30.
- the yarn end of the core yarn C can be reliably fed out to the main body unit 30.
- the operating mechanism 62 is not limited to the configuration described above, and various configurations can be applied.
- a cam coupled with a motor may be used without using the operation member 65 and the air cylinder 66.
- the shape of the edge 73a of the slack applying section 70 is not limited to a circular shape, and may be a polygonal shape, for example. Furthermore, the edge 73a is not limited to an annular shape, and may be a C-shape, for example.
- the material of the edge 73a is not limited to ceramic, and may be metal.
- the type of core yarn C may be other than the mono-filament yarn or the false-twisted yarn.
- the core yarn C may be a multi-filament yarn having lower rigidity than the mono-filament yarn, or may be a yarn having lower crimping property than the false-twisted yarn.
- the core yarn C may be a textured yarn, an air textured yarn (e.g., yarn in which spandex and textured yarn are interlaced, yarn having similar crimping property as the textured yarn), or a spun yarn (generally-used spun yarn).
- the unit control device 10 and the machine control device 20 merely need to be control devices that directly or indirectly control at least each section of the core yarn supplying unit 50, and arranging positions and the like are not limited.
- the unit control device 10 may be arranged, not for each spinning unit 2, but for each group of the plurality of spinning units 2.
- each structure of the spinning machine 1 are not limited to the material and the shape described above, and various materials and shapes can be applied.
- each device is arranged such that the spun yarn Y supplied from the upper side is wound on the lower side, but each device may be arranged such that the yarn supplied from the lower side is wound on the upper side.
- each roller pair of the draft device 6 and the traverse mechanism of the traverse device 23 are driven by the power from the motor box 5 (i.e., commonly driven for the plurality of spinning units 2).
- each section of the spinning unit 2 e. g. , the draft device 6, the pneumatic spinning device 7, the winding device 12, or the like
- each section of the spinning unit 2 may be independently driven for each spinning unit 2.
- the pneumatic spinning device 7 may further include a needle held by the fiber core yarn guide and arranged to project out into a spinning chamber to prevent the twists of the fiber bundle F from being transmitted to the upstream of the pneumatic spinning device 7.
- the pneumatic spinning device 7 may prevent the twists of the fiber bundle F from being propagated towards the upstream of the pneumatic spinning device 7 by a downstream end of the fiber core yarn guide.
- the pneumatic spinning device 7 may include a pair of air jet nozzles adapted to apply twists in opposite directions from each other.
- the tension sensor 9 may be arranged upstream of the spun yarn monitoring device 8.
- the yarn storage device 14 has a function of pulling out the spun yarn Y from the pneumatic spinning device 7, but the spun yarn Y may be pulled out by a delivery roller and a nip roller.
- the waxing device 11, the tension sensor 9, and the spun yarn monitoring device 8 may not be arranged in the spinning unit 2.
- the winding device 12 may be driven by a common driving source for the plurality of spinning units 2.
- the cradle arm 21 is moved by an air cylinder (not illustrated) such that the package P moves away from the winding drum 22, and the package P is reversely rotated by a reverse rotation roller (not illustrated) arranged in the yarn joining cart 3.
Description
- The present invention relates to a core yarn supplying unit, a core yarn supplying device, a spinning machine, and a core yarn supplying method.
- As a conventional core yarn supplying unit, there is known a core yarn supplying unit including a core yarn feeding section adapted to feed out a yarn end of a core yarn to a draft device, a tension applying section adapted to apply a tension to the core yarn to be supplied to the draft device, and a slack applying section adapted to apply slack to the core yarn between the core yarn feeding section and the tension applying section (see e.g., Japanese Unexamined Patent Publication No.
2012-131591 - The core yarn supplying unit described above is demanded to reliably feed out the yarn end of the core yarn to a main body unit configured by the draft device and the like at the start of spinning, for example.
- It is an object of the present invention to provide a core yarn supplying unit and a core yarn supplying method capable of reliably feeding out a yarn end of a core yarn, and a core yarn supplying device and a spinning machine including the core yarn supplying unit.
- A core yarn supplying unit of the present invention includes a core yarn feeding section arranged to feed out a yarn end of a core yarn; a tension applying section adapted to apply a tension to the core yarn; and a slack applying section adapted to apply slack to the core yarn between the core yarn feeding section and the tension applying section, wherein the tension applying section includes: a tension applying mechanism adapted to apply the tension to the core yarn, and an operating mechanism adapted to change the tension applying mechanism to a tension applying state and a tension non-applying state.
- In the core yarn supplying unit, the tension to be applied to the core yarn can be changed by changing the tension applying mechanism to the tension applying state and the tension non-applying state. Thus, since the tension to be applied to the core yarn by the tension applying section can be reduced while applying the slack to the core yarn by the slack applying section, the yarn end of the core yarn can be reliably fed out by the core yarn feeding section.
- In the core yarn supplying unit of the present invention, the tension applying mechanism may be provided under the tension non-applying state when the core yarn feeding section feeds out the yarn end of the core yarn to the main body unit. According to such a configuration, since the tension applied to the core yarn is small when the yarn end of the core yarn is fed out, the yarn end of the core yarn can be reliably fed out.
- In the core yarn supplying unit of the present invention, the slack applying section may include a hole through which the core yarn is inserted, the hole having a closed edge. According to such a configuration, the core yarn does not fall out from the hole, and thus the slack is reliably applied to the core yarn. The yarn end of the core yarn thus can be reliably fed out.
