EP4101965B1 - Frein de fils - Google Patents

Frein de fils Download PDF

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Publication number
EP4101965B1
EP4101965B1 EP21178971.4A EP21178971A EP4101965B1 EP 4101965 B1 EP4101965 B1 EP 4101965B1 EP 21178971 A EP21178971 A EP 21178971A EP 4101965 B1 EP4101965 B1 EP 4101965B1
Authority
EP
European Patent Office
Prior art keywords
carrier
eyelet
disc
brake according
yarn brake
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.)
Active
Application number
EP21178971.4A
Other languages
German (de)
English (en)
Other versions
EP4101965A1 (fr
Inventor
Frank Stockenhofen
Ferdinand Stender
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.)
Karl Mayer Stoll R&D GmbH
Original Assignee
Karl Mayer Stoll R&D 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 Karl Mayer Stoll R&D GmbH filed Critical Karl Mayer Stoll R&D GmbH
Priority to EP21178971.4A priority Critical patent/EP4101965B1/fr
Priority to CN202210256762.2A priority patent/CN115467079B/zh
Publication of EP4101965A1 publication Critical patent/EP4101965A1/fr
Application granted granted Critical
Publication of EP4101965B1 publication Critical patent/EP4101965B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/10—Devices for supplying, feeding, or guiding threads to needles
    • D04B27/12—Tensioning devices for individual threads
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/44—Tensioning devices for individual threads

