WO2018216105A1 - 金属屋根材及びそれを用いた屋根葺き方法 - Google Patents
金属屋根材及びそれを用いた屋根葺き方法 Download PDFInfo
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- WO2018216105A1 WO2018216105A1 PCT/JP2017/019200 JP2017019200W WO2018216105A1 WO 2018216105 A1 WO2018216105 A1 WO 2018216105A1 JP 2017019200 W JP2017019200 W JP 2017019200W WO 2018216105 A1 WO2018216105 A1 WO 2018216105A1
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- roofing material
- main body
- metal roofing
- metal
- opening
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- 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
- E04D3/24—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like
- E04D3/30—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
- E04D1/24—Roofing elements with cavities, e.g. hollow tiles
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
- E04D1/12—Roofing elements shaped as plain tiles or shingles, i.e. with flat outer surface
- E04D1/18—Roofing elements shaped as plain tiles or shingles, i.e. with flat outer surface of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
- E04D1/28—Roofing elements comprising two or more layers, e.g. for insulation
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
- E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
-
- 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
- E04D3/35—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation
-
- 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
- E04D3/35—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation
- E04D3/351—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation at least one of the layers being composed of insulating material, e.g. fibre or foam material
- E04D3/352—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation at least one of the layers being composed of insulating material, e.g. fibre or foam material at least one insulating layer being located between non-insulating layers, e.g. double skin slabs or sheets
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- 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
- E04D3/36—Connecting; Fastening
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- 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
- E04D3/36—Connecting; Fastening
- E04D3/3601—Connecting; Fastening of roof covering supported by the roof structure with interposition of a insulating layer
- E04D3/3603—Connecting; Fastening of roof covering supported by the roof structure with interposition of a insulating layer the fastening means being screws or nails
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
- E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
- E04D2001/3408—Fastenings for attaching roof-covering elements to the supporting elements characterised by the fastener type or material
- E04D2001/3423—Nails, rivets, staples or straps piercing or perforating the roof covering material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
- E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
- E04D2001/3408—Fastenings for attaching roof-covering elements to the supporting elements characterised by the fastener type or material
- E04D2001/3426—Threaded elements, e.g. screws or bolts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
- E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
- E04D2001/3408—Fastenings for attaching roof-covering elements to the supporting elements characterised by the fastener type or material
- E04D2001/3438—Fasteners comprising several coacting elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
- E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
- E04D2001/3444—Fastenings for attaching roof-covering elements to the supporting elements characterised by the roof covering or structure with integral or premounted fastening means
- E04D2001/3447—Fastenings for attaching roof-covering elements to the supporting elements characterised by the roof covering or structure with integral or premounted fastening means the fastening means being integral or premounted to the roof covering
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
- E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
- E04D2001/3452—Fastenings for attaching roof-covering elements to the supporting elements characterised by the location of the fastening means
- E04D2001/3455—Fastenings for attaching roof-covering elements to the supporting elements characterised by the location of the fastening means on the internal surface of the roof covering elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
- E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
- E04D2001/3488—Fastenings for attaching roof-covering elements to the supporting elements characterised by the type of roof covering elements being fastened
- E04D2001/3494—Fastenings for attaching roof-covering elements to the supporting elements characterised by the type of roof covering elements being fastened made of rigid material having a flat external surface
Definitions
- the present invention relates to a metal roofing material that is tightly bound to a roof base by driving a fastening member and a roofing method using the same.
- the inventors of the present invention have a metal roofing material as shown in Patent Document 1 below, that is, a metal front base material, a back base material disposed on the back side of the front base material, a front base material and a back surface.
- a metal roofing material provided with a core material made of foamed resin filled between the base material. After such a metal roofing material is disposed on the roof base, the metal roofing material is fastened to the roof base by driving a fastening member such as a nail or a screw.
- a dent or buckling may occur around the driving position of the binding member due to the pressure caused by the driving of the binding member.
- a dent or buckling causes retention of moisture such as rain water which causes corrosion of the metal roof material and deterioration of the design of the metal roof material.
- a method for preventing dents or buckling a method of increasing the plate thickness of the front base material can be considered, but when such a method is adopted, an increase in the roof weight is caused.
- the present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a metal roofing material capable of reducing the dent or buckling of the front base material due to the driving of the binding member and the use thereof. Is to provide a roofing method.
- the metal roofing material according to the present invention includes a front base material having a main body formed in a box shape using a metal plate as a raw material, and a back base disposed on the back side of the front base so as to close the opening of the main body.
