JP2008014017A

JP2008014017A - Stair and stair support body

Info

Publication number: JP2008014017A
Application number: JP2006186178A
Authority: JP
Inventors: Akio Matsunaga; 章生松永
Original assignee: Nippon Light Metal Co Ltd
Current assignee: Nippon Light Metal Co Ltd
Priority date: 2006-07-06
Filing date: 2006-07-06
Publication date: 2008-01-24
Anticipated expiration: 2026-07-06
Also published as: JP4836692B2

Abstract

PROBLEM TO BE SOLVED: To provide a stair with treads are supported by truss structures constructed on a stair fitting part of an upper floor and a stair fitting part of a lower floor, preventing increase in deflection at the central part even if the truss structure is made longer, and also hardly causing long-period swing. SOLUTION: This stair includes: the truss structure 10 including a top chord 11, a bottom chord 12, and a plurality of lattice materials 13; treads 20 supported on the truss structure 10; and a bottom chord support body 30 installed on the stair fitting part F1 of the lower floor, wherein among the connecting points between the lower chord 12 and the lattice materials 13, the connecting point, which is at least the next above the connecting point located at the lower end is taken as a supporting point S, and the supporting point S is supported by the lower chord support body 30. COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、トラス構造体で踏板を支持する形式の階段に関し、さらに、当該階段に好適に用いられる階段支承体に関する。 The present invention relates to a staircase of a type that supports a tread with a truss structure, and further relates to a stair support used suitably for the staircase.

従来、軽快ですっきりとしたデザインを具備する階段として、上階の階段取付部と下階の階段取付部とに架設されたトラス構造体で踏板を支持する形式の階段が本願出願人によって提案されている（例えば、特許文献１および特許文献２参照）。 Conventionally, the applicant of the present invention has proposed a staircase of a type in which a tread structure is supported by a truss structure erected between a staircase mounting portion on an upper floor and a staircase mounting portion on a lower floor as a staircase having a light and neat design. (For example, refer to Patent Document 1 and Patent Document 2).

これら従来の階段に係るトラス構造体の下端部は、図１３に示すように、下弦材１２の下端に配置された下弦支承体３０’および上弦材１１の下端に配置された上弦支承体４０’を介して下階の階段取付部Ｆ１に支持されており、トラス構造体の上端部は、上弦材１１の上端に配置された上弦支承体５０’を介して上階の階段取付部Ｆ２に支持されている。 As shown in FIG. 13, the lower end portions of the truss structures according to these conventional stairs have a lower chord support body 30 ′ arranged at the lower end of the lower chord material 12 and an upper chord support body 40 ′ arranged at the lower end of the upper chord material 11. The upper end of the truss structure is supported by the upper staircase attachment F2 via the upper chord support 50 'disposed at the upper end of the upper chord member 11. Has been.

なお、下弦支承体３０’は、下弦材１２とラチス材１３との接続点のうち、下端に位置する接続点に接続されている。また、下階側の上弦支承体４０’は、上弦材１１とラチス材１３との接続点のうち、下端に位置する接続点に接続されており、上階側の上弦支承体５０’は、上弦材１１の上端に位置する接続点に接続されている。 The lower chord support 30 ′ is connected to a connection point located at the lower end among the connection points of the lower chord member 12 and the lattice member 13. Further, the lower chord support body 40 'is connected to a connection point located at the lower end of the connection points of the upper chord material 11 and the lattice material 13, and the upper chord support body 50' of the upper floor side is It is connected to a connection point located at the upper end of the upper chord material 11.

特開２００４−２３８８６５号公報JP 2004-238865 A 特開２００５−１６０４１号公報JP 2005-16041 A

ところで、前記した階段を階高の大きい建物に設置する場合には、トラス構造体が長尺化することになる。また、階高がさほど大きくない場合であっても、例えば、高齢者対策の一環として階段勾配を緩やかにする場合には、トラス構造体が長尺化することになる。 By the way, when installing the above-mentioned staircase in a building with a large floor height, the truss structure is elongated. Further, even if the floor height is not so large, for example, when the staircase slope is made gentle as part of the measures for elderly people, the truss structure becomes long.

トラス構造体が長尺化すると、その中央部での撓みが大きくなる虞があり、また、長周期の揺れも発生し易くなることから、十分な強度を備えていても、昇降者に不安を抱かせる虞がある。なお、上弦材や下弦材を重厚にすれば、撓みや長周期の揺れを抑えることはできるが、軽快な印象が損なわれてしまうので、推奨することはできない。 If the truss structure is lengthened, there is a risk that bending at the center will increase, and long-period vibrations are likely to occur. There is a risk of holding them. In addition, if the upper chord material and the lower chord material are made heavy, it is possible to suppress bending and long-period shaking, but this is not recommended because it reduces the light impression.

このような観点から、本発明は、トラス構造体で踏板を支持する形式の階段であって、トラス構造体が長尺化しても、その中央部での撓みが大きくならず、かつ、長周期の揺れが発生し難くなる階段を提供することを課題とし、さらには、このような階段に好適に用いられる階段支承体を提供することを課題とする。 From this point of view, the present invention is a staircase of the type in which the tread is supported by the truss structure, and even when the truss structure is lengthened, the deflection at the center portion does not increase, and the long period It is an object of the present invention to provide a staircase that is less likely to sway, and to provide a stair support that is suitably used for such a staircase.

このような課題を解決するために創案された本発明に係る階段は、上弦材と下弦材とこれらを連結する複数のラチス材とを含んで構成されるトラス構造体と、前記トラス構造体に支持される踏板と、下階の階段取付部に設置される下弦支承体と、を備える階段であって、前記下弦材と前記ラチス材との接続点のうち、下端に位置する前記接続点よりも少なくとも一つ上に位置する前記接続点を支持点とし、当該支持点を前記下弦支承体で支持したことを特徴とする。 A staircase according to the present invention created to solve such a problem includes a truss structure including an upper chord material, a lower chord material, and a plurality of lattice materials connecting them, and the truss structure A stair including a tread that is supported and a lower chord support installed in a staircase mounting portion on a lower floor, from among the connection points of the lower chord material and the lattice material, from the connection point located at the lower end The at least one connection point located above is a support point, and the support point is supported by the lower chord support.

本発明に係る階段によれば、下弦材の下端に位置する接続点を支持する場合に比べて、トラス構造体の支点間距離を短くすることが可能となるので、トラス構造体が長尺化しても、その中央部での撓みが大きくならず、かつ、長周期の揺れが発生し難くなる。加えて、本発明に係る階段によれば、上弦材や下弦材を重厚にする必要がないので、軽快な印象を維持しつつ、撓みや長周期の揺れを抑えることが可能となる。 According to the staircase according to the present invention, the distance between the fulcrums of the truss structure can be shortened compared to the case where the connection point located at the lower end of the lower chord material is supported. However, the deflection at the center portion does not increase, and long-period shaking hardly occurs. In addition, according to the stairs according to the present invention, since it is not necessary to make the upper chord material and the lower chord material heavy, it is possible to suppress bending and long-period shaking while maintaining a light impression.

また、前記した課題を解決するために創案された本発明に係る階段支承体は、踏板を支持する構造体の下端部に設けられた支持点と下階の階段取付部との間に介設される階段支承体であって、前記階段取付部に固定されるベース部材と、前記ベース部材に立設される束部材と、前記束部材と前記支持点との間に介設される連結部材とを備えて構成されていることを特徴とする。なお、踏板を支持する構造体には、トラス構造体のほか、側桁やささら桁などが含まれる。 In addition, the stair support according to the present invention, which was created to solve the above-described problems, is provided between a support point provided at the lower end of the structure that supports the step board and the stair attachment portion on the lower floor. And a base member fixed to the staircase mounting portion, a bundle member standing on the base member, and a connecting member interposed between the bundle member and the support point It is characterized by comprising. Note that the structure that supports the tread includes not only the truss structure but also side girders and sacks.

前記した本発明に係る階段においては、前記下弦材と前記ラチス材との接続点のうち、下端に位置する接続点よりも少なくとも一つ上に位置する接続点を支持点としているので、下端に位置する接続点を支持点とした場合に比べて、支持点と下階の階段取付部との離間距離が大きくなる傾向にあるが、本発明に係る階段支承体によれば、ベース部材と連結部材との間に束部材を具備しているので、支持点と下階の階段取付部との離間距離が大きい場合であっても容易に対応することができる。なお、本発明に係る階段支承体は、本発明に係る階段以外にも使用することができる。 In the above-described staircase according to the present invention, among the connection points between the lower chord material and the lattice material, the connection point located at least one higher than the connection point located at the lower end is used as the support point, so Compared with the case where the connection point located as a support point is used, the separation distance between the support point and the lower floor stair mounting portion tends to be larger, but the stair support according to the present invention is connected to the base member. Since the bundle member is provided between the members, even if the separation distance between the support point and the staircase mounting portion on the lower floor is large, it can be easily handled. In addition, the stair support body which concerns on this invention can be used besides the staircase which concerns on this invention.

