US3602265A - Dobby machine - Google Patents

Dobby machine Download PDF

Info

Publication number
US3602265A
US3602265A US813810A US3602265DA US3602265A US 3602265 A US3602265 A US 3602265A US 813810 A US813810 A US 813810A US 3602265D A US3602265D A US 3602265DA US 3602265 A US3602265 A US 3602265A
Authority
US
United States
Prior art keywords
hook
holding
holding hook
pattern
retaining
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
US813810A
Other languages
English (en)
Inventor
Joseph Palau
Rudolf Schwarz
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.)
Staeubli AG
Original Assignee
Staeubli AG
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.)
Filing date
Publication date
Priority claimed from CH486368A external-priority patent/CH488829A/de
Application filed by Staeubli AG filed Critical Staeubli AG
Application granted granted Critical
Publication of US3602265A publication Critical patent/US3602265A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D03C1/14—Features common to dobbies of different types
    • D03C1/26—Facilitating engagement of lifting-hooks with draw-knives
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D03C1/06—Double-lift dobbies, i.e. dobbies in which separate draw-knives or equivalent operate on alternate picks
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C2700/00—Shedding mechanisms
    • D03C2700/01—Shedding mechanisms using heald frames
    • D03C2700/0127—Programme-controlled heald frame movement
    • D03C2700/0133—Programme-controlled heald frame movement with mechanical transmission
    • D03C2700/0138—Programme-controlled heald frame movement with mechanical transmission using hooks or lifters
    • D03C2700/0155—Double-lift mechanisms
    • D03C2700/0161—Double-lift mechanisms of negatively-driven type

