JP7420984B1 - How to join floor joists on floors above 2nd floor - Google Patents

How to join floor joists on floors above 2nd floor Download PDF

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JP7420984B1
JP7420984B1 JP2023010872A JP2023010872A JP7420984B1 JP 7420984 B1 JP7420984 B1 JP 7420984B1 JP 2023010872 A JP2023010872 A JP 2023010872A JP 2023010872 A JP2023010872 A JP 2023010872A JP 7420984 B1 JP7420984 B1 JP 7420984B1
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一 石川
昌悟 島村
敏男 佐藤
暁 田中
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三菱地所ホーム株式会社
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Abstract

【課題】搬送が簡便であり、かつ床材の水平を保つことができる2階以上の床における床根太の接合方法およびそれに用いられる連結金物を提供する。【解決手段】複数の平行弦トラスユニット10A,10Bを連結金物20,30を用いて平行弦トラスユニット10A,10Bの接合面10a,10a’下部が当接し、接合面10a,10a’上部が長手方向に離間した状態で長手方向に連結して山型になるように平行弦トラス根太1を構成し、建物において対向する一対の構造体3に架設した平行弦トラス根太1が水平に近づくので平行弦トラスユニット10A,10Bの接合部で谷型に折れにくく、2階以上の床材を水平に保つ。【選択図】図8An object of the present invention is to provide a method for joining floor joists in a floor of a second or higher floor that is easy to transport and can keep the flooring material level, and a connecting hardware used therein. [Solution] A plurality of parallel string truss units 10A, 10B are connected using metal fittings 20, 30, so that lower joint surfaces 10a, 10a' of the parallel string truss units 10A, 10B are in contact with each other, and upper joint surfaces 10a, 10a' are longitudinal. Parallel chord truss joists 1 are constructed so as to be connected in the longitudinal direction while being spaced apart in the direction to form a mountain shape. To prevent flooring from breaking into a valley shape at the joint of string truss units 10A and 10B, and to keep flooring on the second floor or higher level. [Selection diagram] Figure 8

Description

本発明は、木造の建物における2階以上の床における床根太の接合方法およびそれに用いられる連結金物に関する。 The present invention relates to a method for joining floor joists on floors above the second floor in a wooden building, and a connecting hardware used therein.

住宅などの木造の建物は、柱や梁などによって構成される木造軸組工法や、木材で組まれた枠組に構造用合板を張った壁、床及び天井によって構成される木造枠組壁工法(いわゆるツーバイフォー工法)などにより建築されている。このような木造の建物の2階以上の床は、一対の略平行な壁や梁等の構造体間に、複数本の床根太を架け渡し、その上に床合材や床材が貼り付けられることで一般的に構成されている。 Wooden buildings such as houses can be built using the wooden frame construction method, which consists of columns and beams, and the wooden frame wall construction method, which consists of walls, floors, and ceilings covered with structural plywood on a framework made of wood (so-called It is constructed using the two-by-four construction method. The floors on the second floor and above of such wooden buildings are constructed by spanning multiple floor joists between a pair of substantially parallel structures such as walls and beams, and floor composite materials or flooring materials are pasted on top of them. It is generally composed of

例えば、特許文献1に示される木造の建物の床梁は、左右方向に平行に延びる上弦材および下弦材と、上弦材および下弦材を垂直に連結する複数の垂直材と、上弦材および下弦材を斜めに連結する複数の斜材と、から構成される平行弦トラス根太が用いられている。この平行弦トラス根太は曲げ応力に対する強度に優れ、平行弦トラス根太の中央部分を支える耐力壁や柱を配置しなくても構造強度が確保されるため、平行弦トラス根太を架け渡すスパン長が長い場合、例えば、大きなリビングスペースを確保する場合などに適している。 For example, the floor beam of a wooden building shown in Patent Document 1 includes an upper chord member and a lower chord member extending in parallel in the left-right direction, a plurality of vertical members vertically connecting the upper chord member and the lower chord member, and an upper chord member and a lower chord member. A parallel chord truss joist is used, which consists of a plurality of diagonal members that connect diagonally. This parallel chord truss joist has excellent strength against bending stress, and structural strength is ensured without placing a load-bearing wall or column to support the central part of the parallel chord truss joist. If it is long, it is suitable, for example, when securing a large living space.

特開2015-209725号公報(第6頁、第2図)JP2015-209725A (Page 6, Figure 2)

特許文献1に示される平行弦トラス根太は、主に架け渡すスパン長が長い場合に用いられるため長尺であるが、長尺であると、上弦材および下弦材の断面が大きくなり材料費が高騰するばかりか、狭小地での建築において運搬が困難になるため、平行弦トラス根太を複数の平行弦トラスユニットに分割し、現場で長手方向に接続して平行弦トラス根太を構成する手法が採用されている。しかしながら、平行弦トラスユニット同士の接続部分に平行弦トラスユニットの自重や床材の荷重が集中するため、平行弦トラスユニット同士が谷型状に折れやすくなり、2階以上の床の床材を水平に保つことができない虞があった。 The parallel chord truss joist shown in Patent Document 1 is long because it is mainly used when the span length to be spanned is long, but if it is long, the cross sections of the upper and lower chords become large, which reduces material costs. Not only does the price rise, but it also becomes difficult to transport when building on a narrow site. Therefore, a method of dividing a parallel chord truss joist into multiple parallel chord truss units and connecting them longitudinally on site to form a parallel chord truss joist is recommended. It has been adopted. However, since the weight of the parallel string truss units and the load of the flooring concentrate at the joints between the parallel string truss units, the parallel string truss units tend to break each other in a valley shape, causing the flooring of floors above the second floor to be damaged. There was a risk that it would not be possible to keep it level.

本発明は、このような問題点に着目してなされたもので、搬送が簡便であり、かつ床材の水平を保つことができる2階以上の床における床根太の接合方法およびそれに用いられる連結金物を提供することを目的とする。 The present invention was made with attention to such problems, and provides a method for joining floor joists on floors above the second floor, which is easy to transport, and allows the flooring to be kept level, and a connection used therein. The purpose is to provide hardware.