また、構造体の支持点と下階の階段取付部との間の離間距離は、階段の設置状況によって変化することになるが、この階段支承体によれば、束部材を長さの異なる他の束部材に取り替えるだけで、高さ寸法を変更することができるので、建物ごとに異なる階段の設置状況に容易に対応することが可能となる。 In addition, the separation distance between the support point of the structure and the staircase mounting portion on the lower floor varies depending on the installation status of the staircase, but according to this staircase support body, the bundle members have different lengths. Since the height dimension can be changed simply by replacing it with a bundle member, it becomes possible to easily cope with different staircase installation conditions for each building.

また、前記束部材の下端部をピン支持状態で前記ベース部材に接続し、前記束部材の上端部をピン支持状態で前記連結部材に接続すると、束部材を傾倒させることが可能となるので、束部材の傾斜角度を変更することが可能となる。束部材の傾斜角度が変更できれば、高さ寸法の微調整を行うことが可能となるので、建物ごとに異なる階段の設置状況に容易に対応することが可能となり、さらには、設置誤差が発生した場合であっても、容易に対応することが可能となる。 Further, when the lower end portion of the bundle member is connected to the base member in a pin-supported state and the upper end portion of the bundle member is connected to the connecting member in a pin-supported state, the bundle member can be tilted. It becomes possible to change the inclination angle of the bundle member. If the inclination angle of the bundle member can be changed, it is possible to finely adjust the height dimension, so that it is possible to easily cope with the installation situation of different stairs for each building, and further installation errors have occurred. Even if it is a case, it becomes possible to cope easily.

本発明に係る階段によると、踏板を支持するトラス構造体が長尺化しても、その中央部での撓みが大きくならず、かつ、長周期の揺れが発生し難くなる。 According to the staircase according to the present invention, even if the truss structure supporting the tread is elongated, the bending at the center portion does not increase and long-period shaking hardly occurs.

また、本発明に係る階段支承体によれば、束部材を長さの異なる他の束部材に取り替えるだけで、高さ寸法を変更することができるので、建物ごとに異なる階段の設置状況に容易に対応することが可能となる。 In addition, according to the stair support according to the present invention, the height dimension can be changed simply by replacing the bundle member with another bundle member having a different length. It becomes possible to cope with.

以下、本発明に係る階段および本発明に係る階段支承体を実施するための最良の形態を、添付した図面を参照しつつ詳細に説明する。 Hereinafter, the best mode for carrying out the staircase according to the present invention and the stair support according to the present invention will be described in detail with reference to the accompanying drawings.

本発明の実施形態に係る階段は、図１に示すように、トラス構造体１０と、踏板２０と、下弦支承体３０と、下階側の上弦支承体４０と、上階側の上弦支承体５０と、手摺６０と、を備えて構成されている。なお、下弦支承体３０が、本発明に係る階段支承体の実施形態に相当する。 As shown in FIG. 1, the staircase according to the embodiment of the present invention includes a truss structure body 10, a tread plate 20, a lower string support body 30, an upper string support body 40 on the lower floor side, and an upper string support body on the upper floor side. 50 and a handrail 60. The lower string support 30 corresponds to an embodiment of the stair support according to the present invention.

トラス構造体１０は、踏板２０を支持するものであって、上弦材１１と下弦材１２とこれらを連結する複数のラチス材１３，１３，…とを含んで構成される構面（トラス面）を備えている。図２に示すように、本実施形態に係るトラス構造体１０は、逆ハ字状に対向する左右一対のトラス面を具備する立体的な骨組構造体であって、階段勾配で傾斜する左右一対の上弦材１１，１１と、この上弦材１１，１１の下方に配置された左右一対の下弦材１２，１２と、上弦材１１と下弦材１２とを連結する複数のラチス材１３，１３，…と、左右の上弦材１１，１１を連結する複数の上弦連結材１４，１４，…と、左右の下弦材１２，１２を連結する複数の下弦連結材１５，１５，…と、上弦材１１に沿って配置された補強材１６とを備えて構成されている。 The truss structure 10 supports the tread 20 and includes a top chord member 11, a lower chord member 12, and a plurality of lattice members 13, 13,... It has. As shown in FIG. 2, the truss structure body 10 according to the present embodiment is a three-dimensional frame structure including a pair of left and right truss surfaces opposed in an inverted C shape, and is a pair of left and right frames inclined with a staircase gradient. Upper chord members 11, 11, a pair of left and right lower chord members 12, 12 disposed below the upper chord members 11, 11, and a plurality of lattice members 13, 13,... Connecting the upper chord member 11 and the lower chord member 12. , A plurality of upper chord connecting members 14, 14,... That connect the left and right upper chord members 11, 11, a plurality of lower chord connecting members 15, 15,. And a reinforcing member 16 arranged along the line.

上弦材１１および下弦材１２は、それぞれ、長手方向に連設された複数の棒状要素１と、長手方向に隣り合う棒状要素１，１を連結する節点要素２（以下、「ハブ２」という。）とを備えて構成されている。 Each of the upper chord member 11 and the lower chord member 12 is a nodal element 2 (hereinafter referred to as “hub 2”) that connects a plurality of rod-like elements 1 connected in the longitudinal direction and the rod-like elements 1 and 1 adjacent in the longitudinal direction. ).

棒状要素１は、断面円形のアルミニウム合金製の中空押出形材を加工したものであり、図３の（ａ）に示すように、その両端に偏平状の接続端部１ａ，１ａを有している。接続端部１ａは、図３の（ｂ）に示すように、後記するハブ２の連結溝２ａに嵌合される部位であり、図３の（ｃ）に示すように、本実施形態では、棒状要素１の中心軸線に直交する方向に延びる凹凸を具備している。なお、接続端部１ａは、中空押出形材の両端をプレス加工などにより押し潰すことにより形成することができる。 The rod-shaped element 1 is obtained by processing a hollow extruded section made of an aluminum alloy having a circular cross section, and has flat connection end portions 1a and 1a at both ends thereof as shown in FIG. Yes. As shown in FIG. 3B, the connecting end portion 1a is a portion that is fitted into a connecting groove 2a of the hub 2 described later. In the present embodiment, as shown in FIG. Concavities and convexities extending in a direction perpendicular to the central axis of the rod-shaped element 1 are provided. The connecting end 1a can be formed by crushing both ends of the hollow extruded shape member by pressing or the like.

ハブ２は、図４に示すように、本実施形態では円柱形状を呈している。ハブ２の外周面には、複数の連結溝２ａ，２ａ，…が形成されている。連結溝２ａは、棒状要素１の接続端部１ａや後記するラチス材１３の接続端部１３ａと同一の断面形状に成形されており、その内壁面には、接続端部１ａ，１３ａの凹凸と係合する凹凸が形成されている。また、ハブ２の中心には、ボルト挿通孔２ｂが形成されている。ボルト挿通孔２ｂには、ねじ棒Ｂ１が挿通される。ネジ棒Ｂ１は、ハブ２の端面に配置される抜け止用のワッシャ２ｃを固定するためのものであり、その両端にはナットＮ１が螺合される。ハブ２は、アルミニウム合金製の押出形材からなり、連結溝２ａおよびボルト挿通孔２ｂは、アルミニウム合金を押出成形する際に形成される。なお、ハブ２は、鋳造により製作してもよい。また、ハブ２の形状も図示のものに限定されることはなく、角柱形状その他の形状にしても差し支えない。 As shown in FIG. 4, the hub 2 has a cylindrical shape in the present embodiment. A plurality of connecting grooves 2 a, 2 a,... Are formed on the outer peripheral surface of the hub 2. The connecting groove 2a is formed in the same cross-sectional shape as the connecting end 1a of the rod-like element 1 and the connecting end 13a of the lattice material 13 to be described later, and on the inner wall surface, the concavity and convexity of the connecting ends 1a and 13a are formed. Engaging irregularities are formed. A bolt insertion hole 2 b is formed at the center of the hub 2. The screw rod B1 is inserted through the bolt insertion hole 2b. The screw rod B1 is for fixing a retaining washer 2c arranged on the end face of the hub 2, and nuts N1 are screwed to both ends thereof. The hub 2 is made of an extruded shape made of an aluminum alloy, and the connecting groove 2a and the bolt insertion hole 2b are formed when the aluminum alloy is extruded. The hub 2 may be manufactured by casting. Further, the shape of the hub 2 is not limited to that shown in the figure, and may be a prismatic shape or other shapes.

