EP1587975B1 - Vorrichtung zum programmieren von rotationsschaftmaschinen für webmaschinen - Google Patents

Vorrichtung zum programmieren von rotationsschaftmaschinen für webmaschinen Download PDF

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Publication number
EP1587975B1
EP1587975B1 EP03767542A EP03767542A EP1587975B1 EP 1587975 B1 EP1587975 B1 EP 1587975B1 EP 03767542 A EP03767542 A EP 03767542A EP 03767542 A EP03767542 A EP 03767542A EP 1587975 B1 EP1587975 B1 EP 1587975B1
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EP
European Patent Office
Prior art keywords
lever
profiles
selection
selection lever
operating lever
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
EP03767542A
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English (en)
French (fr)
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EP1587975A1 (de
Inventor
Gian Luigi Cremonesi
Italo Serturini
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FIRST SpA
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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 present invention relates to a selection device to carry out the programming of rotary dobbies to operate the heald frames in weaving machines.
  • the heald frames In order for the shed entrance, formed by the warp threads, to open and close alternately, allowing to insert the weft yarn, the heald frames must consequently assume a high and a low position, carrying with them in this movement the corresponding warp threads.
  • a weaving machine In order to transform the rotary movement of the main shaft in an alternate translation movement of the frames, a weaving machine is used and, in particular, "dobbies" in which suitable eccentric rings operate the movement of their respective frames by means of leverages.
  • the present invention relates to improvements to this device.
  • the dobby programming devices already known in the art for a very long time have more recently been improved through various and important technical features, intended to remove or reduce their many drawbacks, among which the need to stop the shaft at each half-turn in order to have the time to clear the previous selection and to set a new one for the following half-turn, and the high probability of errors in the carrying out of the selection in a "punctual" manner at the centreline of the movement diagram.
  • the devices of the two above mentioned patents used an operating lever in which one and both the projecting end profiles, respectively, were manufactured as pivoted teeth housed in a recess with two diverging abutting walls, with one of which they were kept in contact by a spring.
  • the invention relates to a device to carry out the programming of rotary dobbies for the actuation of the heald frames in weaving machines, of the type in which the control rods of the heald frames are operated by connecting rods mounted each onto an eccentric ring rotating with respect to the main shaft of the dobby, which further comprises a disc caused to rotate by said shaft and a selection lever pivoted on said eccentric ring and capable of making it integral with the connecting rod, when it engages the diametrically opposite pins thereof and, respectively, with said disc, when it engages with one of its end teeth diametrically opposite recesses thereof through the action of a spring, said device comprising an operating lever rotating about a fixed fulcrum upon the action of thrust means and in contrast with return-spring means, so that projecting end profiles of the same operating lever alternately arrange themselves along or outside the trajectory of the end opposite to the toothed end of the selection lever to cause it to engage or to prevent it from engaging with the rotating disc, the rotation of the operating lever occurring during the rotation of the main shaft
  • said teeth have an upright wall onto which said spring means rest, and a wall with a slanting portion to receive the impact from said shaped end of the selection lever.
  • the spring means that act onto said teeth of the projecting profiles of the operating lever perform an action which is weaker than that performed by the spring acting on the selection lever.
  • pins of the connecting rod with which the selection lever is capable of engaging are provided symmetrically opposite on the diameter perpendicular to the longitudinal axis of the connecting rod itself.
  • the device according to the invention is part of a dobby comprising a rotating shaft 1 onto which a connecting rod element 2 is keyed on, shaped so as to have a projection 2A pivotally hinged at 3A onto the operating rod 3 of the corresponding heald frame QL and a substantially circular ring 2B which carries two pins 2C at opposite positions of its diameter perpendicular to the longitudinal axis of the connecting rod element 2.
  • a rocker lever 7 (or start lever, or selection lever) having a shaped end 8, a slot 9 of which receives a pivot 10 projecting from the eccentric ring 5, and a fork-shaped end 11, 12, of which one branch 11 carries a tooth 13 and the other branch 12 is provided with a recess for the engagement of the pins 2C.
  • the disc 15 lies in the same position as the lever 7, so that the tooth 13 thereof is able to engage with one of the two grooves 15A or 15B and disengage therefrom.
  • the dobby is completed by a C-shaped operating lever 16, the ends of which, according to the invention, are equipped with respective mobile, tooth-shaped projecting profiles 17 and 18, oscillating between the abutting walls 17A, 17B, and 18A, 18B respectively and maintained in position against the first thereof by springs 19 and 20.
  • the action performed by the springs 19 and 20 is weaker than that performed by the spring 14 onto lever 7, so that the phase displacement of teeth 17, 18 occurs before the opening movement of the lever 7.
  • the operating lever 16 oscillates - upon the action of the thrust means 21 - about a fulcrum 22, between a first position, determined by the traction of a spring 23 and of a reference element 24, and a second position, determined by the thrust performed by the means 21 under the control of an actuator of the programming.
  • the operation of the dobby occurs according to the most up-to-date known art, with the start lever or selection lever 7 making the eccentric ring 5 integral with the disc 15 when the tooth 13 thereof engages one of the recesses 15A or 15B or instead leaving the eccentric ring 5 idle with respect to the disc 15, when the tooth 13, due to the engagement of the toothed profiles 17 or 18 with the shaped end 8 of the lever 7, is totally removed from said recesses.
  • the start lever or selection lever 7 makes the eccentric ring 5 integral with the disc 15 when the tooth 13 thereof engages one of the recesses 15A or 15B or instead leaving the eccentric ring 5 idle with respect to the disc 15, when the tooth 13, due to the engagement of the toothed profiles 17 or 18 with the shaped end 8 of the lever 7, is totally removed from said recesses.
  • the start lever or selection lever 7 makes the eccentric ring 5 integral with the disc 15 when the tooth 13 thereof engages one of the recesses 15A or 15B or instead leaving the eccentric ring 5 idle with respect to the disc 15, when the tooth 13,
  • the engagement of the projecting end profiles of the operating lever 16 with the shaped end 8 opposite to the toothed end of the selection lever 7 which engagement always occurs as an impact at high speed, is dampened due to the fact that such profiles are both manufactured as an oscillating tooth against the action of spring means.
  • the ends of the C-shaped operating lever 16 are equipped with tooth-shaped, mobile projecting profiles 17 and 18 which oscillate between abutting walls 17A, 17B, and 18A and 18B maintained in position against the first of them by the springs 19 and 20.
  • the teeth 17 and 18 comprise portions of slanted wall 17C and 18C to receive the impact and the engagement of the shaped end 8 of the lever 7 when, rotating in the direction of the arrow F, such end finds tooth 17 and tooth 18 on its trajectory.
  • the impact occurring when lever 7 touches the teeth 17, 18 is dampened by the springs 19 and 20, which offer a certain resistance to the short oscillation allowed to teeth 17 and 18, which are therefore slowed down to a certain extent until they touch the walls 17B and 18B. Since this effect is achieved every time the engagement occurs of at least one of the ends of the operating lever 16 with the shaped end of the selection lever 7, i.e.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (4)

