JP6770343B2 - roof - Google Patents

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JP6770343B2
JP6770343B2 JP2016119177A JP2016119177A JP6770343B2 JP 6770343 B2 JP6770343 B2 JP 6770343B2 JP 2016119177 A JP2016119177 A JP 2016119177A JP 2016119177 A JP2016119177 A JP 2016119177A JP 6770343 B2 JP6770343 B2 JP 6770343B2
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eaves
hanging tree
taruki
roof
top plate
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JP2017223048A (en
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嵩広 藤井
嵩広 藤井
敬 西村
敬 西村
元伸 前川
元伸 前川
照久 宮島
照久 宮島
松田 知也
知也 松田
和宏 佐分利
和宏 佐分利
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Takenaka Corp
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Takenaka Corp
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Description

本発明は、屋根に関する。 The present invention relates to a roof.

木造建築では、屋根材が取付けられる垂木が軒桁から庇先端部まで跳ね出している。このため、屋根の庇先端部の見付せいは垂木のせいに依存する。庇先端部の見付せいを小さくするためには、下記特許文献1に示すように垂木を切欠いて先端部のせいを小さくする方法もあるが、この方法では、垂木の加工に手間がかかる。 In wooden construction, rafters to which roofing materials are attached protrude from the eaves girder to the tip of the eaves. For this reason, the finding of the eaves tip of the roof depends on the rafters. In order to reduce the pitsuke of the eaves tip, as shown in Patent Document 1 below, there is a method of cutting out the rafters to reduce the pitsuke of the tip, but this method takes time and effort to process the rafters.

特開2004−218324号公報Japanese Unexamined Patent Publication No. 2004-218324

本発明は上記事実を考慮して、垂木に複雑な加工を施さずに屋根の庇先端部の見付せいを小さくすることを目的とする。 In consideration of the above facts, an object of the present invention is to reduce the finding of the eaves tip of the roof without performing complicated processing on the rafters.

請求項1の屋根は、建物の軒桁に支持され、前記軒桁より外側へ跳ね出した下垂木と、前記下垂木の上方に設けられ、前記下垂木より外側へ跳ね出し前記下垂木よりせいが小さい上垂木と、前記上垂木の上に設けられた屋根材と、を有する。 Roof according to claim 1 is supported on eaves digit buildings, and Shimotaruki that Hanedashi outwardly from the pole plate, provided above the Shimotaruki, blame than the Shimotaruki Hanedashi said outwardly from Shimotaruki It has a small hanging tree and a roofing material provided on the hanging tree.

請求項1の屋根では、軒桁に支持された下垂木の上方又は側方に上垂木を設け、下垂木より外側へ跳ね出した上垂木のせいを下垂木のせいより小さくすることで、屋根庇先端の見付せいを小さくできる。つまり、垂木を屋根庇先端まで跳ね出した場合の垂木のせいと屋根材の厚みの合計である見付せいより、上垂木のせいと屋根材の厚みの合計である見付せいが小さくなる。 In the roof of claim 1, a hanging tree is provided above or to the side of the hanging tree supported by the eaves girder, and the cause of the hanging tree that protrudes outward from the hanging tree is made smaller than the cause of the hanging tree. The finding of the tip of the eaves can be reduced. That is, the sum of the rafters and the thickness of the roofing material is smaller than the sum of the rafters and the thickness of the roofing material when the rafters are projected to the tip of the roof eaves.

また、せいの小さい上垂木を下垂木よりも外側へ跳ね出すだけで屋根の庇先端部の見付せいを小さくできるので、下垂木に複雑な加工を施す必要がない。
請求項2の屋根は、建物の軒桁に支持され、前記軒桁より外側へ跳ね出した下垂木と、前記下垂木の側方に設けられ、前記下垂木より外側へ跳ね出し前記下垂木よりせいが小さい上垂木と、前記上垂木の上に設けられた屋根材と、を有する。
In addition, it is not necessary to perform complicated processing on the hanging tree because the finding of the tip of the eaves of the roof can be reduced by simply projecting the small hanging tree to the outside of the hanging tree.
The roof of claim 2 is supported by the eaves girder of the building and is provided on the side of the hanging tree that protrudes outward from the eaves girder and the hanging tree that is provided on the side of the hanging tree and protrudes outward from the hanging tree. It has a small hanging tree and a roofing material provided on the hanging tree.

請求項3の屋根は、請求項1又は請求項2に記載の屋根において、前記上垂木の下面には軒天板が張られ、前記上垂木の庇先端側には鼻隠し板が設けられている。 The roof according to claim 3 is the roof according to claim 1 or 2 , wherein an eaves top plate is stretched on the lower surface of the hanging tree and a nose hiding board is provided on the eaves tip side of the hanging tree. There is.

