EP2623653A1 - Agencement de barres de stockage d'un métier à tricoter à chaîne - Google Patents

Agencement de barres de stockage d'un métier à tricoter à chaîne Download PDF

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Publication number
EP2623653A1
EP2623653A1 EP12000750.5A EP12000750A EP2623653A1 EP 2623653 A1 EP2623653 A1 EP 2623653A1 EP 12000750 A EP12000750 A EP 12000750A EP 2623653 A1 EP2623653 A1 EP 2623653A1
Authority
EP
European Patent Office
Prior art keywords
guide bar
elastomeric body
guide
arrangement according
bar arrangement
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Withdrawn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
EP12000750.5A
Other languages
German (de)
English (en)
Inventor
Torsten Saal
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 Textilmaschinenfabrik GmbH
Original Assignee
Karl Mayer Textilmaschinenfabrik 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 Textilmaschinenfabrik GmbH filed Critical Karl Mayer Textilmaschinenfabrik GmbH
Priority to EP12000750.5A priority Critical patent/EP2623653A1/fr
Priority to CN201210143222XA priority patent/CN103243475A/zh
Publication of EP2623653A1 publication Critical patent/EP2623653A1/fr
Withdrawn legal-status Critical Current

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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
    • D04B27/24—Thread guide bar assemblies
    • 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
    • D04B27/24—Thread guide bar assemblies
    • D04B27/26—Shogging devices therefor
    • D04B27/30—Shogging devices therefor with driving-gear comprising force-multiplication devices
    • 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
    • D04B27/24—Thread guide bar assemblies
    • D04B27/32—Thread guide bar assemblies with independently-movable thread guides controlled by Jacquard mechanisms