前記課題を解決するために、本発明の2階以上の床における床根太の接合方法は、
複数の平行弦トラスユニットを、該平行弦トラスユニットの接合面下部が当接し、かつ接合面上部が長手方向に離間した状態に連結金物を用いて長手方向に連結して平行弦トラス根太を構成し、
前記平行弦トラス根太を建物において対向する一対の構造体に架設したことを特徴としている。
この特徴によれば、床根太である平行弦トラス根太を構成する複数の平行弦トラスユニットを分割した状態で搬送することができるとともに、平行弦トラス根太は、平行弦トラスユニット同士を山型に連結することで構成されていることから、平行弦トラスユニットの自重や床材の荷重により平行弦トラスユニットの接合端部同士が押し下げられたときに、平行弦トラスユニット同士が水平に近づくにつれて平行弦トラスユニットの接合面上部同士が圧接されるので平行弦トラスユニット同士が谷型に折れにくく、2階以上の床の床根太を水平に保つことができる。
In order to solve the above problems, the method for joining floor joists on floors above the second floor of the present invention is as follows:
A parallel chord truss joist is constructed by connecting a plurality of parallel string truss units in the longitudinal direction using connecting hardware with the lower joint surfaces of the parallel string truss units in contact and the upper joint surfaces separated in the longitudinal direction. death,
It is characterized in that the parallel chord truss joists are installed on a pair of opposing structures in a building.
According to this feature, the plurality of parallel chord truss units that make up the parallel chord truss joists, which are floor joists, can be transported in a divided state, and the parallel chord truss units can be arranged in a mountain shape. Since the parallel string truss units are connected together, when the joint ends of the parallel string truss units are pushed down by their own weight or the load of the flooring, the parallel string truss units become parallel as they approach each other horizontally. Since the upper joint surfaces of the string truss units are pressed against each other, the parallel string truss units are unlikely to break into a valley shape, and the floor joists of the floors above the second floor can be kept horizontal.

隣接する前記トラスユニットの下弦材同士に渡って配設される連結金物として上向きコ字状の下部連結金物が用いられることを特徴としている。
この特徴によれば、下部連結金物の底板によりトラスユニットの接合面下部が位置決めされるとともに、トラスユニットの接合面下部同士がそれ以上下方に下がることが規制される。
The present invention is characterized in that an upwardly U-shaped lower connecting hardware is used as the connecting hardware disposed across the lower chord members of the adjacent truss units.
According to this feature, the lower joint surfaces of the truss unit are positioned by the bottom plate of the lower connecting hardware, and the lower joint surfaces of the truss units are restricted from moving further downward.

隣接する前記トラスユニット同士の上弦材の側面に沿って配設される連結金物としてプレート状の上部連結金物が用いられることを特徴としている。
この特徴によれば、上弦材の上面よりも上方に上部連結金物が張り出さないようにできるため、上弦材の上面に床材を貼り付けやすい。
The present invention is characterized in that a plate-shaped upper connecting hardware is used as the connecting hardware disposed along the side surface of the upper chord of the adjacent truss units.
According to this feature, the upper connecting hardware can be prevented from protruding above the upper surface of the upper chord member, making it easier to attach the flooring material to the upper surface of the upper chord member.

本発明の実施例における2階以上の床における床根太の接合方法を用いた建物を示す斜視図である。FIG. 2 is a perspective view showing a building using the method for joining floor joists on floors above the second floor according to an embodiment of the present invention. 建物を示す分解斜視図である。It is an exploded perspective view showing a building. 本発明の実施例における連結金物を用いた平行弦トラス根太を示す正面図である。FIG. 2 is a front view showing a parallel chord truss joist using connecting hardware in an embodiment of the present invention. 平行弦トラスユニットの接続端部を示す分解斜視図である。FIG. 3 is an exploded perspective view showing a connecting end of the parallel chord truss unit. (a)は上部連結金物を示す正面図、(b)は(a)のA-A断面図、(c)は上部連結金物における一方の貫通孔を示す概略図である。(a) is a front view showing the upper connecting hardware, (b) is a sectional view taken along the line AA in (a), and (c) is a schematic diagram showing one through hole in the upper connecting hardware. (a)は下部連結金物を示す正面図、(b)は(a)のB-B断面図、(c)は下部連結金物における一方の貫通孔を示す概略図である。(a) is a front view showing the lower connecting hardware, (b) is a sectional view taken along the line BB in (a), and (c) is a schematic diagram showing one through hole in the lower connecting hardware. (a)は中部連結金物を示す正面図、(b)は(a)のC-C断面図である。(a) is a front view showing the middle connecting hardware, and (b) is a sectional view taken along line CC in (a). (a)は山型状の平行弦トラス根太を架設した状態を示す概略図、(b)は(a)の囲み部の概略図である。(a) is a schematic diagram showing a state in which chevron-shaped parallel chord truss joists are installed, and (b) is a schematic diagram of the enclosed portion in (a). トラスユニットの接合部が押し下げられた状態を示す概略図、(b)は(a)の囲み部の概略図である。A schematic diagram showing a state in which the joint portion of the truss unit is pressed down, and (b) is a schematic diagram of the enclosed portion in (a).

本発明に係る2階以上の床における床根太の接合方法およびそれを実施するための形態を実施例に基づいて以下に説明する。 A method for joining floor joists for floors on the second floor or higher according to the present invention and a form for implementing the method will be described below based on examples.

実施例に係る2階以上の床における床根太の接合方法およびそれに用いられる連結金物につき、図1から図9を参照して説明する。以下、図3の紙面手前側を床根太である平行弦トラス根太の正面側(前方側)とし、平行弦トラス根太を正面から見た左右を平行弦トラス根太の左右側として説明する。 A method of joining floor joists for floors on the second floor or higher and a connecting hardware used therein according to an embodiment will be described with reference to FIGS. 1 to 9. Hereinafter, the front side of the paper in FIG. 3 will be referred to as the front side (front side) of the parallel chord truss joist, which is the floor joist, and the left and right sides of the parallel chord truss joist when viewed from the front will be referred to as the left and right sides of the parallel chord truss joist.