Definitions

  • a dobby machine has retainin hooks which are [33] Switzerland 8 [31] 4863/68 and 4268/69 guided for rectilinear reciprocal movement and are connected 8 by pivoted links to opposite ends of a rocking member connected by linkage with a heald or dobby shaft.
  • Each of two two-part levers comprises two lever parts which are pivoted [54] DOBBY MACHINE m 10 nnwingmgs. about a common pivot and are movable relative to one another.
  • One lever part has a hook portion and constitutes a [52] US.
  • An object of this invention is the provision of a direct-acting reading system, which may be applied to a known kind of dobby machine mechanism and in which the ends .of a rocker element are alternately struck by cross pieces; retaining hooks are secured in position according to a particular pattern being used and a shift in the reading action takes place in a time interval during'which the loom shed is stationary.
  • the invention provides a dobby machine in which the position of at least one retaining hook, which is connected to an associated shaft or to a heald by way of a mechanical linkage, is adapted to be controlled by a perforated card, by means of a two-part lever whose two constituent parts are mounted on a common pin and are angularly moveable relative to one another; under the action of a spring, each of the lever parts abutting a stop element on the other lever part; and machine being characterized in that a first part of the lever carries a reading needle which, together with the first lever part, is adapted to be periodically lifted by a drive member from the pattern card against the biasing force of a spring, and the first lever part is adapted to be released so that it can move towards the pattern card; and the other part of the lever, is adapted to control the position of the retaining hook either by releasing the hook or, by engaging under or in the hook.
  • H6. 1 is a diagram representing the movements of the driven parts of a dobby machine
  • FIG. 24 each show, diagrammatically, a different position of the dobby machine
  • FIGS. 5 and 6 show details relating to the movement of reading needles, in two respective positions of the needles and on an enlarged scale
  • FIGS. 7-10 are each plan views of a section of a pattern card with reading needles in position.
  • Lower and upper thruster crosspieces 11 and 21 respectively adapted uniformly to swing to and fro about a pin 1, lie against the respective ends 12, 22 of a rocker member 2.
  • Articulated to the center of the rocker member 2 is a pivot lever 3 which is supported from a shaft 4 and is connected, by way of pull rod 5, to a dobby shaft, not shown.
  • Retaining hooks 14, 24 are respectively articulated, by way of connecting bars 13, 23 to the respective ends 12, 22 of the rocker member. Under the effect of impact by the thruster crosspieces ll, 21, the retaining hooks 14, 24 slide in respective guides 15, 25 which ensure that they are accurately guided.
  • a perforated pattern card 6 serves to control the movement and in particular the position of the dobby shaft, this pattern card 6 being driven-by card cylinder 7, with reading needles 30, 40 reading the holes constituting the pattern.
  • Two-part levers 32, 42 are mounted on respective pins 31, 41; the first lever parts 33, 43 carrying the respective reading needles 30, 40, and the second lever parts 34a, 44a being formed as holding hooks 35a, 45a.
  • the second lever parts 34a, 44a are not only rotatably mounted but also slidably mounted, by way of slots 50, 60, on pins 31, 41.
  • Slidable locking members 17, 27, which are actuated by the machine drive (not shown), are capable of executing reciprocating movement.
  • the points or tips of the holding hooks 35a, 45a, which face towards the slidable locking members 17, 27, each comprise a notch 51, 61 whose shape is complementary to that of the wedge-shaped tip of the slidable locking members 17, 27.
  • FIG. 1 relates the points of time at which the movements of the various driven members of the dobby machine occur in relation to the angular movements of the camshaft.
  • A is a curve representing the movement of the lower thruster cross piece 11
  • B is a curve representing the movement of the upper thruster cross piece 21
  • C is a curve representing the movement of the control cylinder 7 of the pattern card 6,
  • D is a curve representing the movement of the earns 38, 48 for lifting the needles from the pattern card
  • E is a curve representing the movement of the lower slidable locking member
  • F is a curve representing the movement of the upper slidable locking member
  • G is a curve representing the movement of the needle guide 62 for the even-numbered picks (weft),
  • H is a curve illustrating the movement of the needle guide 52 for the odd-numbered picks (weft).
  • FIGS. 3 and 4 illustrates the points of time at which the positions illustrated in the FIGS. are assumed.
  • FIGS. 2 and 4 illustrate the lower shed position of the dobby shaft, and
  • FIG. 3 the upper shed position thereof.
  • the upper cross piece 21 In the position illustrated in FIG. 2 the upper cross piece 21 is shown moving to the rear after it has struck against the retaining hook 24.
