US3609997A - Warp knitting machine - Google Patents
Warp knitting machine Download PDFInfo
- Publication number
- US3609997A US3609997A US854974A US3609997DA US3609997A US 3609997 A US3609997 A US 3609997A US 854974 A US854974 A US 854974A US 3609997D A US3609997D A US 3609997DA US 3609997 A US3609997 A US 3609997A
- Authority
- US
- United States
- Prior art keywords
- weft
- thread
- thread guide
- knitting machine
- holder members
- 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
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Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B23/00—Flat warp knitting machines
- D04B23/12—Flat warp knitting machines with provision for incorporating unlooped wefts extending from selvedge to selvedge
Definitions
- My invention relates to warp knitting machines and especially to Raschel knitting machines.
- a warp knitting machine having a zone wherein knitting needles are disposed and 9 means for supplying warp threads to the needles which includes device for filling a weft having holder members for making the weft ready outside the needle zone, the holder members being disposed in the vicinity of weft reversal locations and being rotatable in closed travel paths, and means for guiding the weft to the warp threads, the holder members having a thread guide cooperating therewith for making the weft ready, the thread guide being displaceable in the closed travel path of one of the holder members.
- 1 provide means for feeding each weft over at least two holder members to the thread guide and from the thread guide in the form of a loop to a third holder member located opposite the thread guide. Consequently, only one motion of the thread guide is necessary for making ready a pair of wefts along the needle bar of the warp knitting machine.
- the respective holder members have a hookshaped structure and are connected to a drive mechanism so that the hook-shaped structure thereof always points in the same direction whereby entrainment and release of the weft loop thereby is facilitated.
- I provide two thread guides displaceable at a constant distance from one another in the closed travel path of one of the holders, one of the thread guides being adapted to entrain a new weft loop as the other of the thread guides releases to a holder member located opposite thereto a weft loop previously entrained by the other thread guide.
- the thread guide is mounted on a rotary drive mechanism capable of being fully counterbalanced.
- two thread guides are provided, they are respectively in weft-entraining or weft-releasing position alternatively when in the vicinity of the respective holder members so that the use of controlled gripping and releasing devices ,are superfluous.
- the wefts being fed to the thread guide can be delivered thereto respectively through separate thread feeders which are controllable in a conventional manner in accordance with a desired pattern.
- FIG. 1 is a diagrammatic view partly in section of a Raschel knitting machine constructed in accordance with my invention
- FIG. 2 is an enlarged side view of the device for filling a weft which includes two rotating thread guides and drive mechanism therefor as seen from the right-hand side of FIG. 1;
- FIG. 4 is a sectional view of FIG. 1 taken along the line IV-IV in the direction of the arrows;
- FIG. 12 is a top plan view of FIG. 11;
- FIG. 13 is a view corresponding to that of FIG. 8 showing a phase during the feeding of two wefts to the thread guide;
- FIG. 15 is a view of FIG. 14 as seen from the bottom thereof and rotated through an angle of 90;
- Parital warp beams 34 and 35 are rotatably mounted on the upper part of the side wall 1 and warp threads 36 and 37 lead therefrom, respectively, through spring seesaws or rocker arms 38 and 38' to eye needles 39 and 40 and therefrom to latch needles 31 of the knitting machine.
- the latch needles 31 are secured by a needle bar 21 to a carrier rod 23.
- the knitting machine has a main drive shaft 17 which carries a cam 18 by means of which a lever carrying follower rollers that are in engagement with the surface of the cam 18 is pivotable about a pivot shaft 19 fixed, for example, to the side wall 1.
- the lever 20 is pivotally connected to the carrier rod 23 supporting the needle bar 21 and raises and lowers the latter in accordance with the motion imparted thereto by the rotating cam 18.
- the carrier rod 23 is articulatingly connected at its lower end, as viewed in FIG. 1, to a pull lever 25 which is rotatably mounted on a pin 26 extending from the side wall 1.
- a cutting plate 27 is fixed to the side wall 1 and extends transversely therefrom.
- Fabric material 28 which has been knitted in the Raschel knitting machine of the invention is withdrawn from the needles 31 by rotatably mounted feed rollers 29 and 30, suitably driven, for example, through nonillustrated transmission mechanism, from the main drive shaft 17, and is wound on a beam 32.
