【０００１】
【発明の属する技術分野】
本発明は、廻り階段に関し、詳しくは、親柱の周面への蹴込板や踏板の取付け構造に関する発明である。
【０００２】
【従来の技術】
従来から、縦柱状の親柱１の周面に、該周回方向に所定角度ずつずらし、且つ、上下段々に踏板２を取付けることで形成される廻り階段にあっては、図１４に示すように、親柱１の周面に階段状に溝２０を穿設し、この溝２０に踏板２の端縁をそれぞれ嵌め込んでいくことで施工が為されていた。しかし、この施工作業は、特に親柱１に溝２０を穿設させる作業が煩雑且つ熟練を要するものであり、廻り階段の施工の容易化が切望されていた。
【０００３】
しかして、施工容易な廻り階段を図り、図１５に示すように、逆Ｌ字型の取付金具２１を複数個、上下高さ位置をずらして適宜親柱１の周面に取り付け、この取付金具２１にそれぞれ踏板２を支持させて廻り階段を施工するものが提案されている（例えば、特許文献１参照）。
【０００４】
また、図１６に示すように、上辺に階段状の段部２２を形成した階段状板材２３を親柱１の周面に沿わせて取付け、上記階段状板材２３の段部２２に踏板２の端縁を載せて支持させ、廻り階段を施工するものが提案されている（例えば、特許文献２参照）。
【０００５】
【特許文献１】
特開平１１−１３１７３８号公報
【特許文献２】
特開２００２−１８８２６４号公報
【０００６】
【発明が解決しようとする課題】
しかしながら、図１５の廻り階段では、親柱１の周囲に溝２０を穿設する手間は省かれるものの、各取付金具２１を親柱１の所定位置にそれぞれ位置決めするのが煩雑であるから、施工の容易化は充分に図られたものではない。また、図１６の廻り階段では、親柱１の周面毎に階段状板材２３を取付ければよく、上記取付金具２１よりも設置点数を少なくして施工性を向上させているが、親柱１の周面毎での階段状板材２３の位置決め作業は変わらずに煩雑であり、これも施工の容易化は充分に図られたものではなかった。このように、施工の容易化を図って各種構造の廻り階段（たとえば、図１５、図１６の廻り階段）が提案されたが、いずれも、踏板２を支持させる取付金具２１や階段状板材２３の親柱１の周面への位置決め作業が煩雑であり、廻り階段の大幅な施工の容易化は達成されていないのが現状である。
【０００７】
本発明は上記の点に鑑みてなされたものであり、踏板を支持させる部材の親柱の周面への位置決めを容易に行い得るようにすることで、施工性を大幅に向上させた廻り階段を提供することを課題とするものである。
【０００８】
【課題を解決するための手段】
上記課題を解決するために本発明に係る廻り階段は、親柱１の周面に、該周回方向に所定角度ずつずらし、且つ、上下に蹴上げ高さ毎に踏板２を取付けることで形成される廻り階段において、踏板２を支持する支持台４を、親柱１の周回方向に所定角度ずつずらすと共に下段の支持台４に上段の支持台４を載せるようにして、親柱１の周面における所定の取付け位置に固定したことを特徴とする。これによると、最下段の支持台４の親柱１の周面への取付け位置を決めてしまえば、順に支持台４を積み上げることで各支持台４の取り付け位置が決まることになり、位置決めを容易にして親柱１の周面に各支持台４を固定することができる。つまり、従来煩雑な作業であった踏板２を支持する部材の親柱１への位置決めを伴った固定が容易に行われることから、施工良く廻り階段を形成させることができるのである。
【０００９】
また、角柱状の親柱１における周面の角部Ｃを挟んで配置される下段の支持台４と上段の支持台４とは、下段の支持台４の上面の一部及び上段の支持台４の下面４ｂの一部がそれぞれ該角部Ｃの外方位置に突出され、この角部Ｃの外方位置にある下段の支持台４の上面に上段の支持台４の下面４ｂが載置されてなることも好ましい。これによると、角柱状の親柱１の角部Ｃを挟んで配置される支持台４にあっても、位置決めを伴った固定を容易に行わせることができる。
【００１０】
また、角柱状の親柱１における一周面に配置される複数の支持台４を一体構成にしたことも好ましい。これによると、支持台４の部材点数を減らすことができ、施工の容易化に資することができる。
【００１１】
また、支持台４の上端部位を下方に凹状に切り欠くことで、支持台４の上端より１段低い水平面状の支持台載置面５を形成すると共に支持台４の上端と上記支持台載置面５とを連続させる垂直面状の支持台当接面６を形成し、下段の支持台４の支持台載置面５に載置した上段の支持台４の側端面を支持台当接面６に当接させたことも好ましい。これによると、下段の支持台４に対する上段の支持台４の位置決めを、上下方向のみならず水平方向にも決定させることができ、更に正確な位置決めを可能にできる。
【００１２】
また、支持台４に踏板２が載置される水平面状の踏板載置面７を形成すると共に支持台４の上端面４ａを水平面状に形成し、下段の支持台４の支持台当接面６上に載置した上段の支持台４の踏板載置面７と下段の支持台４の上端面４ａとを面一状態にし、この面一面上に踏板２を載置したことも好ましい。これによると、上段の支持台４に支持される踏板２は、上段の支持台４の踏板載置面７での支持に加えて、下段の支持台４の上端面４ａにも載置されて受けられるので、踏板２の支持台４への固定強度をより向上させることができる。
【００１３】
また、支持台４の左右端部に、踏板２を載置させる踏板載置面７及び、踏板２の前縁下部から垂設される蹴込板３を当接させる垂直面状の蹴込板当接面８をそれぞれ設け、この支持台４を表裏反転自在にして親柱１の周面に固定したことも好ましい。これによると、一の支持台４を表裏反転させて用いることで、左右２種の踏板載置面７及び蹴込板当接面８の使用をすることができ、つまり支持台４の汎用性を高めることができ、支持台４の少品種化を図ることができる。
【００１４】
【発明の実施の形態】
本発明は、親柱１の周面に該周回方向に所定角度ずつずれると共に上下に所定の蹴上げ高さ毎に設定される所定の取付け位置に、踏板２を支持させる支持台４を固定するのにあたり、下段の支持台４に上段の支持台４を載置させて配置することで、下段の支持台４の固定位置さえ決定できれば、上段の支持台４が自動的に所定の取付け位置に位置されるといったように、支持台４の所定位置への位置決め作業の容易化を図り得るようにした廻り階段である。以下、本発明を添付図面に示す実施形態に基づいて説明していく。
【００１５】
図１乃至図４に本発明の実施の形態の例を示す。本例の廻り階段は、図２に示すように、親柱１を周回方向に１８０°廻るうちに４段の階段が配置される、９０°・２段廻りタイプと称される廻り階段である。すなわち、正四角柱状の親柱１の周回に、該周回方向に４５°の角度ずつずらし、且つ、上下に蹴上げ高さ毎に踏板２を水平に配置し、上段の踏板２の前縁下部と下段の踏板２の上面との間に蹴込板３を垂設することで形成された廻り階段である。
【００１６】
上記のように配置される複数の踏板２は、親柱１の周面の所定位置に固定された支持台４によって支持される。この支持台４は、所定の左右幅を有し、所定の上下高さを有すると共に所定の表裏厚みを有した縦板であり、その上端面４ａ及び下面４ｂは水平面状に形成され、その下部部分における左右方向の一方（階下側）の端部には踏板２が水平に挿入されるコ字溝状の踏板挿入溝９が形成され、また、その上端部分における左右方向の他方（階上側）の角部には下方に凹状に切り欠いた切欠部１０が形成されている。なお、図中、矢印Ａ方向が階上方向であり、矢印Ｂ方向が階下方向である。
【００１７】
ここで、支持台４の上端面４ａと踏板挿入溝９の階下側の開口縁とを接続する支持台４の階下側の端面には、蹴込板３を当接させる蹴込板当接面８が形成されている。上記蹴込板当接面８は、垂直に切り立ち、且つ、支持台４の板面に対して所定角度に交差するような垂直面である。また、上記踏板挿入溝９の下面は、該踏板挿入溝９に挿入された踏板２が載置される水平面状の踏板載置面７を構成している。また、上記切欠部１０は、支持台４の上端面４ａより１段低い水平面状の支持台載置面５を形成させると共に、支持台４の上端面４ａと上記支持台載置面５とを連続させる垂直面状の支持台当接面６を形成させている。更に言うと、この支持台載置面５と支持台４の下面４ｂとの上下高さ寸法Ｈ１（図３）及び、支持台４の上端面４ａと踏板載置面７との上下高さ寸法Ｈ２（図３）は、蹴上げ高さに設定されている。
