JP4681157B2

JP4681157B2 - Bonding structure of molded building material, bonding method of molded building material and molded building material

Info

Publication number: JP4681157B2
Application number: JP2001206629A
Authority: JP
Inventors: 康城加藤
Original assignee: Misawa Homes Co Ltd
Current assignee: Misawa Homes Co Ltd
Priority date: 2001-07-06
Filing date: 2001-07-06
Publication date: 2011-05-11
Anticipated expiration: 2021-07-06
Also published as: JP2003020786A

Description

【０００１】
【発明が属する技術分野】
この発明は、樹脂成形技術を用いた建材の接合技術に関するものである。
【０００２】
【背景技術】
従来から、建材の材料には木材が使用されてきたが、近年では合成樹脂の成型品も多用されるようになってきた。木材を加工するのに比べて形状を自由に選択でき、工業化生産にも適しているためである。
【０００３】
最近では、木粉を含有させたいわゆる木プラの品質が高まり、天然木材の風合いを有する樹脂製建材の需要が高まっている。例えば、特開平７−２０８０２７号公報にて開示されている「見切り付き敷居」では、部屋と部屋との境目などに用いられる敷居を、天然木材の風合いを有する樹脂成型品によって提供している。
また、特開平７−１８０３２０号公報に開示されている「幕板構造」は、建物の外装の一部である幕板を、木粉を含有させた樹脂成型品にて提供している。この幕板は、出隅または入隅に用いる部材と平部分に用いる部材とを連結部材によって連結し、建物へ固定するものである。
【０００４】
なお、樹脂成型品は、その成型時におけるいわゆる「ひけ」を抑えるため、肉厚を所定寸法以下に抑える必要がある。このため、建材などで使用される厚さ寸法が必要な部材を成型するには、中空部分ができるのが一般的である。
【０００５】
【発明が解決しようとする課題】
さて、木粉を含有させた樹脂成型品を、例えば笠木として提供する場合、連結部分にはある程度の防水性が要求されることがある。そのような場合、突き合わせ部分に湿式コーキングを施したり、乾式シール材を挟んだりして、防水性を確保している。
しかし、湿式コーキングは施工性が乾式シール材を用いる場合に比べて劣り、乾式シール材は継ぎ目が目立つ、という欠点がある。
【０００６】
一方、接合部分を、別部材のカバー材で覆うという方法もあるが、部材点数が増加してしまうという欠点がある。
更に、接合部分に段差状を形成し、その段差部分を乾式シールするという方法も考えられるが、段差の削り代を調整しなければならないといった作業の煩雑さが予想される。
【０００７】
本発明が解決すべき課題は、樹脂成型品にて建材を形成するに際して、接合部でのある程度の防水性を確保しつつ、施工性や外観品質に優れた技術を提供することにある。
【０００８】
ここで、請求項１記載の発明の目的は、防水施工の手間を軽減でき、外観品質にも優れ、更に、二重の防水構造を簡易に達成できる成型建材の接合構造を提供することである。
また、請求項２記載の発明の目的は、特に、平面方向へ連続して連結させるのに防水施工の手間が軽減され、外観品質にも優れた成型建材の接合構造を提供することである。
【０００９】
請求項３記載の発明の目的は、防水施工の手間を軽減でき、外観品質にも優れ、更に、二重の防水構造を簡易に達成できる成型建材の接合方法を提供することである。
【００１０】
請求項４記載の発明の目的は、防水施工の手間を軽減でき、外観品質にも優れ、更に、二重の防水構造を簡易に達成できる成型建材を提供することである。
また、請求項５記載の発明の目的は、特に、平面方向へ連続して連結させるのに防水施工の手間が軽減され、外観品質にも優れた成型建材を提供することである。
【００１１】
【課題を解決するための手段】
本発明は、樹脂成型品に存在する中空部分を活用し、上記した目的を達成するためのものである。
以下、図面を参照させながら、請求項ごとに説明する。
【００１２】
【課題を解決するための手段】
請求項１記載の発明は、表面部１１および裏面部１２と、これらの表面部および裏面部間を接続する接続部１３と、表面部１１、裏面部１２、および接続部１３で囲まれる中空部分とを備えて構成されて中空構造を有する成型建材１０Ａ，１０Ｂにおいて、それぞれ接合のための部位を備えることによって相互に接合可能な成型建材の接合構造であって、一方の成型建材１０Ａは、裏面部１２を表面部１１に対してその面内方向に突出させることによって、前記接合のための部位となる接合用凸部１５が形成され、他方の成型建材１０Ｂは、表面部１１を裏面部１２に対してその面内方向に突出させることによって、前記接合のための部位となる接合用凹部１６が形成され、前記接合用凸部１５および接合用凹部１６間には、接合用凹部１６の端部側に固定され、かつ接合用凸部１５における裏面部１２へ密着して、一方の成型建材１０Ａにおける前記中空部分を封止する第１の防水シール材２０Ｂと、接合用凸部１５の端部側に固定され、かつ接合用凹部１６における表面部１１へ密着して、他方の成型建材１０Ｂにおける前記中空部分を封止する第２の防水シール材２０Ａとが配置されていることを特徴とする。
【００１３】
ここで、「成型建材」とは、樹脂等を押出成型法によって製造した建材を形成する部材である。具体的には、笠木、幕板、床板などである。「成型」の手段としては、押出成型が一般的には採用される。また、建材の材料としては、樹脂が一般的であるが、アルミニウム等の押出成型などによって成型が可能な各種材料を利用してもよい。
「防水シール材」としては、施工の手間を軽減する場合には乾式シール材を用いる。ただし、湿式コーキング材を本発明に含まない趣旨ではない。
【００１４】
また、「裏面部」は成型建材の裏面を含む肉厚部分つまり略板状に形成された部分を意味し、「表面部」は成型建材の表面を含む肉厚部分つまり略板状に形成された部分を意味する。また、「接続部」は、表面部１１および裏面部１２間を連結するリブ等の接続部分を意味する。これらの表面部１１、裏面部１２、接続部１３は、通常、押出成型等によって一体成型されている。
【００１５】
また、前記接合用凸部１５は、裏面部１２を表面部１１および接続部１３に対してその面内方向に突出させてもよいし、裏面部１２および接続部１３を表面部１１に対してその面内方向に突出させてもよい。すなわち、少なくとも裏面部１２が表面部１１に対してその面内方向（裏面部１２の面内方向つまりは裏面部１２の表面に沿った方向）に突出されていればよい。
同様に、前記接合用凹部１６は、表面部１１を裏面部１２および接続部１３に対してその面内方向に突出させてもよいし、表面部１１および接続部１３を裏面部１２に対してその面内方向に突出させてもよい。すなわち、少なくとも表面部１１が裏面部１２に対してその面内方向（表面部１１の面内方向つまりは表面部１１の表面に沿った方向）に突出されていればよい。