  1. Vorrichtung zum Programmieren von Rotationsschaftmaschinen fiir den Betrieb der Litzenrahmen von Webmaschinen, von der Art, bei der die Betätigungsstangen (3) der Litzenrahmen (QL) durch Verbindungsstangen (2), die jeweils an einem exzentrischen Ring (5), der bezüglich der Hauptwelle (1) der Schaftmaschine rotiert, montiert sind, und weiter mit einer Scheibe (15), die von der Hauptwelle (1) zur Rotation veranlasst wird, und einem Wahlhebel (7), der an dem exzentrischen Ring (5) angelenkt ist und mit der Verbindungsstange (2) einstückig gemacht werden kann, wenn er mit dessen diametral gegenüber liegenden Stiften (2C) in Eingriff ist, beziehungsweise mit der Scheibe (15), wenn er aufgrund der Wirkung einer Feder (14) mit einem seiner Zähne (13) mit deren einander diametral gegenüber liegende Kerben (15A, 15B) in Eingriff ist, wobei die Vorrichtung einen Betätigungshebel (16) aufweist, der aufgrund der Wirkung eines Druckmittels und gegen eine Rückstellfeder (23) um einen festen Drehpunkt (22) rotiert, so dass vorragende Endprofile (17, 18) dieses Betätigungshebels (16) sich selbst alternierend entlang oder außerhalb der Bahn des dem gezahnten Ende (13) des Wahlhebels gegenüberliegenden Endes anordnen, um diesen zu veranlassen, mit der Drehscheibe (15) in Eingriff zu kommen bzw. daran zu hindern, mit der Drehscheibe (15) in Eingriff zu kommen, wobei die Rotation des Betätigungshebels (16) während der Rotation der Hauptwelle stattfindet, dadurch gekennzeichnet, dass die vorragenden Endprofile des Betätigungshebels (16) jeweils als ein Zahn hergestellt sind, der an dem entsprechenden Ende des Hebels (16) in einer Kerbe mit zwei divergierenden Anlageflächen (17A, 17B, 17A, 18B) angelenkt ist und durch Federmittel (19, 20) derart mit einer der Flächen (17A, 18A) in Berührung gehalten wird, dass er verschwenkend mit der anderen Fläche (17B, 18B) in Berührung kommen kann, wobei die Federmittel den Stoß gegen die Profile selbst der dem gezahnten Ende des Wahlhebels (7) gegenüber liegenden geformten Enden jedes Mal, wenn - während des gewöhnlichen Vorwärtslaufs der Webmaschine mit gleich bleibender Geschwindigkeit - die Profile sich selbst entlang der Bahn des Endes (8) des Wahlhebels (7) anordnen, dämpfen.
  2. Vorrichtung nach Anspruch 1, bei der jeder Zahn auf aufrechte Wand, auf der das Federmittel (19, 20) ruht, und eine Wand mit einem geneigten Abschnitt (17C, 18C) zur Aufnahme des Stoßes des geformten Endes (8) des Wahlhebels (7).
  3. Vorrichtung nach einem der Ansprüche 1) oder 2), bei der die auf die Zähne (17, 18) der vor ragenden Profile des Betätigungsmittels wirkenden Federmittel (19, 20) eine Wirkung ausüben, die schwächer ist als die Wirkung, die von dem Federmittel, das auf den Wahlhebel (7) wirkt, ausgeübt wird.
  4. Vorrichtung nach einem der Ansprüche 1) bis 3), bei der die Stifte (2C) der Verbindungsstange (2), mit denen der Wahlhebel (7) in Eingriff gelangen kann, symmetrisch auf dem senkrechten Durchmesser zu der Längsachse der Verbindungsstange (2) selbst vorgesehen sind.
EP03767542A 2002-12-19 2003-11-14 Vorrichtung zum programmieren von rotationsschaftmaschinen für webmaschinen Expired - Lifetime EP1587975B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMI20022695 ITMI20022695A1 (it) 2002-12-19 2002-12-19 Dispositivo per attuare la programmazione di ratiere rotative in macchine di tessitura
ITMI20022695 2002-12-19
PCT/EP2003/012719 WO2004057075A1 (en) 2002-12-19 2003-11-14 Device to carry out the programming of rotary dobbies in weaving machines

