WO1997049852A1 - Machine textile comportant un systeme de selection pour elements de travail - Google Patents

Machine textile comportant un systeme de selection pour elements de travail Download PDF

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Publication number
WO1997049852A1
WO1997049852A1 PCT/EP1997/002589 EP9702589W WO9749852A1 WO 1997049852 A1 WO1997049852 A1 WO 1997049852A1 EP 9702589 W EP9702589 W EP 9702589W WO 9749852 A1 WO9749852 A1 WO 9749852A1
Authority
WO
WIPO (PCT)
Prior art keywords
textile machine
elements
magnet
machine according
holding
Prior art date
Application number
PCT/EP1997/002589
Other languages
German (de)
English (en)
Inventor
Boris Lukic
Original Assignee
Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & 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 Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. Kg filed Critical Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. Kg
Publication of WO1997049852A1 publication Critical patent/WO1997049852A1/fr

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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 textile machine, in particular a knitting machine, with controllable work elements, at least one machine part carrying the work elements, at least one work element selection device and at least one holding magnet rigidly attached to the machine part, which holds the work elements in their starting position.
  • Textile machines of this type in particular circular and flat knitting machines, are known for example from the publications DE 15 85 206 A2, DE 20 10 973 A2, DE 21 50 360 AI, DE 25 19 896 AI and DE 36 14 220 A2.
  • Arrangements of this type with controllable working elements and an electromagnetic control system are provided in particular for pattern control and as needle selection devices.
  • the needles are selected by acting directly on the individual knitting elements such as needles, sinkers, springs or the like, or by controlling the ferromagnetic parts of the specified knitting elements, the electromagnetic control system moving transversely to the needle output direction relative to the knitting elements located in the needle channels.
  • permanent magnets are provided which hold the working elements in their starting position for selection against the spring force of trigger springs, possibly after action by lock parts.
  • the permanent magnet arranged in the movable control system therefore slides on the working elements or moves over the working elements.
  • the permanent magnet slides along the working elements until the control system with its selection system reaches the knitting element that is to be selected.
  • This selection area is as wide as the working element and separated from the poles of the permanent magnet by a narrow gap, so that the magnetic field of the permanent magnet can be neutralized in this area by means of a control coil. Under the action of the spring force of a trigger spring, the selected working element is therefore removed from the selection system, while the other working elements are still held in position by the magnetic poles of the permanent magnet.
  • the magnetic flux in the work elements depends on the number of work elements still adhering or selected to the selection system, so that the electromagnetic attraction force acting on the work elements also changes.
  • the magnetic flux of the control coil with which the permanent magnet is compensated in the selection area must also be changed accordingly. From DE 36 14 220 A2 it is known to provide a Hall probe for measuring the current magnetic flux and to change the current applied to the control coil of the electromagnet as a function of the output signal of the Hall probe.
  • a textile machine in which an electromagnetic control system is guided over a needle bed, with stationary intermediate elements made of ferromagnetic material in one in each case in the needle bed for each needle channel or each needle or plate essentially magnetically non-excitable environment are provided in order to conduct a magnetic force flow through these intermediate elements onto the needle or the circuit board.
  • the production of such a control system or of such a needle bed is complex due to the stationary intermediate elements in the needle bed.
  • a knitting machine of the type mentioned in which a holding magnet holding the working elements in their starting position is rigidly attached to the needle bed.
  • the needle selection device has a controllable selection magnet and can be moved without contact over at least one outer surface of the working elements. If a working element is to be selected, the selection magnet becomes excites and generates a magnetic force flow which is opposite to the magnetic force flow of the holding magnet, so that the working element is released from the holding magnet.
  • the working element for example a circuit board or a needle, has a spring element or a resilient part for the pretension, which moves the working element by its resilient action when the holding force of the holding magnet is released by actuating the selection magnet from the holding magnet so that the feet of the working element can be gripped and controlled by corresponding lock parts.
  • This known arrangement has the disadvantages already described above in connection with other known textile machines that the force for releasing the respective working elements depends on how many working elements are still attached to the holding magnet. If there are little working elements adhering to the holding magnet, this is due to electromagnetic force flow passing through it is large, so that a larger magnetic force flow in the opposite direction has to be applied by the electromagnet in order to select one of the working elements still adhering to the holding magnet.
  • the known arrangement has proven itself very well in practice, uncertainties arise in individual cases with regard to a reliable selection of the working elements for the reasons mentioned.
  • the object of the invention is therefore to create a textile machine with a selection system with which, with a simple structure, a reliable selection without the risk. crosstalk is ensured even at high fineness and high working speeds.
  • this object is achieved according to the invention in that two holding magnets with different polarity are arranged next to one another, which hold the working elements in their respective starting positions in alternating order.
  • the use of two holding magnets with different polarities for adjacent work elements also has the property which is particularly advantageous for selection security that when a work element is selected, the adjacent work element adheres to the other holding magnet all the more reliably and reliably because the force flow of the selection magnet when selecting a working element increases the force flow or the holding force of the other holding magnet, due to the fact that the polarity of the force flow of the holding magnet with respect to the other holding magnet has the opposite pole direction.
