EP1956127B1 - Adenwechseleinrichtung für eine strickmaschine oder dergleichen - Google Patents

Adenwechseleinrichtung für eine strickmaschine oder dergleichen Download PDF

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Publication number
EP1956127B1
EP1956127B1 EP06810616.0A EP06810616A EP1956127B1 EP 1956127 B1 EP1956127 B1 EP 1956127B1 EP 06810616 A EP06810616 A EP 06810616A EP 1956127 B1 EP1956127 B1 EP 1956127B1
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EP
European Patent Office
Prior art keywords
yarn
yarns
piecing
choice
knitted
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.)
Active
Application number
EP06810616.0A
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English (en)
French (fr)
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EP1956127A4 (de
EP1956127A1 (de
Inventor
Yasunori Hatakeyama
Kenji Nakai
Katsuji Minakata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shima Seiki Mfg Ltd
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Shima Seiki Mfg Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Shima Seiki Mfg Ltd filed Critical Shima Seiki Mfg Ltd
Publication of EP1956127A1 publication Critical patent/EP1956127A1/de
Publication of EP1956127A4 publication Critical patent/EP1956127A4/de
Application granted granted Critical
Publication of EP1956127B1 publication Critical patent/EP1956127B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/54—Thread guides
    • D04B15/56—Thread guides for flat-bed knitting machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
    • B65H69/06—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing
    • B65H69/061—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing using pneumatic means
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/10—Patterned fabrics or articles
    • D04B1/12—Patterned fabrics or articles characterised by thread material
    • D04B1/126—Patterned fabrics or articles characterised by thread material with colour pattern, e.g. intarsia fabrics
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/54—Thread guides
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/10—Devices for supplying, feeding, or guiding threads to needles
    • 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

  • This invention relates to devices for supplying knitting yarns to yarn feeding devices in knitting machines or suchlike, and particularly to a yarn changing device in a knitting machine or suchlike, which sequentially selects any of plural types of yarns different in color or suchlike, and performs yarn piecing upon each supply to a yarn feeding device in the knitting machine.
  • a yarn selecting device and a yarn piecing device are provided between plural types of yarn supply packages different in color or suchlike and the knitting machine, a choice yarn selected by the yarn selecting device is automatically pieced with a knitted yarn currently being knitted, thereby achieving knitting of desired colors/patterns.
  • Such equipment has no effective yarn changing device for holding ends of yarns from the plural types of packages, and releasing and introducing only one selected choice yarn into the yarn piecing device, thereby piecing it with the knitted yarn being knitted.
  • EP 1 584 595 A1 claiming priority from JP 2005-25124 is directed to a yarn joining device according to the preamble of claim 1 comprising suctioning means for collectively suctioning and holding a plurality of yarns and clamping means for collectively clamping the yarns between the suctioning means and yarn supply packages.
  • the clamping means including first and second clampers disposed in two places along a yarn path and which are activated selectively. When a knitting yarn needs splicing, its two loose ends are clutched by the suctioning device. After splicing the first and second clampers are activated such that the length of the joint portion is reduced. The joint portion of the yarns is formed uniformly and reliably.
  • the invention provides a yarn changing device in a knitting machine or suchlike, as described above, in which holding means for holding a plurality of yarn ends from plural types of packages is released such that only one predetermined choice yarn is selected, pieced with a knitted yarn being knitted, and successively fed to the knitting machine.
  • An objective of the invention is to provide a yarn changing device capable of reliably changing a selected yarn and a yarn being knitted, and reliably holding yarns other than the yarn used for knitting with the holding means.
  • the invention to achieve the above objective resides in a yarn changing device in a knitting machine or suchlike for selecting a yarn between plural types of yarn supply packages different in color or suchlike and a yarn feeding device in the knitting machine, and feeding the selected choice yarn to the yarn feeding device in the knitting machine after piecing the choice yarn with a knitted yarn being knitted,
  • the yarn changing device comprising: suctioning means for collectively suctioning and holding a plurality of yarns; and clamping means for collectively clamping the yarns between the suctioning means and the yarn supply packages, the clamping means including first and second clampers disposed in two places along a yarn path and activated selectively.
  • the second clamper of the clamping means includes a yarn holding member, which normally has the yarns collectively clamped but releases the clamp when the choice yarn is selected, whereas the first clamper includes a yarn clutching member, which normally releases the clamp but clutches the yarns before the yarn holding member is released when the choice yarn is selected, and stops clutching after the start of yarn holding.
