EP2819941A1 - Arbre extensible pour supporter des bobines et des dispositifs similaires - Google Patents

Arbre extensible pour supporter des bobines et des dispositifs similaires

Info

Publication number
EP2819941A1
EP2819941A1 EP12722910.2A EP12722910A EP2819941A1 EP 2819941 A1 EP2819941 A1 EP 2819941A1 EP 12722910 A EP12722910 A EP 12722910A EP 2819941 A1 EP2819941 A1 EP 2819941A1
Authority
EP
European Patent Office
Prior art keywords
shaft
entrainment
shell
expandable
slots
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Withdrawn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
EP12722910.2A
Other languages
German (de)
English (en)
Inventor
Stefano Gattrugeri
Franco Pettinati
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
Original Assignee
I E S International Expanding Shafts Srl
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 I E S International Expanding Shafts Srl filed Critical I E S International Expanding Shafts Srl
Publication of EP2819941A1 publication Critical patent/EP2819941A1/fr
Withdrawn legal-status Critical Current

Links

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 an expandable shaft for supporting reels and the like, particularly for the winding or unwinding of reels.
  • expandable shafts which comprise an elongated cylindrical body provided, on the outer surface, with a plurality of battens capable of expanding radially as a result of the action of pneumatic chambers.
  • the centering of the cores on the shaft is achieved with supplementary contrivances, which can increase the complexity and cost of the shaft.
  • the aim of the present invention consists in providing an expandable shaft for supporting reels and the like which is structurally simple so as to overcome the aforementioned drawbacks.
  • an object of the invention is to provide a shaft that is expandable by mechanical means only, without resorting to pneumatic means, and which makes it possible to always maintain a stable clamping between the core of the reel and the shaft, even if the tensioning on the reel ceases or changes.
  • Another object of the present invention consists in providing an expandable shaft wherein it is possible to have a particularly rapid mounting without having to resort to adopting special tools or complex solutions.
  • Another object of the present invention consists in providing an expandable shaft that enables an installation of the core of the reel on the shaft that can be independent of the direction of rotation of the expandable shaft during the winding or unwinding of the reel.
  • Another object of the present invention is to provide an expandable shaft wherein it is possible to have a particularly rapid dismounting of the reel or only of the core from the shaft.
  • Another object of the present invention is to achieve the centering of the shaft with respect to the reels that it supports automatically, without having to resort to supplementary means.
  • Another object of the present invention is to provide an expandable shaft that, owing to its peculiar implementation characteristics, is capable of offering the widest guarantees of reliability and safety in use.
  • Another object of the present invention is to provide an expandable shaft that can be easily implemented with simple mechanical operations starting with elements and materials that are readily available on the market, and which, moreover, is competitive from a merely economical viewpoint.
  • an expandable shaft for supporting reels and the like particularly for the winding or unwinding of reels, characterized in that it comprises an entrainment shaft and a shell rotatably fitted over the entrainment shaft and extending substantially for the entire length of the entrainment shaft, the shell comprising openings through which elements can protrude for removably locking the core of a reel that can be fitted over the shell, means being further provided for activating the removable locking elements by way of mutual rotation between the shell and the entrainment shaft in contrast with the action of elastic means which act between the entrainment shaft and the shell, the activation means comprising a ramp on which a respective removable locking element slides entrained by the corresponding opening with said mutual rotation, so that said removable locking element is moved radially in said opening by said ramp according to the mutual position between said shell and said entrainment shaft.
  • the activation means can comprise a plurality of slots defined on the entrainment shaft, each one for a circumferential portion thereof, each one of the slots having a variable radial depth along the circumferential portion so as to define such ramp.
  • the openings of the shell are respectively overlaid on such slots.
  • the slots can be arranged in several longitudinal positions of the entrainment shaft. In each one of such longitudinal positions a plurality of slots can be provided, which intersect a same plane that is perpendicular to the axis of the entrainment shaft.
  • the longitudinal positions of the slots can be such that the slots are arranged mutually staggered along the entrainment shaft.
  • Each slot can define a first and a second ramp juxtaposed with the peak positioned between them, and the elastic means are defined by mutually opposite helical springs which are accommodated in at least one seat which is provided on the entrainment shaft and is fixed on opposite sides on an abutment which is movable together with the shell, the removable locking elements being positioned on the peak of the corresponding slot when the mutually opposite springs are in the position of equilibrium, so that the expandable shaft in its rest condition is in the expanded configuration.