- In the core yarn supplying unit of the present invention, the edge may be circular. According to such a configuration, since the core yarn can be smoothly guided by the hole of the slack applying section, the yarn end of the core yarn can be reliably fed out.
- A core yarn supplying device according to the present invention includes the core yarn supplying unit described above; and a core yarn package holding section adapted to hold a core yarn package.
- In the core yarn supplying device, the yarn end of the core yarn unwound from the core yarn package can be reliably fed out.
- The core yarn supplying device of the present invention further includes a tubular core yarn guiding section adapted to guide the core yarn fed out from the core yarn supplying unit, wherein a travelling region of the core yarn is formed inside the core yarn guiding section so as to include a straight line. According to such a configuration, since the yarn end of the core yarn can smoothly travel inside the core yarn guiding section, the yarn end of the core yarn can be reliably fed out.
- A spinning machine according to the present invention includes the core yarn supplying unit described above; a draft device adapted to draft a fiber bundle; a pneumatic spinning device adapted to produce a spun yarn by applying twists to the fiber bundle with the core yarn as a core; and a winding device adapted to wind the spun yarn into a package, wherein the tension applying mechanism is provided under the tension non-applying state when supplying of the core yarn to the pneumatic spinning device is started.
- According to the spinning machine, since the tension applied to the core yarn is small when the supplying of the core yarn to the pneumatic spinning device is started, the yarn end of the core yarn can be reliably fed out from the core yarn supplying unit.
- A core yarn supplying method according to the present invention is a core yarn supplying method for supplying a core yarn from a core yarn package while applying a tension to the unwound core yarn, the method including the steps of: applying a first tension to the core yarn when supplying the core yarn; and applying a second tension smaller than the first tension to the core yarn when feeding out a yarn end of the core yarn.
- In the core yarn supplying method, since the tension applied to the core yarn is small when feeding out the core yarn, the yarn end of the core yarn can be reliably fed out.
- To advantage, the core yarn supplying method may comprise the step of operating tension applying means for applying the second tension to the core yarn during the feeding out of the yarn end of the core yarn and the step of operating said tension applying means for applying the first tension to the core yarn during the subsequent supplying of the core yarn. For preparing the feeding out of the yarn end of the core yarn, the method may comprise the step of operating clamp means for clamping the yarn end and the step of operating slack applying means for pulling out a core yarn section of the core yarn from the core yarn package. For allowing the feeding out of the yarn end of the core yarn, the method may further comprise the step of operating the clamp means for releasing the yarn end and the step of operating the slack applying means for releasing the pulled out core yarn section. According to a preferred embodiment of the method, the tension applying means is operated to apply the first tension during the pulling out of the core yarn section of the core yarn from the core yarn package. The method may be executed using the core yarn supplying unit and the spinning machine described above.
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FIG. 1 is a front view of a spinning machine according to one embodiment of the present invention; -
FIG. 2 is a side view of a spinning unit of the spinning machine ofFIG. 1 ; -
FIG. 3 is a perspective view of a core yarn supplying unit of the spinning unit ofFIG. 2 ; -
FIG. 4 is a side view of the core yarn supplying unit and a peripheral portion in the spinning unit ofFIG. 2 ; -
FIG. 5 is a side view of the core yarn supplying unit and the peripheral portion in the spinning unit ofFIG. 2 ; -
FIGS. 6A and 6B are side views of a tension applying section of the core yarn supplying unit ofFIG. 3 ; -
FIG. 7 is a partial cross-sectional view of a core yarn feeding section of the core yarn supplying unit ofFIG. 3 ; -
FIG. 8 is a view illustrating a positional relationship of the draft device and the core yarn supplying unit in the spinning unit ofFIG. 2 ; -
FIG. 9 is a side view of the core yarn supplying unit and the peripheral portion in the spinning unit ofFIG. 2 ; and -
FIG. 10 is a side view of the core yarn supplying unit and the peripheral portion in the spinning unit ofFIG. 2 . - Preferred embodiments of the present invention will be hereinafter described in detail with reference to the drawings. In the drawings, the same reference numerals are denoted for the same or corresponding portions, and redundant description will be omitted.
