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WO1991007344A1 - Appareil servant a derouler un fil - Google Patents

Appareil servant a derouler un fil Download PDF

Info

Publication number
WO1991007344A1
WO1991007344A1 PCT/FI1990/000275 FI9000275W WO9107344A1 WO 1991007344 A1 WO1991007344 A1 WO 1991007344A1 FI 9000275 W FI9000275 W FI 9000275W WO 9107344 A1 WO9107344 A1 WO 9107344A1
Authority
WO
WIPO (PCT)
Prior art keywords
reel
thread
brake wheel
fibre
unreeling
Prior art date
Application number
PCT/FI1990/000275
Other languages
English (en)
Inventor
Teuvo Päivinen
Original Assignee
Nokia Kaapeli Oy
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 Nokia Kaapeli Oy filed Critical Nokia Kaapeli Oy
Publication of WO1991007344A1 publication Critical patent/WO1991007344A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/4457—Bobbins; Reels
    • 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
    • B65H59/02—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package
    • B65H59/04—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on package or support
    • 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
    • B65H59/16—Braked elements rotated by material

Definitions

  • This invention relates to an apparatus for un ⁇ reeling a thread, such as an optical fibre, com- prising
  • a supporting means resting on the body for rotatably supporting a reel from which the thread is to be unreeled; and - a braking means for braking the rotation of the reel.
  • the invention will be described in the follow ⁇ ing mainly in connection with the production of optical cables as the invention can be particularly advantageously applied to the unreeling of optical fibres; however, the word "thread” is used in its wide meaning so that it refers not only to optical fibres but also to ordinary wires used in electric conductor elements and cables.
  • the achievement and control of tension (load, tightness) in an optical fibre is essential in the production of the structural parts of a cable.
  • the initial tension of the fibres should be relatively stable, so that all fibres in the multi-fibre tube will have approximate ⁇ ly the same tension.
  • Fibre tensions applied in the production of a loose tubular coating are generally low, below 200 p. However, higher values of initial tension are required when the filling greases presently in use are replaced with stiffer filling greases used in the tubes. If the braking of the starting reel is increased to achieve a higher initial fibre tension, there exists a danger that the fibre cuts into the fibre layer on the reel during the unreeling of the fibre.
  • a more advanced way is to provide the brake with a feedback, such as a continuous measurement of tension and equivalent adjustment of the brake, or with a so-called dancer control.
  • a feedback such as a continuous measurement of tension and equivalent adjustment of the brake, or with a so-called dancer control.
  • the measuring and control means are, however, relatively complicated.
  • High initial tension values can be obtained by belt drive or multi-wheel drive means (capstans) but the unreeling apparatuses are thereby large as well as expensive.
  • the object of the present invention is to provide an unreeling apparatus which avoids the above-mentioned drawbacks and enables the achievement and control of high initial tension values with relatively simple means. This object is achieved by means of an apparatus of the invention which is characterized in that it comprises a brake wheel receiving the thread unwound from the reel; and
  • the invention is based on the idea that the movement of the thread unwound from the reel is utilized to increase the unreeling tension of the fibre to be unreeled to a desired initial tension without causing a corresponding increase in the un ⁇ reeling tension of the reel.
  • Both low and high initial tensions can be obtained directly from the apparatus. Due to the operating principle of the apparatus the drawbacks caused by asymmetric and loose reeling are compensated for to some extent.
  • the initial tension of the fibre emerging from the apparatus does not vary significantly with the un- reeling radius of the reel. Accordingly, long fibres can be unwound from the apparatus without any need to adjust the tension, which makes the apparatus simple in construction.
  • Figures 1 and 2 show one preferred embodiment of an unreeling apparatus according to the invention in two different directions; and Figure 3 illustrates schematically the oper ⁇ ating principle of the apparatus.
  • the apparatus shown in the drawing comprises a body 1 to which a magnetic powder clutch -2 is attached.
  • a horizontal support shaft 3 for a fibre reel 4 from which the fibre is to be unwound is attached to one shaft of the clutch 2 while a brake wheel 6 is attached co-axially with the support shaft to its other shaft 5.
  • an idler wheel 7 is mounted rotatably to the body. The reel is attached unrotatably to the support shaft 3 and the brake wheel to the shaft 5.
  • a clutch of this type is manufactured, e.g., by a French company S. A. EROBEL with the type marking EFAS 2.
  • the clutch is connected electrically to a control device not shown for controlling the braking torque created by the clutch.
  • the unreeling apparatus operates in the following way:
  • the braking torque of the clutch is adjusted electrically to a desired value.
  • a fibre 8 is passed from the reel over the idler wheel and further onto the brake wheel and around it, in this particular case through 270°.
  • the reel and the brake wheel rotate in opposite directions, so that they brake the rotation of each other with the preset braking torque of the clutch.
  • a simple mathematical presen- tation of the behaviour of the tension of the fibre during the unreeling will be explained with reference to Figure 3. As the friction forces are very low, they are not taken into account. The following symbols will be used
  • FI the unreeling tension of the fibre unwound from the reel
  • F2 the initial tension of the fibre emerging from the apparatus
  • Rk the radius of the fibre reel
  • Rp - the radius of the brake wheel
  • Mj the braking torque of the clutch
  • a fibre exposed to this tension can be unreeled directly without any risk of the fibre cutting into the reeled layer.
  • the initial tension F2 of the fibre can be calculated as follows:
  • the drawing and the description related to it are only intended to illustrate the idea of the in ⁇ vention.
  • the apparatus may vary within the scope of the claims.
  • the apparatus is pre ⁇ ferably used in providing a secondary sheathing on an optical fibre.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Abstract