- a metal roofing material provided with a core material filled between the main body part and the back substrate, and fastened to the roof base by driving the fastening member into the main body part, and is arranged along the polygonal sides.
- a projecting rib composed of at least one projecting portion provided along the circle is provided on the top plate portion of the main body, and the fastening member is driven into the inner region of the projecting rib. It is configured.
- the roofing method according to the present invention includes a front base material having a main body formed in a box shape using a metal plate as a raw material, and a back base disposed on the back side of the front base so as to close the opening of the main body. And a core material filled between the main body portion and the back substrate, and is arranged along a polygonal side or at least one protrusion arranged along a circle.
- the projecting rib comprising at least one projecting portion disposed along a polygonal side or disposed along a circle is provided. Since it is provided in the top plate part of the main body part and the binding member is driven into the inner region of the projecting rib, the dent or buckling of the front base material due to the driving of the binding member can be reduced.
- FIG. 3 is a cross-sectional view of a metal roof material taken along line III-III in FIG.
- FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6.
- FIG. 6 shows the circle
- Embodiment. 1 is a front view showing a metal roofing material 1 according to an embodiment of the present invention
- FIG. 2 is a rear view showing the metal roofing material 1 of FIG. 1
- FIG. 3 is taken along line III-III of FIG. 4 is a cross-sectional view of the metal roofing material 1
- FIG. 4 is an explanatory view showing another embodiment of the main body 100 of FIG. 1
- FIG. 5 shows a roofing structure and a roofing method using the metal roofing material 1 of FIG. It is explanatory drawing shown.
- the metal roofing material 1 shown in FIGS. 1 to 3 is arranged together with other metal roofing materials on the roof foundation of a building such as a house, as shown in FIG. As particularly shown in FIG. 3, the metal roofing material 1 has a front base material 10, a back base material 11, and a core material 12.
- the front substrate 10 is made of a metal plate, and is a member that appears on the outer surface of the roof when the metal roofing material 1 is placed on the roof base.
- the metal plate that is the material of the front substrate 10 is a hot-dip Zn-plated steel plate, hot-dip Al-plated steel plate, hot-dip Zn-plated stainless steel plate, hot-dip Al-plated stainless steel plate, stainless steel plate, Al plate, Ti plate, and paint-melted Zn-base.
- a plated steel plate, a coated hot-dip Al-plated steel plate, a coated hot-dip Zn-based plated stainless steel plate, a painted hot-Al plated stainless steel plate, a painted stainless steel plate, a painted Al plate, or a coated Ti plate can be used.
- the thickness of the metal plate is preferably 0.5 mm or less. As the thickness of the metal plate increases, the strength of the roofing material increases while the weight increases. By setting the thickness of the metal plate to 0.5 mm or less, it is possible to avoid the weight of the metal roofing material 1 from becoming too large, and to cover equipment such as solar cell modules, solar water heaters, air conditioner outdoor units, snow melting related equipment, etc. The total weight of the roof when placed on top can be reduced. In addition, it is preferable that the thickness of a metal plate is 0.27 mm or more. By setting the thickness of the metal plate to 0.27 mm or more, the strength required as a roofing material can be secured, and the wind pressure resistance performance and the crushing performance can be sufficiently obtained. The wind pressure resistance is the performance that the metal roofing material 1 can withstand without buckling against strong wind.
- the front substrate 10 has a box-shaped main body portion 100 having a top plate portion 101 and a peripheral wall portion 102.
- the main body 100 is preferably formed by drawing or overhanging a metal plate.
- the peripheral wall portion 102 can be a wall surface continuous in the circumferential direction of the front substrate 10, and moisture can enter the inside of the main body portion 100. Can be lowered.
- the box-shaped main body 100 can be formed by bending a metal plate having a shape as shown in FIG.
- the peripheral wall 102 is formed by work hardening. Hardness can be increased. Specifically, the Vickers hardness of the peripheral wall portion 102 can be increased by about 1.4 to 1.6 times compared to before processing. As described above, the peripheral wall portion 102 is a wall surface continuous in the circumferential direction of the front substrate 10 and the hardness of the peripheral wall portion 102 is increased by work hardening, so that the wind pressure resistance performance of the metal roofing material 1 is remarkably improved. .
- the back substrate 11 is a member arranged on the back side of the front substrate 10 so as to close the opening of the main body 100.
