EP1123430B1 - Metier a tisser a pinces comportant au moins une bande a pinces et des moyens de guidage - Google Patents

Metier a tisser a pinces comportant au moins une bande a pinces et des moyens de guidage Download PDF

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Publication number
EP1123430B1
EP1123430B1 EP99917854A EP99917854A EP1123430B1 EP 1123430 B1 EP1123430 B1 EP 1123430B1 EP 99917854 A EP99917854 A EP 99917854A EP 99917854 A EP99917854 A EP 99917854A EP 1123430 B1 EP1123430 B1 EP 1123430B1
Authority
EP
European Patent Office
Prior art keywords
gripper
rib
guide
gripper band
rapier
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
EP99917854A
Other languages
German (de)
English (en)
Other versions
EP1123430A1 (fr
Inventor
Kristof Roelstraete
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.)
Picanol NV
Original Assignee
Picanol NV
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 DE19838476A external-priority patent/DE19838476A1/de
Priority claimed from BE9800781A external-priority patent/BE1013013A3/nl
Application filed by Picanol NV filed Critical Picanol NV
Publication of EP1123430A1 publication Critical patent/EP1123430A1/fr
Application granted granted Critical
Publication of EP1123430B1 publication Critical patent/EP1123430B1/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
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D03D47/272—Rapier bands

