EP2634128B1 - Erweiterungsdorn für Spulen - Google Patents

Erweiterungsdorn für Spulen Download PDF

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Publication number
EP2634128B1
EP2634128B1 EP12199120.2A EP12199120A EP2634128B1 EP 2634128 B1 EP2634128 B1 EP 2634128B1 EP 12199120 A EP12199120 A EP 12199120A EP 2634128 B1 EP2634128 B1 EP 2634128B1
Authority
EP
European Patent Office
Prior art keywords
inserts
liner
sleeve
profiles
hub
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.)
Not-in-force
Application number
EP12199120.2A
Other languages
English (en)
French (fr)
Other versions
EP2634128A2 (de
EP2634128A3 (de
Inventor
Carlo Scaravella
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.)
TLK Srl
Original Assignee
TLK 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 TLK Srl filed Critical TLK Srl
Priority to EP12199120.2A priority Critical patent/EP2634128B1/de
Publication of EP2634128A2 publication Critical patent/EP2634128A2/de
Publication of EP2634128A3 publication Critical patent/EP2634128A3/de
Application granted granted Critical
Publication of EP2634128B1 publication Critical patent/EP2634128B1/de
Not-in-force 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
    • B65H75/242—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages
    • B65H75/248—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages expansion caused by actuator movable in axial direction

