JP3798761B2 - Anchor for board, binding tool for hollow slab using the same, and spacer for hollow slab - Google Patents

Anchor for board, binding tool for hollow slab using the same, and spacer for hollow slab Download PDF

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JP3798761B2
JP3798761B2 JP2003116459A JP2003116459A JP3798761B2 JP 3798761 B2 JP3798761 B2 JP 3798761B2 JP 2003116459 A JP2003116459 A JP 2003116459A JP 2003116459 A JP2003116459 A JP 2003116459A JP 3798761 B2 JP3798761 B2 JP 3798761B2
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anchor
board
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holding member
shaft
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JP2004324067A (en
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康弘 小田
泰行 細井
敏郎 盆子原
知昭 渡辺
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Penta Ocean Construction Co Ltd
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Penta Ocean Construction Co Ltd
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Description

【０００１】
【発明の属する技術分野】
本発明は、型枠などのボード類に種々の機器を取り付けるために型枠などのボード類に固定するボード用アンカー、及び、これを用いて型枠に取り付けるスペーサで、特に中空スラブの鉄筋を所定位置に位置せしめるための中空スラブ用スペーサに関する。
【０００２】
【従来の技術】
特許第３３１１３４０号公報には、下筋用と上筋用を兼用した中空スラブ用のスラブスペーサが開示されている。これは、下筋を保持する支持基台と、これから立設した２本の支柱と、支柱の上部に設けた上筋を保持する支持部を有し、型枠に支持基台を取り付けた後に下筋を配筋し、その後支持基台に支柱を取り付け、掛止部を折り曲げて支柱を固定し、その後上筋を配筋し、折曲部を折り曲げて上筋を固定するものである。このスラブスペーサは、上筋を固定して浮き上がりを防止するので、スラブの中空部を形成するボイドが浮力を受けてコンクリート内から浮き上がるのを防ぐための特別なボイド浮き上がり防止具（実公昭６２−４１０３、特開平１１−１０７５２７、特開２０００−１９２６５４等）を設けなくともよく、スラブスペーサがボイドの浮き上がり防止具を兼用する点で優れている。
【０００３】
【発明が解決しようとする課題】
しかし、特許第３３１１３４０号公報のスラブスペーサには次のような問題点があった。
▲１▼ ２本の支柱が一体化された構成であるので、構造が複雑で製造コストが高くなっていた。
▲２▼ 支持基台に支柱を固定するのに掛止部を折り曲げなければならないので、煩雑で作業能率が悪かった。また、支柱の固定が不十分となりやすかった。
▲３▼ 上筋を固定するのに折曲部を折り曲げなければならないので、煩雑で作業能率が悪かった。また、上筋の固定が不十分となりやすかった。
【０００４】
また、実公昭６２−４１０３には、ボイド浮き上がり防止具を型枠に固定する手段が開示されているが、この手段では、型枠解体時に、植込みボルトとナットの両方を撤去する必要があり、面倒であった。
【０００５】
本発明は、簡単な構造で安価に製造でき、型枠へ固定する場合は上下で同時に作業する必要がなく上部からの作業のみで容易に固定でき、型枠型枠解体時に一部品の撤去で済むボード用アンカー、並びにこれを用いた中空スラブ用緊結具及びスラブスペーサを開発することを課題としてなされたものである。
【０００６】
【課題を解決するための手段】
本願の請求項１の発明は、表裏貫通する非円形貫通孔（５、２５）を有する基板（４、２４）の裏面の貫通孔周囲から、外側に向かって膨出する抜止部（７、２７）を下端に有する垂下部（６、２６）を垂下形成したアンカー本体（２、２２）と、前記貫通孔（５、２５）と垂下部（６、２６）の中に挿通可能で所定角度回転することで引き抜き不能となる非円形の下頭部（１１、２８）を下端に備えた軸体（３、２３）とからなり、前記アンカー本体（２、２２）をボードに形成した穴に挿入すると前記基板（４、２４）の背面と抜止部（７、２７）の間でボードを挟持してアンカー本体（２、２２）がボードに固定され、このアンカー本体（２、２２）に前記軸体（３、２３）を挿入して所定角度回転することで前記下頭部（１１、２８）が前記垂下部（６、２６）の下端に係合して引き抜き不能となることを特徴とするボード用アンカーである。アンカー本体をボードに片側から差し込むだけでボードに固定できるので、ボードへの固定作業がきわめて簡単である。軸体は、アンカー本体の貫通孔に挿入し、所定角度回転すればよいので、軸体の取り付け作業もきわめて簡単である。
【０００７】
本願の請求項２の発明は、請求項１のボード用アンカーにおいて、前記垂下部（６、２６）の外周面が粗面に形成されていることを特徴とするボード用アンカーである。ここで粗面とは、細かい凹凸、やや大きな凹凸、突条、溝等が形成されて摩擦が大きくなっている面をいう。垂下部の外面が粗面となっているのでアンカー本体とボードの摩擦が大きくなり、軸体を所定角度回転する際にアンカー本体が共に回転するのを防止できる。
【０００８】
本願の請求項３の発明は、請求項１又は２のボード用アンカーにおいて、前記垂下部（６、２６）が２本対向して形成されており、その対向する垂下部（６、２６）の下端の隙間をなくすように閉じると、下端の抜止部（７、２７）の外径がボードの穴径とほぼ等しくなることを特徴とするボード用アンカーである。このように構成すると、垂下部下端の抜止部の突出量を最大にすることができ、アンカーの引き抜き強度が最大となる。
【０００９】
本願の請求項４の発明は、垂下部（６３）と、その上端に形成された基板（６４）とからなり、垂下部（６３）の下端には外側に膨出する抜止部（６５）を形成し、垂下部（６３）の内壁には下部が上部よりも内径が大きくなるような段部（６６）を形成したアンカー本体（６１）と、下部に矢印状の抜止バネ部（６８）を有する軸体（６２）とからなり、前記アンカー本体（６１）をボードに形成した穴に挿入すると前記基板（６４）の背面と抜止部（６５）の間でボードを挟持してアンカー本体（６１）がボードに固定され、このアンカー本体（６１）に前記軸体（６２）を挿入すると、前記抜止バネ部（６８）が前記段部（６６）に係合して引き抜き不能となることを特徴とするボード用アンカーである。アンカー本体をボードに片側から差し込むだけでボードに固定できるので、ボードへの固定作業がきわめて簡単である。軸体は、アンカー本体に挿入するだけよいので、軸体の取り付け作業もきわめて簡単である。抜止バネ部によって垂下部の内壁が外側に押圧され、抜止部が確実にボードの裏側に係合する。垂下部は縦溝を形成すると、変形しやすくなってボードの穴に容易に挿入できるようになる。
【００１０】
本願の請求項５の発明は、請求項４のボード用アンカーにおいて、前記垂下部（６３）の内壁上部に、前記抜止バネ部（６８）に対応してテーパ状のガイド部（８６）を形成し、前記アンカー本体（６１）に前記軸体（６２）を挿入するときに、ガイド部（８６）がガイドとなって軸体（６２）が容易に、かつ、所定の向きに挿入されることを特徴とするボード用アンカーである。ガイド部を設けることで、軸体の挿入が容易になり、かつ、軸体の向きを所定の向きにそろえることができる。
【００１１】
本願の請求項６の発明は、表裏貫通し円形の対向する２端部を弓形に切り欠いたタイコ形をなす貫通孔（１５３）を有する基板（１５２）の裏面の前記弓形部分から、該弓形の断面形状をなし、外側に向かって膨出する抜止部（１５５）を下端に有する垂下部（１５４）を垂下形成したアンカー本体（１５１）と、下部に矢印状の抜止バネ部（１６１）を有する軸体（１６０）とからなり、前記アンカー本体（１５１）をボードに形成した穴に挿入すると前記基板（１５２）の背面と抜止部（１５５）の間でボードを挟持してアンカー本体（１５１）がボードに固定され、このアンカー本体（１５１）の前記貫通孔（１５３）に前記軸体（１６０）を挿入すると、前記抜止バネ部（１６１）が前記垂下部の下で開いて引き抜き不能となるボード用アンカーであって、前記抜止バネ部（１６１）の平面形状が前記タイコ形をなし、縮めた状態では前記貫通孔（１５３）を通過可能で、解放した状態では前記垂下部に引っ掛かって引き抜き抜き不能となることを特徴とするボード用アンカーである。アンカー本体の貫通孔の形状をタイコ形とすることで、垂下部の抜止部を最も大きくすることができ、耐引き抜き力が大きくなる。軸体の抜止バネ部の形状もタイコ形とすることで、耐引き抜き力が大きくなる。
【００１２】
本願の請求項７の発明は、請求項１〜６のいずれかのボード用アンカーにおいて、前記軸体の軸に脆弱に形成された破断部（１６、３０）を設けたことを特徴とするボード用アンカーである。このアンカーは、特にボードが型枠である場合に好適なもので、コンクリートの硬化後に型枠を取り外す場合、型枠の裏面から軸体を回転することで軸体が破断し、下頭部又は抜止バネ部を含む軸体下部を取り外すことができ、型枠の取り外しが可能となる。すなわち、１部材を取り外すことで型枠を取り外すことができるので、作業がきわめて簡単となる。
【００１３】
本願の請求項８の発明は、上下方向に貫通し内周に雌ねじを有するボルト孔（９２）を有し、側面にはボードが嵌合する三日月形状の嵌合溝（９３）を有する概略円筒形状のアンカー本体（９１）と、該アンカー本体（９１）をボードに形成した円形穴（５７）に差し入れた後横方向に移動して前記嵌合溝（９３）に前記円形穴（５７）の周囲の部分のボードを嵌合してアンカー本体（９１）をボードに保持せしめたときに生じる円形穴（５７）との隙間を閉塞する三日月形状のパッキン材（９４）とからなることを特徴とするボード用アンカーである。アンカー本体をボードに片側から差し込み、横に移動してパッキン材を填め込むことでボードに固定できるので、ボードへの固定作業が片側だけの作業でよく、きわめて簡単である。
【００１４】
本願の請求項９の発明は、請求項８のボード用アンカーにおいて、前記ボルト孔（９２）が雌ねじを有し、該雌ねじがアンカー本体（９１）に装着された金属ナット（１００）によって形成されていることを特徴とするボード用アンカーである。雌ねじが金属であるので、種々の機材を雌ねじに螺合して取り付けたときの取付強度が大きくなる。本体はプラスチック製とすることで安価に製造できる。
【００１５】
本願の請求項１０の発明は、請求項１〜７のいずれかのボード用アンカーの前記軸体（３）の上部に鉄筋及び／又はボイドの浮き上がりを防止する浮上防止手段（１２）を設けたことを特徴とする中空スラブ用緊結具である。軸体の上部に浮き上がり防止手段を設けることで、ボード用アンカーを中空スラブのボイド（中空部分を成形する中子）を緊結して浮き上がりを防止する中空スラブ用緊結具として用いることができる。ボード用アンカーの耐引き抜き力によって、鉄筋やボイドの浮力に対抗できる。浮上防止手段としては、鈎状に形成して引っ掛ける方式、挟みつける方式、ボルトなどで固定する方式など、種々の公知手段を採用できる。
【００１６】
本願の請求項１１の発明は、請求項８又は９のボード用アンカーの前記ボルト孔に、上部に鉄筋及び／又はボイドの浮き上がりを防止する浮上防止手段を有する軸体を螺着したことを特徴とする中空スラブ用緊結具である。この場合も、請求項１０の発明と同様に、ボード用アンカーを中空スラブ用緊結具として用いることができる。
【００１７】
本願の請求項１２の発明は、上筋及び／又は下筋を所定の高さ位置に保持する鉄筋保持部と、鉄筋及び／又はボイドの浮き上がりを防止する浮上防止手段（３５、７３）を有するスペーサ本体（３２、７０）と、上部に任意の接合手段（２９、６７）を備える前記軸体（２３、６２）を有する請求項１〜７のいずれかのボード用アンカーとからなり、前記スペーサ本体（３２、７０）は前記軸体（２３、６２）の接合手段（２９、６７）と接合可能な接合部（３６、８３）を有することを特徴とする中空スラブ用スペーサである。軸体の上部に接合手段を設け、これにスペーサ本体下部の接合部を接合することで、ボード用アンカーにスペーサ本体を接合し、中空スラブ用スペーサとして用いることができる。ボード用アンカーの耐引き抜き力によって、鉄筋やボイドの浮力に対抗できる。接合手段、接合部の構造は任意である。
【００１８】
本願の請求項１３の発明は、下筋保持部（３３、７１）、上筋保持部（３４、７２）及び上筋の浮き上がりを防止する浮上防止手段（３５、７３）を有するスペーサ本体（３２、７０）と、請求項１〜７のいずれかのボード用アンカーからなり、前記スペーサ本体（３２、７０）は前記軸体（２３、６２）の接合手段（２９、６７）と接合可能な接合部（３６、７４）を有することを特徴とする中空スラブ用スペーサである。下筋保持部と上筋保持部によって、下筋と上筋を所定の高さ位置に保持でき、また上筋の浮き上がりを防止する浮上防止手段を有するので、ボイドを上筋に接続しておけば、ボイドが浮力で浮き上がることも防止できる。
【００１９】
本願の請求項１４の発明は、請求項１３のスペーサにおいて、前記スペーサ本体（３２、７０）は下筋保持部（３３、７１）を有する下筋保持部材（３７、７５）と、上筋保持部（３４、７２）及び上筋浮上防止手段（３５、７３）を有する上筋保持部材（３８、７６）と、下筋保持部材（３７、７５）と上筋保持部材（３８、７６）を連結する支柱部材（３９、７７）とを有し、該支柱部材（３９、７７）が上下端に雄ねじが形成されたボルトであり、該支柱部材（３９、７７）の下端の雄ねじを前記下筋保持部材（３７、７５）に形成した雌ねじに螺着し、上端の雄ねじを前記上筋保持部材（３８、７６）に形成した雌ねじに螺着したことを特徴とする中空スラブ用スペーサである。スペーサ本体が上記の構成であるので、下筋保持部材及び上筋保持部材をプラスチック製とすることができ、支柱部材は市販の両端にねじを有するボルトを使用できるので、スペーサ本体を安価かつ容易に製造できる。
【００２０】
本願の請求項１５の発明は、請求項１４のスペーサにおいて、前記下筋保持部材（３７、７５）及び上筋保持部材（３８、７６）の雌ねじが、下筋保持部材（３７、７５）及び上筋保持部材（３８、７６）に形成され、かつ、下筋保持部材（３７、７５）及び上筋保持部材（３８、７６）の側面に開口するナット装着部（４０、７８、４１、７９）に挿入、装着した金属ナット（４２、８０、４３、８１）の雌ねじであることを特徴とする中空スラブ用スペーサである。下筋保持部材及び上筋保持部材をプラスチック製とすることができ、金属ナットを填め込むだけで雌ねじが形成できるので、製造が安価、容易であり、雌ねじが金属製となるので、強度も大きくなる。
【００２１】
本願の請求項１６の発明は、請求項１２〜１５のいずれかのスペーサにおいて、前記軸体（２３）の接合手段（２９）が非円形の上頭部であり、前記スペーサ本体の接合部（３６）がスペーサ本体（３２）の下面に形成された非円形の挿入口（４４）とその奧の回転空所（４５）であり、軸体（２３）の上頭部をスペーサ本体（３２）の挿入口（４４）から回転空所（４５）に挿入し、所定角度回転することで上頭部が引き抜き不能となることを特徴とする中空スラブ用スペーサである。このように構成すると、軸体とスペーサ本体との接合が容易となる。
【００２２】
本願の請求項１７の発明は、請求項１６のスペーサにおいて、前記スペーサ本体（３２）の下面に位置決め片（４６）を、前記アンカー本体（２２）の基板（２４）上面に位置決め突起（４７、４８）を設け、スペーサ本体（３２）とアンカー本体（２２）を相対的に所定角度回転したときに、位置決め片（４６）が位置決め突起（４７、４８）に係合してスペーサ本体（３２）とアンカー本体（２２）とが相対的に位置決めされて回転が拘束されることを特徴とする中空スラブ用スペーサである。このように構成すると、軸体とスペーサ本体とが位置決めされ、不用意に軸体とスペーサ本体が分離してしまうのを防止できる。
【００２３】
本願の請求項１８の発明は、請求項１６又は１７のスペーサにおいて、前記軸体（２３）の上部にストッパ片（５８）が、スペーサ本体（３２）の下面にストッパ突起（５９）が形成され、前記軸体（２３）とスペーサ本体（３２）とを相対的に所定角度回転したときにストッパ片（５８）がストッパ突起（５９）に当接して軸体（２３）とスペーサ本体（３２）の相対的な回転が拘束されることを特徴とする中空スラブ用スペーサである。このように構成すると、軸体を予めスペーサ本体に取り付ける場合、所定角度回転したときに回転が停止するので、確実に軸体をスペーサ本体に取り付けることができる。
【００２４】
本願の請求項１９の発明は、下筋保持部材（１７０）、上筋保持部材及び上筋の浮上を防止する浮上防止手段を有するスペーサ本体と、上部に接合手段（１６２）である螺条を有する前記軸体（１６０）を有する請求項６のボード用アンカーとからなり、前記下筋保持部材（１７０）は前記軸体（１６０）の接合手段（１６２）と接合可能な接合部（１６６）を有する中空スラブ用スペーサであって、前記軸体（１６０）の接合手段（１６２）と前記下筋保持部材（１７０）の接合部（１６６）とを接合したときに、前記スペーサ本体と前記下筋保持部材とが一体化し、どちらか一方を回転させると他方が共に回転することを特徴とする中空スラブ用スペーサである。ボード用アンカーに下筋保持部材を接合した後、下筋保持部材の向きを調整するために回転させたとき、ボード用アンカーが共に回転するので、軸体（抜止バネ部）とアンカー本体との位置関係が変化せず、軸体の耐引き抜き強度が弱化するのを防止できる。
【００２５】
本願の請求項２０の発明は、請求項１９のスペーサにおいて、前記軸体（１６０）及び下筋保持部材（１７０）に、相互の位置合わせのための目印を設けたことを特徴とする中空スラブ用スペーサである。軸体と下筋保持部材の目印を合わせることで、軸体と下筋保持部材とを接合する場合、正しい位置関係に容易に接合できる。
【００２６】
本願の請求項２１の発明は、請求項１９又は２０のスペーサにおいて、前記接合部（１６６）が前記下筋保持部材（１７０）に装着したナットであり、該ナットの上部が前記下筋保持部材（１７０）の上部に突出して下筋（５３）の移動を制限することを特徴とする中空スラブ用スペーサである。下筋の移動が制限されるので、下筋配筋の際に下筋が所定の位置から外れにくく、配筋作業が容易となる。
【００２７】
本願の請求項２２の発明は、請求項１４、１５、１９、２０又は２１のスペーサにおいて、前記下筋保持部材が下筋との結束が可能なものであることを特徴とする中空スラブ用スペーサである。ボイドと下筋を結合し、ボイドの浮力が下筋に作用したとき、下筋を下筋保持部に結束することで下筋が浮き上がるのを防止できる。
【００２８】
本願の請求項２３の発明は、下筋保持部（１０３）上筋保持部及び上筋の浮き上がりを防止する浮上防止手段を有し、下面からボルトを突出したスペーサ本体（１０１）と、請求項８又は９のボード用アンカーとからなり、前記スペーサ本体（１０１）のボルトを前記ボード用アンカーのボルト孔に螺合することを特徴とする中空スラブ用スペーサである。スペーサ本体のボルトをアンカー本体のボルト孔に螺合するのみで、アンカー本体にスペーサ本体を取り付け、ボード用アンカーを容易に中空スラブ用スペーサとして利用することができる。
【００２９】
本願の請求項２４の発明は、請求項２３のスペーサにおいて、前記スペーサ本体（１０１）は下筋保持部（１０３）を有する下筋保持部材（１０２）と、上筋保持部及び上筋浮上防止手段を有する上筋保持部材と、下筋保持部材（１０２）と上筋保持部材を連結する支柱部材（１０４）とを有し、前記支柱部材（１０４）が上下端に雄ねじが形成されたボルトであり、該支柱部材（１０４）の下端の雄ねじを前記下筋保持部材（１０２）の雌ねじに螺着すると共に支柱部材（１０４）の下端を下筋保持部材（１０２）の下面から下方に突出させ、上端の雄ねじを前記上筋保持部材の雌ねじに螺着したことを特徴とする中空スラブ用スペーサである。下筋保持部材及び上筋保持部材をプラスチック製とすることができ、支柱部材は市販の両端にねじを有するボルトを使用できるので、スペーサ本体を安価かつ容易に製造できる。
【００３０】
なお、本願発明において支柱部材に破断部を設けることで、支柱部材の下部を回転させて破断部を破断し、支柱部材の下部を取り除くと、下筋保持部材の雌ねじを天井下地、電気器具、空調ダクトなどを吊り下げるアンカーとして利用でき、別途にこのような天井用アンカーを取り付ける必要がなくなる。
【００３１】
本願の請求項２５の発明は、請求項７のボード用アンカーにおいて、該ボード用アンカーが型枠（５１）とその上に設けた断熱材（５２）とを複合したボードに用いるものであり、前記垂下部（６’）に脆弱に形成された破断部（３１）を設けたことを特徴とするボード用アンカーである。垂下部の下部を回転して破断部を破断し、取り除くことで、型枠を取り除くことが可能となる。なお、請求項１〜２４の断熱材を用いない場合は、本発明のアンカー本体は型枠に取り付けたままで、転用することができる。
【００３２】
本願の請求項２６の発明は、請求項１２〜１８のいずれかのスペーサにおいて、前記ボード用アンカーが請求項２５のボード用アンカーであることを特徴とする中空スラブ用スペーサである。断熱材を用いる場合でも、断熱材を用いない場合と同様に、スペーサ本体を接合してボード用アンカーを中空スラブ用スペーサに利用することができる。
【００３３】
本願の請求項２７の発明は、型枠（５１）とその上に設けた断熱材（５２）とを複合したボードに用いるボード用アンカーであって、表裏貫通する円形の貫通孔（１３１）を有する基板（１３０）の裏面の貫通孔周囲から、外側に向かって膨出する抜止部（１２４）を下端に有する垂下部（１２２）を垂下形成したアンカー本体（１２０）と、上部軸（１３２）が前記貫通孔（１３１）とほぼ同径、下部軸（１３３）がそれよりも小径に形成され、該上部軸（１３２）と下部軸（１３３）の境目が型枠（５１）と断熱材（５２）の境目付近にあり、前記貫通孔（１３１）と垂下部（１２２）の中に挿通可能で所定角度回転することで引き抜き不能となる非円形の下頭部（１３４）を下端に備えた軸体（１２１）とからなり、前記アンカー本体（１２０）をボード（５１、５２）に形成した穴に挿入すると前記基板（１３０）の背面と抜止部（１２４）の間でボード（５１、５２）を挟持してアンカー本体（１２０）がボードに固定され、このアンカー本体（１２０）に前記軸体（１２１）を挿入して所定角度回転することで前記下頭部（１３４）が前記垂下部（１２２）の下端に係合して引き抜き不能となることを特徴とするボード用アンカーである。このように構成すると、断熱材の部分において、アンカー本体を軸体との間に隙間が生じないので、断熱性能が低下することがない。
【００３４】
本願の請求項２８の発明は、請求項２７のボード用アンカーにおいて、前記垂下部（１２２）の型枠（５１）と断熱材（５２）の境目に相当する付近に脆弱に形成された破断部（１２５）を設け、前記上部軸（１３２）の直下に脆弱に形成された破断部（１３８）を設けたことを特徴とするボード用アンカーである。このように構成すると、破断部で破断することで、断熱材部分はアンカー本体及び軸体が残り、型枠部分は取り除くことができるから、型枠を取り除くことが可能となり、断熱性能の低下も防止できる。
【００３５】