Appareil servant à dérouler un fil, tel qu'une fibre optique, comportant un moyen de support (3) servant à supporter en rotation un dévidoir (4), ainsi qu'un moyen de freinage (2) servant à freiner la rotation du dévidoir. Afin d'obtenir une tension initiale élevée (F2) pour le fil (8) devant être déroulé avec une faible tension initiale (F1), l'appareil comporte une roue de freinage (6) qui reçoit un fil (8) déroulé du dévidoir, et qui est reliée à ce dernier par l'intermédiaire du moyen de freinage (2) de manière telle que le dévidoir et la roue de freinage tournent dans des sens contraires.
PCT/FI1990/000275 1989-11-17 1990-11-15 Appareil servant a derouler un fil WO1991007344A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI895496A FI84049C (fi) 1989-11-17 1989-11-17 Anordning foer avlindning av en traod fraon en spole.
FI895496 1989-11-17

Publications (1)

Publication Number Publication Date
WO1991007344A1 true WO1991007344A1 (fr) 1991-05-30

Family

ID=8529375

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1990/000275 WO1991007344A1 (fr) 1989-11-17 1990-11-15 Appareil servant a derouler un fil

Country Status (3)

Country Link
AU (1) AU6644990A (fr)
FI (1) FI84049C (fr)
WO (1) WO1991007344A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016206332A1 (fr) * 2015-06-25 2016-12-29 江苏海大印染机械有限公司 Dispositif d'impression et teinture sur la base d'une commande de tension et de synchronisation de multiples machines

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1865781A (en) * 1930-05-13 1932-07-05 Najarian Garabed Wire drawing machine
DE938904C (de) * 1952-09-11 1956-02-09 Hugo Engels Aus einer Zieh- und einer Abzugstrommel bestehende Drahtziehtrommel mit zwischen beiden Trommeln eingeschaltetem Differentialabnehmer
DE1574373A1 (de) * 1967-04-07 1971-09-02 Kabel Metallwerke Ghh Vorrichtung zum voruebergehenden Speichern von strangfoermigem Gut
DE2052767A1 (de) * 1970-10-28 1972-05-04 Roth U Pfeiffer Bauer U Co Gmb Einrichtung zum Abziehen von Draht in Drahtziehmaschinen und Weitergeben des selben an Haspel oder dergleichen
GB1437499A (en) * 1972-12-26 1976-05-26 Kobe Steel Ltd Store for wire or other continuous filamentary materials
GB2012826A (en) * 1977-12-05 1979-08-01 Orion Machinery & Eng Double block accumulator
EP0369237A1 (fr) * 1988-11-16 1990-05-23 CASAGRANDE SpA Dispositif pour accumuler des produits filiformes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1865781A (en) * 1930-05-13 1932-07-05 Najarian Garabed Wire drawing machine
DE938904C (de) * 1952-09-11 1956-02-09 Hugo Engels Aus einer Zieh- und einer Abzugstrommel bestehende Drahtziehtrommel mit zwischen beiden Trommeln eingeschaltetem Differentialabnehmer
DE1574373A1 (de) * 1967-04-07 1971-09-02 Kabel Metallwerke Ghh Vorrichtung zum voruebergehenden Speichern von strangfoermigem Gut
DE2052767A1 (de) * 1970-10-28 1972-05-04 Roth U Pfeiffer Bauer U Co Gmb Einrichtung zum Abziehen von Draht in Drahtziehmaschinen und Weitergeben des selben an Haspel oder dergleichen
GB1437499A (en) * 1972-12-26 1976-05-26 Kobe Steel Ltd Store for wire or other continuous filamentary materials
GB2012826A (en) * 1977-12-05 1979-08-01 Orion Machinery & Eng Double block accumulator
EP0369237A1 (fr) * 1988-11-16 1990-05-23 CASAGRANDE SpA Dispositif pour accumuler des produits filiformes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 7, No. 50, M197; & JP,A,57 199 756, 07-12-1982, (DAIDO TOKUSHUKO K.K.). *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016206332A1 (fr) * 2015-06-25 2016-12-29 江苏海大印染机械有限公司 Dispositif d'impression et teinture sur la base d'une commande de tension et de synchronisation de multiples machines

Also Published As

Publication number Publication date
FI84049B (fi) 1991-06-28
FI895496A0 (fi) 1989-11-17
FI895496A7 (fi) 1991-05-18
AU6644990A (en) 1991-06-13
FI84049C (fi) 1991-10-10

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