JP2004011107A

JP2004011107A - Connecting method for framework of residual form

Info

Publication number: JP2004011107A
Application number: JP2002161549A
Authority: JP
Inventors: Nobuaki Takamura; 高村　宣明
Original assignee: Takamura Sogyo Corp
Current assignee: Takamura Sogyo Corp
Priority date: 2002-06-03
Filing date: 2002-06-03
Publication date: 2004-01-15
Anticipated expiration: 2022-06-03
Also published as: JP3830863B2

Abstract

<P>PROBLEM TO BE SOLVED: To connect and fix stacked residual forms by use of two clipping plates and one screw bar by paying attention to a clearance hole formed, when stacking the residual forms, by collecting chamfered parts formed at four corners of the residual forms or cutout groove parts formed on the periphery thereof. <P>SOLUTION: Two surface clipping plate and reverse clipping plate 2 having screw holes 1a and 2a in the center, respectively, and the screw bar 3 to be screwed to be the screw holes 1a and 2a are prepared in advance. When stacking the residual forms, the screw bar 3 is inserted to the clearance hole 4c formed by collecting the chamfered parts 4a or cutout groove parts 4b of the residual forms 4, and the surface clipping plate 1 arranged on the surface side of the residual forms 4 and the reverse clipping plate 2 arranged on the reverse side thereof are screwed to the screw bar 3 to clip, connect and fix the adjacent residual forms 4 by the surface clipping plate 1 and the reverse clipping plate 2. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、コンクリート製の擁壁，砂防ダム，橋脚等の構造物を施工する際に、型枠として使用するコンクリート製パネルである残存型枠の枠組における接続方法に関する。
【０００２】
【従来の技術】
近年、コンクリート製の構造物、例えば擁壁，砂防ダム，橋脚等を施工する場合に、その施工の容易さ、仕上の良さ及び環境との調和等から、コンクリート製パネルの残存型枠が使用されている。この残存型枠は、型枠として枠組し、打設した生コンクリートが固化した後にコンクリートの表面に固着しそのまま残存するものであって、型枠から外す必要もなく、コンクリート構造物が施工できるものである。そしてコンクリート構造物の裏側あるいは埋め戻しをする箇所に使用される残存型枠においては、その表面に化粧を施す必要がなく、又裏面から突出する型鋼やワイヤー等もないのが一般的である。このような残存型枠は、打設コンクリートとの食い付きを良くするために、多数の貫通穴あるいは裏面側に穴溝等を形成させたものである。