EP0699258B1 - Sheet metal covering strips - Google Patents
Sheet metal covering strips Download PDFInfo
- Publication number
- EP0699258B1 EP0699258B1 EP94915032A EP94915032A EP0699258B1 EP 0699258 B1 EP0699258 B1 EP 0699258B1 EP 94915032 A EP94915032 A EP 94915032A EP 94915032 A EP94915032 A EP 94915032A EP 0699258 B1 EP0699258 B1 EP 0699258B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet metal
- metal covering
- areas
- covering strips
- narrow
- 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.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 39
- 239000002184 metal Substances 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000011324 bead Substances 0.000 claims description 17
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 abstract description 5
- 229920003023 plastic Polymers 0.000 abstract description 5
- 229910001092 metal group alloy Inorganic materials 0.000 abstract 1
- 239000007769 metal material Substances 0.000 abstract 1
- 238000004049 embossing Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
- E04D13/0404—Drainage on the roof surface
- E04D13/0445—Drainage channels
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
- E04D3/40—Slabs or sheets locally modified for auxiliary purposes, e.g. for resting on walls, for serving as guttering; Elements for particular purposes, e.g. ridge elements, specially designed for use in conjunction with slabs or sheets
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2221/00—Treating localised areas of an article
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
- E04D13/0404—Drainage on the roof surface
- E04D13/0445—Drainage channels
- E04D2013/045—Drainage channels on inclined roofs
- E04D2013/0454—Drainage channels on inclined roofs at the intersection of roof surfaces, e.g. roof valleys
Definitions
- the invention relates to a cover strip, in particular for a building or the like, the cover strip having different material properties in at least one narrow region which preferably runs in the longitudinal direction than in the adjacent regions of the cover strip.
- Cover strips of this type are used, for example, to cover the gutter in the throat between two meeting inclined surfaces of a roof or to cover the edges on a component projecting beyond the roof surface.
- the strip used for covering must be folded according to the on-site conditions. In order to produce a clean bending edge, a folding device is required on the construction site or in the workshop.
- a cover strip is known from DE-A-38 28 297, in which at least one narrow region, preferably running in the longitudinal direction, has a lower hardness and greater flexibility than the regions of the cover strip adjoining it.
- the cover strip consists of an essentially stiff, extruded, profiled plastic sheet which has areas of different hardness and flexibility which are produced over the cross-sectional width by means of coextrusion of molding compounds which harden differently.
- the invention has for its object to provide a cover strip made of sheet metal, which is easy to manufacture, which is easily bent in one or more predetermined, essentially linear narrow areas without tools and is otherwise stiff.
- the cover strip is designed as a band made of a uniform metallic raw material, preferably of aluminum, wherein the narrow area has a structure with lower strength and higher elongation at break than the adjacent areas.
- the cover strip according to the invention is particularly well suited for covering a gutter if at least three narrow areas running in the longitudinal direction are provided with a material with lower strength and higher elongation at break than in the other areas, one in the longitudinal center and one adjacent to the respective side edge . If a further bevel is required in the edge area, additional narrow areas running in the longitudinal direction can be provided with a structure with lower strength and higher elongation at break than in the other areas.
- a particularly simple production is possible if areas with different structures, in which the sheet metal can be bent differently, are present in a strip made of uniform metallic raw material by cold forming or soft annealing, the narrow areas being a structure with lower strength and higher elongation at break than have the adjacent areas.
- the metal of the cover strip is given a structure with high strength by cold working, except in one or more narrow areas.
- the narrow areas represent predetermined bending lines.
- the cover strip can be supplied in a flat form, so that little space is required for storage and transport.
- a bend of the cover strip according to the invention can be carried out very easily and without a folding tool on the construction site by placing the cover strip along the predetermined bending line on the edge of a table or board and bending the protruding stiffened area by hand.
- Any metal is suitable as a uniform raw material for the production of the cover strip according to the invention, in which cold deformation increases the yield strength to at least about twice the value and the elongation at break can be reduced to about half or less.
- Aluminum is particularly suitable as a metal, the structure of which can be easily changed by cold working.
- Tensile strength [kp / mm 2 ] 11 ... 14 13 ... 18 4 ... 7 7 ... 9 Yield strength [kp / mm 2 ] 10 ... 13 10 ... 15 1.5..4 2 ... 4 Brinell hardness [kp / mm 2 ] 25 ... 30 33 ... 40 15 ... 19 18 ... 23 Elongation at break [%] 5 ... 4 8 ... 4 55 ... 30 35 ... 30
- annealed aluminum has less than half tensile strength, less than one third yield strength, about half a Brinell hardness, and seven times elongation at break compared to cold worked aluminum.
- a corrosion-protective layer is provided at least on the upper side of the cover strip.
- the layer can consist of paint or plastic, blackening is also possible. If the cover strip is made of aluminum, the surface can be anodized.
- a coated cover strip can be used universally in the roof area if the top and bottom are coated in different colors, so that on the construction site the bend can be made so that the colored side of the roof covering comes to rest on top.
- cold-formed metal sheet can be used on the one hand as the raw material, which has one or more narrow areas with a structure produced by targeted heating with lower strength and higher elongation at break.
- a change in structure due to heating can occur 300 ° C to 460 ° C can be reached.