  • the selection device according to the invention thus has the effect that the adjacent work element of a work element to be selected is kept even better in its starting position by the selection of the same.
  • the holding magnets are provided with projections in their support areas for the working elements.
  • the working element In the starting position, the working element therefore only ever rests on the projection of a holding magnet and has to the other holding magnet with opposite polarity a distance because the holding magnets are arranged next to each other and to each other so that the projections of one holding magnet lie between the projections of the other holding magnet. This makes it possible to release the respective working element from the holding magnet by applying a magnetic field opposite the respective holding magnet.
  • the working element selection device has a controllable selection magnet, which generates a magnetic force flow opposite the respective holding magnet for optional release of the respective needle. It is particularly advantageous if the working element selection device according to an alternative embodiment each has its own controllable selection magnet assigned to the respective holding magnet. In such an embodiment, there is therefore a separate selection magnet for each holding magnet, for example in the form of a controllable one
  • Electromagnets provided. While a reversal of the polarity of the force flow is required in each case for a device with only one selection magnet for the selection of adjacent working elements, which can possibly lead to delayed selection with regard to the hysteresis curve, it is possible with one selection magnet for each holder magnet to avoid such magnetic reversal of the polarity of the selection magnet, which is particularly advantageous in the case of high precision and high working speeds.
  • the working element selection device can be moved in a contact-free manner over at least one outer surface of the working elements.
  • the selection magnet or magnets are preferably electromagnets with at least one excitation coil through which a controlled current flows.
  • each working element is assigned a spring element that presses it into its working position when the working element is selected.
  • the holding magnets are arranged between the working elements and the spring elements.
  • DE-A which goes back to the same proprietor, with the same registration date.
  • a magnetic pole of the respective holding magnet faces the working elements and a counter-magnetic pole of the respective holding magnet faces the spring elements.
  • the working elements are preferably in contact with the pole of the respective holding magnet facing them, and in the case of selected working elements, the spring elements associated with these working elements are in contact with the counter-magnetic pole of the respective holding magnet.
  • the advantages of using two holding magnets with different polarization are combined with the advantages of the embodiment in which the holding magnets are arranged between the working elements and the spring elements.
  • the details, advantages and refinements of this preferred embodiment of the invention reference is again made to DE A to avoid repetitions, which in this respect is also made the content of the present documents.
  • the selection method according to the invention can be implemented particularly advantageously in connection with a knitting machine, in particular a flat knitting machine, in which needles or sinkers are provided as controllable working elements and needle beds are used as machine parts carrying working elements.
  • the holding magnets are preferably arranged on the side of the needle bed facing away from the needles or also on the side of the needle bed facing away from the needle bed comb.
  • the holding magnets are preferably attached to the needle bed via a fastening element made of non-magnetic material.
  • Fig. 1 is a schematic representation of an area of
  • FIG. 3 shows a cross section along the section line III-III shown in FIG. 1; and
  • FIG. 4 shows a schematic representation of an embodiment with separate selection magnets for each holding magnet.
  • two holding magnets 1, 2 are arranged parallel to one another in the longitudinal direction of a needle bed of a flat knitting machine.
  • the holding magnets 1, 2 have different magnetic polarities. If the polarity of the holding magnet 1 on its upper side represents a south pole S, the holding magnet 2 has a north pole N on its upper side, as indicated in the figures. Of course, the polarity of the holding magnets 1, 2 can also be reversed.
  • the holding magnet 1 has protrusions 4 which project upwards and which are repeated at twice the distance from the arrangement of the working elements or needles or sinkers 5. In a corresponding manner, the holding magnet 2 has projections 7, which are also repeated at twice the distance between the working elements.
  • the projections 4 of the holding magnet 1 are each offset by a needle distance from the projections 6 of the holding magnet 2 in the longitudinal direction of the needle bed 3, so that adjacent needles 5, 6 alternately each on projections 4 of the holding magnet 1 with S polarity and lie on projections 7 of the holding magnet 2 with N polarity when they are in the starting position.
  • a work element selection device 8 moves over the needles 5, 6 together with a lock slide (not shown), as is shown schematically in FIGS. 2 and 3.
  • This selection device has a controllable electromagnet which can be supplied with current in such a way that it either forms a magnetic south or north pole.
  • the electromagnet is controlled as the south pole, the magnetic field at the south pole of the holding magnet 1 is weakened or canceled, so that the needles 5 (see FIG. 2) are released from the projection 4 of the holding magnet 1 which represents the south pole and is selected.
  • a spring element, not shown in this case ensures that the needle 5 is raised upwards and a needle foot, not shown, comes into engagement with lock parts, as is customary.
  • the embodiment of the invention shown in FIG. 4 differs from the embodiments shown in FIGS. 1 to 3 only in that the working element selection device is in the form of two mutually separate selection magnets 10, 11, each of which contains a holding magnet 1 or 2 are assigned.
  • This embodiment makes it possible to select the needles or sinkers 5 lying on the projections 4 of the holding magnet 1 independently of the needles or sinkers 5 lying on the projections 7 of the holding magnet 2 because the two selection magnets 10 and 11 are separated from one another can be controlled.
  • the advantage of this embodiment is that it is not necessary to reverse the polarity of the selection magnet, as in the exemplary embodiment according to FIGS. 2 and 3, and therefore the control of the selection magnet is simpler and faster switching is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Abstract

