JP5097313B2 - Suspended scaffold and its installation method - Google Patents

Suspended scaffold and its installation method Download PDF

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JP5097313B2
JP5097313B2 JP2008217455A JP2008217455A JP5097313B2 JP 5097313 B2 JP5097313 B2 JP 5097313B2 JP 2008217455 A JP2008217455 A JP 2008217455A JP 2008217455 A JP2008217455 A JP 2008217455A JP 5097313 B2 JP5097313 B2 JP 5097313B2
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信夫 杉山
健夫 中井
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株式会社杉孝
東海塗装株式会社
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本発明は、吊り足場及びその架設方法に関するものであり、より詳細には、高架橋、高架道路、高架鉄道等の橋梁に落下防護工として取付けられる吊り足場及びその架設方法に関するものである。   The present invention relates to a suspension scaffold and a construction method thereof, and more particularly to a suspension scaffold attached as a fall protection work to a bridge such as a viaduct, an elevated road, and an elevated railway, and a construction method thereof.
高所作業のための落下防護工として橋梁に取付けられる吊り足場が知られている。この種の吊り足場の架設方法として、地上で一定の床面積の枠組足場を組立てた後、枠組足場をクレーン車等の吊上手段により吊上げて橋脚の所定位置に設置する地組方式の架設方法が、特開平9−273120号公報に開示されている。   A suspension scaffold attached to a bridge is known as a fall protection work for high-altitude work. As a method of constructing this type of suspension scaffolding, a grounding construction method in which a frame scaffolding having a certain floor area is assembled on the ground, and then the framework scaffolding is lifted by a lifting means such as a crane truck and installed at a predetermined position on the pier. Is disclosed in JP-A-9-273120.
また、特公平3−12172号公報には、ホイスト用レールを主桁に取付けた後、地上で地組した小型の分割足場をホイストによって主桁レベルに吊上げて主桁に固定し、同様の作業を繰返して多数の分割足場を縦横に連接し、これにより、広範な吊り足場を橋梁に取付ける地組方式の架設方法が記載されている。   In Japanese Patent Publication No. 3-12172, after attaching a hoist rail to the main girder, a small divided scaffold assembled on the ground is lifted to the main girder level by a hoist and fixed to the main girder. Is repeated, and a large number of divided scaffolds are connected vertically and horizontally, and thereby a ground construction method for mounting a wide range of suspended scaffolds on a bridge is described.
更に、特開2000−54619号公報には、トラス状ビームを用いて比較的広範な面積の吊り足場を地上レベルで地組し、地組後の吊り足場を鋼桁に吊上げるようにした吊り足場の架設方法が記載されている。この吊り足場は、図8に示すように、交通に支障がない橋脚V間の地上作業区域Q(作業用占用帯等)において吊り足場Rを枠組み用台車等の架台S上に予め組立てた後(図8(A))、吊り足場を架台Sによって架設地点まで移動させ(図8(B))、高架橋の鋼桁Tに取付けたウインチ等の揚重機Uによって吊り足場Rを鋼桁Tのレベルまで吊上げ(図8 (C))、しかる後、鋼桁Tに取付ける方式のものである。   Furthermore, Japanese Patent Laid-Open No. 2000-54619 discloses that a suspension scaffold with a relatively wide area is grounded at the ground level using a truss beam, and the suspended scaffolding after the grounding is suspended on a steel girder. The method of building the scaffold is described. As shown in FIG. 8, after the suspension scaffold R is pre-assembled on a platform S such as a framework cart in the ground work area Q (work occupation band, etc.) between the piers V, which does not hinder traffic, as shown in FIG. (Fig. 8 (A)), the suspension scaffold is moved to the installation point by the gantry S (Fig. 8 (B)), and the suspension scaffold R of the steel girder T is moved by a lifting machine U such as a winch attached to the steel beam T of the viaduct. The system is lifted to a level (FIG. 8C) and then attached to a steel girder T.
吊り足場Rと連接する吊り足場R’も又、同様に地上レベルで地組された後、架設地点まで移動され、揚重機によって鋼桁Tのレベルまで吊上げられ(図8 (D))、鋼桁Tに取付けられる。吊り足場R(R’)は、図9に示すように、トラス状ビームR1を平行に配置し、ビームR1上に床板材R2を敷設し、朝顔R3及び補強杆R4等を床の外縁部に組付けた構造を有する。   Similarly, the suspended scaffolding R ′ connected to the suspended scaffolding R is also grounded at the ground level, moved to the construction point, and lifted to the level of the steel beam T by the lifting machine (FIG. 8 (D)). Attached to the girder T. As shown in FIG. 9, the suspended scaffold R (R ′) has a truss beam R1 arranged in parallel, a floor board material R2 laid on the beam R1, and a morning glory R3, a reinforcing rod R4, etc. on the outer edge of the floor. It has an assembled structure.
全高所作業の完了後又は橋梁工事の完了後、吊り足場R、R’は、図8(E)及び図8(F)に示す如く、揚重機Uによって地上レベルに降下され、解体・撤去される。   After completion of all height work or bridge construction, the suspension scaffolds R and R 'are lowered to the ground level by the lifting machine U, disassembled and removed as shown in FIGS. 8 (E) and 8 (F). The
他の形式の吊り足場として、足場パネルをチェーン等の索条によって橋梁の桁材等に直に懸吊するように構成したものが知られている(特許第2647801号公報)。この足場パネルは、縞鋼板等の踏板を枠体に取付けた複合パネル構造のものであり、比較的高い曲げ剛性を有する。
特開平9−273120号公報 特公平3−12172号公報 特開2000−54619号公報 特許第2647801号公報
As another type of suspension scaffold, there is known a structure in which a scaffold panel is suspended directly on a bridge girder or the like by a rope such as a chain (Japanese Patent No. 2647801). This scaffold panel has a composite panel structure in which a step plate such as a striped steel plate is attached to a frame body, and has a relatively high bending rigidity.
