JP2012041678A

JP2012041678A - Support member, tenon material and temporary scaffold

Info

Publication number: JP2012041678A
Application number: JP2010181023A
Authority: JP
Inventors: Shinji Yoshida; 信二吉田; Junji Inamori; 純二稲森; Hiroyuki Yokoyama; 博之横山; Yoichiro Minami; 陽一朗南
Original assignee: Nippon Steel and Sumikin Metal Products Co Ltd
Current assignee: Nippon Steel Metal Products Co Ltd
Priority date: 2010-08-12
Filing date: 2010-08-12
Publication date: 2012-03-01

Abstract

PROBLEM TO BE SOLVED: To provide a temporary scaffold constructed by connecting support members with a smaller diameter and others in the longitudinal direction through a tenon material that can surely prevent support members and others for another scaffold from being mixed and used.SOLUTION: Provided are a support member comprising a hollow tube in which a cross section at least at both ends is elliptical, a tenon material comprising a short tube material with an elliptical cross section and a temporary scaffold having the support member or the tenon material incorporated.

Description

本発明は、建築現場や土木現場等の工事現場において、屋内外で用いられる仮設足場のうち、特にくさび緊結式足場やシステム支保工等で用いられる支柱部材およびホゾ材ならびにこの支柱部材とホゾ材を組み込んでなる仮設足場に関する。 The present invention relates to a strut member and a tenon material particularly used in a wedge-type scaffold and a system support among temporary scaffolds used indoors and outdoors in a construction site such as a construction site and a civil engineering site, and the strut member and the tenon material. The present invention relates to a temporary scaffold that incorporates.

工事現場における仮設足場には、主としてビルの施工時などに用いられる枠組足場、主として住宅の施工時などに用いられる単管足場やくさび緊結式足場などがあり、また、システム支保工（型枠支保工ともいう。）、ローリングタワーなども仮設足場の一態様である。 Temporary scaffolds at construction sites include frame scaffolds used mainly during construction of buildings, single pipe scaffolds used mainly during construction of houses and wedge-tight scaffolds, and system support (form support) A rolling tower is also an example of a temporary scaffold.

例えば、仮設足場には、コマ等の連結金具を側面に設けた支柱部材とつなぎ材（水平材ともいう。また、短尺のつなぎ材のことを特に腕木材ということがある。）を使用するタイプ（くさび緊結式足場）と、縦柱（建地材ともいう。）と横桟（横地材ともいう。）から構成されるＨ形状や鳥居形状等の建枠を使用するタイプ（枠組足場）があり、いずれも対面するつなぎ材の間又は横桟の間に床付き布枠（布板ともいう。）が架け渡されて、作業床や作業員の通路などとして使用される。また、システム支保工はコマ等の連結金具を側面に設けた支柱部材を縦方向に連結してなる支柱を行列状に配置し、これらの支柱部材の連結金具の間を長短２種のつなぎ材（水平材ともいう。）で水平２方向に連結することによって形成される緊結構造物であって、対面するつなぎ材の間に床付き布枠を適宜架け渡すことで作業床や作業員の通路などとして使用することができる（以下、システム支保工という。）。なお、支柱部材、つなぎ材、建枠等には、鋼製やアルミニウム製などの管が用いられることが多い。 For example, in a temporary scaffold, a type using a support member having a connecting piece such as a frame provided on a side surface and a connecting material (also referred to as a horizontal material. In addition, a short connecting material is sometimes referred to as an arm wood). There is a type (framework scaffold) that uses a building frame such as an H shape or a torii shape, which is composed of a (wedge binding type scaffold), a vertical column (also called building material), and a horizontal beam (also called horizontal material). In any case, a cloth frame with a floor (also called cloth board) is bridged between the connecting materials facing each other or between the cross rails and used as a work floor or a passage for workers. In addition, the system support works are arranged in a matrix of columns that are formed by connecting column members, such as frames, that are provided on the side surfaces in a vertical direction, and two types of long and short connecting materials between the connection members of these column members. Tightened structure formed by connecting in two horizontal directions (also referred to as horizontal material), such as work floors and worker's passages by appropriately laying a cloth frame with a floor between facing facing materials (Hereinafter referred to as system support work). In addition, pipes made of steel or aluminum are often used for support members, connecting materials, building frames, and the like.

このように、くさび緊結式足場やシステム支保工においては、支柱部材が用いられる。なお、支柱部材の側面に設けられる連結金具としては、支柱部材の側面に複数個設けられるコマや、支柱部材の側面に環状に設けられるフランジ等を用いることができる。そして、つなぎ部材の端部に設けられるクサビ金具をコマやフランジなどの連結金具に取り付け、クサビ緊結によって連結することができる。 As described above, in the wedge-tight scaffold or system support work, the support member is used. In addition, as a connection metal fitting provided in the side surface of a support | pillar member, the top etc. which are provided in multiple numbers on the side of a support | pillar member, the flange provided cyclically | annularly in the side of a support | pillar member, etc. can be used. And the wedge metal provided in the edge part of a connecting member can be attached to connection metal fittings, such as a top and a flange, and it can connect by wedge tightness.

くさび緊結式足場においては、コマ等の連結金具を側面に設けた支柱部材に、つなぎ材、ブレース材、手摺部材の足場構成部材を連結金具を介して取り付け、そして、連結金具においてクサビによってこれらの足場構成部材を緊結した後、床付き布枠を１枚又は２枚以上架け渡すことによって、仮設足場の一段目が組み立てられる。その後、この作業を繰り返すことによって、枠組足場の一段目の上に枠組足場の二段目以降が組み立てられ、複数段の枠組足場を建物に隣接して組み上げるのである。したがって、下段の足場の上に上段の足場を組み立てる際には、既に立設されている支柱部材の上に、別の支柱部材がホゾ材を介して縦方向に連結される。 In a wedge-type scaffold, a scaffolding member such as a connecting member, a brace material, and a handrail member is attached to a support member having a connecting member such as a frame on the side surface via the connecting member. After fastening the scaffold component, the first stage of the temporary scaffold is assembled by linking one or more cloth frames with a floor. Thereafter, by repeating this operation, the second and subsequent stages of the frame scaffold are assembled on the first stage of the frame scaffold, and a plurality of frame scaffolds are assembled adjacent to the building. Therefore, when assembling the upper scaffold on the lower scaffold, another strut member is vertically connected to the strut member that has already been erected via the hoses.

一方、システム支保工は、コンクリート構造物等を施工する際によく用いられる緊結構造物であり、コマ等の連結金具を側面に設けた支柱部材をホゾ材を介して縦方向に連結してなる支柱を、地上又は床面上に行列上に立設し、支柱を構成する各支柱部材の連結部の間につなぎ材を水平面上の直角２方向に配置し、この水平方向のつなぎ材によって形成される水平面上で各支柱部材間をクサビによって緊結することによって多段に組み立てられる。 On the other hand, the system support work is a tightly-fitting structure that is often used when constructing a concrete structure or the like, and is formed by vertically connecting a column member provided with a connecting bracket such as a frame on the side surface through a hozo material. Struts are erected on a line on the ground or on the floor, and connecting materials are arranged in two directions at right angles on the horizontal plane between the connecting parts of each strut member constituting the struts, and formed by this horizontal connecting material It is assembled in multiple stages by tightly connecting the support members with wedges on a horizontal plane.

このように、ホゾ材はくさび緊結式足場やシステム支保工において、円管からなる支柱部材を縦方向に連結するために用いられるが、ホゾ材は枠組足場において円管からなる縦柱を縦方向に連結する際にも用いられる。 In this way, hozo materials are used to connect pillar members made of circular pipes in the vertical direction in wedge-tightened scaffolds and system support works, but hozo materials are made of vertical columns made of circular pipes in frame scaffolds in the vertical direction. It is also used when connecting to.

ホゾ材の基本的構成は、一般的には連結すべき２本の円管の両方の端部に内嵌できる外径を有する短管部材である。ただし、ホゾ材には埋め込みタイプ（図１）と連結ピンタイプ（図２）の２種類がある。ここで、図１および２は、(a)が正面図を、(b)が上面図をそれぞれ示す。 The basic structure of the hozo material is a short tube member having an outer diameter that can be fitted into both ends of two circular tubes to be connected. However, there are two types of tenon materials: embedded type (FIG. 1) and connecting pin type (FIG. 2). Here, in FIGS. 1 and 2, (a) shows a front view and (b) shows a top view.

図１に示す埋め込みタイプのホゾ材１１は、その短管部材の一部を予め円管の上端に内嵌させ溶接等で接合した状態で使用されるものであり、その短管部材の残部をその円管から上部に突出させている。そして、この短管部材の上部の突出部分に別の円管の下端を外嵌させることによって、円管同士を縦方向に連結することができる。なお、埋め込みタイプのホゾ材は支柱部材を連結する際に用いられることが多い。 The embedded type hozo material 11 shown in FIG. 1 is used in a state in which a part of the short pipe member is previously fitted in the upper end of the circular pipe and joined by welding or the like, and the remaining part of the short pipe member is used. It protrudes upward from the circular tube. And the circular tubes can be connected in the vertical direction by fitting the lower end of another circular tube to the protruding portion at the top of the short tube member. In addition, the embedded type tenon material is often used when connecting the support members.

