US3724510A - A dobby - Google Patents

A dobby Download PDF

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Publication number
US3724510A
US3724510A US00146958A US3724510DA US3724510A US 3724510 A US3724510 A US 3724510A US 00146958 A US00146958 A US 00146958A US 3724510D A US3724510D A US 3724510DA US 3724510 A US3724510 A US 3724510A
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United States
Prior art keywords
control arm
needle
control
dobby
drive shaft
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
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US00146958A
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English (en)
Inventor
W Kleiner
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Staeubli AG
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Staeubli AG
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Publication date
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Publication of US3724510A publication Critical patent/US3724510A/en
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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 invention relates to a dobby which for each heddle frame has a coupling consisting of an eccentric ring with a slideable wedge, which ring is arranged on the driving shaft, and a connecting rod encircling the ring, wherein the wedge is controlled by an arm which is provided with a member, such as a needle, for reading the pattern card in such a manner that the wedge engages either a recess of the driving shaft or engages the connecting rod.
  • the invention also includes dobby apparatus for performing the method.
  • a dobby operates with picks following each other in what is termed a correct sequence if the weaving machine controlled by the dobby can be changed at any time from a forward to a backward motion without a mistake appearing in the woven pattern. This is particularly important if a mistake occurs during insertion of a pick and the pickmistake must beovercome.
  • each shaft it is known for each shaft to arrange four reading needles which are axially movable in place or two axially and side wardly movable reading needles which read even and uneven and also old and new picks from a pattern card.
  • the pattern information read from the reading needles is transferred to auxiliary members, stored therein and at the right time moved to the part to be coupled to the heddle frame mechanism.
  • Each intermediate member which is connected into the control of the coupling and which serves as information storage, pick sorting member or power amplifier, processes one after the other the information transmitted from the pattern card to the reading needle but it does so only with a time shift which is caused by reaction times, operating clearances and safety apparatus. Such time shifts are also time losses during the operating and results in the entire time for the reversal of the coupling members becoming more complicated and the time of movement for the heddle frames being limited. Thus, the rotational speed of the dobby is reduced. It is also known that each intermediate member connected into the control mechanism is a cause for possible errors and in' addition affects the size and cast of the machine.
  • the dobby is characterized in such a manner that for each heddle frame one single reading needle is arranged which reads successively information for the position of the heddle frame for the even, uneven, old and new pick insertion on the pattern card and transmits same directly to the coupling unit which in turn operates the heddle frame.
  • the reading needle is moved, alone or with a part of the transmitting member connected to it, on the pattern card longitudinally thereof and/or transversely thereto for one or several this method of operation which is a condition for a logically operating dobby.
  • this logic control can be carried out, for example, in such a manner that, aside from the transverse movement the reading member reads the pattern card twice during a pick insertion and the pattern card is moved on in pilgrim step by the card cylinder, namely first a forward indexing for the two picks then a backward indexing for one pick.
  • the indexing steps can follow one another referenced from the shed intersection of the heddle frames, as follows:
  • the reading member is lifted, moved laterally and again lowered, while at the same time the pattern card is turned back for one pick to again-read and anticipatorily control the heddle frame position for the preceding pick insertion;simultaneously with the pick insertion and between the renewed lifting and lowering of the reading member, the pattern card is indexed forwardly for two picks after which at the next shed intersection the abovementioned steps are again taken but this time the lateral displacement of the reading member relative to the pattern card occurs in the opposite direction, etc.
  • a dobby is used which is characterized in that the reading members, like reading needles, are guided, in combs which are constructed for a back and forth movement in the axial direction of the card cylinder.
  • the method of the invention is discussed more in detail in connection with the exemplary embodiment of a dobby for the control of a heddle frame, which embodirnent is schematically illustrated in the drawings, in
  • FIGS. 1 to 5 are front views of ashed mechanism in five different positions
  • FIG. 6 is an enlarged cross-sectional view; along the line Vl-VI of FIG. 3; n FIGS. 7 and 8 are top views of the shed forming mechanism with two different needle; 7 g
  • FIG. 9 illustrates the motion diagram of the dobby at a simple, nonlogic control
  • FIG. 10 illustrates the motion diagram of the dobby at a logic control
  • i i FIGS. 11 to 14 illustrate four different positionsof the pattern card relative to the reading needle of the shed forming mechanism. 7 I
  • the pattern card 62 provided with the openings 3, 3' is moved together with thecard cylinder 61L
  • the neeposiitions of the reading openings 3, 3 is provided at one'end of the control arm 10.
  • the control arm has on its other end an annular ring 14 through which the driving shaft 15 extends.
  • eccentric ring 28 is positioned on, and for rotation with respect to, the driving shaft and the connecting rod 18 is positioned on said eccentric ring 28.
