EP2570532A1 - Sinker control apparatus for flat knitting machines - Google Patents
Sinker control apparatus for flat knitting machines Download PDFInfo
- Publication number
- EP2570532A1 EP2570532A1 EP11181580A EP11181580A EP2570532A1 EP 2570532 A1 EP2570532 A1 EP 2570532A1 EP 11181580 A EP11181580 A EP 11181580A EP 11181580 A EP11181580 A EP 11181580A EP 2570532 A1 EP2570532 A1 EP 2570532A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control apparatus
- sinker
- control cam
- movement portion
- linked movement
- 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.)
- Withdrawn
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Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/32—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
Definitions
- the base has at least one slot run through by the connection rod to couple with the linked movement portion and switching seat.
- the base has at least one restricting portion to restrict the driving movements of the linked movement portion.
- the sinker control apparatus of the invention provides a butting force through an elastic element to the switching seat in the direction of the transverse board to keep a desired contact relationship between the switching seat and transverse board, thereby can stabilize movement conditions of the sinker control apparatus relative to the transverse board, and effectively control the cams to switch between the sunk position and return position.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
Abstract
Description
- The present invention relates to a sinker control apparatus and particularly to a sinker control apparatus for flat knitting machines.
- In a conventional flat knitting machine a sinker between knitting needles is employed to control a yarn threaded through a knitting needle in loop releasing, loop coupling, loop escaping and loop forming processes. The sinker has a protrusive edge at one side corresponding to the knitting needle head. When the sinker is rotated the protrusive edge presses the yarn picked up by the knitting needle to form a loop, thereby to form a pattern on the surface of the knitting fabric.
- To control rotation of the sinker a control portion is provided at one side of the sinker in the flat knitting machine. For instance,
U.S. patent 5,475,990 discloses a sinker control actuator which includes a first cam and a second cam positioned next to each other. The first and second cams are braced respectively by a first parallel bar and second parallel bar on a mounting rod. The cams are linked via an auxiliary bar. The first parallel bar, second parallel bar and auxiliary bar are linked in movements to control motions of the first and second cams, thereby to push the sinker on the first and second cams to change the rotation angle to form different sizes of loops. Reference of other linked movement structures can also be found in R.O.C. patentTW 446016 201288244 and China patentCN1544739 . - The conventional first cam and second cam is swung by a switching member linked thereon. The switching member switches positions via a friction force or magnetic force with a needle bed, thereby drives the first and second cams swinging. The distance between the switching member and needle bed is constant. Hence flatness of the needle bed is important. Too great of the distance makes switching impossible, and too small of the distance increases the friction force between the switching member and needle bed that could latch the switching member on the needle bed.
- The primary object of the present invention is to overcome the problem of the conventional sinker control apparatus that could cause unsmooth switching during movements relative to the needle bed.
- To achieve the foregoing object the present invention provides a sinker control apparatus for flat knitting machines that is located on a transverse board over a plurality of knitting needles to drive parallel sinkers hinged between the knitting needles to rotate. The sinker control apparatus includes a base, a linked movement portion located on the base to perform driving movements, a first control cam and a second control cam hinged on the linked movement portion, and a switching portion coupled with the linked movement portion. The first control cam and second control cam include a sunk position to drive the sinkers to rotate and a return position to restore the sinkers when the linked movement portion performs the driving movements. The switching portion includes at least one connection rod connecting to the linked movement portion, a switching seat coupled on the connection rod, and an elastic element coupled around the connection rod to provide a butting force to push the switching seat towards the transverse board. The switching seat has a magnetic attracting portion at one side facing the transverse board to attract the transverse board magnetically.
- In one embodiment the base has at least one slot run through by the connection rod to couple with the linked movement portion and switching seat.
- In one embodiment the first control cam and second control cam have respectively a first driving rod and a second driving rod, and the linked movement portion has a first guide track and a second guide track run through respectively by the first driving rod and second driving rod to guide movements thereof to switch the first and second control cams between the sunk position and return position.
