EP0672769B1 - Flat bed knitting machine with movable yarn guide members - Google Patents
Flat bed knitting machine with movable yarn guide members Download PDFInfo
- Publication number
- EP0672769B1 EP0672769B1 EP95301744A EP95301744A EP0672769B1 EP 0672769 B1 EP0672769 B1 EP 0672769B1 EP 95301744 A EP95301744 A EP 95301744A EP 95301744 A EP95301744 A EP 95301744A EP 0672769 B1 EP0672769 B1 EP 0672769B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- needle
- knitting
- yarn
- yarn guide
- sinker
- 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.)
- Expired - Lifetime
Links
Images
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
- D04B15/32—Cam systems or assemblies for operating knitting instruments
- D04B15/36—Cam systems or assemblies for operating knitting instruments for flat-bed knitting machines
- D04B15/362—Cam systems or assemblies for operating knitting instruments for flat-bed knitting machines with two needle beds in V-formation
-
- 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
- D04B15/06—Sinkers
-
- 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
- D04B15/10—Needle beds
-
- 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
- D04B15/88—Take-up or draw-off devices for knitting products
- D04B15/90—Take-up or draw-off devices for knitting products for flat-bed knitting machines
Definitions
- the present invention relates to a flat-knitting machine, more particulaly, to a flat-knitting machine incorporating a plurality of movable yarn guide members respectively capable of guiding knitting yarns fed to tip portions of needle heads up to predetermined positions of knitting needles.
- the flat knitting machine disclosed in the above European Patent Publication incorporates a pair of needle heads which are respectively disposed in the front and rear alignment and respectively incorporates a projectable and retractable compound needle by permitting tip portions of respective needle heads to come close to each other.
- Swingable sinkers are respectively held at the tip portion of the approaching needle heads.
- Each movable sinker has a hook portion for pressing a sinker loop and a guide surface for guiding a knitting yarn fed to upper portion of the pressing hook up to a predetermined position of a knitting needle.
- Each sinker is arranged to swing itself by means of a cam unit of carriage.
- each movable sinker having guide surface for guiding a knitting yarn provided for the flat knitting machine described in the above Europearn Patent Publication is compulsorily driven for swinging, when sinker loops have different sizes for example, operator needs to adjust swingable amount of the movable sinker in correspondence with actual size of minimum loop.
- the Applicant of the present Invention further proposed a flat-knitting machine having an energizing means for pressurizing sinker loops (provided for each sinker-loop pressing hook of each moveable sinker) in the direction of pressing the sinker loops.
- the proposed mechanism was conceived to press sinker loops via substantially constant tension using elastic energizing force of the energizing means even when sinker loops have different sizes.
- the movable sinkers cannot swing themselves for a substantial amplitude in that pressing amount is preset in order that sinker loops cannot be cut off even when the sinker loops pressed by the sinker-loop pressing hook portion are quite small while the movable sinkers are compulsorily driven for swinging by carriages, and in that, since the guide surface is formed on the sinker-loop pressing hook portion, when each movable sinker on one of a pair of needle beds set in the front and back alignment with their tip portions being close to each other is subjected to swinging for a substantial amplitude, the swinging movable sinker interferes with a movable sinker on the other needle bed or the tip portion of the other needle bed, thus raising problem.
- a sinker mechanism for flat bed knitting machines is disclosed in European Patent Application No. 0578458 (Application No. 93305233.4) which comprises a row of sink assemblies, each sink assembly comprising a needle plate, a swingable sinker next to a front region of a needle plate, and a yarn guide sheet fixedly mounted to a needle bed.
- the swingable sinker has at a front end a yarn holding portion and the yarn guide has at a front end a yarn guide edge.
- the yarn guide edge of the yarn guide sheet comes above the yarn holding portion of the swingable sinker and projects outwardly of the front end of the sinker towards the intermediate position between the front end of the opposed needle bed.
- the invention has thus been proposed to fully solve the above problems.
- the object of the invention is to provide an improved flat-knitting machine capable of correctly pressing sinker loops with optimum tension and guiding supplied knitting yarns into hooks.
- the improved flatknitting machine incorporating movable yarn guide members comprises:
- each needle plate is thinly formed, semispherical supporting recess is formed in thick lower half portion substantially at the middle of the thinly formed lateral surface thereof, a rotary support member of a movable sinker is engaged with the semispherical supporting recess, each yarn guiding member is slidably positioned at lateral portion of the rotary support member, and a knitting needle is stored in slit-like space formed below a needle plate spacer at the lower half portion of lateral surface of the needle plate.
