CN1551936A - Device for selecting needles in circular knitting machines - Google Patents
Device for selecting needles in circular knitting machines Download PDFInfo
- Publication number
- CN1551936A CN1551936A CNA028172728A CN02817272A CN1551936A CN 1551936 A CN1551936 A CN 1551936A CN A028172728 A CNA028172728 A CN A028172728A CN 02817272 A CN02817272 A CN 02817272A CN 1551936 A CN1551936 A CN 1551936A
- Authority
- CN
- China
- Prior art keywords
- jack
- circular knitting
- knitting machine
- pole
- 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.)
- Pending
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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
- D04B15/66—Devices for determining or controlling patterns ; Program-control arrangements
- D04B15/68—Devices for determining or controlling patterns ; Program-control arrangements characterised by the knitting instruments used
- D04B15/78—Electrical devices
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
Abstract
A device for selecting needles in circular knitting machines has three basic magnetic pole systems, namely a preparatory magnetic retention system, an electromagnetic system for performing the selection and a retention system for the mechanical selection, the selection being based on a reaction force which arises between the magnetic attraction of the three magnetic pole systems acting on the surface of the needle jack and a spring associated with the needle jack.
Description
The present invention relates to a kind of device that is used for selecting knitting needle, compared with prior art, can obtain some new and favourable characteristics by adopting this device at circular knitting machine (circular knitting machine).
In the prior art, there is two types selective system basically: multilevel system and single level system.In multilevel system, actuator has a plurality of selective systems, and these selective systems act on hierarchical approaches and treat on more selecteed elements, thereby for the given actuating time of each selective system, by increasing the speed that progression can improve machine.In single level system, treat that more selecteed elements are directly activated.Obviously, compare with multilevel system, single level system has advantages of cheap price.Because it is much smaller that single level system takes up space, single level system also has the advantage of application facet.The major defect of single level system has more generally precision when being each element activated.Especially be difficult to make the position synchronous of actuated signal and actuator with respect to element to be selected.
The present invention is intended to disclose a kind of selecting arrangement, owing to utilize many field structures and by the sync bit of electromagnet being controlled automatically with respect to element to be selected, thereby to the cause that the magnetic force of selecting in the discriminate regions is optimized, this selecting arrangement has the advantage of operating aspect.
Therefore, the present invention relates to a kind of like this device, thereby this device is used to drive the so-called needle jack (jacks) of knitting needle by actuating will the data relevant with pattern to be knitted (or pattern) passes to the knitting needle of circular knitting machine.
This device comprises three basic magnetic pole systems, and promptly a preparation magnetic keeps system, to be used to carry out selecting electromagnetic system and to be used for the maintenance system that machinery is selected.
The selective power of this device is based on such reaction force, and this reaction force results from by three magnetic pole systemic effects between lip-deep polarity of needle jack and the spring relevant with needle jack.
In order more to be expressly understood the present invention, the mode with non-limiting example has provided some accompanying drawings relevant with device of the present invention below.
Fig. 1 schematically shows the arrangement architecture of the magnetic pole system that has inserted electromagnetic system;
Fig. 2 schematically shows the magnetic pole system that has inserted electromagnetic system but do not alignd with the maintenance system;
Fig. 3 schematically shows the position with respect to the end of a needle jack of magnetic pole system;
Fig. 4 and Fig. 5 schematically show a needle jack through selecting according to the formed path of different motion starting point;
Fig. 6 schematically shows the magnetic pole block structure with different magnet array structures with Fig. 7;
Fig. 8 schematically shows the characteristic curve of one two magnetic pole embodiment and magnetic pole embodiment more than two;
Fig. 9 represents a kind of arrangement architecture that is applicable to straight type knitting machine;
Figure 10 is the view perpendicular to magnetic pole strength of expression electromagnetic system;
Figure 11 is the side view of electromagnetic system separately;
Needle jack when Figure 12 represents to enter electromagnetic system.
Fig. 1 schematically shows three A of magnetic pole system with two kinds of different arrangement architectures with Fig. 2, B, C: in Fig. 1, inserted electromagnetic system and align with the maintenance system; In Fig. 2, inserted electromagnetic system but do not alignd with the maintenance system.
Fig. 3 represents an end of needle jack 1, and this needle jack 1 moves in the cocycle of described system with speed v (speed of machine) along the direction of arrow indication.Two opposite effect power: Fa are arranged is magnetic forces of magnetic pole A in effect on needle jack; Fm is the active force (elastic force) of spring.Also expressed two active force curves that act on needle jack in the figure, this active force is the function of its active position.Straight line 2 is values of acting force of the spring.Curve 3 takes the shape of the letter U, and this is owing to do not have magnetic pole strength in zone line 4, thereby makes field weakening.
