EP1647619A1 - Method and apparatus for fabricating a three-dimensional warp knitted fabric having varied cross-sections as well as thus obtained fabric - Google Patents
Method and apparatus for fabricating a three-dimensional warp knitted fabric having varied cross-sections as well as thus obtained fabric Download PDFInfo
- Publication number
- EP1647619A1 EP1647619A1 EP04024758A EP04024758A EP1647619A1 EP 1647619 A1 EP1647619 A1 EP 1647619A1 EP 04024758 A EP04024758 A EP 04024758A EP 04024758 A EP04024758 A EP 04024758A EP 1647619 A1 EP1647619 A1 EP 1647619A1
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- EP
- European Patent Office
- Prior art keywords
- knitting
- guide
- knitted fabric
- warp knitted
- knitting needles
- 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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- 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
- D04B27/06—Needle bars; Sinker bars
- D04B27/08—Driving devices therefor
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B21/20—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting articles of particular configuration
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B23/00—Flat warp knitting machines
- D04B23/02—Flat warp knitting machines with two sets of needles
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B25/00—Warp knitting machines not otherwise provided for
- D04B25/06—Galloon crocheting machines
- D04B25/14—Galloon crocheting machines specially adapted for producing articles of particular configuration
-
- 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
- D04B27/24—Thread guide bar assemblies
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- 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
- D04B27/24—Thread guide bar assemblies
- D04B27/26—Shogging devices therefor
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2403/00—Details of fabric structure established in the fabric forming process
- D10B2403/02—Cross-sectional features
- D10B2403/021—Lofty fabric with equidistantly spaced front and back plies, e.g. spacer fabrics
- D10B2403/0211—Lofty fabric with equidistantly spaced front and back plies, e.g. spacer fabrics with corrugated plies
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2403/00—Details of fabric structure established in the fabric forming process
- D10B2403/02—Cross-sectional features
- D10B2403/022—Lofty fabric with variably spaced front and back plies, e.g. spacer fabrics
- D10B2403/0222—Lofty fabric with variably spaced front and back plies, e.g. spacer fabrics with at least one baggy or puckered ply
Definitions
- the present invention relates to a method and an apparatus for fabricating a three-dimensional warp knitted fabric having varied cross-sections, by a double-raschel machine as well as thus obtained fabric.
- the three-dimensional warp knitted fabric having varied cross-sections are knitted by a double-raschel machine having two rows or front and rear rows of knitting needles and having a plurality of yarn guide bars, in correspondence with the two knitting needle rows, for guiding connecting yarns and yarns for forming base webs.
- a double-raschel machine having two rows or front and rear rows of knitting needles and having a plurality of yarn guide bars, in correspondence with the two knitting needle rows, for guiding connecting yarns and yarns for forming base webs.
- the applicant has previously proposed an apparatus of changing an interval between front and rear knitting element supporting bodies as disclosed in, for example, JP-A-2000-80545.
- the proposed apparatus is of an adjusting system in which the trick plate is swung to displace around a supporting lever shaft.
- adjusting of a stroke of knitting needles is required for correcting a deviation of the stroke at a front end portion of the knitting needles.
- the applicant has also developed an apparatus of horizontally moving a total of the front and rear knitting-element supporting bodies at above front and rear base tables.
- the interval between the front and rear knitting-element supporting portions is set or changed in accordance with a change in a thickness of to-be knitted three-dimensional, which is allotted for each lot; thus, such setting or changing of the interval is assumed to be done at preparation before starting of the knitting.
- a conventional three-dimensional warp knitted fabric which is fabricated by a double-raschel knitting machine, has an almost constant thickness or a constant interval between front and rear webs; as knitting is made by keeping as constant the interval between the front and rear knitting element supporting bodies, that is, the interval between the front and rear knitting needle rows.
- the present invention has been carried out in view of the above to provide a three-dimensional warp knitted fabric having varied cross-sections that has varied thickness or varied interval between front and rear webs, or has varied convexo-concave patterns on a surface.
- the present invention is especially to provide a method and apparatus for easily fabricating such fabric.
- a method for fabricating a three-dimensional warp knitted fabric having varied cross sections, by use of a double-raschel machine that is comprised of: front and rear knitting needles (1a, 1b); front and rear knitting-elements supporting bodies (4a, 4b; 5a, 5b) for respectively supporting front and rear knitting elements (1a, 1b; 2a, 2b; 3a, 3b) including the front and rear knitting needles; a mechanism (11a, 11b; 13a, 13b; 15a, 15b; 17a, 17b) for moving the front and rear knitting-elements supporting bodies move in a front-rear direction to come close to or go away from each other; control unit for providing control signals to said mechanism for moving; and a plurality of yarn guide bars (18) for guiding yarns for forming front and rear webs (a1, a2) and connecting yarns; and the yarns being fed from the yarn guide bars (18) to the front and rear knitting needles (1a, 1b) so that the front and rear webs (a1,
- the three-dimensional warp knitted fabric having so-to-speak varied cross sections can easily be knitted to be fabricates, because a dimension between the two front and rear webs of the three-dimensional warp knitted fabric to be knitted, that is, the thickness and/or the shapes of recesses and projections of the surfaces of the webs can pertinently be changed in the knitting direction.
- the positions and the interval of the front and rear knitting needles may be changed by horizontal movement. It is not necessary to correct a deviation of a stroke at a distal end portion of the knitting needle; and therefore, the interval between the two knitting needles in knitting can easily be changed. Consequently, the method of the invention can be embodied without a problem.
- the front knitting needles (1a) along with the front knitting-elements supporting bodies (4a, 5a) are moved as controlled separately, to the rear knitting needles (1b) along with the rear knitting-elements supporting bodies (4b, 5b), so that cross sections are symmetrical or asymmetrical between front and rear surfaces in the three-dimensional knitted fabric.
- the positions of the front and rear knitting needles for knitting the front and rear webs can be changed separately; and therefore, it is facilitated to produce not only the three-dimensional warp knitted fabric that is symmetrical between the front and rear webs but also ones that is asymmetrical between the front and rear webs and has different convexo-concave patterns on the front and rear webs.
- the guide bar swinging width is considerably increased, even when the interval between the front and rear knitting needles is increased; knitting is carried out by passing each of the yarn guiding needles on yarn guide bars through the center position between the contiguous two knitting needles, in the front and rear direction.
- An apparatus for fabricating a three-dimensional warp knitted fabric having varied cross sections, formed of a double-raschel machine comprising: front and rear knitting needles (1a, 1b); front and rear knitting-elements supporting bodies (4a, 4b; 5a, 5b) for respectively supporting front and rear knitting elements (1a, 1b; 2a, 2b; 3a, 3b) including the front and rear knitting needles; a mechanism (11a, 11b; 13a, 13b; 15a, 15b; 17a, 17b) for moving the front and rear knitting-elements supporting bodies move in a front-rear direction to come close to or go away from each other; control unit for providing control signals to said mechanism for moving; and a plurality of yarn guide bars (18) for guiding yarns for forming front and rear webs (a1, a2) and connecting yarns; wherein said mechanism for moving (11a, 11b; 13a, 13b; 15a, 15b; 17a, 17b) is constructed to be able to vary positions and/or
- the knitting is the three-dimensional warp knitted fabric having the varied cross sections in which the thickness or the shapes of recesses and projections of the surfaces differs.
- the mechanism for moving may be constructed to control moving of the front and rear knitting element supporting bodies separately between front and rear sides.
- an asymmetric three-dimensional warp knitted fabric in which convexo-concave patterns on surfaces of the front and rear webs differ from each other; thus it is preferable in embodying the invention.
- the above-described fabricating apparatus further comprises a guide-swinging element for holding the respective yarn guide bars.
- the guide-swinging element is provided to move distal end parts of the yarn guide bars to swing substantially along a straight line in the front-rear direction relative to the front and rear knitting needles, by guide-bar swinging mechanism that is interposed between the guide-bar swinging element and a supporting body above a knitting area.
- the yarn guide bar for guiding the web forming yarns or the connecting yarns swings at always substantially the same vertical position relative to the front and rear knitting needles, even when the positions and the intervals of the front and rear knitting needles are changed. Even when the interval between the front and rear knitting needles is large, the yarn guiding needle on the yarn guide bar can be passed between the knitting needles in the same relationship to the front and rear knitting needles. Thus, it is facilitated to form the three-dimensional warp knitted fabric having the varied cross sections.
- the guide-bar swinging mechanism comprises a sliding support portion for slidably supporting the guide-bar swinging element in the front and rear direction orthogonal to the front and rear knitting needles; and driving mechanism for sliding the slidably supported guide-swinging element in synchronism with knitting operation of the knitting machine; wherein a front end of each yarn guide bar is linearly moved by the driving mechanism.
- the guide-bar swinging mechanism may be comprised of a four-shafts link mechanism constituted by; a supporting arm fixedly provided to a supporting body above a knitting area; an arm remote from the supporting arm in a lower direction and connected to the guide-bar swinging element; first and second supporting shafts arranged at the supporting arm; first and second swinging shafts arranged at the arm; first and second links for respectively connecting the first supporting shaft to the first swinging shaft as well as the second supporting shaft to the second swinging shaft.
