EP0301174A1 - Séparateur pour isoler des fils rangés côte à côte - Google Patents

Séparateur pour isoler des fils rangés côte à côte Download PDF

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Publication number
EP0301174A1
EP0301174A1 EP88106286A EP88106286A EP0301174A1 EP 0301174 A1 EP0301174 A1 EP 0301174A1 EP 88106286 A EP88106286 A EP 88106286A EP 88106286 A EP88106286 A EP 88106286A EP 0301174 A1 EP0301174 A1 EP 0301174A1
Authority
EP
European Patent Office
Prior art keywords
hook
needles
needle
thread
hooks
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.)
Granted
Application number
EP88106286A
Other languages
German (de)
English (en)
Other versions
EP0301174B1 (fr
Inventor
Wangner Gmbh Co Kg Hermann
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.)
Novatech GmbH Siebe und Technologie fuer Papier
Original Assignee
Herman Wangner GmbH and Co KG
Novatech GmbH Siebe und Technologie fuer Papier
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 DE19873724822 external-priority patent/DE3724822A1/de
Application filed by Herman Wangner GmbH and Co KG, Novatech GmbH Siebe und Technologie fuer Papier filed Critical Herman Wangner GmbH and Co KG
Priority to AT88106286T priority Critical patent/ATE87339T1/de
Priority to CA000573009A priority patent/CA1312529C/fr
Publication of EP0301174A1 publication Critical patent/EP0301174A1/fr
Application granted granted Critical
Publication of EP0301174B1 publication Critical patent/EP0301174B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D3/00—Woven fabrics characterised by their shape
    • D03D3/04—Endless fabrics
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0054—Seams thereof

