JP5031637B2 - Column base structure - Google Patents

Column base structure Download PDF

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JP5031637B2
JP5031637B2 JP2008086442A JP2008086442A JP5031637B2 JP 5031637 B2 JP5031637 B2 JP 5031637B2 JP 2008086442 A JP2008086442 A JP 2008086442A JP 2008086442 A JP2008086442 A JP 2008086442A JP 5031637 B2 JP5031637 B2 JP 5031637B2
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base structure
column base
main reinforcing
reinforcing bar
connecting member
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JP2009235871A (en
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倫夫 伊藤
秀治 青柳
建蔵 中野
秀宣 田中
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Senqcia Corp
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Description

本発明は、建築構造物における基礎コンクリート中に埋め込まれた鉄骨柱の下端部が、基礎コンクリート中の主鉄筋と、仲介連結部材を介して連結される柱脚構造に関するものである。   The present invention relates to a column base structure in which a lower end portion of a steel column embedded in a foundation concrete in a building structure is connected to a main reinforcing bar in the foundation concrete via an intermediate connection member.

従来の柱脚構造としては、例えば、特許文献1に記載されたような、板状であって、その内側(中央側)に形成される開口部に建築構造物の鉄骨柱の下端部が嵌合して、その鉄骨柱の下端部に固定される仲介連結部材を備えており、この仲介連結部材に主鉄筋が連結されることにより、この仲介連結部材を介して、鉄骨柱の下端部に主鉄筋が連結されるようになっている柱脚構造があった。
特許第4033340号公報
As a conventional column base structure, for example, as described in Patent Document 1, it is plate-shaped, and a lower end portion of a steel column of a building structure is fitted into an opening formed inside (center side) thereof. In addition, an intermediate connecting member fixed to the lower end portion of the steel column is provided, and when the main reinforcing bar is connected to the intermediate connecting member, the intermediate column is connected to the lower end portion of the steel column via the intermediate connecting member. There was a column base structure in which main reinforcing bars were connected.
Japanese Patent No. 4033340

しかしながら、上記従来の柱脚構造においては、その仲介連結部材に主鉄筋の端部が確実に連結されるようにするために、仲介連結部材が、主鉄筋の伸びる水平方向に寸法を長く確保する必要があったので、仲介連結部材が全体として水平方向に広がって大型化してしまうという問題があった。   However, in the conventional column base structure, in order to ensure that the end of the main reinforcing bar is connected to the intermediate connecting member, the intermediate connecting member ensures a long dimension in the horizontal direction in which the main reinforcing bar extends. Since there was a necessity, there existed a problem that a mediation connection member spreads in the horizontal direction as a whole, and enlarges.

また、上記従来の柱脚構造においては、その仲介連結部材に主鉄筋の端部を連結する作業が容易ではないという問題があった。   Moreover, in the said conventional column base structure, there existed a problem that the operation | work which connects the edge part of a main reinforcement to the mediation connection member was not easy.

そこで本発明は、上記問題点に鑑みて、仲介連結部材を小型化することができると共に、この仲介連結部材と主鉄筋の端部との連結作業を容易にすることができる柱脚構造を提供することを課題とするものである。   Therefore, in view of the above problems, the present invention provides a column base structure that can reduce the size of the intermediate connection member and facilitate the connection between the intermediate connection member and the end of the main reinforcing bar. It is an object to do.

上記課題を解決するために本発明は、
建築構造物における鉄骨柱に設置した仲介連結部材によって、基礎コンクリート中において前記鉄骨柱と主鉄筋とが連結される柱脚構造であって、前記仲介連結部材には上下方向に貫通する掛止用孔が形成され、前記主鉄筋の端部に設けた折り曲げ部を前記掛止用孔に挿し込んで掛止することを特徴とするものである。
In order to solve the above problems, the present invention
It is a column base structure in which the steel column and the main reinforcing bar are connected in foundation concrete by an intermediate connecting member installed on a steel column in a building structure, and the intermediate connecting member is used for latching that penetrates in the vertical direction. A hole is formed, and a bent portion provided at an end of the main reinforcing bar is inserted into the hooking hole to be hooked.

また、本発明による柱脚構造は、
前記鉄骨柱は、前記仲介連結部材に形成された開口部に嵌合されていることを特徴とするものである。
The column base structure according to the present invention is
The steel column is fitted in an opening formed in the mediating connecting member.

また、本発明による柱脚構造は、
前記鉄骨柱は、前記仲介連結部材の上面部に設置されていることを特徴とするものである。
The column base structure according to the present invention is
The steel column is installed on an upper surface portion of the mediation connecting member.

また、本発明による柱脚構造は、
前記掛止用孔の内周面が、挿し込まれる主鉄筋の形状に合うように拡径していることを特徴とするものである。
The column base structure according to the present invention is
The diameter of the inner peripheral surface of the hooking hole is increased to match the shape of the main reinforcing bar to be inserted.

また、本発明による柱脚構造は、
前記鉄骨柱の高さ方向に前記仲介連結部材が複数設置され、上下方向に隣り合う仲介連結部材の掛止用孔同士が、上下方向に重ならないように水平方向にずれて形成されていることを特徴とするものである。
The column base structure according to the present invention is
A plurality of the intermediate connection members are installed in the height direction of the steel column, and the latching holes of the intermediate connection members adjacent in the vertical direction are formed so as to be shifted in the horizontal direction so as not to overlap in the vertical direction. It is characterized by.

また、本発明による柱脚構造は、
前記仲介連結部材は、前記掛止用孔を有する掛止部と、掛止部を設置する本体部とで形成されていることを特徴とするものである。
The column base structure according to the present invention is
The mediation connecting member is formed by a latching portion having the latching hole and a main body portion on which the latching portion is installed.