- As illustrated in
FIG. 1 , aspinning machine 1 includes a plurality ofspinning units 2, ayarn joining cart 3, ablower box 4, and amotor box 5. The plurality ofspinning units 2 are arranged in a line. Eachspinning unit 2 produces a spun yarn Y from a sliver S and a core yarn C, and winds the spun yarn Y into a package P. Theyarn joining cart 3 performs a yarn joining operation in thespinning unit 2 in which the spun yarn Y has been disconnected. Theblower box 4 accommodates an air supply source and the like for generating a suction flow, a whirling airflow, or the like at each section of thespinning unit 2. Themotor box 5 accommodates a motor and the like for supplying power to each section of thespinning unit 2. - In the following description, on a travelling path of the sliver S and the spun yarn Y, a side on which the sliver S is supplied is referred to as upstream and a side on which the spun yarn Y is wound is referred to as downstream. A side on which the spun yarn Y travels with respect to the
yarn joining cart 3 is referred to as a front side, and a side opposite to the front side is referred to as a back side. In the present embodiment, a work passage (not illustrated) extending in a direction in which the plurality ofspinning units 2 are arranged is provided on the front side of thespinning machine 1. Therefore, the operator can perform operation, monitoring, and the like of eachspinning unit 2 from the work passage. - As illustrated in
FIGS. 1 and2 , eachspinning unit 2 includes adraft device 6, a coreyarn supplying device 40, apneumatic spinning device 7, a spunyarn monitoring device 8, atension sensor 9, ayarn storage device 14, awaxing device 11, and awinding device 12 in this order from the upstream. These devices are directly or indirectly supported by amachine frame 13 such that the upstream is an upper side in a machine height direction (i.e., downstream is a lower side in the machine height direction). In thespinning unit 2, the devices excluding the coreyarn supplying device 40 are referred to as amain body unit 30. That is, themain body unit 30 is configured by thedraft device 6, thepneumatic spinning device 7, the spunyarn monitoring device 8, thetension sensor 9, theyarn storage device 14, thewaxing device 11, thewinding device 12, and themachine frame 13. - The
draft device 6 is adapted to draft the sliver S to produce a fiber bundle F. Thedraft device 6 includes aback roller pair 15, athird roller pair 16, amiddle roller pair 18 provided with anapron belt 17 on each roller, and afront roller pair 19 in this order from the upstream. Each of theroller pairs - The core
yarn supplying device 40 unwinds the core yarn C from a core yarn package CP, and supplies the core yarn C to thedraft device 6. More specifically, the coreyarn supplying device 40 supplies the core yarn C to a travelling path of the fiber bundle F from between themiddle roller pair 18 and thefront roller pair 19. The core yarn C is thus supplied to thepneumatic spinning device 7 together with the fiber bundle F. - The
pneumatic spinning device 7 produces the spun yarn Y by applying twists to the fiber bundle F with the core yarn C as a core. More specifically (although not illustrated), thepneumatic spinning device 7 includes a spinning chamber, a fiber core yarn guide, a whirling airflow generating nozzle, and a hollow guide shaft body. The fiber core yarn guide guides the fiber bundle F supplied from theupstream draft device 6 and the core yarn C to the spinning chamber. The whirling airflow generating nozzle is arranged at a periphery of the travelling path of the fiber bundle F and the core yarn C, and is adapted to generate a whirling airflow in the spinning chamber. This whirling airflow causes a fiber end of the fiber bundle F guided into the spinning chamber to be reversed and to whirl. The hollow guide shaft body is adapted to guide the spun yarn Y from the spinning chamber to outside thepneumatic spinning device 7. - The spun
yarn monitoring device 8 is adapted to monitor the travelling spun yarn Y between thepneumatic spinning device 7 and theyarn storage device 14. When a yarn defect is detected in the spun yarn Y, the spunyarn monitoring device 8 transmits a yarn defect detection signal to aunit control device 10. The spunyarn monitoring device 8 detects, for example, a thickness abnormality of the spun yarn Y and/or foreign substance contained in the spun yarn Y as the yarn defect. Thetension sensor 9 measures a tension of the travelling spun yarn Y between thepneumatic spinning device 7 and theyarn storage device 14, and transmits a tension measurement signal to theunit control device 10. The waxingdevice 11 is adapted to apply wax on the travelling spun yarn Y between theyarn storage device 14 and the windingdevice 12. Theunit control device 10 is provided for eachspinning unit 2, and is adapted to control operation of thespinning unit 2 under the control of amachine control device 20, which is a high-order controller. - The
yarn storage device 14 is adapted to store the travelling spun yarn Y between thepneumatic spinning device 7 and the windingdevice 12. Theyarn storage device 14 has a function of stably pulling out the spun yarn Y from thepneumatic spinning device 7, a function of storing the spun yarn Y fed from thepneumatic spinning device 7 to prevent the spun yarn Y from slackening during the yarn joining operation by theyarn joining cart 3 or the like, and a function of adjusting the tension of the spun yarn Y at downstream of theyarn storage device 14 to prevent a fluctuation in the tension of the spun yarn Y at the downstream from being transmitted towards thepneumatic spinning device 7. - The winding
device 12 is adapted to wind the spun yarn Y produced by thepneumatic spinning device 7 around a bobbin B to form the package P. The windingdevice 12 includes acradle arm 21, a windingdrum 22, and atraverse device 23. Thecradle arm 21 rotatably supports the bobbin B. Thecradle arm 21 is swingably supported by a supportingshaft 24, and causes a surface of the rotatably supporting bobbin B or a surface of the package P to make contact with a surface of the windingdrum 22 at an appropriate pressure. The windingdrum 22 is driven by an electric motor (not illustrated) provided in eachspinning unit 2 to rotate the bobbin B or the package P making contact with the windingdrum 22. Thetraverse device 23 is driven by ashaft 25 shared among the plurality of spinningunits 2, and traverses the spun yarn Y over a prescribed width with respect to the rotating bobbin B or the package P. - The
