JP4293761B2

JP4293761B2 - Square-shaped cement-based plate-shaped building material, manufacturing method of square-shaped cement-based plate-shaped building material, joined body of square-shaped cement-based plate-shaped building material

Info

Publication number: JP4293761B2
Application number: JP2002173926A
Authority: JP
Inventors: 一美早乙女
Original assignee: Asahi Kasei Construction Materials Corp
Current assignee: Asahi Kasei Construction Materials Corp
Priority date: 2002-06-14
Filing date: 2002-06-14
Publication date: 2009-07-08
Anticipated expiration: 2022-06-14
Also published as: JP2004017407A

Description

【０００１】
【発明の属する技術分野】
本発明は、方形状のセメント系板状建材で互いに接合されるアンダーラップ部とオーバーラップ部とを有して脱水プレスにより成型される方形状のセメント系板状建材、該方形状のセメント系板状建材の製造方法、目地構造を有する方形状のセメント系板状建材の接合体に関するものである。
【０００２】
【従来の技術】
従来、建物のパネルを製造するに際してセメントモルタル等を脱水成型して製造する技術が、例えば、特公平２−３８３６２号公報等により提案されている。図１４〜図２０はセメントモルタルを脱水成型して製造された従来のパネル５１の構成を示す図であって、図１４〜図１７はパネル５１相互のオーバーラップ部５３ａ，５３ｂとパネル基部５４との対向部が目地部を構成する一例であり、図１８〜図２０はパネル基部５４の表面側に化粧目地５５ａ，５５ｂを設けた一例である。
【０００３】
図１４〜図２０において、パネル５１のパネル基部５４の上端部及び右端部にアンダーラップ部５２ａ，５２ｂが突出して設けられ、該パネル基部５４の下端部及び左端部にオーバーラップ部５３ａ，５３ｂが突出して設けられている。
【０００４】
このようなパネル５１を脱水プレスにより成型する場合、図１５（ａ），（ｂ）に示すように、上金型７１、下金型７２及び外金型７３を有する脱水プレス機７０の型枠内７４にセメントモルタル等の原材料を充填し、図１５（ａ）では上金型７１及び外金型７３を下金型７２に対して図１５（ａ）の下方向に平行移動させて脱水しつつ成型する。また、図１５（ｂ）では上金型７１及び外金型７３を下金型７２に対して図１５（ｂ）の下方向に平行移動させると、先ず外金型７３が下金型７２に接触し、更に上金型７１を外金型７３に対して図１５（ｂ）の下方向に平行移動させて脱水しつつ成型する。
【０００５】
尚、図１５（ａ），（ｂ）に示す脱水プレス機７０は図１４に示すパネル５１を製作する場合の一例を示す模式図であるが、図１８に示すようなパネル５１の場合でも上金型７１或いは下金型７２の形状が異なる以外は略同様に構成される。
【０００６】
図１５（ａ），（ｂ）において、外金型７３は下金型７２或いは上金型７１に対して上下方向に平行移動する構成であるため外金型７３が型枠となるパネル５１の外周端部は該パネル５１の表面５１ａに対して垂直面（９０°）に形成される。
【０００７】
即ち、図１４及び図１６〜図２０において、アンダーラップ部５２ａ，５２ｂの側端部である上端面５２ａ１、右端面５２ｂ１及びオーバーラップ部５３ａ，５３ｂの側端部である下端面５３ａ１、左端面５３ｂ１は各パネル５１の表面５１ａに対して垂直面（９０°）に形成される。
【０００８】
一方、アンダーラップ部５２ａ，５２ｂ及びオーバーラップ部５３ａ，５３ｂから各パネル５１のパネル基部５４に至る傾斜面５４ａ，５４ｂ，５４ａ１，５４ｂ１，５４ｃ，５４ｄ及び化粧目地５５ａ，５５ｂの傾斜面５４ａ２，５４ｂ２は上金型７１及び下金型７２からの離型性を確保するために各パネル５１の表面５１ａ、或いは裏面５１ｂに対して所定の鈍角αを有して形成される。
【０００９】
そして、図１７及び図２０に示すように、各パネル５１のアンダーラップ部５２ａ，５２ｂとオーバーラップ部５３ａ，５３ｂとを夫々接合して各パネル５１が上下左右方向に配列されて外壁が構築される。
【００１０】
【発明が解決しようとする課題】
しかしながら、前述の従来例では、各パネル５１の表面５１ａ側の目地部において、図１７及び図２０に示すように、鈍角αの傾斜面５４ａ，５４ｂ及び傾斜面５４ａ１，５４ａ２，５４ｂ１，５４ｂ２と、垂直面の下端面５３ａ１及び左端面５３ｂ１とが対向するため比較的大きな隙間δ_１，δ_２が形成されるため外壁仕上げ上、美観を損ねるという問題があった。
【００１１】
本発明は前記課題を解決するものであり、その目的とするところは、脱水プレス成型により成型されるセメント系脱水プレス成型建材のアンダーラップ部とオーバーラップ部とが接合される目地部の隙間を小さく出来る方形状のセメント系板状建材、その製造方法及びその接合体を提供せんとするものである。
【００１２】
【課題を解決するための手段】
前記目的を達成するための本発明に係る方形状のセメント系板状建材は、上下何れか一方の端部に設けられるアンダーラップ部と他方の端部に設けられるオーバーラップ部を有し、更に左右の何れか一方の端部に設けられるアンダーラップ部と他方の端部に設けられるオーバーラップ部を有して脱水プレス成型により成型される方形状のセメント系板状建材であって、前記オーバーラップ部の側端部に、該オーバーラップ部に接合可能に設けられたアンダーラップ部から建材基部の表面に至る傾斜面に対応して、該傾斜面の建材基部の表面に対する傾斜角をαとしたとき、オーバーラップ部の側端部に該建材基部の表面に対して１８０°−αより小さな角度を持った傾斜面、もしくはオーバーラップ部の側端部であって該建材基部の表面側に該アンダーラップ部から該建材基部の表面に至る傾斜部の傾斜により表面に生じる長さ以上の長さを有する凸部を形成したことを特徴とする方形状のセメント系板状建材である。