【００１８】
なお、具体的に本例の９０°・２段廻りタイプの廻り階段では、上記構成を有するも形状を違えた２種類の支持台４０，４１が用いられている。第１の支持台４１は、第２の支持台４２に比べて踏板載置面７の左右長さ寸法及び、下面４ｂの長さ寸法が長く形成されていると共に、蹴込板当接面８の該支持台４０の板面に対する角度θ１が４５°に設定されている。一方、第２の支持台４１は、第１の支持台４０に比べて踏板載置面７の左右長さ寸法及び、下面４ｂの長さ寸法が短く形成されていると共に、蹴込板当接面８の該支持台４１の板面に対する角度θ２が９０°（すなわち、直角）に設定されている。更に言えば、第１の支持台４の踏板載置面７は、蹴込板当接面８よりも階下側に突出するように形成されている。
【００１９】
支持台４は踏板２を所定箇所に配置させるために親柱１の所定位置に固定させるものであるが、上記構成を有する本例の支持台４にあっては、下段の支持台４に上段の支持台４を載せることで、親柱１の所定位置に下段から上段の順に次々と支持台４を位置させて固定を行わせているのである。詳述すると、上段の支持台４は下段の支持台４の支持台載置面５上に載せられ、これにより下段の支持台４を基準として上段の支持台４の上下方向の設置位置が決定されるようになっており、また、下段の支持台４の支持台載置面５上に載置した上段の支持台４の階下側の端面は、下段の支持台４の支持台当接面６に当接され、これにより下段の支持台４を基準として上段の支持台４の水平方向の設置位置が決定されるようになっている。このように、上段の支持台４は下段の支持台４を基準として上下方向及び水平方向の設置位置が決定されるのであり、つまり、最下段の支持台４の親柱１の周面への取付け位置を決めてしまえば、順に支持台４を積み上げていくことで、各支持台４の取り付け位置が自動的に決まるようにされているのである。
【００２０】
なお、角柱状の親柱１の角部Ｃを挟んでの支持台４同士の接続にあっても、上述したように、上段の支持台４は下段の支持台４を基準に、上下方向及び水平方向の位置決めが為されるものである。詳述すると、上段の支持台４が固定される側の親柱１の周面と下段の支持台４の支持台当接面６とを面一状にしておき、且つ、下段の支持台４の支持台載置面５を該角部Ｃの外方位置に突出させておくのである。そして、上段の支持台４の下面４ｂを下段の支持台４の支持台載置面５上に載置させ、且つ、上段の支持台４における親柱１の周面に沿う板面を下段の支持台４の支持台当接面６に当接させるのである。このようにすることで、角柱状の親柱１の角部Ｃを挟んで配置される支持台４同士にあっても、上段の支持台４は下段の支持台４を基準として上下方向及び水平方向への位置決めが為されるようにされている。
【００２１】
なお、具体的に本例の９０°・２段廻りタイプの廻り階段では、２種類の支持台４０，４１を交互に接続させて親柱１の周面の一面１ａに２種類の支持台４０，４１を各個位置させるようにし、且つ、この親柱１の周面の一面１ａにある２個の支持台４０，４１のうち、下段の支持台４を第１の支持台４０で構成させると共に、上段の支持台４を第２の支持台４１で構成させるような配列で、支持台４が親柱１の周面に固定される。
【００２２】
詳しくは、第１の支持台４０上に第２の支持台４１が載置されて、これら２個の支持台４０，４１が親柱１の周面の一面１ａに固定された状態にあっては、第１の支持台４０の支持台載置面５上に第２の支持台４１の下面４ｂが載置されることで、第２の支持台４１の上下方向の位置が第１の支持台４０を基準に決定され、また、第１の支持台４０の支持台当接面６に第２の支持台４１の階下側の端面が当接されることで、第２の支持台４１の水平方向の位置が第１の支持台４０を基準に決定されている。
【００２３】
なお、この第１の支持台４０上に第２の支持台４１が載置されて親柱１の周面の一面１ａに固定された状態にあっては、第２の支持台４１の支持台当接面６は、親柱１の該一面１ａの階上側に隣接する面（階上面１ｂと称する）に対して面一状態にされており、また、該第２の支持台４１の支持台載置面５は、親柱１の該一面１ａと階上面１ｂとの角部Ｃ１に突出されて位置されており、また、該第１の支持台４０の下面４ｂ部分は、親柱１の該一面１ａと親柱１の該一面１ａの階下側に隣接する面（階下面１ｃと称する）との角部Ｃ２に突出されて位置されている。また、親柱１の階上面１ｂ、階下面１ｃでも、上記親柱１の該一面１ａ同様、第１の支持台４０上に第２の支持台４１が載置される配列で、支持台４が親柱１に固定されるので、親柱１の該一面１ａと階上面１ｂとの角部Ｃ１、親柱１の該一面１ａと階下面１ｃとの角部Ｃ２にあっては、各角部Ｃ１，Ｃ２を挟んで、下段に第２の支持台４１が位置すると共に上段に第１の支持台４０が位置し、つまり、第２の支持台４１上に第１の支持台４０が載置されて接続されるようになる。
【００２４】
この角部Ｃを挟んでの支持台４同士の連結にあっても、上段の第１の支持台４０は、下段の第２の支持台４１を基準に、上下方向及び水平方向の位置決めが為されるのである。詳しくは、角部Ｃに突出された第１の支持台４０の下面４ｂが、同じく角部Ｃに突出された第２の支持台４１の支持台載置面５上に載置され、また、第１の支持台４０における親柱１の周面（階下面１ｃまたは階上面１ｂ）に沿う板面が、第２の支持台４１の支持台当接面６に当接されるのである。このように、親柱１の角部Ｃを挟んで配置される支持台４同士にあっても、上段の支持台４である第１の支持台４０は、下段の支持台４である第２の支持台４１を基準として、上下方向及び水平方向の位置決めが行われるようにされるのである。
【００２５】
上述したように、本例の廻り階段は、踏板２を支持する支持台４の親柱１の所定位置への取付けの際に、下段の支持台４に上段の支持台４を載置させるだけで、下段の支持台４を基準にして上段の支持台４を親柱１の所定位置に位置させることができるので、従来煩雑な作業であった踏板２を支持する部材（本発明では支持台４）の親柱１への位置決めを伴った固定が容易に行われ、廻り階段の施工性の大幅な向上が図られているのである。
【００２６】
なお、親柱１の所定位置に固定された支持台４には、踏板２が取付けられるのであるが、本例の廻り階段では踏板２の取付け強度の向上をも図られている。つまり、下段の支持台４に上段の支持台４を載置した状態では、下段の支持台４の上端面４ａと上段の支持台４の踏板載置面７とが面一状態にされており、上段の支持台４の踏板挿入溝９に挿入された踏板２が、上段の支持台４の踏板載置面７に加えて、下段の支持台４の上端面４ａにも載置されて支持されるようになっているのである。また、本例の踏板２は支持台４に載置される形で取り付けられるので、釘やネジ等の固着具を用いて踏板２を強固に支持台４、ひいては親柱１に固定できるものである。しかして本例の廻り階段は、釘等の固着具を用いての踏板２の親柱１への固定が困難であるといった欠点を有する、従来技術の項で述べた親柱１に設けた階段状の溝２０に踏板２の側端縁を嵌合する構成を有した廻り階段（図１４）と比べても、より踏板２の固定強度の向上が図られ得るものであることは言うまでもない。
【００２７】
また、形状は異なるが、図５に示すように、角柱状の親柱１の周面における一面に配置される複数の支持台４を一体構成にすることも好ましい。これによると、支持台４の部材点数を減らすことができ、施工の容易化、廻り階段の製造コストの削減に資することができるのである。なお、上端の角部に切欠部１０を形成するのに代えて、この図５の支持台４のように、支持台４の下面４ｂの角部Ｃに形成させて、支持台４間の接続の際に、上段の支持台４が、下段の支持台４を基準として、上下方向及び水平方向に位置決めが為されるようにすることもよいのは、言うまでもない。
【００２８】
以下、本発明の実施の形態の他例を列挙する。これらの例において、先の実施の形態の例の廻り階段と同様部位には、同符号を付して説明を省略し、相違する部位につき説明していく。