JP-A-9-273120 Japanese Patent Publication No. 3-12172 JP 2000-54619 A Japanese Patent No. 2647801
トラス状ビームを用いて比較的広範な面積の足場を地上で予め地組する吊り足場の地組工法(特許文献3(特開2000−54619号公報))によれば、高所で吊り足場を構築する高所作業の作業工数が大幅に減少し、作業全体の安全性が向上するのみならず、揚重作業の作業時間がかなり短縮される。このため、揚重作業の際に交通を遮断する交通規制等の時間を短縮し、交通機関に対する工事の影響を軽減することが可能となる。   According to the construction method of a suspended scaffold (Patent Document 3 (Japanese Patent Laid-Open Publication No. 2000-54619)) in which a scaffold with a relatively wide area is preliminarily constructed on the ground using a truss beam, the suspended scaffold is formed at a high place. The number of man-hours for high-level work to be constructed is greatly reduced, and not only the safety of the whole work is improved, but also the work time of lifting work is considerably shortened. For this reason, it is possible to reduce the time for traffic regulation or the like for blocking traffic during the lifting work, and to reduce the influence of construction on the transportation.
このような地組工法において、上記特許文献4(特許第2647801号公報)に記載された複合パネル構造の足場板を採用し、多数の足場板をトラス状ビームによって支持することも可能である。複合パネル構造の足場パネルは、比較的高い曲げ剛性を有するので、トラス状ビームによる支持間隔(支点間スパン)を拡大し得ることから、トラス状ビームの数量を減少し、地組作業の簡素化、作業工数の減少、工事費の軽減等を図ることが可能となる。   In such a groundwork method, it is possible to employ a composite panel-structured scaffolding plate described in Patent Document 4 (Japanese Patent No. 2647801) and to support a number of scaffolding plates with a truss beam. Scaffolding panels with a composite panel structure have relatively high bending rigidity, so the support interval (span between fulcrums) by the truss beam can be expanded, reducing the number of truss beams and simplifying the assembly work It is possible to reduce the work man-hours and reduce the construction costs.
しかし、このような地組工法の吊り足場においては、トラス状ビーム等の地組用横架材は、トラス状ビームのみを早期に解体・撤去することはできず、横架材を含む吊り足場は、全工事が完了するまで鋼桁の下側に架設され続け、図8(E)及び図8(F)に示す如く、工事完了時に全体的に地上に降下され、解体・撤去される。   However, in such a suspended structure scaffolding method, it is not possible to dismantle and remove the truss-like beam alone, such as a truss-like beam at an early stage. Will continue to be erected under the steel girder until the entire construction is completed, and as shown in FIGS. 8E and 8F, it will be lowered to the ground as a whole, disassembled and removed.
このため、橋梁工事の工事範囲(工区)を拡大する場合や、別の工事範囲(工区)で同様な作業を同時進行させる場合等を考慮し、多数の地組用横架材や、横架材に取付け又は組付けられる多数の補助部材、緊締具等の部材・部品を仮設資材として予め用意する必要が生じる。しかしながら、多数の横架材及びその関連資材の調達・使用は、仮設資材置場の拡大、仮設工事費の増大等の問題を生じさせる。   For this reason, considering the case where the construction range (work zone) of bridge construction is expanded or the case where similar work is carried out simultaneously in another construction range (work zone), a large number of horizontal members for ground structures, It becomes necessary to prepare in advance as a temporary material a large number of auxiliary members, fasteners, and other members and parts that are attached or assembled to the material. However, the procurement and use of a large number of horizontal members and related materials causes problems such as the expansion of the temporary material storage area and the increase in temporary construction costs.
また、このような事情より、別の工事現場等で横架材及びその関連資材が要求される場合であっても、工事完了前には横架材及びその関連資材のみを他の工事現場において転用することはできない。   In addition, even if horizontal materials and related materials are required at other construction sites due to such circumstances, only the horizontal materials and related materials should be used at other construction sites before the completion of construction. It cannot be diverted.
本発明は、このような事情に鑑みてなされたものであり、その目的とするところは、他の工区、工事現場等への地組用横架材及びその関連資材の早期転用を可能にするとともに、地組用横架材及びその関連資材の調達数量の低減、仮設資材置場の縮小、仮設工事費の軽減等を可能にする吊り足場及びその架設方法を提供することにある。   The present invention has been made in view of such circumstances, and the object of the present invention is to enable early diversion of horizontal members for construction and related materials to other construction zones and construction sites. At the same time, it is an object of the present invention to provide a suspension scaffold and its construction method capable of reducing the procurement amount of horizontal members for ground structures and related materials, reducing the temporary material storage area, and reducing temporary construction costs.
上記目的を達成すべく、本発明は、複数の足場板及び横架材を昇降可能に地組してなる吊り足場であって、揚重機に連結された索条によって前記横架材を上昇させることより、全体的に高所作業レベルに上昇され、構築物又は建設物に取付けられる地組工法の吊り足場において、
前記吊り足場を地組し且つ複数の前記横架材によって前記足場板を該横架材の下側に懸架すべく、前記足場板を前記横架材に解放可能に連結するとともに、前記高所作業レベルにおいて前記横架材を撤去すべく前記足場板及び前記横架材の連結を解放する懸吊具(5)と、
前記揚重機による前記索条の上方牽引により前記吊り足場が全体的に前記高所作業レベルに上昇した後、該高所作業レベルで前記構築物又は建設物に前記足場板を懸吊する懸吊手段(8,2g,3g,2c,3c)とをすることを特徴とする吊り足場を提供する。
In order to achieve the above object, the present invention is a suspension scaffold comprising a plurality of scaffolding plates and a horizontal member that can be lifted and lowered, and the horizontal member is raised by a rope connected to a lifting machine. more it is raised to the overall aerial level, in suspension scaffolds land set method which is attached to the construct or the construction thereof,
The scaffolding plate is releasably connected to the horizontal member in order to suspend the scaffolding plate and to suspend the scaffolding plate below the horizontal member by a plurality of the horizontal members . A suspension (5) for releasing the connection between the scaffolding plate and the horizontal member to remove the horizontal member at a work level ;
After rising to totally the aerial level the hanging scaffold by the upper traction of the rope by the crane, suspension means for suspending the scaffolding plate to the construct or construction thereof in the aerial level A suspended scaffold characterized by (8,2g, 3g, 2c, 3c) is provided.
