JP4070286B2 - Anchor support for formwork - Google Patents

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JP4070286B2
JP4070286B2 JP00178098A JP178098A JP4070286B2 JP 4070286 B2 JP4070286 B2 JP 4070286B2 JP 00178098 A JP00178098 A JP 00178098A JP 178098 A JP178098 A JP 178098A JP 4070286 B2 JP4070286 B2 JP 4070286B2
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anchor
mold
bush
support
formwork
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JPH11198117A (en
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英治 小杉
靖機 鈴木
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Somic Ishikawa KK
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Somic Ishikawa KK
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Description

【0001】
【発明の属する技術分野】
本発明は、例えば、型枠内にアンカを支持し、この型枠内で形成されるコンクリート製品にアンカを埋め込み固定する型枠用アンカ支持具に関する。
【0002】
【従来の技術】
従来、土木、建設において、例えば図7に示すように、コンクリート製品1にアンカ2を埋め込み、このアンカ2の頭部2aに金具を引っ掛けて、コンクリート製品1を吊り上げる構成が知られてる。そして、このアンカ2がコンクリート製品1の表面1aから突出しないように、コンクリート製品1の表面1aには半球状の凹部1bが形成され、この凹部1bの内側に、アンカ2の頭部2aが位置するようになっている。
【0003】
そして、従来、コンクリート製品1の製造時に、型枠内の所定位置にアンカ2を支持するとともに、コンクリート製品1に凹部1bを形成するために、型枠の内側に取り付けられる型枠用アンカ支持具が用いられている。そして、この型枠用アンカ支持具は、マスキング、あるいはフォーマとも呼ばれるもので、金属(鋳物)製フォーマ、ゴム製フォーマ、あるいはOリングを嵌着した硬質樹脂製フォーマが知られている。このうち、金属製フォーマは、錆びやすく、重いとともに、型抜けが悪いため、脱型時にフォーマの周辺が欠けやすく、補修を要する問題を有している。また、ゴム製フォーマは、寿命が短く、熱あるいは離型剤などの油により膨張するとともに、隙間にセメントが入りやすく、保守管理が煩雑になる問題を有している。さらに、硬質樹脂製フォーマは、型枠との間にシール性をもたせるため、別体であるゴム製のOリングが嵌着されているが、このOリングの耐久性が低く、Oリングの保守管理を怠ると、仕上がり面が悪化しやすい問題を有している。
【0004】
【発明が解決しようとする課題】
上記のように、従来の型枠用アンカ支持具は、金属製のものは、錆びやすく、重いとともに、型抜けが悪いため補修を要し、ゴム製のものは、寿命が短く、熱あるいは離型剤などの油により膨張するとともに、保守管理が煩雑になり、硬質樹脂製のものは、シール性をもたせるためのOリングの耐久性が低く、Oリングの保守管理を怠ると、仕上がり面が悪化しやすいなどの問題を有している。
【0005】
本発明は、このような点に鑑みなされたもので、取り扱いが容易で仕上がりの良好な型枠用アンカ支持具を提供することを目的とする。
【0006】
【課題を解決するための手段】
請求項1記載の型枠用アンカ支持具は、型枠内にアンカを支持し、前記型枠内で形成される成型品にアンカを埋め込み固定する型枠用アンカ支持具であって、前記型枠に着脱可能に取り付けられる支持具本体と、前記アンカに着脱可能に取り付けられかつ前記支持具本体に着脱可能に取り付けられるブッシュ体とを具備し、前記支持具本体は、外部から外部固着具が挿入して固着される雌ねじを形成したねじ部である固着受部及びこのねじ部より径寸法が小さく前記外部固着具の挿入寸法を規制するストッパ部を備え型枠に着脱可能に固着される固着具部と、この固着具部に設けられた芯体部と、およびこの芯体部を一体的に覆い前記成型品に凹部を形成する膨出部、この膨出部の基端部に位置し前記型枠に密着する弾性変形可能なリップ部、前記膨出部内に設けられ前記ブッシュ体を収納するブッシュ収納部、このブッシュ収納部に収納された前記ブッシュ体に弾性的に係合する弾性変形可能なブッシュ係合部、基端側に開口する複数の空洞部、及びこれら空洞部間に設けられたリブ部を一体に設け、前記リップ部は、これら空洞部およびリブ部を囲んで形成されたオレフィン系熱可塑性エラストマー製の樹脂部と、マグネット取付部と、このマグネット取付部に必要に応じて取り付けられるマグネット体とを備え、前記ブッシュ体は、弾性変形可能な筒状をなし、軸方向に沿って切欠部が形成され、前記アンカに着脱可能に嵌着する嵌着部と、前記ブッシュ係合部に係合される係合受部と、前記嵌着部の基端側に位置し、外周面が基端に向かって次第に径寸法が小さく形成された傾斜面と、この傾斜面に周方向に所定間隔で軸方向を長手方向として形成された挿入用の凹部とを備えたものである。
【0007】
そして、この構成では、支持具本体は固着具部を用いて型枠の内面に固着される。この時、弾性変形可能なリップ部が型枠の内面に密着する。また、アンカに嵌着したブッシュ体をブッシュ収納部に挿入すると、ブッシュ係合部が係合受部に弾性的に係合し、アンカが位置決めして支持される。この状態で、型枠内に成形材料を導入する。そして、この成形材料が固化した後、型枠を取り外すと、ブッシュ係合部と係合受部との弾性的な係合が外れ、支持具本体は型枠とともに取り外され、成型品に凹部が形成される。続いて、ブッシュ体を取り外すことにより、凹部に露出した状態のアンカが得られる。そして、支持具本体は、芯体部をオレフィン系熱可塑性エラストマー製の樹脂部で覆うとともに、この樹脂部に型枠に密着する弾性変形可能なリップ部を設けたため、離型性が容易に良好になり、成型品の表面などの仕上がりが良好になり、後処理も不要となり、作業が容易になる。また、樹脂部に、ブッシュ体に弾性的に係合する弾性変形可能なブッシュ係合部を設けたため、ブッシュ体の着脱が容易になる。さらに、弾性変形可能なリップ部およびブッシュ係合部は樹脂部に一体に形成したため、部品点数が削減されるとともに、別体の部材を取り付けた隙間に成形材料が入ることなどもなく、取り扱いが容易になる。また、芯体部を樹脂部の膨出部で一体的に覆うため、例えば、成形後のゴムの割れ口からプレート付きボルトを組み込んで用いる構成に比べて、割れ口からセメントが流れ込むことなどがなく、寿命が延長される。