本願の請求項２９の発明は、請求項２８のボード用アンカーにおいて、前記下部軸（１３３）外周にストッパ（１３７）を突設し、前記垂下部（１２２）内面にこれに対応するストッパ受部（１２６）を突設し、前記軸体（１２１）を所定角度回転すると、前記ストッパ（１３７）が前記ストッパ受部（１２６）に当接して回転が停止し、型枠解体時には前記下頭部（１３４）を強い力で回転すると、前記ストッパ（１３７）が前記ストッパ受部（１２６）に当接しているために下部軸（１３３）と共に垂下部（１２２）の下部（１２３）が回転し、破断部（１３８）が破断して下部軸（１３３）を取り外せると共に、破断部（１２５）が破断して垂下部（１２２）の下部（１２３）を取り外せることを特徴とするボード用アンカーである。このように構成すると、軸体の下頭部をのみを回転すれば、ストッパがストッパ受部に当接しているために、下部軸と共に垂下部の下部が回転し、破断部が破断して下部軸と垂下部の下部を取り外すことができ、型枠を取り外すことができるようになる。
【００３６】
【発明の実施の形態】
実施例１：
図１〜４は本発明の実施例のボード用アンカーと、これを用いた中空スラブ用緊結具１に関し、図１は中空スラブ用緊結具１の一部を切欠して示す説明図、図２はアンカー本体２の斜視図、図３はアンカー本体２を型枠５１に挿入する説明図、図４は軸体３の斜視図である。
【００３７】
本実施例のボード用アンカー及び中空スラブ用緊結具１はアンカー本体２と軸体３からなる。アンカー本体２はプラスチック製で、表裏貫通する非円形貫通孔５を有する基板４と、基板４の裏面の貫通孔５周囲から垂下形成した２個の垂下部６からなり、垂下部６の下端には外側に向かって膨出する抜止部７が形成されている。基板４は円盤状をなし、中央に非円形の貫通孔５を有する。貫通孔の形状は非円形であればよいが、円形の対向する２端部を弓形に切り欠いたタイコ形とするのが好ましい。基板４の上面外周縁には立上部１０とストッパ９が形成されている。垂下部６は円柱の中央部を縦に刳り抜いた形状をしており、その長さは取り付けるボード（型枠５１）の厚さよりやや長くなっている。このような形状とすることで、また、基板４の裏面の切込８と相俟って、ボード（型枠５１）の穴に垂下部６を差し込むときに垂下部６が変形しやすくなり、差し込みが容易となる。垂下部の形状は他に円筒形状や円筒に縦方向の溝を設けた形状などとすることができる。垂下部６の外周面は摩擦が大きくなるような粗面となっている。図３に示すように、ボード（型枠５１）には垂下部６の外径ｄとほぼ同じ穴を設け、その穴に上から垂下部６を差し込むと、対向する垂下部６の下端の隙間が閉じてなくなり、下端の抜止部７の外径がボードの穴径とほぼ等しくなる。このようにすると、垂下部６下端の抜止部７の突出量を最大にすることができ、アンカーの引き抜き強度が最大となる。抜止部７がボード（型枠５１）を通過したところで垂下部６が弾性復帰して広がり、基板４の背面と抜止部７の間でボード（型枠５１）を挟持してアンカー本体がボードに固定される。
【００３８】
軸体３はプラスチック製で、円柱状をなし、下端に非円形の下頭部１１を有し、上端に鈎状に曲がった接合手段１２が、その中間に円板部１３が形成されている。円板部１３上面にはストッパ１４が１８０°反対側に２個、外側に突出して設けられている。下頭部１１は非円形であればよいが、前記の貫通孔５と同様のタイコ形とするのが好ましい。円板部１３のすぐ下側は周溝を設けることによって脆弱に形成した破断部１６となっている。下頭部１１の下面には六角形の回動手段１５が設けられている。
【００３９】
中空スラブ用緊結具１は、図１に示すように使用される。型枠５１（厚さ１２ｍｍのベニヤ板）に円形の穴を開け、この穴に、型枠の上からアンカー本体２を挿入して固定する。次に軸体３を、下頭部１１と貫通孔５の向きを合わせて、アンカー本体２の貫通孔５に円板部１３が基板４の上面に当接するまで挿入する。このとき、円板部１３は立上部１０の内側に入り込む。次に、軸体３を９０°回転させると、ストッパ１４がストッパ受部９に当接して回転が停止し、下頭部１１が垂下部６の下端に係合して引き抜き不能となる。軸体３の軸部分の外径は垂下部６の間隔とほぼ等しくなっているので、軸体３をアンカー本体２に挿入することで、垂下部６の間隔が確実に所定の間隔に復帰し、アンカー本体２がボード（型枠５１）から引き抜けることが防止される。そして、鈎状の浮上防止手段１２を下配力筋５４に引っ掛ける。このようにすると、下筋（下配力筋５４及び下主筋５３）の浮き上がりが防止されるから、ボイドを直接又は間接的に下筋に結合しておけば、ボイドが浮力で浮き上がるのを防止できる。浮上防止手段は、上筋に接続して上筋の浮上を防止するものでもよいし、ボイドに直接又はボイドの付属部品（貫通筋１４１等）に接続するものでもよい。コンクリートを打設し、硬化後に型枠５１を取り外すときは、型枠５１の下側からスパナなどで回動手段１５を回転させると、破断部１６が切断し、軸体３の下部が抜け落ちる。そうすれば、スペーサ本体２が取り付けられたままの型枠５１をコンクリートスラブから取り外すことができる。スペーサ本体２が取り付けられたままの型枠５１は、次の階のスラブの型枠としてそのまま利用できる。
【００４０】
実施例２：
図５〜図１１は本発明の実施例のボード用アンカーと、これを用いた中空スラブ用スペーサ２１に関し、図５は中空スラブ用スペーサ２１の一部を切欠して示す説明図、図６はアンカー本体２２の斜視図、図７は軸体２３の斜視図、図８は上筋保持部材３８の側面説明図、図９は下筋保持部材３７の斜視図、図１０、１１はアンカー本体２２と下筋保持部材３７を接合した状態の斜視図である。
【００４１】
本実施例のボード用アンカーはアンカー本体２２と軸体２３からなる。アンカー本体２２はプラスチック製で、表裏貫通する非円形貫通孔２５を有する基板２４と、基板２４の裏面の貫通孔２５周囲から対向して垂下形成した２個の垂下部２６からなり、垂下部２６の下端には外側に向かって膨出する抜止部２７が形成されている。基板２４は円板状をなし、中央に非円形の貫通孔２５を有する。貫通孔の形状は非円形であればよいが、タイコ形とするのが好ましい。基板２４の上面外周には、スペーサ本体３２の位置決め片４６と係合する位置決め突起４７、４８が形成されている。位置決め片４６は位置決め突起４７、４８の間に入り込んで係合し、位置決めされる。位置決め突起４７は位置決め片４６が入り込みやすいようにテーパ状をなしている。垂下部２６は円柱の中央部を縦に刳り抜いた形状をしており、その長さは取り付けるボード（型枠５１）の厚さよりやや長くなっている。この形状は前記のアンカー本体２と同じ形状で、基板２４の裏面の切込４９と相俟って、ボード（型枠５１）の穴に垂下部２６を差し込むときに垂下部２６が変形しやすくなり、差し込みが容易となり、抜止部２７を最も幅広にして耐引き抜き強度を最大にできる。垂下部の形状は他に円筒形状や円筒に縦方向の溝を設けた形状などとすることができる。ボード（型枠５１）には垂下部２６の外径とほぼ同じ径の円形の穴を設け、その穴に上から垂下部２６を差し込むと抜止部２７がボード（型枠５１）を通過したところで垂下部が弾性復帰して広がり、基板２４の背面と抜止部２７の間でボード（型枠５１）を挟持してアンカー本体がボードに固定される。
【００４２】
軸体２３はプラスチック製で、円柱状をなし、下端に非円形の下頭部２８を有し、上端に接合手段２９である非円形の上頭部を有する。下頭部２８及び上頭部の形状は非円形であればよいが、前記の貫通孔２５と同様にタイコ形とするのが好ましい。また、下頭部２８及び上頭部の向きは共に同じ向き（長辺どうしが同じ向き）とするのがよい。上頭部のやや下方にはストッパ片５８が形成されている。ストッパ片５８の形状もタイコ形となっており、その向きは下頭部２８及び上頭部と直角とするのがよい。ストッパ片５８のすぐ下側は周溝を設けることによって脆弱に形成した破断部３０となっている。下頭部２８の下面には六角形の回動手段５０が設けられている。
【００４３】
ボード（型枠５１）に固定したアンカー本体２２の貫通孔２５と垂下部２６の中に軸体２３を上から挿入する。下頭部２８が貫通孔２５と垂下部２６を通過したところで所定角度（この場合は９０°）回転すると、下頭部２８の外端が垂下部２６の下側に入り込み、軸体２３は引き抜き不能となる。軸体２３の軸部分の外径は垂下部２６の間隔とほぼ等しくなっているので、軸体２３をアンカー本体２２に挿入することで、垂下部２６の間隔が確実に所定の間隔に復帰し、アンカー本体２２がボード（型枠５１）から引き抜けることが防止される。アンカー本体２２及び軸体２３はボード（型枠５１）の片側（上側）から差し込んで固定できるので、取り付け作業がきわめて容易である。
【００４４】
スペーサ本体３２は下筋保持部材３７、上筋保持部材３８及び１本の支柱部材３９からなる。下筋保持部材３７はプラスチック製で、下筋保持部３３が３カ所外側に向かって張り出し形成されている。下筋保持部３３上には下主筋５３が支持され、その上にこれと直行する下配力筋５４が支持される。金属ナット４２が、下筋保持部材３７内に形成されかつ下筋保持部材３７の側面に開口するナット装着部４０に外側から挿入され装着されている。金属ナット４２には支柱部材３９が螺着される。また、下筋保持部材３７の下面には接合部３６として、非円形の挿入口４４とその奧（上側）の回転空所４５が設けられている。挿入口４４の形状は、軸体２３の上頭部（接合手段２９）に対応してタイコ形となっている。回転空所４５は上頭部が内部で回転可能な円筒形状となっている。軸体２３の上頭部を挿入口４４から回転空所４５に挿入し、所定角度回転（この場合は９０°）することで上頭部が引き抜き不能となる。また、所定角度回転すると軸体２３のストッパ片５８がストッパ突起５９に当接し、それ以上回転することができなくなる。
【００４５】
上筋保持部材３８はプラスチック製で、上筋保持部３４が１８０°反対側に２カ所、外側に向かって張り出し形成されている。上筋保持部３４の上には上配力筋５６が支持され、その上にこれと直行する上主筋５５が支持される。上筋保持部３４の上方には断面がエの字形の棒状の浮上防止手段３５が上筋保持部３４と直角の向きに設けられている。上筋（上主筋５５、上配力筋５６）に浮き上がる力が作用した場合、浮上防止手段３５が上主筋５５に当接し、上筋の浮上が防止される。また、金属ナット４３が、上筋保持部材３８内に形成されかつ上筋保持部材３８の側面に開口するナット装着部４１に側面から挿入され装着されている。金属ナット４３には支柱部材３９が螺着される。
【００４６】
支柱部材３９は両端に雄ねじを有するボルトで、下端の雄ねじを金属ナット４２に螺合することで下筋保持部材３７を取り付け、上端の雄ねじを金属ナット４３に螺合することで上筋保持部材３８を取り付ける。
【００４７】
次に、中空スラブ用スペーサ２１の好ましい組み立て順序の例を説明する。支柱部材３９の両端には予め金属ナット４２、４３を螺着しておく。次に下端の金属ナット４２を下筋保持部材３７のナット装着部４０に側面から差し込むことで下筋保持部材３７を取り付け、上端の金属ナット４３を上筋保持部材３８のナット装着部４１に側面から差し込むことで上筋保持部材３８を取り付け、スペーサ本体３２の組み立てが完了する。また、軸体２３は下筋保持部３７の下面に差し込み所定角度回転して取り付けておく。アンカー本体２２は型枠５１の穴に差し込んで取り付けておく。最後に、スペーサ本体３２に取り付けてある軸体を型枠に取り付けてあるアンカー本体２２に差し込んで所定角度回転し、スペーサ本体を型枠に固定する。
【００４８】
スラブ型枠上にコンクリートを打設し、硬化後型枠を解体する場合は、型枠の下側からスパナなどの工具で回動手段５０を回動する。すると、破断部３０で軸体２３が破断し、軸体２３の破断部３０から下側の部分を取り除くことができ、型枠５１を取り除けるようになる。アンカー本体２２は型枠に取り付けられたままになっているので、このまま次の階のスラブ型枠として転用できる。
【００４９】
実施例３：
図１２〜図１８は本発明の実施例のボード用アンカーと、これを用いた中空スラブ用スペーサ６０に関し、図１２は中空スラブ用スペーサ６０の一部を切欠して示す説明図、図１３はアンカー本体６１の平面、側面及び底面を示す説明図、図１４は軸体６２の底面図、図１５は下筋保持部材７５の正面と側面を示す説明図、図１６は下筋保持部材７５の平面図、図１７は上筋保持部材７６の正面と側面を示す説明図、図１８は上筋保持部材７６の底面図である。
【００５０】
本実施例のボード用アンカーはアンカー本体６１と軸体６２からなる。アンカー本体６１はプラスチック製で、中央に表裏貫通する円形の貫通孔６３ａを有する円板状の基板６４と、基板６４背面の貫通孔６３ａの周囲から垂下形成された円筒状の垂下部６３とからなる。垂下部６３の下端は外側に膨出する抜止部６５となっている。垂下部６３の内壁は上部の内径が小さく、下部の内径が大きくなっており、その境目が段部６６となっている。段部６６の高さ位置は抜止部６５が形成されている高さの範囲内にある。垂下部６３には、変形しやすいように縦溝６９が２カ所形成されている。また、垂下部６３の内壁上部には、軸体６２の抜止バネ部６８に対応して上に向かって開いたテーパ状のガイド部８６を形成している。アンカー本体６１をボード（型枠５１）に形成した穴に挿入すると、垂下部６３は弾性によって径を縮小しながら穴に進入し、抜止部６５が穴を貫通すると垂下部は弾性によりものと形状に復帰し、基板６４の背面と抜止部６５の間でボードを挟持してアンカー本体６１がボード（型枠５１）に固定される。更に４本のビス８４をボード（型枠５１）にねじ込んで強固に固定しているが、このねじは必須のものではない。
【００５１】
軸体６２は軸部分の外径がアンカー本体６１の内径とほぼ等しくなっており、上部に接合手段６７である雄ねじを有し、下部には矢印状の抜止バネ部６８を有する。抜止バネ部６８の矢印状の部分は内側に向かって弾性変形する。また、矢印状の部分の下には六角形状の回動手段８５が形成されている。軸体６２をアンカー本体６１に上方から差し込むと、矢印状の抜止バネ部６８が変形しながらアンカー本体内に進入し、抜止バネ部６８が段部６６を通過すると弾性によって元の形状に復帰して広がるので、軸体６２はアンカー本体６１から引き抜けない状態となる。軸体６２をアンカー本体６１に挿入することで、垂下部６３が確実に元の径に復帰し、アンカー本体６１がボード（型枠５１）から引き抜けることが防止される。アンカー本体６１及び軸体６２はボード（型枠５１）の片側（上側）から差し込んで固定できるので、取り付け作業がきわめて容易である。
【００５２】
スペーサ本体７０は下筋保持部材７５、上筋保持部材７６及び１本の支柱部材７７からなる。下筋保持部材７５はプラスチック製で、下筋保持部７１が２カ所外側に向かって張り出し形成されている。下筋保持部７１上には下主筋５３が支持され、その上にこれと直行する下配力筋５４が支持される。支柱部材７７と螺合するための金属ナット８０が、下筋保持部材７５内に形成されかつ下筋保持部材７５の側面に開口するナット装着部７８に側面から挿入され装着されている。金属ナット８０には支柱部材７７が螺着される。またその下に、軸体６２と接合するための金属ナット８３が、装着部７８と同様の装着部８２に装着され、金属ナット８３の雌ねじが接合部７４となっており、軸体６２の接合手段６７である上端の雄ねじと螺合する。
【００５３】
上筋保持部材７６はプラスチック製で、上筋保持部７２が１８０°反対側に２カ所、外側に向かって張り出し形成されている。上筋保持部７２の上には上配力筋５６が支持され、その上にこれと直行する上主筋５５が支持される。上筋保持部７２の上方には断面がエの字形の棒状の浮上防止手段７３が上筋保持部７２と直角の向きに設けられている。上筋（上主筋５５、上配力筋５６）に浮き上がる力が作用した場合、浮上防止手段７３が上主筋５５に当接し、上筋の浮き上がりが防止される。また、金属ナット８１が、上筋保持部材７６内に形成され、かつその側面に開口するナット装着部７９に側面から挿入され装着されている。金属ナット８１には支柱部材７７が螺着される。
【００５４】
支柱部材７７は両端に雄ねじを有するボルトで、下端の雄ねじを金属ナット８０に螺合することで下筋保持部材７５を取り付け、上端の雄ねじを金属ナット８１に螺合することで上筋保持部材７６を取り付ける。
【００５５】
次に、中空スラブ用スペーサ６０の好ましい組み立て順序の例を説明する。下筋保持部材７５には金属ナット８０、８３を、上筋保持部材７６には金属ナット８１を予め装着しておく。支柱部材７７の両端に金属ナット８０、８１を螺着して下筋保持部材７５及び上筋保持部材７６を取り付け、スペーサ本体７０を組み立てる。金属ナット８３には軸体６２を螺着し、軸体６２を下筋保持部材の下面に取り付ける。アンカー本体６１は型枠５１の穴に差し込んで取り付けておく。最後に、スペーサ本体７０の下面に取り付けてある軸体６２を型枠５１に取り付けてあるアンカー本体６１に差し込んで、スペーサ本体７０を型枠５１に固定する。このとき、軸体６２の矢印状の抜止バネ部６８は、垂下部６３の内壁上部に形成されたガイド部８６に沿って垂下部６３内に進入するので、容易に差し込むことができ、かつ、抜止バネ部６８が所定の方向を向くようにすることができる。
【００５６】
スラブ型枠上にコンクリートを打設し、硬化後型枠を解体する場合は、型枠の下側からスパナなどの工具で回動手段８５を回動し、軸体６２を取り除くと、型枠５１を取り除けるようになる。アンカー本体６１は型枠５１に取り付けられたままになっているので、このまま次の階のスラブ型枠として転用できる。下筋保持部材の接合部７４（この場合は金属ナット８３の雌ねじ）は天井インサート（天井、ダクト、照明器具などを吊り下げるためのインサート）として使用できる。
【００５７】
実施例４：
図１９〜２２は実施例のボード用アンカーと、これを用いた中空スラブ用スペーサ１５０に関し、図１９は中空スラブ用スペーサ１５０の一部を切欠して示す要部説明図、図２０はアンカー本体１５１の平面、一部切欠側面及び底面を示す説明図、図２１は軸体１６０の２側面及び底面を示す説明図、図２２は下筋保持部材１７０の平面、一部切欠側面及び底面を示す説明図である。
【００５８】
本実施例のボード用アンカーはアンカー本体１５１と軸体１６０からなる。アンカー本体１５１はプラスチック製で、平面形状が六角形の基板１５２とその下面から垂下形成された２個の垂下部１５４からなる。基板１５２は表裏貫通する貫通孔１５３を有する。貫通孔１５３の平面形状は、円形の対向する２端部を弓形に切り欠いたタイコ形である。垂下部１５４はその弓形の部分から垂下形成され、横断面形状も弓形であるが、下端に外側に向かって膨出する抜止部１５５が形成されている。基板１５２の上面には、ボードの穴に差し込むときに折り曲がり変形しやすいように切込１５６が形成され、貫通孔１５３のタイコ形の直線部分には、軸体１６１の抜止バネ部を押し込みやすいように、テーパ部１５８が形成され、更に外縁部には立上部１５７が設けられている。アンカー本体１５１をボード（型枠５１）に形成した穴に挿入すると、基板１５２は切込１５６で折れ曲がるように弾性変形し、対向する垂下部１５４は下端が相互に近づくように弾性変形しながら穴に進入し、抜止部１５５が穴を貫通すると基板及び垂下部は弾性によりものと形状に復帰し、基板１５２の背面と抜止部１５５の間でボードを挟持してアンカー本体１５１がボード（型枠５１）に固定される。
【００５９】
軸体１６０はプラスチック製で、円柱状をなし、上部に接合手段１６２（螺条）が形成され、下部には平面形状がタイコ形の抜止バネ部１６１が形成され、下端には六角形の回動手段１６５が形成されている。抜止バネ部１６１は縮めた状態でアンカー本体の貫通孔１５３をようやく通過できる形状と大きさを有し、垂下部の下方に突出すると弾発力によって開いて貫通孔１５３を通過不能となるとともに、垂下部の下部に係止して軸体が引き抜かれるのを防止する。抜止バネ部をこのようなタイコ形とすることで、抜止バネ部の垂下部に引っ掛かる面積と、軸体の耐引き抜き力が最大になる。なお、抜止バネ部１６１の上端に形成されている突起１６３は、図１９に示すように、抜止バネ部１６１の弾性復帰力によって垂下部１５４を外側に押し広げるためのもので、これによって、抜止部１５５はボード（型枠５１）の裏側に確実に引っ掛かり、アンカー本体が引き抜かれるのを防止する。また、軸体１６０の接合手段１６２（螺条）の下部には、目印１６４（縦溝）が１８０度反対側に２カ所設けられている。
【００６０】
本実施例におけるスペーサ本体は、下筋保持部材１７０、支柱部材１６７及び図示しない上筋保持部材からなる。上筋保持部材は前記の実施例３と同様のものの他、任意のものを使用できる。
【００６１】
下筋保持部材１７０はプラスチック製で、円柱状の筒状本体１７１の下端には六角形の底板部１７４が形成され、外周からは下筋保持部１７５が十字状に外側に向かってに４カ所張り出し形成されている。下筋保持部１７５上には下主筋５３が支持され、その上にこれと直行する下配力筋５４が支持される。筒状本体内部には六角柱状の中空のナット収納部１７２が形成され、その底部分にはボルト孔１７３が貫通している。収納部１７２内にはナット１６６（高ナット）が納められている。ナット１６６の上方からは支柱部材１６７を螺着し、下方からは軸体１６０を螺合する。したがって、ナット１６６は軸体を接合するための接合部である。また、ナット１６６の上部は下筋保持部材（１７０）の上部に突出して下筋（５３）の移動を制限するので、下筋を配筋する際に下筋が位置決めされ、配筋作業が容易となる。下面には、ボルト孔１７３の周囲に４５度ピッチで８個の目印突起１７７が突設されている。また、下筋保持部１７５の下部にはスリット１７６が形成され、図１９に示すように、下筋を下筋保持部に結束線１７８で結束できるようになっている。下筋を結束するためには、このようなスリットに限らず、穴や突起などを設けても良い。
【００６２】
下筋保持部材１７０には予めナット１６６を装着しておき、これに下側から軸体１６０を螺着する。このとき、目印１６４と目印突起１７７を合わせることで、下筋保持部材と軸体の位置合わせが行われる。その後、下筋保持部材を型枠５１に取り付けてあるアンカー本体１５１に、軸体１６０を差し込んで取り付ける。このとき、軸体１６０の抜止バネ部１６１はアンカー本体１５１の貫通孔１５３と同じタイコ形で、しかも、バネを縮めてようやく通過できる大きさなので、軸体とアンカー本体の位置（角度）合わせは自動的になされる。また、下筋保持部材１７０の六角形の底板部１７４はアンカー本体１５１の基板１５２の立上部１５７の内周に嵌合するので、下筋保持部材１７０を回転して角度調整したときに、アンカー本体１５１も共に回転し、軸体とアンカー本体の位置（角度）関係が変化しないので、軸体の耐引き抜き強度が低下しない。下筋保持部材とアンカー本体を共に回転させるためには、このような構成の他に、接触面を凹凸嵌合にするなど種々の構成を用いることができる。
【００６３】
このようにして下筋保持部材１７０を型枠に取り付けた後に、下筋配筋、ボイド設置、支柱・上筋保持部材・浮上防止手段の取り付け、上筋配筋を行う。型枠解体後、アンカー本体１５１は型枠に取り付けたままで他の階の型枠として転用でき、ナット１６６は天井インサートとして利用できるのは前記の実施例３と同様である。
【００６４】
実施例５：
図２３〜図２７は本発明の実施例のボード用アンカー９０と、これを用いた中空スラブ用スペーサに関し、図２３は一部を切り欠いて示す中空スラブ用スペーサの要部説明図、図２４はボード用アンカー９０の取り付け状態の平面説明図、図２５はアンカー本体９１の側面図、図２６は図２５におけるＡＡ線断面図、図２７はパッキン材９４の底面図である。
【００６５】
本実施例のボード用アンカー９０はアンカー本体９１とパッキン材９４からなる。アンカー本体９１はプラスチック製で、概略円筒状をなし、上下方向に貫通するボルト孔９２を有する。内部には金属ナット１００がインサート成形により組み込まれており、これによって、ボルト孔９２は螺条を有している。側面にはボード（型枠５１）が嵌合する三日月形状の嵌合溝９３と、パッキン部材９４の突起９７が係合する凹部９８が形成されている。パッキン材９４はゴム、軟質プラスチックなどの弾性体で形成することが望ましく、三日月形状をなし、ボード（型枠５１）とアンカー本体９１の間に填め込み、隙間を閉塞するもので、外れにくいように突起９５、９６、９７が設けられている。また、底面には、容易に填め込めるように溝９９が設けられている。
【００６６】
ボード用アンカー９０をボード（型枠５１）に取り付ける際は、まず、アンカー本体９１をボード（型枠５１）に形成した円形穴５７に差し入れた後、横（水平）方向に移動して嵌合溝９３に前記円形穴５７の周囲の部分のボードを嵌合し、アンカー本体９１をボードに保持せしめる。更に、ビス１０７で固定すれば万全であるが、ビス止めは必須ではない。アンカー本体９１を横方向に移動すると、円形穴５７の一部に三日月形の隙間が発生するので、この隙間にパッキン材９４を填め込み、閉塞する。パッキン材を填め込むことによって、ボード用アンカー９０が型枠に固定される。
【００６７】
