JP2014055448A - Method and device for connecting reinforcing bars - Google Patents

Method and device for connecting reinforcing bars Download PDF

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JP2014055448A
JP2014055448A JP2012200816A JP2012200816A JP2014055448A JP 2014055448 A JP2014055448 A JP 2014055448A JP 2012200816 A JP2012200816 A JP 2012200816A JP 2012200816 A JP2012200816 A JP 2012200816A JP 2014055448 A JP2014055448 A JP 2014055448A
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reinforcing bars
gap
reinforcing bar
overlapping
reinforcing
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JP6096446B2 (en
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Yoshihiko Nakamura
善彦 中村
Ryosuke Shionaga
亮介 塩永
Ryuichi Yamaguchi
隆一 山口
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IHI Corp
IHI Infrastructure Systems Co Ltd
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IHI Infrastructure Systems Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To firmly connect target reinforcing bars to each other.SOLUTION: The ends of target reinforcing bars 1a, 1b are overlapped to form an overlap part 2. Both end parts of the over lap part 2 are connected by connection fittings 3. When the reinforcing bars 1a, 1b are connected by the connection fittings 3, a clearance forming insert 9 provided to a reinforcement clamp part 5 of the connection fitting 3 is inserted between the reinforcing bars 1a, 1b to form a clearance 4 between the reinforcing bars 1a, 1b. After the connection by the connection fittings 3, concrete is placed, so that cement paste fills the clearance and adheres to the reinforcing bars 1a, 1b.

Description

本発明は、鉄筋コンクリート造、鉄骨鉄筋コンクリート造、プレキャストコンクリート造等の工事において、鉄筋同士を繋ぐときに用いる鉄筋接続方法及び装置に関するものである。   The present invention relates to a method and an apparatus for connecting reinforcing bars used when connecting reinforcing bars in constructions such as reinforced concrete, steel reinforced concrete, and precast concrete.

鉄筋コンクリート造、鉄骨鉄筋コンクリート造、プレキャストコンクリート造等の工事において、鉄筋同士を繋ぐときに用いられている従来の鉄筋接続方式としては、重ね継手方式、機械式継手方式等がある。   In a construction such as a reinforced concrete structure, a steel reinforced concrete structure, a precast concrete structure, etc., there are a lap joint method, a mechanical joint method, and the like as a conventional reinforcing bar connection method used when connecting reinforcing bars.

重ね継手方式は、接続すべき鉄筋の端部を重ね合わせて重ね部を接続するというものであり、具体的には、鉄筋の端部同士を、鉄筋の種類、コンクリートの設計基準強度、鉄筋端部形状、鉄筋の径等により建築工事標準仕様書等によって規定された重ね合わせ長さになるように重ね合わせた後、該重ね合わせた鉄筋の端部同士を連結し、連結後、鉄筋をコンクリートで固めることにより、鉄筋の端部同士を接続するようにしたものがある（たとえば、特許文献１参照）。上記において、上記鉄筋の端部同士の連結は、なまし鋼線を用いた結束線で結束しているのが一般的である。   In the lap joint method, the ends of the reinforcing bars to be connected are overlapped to connect the overlapping parts. Specifically, the ends of the reinforcing bars are connected to each other by the type of reinforcing bars, the strength of the concrete design standard, the ends of the reinforcing bars. After superimposing them to the overlap length specified by the building construction standard specifications, etc., depending on the shape of the part, the diameter of the reinforcing bars, etc., connect the ends of the superposed reinforcing bars and connect the reinforcing bars to the concrete. In some cases, the ends of the reinforcing bars are connected to each other by hardening them (see, for example, Patent Document 1). In the above, the ends of the reinforcing bars are generally connected by a binding wire using an annealed steel wire.

一方、機械式継手方式は、接続すべき鉄筋の端部同士を機械的に連結して接続するというもので、たとえば、接続すべき２本の鉄筋の端部にそれぞれ雄ねじ部を形成して、該各鉄筋の端部同士を突き合わせて配置し、該両鉄筋端部の雄ねじ部に、スリープ状のねじ筒の内側に形成した雌ねじ部を螺合させることにより、鉄筋の端部同士をねじ筒で連結して接続するようにしたものがある（たとえば、特許文献２参照）。   On the other hand, the mechanical joint method is to mechanically connect the ends of the reinforcing bars to be connected to each other, for example, by forming male screw portions at the ends of the two reinforcing bars to be connected, The ends of the reinforcing bars are arranged to face each other, and the ends of the reinforcing bars are screwed to each other by screwing the female threads formed on the inner side of the sleep-like screw cylinder to the male threads of the ends of both the reinforcing bars. Are connected and connected (for example, see Patent Document 2).

特開２０００−２４９５０１号公報JP 2000-249501 A 特開２０１１−１７６５号公報JP 2011-1765 A

ところが、特許文献１に記載されているように、鉄筋の端部同士を必要な重ね合わせ長さに重ね合わせて、該重ね合わせ部を連結して接続する方法の場合は、重ね合わせる鉄筋の端部同士を連結させるようにするものであり、鉄筋の端部の重ね部が密着する。そのため、重ね部の鉄筋同士の間へのコンクリートの充填性が悪くなり、鉄筋接続部の強度を高めることができないという問題がある。又、上記鉄筋の端部同士を結束線で結束するようにしたものでは、鉄筋同士に引張力を加えて鉄筋の接続部に引き離す力を作用させた場合に、その力に上記結束線は抵抗できず、必要な引張強度を得るためには、重ね合わせの長さを規定以上にする必要がある、という問題がある。   However, as described in Patent Document 1, in the case of a method in which the ends of the reinforcing bars are overlapped with each other in a necessary overlapping length and the overlapping portions are connected and connected, the ends of the reinforcing bars to be overlapped The parts are connected to each other, and the overlapping part of the end portions of the reinforcing bars are in close contact with each other. Therefore, there is a problem that the filling property of the concrete between the reinforcing bars of the overlapped portion is deteriorated and the strength of the reinforcing bar connecting portion cannot be increased. In addition, in the case where the ends of the reinforcing bars are bound together with a binding wire, when the tensile force is applied to the reinforcing bars and the pulling force is applied to the connecting portion of the reinforcing bars, the binding wire is resistant to the force. However, in order to obtain the necessary tensile strength, there is a problem that the length of the overlap needs to be more than a specified value.

一方、特許文献２に記載されたものは、接続すべき鉄筋の端部に形成した雄ねじ部に、ねじ筒の内側に形成した雌ねじ部を螺合させることにより、鉄筋の端部同士を接続するものであるため、鉄筋の端部とねじ筒との間に隙間を設けることはできず、鉄筋の端部とねじ筒との間へのコンクリートの充填性が悪くなり、鉄筋接続部の強度を高めることができない、という問題がある。   On the other hand, what is described in Patent Document 2 connects the ends of the reinforcing bars by screwing the internal thread formed on the inner side of the screw cylinder to the external thread formed on the ends of the reinforcing bars to be connected. Therefore, it is not possible to provide a gap between the end of the reinforcing bar and the screw cylinder, the concrete filling property between the end of the reinforcing bar and the screw cylinder is deteriorated, and the strength of the reinforcing bar connecting part is reduced. There is a problem that it cannot be increased.

