JP4099533B2

JP4099533B2 - Step unit for spiral staircase, spiral staircase

Info

Publication number: JP4099533B2
Application number: JP2003102516A
Authority: JP
Inventors: 精文横森
Original assignee: 株式会社横森製作所
Priority date: 2003-04-07
Filing date: 2003-04-07
Publication date: 2008-06-11
Anticipated expiration: 2023-04-07
Also published as: JP2004308226A

Description

【０００１】
【発明の属する技術分野】
この発明は、廻り階段で、長い支柱を不要とし、施工後のメンテナンスを容易とすることを目的とした螺旋階段用の踏段ユニット及び螺旋階段に関する。
【０００２】
【従来の技術】
段板を取り付けた帯環を上下に重ね、上下縁の全体に亘って円周方向に連続して形成した噛合歯を噛合する構造が提案されている（特許文献１）。
【０００３】
また、ステップ板を突設した円筒状部材の上下両開口縁に連結し合う連結部を設け、ステップ板の向きをずらすように、連結した構造が提案されている（特許文献２）。
【０００４】
また、踏段と心柱ユニットとを順次挟持して、螺旋階段を形成する構造で、連結孔内に、上下に係合部を有する締め付け部材を、順次挿入して、上下の係合部を係合させながら組み立てる螺旋階段が提案されている（特許文献３）。
【０００５】
【特許文献１】
実公昭５８−３４９１１
【０００６】
【特許文献２】
実開平５６−７８２８
【０００７】
【特許文献３】
実公平３−５４５１９
【０００８】
【発明が解決しようとする課題】
前記従来の技術の内、特許文献１、２では、心材を使用しなければ、自立できない問題点があった。また、特許文献３では、下段の締付け部材の上方に常に上段の締付け部材を位置させて、各締付け部材の上下を係合しなければならなかったので、常に１段づつしか組立又は分解ができない問題点があった。
【０００９】
【課題を解決するための手段】
然るにこの発明では、支柱片の基体の上下開口部に、中央開口と連結孔を有する連結板を嵌挿固定したので、前記問題点を解決した。
【００１０】
即ち、階段ユニットの発明は、螺旋階段用の１段又は複数段分の踏板有する支柱片からなる踏段ユニットであって、支柱片を上下に重ねて、支柱を形成しつつ形成する螺旋階段用の踏段ユニットであって、前記支柱片は、上下に開口した円筒状の基体の上下開口部に、中央開口を有する上連結板及び下連結板を夫々嵌挿固定し、前記上下連結板に、前記踏板をずらす角度に応じて、所定間隔で環状に並列したボルトを挿通する連結孔を形成し、前記下連結板の下面は、支柱片の下縁より下方に位置し、前記上連結板の上面は、支柱片の上縁より下方に位置し、前記中央開口は、作業者が手を入れて前記連結孔に挿通する前記ボルトの締め付け作業ができる口径とすることを特徴とする螺旋階段用の踏段ユニットである。
【００１１】
また、前記において、踏板は下面中央に放射状の補強板を固定すると共に、上段側の縁と下段側の縁に夫々リブを形成した螺旋階段用の踏段ユニットである。また、前記において、下側に他の踏段ユニットを重ねた際に、下連結板の下方突出部分は、前記下側の踏段ユニットの支柱片の基体の上開口部に、回転自在に嵌挿できる螺旋階段用の踏段ユニットである。
【００１２】
また、螺旋階段の発明は、
(1) 筒状基体の上下開口部に、上下に連結孔を有するドーナツ状の連結板を嵌挿固定して支柱片とし、該支柱片の外側面に扇形状の踏板を突設し、前記連結板に、作業者が手を入れることができる口径の中央開口を形成した踏段ユニットを構成する。
(2) 前記踏段ユニットの所定数を、各支柱片を積み上げて、連結する支柱片から支柱を構成する。
(3) 前記各支柱片は、踏板をずらしながら、前記中央開口から作業者が手を入れて、隣接する上下の連結板の前記連結孔にボルトを挿通して連結固定する。
(4) 以上のようにして、支柱の廻りに螺旋状に踏板を取り付けたことを特徴とする螺旋階段である。
【００１３】
また、前記において、基準踏板の前側端部と直上段の踏板の後側端部とを連結縦材で連結すると共に、該縦支柱間にパネルを固定した螺旋階段である。更に、前記において、支柱片を上下に積み上げる際に、対向する上連結板と下連結板との間にスペーサーを介装した螺旋階段である。
【００１４】
【発明の実施の形態】