【００１３】
本発明は、上述の如く構成したので、脱水プレスの離型性を確保するために形成されるアンダーラップ部から建材基部の表面に至る傾斜面に対応して、その傾斜面と同じ方向の傾斜面、或いはその傾斜面を収容するようにアンダーラップ部から建材基部の表面に至る傾斜面の表面側に突き合わせる凸部を該アンダーラップ部に接合可能に設けられたオーバーラップ部の側端部に形成したことで、脱水プレス成型により成型される方形状のセメント系板状建材のアンダーラップ部とオーバーラップ部とが接合される目地部の隙間を小さくすることが出来る。
【００１４】
また、本発明に係る方形状のセメント系板状建材の製造方法は、方形状のセメント系板状建材の製造方法において、脱水プレス成型により、上下何れか一方の端部に設けられるアンダーラップ部と他方の端部に設けられるオーバーラップ部を有し、更に左右の何れか一方の端部に設けられるアンダーラップ部と他方の端部に設けられるオーバーラップ部を有する方形状のセメント系板状体を成型し、養生後、その板状体の前記オーバーラップ部の側端部を切削し、板状体基部の表面に至る傾斜面に対応して、該傾斜面の建材基部の表面に対する傾斜角をαとしたとき、オーバーラップ部の側端部に該建材基部の表面に対して１８０°−αより小さな角度を持った傾斜面、もしくはオーバーラップ部の側端部であって該建材基部の表面側に該アンダーラップ部から該建材基部の表面に至る傾斜面の傾斜により表面に生じる長さ以上の長さを有する凸部を形成して方形状のセメント系板状建材とすることを特徴とする。
【００１５】
また、本発明に係る目地構造を有する方形状のセメント系板状建材の接合体は、上述の方形状のセメント系板状建材のアンダーラップ部と、該アンダーラップ部に接合可能な別の請求項１に記載の方形状のセメント系板状建材のオーバーラップ部とを重ねて接合される目地構造を有する方形状のセメント系板状建材の接合体であって、前記オーバーラップ部の側端部に形成された傾斜面または凸部を該オーバーラップ部に接合可能なアンダーラップ部から建材基部の表面に至る傾斜面の表面側に突き合わせて接合される目地構造を有する方形状のセメント系板状建材の接合体である。
【００１６】
上記目地構造によれば、脱水プレス成型により成型される方形状のセメント系板状建材のアンダーラップ部とオーバーラップ部とが接合される目地部の隙間を小さくすることが出来るので目地構造の美観が損なわれることなく目地部からの雨水の侵入等も防ぐことが出来る。
【００１７】
【発明の実施の形態】
図により本発明に係る脱水プレス成型建材及びその製造方法及び目地構造の一例として建物の外壁を構成する外壁パネルに適用した場合の一実施形態を具体的に説明する。図１は本発明に係る脱水プレス成型建材の第１実施形態の構成を示す斜視図、図２（ａ）は図１のＸ−Ｘ断面図、図２（ｂ）は図１のＹ−Ｙ断面図、図３はオーバーラップ部の側端面に設けられた傾斜面の構成を示す図、図４はアンダーラップ部とオーバーラップ部とを接合した際の目地部の構成を示す図である。
【００１８】
先ず、図１〜図４を用いて本発明に係る脱水プレス成型建材及びその製造方法及び目地構造の第１実施形態の構成について説明する。図１〜図４において、１は少なくとも上下方向の何れか一方の端部に設けられるアンダーラップ部と、該アンダーラップ部に接合可能で少なくとも上下左右の何れか一方の端部に設けられるオーバーラップ部とを有して脱水プレス成型により成型される方形状のセメント系板状建材となるパネルである。
【００１９】
脱水プレス成型建材となるパネル１は、図１５に示して前述した脱水プレス機７０によりセメントモルタルを脱水成型して製造されたパネルであり、建材基部となるパネル基部４の上端部及び右端部にアンダーラップ部２ａ，２ｂが突出して設けられ、該パネル基部４の下端部及び左端部にオーバーラップ部３ａ，３ｂが突出して設けられている。
【００２０】
オーバーラップ部３ａ，３ｂの側端部となる下端面３ａ１及び左端面３ｂ１は、該オーバーラップ部３ａ，３ｂに接合可能に設けられたアンダーラップ部２ａ，２ｂからパネル基部４の表面（即ち、パネル１の表面）１ａに至る傾斜面４ａ，４ｂに対応して該傾斜面４ａ，４ｂと同じ方向に傾斜した所定の鋭角βを有する傾斜面で構成されている。
【００２１】
即ち、このようなセメント系脱水プレス成型建材となるパネル１を脱水プレスにより成型する場合、図１５（ａ），（ｂ）に示して前述したように、上金型７１、下金型７２及び外金型７３を有する脱水プレス機７０の型枠内７４にセメントモルタル等の原材料を充填し、例えば、図１５（ａ）に示す脱水プレス機７０では上金型７１及び外金型７３を下金型７２に対して図１５（ａ）の下方向に平行移動させて脱水しつつ成型する。また、図１５（ｂ）に示す脱水プレス機７０では上金型７１及び外金型７３を下金型７２に対して図１５（ｂ）の下方向に平行移動させると、先ず外金型７３が下金型７２に接触し、更に上金型７１を外金型７３に対して図１５（ｂ）の下方向に平行移動させて脱水しつつ成型する。
【００２２】
図１５（ａ），（ｂ）において、外金型７３は下金型７２或いは上金型７１に対して上下方向に平行移動する構成であるため外金型７３が型枠となるパネル１の外周端部は該パネル１の表面１ａに対して垂直面（９０°）に形成される。
【００２３】
即ち、脱水プレス成型により成型された当初のパネル１のアンダーラップ部２ａ，２ｂの側端部である上端面２ａ１、右端面２ｂ１及びオーバーラップ部３ａ，３ｂの側端部である下端面３ａ１′、左端面３ｂ１′はパネル１の表面１ａに対して垂直面（９０°）に形成される。
【００２４】
一方、アンダーラップ部２ａ，２ｂ及びオーバーラップ部３ａ，３ｂからパネル１のパネル基部４に至る傾斜面４ａ，４ｂ，４ｃ，４ｄは上金型７１及び下金型７２からの離型性を確保するためにパネル１の表面１ａ、或いは裏面１ｂに対して所定の鈍角αを有して形成される。
【００２５】
そして、上記アンダーラップ部２ａ，２ｂとオーバーラップ部３ａ，３ｂとを有する方形状のセメント系板状体を脱水プレス成型した後、乾燥させて養生し、その後、その板状体のオーバーラップ部３ａ，３ｂの側端部となる成型当初の垂直面からなる下端面３ａ１′及び左端面３ｂ１′を切削して所定の鋭角βを有する傾斜面で構成される下端面３ａ１及び左端面３ｂ１を形成する。
【００２６】