そこで、本発明は、接続すべき鉄筋の接続を堅固に行い、接続部の強度を高めることができるようにして、上記従来の問題点を解消できるようにする鉄筋接続方法及び装置を提供しようとするものである。   Therefore, the present invention intends to provide a reinforcing bar connection method and apparatus that can firmly connect the reinforcing bars to be connected, increase the strength of the connecting portion, and eliminate the above-mentioned conventional problems. To do.

本発明は、上記課題を解決するために、請求項１に対応して、接続すべき鉄筋の端部同士を重ね合わせて鉄筋を連結する重ね部を形成し、次いで、該重ね部の鉄筋と鉄筋との間に、該鉄筋の端部同士を非接触とする隙間を保持させて、上記重ね部の両端部分を連結し、しかる後、上記連結した上記重ね部の鉄筋の間にコンクリート又はモルタルを充填させるようにして接続させる鉄筋接続方法とする。   In order to solve the above-mentioned problem, the present invention, corresponding to claim 1, forms an overlapped portion for connecting the reinforcing bars by overlapping the ends of the reinforcing bars to be connected, and then Between the reinforcing bars, the gaps that keep the ends of the reinforcing bars in non-contact with each other are held, and both end portions of the overlapped portion are connected, and then the concrete or mortar between the connected reinforcing bars of the overlapped portion. Reinforcing bar connection method to be connected by filling.

又、請求項２に対応して、接続すべき鉄筋を直列に配置して該両鉄筋の端部に連結部材を重ね合わせて鉄筋を連結する各重ね部を形成し、次いで、該各重ね部の各鉄筋と連結部材との間に、該鉄筋と連結部材を非接触とする隙間を保持させて、上記重ね部の両端部分を連結し、しかる後、上記連結した上記重ね部の各鉄筋と連結部材との間にコンクリート又はモルタルを充填させるようにして接続させる鉄筋接続方法とする。   Corresponding to claim 2, the reinforcing bars to be connected are arranged in series, and the overlapping members for connecting the reinforcing bars are formed by overlapping the connecting members on the ends of the reinforcing bars, and then the overlapping parts. The gap between the reinforcing bars and the connecting member is held between the reinforcing bars and the connecting member so as to keep the reinforcing member and the connecting member in non-contact with each other, and both end portions of the overlapped portion are connected. Reinforcing bar connection method in which concrete or mortar is connected between connecting members.

請求項３に対応して、上記重ね部の両端部分を連結するとき、重ね合わせた２つの部材の間に隙間形成用挿入物を挿入してから、連結金具により締め付けて連結を行うようにする構成とする。   Corresponding to claim 3, when connecting both end portions of the overlapped portion, a gap forming insert is inserted between the two overlapped members, and then the connection is performed by tightening with a connecting fitting. The configuration.

更に、請求項４に対応して、接続すべき鉄筋の端部同士を重ね合わせて形成させる重ね部の両端部分で鉄筋と鉄筋との間に挿入して隙間を形成させるための隙間形成用挿入物と、該隙間形成用挿入物で隙間が保持された上記重ね部の両端部分を連結する連続金具とを備えてなり、上記隙間形成用挿入物で隙間を形成させて連結金具で連結した鉄筋同士の間にコンクリート又はモルタルを充填させて接続させるようにした構成を有する鉄筋接続装置とする。   Further, according to claim 4, a gap forming insertion for forming a gap by inserting between the reinforcing bars between the reinforcing bars at both end portions of the overlapping portion formed by overlapping the ends of the reinforcing bars to be connected. And a continuous metal fitting that connects both end portions of the overlapped portion in which the gap is held by the gap forming insert, and the gap is formed by the gap forming insert and connected by the connecting metal fitting. A reinforcing bar connecting device having a configuration in which concrete or mortar is filled between and connected to each other.

更に又、請求項５に対応して、直列に配置した接続すべき両鉄筋の端部と連結部材とを重ね合わせて形成させる各重ね部の両端部分で鉄筋と連結部材との間に挿入して隙間を形成させるための隙間形成用挿入物と、該隙間形成用挿入物で隙間が保持された上記各重ね部の両端部分を連結する連結金具とを備えてなり、上記隙間形成用挿入物で隙間を形成させて連結金具で連結した鉄筋と連結部材との間にコンクリート又はモルタルを充填させて接続させるようにした構成を有する鉄筋接続装置とする。   Further, in accordance with claim 5, the end portions of both reinforcing bars to be connected arranged in series and the connecting member are inserted between the reinforcing bars and the connecting member at both end portions of each overlapping portion. A gap forming insert for forming a gap, and a connecting metal fitting for connecting both end portions of each of the overlapping portions where the gap is held by the gap forming insert, the gap forming insert. Thus, a reinforcing bar connecting device having a structure in which concrete or mortar is filled and connected between a reinforcing bar and a connecting member which are connected with a connecting metal fitting by forming a gap.

又、請求項６に対応して、隙間形成用挿入物と連結金具とを別体とすることに代えて、連結金具を、重ね部の両端部分の外形に沿う形状とした鉄筋クランプ部と、該鉄筋クランプ部に連続して設けてある締付部とを有するものとして、上記隙間形成用挿入物を、上記鉄筋クランプ部又は締付部に内向きに突出させて備えてなるものとした構成とする。   Corresponding to claim 6, instead of making the gap forming insert and the connecting bracket separate, the connecting bracket has a reinforcing bar clamp portion having a shape along the outer shape of both end portions of the overlapping portion, and A structure in which the insert for gap formation is provided so as to protrude inwardly from the rebar clamp part or the tightening part as having a tightening part provided continuously to the rebar clamp part. And

本発明の鉄筋接続方法及び装置によれば、以下の如き優れた効果を発揮する。
（１）接続すべき鉄筋の端部同士を重ね合わせて重ね部を連結するとき、あるいは、直列に配置した接続すべき各鉄筋の端部と連結部材を重ね合わせて重ね部を連結するときに、重ね部の鉄筋と鉄筋との間、鉄筋と連結部材との間に隙間形成用挿入物を挟み込んで隙間を形成した状態で連結し、連結後も上記隙間が形成されているようにするので、上記重ね部にコンクリート又はモルタルを打設して固めるときに、打設されたコンクリートのセメントペースト又はモルタルのモルタル成分が鉄筋と鉄筋の間、鉄筋と連結部材との間に充填されて、これらに付着すると共に、上記隙間を通して重ね部の鉄筋間へのセメントペースト又はモルタル成分の充填性を向上させることができる。
（２）上記（１）により、上記隙間へのセメントペースト又はモルタル成分の充填が良好に行われて、上記隙間を形成している鉄筋同士等へのセメントペースト又はモルタル成分の付着力が高められ、前記重ね部での鉄筋間の力の伝達が確実に行われることになる。これにより接続すべき鉄筋の接続を堅固に行うことができて、接続部の強度を高めることができる。
（３）接続すべき鉄筋の端部同士の重ね部、あるいは、接続すべき鉄筋の端部と連結部材の重ね部の両端部分を連結金具で連結するので、上記重ね部の長さを、重ね継手を用いているこれまでの重ね部の長さに比して短かくすることができる。 According to the reinforcing bar connecting method and apparatus of the present invention, the following excellent effects are exhibited.
(1) When overlapping the overlapping parts by overlapping the ends of the reinforcing bars to be connected, or connecting the overlapping parts by overlapping the ends of the reinforcing bars to be connected arranged in series Since the gap forming insert is sandwiched between the reinforcing bar and the reinforcing bar in the overlapping portion and the gap forming insert is interposed between the reinforcing bar and the connecting member so that the gap is formed even after the connection. When the concrete or mortar is placed and hardened in the overlapped portion, the cement paste of the placed concrete or the mortar component of the mortar is filled between the reinforcing bars and between the reinforcing bars and the connecting members. It is possible to improve the filling property of the cement paste or the mortar component between the reinforcing bars of the overlapped portion through the gap.
(2) According to the above (1), the cement paste or the mortar component is satisfactorily filled into the gap, and the adhesion of the cement paste or the mortar component to the reinforcing bars forming the gap is enhanced. Thus, the transmission of the force between the reinforcing bars in the overlapped portion is surely performed. As a result, the reinforcing bars to be connected can be firmly connected, and the strength of the connecting portion can be increased.
(3) Since the ends of the reinforcing bars to be connected, or the ends of the reinforcing bars to be connected and the both ends of the overlapping portion of the connecting member are connected by connecting metal fittings, the length of the overlapping portion is overlapped. It can be shortened compared with the length of the conventional overlapping part using the joint.