図２に示す連結ピンタイプのホゾ材１２は、その短管部材の一部を予め円管の上端に内嵌させ連結ピンによって取り付けた状態で使用されるものであり、その短管部材の残部をその円管の上部に突出させている。ただし、埋め込みタイプとは異なり、連結ピンタイプのホゾ材１２は必要に応じて円管の上端から取り外すことができる。また、その短管部材の一部を円管の一端に内嵌させたときにホゾ材１２が円管内に落ち込まないように、通常は、短管部材の中央部に固定部材を設けたりすることによってその外径を大きくし、連結すべき円管の外径とほぼ同一の外径にしている。そして、この短管部材の上部の突出部分に別の円管の下端を外嵌させることによって、円管同士を縦方向に連結することができる。なお、連結ピンタイプのホゾ材は建枠の縦柱を連結する際に用いられることが多い。 The connecting pin type hozzo material 12 shown in FIG. 2 is used in a state in which a part of the short pipe member is fitted in the upper end of the circular pipe in advance and attached with the connecting pin, and the remaining part of the short pipe member Protrudes from the top of the tube. However, unlike the embedded type, the connecting pin type hojo material 12 can be removed from the upper end of the circular tube as needed. In addition, usually, a fixing member is provided at the center of the short tube member so that the hozo member 12 does not fall into the circular tube when a part of the short tube member is fitted into one end of the circular tube. Therefore, the outer diameter is increased so that the outer diameter of the circular pipes to be connected is almost the same. And the circular tubes can be connected in the vertical direction by fitting the lower end of another circular tube to the protruding portion at the top of the short tube member. In addition, the connecting pin type hozo material is often used when connecting the vertical columns of the building frame.

以下に、クサビ緊結式足場、枠組足場、システム支保工の順に、図面を用いて、その構造と組み立て方を説明する。 In the following, the structure and assembly method will be described with reference to the drawings in the order of wedge-tightened scaffold, frame scaffold, and system support.

まず、図３に、くさび緊結式足場の構造の一例を示す。(a)はくさび緊結式足場の正面図、(b)は(a)において円で示されたコマの周辺の拡大図、そして、(c)はくさび緊結式足場の右側面図である。 First, FIG. 3 shows an example of the structure of a wedge-tight scaffold. (a) is a front view of a wedge-binding scaffold, (b) is an enlarged view of the periphery of the top indicated by a circle in (a), and (c) is a right side view of the wedge-binding scaffold.

ここでは、くさび緊結式足場の支柱１が建物１４の側とその反対側に各３本が立設されている。各々の支柱１は、複数のコマ４を有する支柱部材３を、予めその上端部に接合された埋め込みタイプのホゾ材１１を介して縦方向に継ぎ足すことによって形成されている。建物側の支柱１と建物とは反対側の支柱１の間には、コマ４を介してつなぎ材２が取り付けられ、コマ４においてクサビ２ａで緊結されている。建物側の隣接する支柱１の間には、コマ４を介してブレース材２１が斜めに取り付けられ、また、建物とは反対側の隣接する支柱１の間には、コマ４を介して手摺部材２０が取り付けられ、それぞれ、コマ４においてクサビで緊結されている。そして、隣接するつなぎ材２の間に、床付き布枠９を１枚又は２枚以上架け渡すことで、１段目の足場が形成される。なお、ブレース材２１は建物とは反対側の支柱１の間に取り付ける場合もある。 Here, three support columns 1 of the wedge-binding scaffold are erected on the building 14 side and on the opposite side. Each strut 1 is formed by adding a strut member 3 having a plurality of tops 4 in the vertical direction via an embedded type hozo material 11 previously joined to the upper end portion thereof. Between the pillar 1 on the building side and the pillar 1 on the opposite side of the building, a connecting material 2 is attached via a frame 4, and the frame 4 is fastened with a wedge 2a. A brace member 21 is diagonally attached between the adjacent struts 1 on the building side via the top 4, and a handrail member is interposed between the adjacent struts 1 on the side opposite to the building via the top 4. 20 are attached and are fastened with wedges in the top 4 respectively. And the 1st step | paragraph scaffold is formed by spanning the cloth frame 9 with a floor between the adjacent connecting materials 2, or 1 sheet or 2 sheets or more. The brace material 21 may be attached between the columns 1 on the opposite side of the building.

２段目の足場は、１段目の足場と同様にして形成される。１段目の足場の支柱部材３の上部に接合された埋め込みタイプのホゾ材１１を介して、別途用意した支柱部材３を縦方向に継ぎ足した上で、つなぎ材２、ブレース材２１、手摺部材２０の足場構成部材をコマ４を介して取り付け、そして、コマ４においてクサビ２ａによってこれらの足場構成部材を緊結した後、隣接するつなぎ材２の間に、床付き布枠９を１枚又は２枚以上架け渡すことによって、形成される。これを順次繰り返すことによって、複数段のくさび緊結式足場が組み立てられる。 The second stage scaffold is formed in the same manner as the first stage scaffold. A separately prepared strut member 3 is added in the vertical direction via an embedding type hozo material 11 joined to the upper part of the strut member 3 of the first stage scaffolding, and then the connecting material 2, the brace material 21, and the handrail member After attaching 20 scaffolding components through the top 4 and fastening these scaffolding components with the wedges 2a at the top 4, one or two cloth frames 9 with floors are provided between the adjacent connecting members 2. It is formed by spanning more than one. By repeating this in sequence, a multi-stage wedge-binding scaffold is assembled.

次に、図４に、鳥居形状の建枠（以下、「鳥居枠」という。）を用いて枠組足場を形成する一例を示す。(a)が正面図、(b)が右側面図である。 Next, FIG. 4 shows an example of forming a frame scaffold using a torii-shaped building frame (hereinafter referred to as “torii frame”). (a) is a front view, (b) is a right side view.

まず３個の鳥居枠２４を建物１４とは直角に等間隔に並べ、隣接する鳥居枠２４との間に、建物とは反対側に筋違２５をロック金具２８ｂに取り付け、そして建物側にも筋違２５をロック金具２８ａに取り付けて、１段目の鳥居枠２４を自立させることによって、１段目の足場を形成する。なお、連結ピンタイプのホゾ材１２は予め鳥居枠２４の縦柱２２の上端部に内嵌されている。その後、１段目の隣接する鳥居枠２４の上部の横桟２３の間に２段目の足場板となる床付き布枠９を架け渡した後、既に立設した１段目の鳥居枠２４の縦柱２２に、予めその上端部に内嵌されている連結ピンタイプのホゾ材１２を介して、別途用意した鳥居枠２４の縦柱２２の下部を載置して固定することによって、２段目の鳥居枠２４を立設する。その後、１段目と同様にして、建物とは反対側に筋違２５をロック金具２８ｂに取り付け、そして、建物側にも筋違２５をロック金具２８ａに取り付けて、２段目の鳥居枠２４を自立させることによって、２段目の足場を形成する。その後、２段目の隣接する鳥居枠２４の上部の横桟２３の間に３段目の足場板となる床付き布枠９を架け渡した後、既に立設した２段目の鳥居枠２４の縦柱２２に、予めその上端部に内嵌されている連結ピンタイプのホゾ材１２を介して、別途用意した鳥居枠２４の縦柱２２の下部を連結することによって、３段目の鳥居枠２４を立設する。その後、２段目と同様にして、建物とは反対側に筋違２５をロック金具２８ｂに取り付け、そして、建物側にも筋違２５をロック金具２８ａに取り付けて、３段目の鳥居枠２４を自立させることによって、３段目の足場を形成する。このようにして、必要な段数になるまで枠組足場を形成する。なお、ここでは筋違を用いることによって各段の枠組を自立させる手順を説明したが、筋違の一部を手摺枠に置き換えて各段の枠組を自立させてもよい。 First, three torii frames 24 are arranged at equal intervals at right angles to the building 14, and a streak 25 is attached to the lock fitting 28 b on the opposite side of the building between the adjacent torii frames 24, and also on the building side The first stage scaffolding is formed by attaching the striation 25 to the lock fitting 28a and allowing the first stage torii frame 24 to stand on its own. Note that the connecting pin type hojo material 12 is fitted in the upper end portion of the vertical column 22 of the torii frame 24 in advance. After that, a floor-mounted cloth frame 9 serving as a second-stage scaffolding plate is bridged between the horizontal rails 23 above the first-stage adjacent torii frame 24, and then the first-stage torii frame 24 already erected. The lower portion of the vertical column 22 of the torii frame 24 prepared separately is placed and fixed to the vertical column 22 via the connecting pin type hojo material 12 fitted in the upper end of the column 22 in advance. A torii frame 24 at the stage is set up. Thereafter, in the same manner as in the first stage, the streak 25 is attached to the lock fitting 28b on the opposite side of the building, and the streak 25 is also attached to the lock fitting 28a on the building side so that the second stage torii frame 24 is attached. The second stage scaffolding is formed by allowing the to stand independently. After that, a floor-mounted cloth frame 9 serving as a third-stage scaffolding plate is bridged between the horizontal rails 23 on the upper side of the second-stage adjacent torii frame 24, and then the second-stage torii frame 24 already erected. By connecting the lower part of the vertical column 22 of the torii frame 24 prepared separately to the vertical column 22 via a connecting pin type hojo material 12 fitted in the upper end of the column 22 in advance. The frame 24 is erected. Thereafter, in the same manner as in the second stage, the streak 25 is attached to the lock fitting 28b on the opposite side of the building, and the streak 25 is also attached to the lock fitting 28a on the building side to provide the third stage torii frame 24. A third-stage scaffolding is formed by allowing the to stand independently. In this way, the frame scaffold is formed until the required number of steps is reached. In addition, although the procedure which makes the frame of each step self-supporting by using a strut is described here, the frame of each step may be made self-supporting by replacing a part of the strut with a handrail frame.