図２３のスペーサ本体１０１は、下筋保持部１０３を有する下筋保持部材１０２と、上筋保持部及び上筋浮上防止手段を有する上筋保持部材（図示せず）と、下筋保持部材と上筋保持部材を連結する支柱部材１０４とを有する。上筋保持部材は、例えば前記の実施例と同じものを用いることができる。下筋保持部材１０２はプラスチック製で、図２９に示すように、下筋保持部１０３が１カ所、脚部１０８が２カ所、外方向に張り出し形成されている。内部には高ナット１０５がインサート成形によって組み込まれており、これにより下筋保持部材１０２は上下方向に貫通し内部に螺条を有するボルト孔を有している。
【００６８】
支柱部材１０４は両端に雄ねじを有するボルトで、下端の雄ねじを高ナット１０５に螺合することで下筋保持部材１０２を取り付ける。下端の雄ねじの根元には外周に溝を形成して脆弱にした破断部１０６が設けられている。ボルトの下端は下筋保持部材１０２の底面から突出している。その突出部分を型枠に取り付けたボード用アンカー９０の金属ナット１００に螺合し、図２３に示すように型枠５１に固定する。このとき破断部１０６の位置は下筋保持部材１０２の内部（ボルト孔の内部）にあることが望ましい。
【００６９】
参考例：
図２８に示す参考例は、実施例５とボード用アンカーが異なるものである。また支柱部材１０４’の破断部１０６’が下端の雄ねじの途中に設けられている点で異なり、その他のスペーサ本体１０１’の構成は実施例５と同じである。ボード用アンカー１１０はプラスチック製で、筒状をなし、上部に基板１１１が設けられ、下端外周に抜止部１１２が突出形成されている。内部は上下に貫通し螺条を有するボルト孔となっている。ボード用アンカー１１０は型枠５１に開けた穴に上から押し込むことで型枠に固定される。なお、ボード用アンカーはボルト孔を有し型枠に固定できるものであれば何でもよい。支柱部材１０４’の下端は下筋保持部材１０２の底面から突出している。その突出部分を型枠に取り付けたボード用アンカー１１０のボルト孔に螺合し、図２８に示すように型枠５１に固定する。このとき破断部１０６’の位置は下筋保持部材１０２の内部（ボルト孔の内部）にあることが望ましい。
【００７０】
実施例５及び参考例において、スラブ型枠上にコンクリートを打設し、硬化後型枠を解体する場合は、型枠の下側から適宜の工具で支柱部材１０４、１０４’の下端の突出している部分を回動すると、破断部１０６、１０６’が破断してそれより下の部分を抜き取ることができ、型枠５１を取り除けるようになる。ボード用アンカー９０、１１０は型枠５１に取り付けられたままになっているので、このまま次の階のスラブ型枠として転用できる。ボード用アンカー９０、１１０及び高ナット１０５のボルト孔は天井インサート（天井、ダクト、照明器具などを吊り下げるためのインサート）として使用できる。
【００７１】
実施例６：
図３０に示すのは、スラブ下面に断熱材５２を打ち込む（型枠５１の上に断熱材５２が設けられる）場合に用いる中空スラブ用スペーサ２１’である。この場合のボード用アンカーは、型枠と断熱材の複合ボードに用いる実施例６のボード用アンカーであり、アンカー本体２２’と軸体２３’からなる。スペーサ本体３２は前記の実施例２と同じである。このボード用アンカーは実施例２のボード用アンカーとは若干異なっている。すなわち、アンカー本体２２’と軸体２３’が断熱材５２の厚みの分だけ長く形成されており、軸体２３’に破断部３０が設けられると共に、アンカー本体２２’の垂下部６’にも外周面に設けた溝で脆弱となっている破断部３１が設けられている。破断部３０、３１の位置は、型枠５１と断熱材５２の境目付近とするのがよい。アンカー本体２２’及び軸体２３’のその他の構成は前記の実施例２と同じである。型枠を解体する場合は、型枠の下側からスパナなどの工具で回動手段５０を回動する。すると、破断部３０で軸体２３’が折れ、アンカー本体２２’の下の部分も供回りして破断部３１で垂下部６’が折れ、軸体２３’及びアンカー本体２２’の破断部３０、３１から下側の部分を取り除くことができ、型枠５１を取り除けるようになる。型枠５１を取り除くと、断熱材５２がスラブの下面に打ち込まれた状態で残る。この場合、垂下部は基板の非円形の貫通孔の周囲から垂下形成されているので、軸体２３’の軸部分と垂下部６’の間には隙間が生じ、したがって、断熱材５２部分に僅かな空間が存在することとなり、スラブの断熱性能が若干低下する。
【００７２】
実施例７：
図３１〜３３は実施例７のボード用アンカーに関し、図３１はボード用アンカーの一部を切欠して示す説明図、図３２はアンカー本体１２０の説明図、図３３は軸体１２１の説明図である。
【００７３】
本実施例のボード用アンカーも、スラブに断熱材５２を打ち込む（型枠５１の上に断熱材５２が設けられる）場合に用いるものである。アンカー本体１２０は、基板１３０と垂下部１２２からなり、円板状の基板１３０は表裏貫通する円形の貫通孔１３１が形成され、その周囲から円筒状の垂下部１２２が垂下形成されている。垂下部１２２の下端には、外側に向かって膨出する抜止部１２４が形成されている。垂下部１２２は上部は肉薄の筒状で、下部１２３は円柱を中央でくり抜いたような切欠部１２８によって２つ割れとなっており、その隙間ｄは上部の内径よりも小さくなっている。また、垂下部１２２内面の上部の最下部にストッパ受部１２６が形成されている。これは、軸体１２１のストッパ１３７に対応するものである。垂下部１２２の外周面には溝により脆弱となっている破断部１２５、粗面の一態様である突条１２９が形成されている。垂下部１２２の下面にはストッパ突起１２７が設けられている。
【００７４】
軸体１２１は共に円柱状の上部軸１３２及び下部軸１３３を有し、上端に接合手段１３６、下端に下頭部１３４が形成され、下頭部１３４の下面には回動手段１３５が設けられている。下頭部１３４及び接合手段１３６は前記の実施例２の下頭部２８及び接合手段２９と同様のものである。上部軸１３２の外径はアンカー本体の垂下部１２２の上部の内径にほぼ等しく、下部軸１３３の外形は垂下部の下部１２３の隙間ｄとほぼ等しくなっている。下部軸１３３の上部にはストッパ１３７が１８０°反対側に２カ所突出形成され、その上の上部軸との境目に脆弱部１３８が形成されている。
【００７５】
アンカー本体１２０は、ボード（型枠５１及び断熱材５２）に開けた円形の穴に上部から差し込んで固定する。軸体１２１は、例えば実施例２と同じスペーサ本体３２に取り付け、アンカー本体１２０の貫通孔１３１、垂下部１２２に差し込み、９０°回転する。このとき、ストッパ１３７はストッパ受部１２６に当接し、下頭部１３４の外端がストッパ突起１２７に当接して回転が停止する。破断部１２５、１３８は共に型枠５１と断熱材５２の境目付近に位置する。上部軸１３２の外径はアンカー本体の垂下部１２２の上部の内径にほぼ等しいので、間に隙間はほとんどできず、断熱材５２部分に空間が生じないので、断熱性能が低下しない。
【００７６】
型枠を解体する場合は、型枠の下側からスパナなどの工具で回動手段１３５を回動する。すると、ストッパ１３７が前記ストッパ受部１２６に当接し、また、下頭部１３４の外端がストッパ突起１２７に当接しているために、下部軸１３３と共に垂下部１２２の下部１２３が回転し、破断部１３８、１２５が破断して下部軸１３３と垂下部１２２の下部１２３を取り除き、型枠５１を取り外せるようになる。型枠５１を取り外すと、断熱材５２がスラブの下面に打ち込まれた状態で残る。
【００７７】
【発明の効果】
本発明の中空スラブ用スペーサは、例えば図３４、３５に示されるように、中空スラブの配筋に利用することができる。直行する２方向の上筋５５、５６及び下筋５３、５４で形成される四角形のマスの中に発泡スチロール製のボイド１４０が配置される。ボイド１４０は、図３６に示すように、繭玉形状をなし、貫通筋１４１で複数個を連結一体化している。貫通筋１４１は上配力筋５６の下側に結束固定されてボイド１４０が支持される。スラブ型枠上にコンクリートを打設すると、ボイド１４０はコンクリートに比べて著しく軽いために大きな浮力が生じるが、上筋（５５、５６）を介してスラブスペーサの浮上防止手段によって、浮き上がりが防止される。スラブスペーサは本発明のボード用アンカーによって型枠に固定されているから、上下の配筋全体が浮き上がることもない。
【００７８】
本発明において、ボード用アンカーはボードの片側（型枠の上側）からの作業のみで型枠などのボードに強固に取り付けることができるので取り付け作業がきわめて簡単である。軸体の上部に浮き上がり防止手段を設けることで、中空スラブ用緊結具となる。また、中空スラブ用緊結具又は中空スラブ用スペーサに利用した場合、スラブ型枠の解体に際しては、軸体をねじ切るなどして一部材を取り除くのみで、容易に型枠を解体できる状態にできる。
【図面の簡単な説明】
【図１】実施例の中空スラブ用緊結具１の一部を切欠して示す説明図である。
【図２】アンカー本体２の斜視図である。
【図３】アンカー本体２を型枠５２に挿入する説明図である。
【図４】軸体３の斜視図である。
【図５】中空スラブ用スペーサ２１の一部を切欠して示す説明図である。
【図６】アンカー本体２２の斜視図である。
【図７】軸体２３の斜視図である。
【図８】上筋保持部材３８の側面説明図である。
【図９】下筋保持部材３７の斜視図である。
【図１０】アンカー本体２２と下筋保持部材３７を接合した状態の斜視図である。
【図１１】アンカー本体２２と下筋保持部材３７を接合した状態の斜視図である。
【図１２】中空スラブ用スペーサ６０の一部を切欠して示す説明図である。
【図１３】アンカー本体６１の平面、側面及び底面を示す説明図である。
【図１４】軸体６２の底面図である。
【図１５】下筋保持部材７５の正面と側面を示す説明図である。
【図１６】下筋保持部材７５の平面図である。
【図１７】上筋保持部材７６の正面と側面を示す説明図である。
【図１８】上筋保持部材７６の底面図である。
【図１９】中空スラブ用スペーサ１５０の一部を切欠して示す要部説明図である。
【図２０】アンカー本体１５１の平面、一部切欠側面及び底面を示す説明図である。
【図２１】軸体１６０の２側面及び底面を示す説明図である。
【図２２】下筋保持部材１７０の平面、一部切欠側面及び底面を示す説明図である。
【図２３】スペーサ本体１０１の要部とボード用アンカー９０の一部を切り欠いて示す説明図である。
【図２４】ボード用アンカー９０の取り付け状態の平面説明図である。
【図２５】アンカー本体９１の側面図である。
【図２６】図２５におけるＡＡ線断面図である。
【図２７】パッキン材９４の底面図である。
【図２８】スペーサ本体１０１’の要部とボード用アンカー１１０の一部を切り欠いて示す説明図である。
【図２９】下筋保持部材１０２の平面説明図である。
【図３０】中空スラブ用スペーサ２１’の一部を切欠して示す説明図である。
【図３１】ボード用アンカーの一部を切欠して示す説明図である。
【図３２】アンカー本体１２０の説明図である。
【図３３】軸体１２１の説明図である。
【図３４】スラブスペーサ２１を用いた中空スラブの例を示す平面説明図である。
【図３５】図３４における断面説明図である。
【図３６】ボイド１４０の例を示す平面及び側面説明図である。
【符号の説明】
１ 中空スラブ用緊結具
２ アンカー本体
３ 軸体
４ 基板
５ 貫通孔
６ 垂下部
７ 抜止部
８ 切込
９ ストッパ受部
１０ 立上部
１１ 下頭部
１２ 浮上防止手段
１３ 円板部
１４ ストッパ
１５ 回動手段
１６ 破断部
２１ 中空スラブ用スペーサ
２２ アンカー本体
２３ 軸体
２４ 基板
２５ 貫通孔
２６ 垂下部
２７ 抜止部
２８ 下頭部
２９ 接合手段
３０ 破断部
３１ 破断部
３２ スペーサ本体
３３ 下筋保持部
３４ 上筋保持部
３５ 浮上防止手段
３６ 接合部
３７ 下筋保持部材
３８ 上筋保持部材
３９ 支柱部材
４０ ナット装着部
４１ ナット装着部
４２ 金属ナット
４３ 金属ナット
４４ 挿入口
４５ 回転空所
４６ 位置決め片
４７ 位置決め突起
４８ 位置決め突起
４９ 切込
５０ 回動手段
５１ 型枠
５２ 断熱材
５３ 下主筋
５４ 下配力筋
５５ 上主筋
５６ 上配力筋
５７ 円形穴
５８ ストッパ片
５９ ストッパ突起
６０ 中空スラブ用スペーサ
６１ アンカー本体
６２ 軸体
６３ 垂下部
６４ 基板
６５ 抜止部
６６ 段部
６７ 接合手段
６８ 抜止バネ部
６９ 縦溝
７０ スペーサ本体
７１ 下筋保持部
７２ 上筋保持部
７３ 浮上防止手段
７４ 接合部
７５ 下筋保持部材
７６ 上筋保持部材
７７ 支柱部材
７８ ナット装着部
７９ ナット装着部
８０ 金属ナット
８１ 金属ナット
８２ ナット装着部
８３ 金属ナット
８４ ビス
８５ 回動手段
８６ ガイド部
９０ ボード用アンカー
９１ アンカー本体
９２ ボルト孔
９３ 嵌合溝
９４ パッキン材
９５ 突起
９６ 突起
９７ 突起
９８ 凹部
９９ 溝
１００ 金属ナット
１０１ スペーサ本体
１０２ 下筋保持部材
１０３ 下筋保持部
１０４ 支柱部材
１０５ 高ナット
１０６ 破断部
１０７ ビス
１０８ 脚部
１１０ ボード用アンカー
１１１ 基板
１１２ 抜止部
１２０ アンカー本体
１２１ 軸体
１２２ 垂下部
１２３ 垂下部の下部
１２４ 抜止部
１２５ 破断部
１２６ ストッパ受部
１２７ ストッパ突起
１２８ 切欠部
１２９ 突条
１３０ 基板
１３１ 貫通孔
１３２ 上部軸
１３３ 下部軸
１３４ 下頭部
１３５ 回動手段
１３６ 接合手段
１３７ ストッパ
１３８ 破断部
１４０ ボイド
１４１ 貫通筋
１５０ 中空スラブ用スペーサ
１５１ アンカー本体
１５２ 基板
１５３ 貫通孔
１５４ 垂下部
１５５ 抜止部
１５６ 切込
１５７ 立上部
１５８ テーパ部
１６０ 軸体
１６１ 抜止バネ部
１６２ 接合手段
１６３ 突起
１６４ 目印
１６５ 回動手段
１６６ ナット（接合部）
１６７ 支柱部材
１７０ 下筋保持部材
１７１ 筒状本体
１７２ ナット収納部
１７３ ボルト孔
１７４ 底板部
１７５ 下筋保持部
１７６ スリット
１７７ 目印突起
１７８ 結束線[0001]
BACKGROUND OF THE INVENTION
The present invention is a board anchor that is fixed to a board such as a mold for attaching various devices to the board such as a mold, and a spacer that is attached to the mold using the board, and particularly a hollow slab rebar. The present invention relates to a hollow slab spacer for positioning at a predetermined position.
[0002]
[Prior art]
Japanese Patent No. 331340 discloses a slab spacer for a hollow slab that is used for both the lower and upper muscles. This has a support base that holds the lower bar, two support columns that are erected from now on, and a support part that holds the upper bar provided on the upper part of the support column, and after the support base is attached to the mold The lower bar is arranged, the column is then attached to the support base, the hook is bent to fix the column, the upper bar is then arranged, the bent part is bent, and the upper bar is fixed. Since this slab spacer fixes the upper line to prevent the slab spacer from being lifted up, a special void lift prevention tool for preventing the voids forming the hollow portion of the slab from being lifted from the concrete due to buoyancy (see Japanese Utility Model Sho 62- No. 4103, JP-A-11-107527, JP-A-2000-192654, etc.), and the slab spacer is excellent in that it also serves as a void lift prevention tool.
[0003]
[Problems to be solved by the invention]
However, the slab spacer of Japanese Patent No. 331340 has the following problems.
(1) Since the two struts are integrated, the structure is complicated and the manufacturing cost is high.
{Circle around (2)} Since the latching portion has to be bent in order to fix the column to the support base, it is cumbersome and the work efficiency is poor. Moreover, the fixing of the column was likely to be insufficient.
(3) Since the bent part has to be bent to fix the upper line, it is complicated and the work efficiency is poor. Also, the upper muscle was likely to be insufficiently fixed.
[0004]
Moreover, in Japanese Utility Model Publication No. 62-4103, a means for fixing the void lifting prevention tool to the formwork is disclosed, but in this means, it is necessary to remove both the stud bolt and the nut when the formwork is disassembled. It was troublesome.
[0005]
The present invention can be manufactured inexpensively with a simple structure, and when fixed to a mold, it is not necessary to work at the top and bottom at the same time, it can be easily fixed only from the top, and one part can be removed at the time of disassembly of the mold An object of the present invention is to develop a finished board anchor, a binding tool for a hollow slab using the same, and a slab spacer.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, the retaining portion (7, 27) bulges outward from the periphery of the through hole on the back surface of the substrate (4, 24) having the non-circular through hole (5, 25) penetrating the front and back. ) At the lower end of the anchor body (2, 22) with a hanging part (6, 26) suspended, and can be inserted into the through hole (5, 25) and the hanging part (6, 26) and rotated by a predetermined angle. It consists of a shaft (3, 23) with a non-circular lower head (11, 28) at the lower end that cannot be pulled out, and the anchor body (2, 22) is inserted into a hole formed in the board. Then, the anchor body (2, 22) is fixed to the board by sandwiching the board between the back surface of the substrate (4, 24) and the retaining portion (7, 27), and the shaft is fixed to the anchor body (2, 22). By inserting the body (3, 23) and rotating it by a predetermined angle, the lower head (11, 28) There is an anchor board characterized by comprising a non pull engages the lower end of the hanging portion (6, 26). Since the anchor body can be fixed to the board by simply inserting it into the board from one side, the fixing work to the board is very simple. Since the shaft body may be inserted into the through hole of the anchor body and rotated by a predetermined angle, the shaft body mounting operation is very simple.
[0007]
The invention according to claim 2 of the present application is the board anchor according to claim 1, wherein an outer peripheral surface of the hanging portion (6, 26) is formed into a rough surface. Here, the rough surface refers to a surface on which fine unevenness, slightly large unevenness, ridges, grooves, etc. are formed and friction is increased. Since the outer surface of the hanging portion is a rough surface, the friction between the anchor body and the board is increased, and the anchor body can be prevented from rotating together when the shaft is rotated by a predetermined angle.