  • each slot can define a first and a second ramp juxtaposed with the respective summits positioned at the opposite ends of the slot, so as to define a point of maximum depth of the slot between the first and second ramp
  • the elastic means are defined by mutually opposite helical springs which are accommodated in at least one seat which is provided on the entrainment shaft and which abute on opposite sides on an abutment which is movable together with the shell, the removable locking elements being positioned on such lowest point of the corresponding slot when the mutually opposite springs are in the position of equilibrium, so that the expandable shaft in its rest condition is in the non- expanded configuration.
  • At least two seats can be provided for respective pairs of said mutually opposite helical springs, the seats being arranged proximate to the opposite ends of the entrainment shaft.
  • the removable locking elements can be partially accommodated in the slots and partially passing through the openings of the shell.
  • the locking elements are spheres, rollers or runners.
  • Figure 1 is a perspective view of a first embodiment of the expandable shaft, particularly for the winding of reels, according to the invention
  • Figure 2 is an exploded perspective view of the expandable shaft shown in Figure 1 ;
  • Figure 3 is a longitudinal sectional view of the expandable shaft shown in Figure 1 with a plurality of reels applied;
  • Figure 4 is a cross-sectional view of the expandable shaft shown in Figure 1 in its non-operative or rest configuration
  • Figure 5 is a cross-sectional view of the expandable shaft shown in Figure 1 during the winding of the reels;
  • Figure 6 is a cross-sectional view of a second embodiment of the expandable shaft shown in Figure 1 in its non-operative configuration
  • Figure 7 is a cross-sectional view of the expandable shaft in Figure 6 during the winding of the reels.
  • the expandable shaft according to a first embodiment of the invention, which is generally designated by the reference numeral la, comprises an entrainment shaft 2 and at least one outer shell 3 which is rotatably fitted over the entrainment shaft 2 and which can be mated with at least a core 4 of a reel 5 to be wound or unwound by way of removable locking elements, preferably spheres 20 or rollers or runners, operating between the outer shell 3 and the entrainment shaft 2 and between the core 4 and the outer shell 3.
  • removable locking elements preferably spheres 20 or rollers or runners
  • the entrainment shaft 2 can be associated with motor means, for example a rereeling machine on which the expandable shaft la operates, and can be provided with means 7 for axially locking the outer shell 3 along its longitudinal axis 9.
  • motor means for example a rereeling machine on which the expandable shaft la operates
  • means 7 for axially locking the outer shell 3 along its longitudinal axis 9.
  • Such axial locking means 7 can comprise two grooves 10, provided at the ends of the entrainment shaft 2 and two spiral rings 11 accommodated in the grooves 10 and which are such as to define two axial abutment elements of the outer shell 3.
  • the spheres 20 can be activated by activation means 6 by way of a mutual rotation between the outer shell 3 and the entrainment shaft 2 in contrast with the action of elastic means 12 which act between the entrainment shaft 2 and the outer shell 3 in such a manner as to radially push outwardly the spheres 20 through openings 13 which are provided on the outer shell 3 and uniformly distributed thereon.
  • such elastic means 12 comprise at least one compression spring 14, but preferably two identical compression springs 14, which act against each other between the entrainment shaft 2 and the outer shell 3.
  • an accommodation seat 15 is provided directly on the entrainment shaft 2 and extends circumferentially with respect to the entrainment shaft 2 for a circumferential arc thereof.
  • an abutment dowel 16 which is movable with the outer shell 3, for example fixed inside to the outer shell 3 in such a manner as to be integral therewith in rotation.
  • the compression springs 14 act between two opposite surfaces of the abutment dowel 16 and the two ends 17 of the accommodation seat 15.
  • an introduction portion 18 can be provided that extends longitudinally with respect to the entrainment shaft 2 and which leads, on one side, to an axial end of the entrainment shaft 2 and leads on the other side to the accommodation seat 15, centrally with respect to the circumferential extension thereof, in such a manner as to be spaced from the ends 17 of the seat 15.
  • the introduction portion 18 makes it possible to perform the insertion of the compression springs 14 once the spheres 20 have been inserted, by positioning the abutment dowel 16 toward one of the ends 17 and then inserting the compression spring 14, making all of it go beyond the introduction portion 18 and allowing the expansion thereof so that the compression spring 14 is positioned against the opposite end 17 from the end toward which the dowel 16 was moved.
  • the compression springs 14, helical and identical to each other, are of such length as to remain preloaded in the position of equilibrium, i.e. in the non-operative or rest configuration, of the expandable shaft la, shown in Figures 1 and 4.
  • the accommodation seats 15, in addition to laterally guiding the compression springs 14 and providing them with an abutment surface, are of such a length as to entirely contain the compression springs 14 in the aforementioned position of equilibrium.
  • two pairs of accommodation seats 15 can be provided on the entrainment shaft 2, for example proximate to both ends of the latter.
