JP7160608B2

JP7160608B2 - stairs with landing

Info

Publication number: JP7160608B2
Application number: JP2018169654A
Authority: JP
Inventors: 健一坪井; 耕造岡田; 智史飯塚
Original assignee: Bunka Shutter Co Ltd
Current assignee: Bunka Shutter Co Ltd
Priority date: 2018-09-11
Filing date: 2018-09-11
Publication date: 2022-10-25
Anticipated expiration: 2038-09-11
Also published as: JP2020041335A

Description

本発明は、階段部分が踊り場を介して折り返す構成の踊り場付き階段に関する。 TECHNICAL FIELD The present invention relates to a staircase with a landing in which a staircase portion is folded back through the landing.

階段部分が踊り場を介して折り返すように構成された踊り場付き階段が知られている（特許文献１参照）。
当該踊り場付き階段は、踊り場の支持枠が、一方の桁と、当該の一方の桁と間隔を隔てて平行に対向するように設けられた他方の桁と、前記一方の桁と前記他方の桁との間においてこれら桁と平行となるように配置された補強桁と、これら各桁の一端同士を繋ぐ一端側梁とを備え、各桁の他端が壁パネルの縦材及び継ぎ材に連結された構成となっている。
そして、踊り場の支持枠の一方の桁に、踊り場から下方に延長するように設けられる下側階段部分のササラ桁と呼ばれる桁と、踊り場から上方に延長するように設けられる上側階段部分のササラ桁と呼ばれる桁とが、ボルト止めにより連結され、さらに、踊り場の支持枠の他方の桁に、当該他方の桁の下方に設けられて当該他方の桁を支持する複数の支柱が連結された構成となっている。 A staircase with a landing is known, in which a staircase portion is folded back through the landing (see Patent Document 1).
The staircase with a landing, wherein the support frame of the landing comprises one girder, the other girder provided so as to face the one girder in parallel with a gap, and the one girder and the other girder. and one end side beam that connects one end of each girder, and the other end of each girder is connected to the vertical member and joint member of the wall panel. It is configured as
Then, on one of the girders of the support frame of the landing, there is a girder called a Sasara girder of the lower staircase portion that extends downward from the landing, and a Sasara girder of the upper staircase portion that extends upward from the landing. The girders called are connected by bolts, and the other girder of the landing support frame is connected to a plurality of struts that are provided below the other girder and support the other girder. It's becoming

特開平６－２６１５９号公報JP-A-6-26159

しかしながら、上述した従来の踊り場付き階段では、踊り場の支持枠の他方の桁（階段部分のササラ桁が連結されていない側の桁、即ち、階段部分から遠い側の桁）の下方に複数の支柱が設けられた構造であるので、当該支柱が邪魔となって当該踊り場下の領域を有効に活用できないという課題があった。 However, in the above-described conventional stairs with a landing, a plurality of struts are provided below the other girder of the support frame of the landing (the girder on the side to which the Sasara girder of the stair portion is not connected, that is, the girder on the far side from the stair portion). However, there is a problem that the area under the landing cannot be effectively used because the support is an obstacle.

本発明は、上記課題を解消すべく、踊り場下の領域を有効に活用できるように構成された踊り場付き階段を提供するものである。 SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a staircase with a landing configured to effectively utilize the area under the landing.

本発明に係る踊り場付き階段は、階段部分が踊り場を介して折り返すように構成された踊り場付き階段において、前記踊り場の一方の桁に、前記踊り場から下方に延長するように設けられる下側階段部分の桁と、前記踊り場から上方に延長するように設けられる上側階段部分の桁と、前記踊り場の一方の桁の下方に設けられた支柱とが連結され、前記支柱は１本のみ設けられ、当該支柱の上端が前記踊り場の一方の桁の延長方向の中央部に連結され、前記支柱の上端部と前記踊り場の一方の桁の延長方向の中央部とが連結部材を介して連結されるとともに、当該連結部材が建物の躯体に連結されたことを特徴とする。
本発明に係る踊り場付き階段は、以上のように構成されたことにより、踊り場下の領域を有効に活用できるように構成された踊り場付き階段となるとともに、一方の桁を有した踊り場の支持枠とササラ桁と支柱とが一体化された踊り場付き階段の骨組構造が建物の躯体に連結されることにより、安定な踊り場付き階段の骨組構造を構築できる。
また、前記踊り場は、床材と、当該床材を支持する支持枠とを備え、前記支持枠は、前記一方の桁と、当該の一方の桁と間隔を隔てて対向するように設けられた他方の桁と、前記一方の桁の一端側と前記他方の桁の一端側とを繋ぐ一端側梁と、前記一方の桁の他端側と前記他方の桁の他端側とを繋ぐ他端側梁と、前記一方の桁の中央側と前記他方の桁の中央側とを繋ぐ中央側補強部とを備えて構成されたことを特徴とするので、踊り場の強度を上げることができ、揺れ防止効果の高い踊り場を構築できるようになる。
また、階段部分の桁が、平板と、この平板に部材を取付けるためのねじ止め部とを備え、前記ねじ止め部は、前記平板の板面に取付けられた取付部と、前記平板の板面と所定間隔を隔てて対向する板面を有して前記平板の板厚よりも薄厚の薄板平板部と、当該薄板平板部に形成されたブラインドナット取付用貫通孔と、当該ブラインドナット取付用貫通孔に取付けられたブラインドナットとを備え、ねじが、前記部材に形成されたねじ貫通孔を貫通してかつ前記ブラインドナットに螺着されることによって、前記部材が前記薄板平板部に取付けられたことを特徴とするので、桁の薄板化が図れるとともに、この桁へのねじ止め部を簡単に製作できる。 A staircase with a landing according to the present invention is a staircase with a landing configured such that the staircase portion folds back through the landing, and a lower stair portion is provided on one girder of the landing so as to extend downward from the landing. A girder, a girder of the upper stair portion provided to extend upward from the landing, and a support provided below one girder of the landing are connected, and only one support is provided, and the The upper end of the support is connected to the center in the extension direction of one of the girders of the landing, and the upper end of the support and the center of the one of the girders of the landing in the extension direction are connected via a connecting member, The connecting member is connected to the skeleton of the building .
The staircase with a landing according to the present invention is configured as described above, so that the staircase with a landing is constructed so as to effectively utilize the area under the landing, and the support frame for the landing has one girder. A stable frame structure of a staircase with a landing can be constructed by connecting the frame structure of the staircase with a landing, in which the sasara girder and the struts are integrated, to the skeleton of the building .
In addition, the landing includes a flooring material and a support frame for supporting the flooring material, and the support frame is provided to face the one girder and the one girder with a gap therebetween. the other girder, one end side beam that connects the one end side of the one girder and the one end side of the other girder, and the other end that connects the other end side of the one girder and the other end side of the other girder Since it is characterized by comprising a side sill and a center side reinforcing portion that connects the center side of the one girder and the center side of the other girder, the strength of the landing can be increased, and the shaking can be prevented. You will be able to build a landing with a high prevention effect.
In addition, the girders of the staircase portion include a flat plate and a screwing portion for attaching a member to the flat plate, and the screwing portion includes a mounting portion attached to a plate surface of the flat plate and a plate surface of the flat plate. A thin plate flat portion having a plate surface facing at a predetermined interval and having a thickness thinner than the plate thickness of the flat plate, a blind nut mounting through hole formed in the thin plate flat plate portion, and the blind nut mounting through hole and a blind nut attached to the hole, wherein the member is attached to the thin flat plate portion by a screw passing through a screw through hole formed in the member and screwed into the blind nut. As a result, it is possible to reduce the thickness of the girders and to easily manufacture the screwed portions for the girders.