  • the needle 40 lies against the pattern card 6, as no hole is present for reading at that point.
  • the holding hook 45a is raised and is secured in position by the slidable locking member 27, so that the retaining hook 24 follows the crosspiece 21 to the right, this movement being initiated by the tensioning force of the pull rod 5.
  • the lower retaining hook 14 is also in the inward position and the holding hook 35a is held in position by the slidable locking member 17.
  • the dobby shaft is in the lower shed position.
  • the upper retaining hook 24 is-as determined by the configuration of the pattern card-held in its outwardly thrust position by the holding hook 45a, in which the tip of the slidable locking member 27 firmly engages in the notch.
  • the reading or sensing needle 40 of lever 42 has penetrated a hole in the pattern card 6, and the holding hook 45a is secured in position by slidable locking member 27.
  • This position of the upper hooks 24, 45a remains unaltered until the next but one reading action performed by the needles.
  • the lower thruster cross piece 11 is about to assume its most forwardly advanced position, that is to say the lower retaining hook 14 is also in its outwardly thrust position.
  • the dobby shaft is about to assume the upper shed position. Movement of lower holding hook 350 is still prevented owing to the presence of slidable locking member 17 which engages the notch 51 in its tip. At the next instant of time the slidable locking member 17 will be withdrawn so that the holding hook 35a will be freed for the following control action, as determined by the pattern on the pattern card.
  • the cams 38, 48 then come into operation, that is to say both first parts 33, 43 of the two-part levers 32, 42 are pivoted, by rotation of the cams, into the position shown in FIG. 4, so that the reading needles 30, 40 are lifted from the pattern card.
  • FIG. 4 shows the dobby mechanism at another instant of the working cycle and reads a difierent pattern on the pattern card from that which was read in the case of FIGS. 2 and 3.
  • the lower holding hook 35a does not interlockingly engage with retaining book 14. It is however secured by the slidable locking member 17 in-the nonengaging position.
  • the upper crosspiece 21 has struck against the upper retaining hook and the slidable locking member retracted, so that the two hooks 45a, 24 are ready to enter into locking engagement as soon as the reading needle 40 lies in front of a hole in the pattern card 6.
  • the reading needles 30 and 40 are lifted, as the cams 38, 48 have pivoted their carrier levers 33, 43 about the pins 31 and 41 respectively.
  • the pattern card can be moved forward by the cylinder 7 to the extent of one further pick.
  • the needles 30, 40 are caused, by the needle guides 52, 62, to execute a further movement which will be described below.
  • the pivotal movements, initiated by the cams 38, 48, of the parts 33, 43 may take place independently of the position of the holder hooks 35a, 45a and irrespective of the fact that these hooks 35a, 45a are retained in position by the slidable locking members 17, 27, because the levers 32, 42 are constructed as double levers which can execute pivotal movements relative to one another. If part 33 in FIG. 4 is relieved by the further rotation of cam 38, then lever 32 will remain in its original position, as it is maintained in position by the slidable locking member 17. In the course of further rotation of cam 48, however, spring 49 pivots lever 42 against the biasing force of spring 470, so that the reading needle 40 lies against the pattern card 6. If a hole is present in the pattern card 6, then lever 42 assumes the position shown in FIG. 3; if no hole is present in the pattern card in front of the needle, then the lever 42 assumes the position shown in FIG. 2.
  • the tip of the slidable locking member 27 engages, in the course of its forward movement, into the notch 61 and at the same time shifting part 44a to the left, so that the reading clearance between the two hooks 45a and 24 is eliminated.
  • the mounting of part 44a in the elongate hole 60 enables this movement to take place against the tensioning effect of spring 470.
  • the thruster cross piece 21 only commences its rearward pivotal motion when the holding hook 45a is held in position by the slidable locking member 27.
  • the mechanism illustrated enables elimination of the known reading play between the contact surfaces of the holding hooks and the retaining hooks, this play being necessary for correct functioning; consequently, the dobby shaft can operate substantially without jolts or shocks.
  • TI-Ie elongate hole in part 440 is made sufficiently long to ensure that it serves as a securing means when the machine is not operated in the correct sequence, for example when the pattern card is being changed or when the machine is incorrectly handled. If
  • the retaining hook 24 should in this way be unexpectedly thrust forward by its thruster cross pieces 21-the corresponding holding hook 440 being held in the position of interlocking engagement (FIG. 3)-then this would lead 3)-damage being inflicted on the machine.