また、本発明の柱脚構造は、
前記主鉄筋の折り曲げ部に、主鉄筋の折り曲げ部が掛止用孔から抜けるのを防止する抜け止め部が設けられていることを特徴とするものである。
The column base structure of the present invention is
The main reinforcing bar bent portion is provided with a retaining portion for preventing the bent portion of the main reinforcing bar from coming off from the hooking hole.

また、本発明の柱脚構造は、
前記主鉄筋の折り曲げ部を前記掛止用孔に掛止した状態において、前記掛止用孔にはコンクリート等のグラウト材が充填できる程度の間隙を有していることを特徴とするものである。
The column base structure of the present invention is
In the state where the bent portion of the main reinforcing bar is hooked in the hooking hole, the hooking hole has a gap enough to be filled with a grout material such as concrete. .

このような本発明の柱脚構造によれば、
建築構造物における鉄骨柱に設置した仲介連結部材によって、基礎コンクリート中において前記鉄骨柱と主鉄筋とが連結される柱脚構造であって、前記仲介連結部材には上下方向に貫通する掛止用孔が形成され、前記主鉄筋の端部に設けた折り曲げ部を前記掛止用孔に挿し込んで掛止することにより、
仲介連結部材を小型化することができると共に、この仲介連結部材と主鉄筋の端部との連結作業を容易にすることができる。
According to such a column base structure of the present invention,
It is a column base structure in which the steel column and the main reinforcing bar are connected in foundation concrete by an intermediate connecting member installed on a steel column in a building structure, and the intermediate connecting member is used for latching that penetrates in the vertical direction. A hole is formed, and a bent portion provided at the end of the main reinforcing bar is inserted into the hooking hole and hooked,
The mediation connection member can be reduced in size, and the connection operation between the mediation connection member and the end of the main reinforcing bar can be facilitated.

また、本発明の柱脚構造によれば、
前記鉄骨柱は、前記仲介連結部材に形成された開口部に嵌合されていることにより、
前記仲介連結部材の軽量化を図ることができる。
Moreover, according to the column base structure of the present invention,
The steel column is fitted into an opening formed in the mediating connecting member,
The intermediate connecting member can be reduced in weight.

また、本発明の柱脚構造によれば、
前記鉄骨柱は、前記仲介連結部材の上面部に設置されていることにより、
前記仲介連結部材に開口部を形成しなくとも済むので、その加工費を低減させることができる。
Moreover, according to the column base structure of the present invention,
The steel column is installed on the upper surface of the mediation connecting member,
Since it is not necessary to form an opening in the mediation connecting member, the processing cost can be reduced.

また、本発明の柱脚構造によれば、
前記掛止用孔の内周面が、挿し込まれる主鉄筋の形状に合うように拡径していることにより、
上記掛止用孔に主鉄筋の折り曲げ部が円滑に掛止されるようにすることができる。
Moreover, according to the column base structure of the present invention,
By expanding the inner peripheral surface of the hooking hole to match the shape of the main reinforcing bar to be inserted,
The bent portion of the main reinforcing bar can be smoothly hooked in the hooking hole.

また、本発明の柱脚構造によれば、
前記鉄骨柱の高さ方向に前記仲介連結部材が複数設置され、上下方向に隣り合う仲介連結部材の掛止用孔同士が、上下方向に重ならないように水平方向にずれて形成されていることにより、
上記仲介連結部材のうち下側に配置されるものについて、その掛止用孔に主鉄筋の折り曲げ部を掛止する作業を容易にすることができる。
Moreover, according to the column base structure of the present invention,
A plurality of the intermediate connection members are installed in the height direction of the steel column, and the latching holes of the intermediate connection members adjacent in the vertical direction are formed so as to be shifted in the horizontal direction so as not to overlap in the vertical direction. By
About the thing arrange | positioned below among the said mediation connection members, the operation | work which latches the bending part of a main reinforcing bar in the hole for latching can be made easy.

また、本発明の柱脚構造によれば、
前記仲介連結部材は、前記掛止用孔を有する掛止部と、掛止部を設置する本体部とで形成されていることにより、
主鉄筋の本数を減らしたり無くしたりする場合、或は主鉄筋の位置を変更したり調整したりする場合等、現場の状況に容易に対応することができる。
Moreover, according to the column base structure of the present invention,
The intermediary connecting member is formed by a latching portion having the latching hole and a main body portion where the latching portion is installed.
When reducing or eliminating the number of main reinforcing bars, or when changing or adjusting the position of the main reinforcing bars, it is possible to easily cope with the situation at the site.

また、本発明の柱脚構造によれば、
前記主鉄筋の折り曲げ部に、主鉄筋の折り曲げ部が掛止用孔から抜けるのを防止する抜け止め部が設けられていることにより、
基礎コンクリートの充填作業中などに、上記掛止用孔から主鉄筋の折り曲げ部が上方に抜けて外れてしまうことを防止することができる。
Moreover, according to the column base structure of the present invention,
By providing a retaining portion for preventing the bent portion of the main reinforcing bar from coming out of the hooking hole in the bent portion of the main reinforcing bar,
It is possible to prevent the bent portion of the main reinforcing bar from coming off upward and coming off from the hooking hole during the filling operation of the basic concrete.

また、本発明の柱脚構造によれば、
前記主鉄筋の折り曲げ部を前記掛止用孔に掛止した状態において、前記掛止用孔にはコンクリート等のグラウト材が充填できる程度の間隙を有していることにより、
基礎コンクリートの充填作業中などに主鉄筋の周囲にコンクリート等のグラウト材を充填することができるので、グラウト材により前記掛止用孔への前記主鉄筋の折り曲げ部の掛止状態を確実に保持することができる。
Moreover, according to the column base structure of the present invention,
In the state where the bent portion of the main reinforcing bar is hooked in the hooking hole, the hooking hole has a gap that can be filled with a grout material such as concrete,
Since grout material such as concrete can be filled around the main rebar during filling of the basic concrete, etc., the state where the bent portion of the main rebar is latched to the retaining hole is securely held by the grout material. can do.