本発明の鉄筋接続方法及び装置の実施の一形態として、接続すべき鉄筋の端部同士を重ね合わせて形成した重ね部の両端部分を連結金具で連結した状態を示すもので、（ａ）は概略平面図、（ｂ）は概略側面図、（ｃ）は概略底面図である。As one embodiment of the reinforcing bar connecting method and apparatus of the present invention, it shows a state in which both end portions of the overlapping portion formed by overlapping end portions of reinforcing bars to be connected are connected by a connecting bracket, (a) (B) is a schematic side view, (c) is a schematic bottom view. 図１（ｂ）のＡ−Ａ矢視拡大正面図である。It is an AA arrow enlarged front view of FIG.1 (b). 本発明の実施の他の形態として、接続すべき鉄筋の端部に連結部材を重ね合わせて形成した各重ね部の両端部分を連結金具で連結した状態を示すもので、（ａ）は概略平面図、（ｂ）は（ａ）のＢ−Ｂ方向からの切断正面図である。As another embodiment of the present invention, it shows a state where both end portions of each overlapping portion formed by overlapping a connecting member on the end portion of a reinforcing bar to be connected are connected by a connecting metal fitting, and (a) is a schematic plane. The figure and (b) are the cut | disconnected front views from the BB direction of (a). 本発明の実施の更に他の形態として、接合すべき鉄筋の端部に２本の連結部材を重ね合わせて形成した各重ね部の両端部分を連結金具で連結した状態を示すもので、（ａ）は概略平面図、（ｂ）は（ａ）のＣ−Ｃ方向からの切断正面図である。As still another embodiment of the present invention, a state in which both end portions of each overlapping portion formed by overlapping two connecting members on the end portions of reinforcing bars to be joined is connected with a connecting metal fitting (a ) Is a schematic plan view, and (b) is a cut front view from the CC direction of (a). 図１、図３及び図４の各重ね部を連結金具で連結するときに用いる隙間形成挿入物の別の例を示す概略正面図である。It is a schematic front view which shows another example of the gap | interval formation insertion used when each overlap part of FIG.1, FIG3 and FIG.4 is connected with a connection metal fitting. 図１、図３及び図４の各重ね部を連結金具で連結するときに用いる隙間形成用挿入物の更に別の例を示す概略正面図である。FIG. 5 is a schematic front view showing still another example of a gap forming insert used when connecting the overlapping portions of FIGS. 1, 3, and 4 with a connecting metal fitting.

以下、本発明を実施するための形態を図面を参照して説明する。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

図１（ａ）（ｂ）（ｃ）及び図２は本発明の実施の一形態を示すもので、先ず、接続すべき２本の鉄筋１ａ，１ｂは、その端部同士を接続できるように重ね合わせ、該２本の鉄筋１ａ，１ｂの端部に、重ね部２を形成させる。   FIGS. 1 (a), (b), (c) and FIG. 2 show an embodiment of the present invention. First, the two reinforcing bars 1a, 1b to be connected can be connected to each other at their ends. The overlapping portion 2 is formed on the ends of the two reinforcing bars 1a and 1b.

次いで、上記２本の鉄筋１ａ，１ｂの端部同士は、重ね部２の両端部分を、図２に一例を示す特殊な連結金具３で締め付けることによって連結すると共に、上記重ね部２における鉄筋１ａ，１ｂの端部同士の間に該鉄筋１ａと１ｂを非接触状態にする僅かな隙間４が形成確保された状態となるようにする。   Next, the ends of the two reinforcing bars 1a and 1b are connected by fastening both end portions of the overlapping portion 2 with a special connection fitting 3 shown in FIG. 2 as an example, and the reinforcing bars 1a in the overlapping portion 2 are connected. , 1b so that a slight gap 4 is formed between the ends of the reinforcing bars 1a and 1b in a non-contact state.

しかる後、上記連結した鉄筋１ａと１ｂの周囲には、コンクリートを打設し、上記鉄筋１ａと１ｂの端部同士の間の隙間４にセメントペーストを充填させるようにし、コンクリートの付着と剪断抵抗により鉄筋１ａと１ｂ間の力の伝達が行えるようにして、鉄筋１ａと１ｂを接続するようにする。   Thereafter, concrete is placed around the connected reinforcing bars 1a and 1b, and the cement paste is filled in the gap 4 between the ends of the reinforcing bars 1a and 1b. Thus, the force can be transmitted between the reinforcing bars 1a and 1b, and the reinforcing bars 1a and 1b are connected.

詳述すると、接続すべき一方の鉄筋１ａの一端部と他方の鉄筋１ｂの他端部とを、重ね継手で接続する場合、鉄筋１ａと１ｂの端部の重ね合わせ長さ、すなわち、重ね部（継手部）２の長さは、従来の結束線で結束させて接続させる場合に必要とされる鉄筋の端部の重ね合わせ長さよりも短い寸法、たとえば、鉄筋径の２０倍程度、あるいは、その半分（鉄筋径の１０位程度）の寸法となるように形成されるようにする。   More specifically, when one end of one reinforcing bar 1a to be connected and the other end of the other reinforcing bar 1b are connected by a lap joint, the overlapping length of the ends of the reinforcing bars 1a and 1b, that is, the overlapping portion The length of the (joint part) 2 is shorter than the overlap length of the end portions of the reinforcing bars required for binding and connecting with conventional binding wires, for example, about 20 times the diameter of the reinforcing bars, or It should be formed so as to have a half of that (about the 10th position of the reinforcing bar diameter).

更に、上記鉄筋１ａと１ｂの端部同士の重ね部２の両端部分を連結する連結金具３は、上記重ね部２の長さ寸法に合わせて幅寸法（鉄筋１ａ，１ｂの軸心方向の両端側で、かつ、鉄筋１ａ，１ｂの外周方向と直角の方向）を、小さく、たとえば、重ね部２の寸法の約１／５程度のものとして製作するようにする。   Further, the connecting fitting 3 for connecting both end portions of the overlapping portion 2 between the end portions of the reinforcing bars 1a and 1b has a width dimension (both ends in the axial direction of the reinforcing bars 1a and 1b) according to the length dimension of the overlapping portion 2. The side and the direction perpendicular to the outer peripheral direction of the reinforcing bars 1a and 1b) are made small, for example, about 1/5 of the dimension of the overlapping portion 2.