- a lightweight material such as aluminum foil, aluminum vapor-deposited paper, aluminum hydroxide paper, calcium carbonate paper, resin film or glass fiber paper can be used. By using these lightweight materials for the back substrate 11, it is possible to avoid an increase in the weight of the metal roofing material 1.
- the core material 12 is made of, for example, a foamed resin or the like, and is filled between the main body portion 100 of the front base material 10 and the back base material 11.
- the core material 12 is filled between the main body portion 100 and the back base material 11, so that the core material is placed inside the main body portion 100 rather than an aspect in which a backing material such as a resin sheet is attached to the back side of the front base material 10. 12 can be firmly adhered to each other, and the performance required for the roofing material such as rain sound property, heat insulation property and tread resistance can be improved.
- the height h of the main body 100 filled with the core material 12 is preferably 4 mm or more and 8 mm or less.
- the strength of the main body 100 can be sufficiently increased, and wind resistance can be improved.
- the heat insulation is also good at 4 mm or more.
- the height h of the main body 100 to 8 mm or less, it is possible to avoid the increase in the organic mass of the core material 12 and to obtain the incombustible material certification more reliably.
- the metal roofing material 1 has a width direction 100 a (longitudinal direction) of the main body 100 extending along a direction 4 parallel to the eaves of the roof, and a depth direction 100 b ( (Short direction) is adapted to extend along the eaves direction 5 of the roof.
- Each metal roof material 1 is fastened to the roof base by driving a fastening member such as a screw or a nail.
- the building-side metal roofing material 1 is arranged on the roof base while being superimposed on the eaves-side metal roofing material 1.
- the top plate portion 101 of the main body portion 100 includes a plurality of driving display portions 2 that are spaced apart from each other along the width direction 100 a of the main body portion 100, and the periphery of each driving display portion 2. And protruding ribs 3 arranged on the surface.
- the driving display unit 2 and the protruding rib 3 will be described in more detail.
- FIG. 6 is a plan view showing the area VI of FIG. 1 in an enlarged manner
- FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6
- FIG. 8 is a plane showing a circle that fits in the internal area 3a of FIG. FIG.
- the driving display unit 2 is a configuration for representing a position where a binding member is driven into the metal roofing material 1.
- the driving display portion 2 of the present embodiment is configured by a concave portion having a circular shape in plan view.
- the driving display unit 2 may take another mode in which the operator can visually or tactilely recognize the driving position of the binding member, such as a protrusion, an opening, or a printed or engraved symbol.
- the protruding rib 3 is constituted by a plurality of protruding portions 30 arranged along a rectangular side extending long in the depth direction 100b of the main body portion 100.
- the driving display unit 2 is disposed in the inner region 3 a of the protruding rib 3. That is, the metal roofing material 1 of the present embodiment is configured such that the fastening member is driven into the inner region 3a of the protruding rib 3, and when roofing (creating a roof) as shown in FIG. Inserts the fastening member into the inner region 3 a of the protruding rib 3.
- each protrusion 30 is configured by projecting a part of a metal plate constituting the top plate 101.
- the vertical inner wall 30a of each protrusion 30 extends in a direction intersecting with the wall surface of the inner region 3a of the protruding rib 3, and is fastened to the inner region 3a (the driving display portion 2) of the protruding rib 3.
- the projecting rib 3 is provided with a plurality of openings 31 that communicate the outer region 3 b and the inner region 3 a of the projecting rib 3.
- the four openings 31 are formed by removing the protrusions 30 at both ends of the upper and lower sides of the rectangle.
- a surface under the same conditions as the surfaces of the inner region 3 a and the outer region 3 b of the protruding rib 3 is extended.
- the openings 31 positioned at both ends of the lower side of the rectangle constitute an eaves-side opening 31E positioned on the eaves side of the protruding rib 3 when the metal roofing material 1 is arranged on the roof base.
- the eaves side means the downstream side in the flow direction of the roof.
- the ratio of the opening 31 in the protruding rib 3 (hereinafter referred to as the opening ratio) is preferably 50% or less.
- the center angle corresponding to the opening is when a circle having the largest radius that fits in the inner region 3a is drawn as shown in FIG. 8, and a straight line passing through the center of the circle and the inner ends of each opening 31a is drawn. Further, the angles ⁇ 1 to ⁇ n between the straight lines corresponding to the respective openings 31a.
- the four opening portions 31a are provided in the protruding rib 3 as shown in FIG.