本発明は又、複数の足場板及び横架材によって昇降可能な吊り足場を地組し、揚重機に連結された索条によって前記横架材を上昇させ、該吊り足場を全体的に高所作業レベルで構築物又は建設物に取付ける吊り足場の架設方法において、
前記足場板を前記横架材に解放可能に連結する懸吊具によって該足場板を前記横架材の下側に懸架して地組し、
前記揚重機によって前記索条を上方に牽引して前記吊り足場を全体的に前記高所作業レベルに上昇させ、
前記構築物又は建設物に前記足場板を懸吊し、
前記懸吊具を解放して前記横架材を撤去することを特徴とする吊り足場の架設方法を提供する。
The present invention also lays a suspension scaffold that can be lifted and lowered by a plurality of scaffolding plates and a horizontal member, raises the horizontal member by a rope connected to a lifting machine, and makes the suspension scaffold as a whole high In the construction method of the suspension scaffold attached to the structure or construction at the work level,
The scaffolding plate is suspended below the horizontal member by a suspension that releasably connects the scaffold plate to the horizontal member,
The hoist is pulled up by the hoist to raise the suspension scaffold as a whole to the high work level,
Suspend the scaffolding board to the structure or construction,
A suspension scaffold construction method is provided, wherein the suspension member is released to remove the horizontal member.
本発明の上記構成によれば、横架材は、足場板の上側に位置する逆梁形態のものである。従って、横架材は、高所レベルに上昇した吊り足場の作業床に露出する。しかも、足場板は、上昇後に懸吊手段によって構築物又は建設物に懸吊されるので、足場板の自重及び積載荷重は、構築物又は建設物によって支持される。従って、吊り足場上の作業者は、吊り足場上昇後に早期に横架材及びその関連部材・部品等を解体撤去することができる。   According to the said structure of this invention, a horizontal member is a thing of the reverse beam shape located in the upper side of a scaffold board. Therefore, the horizontal member is exposed to the working floor of the suspension scaffold that has been raised to a high level. Moreover, since the scaffolding plate is suspended from the structure or the construction by the suspension means after being lifted, the weight of the scaffolding plate and the load load are supported by the structure or the construction. Therefore, the worker on the suspension scaffold can dismantle and remove the horizontal member and its related members / parts etc. at an early stage after the suspension scaffold is raised.
従って、上記構成の吊り足場及びその仮設方法によれば、橋梁工事の工事範囲(工区)を拡大する場合や、別の工事範囲(工区)で同様な作業を同時進行させる場合等に、他の工区、工事現場等への地組用横架材及びその関連資材を早期に移動・転用することができる。これは、地組用横架材及びその関連資材の調達数量の低減、仮設資材置場の縮小、仮設工事費の軽減等を図る上で極めて有利である。   Therefore, according to the suspension scaffold of the above configuration and its temporary construction method, when expanding the construction range (work zone) of the bridge construction or when the same work is simultaneously advanced in another construction range (work zone), etc. It is possible to quickly move and divert horizontal members for construction to construction zones, construction sites, and related materials. This is extremely advantageous in reducing the procurement quantity of horizontal members for ground structures and related materials, reducing the temporary material storage area, and reducing temporary construction costs.
本発明の吊り足場及びその架設方法によれば、地組用横架材及びその関連資材を早期に他の工区、工事現場等に転用することが可能となる。また、本発明の吊り足場及びその架設方法によれば、地組用横架材及びその関連資材の調達数量の低減、仮設資材置場の縮小、仮設工事費の軽減等を図ることが可能となる。   According to the suspension scaffold and its erection method of the present invention, it is possible to divert the horizontal member for construction and its related materials to other work areas, construction sites, etc. at an early stage. Moreover, according to the suspension scaffold and its construction method of the present invention, it becomes possible to reduce the procurement amount of the horizontal members for the groundwork and related materials, reduce the temporary material storage area, reduce the temporary construction cost, and the like. .
本発明の好適な実施形態において、上記懸吊具(5)は、上記横架材(4)が貫通可能な開口部(52)を有する枠体(51)と、該枠体によって支承された足場板懸吊部材(56)とを有する。枠体は、横架材に解放可能に固定される。好ましくは、足場板懸吊部材(56)は、足場板の枠部分を挿通し且つ該枠部分を支承する断面を有する。   In a preferred embodiment of the present invention, the suspension (5) is supported by a frame (51) having an opening (52) through which the horizontal member (4) can pass, and the frame. A scaffold plate suspension member (56). The frame is releasably fixed to the horizontal member. Preferably, the scaffolding plate suspension member (56) has a cross section that passes through and supports the frame portion of the scaffolding plate.
本発明の更に好適な実施形態において、上記懸吊手段は、構築物又は建設物に係留される索条(8)と、該索条の下端部を係止可能な足場板の支持部(2g,3g,2c,3c)とから構成される。好ましくは、上記支持部は、足場板の作業床材に形成された開口部(2g,3g)と、該床材の下側に配置され且つ足場板の枠体に連結された受け材(2c,3c)とから構成される。   In a further preferred embodiment of the present invention, the suspension means comprises a rope (8) moored to a structure or a construction, and a scaffolding plate support (2g, which can lock the lower end of the rope). 3g, 2c, 3c). Preferably, the support portion includes an opening (2g, 3g) formed in the working floor of the scaffolding plate, and a receiving member (2c) disposed below the flooring and connected to the frame of the scaffolding plate. 3c).