図５は、システム支保工の一例を示す正面図であり、図６は図５のシステム支保工の右側面図である。また、図７は、図６のＡ−Ａ線断面平面図である。 FIG. 5 is a front view showing an example of the system support work, and FIG. 6 is a right side view of the system support work of FIG. FIG. 7 is a cross-sectional plan view taken along line AA in FIG.

この例では、このシステム支保工１００は、コンクリート構造物（スラブともいう。）１０１の上部の型枠１０２の下面を支えるように、地上から数ｍ〜十数ｍの高さで設置されている。 In this example, the system support work 100 is installed at a height of several m to several tens of m above the ground so as to support the lower surface of the formwork 102 above the concrete structure (also referred to as slab) 101. .

システム支保工１００は、所定の間隔で複数の支柱１を行列状に配置し、そして、隣接する支柱１の間を複数のつなぎ材２で水平２方向に連結することによって形成される。各支柱１は、埋め込みタイプのホゾ材１１を介して縦方向に連結された複数の支柱部材３からなる。各支柱１の下端は、ジャッキベース５によって支持されている。各支柱１の上端には、大引受ジャッキ６が取り付けられ、大引受ジャッキ６上に複数の大引材７が載置されている。また、複数の大引材７に直交するように、複数の大引材７上に複数の根太材８が載置され、複数の根太材８上に型枠１０２が載置されている。 The system support 100 is formed by arranging a plurality of support pillars 1 in a matrix at predetermined intervals and connecting the adjacent support pillars 1 in the two horizontal directions with a plurality of connecting members 2. Each strut 1 is composed of a plurality of strut members 3 that are connected in the vertical direction via embedded type hoses 11. The lower end of each column 1 is supported by a jack base 5. A large jack jack 6 is attached to the upper end of each strut 1, and a plurality of large pull materials 7 are placed on the large jack jack 6. Further, a plurality of joists 8 are placed on the plurality of large joists 7 and the formwork 102 is placed on the plurality of joists 8 so as to be orthogonal to the large joists 7.

支柱１の側面には、所定の間隔で４つのコマ４が十字状に形成されている。つなぎ材２は、つなぎ材２の両端部に接合されたクサビ部を介してコマ４に連結され、クサビ２ａによって緊結されている。なお、ここでは、各支柱部材３の中央部のコマ４にはつなぎ材２が取り付けられていないが、各支柱部材３の中央部のコマ４にもつなぎ材２を取り付けてもよい。 Four frames 4 are formed in a cross shape at predetermined intervals on the side surface of the column 1. The connecting material 2 is connected to the top 4 via a wedge portion joined to both ends of the connecting material 2 and is fastened by a wedge 2a. Here, the connecting material 2 is not attached to the central piece 4 of each support member 3, but the connecting material 2 may be attached to the central piece 4 of each support member 3.

そして、図７に示すように、対面するつなぎ材２の間に床付き布枠９を架け渡す。同様にして、他の個所にも床付き布枠９を架け渡すことで、適宜必要な個所に作業床や作業員の通路などとして使用する足場を形成することができる。ここでは、対面する短尺のつなぎ材２の間に２枚の床付き布枠が並べて架け渡されることによって１つの足場が形成されていて、作業床又は通路として使用される。 And as shown in FIG. 7, the cloth frame 9 with a floor is bridged between the connecting material 2 which faces. In the same manner, a scaffold for use as a work floor or a worker's passage can be formed where necessary by laying the cloth frame 9 with a floor on other places. Here, two scaffolds with floors are laid across the short tie material 2 facing each other to form one scaffold, which is used as a work floor or a passage.

このように、ホゾ材はくさび緊結式足場やシステム支保工において支柱部材を縦方向に連結するために用いられるだけでなく、枠組足場において建枠の縦柱間を縦方向に連結する際にも用いられる。 In this way, the hojo material is used not only for connecting the strut members in the vertical direction in the wedge-type scaffolding and system support work but also in connecting the vertical columns of the building frame in the vertical direction in the frame scaffolding. Used.

このホゾ材に関しては、枠組足場についてではあるが、上下の足場間の高さを高くするための工夫が提案されている（特許文献１）。また、ホゾ材間を連結する連結杆を設けることが提案されている（特許文献２参照）。しかし、その形状についての新たな提案はなされていない。 With regard to this hozo material, a contrivance for increasing the height between the upper and lower scaffolds has been proposed (Patent Document 1). In addition, it has been proposed to provide a connecting rod for connecting the tenons (see Patent Document 2). However, no new proposal has been made for the shape.

特開平０８−９３２１３号公報Japanese Patent Laid-Open No. 08-93213 特開２００１−３５６３号公報JP 2001-3563 A

このように、くさび緊結式足場とシステム支保工においては、いずれも、ホゾ材が用いられ、円管からなる支柱部材を縦方向に連結する役割を果たしている。また、ホゾ材は、枠組足場においても用いられ、円管からなる縦柱を縦方向に連結する役割を果たしている。ただし、その外径のサイズは連結する支柱部材の外径のサイズにより異なる。 As described above, in the wedge-tight scaffolding and the system support work, the hozo material is used, and plays a role of connecting the column members made of circular pipes in the vertical direction. The hozo material is also used in a framework scaffold, and plays a role of connecting vertical columns made of circular tubes in the vertical direction. However, the size of the outer diameter varies depending on the size of the outer diameter of the strut member to be connected.

ところで、くさび緊結式足場とシステム支保工において用いられる支柱部材はいずれも鋼管が通常用いられるが、そのサイズには次に示すとおりの違いがある。枠組足場の建枠の縦柱に通常用いられる鋼管のサイズも併せて示すと、次のとおりになる。なお、肉厚は通常、２．４ｍｍである。 By the way, steel pipes are usually used for the support members used in the wedge-tight scaffolding and the system support work, but there are differences as follows. The size of steel pipes usually used for the vertical column of the frame of the framework scaffold is also shown as follows. The wall thickness is usually 2.4 mm.

(i) くさび緊結式足場：中径管（外径４８．６ｍｍ）
(ii) システム支保工：大径管（外径６０．５ｍｍ）
(iii) 枠組足場：小径管（外径４２．７ｍｍ）
このように、足場の種類によって、支柱部材として用いられる鋼管のサイズが異なるのは、それぞれの足場の技術が発展してきた歴史の違いが関係している。 (i) Wedge-tight scaffold: medium diameter tube (outer diameter 48.6mm)
(ii) System support: Large diameter pipe (outer diameter 60.5mm)
(iii) Framework scaffold: small diameter tube (outer diameter 42.7 mm)
Thus, the difference in the size of the steel pipe used as the support member depending on the type of scaffold is related to the difference in the history of development of the technology of each scaffold.

すなわち、(i)くさび緊結式足場は１９５５年当時一般的であった丸太足場に用いる丸太（木材）を鋼管に切り換えた際に、その丸太に近い外径のサイズ（中径管：外径４８．６ｍｍ）の鋼管を支柱部材に用いて単管足場へと発展し、さらにくさび緊結式足場へと発展した際にも支柱部材のサイズはそのまま継承されたという経緯がある。 That is, (i) a wedge-tight scaffold is a size of an outer diameter close to the log (medium diameter pipe: outer diameter 48) when a log (wood) used for a log scaffold, which was common in 1955, is switched to a steel pipe. .6 mm) steel pipe was used as a strut member to develop into a single pipe scaffold, and even when it was further developed into a wedge-tight scaffold, the strut member size was inherited as it was.

次に、(ii)システム支保工は、一般建築の場合に多く用いられる２００ｍｍ厚のスラブではなく、原子力発電所の原子炉建屋や、下水処理場などの重スラブ（厚み５００〜１０００ｍｍ）を能率的に支保するために開発されたものであるため、その支柱に用いる鋼管として、高強度かつ人力による運搬と組立が可能な、外径６０．５ｍｍのサイズ（大径管）が選定されたのである。 Next, (ii) the system support works efficiently with heavy slabs (thickness 500-1000mm) such as nuclear power plant reactor buildings and sewage treatment plants, not 200mm-thick slabs that are often used in general construction. Because the steel pipe used for the support was selected as the steel pipe used for its support, the outer diameter was 60.5 mm (large diameter pipe) that can be transported and assembled by manpower. is there.

そして、(iii)枠組足場は１９５２年に米国のビティ社から導入されたものであるが、当初からその建枠の縦柱には、中径管（外径４２．７ｍｍ）の鋼管が用いられていて、長期間、そのサイズが受け継がれてきたのである。 (Iii) The frame scaffolding was introduced by the US company Viti in 1952. From the beginning, steel pipes with medium diameter pipes (outer diameter 42.7 mm) were used for the vertical columns of the building frames. And its size has been inherited for a long time.

しかしながら、最近は、現場の作業員の高齢化や女性作業員の進出などで、支柱部材の軽量化を求める傾向が強まっており、そのため支柱部材に、例えば、肉厚１．８ｍｍの薄肉高強度鋼管を使用することによって、外径を変更することなく軽量化を図る動きがある。 However, recently, with the aging of on-site workers and the advancement of female workers, there is an increasing tendency to require lighter support members. For this reason, for example, the support members have a thin high strength with a thickness of 1.8 mm. By using a steel pipe, there is a movement to reduce the weight without changing the outer diameter.

