EP0525490B1 - Nockenschaftmaschine für Webstühle - Google Patents

Nockenschaftmaschine für Webstühle Download PDF

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Publication number
EP0525490B1
EP0525490B1 EP92111876A EP92111876A EP0525490B1 EP 0525490 B1 EP0525490 B1 EP 0525490B1 EP 92111876 A EP92111876 A EP 92111876A EP 92111876 A EP92111876 A EP 92111876A EP 0525490 B1 EP0525490 B1 EP 0525490B1
Authority
EP
European Patent Office
Prior art keywords
cam
cam followers
conjugate
crosspiece
shedding machine
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
EP92111876A
Other languages
English (en)
French (fr)
Other versions
EP0525490A1 (de
Inventor
Lucio Burigana
Giuseppe Serturini
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.)
FIMTEXTILE SpA
Original Assignee
Fimtessile Fabbrica Italiana Macchinario Tessile SpA
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Filing date
Publication date
Application filed by Fimtessile Fabbrica Italiana Macchinario Tessile SpA filed Critical Fimtessile Fabbrica Italiana Macchinario Tessile SpA
Publication of EP0525490A1 publication Critical patent/EP0525490A1/de
Application granted granted Critical
Publication of EP0525490B1 publication Critical patent/EP0525490B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
    • D03C5/005—Leveling mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
    • D03C5/02—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices operated by rotating cams

Definitions

  • the present invention concerns weave machines and, in particular, it relates to a conjugate cam shedding machine for looms, of the type allowing to obtain a positive or desmodromic movement of cam followers - consisting of levers with pairs of rollers conjugating with respective cams - which are apt to move the heald frames through a suitable linkage.
  • the object of the invention is to introduce improvements in a machine of this type allowing, on one hand, to guarantee a more efficient working of the loom and, on the other hand, to improve the quality of the fabric being produced.
  • cams and cam followers are set in a very compact arrangement - normally with a gauge of about 12 mm - equal to that of the heald frames, with the rollers of the cam followers positioned on two parallel planes, symmetrically offset in respect of a third middle plane parallel to the levers of the cam followers.
  • the present invention allows to efficiently and suitably perform the above functions by means of a weave machine of the already mentioned type.
  • the object of the invention is in fact a conjugate cam shedding machine for looms, of the type having narrow-gauge conjugate cams which cause desmodromic oscillating movements of cam followers controlling the heald frames, said cams forming together a movable cam block, apt to from said cam followers so as to allow their free oscillation, and comprising the features of the characterising part of claim 1.
  • the cam block can be parted from the cam followers by rotation, about the oscillation axis of said cam followers, of a pair of eccentrics operating a pair of connecting rods, onto an end of which is fixed the cam block.
  • the parting of the cam block from the cam followers allows the free oscillation of the latter.
  • the rotation of said pair of eccentrics can be obtained by manual operation of a lever or, alternatively, by means of a motor-driven servomechanism.
  • the pre-selectable synchronized mechanism comprises a partly cylindrical and partly comb-shaped crosspiece, the position of which can be varied both axially and angularly, so as to take up specific positions of interaction with the cam followers, according to said plurality of different ways.
  • Said crosspiece preferably comprises a toothed sector engaging with a sprocket of the oscillation shaft of the cam followers, so as to synchronize with the parting movement of the cam block.
  • the axial and angular movements of said crosspiece, to pre-select said specific positions of interaction are controlled by means of a prismatic pin operated by a handle with index, the specific positions of the crosspiece being determined by engagement of pin means thereof into fixed seats.