- the area containing a structure with reduced strength must be as narrow as possible. This can be achieved, for example, by heating by flame, radiation, electrical resistance heating, inductive heating or plasma. Heating by radiation can take place, for example, with laser beams or electron beams.
- the raw material of the cover strip can also be soft metal sheet which, in broad areas adjacent to one or more narrow areas, has a structure with increased strength produced by cold working.
- the cold forming does not take place over the entire width of the raw material strip, but only partially.
- the cold-formed surface is usually also enlarged, albeit only slightly. This results in tensions in relation to the untreated narrow areas, which lead to an uneven, dented surface.
- the increase in the area can be compensated for by appropriate profiling of the surface if the cover strip has beads which run essentially in the transverse direction and is essentially flat in the narrow area or areas. This can be achieved in that beads are embossed only in the areas of the originally flat cover strip to be stiffened with embossing dies or with profile rollers.
- Soft aluminum is particularly suitable as the raw material for the cover strip, in particular with a thickness of less than 1 mm. When embossing the beads, soft aluminum is hardened as a result of structural changes, so that the stiffening is achieved both by this and also by the shape.
- the beads can have a sawtooth-shaped profile in longitudinal section.
- the short sections of the profile are arranged so that they slope down towards the eaves, so that the surface forms a kind of staircase on which rainwater can drain off easily.
- the rigidity can be increased if the beads have a trapezoidal profile in longitudinal section.
- the beads can be embossed alternately to the top and bottom, so that there is an approximately wavy profile in longitudinal section.
- a particularly high rigidity is achieved if the beads are arranged adjacent to one another and the trapezoidal angle is less than 45 °, the depth of the profile is less than 5 mm, preferably about 3 mm, and the bead spacing is less than 50 mm, preferably about 16 mm.
- a section of a cover strip 10 according to the invention for covering a gutter is shown in plan view.
- the cover strip 10 consists of cold-rolled aluminum with a purity of 99.5%.
- the cover strip 10 is 2000 mm long, 500 mm wide and 0.7 mm thick.
- the cover strip 10 has a narrow region 12 which extends over the entire length and whose material contains a structure with reduced strength.
- each have two structures that also run in the longitudinal direction with a reduced structure Narrow lateral areas 14 and 16 and 18 and 20 containing strength are arranged at a distance of 27 mm and 17.5 mm from the longitudinal edges 22 and 24 in order to enable easy folding during assembly.
- the narrow areas 12, 14, 16, 18 and 20 containing a structure with reduced strength are approximately 5 mm wide.
- the material has a structure with the original structure produced by cold rolling with high strength.
- FIG. 2 shows a cover strip 110 corresponding to the cover strip 10 from FIG. 1, which is coated on its upper side with a plastic layer 111.
- the cover strip 110 In its longitudinal center, the cover strip 110 is bent upward in a narrow region 112 containing a structure with reduced strength at an angle corresponding to a gutter of a roof.
- the cover strip 110 is bent at a distance of 27 mm parallel to its longitudinal edges 122 and 124, a structure with reduced strength containing narrow regions 114 and 116 approximately perpendicular to the top and at a distance of 17.5 mm parallel to its longitudinal edges 122 and 124 extending narrow regions 118 and 120, which contain a structure with reduced strength, are bent approximately at right angles to the outside.
- the edge areas 134, 136 are placed on slats 138, 140 mounted parallel to the throat, fastened with adhesive clips according to the technical rules and covered by roof covering plates 142, 144.
- FIG. 3 shows a cover strip 210 corresponding to the cover strip 10 from FIG. 1, which is coated on its upper side with a plastic layer 211.
- the cover strip 210 is bent upward in a narrow region 212 containing a structure with reduced strength at an angle corresponding to a gutter of a roof.
- the cover strip 210 is parallel at a distance of 27 mm to its longitudinal edges 222 and 224, a narrow narrow structure 214 and 216 containing a structure with reduced strength folded over 180 ° parallel to the top and at a distance of 17.5 mm parallel to its longitudinal edges 222 and 224, a structure with reduced strength containing narrow regions 218 and 220 near the edge, bent upward by approximately 45 °.
- the folded areas 230, 232 are fastened to the throat-forming planks 238, 240 using adhesive clips and covered by roof covering plates 242, 244.
- cover strip 310 shows a detail of a cover strip 310 according to the invention in a profiled design for covering a gutter in plan view.
- the cover strip 310 consists of originally soft aluminum sheet 0.7 mm thick with a purity of 99.5%.
- the cover strip 310 is 2000 mm long and 500 mm wide.
- cover strip 310 has a central, flat, narrow region 312 of 5 mm in width, which extends over the entire length.
- a flat lateral narrow region 314 and 316 which also runs in the longitudinal direction, is arranged at a distance of 27 mm from the adjacent longitudinal edge 318 and 320, respectively, in order to enable easy folding during assembly.
- the lateral narrow areas 314 and 316 are approximately 12 mm wide.
- Trapezoidal profiled areas 326, 328, 330 and 332 are arranged between the narrow areas 312, 314 and 316 and towards the longitudinal edges 318, 320, the material of which, compared to the narrow areas 312, 314 and 316, has a structure with a higher profile which is produced by cold forming during profiling Has strength.
