EP0458735A1 - Tendeur de fil de trame pour métiers à tisser à projectiles à trames multiples - Google Patents

Tendeur de fil de trame pour métiers à tisser à projectiles à trames multiples Download PDF

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Publication number
EP0458735A1
EP0458735A1 EP91810298A EP91810298A EP0458735A1 EP 0458735 A1 EP0458735 A1 EP 0458735A1 EP 91810298 A EP91810298 A EP 91810298A EP 91810298 A EP91810298 A EP 91810298A EP 0458735 A1 EP0458735 A1 EP 0458735A1
Authority
EP
European Patent Office
Prior art keywords
lever
weft
pivotable
locking member
weft thread
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Withdrawn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
EP91810298A
Other languages
German (de)
English (en)
Inventor
Oskar Hübner
Rudolf Stauner
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 EP0458735A1 publication Critical patent/EP0458735A1/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Withdrawn legal-status Critical Current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
    • D03D47/38—Weft pattern mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • B65H59/32—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
    • 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
    • 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 weft thread tensioning device for projectile weaving machines according to the preamble of claim 1 and multi-color weaving machines with such a device.
  • the weft thread is transported through the shed by means of a projectile (also known as rapier). After its flight, the projectile must be caught and then pushed back out of the safety gear against the direction of the shot. So that the weft remains stretched during this backward movement, the weft is pulled back by the length of the push-back movement using a tensioning device which is located in front of the launcher. In addition, the tensioning device must also compensate for a retraction movement of the weft thread, which takes place in the launcher when the thread is transferred to the projectile.
  • tensioning devices are common, the tensioning levers of which are pivoted transversely to the firing direction. However, devices are also known (CH-PS 332438), in which the tensioning levers are moved along the weft direction.
  • the pivoting movement of the tensioning lever takes place between two extreme positions, which are referred to as deep and high gear positions with regard to the cam (cam) causing the movement. Is in the draft position the weft is stretched, in the upright position it is deflected transversely to its direction of movement.
  • the tensioning levers are actuated with a cam which is displaceable on its drive shaft and which, thanks to the displacement mechanism, pivots each of the tensioning levers, only one of which has to be active at a time.
  • This sliding cam solution means that all weft threads are pulled back by the same length; This is often disadvantageous, as experience has shown.
  • a specific choice of up and down position of the tensioning lever proves to be advantageous. If weft yarns with different properties are processed, today's multicolor projectile weaving machines have to make do with a compromise regarding the deflection of the tensioning levers.
  • the invention now remedies this. Thanks to the design feature that the planes of movement of the cocking levers are oriented in the firing direction, the space available is more favorable with regard to the task of enabling each cocking lever to be individually assigned to the draft and draft. This object is achieved by the features of the characterizing part of claim 1. The design must of course allow the cams to be easily replaced.
  • the locking member which ensures that only one clamping lever is activated at a time, can be of various types, as characterized in claims 2 to 6, be carried out.
  • the locking member can block the clamping levers with a plate, for example with a sheet; the plate can be moved or pivoted translatively.
  • the clamping levers can also be blocked by means of a pivotable locking lever.
  • the claim 7 relates to cams or cams, which are individually adapted to the type of yarn.
  • independent claim 8 relates to multicolor weaving machines with weft tensioning devices according to the invention.
  • the tensioning device can be designed according to a modular principle in order to easily adapt the number of tensioning levers to the number of weft threads required. There is no transmission linkage between the drive and tensioning levers.
  • the weft thread tensioning device shown in FIG. 1 for a four-color projectile weaving machine comprises four tensioning levers 1, only one being drawn.
  • the cam 10 rotating according to arrow N pivots the tensioning lever 1 'from the low position (lever tip indicated by dashed lines) into the high gear position, which is shown in FIG.
  • the force of the Tension spring 2, which engages the tension lever 1, are overcome.
  • the constraining force exerted by the cam 10 designed as a cam disc on the tensioning lever 1 is transmitted via the roller 3 and roller lever 4.
  • the locking member 20 prevents the tension lever 1 from changing to the down position when it is to remain inactive and when it is released again by the cam. This blocking takes place via the buffer 5.
  • the axis 6, on which the tensioning levers 1 are supported, is only indicated by dash-dotted lines in FIG. 1; Likewise, the camshaft 11 is only hinted at.
  • the double arrow S denotes the pivoting movement of the tensioning lever 1.
  • the weft thread 7 runs from A to B through the thread guide bracket 30, which is arranged between the bobbins and thread tensioning elements (not shown) and the launcher. If the tensioning lever 1 'is in the draft position, then the thread 7' runs at least approximately in a straight line between the two eyelets 31d and 32d.
  • the thread guide bracket 30 in FIG. 1 has four pairs of eyelets for four weft threads, only the rearmost thread 7 being shown.
  • the locking member 20, as shown in Figure 1, has a pivotable locking plate 21 which has the shape of a segment of a circle with an openwork sector.
  • the locking plate 20 can be pivoted according to the double arrow R.
  • the buffer 5 of the tensioning lever 1 rests with its contact surface 25d on the locking plate 21; thus the clamping lever 1 is prevented from changing to the down position when the cam 10 continues to rotate.
  • the adjacent tensioning lever, not shown, in which the contact surface 25c of the buffer is located above the opening in the locking plate 21, can go into the draft position.
  • the other two tension levers, also not shown, with the contact surfaces 25a and 25b are also blocked by the locking plate 21 in the high gear position.
  • a locking member 200 which can release the pivoting movement (double arrow S ') of the tensioning lever 1, which is only shown in part in the area of the buffer 5, with a pivotable locking lever 201.
  • the locking lever 201 can, for example, be pivoted electromechanically by means of a lifting magnet 202 and a tab 203 with which the lifting movement (double arrow H) is transmitted.
  • the locking lever 201 'in the upper position is limited by the stop 204 in its movement; the stop 205 ensures the lower limitation.
  • a pneumatic lifting cylinder can also be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP91810298A 1990-05-21 1991-04-23 Tendeur de fil de trame pour métiers à tisser à projectiles à trames multiples Withdrawn EP0458735A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1723/90 1990-05-21
CH172390 1990-05-21