【0008】
また、支持具本体の樹脂部には、基端側に開口する複数の空洞部と、これら空洞部間に設けられたリブ部とが一体に形成され、リップ部は、これら空洞部およびリブ部を囲んで形成し、樹脂部に空洞部を設けたため、樹脂部の成形が容易になるとともに、製造コストが低減される。また、空洞部間にリブ部を一体に設けたため、構造が簡略化されるとともに、樹脂部の強度が確保される。さらに、これら空洞部およびリブ部は、リップ部により囲んでシールされる。
【0009】
また、ブッシュ体の嵌着部は、弾性変形可能な筒状をなし、軸方向に沿って切欠部が形成されたので、弾性変形可能な筒状の嵌着部をアンカの外周に嵌着して、ブッシュ体がアンカに確実に嵌着されるとともに、この嵌着部を切欠部から開くことにより、ブッシュ体がアンカから容易に取り外される。
【0010】
また、ブッシュ体の基端側の外周部に、傾斜面が形成され、さらにこの傾斜面に凹部が形成されたので、ブッシュ体をブッシュ収納部に挿入する際に、摺動抵抗が低減され、また、ブッシュ体の変形が容易になり、挿入作業が容易になるとともに、全体をテーパ状にする構成に比べて抜けにくくなる。
【0011】
また、固着具部は、外部から外部固着具が挿入して固着される固着受部と、前記外部固着具の挿入寸法を規制するストッパ部とを備えたので、外部固着具の挿入寸法がストッパ部で規制されるため、外部固着具を所定寸法以上に挿入してアンカを押動してしまうなどの不具合が防止される。
【0012】
さらに、支持具本体に形成されたマグネット取付部と、このマグネット取付部に必要に応じて取り付けられるマグネット体とを具備したので、支持具本体にマグネット取付部を形成しておくことにより、このマグネット取付部に必要に応じてマグネット体を取り付け、型枠に吸着する形態の型枠用アンカ支持具として用いることが可能になる。
【0013】
【発明の実施の形態】
以下、本発明の型枠用アンカ支持具の一実施の形態を図面を参照して説明する。
【0014】
図1および図2において、11は型枠用アンカ支持具としての型枠フォーマで、この型枠フォーマ11は、成型品としてのコンクリート製品1の製造時に、型枠12内の所定位置にアンカ2を支持するとともに、この型枠12内で形成されるコンクリート製品1に凹部1bを形成するようになっている。なお、本実施の形態により支持されるアンカ2およびコンクリート製品1は従来と同様のもので、図7に示すように、土木、建設において、コンクリート製品1にアンカ2を埋め込み、このアンカ2の頭部2aに金具を引っ掛けて、コンクリート製品1を吊り上げるもので、このアンカ2がコンクリート製品1の表面1aから突出しないように、コンクリート製品1の表面1aには半球状の凹部1bが形成され、この凹部1bの内側に、アンカ2の頭部2aが位置するようになっている。
【0015】
すなわち、型枠フォーマ11は、フォーマあるいはマスキングなどとも呼ばれるもので、型枠12に着脱可能に取り付けられる支持具本体15と、アンカ2に着脱可能に取り付けられかつ支持具本体15に着脱可能に取り付けられるブッシュ体16とを備えている。
【0016】
そして、支持具本体15は、図1ないし図4に示すように、固着具部21、芯体部22、および樹脂部23を備えている。そして、固着具部21は、金属などにて形成されたナットであり、固着受部としての雌ねじを形成したねじ部21a と、このねじ部21a の先端部に位置しこのねじ部21a より径寸法の小さいストッパ部21b を備えており、いわゆる雌ねじフォーマを構成している。そして、ねじ部21a には、型枠12に形成した取付孔12a に挿入された外部固着具としての蝶ボルト25が挿入して螺合される。すなわち、この蝶ボルト25は、外周部に雄ねじ部25a が形成されているとともに、基端部につまみ部25b が形成され、雄ねじ部25a には、別体の蝶ナット26が螺合されており、この蝶ボルト25を螺合して締め付けることにより、支持具本体15が型枠12に固着されるようになっている。また、ねじ部21a の先端部には、径寸法の小さいストッパ部21b が形成されているため、蝶ボルト25はこのストッパ部21b に当たって止まり、すなわち、蝶ボルト25のねじ込み寸法が規制されている。そこで、蝶ボルト25が突出して、アンカ2を押し込み、アンカ2を移動させたり脱落させたりすることが防止されている
【0017】
また、芯体部22は、金属などにて形成され、先端側に向かって若干拡開する筒状部22a と、この筒状部22a の基端部から内側に向かい、かしめあるいは溶接などして固着具部21に固着された底板部22b と、筒状部22a の先端部から外側に折り返えされたフランジ部22c となどを備え、補強用のインサートプレートを構成している。
【0018】
さらに、樹脂部23は、固着具部21と芯体部22とを組み合わせ補強用および型枠12への取付具となるインサート部品を金型に入れて軟質樹脂を充填するインジェクション成形にて一体に形成されている。そして、軟質樹脂は、金属よりも離型性が良く、ゴムに比べて耐熱性、耐薬品性(耐油性)が良好であるとともに、一定の弾性を有するもので、例えば、オレフィン系熱可塑性エラストマーで、曲げ弾性率は、JIS K7203の試験法で5000×104 以上20000×104 以下〔N/m2 〕である。また、この樹脂部23には、固着具部21の頭部21a および芯体部22を覆い先端側に向かって半球状に突出する膨出部23a が形成されている。そして、この膨出部23a の基端部の外周部には、弾性変形可能なリップ部23b が薄肉に形成されている。そして、このリップ部23b は、型枠12への取付時に外周に広がり型枠12に弾性的に密着してシールするようになっている。また、このリップ部23b の内側に位置して、放射状に配置された板状のリブ部23c が形成されているとともに、このリブ部23c に区画されて、基端部側に開口する複数の空洞部23d が形成され、成形性および経済性が向上されている。また、この部分の強度はリブ部23c により確保されている。また、各リブ部23c には、基端側に開口する孔部23c1が形成されているとともに、これらリブ部23c の基端側の部分は、円環状のマグネット取付部23d1となっている。