そして、図４に示すように、一方のパネル１のオーバーラップ部３ａ，３ｂの側端部となる所定の鋭角βを有する傾斜面で構成される下端面３ａ１及び左端面３ｂ１を、他方のパネル１のアンダーラップ部２ａ，２ｂからパネル基部４の表面１ａに至る上辺及び右辺の傾斜面４ａ，４ｂに対向させて、各パネル１のアンダーラップ部２ａ，２ｂとオーバーラップ部３ａ，３ｂとを夫々接合して複数のパネル１が上下左右方向に配列されて外壁が構築される。
【００２７】
本実施形態では、オーバーラップ部３ａ，３ｂの側端部となる下端面３ａ１及び左端面３ｂ１の傾斜面の鋭角βは、１８０°から、アンダーラップ部２ａ，２ｂからパネル基部４の表面１ａに至る上辺及び右辺の傾斜面４ａ，４ｂの鈍角αを差し引いた角度よりも小さくなるように構成されている。即ち、｛β＜（１８０°−α）｝となるように設定されている。
【００２８】
これにより、図４に示すように、オーバーラップ部３ａ，３ｂの側端部となる下端面３ａ１及び左端面３ｂ１の傾斜面のパネル１の表面１ａ側の先端部を、アンダーラップ部２ａ，２ｂからパネル基部４の表面１ａに至る上辺及び右辺の傾斜面４ａ，４ｂのパネル１の表面１ａ側の先端部に付き当てることにより目地部の隙間が略無くなる目地構造とすることが出来る。
【００２９】
従って、乾式工法により複数のパネル１のアンダーラップ部２ａ，２ｂとオーバーラップ部３ａ，３ｂとを接合して上下左右に配置して構築された外壁の目地構造の美観が損なわれることなく、目地部からの雨水の侵入等も防ぐことが出来る。
【００３０】
次に図５〜図８を用いて本発明に係る脱水プレス成型建材及びその製造方法及び目地構造の第２実施形態の構成について説明する。図５は本発明に係る脱水プレス成型建材の第２実施形態の構成を示す斜視図、図６（ａ）は図５のＸ−Ｘ断面図、図６（ｂ）は図５のＹ−Ｙ断面図、図７はオーバーラップ部の側端面に設けられた傾斜面の構成を示す図、図８はアンダーラップ部とオーバーラップ部とを接合した際の目地部の構成を示す図である。尚、前記第１実施形態と同様に構成したものは同一の符号を付して説明を省略する。
【００３１】
本実施形態では、図５〜図８に示すように、アンダーラップ部２ａ，２ｂからパネル基部４の表面１ａに至る傾斜面４ａ，４ｂの表面１ａ側角部に幅ｗ_１、深さｈの化粧目地１１ａ，１１ｂが設けられたものである。化粧目地１１ａ，１１ｂに隣接する傾斜面１１ａ１，１１ｂ１も離型性を確保するためにパネル１の表面１ａに対して鈍角αで形成される。
【００３２】
一方、アンダーラップ部２ａ，２ｂとオーバーラップ部３ａ，３ｂとを有する方形状のセメント系板状体を脱水プレス成型した後、乾燥させて養生し、その後、その板状体のオーバーラップ部３ａ，３ｂの側端部となる成型当初の垂直面からなる下端面３ａ１′及び左端面３ｂ１′を表面１ａから距離ｈだけ垂直面３ａ２，３ｂ２を残し、該距離ｈよりもパネル１の裏面１ｂ側を切削して所定の鋭角βを有する傾斜面で構成される下端面３ａ１及び左端面３ｂ１を形成する。
【００３３】
そして、図８に示すように、一方のパネル１のオーバーラップ部３ａ，３ｂの側端部となる垂直面３ａ２，３ｂ２と、これに接続される所定の鋭角βを有する傾斜面とで構成される下端面３ａ１及び左端面３ｂ１を、他方のパネル１のアンダーラップ部２ａ，２ｂからパネル基部４の表面１ａに至る上辺及び右辺の傾斜面４ａ，４ｂに対向させて、各パネル１のアンダーラップ部２ａ，２ｂとオーバーラップ部３ａ，３ｂとを夫々接合して複数のパネル１が上下左右方向に配列されて外壁が構築される。
【００３４】
これにより、図８に示すように、オーバーラップ部３ａ，３ｂの側端部となる下端面３ａ１及び左端面３ｂ１の傾斜面のパネル１の表面１ａ側の先端部を、アンダーラップ部２ａ，２ｂからパネル基部４の表面１ａに至る上辺及び右辺の傾斜面４ａ，４ｂのパネル１の表面１ａ側の先端部に付き当てることにより幅ｗ_１の化粧目地１１ａ，１１ｂを設けた目地構造とすることが出来る。
【００３５】
従って、乾式工法により複数のパネル１のアンダーラップ部２ａ，２ｂとオーバーラップ部３ａ，３ｂとを接合して上下左右に配置して構築された外壁の目地構造は化粧目地１１ａ，１１ｂの幅ｗ_１が均一に形成出来、美観が損なわれることなく、目地部からの雨水の侵入等も防ぐことが出来る。
【００３６】
本実施形態の場合、図４に示して前述した第１実施形態のオーバーラップ部３ａ，３ｂの下端面３ａ１及び左端面３ｂ１の鋭角βの先端部と比較して、距離ｈ分だけ垂直面３ａ２，３ｂ２で構成される肉厚部が設けられるため成型当初の下端面３ａ１′及び成型当初の左端面３ｂ１′を切削加工する際やパネル１の施工時等に鋭角βの先端部が欠ける虞が無く好ましい。他の構成は前記第１実施形態と同様に構成され、同様の効果を得ることが出来る。
【００３７】
次に図９〜図１３を用いて本発明に係る脱水プレス成型建材及びその製造方法及び目地構造の第３実施形態の構成について説明する。図９は本発明に係る脱水プレス成型建材の第３実施形態の構成を示す斜視図、図１０（ａ）は図９のＸ−Ｘ断面図、図１０（ｂ）は図９のＹ−Ｙ断面図、図１１はオーバーラップ部の側端面に設けられた凸部の構成を示す図、図１２はアンダーラップ部とオーバーラップ部とを接合した際の目地部の構成を示す図、図１３は凸部の幅を大きくした場合の他の目地部の構成を示す図である。尚、前記各実施形態と同様に構成したものは同一の符号を付して説明を省略する。
【００３８】
本実施形態では、図９〜図１３に示すように、パネル１のオーバーラップ部３ａ，３ｂの側端部となる下端面３ａ１及び左端面３ｂ１に、該オーバーラップ部３ａ，３ｂに接合可能に設けられたアンダーラップ部２ａ，２ｂからパネル基部４の表面１ａに至る傾斜面４ａ，４ｂに対応して該傾斜面４ａ，４ｂを収容するような凹部が形成されており、該凹部のパネル１の表面１ａ側には距離ｈ及び所定の幅を有する凸部３ａ３，３ｂ３が形成されている。
【００３９】
図１２に示す凸部３ａ３，３ｂ３の幅ｔ_１はアンダーラップ部２ａ，２ｂからパネル基部４の表面１ａに至る傾斜面４ａ，４ｂの図１２（ｂ）では高さ分寸法、或いは図１２（ａ）では幅分寸法に応じた幅で構成されており、該凸部３ａ３，３ｂ３をアンダーラップ部２ａ，２ｂからパネル基部４の表面に至る傾斜面４ａ，４ｂの表面側に突き合わせることで、下端面３ａ１及び左端面３ｂ１の凹部が傾斜面４ａ，４ｂを収容して化粧目地１１ａ，１１ｂの幅ｗ_１が設定される。
【００４０】
