EP0985063B1 - Dispositif pour tendre les fils de chaine dans un metier mecanique - Google Patents

Dispositif pour tendre les fils de chaine dans un metier mecanique Download PDF

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Publication number
EP0985063B1
EP0985063B1 EP98930721A EP98930721A EP0985063B1 EP 0985063 B1 EP0985063 B1 EP 0985063B1 EP 98930721 A EP98930721 A EP 98930721A EP 98930721 A EP98930721 A EP 98930721A EP 0985063 B1 EP0985063 B1 EP 0985063B1
Authority
EP
European Patent Office
Prior art keywords
torsion spring
bearing
support
support beam
warp 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
EP98930721A
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German (de)
English (en)
Other versions
EP0985063A1 (fr
Inventor
Bart Lefever
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
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Filing date
Publication date
Application filed by Picanol NV filed Critical Picanol NV
Publication of EP0985063A1 publication Critical patent/EP0985063A1/fr
Application granted granted Critical
Publication of EP0985063B1 publication Critical patent/EP0985063B1/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
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/12—Controlling warp tension by means other than let-off mechanisms

Definitions

  • the invention relates to a device for tensioning warp threads in a weaving machine with a rotatably mounted support tree, the at a distance from its axis of rotation on a clamping element acts on the warp threads and preferably with one preloadable torsion spring is loaded.
  • a device of the type mentioned is from the US patent 4,534,386.
  • the US patent discloses that the Warp tension determined via the angular position of the support beam and if necessary to regulate or control the warp let-off speed can be used. Because the angular position of the support beam does not depend solely on the warp tension the determination of the warp tension is relatively imprecise.
  • the invention has for its object a device of the type mentioned in such a way that the warp tension can be grasped precisely, especially for setting the warp tension and / or for regulating or controlling the warp let-off speed depending on the warp tension, without that there is a risk of damage to the warp threads.
  • This object is achieved in that means for detection the torsional moments of the torsion spring are provided.
  • the invention has the advantage that the torsional moments the torsion spring the warp tension in a simple and precise manner can be detected.
  • This embodiment has the advantage that torsional moments can be detected which essentially correspond to the moments, which the warp threads exert on the supporting beam via the tensioning element.
  • the torsional moment of the torsion spring differs from this moment brought up by the warp threads only through the moment that the bearing friction between the support tree and torsion spring causes.
  • this is Low friction, as there is practically no bending moment in the bearing is initiated.
  • the friction is within of the bearing is small, since the support tree and the torsion spring rotate relative to each other during weaving so that the friction a so-called dynamic friction within the bearing which is therefore relatively low.
  • the bearing is mounted in the support tree, while the facility is arranged around the support tree and is in a radial plane that is in the range of the camp runs perpendicular to the axis of the support tree.
  • the bearing preferably has a small diameter. This has the advantage that the bearing's frictional forces due to the small diameter only a small moment on the torsion spring can exercise so that the detected, within the Torsion spring existing torsional moment practically equal to that The moment is that the warp threads exert on the support tree.
  • the bearing consists of a needle bearing.
  • a needle bearing has only one low friction. Because the support tree and the torsion spring turning relative to each other during weaving is The risk is relatively low that such a needle bearing Wear is subject.
  • the device is a contains torsionally rigidly connected element, that by means of an adjusting element to a transmission element is articulated, which abuts a stationary stop.
  • the torsion spring of several non-rotatably connected, axially to each other Slidable sections is composed, which is preferably optionally rotatably connected to the support boom are.
  • This torsion spring composed of parts offers the advantage that no axial torsional Forces arise. In addition, by selecting the parts connected to the supporting tree have the spring stiffness to get voted.
  • a support beam 2 is arranged between the support arms 1, that runs across the width of the loom.
  • the Support arms 1 and the support beam 2 are by means of fastening parts 3 connected to each other.
  • On the support beam 2 is in a holder 4 is fastened in the vicinity of the respective support arm 1, in which in each case a support beam 5 is provided by means of a bearing 6 is rotatably mounted, which consists of a tube.
  • holder 7, which are rotatably mounted Rollers 8, 9 are provided to the Support tree 5 .
  • the rollers 8, 9 form bearings for a tension roller 10, over which warp threads 15 run.
  • Additional supports 17 are attached to the support beam 2, in which the support tree 5 is additionally supported by means of a bearing and is supported.
  • Within the support tree 5 is one Torsion spring 16 arranged by means of the support tree 5 the Tension roller 10 presses against the warp threads 15.
  • the embodiment is the supporting tree according to the US patent 4 534 386 by means of several supports on the weaving machine frame held.
  • the torsion spring 16 consists of a coupling piece 18 and a plurality of sections 19 which are connected to one another in a rotationally fixed manner, but are axially displaceable.
  • the coupling piece 18 and the sections 19 are each with couplings 52 Hexagon socket and hexagon connected so that the individual elements rotatably, but axially displaceable with each other are coupled.
  • the individual elements are relative axially displaceable relative to each other, so that no axial tensions are transmitted due to torsion of each Elements arise.
