EP0444726B1 - Dispositif positif de commande d'une ratière rotative pour métier à tisser - Google Patents

Dispositif positif de commande d'une ratière rotative pour métier à tisser Download PDF

Info

Publication number
EP0444726B1
EP0444726B1 EP91200157A EP91200157A EP0444726B1 EP 0444726 B1 EP0444726 B1 EP 0444726B1 EP 91200157 A EP91200157 A EP 91200157A EP 91200157 A EP91200157 A EP 91200157A EP 0444726 B1 EP0444726 B1 EP 0444726B1
Authority
EP
European Patent Office
Prior art keywords
levers
governing
pair
controlling
fact
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.)
Expired - Lifetime
Application number
EP91200157A
Other languages
German (de)
English (en)
Other versions
EP0444726A1 (fr
Inventor
Giovanni Beretta
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.)
BREVTEX SA
Original Assignee
BREVTEX SA
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 BREVTEX SA filed Critical BREVTEX SA
Publication of EP0444726A1 publication Critical patent/EP0444726A1/fr
Application granted granted Critical
Publication of EP0444726B1 publication Critical patent/EP0444726B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies

Definitions

  • the subject of the present invention is a device for governing and controlling a rotary dobby for actuating heddle frames of looms.
  • the governing and control device must, in correspondence with each stop of the main shaft, be capable of making the rotary shaft locked to, or disengaged from, said eccentric which actuates the movement lever mechanisms for the frames, thereby determining for them, in one case, the raising or lowering and, in the other case, the maintenance of the preceding position.
  • EP- 0 185 780 Another example of device for controlling a rotary dobby according to the prior art is disclosed into EP- 0 185 780.
  • the technical problem therefore arises of creating a device for governing and controlling a rotary dobby for actuating the positioning levers for the frames of the heddles of a loom, the device being equipped with controls and gear, blocking and positive safety means which assure the correct positioning and mutual engagement of the movable parts, both during the rotation with the shaft that determines the variation in the position of the frame and in the neutral or idling position with maintenance of the position adopted by the frame in the preceding revolution.
  • Said safety means must, furthermore, contribute to the blocking of the rotation, when each final position corresponding to the half-revolution through 180° is reached.
  • Said device which must revolve at high speed, must furthermore be of very small size and mass, must make possible rapid programming, actuating the desired command during the very short stopping time of the main shaft; and it must be easy and economical to assemble and maintain, thus enabling the repair times to be reduced to a minimum.
  • the device according to this invention is composed of a rotary shaft 1, on which is keyed a disc 2, rotating integrally with the shaft and equipped with two diametrally opposite notches 2a and 2b; on said disc there is concentrically mounted a sleeve 3, on which an eccentric ring 4 can revolve, bounded in its circumferential external surface by a further sleeve 5, which allows it to rotate relative to the oscillating external body 4a of the eccentric 4 connected to an extension 4b pivoted on the actuating bar 6 for the frame of the loom, not illustrated in the Figure.
  • a ring 7 is also fixed to the oscillating body 4a by rivets 7c, this ring possessing two notches 7a of substantially trapezoidal shape, diametrally opposite each other, on its internal surface, and two basically semicircular notches 7b on its external surface, diametrally opposite each other and on an axis perpendicular to the axis of the internal notches 7a.
  • the device of this invention comprises, furthermore, a first pair of levers 9 and 10, connected to the eccentric 4 at the pivots 9a and 10a respectively, and a second pair of levers 13 and 14, these being attached to the eccentric ring 4 at the respective end pivots 13a and 14a.
  • Each lever of said first pair has one of its two ends free, facing inwards and respectively equipped with a radially orientated took 9b and 10b, and also a set of cylindrical gear teeth 9c and 10c respectively, orientated tangentially; said sets of teeth are adapted for engaging each other, in this way forming one single radial tooth 17, having twice the width of the two teeth 9b and 10b, and adapted for engaging with the notch 2a or 2b of the disc 2.
  • Said tooth 17 has, moreover, sides suitably shaped for obtaining optimum positioning and engagement with the notch 2a and 2b.
  • each lever is, in contrast, equipped with a roller 9d and 10d, and is adapted for receiving a thrust command from a programmer element 13 and for rotating freely on the front annular surface of the oscillating body 4a in the case in which the levers 9 and 10 are engaged with the disc 2, or for engaging with the semicircular notch 7b in the ring 7 under the thrust action from the programmer 13, which itself produces said thrust by small pistons equipped with permanent magnet heads, themselves known, and indicated schematically in the Figure by two arrows A and B, which engage with said rollers 9d and 10d.
  • the levers 13 and 14 of said second pair have, in turn, a free end shaped as a set of cylindrical gear teeth 13c and 14c, orientated substantially tangentially and adapted for engaging with each other; said end possesses, in addition, an upper tooth 13b and 14b, adapted for engaging radially into the notch 7a of the ring 7.
  • both the pairs of levers 9, 10, 13, 14 have an auxiliary spring or the like 11 and 15, respectively, disposed horizontally; the ends of each spring are attached to the levers of the same pair; said springs exert a restoring action which promotes rotation in the radial centripetal direction of the levers of the first pair and centrifugal radial rotation of the levers of the second pair.
  • Fig. 4c there is shown a programming example contrary to that just described.
  • the programmer 13 exerts a thrust action on the end 10d of the lever 10, as a consequence of which both the end 10d with a roller of the lever 10 and also the end 9d of the lever 9, caused to rotate by the sets of teeth 9c, 10c, engage into the corresponding notches 7b, thus locking onto the ring 7, in this way overcoming the restoring action of the spring 11 and forcing the two teeth 9b and 10b to disengage from the notch 2a, by rising until they bear against the levers 13 and 14, on which they exert a thrust force which promotes blocking of the oscillating body 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Paper (AREA)
  • Rotational Drive Of Disk (AREA)