この発明の踏段ユニット２５は、筒状の基体１の上下開口に、上連結板７、下連結板９を固定して、支柱片２７を構成し、支柱片２７の基体１の外側面４に踏板１５を固定して、構成する（図３）。上下連結板７、８は中央開口１１を有し、周縁部１２に等間隔環状に配置した連結孔１３、１３を有する（図６）。隣接する連結孔１３、１３は角度αで形成され、角度αは踏板１５の取付角度αと一致させてある（図２（ｂ）、図３）。また、上連結板７の上面８は、基体１の上縁２より下方に位置し、下連結板９の下面１０は基体１の下縁３より下方に突出して形成されている（図６（ａ）（ｂ））。
【００１５】
踏段ユニット２５は、スペーサー３２を介装して、支柱片２７を上下に重ねながら、支柱片２７、２７から支柱４２を形成しながら螺旋階段５０を構成する（図５（ｃ）、図１、図２）。この際、上下の支柱片２７、２７で、隣接する上下連結板７、９の連結孔１３、１３にボルト３５を挿通してナット３６を螺合締結して固定する（図５（ｂ）（ｃ））。
【００１６】
【実施例１】
図面に基づきこの発明の実施例を説明する。
【００１７】
［１］踏段ユニット２５の構成
【００１８】
外径Ｄ_１、高さＬ_１（蹴上げ高さに応じて形成される）で上下に開放した円筒型の基体１の上開口部、下開口部に、中央開口１１を形成したドーナツ状の上連結板７、下連結板９を、夫々嵌挿固着する。下連結板７の下面１０は、基体１の下縁３より距離Ｌ_２だけ下方に突出し、上連結板７の上面８は、基体１の上縁２より距離Ｌ_３だけ下方に位置している（図６（ａ）（ｂ））。即ち、基体１、１を上下に重ねた場合、下連結板９の下側は、下方に位置する基体１の上開口部に、回転自在に嵌挿される（Ｌ_２≦Ｌ_３）。
【００１９】
上下連結板７、９は同一形状で形成され、中央開口１１は径Ｄ_２で形成されている。上下連結板７、９で、中央開口１１を除いた部分を周縁部１２とし、周縁部１２には、連結孔１３、１３が等間隔で環状に配置されている。連結孔１３は、中心からの角度αで形成され、角度αは、必要な踏板の幅に応じて形成される（図６、図３（ａ））。ここでは、連結孔１３は１６個形成され、
角度α＝２２．５°
に設定してある。
【００２０】
基体１の外側面４に、略水平で放射状に、部分扇型状の踏板１５を突設する。踏板１５の下面１７中央に、下方に向け、基端側（基体側）から先端側の全長に亘る補強板２０を固定する。踏板１５の基端２１は高く（厚く）形成され、先端２２側に向けて低く（薄く）形成され、基端２１は基体１の外側面４に固定される。
【００２１】
また、補強板２０は、隣接する２つの連結孔１３、１３の中央に位置している。即ち、隣接する両連結孔１３、１３から角度β（β＝１１．２５°）となるように配置される（図３（ａ））。また、踏板１５の上側の縁は上方に向けたリブ１８が形成され、下側の縁は下方に向けたリブ１９が形成される。
【００２２】
以上のようにして、１段分の踏段ユニット２５を形成する（図３（ａ）（ｂ））。ここで、基体１に上下連結板７、９を嵌挿固定した構造が、支柱片２７を構成する。
【００２３】
［２］螺旋階段５０の構成
【００２４】
（１）１段目（一番下）の踏段ユニット２５ａの基体１は、高さＬ_４（Ｌ_４＞Ｌ_１）で形成し、下面に接合用のフランジ３１を固定してあり、ベース２９に埋設されたアンカーボルト３０、３０に、フランジ３１を固定し、踏段ユニット２５ａを固定する（図１）。
【００２５】
（２）続いて、２段目の踏段ユニット２５、３段目の踏段ユニット２５を、踏板１５を所定角度づらしながら、支柱片２７、２７を積み上げ、上下連結板７、９をボルト３５・ナット３６で連結しながら、順に組み立てる。
【００２６】
（３）即ち、新規に取付ける上段側の踏段ユニット２５Ｂの支柱片２７を、ワッシャー状のスペーサー３２を介装して、下段側の踏段ユニット２５Ａの支柱片２７の上に重ねる（図５（ａ））。スペーサー３２はボルト３５を使用する位置に対応させて配置する。また、この際、上段側の踏段ユニット２５Ｂの踏板１５を、所定角度（即ち、角度α＝２２．５°）だけ、ずらす。この場合、踏板１５をずらす角度αと連結孔１３の形成角度αが同一に形成されているので、上段側の踏段ユニット２５Ｂを容易に所定位置に設定できる（図２（ｂ）、図３、図６（ａ）（ｂ））。
【００２７】
また、この際、支柱片２７、２７を上下に重ねた際に、上段側の踏段ユニット２５Ｂの下連結板９の下側が、下段側の踏段ユニット２５Ａの基体１の上開口部に回転自在に嵌挿されるので、上段側の踏段ユニット２５Ｂを回転させながら連結孔１３の位置合わせが容易にできる。
【００２８】