- cam groove of a control cam is formed in order that each yarn guide member will not overrun the center line of teeth apertures of the needle beds provided in the front and rear alignment when the yarn guide members are driven to the farthest position.
- cam groove of a control cam is formed so that the tip of the yarn guide member retreats to a position free from causing interference with yarn supply aperture while yarn supply aperture of a yarn feeder passes therethrouth only when the yarn guide member is driven in the forward direction.
- the movable sinker is properly driven for swinging by a sinker-cam to cause sinker loops to be pressed against a sinker-loop pressing hook portion.
- yarn guide members and knitting needles are driven in the forward direction by a predetermined amount by cams of a carriage.
- tip portion of the slider is at a position without projecting itself from guide surface portion of the yarn guide members towards hook portion. Since each of supplied knitting yarns is securely delivered to the hook after being guided through the guide surface, the knitting yarns can proceed linearly without being caught by the slider used for closing hook of each knitting needle.
- the cam groove of the control cam is so formed that the yarn guide members can be prevented from overrunning the center line of teeth apertures of the needle beds disposed in the front and rear alignment when the guide members are driven to the farthest position, the front and rear needle beds can be shifted relatively without causing the yarn guide members of the front and rear needle beds to interfere with each other.
- each yarn guide member is so formed that it can retract itself while the proceeding yarn guide member passes through yarn supply aperture of a yarn feeder, the yarn supply aperture of the yarn feeder remains free from coming into contact with the yarn guide member.
- Fig. 1 is a lateral view representing schematic structure of fundamental components of the improved flat-knitting machine according to the invention, in which the reference numeral 1 designates an overall view of the improved flat-knitting machine.
- the improved flat knitting machine 1 incorporates a plurality of needle plates 3 shown in Fig. 2 which are respectively installed above corresponding needle beds 2 at equal intervals.
- a plurality of compound-needle type knitting needles 4 and yarn guide members 5 shown in Fig. 3 are installed in parallel between the needle plates 3 and 3 by way of individually capable of projecting and retracting themselves.
- the needle beds 2 are disposed in opposition from each other in the " ⁇ " shaped formation via lateral view as of the condition in which tip portions of the knitting needles 4 are close to each other.
- a plurality of movable sinkers 7 respectively being swingable by a carriage 6 are disposed at the tip portions of the needle beds 2.
- Space T is formed between tip ends of the needle plates 3 and 3 through which knitting needles 4 of the needle beds 2 and the yarn guide members 5 are projectively and retractably operated by the corresponding carriages 6.
- Fig. 4 schematically illustrates a cam group of a carriage 6 for projecting and retracting knitting needles 4 of a needle head 2 and swinging a plurality of movable sinkers 7.
- the reference numeral 8 shown in Fig. 4 designates a knitting cam, 9 a rear cam for controlling sinkers disposed in front of the knitting cam 8, 10 a front cam for controlling sinkers disposed in front of the rear cam 9, and the reference numeral 11 desisnates a control cam for projecting and retracting yarn guide members 5.
- the sinker-controlling front cam 10 consists of a cam profile 12 formed below a piece of plate.
- the sinker-controlling rear cam 9 comprises a pair of rotatable cams 13a and 13b disposed to the left and to the right of a piece of plate which forms a cam profile 13 on the bottom surface of the rear cam 9 and a connection rod 17 which causes either of the rotatable cams 13a and 13b of movable sinkers 13a and 13b to retract when the other cam 13a or 13b projects.
- a sliding cam 13c is provided between the rotatable cams 13a and 13b.
- the sinker-controlling front cam 10 and rear cam 9 are respectively secured to a bracket 14 projecting from the carriage 2 via bolts 15 and 16.
- the sliding cam 13c shifts itself to downstream side in the carriage moving direction as soon as it comes into contact with a contact portion 25b of a rear cam of a movable sinker.
- the rotatable cam 13a is forwardly operative, whereas the other cam 13b is backwardly operative.
- the knitting cam 8 comprises a needle-raising cam 19, a crown member 20 disposed in the center tip of the needle-raising cam 19, a pair of gradational members 21 and 21 which are slidably disposed along both sides of the crown member 20, and a control groove 23 formed between the needle-raising cam 19, the crown member 20, and the gradational members 21 and 21 to permit butts 22 of respective knitting needles 4 to pass therethrough.