Publications (1)

Publication Number Publication Date
EP0458735A1 true EP0458735A1 (fr) 1991-11-27

Family

ID=4217100

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810298A Withdrawn EP0458735A1 (fr) 1990-05-21 1991-04-23 Tendeur de fil de trame pour métiers à tisser à projectiles à trames multiples

Country Status (1)

Country Link
EP (1) EP0458735A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007039242A2 (fr) * 2005-10-01 2007-04-12 Sultex Ag Metier a tisser a projectile
CN105274712A (zh) * 2015-10-28 2016-01-27 必佳乐（苏州工业园区）纺织机械有限公司 一种剑杆织机纬纱选择装置
CN106435964A (zh) * 2016-11-29 2017-02-22 江苏悦达家纺有限公司 一种可调节纬纱张力的储纬器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH332438A (de) * 1953-10-17 1958-09-15 Sulzer Ag Webmaschine
FR1260397A (fr) * 1960-06-20 1961-05-05 Sulzer Ag Procédé et dispositif pour tendre la matière de trame à insérer dans la foule
EP0031853A1 (fr) * 1979-12-27 1981-07-15 GebràœDer Sulzer Aktiengesellschaft Métier à tisser à chasses multiples
EP0090878A1 (fr) * 1982-04-07 1983-10-12 GebràœDer Sulzer Aktiengesellschaft Dispositif de tension de la trame pour métiers à tisser, plus particulièrement pour les métiers à projectiles
EP0241075A2 (fr) * 1986-04-03 1987-10-14 Picanol N.V. Mécanisme d'entraînement et de commande pour le pinçage, la présentation et l'accrochement de fils de trame dans les métiers à griffes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH332438A (de) * 1953-10-17 1958-09-15 Sulzer Ag Webmaschine
FR1260397A (fr) * 1960-06-20 1961-05-05 Sulzer Ag Procédé et dispositif pour tendre la matière de trame à insérer dans la foule
EP0031853A1 (fr) * 1979-12-27 1981-07-15 GebràœDer Sulzer Aktiengesellschaft Métier à tisser à chasses multiples
EP0090878A1 (fr) * 1982-04-07 1983-10-12 GebràœDer Sulzer Aktiengesellschaft Dispositif de tension de la trame pour métiers à tisser, plus particulièrement pour les métiers à projectiles
EP0241075A2 (fr) * 1986-04-03 1987-10-14 Picanol N.V. Mécanisme d'entraînement et de commande pour le pinçage, la présentation et l'accrochement de fils de trame dans les métiers à griffes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007039242A2 (fr) * 2005-10-01 2007-04-12 Sultex Ag Metier a tisser a projectile
WO2007039242A3 (fr) * 2005-10-01 2007-10-18 Markus Farner Metier a tisser a projectile
CN105274712A (zh) * 2015-10-28 2016-01-27 必佳乐（苏州工业园区）纺织机械有限公司 一种剑杆织机纬纱选择装置
CN106435964A (zh) * 2016-11-29 2017-02-22 江苏悦达家纺有限公司 一种可调节纬纱张力的储纬器

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