  • For adjusting the rigidity of the torsion spring 16 is optionally one end of one of the sections 19 by means of a screw 46 rotatably with the support tree 5 connectable. Depending on the section, the non-rotatable is connected to the support tree 5, the effective length of the Torsion spring 16 determines, so that the rigidity of the Torsion spring 16 is adjustable or adaptable.
  • the pulley has a journal at each end 12 with a bearing 13. This bearing 13 is in one Slot 14 of the brackets 4 slidably so that the pulley 11 for example when changing a warp beam in a higher position can be brought.
  • the warp threads 15 run over the deflection roller 11 and the tension roller 10.
  • the coupling piece 18 of the torsion spring 16 by means of a bearing 20 in the end of the support tree 5 stored.
  • a force transmitter 21 is arranged in the area of the bearing 20.
  • the parts of a facility 22 arranged with which the torsion spring 16 is connected is and which cooperate with the power generator 21 to the Measure force with which the torsion spring 16 on the force transducer 21 acts.
  • the parts of the device 22 are around Support tree 5 arranged around and act on the force transmitter 21st on.
  • the force generator 21 and the bearing 20 arranged in a common radial plane 23, which runs perpendicular to the axis 26 of the support tree 5.
  • the bearing 20 is also in the vicinity of the bearing 6 arranged for the support tree 5 of the holder 4.
  • the force giver 21 is by means of the support beam 2 on the loom frame attached so that the power transmitter 21 and to the power transmitter 21 leading electrical cables can be permanently installed.
  • the force transmitter 21 has a holder 30, in which as Measuring elements, for example measuring strips 31, are glued in, which in a known manner by means of electrical lines with a Measuring bridge are connected.
  • the measuring bridge is not closer to shown way with a control unit of the loom connected so that, for example, the Kettablaßmotor in Controlled or regulated depending on the detected warp tension can be.
  • the holder 30 is attached to the support beam 2.
  • the holder 30 is on the support arm 1 attached.
  • the holder 30 is with one in the Radial plane 23 provided support member 24 which the Scope of the support tree 5 is opposite.
  • the support element 24 works with a stop 25, which is part of the Device 22 is, which will be described in more detail.
  • the Support element 24 is attached to the holder by means of a screw 49 30 attached.
  • the stop 25 comes to a precisely defined Place in contact with the support member 24 so that the torsional moment the torsion spring 16 from the measured force F (Fig. 4) can be determined.
  • the stop surface of the support element 24 is partially cylindrical, while the stop 25 is a for this purpose has a tangential, flat stop surface 54 which in a tangential plane 56, which is through the axis 26 of the Torsion spring 16 extends. This way, a contact line obtained between the support member 24 and the stop 25.
  • the torsional moment corresponds to the product of the measured Force F and the distance D from the axis 26 of the support tree 5 to the contact line between the stop 25 and the support element 24th
  • the device 22 contains an element 32 which is rotationally fixed the coupling piece 18 and thus also non-rotatably with the torsion spring 16 is connected.
  • the element 32 has a hexagon socket 33, which is plugged onto an external hexagon 34 is provided on the coupling piece 18 of the torsion spring 16 is.
  • the device 22 further includes a transmission element 27, which is rotatably mounted with respect to the element 32 is.
  • the transmission element 27 is with an annular collar 29 provided with little play in a bore 28 of the Element 32 is arranged.
  • the transmission element 27 additionally rotatable by means of a bore 53 mounted on the coupling piece 18 of the torsion spring 16.
  • the Stop 25 which cooperates with the support member 24 Part of the transmission element 27.
  • setting means 35 To the angular position between the transmission element 27 and to set the element 32, setting means 35 are provided. These adjusting means 35 contain a clamping screw 36, which is screwed into a thread 37 of an insert 38, which is rotatably arranged on the element 32.
  • the tension screw 36 penetrates a bore 39 of an insert 40, which is rotatably attached to the transmission element 27.
  • the Transmission element 27 and element 32 can by means of a Screw 45 are fixed to one another in a rotationally fixed manner.
  • the Screw 45 penetrates a slot 44 of the transmission element 27 and is screwed into a thread of the element 32.
  • the respective position of the transmission element 27 and the element 32 can thus be adjusted by the Tension screw 36 is rotated in the thread 37 as long as the Screw 45 is not tightened. 6 are the transmission element 27 and the element 32 in comparison to FIG. 5 set in a different position.
  • the warp threads 15 exert a force on the Tension pulley 10, the support beam 5 with a torque applied.
  • the torsional moment counteracts this torque, that exerts the torsion spring 16 on the support tree 5.
  • the supporting tree 5 Due to the changing warp thread tension during weaving the supporting tree 5 is thus rotated back and forth, so that the sections 19 of the torsion spring 16 accordingly be twisted.
  • Torsion spring 16 are adjusted and / or preloaded that the tension roller 10 at a medium warp tension takes the desired position.
  • the rigidity of the torsion spring 16 can be adjusted in that the length of the actually working part of the torsion spring 16 selected as already explained above.
  • the torsion spring 16 When weaving with low warp tensions, is a Biasing the torsion spring 16 is not necessary, but possibly just one setting. To when changing a warp beam as few settings as possible on the weaving machine To make it, it is advantageous if the torsion spring 16 can be pre-tensioned without warp threads 15.
  • This is a second stop 41 is provided, which with one on the Support tree 5 attached stop 43 cooperates.
  • the two Stops 41 and 43 are in the axial direction A of the support tree 5 in the area of the radial plane of the bearing 20 and the force sensor 21 arranged.
  • the stop 41 is attached to the transmission element 27.
