JP5914095B2

JP5914095B2 - Reinforcing bar installation method

Info

Publication number: JP5914095B2
Application number: JP2012075839A
Authority: JP
Inventors: 後藤　孝; 孝後藤
Original assignee: Tokyo Tekko Co Ltd
Current assignee: Tokyo Tekko Co Ltd
Priority date: 2012-03-29
Filing date: 2012-03-29
Publication date: 2016-05-11
Anticipated expiration: 2032-03-29
Also published as: KR20130111457A; KR102079398B1; JP2013204343A

Description

本発明は、鉄筋コンクリート構造物の柱の鉄筋を構成する鉄筋篭を建て込む方法、及び該方法に用いる仮固定装置に関する。 The present invention relates to a method for building a reinforcing bar to constitute a reinforcing bar for a column of a reinforced concrete structure, and a temporary fixing device used for the method.

この種の鉄筋篭は、複数の外周筋及び芯筋、並びに剪断補強筋を有している。各外周筋及び芯筋は、鉛直に延びて、柱の主筋を構成する。複数の外周筋は、柱の周方向に互いに離れて配置される。これら外周筋の内側に芯筋が配置されている。剪断補強筋は、複数の外周筋の周りに巻かれている。この鉄筋篭が、工場などで先組みされて、鉄筋コンクリート構造物の施工現場に搬入される。そして、下側の鉄筋篭から順次上方に継ぎ足されるように建て込まれる。継ぎ足すべき鉄筋篭は、クレーン等で吊り下げた状態で、建て込み済みの鉄筋篭の上方に配置する。そして、これら上下の鉄筋篭の対応する外周筋どうし、及び対応する芯筋どうしを継手等を用いて接合する。 This type of steel bar has a plurality of outer peripheral bars and core bars, and a shear reinforcement bar. Each outer periphery reinforcement and core reinforcement extend vertically, and constitute the main reinforcement of a pillar. The plurality of outer peripheral bars are arranged away from each other in the circumferential direction of the column. The core bars are arranged inside these outer peripheral bars. The shear reinforcing bar is wound around the plurality of outer peripheral bars. This reinforcing bar is pre-assembled at a factory or the like and carried to the construction site of the reinforced concrete structure. And it is built so that it may be added to the upper part sequentially from the lower reinforcement rod. The reinforcing bar to be added is suspended above the built-in reinforcing bar with the crane suspended. Then, the outer peripheral bars corresponding to the upper and lower reinforcing bar rods and the corresponding core bars are joined using a joint or the like.

実開昭５３−９５５１５号公報Japanese Utility Model Publication No. 53-95515

鉄筋篭の建て込みにおいて、上下の鉄筋篭の芯筋どうしを接合するのは、外周筋が邪魔で、作業しにくかった。 It was difficult to join the core bars of the upper and lower reinforcing bar rods because the outer peripheral bars obstructed them.

上記問題点を解決するために、本発明に係る鉄筋建込方法は、鉄筋コンクリート構造物の柱を構築する際に、建て込み済みの第１鉄筋篭の上方に第２鉄筋篭を建て込む鉄筋篭建込方法であって、
前記第１鉄筋篭の周方向に互いに離れて配置された複数の第１外周筋と、前記第２鉄筋篭の周方向に互いに離れて配置された複数の第２外周筋とにおける、互いに対応するものどうし間の距離を、前記第１鉄筋篭の前記第１外周筋より内側の第１芯筋と前記第２鉄筋篭の前記第２外周筋より内側の第２芯筋との間の距離より大きくした状態で、前記第２鉄筋篭を前記第１鉄筋篭の上方に吊り下げ、
次に、前記第１、第２芯筋どうしを芯筋接合手段を介して接合し、
その後、前記対応する第１、第２外周筋どうしを外周筋接合手段を介して接合することを特徴とする。
これによって、第１、第２芯筋どうしを接合する際、第１、第２外周筋どうしの間が空いているから、これら第１、第２外周筋に邪魔されることなく、第１、第２芯筋の接合作業を簡易に行うことができる。 In order to solve the above-described problems, the reinforcing bar erection method according to the present invention is a reinforcing bar rod in which a second reinforcing rod is built above the first reinforcing rod that has been built when a column of a reinforced concrete structure is constructed. A construction method,
The plurality of first outer circumferential bars arranged away from each other in the circumferential direction of the first reinforcing bar rod and the plurality of second outer circumferential bars arranged away from each other in the circumferential direction of the second reinforcing bar rod correspond to each other. The distance between the objects is determined based on the distance between the first core reinforcement inside the first outer periphery of the first reinforcing bar and the second core reinforcement inside the second outer periphery of the second reinforcing bar. In the enlarged state, the second rebar rod is suspended above the first rebar rod,
Next, the first and second core reinforcements are joined together through the core reinforcement joining means,
Thereafter, the corresponding first and second outer peripheral bars are bonded to each other through outer peripheral bar bonding means.
As a result, when the first and second core reinforcing bars are joined together, the first and second outer peripheral bars are vacant, so that the first and second outer peripheral bars are not disturbed by the first, The joining operation of the second core reinforcement can be easily performed.

ここで、第２鉄筋籠は、一般に、クレーン等の吊り揚げ手段を用いて、第１鉄筋籠の上方に吊り下げ状態で配置される。そのため、第１、第２芯筋どうしを接合するまでの間、吊り下げ状態の第２鉄筋籠が揺れやすい。そうすると、第１、第２外周筋どうし間がいくら空いていても、第１、第２芯筋どうしの接合作業がし難くなる。
そこで、前記複数の第１、第２外周筋から選択した一部の互いに対応する第１、第２外周筋どうしを仮固定又は先に接合したうえで、前記第１、第２芯筋どうしの接合を行なうことが好ましい。これによって、第１、第２芯筋どうしを接合する際、第２鉄筋篭が揺れるのを抑制又は防止できる。これによって、第１、第２芯筋どうしの接合作業を一層容易に行うことができる。複数の第１、第２外周筋のうち一部のものだけを選択して仮固定又は先接合することで、これら仮固定又は先接合された第１、第２外周筋が、第１、第２芯筋どうしの接合作業の邪魔になるのを回避できる。 Here, the second rebar bar is generally arranged in a suspended state above the first rebar bar using lifting means such as a crane. Therefore, the suspended second rebar bar is likely to swing until the first and second core bars are joined together. If it does so, it will become difficult to join the 1st and 2nd core reinforcements, no matter how much space between the 1st and 2nd outer periphery reinforcements.
Therefore, after temporarily fixing or joining the first and second peripheral muscles corresponding to each other selected from the plurality of first and second peripheral muscles, the first and second core bars are connected to each other. It is preferable to perform bonding. Thereby, when joining the first and second core reinforcing bars, it is possible to suppress or prevent the second rebar bar from shaking. As a result, the joining operation of the first and second core bars can be performed more easily. By selecting only a part of the plurality of first and second outer peripheral muscles and temporarily fixing or pre-joining the first and second outer peripheral muscles, the first and second outer peripheral muscles are temporarily and first joined. It is possible to avoid interfering with the joining work between the two core bars.

前記選択した第１、第２外周筋どうしを仮固定装置にて仮固定したうえで、前記第１、第２芯筋どうしの接合を行ない、その後、前記仮固定装置を撤去したうえで、前記第１、第２外周筋どうしの接合を行なうことが好ましい。これによって、第１、第２芯筋どうしを接合する際、第２鉄筋篭が揺れるのを抑制又は防止できる。よって、第１、第２芯筋どうしの接合作業を一層容易に行うことができる。 After temporarily fixing the selected first and second outer peripheral bars with a temporary fixing device, the first and second core bars are joined to each other, and then the temporary fixing device is removed, It is preferable to join the first and second outer peripheral bars. Thereby, when joining the first and second core reinforcing bars, it is possible to suppress or prevent the second rebar bar from shaking. Therefore, the joining work of the first and second core bars can be performed more easily.

前記第１、第２外周筋の外周に雄ネジ山が形成されており、前記外周筋接合手段が、内周に雌メジ山を有する筒状の外周筋継手を含むことが好ましい。前記仮固定装置として、内周に雌ネジ山を有する筒状の仮固定継手と、外周に雄ネジ山を有する棒材とを用意し、前記仮固定時には、前記選択した第１、第２外周筋の一方と、前記仮固定継手と、前記棒材と、前記外周筋継手と、前記選択した第１、第２外周筋の他方とを、一列に連なるようにネジ結合し、前記第１、第２芯筋どうしの連結後、前記仮固定継手と前記一方の外周筋とのネジ結合を解除し、かつ前記外周筋継手と前記棒材とのネジ結合を解除することが好ましい。これによって、第１、第２外周筋どうしの仮固定を、ねじ回し操作によって簡単に行なうことができる。また、第１、第２芯筋どうしの接合を、ねじ回し操作によって簡単に行なうことができる。さらには、仮固定の解除をねじ回し操作によって簡単に行なうことができる。そして、仮固定装置を撤去した後、外周筋継手をねじ回し操作することによって、第１、第２外周筋どうしを外周筋継手を介して簡単に接合できる。前記外周筋継手は、第１、第２外周筋を仮固定する際の第２の仮固定継手として用いることができる。前記第２鉄筋篭の吊り下げに先立って、前記外周筋継手を第２外周筋の下端部又は第１外周筋の上端部に取り付けておくことで、仮固定操作を効率的に行なうことができる。 It is preferable that male screw threads are formed on the outer circumferences of the first and second outer circumference muscles, and the outer circumference muscle joining means includes a cylindrical outer muscle joint having a female ridge on the inner circumference. As the temporary fixing device, a cylindrical temporary fixing joint having an internal thread on the inner periphery and a bar member having an external thread on the outer periphery are prepared, and at the time of the temporary fixing, the selected first and second outer periphery One of the bars, the temporarily fixed joint, the bar, the outer peripheral joint, and the other of the selected first and second outer bars are screw-connected so as to be connected in a row, the first, It is preferable that after the second core bars are connected to each other, the screw connection between the temporarily fixed joint and the one outer peripheral bar is released, and the screw connection between the outer bar joint and the bar is released. Thereby, temporary fixing of the first and second outer peripheral bars can be easily performed by a screwing operation. In addition, the first and second core bars can be easily joined by a screwing operation. Furthermore, the temporary fixing can be easily released by a screwing operation. And after removing a temporary fixing apparatus, a 1st, 2nd outer periphery reinforcement can be easily joined via an outer periphery reinforcement joint by operating a periphery reinforcement joint by screwing. The outer peripheral joint can be used as a second temporary fixing joint when the first and second outer peripheral bars are temporarily fixed. Prior to suspending the second rebar rod, the outer joint is attached to the lower end of the second outer reinforcement or the upper end of the first outer reinforcement, so that the temporary fixing operation can be efficiently performed. .

また、本発明に係る仮固定装置は、前記第１外周筋に着脱可能な第１連結部と、前記第２外周筋に着脱可能な第２連結部とを含むことを特徴とする。これによって、第１、第２外周筋どうしを簡単に仮固定でき、第１、第２芯筋の接合後は、前記仮固定を簡単に解除できる。 In addition, the temporary fixing device according to the present invention includes a first connecting portion that can be attached to and detached from the first outer periphery and a second connecting portion that can be attached to and detached from the second outer periphery. Accordingly, the first and second outer peripheral bars can be temporarily fixed to each other, and the temporary fixing can be easily released after the first and second core bars are joined.

前記第１連結部と前記第２連結部とは、前記第１、第２外周筋の軸方向に沿って接近離間可能であることが好ましい。これによって、仮固定の際は、対応する第１、第２外周筋どうし間の距離を正確に定めなくても、これら第１、第２外周筋を確実に仮固定できる。また、仮固定を解除する際は、第１、第２連結部間の距離を縮めることで、仮固定装置を第１、第２外周筋どうし間から簡単に撤去できる。 It is preferable that the first connecting portion and the second connecting portion can be approached and separated along the axial direction of the first and second outer peripheral muscles. As a result, when temporarily fixing, the first and second outer peripheral bars can be securely fixed without having to accurately determine the distance between the corresponding first and second outer peripheral bars. When releasing the temporary fixing, the temporary fixing device can be easily removed from between the first and second outer peripheral bars by reducing the distance between the first and second connecting portions.

前記第１、第２連結部の一方が、内周に雌ネジ山を有する筒状の仮固定継手であり、前記第１、第２連結部の他方が、外周に雄ネジ山を有して前記仮固定継手とネジ結合される棒材であることが好ましい。この場合、前記第１、第２外周筋の外周に雄ネジ山が形成されており、前記外周筋接合手段が、内周に雌メジ山を有する筒状の外周筋継手を含むことが好ましい。これによって、前記仮固定継手を第１、第２外周筋の一方とをネジ結合できる。また、前記棒材を前記外周筋継手にネジ結合でき、さらには前記外周筋継手を第１、第２外周筋の他方とネジ結合することで、外周筋継手を介して棒材と第１、第２外周筋の他方とを連結できる。仮固定継手と棒材のねじ込み量を調節することで、第１、第２連結部を接近離間させることができる。 One of the first and second connecting portions is a cylindrical temporary fixed joint having an internal thread on the inner periphery, and the other of the first and second connecting portions has an external thread on the outer periphery. It is preferable that the bar is screwed to the temporary fixing joint. In this case, it is preferable that male threads are formed on the outer circumferences of the first and second outer circumference muscles, and the outer circumference muscle joining means includes a cylindrical outer muscle joint having a female thread on the inner circumference. As a result, the temporarily fixed joint can be screw-coupled to one of the first and second outer peripheral bars. Further, the bar can be screw-coupled to the outer peripheral joint, and the outer joint is screw-coupled to the other of the first and second outer joints, so that the bar and the first, The other of the second outer circumferential bars can be connected. By adjusting the screwing amount of the temporary fixing joint and the bar, the first and second connecting portions can be moved closer to and away from each other.