踊り場付き階段の外観図であり、（ａ)は平面図、（ｂ）は左側面図、（ｃ)は正面図、（ｄ）は右側面図（実施形態１）。It is an external view of stairs with a landing, (a) is a top view, (b) is a left view, (c) is a front view, (d) is a right view (Embodiment 1). 踊り場付き階段の鉄骨骨格（フレーム）構造を示す平面図（実施形態１）。The top view which shows the steel frame (frame) structure of stairs with a landing (Embodiment 1). 踊り場付き階段の鉄骨骨格構造を示す斜視図（実施形態１）。The perspective view which shows the steel-frame frame structure of stairs with a landing (Embodiment 1). 踊り場付き階段の鉄骨骨格構造を示す分解斜視図（実施形態１）。1 is an exploded perspective view showing a steel frame structure of a staircase with a landing (Embodiment 1). FIG. ササラ桁への部材取付構造を示し、（ａ)は正面図、（ｂ）は断面図（実施形態２）。The member attachment structure to a Sasara girder is shown, (a) is a front view, (b) is sectional drawing (Embodiment 2). （ａ)は階段部分と躯体との接続構造を示す断面図（実施形態３）、（ｂ)は準耐火仕様構造の階段廊下部分の側面図（実施形態４）、（ｃ)はリブ付き鉄板の平面図（実施形態４）、（ｄ)はリブ付き鉄板の側面図（実施形態４）。(a) is a cross-sectional view showing the connection structure between the staircase and the frame (Embodiment 3), (b) is a side view of the stairway part of the quasi-fireproof specification structure (Embodiment 4), and (c) is an iron plate with ribs. (Embodiment 4), and (d) is a side view of a ribbed iron plate (Embodiment 4).

実施形態１
図１に示すように、実施形態１に係る踊り場付き階段は、階段部分１が踊り場２を介して折り返すように構成された鉄骨骨組（フレーム）構造の踊り場付き階段である。
即ち、階段部分１が下階と上階との間を繋ぐ下側階段部分１Ａと上側階段部分１Ｂとを備え、踊り場２が下側階段部分１Ａと上側階段部分１Ｂとの間に設けられている。
つまり、下側階段部分１Ａが下階から斜め上方向に延長して踊り場２に到達した後、踊り場２から折り返して上側階段部分１Ｂが下側階段部分１Ａの傾斜方向とは反対方向である斜め上方向に延長して上階に到達するように構成された踊り場付き階段である。 Embodiment 1
As shown in FIG. 1 , the landing staircase according to Embodiment 1 is a landing staircase having a steel frame structure in which a stair portion 1 is folded back through a landing 2 .
That is, the staircase portion 1 includes a lower staircase portion 1A and an upper staircase portion 1B connecting the lower and upper floors, and a landing 2 is provided between the lower staircase portion 1A and the upper staircase portion 1B. there is
In other words, after the lower staircase portion 1A extends obliquely upward from the lower floor and reaches the landing 2, the upper staircase portion 1B turns back from the landing 2 and the upper staircase portion 1B is diagonally opposite to the inclination direction of the lower staircase portion 1A. It is a staircase with a landing configured to extend upward to reach an upper floor.

実施形態１に係る踊り場付き階段における鉄骨骨組構造では、図４に示すように、階段部分１のササラ桁１１と呼ばれる桁と、踊り場２の支持枠２０と、支柱３とが個別に製作され、これら個別に製作された階段部分１のササラ桁１１と、踊り場２の支持枠２０と、支柱３とが、互いにボルトＢ及びナットＮによる機械的接合によって連結されている。
つまり、実施形態１に係る踊り場付き階段における鉄骨骨組構造は、図２，図３に示すように、階段部分１の骨組を構成する左右一対のササラ桁１１，１１と、踊り場２の骨組を構成する支持枠２０と、支柱３とを備える。
そして、踊り場２の支持枠２０の一方の桁２１に、踊り場２から斜め下方に延長するように設けられる下側階段部分１Ａの左右一対のササラ桁１１，１１と、踊り場２から斜め上方に延長するように設けられる上側階段部分１Ｂの左右一対のササラ桁１１，１１と、支柱３とが、ボルトＢ及びナットＮによる機械的接合によって連結されている。換言すれば、図１（ｂ），（ｄ）に示すように、踊り場２の他方の桁２２（階段部分１のササラ桁１１が連結されていない側の桁）の下方に支柱３を設けないようにしたことにより、踊り場２の下の領域Ｘを有効活用できるように構成されている。 In the steel frame structure of the stairs with a landing according to Embodiment 1, as shown in FIG. The sasara girder 11 of the step portion 1, the support frame 20 of the landing 2, and the strut 3, which are individually manufactured, are connected to each other by mechanical joints using bolts B and nuts N. As shown in FIG.
That is, as shown in FIGS. 2 and 3, the steel frame structure of the staircase with a landing according to the first embodiment comprises a pair of left and right Sasara girders 11, 11 forming the frame of the stair portion 1 and the frame of the landing 2. A support frame 20 and a column 3 are provided.
A pair of left and right sasara girders 11, 11 of the lower stair portion 1A, which are provided on one girder 21 of the support frame 20 of the landing 2 so as to extend obliquely downward from the landing 2, and extend obliquely upward from the landing 2. A pair of left and right sasara girders 11, 11 of the upper staircase portion 1B provided so as to be connected to the support column 3 are mechanically joined by bolts B and nuts N. As shown in FIG. In other words, as shown in FIGS. 1(b) and 1(d), no post 3 is provided below the other girder 22 of the landing 2 (the girder on the side where the Sasara girder 11 of the stair portion 1 is not connected). By doing so, the area X under the landing 2 can be effectively utilized.

図１（ａ）に示すように、階段部分１は、左右一対のササラ桁１１，１１と、左右一対のササラ桁１１，１１間に設けられた段部構成部品１２と、ササラ桁１１より立ち上がるように設けられた手摺１３とを備えて構成される。 As shown in FIG. 1( a ), the staircase portion 1 consists of a pair of left and right Sasara girders 11 , 11 , a step component 12 provided between the pair of left and right Sasara girders 11 , 11 , and rises from the Sasara girders 11 . It is configured with a handrail 13 provided as follows.

図３，図４に示すように、ササラ桁１１は、長尺な鋼材、例えば、ウェブ（長尺基板）と、当該ウェブの短手方向の両端より同方向に直角に延長して板面同士が平行に対向するフランジとを備えた断面コ字形状のチャンネルと呼ばれる溝形鋼により構成される。 As shown in FIGS. 3 and 4, the sasara girder 11 includes a long steel material, for example, a web (long substrate), and extends perpendicularly in the same direction from both ends of the web (long substrate) to form a plate surface between the plate surfaces. It consists of a channel steel called a channel with a U-shaped cross section with parallel opposed flanges.

図１（ａ）に示すように、段部構成部品１２は、例えば、板面が水平面となるように設置される複数の踏板１５，１５…と、板面が垂直面となるように設置される複数の蹴込板１６，１６…とで構成される。
各踏板１５，１５…の左右の両端側が、踏板連結部材１７（図２参照）、図外のボルト及ナット等の固定手段により、左右のササラ桁１１，１１に連結されている。
そして、例えば上下の踏板１５，１５に蹴込板１６が取付けられ、１つの踏板１５と１つの蹴込板１６との組で１段が形成される。尚、下側階段部分１Ａの上端側に位置する蹴込板１６、上側階段部分１Ｂの下端側に位置する蹴込板１６は、後述する支持枠２０の一方の桁２１にボルトＢ及びナットＮにより取付けられた連結部材１８（図２参照）を介して一方の桁２１に図外のボルト及びナット等で連結される。
このように構成された踏板１５と蹴込板１６との組が、傾斜方向に沿って多数段連続するように設けられて階段部分１の段部が構成される。 As shown in FIG. 1(a), the stepped part component 12 includes, for example, a plurality of treads 15, 15 . It is composed of a plurality of risers 16, 16, . . .
The left and right ends of each of the footboards 15, 15 are connected to the left and right sasara beams 11, 11 by means of fixing means such as footboard connecting members 17 (see FIG. 2) and bolts and nuts (not shown).
For example, a riser 16 is attached to the upper and lower treads 15, 15, and a set of one tread 15 and one riser 16 forms one step. The riser 16 located at the upper end of the lower staircase portion 1A and the riser 16 located at the lower end of the upper staircase portion 1B are attached to one girder 21 of the support frame 20, which will be described later, with bolts B and nuts N. It is connected to one of the girders 21 via a connecting member 18 (see FIG. 2), which is connected by means of bolts, nuts, etc. (not shown).
A set of the treads 15 and the risers 16 configured in this manner is provided so as to be continuous in a number of steps along the direction of inclination, thereby forming the step portion of the staircase portion 1 .