- the cover strip 310 has a profile with a trapezoidal angle of 45 °, a depth of the profile of 3 mm and a bead spacing of 16 mm.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Sustainable Development (AREA)
- Laminated Bodies (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
- Wrappers (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Building Environments (AREA)
Abstract
Description
Die Erfindung betrifft einen Abdeckstreifen, insbesondere für ein Bauwerk oder dergleichen, wobei der Abdeckstreifen in zumindest einem vorzugsweise in Längsrichtung verlaufenden schmalen Bereich andere Materialeigenschaften als in den angrenzenden Bereichen des Abdeckstreifens aufweist.The invention relates to a cover strip, in particular for a building or the like, the cover strip having different material properties in at least one narrow region which preferably runs in the longitudinal direction than in the adjacent regions of the cover strip.
Derartige Abdeckstreifen werden beispielsweise zur Abdeckung der Kehlrinne in der Kehle zwischen zwei zusammentreffenden geneigten Flächen eines Daches oder zur Abdeckung der Kanten an einem über die Dachfläche herausragenden Bauteil verwendet. Der zur Abdeckung verwendete Streifen muß den bauseitigen Gegebenheiten entsprechend abgekantet werden. Um eine saubere Biegekante herzustellen ist auf der Baustelle oder in der Werkstatt eine Abkantvorrichtung erforderlich.Cover strips of this type are used, for example, to cover the gutter in the throat between two meeting inclined surfaces of a roof or to cover the edges on a component projecting beyond the roof surface. The strip used for covering must be folded according to the on-site conditions. In order to produce a clean bending edge, a folding device is required on the construction site or in the workshop.
Aus DE-A-38 28 297 ist ein Abdeckstreifen bekannt, bei dem zumindest ein vorzugsweise in Längsrichtung verlaufender schmaler Bereich eine geringere Härte und eine höhere Biegbarkeit aufweist als die daran angrenzenden Bereiche des Abdeckstreifens. Der Abdeckstreifen besteht aus einer im wesentlichen steifen, stranggepreßten, profilierten Kunststoffbahn, die über die Querschnittsbreite mittels Koextrusion unterschiedlich härtender Preßmassen erzeugte Bereiche unterschiedlicher Härte und Biegbarkeit aufweist.A cover strip is known from DE-A-38 28 297, in which at least one narrow region, preferably running in the longitudinal direction, has a lower hardness and greater flexibility than the regions of the cover strip adjoining it. The cover strip consists of an essentially stiff, extruded, profiled plastic sheet which has areas of different hardness and flexibility which are produced over the cross-sectional width by means of coextrusion of molding compounds which harden differently.
Der Erfindung liegt die Aufgabe zugrunde, einen Abdeckstreifen aus Blech zu schaffen, der einfach herstellbar ist, der in einem oder mehreren vorgegebenen im wesentlichen linienförmigen schmalen Bereichen ohne Werkzeug leicht abkantbar und im übrigen steif ist.The invention has for its object to provide a cover strip made of sheet metal, which is easy to manufacture, which is easily bent in one or more predetermined, essentially linear narrow areas without tools and is otherwise stiff.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß der Abdeckstreifen als Band aus einheitlichem metallischem Rohmaterial, vorzugsweise aus Aluminium, ausgebildet ist, wobei der schmale Bereich ein Gefüge mit geringerer Festigkeit und höherer Bruchdehnung als die angrenzenden Bereiche aufweist.According to the invention, this object is achieved in that the cover strip is designed as a band made of a uniform metallic raw material, preferably of aluminum, wherein the narrow area has a structure with lower strength and higher elongation at break than the adjacent areas.
Der erfindungsgemäße Abdeckstreifen ist besonders gut zur Abdeckung einer Kehlrinne geeignet, wenn zumindest drei in Längsrichtung verlaufende schmale Bereiche mit einem Material mit geringerer Festigkeit und höherer Bruchdehnung als in den übrigen Bereichen vorgesehen sind, und zwar einer in der Längsmitte und je einer benachbart zum jeweiligen Seitenrand. Sofern im Randbereich eine weitere Abkantung erforderlich ist, können zusätzlich weitere in Längsrichtung verlaufende schmale Bereiche mit einem Gefüge mit geringerer Festigkeit und höherer Bruchdehnung als in den übrigen Bereichen vorgesehen sein.The cover strip according to the invention is particularly well suited for covering a gutter if at least three narrow areas running in the longitudinal direction are provided with a material with lower strength and higher elongation at break than in the other areas, one in the longitudinal center and one adjacent to the respective side edge . If a further bevel is required in the edge area, additional narrow areas running in the longitudinal direction can be provided with a structure with lower strength and higher elongation at break than in the other areas.
Eine besonders einfache Herstellung ist möglich, wenn in einem Band aus einheitlichem metallischem Rohmaterial durch Kaltverformung bzw. Weichglühen erzeugte Bereiche mit unterschiedlichen Gefügen vorhanden sind, in denen das Blech verschieden leicht abbiegbar ist, wobei die schmalen Bereiche ein Gefüge mit geringerer Festigkeit und höherer Bruchdehnung als die angrenzenden Bereiche aufweisen.A particularly simple production is possible if areas with different structures, in which the sheet metal can be bent differently, are present in a strip made of uniform metallic raw material by cold forming or soft annealing, the narrow areas being a structure with lower strength and higher elongation at break than have the adjacent areas.
