EP3950549A1 - Pneumatischer linearstellantrieb, der an einen arm eines beweglichen arm-abwicklers anschliessbar ist - Google Patents

Pneumatischer linearstellantrieb, der an einen arm eines beweglichen arm-abwicklers anschliessbar ist Download PDF

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Publication number
EP3950549A1
EP3950549A1 EP21189608.9A EP21189608A EP3950549A1 EP 3950549 A1 EP3950549 A1 EP 3950549A1 EP 21189608 A EP21189608 A EP 21189608A EP 3950549 A1 EP3950549 A1 EP 3950549A1
Authority
EP
European Patent Office
Prior art keywords
segment
ejector
unwinder
annular cylinder
wall
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Withdrawn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
EP21189608.9A
Other languages
English (en)
French (fr)
Inventor
Stefano Lazzarin
Danilo Friggieri
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.)
RE SpA
Original Assignee
RE SpA
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 RE SpA filed Critical RE SpA
Publication of EP3950549A1 publication Critical patent/EP3950549A1/de
Withdrawn legal-status Critical Current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
    • B65H16/00—Unwinding, paying-out webs
    • B65H16/02—Supporting web roll
    • B65H16/06—Supporting web roll both-ends type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/30—Lifting, transporting, or removing the web roll; Inserting core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/12—Lifting, transporting, or inserting the web roll; Removing empty core
    • B65H19/126—Lifting, transporting, or inserting the web roll; Removing empty core with both-ends supporting arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/02—Arrangements for removing spent cores or receptacles and replacing by supply packages at paying-out stations
    • 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
    • B65H75/185—End caps, plugs or adapters
    • 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
    • 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
    • B65H2301/4134—Both ends type arrangement
    • B65H2301/41346—Both ends type arrangement separate elements engaging each end of the roll (e.g. chuck)
    • 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
    • B65H2301/417—Handling or changing web rolls
    • B65H2301/418—Changing web roll
    • B65H2301/4185—Core or mandrel discharge or removal, also organisation of core removal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2402/00—Constructional details of the handling apparatus
    • B65H2402/30—Supports; Subassemblies; Mountings thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/40—Fluid power drive; Fluid supply elements
    • B65H2406/42—Distribution circuits
    • B65H2406/423—Distribution circuits distributing fluid from stationary elements to movable element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00—Actuating means
    • B65H2555/10—Actuating means linear
    • B65H2555/11—Actuating means linear pneumatic, e.g. inflatable elements

