EP0289640B1 - Séparateur de fils pour machine à réunir les extrémités de toiles pour machines à papier - Google Patents

Séparateur de fils pour machine à réunir les extrémités de toiles pour machines à papier Download PDF

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Publication number
EP0289640B1
EP0289640B1 EP87106666A EP87106666A EP0289640B1 EP 0289640 B1 EP0289640 B1 EP 0289640B1 EP 87106666 A EP87106666 A EP 87106666A EP 87106666 A EP87106666 A EP 87106666A EP 0289640 B1 EP0289640 B1 EP 0289640B1
Authority
EP
European Patent Office
Prior art keywords
thread
hooks
separator according
needles
threads
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
EP87106666A
Other languages
German (de)
English (en)
Other versions
EP0289640A1 (fr
Inventor
Bernhard Dr. Krenkel
Fritz Vöhringer
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.)
Cessione wis Engineering GmbH
Original Assignee
F Oberdorfer & Co KG Industriegewebe-Technik GmbH
F Oberdorfer & Co KG Industriegewebe-Technik GmbH
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 F Oberdorfer & Co KG Industriegewebe-Technik GmbH, F Oberdorfer & Co KG Industriegewebe-Technik GmbH filed Critical F Oberdorfer & Co KG Industriegewebe-Technik GmbH
Priority to DE8787106666T priority Critical patent/DE3773487D1/de
Priority to EP87106666A priority patent/EP0289640B1/fr
Priority to AT87106666T priority patent/ATE68024T1/de
Priority to ES198787106666T priority patent/ES2025577T3/es
Publication of EP0289640A1 publication Critical patent/EP0289640A1/fr
Application granted granted Critical
Publication of EP0289640B1 publication Critical patent/EP0289640B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 relates to a thread separator for sewing machines, in particular for sewing drainage fabrics, dryer fabrics, felting and the like.
  • a separator head in a to the plane of the row to be separated threads of the screen fabric substantially perpendicular plane which is movable in this plane and can be pushed against the thread row, with a leg behind the thread row of the separator head, which has an inlet gap for the thread row has and with a in the separating head by a controllable drive with respect to the thread row in a guide groove displaceable needle.
  • Known thread separators of this type are required for separating threads during seam formation to close open woven fabric webs by means of an auxiliary chain, the warp thread ends of the fabric web held on both sides of the auxiliary chain being detected and alternately in from both sides the subject formed in the auxiliary chain are introduced. Automation of the entire seam formation process presupposes that this process runs smoothly insofar as the thread separator always separates the warp thread ends only one thread is gripped and severed from the row of threads, and not several, whereby this grasping must also exclude with certainty that the thread to be separated is impaled by the thread separator.
  • the known thread separator fulfills these requirements only inadequately, so that the object of the invention is to optimize the functional reliability of the thread separator in that the hook needles are designed in such a way that a separation of the foremost thread in each case of a line of longitudinal thread ends of a fabric is achieved and all Piercing and taking away the following thread is avoided.
  • the hook needles are designed as compartment needles, which are provided with hooks, of which at least two with respect to the top and the bottom of the fabric associated with the row of threads are opposite each other in the same plane or parallel planes, the tips of which each opposite thread surface are directed and their concave recesses are shaped to match the diameter and shape of the individual threads to be picked up in such a way that piercing of the thread to be separated by the tips and taking away the following thread can be avoided.
  • This construction ensures that with the aid of a hook system consisting of at least two opposing hooks of the compartment needles, each matched to the threads to be separated, depending on the control, coming from the running side or paper side direction, the foremost warp thread of a row of threads is gripped and separated, whereby one of the hooks is responsible for a particular type of thread and / or one side of the fabric.
  • the thread separator shown in Fig. 1 is known. It differs from the thread separator according to the invention shown in FIG. 2 essentially only with regard to the single looper needle with only one hook, so that the same reference numerals are used for the corresponding parts of the thread separator of further embodiments.
  • the thread separator 1 has a separator head 2, which is arranged in a thread 13 (FIGS. 3 and 4) which is to be separated from one another to the plane of a row 9, that is to say to be separated, in a substantially vertical plane and can be displaced in this plane against the thread row.
  • the separating head 2 there is at least one gripper needle which can be displaced by a controllable drive with respect to the thread row and which is movable in a groove 3 in the separating head and acted upon by a leaf spring 16 and which is designed as a section needle 4 provided with at least one hook 6, 7.
  • the compartment needle or compartment needles have at least two hooks 6, 7 opposite each other in the same plane with respect to the top 5 and bottom 8 of the fabric strip or magazine bundle belonging to the thread row 9, the tips 10, 11 of which are directed towards the respective opposite thread surface 12.