Dies kann dadurch erreicht werden, daß das Metall des Abdeckstreifens außer in einem oder mehreren schmalen Bereichen durch Kaltverformung ein Gefüge mit hoher Festigkeit erhält. Die schmalen Bereiche stellen vorgegebene Biegelinien dar. Der Abdeckstreifen kann in ebener Form geliefert werden, sodaß bei der Lagerung und beim Transport wenig Platz benötigt wird. Eine Abkantung des erfindungsgemäßen Abdeckstreifens ist auf der Baustelle sehr einfach und ohne Abkantwerkzeug durchführbar, indem der Abdeckstreifen entlang der vorgegebenen Biegelinie auf den Rand eines Tisches oder Brettes gelegt wird und der überstehende versteifte Bereich mit der Hand abgebogen wird.This can be achieved in that the metal of the cover strip is given a structure with high strength by cold working, except in one or more narrow areas. The narrow areas represent predetermined bending lines. The cover strip can be supplied in a flat form, so that little space is required for storage and transport. A bend of the cover strip according to the invention can be carried out very easily and without a folding tool on the construction site by placing the cover strip along the predetermined bending line on the edge of a table or board and bending the protruding stiffened area by hand.
Als einheitliches Rohmaterial zur Herstellung des erfindungsgemäßen Abdeckstreifens ist jedes Metall geeignet, bei dem durch Kaltverformen die Streckgrenze auf wenigstens etwa den doppelten Wert erhöht und die Bruchdehnung auf etwa die Hälfte oder weniger reduziert werden kann.Any metal is suitable as a uniform raw material for the production of the cover strip according to the invention, in which cold deformation increases the yield strength to at least about twice the value and the elongation at break can be reduced to about half or less.
Als Metall, dessen Gefüge durch Kaltverformung leicht veränderbar ist, eignet sich Aluminium besonders gut. In dem Buch "Werkstoffkunde und Werkstoffprüfung" von Wilhelm Domke, 2.Auflage, Girardet Verlag Essen, sind auf Seite 190 folgende Werte angegeben:
Aus dieser Tabelle ist zu ersehen, daß weichgeglühtes Aluminium gegenüber kaltverformtem Aluminium eine Zugfestigkeit von weniger als der Hälfte, eine Streckgrenze von weniger als einem Drittel, eine Brinellhärte von etwa der Hälfte und eine Bruchdehnung von mehr als dem Siebenfachen aufweist.It can be seen from this table that annealed aluminum has less than half tensile strength, less than one third yield strength, about half a Brinell hardness, and seven times elongation at break compared to cold worked aluminum.
Eine besonders gute Witterungsbeständigkeit wird erreicht, wenn zumindest auf der Oberseite des Abdeckstreifens eine korrosionsschützende Schicht vorgesehen ist. Die Schicht kann aus Farbe oder Kunststoff bestehen, auch Brünieren ist möglich. Wenn der Abdeckstreifen aus Aluminium besteht, kann die Oberfläche eloxiert sein.Particularly good weather resistance is achieved if a corrosion-protective layer is provided at least on the upper side of the cover strip. The layer can consist of paint or plastic, blackening is also possible. If the cover strip is made of aluminum, the surface can be anodized.
Ein beschichteter Abdeckstreifen kann im Dachbereich universell eingesetzt werden, wenn Oberseite und Unterseite verschiedenfarbig beschichtet sind, so daß auf der Baustelle die Abkantung so ausgeführt werden kann, daß die zur Farbe der Dacheindeckung passend gefärbte Seite oben zu liegen kommt.A coated cover strip can be used universally in the roof area if the top and bottom are coated in different colors, so that on the construction site the bend can be made so that the colored side of the roof covering comes to rest on top.
Zur Herstellung des Abdeckstreifens kann einerseits als Rohmaterial kaltverformtes Metallblech eingesetzt werden, welches einen oder mehrere schmale Bereiche mit einem durch gezielte Erwärmung erzeugten Gefüge mit geringerer Festigkeit und höherer Bruchdehnung aufweist. Bei kaltverformtem Aluminium kann eine Gefügeveränderung durch eine Erwärmung auf 300°C bis 460°C erreicht werden. Es versteht sich, daß der ein Gefüge mit verminderter Festigkeit enthaltende Bereich möglichst schmal ausgebildet sein muß. Dies ist beispielsweise dadurch erreichbar, daß die Erwärmung durch eine Flamme, durch Strahlung, durch elektrische Widerstandsheizung, induktive Heizung oder durch Plasma erfolgt. Die Erwärmung durch Strahlung kann beispielsweise mit Laserstrahlen oder Elektronenstrahlen erfolgen.To produce the cover strip, cold-formed metal sheet can be used on the one hand as the raw material, which has one or more narrow areas with a structure produced by targeted heating with lower strength and higher elongation at break. In the case of cold-formed aluminum, a change in structure due to heating can occur 300 ° C to 460 ° C can be reached. It is understood that the area containing a structure with reduced strength must be as narrow as possible. This can be achieved, for example, by heating by flame, radiation, electrical resistance heating, inductive heating or plasma. Heating by radiation can take place, for example, with laser beams or electron beams.
