JP5334707B2 - Reinforcement method of beams in wooden buildings - Google Patents

Reinforcement method of beams in wooden buildings Download PDF

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JP5334707B2
JP5334707B2 JP2009153060A JP2009153060A JP5334707B2 JP 5334707 B2 JP5334707 B2 JP 5334707B2 JP 2009153060 A JP2009153060 A JP 2009153060A JP 2009153060 A JP2009153060 A JP 2009153060A JP 5334707 B2 JP5334707 B2 JP 5334707B2
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JP2011006972A (en
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滋 田島
亮二 足立
一彦 栗林
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Sumitomo Forestry Co Ltd
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本発明は、主として住宅の梁を補強する際に用いられる木造建築物における梁の補強方法に関する。   The present invention relates to a method of reinforcing a beam in a wooden building mainly used for reinforcing a beam of a house.

住宅においては、家族構成の変動や生活指向の変化等に伴い、新築当時の間取りを変更して下階に広い空間を確保したいというニーズが生じる。   In homes, there is a need to secure a large space on the lower floor by changing the floor plan at the time of new construction due to changes in family structure and changes in lifestyle.

かかるニーズに応えるためには、居室の中央付近や隣接居室の境界に立設されている柱を撤去するリフォーム工事を行うことになるが、柱を撤去すると、該柱の頂部が接合されていた既存梁が下方に撓む不具合を生じるとともに、場合によっては柱梁架構の水平剛性が低下し、ひいては建物全体の耐震性も低下する。   In order to meet such needs, renovation work will be performed to remove the pillars standing near the center of the living room or at the boundary of the adjacent living room, but when the pillars were removed, the tops of the pillars were joined. In addition to the problem that the existing beams bend downward, in some cases, the horizontal rigidity of the column beam frame is lowered, and consequently the earthquake resistance of the entire building is also lowered.

そのため、柱を撤去する場合には、該柱の頂部が接合されていた既存梁の下方に添梁を配置したり(特許文献1)、既存梁の下面に添梁を接着するとともに既存梁が架け渡されている一対の柱に添柱をそれぞれ接着して添柱と添梁との接合部に補強板を接着する(特許文献2,3)。   Therefore, when removing a column, a beam is arranged below the existing beam to which the top of the column is joined (Patent Document 1), and the beam is bonded to the lower surface of the existing beam. The auxiliary pillars are bonded to the pair of pillars that are spanned, and the reinforcing plate is bonded to the joint between the auxiliary pillar and the auxiliary beam (Patent Documents 2 and 3).

かかる補強方法によれば、添梁によって既存梁の曲げ剛性が高くなるとともに、添梁、添柱及び補強板の協働作用によって柱梁架構の水平剛性も向上し、かくして既存梁の撓みが防止されるとともに、建物の耐震性も大幅に向上する。   According to such a reinforcing method, the bending rigidity of the existing beam is increased by the beam, and the horizontal rigidity of the column beam frame is also improved by the cooperative action of the beam, the beam, and the reinforcing plate, thus preventing the bending of the existing beam. In addition, the earthquake resistance of the building will be greatly improved.

特開2005-232678号公報Japanese Unexamined Patent Publication No. 2005-232678 特開2008-190169号公報JP 2008-190169 A 特開2007-270546号公報JP 2007-270546

ここで、上述した補強方法を実施するにあたっては、柱を撤去する前に予め支保工を設置し、該支保工で柱に作用する鉛直荷重をいったん仮受けする必要があるが、既存梁の直下に支保工を設置すると、該支保工が邪魔になって既存梁の下方に添梁を設置することができないという問題を生じていた。   Here, in carrying out the above-described reinforcing method, it is necessary to install a support work in advance before removing the column and temporarily receive a vertical load acting on the column by the support work. If a support work is installed on the beam, there is a problem that the support work cannot be installed below the existing beam because the support work becomes an obstacle.

一方、かかる問題を回避するため、柱を撤去する前に所定の治具で既存梁を仮受けし、該治具で柱に作用する鉛直荷重を受け替えた後、該柱を撤去する方法が提案されてはいるが(特許文献4)、リフォーム工事を効率よく進めるという点では必ずしも十分ではなかった。   On the other hand, in order to avoid such a problem, there is a method in which an existing beam is provisionally received with a predetermined jig before removing the column, the vertical load acting on the column is replaced with the jig, and then the column is removed. Although it has been proposed (Patent Document 4), it has not always been sufficient in terms of efficient renovation work.

本発明は、上述した事情を考慮してなされたもので、リフォーム工事において既存梁の補強を効率よく進めることが可能な木造建築物における梁の補強方法を提供することを目的とする。   The present invention has been made in consideration of the above-described circumstances, and an object of the present invention is to provide a beam reinforcing method in a wooden building that can efficiently reinforce an existing beam in a renovation work.

上記目的を達成するため、本発明に係る木造建築物における梁の補強方法は請求項1に記載したように、既存梁の中央近傍側面に束材を垂設して該束材の下端を前記既存梁の各端部近傍に引張材を介して連結し、該引張材に引張力を導入し、前記既存梁の下面に頂部が接合された柱を撤去し、前記既存梁の下方に添梁を設置するものである。   In order to achieve the above object, a beam reinforcing method in a wooden building according to the present invention is as described in claim 1, wherein a bundle member is suspended from a side surface near the center of an existing beam, and the lower end of the bundle member is Connected to each end of the existing beam via a tensile material, introducing a tensile force to the tensile material, removing the column whose top is joined to the lower surface of the existing beam, and attaching a beam below the existing beam Is to be installed.

また、本発明に係る木造建築物における梁の補強方法は、前記束材を湾曲状又は折曲げ状に形成するとともにその凸側が前記既存梁の側となるように該束材を前記既存梁に垂設するものである。   Further, in the method for reinforcing a beam in the wooden building according to the present invention, the bundle member is formed in a curved shape or a bent shape, and the bundle member is formed on the existing beam so that the convex side thereof is the side of the existing beam. It is intended to be suspended.

また、本発明に係る木造建築物における梁の補強方法は、溶接用開口が中央に形成され該溶接用開口を取り囲むように複数の挿通孔が環状に穿孔形成された円形台座と該溶接用開口の開口縁部に周縁が当接するように前記円形台座に突設された雌ネジ部とから構成され前記雌ネジ部の背面と前記開口縁部とを溶接してなるボルト取付け具を介して前記引張材を前記既存梁の各端部近傍に連結するものである。   Further, the beam reinforcing method in the wooden building according to the present invention includes a circular pedestal in which a welding opening is formed in the center and a plurality of insertion holes are formed in an annular shape so as to surround the welding opening, and the welding opening. Through a bolt fitting formed by welding a rear surface of the female screw portion and the opening edge portion, and a female screw portion projecting from the circular pedestal so that a peripheral edge abuts on the opening edge portion of the female screw portion. A tensile member is connected to the vicinity of each end of the existing beam.

また、本発明に係る木造建築物における梁の補強方法は、既存梁の各端部近傍に束材をそれぞれ立設して該束材を前記既存梁の中央近傍に引張材を介してそれぞれ連結し、該引張材に引張力を導入し、前記既存梁の下面に頂部が接合された柱を撤去し、前記既存梁の下方に添梁を設置するものである。   Further, in the method for reinforcing a beam in a wooden building according to the present invention, a bundle member is erected in the vicinity of each end of the existing beam, and the bundle member is connected to the vicinity of the center of the existing beam via a tensile member. Then, a tensile force is introduced into the tensile member, a column having a top part bonded to the lower surface of the existing beam is removed, and a supplementary beam is installed below the existing beam.

また、本発明に係る木造建築物における梁の補強方法は、前記既存梁の各端部近傍に立設された上階の柱を前記束材とするものである。   Moreover, the beam reinforcement method in the wooden building which concerns on this invention uses the pillar of the upper floor erected in the vicinity of each edge part of the said existing beam as said bundle material.

また、本発明に係る木造建築物における梁の補強方法は、溶接用開口が中央に形成され該溶接用開口を取り囲むように複数の挿通孔が環状に穿孔形成された円形台座と該溶接用開口の開口縁部に周縁が当接するように前記円形台座に突設された雌ネジ部とから構成され前記雌ネジ部の背面と前記開口縁部とを溶接してなるボルト取付け具を介して前記引張材を前記束材の上端及び前記既存梁の中央近傍にそれぞれ連結するものである。   Further, the beam reinforcing method in the wooden building according to the present invention includes a circular pedestal in which a welding opening is formed in the center and a plurality of insertion holes are formed in an annular shape so as to surround the welding opening, and the welding opening. Through a bolt fitting formed by welding a rear surface of the female screw portion and the opening edge portion, and a female screw portion projecting from the circular pedestal so that a peripheral edge abuts on the opening edge portion of the female screw portion. A tension member is connected to the upper end of the bundle member and the vicinity of the center of the existing beam.