  • the hooks 6, 7 are each provided with a concave recess 14, 15, which - as can be seen from FIGS. 2, 3 and 4 - advantageously lie in a compartment needle.
  • These concave recesses have a radius of curvature which corresponds to the curvature of the surface 12 of the thread 13, and can therefore also be curved differently to adapt to the diameter of the thread 13 to be picked up during separation.
  • the length of the arc of curvature of the concave recesses 14, 15 of the hooks 6, 7 corresponds to approximately half the thread circumference in the case of a circular thread cross section, as shown in FIGS. 3 and 4.
  • the shape of the hooks 6, 7 is selected so that piercing of the thread 13 to be separated by the respective tip 10, 11 and entrainment of the follower thread 18 are avoided.
  • the mutual spacing of the tips 10, 11 of the hooks 6, 7 is selected as shown in FIG. 2 that it corresponds approximately to the width (a) of the inlet gap 17 in the separating head 2 for the thread row 9.
  • This inlet gap width is adapted to the fabric thickness and is approximately between 0.5 and 3 mm, a width of 1.0 mm having proven to be particularly advantageous.
  • a narrow guide groove in the separator head without rounded edges is advantageous for optimal functioning of the thread separator, so that with appropriate adjustment of the configuration of the hooks or compartment needles, the guide groove and the inlet gap width, a tension adjustment of the fabric strip is unnecessary, by which to ensure the desired functional reliability of the thread separator, ie to avoid piercing and taking along the subsequent thread 18 when separating the thread 13 with certainty.
  • a tension adjustment of the fabric strip is unnecessary, by which to ensure the desired functional reliability of the thread separator, ie to avoid piercing and taking along the subsequent thread 18 when separating the thread 13 with certainty.
  • a e.g. compartment needle with a double hook inside the thread separator prevents weaving errors in the seam by simultaneously twisting two threads.
  • FIGS. 5 to 7 schematically show, using a partial side view of a compartment needle 4 according to the invention with its double hook, the manner in which the needle separates the threads in different types of fabric.
  • the two hooks of the needle marked in FIGS. 2 to 4 with 6 and 7 but not shown in FIGS. 5 to 7 are adapted in size to the respective warp thread diameters and take them depending on Control from the leading side and paper side direction of the front warp thread to separate it.
  • the compartment needles 4 are controlled via a programmed cam disc in the program switching mechanism or, in the case of jacquard seams, via program needles and the correspondingly programmed jacquard card.
  • the digits 1 to 7 (Fig. 5), 1 to 10 (Fig. 6) and 1 to 9 (Fig. 7) and their page assignment show the order and the page affiliation of the taps made by the hooks.
  • the left or lower hook of the section needle 4 is required to separate the warp threads 2, 3, 5 and 7 on the paper side of the fabric, while the right, upper hook of the section needle the warp threads 1 , 4 and 6 isolated on the running side of the fabric.
  • the so-called F-23 fabric the second and third warp threads on the paper side are consecutive and all others are alternately picked up or tapped alternately between the running side and the paper side.
  • the mode of operation of the thread separator according to the invention or the compartment needle 4 with double hook used in separating threads of a composite fabric is shown in FIG. 6.
  • the paper side and the running side of the fabric are picked up alternately by the lower and upper hook.
  • FIG. 6 For another composite fabric, as can be seen from FIG.
  • the warp threads are separated in alternation between paper side, paper side and running side of the fabric, working with a small hook for the paper side and a large hook for the running side, as from the different diameters the threads of the paper side and the running side shown in section and also from the different hook sizes of the double hook of this compartment needle can be seen.
  • the construction according to the invention also has the advantage that the dividing needle 4 fits into any standard thread separator or that each such thread separator can be retrofitted with little effort in this regard.
  • the functional improvement not only means that the simultaneous separation of two successive threads is avoided, but also that the setting of the thread separator is simplified.
  • the separator head For many fabrics, it is sufficient to work with a single section needle in the separator head, the opposite hooks of which are shaped depending on the fabric. In the case of fabrics with several types of longitudinal thread of different thicknesses, however, it may be necessary to arrange a plurality of section needles one above the other in the guide groove of the separating head, each needle being individually movable and, according to a control program, dividing the threads of the thread types assigned to them. As shown in FIG. 8, the compartment needles can also be provided with only one hook, it being important to note that at least two of all the hooks are arranged opposite one another.
  • the invention is not limited to certain, e.g. circular hook shapes limited.
  • the recesses can also be profiled threads such as Be adapted to flat wires.