  • such means comprise a plurality of first slots 19a which are provided directly on the surface of the entrainment shaft 2, each one for a circumferential portion thereof, and which have a variable radial depth along such circumferential portion.
  • these first slots 19a are provided at multiple longitudinal positions of the entrainment shaft 2 so that, at each one of these, at least two first slots 19a are defined so as to be substantially equidistant from each other along the circumferential extension at the longitudinal position considered.
  • first slots 19a are provided which are placed at 120° to each other on the same plane which is perpendicular to the axis of the entrainment shaft 2.
  • the spheres 20 are partially accommodated in the slots 19a and partially passing through the openings 13 for their partial egress through them following the mutual rotation of the outer shell 3 with respect to the entrainment shaft 2.
  • a sphere 20 and an opening 13 are provided for each first slot 19a.
  • At least one insertion path 21 can be advantageously provided on the entrainment shaft 2 which transversely crosses the slots 19a belonging to the assembly mentioned previously.
  • each slot 19a is defined by a first ramp 22a and by a second ramp 23 a which are opposite to each other and such as to define, at their point of incidence, a minimum radial depth of the slot 19a, i.e. a peak point in the slot 19a.
  • the slots 19a and the accommodation seat 15 of the springs 14 have a symmetry with respect to their midpoint, so as to render the expandable shaft la bidirectional.
  • the activation means 6 can comprise a plurality of second slots identical to the first slots 19a and also defined directly on the entrainment shaft 2.
  • Such second slots are arranged on the entrainment shaft 2 with the same arrangement as the first slots 19a but are axially and circumferentially staggered with respect to the first slots 19a, so as to optimize their distribution on the entrainment shaft.
  • a second embodiment of the invention generally designated by the reference numeral lb and shown in Figures 6 and 7, the structure and configuration of the expandable shaft lb is identical to that of the first embodiment with the sole exception of the ramps provided in the slots.
  • slots 19b are provided the bottom whereof, differently from the first slots 19a and from the second slots, is defined by a first ramp 22b and by a second ramp 23 b which are opposite to each other but such as to define, at their point of incidence, a maximum radial depth of the slot 19b.
  • the spheres 20 are arranged at the maximum radial depth of the slots 19b, i.e. they are accommodated for the most part in the slots 19b without protruding from the openings 13, as shown in Figure 6.
  • the maximum radial depth of the slots 19b can be selected so as to make the spheres 20 still protrude outwardly from the openings 13, but to such a reduced extent, for example 0.3mm, as to not prevent the core 4 from still being fitted over the shell 3.
  • the spheres 20 advantageously perform the function of bearings during installation of the core 4 on the expandable shaft lb.
  • the slots 19b and the accommodation seats 15 of the springs 14 have a symmetry with respect to their midpoint, so as to render the expandable shaft lb bidirectional.
  • the core 4 can be fitted over the expandable shaft lb with a mutual movement of translational motion only, and the locking of the core 4 on the shell 3 is achieved with the rotation of the entrainment shaft 2, for winding, or with the tensioning of the tape to be unwound from the reel, for unwinding.
  • the core 4 of the reel to be wound can be fitted over the shell 3 with a combined rotary and translational motion, in which the rotary component applied to the core 4 when mounting on the shell 3 is in the direction of rotation that the entrainment shaft 2 will have when the reel is being wound, indicated in Figure 5.
  • the spheres 20 are pulled toward one of the ends of the slots 19a and, with them, the shell 3 is made to rotate with respect to the entrainment shaft 2. Subsequently, with the cessation of the combined rotary and translational motion, the springs 14 tend to make the shell 3 return to the inactive position, consequently causing the partial egress from the openings 13 of the spheres 20, which are stuck in place between one of the ramps 22a or 23 a and the inner surface of the core 4. Thus the clamping is automatically achieved of the core 4 on the expandable shaft la.
  • the entrainment shaft 2 can further recover part of the above mentioned rotation, further pushing the spheres 20 out from the openings 13 of the shell 3.
  • the cores 4 can be fitted over the expandable shaft lb with a movement of translational motion only.
  • the entrainment shaft 2 initially rotates by a certain angle with respect to the outer shell 3 thus forcing the spheres 20 to rise along the ramps 22b or 23b and as a consequence making them protrude through the openings 13 of the shell 3, so as to make the spheres 20 stick between the ramps 22b or 23 b and the inner surface of the core 4, as shown in Figure 7.
  • such reel can be fitted over the expandable shaft lb without taking account of the direction of traction of the tape to be unwound from the reel.
  • the number of parts necessary to obtain an expandable shaft according to the invention is drastically reduced thanks also to the fact that the entrainment shaft is made in a single piece, on which the ramps necessary for the radial movement of the locking elements are provided directly.
  • the structure of the shaft according to the invention makes it possible to also obtain a perfect centering of the cores, without having to use supplementary pre-centering means.