Andererseits kann auch das Rohmaterial des Abdeckstreifens weiches Metallblech sein, das in an einen oder mehrere schmale Bereiche angrenzenden breiten Bereichen ein durch Kaltverformung erzeugtes Gefüge mit erhöhter Festigkeit aufweist. In diesem Fall erfolgt die Kaltverformung nicht über die gesamte Breite des Rohmaterialbandes sondern nur partiell.On the other hand, the raw material of the cover strip can also be soft metal sheet which, in broad areas adjacent to one or more narrow areas, has a structure with increased strength produced by cold working. In this case, the cold forming does not take place over the entire width of the raw material strip, but only partially.
Bei der Kaltverformung, beispielsweise durch Walzen, Pressen oder Prägen, erfolgt meist auch eine wenn auch nur geringe Vergrößerung der kaltverformten Fläche. Dadurch ergeben sich gegenüber den nicht nachbehandelten schmalen Bereichen Spannungen, die zu einer unebenen verbeult erscheinenden Oberfläche führen.In cold forming, for example by rolling, pressing or embossing, the cold-formed surface is usually also enlarged, albeit only slightly. This results in tensions in relation to the untreated narrow areas, which lead to an uneven, dented surface.
Die Vergrößerung der Fläche kann durch entsprechende Profilierung der Oberfläche ausgeglichen werden, wenn der Abdeckstreifen im wesentlichen in Querrichtung verlaufende Sicken aufweist und in dem oder den schmalen Bereichen im wesentlichen flach ausgebildet ist. Dies kann dadurch erreicht werden, daß nur in den zu versteifenden Bereichen des ursprünglich flachen Abdeckstreifens mit Prägestempeln oder mit Profilwalzen Sicken eingeprägt werden. Als Rohmaterial für den Abdeckstreifen eignet sich weiches Aluminium besonders gut, insbesondere mit einer Dicke von weniger als 1 mm. Beim Einprägen der Sicken wird weiches Aluminium infolge von Gefügeveränderung gehärtet, so daß die Versteifung sowohl durch diese als auch zusätzlich noch durch die Formgebung erzielt wird.The increase in the area can be compensated for by appropriate profiling of the surface if the cover strip has beads which run essentially in the transverse direction and is essentially flat in the narrow area or areas. This can be achieved in that beads are embossed only in the areas of the originally flat cover strip to be stiffened with embossing dies or with profile rollers. Soft aluminum is particularly suitable as the raw material for the cover strip, in particular with a thickness of less than 1 mm. When embossing the beads, soft aluminum is hardened as a result of structural changes, so that the stiffening is achieved both by this and also by the shape.
Bei einem für die Abdeckung einer Kehlrinne verwendeten Abdeckstreifen wird Regenwasser besonders gut zur Längsmitte geleitet, wenn die Sicken in der Draufsicht gesehen pfeilförmig zur Längsmitte angeordnet sind. Der Spitzenwinkel der fischgrätenartig angeordneten Sicken sollte etwa 120° bis 140° betragen.In the case of a cover strip used for covering a gutter, rainwater is conducted particularly well to the longitudinal center if the beads are arranged in the shape of an arrow to the longitudinal center when viewed in plan view. The point angle of the beads arranged in a herringbone manner should be approximately 120 ° to 140 °.
Die Sicken können ein im Längsschnitt sägezahnförmiges Profil aufweisen. Bei Verlegung des Abdeckstreifens auf einem Dach werden die kurzen Abschnitte des Profils zur Traufe hin abfallend angeordnet, so daß die Oberfläche eine Art Treppe bildet, auf der Regenwasser gut abfließen kann.The beads can have a sawtooth-shaped profile in longitudinal section. When the cover strip is laid on a roof, the short sections of the profile are arranged so that they slope down towards the eaves, so that the surface forms a kind of staircase on which rainwater can drain off easily.
Die Steifigkeit kann erhöht werden, wenn die Sicken ein im Längsschnitt trapezförmiges Profil aufweisen. Die Sicken können abwechselnd zur Ober- und zur Unterseite geprägt sein, so daß sich ein im Längsschnitt etwa wellenförmiges Profil ergibt.The rigidity can be increased if the beads have a trapezoidal profile in longitudinal section. The beads can be embossed alternately to the top and bottom, so that there is an approximately wavy profile in longitudinal section.
Eine besonders hohe Steifigkeit wird erreicht, wenn die Sicken aneinandergrenzend angeordnet sind und der Trapezwinkel weniger als 45°, die Tiefe des Profils weniger als 5 mm, vorzugsweise etwa 3 mm, und der Sickenabstand weniger als 50 mm, vorzugsweise etwa 16 mm beträgt.A particularly high rigidity is achieved if the beads are arranged adjacent to one another and the trapezoidal angle is less than 45 °, the depth of the profile is less than 5 mm, preferably about 3 mm, and the bead spacing is less than 50 mm, preferably about 16 mm.
Eine beidseitige Anwendung des Abdeckstreifens ist möglich, wenn die schmalen Bereiche in der Höhenlage mittig zur Profilierung angeordnet sind.It is possible to use the cover strip on both sides if the narrow areas are arranged in the middle of the profile in relation to the height.