この手の残存型枠を枠組する際には、特開２０００−１０４２６６号のように貫通穴を利用した段積用連結具によって残存型枠を接続する方法が行われている。この方法につき説明すると、つまり、貫通穴を多数有したコンクリート系でプレート状の型枠部材と、貫通穴に対応する穴を四隅に穿設させ更に中央部が凸状に湾曲され且つ少なくともその凸状部分の周面に穴部を複数穿設した板状の押えプレートと、貫通穴に対応するネジ穴が４箇所或いは中央にもネジ穴が設けられた板状の平プレートと、ボルトとから成る段積用連結具を用意しておき、先ず始めに、予め設置した型枠部材の上部の外側に平プレートを配置すると共に型枠部材の内側に押えプレートを配置させ、且つ押えプレートをセパレーターなどの端部で支持すると共に型枠部材の内側からボルトを挿入しネジ穴に螺合させて押えプレートと平プレートの下部で型枠部材を挟持し、その後、型枠部材の上で且つ押えプレートと平プレートの間に新たな型枠部材を載置すると共に該型枠部材の内側からボルトを挿入しネジ穴に螺合させて押えプレートと平プレートの上部で新たな型枠部材を挟持して固定する方法である。
【０００３】
【発明が解決しようとする課題】
しかしながら、従来の残存形枠の接続方法では、押えプレートと平プレートとの四隅に取付けた４本のボルトが必要となり、又、このボルトを締付ける作業もしなければならない。従って、連結具の部品点数が多く連結具がコスト高となると共に、作業性の面でも時間を要し、作業効率の妨げとなる問題点を有していた。
【０００４】
本発明は、残存型枠の段積の際に、残存型枠の四隅に形成した面取り部あるいは周辺に形成した切り欠溝部等が集って生じる隙間穴に着目し、この隙間穴を利用して段積した残存型枠を２枚の挟持板と１本のネジ棒で接続固定でき、接続が簡単で作業性がよく、且つ安価に行える残存型枠の枠組における接続方法を提供することを目的とする。
【０００５】
【課題を解決するための手段】
上記の課題を解決するために本発明は成されたものであり、つまり、予め、中央に各ネジ穴（１ａ），（２ａ）を有する２枚の表用挟持板（１）及び裏用挟持板（２）と、前記ネジ穴（１ａ），（２ａ）に螺合可能なネジ棒（３）とを用意し、コンクリート系で四角なプレート状の残存型枠（４）を段積する際に、該残存型枠（４）の四隅に形成した面取り部（４ａ）あるいは周辺に形成した切り欠溝部（４ｂ）等が集って生じる隙間穴（４ｃ）に前記ネジ棒（３）を挿通し、該ネジ棒（３）に、前記残存型枠（４）の表側に配置した前記表用挟持板（１）の前記ネジ穴（１ａ）と裏側に配置した前記裏用挟持板（２）の前記ネジ穴（２ａ）とを螺合させ、隣接する前記残存型枠（４）同士を前記表用挟持板（１）と前記裏用挟持板（２）とで挟持し接続固定する接続方法である。
【０００６】
更に、予め、中央に各ネジ穴（１ａ），（２ａ）を有する２枚の表用挟持板（１）及び裏用挟持板（２）と、前記ネジ穴（１ａ），（２ａ）に螺合可能なネジ棒（３）とを用意し、少なくとも、四隅に面取り部（４ａ）と周辺に切り欠溝部（４ｂ）を形成したコンクリート系で四角なプレート状の残存型枠（４）を段積する際に、先ず、予め横列に設置した前記残存型枠（４）の上部の表側に前記表用挟持板（１）を、裏側に前記裏用挟持板（２）を配置し、且つ、前記ネジ棒（３）は前記面取り部（４ａ）あるいは前記切り欠溝部（４ｂ）に配置し、そのネジ棒（３）に前記ネジ穴（１ａ），（２ａ）を螺合し、前記表用挟持板（１）と前記裏用挟持板（２）との略下半分で予め横列に設置した前記残存型枠（４）をゆるく仮挟持し、次いで前記残存型枠（４）の上で、且つ前記表用挟持板（１）と前記裏用挟持板（２）との略上半分間に、新たな前記残存型枠（４）を載置させると共に、その前記面取り部（４ａ）あるいは前記切り欠溝部（４ｂ）が前記ネジ棒（３）の位置に来るように載置させた後、前記裏用挟持板（２）を回して強く締付け、前記表用挟持板（１）と前記裏用挟持板（２）の略上半分で新たな前記残存型枠（４）を挟持し接続固定した接続方法である。
【０００７】
前記裏用挟持板（２）が、円形でその中央部を湾曲に盛り上げて湾曲部（２ｂ）に形成され、且つ該湾曲部（２ｂ）の周面に穴部（２ｃ）を複数穿設させたものであり、前記裏用挟持板（２）を前記ネジ棒（３）に螺合した状態で、前記穴部（２ｃ）に棒状の締付具（５）を挿入し、前記裏用挟持板（２）を回して締付けるのが好ましい。
【０００８】
本発明で言う「段積」とは、枠組する際に残存型枠（４）を横及び上に順次並べ積み上げることであり、その際の並べ方としては千鳥積や並列積（イモ積）等が積み易く好ましいが、この積み方は限定されず、隙間穴（４ｃ）が生じる段積ならばよい。