本発明によれば、第１、第２鉄筋篭の芯筋どうしを、外周筋に邪魔されることなく接合することができる。これによって、鉄筋篭の建て込み作業を容易化できる。 According to the present invention, the core bars of the first and second reinforcing bar rods can be joined without being obstructed by the outer peripheral bars. Thereby, the construction work of the reinforcing bar can be facilitated.

図１は、本発明の第１実施形態を示し、鉄筋コンクリート構造部の柱の鉄筋篭建込体の正面図である。FIG. 1 shows a first embodiment of the present invention and is a front view of a reinforcing bar erected body of a column of a reinforced concrete structure part. 図２は、図１のＩＩ−ＩＩ線に沿う、上記鉄筋篭建込体の第１鉄筋篭の平面断面図である。FIG. 2 is a plan sectional view of the first reinforcing bar rod of the reinforcing bar rod built-in body along the line II-II in FIG. 1. 図３は、第１実施形態における鉄筋篭建込方法を示し、図３（ａ）は、第２鉄筋篭を吊り揚げた状態（吊り工程）の正面図であり、図３（ｂ）は、第２鉄筋篭を第１鉄筋篭の上方に配置した状態（上方配置工程）の正面図であり、図３（ｃ）は、第１、第２芯筋どうしを接合した状態（芯筋接合工程）の正面図であり、図３（ｄ）は、第１、第２外周筋どうしを接合した状態（外周筋接合工程）の正面図である。FIG. 3 shows a reinforcing bar erection method according to the first embodiment, FIG. 3 (a) is a front view of a state where the second reinforcing bar is lifted (hanging process), and FIG. FIG. 3C is a front view of a state in which the second reinforcing bar rod is disposed above the first reinforcing rod rod (upper arrangement step), and FIG. 3C is a state in which the first and second core bars are bonded to each other (core reinforcing step). ), And FIG. 3D is a front view of the state where the first and second outer peripheral bars are joined to each other (outer bar joining step). 図４は、本発明の第２実施形態に係る仮固定装置の縦断面図である。FIG. 4 is a longitudinal sectional view of the temporary fixing device according to the second embodiment of the present invention. 図５は、第２実施形態における鉄筋篭建込方法を示し、図５（ａ）は、第２鉄筋篭を吊り揚げた状態（吊り工程）の正面図であり、図５（ｂ）は、第２鉄筋篭を第１鉄筋篭の上方に配置した状態（上方配置工程）の正面図であり、図５（ｃ）は、選択した一部の第１、第２外周筋どうしを仮固定した状態（仮固定工程）を示す、図６のＶｃ−Ｖｃ線に沿う正面図である。FIG. 5 shows a reinforcing bar erection method according to the second embodiment, FIG. 5 (a) is a front view of a state in which the second reinforcing bar is lifted (hanging process), and FIG. It is a front view of the state (upper arrangement process) which has arranged the 2nd rebar rod above the 1st rebar rod, and Drawing 5 (c) temporarily fixed some selected 1st and 2nd outer periphery reinforcements It is a front view which follows a Vc-Vc line | wire of FIG. 6 which shows a state (temporary fixing process). 図６は、図５（ｃ）のＶＩ−ＶＩ線に沿う平面断面図である。FIG. 6 is a cross-sectional plan view taken along the line VI-VI in FIG. 図７は、第２実施形態における鉄筋篭建込方法を示し、図７（ａ）は、第１、第２芯筋どうしを接合した状態（芯筋接合工程）の正面図であり、図７（ｂ）は、仮固定装置を撤去する状態（撤去工程）の正面図であり、図７（ｃ）は、第１、第２外周筋どうしを接合した状態（外周筋接合工程）の正面図である。FIG. 7 shows a reinforcing bar erection method according to the second embodiment, and FIG. 7 (a) is a front view of the state where the first and second core reinforcing bars are joined (core reinforcing joint step). (B) is a front view of the state (removal process) which removes a temporary fixing apparatus, FIG.7 (c) is a front view of the state (peripheral reinforcement joining process) which joined the 1st, 2nd outer periphery reinforcement. It is. 図８は、第３実施形態における鉄筋篭建込方法を示し、図８（ａ）は、第２鉄筋篭を吊り揚げた状態（吊り工程）の正面図であり、図８（ｂ）は、第２鉄筋篭を第１鉄筋篭の上方に配置した状態（上方配置工程）の正面図であり、図８（ｃ）は、選択した一部の第１、第２外周筋どうしを仮固定した状態（仮固定工程）を示す正面図である。FIG. 8 shows a reinforcing bar erection method according to the third embodiment, FIG. 8 (a) is a front view of a state where the second reinforcing bar is lifted (hanging process), and FIG. FIG. 8C is a front view of a state in which the second reinforcing bar rod is disposed above the first reinforcing rod rod (upper arrangement step), and FIG. 8C temporarily fixes the selected first and second outer peripheral reinforcing bars. It is a front view which shows a state (temporary fixing process). 図９は、図８（ａ）のＩＸ−ＩＸ線に沿う平面断面図である。FIG. 9 is a plan sectional view taken along line IX-IX in FIG. 図１０は、第３実施形態における鉄筋篭建込方法を示し、図１０（ａ）は、第１、第２芯筋どうしを接合した状態（芯筋接合工程）の正面図であり、図１０（ｂ）は、仮固定装置を撤去する状態（撤去工程）の正面図であり、図１０（ｃ）は、第１、第２外周筋どうしを接合した状態（外周筋接合工程）の正面図である。FIG. 10 shows a reinforcing bar erection method according to the third embodiment, and FIG. 10 (a) is a front view of a state in which the first and second core reinforcements are joined together (core reinforcement joining step). (B) is a front view of the state (removal process) which removes a temporary fixing apparatus, FIG.10 (c) is a front view of the state (peripheral reinforcement joining process) which joined the 1st, 2nd outer periphery reinforcement. It is. 図１１は、第４実施形態における鉄筋篭建込方法を示し、図１１（ａ）は、第２鉄筋篭を吊り揚げた状態（吊り工程）の正面図であり、図１１（ｂ）は、第２鉄筋篭を第１鉄筋篭の上方に配置した状態（上方配置工程）の正面図であり、図１１（ｃ）は、選択した一部の第１、第２外周筋どうしを仮固定した状態（仮固定工程）を示す正面図である。FIG. 11 shows a reinforcing bar erection method according to the fourth embodiment, FIG. 11 (a) is a front view of a state where the second reinforcing bar is lifted (hanging process), and FIG. It is a front view of the state (upper arrangement process) which has arranged the 2nd reinforcement bar above the 1st reinforcement bar, and Drawing 11 (c) temporarily fixed selected some 1st and 2nd outer periphery reinforcements It is a front view which shows a state (temporary fixing process). 図１２は、図１１（ｂ）のＸＩＩ−ＸＩＩ線に沿う平面断面図である。FIG. 12 is a plan sectional view taken along line XII-XII in FIG. 図１３は、第４実施形態における鉄筋篭建込方法を示し、図１３（ａ）は、第１、第２芯筋どうしを接合した状態（芯筋接合工程）の正面図であり、図１３（ｂ）は、仮固定装置を撤去する状態（撤去工程）の正面図であり、図１３（ｃ）は、第１、第２外周筋どうしを接合した状態（外周筋接合工程）の正面図である。FIG. 13 shows a reinforcing bar erection method according to the fourth embodiment, and FIG. 13 (a) is a front view of a state in which the first and second core reinforcements are joined together (core reinforcement joining step). (B) is a front view of the state (removal process) which removes a temporary fixing apparatus, FIG.13 (c) is a front view of the state (peripheral reinforcement joining process) which joined the 1st, 2nd outer periphery reinforcement. It is. 図１４は、第５実施形態における鉄筋篭建込方法を示し、図１４（ａ）は、第２鉄筋篭を吊り揚げた状態（吊り工程）の正面図であり、図１４（ｂ）は、第２鉄筋篭を第１鉄筋篭の上方に配置した状態（上方配置工程）の正面図であり、図１４（ｃ）は、選択した一部の第１、第２外周筋どうしを先に接合した状態（先接合工程）を示す正面図である。FIG. 14 shows a reinforcing bar erection method according to the fifth embodiment, FIG. 14 (a) is a front view of a state where the second reinforcing bar is lifted (hanging process), and FIG. It is a front view of the state (upper arrangement process) which has arranged the 2nd rebar rod above the 1st rebar rod, and Drawing 14 (c) joins a part of selected 1st, 2nd outer periphery reinforcement first. It is a front view which shows the state (pre-joining process) which was made. 図１５は、第５実施形態における鉄筋篭建込方法を示し、図１５（ａ）は、第１、第２芯筋どうしを接合した状態（芯筋接合工程）の正面図であり、図１５（ｂ）は、第１、第２外周筋どうしを接合した状態（外周筋接合工程）の正面図である。FIG. 15 shows a reinforcing bar erection method according to the fifth embodiment, and FIG. 15 (a) is a front view showing a state where the first and second core reinforcing bars are joined to each other (core reinforcing joint joining step). (B) is a front view of the state (peripheral reinforcement joining process) which joined the 1st and 2nd outer circumference reinforcement.

以下、本発明の実施形態を図面にしたがって説明する。
＜第１実施形態＞
図１〜図３は、本発明の第１実施形態を示したものである。図１に示すように、鉄筋コンクリート構造物の柱１の鉄筋は、鉄筋篭建込体２にて構成されている。鉄筋篭建込体２は、鉛直方向（上下）に一列に連なる複数の鉄筋篭を含む。以下、鉄筋篭建込体２における上下に隣接する２つの鉄筋篭のうち、下側の鉄筋篭を「第１鉄筋篭１０」と称し、上側の鉄筋篭を「第２鉄筋篭２０」と称す。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
1 to 3 show a first embodiment of the present invention. As shown in FIG. 1, the reinforcing bar of the column 1 of the reinforced concrete structure is composed of a reinforcing bar erected body 2. The reinforcing bar erected body 2 includes a plurality of reinforcing bar ridges that are arranged in a line in the vertical direction (up and down). Hereinafter, of the two reinforcing bar rods adjacent in the vertical direction in the reinforcing bar rod built-in body 2, the lower reinforcing rod rod is referred to as “first reinforcing rod rod 10”, and the upper reinforcing rod rod is referred to as “second reinforcing rod rod 20”. .

図１及び図２に示すように、第１鉄筋篭１０は、複数（図２では１２本）の第１外周筋１１と、１又は複数（図２では４本）の第１芯筋１２と、複数の第１剪断補強筋１３を有している。第１外周筋１１，１１…は、それぞれ鉛直に延びるとともに、互いに柱１の周方向に離れて配置されている。これら第１外周筋１１の内側に、第１芯筋１２が鉛直に延びるようにして配置されている。これら第１外周筋１１及び第１芯筋１２は、柱１の主筋を構成する。以下、第１外周筋１１及び第１芯筋１２を総称して「主筋１１，１２」と称す。図２に示すように、主筋１１，１２は、全体として平面視で格子点状に配列されている。 As shown in FIGS. 1 and 2, the first reinforcing bar rod 10 includes a plurality of (12 in FIG. 2) first outer peripheral bars 11 and one or a plurality of (four in FIG. 2) first core reinforcing bars 12. And a plurality of first shear reinforcement bars 13. The first outer circumferential bars 11, 11... Extend vertically and are spaced apart from each other in the circumferential direction of the column 1. Inside the first outer periphery 11, the first core 12 is arranged so as to extend vertically. These first outer circumferential bars 11 and first core bars 12 constitute the main bars of the column 1. Hereinafter, the first outer periphery 11 and the first core 12 are collectively referred to as “main muscles 11 and 12”. As shown in FIG. 2, the main muscles 11 and 12 are arranged in lattice points in plan view as a whole.

各主筋１１，１２は、ネジ状（螺旋状）のフシ（突起）１１ａ，１２ａを有する異形鉄筋にて構成されている。すなわち、第１外周筋１１の外周には、雄ネジ山１１ａが形成されている。雄ネジ山１１ａは、第１外周筋１１の周方向に１８０度離れた２つの領域に、一定のピッチで、第１外周筋１１の全長にわたって設けられている。第１外周筋１１の外周における上記２つのネジ形成領域間の部分は、ほぼ平らな平坦部１１ｂになっている。図１の二点鎖線に示すように、一方のネジ形成領域の雄ネジ山１１ａを平坦部１１ｂへ仮想的に延長すると、該仮想の雄ネジ山１１ａｘが他方のネジ形成領域の雄ネジ山１１ａに連続する。同様に、第１芯筋１２の外周の１８０度離れた２つの領域には雄ネジ山１２ａが形成されている。これら２つのネジ形成領域の間が平坦部１２ｂになっている。雄ネジ山１１ａ，１２ａによって、主筋１１，１２のコンクリートに対する付着力を高めることができる。 Each of the main bars 11 and 12 is formed of a deformed reinforcing bar having screw-like (spiral) flies (projections) 11a and 12a. That is, a male thread 11 a is formed on the outer periphery of the first outer periphery 11. The external thread 11a is provided over the entire length of the first outer periphery 11 at a constant pitch in two regions 180 degrees apart in the circumferential direction of the first outer periphery 11. A portion between the two screw forming regions on the outer periphery of the first outer periphery 11 is a substantially flat portion 11b. As shown by the two-dot chain line in FIG. 1, when the male thread 11a in one screw forming region is virtually extended to the flat portion 11b, the virtual male thread 11ax becomes the male thread 11a in the other screw forming region. It is continuous. Similarly, male threads 12a are formed in two regions 180 degrees apart on the outer periphery of the first core reinforcement 12. A flat portion 12b is formed between these two screw forming regions. The male screw threads 11a and 12a can increase the adhesion of the main bars 11 and 12 to the concrete.