図２に示すように、ラチス材１３は、本実施形態では、上弦材１１および下弦材１２に斜交するように配置された一本の棒状要素によって構成されていて、その一端が上弦材１１を構成するハブ２に接続され、他端が下弦材１２を構成するハブ２に接続されている。より詳細には、図５の（ｃ）に示すように、ラチス材１３は、ハブ２の中心軸線に対して角度αだけ傾斜した状態で後記するハブ２に接続される。ラチス材１３は、アルミニウム合金製の中空押出形材を加工したものであり、図５の（ａ）に示すように、その両端に偏平状の接続端部１３ａを有している。接続端部１３ａは、図５の（ｂ）に示すように、ハブ２の連結溝２ａに嵌合される部位であり、本実施形態では、図５の（ｃ）に示すように、ラチス材１３の中心軸線に対して角度αで傾斜する方向に延びる凹凸を具備している。接続端部１３ａの凹凸は、ハブ２の連結溝２ａの凹凸に係合する。なお、接続端部１３ａは、前記した棒状要素１の場合と同様に、中空押出形材の両端をプレス加工などにより押し潰すことにより形成することができる。 As shown in FIG. 2, in this embodiment, the lattice material 13 is constituted by a single bar-shaped element disposed so as to cross the upper chord material 11 and the lower chord material 12, and one end thereof is the upper chord material 11. The other end is connected to the hub 2 constituting the lower chord material 12. More specifically, as shown in FIG. 5C, the lattice material 13 is connected to the hub 2 described later in a state inclined by an angle α with respect to the central axis of the hub 2. The lattice material 13 is obtained by processing a hollow extruded shape made of an aluminum alloy, and has flat connection end portions 13a at both ends thereof as shown in FIG. As shown in FIG. 5B, the connecting end portion 13a is a portion that is fitted into the connecting groove 2a of the hub 2. In this embodiment, as shown in FIG. 5C, the lattice material is used. It has unevenness extending in a direction inclined at an angle α with respect to 13 central axes. The unevenness of the connection end 13a engages with the unevenness of the connecting groove 2a of the hub 2. In addition, the connection edge part 13a can be formed by crushing the both ends of a hollow extrusion shape material by press work etc. similarly to the case of the above-mentioned rod-shaped element 1. FIG.

図２に示す上弦連結材１４および下弦連結材１５は、それぞれ、一本の棒状要素によって構成されている。上弦連結材１４および下弦連結材１５の構成は、前記した棒状要素１と同様であるので、その詳細な説明を省略するが、上弦連結材１４は、上弦材１１を構成するハブ２に接続され、下弦連結材１５は、下弦材１２を構成するハブ２に接続される。 Each of the upper chord connecting member 14 and the lower chord connecting member 15 shown in FIG. 2 is composed of one bar-like element. Since the configurations of the upper chord connecting member 14 and the lower chord connecting member 15 are the same as those of the rod-like element 1 described above, the detailed description thereof is omitted, but the upper chord connecting member 14 is connected to the hub 2 constituting the upper chord member 11. The lower chord connecting member 15 is connected to the hub 2 constituting the lower chord member 12.

補強材１６は、棒状要素１とハブ２との接合部の弱軸方向（左右方向）の強度を補強するものであり、上弦材１１の全長と同じ長さを有するアルミニウム合金製の押出形材からなり、本実施形態では、上弦材１１を構成している総てのハブ２に対して固定されている。 The reinforcing member 16 reinforces the strength in the weak axis direction (left-right direction) of the joint portion between the rod-shaped element 1 and the hub 2, and is an extruded shape member made of aluminum alloy having the same length as the entire length of the upper chord member 11. In this embodiment, it is fixed to all the hubs 2 constituting the upper chord material 11.

図１に示す踏板２０は、木製や金属製などの板材からなり、本実施形態では、受け材２１を介してトラス構造体１０に支持・固定されている。受け材２１は、図６に示すように、階段勾配で傾斜して補強材１６の上面に当接する取付面２１ａと、踏板２０が載置・固定される踏板支持面２１ｂとを備えて構成されていて、補強材１６の上面に固定されている。受け材２１は、アルミニウム合金製の中空押出形材からなり、図示は省略するが、隣り合う上弦材１１，１１間に架設されている。なお、図示は省略するが、同じ高さに配置した左右一対の受け材で踏板２０を支持してもよい。 A tread board 20 shown in FIG. 1 is made of a plate material made of wood or metal, and is supported and fixed to the truss structure body 10 via a receiving member 21 in this embodiment. As shown in FIG. 6, the receiving member 21 is configured to include a mounting surface 21 a that is inclined in a staircase gradient and comes into contact with the upper surface of the reinforcing member 16, and a tread plate support surface 21 b on which the tread plate 20 is placed and fixed. It is fixed to the upper surface of the reinforcing material 16. The receiving member 21 is made of a hollow extruded shape member made of an aluminum alloy, and is not shown in the figure, but is spanned between adjacent upper chord members 11 and 11. In addition, although illustration is abbreviate | omitted, you may support the tread board 20 with a pair of left-right receiving material arrange | positioned at the same height.

図１に示す下弦支承体３０は、下弦材１２とラチス材１３との接続点のうち、下端に位置する接続点よりも少なくとも一つ上に位置する接続点（以下、「支持点Ｓ」という。）を支持するものである。なお、本実施形態では、ハブ２が下弦材１２とラチス材１３との接続点に相当する。 The lower chord support 30 shown in FIG. 1 is a connection point (hereinafter referred to as “support point S”) located at least one point higher than the connection point located at the lower end among the connection points between the lower chord member 12 and the lattice member 13. )). In the present embodiment, the hub 2 corresponds to a connection point between the lower chord member 12 and the lattice member 13.

下弦支承体３０は、図７に示すように、下階の階段取付部Ｆ１に固定されるベース部材３Ａと、支持点Ｓとなるハブ２に固定される連結部材３Ｂと、ベース部材３Ａと連結部材３Ｂとの間に介設される束部材３Ｃとを備えて構成されている。 As shown in FIG. 7, the lower chord support 30 is connected to the base member 3A fixed to the lower-stage staircase mounting portion F1, the connecting member 3B fixed to the hub 2 serving as the support point S, and the base member 3A. A bundle member 3C interposed between the members 3B is provided.

ベース部材３Ａは、図８の（ａ）に示すように、階段取付部Ｆ１に載置される基部３１と、この基部３１の中央部に対向して立設された左右一対の下支持部３２とを備えて構成されている。基部３１は、板状を呈しており、その適所に取付孔３１ａ，３１ａが形成されている。取付孔３１ａには、ベース部材３Ａを階段取付部Ｆ１に固定するためのボルトＢ３が挿通される。下支持部３２は、板状を呈しており、その略中央部に下支持孔３２ａが形成されている。下支持孔３２ａには、束部材３Ｃの下端部を支持するための下支持軸３３が挿通される。なお、本実施形態では、ボルトの軸部を下支持軸３３としている。 As shown in FIG. 8A, the base member 3 A includes a base portion 31 that is placed on the staircase mounting portion F 1 and a pair of left and right lower support portions 32 that are erected facing the center portion of the base portion 31. And is configured. The base 31 has a plate shape, and mounting holes 31a and 31a are formed at appropriate positions. A bolt B3 for fixing the base member 3A to the staircase attachment portion F1 is inserted through the attachment hole 31a. The lower support portion 32 has a plate shape, and a lower support hole 32a is formed at a substantially central portion thereof. A lower support shaft 33 for supporting the lower end portion of the bundle member 3C is inserted into the lower support hole 32a. In this embodiment, the shaft portion of the bolt is the lower support shaft 33.

ベース部材３Ａは、図８の（ｂ）に示すように、板部３０１と一対の立上部３０２，３０２とを備えるアルミニウム合金製の押出形材３００を適宜な寸法で切断するとともに、切り出した押出形材３００において立上部３０２の前後を切除することで製作される。なお、ベース部材３Ａは、鋳造により製作してもよいし、板材を溶接により接合して製作してもよい。 As shown in FIG. 8B, the base member 3A cuts an extruded shape member 300 made of an aluminum alloy including a plate portion 301 and a pair of upright portions 302, 302 with appropriate dimensions and cut out the extruded member. It is manufactured by cutting the front and back of the upright portion 302 in the shape member 300. The base member 3A may be manufactured by casting, or may be manufactured by joining plate members by welding.