Landscapes

  • Woven Fabrics (AREA)
  • Filtering Materials (AREA)
  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (13)

  1. Séparateur de fils pour machine à réunir, en particulier les toiles d'égouttage, les toiles sécheuses, les feutres et analogues, avec une tête séparatrice ménagée essentiellement perpendiculairement au plan de la rangée de fils destinés à être séparés les uns des autres sur une bande de tissu, ladite tête étant mobile dans un plan et mobile par rapport à la rangée de fils, avec une branche de la tête séparatrice venant en prise à l'arrière de la rangée de fils, et comportant une fente introductrice de la rangée de fils et au moins une aiguille à crochets ménagée dans la tête séparatrice, mobile dans une rainure de guidage par rapport la rangée de fils au moyen d'une commande réglable, caractérisé par le fait que les aiguilles accrocheuses sont conçues sous forme d'aiguilles de cloisonnement (4), munies de crochets dont au moins deux (6, 7) se font face par rapport à la face supérieure (5) et à la face inférieure (8) de la bande de tissu ou du magasin formant la rangée de fils, les pointes (10, 11) des crochets étant toujours tournées vers la surface (12) du fil (13) destiné à être séparé et par le fait que les évidements concaves (14, 15) des crochets ont un diamètre et/ou une forme adaptée au fil destiné à être recueilli au moment de la séparation.
  2. Séparateur de fils suivant la revendication 1, caractérisé par le fait qu'au moins deux fils opposés (6, 7) se trouvent dans différentes aiguilles de cloisonnement (4).
  3. Séparateur de fils suivant la revendication 1, caractérisé par le fait qu'au moins une aiguille de cloisonnement (4) est munie de deux crochets opposés (6, 7).
  4. Séparateur de fils suivant les revendications 1 et 3, caractérisé par le fait que le séparateur de fil ne contient qu'une seule aiguille de cloisonnement (4).
  5. Séparateur de fils suivant l'une quelconque des revendications 1 à 4, caractérisé par le fait que les évidements concaves (14, 15) des crochets (6, 7) ont un rayon de courbure correspondant sensiblement à la courbure de la surface (12) du fil (13).
  6. Séparateur de fils suivant l'une quelconque des revendications 1 à 5, caractérisé par le fait qu'au moins deux évidements (14, 15) des crochets (6, 7) ont des rayons de courbure identiques.
  7. Séparateur de fils suivant l'une quelconque des revendications 1 à 5, caractérisé par le fait qu'au moins deux évidements (14, 15) des crochets (6, 7) ont des rayons de courbure différents.
  8. Séparateur de fils suivant l'une des revendications 1 à 7, caractérisé par le fait que la longueur des arcs de courbure des évidements concaves (14, 15) des crochets (6, 7) correspond sensiblement à la moitié de la circonférence du fil ayant une section transversale circulaire.
  9. Séparateur de fils suivant l'une quelconque des revendications 1 à 8, caractérisé par le fait que l'écart mutuel des pointes (10, 11) des crochets (6, 7) est au moins aussi grand que la largeur (a) de la fente introductrice (17).
  10. Séparateur de fils suivant l'une quelconque des revendications 1 à 9, caractérisé par le fait que la commande des aiguilles de cloisonnement (4) est assurée par une plaque à cames programmée à l'aide d'un programmateur.
  11. Séparateur de fils suivant l'une quelconque des revendications 1 à 9, caractérisé par le fait que la commande des aiguilles de cloisonnement (4) est obtenue par l'intermédiaire d'un dispositif de balayage qui est actionné par un carton Jacquard programmé en conséquence.
  12. Séparateur de fils suivant l'une quelconque des revendications 1 à 11, caractérisé par le fait que la largeur (a) de la fente introductrice (17) est supérieure de 0,5 mm à l'épaisseur de la bande de tissu.
  13. Séparateur de fils suivant l'une quelconque des revendications 1 à 12, caractérisé par le fait que plusieurs aiguilles de cloisonnement (4) superposées, dont les crochets (6, 7) sont adaptés à différents diamètres de fils du tissu, peuvent être déplacées par différents éléments d'entraînement de la commande réglable.
EP87106666A 1987-05-07 1987-05-07 Séparateur de fils pour machine à réunir les extrémités de toiles pour machines à papier Expired - Lifetime EP0289640B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8787106666T DE3773487D1 (de) 1987-05-07 1987-05-07 Fadentrenner fuer nahtmaschinen, insbesondere zum nahten von entwaesserungssieben,trockensieben, filzen u.dgl.
EP87106666A EP0289640B1 (fr) 1987-05-07 1987-05-07 Séparateur de fils pour machine à réunir les extrémités de toiles pour machines à papier
AT87106666T ATE68024T1 (de) 1987-05-07 1987-05-07 Fadentrenner fuer nahtmaschinen, insbesondere zum nahten von entwaesserungssieben,trockensieben, filzen u.dgl.
ES198787106666T ES2025577T3 (es) 1987-05-07 1987-05-07 Separador de hilos para maquinas de costura, especialmente para la costura de cribas de desaguar, cribas secadoras, fieltros y semejantes.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87106666A EP0289640B1 (fr) 1987-05-07 1987-05-07 Séparateur de fils pour machine à réunir les extrémités de toiles pour machines à papier