支柱部材の軽量化の手法としては、薄肉高強度鋼管の使用の外に、支柱部材の外径の小径化が考えられる。たとえば、(i)のくさび緊結式足場を例にとってみると、現在は肉厚２．４ｍｍの中径管（外径４８．６ｍｍ）を用いているが、これを(iii)の枠組足場で用いる鋼管と同じ外径の小径管（外径４２．７ｍｍ）に置き換えれば、肉厚は２．４ｍｍのままでも、外径の違いだけでほぼ２３％の軽量化を達成することができることになる。もちろん、支柱部材の小径化と薄肉化の両方を組み合わせることも可能であり、この場合はさらなる軽量化が達成できる。 As a method for reducing the weight of the support member, it is conceivable to reduce the diameter of the support member in addition to the use of a thin high-strength steel pipe. For example, taking the wedge-tight scaffold (i) as an example, we currently use a medium-diameter tube (outer diameter 48.6 mm) with a wall thickness of 2.4 mm, which is used in the framework scaffold (iii). If it is replaced with a small-diameter pipe (outer diameter 42.7 mm) having the same outer diameter as that of the steel pipe, a weight reduction of almost 23% can be achieved only by the difference in outer diameter even if the wall thickness remains 2.4 mm. Of course, it is possible to combine both the diameter reduction and the thickness reduction of the support member, and in this case, further weight reduction can be achieved.

ここで、(i)のくさび緊結式足場用の現行の中径管（外径４８．６ｍｍ）の支柱部材を小径管（外径４２．７ｍｍ）に置き換えると、(i)のくさび緊結式足場において用いる支柱部材のサイズと(iii)の枠組足場において用いる縦柱のサイズは両方とも同じ小径管（外径４２．７ｍｍ）となる。以下に、(i)のくさび緊結式足場用の支柱部材を小径管（外径４２．７ｍｍ）に置き換えた場合を想定してみる。 Here, when the support member of the current medium diameter pipe (outer diameter 48.6 mm) for the wedge-tightened scaffold of (i) is replaced with a small diameter pipe (outer diameter of 42.7 mm), the wedge-tightened scaffold of (i) Both the size of the column member used in the above and the size of the vertical column used in the frame scaffold of (iii) are the same small diameter pipe (outer diameter 42.7 mm). In the following, it is assumed that the support member for the wedge-tightening type scaffold (i) is replaced with a small diameter tube (outer diameter 42.7 mm).

ここで、支柱部材と縦柱が同じ外径の円管を用いる場合にも、それぞれ、支柱部材同士を連結して組み立てることと、縦柱同士を連結して組み立てることが求められる。すなわち、(i)のくさび緊結式足場用の支柱材の上にはくさび緊結式足場用の同種の支柱部材を連結して足場を組み立てることが求められ、そして、(iii)の枠組足場用の縦柱の上には枠組足場用の同種の縦柱を連結して足場を組み立てることが求められる。 Here, also in the case of using circular pipes having the same outer diameter for the column members and the vertical columns, it is required to connect and assemble the column members and to assemble the column columns. That is, it is required to assemble the scaffold by connecting the same kind of support members for the wedge-tightened scaffold on the support material for the wedge-tightened scaffold of (i), and for the framework scaffold of (iii) It is required to assemble a scaffold by connecting the same type of vertical pillars for frame scaffolds on the vertical pillars.

図８および図９は、それぞれ、従来例に係る支柱部材３および鳥居枠２４の一例（正面図）である。ただし、いずれも小径管（外径４２．７ｍｍ）の円管からなる支柱部材３および縦柱２２を有している。ここでは、支柱部材３の上端部３ａにはホゾ材（埋め込みタイプ）１１が、そして、縦柱２２の上端部２２ｃにはホゾ材（連結ピンタイプ）１２が取り付けられている。 FIGS. 8 and 9 are examples (front views) of the column member 3 and the torii frame 24 according to the conventional example, respectively. However, all have the column member 3 and the vertical column 22 which consist of a circular tube of a small diameter tube (outer diameter 42.7 mm). Here, a tenon material (embedded type) 11 is attached to the upper end portion 3 a of the column member 3, and a tenon material (connection pin type) 12 is attached to the upper end portion 22 c of the vertical column 22.

本来、図８の支柱部材３の上端部３ａの上には同種の支柱部材３の下端部３ｂが連結されるべきであり、そして、図９の縦柱２２の上端部２２ｃの上には同種の縦柱２２の下端部２２ｄが連結されるべきである。 Originally, the lower end 3b of the same type of column member 3 should be connected to the upper end 3a of the column member 3 of FIG. 8, and the same type of the upper end 22c of the vertical column 22 of FIG. The lower end 22d of the vertical column 22 should be connected.

しかしながら、作業員が誤って、(i)のくさび緊結式足場用の支柱部材３の上に(iii)の枠組足場用の縦柱２２を連結して足場を組み立てたり、逆に、(iii)の枠組足場用の縦柱２２の上に(i)のくさび緊結式足場用の支柱部材３を連結して足場を組み立てしたりして、「混在使用」となるおそれがある。 However, an operator mistakenly connects the vertical column 22 for the framework scaffold (iii) on the support member 3 for the wedge-tightened scaffold (i) to assemble the scaffold, or (iii) There is a risk of “mixed use” by assembling the scaffold by connecting the columnar scaffolding pillar member 3 of (i) on the vertical column 22 for the frame scaffold of (1) and assembling the scaffold.

図１０と図１１は、混在使用の例（正面図）である。 10 and 11 are examples (front view) of mixed use.

図１０は支柱部材３の上に縦柱２２を連結した例である。ここでは支柱部材３の上端部３ａの上に、ホゾ材（埋め込みタイプ）１１を介して、縦柱２２の下端部２２ｄが連結されている。 FIG. 10 shows an example in which a vertical column 22 is connected to the column member 3. Here, the lower end portion 22 d of the vertical column 22 is connected to the upper end portion 3 a of the support column member 3 via a tenon material (embedded type) 11.

一方、図１１は縦柱２２の上に支柱部材３を連結した例である。ここでは、縦柱２２の上端部２２ｃの上に、ホゾ材（連結ピンタイプ）１２を介して支柱部材３の下端部３ｂが連結されている。 On the other hand, FIG. 11 shows an example in which the column member 3 is connected to the vertical column 22. Here, the lower end portion 3 b of the column member 3 is connected to the upper end portion 22 c of the vertical column 22 via the tenon material (connection pin type) 12.

このような混在使用は、構造が異なり強度基準の異なる足場部材を組み合わせることになるので、足場の倒壊事故を引きおこす危険性がある。たとえば、(i)のくさび緊結式足場と(iii)の枠組足場での現行の許容支持力を比較すると、(i)は支柱部材２本当たり３３．６ＫＮであるのに対して、(iii)は縦柱２本当たり４２．６ＫＮとなる。したがって、このような混在使用は禁止すべきである。 Such mixed use involves combining scaffold members having different structures and different strength standards, and thus may cause a scaffold collapse accident. For example, when comparing the current allowable bearing capacity of the wedge-type scaffold of (i) and the framework scaffold of (iii), (i) is 33.6 KN per two strut members, Is 42.6KN per two vertical columns. Therefore, such mixed use should be prohibited.

このような違いを現場の作業者が正確に理解して、混在使用が起こらないように組立作業をすることを期待したいところであるが、建設現場での作業者の現状を考慮すると、現実的には混在使用が起こる可能性を否定できない。 I would like to expect the workers on the site to accurately understand these differences and perform assembly work so that mixed use does not occur, but considering the current situation of workers on the construction site, Cannot deny the possibility of mixed use.

以上は、(i)のくさび緊結式足場の支柱部材の小径化を例にとって、(i)のくさび緊結式足場と(iii)の枠組足場とでの混在使用の可能性を説明したが、(ii)のシステム支保工についてもその軽量化を図るために支柱部材を小径化しようとする際にも、同様に混在使用という問題が発生する。 As described above, taking the example of the diameter reduction of the strut member of the wedge-binding scaffold of (i) as an example, the possibility of the mixed use of the wedge-binding scaffold of (i) and the framework scaffold of (iii) has been explained. The system support work of ii) also has the problem of mixed use when attempting to reduce the diameter of the support member in order to reduce its weight.

本発明は、支柱部材等の小径化を図る際に他の足場用の支柱部材等との混在使用を防止するためになされたものであって、小径化した支柱部材等をホゾ材を介して縦方向に連結して仮設足場を組み立てる際に、異種の足場用の支柱部材や縦柱等の円管を連結することを確実に防止できる支柱部材およびホゾ材を提供すること並びにこれらの部材を組み込んでなる仮設足場を提供することを目的とする。 The present invention was made in order to prevent mixed use with other strut members for scaffolds when attempting to reduce the diameter of the strut members, etc. When assembling a temporary scaffold by connecting in a vertical direction, a support member for a different kind of scaffolding and a column member such as a vertical column that can be reliably prevented from being connected, and a hozo material are provided. The purpose is to provide a temporary scaffolding incorporated.