連結部材３Ｂは、図８の（ａ）に示すように、束部材３Ｃと支持点Ｓであるハブ２との間に介設されるものであり、本実施形態では、ハブ２の下面に固定される固定部３４と、この固定部３４に対向して垂設された一対の上支持部３５，３５とを備えて構成されている。固定部３４は、板状を呈しており、その中央部に取付孔３４ａが形成されている。取付孔３４ａには、連結部材３Ｂを支持点Ｓであるハブ２に固定するためのボルトＢ１（図４参照）が挿通される。上支持部３５，３５の対向面（内面）間の距離は、ベース部材３Ａの下支持部３２，３２の外面間の距離と略等しくなっている。上支持部３５は、板状を呈しており、その下端部に上支持孔３５ａが形成されている。上支持孔３５ａには、束部材３Ｃの上端部を支持するための上支持軸３６が挿通される。なお、本実施形態では、ボルトの軸部を上支持軸３６としている。 As shown in FIG. 8A, the connecting member 3 B is interposed between the bundle member 3 C and the hub 2 that is the support point S, and is fixed to the lower surface of the hub 2 in this embodiment. And a pair of upper support portions 35, 35 suspended from the fixed portion 34. The fixing portion 34 has a plate shape, and an attachment hole 34a is formed at the center thereof. A bolt B1 (see FIG. 4) for fixing the connecting member 3B to the hub 2 as the support point S is inserted into the mounting hole 34a. The distance between the opposing surfaces (inner surfaces) of the upper support portions 35, 35 is substantially equal to the distance between the outer surfaces of the lower support portions 32, 32 of the base member 3A. The upper support portion 35 has a plate shape, and an upper support hole 35a is formed at the lower end thereof. An upper support shaft 36 for supporting the upper end portion of the bundle member 3C is inserted into the upper support hole 35a. In the present embodiment, the shaft portion of the bolt is the upper support shaft 36.

連結部材３Ｂは、図示は省略するが、アルミニウム合金製の押出形材を適宜な寸法で切断・切除することで製作される。なお、連結部材３Ｂは、鋳造により製作してもよいし、板材を溶接により接合して製作してもよい。 Although not shown in the drawing, the connecting member 3B is manufactured by cutting and cutting an extruded shape made of an aluminum alloy with an appropriate dimension. The connecting member 3B may be manufactured by casting, or may be manufactured by joining plate members by welding.

図７に示すように、束部材３Ｃは、ベース部材３Ａに立設されており、かつ、その上端部が連結部材３Ｂに接続されている。すなわち、束部材３Ｃは、その下端部がベース３Ａに接続され、上端部が連結部材３Ｂに接続されている。図８の（ａ）に示すように、束部材３Ｃは、帯板状を呈していて、その左右の側面が互いに平行に成形されている。なお、束部材３Ｃの上端面および下端面は、それぞれ、半円筒面状に成形されている。 As shown in FIG. 7, the bundle member 3C is erected on the base member 3A, and the upper end portion thereof is connected to the connecting member 3B. That is, the lower end portion of the bundle member 3C is connected to the base 3A, and the upper end portion is connected to the connecting member 3B. As shown to (a) of FIG. 8, 3 C of bundle members are exhibiting strip | belt plate shape, and the left and right side surfaces are shape | molded in parallel mutually. The upper end surface and the lower end surface of the bundle member 3C are each formed into a semicylindrical surface shape.

束部材３Ｃの下端部は、下支持軸３３を介してベース部材３Ａの下支持部３２に接続され、下支持軸３３の軸回りに回動可能である。すなわち、束部材３Ｃの下端部は、ピン支持状態でベース部材３Ａに接続される。なお、束部材３Ｃの下端部は、ベース部材３Ａの下支持部３２，３２の対向面（内面）間の距離と略等しい厚さ寸法に設定されていて、下支持部３２，３２の対向面間に挿入される。束部材３Ｃの下端部には、下支持軸３３が挿通される下挿通孔３７ａが形成されている。下挿通孔３７ａは、束部材３Ｃの下端部を左右方向に貫通している。 The lower end portion of the bundle member 3 C is connected to the lower support portion 32 of the base member 3 A via the lower support shaft 33, and can be rotated around the lower support shaft 33. That is, the lower end portion of the bundle member 3C is connected to the base member 3A in a pin supported state. The lower end portion of the bundle member 3C is set to have a thickness dimension substantially equal to the distance between the opposing surfaces (inner surfaces) of the lower support portions 32, 32 of the base member 3A, and the opposing surfaces of the lower support portions 32, 32 Inserted between. A lower insertion hole 37a through which the lower support shaft 33 is inserted is formed at the lower end of the bundle member 3C. The lower insertion hole 37a penetrates the lower end portion of the bundle member 3C in the left-right direction.

一方、束部材３Ｃの上端部は、上支持軸３６を介して連結部材３Ｂの上支持部３５に接続され、上支持軸３６の軸回りに回動可能である。すなわち、束部材３Ｃの上端部は、ピン支持状態で連結部材３Ｂに接続される。なお、束部材３Ｃの上端部は、上支持部３５，３５の対向面（内面）間に挿入される。束部材３Ｃの上端部には、上支持軸３６が挿通される上挿通孔３７ｂが形成されている。上挿通孔３７ｂは、束部材３Ｃの上端部を左右方向に貫通している。なお、束部材３Ｃの上端部の側面と連結部材３Ｂの上支持部３５の内面との間には、透孔３８ａを有するスペーサ３８が介設される。 On the other hand, the upper end portion of the bundle member 3 C is connected to the upper support portion 35 of the connecting member 3 B via the upper support shaft 36, and can rotate about the upper support shaft 36. That is, the upper end portion of the bundle member 3C is connected to the connecting member 3B in a pin supported state. Note that the upper end portion of the bundle member 3C is inserted between the opposing surfaces (inner surfaces) of the upper support portions 35 and 35. An upper insertion hole 37b through which the upper support shaft 36 is inserted is formed at the upper end of the bundle member 3C. The upper insertion hole 37b penetrates the upper end portion of the bundle member 3C in the left-right direction. A spacer 38 having a through hole 38a is interposed between the side surface of the upper end portion of the bundle member 3C and the inner surface of the upper support portion 35 of the connecting member 3B.

ベース部材３Ａと束部材３Ｃとを連結するには、ベース部材３Ａの下支持部３２，３２の対向面間に束部材３Ｃの下端部を挿入し、下支持部３２の下支持孔３２ａと束部材３Ｃの下挿通孔３７ａの位置を合わせたうえで、一方の下支持部３２側から下支持孔３２ａと下挿通孔３７ａとに下支持軸３３を挿入し、他方の下支持部３２の下支持孔３２ａから突出した下支持軸３３の先端部にナット３３ａを螺合すればよい。 To connect the base member 3A and the bundle member 3C, the lower end portion of the bundle member 3C is inserted between the opposing surfaces of the lower support portions 32, 32 of the base member 3A, and the lower support hole 32a and the bundle of the lower support portion 32 are bundled. After aligning the position of the lower insertion hole 37a of the member 3C, the lower support shaft 33 is inserted into the lower support hole 32a and the lower insertion hole 37a from the one lower support part 32 side, What is necessary is just to screw the nut 33a in the front-end | tip part of the lower support shaft 33 protruded from the support hole 32a.

また、連結部材３Ｂと束部材３Ｃとを連結するには、連結部材３Ｂの上支持部３５，３５の対向面間に束部材３Ｃの上端部を挿入するとともに、その側面と上支持部３５の内面との間にスペーサ３８，３８を挿入し、上支持部３５の上支持孔３５ａと束部材３Ｃの上挿通孔３７ｂとスペーサ３８の透孔３８ａとの位置を合わせたうえで、一方の上支持部３５側から上支持孔３５ａと上挿通孔３７ｂと透孔３８ａとに上支持軸３６を挿入し、他方の上支持部３５の上支持孔３５ａから突出した上支持軸３６の先端部にナット３６ａを螺合すればよい。 Further, in order to connect the connecting member 3B and the bundle member 3C, the upper end portion of the bundle member 3C is inserted between the opposing surfaces of the upper support portions 35, 35 of the connection member 3B, and the side surface and the upper support portion 35 are connected. Spacers 38 are inserted between the inner surface and the positions of the upper support hole 35a of the upper support portion 35, the upper insertion hole 37b of the bundle member 3C, and the through hole 38a of the spacer 38, and then The upper support shaft 36 is inserted into the upper support hole 35a, the upper insertion hole 37b, and the through-hole 38a from the support portion 35 side, and the tip of the upper support shaft 36 protruding from the upper support hole 35a of the other upper support portion 35 is inserted. What is necessary is just to screw the nut 36a.