【００２９】
図６及び図７に示す本発明の実施の形態の他例は、支持台４を表裏反転させて用いることで支持台４の汎用性を高め、支持台４の少品種化を図り得るようにした例である。以下、詳述する。
【００３０】
本例の支持台４２は、表裏反転させて用いることができるよう、支持台４２の左右端部（階下側端部、階上側端部）にそれぞれ踏板載置面７及び蹴込板当接面８を設けて構成されている。ここでは、便宜上、支持台４２の板面の表面側を親柱１に沿わせる向きで、支持台４２の階下側にある踏板載置面７を第１の踏板載置面７ａと称し、階上側にある踏板載置面７を第２の踏板載置面７ｂと称し、また、階下側にある蹴込板当接面８を第１の蹴込板当接面８ａと称すると共に、階上側にある蹴込板当接面８を第２の蹴込板当接面８ｂと称する。
【００３１】
詳述すると、第１の踏板載置面７ａは、第２の踏板載置面７ｂよりも左右長さ寸法が長く、且つ、第１の蹴込板当接面８ａよりも階下側に突出するように形成されている。また、第１の蹴込板当接面８ａは、支持台４２の板面に対する角度θ３が４５°に設定されており、第２の蹴込板当接面８ｂは、支持台４２の板面に対する角度θ４が９０°に設定されている。また、この支持台４２の上端面４ａは、切欠部１０が形成されておらず面一の水平面状に形成されており、この上端面４ａが支持台載置面５を構成している。
【００３２】
そして、この支持台４２は、交互に表裏を違えて配列されて接続され、且つ、親柱１の周面の一面１ａに固定する２個の支持台４２，４２にあっては、下段の支持台４には支持台４２の板面の表面側を親柱１の周面の該一面１ａに沿わせた形態のものが用いられ、上段の支持台４には支持台４２の板面の裏面側を親柱１の周面の該一面１ａに沿わせる形態のものが用いられるようにされる。
【００３３】
この例における支持台４の親柱１の周面への位置決めにあっても、下段の支持台４上に上段の支持台４を載せることで行われ、つまり上段の支持台４は下段の支持台４を基準に、上下方向の位置決めが為されるようになっている。つまり、最下段の支持台４の親柱１の周面への取付け位置を決めてしまえば、順に支持台４を積み上げていくことで、各支持台４の上下方向の取り付け位置が決まるようにされているのであり、従来に比べて廻り階段の施工性の向上が図られているのである。なお、本例では、先の実施の形態の例にある支持台当接面６に相当するものは存在しなく、支持台４の水平方向の位置設定は従来同様に実測に基いて行われることとなるので、図１乃至図４の廻り階段に比べて施工性は劣るものとなっているが、代わりに、本例の廻り階段で用いる支持台４は、親柱１の周面に表裏を違えて沿わせることで２種類の支持台４として機能させており、つまり１種類の支持台４だけを用いて廻り階段の施工が行えるようにされており、したがって、支持台４の少品種化が図られ、廻り階段の製造コストの削減等の利益を受け得るようにされているのである。
【００３４】
なお、図示はしないが、支持台４２の上端面４ａの階下側及び階上側の角部に切欠部１０を形成して、支持台当接面６を形成させてもよい。これによると、上段の支持台４を下段の支持台４を基準として水平方向への位置決めをも行わせ、廻り階段の施工性の向上を図ったり、上段の支持台４の踏板挿入溝９に挿入させた踏板２を、上段の支持台４の踏板載置面７のみならず下段の支持台４の上端面４ａにも支持させ、踏板２の取付け強度の向上を図ることができるのである。
【００３５】
図８乃至図１１に示す本発明の実施の形態の他例は、親柱１を周回方向に１８０°廻るうちに６段の階段が配置される、９０°・３段廻りタイプと称される廻り階段である。すなわち、正四角柱状の親柱１の周回に、該周回方向に３０°の角度ずつずらし、且つ、上下に蹴上げ高さ毎に踏板２を水平に配置し、上段の踏板２の前縁下部と下段の踏板２の上面との間に蹴込板３を垂設することで形成された廻り階段である。この例で用いる支持台４は、基本構成は先の実施の形態の例の支持台４と同構成であるが、主に踏板２当接面の支持台４の板面への交差角度θを違えた３種類の支持台４が用いられる。以下、詳述する。
【００３６】
第１の支持台４３は、その踏板載置面７の左右長さ寸法が他の支持台４（後述する第２及び第３の支持台４３，４４）のそれに比べて長く形成されていると共に、その蹴込板当接面８の支持台４３の板面に対する角度θ５が３０°に設定されている。ここで、上記踏板載置面７は、蹴込板当接面８よりも階下側に突出するように形成されている。また、第２の支持台４４は、その蹴込板当接面８の支持台４４の板面に対する角度θ６が６０°に設定されている。また、第３の支持台４５は、その蹴込板当接面８の支持台４５の板面に対する角度θ７が９０°（すなわち、直角）に設定されている。
【００３７】
そして、これら３種離の支持台４は、先の実施の形態の例同様、下段の支持台４の支持台載置面５に上段の支持台４を載せると共に、下段の支持台４の支持台当接面６に上段の支持台４の板面や階下側の端面を当接させることで、上下方向及び水平方向の位置決めが為されるようにされている。具体的に、親柱１の周面の一面１ａには各支持台４３，４４，４５が各個固定されるのであるが、これは、第１の支持台４３を下段の支持台４として構成させ、第２の支持台４４を中段の支持台４として構成させ、第３の支持台４５を上段の支持台４として構成させるような配列で行われる。つまり、第２の支持台４４は第１の支持台４３を基準として上下方向及び水平方向の位置決めが行われており、第３の支持台４５は第２の支持台４４を基準として上下方向及び水平方向の位置決めが行われているのである。
【００３８】
ここで、親柱１の周面の一面１ａに各支持台４３，４４，４５が固定された状態では、第３の支持台４５の支持台当接面６は、親柱１の階上面１ｂに対して面一状態にされており、また、第３の支持台４５の支持台載置面５は、親柱１の該一面１ａと階上面１ｂとの角部Ｃ１に突出されて位置されており、また、第１の支持台４３の下面４ｂ部分は、親柱１の該一面１ａと階下面１ｃとの角部Ｃ２に突出されて位置されている。また、親柱１の階上面１ｂ、階下面１ｃでも、上記親柱１の該一面１ａ同様の配列で、支持台４が親柱１に固定されるので、親柱１の該一面１ａと階上面１ｂとの角部Ｃ１、親柱１の該一面１ａと階下面１ｃとの角部Ｃ２にあっては、各角部Ｃ１，Ｃ２を挟んで、下段に第３の支持台４５が位置すると共に上段に第１の支持台４３が位置し、つまり、第３の支持台４５上に第１の支持台４３が載置されて接続されるようになる。
【００３９】
この角部Ｃを挟んでの支持台４同士の連結は、詳しくは、角部Ｃに突出された第１の支持台４３の下面４ｂが、同じく角部Ｃに突出された第３の支持台４５の支持台載置面５上に載置され、また、第１の支持台４３における親柱１の周面（階下面１ｃまたは階上面１ｂ）に沿う板面が、第３の支持台４５の支持台当接面６に当接されるのであり、つまり、上段の第１の支持台４３は、下段の第３の支持台４５を基準に、上下方向及び水平方向の位置決めが為されるようにされている。
【００４０】
このように本例の回り階段も、先述した実施の形態の例同様、踏板２を支持する支持台４の親柱１への位置決めを伴った固定が容易に行われ、廻り階段の施工性の大幅な向上が図られているのである。
【００４１】
図１２及び図１３に示す本発明の実施の形態の他例は、先例同様９０°・３段廻りタイプの廻り階段であって、この廻り階段で用いる支持台４の中に表裏反転自在な支持台４を用いることで、廻り階段に使用する支持台４の少品種化を図り得るようにした例である。以下、詳述する。
【００４２】
本例は、先の図８乃至図１１の例における第２，第３の支持台４４，４５を兼用としたものである。この兼用される支持台４は、図６及び図７の例の支持台４同様に、支持台４の左右端部（階下側端部、階上側端部）にそれぞれ踏板載置面７及び蹴込板当接面８を設けて構成されている。ここでは、便宜上、兼用される支持台４を兼用支持台４６と称し、この兼用支持台４６の板面の表面側を親柱１の周面に沿わせる向きで、兼用支持台４６の階下側にある踏板載置面７を第１の踏板載置面７ａと称し、階上側にある踏板載置面７を第２の踏板載置面７ｂと称し、また、階下側にある蹴込板当接面８を第１の蹴込板当接面８ａと称すると共に、階上側にある蹴込板当接面８を第２の蹴込板当接面８ｂと称する。詳しくは、第１の蹴込板当接面８ａは支持台４の板面に対する角度θ８が６０°に設定されており、第２の蹴込板当接面８ｂは支持台４の板面に対する角度θ９が９０°に設定されている。