本発明者らは、上記のような問題点を解決するために種々の検討を重ねた。その結果、次の(a)〜(d)に示す知見を得た。なお、以下では、(i)のくさび緊結式足場の支柱部材の小径化を例にとって説明するが、異種の足場の支柱部材や縦柱等にも適用できる知見であることは言うまでもない。 The present inventors have made various studies in order to solve the above problems. As a result, the following findings (a) to (d) were obtained. In the following, description will be given by taking as an example the reduction in the diameter of the support member of the wedge-binding scaffold of (i), but it is needless to say that this knowledge can also be applied to support members, vertical columns, etc. of different types of scaffolds.

(a) 現行の仮設足場の支柱部材または縦柱に用いられる円管の外径は、通常、肉厚２．４ｍｍの小径管（外径４２．７ｍｍ）、中径管（外径４８．６ｍｍ）、大径管（外径６０．５ｍｍ）の３種類であるから、外径サイズの違いを視覚および触覚で知覚できる上に、外径サイズの違う円管を連結しようとしても、連結時の嵌合が不可能である。したがって、この３種類の外径サイズで使い分けている限り、混在使用が発生することはまず考えられない。 (a) The outer diameter of the circular pipe used for the column member or vertical column of the current temporary scaffold is usually 2.4 mm thick small diameter pipe (outer diameter 42.7 mm), medium diameter pipe (outer diameter 48.6 mm). ), Because there are three types of large-diameter pipes (outer diameter 60.5 mm), the difference in outer diameter size can be perceived visually and tactilely, and even when trying to connect circular pipes with different outer diameter sizes, Mating is impossible. Therefore, as long as these three types of outer diameter sizes are properly used, it is unlikely that mixed use will occur.

(b) しかしながら、くさび緊結式足場の支柱部材に用いられる円管を、軽量化目的で現行の中径管から小径管へと変更したときには、その支柱部材の円管は外径４２．７ｍｍの小径管となる。なお、支柱部材を小径化するだけでなく、薄肉化（たとえば、肉厚２．０ｍｍ）することも可能であり、この場合はさらなる軽量化が達成できる。 (b) However, when the circular tube used for the support member of the wedge-tightened scaffold is changed from the current medium diameter tube to the small diameter tube for the purpose of weight reduction, the support member circular tube has an outer diameter of 42.7 mm. It becomes a small diameter pipe. In addition to reducing the diameter of the support member, it is also possible to reduce the thickness (for example, thickness 2.0 mm). In this case, further weight reduction can be achieved.

しかし、枠組足場の縦柱の円管には同じく外径４２．７ｍｍの小径管が用いられてきたので、このままでは、両者の円管の間で混在使用が発生する可能性が高い。なお、現行の枠組足場の縦柱の小径管（外径４２．７ｍｍ、内径３７．９ｍｍ）を連結するためのホゾ材の基本的構成は、前述したとおり、連結すべき２本の円管の両方の端部に内嵌できる外径を有している。通常、縦柱の小径管の内径との間に遊びを持たせて、少なくとも両端部の外径が３６．４ｍｍの短管部材が用いられている。 However, since a small-diameter pipe having an outer diameter of 42.7 mm has been used for the circular cylinder of the vertical column of the framework scaffold, there is a high possibility that mixed use will occur between the two circular pipes. In addition, the basic structure of the hozo material for connecting the small-diameter pipes (outer diameter 42.7 mm, inner diameter 37.9 mm) of the vertical column of the current frame scaffolding is as described above. It has an outer diameter that can be fitted into both ends. Usually, a short pipe member having an outer diameter of at least 36.4 mm is used at least at both ends with play between the inner diameter of the small diameter pipes of the vertical column.

(c) 同じ外径を有する円管の場合、外径サイズの違いを視覚および触覚で知覚することは無理であることを考慮すると、小径管へ変更しようとするくさび緊結式足場用の支柱部材について、円管の端部の形状とホゾ材の形状を変更し、円管からなる縦柱との連結時の嵌合を不可能とすることによって、同じ外径サイズであっても、くさび緊結式足場の支柱部材の円管と枠組足場の縦柱の円管とを、連結することを機械的に防止できるとの着想を得た。 (c) In the case of circular tubes having the same outer diameter, considering that it is impossible to perceive the difference in outer diameter visually and tactilely, the support member for a wedge-tightened scaffold that is to be changed to a smaller diameter tube By changing the shape of the end of the circular tube and the shape of the hozo material and making it impossible to fit when connecting to the vertical column made of a circular tube, even with the same outer diameter size, the wedge is tightly connected The idea was that it was possible to mechanically prevent the connection between the circular pipe of the column member of the type scaffolding and the vertical pipe of the frame scaffolding.

(d) 具体的には、小径化した支柱部材の少なくとも両端部の断面を長円形状にするとともに、ここに内嵌および突出させるホゾ材の短管部材の断面を相似形の長円形状とすればよいことに思い至った。また、内嵌の代わりに、外嵌させてもよいことにも思い至った。 (d) Specifically, the cross section of at least both ends of the column member having a reduced diameter is made into an oval shape, and the cross section of the short tube member of the hozo material fitted and projected therein is made into a similar oval shape. I thought I should do it. Moreover, it came to the mind that you may make it fit externally instead of internal fit.

すなわち、小径化した支柱部材をホゾ材を介して連結する際に、少なくとも連結部の断面形状を長円形状とすることによって、連結部の断面形状を長円形状に小径化した支柱部材同士は嵌合できるが、連結部の断面形状が正円形状の縦柱とは嵌合できない。したがって、連結部の断面形状を長円形状に小径化した支柱部材同士は連結できるが、連結部の断面形状が正円形状の縦柱との連結を防止することができるのである。ここで、長円形状とは正円形状以外の円形状を意味し、たとえば、小判形状、楕円形状、扁平円形状などを挙げることができる。 That is, when connecting the strut members having a reduced diameter through the hozo material, at least the cross-sectional shape of the connecting portion is made into an oval shape, so that the strut members having a reduced cross-sectional shape of the connecting portion into an oval shape are Although it can be fitted, it cannot be fitted to a vertical column whose cross-sectional shape of the connecting portion is a perfect circle. Therefore, although the strut members whose cross-sectional shape of the connecting portion is reduced to an oval shape can be connected to each other, it is possible to prevent connection with a vertical column whose cross-sectional shape of the connecting portion is a perfect circle. Here, the oval shape means a circular shape other than a perfect circular shape, and examples thereof include an oval shape, an elliptical shape, and a flat circular shape.

(e) なお、小径化した支柱部材の断面は、少なくともホゾ材の短管部材を内嵌または外嵌する両端部の断面が長円形状であればよい。両端部以外の断面は、正円形状でもよく、長円形状でもよい。あるいは、正円形状や長円形状以外の形状でもよい。小径化した支柱部材の断面を長さ方向にわたって長円形状とした場合には、縦柱と小径化した支柱部材との違いを視覚および触覚で知覚できる。 (e) It should be noted that the cross section of the column member whose diameter has been reduced may be an oval cross section at least at both ends where the short tube member of the hozo material is internally or externally fitted. The cross section other than the both end portions may be a perfect circle shape or an oval shape. Or shapes other than a perfect circle shape and an ellipse shape may be sufficient. In the case where the cross section of the reduced-diameter column member is formed into an oval shape in the length direction, the difference between the vertical column and the reduced-diameter column member can be perceived visually and by touch.

本発明は、上記の知見に基づいて完成したものであって、その要旨は下記の(1)〜(5)の支柱部材およびホゾ材ならびに下記(6)の仮設足場にある。以下、総称して本発明という。 The present invention has been completed based on the above findings, and the gist of the present invention resides in the following strut members and hozo materials of (1) to (5) and the temporary scaffold of (6) below. Hereinafter, the present invention is collectively referred to as the present invention.

(1) 少なくとも両端部の断面が長円形状である中空管からなることを特徴とする支柱部材。 (1) A strut member comprising a hollow tube having an oval cross section at least at both ends.

(2) 断面が長円形状である短管部材からなることを特徴とするホゾ材。 (2) A tenon material comprising a short pipe member having an oval cross section.

(3) 断面が長円形状である短管部材であって、その中央部近辺の外径が両端部の外径よりも大きいことを特徴とするホゾ材。 (3) A horn member having a cross section of an oval cross-section, the outer diameter of the vicinity of the center being larger than the outer diameters of both ends.

(4) 断面が長円形状である短管部材であって、その中央部近辺の内径が両端部の内径よりも小さいことを特徴とするホゾ材。 (4) A slab member having an oval cross section and having an inner diameter in the vicinity of the center portion smaller than the inner diameters at both ends.

(5) 少なくとも両端部の断面が長円形状である中空管からなる支柱部材であって、支柱部材の端部に上記(2)〜(4)のいずれかのホゾ材を内嵌または外嵌することによって、このホゾ材を介して連結できることを特徴とする支柱部材。
(6) 少なくとも両端部の断面が長円形状である中空管からなる支柱部材であって、支柱部材の片端部に上記(2)〜(4)のいずれかのホゾ材の一部が内嵌または外嵌され他部が突出している状態で接合または取り付けられていることを特徴とする支柱部材。 (5) A strut member comprising a hollow tube having an oval cross section at least at both ends, and the end material of any one of the above (2) to (4) is fitted or removed at the end of the strut member The support | pillar member characterized by being able to connect via this tenon material by fitting.
(6) A strut member made of a hollow tube having a cross section of at least both end portions having an oval shape, and a part of the hozo material of any one of the above (2) to (4) is contained in one end portion of the strut member A strut member that is joined or attached in a state of being fitted or externally fitted and the other portion protruding.