また、この際、上段側の踏段ユニット２５Ｂの支柱片２７の基体１の下縁３と、下段側の踏段ユニット２５Ａの基体１の下縁３に距離Ｈ（Ｈ＝５ｍｍ程度）の隙間が形成される（図３（ｂ）、図５（ｃ））。また、スペーサー３２は、ドーナツ状で、上下連結板７、９の連結孔１３、１３と連通する透孔３３が形成されている。
【００２９】
また、上下連結板７、９と上下縁２、３との長さＬ_２、Ｌ_３はここでは、
Ｌ_３＝Ｌ_２、
としてあり、スペーサー３２の厚さに対応した距離Ｈの目地が形成される。従って、スペーサー３２の厚さを調節すること、支柱片２７、２７間に、任意な長さ（距離Ｈ）の均一な目地が形成でき、美観上も優れた外観を構成できる。
【００３０】
（４）次に、上段側の踏段ユニット２５Ｂの上下上連結板７、９の中央開口１１、１１から手を入れ、ボルト３５を、下段側の上連結板７の連結孔１３、スペーサー３２の透孔３３、上段側の下連結板９の連結孔１３に挿通して、ナット３６を締結固定する（図５（ｂ）（ｃ））。ボルト３６は、連結孔１３、１３の１つおきに、合計８本使用する。
【００３１】
（５）以下、同様に、踏段ユニット２５を、踏板１５をずらしながら重ねて、ボルト３５・ナット３６で上下連結板７、９を固定し、支柱片２７、２７を積層していく。
【００３２】
（６）続いて、上段側の踏段ユニット２５Ｂの踏板１５の下側のリブ１９の下方に、下段側の踏段ユニット２５Ａの踏板１５の上側のリブ１８が位置し、上下でリブ１８、１９が重なり、重なり部分に共通の連結柱材３８を立設し、上下の踏板１５、１５を連結柱材３８で連結する。即ち、連結柱材３８は角筒で、連結柱材３８の下端部を、上段側の踏段ユニット２５Ｂの踏板１５の下側と、下段側の踏段ユニット２５Ａの踏板１５の上側とにビス４７、４７で固定する（図４）。
【００３３】
隣接する連結柱材３８、３８の上端に、上下に共通する外周側の手摺４０を取付ける。また、隣接する連結柱材３８、３８間に、パンチングメタルの覆い板３９を嵌挿して、覆い板３８の両側３８ａ、３８ａを連結柱材３８、３８に固定する。
【００３４】
（７）最上段の支柱片２７ｂの上面に、キャップ４８を固定して、螺旋階段５０を構成する（図１、図２）。ここで、積層した支柱片２７、２７から支柱４２を形成し、支柱４２には、金具４４、４４が固定され、金具４４、４４に内周側の手摺４５が取り付けられている。また、図中４６は、踊り場である（図１、図２（ａ））。
【００３５】
また、前記において、予め複数段（例えば２段）の踏段ユニット２５を連結しておき、その連結された複数段の踏段ユニット２５、２５を、上記と同様に連結することもできる。尚、この場合、中央開口１１から手を入れて、ボルト締めできる高さ（２つであれば、２×Ｌ_１）まで、連結できる。
【００３６】
（８）螺旋階段をリフォームする際には、キャップ４８を取り外し、組立とは逆の手順で、支柱片２７のボルト３５・ナット３６を順次緩めて外すことにより、容易に分解できる。この場合、複数段の支柱片３７、３７をまとめて取り外すこともできる。
【００３７】
［３］他の実施例
【００３８】
（１）前記実施例において、上下の踏段ユニット２５Ａ、２５Ｂは、１つおきに連結孔１３を使用して、８本のボルト３５・ナット３６で連結したが、所定の強度を確保できれば、少ない本数（例えば、４本）で連結することもできる（図示していない）。この場合には、上下連結板７、９の連結孔１３は使用するボルトに応じて数を少なく形成することもできる。踏板１５を角度αで、づらした場合に、ボルトを挿通する必要な連結孔１３、１３が常に連通するようにする。
【００３９】
（２）また、前記実施例において、上下連結板７、９は円形ドーナツ状としたが、円筒型の基体１に嵌挿固定でき、かつ、ボルト締め作業ができる中央開口１１を有し、かつ環状の配置した連結孔１３、１３を形成できれば、多角形（８角形、１６角形など）とすることもできる。
【００４０】
（３）また、前記実施例において、パンチングメタルからなる覆い板３９を取り付けたが、落下を防止できる手段で有れば、他の材料（例えば、格子状の柵等）を使用することもできる（図示していない）。
【００４１】
（４）また、前記実施例において、筒状の基体１に１つの踏板１５を固定したが、１つの基体１の外側面に、高さＬ_１、角度αずらして２つ又はそれ以上の踏板を固定して、踏段ユニットを構成することもできる（図示していない）。
【００４２】
（５）前記実施例において、スペーサー３２はワッシャー状（ドーナツ状）としたが、所定の厚さで形成すれば、形状は任意である。例えば、上下連結板７、９と略同一形状とすることもできる（図示していない）。即ち、連結孔１３、１３と同じ配置で透孔３３、３３が形成され、中央開口１１に対応した中央開口が形成された形状となる。
【００４３】
【発明の効果】