請求項3の屋根によると、上垂木が外から見えないので見た目がよい。 According to the roof of claim 3 , the hanging tree is not visible from the outside, so it looks good.

請求項4の屋根は、請求項3に記載の建物において、前記屋根材と前記軒天板の間には断熱材が配置されている。 As for the roof of claim 4 , in the building according to claim 3 , a heat insulating material is arranged between the roof material and the eaves top plate.

請求項4の屋根によると、軒天板の結露を抑制できる。 According to the roof of claim 4 , dew condensation on the eaves top plate can be suppressed.

本発明に係る屋根によると、垂木に複雑な加工を施さずに屋根の庇先端部の見付せいを小さくすることができる。 According to the roof according to the present invention, it is possible to reduce the finding of the eaves tip of the roof without performing complicated processing on the rafters.

本発明の実施形態に係る屋根の庇部分を示した側断面図である。It is a side sectional view which showed the eaves part of the roof which concerns on embodiment of this invention. 本発明の実施形態に係る屋根の庇根元部分を示す、図1における2−2線断面図である。It is a cross-sectional view of line 2-2 in FIG. 1 which shows the eaves base part of the roof which concerns on embodiment of this invention. 本発明の実施形態に係る屋根の庇先端部分の詳細を示す、図1における3−3線断面図である。FIG. 3 is a sectional view taken along line 3-3 in FIG. 1 showing details of a roof eaves tip portion according to an embodiment of the present invention. 本発明の実施形態に係る屋根の庇先端部分を示す、部分拡大断面図である。It is a partially enlarged sectional view which shows the eaves tip portion of the roof which concerns on embodiment of this invention. (A)は本発明の実施形態に係る下垂木の端部が軒桁の上部に配置された変形例を示す側断面図であり、(B)は下垂木の端部が軒桁の内側面に固定された変形例を示す側断面図であり、(C)は下垂木が矩形状の1つの部材で構成された変形例を示す正面断面図である。(A) is a side sectional view showing a modified example in which the end of the hanging tree according to the embodiment of the present invention is arranged above the eaves girder, and (B) is the inner side surface of the eaves girder with the end of the hanging tree. It is a side sectional view which shows the modified example fixed to, and (C) is the front sectional view which shows the modified example which the hanging tree is composed of one member having a rectangular shape. (A)は本発明の実施形態に係る上垂木が下垂木の側方に配置された変形例を示す正面断面図であり、(B)は側断面図である。(A) is a front sectional view showing a modified example in which the upper taruki according to the embodiment of the present invention is arranged on the side of the hanging tree, and (B) is a side sectional view. (A)は本発明の実施形態に係る上垂木のピッチが下垂木のピッチよりも細かくされた変形例を示す正面断面図であり、(B)は側断面図である。(A) is a front sectional view showing a modified example in which the pitch of the upper taruki according to the embodiment of the present invention is made finer than the pitch of the hanging tree, and (B) is a side sectional view. 本発明の実施形態に係る屋根の効果を説明するための比較例を示す立断面図である。It is a vertical sectional view which shows the comparative example for demonstrating the effect of the roof which concerns on embodiment of this invention.

図1には、本発明の実施形態に係る屋根20の庇部分の断面図が示されている。屋根20は、建物10の軒桁12に支持された下垂木30と、下垂木30の上方に設けられ、下垂木30より外側(軒桁12よりも屋外側)へ跳ね出す上垂木40と、上垂木40の上に設けられた屋根材50と、を備えている。 FIG. 1 shows a cross-sectional view of the eaves portion of the roof 20 according to the embodiment of the present invention. The roof 20 includes a hanging tree 30 supported by the eaves girder 12 of the building 10, a hanging tree 40 provided above the hanging tree 30 and projecting outward from the hanging tree 30 (outdoor side of the eaves girder 12). It includes a roofing material 50 provided on the hanging tree 40.

上垂木40は下垂木30に沿って延設されており、屋根20の棟部分(頂部)においては、下垂木30及び上垂木40が、軒桁12と平行な方向へ延設された図示しない棟木に支持されている。 The upper rafter 40 is extended along the hanging tree 30, and in the ridge portion (top) of the roof 20, the hanging tree 30 and the upper rafter 40 are extended in a direction parallel to the eaves girder 12, which is not shown. It is supported by the purlin.

なお、以下の説明において、屋根20における軒桁12よりも内側の部分(図1では左側)を本体部22、軒桁12の外側の部分(図1では右側)を庇24と称し、さらに庇24のうち下垂木30が配置されている部分を庇根元部24A、下垂木30が配置されていない部分を庇先端部24Bと称する。 In the following description, the portion of the roof 20 inside the eaves girder 12 (left side in FIG. 1) is referred to as the main body portion 22, the portion outside the eaves girder 12 (right side in FIG. 1) is referred to as eaves 24, and further eaves. Of the 24, the portion where the hanging tree 30 is arranged is referred to as an eaves root portion 24A, and the portion where the hanging tree 30 is not arranged is referred to as an eaves tip portion 24B.