[0008]
The invention according to claim 3 of the present application is the board anchor according to claim 1 or 2, wherein the two hanging parts (6, 26) are formed to face each other, and the opposed hanging parts (6, 26) When closed so as to eliminate the gap at the lower end, the board anchor is characterized in that the outer diameter of the retaining portion (7, 27) at the lower end becomes substantially equal to the hole diameter of the board. If comprised in this way, the protrusion amount of the securing part of a drooping lower end can be maximized, and the extraction strength of an anchor becomes the maximum.
[0009]
The invention of claim 4 of the present application comprises a drooping portion (63) and a substrate (64) formed at the upper end thereof, and a retaining portion (65) bulging outward is formed at the lower end of the drooping portion (63). An anchor body (61) formed on the inner wall of the hanging part (63) is formed with a step part (66) in which the lower part has an inner diameter larger than the upper part, and an arrow-shaped retaining spring part (68) is formed on the lower part. When the anchor body (61) is inserted into a hole formed in the board, the anchor body (61) is sandwiched between the back surface of the substrate (64) and the retaining portion (65). ) Is fixed to the board, and when the shaft body (62) is inserted into the anchor main body (61), the retaining spring portion (68) engages with the step portion (66) and cannot be pulled out. The board anchor. Since the anchor body can be fixed to the board by simply inserting it into the board from one side, the fixing work to the board is very simple. Since the shaft body only needs to be inserted into the anchor main body, the shaft body can be easily attached. The inner wall of the hanging portion is pressed outward by the retaining spring portion, and the retaining portion is securely engaged with the back side of the board. If the drooping portion is formed with a vertical groove, it becomes easy to deform and can be easily inserted into the hole of the board.
[0010]
According to a fifth aspect of the present invention, in the board anchor of the fourth aspect, a tapered guide portion (86) is formed on the inner wall upper portion of the hanging portion (63) corresponding to the retaining spring portion (68). When the shaft body (62) is inserted into the anchor body (61), the guide portion (86) serves as a guide so that the shaft body (62) can be easily inserted in a predetermined direction. Is an anchor for boards. By providing the guide portion, the shaft body can be easily inserted, and the shaft body can be aligned in a predetermined direction.
[0011]
The invention according to claim 6 of the present application is based on the arcuate portion of the back surface of the substrate (152) having a through-hole (153) that penetrates the front and back sides and has a circular-shaped through hole (153) in which two opposite ends of the circular shape are cut out in an arcuate shape. An anchor body (151) having a hanging portion (154) having a retaining portion (155) that bulges outward and having a lower end formed in a hanging manner, and an arrow-shaped retaining spring portion (161) in the lower portion. When the anchor main body (151) is inserted into a hole formed in the board, the anchor body (151) is sandwiched between the back surface of the substrate (152) and the retaining portion (155). ) Is fixed to the board, and when the shaft body (160) is inserted into the through hole (153) of the anchor body (151), the retaining spring part (161) is opened under the drooping portion and cannot be pulled out. Become Bo The anchor spring portion (161) has a flat shape in the shape of the tie, and can pass through the through hole (153) in the contracted state, and can be pulled out by being hooked on the hanging portion in the released state. It is an anchor for boards that is impossible. By making the shape of the through hole of the anchor main body a Tyco shape, the retaining portion of the hanging portion can be maximized, and the pull-out force is increased. When the shape of the retaining spring portion of the shaft body is also a Tyco shape, the pulling-out force is increased.
[0012]
The invention according to claim 7 of the present application is the board anchor according to any one of claims 1 to 6, wherein a breakage portion (16, 30) formed weakly on the shaft of the shaft body is provided. It is an anchor. This anchor is particularly suitable when the board is a formwork. When the formwork is removed after the concrete is hardened, the shaft body is broken by rotating the shaft body from the back surface of the formwork, and the lower head or The lower part of the shaft body including the retaining spring part can be removed, and the mold can be removed. That is, since the formwork can be removed by removing one member, the operation becomes very simple.
[0013]
The invention of claim 8 of the present application has a substantially cylindrical shape having a bolt hole (92) penetrating in the vertical direction and having an internal thread on the inner periphery, and having a crescent-shaped fitting groove (93) into which the board is fitted on the side surface. An anchor main body (91) having a shape, and the anchor main body (91) are inserted into a circular hole (57) formed in the board, and then moved in the lateral direction so that the circular hole (57) is inserted into the fitting groove (93). It is characterized by comprising a crescent-shaped packing material (94) that closes a gap with a circular hole (57) generated when the board of the surrounding portion is fitted and the anchor body (91) is held on the board. It is an anchor for the board to do. Since the anchor body can be fixed to the board by inserting the anchor body into the board from one side and moving sideways to fit the packing material, the fixing work to the board can be done only on one side and is extremely simple.
[0014]
The invention according to claim 9 of the present application is the board anchor according to claim 8, wherein the bolt hole (92) has a female screw, and the female screw is formed by a metal nut (100) attached to the anchor body (91). It is the board anchor characterized by the above. Since the female screw is a metal, the attachment strength when various equipments are screwed onto the female screw and attached is increased. The main body can be manufactured at low cost by being made of plastic.
[0015]
The invention according to claim 10 of the present application is provided with a floating prevention means (12) for preventing the reinforcing bars and / or voids from rising above the shaft (3) of the board anchor according to any one of claims 1 to 7. This is a binding tool for hollow slabs. By providing a floating prevention means at the upper part of the shaft body, the board anchor can be used as a hollow slab binding tool for tightly connecting a void of the hollow slab (a core for forming the hollow portion) to prevent the floating. The pull-out force of the board anchor can counter the buoyancy of reinforcing bars and voids. As the floating prevention means, various known means such as a hook-like formation method, a clamping method, a bolt fixing method, and the like can be used.
[0016]
The invention of claim 11 of the present application is characterized in that a shaft body having a lifting prevention means for preventing the reinforcing bars and / or voids from floating up is screwed into the bolt hole of the board anchor of claim 8 or 9. It is a binding tool for hollow slabs. In this case as well, the board anchor can be used as the binding tool for the hollow slab as in the invention of the tenth aspect.
[0017]
The invention of claim 12 of the present application includes a reinforcing bar holding portion that holds the upper and / or lower bars at a predetermined height position, and a floating prevention means (35, 73) that prevents the reinforcing bars and / or voids from rising. The board spacer according to claim 1, comprising the spacer body (32, 70) and the shaft body (23, 62) having an arbitrary joining means (29, 67) on the upper part, and the spacer The main body (32, 70) is a hollow slab spacer characterized by having joint portions (36, 83) that can be joined to the joint means (29, 67) of the shaft bodies (23, 62). By providing a joining means at the upper part of the shaft body and joining the joined part at the lower part of the spacer body to this, the spacer body can be joined to the board anchor and used as a hollow slab spacer. The pull-out force of the board anchor can counter the buoyancy of reinforcing bars and voids. The structure of a joining means and a junction part is arbitrary.
[0018]
The invention of claim 13 of the present application is a spacer main body (32) having a lower muscle holding portion (33, 71), an upper muscle holding portion (34, 72), and a floating prevention means (35, 73) for preventing the upper muscle from being lifted. , 70) and the board anchor according to any one of claims 1 to 7, wherein the spacer body (32, 70) can be joined to the joining means (29, 67) of the shaft body (23, 62). It is a spacer for hollow slabs which has a part (36, 74). The lower and upper muscle holding parts can hold the lower and upper muscles at a predetermined height and have anti-lifting means to prevent the upper muscles from rising, so the void should be connected to the upper muscles. In this case, the void can be prevented from being lifted by buoyancy.
[0019]
According to a fourteenth aspect of the present invention, in the spacer according to the thirteenth aspect, the spacer body (32, 70) includes a lower bar holding member (37, 75) having a lower bar holding part (33, 71) and an upper bar holding. An upper muscle holding member (38, 76) having a portion (34, 72) and an upper muscle floating prevention means (35, 73), a lower muscle holding member (37, 75), and an upper muscle holding member (38, 76). A strut member (39, 77) to be connected, and the strut member (39, 77) is a bolt in which a male screw is formed on the upper and lower ends, and the male screw at the lower end of the strut member (39, 77) A hollow slab spacer characterized by being screwed into a female screw formed on a muscle holding member (37, 75) and a male screw at an upper end screwed into a female screw formed on the upper muscle holding member (38, 76). . Since the spacer main body has the above-described configuration, the lower bar holding member and the upper bar holding member can be made of plastic, and the strut member can use commercially available bolts having screws at both ends, so the spacer main body can be inexpensive and easy. Can be manufactured.
