EP0665180A2 - Pneumatisch betätigte Expansionswickelwelle mit mechanischer selbstzentrierender Vorrichtung - Google Patents

Pneumatisch betätigte Expansionswickelwelle mit mechanischer selbstzentrierender Vorrichtung Download PDF

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Publication number
EP0665180A2
EP0665180A2 EP95100854A EP95100854A EP0665180A2 EP 0665180 A2 EP0665180 A2 EP 0665180A2 EP 95100854 A EP95100854 A EP 95100854A EP 95100854 A EP95100854 A EP 95100854A EP 0665180 A2 EP0665180 A2 EP 0665180A2
Authority
EP
European Patent Office
Prior art keywords
strips
expanding shaft
mechanical pre
pneumatically
shaft according
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
EP95100854A
Other languages
English (en)
French (fr)
Other versions
EP0665180A3 (de
EP0665180B1 (de
Inventor
Giovanni 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
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 EP0665180A2 publication Critical patent/EP0665180A2/de
Publication of EP0665180A3 publication Critical patent/EP0665180A3/de
Application granted granted Critical
Publication of EP0665180B1 publication Critical patent/EP0665180B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H75/243—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages actuated by use of a fluid
    • B65H75/2437—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages actuated by use of a fluid comprising a fluid-pressure-actuated elastic member, e.g. a diaphragm or a pneumatic tube

Definitions

  • the present invention relates to a pneumatically-actuated expanding shaft with mechanical pre-centering means for supporting rolls and the like.
  • Italian patent no. 1,217,468 in the name of the same Applicant, assumed included herein as reference, discloses an expanding shaft for supporting rolls and the like which substantially has an elongated cylindrical body provided, on its outer surface, with multiple strips that can expand radially by virtue of the action of mutually independent pneumatic chambers.
  • the above mentioned patent uses mechanical pre-centering means obtained by means of a secondary axial shaft which is arranged inside the main shaft and is provided with frustum-shaped elements that engage pins that extend from the strips, so as to obtain, when the pressurized fluid is introduced, a radial expansion of the strips by mechanical action that allows to perfectly center the shaft with respect to the roll.
  • a principal aim of the invention is indeed to solve the above described problem by providing a pneumatically-actuated expanding shaft with mechanical pre-centering means for supporting rolls and the like which allows to provide mechanical pre-centering of the roll without requiring greater constructive complication with respect to conventional pneumatically-actuated shafts.
  • a particular object of the invention is to provide an expanding shaft in which it is possible to produce an elastic radial expansion by using directly the intrinsic elasticity characteristics of some strips, which are then kept radially expanded by pneumatic actuation.
  • Another object of the present invention is to provide a pneumatically-actuated expanding shaft which is capable of giving the greatest assurances of reliability and safety in use by virtue of its particular constructive characteristics.
  • Another object of the present invention is to provide an expanding shaft that can be easily obtained starting from commonly commercially available elements and materials and is furthermore competitive from a merely economical point of view.
  • a pneumatically-actuated expanding shaft with mechanical pre-centering means for supporting rolls and the like which comprises an elongated cylindrical body that can be inserted axially in a roll and has, on its outer surface, multiple strips which are distributed uniformly along the circumference and can expand radially by virtue of the action of pneumatic chambers, characterized in that at least three of said strips are elastically flexible to provide at least portions of their length that can expand radially by virtue of their intrinsic elasticity, so as to form regions for the mechanical pre-centering of said shaft with respect to said roll.
  • the pneumatically-actuated expanding shaft with mechanical pre-centering means for supporting rolls and the like comprises an elongated cylindrical body, generally designated by the reference numeral 1, which has, on its outer surface, multiple strips 2 which are uniformly or non-uniformly distributed along its circumference. Three strips are provided in the illustrated example, but of course their number may be changed in any way according to the requirements, and not all the strips need have mechanical pre-centering.
  • the strips 2 have a central portion 3 which protrudes from a base 4 which is wider so as to retain the strip inside guiding profiled elements 5 which are recessed in slots 6 provided correspondingly on the cylindrical body 1 of the shaft.
  • the guiding profiled elements 5 are C-shaped, with outer arms 5a that engage the wings of the base 4 to prevent the radial extraction of the strips.
  • the strips are arranged above pneumatic chambers 10 which are accommodated in the guiding profiled elements and are equipped with valves 11 that can be accessed at a distribution chamber 12 provided axially in the body 1, so that they are all mutually independent although they can all be actuated simultaneously both during the inflation of the pneumatic chambers and during their deflation.
  • the pneumatic chambers are constituted by an elastically expandable tubular element, designated by the reference numeral 10a, which is separated from the strips by a band 14 and is closed and secured, at its ends, by blocks 15 which are fixed to the body.
  • At least three of said strips 2 are elastically flexible, so as to form at least portions of their length that can expand radially by virtue of their intrinsic elasticity, so that they directly form regions for the mechanical pre-centering of the shaft with respect to the roll, which is schematically designated by the reference numeral 20.
  • said intrinsic elasticity is achieved by using strips 2 which have, along their longitudinal extension, a curved shape in which the convexity is directed towards the outside of the shaft, so that one of their portions, generally the central portion, is pushed elastically outwards.
  • the strips have, in their central portion 3, a recess 3a which runs longitudinally and has the purpose of allowing to insert square steel bars to provide better engagement, especially with steel cores.
  • pressurized fluid is introduced in the chambers 10, accordingly causing the uniform radial expansion of the entire strip or of all the strips along the length of the shaft, thus achieving firm support of the roll with respect to the shaft.
  • a shaft is provided in which the mechanical pre-centering means do not require an independent actuation of their own but are obtained by directly using an elastic deformation of the strips which, in the absence of stresses, have a curved shape with a central portion that is pushed elastically outwards and which, in the presence of the pneumatic pushing action applied by the chambers, arrange themselves in extracted position along their entire length, so as to accordingly adhere perfectly to, and lock on, the roll 20.
  • the materials employed, as well as the contingent shapes and dimensions may be any according to the requirements.