Wenn zusätzlich zu einem mittleren schmalen Bereich nahe den Seitenrändern ein oder zwei weitere schmale Bereiche mit einem Gefüge mit geringerer Festigkeit und höherer Bruchdehnung als in den übrigen Bereichen des Abdeckstreifens vorgesehen sind, so ist eine gemeinsame Abkantung zweier aufeinander liegender Abdeckstreifen im Bereich der Überlappung besonders leicht möglich, wenn die seitlichen schmalen Bereiche eine Breite von wenigstens 10 mm aufweisen.If, in addition to a middle narrow area near the side edges, one or two further narrow areas with a structure with lower strength and higher elongation at break than in the other areas of the cover strip are provided, then a mutual folding of two is one another lying cover strip in the area of the overlap is particularly easy if the narrow lateral areas have a width of at least 10 mm.
In der Zeichnung sind zwei bevorzugte Ausführungsbeispiele der Erfindung dargestellt, die im folgenden näher erläutert werden.The drawing shows two preferred exemplary embodiments of the invention, which are explained in more detail below.
Es zeigt
- Fig. 1
- einen Ausschnitt eines erfindungsgemäßen Abdeckstreifens zur Abdeckung einer Kehlrinne in der Draufsicht,
- Fig. 2
- einen mit Kunststoff beschichteten Abdeckstreifen entsprechend Fig. 1 in einer Kehlrinne eines Daches in perspektivischer Ansicht in einer ersten Einbausituation,
- Fig. 3
- einen mit Kunststoff beschichteten Abdeckstreifen entsprechend Fig. 1 in einer Kehlrinne eines Daches in perspektivischer Ansicht in einer zweiten Einbausituation und
- Fig. 4
- einen Ausschnitt eines zweiten erfindungsgemäßen Abdeckstreifens in profilierter Ausführung zur Abdeckung einer Kehlrinne in der Draufsicht.
- Fig. 1
- a detail of a cover strip according to the invention for covering a gutter in plan view,
- Fig. 2
- 1 in a valley gutter of a roof in a perspective view in a first installation situation,
- Fig. 3
- a plastic-coated cover strip according to FIG. 1 in a gutter of a roof in a perspective view in a second installation situation and
- Fig. 4
- a section of a second cover strip according to the invention in a profiled design for covering a gutter in plan view.
In Fig. 1 ist ein Ausschnitt eines erfindungsgemäßen Abdeckstreifens 10 zur Abdeckung einer Kehlrinne in der Draufsicht dargestellt. Der Abdeckstreifen 10 besteht aus kaltgewalztem Aluminium mit einer Reinheit von 99,5%. Der Abdeckstreifen 10 ist 2000 mm lang, 500 mm breit und 0,7 mm dick. In seiner Längsmitte weist der Abdeckstreifen 10 einen sich über die gesamte Länge erstreckenden schmalen Bereich 12 auf, dessen Material ein Gefüge mit verminderter Festigkeit enthält. Außerdem sind je zwei ebenfalls in Längsrichtung verlaufende ein Gefüge mit verminderter Festigkeit enthaltende schmale seitliche Bereiche 14 und 16 sowie 18 und 20 im Abstand von 27 mm bzw. von 17,5 mm von den Längsrändern 22 und 24 angeordnet, um ein leichtes Abkanten bei der Montage zu ermöglichen. Die ein Gefüge mit verminderter Festigkeit enthaltenden schmalen Bereiche 12, 14, 16, 18 und 20 sind etwa 5 mm breit. In den übrigen den größten Teil der Fläche einnehmenden breiten Bereichen 26, 28, 30, 32, 34 und 36 besitzt das Material ein Gefüge mit dem ursprünglichen durch Kaltwalzen erzeugten Gefüge mit hoher Festigkeit.In Fig. 1 a section of a
In Fig. 2 ist ein dem Abdeckstreifen 10 aus Fig. 1 entsprechender Abdeckstreifen 110 dargestellt, der auf seiner Oberseite mit einer Kunststoffschicht 111 beschichtet ist. In seiner Längsmitte ist der Abdeckstreifen 110 in einem ein Gefüge mit verminderter Festigkeit enthaltenden schmalen Bereich 112 in einem einer Kehlrinne eines Daches entsprechenden Winkel nach oben abgekantet. Der Abdeckstreifen 110 ist an im Abstand von 27 mm parallel zu seinen Längsrändern 122 bzw. 124 verlaufenden ein Gefüge mit verminderter Festigkeit enthaltenden seitlichen schmalen Bereichen 114 und 116 etwa rechtwinklig nach oben hin abgekantet und an im Abstand von 17,5 mm parallel zu seinen Längsrändern 122 bzw. 124 verlaufenden ein Gefüge mit verminderter Festigkeit enthaltenden randnahen schmalen Bereichen 118 und 120 etwa rechtwinklig nach außen hin abgekantet. Die Randbereiche 134, 136 sind auf parallel zur Kehle montierten Latten 138, 140 aufgelegt, gemäß den Fachregeln mit Haftklammern befestigt und von Dacheindeckungsplatten 142, 144 überdeckt.FIG. 2 shows a
