【０００１】
【発明の属する技術分野】
本発明は木造家屋等における柱のホゾ抜け及び筋交い両端の離脱を防止して耐震性と免震性を向上させるようにした耐震補強用具及び耐震補強方法に関するものである。
【０００２】
【従来の技術】
従来から木造家屋等における筋交いの入っていない壁は、図１２（Ａ）（Ｂ）に示したように地震力ＡによってＢ部分の柱１の引き抜けは起こらずに壁３０が崩壊する。３は横架材、４は土台である。他方で図１３（Ａ）（Ｂ）に示したように横架材３と土台４間に筋交い２が入っている壁３０は、地震力Ａによって圧縮側では筋交い２が有効に抵抗するが、Ｃ部分で柱１に強い引抜力Ｄが作用して、柱１の下端部と土台４間の接合部が抜ける「ホゾ抜け」５が発生して地震力Ａの反復により家屋が倒壊する。例えば阪神大震災においては柱１に最大４トンの引抜力が働いたことが報告されており、一度ホゾ抜け５が発生すると柱１は元に戻らないことが通例である。
【０００３】
図１４に示したように横架材３と柱１間を継手６，６で連結した例では、柱１と土台４及び土台４と基礎７とが緊締金物及びアンカーボルト等で緊結されていない場合には、図１４のイ部では図１５に示したように柱１の２階胴差し部分１ａが浮き上がり、柱１の腰折れとか継手６の回転現象が発生して該継手６が外れてしまう事態が生じる。また、中間部分では図１４のロ部で図１６に示したように筋交い２と柱１とが各矢印に示した方向に移動して継手６が外れてしまうことになる。何れも倍率の高い筋交いを数少なく配置した場合に生じやすく、筋交いが圧縮筋交いとして作用することに原因がある。
【０００４】
上記に対処して、従来２本の柱間に上部は柱に近接する部分の梁にボルト接合し、下部は柱に近接する部分の基礎に土台を挟んでアンカーボルトで接合する一体の金物で固定したターンバックル付きたすき掛け鉄筋筋交いで構成される木造軸組耐力壁により建物に加わる外力が基礎まで確実に伝達されて倒壊しにくくする手段が提供されている（特許文献１参照）。
【０００５】
しかしながら、前記柱１，土台４及び基礎７を緊結した場合は、柱１の上端と横架材３の接合部が抜けて地震力の反復により建物が倒壊する。阪神大震災ではこのホゾ抜けにより比較的新しい木造住宅の倒壊が起きたことが問題となり、平成１２年６月建築基準法の改正で「木造の継手及び仕口の構造方法」が規定された（非特許文献１参照）。この平成１２年６月以前に建てられた木造建物は、基礎７と土台４をアンカーボルトで接合し、柱１と土台４及び横架材３と柱１の接合部はホゾに木栓打ち又はカスガイ打ち程度の技術により施工された結果、阪神大震災では比較的新しい建物でもホゾ抜けにより建物が倒壊している。そのため前記建築基準法の改正でホールダウン金物等の使用が規定された。
【０００６】
【特許文献１】
特開平９−３１７００６号公報
【非特許文献１】
平成１２年６月建築基準法告示第１４６０号
【０００７】
【発明が解決しようとする課題】
上記したように建築基準法の改正でホールダウン金物等の使用が規定されたことにより、新築の木造家屋における柱の下端部と土台間の接合部が抜けるホゾ抜けは防止可能であるが、建築基準法の改正以前に建てられた既設の木造建物のホゾ抜けによる建物の倒壊を防止するための耐震補強は、原則的に壁体の改造が必要となり、外付けホールダウン金物の取付けにも戸袋その他の障害物等により壁面等の改造が必要な場合が多く、経済的及び工期の面で満足する耐震補強方法が得られていないのが実情である。
【０００８】
そこで本発明は既設の木造家屋に耐震補強を施す過程で壁面の改造を必要とせずにホゾ抜け及び筋交い両端の離脱を防止して、耐震性能の向上と合わせて材料のもつ特性による免震性能の向上をはかることができる耐震補強用具及び耐震補強方法を提供することを目的としている。
【０００９】
【課題を解決するための手段】
本発明は上記目的を達成するために、木造家屋における横架材と基礎との間に配設する耐震補強用具と耐震補強方法を得ることを主眼としており、横架材の側面に締結された横架材固定板と、横架材固定板の下側部に配設された上部結合器及び該上部結合器に連結された上部固定金具と、基礎又は土台の側面に固定された左右一対の支持部材及び該支持部材の下部に支持固定された下部結合器と、該下部結合器に連結された下部固定金具と、上部固定金具と下部固定金具間に連結固定されたワイヤロープとを具備してなる耐震補強用具と耐震補強方法を基本手段としている。
【００１０】