Definitions

  • the present invention relates to an expansion gripper or chuck for supporting reels such as those used, for example, on printing machines or on laminating machines.
  • the invention relates to an expansion gripper comprising a cylindrical body provided with a plurality of elements movable radially from a position in which they are retracted inside the profile of the gripper body and a position in which they are extracted to engage the tubular support of a reel.
  • one end of the sheet to be wound is fastened to a tubular element (core) mounted on special supports which is rotated about its own axis.
  • Some of these comprise a shaft, which can be inserted into the tubular reel support, provided with an external shell produced in several separate parts, each forming a circular sector, which can translate in radial direction.
  • said sectors are movable from a retracted position, in which they are positioned close to one another, to an extracted position, in which they are pushed outward, by mechanical or pneumatic means, so as to engage the internal surface of the tubular core on which the film is wound.
  • Another type instead comprises a pair of supports, each placed at one end of the tubular core, said supports being constituted by expansion grippers provided with movable gripping elements that are extracted from the profile of the gripper to engage the internal surface of the tubular core.
  • said gripper comprises a plurality of gripping elements movable radially from a position in which they are retracted inside the profile of the gripper body to a position in which they are extracted to engage the tubular core of a reel, said elements being constituted by cylindrical inserts arranged along the circumference of the gripper body and being operated by a supporting shaft of the gripper sliding axially with respect thereto, and which has, for each series of gripping elements a truncated-cone shaped section in contact with the lower part of each insert, also shaped, so as to control extraction thereof during axial translation.
  • Extraction of said elements takes place following an external force control using electric or pneumatic actuators.
  • This configuration is preferred as it enables the maximum thrust of the actuator means to be limited, which is calculated on the basis of the thrust force that must be exerted by the gripping elements.
  • the gripper could retract when the reel is still rotating, causing problems of safety or malfunction of the machine on which it is installed.
  • these latter are provided with elastic thrust means with a degree of preload, which enable the gripping elements to engage the tubular element with the necessary force.
  • Their configuration generally provides for transformation of a movement in axial direction into a movement in radial direction, obtained by means of sliding of two inclined surfaces; however, this generates a friction force between said surfaces proportional to the preload of the elastic means.
  • DE 3339977 discloses a device for fastening a spool carrier to a shaft, comprising gripping elements which can be displaced radially outwards via rollers, said gripping elements being displaceable to a clamping position via stop surfaces for the spool carrier and being retracted by pressing on a central release button.
  • the stop surface for the spool core is designed as a concentric, axially displaceable ring, which interlocks with a support of the release button alternately in the rear clamping position and the front release position.
  • the object of the present invention is to produce a normally open expansion gripper that requires a limited force to take it from the open position to the closed position.
  • the object of the present invention is to produce an expansion gripper in which the gripping elements are moved by low friction sliding means.
  • an expansion gripper for supporting reels comprising a hollow shaft, at one end of which there is produced a hub, a sleeve mounted to slide along an axis on said hub with a first inner portion and a second outer portion, mutually coaxial, said sleeve being connected integral with a rod housed inside the shaft; a liner connected integral with the hub, provided with a plurality of through openings adapted to house inserts that act as gripping elements of the gripper, said second portion being provided with through openings adapted to house the same number of rolling means interposed between the outer surface of said hub and the lower surface of said inserts, said surfaces being provided with profiles adapted to cooperate with said rolling means to control the movement of said inserts from a closed position in which they are retracted inside the outline of the liner to an open position in which they project from said liner.
  • the gripper according to the present invention further comprises:
  • the expansion gripper indicated as a whole with 1, comprises a hollow shaft, at one end of which there is produced a hub 3, preferably with a cylindrical section, defining a cavity 4, also preferably cylindrical ( Fig.3 ).
  • Said sleeve 5 On said hub 3 there is mounted, to slide along the axis X of the shaft 2, a sleeve, indicated as a whole with 5.
  • Said sleeve 5 has two cylindrical and coaxial portions produced in two parts integral with each other, or produced in a single element.
  • said sleeve comprises a first inner portion 6 sliding in contact with the inner surface of the cavity 4 and a second outer portion 7 sliding in contact with the outer surface of the hub 3.
  • a liner 8, connected integral with the hub 3, is placed around said second outer portion 7 of the sleeve 5.
  • the second outer portion 7 of the sleeve 5 slides between the outer surface of the hub 3 and the inner surface of the liner 8.
  • Said liner 8 is provided with a plurality of through openings 9 which define the same number of seats adapted to house inserts, indicated as a whole with 10, which act as gripping elements of the gripper.
  • Said inserts 10 are movable radially, sliding in the seats 9, from a closed position, in which they retract inside the contour of the liner 8, to an open position, in which they project from said liner 8 to engage a tubular core of a reel (not shown in the figure).
  • said inserts 10 have a parallelepiped shape elongated in the direction X and tapered at the ends.
  • the upper surface of said inserts 10 is provided with knurling or the like to promote friction on the surface of the tubular core of the reel.
  • Said inserts 10 are preferably arranged on the liner 8 spaced angularly equidistant from one another and their number can vary according to the dimensions of the gripper; preferably at least 4 inserts are provided, spaced equidistant from one another by 90 degrees.
  • One feature of the invention is that of providing for movement of said inserts 10 from the closed position to the open position, and vice versa, through low friction rolling means.
  • said rolling means comprise a plurality of balls 13 adapted to cooperate with profiles 11 and 12 produced respectively on the outer surface of the hub 3 and on the lower surface of the inserts 10.
  • said profiles comprise ridges 11a and 12a, alternated with recesses 11b and 12b.
  • a plurality of adjacent incisions having a conical profile, which define said ridges and recesses.
  • the balls 13 are instead housed in the same number of through openings 14, produced in the second portion 7 of the sleeve 5.
  • said balls 13 can be in contact with the profiles 11 and 12 aligned with the ridges 11a and 12a or aligned with the recesses 11b and 12b.
  • said rolling means can comprise rollers arranged with their axis perpendicular to the axis X of the shaft 2 so as to be able to roll on said profiles 11 and 12 following translation of the second portion 7 of the sleeve 5.
  • Said translation of the second portion 7 of the sleeve 5 is controlled by a rod 15 that operates to oppose the force of elastic means, indicated with 16 in the figure.
  • said rod is integral with the first portion 6 of the sleeve 5 through which it also draws the second portion 7.
  • the elastic means 16 are instead interposed between a cover 17, connected integral with one end of the liner 8, and the bottom 18 of the first inner portion 6 of the sleeve 5.
  • said elastic means By pressing on the bottom 18 of the first portion 6, said elastic means ensure that the second portion 7 also remains in a retracted position in which the balls 13 are aligned with the ridges 11a and 12a of the profiles 11 and 12, so that the inserts 10 are projecting from the outer surface of the liner 8, i.e. in open position.
  • said elastic means 16 comprise an assembly of spring washers, positioned inside the first portion 6 of the sleeve, which ensure high rigidity and low cost.
  • said rod 15 is also provided with a stop 19 interposed between the elastic means 16 and the bottom 18 of the inner portion 6 of the sleeve 5.
  • the second portion 7 can also translate to a position in which the balls 13 are aligned with the recesses 11b and 12b of the profiles 11 and 12, and the inserts 10 can thus retract inside in the contour of the liner 8.
  • return means comprising elastic means or the like.
  • said return means 20 comprise torsion springs housed on pins 21 inserted in the liner 8 and arranged parallel to the axis X.
  • Said springs are provided with projecting ends 22 housed in seats 23 produced in the sides of the inserts 10 ( Fig. 8 ).
  • Said springs 20 are mounted with a preload so that, when the rod 15 is operated and the balls 13 are aligned with the recesses 11b and 12b, these draw the inserts 10 toward the inside of the gripper until they are taken to a position in which they are not projecting from the outer surface of the liner 8.
  • the balls 13 can roll on said profiles 11 and 12, enabling almost all of the force exerted on the rod 15 to be utilized to compress the elastic means 16.
  • the gripper thus produced normally open, can be taken to the closed position by acting on the rod 15 with a limited force, comparable with that required to operate the normally closed grippers according to the prior art.