yarn joining cart 3 travels to thespinning unit 2 in which the spun yarn Y is disconnected to perform the yarn joining operation in thetarget spinning unit 2. Theyarn joining cart 3 includes ayarn joining device 26, a first yarn catching and guidingdevice 27, and a second yarn catching and guidingdevice 28. The first yarn catching and guidingdevice 27 is swingably supported by a supportingshaft 27a, and is adapted to suck and catch a yarn end of the spun yarn Y from thepneumatic spinning device 7 to guide the yarn end to theyarn joining device 26. The second yarn catching and guidingdevice 28 is swingably supported by a supportingshaft 28a, and is adapted to suck and catch a yarn end of the spun yarn Y from the windingdevice 12 to guide the yarn end to theyarn joining device 26. Theyarn joining device 26 is a splicer, for example, and joins the guided yarn ends. - As illustrated in
FIG. 2 , the coreyarn supplying device 40 includes a core yarnpackage holding section 41, a coreyarn supplying unit 50, and a coreyarn guiding section 43. The core yarnpackage holding section 41 holds the core yarn package CP with a center line of the core yarn package CP extended in a horizontal and front-back direction. A mono-filament yarn or a false-twisted yarn, for example, is wound as the core yarn C in the core yarn package CP. The mono-filament yarn is a yarn having high rigidity. The false-twisted yarn is a yarn having high stretchability. The coreyarn supplying unit 50 has a function of applying a tension to the core yarn C supplied from the core yarn package CP via aguide roller 42, a function of applying slackening to the core yarn C, and a function of feeding the yarn end of the core yarn C. The coreyarn guiding section 43 is a tubular member adapted to guide the core yarn C to thedraft device 6. A travelling region of the core yarn C is formed inside the coreyarn guiding section 43 so as to include a straight line. In the following description, in the travelling path of the core yarn C in the coreyarn supplying unit 50, a side on which the core yarn C is supplied from the core yarn package CP to the coreyarn supplying unit 50 is referred to as upstream, and a side on which the core yarn C is supplied from the coreyarn supplying unit 50 to thedraft device 6 is referred to as downstream. - As illustrated in
FIG. 3 , the coreyarn supplying unit 50 includes aunit base 51, atension applying section 60, aslack applying section 70, a coreyarn monitoring section 81, and a coreyarn feeding section 90. Acore yarn guide 55 is arranged most upstream of theunit base 51. Theunit base 51 supports thetension applying section 60, theslack applying section 70, the coreyarn monitoring section 81, and the coreyarn feeding section 90. Between thecore yarn guide 55 and theslack applying section 70, thetension applying section 60 applies a tension to the core yarn C to be supplied to thedraft device 6. Theslack applying section 70 applies slack to the core yarn C between thetension applying section 60 and the coreyarn monitoring section 81. The coreyarn monitoring section 81 detects a presence and/or an absence of the core yarn C between theslack applying section 70 and the coreyarn feeding section 90. The coreyarn feeding section 90 feeds the yarn end of the core yarn C to thedraft device 6 through the coreyarn guiding section 43 at downstream of the coreyarn monitoring section 81. Note that, a description "feeding the yarn end of the core yarn C" refers to an operation in which the coreyarn feeding section 90 feeds the yarn end of the core yarn C to themain body unit 30. A description "supply the core yarn C" refers to an operation in which the coreyarn supplying device 40 continuously supplies the core yarn C to the main body unit 30 (i.e., the operation when spinning is carried out). - As illustrated in
FIG. 4 , the coreyarn supplying unit 50 further includes a supporting member (supporting section) 52, a first holding member (holding section) 53, and a second holding member (holding section) 54. The supportingmember 52 swingably supports theunit base 51 with respect to thedraft device 6. More specifically, the supportingmember 52 is detachably attached to adraft base 29 of thedraft device 6. Adistal end portion 52a of the supportingmember 52 is rotatably attached to one end of aswing shaft 51a arranged on theunit base 51. That is, one end of the supportingmember 52 is supported by theswing shaft 51a. Thedraft base 29 is a base shared between thedraft devices 6 of the pair ofadjacent spinning units 2, and supports eachroller pair roller pair draft device 6. Thedraft base 29 is provided with afirst hole 29a, abent portion 29b, and a plurality ofsecond holes 29c. The plurality ofsecond holes 29c are formed between thefirst hole 29a and thebent portion 29b. - The first holding
member 53 holds theunit base 51 at a core yarn supplying position. More specifically, the first holdingmember 53 is fixed to theunit base 51. The first holdingmember 53 holds theunit base 51 at the core yarn supplying position by engaging adistal end portion 53a of the first holdingmember 53 to thefirst hole 29a. Note that the core yarn supplying position is a position where theunit base 51 is arranged when the coreyarn supplying unit 50 supplies the core yarn C to thedraft device 6. - As illustrated in
FIG. 5 , the second holdingmember 54 holds theunit base 51 at one of a plurality of retreated positions. More specifically, the second holdingmember 54 is swingably supported by a supportingshaft 51b arranged on theunit base 51. The second holdingmember 54 holds theunit base 51 at the retreated position by engaging adistal end portion 54a of the second holdingmember 54 to thebent portion 29b. Furthermore, the second holdingmember 54 holds theunit base 51 at one of other plurality of retreated positions by engaging thedistal end portion 54a to one of the plurality ofsecond holes 29c. Note that the retreated position is a position where theunit base 51 is arranged when the coreyarn supplying unit 50 is not supplying the core yarn C to themain body unit 30, and is the position where the coreyarn feeding section 90 is located away from thedraft device 6 than when theunit base 51 is held at the core yarn supplying position. - As illustrated in