具体的な耐震補強方法として、既設の木造家屋における横架材に横架材固定板を締結するとともに、該横架材固定板の下側部に左右一対の支持部材及びボルト軸を介在して上部結合器を固定して、ワイヤロープの上端部を上部結合器の上部固定金具に連結してから該上部固定金具を上部結合器に緊結調整し、基礎又は土台の側面に左右一対の支持部材及び該支持部材の下部に下部結合器を固定してから前記ワイヤロープの下端部を下部結合器の下部固定金具に連結して、該下部固定金具を下部結合器に緊結調整して耐震補強用具の装着を完了する。
【００１１】
かかる耐震補強用具及び耐震補強方法によれば、新築の木造家屋でなくて建築基準法の改正以前に建てられた既設の木造家屋であっても、原則的に壁体の改造を不要として柱のホゾ抜け及び筋交い両端の離脱による建物の倒壊を防止することが可能であり、耐震性と免震性を向上させた耐震補強用具と耐震補強方法が提供される。
【００１２】
【発明の実施の形態】
以下図面に基づいて本発明にかかる耐震補強用具及び耐震補強方法の実施形態を、従来の構成と同一の構成部分に同一の符号を付して説明する。図１は既設の木造家屋に耐震補強を施した本発明の第１実施例を示す正面図、図２は同側断面図であり、図中の１は柱、３は横架材、４は土台、７はコンクリート製の基礎であって、横架材３と土台４間に筋交い２が配設されている。図２に示す８は室内に内装された壁材、９は床材、１０は天井材である。
【００１３】
上記横架材３と基礎７間に本発明にかかる耐震補強用具が装着されている。以下に耐震補強用具の構造と装着方法を説明する。１１は横架材固定板であり、図３の要部拡大分解斜視図に示したように、側面視が略Ｌ字状の横架材固定板１１の側面部１１ａに側面視が逆Ｌ字状のフック１２がボルト３２，３２により固着されて横架材の上面に配置され、補助フック１３とボルト１４を併用して該フック１２が横架材固定板１１の脱落を防止した状態として図２に示すように横架材３の上面に係止されている。
【００１４】
１５，１５は平面視が逆Ｌ字状の左右一対の支持部材であって、図３の要部拡大分解斜視図に示したように、この支持部材１５，１５の上面開口部を被覆するように側面視が逆Ｌ字状の連結具４３がボルト４４によって固着されている。この連結具４３を横架材固定板１１の平面部１１ｂの下側にボルト止めすることにより、支持部材１５，１５が横架材固定板１１に固着されている。更に、支持部材１５，１５の下端部には側板１６，１６が一体に突設されており、この側板１６，１６が図２に示すように横架材３の下面に位置している。
【００１５】
横架材固定板１１の平面部１１ｂには、下方から一対のボルト軸１７，１７が貫通してスプリングナット１８，１８により弛みが防止された状態として連結されており、該ボルト軸１７，１７の下端部には、断面逆Ｌ字状の上部結合器１９が固着されている。この上部結合器１９の平面部１９ａを貫通してＵ型の上部固定金具２０が連結されており、該上部固定金具２０の下端部にワイヤロープ２１の上端部が連結されている。このワイヤロープ２１は支持部材１５，１５と側板１６，１６間に橋絡固定された鋼製の棒状体２２，２２の間を交互に縫うように曲折してから下方に延長している。
【００１６】
２３，２３は平面視が逆Ｌ字状の左右一対の支持部材であり、図４の要部拡大分解斜視図に示したように、この支持部材２３，２３の下面開口部を被覆するように側面視が逆Ｌ字状の連結具４５がボルト４６によって固着されている。この連結具４５を下部結合器２５の平面部２５ａの上側にボルト止めすることにより、支持部材２３，２３が下部結合器２５に固着されている。更に、支持部材２３，２３の上端部には側板２４，２４が一体に突設されており、この側板２４，２４が図２に示すように土台４の上面に位置している。
【００１７】
２５は支持部材２３，２３の直下にあって基礎７の側面に固定された下部結合器であり、この下部結合器２５の平面部２５ａを貫通して逆Ｕ型の下部固定金具２７がスプリングナット２８，２８により弛みが防止された状態として連結されている。前記ワイヤロープ２１は側板２４と支持部材２３，２３間に橋絡固定された鋼製の棒状体２６，２６を交互に縫うように曲折してから下方に延長しており、下端部が下部結合器２５の下部固定金具２７に連結されている。スプリングナット２８は前記スプリングナット１８とともに免震性能を高める機能を有している。
【００１８】
以下に本発明にかかる耐震補強用具の装着方法を説明すると、先ず横架材３の側面にボルト止めにより横架材固定板１１を締結し、この横架材固定板１１にボルト３２，３２を用いてフック１２を取付け、補助フック１３とボルト１４を用いてフック１２を横架材３の上面に係止する。次に横架材固定板１１の平面部１１ｂの下方から一対のボルト軸１７，１７を貫通してスプリングナット１８，１８を用いて連結し、該ボルト軸１７，１７の下端部に上部結合器１９を固着してから上部結合器１９の平面部１９ａを貫通して上部固定金具２０を連結し、該上部固定金具２０の下端部にワイヤロープ２１の上端部を連結固定する。上部固定金具２０はワイヤロープ２１の緊結時にボルトの自転を防止する機能を有している。