(7) 上記(1)〜(6)の支柱部材またはホゾ材を組み込んだことを特徴とする仮設足場。 (7) A temporary scaffold characterized by incorporating the strut member or the tenon material described in (1) to (6) above.

本発明によれば、小径化した支柱部材等をホゾ材を介して縦方向に連結して仮設足場を組み立てる際に、他の足場用の支柱部材や縦柱等との混在使用を確実に防止することができる。 According to the present invention, when a temporary scaffolding is assembled by vertically connecting small-diameter strut members, etc., through a hozo material, it is surely prevented from being mixed with other scaffolding strut members and vertical columns. can do.

埋め込みタイプのホゾ材の一例（従来例）である。It is an example (conventional example) of an embedding type hozo material. 連結ピンタイプのホゾ材の一例（従来例）である。It is an example (conventional example) of a connecting pin type hozo material. くさび緊結式足場の構造の一例を示す。(a)はくさび緊結式足場の正面図、(b)は(a)において円で示されたコマの周辺の拡大図、そして、(c)はくさび緊結式足場の右側面図である。An example of the structure of a wedge-tight scaffold is shown. (a) is a front view of a wedge-binding scaffold, (b) is an enlarged view of the periphery of the top indicated by a circle in (a), and (c) is a right side view of the wedge-binding scaffold. 枠組足場の一例を示す。(a)が正面図、(b)が右側面図である。An example of a framework scaffold is shown. (a) is a front view, (b) is a right side view. システム支保工の一例を示す正面図である。It is a front view which shows an example of a system support construction. 図５のシステム支保工の右側面図である。It is a right view of the system support construction of FIG. 図６のＡ−Ａ線断面平面図である。It is the sectional view on the AA line of FIG. 小径管（外径４２．７ｍｍ）の支柱部材の一例（正面図）である。It is an example (front view) of a support | pillar member of a small diameter pipe (outer diameter 42.7 mm). 小径管（外径４２．７ｍｍ）の縦柱を有する鳥居枠の一例（正面図）である。It is an example (front view) of the torii frame which has a vertical column of a small diameter pipe (outer diameter 42.7 mm). 支柱部材の上に縦柱を連結した混在使用の例（正面図）である。It is an example (front view) of the mixed use which connected the vertical column on the support | pillar member. 縦柱の上に支柱部材を連結した混在使用の例（正面図）である。It is an example (front view) of the mixed use which connected the support | pillar member on the vertical column. 本発明に係る支柱部材および本発明に係るホゾ材（埋め込みタイプ）の一例である。(a)は正面図であり、(b)が上面図、そして、(c)が底面図である。It is an example of the support | pillar member which concerns on this invention, and the tenon material (embedding type) which concerns on this invention. (a) is a front view, (b) is a top view, and (c) is a bottom view. 図１２に示す支柱部材を縦方向に２本連結したときの連結部分を示す。(a)は正面図であり、(b)は(a)のＡ−Ａ矢視断面図である。The connection part when two support | pillar members shown in FIG. 12 are connected to the vertical direction is shown. (a) is a front view, (b) is an AA arrow sectional view of (a). 図１２に示す支柱部材の上に、建枠の縦柱の下端部を連結しようとしたときの連結部分を示す。(a)は正面図であり、(b)は(a)のＢ−Ｂ矢視断面図である。The connection part when it is going to connect the lower end part of the vertical column of a building frame on the support | pillar member shown in FIG. (a) is a front view, (b) is a BB arrow sectional drawing of (a). 図１２に示す支柱部材を、建枠の縦柱の上に連結しようとしたときの連結部分を示す。(a)は正面図であり、(b)は(a)のＣ−Ｃ矢視断面図である。The connection part when it is going to connect the support | pillar member shown in FIG. 12 on the vertical column of a building frame is shown. (a) is a front view, (b) is CC sectional view taken on the line of (a). 本発明に係る支柱部材および本発明に係るホゾ材（連結ピンタイプ）の他の例である。(a)は正面図であり、(b)が上面図、そして、(c)が底面図である。It is another example of the support | pillar member which concerns on this invention, and the tenon material (connection pin type) which concerns on this invention. (a) is a front view, (b) is a top view, and (c) is a bottom view. 図１６に示す支柱部材をホゾ材（連結ピンタイプ）を介して縦方向に２本連結したときの連結部分を示す。(a)は正面図であり、(b)は(a)のＡ−Ａ矢視断面図である。FIG. 17 shows a connecting portion when two strut members shown in FIG. 16 are connected in the vertical direction via a tenon material (connecting pin type). (a) is a front view, (b) is an AA arrow sectional view of (a). 図１６に示す支柱部材の上に、ホゾ材（連結ピンタイプ）を介して、建枠の縦柱を連結しようとしたときの連結部分を示す。(a)は正面図であり、(b)は(a)のＢ−Ｂ矢視断面図である。The connection part when it is going to connect the vertical column of a building frame on the support | pillar member shown in FIG. 16 via a hozo material (connection pin type) is shown. (a) is a front view, (b) is a BB arrow sectional drawing of (a). 図１６に示す支柱部材を、建枠の縦柱の上に連結しようとしたときの連結部分を示す。(a)は正面図であり、(b)は(a)のＣ−Ｃ矢視断面図である。The connection part when it is going to connect the support | pillar member shown in FIG. 16 on the vertical column of a building frame is shown. (a) is a front view, (b) is CC sectional view taken on the line of (a). 本発明に係る支柱部材および本発明に係るホゾ材（埋め込みタイプ）の他の例である。(a)は正面図であり、(b)が上面図、そして、(c)が底面図である。It is another example of the support | pillar member which concerns on this invention, and the tenon material (embedding type) which concerns on this invention. (a) is a front view, (b) is a top view, and (c) is a bottom view. 図２０に示す支柱部材を縦方向に２本連結したときの連結部分を示す。(a)は正面図であり、(b)は(a)のＡ−Ａ矢視断面図である。The connection part when two support | pillar members shown in FIG. 20 are connected to the vertical direction is shown. (a) is a front view, (b) is an AA arrow sectional view of (a). 図２０に示す支柱部材の上に、建枠の縦柱の下端部を連結しようとしたときの連結部分を示す。(a)は正面図であり、(b)は(a)のＢ−Ｂ矢視断面図である。The connection part when it is going to connect the lower end part of the vertical column of a building frame on the support | pillar member shown in FIG. (a) is a front view, (b) is a BB arrow sectional drawing of (a). 図２０に示す支柱部材を、建枠の縦柱の上端部２２ｃの上に連結しようとしたときの連結部分を示す。(a)は正面図であり、(b)は(a)のＣ−Ｃ矢視断面図である。The connection part when it is going to connect the support | pillar member shown in FIG. 20 on the upper end part 22c of the vertical column of a building frame is shown. (a) is a front view, (b) is CC sectional view taken on the line of (a).

以下、本発明の実施の形態に係る支柱部材およびホゾ材ならびに仮設足場について、実施例に基づいて説明する。なお、本発明は実施例に限定されるものではない。 Hereinafter, a column member, a tenon material, and a temporary scaffold according to an embodiment of the present invention will be described based on examples. In addition, this invention is not limited to an Example.

図１２は、本発明に係る支柱部材３３および本発明に係るホゾ材（埋め込みタイプ）３１の一例である。(a)は正面図であり、(b)が上面図、そして、(c)が底面図である。ただし、支柱部材３３の両端部以外は図示を省略している。 FIG. 12 is an example of the column member 33 according to the present invention and the burrow material (embedded type) 31 according to the present invention. (a) is a front view, (b) is a top view, and (c) is a bottom view. However, illustrations are omitted except for both ends of the column member 33.

この支柱部材３３は、肉厚が２．４ｍｍで外径が４２．７ｍｍの正円形の鋼管であるが、上端部３３ａの長さ５０ｍｍと下端部３３ｂの長さ８０ｍｍにおいては断面が小判形状（内面の長径４０．８５ｍｍ、短径３５ｍｍ）に加工されている。そして、この支柱部材３３の上端部３３ａには、断面が小判形状（外面の長径３９ｍｍ、短径３４ｍｍ）の短管部材からなるホゾ材３１の一部が内嵌され残部が突出している状態で溶接により接合されている。 The support member 33 is a regular circular steel pipe having a wall thickness of 2.4 mm and an outer diameter of 42.7 mm. However, the cross section of the upper end portion 33a is 50 mm and the lower end portion 33b is 80 mm in length. The inner surface has a major axis of 40.85 mm and a minor axis of 35 mm. The upper end portion 33a of the support column member 33 is partially fitted with a portion of a short tube member 31 made of a short tube member having an oval cross section (the outer surface has a major axis of 39 mm and a minor axis of 34 mm), and the remaining portion protrudes. They are joined by welding.

図１３に、図１２に示す支柱部材３３を、ホゾ材（埋め込みタイプ）３１を介して、縦方向に２本連結したときの連結部分を示す。(a)は正面図であり、(b)は(a)のＡ−Ａ矢視断面図である。 FIG. 13 shows a connecting portion when two support members 33 shown in FIG. 12 are connected in the vertical direction via the horn member (embedded type) 31. (a) is a front view, (b) is an AA arrow sectional view of (a).