これらの構成は、接合用凸部１５および接合用凹部１６が接合可能なように適宜選択すればよい。
【００１６】
なお、面内方向とは、より詳細に説明すれば、表面部１１や裏面部１２の肉厚の厚さ方向に直交する方向であり、表面部１１や裏面部１２をそのまま延長した方向である。例えば、表面部１１、裏面部１２、接続部１３からなる中空構造の成型建材において、表面部１１および接続部１３の一部を切削削除して表面部１１のみを残した場合に、表面部１１は裏面部１２に対して表面部１１の面内方向に突出されることになる。裏面部１２の場合も同様に、表面部１１、接続部１３の一部を切削削除して裏面部１２のみを残した場合に、裏面部１２は表面部１１に対して裏面部１２の面内方向に突出されることになる。
【００１７】
本発明では、一方の成型建材１０Ａの接合用凸部１５へ、他方の成型建材１０Ｂの接合用凹部１６を重ね合わせる。すると、成型建材１０Ａ，１０Ｂの境目となる接合用凸部１５および接合用凹部１６においては、防水シール材２０Ａ，２０Ｂが前記接合用凸部１５における裏面部１２および前記接合用凹部１６における表面部１１へ密着し、防水処理されたこととなる。
【００１８】
ここにおいて、接合作業のみで防水施工が行え、しかも継ぎ目部分における防水構造が目に触れることはないため、外観品質にも優れている。
また、前記接合用凸部１５や接合用凹部１６は、押出成型等で構成された成型建材の表面部１１や裏面部１２、さらには接続部１３を削ることで形成できる。
すなわち、例えば、表面部１１や裏面部１２のみが残るように削ればよく、その削り代の把握も容易であるため、削り代の調整を容易にかつ正確に行うことができる。従って、前記接合用凸部１５や接合用凹部１６を簡単にかつ正確な寸法で形成することができ、これらの接合も容易に行うことができる。
さらに、防水シール材に乾式シール材を採用すれば、乾燥させる手間がないので、防水施工の手間は更に軽減される。
【００２０】
一方の成型建材１０Ａの接合用凸部１５へ、他方の成型建材１０Ｂの接合用凹部１６を重ね合わせるだけで、防水施工できるので、施工における手間が軽減される。また、成型建材１０Ａ，１０Ｂの継ぎ目部分における防水構造は、目に触れない箇所での防水シール材２０Ａ，２０Ｂによるものであって外観を良好にでき、しかも二重防水構造を達成できるため防水性能も向上できる。
【００２１】
請求項２記載の発明は、請求項１に記載した成型建材の接合構造を限定したものであり、成型建材１０Ｃは平面形状が矩形であり、且つ隣接する二辺に接合用凸部１５を設け、他の二辺に接合用凹部１６を設けたことを特徴とする。
本請求項にいう「成型建材」は、平面方向に連続した建材であり、例えば、床材、壁材などである。
【００２２】
図４および図５に示すように、本請求項に係る成型建材の接合構造によれば、一の成型建材１０Ｃにおける接合用凹部１６に対しては、他の成型建材１０Ｃの接合用凸部１５を重ね合わせればよい。これにより、本請求項に係る成型建材の接合構造は、平面方向へ連続させて接合させることができる。
【００２３】
請求項３記載の発明は、表面部１１および裏面部１２と、これらの表面部および裏面部間を接続する接続部１３と、表面部１１、裏面部１２、および接続部１３で囲まれる中空部分とを備えて構成されて中空構造を有する成型建材１０Ａ，１０Ｂにおいて、それぞれ接合のための部位を備えることによって相互に接合可能な成型建材の接合方法に係る。
すなわち、一方の成型建材１０Ａにおける前記接合のための部位として、裏面部１２を表面部１１に対してその面内方向に突出させることによって接合用凸部１５を形成するとともに、他方の成型建材１０Ｂにおける前記接合のための部位として、表面部１１を裏面部１２に対してその面内方向に突出させることによって接合用凹部１６を形成する建材成型手順と、接合用凹部１６の端部側に固定し、かつ接合用凸部１５における裏面部１２へ密着させて、一方の成型建材１０Ａにおける前記中空部分を第１の防水シール材２０Ｂで封止し、接合用凸部１５の端部側に固定し、かつ接合用凹部１６における表面部１１へ密着させて、他方の成型建材１０Ｂにおける前記中空部分を第２の防水シール材２０Ａで封止する防水準備手順と、前記防水シール材２０を挟み込むように接合用凸部１５および接合用凹部１６を位置させて成型建材１０Ａ，１０Ｂを接合させる接合手順とを備えたことを特徴とする。
【００２４】
防水準備手順があるため、接合手順によって成型建材１０Ａ，１０Ｂを接合させるのみで、接合部の防水性が確保される。
【００２６】
接合用凸部１５および接合用凹部１６の両方へ防水シール材２０Ａ，２０Ｂを固定しているので、接合手順によって成型建材１０Ａ，１０Ｂを接合させるのみで、二重の防水構造を構成できる。
【００２７】
請求項４記載の発明は、相互に接合して利用するための成型建材１０Ａ，１０Ｂに係る。
すなわち、表面部１１および裏面部１２と、これらの表面部および裏面部間を接続する接続部１３と、表面部１１、裏面部１２、および接続部１３で囲まれる中空部分とを備えて構成されて中空構造を有するとともに、他の成型建材に接合される少なくとも２つの辺縁のうちの一方には、裏面部１２を表面部１１に対してその面内方向に突出させて接合用凸部１５を形成し、他方の辺縁には、表面部１１を裏面部１２に対してその面内方向に突出させて接合用凹部１６を形成し、接合用凸部１５および接合用凹部１６間には、接合用凹部１６の端部側に固定され、かつ接合用凸部１５における裏面部１２へ密着して、他の成型建材における前記中空部分を封止する第１の防水シール材２０Ｂと、接合用凸部１５の端部側に固定され、かつ接合用凹部１６における表面部１１へ密着して、他の成型建材１０Ｂにおける中空部分を封止する第２の防水シール材２０Ａとが配置されている成型建材である。
【００２８】
以上のような成型建材を複数備え、一の成型建材１０Ａの接合用凸部１５と他の一の成型建材１０Ｂの接合用凹部１６とを接合させるのみで、接合部の防水性が確保される。
【００２９】
請求項５記載の発明は、請求項４記載の成型建材を限定したものであり、平面形状を矩形とし、隣接する二辺に接合用凸部１５を設け、他の二辺に接合用凹部１６を設けたことを特徴とする。
【００３０】
一の成型建材１０Ｃにおける接合用凹部１６に対しては、他の成型建材１０Ｃの接合用凸部１５を重ね合わせればよい。これにより、本請求項に係る成型建材の接合構造は、平面方向へ連続させて接合させることができる。
【００３１】
【発明の実施の形態】
以下、本発明を実施の形態及び図面に基づいて、更に詳しく説明する。ここで使用する図面は、図１乃至図５である。図１から図３は、第一の実施形態について説明するための図面であり、図４および図５は、第一の実施形態について説明するための図面である。
【００３２】
（第一の実施形態）
第一の実施形態は、本発明の概念を笠木に用いた場合を示している。すなわち、表面部１１、裏面部１２、接続部１３を備えて構成されて中空構造を有する成型建材１０Ａ，１０Ｂである笠木において、それぞれ接合のための部位を備えることによって相互に接合可能な成型建材の接合構造である。