【００１９】
次に横架材固定板１１の平面部１１ｂの下部に左右一対の支持部材１５，１５を挿入して連結具４３を介してボルト止めにより固定し、該支持部材１５，１５と一体の側板１６，１６を横架材３の下面に突出させ、ワイヤロープ２１を支持部材１５，１５と側板１６，１６間に橋絡固定された棒状体２２，２２を交互に縫うように曲折させて下方に垂下させる。
【００２０】
次に土台４と基礎７の側面にボルト３１，３１により支持部材２３，２３を固定してから該支持部材２３，２３と一体の側板２４，２４を土台４の上部に位置させ、この支持部材２３，２３の直下の基礎７の側面に下部結合器２５をボルト止めにより固定し、ワイヤロープ２１の下端部を側板２４と支持部材２３，２３間に橋絡固定された棒状体２６，２６を介在して下方に延ばして下部結合器２５に固定された逆Ｕ型の下部固定金具２７に連結し、下部結合器２５の平面部２５ａと下部固定金具２７とをスプリングナット２８，２８により緊結調整して耐震補強用具の装着が完了する。この第１実施例では上部結合器１９と下部結合器２５が上下方向に一直線上に配置されており、その結果ワイヤロープ２１は柱１と平行に緊締されている。
【００２１】
図５乃至図８は本発明の第２実施例を示しており、基本的な構成は第１実施例と同一であって同一の符号を付して表示してある。前記図２に示したように横架材３の直下に位置する棒状体２２には、ワイヤロープ２１の緊張によってＣ方向、即ち図面上の右方向への応力が作用し、土台４の真上に位置する棒状体２６にも同様にワイヤロープ２１の緊張によってＤ方向、即ち図面上の右方向への応力が作用して長期使用時に該棒状体２２，２６の変形等が生じることが予測されるので、これに対処するため図５，図６に示したように横架材３の室外側下側部に断面略Ｃ字状の金具３３を固着する一方、横架材３の下面に断面Ｌ字状の金具３４を固着し、両金具３３，３４間をボルト３５とナット３６を用いて締結することにより、金具３４の壁面に衝接している棒状体２２のＣ方向への変形を防止している。
【００２２】
また、図７，図８に示したように土台４の室外側上側部に断面略Ｃ字状の金具３７を固着する一方、土台４の上面に断面Ｌ字状の金具３８を固着し、両金具３７，３８間をボルト３９とナット４０を用いて締結することにより、金具３８の壁面に衝接している棒状体２６のＤ方向への変形を防止している。
【００２３】
図９は本発明の第３実施例を示しており、基本的な構成は第１実施例と同一であって同一の符号を付して表示してある。この第３実施例の特徴は上部結合器１９と下部結合器２５の位置を左右にずらして配置することにより、ワイヤロープ２１を斜めに、即ち筋交い２と平行に配置したことである。そのため、図２により説明したように横架材３の直下に位置する棒状体２２にはワイヤロープ２１の緊張によってＣ方向への応力が作用し、土台４の真上に位置する棒状体２６にも同様にワイヤロープ２１の緊張によってＤ方向への応力が作用して棒状体２２，２６の変形等が生じる惧れがあるため、横架材３に固定された一方の支持部材１５の内側に図１０の要部拡大図に示した半円形のリング４１を固着しておき、上端部が上部固定金具２０に連結されたワイヤロープ２１を該リング４１内を通してから下方に導出する。同様に土台４に固定された一方の支持部材２３の内側にも図１１の要部拡大図に示す半円形のリング４２を固着しておき、ワイヤロープ２１を該リング４２内を通してから下部固定金具２７に連結してある。上記したように上部固定金具２０と下部固定金具２７とをリング４１，４２を介在してワイヤロープ２１により連結することによって構成部材の耐久性を高めることができる。なお、４７は平板状の補強金具であり、ボルト４８によって一方の支持部材１５を横架材３に固着して強度を高めている。同様に４９は平板状の補強金具であり、ボルト５０によって一方の支持部材２３を土台４に固着して強度を高めている。
【００２４】
【発明の効果】
以上詳細に説明したように、本発明によれば建築基準法の改正以前に建てられた既設の木造家屋であっても、原則的に戸袋その他の障害物等による壁体の改造を不要として柱のホゾ抜け及び筋交い両端の離脱による建物の倒壊を防止することが可能であり、経済的及び工期の面でも満足できるとともに耐震性と免震性をより一層向上させた耐震補強用具と耐震補強方法を提供することができる。
