EP0474195A2 - Aimant de sélection - Google Patents

Aimant de sélection Download PDF

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Publication number
EP0474195A2
EP0474195A2 EP91114852A EP91114852A EP0474195A2 EP 0474195 A2 EP0474195 A2 EP 0474195A2 EP 91114852 A EP91114852 A EP 91114852A EP 91114852 A EP91114852 A EP 91114852A EP 0474195 A2 EP0474195 A2 EP 0474195A2
Authority
EP
European Patent Office
Prior art keywords
pole
selection
selection magnet
magnet according
holding
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.)
Granted
Application number
EP91114852A
Other languages
German (de)
English (en)
Other versions
EP0474195B1 (fr
EP0474195A3 (en
Inventor
Dietmar Dipl.-Kaufm. Harting
Ernst-Heinrich Dipl.-Ing. Harting
Reiner Dipl.-Phys. Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harting Electronics GmbH and Co KG
Original Assignee
Harting Electronics GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Harting Electronics GmbH and Co KG filed Critical Harting Electronics GmbH and Co KG
Publication of EP0474195A2 publication Critical patent/EP0474195A2/fr
Publication of EP0474195A3 publication Critical patent/EP0474195A3/de
Application granted granted Critical
Publication of EP0474195B1 publication Critical patent/EP0474195B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 ; Programme-control arrangements
    • D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
    • D04B15/78—Electrical devices