- the opening ratio (%) ⁇ ( ⁇ 1 + ⁇ 2 + ⁇ 3 + ⁇ 4) ⁇ 360 ⁇ ⁇ 100.
- the circle that fits in the inner region 3 a means a circle that is located inside the protruding rib 3 and that does not extend beyond the vertical inner wall 30 a of all the protruding portions 30.
- N is an arbitrary positive number corresponding to the number of openings 31.
- the height H of the protrusion 30 is preferably 0.2 mm or more.
- the height H corresponds to the distance between the surface of the inner region 3 a or the outer region 3 b of the projecting rib 3 and the top of the projecting portion 30.
- the height of the protrusion 30 is 0.2 mm or more, the deformation of the front substrate 10 due to the driving of the binding member can be suppressed to a small level.
- the value (W / H) obtained by dividing the width W of the protrusion 30 by the height H of the protrusion 30 is preferably 3 or more.
- the width W corresponds to the distance between the vertical inner wall 30a of the protrusion 30 and the vertical outer wall.
- the shortest distance L from the center position of the inner region 3a to the protrusion 30 is 5 mm or more and 20 mm or less.
- the shortest distance L from the center position of the inner region 3a to the protrusion 30 can be defined by the radius of a circle having the largest radius that fits in the inner region 3a (see FIG. 8). As will be described later with reference to examples, when the shortest distance L is 5 mm or more and 20 mm or less, the deformation of the front substrate 10 due to the driving of the binding member can be suppressed to a small level.
- FIG. 9 is an explanatory view showing a modification of the protruding rib 3 of FIG.
- the protrusions 30 constituting the protruding ribs 3 may be arranged along a circle.
- the protruding rib 3 may be constituted by one protruding portion 30, and (b) to (d) and FIG.
- the protruding rib 3 may be constituted by a plurality of protruding portions 30.
- a plurality of openings 31 may be arranged to face each other with the center position of the protruding rib 3 interposed therebetween, or FIG. 9 (e). And as shown to (f), the one opening part 31 may be provided so that the opening rate of the protruding rib 3 may be 50%. As shown in FIG. 9 (h), a part of the opening 31 can be used as the eaves-side opening 31E while the opening ratio of the protruding rib 3 is set to 50%.
- FIG. 10 is an explanatory view showing a further modification of the protruding rib 3 of FIG.
- the protrusions 30 constituting the protruding rib 3 may be disposed along a square side.
- the protruding rib 3 may be constituted by one protrusion 30.
- FIGS. 10 (b) to 10 (d) and FIGS. 10 (f) to (h) As shown, the protruding rib 3 may be constituted by a plurality of protrusions 30.
- a plurality of openings 31 may be arranged to face each other with the center position of the protruding rib 3 interposed therebetween.
- one opening 31 may be provided so that the opening ratio of the protruding rib 3 is 50%.
- a part of the opening 31 can be used as the eaves-side opening 31E while the opening ratio of the protruding rib 3 is set to 50%.
- FIG. 11 is an explanatory view showing still another modified example of the protruding rib 3 of FIG.
- the projecting portions 30 constituting the projecting rib 3 may be disposed along the sides of a triangle, a rhombus (square), a pentagon, and an octagon.
- the protrusion 30 may be arrange
- an opening 31 can be provided.
- the inventor made a prototype of the metal roofing material 1 as a test material under the following conditions.
- the material of the front substrate 10 was a coated hot-dip Zn-55% Al-plated steel sheet, a painted hot-Zn-6% Al-3% Mg-plated steel sheet, or a painted hot-Al-plated steel sheet.
- As the back substrate 11 0.2 mm glass fiber paper, 0.2 mm Al vapor-deposited paper, 0.2 mm PE resin film, 0.1 mm Al foil or 0.27 mm painted hot-dip Zn plated steel sheet was used.
- As the core material 12 a two-component mixed type foamed resin was used. The mixing ratio of the polyol component and the isocyanate, phenol or nurate component was 1: 1 by weight.
- the back base material 11 is arranged on the back side of the front base material 10 so as to close the opening of the main body 100, and a commercially available high-pressure injector is used.
- a foamed resin was injected into the gap between the main body 100 of the front substrate 10 and the back substrate 11. Resin foaming is carried out for 2 minutes in a mold whose temperature is adjusted to 70 ° C by circulating hot water, and then the roofing material is taken out of the mold and allowed to stand at room temperature of 20 ° C for 5 minutes to complete foaming of the resin. It was.