Definitions

  • the present invention relates to a linear ejector of the type attachable to an arm of a movable arm unwinder.
  • this ejector is of pneumatic type and is used when unloading reels from self-expanding chucks, mounted to movable arm unwinders.
  • the reels may be made of paper, cardboard, corrugated cardboard and flexible sheets in general.
  • expansion units automatically protrude out of the self-expanding chucks as the supporting shaft of the unwinder is rotated and allow a reel to be retained and centered, and its weight to be supported during rotation.
  • reel unloading devices are known in the art.
  • One example of such devices is disclosed in patent application EP 3153439 A1 by Renova S.r.1.
  • This publication describes a telescopic linear actuator for movable arm unwinders, which comprises a first annular cylinder having a respective cavity, and a second annular cylinder inserted inside said cavity and able to slide relative to the first cylinder.
  • the second annular cylinder also has a respective cavity.
  • An annular piston is inserted in the cavity of the second cylinder to be able to slide relative to the second cylinder.
  • Both the cylinders and the annular piston have respective holes for the passage of a self-expanding chuck.
  • the actuator as disclosed in the Renova application is also pneumatically operable. Pneumatic operation is required due to the need, as is well known in the art, to apply forces of about 500 kg to be sure of effectively unloading the reel from the chuck. Lower forces may not be sufficient and leave the core of the reel stuck on the chuck, thereby still requiring an action by the operator.
  • linear actuator as disclosed in the Renova application is that it requires the chuck to be compatible, specifically it requires the shaft to be machined. As a result, the actuator cannot be typically mounted to a machine that doesn't have one, or the actuator cannot be combined with a chuck from another manufacturer.
  • the technical purpose of the present invention is to provide a pneumatic linear ejector of the type attachable to an arm of a movable arm unwinder that can obviate the above discussed prior art drawbacks.
  • one object of the present invention is to provide a pneumatic linear ejector of the type attachable to an arm of a movable arm unwinder, that can be adapted to any type of shaft without machining.
  • one embodiment of present invention relates to a pneumatic linear ejector of the type attachable to an arm of a movable arm unwinder for reels.
  • This ejector comprises a plurality of segments nested one in the other and slidable relative to each other. Each segment has a respective seat for the passage and/or accommodation of a chuck adapted to grasp a core of a reel.
  • the seats of the segments are coaxial and define a central axis.
  • the first segment is defined by an annular cylinder having a base that can be attached to an unwinder.
  • the ejector comprises a closing portion fixed to the first segment and closing the seat. This closing portion is configured to support the chuck.
  • the above-described ejector solves the technical problem in that the provision of the closing portion allows the ejector to be mounted even to machines that do not have one. This is because the closing portion allows the ejector to directly interface with both the shaft and the chuck, without requiring any adaptation to these two components.
  • numeral 1 designates a linear ejector of the present invention. Specifically, this ejector 1 is of the type attachable to an arm 101 of a movable arm unwinder 100 for reels 102. More specifically, the ejector 1 is of the pneumatically operated type.
  • the unwinder 100 comprises a pair of arms 101, which are vertically arranged.
  • the arms 101 are movable away from and/or toward each other, in particular driven by a motor 105.
  • the unwinder 100 comprises a horizontally arranged shaft 103.
  • This shaft 103 is connected to an upper end 101a of one of the arms 101.
  • both arms 101 Preferably, as shown in Figures 6a-6c , both arms 101 have respective shafts 103.
  • One of the shafts 103 is motorized to unwind the reel 102.
  • a chuck 104 is coaxially connected to the shaft 103 and is configured to internally grasp the core 106 of the aforementioned reel 102.
  • the unwinder 100 preferably comprises a pair of chucks 104.
  • the structure and operation of the chuck 104 are well known to the skilled person and will not be further described herein.
  • the chuck 104 as shown in the accompanying drawings is of eccentric type, which means that it comprises a cam (not shown) inserted inside a main body 108. Jaws 109 protrude out of the main body 108. As the cam is rotated relative to the main body 108 by the movement of the shaft 103, it pushes the jaws 109 outwards, thereby grasping the core 106.
  • both shafts 103 have a chuck 104, allowing both ends of the reel 102 to be grasped.
  • the chuck 104 is connected to the shaft 103 via the ejector 1. Namely, in the case of an eccentric chuck 104 like that depicted in the accompanying drawings, the ejector 1 is fixed to the shaft 103 and rotates therewith. The chuck 104 is directly fixed to the ejector, in a manner that will be further explained hereinbelow. It should be noted that the unwinder 100 as shown in Figures 6a-6c comprises a pair of ejectors 1, each coaxially connected to its respective chuck 104.
  • the ejector 1 comprises a plurality of segments 2a, 2b, 2c. These segments 2a, 2b, 2c are nested one in the other. In addition, the segments 2a, 2b, 2c slide relative to each other.
  • the segments 2a, 2b, 2c will be presented in their positioning order from the shaft 103 to the reel 102.
  • the first segment 2a is fixed to the shaft 103
  • the last segment 2c has an abutment area 7 for contact with a flange 111 of the head.
  • the ejector 1 comprises three segments 2a, 2b, 2c, with the last segment 2c being the third segment from the shaft 103.
  • the ejector 1 can have any number of segments 2a, 2b, 2c depending on the type of application and on the force to be applied to the core 106.