一方、図１３に示す凸部３ａ３，３ｂ３の幅ｔ_２はアンダーラップ部２ａ，２ｂからパネル基部４の表面１ａに至る傾斜面４ａ，４ｂの図１３（ｂ）では高さ分寸法、或いは図１３（ａ）では幅分寸法に応じた幅寸法に加えて所定の幅だけ大きな幅で構成されており、該凸部３ａ３，３ｂ３をアンダーラップ部２ａ，２ｂからパネル基部４の表面に至る傾斜面４ａ，４ｂの表面側に突き合わせることで、下端面３ａ１及び左端面３ｂ１の凹部が傾斜面４ａ，４ｂを含む化粧目地１１ａ，１１ｂの一部を収容してより小さな化粧目地１１ａ，１１ｂの幅ｗ_２が設定される。
【００４１】
下端面３ａ１及び左端面３ｂ１の凹部は、成型当初の下端面３ａ１′及び成型当初の左端面３ｂ１′を凸部３ａ３，３ｂ３を残して切削加工される。他の構成は前記各実施形態と同様に構成され、同様の効果を得ることが出来る。
【００４２】
【発明の効果】
本発明は、上述の如き構成と作用とを有するので、脱水プレスの離型性を確保するために形成されるアンダーラップ部から建材基部の表面に至る傾斜面に対応して、その傾斜面と同じ方向の傾斜面、或いはその傾斜面を収容するようにアンダーラップ部から建材基部の表面に至る傾斜面の表面側に突き合わせる凸部を該アンダーラップ部に接合可能に設けられたオーバーラップ部の側端部に形成したことで、脱水プレス成型により成型される方形状のセメント系板状建材のアンダーラップ部とオーバーラップ部とが接合される目地部の隙間を小さくすることが出来る。
【００４３】
また、本発明に係る目地構造を有する方形状のセメント系板状建材の接合体によれば、脱水プレス成型により成型される方形状のセメント系板状建材のアンダーラップ部とオーバーラップ部とが接合される目地部の隙間を小さくすることが出来るので目地構造の美観が損なわれることなく目地部からの雨水の侵入等も防ぐことが出来る。
【図面の簡単な説明】
【図１】本発明に係る脱水プレス成型建材の第１実施形態の構成を示す斜視図である。
【図２】（ａ）は図１のＸ−Ｘ断面図、（ｂ）は図１のＹ−Ｙ断面図である。
【図３】オーバーラップ部の側端面に設けられた傾斜面の構成を示す図である。
【図４】アンダーラップ部とオーバーラップ部とを接合した際の目地部の構成を示す図である。
【図５】本発明に係る脱水プレス成型建材の第２実施形態の構成を示す斜視図である。
【図６】（ａ）は図５のＸ−Ｘ断面図、（ｂ）は図５のＹ−Ｙ断面図である。
【図７】オーバーラップ部の側端面に設けられた傾斜面の構成を示す図である。
【図８】アンダーラップ部とオーバーラップ部とを接合した際の目地部の構成を示す図である。
【図９】本発明に係る脱水プレス成型建材の第３実施形態の構成を示す斜視図である。
【図１０】（ａ）は図９のＸ−Ｘ断面図、（ｂ）は図９のＹ−Ｙ断面図である。
【図１１】オーバーラップ部の側端面に設けられた凸部の構成を示す図である。
【図１２】アンダーラップ部とオーバーラップ部とを接合した際の目地部の構成を示す図である。
【図１３】凸部の幅を大きくした場合の他の目地部の構成を示す図である。
【図１４】従来のパネルの構成を説明する斜視図である。
【図１５】脱水プレス機の構成を示す模式説明図である。
【図１６】（ａ）は図１４のＸ−Ｘ断面図、（ｂ）は図１４のＹ−Ｙ断面図である。
【図１７】従来例の課題を説明する図である。
【図１８】従来の化粧目地を形成したパネルの構成を説明する斜視図である。
【図１９】（ａ）は図１８のＸ−Ｘ断面図、（ｂ）は図１８のＹ−Ｙ断面図である。
【図２０】従来例の課題を説明する図である。
【符号の説明】
１…パネル
１ａ…表面
１ｂ…裏面
２ａ，２ｂ…アンダーラップ部
３ａ，３ｂ…オーバーラップ部
３ａ１…下端面
３ａ１′…成型当初の下端面
３ｂ１…左端面
３ｂ１′…成型当初の左端面
３ａ２，３ｂ２…垂直面
３ａ３，３ｂ３…凸部
４…パネル基部
４ａ〜４ｄ…傾斜面
１１ａ，１１ｂ…化粧目地
１１ａ１，１１ｂ１…傾斜面
７０…脱水プレス機
７１…上金型
７２…下金型
７３…外金型
７４…型枠内[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rectangular cement-based plate-shaped building material that has an underlap portion and an overlap portion that are joined to each other by a square-shaped cement-based plate-shaped building material, and is molded by a dehydration press, and the rectangular cement-based building material The present invention relates to a method for producing a plate-shaped building material, and a joined body of rectangular cement-based plate-shaped building materials having a joint structure.
[0002]
[Prior art]
Conventionally, a technique for producing cement mortar by dehydration molding when manufacturing a panel of a building has been proposed in, for example, Japanese Patent Publication No. 2-38362. FIGS. 14 to 20 are views showing the configuration of a conventional panel 51 manufactured by dehydrating and molding cement mortar. FIGS. 14 to 17 show the overlapping portions 53a and 53b and the panel base 54 between the panels 51. 18 to 20 is an example in which makeup joints 55 a and 55 b are provided on the surface side of the panel base 54.