図2に示されるように、平行弦トラス根太1は、例えば、戸建て住宅やアパートなどの建物構造において、2階以上の床の床組を構成する床根太であって、本実施例においては2階建ての建物2に適用される。尚、本実施例の建物2は、2階建てである形態を例示するが、3階建て以上の建物であってもよい。 As shown in FIG. 2, the parallel chord truss joist 1 is, for example, a floor joist that constitutes the floor assembly of the second floor or higher floor in a building structure such as a detached house or an apartment, and in this embodiment, the parallel chord truss joist 1 is a Applicable to 2-story building. Although the building 2 in this embodiment is a two-story building, it may be a three-story building or more.

図1及び図2に示されるように、本実施例の建物2は、木材で組まれた枠組に構造用合板を張った壁、床及び天井によって構成される木造枠組壁工法(いわゆるツーバイフォー工法)により建築されている。 As shown in FIGS. 1 and 2, the building 2 of this embodiment is constructed using the wooden frame wall construction method (so-called two-by-four construction method), which is constructed of walls, floors, and ceilings in which structural plywood is attached to a framework made of wood. It is built by.

この建物2は、基礎Fと、1階部分の側壁を構成する複数の構造壁3と、1階部分の床材4と、2階部分の床組を構成する複数の平行弦トラス根太1と、2階部分の床材5と、2階部分の側壁を構成する複数の構造壁6と、屋根7と、から主に構成されている。 This building 2 includes a foundation F, a plurality of structural walls 3 forming the side walls of the first floor, flooring 4 of the first floor, and a plurality of parallel chord truss joists 1 forming the floor assembly of the second floor. , a floor material 5 for the second floor, a plurality of structural walls 6 forming side walls of the second floor, and a roof 7.

具体的には、基礎Fの上方には、複数の構造壁3が立設して配置されている。1階部分の構造壁3の上端には左右方向に延びる平行弦トラス根太1が前後方向に複数並んだ状態で固定されているとともに、構造壁3の上方に2階部分の構造壁6が立設されている。複数の平行弦トラス根太1の上方には床材5が貼り付けられている。また、屋根7は、2階部分の構造壁6の上方に複数並んで配置された図示しない屋根トラスまたは垂木に屋根材を固定することで構成されている。 Specifically, above the foundation F, a plurality of structural walls 3 are arranged upright. A plurality of parallel chord truss joists 1 extending in the left-right direction are fixed to the upper end of the structural wall 3 on the first floor in a state in which they are lined up in the front-rear direction, and a structural wall 6 on the second floor is erected above the structural wall 3. It is set up. A floor material 5 is pasted above the plurality of parallel chord truss joists 1. The roof 7 is constructed by fixing roofing materials to a plurality of roof trusses or rafters (not shown) arranged in a row above the structural wall 6 of the second floor.

尚、本実施例では、構造壁3の内側面に平行弦トラス根太1が固定される形態を例示したが、構造壁3の上面に平行弦トラス根太1を固定し、平行弦トラス根太1の上面に貼り付けられている床材5の上面に構造壁6を立設させるようにしてもよい。この場合、平行弦トラス根太1の外側を外壁材で被覆すればよい。 In this embodiment, the parallel chord truss joist 1 is fixed to the inner surface of the structural wall 3, but the parallel chord truss joist 1 is fixed to the upper surface of the structural wall 3, and the parallel chord truss joist 1 The structural wall 6 may be erected on the upper surface of the flooring material 5 attached to the upper surface. In this case, the outside of the parallel chord truss joist 1 may be covered with an exterior wall material.

構造壁3,6は、例えば、幅38mm、厚さが89mmの木材で組まれた枠組に構造用合板を貼った壁で構成されており、左右方向または前後方向に並設されることにより建物2の側壁を構成している。また、一部の構造壁3及び構造壁6には、窓枠8が設置される。尚、窓枠8に代えて、構造壁3同士及び構造壁6同士が離間した部位を開口としてもよいし、窓枠8に代えて他の構造部材を配置してもよい。 The structural walls 3 and 6 are, for example, walls with structural plywood attached to a frame made of wood with a width of 38 mm and a thickness of 89 mm, and are installed side by side in the left-right direction or the front-back direction to improve the structure of the building. It constitutes the second side wall. Furthermore, window frames 8 are installed on some of the structural walls 3 and 6. In addition, instead of the window frame 8, a portion where the structural walls 3 and the structural walls 6 are spaced apart from each other may be used as an opening, or instead of the window frame 8, another structural member may be arranged.

図3に示されるように、平行弦トラス根太1は、平行弦トラスユニットとしての2つのトラスユニット10A,10Bを上部連結金物20、下部連結金物30、中部連結金物40、およびボルトナット9により左右方向に連結することで構成されている。 As shown in FIG. 3, the parallel string truss joist 1 connects two truss units 10A and 10B as parallel string truss units by upper connecting hardware 20, lower connecting hardware 30, middle connecting hardware 40, and bolts and nuts 9. It is constructed by connecting in the direction.

トラスユニット10Aは、左右方向に延び上下に離間して平行に配置される上弦材11および下弦材12と、上弦材11および下弦材12を垂直に連結する複数の垂直材13(本実施例では7本)と、上弦材11および下弦材12を斜めに連結する複数の斜材14(本実施例では8本)と、から構成されている。トラスユニット10Aを構成する各部材は、接続金具15により連結されている(図4参照)。 The truss unit 10A includes an upper chord member 11 and a lower chord member 12 which extend in the left-right direction and are vertically spaced apart and arranged in parallel, and a plurality of vertical members 13 (in this embodiment, which vertically connect the upper chord member 11 and the lower chord member 12). 7) and a plurality of diagonal members 14 (eight in this embodiment) that diagonally connect the upper chord member 11 and the lower chord member 12. Each member constituting the truss unit 10A is connected by a connecting fitting 15 (see FIG. 4).