以下、本発明に係る柱脚構造を実施するための最良の形態について、図面に基づいて具体的に説明する。
図1から図3は、本発明の第1の実施の形態に係る柱脚構造2について説明するために参照する図である。
Hereinafter, the best mode for carrying out the column base structure according to the present invention will be specifically described with reference to the drawings.
FIGS. 1 to 3 are views referred to for explaining the column base structure 2 according to the first embodiment of the present invention.

本実施の形態に係る柱脚構造2は、図1及び図2に示すように、鉄骨柱4の基礎コンクリート6中に埋め込まれる下端部4aと、基礎コンクリート6中に埋め込まれる主鉄筋12とが、仲介連結部材8を介して連結されている。   As shown in FIGS. 1 and 2, the column base structure 2 according to the present embodiment includes a lower end portion 4 a embedded in the foundation concrete 6 of the steel column 4 and a main reinforcing bar 12 embedded in the foundation concrete 6. And are connected via an intermediate connecting member 8.

柱脚構造2の鉄骨柱4の下端部4aには、その高さ方向の上下方向に離れて配置される2つの仲介連結部材8が固定されている。つまり、仲介連結部材8の内側には、開口部8aが形成されていることにより、この開口部8aに鉄骨柱4の下端部4aが嵌合し、図1に示すように、この鉄骨柱4に仲介連結部材8が溶接により固定されている。   Two intermediary connecting members 8 are fixed to the lower end portion 4a of the steel column 4 of the column base structure 2 so as to be separated in the vertical direction in the height direction. That is, since the opening 8a is formed inside the intermediate connecting member 8, the lower end 4a of the steel column 4 is fitted into the opening 8a, and as shown in FIG. The intermediate connecting member 8 is fixed by welding.

このような柱脚構造2においては、図2に示すように、その鉄骨柱4を中心として、水平面上における90°間隔の4方向のうちの、図中下方向及び左右両方向の3方向のそれぞれに伸びるように主鉄筋12が配置され、かつ、各方向毎に複数の主鉄筋12が配置されている。すなわち、各方向毎の複数の主鉄筋12は、図2に示すように、4本ずつ配置されている。   In such a column base structure 2, as shown in FIG. 2, each of the three directions of the lower direction and the left and right directions in the four directions at 90 ° intervals on the horizontal plane centering on the steel column 4. The main reinforcing bars 12 are arranged so as to extend in the direction and a plurality of main reinforcing bars 12 are arranged in each direction. That is, the plurality of main reinforcing bars 12 in each direction are arranged four by four as shown in FIG.

また、仲介連結部材8における、主鉄筋12が連結されている3辺部分の各辺部(外周部)には、上下方向に貫通する掛止用孔10が4つずつ形成されている。この掛止用孔10のそれぞれには、図1に示すように、複数の主鉄筋12のそれぞれの端部を下方に折り曲げて形成した折り曲げ部12aが上方から挿し込まれて掛止されている。   In addition, four hooking holes 10 penetrating in the vertical direction are formed in each side portion (outer peripheral portion) of the three side portions to which the main reinforcing bars 12 are connected in the mediation connecting member 8. As shown in FIG. 1, bent portions 12a formed by bending the respective end portions of the plurality of main reinforcing bars 12 downward are inserted into the hook holes 10 for hooking from above. .

また、仲介連結部材8の掛止用孔10の内周面は、図3に示すように、鉄骨柱4とは反対側(外側)の内周面が、上側に向かうに従って鉄骨柱4から離れて拡がっていくように形成されている。このため、掛止用孔10に主鉄筋12の折り曲げ部12aが円滑に掛止されるようにすることができる。   Further, as shown in FIG. 3, the inner peripheral surface of the latching hole 10 of the intermediate connecting member 8 is separated from the steel column 4 as the inner peripheral surface on the opposite side (outer side) from the steel column 4 is directed upward. It is formed to expand. For this reason, the bent part 12a of the main rebar 12 can be smoothly hooked in the hooking hole 10.

掛止用孔10は、このようにして主鉄筋12の折り曲げ部12aが掛止した状態において、主鉄筋12の周囲に、少なくとも、コンクリート等のグラウト材を充填することができる程度の大きさに形成されている。   The hooking hole 10 has such a size that at least the grout material such as concrete can be filled around the main reinforcing bar 12 when the bent portion 12a of the main reinforcing bar 12 is hooked. Is formed.

このような本実施の形態に係る柱脚構造2によれば、その仲介連結部材8の掛止用孔10に対して主鉄筋12の折り曲げ部12aを上方から挿し込むだけで、この主鉄筋12を掛止することができるので、従来のように、仲介連結部材8に主鉄筋12の端部が確実に連結されるようにするために、仲介連結部材8が、主鉄筋12の伸びる水平方向に寸法を長く確保する必要がなくなるので、仲介連結部材8が全体として水平方向に広がって大型化するのを防止して、仲介連結部材8を小型化することができる。   According to the column base structure 2 according to the present embodiment, the main reinforcing bar 12 is simply inserted into the hooking hole 10 of the intermediate connecting member 8 by inserting the bent portion 12a of the main reinforcing bar 12 from above. In order to ensure that the end of the main reinforcing bar 12 is securely connected to the intermediate connecting member 8 as in the prior art, the intermediate connecting member 8 is provided in the horizontal direction in which the main reinforcing bar 12 extends. Therefore, it is possible to prevent the intermediate connecting member 8 from spreading and expanding in the horizontal direction as a whole, and to reduce the intermediate connecting member 8 in size.