[0020]
According to a fifteenth aspect of the present invention, in the spacer according to the fourteenth aspect, the internal threads of the lower muscle holding member (37, 75) and the upper muscle holding member (38, 76) are the lower muscle holding member (37, 75) and A nut mounting portion (40, 78, 41, 79) formed on the upper muscle holding member (38, 76) and opened to the side surfaces of the lower muscle holding member (37, 75) and the upper muscle holding member (38, 76). A hollow slab spacer characterized by being a female screw of a metal nut (42, 80, 43, 81) inserted and mounted in a). The lower bar holding member and upper bar holding member can be made of plastic, and a female screw can be formed simply by fitting a metal nut. Therefore, the manufacturing is inexpensive and easy, and the female screw is made of metal, so the strength is high. Become.
[0021]
The invention according to claim 16 of the present application is the spacer according to any one of claims 12 to 15, wherein the joining means (29) of the shaft body (23) is a non-circular upper head, and the joining portion ( 36) is a non-circular insertion port (44) formed in the lower surface of the spacer body (32) and a rotation space (45) of the flange, and the upper part of the shaft body (23) is connected to the spacer body (32). The hollow slab spacer is characterized in that the upper head cannot be pulled out by being inserted into the rotary cavity (45) through the insertion opening (44) and rotated by a predetermined angle. If comprised in this way, joining of a shaft body and a spacer main body will become easy.
[0022]
According to the invention of claim 17 of the present application, in the spacer of claim 16, a positioning piece (46) is provided on the lower surface of the spacer body (32), and a positioning protrusion (47,) is provided on the upper surface of the substrate (24) of the anchor body (22). 48), and when the spacer main body (32) and the anchor main body (22) are relatively rotated by a predetermined angle, the positioning piece (46) engages with the positioning protrusions (47, 48) and the spacer main body (32) The hollow slab spacer is characterized in that the anchor body (22) is relatively positioned and the rotation is restricted. If comprised in this way, a shaft and a spacer main body will be positioned, and it can prevent that a shaft and a spacer main body will separate carelessly.
[0023]
The invention according to claim 18 of the present application is the spacer according to claim 16 or 17, wherein a stopper piece (58) is formed on the shaft (23) and a stopper protrusion (59) is formed on the lower surface of the spacer body (32). When the shaft body (23) and the spacer body (32) are relatively rotated by a predetermined angle, the stopper piece (58) contacts the stopper projection (59) and the shaft body (23) and the spacer body (32) The hollow slab spacer is characterized in that its relative rotation is restricted. If comprised in this way, when attaching a shaft body to a spacer main body previously, since rotation stops when it rotates a predetermined angle, a shaft body can be reliably attached to a spacer main body.
[0024]
The invention according to claim 19 of the present application includes a lower body holding member (170), an upper muscle holding member and a spacer main body having a floating prevention means for preventing the upper muscle from rising, and a thread as a joining means (162) on the upper part. The board anchor according to claim 6 having the shaft body (160), wherein the lower muscle holding member (170) can be joined to the joining means (162) of the shaft body (160). A spacer for a hollow slab having the joint body (162) of the shaft body (160) and the joint portion (166) of the lower muscle holding member (170). The hollow slab spacer is characterized by being integrated with the muscle holding member, and when one of them is rotated, the other rotates together. When the lower bar holding member is joined to the board anchor and then rotated to adjust the direction of the lower bar holding member, the board anchor rotates together, so the shaft body (prevention spring part) and the anchor body The positional relationship does not change, and it is possible to prevent the pull-out strength of the shaft body from weakening.
[0025]
The invention according to claim 20 of the present application is the hollow slab according to claim 19, wherein the shaft body (160) and the lower muscle holding member (170) are provided with marks for mutual alignment. Spacer. By matching the marks of the shaft body and the lower muscle holding member, when the shaft body and the lower muscle holding member are joined, the shaft body and the lower muscle holding member can be easily joined in the correct positional relationship.
[0026]
The invention according to claim 21 of the present application is the spacer according to claim 19 or 20, wherein the joint (166) is a nut attached to the lower reinforcement holding member (170), and an upper portion of the nut is the lower reinforcement holding member. A hollow slab spacer that protrudes above the upper portion of (170) and restricts the movement of the lower reinforcement (53). Since the movement of the lower muscle is restricted, it is difficult for the lower muscle to come off the predetermined position during the lower muscle arrangement, and the arrangement work becomes easy.
[0027]
The invention according to claim 22 of the present application is the spacer according to claim 14, 15, 19, 20 or 21, wherein the lower muscle holding member is capable of binding with the lower muscle. It is. When the void and the lower muscle are combined and the buoyancy of the void acts on the lower muscle, the lower muscle can be prevented from floating by binding the lower muscle to the lower muscle holding portion.
[0028]
The invention according to claim 23 of the present application includes a spacer main body (101) having a lower muscle holding portion (103) and an upper wire holding portion and a floating prevention means for preventing the upper wire from lifting, and a bolt projecting from the lower surface. A hollow slab spacer comprising 8 or 9 board anchors, wherein the bolts of the spacer body (101) are screwed into the bolt holes of the board anchors. Only by screwing the bolts of the spacer main body into the bolt holes of the anchor main body, the spacer main body can be attached to the anchor main body, and the board anchor can be easily used as the spacer for the hollow slab.
[0029]
According to a twenty-fourth aspect of the present invention, in the spacer according to the twenty-third aspect, the spacer main body (101) includes a lower-strand holding member (102) having a lower-strut holding section (103), an upper-stretch holding section, and an upper-stretching prevention. A bolt having an upper bar holding member having means, a lower bar holding member (102), and a column member (104) for connecting the upper bar holding member, wherein the column member (104) is formed with male threads at upper and lower ends. The male screw at the lower end of the support member (104) is screwed to the female screw of the lower muscle holding member (102), and the lower end of the support member (104) protrudes downward from the lower surface of the lower muscle holding member (102). The hollow slab spacer is characterized in that a male screw at the upper end is screwed onto a female screw of the upper muscle holding member. The lower bar holding member and the upper bar holding member can be made of plastic, and since the strut member can use commercially available bolts having screws at both ends, the spacer main body can be manufactured inexpensively and easily.
[0030]
In the present invention, A rupture part is provided in the column member. By When the lower part of the column member is rotated to break the fracture part and the lower part of the column member is removed, the internal thread of the lower muscle holding member can be used as an anchor for suspending the ceiling foundation, electrical appliances, air conditioning ducts, etc. There is no need to install such a ceiling anchor.
[0031]
Claim 2 of the present application 5 The board anchor according to claim 7 is used for a board in which the board anchor is a composite of a formwork (51) and a heat insulating material (52) provided thereon, and the hanging part (6 A board anchor characterized in that a fractured part (31) formed weakly is provided in '). By rotating the lower part of the drooping part to break and remove the fractured part, the mold can be removed. In addition, Claims 1-2 4 When the heat insulating material is not used, the anchor body of the present invention can be diverted while being attached to the mold.
[0032]
Claim 2 of the present application 6 According to the present invention, in the spacer according to any one of claims 12 to 18, the board anchor is claimed in claim 2. 5 A hollow slab spacer characterized by being an anchor for board. Even when the heat insulating material is used, the board anchor can be used as the spacer for the hollow slab by joining the spacer main body as in the case where the heat insulating material is not used.
[0033]
Claim 2 of the present application 7 According to the present invention, there is provided a board anchor for use in a board in which a formwork (51) and a heat insulating material (52) provided thereon are combined, and a substrate (130) having a circular through hole (131) penetrating front and back. An anchor body (120) having a hanging portion (122) having a retaining portion (124) that bulges outward from the periphery of the through hole on the back surface of the back surface, and an upper shaft (132) are formed in the through hole ( 131) and the lower shaft (133) are formed to have a smaller diameter, and the boundary between the upper shaft (132) and the lower shaft (133) is near the boundary between the formwork (51) and the heat insulating material (52). A shaft body (121) having a non-circular lower head (134) at the lower end that can be inserted into the through hole (131) and the hanging part (122) and cannot be pulled out by rotating by a predetermined angle. The anchor body (120) is When inserted into the holes formed in (51, 52), the anchor body (120) is fixed to the board by holding the board (51, 52) between the back surface of the substrate (130) and the retaining portion (124). When the shaft body (121) is inserted into the anchor body (120) and rotated by a predetermined angle, the lower head (134) engages with the lower end of the drooping portion (122) and cannot be pulled out. The board anchor. If comprised in this way, since a clearance gap will not arise between an anchor main body and a shaft body in the part of a heat insulating material, heat insulation performance will not fall.
[0034]
Claim 2 of the present application 8 The invention of claim 2 7 In the board anchor, a breakage part (125) formed weakly is provided in the vicinity of the boundary between the mold (51) and the heat insulating material (52) of the hanging part (122), and the upper shaft (132) It is the board anchor characterized by providing the rupture part (138) formed weakly directly under the. When configured in this manner, by breaking at the fracture portion, the anchor body and the shaft body remain in the heat insulating material portion, and the mold frame portion can be removed. Therefore, the mold frame can be removed, and the heat insulation performance is also reduced. Can be prevented.
[0035]
Claims of the present application 29 The invention of claim 2 8 In this board anchor, a stopper (137) protrudes from the outer periphery of the lower shaft (133), and a stopper receiving portion (126) corresponding to the stopper (126) protrudes from the inner surface of the hanging portion (122). 121) is rotated by a predetermined angle, the stopper (137) abuts against the stopper receiving portion (126) to stop the rotation, and when the lower head (134) is rotated with a strong force at the time of mold form disassembly, the stopper Since (137) is in contact with the stopper receiving portion (126), the lower portion (123) of the hanging portion (122) rotates together with the lower shaft (133), and the breaking portion (138) breaks to lower the lower shaft (133). 133), and the broken portion (125) is broken so that the lower portion (123) of the hanging portion (122) can be removed. With this configuration, if only the lower head portion of the shaft body is rotated, the stopper is in contact with the stopper receiving portion, so that the lower portion of the drooping portion rotates together with the lower shaft, and the fracture portion is broken and the lower portion is broken. The lower part of the shaft and the hanging part can be removed, and the formwork can be removed.
[0036]
DETAILED DESCRIPTION OF THE INVENTION
Example 1:
1 to 4 relate to a board anchor according to an embodiment of the present invention and a hollow slab binding tool 1 using the same, and FIG. 1 is an explanatory view showing a part of the hollow slab binding tool 1 cut away. Is a perspective view of the anchor main body 2, FIG. 3 is an explanatory view for inserting the anchor main body 2 into the mold 51, and FIG.
[0037]
The board anchor and the hollow slab binding tool 1 of this embodiment are composed of an anchor body 2 and a shaft body 3. The anchor body 2 is made of plastic and includes a substrate 4 having a non-circular through hole 5 penetrating the front and back, and two hanging parts 6 that are suspended from the periphery of the through hole 5 on the back surface of the substrate 4. Is formed with a retaining portion 7 that bulges outward. The substrate 4 has a disk shape and has a non-circular through hole 5 in the center. The shape of the through hole may be a non-circular shape, but it is preferable that the through hole has a tie shape with two opposite ends cut into a bow shape. A raised portion 10 and a stopper 9 are formed on the outer periphery of the upper surface of the substrate 4. The drooping portion 6 has a shape in which the central portion of the cylinder is vertically cut out, and its length is slightly longer than the thickness of the board (form 51) to be attached. By adopting such a shape, the drooping portion 6 is easily deformed when the drooping portion 6 is inserted into the hole of the board (form 51) in combination with the notch 8 on the back surface of the substrate 4. Easy insertion. The shape of the hanging portion may be a cylindrical shape or a shape in which a longitudinal groove is provided in the cylinder. The outer peripheral surface of the drooping portion 6 is a rough surface that increases friction. As shown in FIG. 3, a board (form 51) is provided with a hole substantially the same as the outer diameter d of the drooping portion 6, and when the drooping portion 6 is inserted into the hole from above, a gap at the lower end of the facing drooping portion 6 is provided. Is closed and the outer diameter of the retaining portion 7 at the lower end becomes substantially equal to the hole diameter of the board. In this way, the protruding amount of the retaining portion 7 at the lower end of the drooping portion 6 can be maximized, and the anchor pullout strength is maximized. When the retaining portion 7 passes the board (form 51), the hanging portion 6 is elastically restored and spreads, and the anchor body is attached to the board by sandwiching the board (form 51) between the back surface of the substrate 4 and the retaining portion 7. Fixed.
[0038]
The shaft body 3 is made of plastic, has a cylindrical shape, has a non-circular lower head portion 11 at the lower end, and has a disc portion 13 formed in the middle of the joining means 12 bent in a bowl shape at the upper end. . Two stoppers 14 are provided on the upper surface of the disc portion 13 so as to protrude outward 180 ° and project outward. The lower head 11 may be a non-circular shape, but is preferably the same shape as the through hole 5 described above. Immediately below the disc portion 13 is a broken portion 16 which is formed weakly by providing a circumferential groove. A hexagonal turning means 15 is provided on the lower surface of the lower head 11.
[0039]
The binding tool 1 for hollow slabs is used as shown in FIG. A circular hole is made in the mold 51 (plywood 12 mm thick), and the anchor body 2 is inserted into the hole from above the mold and fixed. Next, the shaft body 3 is inserted into the through hole 5 of the anchor main body 2 until the disc portion 13 contacts the upper surface of the substrate 4 with the orientation of the lower head portion 11 and the through hole 5 aligned. At this time, the disc part 13 enters the inside of the upright part 10. Next, when the shaft body 3 is rotated by 90 °, the stopper 14 comes into contact with the stopper receiving portion 9 to stop the rotation, and the lower head portion 11 engages with the lower end of the hanging portion 6 and cannot be pulled out. Since the outer diameter of the shaft portion of the shaft body 3 is substantially equal to the interval between the drooping portions 6, the interval between the drooping portions 6 is reliably restored to a predetermined interval by inserting the shaft body 3 into the anchor body 2. The anchor body 2 is prevented from being pulled out of the board (form 51). Then, the hook-like floating prevention means 12 is hooked on the lower distribution reinforcing bar 54. In this way, the lower muscles (the lower strength muscles 54 and the lower main muscles 53) are prevented from being lifted. Therefore, if the voids are connected directly or indirectly to the lower muscles, the voids are prevented from being lifted by buoyancy. it can. The levitation preventing means may be connected to the upper muscle to prevent the upper levitation, or may be directly connected to the void or connected to the void accessory (such as the penetrating muscle 141). When the concrete 51 is placed and the mold 51 is removed after curing, when the rotating means 15 is rotated from the lower side of the mold 51 with a spanner or the like, the fracture portion 16 is cut and the lower portion of the shaft body 3 falls off. If it does so, the formwork 51 with the spacer main body 2 attached can be removed from a concrete slab. The mold 51 with the spacer body 2 attached thereto can be used as it is as a slab mold on the next floor.
[0040]
Example 2:
FIGS. 5 to 11 relate to the board anchor of the embodiment of the present invention and the hollow slab spacer 21 using the same. FIG. 5 is an explanatory view showing a part of the hollow slab spacer 21 cut away. FIG. 7 is a perspective view of the shaft body 23, FIG. 8 is an explanatory side view of the upper muscle holding member 38, FIG. 9 is a perspective view of the lower muscle holding member 37, and FIGS. It is a perspective view of the state which joined the lower muscle holding member 37 and.
[0041]
The board anchor of this embodiment includes an anchor body 22 and a shaft body 23. The anchor body 22 is made of plastic, and includes a substrate 24 having a non-circular through hole 25 penetrating the front and back, and two hanging portions 26 that are suspended from the periphery of the through hole 25 on the back surface of the substrate 24. A retaining portion 27 that bulges outward is formed at the lower end of the. The substrate 24 has a disk shape and has a non-circular through hole 25 in the center. The shape of the through hole may be non-circular, but is preferably a Tyco shape. Positioning protrusions 47 and 48 that engage with the positioning pieces 46 of the spacer body 32 are formed on the outer periphery of the upper surface of the substrate 24. The positioning piece 46 enters and engages between the positioning protrusions 47 and 48 and is positioned. The positioning protrusion 47 is tapered so that the positioning piece 46 can easily enter. The drooping portion 26 has a shape in which the center portion of the cylinder is cut out vertically, and its length is slightly longer than the thickness of the board (form 51) to be attached. This shape is the same as that of the anchor body 2 described above, and together with the notch 49 on the back surface of the substrate 24, the hanging portion 26 is easily deformed when the hanging portion 26 is inserted into the hole of the board (form 51). Therefore, the insertion can be facilitated, and the pull-out strength can be maximized by making the retaining portion 27 widest. The shape of the hanging portion may be a cylindrical shape or a shape in which a longitudinal groove is provided in the cylinder. The board (form 51) is provided with a circular hole having a diameter substantially the same as the outer diameter of the hanging part 26. When the hanging part 26 is inserted into the hole from above, the retaining part 27 passes through the board (form 51). The hanging portion is elastically restored and spreads, and the anchor body is fixed to the board by sandwiching the board (form frame 51) between the back surface of the substrate 24 and the retaining portion 27.
[0042]
The shaft body 23 is made of plastic, has a cylindrical shape, has a non-circular lower head portion 28 at the lower end, and has a non-circular upper head which is the joining means 29 at the upper end. The shape of the lower head 28 and the upper head may be non-circular, but it is preferable that the lower head 28 and the upper head have a shape similar to the through hole 25 described above. Moreover, it is preferable that the lower head 28 and the upper head have the same direction (long sides are in the same direction). A stopper piece 58 is formed slightly below the upper head. The shape of the stopper piece 58 is also a Tyco shape, and the direction thereof is preferably perpendicular to the lower head 28 and the upper head. Immediately below the stopper piece 58 is a fractured portion 30 which is formed weak by providing a circumferential groove. A hexagonal turning means 50 is provided on the lower surface of the lower head 28.
[0043]
The shaft body 23 is inserted into the through hole 25 and the hanging part 26 of the anchor main body 22 fixed to the board (form 51) from above. When the lower head portion 28 passes through the through hole 25 and the hanging portion 26 and rotates by a predetermined angle (90 ° in this case), the outer end of the lower head portion 28 enters below the hanging portion 26 and the shaft body 23 is pulled out. It becomes impossible. Since the outer diameter of the shaft portion of the shaft body 23 is substantially equal to the interval between the drooping portions 26, the interval between the drooping portions 26 is reliably restored to a predetermined interval by inserting the shaft body 23 into the anchor body 22. The anchor body 22 is prevented from being pulled out of the board (form 51). Since the anchor main body 22 and the shaft body 23 can be inserted and fixed from one side (upper side) of the board (form 51), the attaching operation is very easy.