(下垂木)
図1に示すように、下垂木30は建物10の軒桁12の上に載置され、下垂木30の先端30Eは軒桁12よりも外側(軒桁12よりも屋外側)に配置され、下垂木30の軸方向に対して傾斜して形成されている。互いに隣接する下垂木30の間で、軒桁12の上部には、軒桁12の延設方向に沿って面戸板18が配置され、軒桁12と後述する軒天板60との間の隙間が塞がれている。
(Shimotaruki)
As shown in FIG. 1, the hanging tree 30 is placed on the eaves girder 12 of the building 10, and the tip 30E of the hanging tree 30 is arranged outside the eaves girder 12 (outdoor side of the eaves girder 12). It is formed so as to be inclined with respect to the axial direction of the hanging tree 30. Between the hanging trees 30 adjacent to each other, a face door plate 18 is arranged on the upper part of the eaves girder 12 along the extending direction of the eaves girder 12, and a gap between the eaves girder 12 and the eaves top plate 60 described later. Is blocked.

なお、本実施形態において下垂木30の先端30Eは軒桁12よりも外側に配置されているが、本発明の実施形態はこれに限られない。例えば図5(A)に示す下垂木31のように、先端31Eを軒桁12の上部に配置して、軒桁12の上部で軒桁12の延設方向に沿って通し材とされた面戸板19を先端31Eに固定してもよい。この場合、下垂木31の先端31Eが面戸板18により隠されるので、屋外に下垂木31が露出せず、庇24の見付せいを小さくすることができる。 In the present embodiment, the tip 30E of the hanging tree 30 is arranged outside the eaves girder 12, but the embodiment of the present invention is not limited to this. For example, as in the hanging tree 31 shown in FIG. 5A, a surface in which the tip 31E is arranged above the eaves girder 12 and is used as a through material at the upper part of the eaves girder 12 along the extending direction of the eaves girder 12. The door plate 19 may be fixed to the tip 31E. In this case, since the tip 31E of the hanging tree 31 is hidden by the face door plate 18, the hanging tree 31 is not exposed outdoors, and the finding of the eaves 24 can be reduced.

また、例えば図5(B)に示す下垂木33のように、先端33Eを軒桁12の内側面に固定して、面戸板のない構成としてもよい。この場合、屋根を構成する部品点数を減らすことができる。 Further, for example, as in the hanging tree 33 shown in FIG. 5B, the tip 33E may be fixed to the inner side surface of the eaves girder 12 so as to have no face door plate. In this case, the number of parts constituting the roof can be reduced.

なお、庇24の「見付せい」とは、図1に示すように、後述する上垂木40の材軸方向と直交する方向(図1に一点鎖線R2で示す方向)に沿った庇24の厚みを示しており、庇根元部24Aにおいては、下垂木30の下端から後述する屋根材50の上端までの厚みが見付せいH3とされ、庇先端部24Bにおいては、後述する軒天板60の下端から屋根材50の上端までの厚みが見付せいH4とされている。 As shown in FIG. 1, the "Mitsuke" of the eaves 24 refers to the eaves 24 along a direction orthogonal to the material axis direction of the upper hanging tree 40 (the direction indicated by the one-point chain line R2 in FIG. 1). The thickness is shown. In the eaves root portion 24A, the thickness from the lower end of the hanging tree 30 to the upper end of the roofing material 50 described later is determined to be H3, and in the eaves tip portion 24B, the eaves top plate 60 described later. The thickness from the lower end of the roof material 50 to the upper end of the roofing material 50 is determined to be H4.

図2に示すように、下垂木30は、芯材32と、芯材32を両側から挟み込んで保持する一対の脇材34と、を備えており、脇材34は芯材32よりもせいが大きく形成され、図示しないビスを用いて芯材32に固定されている。このため、下垂木30は断面形状が略コの字型に形成されている。 As shown in FIG. 2, the hanging tree 30 includes a core material 32 and a pair of side members 34 that sandwich and hold the core material 32 from both sides, and the side members 34 are more screwed than the core material 32. It is formed large and is fixed to the core material 32 using screws (not shown). Therefore, the hanging tree 30 has a substantially U-shaped cross section.

