• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Method and apparatus for releasing a metallic binding element (10’) from a sheet metal roll (1), wherein an axial sheet metal edge (8) extends axially across the envelope surface (3) of the sheet metal roll, and wherein the binding element is secured to the sheet metal roll with pre-tension. The location of said axial sheet metal edge (8) or one or more axially protruding sheet metal edges at one of the gables of the sheet metal roll and the location of the binding element are detected to thereby establishing the location of a place where the binding element projects over a sheet metal edge under the formation of a gap (13’) between the binding element and the sheet metal roll. A laser beam (23) is focused onto a part (15’) of the binding element located above said gap in order to locally heat this part and thereby induce breakage of the binding element.(Fig 4)
    公开号:SE1651054A1
    申请号:SE1651054
    申请日:2016-07-13
    公开日:2018-01-14
    发明作者:Englund Ove；Danielsson Erik；Mårstedt Peter
    申请人:Sund Birsta Ab；
    IPC主号:
    专利说明:

    Method and apparatus for releasinq a bindinq elementin the form of a metallic strap from a sheet metal rollFIELD OF THE INVENTION AND PRIOR ARTThe present invention relates to a method according to thepreamble of claim 1 and an apparatus according to the preambleof claim 7 for releasing an elongated binding element in the formof a metallic strap from a roll formed of wound sheet metal.
    Sheet metal of steel or other metallic material obtained from arolling mill is conventionally wound into a cylindrical roll. Astrapping machine may be used for applying a binding element inthe form of a strap of metallic material in a loop around the sheetmetal roll, drawing the binding element tightly around the sheetmetal roll and thereafter joining overlapping sections at the endsof the binding element in order to secure the binding elementaround the sheet metal roll and thereby prevent the sheet metalfrom being unwound from the sheet metal roll during storage andtransportation thereof. Several such binding elements may besecured to the sheet metal roll at a distance from each other.Before using the sheet metal, it is necessary to release thebinding elements from the sheet metal roll. This can of course bedone manually with the assistance of a suitable cutting tool.However, the binding elements are normally tied very tightly tothe sheet metal roll and are often secured to the sheet metal rollwith high pre-tension, which makes it difficult to cut the bindingelements manually and which also makes it dangerous for aperson to be in the vicinity of the sheet metal roll at the momentwhen a binding element is cut off. Thus, there is a need for aconvenient and safe manner of releasing a pre-tensioned bindingelement from a sheet metal roll.
    SUMMARY OF THE INVENTIONThe object of the present invention is to achieve a new andfavourable manner of releasing a pre-tensioned binding elementin the form of a metallic strap from a sheet metal roll.
    According to the invention, this object is achieved by means of amethod having the features defined in claim 1 and an apparatushaving the features defined in claim 7.
    According the invention, the location of an axial sheet metal edgeextending axially across the envelope surface of the sheet metalroll or the location of one or more axially protruding sheet metaledges at one of the gables of the sheet metal roll and thelocation of a binding element are detected to thereby establishthe location of a place where the binding element projects over asheet metal edge under the formation of a gap between thebinding element and the sheet metal roll. A laser beam is thenfocused onto a part of the binding element located above saidgap in order to locally heat this part of the binding element andthereby induce breakage of the binding element. By means of thelaser beam, it will be possible to achieve a very rapid and strongheating of a restricted and well-defined area on the bindingelement. By choosing a heating area located on a part of thebinding element where the binding element is out of contact withthe sheet metal roll, i.e. where there is a gap between thebinding element and the sheet metal roll, the desired heating ofthe binding element may be achieved without causing heatingdamages to the sheet metal of the sheet metal roll. The tensilestrength of the metallic binding element at the heated area isreduced as the temperature thereof increases, and when theheated area has reached a sufficiently high temperature thebinding element will break at the heated area under the effect ofthe pre-tension in the binding element. Thus, the binding elementmay hereby be released from the sheet metal roll in a rapid andsafe manner without damaging the sheet metal of the sheet metalroll.
    Further advantages as well as advantageous features of themethod and apparatus according to the present invention willappear from the dependent claims and the following description.
    BRIEF DESCRIPTION OF THE DRAWINGSWith reference to the appended drawings, a specific descriptionof preferred embodiments of the invention cited as examplesfollows below. ln the drawings:Fig 1 is a schematic perspective view of a sheet metal rollprovided with four axially arranged binding elements,Fig 2 is a schematic view of a part of the sheet metal roll ofFig 1 and a laser unit used for releasing the bindingelements from the sheet metal roll,Fig 3 is a schematic perspective view of a sheet metal rollprovided with two circumferentially arranged bindingelements,Fig 4 is a schematic view of a part of the sheet metal roll ofFig 3 and a laser unit used for releasing the bindingelements from the sheet metal roll, andFig 5 is an outline diagram of parts included in an apparatusaccording to an embodiment of the present invention.
