US3703195A - Heddle frame lift device - Google Patents

Heddle frame lift device Download PDF

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Publication number
US3703195A
US3703195A US63090A US3703195DA US3703195A US 3703195 A US3703195 A US 3703195A US 63090 A US63090 A US 63090A US 3703195D A US3703195D A US 3703195DA US 3703195 A US3703195 A US 3703195A
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United States
Prior art keywords
baulk
draw
heddle frame
hook members
knives
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
US63090A
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English (en)
Inventor
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
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Staeubli AG
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Publication date
Application filed by Staeubli AG filed Critical Staeubli AG
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    • 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

Definitions

  • High-speed heddle frame lift device also known as a shed forming apparatus, in which the control times for Foreign Appllcatloll y Data the draw members amount up to two rotations of the Aug. 13, 1969 Switzerland ..l2283/69 f .heddle frame hedd'e frame unit IS composed of several known shed forming devices which are arranged parallel and one behind [22] (SI. the omen while one heddle frame lift device releases [.1- n c frame the second heddle frame Fleldof Search l device is being controllcd for the next [56] References Cited 3 Claims, 8 Drawing Figures FOREIGN PATENTS OR APPLICATIONS 8/1903 Switzerland ..l39/74 PATENTEDNI V m 3. 703; 195
  • RUDOLF scmmz HEDDLE FRAME LIFT DEVICE Known card-controlled shed forming apparatus, such as a high-speed dobby, Jacquard machine or similar, particularly those which are built according to the Hattersley principle, have the characteristic that the draw members, like for example draw hooks, must be controlled for connection or nonconnection to the draw knife within the shed standstill time during which the draw knife is in its normal position.
  • the duration of the shed standstill is on the average of rotation of the crankshaft of the weaving machine.
  • Such shed forming machines often have a longer shed dwell for the reversal than would be required by the loom for the weft registration so that for this reason either the full capacity of the loom cannot be utilized or control errors could occur in the shed forming machine at a reduced reversing time.
  • the purpose of the invention is to provide a shed forming machine which has all advantages of the known shed forming devices, particularly those of the Hattersley system, and can work according to the openshed double lift principle, according to the negative or positive principle, and with which high speeds of 1,000 t/min. and more can be achieved, whereby a shed dwell is no longer needed for the reversal including the setting up and cancelling of the reading-off or engagemcnt clearance of the draw members. Also the pick logic working in the forward and backward drive is maintained in the high speed zones.
  • a shed forming machine in which two or more heddle frame lift devices, also known as shed forming devices,- of a known type are united to form a heddle frame lift unit, also known as a shaft lift unit, and same are so arranged that the draw or push elements thereof which effect the heddle frame, also known as the shaft movement each acts onto one shaft in such a manner that the control members control the lift members, for each weft registration at a nonworking shed forming device.
  • the draw or push elements thereof which effect the heddle frame also known as the shaft movement
  • the apparatus comprises a shed forming machine of the Hattersley system with a baulk at the center of which is connected a jack lever connected to the heald shaft and further baulks are connected to the baulk ends of said baulk, which further baulks carry each at their ends draw hooks which are to be controlled in a patterned manner, and a reading mechanism for a patternlike control of said draw members, and draw knives for operating the draw members, all of which is characterized in that the shed forming machine has at least three, preferably four, conventional draw knives and each shaft lift unit of this machine cooperates with all draw knives.
  • the method for the operation of such a shed forming machine with one secondary baulk for each main baulk end and at least four independently controlled lift members is characterized according to the invention in that one lift member per weft registration is controlled in a patterned manner and that the sequence of the control of the lift members remains constantly the same, while one and the same lift member is withdrawn or not withdrawn, respectively, at each fourth weft for operating the shaft.
  • a shed forming machine is already known in which two shed forming devices which are positioned parallel to one another and act onto the same shaft are united to form a shaft lift unit. With such apparatus, three and more shaft positions are possible.
  • This shed forming machine is used particularly in the velvet and plush weaving mills.
  • the objective of the present invention is to obtain with the new shed forming machine a substantial increase of the operating speed at normal shaft movements.
  • the tendency in construction looms has been to drive them at constantly higher speeds and the present shed forming machine provides for an above average rate of operation.
  • FIG. 1 illustrates the basic structure of a shed forming machine of a known construction attached to a loom
  • FIG. 2 illustrates a detail of a shed forming machine with a known preneedle system as a reading and control mechanism for the patterned control of the draw hooks
  • FIG. 3 illustrates a known simple drive which can be used for controlling the movement of a plurality of draw knives
  • FIG. 4 illustrates the working diagram of the draw knives of a shed forming machine of the Hattersley system, as is for example illustrated in FIG. 1,
  • FIG. 5 illustrates the working diagram of the draw knives ofa shed forming machine of the invention
  • FIGS. 6-8 schematically illustrate three positions of the draw knives, draw hooks and baulks of the shed forming machine of the invention, which positions correspond to the points of time identified with VI, VII, and VIII in the diagram of FIG. 5.
  • the two draw knives 3 are moved back and forth through the cross lever 2 by the drive 1.
  • a draw hook 4 is associated with each draw knife 3, which draw hook each is pivotably connected to the end of the baulk 5.
  • the jack lever 7 engages the center of the baulk 5 and is supported on the axis 6 and to act through the draw members 8 onto the up and down movable shaft or heddle frame 9 of the weaving machine.
  • the illustrated machine operates according to the principle of the spring release of the shaft by means of springs 10.
  • the draw hooks 4 are controlled I M007 m 4 by the pattern card 13 provided with cams pegs through the feeler lever 11 and the support needles 12.
  • FIG. 2 illustrates a modification having a reading-in mechanism for the known patterned control of the draw hooks 4 as is disclosed more in detail in Swiss Pat. No. 355 097.
  • 5 is the baulk
  • 3 are the draw knives
  • 13 the pattern card showing the pattern holes which are read by the reading needles 14.