  • Such a machine allows to pre-select the wanted position - out of said specific positions of interaction of the described crosspiece mechanism - by operating the handle controlling the prismatic pin, and to then part the cam block from the cam followers, thereby realizing the function corresponding to the pre-selected position.
  • the weave machine comprises a cam block 1 (a single cam being shown in fig. 1) fixedly mounted on a drum 2 freely rotating, with the interposition of rolling bearings 3, about a shaft 4.
  • the cam block 1 carries at its ends ring gears 5 engaging with sprockets 6 the rotation of which, controlled by a shaft 7, causes the rotary motion of the cam block 1.
  • the rotation shaft 4 of the cam block 1 is in turn linked, through a U bolt 8, to two connecting rods 9, the small ends 9A of which are freely coupled with two eccentrics 10 which are in turn pivoted into the casing 11.
  • the eccentricity of the shaft 12 - in its central part - in respect of its end pins is meant to guarantee a precise adjustment between the cam followers 13 and the respective cams 1, simply by a suitable rotation of said shaft 12.
  • said mechanism consists of a variably shaped crosspiece 14 comprising at least two significantly different portions: a portion 14A with a uniform cylindrical surface, and an angularly diversified comb-shaped portion 14B, comprising projections alternating with recesses having a gauge equal to that of the cam followers 13.
  • a two-diameter pin 14C of the crosspiece 14 is normally inserted into one of four seats or cavities (16A, 16B, 16C, 16D) provided therefor in the support 16, thereby preventing the rotation of said crosspiece 14 about its eccentric axis.
  • the portion of larger diameter of the pin 14C cooperates with the seats 16A, 16B, 16C, of corresponding diameter.
  • the portion of smaller diameter of the pin 14C cooperates with the seat 16D of corresponding diameter, which is very close to the seat 16C, thereby resulting axially displaced in respect of the three previous positions.
  • the described gear drive guarantees the synchronism of the parting movement of the cam block 1 from the cam followers 13 by rotation of the shaped crosspiece 14.
  • the crosspiece 14 is provided at one end with a slot 22 apt to house the prismatic end 23 of a pin 24 controlled by a handle 25.
  • the crosspiece 14 can thus be axially translated by operating the handle 25, in opposition to springs 26 and 27, hence allowing the outlet of the pin 14C from the seat of the support 16 into which it is engaged, and thus the rotation of said crosspiece always under control of the handle 25.
  • the four seats 16A, 16B, 16C, 16D, of the support 16 each correspond to a different function of the crosspiece 14, and precisely, to the levelling of the healds with closed shed, to the levelling of the healds with low shed, and to the lifting of the even and, respectively, uneven healds for the sorting of the warp yarns. In other words, it is possible to pre-select the position of the crosspiece 14, among the four possible ones, in order to select the function having to be performed.
  • the initial conditions are restored by reversing the rotation of the eccentrics 10.
  • the levelling of the healds with low shed is obtained (fig. 6) by selecting the position of the crosspiece 14 more backward in respect of the projection 15 of the cam followers 13, with the pin 14C engaged into the seat 16B.
  • the angular position of the crosspiece 14 is selected so that its comb-shaped surface 14B may rest on the cam followers 13 and particularly against their projection 15.
  • the pin 14C is inserted into the seat 16C with its portion of major diameter.
  • This operation will allow to obtain the two alternate lap sheds, by lifting in a first phase the uneven heald frames and in a second phase the even heald frames.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Gears, Cams (AREA)