- At least one of the first and the second supporting shafts is connected with rotation driving means for rotating the supporting shaft pertinently in synchronism with knitting operation of the knitting machine; the supporting shaft is fixedly connected with one of the first and the second links, and distal end of the yarn guide bar is linearly moved by the rotational driving mechanism.
- the invention-wise three-dimensional warp knitted fabric is fabricated by the fabricating method, wherein a thickness between front and rear webs and/or shapes of recesses and projections of surfaces of the front and rear webs are varied in a knitting direction.
- the three-dimensional warp knitted fabric is excellent in fanciness or ornamental appearance or appeal due to the variation in the thickness and/or patterns of recesses and projections of the surfaces.
- Properties such as elasticity, pressure resistance or the like may be varied locally or on area-to-area base, so that the fabrics are applicable for interior goods, sheets, cushions and the like.
- Fig. 1 through Fig. 3 show an apparatus, according to a first embodiment of the invention, for fabricating a three-dimensional warp knitted fabric having varied cross-sections.
- Fig. 1 is a side sectional view showing an outline of a double-raschel machine constituting the fabricating apparatus
- Fig. 2 is a front view of that shown above, as partially omitting a part associated with an actuator lever
- Fig. 3 is a sectional view showing a modified example in respect of a portion for driving an actuator shaft.
- notation 1a designates a front knitting needle
- notation 1b designates a rear knitting needle
- numbers thereof are arranged respectively in line along a width direction of a knitting machine (direction orthogonal to paper face of Fig. 1) to constitute front and rear knitting needle rows.
- Notation 2a designates a front trick plate
- notation 2b designates a rear trick plate
- respective ones thereof are extended in the width direction of the knitting machine in correspondence with the knitting needle rows.
- Notation 3a designates a front stitch comb
- notation 3b designates a rear stitch comb
- respective ones thereof are arranged respectively in line along the width direction of the knitting machine in correspondence with the knitting needle rows.
- Notation 4a designates an intermediate frame at front or a member at front side for supporting so-to-speak knitting elements such as the knitting needles or the knitting needle row, the trick plate, the switch comb, a tong, and a sinker.
- Notation 4b designates an intermediate frame at rear or a member at rear side for supporting the knitting elements. Pluralities of the front and rear intermediate frames 4a, 4b are erected to fix onto a front base table 5a and a rear base table 5b, as opposed with each counterpart in front-rear wise direction and as spaced apart in the width direction of the knitting machine.
- the intermediate frames 4a, 4b are installed respectively at a front side and a rear side of a foundation trestle 6 movably in a front and rear direction of the knitting machine, or left and right direction of paper face of Fig. 1.
- the front base table 5a and rear base table 5b are supported movably in the front and rear direction in a manner as; guides 9a, 9b on lower faces of the base tables 5a, 5b are respectively engaged with front and rear linear guides 10a, 10b on an upper face of the foundation trestle 6. Meanwhile, screw shafts 11a, 11b extended in the front and rear direction are arranged between the lower faces of the front base table 5a and the rear base table 5b, respectively, and the upper face of the foundation trestle 6, at required locations in the width direction of the knitting machine.
- the screw shafts 11a, 11b are respectively supported by bearings 12a, 12b fixed on a front-end portion and a rear end portion of the foundation trestle 6.
- the screw shafts 11a, 11b are screwed to nuts 13a, 13b that are respectively fixed on lower faces of the front base table 5a and the rear base table 5b.
- Bevel gears 14a and 14b are respectively fixed to an end portion of the front screw shaft 11a, which projects frontward from the front base table, and an end portion of the rear screw shaft 11b, which projects rearward from the rear base table.
- the bevel gears 14a and 14b are brought in mesh with bevel gears 16a, 16b on power transmission shafts 15a, 15b.
- the power transmission shafts 15a, 15b are respectively connected to motors 17a, 17b for driving, via some power transmission mechanisms in accordance with situation. That is, the screw shafts 11a, 11b are respectively rotated via the bevel gears 14a, 14b and 16a, 16b on the power transmission shafts 15a, 15b by rotational drive forces of the motors 17a, 17b. Consequently, the front base table 5a and the rear base table 5b are respectively moved linearly in the front and rear direction of the knitting machine in proportion to the rotation.
- the motor 17a, 17b are respectively driven as properly controlled by move-wise control signals from a not-illustrated control unit so that the move the front base table 5a and the rear base table 5b are controlled.
- the front and rear screw shafts 11a, 11b which are for moving the front and rear intermediate frames 4a, 4b supporting the knitting elements, are constituted separately as to separately control moving of the front and rear base tables 5a and 5b.
- the front and rear screw shafts 11a, 11b may be connected to each other by a coupling or the like.
- the screw shafts 11a, 11b are threaded as righthand and left-hand as inverse to each other so that clockwise or anti-clockwise rotation of the shafts induces simultaneous moving of the front and rear base tables 5a and 5b as to come close to and go away from each other.
- Numeral 18 designates a plurality of yarn guide bars for respectively guiding yarns for forming front and rear webs and connecting yarns.
- Each of the yarn guide bars 18 is provided with yarn guiding needles 18a at distal end thereof, in correspondence with the front knitting needles 1a or the rear knitting needles 1b.
- the yarn guide bars 18 are front-rear wise arrayed or overlapped, at above a knitting area consisting of the knitting needles 1a, 1b or knitting needle rows.
- the number of the yarn guide bars 18 may be increased or decreased in accordance with to-be knitted three-dimensional fabric. The number may be increased even to 20 or more.
- Numeral 20 designates a guide-bar swinging element comprising an arcuate shaped mounting brace 21 to which each of the yarn guide bars 18 is attached and a link 22 extended upward from the mounting brace 21.
- Each of the yarn guide bars 18 is displaceable in its longitudinal direction because a pin 19 is projected from an inverse-T shaped mounting strip 18b located on top of the guide bar 18 and is attached to the mounting brace 21 through a not-illustrated stroke bearing. In this way, predetermined shogging motion may be imparted to the guide bar at a side part on the knitting machine.
- the guide-bar swinging element 20 is connected to a supporting body 23, such as a traverse, which is extended in the width direction of the knitting machine, via guide-bar swinging mechanism 24 to be mentioned later.
- the guide-bar swinging mechanism 24 imparts swinging along a straight line in the front and rear direction orthogonal to rows of the front and rear knitting needles 1a, 1b as in arrows of Fig. 4, to the guide bars 18 so as to accordingly move the yarn guiding needles 18a at distal ends of the yarn guide bars 18.
- a plurality of the guide-bar swinging elements 20 are distributed in the width direction of the knitting machine to be spaced go away from each other at predetermined intervals. Onto the plurality of guide-bar swinging elements 20, each of the yarn guide bars 18 is attached.
- the guide-bar swinging mechanism 24 may be embodied in various manners other than the above-described, and may imparts, for example, a motion along an arcuate line, to the guide bars. Nevertheless, in the first embodiment, a swinging motion along a straight line is imparted.
- a linear guide 25 is attached as a slide support, onto a lower face of the supporting body 23 having a section in a rectangle shape so that the linear guide is arranged in the front and rear direction or width direction of the supporting body 23.
- a lower portion of the linear guide 25 is widened in its cross section.
- An upper end portion 22a of the link 22 of the guide-bar swinging element 20 is supported by and engaged with the linear guide 25 as to be able to slide in the front and rear direction relative to the linear guide 25 and as not to come off downward.
- one end portion of a connecting strip 27 is attached as hinged to a portion of the link 22; and other end portion of the connecting strip 27 is connected to and hung from a lower end portion of an actuator lever 29, which is supported by and hinged on a hinging support shaft 28, through a pin as a connecting element.
- An actuator piece 32 is attached, through an eccentric cam mechanism 31, to an actuator shaft 30 that is arranged in the width direction of the knitting machine at inside of the supporting body 23.
- a projection 32a of the actuator piece 32 is projected through an opening 33 opened at a side face of the supporting body 23 and is coupled to a middle portion of the actuator lever 29 through a pin 34 as a connecting element.
- the guide-bar swinging element 20 is displaced in the front and rear direction by front-rear-wise motion of the projection 32a accompanied with rotation of the actuator shaft 30.
- the front-rear-wise motion causes swinging of the actuator lever 29 around the hinging support shaft 28 and then moving the connecting strip 27 as to cause such displacement of the guide-bar swinging element 20.
- the actuator shaft 30 is controlled to rotate in synchronism with operation of the knitting machine.
- a motor 35 for driving is connected to an end portion of the actuator shaft 30 as shown by Fig. 2, the motor 35 is pertinently controlled by a control signal from the control unit to thereby control the rotation of the actuator shaft 30.
- the actuator shaft 30 may be controlled as in an example shown in Fig. 3.
- a pulley 36 is attached on an end of the actuator shaft 30.
- a power transmission belt which is preferably a timing belt, is wound around between the pulley 36 and another pulley 38 that is attached on the camshaft 8a or 8b of the knitting machine or on an intermediate shaft rotated in synchronism with the camshaft 8a or 8b. In this way, rotation of the camshaft 8a or 8b is directly or indirectly transmitted to the actuator shaft 30.
