EP0444726A1 - Dispositif positif de commande d'une ratière rotative pour mÀ©tier à tisser - Google Patents

Dispositif positif de commande d'une ratière rotative pour mÀ©tier à tisser Download PDF

Info

Publication number: EP0444726A1
Authority: EP; European Patent Office
Prior art keywords: levers; governing; pair; controlling; fact
Prior art date: 1990-02-05
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

EP91200157A

Other languages

German (de)

English (en)

Other versions

EP0444726B1 (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.)

1990-02-05

Filing date

1991-01-26

Publication date

1991-09-04

1991-01-26 Application filed by BREVTEX SA filed Critical BREVTEX SA

1991-09-04 Publication of EP0444726A1 publication Critical patent/EP0444726A1/fr

1996-04-17 Application granted granted Critical

1996-04-17 Publication of EP0444726B1 publication Critical patent/EP0444726B1/fr

2011-01-26 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

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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 positive device for governing and controlling a rotary dobby for actuating the positioning levers for the frames of the heddles of a loom.
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.
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 present invention provides a device for governing and controlling a rotary dobby for the actuation of heddle frames in looms, comprising a control shaft, a disc rotationally locked to said shaft and an eccentric, composed of an eccentric ring keyed onto the shaft, with which it can rotate relative to a traversing external body secured to the actuating bar for the frames , in which there are provided a first and a second pair of levers, firmly pivoted on the rotating eccentric ring and adapted for cooperating radially with one another, one free end of said first and second pairs of levers, respectively, being adapted for engaging with the rotating disc and with the traversing body, the other free end of the levers of the first pair being, furthermore, adapted for receiving any control action of a known, external programmer device, which causes the levers to pivot,disengaging the other end of the lever from the rotating disc, and in one configuration locking the rotary shaft to the eccentric and causing a variation in the position of the traversing body and
levers of said first pair shall have one of the two ends shaped with a tooth orientated substantially radially towards the interior of the eccentric and with a cylindrical set of gear teeth orientated in a substantially tangential direction and adapted for making possible mutual engagement of the two levers with each other, in such a way that the rotation carried out by one of the two levers causes an identical rotation of the other lever in the opposite sense, and by the fact that the rotation of the two levers towards the centre of the control shaft by means of said set of gear teeth firmly locks together the two teeth to constitute one single tooth having twice the width of each of said two teeth.
the programmer shall incorporate actuator means equipped with permanent magnets, which exert a thrust or return action on the free ends of the levers of the first pair, thereby causing the rotation of same in a centrifugal or centripetal direction and that auxiliary return means shall be applied between the levers of each of said pairs of levers for the purpose of promoting the rotation in a radial direction of same, respectively in a centripetal and a centrifugal sense; more especially, the free end of the levers of said first pair has a sliding element pivoted onto it in the axial direction.
Said disc possesses two notches, disposed diametrally opposite each other with respect to the rotational centre of the shaft and adapted for receiving said double tooth; furthermore, said notches and said tooth have flanks and walls respectively shaped according to curved or inclined profiles to favour engagement without play of the tooth in the notch.
said traversing body has an internal ring, equipped with two notches disposed diametrally opposite each other on the internal surface and two notches, or the like, disposed on the external surface and diametrally opposite each other and on an axis perpendicular to the axis of the internal notches, which are adapted for engaging with the teeth of the levers of said second pair, said external notches being, in turn, adapted for engaging with the sliding element integral with the end of the levers of said first pair.
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)
Rotational Drive Of Disk (AREA)
Paper (AREA)

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 true EP0444726A1 (fr)	1991-09-04
EP0444726B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0525862A1 (fr) *	1991-07-25	1993-02-03	NUOVOPIGNONE INDUSTRIE MECCANICHE E FONDERIA S.p.A.	Améliorations à une ratière rotative à grande vitesse
EP0607632A1 (fr) *	1992-12-18	1994-07-27	Lucio Burigana	Ratière rotative

Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0050160A1 (fr) *	1980-10-10	1982-04-28	GebràDer Sulzer Aktiengesellschaft	Dispositif d'accouplement pour la commande des cadres d'un métier à tisser
EP0068139A1 (fr) *	1981-06-26	1983-01-05	Textilma AG	Dispositif d'accouplement, plus particulièrement pour un métier à tisser
EP0078752A1 (fr) *	1981-10-29	1983-05-11	S.A. DES ETABLISSEMENTS STAUBLI (France)	Perfectionnements aux ratières rotatives
EP0185780A1 (fr) *	1984-12-18	1986-07-02	Stäubli AG (Stäubli SA) (Stäubli Ltd.)	Ratière rotative
EP0212273A1 (fr) *	1985-08-08	1987-03-04	Kaiser GmbH & Co. KG	Dispositif pour la commande des ratières d'un métier à tisser
FR2596074A1 (fr) *	1986-03-22	1987-09-25	Schlafhorst & Co W	Dispositif de commande de ratiere pour metier a tisser