ここで、その笠木は、セルロース系材料の微粉末の表面にこの微粉末よりも小径で、かつ、硬い微粉末を担持させて作成した粉体を混合した樹脂を着色成形することによって木目模様を呈するように形成した。このような成型方法を採用すると、模様および質感による風合いが天然木に近いものとなる。
【００３３】
一方の成型建材１０Ａは、前記接合のための部位を、裏面部１２を表面部１１および接続部１３に対してその面内方向に突出させることによって接合用凸部１５を形成している。この接合用凸部１５は、図３に示すように、押出成型にて形成した成型建材１０Ａの一端から表面部１１、接続部１３を切り落とすことで作成する。
すなわち、表面部１１および接続部１３を切削する際に、接続部１３が裏面部１２の表面と同一平面上（面一）になるまで切削し、裏面部１２のみを残せばよい。このため、接合用凸部１５を形成する際には、作業者が目視により切削部分を確認することもできるし、所定のセンサによって裏面部１２の表面位置までカッター等を移動させればよく、接合用凸部１５を正確な厚さ寸法で簡単に形成することができる。
【００３４】
他方の成型建材１０Ｂは、前記接合のための部位を、表面部１１を裏面部１２および接続部１３に対してその面内方向に突出させることによって接合用凹部１６を形成している。この接合用凹部１６も、接合用凸部１５と同様に、押出成型にて形成した成型建材１０Ｂの一端から裏面部１２、接続部１３の一部を切り落とすことで、正確な厚さ寸法で簡単に形成することができる。
【００３５】
そして、前記接合用凸部１５および接合用凹部１６においては、前記接合用凸部１５における裏面部１２および前記接合用凹部１６における表面部１１へ密着する正面コ字形の防水シール材２０Ａ，２０Ｂを位置させ、接着剤等で固定する。なお、第２の防水シール材２０Ｂを接合用凹部１６の端部側へ、第１の防水シール材２０Ａを接合用凸部１５の端部側へ、それぞれ固定することとしている。
ここでは、防水シール材としては、乾式のものを採用している。
【００３６】
このように構成された成型建材１０Ａ，１０Ｂを接合するには、図２に示すように、一方の成型建材１０Ａの接合用凸部１５へ、他方の成型建材１０Ｂの接合用凹部１６を重ね合わせる。すると、成型建材１０Ａ，１０Ｂの境目となる接合用凸部１５および接合用凹部１６においては、防水シール材２０Ａ，２０Ｂが前記接合用凸部１５における裏面部１２の表面および前記接合用凹部１６における表面部１１の裏面に密着し、二重の防水処理が施される。すなわち、防水施工の手間は軽減され、しかも継ぎ目部分における防水構造が目に触れることはないため、外観品質にも優れている。
【００３７】
このような本実施形態においては、次のような効果がある。
（１）接合用凸部１５および接合用凹部１６を重ね合わせて、成型建材１０Ａ，１０Ｂを接合しており、これらの接合用凸部１５および接合用凹部１６間に防水シール材２０Ａ，２０Ｂを介在させているので、防水シール材２０Ａ，２０Ｂが外部に露出せず、外観品質に優れた接合構造とすることができる。
【００３８】
（２）また、各成型建材１０Ａ，１０Ｂは、表面部１１、裏面部１２、接続部１３からなり、これらの各部１１〜１３で囲まれた中空部分を備えた中空構造で構成されているので、軽量でかつ強度を高めることができる。
その上、接合用凸部１５、接合用凹部１６を形成する際には、裏面部１２や表面部１１のみが残るように表面部１１や裏面部１２、さらには接続部１３を適宜切削すればよいため、接合用凸部１５や接合用凹部１６の肉厚寸法を正確にかつ簡単に設定できる。
【００３９】
（３）接合用凸部１５および接合用凹部１６が上下に重なっているので、仮に接合用凹部１６の先端と成型建材１０Ａの表面部１１との間に目地（隙間）を形成した場合でも、その目地からは接合用凸部１５が露出するだけであり、笠木である成型建材１０Ａ，１０Ｂを支持する下地材（フレーム、支柱等）は露出しないので、外観意匠の低下を防止することができる。
【００４０】
（４）接合用凸部１５および接合用凹部１６間には、２つの防水シール材２０Ａ，２０Ｂが、各成型建材１０Ａ，１０Ｂの接合方向つまり成型建材１０Ａ，１０Ｂの長手方向の異なる２カ所に配置されているので、２重の防水ラインを形成でき、防水性能を向上することができる。
【００４１】
（第二の実施形態）
第二の実施形態は、本発明の概念を床材などの面材に用いた場合を示している。すなわち、面材たる成型建材１０Ｃは平面形状が矩形であり、且つ隣接する二辺において接合用凸部１５を備え、他の二辺において接合用凹部１６を備えるように形成している。
【００４２】
接合用凸部１５は、表面部１１、裏面部１２、接続部１３を備えて構成され、押出成型にて形成した成型建材１０Ｃにおける隣接する二辺の一端から表面部１１および接続部１３の一部を切り落とすことで作成する。接合用凹部１６は、成型建材１０Ｃにおける他の二辺の一端から裏面部１２および接続部１３の一部を切り落とすことで作成する。
接合用凸部１５の端部には、表面部１１に向かって突出するように防水シール材２０を固定している。
【００４３】
以上のように構成された面材たる成型建材１０Ｃは、図５に示すように、面方向へ連続するように接合することができる。すなわち、防水シール材２０を挟み込むように、一の成型建材１０Ｃにおける接合用凸部１５へ、他の一の成型建材１０Ｃにおける接合用凹部１６を位置させて接合させるのである。
【００４４】
このような本実施形態においても、前記第１実施形態の（１）〜（３）と同様の作用効果を奏することができる。すなわち、防水施工の手間は軽減され、しかも継ぎ目部分における防水構造が目に触れることはないため、外観品質にも優れている。
【００４５】
さらに、各成型建材１０Ｃ間の目地部分において、その目地は接合用凸部１５で塞がれており、各成型建材１０Ｃの下側に配置された下地材などが露出することがないため、特に床や壁等を形成する際に、外観意匠を向上することができ、床材や壁材として非常に優れた特性を備えている。
【００４６】
また、平面矩形状（長方形状）の成型建材１０Ｃにおいて、隣接する二辺に接合用凸部１５を形成し、他の二辺に接合用凹部１６を形成したので、各成型建材１０Ｃを並べて敷き詰める際に、接合用凸部１５および接合用凹部１６が重なる点のみを注意すればよく、非常に簡単に施工することができる。
【００４７】
なお、本発明は前記各実施形態に限らず、本発明の目的を達成できる範囲での変形、改良などは本発明に含まれるものである。
すなわち、前記実施形態では、表面部１１および接続部１３を削って接合用凸部１５を形成していたが、表面部１１のみを削って接合用凸部１５を形成してもよい。この場合には、表面部１１のみで構成された接合用凹部１６と重ねた際に、表面部１１に接続部１３が当接するため、接合用凹部１６に荷重が加わった際に、その荷重を接続部１３を介して接合用凸部１５側でも支持でき、接合強度を向上できる利点がある。
なお、この場合、厚さ寸法が小さいシート状の防水シール材を、接続部１３および表面部１１間に配置したり、各接続部１３間の隙間部分に防水シール材を配置して防水構造を確保すればよい。さらには、接続部１３の一部分を削って、防水シール材２０Ａを配置してもよい。