【００２５】
特に木造家屋の横架材と土台とを上部固定金具と下部固定金具及びワイヤロープを利用して緊結調整することにより、左右交互に横ゆれする地震及び上下縦ゆれする地震に対しても柱のホゾ抜け及び筋交い両端の離脱を効果的に防止して、建物の倒壊を防止することができる。
【００２６】
従って本発明は既設の木造家屋に耐震補強を施す過程で壁面の改造を必要とせず、耐震性能の向上と合わせて材料の持つ特性による免震性能の向上をはかることができる耐震補強用具及び耐震補強方法を提供することができる。
【図面の簡単な説明】
【図１】本発明にかかる耐震補強を施した状態を示す正面図。
【図２】図１の側断面図。
【図３】図１の要部拡大分解斜視図。
【図４】図１の要部拡大分解斜視図。
【図５】本発明の第２実施例を示す要部側断面図。
【図６】図５の要部斜視図。
【図７】本発明の第２実施例の他の形態を示す要部側断面図。
【図８】図７の要部斜視図。
【図９】本発明の第３実施例を示す正面図。
【図１０】図９の要部拡大図。
【図１１】図９の他の部分の要部拡大図。
【図１２】従来の木造家屋における柱の取付構造を示す要部概要図。
【図１３】従来の木造家屋における他の柱の取付構造を示す要部概要図。
【図１４】従来の木造家屋における柱の取付構造を示す概要図。
【図１５】図１４の要部拡大図。
【図１６】図１４の要部拡大図。
【符号の説明】
１…柱
２…筋交い
３…横架材
４…土台
７…基礎
１１…横架材固定板
１２…フック
１３…補助フック
１４…ボルト
１５，２３…支持部材
１６，２４…側板
１７…ボルト軸
１８，２８…スプリングナット
１９…上部結合器
２０…上部固定金具
２１…ワイヤロープ
２２，２６…棒状体
２５…下部結合器
２７…下部固定金具[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic retrofitting tool and a seismic retrofitting method for preventing seizure of pillars and detachment of both ends of a brace in a wooden house or the like to improve seismic resistance and seismic isolation.
[0002]
[Prior art]
12 (A) and 12 (B), the wall 30 is collapsed without the column 1 of the portion B being pulled out by the seismic force A as shown in FIGS. Reference numeral 3 denotes a horizontal member, and reference numeral 4 denotes a base. On the other hand, as shown in FIGS. 13 (A) and 13 (B), the wall 30 in which the brace 2 enters between the horizontal member 3 and the base 4 effectively resists the brace 2 on the compression side due to the seismic force A. A strong pulling force D acts on the column 1 at the portion C, and a "mortise" 5 in which the joint between the lower end of the column 1 and the base 4 comes off occurs, and the house collapses due to the repetition of the seismic force A. For example, in the Great Hanshin Earthquake, it has been reported that a maximum of 4 tons of pull-out force has been applied to the pillar 1, and it is customary that the pillar 1 does not return to its original state once the tenon 5 comes out.