- Bearings 310 and 310 are located respectively at the outer ends of the rod portions 308 and 308', the thread guides 312 and 312' being respectively rotatably mounted in the bearings 310 and 310.
- Transmission of rotary movements from the shaft 303 to the outer arms 308 and 308 as well as to the thread guides 312 and 312' is effected through a belt or chain drive mechanism 316, 317 and 317. Due to the fact that the drive of the thread guides 312 and 312' is effected through the drive mechanisms 317 and 317' respectively with a transmission ratio of 1:2, the hook-shaped thread guides always face in the same direction.
- FIG. 4 there is shown the Raschel knitting machine of my invention as viewed along the line IV-IV in the direction of the arrows shown in FIG. 1, several of the details of the machine having been omitted since they are not believed to be essential for understanding the invention, and in the interest of clarity.
- the finished knitted web 28 is clearly seen in FIG. 4 disposed adjacent a row of the stich-forming needles 31.
- the drive mechanism for'the needle bar 21 has been omitted in FIG. 4 to prevent obstruction of other features essential to the invention.
- Two wefts f and f are withdrawn from two bobbins 330 and 331 which are mounted on a supporting arm of the knitting machine and are fed to the thread guides 312 and 312' respectively which are attached to the rotary mechanism 300.
- the threads 7 and 1" are passed through the thread feeding devices 332 and 333 respectively to the holder members 334 to 337 shown in FIG. 4 at the left-hand side of the knitted web 28.
- the specific construction of the holder members 334 to 337 well as of the holder member 338 located at the right-hand side of the knitted web 28 in FIG. 4 will be described hereinafter in greater detail with respect to further figures in this application. It can be clearly seen, however, in FIG. 4, how the weft f is seized or entrained by the thread guide 312 from between the holder members 335 and 336.
- the shaft 303 of the weft-filling device of my invention is driven at a transmission ratio of 1:4 by a drive shaft 14, which received its driving power through suitable gear transmission from the main drive shaft 17 of the knitting machine.
- a drive shaft 14 which received its driving power through suitable gear transmission from the main drive shaft 17 of the knitting machine.
- FIG. 5 there is shown a view similar to that of FIG. 4 with several further details of the knitting machine omitted and moreover with the shaft 303 rotated through an angle of 90 with respect to the position thereof in FIG. 4 so that the thread guide 312 has entrained and drawn the Weft f, originally located between the holder members 335 and 336, in the form of a loop to a location substantially central of the width of the knitted web 28.
- the four holder members 334 to 337 have accordingly been rotated through an angle of 45.
- the thread guide 312' moves from the right-hand side to the left-hand side of FIG. and is actually located directly behind the thread guide 312 as viewed in FIG. 5.
- the holder members 334 to 337 fulfill three different functions, namely, they must fee'dthe weft so that it can be seized or entrained by the thread guides 312 or 312' on its travel path 318, they must make ready the weft at a location outside the needle zone of the knitting machine, and they must act as guide members for filling the readied wefts to the warp threads 36, 37.
- the knitted web 28 is shown in FIG. 6, in the interest of clarity, the second weft f has been omitted.
- the last weft of the knitted web 28 is applied to the warp 36 and 37 (FIG. 1) by means of the holder member 334 which serves as a guide member but, as shown in FIG. 6, has not yet been released from this holder member 334. It accordingly encircles the holder member 334 and extends, as in FIG. 4, to the thread guide 312' located opposite the holder member 334. From the thread guide 312', the weft then extends over the holder members 335 and 336 to the bobbin 330 (FIG. 4, for example) not shown in FIG. 6.
- the thread guide 312 In the course of travel of the thread guide 312 along the closed path 318 thereof in direction of the arrow 318a, the thread guide 312 assumes the solid-line position thereof shown in FIGS. 6 and 7. Accordingly, the hook-shaped thread guide 312 grips the thread 1 between the holder members 335 and 336 and, as the thread guide 312 moves outwardly i.e. toward the righthand side of FIG. 6, to the location thereof shown in phantom at 312a, it entrains a new thread loop S shown in double-dot-dash lines in FIG. 6. The dot-dash location of the thread loop S shown in FIG. 6 is not illustrated in FIG. 8, but rather only the path of the thread at the instant shown in FIG. 4 i.e.
- the thread 1 again extends to the holder member 335 located at the other side of the machine and therefrom, according to the loop illustrated in FIG. 5, over the thread 6 guide 312 to the holder member 336 as Well as to the nonillustrated bobbin 330.
