JP7488735B2

JP7488735B2 - Scaffolding construction method

Info

Publication number: JP7488735B2
Application number: JP2020155421A
Authority: JP
Inventors: 大輔小幡; 考永田; 義久菊地; 章広市川
Original assignee: 日軽エンジニアリング株式会社; 株式会社横河ブリッジ
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2024-05-22
Anticipated expiration: 2040-09-16
Also published as: JP2022049293A; JP2024052828A

Description

特許法第３０条第２項適用日軽エンジニアリング株式会社及び株式会社横河ブリッジが、令和１年１２月１３日～令和２年３月２７日に、小幡大輔、永田考、菊地義久及び市川章広が発明した足場施工方法、足場構造、足場支持材、支持材旋回金具、支持材固定具を用いて首都高速道路湾岸線の改良工事を実施した。Application of Article 30, Paragraph 2 of the Patent Act: Nikkei Engineering Co., Ltd. and Yokogawa Bridge Corporation carried out improvement work on the Shuto Expressway Bayshore Route between December 13, 2019 and March 27, 2020 using the scaffolding construction method, scaffolding structure, scaffolding supports, support swivel fittings, and support fixing devices invented by Obata Daisuke, Nagata Takashi, Kikuchi Yoshihisa, and Ichikawa Akihiro.

本発明は、高速道路橋や鉄道橋などの各種橋梁の点検に用いる足場の施工方法（以下「足場施工方法」という）に関する。 The present invention relates to a construction method for scaffolding used for inspecting various bridges such as expressway bridges and railway bridges (hereinafter referred to as the "scaffolding construction method") .

国内の２ｍ以上の道路橋は約７０万橋にもおよび、建設後５０年以上経過した橋梁は、平成２４年３月時点で１６％、その十年後には４０％に増加し、老朽化による維持管理費の増大や重大事故の発生が懸念されている。こうした状況に鑑み、国や地方自治体では損傷した橋梁を補修する事後保全から、劣化した橋梁を計画的に補修する予防保全へのシフトを推進している。 There are approximately 700,000 road bridges over 2 meters in Japan, of which 16% were built more than 50 years ago as of March 2012, and this figure will increase to 40% ten years later, raising concerns about rising maintenance costs and the occurrence of serious accidents due to deterioration. In light of this situation, the national and local governments are promoting a shift from reactive maintenance, which repairs damaged bridges, to preventive maintenance, which involves systematically repairing deteriorated bridges.

近年の道路構造物の重大事故の発生により、維持管理への取り組みは本格化し、道路法においても「近接目視により、５年に一回の頻度で点検を行うこと」が義務付けられた（以下「目視点検義務化」という）。道路法での目視点検義務化の施行により、道路橋の点検についてもそのニーズが非常に高まっている。 In recent years, serious accidents involving road structures have led to increased efforts at maintenance, and the Road Act now requires that "close visual inspections be carried out once every five years" (hereafter referred to as "mandatory visual inspection"). With the enforcement of the visual inspection mandate under the Road Act, the need for inspections of road bridges has also increased significantly.

このような状況下、本件出願人らは橋梁や高速道路橋等の高架構造物の点検に用いる足場を開発した（特許文献１及び非特許文献１）。この足場は、作業用足場と点検用足場を兼ね、橋梁の近接目視を可能にしたものである。 Under these circumstances, the applicants of the present application have developed a scaffold for use in inspecting elevated structures such as bridges and highway bridges (Patent Document 1 and Non-Patent Document 1). This scaffold serves both as a work scaffold and an inspection scaffold, and allows for close-up visual inspection of the bridge.