【００４３】
そして、支持台４を親柱１の所定位置に固定するには、先の図８乃至図１１の例の第２の支持台４４に代えて、板面の表面側を親柱１の周面に沿わせる形で１つ目の兼用支持台４６を配置し、第３の支持台４５に代えて、板面の裏面側を親柱１の周面に沿わせる形で２つ目の兼用支持台４６を配置するようにされる。このように、廻り階段に用いる支持台４の一部を兼用支持台４６で構成することで、支持台４の少品種化が図られ、廻り階段の製造コストの削減等の利益を受け得るようにできるのである。
【００４４】
なお、上記には、９０°・２段廻り、９０°・３段廻りの廻り階段の例を示したが、蹴込板当接面８の支持台４の板面に対する角度を変えることで、支持台４の様々な９０°・複数段廻りの階段にも対応させることができると共に、支持台４の兼用も同様に図ることもできる。つまり、本発明の技術思想は各種廻り階段にも適用させることができるのは言うまでもないのである。
【００４５】
【発明の効果】
上記のように本発明の請求項１記載の発明にあっては、踏板を支持する支持台を、親柱の周回方向に所定角度ずつずらすと共に下段の支持台に上段の支持台を載せるようにして、親柱の周面における所定の取付け位置に固定したので、最下段の支持台の親柱の周面への取付け位置を決めてしまえば、順に支持台を積み上げることで各支持台の取り付け位置が決まることになり、つまり、位置決めを容易にして親柱の周面に各支持台を固定することができる。この踏板を支持する部材（支持台）の親柱への位置決め作業は、従来煩雑な作業であって廻り階段の施工を煩雑にする主因とされていたが、上述したように本発明では、踏板を支持する支持台の親柱への位置決めを伴った固定が容易に行われることから、廻り階段の施工性を大幅に向上させることができるようにされているのである。
【００４６】
また、請求項２記載の発明にあっては、角柱状の親柱における周面の角部を挟んで配置される下段の支持台と上段の支持台とは、下段の支持台の上面の一部及び上段の支持台の下面の一部がそれぞれ該角部の外方位置に突出され、この角部の外方位置にある下段の支持台の上面に上段の支持台の下面が載置されてなるので、親柱の角部を挟んで配置される支持台も位置決めを伴った固定が容易に行われ、請求項１の効果である支持台の親柱への位置決めを伴った固定の容易化を確保することができるのである。
【００４７】
また、請求項３記載の発明にあっては、請求項１の効果に加え、角柱状の親柱における一周面に配置される複数の支持台を一体構成にしたので、支持台の部材点数を減らすことができ、施工の容易化の向上を図ることができるのである。
【００４８】
また、請求項４記載の発明にあっては、請求項１の効果に加え、支持台の上端部位を下方に凹状に切り欠くことで、支持台の上端より１段低い水平面状の支持台載置面を形成すると共に支持台の上端と上記支持台載置面とを連続させる垂直面状の支持台当接面を形成し、下段の支持台の支持台載置面に載置した上段の支持台の側端面を支持台当接面に当接させたので、下段の支持台に対する上段の支持台の位置決めを、上下方向のみならず水平方向にも決定させることができ、更に正確且つ容易に、支持台を親柱の取付け位置に位置させることができるのである。
【００４９】
また、請求項５記載の発明にあっては、請求項４の効果に加え、支持台に踏板が載置される水平面状の踏板載置面を形成すると共に支持台の上端面を水平面状に形成し、下段の支持台の支持台当接面上に載置した上段の支持台の踏板載置面と下段の支持台の上端面とを面一状態にし、この面一面上に踏板を載置したので、上段の支持台に支持される踏板は、上段の支持台の踏板載置面での支持に加えて、下段の支持台の上端面にも載置されて受けられ、踏板の支持台、ひいては親柱への固定強度をより向上させることができるのである。
【００５０】
また、請求項６記載の発明にあっては、請求項１の効果に加え、支持台の左右端部に、踏板を載置させる踏板載置面及び、踏板の前縁下部から垂設される蹴込板を当接させる垂直面状の蹴込板当接面をそれぞれ設け、この支持台を表裏反転自在にして親柱の周面に固定したので、この支持台を表裏反転させて用いることで、左右２種の踏板載置面及び蹴込板当接面の使用をすることができ、つまり支持台の汎用性を高め、支持台の少品種化を図って、廻り階段の製造コストの低減化を図ることができる。
【図面の簡単な説明】
【図１】本発明の実施の形態の例の斜視図である。
【図２】同上の平面図である。
【図３】同上の支持台の配列を説明する説明図である。
【図４】同上の支持台の親柱への固定状態を示す斜視図である。
【図５】本発明の実施の形態の他例を説明する説明図である。
【図６】本発明の実施の形態の更に他例における支持台の表裏反転を説明する説明図である。
【図７】同上の支持台の親柱への固定状態を示す斜視図である。
【図８】本発明の実施の形態の更に他例の斜視図である。
【図９】同上の平面図である。
【図１０】同上の支持台の配列を説明する説明図である。
【図１１】同上の支持台の親柱への固定状態を示す斜視図である。
【図１２】本発明の実施の形態の更に他例における兼用支持台の表裏反転を説明する説明図である。
【図１３】同上の支持台の親柱への固定状態を示す斜視図である。
【図１４】従来技術の例を示す斜視図である。
【図１５】従来技術の他例を示す斜視図である。
【図１６】従来技術の更に他例を示す斜視図である。
【符号の説明】
１ 親柱
１ａ 一面
１ｂ 階上面
１ｃ 階下面
２ 踏板
３ 蹴込板
４ 支持台
５ 支持台載置面
６ 支持台当接面
７ 踏板載置面
８ 蹴込板当接面
９ 踏板挿入溝
１０ 切欠部
Ａ 階上方向
Ｂ 階下方向
Ｃ 角部[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning staircase, and more particularly, to an installation structure of a riser or a tread on a peripheral surface of a main pillar.
[0002]
[Prior art]
Conventionally, as shown in FIG. 14, a turning staircase formed by attaching a tread plate 2 to the peripheral surface of a vertical pillar-shaped main pillar 1 by a predetermined angle in the circumferential direction and attaching the tread plate 2 to the upper and lower steps is used. A groove 20 is formed in the peripheral surface of the main pillar 1 in a stepwise manner, and the edge of the tread plate 2 is fitted into the groove 20 to perform the construction. However, in this construction work, in particular, the work of perforating the groove 20 in the main pillar 1 is complicated and requires skill, and there has been a long-awaited desire to facilitate the construction of the surrounding stairs.