Landscapes

  • Winding Of Webs (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
EP95100854A 1994-02-01 1995-01-23 Pneumatisch betätigte Expansionswickelwelle mit mechanischer selbstzentrierender Vorrichtung Expired - Lifetime EP0665180B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI940175A IT1269710B (it) 1994-02-01 1994-02-01 Albero espandibile ad azionamento pneumatico con mezzi meccanici di precentraggio per il supporto di bobine e simili
ITMI940175 1994-02-01

Publications (3)

Publication Number Publication Date
EP0665180A2 true EP0665180A2 (de) 1995-08-02
EP0665180A3 EP0665180A3 (de) 1996-04-03
EP0665180B1 EP0665180B1 (de) 1998-09-16

Family

ID=11367717

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95100854A Expired - Lifetime EP0665180B1 (de) 1994-02-01 1995-01-23 Pneumatisch betätigte Expansionswickelwelle mit mechanischer selbstzentrierender Vorrichtung

Country Status (3)

Country Link
EP (1) EP0665180B1 (de)
DE (1) DE69504715D1 (de)
IT (1) IT1269710B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0819645A1 (de) * 1996-07-17 1998-01-21 Finsid S.r.l. Pneumatisch aufspreizbare Welle
DE10151860A1 (de) * 2001-10-24 2003-05-15 Saueressig Gmbh & Co Spannwelle, System aus Spannwelle und Hülse und Rotationsdruckmaschine sowie Verfahren zur dynamischen Stabilisierung einer Spannwelle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101602450B (zh) * 2009-07-02 2011-04-06 西南铝业（集团）有限责任公司 一种气囊式胀轴

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248716A (en) * 1940-04-20 1941-07-08 Jr George B Markle Arbor for spools or the like
EP0010266A1 (de) * 1978-10-23 1980-04-30 Giovanni Gattrugeri Durch den Druck eines Strömungsmittels aufspreizbare Vorrichtung für aufspreizbare Wellen zum Festhalten von Wickelhülsen für Papier, Kunststoff, Gewebe oder dgl. und aufspreizbare Welle, bei der solche Vorrichtungen verwendet werden
FR2632294A1 (fr) * 1988-06-02 1989-12-08 Achard Picard Jean Arbre expansible et retractable notamment pour le serrage de mandrins de bobines recevant des materiaux en bande

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248716A (en) * 1940-04-20 1941-07-08 Jr George B Markle Arbor for spools or the like
EP0010266A1 (de) * 1978-10-23 1980-04-30 Giovanni Gattrugeri Durch den Druck eines Strömungsmittels aufspreizbare Vorrichtung für aufspreizbare Wellen zum Festhalten von Wickelhülsen für Papier, Kunststoff, Gewebe oder dgl. und aufspreizbare Welle, bei der solche Vorrichtungen verwendet werden
FR2632294A1 (fr) * 1988-06-02 1989-12-08 Achard Picard Jean Arbre expansible et retractable notamment pour le serrage de mandrins de bobines recevant des materiaux en bande

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0819645A1 (de) * 1996-07-17 1998-01-21 Finsid S.r.l. Pneumatisch aufspreizbare Welle
DE10151860A1 (de) * 2001-10-24 2003-05-15 Saueressig Gmbh & Co Spannwelle, System aus Spannwelle und Hülse und Rotationsdruckmaschine sowie Verfahren zur dynamischen Stabilisierung einer Spannwelle
DE10151860B4 (de) * 2001-10-24 2004-01-29 Saueressig Gmbh & Co. Spannwelle, System aus Spannwelle und Hülse und Rotationsdruckmaschine sowie Verfahren zur dynamischen Stabilisierung einer Spannwelle

Also Published As

Publication number Publication date
IT1269710B (it) 1997-04-15
ITMI940175A0 (it) 1994-02-01
ITMI940175A1 (it) 1995-08-01
EP0665180A3 (de) 1996-04-03
DE69504715D1 (de) 1998-10-22
EP0665180B1 (de) 1998-09-16

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