図１（ａ）に示すように、踊り場２は、支持枠２０と、当該支持枠２０の上に複数の床材３１が並ぶように設置されて構成された床３０と、支持枠２０の周縁より立ち上がるように設けられた手摺４０とを備えて構成される。 As shown in FIG. 1( a ), the landing 2 includes a support frame 20 , a floor 30 configured by arranging a plurality of floor materials 31 on the support frame 20 , and a peripheral edge of the support frame 20 . and a handrail 40 provided to stand up more.

図２乃至図４に示すように、踊り場２の支持枠２０は、一方の桁２１と、当該の一方の桁２１と間隔を隔てて平行に対向するように設けられた他方の桁２２と、一方の桁２１の延長方向の一端側と他方の桁２２の延長方向の一端側とを繋ぐ一端側梁２３と、一方の桁２１の延長方向の他端側と他方の桁２２の延長方向の他端側とを繋ぐ他端側梁２４と、一方の桁２１の延長方向の中央側と他方の桁２２の延長方向の中央側とを繋ぐ中央側補強部２５と、床材支持構造部２６と、ブレース補強構造部２７とを備える。
即ち、踊り場２の支持枠２０は、一方の桁２１と他方の桁２２と一端側梁２３と他端側梁２４とで構成された長方形枠と、当該長方形枠内に構築された中央側補強部２５と床材支持構造部２６とブレース補強構造部２７とを備えた構成である。

As shown in FIGS. 2 to 4, the support frame 20 of the landing 2 includes one girder 21, the other girder 22 provided so as to face the one girder 21 in parallel with a gap, One end side beam 23 connecting one end side in the extending direction of one girder 21 and one end side in the extending direction of the other girder 22, and the other end side in the extending direction of one girder 21 and the extending direction of the other girder 22 The other end side beam 24 that connects the other end side, the center side reinforcing portion 25 that connects the center side in the extending direction of one girder 21 and the center side in the extending direction of the other girder 22, and the floor material support structure portion 26 and a brace reinforcement structure 27 .
That is, the support frame 20 of the landing 2 includes a rectangular frame composed of one girder 21, the other girder 22, one end side beam 23, and the other end side beam 24, and a center side reinforcement built in the rectangular frame. It is a structure including a portion 25 , a flooring support structure portion 26 and a brace reinforcement structure portion 27 .

支持枠２０における一方の桁２１、他方の桁２２、一端側梁２３、他端側梁２４は、長尺な鋼材、例えば、上述した溝形鋼により構成される。 One girder 21, the other girder 22, the one end side beam 23, and the other end side beam 24 of the support frame 20 are made of a long steel material such as channel steel described above.

図３に示すように、一方の桁２１及び他方の桁２２は、例えば溝形鋼のウェブと上下のフランジとで囲まれた形成された凹部同士が向かい合うように所定の間隔を隔てて平行に配置される。
一端側梁２３及び他端側梁２４は、例えば溝形鋼のウェブと上下のフランジとで囲まれて形成された凹部同士が向かい合わないように所定の間隔を隔てて平行に配置される。 As shown in FIG. 3, one girder 21 and the other girder 22 are arranged parallel to each other at a predetermined distance so that recesses formed by, for example, channel steel webs and upper and lower flanges face each other. placed.
The one-end beam 23 and the other-end beam 24 are arranged parallel to each other at a predetermined interval so that recesses formed by, for example, channel steel webs and upper and lower flanges do not face each other.

図２乃至図４に示すように、一方の桁２１の延長方向の一端には連結片３３が溶接等により取付けられ、当該連結片３３と一端側梁２３の一端側のウェブとがボルトＢ及びナットＮで連結されることにより、一方の桁２１の一端と一端側梁２３の一端とが連結される。尚、図３，図４では、ボルトＢ及びナットＮの図示を省略してある。
また、一方の桁２１の延長方向の他端には連結片３４が溶接等により取付けられ、当該連結片３４と他端側梁２４の一端側のウェブとがボルトＢ及びナットＮで連結されることにより、一方の桁２１の他端と他端側梁２４の一端とが連結される。
また、他方の桁２２の延長方向の一端には連結片３５が溶接等により取付けられ、当該連結片３５と一端側梁２３の他端側のウェブとがボルトＢ及びナットＮで連結されることにより、他方の桁２２の一端と一端側梁２３の他端とが連結される。
また、他方の桁２２の延長方向の他端には連結片３６が溶接等により取付けられ、当該連結片３６と他端側梁２４の他端側のウェブとがボルトＢ及びナットＮで連結されることにより、他方の桁２２の他端と他端側梁２４の他端とが連結される。 As shown in FIGS. 2 to 4, a connecting piece 33 is attached to one end in the extending direction of one girder 21 by welding or the like. One end of the one girder 21 and one end of the one end side beam 23 are connected by connecting with the nut N. As shown in FIG. 3 and 4, illustration of the bolt B and the nut N is omitted.
A connecting piece 34 is attached to the other end in the extending direction of one girder 21 by welding or the like, and the connecting piece 34 and the web on one end side of the other end side beam 24 are connected with bolts B and nuts N. Thus, the other end of one girder 21 and one end of the other end beam 24 are connected.
A connecting piece 35 is attached to one end of the other girder 22 in the extending direction by welding or the like, and the connecting piece 35 and the web on the other end side of the one end side beam 23 are connected by bolts B and nuts N. , one end of the other girder 22 and the other end of the one end beam 23 are connected.
A connecting piece 36 is attached to the other end of the other girder 22 in the extending direction by welding or the like. Thus, the other end of the other girder 22 and the other end of the other end beam 24 are connected.

図２乃至図４に示すように、一方の桁２１及び他方の桁２２の凹部の底面となるウェブの面には、後述する補強材５０の端部、根太５５の端部、ブレース６０の端部を連結するためのガセットプレート５１，５２，５６，５７：５８，５９等の連結プレートが溶接等により取付けられている。 As shown in FIGS. 2 to 4, on the surface of the web serving as the bottom surface of the recesses of the one girder 21 and the other girder 22, end portions of the reinforcing member 50, end portions of the joists 55, and ends of the braces 60, which will be described later, are provided. Connecting plates such as gusset plates 51, 52, 56, 57, 58, 59 for connecting the parts are attached by welding or the like.

図２及び図３に示すように、中央側補強部２５は、一端側梁２３と他端側梁２４との間の中央側位置において、これら一端側梁２３及び他端側梁２４と平行に設置されて、一端部が一方の桁２１の延長方向の中央側に設けられたガセットプレート５１にボルトＢ及びナットＮで連結されて、他端部が他方の桁２２の延長方向の中央側に設けられたガセットプレート５２にボルトＢ及びナットＮで連結された複数の補強材５０，５０…により構成される。 As shown in FIGS. 2 and 3 , the central reinforcing portion 25 extends parallel to the one end beam 23 and the other end beam 24 at a central position between the one end beam 23 and the other end beam 24 . One end is connected to a gusset plate 51 provided on the center side in the extending direction of one girder 21 with a bolt B and a nut N, and the other end is connected to the center side in the extending direction of the other girder 22. It is composed of a plurality of reinforcing members 50, 50, .