  • the subject matter recited in claim 2 based on the invention is directed to the yarn changing device in a knitting machine or suchlike according to claim 1, in which the first clamper of the clampingmeans is operated in conjunction with the suctioning means so as to collectively clamp a plurality of yarns in the yarn path during a suctioning operation of the suctioning means.
  • the yarn changing device in a knitting machine or suchlike that constitutes the invention includes the suctioning means for collectively suctioning and holding a plurality of yarns, and the clamping means for collectively clamping the yarns between the yarn supply packages and the suctioning means, the clamping means including the first and second clampers disposed in two places along the yarn path and activated selectively, and therefore it is possible to release the holding means for holding a plurality of yarn ends from plural types of packages, such that only one predetermined choice yarn is selected, pieced with a knitted yarn being knitted, and successively fed to the knitting machine, thereby making it possible to reliably clamp the yarns regardless of the tension on the yarns.
  • the yarn changing device in a knitting machine or suchlike that constitutes the invention will be described in detail with respect to a concrete embodiment illustrated in the drawings.
  • the yarn changing device is incorporated in a flat-knitting machine as shown in FIG. 1 .
  • FIG. 1 is a schematic side view illustrating the flat-knitting machine having the yarn changing device according to the invention mounted therein.
  • the flat-knitting machine shown in the figure includes a machine frame 40, and a yarn feeding device 41 incorporated in the machine frame 40 with which a yarn selecting device 1 and a yarn piecing device 2 are combined.
  • the machine frame 40 has, for example, eight knitting yarn packages W1 to W8 provided in its vicinity. These knitting yarn packages W1 to W8 are respectively composed of knitting yarns Y1 to Y8 of different colors.
  • the machine frame 40 includes a needle bed 42 in which a plurality of knitting needles are retractably provided in a row.
  • the machine frame 40 further includes a carrier 43 and a carriage 44, which are capable of moving back and forth, and as the carriage 44 moves, the knitting needles of the needle bed 42 are retractably operated, and the carrier 43 also moves.
  • the eight types of knitting yarns Y1 to Y8 wound on the knitting yarn packages W1 to W8, respectively, are supplied to the yarn selecting device 1, one of which is selected by the yarn selecting device 1 (hereinafter, referred to as a "choice yarn”), and fed to the carrier 43 by the yarn feeding device 41 after being pieced with a knitting yarn being knitted by the yarn piecing device 2 (hereinafter, referred to as a "knitted yarn”), and thereafter it is grasped by the carrier 43, and moved back and forth to be supplied to the needle bed 42, so that a fabric 45 is knitted.
  • the knitting yarns Y1 to Y8 are supplied to the yarn selecting device 1 via a tension-applying top spring 46. Then, the yarn selecting device 1 and the yarn piecing device 2 change the color of the knitting yarn, Y1 to Y8, that is being knitted in accordance with the pattern of the fabric 45 to be knitted.
  • the yarn changing device in a knitting machine or suchlike that constitutes the invention essentially consists of: the yarn selecting device 1 for selecting a yarn between the plural types of yarn supply packages W1 to W8 different in color or suchlike and the yarn feeding device 41 in the knitting machine; and the yarn piecing device 2 for piecing the choice yarn selected by the yarn selecting device 1 with the knitted yarn being knitted.
  • the yarn changing device includes suctioning means 28 for collectively suctioning and holding a plurality of yarns, and clamping means 29 for collectively clamping the yarns between the suctioning means 28 and the yarn supply packages W1 to W8, the clamping means 29 consisting of a first clamper 29A and a second clamper 29B disposed in two places along the yarn path and activated selectively.
  • the first clamper 29A of the clamping means 29 is configured to operate in conjunction with the suctioning means 28, and collectively clamp the yarns in the yarn path during the suctioning operation of the suctioning means 28.
  • the second clamper 29B of the clamping means 29 includes a yarn holding member 31, which normally has the yarns collectively clamped but releases the clamp when the choice yarn is selected, whereas the first clamper includes a yarn clutching member 30, which normally releases the clamp but clutches the yarns before the yarn holding member 31 is released when the choice yarn is selected, and stops clutching after the start of yarn holding.
  • FIG. 2 is a schematic perspective view illustrating the yarn selecting device 1, the yarn piecing device 2, etc., in magnification.