Definitions

  • the invention relates to a selection magnet for needle selection in textile machines with a permanent magnetic holding pole area and an electromagnetically controllable control pole area.
  • Such selection magnets are used in textile machines for needle selection.
  • the needles or the boards connected to them are mechanically guided over the holding and control areas during a work cycle, the boards being held by the holding pole areas depending on their magnetic state or being released for removal (ejection) from them.
  • Such selection magnets are known for example from DE-PS 36 14 220.
  • a continuous permanent magnet block is delimited on both sides at its poles by pole plates, so that a long permanent magnet holding magnet system is formed.
  • the pole plates have two or more cutouts as seen over their longitudinal extent in which the cores are inserted and carry the coils and form the control pole areas, that is to say erasable pole areas.
  • the control pole areas In the state without external electrical energy, the control pole areas also represent holding magnets, which draw their permanent magnetic field from the permanent magnet block via the pole plates.
  • these selection boards form a changing shunt, which thus also influences the field and the holding force of the control pole area.
  • the extinguishing current required for this extinguishing system must also be adapted, depending on the influence of the holding area by the different number of selection boards lying on it, in order to achieve a clean extinguishing of the control pole area.
  • the disadvantage here is that the control pole area is dependent on the field of the holding pole area, and only by electronically adjusting the extinguishing current can this system be erased so cleanly that it functions satisfactorily.
  • the Hall generator integrated in the magnet for this purpose and the electronic control circuit are complex and costly.
  • the invention is based on the object of designing a selection magnet of the type mentioned at the outset such that the control pole region is influenced by the fields influenced by needles or circuit boards the holding pole areas is avoided and thus additional electronic control means can be saved.
  • the selection magnet should be as small-volume as possible and still have sufficient holding forces for the needles or sinkers, a large number of selection magnets being able to be arranged next to one another in a confined space, and mutual influencing of the various selection magnets should also be excluded.
  • the selection magnets should be able to be operated at high clock frequencies.
  • the holding pole region has two spaced sub-regions, each consisting of holding magnet systems, each having two pole shoes with a permanent magnet arranged between them, that the control pole region is arranged between the pole shoe pairs of the holding magnets, an essentially U or Y-shaped magnetic core is provided, the upper leg ends of which protrude into a gap between the pole shoes of the holding magnets, that at least one excitation coil is provided on each of the two legs of the magnetic core, and that holding means are provided for mechanical cohesion of the individual parts of the selection magnet.
  • the advantages achieved with the invention consist in particular in that a magnetic influencing of the control pole area by the holding pole areas is avoided when different and a changing number of selection boards move over the holding pole areas.
  • Another object of the invention was to design a selection magnet of the type mentioned at the outset in such a way that the maximum possible working frequency of the textile machine (interaction of magnet systems and circuit boards) is increased.
  • auxiliary pole areas are arranged which can be electromagnetically controlled by energizing their control coils.
  • the selection magnet 1 shown in FIG. 1 is block-shaped and has 2 holding pole regions 3, 3 'on its upper side and a control pole region 4 arranged between these regions. Above the top of the selection magnet there are shown boards a - d which are connected to the needles of a knitting machine or act on them in such a way that the needles are either activated (knitting) or not activated (not knitting). During operation of the knitting machine, the boards are guided in direction V over the top 2 of the selection magnet 1, wherein they are first attracted by the holding pole area 3 and held on the top of the selection magnet (board a). In a further continuation of the board movement, this then arrives in the control pole area 4 (board b). Here it is decided whether the corresponding needle should knit or not.
  • control pole area is magnetically active, the board is on the top of the selection magnet held and finally reaches the left holding pole area 3 ', where it is still held on its surface (circuit board c). If the control pole area is magnetically neutral (inactive), the board is removed by an external force from the upper side of the selection magnet by an amount S, and if it continues to move over the selection magnet, it remains at this distance because it is away from the holding magnet area 3 '. is no longer tightened (circuit board d).
  • the selection magnet consists essentially of a housing 5 made of non-magnetic, highly thermally conductive material, into which the individual parts of the magnet system are inserted.
  • a Y-shaped magnetic core 6 is provided, which is provided with two excitation coils 7 on its legs 8. If necessary. the magnetic core can also be U-shaped. In order to reduce the volume of the arrangement, the excitation coils are offset, arranged nested on the legs of the core.
  • the magnetic core is preferably made from laminated metal sheets.
  • a printed circuit board 9 carries the electrical connections of the excitation coils and is fastened in the lower region of the core.
  • the lower end 10 of the magnetic core is inserted into the housing in such a way that there is a good heat-conducting transition.
  • the upper leg ends 11 terminate with the upper side 2 of the selection magnet and form here the control pole area 4.
  • recesses are provided in the housing, into which permanent magnets 12 and pole shoes 14 provided with side lugs 13 are inserted.
  • the permanent magnets are designed as flat, rectangular magnets and magnetized in the direction of their thickness.
  • the magnetization direction of the permanent magnets is indicated in FIG. 2C by the designations NS.
  • the pole pieces are also flat and attached to the flat sides of the permanent magnets.
  • the upper ends of the pole shoes end with the top 2 of the selection magnet.
  • a narrow gap 15 is provided between the leg ends 11 of the magnetic core and the pole shoes 14, into which a non-magnetic material with a small thickness L is inserted in order to ensure a defined distance between the leg ends and the pole shoes.
  • the entire system is potted with a potting compound, and the surface 2 of the selection magnet is ground flat.
  • the surface is provided with a surface coating (coating with titanium oxide, tungsten carbide or similar wear-resistant material) in order to avoid possible abrasion during operation (sliding the boards over the surface).
  • a ceramic or hard metal rail can also be used for this purpose be used along the longitudinal axis of the selection magnet, which ends with the surface 2 or protrudes slightly above it.
  • the direction of magnetization of the permanent magnets used see FIG.
  • control pole area 4 ensures that the control pole area 4 is present as a magnetic zone when the excitation coils are not energized, that is to say the boards are also in the control pole area the selection magnet is first attracted, and when the excitation coils are energized, the control pole area becomes magnetically neutral, and the circuit board now located in this area is discarded.