Definitions

  • the invention relates to a guide bar assembly of a warp knitting machine with at least one thread guide, which is movable by a drive means in an offset direction back and forth, wherein the drive means comprises a drive and a return device.
  • the invention will be described below with reference to a so-called "string barre” in which the thread guides, usually pin needles, are arranged on a pliable drive element. In order to move this drive element in both directions, it must be acted upon from its two ends with a clamping force. At one end, the drive acts on the drive element and at the other end acts the return device.
  • the invention is also applicable to guide bars, which carry a plurality of needles, which are arranged side by side and serve, for example, to produce a basic product.
  • a guide bar arrangement of the type mentioned is out DE 101 37 601 B4 known.
  • several groups of yarn guides are arranged in a bar body.
  • Each group has a drive element for the assigned thread guides.
  • the drive element is driven at one end by a drive motor and loaded at the other end by a restoring device with a restoring force.
  • the restoring device is designed here as an air cylinder.
  • the drive and the return device can also attack at the same end of the guide bar.
  • a warp knitting machine should be able to work with the highest possible working speed.
  • the working speed is often expressed in "revolutions per minute”. At each turn, a loop is usually formed.
  • Working speeds of 4,000 rpm are currently possible.
  • the invention has for its object to achieve the highest possible operating speed in the operation of a warp knitting machine.
  • This object is achieved in a guide bar arrangement of a warp knitting machine of the type mentioned above in that the restoring device has an elastomeric body which generates a spring force in the pulling direction by a material strain.
  • the spring force is thus not generated, as in conventional coil springs, by a deformation, but by an elongation of the material of the elastomeric body.
  • Such a material strain creates a large internal friction in the elastomeric body.
  • This internal friction leads to a relatively high internal damping, so that the danger is low, that even at higher operating speeds results in a swing.
  • the resonance range ie the range of a critical natural frequency of the restoring device, is further shifted in the direction of higher rotational speeds, so that higher working speeds can be achieved with the warp knitting machine without the risk of a resonance phenomenon.
  • the elastomeric body is greater in the tensile direction than in a thickness direction transverse to the tensile direction.
  • the elastomeric body in the pulling direction has an extension which is at least 5 times, in particular at least 10 times and more preferably at least 30 times as great as its extent in the thickness direction.
  • the elastomeric body thus has a pronounced length. But he is relatively thin across this length. It can therefore be accommodated to save space. This is particularly advantageous when used in conjunction with so-called "string ingots" because relatively many drive elements for the yarn guides are accommodated in a small space and a separate return device is required for each drive element, ie for each group of yarn guides is. If each return device is relatively thin, then this training offers no major problems.
  • the elastomeric body is formed as a rope, round cord or band.
  • a rope or band has the characteristic that it is relatively long and relatively thin.
  • a band differs from a rope in that it has a small thickness but a slightly wider width. However, here too the length is much greater than the thickness and the width.
  • Ropes or ribbons of elastomeric materials having the desired properties are sufficiently available on the market, for example for fastening purposes.
  • An example of this is a "rubber band” or "rubber cord” that can be used to attach luggage to a bicycle rack.
  • the rope or band comprises a plurality of strands of an elastomeric material which are assembled transversely to the direction of pull.
  • a force is applied in the direction of pull, there is often a friction between the individual strands, which can advantageously increase the internal damping of the rope or the strap.
  • one can determine the spring force of the elastomeric body by selecting the individual strands.
  • the rope or band is formed as a textile composite. So basically, all the techniques and procedures known from textile technology can be used to assemble the strands.
  • the strands are intertwined, stranded or twisted. In all possibilities results in a sufficient inner cohesion of the strands, which results in a correspondingly good damping.
  • the strands are continuous throughout the length of the elastomeric body. There are thus no connecting sections between individual strands in the longitudinal direction, which results in a different material strain.
  • the continuous strands therefore allow a uniform material expansion, which in turn keeps the risk of disturbing vibrations small.
  • the yarn guide is connected to the elastomeric body via a translation assembly.
  • the translation arrangement changes the force and displacement with which the elastomeric body acts on the thread guide.
  • the product of force and path remains constant, ie at half power, the double path is required. At halfway the double force is required. If one uses such a translation arrangement, then one can use an elastomeric body, which in itself does not meet the desired requirements. For example, he can work with less force or with less deflection.
  • the path ultimately taken by the thread guide is determined by the translation arrangement.
  • the translation arrangement comprises a pulley with a rope which is guided over at least one movable roller on.
  • a pulley with at least one roller is a relatively simple embodiment of a translation arrangement. It works with low losses and can still react relatively quickly, which is advantageous at high working speeds of the warp knitting machine.
  • the movable roller is connected to the thread guide, wherein one end of the rope is fixed in place and the other end is connected to the elastomeric body.
  • the movement of the thread guide against the movement of the elastomeric body by a factor of 2 is reduced.
  • the elastomeric body acts with twice the force on the yarn guide. The higher force is particularly advantageous if the thread guide is driven by a slippery drive element, for example a wire or a wire rope.
  • the movable roller is connected to the elastomeric body, wherein one end of the rope is fixed in place and the other end is connected to the yarn guide.
  • the movement of the thread guide is twice as large as the corresponding movement of the elastomeric body. This results in low retraction speeds, ie at the end of the elastomeric body, and therefore a faster reactivity.
  • the movable roller is movable in the vertical direction.
  • gravity always acts in the direction of movement of the roller, so that additional fixations are not required.
  • the movable roller is guided by a guide.
  • the direction of movement of the roller deviates from the offset direction and the roller is connected via a deflection device with the elastomeric body.