Definitions

  • the invention relates to a rapier weaving machine with at least one gripper belt which drives a gripper, which lies substantially above the top of the gripper belt, and with a sley, on which a reed and guide means are mounted, which have guides for the gripper belt, the top, a side edge and the bottom of the rapier band and a downwardly projecting rib are assigned.
  • a rapier weaving machine of the type mentioned uses the applicant in their time to market rapier looms.
  • the construction essentially corresponds to the US 5,413,151 .
  • a guide member is mounted in the longitudinal center of a gripper is attached.
  • the guide part whose width corresponds to the width of the rapier band, has on the side facing away from the reed a downwardly projecting rib.
  • the guide member and the rapier band are guided with attached to the sley hook-shaped guide means which are open to reed out.
  • the hook-shaped guide means have guides that the top of the guide member and the rapier band and the underside of the guide member and the Gripper band are assigned.
  • Another guide is assigned to the reed facing away from the side edge of the rapier band and the guide member. Further, guides are provided which guide the rib of the guide member in the transverse direction, so that the guide member is guided on all sides with the gripper. This construction works reliably. A problem, however, is that in this type - as well as in all other practical types used - relatively quickly such a strong wear occurs that the guide member must be replaced.
  • hook-shaped guide elements are attached to the batten, which almost completely enclose the top and bottom of the rapier band.
  • the underside of the rapier band is provided with a longitudinally extending groove, engage in the guides of the hook-shaped guide means, so that the rapier band is also guided in the transverse direction.
  • the gripper is attached laterally to the rapier band.
  • the lateral arrangement of the gripper on the gripper belt leads to significant lateral loads of the rapier band, especially during braking and acceleration, so that also a relatively heavy wear occurs. If a certain amount of wear is achieved, the entire gripper band must be replaced in this type.
  • the invention has for its object to improve a rapier of the type mentioned so that the wear is reduced.
  • the rib extends at least over the length of the rapier band, which is insertable into a shed, and arranged at a lateral distance to the side edges of the rapier band in that the guide means form guides for the upper side, the side flank and the underside of the rapier band in the edge region of the rapier band facing away from the reed, and in that the guide means in the area facing the reed guides for the underside of the rapier band and for the side flank facing the reed form the rib, while the bottom and the reed facing away from the side edge of the rib are unguided.
  • the invention is based on the consideration that the main cause of the wear are forces that are caused in particular during braking and acceleration of the rapier head, which lies with its center of mass above the top of the rapier band, so that the forces have a tendency to gripper belt and Givenfallas a gripper band extending, carrying the gripper guide member to rotate about the longitudinal axis.
  • the invention therefore provides that the guides that counteract the rotation of the rapier band, attack with the most favorable lever arms to the rapier, so that the forces acting against twisting forces are reduced. Since the rib is arranged at a distance from the side of the gripper belt remote from the reed, it is made possible that the guide means form guides for the underside of the gripper belt on both sides of the rib.
  • a particular advantage consists in the fact that the side facing away from the reed and thus the edge of the goods facing side edge and the underside of the rib do not cooperate with guides of the guide means. These surfaces, which come into contact with warp threads when closing the shed, are therefore not exposed to wear on the guides, so that they are not expected to damage the warp threads.
  • the weaving machine shown in Fig. 1 has two side parts 1, 2 in which a sley 3 is mounted.
  • the sley 3 is provided on both sides with drives 4, 5, by means of which it is driven to a reciprocating motion.
  • drives 4, 5 by means of which it is driven to a reciprocating motion.
  • a reed 6 is arranged by means of which registered weft threads are struck at the edge of the goods.
  • the weft threads are introduced in a known manner by means of a Gebergreifers 7 and a gripper rapier 8 in a shed.
  • the grapple 7 takes on the one side of the loom in a known manner a weft and transports him to about the middle of the loom, i. in the middle of a shed. There he is taken over by the gripper rapier 8, which then brings him to the opposite side of the loom.
  • the Gebergreifer 7 and the slave gripper 8 are each driven by a gripper belt 9, which push the gripper rapier 8 and the Gebergreifer 7 each in an open shed and pull out again.
  • the gripper belts 9 are preferably made of fiber-reinforced plastic and have a substantially flat, rechteckig cross-section, with their flat sides are each approximately horizontal. From the bottom protrudes downwards from a longitudinal rib 53, the height of which corresponds approximately to the thickness of the rapier bands 9. The width of the rib 53 corresponds approximately to its height.
  • the gripper bands 9 are guided in the region of the side parts 1, 2 by means of stationary guides 10, 11.
  • the gripper belts are driven by means of gears 12, 13, around which they are guided. They are held by incidentssblökken 14 on the circumference of the gears 12, 13.
  • the gears 12, 13 are driven by means of drives 15, 16 to reciprocating rotary motion.
  • the drives 15, 16 are synchronized with the drives 4, 5 of the sley 3.
  • the grapple gripper 7 and the gripper rapier 8 are arranged directly on the ends of the rapier belts 9 or on guide parts which are respectively attached to the front ends of the gripper belts 9.
  • the guide parts are designed so that they correspond to the cross section of the rapier bands 9.
  • the gripper bands 9 are guided by means of guide means 17.
  • These guide means 17, which will be explained in detail in the following figures, are components which have only a small extent in the longitudinal direction of the shed and which are exaggerated in FIG. 1 for illustrative purposes.
  • the guide means 17 are arranged on the sley 3, so that they move with the sley 3 and the reed 6. They dive from below into a shed 21, as shown in FIGS. 2 and 3.
  • This shed 21 is formed by an upper warp sheet 22 and a lower Kettfadenschar 23, which are raised and lowered by means not shown shed forming means and converge in the fabric edge 24.
  • the thread guide means 17 are formed so narrow in the longitudinal direction of the shed 21 that they can pass between the warp threads of the lower warp sheet 23.
  • the guide means 17 are moved out of the shed 21 by the lower warp sheet 23. If the reed 6 is moved back into the position shown in solid lines in FIG. 3, the guide means 17 again penetrate the lower warp sheet 23 and enter the shed 21. After striking a weft, the shed 21 is changed, wherein at least a portion of the warp threads of the upper warp sheet 22 down and at least a portion of the warp threads of the lower warp sheet 23 are moved upward.