- Fig. 1 designates a three-dimensional warp knitted fabric having varied cross-sections which is being knitted.
- the knitting needles 1a, 1b carry out predetermined knitting movement such as up-down and swinging motion.
- the guide-bar swinging element 20 thereabove carries out guide-swinging movement in the front and rear direction in synchronism with the knitting movement by being driven by the actuator shaft 30 in the guide-bar swinging mechanism 24.
- the guide-swinging movement is carried out particularly by the linear guide 25 in the guide-bar swinging mechanism 24.
- the respective yarn guide bars 18 attached to the guide-bar swinging element 20 moves along a straight line in the front and rear direction orthogonal to the rows of front and rear knitting needles 1a, 1b, as indicated by solid-line and chained-line arrows on Fig. 4.
- the front and rear webs a1, a2 are respectively knitted by the web forming yarn guided by the respective yarn guide bars 18 and the front and rear webs are connected as knitted together by the connecting yarn.
- the control unit When knitting the three-dimensional warp knitted fabric A, the control unit sends control signals in accordance with a shaping or conformation of the knitted fabric A, to the motor 17a, 17b for respectively driving the front and rear screw shafts 11a, 11b, which are respectively for moving the front base table 5a and the rear base table 5b in the front and rear direction.
- rotation of the screw shafts 11a, 11b is controlled at pertinent extents, and thereby the front and rear base tables 5a, 5b are moved correspondingly; so that the front and rear intermediate frames 4a, 4b for supporting the knitting elements including the front and rear knitting needles 1a, 1b are respectively moved in desired directions and in desired extents.
- fabric A is knitted while pertinently changing or adjusting the positions and/or the interval of the two knitting needles 1a, 1b.
- Moving directions and moving distances of the two intermediate frames 4a, 4b may be set or selected in various manner by the control signals from the control unit.
- the front and rear knitting needles 1a, 1b may be simultaneously moved in front and rear opposite directions by the same distance.
- Other than such manner of moving only either one of the front and rear knitting needles 1a, 1b may be moved. In otherwise, they may be moved in same direction, or by different distance; or any combinations of these may be adopted.
- changing the positions or the interval of the two knitting needles 1a, 1b is facilitated on course of knitting the fabric.
- the three-dimensional warp knitted fabric "A" having symmetric or asymmetric varied cross sections in knitting direction may be fabricated, in same manner with conventional or normal three-dimensional warp knitted fabric.
- the positions or the interval of the front and rear knitting needles 1a, 1b may be changed symmetrically in the front and rear direction on course of the knitting.
- the three-dimensional warp knitted fabrics "A" are fabricated in which convexo-concave patterns on surfaces of the front and rear web a1, a2 are symmetrical between the webs.
- the interval by changing position of either one of the front and rear knitting needles 1a, 1b, on course of the knitting.
- he three-dimensional warp knitted fabrics "A" are fabricated in which convexo-concave pattern is formed on only one of the front and rear webs a1, a2. Further in otherwise, positions or the interval of the front and rear knitting needles 1a, 1b may be changed asymmetrically in the front and rear direction on course of the knitting. Then, the three-dimensional warp knitted fabrics "A” as shown by Fig. 11A, Fig. 11B, Fig. 11C and Fig. 11D are fabricated.
- the respective yarn guide bars 18 attached to the guide-bar swinging elements carry out guide-bar swinging movement along a straight line in the front and rear direction orthogonal to the rows of front and rear knitting needles 1a, 1b.
- relationships between the front and rear knitting needles and the yarn guiding needles 18a on distal end of the yarn guide bar 18 are kept constant when passing the yarns between them.
- it is facilitated to fabricate the three-dimensional warp knitted fabrics in which the dimension between the front and rear webs, that is, thickness are varied, or in which the convexo-concave patterns on surfaces are varied.
- Fig. 5 through Fig. 7 show a second embodiment of the invention-wise apparatus for fabricating three-dimensional warp knitted fabric having varied cross sections.
- Fig. 5 thereamong is a side sectional view showing an outline of a double-raschel machine constituting the fabricating apparatus.
- Fig. 6 is a sectional view taken along a line VI-VI of the same, and
- Fig. 7 is a sectional view taken along line VII-VII of the same.
- the apparatus of the second embodiment is modified from that of the first embodiment in respect of the guide-bar swinging mechanism 24 that imparts swinging movement to the guide-bar swinging element 20 holding the every yarn guide bars 18.
- a supporting arm 40 extended in either of the front and rear direction is fixed at a lower face of the supporting body 23 that has a rectangular cross section and is located at above the knitting area.
- a first supporting shaft 41 and a second supporting shaft 42 respectively extended in the width direction of the knitting machine are rotatably inserted, via bearings 43, 44, in through holes on a middle portion and a front end portion of the supporting arm 40 in respect of its extending direction; and the first and second the direction of extending of the supporting arm 40 supporting shafts 41, 42 are spaced go away from each other by a necessary interval.
- the guide-bar swinging element 20 comprises the arcuate-shaped mounting brace 21 and a connecting arm 45 that is connected to the mounting brace 21 and is bent and extended in a direction same as that of the supporting arm 40 in either of the front and rear direction.
- the connecting arm 45 is spaced go away from the supporting arm 40 as located on a slightly lower side thereof.
- the connecting arm 45 bends at a middle portion thereof to constitute substantially V-like shape in view from a side direction of the knitting machine.
- the bent portion and a distal end portion of the connecting arm 45 are pivotably arranged with a first swinging shaft 46 and a second swinging shaft 47, which are rotatable about axes in parallel with the first supporting shaft 41 and the second supporting shaft 42.
- the supporting arm 40 and the connecting arm 45 are combined as to jointly form a four-shafts link mechanism, by which the first supporting shaft 41 and the first swinging shaft 46 are connected by a first link member 48 and the second supporting shaft 42 and the second swinging shaft 47 are connected by a second link member 49.
- At least one of the first and second link members 48,49, for example, the first link member 48 is connected to the first supporting shaft 41.
- the supporting shaft 41 is driven to rotate in clockwise and anti-clockwise direction within a required angle.
- the first link member 48 is pivoted in the front and rear direction of the knitting machine centering on the supporting shaft 41; in accordance therewith, the second link member 49 is pivoted centering on the second supporting shaft 42.
- the connecting arm 45 and therefore, the guide-bar swinging element 20 pivots to be displaced in the front and rear direction of the knitting machine in synchronism with the knitting operation of the knitting machine.
- a moving range or distance of a pivoting displacement and a manner of moving are easily modified or selected by adjusting: a rotational angle of the first supporting shaft 41; positions or an interval of the first and second supporting shafts 41 42 on the supporting arm 40; positions and an interval of the first and second swinging shafts on the arm 45; lengths of the first and second link members 48, 49 and the like.
- the guide-bar swinging element 20 and therefore, the respective yarn guide bars 18 attached and held thereby may be moved substantially along a straight line substantially in the horizontal state.
- a lever 50 is fixed to the supporting shaft 41; a connecting rod 51 axially supported by and connected to the lever 50 is connected to the cam shaft 8a of the knitting machine; and the first supporting shaft 41 may rotate clockwise or anticlockwise by required angles in accordance with rotation of the cam shaft 8a as its rotation causes moving of the connecting rod 51 in the up and down direction and then motion is transmitted through a lever 50 to the first supporting shaft 41.
- he lever 50 and the connecting rod 51 may be omitted so that the first supporting shaft 41 may be driven to rotate clockwise or anticlockwise directly by driving unit such as a servomotor (not illustrated).
- the knitting needles 1a, 1b carry out predetermined knitting movement; simultaneously therewith, the guide-bar swinging element 20 thereabove carries out movement of pivoting to displace in the front and rear direction of the knitting machine in response of clockwise or anticlockwise rotating of the first supporting shaft 41 in the guide-bar swinging mechanism 24, through working of the 4 shafts link mechanism constituted by the supporting arm 40, the arm 45, the first and second supporting shafts 41, 42, and the first and second swinging shafts 46, 47.
- the yarn guide bars 18 attached to the guide-bar swinging element 20 carry out guide-bar swinging movement in the front and rear directions substantially orthogonal to the rows of front and rear knitting needles 1a, 1b.
- the front and rear webs a1, a2 are formed by the web forming yarns guided by the respective yarn guide bars 18; and the front and rear webs are knit-wise connected by the connecting yarn.
- the positions and/or the interval of the front and rear knitting needles 1a, 1b is shifted as required by respectively moving the front and rear intermediate frames 4a, 4b, which is for supporting the knitting elements including the front and rear knitting needles 1a, 1b, in arbitrary directions and to arbitrary positions.
- the three-dimensional warp knitted fabric A having the various patterns of varied cross-sections exemplified in Fig. 9 through Fig. 11 are fabricated; in which the dimension between the front and rear webs (thickness) and/or the convexo-concave patterns the surfaces of the front and rear webs are varied in the knitting direction; as easily to the case of the normal three-dimensional warp knitted fabric.