    DETAILED DESCRIPTION OF EMBODIMENTS OF THEINVENTIONFig 1 and Fig 3 schematically illustrate a roll 1 formed of woundsheet metal 2. The sheet metal roll 1 has an essentiallycylindrical envelope surface 3, an essentially cylindrical innersurface 4 and two opposite annular gables 5. A through hole 6extends between the gables 5 of the sheet metal roll 1 along thecentre axis of the sheet metal roll, wherein said inner surface 4constitutes the wall of this through hole 6. An edge 8 at the outerend of the wound sheet metal 2, i.e. at the sheet metal endlocated at the outer periphery of the sheet metal roll 1, extendsaxially across the envelope surface 3 of the sheet metal roll 1.
    The sheet metal roll 1 is provided with at least one bindingelement 10, 10' in the form of a strap of metallic material, forinstance steel.
    The sheet metal roll 1 illustrated in Fig 1 is provided with fourbinding elements 10 distributed about the centre axis of thesheet metal roll, wherein each binding element 10 extendsthrough the through hole 6 and is axially arranged around thesheet metal roll 1 in contact with the envelope surface 3, theinner surface 4 and the gables 5 thereof. The binding elements10 are secured to the sheet metal roll 1 with pre-tension so as toprevent the sheet metal 2 from being unwound from the sheetmetal roll 1 during storage and transportation of the sheet metalroll. Each binding element 10 is tightly tied to the sheet metal roll1 and may be secured to the sheet metal roll 1 in a conventionalmanner, for instance by a sealed or sealless joint formed inmutually overlapped sections at the ends of the binding element10. The number of binding elements 10 may of course vary independence on the size of the sheet metal roll 1.
    Different sheet metal layers 11 in the sheet metal roll 1 may besomewhat offset in relation to each other, normally a fewmillimetres, in the axial direction of the sheet metal roll, asschematically illustrated in Fig 2. Thus, there will be severalaxially protruding sheet metal edges 12 with intermediate valleysat each gable 5 of the sheet metal roll 1. As illustrated in Fig 2,each binding element 10 projects over these sheet metal edges12 under the formation of gaps 13 between the binding element10 and the gable 5 of the sheet metal roll 1.
    When a binding element 10 of the above-mentioned type is to bereleased from a sheet metal roll 1 of the type illustrated in Fig 1,the location of one or more axially protruding sheet metal edges12 at one of the gables 5 of the sheet metal roll 1 and thelocation of the binding element 10 are detected to therebyestablish the location of the place where the binding element 10projects over an axially protruding sheet metal edge 12 at thisgable 5 of the sheet metal roll 1 under the formation of a gap 13between the binding element 10 and this gable 5 of the sheetmetal roll, whereupon a laser beam 23 is focused onto a part 15of the binding element located above said gap 13 in order tolocally heat this part 15 of the binding element and therebyinduce breakage of the binding element 10.
    The sheet metal roll 1 illustrated in Fig 3 is provided with twobinding elements 10' secured to the sheet metal roll 1 in parallelwith and at a distance from each other, wherein each bindingelement 10' is circumferentially arranged around the sheet metalroll 1 in contact with the envelope surface 3 thereof so as tocross the above-mentioned axial sheet metal edge 8. The bindingelements 10' are secured to the sheet metal roll 1 with pre-tension so as to prevent the sheet metal 2 from being unwoundfrom the sheet metal roll 1 during storage and transportation ofthe sheet metal roll. Each binding element 10' encircles the sheetmetal roll 1 in the circumferential direction thereof and is tightlytied to the envelope surface 3 of the sheet metal roll 1. Eachbinding element 10' may be secured to the sheet metal roll 1 in aconventional manner, for instance by a sealed or sealless jointformed in mutually overlapped sections at the ends of the bindingelement 10”. The number of binding elements 10' may of coursevary in dependence on the size of the sheet metal roll 1.
    As illustrated in Fig 4, each binding element 10' projects over theaxial sheet metal edge 8 under the formation of a gap 13'between the binding element 10' and the envelope surface 3 ofthe sheet metal roll 1, wherein the size of this gap 13' dependson the thickness of the sheet metal 2.