第１剪断補強筋１３，１３…は、主筋１１，１２の周りに環状に巻かれるとともに、互いに主筋１１，１２の軸方向（鉛直方向）に離れて配置されている。 The first shear reinforcement bars 13, 13... Are wound around the main bars 11, 12 in an annular shape and are arranged apart from each other in the axial direction (vertical direction) of the main bars 11, 12.

第２鉄筋篭２０は、第１鉄筋篭１０と実質的に同じ構造になっている。詳述すると、第２鉄筋篭２０は、複数（ここでは１２本）の第２外周筋２１と、１又は複数（ここでは４本）の第２芯筋２２と、複数の第２剪断補強筋２３を有している。第２外周筋２１，２１，…は、それぞれ鉛直に延びるとともに、互いに柱１の周方向に離れて配置されている。これら第２外周筋２１の内側に、第２芯筋２２が鉛直に延びるようにして配置されている。これら第２外周筋２１及び第２芯筋２２は、柱１の主筋を構成する。以下、第２外周筋２１及び第２芯筋２２を総称して「主筋２１，２２」と称す。主筋２１，２２は、全体として平面視で格子点状に配列されている。 The second reinforcing bar rod 20 has substantially the same structure as the first reinforcing bar rod 10. Specifically, the second reinforcing bar rod 20 includes a plurality (here, twelve) second outer peripheral bars 21, one or a plurality (four here) second core bars 22, and a plurality of second shear reinforcing bars. 23. The second outer circumferential bars 21, 21,... Extend vertically and are spaced apart from each other in the circumferential direction of the column 1. Inside the second outer peripheral bars 21, the second core bars 22 are arranged so as to extend vertically. These second outer circumferential bars 21 and second core bars 22 constitute the main bars of the pillar 1. Hereinafter, the second outer peripheral bars 21 and the second core bars 22 are collectively referred to as “main bars 21 and 22”. The main bars 21 and 22 are arranged in a lattice point in plan view as a whole.

各主筋２１，２２は、ネジ状（螺旋状）のフシ（突起）２１ａ，２２ａを有する異形鉄筋にて構成されている。すなわち、第２外周筋２１の外周の１８０度離れた２つの領域には雄ネジ山２１ａが形成されている。これら２つのネジ形成領域の間が平坦部２１ｂになっている。第２芯筋２２の外周の１８０度離れた２つの領域には雄ネジ山２２ａが形成されている。これら２つのネジ形成領域の間が平坦部２２ｂになっている。雄ネジ山２１ａ，２２ａによって、主筋２１，２２のコンクリートに対する付着力を高めることができる。 Each of the main bars 21 and 22 is formed of a deformed reinforcing bar having screw-like (spiral) flies (projections) 21a and 22a. That is, male threads 21 a are formed in two regions 180 degrees apart from the outer periphery of the second outer periphery 21. A flat portion 21b is formed between these two screw forming regions. Male screw threads 22 a are formed in two regions 180 degrees apart on the outer periphery of the second core reinforcement 22. A flat portion 22b is formed between these two screw forming regions. The adhesive force of the main bars 21 and 22 to the concrete can be increased by the male screw threads 21a and 22a.

第２剪断補強筋２３，２３，…は、主筋２１，２２の周りに環状に巻かれるとともに、互いに主筋２１，２２の軸方向（鉛直方向）に離れて配置されている。 The second shear reinforcement bars 23, 23,... Are wound around the main bars 21, 22 in an annular shape and are arranged apart from each other in the axial direction (vertical direction) of the main bars 21, 22.

図１に示すように、第１鉄筋篭１０の第１外周筋１１と、第２鉄筋篭２０の第２外周筋２１とは、一対一に対応している。対応する外周筋１１，２１どうしが、外周筋接合手段３０を介して一直線に接合されている。外周筋接合手段３０は、外周筋継手３１と、一対のロックナット３２，３３とを備えている。外周筋継手３１は、筒状になっている。外周筋継手３１の内周には、雌ネジ山３１ａが形成されている。外周筋継手３１の例えば中央部にはグラウト孔３１ｃが形成されている。グラウト孔３１ｃは、外周筋継手３１の外周から内周に貫通している。 As shown in FIG. 1, the 1st outer periphery reinforcement 11 of the 1st reinforcement bar 10 and the 2nd outer periphery reinforcement 21 of the 2nd reinforcement bar 20 correspond one to one. Corresponding outer muscles 11 and 21 are joined in a straight line via the outer circumference joint means 30. The outer periphery reinforcing means 30 includes an outer periphery reinforcing joint 31 and a pair of lock nuts 32 and 33. The outer periphery joint 31 is cylindrical. A female thread 31 a is formed on the inner periphery of the outer peripheral joint 31. A grout hole 31c is formed in the central portion of the outer peripheral joint 31, for example. The grout hole 31 c penetrates from the outer periphery to the inner periphery of the outer periphery joint 31.

外周筋継手３１は、対応する外周筋１１，２１間に跨るように配置されている。外周筋継手３１の下側部分の内部に第１外周筋１１の上端部が差し入れられ、ネジ山３１ａ，１１ａどうしが噛み合わされている。外周筋継手３１の上側部分の内部に第２外周筋２１の下端部が差し入れられ、ネジ山３１ａ，２１ａどうしが噛み合わされている。詳細な図示は省略するが、雌ネジ山３１ａと雄ネジ山１１ａ，２１ａとの間には、軸方向に十分な（例えば数ｍｍ程度の）余裕が設定されている。外周筋継手３１の内周と外周筋１１，２１との間には、グラウト（図示省略）がグラウト孔３１ｃを通して充填されて固化されている。 The outer periphery joint 31 is arrange | positioned so that it may straddle between the corresponding outer periphery muscles 11 and 21. FIG. The upper end portion of the first outer peripheral reinforcement 11 is inserted into the lower portion of the outer peripheral joint 31 and the threads 31a and 11a are engaged with each other. The lower end portion of the second outer peripheral reinforcement 21 is inserted into the upper portion of the outer peripheral reinforcement joint 31, and the threads 31a and 21a are engaged with each other. Although detailed illustration is omitted, a sufficient margin (for example, about several mm) in the axial direction is set between the female thread 31a and the male threads 11a and 21a. A grout (not shown) is filled between the inner periphery of the outer peripheral joint 31 and the outer peripheral bars 11 and 21 through the grout hole 31c and solidified.

第１外周筋１１にはロックナット３２がねじ込まれている。このロックナット３２が、外周筋継手３１の下端部に締め付けられている。第２外周筋２１にはロックナット３３がねじ込まれている。このロックナット３３が、外周筋継手３１の上端部に締め付けられている。上記グラウトの充填固化及びロックナット３２，３３の締め付けによって、対応する外周筋１１，２１どうしが、引っ張り力を確実に伝達可能に連結されている。 A lock nut 32 is screwed into the first outer periphery 11. The lock nut 32 is fastened to the lower end portion of the outer peripheral joint 31. A lock nut 33 is screwed into the second outer periphery 21. The lock nut 33 is fastened to the upper end portion of the outer peripheral joint 31. By filling and solidifying the grout and tightening the lock nuts 32 and 33, the corresponding outer peripheral bars 11 and 21 are connected to each other so that the tensile force can be reliably transmitted.

同様にして、第１鉄筋篭１０の第１芯筋１２と、第２鉄筋篭２０の第２芯筋２２とは、一対一に対応している。対応する芯筋１２，２２どうしが、芯筋接合手段４０を介して一直線に接合されている。芯筋接合手段４０は、芯筋継手４１と、一対のロックナット４２，４３とを備えている。芯筋継手４１は、筒状になっている。芯筋継手４１の内周には、雌ネジ山４１ａが形成されている。芯筋継手４１の例えば中央部にはグラウト孔４１ｃが形成されている。グラウト孔４１ｃは、芯筋継手４１の外周から内周に貫通している。 Similarly, the 1st core reinforcement 12 of the 1st rebar rod 10 and the 2nd core reinforcement 22 of the 2nd reinforcement rod 20 correspond one to one. Corresponding core reinforcements 12 and 22 are joined in a straight line via the core reinforcement joining means 40. The core reinforcing joint means 40 includes a core reinforcing joint 41 and a pair of lock nuts 42 and 43. The core joint 41 is cylindrical. On the inner periphery of the core reinforcement joint 41, a female thread 41a is formed. A grout hole 41c is formed in the central portion of the core joint 41, for example. The grout hole 41 c penetrates from the outer periphery to the inner periphery of the core reinforcement joint 41.

芯筋継手４１は、対応する芯筋１２，２２間に跨るように配置されている。芯筋継手４１の下側部分の内部に第１芯筋１２の上端部が差し入れられ、ネジ山４１ａ，１２ａどうしが噛み合わされている。芯筋継手４１の上側部分の内部に第２芯筋２２の下端部が差し入れられ、ネジ山４１ａ，２２ａどうしが噛み合わされている。詳細な図示は省略するが、雌ネジ山４１ａと雄ネジ山１２ａ，２２ａとの間には、軸方向に十分な（例えば数ｍｍ程度の）余裕が設定されている。芯筋継手４１の内周と芯筋１２，２２との間には、グラウト（図示省略）がグラウト孔４１ｃを通して充填されて固化されている。 The core reinforcing joint 41 is disposed so as to straddle between the corresponding core reinforcing bars 12 and 22. The upper end portion of the first core reinforcement 12 is inserted into the lower part of the core reinforcement joint 41, and the threads 41a and 12a are engaged with each other. The lower end portion of the second core reinforcement 22 is inserted into the upper portion of the core reinforcement joint 41, and the threads 41a and 22a are engaged with each other. Although detailed illustration is omitted, a sufficient margin (for example, about several mm) in the axial direction is set between the female screw thread 41a and the male screw threads 12a and 22a. A grout (not shown) is filled between the inner periphery of the core reinforcing joint 41 and the core reinforcing bars 12 and 22 through the grout hole 41c and solidified.

第１芯筋１２にはロックナット４２がねじ込まれている。このロックナット４２が、芯筋継手４１の下端部に締め付けられている。第２芯筋２２にはロックナット４３がねじ込まれている。このロックナット４３が、芯筋継手４１の上端部に締め付けられている。上記グラウトの充填固化及びロックナット４２，４３の締め付けによって、対応する芯筋１２，２２どうしが、引っ張り力を確実に伝達可能に連結されている。
ひいては、鉄筋篭建込体２の主筋１１，１２，２１，２２が、柱１の引っ張り強度を確実に担うことができる。 A lock nut 42 is screwed into the first core reinforcement 12. The lock nut 42 is fastened to the lower end portion of the core reinforcement joint 41. A lock nut 43 is screwed into the second core bar 22. The lock nut 43 is fastened to the upper end portion of the core reinforcement joint 41. Corresponding core bars 12 and 22 are connected to each other so that the tensile force can be reliably transmitted by filling and solidifying the grout and tightening the lock nuts 42 and 43.
As a result, the main bars 11, 12, 21, and 22 of the reinforcing bar erected body 2 can reliably bear the tensile strength of the column 1.

上記の鉄筋篭建込体２は、次のようにして構築される。
各鉄筋篭１０，２０は、工場などで先組みして、鉄筋コンクリート構造物の施工現場に搬入する。施工現場において先組みを行なってもよい。そして、建て込み済みの第１鉄筋篭１０の上方に第２鉄筋篭２０を継ぎ足すようにして、複数の鉄筋籠を下段から順次建て込む。 The above-mentioned reinforcing bar erected body 2 is constructed as follows.
Reinforcing rods 10 and 20 are assembled in advance at a factory or the like and are carried to a construction site of a reinforced concrete structure. Pre-assembly may be performed at the construction site. Then, a plurality of reinforcing bar rods are sequentially built from the bottom so that the second reinforcing bar rods 20 are added above the first reinforcing bar rods 10 that have already been built.

第２鉄筋篭２０の建て込み方法を更に詳述する。
［前工程］
第２鉄筋篭２０の先組みの際に、第２芯筋２２を第２外周筋２１及び第２剪断補強筋２３に対して軸方向（上下）に移動可能にしておく。具体的には、第２外周筋２１と第２剪断補強筋２３とは、しっかりと結束する一方、第２芯筋２２と第２剪断補強筋２３とは、緩く結束するか、または結束しないことにする。
なお、これに代えて、第２芯筋２２と第２剪断補強筋２３をしっかりと結束する一方、第２外周筋２１と第２剪断補強筋２３を緩く結束するか、結束しないことにしてもよい。 The method for building the second rebar rod 20 will be described in further detail.
[pre-process]
When the second reinforcing bar rod 20 is pre-assembled, the second core bar 22 is movable in the axial direction (up and down) with respect to the second outer peripheral bar 21 and the second shear reinforcement bar 23. Specifically, the second outer peripheral reinforcement 21 and the second shear reinforcement 23 are tightly bound, while the second core reinforcement 22 and the second shear reinforcement 23 are loosely bound or not bound. To.
Instead of this, the second core reinforcement 22 and the second shear reinforcement 23 are tightly bound, while the second outer peripheral reinforcement 21 and the second shear reinforcement 23 are loosely bound or not bound. Good.