この支柱片は上下開口に連結板を固定したので、上下に重ねた支柱片を連結板の連結孔にボルトを挿通して連結板を固定しながら支柱を構成できる。従って、支柱片は他に心材等を使用せずに自立できるので、螺旋階段の組立及び分解を容易にできる効果がある。また、隣接する上下の連結板の固定は、独立に行われるので、複数段づつ組立又は分解をすることもできる効果がある。従って、リフォームに最適の螺旋階段となる。
【００４４】
また、踏板は、下面に補強板を固定し、上段側及び下段側にリブを形成したので、踏板の厚さを薄くして踏段ユニット全体の重量を軽くできる。
【００４５】
また、踏段ユニットは、１段又は複数段に相当する形状となるので、より少ない段数（例えば、１段）とすれば、それだけ軽量小形となり、人力で運搬取付作業が可能となり、重機類を不要にできる効果がある。また、支柱片を上下に重ねた際に、回動自在にできるので、運搬時に、必要な段数の積み段ユニットを支柱片を重ねて一側に踏板を寄せられるので、運搬時にかさばらない効果がある。
【図面の簡単な説明】
【図１】この発明の実施例の螺旋階段の正面図である。
【図２】（ａ）は、同じく一部を省略した平面図である。
（ｂ）は、図１のＡ−Ａ線における断面図である。
【図３】この発明の単位踏段ユニットで、（ａ）は平面図、（ｂ）は正面図である。
【図４】同じく側面図である。
【図５】（ａ）〜（ｃ）は支柱片による連結を説明する縦断面図である。
【図６】この発明の支柱片で、（ａ）は平面図、（ｂ）は縦断面図である。
【符号の説明】
１基体
２基体の上縁
３基体の下縁
４基体の外側面
５基体の内面
７上連結板
８上連結板の上面
９下連結板
１０下連結板の上面
１１上下連結板の中央開口
１２上下連結板の周縁部
１３上下連結板の連結孔
１５踏板
１６踏板の上面
１７踏板の下面
１８踏板のリブ（上段側）
１９踏板のリブ（下段側）
２０踏板の補強板
２５踏段ユニット
２７支持片
２９ベース
３０アンカーボルト
３２スペーサー
３３スペーサーの透孔
３５ボルト
３６ナット
３８連結縦材
３９覆い板
４０外周側の手摺
４２支柱
４５内周側の手摺
４６踊り場
５０螺旋階段[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a step unit for a spiral staircase and a spiral staircase for the purpose of facilitating maintenance after construction without using a long strut in a surrounding staircase.
[0002]
[Prior art]
A structure has been proposed in which belt bands with step plates are stacked one above the other and meshing mesh teeth formed continuously in the circumferential direction over the entire upper and lower edges (Patent Document 1).
[0003]
In addition, a connecting structure has been proposed in which connecting portions are provided to be connected to both upper and lower opening edges of a cylindrical member provided with a step plate so as to shift the direction of the step plate (Patent Document 2).
[0004]
In addition, the step and the core unit are sequentially sandwiched to form a spiral staircase, and a fastening member having an upper and lower engaging portion is sequentially inserted into the coupling hole to engage the upper and lower engaging portions. A spiral staircase that can be assembled while being combined has been proposed (Patent Document 3).