  • a deflection device with the elastomeric body.
  • Fig. 1 shows in a highly schematic form a guide bar arrangement 1 of a warp knitting machine, not shown.
  • the guide bar arrangement has a thread guide 2 in the form of a laying or perforated needle.
  • the yarn guide 2 is attached to a drive element 3, which is formed in the present case as a thin wire or wire or plastic wire.
  • the drive element 3 is here in any case limp, so that it must be acted upon at its two ends with oppositely directed tensile forces to retain its extended position and thus set the position of the yarn guide 2.
  • Such guide bar assemblies are configured with up to 16 drive elements 3.
  • a thread guide 2 is fastened to a drive element 3, but in each case a group of thread guides 2, which are then moved together.
  • the drive element 3 is guided in a bar body 4.
  • the bar body 4 has for this purpose a guide groove for the drive element 3, which is not shown in detail.
  • the yarn guide 2 is to be moved in the operation of the warp knitting machine for stitch formation in the offset direction 5 can, which is represented here by a double arrow.
  • the offset direction corresponds to the longitudinal direction of the bar body 4.
  • a drive 6 is provided, which is connected via the drive element 3 with the yarn guide 2.
  • the drive 6 is shown here as a linear drive. But it is also possible to form the drive 6 as a rotary drive, with suitable measures are taken to translate a rotational movement in a translational movement.
  • the drive 6 is fixed in a schematically illustrated manner on the machine frame 8.
  • the drive element 3 is movable relative to the machine frame 8.
  • the other end of the drive element 3 is connected to a return device 7.
  • the restoring device 7 is, in simplified terms, designed as a "rubber rope".
  • the restoring device 7 thus has an elastomeric body, which generates a spring force in the pulling direction by a material strain.
  • the return device 7 differs for example from a conventional coil spring, in which the tensile force is caused by a deformation.
  • the length of the elastomeric body is substantially greater than its extension in directions perpendicular to the longitudinal direction.
  • the length is at least 5 times, in particular at least 10 times and preferably at least 30 times as large as the Extension in the thickness direction.
  • the elastomeric body of the return device 7 may be formed as a rope or as a band. For a band, though, there is a width that is greater than the thickness. The length of the band is still much larger than the width.
  • the elastomeric body may also be formed as a round cord.
  • the rope or band may comprise a plurality of strands of an elastomeric material, which are arranged side by side transversely to the pulling direction and connected to each other, which are thus composed transversely to the pulling direction.
  • the rope or band may be formed as a textile composite, in which one can use virtually all techniques that are known from the textile industry.
  • the strands are intertwined, stranded or twisted.
  • the strands should be formed continuously over the length of the elastomeric body.
  • Fig. 1 a configuration is shown in which the yarn guide 2 is connected via the drive element 3 directly to the elastomeric body of the return device 7.
  • the moving body of the end 9 of the elastomeric body of the return device 7 takes place in the vertical direction, because the elastomeric body of the return device 7 parallel to the direction of gravity on the machine frame 8 is suspended.
  • the offset direction 5, however, is horizontal. For this reason, a pulley 14 is provided, via which the force of the return device 7 is transmitted to the yarn guide 2.
  • the elastomeric body of the return device 7 must be able to apply the necessary restoring forces.
  • the free end 9 of the elastomeric body must also be able to follow the movement stroke of the yarn guide 2. This is readily possible with a corresponding dimensioning of the elastomeric body of the return device 7.
  • FIGS. 2 and 3 show further possibilities to defuse these conditions a bit.
  • the yarn guide is connected in each case via a pulley with the elastomeric body of the return device 7.
  • the pulley has here a rope 10 and a movable roller 11.
  • the term "rope” is to be understood here broadly. It can also be a band or a chain, ie virtually all elements that can be guided around a movable roller 11.
  • the movable roller 11 is vertically movable, ie in the direction of gravity. It is guided here in a guide 12. For this purpose, it may be provided with a guide projection 13. In a manner not shown, the roller 11 but also be movable in other directions. If the direction of movement of the roller 11 does not coincide with the offset direction 5, then the guide roller 14 is provided, which performs a corresponding deflection of the directions of movement.
  • the cable 10 is connected at one end 15 via the drive element 3 with the yarn guide 2.
  • the other end 16 of the rope is fixedly fixed to the machine frame 8.
  • the movable roller 11 is connected to the free end 9 of the elastomeric body of the return device 7.
  • a movement stroke of the movable roller 11 is half as large as a displacement stroke of the yarn guide 2. Accordingly, the free end 9 of the elastomeric body of the return device 7 must perform only half a stroke as the yarn guide 2. This results in shorter paths in the return device 7 and thus lower speeds of the free end 9 of the elastomeric body. This is usually associated with a relatively good responsiveness.
  • the return device 7 must be able to apply relatively high forces. In the present case, the forces must be twice as large as in a case where the driving member 3 is directly connected to the restoring means 7, see Fig. 1 ,
  • the movable roller 11 is connected to the drive element 3.
  • the cable 10 is fixed at one end to the machine frame 8 and the other end at the free end 9 of the elastomeric body of the return device 7, which is also fixed to the machine frame 8 with its other end.
  • the movement stroke of the movable roller 11 corresponds to the offset stroke of the yarn guide 2.
  • the free end 9 of the elastomeric body the return device 7 perform twice as large movement.
  • the elastomeric body can operate with half the return force as in the case where the yarn guide 2 is connected via the drive element 3 directly to the return device 7, see Fig. 1 ,
  • roller 11 instead of a roller 11 shown one can train the pulley with more than one role. This can be used to realize other gear ratios.
  • a pulley any translation arrangement can be used.
  • a pulley works relatively low loss and without interference, as they may arise, for example, by tooth meshing of gears.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP12000750.5A 2012-02-04 2012-02-04 Agencement de barres de stockage d'un métier à tricoter à chaîne Withdrawn EP2623653A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12000750.5A EP2623653A1 (fr) 2012-02-04 2012-02-04 Agencement de barres de stockage d'un métier à tricoter à chaîne
CN201210143222XA CN103243475A (zh) 2012-02-04 2012-04-27 经编机的梳栉组件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12000750.5A EP2623653A1 (fr) 2012-02-04 2012-02-04 Agencement de barres de stockage d'un métier à tricoter à chaîne