トラスユニット10Bは、左右方向に延び上下に離間して平行に配置される上弦材11’および下弦材12’と、上弦材11’および下弦材12’を垂直に連結する複数の垂直材13’(本実施例では7本)と、上弦材11’および下弦材12’を斜めに連結する複数の斜材14’(本実施例では8本)と、から構成されている。トラスユニット10Bを構成する各部材は、接続金具15により連結されている(図4参照)。 The truss unit 10B includes an upper chord member 11' and a lower chord member 12' that extend in the left-right direction and are vertically spaced apart and arranged in parallel, and a plurality of vertical members 13' that vertically connect the upper chord member 11' and the lower chord member 12'. (7 pieces in this embodiment) and a plurality of diagonal members 14' (8 pieces in this embodiment) that diagonally connect the upper chord member 11' and the lower chord member 12'. Each member constituting the truss unit 10B is connected by a connecting fitting 15 (see FIG. 4).

図4に示されるように、トラスユニット10Aにおける上弦材11の右端部(トラスユニット10B側の端部)には、前後方向に貫通する貫通孔11aが左右方向に離間して3つ設けられている。これら貫通孔11aは、上弦材11の延設方向と平行に並んでいる。 As shown in FIG. 4, three through holes 11a passing through in the front-rear direction are provided at the right end (end on the truss unit 10B side) of the upper chord member 11 in the truss unit 10A, spaced apart in the left-right direction. There is. These through holes 11a are arranged parallel to the extending direction of the upper chord member 11.

また、トラスユニット10Aにおける下弦材12の右端部にも同様に、前後方向に貫通する貫通孔12aが左右方向に離間して3つ設けられている。これら貫通孔12aは、下弦材12の延設方向と平行に並んでいる。 Similarly, three through holes 12a penetrating in the front-rear direction are provided at the right end portion of the lower chord member 12 in the truss unit 10A, spaced apart in the left-right direction. These through holes 12a are arranged parallel to the extending direction of the lower chord member 12.

トラスユニット10Aにおける上弦材11と下弦材12の右端部同士を連結する垂直材13には、前後方向に貫通する貫通孔13aが上下方向に離間して2つ設けられている。これら貫通孔11a、12a,13aは、ボルトナット9のボルト軸よりも大径に形成されている。 The vertical member 13 that connects the right end portions of the upper chord member 11 and the lower chord member 12 in the truss unit 10A is provided with two through holes 13a that penetrate in the front-back direction and are spaced apart in the vertical direction. These through holes 11a, 12a, 13a are formed to have a larger diameter than the bolt shaft of the bolt nut 9.

また、上弦材11、下弦材12、垂直材13の各右端面は、面一に形成されており、トラスユニット10B側に面する接合面10aを構成している。 Further, the right end surfaces of the upper chord member 11, the lower chord member 12, and the vertical member 13 are formed flush with each other, and constitute a joint surface 10a facing the truss unit 10B side.

トラスユニット10Bにおける上弦材11’の左端部(トラスユニット10A側の端部)には、前後方向に貫通する貫通孔11a’が左右方向に離間して3つ設けられている。これら貫通孔11a’は、上弦材11’の延設方向と平行に並んでいる。 At the left end (the end on the truss unit 10A side) of the upper chord member 11' in the truss unit 10B, three through holes 11a' penetrating in the front-rear direction are provided spaced apart in the left-right direction. These through holes 11a' are arranged parallel to the extending direction of the upper chord member 11'.

また、トラスユニット10Bにおける下弦材12’の右端部にも同様に、前後方向に貫通する貫通孔12a’が左右方向に離間して3つ設けられている。これら貫通孔12a’は、下弦材12’の延設方向と平行に並んでいる。 Further, three through holes 12a' penetrating in the front-rear direction are similarly provided at the right end portion of the lower chord member 12' in the truss unit 10B, spaced apart in the left-right direction. These through holes 12a' are arranged parallel to the extending direction of the lower chord member 12'.

トラスユニット10Bにおける上弦材11’と下弦材12’の左端部同士を連結する垂直材13’には、前後方向に貫通する貫通孔13a’が上下方向に離間して2つ設けられている。これら貫通孔11a’、12a’,13a’は、ボルトナット9のボルト軸よりも大径に形成されている。 A vertical member 13' that connects the left end portions of the upper chord member 11' and the lower chord member 12' in the truss unit 10B is provided with two through holes 13a' that penetrate in the front-back direction and are spaced apart in the vertical direction. These through holes 11a', 12a', and 13a' are formed to have a larger diameter than the bolt shaft of the bolt nut 9.

また、上弦材11’、下弦材12’、垂直材13’の各右端面は、面一に形成されており、トラスユニット10A側に面する接合面10a’を構成している。 Further, the right end surfaces of the upper chord member 11', the lower chord member 12', and the vertical member 13' are formed flush with each other, and constitute a joint surface 10a' facing the truss unit 10A side.

上部連結金物20は、上弦材11,11’の前面と後面とに沿ってそれぞれ配置されている。上弦材11,11’同士は、前後の上部連結金物20,20と、上弦材11,11’の各貫通孔11a,11a’に挿通されるボルトナット9により左右方向に接続されている。 The upper connecting hardware 20 is arranged along the front and rear surfaces of the upper chord members 11 and 11', respectively. The upper chord members 11, 11' are connected in the left-right direction by front and rear upper connecting hardware 20, 20, and bolts and nuts 9 inserted through through holes 11a, 11a' of the upper chord members 11, 11'.

具体的には、図5に示されるように、上部連結金物20は、プレート状をなす金属板であって、上弦材11において最も左側に位置する貫通孔11aに対応する貫通孔21と、上弦材11において中央に位置する貫通孔11aに対応する貫通孔22と、上弦材11において最も右側に位置する貫通孔11aに対応する貫通孔23と、上弦材11’において最も右側に位置する貫通孔11a’に対応する貫通孔21’と、上弦材11’において中央に位置する貫通孔11a’に対応する貫通孔22’と、上弦材11’において最も左側に位置する貫通孔11a’に対応する貫通孔23’と、を備えている。上部連結金物20における各貫通孔は、ボルトナット9のボルト軸と同径となっている。 Specifically, as shown in FIG. 5, the upper connecting hardware 20 is a plate-shaped metal plate, and includes a through hole 21 corresponding to the through hole 11a located on the leftmost side of the upper chord member 11, and a through hole 21 corresponding to the through hole 11a located on the leftmost side of the upper A through hole 22 corresponding to the through hole 11a located in the center of the material 11, a through hole 23 corresponding to the rightmost through hole 11a in the upper chord material 11, and a through hole located most right in the upper chord material 11'. 11a', a through hole 22' corresponding to the centrally located through hole 11a' in the upper chord member 11', and a through hole 11a' located on the leftmost side in the upper chord member 11'. A through hole 23' is provided. Each through hole in the upper connecting hardware 20 has the same diameter as the bolt axis of the bolt nut 9.