  • the yarn selecting device 1 has eight yarn selection plates G1 to G8 in its upper portion.
  • Each of the yarn selection plates G1 to G8 includes a yarn passing ring "g" in its lower portion.
  • the knitting yarns Y1 to Y8 from the knitting yarn packages W1 to W8 pass their respective yarn passing rings "g" of the yarn selection plates G1 to G8, and one of the yarns, the knittedyarn, is fed to the yarn feeding device 41.
  • Theyarnpassing rings "g" are each provided in the form of a loop such that the knitting yarns Y1 to Y8 pass through their respective loops.
  • one of the yarn selection plates G1 to G8 that holds a knitting yarn selected for the change is moved inwardly as indicated by the double-dashed chain line inFIG. 2, thereby setting the knitting yarn in a selecting position.
  • the yarn selecting device 1 includes a separator 12 for separately placing the knitted yarn and other knitting yarns. Furthermore, the yarn selecting device 1 includes a yarn guiding lever 10 for guiding the knitting yarn in the selecting position to a yarn piecing position.
  • FIG. 3 is a schematic perspective view illustrating the details of a substantial portion of the yarn selecting device 1
  • FIG. 4 is a schematic perspective view illustrating the details of a substantial portion of the yarn piecing device 2.
  • the yarn selecting device 1 has the yarn clutching member 30, the yarn holding member 31, and a yarn end grasping suctioner 32 provided in the vicinity of the separator 12, as shown in FIGS. 2 and 3 .
  • the yarn clutching member 30 is configured to be retractably operated by a yarn clutching cylinder 33, as shown in FIGS. 2 and 3 , and it is normally retracted to open the yarn path between the separator 12 and an operating end 33a of the yarn clutching cylinder 33, but when extended, it collectively clamps the yarns between the separator 12 and the operating end 33a of the yarn clutching cylinder 33.
  • the yarn holding member 31 is configured to be retractably operated by a yarn holding cylinder 34 , and it is normally extended to collectively clamp the yarns between the separator 12 and an operating end 34a of the yarn holding cylinder 34, but when retracted for yarn changing, it opens the yarn path between the separator 12 and the operating end 34a of the yarn holding cylinder 34.
  • the yarn selecting device 1 has the yarn piecing device 2 combined with its lower portion.
  • the yarn piecing device 2 is of a splicer type piecing yarns by blowing a jet of compressed air to the yarns, and is configured to piece two knitting yarns with their end portions arranged to point in the same direction, as shown in FIGS. 2 and 4 .
  • the yarn piecing device 2 includes a piecing nozzle 21.
  • the piecing nozzle 21 includes a yarn piecing chamber 21a for accommodating two yarns to be pieced with their endportions arranged to point in the same direction.
  • the piecing nozzle 21 includes air jetting means 26 with a nozzle opening 21b for jetting out a stream of compressed air or suchlike from a direction perpendicular to the yarn piecing chamber 21a, and the air jetting means 26 includes a magnetic valve 27 to be controlled to open/close, thereby controlling the air jet.
  • the yarn piecing device 2 includes, for example, a disk guide 20 for guiding two knitting yarns to the yarn piecing position, a cutter 23 for adjusting the length of each knitting yarn, and the piecing nozzle 21 for piecing the yarns after untwisting them.
  • the yarn piecing device 2 is configured to be driven by a drive motor 50.
  • the yarn piecing device 2 has a yarn positioning portion 35 provided in its lower portion for positioning and delivering the knitted yarn to the yarn feeding device 41.
  • the yarn positioning portion 35 has a slit-like notch by which to seize the knitting yarn for positioning.
  • FIG. 5 is a diagram illustrating the yarn guiding lever, in which A of FIG. 5 is a schematic front view thereof, B of FIG. 5 is a schematic right side view seen from the right side in A of FIG. 5, and C of FIG. 5 isacross-sectionalviewtakenalongline I-I in B of FIG. 5 .
  • the yarn guiding lever 10 has a main body 105 generally provided in the form of an arc, as shown in A of FIG. 5 .
  • the yarn guiding lever 10 has a first catching portion 101 provided at one end for catching the choice yarn.
  • the first catching portion 101 is configured in the form of a V-shaped notch, as shown in B of FIG. 5 .