好ましくは、上記足場板として、連結部(2e,3e)によって相互連結可能な構成を有する複合パネル構造の足場板が使用され、隣接する足場板同士は、一方の足場板の連結用突起と他方の足場板の受入開口との嵌挿等によって相互連結される。更に好ましくは、足場板の布方向は、横架材の方向と平行であり、足場板を相互連結して作業床を補強する補強部材(80,81)が横架材と直交する方向に配置される。   Preferably, as the scaffolding plate, a scaffolding plate having a composite panel structure having a configuration that can be interconnected by the coupling portions (2e, 3e) is used, and adjacent scaffolding plates are connected to the projections for coupling one scaffolding plate and the other. Are connected to each other by, for example, insertion into a receiving opening of the scaffold plate. More preferably, the fabric direction of the scaffold plate is parallel to the direction of the horizontal member, and the reinforcing members (80, 81) for reinforcing the work floor by interconnecting the scaffold plates are arranged in a direction orthogonal to the horizontal member. Is done.
以下、添付図面を参照して、本発明の好適な実施例について詳細に説明する。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
図1及び2は、本発明に従って地組した吊り足場の全体構成を示す平面図、正面図及び側面図である。   FIGS. 1 and 2 are a plan view, a front view, and a side view showing the overall structure of a suspended scaffold assembled according to the present invention.
吊り足場1は、作業床を形成するための多数の足場板2、3と、足場板2、3の上側に水平に配置された複数の横架材4と、足場板2、3を横架材4の下側に懸架するための懸吊具5と、横架材4を揚重機の索条7によって吊上げるための吊り金具6とから主に構成される。   The suspended scaffold 1 is composed of a large number of scaffolding plates 2 and 3 for forming a working floor, a plurality of horizontal members 4 disposed horizontally above the scaffolding plates 2 and 3, and scaffolding plates 2 and 3. It is mainly composed of a suspension tool 5 for suspending the material 4 underneath, and a hanging metal fitting 6 for lifting the horizontal material 4 by a rope 7 of a lifting machine.
図1(B)及び図1(C)に示す如く、足場板2、3は、複合パネル構造を有する足場板である。足場板2、3の枠体は、左右の布枠2a:3aと、両端部の親枠2b:3bと、布枠方向に延びる受け材2c:3cと、親枠2b:3bと平行な補強材2d:3dと、足場板同士を相互連結するための連結部2e:3eとからなる。連結部2e:3eは、隣接する足場板2、3の親枠2b:3bの開口端に嵌挿される。足場板2、3の床材は、枠体に一体的に取付けられた縞鋼板2f:3fからなる。足場板2は、約4mの長さ(布方向の寸法)を有し、足場板3は、約2mの長さ(布方向の寸法)を有する。   As shown in FIG. 1 (B) and FIG. 1 (C), the scaffold plates 2 and 3 are scaffold plates having a composite panel structure. The frame of the scaffolding plates 2 and 3 includes left and right cloth frames 2a: 3a, parent frames 2b: 3b at both ends, receiving members 2c: 3c extending in the cloth frame direction, and reinforcement parallel to the parent frames 2b: 3b. It consists of material 2d: 3d and connection part 2e: 3e for mutually connecting scaffolding boards. The connecting portions 2e: 3e are fitted into the open ends of the parent frames 2b: 3b of the adjacent scaffold plates 2, 3. The flooring of the scaffolding plates 2 and 3 is composed of striped steel plates 2f: 3f that are integrally attached to the frame. The scaffold board 2 has a length of about 4 m (dimension in the cloth direction), and the scaffold board 3 has a length of about 2 m (dimension in the cloth direction).
足場板2、3は縦横に整列配置され、縞鋼板2f:3fは実質的に連続する水平な作業床を吊り足場1に形成する。複数の開口部2g:3gが受け材2c:3cの直上において縞鋼板2f:3fに穿設される。開口部2g:3g及び受け材2c:3cは、後述する索条8(図7)とともに、足場板2、3を橋梁の鋼桁T(図6)に懸吊するための懸吊手段を構成する。   The scaffolding plates 2 and 3 are arranged vertically and horizontally, and the striped steel plates 2f: 3f form a substantially continuous horizontal work floor on the suspended scaffolding 1. A plurality of openings 2g: 3g are formed in the striped steel plates 2f: 3f immediately above the receiving material 2c: 3c. The openings 2g: 3g and the receiving members 2c: 3c constitute suspension means for suspending the scaffolding plates 2, 3 to the bridge steel beam T (FIG. 6) together with the rope 8 (FIG. 7) described later. To do.
図3(A)、図3(B)及び図3(C)は、横架材4の構造を示す平面図、正面図及び底面図であり、図3(D)、図3(E)及び図3(F)は、溝形補強部材42の平面図、正面図及び側面図である。   3 (A), 3 (B) and 3 (C) are a plan view, a front view and a bottom view showing the structure of the horizontal member 4, and FIG. 3 (D), FIG. 3 (E) and FIG. FIG. 3F is a plan view, a front view, and a side view of the groove-shaped reinforcing member 42.
図3(A)、図3(B)及び図3(C)に示すように、各横架材4は、足場板2、3と概ね同等の長さを有する複数の角形鋼管を連結部41において一体的且つ直列に連結した構造を有する。連結部41は、一方の角形鋼管から突出した芯材(図示せず)を他方の角形鋼管の開口端に挿入するソケット式の連結手段と、角形鋼管の連結を補強する溝形補強金具42とから構成される。補強金具42の構造が、図3(D)、図3(E)及び図3(F)に示されている。補強金具42は、隣接する角形鋼管の各端部を下側から受入れて角形鋼管の端部同士を架橋する溝形鋼材43と、角形鋼管及び溝形鋼材43を貫通するボルト・ナット組立体44とから構成される。   As shown in FIGS. 3 (A), 3 (B), and 3 (C), each horizontal member 4 includes a plurality of rectangular steel pipes having substantially the same length as the scaffolding plates 2 and 3, and connecting portions 41. 1 and a structure connected in series. The connecting portion 41 includes a socket-type connecting means for inserting a core member (not shown) protruding from one square steel pipe into the open end of the other square steel pipe, and a groove-shaped reinforcing bracket 42 for reinforcing the connection of the square steel pipe. Consists of The structure of the reinforcing metal fitting 42 is shown in FIGS. 3D, 3E, and 3F. The reinforcing metal fitting 42 includes a grooved steel member 43 that receives the ends of adjacent rectangular steel pipes from below and bridges the ends of the rectangular steel pipes, and a bolt / nut assembly 44 that penetrates the rectangular steel pipes and the grooved steel members 43. It consists of.