  • 3 shows a selection magnet of basically the same design, only the permanent magnets with oppositely directed magnetization directions are inserted into the system (see polarization information N - S).
  • the control pole region is formed as a magnetically neutral zone, and the circuit board located in this region is thrown off if the control pole region is not magnetized by energization of the excitation coils and the circuit board holds its position on the surface of the selection magnet.
  • the electromagnetic system of the selection magnet is shown in different views.
  • the system consists essentially of the Y-shaped Magnetic core 6, which is preferably assembled from laminated metal sheets and the two excitation coils 7.
  • the excitation coils are offset in height and nested on the legs 8 of the core.
  • a printed circuit board is pushed onto the end 10 of the magnetic core below the coils.
  • the connections of the excitation coils are routed to the printed circuit board, where the connecting lines of the selection magnet are then soldered. Depending on requirements, the two coils can be connected in parallel or in series, or, if necessary, can also be connected separately to individual connecting lines.
  • an electromagnetic system is also shown in FIGS. 5A to 5C, with several excitation coils 7 being provided on each leg 8 of the magnetic core. Here, too, the coils are offset from one another and pushed onto the legs 8 in a nested manner.
  • the coil connections are guided on a printed circuit board 9, on which electronic components (power amplifiers 16) are connected to the coil connections. By controlling the power amplifiers accordingly, the coils can be controlled separately or together as required.
  • a modified selection magnet is shown, the individual parts of which are embedded in an envelope 17, which can be made of plastic material, for example.
  • a metal plate 19 with fastening bores 18 is inserted in the lower part of the casing, into which the lower end 10 of the magnetic core is inserted.
  • a groove 20 is incorporated in the lower bottom region, which extends into the lower end 10 of the magnetic core.
  • a disk-shaped permanent magnet 21 is inserted into this groove.
  • FIG. 8 shows a slot 22 is incorporated in the lower core end 10, into which a permanent magnet 23 is inserted.
  • a selection magnet is shown in FIGS. 9A and 9B, in which two electromagnetic systems are provided adjacent, the middle holding pole region being effective for the right and left systems. Otherwise, the mode of operation and the structure correspond to the selection magnet described further above in FIGS. 2A to 2C.
  • FIG. 10 shows a similar selection magnet with two electromagnetic systems, whose mode of operation and the use of the permanent magnets correspond to the selection magnet described earlier in FIG. 3.
  • FIGS. 11A-11C a further modified selection magnet is shown in FIGS. 11A-11C, the outer shape of which is trapezoidal.
  • the components of the system are cast or overmolded with one another in a corresponding form.
  • the surface 2 of the selection magnet is arranged obliquely to the base.
  • Fig. 12 shows the execution of the corresponding electromagnetic system with beveled leg ends of the magnetic core.
  • FIG. 13 shows a selection magnet 1 ′ which essentially corresponds to the selection magnet already shown in FIG. 1 and described in more detail above.
  • an additional auxiliary pole area 24 is provided, which is located next to the control pole area 4 and thus between this control pole area and the holding pole area 3.
  • a selection magnet 1 ' is shown.
  • the selection magnet is essentially designed like the selection magnet shown in FIGS. 2A to 2C, and the same reference numbers are also entered for corresponding parts.
  • an auxiliary pole area 24 is provided in addition to the control pole area 4.
  • the auxiliary pole 25 essentially consists of two pole pieces 26 and two control coils 27 arranged thereon.
  • a permanent magnet 28 is arranged in the lower region between the pole pieces and is magnetized in the direction of its thickness. The upper ends of the auxiliary pole or the pole pieces terminate with the top 2 of the selection magnet.
  • the auxiliary pole area thus only adjoins the control pole area directly through a small, non-magnetic gap which serves for magnetic decoupling.
  • the auxiliary pole consists of at least one pole piece and one coil, but is preferably formed from two pole pieces, which each carry a control coil and are connected to each other below the control coils via a permanent magnet.
  • the auxiliary pole area 24 When the selection magnet is in operation, the auxiliary pole area 24 initially represents a permanent magnetic holding pole, similar to the adjacent holding pole area 3, but the magnetic force of the auxiliary pole area can be influenced via the control coils 27. If necessary. If the auxiliary pole area has an inverted effect, it can also be provided that the auxiliary pole consists only of a soft magnetic iron circuit and one or more control coils, no permanent magnet being used. In this case, the magnetic force of the auxiliary pole area is then regulated only by a corresponding energization of the control coils. The auxiliary pole area is controlled during operation of the textile machine depending on its working frequency. At low operating frequencies, the auxiliary pole area is controlled so that it always has its full permanent magnetic or possibly electromagnetic holding force. It then acts like the following holding pole area.
  • the auxiliary pole area is influenced by appropriate control of the control coils in such a way that in a certain time period the permanent or, if applicable, electromagnetic holding force of the auxiliary pole area is weakened, so that control boards which, due to the high operating frequency (speed of movement of the boards) during the deletion process in the control pole area, have not yet fallen far enough from the pole face of the selection magnet, continue above the auxiliary pole area can drop and thus there is no risk that they will be attracted again by the holding pole area, as would be the case with an arrangement without auxiliary pole area.
  • auxiliary pole region can, if necessary, be provided for all of the selection magnets shown in FIGS. 1 to 12. If necessary. can also be provided that two or more auxiliary pole areas are arranged one behind the other. The auxiliary pole areas are preferably formed in the same or approximately the same width as the control pole area. If necessary. can also be provided that the auxiliary pole is designed as a one-sided pole, in which case only a single pole piece and a control coil arranged thereon are to be provided. 15 A to 15 C, a selection magnet 1 'is shown with a modified auxiliary pole area 24'.
  • the auxiliary pole 25 is formed on the one hand only as a one-sided pole, and on the other hand is the pole piece 26 'inserted into the pole piece 14 of the holding pole area 3.
  • the control coil 27 is provided on the pole piece.
  • the auxiliary pole initially acts as a permanent magnetic holding pole, the permanent holding force being brought about by the permanent magnet 12.
  • the holding force of the auxiliary pole / auxiliary pole area can then be controlled and influenced.
  • Modifications of this system can consist in that - as in the arrangements described above - two auxiliary poles are provided for the auxiliary pole area, in which case a pole piece 26 'is inserted into the adjacent pole pieces 14, or that the pole piece 14 and the respective pole piece 26' be formed as a one-piece part.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP91114852A 1990-09-05 1991-09-03 Aimant de sélection Expired - Lifetime EP0474195B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4028132A DE4028132C2 (de) 1990-09-05 1990-09-05 Auswahlmagnet
DE4028132 1990-09-05