支柱部材３３の下端部３３ｂの断面の小判形状（内面の長径４０．８５ｍｍ、短径３５ｍｍ）と、支柱部材３３の上端部３３ａに埋め込まれたホゾ材３１の短管部材の小判形状（外面の長径３９ｍｍ、短径３４ｍｍ）とは相似形であって、かつ嵌合できる内外径のサイズを有しているため、スムーズに連結することができることが分かる。 The oval shape of the cross section of the lower end portion 33b of the support member 33 (the inner diameter is 40.85 mm, the shorter diameter is 35 mm) and the oval shape of the short tube member 31 of the hozo material 31 embedded in the upper end portion 33a of the support member 33 (the outer surface It can be seen that the long diameter 39 mm and the short diameter 34 mm) are similar to each other and have a size of the inner and outer diameters that can be fitted, so that they can be smoothly connected.

図１４は、図１２に示す支柱部材３３の上に、ホゾ材（埋め込みタイプ）３１を介して、建枠の縦柱の下端部２２ｄを連結しようとしたときの連結部分を示す。(a)は正面図であり、(b)は(a)のＢ−ＢＡ矢視断面図である。 FIG. 14 shows a connecting portion when the lower end portion 22d of the vertical column of the building frame is to be connected to the column member 33 shown in FIG. (a) is a front view, (b) is a B-BA arrow sectional drawing of (a).

支柱部材３３の上端部３３ａに埋め込まれたホゾ材３１の短管部材の断面の小判形状（外面の長径３９ｍｍ、短径３４ｍｍ）に対して、肉厚が２．４ｍｍで外径が４２．７ｍｍの縦柱２２の下端部２２ｄの断面の正円形状（内径３７．９ｍｍ）を外嵌することはできないため、支柱部材３３の上に建枠の縦柱の下端部２２ｄを連結することができないことが分かる。 The wall thickness is 2.4 mm and the outer diameter is 42.7 mm with respect to the oval shape (outer surface major axis 39 mm, minor axis 34 mm) of the cross section of the short tube member of the hozo 31 embedded in the upper end portion 33 a of the column member 33. Since the round shape (inner diameter: 37.9 mm) of the lower end portion 22d of the vertical column 22 cannot be externally fitted, the lower end portion 22d of the vertical column of the building frame cannot be connected to the column member 33. I understand that.

図１５は、図１２に示す支柱部材３３を、連結ピンタイプのホゾ材１２を介して、建枠の縦柱の上端部２２ｃの上に連結しようとしたときの連結部分を示す。(a)は正面図であり、(b)は(a)のＣ−Ｃ矢視断面図である。 FIG. 15 shows a connecting portion when the column member 33 shown in FIG. 12 is connected to the upper end portion 22c of the vertical column of the building frame via the connecting pin type hojo material 12. (a) is a front view, (b) is CC sectional view taken on the line of (a).

肉厚が２．４ｍｍで外径が４２．７ｍｍの正円形状の縦柱（内径４０．３ｍｍ）の上端部２２ｃに、連結ピンタイプのホゾ材（両端部の外径３６．４ｍｍ）１２を介して、支柱部材３３の下端部３３ｂを連結しようとしても、支柱部材３３の下端部３３ｂの断面の小判形状（内面の長径４０．８５ｍｍ、短径３５ｍｍ）を外嵌することはできない。したがって、縦柱２２の上に支柱部材３３を連結することができないことが分かる。 A connecting pin type hozo material (outer diameters of 36.4 mm at both ends) 12 is attached to the upper end portion 22c of a vertical column (inner diameter of 40.3 mm) having a wall thickness of 2.4 mm and an outer diameter of 42.7 mm. Thus, even if the lower end portion 33b of the support column member 33 is to be connected, the oval shape of the cross section of the lower end portion 33b of the support column member 33 (inner major axis 40.85 mm, minor axis 35 mm) cannot be externally fitted. Therefore, it can be seen that the column member 33 cannot be connected to the vertical column 22.

図１６は、本発明に係る支柱部材３３および本発明に係るホゾ材（連結ピンタイプ）３２の他の例である。(a)は正面図であり、(b)が上面図、そして、(c)が底面図である。ただし、支柱部材３３の両端部以外は図示を省略している。 FIG. 16 shows another example of the column member 33 according to the present invention and the tenon material (connection pin type) 32 according to the present invention. (a) is a front view, (b) is a top view, and (c) is a bottom view. However, illustrations are omitted except for both ends of the column member 33.

この支柱部材３３は、肉厚が２．４ｍｍで外径が４２．７ｍｍの正円形の鋼管であるが、上端部３３ａの長さ５０ｍｍと下端部３３ｂの長さ８０ｍｍにおいては断面が小判形状（内面の長径４０．８５ｍｍ、短径３５ｍｍ）に加工されている。そして、この支柱部材３３の上端部３３ａには、連結ピンタイプの断面が小判形状の短管部材（外面の長径３９ｍｍ、短径３４ｍｍ）からなるホゾ材３２が、そのうちの下半分が支柱部材３３の上端３３ａに内嵌され上半分が上方に突出している状態で載置されている。ただし、その短管部材の中央部の外径を大きくし、連結すべき円管の外径とほぼ同一の外径にしている。 The support member 33 is a regular circular steel pipe having a wall thickness of 2.4 mm and an outer diameter of 42.7 mm. However, the cross section of the upper end portion 33a is 50 mm and the lower end portion 33b is 80 mm in length. The inner surface has a major axis of 40.85 mm and a minor axis of 35 mm. The upper end portion 33a of the support member 33 is formed with a short pin member 32 (a major surface having a major axis of 39 mm and a minor axis of 34 mm) having a cross section of a connecting pin type, the lower half of which is a support member 33. It is mounted in the state which is fitted in the upper end 33a, and the upper half protrudes upward. However, the outer diameter of the central portion of the short pipe member is increased so as to be substantially the same as the outer diameter of the circular pipe to be connected.

図１７に、図１６に示す支柱部材３３を、ホゾ材（連結ピンタイプ）３２を介して、縦方向に２本連結したときの連結部分を示す。(a)は正面図であり、(b)は(a)のＡ−Ａ矢視断面図である。 FIG. 17 shows a connecting portion when two support members 33 shown in FIG. 16 are connected in the vertical direction via a tenon material (connecting pin type) 32. (a) is a front view, (b) is an AA arrow sectional view of (a).

支柱部材３３の下端部３３ｂの断面の小判形状（内面の長径４０．８５ｍｍ、短径３５ｍｍ）と、支柱部材３３の上端部３３ａの上に載置する連結ピンタイプのホゾ材３２の短管部材の小判形状（外面の長径３９ｍｍ、短径３４ｍｍ）とは相似形であって、かつ嵌合できる内外径のサイズを有しているため、スムーズに載置することができることが分かる。 The oval shape of the cross section of the lower end portion 33b of the support member 33 (the inner diameter is 40.85 mm, the shorter diameter is 35 mm), and the short member of the connecting pin type hozo material 32 placed on the upper end portion 33a of the support member 33 The oval shape (the outer surface has a major axis of 39 mm and a minor axis of 34 mm) is similar in shape and has a size of an inner and outer diameter that can be fitted, so that it can be mounted smoothly.

図１８は、図１６に示す支柱部材３３の上に、ホゾ材（連結ピンタイプ）３２を介して、建枠の縦柱の下端部２２ｄを連結しようとしたときの連結部分を示す。(a)は正面図であり、(b)は(a)のＢ−Ｂ矢視断面図である。 FIG. 18 shows a connecting portion when the lower end portion 22d of the vertical column of the building frame is to be connected to the column member 33 shown in FIG. (a) is a front view, (b) is a BB arrow sectional drawing of (a).

支柱部材３３の上端部３３ａの上に載置されたホゾ材３２の短管部材の断面の小判形状（外面の長径３９ｍｍ、短径３４ｍｍ）に対して、肉厚が２．４ｍｍで外径が４２．７ｍｍの縦柱の下端部２２ｄの断面の正円形状（内径３７．９ｍ））を外嵌することはできないため、支柱部材３３の上に縦柱の下端部２２ｄを連結することができないことが分かる。 The wall thickness is 2.4 mm and the outer diameter is smaller than the oval shape (outer surface major axis 39 mm, minor axis 34 mm) of the short tube member of the hozo member 32 placed on the upper end 33 a of the column member 33. Since the circular shape (inner diameter: 37.9 m) of the cross section of the lower end portion 22d of the 42.7 mm vertical column cannot be externally fitted, the lower end portion 22d of the vertical column cannot be connected to the column member 33. I understand that.

図１９は、図１６に示す支柱部材３３を、連結ピンタイプのホゾ材１２を介して、建枠の縦柱の上端部２２ｃの上に連結しようとしたときの連結部分を示す。(a)は正面図であり、(b)は(a)のＣ−Ｃ矢視断面図である。 FIG. 19 shows a connecting portion when the column member 33 shown in FIG. 16 is connected to the upper end portion 22c of the vertical column of the building frame via the connecting pin type hojo material 12. (a) is a front view, (b) is CC sectional view taken on the line of (a).

図２０は、本発明に係る支柱部材３３および本発明に係るホゾ材（埋め込みタイプ）３１の他の例である。(a)は正面図であり、(b)が上面図、そして、(c)が底面図である。ただし、支柱部材３３の両端部以外は図示を省略している。 FIG. 20 shows another example of the supporting column member 33 according to the present invention and the tenon material (embedded type) 31 according to the present invention. (a) is a front view, (b) is a top view, and (c) is a bottom view. However, illustrations are omitted except for both ends of the column member 33.