【０００９】
又、本発明で言う「集って生じる隙間穴」とは、残存型枠（４）の四隅に形成した面取り部（４ａ）と周辺に形成した切り欠溝部（４ｂ）により、残存型枠（４）を段積した際に、並列積の場合、上下、左右４枚の残存型枠（４）によって四隅の面取り部（４ａ）あるいは周辺の切り欠溝部（４ｂ）同士が集合し、略角形の空間が生じ、これを隙間穴（４ｃ）と言い、又千鳥積の場合には、左右２枚の残存型枠（４）の面取り部（４ａ）二隅で生じる空間と残存型枠（４）の切り欠溝部（４ｂ）とが集合して成る角形の空間を隙間穴（４ｃ）と言う。従って、本発明の隙間穴（４ｃ）は、段積で生じるものである。
【００１０】
更に、本発明で言う「ゆるく仮挟持」とは、両挟持板（１），（２）の略下半分が残存型枠（４）を挟持した状態で遊びがあり、両挟持板（１），（２）の上半分間に残存型枠（４）が容易に挿入できる状態を言う。
【００１１】
【発明の実施の形態】
以下本発明の残存型枠の枠組における接続方法を図に基づき説明する。先ず、図１は本発明の接続方法の説明図であり、図１（ａ）は残存型枠（４）を４枚並列積（イモ積）に段積した状態を示している。そして枠組に使用する残存型枠（４）は、コンクリート系で四角形のプレート状の少なくとも四隅に面取り部（４ａ）あるいは周辺にＶ字の切り欠溝部（４ｂ）を形成したものであり、これは本発明者が提案した特願平９−６９１１４号，特願平１０−７１４０８号，特願平１０−１４８４６４号，特願平１０−１７８１００号等の残存型枠（４）に、それらの四隅に面取り部（４ａ）あるいは周辺に切り欠溝部（４ｂ）を形成させたものを使用するのが好ましいが、必ずしもこれらのように多数の貫通穴や溝穴等を穿設したものに限定されず、あくまでコンクリート系で四角形のプレートであって、四隅に面取り部（４ａ）あるいは周辺に切り欠溝部（４ｂ）を形成してあればよい。本実施例では面取り部（４ａ）と切り欠溝部（４ｂ）の両方を形成し、且つ多数の貫通穴（４ｄ）を穿設した残存型枠（４）の場合についての接続方法を説明するものである。従って、残存型枠（４）が四隅に面取り部（４ａ）だけを形成したものあるいは周辺にだけ切り欠溝部（４ｂ）を形成したものについての接続方法は、両方を形成したもので説明できるので省略する。又、段積された残存型枠（４）は、その境目に面取り部（４ａ）あるいは切り欠溝部（４ｂ）が集って生じる隙間穴（４ｃ）が形成される。
【００１２】
そして本発明では図３に示すように、段積した残存型枠（４）を挟持して接続するための、中央に各ネジ穴（１ａ），（２ａ）を有する２枚の表用挟持板（１）と裏用挟持板（２）及びネジ穴（１ａ），（２ａ）に螺合可能なネジ棒（３）とを予め用意する。この裏用挟持板（２）は、円形でその中央部を湾曲に盛り上げて湾曲部（２ｂ）を形成し、且つ湾曲部（２ｂ）の周面に穴部（２ｃ）を複数穿設させるのがよい。尚、表用挟持板（１）は形状を円形が好ましいが、四角形状でもよい。又、ネジ穴（１ａ），（２ａ）の形成は両挟持板（１），（２）の中央にバカ穴を穿設し、そこにナットを溶接すればよい。
【００１３】
次いで、これら予め用意された表用挟持板（１）、裏用挟持板（２）及びネジ棒（３）を使用し、図１（ｂ）の如く隙間穴（４ｃ）に挿通したネジ棒（３）に、残存型枠（４）の表側に配置した表用挟持板（１）のネジ穴（１ａ）を螺合させ、更に残存型枠（４）の裏側に配置した裏用挟持板（２）のネジ穴（２ａ）を螺合させ、この裏用挟持板（２）を回して締付けることにより、表用挟持板（１）と裏用挟持板（２）とで残存型枠（４）を挟持し接続固定される［図１（ｃ）参照］。尚、裏用挟持板（２）の締付けは、ネジ穴（２ａ）のナットを回すかあるいは図５のように穴部（２ｃ）に棒状の締付具（５）を挿入して回せばよく、特に穴部（２ｃ）を利用した締付けの場合には回すための専用工具が不要となり、現場における締付けが容易となると共に締付力も強くできる。
【００１４】
従って図２のように４枚の並列積された残存型枠（４）は、その隙間穴（４ｃ）を利用し表用挟持板（１）と裏用挟持板（２）及びネジ棒（３）とによって、確実に挟持し接続されるのである。
【００１５】