なお、本実施形態における「せい」とは、下垂木30及び上垂木40の材軸方向(図1に一点鎖線R1で示す方向)と直交する方向(図1に一点鎖線R2で示す方向)に沿った下垂木30(下垂木30を構成する脇材34)及び上垂木40の厚みを示しており、図1、図2において、それぞれH1及びH2で示されている。 The "sei" in the present embodiment means a direction orthogonal to the material axis direction of the hanging tree 30 and the upper hanging tree 40 (the direction indicated by the alternate long and short dash line R1 in FIG. 1) (the direction indicated by the alternate long and short dash line R2 in FIG. 1). The thicknesses of the hanging tree 30 (side members 34 constituting the hanging tree 30) and the hanging tree 40 along the same direction are shown, and are shown by H1 and H2 in FIGS. 1 and 2, respectively.

芯材32、脇材34はそれぞれ規格寸法の無垢の木材とされ、本実施形態においては芯材32はツーバイフォー材(約38mm×89mm)、脇材34はツーバイエイト材(約38mm×184mm)とされている。 The core material 32 and the side material 34 are made of solid wood of standard dimensions, respectively. In this embodiment, the core material 32 is a two-by-four material (about 38 mm × 89 mm), and the side material 34 is a two-by-eight material (about 38 mm × 184 mm). Has been done.

なお、本実施形態において下垂木30は軒桁12(図1参照)の延設方向に約900mmピッチで配置されているが、このピッチは変更してもよく、例えば900mmよりも大きくする場合は下垂木30が負担する荷重が増えるので、芯材32としてツーバイシックス材(約38mm×140mm)を用いたり、脇材34としてツーバイテン材(約38mm×235mm)を用いたりして、下垂木30の強度を高めることができる。 In the present embodiment, the hanging trees 30 are arranged at a pitch of about 900 mm in the extending direction of the eaves girder 12 (see FIG. 1), but this pitch may be changed, for example, when it is larger than 900 mm. Since the load borne by the hanging tree 30 increases, a two-by-six material (about 38 mm × 140 mm) is used as the core material 32, or a two-by-ten material (about 38 mm × 235 mm) is used as the side material 34 of the hanging tree 30. The strength can be increased.

また、ピッチを900mmより小さくする場合は下垂木30が負担する荷重が減るので脇材34としてツーバイシックス材、ツーバイフォー材などを用いて、下垂木30のせいを小さくすることができる。 Further, when the pitch is made smaller than 900 mm, the load borne by the hanging tree 30 is reduced, so that a two-by-six material, a two-by-four material, or the like can be used as the side member 34 to reduce the cause of the hanging tree 30.

なお、本実施形態において下垂木30は芯材32、脇材34を組み合わせて略コの字型に構成されているが、本発明の実施形態はこれに限られない。例えば図5(C)に示す下垂木35のように、1つの部材で矩形状に構成してもよい。このように構成することで、下垂木の加工を簡略化できる。さらに、下垂木30を形成する材質としては規格寸法の無垢の木材に限られず、必要な材料強度や寸法に応じて、規格外寸法としてもよいし、集成材、樹脂と粉末木材とを混錬凝結した合成木、角型鋼管、溝形鋼などを用いてもよい。 In the present embodiment, the hanging tree 30 is formed in a substantially U shape by combining the core material 32 and the side material 34, but the embodiment of the present invention is not limited to this. For example, as in the hanging tree 35 shown in FIG. 5C, one member may be formed in a rectangular shape. With this configuration, the processing of the hanging tree can be simplified. Further, the material for forming the hanging tree 30 is not limited to solid wood having standard dimensions, and may be non-standard dimensions depending on the required material strength and dimensions, and laminated wood, resin and powdered wood are kneaded. Fused synthetic wood, square steel pipe, channel steel and the like may be used.

(軒天板)
下垂木30には軒天板60が載置され、軒天板60の端部が下垂木30の脇材34に上からビス62で固定されている。また、図3に示すように、下垂木30がない庇先端部において軒天板60の端部は、上垂木40に下からビス66で固定されている。軒天板60は構造用合板によって形成されており、隣接する下垂木30及び上垂木40に両端が固定された状態で、構造上及び意匠上支障となる撓みを生じない程度の剛性を備えている。
(Eaves top plate)
The eaves top plate 60 is placed on the hanging tree 30, and the end portion of the eaves top plate 60 is fixed to the side member 34 of the hanging tree 30 with screws 62 from above. Further, as shown in FIG. 3, at the tip of the eaves without the hanging tree 30, the end of the eaves top plate 60 is fixed to the upper hanging tree 40 with screws 66 from below. The eaves top plate 60 is formed of structural plywood, and has rigidity to the extent that it does not cause bending that hinders the structure and design in a state where both ends are fixed to the adjacent hanging tree 30 and the hanging tree 40. There is.