[0044]
The spacer main body 32 includes a lower bar holding member 37, an upper bar holding member 38, and a single column member 39. The lower bar holding member 37 is made of plastic, and the lower bar holding parts 33 are formed to project outward at three places. The lower main muscle 53 is supported on the lower muscle holding portion 33, and the lower distribution muscle 54 that is orthogonal to the lower main muscle 53 is supported thereon. A metal nut 42 is inserted and attached from the outside to a nut mounting portion 40 formed in the lower bar holding member 37 and opening in the side surface of the lower bar holding member 37. A support member 39 is screwed onto the metal nut 42. In addition, a non-circular insertion port 44 and a rotary space 45 on its heel (upper side) are provided as a joint portion 36 on the lower surface of the lower-strand holding member 37. The shape of the insertion port 44 is a Tyco shape corresponding to the upper head (joining means 29) of the shaft body 23. The rotary space 45 has a cylindrical shape whose upper head can rotate inside. By inserting the upper head of the shaft body 23 into the rotation space 45 from the insertion port 44 and rotating it by a predetermined angle (90 ° in this case), the upper head cannot be pulled out. Further, when the rotation is performed by a predetermined angle, the stopper piece 58 of the shaft body 23 comes into contact with the stopper protrusion 59 and cannot be rotated any more.
[0045]
The upper bar holding member 38 is made of plastic, and the upper bar holding part 34 is formed so as to project outward at two places on the opposite side of 180 °. An upper distributing muscle 56 is supported on the upper muscle holding portion 34, and an upper main muscle 55 that is orthogonal to the upper distributing muscle 56 is supported thereon. Above the upper bar holding part 34, a bar-shaped anti-floating means 35 having an E-shaped cross section is provided in a direction perpendicular to the upper bar holding part 34. When a lifting force acts on the upper muscles (upper main muscle 55, upper distribution muscle 56), the anti-lifting means 35 comes into contact with the upper main muscle 55, and the upper muscle is prevented from rising. Further, a metal nut 43 is inserted and attached from a side surface to a nut mounting portion 41 formed in the upper bar holding member 38 and opening in the side surface of the upper bar holding member 38. A support member 39 is screwed onto the metal nut 43.
[0046]
The strut member 39 is a bolt having male threads at both ends, and the lower bar holding member 37 is attached by screwing the male screw at the lower end to the metal nut 42, and the upper bar holding member by screwing the male screw at the upper end to the metal nut 43. 38 is attached.
[0047]
Next, an example of a preferable assembly order of the hollow slab spacer 21 will be described. Metal nuts 42 and 43 are screwed to both ends of the column member 39 in advance. Next, the lower end metal nut 42 is inserted into the nut mounting portion 40 of the lower bar holding member 37 from the side surface to attach the lower bar holding member 37, and the upper end metal nut 43 is connected to the nut mounting portion 41 of the upper bar holding member 38 on the side surface. To insert the upper muscle holding member 38, and the assembly of the spacer body 32 is completed. Further, the shaft body 23 is inserted into the lower surface of the lower muscle holding portion 37 and rotated by a predetermined angle. The anchor body 22 is attached by being inserted into the hole of the mold 51. Finally, the shaft body attached to the spacer main body 32 is inserted into the anchor main body 22 attached to the mold and rotated by a predetermined angle to fix the spacer main body to the mold.
[0048]
When placing concrete on a slab formwork and disassembling the formwork after curing, the turning means 50 is turned from the lower side of the formwork with a tool such as a spanner. Then, the shaft body 23 is broken at the broken portion 30, and the lower portion can be removed from the broken portion 30 of the shaft body 23, so that the mold 51 can be removed. Since the anchor body 22 remains attached to the formwork, it can be used as a slab formwork for the next floor as it is.
[0049]
Example 3:
FIGS. 12 to 18 relate to a board anchor according to an embodiment of the present invention and a hollow slab spacer 60 using the board anchor, FIG. 12 is an explanatory view showing a part of the hollow slab spacer 60 cut out, and FIG. FIG. 14 is a bottom view of the shaft body 62, FIG. 15 is an explanatory view showing the front and side of the lower muscle holding member 75, and FIG. 16 is an illustration of the lower muscle holding member 75. 17 is a plan view, FIG. 17 is an explanatory view showing the front and side surfaces of the upper muscle holding member 76, and FIG. 18 is a bottom view of the upper muscle holding member 76.
[0050]
The board anchor of this embodiment includes an anchor body 61 and a shaft body 62. The anchor main body 61 is made of plastic, and includes a disc-shaped substrate 64 having a circular through-hole 63a penetrating the front and back at the center, and a cylindrical hanging portion 63 that is suspended from the periphery of the through-hole 63a on the back surface of the substrate 64. Become. The lower end of the hanging part 63 is a retaining part 65 that bulges outward. The inner wall of the hanging part 63 has a small inner diameter at the upper part and a larger inner diameter at the lower part, and the boundary is a step part 66. The height position of the step portion 66 is within the height range where the retaining portion 65 is formed. Two vertical grooves 69 are formed in the hanging portion 63 so as to be easily deformed. In addition, a tapered guide portion 86 opened upward corresponding to the retaining spring portion 68 of the shaft body 62 is formed on the inner wall upper portion of the hanging portion 63. When the anchor main body 61 is inserted into a hole formed in the board (form 51), the hanging part 63 enters the hole while reducing its diameter by elasticity, and when the retaining part 65 penetrates the hole, the hanging part is shaped by elasticity. The anchor body 61 is fixed to the board (form 51) by holding the board between the back surface of the substrate 64 and the retaining portion 65. Further, four screws 84 are screwed into the board (form 51) and firmly fixed, but this screw is not essential.
[0051]
The shaft body 62 has an outer diameter of the shaft portion substantially equal to the inner diameter of the anchor main body 61, and has a male screw as a joining means 67 in the upper portion and an arrow-shaped retaining spring portion 68 in the lower portion. The arrow-shaped portion of the retaining spring portion 68 is elastically deformed inward. A hexagonal turning means 85 is formed under the arrow-shaped portion. When the shaft body 62 is inserted into the anchor body 61 from above, the arrow-shaped retaining spring portion 68 enters the anchor body while being deformed, and when the retaining spring portion 68 passes through the step portion 66, it returns to its original shape due to elasticity. Therefore, the shaft body 62 is not pulled out from the anchor body 61. By inserting the shaft body 62 into the anchor main body 61, the drooping portion 63 is surely restored to its original diameter, and the anchor main body 61 is prevented from being pulled out of the board (form 51). Since the anchor main body 61 and the shaft body 62 can be inserted and fixed from one side (upper side) of the board (form 51), attachment work is very easy.
[0052]
The spacer main body 70 includes a lower-strand holding member 75, an upper-stretch holding member 76, and a single support member 77. The lower bar holding member 75 is made of plastic, and lower bar holding parts 71 are formed to protrude outward at two places. A lower main muscle 53 is supported on the lower muscle holding portion 71, and a lower distribution muscle 54 that is orthogonal to the lower main muscle 53 is supported thereon. A metal nut 80 to be screwed with the support member 77 is inserted and attached from a side surface to a nut mounting portion 78 formed in the lower bar holding member 75 and opened to the side surface of the lower bar holding member 75. A support member 77 is screwed to the metal nut 80. Below that, a metal nut 83 for joining to the shaft body 62 is attached to the attachment portion 82 similar to the attachment portion 78, and the female screw of the metal nut 83 serves as the joint portion 74. It is screwed with a male screw at the upper end which is means 67.
[0053]
The upper bar holding member 76 is made of plastic, and the upper bar holding part 72 is formed to protrude outwardly at two places on the opposite side of 180 °. An upper distribution muscle 56 is supported on the upper muscle holding portion 72, and an upper main muscle 55 orthogonal to the upper distribution muscle 56 is supported thereon. Above the upper bar holding part 72, a rod-shaped floating prevention means 73 having an E-shaped cross section is provided in a direction perpendicular to the upper bar holding part 72. When a lifting force acts on the upper muscles (upper main muscle 55, upper distribution muscle 56), the levitating prevention means 73 comes into contact with the upper main muscle 55, and the upper muscle is prevented from rising. Further, a metal nut 81 is inserted and attached from a side surface to a nut mounting portion 79 formed in the upper bar holding member 76 and opening to the side surface thereof. A support member 77 is screwed to the metal nut 81.
[0054]
The strut member 77 is a bolt having male threads at both ends, and the lower bar holding member 75 is attached by screwing the male screw at the lower end to the metal nut 80, and the upper bar holding member by screwing the male screw at the upper end to the metal nut 81. 76 is attached.
[0055]
Next, an example of a preferable assembly order of the hollow slab spacer 60 will be described. Metal nuts 80 and 83 are mounted on the lower bar holding member 75, and metal nuts 81 are mounted on the upper bar holding member 76 in advance. The metal nuts 80 and 81 are screwed to both ends of the support member 77 to attach the lower muscle holding member 75 and the upper muscle holding member 76, and the spacer body 70 is assembled. A shaft body 62 is screwed onto the metal nut 83, and the shaft body 62 is attached to the lower surface of the lower bar holding member. The anchor body 61 is attached by being inserted into the hole of the mold 51. Finally, the shaft body 62 attached to the lower surface of the spacer body 70 is inserted into the anchor body 61 attached to the mold 51 to fix the spacer body 70 to the mold 51. At this time, since the arrow-shaped retaining spring portion 68 of the shaft body 62 enters the hanging portion 63 along the guide portion 86 formed on the inner wall upper portion of the hanging portion 63, it can be easily inserted, and The retaining spring portion 68 can be directed in a predetermined direction.
[0056]
When concrete is placed on the slab formwork and the formwork after being disassembled is disassembled, the turning means 85 is turned with a tool such as a spanner from the lower side of the formwork, and the shaft body 62 is removed. 51 can be removed. Since the anchor main body 61 remains attached to the formwork 51, it can be used as a slab formwork for the next floor as it is. The joint part 74 (in this case, the female screw of the metal nut 83) of the lower-strand holding member can be used as a ceiling insert (an insert for suspending a ceiling, a duct, a lighting fixture, or the like).
[0057]
Example 4:
19 to 22 relate to the board anchor of the embodiment and the hollow slab spacer 150 using the board anchor, FIG. 19 is an explanatory view of the main part shown by cutting out a part of the hollow slab spacer 150, and FIG. FIG. 21 is an explanatory diagram showing two side surfaces and a bottom surface of the shaft body 160, and FIG. 22 is a plan view, partially cut side surfaces and a bottom surface of the lower muscle holding member 170. It is explanatory drawing.
[0058]
The board anchor of this embodiment includes an anchor body 151 and a shaft body 160. The anchor main body 151 is made of plastic and includes a substrate 152 having a hexagonal planar shape and two hanging portions 154 that are suspended from the lower surface thereof. The substrate 152 has a through hole 153 penetrating the front and back. The planar shape of the through-hole 153 is a Tyco shape in which two opposite ends of a circle are cut out into an arcuate shape. The drooping portion 154 is droopingly formed from the arcuate portion, and the cross-sectional shape is also arcuate, but a retaining portion 155 that bulges outward is formed at the lower end. A cutout 156 is formed on the upper surface of the substrate 152 so as to be easily bent and deformed when inserted into a hole in the board. The retaining spring portion of the shaft body 161 can be easily pushed into the linear shape of the through hole 153. As described above, a tapered portion 158 is formed, and an upright portion 157 is provided at the outer edge portion. When the anchor main body 151 is inserted into a hole formed in the board (form 51), the substrate 152 is elastically deformed so as to be bent at the notch 156, and the opposing hanging part 154 is elastically deformed so that the lower ends approach each other. When the retaining portion 155 penetrates the hole, the substrate and the drooping portion are restored to their original shape due to elasticity, and the anchor body 151 is sandwiched between the back surface of the substrate 152 and the retaining portion 155 so that the anchor body 151 51).
[0059]
The shaft 160 is made of plastic and has a cylindrical shape. A joining means 162 (thread) is formed at the upper part, a retaining spring part 161 having a flat shape is formed at the lower part, and a hexagonal rotating part 161 is formed at the lower end. A moving means 165 is formed. The retaining spring part 161 has a shape and size that can finally pass through the through hole 153 of the anchor main body in a contracted state, and when it protrudes below the hanging part, it opens due to a resilient force and cannot pass through the through hole 153. The shaft body is prevented from being pulled out by engaging with the lower part of the hanging part. By making the retaining spring portion into such a shape, the area hooked on the hanging portion of the retaining spring portion and the pull-out resistance of the shaft body are maximized. The protrusion 163 formed at the upper end of the retaining spring portion 161 is for expanding the drooping portion 154 outward by the elastic return force of the retaining spring portion 161, as shown in FIG. The portion 155 is securely hooked on the back side of the board (form 51) and prevents the anchor body from being pulled out. In addition, two marks 164 (longitudinal grooves) are provided at two positions 180 degrees opposite to the lower part of the joining means 162 (threads) of the shaft body 160.
[0060]
The spacer main body in the present embodiment is composed of a lower muscle holding member 170, a support member 167, and an upper muscle holding member (not shown). As the upper muscle holding member, any member can be used in addition to the same member as in the third embodiment.
[0061]
The lower bar holding member 170 is made of plastic, and a hexagonal bottom plate part 174 is formed at the lower end of the cylindrical cylindrical main body 171. From the outer periphery, the lower bar holding part 175 has four cross-shaped outwards. An overhang is formed. A lower main muscle 53 is supported on the lower muscle holding portion 175, and a lower distribution muscle 54 that is orthogonal thereto is supported thereon. A hexagonal column-shaped hollow nut storage portion 172 is formed inside the cylindrical main body, and a bolt hole 173 passes through the bottom portion. A nut 166 (high nut) is stored in the storage portion 172. The support member 167 is screwed from above the nut 166, and the shaft body 160 is screwed from below. Therefore, the nut 166 is a joint for joining the shaft bodies. Moreover, since the upper part of the nut 166 protrudes above the lower bar holding member (170) and restricts the movement of the lower bar (53), the lower bar is positioned when the lower bar is arranged, and the bar arrangement work is easy. It becomes. On the lower surface, eight mark projections 177 are provided around the bolt holes 173 at a pitch of 45 degrees. In addition, a slit 176 is formed in the lower portion of the lower muscle holding portion 175 so that the lower muscle can be bound to the lower muscle holding portion with a binding wire 178 as shown in FIG. In order to bind the lower muscles, not only such slits but also holes and protrusions may be provided.
[0062]
A nut 166 is attached in advance to the lower muscle holding member 170, and the shaft body 160 is screwed to the nut 166 from below. At this time, by aligning the mark 164 and the mark protrusion 177, the lower muscle holding member and the shaft body are aligned. Thereafter, the shaft 160 is inserted and attached to the anchor main body 151 attached to the lower frame holding member 51. At this time, the retaining spring portion 161 of the shaft body 160 has the same shape as the through hole 153 of the anchor main body 151, and the size is such that the spring can be finally retracted, so the position (angle) of the shaft body and the anchor main body is adjusted. Made automatically. Further, since the hexagonal bottom plate portion 174 of the lower muscle holding member 170 is fitted to the inner periphery of the upright portion 157 of the base plate 152 of the anchor main body 151, when the angle is adjusted by rotating the lower muscle holding member 170, the anchor The main body 151 also rotates together, and the positional (angle) relationship between the shaft body and the anchor main body does not change, so the pull-out strength of the shaft body does not decrease. In order to rotate both the lower muscle holding member and the anchor main body, various configurations such as an uneven fitting of the contact surface can be used in addition to such a configuration.
[0063]
After the lower bar holding member 170 is attached to the mold in this manner, lower bar barbing, void installation, support / upper bar holding member / lifting prevention means mounting, and upper bar barbing are performed. After dismantling the formwork, the anchor main body 151 can be diverted as a formwork on another floor while being attached to the formwork, and the nut 166 can be used as a ceiling insert, as in the third embodiment.
[0064]
Example 5:
FIG. 23 to FIG. 27 relate to a board anchor 90 according to an embodiment of the present invention and a hollow slab spacer using the same. FIG. 23 is a partial explanatory view of the hollow slab spacer shown in FIG. FIG. 25 is a side view of the anchor main body 91, FIG. 26 is a cross-sectional view taken along the line AA in FIG. 25, and FIG. 27 is a bottom view of the packing material 94.
[0065]
The board anchor 90 of this embodiment includes an anchor body 91 and a packing material 94. The anchor main body 91 is made of plastic, has a substantially cylindrical shape, and has a bolt hole 92 penetrating in the vertical direction. Inside, a metal nut 100 is incorporated by insert molding, whereby the bolt hole 92 has a thread. A crescent-shaped fitting groove 93 into which the board (form 51) is fitted and a recess 98 into which the protrusion 97 of the packing member 94 engages are formed on the side surface. The packing material 94 is preferably formed of an elastic body such as rubber or soft plastic, has a crescent shape, is inserted between the board (form 51) and the anchor main body 91, and closes the gap so that it does not easily come off. Protrusions 95, 96, and 97 are provided on the surface. A groove 99 is provided on the bottom surface so that it can be easily fitted.
[0066]
When attaching the board anchor 90 to the board (form 51), first, the anchor body 91 is inserted into the circular hole 57 formed in the board (form 51), and then moved in the horizontal (horizontal) direction to fit. The board around the circular hole 57 is fitted into the groove 93 to hold the anchor main body 91 on the board. Furthermore, fixing with screws 107 is sufficient, but screwing is not essential. When the anchor main body 91 is moved in the lateral direction, a crescent-shaped gap is generated in a part of the circular hole 57, and the packing material 94 is inserted into the gap to close it. The board anchor 90 is fixed to the mold by filling the packing material.
[0067]
The spacer main body 101 in FIG. 23 includes a lower muscle holding member 102 having a lower muscle holding portion 103, an upper muscle holding member (not shown) having an upper muscle holding portion and an upper muscle lifting prevention means, a lower muscle holding member, And a support member 104 for connecting the upper muscle holding member. The same thing as the above-mentioned example can be used for an upper line maintenance member, for example. The lower bar holding member 102 is made of plastic, and as shown in FIG. 29, the lower bar holding part 103 is formed at one place and the leg parts 108 are extended outward. A high nut 105 is incorporated therein by insert molding, whereby the lower bar holding member 102 has a bolt hole penetrating in the vertical direction and having a thread inside.
[0068]
The strut member 104 is a bolt having male screws at both ends, and the lower thread holding member 102 is attached by screwing the male screw at the lower end into the high nut 105. At the root of the male screw at the lower end, a fracture portion 106 is formed which is weakened by forming a groove on the outer periphery. The lower end of the bolt protrudes from the bottom surface of the lower bar holding member 102. The protruding portion is screwed into the metal nut 100 of the board anchor 90 attached to the mold, and is fixed to the mold 51 as shown in FIG. At this time, it is desirable that the position of the breaking portion 106 is inside the lower bar holding member 102 (inside the bolt hole).
[0069]
Reference example :
As shown in FIG. Reference example Is different from Example 5 in board anchors. Further, the structure is the same as that of the fifth embodiment except that the break portion 106 ′ of the column member 104 ′ is provided in the middle of the lower end male screw. The board anchor 110 is made of plastic, has a cylindrical shape, is provided with a substrate 111 at the top, and a retaining portion 112 that protrudes from the outer periphery of the lower end. The inside is a bolt hole penetrating vertically and having a thread. The board anchor 110 is fixed to the mold by being pushed into the hole formed in the mold 51 from above. The board anchor may be anything as long as it has bolt holes and can be fixed to the mold. The lower end of the column member 104 ′ protrudes from the bottom surface of the lower muscle holding member 102. The protruding portion is screwed into the bolt hole of the board anchor 110 attached to the mold, and is fixed to the mold 51 as shown in FIG. At this time, it is desirable that the position of the fractured portion 106 ′ is inside the lower bar holding member 102 (inside the bolt hole).