[0003]
In the example in which the horizontal member 3 and the column 1 are connected by the joints 6 and 6 as shown in FIG. 14, the column 1 and the base 4 and the base 4 and the foundation 7 are not connected to each other by a fastener or an anchor bolt. In this case, as shown in FIG. 15, the second-floor trunk portion 1 a of the column 1 rises in the portion a of FIG. 14, and the column 6 breaks or the joint 6 rotates, and the joint 6 comes off. Things happen. In the middle part, the brace 2 and the column 1 move in the directions shown by the arrows in the part B of FIG. 14 as shown in FIG. 16, and the joint 6 comes off. All of these tend to occur when a few braces with a high magnification are arranged, and the brace acts as a compression brace.
[0004]
To cope with the above, conventionally the upper part is bolted to the beam of the part close to the pillar between the two pillars, and the lower part is an integral metal piece that is connected to the foundation of the part close to the pillar with the base sandwiched by the anchor bolts A means has been provided in which an external force applied to a building is reliably transmitted to a foundation by a wooden frame load-bearing wall composed of a crossed reinforcing bar with a fixed turnbuckle, thereby making the building hard to collapse (see Patent Document 1).
[0005]
However, when the column 1, the base 4 and the foundation 7 are tied together, the joint between the upper end of the column 1 and the horizontal member 3 comes off, and the building collapses due to repeated seismic force. In the Great Hanshin Earthquake, it became a problem that a relatively new wooden house collapsed due to this mortise, and in June 2000 a revision of the Building Standards Law stipulated the "structure method of wooden joints and connections" (non Patent Document 1). In the wooden building built before June 2000, the foundation 7 and the base 4 are joined with anchor bolts, and the joints between the pillars 1 and the base 4 and the horizontal members 3 and the pillars 1 are wood-plugged into a tenon. As a result of being constructed using a technique similar to Kasuga hitting, even the relatively new building collapsed due to a tenon in the Great Hanshin Earthquake. Therefore, the amendment of the Building Standards Law stipulates the use of hole-down hardware.
[0006]
[Patent Document 1]
JP-A-9-317006 [Non-patent document 1]
June 2000 Notification of Building Standard Law No. 1460 [0007]
[Problems to be solved by the invention]
As mentioned above, the revision of the Building Standards Law stipulates the use of hole-down hardware, etc., so that it is possible to prevent the joint between the lower end of the pillar and the base of the newly built wooden house from coming off, In order to prevent the collapse of existing wooden buildings that were built before the amendment of the Standard Law, the walls must be remodeled in principle to prevent the collapse of the buildings due to the mortise of the mortise. Remodeling of the walls and the like is often required due to other obstacles and the like, and the fact is that a seismic retrofit method that is economically and satisfactorily in terms of the construction period has not been obtained.
[0008]
Therefore, the present invention prevents seizure and detachment of both ends of the brace without modifying the wall surface in the process of applying the seismic reinforcement to the existing wooden house, and the seismic isolation performance due to the characteristics of the material together with the improvement of the seismic performance It is an object of the present invention to provide a seismic retrofitting tool and a seismic retrofitting method capable of improving the quality.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has as its main object to obtain a seismic retrofitting tool and a seismic retrofitting method to be disposed between a horizontal member and a foundation in a wooden house, and is fastened to a side surface of the horizontal member. A horizontal member fixing plate, an upper coupler disposed on the lower side of the horizontal member fixing plate, an upper fixing bracket connected to the upper coupler, and a pair of right and left fixed to the side surface of the foundation or base. The vehicle includes a support member, a lower coupler supported and fixed below the support member, a lower fixture connected to the lower coupler, and a wire rope connected and fixed between the upper fixture and the lower fixture. The basic means are seismic reinforcement tools and seismic reinforcement methods.