また、図３（ａ）に示すように、第２鉄筋篭２０のための吊り治具５０を用意する。吊り治具５０は、例えば第２鉄筋篭２０の上端部に被さる板形状になっている。吊り治具５０の主筋２１，２２と対応する複数箇所には、挿通孔５１が形成されている。各挿通孔５１に、対応する主筋２１，２２の上端部を挿通する。そして、各主筋２１，２２の吊り治具５０よりも上側の部分に、ナット５２（ストッパ）をねじ込む。ナット５２は、挿通孔５１より大径である。このとき、第２外周筋２１のナット５２を第２芯筋２２のナット５２よりも深くねじ込むことで、第２外周筋２１の最上端からナット５２までの距離を、第２芯筋２２の最上端からナット５２までの距離より大きくする。 Further, as shown in FIG. 3A, a hanging jig 50 for the second rebar rod 20 is prepared. The hanging jig 50 has, for example, a plate shape that covers the upper end portion of the second reinforcing bar rod 20. Insertion holes 51 are formed at a plurality of locations corresponding to the main bars 21 and 22 of the hanging jig 50. The upper end portions of the corresponding main bars 21 and 22 are inserted into the respective insertion holes 51. Then, a nut 52 (stopper) is screwed into a portion above the hanging jig 50 of each main reinforcement 21, 22. The nut 52 has a larger diameter than the insertion hole 51. At this time, the nut 52 of the second outer periphery 21 is screwed deeper than the nut 52 of the second core 22 so that the distance from the uppermost end of the second outer periphery 21 to the nut 52 is increased. The distance from the upper end to the nut 52 is made larger.

第２鉄筋篭２０の各主筋２１，２２の下端部には、ナット３３，４３及び継手３１，４１を順次ねじ込む。 Nuts 33 and 43 and joints 31 and 41 are sequentially screwed into the lower ends of the main bars 21 and 22 of the second reinforcing bar rod 20.

図３（ｂ）に示すように、建て込み済みの第１鉄筋篭１０の主筋１１，１２の上端部は、互いにほぼ同一高さに揃えられている。これら主筋１１，１２の上端部には、それぞれナット３２，４２をねじ込む。 As shown in FIG. 3B, the upper ends of the main bars 11 and 12 of the built-in first reinforcing bar rod 10 are aligned at substantially the same height. Nuts 32 and 42 are screwed into the upper ends of the main bars 11 and 12, respectively.

［吊り工程］
図３（ａ）に示すように、吊り治具５０には、クレーン（図示省略）の吊りロープ３を連結する。そして、上記クレーンで吊り治具５０を水平に吊り揚げる。すると、第２鉄筋篭２０の各主筋２１，２２がほぼ鉛直になるとともに、第２外周筋２１のナット５２が吊り治具５０に引っ掛かり、更に第２芯筋２２が第２外周筋２１に対して降下して、第２芯筋２２のナット５２が吊り治具５０に引っ掛かる。これらの引っ掛かりによって、主筋２１，２２ひいては第２鉄筋篭２０が、吊り治具５０から吊り下げられた状態で支持される。このとき、第２外周筋２１のナット５２が第２芯筋２２のナット５２よりも深くねじ込まれている分だけ、第２外周筋２１が第２芯筋２２よりも上方にずれて位置する。ひいては、第２外周筋２１の下端部が、第２芯筋２２の下端部よりも高所に位置する。 [Hanging process]
As shown in FIG. 3A, a suspension rope 3 of a crane (not shown) is connected to the suspension jig 50. Then, the hanging jig 50 is lifted horizontally by the crane. Then, the main reinforcing bars 21 and 22 of the second reinforcing bar rod 20 are almost vertical, the nut 52 of the second outer peripheral bar 21 is hooked on the hanging jig 50, and the second core bar 22 is further against the second outer peripheral bar 21. The nut 52 of the second core reinforcement 22 is caught by the hanging jig 50. By these catches, the main bars 21 and 22 and the second reinforcing bar rod 20 are supported in a state of being hung from the hanging jig 50. At this time, the second outer peripheral muscle 21 is positioned higher than the second core reinforcement 22 by the amount that the nut 52 of the second outer peripheral reinforcement 21 is screwed deeper than the nut 52 of the second core reinforcement 22. As a result, the lower end portion of the second outer circumferential bar 21 is positioned higher than the lower end portion of the second core bar 22.

［上方配置工程］
図３（ｂ）に示すように、さらに上記クレーンを操作して、上記吊り揚げた第２鉄筋篭２０を、建て込み済みの第１鉄筋篭１０の上方に配置する。そして、第１鉄筋篭１０と第２鉄筋篭２０の互いに対応する外周筋１１，２１どうし、及び互いに対応する芯筋１２，２２どうしをそれぞれ上下に対向させる。このとき、互いに対応する外周筋１１，２１どうし間の距離Ｌ_１が、互いに対応する芯筋１２，２２どうし間の距離Ｌ_２よりも大きくなる（Ｌ_１＞Ｌ_２）。 [Upper placement process]
As shown in FIG. 3 (b), the crane is further operated to place the lifted second rebar rod 20 above the built-in first rebar rod 10. As shown in FIG. Then, the peripheral reinforcing bars 11 and 21 corresponding to each other of the first reinforcing bar rod 10 and the second reinforcing bar rod 20 and the core reinforcing bars 12 and 22 corresponding to each other are opposed to each other vertically. In this case, the distance _{L 1} between and if the outer peripheral muscle 11 and 21 corresponding to each other, is larger than the distance _{L 2} between and concentric muscle 12, 22 corresponding to each other _(L _{1> L} 2).

［芯筋接合工程］
次に、図３（ｃ）に示すように、対応する芯筋１２，２２どうしを、芯筋接合手段４０を介して接合する。詳しくは、第２芯筋２２の下端部の芯筋継手４１を下降方向に回して、芯筋継手４１の下側の約半分を第１芯筋１２の上端部の外周にねじ込むことで、芯筋継手４１を第２芯筋２２から第１芯筋１２に跨らせる。そして、上下一対のロックナット４３，４２をそれぞれ芯筋継手４１に向けて締め付ける。このとき、第１外周筋１１の上端部と第２外周筋２１の下端部の間が大きく空いているから、外周筋１１，２１に邪魔されることなく、芯筋１２，２２の接合作業を簡易に行うことができる。 [Core reinforcement joining process]
Next, as shown in FIG. 3C, the corresponding core muscles 12 and 22 are joined together through the core muscle joining means 40. Specifically, the core reinforcement joint 41 at the lower end portion of the second core reinforcement 22 is rotated in the descending direction, and the lower half of the core reinforcement joint 41 is screwed into the outer periphery of the upper end portion of the first core reinforcement 12. The muscle joint 41 is extended from the second core muscle 22 to the first core muscle 12. Then, the pair of upper and lower lock nuts 43, 42 are tightened toward the core reinforcement joint 41. At this time, since the space between the upper end portion of the first outer periphery muscle 11 and the lower end portion of the second outer periphery muscle 21 is large, the joining operation of the core muscles 12 and 22 can be performed without being disturbed by the outer periphery muscles 11 and 21. It can be done easily.

［外周筋接合作業］
次に、図３（ｄ）に示すように、上記クレーンを操作して、吊り治具５０を下降させる。すると、第２芯筋２２は、そのままの高さに留まる一方、第２外周筋２１及び第２剪断補強筋２３は、吊り治具５０と一体に降下する。これによって、第２外周筋２１と第２芯筋２２とを、互いにほぼ同じ高さに揃える。続いて、対応する外周筋１１，２１どうしを、外周筋接合手段３０を介して接合する。詳しくは、第２外周筋２１の下端部の外周筋継手３１を下降方向に回して、外周筋継手３１の下側の約半分を第１外周筋１１の上端部の外周にねじ込むことで、外周筋継手３１を第２外周筋２１から第１外周筋１１に跨らせる。そして、上下一対のロックナット３３，３２をそれぞれ外周筋継手３１に向けて締め付ける。このようにして、第２鉄筋篭２０を第１鉄筋篭１０の上方に建て込むことができる。 [Peripheral muscle joining work]
Next, as shown in FIG. 3D, the crane is operated to lower the suspension jig 50. Then, the second core reinforcement 22 remains at the same height, while the second outer peripheral reinforcement 21 and the second shear reinforcement 23 are lowered integrally with the hanging jig 50. As a result, the second outer circumferential bars 21 and the second core bars 22 are aligned at substantially the same height. Subsequently, the corresponding outer peripheral muscles 11 and 21 are joined to each other through the outer peripheral muscle joining means 30. Specifically, the outer peripheral reinforcing joint 31 at the lower end of the second outer peripheral rebar 21 is rotated in the descending direction, and the lower half of the outer peripheral reinforcing joint 31 is screwed into the outer periphery of the upper end of the first outer peripheral rebar 11 to The muscle joint 31 is straddled from the second outer circumferential muscle 21 to the first outer circumferential muscle 11. Then, the pair of upper and lower lock nuts 33 and 32 are tightened toward the outer peripheral joint 31, respectively. In this way, the second rebar rod 20 can be built above the first rebar rod 10.

［後工程］
その後、ナット５２を各主筋２１，２２の上端部から外す。そして、上記クレーンを操作して、吊り治具５０を、主筋２１，２２よりも上昇させることで第２鉄筋篭２０から外す。 [Post-process]
Thereafter, the nut 52 is removed from the upper ends of the main bars 21 and 22. And the said jig | tool is operated and the suspension jig | tool 50 is removed from the 2nd reinforcing bar rod 20 by raising rather than the main reinforcements 21 and 22. FIG.

［次段の鉄筋籠の継ぎ足し工程］
次いで、上記第２鉄筋篭２０を、建て込み済みの鉄筋籠とし、その上方に新たな鉄筋籠を上記と同様の手順で建て込む。これを反復することによって、柱１の鉄筋篭建込体２を構築できる。 [Additional process of next-stage rebar bar]
Next, the second reinforcing bar rod 20 is set as a built-in reinforcing rod rod, and a new reinforcing rod rod is built thereon in the same procedure as described above. By repeating this, the reinforcing bar erected body 2 of the pillar 1 can be constructed.

次に、本発明の他の実施形態を説明する。以下の実施形態において既述の形態と重複する構成に関しては、図面に同一符号を付して説明を簡略化する。
＜第２実施形態＞
図４〜図７は、本発明の第２実施形態を示したものである。図４に示すように、第２実施形態では、第２鉄筋篭２０の建て込みに際して、仮固定装置６０を用いる。仮固定装置６０は、仮固定継手６１（第１連結部）と、棒材６２（第２連結部）を備えている。仮固定継手６１は、筒状になっている。仮固定継手６１の内周には、雌ネジ山６１ａが形成されている。 Next, another embodiment of the present invention will be described. In the following embodiments, the same reference numerals are given to the drawings to simplify the description of the same configurations as those already described.
Second Embodiment
4 to 7 show a second embodiment of the present invention. As shown in FIG. 4, in the second embodiment, a temporary fixing device 60 is used when the second rebar bar 20 is built. The temporary fixing device 60 includes a temporary fixing joint 61 (first connecting portion) and a bar 62 (second connecting portion). The temporarily fixed joint 61 is cylindrical. A female thread 61 a is formed on the inner periphery of the temporary fixing joint 61.

棒材６２は、短い直線状になっている。棒材６２は、主筋１１，１２，２１，２２よりもかなり短い点を除き、主筋１１，１２，２１，２２と同じ形状の異形鉄筋にて構成されている。すなわち、棒材６２の外周の１８０度離れた２つの領域には、雄ネジ山６２ａが形成されている。これら２つのネジ形成領域間の棒材６２の外周は、平坦部６２ｂになっている。 The bar 62 has a short linear shape. The bar 62 is composed of a deformed bar having the same shape as the main bars 11, 12, 21, and 22 except that the bar 62 is considerably shorter than the main bars 11, 12, 21, and 22. That is, male threads 62 a are formed in two regions 180 degrees apart on the outer periphery of the bar 62. The outer periphery of the bar 62 between these two screw forming regions is a flat portion 62b.

図４では、仮固定継手６１が棒材６２より短いが、これら部材６１，６２が同程度の長さであってもよく、仮固定継手６１が棒材６２より長くてもよい。 In FIG. 4, the temporary fixing joint 61 is shorter than the bar 62, but these members 61, 62 may have the same length, and the temporary fixing joint 61 may be longer than the bar 62.

棒材６２の下端部が、仮固定継手６１の上側部分にねじ込まれている。このねじ込み量によって、仮固定装置６０全体の軸長を調節できる。なお、詳細な図示は省略するが、仮固定継手６１の雌ネジ山６１ａと棒材６２の雄ネジ山６２ａとの間には、軸方向に充分な（例えば数ｍｍ程度の）余裕が設けられている。 The lower end of the bar 62 is screwed into the upper part of the temporary fixed joint 61. The axial length of the entire temporary fixing device 60 can be adjusted by this screwing amount. Although not shown in detail, a sufficient margin (for example, about several mm) in the axial direction is provided between the female thread 61a of the temporary fixing joint 61 and the male thread 62a of the bar 62. ing.

第２実施形態において、建て込み済みの第１鉄筋篭１０の上方に第２鉄筋篭２０を建て込む方法を説明する。
［前工程］
第２鉄筋篭２０を先組みする際、第１実施形態（図３）と同様に、第２剪断補強筋２３の結束度合いを加減することで、第２芯筋２２を第２外周筋２１に対して軸方向（上下）に移動可能にしておく。詳しくは、第２外周筋２１と第２剪断補強筋２３とは、しっかりと結束する一方、第２芯筋２２と第２剪断補強筋２３とは、緩く結束するか、または結束しないことにする。なお、これに代えて、第２芯筋２２と第２剪断補強筋２３をしっかりと結束する一方、第２外周筋２１と第２剪断補強筋２３を緩く結束するか、結束しないことにしてもよい。 In the second embodiment, a method of building the second reinforcing bar rod 20 above the built-in first reinforcing bar rod 10 will be described.
[pre-process]
When the second reinforcing bar rod 20 is pre-assembled, the second core reinforcing bar 22 is changed to the second outer peripheral reinforcing bar 21 by adjusting the binding degree of the second shear reinforcing bar 23 as in the first embodiment (FIG. 3). On the other hand, it is movable in the axial direction (up and down). Specifically, the second outer peripheral reinforcement 21 and the second shear reinforcement 23 are tightly bound, while the second core reinforcement 22 and the second shear reinforcement 23 are loosely bound or not bound. . Instead of this, the second core reinforcement 22 and the second shear reinforcement 23 are tightly bound, while the second outer peripheral reinforcement 21 and the second shear reinforcement 23 are loosely bound or not bound. Good.