【0019】
さらに、膨出部23a の中央部には、ブッシュ体16が挿入されるブッシュ収納部23e が先端側に開口して形成されている。そして、このブッシュ収納部23e は、先端側に向かって若干拡開状に形成されているとともに、開口部の部分には、内側に向かって突出する弾性変形可能なブッシュ係合部23f が形成されている。すなわち、このブッシュ収納部23e は、内部よりも入口の径寸法が小さくなっているが、ブッシュ係合部23f の内径は、樹脂部23の成形時にも無理なく金型から外すことができ、かつ、ブッシュ体16を挿入後抜けにくい寸法に設定されている。
【0020】
また、ブッシュ体16は、図1、図2、図5、および図6に示すように、ゴムにて一体に形成され、アンカ2の外周に嵌合する弾性変形可能な円筒状をなす嵌着部16a を備えている。そして、この嵌着部16a は、先端側の外周面に、ブッシュ係合部23f に弾性的に係合して抜け防止となる係合受部16b が段状に凹設されている。また、嵌着部16a の基端側は外周面が基端側に向かって次第に径寸法が小さくなる傾斜面16c として形成されているとともに、この傾斜面16c には、周方向に所定間隔で軸方向を長手方向とする挿入用の凹部16d が複数形成されている。また、この傾斜面16c の部分では、内側の空間の内径は先端側より大きく形成されている。さらに、この嵌着部16a には、軸方向に沿って切欠部16e が形成され、この切欠部16e に沿って嵌着部16a を開き、アンカ2の嵌着を解除できるようになっている。さらに、嵌着部16a の基端側の内周面は基端側に向かって次第に径寸法が大きくなる傾斜面16f として形成され、アンカ2の頭部2aの形状に沿うようになっている。
【0021】
次に、この型枠フォーマ11の使用方法を説明する。
【0022】
まず、支持具本体15のねじ部21a を型枠12の取付孔12a に内側から位置合わせし、型枠12の外側から蝶ボルト25を挿入して螺合して締め付け、支持具本体15を型枠12の内側に固定する。また、アンカ2の外周部にブッシュ体16を嵌着し、このアンカ2を嵌着したブッシュ体16を支持具本体15のブッシュ収納部23e に圧入する。この状態で、ブッシュ係合部23f と係合受部16b とが係合して抜け止めされ、アンカ2は型枠12の内側の所定の位置に支持される。そして、この状態で、型枠12の内側にセメントを充填する。
【0023】
そして、セメントが固まった後、支持具本体15を型枠12に固定したまま、型枠12を取り外す。この時、ブッシュ係合部23f と係合受部16b との弾性的な係合が外れ、図1に示すように、ブッシュ体16はアンカ2に嵌着したまま、コンクリート製品1側に残る。
【0024】
続いて、ブッシュ体16を切欠部16e で開いて取り外すことにより、図7に示すように、コンクリート製品1に凹部1bが形成されるとともに、この凹部1bに頭部2aを露出した状態でアンカ2が固定される。
【0025】
そして、本実施の形態によれば、型枠フォーマ11の支持具本体15は、表面を軟質樹脂で一体に覆い、型枠12に密着する弾性変形可能なリップ部23b も一体に形成した、いわば軟質樹脂製一体式型枠フォーマ(軟質樹脂一体フォーマ)としたため、金属製のフォーマに比べて、コンクリートの離型性が良く、仕上がりを良好にでき、脱型後のフォーマ周辺の補修も不要にして、省力化を可能にし、作業性を向上できる。また、金属製のフォーマに比べて、軽量化を図ることができる。
【0026】
また、軟質樹脂を用いたため、樹脂部23にリップ部23b を一体に形成でき、別体の耐久性の低いOリングなどを用いる必要がなく、また、セメントが入りやすい部分もないため、保守管理を容易にできる。
【0027】
さらに、軟質樹脂では、ゴムおよび硬質樹脂に比べて離型性および耐熱性、耐油性の良好な材料を容易に選択でき、このような材料を用いることにより、耐久性を向上できる。
【0028】
また、軟質樹脂製の樹脂部23には、固着具部21と芯体部22とを一体的にインサートしたため、強度を確保できるとともに、型枠12への取付具を一体的に構成できる。また、芯体部22を樹脂部23の膨出部23a で一体的に覆うため、例えば、成形後のゴムの割れ口からプレート付きボルトを組み込んで用いる構成に比べて、割れ口からセメントが流れ込むことなどがな
【0029】
さらに、樹脂部23a には、複数の空洞部23d を設けたため、樹脂部23a の成形が容易になるとともに、樹脂材料を節約し、製造コストを低減できる。また、空洞部23d 同士の間にリブ部23c を設けたため、樹脂部23a の強度を確保できる。また、これら空洞部23d およびリブ部23c は、リップ部23c により囲んでシールできる。
【0030】
また、ブッシュ体16の係合受部16b を係合保持するブッシュ係合部23f は、軟質樹脂製の樹脂部23に弾性変形可能一体に形成したため、ブッシュ体16は支持具本体15に圧入により容易に取り付けできるとともに、所定の強度で支持することができる。
【0031】
さらに、ブッシュ体16は、1か所に切欠部16e を備え、アンカ2への脱着を容易にできる。また、ブッシュ体16の外周部には、傾斜面16c を形成し、さらにこの傾斜面16c には、にがしとなる複数の凹部16d を形成したため、ブッシュ体16をブッシュ収納部23e に挿入する際に、摺動抵抗を低減でき、また、ブッシュ体16の変形を容易にでき、組み付けのかたい硬質樹脂用ブッシュのように圧入道具を要することもなく、組み込み作業を容易にできるとともに、金属用ブッシュのように、全体を傾斜の大きいテーパ面とする構成に比べて、セット後に抜けにくくできる。
【0032】
さらに、図8および図9に示すように、支持具本体15には、あらかじめマグネット取付部23d1が形成されているため、このマグネット取付部23d1にマグネット体Mを取り付けることにより、型枠に吸着する形態の型枠用アンカ支持具であるいわゆるマグネットフォーマとして用いることができる。すなわち、このマグネット体Mは、円環状の磁石本体M1 と、型枠側を除いてこの磁石本体M1 を覆うヨークM2 とを備えているとともに、4か所に通孔M3 が形成されている。そして、このマグネット体Mは、マグネット取付部23d1に嵌め込まれた状態で、各通孔M3 に挿入されたビスM4 を、支持具本体15のリブ部23c の孔部23c1に螺合して固定される。