なお、本実施形態においては軒天板60の表面が露出しているが、意匠上必要があれば、軒天板60の表面を、図2に点線で示すように仕上げ材64で被覆してもよい。仕上げ材64の材質としては、ケイ酸カルシウム板、木板や金属板などを適宜用いることができる。 In the present embodiment, the surface of the eaves top plate 60 is exposed, but if necessary for the design, the surface of the eaves top plate 60 is covered with a finishing material 64 as shown by the dotted line in FIG. May be good. As the material of the finishing material 64, a calcium silicate board, a wooden board, a metal board, or the like can be appropriately used.

また、本発明の実施形態においては軒天板60は必ずしも必要ではなく、軒天板60を設けない構成とすることもできる。軒天板60を設けなければ、上垂木40が露出するが、庇先端部の見付せいを小さくすることができる。 Further, in the embodiment of the present invention, the eaves top plate 60 is not always necessary, and the eaves top plate 60 may not be provided. If the eaves top plate 60 is not provided, the hanging tree 40 is exposed, but the finding of the tip of the eaves can be reduced.

(上垂木)
図2に示すように、軒天板60の上部には上垂木40が配置され、上垂木40と下垂木30とで軒天板60の端部を挟み込んでいる。上垂木40は下垂木30の芯材32にビス42で固定されている。上垂木40は、どの面を底面として配置してもせいが等しくなるように正方形の無垢の木材で形成されており、施工性が高められている。なお、上垂木40を形成する材質としては、下垂木30と同様、無垢の木材に限られず、集成材、樹脂と粉末木材とを混錬凝結した合成木、角型鋼管、溝形鋼などを用いることができる。
(Kamitaruki)
As shown in FIG. 2, a hanging tree 40 is arranged on the upper part of the eaves top plate 60, and the end portion of the eaves top plate 60 is sandwiched between the upper hanging tree 40 and the hanging tree 30. The upper taruki 40 is fixed to the core material 32 of the lower taruki 30 with screws 42. The upper taruki 40 is made of square solid wood so that the sill is equal regardless of which side is arranged as the bottom surface, and the workability is improved. As with the hanging tree 30, the material for forming the upper hanging tree 40 is not limited to solid wood, but laminated wood, synthetic wood obtained by kneading and condensing resin and powdered wood, square steel pipe, channel steel, and the like. Can be used.

上垂木40のせいH2は、図1に示すように、上垂木40が、屋根材50及び後述する野地板52の荷重を支持し、かつ下面に軒天板60が張られた状態で構造上及び意匠上支障となる撓みが生じない寸法とされている。なお、庇先端部24Bの跳ね出し幅はL1とされ、跳ね出し幅L1に下垂木30の軒桁12からの跳ね出し幅L2を加えた値が、庇24の軒桁12からの跳ね出し幅L3とされている。 As shown in FIG. 1, the upper taruki 40 is structurally in a state where the upper taruki 40 supports the load of the roofing material 50 and the field plate 52 described later, and the eaves top plate 60 is stretched on the lower surface. The dimensions are such that there is no bending that hinders the design. The protrusion width of the eaves tip 24B is L1, and the value obtained by adding the protrusion width L1 from the eaves girder 12 of the hanging tree 30 to the protrusion width L1 is the protrusion width from the eaves girder 12 of the eaves 24. It is said to be L3.

上垂木40は屋根材50及び野地板52の荷重を支持している。これに対し下垂木30は、屋根材50、野地板52、上垂木40、軒天板60等の荷重を支持しており、上垂木40よりも支持する荷重が大きい。このため、下垂木30のせいH1は、上垂木40のせいH2よりも大きい。換言すると、上垂木40は、下垂木30よりも負担する荷重が小さいので、せいH1をせいH2と比較して小さくすることができる。 The upper taruki 40 supports the load of the roofing material 50 and the field board 52. On the other hand, the hanging tree 30 supports the load of the roofing material 50, the field board 52, the upper hanging tree 40, the eaves top board 60, etc., and the supporting load is larger than that of the upper hanging tree 40. Therefore, the cause H1 of the hanging tree 30 is larger than the cause H2 of the upper hanging tree 40. In other words, since the upper taruki 40 bears a smaller load than the lower taruki 30, the sei H1 can be made smaller than the sei H2.