中央側補強部２５を構成する補強材５０は、長尺な鋼材、例えば、断面Ｃ字形状のシーチャンネルと呼ばれるリップ溝形鋼により構成され、長尺方向の一端が一方の桁２１に連結され、長尺方向の他端が他方の桁２２に連結される。 The reinforcing member 50 constituting the central reinforcing portion 25 is made of a long steel material, for example, a lip channel steel called a sea channel having a C-shaped cross section, and one end in the long direction is connected to one girder 21. , the other end in the longitudinal direction is connected to the other girder 22 .

中央側補強部２５は、例えば、一方の桁２１及び他方の桁２２に連結された２本の補強材５０，５０により構成される。即ち、互いのウェブが僅かな間隔を隔てて対向して、かつ、一方の桁２１の延長方向の中央側と他方の桁２２の延長方向の中央側とを繋ぐように連結された２本の補強材５０，５０により構成される。
例えば、２本の補強材５０，５０の一端側のウェブが一方の桁２１の延長方向に中央側に設けられたガセットプレート５１を挟み込むように配置されて、これら補強材５０，５０のウェブ及びガセットプレート５１がボルトＢ及びナットＮで連結される。
同様に、２本の補強材５０，５０の他端側のウェブが他方の桁２２の延長方向に中央側に設けられたガセットプレート５２を挟み込むように配置されて、これら補強材５０，５０のウェブ及びガセットプレート５２がボルトＢ及びナットＮで連結される。
以上のように、２本の補強材５０，５０が、ガセットプレート５１，５２を介して一方の桁２１の延長方向の中央側及び他方の桁２２の延長方向に中央側に固定されることで、中央側補強部２５が構成される。 The central reinforcing portion 25 is composed of, for example, two reinforcing members 50 , 50 connected to one girder 21 and the other girder 22 . That is, the two webs are connected to each other so as to face each other with a small gap and to connect the central side in the extending direction of one girder 21 and the central side in the extending direction of the other girder 22. It is composed of reinforcing members 50 , 50 .
For example, the webs of the two reinforcing members 50, 50 on one end side are arranged so as to sandwich the gusset plate 51 provided on the central side in the extending direction of one of the beams 21, and the webs of the reinforcing members 50, 50 and Gusset plates 51 are connected by bolts B and nuts N.
Similarly, the web on the other end side of the two reinforcing members 50, 50 is arranged so as to sandwich the gusset plate 52 provided on the center side in the extending direction of the other girder 22. Web and gusset plate 52 are connected by bolts B and nuts N.
As described above, the two reinforcing members 50, 50 are fixed via the gusset plates 51, 52 to the central side in the extending direction of one girder 21 and to the central side in the extending direction of the other girder 22. , the central reinforcing portion 25 is formed.

床材支持構造部２６は、一端側梁２３と中央側補強部２５との間に設置された複数の根太５５，５５…により構成された下側階段部分側の床材支持構造部２８と、他端側梁２４と中央側補強部２５との間に設置された複数の根太５５，５５…により構成された上側階段部分側の床材支持構造部２９とを備えて構成される。 The floor material support structure 26 includes a floor material support structure 28 on the side of the lower stair portion, which is composed of a plurality of joists 55, 55, . . . A floor support structure 29 on the side of the upper stair portion is provided between the beam 24 on the other end side and the reinforcing portion 25 on the center side and is composed of a plurality of joists 55, 55 .

床材支持構造部２６を形成する根太５５は、長尺な鋼材、例えば、上述したリップ溝形鋼により構成され、長尺方向の一端が一方の桁２１に連結され、長尺方向の他端が他方の桁２２に連結される。 The joist 55 forming the floor material support structure 26 is made of a long steel material, for example, the lip channel steel described above. is connected to the other girder 22 .

下側階段部分側の床材支持構造部２８は、例えば、中央側補強部２５に近い位置において中央側補強部２５と平行に並ぶように設けられた根太５５と、一端側梁２３に近い位置において一端側梁２３と平行に並ぶように設けられた根太５５とで構成される。
同様に、上側階段部分側の床材支持構造部２９は、例えば、中央側補強部２５に近い位置において中央側補強部２５と平行に並ぶように設けられた根太５５と、他端側梁２４に近い位置において他端側梁２４と平行に並ぶように設けられた根太５５とで構成される。 The floor material support structure 28 on the lower stair portion side includes, for example, a joist 55 arranged parallel to the central reinforcing portion 25 at a position close to the central reinforcing portion 25, and a position close to the one end side beam 23. It is composed of a joist 55 provided so as to be aligned in parallel with the one end side beam 23 at the end.
Similarly, the floor material support structure 29 on the upper stair portion side includes, for example, a joist 55 provided so as to be aligned parallel to the central reinforcing portion 25 at a position close to the central reinforcing portion 25, and the other end side beam 24 and a joist 55 provided so as to be parallel to the other end beam 24 at a position close to .

各根太５５，５５…の一端は、一方の桁２１に設けられたガセットプレート５６にボルトＢ及びナットＮにより連結され、各根太５５，５５…の他端は、他方の桁２２に設けられたガセットプレート５７にボルトＢ及びナットＮにより連結されている。
そして、支持枠２０の上に複数の床材３１が並ぶように設置されて、複数の床材３１と根太５とが図外の連結部材によって連結されたことにより、支持枠２０の上に床３０が構成される。 One end of each joist 55, 55 . It is connected to the gusset plate 57 by bolts B and nuts N. As shown in FIG.
A plurality of floor materials 31 are arranged on the support frame 20, and the plurality of floor materials 31 and the floor joist 5 are connected by connecting members (not shown). 30 is configured.

ブレース補強構造部２７は、下側階段部分側のブレース補強構造部２７Ａと、上側階段部分側のブレース補強構造部２７Ｂとを備える。
下側階段部分側のブレース補強構造部２７Ａは、下側階段部分側の床材支持構造部２８を構成する一対の根太５５，５５と一方の桁２１と他方の桁２２とで囲まれた四角枠の対角線上に配置されて、例えば、一端が一方の桁２１のガセットプレート５８に連結されて他端が他方の桁２２のガセットプレート５９に連結されたブレース６０により構成される。
同様に、上側階段部分側のブレース補強構造部２７Ｂは、上側階段部分側の床材支持構造部２９を構成する一対の根太５５，５５と一方の桁２１と他方の桁２２とで囲まれた四角枠の対角線上に配置されて、例えば、一端が一方の桁２１の中央側のガセットプレート５８に連結されて他端が他方の桁２２のガセットプレート５９に連結されたブレース６０により構成される。 The brace reinforcement structure 27 comprises a brace reinforcement structure 27A on the side of the lower step portion and a brace reinforcement structure 27B on the side of the upper step portion.
The brace reinforcement structure 27A on the lower stair portion side is a square surrounded by a pair of joists 55, 55 and one girder 21 and the other girder 22 that constitute the floor material support structure 28 on the lower stair portion side. Arranged diagonally on the frame, for example, braces 60 are connected at one end to the gusset plate 58 of one girder 21 and at the other end to the gusset plate 59 of the other girder 22 .
Similarly, the brace reinforcement structure 27B on the upper stair portion side is surrounded by a pair of joists 55, 55, one girder 21, and the other girder 22 that constitute the floor material support structure 29 on the upper stair portion side. The braces 60 are arranged on the diagonal line of the square frame, and are composed of, for example, one end connected to the gusset plate 58 on the center side of one girder 21 and the other end connected to the gusset plate 59 of the other girder 22 . .