In Fig. 3 ist ein dem Abdeckstreifen 10 aus Fig. 1 entsprechender Abdeckstreifen 210 dargestellt, der auf seiner Oberseite mit einer Kunststoffschicht 211 beschichtet ist. In seiner Längsmitte ist der Abdeckstreifen 210 in einem ein Gefüge mit verminderter Festigkeit enthaltenden schmalen Bereich 212 in einem einer Kehlrinne eines Daches entsprechenden Winkel nach oben abgekantet. Der Abdeckstreifen 210 ist an im Abstand von 27 mm parallel zu seinen Längsrändern 222 bzw. 224 verlaufenden ein Gefüge mit verminderter Festigkeit enthaltenden seitlichen schmalen Bereichen 214 und 216 um 180° parallel zur Oberseite umgekantet und an im Abstand von 17,5 mm parallel zu seinen Längsrändern 222 bzw. 224 verlaufenden ein Gefüge mit verminderter Festigkeit enthaltenden randnahen schmalen Bereichen 218 und 220 um etwa 45° nach oben hin abgekantet. Die umgekanteten Bereiche 230, 232 sind gemäß den Fachregeln mit Haftklammern auf die Kehle bildenden Bohlen 238, 240 befestigt und von Dacheindeckungsplatten 242, 244 überdeckt.FIG. 3 shows a
In Fig. 4 ist ein Ausschnitt eines erfindungsgemäßen Abdeckstreifens 310 in profilierter Ausführung zur Abdeckung einer Kehlrinne in der Draufsicht dargestellt. Der Abdeckstreifen 310 besteht aus ursprünglich weichem Aluminiumblech von 0,7 mm Dicke mit einer Reinheit von 99,5%. Der Abdeckstreifen 310 ist 2000 mm lang und 500 mm breit. In seiner Längsmitte weist der Abdeckstreifen 310 einen mittleren flachen schmalen Bereich 312 von 5 mm Breite auf, der sich über die gesamte Länge erstreckt. Außerdem ist je ein ebenfalls in Längsrichtung verlaufender flacher seitlicher schmaler Bereich 314 und 316 im Abstand von 27 mm vom benachbarten Längsrand 318 bzw. 320 angeordnet, um ein leichtes Abkanten bei der Montage zu ermöglichen. Die seitlichen schmalen Bereiche 314 und 316 sind etwa 12 mm breit. Zwischen den schmalen Bereichen 312, 314 und 316 sowie zu den Längsrändern 318, 320 hin sind trapezförmig profilierte Bereiche 326, 328, 330 und 332 angeordnet, deren Material gegenüber den schmalen Bereichen 312, 314 und 316 ein durch Kaltverformen beim Profilieren erzeugtes Gefüge mit höherer Festigkeit aufweist. In diesen profilierten Bereichen 326, 328, 330 und 332 besitzt der Abdeckstreifen 310 ein Profil mit einem Trapezwinkel von 45°, einer Tiefe des Profils von 3 mm und einem Sickenabstand von 16 mm.4 shows a detail of a
Claims (12)
- Sheet metal covering strips (10; 110; 210; 310) especially for a construction or the like, the sheet metal covering strips showing (10; 110; 210; 310) in at least one narrow area, extending preferably in the longitudinal direction, other material qualities than in the areas (26, 28; 126, 128; 226, 228; 326, 328) adjacent to the sheet metal covering strips (10; 110; 210; 310),
characterized in that the sheet metal covering strips (10; 110; 210; 310) have the shape of a ribbon of homogeneous metallic raw material, preferably of aluminum, the narrow areas (12, 14, 16; 112, 114, 116; 212, 214, 216; 312, 314, 316) showing a structure with less resistance and higher breaking elongation than the adjacent areas (26, 28; 126, 128; 226, 228; 326, 328). - Sheet metal covering strips according to claim 1,
characterized in that
at least three narrow areas extending in the longitudinal direction (12, 14, 16; 112, 114, 116; 212, 214, 216; 312, 314, 316) are provided for with a material of less resistance and higher breaking elongation. - Sheet metal covering strips according to claim 1 or 2,
characterized in that
at least on the upper side of the sheet metal covering strips (110, 210) an anticorrosive coat (111 resp. 211) is provided for. - Sheet metal covering strips according to one of claims 1 to 3,
characterized in that
the upper side and the lower side of the sheet metal covering strips (10; 110, 210; 310) are coated in different colours. - Sheet metal covering strips according to one of claims 1 to 4,
characterized in that
the raw material of the sheet metal covering strips (10; 110; 210) is a cold formed sheet metal which shows one or several narrow areas (12, 14, 16; 112, 114, 116; 212, 214, 216; 312, 314, 316) with a structure produced by well-aimed heating with less resistance and higher breaking elongation. - Sheet metal covering strips according to one of claims 1 to 4,
characterized in that
the raw material of the sheet metal covering strips (310) is of soft sheet metal and shows a structure with higher resistance, produced by cold forming, in wider areas (326, 328, 330, 332) adjacent to one or several narrow areas (312, 314, 316). - Sheet metal covering strips according to one of claims 1 to 6,
characterized in that
the sheet metal covering strip (310) shows beads extending essentially in the transverse direction in the wide areas (326, 328, 330, 332) and in that it is essentially flatshaped in the narrow area(s) (312, 314, 316). - Sheet metal covering strips according to claim 7,