  • the normal position of the draw hooks 4 is obtained by means of the support needles 12 which receive the reading of the reading needles 14 from the push elements 15.
  • the draw knife can be reciprocated by means of a conventional cam-and-lever mechanism.
  • the present invention contemplates utilizing a plurality of draw knives for each heddle frame, such as the draw knife A, B, C, and D diagrammatically illustrated in FIG. 3, and the pattern of movement of these draw knives will be explained in detail hereinafter.
  • a conventional mechanism which includes a rotatable shaft 16 having a plurality of cam lobes 17 thereon which are appropriately angularly spaced from one another around the periphery of said shaft for causing reciprocating movement of the plurality of draw knives in the desired phase relationship.
  • FIG. 4 illustrates the diagram of movement of the draw knives 3 of the shed forming machine according to FIG. 1.
  • the distance Z means for the loom the time of a weft registration (or insertion of a pick if it is only one thread) and corresponds to a crankshaft rotation.
  • H and T respectively, identify the upper and lower shed positions, respectively, of the draw knives.
  • h is the lift for the weft registration effectively available to the weaver.
  • the two draw knives 3 are pulled out interchangeably.
  • the counterknife is in the rear dead-center position.
  • the control of the draw hooks must occur during this time. The faster the working speed, the shorter is the control time so that errors are readily possible. A further increase of the working speed is therefore limited.
  • FIGS. 6-8 illustrate the arrangement of the draw hooks according to the invention and the part cooperating therewith.
  • the jack lever 7 is again hinged to the center of the known main or primary baulk 5, which lever is supported on the axis 6.
  • the draw member for the heald shaft (not illustrated) is identified with 8.
  • the known draw hook is now replaced by the two draw levers 31, a secondary baulk 32 each being hinged centrally to said draw levers 31.
  • These secondary baulks each carry a draw hook 34 at their ends.
  • Each of the four draw hooks is associated with a draw knife 33.
  • the arrangement is completed by the stationary bars 20.
  • Both the draw hooks 34 and the draw knives 33 can now be controlled or operated each individually with the same means as used in known shed forming machines.
  • the movement of the four draw knives relative to one another can be read.
  • the diagram is divided by entering on top the curves of movement of the two upper knives and on the bottom the curves of movement of the two lower knives.
  • the draw knives and the associated curves are identified with A, B, C and D.
  • the distance Z corresponds to one weft or to one crankshaft rotation.
  • the upper line H in the diagram corresponds to the pulled-out position of the draw knife, namely when the draw hook is connected, the heald shaft is in the upper shed position.
  • the lower line T in the diagram corresponds to the normal position, namely the not pulled-out position of the draw knife whereby the heald shaft is in the lower shed position.
  • the diagram is one of a shed formingmachine which drives a heald shaft according to the open-shed doublelift method and is arranged so at such an extreme limit of operation that it no longer has any shed standstill.
  • FIGS. 6, 7, and 8 schematically illustrate the position of the draw knives at the times identified with VI, VII, and VIII in the diagram of FIG. 5.
  • FIG. 6 corresponding to VI of FIG. 5, the two upper knives A and B are in the crossing position of their reciprocal movement.
  • the two lower knives C and D are in the normal position and have a full engagement clearance E.
  • the two lower draw hooks are free for the control. Since none of the two upper draw hooks 34 was connected to the draw knife, the shaft remains in the lower shed.
  • FIG. 7 corresponding to VII of FIG. 5, the draw knife B is in the pulled-out position.
  • the draw knife C has cancelled the engagement clearance, the associated draw hook is controlled upwardly and the draw knife A is just then forming its engagement clearance.
  • the draw knife D remained unchanged since the position according to FIG. 6, namely it is in its rearmost normal position, thus forming the engagement clearance E.
  • the drive of the draw knives 33 and the control of the draw hooks 34 do not differ from the embodiment of FIGS. 2 and 3.
  • the formation of the engagement clearance E is done according to the example of a known shed forming machine.
  • the shed forming machine can be equipped with one single sensing or reading mechanism for the pattern card.
  • the draw knives can be driven by cam plates (FIG. 3) or intermittently rotating cranks (FIG. 1).
  • the reading-off clearance can be produced from a recess in the cam or from an additional cam plate.
  • This described apparatus for the movement of shafts can also be used for the release of the heddles of a Jacquard machine.
  • the most important advantages of the described shed forming machine can be summarized in that ample time is available for the production and cancellation of the reading-off clearance and the control of the draw hooks. A shed dwell is also no longer needed for the hook control, and the weft-logic work is assured by using the suitable reading mechanism.
  • the working speeds can be increased to 1,000 weft/min. and more.
  • the arrangement of the invention can be used both in negative shed forming machines and in positive shed forming machines.
  • the invention was explained in connection with a shed forming machine with shed forming devices of the Hattersley system. However, the same effect of the invention can be obtained with any other known shed forming device by installing connecting elements between the shaft and the weft forming devices of which a multiple, preferably two or four are arranged through which these devices act in a selected sequence onto one and the same shaft, while the devices which do not work therebetween can be used for the control function.
  • a heddle frame lift device for a weaving machine having a heddle frame, a pivotally mounted on opposite sides of said second pivot means and extending outwardly away therefrom, second secondary baulk means including third pivot means for securing said second secondary baulk means to said primary baulk means on the other side of said first pivot means, and a pair of second book members pivotally secured to said second secondary baulk means on opposite sides of said third pivot means and extending outwardly away therefrom, the improvement comprising:
  • a heddle frame lift device according to claim 1, wherein said first and second draw knives each move in opposite directions;
  • a heddle frame lift device including pattern card means for controlling which one of said hook members becomes engaged with the respective one of said draw knives;
  • said pattern card means controls said one of said hook member during a reciprocating motion of another one of said draw knives and said hook members.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US63090A 1969-08-13 1970-08-12 Heddle frame lift device Expired - Lifetime US3703195A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1228369A CH501074A (de) 1969-08-13 1969-08-13 Schaftmaschine und Verfahren zu deren Betrieb