Claims (7)

  1. Dispositif pour commander et contrôler une ratière rotative afin d'actionner les cadres des lices de métiers à tisser, le dispositif comprenant un arbre de commande (1), un disque (2) verrouillé en rotation avec ledit arbre et un excentrique, composé d'une bague excentrique (4) calée sur l'arbre (1), avec lequel elle peut tourner par rapport à un corps externe traversant (4a) fixé à la barre d'actionnement pour les bâtis, le dispositif comprenant une première (9, 10) et une seconde (13, 14) paires de leviers, montées fermement à pivotement sur la bague excentrique rotative (4) et prévues pour coopérer radialement l'une avec l'autre, une extrémité libre de ladite première et de ladite seconde paires de leviers étant respectivement prévue pour venir en prise avec ledit disque rotatif (2) et avec le corps traversant (4a), l'autre extrémité libre (9d, 10d) des leviers de la première paire étant en outre prévue pour recevoir une quelconque action de commande d'un organe de programmation externe (13), caractérisé par le fait que les leviers (9, 10) de ladite première paire présentent une de leurs deux extrémités munie d'une dent (9b, 10b) orientée de manière sensiblement radiale vers le centre de l'excentrique (4) et un jeu de dents d'engrenage cylindriques (9c, 10c), orientées de manière pratiquement tangentielle et prévues pour rendre possible une mise en prise réciproque des deux leviers l'un avec l'autre de telle manière que la rotation effectuée par l'un des deux leviers amène une rotation identique de l'autre levier dans le sens opposé, et par le fait que la rotation des deux leviers (9, 10) vers le centre de l'arbre de commande (1), au moyen dudit jeu de dents d'engrenage, amène les deux dents (9b et 10b) fermement ensemble pour former une dent unique (17) présentant une largeur double de celle de chacune desdites deux dents.
  2. Dispositif pour commander et contrôler une ratière rotative selon la revendication 1, caractérisé par le fait que l'organe de programmation incorpore des moyens d'actionnement équipés d'aimants permanents, qui exercent une action de poussée ou une action de rappel sur les extrémités libres des leviers de la première paire, en provoquant une rotation desdits leviers dans un sens centrifuge ou centripète.
  3. Dispositif pour commander et contrôler une ratière rotative selon les revendications précédentes, caractérisé par le fait que des moyens de rappel auxiliaires (11, 15) sont appliqués entre les leviers de chacune desdites paires de leviers, dans le but de favoriser la rotation dans la direction radiale des première et seconde paires de leviers, respectivement, dans un sens centripète et dans un sens centrifuge.
  4. Dispositif pour commander et contrôler une ratière rotative selon la revendication 1, caractérisé par le fait que l'autre extrémité libre des leviers (9, 10) de ladite première paire présente un élément coulissant monté à pivotement dans la direction radiale.
  5. Dispositif pour commander et contrôler une ratière rotative selon la revendication 1, caractérisé par le fait que ledit disque (2) présente deux encoches (2a, 2b), opposées diamétralement l'une à l'autre par rapport au centre de rotation de l'arbre (1), et prévues pour recevoir ladite double dent (17).
  6. Dispositif pour commander et contrôler une ratière rotative selon la revendication 1, caractérisé par le fait que lesdites encoches (2a, 2b) et ladite dent (17) présentent des flans et des parois conformées respectivement pour courber ou incliner des profils permettant de favoriser une mise en prise sans jeu de la dent dans l'encoche.
  7. Dispositif pour commander et contrôler une ratière rotative selon la revendication 1, caractérisé par le fait que ledit corps traversant (4a) présente une bague interne (7) équipée de deux encoches (7a) disposées de manière diamétralement opposées l'une à l'autre sur la surface interne, et deux encoches (7b) ou analogue disposées sur sa surface externe, diamétralement opposées l'une à l'autre et sur un axe perpendiculaire à l'axe des encoches internes (7a), qui sont prévues pour venir en prise avec les dents (13b, 14b) des leviers de ladite seconde paire, lesdites encoches externes, à leur tour, étant adaptées pour venir en prise avec l'élément coulissant (9d, 10d) monté à l'extrémité des leviers (9, 10) de ladite première paire.
EP91200157A 1990-02-05 1991-01-26 Dispositif positif de commande d'une ratière rotative pour métier à tisser Expired - Lifetime EP0444726B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1926290 1990-02-05
IT01926290A IT1237968B (it) 1990-02-05 1990-02-05 Dispositivo desmodromico per il comando e controllo di una ratiera rotativa in macchine tessili