[0003]
Then, a round staircase for easy construction is planned, and as shown in FIG. 15, a plurality of inverted L-shaped mounting brackets 21 are appropriately mounted on the peripheral surface of the main pillar 1 by shifting the vertical height position, and There has been proposed a construction in which a staircase is constructed by supporting the treads 2 on the respective stairs 21 (for example, see Patent Document 1).
[0004]
As shown in FIG. 16, a step-like plate member 23 having a step-like step portion 22 formed on the upper side is attached along the peripheral surface of the main pillar 1, and the step plate 2 of the tread plate 2 is attached to the step portion 22 of the step-like plate member 23. There has been proposed a method in which an edge is placed and supported, and a round staircase is constructed (for example, see Patent Document 2).
[0005]
[Patent Document 1]
JP-A-11-131736
[Patent Document 2]
JP 2002-188264 A
[0006]
[Problems to be solved by the invention]
However, in the round staircase of FIG. 15, although it is not necessary to form the groove 20 around the main pillar 1, it is complicated to position each of the mounting brackets 21 at a predetermined position of the main pillar 1. Is not sufficiently achieved. Further, in the turning staircase of FIG. 16, the stepped plate member 23 may be attached to each peripheral surface of the main pillar 1, and the number of installation points is smaller than that of the mounting bracket 21 to improve workability. The operation of positioning the step-like plate member 23 on each of the peripheral surfaces is not complicated and is complicated, and the simplification of the construction has not been sufficiently achieved. As described above, the running stairs of various structures (for example, the running stairs in FIGS. 15 and 16) have been proposed in order to facilitate the construction, but in each case, the mounting bracket 21 and the stair-like plate material 23 for supporting the tread plate 2 are provided. In the present situation, the positioning work on the peripheral surface of the main pillar 1 is complicated, and the construction of the surrounding stairs has not been greatly facilitated at present.
[0007]
The present invention has been made in view of the above points, and enables a member for supporting a tread plate to be easily positioned on a peripheral surface of a main pillar, thereby significantly improving workability. It is an object to provide
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a turning staircase according to the present invention is formed by displacing the peripheral surface of the main pillar 1 by a predetermined angle in the circling direction, and attaching the tread plate 2 up and down at every rising height. In the surrounding stairs, the support 4 supporting the tread plate 2 is shifted by a predetermined angle in the circumferential direction of the main pillar 1 and the upper support 4 is placed on the lower support 4 so that the upper support 4 is placed on the peripheral surface of the main pillar 1. It is characterized by being fixed at a predetermined mounting position. According to this, once the mounting position of the lowermost support 4 on the peripheral surface of the master pillar 1 is determined, the mounting position of each support 4 is determined by stacking the supports 4 in order, and positioning is performed. Each support 4 can be fixed to the peripheral surface of the main pillar 1 easily. That is, since the fixing of the member supporting the tread plate 2 with the positioning to the main pillar 1, which has conventionally been a complicated operation, is easily performed, the round staircase can be formed with good workability.
[0009]
In addition, the lower support 4 and the upper support 4 that are disposed with the corner C of the peripheral surface of the prismatic main pillar 1 interposed therebetween include a part of the upper surface of the lower support 4 and the upper support. A part of the lower surface 4b of the upper support 4 is protruded to a position outside the corner C, and the lower surface 4b of the upper support 4 is placed on the upper surface of the lower support 4 outside the corner C. It is also preferred that it be done. According to this, even with the support base 4 arranged so as to sandwich the corner C of the prismatic main column 1, it is possible to easily perform fixing with positioning.
[0010]
In addition, it is also preferable that a plurality of support bases 4 arranged on one circumferential surface of the prismatic main column 1 are integrally formed. According to this, the number of members of the support 4 can be reduced, which can contribute to facilitation of construction.
[0011]
The upper end portion of the support base 4 is notched downward to form a horizontal support base mounting surface 5 that is one step lower than the upper end of the support base 4, and the upper end of the support base 4 and the support base mount A vertical support table contact surface 6 is formed so as to be continuous with the mounting surface 5, and the side end surface of the upper support table 4 placed on the support table mounting surface 5 of the lower support table 4 is brought into contact with the support table. It is also preferable to make contact with the surface 6. According to this, the positioning of the upper support 4 with respect to the lower support 4 can be determined not only in the vertical direction but also in the horizontal direction, and more accurate positioning can be achieved.
[0012]
Further, a horizontal tread plate mounting surface 7 on which the tread plate 2 is mounted is formed on the support table 4, and an upper end surface 4a of the support table 4 is formed in a horizontal plane, and the support table contact surface of the lower support table 4 is formed. It is also preferable that the tread plate mounting surface 7 of the upper support 4 placed on the upper surface 6 and the upper end surface 4a of the lower support 4 are flush with each other, and the tread 2 is placed on the entire surface. According to this, the tread 2 supported by the upper support 4 is placed on the upper end surface 4a of the lower support 4 in addition to being supported by the tread placement surface 7 of the upper support 4. As a result, the fixing strength of the tread 2 to the support 4 can be further improved.
[0013]
Also, the right and left ends of the support base 4 are in contact with a tread plate placing surface 7 on which the tread plate 2 is placed and a vertical plate-like kick plate abutment with a kick plate 3 which is suspended from the lower front edge of the tread plate 2. It is also preferable that surfaces 8 are provided, and the support 4 is fixed to the peripheral surface of the main pillar 1 such that the support 4 can be turned upside down. According to this, by using one support table 4 upside down, it is possible to use two types of left and right treadboard mounting surfaces 7 and riser plate contact surfaces 8, which means that the versatility of the support table 4 is improved. Therefore, the number of types of the support base 4 can be reduced.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
According to the present invention, the support base 4 for supporting the tread plate 2 is fixed at a predetermined mounting position which is shifted by a predetermined angle in the circumferential direction on the peripheral surface of the master pillar 1 and is set up and down at every predetermined kick-up height. In this case, by placing the upper support 4 on the lower support 4, if the fixed position of the lower support 4 can be determined, the upper support 4 is automatically positioned at the predetermined mounting position. It is a turning staircase that can facilitate the work of positioning the support base 4 at a predetermined position. Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.
[0015]
1 to 4 show an example of an embodiment of the present invention. As shown in FIG. 2, the turning staircase of this example is a turning staircase called a 90 ° / two-turn type in which four stairs are arranged while turning the main pillar 1 by 180 ° in the circumferential direction. . That is, the step board 2 is shifted horizontally by 45 ° in the circumferential direction around the square pillar-shaped master pillar 1, and the tread boards 2 are horizontally arranged at every rising height, and the lower part of the front edge of the upper tread board 2 This is a turning staircase formed by hanging a riser 3 between the upper surface of the lower tread 2 and the upper surface.
[0016]
The plurality of treads 2 arranged as described above are supported by the support 4 fixed at a predetermined position on the peripheral surface of the main pillar 1. The support base 4 is a vertical plate having a predetermined lateral width, a predetermined vertical height, and a predetermined front and back thickness. The upper end surface 4a and the lower surface 4b are formed in a horizontal plane, and At one end in the left-right direction (downstairs side) of the portion, a U-shaped groove-shaped tread insertion groove 9 into which the tread 2 is inserted horizontally is formed, and the other upper end portion in the left-right direction (upper floor). Is formed with a notch 10 which is cut out concavely downward. In addition, in the figure, the direction of arrow A is the upstairs direction, and the direction of arrow B is the downstairs direction.