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  • Storage Of Web-Like Or Filamentary Materials (AREA)

Abstract

L'invention porte sur un arbre extensible (1a, 1b), qui comporte un arbre d'entraînement (2) et une enveloppe (3) disposée de façon à pouvoir tourner sur l'arbre d'entraînement (2), et s'étendant sensiblement sur la totalité de la longueur de celui-ci. L'enveloppe (3) comprend des ouvertures (13) à travers lesquelles des éléments (20) peuvent faire saillie pour verrouiller de façon amovible le noyau (4) d'une bobine qui peut être disposé sur l'enveloppe (3), des moyens (6) étant en outre disposés pour activer les éléments (20) à l'aide d'une rotation mutuelle entre l'enveloppe (3) et l'arbre d'entraînement (2) à l'encontre de l'action de moyens élastiques (12) qui agissent entre l'arbre d'entraînement (2) et l'enveloppe (3). Les moyens d'activation (6) comprennent une rampe sur laquelle un élément de verrouillage amovible respectif (20) coulisse, entraîné par l'ouverture correspondante (13) avec la rotation mutuelle précédemment mentionnée, de telle sorte que l'élément de verrouillage amovible (20) est déplacé radialement dans l'ouverture (13) par la rampe en fonction de la position mutuelle entre l'enveloppe (3) et l'arbre d'entraînement (2).
EP12722910.2A 2012-02-27 2012-02-27 Arbre extensible pour supporter des bobines et des dispositifs similaires Withdrawn EP2819941A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2012/000058 WO2013128479A1 (fr) 2012-02-27 2012-02-27 Arbre extensible pour supporter des bobines et des dispositifs similaires

Publications (1)

Publication Number Publication Date
EP2819941A1 true EP2819941A1 (fr) 2015-01-07

Family

ID=46147616

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12722910.2A Withdrawn EP2819941A1 (fr) 2012-02-27 2012-02-27 Arbre extensible pour supporter des bobines et des dispositifs similaires

Country Status (2)

Country Link
EP (1) EP2819941A1 (fr)
WO (1) WO2013128479A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110526041A (zh) * 2019-09-27 2019-12-03 广东利元亨智能装备股份有限公司 胀紧机构及卷绕机构

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103668476A (zh) * 2013-12-24 2014-03-26 徐存然 一种组合式绕丝装置
EP2985253B1 (fr) * 2014-08-12 2018-12-05 I.E.S International Expanding Shafts S.R.L. Bague de frottement pour arbres de frottement, en particulier pour des bobines de rembobinage
CN108408495B (zh) * 2018-04-17 2024-07-26 江阴市秀祥卷轴有限公司 胀紧件管控牢靠的胀紧圈
US11731854B2 (en) * 2021-08-10 2023-08-22 Lg Energy Solution, Ltd. Chuck assembly for holding a reel

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2561745A (en) * 1947-06-06 1951-07-24 Western Electric Co Apparatus for locking tubular members on shafts
DE2106493C3 (de) * 1971-02-11 1979-09-06 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Selbstspannender Auflaufspulenhalter
US4496114A (en) * 1981-07-22 1985-01-29 Hiroshi Kataoka Winding shaft provided on surface with spool fixing rollers
JPS6241146A (ja) * 1985-08-20 1987-02-23 Kataoka Mach Co Ltd シ−ト巻軸
DE59004646D1 (de) * 1990-05-26 1994-03-24 Beloit Technologies Inc Spannkopf für wickelhülsen.
JPH10265104A (ja) * 1997-03-24 1998-10-06 River Seiki Kk シートロールの芯管用支持軸
IT1397733B1 (it) * 2010-01-15 2013-01-24 I E S Internat Expanding Shafts S R L Anello di frizione per alberi a frizione, particolarmente per il riavvolgimento di bobine.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013128479A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110526041A (zh) * 2019-09-27 2019-12-03 广东利元亨智能装备股份有限公司 胀紧机构及卷绕机构

Also Published As

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