ブレース補強構造部２７を形成するブレース６０は、長尺な鋼材、例えば、断面Ｌ字形状のアングルと呼ばれる山形鋼により構成され、長尺方向の一端が一方の桁２１に連結され、長尺方向の他端が他方の桁２２に連結される。
当該ブレース補強構造部２７を備えたので、支持枠の変形を防止でき、支持枠の強度を上げることができる。 The brace 60 forming the brace reinforcing structure 27 is made of a long steel material, for example, an angle steel called an angle having an L-shaped cross section. is connected to the other girder 22 .
Since the brace reinforcing structure portion 27 is provided, deformation of the support frame can be prevented and the strength of the support frame can be increased.

支柱３は、例えば、角型鋼管により形成され、上端部が踊り場２の支持枠２０の一方の桁２１の延長方向の中央部に連結部材７０（図４参照）を介して連結され、下端が例えばコンクリート基礎を介して地盤に固定される。 The column 3 is formed of, for example, a square steel pipe, the upper end is connected to the center of the extension direction of one girder 21 of the support frame 20 of the landing 2 via a connecting member 70 (see FIG. 4), and the lower end is For example, it is fixed to the ground via a concrete foundation.

図４に示すように、連結部材７０は、断面Ｌ字状に形成されたＬ型連結部材７１と、支柱３の上端に水平面７２ａを形成するために当該支柱３の上端部に溶接された平板７２とを備えて構成される。
まず、一方の桁２１の延長方向の中央部と対向する躯体８０にＬ型連結部材７１の垂直板部７１ａをアンカーボルト等の固定具７３（図２参照）で固定しておく。そして、躯体８０に固定されたＬ型連結部材７１の水平板部７１ｂを一方の桁２１の下フランジの下面と支柱３の上端の水平面７２ａとの間に挟んだ状態で、これら支柱３の上端に溶接された平板７２とＬ型連結部材７１の水平板部７１ｂと一方の桁２１の下フランジとが図外のボルト及びナットで連結されることにより、一方の桁２１及び支柱３が、連結部材７０を介して躯体８０に連結された構成となっている。
このように、支柱３の上端部と踊り場２の支持枠２０の一方の桁２１の延長方向の中央部とが連結部材７０を介して連結されるとともに、当該連結部材７０が建物の躯体８０に連結されたので、一方の桁２１を有した踊り場２の支持枠２０とササラ桁１１と支柱３とが一体化された踊り場付き階段の鉄骨骨組構造が建物の躯体８０に連結された構成となり、安定な踊り場付き階段の鉄骨骨組構造を構築できる。 As shown in FIG. 4, the connection member 70 includes an L-shaped connection member 71 having an L-shaped cross section and a flat plate welded to the upper end of the support 3 to form a horizontal surface 72a on the upper end of the support 3 . 72.
First, the vertical plate portion 71a of the L-shaped connecting member 71 is fixed to the frame 80 facing the central portion in the extending direction of one of the girders 21 with a fixture 73 such as an anchor bolt (see FIG. 2). Then, the horizontal plate portion 71b of the L-shaped connecting member 71 fixed to the frame 80 is sandwiched between the lower surface of the lower flange of one girder 21 and the horizontal surface 72a of the upper end of the support 3, and the upper end of the support 3 is mounted. The flat plate 72 welded to the L-shaped connecting member 71, the horizontal plate portion 71b of the L-shaped connecting member 71, and the lower flange of one girder 21 are connected by bolts and nuts (not shown), so that the one girder 21 and the strut 3 are connected It is configured to be connected to the frame 80 via the member 70 .
In this way, the upper end portion of the support column 3 and the central portion of the extension direction of one girder 21 of the support frame 20 of the landing 2 are connected via the connecting member 70, and the connecting member 70 is connected to the building skeleton 80. Since it is connected, the steel frame structure of the stairs with landing in which the support frame 20 of the landing 2 having one girder 21, the Sasara girder 11 and the support 3 are integrated is connected to the building frame 80, A steel frame structure of stable landing stairs can be constructed.

図４に示すように、下側階段部分１Ａの上り進行方向左側に位置する左のササラ桁１１の上端には、一端側梁２３の一端側に連結される連結部６１が溶接等により取付けられる。そして、図３に示すように、当該連結部６１と一端側梁２３の一端側とが図外のボルト及びナットで連結されることにより、左のササラ桁１１と一端側梁２３とが連結される。
同様に、下側階段部分１Ａの上り進行方向右側に位置する右のササラ桁１１の上端には、一方の桁２１の延長方向の中央側に連結される連結部６２が溶接等により取付けられる。そして、当該連結部６２と一方の桁２１の延長方向の中央側とが図外のボルト及びナットで連結されることにより、右のササラ桁１１と一方の桁２１とが連結される。
同様に、上側階段部分１Ｂの上り進行方向左側に位置する左のササラ桁１１の下端には、他端側梁２４の一端側に連結される連結部６３が溶接等により取付けられる。そして、当該連結部６３と他端側梁２４の一端側とが図外のボルト及びナットで連結されることにより、左のササラ桁１１と他端側梁２４とが連結される。
同様に、上側階段部分１Ｂの上り進行方向右側に位置する右のササラ桁１１の下端には、一方の桁２１の延長方向の中央側に連結される連結部６４が溶接等により取付けられる。そして、当該連結部６４と一方の桁２１の延長方向の中央側とが図外のボルト及びナットで連結されることにより、右のササラ桁１１と一方の桁２１とが連結される。 As shown in FIG. 4, a connecting portion 61 connected to one end side of the one end side beam 23 is attached by welding or the like to the upper end of the left sasara girder 11 located on the left side of the lower staircase portion 1A in the ascending direction. . 3, the connecting portion 61 and one end side of the one end side beam 23 are connected by bolts and nuts (not shown), thereby connecting the left sasara girder 11 and the one end side beam 23. be.
Similarly, on the upper end of the right Sasara girder 11 located on the right side in the ascending direction of the lower staircase portion 1A, a connecting portion 62 that is connected to the central side in the extending direction of one girder 21 is attached by welding or the like. Then, the connecting portion 62 and the central side of the one girder 21 in the extending direction are connected by bolts and nuts (not shown), thereby connecting the right sasara girder 11 and the one girder 21 .
Similarly, a connecting portion 63 connected to one end side of the other end side beam 24 is attached by welding or the like to the lower end of the left sasara girder 11 located on the left side of the upper stair portion 1B in the ascending direction. The left sasara girder 11 and the other end beam 24 are connected by connecting the connecting portion 63 and one end of the other end beam 24 with bolts and nuts (not shown).
Similarly, at the lower end of the right sasara girder 11 located on the right side of the upper staircase portion 1B in the ascending direction, a connecting portion 64 that is connected to the central side in the extending direction of one girder 21 is attached by welding or the like. Then, the connecting portion 64 and the central side of the one girder 21 in the extending direction are connected by bolts and nuts (not shown), thereby connecting the right sasara girder 11 and the one girder 21 .

また、図２に示すように、例えば、手摺１３の支柱１３ａとササラ桁１１とが連結部材１３ｂを用いてボルトＢ及びナットＮにより連結され、手摺４０の他方の桁２２の両端側に位置される支柱４１と他方の桁２２とが連結部材４２を用いてボルトＢ及びナットＮにより連結される。また、図２に示すように、例えば、手摺４０の支柱４１のうち、躯体８０側に位置する支柱４１が連結部材４４及びアンカーボルト４５等によって躯体８０に固定されている。尚、図２において、１３ｃは手摺１３の下弦材、４３は手摺４０の下弦材である。 Further, as shown in FIG. 2, for example, the post 13a of the handrail 13 and the sasara girder 11 are connected by bolts B and nuts N using connecting members 13b, and are positioned on both end sides of the other girder 22 of the handrail 40. The column 41 and the girder 22 on the other side are connected by bolts B and nuts N using connecting members 42 . Further, as shown in FIG. 2, for example, among the supports 41 of the handrail 40, the support 41 located on the building 80 side is fixed to the building 80 by connecting members 44, anchor bolts 45, and the like. In FIG. 2, 13c is the lower chord member of the handrail 13, and 43 is the lower chord member of the handrail 40. As shown in FIG.