[0005]
[Patent Document 1]
Shoko 58-34911
[0006]
[Patent Document 2]
Japanese kaihei 56-7828
[0007]
[Patent Document 3]
Reality 3-54519
[0008]
[Problems to be solved by the invention]
Among the prior arts, Patent Documents 1 and 2 have a problem that they cannot be self-supported unless a core material is used. Further, in Patent Document 3, since the upper tightening member must always be positioned above the lower tightening member and the upper and lower portions of each tightening member must be engaged, it is always possible to assemble or disassemble only one step at a time. There was a point.
[0009]
[Means for Solving the Problems]
However, in the present invention, since the connecting plate having the central opening and the connecting hole is inserted and fixed in the upper and lower openings of the base of the columnar piece, the above-mentioned problems are solved.
[0010]
That is, the invention of the stair unit is a step unit composed of a column piece having one or a plurality of steps for a spiral staircase, and is used for a spiral staircase formed by stacking column pieces vertically and forming a column. In the step unit, the support piece is inserted into and fixed to the upper and lower openings of the cylindrical base body opened up and down, and the upper connecting plate and the lower connecting plate each having a central opening are inserted and fixed to the upper and lower connecting plates. According to the angle at which the tread plate is displaced, a connection hole is formed through which bolts arranged in a ring at a predetermined interval are inserted. The lower surface of the lower connection plate is located below the lower edge of the column piece, and the upper surface of the upper connection plate Is located below the upper edge of the pillar piece, and the central opening has a diameter capable of tightening the bolt inserted by the operator and inserted into the connecting hole . It is a step unit.
[0011]
In the above description, the step board is a step unit for a spiral staircase in which a radial reinforcing plate is fixed at the center of the lower surface and ribs are formed on the upper side edge and the lower side edge, respectively. Further, in the above, when another step unit is stacked on the lower side, the downward projecting portion of the lower connecting plate can be rotatably inserted into the upper opening of the base of the column piece of the lower step unit. This is a step unit for spiral stairs.
[0012]
The invention of the spiral staircase
(1) A doughnut-shaped connecting plate having connecting holes on the top and bottom is inserted and fixed in the upper and lower openings of the cylindrical base body to form a column piece, and a fan-shaped step plate is provided on the outer surface of the column piece , A step unit is formed in which a central opening having a diameter that allows an operator to put his / her hand is formed in the connecting plate .
(2) A predetermined number of the step units is formed by stacking each column piece and configuring the column from the column pieces to be connected.
(3) said each strut piece, while shifting the treadle, the putting worker from the central opening hand, connecting and fixing by inserting bolts into the coupling hole of the upper and lower connecting plate adjacent.
(4) The spiral staircase is characterized in that a tread is attached around the support in a spiral manner as described above.
[0013]
Further, in the above, the spiral staircase in which the front end portion of the reference tread plate and the rear end portion of the upper step tread plate are connected by a connecting vertical member, and the panel is fixed between the vertical support columns. Furthermore, in the above, the spiral staircase is a spiral staircase in which a spacer is interposed between the upper connecting plate and the lower connecting plate that face each other when the column pieces are stacked up and down.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
In the step unit 25 of the present invention, the upper connecting plate 7 and the lower connecting plate 9 are fixed to the upper and lower openings of the tubular base body 1 to form the support piece 27, and the support piece 27 is formed on the outer surface 4 of the support body 1. The tread board 15 is fixed and configured (FIG. 3). The upper and lower connecting plates 7 and 8 have a central opening 11, and have connecting holes 13 and 13 arranged in an annular manner on the peripheral edge portion 12 (FIG. 6). Adjacent connecting holes 13 and 13 are formed at an angle α, and the angle α is made to coincide with the mounting angle α of the tread plate 15 (FIGS. 2B and 3). Further, the upper surface 8 of the upper connecting plate 7 is positioned below the upper edge 2 of the base 1, and the lower surface 10 of the lower connecting plate 9 is formed to protrude downward from the lower edge 3 of the base 1 (FIG. 6 ( a) (b)).
[0015]
The step unit 25 includes a spacer 32 to form a spiral staircase 50 while forming support posts 42 from the support piece pieces 27 and 27 while vertically superimposing the support piece pieces 27 (FIG. 5C, FIG. 1). Figure 2). At this time, the bolts 35 are inserted into the connecting holes 13 and 13 of the adjacent upper and lower connecting plates 7 and 9 by the upper and lower column pieces 27 and 27, and the nuts 36 are screwed and fastened (FIG. 5B). c)).
[0016]
[Example 1]
Embodiments of the present invention will be described with reference to the drawings.