Publications (2)

Publication Number Publication Date
EP0289640A1 EP0289640A1 (fr) 1988-11-09
EP0289640B1 true EP0289640B1 (fr) 1991-10-02

Family

ID=8196964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87106666A Expired - Lifetime EP0289640B1 (fr) 1987-05-07 1987-05-07 Séparateur de fils pour machine à réunir les extrémités de toiles pour machines à papier

Country Status (4)

Country Link
EP (1) EP0289640B1 (fr)
AT (1) ATE68024T1 (fr)
DE (1) DE3773487D1 (fr)
ES (1) ES2025577T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8903454U1 (de) * 1989-03-20 1990-07-26 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Separator für Nahtmaschinen
DE9002278U1 (de) * 1990-02-26 1991-07-25 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Platine für einen Separator zum Erfassen und Vereinzeln von Fäden
DE202004004490U1 (de) * 2004-03-19 2004-05-27 Wangner Gmbh & Co. Kg Platine für den Separator einer Nahtwebmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8122450U1 (de) * 1981-07-30 1983-01-13 Fa. F. Oberdorfer, 7920 Heidenheim Vorrichtung zum fortlaufenden vereinzeln von in einer aufreihung gehaltenen faeden

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025909C2 (de) * 1980-07-09 1983-07-14 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Verfahren und Vorrichtung zum Herstellen einer Webnaht zwischen zwei Gewebeenden
US4581794A (en) * 1984-03-07 1986-04-15 Asten Group Inc. Automatic seaming machine for fabric belts

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8122450U1 (de) * 1981-07-30 1983-01-13 Fa. F. Oberdorfer, 7920 Heidenheim Vorrichtung zum fortlaufenden vereinzeln von in einer aufreihung gehaltenen faeden

Also Published As

Publication number Publication date
ATE68024T1 (de) 1991-10-15
DE3773487D1 (de) 1991-11-07
ES2025577T3 (es) 1992-04-01
EP0289640A1 (fr) 1988-11-09

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