また、図５（ａ）に示すように、各主筋２１，２２の上端部を吊り治具５０の挿通孔５１に通し、かつナット５２を各主筋２１，２２の吊り治具５０よりも上側の部分にねじ込む。このとき、第２外周筋２１のナット５２を第２芯筋２２のナット５２よりも深くねじ込むことで、第２外周筋２１の最上端からナット５２までの距離を、第２芯筋２２の最上端からナット５２までの距離より大きくする。
第２鉄筋篭２０の各主筋２１，２２の下端部には、ナット３３，４３及び継手３１，４１を順次ねじ込む。
建て込み済みの第１鉄筋篭１０の主筋１１，１２の上端部には、それぞれナット３２，４２をねじ込む。 Further, as shown in FIG. 5A, the upper ends of the main bars 21 and 22 are passed through the insertion holes 51 of the hanging jig 50, and the nut 52 is located above the hanging jig 50 of the main bars 21 and 22. Screw into the part. At this time, the nut 52 of the second outer periphery 21 is screwed deeper than the nut 52 of the second core 22 so that the distance from the uppermost end of the second outer periphery 21 to the nut 52 is increased. The distance from the upper end to the nut 52 is made larger.
Nuts 33 and 43 and joints 31 and 41 are sequentially screwed into the lower ends of the main bars 21 and 22 of the second reinforcing bar rod 20.
Nuts 32 and 42 are screwed into the upper ends of the main bars 11 and 12 of the first reinforcing bar rod 10 that has already been built.

［吊り工程］
図５（ａ）に示すように、クレーンで吊り治具５０を水平に吊り揚げる。すると、第２鉄筋篭２０の各主筋２１，２２がほぼ鉛直になるとともに、第２外周筋２１のナット５２が吊り治具５０に引っ掛かり、更に第２芯筋２２が第２外周筋２１に対して降下して、第２芯筋２２のナット５２が吊り治具５０に引っ掛かる。これらの引っ掛かりによって、主筋２１，２２ひいては第２鉄筋篭２０が、吊り治具５０から吊り下げられた状態で支持される。このとき、第２外周筋２１のナット５２が第２芯筋２２のナット５２よりも深くねじ込まれている分だけ、第２外周筋２１が第２芯筋２２よりも上方にずれて位置する。ひいては、第２外周筋２１の下端部が、第２芯筋２２の下端部よりも高所に位置する。 [Hanging process]
As shown to Fig.5 (a), the lifting jig | tool 50 is lifted horizontally with a crane. Then, the main reinforcing bars 21 and 22 of the second reinforcing bar rod 20 are almost vertical, the nut 52 of the second outer peripheral bar 21 is hooked on the hanging jig 50, and the second core bar 22 is further against the second outer peripheral bar 21. The nut 52 of the second core reinforcement 22 is caught by the hanging jig 50. By these catches, the main bars 21 and 22 and the second reinforcing bar rod 20 are supported in a state of being hung from the hanging jig 50. At this time, the second outer peripheral muscle 21 is positioned higher than the second core reinforcement 22 by the amount that the nut 52 of the second outer peripheral reinforcement 21 is screwed deeper than the nut 52 of the second core reinforcement 22. As a result, the lower end portion of the second outer circumferential bar 21 is positioned higher than the lower end portion of the second core bar 22.

［上方配置工程］
図５（ｂ）に示すように、さらに上記クレーンを操作して、上記吊り揚げた第２鉄筋篭２０を、建て込み済みの第１鉄筋篭１０の上方に配置する。そして、第１鉄筋篭１０と第２鉄筋篭２０の互いに対応する外周筋１１，２１どうし、及び互いに対応する芯筋１２，２２どうしをそれぞれ上下に対向させる。このとき、互いに対応する外周筋１１，２１どうし間の距離Ｌ_１が、互いに対応する芯筋１２，２２どうし間の距離Ｌ_２よりも大きくなる（Ｌ_１＞Ｌ_２）。 [Upper placement process]
As shown in FIG.5 (b), the said crane is further operated and the said 2nd rebar rod 20 lifted is arrange | positioned above the built-in 1st rebar rod 10. FIG. Then, the peripheral reinforcing bars 11 and 21 corresponding to each other of the first reinforcing bar rod 10 and the second reinforcing bar rod 20 and the core reinforcing bars 12 and 22 corresponding to each other are opposed to each other vertically. In this case, the distance _{L 1} between and if the outer peripheral muscle 11 and 21 corresponding to each other, is larger than the distance _{L 2} between and concentric muscle 12, 22 corresponding to each other _(L _{1> L} 2).

［仮固定工程］
次に、図５（ｃ）に示すように、第１、第２鉄筋篭１０，２０の互いに対応する第１、第２外周筋１１，２１の中から一部の外周筋１１，２１を選択し、これら選択した対応外周筋１１，２１どうしを仮固定装置６０にて仮固定する。好ましくは、図６に示すように、鉄筋篭１０，２０の四隅の外周筋１１Ｅ，２１Ｅを選択して、第２外周筋２１Ｅの下端部を第１外周筋１１Ｅの上端部に仮固定装置６０を介して仮固定する。詳しくは、仮固定継手６１を下降方向に回して、その下端部を第１外周筋１１Ｅの上端部の外周にねじ込むことで、仮固定継手６１を棒材６２から第１外周筋１１Ｅに跨らせる。仮固定継手６１は、一方の外周筋１１と着脱可能に連結される「第１連結部」を構成する。また、第２外周筋２１Ｅの下端部の外周筋継手３１を下降方向に回して、該外周筋継手３１の下側部分を棒材６２の上端部の外周にねじ込むことで、外周筋継手３１を第２外周筋２１Ｅから棒材６２に跨らせる。棒材６２は、外周筋継手３１を介して他方の外周筋２１と着脱可能に連結される「第２連結部」を構成する。要するに、第２外周筋２１Ｅと、外周筋継手３１と、棒材６２と、仮固定継手６１と、第１外周筋１１Ｅとを上下に一列に連なるようにネジ結合する。これによって、吊り下げ状態の第２鉄筋篭２０の揺れを抑制又は防止できる。 [Temporary fixing process]
Next, as shown in FIG. 5C, a part of the outer peripheral bars 11 and 21 are selected from the first and second outer bars 11 and 21 corresponding to each other of the first and second reinforcing bar rods 10 and 20. Then, the selected corresponding peripheral muscles 11 and 21 are temporarily fixed by the temporary fixing device 60. Preferably, as shown in FIG. 6, the outer peripheral bars 11E and 21E at the four corners of the reinforcing bar rods 10 and 20 are selected, and the lower end part of the second outer peripheral bar 21E is temporarily attached to the upper end part of the first outer bar 11E. Temporarily fix via Specifically, the temporary fixing joint 61 is turned in the descending direction, and the lower end portion thereof is screwed into the outer periphery of the upper end portion of the first outer peripheral reinforcement 11E, so that the temporary fixing joint 61 is straddled from the bar 62 to the first outer peripheral reinforcement 11E. Make it. The temporarily fixed joint 61 constitutes a “first connecting portion” that is detachably connected to one of the outer peripheral reinforcing bars 11. Further, the outer peripheral joint 31 at the lower end of the second outer peripheral joint 21E is rotated in the descending direction, and the lower portion of the outer peripheral joint 31 is screwed into the outer periphery of the upper end of the bar 62, thereby It extends over the bar 62 from the second outer periphery 21E. The bar 62 constitutes a “second coupling portion” that is detachably coupled to the other outer circumferential bar 21 via the outer circumferential bar joint 31. In short, the second outer peripheral reinforcement 21E, the outer peripheral reinforcement joint 31, the bar 62, the temporary fixing joint 61, and the first outer periphery reinforcement 11E are screw-coupled so as to be lined up and down. Thereby, the swing of the 2nd rebar rod 20 of a suspended state can be suppressed or prevented.

上記仮固定工程では、ロックナット３２，３３を締め付ける必要は無い。
また、上述した前工程において、仮固定装置６０を第１外周筋１１Ｅの上端部に予め取り付けておき、仮固定工程では第２外周筋２１Ｅと仮固定装置６０との連結だけを行なうことにしてもよい。若しくは、前工程において、仮固定装置６０を第２外周筋２１Ｅの下端部に予め取り付けておき、仮固定工程では第１外周筋１１Ｅと仮固定装置６０との連結だけを行なうことにしてもよい。 In the temporary fixing step, there is no need to tighten the lock nuts 32 and 33.
Further, in the above-described pre-process, the temporary fixing device 60 is attached in advance to the upper end portion of the first outer circumferential reinforcement 11E, and only the connection between the second outer circumferential reinforcement 21E and the temporary fixing device 60 is performed in the temporary fixing process. Also good. Alternatively, in the previous step, the temporary fixing device 60 may be attached in advance to the lower end portion of the second outer circumferential bar 21E, and only the connection between the first outer circumferential bar 11E and the temporary fixing device 60 may be performed in the temporary fixing step. .

［芯筋接合工程］
次に、図７（ａ）に示すように、対応する芯筋１２，２２どうしを、芯筋接合手段４０を介して接合する。すなわち、第２芯筋２２の下端部の芯筋継手４１を下降方向に回して、芯筋継手４１の下側の約半分を第１芯筋１２の上端部の外周にねじ込むことで、芯筋継手４１を第２芯筋２２から第１芯筋１２に跨らせる。そして、上下一対のロックナット４２，４３をそれぞれ芯筋継手４１に向けて締め付ける。このとき、四隅以外の対応する外周筋１１，２１間が大きく空いているから、外周筋１１，２１に邪魔されることなく、芯筋１２，２２の接合作業を簡易に行うことができる。しかも、第２鉄筋篭２０が仮固定されることで揺れが抑制又は防止されているから、芯筋１２，２２の上記接合作業を一層容易に行うことができる。複数の外周筋１１，２１のうち四隅（一部）の外周筋１１Ｅ，２１Ｅだけを選択して仮固定装置６０にて仮固定することで、仮固定装置６０が芯筋１２，２２どうしの接合作業の邪魔になるのを回避できる。 [Core reinforcement joining process]
Next, as shown in FIG. 7A, the corresponding core muscles 12 and 22 are joined together through the core muscle joining means 40. That is, the core reinforcement joint 41 at the lower end portion of the second core reinforcement 22 is rotated in the descending direction, and the lower half of the core reinforcement joint 41 is screwed into the outer periphery of the upper end portion of the first core reinforcement 12. The joint 41 extends from the second core muscle 22 to the first core muscle 12. Then, the pair of upper and lower lock nuts 42 and 43 are tightened toward the core reinforcement joint 41, respectively. At this time, since there is a large space between the corresponding outer peripheral bars 11 and 21 other than the four corners, the core bars 12 and 22 can be easily joined without being obstructed by the outer peripheral bars 11 and 21. In addition, since the second rebar bar 20 is temporarily fixed, shaking is suppressed or prevented, so that the joining operation of the core bars 12 and 22 can be performed more easily. The temporary fixing device 60 joins the core muscles 12 and 22 by selecting only the outer peripheral muscles 11E and 21E at the four corners (part) from the plurality of outer peripheral muscles 11 and 21 and temporarily fixing them with the temporary fixing device 60. You can avoid getting in the way of work.

［撤去工程］
次に、図７（ｂ）に示すように、仮固定装置６０を撤去する。詳しくは、第２外周筋２１Ｅの外周筋継手３１を上昇方向に回すことで、該外周筋継手３１と棒材６２とのネジ結合を解除する。かつ、仮固定継手６１を上昇方向に回すことで、仮固定継手６１と第１外周筋１１Ｅとのネジ結合を解除する。これによって、仮固定装置６０全体の軸長（棒材６２の上端部から仮固定継手６１の下端部まで長さ）が、第２外周筋２１Ｅの下端部と第１外周筋１１Ｅの上端部間の距離より短くなる。したがって、仮固定装置６０を外周筋２１Ｅ，１１Ｅ間から簡単に撤去することができる。 [Removal process]
Next, as shown in FIG. 7B, the temporary fixing device 60 is removed. Specifically, the screw connection between the outer peripheral joint 31 and the bar 62 is released by turning the outer joint 31 of the second outer joint 21E in the upward direction. And the screw coupling of the temporary fixed joint 61 and the 1st outer periphery 11E is cancelled | released by turning the temporary fixed joint 61 to a raise direction. Thereby, the axial length of the entire temporary fixing device 60 (the length from the upper end of the bar 62 to the lower end of the temporary fixing joint 61) is between the lower end of the second outer circumferential bar 21E and the upper end of the first outer bar 11E. Shorter than the distance. Therefore, the temporary fixing device 60 can be easily removed from between the outer peripheral bars 21E and 11E.