Definitions

  • the present invention relates to a thread brake with a first disc, a second disc, a disc carrier and a tensioning device which applies a force to the first disc in the direction of the second disc, wherein the first disc and the second disc are mounted on an eyelet carrier which has a thread guide eyelet through which a thread path runs.
  • DE 35 24 151 A1 shows a thread brake for textile machines with a first disc, a second disc, a disc carrier and a tensioning device which applies a force to the first disc in the direction of the second disc.
  • the two discs are arranged on a bolt which carries a thread holder, which in turn has a through hole through which a thread path runs.
  • a similar thread brake is in the EP 3 753 887 A1 shown, with the thread path running through a through hole in the bolt.
  • US 5 343 983 A shows another thread brake.
  • two disks are provided which are pressed against each other by a tensioning device and which are arranged on a bolt. Outside the disks, thread guide eyes are provided through which a thread path runs.
  • the disks are mounted on their outer circumference in a holder and a thread can be guided through an opening in a disk into the space between the two disks.
  • the invention relates to a thread brake for use in a warp knitting machine and a warp knitting machine with such a thread brake.
  • the thread brake is used, for example, when the threads have to be unwound individually from spools in a creel. Each thread is acted upon by such a thread brake.
  • the thread brakes generate a certain braking force on the thread and thus put it under tension.
  • disc brakes are known from the area of warp preparation, especially warping. These generate the braking force by guiding the thread between two discs.
  • the known disc brakes are comparatively expensive and are therefore not used for warp knitting machines.
  • the invention is based on the object of designing a thread brake cost-effectively.
  • the thread is guided through the thread guide eyelet, which defines a thread path.
  • This thread path now runs between the first disc and the second disc, which are mounted on the eyelet carrier.
  • the eyelet carrier therefore fulfils two functions, namely supporting the first disc and the second disc and guiding the thread. This means that only a few components are required, namely the disc carrier, the two discs, the tensioning device and the eyelet carrier. These parts can be manufactured and assembled inexpensively.
  • the tensioning device then generates the braking force via the eyelet carrier.
  • the projection acts on the first disc in the circumferential direction around the eyelet carrier at at least two positions. This prevents the disc from tipping relative to the eyelet carrier.
  • the projection preferably acts on the first disc over a large area or at more than two positions.
  • the projection has a recess on its side facing the first disc.
  • the recess facilitates handling, i.e. an operator can easily lift the eyelet carrier from the first disc, which is helpful, for example, for inserting a thread through the thread guide eyelet.
  • the eyelet carrier is inserted into the disc carrier. This ensures that the eyelet carrier is reliably held to the disc carrier.
  • the eyelet carrier is held in the disc carrier in a twist-proof manner when inserted. This results in a defined direction for the thread path that cannot be changed during operation.
  • the eyelet carrier can be inserted into the disc carrier in at least two positions. This allows the direction of the thread path to be adjusted. As soon as the eyelet carrier is inserted into the disc carrier, the angular position it assumes is defined.
  • the thread guide eyelet is made of a ceramic material.
  • a ceramic material is sufficiently resistant not to be damaged by a thread running through it. This reliably prevents the thread from shrinking.
  • the thread guide eyelet is mounted as an insert in the eyelet carrier. This means that it can be easily replaced without incurring major costs.
  • the eyelet carrier is preferably designed as an injection-molded part.
  • the eyelet carrier can therefore also be produced cost-effectively.
  • the eyelet carrier can be made of a ceramic material.
  • the thread guide eyelet is preferably connected in one piece to the eyelet carrier.
  • the tensioning device has a variable tensioning force.
  • the tensioning force By changing the tensioning force, the braking effect on the thread running through the thread guide eyelet can be changed.
  • the tensioning device comprises a tensioning element which is arranged between the eyelet carrier and a holding element, wherein the
  • the disc carrier has several positions at which the holding element can be fixed.
  • the position at which the holding element is fixed determines the stretch of the tensioning element and thus the force with which the tensioning element acts on the eyelet carrier. This force, in turn, is decisive for the braking force that the two discs exert on the thread.
  • the tensioning element is preferably designed as an elastomeric tension element or as a spiral spring.
  • the elastomeric tension element can be made of rubber or another elastomeric material, for example.
  • the spiral spring can be made of metal or plastic.