[0003]
In FIG. 14 to FIG. 20, underlap portions 52 a and 52 b protrude from the upper end portion and the right end portion of the panel base portion 54 of the panel 51, and overlap portions 53 a and 53 b are provided at the lower end portion and the left end portion of the panel base portion 54. Protrusively provided.
[0004]
When such a panel 51 is molded by a dehydrating press, as shown in FIGS. 15A and 15B, a form of a dehydrating press 70 having an upper mold 71, a lower mold 72, and an outer mold 73. The inner material 74 is filled with raw materials such as cement mortar, and in FIG. 15A, the upper die 71 and the outer die 73 are moved parallel to the lower die 72 in the downward direction in FIG. While molding. 15B, when the upper mold 71 and the outer mold 73 are translated in the lower direction of FIG. 15B with respect to the lower mold 72, the outer mold 73 is first changed to the lower mold 72. Further, the upper die 71 is further moved in parallel with the outer die 73 in the downward direction in FIG.
[0005]
The dehydrating press 70 shown in FIGS. 15A and 15B is a schematic view showing an example of the case where the panel 51 shown in FIG. 14 is manufactured. However, even in the case of the panel 51 shown in FIG. The structure is substantially the same except that the mold 71 or the lower mold 72 has a different shape.
[0006]
15 (a) and 15 (b), the outer mold 73 is configured to translate in the vertical direction with respect to the lower mold 72 or the upper mold 71. The outer peripheral end is formed in a vertical plane (90 °) with respect to the surface 51 a of the panel 51.
[0007]
That is, in FIGS. 14 and 16 to 20, the upper end surface 52 a 1 that is the side end portion of the underlap portions 52 a and 52 b, the right end surface 52 b 1, the lower end surface 53 a 1 that is the side end portion of the overlap portions 53 a and 53 b, and the left end surface 53b1 is formed in a vertical plane (90 °) with respect to the surface 51a of each panel 51.
[0008]
On the other hand, the inclined surfaces 54a, 54b, 54a1, 54b1, 54c, 54d and the inclined surfaces 54a2, 54b2 of the decorative joints 55a, 55b extending from the underlap portions 52a, 52b and the overlap portions 53a, 53b to the panel base 54 of each panel 51. Is formed with a predetermined obtuse angle α with respect to the front surface 51a or the back surface 51b of each panel 51 in order to ensure releasability from the upper mold 71 and the lower mold 72.
[0009]
As shown in FIGS. 17 and 20, the underlap portions 52a and 52b and the overlap portions 53a and 53b of each panel 51 are joined to each other, and the panels 51 are arranged in the vertical and horizontal directions to construct the outer wall. The
[0010]
[Problems to be solved by the invention]
However, in the above-described conventional example, in the joint portion on the surface 51a side of each panel 51, as shown in FIGS. 17 and 20, the inclined surfaces 54a, 54b and the inclined surfaces 54a1, 54a2, 54b1, 54b2 with obtuse angles α, Since the lower end surface 53a1 and the left end surface 53b1 of the vertical surface are opposed to each other, relatively large gaps δ ₁ and δ ₂ are formed.
[0011]
The present invention solves the above-mentioned problems, and the object of the present invention is to provide a gap between the joint portions where the underlap portion and the overlap portion of the cement-based dewatering press-molded building material molded by dewatering press molding are joined. It is intended to provide a rectangular cement-based plate-shaped building material that can be made small, a manufacturing method thereof, and a joined body thereof.
[0012]
[Means for Solving the Problems]
The cement-based plate-shaped building materials rectangular shape according to the present invention for achieving the object has an overlap portion provided in underlap portion provided on one end top and bottom and the other end portion, Furthermore, a rectangular cement-based plate-shaped building material molded by dehydration press molding having an underlap portion provided at one of the left and right end portions and an overlap portion provided at the other end portion, The inclination angle of the inclined surface with respect to the surface of the building material base is set to α corresponding to the inclined surface extending from the underlap portion provided to be able to be joined to the overlap portion to the surface of the building material base at the side end portion of the overlap portion. and when the inclined surface having an angle smaller than 180 °-.alpha. to the surface of the該建material base on a side end portion of the overlap portion, Moshiku's該建material base a side edge portion of the O Barappu portion the on the surface side Is a cement-based plate-shaped building materials rectangular shape, characterized in that the formation of the convex portion having a length longer than that generated on the surface by the inclination of the inclined portion leading to the surface of the該建material base from Ndarappu unit.
[0013]
Since the present invention is configured as described above, an inclination in the same direction as the inclined surface corresponding to the inclined surface from the underlap portion formed to ensure the releasability of the dehydrating press to the surface of the building material base. The side edge of the overlap part provided so as to be able to be joined to the surface of the inclined surface from the underlap part to the surface of the building material base so as to accommodate the surface or the inclined surface. By forming in this way, it is possible to reduce the gap between the joint portions where the underlap portion and the overlap portion of the rectangular cementitious plate-shaped building material molded by dehydration press molding are joined.
[0014]
Further, the method for producing a rectangular cementitious plate-shaped building material according to the present invention is a method for producing a square-shaped cementitious plate-shaped building material, wherein the underlap portion is provided at one of the upper and lower ends by dehydration press molding. And a rectangular cementitious plate having an overlap portion provided at the other end, an underlap portion provided at one of the left and right ends, and an overlap portion provided at the other end. After the body is molded and cured, the side end of the overlap portion of the plate-like body is cut , and the inclined surface is inclined with respect to the surface of the building material base corresponding to the inclined surface reaching the surface of the plate-like body base when the corner was alpha, inclined surfaces having an angle smaller than 180 °-.alpha. to the surface of the該建material base on a side end portion of the overlap portion, Moshiku is a side edge portion of the O Barappu section the the Ann surface side of the building material base Characterized by a Rappu portion該建member proximal inclined surfaces cementitious plate building material of rectangular shape to form a convex portion having a length longer than that generated on the surface by the inclination of the leading to the surface of the.
[0015]
Moreover, the rectangular cement-type plate-like building material joined body having the joint structure according to the present invention is an underlap portion of the above-mentioned square-shaped cement-type plate-like building material, and another claim that can be joined to the underlap portion. Item 2. A joined body of rectangular cementitious plate-shaped building materials having a joint structure that is overlapped and joined to the overlapped portion of the square-shaped cementitious plate-shaped building material according to Item 1, wherein the side ends of the overlapped portions Rectangular cement-based board having a joint structure that is joined to the surface side of the inclined surface extending from the underlap portion that can be joined to the overlap portion to the surface of the building material base, with the inclined surface or the convex portion formed in the portion being joined It is a joined body of building materials.