［外周筋接合作業］
次に、図７（ｃ）に示すように、上記クレーンを操作して、吊り治具５０を下降させる。すると、第２芯筋２２は、そのままの高さに留まる一方、第２外周筋２１及び第２剪断補強筋２３は、吊り治具５０と一体に降下する。これによって、第２外周筋２１と第２芯筋２２とを、互いにほぼ同じ高さに揃える。続いて、対応する各外周筋１１，２１どうし（上記選択した外周筋１１Ｅ，２１Ｅどうしを含む）を、外周筋接合手段３０を介して接合する。すなわち、第２外周筋２１の下端部の外周筋継手３１を下降方向に回して、外周筋継手３１の下側の約半分を第１外周筋１１の上端部の外周にねじ込むことで、外周筋継手３１を第２外周筋２１から第１外周筋１１に跨らせる。そして、上下一対のロックナット３２，３３をそれぞれ外周筋継手３１に向けて締め付ける。このようにして、第２鉄筋篭２０を第１鉄筋篭１０の上方に建て込むことができる。 [Peripheral muscle joining work]
Next, as shown in FIG. 7C, the crane is operated to lower the hanging jig 50. Then, the second core reinforcement 22 remains at the same height, while the second outer peripheral reinforcement 21 and the second shear reinforcement 23 are lowered integrally with the hanging jig 50. As a result, the second outer circumferential bars 21 and the second core bars 22 are aligned at substantially the same height. Subsequently, the corresponding outer circumferential muscles 11 and 21 (including the selected outer circumferential muscles 11E and 21E) are joined via the outer circumference muscle joining means 30. That is, the outer peripheral reinforcement 31 at the lower end of the second outer periphery 21 is rotated in the downward direction, and the lower half of the outer periphery joint 31 is screwed into the outer periphery of the upper end of the first outer periphery 11, thereby The joint 31 is extended from the second outer periphery 21 to the first outer periphery 11. Then, the pair of upper and lower lock nuts 32 and 33 are tightened toward the outer peripheral joint 31, respectively. In this way, the second rebar rod 20 can be built above the first rebar rod 10.

［次段の鉄筋籠の継ぎ足し工程］
次いで、上記第２鉄筋篭２０を、建て込み済みの鉄筋籠とし、その上方に新たな鉄筋籠を上記と同様の手順で建て込む。これを反復することによって、柱の鉄筋篭建込体２を構築できる。 [Additional process of next-stage rebar bar]
Next, the second reinforcing bar rod 20 is set as a built-in reinforcing rod rod, and a new reinforcing rod rod is built thereon in the same procedure as described above. By repeating this, it is possible to construct the column reinforcing bar erected body 2.

＜第３実施形態＞
図８〜図１０は、本発明の第３実施形態を示したものである。図８（ａ）に示すように、第３実施形態では、吊り治具５０にクランプ５３が設けられている。このクランプ５３で第２外周筋２１の上端部を把持する。吊り治具５０に挿通孔５１を形成する必要は無い。 <Third Embodiment>
8 to 10 show a third embodiment of the present invention. As shown to Fig.8 (a), the clamp 53 is provided in the hanging jig | tool 50 in 3rd Embodiment. The clamp 53 holds the upper end portion of the second outer circumferential muscle 21. There is no need to form the insertion hole 51 in the hanging jig 50.

また、図９に示すように、板状の引掛部材５４を用意する。引掛部材５４の面積は、第２鉄筋篭２０全体の断面より小さく、かつ第２鉄筋篭２０の芯筋配置領域の断面よりは大きい。引掛部材５４には、複数の挿通孔５５が形成されている。これら挿通孔５５は、第２芯筋２２と一対一に対応している。各第２芯筋２２の上端部を対応する挿通孔５５に通す。各第２芯筋２２の挿通孔５５より上側の部分には、ナット５２をねじ込む。ナット５２は、挿通孔５５より大径である。 Further, as shown in FIG. 9, a plate-like hooking member 54 is prepared. The area of the hook member 54 is smaller than the entire cross section of the second reinforcing bar rod 20 and larger than the cross section of the core reinforcing bar arrangement region of the second reinforcing bar rod 20. A plurality of insertion holes 55 are formed in the hooking member 54. These insertion holes 55 correspond one-to-one with the second core reinforcement 22. The upper end portion of each second core bar 22 is passed through the corresponding insertion hole 55. A nut 52 is screwed into a portion above the insertion hole 55 of each second core bar 22. The nut 52 has a larger diameter than the insertion hole 55.

第３実施形態において、図８（ａ）に示すように、クレーンにて吊り治具５０を水平に吊り揚げると（吊り工程）、第２外周筋２１がクランプ５３から吊り下げられた状態で支持される。また、図８（ａ）の二点鎖線及び図９に示すように、引掛部材５４が、第２外周筋２１に結束された第２剪断補強筋２３のうち、最上部かつ第２芯筋２２の傍を通る中子筋２３Ｃ（剪断補強筋）に引っ掛かって水平に支持される。さらに、第２芯筋２２が第２外周筋２１に対して降下して、ナット５２が引掛部材５４に引っ掛かる。この引っ掛かりによって、第２芯筋２２が、吊り下げ状態で支持される。このとき、第２芯筋２２の下端が第２外周筋２１の下端より下に位置する。したがって、図８（ｂ）に示すように、第２鉄筋篭２０を第１鉄筋篭１０の上方に配置すれば、外周筋２１，１１どうし間の距離が芯筋２２，１２どうし間の距離より大きくなる（上方配置工程）。 In the third embodiment, as shown in FIG. 8A, when the lifting jig 50 is lifted horizontally by a crane (hanging process), the second outer periphery 21 is supported in a state of being hung from the clamp 53. Is done. Further, as shown in the two-dot chain line of FIG. 8A and FIG. 9, the hooking member 54 is the uppermost part of the second shear reinforcing bars 23 bound to the second outer peripheral bars 21 and the second core bars 22. It is caught horizontally by the core muscle 23C (shear reinforcement) passing by the side of and is supported horizontally. Further, the second core bar 22 descends with respect to the second outer peripheral bar 21, and the nut 52 is hooked on the hook member 54. By this hooking, the second core reinforcement 22 is supported in a suspended state. At this time, the lower end of the second core bar 22 is located below the lower end of the second outer peripheral bar 21. Therefore, as shown in FIG. 8B, if the second reinforcing bar rod 20 is arranged above the first reinforcing bar rod 10, the distance between the outer reinforcing bars 21 and 11 is greater than the distance between the core bars 22 and 12. Increased (upward placement step).

次いで、図８（ｃ）に示すように、四隅（選択した一部）の外周筋２１Ｅ，１１Ｅどうしを仮固定装置６０にて仮固定する（仮固定工程）。これによって、第２鉄筋篭２０の揺れを抑制又は防止できる。 Next, as shown in FIG. 8C, the outer peripheral bars 21E and 11E at the four corners (selected portions) are temporarily fixed by the temporary fixing device 60 (temporary fixing step). Thereby, the shaking of the 2nd reinforcing bar rod 20 can be suppressed or prevented.

続いて、図１０（ａ）に示すように、対応する芯筋２２，１２どうしを芯筋接合手段４０にて接合する（芯筋接合工程）。このとき、四隅以外の対応する外周筋１１，２１間が大きく空いているから、外周筋１１，２１に邪魔されることなく、芯筋１２，２２の接合作業を簡易に行うことができる。しかも、第２鉄筋篭２０が仮固定されることで揺れが抑制又は防止されているから、芯筋１２，２２の上記接合作業を一層容易に行うことができる。複数の外周筋１１，２１のうち四隅（一部）の外周筋１１Ｅ，２１Ｅだけを選択して仮固定装置６０にて仮固定することで、仮固定装置６０が、芯筋１２，２２どうしの接合作業の邪魔になるのを回避できる。 Subsequently, as shown in FIG. 10A, the corresponding core reinforcing bars 22 and 12 are bonded to each other by the core reinforcing bonding means 40 (core reinforcing bonding step). At this time, since there is a large space between the corresponding outer peripheral bars 11 and 21 other than the four corners, the core bars 12 and 22 can be easily joined without being obstructed by the outer peripheral bars 11 and 21. In addition, since the second rebar bar 20 is temporarily fixed, shaking is suppressed or prevented, so that the joining operation of the core bars 12 and 22 can be performed more easily. By selecting only the outer peripheral muscles 11E and 21E at the four corners (part) from the plurality of outer peripheral reinforcing bars 11 and 21 and temporarily fixing them with the temporary fixing device 60, the temporary fixing device 60 can be connected between the core reinforcing bars 12 and 22. It is possible to avoid interfering with the joining work.

次に、図１０（ｂ）に示すように、仮固定装置６０を撤去する（撤去工程）。 Next, as shown in FIG.10 (b), the temporary fixing apparatus 60 is removed (removal process).

次に、図１０（ｃ）に示すように、吊り治具５０を下降させて、第２外周筋２１を下げ、対応する外周筋２１，１１どうしを外周筋接合手段３０にて接合する（外周筋接合工程）。 Next, as shown in FIG. 10 (c), the hanging jig 50 is lowered to lower the second outer circumferential bars 21, and the corresponding outer circumferential bars 21, 11 are joined by the outer circumferential bar joining means 30 (outer circumference). Muscle joining process).

＜第４実施形態＞
図１１〜図１３は、本発明の第４実施形態を示したものである。図１１（ａ）及び図１２に示すように、第４実施形態では、第２鉄筋篭２０の先組みの際に、複数（図１２では４つ）の第２芯筋２２の中間部に補助フープ筋２６（剪断補強筋）を巻き付ける。第２芯筋２２と補助フープ筋２６とはきつく結束する。補助フープ筋２６は、第２外周筋２１より内側に在り、第２外周筋２１から切り離されている。第２外周筋２１と第２芯筋２２とは、既述の実施形態と同様に、結束度合いを加減することによって、軸方向に相対移動可能にする。 <Fourth embodiment>
11 to 13 show a fourth embodiment of the present invention. As shown in FIGS. 11A and 12, in the fourth embodiment, when the second rebar rod 20 is pre-assembled, an intermediate portion of a plurality of (four in FIG. 12) second core bars 22 is assisted. The hoop muscle 26 (shear reinforcement) is wound. The second core muscle 22 and the auxiliary hoop muscle 26 are tightly bound. The auxiliary hoop muscle 26 is located on the inner side of the second outer periphery muscle 21 and is separated from the second outer periphery muscle 21. The second outer peripheral bars 21 and the second core bars 22 can be moved relative to each other in the axial direction by increasing or decreasing the degree of binding, as in the embodiment described above.

また、引掛棒５６を用意する。引掛棒５６は、第２鉄筋篭２０の一辺の長さより少し大きな鋼材にて構成されている。この引掛棒５６を、第２鉄筋篭２０の軸線と直交する方向に向けて、第２鉄筋篭２０における補助フープ筋２６よりも下側の部分に差し込む。この実施形態では、第２鉄筋篭２０の最下段の第２剪断補強筋２３とその直ぐ上の第２剪断補強筋２３との間に、引掛棒５６を差し入れ、最下段の第２剪断補強筋２３に引掛棒５６の両端部を載せる。 A hook 56 is also prepared. The hook 56 is made of a steel material that is slightly larger than the length of one side of the second reinforcing bar rod 20. The hook 56 is inserted into a portion of the second reinforcing bar rod 20 below the auxiliary hoop bar 26 in a direction perpendicular to the axis of the second reinforcing bar rod 20. In this embodiment, the hook rod 56 is inserted between the lowermost second shear reinforcing bar 23 of the second reinforcing bar rod 20 and the second upper shear reinforcing bar 23 immediately above the second shear reinforcing bar 23, and the lowermost second shear reinforcing bar 23. 23, the both ends of the hooking rod 56 are placed.

第４実施形態において、図１１（ａ）に示すように、第２外周筋２１の上端部を第３実施形態（図８）と同様のクランプ５３で把持した後、クレーンにて吊り治具５０を水平に吊り揚げると（吊り工程）、第２外周筋２１がクランプ５３から吊り下げられた状態で支持される。また、図１１（ａ）の二点鎖線及び図１２に示すように、第２芯筋２２が第２外周筋２１に対して降下して、該第２芯筋２２と一体の補助フープ筋２６が引掛棒５６に引っ掛かる。この引っ掛かりによって、第２芯筋２２が支持される。このとき、第２芯筋２２の下端が第２外周筋２１の下端よりも下に位置する。したがって、図１１（ｂ）に示すように、第２鉄筋篭２０を第１鉄筋篭１０の上方に配置すれば、外周筋２１，１１どうし間の距離が芯筋２２，１２どうし間の距離より大きくなる（上方配置工程）。 In 4th Embodiment, as shown to Fig.11 (a), after holding the upper end part of the 2nd outer periphery muscle 21 with the clamp 53 similar to 3rd Embodiment (FIG. 8), the hanging jig | tool 50 is carried out with the crane. Is horizontally lifted (suspending step), the second outer circumferential muscle 21 is supported in a state of being suspended from the clamp 53. Further, as shown in the two-dot chain line of FIG. 11A and FIG. 12, the second core muscle 22 descends with respect to the second outer peripheral muscle 21, and the auxiliary hoop muscle 26 integrated with the second core muscle 22. Is caught by the hook 56. The second core 22 is supported by this catch. At this time, the lower end of the second core reinforcement 22 is positioned below the lower end of the second outer periphery reinforcement 21. Therefore, as shown in FIG. 11 (b), if the second reinforcing bar rod 20 is arranged above the first reinforcing bar rod 10, the distance between the outer circumferential bars 21 and 11 is greater than the distance between the core bars 22 and 12. Increased (upward placement step).

次いで、図１１（ｃ）に示すように、四隅（選択した一部）の外周筋２１Ｅ，１１Ｅどうしを仮固定装置６０にて仮固定する（仮固定工程）。これによって、第２鉄筋篭２０の揺れを抑制又は防止できる。 Next, as shown in FIG. 11C, the outer peripheral bars 21E and 11E at the four corners (selected portions) are temporarily fixed by the temporary fixing device 60 (temporary fixing step). Thereby, the shaking of the 2nd reinforcing bar rod 20 can be suppressed or prevented.