[0070]
Example 5 And reference examples In No Then, when placing concrete on the slab formwork and disassembling the post-cured formwork, rotate the projecting part at the lower end of the column members 104, 104 ′ with an appropriate tool from the lower side of the formwork. The rupture portions 106 and 106 ′ are ruptured, and a portion below the rupture portions 106 and 106 ′ can be extracted, and the mold 51 can be removed. Since the board anchors 90 and 110 remain attached to the mold 51, they can be used as slab molds for the next floor as they are. The board anchors 90, 110 and the bolt holes of the high nut 105 can be used as ceiling inserts (inserts for hanging ceilings, ducts, lighting fixtures, etc.).
[0071]
Example 6 :
FIG. 30 shows a hollow slab spacer 21 ′ used when the heat insulating material 52 is driven into the lower surface of the slab (the heat insulating material 52 is provided on the mold 51). The board anchor in this case is an embodiment used for a composite board of formwork and heat insulating material. 6 The board anchor is composed of an anchor body 22 'and a shaft body 23'. The spacer body 32 is the same as that in the second embodiment. This board anchor is slightly different from the board anchor of the second embodiment. That is, the anchor body 22 'and the shaft body 23' are formed longer by the thickness of the heat insulating material 52, the fracture portion 30 is provided in the shaft body 23 ', and the hanging portion 6' of the anchor body 22 'is also provided. The fracture | rupture part 31 which is weak by the groove | channel provided in the outer peripheral surface is provided. The positions of the fracture portions 30 and 31 are preferably near the boundary between the mold 51 and the heat insulating material 52. Other configurations of the anchor main body 22 ′ and the shaft body 23 ′ are the same as those in the second embodiment. When disassembling the mold, the rotating means 50 is rotated with a tool such as a spanner from the lower side of the mold. As a result, the shaft body 23 ′ is broken at the breaking portion 30, the portion below the anchor body 22 ′ is also rotated, and the drooping portion 6 ′ is broken at the breaking portion 31, and the breaking portion 30 of the shaft body 23 ′ and the anchor body 22 ′ is broken. , 31 can be removed, and the mold 51 can be removed. When the mold 51 is removed, the heat insulating material 52 remains in a state of being driven into the lower surface of the slab. In this case, since the drooping portion is droopingly formed from the periphery of the non-circular through hole of the substrate, a gap is generated between the shaft portion of the shaft body 23 ′ and the drooping portion 6 ′. A slight space will exist, and the heat insulation performance of the slab will be slightly reduced.
[0072]
Example 7 :
31 to 33 are examples. 7 FIG. 31 is an explanatory view showing a part of the board anchor in a cutout, FIG. 32 is an explanatory view of the anchor main body 120, and FIG. 33 is an explanatory view of the shaft body 121.
[0073]
The board anchor of this embodiment is also used when the heat insulating material 52 is driven into the slab (the heat insulating material 52 is provided on the mold 51). The anchor main body 120 includes a substrate 130 and a hanging portion 122. The circular substrate 131 has a circular through-hole 131 penetrating the front and back, and a cylindrical hanging portion 122 is suspended from the periphery thereof. A retaining portion 124 that bulges outward is formed at the lower end of the drooping portion 122. The drooping portion 122 has a thin cylindrical shape at the upper portion, and the lower portion 123 is broken into two by a notch portion 128 that is a hollowed out cylinder at the center, and the gap d is smaller than the inner diameter of the upper portion. A stopper receiving portion 126 is formed at the lowermost portion of the upper surface of the drooping portion 122. This corresponds to the stopper 137 of the shaft body 121. On the outer peripheral surface of the drooping portion 122, a broken portion 125 that is weakened by a groove and a protrusion 129 that is one mode of a rough surface are formed. A stopper projection 127 is provided on the lower surface of the drooping portion 122.
[0074]
The shaft body 121 has both a cylindrical upper shaft 132 and a lower shaft 133, a joining means 136 is formed at the upper end, a lower head 134 is formed at the lower end, and a rotating means 135 is provided on the lower surface of the lower head 134. ing. The lower head 134 and the joining means 136 are the same as the lower head 28 and the joining means 29 of the second embodiment. The outer diameter of the upper shaft 132 is substantially equal to the inner diameter of the upper portion of the hanging portion 122 of the anchor body, and the outer shape of the lower shaft 133 is substantially equal to the gap d of the lower portion 123 of the hanging portion. At the upper part of the lower shaft 133, two stoppers 137 are formed to protrude 180 ° on the opposite side, and a fragile portion 138 is formed at the boundary with the upper shaft above it.
[0075]
The anchor main body 120 is fixed by being inserted from above into a circular hole formed in the board (the formwork 51 and the heat insulating material 52). The shaft body 121 is attached to, for example, the same spacer main body 32 as that of the second embodiment, and is inserted into the through hole 131 and the hanging portion 122 of the anchor main body 120 and rotated by 90 °. At this time, the stopper 137 comes into contact with the stopper receiving portion 126, and the outer end of the lower head 134 comes into contact with the stopper projection 127 to stop the rotation. Both broken portions 125 and 138 are located near the boundary between the mold 51 and the heat insulating material 52. Since the outer diameter of the upper shaft 132 is substantially equal to the inner diameter of the upper portion of the hanging part 122 of the anchor body, there is almost no gap between them, and no space is generated in the heat insulating material 52 portion, so that the heat insulating performance does not deteriorate.
[0076]
When disassembling the mold, the rotating means 135 is rotated with a tool such as a spanner from the lower side of the mold. Then, since the stopper 137 is in contact with the stopper receiving portion 126 and the outer end of the lower head portion 134 is in contact with the stopper projection 127, the lower portion 123 of the hanging portion 122 rotates together with the lower shaft 133, and breaks. The parts 138 and 125 are broken to remove the lower shaft 133 and the lower part 123 of the hanging part 122 so that the mold 51 can be removed. When the mold 51 is removed, the heat insulating material 52 remains in a state of being driven into the lower surface of the slab.
[0077]
【The invention's effect】
The hollow slab spacer of the present invention can be used for reinforcing a hollow slab, for example, as shown in FIGS. A void 140 made of styrene foam is disposed in a square mass formed by the upper straight lines 55 and 56 and the lower straight lines 53 and 54 that are orthogonal to each other. As shown in FIG. 36, the void 140 has a jade shape, and a plurality of voids 140 are connected and integrated by penetrating bars 141. The penetrating muscle 141 is bound and fixed to the lower side of the upper force distribution muscle 56, and the void 140 is supported. When concrete is placed on the slab formwork, the void 140 is remarkably light compared to the concrete, so a large buoyancy is generated. The Since the slab spacer is fixed to the formwork by the board anchor of the present invention, the entire upper and lower bar arrangements do not float.
[0078]
In the present invention, since the board anchor can be firmly attached to a board such as a mold only by work from one side of the board (upper side of the formwork), the attachment work is very simple. By providing the lifting prevention means at the upper part of the shaft body, a binding tool for a hollow slab is obtained. Also, when used as a hollow slab binding tool or a hollow slab spacer, when disassembling the slab formwork, it is possible to easily disassemble the formwork by simply removing one member by screwing the shaft or the like. .
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory view showing a part of a hollow slab binding tool 1 according to an embodiment in a cutaway manner.
FIG. 2 is a perspective view of the anchor body 2. FIG.
FIG. 3 is an explanatory diagram for inserting the anchor body 2 into the mold 52;
FIG. 4 is a perspective view of a shaft body 3;
FIG. 5 is an explanatory view showing a part of a hollow slab spacer 21 with a part cut away.
6 is a perspective view of the anchor main body 22. FIG.
7 is a perspective view of a shaft body 23. FIG.
FIG. 8 is an explanatory side view of an upper muscle holding member 38;
9 is a perspective view of the lower muscle holding member 37. FIG.
FIG. 10 is a perspective view of a state in which the anchor main body 22 and the lower muscle holding member 37 are joined.
FIG. 11 is a perspective view of a state in which the anchor main body 22 and the lower muscle holding member 37 are joined.
FIG. 12 is an explanatory view showing a part of a hollow slab spacer 60 with a part cut away.
13 is an explanatory view showing a plane, a side surface, and a bottom surface of the anchor main body 61. FIG.
14 is a bottom view of the shaft body 62. FIG.
FIG. 15 is an explanatory view showing the front and side of a lower muscle holding member 75;
16 is a plan view of the lower muscle holding member 75. FIG.
FIG. 17 is an explanatory view showing the front and side surfaces of an upper muscle holding member.
18 is a bottom view of the upper muscle holding member 76. FIG.
FIG. 19 is a main part explanatory view showing a part of a hollow slab spacer 150 cut away.
20 is an explanatory view showing a plane, a partially cutaway side surface, and a bottom surface of the anchor main body 151. FIG.
FIG. 21 is an explanatory view showing two side surfaces and a bottom surface of the shaft body 160;
FIG. 22 is an explanatory view showing a flat surface, a partially cutaway side surface, and a bottom surface of the lower muscle holding member 170. FIG.
FIG. 23 is an explanatory view in which a main part of the spacer body 101 and a part of the board anchor 90 are cut away.
FIG. 24 is an explanatory plan view of a state in which the board anchor 90 is attached.
25 is a side view of the anchor main body 91. FIG.
26 is a cross-sectional view taken along line AA in FIG.
27 is a bottom view of the packing material 94. FIG.
FIG. 28 is an explanatory view showing a main part of the spacer main body 101 ′ and a part of the board anchor 110 by cutting away.
FIG. 29 is an explanatory plan view of the lower muscle holding member 102. FIG.
FIG. 30 is an explanatory view showing a part of the hollow slab spacer 21 ′ by cutting away.
FIG. 31 is an explanatory view showing a part of the board anchor in a cutaway manner.
32 is an explanatory diagram of the anchor main body 120. FIG.
33 is an explanatory diagram of a shaft body 121. FIG.
FIG. 34 is an explanatory plan view showing an example of a hollow slab using a slab spacer 21. FIG.
35 is a cross-sectional explanatory diagram of FIG. 34. FIG.
FIG. 36 is an explanatory plan view and side view showing an example of a void 140;
[Explanation of symbols]
1 Tightening tool for hollow slab
2 Anchor body
3 shaft body
4 Substrate
5 Through hole
6 hanging part
7 Stopper
8 notches
9 Stopper receiving part
10 Upright
11 Lower head
12 Means to prevent ascent
13 Disc part
14 Stopper
15 Rotating means
16 Breaking part
21 Spacer for hollow slab
22 Anchor body
23 Shaft
24 Substrate
25 Through hole
26 Suspension
27 Stopper
28 Lower head
29 Joining means
30 Broken part
31 Broken part
32 Spacer body
33 Lower muscle holding part
34 Upper muscle holder
35 Anti-floating means
36 joints
37 Lower muscle holding member
38 Upper muscle holding member
39 Prop member
40 Nut mounting part
41 Nut mounting part
42 Metal nut
43 Metal nut
44 insertion slot
45 revolving space
46 Positioning piece
47 Positioning protrusion
48 Positioning protrusion
49 notches
50 Rotating means
51 formwork
52 Thermal insulation
53 Lower main muscle
54 Lower Strength
55 Superior muscle
56 Top strength muscle
57 Round hole
58 Stopper piece
59 Stopper projection
60 Spacer for hollow slab
61 Anchor body
62 Shaft
63 Suspension
64 substrates
65 Stopper
66 steps
67 Joining means
68 Stopper spring
69 Longitudinal groove
70 Spacer body
71 Lower muscle holding part
72 Upper muscle holder
73 Lifting prevention means
74 joints
75 Lower muscle holding member
76 Upper muscle holding member
77 Prop member
78 Nut mounting part
79 Nut mounting part
80 Metal nut
81 Metal nut
82 Nut mounting part
83 Metal nut
84 screw
85 Rotating means
86 Guide section
90 Anchor for board
91 Anchor body
92 bolt holes
93 Mating groove
94 Packing material
95 protrusion
96 protrusions
97 protrusion
98 recess
99 groove
100 metal nut
101 Spacer body
102 Lower muscle holding member
103 Lower muscle holding part
104 Prop member
105 high nut
106 Breaking part
107 screw
108 legs
110 Anchor for board
111 substrates
112 Stopper
120 Anchor body
121 Shaft
122
123 Bottom of the drooping part
124 retaining part
125 fracture
126 Stopper receiving part
127 Stopper protrusion
128 Notch
129 ridge
130 substrates
131 Through hole
132 Upper shaft
133 Lower shaft
134 Lower head
135 Rotating means
136 Joining means
137 Stopper
138 Broken part
140 void
141 Penetration muscle
150 Hollow Slab Spacer
151 Anchor body
152 substrate
153 Through hole
154 hanging part
155 Stopper
156 notches
157 Upright
158 Tapered part
160 Shaft
161 Stopper spring
162 Joining means
163 Protrusion
164 landmark
165 Rotating means
166 Nut (joint)
167 Prop member
170 Lower muscle holding member
171 Tubular body
172 Nut storage
173 Bolt hole
174 Bottom plate
175 Lower muscle holding part
176 slit
177 Marking protrusion
178 Cable tie

Claims (29)

表裏貫通する非円形貫通孔（５、２５）を有する基板（４、２４）の裏面の貫通孔周囲から、外側に向かって膨出する抜止部（７、２７）を下端に有する垂下部（６、２６）を垂下形成したアンカー本体（２、２２）と、前記貫通孔（５、２５）と垂下部（６、２６）の中に挿通可能で所定角度回転することで引き抜き不能となる非円形の下頭部（１１、２８）を下端に備えた軸体（３、２３）とからなり、前記アンカー本体（２、２２）をボードに形成した穴に挿入すると前記基板（４、２４）の背面と抜止部（７、２７）の間でボードを挟持してアンカー本体（２、２２）がボードに固定され、このアンカー本体（２、２２）に前記軸体（３、２３）を挿入して所定角度回転することで前記下頭部（１１、２８）が前記垂下部（６、２６）の下端に係合して引き抜き不能となることを特徴とするボード用アンカー  A hanging portion (6) having a retaining portion (7, 27) that bulges outward from the periphery of the through hole on the back surface of the substrate (4, 24) having a non-circular through hole (5, 25) penetrating front and back. , 26) is a non-circular shape that can be inserted into the anchor body (2, 22) and the through holes (5, 25) and the hanging portion (6, 26) and rotated by a predetermined angle and cannot be pulled out. Of the base plate (4, 24) when the anchor body (2, 22) is inserted into a hole formed in the board. The anchor body (2, 22) is fixed to the board by holding the board between the back surface and the retaining portion (7, 27), and the shaft body (3, 23) is inserted into the anchor body (2, 22). The lower head (11, 28) is rotated by a predetermined angle to cause the drooping portion (6, 26 Anchor board, wherein the lower end to become impossible pulling engaged with the 請求項１のボード用アンカーにおいて、前記垂下部（６、２６）の外周面が粗面に形成されていることを特徴とするボード用アンカー  2. The board anchor according to claim 1, wherein an outer peripheral surface of the hanging part (6, 26) is formed into a rough surface. 請求項１又は２のボード用アンカーにおいて、前記垂下部（６、２６）が２本対向して形成されており、その対向する垂下部（６、２６）の下端の隙間をなくすように閉じると、下端の抜止部（７、２７）の外径がボードの穴径とほぼ等しくなることを特徴とするボード用アンカー  The board anchor according to claim 1 or 2, wherein the two hanging parts (6, 26) are formed to face each other, and are closed so as to eliminate a gap at the lower end of the facing hanging parts (6, 26). The board anchor characterized in that the outer diameter of the lower end retaining part (7, 27) is substantially equal to the hole diameter of the board 垂下部（６３）と、その上端に形成された基板（６４）とからなり、垂下部（６３）の下端には外側に膨出する抜止部（６５）を形成し、垂下部（６３）の内壁には下部が上部よりも内径が大きくなるような段部（６６）を形成したアンカー本体（６１）と、下部に矢印状の抜止バネ部（６８）を有する軸体（６２）とからなり、前記アンカー本体（６１）をボードに形成した穴に挿入すると前記基板（６４）の背面と抜止部（６５）の間でボードを挟持してアンカー本体（６１）がボードに固定され、このアンカー本体（６１）に前記軸体（６２）を挿入すると、前記抜止バネ部（６８）が前記段部（６６）に係合して引き抜き不能となることを特徴とするボード用アンカー  A hanging part (63) and a substrate (64) formed at the upper end of the hanging part (63) are formed, and at the lower end of the hanging part (63), a retaining part (65) bulging outward is formed, and the hanging part (63) The inner wall comprises an anchor body (61) having a step portion (66) in which the lower portion has a larger inner diameter than the upper portion, and a shaft body (62) having an arrow-shaped retaining spring portion (68) at the lower portion. When the anchor body (61) is inserted into a hole formed in the board, the anchor body (61) is fixed to the board by holding the board between the back surface of the substrate (64) and the retaining portion (65). When the shaft body (62) is inserted into the main body (61), the retaining spring portion (68) engages with the step portion (66) so that it cannot be pulled out. 