EP1936014B1 - Elektromagnetblock und elektromagnetische Auswahlvorrichtung für die Bewegung von Webschäften in Schaftmaschinen und anderen Vorrichtungen zur Bildung von Fächern - Google Patents

Elektromagnetblock und elektromagnetische Auswahlvorrichtung für die Bewegung von Webschäften in Schaftmaschinen und anderen Vorrichtungen zur Bildung von Fächern Download PDF

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Publication number
EP1936014B1
EP1936014B1 EP07356177A EP07356177A EP1936014B1 EP 1936014 B1 EP1936014 B1 EP 1936014B1 EP 07356177 A EP07356177 A EP 07356177A EP 07356177 A EP07356177 A EP 07356177A EP 1936014 B1 EP1936014 B1 EP 1936014B1
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EP
European Patent Office
Prior art keywords
electromagnet
pole
abutment
abutment face
face
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Application number
EP07356177A
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English (en)
French (fr)
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EP1936014A1 (de
Inventor
Patrick Ltis
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Staubli Faverges SCA
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Staubli Faverges SCA
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Publication of EP1936014A1 publication Critical patent/EP1936014A1/de
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D03C1/14—Features common to dobbies of different types
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/14—Pivoting armatures

Definitions

  • the present invention relates to dobby and other shedding machines on weaving machines. More particularly, the present invention relates to an electromagnet block for the devices which ensure the electromagnetic selection of the movement of the blades of such machines according to the weave to be made on the fabric being weaved. The invention also relates to a device for electromagnetically selecting the movement of the blades of a shedding machine, to a crowd forming mechanism, in particular a dobby, and to a loom.
  • EP-A-0 851 047 discloses such an electromagnetically selectable actuating device comprising a series of electromagnets, in number equal to that of the blades of the mechanics, that is to say, amplifying systems and stringer frames carried by the machine. weave.
  • the electromagnets, fed through the reading apparatus according to the armor program, are assembled on a single frame which is animated by an oscillating movement linked to that of the mechanics and which carries, at the level of each blade , a pivoting selector associated with elastic means which tend to separate it from the attraction poles of the electromagnet considered.
  • Each selector carries a movable armature, one end of which remains in permanent contact with an area close to a first pole of the electromagnet, while another end is movable towards and away from the second pole of the electromagnet.
  • electromagnet according to its power supply by the reading device, with a very small air gap value.
  • it is known to machine a groove at the second pole of the electromagnet, to ensure the existence of a gap even in the supported position of the movable armature against the fixed armature of the electromagnet and thus reduce the remanence of the magnetic circuit.
  • the invention intends to remedy more particularly by proposing an electromagnet block which eliminates the risk of bonding between the movable armature and the fixed armature of each electromagnet.
  • the subject of the invention is an electromagnet unit for an electromagnetic selection device for the movement of the dobby blades and other crowd forming mechanisms, comprising for each blade an electromagnet with which is associated a pivoting selector equipped with a movable armature of which a substantially flat face is adapted to come against an abutment face of the fixed armature of the electromagnet, the electromagnet being powered according to the armor desired for the current fabric embodiment, the abutment face of the electromagnet comprising a stop plate at which open first and second poles of the electromagnet, characterized in that the stop plate has a protruding portion relative to to a main portion of the plate and to the first and second poles, this projecting portion being arranged in the vicinity of a pole, between this pole and an edge of the abutment face, so as to be adapted to receive in support one end of the movable armature corresponding to this pole, while the main portion receives another end of the movable armature corresponding to the other
  • the invention also relates to a device for electromagnetically selecting the movement of the dobby blades and other crowd forming mechanisms, comprising an electromagnet block as described above, which comprises for each blade an electromagnet to which is associated a pivoting selector equipped with a movable armature whose substantially flat face is adapted to come against the abutment face of the electromagnet, the movable armature having a first and a second opposite ends intended to cooperate with the face abutment respectively in the vicinity of the first and second poles, the movable armature being articulated on the selector by the second end oriented towards the pivot axis of the selector, while elastic return means are able to act on the first end to move it away from the body of the selector, the elastic return means being in addition, by reaction at the level of the ax e of pivoting of the selector, able to move the second end away from the abutment face.