上記連結金具３は、図１（ａ）（ｂ）（ｃ）及び図２に一例を示す如く、上記重ね部２における上記鉄筋１ａ，１ｂの外形（重ね部２の外形）に沿う円弧形成部５ａ，５ｂと中央の平板部５ｃとを有するほぼ楕円形状とした鉄筋クランプ部５と、該鉄筋クランプ部５から両端部を外側へ相対向するように突出させて設けた締付部６とを備えて、該締付部６に設けたボルト挿通孔に通したボルト７にナット８を螺合させて締め付けることにより、該締付部６を介して上記鉄筋クランプ部５を締め付けることができるようにしてある。   As shown in FIG. 1 (a), (b), (c) and FIG. 2, the connecting metal fitting 3 is an arc forming portion along the outer shape of the reinforcing bars 1a, 1b in the overlapping portion 2 (the outer shape of the overlapping portion 2). A reinforcing bar clamp part 5 having an approximately elliptical shape having 5a, 5b and a central flat plate part 5c, and a tightening part 6 provided by projecting both ends from the reinforcing bar clamp part 5 so as to face each other outward. In addition, the rebar clamp portion 5 can be tightened via the tightening portion 6 by screwing the nut 8 into the bolt 7 passed through the bolt insertion hole provided in the tightening portion 6 and tightening. It is.

更に、上記平板部５ｃの内側には、上記重ね部２の鉄筋１ａ，１ｂの端部同士の間に前記セメントペーストが充填され得る大きさの隙間４を形成させるための隙間形成用挿入物９を、内向きに突出させて設けた構成としてある。   Further, a gap forming insert 9 for forming a gap 4 of a size that can be filled with the cement paste between the ends of the reinforcing bars 1a, 1b of the overlapping portion 2 inside the flat plate portion 5c. Are provided so as to protrude inward.

上記隙間形成用挿入物９は、本実施の形態では、鉄筋クランプ部５の一方の円弧形成部５ａの幅方向両端縁部を平板部５ｃ中央部より他方の円弧形成部５ｂの方向に平行に切断して、両側部に２つの細片部９ａを形成し、該両細片部９ａを上記鉄筋１ａ，１ｂの直径の１／２より長い寸法に切断して、平板部５ｃの中央部より内側に屈曲させて突出させてなる構成としてある。すなわち、上記細片部９ａを隙間形成用挿入物９として、上記鉄筋クランプ部５と一体にした構成としてある。したがって、上記隙間形成用挿入物９の幅寸法は、上記細片部９ａの幅寸法であり、狭幅のものとしてある。   In the present embodiment, the gap forming insert 9 is arranged so that both end edges in the width direction of one arc forming portion 5a of the reinforcing bar clamp portion 5 are parallel to the direction of the other arc forming portion 5b from the central portion of the flat plate portion 5c. Cut to form two strips 9a on both sides, and cut both strips 9a to a length longer than ½ of the diameter of the reinforcing bars 1a, 1b from the center of the flat plate 5c. It is configured to be bent inward and protrude. In other words, the strip portion 9 a is configured as a gap forming insert 9 and integrated with the reinforcing bar clamp portion 5. Therefore, the width dimension of the gap forming insert 9 is the width dimension of the strip portion 9a and is narrow.

図中、１０は締付部６に備えた座金、１１は連結金具３の内側にコンクリートを充填するときに用いるコンクリート充填用の孔で、必要に応じて鉄筋クランプ部５の平板部５ｃの中央部に設けるものである。   In the figure, 10 is a washer provided in the tightening portion 6, and 11 is a hole for filling concrete used when filling the inside of the connecting fitting 3 with the center of the flat plate portion 5 c of the reinforcing bar clamp portion 5 as necessary. It is provided in the part.

なお、上記隙間形成用挿入物９の厚み寸法は、前記したように、セメントペーストを充填し得る隙間４を形成できるものであればよいが、本実施の形態では、鉄筋クランプ部５の板厚と同じで、たとえば、２、３ｍｍ程度のものとしてある。   In addition, as above-mentioned, the thickness dimension of the said insert 9 for gap | interval formation should just be able to form the clearance gap 4 which can be filled with a cement paste, but in this Embodiment, the plate | board thickness of the reinforcing bar clamp part 5 is sufficient. For example, it is about 2 or 3 mm.

上記構成としてある連結金具３を用いて、一方の鉄筋１ａの端部と他方の鉄筋１ｂの端部とを連結する場合は、図１（ａ）（ｂ）（ｃ）に示す如く、上記鉄筋１ａの端部と鉄筋１ｂの端部を重ね合わせて重ね部２が形成されると、該重ね部２の両端部分で連結金具３により連結させる。この場合、上記連結金具３は、締付部６からボルト７とナット８を取り外した状態で、上記重ね部２の一端部分と他端部分の鉄筋１ａ，１ｂに連結金具３の鉄筋クランプ部５をそれぞれ嵌合させるようにする。このとき、同時に、隙間形成用挿入物９は、鉄筋１ａ，１ｂの間に挿入させられた状態になる。なお、上記鉄筋１ａ，１ｂへの鉄筋クランプ部５の嵌合の際、連結金具３の鉄筋クランプ部５は図示の如く、広幅となっている円弧形成部５ａが、鉄筋１ａの先端位置と鉄筋１ｂの先端位置にそれぞれ嵌合させられ、狭幅としてある円弧形成部５ｂが鉄筋１ａと１ｂの各先端から離れた位置にそれぞれ嵌合させられるようにすると共に、連結金具３の締付部６が、上記重ね部２から見てコンクリートのかぶり厚さとなる側の反対側（コンクリートの反かぶり厚さ側）に向くようにする。   When connecting the end of one reinforcing bar 1a and the end of the other reinforcing bar 1b using the connecting fitting 3 having the above-described configuration, as shown in FIGS. 1 (a), (b) and (c), the reinforcing bar When the overlapping portion 2 is formed by overlapping the end portion of 1a and the end portion of the reinforcing bar 1b, the two ends of the overlapping portion 2 are connected by the connecting fitting 3. In this case, in the state where the bolt 7 and the nut 8 are removed from the tightening portion 6, the connecting bracket 3 is connected to the reinforcing bars 1 a and 1 b of the overlapping portion 2 and the reinforcing bar clamp portion 5 of the connecting bracket 3. Are fitted together. At the same time, the gap forming insert 9 is inserted between the reinforcing bars 1a and 1b. When fitting the reinforcing bar clamp part 5 to the reinforcing bars 1a and 1b, the reinforcing bar clamp part 5 of the connecting fitting 3 has a wide arc forming part 5a as shown in the figure, the tip position of the reinforcing bar 1a and the reinforcing bar. The arc forming portions 5b, which are respectively fitted to the tip positions of 1b and are narrow, are fitted to the positions separated from the tips of the reinforcing bars 1a and 1b, respectively, and the tightening portion 6 of the connection fitting 3 is provided. However, it is made to face to the opposite side (concrete anti-fogging thickness side) of the concrete covering thickness as viewed from the overlapping portion 2.