【0033】
そして、この構成では、支持具本体15にマグネット取付部23d1を形成しておくことにより、このマグネット取付部23d1に必要に応じてマグネット体Mを取り付けて用いることができる。そこで、マグネットを一体的にインサート形成する型枠用アンカ支持具を用いる構成に比べ、汎用性を向上でき、製造の点では、金型を別個に製造する必要がなく、金型の製造コストを低減できるとともに、販売および使用の際には、種類が減るため在庫管理を容易にして、管理コストを低減でき、さらに、ユーザーは、必要に応じてマグネット体Mを後付けして用いることにより、用途を広げることができる。
【0034】
なお、芯体部22は、固着具部21に一体に形成することもできる。
【0035】
【発明の効果】
請求項1記載の型枠用アンカ支持具によれば、支持具本体は、芯体部をオレフィン系熱可塑性エラストマー製の樹脂部で覆うとともに、この樹脂部に型枠に密着する弾性変形可能なリップ部を設けたため、離型性を容易に良好にでき、成型品の表面などの仕上がりを良好にでき、後処理も不要として、作業を容易にできる。また、樹脂部に、ブッシュ体に弾性的に係合する弾性変形可能なブッシュ係合部を設けたため、ブッシュ体の着脱を容易にできる。さらに、弾性変形可能なリップ部およびブッシュ係合部は樹脂部に一体に形成したため、部品点数を削減できるとともに、別体の部材を取り付けた隙間に成形材料が入ることなどもなく、取り扱いを容易にできる。また、芯体部を樹脂部の膨出部で一体的に覆うため、例えば、成形後のゴムの割れ口からプレート付きボルトを組み込んで用いる構成に比べて、割れ口からセメントが流れ込むことなどがなく、寿命を延長できる。また、樹脂部に空洞部を設けたため、樹脂部の成形を容易にできるとともに、製造コストを低減できる。また、空洞部間にリブ部を一体に設けたため、構造を簡略化できるとともに、樹脂部の強度を確保できる。さらに、これら空洞部およびリブ部は、リップ部により囲んでシールできる。また、弾性変形可能な筒状の嵌着部をアンカの外周に嵌着して、ブッシュ体をアンカに確実に嵌着できるとともに、この嵌着部を切欠部から開くことにより、ブッシュ体をアンカから容易に取り外しできる。また、ブッシュ体の基端側の外周部に、傾斜面が形成され、さらにこの傾斜面に凹部を形成したため、ブッシュ体をブッシュ収納部に挿入する際に、摺動抵抗を低減し、また、ブッシュ体の変形を容易にして、挿入作業を容易にできるとともに、全体をテーパ状にする構成に比べて抜けにくくできる。また、固着具部に、外部から外部固着具が挿入して固着される固着受部と、外部固着具の挿入寸法を規制するストッパ部とを備えることにより、外部固着具の挿入寸法がストッパ部で規制されるため、外部固着具を所定寸法以上に挿入してアンカを押動してしまうなどの不具合を防止できる。さらに、支持具本体にマグネット取付部を形成しておくことにより、このマグネット取付部に必要に応じてマグネット体を取り付け、型枠に吸着する形態の型枠用アンカ支持具として用いることできる。そこで、マグネットを一体的にインサート形成する型枠用アンカ支持具を用いる構成に比べ、汎用性を向上し、金型の製造コストおよび在庫の管理コストを低減できる。
【図面の簡単な説明】
【図1】 本発明の一実施の形態を示す型枠用アンカ支持具を用いた作業工程の説明図である。
【図2】 同上型枠用アンカ支持具の分解斜視図である。
【図3】 同上型枠用アンカ支持具の支持具本体の断面図である。
【図4】 同上型枠用アンカ支持具の支持具本体を基端側から見た底面図である。
【図5】 同上型枠用アンカ支持具のブッシュ体の一部を切り欠いた断面図である。
【図6】 同上型枠用アンカ支持具のブッシュ体を基端側から見た底面図である。
【図7】 成型品およびアンカを示す説明図である。
【図8】 同上型枠用アンカ支持具にマグネット体を取り付けて使用する使用例を示す分解状態の断面図である。
【図9】 同上マグネット体の斜視図である
【符号の説明】
1 成型品としてのコンクリート製品
2 アンカ
11 型枠用アンカ支持具としての型枠フォーマ
12 型枠
15 支持具本体
16 ブッシュ体
16a 嵌着部
16b 係合受部
16c 傾斜面
16d 凹部
16e 切欠部
21 固着具部
21a 固着受部としてのねじ部
21b ストッパ部
22 芯体部
23 樹脂部
23a 膨出部
23b リップ部
23c リブ部
23d 空洞部
23d1 マグネット取付部
23e ブッシュ収納部
23f ブッシュ係合部
25 外部固着具としての蝶ボルト
M マグネット体
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an anchor support for a mold, for example, which supports an anchor in a mold and embeds and fixes the anchor in a concrete product formed in the mold.
[0002]
[Prior art]
Conventionally, in civil engineering and construction, for example, as shown in FIG. 7, a structure in which an anchor 2 is embedded in a concrete product 1 and a metal fitting is hooked on a head 2 a of the anchor 2 to lift the concrete product 1 is known. And the hemispherical recessed part 1b is formed in the surface 1a of the concrete product 1 so that this anchor 2 may not protrude from the surface 1a of the concrete product 1, and the head 2a of the anchor 2 is located inside the recessed part 1b. It is supposed to be.
[0003]
Conventionally, when the concrete product 1 is manufactured, the anchor 2 is supported at a predetermined position in the mold, and the anchor support for the mold is attached to the inside of the mold in order to form the recess 1b in the concrete product 1. Is used. This formwork anchor support is also called a masking or former, and a metal (casting) former, a rubber former, or a hard resin former fitted with an O-ring is known. Among these, the metal former is easily rusted and heavy, and the mold is not easily removed, so that the periphery of the former is easily chipped at the time of demolding and has a problem that requires repair. In addition, rubber formers have a problem that they have a short life, expand due to heat or oil such as a mold release agent, and cement easily enters gaps, which makes maintenance management complicated. In addition, the hard resin former has a rubber O-ring, which is a separate body, to provide a sealing property between the mold and the formwork. However, the durability of the O-ring is low, and maintenance of the O-ring is difficult. If management is neglected, there is a problem that the finished surface tends to deteriorate.
[0004]
[Problems to be solved by the invention]
As described above, the conventional anchor support for a formwork is rusted and heavy when it is made of metal, and it needs to be repaired due to poor mold removal. In addition to expansion due to oil such as molds, maintenance management becomes complicated. Hard plastic products have low durability of the O-ring for providing sealing performance, and if the O-ring maintenance management is neglected, the finished surface will be It has problems such as being easy to get worse.
[0005]
The present invention has been made in view of these points, and an object thereof is to provide an anchor support for a formwork that is easy to handle and has a good finish.
[0006]
[Means for Solving the Problems]
The anchor support for a formwork according to claim 1 is an anchor support for a formwork that supports the anchor in the formwork and embeds and fixes the anchor in a molded product formed in the formwork. a support body detachably mounted on the frame, removably attached to the anchor and comprising a said support bushing member detachably mounted on the main body, the support body, the external fixation device from the outside A fixing receiving part that is a threaded part that forms a female screw to be inserted and fixed, and a stopper part that is smaller in diameter than the threaded part and restricts the insertion dimension of the external fixing tool, and is fixed to the mold detachably. A tool part, a core part provided in the fixing part, a bulge part that integrally covers the core part and forms a recess in the molded product, and is located at a base end part of the bulge part Elastically deformable lip portion that is in close contact with the mold Bush accommodating portion for accommodating the bushing member provided in the bulging portion, open to the bushing body housed in the bush housing portion elastically deformable bushing engaging portion resiliently engages, the proximal end side A plurality of cavities and rib portions provided between the cavities are provided integrally, and the lip portion includes a resin portion made of an olefin-based thermoplastic elastomer formed around the cavities and the rib portions, and a magnet. An attachment portion and a magnet body attached to the magnet attachment portion as needed are provided. The bush body has a cylindrical shape that can be elastically deformed , a notch portion is formed along an axial direction, and is attached to and detached from the anchor. A fitting portion that can be fitted, an engagement receiving portion that is engaged with the bush engaging portion, a proximal end side of the fitting portion, and an outer peripheral surface gradually increasing in diameter toward the proximal end; Formed small The inclined surface, in which a recess for insertion formed in the axial direction as the longitudinal direction at predetermined intervals on the inclined surface in the circumferential direction.
[0007]
And in this structure, a support tool main body is fixed to the inner surface of a formwork using a fixing tool part. At this time, the elastically deformable lip portion is in close contact with the inner surface of the mold. When the bush body fitted to the anchor is inserted into the bush housing portion, the bush engaging portion is elastically engaged with the engagement receiving portion, and the anchor is positioned and supported. In this state, the molding material is introduced into the mold. Then, after the molding material is solidified, when the mold is removed, the elastic engagement between the bush engaging portion and the engagement receiving portion is released, the support body is removed together with the mold, and the molded product has a recess. It is formed. Subsequently, by removing the bush body, the anchor exposed in the recess is obtained. And the support body has a core part covered with a resin part made of olefin-based thermoplastic elastomer, and an elastically deformable lip part that adheres closely to the mold is provided on this resin part, so that the releasability is easily good. As a result, the finished surface of the molded product is improved, post-processing is not required, and the work is facilitated. Further, since the elastically deformable bush engaging portion that elastically engages the bush body is provided in the resin portion, the bush body can be easily attached and detached. In addition, since the elastically deformable lip and bush engaging part are formed integrally with the resin part, the number of parts is reduced, and the molding material does not enter the gap where a separate member is attached. It becomes easy. Also, since the core part is integrally covered with the bulging part of the resin part, for example, cement flows into the cracked part compared to a configuration in which a bolt with a plate is incorporated from the molded part of the rubber after molding. There is no longer life.
[0008]
In addition, a plurality of cavities that open to the base end side and rib portions provided between the cavities are integrally formed on the resin portion of the support body, and the lip portion includes these cavities and rib portions. was enclosing formation, due to the provision of a cavity in the resin portion, together with the molding of the resin portion is facilitated, the manufacturing cost can be reduced. Further, since the rib portion is integrally provided between the hollow portions, the structure is simplified and the strength of the resin portion is ensured. Further, the hollow portion and the rib portion are surrounded and sealed by the lip portion.
[0009]
Further, fitting portions of the bushing body, without an elastically deformable tubular shape, since notch along the axial direction is formed, fitted elastically deformable tubular fitting portion on the outer periphery of the anchor Thus, the bush body is securely fitted to the anchor, and the bush body is easily detached from the anchor by opening the fitting portion from the notch.
[0010]
In addition, since an inclined surface is formed on the outer peripheral portion on the proximal end side of the bush body, and a recess is formed on the inclined surface , sliding resistance is reduced when the bush body is inserted into the bush housing portion, Further, the deformation of the bush body is facilitated, the insertion work is facilitated, and it becomes difficult to come out as compared with the configuration in which the whole is tapered.
[0011]
In addition, since the fixing part includes a fixing receiving part to which the external fixing tool is inserted and fixed from the outside and a stopper part for restricting the insertion dimension of the external fixing tool, the insertion dimension of the external fixing tool is the stopper. Therefore, it is possible to prevent problems such as inserting the external fixing tool to a predetermined dimension or more and pushing the anchor.
[0012]
Furthermore, a magnet mounting portion formed on the support body, since and a magnet member mounted optionally on the magnet mounting portion, by forming the magnet mounting portion to the bracket body, the magnet A magnet body can be attached to the attachment portion as necessary, and can be used as an anchor support for a formwork that is attracted to the formwork.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an anchor support for a mold according to the present invention will be described with reference to the drawings.