一方のボルト孔である貫通孔21,22,23は、上部連結金物20の左右中央に向かうにつれて高い位置になるように並んで配置されている。他方のボルト孔である貫通孔21’,22’,23’も同様に、上部連結金物20の左右中央に向かうにつれて高い位置になるように並んで配置されている。尚、図5(c)では、わかりやすく説明するために、貫通孔21,22,23の上下位置の相対的なずれを実際よりも大きく図示している。 The through holes 21, 22, and 23, which are one of the bolt holes, are arranged side by side so that the positions become higher toward the left and right center of the upper connecting hardware 20. The through holes 21', 22', and 23', which are the other bolt holes, are similarly arranged side by side so that the positions become higher toward the left and right center of the upper connecting hardware 20. In addition, in FIG. 5(c), in order to explain it clearly, the relative displacement of the vertical position of the through-holes 21, 22, and 23 is shown larger than it actually is.

これら貫通孔21,22,23と貫通孔21’,22’,23’とは、上部連結金物20の左右中央を通る仮想線Xを基準として左右対称の位置に設けられている。 These through holes 21, 22, 23 and through holes 21', 22', 23' are provided at symmetrical positions with respect to an imaginary line X passing through the left and right center of the upper connecting hardware 20.

図4に戻って、下部連結金物30は、下弦材12,12’に渡って下方から嵌合される上向きコ字状をなしている。具体的には、図6に示されるように、下部連結金物30は、金属板を上向きコ字状に折り曲げることにより構成されており、底板30Aと、底板30Aの前端から立ち上がる前板30Bと、底板30Aの後端から立ち上がる後板30Cと、を備えている。前板30B及び後板30Cは底板30Aの左右端部から左右方向に張り出している。言い換えれば、下部連結金物30の左右端部には、底板30Aが切り欠かれた切欠き部34,34が形成されている。 Returning to FIG. 4, the lower connecting hardware 30 has an upward U-shape that is fitted from below across the lower chord members 12, 12'. Specifically, as shown in FIG. 6, the lower connecting hardware 30 is constructed by bending a metal plate upward into a U-shape, and includes a bottom plate 30A, a front plate 30B rising from the front end of the bottom plate 30A, A rear plate 30C stands up from the rear end of the bottom plate 30A. The front plate 30B and the rear plate 30C extend in the left-right direction from the left and right ends of the bottom plate 30A. In other words, cutouts 34, 34 are formed in the left and right ends of the lower connecting hardware 30 by cutting out the bottom plate 30A.

前板30B及び後板30Cには、下弦材12において最も左側に位置する貫通孔12aに対応する貫通孔31と、下弦材12において中央に位置する貫通孔12aに対応する貫通孔32と、下弦材12において最も右側に位置する貫通孔12aに対応する貫通孔33と、下弦材12’において最も右側に位置する貫通孔12a’に対応する貫通孔31’と、下弦材12’において中央に位置する貫通孔12a’に対応する貫通孔32’と、下弦材12’において最も左側に位置する貫通孔12a’に対応する貫通孔33’と、を備えている。下部連結金物30における各貫通孔は、ボルトナット9のボルト軸と同径となっている。 The front plate 30B and the rear plate 30C have a through hole 31 corresponding to the through hole 12a located on the leftmost side in the lower chord material 12, a through hole 32 corresponding to the through hole 12a located in the center of the lower chord material 12, and a through hole 32 corresponding to the through hole 12a located in the center of the lower chord material 12. A through hole 33 corresponding to the rightmost through hole 12a in the material 12, a through hole 31' corresponding to the rightmost through hole 12a' in the lower chord 12', and a through hole 31' located in the center of the lower chord 12'. and a through hole 33' corresponding to the through hole 12a' located on the leftmost side of the lower chord member 12'. Each through hole in the lower connecting hardware 30 has the same diameter as the bolt axis of the bolt nut 9.

一方のボルト孔である貫通孔31,32,33は、下部連結金物30の左右中央に向かうにつれて高い位置になるように並んで配置されている。他方のボルト孔である貫通孔31’,32’,33’も同様に、下部連結金物30の左右中央に向かうにつれて高い位置になるように並んで配置されている。尚、図6(c)では、わかりやすく説明するために、貫通孔31,32,33の上下位置の相対的なずれを実際よりも大きく図示している。 The through holes 31, 32, and 33, which are one of the bolt holes, are arranged side by side so that the positions become higher toward the left and right center of the lower connecting hardware 30. The other bolt holes, ie, the through holes 31', 32', and 33', are similarly arranged side by side so that the positions become higher toward the left and right center of the lower connecting hardware 30. In addition, in FIG. 6(c), in order to explain the explanation clearly, the relative shift in the vertical position of the through holes 31, 32, 33 is illustrated to be larger than in reality.

これら貫通孔31,32,33と貫通孔31’,32’,33’とは、下部連結金物30の左右中央を通る仮想線Yを基準として左右対称の位置に設けられている。 These through holes 31, 32, 33 and through holes 31', 32', 33' are provided at symmetrical positions with respect to an imaginary line Y passing through the left and right center of the lower connecting hardware 30.

図4に戻って、中部連結金物40は、トラスユニット10Aの右端部に配置される垂直材13およびトラスユニット10Bの左端部に配置される垂直材13’の前面と後面とに沿ってそれぞれ配置されている。垂直材13,13’同士は、前後の中部連結金物40,40と、垂直材13,13’の各貫通孔13a,13a’に挿通されるボルトナット9により左右方向に接続されている。 Returning to FIG. 4, the middle connecting hardware 40 is arranged along the front and rear surfaces of the vertical member 13 located at the right end of the truss unit 10A and the vertical member 13' located at the left end of the truss unit 10B. has been done. The vertical members 13, 13' are connected in the left-right direction by front and rear intermediate connecting hardware 40, 40, and bolts and nuts 9 inserted through through holes 13a, 13a' of the vertical members 13, 13'.