FIGS. 6A and 6B , thetension applying section 60 includes atension applying mechanism 61 and anoperating mechanism 62. As illustrated inFIG. 6A , thetension applying mechanism 61 applies a tension to the core yarn C by guiding the core yarn C in a zigzag manner by a fixedpiece 63 and amovable piece 64. The fixedpiece 63 is fixed to theunit base 51. A plurality ofshafts 63a, on which the core yarn C is to be hooked, is arranged on the fixedpiece 63. - The
movable piece 64 is supported to be openable/closable with respect to the fixedpiece 63 by a supporting shaft (not illustrated) arranged on the fixedpiece 63. Themovable piece 64 is urged in an opening direction with respect to the fixedpiece 63 by a spring (not illustrated) arranged on the fixedpiece 63. Themovable piece 64 includes aplurality protrusions 64a so as to project out with respect to the plurality ofshafts 63a. As illustrated inFIG. 6B , eachprotrusion 64a is arranged on themovable piece 64 such that eachprotrusion 64a is alternately located with eachshaft 63a under a state where themovable piece 64 is closed with respect to the fixedpiece 63. Ahole 64b, through which the core yarn C is inserted, is formed at a distal end portion of eachprotrusion 64a. - As illustrated in
FIG. 6A , a first tension is applied to the core yarn C under a state where the core yarn C is passed through the fixedpiece 63 and themovable piece 64, and themovable piece 64 is opened with respect to the fixedpiece 63. A state of thetension applying mechanism 61 in this case is referred to as a tension applying state. As illustrated inFIG. 6B , a second tension smaller than the first tension is applied to the core yarn C under a state where the core yarn C is passed through the fixedpiece 63 and themovable piece 64, and themovable piece 64 is closed with respect to the fixedpiece 63. A state of thetension applying mechanism 61 in this case is referred to as a tension non-applying state. The second tension also includes a case in which the tension applied to the core yarn C is zero. - As illustrated in
FIG. 6A , theoperating mechanism 62 includes anoperation member 65 and anair cylinder 66. Theoperation member 65 is arranged such that adistal end portion 65a of theoperation member 65 makes contact with themovable piece 64 from a side opposite to the fixedpiece 63. Themovable piece 64 urged in the opening direction with respect to the fixedpiece 63 is opened/closed with respect to the fixedpiece 63 when theoperation member 65 is moved by theair cylinder 66. Thus, theoperating mechanism 62 changes thetension applying mechanism 61 to the tension applying state and the tension non-applying state. - As illustrated in
FIG. 3 , theslack applying section 70 includes anarm 71 and anair cylinder 72. Thearm 71 is swingably supported by a supportingshaft 51c arranged on theunit base 51. Ahole 73, through which the core yarn C is inserted, is formed at a distal end portion of thearm 71. Thehole 73 includes anedge 73a of a closed annular shape (circular shape in the present embodiment) . A material excellent in wear resistance such as ceramic, for example, is used for theedge 73a. Thearm 71 is swung to a normal position and a standby position by theair cylinder 72. The normal position is a position where thehole 73 is located on the travelling path of the core yarn C (position of solid line inFIG. 3 ). The standby position is a position where thehole 73 is located away from the travelling path of the core yarn C to the side opposite to the unit base 51 (position of chain double dashed line inFIG. 3 ). - The core
yarn monitoring section 81 detects the presence and/or the absence of the core yarn C between theslack applying section 70 and the coreyarn feeding section 90. Acore yarn guide 56 adapted to guide the core yarn C is arranged upstream of the coreyarn monitoring section 81. Acore yarn guide 57 adapted to guide the core yarn C is arranged downstream of the coreyarn monitoring section 81. - As illustrated in
FIG. 7 , the coreyarn feeding section 90 includes anair sucker 91 and aclamp cutter 92. A travelling region of the core yarn C is formed inside the coreyarn feeding section 90 so as to include a straight line. Theair sucker 91 includes a core yarn feedingnozzle block 93, a coreyarn feeding nozzle 94, and atube body 95. The coreyarn feeding nozzle 94, which becomes a part of the travelling path of the core yarn C, is arranged inside the core yarn feedingnozzle block 93. Thetube body 95, which becomes a part of the travelling path of the core yarn C, is arranged downstream of the coreyarn feeding nozzle 94. A compressed air is supplied from outside to the travelling path of the core yarn C. The coreyarn feeding section 90 feeds the core yarn C to the coreyarn guiding section 43 by action of the compressed air. - The
clamp cutter 92 includes aclamp member 96, acutter 97, and anair cylinder 98. Theclamp member 96 is operated by theair cylinder 98 to clamp the core yarn C at the downstream of theair sucker 91. Thecutter 97 is operated by theair cylinder 98 to cut the core yarn C at downstream of theclamp member 96. Theclamp cutter 92 is set such that a timing to cut the core yarn C is after a timing to clamp the core yarn C. - As illustrated in
FIG. 8 , the coreyarn supplying unit 50 is arranged outside a work region R for setting the sliver (the fiber bundle) S to thedraft device 6. The work region R is a region on a back side (upstream) of thedraft device 6, and is the region for inserting the sliver S to atubular guiding member 6a arranged in thedraft device 6. Under a state where the coreyarn supplying unit 50 is located at the core yarn supplying position, the coreyarn feeding section 90 and the coreyarn guiding section 43 are arranged such that the respective travelling regions of the core yarn C include the same straight line L. An angle θ formed by the straight line L and the travelling path of the fiber bundle F in thedraft device 6 is 10 degrees to 70 degrees (preferably, 30 degrees to 50 degrees), when seen from a direction perpendicular to both a rotation center line of each roller constituting eachroller pair draft device 6. That is, the travelling path of the core yarn C in the coreyarn feeding section 90 and the coreyarn guiding section 43 merges with the travelling path of the fiber bundle F between themiddle roller pair 18 and thefront roller pair 19 from a direction inclined by 10 degrees to 70 degrees (preferably, 30 degrees to 50 degrees) with respect to the travelling path of the fiber bundle F in thedraft device 6. - As illustrated in