図７に示す下階側の上弦支承体４０は、上弦材１１とラチス材１３との接続点のうち、下端に位置する接続点（ハブ２）を支持するものであって、下階の階段取付部Ｆ１に固定されるベース部材４Ａと、上弦材１１の下端に位置するハブ２に固定される連結部材４Ｂとを備えて構成されている。 7 supports the connection point (hub 2) located at the lower end among the connection points between the upper chord material 11 and the lattice material 13, and is provided on the lower floor staircase. The base member 4 A is fixed to the mounting portion F 1, and the connecting member 4 B is fixed to the hub 2 positioned at the lower end of the upper chord material 11.

ベース部材４Ａおよび連結部材４Ｂは、下弦支承体３０のベース部材３Ａおよび連結部材３Ｂと同一の構成を備えている。本実施形態では、寸法や材質も同一になっている。 The base member 4A and the connecting member 4B have the same configuration as the base member 3A and the connecting member 3B of the lower chord support 30. In this embodiment, dimensions and materials are also the same.

ベース部材４Ａと連結部材４Ｂとを連結するには、図９に示すように、ベース部材４Ａの下支持部４２，４２の対向面間に透孔４７ａを有するスペーサ４７を挿入したうえで、連結部材４Ｂの上支持部４５，４５の対向面間にベース部材４Ａの下支持部４２，４２を挿入し、下支持部４２の下支持孔４２ａと上支持部４５の上支持孔４５ａとスペーサ４７の透孔４７ａの位置を合わせたうえで、一方の上支持部４５側から下支持孔４２ａと上支持孔４５ａと透孔４７ａとに支持軸４３を挿入し、他方の上支持部４５の上支持孔４５ａから突出した支持軸４３の先端部にナット４３ａを螺合すればよい。 In order to connect the base member 4A and the connecting member 4B, as shown in FIG. 9, a spacer 47 having a through hole 47a is inserted between the opposing surfaces of the lower support portions 42, 42 of the base member 4A, and then connected. The lower support portions 42, 42 of the base member 4A are inserted between the opposing surfaces of the upper support portions 45, 45 of the member 4B, and the lower support hole 42a of the lower support portion 42, the upper support hole 45a of the upper support portion 45, and the spacer 47. After the positions of the through holes 47a are aligned, the support shaft 43 is inserted into the lower support hole 42a, the upper support hole 45a, and the through hole 47a from the one upper support part 45 side, What is necessary is just to screw the nut 43a in the front-end | tip part of the support shaft 43 which protruded from the support hole 45a.

図１０の（ａ）に示す上階側の上弦支承体５０は、上弦材１１とラチス材１３との接続点のうち、上端に位置する接続点（ハブ２）を支持するものであって、上階の階段取付部Ｆ２に固定されるベース部材５Ａと、ハブ２に固定される連結部材５Ｂとを備えて構成されている。 An upper chord support 50 on the upper floor side shown in FIG. 10A supports a connection point (hub 2) located at the upper end among the connection points of the upper chord material 11 and the lattice material 13, The base member 5 A is fixed to the upper staircase mounting portion F 2 and the connecting member 5 B is fixed to the hub 2.

ベース部材５Ａは、図１０の（ｂ）に示すように、階段取付部Ｆ２に固定される基部５１と、この基部５１の中央部に対向して立設された左右一対の支持部５２とを備えて構成されている。基部５１は、板状を呈しており、その適所に取付孔５１ａ，５１ａ，…が形成されている。取付孔５１ａには、ベース部材５Ａを階段取付部Ｆ２に固定するためのボルトＢ５が挿通される。支持部５２は、板状を呈しており、その略中央部に支持孔５２ａが形成されている。支持孔５２ａには、連結部材３Ｂを支持するための支持軸５３が挿通される。なお、本実施形態では、ボルトの軸部を支持軸５３としている。 As shown in FIG. 10B, the base member 5 A includes a base 51 fixed to the staircase mounting portion F 2 and a pair of left and right support portions 52 that are erected facing the center of the base 51. It is prepared for. The base 51 has a plate shape, and attachment holes 51a, 51a,... Are formed at appropriate positions. A bolt B5 for fixing the base member 5A to the staircase attachment portion F2 is inserted through the attachment hole 51a. The support portion 52 has a plate shape, and a support hole 52a is formed at a substantially central portion thereof. A support shaft 53 for supporting the connecting member 3B is inserted through the support hole 52a. In the present embodiment, the shaft portion of the bolt is the support shaft 53.

ベース部材５Ａは、図示は省略するが、アルミニウム合金製の押出形材を適宜な寸法で切断・切除することで製作される。なお、ベース部材５Ａは、鋳造により製作してもよいし、板材を溶接により接合して製作してもよい。 Although not shown, the base member 5A is manufactured by cutting and cutting an extruded shape made of an aluminum alloy with an appropriate size. The base member 5A may be manufactured by casting, or may be manufactured by joining plate members by welding.

連結部材５Ｂは、ベース部材５Ａに接続される本体部５４と、ハブ２に接続される接続端部５５とを備えて構成されている。本体部５４は、支持軸５３を介してベース部材５Ａの支持部５２に接続され、支持軸５３の軸回りに回動可能である。すなわち、本体部５４は、ピン支持状態でベース部材５Ａに接続される。なお、本体部５４は、ベース部材５Ａの支持部５２，５２の対向面（内面）間の距離と略等しい厚さ寸法に設定されていて、支持部５２，５２の対向面間に挿入される。本体部５４には、支持軸５３が挿通される挿通孔５４ａが形成されている。挿通孔５４ａは、本体部５４を左右方向に貫通している。接続端部５５は、ハブ２の連結溝２ａに嵌合される部位であり、本体部５４の端縁に沿って形成されている。 The connecting member 5B includes a main body portion 54 connected to the base member 5A and a connection end portion 55 connected to the hub 2. The main body portion 54 is connected to the support portion 52 of the base member 5 A via the support shaft 53, and can rotate around the support shaft 53. That is, the main body 54 is connected to the base member 5A in a pin supported state. The main body 54 is set to have a thickness dimension substantially equal to the distance between the opposing surfaces (inner surfaces) of the support portions 52, 52 of the base member 5A, and is inserted between the opposing surfaces of the support portions 52, 52. . The main body portion 54 is formed with an insertion hole 54a through which the support shaft 53 is inserted. The insertion hole 54a penetrates the main body portion 54 in the left-right direction. The connection end portion 55 is a portion that is fitted into the connection groove 2 a of the hub 2, and is formed along the end edge of the main body portion 54.

ベース部材５Ａと連結部材５Ｂとを連結するには、ベース部材５Ａの支持部５２，５２の対向面間に連結部材５Ｂの本体部５４を挿入し、支持部５２の支持孔５２ａと本体部５４の挿通孔５４ａの位置を合わせたうえで、一方の支持部５２側から支持孔５２ａと挿通孔５４ａとに支持軸５３を挿入し、他方の支持部５２の支持孔５２ａから突出した支持軸５３の先端部にナット５３ａを螺合すればよい。 In order to connect the base member 5A and the connecting member 5B, the main body portion 54 of the connecting member 5B is inserted between the opposing surfaces of the support portions 52, 52 of the base member 5A, and the support hole 52a of the support portion 52 and the main body portion 54 are inserted. The support shaft 53 is inserted into the support hole 52a and the insertion hole 54a from the one support portion 52 side, and the support shaft 53 protrudes from the support hole 52a of the other support portion 52. What is necessary is just to screw the nut 53a in the front-end | tip part.

手摺６０は、図１に示すように、踏板２０，２０，…に立設された支柱６１，６１，…と、この支柱６１，６１，…に支持された笠木６２と、隣り合う支柱６１，６１間に配置された透明パネル６３とを備えて構成されている。なお、手摺６０の形態や材質に特に制限はなく、居室の雰囲気や居住者の好みに応じて変更してもよい。 As shown in FIG. 1, the handrail 60 includes struts 61, 61,... Standing on the treads 20, 20,..., A headboard 62 supported by the struts 61, 61,. 61 and a transparent panel 63 disposed between the two. In addition, there is no restriction | limiting in particular in the form and material of the handrail 60, You may change according to the atmosphere of a living room, or a resident's liking.