  • the stop stops 43 of the support tree 5 to the stop 41 so that the support tree 5 rotated with the device 22 via a path in the bearings 6 can be limited by means of a stop 42 is.
  • the stop 42 attached to the transmission element 27 is, for example, cooperates with the holder 30. However, it can also be used with any other element of the Loom frame work together.
  • the stop 25 is released from the support part 24, so that the force generator 21 is unloaded. This can even with a preloaded torsion spring 16, the zero setting of the force generator 21 are determined.
  • the stop 25 of the Transfer part 27 again to the support member 24, wherein the stop 42 detaches from the holder 30. If the torque is greater than the torsional moment of the (possibly preloaded) Torsion spring 16, the stop 43 releases from the Stop 41, so that the position shown in FIG. 4 is again assumed becomes. To avoid that the torsion spring 16 is overloaded the stop 43 can also cooperate with the stop 25. With a view to proper functioning the tensioning roller 10 during weaving must be selected in this way be that when weaving the stop 43 always from that Stop 41 is released, i.e. it must not be chosen too high become. But it must be sufficiently large that the stop 43 of the support tree 5 when weaving with the stop 25 of the Transmission element 27 comes into contact.
  • the bearing 20 accommodated in the supporting tree 5 has a small one Diameter on. As can be seen from Fig. 4, there is this bearing 20 from a needle bearing with cylindrical needles 50, which are arranged in a bearing ring 51. The bearing ring 51 is pressed into the support tree 5. The needles 50 run on the coupling piece 18 of the torsion spring 16. Bei a modified embodiment is used as a bearing 20 slide bearing lubricated by means of a lubrication system.
  • torsion spring 16 touches the inside of the support tree 5. Since the section 19 of the torsion spring 16 within the support tree 5 in the area the screw 46 does not rotate, this section 19 on this Place the support tree 5 touch.
  • Torque would generate that along with the torsional moment the torsion spring 16 which from the warp threads 15 to the Support tree 5 would counteract the torque exerted.
  • the torsion spring 16 is mounted by means of the bearing 20 and since the force F on the support element 24 has no bending moment caused in the torsion spring 16 is the torsion spring between the screw 46 with which it is fastened to the supporting tree 5 and does not subject the bearing 20 to deflection, so that it can not rub against the support tree 5.
  • the transmission element 27 and the element 32 interlock and in addition the transmission element 27 on the coupling piece 18 is stored, it is still possible that due to of tolerances between the transmission element 27 and the element 32 and / or between the transmission element 27 and the coupling piece 18 to a limited bending moment the torsion spring 16 could be exercised.
  • This bending moment can, however, be easily caught by the bearing 20 be designed as needle bearings or plain bearings is. This prevents a bending moment in the Torsion spring 16 between the bearing 20 and the screw 46 occurs so that the torsion spring 16 does not sag and thus does not touch the inner diameter of the support tree 5.
  • the stop 25 does not have to be exactly in the middle of the bearing 20 may be arranged. It is sufficient if the Force F that the stop 25 on the support member 24 of the Force generator 21 exerts in a radial plane of the bearing 20th lies. In the case of a needle bearing, this means that this force F in the area of the radial planes through the needles 50 of the bearing 20 should be. In this case, the force F no bending moment causes. With regard to internal tensions within the bearing 20 and for wear dependent thereon it is advantageous if the force F is centered on the needles 50 is directed. The same applies to the stops 41 and 43rd
  • a support 47 is attached, with a Bolt 48 is provided, which is opposite the element 32 and prevents the element 32 with the coupling piece 18th disengaged. Because the force F, which is on the encoder 21 is detected, depends only on the tension of the warp threads 15, can the power generator 21 in a simple manner depending calibrated from this detected tension of the warp threads 15 become.
  • the embodiment according to FIG. 8 corresponds in principle Structure of the embodiment described above. However, it differs in the design of the force generator 21 '.
  • the coupling piece is used 18 of the torsion spring as a force generator 21 '.
  • This is the coupling piece 18 provided with bonded strain gauges 55, which are installed in a measuring bridge, not shown. In the area of the strain gauges 55 is in the transmission element 27 a recess 57 is provided.
  • the torsion spring 16 outgoing torsional moment is therefore called deformation of the coupling piece 18 in the area of its outer surface and not as a deformation of the holder 30.
  • the strain gauges 55 are in the illustrated embodiment near the bearing 20 on the coupling piece 18 attached, between the bearing 20 and the bore 53 of the transmission element 27 with which this transmission element 27 is mounted on the coupling piece 18.
  • the force transmitter 21 or 21 'of course does not have to be a force measurement using a strain gauge.
  • Embodiments are, for example, piezoelectric Measuring elements are provided which generate a voltage, the force F acting on the relevant measuring elements equivalent.
  • the support tree 5 is on the support tree 5 no tension roller 10 arranged.
  • the support tree 5 is in this Embodiment for example provided with a cam, which acts on a support element mounted in a frame, on which a tension roller 10 is attached.
  • a cam acts on a support element mounted in a frame, on which a tension roller 10 is attached.
  • Such Construction is for example from EP-A 694 638 or the U.S. Patent 5,562,128 is known, such as reference numerals 28, 29, 19 and 21 each show in Fig. 1 of these references.
  • the Supporting tree to be provided with a crank, which has a crank rod with a support element mounted in a frame interacts, on which, for example, a tensioning roller is mounted.
  • the torsion spring 16 is arranged on the inside acts on the tensioning pulley 10 via the supporting tree 5.
  • the Tension pulley 10 is generated by the torsion spring 16 Force F and the resulting torque against the Warp threads 15 pressed.