  • the subject of the invention is a shedding formation mechanism, in particular a dobby, comprising an electromagnet block or an electromagnetic selection device as described above.
  • the subject of the invention is a loom comprising such a mechanism for forming the crowd.
  • the electromagnetic selection device represented on the figure 1 is mounted on an oscillating frame, formed by two lateral arms 1 connected by a longitudinal cross member 2 and comprising an axis 10 which extends parallel to this cross member 2 to connect the two arms 1.
  • the frame 1-2 is driven by a cyclic oscillation movement around an axis not shown perpendicular to the plane of the figure 1 As shown by the arrow F 1 of the figure 1 .
  • the cross member 2 of the oscillating frame 1-2 supports an electromagnet unit 3 which encloses all the control electromagnets 4 supplied by the dobby unit.
  • an electromagnet unit 3 which encloses all the control electromagnets 4 supplied by the dobby unit.
  • a pivoting selector 9 mounted on the axis 10.
  • the selectors 9 of the device are arranged side by side on the axis 10, with a set minimal so as to be arranged in front of the poles of attraction of the different electromagnets 4.
  • Each electromagnet 4 comprises a U-shaped magnetic core 6, a branch of which is surrounded by a coil 5.
  • the cores 6 are arranged side by side in a profile 7, so that the ends of the branches of each core 6, that is to say the poles 61 and 62 of each electromagnet 4, open at the same face 3A of the block 3, through a stop plate 8 attached to the profile 7.
  • the stop plate 8 and the poles 61 and 62 of each electromagnet 4 form an abutment face 4A of the electromagnet.
  • each elementary electromagnet 4 of the block 3 is associated with an elementary stop plate 8. More specifically, each elementary abutment plate 8 is made of plastics material and provided with two lugs intended to be clipped into a not shown groove of the profile 7. The branches of each elementary electromagnet 4 open towards the outside of the profile 7 to through this groove and two corresponding recesses of the associated elementary thrust plate 8. As visible at figure 2 the supply wires of the coils 5 of the electromagnets 4 are grouped in a cable and connected to the reading device. After the bundling of the supply wires of the coils 5 in this cable, the section 7 is filled with resin.
  • each electromagnet 4 is machined so as to provide two stepped zones. More specifically, in this embodiment, the assembly of the elementary abutment plates 8 is machined during a single operation, so that each abutment plate 8 comprises a first portion 81, which is located in the same plane P 1 that the poles 61 and 62 of each core 6, and a second portion 82, which protrudes from the first portion 81 and the poles 61 and 62, in a second plane P 2 substantially parallel to the plane P 1 .
  • the protruding portion 82 is arranged on an edge 42 of the abutment face 4A of each electromagnet 4, in the vicinity of the pole 62 corresponding to the branch of the core 6 around which the coil 5 is wound.
  • Each selector 9 is intended to provide selective control of one or the other of two rocking levers 11 and 12 which act as control members and ensure, in known manner, the actuation of the blade considered dobby.
  • each selector 9 comprises, opposite the pivot axis 10, a tip 97 adapted to act selectively on a tail 111 of the lever 11 or a tail 121 of the lever 12, so as to tilt the corresponding lever against unrepresented elastic means which hold it in abutment against a fixed stop 14.
  • each selector 9 is made by injection and molding of a non-magnetic material, in which the end of the tip 97, made of steel, is directly embedded.
  • Each selector 9 is equipped with a movable armature 13, formed by a plate of ferromagnetic material, which is housed in a cavity 91 of the body of the selector 9 turned towards the corresponding electromagnet 4.
  • the end 132 of the wafer 13 which is adjacent to the pivot axis 10 of the selector 9 is articulated inside the cavity 91 on a pivot 93, while the opposite end 131 of the wafer 13 receives the permanent action of a spring 15 engaged in a blind housing 95 of the body of the selector 9.
  • the plate 13 has a substantially planar face 13A which is intended to come against the abutment face 4A of the corresponding electromagnet 4.
  • the face 13A has grooves that help reduce the risk of bonding between this face and the abutment face 4A.
  • a vertex of the gap E is defined by the contact of the end 131 of the wafer 13 against the portion 81, in the vicinity of the edge 41 of the abutment face 4A.
  • e 1 the average thickness of the air gap E at the pole 61
  • e 2 the average thickness of the air gap E at the pole 62.
  • the tip 97 of the selector 9 is disposed opposite the tail 111 of the rocking lever 11, so that when in its oscillating movement the frame 1-2 operates the lowering of the block 3 and the axis 10, the tip 97 bears against the tail 111 which is thus spaced from the fixed stop 14.
