EP0444726B1 - Vorrichtung zum zwangsläufigen Steuern einer Rotationsschaftmaschine für Webmaschinen - Google Patents

Vorrichtung zum zwangsläufigen Steuern einer Rotationsschaftmaschine für Webmaschinen Download PDF

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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
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EP
European Patent Office
Prior art keywords
levers
governing
pair
controlling
fact
Prior art date
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Expired - Lifetime
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EP91200157A
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English (en)
French (fr)
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EP0444726A1 (de
Inventor
Giovanni Beretta
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BREVTEX SA
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BREVTEX SA
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Publication date
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    • 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.

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

Claims (7)

  1. Vorrichtung zum Regeln und Steuern einer Rotationsschaftmaschine für das Betätigen von Kettfädenrahmen einer Webmaschine mit einer Steuerwelle (1), einer Scheibe (2), die drehend mit der Welle verbunden ist und einem Exzenter, der aus einem Exzenterring (4) besteht, der auf der Welle (1) befestigt ist, mit der er sich relativ zu einem querliegenden äußeren Körper (4a) drehen kann, der an der Betätigungsstange für die Rahmen befestigt ist, wobei die Vorrichtung ein erstes (9, 10) und ein zweites (13, 14) Paar von Hebeln aufweist, die fest angelenkt sind an dem rotierenden Exzenterring (4) und so ausgestaltet sind, daß sie radial miteinander zusammenarbeiten, wobei ein freies Ende des ersten beziehungsweise zweiten Paares von Hebeln so ausgestaltet ist, daß es die rotierende Scheibe (2) und den Querkörper (4a) eingreift, wobei das andere freie Ende (9d, 10d) der Hebel des ersten Paares darüberhinaus so ausgestaltet ist, daß es eine beliebige Steuerbetätigung von einer externen Programmiervorrichtung (13) aufnimmt, gekennzeichnet durch die Tatsache, daß die Hebel (9, 10) des ersten Paares an einem ihrer beiden Enden mit einem Zahn (9b, 10b), der im wesentlichen radial gegen das Zentrum des Exzenters (4) ausgerichtet ist, und mit einem Satz zylindrischer Getriebezähne (9c, 10c) versehen sind, die im wesentlichen tangential ausgerichtet und so ausgebildet sind, daß sie einen hin- und hergehenden Eingriff der zwei Hebel miteinander derart ermöglichen, daß die Rotation, die von einem der beiden Hebel ausgeführt wird, eine identische Rotation des anderen Hebels im entgegengesetzten Sinn bewirkt, und durch die Tatsache, daß die Rotation der beiden Hebel (9, 10) hin zum Zentrum der Steuerwelle (1) durch den Satz der Getriebezähne, die beiden Zähne (9b, 10b) fest zusammenbringt, um einen einzigen Zahn (17) zu bilden, der eine Breite hat, die dem Doppelten der Breite jedes der beiden Zähne entspricht.
  2. Vorrichtung zum Regeln und Steuern einer Rotationsschaftmaschine nach Anspruch 1, gekennzeichnet durch die Tatsache, daß der Programmierer eine Betätigungsvorrichtung einbaut, die mit Permanentmagneten ausgerüstet ist, die eine Schiebebewegung oder eine Rückstellbewegung auf die freien Enden der Hebel des ersten Paares ausüben und eine Rotation dieser Hebel in einem zentrifugalen oder zentripetalen Sinn erreichen.
  3. Vorrichtung zum Regeln und Steuern einer Rotationsschaftmaschine nach den vorhergehenden Ansprüchen, gekennzeichnet durch die Tatsache, daß eine Hilfsrückführvorrichtung (11, 15) zwischen den Hebeln jedes Hebelpaares angebracht ist, um die Rotation des ersten beziehungsweise zweiten Hebelpaares in radialer Richtung in einem zentripetalen und einem zentrifugalen Sinn zu unterstützen.
  4. Vorrichtung zum Regeln und Steuern einer Rotationsschaftmaschine nach Anspruch 1, gekennzeichnet durch die Tatsache, daß das andere freie Ende der Hebel (9, 10) des ersten Paares ein Schiebeelement aufweist, das in axialer Richtung beweglich auf ihm angelenkt ist.
  5. Vorrichtung zum Regeln und Steuern einer Rotationsschaftmaschine nach Anspruch 1, gekennzeichnet durch die Tatsache, daß die Scheibe (2) zwei Kerben (2a, 2b) hat, die einander diametral bezüglich des Zentrums der Rotation der Welle (1) gegenüber stehen und ausgebildet sind, um den doppelten Zahn (17) aufzunehmen.
  6. Vorrichtung zum Regeln und Steuern einer Rotationsschaftmaschine nach Anspruch 1, gekennzeichnet durch die Tatsache, daß die Kerben (2a, 2b) und der Zahn (17) Flanken beziehungsweise Wände besitzen, die gebogene oder geneigte Profile besitzen, um den Eingriff zu unterstützen, ohne daß ein Spiel des Zahns in der Kerbe auftritt.
  7. Vorrichtung zum Regeln und Steuern einer Rotationsschaftmaschine nach Anspruch 1, gekennzeichnet durch die Tatsache, daß der Querkörper (4a) einen inneren Ring (7) aufweist, mit zwei Kerben (7a), die einander diametral auf der inneren Oberfläche angeordnet sind, und zwei Kerben (7b) oder dergleichen, die auf seiner äußeren Oberfläche diametral einander gegenüberstehend und auf einer Achse rechtwinklig zur Achse der inneren Kerben (7a) angeordnet sind, welche so ausgebildet sind, daß sie mit den Zähnen (13b, 14b) der Hebel des zweiten Paares in Eingriff treten, wobei die äußeren Kerben wiederum so ausgeformt sind, daß sie das Schiebeelement (9d, 10d), das am Ende der Hebel (9, 10) des ersten Paares befestigt ist, eingreifen.
EP91200157A 1990-02-05 1991-01-26 Vorrichtung zum zwangsläufigen Steuern einer Rotationsschaftmaschine für Webmaschinen Expired - Lifetime EP0444726B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

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Application Number Title Priority Date Filing Date
EP91200157A Expired - Lifetime EP0444726B1 (de) 1990-02-05 1991-01-26 Vorrichtung zum zwangsläufigen Steuern einer Rotationsschaftmaschine für Webmaschinen

Country Status (5)

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

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 (de) * 1980-10-10 1982-04-28 GebràœDer Sulzer Aktiengesellschaft Kupplungsanordnung zum Steuern der Schäfte einer Webmaschine
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
EP0185780B1 (de) * 1984-12-18 1989-03-01 Stäubli AG (Stäubli SA) (Stäubli Ltd.) Rotations-Schaftmaschine
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
DE69118742D1 (de) 1996-05-23
ES2085413T3 (es) 1996-06-01
EP0444726A1 (de) 1991-09-04
IT9019262A0 (it) 1990-02-05
ATE136953T1 (de) 1996-05-15
DE69118742T2 (de) 1996-11-28
IT1237968B (it) 1993-06-19
IT9019262A1 (it) 1991-08-05

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