characterized in that
seen from the top, the beads are arranged arrow-shaped towards the longitudinal center. - Sheet metal covering strips according to claim 7 or 8,
characterized in that
the beads show a serrated profile in the longitudinal section. - Sheet metal covering strips according to claim 7 or 8,
characterized in that
the beads show a trapezoidal profile in the longitudinal section. - Sheet metal covering strips according to claim 10,
characterized in that
the beads are arranged adjacent to each other and that the trapezoidal angle amounts to less than 45°, that the depth of the profile amounts to less than 5 mm, preferably to 3 mm, and that the beads interval amounts to less than 50 mm, preferably to about 16 mm. - Sheet metal covering strips according to one of claims 7 to 11,
characterized in that
in the height, the narrow areas (312, 314, 316) are centered with respect to the profile.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4316437 | 1993-05-17 | ||
| DE4316437A DE4316437A1 (en) | 1992-11-14 | 1993-05-17 | Sheet-metal cover strip - incorporating narrow longitudinal regions with lower strength and higher breaking strain than the rest of the strip |
| PCT/DE1994/000559 WO1994026997A1 (en) | 1993-05-17 | 1994-05-10 | Sheet metal covering strips |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0699258A1 EP0699258A1 (en) | 1996-03-06 |
| EP0699258B1 true EP0699258B1 (en) | 1997-09-03 |
Family
ID=6488271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94915032A Expired - Lifetime EP0699258B1 (en) | 1993-05-17 | 1994-05-10 | Sheet metal covering strips |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0699258B1 (en) |
| AT (1) | ATE157730T1 (en) |
| CZ (1) | CZ286871B6 (en) |
| DK (1) | DK0699258T3 (en) |
| ES (1) | ES2106532T3 (en) |
| FI (1) | FI955540A (en) |
| HU (1) | HU214372B (en) |
| NO (1) | NO305611B1 (en) |
| PL (1) | PL184916B1 (en) |
| WO (1) | WO1994026997A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19912134A1 (en) * | 1999-03-18 | 2000-09-21 | Kurt Schade Gmbh & Co Ing | Covering for groove channel between two abutting inclined surfaces of roof which in area of groove has sub-structure comprising roof rafter in which is groove |
| DE10002428A1 (en) | 2000-01-20 | 2001-07-26 | Kloeber Gmbh & Co Kg | Strip for bending into roof valley strip comprises thin bitumen underbody layer which in overlapping joining area of two strips can be melted onto metal strip |
| FR2956678B1 (en) * | 2010-02-24 | 2012-05-18 | Daniel Cauquil | ROOFING NU |
| US10024060B2 (en) | 2016-06-28 | 2018-07-17 | Dryflekt, Inc. | Valley flashing |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1251269A (en) * | 1969-05-23 | 1971-10-27 | ||
| US4449333A (en) * | 1982-06-18 | 1984-05-22 | Stratton David G | Valley strip for roof structure |
| DE3511089A1 (en) * | 1984-10-24 | 1986-04-24 | Oskar 4354 Datteln Fleck | CLADDING ELEMENT FOR A ROOFTOP |
| DE3828297C2 (en) * | 1988-06-14 | 1994-01-20 | Alfons Knoche | Cover element for gutters |
| US5115603A (en) * | 1990-09-20 | 1992-05-26 | Roof-Flex | Roof valley flashing including expansion joint |
-
1994
- 1994-05-10 CZ CZ19953002A patent/CZ286871B6/en not_active IP Right Cessation
- 1994-05-10 EP EP94915032A patent/EP0699258B1/en not_active Expired - Lifetime
- 1994-05-10 AT AT94915032T patent/ATE157730T1/en active
- 1994-05-10 HU HU9503262A patent/HU214372B/en not_active IP Right Cessation
- 1994-05-10 DK DK94915032.0T patent/DK0699258T3/en active
- 1994-05-10 ES ES94915032T patent/ES2106532T3/en not_active Expired - Lifetime
- 1994-05-10 WO PCT/DE1994/000559 patent/WO1994026997A1/en active IP Right Grant
- 1994-05-10 PL PL94311693A patent/PL184916B1/en not_active IP Right Cessation
-
1995
- 1995-11-16 FI FI955540A patent/FI955540A/en unknown
- 1995-11-16 NO NO954625A patent/NO305611B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CZ286871B6 (en) | 2000-07-12 |
| DK0699258T3 (en) | 1998-04-14 |
| CZ300295A3 (en) | 1996-05-15 |
| ATE157730T1 (en) | 1997-09-15 |
| EP0699258A1 (en) | 1996-03-06 |
| NO305611B1 (en) | 1999-06-28 |
| NO954625L (en) | 1996-01-12 |
| PL184916B1 (en) | 2003-01-31 |
| WO1994026997A1 (en) | 1994-11-24 |
| FI955540A0 (en) | 1995-11-16 |
| HU214372B (en) | 1998-03-30 |
| PL311693A1 (en) | 1996-03-04 |
| ES2106532T3 (en) | 1997-11-01 |
| FI955540A (en) | 1995-11-16 |
| NO954625D0 (en) | 1995-11-16 |
| HUT72961A (en) | 1996-06-28 |
| HU9503262D0 (en) | 1996-01-29 |
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