尚、上述したボルト及びナットにより連結される各部材には、それぞれ、ボルトを貫通させる図外のボルト貫通孔が形成されており、連結される各部材に形成された各ボルト貫通孔にボルトを貫通させた後にボルトの先端側からナットを締結することにより、各部材が連結される。 Each member connected by the bolt and nut described above is formed with a bolt through-hole (not shown) through which the bolt penetrates. Each member is connected by fastening a nut from the tip side of the bolt after penetrating it.

以上説明したように、実施形態１に係る踊り場付き階段によれば、踊り場２の支持枠２０の一方の桁２１に、下側階段部分１Ａの左右一対のササラ桁１１，１１と、上側階段部分１Ｂの左右一対のササラ桁１１，１１と、支柱３とが、ボルトＢ及びナットＮによる機械的接合によって連結されて、これらが一体となった鉄骨骨組構造が構成される。
したがって、踊り場２の支持枠２０と階段部分１のササラ桁１１と支柱３とが一体となった鉄骨骨組構造を、ボルトＢ及びナットＮによる機械的接合によって簡単に構築できるようになる。
また、図１（ｂ），（ｄ）に示すように、踊り場２の支持枠２０の桁２１，２２のうち、建物の躯体８０からより遠く離れた位置にある他方の桁２２の下方に支柱を設けないようにするとともに、図２に示すように、建物の躯体８０に近い位置にあって躯体８０に隣接する一方の桁２１の延長方向の中央側の下方に、躯体８０に沿って延長する支柱３を設けたので、支柱３が躯体８０に沿って設けられていることにより、支柱３が踊り場２の下の領域Ｘにおいて邪魔にならないように位置させることができ、踊り場２の下の領域Ｘを有効に活用できるようになる。
さらに、踊り場２の支持枠２０は、一方の桁２１の延長方向の中央側及び他方の桁２２の延長方向の中央側に連結された中央側補強部２５を備えるので、支持枠２０の強度が増し、踊り場２の床部３０の揺れを低減できるようになる。即ち、踊り場２の強度を上げることができ、揺れ防止効果の高い踊り場２を構築できるようになる。また、支持枠２０の強度を上げることができることから、支持枠２０の一方の桁２１の延長方向の中央部の下方に設けた１本の支柱３のみで支持枠２０を支えることが可能となる。
また、踊り場２の支持枠２０を、一方の桁２１と他方の桁２２と一端側梁２３と他端側梁２４とで構成された長方形枠と、当該長方形枠内に構築された中央側補強部２５と床材支持構造部２６とブレース補強構造部２７とを備えた構成としたので、支持枠２０の強度をより大きくでき、支持枠２０の一方の桁２１の延長方向の中央部の下方に設けた１本の支柱３のみで支持枠２０を支えることが可能となる。 As described above, according to the staircase with landing according to the first embodiment, one girder 21 of the support frame 20 of the landing 2 is provided with the pair of left and right sasara girders 11, 11 of the lower stair portion 1A and the upper stair portion. A pair of left and right sasara girders 11, 11 of 1B and the strut 3 are mechanically connected by bolts B and nuts N to form a steel frame structure in which they are integrated.
Therefore, a steel frame structure in which the support frame 20 of the landing 2, the sasara girder 11 of the stair portion 1, and the struts 3 are integrated can be easily constructed by mechanically joining with the bolts B and nuts N.
Further, as shown in FIGS. 1(b) and 1(d), among the girders 21 and 22 of the support frame 20 of the landing 2, the pillars are placed below the other girder 22 located farther away from the building frame 80. and, as shown in FIG. Since the pillars 3 are provided along the frame 80, the pillars 3 can be positioned so as not to interfere with the area X under the landing 2. It becomes possible to effectively utilize the area X.
Furthermore, since the support frame 20 of the landing 2 is provided with the center side reinforcing portion 25 connected to the center side of the extension direction of one girder 21 and the center side of the extension direction of the other girder 22, the strength of the support frame 20 is increased. As a result, the shaking of the floor 30 of the landing 2 can be reduced. That is, the strength of the landing 2 can be increased, and the landing 2 having a high anti-swaying effect can be constructed. In addition, since the strength of the support frame 20 can be increased, it is possible to support the support frame 20 only with one post 3 provided below the central portion in the extending direction of one of the girders 21 of the support frame 20. .
In addition, the support frame 20 of the landing 2 is a rectangular frame composed of one girder 21, the other girder 22, one end side beam 23, and the other end side beam 24, and a central side reinforcement constructed in the rectangular frame. 25, the floor support structure 26, and the brace reinforcement structure 27, the strength of the support frame 20 can be increased, and the lower part of the support frame 20 in the extension direction of one of the girders 21 It is possible to support the support frame 20 with only one pillar 3 provided at the .

尚、図１に示す踊り場付き階段は、階段部分１が、下階としての例えば地上Ｅから踊り場２に繋がる下側階段部分１Ａと、踊り場２から上階としての例えば２階廊下Ｆに繋がる上側階段部分１Ｂとを備え、下側階段部分１Ａの左右のササラ桁１１，１１、及び、上側階段部分１Ｂの右側（階段上り方向の右側）のササラ桁１１が建物の躯体８０に沿って設けられ、踊り場２が建物の躯体８０より突出するように設けられた構造である。
即ち、踊り場２が建物の躯体８０より突出して、踊り場２の下の領域Ｘが地面となっている。このため、踊り場２の突出端側に位置される他方の桁２２の下に柱を設けた場合、当該柱が邪魔になって、踊り場２の下の領域Ｘである敷地を有効に活用できなくなる。そこで、建物の躯体８０側に位置される一方の桁２１の中央部の下方にのみ１本だけ支柱３を設け、建物の躯体８０から離れた場所に位置される他方の桁２２の下に柱を設けないようにしたので、踊り場２の下の領域Ｘである敷地を有効に活用できるようになる。 In the staircase with a landing shown in FIG. 1, the staircase portion 1 includes a lower staircase portion 1A that connects from the ground E to the landing 2 as a lower floor, and an upper portion that connects the landing 2 to a second floor corridor F as an upper floor. Left and right Sasara girders 11, 11 of the lower stair portion 1A and Sasara girders 11 on the right side of the upper stair portion 1B (right side in the ascending direction of the stairs) are provided along the frame 80 of the building. , the landing 2 is provided so as to protrude from the skeleton 80 of the building.
That is, the landing 2 protrudes from the frame 80 of the building, and the area X under the landing 2 is the ground. Therefore, when a pillar is provided under the other girder 22 positioned on the protruding end side of the landing 2, the pillar becomes an obstacle and the site, which is the area X under the landing 2, cannot be effectively utilized. . Therefore, only one post 3 is provided below the central part of one of the girders 21 positioned on the building skeleton 80 side, and the other girder 22 positioned away from the building skeleton 80 is positioned below the pillar. is not provided, the site which is the area X under the landing 2 can be effectively utilized.