[0017]
[1] Configuration of the step unit 25 [0018]
A donut-shaped top having a central opening 11 formed in an upper opening and a lower opening of a cylindrical base body 1 opened up and down at an outer diameter D ₁ and a height L ₁ (formed according to the height of the kick-up) The connecting plate 7 and the lower connecting plate 9 are fitted and fixed respectively. The lower surface 10 of the lower connecting plate 7 projects downward by a distance L ₂ from the lower edge 3 of the base 1, and the upper surface 8 of the upper connecting plate 7 is positioned lower than the upper edge 2 of the base 1 by a distance L ₃ . (FIGS. 6A and 6B). That is, when the bases 1 and 1 are stacked one above the other, the lower side of the lower connecting plate 9 is rotatably inserted into the upper opening of the base 1 positioned below (L ₂ ≦ L ₃ ).
[0019]
Vertical connecting plate 7 and 9 are formed in the same shape, the central opening 11 is formed in the diameter D _2. A portion of the upper and lower connecting plates 7 and 9 excluding the central opening 11 is a peripheral portion 12, and the connecting holes 13 and 13 are annularly arranged in the peripheral portion 12 at equal intervals. The connecting hole 13 is formed at an angle α from the center, and the angle α is formed according to a required width of the tread (FIGS. 6 and 3A). Here, 16 connecting holes 13 are formed,
Angle α = 22.5 °
It is set to.
[0020]
On the outer surface 4 of the base 1, a partial fan-shaped tread 15 is projected in a substantially horizontal and radial manner. A reinforcing plate 20 is fixed at the center of the lower surface 17 of the tread plate 15 from the base end side (base side) to the front end side in the downward direction. The base end 21 of the tread plate 15 is formed high (thick), and formed low (thin) toward the front end 22, and the base end 21 is fixed to the outer surface 4 of the base 1.
[0021]
Further, the reinforcing plate 20 is located at the center of the two adjacent connecting holes 13 and 13. That is, it arrange | positions so that it may become an angle (beta) ((beta) = 11.25 degrees) from both the adjacent connection holes 13 and 13 (FIG. 3 (a)). Further, a rib 18 directed upward is formed on the upper edge of the tread plate 15, and a rib 19 directed downward is formed on the lower edge.
[0022]
As described above, the step unit 25 for one stage is formed (FIGS. 3A and 3B). Here, the structure in which the upper and lower connecting plates 7 and 9 are inserted and fixed to the base body 1 constitutes the column piece 27.
[0023]
[2] Configuration of spiral staircase 50
(1) The base body 1 of the first step (bottom) step unit 25a is formed with a height L ₄ (L ₄ > L ₁ ), and a bonding flange 31 is fixed to the lower surface, and the base 29 The flange 31 is fixed to the anchor bolts 30, 30 embedded in the base, and the step unit 25 a is fixed (FIG. 1).
[0025]
(2) Subsequently, the second step unit 25 and the third step unit 25 are piled up with the column pieces 27 and 27 while the tread plate 15 is inclined at a predetermined angle, and the upper and lower connecting plates 7 and 9 are bolts 35 and nuts. Assemble in order while connecting at 36.
[0026]
(3) That is, the column piece 27 of the upper step unit 25B to be newly attached is placed on the column piece 27 of the lower step unit 25A with a washer-like spacer 32 interposed therebetween (FIG. 5 (a)). )). The spacer 32 is arranged corresponding to the position where the bolt 35 is used. At this time, the tread plate 15 of the upper step unit 25B is shifted by a predetermined angle (ie, angle α = 22.5 °). In this case, since the angle α for shifting the tread plate 15 and the formation angle α of the connecting hole 13 are formed to be the same, the upper step unit 25B can be easily set at a predetermined position (FIG. 2B, FIG. 3). FIG. 6 (a) (b)).
[0027]
At this time, when the column pieces 27 are stacked one above the other, the lower side of the lower connecting plate 9 of the upper step unit 25B is rotatable to the upper opening of the base body 1 of the lower step unit 25A. Since it is inserted, the positioning of the connecting hole 13 can be easily performed while rotating the upper step unit 25B.
[0028]
At this time, a gap of a distance H (about H = 5 mm) is formed between the lower edge 3 of the base 1 of the column piece 27 of the upper step unit 25B and the lower edge 3 of the base 1 of the lower step unit 25A. (FIG. 3B, FIG. 5C). The spacer 32 is doughnut-shaped and has a through hole 33 communicating with the connection holes 13 and 13 of the upper and lower connection plates 7 and 9.
[0029]
Further, the lengths L ₂ and L ₃ of the upper and lower connecting plates 7 and 9 and the upper and lower edges 2 and ₃ are as follows.
L ₃ = L ₂ ,
A joint having a distance H corresponding to the thickness of the spacer 32 is formed. Therefore, by adjusting the thickness of the spacer 32, a uniform joint having an arbitrary length (distance H) can be formed between the column pieces 27 and 27, and an external appearance excellent in aesthetics can be configured.