- FIGS. 10 to 12 The transfer of the loop S by the thread guide 312' to the holder member 338 and the movements of the holder member are shown in FIGS. 10 to 12.
- the bearing 19 of FIG. 1 about which the double levers 321 and 322 are pivotable is shown in FIG. 10 in enlarged view.
- the roller followers located at a respective end of the double levers 321 and 322 abut against the cams 323 and 324 which are rotatable with the shaft 320 in direction of the arrow 320a.
- the lever 322 is provided at the free end thereof with a bearing 340 in which the holder member 338 is pivotally secured.
- FIG. 10 is a view from behind the plane of FIG. 1 so that the cutting plate 27 as shown in FIG. 10 is located to the right-hand side of the needles 31.
- the holder member 338 carries out a movement which corresponds substantially to that represented by the arrows of the triangle 338a, 338b, 338c. Naturally, this movement can be carried out over a path defining a different geometrical form. It is only essential that the thread transferred by the thread guide 312' to the holder member 338 is applied by the latter, acting as a guide member, to the warp threads and is freed, and that then the holder member 338 returns to its starting position when the next stitch is formed. Accordingly, the transfer of the thread loop S by the thread guide 312 to the holder member 338 has been clarified by the side and plan views of FIGS. 11 and 12.
- FIGS. 13 and 14 show how two wefts f and f can be fed to the warp.
- the view of FIG. 13 corresponds to that of FIG. 8, and the view of FIG. 14 corresponds substantially to that of FIG. 6.
- FIGS. 13 and 14 how the weft 1 which is to be filled is fed by the thread feeders 332 to the holder members 335 and 336 so that it can be gripped or entrained by the thread guide 312.
- FIG. 15 One way of controlling the thread feeders 332 and 333 is shown in FIG. 15. It can be seen already from FIGS. 4 and 5 that two cams 343 and 344 can be rotated by the main shaft 17 through a transmission 345 depending on the movement pulses that are applied by a conventional 7 control member 346 not shown in detail in FIG. 15 but, nevertheless, well known to the man of ordinary skill in the art, in order to obtain the desired pattern of the knitted web 28. Instead of the control member 346, other different cams 343 and 344 shaped according to the pattern can naturally also be employed.
- FIG. 15 there is shown also in FIG. 15 the condition wherein the thread 1 is fed by the thread feeder 332 to the holder members 335 and 336.
- the thread feeder 333 is raised to such a height that the thread 1" leading therefrom cannot be seized or entrained by the thread guide 312 as it travels along its path 318. If the thread I is to be filled into the knitted web as the weft instead of the thread f, the cams 343 and 344 are then rotated about a suitable angle in the direction of the arrow 347.
- the thread feeder 332 located adjacent the cam 343 is raised in the direction of the arrow 332a and the thread feeder 333 located adjacent the cam 334 is lowered in accordance with the arrow 333a to such a level that the threads f is fed over the thread guide members 335 and 336 instead of the thread 1 to the thread guide 12.
- FIGS. 16 and 17 there is shown how, for example, the hook-shaped holder members 334 to 337 can be mounted by means of a transmission so that the hooks always extend in the same direction.
- the rotary motion of the holder members as shown hereinbefore in FIGS. 8 and 9 is introduced by the main shaft 17 through the transmission 345 and the shaft 348 into the housing 354 secured to the frame of the knitting machine.
- an entrainer 349 is fastened which, in the form of a Maltese cross, cooperates with the disc 353.
- the transmission ratio is such that the shaft 355 which is rotated by the disc 353 is further actuated or indexed through one-eighth of a rotation for each rotation of the main shaft 17.
- the shaft 355 carries a disc 350 wherein the shafts 351a to 351d are secured which are rotatably mounted in the levers 352a to 352d, respectively.
- These levers 352a to 352d are rigidly secured to the holder members 334 to 337, respectively, which are in turn rotatably mounted in a cover member 357.
- the cover member 357 is also rotatably mounted by means of ball bearings 356 with respect to the housing 354.
- a different drive or transmission can obviously be used which ensures that the hooks of the holder members always face in the same direction during the circular movement thereof.