[0016]
According to the joint structure described above, the gap between the joint portions where the underlap portion and the overlap portion of the rectangular cementitious plate-shaped building material molded by dehydration press molding can be reduced, so that the appearance of the joint structure is beautiful. Invasion of rainwater from the joint can be prevented without damage.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment when applied to an outer wall panel constituting an outer wall of a building as an example of a dewatering press-molded building material, a manufacturing method thereof, and a joint structure according to the present invention will be specifically described with reference to the drawings. 1 is a perspective view showing a configuration of a first embodiment of a dewatering press-molded building material according to the present invention, FIG. 2A is a sectional view taken along line XX in FIG. 1, and FIG. 2B is YY in FIG. FIG. 3 is a cross-sectional view, FIG. 3 is a diagram showing a configuration of an inclined surface provided on a side end surface of the overlap portion, and FIG. 4 is a diagram showing a configuration of a joint portion when the underlap portion and the overlap portion are joined.
[0018]
First, the structure of 1st Embodiment of the dehydration press molding building material which concerns on this invention, its manufacturing method, and a joint structure is demonstrated using FIGS. 1-4. 1 to 4, reference numeral 1 denotes an underlap portion provided at at least one end portion in the vertical direction, and an overlap portion that can be joined to the underlap portion and provided at at least one of the upper, lower, left and right ends. The panel is a square-shaped cement-based plate-shaped building material formed by dehydration press molding.
[0019]
The panel 1 which becomes a dehydrating press-molded building material is a panel manufactured by dehydrating and molding cement mortar with the dehydrating press machine 70 shown in FIG. 15 and described above. At the upper end and right end of the panel base 4 serving as a building material base Underlap portions 2a and 2b are provided to protrude, and overlap portions 3a and 3b are provided to protrude from the lower end portion and the left end portion of the panel base portion 4.
[0020]
The lower end surface 3a1 and the left end surface 3b1 which are the side end portions of the overlap portions 3a and 3b are connected to the overlap portions 3a and 3b from the underlap portions 2a and 2b so as to be joined to the surface of the panel base 4 (that is, Corresponding to the inclined surfaces 4a and 4b reaching the surface 1a) of the panel 1, it is constituted by an inclined surface having a predetermined acute angle β inclined in the same direction as the inclined surfaces 4a and 4b.
[0021]
That is, when the panel 1 which is such a cement-based dewatering press molding building material is molded by the dewatering press, as shown in FIGS. 15 (a) and 15 (b), the upper mold 71, the lower mold 72 and A raw material such as cement mortar is filled in a mold 74 of a dehydrating press machine 70 having an outer mold 73. For example, in the dehydrating press machine 70 shown in FIG. 15 (a), the upper mold 71 and the outer mold 73 are moved downward. The mold 72 is moved in the downward direction in FIG. 15B, when the upper mold 71 and the outer mold 73 are translated in the lower direction of FIG. 15B with respect to the lower mold 72, first the outer mold 73 is obtained. Is in contact with the lower mold 72, and the upper mold 71 is further moved in parallel with the outer mold 73 in the downward direction of FIG.
[0022]
15A and 15B, since the outer mold 73 is configured to move in the vertical direction with respect to the lower mold 72 or the upper mold 71, the outer mold 73 serves as a frame of the panel 1. The outer peripheral end is formed in a vertical plane (90 °) with respect to the surface 1 a of the panel 1.
[0023]
That is, the upper end surface 2a1, which is the side end portion of the underlap portions 2a, 2b of the original panel 1 formed by dehydration press molding, the lower end surface 3a1 'which is the side end portion of the right end surface 2b1, and the overlap portions 3a, 3b. The left end face 3b1 ′ is formed in a vertical plane (90 °) with respect to the surface 1a of the panel 1.
[0024]
On the other hand, the inclined surfaces 4a, 4b, 4c, 4d from the underlap portions 2a, 2b and the overlap portions 3a, 3b to the panel base 4 of the panel 1 ensure releasability from the upper mold 71 and the lower mold 72. For this purpose, the panel 1 is formed with a predetermined obtuse angle α with respect to the front surface 1a or the back surface 1b.
[0025]
And after carrying out dehydration press molding of the square-shaped cement-type plate-like body which has the said underlap parts 2a and 2b and the overlap parts 3a and 3b, it dries and hardens | cures, Then, the overlap part of the plate-like body The lower end surface 3a1 'and the left end surface 3b1', which are the vertical surfaces at the beginning of molding, which are the side end portions of 3a and 3b, are cut to form the lower end surface 3a1 and the left end surface 3b1 configured by inclined surfaces having a predetermined acute angle β. To do.
[0026]
Then, as shown in FIG. 4, the lower end surface 3a1 and the left end surface 3b1 formed by inclined surfaces having a predetermined acute angle β, which are side end portions of the overlap portions 3a and 3b of one panel 1, are connected to the other panel. The underlap portions 2a and 2b and the overlap portions 3a and 3b of each panel 1 are opposed to the inclined surfaces 4a and 4b on the upper side and the right side from the first underlap portion 2a and 2b to the surface 1a of the panel base portion 4. The plurality of panels 1 are joined to each other and arranged in the vertical and horizontal directions to construct the outer wall.
[0027]
In the present embodiment, the acute angle β of the inclined surfaces of the lower end surface 3a1 and the left end surface 3b1 which are the side ends of the overlap portions 3a and 3b is from 180 ° to the surface 1a of the panel base portion 4 from the underlap portions 2a and 2b. It is configured to be smaller than an angle obtained by subtracting the obtuse angle α of the inclined surfaces 4a and 4b on the upper and right sides. That is, it is set to be {β <(180 ° −α)}.
[0028]
As a result, as shown in FIG. 4, the front end portion on the surface 1a side of the panel 1 of the inclined surface of the lower end surface 3a1 and the left end surface 3b1 serving as the side end portions of the overlap portions 3a, 3b is changed to the underlap portions 2a, 2b. A joint structure in which the gaps of the joint portions are substantially eliminated can be obtained by applying the inclined surfaces 4a, 4b on the upper side and the right side of the panel base portion 4 to the front end portion of the panel 1 on the surface 1a side.
[0029]
Accordingly, the joints of the outer wall constructed by joining the underlap portions 2a, 2b and the overlap portions 3a, 3b of the plurality of panels 1 by the dry construction method and arranging them vertically and horizontally are not impaired. Intrusion of rainwater from the section can also be prevented.