  • the connecting rod pivots the motion member 20 for the heddle frame 44 (which is only schematically indicated in the draw ing) about the pivot point 48.
  • the wedge 13 is supported radially slidingly on the'eccentric ring 28, which wedge in its two extreme positions engages either the recess 29, 29' of the driving shaft 15 or the zone 30, 30' which is formed by the ends of the semicircularguide rails 16.
  • the ring is offset and has a collar 34 which extends axially beyond the plane of the control arm and which slides in a groove 27 of the wedge controls to the position of the wedge on the eccentric ring 28.
  • the two springs 49 and 50 engage the control arm 10 which springs are mounted on the frame of the dobby at 55.
  • the spring 49 which acts in the direction of the slot 56 is weaker than the spring 50 between the slot 56 and the reading needle 4.
  • the fixed stop is identified with 57 on which stop the control arm 10 can slide with its slot 56. The lifting of the control arm 10 and thereby the needle 4 is accomplished by the lifting rod 60.
  • FIGS. 11 to 14 Since the openings 3, 3' in the pattern card 62 are arranged in two longitudinally extending rows, FIGS. 11 to 14, for each following pick reading the arm 4 guided in the comb 68 is bent slightly sidewardly and the needle 10 starting from the comb is moved back and forth for one-half heddle frame division.
  • the diagram illustrates the picks 2', 1 and 2.
  • FIGS. 11 to 14 each illustrate a top view of the same perforated pattern card, whereby each opening 3, 3' has the number of the pick which it controls.
  • the figures show the position of the pattern card 62 relative to the fixed position axis 67 (FIG. 13) of the needle 4 transversely to the direction of movement of the pattern card.
  • the time of the insertion of the pick 2' is chosen during which time the next pick 1 is read.
  • the situation corresponds to the position of the shed forming mechanism according to FIG. 1.
  • the heddle frame 44 is in the lower shed position 44, namely the wider side of the eccentric ring 28 is positioned below the driving shaft 15.
  • the lifting rod 60 has lifted the needle 4 out of the pattern card 62 and is just now lowered so that the needle partly engages the opening 3 for reading the pick No. l.
  • the card cylinder 61 has indexed the pattern card 62 for two picks in, forward direction V to the next position.
  • the needle is positioned, as illustrated in FIG. 7, above the left row of openings with the uneven picks 1, 3, 5, etc.
  • the control members of the shed forming mechanism must again read the preceding pick.
  • the needle 4 is lifted out from the pattern card 62 by the lifting rod 60, the card cylinder 61 indexes the pattern card in the backward direction R for one pick, and the needle is moved throughthe comb 68 for one half interval parallel to the cylinder axis into the position according to FIG. 8. There then occurs the reading of the preceding pick 2 by the needle 4, as illustrated in FIG. 12.
  • FIG. 14 illustrates the reading situation for the backward motion.
  • the situation corresponds to the position in FIG. 11 in that the position of the heddle frame was read for the preceding, that is the already performed, first pick insertion. This reading is effected as a precautionary measure for a possible backward motion.
  • FIG. 9 illustrates a motion diagram in which the positions according to FIGS. 1 and 4 are entered.
  • the card cylinder does not index the pattern card in vocational step, namely two picks forward and one pick backward, but forwardly pick for pick.
  • One does not have a logical operation of the dobby so that in the event pick thread repairs are necessary certain controls must be released by hand.
  • FIGS. 9 and 10 The important differences between the methods of operation illustrated in the two diagrams FIGS. 9 and 10 consist in that according to FIG. 9 the cylinder indexes the pattern card pick by pick into the center of the shed standstill and simultaneously the lateral movement of the needle takes place, while according to FIG. 9
  • the reading needle 4 performs a movement transversely to the direction of movement of the pattern card 62.
  • the entire pattern card indexing cylinder 61 in addition to its indexing movement, performs a movement in its axial direction, namely transversely to the direction of movement of the pattern card 62, while the reading needle moves only up and down.
  • the reading needle can be moved in longitudinal direction of the pattern card in such a manner that it performs the same steps.
  • Adobby comprising:
  • a connecting rod having means defining a first opening therein and adapted to rotatably receive said eccentric ring therein;
  • a wedge member radially slidably mounted on said A: eccentric ring and adapted to releasably couple means on the opposite end thereof and adapted to engage a pattern card'having at least two rows of selectively positioned holes therein, said control arm being adapted to permitsaid needle means to become aligned with selected ones of said rows; and
  • control arm has a flexible characteristic and said flexible characteristic permits a lateral shiftability of said needle means to effect said alignment with said selected ones of said rows in response to said control means.
  • control means comprises a laterally shiftable. comb member engaging said control arm adjacent the end thereof containing said needle means, said comb member effecting a flexing of said control arm to align said needle means with said selected ones of said rows.
  • a dobby according to claim 4, wherein said means movably supporting said control arm comprises a pivotal support for pivotally supporting said control arm for movement about a pivot axis.
  • a lifting bar adapted to engage and pivot said control arm about said pivot axis to effect a cooperation of said needle means with a pattern of holes in said pattern card.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Credit Cards Or The Like (AREA)
US00146958A 1970-05-29 1971-05-26 A dobby Expired - Lifetime US3724510A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH803770A CH523984A (de) 1970-05-29 1970-05-29 Verfahren zum Steuern einer Schaftmaschine und Schaftmaschine zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
US3724510A true US3724510A (en) 1973-04-03