図3(A)、図3(B)及び図3(C)に示すように、懸吊具5は、足場板2、3の端部を懸吊するように横架材4の所定位置に配置され、吊り金具6は、吊上げ時の横架材3の水平バランスを考慮した位置(本例では、横架材4の中央部及び両端部)に配置される。
2
As shown in FIGS. 3 (A), 3 (B), and 3 (C), the suspension 5 is placed at a predetermined position on the horizontal member 4 so as to suspend the ends of the scaffolding plates 2 and 3. The hanging metal fittings 6 are arranged at positions (in this example, the center and both ends of the horizontal member 4) in consideration of the horizontal balance of the horizontal member 3 at the time of lifting.
図4(A)、図4(B)及び図4(C)は、懸吊具5の構造を示す正面図、側面図及び底面図である。   4A, 4B, and 4C are a front view, a side view, and a bottom view showing the structure of the suspension tool 5, respectively.
懸吊具5は、横架材4を挿通可能な方形開口部52を形成する枠体51と、枠体51を水平に貫通するボルト・ナット組立体53と、枠体51から垂下する一対のブラケット54と、ブラケット54を貫通するボルト・ナット組立体55と、ボルト・ナット組立体55の軸部に支承される足場板懸吊部材56と、足場板懸吊部材56の脱落を防止する係留部材57とから構成される。   The suspension 5 includes a frame body 51 that forms a rectangular opening 52 through which the horizontal member 4 can be inserted, a bolt / nut assembly 53 that horizontally penetrates the frame body 51, and a pair of suspensions hanging from the frame body 51. Bracket 54, bolt / nut assembly 55 penetrating bracket 54, scaffold plate suspension member 56 supported on the shaft portion of bolt / nut assembly 55, and mooring that prevents dropping of scaffold plate suspension member 56 And a member 57.
足場板懸吊部材56は、足場板2、3の親枠2b、3b(仮想線で示す)を挿通可能なU形断面の金属部材からなる。親枠2b、3bは、円形断面の鋼管からなり、足場板懸吊部材56の下端湾曲部内周面の曲率半径は、親枠2b、3bの半径rと実質的に一致する寸法に設定される。   The scaffold board suspension member 56 is made of a metal member having a U-shaped cross section through which the parent frames 2b and 3b (indicated by phantom lines) of the scaffold boards 2 and 3 can be inserted. The parent frames 2b and 3b are made of a steel pipe having a circular cross section, and the radius of curvature of the inner peripheral surface of the lower end curved portion of the scaffolding plate suspension member 56 is set to a dimension that substantially matches the radius r of the parent frames 2b and 3b. .
懸吊具5は、図2に示す如く、横架材4を開口部52に挿通した状態でボルト・ナット組立体53を締結することにより、横架材4に取付けられる。足場板懸吊部材56に挿通された親枠2b又は親枠3bは、懸吊具5によって横架材4に懸吊される。隣接する親枠2b及び親枠3bは、自在クランプ58によって緊締されるとともに、補強用の単管80が自在クランプ59によって親枠2b又は親枠3bの下側に緊締される。単管80は、横架材4と直交する方向に延びる。なお、隣接する親枠2b、3bも又、自在クランプ31(図1)によって相互に緊締される。   As shown in FIG. 2, the suspension member 5 is attached to the horizontal member 4 by fastening the bolt / nut assembly 53 with the horizontal member 4 inserted through the opening 52. The parent frame 2 b or the parent frame 3 b inserted through the scaffold plate suspension member 56 is suspended from the horizontal member 4 by the suspension tool 5. The adjacent parent frame 2b and the parent frame 3b are tightened by the universal clamp 58, and the reinforcing single tube 80 is tightened to the lower side of the parent frame 2b or the parent frame 3b by the universal clamp 59. The single tube 80 extends in a direction orthogonal to the horizontal member 4. Adjacent parent frames 2b and 3b are also fastened to each other by a universal clamp 31 (FIG. 1).
図1に示す如く、補強用の単管81が足場板2の上側に配置され、単管80と平行に延びる。単管81は、クランプ部材82によって足場板2の受け材2cに緊締される。図2に示す如く、橋梁の外側の縁に近い単管81には、朝顔70のやらずパイプ71がクランプ部材72によって緊締される。朝顔70は、建地パイプ73及び布パイプ74を縦横に組付けた構成のものであり、建地パイプ73の下端部は、クランプ部材によって足場板2の外端部に緊締される。朝顔70の外側面には、養生ネット(図示せず)が張設される。   As shown in FIG. 1, a reinforcing single pipe 81 is disposed on the upper side of the scaffolding plate 2 and extends in parallel with the single pipe 80. The single pipe 81 is fastened to the receiving material 2c of the scaffolding plate 2 by the clamp member 82. As shown in FIG. 2, a pipe 71 is fastened by a clamp member 72 to the single pipe 81 near the outer edge of the bridge without the morning glory 70. The morning glory 70 has a structure in which a building pipe 73 and a cloth pipe 74 are assembled vertically and horizontally, and a lower end portion of the building pipe 73 is fastened to an outer end portion of the scaffolding plate 2 by a clamp member. A curing net (not shown) is stretched on the outer surface of the morning glory 70.
図5(A)、図5(B)及び図5(C)は、吊り金具6の構造を示す正面図、側面図及び横断面図である。   5A, 5B, and 5C are a front view, a side view, and a cross-sectional view showing the structure of the hanging metal fitting 6, respectively.
