EP2985253A1 - Bague de frottement pour arbres de frottement, en particulier pour des bobines de rembobinage - Google Patents

Bague de frottement pour arbres de frottement, en particulier pour des bobines de rembobinage Download PDF

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Publication number
EP2985253A1
EP2985253A1 EP15180337.6A EP15180337A EP2985253A1 EP 2985253 A1 EP2985253 A1 EP 2985253A1 EP 15180337 A EP15180337 A EP 15180337A EP 2985253 A1 EP2985253 A1 EP 2985253A1
Authority
EP
European Patent Office
Prior art keywords
friction
ring
external
elastic means
internal
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.)
Granted
Application number
EP15180337.6A
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German (de)
English (en)
Other versions
EP2985253B1 (fr
Inventor
Stefano Gattrugeri
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.)
I E S International Expanding Shafts Srl
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I E S International Expanding Shafts Srl
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Publication of EP2985253A1 publication Critical patent/EP2985253A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/24—Constructional details adjustable in configuration, e.g. expansible
    • B65H75/242—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages
    • B65H75/246—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages expansion caused by relative rotation around the supporting spindle or core axis
    • B65H75/247—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages expansion caused by relative rotation around the supporting spindle or core axis using rollers or rods moving relative to a wedge or cam surface

Definitions

  • the present invention relates to a friction ring for friction shafts, particularly for rewinding spools.
  • friction rings are already known which are placed on friction shafts used to rewind multiple spools, with the possibility to avoid generating differences in traction during the winding of the various spools.
  • friction rings of the known type are provided by means of an internal ring, which can be arranged on the friction shaft, typically provided with strips that are extended parallel to the axis and provide friction, by introducing compressed air in chambers provided below said strips.
  • each individual core of the spools In order to integrally couple each individual core of the spools with the respective ring or rings, there is an external ring from which locking elements protrude which are usually constituted by balls or rollers that are loaded radially outwardly and are made to retract upon the insertion or extraction of the core of the spool by means of a rotation of said core or by means of a rotation of the shaft.
  • locking elements protrude which are usually constituted by balls or rollers that are loaded radially outwardly and are made to retract upon the insertion or extraction of the core of the spool by means of a rotation of said core or by means of a rotation of the shaft.
  • the balls or rollers are placed in guides that are defined on the outer surface of the internal ring and have a variable shape or depth, so that upon the rotation of the shaft, in a direction that is opposite to the spool rewinding direction, the balls or rollers are made to retract radially in order to allow the extraction of the spool from the shaft.
  • the aim of the invention is to solve one or more of the drawbacks described above.
  • an object of the invention is to allow the fitting of cores of spools on a friction shaft without imposing, manually or with a motor, a mutual rotation between said cores and the shaft.
  • Another object of the invention is to allow the extraction of the spools from a friction shaft without forcing, manually or with a motor, a mutual rotation between said spools and the shaft.
  • a further object of the invention is to reduce or eliminate the damage of the internal surface of the cores of the spools during insertion or extraction.
  • Another object of the present invention is to provide a friction ring for friction shafts, particularly for rewinding spools, that can be obtained easily with simple mechanical operations starting from commonly commercially available elements and materials and is further competitive from a merely economic standpoint.
  • the friction ring for friction shafts is designated generally by the reference numeral 1 and comprises an internal ring 2 that can be arranged on a friction shaft, generally designated by the reference numeral 3 and typically provided by means of a shaft body 4, which is provided peripherally with a plurality of strips 5 that are extended parallel to the axis and can expand radially by way of the action of expansion chambers 6 that can be connected to a compressed air supply circuit, not shown.
  • the strips 5 are made to expand with a pressure value that is variable as a function of the torque that one wishes to impart to the individual cores being rewound, so that the spools can adapt automatically to different traction conditions during winding.