- the metal plate extending from the lower end of the main body 100 toward the outside of the main body 100 is cut so that the protruding width of the flange is 5 mm, and the metal plate is formed into a predetermined shape by the bender.
- the final size of the metal roofing material 1 was 414 mm ⁇ 910 mm.
- the final thickness of the roofing material was in the range of 3 mm to 8 mm.
- the shape of the protruding rib 3, the presence or absence of the eaves-side opening 31E, the height H of the protruding portion 30, the shortest distance L from the center position of the inner region 3a to the protruding portion 30, the protruding portion 30 The value obtained by dividing the width W of the protrusion 30 by the height H of the protrusion 30 and the opening ratio (ratio occupied by the opening 31 in the protruding rib 3) are changed, and the following (1) evaluation of the weight of the roofing material, (2) Evaluation of depressions at the time of binding, (3) evaluation of the occurrence of coating film cracks, and (4) evaluation of ease of rainwater flow were performed. The results are shown in the following table.
- the unit weight of the roofing material is 250 N / m 2 or more, and the roofing material weight is evaluated as ⁇ . Became.
- the unit weight of the roofing material could be less than 250 N / m 2 by setting the thickness of the metal plate constituting the front substrate 10 to 0.5 mm or less. From this result, it was confirmed that the thickness of the metal plate constituting the surface base material 10 is preferably 0.5 mm or less.
- the shortest distance L becomes small, when the roof material is fastened with a nail or a screw with a hammer, a driver, or an electric tool, the protrusion 30 may become a barrier and hinder the fastening work.
- the shortest distance L is preferably 5 mm or more.
- the projecting rib 3 including at least one projecting portion 30 disposed along a polygonal side or along a circle. Is provided on the top plate portion 101 of the main body portion 100, and the fastening member is driven into the inner region 3a of the protruding rib 3, so that the dent or buckling of the front substrate 10 due to the driving of the binding member is reduced. Can do.
- the projecting rib 3 is provided with at least one opening 31 for communicating the outer region 3b and the inner region 3a of the projecting rib 3, the upper portion of the projecting rib 3 is another metal roof material. Even if it is blocked by the above, it is possible to ensure the flow of air to and from the inside and outside of the protruding rib 3. Thereby, even if moisture such as rainwater enters the internal region 3a of the protruding rib 3, evaporation of the water can be promoted, and the possibility of moisture remaining in the internal region 3a of the protruding rib 3 is reduced. be able to.
- At least one opening 31 includes an eaves-side opening 31E located on the eave side of the projecting rib 3 when the metal roofing material 1 is disposed on the roof base, the projecting rib 3 Moisture that has entered the inner region 3a can escape to the outer region 3b of the projecting rib 3 through the eaves-side opening 31E, and the possibility that moisture will remain in the inner region 3a of the projecting rib 3 is reduced. Can do.
- the ratio (opening ratio) occupied by the opening 31 in the protruding rib 3 is 50% or less, the deformation of the front substrate 10 due to the driving of the binding member can be suppressed to a small level.
- the height H of the protrusion 30 is 0.2 mm or more, the deformation of the surface base material 10 due to the driving of the binding member can be suppressed to be small.
- the coating film formed on the surface of the metal plate constituting the top plate portion 101 is applied. The occurrence of cracks can be avoided more reliably.
- the shortest distance from the center position of the inner region 3a to the protrusion 30 is not less than 5 mm and not more than 20 mm, the deformation of the surface base material 10 due to the driving of the binding member can be suppressed to a small level.
- the thickness of the metal plate constituting the front substrate 10 is 0.5 mm or less, it is possible to more reliably avoid the weight of the metal roofing material 1 becoming too large.
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Abstract
Description
実施の形態.