続いて、図１３（ａ）に示すように、対応する芯筋２２，１２どうしを芯筋接合手段４０にて接合する（芯筋接合工程）。このとき、四隅以外の外周筋１１，２１間が大きく空いているから、外周筋１１，２１に邪魔されることなく、芯筋１２，２２の接合作業を簡易に行うことができる。しかも、第２鉄筋篭２０が仮固定されることで揺れが抑制又は防止されているから、芯筋１２，２２の上記接合作業を一層容易に行うことができる。複数の外周筋１１，２１のうち四隅（一部）の外周筋１１Ｅ，２１Ｅだけを選択して仮固定装置６０にて仮固定することで、仮固定装置６０が、芯筋１２，２２どうしの接合作業の邪魔になるのを回避できる。 Subsequently, as shown in FIG. 13A, the corresponding core reinforcing bars 22, 12 are bonded by the core reinforcing bonding means 40 (core reinforcing bonding step). At this time, since the space between the outer peripheral bars 11 and 21 other than the four corners is large, the joining work of the core bars 12 and 22 can be easily performed without being obstructed by the outer peripheral bars 11 and 21. In addition, since the second rebar bar 20 is temporarily fixed, shaking is suppressed or prevented, so that the joining operation of the core bars 12 and 22 can be performed more easily. By selecting only the outer peripheral muscles 11E and 21E at the four corners (part) from the plurality of outer peripheral reinforcing bars 11 and 21 and temporarily fixing them with the temporary fixing device 60, the temporary fixing device 60 can be connected between the core reinforcing bars 12 and 22. It is possible to avoid interfering with the joining work.

次に、図１３（ｂ）に示すように、仮固定装置６０を撤去する（撤去工程）。また、引掛棒５６を第２鉄筋篭２０から引き抜いて撤去する。 Next, as shown in FIG. 1 3 (b), the temporary fixing device 60 is removed (removal step). Further, the hooking rod 56 is pulled out from the second reinforcing bar rod 20 and removed.

次に、図１３（ｃ）に示すように、吊り治具５０を下降させて、第２外周筋２１を下げ、対応する外周筋２１，１１どうしを外周筋接合手段３０にて接合する（外周筋接合工程）。
Next, as shown in FIG. 1 3 (c), the hanging jig 50 is lowered to lower the second outer periphery 21 and the corresponding outer periphery 21, 21 is joined by the outer periphery joining means 30 ( Peripheral muscle joining process).

＜第５実施形態＞
図１４及び図１５は、本発明の第５実施形態を示したものである。図１４（ａ）に示すように、第５実施形態では、第２鉄筋篭２０の第２外周筋２１の長さが第２芯筋２２よりも短い。図１５（ｂ）に示すように、鉄筋篭１０，２０の対応する第１、第２外周筋１１，２１どうしは、中継筋７１を介して連結されている。中継筋７１は、第２芯筋２２の長さと第２外周筋２１の長さの差よりも少し短い。中継筋７１は、好ましくは主筋１１，２１，１２，２２と同種の鉄筋にて構成され、その外周には雄ネジ山（図示省略）が形成されている。外周継手３１を介して、第２外周筋２１の下端部と中継筋７１の上端部が接合されている。外周継手３１の両端部にはロックナット３３，７３が締め込まれている。さらに、上記外周継手３１と同じ構造の外周継手３７を介して、中継筋７１の下端部と第１外周筋１１の上端部が接合されている。外周継手３７の両端部にはロックナット７２，３２が締め込まれている。 <Fifth Embodiment>
14 and 15 show a fifth embodiment of the present invention. As shown in FIG. 14A, in the fifth embodiment, the length of the second outer circumferential bar 21 of the second reinforcing bar rod 20 is shorter than the second core bar 22. As shown in FIG. 15 (b), the corresponding first and second outer peripheral bars 11, 21 of the reinforcing bar rods 10, 20 are connected via a relay bar 71. The relay bar 71 is slightly shorter than the difference between the length of the second core bar 22 and the length of the second outer peripheral bar 21. The relay bars 71 are preferably made of the same type of reinforcing bars as the main bars 11, 21, 12, 22 and male threads (not shown) are formed on the outer periphery thereof. The lower end portion of the second outer peripheral reinforcement 21 and the upper end portion of the relay reinforcement 71 are joined via the outer peripheral joint 31. Lock nuts 33 and 73 are fastened to both ends of the outer joint 31. Furthermore, the lower end of the relay bar 71 and the upper end of the first outer bar 11 are joined via the outer joint 37 having the same structure as the outer joint 31. Lock nuts 72 and 32 are fastened to both ends of the outer joint 37.

前工程において、第２鉄筋篭２０を先組みする際は、第２外周筋２１及び第２芯筋２２の上端部の高さを揃えることで、第２芯筋２２の下端部を第２外周筋２１の下端部よりも下方へ延出させる。また、第２剪断補強筋２３を第２外周筋２１及び第２芯筋２２にしっかりと結束することで、第２鉄筋篭２０の先組みの段階から、第２外周筋２１と第２芯筋２２とが自由に相対移動しないようにする。さらに、各第２外周筋２１の下端部にはロックナット３３と外周筋継手３１を順次ねじ込み、かつ各第２芯筋２２の下端部にはロックナット４３と芯筋継手４１を順次ねじ込む。さらには、建て込み済みの第１鉄筋篭１０の各第１外周筋１１の上端部に、ロックナット３２と外周筋継手３７を順次ねじ込む。第１芯筋１２の上端部には、ロックナット４２だけをねじ込んでおく。さらに、図１４（ｂ）に示すように、中継継手７１の両端部には、ロックナット７２，７３をねじ込んでおく。
なお、外周筋継手３７を、外周筋１１に代えて、中継継手７１にねじ込んでおくことにしてもよい。 In the previous step, when the second reinforcing bar rod 20 is pre-assembled, the lower ends of the second rebars 22 are aligned with the second outer periphery by aligning the heights of the upper ends of the second outer rebars 21 and the second rebars 22. It extends below the lower end of the line 21. In addition, by firmly binding the second shear reinforcing bar 23 to the second outer peripheral bar 21 and the second core bar 22, the second outer bar 21 and the second core bar can be started from the stage of the second rebar bar 20 assembling. 22 so as not to move freely relative to each other. Further, the lock nut 33 and the outer joint 31 are sequentially screwed into the lower ends of the second outer reinforcing bars 21, and the lock nut 43 and the core reinforcing joint 41 are sequentially screwed into the lower ends of the second core bars 22. Further, the lock nut 32 and the outer peripheral joint 37 are sequentially screwed into the upper end portions of the first outer peripheral bars 11 of the first reinforcing bar rod 10 that has already been built. Only the lock nut 42 is screwed into the upper end portion of the first core reinforcement 12. Further, as shown in FIG. 14B, lock nuts 72 and 73 are screwed into both ends of the relay joint 71.
Note that the outer peripheral joint 37 may be screwed into the relay joint 71 instead of the outer peripheral joint 11.

図１４（ａ）に示すように、第２鉄筋篭２０を第１鉄筋篭１０の上方に建て込む際は、第３実施形態（図８）と同様のクランプ５３で第２外周筋２１の上端部を把持した後、クレーンにて吊り治具５０を吊り揚げる（吊り工程）。これによって、第２鉄筋篭２０が、吊り治具５０から吊り下げられた状態で支持される。このとき、第２外周筋２１の長さと第２芯筋２２の長さの差分だけ、第２芯筋２２の下端が第２外周筋２１の下端より下に位置する。したがって、図１４（ｂ）に示すように、第２鉄筋篭２０を第１鉄筋篭１０の上方に配置すれば（上方配置工程）、対応する外周筋２１，１１どうし間の距離が、対応する芯筋２２，１２どうし間の距離より大きくなる。 As shown in FIG. 14A, when the second reinforcing bar rod 20 is built above the first reinforcing bar rod 10, the upper end of the second outer circumferential bar 21 is clamped by the same clamp 53 as in the third embodiment (FIG. 8). After gripping the part, the hanging jig 50 is lifted by a crane (hanging step). Accordingly, the second reinforcing bar rod 20 is supported in a state of being hung from the hanging jig 50. At this time, the lower end of the second outer rebar 22 is positioned below the lower end of the second outer rebar 21 by the difference between the length of the second outer rebar 21 and the length of the second core 22. Therefore, as shown in FIG. 14 (b), if the second reinforcing bar rod 20 is arranged above the first reinforcing bar rod 10 (upper arrangement step), the distance between the corresponding outer circumferential bars 21, 11 corresponds. It becomes larger than the distance between the core bars 22 and 12.

第５実施形態では、外周筋１１，２１によって接合時期が互いに異なる。図１４（ｃ）に示すように、鉄筋篭１０，２０の四隅（選択した一部）の外周筋１１Ｅ，２１Ｅについては、上記上方配置工程の後、かつ芯筋２２，１２の接合工程よりも先に接合する（先接合工程）。具体的には、中継筋７１Ｅを、対応する外周筋２１Ｅ，１１Ｅどうし間に差し入れ、第２外周筋２１Ｅと中継筋７１Ｅと第１外周筋１１Ｅを上下に一直線に並べる。続いて、第２外周筋２１Ｅの外周筋継手３１を下降方向に回して、第２外周筋２１Ｅから中継筋７１Ｅに跨らせる。また、第１外周筋１１Ｅの外周筋継手３７を上昇方向に回して、第１外周筋１１Ｅから中継筋７１Ｅに跨らせる。これによって、第２鉄筋篭２０の揺れを抑制又は防止できる。 In the fifth embodiment, the joining timing differs depending on the outer circumferential bars 11 and 21. As shown in FIG. 14 (c), the outer peripheral bars 11E and 21E at the four corners (selected portions) of the reinforcing bar rods 10 and 20 are after the above upper arrangement process and more than the joining process of the core bars 22 and 12. Join first (pre-joining step). Specifically, the relay reinforcement 71E is inserted between the corresponding outer periphery reinforcements 21E and 11E, and the second outer periphery reinforcement 21E, the relay reinforcement 71E, and the first outer periphery reinforcement 11E are aligned vertically. Subsequently, the outer peripheral reinforcement joint 31 of the second outer periphery reinforcement 21E is turned in the descending direction so as to straddle the second outer periphery reinforcement 21E over the relay reinforcement 71E. Moreover, the outer periphery reinforcement joint 37 of the 1st outer periphery reinforcement 11E is turned to an up direction, and is straddled from the 1st outer periphery reinforcement 11E to the relay reinforcement 71E. Thereby, the shaking of the 2nd reinforcing bar rod 20 can be suppressed or prevented.

この段階では、第２外周筋２１Ｅの外周筋継手３１の両端にロックナット３３，７３を締め付ける必要はない。また、第１外周筋１１Ｅの外周筋継手３７の両端にロックナット７２，３２を締め付ける必要はない。したがって、外周筋２１Ｅ，１１Ｅは、仮固定の状態にある。先接合工程は、実質的に既述実施形態の仮固定工程に相当する。
なお、先接合工程において、第２外周筋２１Ｅの外周筋継手３１の両端にロックナット３３，７３を締め付けてもよい。また、第１外周筋１１Ｅの外周筋継手３７の両端にロックナット７２，３２を締め付けてもよい。 At this stage, it is not necessary to fasten the lock nuts 33 and 73 to both ends of the outer peripheral joint 31 of the second outer peripheral bar 21E. Further, it is not necessary to tighten the lock nuts 72 and 32 at both ends of the outer periphery joint 37 of the first outer periphery 11E. Accordingly, the outer peripheral bars 21E and 11E are temporarily fixed. The pre-joining step substantially corresponds to the temporary fixing step of the embodiment described above.
Note that, in the pre-joining step, lock nuts 33 and 73 may be fastened to both ends of the outer peripheral reinforcing joint 31 of the second outer peripheral reinforcing member 21E. In addition, the lock nuts 72 and 32 may be fastened to both ends of the outer periphery joint 37 of the first outer periphery 11E.

次に、図１５（ａ）に示すように、対応する芯筋２２，１２どうしを芯筋接合手段４０にて接合する（芯筋接合工程）。このとき、四隅以外の対応する外周筋１１，２１間が大きく空いているから、外周筋１１，２１に邪魔されることなく、芯筋１２，２２の接合作業を簡易に行うことができる。しかも、四隅の外周筋１１Ｅ，２１Ｅどうしが接合されていることで、第２鉄筋篭２０の揺れが抑制又は防止されているから、芯筋１２，２２の上記接合作業を一層容易に行うことができる。複数の外周筋１１，２１のうち四隅（一部）の外周筋１１Ｅ，２１Ｅだけを選択して中継筋７１Ｅにて先に接合（仮固定）することで、中継筋７１Ｅが、芯筋１２，２２どうしの接合作業の邪魔になるのを回避できる。 Next, as shown in FIG. 15A, the corresponding core reinforcements 22 and 12 are joined by the core reinforcement joining means 40 (core reinforcement joining step). At this time, since there is a large space between the corresponding outer peripheral bars 11 and 21 other than the four corners, the core bars 12 and 22 can be easily joined without being obstructed by the outer peripheral bars 11 and 21. Moreover, since the outer reinforcing bars 11E and 21E at the four corners are joined together, the shaking of the second rebar bar 20 is suppressed or prevented, so that the joining work of the core bars 12 and 22 can be performed more easily. it can. By selecting only the outer peripheral muscles 11E and 21E at the four corners (part) from among the outer peripheral reinforcing bars 11 and 21, and joining (temporarily fixing) them first with the relay reinforcement 71E, the relay reinforcement 71E becomes the core reinforcement 12, It is possible to avoid interfering with the joining work between the two.