- the butt 22 of individual knitting needle 4 is controlled by the knitting cam 8.
- the needle plates 3 are respectively secured to the upper surface of the needle bed 2.
- a hook 4a at the tip of each knitting needle 4 is slidably disposed between the needle plates 3, 3, 3 ⁇ so that the hook 4a can externally project from the tip of the needle bed 2 and retract itself.
- individual butt 24a of a slider 24 is operated by a slider control cam (not shown) in association with projecting and retracting movements of each knitting needle 4, the slider 24 opens and closes the hook 4a.
- a plurality of ship-shaped (plane view) blades are provided on a side of respective knitting needles 4 in order to expand loops.
- a plurality of needle-plate spacers 18 are respectively set above individual knitting needles 4 and yarn guide members 5 secured between the needle plates 3, 3, 3.
- the movable sinker 7 comprises a thinly formed sinker plate 25 having the front being bent by way of circular arc and a sinker-loop pressing hook portion 27 formed on the part of the tip of the sinker plate 25.
- Front-cam contact portion 25a permitting contact of the sinker-controlling front cam 10 therewith is formed slightly behind the sinker-loop pressing hook portion 27.
- a spring holder 30 is formed near the front-cam contact portion 25a in order to secure an end of a substantially U-shaped linear spring (elastically energizing member) 29 which downwardly presses to energize the sinker-loop pressing portion 27.
- a rotation support portion 31 is formed below the spring holder 30 of the sinker plate 25 by way of semicircularly projecting itself.
- Rear-cam contact portion 25b permitting contact of the rear cam 9 therewith is formed at the rear end of the sinker plate 25.
- Each of the needle plate spacers 18 is formed with a thinly formed steel sheet.
- Coupling recesses 46 coupled with respective rotary rods 45 held across the needle plates 3, 3, ⁇ are respectively formed in the rear end portion of the needle plate spacers 18.
- Central upper surface portion of each needle plate spacer 18 has such a shape analogous to the upper half portion of the needle plate 3 having a dovetailed coupling groove 37 to be described later on.
- each of the yarn guide members 5 has a guide surface 42 which is downwardly inclined in the oblique direction at the tip end of the main body 41 formed with a thinly formed narrow-width steel sheet.
- a slide guide member 40 accommodating a pair of grooves 43 formed in the upper and lower ranks for slidably being guided by the rotary rod 45 held across the needle plates 3, 3, ⁇ is formed at the rear end of the main body 41.
- Individual butt 44 is vertically set to the upper surface of the slide guide member 40, where each butt 44 is operated for projecting and retracting itself by the control cam 11 secured to the carriage 6.
- control cam 11 for causing each yarn guide member 5 to project and retract by operating the butt 44 incorporates a cam groove 48 for permitting the yarn guide member 5 to internally proceed and externally retreat at both ends and center portion thereof at intermediate height position of a cam plate 47.
- the rear-cam contact portion 25b of the movable sinker 7 is depressed by the movable cam 13a of the rear cam 9.
- the sinker plate 25 rotates counterclockwise in resistance against tension of the linear spring 29 by way of pivoting on the rotary member 31 coupled with the recess 33 to cause the sinker-loop pressing hook portion 27 at the tip portion of the sinker plate 25 to be positioned above the knitting needle 4A, thereby causing the movable cam 13a of the rear cam 9 to become no longer effective in acting on the rear cam contact portion 25b of the movable sinker 7.
- butt 44 of the movable yarn guide member 5 is retracted via cam groove 48 of the control cam 11, and as a result, tip end of the butt 44 becomes substantially flush with the tip end of the sinker plate 25 as shown in Fig. 8.
- each knitting yarn is delivered to the knitting needle 4 from the yarn feeder 50 at position C and then led below sliding locus of the slider 24 via the pronely inclined guide surface 42 at the tip of the yarn guide member 5. Knitting yarn is then deleivered to the yarn feeding aperture 50a and then securely led to inner space of the hook 4a of the knitting needle 4 (see Fig. 10).
- the slightly descending slider 24 closes the hook 4a holding the supplied knitting yarn.
- the loop (the former one) mounted on the upper surface of the slider 24 is knocked over in such a state in which both sides of the hook 4a are held between he lower portion of the guide surface 42 of the yarn guide member 5 and the upper portion of the guide surface 42 of the yarn guide member 5 and the upper portion of the sinker-loop pressing hook portion 27 of the movable sinker 7.
- the above embodiment has solely introduced a linear spring as energizing means for depressing and energizing the sinker-loop pressing hook portion.
- a linear spring as energizing means for depressing and energizing the sinker-loop pressing hook portion.
- the invention it is of course possible for the invention to form the energizing means with a coil spring in place of the linear spring.
- each sinker loop is depressed by energizing force of an elastically energizing means at sink-loop pressing hook portion of the movable sinker.
- the energizing means bends in the direction of loosening tension of the sinker loop to prevent the sinker loop from being elongated or torn off.
- the yarn guide member and an operating knitting needle are driven forward by a predetermined amount by cams of the carriage.
- tip end of the slider remains without projecting itself towards the hook from the guide surface of the yarn guide member at the yarn feeding position at which the hook of the slider of the knitting needle remain open. Since the supplied knitting yarn is guided via guide surface and securely delivered to the hook, kitting yarn can be prevented from piercing the slider linearly proceeding to close the hook of the knitting needle or from being caught by the slider. In consequence, the improved flat knitting machine can securely form a beautiful knit having well-prepared loop length.
- the cam groove of the control cam is formed so that the yarn guide member proceeded to the maximum extent can be prevented from overrunning the center line of teeth apertures of the needle beds disposed in the front and rear alignment, the front and rear needle beds can make shift relative to each other without causing the yarn guide members of the front and rear needle beds to interfere with each other, and yet, satisfactory knit composition can be maintained without spoiling proper function of the yarn guide member, thus providing additional advantage.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
Description
Claims (4)
- A flat knitting machine incorporating movable yarn guide members comprising:at least a pair of needle beds (2) disposed in front and rear alignment;a plurality of needle plates (3) provided for each needle bed at equal intervals;wherein the at least pair of needle beds are disposed in front and rear alignment so that said tip portions of the needle plates are close to each other;a plurality of knitting needles (4) aligned in parallel between the needle plates;wherein the knitting needles are compound needles in which sliders are projected and retracted via a carriage (6);a plurality of movable sinkers (7) each of which is swingably held at a position close to a tip end of each needle plate (3) and is provided with an elastically energizing member (29) for generating energizing force by which a knitting yarn held in knitting-yarn pressing portion (27) formed at tip portion of each movable sinker (7) is energized in the direction of pressing knitting yarn; characterized in that:a yarn guide member (5) is provided between a needle plate (3) and a knitting needle (4), wherein each yarn guide member is slidably disposed so that a guide surface (42) formed at the tip thereof can project and retract itself from the tip of each needle bed (2); andan operating member (44) is provided at rear-end portion of each yarn guide member and projecting and retracting by a control means (11) secured to a carriage (6).
- A flat knitting machine incorporating movable yarn guide members (5) as claimed in claim 1, wherein
upper half of lateral surface close to the tip of each needle plate (3) is thinly formed, semi-spherical supporting recess (33) is formed in thick lower half portion substantially at the middle of the thinly formed lateral surface thereof, a rotary support member (31) of a movable sinker (7) is engaged with the semi-spherical supporting recess, each yarn guiding member is slidably positioned at lateral portion of the rotary support member, and a knitting needle (4) is stored in slit-like space formed below a needle plate spacer (18) at the lower half portion of lateral surface of the needle plate. - A flat knitting machine incorporating movable yarn guide members (5) as claimed in claim 1 or 2, wherein
cam groove (48) of a control cam (11) is formed in order that each yarn guide member will not overrun the centre line of teeth apertures of the needle beds (2) provided in the front and rear alignment when the yarn guide members are driven to the farthest position. - A flat knitting machine incorporating movable yarn guide members (5) as claimed in claim 1, 2 or 3, wherein