  • the internal ring 2 is provided with a central body 10 which is provided, at one end, with a flange 11, which can be coupled to an external ring 15 provided with uniformly distributed openings 16 for the exit of locking elements constituted by balls 17 or, as an alternative, by rollers.
  • the openings 16, as an alternative, can be replaced with notches provided on the edges of the external ring.
  • the size of the openings is smaller than the diameter of the balls 17 or in any case such as to prevent complete crossing of the respective locking element.
  • the balls 17 are activated for their movement in a radial direction by the rotation between the internal ring 2 and the external ring 15.
  • the external ring 15 is held in position by means of a spiral locking ring 18 that is inserted in a groove 19 defined correspondingly on the central body 10.
  • the external ring 15 and the internal ring 2 are mutually and coaxially rotatable in contrast with elastic means, constituted advantageously by at least one compression spring 30 which acts between the external ring 15 and the internal ring 2, in particular between a tab 21 of a slot 20a and a ball 17a.
  • the compression spring 30 can be accommodated in an adapted slot provided in the central body 10.
  • Such compression spring 30 can act advantageously between a bottom wall of said slot and an abutment element that is integral with the external ring 15.
  • Said abutment element can be advantageously an abutment grub, which can be screwed onto the external ring 15, which can be inserted at least partially in said slot, at the opposite end with respect to the end against which the compression spring 30 acts.
  • the abutment grub can be screwed to the external ring after the assembly of the balls 17 and of said compression spring 30.
  • a particularity of the invention is that the balls 17 are adapted to retract radially toward the inside of the external ring 15 as the load on the elastic means, in particular on the compression spring 30, decreases. More specifically, in the rest condition of the compression spring 30, or in a condition in which the spring 30 is subject to a minimal load (i.e., in a stroke limit position 35 of the ball 17a), all the balls 17, 17a are substantially retracted into the respective openings 16, thus allowing free sliding of the core 31 of the spool 29 to be rewound or already rewound, along the friction shaft 3 on which the friction rings 1 according to the invention are fitted, without in any way having to rotate the shaft 3 or impart manually a rotation to the core 31.
  • the openings 16 that can be crossed only partially by the balls 17, 17a, when said elastic means are in the inactive condition or minimum load condition, are superimposed on a portion 33 of a respective ramp 20, 20a that is radially more internal than the peak point 34 of said ramp 20, 20a.
  • Said portion 33 can include an end wall 35 of the slot 20, while the other stroke limit wall 36 of the ball 17 is adjacent to the peak point 34 of the slot 20.
  • the balls 17 are thus completely or almost completely retracted into the friction ring 1 in the situation, when the machine is stationary, in which the cores 31 of the spools 29 must be fitted on the friction shaft 3 that mounts the friction rings 1 according to the invention or in which the rewound spools 31 must be removed from said shaft 3.
  • a dome-like portion 37 of each ball 17 can be left protruding toward the outside of the respective opening 16 in order to define a sliding bearing for the core 31 of the spool 29.
  • the locking elements constituted by the balls 17, 17a can protrude radially from the external ring 15 to an extent that is sufficient to allow the engagement of the ring 31, which is optionally empty, and its sliding, optionally with the presence of the spool 29, along the friction ring 1 without jamming.
  • the shaft 3 is made to rotate about its own axis by way of a motor, not shown, in the direction that allows the rewinding of a tape 38 around a respective core 31.
  • the mutual locking between the shaft 3 and the internal ring 2 causes, upon the start of the rotation of the shaft 3, a mutual rotation between the internal ring 2 and the external ring 15 of each friction ring 1 covered by a core 31.
  • This mutual rotation loads the compression spring 30 and entrains the balls 17, 17a pushed by the openings 16 in the radially rising direction of the ramps 12.
  • the balls 17, 17a protrude accordingly from the respective openings 16 until they lock against the internal surface of the cores 31, thus locking them on the shaft 3.
  • the shaft 3 is stopped and the compression spring 30 of each friction ring 1 covered by a core 31 returns to the inactive or minimum load condition, thus causing the balls 17 to retract into the respective openings 16, disengaging them from the cores 31.
  • the rewound spools can be extracted from the shaft 3 simply by pushing them in a direction that is parallel to the rotation axis of the shaft 3, without having to rotate it in the opposite direction with respect to the rewinding direction as occurs in the background art, where for this purpose it is necessary to provide a second motor for the shaft.
  • the materials used may be any according to requirements and to the state of the art.