  • the rocking lever 11 is then actuated for the control of the blade considered dobby.
  • the magnetic flux generated by the fixed armature of the electromagnet 4 exerts the attraction of the moving armature or plate 13.
  • L end 132 of the plate 13 then tilts against the portion 82 of the abutment plate 8.
  • the protruding portion 82 thus forms a stop bead for the end 132 of the wafer 13.
  • the tilting of the wafer 13 around the pivot 93 causes the pivoting of the selector 9 which reaches the position visible to Figures 4 and 5 .
  • the tip 97 is then disposed opposite the shank 121 of the rocking lever 12, which is thus actuated during the oscillating movement of the frame 1-2.
  • the spring 15 automatically switches the selector 9 from the position in which the plate 13 is against the abutment face 4A, visible to the Figures 4 and 5 , to the rest position of figures 1 and 3 .
  • an air gap E ' is held between the face 13A of the plate 13 and the abutment face 4A of the electromagnet 4 when the plate 13 is in position against the abutment face 4A.
  • This gap E ' has, like the air gap E of the rest position, a wedge shape whose apex is defined by the contact of the end 131 against the portion 81 in the vicinity of the edge 41.
  • the average thickness of the air gap is noted e 3 E 'at the pole 61 and E 4 the mean thickness of the air gap E' at the pole 62.
  • the thickness e 4 is chosen with a value similar to the depth of the groove formed at a pole in the state of the art, for example of the order of 0.1 mm.
  • the gap E 'defined when the plate 13 is in position against the abutment face 4A then allows, similarly to the groove of the state of the art, to avoid the constitution of a fully ferromagnetic magnetic circuit when the coil 5 is powered. Thus, the remanence of the magnetic circuit is limited and does not prevent the immediate return of the wafer 13 to its rest position at the power failure of the coil 5.
  • the attractive force exerted by the fixed armature of the electromagnet 4 on the wafer 13 depends on the thicknesses e 1 and e 2 of the gap E defined in the rest position.
  • a machining adapted at the poles 61 and 62 makes it possible to obtain values of thicknesses e 1 and e 2 which are very small.
  • the effect generated by the magnetic flux is then very important, which makes it possible to use electromagnets of reduced dimensions and low consumption.
  • the thickness e 2 is greater than the thickness e 1 .
  • the most important attractive force is obtained by placing the coil 5 around the branch of the core 6 which corresponds to the thickness e 2 , that is to say to the greatest thickness, obtained at the pole closer to the protruding portion 82.
  • the particular geometry of the device creates an amplifying effect and allows a large displacement at the tip 97.
  • the portion 81 of the abutment plate 8 and the poles 61 and 62 are machined in the same plane P 1 . It is thus possible to reduce the dispersion on the values of the gap thicknesses between the wafer 13 and the abutment face 4A, and to reduce the uncertainty on the force of attraction exerted by the electromagnet 4 on the wafer. 13. Moreover, thanks in the staggered form of the stop plate 8, the face 13A of the wafer 13 can bear against the abutment face 4A only at the edges 41 and 42. In particular, there is no contact between the plate 13 and each pole 61 or 62, which avoids possible problems of cohesion between the legs of the core 6 and the plate 8, resulting from repeated shocks on the poles 61 and 62.
  • the abutment plate 8 is not monobloc, but has two parts 8a and 8b distinct.
  • the part 8a which forms the edge 41 of the abutment face 4A, is intended to be in permanent contact with the face 13A of the wafer 13.
  • This part 8a is then advantageously made of a relatively hard material and suitable for friction, such as a shade of plastic material comprising Teflon.
  • Part 8b which forms the edge 42 of the abutment face 4A and has the projecting portion 82, is intended to receive an episodic support of the end 132 of the wafer 13.
  • This part 8b is then advantageously constituted in a shock-absorbing material, capable of damping the impact of abutting of the end 132, such as a shade of plastic material of modulus of elasticity lower than that of the shade used for part 8a.
  • the portion 8b which includes the projecting portion 82 is made of a softer material than the constituent material of the other part 8a.
  • the invention is not limited to the examples described and shown.
  • the abutment plate 8 may be common to all the electromagnets 4 of the block 3 and constituted in one piece intended to be attached to the section 7.
  • an electromagnet block and an electromagnetic selection device according to the invention can be applied to mechanical other than rotating dies, including dobby scales, or all other mechanisms of formation of the crowd.
  • the use of such an electromagnet block is not limited to an oscillating reading but can also be envisaged in the case of a fixed magnet electromagnet reading, as described in EP-A-1,382,725 .
  • the use of an electromagnet block according to the invention similarly guarantees a wedge-shaped air gap and the absence of shocks at the two poles.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Knitting Machines (AREA)