図4に示すように、上垂木40の先端40Eは上垂木40の延設方向と直交する方向(図1における軒桁12と平行な方向)に延設された垂木受け44にビス46で接合されている。さらに、垂木受け44の側面44E及び軒天板60の端面60Eをそれぞれ覆うように、鼻隠し板48が垂木受け44にビス49で固定されている。鼻隠し板48は軒先の剛性を高めかつ意匠性を向上させるために硬度の高い化粧木により形成され、鼻隠し板48の端面48Eは上垂木の材軸方向に対して傾斜して形成されている。 As shown in FIG. 4, the tip 40E of the upper rafter 40 is joined to the taruki receiver 44 extended in the direction orthogonal to the extending direction of the upper rafter 40 (the direction parallel to the eaves girder 12 in FIG. 1) with a screw 46. Has been done. Further, the nose cover plate 48 is fixed to the rafter receiver 44 with screws 49 so as to cover the side surface 44E of the rafter receiver 44 and the end surface 60E of the eaves top plate 60, respectively. The nose concealment plate 48 is formed of a decorative wood having a high hardness in order to increase the rigidity of the eaves and improve the design, and the end surface 48E of the nose concealment plate 48 is formed so as to be inclined with respect to the material axis direction of the upper rafters. There is.

(屋根材)
図2に示すように、上垂木40の上部には野地板52を介して屋根材50が載置されている。野地板52は耐水合板とされ、端部が上垂木40にビス54で固定されている。屋根材50はアルミニウム亜鉛合金メッキ鋼板とされ、野地板52との間には図示しない改質アスファルトルーフィング下地が敷設されて止水性を確保している。また屋根材50は長軸方向が上垂木40の延設方向に沿うように敷設された竪ハゼ葺きとされ、雨水が流れ易くなっている。
(Roofing material)
As shown in FIG. 2, a roofing material 50 is placed on the upper part of the upper taruki tree 40 via a field board 52. The field board 52 is made of water-resistant plywood, and its ends are fixed to the upper taruki 40 with screws 54. The roofing material 50 is an aluminum-zinc alloy-plated steel plate, and a modified asphalt roofing base (not shown) is laid between the roofing material 50 and the field plate 52 to ensure water stopping. Further, the roofing material 50 is made of vertical goby laid so that the long axis direction is along the extending direction of the upper taruki 40, so that rainwater can easily flow.

(断熱材)
野地板52と軒天板60との間には、硬質ウレタンフォームにより形成された断熱材70が配置されている。断熱材70は図1に示すように、建物10の軒桁12よりも内側の屋内空間を覆うように配置されており、屋内空間の断熱性が高められ、屋内空間まで延設され天井仕上げ材とされた軒天板60の結露を抑制している。
(Insulation material)
A heat insulating material 70 formed of hard urethane foam is arranged between the field board 52 and the eaves top board 60. As shown in FIG. 1, the heat insulating material 70 is arranged so as to cover the indoor space inside the eaves girder 12 of the building 10, the heat insulating property of the indoor space is enhanced, and the heat insulating material 70 is extended to the indoor space and is a ceiling finishing material. Condensation on the eaves top plate 60, which is said to be, is suppressed.

なお、断熱材70は例えば図1に2点鎖線で示すように、庇の先端部分まで延設してもよい。断熱材70をこのように配置することで、屋外の軒天板60の結露が抑制される。また、断熱材70は必ずしも野地板52と軒天板60との間に設ける必要はなく、例えば図1に破線で示すように屋内空間に天井材14を張り、天井材14と軒天板60との間に小屋裏空間16を形成する場合などは、断熱材70は天井材14の上部に載置してもよい。さらに、断熱材70はグラスウールやロックウール、セルロースファイバーなどの繊維系断熱材としてもよい。 The heat insulating material 70 may be extended to the tip of the eaves, for example, as shown by the alternate long and short dash line in FIG. By arranging the heat insulating material 70 in this way, dew condensation on the outdoor eaves top plate 60 is suppressed. Further, the heat insulating material 70 does not necessarily have to be provided between the field plate 52 and the eaves top plate 60. For example, as shown by the broken line in FIG. 1, the ceiling material 14 is stretched in the indoor space, and the ceiling material 14 and the eaves top plate 60 are provided. The heat insulating material 70 may be placed on the upper part of the ceiling material 14 when the space 16 behind the cabin is formed between the two. Further, the heat insulating material 70 may be a fiber-based heat insulating material such as glass wool, rock wool or cellulose fiber.

(作用・効果)
本実施形態の屋根20の効果を説明するために、図8を用いて従来技術とされた比較例に係る屋根200について説明する。屋根200は、軒桁12に支持された垂木400と、垂木400の下に張られた軒天板600と、垂木400の上に野地板520を介して張られた屋根材500と、を備えている。垂木400は軒桁12の延設方向に沿って約900mmピッチで配置されており、庇の先端部まで延設されている。垂木400の先端400Eには鼻隠し板480が固定されている。庇240の軒桁12からの跳ね出し幅は本実施形態における庇24の跳ね出し幅L3と等しく形成されている。
(Action / effect)
In order to explain the effect of the roof 20 of the present embodiment, the roof 200 according to the comparative example according to the prior art will be described with reference to FIG. The roof 200 includes a rafter 400 supported by the eaves girder 12, an eaves top plate 600 stretched under the rafter 400, and a roofing material 500 stretched on the rafter 400 via a field board 520. ing. The rafters 400 are arranged at a pitch of about 900 mm along the extending direction of the eaves girder 12, and extend to the tip of the eaves. A nose cover plate 480 is fixed to the tip 400E of the rafter 400. The protrusion width of the eaves 240 from the eaves girder 12 is formed to be equal to the protrusion width L3 of the eaves 24 in the present embodiment.