FIG. 3 , the coreyarn supplying unit 50 further includes a firstair supply tube 82, a secondair supply tube 83, a relay substrate (substrate, board, circuit board) 84, and amulti-core cable 85. The firstair supply tube 82 is pulled out to an outside of theunit base 51, and is removably connected to an air supply tube (not illustrated) of themain body unit 30. The firstair supply tube 82 is connected to each of theair cylinder 66 of thetension applying section 60, theair cylinder 72 of theslack applying section 70, and theair cylinder 98 of theclamp cutter 92 via a plurality of pipes (not illustrated) arranged in theunit base 51. The compressed air is thereby supplied from the air supply source of theblower box 4 to each of theair cylinders main body unit 30. - The second
air supply tube 83 is pulled out to the outside of theunit base 51, and is removably connected to the air supply tube of themain body unit 30. The secondair supply tube 83 is connected to theair sucker 91 via a pipe (not illustrated) arranged in theunit base 51. The compressed air is thereby supplied from the air supply source of theblower box 4 to theair sucker 91 through the air supply tube of themain body unit 30. - The relay substrate 84 is supported by the
unit base 51. The relay substrate 84 is electrically connected to each of an electromagnetic valve for operation of theair sucker 91 of the coreyarn feeding section 90, an electromagnetic valve for operation of theair cylinder 66 of thetension applying section 60, an electromagnetic valve for operation of theair cylinder 72 of theslack applying section 70, an electromagnetic valve for operation of theair cylinder 98 of theclamp cutter 92, and the coreyarn monitoring section 81 via a plurality of wires (cables) (not illustrated) arranged in theunit base 51. - The
multi-core cable 85 is pulled out to the outside of theunit base 51, and is removably connected to a multi-core cable (not illustrated) of themain body unit 30 via a connector (not illustrated), for example. Themulti-core cable 85 is a cable in which a plurality of wires are bundled to input/output electric signals to each section of the coreyarn supplying unit 50, and is connected to the relay substrate 84. Each section of the coreyarn supplying unit 50 is thus controlled by theunit control device 10 of themain body unit 30. - When the core yarn C is supplied to the
main body unit 30 and the spun yarn Y is produced from the sliver S and the core yarn C (i.e., when the spinning is carried out), the coreyarn supplying unit 50 is located at the core yarn supplying position and thetension applying section 60 causes thetension applying mechanism 61 to be in the tension applying state to apply the first tension to the core yarn C, as illustrated inFIG. 4 . In this case, thearm 71 of theslack applying section 70 is located at the normal position (i.e., the position where thehole 73 is located on the travelling path of the core yarn C). Thus, the coreyarn supplying unit 50 supplies the core yarn C to thedraft device 6 while applying the first tension to the core yarn C unwound from the core yarn package CP. - When the yarn defect is detected by the spun
yarn monitoring device 8 and the spinning is interrupted (or when the spinning is terminated), theclamp cutter 92 is operated to clamp and cut the core yarn C, as illustrated inFIG. 9 . The yarn end of the core yarn C pulled out from the core yarn package CP is thereby clamped by theclamp cutter 92. Thereafter, thearm 71 of theslack applying section 70 is swung to the standby position, the core yarn C inserted through thehole 73 is pulled up, and the core yarn C is unwound from the core yarn package CP by an amount in which the core yarn C is pulled up. - When the spinning is resumed, the
clamp cutter 92 is operated to release the clamping of the yarn end of the core yarn C, as illustrated inFIG. 10 . Thearm 71 of theslack applying section 70 is then swung to the normal position. Thetension applying section 60 changes thetension applying mechanism 61 to the tension non-applying state, so that thetension applying mechanism 61 applies the second tension smaller than the first tension to the core yarn C. Theair sucker 91 is operated under this state. The yarn end of the core yarn C is thereby fed out to thedraft device 6 through the coreyarn guiding section 43. As described above, in thetension applying section 60, thetension applying mechanism 61 is in the tension non-applying state when the coreyarn feeding section 90 feeds out the yarn end of the core yarn C to the draft device 6 (i.e., when the supplying of the core yarn C to thepneumatic spinning device 7 is started). - After the spinning is resumed, the state returns to the state illustrated in
FIG. 4 . That is, theclamp cutter 92 and theair sucker 91 are not operated, and thetension applying section 60 causes thetension applying mechanism 61 to be under the tension applying state to apply the first tension to the core yarn C. When interrupting the spinning and carrying out simple cleaning, the coreyarn supplying unit 50 is to be held at the retreated position using the second holdingmember 54, as illustrated inFIG. 5 , without detaching the coreyarn supplying unit 50. When resuming the spinning after the cleaning, the holding by the second holdingmember 54 is released and the coreyarn supplying unit 50 is set to the core yarn supplying position using the first holdingmember 53. - In the core
yarn supplying unit 50, the tension to be applied to the core yarn C can be changed by changing thetension applying mechanism 61 to the tension applying state and the tension non-applying state. Thus, since the tension to be applied to the core yarn C by thetension applying section 60 can be reduced while applying the slack to the core yarn C by theslack applying section 70, the yarn end of the core yarn C can be reliably fed out to themain body unit 30 by the coreyarn feeding section 90. - In the core
yarn supplying unit 50, thetension applying mechanism 61 is provided under the tension non-applying state when the coreyarn feeding section 90 feeds out the yarn end of the core yarn C to themain body unit 30. Thus, since the tension applied to the core yarn C is small when the yarn end of the core yarn C is fed out, the yarn end of the core yarn C can be reliably fed out to themain body unit 30. - In the core