Claims (12)

  1. Elektromagnetblock für eine elektromagnetische Auswahlvorrichtung der Bewegung der Schäfte von Schaftmaschinen und anderen Fachbildungsmechanismen, für jeden Schaft einen Elektromagneten (4) umfassend, dem ein Schwenkauswahlelement (9) zugeordnet ist, das mit einem beweglichen Anker (13) ausgerüstet ist, dessen eine im Wesentlichen ebene Fläche (13A) geeignet ist, gegen eine Anschlagfläche (4A) des feststehenden Ankers des Elektromagneten (4) zu kommen, wobei der Elektromagnet (4) abhängig von der gewünschten Bindung für das zu realisierende Gewebe versorgt wird und die Anschlagfläche (4A) des Elektromagneten (4) eine Anschlagplatte (8) umfasst, an deren Niveau ein erster (61) und zweiter (62) Pol des Elektromagneten (4) münden, dadurch gekennzeichnet, dass die Anschlagplatte (8) einen in Bezug auf einen Hauptbereich (81) der Platte und des ersten (61) und zweiten (62) Pols hervorspringenden Bereich (82) aufweist, wobei dieser hervorspringende Bereich (82) in der Nähe eines Pols zwischen diesem Pol und einem Rand der Anschlagfläche (4A) derart angeordnet ist, dass er geeignet ist, in Abstützung ein diesem Pol entsprechendes Ende (132) des beweglichen Ankers (13) aufzunehmen, wobei der Hauptbereich (81) ein anderes, dem anderen Pol entsprechendes Ende (131) des beweglichen Ankers aufnimmt.
  2. Elektromagnetblock nach Anspruch 1, dadurch gekennzeichnet, dass der Hauptbereich (81) der Anschlagplatte (8) eine erste Ebene (P1) der Anschlagfläche (4A) begrenzt, wobei die Pole (61, 62) zu dieser ersten Ebene (P1) gehören.
  3. Elektromagnetblock nach Anspruch 2, dadurch gekennzeichnet, dass der hervorspringende Bereich (82) der Anschlagplatte (8) eine zweite Ebene (P2) der Anschlagfläche (4A), im Wesentlichen parallel zur ersten Ebene (P1) begrenzt.
  4. Elektromagnetblock nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Anschlagplatte (8) einstückig ist.
  5. Elektromagnetblock nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Anschlagplatte (8) einen ersten (8a) und einen zweiten (8b) Teil umfasst, die aus Materialien mit unterschiedlichen mechanischen Eigenschaften bestehen, wobei der Teil (8b), der den hervorspringenden Bereich (82) umfasst, aus einem weicheren Material besteht, als das wesentliche Material des anderen Teils (8a).
  6. Elektromagnetblock nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeder Elektromagnet (4) einen Magnetkern (6) umfasst, von dem ein Schenkel von einer Spule (5) eingefasst wird, wobei dieser Schenkel derjenige ist, der den am nächsten zu dem hervorspringenden Bereich (82) der Anschlagplatte (8) liegende Pol ist.
  7. Elektromagnetische Auswahlvorrichtung der Bewegung der Schäfte von Schaftmaschinen und anderen Fachbildungsmechanismen, dadurch gekennzeichnet, dass sie einen Elektromagnetblock nach einem beliebigen der vorhergehenden Ansprüche umfasst, der für jeden Schaft einen Elektromagneten (4) umfasst, dem ein Schwenkauswahlelement (9) zugeordnet ist, der mit einem beweglichen Anker (13) ausgerüstet ist, dessen im Wesentlichen ebene Fläche (13A) geeignet ist, gegen die Anschlagfläche (4A) des Elektromagneten (4) zu kommen, wobei der bewegliche Anker (13) ein erstes (131) und ein zweites (132) Ende umfasst, die entgegengesetzt zueinander sind und vorgesehen sind, mit der Anschlagfläche (4A) jeweils in der Nähe des ersten (61) und des zweiten (62) Pols zusammenzuarbeiten, wobei der bewegliche Anker (13) an dem Auswahlelement (9) über das zweite Ende (132) angelenkt ist, das in Richtung der Schwenkachse (10) des Auswahlelements orientiert ist, wobei Mittel zur elastischen Rückstellung (15) geeignet sind, auf das erste Ende (131) zu wirken, um es von dem Körper des Auswahlelements zu entfernen, wobei die elastischen Rückstellmittel darüber hinaus geeignet sind, durch Reaktion im Bereich der Schwenkachse (10) des Auswahlelements das zweite Ende (132) in Bezug auf die Anschlagfläche (4A) zu entfernen.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass der hervorspringende Bereich (82) der Anschlagplatte (8) in der Nähe des zweiten Pols (62) zwischen dem Pol und dem korrespondierenden Rand (42) der Anschlagfläche (4A) angeordnet ist, derart, dass in Abstützung das zweite Ende (132) des beweglichen Ankers (13) aufgenommen wird.
  9. Vorrichtung nach einem beliebigen der Ansprüche 7 oder 8, dadurch gekennzeichnet, dass der bewegliche Anker (13) in Abstützung gegen die Anschlagfläche (4A) mit dieser Anschlagfläche einen Luftspalt (E') in Form eines Keils begrenzt, dessen Spitze durch die Abstützung des beweglichen Endes gegen den Hauptbereich (81) der Anschlagplatte (8) bestimmt ist.
  10. Vorrichtung nach einem beliebigen der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass der bewegliche Anker (13) in Abstützung gegen die Anschlagfläche (4A) nicht in Kontakt mit den Polen (61, 62) ist.
  11. Fachbildungsmechanismus, insbesondere Schaftmaschine, dadurch gekennzeichnet, dass sie einen Elektromagnetblock nach einem beliebigen der Ansprüche 1 bis 6 oder eine elektromagnetische Auswahlvorrichtung nach einem beliebigen der Ansprüche 7 bis 10 umfasst.
  12. Webmaschine, dadurch gekennzeichnet, dass sie einen Mechanismus zur Fachbildung nach dem Anspruch 11 umfasst.
EP07356177A 2006-12-21 2007-12-20 Elektromagnetblock und elektromagnetische Auswahlvorrichtung für die Bewegung von Webschäften in Schaftmaschinen und anderen Vorrichtungen zur Bildung von Fächern Active EP1936014B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0611196A FR2910494B1 (fr) 2006-12-21 2006-12-21 Bloc electro-aimant et dispositif de selection electromagnetique du mouvement des lames de ratieres et autres mecaniques de formation de la foule