なお、従来技術においては垂木400の下に軒天板600が張られない場合もあるが、上垂木40の下に軒天板60が張られた本実施形態と条件を等しくするために、ここでは軒天板600が張られた場合を説明する。 In the prior art, the eaves top plate 600 may not be stretched under the taruki 400, but in order to make the conditions equal to those of the present embodiment in which the eaves top plate 60 is stretched under the upper rafters 40, here. Now, the case where the eaves top plate 600 is stretched will be described.

垂木400のせいH5は、垂木400が、屋根材500及び野地板520の荷重を支持し、かつ下面に軒天板600が張られた状態で構造上及び意匠上支障となる撓みが生じない寸法とされている。垂木400に支持された庇240の跳ね出し幅L3は、本実施形態における庇24の跳ね出し幅L3と等しく、上垂木40に支持された庇先端部24Bの跳ね出し幅L1よりも大きい。このため比較例の垂木400は、本実施形態の上垂木40と比較して、より大きな曲げモーメントを負担する必要がある。したがって垂木400のせいH5は、本実施形態における上垂木40のせいH2よりも大きく形成する必要があり、庇240の見付せいH6は、本実施形態における庇先端部24Bの見付せいH4よりも大きくなる。 Due to the rafters 400, the rafters 400 support the load of the roofing material 500 and the field board 520, and the eaves top board 600 is stretched on the lower surface so that the rafters 400 do not bend in terms of structure and design. It is said that. The protrusion width L3 of the eaves 240 supported by the rafters 400 is equal to the protrusion width L3 of the eaves 24 in the present embodiment, and is larger than the protrusion width L1 of the eaves tip portion 24B supported by the upper rafters 40. Therefore, the rafter 400 of the comparative example needs to bear a larger bending moment than the upper rafter 40 of the present embodiment. Therefore, the rafter 400's cause H5 needs to be formed larger than the upper rafter 40's cause H2 in the present embodiment, and the eaves 240's finding H6 is larger than the eaves tip 24B's finding H4 in the present embodiment. Will also grow.

すなわち、本実施形態における屋根20によると、庇の跳ね出し幅が等しい比較例に係る屋根200と比較して、庇先端部24Bの見付せいH4を小さくすることができる。 That is, according to the roof 20 in the present embodiment, the mitsuke H4 of the eaves tip portion 24B can be made smaller than that of the roof 200 according to the comparative example in which the eaves have the same protrusion width.

また、仮に本実施形態における上垂木40のせいH2を、比較例における垂木400のせいH5と等しくした場合、上垂木40の強度が大きくなるので、庇先端部24Bの跳ね出し幅L1を大きくして、跳ね出し幅L3とすることができる。つまり、庇24の跳ね出し幅を大きくすることができる。 Further, if the cause H2 of the upper rafter 40 in the present embodiment is equal to the cause H5 of the taruki 400 in the comparative example, the strength of the upper rafter 40 is increased, so that the protrusion width L1 of the eaves tip portion 24B is increased. Therefore, the pop-out width L3 can be set. That is, the protrusion width of the eaves 24 can be increased.

さらに、仮に比較例における庇240において庇先端部の見付せいを小さくしようとした場合、図8に破線で示したように、垂木400を切欠き加工しなければならない。このように入隅部400Hを形成する切欠き加工は、一般に手作業で行う必要があり、施工効率が悪くなる。また、入隅部400Hが構造的な弱点となる場合もある。本実施形態における屋根20では、このような切欠き加工を必要としないので、施工が容易である。 Further, if it is attempted to reduce the finding of the eaves tip portion in the eaves 240 in the comparative example, the rafter 400 must be cut out as shown by the broken line in FIG. The notch processing for forming the inside corner portion 400H in this way generally needs to be performed manually, resulting in poor construction efficiency. Further, the inside corner portion 400H may be a structural weak point. Since the roof 20 in the present embodiment does not require such notch processing, construction is easy.