次に、他の接続方法、つまり本発明の請求項２の接続方法につき、その実施形態を図４に基づき説明する。予め、中央に各ネジ穴（１ａ），（２ａ）を有する２枚の表用挟持板（１）及び裏用挟持板（２）と、前記ネジ穴（１ａ），（２ａ）に螺合可能なネジ棒（３）とを用意する。尚、表用挟持板（１）、裏用挟持板（２）及びネジ棒（３）は先に図３で説明したものと同様である。そして、少なくとも、四隅に面取り部（４ａ）と周辺に切り欠溝部（４ｂ）を形成したコンクリート系で四角なプレート状の残存型枠（４）を段積する際に［図４（ａ），（ｂ）参照］、先ず、予め横列に設置固定した残存型枠（４）の上部の表側に表用挟持板（１）を、裏側に裏用挟持板（２）を配置し、且つネジ棒（３）は残存型枠（４）上部の少なくとも面取り部（４ａ）あるいは切り欠溝部（４ｂ）に配置し、そのネジ棒（３）に両挟持板（１），（２）のネジ穴（１ａ），（２ａ）を螺合し、表用挟持板（１）と裏用挟持板（２）との略下半分で予め設置した残存型枠（４）を手でゆるく仮挟持する［図４（ｃ）参照］。次いで設置した残存型枠（４）の上で、且つゆるく仮挟持させた表用挟持板（１）と裏用挟持板（２）との間に、新たな残存型枠（４）を載置させると共に、その前記面取り部（４ａ）あるいは切り欠溝部（４ｂ）がネジ棒（３）の位置に来るように載置させた後、裏用挟持板（２）を回して強く締付け表用挟持板（１）と裏用挟持板（２）の略上半分で新たな残存型枠（４）を挟持し接続固定させる方法である［図４（ｄ）参照］。又、裏用挟持板（２）を回して締付けるには先に説明した通り、穴部（２ｃ）に棒状の締付具（５）を挿入して回すと締付けが容易となる。尚、仮挟持の表用挟持板（１）と裏用挟持板（２）との間に新たな残存型枠（４）を載置させる際に、ゆるく仮挟持状態の両挟持板（１），（２）間には遊びがあり残存型枠（４）の厚さよりも多少開くので、その両挟持板（１），（２）間に新たな残存型枠（４）がスムーズに挿入されるのである。
【００１６】
【発明の効果】
本発明は接続方法においては次の効果を有する。
【００１７】
本発明は請求項１及び請求項２の接続方法が残存型枠（４）に突出する型鋼、あるいは貫通穴（４ｄ）がなくても、段積の際に面取り部（４ａ）及び切り欠溝部（４ｂ）等が集って生じる隙間穴（４ｃ）を利用して残存型枠（４）同士が接続固定されるために、隙間穴（４ｃ）があればどのような種類の残存型枠（４）に対しても接続が可能となり、且つ接続金具においても２枚の表用挟持板（１）と裏用挟持板（２）及び１本のネジ棒（３）だけで接続固定ができ、作業性も良く接続作業の時間が短縮されると共に接続金具のコストも安くなる利点を有する。
【００１８】
又、本発明の接続方法において、各ネジ穴（１ａ），（２ａ）を有する表用挟持板（１）と裏用挟持板（２）とはネジ棒（３）に螺合した状態で並行を保って装着されるので、段積し接続固定された残存型枠（４）の全体的な曲りが殆どなく、特に請求項２の発明の場合には両挟持板（１），（２）間に上方から新たな残存型枠（４）が入れ易いと共に、入れた残存型枠（４）が倒れないので手を離しても締付作業ができる。又、裏用挟持板（２）を回して締付挟持ができるため、裏用挟持板（２）に穿設した穴部（２ｃ）を設けたことにより、その穴部（２ｃ）を利用して棒状の締付具（５）により容易に締付けでき便利である。
【００１９】
更に裏用挟持板（２）の湾曲部（２ｂ）を穿設した穴部（２ｃ）は生コンクリートを打設した際に、その穴部（２ｃ）から生コンクリートが入り込んで残存型枠（４）の貫通穴（４ｄ）にも入り残存型枠（４）と生コンクリートの結合性を高めると共に、生コンクリートが裏用挟持板（２）全体を埋設する役目を成し、裏用挟持板（２）の防錆性も高める。
【図面の簡単な説明】
【図１】本発明の接続方法の実施形態を示す説明図である。
【図２】本発明の接続方法の完成した状態を示す説明図である。
【図３】本発明の接続金具を示す斜視図である。
【図４】本発明の他の接続方法の実施形態を示す説明図である。
【図５】本発明の裏用挟持板の締付方法を示す説明図である。
【符号の説明】
１　表用挟持板
１ａ　ネジ穴
２　裏用挟持板
２ａ　ネジ穴
２ｂ　湾曲部
２ｃ　穴部
３　ネジ棒
４　残存型枠
４ａ　面取り部
４ｂ　切り欠溝部
４ｃ　隙間穴
５　締付具[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a connection method in a framework of a residual formwork that is a concrete panel used as a formwork when constructing a structure such as a concrete retaining wall, a sabo dam, a bridge pier, or the like.