Definitions

  • the invention is based on a separator for sequential detection of the threads of a line.
  • the separator consists of a frame in which a needle is guided and can be moved by a drive element.
  • the needle has a hook which is exposed in a mouth-like opening of the frame and engages in the foremost thread of the line-up.
  • Such separators are used in particular in seam weaving machines that connect the two ends of a fabric by means of a woven seam.
  • the fabrics thus made endless serve, for example, as sheet-forming screens in the wet end of a paper machine.
  • the ends of the warp threads are held in the order determined by the weave using a woven strip (line-up).
  • Separators are used to remove the warp threads from the woven strip in this order, ie to separate them.
  • the isolated warp threads are then entered into the shed of the seam weaving machine. It is essential that the sequence of the warp threads is strictly observed, otherwise errors will occur in the woven seam, which will be noticeable as a marking on paper.
  • a seam weaving machine is known from EP-B-0 043 441.
  • a separator of the type mentioned at the outset is known from DE-U-81 22 450, the thread to be picked up being pressed against the frame by the hook of the single needle and thereby clamped. Since the thread in the string, i.e. the woven strip, is firmly integrated, and a shifting of the thread up or down is required for clamping, the thread sometimes detaches from the hook. In the known separator there is also the risk that two threads will be caught by the hook. A touch on the needle makes this known, but it brings the seam weaving machine to a standstill. Particularly when making double-layer or multi-layer sheet forming screens endless, there is a great risk that two threads will be gripped by the separator at the same time.
  • the object of the invention is to improve the functional reliability of a separator, in particular by preventing malfunctions by simultaneously grasping two threads.
  • this object is achieved in that at least two needles, each with hooks of successive needles pointing in opposite directions, are guided in the frame and positively grip the foremost thread of the alignment.
  • a thread of the alignment can be reliably detected in any position along the stroke direction of the needles, so that malfunctions due to unsafe detection of the thread no longer occur.
  • the frame for executing a separation stroke can be displaced in the direction of the alignment, so that the detected thread is spatially separated from the subsequent threads.
  • needles each of which has two hooks pointing in the opposite direction and spaced apart from one another.
  • the shape of the hook can be adapted to the different diameter of the warp threads in the lower and upper fabric layers.
  • a thread is particularly securely gripped by the hook if the hook (s) engaging from one side is semicircular with a diameter corresponding to the thread diameter and the hook (s) engaging from the other side cooperating with it is similar to the other needles but with half Dimensions is formed so that they pierce about half the width in the thread and press it into the other hooks.
  • the needles are actuated for the clamping stroke by the drive element, eg pneumatic cylinder, in accordance with the weave of the fabric. Both needles are operated independently of one another.
  • the frame of the needles can also be moved by a similar drive element for the separation stroke.
  • the needles are made of particularly hard steel alloys, and the hooks are expediently shaped by a flat cutout on the front of the needles, the cutout being semicircular at both ends and the tips formed thereby forming the hooks.
  • the middle needle preferably has two hooks which correspond in size to the diameter of the thread to be picked up, while the two outer needles have hooks of approximately 60% in size compared to the diameter of the thread to be picked up.
  • the adaptation of the hook size to the thread diameter and thus an improvement in the functional reliability of the separator can also be achieved in that one or more step plates are guided parallel to the needles between or next to them and are displaceable by drive elements.
  • the step plate has at least one step on its front edge, which extends within the width of one of the hooks, so that the effective size of this hook can be reduced by moving the step plate.
  • Such a step plate is particularly advantageous if there are threads of very different diameters within the thread array, e.g. in addition to the longitudinal threads of the upper and lower layers of fabric, binding threads of significantly smaller diameter.
  • Such a step board already improves the functional reliability of a separator if it is provided between two synchronously driven needles, each with a hook, the two hooks as in accordance with the only hook provided in DE-U-81 22 450 grasp the foremost thread of a line by pushing it against the edge of the mouth-like opening of the frame.
  • the step plate preferably has two steps of different heights, so that it can assume a total of three positions, in the middle position it does not change the width of the hook, that is, the front edge of the step plate coincides with the front edge of the needle set back to form the hook .
  • the step plate preferably reduces the width of the hook by one third or two thirds, i.e. the height of the gradations is one third or two thirds of the reset of the front edge of the needles caused by the formation of the hook.
  • Figures 1 and 2 show in vertical and horizontal section a separator which has a frame 10, in which vertically displaceable needles 16, 18 are guided side by side.
  • the frame 10 is in the form of a block with a slot extending centrally in the vertical direction for receiving the needles 16, 18.
  • the mouth-like opening 12 extends approximately to the middle of the block, so that the front edges of the needles 16, 18 are exposed in the opening 12.
  • the frame 10 is driven by a conventional drive element, not shown, for example pneumatic cylinder for the separation stroke 36.
  • the frame 10 is guided through separation stroke guides 30.
  • the needles 16 and 18 are flat steel strips, on one edge of which is visible in the mouth-like opening 12, at a distance which corresponds approximately to the height of the opening 12, hooks 20, 22, 24 and 26 are formed.
  • both needles 16, 18 have flat recesses on the front edge, which end at the ends in pointed tips. These tips form the hooks 20, 22, 24, 26.
  • the hooks 20, 22, 24, 26 are semicircular, the radius of the semicircle of the hooks 20, 22 of the first needle 16 being the radius of the corresponds to individual threads.
  • the hooks 24, 26 of the second needle 18 are set back somewhat, also have a semicircular shape, but only about half the radius as the hooks 20, 22 of the first needle 16.