- Fig. 8A and Fig. 8B show a specific example for keeping each of the yarn guiding needles 18a substantially at centers between one and next one of the knitting needles 1a, 1b while swinging of the yarn guiding needles 18a, as to cope with variation in the positions and/or the interval of the front and rear knitting needles 1a, 1b.
- This specific example is applicable to both of the first and second embodiments.
- numeral 55 designates a displacement generating device for imparting a displacement in the width direction of the knitting machine, or shogging movement, to the yarn guide bars 18 from one side portion of the knitting machine, in accordance with a knitting pattern.
- the displacement generating apparatus 55 is provided with a plurality of pairs of connecting pins 57 that are moved forward and rearward respectively by not-illustrated ball screws and servomotors 56 in correspondence with the respective yarn guide bars 18.
- An attaching member 58 is disposed on distal ends of each pair of the connecting pins 57; and the attaching member 58 is connected through a rod 59, to respective mounting strip 18b in the inverse-T shape arranged on an end portion of respective one of the yarn guide bar 18.
- Required displacement is imparted to each yarn guide bar 18 by driving of the respective servomotor 56.
- the knitting is carried out such that in correspondence with the deviation in the positions and/or the interval of the front and rear knitting needles 1a, 1b, the servomotor 56 is driven as controlled to cancel the positional deviation, by pertinent control signals from the control unit.
- Swinging positions of the yarn guiding needles 18a on the respective yarn guide bars 18 are disposed substantially at the centers between the two successive knitting needles 1a or 1b in the front or rear knitting needle rows.
- the concept of the fabricating method according to the invention may be embodied in knitting the three-dimensional warp knitted fabric such as: in the case in which the front and rear knitting needles 1a, 1b do not constitute the knitting needle rows; or in the case in which the yarn guide bars do not swing and only the front and rear knitting needles swing in the front and rear direction.
- a knitting system or a mechanism therefore may be constructed as follows within compass of the invention. At least one piece or more of the front knitting needle and at least one of the rear knitting needle is able to carry out the knitting. For at least part of the front and rear knitting elements, members including piezoelectric elements or the like are used and controlled for fabricating the three-dimensional warp knitted fabric of the invention.
- the fabricating method and the fabricating apparatus of the invention it is facilitated to produce the three-dimensional warp knitted fabrics having the varied cross sections.
- it is facilitated to produce those having variations in knitting direction in respect of thickness or convexo-concave patterns on the surfaces.
- the three-dimensional warp knitted fabric provided in this way is excellent in ornamental appearance or fanciness as a result of varying in the thickness or convexo-concave patterns on the surfaces.
- elasticity, pressure resistance or the other property may be changed locally on the fabric.
- invention-wise fabric may be suitably used on interior goods, sheets, cushions and the like.
Abstract
Description
- The present invention relates to a method and an apparatus for fabricating a three-dimensional warp knitted fabric having varied cross-sections, by a double-raschel machine as well as thus obtained fabric.
- Conventionally, the three-dimensional warp knitted fabric having varied cross-sections are knitted by a double-raschel machine having two rows or front and rear rows of knitting needles and having a plurality of yarn guide bars, in correspondence with the two knitting needle rows, for guiding connecting yarns and yarns for forming base webs. When to change a thickness of a fabric to be knitted, it is necessary to change an interval of the front and rear knitting needle rows opposed to each other; therefore, there is needed an apparatus of changing an interval of front and rear knitting-element supporting bodies including the knitting needle rows and front and rear trick plates accompanied thereby.
- The applicant has previously proposed an apparatus of changing an interval between front and rear knitting element supporting bodies as disclosed in, for example, JP-A-2000-80545.
- Further, the proposed apparatus is of an adjusting system in which the trick plate is swung to displace around a supporting lever shaft. Thus, adjusting of a stroke of knitting needles is required for correcting a deviation of the stroke at a front end portion of the knitting needles. In view of this, the applicant has also developed an apparatus of horizontally moving a total of the front and rear knitting-element supporting bodies at above front and rear base tables.
- However, in either of the methods, the interval between the front and rear knitting-element supporting portions is set or changed in accordance with a change in a thickness of to-be knitted three-dimensional, which is allotted for each lot; thus, such setting or changing of the interval is assumed to be done at preparation before starting of the knitting.
- Consequently, a conventional three-dimensional warp knitted fabric, which is fabricated by a double-raschel knitting machine, has an almost constant thickness or a constant interval between front and rear webs; as knitting is made by keeping as constant the interval between the front and rear knitting element supporting bodies, that is, the interval between the front and rear knitting needle rows.
- Thus, conventionally, by varying tension of the yarns fed to the knitting area such as connecting yarns, by varying of knitting pattern or by use of elastic yarns or the like, some variation of the thickness of the three-dimensional warp knitted fabric is induced merely to provide a patterned indented surface. Thus obtained fabric has a relatively small extent of variation in thickness or convexo-concave variation; thus its appearance is poor in ornamental effect. Hence, such fabric is not fully satisfactory. Further, such varying or changing of the tension or of the knitting pattern is troublesome and is not preferable in view of a fabricating efficiency.
- The present invention has been carried out in view of the above to provide a three-dimensional warp knitted fabric having varied cross-sections that has varied thickness or varied interval between front and rear webs, or has varied convexo-concave patterns on a surface. The present invention is especially to provide a method and apparatus for easily fabricating such fabric.
- A method for fabricating a three-dimensional warp knitted fabric having varied cross sections, by use of a double-raschel machine that is comprised of: front and rear knitting needles (1a, 1b); front and rear knitting-elements supporting bodies (4a, 4b; 5a, 5b) for respectively supporting front and rear knitting elements (1a, 1b; 2a, 2b; 3a, 3b) including the front and rear knitting needles; a mechanism (11a, 11b; 13a, 13b; 15a, 15b; 17a, 17b) for moving the front and rear knitting-elements supporting bodies move in a front-rear direction to come close to or go away from each other; control unit for providing control signals to said mechanism for moving; and a plurality of yarn guide bars (18) for guiding yarns for forming front and rear webs (a1, a2) and connecting yarns; and the yarns being fed from the yarn guide bars (18) to the front and rear knitting needles (1a, 1b) so that the front and rear webs (a1, a2) are formed and simultaneously connected by the connecting yarns on proceeding of knitting; wherein on the proceeding of the knitting, positions of and/or an interval between the front and rear knitting needles (1a, 1b) are varied by said mechanism for moving (11a, 11b; 13a, 13b; 15a, 15b; 17a, 17b), so that convexo-concave patterns on surfaces of the front and rear webs and/or a dimension between the front and rear webs are varied in the three-dimensional warp knitted fabric knitted in a single continuous knitting process.
- According to the above fabricating method, the three-dimensional warp knitted fabric having so-to-speak varied cross sections can easily be knitted to be fabricates, because a dimension between the two front and rear webs of the three-dimensional warp knitted fabric to be knitted, that is, the thickness and/or the shapes of recesses and projections of the surfaces of the webs can pertinently be changed in the knitting direction.
- In the above fabricating method, by making totals of the front and rear knitting element supporting bodies supporting the knitting elements of the knitting needles or the like remote from each other and proximate to each other in the front and rear direction, the positions and the interval of the front and rear knitting needles may be changed by horizontal movement. It is not necessary to correct a deviation of a stroke at a distal end portion of the knitting needle; and therefore, the interval between the two knitting needles in knitting can easily be changed. Consequently, the method of the invention can be embodied without a problem.
- In the above-described fabricating method, the front knitting needles (1a) along with the front knitting-elements supporting bodies (4a, 5a) are moved as controlled separately, to the rear knitting needles (1b) along with the rear knitting-elements supporting bodies (4b, 5b), so that cross sections are symmetrical or asymmetrical between front and rear surfaces in the three-dimensional knitted fabric. Thus, the positions of the front and rear knitting needles for knitting the front and rear webs can be changed separately; and therefore, it is facilitated to produce not only the three-dimensional warp knitted fabric that is symmetrical between the front and rear webs but also ones that is asymmetrical between the front and rear webs and has different convexo-concave patterns on the front and rear webs.
- Further, it is preferable to further comprise a guide-bar swinging element (20) for holding the yarn guide bars (18), wherein, on proceeding of the knitting, the guide-bar swinging element is moved to swing the guide bars in the front-rear direction by guide-bar swinging mechanism (24) connected to a supporting body above a knitting area; and a position of the guide-bar swinging element (20) is controlled such that a position of swinging a yarn guiding needle (18a) at a distal end of the yarn guide bar is disposed substantially at a center between the two contiguous knitting needles, in response to varying in positions of and/or an interval between the front and rear knitting needles (1a, 1b). By such construction, the guide bar swinging width is considerably increased, even when the interval between the front and rear knitting needles is increased; knitting is carried out by passing each of the yarn guiding needles on yarn guide bars through the center position between the contiguous two knitting needles, in the front and rear direction.