次に、上記連結金具３の締付部６に設けてあるボルト挿通孔に挿通させたボルト７にナット８を螺合させて締め付けるようにする。締付部６は、対峙間隔が狭められることにより、鉄筋クランプ部５の円弧形成部５ａと５ｂが内側に引き寄せられて、該鉄筋クランプ部５に係合されている上記一方の鉄筋１ａと他方の鉄筋１ｂに締付力が付与される。このとき、該鉄筋１ａと１ｂの間には、隙間形成用挿入物９が挿入されて挟まれているので、鉄筋１ａ，１ｂが、重ね部２の両端部分で連結されると同時に、鉄筋１ａ，１ｂ間に隙間４が積極的に形成される。これにより、上記一方の鉄筋１ａと他方の鉄筋１ｂの各端部同士は、短い重ね部２の両端部分で連結金具３により容易に、かつ、堅固に連結されることになり、上記鉄筋１ａと１ｂが互いに直径方向に離反するような動きを確実に防止することができると同時に、コンクリートのセメントペーストの鉄筋１ａ，１ｂ間への充填性を上げるための隙間４を確保することができるようになる。   Next, the nut 8 is screwed into the bolt 7 inserted through the bolt insertion hole provided in the tightening portion 6 of the connection fitting 3 and tightened. The tightening portion 6 has the above-described one reinforcing bar 1a engaged with the reinforcing bar clamp part 5 and the other reinforcing bar clamp part 5 as a result of the arc forming portions 5a and 5b of the reinforcing bar clamp part 5 being drawn inward by the narrowing of the facing distance. A tightening force is applied to the reinforcing bar 1b. At this time, since the gap forming insert 9 is inserted and sandwiched between the reinforcing bars 1a and 1b, the reinforcing bars 1a and 1b are connected at both ends of the overlapping portion 2 and at the same time, the reinforcing bar 1a. , 1b, a gap 4 is positively formed. Thereby, each edge part of said one reinforcing bar 1a and the other reinforcing bar 1b will be easily and firmly connected by the connection metal fitting 3 in the both ends of the short overlap part 2, and the said reinforcing bar 1a and It is possible to surely prevent the movement of the lbs separating from each other in the diametrical direction, and at the same time to secure a gap 4 for enhancing the filling property between the reinforcing bars 1a and 1b of the concrete cement paste. Become.

次いで、上記一方の鉄筋１ａと他方の鉄筋１ｂの周囲にコンクリートを打設する。打設されたコンクリートは、鉄筋１ａ，１ｂの重ね部２では、鉄筋１ａと１ｂの間で形成される凹部に充填されて鉄筋１ａと１ｂに付着すると共に、セメントペーストは、鉄筋１ａと１ｂの間に形成された隙間４に沿って流れて該隙間４に充填される。一方、連結金具３の部分では、該連結金具３と鉄筋１ａ，１ｂとの間隔や連結金具３の鉄筋クランプ部５の中央部分に設けたコンクリート充填用孔１１から連結金具３の内側にコンクリートは充填され、該連結金具３の内側における鉄筋１ａと１ｂとの間に形成された隙間４にセメントペーストが入り込んで充填させられる。これにより、重ね部２における鉄筋１ａと１ｂには、コンクリートの付着で剪断抵抗力が得られ、鉄筋１ａ，１ｂ間の力の伝達が確実に行われることになる。   Next, concrete is placed around the one reinforcing bar 1a and the other reinforcing bar 1b. The placed concrete is filled in the concave portion formed between the reinforcing bars 1a and 1b in the overlapping portion 2 of the reinforcing bars 1a and 1b and adheres to the reinforcing bars 1a and 1b, and the cement paste is used for the reinforcing bars 1a and 1b. It flows along the gap 4 formed therebetween and fills the gap 4. On the other hand, in the portion of the connecting fitting 3, the concrete is placed inside the connecting fitting 3 from the gap between the connecting fitting 3 and the reinforcing bars 1 a and 1 b and the concrete filling hole 11 provided in the central portion of the reinforcing bar clamp portion 5 of the connecting fitting 3. The cement paste is filled and filled in the gap 4 formed between the reinforcing bars 1a and 1b inside the connecting fitting 3. As a result, a shear resistance force is obtained by the adhesion of concrete to the reinforcing bars 1a and 1b in the overlapped portion 2, and the force transmission between the reinforcing bars 1a and 1b is reliably performed.

本発明においては、上記のように、隙間形成用挿入物９が一体に取り付けられている連結金具３を用いることにより、鉄筋１ａ，１ｂの締め付け操作時に、鉄筋１ａ，１ｂの間に隙間形成用挿入物９を挿入させることができるので、連結金具で重ね部を連結するときに該重ね部での被連結部材の間に隙間を簡単且つ迅速に作成することができて、施工性を向上させることができ、鉄筋接続の作業性を向上させることができる。更に、本発明においては、前記のように鉄筋１ａと１ｂの各端部同士は、重ね部２の両端部分で連結金具３により堅固に連結されることから、上記重ね部２の長さを従来の結束線により結束する場合に比して短くすることができ、重ね部２に充填するコンクリート又はモルタルの打設量を低減させることができる。   In the present invention, as described above, by using the connecting fitting 3 to which the gap-forming insert 9 is integrally attached, the gap-forming gap is formed between the reinforcing bars 1a and 1b during the tightening operation of the reinforcing bars 1a and 1b. Since the insert 9 can be inserted, a gap can be easily and quickly created between the members to be connected at the overlapping portion when the overlapping portions are connected by the connecting bracket, thereby improving the workability. It is possible to improve the workability of the reinforcing bar connection. Furthermore, in the present invention, as described above, the end portions of the reinforcing bars 1a and 1b are firmly connected by the connecting metal fittings 3 at both end portions of the overlapping portion 2, so that the length of the overlapping portion 2 is conventionally increased. Compared with the case where it binds with this binding wire, it can be shortened, and the placement amount of the concrete or mortar with which the overlapping part 2 is filled can be reduced.

次に、図３（ａ）（ｂ）は、本発明の実施の他の形態を示すもので、接続すべき２本の鉄筋１２ａ，１２ｂを、端面を突き合わせるように直列に配置し、該両鉄筋１２ａ，１２ｂの突き合わせ側となる端部同士を繋ぐため、該端部同士に跨る長さを有する鉄筋部材からなる連結部材１３を、上記鉄筋１２ａと１２ｂの端部に平行に沿わせるように重ね合わせて配置して、重ね部１４ａ，１４ｂを形成させるようにする。次いで、上記各重ね部１４ａと１４ｂの各両端部分を、前記図１（ａ）（ｂ）（ｃ）に示した実施の形態の場合と同様に、連結金具３により連結し、上記一方の鉄筋１２ａの端部と他方の鉄筋１２ｂの端部を連結部材１３を介して連結するようにする。連結金具３の構成は、図１及び図２に示す実施の形態で用いたものと同じであり、鉄筋クランプ部５の中央部分の内側に隙間形成用挿入物９を有しており、締付部６をボルト７とナット８の螺合で締め付けるときに、上記各重ね部１４ａ，１４ｂの各両端部分で上記鉄筋１２ａ及び１２ｂと連結部材１３との間に該鉄筋１２ａ，１２ｂと連結部材１３とを非接触状態にする隙間４が同時に形成されるようにしてある。連結金具３の構成は、上記したように、図１及び図２に示すものと同じであり、同一のものには同一符号が付してある。   Next, FIGS. 3 (a) and 3 (b) show another embodiment of the present invention, in which two reinforcing bars 12a and 12b to be connected are arranged in series so as to abut end faces, In order to connect the ends of the reinforcing bars 12a and 12b on the abutting side, the connecting member 13 made of a reinforcing member having a length straddling the ends is arranged in parallel with the ends of the reinforcing bars 12a and 12b. And overlapping portions 14a and 14b are formed. Next, both end portions of each of the overlapping portions 14a and 14b are connected by the connecting fitting 3 in the same manner as in the embodiment shown in FIGS. 1 (a), (b), and (c), and the one reinforcing bar is connected. The end of 12a and the end of the other reinforcing bar 12b are connected via a connecting member 13. The structure of the connecting fitting 3 is the same as that used in the embodiment shown in FIGS. 1 and 2, and has a gap forming insert 9 inside the central portion of the reinforcing bar clamp portion 5, and is tightened. When the part 6 is fastened by screwing the bolt 7 and the nut 8, the reinforcing bars 12 a and 12 b and the connecting member 13 are interposed between the reinforcing bars 12 a and 12 b and the connecting member 13 at both end portions of the overlapping parts 14 a and 14 b. The gap 4 is set to be in a non-contact state at the same time. As described above, the configuration of the connection fitting 3 is the same as that shown in FIGS. 1 and 2, and the same components are denoted by the same reference numerals.