Publications (2)

Publication Number Publication Date
EP1936014A1 EP1936014A1 (de) 2008-06-25
EP1936014B1 true EP1936014B1 (de) 2010-01-27

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EP07356177A Active EP1936014B1 (de) 2006-12-21 2007-12-20 Elektromagnetblock und elektromagnetische Auswahlvorrichtung für die Bewegung von Webschäften in Schaftmaschinen und anderen Vorrichtungen zur Bildung von Fächern

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EP (1) EP1936014B1 (de)
CN (1) CN101275321B (de)
DE (1) DE602007004560D1 (de)
FR (1) FR2910494B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2968317A1 (fr) * 2010-12-06 2012-06-08 Staubli Sa Ets Dispositif de selection pour le controle d'une ratiere, ensemble de selection et ratiere controlee par un tel dispositif de selection

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515703B1 (de) * 1981-11-05 1983-12-09 Staubli Sa Ets
IT1252301B (it) * 1991-11-15 1995-06-08 Nuovo Pignone Spa Sistema di controllo automatico per ratiera rotativa elettronica
JP3425983B2 (ja) * 1992-12-25 2003-07-14 株式会社山田ドビー ドビー
FR2757884B1 (fr) * 1996-12-31 1999-02-19 Staubli Sa Ets Dispositif d'actionnement a selection electromagnetique pour la commande des ratieres et autres mecaniques de tissage
FR2842538B1 (fr) 2002-07-16 2004-10-29 Staubli Sa Ets Ratiere rotative pour metier a tisser, et metier a tisser equipe d'une telle ratiere

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FR2910494B1 (fr) 2009-01-30
EP1936014A1 (de) 2008-06-25
CN101275321B (zh) 2011-08-03
DE602007004560D1 (de) 2010-03-18
FR2910494A1 (fr) 2008-06-27
CN101275321A (zh) 2008-10-01

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