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EP4253293B1 - Device for grabbing and rotating a roll core - Google Patents

Device for grabbing and rotating a roll core Download PDF

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Publication number
EP4253293B1
EP4253293B1 EP23164252.1A EP23164252A EP4253293B1 EP 4253293 B1 EP4253293 B1 EP 4253293B1 EP 23164252 A EP23164252 A EP 23164252A EP 4253293 B1 EP4253293 B1 EP 4253293B1
Authority
EP
European Patent Office
Prior art keywords
hollow shaft
electric motor
mandrel
rotating
support
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.)
Active
Application number
EP23164252.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP4253293A1 (en
Inventor
Matteo RIVA
Valeria GARELLA
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.)
Beta SRL
Original Assignee
Beta 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 Beta SRL filed Critical Beta SRL
Publication of EP4253293A1 publication Critical patent/EP4253293A1/en
Application granted granted Critical
Publication of EP4253293B1 publication Critical patent/EP4253293B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65H75/241—Constructional details adjustable in configuration, e.g. expansible axially adjustable reels or bobbins
    • B65H75/2413—Constructional details adjustable in configuration, e.g. expansible axially adjustable reels or bobbins adjustable by threaded means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/28—Traversing devices; Package-shaping arrangements
    • B65H54/2803—Traversing devices; Package-shaping arrangements with a traversely moving package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40—Arrangements for rotating packages
    • B65H54/54—Arrangements for supporting cores or formers at winding stations; Securing cores or formers to driving members
    • B65H54/543—Securing cores or holders to supporting or driving members, e.g. collapsible mandrels
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/413—Supporting web roll
    • B65H2301/4132—Cantilever arrangement
    • B65H2301/41324—Cantilever arrangement linear movement of roll support
    • B65H2301/413243—Cantilever arrangement linear movement of roll support parallel to roll axis