  • the guide means 17 are fastened by means of screws 25 to a sley profile 26.
  • the grapple gripper 7 and the gripper rapier 8 can be attached to guide parts 18 (FIG. 12), which are arranged in aligned extension of the rapier belts 9.
  • guide parts 18 FIG. 12
  • the rapier band 9 of the gripper rapier 8 is mirror-inverted, the description also applies to the guidance of the rapier band 9 of the gripper rapier.
  • the gripper belt 9 shown in FIGS. 2 and 3 has a cross-shaped cross section with arms 50, 51, 52 and 53 arranged symmetrically with respect to a central vertical plane of symmetry 34.
  • the arm 53 forms a downwardly projecting rib.
  • rows of holes 58, 59 are provided (Fig. 4), which are intended for engagement of arranged in two rows of teeth of the drive gears 12, 13.
  • the guide means 17 have two guide elements 55, 56, of which the guide elements 55 are assigned to the gripper belt 9 on the reed facing side 6 and the guide elements 56 to the gripper belt 9 on the reed 6 side facing away.
  • the guide elements 56 form three guides, of which a guide 31 of the top of the rapier band 9, a guide 34 of the reed 6 remote from the side edge and a guide 32 of the bottom of the rapier band 9 is assigned. These three guides 31, 34, 32 grasp the side edge area of the rapier band 9 facing away from the reed 6.
  • the guide elements 55 form two guides, of which a guide 29 is assigned to the reed 53 facing the reed 53 on the underside of the rapier band 9, while the further guide 30 is associated with the reed 6 facing the side edge of the rib 53. Between the guide 32 and the reed 53 facing away from the side edge of the rib 53, a distance A is left, so that neither this side flank nor the bottom of the rib 53 guides the guide means 17 are assigned. These surfaces are therefore no wear exposed so that they are not worn or damaged. As can be seen in particular from FIG.
  • the warp threads upon closing the shed 21, when the looper bands 9 have not yet been completely pulled out of the shed, contact this rib 53, so that they are guided by elements of the looper band 9, which are not exposed to wear.
  • This rib 53 extends at least over the length of the rapier band 9, which is insertable into the shed 21.
  • the embodiment of FIG. 5 differs from the embodiment of FIGS. 2 and 3 mainly by the guide means.
  • the guide elements 55, 56 are arranged offset to one another in the direction of movement of the rapier band 9.
  • the guide elements 55 and the guide elements 56 can each be individual components which are fastened to the sley profile 26 separately from one another by means of screws 25.
  • components are provided which each contain a guide element 55 and a guide element 56 as a structural unit, but which have a spacing from one another in the direction of movement of the gripper bands 9.
  • the guide elements 55 have as in the embodiment of FIGS. 2 and 3 one of the reed 6 facing side edge of the rib 53 associated guide 30 and the underside of the rapier band 9 associated guide 29.
  • the guide 29 extends approximately over one third of the width of Gripper belt 9.
  • the guide elements 56 grasp the gripper belt 9 on the side facing away from the reed 6 and have a guide 31 associated with the top, a guide 32 associated with the underside and a guide 34 associated with the intermediate side flank.
  • fastening means 35 of the gripper 7 are eccentrically offset in the direction of the reed 6 attached to the rapier band 9 or a guide part.
  • the guides 29, 32 and 31 guide the gripper belt 9 in the vertical direction.
  • the guides 30 and 34 guide the gripper belt 9 in the horizontal direction, so that the gripper belt 9 is guided in all directions.
  • the guide means 55, 56 distributed at regular intervals in the longitudinal direction of the shed 21 are arranged.
  • the guide means 56 and possibly also, the guide means 55 are arranged in denser sequence.
  • the use of two different types of guide means 55, 56 respectively forming guides 29, 30 and 31, 32, 34 facing each other has the advantage that All guides are accessible to a grinding tool and therefore can be processed by grinding.
  • the guides 29, 30 of the guide means 55 can be processed by means of separate grinding operations or by means of a profile grinding wheel.
  • the guides 31, 32, 34 of the guide means 56 can be edited very accurately by means of a profile grinding wheel.
  • This grinding of the guides 29 to 34 has the advantage that very smooth guide surfaces can be created, and that these guides can be tolerated very closely to each other.
  • two types of guide means are provided in which the guides 29 to 34 are distributed in other ways.
  • a hook-shaped guide means having the guides 29, 30, 31, 34 and a second guide means provided with the guide 32.
  • a guide means with the guides 29, 30, 32 and a further guide means with the guides 31, 34.
  • a guide means may be provided corresponding to the guide means 55 having the guides 29 and 30, and in addition to this guide means a guide means with the guides 31, 34 and a further guide means with the guide 32nd
  • FIG. 6 differs from the embodiment of FIGS. 3 and 5 initially in that the rib 53 'of the rapier band 9' is not in the longitudinal center plane, but offset towards the edge of the product 24.
  • a metal guide rib 28 which extends substantially the length of the gripper.
  • a guide rib 28 ' is provided in the form of an angularly bent sheet 70, one leg of which is arranged next to the rib 53' on the side which does not assign a guide is.
  • This rib holds a distance B to the guide elements 56, so that these guide rib 28 'can not be damaged.
  • the guide rib 28 ' protrudes downwards over the rib 53'.
  • the bent plate 70 is provided in the region opposite the guide rib 28 with a plurality of lugs 71 which engage in recesses 72 which are provided in the top of the beginning of the rapier band 9, as shown in Fig. 10.
  • the sheet 70 is held clamped by means of the lugs 71 between gripper 7 and gripper belt 9 '.
  • Fig. 10 is also shown that the gripper belt 9 'is provided with a row of holes 60 which serves to receive the teeth of the gears 12, 13.
  • This row of holes 60 is arranged off-center next to the rib 53 ', on the reed closer to the reed 6.
  • the holes of the rows of holes must pass through the rib 53 '.
  • the Gebergreifer 7 and / or the gripper grab 8 not directly to attach to the front end of the rapier band 9, but on a guide member 18 produced as a separate component whose contour of Contour of the rapier band 9 substantially corresponds.
  • a guide member 18 is suitably made of plastic.
  • the gripper belt 9 according to FIGS. 12 and 13 has a contour similar to the contour of the gripper belt according to FIG. 3, but the rows of the holes 58, 59 are arranged offset to one another in the longitudinal direction of the gripper belt 9, in the two rows of teeth of the drive gears 12, 13 engage.
  • the rib 53, 53 ' can be made in one piece with the respective rapier band 9, 9'. It is also possible to produce the rib 9, 9 'as a separate component and subsequently attached to the underside of the rapier band 9, 9', for example by means of screwing.
  • the gripper belts 9, 9 ' are not guided around the drive gears 12, 13 as in FIG. 1, but are guided tangentially to these drive gears.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (11)