Lower part among Fig. 3 shows the curve 5 that electromagnetic system B acts on the active force on the needle jack.Curve 3 and 5 active force and greater than active force across the spring of whole system, therefore under wherein a kind of state of electromagnetic system, needle jack keeps adhering on this electromagnetic system.
Its operating process is as follows:
Utilize mechanical device that needle jack is placed near the A of magnetic pole system, because Fa＞Fm, so this needle jack is attached on the A of magnetic pole system.When needle jack arrived area B, because Fs＞Fm, electromagnetic system made this needle jack keep adhering to.Needle jack then moves and continues to be attached on the C of system.Eliminate to a certain degree if electromagnetic system B will be worth Fs, Fm just opens needle jack and this components apart so, and needle jack is removed from the C of system.System B passes to each needle jack so in one way with mode data, so that on the C of system, can have some needle jacks that just adhering to and some separated needle jacks.From these two mechanical locations, a lever system can be carried these knitting needles along two different paths.
Its basic operation parameter is as follows:
Fig. 4 shows the formed path of this needle jack under the situation of a needle jack selected (system Fs is cancelled).The points 6 that straight line 2 and curve 3 intersects are such points, promptly put 6 places at this, and spring begins to work, so that needle jack is quickened, and path 7 is put 6 from this and begun.The C of maintenance system is from ordinate (or ordinate) 8, and on this ordinate 8, has along perpendicular to the direction of this magnetic pole mobile magnetic action power of braking to needle jack.Fig. 4 also shows formed another curve 9 of this needle jack when needle jack moves with bigger speed v.Speed is big more, and the interval H that is arrived on ordinate 8 is just more little.The path of curve 10 expressions one needle jack, this needle jack does not also reach enough spacing distance H and is just returned by this poles attract again.Act on the attraction of the magnetic pole on the needle jack and needle jack will be known as magnetic pole apart from the correlation between the distance of magnetic pole strength grade.The speed that the efficient of system and machine can reach depends on this parameter to a great extent.
Fig. 5 shows a similar operation process, and different is that the starting point that needle jack moves for the ordinate among the last figure has been delayed.If be used to cancel the signal of telecommunication delay in arrival of directed force F s, will have this delaying so.The effect that is produced on this path is equal to for given system speed and reduces described spacing distance H.Therefore, the signal of telecommunication precision that is passed to the C of system and sets up correlation between the physical location of needle jack and the C of system is the another one important parameter of system.
To be described magnetic pole system and electromagnetic system in more detail below.
The magnetic pole system:
The maintenance system is made of even number permanent magnets adjacent 11, and one of them magnetic pole strength of each permanent magnet 11 is facing to needle jack 1, and another magnetic pole strength is then facing to a public ferromagnetic substrate 12.Fig. 7 shows the arrangement architecture according to the magnetic pole of an embodiment, in this embodiment, has four blocks of magnet, and as can be seen, each magnet and the magnet that is adjacent are inverted mutually.Fig. 6 shows two and keeps A of system and C, and they have synthetic pole arrangement structure.Because for every block of magnet, in the bottom and upper magnet of himself system, nearest opposite magnetic pole face is facing to the surface of the adjacent magnets of the other system with identical polar, therefore, the magnetic field of magnet has preferential direction, thereby in the gap 4 between two magnetic pole systems, confining force is reduced greatly.
Fig. 8 shows the characteristic curve of " grade " parameter of one two magnetic pole embodiment 13 and magnetic pole embodiment 14 more than two and 15.For a specific height w, when needle jack was attached in the magnetic pole system, the attraction that acts on this needle jack all was identical in fact in all embodiments, and this is because the identical cause of magnetic regions.Yet, increase along with the spacing distance between needle jack and the magnet, reducing in arrangement architecture 15 of attraction than faster in arrangement architecture 13, shown in curve F-x among the figure, adopt such embodiment, in arrangement architecture 15 than in arrangement architecture 13, reaching higher selection speed.For the spacing distance H that path shown in Figure 3 reached, many magnetic poles systemic effect is more much smaller than the active force of two magnetic pole systemic effects on needle jack at the active force on the needle jack for needle jack.
The other advantage of being brought by this symmetry of system is that it is convenient to select needle jack on two moving directions, and is convenient to install several continuous systems.Fig. 9 shows the typical arrangement structure that is applicable to straight type knitting machine, wherein, has three A ' of magnetic pole system, A ", A ' " and two electromagnetic system C ', C ".The selection of needle jack 1 ' can be carried out in two different places, utilizes some levers knitting needle can be transported to two different operating positions from these two different places.