[0010]
As a concrete seismic retrofitting method, a horizontal member fixing plate is fastened to a horizontal member in an existing wooden house, and a pair of left and right support members and a bolt shaft are interposed on the lower side of the horizontal member fixing plate. After fixing the upper coupler and connecting the upper end of the wire rope to the upper fixing bracket of the upper coupler, the upper fixing bracket is tightly adjusted to the upper coupler, and a pair of right and left support members are provided on the side of the foundation or the base. And fixing the lower coupler to the lower part of the support member, connecting the lower end of the wire rope to the lower fixing bracket of the lower coupler, adjusting the lower fixing bracket to the lower coupler, and adjusting the seismic resistance. Complete the installation of.
[0011]
According to such a seismic retrofitting tool and seismic retrofitting method, even if it is not a new wooden house but an existing wooden house built before the amendment of the Building Standards Law, in principle, it is not necessary to modify the wall, A seismic retrofitting tool and a seismic retrofitting method capable of preventing a building from being collapsed due to a tenon dropout and detachment of both ends of a brace and having improved seismic resistance and seismic isolation are provided.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a seismic retrofitting tool and an antiseismic retrofitting method according to the present invention will be described with reference to the drawings, in which the same reference numerals are given to the same components as the conventional configuration. 1 is a front view showing a first embodiment of the present invention in which an existing wooden house is subjected to seismic reinforcement, FIG. 2 is a sectional side view of the same, 1 in the figure is a column, 3 is a horizontal member, and 4 is A base 7 is a concrete base, and a brace 2 is provided between the horizontal member 3 and the base 4. Reference numeral 8 shown in FIG. 2 is a wall material installed in the room, 9 is a floor material, and 10 is a ceiling material.
[0013]
The seismic retrofitting device according to the present invention is mounted between the horizontal member 3 and the foundation 7. The structure and mounting method of the seismic retrofitting equipment will be described below. Numeral 11 denotes a horizontal member fixing plate, as shown in an enlarged exploded perspective view of a main part of FIG. The hooks 12 are fixed on bolts 32, 32 and arranged on the upper surface of the horizontal member, and the auxiliary hooks 13 and the bolts 14 are used together to prevent the hook 12 from falling off the horizontal member fixing plate 11. 2, it is locked on the upper surface of the horizontal member 3.
[0014]
Reference numerals 15 and 15 denote a pair of left and right support members having an inverted L-shape in plan view. As shown in an enlarged exploded perspective view of a main part of FIG. A connecting member 43 having an inverted L-shape in side view is fixed by a bolt 44. The connecting members 43 are bolted to the lower side of the flat portion 11b of the horizontal member fixing plate 11, whereby the support members 15, 15 are fixed to the horizontal member fixing plate 11. Further, side plates 16, 16 are integrally formed at the lower ends of the support members 15, 15, and the side plates 16, 16 are located on the lower surface of the horizontal member 3 as shown in FIG.
[0015]
A pair of bolt shafts 17, 17 penetrate from below and are connected to the flat portion 11b of the horizontal member fixing plate 11 in a state where the bolt nuts 17, 18 are prevented from being loosened by the spring nuts 18, 18. An upper coupler 19 having an inverted L-shaped cross section is fixed to the lower end of the upper coupler. A U-shaped upper fixing bracket 20 is connected to the upper coupler 19 through a flat portion 19a, and an upper end of a wire rope 21 is connected to a lower end of the upper fixing bracket 20. The wire rope 21 is bent so as to alternately sew between the steel rods 22 fixed to the support members 15 and 15 and the side plates 16 and 16 and then extends downward.
[0016]
Reference numerals 23, 23 denote a pair of left and right support members having an inverted L-shape in plan view. As shown in an enlarged exploded perspective view of a main part in FIG. 4, the support members 23, 23 cover lower surface openings of the support members 23, 23. A connecting member 45 having an inverted L-shape in side view is fixed by a bolt 46. The connecting members 45 are bolted to the upper side of the flat portion 25a of the lower coupler 25 so that the support members 23 are fixed to the lower coupler 25. Further, side plates 24, 24 are integrally protruded from upper ends of the support members 23, 23, and the side plates 24, 24 are located on the upper surface of the base 4 as shown in FIG.
[0017]
Reference numeral 25 denotes a lower coupler directly below the support members 23, 23 and fixed to the side surface of the foundation 7, and penetrates the flat portion 25a of the lower coupler 25 to form an inverted U-shaped lower fixing bracket 27 and a spring nut. 28, 28 are connected in a state where the slack is prevented. The wire rope 21 is bent so as to alternately sew steel rods 26, 26 fixedly bridged between the side plate 24 and the support members 23, 23, and then extends downward. It is connected to the lower fixture 27 of the container 25. The spring nut 28 has a function of improving the seismic isolation performance together with the spring nut 18.