次に、階段の構築手順の一例を説明する。
まず、図２に示すように、棒状要素１、ラチス材１３、上弦連結材１４、下弦連結材１５をハブ２で連結してトラス構造体１０を形成する。棒状要素１をハブ２に接続するには、図４に示すように、棒状要素１の接続端部１ａをハブ２の端面側から連結溝２ａに嵌合し、各々に形成した凹凸を係合させればよい。ラチス材１３、上弦連結材１４、下弦連結材１５についても同様である。なお、図１０の（ｂ）に示すように、上弦材１１の上端に位置するハブ２の連結溝２ａには、上階側の上弦支承体５０となる連結部材５Ｂの接続端部５５を嵌合させておく。 Next, an example of the construction procedure of stairs will be described.
First, as shown in FIG. 2, the truss structure 10 is formed by connecting the rod-shaped element 1, the lattice material 13, the upper chord connecting member 14, and the lower chord connecting member 15 with the hub 2. In order to connect the rod-shaped element 1 to the hub 2, as shown in FIG. 4, the connecting end portion 1a of the rod-shaped element 1 is fitted into the connecting groove 2a from the end face side of the hub 2, and the irregularities formed in each are engaged. You can do it. The same applies to the lattice material 13, the upper chord connecting member 14, and the lower chord connecting member 15. As shown in FIG. 10 (b), the connecting end portion 55 of the connecting member 5B to be the upper chord support 50 on the upper floor is fitted into the connecting groove 2a of the hub 2 located at the upper end of the upper chord member 11. Keep it together.

その後、図４に示すように、下弦材１２となるハブ２の上下面に抜止め用のワッシャ２ｃを配置したうえで、ハブ２のボルト挿通孔２ｂにネジ棒Ｂ１を挿通し、ネジ棒Ｂ１の両端をナットＮ１，Ｎ１で締結する。ナットＮ１を締結したら、ハブ２の端面に化粧用のキャップ２ｄを取り付けてナットＮ１を覆い隠す。なお、図７に示すように、支持点Ｓとなるハブ２の下面には、ワッシャ２ｃ（図６参照）に代えて下弦支承体３０を取り付ける。 After that, as shown in FIG. 4, after the retaining washers 2c are arranged on the upper and lower surfaces of the hub 2 that becomes the lower chord member 12, the screw rod B1 is inserted into the bolt insertion hole 2b of the hub 2, and the screw rod B1 Are fastened with nuts N1 and N1. When the nut N1 is fastened, a cosmetic cap 2d is attached to the end surface of the hub 2 to cover the nut N1. In addition, as shown in FIG. 7, the lower chord support 30 is attached to the lower surface of the hub 2 used as the support point S instead of the washer 2c (refer FIG. 6).

ハブ２に下弦支承体３０を取り付ける場合には、連結部材３Ｂをハブ２の下面に固定した後に、束部材３Ｃの上端部を連結部材３Ｂに接続するとよい。ハブ２の下面に連結部材３Ｂを固定するには、図８に示すように、連結部材３Ｂの取付孔３４ａとハブ２のボルト挿通孔２ｂとにネジ棒Ｂ１（図６参照）を挿通し、ネジ棒Ｂ１の両端をナットＮ１，Ｎ１（図６参照）で締結すればよい。なお、束部材３Ｃの上端部を連結部材３Ｂに接続する前に、束部材３Ｃの下端部をベース部材３Ａに接続しておいてもよいし、束部材３Ｃの上端部を連結部材３Ｂに接続した後に、束部材３Ｃの下端部をベース部材３Ａに接続してもよい。 When the lower chord support 30 is attached to the hub 2, the upper end portion of the bundle member 3C may be connected to the connecting member 3B after the connecting member 3B is fixed to the lower surface of the hub 2. In order to fix the connecting member 3B to the lower surface of the hub 2, as shown in FIG. 8, the screw rod B1 (see FIG. 6) is inserted through the mounting hole 34a of the connecting member 3B and the bolt insertion hole 2b of the hub 2, What is necessary is just to fasten both ends of screw rod B1 with nut N1, N1 (refer FIG. 6). Before connecting the upper end portion of the bundle member 3C to the connecting member 3B, the lower end portion of the bundle member 3C may be connected to the base member 3A, or the upper end portion of the bundle member 3C may be connected to the connecting member 3B. After that, the lower end portion of the bundle member 3C may be connected to the base member 3A.

次に、図２に示すように、上弦材１１となる棒状要素１，１に沿って補強材１６を配置するとともに、ハブ２の位置において補強材１６の上面に受け材２１（図６参照）を載置する。その後、図６に示すように、上弦材１１となるハブ２の下面にワッシャ２ｃを配置したうえで、ハブ２のボルト挿通孔２ｂ（図４参照）にその下面側からネジ棒Ｂ１を挿通するとともに、その上端部を受け材２１の内部に突出させ、ネジ棒Ｂ１の両端をナットＮ１，Ｎ１で締結する。このようにすると、補強材１６が、ハブ２の上面と受け材２１の取付面２１ａとに挟持された状態で固定されることになる。ナットＮ１を締結したら、ハブ２の下面に化粧用のキャップ２ｄを取り付けてナットＮ１を覆い隠す。なお、図７に示すように、上弦材１１の下端に位置するハブ２には、その下面に配置されるワッシャ２ｃ（図６参照）に代えて、下階側の上弦支承体４０を取り付ける。 Next, as shown in FIG. 2, the reinforcing material 16 is disposed along the rod-like elements 1, 1 that become the upper chord material 11, and the receiving material 21 (see FIG. 6) on the upper surface of the reinforcing material 16 at the position of the hub 2. Is placed. Thereafter, as shown in FIG. 6, a washer 2 c is arranged on the lower surface of the hub 2 to be the upper chord material 11, and the screw rod B 1 is inserted into the bolt insertion hole 2 b (see FIG. 4) of the hub 2 from the lower surface side. At the same time, the upper end portion of the screw rod B1 is projected into the receiving member 21, and both ends of the screw rod B1 are fastened with nuts N1 and N1. If it does in this way, the reinforcing material 16 will be fixed in the state clamped by the upper surface of the hub 2, and the attachment surface 21a of the receiving material 21. FIG. When the nut N1 is fastened, a cosmetic cap 2d is attached to the lower surface of the hub 2 to cover the nut N1. In addition, as shown in FIG. 7, instead of the washer 2c (refer FIG. 6) arrange | positioned at the lower surface, the upper chord support body 40 of the lower floor side is attached to the hub 2 located in the lower end of the upper chord material 11. As shown in FIG.

ハブ２に下階側の上弦支承体４０を取り付ける場合には、連結部材４Ｂをハブ２の下面に固定した後に、連結部材３Ｂをベース部材４Ｂに接続するとよい。ハブ２の下面に連結部材４Ｂを固定するには、図９に示すように、連結部材４Ｂの取付孔４４ａとハブ２のボルト挿通孔２ｂとにネジ棒Ｂ１（図６参照）を挿通し、ネジ棒Ｂ１の両端をナットＮ１，Ｎ１（図６参照）で締結すればよい。 When the lower string side upper chord support 40 is attached to the hub 2, the connecting member 4B may be connected to the base member 4B after the connecting member 4B is fixed to the lower surface of the hub 2. In order to fix the connecting member 4B to the lower surface of the hub 2, as shown in FIG. 9, the screw rod B1 (see FIG. 6) is inserted through the mounting hole 44a of the connecting member 4B and the bolt insertion hole 2b of the hub 2, What is necessary is just to fasten both ends of screw rod B1 with nut N1, N1 (refer FIG. 6).

トラス構造体１０の構築作業が完了したら、図１１に示すように、トラス構造体１０を階段取付部Ｆ１，Ｆ２間に架設する。トラス構造体１０を架設する場合には、まず、上階の階段取付部Ｆ２に予め固定しておいた上階側の上弦支承体５０のベース部材５Ａにトラス構造体１０に取り付けた連結部材５Ｂを接続する。上階側の上弦支承体５０のベース部材５Ａに連結部材５Ｂを接続すると、支持軸５３（図１０参照）を中心としてトラス構造体１０を上下に旋回させることが可能となるので、トラス構造体１０を簡単に所定の階段勾配に傾斜させることが可能となる。 When the construction work of the truss structure 10 is completed, as shown in FIG. 11, the truss structure 10 is installed between the staircase mounting portions F1 and F2. When the truss structure 10 is to be installed, first, the connecting member 5B attached to the truss structure 10 on the base member 5A of the upper chord support 50 on the upper floor that has been fixed in advance to the staircase attachment portion F2 on the upper floor. Connect. When the connecting member 5B is connected to the base member 5A of the upper chord support 50 on the upper floor side, the truss structure 10 can be turned up and down around the support shaft 53 (see FIG. 10). 10 can be easily inclined to a predetermined step gradient.