[0002]
[Prior art]
In recent years, when constructing concrete structures such as retaining walls, sabo dams, bridge piers, etc., the remaining formwork of concrete panels has been used due to its ease of construction, good finish and harmony with the environment. ing. This remaining formwork is formed as a formwork, and after the poured raw concrete is solidified, it is fixed to the concrete surface and remains as it is. There is no need to remove it from the formwork, and concrete structures can be constructed. It is. In the case of the remaining formwork used on the back side of the concrete structure or the place to be backfilled, there is generally no need to apply makeup to the surface, and there is generally no mold steel, wire or the like protruding from the backside. Such a residual form has a large number of through-holes or holes and grooves formed on the back surface side in order to improve the bite with the cast concrete. When framing the residual formwork of this kind, a method of connecting the residual formwork with a connecting tool for stacking using a through hole as in JP-A-2000-104266 is used. This method will be described. That is, a concrete plate-shaped form member having a large number of through holes, holes corresponding to the through holes are formed at four corners, and the center portion is curved in a convex shape and at least the convex portion is formed. A plate-shaped holding plate having a plurality of holes formed in the peripheral surface of the plate-shaped portion, a plate-shaped flat plate having screw holes corresponding to four through holes or a screw hole also at the center, and bolts First, a flat plate is arranged outside the upper part of the pre-installed form member, and a holding plate is arranged inside the form member, and the holding plate is separated by a separator. At the same time, the bolts are inserted from the inside of the frame member and screwed into the screw holes to clamp the frame member at the lower portion of the holding plate and the flat plate. Plate and flat pre And insert a bolt from the inside of the frame member, screw it into the screw hole, and clamp and fix the new frame member at the top of the holding plate and flat plate How to
[0003]
[Problems to be solved by the invention]
However, the conventional method of connecting the remaining formwork requires four bolts attached to the four corners of the holding plate and the flat plate, and also requires an operation of tightening these bolts. Therefore, the number of components of the connecting tool is large, so that the cost of the connecting tool is increased, and it takes a long time in terms of workability, which has a problem of hindering work efficiency.
[0004]
The present invention focuses on gap holes formed by gathering chamfered portions formed at the four corners of the remaining formwork or cutout grooves formed around the periphery when stacking the remaining formwork, and utilizes these gap holes. To provide a connection method in a framework of a residual formwork which can be connected and fixed with two holding plates and one screw rod, and can be connected easily, with good workability and at low cost. Aim.
[0005]
[Means for Solving the Problems]
The present invention has been made to solve the above-mentioned problem, that is, two front holding plates (1) having screw holes (1a) and (2a) in the center and a back holding plate in advance. When a plate (2) and a screw rod (3) that can be screwed into the screw holes (1a) and (2a) are prepared, a concrete-based square plate-shaped remaining formwork (4) is stacked. Then, the screw rod (3) is inserted into a clearance hole (4c) formed by gathering chamfered portions (4a) formed at four corners of the remaining formwork (4) or cutout grooves (4b) formed at the periphery. The screw rod (3) is attached to the screw hole (1a) of the front holding plate (1) arranged on the front side of the remaining formwork (4) and the back holding plate (2) arranged on the back side. And the screw holes (2a) are screwed together and the adjacent remaining formwork (4) is connected to the front holding plate (1) and the back holding plate (2). A connection method for clamping fixedly connected.