【００４８】
同様に、裏面部１２のみを削って接合用凹部１６を形成してもよい。この場合にも、裏面部１２のみで構成された接合用凸部１５と重ねた際に、裏面部１２に接続部１３が当接し、接合強度を向上できる利点がある。
【００４９】
また、本発明は、笠木、幕板、床板等に限らず、例えば、角筒状、円筒状の柱材等に適用してもよいし、断面Ｌ字状、コ字状等の部材（例えば化粧カバー材）等に適用してもよい。すなわち、表面部となる表面角筒部と、この角筒部の内部に設けられて裏面部となる裏面角筒部と、これらの各角筒部間を接続する接続部とからなる柱材の接合部分等に本発明を適用してもよい。従って、成型建材の断面形状、つまり表面部１１、裏面部１２の断面形状は、第１実施形態のような略コ字状や、第２実施形態のような略Ｉ字状のものに限らず、断面略Ｌ字状、三角形状等でもよく、これらは本発明を使用する部材の種類等に応じて適宜設定すればよい。
さらに、成型建材の材質も、樹脂や金属等、成型建材に要求される性能や意匠等に応じて適宜設定すればよい。
【００５０】
【発明の効果】
請求項１記載の発明によれば、防水施工の手間は軽減され、外観品質にも優れた成型建材の接合構造を提供することができた。
また、請求項２記載の発明によれば、更に、二重の防水構造を簡易に達成できる成型建材の接合構造を提供することができた。
また、請求項３記載の発明によれば、特に、平面方向へ連続して連結させるのに防水施工の手間が軽減され、外観品質にも優れた成型建材の接合構造を提供することができた。
【００５１】
請求項４記載の発明によれば、防水施工の手間は軽減され、外観品質にも優れた成型建材の接合方法を提供することができた。
また、請求項５記載の発明によれば、更に、二重の防水構造を簡易に達成できる成型建材の接合方法を提供することができた。
【００５２】
請求項６記載の発明によれば、防水施工の手間は軽減され、外観品質にも優れた成型建材を提供することができた。
また、請求項７記載の発明によれば、更に、二重の防水構造を簡易に達成できる成型建材を提供することができた。
【図面の簡単な説明】
【図１】本発明の概念を笠木に用いた場合の組立斜視図である。
【図２】本発明の概念を笠木に用いた場合の組立断面図である。
【図３】本発明の概念を笠木に用いた場合における製造過程を示す斜視図である。
【図４】本発明の概念を面材に用いた場合の斜視図である。
【図５】本発明の概念を面材に用いた場合の平面図である。
【符号の説明】
１０Ａ成型建材（凸型）
１０Ｂ成型建材（凹型）
１０Ｃ成型建材（面方向連続型）
１１表面部
１２裏面部
１３接続部
１５接合用凸部
１６接合用凹部
２０防水シール材
２０Ａ防水シール材
２０Ｂ防水シール材[0001]
[Technical field to which the invention belongs]
The present invention relates to a joining technique for building materials using a resin molding technique.
[0002]
[Background]
Conventionally, wood has been used as a material for building materials, but in recent years, synthetic resin molded products have also been frequently used. This is because the shape can be freely selected as compared with processing wood and is suitable for industrial production.
[0003]
Recently, the quality of so-called wood plastics containing wood flour has increased, and the demand for resin-made building materials having the texture of natural wood has increased. For example, in the “sill with parting” disclosed in Japanese Patent Application Laid-Open No. 7-208027, a sill used for a boundary between rooms is provided by a resin molded product having a texture of natural wood.
Japanese Patent Laid-Open No. 7-180320 discloses a “screenboard structure” which provides a screenboard, which is a part of the exterior of a building, as a resin molded product containing wood powder. In this curtain plate, a member used for an exit corner or an entrance corner and a member used for a flat portion are connected by a connecting member and fixed to a building.
[0004]
In addition, it is necessary to suppress the thickness of the resin molded product to a predetermined dimension or less in order to suppress so-called “sinking” at the time of molding. For this reason, in order to shape | mold the member which needs the thickness dimension used by building materials etc., it is common that a hollow part is made.
[0005]
[Problems to be solved by the invention]
Now, when a resin molded product containing wood powder is provided as, for example, a headboard, a certain degree of waterproofness may be required for the connecting portion. In such a case, wet coking is applied to the butt portion or a dry sealing material is sandwiched to ensure waterproofness.