  1. Métier à tisser à pinces comportant au moins une bande à pinces (9) entraînant une pince (7, 8) située sensiblement au-dessus de la face supérieure de la bande à pinces (9), ainsi qu'un battant (3) sur lequel sont rapportés une peigne (6) et des moyens de guidage (17, 55, 56) comportant des guides (29, 30, 31, 32, 34) destinés à guider la bande à pinces (9) associés à la face supérieure, à un flanc et à la face inférieure de la bande à pinces ainsi qu'à une nervure (53, 53') en saillie vers le bas,
    caractérisé en ce que la nervure (53, 53') s'étend au moins sur la longueur de la bande à pinces (9) susceptible d'être insérée dans un pas de chaîne (21) en étant disposée à une distance latérale par rapport aux flancs de la bande à pinces (9), les moyens de guidage (17, 55, 56) constituant, dans la partie marginale de la bande à pinces (9) opposée au battant (6), des guides (31, 32, 34) destinés à la face supérieure, au flanc et à la face inférieure de la bande à pinces, et en ce que les moyens de guidage (17, 55, 56) constituent, dans la partie dirigée vers le battant (6), des guides (29, 30) destinés à la face inférieure de la bande à pinces (9) et au flanc de la nervure (53, 53') orienté vers le battant, tandis que la face inférieure et le flanc de la nervure opposé au battant (6) ne sont pas guidés.
  2. Métier à tisser à pinces selon la revendication 1, caractérisé en ce que la nervure (53) est disposée au centre longitudinal de la bande à pinces (9).
  3. Métier à tisser à pinces selon la revendication 1 ou 2, caractérisé en ce que la bande à pinces (9) est pourvue de perçages (58, 59; 60) excentriques par rapport au centre longitudinal pour recevoir des dents d'une crémaillère d'entraînement (12, 13).
  4. Métier à tisser à pinces selon l'une des revendications 1 à 3, caractérisé en ce que la pince (7, 8) est supportée par des moyens de fixation (35) disposés en déport vers le centre longitudinal de la bande à pinces (9) en direction du battant (6).
  5. Métier à tisser à pinces selon l'une des revendications 1 à 4, caractérisé en ce que les moyens de guidage (17, 56) comportent, pour la partie marginale opposée au battant (6), un guide (31) pour la face supérieure de la bande à pinces (9) qui s'étend sur un tiers environ de la largeur de la bande à pinces (9).
  6. Métier à tisser à pinces selon l'une des revendications 1 à 5, caractérisé en ce que les moyens de guidage (17, 55) comportent, pour la partie marginale en regard du battant (6), un guide (29) pour la face inférieure de la bande à pinces (9) qui s'étend sur un tiers environ de la largeur de la bande à pinces.
  7. Métier à tisser à pinces selon l'une des revendications 1 à 6, caractérisé en ce que les guidages (29, 30, 31, 32, 34) sont répartis à au moins deux différents types de moyens de guidage (55, 56).
  8. Métier à tisser à pinces selon la revendication 7, caractérisé en ce que l'un des types de moyens de guidage (56) comporte les guides (31, 32, 34) associés au bord opposé au battant (6) de la bande à pinces (9).
  9. Métier à tisser à pinces selon l'une des revendications 1 à 8, caractérisé en ce que la nervure (53, 53') présente une hauteur correspondant sensiblement à l'épaisseur de la bande à pinces (9).
  10. Métier à tisser à pinces selon l'une des revendications 1 à 9, caractérisé en ce qu'au droit de la pince (7, 8), une nervure de guidage (28') métallique est prévue à côté de la nervure (53, 53') sur le côté opposé au battant (6).
  11. Métier à tisser à pinces selon la revendication 10, caractérisé en ce que la nervure de guidage (28') dépasse la nervure (53') vers le bas.
EP99917854A 1998-08-25 1999-03-24 Metier a tisser a pinces comportant au moins une bande a pinces et des moyens de guidage Expired - Lifetime EP1123430B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19838476 1998-08-25
DE19838476A DE19838476A1 (de) 1998-08-25 1998-08-25 Greiferbandwebmaschine mit wenigstens einem Greiferband und Führungsmitteln
BE9800781 1998-10-29
BE9800781A BE1013013A3 (nl) 1998-10-29 1998-10-29 Grijperband voor een grijperweefmachine.
PCT/EP1999/002013 WO2000011249A1 (fr) 1998-08-25 1999-03-24 Metier a tisser a pinces comportant au moins une bande a pinces et des moyens de guidage