[0006]
Further, two front holding plates (1) and back holding plates (2) each having screw holes (1a) and (2a) at the center in advance, and screwing the screw holes (1a) and (2a). A screw rod (3) that can be fitted is prepared, and at least a concrete square plate-shaped remaining formwork (4) having chamfered portions (4a) at four corners and a cutout groove (4b) formed at the periphery is stepped. When stacking, first, the front holding plate (1) is arranged on the front side of the upper part of the remaining formwork (4) previously set in a row, and the back holding plate (2) is arranged on the back side, and The screw rod (3) is disposed in the chamfered portion (4a) or the notched groove (4b), and the screw holes (1a) and (2a) are screwed into the screw rod (3). The remaining formwork (4) previously installed in a row is loosely temporarily clamped in the lower half of the clamping plate (1) and the back clamping plate (2). The new remaining formwork (4) is placed on the remaining formwork (4) and substantially between the upper halves of the front holding plate (1) and the back holding plate (2). At the same time, after the chamfered portion (4a) or the cutout groove (4b) is placed so as to come to the position of the screw rod (3), the back clamping plate (2) is rotated and strongly tightened. This is a connection method in which a new remaining formwork (4) is sandwiched and connected and fixed by substantially the upper half of the front sandwiching plate (1) and the back sandwiching plate (2).
[0007]
The back holding plate (2) is formed in a curved portion (2b) in a circular shape with its central portion raised in a curved shape, and a plurality of holes (2c) are formed in the peripheral surface of the curved portion (2b). In a state where the back holding plate (2) is screwed into the screw rod (3), a bar-shaped fastener (5) is inserted into the hole (2c), and the back holding plate (2) is inserted. Preferably, the plate (2) is turned and tightened.
[0008]
The term “stacking” as used in the present invention means that the remaining formwork (4) is sequentially arranged side by side and stacked when forming a frame, and in this case, a staggered product or a parallel product (potato product) or the like is used. Although the stacking is preferable because it is easy to stack, the stacking method is not limited, and any stacking in which the gap hole (4c) occurs is sufficient.
[0009]
The "gap holes that are gathered" according to the present invention are defined by the chamfered portions (4a) formed at the four corners of the remaining formwork (4) and the cutout grooves (4b) formed around the remaining formwork (4). When 4) is stacked, in the case of parallel stacking, the chamfered portions (4a) at the four corners or the notched groove portions (4b) at the periphery are gathered by the four left and right, four left and right formwork (4) to form a substantially rectangular shape. This space is referred to as a clearance hole (4c). In the case of the staggered product, the space formed at the two corners of the chamfered portion (4a) of the left and right two remaining formwork (4) and the remaining formwork (4c) are formed. ) Is called a gap hole (4c). Therefore, the gap hole (4c) of the present invention is formed by stacking.
[0010]
Furthermore, the term "loose temporary holding" as used in the present invention means that there is play in a state where substantially the lower half of both holding plates (1) and (2) hold the remaining form (4), and both holding plates (1) and (2) have play. , (2) means that the remaining formwork (4) can be easily inserted between the upper halves.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a connection method in the framework of the remaining formwork of the present invention will be described with reference to the drawings. First, FIG. 1 is an explanatory view of the connection method of the present invention, and FIG. 1 (a) shows a state in which four remaining molds (4) are stacked in parallel (potato product). The remaining formwork (4) used for the framework is a concrete plate having a chamfered portion (4a) formed at least at four corners or a V-shaped notch groove (4b) at the periphery thereof. The remaining formwork (4) proposed by the present inventors, such as Japanese Patent Application Nos. 9-69114, 10-71408, 10-148644, and 10-178100, has four corners thereof. It is preferable to use one having a chamfered portion (4a) or a notched groove (4b) formed in the periphery, but it is not necessarily limited to one having a large number of through holes, slot holes, and the like. It is only necessary that the plate is a concrete-based square plate, and that the chamfered portion (4a) is formed at the four corners or the notched groove (4b) is formed at the periphery. In the present embodiment, a connection method in the case of a residual form (4) in which both a chamfered portion (4a) and a cutout groove (4b) are formed and a large number of through holes (4d) are formed will be described. It is. Therefore, the connection method for the case where the remaining formwork (4) has only the chamfered portions (4a) at the four corners or the case where the notched groove portions (4b) are formed only at the periphery can be explained by using both of them. Omitted. Further, in the remaining formwork (4) stacked, a gap hole (4c) is formed at the boundary between the chamfered portion (4a) and the cutout groove (4b).