次に、図１５（ｂ）に示すように、四隅以外の外周筋２１，１１どうしを、中継筋７１を介して接合する（外周筋接合工程）。具体的には、中継筋７１を、対応する外周筋２１，１１どうし間に差し入れ、第２外周筋２１と中継筋７１と第１外周筋１１を上下に一直線に並べる。続いて、第２外周筋２１の外周筋継手３１を下降方向に回して、第２外周筋２１から中継筋７１に跨らせる。そして、四隅の第２外周筋２１Ｅを含むすべての第２外周筋２１の外周筋継手３１の両端部にロックナット３３，７３を締め付ける。また、第１外周筋１１の外周筋継手３７を上昇方向に回して、第１外周筋１１から中継筋７１に跨らせる。そして、四隅の第１外周筋１１Ｅを含むすべての第１外周筋１１の外周筋継手３７の両端部にロックナット７２，３２を締め付ける。 Next, as shown in FIG. 15B, the outer peripheral bars 21 and 11 other than the four corners are bonded to each other via the relay bar 71 (outer bar connecting step). Specifically, the relay bar 71 is inserted between the corresponding outer peripheral bars 21 and 11, and the second outer bar 21, the relay bar 71, and the first outer bar 11 are aligned in a vertical line. Subsequently, the outer peripheral reinforcement 31 of the second outer periphery 21 is rotated in the descending direction so as to straddle the second outer periphery 21 to the relay reinforcement 71. Then, the lock nuts 33 and 73 are fastened to both ends of the outer peripheral joints 31 of all the second outer peripheral bars 21 including the second outer peripheral bars 21E at the four corners. Moreover, the outer periphery reinforcement joint 37 of the 1st outer periphery reinforcement | strut 11 is turned to a raise direction, and is straddled from the 1st outer periphery reinforcement | strut 11 to the relay reinforcement 71. FIG. Then, the lock nuts 72 and 32 are fastened to both ends of the outer peripheral joints 37 of all the first outer peripheral bars 11 including the first outer peripheral bars 11E at the four corners.

第５実施形態においては、本接合用の中継筋７１Ｅを用いて、外周筋１１Ｅ，２１Ｅどうしを仮固定又は先接合するものであるから、仮固定装置の撤去工程は不要である。 In the fifth embodiment, since the outer reinforcing bars 11E and 21E are temporarily fixed or pre-joined using the relay bar 71E for main bonding, the step of removing the temporary fixing device is not necessary.

本発明は、上記実施形態に限られず、その趣旨を逸脱しない範囲内で種々の改変をなすことができる。
例えば、仮固定工程（先接合工程）では、四隅の外周筋１１Ｅ，２１Ｅのすべてを仮固定（先接合）する必要はなく、四隅のうち、１つ〜３つの隅の外周筋１１Ｅ，２１Ｅどうしだけを仮固定（先接合）してもよい。さらに、仮固定（先接合）する外周筋１１，２１は、鉄筋篭１０，２０の四隅のものに限られず、鉄筋篭１０，２０の各辺の中央寄りの外周筋１０，２０どうしを仮固定（先接合）してもよい。 The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the temporary fixing step (pre-joining step), it is not necessary to temporarily fix (pre-join) all the outer corner bars 11E and 21E at the four corners, but the outer corner bars 11E and 21E at one to three corners among the four corners. Only temporary fixing (pre-joining) may be performed. Further, the outer peripheral bars 11 and 21 to be temporarily fixed (tip-joined) are not limited to the four corners of the reinforcing bar rods 10 and 20, and the outer peripheral bars 10 and 20 near the center of each side of the reinforcing bar rods 10 and 20 are temporarily fixed. (Pre-joining) may be performed.

下側の第１鉄筋篭１０の第１外周筋１１の上端部を第１芯筋１２の上端部より下に位置させることで、外周筋１１，２１どうし間の距離が芯筋１２，２２どうし間の距離より大きくなるようにしてもよい。 By positioning the upper end of the first outer periphery 11 of the lower first reinforcing bar rod 10 below the upper end of the first core 12, the distance between the outer periphery 11, 21 is between the cores 12, 22. You may make it become larger than the distance between.

仮固定工程において、仮固定装置６０の姿勢を第２〜第４実施形態とは上下逆さまにして、棒材６２を外周筋継手３１を介して第１外周筋１１と連結し、仮固定継手６１を第２外周筋２１と連結してもよい。この場合、棒材６２が「第１連結部」を構成し、仮固定継手６１が「第２連結部」を構成する。また、この場合、前工程において、外周筋継手３１を第１外周筋１１の上端部に取り付けておくことが好ましい。
仮固定装置は、必ずしもネジ部材６１，６２である必要は無い。例えば、仮固定装置の第１連結部が、第１外周筋１１を解放可能に把持する第１クランプであってもよい。第２連結部が、第２外周筋２１を解放可能に把持する第２クランプであってもよい。さらに、仮固定装置が、軸線を上下に向けた棒状の本体を有し、前記本体の下端部に前記第１クランプが設けられ、前記本体の上端部に前記第２クランプが設けられていてもよい。 In the temporary fixing step, the position of the temporary fixing device 60 is turned upside down from that of the second to fourth embodiments, the bar 62 is connected to the first outer peripheral reinforcement 11 via the outer peripheral reinforcing joint 31, and the temporary fixing joint 61 is connected. May be connected to the second outer periphery 21. In this case, the bar 62 constitutes the “first connecting portion”, and the temporarily fixed joint 61 constitutes the “second connecting portion”. In this case, it is preferable that the outer peripheral reinforcing joint 31 is attached to the upper end portion of the first outer peripheral reinforcing rod 11 in the previous step.
The temporary fixing device does not necessarily need to be the screw members 61 and 62. For example, the 1st connection part of a temporarily fixing apparatus may be the 1st clamp which hold | grips the 1st outer periphery muscle 11 releasably. The 2nd connection part may be the 2nd clamp which grasps the 2nd perimeter muscle 21 releasably. Furthermore, even if the temporary fixing device has a rod-shaped main body with the axis line directed up and down, the first clamp is provided at the lower end portion of the main body, and the second clamp is provided at the upper end portion of the main body. Good.

本発明は、建築・土木構造物の構築に適用可能である。 The present invention is applicable to construction of a building / civil engineering structure.

１柱
２鉄筋篭建込体
３クレーンの吊りロープ
１０第１鉄筋篭
１１第１外周筋
１１Ｅ四隅の（選択された）第１外周筋
１１ａ雄ネジ山
１１ｂ平坦部
１２第１芯筋
１２ａ雄ネジ山
１２ｂ平坦部
１３第１剪断補強筋
２０第２鉄筋篭
２１第２外周筋
２１Ｅ四隅の（選択された）第２外周筋
２１ａ雄ネジ山
２１ｂ平坦部
２２第２芯筋
２２ａ雄ネジ山
２２ｂ平坦部
２３第２剪断補強筋
２３Ｃ中子筋
２６補助フープ筋
３０外周筋接合手段
３１外周筋継手
３１ａ雌ネジ山
３１ｃグラウト孔
３２下ロックナット
３３上ロックナット
３７外周筋継手
４０芯筋接合手段
４１芯筋継手
４１ａ雌ネジ山
４１ｃグラウト孔
４２下ロックナット
４３上ロックナット
５０吊り治具
５１挿通孔
５２ナット（ストッパ）
５３クランプ
５４引掛部材
５５挿通孔
５６引掛棒
６０仮固定装置
６１仮固定継手（第１連結部）
６１ａ雌ネジ山
６２棒材（第２連結部）
６２ａ雄ネジ山
６２ｂ平坦部
７１中継筋
７１Ｅ選択した中継ぎ筋 DESCRIPTION OF SYMBOLS 1 Pillar 2 Reinforcement rod built-in body 3 Crane suspension rope 10 1st reinforcement rod 11 1st outer periphery 11E Four corners (selected) 1st outer periphery 11a Male thread 11b Flat part 12 1st core 12a Male thread Mountain 12b Flat portion 13 First shear reinforcing bar 20 Second rebar bar 21 Second outer circumferential bar 21E Four (selected) second outer circumferential bars 21a Male thread 21b Flat part 22 Second core bar 22a Male thread 22b Flat Part 23 Second shear reinforcement bar 23C Core bar 26 Auxiliary hoop bar 30 Outer bar joint means 31 Outer bar joint 31a Female thread 31c Grout hole 32 Lower lock nut 33 Upper lock nut 37 Outer bar joint 40 Core bar joint means 41 Core Muscle joint 41a Female thread 41c Grout hole 42 Lower lock nut 43 Upper lock nut 50 Lifting jig 51 Insertion hole 52 Nut (stopper)
53 Clamp 54 Hooking member 55 Insertion hole 56 Hooking rod 60 Temporary fixing device 61 Temporary fixing joint (first connecting portion)
61a Female thread 62 Bar material (second connecting part)
62a Male thread 62b Flat portion 71 Relay bar 71E Selected joint bar

Claims

鉄筋コンクリート構造物の柱を構築する際に、建て込み済みの第１鉄筋篭の上方に第２鉄筋篭を建て込む鉄筋篭建込方法であって、
前記第１鉄筋篭の周方向に互いに離れて配置された複数の第１外周筋と、前記第２鉄筋篭の周方向に互いに離れて配置された複数の第２外周筋とにおける、互いに対応するものどうし間の距離を、前記第１鉄筋篭の前記第１外周筋より内側の第１芯筋と前記第２鉄筋篭の前記第２外周筋より内側の第２芯筋との間の距離より大きくした状態で、前記第２鉄筋篭を前記第１鉄筋篭の上方に吊り下げ、
次に、前記第１、第２芯筋どうしを芯筋接合手段を介して接合し、
その後、前記対応する第１、第２外周筋どうしを外周筋接合手段を介して接合し、
しかも、前記複数の第１、第２外周筋から選択した一部の互いに対応する第１、第２外周筋どうしを仮固定したうえで、前記第１、第２芯筋どうしの接合を行ない、
しかも、前記選択した第１、第２外周筋どうしを仮固定装置にて仮固定したうえで、前記第１、第２芯筋どうしの接合を行ない、その後、前記仮固定装置を撤去したうえで、前記第１、第２外周筋どうしの接合を行なうことを特徴とする鉄筋篭建込方法。 When building a column of a reinforced concrete structure, a reinforcing bar construction method in which a second reinforcing bar is built above the built-up first reinforcing bar,
The plurality of first outer circumferential bars arranged away from each other in the circumferential direction of the first reinforcing bar rod and the plurality of second outer circumferential bars arranged away from each other in the circumferential direction of the second reinforcing bar rod correspond to each other. The distance between the objects is determined based on the distance between the first core reinforcement inside the first outer periphery of the first reinforcing bar and the second core reinforcement inside the second outer periphery of the second reinforcing bar. In the enlarged state, the second rebar rod is suspended above the first rebar rod,
Next, the first and second core reinforcements are joined together through the core reinforcement joining means,
Thereafter, the corresponding first and second outer peripheral muscles are joined to each other via the outer circumference muscle joining means ,
Moreover, after temporarily fixing a part of the first and second outer peripheral bars corresponding to each other selected from the plurality of first and second outer peripheral bars, the first and second core bars are joined to each other.
In addition, the first and second outer peripheral reinforcing bars selected are temporarily fixed with a temporary fixing device, the first and second core reinforcing bars are joined, and then the temporary fixing device is removed. A method for laying a reinforcing bar rod , comprising joining the first and second outer peripheral bars.

前記第１、第２外周筋の外周に雄ネジ山が形成されており、前記外周筋接合手段が、内周に雌メジ山を有する筒状の外周筋継手を含み、
前記仮固定装置として、内周に雌ネジ山を有する筒状の仮固定継手と、外周に雄ネジ山を有する棒材とを用意し、
前記仮固定時には、前記選択した第１、第２外周筋の一方と、前記仮固定継手と、前記棒材と、前記外周筋継手と、前記選択した第１、第２外周筋の他方とを、一列に連なるようにネジ結合し、前記第１、第２芯筋どうしの連結後、前記仮固定継手と前記一方の外周筋とのネジ結合を解除し、かつ前記外周筋継手と前記棒材とのネジ結合を解除することを特徴とする請求項１に記載の鉄筋篭建込方法。 Male thread is formed on the outer circumference of the first and second outer muscles, and the outer circumference joint means includes a cylindrical outer muscle joint having a female thread on the inner circumference,
As the temporary fixing device, a cylindrical temporary fixing joint having an internal thread on the inner periphery and a bar member having an external thread on the outer periphery are prepared,
At the time of the temporary fixing, one of the selected first and second outer peripheral bars, the temporary fixing joint, the bar, the outer peripheral bar joint, and the other of the selected first and second outer peripheral bars. The screw connection between the first and second core bars is released, the screw connection between the temporary fixed joint and the one outer peripheral bar is released, and the outer bar joint and the bar are connected. The method of building a reinforcing bar rod according to claim 1 , wherein the screw connection is released.

前記第１、第２鉄筋篭がそれぞれ平面視で四角形状をなしており、前記第１、第２鉄筋篭の四隅のうち何れかの１の隅の第１、第２外周筋を選択して、前記仮固定を行なうことを特徴とする請求項１又は２に記載の鉄筋篭建込方法。 Each of the first and second reinforcing bar rods has a quadrangular shape in plan view, and the first and second outer circumferential bars at one of the four corners of the first and second reinforcing bar rods are selected. The method of building a reinforcing bar rod according to claim 1, wherein the temporary fixing is performed.

前記仮固定装置が、前記第１外周筋に着脱可能な第１連結部と、前記第２外周筋に着脱可能な第２連結部とを含み、The temporary fixing device includes a first connecting part that is attachable to and detachable from the first outer periphery and a second connecting part that is attachable to and detachable from the second outer periphery.
前記第１、第２連結部の一方が、内周に雌ネジ山を有する筒状の仮固定継手であり、前記第１、第２連結部の他方が、外周に雄ネジ山を有して前記仮固定継手とネジ結合される棒材であり、前記雌ネジ山と前記雄ネジ山との間には、軸方向に数ｍｍの余裕が設けられていることを特徴とする請求項１〜３の何れか１項に記載の鉄筋篭建込方法。 One of the first and second connecting portions is a cylindrical temporary fixed joint having an internal thread on the inner periphery, and the other of the first and second connecting portions has an external thread on the outer periphery. It is a bar member screw-coupled to the temporary fixing joint, and a margin of several millimeters is provided in the axial direction between the female screw thread and the male screw thread. 4. The reinforcing bar erection method according to any one of items 3.