EP0404717A1 - Métier à tisser avec bobine de trame mobile - Google Patents

Métier à tisser avec bobine de trame mobile Download PDF

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Publication number
EP0404717A1
EP0404717A1 EP90810373A EP90810373A EP0404717A1 EP 0404717 A1 EP0404717 A1 EP 0404717A1 EP 90810373 A EP90810373 A EP 90810373A EP 90810373 A EP90810373 A EP 90810373A EP 0404717 A1 EP0404717 A1 EP 0404717A1
Authority
EP
European Patent Office
Prior art keywords
weft
bobbin
thread
path curve
eyelet
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.)
Withdrawn
Application number
EP90810373A
Other languages
German (de)
English (en)
Inventor
John Dalton Griffith
Alois Steiner
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.)
Sulzer AG
Original Assignee
Sulzer AG
Gebrueder Sulzer 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
Application filed by Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0404717A1 publication Critical patent/EP0404717A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
    • B65H49/02—Methods or apparatus in which packages do not rotate
    • B65H49/04—Package-supporting devices
    • B65H49/10—Package-supporting devices for one operative package and one or more reserve packages
    • B65H49/12—Package-supporting devices for one operative package and one or more reserve packages the reserve packages being mounted to permit manual or automatic transfer to operating position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a loom with weft insertion of yarn bobbins, which are mounted in a frame in front of the weft insertion member of the weaving machine, the distance between a weft yarn bobbin and a thread eyelet being variable.
  • the distance between the weft bobbin and the thread eyelet can be achieved by telescoping the holders of the bobbin or eyelet. This makes it possible to set the optimal distance between the bobbin and the eyelet for each winding condition of a weft bobbin.
  • the setting can also be changed while the weaving machine is operating, while the diameter of the weft bobbin is decreasing. This ensures that the weft yarn is pulled off the weft yarn bobbin with as little tension and interference as possible.
  • the aim is to automatically replace the weft bobbins, it being advantageous for the changing process if the empty bobbin to be replaced moves out of the weaving area is, whereby it can then be gripped more easily by a manipulator.
  • the weft yarn spool is seated on a displaceable holder which is driven by a transport device and which can be moved along a path curve, a thread eyelet for the weft thread arranged after the spool in the thread running direction being located on the inside of the path curve in such a way that the distance of the path points from the center of the eyelet in the direction of transport of the coil along the path curve is steadily decreasing, and that in each case, at a certain angle to the path curve tangents, straight lines which are drawn from the path curve tangent point to the inside of the path curve intersect at least approximately at one point , which coincides with the center of the thread eyelet.
  • the trajectory can be part of a logarithmic spiral which fulfills the condition of a single point of intersection for the straight lines mentioned.
  • the weft spool 1 according to FIG. 1 with the winding height H is at a distance R1 from the thread eyelet 2 at the beginning of the processing of the thread supply.
  • the thread eyelet 2 is surrounded by a plate 20 with a thread sensor 21.
  • the diameter of the weft bobbin gradually decreasing, the weft bobbin 1 is moved by the transport device 3 along the path curve 4.
  • the distance of the weft bobbin gradually decreases from the value R1 to the value R2 according to FIG. 1.
  • the transport device 3 is stopped until the intended weft yarn supply of the weft bobbin 1 'is fully interwoven.
  • weft thread is drawn off from the new weft bobbin 1, and the transport device 3 is put into operation again.
  • a thread monitor arranged in the old bobbin can also be used to generate a signal when the diameter of the old bobbin falls below a certain value. Thread can then be inserted into the weaving machine from the new bobbin by means of a pulling device.
  • a reserve spool 1 ⁇ is located on the inlet side to the sprocket 35, while a used bobbin tube 11 on a plug-on mandrel 12 on the outlet side of the sprocket 35 is waiting to be replaced.
  • the path curve 4 is determined by guide rails 31, between which a chain 34 slides.
  • the chain runs apart from the area of the guide rails 31 and a chain tensioner 37 and the sprockets 35, 35 'and is designed so that it can carry the weft yarn bobbins 1,1', 1 ⁇ and the bobbin tube 11.
  • the chain 34 which is shown schematically in FIG. 1 by a dash-dotted line, follows its course between the guide rails 31, the dash-dotted line forming the trajectory 4.
  • Path curve tangents 41 and 42 are drawn in at two points on path curve 4.
  • the chain 34 In order for the weft spool 1 to follow the changes in direction of the path curve 4 as it travels along the path curve 4, the chain 34 must be constructed in such a way that the individual links are tangent to the path curve 4, and the holder for the weft thread spool must be fixed to one or the other be connected to several chain links.
  • the following relationship can be assumed for trajectory 4: R ⁇ e cot ⁇ x ⁇ , where ⁇ is the angle from the origin of the logarithmic spiral and R is the distance between the center of the thread eyelet 2 and the trajectory 4 for the respective angle ⁇ .
  • FIG. 2 shows a side view of an embodiment of a weft bobbin 1 with part of the chain 34 and the guide rails 31.
  • the chain links 34a, each arranged twice, and 34b are held together by rollers 30, which are assembled from the same roller parts 30a, 30b.
  • the rollers 30 run along the path curve 4 between four guide rails 31, which are fastened to holders 32, which in turn are screwed onto a base plate 33.
  • the screw connection of the holder 32 can be displaced within elongated holes 33a in the base plate 33, so that the guide rails can be adjusted overall.
  • the guide rails can also be designed in a divided manner, two holders 32 each carrying a section of guide rails 31.
  • a holder 15 is fastened, in which an arm 13 is inserted, which rotatably with a Flange 14 is connected.
  • a screw 14 'in an arcuate elongated hole in the flange 14 allows adjustment of the arm 13 which carries the arbor 12, the bobbin tube 11 and the weft bobbin 1, so that the weft bobbin 1 can be precisely aligned with the thread eyelet 2.
  • the chain 34 is driven by the sprocket 35, which is seated on a drive shaft 36.
  • An electric motor that is occasionally switched on is suitable as the drive, or a stepping motor, for example, that receives a control impulse from a control in the weaving machine depending on the weft yarn length entered corresponding to the number of weaving cycles since the new yarn spool was used.
  • the running speed of the chain can be variable, for example in such a way that at the beginning of the processing of a new weft spool 1, the average speed of the chain along the path curve 4 is lower than against the last phase of running through the path curve 4, because then the diameter of the thread spool at constant take-off speed of the weft yarn 11 decreases faster and faster with time.
  • This regularity can be calculated easily and can be saved, for example, in a microprocessor control for the drive.
  • the weaving machine is switched from one article to another and another weft yarn is processed, it can be advantageous to set the path curve 4 differently, as mentioned, and the distance to the thread eyelet 2 can also change.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP90810373A 1989-06-20 1990-05-22 Métier à tisser avec bobine de trame mobile Withdrawn EP0404717A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2287/89 1989-06-20
CH228789 1989-06-20