    When a binding element 10' of the above-mentioned type is to bereleased from a sheet metal roll 1 of the type illustrated in Fig 3,the location of the axial sheet metal edge 8 and the location ofthe binding element 10' are detected to thereby establish thelocation of the place where the binding element 10' projects overthe axial sheet metal edge 8 under the formation of a gap 13'between the binding element 10' and the envelope surface 3 ofthe sheet metal roll 1, whereupon a laser beam 23 is focusedonto a part 15' of the binding element located above said gap 13'in order to locally heat this part 15' of the binding element andthereby induce breakage of the binding element 10'.
    Parts included in an apparatus 20 according to an embodiment ofthe present invention are very schematically illustrated in theoutline diagram of Fig 5. The apparatus 20 is to be used forreleasing binding elements 10, 10' of the above-mentioned typesfrom a sheet metal roll 1. The apparatus 20 comprises adetection device 21 for detecting the location of the axial sheetmetal edge 8 or one or more axially protruding sheet metal edges12 and the location of a binding element 10, 10' on a sheet metalroll 1 positioned in the working area of the apparatus 20, whereinthe detection device 21, based on the detected location of saidsheet metal edge or edges 8, 12 and the detected location of thebinding element 10, 10' is configured to establish the location ofthe place where the binding element 10, 10' projects over a sheetmetal edge 8, 12 under the formation of a gap 13, 13' betweenThedetection device 21 may comprise a vision system or one or morethe binding element 10, 10' and the sheet metal roll 1.ultrasonic sensors for detecting the location of said sheet metaledge or edges 8, 12 and the location of the binding element 10,10”. As a further alternative, the detection device 21 maycomprise one or more contact sensors for detecting the locationof said sheet metal edge or edges 8, 12 and the location of thebinding element 10, 10', wherein the respective contact sensor ismoved over a gable 5 or the envelope surface 3 of the sheetmetal roll 1 and configured to emit a signal when it comes intocontact with a sheet metal edge 8, 12 or the binding element 10,10”. The detection device 21 may also comprise any othersuitable type of sensors for detecting the location of said sheetmetal edge or edges 8, 12 and the location of the bindingelement 10, 10”.
    The apparatus 20 further comprises a laser unit 22 for emitting alaser beam 23 and an electronic control unit 24. The laser unit 22comprises means of conventional type for directing and focusingthe emitted laser beam 13 onto a desired target area. Theelectronic control unit 24 is connected to the detection device 21in order to receive information from the detection device as to thelocation of the place where the binding element 10, 10' projectsover a sheet metal edge 8, 12 under the formation of a gap 13,13' between the binding element 10, 10' and the sheet metal roll1. The electronic control unit 24 is also connected to the laserunit 22 and configured to control the above-mentioned beamdirecting and focusing means of the laser unit to direct and focusthe laser beam 23 of the laser unit onto a part 15, 15' of thebinding element located above said gap 13, 13' in order to locallyheat this part 15, 15' of the binding element under the effect ofthe laser beam 23 to such a temperature that breakage of thebinding element 10, 10' is induced.
    The invention is of course not in any way restricted to theembodiments described above. On the contrary, manypossibilities to modifications thereof will be apparent to a personwith ordinary skill in the art without departing from the basic ideaof the invention such as defined in the appended claims.
    权利要求:
    Claims (10)
    [1] 1. A method for releasing an elongated binding element (10; 10') in the form of a metallic strap from a roll (1) formed of woundsheet metal (2), the sheet metal roll (1) having an essentiallycylindrical envelope surface (3), an essentially cylindricalinner surface (4) and two opposite annular gables (5), whereinan axial sheet metal edge (8) at an end of the wound sheetmetal (2) extends axially across the envelope surface (3) ofthe sheet metal roll (1), and wherein the binding element (10;10') is secured to the sheet metal roll (1) with pre-tension,characterized in that the method comprises the steps of: A) detecting the location of said axial sheet metal edge (8) orone or more axially protruding sheet metal edges (12) at oneof the gables (5) of the sheet metal roll (1) and the location ofthe binding element (10; 10') to thereby establishing thelocation of a place where the binding element (10; 10')projects over a sheet metal edge (8; 12) under the formationof a gap (13; 13') between the binding element and the sheetmetal roll (1); and B) focusing a laser beam (23) onto a part (15; 15') of thebinding element located above said gap (13; 13') in order tolocally heat this part (15; 15') of the binding element andthereby induce breakage of the binding element (10; 10').
    [2] _ A method according to claim 1, wherein the binding element (10') is circumferentially arranged around the sheet metal roll(1) in contact with the envelope surface (3) thereof so as tocross said axial sheet metal edge (8), characterized in that the location of said axial sheet metal edge (8) and the location 11 of the binding element (10') are detected in step A to therebyestablish the location of the place where the binding element(10') projects over the axial sheet metal edge (8) under theformation of a gap (13') between the binding element (10') and the envelope surface (3) of the sheet metal roll (1).