吊り金具6は、横架材4を挿通可能な開口部62を形成する枠体61と、枠体61を水平に貫通するボルト・ナット組立体63と、枠体61の上面に垂直に立設したブラケット64とから構成される。ブラケット64の中心部には、チェーン、ワイヤ、ロープ等の索条7(図2)を挿通可能な貫通孔65が形成される。   The hanging metal fitting 6 is erected vertically on a frame body 61 that forms an opening 62 through which the horizontal member 4 can be inserted, a bolt / nut assembly 63 that horizontally penetrates the frame body 61, and an upper surface of the frame body 61. Bracket 64. A through-hole 65 through which the rope 7 (FIG. 2) such as a chain, a wire, or a rope can be inserted is formed at the center of the bracket 64.
図2に示す如く、吊り金具6は、横架材4を開口部62に挿通した状態でボルト・ナット組立体63を締結することにより、横架材4に固定される。ブラケット64は、枠体61から垂直上方に突出する。索条7の下端部がブラケット64に係留される。索条7は、橋梁の鋼桁等に配置されたウインチ等の揚重機によって巻き上げられ、矢印で示すように吊り金具6を垂直上方に牽引する。   As shown in FIG. 2, the hanging metal fitting 6 is fixed to the horizontal member 4 by fastening a bolt / nut assembly 63 with the horizontal member 4 inserted through the opening 62. The bracket 64 protrudes vertically upward from the frame body 61. The lower end portion of the rope 7 is moored to the bracket 64. The rope 7 is wound up by a lifting machine such as a winch disposed on a steel girder or the like of a bridge, and pulls the suspension fitting 6 vertically upward as indicated by an arrow.
図6及び図7は、上記構成の吊り足場を橋梁工事の落下防護工として架設する工程を段階的に示す概略正面図である。   6 and 7 are schematic front views showing stepwise the process of erection of the suspension scaffold having the above configuration as a drop protection work for bridge construction.
図6には、橋梁の鋼桁Tに吊り足場1を架設する架設方法が示されている。   FIG. 6 shows a construction method for constructing the suspension scaffold 1 on the steel girder T of the bridge.
吊り足場1は、交通に支障がない橋脚V間の地上作業区域Q(作業用占用帯等)において、枠組み用台車等の架台S上に地組される(図6(A))。地組後の吊り足場1を積載した架台Sは、架設地点まで移動される(図6(B))。ウインチ等の揚重機Uが、高架橋の鋼桁Tに取付けられ、揚重機Uの索条7の下端部が横架材4の吊り金具6に係留される。この状態が図7(A)に示されている。図7(A)に矢印で示す如く、揚重機Uの牽引力が横架材4に作用し、吊り足場1は全体的に上昇する。   The suspension scaffold 1 is laid on a platform S such as a frame carriage in a ground work area Q (work occupation band, etc.) between piers V that does not hinder traffic (FIG. 6A). The gantry S on which the suspended scaffolding 1 after the grounding is loaded is moved to the erection point (FIG. 6B). A lifting machine U such as a winch is attached to the steel bridge T of the viaduct, and the lower end portion of the rope 7 of the lifting machine U is moored to the hanging metal fitting 6 of the horizontal member 4. This state is shown in FIG. As indicated by arrows in FIG. 7A, the traction force of the lifting machine U acts on the horizontal member 4, and the suspension scaffold 1 ascends as a whole.
吊り足場1が鋼桁Tのレベルまで吊上げられると(図6 (C))、図7(B)に示すように、鋼桁Tに係留したチェーン等の索条8が足場板2、3に係止される。索条8の下端部は、足場板2、3の開口部2g:3gを介して受け材2c:3cに係止され又は巻掛けられ、或いは、受け材2c:3cに予め取付けられたリング材等に連結される。揚重機Uの停止及び索条7の張力解放により、吊り足場1の荷重は索条8によって支持される。この時点で足場板2、3の作業床が形成される。作業床上の作業者は、索条7と吊り金具6との連結を解くとともに、懸吊具5を解体して懸吊具5と足場板2、3との連結を解き、これにより、横架材4を解体・撤去することができる。解体・撤去した横架材4は、揚重機U等によって地上に降下される。   When the suspension scaffold 1 is lifted to the level of the steel girder T (FIG. 6 (C)), as shown in FIG. 7 (B), the rope 8 such as a chain moored to the steel girder T is attached to the scaffold plates 2 and 3. Locked. The lower end portion of the rope 8 is locked or wound around the receiving material 2c: 3c through the openings 2g: 3g of the scaffolding plates 2, 3, or is a ring material previously attached to the receiving material 2c: 3c. Etc. The suspension scaffold 1 is supported by the rope 8 by stopping the lifting machine U and releasing the tension of the rope 7. At this time, the working floors of the scaffold plates 2 and 3 are formed. The worker on the work floor uncouples the rope 7 from the hanging bracket 6 and disassembles the suspension 5 to uncouple the suspension 5 from the scaffolding plates 2, 3. The material 4 can be dismantled and removed. The disassembled and removed horizontal member 4 is lowered to the ground by a lifting machine U or the like.
このようにして足場板2、3の作業床が橋梁の片側に架設された後(図6 (D))、同様の作業手順により、反対側の吊り足場1’が吊上げられ(図6(E))、索条8に足場板2、3が係止され、横架材4が解体・撤去され、かくして、鋼桁Tの下側全域に吊り足場1、1’が架設される(図6(F))。   After the work floors of the scaffold plates 2 and 3 are thus constructed on one side of the bridge (FIG. 6D), the opposite suspension scaffold 1 ′ is lifted by the same work procedure (FIG. 6E )), The scaffolding plates 2 and 3 are locked to the rope 8, the horizontal member 4 is disassembled and removed, and thus the suspended scaffolds 1 and 1 'are constructed over the entire lower side of the steel girder T (FIG. 6). (F)).
以上、本発明の好適な実施例について詳細に説明したが、本発明は上記実施例に限定されるものではなく、特許請求の範囲に記載された本発明の範囲内で種々の変形又は変更が可能である。   The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various modifications or changes can be made within the scope of the present invention described in the claims. Is possible.