[0012]
In the present invention, as shown in FIG. 3, two front holding plates having respective screw holes (1a) and (2a) at the center for holding and connecting the stacked remaining formwork (4). (1), a back clamping plate (2) and a screw rod (3) that can be screwed into the screw holes (1a) and (2a) are prepared in advance. The back holding plate (2) is circular in shape and has a curved central portion to form a curved portion (2b), and a plurality of holes (2c) are formed in the peripheral surface of the curved portion (2b). Is good. The front holding plate (1) preferably has a circular shape, but may have a square shape. The screw holes (1a) and (2a) may be formed by drilling a stupid hole in the center of both holding plates (1) and (2) and welding a nut there.
[0013]
Next, using the prepared front holding plate (1), back holding plate (2), and screw rod (3), a screw rod (FIG. 1B) inserted through a clearance hole (4c) as shown in FIG. 3), screw the screw hole (1a) of the front holding plate (1) arranged on the front side of the remaining formwork (4), and further screw the back holding plate (1) arranged on the back side of the remaining formwork (4). The screw holes (2a) in (2) are screwed together, and the back holding plate (2) is rotated and tightened, so that the front holding plate (1) and the back holding plate (2) are connected to the remaining form (4). ) Is connected and fixed [see FIG. 1 (c)]. In order to tighten the back holding plate (2), the nut of the screw hole (2a) may be turned or a rod-shaped fastening tool (5) may be inserted into the hole (2c) as shown in FIG. In particular, in the case of the tightening using the hole (2c), a special tool for turning is not required, so that the tightening on the site becomes easy and the tightening force can be increased.
[0014]
Therefore, as shown in FIG. 2, the four remaining formwork (4) stacked in parallel uses the clearance holes (4c) to hold the front holding plate (1), the back holding plate (2), and the screw rod (3). ), It is possible to securely pinch and connect.
[0015]
Next, another connection method, that is, an embodiment of a connection method according to claim 2 of the present invention will be described with reference to FIG. The two front holding plates (1) and the back holding plate (2) each having screw holes (1a) and (2a) at the center in advance, and can be screwed into the screw holes (1a) and (2a). Prepare a suitable screw rod (3). The front holding plate (1), the back holding plate (2) and the screw rod (3) are the same as those described above with reference to FIG. At least when stacking the concrete-based square plate-shaped remaining formwork (4) having chamfered portions (4a) at the four corners and cutout grooves (4b) at the periphery [FIG. 4 (a), (B)], first, the front holding plate (1) is arranged on the front side of the upper part of the remaining formwork (4) previously installed and fixed in a horizontal row, the back holding plate (2) is arranged on the back side, and the screw rod is used. (3) is arranged in at least the chamfered portion (4a) or the cutout groove (4b) on the upper part of the remaining formwork (4), and the screw rod (3) has a screw hole (2) in both holding plates (1) and (2). 1a) and (2a) are screwed together, and the residual formwork (4) previously set is loosely temporarily held by hand with the lower half of the front holding plate (1) and the back holding plate (2) loosely by hand [FIG. 4 (c)]. Then, a new remaining formwork (4) is placed on the installed remaining formwork (4) and between the front holding plate (1) and the back holding plate (2) loosely temporarily held. At the same time, after the chamfered portion (4a) or the notched groove (4b) is placed so as to come to the position of the screw rod (3), the back clamping plate (2) is turned to strongly tighten the front clamping. This is a method in which a new remaining form (4) is clamped and connected and fixed by approximately the upper half of the plate (1) and the back clamping plate (2) [see FIG. 4 (d)]. Further, as described above, when the back holding plate (2) is turned and fastened, as described above, the fastening is facilitated by inserting and turning the rod-shaped fastening tool (5) into the hole (2c). When a new remaining formwork (4) is placed between the front holding plate (1) and the back holding plate (2) of the temporary holding, the two holding plates (1) in the temporary holding state are loosely mounted. , (2) has a play and is slightly opened than the thickness of the remaining formwork (4), so that the new remaining formwork (4) is smoothly inserted between the holding plates (1), (2). Because
[0016]
【The invention's effect】
The present invention has the following effects in the connection method.
[0017]
According to the present invention, the connecting method of claim 1 and claim 2 is characterized in that the chamfered portion (4a) and the notched groove portion are formed at the time of stacking even if there is no projecting steel or the through hole (4d) in the remaining formwork (4). (4b) The remaining formwork (4) is connected and fixed using the clearance hole (4c) generated by gathering the (4b) and the like. 4), and the connection fitting can be connected and fixed only with two front holding plates (1), two back holding plates (2) and one screw rod (3). There is an advantage that the workability is good, the time for the connection work is shortened, and the cost of the connection fitting is reduced.