  • the yarn guiding lever 10 has a rotational axis 107 provided at the other end, so that it can rotate about the rotational axis 107 in arrow directions II. Furthermore, the yarn guiding lever 10 includes a second catching portion 102 provided roughly at its center for catching the knitted yarn.
  • the second catching portion 102 projects from the main body 105, as shown in B of FIG. 5 .
  • the main body 105 has a pair of walls 106 and 106' provided on its opposite sides, as shown in C of FIG. 5 , so that the parts 105, 106, and 106' form a U-shaped yarn regulating portion 103.
  • the yarn regulating portion 103 is formed in the shape of U opening outwardly, generally all over the outer circumference of the yarn guiding lever 10.
  • FIGS. 6 to 9 are diagrams for describing operations of the yarn selecting device, etc. , the yarn selecting device is operated in the first through eighth stages according to the procedure shown in A and B of FIG. 6 , A and B of FIG. 7 , A and B of FIG. 8, and A and B of FIG. 9 , and in each figure, A-1 and B-1 are schematic front views, while A-2 and B-2 are schematic left side views corresponding to A-1 and B-1, respectively.
  • FIG. 10 is a diagram for describing the operational procedure of the yarn piecing device.
  • FIG. 11 is a perspective view illustrating a portion of the device, including the disk guide.
  • the eight knitting yarns Y1 to Y8 are respectively held by the eight yarn selection plates G1 to G8 during the first stage, as shown in A-1 and A-2 of FIG. 6 .
  • the knitted yarn Y4 (indicated by the double-dashed chain line) is placed on the inner side of the separator 12 (the left side in A-2 of FIG. 6 ).
  • the seven knitting yarns Y1 to Y3 and Y5 to Y8 other than the knitted yarn Y4 are placed on the outer side of the separator 12 (the right side in A-2 of FIG. 6 ), and held by clamping with the yarn holding member 31.
  • the yarn holding member 31 includes an air solenoid for controlling the flow rate of air, which performs a piston/cylinder operation to grasp/release the knitting yarns. In this state, the knitted yarn Y4 is fed in the top-to-bottom direction to pass the front of the piecing nozzle 21.
  • a control portion (not shown) provided in the flat-knitting machine sends a yarn change signal based on a previously inputted fabric pattern to the yarn selecting device 1, the yarn piecing device 2, the yarn feeding device 41, etc.
  • the yarn feeding device 41 is suspended to stop moving the knitted yarn Y4, so that the yarn selecting device 1, the yarn piecing device 2, etc., are activated.
  • the yarn selection plate G1 holding the choice yarn Y1 selected for type change (indicated by the dashed line) is driven, as shown in B-1 and B-2 of FIG. 6 .
  • the yarn selection plate G1 moves inwardly to set the choice yarn Y1 in the selecting position P1.
  • the yarn guiding lever 10 is rotated in an arrow direction III (normal rotation).
  • the yarn guiding lever 10 is rotated to allow its first catching portion 101 to catch the choice yarn Y1 in the selecting position P1, as shown in A-1 and A-2 of FIG. 7 .
  • the choice yarn Y1 is placed in the yarn regulating portion 103 of the yarn guiding lever 10, and thus guided downwardly while being regulated in the prescribed position P2.
  • the second catching portion 102 of the yarn guiding lever 10 projects higher than the separator 12, and moves along an arc-like upper edge 12a of the separator 12.
  • the state shown inA-1 of FIG. 7 is at the moment when the second catching portion 102 contacts and catches the knitted yarn Y4. In this state, a portion of the choice yarn Y1 and the knitted yarn Y4 are placed on the inner side of the separator 12.
  • the yarn guiding lever 10 is further rotated to place the first catching portion 101 in the lowest position lower than the piecing nozzle 21, as shown in B-1 and B-2 of FIG. 7 . Accordingly, the choice yarn Y1 is slid and guided while being caught by the first catching portion 101. The choice yarn Y1 is further slid and conducted on the yarn regulating portion 103 while being regulated in the prescribed position P2 by the yarn regulating portion 103 of the yarn guiding lever 10, and then guided to the front of the piecing nozzle 21.
  • the choice yarn Y1 is guided while being regulated in the prescribed position P2 by the yarn regulating portion 103, and therefore it is possible to move the choice yarn Y1 to the front of the piecing nozzle 21 without entanglement with the knitted yarn Y4 and other knitting yarns such as Y2 and Y3.