yarn supplying unit 50, theslack applying section 70 includes thehole 73 through which the core yarn C is inserted, thehole 73 having theclosed edge 73a. The core yarn C thus does not fall out from thehole 73, and the slack is reliably applied to the core yarn C. The yarn end of the core yarn C thus can be reliably fed out to themain body unit 30. - In the core
yarn supplying unit 50, theedge 73a is circular. The core yarn C thus can be smoothly guided by thehole 73 of theslack applying section 70, and the yarn end of the core yarn C can be reliably fed out to themain body unit 30. - In the core
yarn supplying device 40, the yarn end of the core yarn C unwound from the core yarn package CP can be reliably fed out to themain body unit 30. - The core
yarn supplying device 40 further includes the tubular coreyarn guiding section 43 adapted to guide the core yarn C to themain body unit 30, and the travelling region of the core yarn C is formed inside the coreyarn guiding section 43 so as to include a straight line. The yarn end of the core yarn C thus can smoothly travel inside the coreyarn guiding section 43, and the yarn end of the core yarn C can be reliably fed out to themain body unit 30. Furthermore, since a pressure loss of air inside the coreyarn guiding section 43 is suppressed, the core yarn C can be reliably fed out to themain body unit 30. Moreover, the cleaning can be easily carried out even if oil solution used for spinning is accumulated in the coreyarn feeding section 90 and/or the coreyarn guiding section 43. - According to the spinning
machine 1, since the tension applied to the core yarn C is small when the supplying of the core yarn C to thepneumatic spinning device 7 is started, the yarn end of the core yarn C can be reliably fed out to themain body unit 30. - In the core yarn supplying method implemented by the spinning
machine 1, the first tension is applied to the core yarn C when supplying the core yarn C to themain body unit 30, and the second tension smaller than the first tension is applied to the core yarn C when feeding out the yarn end of the core yarn C to themain body unit 30. - In the core yarn supplying method, since the tension of the core yarn C is small when feeding out the yarn end of the core yarn C to the
main body unit 30, the yarn end of the core yarn C can be reliably fed out to themain body unit 30. - One embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. The
operating mechanism 62 is not limited to the configuration described above, and various configurations can be applied. For example, a cam coupled with a motor may be used without using theoperation member 65 and theair cylinder 66. - The shape of the
edge 73a of theslack applying section 70 is not limited to a circular shape, and may be a polygonal shape, for example. Furthermore, theedge 73a is not limited to an annular shape, and may be a C-shape, for example. The material of theedge 73a is not limited to ceramic, and may be metal. - The type of core yarn C may be other than the mono-filament yarn or the false-twisted yarn. For example, the core yarn C may be a multi-filament yarn having lower rigidity than the mono-filament yarn, or may be a yarn having lower crimping property than the false-twisted yarn. Furthermore, the core yarn C may be a textured yarn, an air textured yarn (e.g., yarn in which spandex and textured yarn are interlaced, yarn having similar crimping property as the textured yarn), or a spun yarn (generally-used spun yarn).
- The
unit control device 10 and themachine control device 20 merely need to be control devices that directly or indirectly control at least each section of the coreyarn supplying unit 50, and arranging positions and the like are not limited. Theunit control device 10 may be arranged, not for eachspinning unit 2, but for each group of the plurality of spinningunits 2. - The material and the shape of each structure of the spinning
machine 1 are not limited to the material and the shape described above, and various materials and shapes can be applied. - In the spinning
machine 1, each device is arranged such that the spun yarn Y supplied from the upper side is wound on the lower side, but each device may be arranged such that the yarn supplied from the lower side is wound on the upper side. Furthermore, in the spinningmachine 1, each roller pair of thedraft device 6 and the traverse mechanism of thetraverse device 23 are driven by the power from the motor box 5 (i.e., commonly driven for the plurality of spinning units 2). However, each section of the spinning unit 2 (e. g. , thedraft device 6, thepneumatic spinning device 7, the windingdevice 12, or the like) may be independently driven for eachspinning unit 2. - The
pneumatic spinning device 7 may further include a needle held by the fiber core yarn guide and arranged to project out into a spinning chamber to prevent the twists of the fiber bundle F from being transmitted to the upstream of thepneumatic spinning device 7. In place of the needle, thepneumatic spinning device 7 may prevent the twists of the fiber bundle F from being propagated towards the upstream of thepneumatic spinning device 7 by a downstream end of the fiber core yarn guide. Moreover, thepneumatic spinning device 7 may include a pair of air jet nozzles adapted to apply twists in opposite directions from each other. - In the travelling direction of the spun yarn Y, the
tension sensor 9 may be arranged upstream of the spunyarn monitoring device 8. In the spinningmachine 1, theyarn storage device 14 has a function of pulling out the spun yarn Y from thepneumatic spinning device 7, but the spun yarn Y may be pulled out by a delivery roller and a nip roller. The waxingdevice 11, thetension sensor 9, and the spunyarn monitoring device 8 may not be arranged in thespinning unit 2. - Instead of being driven by a driving motor arranged for each
spinning unit 2, the windingdevice 12 may be driven by a common driving source for the plurality of spinningunits 2. In this case, when reversely rotating the package P, thecradle arm 21 is moved by an air cylinder (not illustrated) such that the package P moves away from the windingdrum 22, and the package P is reversely rotated by a reverse rotation roller (not illustrated) arranged in theyarn joining cart 3.