また、本発明に係る木造建築物における梁の補強方法は、前記添梁を設置した後、所定の補剛板を、その上部が前記既存梁の側面に当接されその下部が前記添梁の側面に当接されるように前記既存梁及び前記添梁の各側面にそれぞれ接着し、該接着に用いた接着剤が硬化した後、前記引張材に導入されている引張力を解除して該引張材を取り外すものである。   Further, in the method for reinforcing a beam in a wooden building according to the present invention, after the beam is installed, a predetermined stiffening plate is attached to the side surface of the existing beam, and the lower part is attached to the side of the beam. Adhering to each side surface of the existing beam and the auxiliary beam so as to be in contact with the side surface, and after the adhesive used for the adhesion is cured, the tensile force introduced into the tensile material is released to The tension member is removed.

また、本発明に係る木造建築物における梁の補強方法は、前記添梁を設置した後、該添梁の下方に支保工を設置して該支保工の頂部を前記添梁の下面に当接させ、前記引張材に導入されている引張力を解除して該引張材を取り外し、所定の補剛板を、その上部が前記既存梁の側面に当接されその下部が前記添梁の側面に当接されるように前記既存梁及び前記添梁の各側面にそれぞれ接着するものである。   Further, in the method for reinforcing a beam in a wooden building according to the present invention, after the beam is installed, a support is installed below the beam and the top of the support is brought into contact with the lower surface of the beam. The tensile force introduced into the tension member is released, the tension member is removed, and a predetermined stiffening plate is attached to the side surface of the existing beam and the lower part is set to the side surface of the auxiliary beam. It is bonded to each side surface of the existing beam and the auxiliary beam so as to be in contact with each other.

本発明に係る木造建築物における梁の補強方法においては、まず、リフォーム工事を行う対象階における既存梁の中央近傍側面に束材を垂設し、該束材の下端を既存梁の各端部近傍に引張材を介して連結するか、又は、既存梁の各端部近傍に束材をそれぞれ立設し、該束材を既存梁の中央近傍に引張材を介してそれぞれ連結する。   In the method of reinforcing a beam in the wooden building according to the present invention, first, a bundle is suspended from the side surface near the center of the existing beam on the target floor where the renovation work is performed, and the lower end of the bundle is set to each end of the existing beam. They are connected in the vicinity via a tensile material, or a bundle material is erected near each end of the existing beam, and the bundle material is connected in the vicinity of the center of the existing beam via a tensile material.

次に、引張材に引張力を導入する。   Next, a tensile force is introduced into the tensile material.

このようにすると、引張材に導入された引張力の鉛直上向き分力、いわば押上げ力が束材を介してあるいは直接的に既存梁に作用し、かかる押上げ力が上載荷重を支持することとなり、既存梁の下面に頂部が接合された柱には鉛直荷重が作用しなくなる。これは、既存梁、引張材及び束材からなる支持構造が形成されるためであり、引張材が下弦材となる前者の場合は特に張弦梁と呼ばれる。   In this case, the vertical upward component force of the tensile force introduced to the tensile material, that is, the lifting force acts on the existing beam via the bundle material or directly, and this lifting force supports the overload. Thus, the vertical load does not act on the column whose top is joined to the lower surface of the existing beam. This is because a support structure composed of an existing beam, a tensile material, and a bundle material is formed. In the former case where the tensile material is a lower chord material, it is particularly called a stringed beam.

次に、上述した柱を撤去し、しかる後、既存梁の下方に添梁を設置する。   Next, the above-mentioned pillar is removed, and then a supporting beam is installed below the existing beam.

このように、リフォーム工事を行う対象階の既存梁に引張材及び束材を加えることによって木造建築物内に支持構造をあらたに構築し、かかる支持構造に上階からの鉛直荷重を支持させるようにしたので、既存梁の下方に支保工を設けずとも、既存梁の下方に立設された柱を撤去することが可能となる。   In this way, a support structure is newly constructed in the wooden building by adding a tensile material and a bundle to the existing beam on the target floor where the renovation work is to be performed, and the vertical load from the upper floor is supported by this support structure. As a result, it is possible to remove the pillars erected below the existing beams without providing support under the existing beams.

支持構造は上述したように2通りあり、上階床を撤去しない場合には、既存梁の中央近傍側面に束材を垂設し、該束材の下端を既存梁の各端部近傍に引張材を介して連結する(以下、張弦梁タイプ)。   As described above, there are two support structures. When the upper floor is not removed, a bundle is suspended from the side near the center of the existing beam, and the lower end of the bundle is pulled near each end of the existing beam. Connected via a material (hereinafter referred to as a stringed beam type).

一方、上階床を撤去する場合には、上述した手順に代えて、既存梁の各端部近傍に束材をそれぞれ立設し、該束材の例えば上端を既存梁の中央近傍に引張材を介してそれぞれ連結するようにしてもよい(以下、吊りタイプ)。   On the other hand, when removing the upper floor, instead of the above-described procedure, a bundle material is erected in the vicinity of each end of the existing beam, and for example, the upper end of the bundle material is placed near the center of the existing beam. You may make it each connect via (it suspends type hereafter).

ここで、張弦梁タイプにおいては、既存梁の中央近傍側面に束材を垂設するが、かかる束材によって柱の撤去作業や添梁の設置作業が妨げられる場合には、束材を湾曲状又は折曲げ状に形成するとともに、その凸側が既存梁の側となるように該束材を既存梁に垂設すればよい。   Here, in the stringed beam type, a bundle member is suspended from the side surface near the center of the existing beam, but if the bundle member hinders the column removal work or the attachment work of the beam, the bundle member is bent or What is necessary is just to suspend this bundle material in the existing beam so that the convex side may become the side of the existing beam while forming in a bending shape.

このようにすれば、既存梁の下方空間が拡がるので、柱の撤去作業や添梁の設置作業を行う際、柱や添梁が束材と干渉したり、束材が邪魔になって作業ができないという懸念がなくなる。   In this way, the space below the existing beam expands, so when removing the column or installing the beam, the column or beam interferes with the bundle material, or the bundle material interferes with the work. No worries that you can't.

引張材は、添梁を設置した後であれば、任意のタイミングで撤去することが可能である。   The tensile material can be removed at an arbitrary timing after the beam is installed.

すなわち、添梁の設置に引き続いて既存梁及び添梁に補剛板を接着する場合においては、補剛板の上部が既存梁の側面に当接され下部が添梁の側面に当接されるように、該補剛板を既存梁及び添梁の各側面にそれぞれ接着し、該接着に用いた接着剤の硬化後、引張材に導入されている引張力を解除して該引張材を取り外すことができる。   That is, when the stiffening plate is bonded to the existing beam and the sub-beam following the installation of the sub-beam, the upper portion of the stiffening plate is in contact with the side surface of the existing beam and the lower portion is in contact with the side surface of the sub-beam. As described above, the stiffening plate is bonded to each side surface of the existing beam and the accessory beam, and after the adhesive used for the bonding is cured, the tensile force introduced into the tensile material is released and the tensile material is removed. be able to.

かかる場合においては、上載荷重の支持が必要な間は引張材が継続的に設置され、上載荷重の支持が不要になった時点で引張材が撤去されるため、リフォーム工事の間、上載荷重を一貫して支持構造で支持することとなり、かくして上載荷重の処理に必要な部材や機材あるいは工事の手間を最小限に抑えることができる。   In such a case, the tensile material is continuously installed while it is necessary to support the upper load, and the tensile material is removed when the support of the upper load is no longer needed. The support structure is consistently supported, and thus the members, equipment, and construction labor necessary for processing the loading load can be minimized.

一方、添梁を設置した後、添梁の下方に支保工を設置し、該支保工で上載荷重を受け替えた後、引張材に導入されている引張力を解除して該引張材を取り外し、しかる後、補剛板の上部と下部が既存梁と添梁の側面にそれぞれ当接されように、該補剛板を既存梁及び添梁の各側面にそれぞれ接着するようにしてもよい。   On the other hand, after installing the girder, install a support under the girder, and after receiving the overload at the support, release the tensile force introduced into the tensile material and remove the tensile material Thereafter, the stiffening plate may be bonded to the side surfaces of the existing beam and the supporting beam so that the upper and lower portions of the stiffening plate are in contact with the side surfaces of the existing beam and the supporting beam, respectively.

かかる場合においては、添梁の設置後に支保工を設置しても何ら問題とはならないし、補剛板を接着する段階では、既存梁や添梁の側方で引張材が張設されていないため、引張材と補剛板とが干渉する懸念がなくなり、かくして補剛板の接着作業をスムーズに行うことが可能となる。   In such a case, there will be no problem even if a support is installed after the beam is installed, and there is no tension material on the side of the existing beam or beam at the stage where the stiffening plate is bonded. Therefore, there is no concern that the tensile material and the stiffening plate interfere with each other, and thus the stiffening plate can be smoothly adhered.

引張材は、例えば市販されているベルトタイプの荷締機で構成することが可能である。   The tension material can be constituted by, for example, a commercially available belt-type load clamping machine.

ここで、引張材は、張弦梁タイプにおいては、一端が既存梁中央近傍に垂設された束材の下端に、他端が既存梁の各端部近傍にそれぞれ連結され、吊りタイプにおいては、一端が既存梁の中央近傍に直接連結され、他端が既存梁の各端部近傍に立設された束材の例えば上端にそれぞれ連結されるが、既存梁の端部近傍とは、既存梁の端部をはじめ、その近傍に位置する別部材をも含む概念であり、例えば既存梁が接合された胴差し等の水平横架材が含まれる。   Here, the tension material is connected to the lower end of the bundle member suspended near the center of the existing beam in the stringed beam type, and to the lower end of each end of the existing beam in the suspended type. Is connected directly to the center of the existing beam, and the other end is connected to, for example, the upper end of a bundle standing near each end of the existing beam. It is a concept that includes another member located in the vicinity of the end portion, and includes a horizontal horizontal member such as a torso to which an existing beam is joined, for example.

引張材を既存梁や束材あるいは上述した別部材に連結するのに必要な取付け金物や取付け具については適宜選択すればよいが、例えば溶接用開口が中央に形成され該溶接用開口を取り囲むように複数の挿通孔が環状に穿孔形成された円形台座と、該溶接用開口の開口縁部に周縁が当接するように円形台座に突設された雌ネジ部とからなるとともに、該雌ネジ部の背面と開口縁部とを溶接して構成してなるボルト取付け具を採用することができる。   The fittings and fixtures necessary to connect the tensile member to the existing beam, bundle member or the above-described separate member may be selected as appropriate. For example, a welding opening is formed in the center and surrounds the welding opening. A circular pedestal having a plurality of insertion holes formed in an annular shape, and a female screw portion projecting from the circular pedestal so that a peripheral edge abuts on an opening edge of the welding opening. It is possible to employ a bolt mounting tool that is formed by welding the back surface and the opening edge.

かかるボルト取付け具を用いて既存梁や束材あるいは上述した別部材に引張材を連結するには、円形台座の背面を既存梁や束材あるいは上述した別部材に当接し、かかる状態で挿通孔に通された木ねじやビスをねじ込んでボルト取付け具を固定し、次いで、ボルト取付け具の雌ネジ部に引張材の端部を螺着する。引張材の端部が雌ネジ部に直接螺着できる構造になっていないのであれば、適当なボルト部材を介在させればよい。   In order to connect the tension member to the existing beam, the bundle member, or the above-described other member using such a bolt attachment, the back surface of the circular base is brought into contact with the existing beam, the bundle member, or the above-mentioned another member, and the insertion hole is in this state. The bolt mounting tool is fixed by screwing a wood screw or a screw passed through, and then the end of the tensile member is screwed to the female thread portion of the bolt mounting tool. If the end of the tension member is not structured to be screwed directly onto the female screw portion, an appropriate bolt member may be interposed.

吊りタイプにおける束材は、既存梁の各端部近傍に立設された上階の柱位置を避けて、胴差し等に適宜立設すればよいが、これに代えて、該上階の柱を前記束材としてもよい。   In the hanging type, the bundling material may be properly erected on the torso etc., avoiding the position of the upper floor pillars erected in the vicinity of each end of the existing beam. May be used as the bundle.

かかる構成においては、束材を別部材としてあらたに立設する必要がなくなり、リフォーム工事の手間が省ける。   In such a configuration, it is not necessary to newly stand the bundle as a separate member, and the work of renovation work can be saved.

第1実施形態に係る木造建築物における梁の補強方法の実施手順を示したフローチャート。The flowchart which showed the implementation procedure of the reinforcement method of the beam in the wooden building which concerns on 1st Embodiment. 既存梁3の中央近傍側面に束材4を垂設し、該束材の下端を既存梁3の各端部近傍に引張材5,5を介して連結した様子を示した図であり、(a)は正面図、(b)はA−A線に沿った断面図。It is the figure which showed a mode that the bundle material 4 was suspended by the side surface near the center of the existing beam 3, and the lower end of this bundle material was connected to each edge part vicinity of the existing beam 3 via the tension materials 5 and 5, a) is a front view, and (b) is a cross-sectional view along the line AA. 束材4を示した図であり、(a)は正面図、(b)は右側面図、(c)はB−B線に沿った断面図。It is the figure which showed the bundle material 4, (a) is a front view, (b) is a right view, (c) is sectional drawing along the BB line. ボルト取付け具8の全体斜視図。The whole perspective view of the bolt attachment tool 8. FIG. ボルト取付け具8の図であり、(a)は分解斜視図、(b)は断面図。It is a figure of the bolt attachment tool 8, (a) is a disassembled perspective view, (b) is sectional drawing. ボルト取付け具8の取付け状況を示した断面図。Sectional drawing which showed the attachment condition of the bolt attachment tool 8. FIG. 添梁71を設置した様子を示した図であり、(a)は正面図、(b)はC−C線に沿った断面図。It is the figure which showed a mode that the accessory beam 71 was installed, (a) is a front view, (b) is sectional drawing along CC line. 補剛板81を設置した様子を示した図であり、(a)は正面図、(b)はD−D線に沿った断面図。It is the figure which showed a mode that the stiffening board 81 was installed, (a) is a front view, (b) is sectional drawing along DD line. 変形例に係る正面図。The front view which concerns on a modification. 第2実施形態に係る木造建築物における梁の補強方法の実施手順を示したフローチャート。The flowchart which showed the implementation procedure of the reinforcement method of the beam in the wooden building which concerns on 2nd Embodiment. 既存梁3の各端部近傍に束材111,111を立設し、該束材を既存梁3の中央近傍側面に引張材5,5を介して連結した様子を示した正面図。The front view which showed a mode that the bundle materials 111 and 111 were stood near each edge part of the existing beam 3, and this bundle material was connected to the side surface near the center of the existing beam 3 via the tension materials 5 and 5. FIG. 添梁71及び補剛板81を設置した様子を示した正面図。The front view which showed a mode that the splicing beam 71 and the stiffening board 81 were installed.

以下、本発明に係る木造建築物における梁の補強方法の実施の形態について、添付図面を参照して説明する。なお、従来技術と実質的に同一の部品等については同一の符号を付してその説明を省略する。   DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a beam reinforcing method in a wooden building according to the present invention will be described with reference to the accompanying drawings. Note that components that are substantially the same as those of the prior art are assigned the same reference numerals, and descriptions thereof are omitted.

(第1実施形態) (First embodiment)

図1は、本実施形態に係る木造建築物における梁の補強方法の実施手順を示したフローチャートである。本実施形態に係る梁の補強方法においては、まず図2に示すように、リフォーム工事を行う対象階、本実施形態では一階において、天井(図示せず)を解体撤去した後、柱1,1に架け渡された既存梁3の中央近傍側面に束材4を垂設し、該束材の下端を既存梁3の各端部近傍に引張材5,5を介して連結する(ステップ201)。   FIG. 1 is a flowchart showing an execution procedure of a beam reinforcing method in a wooden building according to the present embodiment. In the beam reinforcement method according to the present embodiment, as shown in FIG. 2, first, after dismantling and removing the ceiling (not shown) on the target floor on which the renovation work is performed, in the first floor, The bundle member 4 is suspended from the side surface in the vicinity of the center of the existing beam 3 laid over 1, and the lower end of the bundle member is connected to the vicinity of each end portion of the existing beam 3 via the tension members 5 and 5 (step 201). ).

ここで、柱1,1の間には管柱2が立設されており、その頂部が既存梁3の下面に接合されることで、該管柱が二階からの上載荷重を一部負担しているが、本実施形態では、かかる管柱2の撤去とそれに伴う既存梁3の補強工事に本発明を適用する例として説明するものとする。   Here, the pipe column 2 is erected between the columns 1 and 1, and the top portion is joined to the lower surface of the existing beam 3, so that the tube column bears a part of the loading load from the second floor. However, in the present embodiment, an example in which the present invention is applied to the removal of the pipe column 2 and the reinforcement work of the existing beam 3 associated therewith will be described.

束材4は図3に示すように、全体として溝形鋼を弱軸廻りにかつフランジ側に折り曲げた形状をなす2つの溝形部材31a,31bで構成されてなる束材本体31を備え、該溝形部材のうち、材軸方向長さが短い溝形部材31aのウェブ32aにはビス孔33を形成してあり、該ウェブの背面を既存梁3の中央近傍側面に当接した状態でビス孔33にビス6を挿通してねじ込むことにより、図2に示したように既存梁3に垂設できるようになっている。   As shown in FIG. 3, the bundle member 4 includes a bundle member body 31 composed of two groove members 31 a and 31 b that are formed by bending the grooved steel around the weak axis and toward the flange as a whole. Among the groove-shaped members, screw holes 33 are formed in the web 32a of the groove-shaped member 31a having a short material axial direction length, and the back surface of the web is in contact with the side surface near the center of the existing beam 3. By inserting and screwing the screw 6 into the screw hole 33, it can be suspended from the existing beam 3 as shown in FIG.

一方、材軸方向長さが長い溝形部材31bのウェブ32bには、その先端の背面側に楕円プレート34を溶着してあるとともに、該楕円プレートのうち、溝形部材31bのフランジ面から両側方に延びる突出部36,36には、引張材5の先端が掛止される丸孔35,35をそれぞれ形成してある。   On the other hand, an elliptical plate 34 is welded to the web 32b of the groove-shaped member 31b having a long length in the material axis direction on the back side of the tip, and both sides of the elliptical plate from the flange surface of the groove-shaped member 31b. The projecting portions 36, 36 extending in the direction are formed with round holes 35, 35 on which the tip ends of the tension members 5 are hooked.

束材本体31は、例えばウェブの高さが100mm、フランジの幅が50mm、厚みが3.2mm程度の断面を有し部材長が100mmと650mm程度の2つの溝形鋼を、それらのウェブが互いに非平行となるようにかつフランジ側に折れ曲がり状になるように突き合わせて溶接し、短い方を溝形部材31a、長い方を溝形部材31bとしてもよいし、同様の断面を有し全長が750mm程度の溝形鋼を、その端部から100mm程度の箇所で折り曲げることで製作することも可能である。   The bundle material body 31 includes, for example, two channel steels having a cross section with a web height of 100 mm, a flange width of 50 mm, and a thickness of about 3.2 mm, and a member length of about 100 mm and about 650 mm. The short side may be a groove-shaped member 31a and the long side may be a groove-shaped member 31b so as to be non-parallel to each other and bent to the flange side, and the long side may be a groove-shaped member 31b. It is also possible to manufacture a grooved steel of about 750 mm by bending it at a location of about 100 mm from its end.

このように製作された束材4を図2(b)に示すように、折曲げ状に形成された凸側(外側)が既存梁3の側となるように該既存梁に垂設することにより、束材4が既存梁3に取り付けられた状態であっても、管柱2をスムーズに撤去することが可能となる。   As shown in FIG. 2 (b), the bundle member 4 manufactured in this way is suspended from the existing beam 3 so that the convex side (outer side) formed in a bent shape becomes the side of the existing beam 3. Thus, even when the bundle 4 is attached to the existing beam 3, the tube column 2 can be removed smoothly.

束材本体31の折曲げ角度θは、既存梁3に取り付けられた束材4と干渉することなく管柱2の撤去作業を円滑に進めることができるよう適宜定めればよく、例えば5゜程度に設定することができる。   The bending angle θ of the bundle body 31 may be determined as appropriate so that the tube column 2 can be smoothly removed without interfering with the bundle 4 attached to the existing beam 3, for example, about 5 °. Can be set to

引張材5としては、例えばベルトタイプの荷締機を採用することが可能であり、具体的には明大株式会社から「ロックスリング」(登録商標)の商品名で市販されている荷締機を採用することができる。   As the tension member 5, for example, a belt-type load-clamping machine can be adopted, and specifically, a machine-clamping machine sold under the trade name “Rock Sling” (registered trademark) by Meidai Co., Ltd. Can be adopted.

束材4の下端と既存梁3の各端部近傍との間には上述したように引張材5をそれぞれ張設してあり、図2で左側に位置する引張材5については、その右側端部を束材4の楕円プレート34に形成された左側の丸孔35に掛止するとともに、右側に位置する引張材5については、その左側端部を束材4の楕円プレート34に形成された右側の丸孔35に掛止してある。   As described above, the tension member 5 is stretched between the lower end of the bundle member 4 and the vicinity of each end of the existing beam 3, and the right end of the tension member 5 located on the left side in FIG. The portion is hooked in the left circular hole 35 formed in the elliptical plate 34 of the bundle 4 and the left end of the tensile member 5 located on the right is formed in the elliptical plate 34 of the bundle 4. It is hooked in the right round hole 35.

また、既存梁3の各端部は、該既存梁に直交配置された水平横架材としての胴差し7にそれぞれ接合されているが、左側に位置する引張材5は、その左端をボルト取付け具8を介して左側の胴差し7に連結し、右側に位置する引張材5は、その右端をボルト取付け具8を介して右側の胴差し7に連結してある。   In addition, each end of the existing beam 3 is joined to a case 7 as a horizontal horizontal member arranged orthogonal to the existing beam, but the tension member 5 located on the left side is bolted to the left end. The tensile member 5 located on the right side is connected to the left side case 7 via a tool 8, and the right end thereof is connected to the right side case 7 via a bolt attachment 8.

ボルト取付け具8は図4及び図5に示すように、六角形状をなす溶接用開口45が中央に形成され該溶接用開口を取り囲むように複数の挿通孔43が環状に穿孔形成された円形台座41と、溶接用開口45の開口縁部44に周縁が当接するように円形台座41に突設された雌ネジ部としてのナット42とから構成してあるとともに、ナット42の裏面と開口縁部44との間に隅肉継手あるいは重ね継手として溶接46を施すことにより、ナット42を円形台座41に強固に固定してある。   As shown in FIGS. 4 and 5, the bolt attachment 8 is a circular base in which a hexagonal welding opening 45 is formed in the center and a plurality of insertion holes 43 are formed in an annular shape so as to surround the welding opening. 41 and a nut 42 as a female thread portion protruding from the circular pedestal 41 so that the peripheral edge abuts on the opening edge 44 of the welding opening 45, and the back surface and the opening edge of the nut 42 The nut 42 is firmly fixed to the circular pedestal 41 by applying a weld 46 as a fillet joint or a lap joint between them 44.

溶接用開口45は、該溶接用開口の開口縁部44とナット42の裏面との間に必要十分な溶接を施すことができるよう、ナット42及び円形台座41の寸法形状とも併せて適宜その仕様を設定すればよい。   The specifications of the welding opening 45 are appropriately specified together with the dimensions of the nut 42 and the circular base 41 so that necessary and sufficient welding can be performed between the opening edge 44 of the welding opening and the back surface of the nut 42. Should be set.

ボルト取付け具8を用いて引張材5の端部を胴差し7に連結固定するには図6に示したように、ボルト取付け具8を、その円形台座41の背面が胴差し7の側面に当接されるように配置するとともに、挿通孔43にビス52を挿通して胴差し7にねじ込むことにより該胴差しに固定し、次いで、ナット42にボルト部材としてのアイリング51を螺着し、該アイリングに引張材5の端部を掛止すればよい。   In order to connect and fix the end of the tension member 5 to the barrel 7 using the bolt fixture 8, the bolt fixture 8 is connected to the side of the barrel 7 with the back of the circular base 41 as shown in FIG. 6. The screw 52 is inserted into the insertion hole 43 and screwed into the barrel 7 to be fixed to the barrel, and then an eye ring 51 as a bolt member is screwed onto the nut 42. The end of the tension member 5 may be hooked on the eye ring.

次に、引張材5,5に引張力を導入する(ステップ202)。   Next, a tensile force is introduced into the tensile members 5 and 5 (step 202).

引張力の導入は、引張材5の仕様や構造に応じて適宜操作すればよい。   The introduction of the tensile force may be appropriately operated according to the specifications and structure of the tensile material 5.

このようにすると、既存梁3、引張材5,5及び束材4が張弦梁を構成するため、引張材5に導入した引張力の鉛直上向き分力、いわば押上げ力が束材4を介して既存梁3に作用し、かかる押上げ力が管柱2に作用していた上載荷重を支持し、管柱2には鉛直荷重が作用しなくなる。   In this way, since the existing beam 3, the tensile members 5, 5 and the bundle member 4 constitute a stringed beam, the vertical upward component of the tensile force introduced into the tensile member 5, that is, the so-called push-up force is transmitted via the bundle member 4. It acts on the existing beam 3, and this lifting force supports the overload applied to the tube column 2, and the vertical load does not act on the tube column 2.

このように管柱2に作用していた上載荷重を既存梁3、引張材5,5及び束材4からなる張弦梁で受け替えたならば、次に、管柱2を撤去する(ステップ203)。   If the overload applied to the pipe column 2 is replaced by the stringed beam made up of the existing beam 3, the tensile members 5, 5 and the bundle member 4, the tube column 2 is then removed (step 203). .

管柱2を撤去するにあたり、既存梁3に垂設された束材4は上述したように、例えば5゜の角度で既存梁3から斜め下方に延びており、該既存梁を含む鉛直構面から離間している。そのため、束材4を残置した状態で管柱2の撤去作業を円滑に進めることができる。   In removing the pipe column 2, the bundle 4 suspended from the existing beam 3 extends obliquely downward from the existing beam 3 at an angle of 5 °, for example, as described above. It is away from. Therefore, the removal work of the pipe pillar 2 can be smoothly advanced in the state where the bundle 4 is left.

次に、図7に示すように既存梁3の下方に添梁71を配置するとともに、該添梁の上面を既存梁3の下面に接着する(ステップ204)。   Next, as shown in FIG. 7, the beam 71 is disposed below the existing beam 3, and the upper surface of the beam is bonded to the lower surface of the existing beam 3 (step 204).

次に、図8に示すように既存梁3及び添梁71を両側から挟み込むようにして補剛板81,81をそれらの側面に接着する(ステップ205)。補剛板81は、それらの上部が既存梁3の側面に当接され、下部が添梁71の側面に当接されるように、既存梁3及び添梁71の各側面に接着する。   Next, as shown in FIG. 8, the stiffening plates 81 and 81 are bonded to the side surfaces so as to sandwich the existing beam 3 and the accessory beam 71 from both sides (step 205). The stiffening plates 81 are bonded to the side surfaces of the existing beam 3 and the supporting beam 71 so that the upper portion thereof is in contact with the side surface of the existing beam 3 and the lower portion is in contact with the side surface of the supporting beam 71.

次に、接着剤の硬化後、引張材5,5に導入されていた引張力を解除し、次いで、ビス6を抜いて束材4を既存梁3から取り外すとともに、引張材5,5の他端をアイリング51から外すことで該引張材を撤去する(ステップ206)。   Next, after the adhesive is cured, the tensile force introduced into the tensile members 5 and 5 is released, and then the screw 6 is pulled out to remove the bundle member 4 from the existing beam 3 and The tensile material is removed by removing the end from the eye ring 51 (step 206).

なお、撤去された引張材5や束材4は、他の建築現場に適宜転用することができる。また、胴差し7に取り付けられているボルト取付け具8やそれに螺着されたアイリング51は、天井懐に設置されているため、残置しても問題はないが、これらを取り外すようにすれば、引張材5や束材4と同様、再利用が可能である。   In addition, the removed tension | pulling material 5 and the bundle material 4 can be diverted suitably to another construction site. Also, since the bolt attachment 8 attached to the torso 7 and the eye ring 51 screwed thereto are installed in the ceiling pocket, there is no problem even if they are left, but if they are removed, As with the tension member 5 and the bundle member 4, it can be reused.

以上説明したように、本実施形態に係る木造建築物における梁の補強方法によれば、リフォーム工事を行う一階の既存梁3に引張材5,5及び束材4を加えることによって木造建築物内に支持構造としての張弦梁をあらたに構築し、かかる張弦梁に二階からの鉛直荷重を支持させるようにしたので、既存梁3の下方に支保工を設けずとも、一階の管柱2を撤去することが可能となる。   As described above, according to the beam reinforcing method in the wooden building according to the present embodiment, the wooden building is obtained by adding the tensile members 5, 5 and the bundle member 4 to the existing beam 3 on the first floor where the renovation work is performed. Since a stringed beam as a support structure was newly built inside, and the vertical load from the second floor was supported by the stringed beam, the pipe column 2 on the first floor was removed without providing a support under the existing beam 3. It becomes possible to do.

また、本実施形態に係る木造建築物における梁の補強方法によれば、木造建築物内にあらたに構築する支持構造を張弦梁としたので、リフォーム対象階である一階だけが工事対象となり、二階については一切手を加える必要がない。そのため、リフォーム工事をより効率的に進めることが可能となる。   In addition, according to the method of reinforcing a beam in a wooden building according to the present embodiment, the support structure to be newly constructed in the wooden building is a stringed beam. There is no need to change anything. Therefore, it is possible to proceed with the renovation work more efficiently.

また、本実施形態に係る木造建築物における梁の補強方法によれば、束材4を折曲げ状に形成するとともに、その凸側が既存梁3の側となるように該束材を既存梁3に垂設するようにしたので、既存梁3の下方空間が拡がり、管柱2の撤去作業や添梁71の設置作業を行う際、管柱2や添梁71が束材4と干渉したり、束材4が邪魔になって作業ができないという懸念がなくなる。   Further, according to the beam reinforcing method in the wooden building according to the present embodiment, the bundle material 4 is formed in a bent shape, and the bundle material is used so that the convex side thereof becomes the side of the existing beam 3. Since the lower space of the existing beam 3 is expanded, the pipe column 2 and the beam 71 interfere with the bundle material 4 when the tube column 2 is removed and the beam 71 is installed. This eliminates the concern that the bundle 4 is in the way and the work cannot be performed.

また、本実施形態に係る木造建築物における梁の補強方法によれば、補剛板81の上部が既存梁3の側面に当接され下部が添梁71の側面に当接されるように、該補剛板を既存梁3及び添梁71の各側面にそれぞれ接着し、該接着に用いた接着剤の硬化後、引張材5,5に導入されている引張力を解除して該引張材を撤去するようにしたので、上載荷重の支持が必要な間は、引張材5,5が継続的に設置され、上載荷重の支持が不要になった時点で引張材5,5が撤去されるため、リフォーム工事中、上載荷重を一貫して張弦梁で支持することが可能となり、かくして上載荷重の処理に必要な部材や機材あるいは工事の手間を最小限に抑えることができる。   Further, according to the beam reinforcing method in the wooden building according to the present embodiment, the upper part of the stiffening plate 81 is in contact with the side surface of the existing beam 3 and the lower part is in contact with the side surface of the beam 71. The stiffening plate is bonded to each side surface of the existing beam 3 and the accessory beam 71, and after the adhesive used for the bonding is cured, the tensile force introduced into the tensile materials 5 and 5 is released to release the tensile material. Since the tension members 5 and 5 are continuously installed while the support of the overload is necessary, the tension members 5 and 5 are removed when the support of the overload becomes unnecessary. Therefore, during the renovation work, it is possible to consistently support the upper load with the stringed beam, and thus it is possible to minimize the members and equipment necessary for processing the upper load or the labor of the work.

また、本実施形態に係る木造建築物における梁の補強方法によれば、ボルト取付け具8を、その円形台座41の背面が胴差し7の側面に当接されるように配置し、挿通孔43に挿通されたビス52を該胴差しにねじ込むとともに、ナット42に螺合されたアイリング51に引張材5を連結するようにしたので、引張材5と胴差し7とを十分な引張強度で連結することが可能となり、かくして二階からの鉛直荷重を引張材5,5を含む張弦梁で確実に支持することが可能となる。   Further, according to the beam reinforcing method in the wooden building according to the present embodiment, the bolt attachment 8 is arranged so that the back surface of the circular pedestal 41 is in contact with the side surface of the trunk 7, and the insertion hole 43. Since the screw 52 inserted into the screw is screwed into the barrel and the tensile member 5 is connected to the eye ring 51 screwed into the nut 42, the tensile member 5 and the barrel 7 are connected with sufficient tensile strength. Thus, the vertical load from the second floor can be reliably supported by the string beam including the tension members 5 and 5.

本実施形態では、ボルト取付け具8及びそれに螺着されたアイリング51を介して引張材5の他端を胴差し7に連結するようにしたが、引張材5の他端を胴差し7に連結する構成は任意であって、かかる構成に代えて、公知の連結手段を適宜採用することができる。   In the present embodiment, the other end of the tension member 5 is connected to the barrel 7 via the bolt attachment 8 and the eye ring 51 screwed thereto. The structure to connect is arbitrary and it replaces with this structure and can employ | adopt well-known connection means suitably.

また、本実施形態では、引張材5の他端を既存梁3の端部近傍に位置する胴差し7の側面に連結するようにしたが、これに代えて既存梁3の端部、例えばその側面や下面に連結するようにしてもかまわない。   In the present embodiment, the other end of the tension member 5 is connected to the side surface of the trunk 7 located in the vicinity of the end of the existing beam 3, but instead of this, the end of the existing beam 3, for example, You may connect with a side surface or a lower surface.

また、本実施形態では、束材4を折曲げ状に形成したが、これに代えて湾曲状に形成してもよいし、管柱2の撤去や添梁71の設置に支障がないのであれば、かかる構成に代えて、真直な鋼材で構成してもかまわない。なお、束材をH形鋼などの他の鋼材で構成することができることは言うまでもない。   In this embodiment, the bundle member 4 is formed in a bent shape. However, instead of this, the bundle member 4 may be formed in a curved shape, and there is no problem in removing the tube column 2 or installing the beam 71. For example, instead of such a configuration, a straight steel material may be used. Needless to say, the bundle material can be made of other steel materials such as H-shaped steel.

また、本実施形態では、既存梁3の一方の側面にのみ、束材4を取り付けるようにしたが、これに代えて、既存梁の両側面に束材を取り付けるとともに、各束材の下端を既存梁の各端部近傍に引張材を介して連結するようにしてもかまわない。   In this embodiment, the bundle member 4 is attached only to one side surface of the existing beam 3, but instead, the bundle member is attached to both side surfaces of the existing beam, and the lower end of each bundle member is attached. You may make it connect through the tension | tensile_strength material near each edge part of the existing beam.

かかる構成によれば、既存梁3の梁軸方向から見たときの荷重の対称性が確保されることとなり、上載荷重をより確実かつ安全に支持することが可能となる。なお、本実施形態のように既存梁3の一方の側面にのみ束材4を取り付ける構成は、既存梁3が胴差しに相当する位置、すなわち建物外周部に配置されているために背面側に束材4を設置することができない場合に有利な構成となる。   According to such a configuration, the symmetry of the load when viewed from the beam axis direction of the existing beam 3 is ensured, and it becomes possible to more securely and safely support the upper load. In addition, the structure which attaches the bundle material 4 only to one side surface of the existing beam 3 like this embodiment, since the existing beam 3 is arrange | positioned in the position equivalent to a trunk, ie, a building outer peripheral part, it is on the back side. This is an advantageous configuration when the bundle 4 cannot be installed.

また、本実施形態では、既存梁3の補強対策として、該既存梁の下面に添梁71を接着した上、既存梁3及び添梁71の両側面に補剛板81,81を接着するようにしたが、既存梁3の下面に添梁71の上面を接着するだけで両者の一体化を図ることができるのであれば、補剛板81を省略してもかまわない。   In the present embodiment, as a measure for reinforcing the existing beam 3, the beam 71 is bonded to the lower surface of the existing beam 3 and the stiffening plates 81 and 81 are bonded to both side surfaces of the existing beam 3 and the beam 71. However, the stiffening plate 81 may be omitted if both can be integrated by simply bonding the upper surface of the beam 71 to the lower surface of the existing beam 3.

また、本実施形態では、引張材5が設置された状況であっても、補剛板81を取り付けることができるという前提で説明したが、引張材5が邪魔で補剛板81を取り付けることが困難であり又は作業効率が悪い場合には、図9に示すように、添梁71を設置した後、その下面に頂部が当接されるように支保工91を設置して該支保工で上載荷重を受け替え、しかる後、引張材5を緩めてこれを撤去してから上述と同様にして補剛板81を取り付けるようにしてもかまわない。   Further, in the present embodiment, the description has been made on the assumption that the stiffening plate 81 can be attached even when the tension member 5 is installed. However, the stiffening plate 81 may be attached due to the tension member 5 being in the way. When it is difficult or the work efficiency is poor, as shown in FIG. 9, after installing the beam 71, a support 91 is installed so that the top part comes into contact with the lower surface thereof, and the support is mounted on the support. It is also possible to replace the load and, after that, loosen the tension member 5 and remove it, and then attach the stiffening plate 81 in the same manner as described above.

かかる構成においては、添梁71の設置後に支保工91を設置しても何ら問題とはならないし、補剛板81を接着する段階では、既存梁3や添梁71の側方において引張材5が張設されていないため、引張材5と補剛板81とが干渉する懸念がなくなり、かくして補剛板81の接着作業をスムーズに行うことが可能となる。   In such a configuration, there is no problem even if the support 91 is installed after the beam 71 is installed, and at the stage where the stiffening plate 81 is bonded, the tensile material 5 is formed on the side of the existing beam 3 and the beam 71. Is not stretched, there is no concern that the tension member 5 and the stiffening plate 81 interfere with each other, and thus the stiffening plate 81 can be adhered smoothly.

(第2実施形態) (Second Embodiment)

次に、第2実施形態について説明する。なお、上述の実施形態と実質的に同一の部品等については同一の符号を付してその説明を省略する。   Next, a second embodiment will be described. Note that components that are substantially the same as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

図10は、本実施形態に係る木造建築物における梁の補強方法の実施手順を示したフローチャートである。本実施形態に係る梁の補強方法においては、まず図11に示すように、リフォーム工事を行う対象階(本実施形態では一階)の上階床、本実施形態では二階床を撤去し、次いで、柱1,1に架け渡された既存梁3の各端部近傍に束材111,111をそれぞれ立設して該束材の上端を既存梁3の中央近傍に引張材5,5を介してそれぞれ連結する(ステップ301)。   FIG. 10 is a flowchart showing an execution procedure of the beam reinforcing method in the wooden building according to the present embodiment. In the beam reinforcement method according to the present embodiment, first, as shown in FIG. 11, the upper floor of the target floor (the first floor in the present embodiment) on which the renovation work is performed, the second floor in the present embodiment is removed, and then The bundle members 111 and 111 are erected in the vicinity of each end of the existing beam 3 spanned between the columns 1 and 1, and the upper end of the bundle member is placed near the center of the existing beam 3 via the tension members 5 and 5. Are connected to each other (step 301).

ここで、柱1,1の間には管柱2が立設されており、その頂部が既存梁3の下面に接合されることで、該管柱が二階からの上載荷重を一部負担しているが、本実施形態では、かかる管柱2の撤去とそれに伴う既存梁3の補強工事に本発明を適用する例として説明するものとする。   Here, the pipe column 2 is erected between the columns 1 and 1, and the top portion is joined to the lower surface of the existing beam 3, so that the tube column bears a part of the loading load from the second floor. However, in the present embodiment, an example in which the present invention is applied to the removal of the pipe column 2 and the reinforcement work of the existing beam 3 associated therewith will be described.

束材111は、既存梁3の端部が接合された胴差し7,7の上面にそれぞれ立設してあり、例えば柱1と同程度の断面を有する木材で構成することができる。なお、柱1と同じ平面位置に上階柱が存在する場合、該上階柱の立設位置を避け、該上階柱の側方に束材111を立設すればよい。   The bundle material 111 is erected on the upper surfaces of the trunks 7 and 7 to which the ends of the existing beams 3 are joined, and can be made of wood having a cross section similar to that of the pillar 1, for example. In addition, when the upper floor pillar exists in the same plane position as the pillar 1, the standing material position of the upper floor pillar may be avoided and the bundle material 111 may be erected on the side of the upper floor pillar.

束材111,111の上端と既存梁3の中央近傍との間には上述したように引張材5をそれぞれ張設してあるが、図11で左側に位置する引張材5については、その右側端部を既存梁3の中央近傍側面に、左側端部を左側の束材111の上端にボルト取付け具8を介してそれぞれ連結してある。   As described above, the tension member 5 is stretched between the upper ends of the bundle members 111 and 111 and the vicinity of the center of the existing beam 3, but the tension member 5 located on the left side in FIG. The end is connected to the side surface near the center of the existing beam 3, and the left end is connected to the upper end of the left bundle 111 through a bolt attachment 8.

同様に、図11で右側に位置する引張材5については、その左側端部を既存梁3の中央近傍側面に、右側端部を右側の束材111の上端にボルト取付け具8を介してそれぞれ連結してある。   Similarly, with respect to the tension member 5 located on the right side in FIG. 11, its left end is on the side near the center of the existing beam 3, and the right end is on the upper end of the right bundle 111 via the bolt attachment 8. It is connected.

ボルト取付け具8を用いた連結手順は第1実施形態と同様であり、ボルト取付け具8を、その円形台座41の背面が既存梁3の側面や束材111の上端側面に当接されるように配置するとともに、挿通孔43にビス52を挿通してねじ込むことにより既存梁3や束材111に固定し、次いで、ナット42にアイリング51を螺着し、該アイリングに引張材5の端部を掛止すればよい。   The connecting procedure using the bolt attachment 8 is the same as that of the first embodiment, and the bolt attachment 8 is arranged such that the back surface of the circular pedestal 41 is brought into contact with the side surface of the existing beam 3 or the upper end side surface of the bundle material 111. In addition, the screw 52 is inserted into the insertion hole 43 and screwed into the existing beam 3 or the bundle material 111. Then, the eye ring 51 is screwed onto the nut 42, and the tensile material 5 is attached to the eye ring. What is necessary is just to hook an edge part.

次に、引張材5,5に引張力を導入する(ステップ302)。   Next, a tensile force is introduced into the tensile members 5 and 5 (step 302).

このようにすると、引張材5に導入した引張力の鉛直上向き分力、いわば押上げ力が既存梁3に作用し、かかる押上げ力が管柱2に作用していた上載荷重を支持し、管柱2には鉛直荷重が作用しなくなる。   In this way, the vertical upward component force of the tensile force introduced into the tensile member 5, that is, the pushing force acts on the existing beam 3, and the pushing force supports the overload applied to the pipe column 2, A vertical load does not act on the tube column 2.

このように管柱2に作用していた上載荷重を既存梁3、引張材5,5及び束材111,111からなる支持構造で受け替えたならば、次に、管柱2を撤去する(ステップ303)。   If the mounting load acting on the tube column 2 is replaced by the support structure composed of the existing beams 3, the tensile members 5, 5 and the bundle members 111, 111, the tube column 2 is then removed ( Step 303).

次に、図12に示すように既存梁3の下方に添梁71を配置するとともに、該添梁の上面を既存梁3の下面に接着する(ステップ304)。   Next, as shown in FIG. 12, the beam 71 is disposed below the existing beam 3, and the upper surface of the beam is bonded to the lower surface of the existing beam 3 (step 304).

次に、既存梁3及び添梁71を両側から挟み込むようにして補剛板81,81をそれらの側面に接着する(ステップ305)。補剛板81は、それらの上部が既存梁3の側面に当接され、下部が添梁71の側面に当接されるように、既存梁3及び添梁71の各側面に接着する。   Next, the stiffening plates 81 and 81 are bonded to the side surfaces so as to sandwich the existing beam 3 and the accessory beam 71 from both sides (step 305). The stiffening plates 81 are bonded to the side surfaces of the existing beam 3 and the supporting beam 71 so that the upper portion thereof is in contact with the side surface of the existing beam 3 and the lower portion is in contact with the side surface of the supporting beam 71.

次に、接着剤の硬化後、引張材5,5に導入されていた引張力を解除し、次いで、引張材5,5の両端をアイリング51からそれぞれ外すことで該引張材を撤去する(ステップ306)。   Next, after the adhesive is cured, the tensile force introduced into the tensile members 5 and 5 is released, and then the tensile members 5 and 5 are removed from the eye ring 51 by removing both ends of the tensile members 5 and 5 ( Step 306).

以上説明したように、本実施形態に係る木造建築物における梁の補強方法によれば、リフォーム工事を行う一階の既存梁3に引張材5,5及び束材111,111を加えることによって木造建築物内に支持構造をあらたに構築し、かかる支持構造に二階からの鉛直荷重を支持させるようにしたので、既存梁3の下方に支保工を設けずとも、一階の管柱2を撤去することが可能となる。   As described above, according to the method of reinforcing a beam in the wooden building according to the present embodiment, by adding the tensile members 5 and 5 and the bundle members 111 and 111 to the existing beam 3 on the first floor where the renovation work is performed, Since a new support structure was built in the building, and the vertical load from the second floor was supported by the support structure, the pipe pillar 2 on the first floor was removed without providing a support under the existing beam 3. It becomes possible to do.

また、本実施形態に係る木造建築物における梁の補強方法によれば、補剛板81の上部が既存梁3の側面に当接され下部が添梁71の側面に当接されるように、該補剛板を既存梁3及び添梁71の各側面にそれぞれ接着し、該接着に用いた接着剤の硬化後、引張材5,5に導入されている引張力を解除して該引張材を撤去するようにしたので、上載荷重の支持が必要な間は、引張材5,5が継続的に設置され、上載荷重の支持が不要になった時点で引張材5,5が撤去されるため、リフォーム工事中、上載荷重を一貫して上述の支持構造で支持することが可能となり、かくして上載荷重の処理に必要な部材や機材あるいは工事の手間を最小限に抑えることができる。   Further, according to the beam reinforcing method in the wooden building according to the present embodiment, the upper part of the stiffening plate 81 is in contact with the side surface of the existing beam 3 and the lower part is in contact with the side surface of the beam 71. The stiffening plate is bonded to each side surface of the existing beam 3 and the accessory beam 71, and after the adhesive used for the bonding is cured, the tensile force introduced into the tensile materials 5 and 5 is released to release the tensile material. Since the tension members 5 and 5 are continuously installed while the support of the overload is necessary, the tension members 5 and 5 are removed when the support of the overload becomes unnecessary. Therefore, during the renovation work, it is possible to consistently support the upper load with the above-described support structure, and thus it is possible to minimize the members, equipment, and work required for the processing of the upper load.

また、本実施形態に係る木造建築物における梁の補強方法によれば、ボルト取付け具8を、その円形台座41の背面が既存梁3の側面や束材111の上端側面に当接されるように配置し、挿通孔43に挿通されたビス52を既存梁3や束材111にねじ込むとともに、ナット42に螺合されたアイリング51に引張材5を連結するようにしたので、引張材5と束材111とを十分な引張強度で連結することが可能となり、かくして二階からの鉛直荷重を引張材5,5を含む支持構造で確実に支持することが可能となる。   Further, according to the beam reinforcing method in the wooden building according to the present embodiment, the bolt attachment 8 is arranged such that the back surface of the circular pedestal 41 is brought into contact with the side surface of the existing beam 3 or the upper end side surface of the bundle material 111. The screw 52 inserted into the insertion hole 43 is screwed into the existing beam 3 and the bundle material 111 and the tensile material 5 is connected to the eye ring 51 screwed into the nut 42. And the bundle material 111 can be connected with sufficient tensile strength, and thus the vertical load from the second floor can be reliably supported by the support structure including the tensile materials 5 and 5.

本実施形態では、ボルト取付け具8及びそれに螺着されたアイリング51を介して引張材5を既存梁3の側面や束材111の上端側面に連結するようにしたが、引張材5をそれらに連結する構成は任意であって、かかる構成に代えて、公知の連結手段を適宜採用することができる。   In this embodiment, the tension member 5 is connected to the side surface of the existing beam 3 and the upper end side surface of the bundle member 111 through the bolt attachment 8 and the eye ring 51 screwed to the bolt attachment device 8. The structure to be connected to is arbitrary, and instead of such a structure, a well-known connecting means can be appropriately employed.

また、本実施形態では、上階の柱位置を避けた胴差し7の上に束材111,111を立設するようにしたが、これに代えて、該上階の柱を束材としてもよい。   Further, in the present embodiment, the bundle members 111, 111 are erected on the trunk 7 that avoids the column position on the upper floor. However, instead of this, the pillar on the upper floor may be used as the bundle member. Good.

かかる構成においては、束材を別部材としてあらたに立設する必要がなくなり、リフォーム工事の手間が省ける。   In such a configuration, it is not necessary to newly stand the bundle as a separate member, and the work of renovation work can be saved.

また、本実施形態では、既存梁3の一方の側にのみ、引張材5,5を張設するようにしたが、これに加えて、他方の側にも引張材5,5を張設するようにしてもかまわない。   Further, in this embodiment, the tension members 5 and 5 are stretched only on one side of the existing beam 3, but in addition, the tension members 5 and 5 are stretched on the other side. It doesn't matter if you do.

かかる構成によれば、既存梁3の梁軸方向から見たときの荷重の対称性が確保されることとなり、上載荷重をより確実かつ安全に支持することが可能となる。なお、本実施形態のように既存梁3の一方の側でのみ、引張材5,5を張設する構成は、既存梁3が胴差しに相当する位置、すなわち建物外周部に配置されているために背面側に引張材5,5を張設できない場合に有利な構成となる。   According to such a configuration, the symmetry of the load when viewed from the beam axis direction of the existing beam 3 is ensured, and it becomes possible to more securely and safely support the upper load. In addition, the structure which stretches the tension members 5 and 5 only on one side of the existing beam 3 as in the present embodiment is arranged at the position corresponding to the waistline, that is, the outer periphery of the building. Therefore, this is an advantageous configuration when the tension members 5 and 5 cannot be stretched on the back side.