また、本実施の形態に係る柱脚構造2によれば、その仲介連結部材8の掛止用孔10に対して主鉄筋12の折り曲げ部12aを上方から挿し込むだけで、この主鉄筋12を掛止用孔10に掛止することができるので、仲介連結部材8と主鉄筋12の端部との連結作業を容易にすることができる。   Further, according to the column base structure 2 according to the present embodiment, the main reinforcing bar 12 is simply inserted into the hooking hole 10 of the intermediate connecting member 8 by inserting the bent portion 12a of the main reinforcing bar 12 from above. Since it can be latched in the latching hole 10, the connection work between the intermediate coupling member 8 and the end of the main reinforcing bar 12 can be facilitated.

また、本実施の形態に係る柱脚構造2によれば、掛止用孔10が、主鉄筋12の折り曲げ部12aが掛止した状態において、主鉄筋12の周囲に少なくともコンクリート等のグラウト材を充填することができる程度の大きさに形成されていることにより、基礎コンクリートの充填作業中などに主鉄筋12の周囲にコンクリート等のグラウト材を充填することができるので、そのグラウト材により掛止用孔10への主鉄筋12の折り曲げ部12aの掛止状態を確実に保持することができる。   Further, according to the column base structure 2 according to the present embodiment, in the state where the hooking hole 10 is hooked by the bent portion 12a of the main reinforcing bar 12, at least a grout material such as concrete is provided around the main reinforcing bar 12. Since it is formed in a size that can be filled, grout material such as concrete can be filled around the main rebar 12 during filling of the basic concrete, etc. The state where the bent portion 12a of the main reinforcing bar 12 is hooked to the hole 10 can be reliably held.

次に、図4から図7を参照して、本発明の第2の実施の形態に係る柱脚構造20について説明する。前記第1の実施の形態に係る柱脚構造2と同様の部分には同じ符号を用いて説明し、同様の構成についての重複する説明は省略するものとする。   Next, with reference to FIGS. 4 to 7, a column base structure 20 according to a second embodiment of the present invention will be described. The same parts as those of the column base structure 2 according to the first embodiment will be described using the same reference numerals, and overlapping descriptions of the same configurations will be omitted.

本実施の形態に係る柱脚構造20は、前記第1の実施の形態に係る柱脚構造2で使用した上下2枚の仲介連結部材8のうち、例えば、上段に配置された1枚の仲介連結部材8の代わりに、2枚の仲介連結部材を重ねて配置したものである。すなわち、図4に示すように、第2の実施の形態に係る柱脚構造20は、上側に仲介連結部材22を、下側に仲介連結部材24をそれぞれ配置して、2枚の仲介連結部材を重ねた形態を採用している。   The column base structure 20 according to the present embodiment includes, for example, one sheet of mediation arranged in the upper stage among the two intermediate connection members 8 used in the column base structure 2 according to the first embodiment. Instead of the connecting member 8, two intermediate connecting members are stacked. That is, as shown in FIG. 4, in the column base structure 20 according to the second embodiment, the intermediate connection member 22 is disposed on the upper side, and the intermediate connection member 24 is disposed on the lower side. The form which piled up is adopted.

これは、例えば上段に配筋される主鉄筋の本数が多く、1枚の仲介連結部材では全ての主鉄筋を連結することができない場合に、2枚の仲介連結部材を重ねて配置することによって、多くの本数の主鉄筋を連結することができるようにしたものである。   This is because, for example, when the number of main reinforcing bars arranged in the upper stage is large and all the main reinforcing bars cannot be connected with one intermediate connecting member, the two intermediate connecting members are arranged in an overlapping manner. A large number of main reinforcing bars can be connected.

なお、2枚の仲介連結部材を重ねて配置する形態は、前記第1の実施の形態に係る柱脚構造2の下段の仲介連結部材8のみの代わりに、あるいは上段と下段の仲介連結部材8の双方の代わりに、ともに採用することもできる。   In addition, the form which arranges two intermediate | middle intermediate | middle connection members in piles replaces only the lower intermediate | middle connection member 8 of the column base structure 2 which concerns on the said 1st Embodiment, or the intermediate | middle connection member 8 of an upper stage and a lower stage. It is also possible to employ both instead of both.

本実施の形態に係る柱脚構造20は、図4及び図5に示すように、複数の主鉄筋12が、鉄骨柱4を中心に、水平面上の4方向に伸びるように配置されている。   As shown in FIGS. 4 and 5, the column base structure 20 according to the present embodiment is arranged such that a plurality of main reinforcing bars 12 extend in four directions on the horizontal plane with the steel column 4 as the center.

鉄骨柱4を中心とする4方向の各方向毎に、互に平行に配置される7本の主鉄筋12は、図5に示すように、上方から垂直に見下ろすと、これら7本の主鉄筋12が等間隔に配置されているように見えるが、これら7本のうちの、最も外側の2本を含んで1本置きに配置される4本の主鉄筋12が、図4及び図6に示すように、上側の仲介連結部材22に連結されている。   As shown in FIG. 5, the seven main reinforcing bars 12 arranged in parallel with each other in the four directions centered on the steel column 4, when viewed vertically from above, the seven main reinforcing bars. 4 appear to be arranged at equal intervals. Of these seven, four main reinforcing bars 12 arranged at intervals, including the outermost two, are shown in FIGS. As shown, the upper intermediate connecting member 22 is connected.