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

Claims (12)

  1. Dispositif pour tendre des fils de chaíne (15) dans un métier à tisser avec un arbre de support (5) logée d'une manière tournante qui, à un écart relativement à son axe de rotation (26), agit sur un élément tendeur (10) des fils de chaíne (15) et qui est chargée par un ressort à torsion (16) pouvant de préférence être précontraint, caractérisé en ce que sont prévus des moyens (21, 21') pour détecter les couples de torsion du ressort à torsion (16).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'extrémité du ressort à torsion (16, 18) disposé à l'intérieur de l'arbre de support (5) est logée au moyen d'un palier (20) dans l'arbre de support (5) et est reliée à une installation (22) à laquelle sont associés, sensiblement dans le plan radial du palier (20), une butée stationnaire (24) et des moyens (21, 21') pour détecter les couples de torsion du ressort à torsion (16).
  3. Dispositif selon la revendication 2, caractérisé en ce que l'installation (22) est disposée autour de l'arbre de support (5) et se trouvé essentiellement dans un plan radial qui s'étend au voisinage du palier (20) perpendiculairement à l'axe de l'arbre de support (5).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que l'installation (22) comprend un élément (32) relié d'une manière non tournante au ressort à torsion (16) qui est articulé au moyen d'un élément d'ajustage (35) à un élément de transmission (27) qui s'applique à la butée stationnaire (24).
  5. Dispositif selon la revendication 4, caractérisé en ce que la butée stationnaire (24) se situe au moins approximativement dans le plan radial (23) du palier (20) au moyen duquel le ressort à torsion (16) est logé dans l'arbre de support (5).
  6. Dispositif selon la revendication 4 ou 5, caractérisé en ce qu'un générateur de force (21) est intégré dans la butée stationnaire (24) ou dans son support (30).
  7. Dispositif selon la revendication 4 ou 5, caractérisé en ce que le ressort à torsion (16) est relié à l'élément (32) de l'installation (22) au moyen d'une pièce d'accouplement (18) dans laquelle est intégré un générateur de force (21').
  8. Dispositif selon l'une des revendications 2 à 7, caractérisé en ce que l'élément de transmission (27) de l'installation (22) est logé d'une manière tournante concentriquement à l'axe (26) du ressort à torsion (16).
  9. Dispositif selon l'une des revendications 2 à 8, caractérisé en ce que le mouvement de rotation de l'arbre de torsion (5) en direction des fils de chaíne (15) est limité au moyen de butées (41, 43).
  10. Dispositif selon la revendication 9, caractérisé en ce que les butées (41, 43) sont disposées au moins approximativement dans le plan radial (23) du palier (20) du ressort à torsion (16).
  11. Dispositif selon l'une des revendications 1 à 10, caractérisé en ce que le palier (20) pour le ressort à torsion (16, 18) est un palier à aiguilles.
  12. Dispositif selon l'une des revendications 1 à 11, caractérisé en ce que le ressort à torsion (16) est constitué de plusieurs pièces partielles (19) reliées d'une manière immobile en rotation les unes aux autres, déplaçables axialement les unes aux autres, qui peuvent être reliées de préférence sélectivement d'une manière immobile en rotation à l'arbre de support (5).
EP98930721A 1997-05-28 1998-05-22 Dispositif pour tendre les fils de chaine dans un metier mecanique Expired - Lifetime EP0985063B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9700466 1997-05-28
BE9700466A BE1011184A3 (nl) 1997-05-28 1997-05-28 Inrichting voor het bepalen van de kettingspanning.
PCT/EP1998/003036 WO1998054386A1 (fr) 1997-05-28 1998-05-22 Dispositif pour tendre les fils de chaine dans un metier mecanique