Landscapes

  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Manipulator (AREA)
  • Moulding By Coating Moulds (AREA)

Claims (7)

  1. Ein Dehnungsgreifer zum Tragen von Rollen, umfassend:
    - eine Hohlwelle (2), an deren einem Ende eine Nabe (3) angebracht ist;
    - eine Buchse (8), die fest mit der Nabe (3) verbunden und mit einer Vielzahl von Durchgangsöffnungen (9) versehen ist, geeignet, um Einsätze (10) unterzubringen, die als Greifelemente des Greifers dienen;
    dadurch gekennzeichnet, dass er weiterhin umfasst:
    - eine Hülse (5), die so montiert ist, dass sie entlang einer Achse (X) auf besagter Nabe (3) mit einem ersten Innenabschnitt (6) und einem zweiten Außenabschnitt (7), die gegenseitig koaxial sind, gleiten, wobei besagte Hülse (5) fest mit einem Stab (15) verbunden ist, der in der Welle (2) untergebracht ist; wobei besagter zweiter Abschnitt (7) mit Durchgangsöffnungen (14) versehen ist, geeignet, um die gleiche Anzahl an Rollmitteln (13) unterzubringen, die zwischen der Außenfläche der besagten Nabe (3) und der Unterfläche der besagten Einsätze (10) eingefügt sind; wobei besagte Flächen mit Profilen (11, 12) versehen sind, geeignet, um mit besagten Rollmitteln (13) zusammenzuarbeiten, um die Bewegung der besagten Einsätze (10) von einer geschlossenen Position, in der sie sich innerhalb der Umrisse der Buchse (8) zurückziehen, zu einer offenen Position, in der sie aus der besagten Buchse (8) hervorspringen, zu kontrollieren;
    - elastische Mittel (16), die im ersten Innenabschnitt (6) der besagten Hülse (5) untergebracht sind, angeordnet zwischen einem Boden (18) des besagten ersten Abschnitts (6) und einer Abdeckung (17), die fest mit der Buchse (8) verbunden ist, wobei die elastischen Mittel (16) auf den besagten zweiten Abschnitt (7) der Hülse (5) einwirken, wobei besagte elastische Mittel den besagten zweiten Abschnitt (7) in eine Position bringen, in der die Rollmittel mit Rippen (11a, 12a) der Profile (11, 12) ausgerichtet sind, d.h. in der sich die Einsätze (10) in der offenen Position befinden; wobei besagter Stab (15) entlang der Achse (X) gleiten kann, um der Kraft der besagten elastischen Mittel (16) entgegenzuwirken, und besagten zweiten Abschnitt (7) der Hülse (5) in eine Position bringen kann, in der die Rollmittel mit Einbuchtungen (11b, 12b) der Profile (11,12) ausgerichtet sind, d.h. in der sich die Einsätze (10) in der geschlossenen Position befinden.
  2. Der Dehnungsgreifer gemäß Anspruch 1, dadurch gekennzeichnet, dass besagte Profile (11, 12), die jeweils auf der Außenfläche der besagten Nabe (3) und auf der Unterfläche der besagten Einsätze (10) angebracht sind, Rippen (11a, 12a) umfassen, die mit den Einbuchtungen (11b, 12b) abwechseln.
  3. Der Dehnungsgreifer gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass besagte Rollmittel (13) Bälle sind.
  4. Der Dehnungsgreifer gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass besagte Rollmittel (13) Rollen sind, die die mit ihren Achsen senkrecht zur Achse (X). angeordnet sind.
  5. Der Dehnungsgreifer gemäß Anspruch 3, dadurch gekennzeichnet, dass besagte Profile (11, 12) aus einer Vielzahl von nebeneinander liegenden Einschnitten von konischer Form bestehen.
  6. Der Dehnungsgreifer gemäß einem jeglichen der vorhergehenden Ansprüche von 2 bis 5, dadurch gekennzeichnet, dass Rücklaufmittel vorgesehen sind, geeignet, um ein vollständiges Zurückziehen der Einsätze (10) in die Umrisse der Buchse (8) zu ermöglichen, wenn die Rollmittel (13) mit den Einbuchtungen (11b, 12b) der Profile (11,12) ausgerichtet sind.
  7. Der Dehnungsgreifer gemäß Anspruch 6, dadurch gekennzeichnet, dass besagte Rücklaufmittel Torsionsfedern (20) umfassen, die auf Stiften (21) untergebracht sind, die in der Buchse (8) untergebracht und parallel zur Achse (X) angeordnet sind, wobei besagte Federn mit herausragenden Enden (22) versehen sind, untergebracht in den Sitzen (23), die in den Seiten der Einsätze (10) beigebracht wurden.
EP12199120.2A 2012-02-28 2012-12-21 Erweiterungsdorn für Spulen Not-in-force EP2634128B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12199120.2A EP2634128B1 (de) 2012-02-28 2012-12-21 Erweiterungsdorn für Spulen