  • Figures 4a-4c it should be noted that the segments 2a, 2b, 2c can be alternated between an extended configuration and a retracted configuration under a pneumatic thrust. Namely, Figure 4a shows a retracted configuration of the ejector 1, Figure 4b shows an intermediate configuration, and Figure 4c shows an extended configuration.
  • the first segment 2a and the second segment 2b each have a respective seat 3 for the passage and/or accommodation of the aforementioned chuck 104. These seats 3 are arranged coaxially, thereby defining a center axis "A".
  • the first segment 2a is defined by an annular cylinder 20.
  • annular cylinder 20 has a base 21 which, as mentioned above, can be directly fixed to the shaft 103.
  • the annular cylinder 20 comprises a base 21 which is transverse, specifically perpendicular, to the center axis "A".
  • An outer wall 22 and an inner wall 23 extend away from the base 21.
  • the base 21 and the walls 22, 23 define a chamber 24 within which the second segment 2b slides.
  • the inner wall 23 of the annular cylinder 20 defines the seat 3.
  • a closing portion 25 is fixed to the inner wall 23, and extends transverse, in particular perpendicular to the inner wall 23.
  • This closing portion 25 at least partially closes the seat 3 of the first segment 2a.
  • the closing portion 25 completely closes the seat 3, and is configured to support the chuck 104. Therefore, in operation the chuck 104 is fixed to the closing portion 25.
  • the shaft 103 is also fixed to the closing portion 25.
  • the first segment 2a has a first opening 27 on said inner wall 23. It should be noted that the first opening 27 is located between the closing portion 25 and the base 21 of the annular cylinder 20, allowing it to be connected with a corresponding opening (not shown) formed on the shaft 103.
  • the first segment 2a has a plurality of first openings 27, more preferably angularly equidistant from the center axis "A". This affords pneumatic supply to the ejector 1 via the shaft 103.
  • the annular cylinder 20 may have a second opening 15.
  • This second opening 15 is particularly formed on the outer wall 22. Further details about the function of the second opening 15 will be provided hereinbelow.
  • the second segment 2b is defined by an annular piston 28 inserted in said annular cylinder 20.
  • the annular piston 28 has an outer cylindrical surface 31, which surrounds an inner cylindrical surface 32. Both cylindrical surfaces 31, 32 are coaxial with the center axis "A".
  • a bottom 34 is arranged transverse, in particular perpendicular, to the cylindrical surfaces 31, 32.
  • the bottom 34 is located inside the chamber 24 of the annular cylinder 20.
  • An outer surface 33 is arranged parallel to the bottom 34 and outside the chamber 24.
  • the annular cylinder 30 has a pair of first seals 26, arranged on the cylindrical surfaces 31, 32, to allow it to slide inside the chamber 24 under the thrust of a fluid, preferably air.
  • the annular piston 28 In operation, when pressurized air is introduced into the chamber 24, the annular piston 28 extends away from the base 21 of the annular cylinder 20.
  • the second segment 2b has a plurality of cylinders 29. Therefore, the last segment 2c is defined by a plurality of pistons 30, preferably having a cylindrical shape, each inserted in a respective cylinder 29.
  • the cylinders 29 of the second segment 2b are in angularly equally spaced arrangement relative to the center axis "A". Such cylinders 29 are located between the cylindrical surfaces 31, 32 of the annular piston 28, and in particular are accessible from the outer surface 33.
  • the last segment 2c of the ejector 1 is defined by eight pistons 30. In alternative embodiments, not shown, any number of pistons may be provided.
  • the cylinders 29 of the second segment 2b are in fluid communication with the annular cylinder 20 of the first segment 2a.
  • Each of the cylinders 29 has an open end 35, formed on the bottom 34 of the annular piston 28.
  • Each of the pistons 30 has a respective second seal 36.
  • the last segment 2c is configured to abut a flange 111 of the head, namely at a free end 30a of the pistons 30.
  • the aforementioned abutment area 7 is defined by the free ends 30a of all the pistons 30.
  • the present invention also relates to a kit comprising the ejector 1 and an adapter 37.
  • This adapter 37 has the function of allowing the ejector 1 to be mounted even on shafts 103 that have no pneumatic supply.
  • the adapter 37 has an annular cavity 17 which, in operation, may be supplied by a source of pressurized fluid, for example air.
  • the annular cavity 17 is configured to be positioned outside the first segment 2a of the ejector 1, namely at the above discussed second opening 15 of the annular cylinder 20, to be able to pneumatically supply the annular cylinder 20 from the outside.
  • the adapter 37 has an outer cylindrical wall 39, which remains stationary in operation. This outer cylindrical wall 39 can be connected to the pneumatic supply.
  • the adapter 37 comprises a pair of sealing rings 38, which can be associated with the outer wall 22 of the annular cylinder 20. These sealing rings 38, with the outer cylindrical wall 39, define the aforementioned annular cavity 16. In a first embodiment of the invention, as shown for example in Figures 4a-4c , the adapter 37 does not comprise additional walls between the sealing rings 38 and the outer wall 22 of the annular cylinder 20.
  • the adapter 37 optionally comprises an inner cylindrical wall 41 which can be fixed to the annular cylinder 20, in particular to the outer wall 22.
  • the inner cylindrical wall of the adapter 37 rotates with the annular cylinder 20 driven by the shaft 103 and has at least one opening 42 that can be positioned at the aforementioned second opening 15 of the annular cylinder 20.
  • this embodiment may be used with any pneumatic linear actuator or ejector, possibly other than the ejector 1, as long as the above discussed second opening 15 has been formed therein.
  • the adapter 37 comprises a bearing 40.
  • the bearing 40 is arranged between the outer cylindrical wall 39 of the adapter 37 and the outer wall 22 of the annular cylinder 20.
  • the bearing 40 is arranged between the outer cylindrical wall 39 and the inner cylindrical wall 41 of the adapter 37.