    [3] _ A method according to claim 1, wherein the binding element (10) is axially arranged around the sheet metal roll (1) incontact with the envelope surface (3), the inner surface (4)and the gables (5) thereof, characterized in that the locationof one or more axially protruding sheet metal edges (12) atone of the gables (5) of the sheet metal roll (1) and thelocation of the binding element (10) are detected in step A tothereby establish the location of the place where the bindingelement (10) projects over an axially protruding sheet metaledge (12) at this gable (5) of the sheet metal roll under theformation of a gap (13) between the binding element and this gable of the sheet metal roll (1 )_
    [4] _ A method according to any of claims 1-3, characterized in that a detection device (21) comprising one or more ultrasonicsensors is used for detecting the location of said sheet metaledge or edges (8; 12) and the location of the binding element(10; 10')_
    [5] _ A method according to any of claims 1-3, characterized in that a detection device (21) comprising a vision system isused for detecting the location of said sheet metal edge or edges (8; 12) and the location of the binding element (10; 10')_ 12
    [6] 6. A method according to any of claims 1-3, characterized in that a detection device (21) comprising one or more contactsensors is used for detecting the location of the sheet metaledge or edges (8; 12) and the location of the binding element(10; 10').
    [7] _ An apparatus for releasing an elongated binding element (10; 10') in the form of a metallic strap from a roll (1) formed ofwound sheet metal (2), the sheet metal roll (1) having anessentially cylindrical envelope surface (3), an essentiallycylindrical inner surface (4) and two opposite annular gables(5), wherein an axial sheet metal edge (8) at an end of thewound sheet metal (2) extends axially across the envelopesurface (3) of the sheet metal roll (1), and wherein the bindingelement (10; 10') is secured to the sheet metal roll (1) withpre-tension, characterized in that the apparatus comprises: - a detection device (21) for detecting the location of said axialsheet metal edge (8) or one or more axially protruding sheetmetal edges (12) at one of the gables (5) of the sheet metalroll (1) and the location of the binding element (10; 10'),wherein the detection device (21), based on the detectedlocation of said sheet metal edge or edges (8; 12) and thedetected location of the binding element (10; 10') is configuredto establish the location of a place where the binding element(10; 10') projects over a sheet metal edge (8; 12) under theformation of a gap (13; 13') between the binding element andthe sheet metal roll (1); - a laser unit (22) for emitting a laser beam (23); and - an electronic control unit (24) connected to the detection device (21) and configured to control the laser beam (23) of 13 the laser unit (22) to be focused onto a part (15; 15') of thebinding element (10; 10') located above said gap (13; 13') inorder to locally heat this part (15; 15') of the binding elementand thereby induce breakage of the binding element (10; 10').
    [8] _ An apparatus according to claim 7, characterized in that the detection device (21) comprises one or more ultrasonicsensors for detecting the location of said sheet metal edge or edges (8; 12) and the location of the binding element (10; 10').
    [9] 9. An apparatus according to claim 7, characterized in that the detection device (21) comprises a vision system for detectingthe location of said sheet metal edge or edges (8; 12) and the location of the binding element (10; 10'). An apparatus according to claim 7, characterized in thatthe detection device (21) comprises one or more contactsensors for detecting the location of said sheet metal edge or edges (8; 12) and the location of the binding element (10; 10').
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    同族专利:
    公开号 | 公开日
    WO2018013030A1|2018-01-18|
    SE540083C2|2018-03-20|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    NL9201286A|1992-07-16|1994-02-16|Csw Maschf|Device for unpacking a longitudinal row of disc-like objects which is held in a package|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1651054A|SE540083C2|2016-07-13|2016-07-13|Method and apparatus for releasing a binding element in the form of a metallic strap from a sheet metal roll|SE1651054A| SE540083C2|2016-07-13|2016-07-13|Method and apparatus for releasing a binding element in the form of a metallic strap from a sheet metal roll|
    US16/315,857| US20190300220A1|2016-07-13|2017-06-14|Method and apparatus for releasing a binding element in the form of a metallic strap from a sheet metal roll|
    PCT/SE2017/050631| WO2018013030A1|2016-07-13|2017-06-14|Method and apparatus for releasing a binding element in the form of a metallic strap from a sheet metal roll|
    CN201780043434.1A| CN109476393A|2016-07-13|2017-06-14|The method and apparatus that the bundle part of metal band forms is unlocked from sheet metal coil|
    EP17828054.1A| EP3484777A4|2016-07-13|2017-06-14|Method and apparatus for releasing a binding element in the form of a metallic strap from a sheet metal roll|
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