  • the second catching portion 102 contacts and catches the knitted yarn Y4, and in that state, the yarn guiding lever 10 is further rotated (see B-1 and B-2 of FIG. 7 ).
  • the knitted yarn Y4 is conducted while being caught by the second catching portion 102, moving from the inner side to the outer side of the separator 12.
  • the knitted yarn Y4 moves to a standby position P3 where the knitting yarns Y1 to Y3 and Y5 to Y8 (the knitting yarns other than the yarn being knitted) are on standby.
  • the yarn clutching member 30 is driven to clamp the knitting yarns Y2 to Y8 other than the choice yarn Y1 placed on the inner side of the separator 12, as shown in A-1 and A-2 of FIG. 8 .
  • the yarn end grasping suctioner 32 starts suctioning before the yarn holding member 31 is driven to release the yarn ends.
  • the yarn end grasping suctioner 32 grasps the ends of the knitting yarns Y1 to Y3 and Y5 to Y8.
  • the yarn clutching member 30 is configured to grasp/release the knitting yarns in accordance with the piston/cylinder operation of the air solenoid.
  • the yarn clutching member 30 is provided because the suction power of the yarn end grasping suctioner 32 is not enough to reliably hold the ends of the knitting yarns Y2 to Y8 due to tension applied by the repelling force of the top spring 46 provided in the flat-knitting machine, as shown in FIG. 1 .
  • a yarn inserting portion 20a included in the disk guide 20 presses the choice yarn Y1 guided to the front of the piecing nozzle 21, and the knitted yarn Y4, thereby inserting them into the yarn piecing chamber 21a of the piecing nozzle 21, as shown in B-1 and B-2 of FIG. 8 .
  • the choice yarn Y1 and the knitted yarn Y4 are placed in a yarn piecing position P4.
  • the rotational drive of the drive motor 50 causes rotational drive of a first drive gear 51 and a second drive gear 52 , as shown in FIG. 11 .
  • the first drive gear 51 is connected to a link mechanism (not shown) for allowing the yarn piecing device 2 to perform a series of operations to be described later.
  • the second drive gear 52 drives the disk guide 20.
  • the second drive gear 52 allows a first driven gear 53 to engage with a second driven gear 54, thereby rotationally driving the disk guide 20 attached to the second driven gear 54.
  • the disk guide 20 includes a notched portion having the hook-like yarn inserting portion 20a provided on one side.
  • the disk guide 20 is rotated in an arrow direction IV to move the choice yarn Y1 and the knitted yarn Y4, which are hooked and caught by the yarn inserting portion 20a, so that the yarns are pressed into the yarn piecing chamber 21a of the piecing nozzle 21.
  • the yarn piecing device 2 is activated, as shown in FIG. 10 .
  • the yarn piecing device 2 is an air splicer provided with the piecing nozzle 21 to jet out compressed air for yarn piecing.
  • the piecing nozzle 21 includes the yarn piecing chamber 21a for accommodating two knitting yarns.
  • the piecing nozzle 21 includes the air jetting means 26 for jetting out compressed air toward the yarnpiecing chamber 21a.
  • the nozzle opening 21b is provided so as to extend from the air jetting means 26 in the direction perpendicular to the yarn piecing chamber 21a.
  • the air jetting means 26 is configured to control the air jet by opening/closing the magnetic valve 27.
  • the piecing nozzle 21 has provided on one side with clamping means 22 for grasping two knitting yarns accommodated in the yarn piecing chamber 21a and placed in the yarn piecing position P4, and on the other side with the cutter 23 for cutting the two knitting yarns at their end segments, thereby adjusting their lengths. Furthermore, the piecing nozzle 21 is provided on one side with a nozzle cover 24 for closing one side of the yarn piecing chamber 21a, and a yarn pullout lever 25 for pulling out the yarns while adjusting the length to be pieced.
  • the piecing nozzle 21, the clamping means 22, the cutter 23, the nozzle cover 24, and the yarn pullout lever 25 are configured so as to be driven in conjunction with one another by the link mechanism (not shown) connected to the first drive gear 51.
  • the choice yarn Y1 and the knitted yarn Y4 are suctioned and grasped by the yarn end grasping suctioner 32 with their ends arranged to point in the same direction, as shown in A of FIG. 10 , and they are inserted into the yarn piecing chamber 21a of the piecing nozzle 21 so as to be placed in the yarn piecing position P4. Then, the choice yarn Y1 and the knitted yarn Y4 are grasped by the clamping means 22, and the nozzle cover 24 and the yarn pullout lever 25 move to the position to close the yarn piecing chamber 21a, as shown in B of FIG. 10 .