次に、下階側の上弦支承体４０のベース部材４Ａを下階の階段取付部Ｆ１に固定し、その後、下弦支承体３０のベース部材３Ａを下階の階段取付部Ｆ１に固定する。なお、束部材３Ｃが、ベース部材３Ａおよび連結部材３Ｂに対して回動可能に接続されているので、図１２に示すように、ベース部材３Ａを階段取付部Ｆ１に固定するまでは、束部材３Ｃを前後方向に傾倒させて束部材３Ｃの傾斜角度を変更することが可能となる。すなわち、束部材３Ｃの高さ寸法の微調整を行うことができる。 Next, the base member 4A of the upper string support body 40 on the lower floor side is fixed to the staircase mounting portion F1 on the lower floor, and then the base member 3A of the lower string support body 30 is fixed to the staircase mounting portion F1 on the lower floor. Since the bundle member 3C is rotatably connected to the base member 3A and the connecting member 3B, as shown in FIG. 12, until the base member 3A is fixed to the stair attachment portion F1, the bundle member It is possible to change the inclination angle of the bundle member 3C by inclining 3C in the front-rear direction. That is, it is possible to finely adjust the height dimension of the bundle member 3C.

トラス構造体１０の架設作業が完了したら、図６に示すように、受け材２１の踏板支持面２１ｂに、ボルトＢ２およびナットＮ２を用いて踏板２０を固定し、さらに、必要に応じて手摺６０（図１参照）を取り付けて階段の構築が完了する。 When the construction work of the truss structure 10 is completed, as shown in FIG. 6, the tread plate 20 is fixed to the tread plate support surface 21 b of the receiving member 21 by using bolts B 2 and nuts N 2, and if necessary, the handrail 60 is used. (See FIG. 1) is attached and the construction of the stairs is completed.

以上説明した本実施形態に係る階段によれば、下弦材１２の下端に位置する接続点を支持する場合（図１３参照）に比べて、トラス構造体１０の支点間距離を短くすることが可能となるので、トラス構造体１０が長尺化しても、その中央部での撓みが大きくならず、かつ、長周期の揺れが発生し難くなる。加えて、本実施形態に係る階段によれば、上弦材１１や下弦材１２を重厚にする必要がないので、軽快な印象を維持しつつ、撓みや長周期の揺れを抑えることが可能となる。 According to the staircase according to the present embodiment described above, the distance between the fulcrums of the truss structure 10 can be shortened compared to the case of supporting the connection point located at the lower end of the lower chord member 12 (see FIG. 13). Therefore, even if the truss structure 10 is elongated, the bending at the central portion does not increase, and long-period fluctuations are less likely to occur. In addition, according to the staircase according to the present embodiment, it is not necessary to make the upper chord member 11 and the lower chord member 12 heavy, so that it is possible to suppress bending and long-period shaking while maintaining a light impression. .

なお、本実施形態に係る階段においては、下弦材１２とラチス材１３との接続点のうち、下端に位置する接続点よりも少なくとも一つ上に位置する接続点を支持点Ｓとしているので、下端に位置する接続点を支持点とした場合（図１３参照）に比べて、支持点Ｓと下階の階段取付部Ｆ１との離間距離が大きくなる傾向にあるが、束部材３Ｃを具備しているので、支持点Ｓと下階の階段取付部Ｆ１との離間距離が大きい場合であっても容易に対応することができる。 In the staircase according to the present embodiment, among the connection points between the lower chord material 12 and the lattice material 13, the connection point located at least one higher than the connection point located at the lower end is used as the support point S. Compared to the case where the connection point located at the lower end is used as a support point (see FIG. 13), the separation distance between the support point S and the staircase attachment portion F1 on the lower floor tends to be larger, but the bundle member 3C is provided. Therefore, even when the separation distance between the support point S and the staircase attachment portion F1 on the lower floor is large, it can be easily handled.

また、本実施形態に係る階段支承体（下弦支承体３０）によると、束部材３Ｃの下端部をピン支持状態でベース部材３Ａに接続するとともに、束部材３Ｃの上端部をピン支持状態で連結部材３Ｂに接続しているので、ベース部材３Ａを階段取付部Ｆ１に固定するまでは、束部材３Ｃを前後方向に傾倒させて束部材３Ｃの傾斜角度を変更することができる。すなわち、束部材３Ｃの高さ寸法（下挿通孔３７ａと上挿通孔３７ｂの高低差）の微調整を行うことができるので、例えば、施工誤差等により階段取付部Ｆ１の高さ位置が異なる場合であっても、容易に対応することが可能となり、さらには、建物ごとに異なる階段の設置状況に容易に対応することが可能となる。 Further, according to the stair support (lower chord support 30) according to the present embodiment, the lower end of the bundle member 3C is connected to the base member 3A in a pin supported state, and the upper end of the bundle member 3C is connected in a pin supported state. Since it is connected to the member 3B, the bundle member 3C can be tilted in the front-rear direction to change the inclination angle of the bundle member 3C until the base member 3A is fixed to the stair attachment portion F1. That is, since the height dimension of the bundle member 3C (the height difference between the lower insertion hole 37a and the upper insertion hole 37b) can be finely adjusted, for example, when the height position of the stair attachment portion F1 is different due to construction errors or the like. Even so, it becomes possible to easily cope with the situation, and furthermore, it becomes possible to easily cope with the installation situation of the stairs which are different for each building.

また、本実施形態に係る階段支承体（下弦支承体３０）によると、束部材３Ｃを長さの異なる他の束部材に取り替えるだけで、高さ寸法を変更することができるので、建物ごとに異なる階段の設置状況に容易に対応することが可能となる。 Moreover, according to the staircase support body (lower chord support body 30) according to the present embodiment, the height dimension can be changed only by replacing the bundle member 3C with another bundle member having a different length. It becomes possible to easily cope with the installation situation of different stairs.

なお、本実施形態では、下階側の上弦支承体４０のベース部材４Ａおよび連結部材４Ｂの寸法・形状を、下弦支承体３０のベース部材３Ａおよび連結部材３Ｂと同一にしたので、構成部品の共用化を図ることができ、その結果、製造コストを削減することが可能となる。 In the present embodiment, the dimensions and shapes of the base member 4A and the connecting member 4B of the upper chord bearing body 40 on the lower floor side are the same as those of the base member 3A and the connecting member 3B of the lower chord bearing body 30. Sharing can be achieved, and as a result, the manufacturing cost can be reduced.

前記した階段の構成は適宜変更しても差し支えない。例えば、本実施形態では、下弦材１２とラチス材１３との接続点のうち、下端に位置する接続点よりも一つ上に位置する接続点（支持点Ｓ）に下弦支承体３０を取り付けた場合を例示したが、これに限定されることはなく、例えば、下端に位置する接続点よりも二つ上に位置する接続点や三つ上に位置する接続点を支持点とし、この支持点に下弦支承体３０を取り付けてもよい。この場合には、図示した束部材３Ｃに代えて、これよりも長い束部材を用いればよい。 The configuration of the staircase described above may be changed as appropriate. For example, in the present embodiment, the lower chord support 30 is attached to the connection point (support point S) located one higher than the connection point located at the lower end among the connection points between the lower chord material 12 and the lattice material 13. However, the present invention is not limited to this. For example, a connection point located two or higher than the connection point located at the lower end is used as a support point, and this support point is defined as a support point. The lower chord support 30 may be attached to the base. In this case, a bundle member longer than this may be used instead of the illustrated bundle member 3C.

また、本実施形態では、ベース部材３Ａと連結部材３Ｂと束部材３Ｃとを具備する下弦支承体３０で、下端に位置する接続点よりも一つ上に位置する接続点（支持点Ｓ）を支持する場合を例示したが、下弦支承体３０とは異なる構成の下弦支承体で支持点Ｓを支持してもよい。すなわち、支持点Ｓを支持可能なものであれば、下弦支承体の形態に特に制限はなく、例えば、束部材３Ｃを省略した形態の下弦支承体（図示略）で支持点Ｓを支持してもよい。束部材３Ｃを省略する場合には、例えば、ベース部材３Ａの下支持部３２を上方に延出させ、連結部材３Ｂの上支持部３５に直に接続すればよい。 In the present embodiment, the lower chord support 30 including the base member 3A, the connecting member 3B, and the bundle member 3C has a connection point (support point S) positioned one higher than the connection point positioned at the lower end. Although the case where it supports is illustrated, you may support the support point S with the lower string support body of a different structure from the lower string support body 30. FIG. That is, as long as the support point S can be supported, the form of the lower chord support is not particularly limited. For example, the support point S is supported by a lower chord support (not shown) in which the bundle member 3C is omitted. Also good. When the bundle member 3C is omitted, for example, the lower support portion 32 of the base member 3A may be extended upward and directly connected to the upper support portion 35 of the connecting member 3B.