  • the head of the retaining hook 24 presses against the holding hook 45a and shifts it further to the left-this being permitted by the elongate hole 60-until it is pulled round the tip of the slidable locking member 27 by the spring 47 a.
  • the reading needles 30, 40 are connected to the double levers 32, 42 in an articulated manner and are guided in guides 52, 62 (FIGS. 5 and 6).
  • the needle 40 reads the even-numbered pick and the needle 30 the oddnumbered pick.
  • One and the same pick, for example an even pick in this instance, is thus successively read twice by the needle 40, despite the fact that the cylinder has moved on.
  • the movement of the guides is so controlled that the pattern card is read by the needles in accordance with the following table and in the manner illustrated in FIGS. 7-10.
  • FIGS. 7-10 the reading points (holes) of the pattern card are numbered as 1-11.
  • the second pick is read for the forward motion V, and the first pick is read for the rearward motion R.
  • the third pick is read for the forward motion V, and the second pick is read for the rearward motion R.
  • the fourth pick is read for the forward motion V, and the third pick is read for the rearward motion rearward motion R.
  • the fifth pick is read for the forward motion U, and the fourth pick is read for the rearward motion R.
  • cams 38, 48 it is possible to use, in a known manner, a reciprocating bar.
  • the lifting of the needles 30, 40 and of the slidable locking members 17, 27 may be controlled from a single camshaft.
  • a compression spring 39, 49 for each two-part lever it is possible to use a single spring between the parts 33 and 34.
  • a dobby machine having a dobby shaft and means for feeding a perforated pattern
  • a two-part actuating lever comprising first and second lever parts pivotal about a common pivot and movable relative to one another, said second lever part having hook means and constituting a holding hook selectively engageable with and disengageable from said retaining hook
  • said fist lever part having sensing means for sensing a pattern fed by said feed means and means engageable with said second lever part to move said holding hook in position to engage said retaining hook and means engageable with said second lever part to lock said holding hook stationary in engagement with said retaining hook.
  • a combination according to claim Lin which said second lever part is pivoted at one end and has said holding hook at the opposite-end, and in which said locking means comprises a movable locking member engageable with said second lever disengage said second lever part from said locking member.
  • a dobby machine having a frame, a dobby shaft and means for feeding a pattern
  • a reciprocable retaining hook linkage means connecting said retaining hook with said dobby shaft
  • a holding hook pivotally movable about a pivot on said frame between an engaged position in which said holding hook is in engagement with said retaining hook and'a disengaged position in which said holding hook is out of engagement with said retaining hook
  • means for reading a pattern fed by said feeding means means connecting said pattern reading means with said holding hook to move said holding hook between said disengaged position and said engaged position in accordance with said pattern, and means for locking said holding hook in engaged position, said holding hook being movable longitudinally relative to its .pivot to disengage said holding hook from said locking means.
  • a dobby machine having a frame, a dobby shaft, a rocker member connected with said dobby shaft and means for feeding a pattern
  • a reciprocable retaining hook means on said frame for guiding said retaining hook in a rectilinear path of reciprocation, linkage means connecting said retaining hook with said rocker member, a holding hook pivotally mounted on said frame for pivotal movement between an engaged position in which said holding hook is in engagement with said retaining hook and a disengaged position in which said holding hook is out of engagement with said retaining hook
  • means for reading a pattern fed by said feeding means means connecting said pattern reading means with said holding hook to move said holding hook between said disengaged position and said engaged position in accordance with said pattern and means for releasably locking said holding hook stationary relative to said frame in said engaged position.
  • said I means connecting said pattern reading means with said holding hook comprises avlever pivoted on said frame coaxially with said holding hook and having abutment means engageable with said holding hook to move it between said disengaged and engaged positions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Conveying Record Carriers (AREA)
  • Lock And Its Accessories (AREA)
US813810A 1968-04-02 1969-04-01 Dobby machine Expired - Lifetime US3602265A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH486368A CH488829A (de) 1968-04-02 1968-04-02 Schaftmaschine
CH426869A CH501073A (de) 1968-04-02 1969-03-21 Schaftmaschine