  • the cutter 23 is activated to cut the choice yarn Y1 and the knitted yarn Y4 at their end segments by a predetermined length, as shown in C of FIG. 10 .
  • the remaining end segment of the choice yarn Y1 is suctioned by the yarn end grasping suctioner 32.
  • the yarn pullout lever 25 slightly moves in an arrow direction V to adjust the length of the joint between the choice yarn Y1 and the knitted yarn Y4, as shown in D of FIG. 10 .
  • the air jetting means 26 is activated to blow compressed air to the choice yarn Y1 and the knitted yarn Y4 via the nozzle opening 21b, thereby untwisting the end portion of each knitting yarn (see E of FIG. 10 ).
  • the yarn pullout lever 25 is further moved in the arrow direction V to pull out the choice yarn Y1 and the knitted yarn Y4 from the yarn piecing chamber 21a (see F of FIG. 10 ).
  • Fibers at the untwisted yarn ends are entwined when passing near the compressed air outlet of the yarn piecing chamber 21a, thereby piecing the choice yarn Y1 with the knitted yarn Y4.
  • the choice yarn Y1 and the knitted yarn Y4 are pressed by the nozzle cover 24 to prevent shrinkage of the entwined portions, thereby rendering the joint resistant to the formation of lumps.
  • the yarn holding member 31 of the yarn selecting device 1 grasps the knitting yarns Y2 to Y8 other than the choice yarn Y1, as shown in A-1 and A-2 of FIG. 9 . Then, the yarn clutching member 30 releases the knitting yarns Y2 to Y8, and at the same time, the yarn end grasping suctioner 32 stops suctioning. Furthermore, in the eighth stage, the yarn guiding lever 10 is rotated back (reversed) to its original state, as shown in B-1 and B-2 of FIG. 9 . Thereafter, the yarn selection plate G returns to its original position, and the yarn feeding device 41 is activated with the choice yarn Y1 positioned on the inner side of the separator 12, so that the choice yarn Y1 is fed to the flat-knitting machine.
  • FIG. 12 is a time chart illustrating operational states of the above-described main components.
  • the drive motor 50 is rotated one revolution (0° to 360°), as shown in FIG. 12 .
  • the one revolution of the drive motor 50 causes the disk guide 20 to rotate one revolution, and drives the clamping means 22, the cutter 23, the nozzle cover 24, the yarn pullout lever 25, etc. , so that the yarn piecing operation is performed in a series from its start to completion.
  • the first catching portion 101 catches the choice yarn Y1 in the selecting position P1
  • the second catching portion 102 catches the knitted yarn Y4 , so that the knitted yarn Y4 is moved from the inner side to the outer side of the separator 12, as shown in FIG. 7 .
  • the choice yarn Y4 rather than the second catching portion 102, catches the knitted yarn Y1 and moves it from the inner side to the outer side of the separator 12, as shown in the illustrations in FIG. 13 (each showing the state in its corresponding illustration inFIG. 7).
  • the first catching portion 101 is rotated while catching the choice yarn Y4, so that the choice yarn Y4 moves while being placed astride the outer side and the inner side of the separator 12, as shown in A-1 and A-2 of FIG. 13 .
  • the knitted yarn Y1 crosses the choice yarn Y4, and therefore it contacts and catches the choice yarn Y4 before it is caught by the second catching portion 102.
  • the yarn guiding lever 10 is further rotated so that the choice yarn Y4 moves the knitted yarn Y1 from the inner side to the outer side of the separator 12, as shown in B-1 and B-2 of FIG. 13 .
  • the choice yarn crosses the knitted yarn after being caught by the first catching portion 101
  • the choice yarn rather than the second catching portion 102, catches the knitted yarn and moves it to the standby position P3.
  • the second catching portion 102 catches the knitted yarn and moves it to the standby position P3.
  • the yarn changing device according to the present invention can also be mounted in textile machinery such as an automatic winder for piecing yarns selected from among plural types of yarns.