- In one embodiment the first guide track has a first pushing section to push the first driving rod to move the first control cam to the sunk position, and a first restoring section to draw the first driving rod to move the first control cam to the return position; the first pushing section and first restoring section are not located on the same plane.
- In one embodiment the second guide track has a second pushing section to push the second driving rod to move the second control cam to the sunk position, and a second restoring section to draw the second driving rod to move the second control cam to the return position; the second pushing section and second restoring section are not located on the same plane.
- In one embodiment the switching seat has a trough to hold the magnetic attracting portion.
- In one embodiment the elastic element includes a first end butting the switching seat and a second end butting the linked movement portion.
- In one embodiment the magnetic attracting portion is a magnet.
- In one embodiment the elastic element is a spring coupled around the connection rod.
- In one embodiment the base has at least one restricting portion to restrict the driving movements of the linked movement portion.
- The sinker control apparatus of the invention provides a butting force through an elastic element to the switching seat in the direction of the transverse board to keep a desired contact relationship between the switching seat and transverse board, thereby can stabilize movement conditions of the sinker control apparatus relative to the transverse board, and effectively control the cams to switch between the sunk position and return position.
- The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
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FIG. 1 is a fragmentary side view of an embodiment of the invention adopted for use on a flat knitting machine. -
FIG. 2 is a perspective view of an embodiment of the invention. -
FIG. 3 is another perspective view of an embodiment of the invention. -
FIG. 4 is an exploded view of an embodiment of the invention. -
FIG. 5 is a schematic view of the switching portion of an embodiment moved to the transverse board at different levels. -
FIGS. 6A and6B are schematic views of an embodiment of the invention in operating conditions. - Please refer to
FIG. 1 for an embodiment of the invention adopted for use on a flat knitting machine. Thesinker control apparatus 30 of the invention is located on a flat knitting machine. The flat knitting machine includes aneedle bed 11 and a carrier (not shown in the drawings) movable transversely and reciprocally relative to theneedle bed 11. Theneedle bed 11 holds a plurality of knittingneedles 21 parallel with each other and perpendicular to the moving direction of the carrier. Each knittingneedle 21 is paired with a sinker 22 hinged to receive a force to rotate. The sinker 22 has a downwardpressing boss 221 and acontrol boss 222. Atransverse board 12 is provided over the knittingneedles 21 to position the knittingneedles 21 on theneedle bed 11. - Please referring to
FIGS. 2 ,3 and4 , thesinker control apparatus 30 is located on thetransverse board 12 and coupled with the carrier (not shown in the drawings). Thesinker control apparatus 30 includes abase 31, a linkedmovement portion 32 coupled on thebase 31 to perform driving movements relative to thebase 31, afirst control cam 33 and asecond control cam 34 hinged on the linkedmovement portion 32, and aswitching portion 35 coupled on the linkedmovement portion 32. Thebase 31 has at least one restrictingportion movement portion 32. When the linkedmovement portion 32 performs the driving movements thefirst control cam 33 andsecond control cam 34 are driven to a sunk position and a return position. At the sunk position thefirst control cam 33 orsecond control cam 34 pushes thecontrol boss 222 of the sinker 22 so that the sinker 22 rotates and the downwardpressing boss 221 makes a yarn to form a loop. At the return position thefirst control cam 33 orsecond control cam 34 draws thecontrol boss 222 to rotate the sinker 22 backwards so that the downwardpressing boss 221 returns to its original position. Referring toFIGS. 1 and4 , theswitching portion 35 includes at least oneconnection rod 351 connected to the linkedmovement portion 32 and aswitching seat 352 coupled on theconnection rod 351. In this embodiment theconnection rod 351 runs through the linkedmovement portion 32 in a movable manner so that theswitching portion 35 is movable against the linkedmovement portion 32. Or theswitching seat 352 may also be movably coupled on theconnection rod 351 so that theswitching seat 352 is movable on the connectingrod 351. Thebase 31 includes at least oneslot 312 run through by theconnection rod 351 to couple with the linkedmovement portion 32 and switchingseat 352. Theswitching seat 352 has a magnetic attractingportion 50 at one side facing thetransverse board 12 to form magnetic attraction therewith. The magnetic attractingportion 50 can be a magnet. Theswitching seat 352 has atrough 353 to hold the magnetic attractingportion 50. - The first and