Claims (11)
- A core yarn supplying unit (50) comprising:a core yarn feeding section (90) arranged to feed out a yarn end of a core yarn (C);a tension applying section (60) adapted to apply a tension to the core yarn (C); anda slack applying section (70) adapted to apply slack to the core yarn (C) between the core yarn feeding section (90) and the tension applying section (60),wherein the tension applying section (60) includes:a tension applying mechanism (61) adapted to apply the tension to the core yarn (C), characterized byan operating mechanism (62) adapted to change the tension applying mechanism (61) to a tension applying state and a tension non-applying state.
- The core yarn supplying unit (50) according to claim 1, wherein the slack applying section (70) includes a hole (73) through which the core yarn (C) is inserted, the hole (73) having a closed edge (73a).
- The core yarn supplying unit (50) according to claim 2, wherein the edge (73a) is circular.
- A core yarn supplying device (40) comprising:the core yarn supplying unit (50) according to any one of claim 1 through claim 3; anda core yarn package holding section (41) adapted to hold a core yarn package (CP).
- The core yarn supplying device (40) according to claim 4, further comprising a tubular core yarn guiding section (43) adapted to guide the core yarn (C) fed out from the core yarn supplying unit (50),
wherein a travelling region of the core yarn (C) is formed inside the core yarn guiding section (43) so as to include a straight line (L). - A spinning machine (1) comprising:the core yarn supplying unit (50) according to any one of claim 1 through claim 3; a draft device (6) adapted to draft a fiber bundle (F);a pneumatic spinning device (7) adapted to produce a spun yarn (Y) by applying twists to the fiber bundle (F) with the core yarn (C) as a core; anda winding device (12) adapted to wind the spun yarn (Y) into a package (P).
- A core yarn supplying method for supplying a core yarn (C) from a core yarn package (CP) while applying a tension to the unwound core yarn (C), the method comprising the steps of: applying a first tension to the core yarn (C) when supplying the core yarn (C); characterized by applying slack to the core yarn (C) when feeding out a yarn end of the core yarn (C).
- The method of claim 7, comprising the step of operating a tension applying section (60) for applying the second tension to the core yarn (C) during the feeding out of the yarn end of the core yarn (C) and the step of operating said tension applying section (60) for applying the first tension to the core yearn (C) during the subsequent
- The method of claim 7 or 8, comprising, for preparing the feeding out of the yarn end of the core yarn (C), the step of operating a clamp member (96) for clamping the yarn end and the step of operating a slack applying section (70) for pulling out the core yearn (C) from the core yarn package (CP).
- The method of claim 9, further comprising, for allowing the feeding out of the yarn end of the core yarn (C), the step of operating said clamp member (96) for releasing the yarn end and the step of operating said slack applying section (70) for releasing the pulled out core yarn (C).
- The method of claim 10, wherein said tension applying section (60) is operated to apply the first tension during the pulling out of the core yarn (C) from the core yarn package (CP).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014122198A JP2016003401A (en) | 2014-06-13 | 2014-06-13 | Core yarn feeding unit, core yarn feeding device, spinning machine and core yarn feeding method |
Publications (2)
Publication Number | Publication Date |
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EP2993150A1 EP2993150A1 (en) | 2016-03-09 |
EP2993150B1 true EP2993150B1 (en) | 2017-12-06 |
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Application Number | Title | Priority Date | Filing Date |
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EP15162349.3A Not-in-force EP2993150B1 (en) | 2014-06-13 | 2015-04-02 | Core yarn supplying unit, core yarn supplying device, spinning machine, and core yarn supplying method |
Country Status (3)
Country | Link |
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EP (1) | EP2993150B1 (en) |
JP (1) | JP2016003401A (en) |
CN (1) | CN105274664B (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2021025141A (en) * | 2019-08-01 | 2021-02-22 | 村田機械株式会社 | Spinning machine |
EP3828325A1 (en) * | 2019-11-29 | 2021-06-02 | Saurer Intelligent Technology AG | Spinning station and air spinning station comprising such a spinning station and process to determin a yarn strength defect |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4114356A (en) * | 1976-08-05 | 1978-09-19 | Zinser Textilmaschinen Gmbh | Open-end spinning apparatus |
IT1218170B (en) * | 1986-10-11 | 1990-04-12 | Murata Machinery Ltd | PROCEDURE FOR WINDING WIRE IN AUTOMATIC WINDING MACHINE AND RELATED CONTROL DEVICE |
JP4062869B2 (en) * | 2000-09-01 | 2008-03-19 | 村田機械株式会社 | Core yarn manufacturing apparatus and core yarn manufacturing method |
JP2008156796A (en) * | 2006-12-26 | 2008-07-10 | Murata Mach Ltd | Core yarn tension controller in core yarn spinning apparatus |
JP2012131591A (en) | 2010-12-20 | 2012-07-12 | Murata Machinery Ltd | Device for feeding core yarn and spinning machine including the device for feeding core yarn |
-
2014
- 2014-06-13 JP JP2014122198A patent/JP2016003401A/en active Pending
-
2015
- 2015-04-02 EP EP15162349.3A patent/EP2993150B1/en not_active Not-in-force
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CN105274664A (en) | 2016-01-27 |
EP2993150A1 (en) | 2016-03-09 |
CN105274664B (en) | 2019-09-24 |
JP2016003401A (en) | 2016-01-12 |
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