1990
- 1990-02-05 IT IT01926290A patent/IT1237968B/it active IP Right Grant
1991
- 1991-01-26 DE DE69118742T patent/DE69118742T2/de not_active Expired - Fee Related
- 1991-01-26 EP EP91200157A patent/EP0444726B1/fr not_active Expired - Lifetime
- 1991-01-26 ES ES91200157T patent/ES2085413T3/es not_active Expired - Lifetime
- 1991-01-26 AT AT91200157T patent/ATE136953T1/de not_active IP Right Cessation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0050160A1 (fr) *	1980-10-10	1982-04-28	GebràDer Sulzer Aktiengesellschaft	Dispositif d'accouplement pour la commande des cadres d'un métier à tisser
EP0068139A1 (fr) *	1981-06-26	1983-01-05	Textilma AG	Dispositif d'accouplement, plus particulièrement pour un métier à tisser
EP0078752A1 (fr) *	1981-10-29	1983-05-11	S.A. DES ETABLISSEMENTS STAUBLI (France)	Perfectionnements aux ratières rotatives
EP0185780A1 (fr) *	1984-12-18	1986-07-02	Stäubli AG (Stäubli SA) (Stäubli Ltd.)	Ratière rotative
EP0212273A1 (fr) *	1985-08-08	1987-03-04	Kaiser GmbH & Co. KG	Dispositif pour la commande des ratières d'un métier à tisser
FR2596074A1 (fr) *	1986-03-22	1987-09-25	Schlafhorst & Co W	Dispositif de commande de ratiere pour metier a tisser

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0525862A1 (fr) *	1991-07-25	1993-02-03	NUOVOPIGNONE INDUSTRIE MECCANICHE E FONDERIA S.p.A.	Améliorations à une ratière rotative à grande vitesse
US5259419A (en) *	1991-07-25	1993-11-09	Nuovopignone Industrie Meccaniche E Fonderia Spa	Keying lever arrangement in a high-speed rotary dobby
EP0607632A1 (fr) *	1992-12-18	1994-07-27	Lucio Burigana	Ratière rotative

Also Published As

Publication number	Publication date
IT1237968B (it)	1993-06-19
IT9019262A0 (it)	1990-02-05
EP0444726B1 (fr)	1996-04-17
DE69118742T2 (de)	1996-11-28
ES2085413T3 (es)	1996-06-01
DE69118742D1 (de)	1996-05-23
IT9019262A1 (it)	1991-08-05
ATE136953T1 (de)	1996-05-15

Legal Events

Date	Code	Title	Description
1991-07-18	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
1991-09-04	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
1992-04-29	17P	Request for examination filed	Effective date: 19920220
1994-03-23	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: BREVTEX SA
1994-11-30	17Q	First examination report despatched	Effective date: 19941018
1996-03-02	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1996-04-17	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
1996-04-17	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
1996-04-17	REF	Corresponds to:	Ref document number: 136953 Country of ref document: AT Date of ref document: 19960515 Kind code of ref document: T
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1996-05-23	REF	Corresponds to:	Ref document number: 69118742 Country of ref document: DE Date of ref document: 19960523
1996-05-24	ET	Fr: translation filed
1996-06-01	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
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1996-10-01	NLV1	Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
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Publication	Publication Date	Title
EP0444726B1 (fr)	1996-04-17	Dispositif positif de commande d'une ratière rotative pour métier à tisser
KR19980064814A (ko)	1998-10-07	로터리 도비와 그러한 도비를 구비한 제직기
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US5479964A (en)	1996-01-02	Rotary dobby having connecting rod automatically disengagable from drive shaft
EP0485009B1 (fr)	1995-08-23	Dispositif de commande d'une ratière rotative pour métier à tisser, comprenant un levier à came et des butées associées
JPH0347338B2 (fr)	1991-07-19
JPH0413458B2 (fr)	1992-03-09
GB2051299A (en)	1981-01-14	Apparatus for coupling and uncoupling of a kinematic mechanism in which a stepwise rotary motion is imparted
US4727910A (en)	1988-03-01	Drive connection for a reciprocating a connecting rod from a drive shaft through an eccentric cam
EP0467444B1 (fr)	1997-06-18	Dispositif d'actionnement pour la programmation des ratières rotatives sur métiers à tisser
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