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12157370 2012-02-28
IT000010A ITPC20120010A1 (it) 2012-02-28 2012-04-19 Pinza a espansione per bobine
EP12199120.2A EP2634128B1 (de) 2012-02-28 2012-12-21 Erweiterungsdorn für Spulen

Publications (3)

Publication Number Publication Date
EP2634128A2 EP2634128A2 (de) 2013-09-04
EP2634128A3 EP2634128A3 (de) 2014-07-09
EP2634128B1 true EP2634128B1 (de) 2019-07-24

Family

ID=46832950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12199120.2A Not-in-force EP2634128B1 (de) 2012-02-28 2012-12-21 Erweiterungsdorn für Spulen

Country Status (2)

Country Link
EP (1) EP2634128B1 (de)
IT (1) ITPC20120010A1 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US537789A (en) * 1895-04-16 Spool or mandrel
US2908452A (en) * 1955-06-15 1959-10-13 H G Weber & Company Inc Automatic expanding shaftless chuck
DE1205792B (de) * 1961-01-25 1965-11-25 Sperry Rand Corp Vorrichtung zur Befestigung eines Spulentraegers, insbesondere fuer Magnettonbaender auf einer Welle
US3472524A (en) * 1965-10-11 1969-10-14 Henry J Mansell Chuck construction
DE2815310C2 (de) * 1978-04-08 1982-06-16 Jagenberg-Werke AG, 4000 Düsseldorf Spannkopf für Wickelhülsen
US4433814A (en) * 1983-04-14 1984-02-28 Double E Company Inc. Core-engager retainer for an expansible shaft
DE3339977A1 (de) * 1983-11-04 1985-05-15 Agfa-Gevaert Ag, 5090 Leverkusen Vorrichtung zur befestigung eines spulentraegers
US6533214B1 (en) * 2000-04-25 2003-03-18 Guttin Christian Sarl Device to support and drive a winding bar or tube-shaped spindle, in order to roll or unroll bolts of fabric

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ITPC20120010A1 (it) 2013-08-29
EP2634128A2 (de) 2013-09-04
EP2634128A3 (de) 2014-07-09

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