However, wet caulking is inferior in terms of workability compared to the case where a dry sealing material is used, and the dry sealing material has a drawback that seams are conspicuous.
[0006]
On the other hand, there is a method of covering the joint portion with a cover member of another member, but there is a disadvantage that the number of members increases.
Furthermore, although a method of forming a stepped shape at the joint portion and dry-sealing the stepped portion is conceivable, it is expected that the work is complicated in that the cutting allowance for the step must be adjusted.
[0007]
The problem to be solved by the present invention is to provide a technique excellent in workability and appearance quality while ensuring a certain degree of waterproofness at the joint when forming a building material with a resin molded product.
[0008]
The object of the invention described in claim 1 is to provide a joint structure of molded building materials that can reduce the labor of waterproof construction, is excellent in appearance quality, and can easily achieve a double waterproof structure. .
Further, an object of the invention of claim 2 is to provide a joint structure for molded building materials which is reduced in the work of waterproofing construction and is excellent in appearance quality, particularly for continuous connection in the plane direction.
[0009]
The object of the invention described in claim 3 is to provide a method for joining molded building materials, which can reduce the labor of waterproof construction, is excellent in appearance quality, and can easily achieve a double waterproof structure .
[0010]
The object of the invention described in claim 4 is to provide a molded building material that can reduce the trouble of waterproof construction, is excellent in appearance quality, and can easily achieve a double waterproof structure .
Further, an object of the invention of claim 5 is to provide a molded building material that is reduced in labor for waterproofing construction and is excellent in appearance quality , in particular, for continuous connection in the plane direction .
[0011]
[Means for Solving the Problems]
The present invention uses a hollow portion present in a resin molded product to achieve the above-described object.
Hereinafter, each claim will be described with reference to the drawings.
[0012]
[Means for Solving the Problems]
The invention according to claim 1 is a hollow portion surrounded by the front surface portion 11 and the back surface portion 12, the connection portion 13 connecting the front surface portion and the back surface portion, and the front surface portion 11, the back surface portion 12, and the connection portion 13. In the molded building materials 10A and 10B having a hollow structure, each of the molded building materials 10A and 10B can be bonded to each other by providing a portion for bonding. By projecting the portion 12 in the in-plane direction with respect to the surface portion 11, a bonding convex portion 15 that becomes a portion for the bonding is formed, and the other molded building material 10 B has the surface portion 11 as the back surface portion 12. by projecting in its plane direction relative to the joining recess 16 serving as the site for bonding is formed, said between bonding projection 15 and the joining recess 16, joining recess 16 A first waterproof sealing material 20B which is fixed to the end side and is in close contact with the back surface portion 12 of the bonding convex portion 15 and seals the hollow portion of one molded building material 10A; A second waterproof sealing material 20A that is fixed to the end side and is in close contact with the surface portion 11 of the bonding recess 16 and seals the hollow portion of the other molded building material 10B is disposed. And
[0013]
Here, the “molded building material” is a member that forms a building material produced by extrusion molding of resin or the like. Specifically, it is a headboard, a curtain, a floorboard. As a means of “molding”, extrusion molding is generally employed. In addition, resin is generally used as a material for building materials, but various materials that can be molded by extrusion molding such as aluminum may be used.
As the “waterproof seal material”, a dry seal material is used in order to reduce the labor of construction. However, this does not mean that the wet coking material is not included in the present invention.
[0014]
Further, the “back surface portion” means a thick portion including the back surface of the molded building material, that is, a portion formed in a substantially plate shape, and the “front surface portion” is formed in a thick portion including the surface of the molded building material, that is, a substantially plate shape. Means the part. The “connecting portion” means a connecting portion such as a rib connecting the front surface portion 11 and the back surface portion 12. These front surface portion 11, back surface portion 12, and connection portion 13 are usually integrally formed by extrusion molding or the like.
[0015]
Moreover, the said convex part 15 for a joint may make the back surface part 12 protrude in the in-plane direction with respect to the surface part 11 and the connection part 13, or the back surface part 12 and the connection part 13 with respect to the surface part 11. You may make it protrude in the in-plane direction. In other words, at least the back surface portion 12 has only to protrude in the in-plane direction (the in-plane direction of the back surface portion 12, that is, the direction along the surface of the back surface portion 12) with respect to the front surface portion 11.
Similarly, the bonding recess 16 may cause the front surface portion 11 to protrude in the in-plane direction with respect to the back surface portion 12 and the connection portion 13, or the front surface portion 11 and the connection portion 13 to the back surface portion 12. You may make it protrude in the in-plane direction. That is, at least the front surface portion 11 has only to protrude in the in-plane direction (the in-plane direction of the front surface portion 11, that is, the direction along the surface of the front surface portion 11) with respect to the back surface portion 12.
These configurations may be appropriately selected so that the bonding convex portion 15 and the bonding concave portion 16 can be bonded.
[0016]
In more detail, the in-plane direction is a direction orthogonal to the thickness direction of the thickness of the front surface portion 11 and the back surface portion 12, and is a direction in which the front surface portion 11 and the back surface portion 12 are extended as they are. . For example, in a molded building material having a hollow structure composed of a front surface portion 11, a back surface portion 12, and a connection portion 13, when only a part of the front surface portion 11 and the connection portion 13 is removed by cutting and the front surface portion 11 is left, the front surface portion 11. Is projected in the in-plane direction of the front surface portion 11 with respect to the back surface portion 12. Similarly, in the case of the back surface portion 12, when a part of the front surface portion 11 and the connection portion 13 are cut and deleted to leave only the back surface portion 12, the back surface portion 12 is in the plane of the back surface portion 12 with respect to the front surface portion 11. Will protrude in the direction.
[0017]
In the present invention, the bonding concave portion 16 of the other molded building material 10B is superimposed on the bonding convex portion 15 of one molded building material 10A. Then, in the joint convex part 15 and the joint concave part 16 which are the boundary between the molded building materials 10A and 10B, the waterproof seal materials 20A and 20B are the back surface part 12 in the joint convex part 15 and the surface part in the joint concave part 16. 11 and is waterproofed.
[0018]
Here, the waterproof construction can be performed only by the joining operation, and the waterproof structure at the joint portion is not in contact with the eyes, so the appearance quality is excellent.
Moreover, the said convex part 15 for joining and the recessed part 16 for joining can be formed by scraping the surface part 11 and the back surface part 12, and also the connection part 13 of the shaping | molding building material comprised by extrusion molding etc.