ここで、図6中において図示されている図形は、図4中のB−B線矢視図であって、図4中のC−C線矢視図として示される後述の図7に示される図形を省略した状態の図を示している。   Here, the figure illustrated in FIG. 6 is a view taken along the line B-B in FIG. 4, and is shown in FIG. 7 described later shown as a view taken along the line C-C in FIG. 4. The figure of the state which abbreviate | omitted the figure is shown.

したがって、図5において、各方向ごとに互に平行に配置される7本の主鉄筋12のうちの、上側の仲介連結部材22に連結されている4本以外の他の3本は、図4及び図7に示すように、下側の仲介連結部材24に連結されているので、図4に示すように、各方向ごとの上側の4本の主鉄筋12は、仲介連結部材22に連結し、下側の3本の主鉄筋12は、仲介連結部材24に連結している。   Accordingly, in FIG. 5, three of the seven main reinforcing bars 12 arranged in parallel with each other in each direction other than the four connected to the upper intermediate connecting member 22 are shown in FIG. 4. As shown in FIG. 7, the upper four main reinforcing bars 12 in each direction are connected to the intermediate connecting member 22 because they are connected to the lower intermediate connecting member 24 as shown in FIG. 7. The lower three main reinforcing bars 12 are connected to the intermediate connecting member 24.

上側の仲介連結部材22は、図4及び図6に示すように、板状であって、その平面形状が略正方形である本体部26と、この本体部26の四辺部のそれぞれに、4つずつ等間隔に配置される、計16個の掛止部28とを備えて構成されている。   As shown in FIGS. 4 and 6, the upper intermediate connecting member 22 has a plate shape, and has four main body portions 26 each having a substantially square planar shape and four side portions of the main body portion 26. A total of 16 latching portions 28 are arranged at equal intervals each time.

仲介連結部材22の本体部26は、その四辺部のそれぞれが、鉄骨柱4を中心とする4方向の各方向ごとの4本の主鉄筋12が伸びる方向と直角かつ水平方向に配置されている。また、本体部26の中央部には、鉄骨柱4が嵌合する開口部26aが形成されている。   Each of the four sides of the main body portion 26 of the mediation connecting member 22 is disposed in a horizontal direction perpendicular to the direction in which the four main reinforcing bars 12 extend in each of the four directions around the steel column 4. . Further, an opening 26 a into which the steel column 4 is fitted is formed at the center of the main body 26.

仲介連結部材22の掛止部28のそれぞれは、本体部26に溶接により固定されて一体化されている。また、掛止部28のそれぞれには、その上下方向に貫通し、主鉄筋12の折り曲げ部12aが掛止される掛止用孔28aが、1つずつ形成されている。掛止用孔28aの内周面は、図4に示すように、鉄骨柱4とは反対側(外側)の内周面が、上側に向かうに従って鉄骨柱4から離れて拡がっていくように形成されている。   Each of the latching portions 28 of the mediation connecting member 22 is fixed to and integrated with the main body portion 26 by welding. Each of the latching portions 28 is formed with one latching hole 28a penetrating in the vertical direction and latching the bent portion 12a of the main rebar 12. As shown in FIG. 4, the inner peripheral surface of the latching hole 28 a is formed so that the inner peripheral surface opposite to the steel column 4 (outer side) expands away from the steel column 4 toward the upper side. Has been.

仲介連結部材24は、図4及び図7に示すように、本体部26と掛止部28とを備え、仲介連結部材22とほぼ同様に構成されているが、上記した仲介連結部材22が掛止部28を計16個備えているのに対して、仲介連結部材24は、掛止部28の個数が計12個であって、本体部26の四辺部のそれぞれに、3個ずつ備えている点で異なっている。   As shown in FIGS. 4 and 7, the mediation connecting member 24 includes a main body portion 26 and a latching portion 28, and is configured in substantially the same manner as the mediation connecting member 22. Whereas a total of 16 stop portions 28 are provided, the intermediate connecting member 24 has a total of 12 stop portions 28 and 3 on each of the four sides of the main body portion 26. Is different.

また、仲介連結部材24の掛止部28のそれぞれは、本体部26の四辺部のそれぞれの長さ方向において、仲介連結部材22の本体部26の四辺部のそれぞれに設けられた掛止部28と交互にずれて配置されている。   Each of the latching portions 28 of the mediation connecting member 24 is provided on each of the four sides of the main body portion 26 of the mediation connecting member 22 in the length direction of each of the four sides of the main body portion 26. And are alternately displaced.

したがって、柱脚構造20は、図5に示すように、4方向の各方向ごとに平行に配置される7本の主鉄筋12のうち、図6に示すその上側の仲介連結部材22の4本と、図7に示す下側の仲介連結部材24の3本とが、それぞれの本体部26の四辺部のそれぞれの長さ方向に、交互にずれて配置されるようになっている。   Therefore, as shown in FIG. 5, the column base structure 20 includes four main connecting members 22 shown in FIG. 6 among the seven main reinforcing bars 12 arranged in parallel in each of the four directions. 7 and the three intermediate connecting members 24 on the lower side shown in FIG. 7 are arranged so as to be alternately shifted in the respective length directions of the four sides of each main body 26.