このようにして、鉄筋１２ａと１２ｂの端部と連結部材１３との重ね部１４ａ，１４ｂの各両端部分が連結金具３で連結されると、該連結された重ね部１４ａ，１４ｂの周囲にコンクリートを打設するようにする。   In this way, when both end portions of the overlapping portions 14a and 14b of the ends of the reinforcing bars 12a and 12b and the connecting member 13 are connected by the connecting fitting 3, the concrete is formed around the connected overlapping portions 14a and 14b. To cast.

本実施の形態においては、重ね部１４ａ，１４ｂの各両端部分を、連結金具３で連結することから、接続すべき鉄筋１２ａと１２ｂを、連結部材１３を介して堅固に接続することができる。これにより、鉄筋１２ａと１２ｂに引張力を作用させた場合に鉄筋１２ａ，１２ｂと連結部材１３を直径方向に離反させるような動きを未然に防止することができ、これに伴い、鉄筋１２ａ，１２ｂと連結部材１３とのそれぞれの重ね部１４ａ，１４ｂの長さを、建築工事標準仕様等に規定された鉄筋の重ね合わせ長さよりも短くすることができる。又、重ね部１４ａにおける鉄筋１２ａと連結部材１３との間、及び重ね部１４ｂにおける鉄筋１２ｂと連結部材１３との間には、各々隙間４が形成されているため、鉄筋１２ａ，１２ｂの接続後に打設されたコンクリートは鉄筋１２ａ，１２ｂと連結部材１３との間に充填されて付着すると共に、セメントペーストは上記隙間４に充填されて該隙間４に付着する。これにより、鉄筋１２ａと１２ｂとの連結を連結部材１３を介して、より強固なものとすることができて、連結された鉄筋１２ａ，１２ｂと連結部材１３との間の力の伝達を確実に行わせることが可能となる。又、図３（ｂ）に示す如き連結金具３を用いることにより、前記実施の形態の場合と同様の施工性を良くすることができる等、前記した実施の形態の場合と同様の作用効果を得ることができる。   In the present embodiment, since both end portions of the overlapping portions 14 a and 14 b are connected by the connecting fitting 3, the reinforcing bars 12 a and 12 b to be connected can be firmly connected via the connecting member 13. Thereby, when a tensile force is applied to the reinforcing bars 12a and 12b, it is possible to prevent the reinforcing bars 12a and 12b and the connecting member 13 from moving in the diametrical direction, and accordingly, the reinforcing bars 12a and 12b. The lengths of the overlapping portions 14a and 14b between the connecting member 13 and the connecting member 13 can be made shorter than the overlapping length of the reinforcing bars defined in the building construction standard specifications. In addition, since gaps 4 are formed between the reinforcing bar 12a and the connecting member 13 in the overlapping portion 14a and between the reinforcing bar 12b and the connecting member 13 in the overlapping portion 14b, respectively, after the reinforcing bars 12a and 12b are connected. The placed concrete is filled and adhered between the reinforcing bars 12 a and 12 b and the connecting member 13, and the cement paste is filled in the gap 4 and adheres to the gap 4. Thereby, the connection between the reinforcing bars 12a and 12b can be made stronger through the connecting member 13, and the transmission of force between the connected reinforcing bars 12a and 12b and the connecting member 13 can be ensured. It is possible to make it happen. In addition, by using the connection fitting 3 as shown in FIG. 3B, the same work effects as in the case of the above-described embodiment, such as improvement in workability similar to the case of the above-described embodiment, can be achieved. Can be obtained.

なお、上記実施の形態において、連結部材１３は、鉄筋と同様の部材を用いるようにすることができ、その場合に、連結部材１３の直径は、接続すべき鉄筋１２ａ，１２ｂの直径と等しいものを用いるようにすることにより、連結金具３は、図１及び図２に示す重ね継手で使用する連結金具３をそのまま使用することができて有利であるが、連結部材１３は、鉄筋１２ａ，１２ｂと同様な部材に限らず、角形断面のものを用いるようにすることもできる。   In the above embodiment, the connecting member 13 can be a member similar to a reinforcing bar. In this case, the diameter of the connecting member 13 is equal to the diameter of the reinforcing bars 12a and 12b to be connected. The connection fitting 3 is advantageous because the connection fitting 3 used in the lap joint shown in FIGS. 1 and 2 can be used as it is, but the connection member 13 is made of reinforcing bars 12a and 12b. It is not limited to the same members as those described above, but those having a square cross section can also be used.

図４（ａ）（ｂ）は、本発明の実施の更に他の形態として、図３（ａ）（ｂ）の実施の形態の変形例を示すもので、図３（ａ）に示す如く、接続すべき鉄筋１２ａと１２ｂの端面を突き合わすように直列に配置して、該両面鉄筋１２ａ，１２ｂの突き合わせ側となる端部同士を、１本の連結部材１３を介して連結金具３で連結させる構成に代えて、上記鉄筋１２ａ，１２ｂの突き合わせ側となる端部を両側から挟むように、鉄筋１２ａ，１２ｂの半分程度の断面積とした連結部材１３ａ，１３ｂを重ね合わせて重ね部１４ａ，１４ｂを形成し、該各重ね部１４ａと１４ｂの各両端部分を、連結金具１５による締め付けにより同時に隙間４を形成して連結するようにしたものである。そのために、上記連結金具１５は、図４（ｂ）に示す如く、鉄筋クランプ部５と締付部６とからなる構成において、鉄筋クランプ部５を、鉄筋１２ａ，１２ｂと、その両側の小径の連結部材１３ａ，１３ｂの外形に沿う円弧形成部５ｄと５ａ，５ｂを中央部とその両端部に有し、かつ、中央部の円弧形成部５ｄと両端部の円弧形成部５ａ，５ｂとの間の２個所に、隙間形成用挿入物９を内向きに突出させて設けてなる構成としたものとしてある。   4 (a) and 4 (b) show a modification of the embodiment of FIGS. 3 (a) and 3 (b) as still another embodiment of the present invention. As shown in FIG. It arrange | positions in series so that the end surfaces of the reinforcing bars 12a and 12b to be connected may be abutted, and the end portions on the abutting side of the double-sided reinforcing bars 12a and 12b are coupled by the coupling fitting 3 through one coupling member 13 Instead of the configuration to be made, the connecting members 13a and 13b having a cross-sectional area about half that of the reinforcing bars 12a and 12b are overlapped so as to sandwich the end portion of the reinforcing bars 12a and 12b from both sides to overlap the overlapping parts 14a and 14a. 14b is formed, and both end portions of the overlapping portions 14a and 14b are simultaneously connected by forming the gap 4 by tightening with the connecting metal fitting 15. For this purpose, as shown in FIG. 4 (b), the connecting bracket 15 is composed of a reinforcing bar clamp part 5 and a tightening part 6, and the reinforcing bar clamp part 5 is made up of reinforcing bars 12a and 12b and small diameters on both sides thereof. The arc forming portions 5d and 5a, 5b along the outer shape of the connecting members 13a, 13b are provided at the center portion and both ends thereof, and between the arc forming portion 5d at the center portion and the arc forming portions 5a, 5b at both ends. The gap forming insert 9 is provided so as to protrude inward at the two locations.