Landscapes

  • Winding Of Webs (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
EP15180337.6A 2014-08-12 2015-08-10 Bague de frottement pour arbres de frottement, en particulier pour des bobines de rembobinage Active EP2985253B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20141488 2014-08-12

Publications (2)

Publication Number Publication Date
EP2985253A1 true EP2985253A1 (fr) 2016-02-17
EP2985253B1 EP2985253B1 (fr) 2018-12-05

Family

ID=51703266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15180337.6A Active EP2985253B1 (fr) 2014-08-12 2015-08-10 Bague de frottement pour arbres de frottement, en particulier pour des bobines de rembobinage

Country Status (2)

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EP (1) EP2985253B1 (fr)
TR (1) TR201902834T4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112962511A (zh) * 2019-12-29 2021-06-15 牛诗童 一种清雪方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2103761A (en) * 1981-07-22 1983-02-23 Hiroshi Kataoka Winding shafts
WO1991018819A1 (fr) * 1990-05-26 1991-12-12 Beloit Corporation Tete de serrage pour cylindres de bobinage
DE4244218C1 (de) * 1992-12-24 1994-04-07 Hans Heuser Friktionswickelwelle
DE19805211A1 (de) * 1998-02-10 1999-08-12 Schaeffler Waelzlager Ohg Spannvorrichtung zum Verbinden zweier umeinander angeordneter Bauteile
EP2345614A1 (fr) * 2010-01-15 2011-07-20 I.E.S International Expanding Shafts S.R.L. Bague de frottement pour arbres de frottement, en particulier pour enrouler des bobines
JP2012166860A (ja) * 2011-02-09 2012-09-06 Kataoka Mach Co Ltd 巻取カラー
WO2013128479A1 (fr) * 2012-02-27 2013-09-06 I.E.S. International Expanding Shafts S.R.L Arbre extensible pour supporter des bobines et des dispositifs similaires

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1283755B1 (it) * 1995-05-03 1998-04-30 Kampf Gmbh & Co Maschf Albero avvolgitore a frizione, in particolare per macchine per tagliare bobine e macchine avvolgitrici
JP5713278B2 (ja) * 2011-01-28 2015-05-07 株式会社片岡機械製作所 巻取カラー

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2103761A (en) * 1981-07-22 1983-02-23 Hiroshi Kataoka Winding shafts
WO1991018819A1 (fr) * 1990-05-26 1991-12-12 Beloit Corporation Tete de serrage pour cylindres de bobinage
DE4244218C1 (de) * 1992-12-24 1994-04-07 Hans Heuser Friktionswickelwelle
DE19805211A1 (de) * 1998-02-10 1999-08-12 Schaeffler Waelzlager Ohg Spannvorrichtung zum Verbinden zweier umeinander angeordneter Bauteile
EP2345614A1 (fr) * 2010-01-15 2011-07-20 I.E.S International Expanding Shafts S.R.L. Bague de frottement pour arbres de frottement, en particulier pour enrouler des bobines
JP2012166860A (ja) * 2011-02-09 2012-09-06 Kataoka Mach Co Ltd 巻取カラー
WO2013128479A1 (fr) * 2012-02-27 2013-09-06 I.E.S. International Expanding Shafts S.R.L Arbre extensible pour supporter des bobines et des dispositifs similaires

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112962511A (zh) * 2019-12-29 2021-06-15 牛诗童 一种清雪方法
CN112962510A (zh) * 2019-12-29 2021-06-15 牛诗童 一种拨盘及具有拨盘的清雪机压辊
CN113026654A (zh) * 2019-12-29 2021-06-25 牛诗童 一种减震器及具有减震器的清雪机压辊
CN112962511B (zh) * 2019-12-29 2022-09-27 威海汇晟智能装备有限公司 一种清雪方法

Also Published As

Publication number Publication date
TR201902834T4 (tr) 2019-03-21
EP2985253B1 (fr) 2018-12-05

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