Claims (8)

  1. Paarige Nockenschaftmaschine für Webstühle, von der Art mit schmalen, paarigen Nocken, die desmodromische Hin- und Herbewegungen von Nockenfolgern (13), die die Schäfte steuern, verursachen, wobei die Nocken gemeinsam einen beweglichen Nockenblock (1) bilden, der dazu eingerichtet ist, sich von den Nockenfolgern (13) weg zu bewegen, um so deren freie Hin- und Herbewegung zu erlauben, dadurch gekennzeichnet, daß sie einen Mechanismus (14) aufweist, der mit der Wegbewegung des Nockenblocks (1) synchronisiert ist und eine Mehrzahl von unterschiedlichen vorwählbaren Positionen des Zusammenwirkens mit den Nockenfolgern (13) hat, und dadurch, daß vier bestimmte Positionen des Zusammenwirkens zwischen dem Mechanismus und den Nockenfolgern (13) vorgesehen sind in Übereinstimmung mit denen man die Ausrichtung der Schäfte mit geschlossenen Fach (Fig. 5), flachem Fach (Fig. 6) bzw. zwei vorstehenden Fächern zum Sortieren der Kettfäden (Fig. 7) erhält.
  2. Paarige Nockenschaftmaschine nach Anspruch 1, wobei der Nockenblock (1) von den Nockenfolgern (13) durch Drehung eines Paares von Exzentern (10) um die Bewegungen der Nockenfolgern (13) getrennt werden kann, wobei die Exzenter (10) ein Paar von Verbindungsstangen (9), auf deren Ende der Nockenblock (1) befestigt ist, betätigen.
  3. Paarige Nockenschaftmaschine nach Anspruch 2, wobei die Drehung des Paares von Exzentern (10) durch eine manuelle Betätigung eines Hebels (12A) bewirkt wird.
  4. Paarige Nockenschaftmaschine nach Anspruch 2, wobei die Drehung des Paares von Exzentern (10) mittels eines motorbetriebenen Servomechanismus bewirkt wird.
  5. Paarige Nockenschaftmaschine nach einem der Ansprüche 1 bis 4, wobei der synchronisierte Mechanismus ein teilweise zylindrisches (14A) und teilweise kammförmiges (14B) Kreuzstück (14) hat, dessen Position sowohl axial als auch winklig variiert werden kann, um so eine der vier bestimmten Positionen des Zusammenwirkens mit den Nockenfolgern (13) einzunehmen.
  6. Paarige Nockenschaftmaschine nach Anspruch 5, wobei das Kreuzstück (14) einen gezahnten Abschnitt (18) hat, der mit einem Ritzel (19) des Schwingschafts (12) des Nockenfolgers (13) zusammenwirkt, um so mit der Trennbewegung des Nockenblocks (1) zu synchronisieren.
  7. Paarige Nockenschaftmaschine nach Anspruch 6, wobei die axialen und winkligen Bewegungen des Kreuzstücks (14) zur Vorwahl der bestimmten Positionen des Zusammenwirkens mittels eines prismatischen Stifts (14) gesteuert werden, der durch ein mit einer Skala (29) versehenen Handstück (14) betätigt wird.
  8. Paarige Nockenschaftmaschine nach Anspruch 7, wobei die vier bestimmten Positionen des Kreuzstücks (14) durch Eingriff eines Stiftelements (14C) des Kreuzstücks (14) in vorgegebene Aufnahmen (16A-16D) bestimmt werden.
EP92111876A 1991-07-24 1992-07-13 Nockenschaftmaschine für Webstühle Expired - Lifetime EP0525490B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI912051A IT1251102B (it) 1991-07-24 1991-07-24 Macchina a camme coniugate per la formazione del passo in telai di tessitura.
ITMI912051 1991-07-24

Publications (2)

Publication Number Publication Date
EP0525490A1 EP0525490A1 (de) 1993-02-03
EP0525490B1 true EP0525490B1 (de) 1996-10-09

Family

ID=11360421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92111876A Expired - Lifetime EP0525490B1 (de) 1991-07-24 1992-07-13 Nockenschaftmaschine für Webstühle

Country Status (5)

Country Link
EP (1) EP0525490B1 (de)
JP (1) JPH05209338A (de)
AT (1) ATE144009T1 (de)
DE (1) DE69214376T2 (de)
IT (1) IT1251102B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1861305B (zh) * 2006-06-14 2010-08-25 宜昌长机科技有限责任公司 插齿机让刀转换装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1011281A3 (nl) * 1997-07-14 1999-07-06 Picanol Nv Aandrijfsysteem voor een weefkader van een weefmachine.
CN106087179B (zh) * 2016-08-24 2018-01-30 史陶比尔（杭州）精密机械电子有限公司 传动结构、开口设备和纺织机
CN109440257B (zh) * 2018-10-31 2024-05-03 德清县德盛纺织品有限公司 改良型凸轮开口装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0512944A1 (de) * 1991-05-07 1992-11-11 Sulzer RàœTi Ag Positive Exzentermaschine und Webmaschinen mit einer derartigen Exzentermaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH260546A (fr) * 1940-12-03 1949-03-31 Metapic Holding Dispositif de commande des cadres de lisses d'un métier à tisser.
CH255931A (de) * 1945-12-12 1948-07-31 Sulzer Ag Webmaschine.
CH594082A5 (de) * 1975-07-10 1977-12-30 Albatex Ag
CH627211A5 (en) * 1978-05-11 1981-12-31 Rueti Ag Maschf Treadle device for driving the heald frames of a weaving machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0512944A1 (de) * 1991-05-07 1992-11-11 Sulzer RàœTi Ag Positive Exzentermaschine und Webmaschinen mit einer derartigen Exzentermaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1861305B (zh) * 2006-06-14 2010-08-25 宜昌长机科技有限责任公司 插齿机让刀转换装置

Also Published As

Publication number Publication date
EP0525490A1 (de) 1993-02-03
ATE144009T1 (de) 1996-10-15
JPH05209338A (ja) 1993-08-20
IT1251102B (it) 1995-05-04
DE69214376D1 (de) 1996-11-14
ITMI912051A1 (it) 1993-01-25
ITMI912051A0 (it) 1991-07-24
DE69214376T2 (de) 1998-03-12

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