[0018]
In the connection method of the present invention, the front holding plate (1) and the back holding plate (2) each having the screw holes (1a) and (2a) are connected in parallel with each other while being screwed to the screw rod (3). , So that the remaining formwork (4), which is stacked and connected and fixed, hardly bends. Particularly, in the case of the invention of claim 2, both holding plates (1), (2) A new remaining formwork (4) can be easily inserted from above, and the inserted remaining formwork (4) does not fall. In addition, since the back holding plate (2) can be rotated and tightened and held, the hole (2c) formed in the back holding plate (2) is used to utilize the hole (2c). It can be easily tightened by the rod-shaped fastener (5) and is convenient.
[0019]
Furthermore, when the fresh concrete is poured into the hole (2c) in which the curved portion (2b) of the back holding plate (2) is drilled, the ready-mixed concrete enters through the hole (2c) and the remaining form (4). ) Also enters the through hole (4d) to enhance the bonding between the remaining formwork (4) and the ready-mixed concrete, and the ready-mixed concrete serves to bury the entire backing plate (2). 2) Also enhances rust prevention.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an embodiment of a connection method according to the present invention.
FIG. 2 is an explanatory view showing a completed state of the connection method of the present invention.
FIG. 3 is a perspective view showing a connection fitting of the present invention.
FIG. 4 is an explanatory diagram showing an embodiment of another connection method of the present invention.
FIG. 5 is an explanatory view showing a method for tightening the back holding plate of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 front holding plate 1a screw hole 2 back holding plate 2a screw hole 2b curved portion 2c hole 3 screw rod 4 remaining formwork 4a chamfered portion 4b cutout groove 4c gap hole 5 fastener

Claims

It can be screwed in advance into two front holding plates (1) and back holding plates (2) having respective screw holes (1a) and (2a) in the center and the screw holes (1a) and (2a). When a concrete screw-shaped rod (3) is prepared and a concrete-based square plate-shaped remaining formwork (4) is to be stacked, the chamfered portions (4a) formed at the four corners of the remaining formwork (4) or The screw rod (3) is inserted into a clearance hole (4c) formed by collecting notch grooves (4b) and the like formed on the periphery, and the screw rod (3) is inserted into the front side of the remaining formwork (4). The screw hole (1a) of the arranged front holding plate (1) and the screw hole (2a) of the back holding plate (2) arranged on the back side are screwed together, and the adjacent remaining formwork ( 4) The connection in the framework of the remaining formwork, wherein the two are sandwiched and fixed by the front holding plate (1) and the back holding plate (2). Law.

It can be screwed in advance into two front holding plates (1) and back holding plates (2) having respective screw holes (1a) and (2a) in the center and the screw holes (1a) and (2a). A screw-shaped rod (3) is prepared, and at least a concrete square plate-shaped remaining formwork (4) having chamfered portions (4a) at four corners and a cutout groove (4b) formed at the periphery is stacked. At this time, first, the front holding plate (1) is arranged on the front side of the upper part of the remaining formwork (4) previously set in a row, and the back holding plate (2) is arranged on the back side, and the screw is installed. The rod (3) is disposed in the chamfered portion (4a) or the notched groove (4b), and the screw holes (1a) and (2a) are screwed into the screw rod (3). Loosely temporarily hold the remaining formwork (4) previously installed in a row with the lower half of (1) and the back holding plate (2). The new remaining formwork (4) is placed on the existing formwork (4) and substantially between the upper half of the front holding plate (1) and the back holding plate (2). After the chamfered portion (4a) or the cutout groove (4b) is placed so as to come to the position of the screw rod (3), the back holding plate (2) is turned and strongly tightened. A connection method in a framework of a remaining formwork, wherein a new remaining formwork (4) is held and connected and fixed by substantially the upper half of the front holding plate (1) and the back holding plate (2).

The back holding plate (2) is formed in a curved portion (2b) in a circular shape with its central portion raised in a curved shape, and a plurality of holes (2c) are formed in the peripheral surface of the curved portion (2b). In a state where the back holding plate (2) is screwed into the screw rod (3), a bar-shaped fastener (5) is inserted into the hole (2c), and the back holding plate (2) is inserted. 3. The connecting method in a framework of a remaining formwork according to claim 1, wherein the plate (2) is turned and fastened.