Definitions

  • a device for grabbing and rotating a roll core is described below.
  • the material so wound can then be unwound, at a later stage.
  • the support cores used to create and support these windings or rolls are also known as “cores”, “drums” or “spools”.
  • These roll support cores comprise an elongated hollow body, for example a generally tubular body, around which the flexible material is wound.
  • these support cores can also comprise a pair of parallel elements, generally in the shape of a circular crown, joined to the ends of the generally tubular body (the so-called “flanges") which delimit the space within which the material can be wound.
  • These devices comprise an expanding mandrel, also commonly known as the "expanding shaft”, which is mounted on a shaft, usually connected to an electric motor, or a clutch or a brake (for regulating the speed of rotation of the mandrel).
  • the roll support core is fitted onto the expanding mandrel and locked therein by means of radially movable elements, also known as clamps or "strips".
  • Devices are also known for grabbing and rotating a horizontal axis support core allowing, at the same time, manual axial regulation of the mandrel, when the machine is stationary or even during rotation.
  • US 2017/334676 discloses a device for grabbing and rotating a roll core according to the preamble of claim 1.
  • the aim of the inventors is to at least partially solve the problems of the prior art and, in particular, the above-mentioned problems.
  • a device for grabbing and rotating a roll core 10 around a horizontal rotation axis X is indicated as a whole with reference number 1.
  • the device 1 comprises an expanding mandrel 3, adapted to rotate around a horizontal axis X, which is bound to a bearing hollow shaft 2.
  • winding and “roll” can be considered synonymous and indicate the material wound around the core 10.
  • the support core 10 is also known in jargon simply as the “core” or as the “support structure”, “drum” or “spool”.
  • the core 10 can be a conventional support structure which comprises a tubular body in which the expanding mandrel 3 of the device 1 is inserted.
  • the device 1 comprises a bearing hollow shaft 2 (hereinafter also referred to only as the hollow shaft or shaft) which extends along a horizontal rotation axis X.
  • a bearing hollow shaft 2 hereinafter also referred to only as the hollow shaft or shaft
  • the hollow shaft 2 comprises a first end 21 and a second end 22, opposite the first end 21.
  • the hollow shaft 2 is crossed, along its entire length, by an axial bore 23.
  • the hollow shaft 2 can be made, for example, of steel.
  • the device 1 comprises a support 4 for the hollow shaft 2.
  • the support 4 comprises one or more roller bearings 41, 42.
  • the support member 4 comprises two roller bearings 41, 42 housed in a barrel 40.
  • the barrel 40 is rigidly joined to an external support structure 400, also known in jargon as the "machine shoulder” or, more simply, the "shoulder".
  • the shoulder 4 can comprise two plate-like elements 401, 402 (for example two plate-like steel elements) parallel to each other, extending on a plane orthogonal to the rotation axis X of the hollow shaft 2.
  • the barrel 40 is adapted to be housed (or partially housed) in a seat obtained in the shoulder 4.
  • the barrel 40 can be bound to the shoulder 400 by means of connecting elements which comprise threaded elements.
  • the expanding mandrel 3 comprises a first end 371 and a second end 372, opposite to the first end 371.
  • the mandrel 3 comprises a hollow body 30, having a through bore 38 adapted to receive a portion of the hollow shaft 2.
  • the elongated hollow body 30 of the expanding mandrel 3 has an approximately cylindrical or prismatic shape and can be made, for example, of aluminium alloy.
  • the expanding mandrel 3 jointly rotates with the hollow shaft 2 but is capable to translate relative to the hollow shaft 2.
  • the rotation of the mandrel 3 allows to carry out (depending on the direction of rotation) the winding or unwinding operation of the flexible material on the core 10.
  • the rotation of the mandrel 3 can be obtained, for example, by applying a driving torque to the shaft 2.
  • the rotation of the mandrel 3 can also be obtained by applying a driving torque to the support 10 (for example by pulling the wound material).
  • the mandrel 3 and the shaft 2 can be mechanically connected, for example, by means of a connecting pin 39, screwed into a radial bore made in the body 30 of the mandrel 3, the head of which is inserted in a groove 29 made on the outer surface of the hollow shaft 2.
  • the groove 29 extends axially, that is to say parallel to the extension axis X of the hollow shaft 2.
  • a certain mandrel 3 sliding range relative to the hollow shaft 2 is thus allowed, that is to say along the axis X (which range depends on the longitudinal dimensions of the groove 29 and the transverse dimensions of the head of the pin 39).
  • the expanding mandrel 3 jointly rotates with the hollow shaft 2 but is capable to translate relative to the latter parallel to the rotation axis X.
  • the expanding mandrel 3 is a conventional air-operated mandrel (better described below).
  • a head 15 (also known in jargon as a "knob") is also provided which extends along the X axis and is adjacent to one end 372 of the expanding mandrel 3 (the free end on which the support 10 is inserted).