具体的には、図7に示されるように、中部連結金物40は、プレート状をなす金属板であって、垂直材13の貫通孔13aに対応する貫通孔41と、垂直材13’の貫通孔13a’に対応する貫通孔41’と、を備えている。上方の貫通孔41,41’同士、下方の貫通孔41,41’同士は同じ高さに配設されている。各貫通孔は、ボルトナット9のボルト軸と同径となっている。 Specifically, as shown in FIG. 7, the middle connecting hardware 40 is a plate-shaped metal plate, and has a through hole 41 corresponding to the through hole 13a of the vertical member 13, and a through hole 41 corresponding to the through hole 13a of the vertical member 13'. A through hole 41' corresponding to the hole 13a' is provided. The upper through holes 41, 41' and the lower through holes 41, 41' are arranged at the same height. Each through hole has the same diameter as the bolt shaft of the bolt nut 9.

次いで、2階部分の床材5を貼り付ける手順について説明する。先ず、工場等で組み立てたトラスユニット10A,10Bを建築現場に搬送し、建築現場にてトラスユニット10A,10Bを上部連結金物20、下部連結金物30、中部連結金物40、およびボルトナット9により左右方向に連結して平行弦トラス根太1を組み立てる。 Next, a procedure for attaching the flooring material 5 for the second floor will be explained. First, the truss units 10A, 10B assembled at a factory or the like are transported to a construction site, and the truss units 10A, 10B are connected to the left and right by the upper connecting hardware 20, the lower connecting hardware 30, the middle connecting hardware 40, and the bolts and nuts 9 at the construction site. Parallel chord truss joist 1 is assembled by connecting in the direction.

前述のように、上部連結金物20の貫通孔21~23,21’~23’と、下部連結金物30の貫通孔31~33,31’~33’とは、左右中央に向かうにつれて高い位置になるように並んで配置されているため、トラスユニット10A,10Bを接続すると、図8(a)に示されるように、トラスユニット10A,10Bが正面視山型状に連結される。トラスユニット10A,10Bが連結された状態にあっては、トラスユニット10A,10Bの接合面10a,10a’の下部同士が当接し、接合面10a,10a’の上部同士が左右方向に離間した状態となっている。 As mentioned above, the through holes 21 to 23, 21' to 23' of the upper connecting hardware 20 and the through holes 31 to 33, 31' to 33' of the lower connecting hardware 30 are located at higher positions toward the left and right center. Therefore, when the truss units 10A and 10B are connected, the truss units 10A and 10B are connected in a mountain shape when viewed from the front, as shown in FIG. 8(a). When the truss units 10A and 10B are connected, the lower parts of the joint surfaces 10a and 10a' of the truss units 10A and 10B are in contact with each other, and the upper parts of the joint surfaces 10a and 10a' are separated from each other in the left-right direction. It becomes.

詳しくは、図8(b)に示されるように、ボルトナット9のボルト軸は、該ボルト軸よりも大径に形成された貫通孔11aに対して相対的に右側に寄せて配置されている。尚、図示しないが、ボルトナット9のボルト軸は、貫通孔12a,13aに対しても相対的に右側に寄せて配置されているとともに、貫通孔11a’,12a’,13a’に対して相対的に左側に寄せて配置されている。 Specifically, as shown in FIG. 8(b), the bolt shaft of the bolt nut 9 is arranged to the right side relative to the through hole 11a, which is formed to have a larger diameter than the bolt shaft. . Although not shown, the bolt shaft of the bolt nut 9 is arranged to the right side relative to the through holes 12a and 13a, and is also located relatively to the right side with respect to the through holes 11a', 12a' and 13a'. It is placed on the left side.

下部連結金物30は、上向きコ字状をなし、下弦材12,12’に渡って下方から嵌合されているため、底板30Aによりトラスユニット10A,10Bの接合面10a,10a’の下部の上下位置が位置決めされるとともに、前板30B及び後板30Cにより下弦材12,12’の前後のずれを抑制できる。 The lower connecting hardware 30 has an upward U-shape and is fitted from below across the lower chord members 12, 12'. In addition to being positioned, the front plate 30B and the rear plate 30C can suppress the front and back displacement of the lower chord members 12, 12'.

さらに下部連結金物30の左右端部には、底板30Aが切り欠かれた切欠き部34,34が形成されているため、トラスユニット10A,10Bを正面視山型状に連結したときに、接合面10a,10a’の下部が底板30Aから上方に大きく離間することを抑えることができる。 Furthermore, notches 34, 34, which are formed by cutting out the bottom plate 30A, are formed at the left and right ends of the lower connecting hardware 30, so that when the truss units 10A, 10B are connected in a chevron shape when viewed from the front, the joint It is possible to prevent the lower portions of the surfaces 10a and 10a' from separating upwardly from the bottom plate 30A.

また、トラスユニット10A,10Bが正面視山型に連結された状態にあっては、上部連結金物20は、上弦材11,11’の上面11b,11b’よりも下方に配置される。すなわち、上弦材11,11’の上面11b,11b’よりも上方に上部連結金物20が張り出さないようにできるため、上弦材11,11’の上面11b,11b’に床材5を貼り付けやすい。 Further, when the truss units 10A and 10B are connected in a mountain shape when viewed from the front, the upper connecting hardware 20 is disposed below the upper surfaces 11b and 11b' of the upper chord members 11 and 11'. That is, in order to prevent the upper connecting hardware 20 from protruding above the upper surfaces 11b, 11b' of the upper chord members 11, 11', the flooring material 5 is attached to the upper surfaces 11b, 11b' of the upper chord members 11, 11'. Cheap.

また、上部連結金物20の貫通孔21,22,23と貫通孔21’,22’,23’とは、左右対称の位置に設けられており、下部連結金物30の貫通孔31,32,33と貫通孔31’,32’,33’とは、左右対称の位置に設けられているため、左右対称にトラスユニット10A,10Bをバランスよく連結することができる。 Further, the through holes 21, 22, 23 of the upper connecting hardware 20 and the through holes 21', 22', 23' are provided in symmetrical positions, and the through holes 31, 32, 33 of the lower connecting hardware 30 are provided in symmetrical positions. Since the through holes 31', 32', and 33' are provided at symmetrical positions, the truss units 10A and 10B can be connected symmetrically and in a well-balanced manner.