[0030]
(4) Next, a hand is inserted from the central openings 11 and 11 of the upper and lower upper connecting plates 7 and 9 of the upper step unit 25B, and the bolts 35 are connected to the connecting holes 13 and spacers 32 of the lower upper connecting plate 7. The nut 36 is fastened and fixed through the through hole 33 and the connection hole 13 of the lower connection plate 9 on the upper side (FIGS. 5B and 5C). A total of eight bolts 36 are used for every other connecting hole 13.
[0031]
(5) Hereinafter, similarly, the step unit 25 is overlapped while the tread plate 15 is shifted, the upper and lower connecting plates 7 and 9 are fixed with the bolts 35 and the nuts 36, and the column pieces 27 and 27 are stacked.
[0032]
(6) Subsequently, the upper rib 18 of the step plate 15 of the lower step unit 25A is positioned below the lower rib 19 of the step plate 15 of the upper step unit 25B. Overlapping and common connecting column members 38 are erected at the overlapping portions, and the upper and lower treads 15 and 15 are connected by the connecting column members 38. That is, the connecting column member 38 is a rectangular tube, and the lower end portion of the connecting column member 38 is screwed on the lower side of the step plate 15 of the upper step unit 25B and the upper side of the step plate 15 of the lower step unit 25A. It fixes with 47 (FIG. 4).
[0033]
A handrail 40 on the outer peripheral side common to the upper and lower sides is attached to the upper ends of the adjacent connecting column members 38 and 38. Further, a punching metal cover plate 39 is inserted between the adjacent connecting column members 38 and 38, and both sides 38 a and 38 a of the cover plate 38 are fixed to the connecting column members 38 and 38.
[0034]
(7) The cap 48 is fixed to the upper surface of the uppermost column piece 27b to form the spiral staircase 50 (FIGS. 1 and 2). Here, struts 42 are formed from the stacked strut pieces 27, 27, metal fittings 44, 44 are fixed to the struts 42, and an inner handrail 45 is attached to the metal fittings 44, 44. Moreover, 46 is a landing (FIG. 1, FIG. 2 (a)).
[0035]
In the above, a plurality of (for example, two) step units 25 may be connected in advance, and the connected plurality of step units 25, 25 may be connected in the same manner as described above. In this case, a hand can be inserted from the central opening 11 and connected to a height that can be bolted (2 × L ₁ if there are two).
[0036]
(8) When renovating the spiral staircase, the cap 48 is removed, and the bolt 35 and the nut 36 of the column piece 27 are sequentially loosened and removed in the reverse order of the assembly, and can be easily disassembled. In this case, it is also possible to remove the plurality of column pieces 37, 37 collectively.
[0037]
[3] Other embodiments
(1) In the above embodiment, the upper and lower step units 25A and 25B are connected by eight bolts 35 and nuts 36 using every other connecting hole 13, but the number is small if a predetermined strength can be secured. It is also possible to connect with the number (for example, four) (not shown). In this case, the number of the connecting holes 13 of the upper and lower connecting plates 7 and 9 can be reduced depending on the bolt used. When the tread plate 15 is tilted at an angle α, the connection holes 13 and 13 necessary for inserting bolts are always in communication.
[0039]
(2) In the above embodiment, the upper and lower connecting plates 7 and 9 are circular donuts, but have a central opening 11 that can be fitted and fixed to the cylindrical base 1 and can be bolted, and If the annularly arranged connecting holes 13 and 13 can be formed, a polygonal shape (an octagon, a hexagon, etc.) can be used.
[0040]
(3) Moreover, in the said Example, although the cover board 39 which consists of punching metal was attached, if it is a means which can prevent a fall, other materials (for example, lattice-like fence etc.) can also be used. (Not shown).
[0041]
(4) In the above-described embodiment, one tread 15 is fixed to the cylindrical base 1, but two or more treads are shifted from the outer surface of one base 1 by a height L ₁ and an angle α. Can be fixed to form a step unit (not shown).
[0042]
(5) In the above-described embodiment, the spacer 32 has a washer shape (donut shape), but the shape is arbitrary as long as it is formed with a predetermined thickness. For example, it may be substantially the same shape as the upper and lower connecting plates 7 and 9 (not shown). That is, the through holes 33 and 33 are formed in the same arrangement as the connection holes 13 and 13, and a central opening corresponding to the central opening 11 is formed.