  • the lower hook 22 of the first needle 16 interacts with the opposite, upper hook 24 of the second needle 18. Both hooks are moved towards each other by moving the needles 16, 18 in the opposite direction, so that a thread 14 to be separated lies in the large hook 22 and is pressed in by the small hook 24.
  • the small hook 24 is offset from the front edge 32 of the needles via an edge 34 extending at an angle to the rear by approximately half the radius of the semicircular shape of the large hook 22.
  • the depth of the recess forming the hooks 20, 22, 24, 26 is different in the two needles 16, 18, namely approximately half the diameter of the threads 14 to be separated, for needle 16 and for needle 18 approximately a quarter diameter of the threads 14 to be separated .
  • the tips of the hooks 20, 22, 24, 26 are expediently manufactured by spark erosion.
  • FIGS. 4a to 4g show successively the interaction of the hooks 20, 22, 24, 26 when separating the successive threads 14a to 14g in the case of a 7-strand binding.
  • the thread 14a is held between the upper hook 20 of the first needle 16 and the lower hook 26 of the second needle 18.
  • the frame 10 is moved to the right in a separating stroke, so that the thread 14a is spatially separated from the subsequent threads 14b, 14c, etc. Because of this spatial separation, the thread 14a can then be gripped by gripping members and, after being released by the hooks 20, 26, can be inserted by the gripping members into the shed of the seam weaving machine.
  • the frame 10 has been moved back by the separation stroke.
  • the carriage on which the seam weaving machine is arranged together with the lifting elements for the shed formation, the gripper members and the drive elements for the needles 16, 18 has been moved further in accordance with the cycle of the weaving process, namely by the center distance between two threads 14, so that the next thread 14b is now deepest in the mouth-like opening 12 and of the upper hook 20 of the first needle 16 and the lower hook 26 of the second needle 18 can be gripped.
  • the thread 14b is separated again by the separating stroke from the subsequent threads 14c, 14d etc., picked up by the gripping members, released by the hooks 20, 26 and inserted into the shed by the gripping elements.
  • the frame 10 is then moved back to its starting position by the separation stroke.
  • thread 14c is gripped (Fig. 4c). Since this thread 14c is overlapped somewhat by the thread 14d in a vertical projection, it is positively gripped by the lower hook 22 of the first needle 16 and the upper hook 24 of the second needle 18. If the thread 14c, like the threads 14a and 14b, were gripped by the upper hook 20 of the first needle 16 and by the lower hook 26 of the second needle 18, there would be a risk that the upper hook 20 impaled and entrained the thread 14d, and thereby the threads 14c and 14d would be separated. This would get these two threads into the shed and cause a weaving error.
  • the thread 14d is again gripped by the upper hook 20 and the lower hook 26 (FIG. 4d).
  • the thread 14e is gripped by the upper hook 24 of the second needle and the lower hook 22 of the first needle (FIG. 4e). If the upper hook 20 of the first needle 16 is used, there is a risk that the thread 14f would be impaled.
  • the thread 14f is then gripped by the upper hook 20 and the lower hook 26 and the thread 14g by the upper hook 24 and the lower hook 22 (FIGS. 4f and 4g). Separation, release and entry into the shed take place as described in the thread 14a in FIG. 4a.
  • FIGs 6 and 7 show an embodiment of the separator similar to that of Figure 3, wherein all hooks 20, 22, 24, 26 have the same size and a step plate 40 is provided.
  • the needles 16, 18 are shown in their basic position so that they overlap in the drawing.
  • the step board 40 has two gradations 42, 44 of different heights a and b on its front edge.
  • the step plate 40 is driven similarly to the needles 16, 18, the step plate being shown in its central position in FIG. 6, in which it does not reduce the effective width of the hooks 20, 22, 24, 26.
  • the front edge of the step plate 40 is therefore aligned with the front edge of the flat recess formed by the formation of the hooks 20, 22, 24, 26 on the front edge of the needles 16, 18.
  • a thread 14 is securely grasped, the diameter of which is equal to the width of the hooks 20, 22, 24 and 26.
  • the step plate 40 is shifted upward, so that the existing in the mouth-like opening 12 Front edge of the step plate 40 by the height a of the first gradation 22 to the front, that is to the thread line 28 is offset.
  • the effective width of the hooks 20, 22, 24 and 26 is thereby reduced by the dimension a, so that correspondingly smaller threads 14 are reliably grasped in the position of the step plate 40 shown.
  • threads 14 with a diameter smaller by the dimension b would be reliably detected.
  • the step board 40 can be arranged between or to the side of the plurality of needles 16, 18. The same applies if several step boards 40 are provided.
  • An arrangement at the edge of the group of needles is expedient so that the lateral distance between the needles is as small as possible and the tilting forces acting on the thread are as small as possible.
  • the step plate 40 is arranged between two synchronously driven needles 15, 18.
  • the step board 40 is designed as in FIGS. 6 and 7 with two steps 42, 44 of different heights.
  • the needles 15 and 18 each have only one hook 24.
  • the hooks 24 press the thread 14 against the edge of the mouth-like opening 12, as is shown in FIG. Because the effective width of the hooks 24 can be adapted very precisely to the diameter of the thread 14 by moving the step plate 40, a secure gripping of a thread is also ensured in the embodiment of FIG. 8 and in particular it is prevented that several threads are gripped at the same time will.
  • the hooks 24 press the thread 14 to be gripped against the lower edge of the mouth-like opening 12. If hooks 26, which point upwards instead of the hooks 24 pointing downward, are formed on the needles 15, 18, the separator operates in the way that the hooks 26 press the thread 14 to be gripped against the upper edge of the mouth-like opening 12.
  • the synchronously driven needles 15, 18 can each have a hook 24 pointing downwards and a hook 26 pointing upwards and then cooperate with both the upper and the lower edge of the mouth-like opening 12.
  • the hooks 24 and 26 can have the same or different sizes, the effective size can be reduced by the position of the step plate 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Knitting Machines (AREA)
EP88106286A 1987-07-27 1988-04-20 Séparateur pour isoler des fils rangés côte à côte Expired - Lifetime EP0301174B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT88106286T ATE87339T1 (de) 1987-07-27 1988-04-20 Separator zum vereinzeln von in einer aufreihung gehaltenen faeden.
CA000573009A CA1312529C (fr) 1987-07-27 1988-07-26 Mecanisme separateur de fils groupes