Electromagnetic system
Figure 10,11,12 shows electromagnetic system.
Figure 10 is a view perpendicular to magnetic pole strength, wherein, by orientation, makes electromagnetic system appear between A of maintenance system and the C.
Figure 11 is the side view of electromagnetic system separately, and wherein, the magnetic pole piece 16 of ferromagnetic material and 17 is separated by a permanent magnet 18.Limit the attraction surface of two magnetic pole strengths of described element 16,17 at its two ends 19 and 20 facing to needle jack.
On each magnetic pole piece, be wound with two windings or coil.Two coils 21 of the most close magnet 18 form the part of power supply circuits, and these power supply circuits can produce current cycle or circulation, and in order to resist the magnetic flux by the magnetic pole piece, described electric current is necessary.Two coils 22 form the part of circuit, and this circuit can detect the electric current that variation induced of the magnetic flux that produced by the magnetic pole piece.
Do not have in magnetic pole strength the place ahead under the situation of needle jack, each air section around the system will be magnetic circuit closed firmly.When having needle jack, the magnetic resistance of the flux path in magnetic pole strength will produce very big variation, and this is because the cause that needle jack is made by ferromagnetic material and the magnetic flux of circulation in coil 21 and 22 increases.One suitable circuit can detect the electric current that is induced in the coil 22, and can the position of these current values and needle jack is interrelated with respect to electromagnetic system.Figure 12 has expressed a needle jack, and this needle jack is in the moment of " entering " electromagnetic system, and wherein in this position, the circuit of coil 22 can detect this needle jack.From this signal, according to the difference of pattern, the circuit of coil 21 can the generation effect, so that select or do not select needle jack.Therefore, electromagnetic system itself determines the actuated position an of the best, so that can obtain maximum possible speed by kinematics effect as shown in Figure 5.
Claims (11)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200102008A ES2187369B1 (en) | 2001-09-05 | 2001-09-05 | DEVICE FOR THE SELECTION OF NEEDLES IN CIRCULAR MACHINES OF GENERO DE PUNTO. |
| ES200102008 | 2001-09-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1551936A true CN1551936A (en) | 2004-12-01 |
Family
ID=8498842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA028172728A Pending CN1551936A (en) | 2001-09-05 | 2002-09-05 | Device for selecting needles in circular knitting machines |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1433884A1 (en) |
| KR (1) | KR20040035755A (en) |
| CN (1) | CN1551936A (en) |
| ES (1) | ES2187369B1 (en) |
| WO (1) | WO2003021022A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652031B (en) * | 2013-11-21 | 2018-04-03 | 山德霓股份公司 | control device for knitting machine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113862888B (en) * | 2021-11-12 | 2023-03-21 | 杭州富阳富顺针织电脑有限公司 | Needle selector for knitting and using method |
| CN115262071B (en) * | 2022-07-21 | 2023-06-23 | 武汉纺织大学 | A high-speed magnetic levitation needle array control system and its control method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3614220C1 (en) * | 1986-04-26 | 1987-10-01 | Stoll & Co H | Control magnet arrangement for a pattern device on knitting machines for electrically controlled needle selection |
| IT1233128B (en) * | 1989-01-10 | 1992-03-14 | Furia Edoardo | NEEDLE SELECTION DEVICE FOR CIRCULAR KNITWEAR MACHINE, IN PARTICULAR FOR WOMEN'S SOCKS |
| DE4028132C2 (en) * | 1990-09-05 | 1994-06-30 | Harting Elektronik Gmbh | Selection magnet |
| DE4225655A1 (en) * | 1992-08-03 | 1994-02-10 | Schieber Universal Maschf | Textile machine |
-
2001
- 2001-09-05 ES ES200102008A patent/ES2187369B1/en not_active Expired - Fee Related
-
2002
- 2002-09-05 EP EP02772412A patent/EP1433884A1/en not_active Withdrawn
- 2002-09-05 CN CNA028172728A patent/CN1551936A/en active Pending
- 2002-09-05 WO PCT/ES2002/000418 patent/WO2003021022A1/en not_active Ceased
- 2002-09-05 KR KR10-2004-7003346A patent/KR20040035755A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652031B (en) * | 2013-11-21 | 2018-04-03 | 山德霓股份公司 | control device for knitting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003021022A1 (en) | 2003-03-13 |
| ES2187369A1 (en) | 2003-06-01 |
| KR20040035755A (en) | 2004-04-29 |
| ES2187369B1 (en) | 2004-09-16 |
| EP1433884A1 (en) | 2004-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |