【０００１】
【発明の属する技術分野】
本発明は、各種の建造物における床スラブ等の内部に埋設して、スラブ内に中空部を形成してスラブ厚さ（成り）を大きく形成する補強用メッシュ筋付き有孔メタルプレート製ボイド及びそのボイド端部閉鎖用キャップに関する。
【０００２】
【従来の技術】
各種の建造物の床スラブ内に埋設して、内部に中空部を形成してスラブ高さ（成り）を大きくして施工する従来のボイドは、金属製又は構成樹脂製の筒状ボイドが一般的になつているが、最近は、帯状金属板をスパイラルに形成したスパイラル帯状金属板製筒状ボイドや発泡スチロールで形成した発泡スチロール製筒状ボイドが開発されている。
【０００３】
【発明が解決しようとする課題】
前記のスパイラル帯状金属板製筒状ボイドは、比較的に重量物に形成されて作業性や施工性とともにコンクリート付着性やコンクリート補強性に欠けるなどの課題がある。発泡スチロール製筒状ボイドは、軽量に特徴があるがスラブ施工に重要なコンクリート補強性に欠けるなどの課題がある。
【０００４】
本発明は、前記のような課題を解決するために開発されたものであって、その目的とする処は、軽量化して作業性、施工性を高めるとともにコンクリートとの付着性やコンクリート補強性を高めてスラブ施工性、信頼性を向上した補強用メッシュ筋付き有孔メタルプレート製ボイドとそのボイド端部閉鎖用キャップを提供するにある。
【０００５】
【課題を解決するための手段】
本発明は、前記のような構成からなり多数の小孔を形成した有孔薄鉄板に補強用としてメッシュ筋を溶接して組み合わせた補強用メッシュ筋付き有孔メタルプレートに形成して、この有孔メタルプレートを複数の折曲線で折曲して上面部と両側面部及び突出下面部を具備した下向き溝形状に構成し、又は前記の上面部と両側面部とを具備した下向き溝形状に構成し、又は前記の上面部と両側面部とともに下面部を具備して筒状に構成したスラブ形成用の補強用メッシュ筋付き有孔メタルプレート製ボイドに特徴を有する。
【０００６】
また、前記の補強用メッシュ筋付き有孔メタルプレート製ボイドの端部形状に対応させて形成した閉鎖面部とその一面側に付設した嵌合部とからなり、前記の有孔メタルプレート製ボイドの端面に嵌着して使用するポイド端部閉鎖用キャップに特徴を有する。
【０００７】
前記の補強用メッシュ筋付き有孔メタルプレート製ボイドは、ほぼ全域的に多数の小孔を形成した有孔薄鉄板と補強用メッシュ筋とを溶接して重合し組み合わせた補強用メッシュ筋付き有孔メタルプレートによつて製造され、軽量で補強されて低コストで提供されるとともに、スラブ施工部に容易に搬入されて所要の箇所に精度良く配置されて変形し難い。前記の有孔メタルプレート製ボイド内へのコンクリートの流入は、ポイド端部ではボイド端部閉鎖用キャップの嵌着によつて防止され、下向き溝形状の下側開口部では、２段階のコンクリート打設によつて解消され、その上面部や側面部及び下面部では、コンクリート中の骨材によって各小孔が目詰まりされてコンクリートミルクの流通が程よく阻止されその内側に中空部が効果的に形成される。また、上面部や側面部及び下面部が中空部周壁のコンクリート内に程良く埋設されてコンクリート補強筋として効果的に機能されるとともに、スラブ内層部の養生、硬化が促進されてスラブ内外部が均質に速く施工されるなど、スラブのスラブ構築の作業性、施工性、信頼性が効果的に高められている。
【０００８】
【発明の実施の形態】
図１に本発明の補強用メッシュ筋付き有孔メタルプレート製ボイドを製造する補強用メッシュ筋付き有孔メタルプレートの一実施例、図２に本発明の補強用メツシユ鉄筋付き有孔薄鉄板製ボイドの第１実施例、図３Ａ，Ｂにその第２実施例及び第３実施例、図４Ａ，Ｂにボイド端部を閉鎖するボイド端部閉鎖用キャップの第１実施例及び第２実施例、図５に床スラブ施工の一実施例を示している。図中５は有孔薄鉄板、８は補強用メッシュ筋、９は有孔薄鉄板と補強用メッシュ筋との溶接、１０は補強用メッシュ筋付き有孔メタルプレート、２０ａはその有孔メタルプレートによつて形成された上面部１０ａと両側面部１０ｂ及び突出下面部１０ｃを具備して下向き溝状に形成された補強用メッシュ筋付き有孔メタルプレート製ボイド（第１実施例）、２０ｂはその上面部と両側面部を具備して下向き溝状に形成された補強用メッシュ筋付き有孔メタルプレート製ボイド（第２実施例）、２０ｃは前記の上面部と両側面部及び下面部を具備して筒状に形成された補強用メッシュ筋付き有孔メタルプレート製ボイド（第３実施例）、Ｏ−Ｏは折曲線である。
【０００９】
本発明の補強用メッシュ筋付きの有孔メタルプレート製ボイド２０ａ，２０ｂ，２０ｃは、補強用メッシュ筋８付き有孔メタルプレート１０によつて製造される。この補強用メッシュ筋付き有孔メタルプレート１０は、図１に示すようにほぼ全域的に多数の小孔２を形成した有孔薄鉄板５と補強用メッシュ筋８とによつて形成される。その有孔薄鉄板５には、薄鉄板に多数のスリツトを形成して一方向に引っ張り各スリツトを小孔２に広げて形成したエキスパンドメタルプレートや、薄鉄板に多数の小孔を穿設して形成した多孔メタルプレート等が適用され、前記の補強用メッシュ筋８は、比較的に小径の鉄線や鋼線、異形鉄筋等６，７を縦横に交差させて好ましくはその交差部を溶接９して形成される。この補強用メッシュ筋８と有孔薄鉄板５を重ね合わせて相互に溶接９して組み合わせて補強用メッシュ筋８付き有孔メタルプレート１０として構成される。前記の有孔薄鉄板５の小孔２は、強調させて大きく図示しているが、実際にはコンクリート中の骨材により目詰まりを生じてコンクリートミルクの流通が妨げられる程度に小さく形成される。図示外の多様な形状にも形成される。また、補強用メッシュ筋８の交差部の溶接は、有孔薄鉄板５との溶接９によつて兼用可能である。
【０００１０】
前記の補強用メッシュ補強筋付き有孔メタルプレート製ボイド２０ａ（第１実施例）は、図２Ａ，Ｂに示すように前記の補強用メッシュ筋付き有孔メタルプレート１０によつて製造される。即ち、その補強用メッシュ筋付き有孔メタルプレート１０を複数の折曲線Ｏ―Ｏの部分で矢示のように折曲して上面部１０ａとこの両側縁部に連設された両側面部１０ｂ及び両側面部１０ｂの下縁部から外方に折曲して連設された突出下面部１０ｃを形成して下向き溝状に構成されている。
【００１１】
前記の補強用メッシュ補強筋付き有孔メタルプレート製ボイド２０ｂ（第２実施例）は、前記の補強用メッシュ筋付き有孔メタルプレート１０の両側部分の１０ｃを除去して変形した補強用メッシュ筋付きの有孔メタルプレート１０によつて製造される。即ち、前記のように変形した補強用メッシュ筋付き有孔メタルプレート１０を図３Ａに示すように複数の折曲線Ｏ―Ｏで折曲して上面部１０ａとこの上面部１０ａの両側縁部に連設した側面部１０ｂを形成して下向き溝状に構成されている。
【００１２】
前記の補強用メッシュ補強筋付き有孔メタルプレート製ボイド２０ｃ（第３実施例）は、図１に示す補強用メッシュ筋付き有孔メタルプレート１０の一側部分１０ｃを除去して他側部分１０ｃを上面部１０ａと同様な形状に変形した補強用メッシュ筋付き有孔メタルプレート１０によつて製造される。即ち、変形した補強用メッシュ筋付き有孔メタルプレート１０を図３Ｂに示すように複数の折曲線Ｏ―Ｏで折曲して上面部１０ａとこの両側縁部１０ｂ及びその下縁部間に溶接９などして連設した下面部１０ｂを形成して横断矩形状や正方形状の筒状に構成されている。
【００１３】
ポイド端部閉鎖用キャップ１５ａ（第１実施例）は、図４Ａに示すように前記の補強用メッシュ筋付き有孔メタルプレート製ボイド２０ａ，２０ｂの端部形状に対応した形状の閉鎖面部１０ａと、その一面側に付設した嵌合部１０ａ−１０ｂからなり、前記の有孔メタルプレート製ボイド２０ａ又は２０ｂの端部に嵌着して閉鎖するように構成されている。
【００１４】
ポイド端部閉鎖用キャップ１５ｂ（第２実施例）は、図４Ｂに示すように前記の補強用メッシュ筋付き有孔メタルプレート製ボイド２０ｃの端部形状に対応した形状の閉鎖面部１０ａとその一面側に付設した嵌合部１０ａ−１０ｂ−１０ｄとからなる横断矩形状又は横断正方形状に形成され、前記の有孔メタルプレート製ボイド２０ｃの端部に嵌着して閉鎖するように構成されている。前記のポイド端部閉鎖用キャップ１５ａ，１５ｂは、有孔薄板材５と補強用メッシュ筋８からなる前記の補強用メッシュ筋付き有孔メタルプレート１０によつても製造される。
【００１５】
前記の補強用メッシュ筋付き有孔メタルプレート製ボイド２０ａ（第１実施例）を使用して床スラブを構築する場合は、図５Ａに示すように各種の建築物の柱や梁等（図示省略）の間に架設されたデツキプレートやプレキヤストプレート、型枠等（符号省略）の上側に適宜のスペーサ−３１を配置し、スペーサ−上に下端梁主筋３２を縦横に配置して、波状筋３０ｂと好ましくは異形鉄筋製の上弦筋３０ａ及び下弦筋３０ａとからなる複数のラチス筋３０を、下端梁主筋３２上に適宜の間隔で立設して、一次的にコンクリートＣ１を型枠の上側にラチス筋３０の下部まで一転鎖線のように打設して適度に養生した後、図５Ｂ，Ｃに示すように複数の補強用メッシュ筋付き有孔メタルプレート製ボイド２０ａの端部にポイド端部閉鎖用キャップ１５ａを嵌着して閉塞し、このポイド端部閉鎖用キャップ１５ａ付きの補強用メッシュ筋付き有孔メタルプレート製ボイド２０ａを各ラチス筋３０の間において前記の一次打設のコンクリートＣ１上に配置し、各ラチス筋３０の上弦筋３０ａ上に上端梁主筋３３を縦横に配置して、一次打設のコンクリートＣ１上にラチス筋３０の間から上端梁主筋３３上までコンクリートＣ２を二次的に打設して養生して施工する。各補強用メッシュ筋付き有孔メタルプレート製ボイド２０ａの内部に中空部Ｓが形成されて床スラブとして構築される。
【００１６】
また、前記の補強用メッシュ筋付き有孔メタルプレート製ボイド２０ｂ（第２実施例）を使用してスラブを構築する場合は、前記のスラブ施工において、ポイド端部閉鎖用キャップ１５ａ付きの補強用メッシュ筋付き有孔メタルプレート製ボイド２０ｂに配置換えする程度の変更で同様な構造の床スラブに構築される。前記の補強用メッシュ筋付き有孔メタルプレート製ボイド２０ｃ（第３実施例）を使用してスラブを構築する場合は、前記のスラブ施工において、ポイド端部閉鎖用キャップ１５ｂ付きの補強用メッシュ筋付き有孔メタルプレート製ボイド２０ｃに配置換えする程度の変更で同様な構造の床スラブに構築される。この場合はスラブの全域にわたってコンクリートを一段階で打設することが可能となる。
【００１７】
前記のスラブ施工において、補強用メッシュ筋付き有孔メタルプレート製ボイド２０ａ，２０ｂ，２０ｃは、ほぼ全域的に多数の小孔２を形成した有孔薄鉄板５と補強用メッシュ筋８とを溶接９して重合させて組み合わせた補強用メッシュ筋付き有孔メタルプレート１０（図１参照）によつて製造され、効果的に軽量化、強化されて変形し難い構造となり低コストで提供されて、スラブ施工部に容易に搬入して所要の箇所に精度良く配置されて変形し難い。前記の補強用メッシュ筋付き有孔メタルプレート製ボイド内へのコンクリートの流入は、その端部では、ポイド端部閉鎖用キャップ１５ａ又は１５ｂの嵌着、閉鎖によつて防止されるとともにその下向き溝状の下側開口部では、２段階のコンクリート打設によによつて解消される。また、その上面部１０ａや側面部２０ｂ及び下面部２０ｄでは、コンクリート中の骨材によってその各小孔２が目詰まりされてコンクリートミルクの流通が程よく阻止されて防止されて、その内部に中空部Ｓが所要の形状に効果的に形成される。また、その上面部１０ａや側面部２０ｂ、下面部２０ｄが中空部Ｓの周壁のコンクリートに程良く埋設されてコンクリート補強筋として効果的に機能し、スラブ内層部の養生、硬化が促進されてスラブの内外部が均質に施工されスラブ強度が効果的に高められるなど、スラブ構築の作業性、施工性、信頼性が著しく高められる。また、図示のラチス筋３０のようにその上弦筋３０ａ及び下弦筋３０ａを異形鉄筋製にすることにより、下端梁主筋３２、上端梁主筋３３が節減されてその配筋作業が簡便となる。
【００１８】
図示の有孔薄鉄板５の小孔２は、打設されるコンクリート中の骨材によって目詰まりとなり易く、その目詰まりよりコンクリートミルクの流通が程良く妨げれられて、ボイドの内部に中空部が好適に形成される程度に図示例よりも適度に小さく形成され各種の形状にも形成される。図示例のラチス筋のほかに各種の構造のものが適用される。図示のスラブ施工は図示例に限らず多様に変形される。
【００１９】
【発明の効果】
本発明は、前述のような構成からなる補強用メッシュ筋付き有孔メタルプレートを複数の折曲線で折曲して上面部と両側面部及び突出下面部を具備した下向き溝形状に構成され、又はその上面部と両側面部を具備した下向き溝形状に構成され、又はその上面部と両側面部とともに下面部を具備した筒状に構成されたスラブ形成用の補強用メッシュ筋付き有孔メタルプレート製ボイドに特徴を有し、また、前記のボイドの端部形状に対応させて形成した閉鎖面部とその一面側に付設した嵌合部とからなるポイド端部閉鎖用キャップに特徴を有し、ポイド端部閉鎖用キャップは、好ましくは前記のように補強用メッシュ筋付き有孔メタルプレート製ボイドの端部に嵌着して施工される。
【００２０】
補強用メッシュ筋付き有孔メタルプレート製ボイドは、前記のような構成の補強用メッシュ筋付き有孔メタルプレートによつて製造され、効果的に軽量化、強化されて低コストで提供される。スラブ施工部に容易に搬入して所要の箇所に精度良く配置されて変形し難い。ボイド内へのコンクリートの流入は、端部では、ポイド端部閉鎖用キャップの嵌着によつて防止され、下向き溝形状の下側開口部では、２段階のコンクリート打設によつて解消され、上面部や側面部及び下面部では、コンクリートの骨材により各小孔が目詰まりされてコンクリートミルクの流通が阻止されてその内部に中空部が所要の形状に効果的に形成される。また、その上面部１０ａや側面部２０ｂ及び下面部２０ｄが中空部Ｓの周壁のコンクリートに程良く埋設されてコンクリート補強筋として効果的に機能し、スラブ内層部の養生、硬化が促進されてスラブの内外部が均質に施工されてスラブ強度が効果的に高められるなど、スラブ構築の作業性、施工性、信頼性を著しく向上されている。
【図面の簡単な説明】
【図１】本発明の補強用メッシュ筋付き有孔メタルプレートを製造する補強用メッシュ筋付き有孔メタルプレートの一実施例を示す平面図
【図２】補強用メツシユ筋付き有孔薄鉄板製ボイドの第１実施例を示すその端面図（Ａ）及び側面図（Ｂ）
【図３】補強用メツシユ筋付き有孔薄鉄板製ボイドの第２実施例を示す端面図（Ａ）及びその第３実施例を示す端面図（Ｂ）
【図４】ボイド端部閉鎖用キャップの第１実施例を示す斜視図（Ａ）及びその第２実施例を示す斜視図（Ｂ）
【図５】スラブ施工法の第１工程を示す側視図（Ａ）とその第２工程を示す側視図（Ｂ）及び第２工程を示す側視図（Ｃ）である。
【符号の説明】
１ 薄鉄板（有孔薄鉄板）
２ 小孔（有孔薄鉄板）
５ 有孔薄鉄板
８ 補強用メッシュ筋
９ 溶接
１０ 補強用メッシュ筋付き有孔メタルプレート
１０ａ 上面部
１０ｂ 側面部
１０ｃ 突出下面部
１０ｄ 下面部
２０ａ，２０ｂ，２０ｃ 補強用メッシュ筋付き有孔メタルプレート製ボイド[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a perforated metal plate void with reinforcing mesh streaks, which is embedded in a floor slab or the like of various buildings and forms a hollow portion in the slab to increase the slab thickness (constitution). The invention relates to a cap for closing the void end.
[0002]
[Prior art]
Conventional voids, which are buried in floor slabs of various buildings and have hollows formed inside to increase the slab height (composed), are generally made of metal or resin-made cylindrical voids. Recently, a spiral band-shaped metal plate cylindrical void formed by spirally forming a band-shaped metal plate and a styrofoam cylindrical void formed by styrofoam have been developed.
[0003]
[Problems to be solved by the invention]
The spiral band-shaped metal plate cylindrical void is relatively heavy and has problems such as lack of workability and workability, as well as lack of concrete adhesion and concrete reinforcement. Styrofoam cylindrical voids are light in weight, but have problems such as lack of concrete reinforcement, which is important for slab construction.
[0004]
The present invention has been developed in order to solve the above-mentioned problems, and the object thereof is to reduce the weight, improve workability, workability, and at the same time, improve adhesion to concrete and concrete reinforcement. An object of the present invention is to provide a void made of a perforated metal plate with a mesh bar for reinforcement and a cap for closing the end of the void with enhanced slab workability and reliability.
[0005]
[Means for Solving the Problems]
The present invention is to form a perforated metal plate with reinforcing mesh streaks formed by welding a mesh bar for reinforcement to a perforated thin iron plate having the above-mentioned configuration and having a number of small holes formed therein, for reinforcement. The hole metal plate is bent at a plurality of bending curves to form a downward groove having an upper surface and both side surfaces and a projecting lower surface, or a downward groove having the upper surface and both side surfaces. Alternatively, the present invention is characterized in that it is provided with a perforated metal plate void having a reinforcing mesh line for forming a slab and having a cylindrical shape having a lower surface portion together with the above upper surface portion and both side surface portions.
[0006]
Further, a closed surface portion formed in correspondence with the end shape of the perforated metal plate void with the reinforcing mesh streaks and a fitting portion attached to one surface side thereof are provided. It is characterized by a cap for closing a poid end which is used by being fitted to the end face.
[0007]
The above-mentioned perforated metal plate void with reinforcing mesh streaks has a reinforcing mesh streak formed by welding a perforated thin iron plate having a large number of small holes formed substantially over the entire area and a reinforcing mesh streak. Manufactured by a perforated metal plate, it is lightweight and reinforced and provided at a low cost, and is easily carried into the slab construction part, is precisely arranged at a required location, and is not easily deformed. The inflow of concrete into the perforated metal plate void is prevented by fitting a cap for closing the end of the void at the end of the void, and a two-stage concrete casting is performed at the lower opening of the downward groove. In the upper part, side part and lower part, the small holes are clogged by the aggregate in the concrete, the flow of concrete milk is moderately blocked, and the hollow part is effectively formed inside. Is done. In addition, the upper surface, the side surface, and the lower surface are appropriately buried in the concrete surrounding the hollow portion to effectively function as concrete reinforcing bars, and the curing and hardening of the slab inner layer portion is promoted, so that the inside and outside of the slab are promoted. Workability, workability, and reliability of slab construction of slabs have been effectively improved, such as uniform and fast construction.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an embodiment of a perforated metal plate with a reinforcing mesh bar for producing a void made of a perforated metal plate with a reinforcing mesh bar of the present invention, and FIG. 2 shows a perforated thin iron plate with a reinforcing mesh bar for reinforcing the present invention. FIGS. 3A and 3B show a second embodiment and a third embodiment of the void, and FIGS. 4A and 4B show a first embodiment and a second embodiment of a void end closing cap for closing the void end. FIG. 5 shows an embodiment of floor slab construction. In the figure, 5 is a perforated thin iron plate, 8 is a reinforcing mesh bar, 9 is welding between a perforated thin iron plate and a reinforcing mesh bar, 10 is a perforated metal plate with a reinforcing mesh bar, and 20a is the perforated metal plate. (1st Example) A perforated metal plate void having reinforcing mesh lines formed in a downward groove shape having an upper surface portion 10a, both side surface portions 10b, and a projecting lower surface portion 10c formed by the above method. A void made of a perforated metal plate with reinforcing mesh streaks formed in a downward groove shape having an upper surface portion and both side surface portions (second embodiment), 20 c having the above upper surface portion, both side surface portions and a lower surface portion A void (third embodiment) made of a perforated metal plate with a reinforcing mesh bar formed in a cylindrical shape, OO is a bent curve.
[0009]
The perforated metal plate voids 20a, 20b and 20c of the present invention with the reinforcing mesh streaks are manufactured by the perforated metal plate 10 with the reinforcing mesh streaks 8. This perforated metal plate 10 with a reinforcing mesh streak is formed by a perforated thin iron plate 5 in which a large number of small holes 2 are formed substantially over the entire area as shown in FIG. In the perforated thin iron plate 5, an expanded metal plate formed by forming a large number of slits in the thin iron plate and pulling the slit in one direction to expand each slit into the small hole 2, or a large number of small holes formed in the thin iron plate. A porous metal plate or the like formed in this manner is applied, and the reinforcing mesh bar 8 is formed by crossing a relatively small-diameter iron wire, steel wire, deformed reinforcing bar, or the like 6, 7 vertically and horizontally, preferably by welding the intersection. Formed. The reinforcing mesh bar 8 and the perforated thin iron plate 5 are overlapped, welded to each other 9 and combined to form a perforated metal plate 10 with the reinforcing mesh bar 8. Although the small holes 2 of the perforated thin steel plate 5 are shown in a large size with emphasis, actually, the small holes 2 are formed small enough to cause clogging due to aggregates in the concrete and hinder the flow of the concrete milk. . It is also formed in various shapes other than those shown. In addition, welding at the intersection of the reinforcing mesh bars 8 can also be performed by welding 9 with the perforated thin iron plate 5.
[00010]
The void 20a made of a perforated metal plate with a reinforcing mesh reinforcing bar (first embodiment) is manufactured by using the perforated metal plate 10 with a reinforcing mesh bar as shown in FIGS. 2A and 2B. That is, the perforated metal plate 10 with the reinforcing mesh streaks is bent at a plurality of folding curves OO as shown by arrows, and an upper surface portion 10a and both side surface portions 10b connected to the both side edges and A projecting lower surface portion 10c is formed by bending outward from the lower edge portion of both side surface portions 10b and is formed in a downward groove shape.
[0011]
The void 20b made of a perforated metal plate with a reinforcing mesh reinforcing bar (the second embodiment) is a reinforcing mesh bar deformed by removing 10c on both sides of the perforated metal plate 10 with the reinforcing mesh bar. It is manufactured by using a perforated metal plate 10. That is, as shown in FIG. 3A, the perforated metal plate 10 with the reinforcing mesh streaks that has been deformed as described above is bent along a plurality of bending curves OO to form an upper surface portion 10a and two side edges of the upper surface portion 10a. A side surface portion 10b is provided so as to form a downward groove.
[0012]
The above-mentioned void 20c made of a perforated metal plate with a reinforcing mesh reinforcing bar (third embodiment) is obtained by removing one side portion 10c of the perforated metal plate 10 with a reinforcing mesh bar shown in FIG. Is manufactured by using a perforated metal plate 10 having a reinforcing mesh streak formed by deforming the metal plate 10 into a shape similar to that of the upper surface portion 10a. That is, as shown in FIG. 3B, the deformed perforated metal plate 10 with the reinforcing mesh streaks is bent along a plurality of bending curves OO and welded between the upper surface 10a, the side edges 10b and the lower edge thereof. 9 to form a continuous lower surface portion 10b to form a rectangular cross-section or a square tube.
[0013]
As shown in FIG. 4A, the cap 15a for closing the end of the poid has a closing surface 10a having a shape corresponding to the end of the voids 20a and 20b made of a perforated metal plate with a reinforcing mesh. And a fitting portion 10a-10b attached to one side thereof, and is configured to be fitted to an end of the perforated metal plate void 20a or 20b and closed.
[0014]
As shown in FIG. 4B, the cap 15b for closing the end of the poid (second embodiment) has a closing surface 10a having a shape corresponding to the end shape of the void 20c made of a perforated metal plate with the reinforcing mesh streaks and one surface thereof. It is formed in the shape of a transverse rectangle or a transverse square consisting of fitting portions 10a-10b-10d attached to the sides, and is configured to fit and close to the end of the perforated metal plate void 20c. I have. The caps 15a and 15b for closing the poid ends are also manufactured by using the perforated metal plate 10 having the reinforcing mesh streaks formed of the perforated thin plate material 5 and the reinforcing mesh streaks 8.
[0015]
When a floor slab is constructed using the perforated metal plate voids 20a (first embodiment) with the reinforcing mesh streaks, as shown in FIG. 5A, columns and beams of various buildings are omitted (not shown). ), An appropriate spacer 31 is disposed above a deck plate, a pre-cast plate, a formwork, etc. (reference numerals are omitted), and a lower beam main reinforcement 32 is disposed vertically and horizontally on the spacer. A plurality of lattice bars 30 composed of the upper chord 30a and the lower chord 30a, preferably made of deformed reinforcing steel, are erected at appropriate intervals on the lower beam main reinforcement 32, and the concrete C1 is temporarily placed on the upper side of the formwork. 5A and 5B, and then a plurality of reinforcing mesh streaks with perforated metal plate voids 20a as shown in FIGS. 5B and 5C. Head closure cap 5a is fitted and closed, and a void 20a made of a perforated metal plate with a reinforcing mesh bar with a cap 15a for closing the end of the poid is placed between the lattice bars 30 on the primary cast concrete C1. Then, the upper beam main reinforcement 33 is vertically and horizontally arranged on the upper chord 30a of each lattice 30 and the concrete C2 is secondarily provided from the space between the lattice 30 to the upper beam main reinforcement 33 on the concrete C1 of the primary casting. Casting, curing and construction. A hollow portion S is formed inside the void 20a made of a perforated metal plate with a reinforcing mesh streak and is constructed as a floor slab.
[0016]
When the slab is constructed by using the perforated metal plate void 20b (the second embodiment) with the reinforcing mesh streaks, the reinforcement with the cap 15a for closing the end of the poid in the slab construction described above. A floor slab having a similar structure can be constructed by changing the arrangement to the void 20b made of a perforated metal plate with mesh lines. When a slab is constructed using the void 20c made of a perforated metal plate with a reinforcing mesh bar (third embodiment), the reinforcing mesh bar with the cap 15b for closing the end of the poid in the slab application. A floor slab having a similar structure can be constructed by changing the arrangement of the perforated metal plate voids 20c. In this case, it is possible to cast concrete in one step over the entire area of the slab.
[0017]
In the slab construction described above, the perforated metal plate voids 20a, 20b, and 20c with reinforcing mesh reinforcement are used to weld the perforated thin iron plate 5 in which a large number of small holes 2 are formed in almost the entire area to the reinforcing mesh reinforcement 8. 9 is manufactured by using a perforated metal plate 10 with reinforcing mesh streaks (see FIG. 1) which is combined by superimposing, and is effectively reduced in weight, strengthened and hardly deformed, and provided at low cost. It is easily carried into the slab construction section and is placed at a required location with high accuracy and is not easily deformed. The inflow of concrete into the perforated metal plate void with the reinforcing mesh streaks is prevented at its end by the fitting and closing of the cap 15a or 15b for closing the poid end and its downward groove. The lower opening is relieved by two stages of concrete casting. Further, in the upper surface portion 10a, the side surface portion 20b, and the lower surface portion 20d, the small holes 2 are clogged by the aggregate in the concrete, and the flow of the concrete milk is appropriately prevented and prevented. S is effectively formed in a required shape. Further, the upper surface portion 10a, the side surface portion 20b, and the lower surface portion 20d are appropriately buried in the concrete on the peripheral wall of the hollow portion S and function effectively as a concrete reinforcing bar, and the curing and hardening of the slab inner layer portion are promoted. Workability, workability, and reliability of slab construction are remarkably improved, for example, the inside and outside of the slab are uniformly constructed and the slab strength is effectively increased. Further, by forming the upper and lower chord bars 30a and 30a of deformed rebar like the lattice bars 30 shown in the drawing, the lower beam main bar 32 and the upper beam bar 33 are saved, and the work of arranging the bars is simplified.
[0018]
The small holes 2 of the perforated thin iron plate 5 shown in the drawing are easily clogged by the aggregate in the concrete to be cast, and the clogging hinders the flow of the concrete milk, and the hollow portion is formed inside the void. Are formed appropriately smaller than the illustrated example to such an extent that they are preferably formed, and may be formed in various shapes. Various structures other than the lattice muscles in the illustrated example are applied. The illustrated slab construction is not limited to the illustrated example but may be variously modified.
[0019]
【The invention's effect】
The present invention is configured such that a perforated metal plate with a reinforcing mesh streak having the above-described configuration is bent in a plurality of bending curves to form a downward groove having an upper surface, both side surfaces, and a projecting lower surface, or A perforated metal plate void with reinforcing mesh for reinforcing slabs, formed in a downward groove shape having its upper surface and both side surfaces, or formed in a cylindrical shape having a lower surface together with its upper surface and both side surfaces. And a cap for closing a poid end comprising a closing surface formed corresponding to the shape of the end of the void and a fitting portion provided on one side thereof. The part closing cap is preferably fitted and fitted to the end of a perforated metal plate void with reinforcing mesh as described above.
[0020]
The void made of the perforated metal plate with the reinforcing mesh streaks is manufactured by the perforated metal plate with the reinforcing mesh streaks configured as described above, and is effectively reduced in weight and provided at a low cost. It is easily carried into the slab construction section and is placed at a required location with high accuracy and is not easily deformed. At the end, the inflow of concrete into the void is prevented by the fitting of a cap for closing the end of the void, and at the lower opening of the downward groove, it is eliminated by two-stage concrete casting. In the upper surface, the side surface and the lower surface, each small hole is clogged by the aggregate of concrete, and the flow of concrete milk is prevented, and a hollow portion is effectively formed in the inside thereof in a required shape. Further, the upper surface portion 10a, the side surface portion 20b, and the lower surface portion 20d are appropriately buried in the concrete of the peripheral wall of the hollow portion S and function effectively as concrete reinforcing bars, and the curing and hardening of the slab inner layer portion are promoted. Workability, workability, and reliability of slab construction have been significantly improved, such that the inside and outside of the slab are uniformly constructed and the slab strength is effectively increased.
[Brief description of the drawings]
FIG. 1 is a plan view showing one embodiment of a perforated metal plate with a reinforcing mesh bar for producing a perforated metal plate with a reinforcing mesh bar of the present invention. FIG. 2 is made of a perforated thin iron plate with a reinforcing mesh bar for reinforcing. End view (A) and side view (B) showing a first embodiment of a void.
3A and 3B are an end view showing a second embodiment of a perforated thin iron plate void having a reinforcing mesh and a end view showing the third embodiment.
FIG. 4A is a perspective view showing a first embodiment of a cap for closing a void end portion, and FIG. 4B is a perspective view showing a second embodiment thereof.
FIG. 5 is a side view (A) showing a first step of the slab construction method, a side view (B) showing a second step thereof, and a side view (C) showing a second step.
[Explanation of symbols]
1 Thin iron plate (perforated thin iron plate)
2 small holes (perforated thin iron plate)
5 Perforated thin iron plate 8 Reinforcing mesh streaks 9 Welding 10 Perforated metal plate with reinforcing mesh streaks 10a Upper surface portion 10b Side surface portion 10c Projecting lower surface portion 10d Lower surface portions 20a, 20b, 20c Made of perforated metal plate with reinforcing mesh streaks void