例えば、上記実施例は、朝顔を有する鋼桁側部の吊り足場の架設に関するものであるが、本発明は、朝顔を有しない中間部の吊り足場についても同様に適用し得るものである。   For example, although the said Example is related with construction of the suspension scaffold of the steel girder side part which has a morning glory, this invention is applicable similarly also to the suspension scaffold of the intermediate part which does not have a morning glory.
また、上記実施例の吊り足場は、角形鋼管又は構造用鋼管からなる横架材を使用したものであるが、トラス状ビーム、H形鋼、C形鋼等を横架材として使用しても良い。   Further, the suspension scaffold of the above embodiment uses a horizontal member made of a square steel pipe or a structural steel pipe, but a truss beam, H-shaped steel, C-shaped steel or the like may be used as a horizontal member. good.
本発明は、高架橋、高架道路、高架鉄道等の橋梁に落下防護工として取付けられる吊り足場及びその架設方法に適用される。本発明の吊り足場及びその架設方法によれば、他の工区、工事現場等への地組用横架材及びその関連資材の早期転用が可能となるとともに、地組用横架材及びその関連資材の調達数量の低減、仮設資材置場の縮小、仮設工事費の軽減等を図ることができるので、その実用的効果は、顕著である。   The present invention is applied to a suspension scaffold attached as a fall protection work to a bridge such as a viaduct, an elevated road, and an elevated railway, and a construction method thereof. According to the suspension scaffold and its erection method of the present invention, it is possible to quickly convert the horizontal member for groundwork and related materials to other work zones, construction sites, etc. Since it is possible to reduce the procurement amount of materials, reduce the temporary material storage area, reduce temporary construction costs, etc., the practical effect is remarkable.
本発明に従って地組した吊り足場の全体構成を示す平面図である。It is a top view which shows the whole structure of the suspension scaffold grounded according to this invention. 図1に示す吊り足場の全体構成を示す正面図及び側面図である。It is the front view and side view which show the whole structure of the suspension scaffold shown in FIG. 図1及び図2に示す横架材及びその溝形補強部材の構造を示す横架材の平面図、正面図及び底面図、溝形補強部材の平面図、正面図及び側面図である。FIG. 3 is a plan view, a front view and a bottom view of the horizontal member showing the structure of the horizontal member shown in FIGS. 1 and 2 and its groove-shaped reinforcing member, and a plan view, a front view and a side view of the groove-shaped reinforcing member. 図1及び図2に示す懸吊具の正面図、側面図及び底面図である。FIG. 3 is a front view, a side view, and a bottom view of the suspension tool shown in FIGS. 1 and 2. 図1及び図2に示す吊り金具の正面図、側面図及び横断面図である。FIG. 3 is a front view, a side view, and a cross-sectional view of the hanging metal fitting shown in FIGS. 1 and 2. 本発明に係る吊り足場を橋梁工事の落下防護工として架設する工程を段階的に示す概略正面図である。It is a schematic front view which shows the process of constructing the suspension scaffold based on this invention as a fall protection work of bridge construction in steps. 本発明に係る吊り足場の架設方法に関し、その主要工程のみを詳細に示す吊り足場の正面図である。It is a front view of the suspension scaffold which shows only the main process in detail regarding the construction method of the suspension scaffold which concerns on this invention. 従来の吊り足場地組工法の工程を段階的に示す概略正面図である。It is a schematic front view which shows the process of the conventional suspension scaffolding method of construction in steps. トラス状ビームを用いた従来の吊り足場の構造を概略的に示す吊り足場の部分斜視図である。It is a fragmentary perspective view of the suspension scaffold which shows roughly the structure of the conventional suspension scaffold using a truss beam.
符号の説明Explanation of symbols
1 吊り足場
2 足場板
3 足場板
4 横架材
5 懸吊具
6 吊り金具
7 索条
8 索条
DESCRIPTION OF SYMBOLS 1 Suspension scaffold 2 Scaffold board 3 Scaffold board 4 Horizontal material 5 Suspension tool 6 Suspension metal fitting 7 Line 8 Line

Claims (8)

  1. 複数の足場板及び横架材を昇降可能に地組してなる吊り足場であって、揚重機に連結された索条によって前記横架材を上昇させることより、全体的に高所作業レベルに上昇され、構築物又は建設物に取付けられる地組工法の吊り足場において、
    前記吊り足場を地組し且つ複数の前記横架材によって前記足場板を該横架材の下側に懸架すべく、前記足場板を前記横架材に解放可能に連結するとともに、前記高所作業レベルにおいて前記横架材を撤去すべく前記足場板及び前記横架材の連結を解放する懸吊具(5)と、
    前記揚重機による前記索条の上方牽引により前記吊り足場が全体的に前記高所作業レベルに上昇した後、該高所作業レベルで前記構築物又は建設物に前記足場板を懸吊する懸吊手段(8,2g,3g,2c,3c)とをすることを特徴とする吊り足場。
    A plurality of scaffolding plate and hanging scaffolds comprising a horizontal member and vertically movable Chigumi, more to increasing the horizontal member by a rope which is connected to the crane, overall aerial level In the suspended scaffolding of the earthwork method that is raised to
    The scaffolding plate is releasably connected to the horizontal member in order to suspend the scaffolding plate and to suspend the scaffolding plate below the horizontal member by a plurality of the horizontal members . A suspension (5) for releasing the connection between the scaffolding plate and the horizontal member to remove the horizontal member at a work level ;
    After rising to totally the aerial level the hanging scaffold by the upper traction of the rope by the crane, suspension means for suspending the scaffolding plate to the construct or construction thereof in the aerial level A suspended scaffold characterized by (8,2g, 3g, 2c, 3c).
  2. 前記懸吊具(5)は、前記横架材(4)が貫通可能な開口部(52)を有する枠体(51)と、該枠体によって支承された足場板懸吊部材(56)とを有し、前記枠体は、前記横架材に解放可能に固定されることを特徴とする請求項1に記載の吊り足場。   The suspension (5) includes a frame (51) having an opening (52) through which the horizontal member (4) can pass, and a scaffold plate suspension member (56) supported by the frame. The suspension scaffold according to claim 1, wherein the frame body is releasably fixed to the horizontal member.