[0018]
The method of mounting the seismic retrofitting tool according to the present invention will be described below. First, the horizontal member fixing plate 11 is fastened to the side surface of the horizontal member 3 by bolting, and the bolts 32, 32 are attached to the horizontal member fixing plate 11. The hook 12 is attached to the horizontal member 3 by using the auxiliary hook 13 and the bolt 14. Next, a pair of bolt shafts 17, 17 are penetrated from below the flat portion 11b of the horizontal member fixing plate 11 and connected using spring nuts 18, 18, and an upper coupler is connected to lower ends of the bolt shafts 17, 17. After fixing 19, the upper fixing bracket 20 is connected through the flat portion 19a of the upper coupler 19, and the upper end of the wire rope 21 is connected and fixed to the lower end of the upper fixing bracket 20. The upper fixture 20 has a function of preventing the bolt from rotating when the wire rope 21 is tightened.
[0019]
Next, a pair of left and right support members 15, 15 are inserted into the lower part of the flat portion 11 b of the horizontal member fixing plate 11, and are fixed by bolts via the connecting members 43, and the side plate 16 integrated with the support members 15, 15 is provided. , 16 protrude from the lower surface of the horizontal member 3, and the wire rope 21 is bent downward so as to alternately sew the rod-like bodies 22, 22 fixed between the support members 15, 15 and the side plates 16, 16. Let it hang down.
[0020]
Next, the support members 23, 23 are fixed to the side surfaces of the base 4 and the foundation 7 with bolts 31, 31, and the side plates 24, 24 integrated with the support members 23, 23 are positioned on the upper part of the base 4, and the support members The lower coupler 25 is fixed to the side surface of the foundation 7 directly below the base members 23 by bolts, and the lower ends of the wire ropes 21 are fixed to the side plates 24 and the rod-like members 26 and 26 fixed between the support members 23 and 23 by bridging. The lower coupler 25 is connected to an inverted U-shaped lower fixing bracket 27 fixed to the lower coupler 25 by extending downward, and the flat part 25a of the lower coupler 25 and the lower fixing bracket 27 are tightly adjusted by spring nuts 28,28. Then the installation of the seismic retrofit is completed. In the first embodiment, the upper coupler 19 and the lower coupler 25 are arranged in a straight line in the vertical direction, so that the wire rope 21 is tightened parallel to the column 1.
[0021]
FIGS. 5 to 8 show a second embodiment of the present invention. The basic configuration is the same as that of the first embodiment, and is denoted by the same reference numerals. As shown in FIG. 2, a stress in the C direction, that is, a rightward direction in the drawing acts on the rod-shaped body 22 located immediately below the horizontal member 3 due to the tension of the wire rope 21, and the rod 4 is located directly above the base 4. Similarly, it is expected that the tension in the wire rope 21 causes a stress in the direction D, that is, a rightward direction in the drawing due to the tension of the wire rope 21 to act on the rod-like body 26, and the rod-like body 22, 26 is deformed during long-term use. Therefore, in order to cope with this, as shown in FIGS. 5 and 6, a metal fitting 33 having a substantially C-shaped cross section is fixed to the lower portion on the outdoor side of the horizontal member 3, while a cross section is formed on the lower surface of the horizontal member 3. By fixing the L-shaped fitting 34 and fastening the two fittings 33 and 34 with bolts 35 and nuts 36, the deformation of the rod 22 in contact with the wall surface of the fitting 34 in the C direction is prevented. are doing.
[0022]
As shown in FIGS. 7 and 8, a metal fitting 37 having a substantially C-shaped cross section is fixed to the upper outdoor portion of the base 4, and a metal fitting 38 having an L-shaped cross section is fixed to the upper surface of the base 4. By fastening the metal fittings 37 and 38 with the bolts 39 and the nuts 40, deformation of the rod-shaped body 26 in contact with the wall surface of the metal fitting 38 in the direction D is prevented.