  • the disk carrier has a plurality of grooves which run transversely to a clamping direction of the clamping element and in which the holding element can be fixed. The grooves then form the position at which the holding element can be fixed.
  • Fig. 1 shows in an exploded view a thread brake 1 with a disc carrier 2, an eyelet carrier 3 into which a thread guide eyelet 4 is inserted, a first disc 5, a second disc 6, a clamping element 7 and a holding element 8.
  • the eyelet carrier 3 with the thread guide eyelet 4 located therein is guided through the first disk 5 and the second disk 6 and inserted into a recess 9 on the disk carrier 2.
  • the eyelet carrier 3 has a polygonal cross-section 10.
  • the recess 9 also has a similar polygonal cross-section.
  • the eyelet carrier 3 is therefore secured against twisting when it is inserted into the recess 9 of the disk carrier 2. However, it can be inserted into the disk carrier 2 in two angular positions offset by 90° to one another.
  • the tensioning element 7 engages a holding position 11 on the eyelet carrier 3.
  • the tensioning element 7 is connected to the holding element 8.
  • the disc carrier 2 has several grooves 12 on one side in which the holding element 8 can be fixed.
  • the holding element 8 is designed as a rectangular ring, so that the holding element 8 can always be arranged in two parallel grooves.
  • the tensioning element 7 is made of an elastomeric material, for example a rubber. In other words, it can be designed as a rubber band. Alternatively, as in Fig. 2 can be seen, can also be designed as a spring, in particular as a spiral spring.
  • the clamping force generated by the clamping element 7 depends on its elongation.
  • the elongation is defined by the position at which the holding element 8 is attached to the disk carrier 2.
  • the holding element 8 If the holding element 8 is positioned further away from the eyelet carrier 3, the clamping force generated by the clamping element 7 increases. If the holding element 8 is positioned closer to the eyelet carrier 3, a correspondingly lower clamping force and thus a correspondingly lower braking force is generated.
  • the eyelet carrier 3 When assembled, the eyelet carrier 3 is inserted into the recess 9 of the disc carrier 2 and thus holds the two discs 5, 6 in position between itself and the disc carrier 2.
  • the eyelet carrier 3 has a projection 13 running around the circumference, which acts on the first disc 5.
  • the eyelet carrier 3 can thus enable a force to be applied over a large area and at the same time largely prevent the first disc 5 from tipping over relative to the second disc 6.
  • the projection 13 has a recess 14, which serves as an ergonomic aid so that an operator can grasp the eyelet carrier 3, even if the projection 13 lies flat on the first disc 5.
  • the thread brake 1 When the holding element 8 has been fixed in a desired position on the disc carrier 2, the thread brake 1 generates the desired tensioning force.
  • the eyelet carrier 3 can be raised against the force of the tensioning element 7 so that a gap can be formed between the first disk 5 and the second disk 6 through which a thread can be introduced into the thread guide eyelet 4. Since no further thread guide eyelets 4 are required, the effort for the thread brake 1 is kept small.
  • a first modification of the thread brake 1 is that the disk carrier 2 has two positions at each of which a thread 15, 16 can be subjected to a braking force. Another difference is that the eyelet carrier 3 is no longer arranged perpendicular to the longitudinal direction of the disk carrier 2, but rather approximately parallel to the longitudinal direction of the disk carrier 2. In addition, the grooves 12 are no longer arranged on an outer side of the disk carrier 2, but in a slot 17 in a wall 18 of the disk carrier 2.
  • the two braking positions for threads 15, 16 correspond to each other. For this reason, only the braking position for thread 15 (in the drawing on the left side of the thread brake) is described.
  • both the eyelet carrier 3 and the first disk 5 are made of a ceramic material.
  • the tensioning element 7 is designed here as a spring, in particular as a spiral spring.
  • the tensioning element 7 has an eyelet 19 into which the holding projection 11 of the eyelet carrier 3 can be hooked. It should be noted that the tensioning element 7 has a length that is somewhat shorter than the distance between the holding element 8 and the eyelet carrier 3 in the most retracted position on the disc carrier 2, so that the tensioning element 7 can always exert a small tension on the eyelet carrier 3.
  • the thread brake requires only five components for each thread.
  • the eyelet carrier 3 can only be inserted into the disc carrier 2 in one or a few angular positions. This can also be used to move the eyelet carrier 3 into an "insertion position" after it has been pulled out by slightly twisting it relative to the disc carrier 2. This in turn makes it easier to pull in a thread 15 without additional tools and speeds up the pulling in or threading process considerably.
  • the eyelet carrier 3 and the disc carrier 2 can be cost-effectively manufactured as injection-molded elements.
  • the disc carrier 2 can also have a fastening geometry 20 with which the thread brake 1 can be mounted in a frame.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Braking Arrangements (AREA)