[0014]
In FIG. 1 and FIG. 2, 11 is a form former as an anchor support for the form, and this form former 11 is placed at a predetermined position in the form 12 when the concrete product 1 as a molded product is manufactured. And a recess 1b is formed in the concrete product 1 formed in the mold 12. The anchor 2 and the concrete product 1 supported by the present embodiment are the same as the conventional ones. As shown in FIG. 7, the anchor 2 is embedded in the concrete product 1 in civil engineering and construction, and the head of the anchor 2 is placed. The metal product 1 is lifted by hooking a metal fitting on the part 2a, and a hemispherical recess 1b is formed on the surface 1a of the concrete product 1 so that the anchor 2 does not protrude from the surface 1a of the concrete product 1. The head 2a of the anchor 2 is positioned inside the recess 1b.
[0015]
That is, the form former 11 is also called a former or masking, and is a support body 15 that is detachably attached to the form 12 and a detachable attachment to the anchor 2 and detachably attached to the support body 15. The bush body 16 is provided.
[0016]
And the support tool main body 15 is provided with the fixing | fixed tool part 21, the core part 22, and the resin part 23, as shown in FIG. The fixing tool portion 21 is a nut formed of metal or the like, and has a screw portion 21a in which a female screw is formed as a fixing receiving portion, and is positioned at the tip of the screw portion 21a and has a diameter dimension from the screw portion 21a. Is provided with a small stopper portion 21b to constitute a so-called female screw former. Then, a butterfly bolt 25 as an external fixing tool inserted into the mounting hole 12a formed in the mold 12 is inserted into the screw portion 21a and screwed. That is, the butterfly bolt 25 has a male screw portion 25a formed on the outer peripheral portion and a knob portion 25b formed on the base end portion, and a separate butterfly nut 26 is screwed to the male screw portion 25a. The support body 15 is fixed to the mold 12 by screwing and tightening the butterfly bolt 25. Further, since a stopper portion 21b having a small diameter is formed at the tip of the screw portion 21a, the butterfly bolt 25 stops against the stopper portion 21b, that is, the screwing size of the butterfly bolt 25 is restricted. Therefore, the butterfly bolt 25 protrudes and the anchor 2 is pushed in to prevent the anchor 2 from being moved or dropped .
[0017]
The core portion 22 is formed of a metal or the like, and has a cylindrical portion 22a that slightly expands toward the distal end side, and is inwardly caulked or welded from the base end portion of the cylindrical portion 22a. The reinforcing plate 21 includes a bottom plate portion 22b fixed to the fixing portion 21 and a flange portion 22c folded back from the distal end portion of the cylindrical portion 22a.
[0018]
Further, the resin part 23 is integrally formed by injection molding in which the fixing part 21 and the core part 22 are combined and the insert part for reinforcing and attaching to the mold 12 is put in a mold and filled with a soft resin. Is formed. The soft resin has better releasability than metal, has better heat resistance and chemical resistance (oil resistance) than rubber, and has a certain elasticity. For example, an olefin-based thermoplastic elastomer The flexural modulus is 5000 × 10 4 or more and 20000 × 10 4 or less [N / m 2 ] according to the test method of JIS K7203. Further, the resin portion 23 is formed with a bulging portion 23a that covers the head portion 21a and the core portion 22 of the fixing member portion 21 and protrudes in a hemispherical shape toward the distal end side. An elastically deformable lip portion 23b is formed thin on the outer peripheral portion of the base end portion of the bulging portion 23a. The lip portion 23b extends to the outer periphery when attached to the mold 12 and is elastically adhered to the mold 12 for sealing. A plate-like rib portion 23c arranged radially is formed inside the lip portion 23b, and a plurality of cavities that are partitioned by the rib portion 23c and open to the base end side are formed. The portion 23d is formed, and the moldability and economy are improved. Further, the strength of this portion is ensured by the rib portion 23c. Each rib portion 23c is formed with a hole 23c1 that opens to the base end side, and the base end side portion of the rib portion 23c is an annular magnet attachment portion 23d1.
[0019]
Further, a bush housing portion 23e into which the bush body 16 is inserted is formed at the center of the bulging portion 23a so as to open to the tip side. The bush accommodating portion 23e is formed in a slightly expanded shape toward the distal end side, and an elastically deformable bush engaging portion 23f that protrudes inward is formed in the opening portion. ing. In other words, the bush storage portion 23e has a smaller inlet diameter than the inside, but the inner diameter of the bush engagement portion 23f can be removed from the mold without difficulty even when the resin portion 23 is molded, and The dimensions are set so that the bushing 16 is not easily removed after insertion.
[0020]
As shown in FIGS. 1, 2, 5, and 6, the bush body 16 is integrally formed of rubber, and is an elastically deformable cylindrical fitting that fits on the outer periphery of the anchor 2. A portion 16a is provided. Further, the fitting portion 16a has a stepped concave engagement receiving portion 16b which is elastically engaged with the bush engaging portion 23f and prevents the fitting portion 16b from coming off. Further, the base end side of the fitting portion 16a is formed as an inclined surface 16c whose outer peripheral surface gradually decreases in diameter toward the base end side, and the inclined surface 16c is provided with a shaft at a predetermined interval in the circumferential direction. A plurality of insertion recesses 16d whose direction is the longitudinal direction are formed. Further, in this inclined surface 16c portion, the inner diameter of the inner space is formed larger than the tip side. Further, a notch 16e is formed in the fitting part 16a along the axial direction, and the fitting part 16a is opened along the notch 16e so that the anchor 2 can be released. Furthermore, the inner peripheral surface on the proximal end side of the fitting portion 16a is formed as an inclined surface 16f having a diameter that gradually increases toward the proximal end side, and conforms to the shape of the head 2a of the anchor 2.
[0021]
Next, how to use the form former 11 will be described.
[0022]
First, the threaded portion 21a of the support body 15 is aligned with the mounting hole 12a of the mold 12 from the inside, and a butterfly bolt 25 is inserted from the outside of the mold 12 and screwed together to tighten the support body 15 to the mold. Fix inside the frame 12. Further, the bush body 16 is fitted on the outer peripheral portion of the anchor 2, and the bush body 16 fitted with the anchor 2 is press-fitted into the bush housing portion 23 e of the support body 15. In this state, the bush engaging portion 23f and the engagement receiving portion 16b are engaged and prevented from being detached, and the anchor 2 is supported at a predetermined position inside the mold 12. In this state, the inside of the mold 12 is filled with cement.
[0023]
After the cement has hardened, the mold 12 is removed while the support body 15 is fixed to the mold 12. At this time, the elastic engagement between the bush engaging portion 23f and the engagement receiving portion 16b is released, and the bush body 16 remains on the concrete product 1 side while being fitted to the anchor 2 as shown in FIG.
[0024]
Subsequently, by opening and removing the bush body 16 at the notch 16e, as shown in FIG. 7, a recess 1b is formed in the concrete product 1, and the anchor 2 is exposed with the head 2a exposed to the recess 1b. Is fixed.
[0025]
According to the present embodiment, the support body 15 of the mold former 11 is integrally covered with a soft resin, and the elastically deformable lip portion 23b that is in close contact with the mold 12 is also integrally formed. Because it is made of a soft resin integrated form former (soft resin integrated former), it has better mold releasability and finishes better than a metal former, eliminating the need for repair around the former after demolding. This makes it possible to save labor and improve workability. Further, the weight can be reduced as compared with a metal former.
[0026]
Since soft resin is used, the lip part 23b can be formed integrally with the resin part 23, and there is no need to use a separate low-durability O-ring. Can be easily done.
[0027]
Furthermore, in the case of soft resin, a material having good release property, heat resistance and oil resistance can be easily selected as compared with rubber and hard resin, and durability can be improved by using such a material.
[0028]
In addition, since the fixing member portion 21 and the core body portion 22 are integrally inserted into the resin portion 23 made of soft resin, the strength can be ensured and the attachment tool to the mold 12 can be integrally configured. In addition, since the core body portion 22 is integrally covered with the bulging portion 23a of the resin portion 23, for example, cement flows in from the crack as compared with a configuration in which a bolt with a plate is incorporated from a rubber crack after molding. such as it is not the name.
[0029]
Further, since the resin portion 23a is provided with a plurality of hollow portions 23d, the resin portion 23a can be easily molded, the resin material can be saved, and the manufacturing cost can be reduced. Further, since the rib portion 23c is provided between the hollow portions 23d, the strength of the resin portion 23a can be ensured. Further, the hollow portion 23d and the rib portion 23c can be sealed by being surrounded by the lip portion 23c.
[0030]
Further, since the bush engaging portion 23f that engages and holds the engagement receiving portion 16b of the bush body 16 is formed integrally with the resin portion 23 made of a soft resin so as to be elastically deformable, the bush body 16 is pressed into the support body 15 by press fitting. It can be easily attached and can be supported with a predetermined strength.
[0031]
Further, the bush body 16 is provided with a notch 16e at one place, and can be easily attached to and detached from the anchor 2. In addition, an inclined surface 16c is formed on the outer peripheral portion of the bush body 16, and a plurality of concave portions 16d that are nicked are formed on the inclined surface 16c, so that the bush body 16 is inserted into the bush housing portion 23e. In this case, the sliding resistance can be reduced, the deformation of the bushing body 16 can be facilitated, and there is no need for a press-in tool like the hard resin bushing that is difficult to assemble. Compared to a configuration in which the entire surface is a tapered surface having a large inclination, such as a bush, it is difficult to come off after setting.
[0032]
Further, as shown in FIGS. 8 and 9, since the magnet attachment portion 23d1 is formed in the support body 15 in advance, the magnet body M is attached to the magnet attachment portion 23d1 to be attracted to the mold. It can be used as a so-called magnet former which is an anchor support for a formwork in a form. That is, the magnet body M includes an annular magnet body M1 and a yoke M2 that covers the magnet body M1 except for the formwork side, and has four through holes M3. The magnet body M is fixed by screwing the screws M4 inserted into the through holes M3 into the hole portions 23c1 of the rib portions 23c of the support body 15 in a state where the magnet body M is fitted into the magnet mounting portion 23d1. The
[0033]
In this configuration, by forming the magnet attachment portion 23d1 on the support body 15, the magnet body M can be attached to the magnet attachment portion 23d1 as necessary. Therefore, compared to a configuration using an anchor support for a mold that integrally inserts a magnet, the versatility can be improved, and in terms of manufacturing, it is not necessary to manufacture the mold separately, and the manufacturing cost of the mold is reduced. In addition, the number of types can be reduced during sales and use, making inventory management easier and reducing the management cost. Furthermore, the user can use the magnet body M as a retrofit if necessary. Can be spread.
[0034]
The core part 22 can also be formed integrally with the fixing part 21.
[0035]
【The invention's effect】
According to the anchor support for a mold according to claim 1, the support main body covers the core part with the resin part made of olefin-based thermoplastic elastomer and is elastically deformable so as to be in close contact with the mold on the resin part. Since the lip portion is provided, the releasability can be easily improved, the finish of the surface of the molded product can be improved, and post-processing is not required, and the operation can be facilitated. Moreover, since the elastically deformable bush engaging portion that elastically engages with the bush body is provided in the resin portion, the bush body can be easily attached and detached. In addition, the elastically deformable lip and bushing engagement parts are formed integrally with the resin part, so that the number of parts can be reduced and the molding material does not enter the gaps where separate members are attached. Can be. Also, since the core part is integrally covered with the bulging part of the resin part, for example, cement flows into the cracked part compared to a configuration in which a bolt with a plate is incorporated from the molded part of the rubber after molding. And can extend the service life. Moreover, since the cavity part was provided in the resin part, while being able to shape | mold a resin part easily, manufacturing cost can be reduced. Further, since the rib portion is provided integrally between the hollow portions, the structure can be simplified and the strength of the resin portion can be ensured. Furthermore, these cavities and ribs can be enclosed and sealed by the lip. In addition, an elastically deformable cylindrical fitting portion can be fitted to the outer periphery of the anchor so that the bushing body can be securely fitted to the anchor, and the bushing body can be opened by opening the fitting portion from the notch portion. Can be easily removed from. In addition, since an inclined surface is formed on the outer peripheral portion on the base end side of the bush body, and a recess is formed on the inclined surface, when the bush body is inserted into the bush housing portion, sliding resistance is reduced, and The bush body can be easily deformed, the insertion work can be facilitated, and the entire body can be more easily removed as compared with the configuration having a tapered shape. In addition, the fixing portion is provided with a fixing receiving portion to which the external fixing tool is inserted and fixed from the outside, and a stopper portion for restricting the insertion size of the external fixing tool, so that the insertion size of the external fixing tool is the stopper portion. Therefore, it is possible to prevent problems such as inserting the external fixing tool to a predetermined dimension or more and pushing the anchor. Furthermore, by forming a magnet attachment portion on the support body, a magnet body can be attached to the magnet attachment portion as necessary and used as an anchor support for a formwork that is attracted to the formwork. Therefore, the versatility can be improved and the manufacturing cost of the mold and the management cost of the inventory can be reduced as compared with the configuration using the anchor support for the formwork in which the magnet is integrally formed.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram of a working process using a mold anchor support tool according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the anchor support for the formwork.