- An apparatus for fabricating a three-dimensional warp knitted fabric having varied cross sections, formed of a double-raschel machine, comprising: front and rear knitting needles (1a, 1b); front and rear knitting-elements supporting bodies (4a, 4b; 5a, 5b) for respectively supporting front and rear knitting elements (1a, 1b; 2a, 2b; 3a, 3b) including the front and rear knitting needles; a mechanism (11a, 11b; 13a, 13b; 15a, 15b; 17a, 17b) for moving the front and rear knitting-elements supporting bodies move in a front-rear direction to come close to or go away from each other; control unit for providing control signals to said mechanism for moving; and a plurality of yarn guide bars (18) for guiding yarns for forming front and rear webs (a1, a2) and connecting yarns; wherein said mechanism for moving (11a, 11b; 13a, 13b; 15a, 15b; 17a, 17b) is constructed to be able to vary positions and/or an interval of the front and rear knitting needles (1a, 1b) on receiving of the control signals from the control unit, while proceeding of the knitting.
- According to the above fabricating apparatus, obtainable by the knitting is the three-dimensional warp knitted fabric having the varied cross sections in which the thickness or the shapes of recesses and projections of the surfaces differs. The mechanism for moving may be constructed to control moving of the front and rear knitting element supporting bodies separately between front and rear sides. Then, easily obtainable is an asymmetric three-dimensional warp knitted fabric in which convexo-concave patterns on surfaces of the front and rear webs differ from each other; thus it is preferable in embodying the invention.
- Particularly preferably, the above-described fabricating apparatus further comprises a guide-swinging element for holding the respective yarn guide bars. The guide-swinging element is provided to move distal end parts of the yarn guide bars to swing substantially along a straight line in the front-rear direction relative to the front and rear knitting needles, by guide-bar swinging mechanism that is interposed between the guide-bar swinging element and a supporting body above a knitting area.
- Thereby, the yarn guide bar for guiding the web forming yarns or the connecting yarns swings at always substantially the same vertical position relative to the front and rear knitting needles, even when the positions and the intervals of the front and rear knitting needles are changed. Even when the interval between the front and rear knitting needles is large, the yarn guiding needle on the yarn guide bar can be passed between the knitting needles in the same relationship to the front and rear knitting needles. Thus, it is facilitated to form the three-dimensional warp knitted fabric having the varied cross sections.
- For example, the guide-bar swinging mechanism comprises a sliding support portion for slidably supporting the guide-bar swinging element in the front and rear direction orthogonal to the front and rear knitting needles; and driving mechanism for sliding the slidably supported guide-swinging element in synchronism with knitting operation of the knitting machine; wherein a front end of each yarn guide bar is linearly moved by the driving mechanism.
- The guide-bar swinging mechanism may be comprised of a four-shafts link mechanism constituted by; a supporting arm fixedly provided to a supporting body above a knitting area; an arm remote from the supporting arm in a lower direction and connected to the guide-bar swinging element; first and second supporting shafts arranged at the supporting arm; first and second swinging shafts arranged at the arm; first and second links for respectively connecting the first supporting shaft to the first swinging shaft as well as the second supporting shaft to the second swinging shaft. At least one of the first and the second supporting shafts is connected with rotation driving means for rotating the supporting shaft pertinently in synchronism with knitting operation of the knitting machine; the supporting shaft is fixedly connected with one of the first and the second links, and distal end of the yarn guide bar is linearly moved by the rotational driving mechanism.
- The invention-wise three-dimensional warp knitted fabric is fabricated by the fabricating method, wherein a thickness between front and rear webs and/or shapes of recesses and projections of surfaces of the front and rear webs are varied in a knitting direction.
- The three-dimensional warp knitted fabric is excellent in fanciness or ornamental appearance or appeal due to the variation in the thickness and/or patterns of recesses and projections of the surfaces. Properties such as elasticity, pressure resistance or the like may be varied locally or on area-to-area base, so that the fabrics are applicable for interior goods, sheets, cushions and the like.
-
- Fig. 1 is a side sectional view showing an outline of a double-raschel machine, which constitutes an apparatus of fabricating a three-dimensional warp knitted fabric having varied cross-sections, according to a first embodiment of the invention;
- Fig. 2 is a front view of that shown above, as partially omitting a part associated with an actuator lever;
- Fig. 3 is a front view in same manner as above, as partially omitting a part associated with an actuator lever and showing a modified example in respect of a portion for driving an actuator shaft;
- Fig. 4 is an enlarged explanatory view showing a manner of moving of a yarn guide bar relative to front and rear knitting needles;
- Fig. 5 is a side sectional view showing an outline of a double-raschel machine constituting an apparatus according to a second embodiment of the invention;
- Fig. 6 is a sectional view taken along a line VI-VI of the double-raschel machine of Fig. 5;
- Fig. 7 is a sectional view taken along a line VII-VII of the double-raschel machine of Fig. 5;
- Fig. 8A is a schematic front view showing an outline of an apparatus of producing a displacement in a width direction of a knitting machine relative to a yarn guide bar at a side portion of the knitting machine.
- Fig. 8B is an explanatory view of a state of shifting a position by swinging a guide bar by a rod of the apparatus of producing the displacement.
- Fig. 9A, Fig. 9B and Fig. 9C are schematic sectional perspective views respectively showing examples of varied cross-section three-dimensional warp knitted fabrics according to the invention.
- Fig. 10A, Fig. 10B, Fig. 10C and Fig. 10D are schematic sectional perspective views respectively showing other examples of varied cross-section three-dimensional warp knitted fabrics according to the invention.
- Fig. 11A, Fig. 11B, Fig. 11C and Fig. 11D are schematic sectional perspective views respectively showing still other examples of varied cross-section three-dimensional warp knitted fabrics according to the invention.
- An explanation will be given of embodiments of the invention along with examples of the apparatus shown in the drawings, as follows.
- Fig. 1 through Fig. 3 show an apparatus, according to a first embodiment of the invention, for fabricating a three-dimensional warp knitted fabric having varied cross-sections. Among them, Fig. 1 is a side sectional view showing an outline of a double-raschel machine constituting the fabricating apparatus; Fig. 2 is a front view of that shown above, as partially omitting a part associated with an actuator lever; and Fig. 3 is a sectional view showing a modified example in respect of a portion for driving an actuator shaft.
- In the drawings,
notation 1a designates a front knitting needle,notation 1b designates a rear knitting needle, and numbers thereof are arranged respectively in line along a width direction of a knitting machine (direction orthogonal to paper face of Fig. 1) to constitute front and rear knitting needle rows.Notation 2a designates a front trick plate,notation 2b designates a rear trick plate, and respective ones thereof are extended in the width direction of the knitting machine in correspondence with the knitting needle rows.Notation 3a designates a front stitch comb,notation 3b designates a rear stitch comb, and respective ones thereof are arranged respectively in line along the width direction of the knitting machine in correspondence with the knitting needle rows. -
Notation 4a designates an intermediate frame at front or a member at front side for supporting so-to-speak knitting elements such as the knitting needles or the knitting needle row, the trick plate, the switch comb, a tong, and a sinker.Notation 4b designates an intermediate frame at rear or a member at rear side for supporting the knitting elements. Pluralities of the front and rearintermediate frames intermediate frames foundation trestle 6 movably in a front and rear direction of the knitting machine, or left and right direction of paper face of Fig. 1. The pair ofintermediate frames - Upper portions of the front and rear
intermediate frames shafts shafts cam shafts - An explanation will be given of a mechanism for moving the front base table 5a and the rear base table 5b, in the front and rear direction to be remote from each other and proximate to each other; in other words a mechanism for moving the
intermediate frames - The front base table 5a and rear base table 5b are supported movably in the front and rear direction in a manner as;
guides linear guides foundation trestle 6. Meanwhile,screw shafts foundation trestle 6, at required locations in the width direction of the knitting machine. Thescrew shafts bearings foundation trestle 6. Thescrew shafts - Bevel gears 14a and 14b are respectively fixed to an end portion of the
front screw shaft 11a, which projects frontward from the front base table, and an end portion of therear screw shaft 11b, which projects rearward from the rear base table. Thebevel gears bevel gears power transmission shafts power transmission shafts motors 17a, 17b for driving, via some power transmission mechanisms in accordance with situation. That is, thescrew shafts bevel gears power transmission shafts motors 17a, 17b. Consequently, the front base table 5a and the rear base table 5b are respectively moved linearly in the front and rear direction of the knitting machine in proportion to the rotation. - The
motor 17a, 17b are respectively driven as properly controlled by move-wise control signals from a not-illustrated control unit so that the move the front base table 5a and the rear base table 5b are controlled. - In an illustrated example, the front and
rear screw shafts intermediate frames rear screw shafts screw shafts screw shafts -
Numeral 18 designates a plurality of yarn guide bars for respectively guiding yarns for forming front and rear webs and connecting yarns. Each of the yarn guide bars 18 is provided withyarn guiding needles 18a at distal end thereof, in correspondence with thefront knitting needles 1a or therear knitting needles 1b. The yarn guide bars 18 are front-rear wise arrayed or overlapped, at above a knitting area consisting of theknitting needles -