Publications (2)

Publication Number Publication Date
EP0985063A1 EP0985063A1 (fr) 2000-03-15
EP0985063B1 true EP0985063B1 (fr) 2002-06-26

Family

ID=3890543

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98930721A Expired - Lifetime EP0985063B1 (fr) 1997-05-28 1998-05-22 Dispositif pour tendre les fils de chaine dans un metier mecanique

Country Status (5)

Country Link
US (1) US6230757B1 (fr)
EP (1) EP0985063B1 (fr)
BE (1) BE1011184A3 (fr)
DE (1) DE59804594D1 (fr)
WO (1) WO1998054386A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4973142B2 (ja) * 2006-11-17 2012-07-11 株式会社豊田自動織機 パイル織り織機における経糸張力制御装置
CN108179529B (zh) * 2018-03-06 2023-12-08 沈红 恒张力送经缂丝机

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS190998B1 (en) * 1977-09-07 1979-06-29 Otto Rotrekl Back rail mechanism for weaving looms
CH623873A5 (fr) * 1977-12-02 1981-06-30 Sulzer Ag
DE3273224D1 (en) * 1982-10-26 1986-10-16 Sulzer Ag Warp tensioning device on a weaving loom
IT1207056B (it) * 1985-05-31 1989-05-17 Vamatex Spa Dispositivo svolgitore di subbi d'ordito gemelli in telai di tessitura.
BE1002819A3 (nl) * 1989-02-06 1991-06-18 Picanol Nv Werkwijze voor het weven van een weefsel met een weefselpatroon, en weefmachines die deze werkwijze toepassen.
CH681156A5 (fr) * 1989-05-02 1993-01-29 Sulzer Ag
BE1005707A3 (nl) * 1992-02-27 1993-12-21 Picanol Nv Inrichting voor het bevestigen van een onderdeel aan een freem bij een weefmachine.
EP0562214A1 (fr) * 1992-03-27 1993-09-29 Sulzer RàœTi Ag Métier à tisser avec des ensouples sectionnelles
DE4427129C2 (de) * 1994-07-30 1998-07-30 Dornier Gmbh Lindauer Spanneinheit für die Webkette einer Webmaschine
DE19538121C1 (de) * 1995-10-13 1997-02-27 Dornier Gmbh Lindauer Ungesteuerte Spanneinheit für die Webkette einer Webmaschine
WO1997030201A1 (fr) * 1996-02-17 1997-08-21 Picanol N.V. Dispositif pour tendre une nappe de fils de chaine dans un metier mecanique

Also Published As

Publication number Publication date
DE59804594D1 (de) 2002-08-01
EP0985063A1 (fr) 2000-03-15
WO1998054386A1 (fr) 1998-12-03
US6230757B1 (en) 2001-05-15
BE1011184A3 (nl) 1999-06-01

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