Publications (3)

Publication Number Publication Date
EP0474195A2 true EP0474195A2 (fr) 1992-03-11
EP0474195A3 EP0474195A3 (en) 1992-08-12
EP0474195B1 EP0474195B1 (fr) 1995-06-21

Family

ID=6413638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91114852A Expired - Lifetime EP0474195B1 (fr) 1990-09-05 1991-09-03 Aimant de sélection

Country Status (2)

Country Link
EP (1) EP0474195B1 (fr)
DE (2) DE4028132C2 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442405C1 (de) * 1994-11-30 1996-01-11 Harting Elektronik Gmbh Auswahlmagnet
EP0712952A1 (fr) * 1994-11-17 1996-05-22 HARTING ELEKTRONIK GmbH Système de sélection d'aiguilles électromagnétique dans des machines à tricoter
US5520024A (en) * 1994-04-15 1996-05-28 Matec S.R.L. Selection device for an elastic selector for needles in a circular knitting machine
EP0748887A1 (fr) * 1995-06-15 1996-12-18 Shima Seiki Manufacturing, Ltd. Dispositif de sélection d'aiguilles pour un métier à tricoter rectiligne
US5669249A (en) * 1995-03-03 1997-09-23 Matec S.R.L. Magnetic selection ring for an elastic selector for needles in a circular knitting machine
WO2003021022A1 (fr) * 2001-09-05 2003-03-13 Quantum Knitting Technologies S.A. Dispositif de selection d'aiguilles dans des machines a tricoter circulaires
WO2005098116A1 (fr) * 2004-03-30 2005-10-20 Shima Seiki Manufacturing, Ltd. Actionneur de sélection pour organe de tricotage
EP1643026A1 (fr) * 2004-10-02 2006-04-05 H. Stoll GmbH & Co. KG Système magnétique de sélection d'aiguilles pour produire des tissus tricotés à motifs
EP1948858B1 (fr) * 2005-11-18 2016-09-07 SANTONI S.p.A. Actionneur magnetique, particulierement destine aux dispositifs de selection des machines de tricotage-chaussant ou autres