cam groove (48) of a control cam (11) is formed so that the tip of the yarn guide member retreats to a position free from causing interference with yarn supply aperture (50a) while yarn supply aperture of a yarn feeder (50) passes therethrough only when the yarn guide member is driven in the forward direction.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP49196/94 | 1994-03-18 | ||
JP04919694A JP3333304B2 (en) | 1994-03-18 | 1994-03-18 | Weft knitting machine with movable yarn guide member |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0672769A1 EP0672769A1 (en) | 1995-09-20 |
EP0672769B1 true EP0672769B1 (en) | 1998-05-20 |
Family
ID=12824258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95301744A Expired - Lifetime EP0672769B1 (en) | 1994-03-18 | 1995-03-16 | Flat bed knitting machine with movable yarn guide members |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0672769B1 (en) |
JP (1) | JP3333304B2 (en) |
DE (1) | DE69502524T2 (en) |
TW (1) | TW297413U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101091011B (en) * | 2004-12-28 | 2010-12-01 | 株式会社岛精机制作所 | Weft knitting machine with movable sinker |
CN101278086B (en) * | 2005-09-28 | 2010-12-08 | 株式会社岛精机制作所 | Weft knitting machine having movable yarn guide |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3498280B2 (en) * | 1996-05-15 | 2004-02-16 | 株式会社島精機製作所 | Yarn guide device in flat knitting machine |
DE19806548A1 (en) * | 1998-02-17 | 1999-08-19 | Schieber Universal Maschf | Flatbed knitter with comb sinkers at the needle bed |
DE19807695A1 (en) * | 1998-02-24 | 1999-08-26 | Stoll & Co H | Process for producing a knitted fabric on a flat knitting machine |
EP1467010B1 (en) * | 2003-04-11 | 2006-06-21 | H. Stoll GmbH & Co. | Flat knitting machine having at least two needle beds |
KR101024209B1 (en) | 2003-07-30 | 2011-03-23 | 가부시키가이샤 시마세이키 세이사쿠쇼 | Weft knitting machine having movable sinker |
DE50309083D1 (en) * | 2003-10-07 | 2008-03-13 | Stoll & Co H | Flat knitting machine with at least one needle bed |
JP4176038B2 (en) * | 2004-03-31 | 2008-11-05 | 株式会社島精機製作所 | Movable sinker device of flat knitting machine |
WO2008018185A1 (en) * | 2006-08-11 | 2008-02-14 | Shima Seiki Mfg., Ltd. | Movable sinker and weft knitting machine |
JP4237821B1 (en) * | 2007-07-30 | 2009-03-11 | 株式会社島精機製作所 | Knitting method of knitted fabric and flat knitting machine |
JP5757830B2 (en) * | 2011-09-13 | 2015-08-05 | 株式会社島精機製作所 | Flat knitting machine provided with compound needle, and slider control method of flat knitting machine |
EP2570532A1 (en) * | 2011-09-16 | 2013-03-20 | Pai Lung Machinery Mill Co., Ltd. | Sinker control apparatus for flat knitting machines |
CN102995274B (en) * | 2011-09-19 | 2014-09-24 | 佰龙机械厂股份有限公司 | Sinker control device for transverse knitter |
US11639566B2 (en) * | 2019-02-27 | 2023-05-02 | Pai Lung Machinery Mill Co., Ltd. | Method for knitting three-dimensional fabric with variable thickness through a flat knitting machine |
US11313058B2 (en) * | 2019-02-27 | 2022-04-26 | Pai Lung Machinery Mill Co., Ltd. | Flat knitting machine structure with adjustable gap between two knock-over bits |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR0123800B1 (en) * | 1989-12-28 | 1997-11-27 | 마사히로 시마 | Sinker mechanism for knitting machine |
JPH03234847A (en) * | 1990-02-09 | 1991-10-18 | Shima Seiki Seisakusho:Kk | Movable sinker in weft knitting machine |
JP2618312B2 (en) * | 1992-07-09 | 1997-06-11 | 株式会社島精機製作所 | Sinker device in flat knitting machine |
-
1994
- 1994-03-18 JP JP04919694A patent/JP3333304B2/en not_active Expired - Fee Related
-
1995
- 1995-03-14 TW TW085203135U patent/TW297413U/en unknown
- 1995-03-16 EP EP95301744A patent/EP0672769B1/en not_active Expired - Lifetime
- 1995-03-16 DE DE69502524T patent/DE69502524T2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101091011B (en) * | 2004-12-28 | 2010-12-01 | 株式会社岛精机制作所 | Weft knitting machine with movable sinker |
CN101278086B (en) * | 2005-09-28 | 2010-12-08 | 株式会社岛精机制作所 | Weft knitting machine having movable yarn guide |
Also Published As
Publication number | Publication date |
---|---|
DE69502524D1 (en) | 1998-06-25 |
JPH07258946A (en) | 1995-10-09 |
TW297413U (en) | 1997-02-01 |
EP0672769A1 (en) | 1995-09-20 |
JP3333304B2 (en) | 2002-10-15 |
DE69502524T2 (en) | 1998-09-10 |
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