Numeral 20 designates a guide-bar swinging element comprising an arcuate shaped mountingbrace 21 to which each of the yarn guide bars 18 is attached and alink 22 extended upward from the mountingbrace 21. Each of the yarn guide bars 18 is displaceable in its longitudinal direction because apin 19 is projected from an inverse-T shaped mountingstrip 18b located on top of theguide bar 18 and is attached to the mountingbrace 21 through a not-illustrated stroke bearing. In this way, predetermined shogging motion may be imparted to the guide bar at a side part on the knitting machine. - At above the knitting area, the guide-
bar swinging element 20 is connected to a supportingbody 23, such as a traverse, which is extended in the width direction of the knitting machine, via guide-bar swinging mechanism 24 to be mentioned later. As schematically shown in Fig. 4, the guide-bar swinging mechanism 24 imparts swinging along a straight line in the front and rear direction orthogonal to rows of the front andrear knitting needles yarn guiding needles 18a at distal ends of the yarn guide bars 18. Normally, a plurality of the guide-bar swinging elements 20 are distributed in the width direction of the knitting machine to be spaced go away from each other at predetermined intervals. Onto the plurality of guide-bar swinging elements 20, each of the yarn guide bars 18 is attached. - The guide-
bar swinging mechanism 24 may be embodied in various manners other than the above-described, and may imparts, for example, a motion along an arcuate line, to the guide bars. Nevertheless, in the first embodiment, a swinging motion along a straight line is imparted. - A
linear guide 25 is attached as a slide support, onto a lower face of the supportingbody 23 having a section in a rectangle shape so that the linear guide is arranged in the front and rear direction or width direction of the supportingbody 23. A lower portion of thelinear guide 25 is widened in its cross section. Anupper end portion 22a of thelink 22 of the guide-bar swinging element 20 is supported by and engaged with thelinear guide 25 as to be able to slide in the front and rear direction relative to thelinear guide 25 and as not to come off downward. - For driving the guide-
bar swinging element 20, one end portion of a connectingstrip 27 is attached as hinged to a portion of thelink 22; and other end portion of the connectingstrip 27 is connected to and hung from a lower end portion of anactuator lever 29, which is supported by and hinged on ahinging support shaft 28, through a pin as a connecting element. Anactuator piece 32 is attached, through aneccentric cam mechanism 31, to anactuator shaft 30 that is arranged in the width direction of the knitting machine at inside of the supportingbody 23. Aprojection 32a of theactuator piece 32 is projected through anopening 33 opened at a side face of the supportingbody 23 and is coupled to a middle portion of theactuator lever 29 through apin 34 as a connecting element. - Thus, the guide-
bar swinging element 20 is displaced in the front and rear direction by front-rear-wise motion of theprojection 32a accompanied with rotation of theactuator shaft 30. The front-rear-wise motion causes swinging of theactuator lever 29 around thehinging support shaft 28 and then moving the connectingstrip 27 as to cause such displacement of the guide-bar swinging element 20. - Normally, the
actuator shaft 30 is controlled to rotate in synchronism with operation of the knitting machine. For example, when amotor 35 for driving is connected to an end portion of theactuator shaft 30 as shown by Fig. 2, themotor 35 is pertinently controlled by a control signal from the control unit to thereby control the rotation of theactuator shaft 30. - In otherwise, the
actuator shaft 30 may be controlled as in an example shown in Fig. 3. Apulley 36 is attached on an end of theactuator shaft 30. A power transmission belt, which is preferably a timing belt, is wound around between thepulley 36 and anotherpulley 38 that is attached on thecamshaft camshaft camshaft actuator shaft 30. - In following, an explanation will be given to a manner of knitting the three-dimensional warp knitted fabric having varied cross-sections, by use of the fabricating apparatus of the first embodiment.
- Notation "A" in Fig. 1 designates a three-dimensional warp knitted fabric having varied cross-sections which is being knitted. When the knitting machine is in operation, the
knitting needles bar swinging element 20 thereabove carries out guide-swinging movement in the front and rear direction in synchronism with the knitting movement by being driven by theactuator shaft 30 in the guide-bar swinging mechanism 24. The guide-swinging movement is carried out particularly by thelinear guide 25 in the guide-bar swinging mechanism 24. The respective yarn guide bars 18 attached to the guide-bar swinging element 20 moves along a straight line in the front and rear direction orthogonal to the rows of front andrear knitting needles - When knitting the three-dimensional warp knitted fabric A, the control unit sends control signals in accordance with a shaping or conformation of the knitted fabric A, to the
motor 17a, 17b for respectively driving the front andrear screw shafts screw shafts intermediate frames rear knitting needles knitting needles - Moving directions and moving distances of the two
intermediate frames knitting needles rear knitting needles rear knitting needles knitting needles - This enables changing of dimension between the front and rear webs, that is, a thickness and/or convexo-concave patterns on surfaces of the front and rear web a1, a2. Thus, as shown by Fig. 9 through Fig. 11, the three-dimensional warp knitted fabric "A" having symmetric or asymmetric varied cross sections in knitting direction may be fabricated, in same manner with conventional or normal three-dimensional warp knitted fabric.
- For example, the positions or the interval of the front and
rear knitting needles rear knitting needles rear knitting needles - In the above, the respective yarn guide bars 18 attached to the guide-bar swinging elements carry out guide-bar swinging movement along a straight line in the front and rear direction orthogonal to the rows of front and
rear knitting needles rear knitting needles yarn guiding needles 18a on distal end of theyarn guide bar 18 are kept constant when passing the yarns between them. Thus, it is facilitated to fabricate the three-dimensional warp knitted fabrics in which the dimension between the front and rear webs, that is, thickness are varied, or in which the convexo-concave patterns on surfaces are varied. - Fig. 5 through Fig. 7 show a second embodiment of the invention-wise apparatus for fabricating three-dimensional warp knitted fabric having varied cross sections. Fig. 5 thereamong is a side sectional view showing an outline of a double-raschel machine constituting the fabricating apparatus. Fig. 6 is a sectional view taken along a line VI-VI of the same, and Fig. 7 is a sectional view taken along line VII-VII of the same.
- The apparatus of the second embodiment is modified from that of the first embodiment in respect of the guide-
bar swinging mechanism 24 that imparts swinging movement to the guide-bar swinging element 20 holding the every yarn guide bars 18. - In this embodiment, other basic structure or mechanisms are same such as mechanism for moving the
intermediate frames knitting needles - According to the guide-
bar swinging mechanism 24 of the apparatus of the second embodiment, a supportingarm 40 extended in either of the front and rear direction is fixed at a lower face of the supportingbody 23 that has a rectangular cross section and is located at above the knitting area. Moreover, a first supportingshaft 41 and a second supportingshaft 42 respectively extended in the width direction of the knitting machine are rotatably inserted, viabearings arm 40 in respect of its extending direction; and the first and second the direction of extending of the supportingarm 40 supportingshafts - Meanwhile, the guide-
bar swinging element 20 comprises the arcuate-shaped mountingbrace 21 and a connectingarm 45 that is connected to the mountingbrace 21 and is bent and extended in a direction same as that of the supportingarm 40 in either of the front and rear direction. The connectingarm 45 is spaced go away from the supportingarm 40 as located on a slightly lower side thereof. In the case of the drawing, the connectingarm 45 bends at a middle portion thereof to constitute substantially V-like shape in view from a side direction of the knitting machine. The bent portion and a distal end portion of the connectingarm 45 are pivotably arranged with a first swingingshaft 46 and asecond swinging shaft 47, which are rotatable about axes in parallel with the first supportingshaft 41 and the second supportingshaft 42. - The supporting
arm 40 and the connectingarm 45 are combined as to jointly form a four-shafts link mechanism, by which the first supportingshaft 41 and the first swingingshaft 46 are connected by afirst link member 48 and the second supportingshaft 42 and the second swingingshaft 47 are connected by asecond link member 49. - At least one of the first and
second link members first link member 48 is connected to the first supportingshaft 41. The supportingshaft 41 is driven to rotate in clockwise and anti-clockwise direction within a required angle. Then, thefirst link member 48 is pivoted in the front and rear direction of the knitting machine centering on the supportingshaft 41; in accordance therewith, thesecond link member 49 is pivoted centering on the second supportingshaft 42. The connectingarm 45 and therefore, the guide-bar swinging element 20 pivots to be displaced in the front and rear direction of the knitting machine in synchronism with the knitting operation of the knitting machine. - In respect of the guide-
bar swinging element 20, a moving range or distance of a pivoting displacement and a manner of moving are easily modified or selected by adjusting: a rotational angle of the first supportingshaft 41; positions or an interval of the first and second supportingshafts 41 42 on the supportingarm 40; positions and an interval of the first and second swinging shafts on thearm 45; lengths of the first andsecond link members bar swinging element 20 and therefore, the respective yarn guide bars 18 attached and held thereby may be moved substantially along a straight line substantially in the horizontal state. - For clockwise or anticlockwise rotating of the first supporting