That is, for example, it is only necessary to cut so that only the front surface portion 11 and the back surface portion 12 remain, and since it is easy to grasp the cutting allowance, the cutting allowance can be adjusted easily and accurately. Therefore, the joining convex portion 15 and the joining concave portion 16 can be easily and accurately formed, and the joining can be easily performed.
Furthermore, if a dry sealing material is adopted as the waterproof sealing material, there is no need to dry, so that the labor for waterproofing is further reduced.
[0020]
Since the waterproof construction can be performed only by superimposing the joint concave portion 16 of the other molded building material 10B on the joint convex portion 15 of the one molded building material 10A, labor in construction is reduced. In addition, the waterproof structure at the joint portion of the molded building materials 10A and 10B is based on the waterproof seal materials 20A and 20B where the eyes cannot be touched, so that the external appearance can be improved and a double waterproof structure can be achieved. Can also be improved.
[0021]
The invention described in claim 2 limits the joint structure of the molded building material described in claim 1, and the molded building material 10C has a rectangular planar shape, and is provided with bonding convex portions 15 on two adjacent sides. In addition, a bonding recess 16 is provided on the other two sides.
The “molded building material” referred to in the present claims is a building material continuous in the plane direction, such as a flooring material or a wall material.
[0022]
As shown in FIG. 4 and FIG. 5, according to the joint structure of molded building materials according to this claim, the joint convex portion 15 of another molded building material 10 C with respect to the joint concave portion 16 in one molded building material 10 C. Can be superimposed. Thereby, the joining structure of the molding building material which concerns on this claim can be joined continuously in a plane direction.
[0023]
The invention described in claim 3 is a hollow portion surrounded by the front surface portion 11 and the back surface portion 12, the connection portion 13 connecting the front surface portion and the back surface portion, and the front surface portion 11, the back surface portion 12, and the connection portion 13. In the molded building materials 10A and 10B having a hollow structure, each of the molded building materials 10A and 10B includes a portion for bonding.
That is, as the part for the joining in one molded building material 10A, the back surface 12 is protruded in the in-plane direction with respect to the front surface 11, thereby forming the bonding convex portion 15 and the other molded building material 10B. As a part for joining, a building material molding procedure for forming the concave portion 16 for bonding by projecting the front surface portion 11 in the in-plane direction with respect to the rear surface portion 12, and fixing to the end side of the concave portion 16 for bonding In addition, the hollow portion of one molded building material 10A is sealed with the first waterproof seal material 20B and fixed to the end portion side of the bonding convex portion 15. and, and in intimate contact to the surface portion 11 of the joining recess 16, a waterproof preparation procedure for sealing the hollow portion of the other molding building materials 10B in the second waterproof sealing member 20A, the anti Positions the joint projections 15 and the joining recess 16 so as to sandwich the sealing member 20 is characterized in that a bonding procedure molded building materials 10A, bonding the 10B with.
[0024]
Since there is a waterproof preparation procedure, the waterproof property of the joint is ensured only by joining the molded building materials 10A and 10B by the joining procedure.
[0026]
Since the waterproof sealing materials 20A and 20B are fixed to both the bonding convex portion 15 and the bonding concave portion 16, a double waterproof structure can be configured only by bonding the molded building materials 10A and 10B by a bonding procedure.
[0027]
The invention according to claim 4 relates to the molded building materials 10A and 10B to be joined to each other.
That is, it is configured to include a front surface portion 11 and a back surface portion 12, a connection portion 13 that connects between the front surface portion and the back surface portion, and a hollow portion surrounded by the front surface portion 11, the back surface portion 12, and the connection portion 13. In addition to having a hollow structure, one of at least two edges to be joined to another molded building material has a back surface portion 12 protruding in the in-plane direction with respect to the front surface portion 11 and a joint convex portion 15. In the other edge, the front surface portion 11 is protruded in the in-plane direction with respect to the back surface portion 12 to form a concave portion 16 for bonding, and between the convex portion 15 for bonding and the concave portion 16 for bonding, A first waterproof sealing material 20B that is fixed to the end portion side of the bonding concave portion 16 and is in close contact with the back surface portion 12 of the bonding convex portion 15 to seal the hollow portion in the other molded building material; Fixed to the end side of the convex portion 15 and joined In close contact with the surface 11 of the recess 16 is a molded building material and the second waterproof sealing member 20A which seals the hollow portion is arranged in the other molding building materials 10B.
[0028]
A plurality of molded building materials as described above are provided, and only by joining the bonding convex portion 15 of one molded building material 10A and the bonding concave portion 16 of the other molded building material 10B, waterproofness of the bonded portion is ensured. .
[0029]
The invention according to claim 5 limits the molded building material according to claim 4 , has a rectangular planar shape, is provided with bonding convex portions 15 on two adjacent sides, and has a bonding concave portion 16 on the other two sides. Is provided.
[0030]
What is necessary is just to superimpose the convex part 15 for joining of other molded building materials 10C with respect to the concave part 16 for joining in 10C of one molded building material. Thereby, the joining structure of the molding building material which concerns on this claim can be joined continuously in a plane direction.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail based on embodiments and drawings. The drawings used here are FIGS. 1 to 5. FIGS. 1 to 3 are drawings for explaining the first embodiment, and FIGS. 4 and 5 are drawings for explaining the first embodiment.
[0032]
(First embodiment)
1st embodiment has shown the case where the concept of this invention is used for a coping. That is, in the caps that are the molding building materials 10A and 10B that are configured to include the front surface portion 11, the back surface portion 12, and the connection portion 13 and have a hollow structure, the molding building materials that can be bonded to each other by providing the respective portions for bonding. This is a joining structure.
Here, the headboard is formed by coloring and molding a resin mixed with a powder made by supporting a hard fine powder having a diameter smaller than that of the fine powder on the surface of the fine powder of the cellulosic material. It was formed to exhibit. When such a molding method is employed, the texture due to the pattern and texture becomes close to that of natural wood.
[0033]
One molded building material 10 A forms a bonding convex portion 15 by projecting the back surface portion 12 in the in-plane direction with respect to the front surface portion 11 and the connecting portion 13. As shown in FIG. 3, the bonding convex portion 15 is created by cutting off the surface portion 11 and the connecting portion 13 from one end of a molded building material 10 A formed by extrusion molding.
That is, when the front surface portion 11 and the connection portion 13 are cut, the connection portion 13 may be cut until it is flush with the surface of the back surface portion 12 so that only the back surface portion 12 remains. For this reason, when forming the convex part 15 for joining, an operator can also confirm a cutting part by visual observation, what is necessary is just to move a cutter etc. to the surface position of the back part 12 by a predetermined sensor, The joining convex portion 15 can be easily formed with an accurate thickness dimension.