second control cams first driving rod 331 and asecond driving rod 341. The linkedmovement portion 32 has afirst guide track 321 and asecond guide track 322 run through respectively by thefirst driving rod 331 andsecond driving rod 341 to guide movements thereof to switch thefirst control cam 33 andsecond control cam 34 between the sunk position and return position. Thefirst guide track 321 has a first pushingsection 323 to push thefirst driving rod 331 to drive thefirst control cam 33 to the sunk position and a first restoringsection 324 to draw thefirst driving rod 331 to drive thefirst control cam 33 back to the return position. The first pushingsection 323 and first restoringsection 324 are at different planes. Similarly, thesecond guide track 322 also has a second pushingsection 323a to push thesecond driving rod 341 to drive thesecond control cam 34 to the sunk position and a second restoringsection 324a to draw thesecond driving rod 341 to drive thesecond control cam 34 back to the second return position. The second pushingsection 323a and second restoringsection 324a are at different planes. - In this invention, the switching
portion 35 further includes anelastic element 40 coupled around theconnection rod 351. Theelastic element 40 has afirst end 41 butting the switchingseat 352 and asecond end 42 butting the linkedmovement portion 32. In this embodiment the elastic element is a spring. When the switchingportion 35 is moved at a position at a section difference relative to thetransverse board 12, as shown inFIG. 5 , thefirst end 41 andsecond end 42 of theelastic element 40 press respectively the switchingseat 352 and linkedmovement portion 32 to give the switching seat 352 a butting force towards thetransverse board 12 so that the switchingseat 352 and thetransverse board 12 are maintained in a desired contact relationship without forming too much distance to make driving the switchingseat 352 not possible, or squeezing between the switchingseat 352 andtransverse board 12 to make transverse movement of the switchingseat 352 not possible. - Please refer to
FIGS. 6A and6B for an embodiment of the invention in operating conditions. At the initial state, as shown inFIG. 6A , the magnetic attractingportion 50 of the switchingseat 352 and thetransverse board 12 attract each other magnetically to position thesinker control apparatus 30 on thetransverse board 12, thefirst driving rod 331 of thefirst control cam 33 is at the first restoringsection 324 of thefirst guide track 321 so that thefirst control cam 33 is at the return position, while thesecond driving rod 341 of thesecond control cam 34 is at the second pushing section 313a of thesecond guide track 322 to make thesecond control cam 34 at the sunk position. - When the
sinker control apparatus 30 is moved in the direction R relative to thetransverse board 12, at the initial moving period because of mutual magnetic attraction between the magnetic attractingportion 50 of the switchingseat 352 andtransverse board 12 only thebase 31 and the first andsecond control cams first driving rod 331 of thefirst control cam 33 moves from the first restoringsection 324 of thefirst guide track 321 to the first pushingsection 323 so thatfirst control cam 33 also is switched from the return position to the sunk position, meanwhile, thesecond driving rod 341 of thesecond control cam 34 moves from the second pushingsection 323a of thesecond guide track 322 to the second restoringsection 324a so that thesecond control cam 34 is switched from the sunk position to the return position as shown inFIG. 6B . With the movements continued, thefirst driving rod 331 andsecond driving rod 341 drive the linkedmovement portion 32 and switchingportion 35 located thereon to proceed a driving movement relative to the base 31 until the linkedmovement portion 32 hitting the restrictingportion 311. - Thereafter, if moving the
sinker control apparatus 30 in the direction L relative to thetransverse board 12 is intended, in the initial moving period, because of mutual magnetic attraction between the magnetic attractingportion 50 of the switchingseat 352 andtransverse board 12 only thebase 31 and the first andsecond control cams first driving rod 331 of thefirst control cam 33 moves from the first pushingsection 323 of thefirst guide track 321 to the first restoringsection 324 so thatfirst control cam 33 is switched from the sunk position to the return position, meanwhile, thesecond driving rod 341 of thesecond control cam 34 moves from the second restoringsection 324a of thesecond guide track 322 to the second pushingsection 323a so that thesecond control cam 34 is switched from the return position to the sunk position as shown inFIG. 6A . With the movements continued, thefirst driving rod 331 andsecond driving rod 341 drive the linkedmovement portion 32 and switchingportion 35 located thereon to proceed a driving movement relative to the base 31 until the linkedmovement portion 32 hitting another restrictingportion 311 a. - As a conclusion, the sinker control apparatus of the invention can maintain the switching seat and the transverse board in a desired contact relationship to stabilize the movement condition of the sinker control apparatus relative to the transverse board, thereby can switch the control cams between the sunk position and return position as desired. Moreover, the linked movement portion is constructed simpler than the conventional cam-driving one, thus can be fabricated and assembled easier to reduce production cost. It provides a significant improvement over the conventional techniques.