[0023]
FIG. 9 shows a third embodiment of the present invention. The basic configuration is the same as that of the first embodiment, and is denoted by the same reference numerals. A feature of the third embodiment is that the wire ropes 21 are arranged obliquely, that is, parallel to the brace 2 by displacing the positions of the upper coupler 19 and the lower coupler 25 to the left and right. Therefore, as described with reference to FIG. 2, a stress in the C direction acts on the rod-shaped body 22 located immediately below the horizontal member 3 due to the tension of the wire rope 21, and the rod-shaped body 26 located directly above the base 4 is acted upon. Similarly, since the tension in the wire rope 21 may cause stress in the direction D to cause deformation of the rods 22 and 26, the inside of one of the support members 15 fixed to the horizontal member 3 may also occur. The semi-circular ring 41 shown in the enlarged view of the main part of FIG. 10 is fixed, and the wire rope 21 whose upper end is connected to the upper fixing bracket 20 is guided downward through the inside of the ring 41. Similarly, a semicircular ring 42 shown in an enlarged view of a main part of FIG. 11 is fixed to the inside of one support member 23 fixed to the base 4, and the wire rope 21 is passed through the ring 42, and the lower fixing bracket 27. As described above, by connecting the upper fixing bracket 20 and the lower fixing bracket 27 with the wire rope 21 via the rings 41 and 42, the durability of the constituent members can be enhanced. Reference numeral 47 denotes a plate-like reinforcing bracket, and one of the support members 15 is fixed to the horizontal member 3 by a bolt 48 to increase the strength. Similarly, reference numeral 49 denotes a flat reinforcing metal, and one of the support members 23 is fixed to the base 4 by bolts 50 to increase the strength.
[0024]
【The invention's effect】
As described in detail above, according to the present invention, even in the case of an existing wooden house built before the revision of the Building Standards Law, it is basically unnecessary to remodel the wall with a door pocket or other obstacles, etc. The seismic retrofitting tool and seismic retrofitting method that can prevent the collapse of the building due to the mortise of the tenon and the detachment of both ends of the brace, which is satisfactory in terms of economy and construction period, and further improved seismic resistance and seismic isolation Can be provided.
[0025]
In particular, by tightening and adjusting the horizontal members and the base of the wooden house using the upper fixing bracket, the lower fixing bracket, and the wire rope, the pillars can be used for earthquakes that alternately shake horizontally and vertically and vertically. It is possible to effectively prevent the mortise and the two ends of the brace from being detached, thereby preventing the building from collapsing.
[0026]
Therefore, the present invention does not require the modification of the wall surface in the process of providing seismic retrofit to an existing wooden house, and the seismic retrofitting tool and the seismic retrofit that can improve the seismic isolation performance due to the characteristics of the material together with the improvement of the seismic performance A method of reinforcement can be provided.
[Brief description of the drawings]
FIG. 1 is a front view showing a state where seismic reinforcement according to the present invention is performed.
FIG. 2 is a side sectional view of FIG.
FIG. 3 is an enlarged exploded perspective view of a main part of FIG. 1;
FIG. 4 is an enlarged exploded perspective view of a main part of FIG. 1;
FIG. 5 is a sectional side view of a main part showing a second embodiment of the present invention.
FIG. 6 is a perspective view of a main part of FIG. 5;
FIG. 7 is a sectional side view of a main part showing another embodiment of the second embodiment of the present invention.
FIG. 8 is a perspective view of a main part of FIG. 7;
FIG. 9 is a front view showing a third embodiment of the present invention.
FIG. 10 is an enlarged view of a main part of FIG. 9;
FIG. 11 is an enlarged view of a main part of another part of FIG. 9;
FIG. 12 is a schematic view of a main part showing a mounting structure of a pillar in a conventional wooden house.
FIG. 13 is a schematic view of a main part showing a mounting structure of another pillar in a conventional wooden house.
FIG. 14 is a schematic diagram showing a mounting structure of a pillar in a conventional wooden house.
FIG. 15 is an enlarged view of a main part of FIG. 14;
FIG. 16 is an enlarged view of a main part of FIG. 14;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Pillar 2 ... Brace 3 ... Horizontal member 4 ... Base 7 ... Foundation 11 ... Horizontal member fixing plate 12 ... Hook 13 ... Auxiliary hook 14 ... Bolt 15, 23 ... Support members 16, 24 ... Side plate 17 ... Bolt shaft 18 , 28 ... spring nut 19 ... upper coupler 20 ... upper fixture 21 ... wire rope 22, 26 ... rod 25 ... lower coupler 27 ... lower fixture