次いで、図2を参照して、正面視山型状に連結された平行弦トラス根太1を、1階部分において左右方向に対向する構造壁3の上端に前後方向に複数並べて架設する。その後、架設された複数の平行弦トラス根太1の上面に2階部分の床材5を貼り付ける。 Next, referring to FIG. 2, a plurality of parallel chord truss joists 1 connected in a mountain-like shape when viewed from the front are installed in a row in the front-rear direction at the upper ends of the structural walls 3 that face each other in the left-right direction on the first floor. Thereafter, the flooring material 5 for the second floor portion is pasted on the upper surface of the plurality of parallel chord truss joists 1 that have been constructed.

トラスユニット10A,10Bには、トラスユニット10A,10Bの自重や床材5の荷重等によりトラスユニット10A,10Bの接合端部同士を押し下げる方向に力が作用する。トラスユニット10A,10Bの接合端部同士を押し下げる方向に力が作用すると、図9(a)に示されるように、トラスユニット10A,10B同士が水平に近づくように相対移動する。 A force acts on the truss units 10A, 10B in a direction that pushes down the joined ends of the truss units 10A, 10B due to the weight of the truss units 10A, 10B, the load of the floor material 5, etc. When a force acts in a direction that pushes down the joined ends of the truss units 10A and 10B, the truss units 10A and 10B move relative to each other so as to approach each other horizontally, as shown in FIG. 9(a).

トラスユニット10A,10Bは正面視山型状に連結されているため、トラスユニット10A,10B同士が水平に近づくにつれて接合面10a,10a’の上部同士が圧接される。これによりトラスユニット10A,10B同士が正面視谷型状に折れにくく、2階の床材5を水平に保つことができる。 Since the truss units 10A and 10B are connected in a mountain shape when viewed from the front, the upper portions of the joint surfaces 10a and 10a' are pressed against each other as the truss units 10A and 10B become horizontal. This makes it difficult for the truss units 10A and 10B to break into a valley shape when viewed from the front, and it is possible to maintain the flooring 5 on the second floor horizontally.

また、図9(b)に示されるように、ボルトナット9のボルト軸は、貫通孔11aに対して左側に寄せて配置されるようになる。尚、図示しないが、ボルトナット9のボルト軸は、貫通孔12a,13aに対しても左側に寄せて配置されるとともに、貫通孔11a’,12a’,13a’に対して右側に寄せて配置されるようになる。 Further, as shown in FIG. 9(b), the bolt shaft of the bolt nut 9 is arranged to be shifted to the left side with respect to the through hole 11a. Although not shown, the bolt shaft of the bolt nut 9 is also arranged to the left side with respect to the through holes 12a and 13a, and also to the right side with respect to the through holes 11a', 12a', and 13a'. will be done.

詳しくは、このとき、各ボルトナット9は、上弦材11,11’と上部連結金物20との間、下弦材12,12’と下部連結金物30との間、垂直材13,13’と中部連結金物40との間でせん断方向に狭持されるので、トラスユニット10A,10Bが正面視谷型状に折れることが規制される(図9(b)参照)。すなわち、トラスユニット10A,10Bが略水平をなすときには、トラスユニット10A,10Bに設けられる各貫通孔とボルトナット9のボルト軸との隙間がほとんどなくなるため、トラスユニット10A,10Bを水平に接続することができる。 Specifically, at this time, each bolt nut 9 is connected between the upper chord members 11, 11' and the upper connecting hardware 20, between the lower chord members 12, 12' and the lower connecting hardware 30, and between the vertical members 13, 13' and the middle part. Since the truss units 10A and 10B are sandwiched in the shearing direction with the connecting hardware 40, the truss units 10A and 10B are prevented from folding into a valley shape when viewed from the front (see FIG. 9(b)). That is, when the truss units 10A, 10B are substantially horizontal, there is almost no gap between each through hole provided in the truss units 10A, 10B and the bolt shaft of the bolt nut 9, so the truss units 10A, 10B are connected horizontally. be able to.

加えて、トラスユニット10A,10Bの接合端部同士を押し下げる方向に力が作用したときには、下部連結金物30の底板30Aによりトラスユニット10A,10Bの接合面10a,10a’の下部同士がそれ以上、下方に下がることが規制される。 In addition, when a force acts in a direction that pushes down the joint ends of the truss units 10A and 10B, the bottom plate 30A of the lower connecting hardware 30 pushes the lower parts of the joint surfaces 10a and 10a' of the truss units 10A and 10B further together. It is restricted from falling downward.

このように、平行弦トラス根太1をトラスユニット10A,10Bとして長手方向に分割できるため、狭小地での建築においても運搬が簡便であるとともに、上弦材11,11’および下弦材12,12’の長さを短くでき、材料費を抑えることができる。また、トラスユニット10A,10B同士が谷型状に折れることを防止できるため、トラスユニット10A,10Bの接続端部の下方に耐力壁や柱を配置しなくてもよいため、1階に大きなリビングスペースを確保することができる。 In this way, since the parallel chord truss joist 1 can be divided into the truss units 10A and 10B in the longitudinal direction, it is easy to transport even in construction on narrow spaces, and the upper chord members 11, 11' and the lower chord members 12, 12' The length can be shortened and material costs can be reduced. Additionally, since it is possible to prevent the truss units 10A and 10B from breaking into a valley shape, there is no need to place load-bearing walls or pillars below the connecting ends of the truss units 10A and 10B. Space can be secured.

以上、本発明の実施例を図面により説明してきたが、具体的な構成はこれら実施例に限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。 Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and any changes or additions that do not depart from the gist of the present invention are included in the present invention. It will be done.

例えば、前記実施例では、木造枠組壁工法により建築される建物の床組に平行弦トラス根太を用いる例に説明したが、木造軸組工法により建築される建物の床組に平行弦トラス根太を用いてもよい。 For example, in the above embodiment, parallel chord truss joists are used in the flooring of a building constructed using the wooden frame wall construction method. May be used.