また、本実施形態では、既存梁3の補強対策として、該既存梁の下面に添梁71を接着した上、既存梁3及び添梁71の両側面に補剛板81,81を接着するようにしたが、既存梁3の下面に添梁71の上面を接着するだけで両者の一体化を図ることができるのであれば、補剛板81を省略してもかまわない。   In the present embodiment, as a measure for reinforcing the existing beam 3, the beam 71 is bonded to the lower surface of the existing beam 3 and the stiffening plates 81 and 81 are bonded to both side surfaces of the existing beam 3 and the beam 71. However, the stiffening plate 81 may be omitted if both can be integrated by simply bonding the upper surface of the beam 71 to the lower surface of the existing beam 3.

また、本実施形態では、引張材5が設置された状況であっても、補剛板81を取り付けることができるという前提で説明したが、引張材5が邪魔で補剛板81を取り付けることが困難であり又は作業効率が悪い場合には、図9で説明したと同様、添梁71を設置した後、その下面に頂部が当接されるように支保工91を設置して該支保工で上載荷重を受け替え、しかる後、引張材5を緩めてこれを撤去してから上述と同様にして補剛板81を取り付けるようにしてもかまわない。   Further, in the present embodiment, the description has been made on the assumption that the stiffening plate 81 can be attached even when the tension member 5 is installed. However, the stiffening plate 81 may be attached due to the tension member 5 being in the way. If it is difficult or the work efficiency is poor, as described with reference to FIG. 9, after installing the beam 71, a support 91 is installed so that the top part comes into contact with the lower surface thereof. It is also possible to attach the stiffening plate 81 in the same manner as described above after changing the loading load and then loosening and removing the tension member 5.

かかる構成においては、添梁71の設置後に支保工91を設置しても何ら問題とはならないし、補剛板81を接着する段階では、既存梁3や添梁71の側方において引張材5が張設されていないため、引張材5と補剛板81とが干渉する懸念がなくなり、かくして補剛板81の接着作業をスムーズに行うことが可能となる。   In such a configuration, there is no problem even if the support 91 is installed after the beam 71 is installed, and at the stage where the stiffening plate 81 is bonded, the tensile material 5 is formed on the side of the existing beam 3 and the beam 71. Is not stretched, there is no concern that the tension member 5 and the stiffening plate 81 interfere with each other, and thus the stiffening plate 81 can be adhered smoothly.

2 撤去対象の柱
3 既存梁
4 束材
5 引張材
7 胴差し(水平横架材)
8 ボルト取付け具
41 円形台座
42 ナット(雌ネジ部)
43 挿通孔
44 開口縁部
45 溶接用開口
46 溶接
51 アイリング(ボルト部材)
71 添梁
81 補剛板
91 支保工
111 束材
2 Pillars to be removed 3 Existing beams 4 Bundles 5 Tensile materials 7 Torso (horizontal horizontal members)
8 Bolt fitting 41 Circular base 42 Nut (Female thread)
43 Insertion hole 44 Opening edge 45 Welding opening 46 Welding 51 Eyring (bolt member)
71 Beams 81 Stiffening plates 91 Supports 111 Bundles

Claims (8)

既存梁の中央近傍側面に束材を垂設して該束材の下端を前記既存梁の各端部近傍に引張材を介して連結し、該引張材に引張力を導入し、前記既存梁の下面に頂部が接合された柱を撤去し、前記既存梁の下方に添梁を設置することを特徴とする木造建築物における梁の補強方法。 A bundle member is suspended from the side surface near the center of the existing beam, the lower end of the bundle member is connected to each end portion of the existing beam via a tensile member, and a tensile force is introduced into the tensile member. A method of reinforcing a beam in a wooden building, comprising removing a column having a top part bonded to the lower surface of the frame and installing a beam below the existing beam. 前記束材を湾曲状又は折曲げ状に形成するとともにその凸側が前記既存梁の側となるように該束材を前記既存梁に垂設する請求項1記載の木造建築物における梁の補強方法。 The method of reinforcing a beam in a wooden building according to claim 1, wherein the bundle member is formed in a curved shape or a bent shape, and the bundle member is suspended from the existing beam so that a convex side thereof is on the existing beam side. . 溶接用開口が中央に形成され該溶接用開口を取り囲むように複数の挿通孔が環状に穿孔形成された円形台座と該溶接用開口の開口縁部に周縁が当接するように前記円形台座に突設された雌ネジ部とから構成され前記雌ネジ部の背面と前記開口縁部とを溶接してなるボルト取付け具を介して前記引張材を前記既存梁の各端部近傍に連結する請求項1又は請求項2記載の木造建築物における梁の補強方法。 A circular pedestal in which a plurality of insertion holes are formed in an annular shape so that a welding opening is formed in the center and surrounds the welding opening, and a peripheral edge abuts on the opening edge of the welding opening. The tension member is connected to the vicinity of each end of the existing beam through a bolt mounting tool configured by welding a back surface of the female screw portion and the opening edge portion. A method for reinforcing a beam in a wooden building according to claim 1. 既存梁の各端部近傍に束材をそれぞれ立設して該束材を前記既存梁の中央近傍に引張材を介してそれぞれ連結し、該引張材に引張力を導入し、前記既存梁の下面に頂部が接合された柱を撤去し、前記既存梁の下方に添梁を設置することを特徴とする木造建築物における梁の補強方法。 A bundle member is erected near each end of the existing beam, the bundle member is connected to the vicinity of the center of the existing beam via a tensile member, a tensile force is introduced into the tensile member, and the existing beam A method for reinforcing a beam in a wooden building, comprising removing a column whose top is joined to a lower surface and installing a beam below the existing beam. 前記既存梁の各端部近傍に立設された上階の柱を前記束材とする請求項4記載の木造建築物における梁の補強方法。 The method of reinforcing a beam in a wooden building according to claim 4, wherein an upper-floor column erected in the vicinity of each end of the existing beam is used as the bundle. 溶接用開口が中央に形成され該溶接用開口を取り囲むように複数の挿通孔が環状に穿孔形成された円形台座と該溶接用開口の開口縁部に周縁が当接するように前記円形台座に突設された雌ネジ部とから構成され前記雌ネジ部の背面と前記開口縁部とを溶接してなるボルト取付け具を介して前記引張材を前記束材の上端及び前記既存梁の中央近傍にそれぞれ連結する請求項4又は請求項5記載の木造建築物における梁の補強方法。 A circular pedestal in which a plurality of insertion holes are formed in an annular shape so that a welding opening is formed in the center and surrounds the welding opening, and a peripheral edge abuts on the opening edge of the welding opening. The tension member is formed on the upper end of the bundle member and near the center of the existing beam through a bolt fitting formed by welding a back surface of the female screw portion and the opening edge portion. The method of reinforcing a beam in a wooden building according to claim 4 or 5, wherein the beams are connected to each other. 前記添梁を設置した後、所定の補剛板を、その上部が前記既存梁の側面に当接されその下部が前記添梁の側面に当接されるように前記既存梁及び前記添梁の各側面にそれぞれ接着し、該接着に用いた接着剤が硬化した後、前記引張材に導入されている引張力を解除して該引張材を取り外す請求項1乃至請求項6のいずれか一記載の木造建築物における梁の補強方法。 After installing the beam, a predetermined stiffening plate is attached to the existing beam and the beam so that the upper part is in contact with the side surface of the existing beam and the lower part is in contact with the side surface of the beam. The adhesive according to any one of claims 1 to 6, wherein the tensile material introduced into the tensile material is released and the tensile material is removed after the adhesive is bonded to each side surface and the adhesive used for the adhesion is cured. Of reinforcing beams in wooden buildings. 前記添梁を設置した後、該添梁の下方に支保工を設置して該支保工の頂部を前記添梁の下面に当接させ、前記引張材に導入されている引張力を解除して該引張材を取り外し、所定の補剛板を、その上部が前記既存梁の側面に当接されその下部が前記添梁の側面に当接されるように前記既存梁及び前記添梁の各側面にそれぞれ接着する請求項1乃至請求項6のいずれか一記載の木造建築物における梁の補強方法。 After installing the beam, a support is installed below the beam, the top of the support is brought into contact with the lower surface of the beam, and the tensile force introduced into the tension member is released. The tension member is removed and a predetermined stiffening plate is placed on each side surface of the existing beam and the supporting beam so that an upper portion thereof is in contact with a side surface of the existing beam and a lower portion thereof is in contact with a side surface of the auxiliary beam. A method of reinforcing a beam in a wooden building according to any one of claims 1 to 6, wherein the beam is bonded to each other.
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