FIG. 3 is a cross-sectional view of a support body of the anchor support for a formwork as above.
FIG. 4 is a bottom view of the support body of the anchor support for the formwork as seen from the base end side.
FIG. 5 is a cross-sectional view in which a part of a bush body of the anchor support for a formwork is cut out.
FIG. 6 is a bottom view of the bushing body of the anchor support for the formwork as seen from the base end side.
FIG. 7 is an explanatory view showing a molded product and an anchor.
FIG. 8 is a sectional view in an exploded state showing an example of use in which the magnet body is attached to the anchor support for the formwork.
FIG. 9 is a perspective view of the magnet body .
[Explanation of symbols]
1 Concrete products as molded products 2 Anchors
11 Formwork former as anchor support for formwork
12 formwork
15 Support body
16 Bush body
16a fitting part
16b engagement receiver
16c inclined surface
16d recess
16e Notch
21 Fastener part
21a Threaded part as fixed receiving part
21b Stopper section
22 Core part
23 Resin section
23a bulge
23b Lip part
23c Rib part
23d cavity
23d1 Magnet mounting part
23e Bush compartment
23f Bushing engagement part
25 Butterfly bolt as an external fixture M Magnet body

Claims (1)

型枠内にアンカを支持し、前記型枠内で形成される成型品にアンカを埋め込み固定する型枠用アンカ支持具であって、
前記型枠に着脱可能に取り付けられる支持具本体と、前記アンカに着脱可能に取り付けられかつ前記支持具本体に着脱可能に取り付けられるブッシュ体とを具備し、
前記支持具本体は、
外部から外部固着具が挿入して固着される雌ねじを形成したねじ部である固着受部及びこのねじ部より径寸法が小さく前記外部固着具の挿入寸法を規制するストッパ部を備え型枠に着脱可能に固着される固着具部と、
この固着具部に設けられた芯体部と、
およびこの芯体部を一体的に覆い前記成型品に凹部を形成する膨出部、この膨出部の基端部に位置し前記型枠に密着する弾性変形可能なリップ部、前記膨出部内に設けられ前記ブッシュ体を収納するブッシュ収納部、このブッシュ収納部に収納された前記ブッシュ体に弾性的に係合する弾性変形可能なブッシュ係合部、基端側に開口する複数の空洞部、及びこれら空洞部間に設けられたリブ部を一体に設け、前記リップ部は、これら空洞部およびリブ部を囲んで形成されたオレフィン系熱可塑性エラストマー製の樹脂部と
マグネット取付部と、
このマグネット取付部に必要に応じて取り付けられるマグネット体とを備え、
前記ブッシュ体は、
弾性変形可能な筒状をなし、軸方向に沿って切欠部が形成され、前記アンカに着脱可能に嵌着する嵌着部と、
前記ブッシュ係合部に係合される係合受部と
前記嵌着部の基端側に位置し、外周面が基端に向かって次第に径寸法が小さく形成された傾斜面と、
この傾斜面に周方向に所定間隔で軸方向を長手方向として形成された挿入用の凹部とを備えた
ことを特徴とする型枠用アンカ支持具。
An anchor support for a mold that supports the anchor in the mold and embeds and fixes the anchor in a molded product formed in the mold,
A support body detachably attached to the mold, and a bushing body detachably attached to the anchor and detachably attached to the support body,
The support body is
A fixing receiving portion which is a screw portion forming a female screw to which an external fixing tool is inserted and fixed from the outside, and a stopper portion which is smaller in diameter than this screw portion and regulates the insertion size of the external fixing tool, and is attached to and detached from the mold A fixing part which can be fixed;
A core part provided in the fixing part,
And a bulging portion that integrally covers the core body portion to form a recess in the molded product, an elastically deformable lip portion that is located at a proximal end portion of the bulging portion and is in close contact with the mold, and the bulging portion A bush housing portion that houses the bush body, an elastically deformable bush engagement portion that elastically engages the bush body housed in the bush housing portion, and a plurality of hollow portions that open to the base end side And a rib portion provided between the hollow portions, and the lip portion includes a resin portion made of an olefin-based thermoplastic elastomer formed so as to surround the hollow portion and the rib portion ;
A magnet mounting portion;
It has a magnet body that is attached to this magnet mounting part as needed ,
The bush body is
An elastically deformable cylindrical shape, a notch portion is formed along the axial direction, and a fitting portion that is detachably fitted to the anchor; and
An engagement receiving portion engaged with the bush engagement portion ;
An inclined surface that is located on the base end side of the fitting portion, and the outer peripheral surface is formed with a gradually decreasing radial dimension toward the base end;
An anchor support for a formwork, comprising: an inclined recess formed on the inclined surface with the axial direction as a longitudinal direction at predetermined intervals in the circumferential direction .
JP00178098A 1998-01-07 1998-01-07 Anchor support for formwork Expired - Lifetime JP4070286B2 (en)

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Application Number Priority Date Filing Date Title
JP00178098A JP4070286B2 (en) 1998-01-07 1998-01-07 Anchor support for formwork

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JP4070286B2 true JP4070286B2 (en) 2008-04-02

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4551550B2 (en) * 1999-12-28 2010-09-29 株式会社フレックスシステム Concrete embedded anchor, anchor fitting, and method of manufacturing a concrete molded product using the same
JP2001269916A (en) * 2000-03-23 2001-10-02 Flex Syst:Kk Anchor embedded in concrete and method of manufacturing concrete products using it
JP4667351B2 (en) * 2006-12-13 2011-04-13 松岡コンクリート工業株式会社 Mold structure for concrete block, holder used for mold structure for concrete block, and method for producing concrete block

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