[0017]
Here, on the lower end face of the support 4 connecting the upper end face 4a of the support 4 and the lower opening edge of the tread insertion groove 9, a riser contact surface 8 for bringing the riser 3 into contact is provided. Is formed. The riser plate contact surface 8 is a vertical surface which is vertically cut and intersects the plate surface of the support 4 at a predetermined angle. The lower surface of the tread insertion groove 9 constitutes a horizontal tread placement surface 7 on which the tread 2 inserted in the tread insertion groove 9 is placed. The notch 10 forms a horizontal support table mounting surface 5 that is one step lower than the upper end surface 4a of the support table 4, and connects the upper end surface 4 a of the support table 4 with the support table mounting surface 5. A continuous vertical support base contact surface 6 is formed. More specifically, a vertical height H between the support table mounting surface 5 and the lower surface 4b of the support table 4 is set. 1 (FIG. 3) and the vertical height H between the upper end surface 4a of the support 4 and the tread placing surface 7 2 (FIG. 3) is set to the rise height.
[0018]
Note that, specifically, two types of support bases 40 and 41 having the above-described configuration but having different shapes are used in the 90 ° / 2-stage type turning staircase of this example. The first support base 41 is formed such that the left-right length of the tread plate mounting surface 7 and the length of the lower surface 4 b are longer than the second support base 42, and the first support base 41 has a lower surface of the riser plate contact surface 8. Angle θ of the support base 40 with respect to the plate surface 1 Is set to 45 °. On the other hand, the second support table 41 is formed such that the left and right lengths of the tread plate mounting surface 7 and the length of the lower surface 4b are shorter than the first support table 40, and the riser plate contact surface. 8 with respect to the plate surface of the support table 41 2 Is set to 90 ° (ie, a right angle). More specifically, the tread plate mounting surface 7 of the first support base 4 is formed so as to protrude further downstairs than the riser plate contact surface 8.
[0019]
The support 4 fixes the tread plate 2 at a predetermined position of the main pillar 1 in order to arrange the tread 2 at a predetermined position. In the support 4 of the present example having the above-described configuration, the upper support 4 is attached to the lower support 4. By mounting the support 4, the support 4 is sequentially positioned at a predetermined position of the master pillar 1 from the lower stage to the upper stage and fixed. More specifically, the upper support 4 is mounted on the support mounting surface 5 of the lower support 4, whereby the vertical mounting position of the upper support 4 is determined based on the lower support 4. The lower end face of the upper support table 4 placed on the support table mounting surface 5 of the lower support table 4 is a support table contact surface of the lower support table 4. 6 so that the horizontal support position of the upper support 4 is determined based on the lower support 4. In this way, the upper support 4 has its vertical and horizontal installation positions determined on the basis of the lower support 4, that is, the lower support 4 is positioned on the peripheral surface of the main pillar 1. Once the mounting positions are determined, the mounting positions of the respective support bases 4 are automatically determined by stacking the support bases 4 in order.
[0020]
In addition, even when the support bases 4 are connected to each other across the corner C of the prismatic main pillar 1, as described above, the upper support base 4 is vertically and Horizontal positioning is performed. More specifically, the peripheral surface of the main pillar 1 on the side to which the upper support 4 is fixed and the support abutment surface 6 of the lower support 4 are flush with each other, and the lower support 4 is fixed. The support table mounting surface 5 is projected to a position outside the corner C. Then, the lower surface 4b of the upper support 4 is placed on the support mounting surface 5 of the lower support 4, and the plate surface of the upper support 4 along the peripheral surface of the main pillar 1 is connected to the lower support. That is, the support table 4 is brought into contact with the support table contact surface 6. In this way, even if the support bases 4 are arranged with the corner C of the prismatic main pillar 1 interposed therebetween, the upper support base 4 is vertically and horizontally aligned with the lower support base 4 as a reference. The positioning in the direction is performed.
[0021]
Note that, specifically, in the rotating staircase of the 90 ° / two-stage type of the present example, two types of support bases 40 and 41 are alternately connected, and two types of support bases 40 are provided on one surface 1a of the peripheral surface of the main pillar 1. , 41 are positioned individually, and the lower support 4 of the two supports 40, 41 on one surface 1 a of the peripheral surface of the main pillar 1 is constituted by the first support 40. The support 4 is fixed to the peripheral surface of the main pillar 1 in such an arrangement that the upper support 4 is constituted by the second support 41.
[0022]
Specifically, the second support table 41 is placed on the first support table 40, and the two support tables 40, 41 are fixed to one surface 1 a of the peripheral surface of the main pillar 1. Is that the lower surface 4b of the second support table 41 is mounted on the support table mounting surface 5 of the first support table 40, so that the vertical position of the second support table 41 is the first support position. The base 40 is determined as a reference, and the lower support end surface of the second support base 41 is brought into contact with the support base contact surface 6 of the first support base 40, so that the second support base 41 The position in the horizontal direction is determined based on the first support 40.
[0023]
When the second support table 41 is placed on the first support table 40 and is fixed to one surface 1a of the peripheral surface of the main pillar 1, the support table of the second support table 41 is used. The contact surface 6 is flush with a surface (referred to as a floor upper surface 1 b) adjacent to the upper surface of the one surface 1 a of the main pillar 1, and the support table of the second support table 41. The mounting surface 5 is a corner C between the one surface 1a of the main pillar 1 and the floor upper surface 1b. 1 The lower surface 4b of the first support base 40 is adjacent to the lower surface 4c of the main surface 1a of the main pillar 1 and the lower surface of the main surface 1a of the main surface 1a. Corner C with 2 It is located protruding. Also on the floor upper surface 1b and floor lower surface 1c of the main pillar 1, similarly to the one surface 1a of the main pillar 1, the support bases 4 are arranged such that the second support base 41 is placed on the first support base 40. Is fixed to the main pillar 1, so that the corner C between the one surface 1 a of the main pillar 1 and the floor upper surface 1 b is formed. 1 Corner C between the one surface 1a of the main pillar 1 and the lower surface 1c of the floor 2 In each corner C 1 , C 2 , The second support table 41 is located at the lower level and the first support table 40 is positioned at the upper level, that is, the first support table 40 is placed on the second support table 41 and connected. Will be done.
[0024]
Even when the supports 4 are connected to each other with the corner C interposed therebetween, the first support 40 in the upper stage can be positioned vertically and horizontally with reference to the second support 41 in the lower stage. It is done. Specifically, the lower surface 4b of the first support table 40 protruding from the corner C is placed on the support table mounting surface 5 of the second support table 41 also protruding from the corner C, and The plate surface along the peripheral surface (floor lower surface 1c or floor upper surface 1b) of the main pillar 1 in the first support base 40 is in contact with the support base contact surface 6 of the second support base 41. As described above, even if the support bases 4 are arranged with the corner C of the main pillar 1 interposed therebetween, the first support base 40 which is the upper support base 4 is the second support base which is the lower support base 4. The positioning in the vertical and horizontal directions is performed with reference to the support table 41.
[0025]
As described above, the turning staircase of this example only requires the upper support 4 to be placed on the lower support 4 when the support 4 supporting the tread plate 2 is attached to the predetermined position of the main pillar 1. Thus, the upper support 4 can be positioned at a predetermined position of the main pillar 1 with reference to the lower support 4, so that the member for supporting the tread plate 2, which has conventionally been a complicated operation (the support in the present invention) 4) The fixing with the positioning to the main pillar 1 is easily performed, and the workability of the surrounding stairs is greatly improved.
[0026]
The tread plate 2 is attached to the support 4 fixed to a predetermined position of the main pillar 1, and the mounting strength of the tread plate 2 is also improved in the round staircase of this example. That is, when the upper support 4 is placed on the lower support 4, the upper end surface 4 a of the lower support 4 and the tread plate mounting surface 7 of the upper support 4 are flush with each other. The tread 2 inserted into the tread insertion groove 9 of the upper support 4 is placed and supported on the upper end surface 4a of the lower support 4 in addition to the tread placement surface 7 of the upper support 4. It is to be done. In addition, since the tread 2 of this example is mounted so as to be placed on the support 4, the tread 2 can be firmly fixed to the support 4, and thus the main pole 1, using a fixing tool such as a nail or a screw. is there. However, the round staircase of this example has a disadvantage that it is difficult to fix the tread plate 2 to the main pillar 1 using a fixing tool such as a nail, and the stair provided on the main pillar 1 described in the section of the prior art. Needless to say, the fixing strength of the tread plate 2 can be further improved as compared with a turning staircase (FIG. 14) having a configuration in which the side edge of the tread plate 2 is fitted into the groove 20 having a rectangular shape.