Publications (2)

Publication Number Publication Date
EP1123430A1 EP1123430A1 (fr) 2001-08-16
EP1123430B1 true EP1123430B1 (fr) 2007-06-13

Family

ID=25663153

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99917854A Expired - Lifetime EP1123430B1 (fr) 1998-08-25 1999-03-24 Metier a tisser a pinces comportant au moins une bande a pinces et des moyens de guidage

Country Status (3)

Country Link
EP (1) EP1123430B1 (fr)
DE (1) DE59914379D1 (fr)
WO (1) WO2000011249A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE658330A (fr) * 1964-01-17 1900-01-01
IT1198246B (it) * 1986-12-23 1988-12-21 Vamatex Spa Mezzi per guidare il moto di una coppia di pinze portatrama all'interno del passo di telai di tessitura
WO1988007600A1 (fr) * 1987-04-03 1988-10-06 Textilma Ag Metier a tisser a pince
BE1004305A3 (nl) * 1989-07-06 1992-10-27 Picanol Nv Grijperweefmachine met lansgeleiding.
DE59309766D1 (de) * 1992-07-03 1999-10-14 Picanol Nv Greiferwebmaschine
DE9413172U1 (de) * 1994-08-16 1994-10-13 Textilma Ag, Hergiswil Greiferwebmaschine
IT1270681B (it) * 1994-10-27 1997-05-07 Somet Soc Mec Tessile Pista guidanastri per telai di tessitura a pinze
IT1271130B (it) * 1994-11-30 1997-05-26 Vamatex Nuova Spa Mezzi per guidare il moto di una coppia di pinze all'interno del passo di telai di tessitura
DE19713628A1 (de) * 1997-04-02 1998-10-08 Picanol Nv Greiferwebmaschine

Also Published As

Publication number Publication date
EP1123430A1 (fr) 2001-08-16
DE59914379D1 (de) 2007-07-26
WO2000011249A1 (fr) 2000-03-02

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