図１に示すように、下側階段部分１Ａの左右のササラ桁１１，１１、及び、上側階段部分１Ｂの右側のササラ桁１１が建物の躯体８０に沿って設けられている構造の場合、下側階段部分１Ａの左右のササラ桁１１，１１、及び、上側階段部分１Ｂの右側のササラ桁１１には、手摺１３が取付けられておらず、上側階段部分１Ｂの左側のササラ桁１１にのみ手摺１３が取付けられている（図１（ａ）参照）。
尚、階段部分１が、建物の外側に設置される場合等においては、全てのササラ桁１１に手摺１３が取付けられる場合もある。 As shown in FIG. 1, in the case of a structure in which the left and right Sasara girders 11, 11 of the lower staircase portion 1A and the right Sasara girders 11 of the upper staircase portion 1B are provided along the building skeleton 80, the lower No handrail 13 is attached to the left and right Sasara girders 11, 11 of the side stair portion 1A and the right Sasara girders 11 of the upper stair portion 1B, and only the left Sasara girders 11 of the upper stair portion 1B have handrails. 13 is attached (see FIG. 1(a)).
In addition, when the staircase portion 1 is installed outside the building, handrails 13 may be attached to all the sasara girders 11 .

尚、図１において、符号１３Ｆは、２階廊下Ｆの手摺を示し、当該手摺１３Ｆは、例えば壁体により形成されている。
また、手摺１３、手摺４０の外側を壁で覆うような構成としてもよい。 In FIG. 1, reference numeral 13F indicates a handrail of the second-floor corridor F, and the handrail 13F is formed of, for example, a wall.
Moreover, it is good also as a structure which covers the outer side of the handrail 13 and the handrail 40 with a wall.

また、実施形態１においては、下側階段部分１Ａの左右のササラ桁１１，１１、及び、上側階段部分１Ｂの右側（階段上り方向の右側）のササラ桁１１が建物の躯体８０に沿って設けられている構造であり、支柱３に沿った位置に躯体８０が存在するので、一体となるように連結されたササラ桁１１と支持枠２０と支柱３との鉄骨骨組構造体が、連結部材７０を介して躯体８０に固定された構成としたが、一体となるように連結されたササラ桁１１と支持枠２０と支柱３との鉄骨骨組構造体が、躯体８０に固定されていない構成としてもよい。 In the first embodiment, the left and right Sasara girders 11, 11 of the lower stairway portion 1A and the Sasara girders 11 on the right side of the upper stairway portion 1B (the right side in the stair climbing direction) are provided along the building skeleton 80. Since the frame 80 exists at a position along the column 3, the steel frame structure of the sasara girder 11, the support frame 20, and the column 3 that are integrally connected is the connecting member 70. Although it is configured to be fixed to the frame 80 via, the steel frame structure of the sasara girder 11, the support frame 20, and the column 3 that are integrally connected is not fixed to the frame 80. good.

また、建物の躯体８０側に位置される一方の桁２１の延長方向の一端側の下方に図外の支柱を設けて、当該支柱の上端と一方の桁２１の延長方向の一端側とを連結するとともに、当該支柱の下端を地面に固定した構成としてもよい。
即ち、踊り場２の一方の桁２１に複数本の支柱を連結し、複数本の支柱で支持枠２０を支持する構成としてもよい。 In addition, a post (not shown) is provided below one end of one girder 21 in the extension direction, which is positioned on the side of the frame 80 of the building, and the upper end of the support and one end of the girder 21 in the extension direction are connected. In addition, the lower end of the support may be fixed to the ground.
That is, a configuration may be adopted in which a plurality of struts are connected to one girder 21 of the landing 2 and the support frame 20 is supported by the plurality of struts.

実施形態２
ササラ桁１１に手摺の取付部材等の部品を取付けるための部品取付用ボルトのねじ孔を形成する場合、通常、ササラ桁に下穴を形成した後にタップ加工してねじ孔を形成する。しかしながら、板厚が厚いササラ桁に対するタップ加工作業は大変である。
そこで、実施形態２では、図５に示すように、ササラ桁に対するタップ加工作業を不要とするために、ササラ桁本体１１ａに溶接などで取付けられたねじ止め部７５を備えたササラ桁１１Ａとした。
ねじ止め部７５は、金属平板により構成されたササラ桁本体１１ａの板面１１ｆに溶接により取付けられた取付部７６と、ササラ桁本体１１ａの板面と所定間隔を隔てて平行に対向する板面を有してササラ桁本体１１ａの板厚よりも薄厚の薄板平板部７７と、この薄板平板部７７に形成されたブラインドナット取付用貫通孔７８と、ブラインドナット取付用貫通孔７８に取付けられたブラインドナット７９とを備える。
ササラ桁本体１１ａは、ブラインドナット取付用貫通孔７８と対向する位置に、ブラインドナット７９の先端側、及び、当該ブラインドナット７９に締結されたねじＢ１の先端側を挿入するための貫通孔１１ｂを備える。
従って、ブラインドナット取付用貫通孔７８に形成されたブラインドナット７９のねじ孔と部品Ｓに形成された貫通孔とを一致させた状態で、ねじＢ１が部品Ｓの貫通孔を貫通してブラインドナット７９のねじ孔に螺着されることにより、部品Ｓが薄板平板部７７にねじ止めされ、部品Ｓがササラ桁１１Ａに取付けられることになる。
実施形態２によれば、ササラ桁１１Ａの薄板化が図れるとともに、このササラ桁１１Ａへのねじ止め部を簡単に製作できる。 Embodiment 2
When forming screw holes for part mounting bolts for mounting parts such as handrail mounting members in the Sasara girder 11, usually, pilot holes are formed in the Sasara girder 11 and then tapped to form screw holes. However, the tapping work for the thick Sasara girder is difficult.
Therefore, in the second embodiment, as shown in FIG. 5, the Sasara girder 11A is provided with a screwing portion 75 attached to the Sasara girder main body 11a by welding or the like in order to eliminate the need for tapping work on the Sasara girder. .
The screwing portion 75 has a mounting portion 76 attached by welding to the plate surface 11f of the sasara girder main body 11a made of a flat metal plate, and a plate surface facing parallel to the plate surface of the sasara girder main body 11a with a predetermined gap. A thin plate plate portion 77 thinner than the plate thickness of the Sasara girder main body 11a, a blind nut mounting through hole 78 formed in the thin plate plate portion 77, and a blind nut mounting through hole 78. A blind nut 79 is provided.
The Sasara girder main body 11a has a through hole 11b at a position facing the blind nut mounting through hole 78 for inserting the tip side of the blind nut 79 and the tip side of the screw B1 fastened to the blind nut 79. Prepare.
Therefore, in a state in which the screw hole of the blind nut 79 formed in the blind nut mounting through hole 78 and the through hole formed in the component S are aligned, the screw B1 passes through the through hole of the component S to connect the blind nut. The part S is screwed to the thin flat plate portion 77 by being screwed into the screw hole of 79, and the part S is attached to the sasara girder 11A.
According to the second embodiment, it is possible to reduce the thickness of the sasara girder 11A, and to easily manufacture the screwing portion to the sasara girder 11A.