請求項４のボード用アンカーにおいて、前記垂下部（６３）の内壁上部に、前記抜止バネ部（６８）に対応してテーパ状のガイド部（８６）を形成し、前記アンカー本体（６１）に前記軸体（６２）を挿入するときに、ガイド部（８６）がガイドとなって軸体（６２）が容易に、かつ、所定の向きに挿入されることを特徴とするボード用アンカー  The board anchor according to claim 4, wherein a taper-shaped guide portion (86) corresponding to the retaining spring portion (68) is formed on the inner wall upper portion of the hanging portion (63), and the anchor body (61) When inserting the shaft body (62), the guide portion (86) serves as a guide so that the shaft body (62) can be easily inserted in a predetermined direction. 表裏貫通し円形の対向する２端部を弓形に切り欠いたタイコ形をなす貫通孔（１５３）を有する基板（１５２）の裏面の前記弓形部分から、該弓形の断面形状をなし、外側に向かって膨出する抜止部（１５５）を下端に有する垂下部（１５４）を垂下形成したアンカー本体（１５１）と、下部に矢印状の抜止バネ部（１６１）を有する軸体（１６０）とからなり、前記アンカー本体（１５１）をボードに形成した穴に挿入すると前記基板（１５２）の背面と抜止部（１５５）の間でボードを挟持してアンカー本体（１５１）がボードに固定され、このアンカー本体（１５１）の前記貫通孔（１５３）に前記軸体（１６０）を挿入すると、前記抜止バネ部（１６１）が前記垂下部の下で開いて引き抜き不能となるボード用アンカーであって、前記抜止バネ部（１６１）の平面形状が前記タイコ形をなし、縮めた状態では前記貫通孔（１５３）を通過可能で、解放した状態では前記垂下部に引っ掛かって引き抜き抜き不能となることを特徴とするボード用アンカー  A cross-sectional shape of the arcuate shape is formed from the arcuate portion on the back surface of the substrate (152) having a through-hole (153) having a tie-like shape that penetrates the front and back and has two circular opposite ends cut into an arcuate shape, and faces outward. An anchor body (151) having a hanging part (154) having a hanging part (155) at the lower end and a shaft body (160) having an arrow-shaped retaining spring part (161) at the lower part. When the anchor body (151) is inserted into a hole formed in the board, the anchor body (151) is fixed to the board by holding the board between the back surface of the substrate (152) and the retaining portion (155). When the shaft body (160) is inserted into the through hole (153) of the main body (151), the retaining spring part (161) opens under the hanging part and cannot be pulled out. The planar shape of the retaining spring portion (161) is the above-mentioned Tyco shape, and when it is contracted, it can pass through the through hole (153), and when released, it is caught by the hanging portion and cannot be pulled out. Board anchor 請求項１〜６のいずれかのボード用アンカーにおいて、前記軸体の軸に脆弱に形成された破断部（１６、３０）を設けたことを特徴とするボード用アンカー  The board anchor according to any one of claims 1 to 6, further comprising a breakage portion (16, 30) formed weakly on the shaft of the shaft body. 上下方向に貫通し内周に雌ねじを有するボルト孔（９２）を有し、側面にはボードが嵌合する三日月形状の嵌合溝（９３）を有する概略円筒形状のアンカー本体（９１）と、該アンカー本体（９１）をボードに形成した円形穴（５７）に差し入れた後横方向に移動して前記嵌合溝（９３）に前記円形穴（５７）の周囲の部分のボードを嵌合してアンカー本体（９１）をボードに保持せしめたときに生じる円形穴（５７）との隙間を閉塞する三日月形状のパッキン材（９４）とからなることを特徴とするボード用アンカー  A substantially cylindrical anchor body (91) having a bolt hole (92) penetrating in the vertical direction and having an internal thread on the inner periphery, and having a crescent-shaped fitting groove (93) to which the board is fitted on the side surface; The anchor body (91) is inserted into a circular hole (57) formed in the board and then moved laterally to fit the board around the circular hole (57) into the fitting groove (93). And a crescent-shaped packing material (94) that closes a gap with a circular hole (57) generated when the anchor body (91) is held on the board. 請求項８のボード用アンカーにおいて、前記ボルト孔（９２）が雌ねじを有し、該雌ねじがアンカー本体（９１）に装着された金属ナット（１００）によって形成されていることを特徴とするボード用アンカー  The board anchor according to claim 8, wherein the bolt hole (92) has an internal thread, and the internal thread is formed by a metal nut (100) attached to the anchor body (91). anchor 請求項１〜７のいずれかのボード用アンカーの前記軸体（３）の上部に鉄筋及び／又はボイドの浮き上がりを防止する浮上防止手段（１２）を設けたことを特徴とする中空スラブ用緊結具  Bending for a hollow slab, characterized in that a floating prevention means (12) for preventing the reinforcing bars and / or voids from floating above the shaft (3) of the board anchor according to any one of claims 1 to 7. Ingredients 請求項８又は９のボード用アンカーの前記ボルト孔に、上部に鉄筋及び／又はボイドの浮き上がりを防止する浮上防止手段を有する軸体を螺着したことを特徴とする中空スラブ用緊結具  A hollow slab binding tool, wherein a shaft body having an anti-lifting means for preventing the rebar and / or void from floating up is screwed into the bolt hole of the board anchor according to claim 8 or 9. 上筋及び／又は下筋を所定の高さ位置に保持する鉄筋保持部と、鉄筋及び／又はボイドの浮き上がりを防止する浮上防止手段（３５、７３）を有するスペーサ本体（３２、７０）と、上部に任意の接合手段（２９、６７）を備える前記軸体（２３、６２）を有する請求項１〜７のいずれかのボード用アンカーとからなり、前記スペーサ本体（３２、７０）は前記軸体（２３、６２）の接合手段（２９、６７）と接合可能な接合部（３６、７４）を有することを特徴とする中空スラブ用スペーサ  A spacer main body (32, 70) having a reinforcing bar holding section for holding the upper and / or lower bars at a predetermined height position, and a floating prevention means (35, 73) for preventing the reinforcing bars and / or voids from rising; It consists of the anchor for board in any one of Claims 1-7 which has the said shaft body (23, 62) provided with arbitrary joining means (29, 67) on the upper part, and the said spacer main body (32, 70) is the said axis | shaft. Hollow slab spacer characterized by having joint portions (36, 74) that can be joined to joint means (29, 67) of body (23, 62) 下筋保持部（３３、７１）、上筋保持部（３４、７２）及び上筋の浮き上がりを防止する浮上防止手段（３５、７３）を有するスペーサ本体（３２、７０）と、請求項１〜７のいずれかのボード用アンカーからなり、前記スペーサ本体（３２、７０）は前記軸体（２３、６２）の接合手段（２９、６７）と接合可能な接合部（３６、７４）を有することを特徴とする中空スラブ用スペーサ  A spacer main body (32, 70) having a lower muscle holding portion (33, 71), an upper muscle holding portion (34, 72), and a floating prevention means (35, 73) for preventing the upper muscle from rising. 7, the spacer body (32, 70) has joint portions (36, 74) that can be joined to the joint means (29, 67) of the shaft body (23, 62). Hollow slab spacer characterized by 請求項１３のスペーサにおいて、前記スペーサ本体（３２、７０）は下筋保持部（３３、７１）を有する下筋保持部材（３７、７５）と、上筋保持部（３４、７２）及び上筋浮上防止手段（３５、７３）を有する上筋保持部材（３８、７６）と、下筋保持部材（３７、７５）と上筋保持部材（３８、７６）を連結する支柱部材（３９、７７）とを有し、該支柱部材（３９、７７）が上下端に雄ねじが形成されたボルトであり、該支柱部材（３９、７７）の下端の雄ねじを前記下筋保持部材（３７、７５）に形成した雌ねじに螺着し、上端の雄ねじを前記上筋保持部材（３８、７６）に形成した雌ねじに螺着したことを特徴とする中空スラブ用スペーサ  The spacer according to claim 13, wherein the spacer main body (32, 70) includes a lower muscle holding member (37, 75) having a lower muscle holding portion (33, 71), an upper muscle holding portion (34, 72), and an upper muscle. Upper muscle holding member (38, 76) having floating prevention means (35, 73), and strut member (39, 77) for connecting lower muscle holding member (37, 75) and upper muscle holding member (38, 76) The strut members (39, 77) are bolts having male threads formed at the upper and lower ends, and the male threads at the lower ends of the strut members (39, 77) are attached to the lower muscle holding members (37, 75). A hollow slab spacer characterized in that it is screwed onto the formed female screw, and the male screw at the upper end is screwed onto the female screw formed on the upper muscle holding member (38, 76). 請求項１４のスペーサにおいて、前記下筋保持部材（３７、７５）及び上筋保持部材（３８、７６）の雌ねじが、下筋保持部材（３７、７５）及び上筋保持部材（３８、７６）に形成され、かつ、下筋保持部材（３７、７５）及び上筋保持部材（３８、７６）の側面に開口するナット装着部（４０、７８、４１、７９）に挿入、装着した金属ナット（４２、８０、４３、８１）の雌ねじであることを特徴とする中空スラブ用スペーサ  The spacer according to claim 14, wherein the female threads of the lower muscle holding member (37, 75) and the upper muscle holding member (38, 76) are a lower muscle holding member (37, 75) and an upper muscle holding member (38, 76). And a metal nut that is inserted into and attached to a nut mounting portion (40, 78, 41, 79) that is formed on the side surface of the lower bar holding member (37, 75) and the upper bar holding member (38, 76). 42, 80, 43, 81), a hollow slab spacer 請求項１２〜１５のいずれかのスペーサにおいて、前記軸体（２３）の接合手段（２９）が非円形の上頭部であり、前記スペーサ本体の接合部（３６）がスペーサ本体（３２）の下面に形成された非円形の挿入口（４４）とその奧の回転空所（４５）であり、軸体（２３）の上頭部をスペーサ本体（３２）の挿入口（４４）から回転空所（４５）に挿入し、所定角度回転することで上頭部が引き抜き不能となることを特徴とする中空スラブ用スペーサ  The spacer according to any one of claims 12 to 15, wherein the joining means (29) of the shaft body (23) is a non-circular upper head, and the joining portion (36) of the spacer body is a spacer body (32). A non-circular insertion port (44) formed on the lower surface and a rotation space (45) of the collar thereof, and the upper head of the shaft (23) is rotated from the insertion port (44) of the spacer body (32). The hollow slab spacer, wherein the upper head cannot be pulled out by being inserted into the place (45) and rotated by a predetermined angle. 請求項１６のスペーサにおいて、前記スペーサ本体（３２）の下面に位置決め片（４６）を、前記アンカー本体（２２）の基板（２４）上面に位置決め突起（４７、４８）を設け、スペーサ本体（３２）とアンカー本体（２２）を相対的に所定角度回転したときに、位置決め片（４６）が位置決め突起（４７、４８）に係合してスペーサ本体（３２）とアンカー本体（２２）とが相対的に位置決めされて回転が拘束されることを特徴とする中空スラブ用スペーサ  The spacer according to claim 16, wherein a positioning piece (46) is provided on the lower surface of the spacer body (32), and a positioning protrusion (47, 48) is provided on the upper surface of the substrate (24) of the anchor body (22). ) And the anchor body (22) are rotated relative to each other by a predetermined angle, the positioning piece (46) engages with the positioning protrusions (47, 48), and the spacer body (32) and the anchor body (22) are relative to each other. Hollow slab spacer characterized by being positioned and constraining rotation 請求項１６又は１７のスペーサにおいて、前記軸体（２３）の上部にストッパ片（５８）が、スペーサ本体（３２）の下面にストッパ突起（５９）が形成され、前記軸体（２３）とスペーサ本体（３２）とを相対的に所定角度回転したときにストッパ片（５８）がストッパ突起（５９）に当接して軸体（２３）とスペーサ本体（３２）の相対的な回転が拘束されることを特徴とする中空スラブ用スペーサ  The spacer according to claim 16 or 17, wherein a stopper piece (58) is formed on an upper portion of the shaft body (23), and a stopper projection (59) is formed on a lower surface of the spacer body (32). When the main body (32) is relatively rotated by a predetermined angle, the stopper piece (58) contacts the stopper protrusion (59) and the relative rotation between the shaft body (23) and the spacer main body (32) is restricted. Hollow slab spacer characterized by that 下筋保持部材（１７０）、上筋保持部材及び上筋の浮上を防止する浮上防止手段を有するスペーサ本体と、上部に接合手段（１６２）である螺条を有する前記軸体（１６０）を有する請求項６のボード用アンカーとからなり、前記下筋保持部材（１７０）は前記軸体（１６０）の接合手段（１６２）と接合可能な接合部（１６６）を有する中空スラブ用スペーサであって、前記接合手段（１６２）と前記接合部（１６６）とを接合したときに、前記スペーサ本体と前記下筋保持部材とが一体化し、どちらか一方を回転させると他方が共に回転することを特徴とする中空スラブ用スペーサ  The lower body holding member (170), the upper body holding member, and a spacer body having a floating prevention means for preventing the upper muscle from rising, and the shaft body (160) having a thread as a joining means (162) on the upper part. 7. The hollow slab spacer comprising the board anchor of claim 6, wherein the lower muscle holding member (170) has a joint portion (166) that can be joined to the joint means (162) of the shaft body (160). When the joining means (162) and the joining portion (166) are joined, the spacer main body and the lower muscle holding member are integrated, and when one of them is rotated, the other rotates together. Hollow slab spacer 請求項１９のスペーサにおいて、前記軸体（１６０）及び下筋保持部材（１７０）に、相互の位置合わせのための目印を設けたことを特徴とする中空スラブ用スペーサ  Spacer for hollow slabs according to claim 19, characterized in that the shaft (160) and the lower muscle holding member (170) are provided with marks for mutual alignment. 請求項１９又は２０のスペーサにおいて、前記接合部が前記下筋保持部材（１７０）に装着したナット（１６６）であり、該ナット（１６６）の上部が前記下筋保持部材（１７０）の上部に突出して下筋（５３）の移動を制限することを特徴とする中空スラブ用スペーサ  The spacer according to claim 19 or 20, wherein the joint portion is a nut (166) attached to the lower muscle holding member (170), and an upper portion of the nut (166) is located above the lower muscle holding member (170). A hollow slab spacer that protrudes and restricts movement of the lower muscle (53) 請求項１４、１５、１９、２０又は２１のスペーサにおいて、前記下筋保持部材が下筋との結束が可能なものであることを特徴とする中空スラブ用スペーサ  The spacer for hollow slabs according to claim 14, 15, 19, 20, or 21, wherein the lower muscle holding member is capable of binding with the lower muscle. 下筋保持部（１０３）上筋保持部及び上筋の浮き上がりを防止する浮上防止手段を有し、下面からボルトを突出したスペーサ本体（１０１）と、請求項８又は９のボード用アンカーとからなり、前記スペーサ本体（１０１）のボルトを前記ボード用アンカーのボルト孔に螺合することを特徴とする中空スラブ用スペーサ  A spacer main body (101) having a lower bar holding part (103) having an upper bar holding part and a levitating prevention means for preventing the upper bar from being lifted, and a bolt projecting from the lower surface, and the board anchor according to claim 8 or 9 The spacer for the hollow slab, wherein the bolt of the spacer body (101) is screwed into the bolt hole of the board anchor. 請求項２３のスペーサにおいて、前記スペーサ本体（１０１）は下筋保持部（１０３）を有する下筋保持部材（１０２）と、上筋保持部及び上筋浮上防止手段を有する上筋保持部材と、下筋保持部材（１０２）と上筋保持部材を連結する支柱部材（１０４）とを有し、前記支柱部材（１０４）が上下端に雄ねじが形成されたボルトであり、該支柱部材（１０４）の下端の雄ねじを前記下筋保持部材（１０２）の雌ねじに螺着すると共に支柱部材（１０４）の下端を下筋保持部材（１０２）の下面から下方に突出させ、上端の雄ねじを前記上筋保持部材の雌ねじに螺着したことを特徴とする中空スラブ用スペーサ  The spacer according to claim 23, wherein the spacer main body (101) includes a lower muscle holding member (102) having a lower muscle holding portion (103), an upper muscle holding member having an upper muscle holding portion and an upper muscle lifting prevention means, The strut member (102) and the strut member (104) for connecting the upper strut holding member are bolts having male screws formed on the upper and lower ends, the strut member (104). A lower end male screw is screwed onto an inner thread of the lower muscle holding member (102), and a lower end of the support member (104) is projected downward from a lower surface of the lower muscle holding member (102). Hollow slab spacer characterized by being screwed onto a female screw of a holding member 請求項７のボード用アンカーにおいて、該ボード用アンカーが型枠（５１）とその上に設けた断熱材（５２）とを複合したボードに用いるものであり、前記垂下部（６’）に脆弱に形成された破断部（３１）を設けたことを特徴とするボード用アンカー  8. The board anchor according to claim 7, wherein the board anchor is used for a board in which a formwork (51) and a heat insulating material (52) provided thereon are combined, and is vulnerable to the hanging part (6 ′). A board anchor characterized by having a break (31) formed in 請求項１２〜１８のいずれかのスペーサにおいて、前記ボード用アンカーが請求項２５のボード用アンカーであることを特徴とする中空スラブ用スペーサThe spacer for hollow slabs according to any one of claims 12 to 18, wherein the board anchor is the board anchor according to claim 25. 型枠（５１）とその上に設けた断熱材（５２）とを複合したボードに用いるボード用アンカーであって、表裏貫通する円形の貫通孔（１３１）を有する基板（１３０）の裏面の貫通孔周囲から、外側に向かって膨出する抜止部（１２４）を下端に有する垂下部（１２２）を垂下形成したアンカー本体（１２０）と、上部軸（１３２）が前記貫通孔（１３１）とほぼ同径、下部軸（１３３）がそれよりも小径に形成され、該上部軸（１３２）と下部軸（１３３）の境目が型枠（５１）と断熱材（５２）の境目付近にあり、前記貫通孔（１３１）と垂下部（１２２）の中に挿通可能で所定角度回転することで引き抜き不能となる非円形の下頭部（１３４）を下端に備えた軸体（１２１）とからなり、前記アンカー本体（１２０）をボード（５１、５２）に形成した穴に挿入すると前記基板（１３０）の背面と抜止部（１２４）の間でボード（５１、５２）を挟持してアンカー本体（１２０）がボードに固定され、このアンカー本体（１２０）に前記軸体（１２１）を挿入して所定角度回転することで前記下頭部（１３４）が前記垂下部（１２２）の下端に係合して引き抜き不能となることを特徴とするボード用アンカー  A board anchor used for a board in which a formwork (51) and a heat insulating material (52) provided on the mold (51) are combined, and penetrating the back surface of a substrate (130) having a circular through hole (131) penetrating front and back An anchor body (120) having a hanging portion (122) having a retaining portion (124) that bulges outward from the periphery of the hole at the lower end, and an upper shaft (132) are substantially the same as the through hole (131). The same diameter, the lower shaft (133) is formed with a smaller diameter, the boundary between the upper shaft (132) and the lower shaft (133) is near the boundary between the mold (51) and the heat insulating material (52), The shaft (121) is provided with a non-circular lower head (134) at the lower end that can be inserted into the through hole (131) and the hanging part (122) and cannot be pulled out by rotating at a predetermined angle. The anchor body (120) is attached to the board (51, 2), the anchor body (120) is fixed to the board by sandwiching the board (51, 52) between the back surface of the substrate (130) and the retaining portion (124). 120) The shaft (121) is inserted into 120) and rotated by a predetermined angle so that the lower head (134) engages with the lower end of the drooping portion (122) and cannot be pulled out. Anchor 請求項２７のボード用アンカーにおいて、前記垂下部（１２２）の型枠（５１）と断熱材（５２）の境目に相当する付近に脆弱に形成された破断部（１２５）を設け、前記上部軸（１３２）の直下に脆弱に形成された破断部（１３８）を設けたことを特徴とするボード用アンカーIn board anchor according to claim 2 7, breaking portion which is fragile formed in the vicinity corresponding to a boundary of the mold (51) and insulation material (52) to (125) provided in the downwardly extending portion (122), said upper Board anchor characterized by providing a fragile part (138) formed weakly just below the shaft (132) 請求項２８のボード用アンカーにおいて、前記下部軸（１３３）外周にストッパ（１３７）を突設し、前記垂下部（１２２）内面にこれに対応するストッパ受部（１２６）を突設し、前記軸体（１２１）を所定角度回転すると、前記ストッパ（１３７）が前記ストッパ受部（１２６）に当接して回転が停止し、型枠解体時には前記下頭部（１３４）を強い力で回転すると、前記ストッパ（１３７）が前記ストッパ受部（１２６）に当接しているために下部軸（１３３）と共に垂下部（１２２）の下部（１２３）が回転し、破断部（１３８）が破断して下部軸（１３３）を取り外せると共に、破断部（１２５）が破断して垂下部（１２２）の下部（１２３）を取り外せることを特徴とするボード用アンカーIn board anchor of claim 2 8, wherein the projecting stopper (137) to the lower shaft (133) outer periphery, projecting the stopper receiving portion (126) corresponding to the hanging portion (122) inner surface, When the shaft body (121) is rotated by a predetermined angle, the stopper (137) comes into contact with the stopper receiving portion (126) to stop the rotation, and the lower head (134) is rotated with a strong force when the mold is disassembled. Then, since the stopper (137) is in contact with the stopper receiving portion (126), the lower portion (123) of the hanging portion (122) rotates together with the lower shaft (133), and the breaking portion (138) is broken. The lower shaft (133) can be removed, and the broken portion (125) can be broken to remove the lower portion (123) of the hanging portion (122).
JP2003116459A 2003-04-22 2003-04-22 Anchor for board, binding tool for hollow slab using the same, and spacer for hollow slab Expired - Lifetime JP3798761B2 (en)

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