Publications (1)

Publication Number Publication Date
US3602265A true US3602265A (en) 1971-08-31

Family

ID=25695094

Family Applications (1)

Application Number Title Priority Date Filing Date
US813810A Expired - Lifetime US3602265A (en) 1968-04-02 1969-04-01 Dobby machine

Country Status (6)

Country Link
US (1) US3602265A (cs)
BE (1) BE730858A (cs)
CH (1) CH501073A (cs)
DE (1) DE1915796A1 (cs)
FR (1) FR2005367A1 (cs)
GB (1) GB1269083A (cs)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4120327A (en) * 1976-05-28 1978-10-17 Staeubli Ltd. Double-lift dobby
US4182380A (en) * 1977-05-27 1980-01-08 Societe Anonyme Des Etablissments Staubli Dobbies for weaving looms

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH509437A (de) * 1969-06-25 1971-06-30 Staeubli Ag Verfahren zur Steuerung der Zughaken einer Schaftmaschine und Steuermechanismus zur Durchführung des Verfahrens
CH509436A (de) * 1969-06-25 1971-06-30 Staeubli Ag Doppelhubschaftmaschine
CH536888A (de) * 1971-03-10 1973-05-15 Staeubli Ag Abtasteinrichtung einer Schaftmaschine
FR2543172B1 (fr) * 1983-03-22 1985-10-25 Staubli Sa Ets Perfectionnements aux ratieres a balances pour metiers a tisser

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976891A (en) * 1957-08-22 1961-03-28 Staubli Geb & Co Dobbies
US3285291A (en) * 1965-10-01 1966-11-15 Staubli Geb & Co Drive-mechanism in double lift dobbies
US3307591A (en) * 1964-05-15 1967-03-07 Staubli Geb & Co Double-lift dobbies
US3381719A (en) * 1965-06-01 1968-05-07 Staubli Geb & Co Double lift dobbies
US3441060A (en) * 1966-10-07 1969-04-29 Staubli Geb & Co Double lift dobbies
CH473919A (de) * 1967-04-27 1969-06-15 Staeubli Geb & Co Verfahren und Anordnung zur Schaftmaschinensteuerung
US3459236A (en) * 1967-01-30 1969-08-05 Staublic & Co Geb Dobby machines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976891A (en) * 1957-08-22 1961-03-28 Staubli Geb & Co Dobbies
US3307591A (en) * 1964-05-15 1967-03-07 Staubli Geb & Co Double-lift dobbies
US3381719A (en) * 1965-06-01 1968-05-07 Staubli Geb & Co Double lift dobbies
US3285291A (en) * 1965-10-01 1966-11-15 Staubli Geb & Co Drive-mechanism in double lift dobbies
US3441060A (en) * 1966-10-07 1969-04-29 Staubli Geb & Co Double lift dobbies
US3459236A (en) * 1967-01-30 1969-08-05 Staublic & Co Geb Dobby machines
CH473919A (de) * 1967-04-27 1969-06-15 Staeubli Geb & Co Verfahren und Anordnung zur Schaftmaschinensteuerung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4120327A (en) * 1976-05-28 1978-10-17 Staeubli Ltd. Double-lift dobby
US4182380A (en) * 1977-05-27 1980-01-08 Societe Anonyme Des Etablissments Staubli Dobbies for weaving looms

Also Published As

Publication number Publication date
FR2005367A1 (cs) 1969-12-12
BE730858A (cs) 1969-10-01
CH501073A (de) 1970-12-31
DE1915796A1 (de) 1969-10-09
GB1269083A (en) 1972-03-29

Similar Documents

Publication Publication Date Title
US3602265A (en) Dobby machine
US2085459A (en) Pattern mechanism for looms and the like
US4182380A (en) Dobbies for weaving looms
CS262415B2 (en) Device for folded edge forming on terry fabric
US3724510A (en) A dobby
US2069330A (en) Dobby for weaving
CH654350A5 (it) Presentatrice di trama per telai di tessitura ad alimentazione continua della trama.
US2751938A (en) Dougle lift shedding motion
US3554238A (en) Dobbies
US3875974A (en) Device for controlling gripper shuttles in looms
US3171445A (en) Feeler needle mechanism for exploring pattern cards of looms
US4172475A (en) Weaving machine simultaneously controlled by a Jacquard machine and a dobby
US4315530A (en) Control for a dobby mechanism
US2815044A (en) Double lift dobby
US3680601A (en) Improvements in or relating to draw hooks of a dobby
CS208187B2 (en) Method of transmitting the healds and transmitting device of the healds for executing the same
US3481370A (en) Selective weft depositors for shuttleless looms
US2438796A (en) Positively operating dobby
US3411549A (en) Weft yarn tying device for needle looms
US3731712A (en) Weft distributor and selector for power looms
US3117599A (en) Jacquard machines
US3848643A (en) Reading mechanism of a dobby
US3807459A (en) Axminster gripper
US3376900A (en) Looms operating with multi-color stationary weft supplies
US5031671A (en) Weft yarn changer for a loom