shaft 41, in a case shown by Fig. 5 and Fig. 6, alever 50 is fixed to the supportingshaft 41; a connectingrod 51 axially supported by and connected to thelever 50 is connected to thecam shaft 8a of the knitting machine; and the first supportingshaft 41 may rotate clockwise or anticlockwise by required angles in accordance with rotation of thecam shaft 8a as its rotation causes moving of the connectingrod 51 in the up and down direction and then motion is transmitted through alever 50 to the first supportingshaft 41. - For driving of clockwise or anticlockwise rotation of the first supporting
shaft 41, he lever 50 and the connectingrod 51 may be omitted so that the first supportingshaft 41 may be driven to rotate clockwise or anticlockwise directly by driving unit such as a servomotor (not illustrated). - Also in the case of the fabricating apparatus according the second embodiment, similar to the case of the first embodiment, the
knitting needles bar swinging element 20 thereabove carries out movement of pivoting to displace in the front and rear direction of the knitting machine in response of clockwise or anticlockwise rotating of the first supportingshaft 41 in the guide-bar swinging mechanism 24, through working of the 4 shafts link mechanism constituted by the supportingarm 40, thearm 45, the first and second supportingshafts shafts bar swinging element 20 carry out guide-bar swinging movement in the front and rear directions substantially orthogonal to the rows of front andrear knitting needles - In course of the knitting operation, the positions and/or the interval of the front and
rear knitting needles intermediate frames rear knitting needles - Fig. 8A and Fig. 8B show a specific example for keeping each of the
yarn guiding needles 18a substantially at centers between one and next one of theknitting needles yarn guiding needles 18a, as to cope with variation in the positions and/or the interval of the front andrear knitting needles - In the figure, numeral 55 designates a displacement generating device for imparting a displacement in the width direction of the knitting machine, or shogging movement, to the yarn guide bars 18 from one side portion of the knitting machine, in accordance with a knitting pattern. The
displacement generating apparatus 55 is provided with a plurality of pairs of connectingpins 57 that are moved forward and rearward respectively by not-illustrated ball screws andservomotors 56 in correspondence with the respective yarn guide bars 18. An attaching member 58 is disposed on distal ends of each pair of the connectingpins 57; and the attaching member 58 is connected through arod 59, torespective mounting strip 18b in the inverse-T shape arranged on an end portion of respective one of theyarn guide bar 18. Required displacement is imparted to eachyarn guide bar 18 by driving of therespective servomotor 56. - In the above, when the
rod 59 is positioned to be parallel with a longitudinal direction of the guide bars therod 59 is inclined on guide-bar swinging movement by an amount of, for example, a width and thus is brought into a state of Fig. 8B, if theyarn guiding needles 18a on the yarn guide bars 18 are disposed substantially at equidistance from twosuccessive knitting needles rod 59, a position of theyarn guide bar 18 is deviated in the longitudinal direction of the guide bar by an amount of a dimension "C" on the figure. The larger the swinging width of the guide bar, the larger becomes such shift. - Therefore, when the interval between the front and
rear knitting needles yarn guiding needles 18a are shifted from substantially the centers between the twoknitting needles - Hence, the knitting is carried out such that in correspondence with the deviation in the positions and/or the interval of the front and
rear knitting needles servomotor 56 is driven as controlled to cancel the positional deviation, by pertinent control signals from the control unit. Swinging positions of theyarn guiding needles 18a on the respective yarn guide bars 18 are disposed substantially at the centers between the twosuccessive knitting needles rear knitting needles - In the illustrated embodiments, an explanation has been given of the case of forming the knitting needle rows by the front and
rear knitting needles yarn guide bar 18 swing in the front and rear direction. Nevertheless, the concept of the fabricating method according to the invention may be embodied in knitting the three-dimensional warp knitted fabric such as: in the case in which the front andrear knitting needles - A knitting system or a mechanism therefore may be constructed as follows within compass of the invention. At least one piece or more of the front knitting needle and at least one of the rear knitting needle is able to carry out the knitting. For at least part of the front and rear knitting elements, members including piezoelectric elements or the like are used and controlled for fabricating the three-dimensional warp knitted fabric of the invention.
- As described above, according to the fabricating method and the fabricating apparatus of the invention, it is facilitated to produce the three-dimensional warp knitted fabrics having the varied cross sections. In particular, it is facilitated to produce those having variations in knitting direction in respect of thickness or convexo-concave patterns on the surfaces.
- The three-dimensional warp knitted fabric provided in this way is excellent in ornamental appearance or fanciness as a result of varying in the thickness or convexo-concave patterns on the surfaces. In addition, elasticity, pressure resistance or the other property may be changed locally on the fabric. Thus, invention-wise fabric may be suitably used on interior goods, sheets, cushions and the like.
Claims (7)
- A method for fabricating a three-dimensional warp knitted fabric having varied cross sections, by use of a double-raschel machine that is comprised of:front and rear knitting needles (1a, 1b); front and rear knitting-elements supporting bodies (4a, 4b; 5a, 5b) for respectively supporting front and rear knitting elements (1a, 1b; 2a, 2b; 3a, 3b) including the front and rear knitting needles; a mechanism (11a, 11b; 13a, 13b; 15a, 15b; 17a, 17b) for moving the front and rear knitting-elements supporting bodies move in a front-rear direction to come close to or go away from each other; control unit for providing control signals to said mechanism for moving; and a plurality of yarn guide bars (18) for guiding yarns for forming front and rear webs (a1, a2) and connecting yarns; andthe yarns being fed from the yarn guide bars (18) to the front and rear knitting needles (1a, 1b) so that the front and rear webs (a1, a2) are formed and simultaneously connected by the connecting yarns on proceeding of knitting; whereinon the proceeding of the knitting, positions of and/or an interval between the front and rear knitting needles (1a, 1b) are varied by said mechanism for moving (11a, 11b; 13a, 13b; 15a, 15b; 17a, 17b), so that convexo-concave patterns on surfaces of the front and rear webs and/or a dimension between the front and rear webs are varied in the three-dimensional warp knitted fabric knitted in a single continuous knitting process.
- A method for fabricating a three-dimensional warp knitted fabric having varied cross sections according to Claim 1, wherein the front knitting needles (1a) along with the front knitting-elements supporting bodies (4a, 5a) are moved as controlled separately, to the rear knitting needles (1b) along with the rear knitting-elements supporting bodies (4b, 5b), so that cross sections are symmetrical or asymmetrical between front and rear surfaces in the three-dimensional knitted fabric.
- A method for fabricating a three-dimensional warp knitted fabric having varied cross sections according to Claim 1 or 2, said double-raschel machine further comprising a guide-bar swinging element (20) for holding the yarn guide bars (18), wherein, on proceeding of the knitting, the guide-bar swinging element is moved to swing the guide bars in the front-rear direction by guide-bar swinging mechanism (24) connected to a supporting body above a knitting area; and a position of the guide-bar swinging element (20) is controlled such that a position of swinging a yarn guiding needle (18a) at a distal end of the yarn guide bar is disposed substantially at a center between the two contiguous knitting needles, in response to varying in positions of and/or an interval between the front and rear knitting needles (1a, 1b).
- An apparatus for fabricating a three-dimensional warp knitted fabric having varied cross sections, formed of a double-raschel machine, comprising:front and rear knitting needles (1a, 1b); front and rear knitting-elements supporting bodies (4a, 4b; 5a, 5b) for respectively supporting front and rear knitting elements (1a, 1b; 2a, 2b; 3a, 3b) including the front and rear knitting needles; a mechanism (11a, 11b; 13a, 13b; 15a, 15b; 17a, 17b) for moving the front and rear knitting-elements supporting bodies move in a front-rear direction to come close to or go away from each other; control unit for providing control signals to said mechanism for moving; and a plurality of yarn guide bars (18) for guiding yarns for forming front and rear webs (a1, a2) and connecting yarns;wherein said mechanism for moving (11a, 11b; 13a, 13b; 15a, 15b; 17a, 17b) is constructed to be able to vary positions and/or an interval of the front and rear knitting needles (1a, 1b) on receiving of the control signals from the control unit, while proceeding of the knitting.
- An apparatus for fabricating a three-dimensional warp knitted fabric having varied cross sections according to Claim 4, wherein said mechanism for moving (11a, 11b; 13a, 13b; 15a, 15b; 17a, 17b) is constructed such that the front knitting-elements supporting bodies (4a, 5a) are moved as controlled separately, to the rear knitting-elements supporting bodies (4b, 5b).
- An apparatus for fabricating a three-dimensional warp knitted fabric having varied cross sections according to Claim 4 or 5, further comprising a guide-swinging element (20) for holding the yarn guide bars (18);
wherein the guide-swinging element (20) imparts swinging movement substantially along a straight line in the front-rear direction relative to the front and rear knitting needles (1a, 1b), to distal-end part of the yarn guide bars (18) to swing the guide bar substantially linearly in the front and rear direction, by guide-bar swinging mechanism (24) interposed between the guide-bar swinging element (20) and a supporting body (23) above a knitting area. - A three-dimensional warp knitted fabric having varied cross sections (A) fabricated by the method according to anyone of Claims 1 through 3, wherein convexo-concave patterns on surfaces of the front and rear webs (a1, a2) and/or a dimension between the front and rear webs are varied in the knitting direction.