上記図４（ａ）（ｂ）に示す実施の形態における隙間形成用挿入物９は、連結金具１５の中央部分の円弧形成部５ｄの幅方向両端縁部を、両端側の円弧形成部５ａ，５ｂの方向へ平行に切断して４ヶ所に細長い細片部９ａを形成し、該細長い細片部９ａをそれぞれ鉄筋クランプ部５の内側に向けて屈曲させて突出させ、該突出部分を、隙間形成用挿入物９としたものである。   The gap forming insert 9 in the embodiment shown in FIGS. 4 (a) and 4 (b) has both end edges in the width direction of the arc forming portion 5d at the center portion of the coupling metal 15 and the arc forming portions 5a at both ends. Cut in parallel in the direction of 5b to form elongated strips 9a at four locations, the strips 9a are bent toward the inside of the reinforcing bar clamp 5 and protruded, This is a forming insert 9.

図４（ａ）（ｂ）に示す形態とした場合も、前記した実施の各形態の場合と同様の作用効果を得ることができる。   Also when it is set as the form shown to Fig.4 (a) (b), the effect similar to the case of each above-mentioned embodiment can be acquired.

更に、図５及び図６は、いずれも本発明で用いる連結金具３の実施の他の形態を示すものである。   Furthermore, FIG.5 and FIG.6 shows the other form of embodiment of the connection metal fitting 3 used by this invention.

すなわち、前記した各実施の形態で使用する連結金具は、鉄筋１ａと１ｂとの間、鉄筋１２ａ，１２ｂと連結部材１３との間、鉄筋１２ａ，１２ｂと連結部材１３ａ，１３ｂとの間に、隙間４を形成するための突起として、隙間形成用挿入物９を鉄筋クランプ部５に一体的に備えてなる構成のものを示したが、これに限定されるものではない。   That is, the connecting metal fittings used in the above-described embodiments are between the reinforcing bars 1a and 1b, between the reinforcing bars 12a and 12b and the connecting member 13, and between the reinforcing bars 12a and 12b and the connecting members 13a and 13b. As the protrusion for forming the gap 4, a structure in which the insert 9 for forming the gap is integrally provided in the reinforcing bar clamp portion 5 is shown, but the present invention is not limited to this.

図５に示すものは、たとえば、図１及び図２に示す実施の形態において、鉄筋１ａと１ｂの間に挟持させて隙間４を形成させるため、鉄筋クランプ部５に一体に取り付けた、隙間形成用挿入物９に代えて、連結金具３とは別体とした隙間形成用挿入物１６の一端部を、締付部６に保持させるようにし、該締付部６から鉄筋クランプ部５側に他端部（先端部）を回動位置させることにより、鉄筋１ａ，１ｂの接続時に、鉄筋１ａと１ｂの間等に挿入させて介装させておくことができるようにしたものである。   5 shows, for example, in the embodiment shown in FIG. 1 and FIG. 2, a gap formation that is integrally attached to the reinforcing bar clamp portion 5 in order to form the gap 4 by being sandwiched between the reinforcing bars 1 a and 1 b. Instead of the insert 9 for use, one end of a gap forming insert 16 that is separate from the connection fitting 3 is held by the fastening part 6, and the reinforcing part 6 is moved to the rebar clamp part 5 side. By rotating the other end portion (tip portion), the reinforcing bars 1a and 1b can be inserted and inserted between the reinforcing bars 1a and 1b when the reinforcing bars 1a and 1b are connected.

なお、図５に示すものは、鉄筋１ａと１ｂの重ね継手、鉄筋１２ａ，１２ｂと連結部材１３の重ね継手の場合を対象とする場合に適用できるものである。   In addition, what is shown in FIG. 5 is applicable when the case of the lap joint of the reinforcing bars 1a and 1b and the lap joint of the reinforcing bars 12a and 12b and the connecting member 13 is targeted.

又、図６に示すものは、隙間形成用挿入物として、連結金具３とは切り離して全く独立して扱えるようにした、隙間形成用挿入物１７で、円柱状、角柱状、中央部にくびれを有する鼓状、その他細長い形状を有するものとしてある。この隙間形成用挿入物１７は、鉄筋１ａと１ｂの間、あるいは、図３(ａ)（ｂ）の鉄筋１２ａ，１２ｂと連結部材１３の間、更には、図４（ａ）（ｂ）の鉄筋１２ａ，１２ｂと連結部材１３ａ，１３ｂの間に挟み込み、該挿入物１７を挟んだ状態で上記鉄筋１ａと１ｂ等を連結金具３で締め付けて連結させることにより、鉄筋１ａと１ｂの間等に隙間４を形成させるようにしたものである。   6 is a gap forming insert 17 which is separated from the connecting metal fitting 3 and can be handled completely independently as a gap forming insert. It is assumed to have a drum shape having a slender shape and other elongated shapes. This gap forming insert 17 is provided between the reinforcing bars 1a and 1b, or between the reinforcing bars 12a and 12b and the connecting member 13 in FIGS. 3 (a) and 3 (b), and further in FIGS. 4 (a) and 4 (b). By sandwiching between the reinforcing bars 12a, 12b and the connecting members 13a, 13b, and connecting the reinforcing bars 1a, 1b and the like with the connecting fitting 3 with the insert 17 interposed therebetween, the reinforcing bars 1a, 1b are connected between the reinforcing bars 1a, 1b. A gap 4 is formed.

そのために、図５及び図６に示す実施の形態は、図３（ａ）（ｂ）、図４（ａ）（ｂ）に示す各形態のものにも隙間形成用挿入物９，１６に代えて適用することができるものである。   Therefore, the embodiment shown in FIGS. 5 and 6 is replaced with the gap forming inserts 9 and 16 in the respective embodiments shown in FIGS. 3 (a) and 3 (b) and FIGS. 4 (a) and 4 (b). Can be applied.

上記図５や図６に示すように隙間形成用挿入物１６や１７を連結金具３，１５の鉄筋クランプ部５とは別体とした場合には、連結金具３，１５の鉄筋クランプ部５を、両端側の円弧形成部５ａ，５ｂ方向の全長に亘り同一の幅寸法とすることができて、連結金具３，１５の製作を容易に行うことが可能となる。   When the gap forming inserts 16 and 17 are separated from the reinforcing bar clamp portions 5 of the connecting fittings 3 and 15 as shown in FIGS. 5 and 6, the reinforcing bar clamp portions 5 of the connecting fittings 3 and 15 are Further, the same width dimension can be provided over the entire length in the direction of the arc forming portions 5a and 5b on both ends, and the connection fittings 3 and 15 can be easily manufactured.