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19873724822 DE3724822A1 (de) 1987-07-27 1987-07-27 Separator zum vereinzeln von in einer aufreihung gehaltenen faeden
DE3724822 1987-07-27
DE8713074U 1987-09-29
DE8713074U DE8713074U1 (fr) 1987-07-27 1987-09-29

Publications (2)

Publication Number Publication Date
EP0301174A1 true EP0301174A1 (fr) 1989-02-01
EP0301174B1 EP0301174B1 (fr) 1993-03-24

Family

ID=25857986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88106286A Expired - Lifetime EP0301174B1 (fr) 1987-07-27 1988-04-20 Séparateur pour isoler des fils rangés côte à côte

Country Status (3)

Country Link
US (1) US4866821A (fr)
EP (1) EP0301174B1 (fr)
DE (2) DE8713074U1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8903454U1 (fr) * 1989-03-20 1990-07-26 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen, De
DE9002278U1 (fr) * 1990-02-26 1991-07-25 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen, De
EP0440595A2 (fr) * 1990-01-31 1991-08-07 Asten, Inc. Dispositif pour relacher sélectivement des fils d'une frange
DE20105091U1 (de) * 2001-03-23 2002-09-05 Wangner Finckh Gmbh & Co Kg Spannzange für Nahtwebmaschinen
WO2005090663A1 (fr) * 2004-03-19 2005-09-29 Wangner Gmbh & Co. Kg Platine pour separateur de metier a tisser avec formation de couture

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3714517A1 (de) * 1987-04-30 1988-11-17 Oberdorfer Fa F Fadentrenner fuer nahtmaschinen, insbesondere zum nahten von entwaesserungssieben, trockensieben, filzen u. dgl.
US5212858A (en) * 1990-01-31 1993-05-25 Asten Group, Inc. Apparatus for capturing and stabilizing a yarn
WO2005065855A1 (fr) * 2004-01-03 2005-07-21 Sms Demag Ag Dispositif d'etancheite pour paliers de laminoir

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025909A1 (de) * 1980-07-09 1982-02-04 Rudolf Prof.Dr.-Ing. Koller Verfahren und vorrichtung zum erstellen einer webnaht als verbindung zweier gewebeenden
DE8122450U1 (de) * 1981-07-30 1983-01-13 Fa. F. Oberdorfer, 7920 Heidenheim Vorrichtung zum fortlaufenden vereinzeln von in einer aufreihung gehaltenen faeden
DE3507450A1 (de) * 1985-03-02 1986-09-04 Thomas Josef Heimbach GmbH & Co, 5160 Düren Vorrichtung zum ausriffeln von faeden aus einem gewebe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US977166A (en) * 1906-01-15 1910-11-29 Barber Colman Co Thread-selecting device.
US2313195A (en) * 1940-05-23 1943-03-09 Fleischer Svend Sigur Christie Thread isolating device
US4581794A (en) * 1984-03-07 1986-04-15 Asten Group Inc. Automatic seaming machine for fabric belts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025909A1 (de) * 1980-07-09 1982-02-04 Rudolf Prof.Dr.-Ing. Koller Verfahren und vorrichtung zum erstellen einer webnaht als verbindung zweier gewebeenden
DE8122450U1 (de) * 1981-07-30 1983-01-13 Fa. F. Oberdorfer, 7920 Heidenheim Vorrichtung zum fortlaufenden vereinzeln von in einer aufreihung gehaltenen faeden
DE3507450A1 (de) * 1985-03-02 1986-09-04 Thomas Josef Heimbach GmbH & Co, 5160 Düren Vorrichtung zum ausriffeln von faeden aus einem gewebe

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8903454U1 (fr) * 1989-03-20 1990-07-26 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen, De
EP0440595A2 (fr) * 1990-01-31 1991-08-07 Asten, Inc. Dispositif pour relacher sélectivement des fils d'une frange
EP0440595A3 (en) * 1990-01-31 1992-01-02 Asten Group, Inc. Apparatus for selectively releasing yarns from a fringe
DE9002278U1 (fr) * 1990-02-26 1991-07-25 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen, De
EP0444587A1 (fr) * 1990-02-26 1991-09-04 NOVATECH GmbH Siebe und Technologie für Papier Crochet et séparateur pourvu d'un tel crochet pour prendre et isoler des fils
DE20105091U1 (de) * 2001-03-23 2002-09-05 Wangner Finckh Gmbh & Co Kg Spannzange für Nahtwebmaschinen
US6948531B2 (en) 2001-03-23 2005-09-27 Wangner Finckh Gmbh & Co. Kg Gripping collet for seam-weaving machines
WO2005090663A1 (fr) * 2004-03-19 2005-09-29 Wangner Gmbh & Co. Kg Platine pour separateur de metier a tisser avec formation de couture

Also Published As

Publication number Publication date
DE8713074U1 (fr) 1988-11-24
US4866821A (en) 1989-09-19
DE3879567D1 (de) 1993-04-29
EP0301174B1 (fr) 1993-03-24

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