また、前記実施例では、平行弦トラス根太が2つの平行弦トラスユニットに分割された形態を例示したが、平行弦トラス根太が3つ以上の平行弦トラスユニットにより構成されていてもよい。 Further, in the above embodiment, the parallel chord truss joist is divided into two parallel chord truss units, but the parallel chord truss joist may be composed of three or more parallel chord truss units.

また、前記実施例では、上部連結金物20、下部連結金物30、中部連結金物40を用いて平行弦トラスユニットを連結する形態を例示したが、上部連結金物または下部連結金物の一方のみで連結されていてもよく、中部連結金物を省略してもよい。また、連結金物は平行弦トラスユニットの前面または後面の一方にのみ沿って設けられていてもよいが、接続強度の観点から前後両面に配置されることが望ましい。 Further, in the above embodiment, the parallel chord truss units are connected using the upper connecting hardware 20, the lower connecting hardware 30, and the middle connecting hardware 40, but it is not possible to connect the parallel chord truss units with only one of the upper connecting hardware or the lower connecting hardware. The middle connecting hardware may be omitted. Furthermore, although the connecting hardware may be provided only along one of the front or rear surfaces of the parallel chord truss unit, it is desirable to provide it on both the front and rear surfaces from the viewpoint of connection strength.

また、前記実施例では、平行弦トラス根太が左右に対向する一対の構造壁に架設される形態を例示したが、これに限られず、平行弦トラス根太は、建物において対向する一対の根太などの構造体に架設されてもよい。 Further, in the above embodiment, the parallel chord truss joists are installed on a pair of structural walls facing each other on the left and right, but the parallel chord truss joists are not limited to this, and the parallel chord truss joists can be installed on a pair of joists facing each other in a building. It may also be installed on a structure.

また、前記実施例では、平行弦トラス根太が前後方向に離間して複数配置される形態を例示したが、各平行弦トラス根太が前後方向に延びる接続材により接続されていてもよい。 Further, in the above embodiment, a plurality of parallel chord truss joists are arranged spaced apart in the front-rear direction, but each parallel chord truss joist may be connected by a connecting member extending in the front-rear direction.

また、前記実施例では、平行弦トラスユニットの接続端部に垂直材が配設される形態を例示したが、平行弦トラスユニットの接続端部に垂直材が配設されていなくてもよい。この場合、上部連結金物を上向きコ字状に構成してもよい。 Further, in the above embodiment, a vertical member is provided at the connecting end of the parallel string truss unit, but the vertical member may not be provided at the connecting end of the parallel string truss unit. In this case, the upper connecting hardware may be configured in an upward U-shape.

1 平行弦トラス根太(床根太)
3 構造壁(一対の構造体)
5 床材
9 ボルトナット(連結金具)
10A,10B トラスユニット(平行弦トラスユニット)
10a,10a’ 接合面
11,11’ 上弦材
11a,11a’ 貫通孔
12,12’ 下弦材
12a,12a’ 貫通孔
13,13’ 垂直材
14,14’ 斜材
20 上部連結金物(連結金具)
21~23 貫通孔(一方のボルト孔)
21’~23’ 貫通孔(他方のボルト孔)
30 下部連結金物(連結金具)
30A 底板
30B 前板
30C 後板
31~33 貫通孔(一方のボルト孔)
31’~33’ 貫通孔(他方のボルト孔)
X,Y 仮想線
1 Parallel chord truss joists (floor joists)
3 Structural walls (pair of structures)
5 Floor material 9 Bolts and nuts (connecting metal fittings)
10A, 10B Truss unit (parallel string truss unit)
10a, 10a' Joint surfaces 11, 11' Upper chord members 11a, 11a' Through holes 12, 12' Lower chord members 12a, 12a' Through holes 13, 13' Vertical members 14, 14' Diagonal members 20 Upper connecting hardware (connecting hardware)
21-23 Through holes (one bolt hole)
21'~23' Through hole (other bolt hole)
30 Lower connecting hardware (connecting hardware)
30A Bottom plate 30B Front plate 30C Rear plate 31-33 Through hole (one bolt hole)
31'~33' Through hole (other bolt hole)
X, Y virtual line

Claims (3)

複数の平行弦トラスユニットを、該平行弦トラスユニットの接合面下部が当接し、かつ接合面上部が長手方向に離間した状態に連結金物を用いて長手方向に連結して平行弦トラス根太を構成し、
前記平行弦トラス根太を建物において対向する一対の構造体に架設したことを特徴とする2階以上の床における床根太の接合方法。
A parallel chord truss joist is constructed by connecting a plurality of parallel string truss units in the longitudinal direction using connecting hardware, with the lower joint surfaces of the parallel string truss units in contact and the upper joint surfaces separated in the longitudinal direction. death,
1. A method for joining floor joists on floors above the second floor, characterized in that the parallel chord truss joists are installed on a pair of opposing structures in a building.
隣接する前記平行弦トラスユニットの下弦材同士に渡って配設される連結金物として上向きコ字状の下部連結金物が用いられることを特徴とする請求項1に記載の2階以上の床における床根太の接合方法。 The floor of the second floor or higher floor according to claim 1, wherein an upwardly U-shaped lower connecting hardware is used as the connecting hardware disposed across the lower chord members of the adjacent parallel chord truss units. How to join joists. 隣接する前記平行弦トラスユニット同士の上弦材の側面に沿って配設される連結金物としてプレート状の上部連結金物が用いられることを特徴とする請求項1または2に記載の2階以上の床における床根太の接合方法。 3. The floor of the second or higher floor according to claim 1 or 2, wherein a plate-shaped upper connecting hardware is used as the connecting hardware arranged along the side surface of the upper chord between the adjacent parallel chord truss units. How to join floor joists in.
JP2023010872A 2023-01-27 2023-01-27 How to join floor joists on floors above 2nd floor Active JP7420984B1 (en)

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Citations (1)

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Publication number Priority date Publication date Assignee Title
JP2019124097A (en) 2018-01-19 2019-07-25 株式会社竹中工務店 Truss frame

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019124097A (en) 2018-01-19 2019-07-25 株式会社竹中工務店 Truss frame

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