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2179414A5 (fr) * 1972-04-04 1973-11-16 Bonneterie Sa Et
DE2356536A1 (de) * 1973-11-13 1975-05-15 Stoll & Co H Abwurfstelle an steuermagnet
FR2428096A1 (fr) * 1978-06-05 1980-01-04 Dubied & Cie Sa E Dispositif de selection electromagnetique des aiguilles d'une machine a tricoter
FR2568596A1 (fr) * 1984-08-06 1986-02-07 Colosio Cesare Srl Machine de bonneterie circulaire a selection electromagnetique des aiguilles.
DE3614220C1 (de) * 1986-04-26 1987-10-01 Stoll & Co H Steuermagnetanordnung fuer eine Mustervorrichtung an Strickmaschinen zur elektrisch gesteuerten Nadelauswahl
EP0249203A1 (fr) * 1986-06-11 1987-12-16 Heiko Seisakusho, Ltd. Dispositif de sélection électromagnétique d'une machine à tricoter
DE3928505A1 (de) * 1988-09-01 1990-03-15 Elitex Zavody Textilniho Verfahren zur auswahl von arbeitselementen einer strickmaschine und elektromagnetischer umsetzer zur durchfuehrung dieses verfahrens

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2179414A5 (fr) * 1972-04-04 1973-11-16 Bonneterie Sa Et
DE2356536A1 (de) * 1973-11-13 1975-05-15 Stoll & Co H Abwurfstelle an steuermagnet
FR2428096A1 (fr) * 1978-06-05 1980-01-04 Dubied & Cie Sa E Dispositif de selection electromagnetique des aiguilles d'une machine a tricoter
FR2568596A1 (fr) * 1984-08-06 1986-02-07 Colosio Cesare Srl Machine de bonneterie circulaire a selection electromagnetique des aiguilles.
DE3614220C1 (de) * 1986-04-26 1987-10-01 Stoll & Co H Steuermagnetanordnung fuer eine Mustervorrichtung an Strickmaschinen zur elektrisch gesteuerten Nadelauswahl
EP0249203A1 (fr) * 1986-06-11 1987-12-16 Heiko Seisakusho, Ltd. Dispositif de sélection électromagnétique d'une machine à tricoter
DE3928505A1 (de) * 1988-09-01 1990-03-15 Elitex Zavody Textilniho Verfahren zur auswahl von arbeitselementen einer strickmaschine und elektromagnetischer umsetzer zur durchfuehrung dieses verfahrens

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5520024A (en) * 1994-04-15 1996-05-28 Matec S.R.L. Selection device for an elastic selector for needles in a circular knitting machine
EP0712952A1 (fr) * 1994-11-17 1996-05-22 HARTING ELEKTRONIK GmbH Système de sélection d'aiguilles électromagnétique dans des machines à tricoter
DE4442405C1 (de) * 1994-11-30 1996-01-11 Harting Elektronik Gmbh Auswahlmagnet
US5669249A (en) * 1995-03-03 1997-09-23 Matec S.R.L. Magnetic selection ring for an elastic selector for needles in a circular knitting machine
EP0748887A1 (fr) * 1995-06-15 1996-12-18 Shima Seiki Manufacturing, Ltd. Dispositif de sélection d'aiguilles pour un métier à tricoter rectiligne
US5694792A (en) * 1995-06-15 1997-12-09 Shima Seiki Manufacturing, Ltd. Needle selection device of flat knitting machine
WO2003021022A1 (fr) * 2001-09-05 2003-03-13 Quantum Knitting Technologies S.A. Dispositif de selection d'aiguilles dans des machines a tricoter circulaires
ES2187369A1 (es) * 2001-09-05 2003-06-01 Quantum Knitting Tecnologies S Dispositivo para la seleccion de agujas en maquinas circulares de genero de punto.
WO2005098116A1 (fr) * 2004-03-30 2005-10-20 Shima Seiki Manufacturing, Ltd. Actionneur de sélection pour organe de tricotage
US7310977B2 (en) 2004-03-30 2007-12-25 Shima Seiki Manufacturing, Ltd. Selection actuator for knitting member
EP1643026A1 (fr) * 2004-10-02 2006-04-05 H. Stoll GmbH & Co. KG Système magnétique de sélection d'aiguilles pour produire des tissus tricotés à motifs
EP1948858B1 (fr) * 2005-11-18 2016-09-07 SANTONI S.p.A. Actionneur magnetique, particulierement destine aux dispositifs de selection des machines de tricotage-chaussant ou autres

Also Published As

Publication number Publication date
EP0474195B1 (fr) 1995-06-21
DE4028132C2 (de) 1994-06-30
EP0474195A3 (en) 1992-08-12
DE4028132A1 (de) 1992-03-12
DE59105772D1 (de) 1995-07-27

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