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ID=4334169

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Application Number Title Priority Date Filing Date
US00146958A Expired - Lifetime US3724510A (en) 1970-05-29 1971-05-26 A dobby

Country Status (8)

Country Link
US (1) US3724510A (es)
JP (1) JPS512994B1 (es)
CH (1) CH523984A (es)
CS (1) CS158300B2 (es)
DE (1) DE2036647C3 (es)
ES (1) ES391615A1 (es)
FR (1) FR2093749A5 (es)
GB (1) GB1356592A (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804128A (en) * 1972-11-14 1974-04-16 L Amigues Dobby for looms
US4298031A (en) * 1978-08-14 1981-11-03 Albatex Ag Shed forming device for looms
US4493346A (en) * 1981-01-09 1985-01-15 Textilma Ag Coupling arrangement usable in a textile machine
US5259419A (en) * 1991-07-25 1993-11-09 Nuovopignone Industrie Meccaniche E Fonderia Spa Keying lever arrangement in a high-speed rotary dobby
US5335564A (en) * 1992-02-25 1994-08-09 Nuovopignone - Industrie Meccaniche E Fonderia S.P.A. Cam for revolving dobby
US20060231152A1 (en) * 2005-04-15 2006-10-19 Staubli Faverges Cam motion machine, method of assembly of such a machine and weaving loom in which such a machine is installed