  • the end 22 of the hollow shaft 2 faces the head 15.
  • the head 15 can have a substantially and / or generally tapered cross section (decreasing as it moves away from the mandrel 3).
  • This kind of head 15 facilitates the assembly operations of the core 10 on the body 30 of the mandrel 3.
  • the device 1 is equipped with a rotary electric motor 7 (hereinafter also simply referred to as an electric motor) and a mechanical transmission 6, better described below, to move the mandrel 3 and the head 15 axially relative to the hollow shaft 2.
  • a rotary electric motor 7 hereinafter also simply referred to as an electric motor
  • a mechanical transmission 6 better described below
  • the motor 7 is a rotary electric motor with an external stator and an internal rotor.
  • the motor 7 comprises a shaft 71 which controls the mechanical transmission 6.
  • the motor 7 is a stepper motor, that is to say a synchronous electric motor, without brushes, operating with pulsed direct current.
  • An electronic regulator 70 (for example a PWM regulator) is then provided for generating the pulsed direct current necessary to regulate: the starting, stopping and the direction of rotation of the stepper motor 7.
  • control apparatus 72 is provided for manually controlling the regulator 70, in particular for controlling the start, stop and the direction of rotation of the electric motor 7.
  • Electric control wires 73 are also provided which connect the control apparatus 72 to the regulator 70 of the stepper motor 7.
  • the term "manually operated” comprises a control apparatus that can be operated with a finger, in particular an apparatus which comprises one or more control keys.
  • control key, or keys, of the control apparatus 72 can be positioned on the end of the head 15.
  • the manually operated control apparatus 72 can comprise, for example, a four-contact inverter, to control the operation of the electric motor 7 in both directions of rotation.
  • the manually operated control apparatus 72 can comprise conventional mechanical members for opening / closing the electric contacts.
  • the electrical contacts can be opened and closed by means of conventional solid state elements.
  • a support member 9 is provided for connecting the electric motor 7 to an external support structure 400, for example to the shoulder 400.
  • This support member 9 of the electric motor 7 can comprise a coupling spider 91 rigidly joined to the external support structure 400.
  • the mechanical transmission 6 which converts the rotation of the electric motor 7 into an axial movement of the expanding mandrel 3 comprises an axially sliding tube 61, passing through the bore 23 of the hollow shaft 2.
  • the sliding tube 61 comprises a through bore 610, a first end 611 (facing the motor 7) and a second end 612 (facing the head 15), opposite to the first end.
  • the tube 61 slides axially relative to the hollow shaft 2 but does not jointly rotate with the hollow shaft 2.
  • the tube 61 jointly translates but not jointly rotates with the expanding mandrel 3.
  • the control apparatus 72 is mounted to the head 15 which jointly translates but not jointly rotates with the expanding mandrel 3.
  • the mechanical transmission 6 can comprise, for example, a conventional nut-and-screw mechanism 60 or a conventional ball screw mechanism.
  • the nut-and-screw or ball screw mechanism 60 is housed inside the spider 91.
  • a second support 5 is provided for the hollow shaft 2, having at least one roller bearing 51.
  • the second support 5 binds one end 21 of the hollow shaft 2 (the end facing the motor 7).
  • the support 5 can be mechanically connected to the shoulder 400 by means of threaded elements.
  • a support member 45, 46 of the body 30 of the mandrel 3 is mounted to the end 612 of the sliding tube 61.
  • This support member 45, 46 comprises a hollow element 45 which is inserted in the sliding tube 61 and is rigidly joined to the sliding tube 61.
  • the hollow member 45 can have a shape, approximately, of a rotating solid.
  • the hollow element 45 and the sliding tube 61 can be mechanically connected, for example, by means of at least one connecting pin 451, screwed into a radial bore made in the hollow element 45, the head of which is inserted in a groove 618 made on the outer surface of the sliding tube 61.
  • the support member 45, 46 further comprises a roller bearing 46 with an internal ring inserted on the hollow element 45 and rigidly joined thereto.
  • the roller bearing 46 is bound to the hollow element 45 by means of a Seeger ring and bound to the elongated hollow body 30 by means of screw elements (cone point socket).
  • the head 15 is also rigidly joined to the hollow element 45; this solution allows the head 15 not to rotate while the mandrel 3 is being rotated.
  • the mandrel 3 is an air-operated mandrel and is fed with pressurized air through a plurality of inlet radial bores 33, 33, 33, 33, 33, 33 distributed circumferentially and in communication with the surface of the through bore 38 of the hollow body 30.
  • the pressurized air intended to control the expansion of the clamps of the mandrel 3, passes through a portion of the sliding tube 61, passes into a first chamber 812, defined inside the hollow shaft 2, then arrives in a second chamber 834, defined inside the through bore 38 of the hollow body 30, and finally enters the inlet radial bores 33, 33, 33, 33, 33, 33 of the mandrel 3.