Landscapes

  • Replacement Of Web Rolls (AREA)
  • Manipulator (AREA)
EP21189608.9A 2020-08-07 2021-08-04 Pneumatischer linearstellantrieb, der an einen arm eines beweglichen arm-abwicklers anschliessbar ist Withdrawn EP3950549A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102020000019768A IT202000019768A1 (it) 2020-08-07 2020-08-07 Espulsore pneumatico lineare del tipo collegabile ad un braccio di uno svolgitore a bracci mobili

Publications (1)

Publication Number Publication Date
EP3950549A1 true EP3950549A1 (de) 2022-02-09

Family

ID=72886074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21189608.9A Withdrawn EP3950549A1 (de) 2020-08-07 2021-08-04 Pneumatischer linearstellantrieb, der an einen arm eines beweglichen arm-abwicklers anschliessbar ist

Country Status (3)

Country Link
US (1) US20220041393A1 (de)
EP (1) EP3950549A1 (de)
IT (1) IT202000019768A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000019849A1 (it) * 2020-08-10 2022-02-10 Renova S R L Mandrino di supporto per bobine di materiale avvolgibile

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4715553A (en) * 1985-09-02 1987-12-29 Kabushikigaisha Tokyo Kikai Seisakusho Roll core holding device
CN204588200U (zh) * 2015-05-11 2015-08-26 朝阳三创新产品制造有限公司 伸缩式气涨轴一体卷取机
EP3153439A1 (de) 2015-10-09 2017-04-12 Renova S.r.l. Teleskopischer druckluftlinearaktuator, insbesondere für abwickler mit beweglichen armen
WO2019102343A1 (en) * 2017-11-21 2019-05-31 Re S.P.A. - Controlli Industriali Telescopic linear actuator of a type connectable to an arm of a movable arm unwinder

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Publication number Priority date Publication date Assignee Title
US3088688A (en) * 1958-09-25 1963-05-07 H G Weber And Company Inc Hydraulic system
US3157405A (en) * 1963-01-30 1964-11-17 Robert W Hafemeister Chuck
GB1524967A (en) * 1974-11-13 1978-09-13 Sissons A J Roll-handling equipment
US4281842A (en) * 1980-03-21 1981-08-04 Martin Daniel P Inner diameter chuck
US5441284A (en) * 1994-03-01 1995-08-15 General Manufacturing Systems, Inc. Fluid operated chuck and methods of operation
ES2137815B1 (es) * 1996-08-06 2000-08-16 Conos Segura Palenzuela S L Cono expansible para sujecion de bobinas.
DE102005021077A1 (de) * 2005-05-06 2006-11-09 Kampf Gmbh & Co Maschinenfabrik Spannkopf für eine Rollenschneid- und Wickelmaschine
IT202000019792A1 (it) * 2020-08-07 2022-02-07 Re S P A Controlli Ind Kit di installazione per un espulsore pneumatico lineare del tipo collegabile ad un braccio di uno svolgitore a bracci mobili
IT202000019849A1 (it) * 2020-08-10 2022-02-10 Renova S R L Mandrino di supporto per bobine di materiale avvolgibile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4715553A (en) * 1985-09-02 1987-12-29 Kabushikigaisha Tokyo Kikai Seisakusho Roll core holding device
CN204588200U (zh) * 2015-05-11 2015-08-26 朝阳三创新产品制造有限公司 伸缩式气涨轴一体卷取机
EP3153439A1 (de) 2015-10-09 2017-04-12 Renova S.r.l. Teleskopischer druckluftlinearaktuator, insbesondere für abwickler mit beweglichen armen
WO2019102343A1 (en) * 2017-11-21 2019-05-31 Re S.P.A. - Controlli Industriali Telescopic linear actuator of a type connectable to an arm of a movable arm unwinder

Also Published As

Publication number Publication date
US20220041393A1 (en) 2022-02-10
IT202000019768A1 (it) 2022-02-07

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