[0034]
The other molding building material 10 B forms a concave portion 16 for bonding by causing the surface portion 11 to protrude in the in-plane direction with respect to the rear surface portion 12 and the connecting portion 13. As with the bonding convex portion 15, the bonding concave portion 16 is also easy with an accurate thickness by cutting off the back surface portion 12 and a part of the connecting portion 13 from one end of the molded building material 10 B formed by extrusion molding. Can be formed.
[0035]
And in the said convex part 15 for joining and the recessed part 16 for joining, the front surface U-shaped waterproof seal material 20A, 20B which closely_contact | adheres to the back surface part 12 in the said convex part 15 for joining and the surface part 11 in the said recessed part 16 for joining is carried out. Position and fix with adhesive or the like. The second waterproof sealing material 20B is fixed to the end portion side of the bonding concave portion 16, and the first waterproof sealing material 20A is fixed to the end portion side of the bonding convex portion 15.
Here, a dry-type sealing material is adopted as the waterproof sealing material.
[0036]
In order to join the molded building materials 10A and 10B configured as described above, as shown in FIG. 2, the bonding concave portion 16 of the other molded building material 10B is superimposed on the bonding convex portion 15 of one molded building material 10A. . Then, in the bonding convex portion 15 and the bonding concave portion 16 which are the boundary between the molded building materials 10A and 10B, the waterproof seal materials 20A and 20B are in the surface of the back surface portion 12 in the bonding convex portion 15 and the bonding concave portion 16. It adheres to the back surface of the front surface part 11 and is subjected to double waterproofing treatment. That is, the work for waterproofing is reduced, and the waterproof structure at the seam portion is not touched, so the appearance quality is excellent.
[0037]
Such an embodiment has the following effects.
(1) The bonding convex portions 15 and the bonding concave portions 16 are overlapped to join the molded building materials 10A and 10B, and the waterproof seal materials 20A and 20B are interposed between the bonding convex portions 15 and the bonding concave portions 16. Since it is interposed, the waterproof sealing materials 20A and 20B are not exposed to the outside, and a joining structure with excellent appearance quality can be obtained.
[0038]
(2) Moreover, since each molding building material 10A, 10B consists of the front-surface part 11, the back surface part 12, and the connection part 13, and is comprised by the hollow structure provided with the hollow part enclosed by these each part 11-13. Light weight and high strength.
In addition, when forming the bonding convex portion 15 and the bonding concave portion 16, the front surface portion 11, the back surface portion 12, and the connection portion 13 are appropriately cut so that only the back surface portion 12 and the front surface portion 11 remain. Therefore, the thickness dimensions of the bonding convex portion 15 and the bonding concave portion 16 can be set accurately and easily.
[0039]
(3) Since the bonding convex portion 15 and the bonding concave portion 16 overlap each other, even if a joint (gap) is formed between the tip of the bonding concave portion 16 and the surface portion 11 of the molded building material 10A, Since only the joint projection 15 is exposed from the joint, and the base material (frame, column, etc.) that supports the molded building materials 10A and 10B, which are headboards, is not exposed, it is possible to prevent the appearance design from being deteriorated. .
[0040]
(4) The two waterproof sealing materials 20A and 20B are provided between the bonding convex portion 15 and the bonding concave portion 16 at two places where the bonding directions of the molded building materials 10A and 10B, that is, the longitudinal directions of the molded building materials 10A and 10B are different. Since it is arranged, a double waterproof line can be formed and the waterproof performance can be improved.
[0041]
(Second embodiment)
2nd embodiment has shown the case where the concept of this invention is used for surface materials, such as a flooring. That is, the molded building material 10C, which is a face material, has a rectangular planar shape, and is provided with a bonding convex portion 15 on two adjacent sides and a bonding concave portion 16 on the other two sides.
[0042]
The joining convex portion 15 includes a front surface portion 11, a back surface portion 12, and a connection portion 13, and one of the surface portion 11 and the connection portion 13 from one end of two adjacent sides in the molded building material 10 C formed by extrusion molding. Created by cutting off parts. The bonding recess 16 is created by cutting off a part of the back surface portion 12 and the connection portion 13 from one end of the other two sides of the molded building material 10C.
A waterproof sealing material 20 is fixed to the end of the bonding convex portion 15 so as to protrude toward the surface portion 11.
[0043]
As shown in FIG. 5, the molded building material 10 C, which is a face material configured as described above, can be joined so as to be continuous in the surface direction. That is, the bonding concave portion 16 in the other molded building material 10C is positioned and bonded to the bonding convex portion 15 in one molded building material 10C so as to sandwich the waterproof seal material 20.
[0044]
Also in this embodiment, the same effects as (1) to (3) of the first embodiment can be achieved. That is, the work for waterproofing is reduced, and the waterproof structure at the seam portion is not touched, so the appearance quality is excellent.
[0045]
Furthermore, in the joint portions between the respective molded building materials 10C, the joints are closed by the joining convex portions 15, and the base material disposed under the respective molded building materials 10C is not exposed. When forming a floor, a wall, etc., the appearance design can be improved, and it has excellent properties as a flooring material or a wall material.
[0046]
Further, in the planar rectangular (rectangular) molded building material 10C, the bonding convex portions 15 are formed on the two adjacent sides and the bonding concave portions 16 are formed on the other two sides. At this time, it is only necessary to pay attention to the point where the bonding convex portion 15 and the bonding concave portion 16 overlap each other, and the construction can be performed very easily.
[0047]
The present invention is not limited to the above-described embodiments, but includes modifications and improvements as long as the object of the present invention can be achieved.
That is, in the above-described embodiment, the surface portion 11 and the connection portion 13 are cut to form the bonding convex portion 15, but only the surface portion 11 may be cut to form the bonding convex portion 15. In this case, since the connecting portion 13 comes into contact with the surface portion 11 when it is overlapped with the bonding concave portion 16 composed only of the surface portion 11, the load is applied when a load is applied to the bonding concave portion 16. It can be supported even on the side of the bonding convex portion 15 via the connection portion 13 and has an advantage that the bonding strength can be improved.
In this case, a sheet-like waterproof sealing material having a small thickness is disposed between the connecting portion 13 and the surface portion 11, or a waterproof sealing material is disposed in a gap portion between each connecting portion 13 to provide a waterproof structure. What is necessary is just to secure. Furthermore, a part of the connection part 13 may be shaved and the waterproof sealing material 20A may be disposed.