[0030]
Next, the structure of 2nd Embodiment of the dehydration press molding building material which concerns on this invention, its manufacturing method, and a joint structure is demonstrated using FIGS. 5 is a perspective view showing a configuration of a second embodiment of the dewatering press-molded building material according to the present invention, FIG. 6A is a sectional view taken along line XX in FIG. 5, and FIG. 6B is YY in FIG. FIG. 7 is a cross-sectional view, FIG. 7 is a diagram showing a configuration of an inclined surface provided on a side end surface of the overlap portion, and FIG. 8 is a diagram showing a configuration of a joint portion when the underlap portion and the overlap portion are joined. In addition, what was comprised similarly to the said 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.
[0031]
In this embodiment, as shown in FIGS. 5 to 8, a width w ₁ and a depth h are formed at corners on the surface 1 a side of the inclined surfaces 4 a and 4 b extending from the underlap portions 2 a and 2 b to the surface 1 a of the panel base 4. Cosmetic joints 11a and 11b are provided. The inclined surfaces 11a1 and 11b1 adjacent to the decorative joints 11a and 11b are also formed at an obtuse angle α with respect to the surface 1a of the panel 1 in order to ensure releasability.
[0032]
On the other hand, a rectangular cementitious plate having underlap portions 2a and 2b and overlap portions 3a and 3b is subjected to dehydration press molding, dried and cured, and then the overlap portion 3a of the plate. , 3b, the lower end surface 3a1 ′ and the left end surface 3b1 ′, which are vertical surfaces at the beginning of molding, leave the vertical surfaces 3a2 and 3b2 by a distance h from the surface 1a, and the back surface 1b side of the panel 1 from the distance h. Are cut to form a lower end surface 3a1 and a left end surface 3b1 formed of inclined surfaces having a predetermined acute angle β.
[0033]
And as shown in FIG. 8, it is comprised by the vertical surfaces 3a2 and 3b2 used as the side edge part of the overlap parts 3a and 3b of one panel 1, and the inclined surface which has the predetermined acute angle (beta) connected to this. The lower end surface 3a1 and the left end surface 3b1 are opposed to the inclined surfaces 4a, 4b on the upper side and the right side from the underlap portions 2a, 2b of the other panel 1 to the surface 1a of the panel base 4, and the underlap of each panel 1 A plurality of panels 1 are arranged in the vertical and horizontal directions by joining the portions 2a and 2b and the overlap portions 3a and 3b, respectively, and an outer wall is constructed.
[0034]
As a result, as shown in FIG. 8, the front end portion on the surface 1a side of the panel 1 of the inclined surface of the lower end surface 3a1 and the left end surface 3b1 serving as the side end portions of the overlap portions 3a, 3b is changed to the underlap portions 2a, 2b. be from the upper side and the right side of the inclined surfaces 4a extending to the surface 1a of the panel base 4, the decorative joint 11a having a width w ₁ by directing attached to the distal end portion of the front surface 1a side of the 4b panel 1, a joint structure in which a 11b I can do it.
[0035]
Therefore, the joint structure of the outer wall constructed by joining the underlap portions 2a, 2b and the overlap portions 3a, 3b of the plurality of panels 1 by the dry method and arranging them vertically and horizontally is the width w of the decorative joints 11a, 11b. ₁ can be formed uniformly, and the appearance of rainwater from the joint can be prevented without impairing the aesthetic appearance.
[0036]
In the case of the present embodiment, the vertical surface 3a2 by the distance h is compared with the tip portions of the acute angle β of the lower end surface 3a1 and the left end surface 3b1 of the overlap portions 3a, 3b of the first embodiment described above with reference to FIG. , 3b2 is provided, and there is a possibility that the tip of the acute angle β may be lost when cutting the lower end surface 3a1 ′ at the beginning of molding and the left end surface 3b1 ′ at the beginning of molding or when the panel 1 is constructed. Not preferred. Other configurations are the same as those in the first embodiment, and the same effects can be obtained.
[0037]
Next, the structure of 3rd Embodiment of the dehydration press molding building material which concerns on this invention, its manufacturing method, and a joint structure is demonstrated using FIGS. 9-13. 9 is a perspective view showing the configuration of the third embodiment of the dewatering press-molded building material according to the present invention, FIG. 10A is a sectional view taken along line XX in FIG. 9, and FIG. 10B is YY in FIG. FIG. 11 is a cross-sectional view, FIG. 11 is a diagram showing a configuration of a convex portion provided on the side end surface of the overlap portion, FIG. 12 is a diagram showing a configuration of a joint portion when the underlap portion and the overlap portion are joined, FIG. These are figures which show the structure of the other joint part at the time of enlarging the width | variety of a convex part. In addition, what was comprised similarly to each said embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.
[0038]
In the present embodiment, as shown in FIGS. 9 to 13, the lower end surface 3 a 1 and the left end surface 3 b 1 which are side end portions of the overlap portions 3 a and 3 b of the panel 1 can be joined to the overlap portions 3 a and 3 b. Corresponding to the inclined surfaces 4a, 4b from the provided underlap portions 2a, 2b to the surface 1a of the panel base 4, recesses are formed so as to accommodate the inclined surfaces 4a, 4b. On the surface 1a side, convex portions 3a3 and 3b3 having a distance h and a predetermined width are formed.
[0039]
Width _{t 1} is underlap portion 2a, the inclined surfaces 4a extending from 2b on the surface 1a of the panel base 4, and FIG. 12 (b) the height of the size of 4b of the projections 3a3,3b3 shown in FIG. 12, or FIG. 12 ( In a), it is configured with a width corresponding to the size of the width, and the convex portions 3a3 and 3b3 are abutted against the surface side of the inclined surfaces 4a and 4b extending from the underlap portions 2a and 2b to the surface of the panel base portion 4. , the recess of the lower end surface 3a1 and the left end face 3b1 inclined surfaces 4a, accommodates 4b with decorative joint 11a, the width _{w 1} of 11b is set.
[0040]
On the other hand, the width _{t 2} is underlap portion 2a, the inclined surfaces 4a extending from 2b on the surface 1a of the panel base 4, and FIG. 13 (b) the height of the size of 4b of the projections 3a3,3b3 shown in FIG. 13, or FIG In 13 (a), in addition to the width dimension corresponding to the width dimension, it is configured with a width larger by a predetermined width, and the convex portions 3a3 and 3b3 are inclined from the underlap portions 2a and 2b to the surface of the panel base portion 4. By abutting against the surface side of the surfaces 4a and 4b, the concave portions of the lower end surface 3a1 and the left end surface 3b1 accommodate part of the decorative joints 11a and 11b including the inclined surfaces 4a and 4b, so that the smaller decorative joints 11a and 11b width _{w 2} is set.