この支柱部材３３は、肉厚が２．４ｍｍで断面が小判形状（内面の長径４０．８５ｍｍ、短径３５ｍｍ）の扁平鋼管からなる。そして、この支柱部材３３の上端部３３ａには、断面が小判形状（外面の長径３９ｍｍ、短径３４ｍｍ）の短管部材からなるホゾ材３１の一部が内嵌され残部が突出している状態で溶接により接合されている。 This strut member 33 is made of a flat steel pipe having a wall thickness of 2.4 mm and an oval cross section (long inner diameter: 40.85 mm, short diameter: 35 mm). The upper end portion 33a of the support column member 33 is partially fitted with a portion of a short tube member 31 made of a short tube member having an oval cross section (the outer surface has a major axis of 39 mm and a minor axis of 34 mm), and the remaining portion protrudes. They are joined by welding.

図２１に、図２０に示す支柱部材３３を、ホゾ材（埋め込みタイプ）３１を介して、縦方向に２本連結したときの連結部分を示す。(a)は正面図であり、(b)は(a)のＡ−Ａ矢視断面図である。 FIG. 21 shows a connecting portion when two supporting column members 33 shown in FIG. 20 are connected in the vertical direction via a tenon material (embedded type) 31. (a) is a front view, (b) is an AA arrow sectional view of (a).

支柱部材の断面の小判形状（内面の長径４０．８５ｍｍ、短径３５ｍｍ）と、支柱部材の上端部３３ａに埋め込まれたホゾ材３１の短管部材の小判形状（外面の長径３９ｍｍ、短径３４ｍｍ）とは相似形であって、かつ嵌合できる内外径のサイズを有しているため、スムーズに連結することができることが分かる。 The oval shape of the cross section of the column member (inner major axis 40.85 mm, minor axis 35 mm) and the oval shape of the short tube member 31 embedded in the upper end portion 33a of the column member (outer major axis 39 mm, minor axis 34 mm) ) Is similar and has a size of inner and outer diameters that can be fitted, so that it can be smoothly connected.

図２２は、図２０に示す支柱部材３３の上に、ホゾ材（埋め込みタイプ）３１を介して、建枠の縦柱の下端部２２ｄを連結しようとしたときの連結部分を示す。(a)は正面図であり、(b)は(a)のＢ−Ｂ矢視断面図である。 FIG. 22 shows a connecting portion when the lower end portion 22d of the vertical column of the building frame is to be connected to the column member 33 shown in FIG. (a) is a front view, (b) is a BB arrow sectional drawing of (a).

支柱部材の上端部３３ａに埋め込まれたホゾ材３１の短管部材の断面の小判形状（外面の長径３９ｍｍ、短径３４ｍｍ）に対して、肉厚が２．４ｍｍで外径が４２．７ｍｍの縦柱２２の下端部２２ｄの断面の正円形状（内径３７．９ｍｍ）を外嵌することはできないため、支柱部材３３の上に建枠の縦柱の下端部２２ｄを連結することができないことが分かる。 The wall thickness is 2.4 mm and the outer diameter is 42.7 mm with respect to the oval shape (outer surface major axis 39 mm, minor axis 34 mm) of the cross section of the short tube member embedded in the upper end portion 33 a of the column member. Since the round shape (inner diameter 37.9 mm) of the cross section of the lower end portion 22d of the vertical column 22 cannot be externally fitted, the lower end portion 22d of the vertical column of the building frame cannot be connected to the column member 33. I understand.

図２３は、図２０に示す支柱部材３３を、連結ピンタイプのホゾ材１２を介して、建枠の縦柱の上端部２２ｃの上に連結しようとしたときの連結部分を示す。(a)は正面図であり、(b)は(a)のＣ−Ｃ矢視断面図である。 FIG. 23 shows a connecting portion when the column member 33 shown in FIG. 20 is connected to the upper end portion 22c of the vertical column of the building frame via the connecting pin type hojo material 12. (a) is a front view, (b) is CC sectional view taken on the line of (a).

肉厚が２．４ｍｍで外径が４２．７ｍｍの正円形状の縦柱（内径４０．３ｍｍ）の上端部２２ｃに、連結ピンタイプのホゾ材（両端部の外径３６．４ｍｍ）１２を介して、支柱部材の下端部３３ｂを連結しようとしても、支柱部材の下端部３３ｂの断面の小判形状（内面の長径４０．８５ｍｍ、短径３５ｍｍ）を外嵌することはできない。したがって、縦柱２２の上に支柱部材を連結することができないことが分かる。 A connecting pin type hozo material (outer diameters of 36.4 mm at both ends) 12 is attached to the upper end portion 22c of a vertical column (inner diameter of 40.3 mm) having a wall thickness of 2.4 mm and an outer diameter of 42.7 mm. Therefore, even if it is going to connect the lower end part 33b of a support | pillar member, the oval shape of the cross section of the lower end part 33b of a support | pillar member (the major axis 40.85mm of inner surfaces, and a minor axis 35mm) cannot be externally fitted. Therefore, it can be seen that the column member cannot be connected to the vertical column 22.

本発明によれば、小径化した支柱部材等をホゾ材を介して縦方向に連結して仮設足場を組み立てる際に、他の足場用の支柱部材等との混在使用を確実に防止することができる。 According to the present invention, when a temporary scaffolding is assembled by connecting a column member or the like having a reduced diameter in a vertical direction via a hozo material, it is possible to reliably prevent mixed use with other scaffolding column members and the like. it can.

１支柱
２つなぎ材
２ａクサビ
３支柱部材
３ａ支柱部材の上端部
３ｂ支柱部材の下端部
４コマ
５ジャッキベース
６大引受ジャッキ
７大引材
８根太材
９床付き布枠
１１ホゾ材（埋め込みタイプ）
１２ホゾ材（連結ピンタイプ）
１４建物
２０手摺部材
２１ブレース材
２２縦柱
２２ｃ縦柱の上端部
２２ｄ縦柱の下端部
２３横桟
２４鳥居枠
２５筋違
２８ａロック金具
２８ｂロック金具
３１小径支柱部材用のホゾ材（埋め込みタイプ）
３２小径支柱部材用のホゾ材（連結ピンタイプ）
３３小径の支柱部材
３３ａ小径の支柱部材の上端部
３３ｂ小径の支柱部材の下端部
１００システム支保工
１０１コンクリート構造物（スラブ）
１０２型枠 DESCRIPTION OF SYMBOLS 1 Support | pillar 2 Connecting material 2a Wedge 3 Support member 3a Upper end part of support member 3b Lower end part of support member 4 Top 5 Jack base 6 Large receiving jack 7 Large pulling material 8 joist material 9 Floor frame 11 Hozo material (embedded type)
12 Hozo (connecting pin type)
14 Building 20 Handrail member 21 Brace material 22 Vertical column 22c Upper end of vertical column 22d Lower end of vertical column 23 Horizontal beam 24 Torii frame 25 Streaks 28a Lock bracket 28b Lock bracket 31 Hozo material for small-diameter column member (embedded type)
32 Hozo material for small diameter strut members (connecting pin type)
33 Small-diameter column member 33a Upper end portion of small-diameter column member 33b Lower end portion of small-diameter column member 100 System support 101 Concrete structure (slab)
102 formwork

Claims

少なくとも両端部の断面が長円形状である中空管からなることを特徴とする支柱部材。 A strut member comprising a hollow tube having an oval cross section at least at both ends.

断面が長円形状である短管部材からなることを特徴とするホゾ材。 A tenon material comprising a short tube member having an oval cross section.

断面が長円形状である短管部材であって、その中央部近辺の外径が両端部の外径よりも大きいことを特徴とするホゾ材。 A short tube member having an elliptical cross section, wherein the outer diameter in the vicinity of the center is larger than the outer diameters at both ends.

断面が長円形状である短管部材であって、その中央部近辺の内径が両端部の内径よりも小さいことを特徴とするホゾ材。 A short tube member having an oval cross section, wherein the inner diameter in the vicinity of the center is smaller than the inner diameter of both ends.

少なくとも両端部の断面が長円形状である中空管からなる支柱部材であって、支柱部材の端部に請求項２から４までのいずれかに記載のホゾ材を内嵌または外嵌することによって、このホゾ材を介して連結できることを特徴とする支柱部材。 It is a support | pillar member which consists of a hollow tube whose cross section of at least both ends is an ellipse shape, Comprising: The tenon material in any one of Claim 2 to 4 is fitted inside or externally by the edge part of a support | pillar member A strut member that can be connected via the tenon material.

少なくとも両端部の断面が長円形状である中空管からなる支柱部材であって、支柱部材の片端部に請求項２から４までのいずれかに記載のホゾ材の一部が内嵌または外嵌され他部が突出している状態で接合または取り付けられていることを特徴とする支柱部材。 5. A column member comprising a hollow tube having at least both ends having an oval cross section, wherein a part of the hozo material according to any one of claims 2 to 4 is fitted inside or outside at one end of the column member. A strut member that is fitted or attached in a state of being fitted and the other portion protruding.

請求項１から６までのいずれかに記載の支柱部材またはホゾ材を組み込んだことを特徴とする仮設足場。 A temporary scaffolding comprising the support member or the tenon material according to any one of claims 1 to 6.