Publications (1)

Publication Number Publication Date
EP0404717A1 true EP0404717A1 (fr) 1990-12-27

Family

ID=4230247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810373A Withdrawn EP0404717A1 (fr) 1989-06-20 1990-05-22 Métier à tisser avec bobine de trame mobile

Country Status (2)

Country Link
EP (1) EP0404717A1 (fr)
JP (1) JPH0327151A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514322A1 (fr) * 1991-05-15 1992-11-19 Sulzer RàœTi Ag Dispositif pour alimenter un métier à tisser en bobines de réserve de fil de trame et procédé pour actionner le dispositif

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1152739A (fr) * 1955-05-10 1958-02-24 Procédé et dispositif pour maintenir la tension du fil à une valeur uniforme, notamment dans les bobinoirs
EP0225670A1 (fr) * 1985-12-09 1987-06-16 Picanol N.V. Procédé et dispositif pour dérouler un fil d'une bobine dans les métiers à tisser
EP0306079A1 (fr) * 1987-09-02 1989-03-08 Picanol N.V. Procédé pour réparer un fil de trame aux métiers à tisser

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1152739A (fr) * 1955-05-10 1958-02-24 Procédé et dispositif pour maintenir la tension du fil à une valeur uniforme, notamment dans les bobinoirs
EP0225670A1 (fr) * 1985-12-09 1987-06-16 Picanol N.V. Procédé et dispositif pour dérouler un fil d'une bobine dans les métiers à tisser
EP0306079A1 (fr) * 1987-09-02 1989-03-08 Picanol N.V. Procédé pour réparer un fil de trame aux métiers à tisser

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514322A1 (fr) * 1991-05-15 1992-11-19 Sulzer RàœTi Ag Dispositif pour alimenter un métier à tisser en bobines de réserve de fil de trame et procédé pour actionner le dispositif
US5247969A (en) * 1991-05-15 1993-09-28 Sulzer Brothers Limited Feeding and removing weft yarn stock bobbins to a loom bobbin frame

Also Published As

Publication number Publication date
JPH0327151A (ja) 1991-02-05

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