- Warp knitting machine having a zone wherein needles are disposed and means for supplying warp threads to the needles, comprising a device for inserting a weft, said device having holder members for making the weft ready outside the needle Zone, Weft reversal locations actuated in the vicinity of said holder members, and a thread guide cooperating with said holder members for feeding the weft to the warp threads, said thread guide being displaceable between said Weft reversal locations in a closed travel pathin which one ,of said holder members is disposed; and meansfor feeding a plurality of wefts selectively to said thread guide for entrainment thereby in the closed travel path thereof.
- Warp knitting machine wherein said means for feeding the wefts to said thread guide are located adjacent the holder members disposed in the. vicinity of the weft reversal locations.
- Warp knitting machine according to claim 2, wherein said holder members cooperate with said feeding means for feeding the wefts to said thread guide.
- Warp knitting machine wherein at least two holder members are located adjacent one another and a third holder member is located a distance therefrom, said feeding means being adapted to feed each weft over said two holder members to said thread guide and from said thread guide in the formof a loop to said third holder member.
- Warp knitting machine according to claim 1, wherein said thread guide has a hook-shaped structure.
- Warp knitting machine including separate thread feeders for feeding the wefts to said thread guide.
- Warp knitting machine including control means cooperating with said thread feeders for feeding the wefts to said thread guide so as to fill the weft in accordance with a given pattern.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
- Knitting Of Fabric (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681785269 DE1785269A1 (de) | 1968-09-04 | 1968-09-04 | Kettenwirkmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
US3609997A true US3609997A (en) | 1971-10-05 |
Family
ID=5706080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US854974A Expired - Lifetime US3609997A (en) | 1968-09-04 | 1969-09-03 | Warp knitting machine |
Country Status (10)
Country | Link |
---|---|
US (1) | US3609997A (it) |
JP (1) | JPS4933704B1 (it) |
BE (1) | BE738299A (it) |
CS (1) | CS149671B2 (it) |
DE (1) | DE1785269A1 (it) |
ES (1) | ES371006A2 (it) |
FR (1) | FR2030039A6 (it) |
GB (1) | GB1282151A (it) |
IT (1) | IT989561B (it) |
NL (1) | NL6913433A (it) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3834189A (en) * | 1972-03-17 | 1974-09-10 | Schlafhorst & Co W | Warp knitting machine |
US3906749A (en) * | 1972-12-27 | 1975-09-23 | Schlafhorst Co Maschf | Weft storage device for warp knitting machines |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017130492A1 (ja) | 2016-01-28 | 2017-08-03 | 住友金属鉱山株式会社 | ポリカーボネート樹脂組成物、熱線遮蔽成形体および熱線遮蔽積層体 |
DE102017114133A1 (de) * | 2017-06-26 | 2018-12-27 | Hochschule Niederrhein | Vorrichtung und Verfahren zum Vorlegen von Fäden, Textilmaschine |
-
1968
- 1968-09-04 DE DE19681785269 patent/DE1785269A1/de active Pending
-
1969
- 1969-08-22 FR FR6928859A patent/FR2030039A6/fr not_active Expired
- 1969-08-29 ES ES371006A patent/ES371006A2/es not_active Expired
- 1969-08-29 GB GB43073/69A patent/GB1282151A/en not_active Expired
- 1969-09-01 BE BE738299D patent/BE738299A/xx unknown
- 1969-09-02 CS CS695997A patent/CS149671B2/cs unknown
- 1969-09-03 NL NL6913433A patent/NL6913433A/xx unknown
- 1969-09-03 IT IT39808/69A patent/IT989561B/it active
- 1969-09-03 US US854974A patent/US3609997A/en not_active Expired - Lifetime
- 1969-09-04 JP JP44070274A patent/JPS4933704B1/ja active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3834189A (en) * | 1972-03-17 | 1974-09-10 | Schlafhorst & Co W | Warp knitting machine |
US3906749A (en) * | 1972-12-27 | 1975-09-23 | Schlafhorst Co Maschf | Weft storage device for warp knitting machines |
Also Published As
Publication number | Publication date |
---|---|
ES371006A2 (es) | 1971-08-01 |
JPS4933704B1 (it) | 1974-09-09 |
BE738299A (it) | 1970-02-16 |
NL6913433A (it) | 1970-03-06 |
CS149671B2 (en) | 1973-07-25 |
IT989561B (it) | 1975-06-10 |
GB1282151A (en) | 1972-07-19 |
DE1785269A1 (de) | 1972-03-30 |
FR2030039A6 (it) | 1970-10-30 |
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