Claims (14)

  1. Frein de fils (1) avec une première rondelle (5) et une deuxième rondelle (6), un porte-rondelles (2) et un système de serrage, qui applique une force sur la première rondelle (5) en direction de la deuxième rondelle (6), sachant que la première rondelle (5) et la deuxième rondelle (6) sont disposées sur un porteœillet (3), qui comporte un œillet guide-fil (4) à travers lequel passe un chemin de fil, sachant que le système de serrage agit avec une tension de traction sur le porte-œillet (3),
    caractérisé en ce que
    les deux rondelles (5, 6) sont disposées entre le porte-rondelles (2) et une saillie (13) sur le porte-œillet (3) .
  2. Frein de fils selon la revendication 1, caractérisé en ce que la saillie (13) agit sur la première rondelle (5) en direction périphérique autour du porte-œillet (3) dans au moins deux positions.
  3. Frein de fils selon la revendication 2, caractérisé en ce que la saillie (13) comporte un évidement (14) sur son côté tourné vers la première rondelle (5).
  4. Frein de fils selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le porte-œillet (3) est emboîté dans le porte-rondelles (2).
  5. Frein de fils selon la revendication 4, caractérisé en ce qu' à l'état emboîté, le porte-œillet (3) est maintenu bloqué en rotation dans le porte-rondelles (2).
  6. Frein de fils selon la revendication 5, caractérisé en ce que le porte-œillet (3) peut être inséré dans au moins deux positions angulaires dans le porte-rondelles (2) .
  7. Frein de fils selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'œillet guide-fil (4) est formé d'un matériau céramique.
  8. Frein de fils selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'œillet guide-fil (4) est monté dans le porte-œillet (3) en tant qu'élément d'insertion.
  9. Frein de fils selon la revendication 6 ou 7, caractérisé en ce que le porte-œillet (3) est constitué sous la forme d'une pièce moulée par injection.
  10. Frein de fils selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le porte-œillet (3) est formé d'un matériau céramique.
  11. Frein de fils selon l'une quelconque des revendications 1 à 10, caractérisé en ce que le système de serrage comporte une force de serrage modifiable.
  12. Frein de fils selon la revendication 11, caractérisé en ce que le système de serrage comporte un élément de serrage (7), qui est disposé entre le porte-œillet (3) et un élément de maintien (8), sachant que le porte-rondelles (2) comporte plusieurs positions sur lesquelles l'élément de maintien (8) peut être fixé.
  13. Frein de fils selon la revendication 12, caractérisé en ce qu'un l'élément de serrage (7) est constitué sous la forme d'un élément de traction élastomère ou sous la forme d'un ressort hélicoïdal.
  14. Frein de fils selon la revendication 12 ou 13, caractérisé en ce que le porte-rondelles (2) comporte plusieurs rainures (12), qui passent transversalement à une direction de serrage de l'élément de serrage (7) et dans lesquelles l'élément de maintien (8) peut être fixé.
EP21178971.4A 2021-06-11 2021-06-11 Frein de fils Active EP4101965B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21178971.4A EP4101965B1 (fr) 2021-06-11 2021-06-11 Frein de fils
CN202210256762.2A CN115467079B (zh) 2021-06-11 2022-03-16 纱线制动器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21178971.4A EP4101965B1 (fr) 2021-06-11 2021-06-11 Frein de fils

Publications (2)

Publication Number Publication Date
EP4101965A1 EP4101965A1 (fr) 2022-12-14
EP4101965B1 true EP4101965B1 (fr) 2025-01-01

Family

ID=76392256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21178971.4A Active EP4101965B1 (fr) 2021-06-11 2021-06-11 Frein de fils

Country Status (2)

Country Link
EP (1) EP4101965B1 (fr)
CN (1) CN115467079B (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3524151A1 (de) * 1985-07-05 1987-01-15 Frei Gmbh & Co Geb Fadenbremse fuer textilmaschinen
DE4104663C1 (fr) * 1991-02-15 1992-08-13 Memminger-Iro Gmbh, 7290 Freudenstadt, De
DE19743573A1 (de) * 1997-10-02 1999-04-15 Memminger Iro Gmbh Fadenbremse
US6907647B2 (en) * 2000-08-12 2005-06-21 William Prym Gmbh & Co. Kg Eyelet for reinforcing the edge of a hole in a carrier strip and device for attaching an eyelet to a carrier strip
DE102006058083A1 (de) * 2006-12-07 2008-06-12 Memminger-Iro Gmbh Verschließbare Fadenöse
TWI579425B (zh) * 2014-01-24 2017-04-21 陳仁惠 The improved structure of the yarn extruder
US11130652B2 (en) * 2018-05-03 2021-09-28 Nv Michel Van De Wiele Yarn tensioning system and method for keeping a yarn which is taken from a yarn storage system to a yarn take-off system of a weaving machine under tension
JP2020204106A (ja) * 2019-06-18 2020-12-24 株式会社島精機製作所 糸張力調整装置

Also Published As

Publication number Publication date
CN115467079B (zh) 2024-10-15
CN115467079A (zh) 2022-12-13
EP4101965A1 (fr) 2022-12-14

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