[0043]
【The invention's effect】
Since the support plate has the connecting plate fixed to the upper and lower openings, the support post can be configured while the connecting plate is fixed by inserting a bolt through the connecting hole of the connecting plate. Therefore, the columnar piece can be self-supported without using any other core material or the like, so that there is an effect that the spiral staircase can be easily assembled and disassembled. Further, since the adjacent upper and lower connecting plates are fixed independently, there is an effect that assembly or disassembly can be performed in a plurality of stages. Therefore, it becomes the optimal spiral staircase for renovation.
[0044]
Further, since the reinforcing plate is fixed to the lower surface and ribs are formed on the upper side and the lower side, the thickness of the step plate can be reduced to reduce the weight of the entire step unit.
[0045]
In addition, since the step unit has a shape corresponding to one or a plurality of steps, a smaller number of steps (for example, one step) makes it lighter and smaller, and can be transported and installed manually, eliminating the need for heavy machinery. There is an effect that can be made. In addition, since it can be rotated freely when the pillar pieces are stacked up and down, the stacking unit of the required number of steps can be stacked and the treads can be moved to one side during transportation, so there is no bulky effect during transportation. is there.
[Brief description of the drawings]
FIG. 1 is a front view of a spiral staircase according to an embodiment of the present invention.
FIG. 2A is a plan view in which a part is also omitted.
(B) is sectional drawing in the AA of FIG.
FIG. 3 is a unit step unit of the present invention, in which (a) is a plan view and (b) is a front view.
FIG. 4 is a side view of the same.
FIGS. 5A to 5C are longitudinal sectional views for explaining the connection by the support pieces. FIGS.
6A is a plan view, and FIG. 6B is a longitudinal cross-sectional view of a column piece according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 2 Upper edge 3 Base lower edge 4 Base outer surface 5 Base inner surface 7 Upper connecting plate 8 Upper connecting plate upper surface 9 Lower connecting plate 10 Lower connecting plate upper surface 11 Upper and lower connecting plate central opening 12 Upper and lower Connecting plate peripheral edge 13 Upper and lower connecting plate connecting hole 15 Tread plate 16 Tread plate upper surface 17 Tread plate lower surface 18 Tread plate rib (upper side)
19 Tread rib (lower side)
20 Reinforcement plate 25 Tread unit 27 Supporting piece 29 Base 30 Anchor bolt 32 Spacer 33 Spacer through hole 35 Bolt 36 Nut 38 Connecting vertical member 39 Cover plate 40 Handrail 42 on the outer peripheral side 42 Pillar 45 Handrail 46 on the inner peripheral side 50 spiral staircase

Claims

A step unit for a spiral staircase that is formed of a strut piece having one or a plurality of steps for a spiral staircase, the strut pieces being stacked up and down to form a strut,
The column pieces are inserted and fixed to the upper and lower openings of the cylindrical base body opened up and down, respectively, with the upper connecting plate and the lower connecting plate having a central opening,
According to the angle at which the tread plate is shifted in the upper and lower connection plates, a connection hole is formed through which bolts arranged in a ring at predetermined intervals are inserted,
The lower surface of the lower connecting plate is located below the lower edge of the support piece, the upper surface of the upper connecting plate is located below the upper edge of the support piece, and the center opening is inserted by an operator. A step unit for a spiral staircase having a diameter capable of tightening the bolt inserted into the connection hole .

The step unit for a spiral staircase according to claim 1, wherein the step board fixes a radial reinforcing plate at the center of the lower surface, and ribs are formed on the upper side edge and the lower side edge, respectively.

The lower projecting portion of the lower connecting plate can be rotatably inserted into the upper opening of the base of the support piece of the lower step unit when another step unit is stacked on the lower side. A step unit for spiral stairs.

(1) A doughnut-shaped connecting plate having connecting holes on the top and bottom is inserted and fixed in the upper and lower openings of the cylindrical base body to form a column piece, and a fan-shaped step plate is provided on the outer surface of the column piece , A step unit is formed in which a central opening having a diameter that allows an operator to put his / her hand is formed in the connecting plate .
(2) A predetermined number of the step units is formed by stacking each column piece and configuring the column from the column pieces to be connected.
(3) said each strut piece, while shifting the treadle, the putting worker from the central opening hand, connecting and fixing by inserting bolts into the coupling hole of the upper and lower connecting plate adjacent.
(4) A spiral staircase characterized in that a tread board is attached in a spiral manner around a support as described above.

The spiral staircase according to claim 4, wherein a front end portion of the reference tread plate and a rear end portion of the immediately upper step tread plate are connected by a connecting vertical member, and a panel is fixed between the connecting vertical members.

The spiral staircase according to claim 4, wherein a spacer is interposed between the upper connecting plate and the lower connecting plate facing each other when the support pieces are stacked up and down.