[0027]
In addition, although different in shape, as shown in FIG. 5, it is preferable that a plurality of support bases 4 arranged on one surface of the peripheral surface of the prismatic main column 1 be integrated. According to this, the number of members of the support base 4 can be reduced, which can contribute to simplification of the construction and reduction of the manufacturing cost of the surrounding stairs. It should be noted that instead of forming the cutouts 10 in the upper corners, instead of forming the cutouts 10 in the corners C of the lower surface 4b of the support 4 as shown in FIG. In this case, it goes without saying that the upper support 4 may be positioned vertically and horizontally with respect to the lower support 4.
[0028]
Hereinafter, other examples of the embodiment of the present invention will be listed. In these examples, the same parts as those of the previous embodiment are denoted by the same reference numerals, description thereof will be omitted, and different parts will be described.
[0029]
Another example of the embodiment of the present invention shown in FIGS. 6 and 7 is to increase the versatility of the support base 4 by using the support base 4 inverted and to reduce the variety of the support base 4. This is an example. The details will be described below.
[0030]
The support table 42 of the present example is provided on the left and right ends (downstairs side end, upper floor end) of the support base 42 so as to be used upside down. Is provided. Here, for convenience, the tread plate placing surface 7 on the lower floor side of the support plate 42 is referred to as a first tread plate placing surface 7a in a direction in which the surface side of the plate surface of the support plate 42 is along the master pillar 1, and The tread placement surface 7 on the upper side is referred to as a second tread placement surface 7b, the riser contact surface 8 on the lower floor is referred to as a first riser contact surface 8a, and the upper surface is located on the upper floor. The riser plate contact surface 8 is referred to as a second riser plate contact surface 8b.
[0031]
More specifically, the first tread placement surface 7a is longer than the second tread placement surface 7b in the left-right direction, and protrudes further downstairs than the first riser contact surface 8a. Is formed. Further, the first riser plate contact surface 8a is formed at an angle θ with respect to the plate surface of the support base 42. 3 Is set to 45 °, and the second riser plate contact surface 8b is formed at an angle θ with respect to the plate surface of the support base 42. 4 Is set to 90 °. Further, the upper end surface 4a of the support base 42 is formed in the same horizontal plane without the notch portion 10, and the upper end surface 4a forms the support base mounting surface 5.
[0032]
The support bases 42 are alternately arranged so that the front and back sides are arranged differently and connected to each other, and the two support bases 42, 42 fixed to one surface 1a of the peripheral surface of the main pillar 1 have lower support bases. The base 4 has a configuration in which the surface side of the plate surface of the support base 42 is aligned with the one surface 1a of the peripheral surface of the master pillar 1. The upper support base 4 has a back surface of the plate surface of the support base 42. A configuration in which the side is along the one surface 1a of the peripheral surface of the main pillar 1 is used.
[0033]
The positioning of the support 4 in the peripheral surface of the main pillar 1 in this example is performed by placing the upper support 4 on the lower support 4, that is, the upper support 4 is supported by the lower support 4. The positioning in the up-down direction is performed based on the table 4. That is, once the mounting position of the lowermost support 4 on the peripheral surface of the main pillar 1 is determined, the support 4 is sequentially stacked to determine the mounting position of each support 4 in the vertical direction. Therefore, the workability of the turning stairs is improved as compared with the related art. Note that, in this example, there is no equivalent to the support base contact surface 6 in the example of the previous embodiment, and the horizontal position setting of the support base 4 is performed based on actual measurement as in the related art. Therefore, the workability is inferior to the turning stairs of FIGS. 1 to 4, but the support 4 used in the turning stairs of this example is instead The two types of support bases 4 function as different types of support bases, that is, only one type of support base 4 can be used to carry out round staircase construction. Therefore, benefits such as a reduction in the manufacturing cost of the surrounding stairs can be obtained.
[0034]
Although not shown, the support base contact surface 6 may be formed by forming the cutouts 10 at the lower and upper corners of the upper end surface 4a of the support base 42. According to this, the upper support 4 is also positioned in the horizontal direction with reference to the lower support 4 to improve the workability of the surrounding stairs, and to the tread insertion groove 9 of the upper support 4. The inserted tread 2 is supported not only on the tread placement surface 7 of the upper support 4 but also on the upper end surface 4a of the lower support 4 so that the mounting strength of the tread 2 can be improved.
[0035]
Another example of the embodiment of the present invention shown in FIGS. 8 to 11 is referred to as a 90 ° / 3-turn type in which six steps are arranged while turning the main pillar 1 by 180 ° in the circumferential direction. It is a round staircase. That is, the stepping board 2 is shifted horizontally by 30 ° in the circumferential direction around the square pillar-shaped master pillar 1, and the treadboards 2 are horizontally arranged at every rising height, and the lower part of the front edge of the upper treading board 2 This is a turning staircase formed by hanging a riser 3 between the upper surface of the lower tread 2 and the upper surface. The support 4 used in this example has the same basic configuration as the support 4 of the example of the previous embodiment, but mainly determines the intersection angle θ between the contact surface of the tread 2 and the surface of the support 4. Three different types of support tables 4 are used. The details will be described below.
[0036]
The left and right lengths of the tread plate mounting surface 7 of the first support base 43 are formed longer than those of the other support bases 4 (second and third support bases 43 and 44 described later). The angle θ of the riser plate contact surface 8 with respect to the plate surface of the support 43. 5 Is set to 30 °. Here, the step board mounting surface 7 is formed so as to protrude further downstairs than the riser plate contact surface 8. In addition, the second support base 44 has an angle θ of the riser plate contact surface 8 with respect to the plate surface of the support base 44. 6 Is set to 60 °. In addition, the third support table 45 has an angle θ between the riser plate contact surface 8 and the plate surface of the support table 45. 7 Is set to 90 ° (ie, a right angle).
[0037]
These three types of support bases 4 support the upper support base 4 on the support base mounting surface 5 of the lower support base 4 and support the lower support base 4 as in the example of the previous embodiment. The vertical and horizontal positioning is performed by bringing the plate surface of the upper support base 4 or the end face on the lower floor into contact with the base contact surface 6. Specifically, each of the support bases 43, 44, 45 is fixed to one surface 1a of the peripheral surface of the main pillar 1, and this is achieved by configuring the first support base 43 as the lower support base 4. , The second support 44 is configured as the middle support 4, and the third support 45 is configured as the upper support 4. That is, the second support 44 is positioned vertically and horizontally with reference to the first support 43, and the third support 45 is positioned vertically with respect to the second support 44. The positioning in the horizontal direction is performed.
[0038]
Here, in a state where the support bases 43, 44, 45 are fixed to one surface 1 a of the peripheral surface of the main pole 1, the support base contact surface 6 of the third support base 45 becomes the floor top surface 1 b of the main pole 1. And the support table mounting surface 5 of the third support table 45 has a corner C between the one surface 1a of the main pillar 1 and the floor upper surface 1b. 1 The lower surface 4b of the first support base 43 has a corner C between the one surface 1a of the main pillar 1 and the lower surface 1c. 2 It is located protruding. Also, on the floor upper surface 1b and the floor lower surface 1c of the main pillar 1, the support base 4 is fixed to the main pillar 1 in the same arrangement as the one surface 1a of the main pillar 1, so that the one surface 1a of the main pillar 1 is Corner C with upper surface 1b 1 Corner C between the one surface 1a of the main pillar 1 and the lower surface 1c of the floor 2 In each corner C 1 , C 2 , The third support 45 is located at the lower level and the first support 43 is located at the upper level, that is, the first support 43 is placed on the third support 45 and connected. Will be done.