Publications (2)

Publication Number Publication Date
EP0444726A1 EP0444726A1 (fr) 1991-09-04
EP0444726B1 true EP0444726B1 (fr) 1996-04-17

Family

ID=11156217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91200157A Expired - Lifetime EP0444726B1 (fr) 1990-02-05 1991-01-26 Dispositif positif de commande d'une ratière rotative pour métier à tisser

Country Status (5)

Country Link
EP (1) EP0444726B1 (fr)
AT (1) ATE136953T1 (fr)
DE (1) DE69118742T2 (fr)
ES (1) ES2085413T3 (fr)
IT (1) IT1237968B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1251107B (it) * 1991-07-25 1995-05-04 Costantino Vinciguerra Perfezionamenti in una ratiera rotativa ad altissima velocita'
IT1260291B (it) * 1992-12-18 1996-04-03 Lucio Burigana Ratiera rotativa

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050160A1 (fr) * 1980-10-10 1982-04-28 GebràœDer Sulzer Aktiengesellschaft Dispositif d'accouplement pour la commande des cadres d'un métier à tisser
DE3264016D1 (en) * 1981-06-26 1985-07-11 Textilma Ag Coupling device, particularly for looms
FR2515702A1 (fr) * 1981-10-29 1983-05-06 Staubli Sa Ets Perfectionnements aux ratieres rotatives
DE3476900D1 (en) * 1984-12-18 1989-04-06 Staeubli Ag Rotary dobby
DE3528504C2 (de) * 1985-08-08 1993-10-07 Kaiser Gmbh & Co Kg Steuervorrichtung einer Rotations-Schaftmaschine
CH675734A5 (en) * 1986-03-22 1990-10-31 Kaiser Gmbh & Co Kg Loom shaft control

Also Published As

Publication number Publication date
IT9019262A1 (it) 1991-08-05
ES2085413T3 (es) 1996-06-01
IT1237968B (it) 1993-06-19
IT9019262A0 (it) 1990-02-05
EP0444726A1 (fr) 1991-09-04
DE69118742T2 (de) 1996-11-28
DE69118742D1 (de) 1996-05-23
ATE136953T1 (de) 1996-05-15

Similar Documents

Publication Publication Date Title
EP0444726B1 (fr) Dispositif positif de commande d'une ratière rotative pour métier à tisser
KR19980064814A (ko) 로터리 도비와 그러한 도비를 구비한 제직기
EP0525862B1 (fr) Améliorations à une ratière rotative à grande vitesse
US5479964A (en) Rotary dobby having connecting rod automatically disengagable from drive shaft
EP0485009B1 (fr) Dispositif de commande d'une ratière rotative pour métier à tisser, comprenant un levier à came et des butées associées
JPH0327652B2 (fr)
EP0675218A1 (fr) Méthode et dispositif de commande de la formation de la foule pour métier à tisser
US4730641A (en) Rotational dobby
JPH0153371B2 (fr)
JPH0347338B2 (fr)
GB2051299A (en) Apparatus for coupling and uncoupling of a kinematic mechanism in which a stepwise rotary motion is imparted
US4727910A (en) Drive connection for a reciprocating a connecting rod from a drive shaft through an eccentric cam
EP0467444B1 (fr) Dispositif d'actionnement pour la programmation des ratières rotatives sur métiers à tisser
US4614211A (en) Dobby
JPH0331817B2 (fr)
EP1191137B1 (fr) Accouplement pour la connexion rotative des arbres d'entraînement des ratières et des métiers à tisser
EP1251194B1 (fr) Dispositif amélioré pour la programmation des ratières rotatives dans les métiers à tisser
US4563911A (en) Programmer control device
JPS5936012B2 (ja) 回転ドビ−機の制御装置
US4298031A (en) Shed forming device for looms
US2499679A (en) Drive for the axial motion of the camshaft on ordinary straight-bar knitting machines
EP0086999A1 (fr) Dispositif pour la recherche du pas de la mécanique d'armature dans le métier à tisser
US4422480A (en) Loom-heddle selector
SU406701A1 (ru) Устройство для блокировки
SU1447950A1 (ru) Ротационна ремизоподъемна каретка к ткацкому станку

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19920220

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BREVTEX SA

17Q First examination report despatched

Effective date: 19941018

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19960417

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19960417

Ref country code: AT

Effective date: 19960417

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19960417

Ref country code: DK

Effective date: 19960417

REF Corresponds to:

Ref document number: 136953

Country of ref document: AT

Date of ref document: 19960515

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: DR. LUSUARDI AG

REF Corresponds to:

Ref document number: 69118742

Country of ref document: DE

Date of ref document: 19960523

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2085413

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19960717

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19970126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970127

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19970131

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970131

Ref country code: LI

Effective date: 19970131

Ref country code: CH

Effective date: 19970131

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: S.A. BREVTEX

Effective date: 19970131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19970930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19971001

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20020916