  • the compressed air flows into the sliding tube 61, through a first radial bore or inflow bore 613, positioned near the first end 611 of the tube 61, passes through a portion of the sliding tube 61, and flows out through a second radial bore or outflow bore 614, in the first chamber 812.
  • the first chamber 812 is delimited: by the inner surface of the through bore 23 of the hollow shaft 2, by the outer surface of the sliding tube 61 and by seal elements 81, 82 interposed between the inner surface 23 of the hollow shaft 2 and the outer surface of the sliding tube 61.
  • the seal elements 81, 82 can be static seals, for example lip seals, distributed along the rotation axis X, which define the longitudinal ends of the chamber 812.
  • the lip seals 81, 82 can be housed in annular groves made inside the axial bore 23 of the hollow shaft 2.
  • the lip seals are arranged symmetrically.
  • the second chamber 834 is delimited by the outer surface of the hollow shaft 2, by the inner surface of the bore 38 of the hollow element 30, and by seal elements 83, 84 interposed between the outer surface of the hollow shaft 2 and the inner surface of the through bore 38 of the hollow body 30.
  • the device 1 comprises a pair of seal elements 83, 84, distributed along the rotation axis X, which define the longitudinal ends of the chamber 834.
  • the pneumatic communication between the first chamber 812 and the second chamber 834 is ensured by an outlet radial bore 24 made in the wall of the hollow shaft 2.
  • the seal elements 83, 84 which define the second chamber 834 can comprise static seals, for example o-rings which are housed in annular grooves made inside the outer surface of the hollow shaft 2.
  • the elongated hollow body 30 of the mandrel 3 has a plurality of outer or hollow grooves 35, 35, 35, 35, 35 arranged radially around the axis X.
  • a plurality of elongated clamps or "strips" 31, 31, 31, 31, 31 are also provided, which are arranged radially around the rotation axis X and housed in the grooves 35, 35, 35, 35, 35.
  • the clamps 31, 31, 31,31,31 of the mandrel 3 are radially movable between a first position, or radially contracted position (to release the roll core 10) and a second position, or radially expanded position (to lock the roll core).
  • the expansion movement of the clamps 31, 31, 31, 31, 31 is pneumatically controlled, by means of the expansion of as many inner tubes 32, 32, 32, 32, 32 in the shape of a flat tubular, housed inside the grooves 35, 35, 35, 35, 35 under the clamps 31, 31, 31, 31, 31.
  • the inner tubes 32, 32, 32, 32, 32, 32 are supplied with compressed air arriving from the tube 834 through radial bores 33, 33, 33, 33, 33, 33, 33 (distributed circumferentially) which pneumatically connect the grooves 35, 35, 35, 35, 35 to the axial through bore 38 of the elongated hollow body 30.
  • a cable sleeve 74 is included, which is inserted in the sliding tube 61 and is rigidly joined to the latter.
  • the cable sleeve 74 houses the electric wires 73 used for connecting the control apparatus 72 to the regulator 70 of the electric motor 7.
  • the cable sleeve 74 pneumatically separates the electric wires 73 from the through bore 610 by means of the seal elements 85, 86.
  • control wires 73 shall remain separate from the pressurized areas avoiding the problems of commercial airtight cable sleeves.
  • the expanding mandrel cannot be of the mechanically operated type.
  • the device 1 can comprise a rotating member 200 which jointly rotates and translates with the hollow shaft 2 to apply a driving torque or a resistant torque to the latter.
  • This rotating member 200 can be, for example, a pulley (as in the illustrated example) or a disc of a mechanical brake (not shown).
  • the rotating member 200 can be positioned, for example, between the shoulder 400 and the second shaft support 5.
  • the coupling spider 91 can include an opening 911 to allow the sliding tube 61 to be connected to a compressed air source (not shown) as well as to allow the passage of the electric cables to power the regulator 70.
  • the coupling spider 91 is mechanically fastened to the second shaft support 5, for example by means of threaded elements.

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EP23164252.1A 2022-03-28 2023-03-27 Device for grabbing and rotating a roll core Active EP4253293B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202200006005 2022-03-28

Publications (2)

Publication Number Publication Date
EP4253293A1 EP4253293A1 (en) 2023-10-04
EP4253293B1 true EP4253293B1 (en) 2024-06-19

Family

ID=82020285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23164252.1A Active EP4253293B1 (en) 2022-03-28 2023-03-27 Device for grabbing and rotating a roll core

Country Status (3)

Country Link
EP (1) EP4253293B1 (pt)
ES (1) ES2992020T3 (pt)
PT (1) PT4253293T (pt)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3067304B1 (de) * 2015-03-09 2017-05-24 Georg Sahm GmbH & Co. KG Spulmaschine
IT201900013224A1 (it) * 2019-07-29 2021-01-29 Beta S R L Dispositivo per bloccare e porre in rotazione una struttura di supporto per una bobina con regolazione motorizzata dell'allineamento della struttura di supporto durante la rotazione della stessa

Also Published As

Publication number Publication date
ES2992020T3 (es) 2024-12-05
EP4253293A1 (en) 2023-10-04
PT4253293T (pt) 2024-09-30

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