Publications (1)

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US3703195A true US3703195A (en) 1972-11-21

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ID=4381561

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Application Number Title Priority Date Filing Date
US63090A Expired - Lifetime US3703195A (en) 1969-08-13 1970-08-12 Heddle frame lift device

Country Status (9)

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US (1) US3703195A (de)
JP (1) JPS5142671B1 (de)
AT (1) AT298360B (de)
CH (1) CH501074A (de)
CS (1) CS172333B2 (de)
DE (1) DE1944491C3 (de)
FR (1) FR2058061A5 (de)
GB (1) GB1327072A (de)
SU (1) SU393838A3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833027A (en) * 1972-01-04 1974-09-03 Elitex Zavody Textilniho Double lift dobby
US4458727A (en) * 1981-03-02 1984-07-10 Staeubli Ltd. Dobby with lifting linkage for weaving machines
US6135161A (en) * 1999-05-17 2000-10-24 Toray Industries, Inc. Method of making a fabric and a fabric obtained therefrom

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH334403A (fr) * 1954-06-28 1958-11-30 Mond Nickel Co Ltd Procédé de préparation de poudre de fer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH334403A (fr) * 1954-06-28 1958-11-30 Mond Nickel Co Ltd Procédé de préparation de poudre de fer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
German Publication Serial No. 1,106,704 to Osswald of 2 1965. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833027A (en) * 1972-01-04 1974-09-03 Elitex Zavody Textilniho Double lift dobby
US4458727A (en) * 1981-03-02 1984-07-10 Staeubli Ltd. Dobby with lifting linkage for weaving machines
US6135161A (en) * 1999-05-17 2000-10-24 Toray Industries, Inc. Method of making a fabric and a fabric obtained therefrom

Also Published As

Publication number Publication date
FR2058061A5 (de) 1971-05-21
DE1944491A1 (de) 1971-02-25
CS172333B2 (de) 1976-12-29
AT298360B (de) 1972-05-10
DE1944491B2 (de) 1974-02-28
GB1327072A (en) 1973-08-15
CH501074A (de) 1970-12-31
DE1944491C3 (de) 1979-10-04
JPS5142671B1 (de) 1976-11-17
SU393838A3 (de) 1973-08-10

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