Priority Applications (2)
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ES04024758T ES2371248T3 (en) | 2004-10-18 | 2004-10-18 | PROCEDURE AND APPARATUS FOR THE MANUFACTURE OF A THREE-DIMENSION FABRIC OF THREADED URDIMBRE WITH VARIABLE CROSS SECTIONS. |
EP04024758A EP1647619B1 (en) | 2004-10-18 | 2004-10-18 | Method and apparatus for fabricating a three-dimensional warp knitted fabric having varied cross-sections |
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EP04024758A EP1647619B1 (en) | 2004-10-18 | 2004-10-18 | Method and apparatus for fabricating a three-dimensional warp knitted fabric having varied cross-sections |
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EP1647619A1 true EP1647619A1 (en) | 2006-04-19 |
EP1647619B1 EP1647619B1 (en) | 2011-09-21 |
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EP04024758A Not-in-force EP1647619B1 (en) | 2004-10-18 | 2004-10-18 | Method and apparatus for fabricating a three-dimensional warp knitted fabric having varied cross-sections |
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Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102007047911A1 (en) | 2007-12-01 | 2009-06-10 | THÜMLING Textilmaschinen GmbH | Raschel machine and method for producing a spacer knitted fabric and knitted spacer fabric |
DE102008047684A1 (en) | 2008-09-18 | 2010-03-25 | Karl Mayer Textilmaschinenfabrik Gmbh | Knitter machine i.e. warp knitting machine, for producing interspaced knitted fabrics, has pile guide bars moveable back and forth in adjustment direction by levers, which have stroke height adjusted by control device |
CN101476210B (en) * | 2009-01-20 | 2010-12-01 | 常州市润源经编机械有限公司 | Warp let-off device of double rib warp loom |
CN101338486B (en) * | 2007-07-07 | 2011-04-06 | 卡尔迈尔纺织机械制造有限公司 | Warp knitting machine |
KR101028430B1 (en) * | 2008-08-29 | 2011-04-14 | 코오롱글로텍주식회사 | Method for fabricating tube-yarn using double raschel warp knitting |
CN102454026A (en) * | 2010-10-29 | 2012-05-16 | 苏州华龙针织品有限公司 | Needle plate fixing device |
CN102733065A (en) * | 2012-05-31 | 2012-10-17 | 常州市武进五洋纺织机械有限公司 | Two-needle bed warp knitting machine with needle bed crankshaft connecting rod mechanism |
CN102733078A (en) * | 2011-04-08 | 2012-10-17 | 利巴机械制造有限公司 | Raschel machine |
CN103835062A (en) * | 2014-03-04 | 2014-06-04 | 常熟市大发经编织造有限公司 | Stackable continuously-produced 3D warp-knitted mesh pad and weaving method thereof |
CN104032479A (en) * | 2014-06-30 | 2014-09-10 | 常州市第八纺织机械有限公司 | Yarn pressing plate transmission mechanism of electronic transverse moving multi-bar warp knitting machine |
CN104762746A (en) * | 2015-04-17 | 2015-07-08 | 卡尔迈耶(中国)有限公司 | Pattern guide bar yarn guide device of multi-guide-bar Raschel warp knitting machine |
CN104775230A (en) * | 2015-03-26 | 2015-07-15 | 桐乡市尤科斯纺织科技有限公司 | Two-layer composite fiber fabric and special production equipment thereof |
CN106245219A (en) * | 2016-10-26 | 2016-12-21 | 福建省鑫港纺织机械有限公司 | A kind of mounting means of jacquard warp knitting machine connecting rod rest |
US20170251825A1 (en) * | 2016-03-07 | 2017-09-07 | Purple Innovation, Llc | Mattresses and mattress toppers including knitted fabric, and related methods |
CN108018650A (en) * | 2018-01-05 | 2018-05-11 | 常州市赛嘉机械有限公司 | A kind of electronics amplitude of oscillation control method of width gauge double rib warp loom interval yarn sley bar |
KR102021606B1 (en) * | 2019-05-21 | 2019-09-16 | (유)이안지오텍 | High-intensity Lacelle Knitting Net Manufacturing Apparatus |
WO2020123221A1 (en) * | 2018-12-10 | 2020-06-18 | Nike Innovate C.V. | Knitting machine with adjustable needle beds and variable thickness knitted component |
CN115142186A (en) * | 2021-03-31 | 2022-10-04 | 卡尔迈耶斯托尔研发有限公司 | Knitting tool guide bar |
US20230078969A1 (en) * | 2017-10-02 | 2023-03-16 | Apple Inc. | Tubular Warp Knit Spacer Fabric |
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CN101338486B (en) * | 2007-07-07 | 2011-04-06 | 卡尔迈尔纺织机械制造有限公司 | Warp knitting machine |
EP2067887A1 (en) | 2007-12-01 | 2009-06-10 | Thümling Textilmaschinen GmbH | Warp knitting machine and method of making a spacer warp knit fabric as well as warp knit spacer fabric |
DE102007047911B4 (en) * | 2007-12-01 | 2009-12-10 | THÜMLING Textilmaschinen GmbH | Raschel machine and method for producing a spacer knitted fabric and knitted spacer fabric |
DE102007047911A1 (en) | 2007-12-01 | 2009-06-10 | THÜMLING Textilmaschinen GmbH | Raschel machine and method for producing a spacer knitted fabric and knitted spacer fabric |
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CN101676461B (en) * | 2008-09-18 | 2012-05-30 | 卡尔迈尔纺织机械制造有限公司 | Knitting machine, especially warp knitting machine |
DE102008047684A1 (en) | 2008-09-18 | 2010-03-25 | Karl Mayer Textilmaschinenfabrik Gmbh | Knitter machine i.e. warp knitting machine, for producing interspaced knitted fabrics, has pile guide bars moveable back and forth in adjustment direction by levers, which have stroke height adjusted by control device |
DE102008047684B4 (en) * | 2008-09-18 | 2016-12-15 | Karl Mayer Textilmaschinenfabrik Gmbh | Knitting machine, in particular warp knitting machine |
CN101476210B (en) * | 2009-01-20 | 2010-12-01 | 常州市润源经编机械有限公司 | Warp let-off device of double rib warp loom |
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CN102733078A (en) * | 2011-04-08 | 2012-10-17 | 利巴机械制造有限公司 | Raschel machine |
CN102733078B (en) * | 2011-04-08 | 2014-08-06 | 利巴机械制造有限公司 | Raschel machine |
CN102733065A (en) * | 2012-05-31 | 2012-10-17 | 常州市武进五洋纺织机械有限公司 | Two-needle bed warp knitting machine with needle bed crankshaft connecting rod mechanism |
CN103835062A (en) * | 2014-03-04 | 2014-06-04 | 常熟市大发经编织造有限公司 | Stackable continuously-produced 3D warp-knitted mesh pad and weaving method thereof |
CN104032479A (en) * | 2014-06-30 | 2014-09-10 | 常州市第八纺织机械有限公司 | Yarn pressing plate transmission mechanism of electronic transverse moving multi-bar warp knitting machine |
CN104775230A (en) * | 2015-03-26 | 2015-07-15 | 桐乡市尤科斯纺织科技有限公司 | Two-layer composite fiber fabric and special production equipment thereof |
CN104762746A (en) * | 2015-04-17 | 2015-07-08 | 卡尔迈耶(中国)有限公司 | Pattern guide bar yarn guide device of multi-guide-bar Raschel warp knitting machine |
US20170251825A1 (en) * | 2016-03-07 | 2017-09-07 | Purple Innovation, Llc | Mattresses and mattress toppers including knitted fabric, and related methods |
US11793322B2 (en) * | 2016-03-07 | 2023-10-24 | Purple Innovation, Llc | Mattresses and mattress toppers including knitted fabric and related methods |
CN106245219A (en) * | 2016-10-26 | 2016-12-21 | 福建省鑫港纺织机械有限公司 | A kind of mounting means of jacquard warp knitting machine connecting rod rest |
US20230078969A1 (en) * | 2017-10-02 | 2023-03-16 | Apple Inc. | Tubular Warp Knit Spacer Fabric |
CN108018650A (en) * | 2018-01-05 | 2018-05-11 | 常州市赛嘉机械有限公司 | A kind of electronics amplitude of oscillation control method of width gauge double rib warp loom interval yarn sley bar |
CN108018650B (en) * | 2018-01-05 | 2023-06-23 | 常州市赛嘉机械有限公司 | Electronic swing control method for spacer bar of wide-gauge double-needle bar warp knitting machine |
WO2020123221A1 (en) * | 2018-12-10 | 2020-06-18 | Nike Innovate C.V. | Knitting machine with adjustable needle beds and variable thickness knitted component |
US11299829B2 (en) | 2018-12-10 | 2022-04-12 | Nike, Inc. | Knitting machine with adjustable needle beds and variable thickness knitted component |
KR102021606B1 (en) * | 2019-05-21 | 2019-09-16 | (유)이안지오텍 | High-intensity Lacelle Knitting Net Manufacturing Apparatus |
CN115142186A (en) * | 2021-03-31 | 2022-10-04 | 卡尔迈耶斯托尔研发有限公司 | Knitting tool guide bar |
CN115142186B (en) * | 2021-03-31 | 2023-10-10 | 卡尔迈耶斯托尔研发有限公司 | Knitting tool bar |
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