Publications (1)

Publication Number Publication Date
EP2623653A1 true EP2623653A1 (fr) 2013-08-07

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Family Applications (1)

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EP12000750.5A Withdrawn EP2623653A1 (fr) 2012-02-04 2012-02-04 Agencement de barres de stockage d'un métier à tricoter à chaîne

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EP (1) EP2623653A1 (fr)
CN (1) CN103243475A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104032477A (zh) * 2014-06-30 2014-09-10 常州市龙春针织机械科技有限公司 用于经编机的钢丝绳导轮

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3634021C1 (de) * 1986-10-06 1988-01-21 Liba Maschf Vorrichtung zum periodischen Versetzen der Legeschiene einer Kettenwirkmaschine
DE4303967A1 (de) * 1993-02-10 1994-08-11 Liba Maschf Kettenwirkmaschine mit auf einer Legebarre angebrachten individuell bewegbaren Fadenführern
DE10137601B4 (de) 2001-08-01 2006-09-07 Karl Mayer Textilmaschinenfabrik Gmbh Kettenwirkmaschine mit mindestens einer Musterlegebarre

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1230959B (de) * 1959-02-28 1966-12-22 Karl Liebrandt Verfahren zur Herstellung von Kettenwirkware mit in Abstaenden quer ueber die Warenbahn verlaufenden, in ihrer Beschaffenheit von der Beschaffenheit der uebrigen Ware abweichenden Trennstreifen
CH609390A5 (fr) * 1976-03-05 1979-02-28 Sulzer Ag
DE4114012C3 (de) * 1991-04-29 1996-07-04 Liba Maschf Kettenwirkmaschine mit auf einer Legebarre angebrachten individuell bewegbaren Fadenführern
DE10332234B4 (de) * 2003-07-16 2008-05-21 Karl Mayer Textilmaschinenfabrik Gmbh Kettenwirkmaschine
EP2204481B1 (fr) * 2008-12-30 2013-07-10 L.G.L. Electronics S.p.A. Fournisseur de fil positif avec limiteur de tension
DE102009027422A1 (de) * 2009-07-02 2011-01-05 Robert Bosch Gmbh Vorrichtung zur Reduktion und/oder Kompensation von Vibrationen, insbesondere für eine Handwerkzeugmaschine und zur Verwendung in Handwerkzeugmaschinen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3634021C1 (de) * 1986-10-06 1988-01-21 Liba Maschf Vorrichtung zum periodischen Versetzen der Legeschiene einer Kettenwirkmaschine
DE4303967A1 (de) * 1993-02-10 1994-08-11 Liba Maschf Kettenwirkmaschine mit auf einer Legebarre angebrachten individuell bewegbaren Fadenführern
DE10137601B4 (de) 2001-08-01 2006-09-07 Karl Mayer Textilmaschinenfabrik Gmbh Kettenwirkmaschine mit mindestens einer Musterlegebarre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104032477A (zh) * 2014-06-30 2014-09-10 常州市龙春针织机械科技有限公司 用于经编机的钢丝绳导轮

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