このような本実施の形態に係る柱脚構造20によれば、その仲介連結部材22,24の掛止部28の掛止用孔28aに対して主鉄筋12の折り曲げ部12aを上方から挿し込むだけで、この主鉄筋12を掛止用孔28aに掛止することができるので、従来のように、仲介連結部材22,24に主鉄筋12の端部が確実に連結されるようにするために、仲介連結部材22,24が、主鉄筋12の伸びる水平方向に寸法を長く確保する必要がなくなるので、仲介連結部材22,24が全体として水平方向に広がって大型化するのを防止して、仲介連結部材22,24を小型化することができる。   According to the column base structure 20 according to the present embodiment as described above, the bent portion 12a of the main reinforcing bar 12 is inserted from above into the hooking hole 28a of the hooking portion 28 of the intermediate connecting members 22 and 24. Since the main rebar 12 can be hooked in the hooking hole 28a, the end of the main rebar 12 can be securely connected to the intermediate connecting members 22 and 24 as in the prior art. In addition, since the intermediate connecting members 22 and 24 do not need to ensure a long dimension in the horizontal direction in which the main reinforcing bar 12 extends, it is possible to prevent the intermediate connecting members 22 and 24 from expanding in the horizontal direction and increasing in size. The intermediate connecting members 22 and 24 can be reduced in size.

また、本実施の形態に係る柱脚構造20によれば、その仲介連結部材22,24の掛止部28の掛止用孔28aに対して主鉄筋12の折り曲げ部12aを上方から挿し込むだけで、この主鉄筋12を掛止用孔28aに掛止することができるので、仲介連結部材22,24と主鉄筋12との連結作業を容易にすることができる。   Moreover, according to the column base structure 20 which concerns on this Embodiment, it only inserts the bending part 12a of the main rebar 12 from the upper direction with respect to the latching hole 28a of the latching part 28 of the mediation connection members 22 and 24. Thus, since the main reinforcing bar 12 can be hooked in the hooking hole 28a, the connecting operation between the intermediate connecting members 22 and 24 and the main reinforcing bar 12 can be facilitated.

また、本実施の形態に係る柱脚構造20によれば、その仲介連結部材22と24の互いの掛止部28が、仲介連結部材22と24それぞれの本体部26の四辺部の各長さ方向に、交互にずれて配置されていることにより、主鉄筋12を上側と下側の本体部26の間で水平方向に交互にずらして配置することができるので、2つの仲介連結部材22と24が、上下方向に比較的近接して配置されていても、下側の仲介連結部材24の掛止部28の掛止用孔28aに、主鉄筋12の折り曲げ部12aを上方から挿し込む際の、この主鉄筋12の上下方向の移動経路と、上側の仲介連結部材22の掛止部28又は上側4本の主鉄筋12とが、互いに干渉しないようにすることができる。   In addition, according to the column base structure 20 according to the present embodiment, the latching portions 28 of the mediation connecting members 22 and 24 have the respective lengths of the four sides of the body portion 26 of the mediation connecting members 22 and 24. Since the main reinforcing bars 12 can be alternately shifted in the horizontal direction between the upper and lower body portions 26 by being alternately displaced in the direction, the two intermediate connecting members 22 and 24, when the bent portion 12a of the main rebar 12 is inserted from above into the hooking hole 28a of the hooking portion 28 of the lower intermediate coupling member 24, even if they are arranged relatively close to each other in the vertical direction. The movement path of the main reinforcing bar 12 in the vertical direction and the hooking portion 28 of the upper intermediate connecting member 22 or the upper four main reinforcing bars 12 can be prevented from interfering with each other.

このため、本実施の形態に係る柱脚構造20によれば、その下側の仲介連結部材24の掛止部28の掛止用孔28aに、主鉄筋12の折り曲げ部12aを掛止するときの作業を容易にすることができる。   For this reason, according to the column base structure 20 according to the present embodiment, when the bent portion 12a of the main reinforcing bar 12 is hooked in the hooking hole 28a of the hooking portion 28 of the lower intermediate connecting member 24. Can be made easier.

また、本実施の形態に係る柱脚構造20によれば、その仲介連結部材22,24のそれぞれの、本体部26と掛止部28とが、当初において別個に製作され、後から溶接により一体化されるので、仮に、鉄骨柱4を中心とする4方向の各方向に伸びるように配置される複数の主鉄筋12のうち、いずれかの方向の主鉄筋12の本数を減らしたり無くしたりする場合には、これに応じて掛止部28の個数を減らしたり無くしたりすることができ、或は主鉄筋12の位置を変更したり調整したりする場合には、これに応じて掛止部28の位置を変更したり調整したりすることができるので、現場の状況に容易に対応することができる。   Further, according to the column base structure 20 according to the present embodiment, the main body portion 26 and the latching portion 28 of each of the intermediate connecting members 22 and 24 are manufactured separately at the beginning, and are integrated by welding later. Therefore, the number of the main reinforcing bars 12 in any direction is reduced or eliminated among the plurality of main reinforcing bars 12 arranged to extend in each of the four directions centering on the steel column 4. In this case, the number of the latching portions 28 can be reduced or eliminated accordingly, or when the position of the main reinforcing bar 12 is changed or adjusted, the latching portions are accordingly adjusted. Since the position of 28 can be changed or adjusted, it is possible to easily cope with the situation at the site.

次に、図8を参照して、本発明の第3の実施の形態に係る柱脚構造40について説明する。前記第1の実施の形態に係る柱脚構造2と同様の部分には同じ符号を用いて説明し、同様の構成についての重複する説明は省略するものとする。   Next, a column base structure 40 according to a third embodiment of the present invention will be described with reference to FIG. The same parts as those of the column base structure 2 according to the first embodiment will be described using the same reference numerals, and overlapping descriptions of the same configurations will be omitted.