また、本実施形態では、逆ハ字状に対向する左右一対のトラス面を具備するトラス構造体１０に下弦支承体３０を取り付けた場合を例示したが、下弦支承体３０を適用可能なトラス構造体１０の形態を限定する趣旨ではない。例えば、図示は省略するが、左右一対のトラス面が平行状態で対向するトラス構造体に下弦支承体３０を取り付けてもよい。 In the present embodiment, the case where the lower string support body 30 is attached to the truss structure body 10 having a pair of left and right truss surfaces opposed to each other in an inverted C shape is illustrated. However, the truss structure to which the lower string support body 30 can be applied. It is not intended to limit the form of the body 10. For example, although not shown, the lower chord support 30 may be attached to a truss structure in which a pair of left and right truss surfaces face each other in a parallel state.

また、本実施形態では、二条の上弦材１１，１１と二条の下弦材１２，１２とを具備する逆さ台形状のトラス構造体１０に下弦支承体３０を取り付けた場合を例示したが、二条の上弦材と一条の下弦材とを具備する逆三角形状のトラス構造体に下弦支承体３０を取り付けても勿論差し支えない。 In the present embodiment, the case where the lower chord support 30 is attached to the inverted trapezoidal truss structure 10 including the two upper chord members 11 and 11 and the two lower chord members 12 and 12 is illustrated. Of course, the lower chord support 30 may be attached to an inverted triangular truss structure including the upper chord member and the lower chord member.

また、本実施形態では、二条の下弦材１２，１２の各々に下弦支承体３０を取り付けた場合を例示したが、一方のみに下弦支承体３０を取り付けた場合であっても、トラス構造体１０の中央部での撓みが大きくならず、かつ、長周期の揺れが発生し難くなる。すなわち、トラス構造体が二条以上の下弦材を具備している場合においては、そのうちの少なくとも一つに下弦支承体３０を取り付ければ、トラス構造体１０の中央部での撓みを抑制し、長周期の揺れを抑制することが可能となる。 In the present embodiment, the case where the lower string support body 30 is attached to each of the two lower chord members 12 and 12 is illustrated, but the truss structure body 10 is provided even when the lower string support body 30 is attached to only one of them. The deflection at the center of the plate does not become large, and long-period shaking hardly occurs. That is, in the case where the truss structure has two or more lower chord members, if the lower chord support 30 is attached to at least one of them, the bending at the central portion of the truss structure 10 is suppressed, and the long period Can be suppressed.

また、前記した階段支承体（下弦支承体３０）の構成も適宜変更しても差し支えない。例えば、本実施形態では、束部材３Ｃの下端部を回動可能にベース部材３Ａに接続し、束部材３Ｃの上端部を回動可能に連結部材３Ｂに接続した場合を例示したが、これに限定されることはなく、束部材３Ｃの下端部を回動不能にベース部材３Ａに接続してもよいし、束部材３Ｃの上端部を回動不能に連結部材３Ｂに接続してもよい。このような構成の階段支承体であっても、束部材を長さの異なる他の束部材に取り替えるだけで、高さ寸法を変更することができるので、建物ごとに異なる階段の設置状況に容易に対応することが可能となる。 Further, the configuration of the above-described staircase support body (lower string support body 30) may be appropriately changed. For example, in the present embodiment, the case where the lower end portion of the bundle member 3C is rotatably connected to the base member 3A and the upper end portion of the bundle member 3C is rotatably connected to the connecting member 3B is exemplified. Without being limited, the lower end of the bundle member 3C may be connected to the base member 3A so as not to rotate, or the upper end of the bundle member 3C may be connected to the connecting member 3B so as not to rotate. Even with a stair support having such a structure, the height can be changed by simply replacing the bundle member with another bundle member having a different length, making it easy to install different staircases for each building. It becomes possible to cope with.

なお、本実施形態に係る階段支承体は、本実施形態に係る階段以外の階段にも使用することもできる。したがって、例えば、前記したトラス構造体１０の上弦材１１のハブ２や下弦材１２の下端に位置するハブ２を、下弦支承体３０と同様の構成を具備する階段支承体で支持してもよい。 In addition, the stair support body which concerns on this embodiment can also be used for stairs other than the stairs which concern on this embodiment. Therefore, for example, the hub 2 located at the lower end of the upper chord member 11 and the lower chord member 12 of the truss structure 10 described above may be supported by a stair support having the same configuration as the lower chord support 30. .

また、本実施形態に係る階段支承体は、踏板を支持する構造体が板状の側桁やささら桁などからなる階段にも使用することができる。すなわち、踏板を支持する構造体の下端部に設けられた支持点と下階の階段取付部との間に、下弦支承体３０と同様の構成を具備する階段支承体を介設してもよい。 Moreover, the stair support body according to the present embodiment can be used for a staircase in which the structure that supports the tread plate is formed of a plate-like side girder, a saddle girder, or the like. That is, a stair support having the same configuration as the lower chord support 30 may be interposed between the support point provided at the lower end of the structure that supports the tread and the stair attachment portion on the lower floor. .

本発明の実施形態に係る階段を示す側面図である。It is a side view which shows the staircase which concerns on embodiment of this invention. トラス構造体を示す斜視図である。It is a perspective view which shows a truss structure. （ａ）は棒状要素の斜視図、（ｂ）棒状要素の上面図、（ｃ）は棒状要素の側面図である。(A) is a perspective view of a rod-shaped element, (b) is a top view of the rod-shaped element, and (c) is a side view of the rod-shaped element. 節点要素を示す斜視図である。It is a perspective view which shows a nodal element. （ａ）はラチス材の斜視図、（ｂ）ラチス材の上面図、（ｃ）はラチス材の側面図である。(A) is a perspective view of a lattice material, (b) a top view of the lattice material, (c) is a side view of the lattice material. 本発明の実施形態に係る階段の拡大側断面図である。It is an expanded side sectional view of the stairs concerning the embodiment of the present invention. 本発明の実施形態に係る階段の下端部を示す拡大側面図である。It is an enlarged side view which shows the lower end part of the staircase which concerns on embodiment of this invention. （ａ）は本発明の実施形態に係る階段支承体を示す分解斜視図、（ｂ）はベース部材の製造方法を示す模式的な斜視図である。(A) is a disassembled perspective view which shows the staircase support body which concerns on embodiment of this invention, (b) is a typical perspective view which shows the manufacturing method of a base member. 下階側の上弦支承体を示す分解斜視図である。It is a disassembled perspective view which shows the upper string support body of a lower floor side. （ａ）は本発明の実施形態に係る階段の上端部を示す拡大側面図、（ｂ）は上階側の上弦支承体を示す分解斜視図である。(A) is an expanded side view which shows the upper end part of the staircase which concerns on embodiment of this invention, (b) is a disassembled perspective view which shows the upper string support body of the upper floor side. トラス構造体の架設方法を説明するための模式的な側面図である。It is a typical side view for demonstrating the construction method of a truss structure. 本発明の実施形態に係る階段支承体の作用を説明するための拡大側面図である。It is an enlarged side view for demonstrating the effect | action of the stair support body which concerns on embodiment of this invention. 従来の階段を示す側面図である。It is a side view which shows the conventional staircase.

Explanation of symbols

１０トラス構造体
１１上弦材
１２下弦材
１３ラチス材
２０踏板
３０下弦支承体（階段支承体）
３Ａベース部材
３Ｂ連結部材
３Ｃ束部材
Ｓ支持点 10 truss structure 11 upper chord material 12 lower chord material 13 lattice material 20 tread plate 30 lower chord support
3A Base member 3B Connecting member 3C Bundle member S Support point

Claims

A truss structure including an upper chord member, a lower chord member, and a plurality of lattice members connecting them;
Treads supported by the truss structure;
A stairs with a lower chord base installed in a staircase mounting portion on the lower floor,
Of the connection points between the lower chord material and the lattice material, the connection point located at least one higher than the connection point located at the lower end is used as a support point, and the support point is supported by the lower chord support. Staircase characterized by.

A stair support body interposed between a support point provided at the lower end of the structure that supports the tread board and the stair mounting portion on the lower floor,
A base member fixed to the staircase mounting portion;
A bundle member standing on the base member;
A staircase support body comprising a connecting member interposed between the bundle member and the support point.

The lower end of the bundle member is connected to the base member in a pin-supported state,
The stair support according to claim 2, wherein an upper end portion of the bundle member is connected to the connecting member in a pin-supported state.