- While the preferred embodiments of the invention have been set forth for the purpose of disclosure, modifications of the disclosed embodiments of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.
Claims (11)
- A sinker control apparatus for flat knitting machines located on a transverse board (12) over a plurality of knitting needles (21) to drive parallel hinged sinkers (22) between the knitting needles (21) to rotate, comprising:a base (31);a linked movement portion (32) located on the base (31) to perform driving movements relative to the base (31);a first control cam (33) and a second control cam (34) that are hinged on the linked movement portion (32) and include respectively a sunk position to drive the sinkers (22) to rotate and a return position to restore the sinkers (22) when the linked movement portion (32) performs the driving movements; anda switching portion (35) which includes at least one connection rod (351) connected to the linked movement portion (32), a switching seat (352) coupled on the connection rod (351) and an elastic element (40) coupled around the connection rod (351) to provide a butting force to the switching seat (352) towards the transverse board (12), the switching seat (35) including a magnetic attracting portion (50) at one side facing the transverse board (12) to form magnetic attraction therewith.
- The sinker control apparatus of claim 1, wherein the base (31) includes at least one slot (312) run through by the connection rod (351) coupling with the linked movement portion (32) and the switching seat (352).
- The sinker control apparatus of claim 1 or 2, wherein the first control cam (33) and the second control cam (34) include respectively a first driving rod (331) and a second driving rod (341), the linked movement portion (32) including a first guide track (321) and a second guide track (322) run through respectively by the first driving rod (331) and the second driving rod (341) to guide movements thereof to switch the first control cam (33) and the second control cam (34) between the sunk position and the return position.
- The sinker control apparatus of claim 3, wherein the first guide track (321) includes a first pushing section (323) to push the first driving rod (331) to drive the first control cam (33) to the sunk position and a first restoring section (324) to draw the first driving rod (331) to drive the first control cam (33) back to the return position, the first pushing section (323) and the first restoring section (324) being located not on a same plane.
- The sinker control apparatus of claim 3 or 4, wherein the second guide track (322) includes a second pushing section (323a) to push the second driving rod (341) to drive the second control cam (34) to the sunk position and a second restoring section (324a) to draw the second driving rod (341) to drive the second control cam (34) back to the return position, the second pushing section (323a) and the second restoring section (324a) being located not on a same plane.
- The sinker control apparatus of any of the preceding claims, wherein the switching seat (352) includes a trough (353) to hold the magnetic attracting portion (50).
- The sinker control apparatus of any of the preceding claims, wherein the elastic element (40) includes a first end (41) butting the switching seat (352) and a second end (42) butting the linked movement portion (32).
- The sinker control apparatus of any of the preceding claims, wherein the magnetic attracting portion (50) is a magnet.
- The sinker control apparatus of any of the preceding claims, wherein the elastic element (40) is a spring coupled around the connection rod (351).
- The sinker control apparatus of any of the preceding claims, wherein the base (31) includes at least one restricting portion (311, 311 a) to restrict the driving movements of the linked movement portion (32).