実施形態３
従来、階段と建物の躯体８０とを接続する接続部分においては、例えば、左のササラ桁の上端部と右のササラ桁の上端部との間に跨るように左右のササラ桁の上端部に取付けられた平板状の接続部材を、鉄骨等の躯体８０にコーチねじ８１等の固定具を用いて取付けるようにしていた。この場合、接続部材の上端と躯体との間に僅かな隙間が生じ、この僅かな隙間にはシーリング剤を定着させることができなかった。従って、この僅かな隙間から雨水等が侵入してしまう問題が生じていた。
そこで、実施形態３では、図６（ａ）に示すように、接続部材８２の上端側と躯体８０との間にシーリング剤８３を定着させるための凹部８４を形成するために、上端側が左右方向に連続する段差部８５に形成された構成の接続部材８２を用いるようにした。
即ち、接続部材８２は、躯体８０に取付けられる左右上下方向に長い平板基部８２ａと、平板基部８２ａの上端より平板基部８２ａの板面と交差する方向に延長する横板部８２ｂと、横板部８２ｂの延長端より平板基部８２ａから離れる方向に延長する縦板部８２ｃとを備える。
そして、縦板部８２ｃと横板部８２ｂと躯体８０とで囲まれたシーリング剤充填用の凹部８４が形成されるように、コーチねじ８１等の固定具を用いて平板基部８２ａを躯体８０に取付けることによって、躯体８０に取付けられた接続部材８２の上端側に、シーリング剤充填用の凹部８４が形成される。
そして、シーリング剤充填用の凹部８４内にシーリング剤８３を充填することで、シーリング剤充填用の凹部８４内にシーリング剤８３が定着し、接続部材８２の上端と躯体８０との間から水等が侵入してしまうことを防止できるようになる。 Embodiment 3
Conventionally, in the connection part connecting the stairs and the building frame 80, for example, it is attached to the upper end of the left and right sasara girder so as to straddle between the upper end of the left sasara girder and the upper end of the right sasara girder. The plate-like connecting member thus obtained is attached to a frame 80 such as a steel frame using a fixture such as a coach screw 81 or the like. In this case, a slight gap was generated between the upper end of the connecting member and the frame, and the sealant could not be fixed in this slight gap. Therefore, there has been a problem that rainwater or the like enters through this slight gap.
Therefore, in the third embodiment, as shown in FIG. 6A, in order to form a concave portion 84 for fixing the sealing agent 83 between the upper end side of the connection member 82 and the frame 80, the upper end side The connecting member 82 is formed in a stepped portion 85 continuous to the .
That is, the connection member 82 includes a flat plate base portion 82a that is attached to the frame 80 and elongated in the left, right, up and down directions, a horizontal plate portion 82b that extends from the upper end of the flat plate base portion 82a in a direction intersecting the plate surface of the flat plate base portion 82a, and a horizontal plate portion A vertical plate portion 82c extends from the extended end of 82b in a direction away from the flat base portion 82a.
Then, the flat plate base portion 82a is attached to the frame 80 using a fixture such as a coach screw 81 so that a recess 84 for sealing agent filling surrounded by the vertical plate portion 82c, the horizontal plate portion 82b, and the frame 80 is formed. By attaching, a recess 84 for sealing agent filling is formed on the upper end side of the connecting member 82 attached to the frame 80 .
By filling the recess 84 for sealing agent filling with the sealing agent 83 , the sealing agent 83 is fixed in the recess 84 for sealing agent filling, and water or the like is released from between the upper end of the connecting member 82 and the frame 80 . can be prevented from invading.

実施形態４
図６（ｂ）乃至図６（ｄ）に示すように、階段より延長して建物の外側に設けられる廊下の準耐火構造において、根太８８の上に設置された廊下の床部材８９の裏側である軒天又は上裏等と呼ばれる部分に、鉄板等の耐火パネルを敷設する構造の場合に、当該耐火パネルとして、リブ付きの耐火パネル、例えば、リブ９１が形成されたリブ付き鉄板９０を用いた。
このようなリブ付き鉄板９０を用いることによって、板厚が薄く軽量でかつ高強度の耐火パネルを実現でき、かつ、耐火パネルの軽量化が図れることによって、階段と連続する準耐火構造の廊下を構築する際に、耐火パネルを敷設する作業の容易化が図れる。 Embodiment 4
As shown in FIGS. 6(b) to 6(d), in the quasi-fireproof structure of the corridor extending from the stairs and provided outside the building, on the back side of the floor member 89 of the corridor installed on the joist 88 In the case of a structure in which a fire-resistant panel such as an iron plate is laid in a part called eaves or upper back, etc., a ribbed fire-resistant panel, for example, a ribbed iron plate 90 with ribs 91 is used as the fire-resistant panel. board.
By using such a ribbed iron plate 90, it is possible to realize a thin, lightweight, and high-strength fire-resistant panel, and by reducing the weight of the fire-resistant panel, a corridor with a quasi-fire-resistant structure that is continuous with the stairs can be realized. When constructing, it is possible to facilitate the work of laying fireproof panels.

尚、実施形態では、鉄骨骨組構造の踊り場付き階段を例示したが、本発明の構造は、鉄骨骨組構造以外の、例えば木骨組構造の踊り場付き階段にも適用可能である。 In the embodiment, the stairs with a landing of a steel frame structure were exemplified, but the structure of the present invention is also applicable to stairs with a landing of a wooden frame structure, for example, other than the steel frame structure.

また、実施形態では、踊り場２の支持枠２０の一方の桁２１に、ササラ桁１１，１１と支柱３とが、ボルトＢ及びナットＮによる機械的接合によって連結された構成を例示したが、本発明は、踊り場２の支持枠２０の一方の桁２１に、ササラ桁１１，１１と支柱３とが溶接により連結された構成としてもよい。 In addition, in the embodiment, the configuration in which the Sasara girders 11, 11 and the strut 3 are connected to one of the girders 21 of the support frame 20 of the landing 2 by mechanical joints using the bolts B and nuts N has been exemplified. The invention may be configured such that the sasara girders 11, 11 and the strut 3 are connected to one of the girders 21 of the support frame 20 of the landing 2 by welding.

１階段部分、１Ａ下側階段部分、１Ｂ上側階段部分、２踊り場、３支柱、
１１，１１Ａササラ桁（階段部分の桁）、１１ａササラ桁本体（平板）、
２０支持枠、２１一方の桁、２２他方の桁、２３一端側梁、２４他端側梁、
２５中央側補強部、７０連結部材、７５ねじ止め部、７６取付部、
７７薄板平板部、７８ブラインドナット取付用貫通孔、７９ブラインドナット、
Ｓ部品。 1 stair section, 1A lower stair section, 1B upper stair section, 2 landing, 3 pillar,
11, 11A Sasara girder (girders of stairs), 11a Sasara girder body (flat plate),
20 support frame, 21 one girder, 22 other girder, 23 one end beam, 24 other end beam,
25 central reinforcing portion, 70 connecting member, 75 screwing portion, 76 mounting portion,
77 thin plate plate portion, 78 blind nut mounting through hole, 79 blind nut,
S part.

Claims

In a staircase with a landing configured so that the staircase part folds back through the landing,
A girder of a lower stair portion provided on one girder of the landing so as to extend downward from the landing, a girder of the upper stair portion provided to extend upward from the landing, and one girder of the landing. The struts provided below the girders are connected ,
Only one pillar is provided, and the upper end of the pillar is connected to the central part in the extending direction of one of the girders of the landing,
A staircase with a landing, characterized in that the upper end of the support and the central part in the extending direction of one of the girders of the landing are connected via a connecting member, and the connecting member is connected to the skeleton of the building .

The landing comprises a floor material and a support frame that supports the floor material,
The support frame includes the one girder, the other girder provided to face the one girder with a gap therebetween, one end side of the one girder, and one end side of the other girder. a connecting one end side beam, a second end side beam connecting the other end side of the one girder and the other end side of the other girder, and a central side of the one girder and a central side of the other girder. 2. The staircase with a landing according to claim 1, further comprising a central reinforcing portion.

The girder of the staircase portion comprises a flat plate and a screwing portion for attaching members to the flat plate,
The screwing portion has a mounting portion attached to the plate surface of the flat plate, and a thin flat plate portion having a plate surface facing the plate surface of the flat plate with a predetermined gap and having a thickness thinner than the plate thickness of the flat plate. and a blind nut mounting through hole formed in the thin flat plate portion, and a blind nut mounted in the blind nut mounting through hole,
2. The member is attached to the thin flat plate portion by a screw passing through a screw through hole formed in the member and being screwed into the blind nut. 2. Stairs with landings according to 2.