(変形例)
次に、本実施形態の変形例について説明する。本実施形態においては、上垂木40は下垂木30の上方に設けられているが、本発明の実施形態はこれに限られない。例えば、図6(A)に示す上垂木41のように、下垂木30の側方に設けてもよい。この場合、上垂木41は下垂木30のいずれか一方の側面に設けてもよいが、荷重のバランスを考慮して、下垂木30の両側に設けることが好適である。上垂木41をこのように配置することで、図6(B)に示すように、上垂木40を下垂木30の上方に配置する場合の庇根元部24Aの見付せいH3と比較して、見付せいH7を小さくすることができる。
(Modification example)
Next, a modified example of this embodiment will be described. In the present embodiment, the upper taruki 40 is provided above the lower taruki 30, but the embodiment of the present invention is not limited to this. For example, as shown in FIG. 6A, the hanging tree 41 may be provided on the side of the hanging tree 30. In this case, the upper taruki 41 may be provided on either side of the hanging tree 30, but it is preferable to provide the upper hanging tree 41 on both sides of the hanging tree 30 in consideration of the load balance. By arranging the upper taruki 41 in this way, as shown in FIG. 6 (B), as compared with the Mitsuke H3 of the eaves root portion 24A when the upper taruki 40 is arranged above the lower taruki 30 The finding H7 can be reduced.

また、上垂木40は下垂木30と同ピッチとされているが、本発明の実施形態はこれに限られない。例えば図7(A)に示す上垂木43のように、ピッチを下垂木30よりも細かくしてもよい。このようにすれば上垂木43一本あたりが負担する荷重が減るので上垂木43のせいを小さくすることができる。したがって、図7(B)に示すように、上垂木40と下垂木30とを同ピッチとした場合の庇先端部24Bの見付せいH4と比較して、見付せいH8を小さくすることができる。なお、この場合、下垂木30の上に載置されない上垂木43Bは棟木まで延設する必要はなく、受梁36を下垂木30間に適宜架け渡し、その上部に端部43BEを配置すればよい。 Further, the upper taruki 40 has the same pitch as the lower taruki 30, but the embodiment of the present invention is not limited to this. For example, as shown in FIG. 7A, the pitch may be finer than that of the hanging tree 30. By doing so, the load borne by each upper taruki 43 can be reduced, so that the cause of the upper taruki 43 can be reduced. Therefore, as shown in FIG. 7B, it is possible to make the Mitsuke H8 smaller than the Mitsuke H4 of the eaves tip 24B when the upper Taruki 40 and the lower Taruki 30 have the same pitch. it can. In this case, it is not necessary to extend the upper rafter 43B that is not placed on the lower rafter 30 to the ridge tree, and if the receiving beam 36 is appropriately bridged between the lower rafters 30 and the end portion 43BE is arranged above the receiving beam 36. Good.

10 建物
12 軒桁
20 屋根
30、31、33、35 下垂木
40、41、43 上垂木
48 鼻隠し板
50 屋根材
60 軒天板
70 断熱材
10 Buildings 12 Eaves girders 20 Roofs 30, 31, 33, 35 Taruki 40, 41, 43 Kamitaruki 48 Nose cover 50 Roofing material 60 Eaves Top plate 70 Insulation material

Claims (4)

建物の軒桁に支持され、前記軒桁より外側へ跳ね出した下垂木と、
前記下垂木の上方に設けられ、前記下垂木より外側へ跳ね出し前記下垂木よりせいが小さい上垂木と、
前記上垂木の上に設けられた屋根材と、
を有する屋根。
The hanging tree that was supported by the eaves girder of the building and jumped out from the eaves girder ,
An upper taruki that is provided above the taruki and that protrudes outward from the taruki and has a smaller sill than the taruki.
The roofing material provided on the Kamitaruki and
Roof with.
建物の軒桁に支持され、前記軒桁より外側へ跳ね出した下垂木と、
前記下垂木の側方に設けられ、前記下垂木より外側へ跳ね出し前記下垂木よりせいが小さい上垂木と、
前記上垂木の上に設けられた屋根材と、
を有する屋根。
The hanging tree that was supported by the eaves girder of the building and jumped out from the eaves girder ,
An upper taruki that is provided on the side of the taruki and that protrudes outward from the taruki and has a smaller sill than the taruki.
The roofing material provided on the Kamitaruki and
Roof with.
前記上垂木の下面には軒天板が張られ、前記上垂木の庇先端側には鼻隠し板が設けられている請求項1又は請求項2に記載の屋根。 The roof according to claim 1 or 2 , wherein an eaves top plate is stretched on the lower surface of the upper taruki and a nose cover plate is provided on the eaves tip side of the upper taruki. 前記屋根材と前記軒天板の間には断熱材が配置されている請求項3に記載の屋根。 The roof according to claim 3 , wherein a heat insulating material is arranged between the roof material and the eaves top plate.
JP2016119177A 2016-06-15 2016-06-15 roof Active JP6770343B2 (en)

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