- A flat knitting machine, comprising a sinker control apparatus according to any of the preceding claims, said sinker control apparatus being located on a transverse board (12) over a plurality of knitting needles (21) of said flat knitting machine to drive parallel hinged sinkers (22) between the knitting needles (21) to rotate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11181580A EP2570532A1 (en) | 2011-09-16 | 2011-09-16 | Sinker control apparatus for flat knitting machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11181580A EP2570532A1 (en) | 2011-09-16 | 2011-09-16 | Sinker control apparatus for flat knitting machines |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2570532A1 true EP2570532A1 (en) | 2013-03-20 |
Family
ID=44785402
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11181580A Withdrawn EP2570532A1 (en) | 2011-09-16 | 2011-09-16 | Sinker control apparatus for flat knitting machines |
Country Status (1)
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EP (1) | EP2570532A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104111622A (en) * | 2014-06-16 | 2014-10-22 | 福建睿能科技股份有限公司 | Mechanical equipment and operation box thereof |
CN108360132A (en) * | 2018-04-25 | 2018-08-03 | 汕头市连兴实业有限公司 | A kind of pressure dotted line mechanism |
CN108589000A (en) * | 2018-03-21 | 2018-09-28 | 浙江丰帆数控机械有限公司 | A kind of flat machine |
CN109537154A (en) * | 2019-01-16 | 2019-03-29 | 宁波博日机械有限公司 | A kind of Kanehara device of Computerized flat knitting machine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0672769A1 (en) * | 1994-03-18 | 1995-09-20 | Shima Seiki Mfg., Ltd. | Flat bed knitting machine with movable yarn guide members |
US5475990A (en) | 1993-11-05 | 1995-12-19 | S. Stoll Gmbh & Co. | Sinker control actuator for flat knitting machine |
CN1544739A (en) | 2003-11-14 | 2004-11-10 | 冯加林 | Sinker control device for straight-bar machines |
CN201288244Y (en) | 2008-10-10 | 2009-08-12 | 茅木泉 | Flexible mechanical control device for computer braiding flat-bed machine sinker |
-
2011
- 2011-09-16 EP EP11181580A patent/EP2570532A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5475990A (en) | 1993-11-05 | 1995-12-19 | S. Stoll Gmbh & Co. | Sinker control actuator for flat knitting machine |
EP0672769A1 (en) * | 1994-03-18 | 1995-09-20 | Shima Seiki Mfg., Ltd. | Flat bed knitting machine with movable yarn guide members |
CN1544739A (en) | 2003-11-14 | 2004-11-10 | 冯加林 | Sinker control device for straight-bar machines |
CN201288244Y (en) | 2008-10-10 | 2009-08-12 | 茅木泉 | Flexible mechanical control device for computer braiding flat-bed machine sinker |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104111622A (en) * | 2014-06-16 | 2014-10-22 | 福建睿能科技股份有限公司 | Mechanical equipment and operation box thereof |
CN104111622B (en) * | 2014-06-16 | 2017-06-20 | 福建睿能科技股份有限公司 | Weaving device and its operating case |
CN108589000A (en) * | 2018-03-21 | 2018-09-28 | 浙江丰帆数控机械有限公司 | A kind of flat machine |
CN108589000B (en) * | 2018-03-21 | 2023-09-26 | 浙江丰帆数控机械有限公司 | Flat knitting machine |
CN108360132A (en) * | 2018-04-25 | 2018-08-03 | 汕头市连兴实业有限公司 | A kind of pressure dotted line mechanism |
CN108360132B (en) * | 2018-04-25 | 2023-12-22 | 汕头市连兴实业有限公司 | Broken line pressing mechanism |
CN109537154A (en) * | 2019-01-16 | 2019-03-29 | 宁波博日机械有限公司 | A kind of Kanehara device of Computerized flat knitting machine |
CN109537154B (en) * | 2019-01-16 | 2023-09-12 | 宁波博日机械有限公司 | Letter gram device of computerized flat knitting machine |
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