なお、本発明は上記各実施の形態のみに限定されるものではなく、たとえば、隙間形成用挿入物９，１６，１７は、鉄筋１ａと１ｂとの間、鉄筋１２ａ，１２ｂと連結部材１３との間、鉄筋１２ａ，１２ｂと連結部材１３ａ，１３ｂとの間に挿入させた状態で、連結金具３，１５を締め付けたときに、変形して厚みが減少したり、破砕して隙間形成ができなくなることがない限り、材質はどのようなものでもよく、金属製のものでなくてもよく、たとえば、モルタル製のもの、石製のものでもよい。   In addition, this invention is not limited only to said each embodiment, For example, insert 9 for gap formations 9, 16, and 17 are between reinforcing bars 1a and 1b, reinforcing bars 12a and 12b, connecting member 13, and the like. In the meantime, when the coupling fittings 3 and 15 are tightened in a state of being inserted between the reinforcing bars 12a and 12b and the coupling members 13a and 13b, the thickness can be reduced by deformation or the gap can be formed by crushing. As long as it does not disappear, any material may be used, and it does not have to be made of metal. For example, it may be made of mortar or stone.

又、上記した各実施の形態では、接続した鉄筋１ａ，１ｂ，１２ａ，１２ｂの周囲にコンクリートを打設する場合について説明したが、これに限られるものではなく、たとえば、モルタルを打設するようにしてもよい。   In each of the above-described embodiments, the case where concrete is placed around the connected reinforcing bars 1a, 1b, 12a, and 12b has been described. However, the present invention is not limited to this. For example, mortar is placed. It may be.

その他、本発明の要旨を逸脱しない範囲内で種々変更を加え得ることは勿論である。   In addition, it goes without saying that various modifications can be made without departing from the scope of the present invention.

１ａ，１ｂ 鉄筋
２ 重ね部
３ 連結金具
４ 隙間
５ 鉄筋クランプ部
６ 締付部
９ 隙間形成用挿入物
１２ａ，１２ｂ 鉄筋
１３，１３ａ，１３ｂ 連結部材
１５ 連結金具
１６ 隙間形成用挿入物
１７ 隙間形成用挿入物 DESCRIPTION OF SYMBOLS 1a, 1b Reinforcing bar 2 Stacking part 3 Connecting metal fitting 4 Gap 5 Reinforcing bar clamp part 6 Tightening part 9 Insert for gap formation 12a, 12b Reinforcing bar 13, 13a, 13b Connecting member 15 Connecting metal 16 Insert for gap formation 17 For gap formation Insert

Claims (6)

接続すべき鉄筋の端部同士を重ね合わせて鉄筋を連結する重ね部を形成し、次いで、該重ね部の鉄筋と鉄筋との間に、該鉄筋の端部同士を非接触とする隙間を保持させて、上記重ね部の両端部分を連結し、しかる後、上記連結した上記重ね部の鉄筋の間にコンクリート又はモルタルを充填させるようにして接続させることを特徴とする鉄筋接続方法。   Overlap the ends of the reinforcing bars to be connected to form an overlapping part that connects the reinforcing bars, and then hold a gap between the reinforcing bars of the overlapping part so that the ends of the reinforcing bars are not in contact with each other The reinforcing bar connecting method is characterized in that both end portions of the overlapped portion are connected, and thereafter, the reinforcing bars of the connected overlapped portion are connected so as to be filled with concrete or mortar. 接続すべき鉄筋を直列に配置して該両鉄筋の端部に連結部材を重ね合わせて鉄筋を連結する各重ね部を形成し、次いで、該各重ね部の各鉄筋と連結部材との間に、該鉄筋と連結部材を非接触とする隙間を保持させて、上記重ね部の両端部分を連結し、しかる後、上記連結した上記重ね部の各鉄筋と連結部材との間にコンクリート又はモルタルを充填させるようにして接続させることを特徴とする鉄筋接続方法。   Reinforcing bars to be connected are arranged in series, and connecting members are overlapped on the ends of both reinforcing bars to form each overlapping portion connecting the reinforcing bars, and then between each reinforcing bar and each connecting member of each overlapping portion. The gap between the reinforcing bars and the connecting member is kept in a non-contact state, and both end portions of the overlapped portion are connected, and then concrete or mortar is placed between the reinforcing bars of the connected overlapped portion and the connecting member. Reinforcing bar connecting method characterized by filling and connecting. 重ね部の両端部分を連結するとき、重ね合わせた２つの部材の間に隙間形成用挿入物を挿入してから、連結金具により締め付けて連結を行うようにする請求項１又は２記載の鉄筋接続方法。   The reinforcing bar connection according to claim 1 or 2, wherein when connecting both end portions of the overlapped portion, a gap forming insert is inserted between the two overlapped members, and then the connection is performed by tightening with a connecting bracket. Method. 接続すべき鉄筋の端部同士を重ね合わせて形成させる重ね部の両端部分で鉄筋と鉄筋との間に挿入して隙間を形成させるための隙間形成用挿入物と、該隙間形成用挿入物で隙間が保持された上記重ね部の両端部分を連結する連続金具とを備えてなり、上記隙間形成用挿入物で隙間を形成させて連結金具で連結した鉄筋同士の間にコンクリート又はモルタルを充填させて接続させるようにした構成を有することを特徴とする鉄筋接続装置。   A gap forming insert for forming a gap by inserting between the reinforcing bars and the reinforcing bars at both end portions of the overlapping portion formed by overlapping the ends of the reinforcing bars to be connected, and the gap forming insert A continuous metal fitting that connects both end portions of the overlapped portion where the gap is held, and a gap is formed by the gap forming insert, and concrete or mortar is filled between the reinforcing bars connected by the connecting metal fitting. A reinforcing bar connecting device characterized by having a configuration to be connected. 直列に配置した接続すべき両鉄筋の端部と連結部材とを重ね合わせて形成させる各重ね部の両端部分で鉄筋と連結部材との間に挿入して隙間を形成させるための隙間形成用挿入物と、該隙間形成用挿入物で隙間が保持された上記各重ね部の両端部分を連結する連結金具とを備えてなり、上記隙間形成用挿入物で隙間を形成させて連結金具で連結した鉄筋と連結部材との間にコンクリート又はモルタルを充填させて接続させるようにした構成を有することを特徴とする鉄筋接続装置。   Insertion for forming a gap to form a gap by inserting between the reinforcing bar and the connecting member at both end portions of each overlapping part formed by overlapping the ends of both reinforcing bars to be connected arranged in series with the connecting member And a connecting metal fitting for connecting both end portions of each of the overlapping portions in which the gap is held by the gap forming insert, and a gap is formed by the gap forming insert and connected by the connecting metal fitting. A reinforcing bar connecting apparatus having a configuration in which concrete or mortar is filled and connected between a reinforcing bar and a connecting member. 隙間形成用挿入物と連結金具とを別体とすることに代えて、連結金具を、重ね部の両端部分の外形に沿う形状とした鉄筋クランプ部と、該鉄筋クランプ部に連続して設けてある締付部とを有するものとして、上記隙間形成用挿入物を、上記鉄筋クランプ部又は締付部に内向きに突出させて備えてなるものとした請求項４又は５記載の鉄筋接続装置。   Instead of having the gap forming insert and the connecting bracket as separate bodies, the connecting bracket is provided continuously with the reinforcing bar clamp part and the reinforcing bar clamp part in a shape along the outer shape of both end portions of the overlapped part. 6. The reinforcing bar connecting device according to claim 4 or 5, wherein the insertion member for forming a gap is provided so as to protrude inwardly from the reinforcing bar clamping part or the fastening part as having a certain fastening part.
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