  3. 前記足場板懸吊部材(56)は、前記足場板の枠部分を挿通し且つ該枠部分を支承する断面を有することを特徴とする請求項2に記載の吊り足場。   The suspension scaffold according to claim 2, wherein the scaffold board suspension member (56) has a cross section through which the frame portion of the scaffold plate is inserted and supported.
  4. 前記懸吊手段は、前記構築物又は建設物に係留される索条(8)と、該索条の下端部を係止可能な前記足場板の支持部(2g,3g,2c,3c)とから構成されることを特徴とする請求項1乃至3のいずれか1項に記載の吊り足場。   The suspension means includes a rope (8) moored to the structure or the construction, and a support portion (2g, 3g, 2c, 3c) of the scaffold plate capable of locking the lower end of the rope. The suspension scaffold according to any one of claims 1 to 3, wherein the suspension scaffold is configured.
  5. 前記支持部は、前記足場板の作業床材に形成された開口部(2g,3g)と、該床材の下側に配置され且つ前記足場板の枠体に連結された受け材(2c,3c)とから構成されることを特徴とする請求項4に記載の吊り足場。   The support portion includes openings (2g, 3g) formed in the working floor of the scaffold plate, and receiving members (2c, 3g) disposed below the floor material and connected to the frame of the scaffold plate. The suspension scaffold according to claim 4, wherein the suspension scaffold is composed of 3c).
  6. 複数の足場板及び横架材によって昇降可能な吊り足場を地組し、揚重機に連結された索条によって前記横架材を上昇させ、該吊り足場を全体的に高所作業レベルで構築物又は建設物に取付ける吊り足場の架設方法において、
    前記足場板を前記横架材に解放可能に連結する懸吊具によって該足場板を前記横架材の下側に懸架して地組し、
    前記揚重機によって前記索条を上方に牽引して前記吊り足場を全体的に前記高所作業レベルに上昇させ、
    前記構築物又は建設物に前記足場板を懸吊し、
    前記懸吊具を解放して前記横架材を撤去することを特徴とする吊り足場の架設方法。
    A suspension scaffold that can be moved up and down by a plurality of scaffolding plates and a horizontal member is assembled, and the horizontal member is lifted by a rope connected to a lifting machine, and the suspended scaffold is constructed at a high work level as a whole. In the construction method of the suspension scaffold attached to the construction,
    The scaffolding plate is suspended below the horizontal member by a suspension that releasably connects the scaffold plate to the horizontal member,
    The hoist is pulled up by the hoist to raise the suspension scaffold as a whole to the high work level,
    Suspend the scaffolding board to the structure or construction,
    The suspension scaffold is constructed by releasing the suspension and removing the horizontal member.
  7. 前記足場板として、連結部(2e,3e)によって相互連結可能な構成を有する複合パネル構造の足場板を使用し、前記足場板同士を相互連結することを特徴とする請求項6に記載の架設方法。   The construction according to claim 6, wherein a scaffolding plate having a composite panel structure having a configuration that can be interconnected by a connecting portion (2e, 3e) is used as the scaffolding plate, and the scaffolding plates are interconnected. Method.
  8. 前記足場板の布方向は、前記横架材の方向と平行であり、前記足場板を相互連結して作業床を補強する補強部材(80,81)が前記横架材と直交する方向に配置されることを特徴とする請求項7に記載の架設方法。   The cloth direction of the scaffold plate is parallel to the direction of the horizontal member, and reinforcing members (80, 81) for reinforcing the work floor by interconnecting the scaffold plates are arranged in a direction orthogonal to the horizontal member. 8. The erection method according to claim 7, wherein the erection method is performed.
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CN100540429C (en) * 2004-07-13 2009-09-16 京瓷美达株式会社 Row's paper disc
CN105414815A (en) * 2015-12-15 2016-03-23 南通蓝岛海洋工程有限公司 Movable welding platform used for transverse and longitudinal joints of guiding pipe pile
JP2017048649A (en) * 2015-09-04 2017-03-09 日建リース工業株式会社 Suspended scaffolding, erection method for suspended scaffolding, and hanger
JP6108512B1 (en) * 2016-12-29 2017-04-05 株式会社シーエス技研 Suspension scaffold and installation method
JP2021075967A (en) * 2019-11-13 2021-05-20 ▲蔦▼井株式会社 Suspended scaffolding

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JP6426917B2 (en) * 2014-06-04 2018-11-21 株式会社杉孝 Side wall erection method and equipment for suspension scaffolding
KR101539413B1 (en) * 2014-09-16 2015-07-27 산양환경산업 주식회사 Over bridge disassemble method
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JP2647801B2 (en) * 1994-06-30 1997-08-27 株式会社新成工業 Hanging scaffold panel
JPH11107218A (en) * 1997-10-03 1999-04-20 Arai Gumi Ltd Suspended scaffold and method of assembly construction thereof
JP2000144641A (en) * 1998-11-13 2000-05-26 Kobe Steel Ltd Execution method for combination scaffold and back plate of elevated structure
JP2000303682A (en) * 1999-04-20 2000-10-31 Koyo Kikai Sangyo Kk Suspended scaffold and its constructing method

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CN100540429C (en) * 2004-07-13 2009-09-16 京瓷美达株式会社 Row's paper disc
JP2017048649A (en) * 2015-09-04 2017-03-09 日建リース工業株式会社 Suspended scaffolding, erection method for suspended scaffolding, and hanger
CN105414815A (en) * 2015-12-15 2016-03-23 南通蓝岛海洋工程有限公司 Movable welding platform used for transverse and longitudinal joints of guiding pipe pile
JP6108512B1 (en) * 2016-12-29 2017-04-05 株式会社シーエス技研 Suspension scaffold and installation method
JP2021075967A (en) * 2019-11-13 2021-05-20 ▲蔦▼井株式会社 Suspended scaffolding

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