Publications (2)

Publication Number Publication Date
EP1587975A1 EP1587975A1 (de) 2005-10-26
EP1587975B1 true EP1587975B1 (de) 2006-12-27

Family

ID=32676844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03767542A Expired - Lifetime EP1587975B1 (de) 2002-12-19 2003-11-14 Vorrichtung zum programmieren von rotationsschaftmaschinen für webmaschinen

Country Status (6)

Country Link
EP (1) EP1587975B1 (de)
CN (1) CN1729326B (de)
AU (1) AU2003292017A1 (de)
DE (1) DE60310769T2 (de)
IT (1) ITMI20022695A1 (de)
WO (1) WO2004057075A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2899602B1 (fr) * 2006-04-11 2008-05-23 Staubli Faverges Sca Ratiere rotative, metier a tisser comprenant une telle ratiere et procede de commande d'une telle ratiere
FR2957366B1 (fr) * 2010-03-12 2012-04-13 Staubli Sa Ets Ratiere rotative et metier a tisser equipe d'une telle ratiere
CN103268098B (zh) * 2013-04-28 2015-07-15 浙江理工大学 一种多臂机的控制与检测系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0413385A1 (de) * 1989-08-17 1991-02-20 Solvay Verfahren zur Herstellung einer Natronlauge
IT1247261B (it) * 1991-02-28 1994-12-12 Nuovo Pignone Spa Dispositivo perfezionato per la movimentazione delle leve ad anello dicomando delle chiavette di una rattera rotativa ad altissima velocita'
IT1252301B (it) * 1991-11-15 1995-06-08 Nuovo Pignone Spa Sistema di controllo automatico per ratiera rotativa elettronica
IT1254219B (it) * 1992-02-25 1995-09-14 Eccentrico perfezionato per ratiera rotativa
IT1276827B1 (it) * 1995-10-06 1997-11-03 Fimtextile Spa Dispositivo per attuare la programmazione di ratiere rotative in macchine di tessitura
FR2757882B1 (fr) * 1996-12-31 1999-02-19 Staubli Sa Ets Ratiere rotative et metier a tisser equipe d'une telle ratiere
DE69819405T2 (de) * 1997-06-03 2004-09-02 Fimtextile S.P.A., Torre Boldone Vorrichtung zum Programmieren von Rotationsschaftmaschinen in Webstühlen
ITMI20010670A1 (it) * 2001-03-29 2002-09-29 Fimtextile Spa Dispositivo per attuare la programmazione di ratiere rotative per macchine di tessitura comportante mezzi di comando a motore elettrico line

Also Published As

Publication number Publication date
AU2003292017A1 (en) 2004-07-14
ITMI20022695A1 (it) 2004-06-20
WO2004057075A1 (en) 2004-07-08
CN1729326A (zh) 2006-02-01
DE60310769D1 (de) 2007-02-08
DE60310769T2 (de) 2007-10-11
EP1587975A1 (de) 2005-10-26
CN1729326B (zh) 2010-09-22

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