[0039]
The connection between the support bases 4 with the corner C interposed therebetween is described in more detail below. The lower surface 4b of the first support base 43 protruding from the corner C is the third support base also protruding from the corner C. The plate surface of the first support base 43 along the peripheral surface (floor bottom surface 1c or floor upper surface 1b) of the first support base 43 is placed on the third support base 45. In other words, the upper first support base 43 is positioned in the vertical and horizontal directions with reference to the lower third support base 45. It has been like that.
[0040]
Thus, also in the turning staircase of this example, similarly to the example of the above-described embodiment, the fixing with the positioning of the support 4 supporting the tread plate 2 to the main pillar 1 is easily performed, and the workability of the turning staircase is improved. Significant improvements are being made.
[0041]
Another example of the embodiment of the present invention shown in FIGS. 12 and 13 is a rotating staircase of a 90 ° / 3-turn type as in the previous example, and a support 4 which can be turned upside down inside a support 4 used in the turning staircase. This is an example in which the use of the platform 4 allows the support platform 4 used for the surrounding stairs to be reduced in variety. The details will be described below.
[0042]
In this example, the second and third support bases 44 and 45 in the examples of FIGS. 8 to 11 are also used. The support table 4 which is also used as the support table 4 in the example of FIGS. 6 and 7 is provided on the left and right ends (downstairs end, upper floor end) of the support table 4 with the tread plate mounting surface 7 and the riser, respectively. The plate contact surface 8 is provided. Here, for the sake of convenience, the shared support 4 is referred to as a shared support 46, and the surface side of the plate surface of the shared support 46 is oriented along the peripheral surface of the main pillar 1, and the floor below the shared support 46. Is referred to as a first tread placing surface 7a, a tread placing surface 7 on the upper floor is referred to as a second tread placing surface 7b, and a riser contact is provided on the lower floor. The surface 8 is referred to as a first riser contact surface 8a, and the riser contact surface 8 on the upper floor is referred to as a second riser contact surface 8b. Specifically, the first riser plate contact surface 8a is at an angle θ with respect to the plate surface of the support base 4. 8 Is set to 60 °, and the second riser plate contact surface 8b has an angle θ with respect to the plate surface of the support 4. 9 Is set to 90 °.
[0043]
Then, in order to fix the support 4 at a predetermined position of the main pillar 1, instead of the second support 44 in the example of FIGS. The first dual-purpose support 46 is arranged in such a manner that the second dual-purpose support is arranged along the peripheral surface of the main pillar 1 in place of the third support 45. The table 46 is arranged. In this way, by configuring a part of the support base 4 used for the round stairs with the dual-purpose support base 46, the variety of the support base 4 can be reduced, and benefits such as a reduction in the manufacturing cost of the round stairs can be obtained. You can do it.
[0044]
In the above description, the example of the turning steps of 90 ° / 2 steps and 90 ° / 3 steps is shown. However, by changing the angle of the riser contact surface 8 with respect to the plate surface of the support 4, the supporting step is performed. It is possible to cope with various steps of 90 ° and a plurality of steps of the table 4, and the support table 4 can be used in the same manner. That is, it is needless to say that the technical idea of the present invention can be applied to various round stairs.
[0045]
【The invention's effect】
As described above, in the invention according to claim 1 of the present invention, the support for supporting the tread plate is shifted by a predetermined angle in the circumferential direction of the main pillar, and the upper support is mounted on the lower support. After fixing the mounting position of the lowermost support to the peripheral surface of the main pillar, the support is mounted in order by mounting the support in order. The position is determined, that is, the positioning can be facilitated and each support can be fixed to the peripheral surface of the master pillar. The operation of positioning the member (supporting stand) for supporting the tread plate on the main pillar is conventionally a complicated operation, and has been a main factor for complicating the construction of the round stairs. However, as described above, in the present invention, the tread plate is not used. Since the fixing with the positioning of the support base for supporting the pedestal to the main pillar is easily performed, the workability of the turning stairs can be greatly improved.
[0046]
Further, in the invention according to claim 2, the lower support stand and the upper support stand which are arranged with the corner of the peripheral surface of the prismatic main pillar interposed between the upper support stand and the lower support stand A part of the lower surface of the upper and lower supports is protruded to the outside of the corner, and the lower surface of the upper support is placed on the upper surface of the lower support located outside the corner. Therefore, the support pedestal disposed across the corner of the main pillar can be easily fixed with positioning, and the effect of the first aspect can be easily fixed with the positioning of the support pedestal to the main pole. Can be secured.
[0047]
According to the third aspect of the present invention, in addition to the effect of the first aspect, since a plurality of support bases arranged on one circumferential surface of the prismatic main pillar are integrally formed, the number of members of the support base is reduced. Therefore, it is possible to reduce the number of times and to improve the ease of construction.
[0048]
According to the fourth aspect of the present invention, in addition to the effect of the first aspect, the upper end portion of the support base is notched downward so as to be concave, so that a horizontal support base mounted one step lower than the upper end of the support base. Forming a mounting surface and forming a vertical support contact surface that connects the upper end of the support table and the support table mounting surface, and the upper stage mounted on the support table mounting surface of the lower support table Since the side end surface of the support is in contact with the support abutment surface, the positioning of the upper support with respect to the lower support can be determined not only in the vertical direction but also in the horizontal direction, which is more accurate and easier. In addition, the support base can be located at the mounting position of the main pillar.
[0049]
According to the fifth aspect of the invention, in addition to the effect of the fourth aspect, in addition to forming a horizontal tread plate mounting surface on which the tread is mounted on the support, the upper end surface of the support is formed in a horizontal plane. The upper and lower supports are placed on the support platform contact surface of the lower support platform, and the upper support surface and the upper support surface of the lower support platform are flush with each other. Since the treads supported by the upper support stand are not only supported on the tread placement surface of the upper support stand but also placed and received on the upper end surface of the lower support stand, It is possible to further improve the fixing strength to the base, and thus to the main pillar.
[0050]
In addition, in the invention according to claim 6, in addition to the effect of claim 1, a tread plate mounting surface on which the tread plate is mounted and a lower portion of the front edge of the tread plate are vertically provided on the left and right ends of the support base. The vertical riser plate contact surface for contacting the riser plate is provided respectively, and this support base is fixed to the peripheral surface of the main pole so that it can be turned upside down, so by using this support base upside down, Two types of left and right footboard mounting surfaces and riser abutment surfaces can be used. This means that the versatility of the support base can be increased, the variety of support bases can be reduced, and the production cost of the surrounding stairs can be reduced. Can be planned.
[Brief description of the drawings]
FIG. 1 is a perspective view of an example of an embodiment of the present invention.
FIG. 2 is a plan view of the same.
FIG. 3 is an explanatory view illustrating an arrangement of the support bases in the embodiment.
FIG. 4 is a perspective view showing a state where the support base is fixed to a main pillar.
FIG. 5 is an explanatory diagram illustrating another example of the embodiment of the present invention.
FIG. 6 is an explanatory diagram illustrating the upside down of a support base in still another example of the embodiment of the present invention.
FIG. 7 is a perspective view showing a state where the support base is fixed to a main pillar.
FIG. 8 is a perspective view of still another example of the embodiment of the present invention.
FIG. 9 is a plan view of the same.
FIG. 10 is an explanatory diagram for explaining an arrangement of the support bases in the embodiment.
FIG. 11 is a perspective view showing a state where the support base is fixed to a main pillar.
FIG. 12 is an explanatory diagram illustrating the upside down of a dual-purpose support base in still another example of the embodiment of the present invention.
FIG. 13 is a perspective view showing a state where the support base is fixed to a main pillar.
FIG. 14 is a perspective view showing an example of the related art.
FIG. 15 is a perspective view showing another example of the prior art.
FIG. 16 is a perspective view showing still another example of the prior art.
[Explanation of symbols]
1 main pillar
1a one side
1b Top floor
1c Floor below
2 treads
3 riser
4 support base
5 Support table mounting surface
6 Support table contact surface
7 Footboard mounting surface
8 Raised plate contact surface
9 Tread insertion groove
10 Notch
A Upstairs direction
B Downstairs direction
C corner