図1は本発明の実施の形態による金属屋根材1を示す正面図であり、図2は図1の金属屋根材1を示す背面図であり、図3は図1の線III-IIIに沿う金属屋根材1の断面図であり、図4は図1の本体部100の別態様を示す説明図であり、図5は図1の金属屋根材1を用いた屋根葺き構造及び屋根葺き方法を示す説明図である。
開口率(%)=(開口部に対応する中心角の総和÷360)×100
開口部に対応する中心角とは、図8のように内部領域3aに収まる最も大きな半径を有する円を描くとともに、その円の中心と各開口部31aの内両端とを通る直線を描いた際に、各開口部31aに対応する直線間の角度θ1・・・θnである。図8のように4つの開口部31aが突状リブ3に設けられた態様の場合、開口率(%)={(θ1+θ2+θ3+θ4)÷360}×100と表される。なお、内部領域3aに収まる円とは、突状リブ3の内側に位置する円であって、すべての突部30の縦内壁30aを超えて延在しない円を意味する。また、nは開口部31の数に対応する任意の正数である。後に実施例を挙げて説明するように、突状リブ3の開口率が50%以下であることで、緊結部材の打込みによる表基材10の変形を小さく抑えることができる。
裏基材11のとしては、0.2mmガラス繊維紙、0.2mmAl蒸着紙、0.2mmPE樹脂フィルム、0.1mmAl箔又は0.27mm塗装溶融Znめっき鋼板を使用した。
芯材12としては、2液混合型の発泡樹脂を使用した。ポリオール成分とイソシアネート、フェノールもしくはヌレート成分の混合比率は重量比で1:1とした。
屋根材の単重を計測し、以下の基準により評価した。なお、本評価基準は、標準的な130N/m2の太陽電池モジュールが屋根に搭載されたことを想定し、屋根材を含む屋根全体の重量から以下の評価基準により評価した。
○:屋根材単重が250N/m2未満
△:屋根材単重が250N/m2以上
緊結部材として、市販の山喜産業株式会社製ベストビス(径4.0mmφ×長さ35mm)とインパクトドライバー(株式会社マキタ製TD136D)とを使用して、2枚重ねの屋根材を緊結した。緊結の窪みは、緊結した上側の屋根材の窪みを隙間ゲージによって測定し、以下の評価基準により評価した。
○:緊結時の窪みが2mm未満
△:緊結時の窪みが2mm以上
突部30を形成するときに塗装鋼板に発生する塗膜クラックを10倍の拡大鏡により目視で観察し、以下の評価基準により評価した。
○:塗膜クラックの発生が認められないか、又は軽微なクラックが認められる
△:著しい塗膜クラックの発生が認められる
屋根材を勾配15°に傾斜させ、屋根材の上部に1000mLの水道水を流し、突状リブ3の内部領域3aに残る状況を目視により以下の評価基準で評価した。
○:水が淀みなく流れ、内部領域に水がほとんど残っていない
△:水が残っている
Claims (9)
- 金属板を素材とし箱形に形成された本体部を有する表基材と、前記本体部の開口を塞ぐように前記表基材の裏側に配置された裏基材と、前記本体部と前記裏基材との間に充填された芯材とを備え、前記本体部への緊結部材の打込みにより屋根下地に緊結される金属屋根材であって、
多角形の辺に沿って配設されるか又は円に沿って配設された少なくとも1つの突部からなる突状リブが前記本体部の天板部に設けられており、前記突状リブの内部領域に前記緊結部材が打込まれるように構成されている、
金属屋根材。 - 前記突状リブには、前記突状リブの外部領域と前記内部領域とを連通する少なくとも1つの開口部が設けられている、
請求項1記載の金属屋根材。 - 前記少なくとも1つの開口部は、前記金属屋根材が前記屋根下地の上に配置された際に前記突状リブの軒側に位置する軒側開口部を含んでいる、
請求項2記載の金属屋根材。 - 前記突状リブにおいて前記開口部が占める割合が50%以下である、
請求項2又は請求項3に記載の金属屋根材。 - 前記突部の高さが0.2mm以上である、
請求項1から請求項4までのいずれか一項に記載の金属屋根材。 - 前記突部の幅を前記突部の高さで除算した値が3以上である、
請求項5記載の金属屋根材。 - 前記内部領域の中心位置から前記突部までの最短距離が5mm以上かつ20mm以下である、
請求項1から請求項6までのいずれか一項に記載の金属屋根材。 - 前記表基材を構成する前記金属板の板厚が0.5mm以下である、
請求項1から請求項7までのいずれか一項に記載の金属屋根材。 - 金属板を素材とし箱形に形成された本体部を有する表基材と、前記本体部の開口を塞ぐように前記表基材の裏側に配置された裏基材と、前記本体部と前記裏基材との間に充填された芯材とを備え、多角形の辺に沿って配設されるか又は円に沿って配設された少なくとも1つの突部からなる突状リブが前記本体部の天板部に設けられた金属屋根材を用いた屋根葺き方法であって、
前記金属屋根材を屋根下地の上に配置する工程と、
前記突状リブの内部領域に緊結部材を打ち込んで前記金属屋根材を前記屋根下地に緊結する工程と
を含む、
屋根葺き方法。
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