[0048]
Similarly, only the back surface portion 12 may be scraped to form the bonding recess 16. In this case as well, there is an advantage that the connecting portion 13 comes into contact with the back surface portion 12 and can improve the bonding strength when it is overlapped with the bonding convex portion 15 constituted only by the back surface portion 12.
[0049]
Further, the present invention is not limited to the headboard, the curtain, the floor board, and the like, and may be applied to, for example, a rectangular tube shape, a cylindrical column material, etc. It may be applied to a decorative cover material. That is, a column member composed of a surface square tube portion serving as a front surface portion, a back surface square tube portion provided inside the square tube portion and serving as a back surface portion, and a connection portion connecting these square tube portions. You may apply this invention to a junction part. Therefore, the cross-sectional shape of the molded building material, that is, the cross-sectional shape of the front surface portion 11 and the back surface portion 12 is not limited to the substantially U shape as in the first embodiment or the substantially I shape as in the second embodiment. The cross section may be substantially L-shaped, triangular, or the like, and these may be set as appropriate according to the type of member using the present invention.
Furthermore, the material of the molded building material may be appropriately set according to the performance and design required for the molded building material such as resin and metal.
[0050]
【The invention's effect】
According to invention of Claim 1, the effort of waterproof construction was reduced and the joining structure of the molding building material which was excellent also in the external appearance quality was able to be provided.
Moreover, according to invention of Claim 2, the joining structure of the molding building material which can achieve a double waterproof structure easily was able to be provided.
In addition, according to the invention described in claim 3, in particular, it is possible to provide a joint structure for molded building materials that reduces the time and effort required for waterproof construction for continuous connection in the plane direction, and is excellent in appearance quality. .
[0051]
According to invention of Claim 4, the effort of waterproof construction was reduced and the joining method of the molding building material which was excellent also in external appearance quality was able to be provided.
Moreover, according to invention of Claim 5, the joining method of the molding building material which can achieve a double waterproof structure easily was able to be provided.
[0052]
According to invention of Claim 6, the effort of waterproof construction was reduced and the molding building material excellent in the external appearance quality was able to be provided.
Moreover, according to invention of Claim 7, the molded building material which can achieve a double waterproof structure easily was able to be provided.
[Brief description of the drawings]
FIG. 1 is an assembled perspective view when the concept of the present invention is applied to a headboard.
FIG. 2 is an assembly cross-sectional view when the concept of the present invention is used for a headboard.
FIG. 3 is a perspective view showing a manufacturing process in the case where the concept of the present invention is applied to a coping.
FIG. 4 is a perspective view when the concept of the present invention is used for a face material.
FIG. 5 is a plan view when the concept of the present invention is used for a face material.
[Explanation of symbols]
10A Molded building material (convex type)
10B Molded building material (concave)
10C molded building material (continuous surface type)
DESCRIPTION OF SYMBOLS 11 Surface part 12 Back surface part 13 Connection part 15 Convex part 16 Joining recessed part 20 Waterproof sealing material 20A Waterproof sealing material 20B Waterproof sealing material

Claims

A molded building material having a hollow structure , comprising a front surface portion and a back surface portion, a connecting portion connecting between the front surface portion and the back surface portion, and a hollow portion surrounded by the front surface portion, the back surface portion, and the connecting portion. In each of the above, it is a bonding structure of molded building materials that can be bonded to each other by providing a portion for bonding,
One molded building material has a back surface portion that protrudes in the in-plane direction with respect to the front surface portion, and a bonding convex portion that is a portion for the bonding is formed,
The other molded building material has a front surface portion that protrudes in the in-plane direction with respect to the back surface portion, and is formed with a bonding concave portion that becomes a portion for the bonding,
Between the convex part for joining and the concave part for joining, it fixes to the edge part side of the concave part for joining, and closely_contact | adheres to the back surface part in the convex part for joining, The said hollow part in said one molding building material is sealed A first waterproof sealing material to be stopped, and a first sealing member that is fixed to an end portion side of the bonding convex portion and is in close contact with the surface portion of the bonding concave portion to seal the hollow portion in the other molded building material. A joint structure for molded building materials, wherein two waterproof seal materials are arranged.

In the joint structure of the molded building material according to claim 1,
The molded building material has a rectangular planar shape, has a bonding convex portion on two adjacent sides, and has a bonding concave portion on the other two sides.

A molded building material having a hollow structure , comprising a front surface portion and a back surface portion, a connecting portion connecting between the front surface portion and the back surface portion, and a hollow portion surrounded by the front surface portion, the back surface portion, and the connecting portion. In the method of joining molded building materials that can be joined to each other by providing a part for joining,
In one molded building material, the back surface portion protrudes in the in-plane direction with respect to the front surface portion to form a bonding convex portion that becomes a portion for the bonding, and in the other molded building material, the front surface portion is the back surface portion. A building material molding procedure for projecting in the in-plane direction to form a concave part for joining which becomes a part for the joining,
It fixes to the edge part side of the said recessed part for joining, and is stuck to the back surface part in the said convex part for joining, The said hollow part in said one molding building material is sealed with a 1st waterproof sealing material, A waterproof preparation procedure for fixing to the end portion side of the convex portion and closely contacting the surface portion of the bonding concave portion, and sealing the hollow portion of the other molded building material with a second waterproof sealing material ;
A bonding method for a molded building material, comprising: a bonding procedure for bonding a molded building material by positioning a bonding convex portion and a bonding concave portion so as to sandwich each waterproof sealing material.

Molded building materials for joining and using
A front surface portion and a back surface portion, a connection portion connecting between the front surface portion and the back surface portion, and a hollow portion surrounded by the front surface portion, the back surface portion, and the connection portion, and having a hollow structure,
On one of at least two edges to be joined to other molded building materials, a convex part for joining is formed by projecting the back surface part in the in-plane direction with respect to the front surface part,
On the other edge, the front surface portion is protruded in the in-plane direction with respect to the back surface portion to form a bonding recess,
Between the convex part for joining and the concave part for joining, it fixes to the edge part side of the concave part for joining, and closely_contact | adheres to the back surface part in the convex part for joining, and seals the said hollow part in the said other molded building materials. The first waterproof sealing material to be stopped and the first waterproof sealing material fixed to the end portion side of the joining convex portion, and in close contact with the surface portion in the joining concave portion, seal the hollow portion in the other molded building material. A molded building material characterized in that 2 waterproof seal materials are arranged .

In the molded building material according to claim 4,
The molded building material is characterized in that the planar shape is rectangular, the adjacent two sides are provided with bonding convex portions, and the other two sides are provided with bonding concave portions.