図8は、前記第1の実施の形態に係る柱脚構造2を説明する際に参照した図3に相当するものである。本実施の形態に係る柱脚構造40は、主鉄筋12の折り曲げ部12aの先端部に、この折り曲げ部12aが、仲介連結部材8の掛止用孔10から容易に抜けないようにするための抜け止めブロック42が固定されている。この抜け止めブロック42は、主鉄筋12の折り曲げ部12aを、仲介連結部材8の掛止用孔10に差し込んだ後に溶接により固定される。   FIG. 8 corresponds to FIG. 3 referred to when describing the column base structure 2 according to the first embodiment. The column base structure 40 according to the present embodiment is configured so that the bent portion 12a does not easily come off from the hooking hole 10 of the intermediate connecting member 8 at the distal end portion of the bent portion 12a of the main reinforcing bar 12. A retaining block 42 is fixed. The retaining block 42 is fixed by welding after inserting the bent portion 12a of the main reinforcing bar 12 into the retaining hole 10 of the intermediate connecting member 8.

このような本実施の形態に係る柱脚構造40によれば、前記第1の実施の形態と同様の効果の他に、主鉄筋12の折り曲げ部12aの先端部に抜け止めブロック42が固定されているので、仲介連結部材8と主鉄筋12の端部との連結作業の後に行なう基礎コンクリート6の充填作業中などに、主鉄筋12の折り曲げ部12aが、仲介連結部材8の掛止用孔10から上方に外れてしまうことを防止することができる。   According to the column base structure 40 according to the present embodiment, the retaining block 42 is fixed to the distal end portion of the bent portion 12a of the main reinforcing bar 12 in addition to the same effects as the first embodiment. Therefore, during the filling operation of the basic concrete 6 performed after the connecting operation between the intermediate connecting member 8 and the end portion of the main reinforcing bar 12, the bent portion 12a of the main reinforcing bar 12 is inserted into the latching hole of the intermediate connecting member 8. It can be prevented from coming off from 10 upward.

なお、前記第1から第3の実施の形態に係る柱脚構造2,20,40においては、仲介連結部材8、又は仲介連結部材22,24を上下2段に配置するようになっていたが、1段だけ、或いは、上下3段以上に配置するようになっていてもよい。   In the column base structures 2, 20, and 40 according to the first to third embodiments, the intermediate connecting member 8 or the intermediate connecting members 22, 24 are arranged in two upper and lower stages. It may be arranged in only one stage or in three or more stages above and below.

また、前記第2の実施の形態に係る柱脚構造20においては、その仲介連結部材22,24のそれぞれの本体部26と掛止部28とが、別個に製作された後に、溶接により一体化される場合について説明したが、この本体部26と掛止部28とが当初から一体的に形成されるようになっていてもよい。   Further, in the column base structure 20 according to the second embodiment, the main body portion 26 and the latching portion 28 of each of the intermediate connecting members 22 and 24 are separately manufactured and then integrated by welding. Although the case where it was performed was demonstrated, this main-body part 26 and the latching | locking part 28 may be integrally formed from the beginning.

また、前記第3の実施の形態に係る柱脚構造40においては、その主鉄筋12の折り曲げ部12aの先端部に抜け止めブロック42が固定されていたが、この抜け止めブロック42の代わりに、主鉄筋12の折り曲げ部12aの先端部におねじを形成し、ナットのめねじをねじ結合させるようにしてもよい。   Further, in the column base structure 40 according to the third embodiment, the retaining block 42 is fixed to the distal end portion of the bent portion 12a of the main reinforcing bar 12, but instead of the retaining block 42, A screw may be formed at the tip of the bent portion 12a of the main reinforcing bar 12, and the female screw of the nut may be screwed.

また、前記第1から第3の実施の形態に係る柱脚構造2,20,40においては、主鉄筋12の折り曲げ部12aを、仲介連結部材8、又は仲介連結部材22,24の上方からそれらの掛止用孔10や28aに挿し込んで掛止するようになっていたが、主鉄筋12の折り曲げ部12aを、仲介連結部材8、又は仲介連結部材22,24の下方からそれらの掛止用孔10や28aに挿し込んで掛止するようになっていてもよい。   Further, in the column base structures 2, 20, and 40 according to the first to third embodiments, the bent portions 12a of the main reinforcing bars 12 are arranged from above the intermediate connecting member 8 or the intermediate connecting members 22, 24. The bent portion 12a of the main reinforcing bar 12 is engaged with the intermediate connection member 8 or the intermediate connection members 22 and 24 from below the intermediate connection member 8 or 28a. It may be inserted into the service hole 10 or 28a and hooked.

また、前記第1の実施の形態に係る柱脚構造2においては、主鉄筋12が、鉄骨柱4を略中心として、水平面上における90°間隔の4方向のうちの3方向にのみ配置されるようになっていたが、1方向又は2方向にのみ配置されるようになっていてもよく、或いは、4方向に配置されるようになっていてもよい。   Further, in the column base structure 2 according to the first embodiment, the main reinforcing bars 12 are arranged only in three directions out of four directions at intervals of 90 ° on the horizontal plane with the steel column 4 as a substantial center. However, it may be arranged only in one direction or two directions, or may be arranged in four directions.

また、前記第1から第3の実施の形態に係る柱脚構造2,20,40においては、仲介連結部材8、又は仲介連結部材22,24に、鉄骨柱4が貫通して嵌合する開口部8a、26aが形成された場合について説明したが、仲介連結部材には、鉄骨柱4が貫通できるような開口部を形成しないで、鉄骨柱4の下端面がそのような開口部が無い仲介連結部材の上面部の上に設置されるようにしてもよく、或は、鉄骨柱4が上下方向に分断されてその一部が、複数の仲介連結部材間に挟まれて設置されるようにしてもよい。   Further, in the column base structures 2, 20, and 40 according to the first to third embodiments, the opening through which the steel column 4 penetrates and fits into the intermediate connecting member 8 or the intermediate connecting members 22, 24. Although the case where the portions 8a and 26a are formed has been described, the mediation connecting member does not have an opening through which the steel column 4 can penetrate, and the lower end surface of the steel column 4 has no such opening. It may be installed on the upper surface portion of the connecting member, or the steel column 4 is divided in the vertical direction so that a part thereof is sandwiched between a plurality of intermediate connecting members. May be.