[0041]
The concave portions of the lower end surface 3a1 and the left end surface 3b1 are cut by cutting the lower end surface 3a1 ′ at the beginning of molding and the left end surface 3b1 ′ at the beginning of molding leaving the convex portions 3a3 and 3b3. Other configurations are the same as those in the above embodiments, and the same effects can be obtained.
[0042]
【The invention's effect】
Since the present invention has the above-described configuration and operation, the inclined surface corresponding to the inclined surface extending from the underlap portion formed to ensure the releasability of the dewatering press to the surface of the building material base, An overlapping part provided so as to be able to join an inclined surface in the same direction or a convex part that abuts on the surface side of the inclined surface from the underlap part to the surface of the building material base so as to accommodate the inclined surface. By forming in the side edge part of this, the clearance gap of the joint part where the underlap part and overlap part of a square-shaped cement-type plate-shaped building material shape | molded by dehydration press molding can be made small.
[0043]
Moreover, according to the joined body of the rectangular cementitious plate-shaped building material having the joint structure according to the present invention, the underlap portion and the overlap portion of the square-shaped cementitious plate-shaped building material molded by dehydration press molding are provided. Since the gap between the joint portions to be joined can be reduced, the invasion of rainwater from the joint portions can be prevented without impairing the beauty of the joint structure.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a first embodiment of a dewatering press-molded building material according to the present invention.
2A is a cross-sectional view taken along line XX in FIG. 1, and FIG. 2B is a cross-sectional view taken along line YY in FIG.
FIG. 3 is a diagram showing a configuration of an inclined surface provided on a side end surface of an overlap portion.
FIG. 4 is a diagram showing a configuration of a joint portion when an underlap portion and an overlap portion are joined together.
FIG. 5 is a perspective view showing a configuration of a second embodiment of the dewatering press-molded building material according to the present invention.
6A is a cross-sectional view taken along line XX in FIG. 5, and FIG. 6B is a cross-sectional view taken along line YY in FIG.
FIG. 7 is a diagram illustrating a configuration of an inclined surface provided on a side end surface of an overlap portion.
FIG. 8 is a diagram showing a configuration of a joint portion when an underlap portion and an overlap portion are joined together.
FIG. 9 is a perspective view showing a configuration of a third embodiment of a dewatering press-molded building material according to the present invention.
10A is an XX sectional view of FIG. 9, and FIG. 10B is a YY sectional view of FIG.
FIG. 11 is a diagram illustrating a configuration of a convex portion provided on a side end surface of an overlap portion.
FIG. 12 is a diagram illustrating a configuration of a joint portion when an underlap portion and an overlap portion are joined together.
FIG. 13 is a diagram showing a configuration of another joint portion when the width of the convex portion is increased.
FIG. 14 is a perspective view illustrating a configuration of a conventional panel.
FIG. 15 is a schematic explanatory view showing a configuration of a dehydrating press.
16A is a cross-sectional view taken along the line XX in FIG. 14, and FIG. 16B is a cross-sectional view taken along the line YY in FIG.
FIG. 17 is a diagram illustrating a problem of a conventional example.
FIG. 18 is a perspective view illustrating a configuration of a panel on which a conventional cosmetic joint is formed.
19A is an XX sectional view of FIG. 18, and FIG. 19B is a YY sectional view of FIG.
FIG. 20 is a diagram illustrating a problem of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Panel 1a ... Front surface 1b ... Back surface 2a, 2b ... Underlap part 3a, 3b ... Overlap part 3a1 ... Lower end surface 3a1 '... Lower end surface 3b1 ... Left end surface 3b1' ... Initial left end surface 3a2, 3b2 ... Vertical surfaces 3a3, 3b3 ... Projections 4 ... Panel bases 4a to 4d ... Inclined surfaces 11a, 11b ... Coupling joints 11a1, 11b1 ... Inclined surfaces 70 ... Dehydration press 71 ... Upper mold 72 ... Lower mold 73 ... Outer mold Type 74 ... in the formwork

Claims

Has an overlap portion provided in underlap portion and the other end portion provided on one end or down, further underlap portion and the other end portion provided on one end of the left and right A rectangular cement-based plate-shaped building material that has an overlap portion provided and is molded by dehydration press molding, and is provided at a side end portion of the overlap portion so as to be connectable to the overlap portion. Corresponding to the inclined surface from the wrap portion to the surface of the building material base, when the inclination angle of the inclined surface with respect to the surface of the building material base is α, the side portion of the overlap portion is 180 with respect to the surface of the building material base. inclined surfaces having an angle smaller than °-.alpha., Moshiku the surface by the inclination of the inclined portion extending from said underlap portion on the surface side of a by該建member proximal a side edge portion of the O Barappu portion on the surface of the該建material base In Cement plate building material rectangular shape, characterized in that the formation of the convex portion having a Jill too wide.

In the method for manufacturing a rectangular cementitious plate-shaped building material, by dehydrating press molding, it has an underlap portion provided at one of the upper and lower ends and an overlap portion provided at the other end, and further, either left or right Forming a rectangular cementitious plate-like body having an underlap portion provided at one end and an overlap portion provided at the other end, and after curing, the side of the overlap portion of the plate-like body Corresponding to the inclined surface leading to the surface of the plate-like body base by cutting the end portion, when the inclination angle of the inclined surface with respect to the surface of the building material base is α, the side of the overlapping portion of the building material base inclined surfaces having an angle smaller than 180 °-.alpha. to the surface, Moshiku is inclined to reach the surfaces of該建material base from the underlap portion on the surface side of the該建material base a side edge portion of the O Barappu portion Table by surface inclination Method for manufacturing a cementitious plate construction materials rectangular shape according to claim 1, characterized in that the cementitious plate building material of rectangular shape to form a convex portion having a length longer than that occurring.

An underlap portion of the square-shaped cement-based plate-shaped building material according to claim 1 and an overlap portion of another rectangular cement-based plate-shaped building material according to claim 1 that can be joined to the underlap portion. A cemented plate-like building material joint having a joint structure to be joined together, and an inclined surface or a convex portion formed at a side end of the overlap portion can be joined to the overlap portion. A joined body of a rectangular cement-based plate-like building material having a joint structure joined to a surface side of an inclined surface extending from an underlap portion to a surface of a building material base.