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2841278C2 (de) * 1978-09-22 1983-11-10 Maschinenfabrik Carl Zangs Ag, 4150 Krefeld Steuerung für eine Rotations-Schaftmaschine
DE2909131A1 (de) * 1979-03-08 1980-09-11 Johann Kaiser Gmbh & Co Kg Mas Schaftmaschine fuer webmaschinen
EP0047791B1 (de) * 1980-09-12 1984-12-19 GebràœDer Sulzer Aktiengesellschaft Kupplungsanordnung zum Steuern der Schäfte einer Webmaschine
JPS5765321A (en) * 1980-10-06 1982-04-20 Rikagaku Kenkyusho Multi-connected portionwisely pouring apparatus and method for controlling same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1256644A (en) * 1917-01-20 1918-02-19 Peter Barlow Dobby used in looms for weaving.
US2926703A (en) * 1960-03-01 Controlling device
US3171445A (en) * 1962-09-12 1965-03-02 Rueti Ag Maschf Feeler needle mechanism for exploring pattern cards of looms
US3407848A (en) * 1966-02-24 1968-10-29 Mecaniques Verdol Soc D Device for rotating the pattern cylinder of double-lift dobbies independently of itsnormal drive
US3468347A (en) * 1966-10-05 1969-09-23 Mecaniques Verdol Soc Heddle frame actuating gearing for looms
US3554238A (en) * 1967-04-25 1971-01-12 Staeubli Ag Dobbies

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1286422A (fr) * 1961-04-17 1962-03-02 Sulzer Ag Procédé de lisage de la bande de commande d'une ratière à cartons
AT232933B (de) * 1962-09-14 1964-04-10 Rueti Ag Maschf Tastnadelapparat zum mustergemäßen Bewegen der Webschäfte

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926703A (en) * 1960-03-01 Controlling device
US1256644A (en) * 1917-01-20 1918-02-19 Peter Barlow Dobby used in looms for weaving.
US3171445A (en) * 1962-09-12 1965-03-02 Rueti Ag Maschf Feeler needle mechanism for exploring pattern cards of looms
US3407848A (en) * 1966-02-24 1968-10-29 Mecaniques Verdol Soc D Device for rotating the pattern cylinder of double-lift dobbies independently of itsnormal drive
US3468347A (en) * 1966-10-05 1969-09-23 Mecaniques Verdol Soc Heddle frame actuating gearing for looms
US3554238A (en) * 1967-04-25 1971-01-12 Staeubli Ag Dobbies

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804128A (en) * 1972-11-14 1974-04-16 L Amigues Dobby for looms
US4298031A (en) * 1978-08-14 1981-11-03 Albatex Ag Shed forming device for looms
US4493346A (en) * 1981-01-09 1985-01-15 Textilma Ag Coupling arrangement usable in a textile machine
US5259419A (en) * 1991-07-25 1993-11-09 Nuovopignone Industrie Meccaniche E Fonderia Spa Keying lever arrangement in a high-speed rotary dobby
US5335564A (en) * 1992-02-25 1994-08-09 Nuovopignone - Industrie Meccaniche E Fonderia S.P.A. Cam for revolving dobby
US20060231152A1 (en) * 2005-04-15 2006-10-19 Staubli Faverges Cam motion machine, method of assembly of such a machine and weaving loom in which such a machine is installed
US7448415B2 (en) * 2005-04-15 2008-11-11 Staubli Faverges Cam motion machine, method of assembly of such a machine and weaving loom in which such a machine is installed

Also Published As

Publication number Publication date
DE2036647B2 (de) 1973-05-30
GB1356592A (en) 1974-06-12
FR2093749A5 (es) 1972-01-28
ES391615A1 (es) 1974-08-01
JPS512994B1 (es) 1976-01-30
DE2036647A1 (de) 1971-12-09
CH523984A (de) 1972-06-15
DE2036647C3 (de) 1974-01-03
CS158300B2 (es) 1974-10-15

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