L'invention concerne une machine textile, notamment une machine à tricoter, comportant des éléments de travail (5, 6) pilotables, au moins une partie (3) de la machine qui porte lesdits éléments de travail (5, 6), au moins un système de sélection des éléments de travail (8) et au moins un aimant de retenue fixé de manière rigide sur la partie (3) de la machine. On parvient à une sélection particulièrement fiable des éléments de travail (5, 6), même pour des travaux de grande finesse et des vitesses machine élevées, avec une complexité réduite en termes de structure et de commande, lorsque deux aimants de retenue (1, 2) de polarité différente sont disposés l'un à côté de l'autre, qui maintiennent les éléments de travail dans chacune de leurs positions initiales selon une séquence alternée.
PCT/EP1997/002589 1996-06-26 1997-05-21 Machine textile comportant un systeme de selection pour elements de travail WO1997049852A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19625653.4 1996-06-26
DE1996125653 DE19625653A1 (de) 1996-06-26 1996-06-26 Textilmaschine

Publications (1)

Publication Number Publication Date
WO1997049852A1 true WO1997049852A1 (fr) 1997-12-31

Family

ID=7798120

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/002589 WO1997049852A1 (fr) 1996-06-26 1997-05-21 Machine textile comportant un systeme de selection pour elements de travail

Country Status (2)

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DE (1) DE19625653A1 (fr)
WO (1) WO1997049852A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106929994A (zh) * 2017-03-31 2017-07-07 广东金禄科技股份有限公司 一种隔磁的选针器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1477890A (en) * 1973-11-22 1977-06-29 Toyoda Automatic Loom Works Circular knitting machine
CH600013A5 (en) * 1975-07-21 1978-06-15 Vyzk Vyvojovy Ustav Vseobe Circular knitter needle selection
EP0479371A1 (fr) * 1990-10-05 1992-04-08 MATEC S.r.l. Dispositif de sélection d'aiguilles à un métier à tricoter circulaire à poussoirs élastiques
EP0487152A1 (fr) * 1990-11-23 1992-05-27 MATEC S.r.l. Sélecteur électro-magnétique pourvu d'un nombre de positions de sélection

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2907008C2 (de) * 1979-02-23 1987-04-02 Sulzer Morat Gmbh, 7024 Filderstadt Steuermagnetsystem
DE4225655A1 (de) * 1992-08-03 1994-02-10 Schieber Universal Maschf Textilmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1477890A (en) * 1973-11-22 1977-06-29 Toyoda Automatic Loom Works Circular knitting machine
CH600013A5 (en) * 1975-07-21 1978-06-15 Vyzk Vyvojovy Ustav Vseobe Circular knitter needle selection
EP0479371A1 (fr) * 1990-10-05 1992-04-08 MATEC S.r.l. Dispositif de sélection d'aiguilles à un métier à tricoter circulaire à poussoirs élastiques
EP0487152A1 (fr) * 1990-11-23 1992-05-27 MATEC S.r.l. Sélecteur électro-magnétique pourvu d'un nombre de positions de sélection

Also Published As

Publication number Publication date
DE19625653A1 (de) 1998-01-08

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