本発明の第1の実施の形態に係る柱脚構造2を示す一部断面側面図である。It is a partial cross section side view which shows the column base structure 2 which concerns on the 1st Embodiment of this invention. 本発明の第1の実施の形態に係る柱脚構造2を示す一部断面上面図である。It is a partial cross section top view which shows the column base structure 2 which concerns on the 1st Embodiment of this invention. 図2に示す柱脚構造2のA−A線矢視の部分拡大断面図である。It is a partial expanded sectional view of the column base structure 2 shown in FIG. 本発明の第2の実施の形態に係る柱脚構造20を示す一部断面側面図である。It is a partial cross section side view which shows the column base structure 20 which concerns on the 2nd Embodiment of this invention. 本発明の第2の実施の形態に係る柱脚構造20を示す一部断面上面図である。It is a partial cross section top view which shows the column base structure 20 which concerns on the 2nd Embodiment of this invention. 図4に示す柱脚構造20の仲介連結部材22のみのB−B線矢視図である。It is a BB arrow directional view of only the mediation connection member 22 of the column base structure 20 shown in FIG. 図4に示す柱脚構造20の仲介連結部材24のC−C線矢視図である。It is CC arrow directional view of the mediation connection member 24 of the column base structure 20 shown in FIG. 本発明の第3の実施の形態に係る柱脚構造40を示す部分拡大断面図である。It is a partial expanded sectional view which shows the column base structure 40 which concerns on the 3rd Embodiment of this invention.

符号の説明Explanation of symbols

2 柱脚構造
4 鉄骨柱
4a 下端部
6 基礎コンクリート
8 仲介連結部材
8a 開口部
10 掛止用孔
12 主鉄筋
12a 折り曲げ部
20 柱脚構造
22,24 仲介連結部材
26 本体部
26a 開口部
28 掛止部
28a 掛止用孔
40 柱脚構造
42 抜け止めブロック
2 Column base structure 4 Steel column 4a Lower end part 6 Basic concrete 8 Mediation connecting member 8a Opening 10 Latching hole 12 Main reinforcement 12a Bending part 20 Column base structure 22, 24 Intermediary connection member 26 Main body part 26a Opening part 28 Latching Part 28a Latching hole 40 Column base structure 42 Retaining block

Claims (8)

建築構造物における鉄骨柱に設置した仲介連結部材によって、基礎コンクリート中において前記鉄骨柱と主鉄筋とが連結される柱脚構造であって、前記仲介連結部材には上下方向に貫通する掛止用孔が形成され、前記主鉄筋の端部に設けた折り曲げ部を前記掛止用孔に挿し込んで掛止することを特徴とする柱脚構造。   It is a column base structure in which the steel column and the main reinforcing bar are connected in foundation concrete by an intermediate connecting member installed on a steel column in a building structure, and the intermediate connecting member is used for latching that penetrates in the vertical direction. A column base structure in which a hole is formed and a bent portion provided at an end portion of the main reinforcing bar is inserted into the hooking hole to be hooked. 前記鉄骨柱は、前記仲介連結部材に形成された開口部に嵌合されていることを特徴とする請求項1に記載の柱脚構造。   The column base structure according to claim 1, wherein the steel column is fitted into an opening formed in the mediation connecting member. 前記鉄骨柱は、前記仲介連結部材の上面部に設置されていることを特徴とする請求項1に記載の柱脚構造。   The column base structure according to claim 1, wherein the steel column is installed on an upper surface portion of the mediation connecting member. 前記掛止用孔の内周面が、挿し込まれる主鉄筋の形状に合うように拡径していることを特徴とする請求項1から3のいずれかに記載の柱脚構造。   The column base structure according to any one of claims 1 to 3, wherein an inner peripheral surface of the hooking hole is expanded in diameter so as to match a shape of a main reinforcing bar to be inserted. 前記鉄骨柱の高さ方向に前記仲介連結部材が複数設置され、上下方向に隣り合う仲介連結部材の掛止用孔同士が、上下方向に重ならないように水平方向にずれて形成されていることを特徴とする請求項1から4のいずれかに記載の柱脚構造。   A plurality of the intermediate connection members are installed in the height direction of the steel column, and the latching holes of the intermediate connection members adjacent in the vertical direction are formed so as to be shifted in the horizontal direction so as not to overlap in the vertical direction. The column base structure according to any one of claims 1 to 4, wherein: 前記仲介連結部材は、前記掛止用孔を有する掛止部と、掛止部を設置する本体部とで形成されていることを特徴とする請求項1から5のいずれかに記載の柱脚構造。   The column base according to any one of claims 1 to 5, wherein the mediation connecting member is formed by a latching portion having the latching hole and a main body portion on which the latching portion is installed. Construction. 前記主鉄筋の折り曲げ部に、主鉄筋の折り曲げ部が掛止用孔から抜けるのを防止する抜け止め部が設けられていることを特徴とする請求項1から6のいずれかに記載の柱脚構造。   The column base according to any one of claims 1 to 6, wherein the bent part of the main reinforcing bar is provided with a retaining part for preventing the bent part of the main reinforcing bar from coming off from the hooking hole. Construction. 前記主鉄筋の折り曲げ部を前記掛止用孔に掛止した状態において、前記掛止用孔にはコンクリート等のグラウト材が充填できる程度の間隙を有していることを特徴とする請求項1から7のいずれかに記載の柱脚構造。   2. The state in which the bent portion of the main reinforcing bar is hooked in the hooking hole, the hooking hole has a gap that can be filled with a grout material such as concrete. Column base structure in any one of from 7.
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