Claims (2)

  1. Fadenwechseleinrichtung für eine Strickmaschine zur Auswahl eines Fadens aus mehreren Arten von Fadenlieferspulen (W1 - W8) zum Beispiel mit unterschiedlichen Farben, und eine Fadenzufuhreinrichtung (41), und zum Zuführen des ausgewählten Wahlfadens an die Fadenzufuhreinrichtung (41) nach dem Anknüpfen des Wahlfadens an einen zum Stricken verwendeten Strickfaden, wobei die Fadenwechreleinrichtung umfasst:
    Ansaugmittel (28) zum kollektiven Ansaugen und Halten einer Vielzahl von Fäden, und Spannmittel (29) zum kollektiven Spannen der Fäden zwischen dem Ansaugmittel (28) und den Fadenlieferspulen (W1 - W8), wobei das Spannmittel (29) erste und zweite Klemmen (29A, 29B) umfasst, die sich an zwei Stellen entlang eines Fadenwegs befinden und selektiv aktiviert werden, dadurch gekennzeichnet, dass
    die zweite Klemme (29B) des Spannmittels (29) ein Fadenhalteelement (31) umfasst, das sich eignet, um normalerweise die Fäden kollektiv eingespannt zu halten, die Klemme jedoch löst, wenn der Wahlfaden ausgewählt wird, wohingegen die erste Klemme (29A) ein Fadengreifelement (30) umfasst, das sich eignet, um normalerweise die Klemme zu lösen, die Fäden jedoch ergreifen kann, bevor das Fadenhalteelement (31) gelöst wird, wenn der Wahlfaden ausgewählt wird, und den Griff löst, nachdem das Halten des Fadens begonnen hat.
  2. Fadenwechseleinrichtung in einer Strickmaschine oder dergleichen gemäß Anspruch 1, dadurch gekennzeichnet, dass die erste Klemme (29A) des Spannmittels (29) zusammen mit dem Ansaugmittel (28) betrieben wird, so dass kollektiv eine Vielzahl von Fäden im Fadenweg während eines Ansaugvorgangs des Ansaugmittels (28) eingespannt wird.
EP06810616.0A 2005-10-13 2006-09-27 Adenwechseleinrichtung für eine strickmaschine oder dergleichen Active EP1956127B1 (de)

Applications Claiming Priority (2)

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JP2005298900 2005-10-13
PCT/JP2006/319125 WO2007043335A1 (ja) 2005-10-13 2006-09-27 編機等における糸切換装置

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EP1956127B1 true EP1956127B1 (de) 2014-11-12

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JP5984331B2 (ja) * 2010-12-29 2016-09-06 株式会社島精機製作所 横編機、およびその編地生産方法
CN109335833B (zh) * 2018-11-29 2023-09-01 西安工程大学 一种喂料机构和具有该喂料机构的花式纱线拼接机
CN112079198A (zh) * 2019-05-07 2020-12-15 安吉万洲电气有限公司 工作效率高的用于纺织生产的纺织线筒自动更换设备
CN110592757A (zh) * 2019-10-08 2019-12-20 江苏海特服饰股份有限公司 多色变换接头纱及其制备方法
CN113718419B (zh) * 2021-07-22 2023-09-22 安徽和邦纺织科技有限公司 一种混织织机
CN114753053A (zh) * 2022-05-17 2022-07-15 绍兴市立竹机械有限公司 一种手套机多色切换装置

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CH643015A5 (fr) * 1981-12-03 1984-05-15 Mayer & Cie Maschinenfabrik Metier a tricoter.
JP2614775B2 (ja) * 1990-03-03 1997-05-28 松崎工機株式会社 編成或いは織製時における給糸装置
JPH10279190A (ja) * 1997-04-08 1998-10-20 Yoshiro Otake 糸のスプライス装置
JP3985716B2 (ja) * 2002-05-09 2007-10-03 村田機械株式会社 紡績糸の糸継方法、および装置
JP3897174B2 (ja) 2003-07-03 2007-03-22 ノーリツ鋼機株式会社 感光材料の搬送装置
JP4110415B2 (ja) 2004-03-30 2008-07-02 村田機械株式会社 糸継ぎ装置およびハンディー型スプライサー

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KR101224566B1 (ko) 2013-01-21
CN101283136B (zh) 2010-10-20
JPWO2007043335A1 (ja) 2009-04-16
EP1956127A1 (de) 2008-08-13
JP5172346B2 (ja) 2013-03-27
CN101283136A (zh) 2008-10-08
KR20080057235A (ko) 2008-06-24
WO2007043335A1 (ja) 2007-04-19

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