この足場は、次の（１）～（７）の工程を繰り返して設置される。
（１）落下防止対策の先行ネット設備を設置する工程
（２）仮吊材を取り付けたパネル受け材を送り出して取り付ける工程
（３）仮吊材を緊張しながらパネル受け材を連結する工程
（４）足場パネルを運搬、敷設、連結しながらパネル受け材に固定する工程
（５）敷設した足場パネルに落下防止ワイヤを設置したのち、既設桁に支持金具を取り付け、その支持金具とパネル受け材を接合する工程
（６）側面パネルを取り付けるための支持材を既設桁に設置したのち、仮吊材を撤去して足場のための吊材を取り付け、側面パネルの枠材を取り付ける工程
（７）側面パネル枠材に側面パネルを設置する工程 This scaffolding is set up by repeating the following steps (1) to (7).
(1) The process of installing an advance net equipment for fall prevention measures. (2) The process of sending out and installing the panel support material with the temporary hanging materials attached. (3) The process of connecting the panel support material while tensioning the temporary hanging materials. (4) The process of transporting, laying, connecting and fixing the scaffolding panel to the panel support material. (5) The process of installing fall prevention wires on the laid scaffolding panel, then attaching support brackets to the existing girders and joining the support brackets to the panel support material. (6) The process of installing support materials for attaching side panels to the existing girders, then removing the temporary hanging materials and installing the hanging materials for the scaffolding, and attaching the frame materials for the side panels. (7) The process of installing the side panels on the side panel frame materials.

特開２０１４－２０５９６１号公報JP 2014-205961 A

日軽エンジニアリング株式会社アルミ合金製常設足場「ｃｕｓａ（登録商標）」紹介ページ（ｈｔｔｐ：//ｗｗｗ.ｓｎｅ.ｃｏ.ｊｐ/ｃｕｓａ/ｉｎｄｅｘ.ｈｔｍｌ）Nikkei Engineering Co., Ltd. Aluminum alloy permanent scaffolding "cusa (registered trademark)" introduction page (http://www.sne.co.jp/cusa/index.html)

しかしながら、従来の施工方法では、パネル受け材を設置する際に、パネル受け材の張り出し先にパネル受け材を支持する支持点を設置することができず、所望位置に足場パネルを設置できない場合があった。 However, with conventional construction methods, when installing the panel support material, it was not possible to install a support point for the panel support material at the end of the protruding part of the panel support material, and there were cases where the scaffolding panel could not be installed in the desired position.

本発明はかかる事情に鑑みてなされたものであり、その解決課題は、パネル受け材の張り出し先に支持点を設置できない場合であっても、所望位置に足場パネルを設置することのできる足場施工方法を提供することにある。 The present invention has been made in consideration of these circumstances, and its problem to be solved is to provide a scaffolding construction method that can install scaffolding panels in desired positions even when it is not possible to install a support point at the protruding end of the panel receiving material.

［足場施工方法］
本発明の足場施工方法は、高速道路橋や鉄道橋などの各種橋梁（以下これらをまとめて「高架構造物」という）の下側に設置される足場の施工方法であって、後続足場支持材を先行足場支持材と平行又は略平行に並べ、先行足場支持材と後続足場支持材を支持材旋回金具で連結し、後続足場支持材を支持材旋回金具の部分から先行足場支持材の先方側に回転させて先行足場支持材と一列にし、一列にした先行足場支持材と後続足場支持材とを連結して足場支持列を形成し、足場支持列を高架構造物の幅方向に間隔をあけて複数列形成し、複数列の足場支持列のうち隣接する足場支持列の後続足場支持材に足場パネルを敷設する方法である。 [Scaffolding construction method]
The scaffolding construction method of the present invention is a construction method for scaffolding to be installed under various bridges such as highway bridges and railway bridges (hereinafter these are collectively referred to as "elevated structures"), in which the trailing scaffolding support is lined up parallel or approximately parallel to the leading scaffolding support, the leading scaffolding support and the trailing scaffolding support are connected with a support material swivel fitting, the trailing scaffolding support is rotated from the support material swivel fitting part toward the leading scaffolding support to line up with the leading scaffolding support, the leading scaffolding support and the trailing scaffolding support arranged in a line are connected to form a scaffolding support row, multiple rows of the scaffolding support rows are formed with gaps in the width direction of the elevated structure, and scaffolding panels are laid on the trailing scaffolding support of adjacent scaffolding support rows among the multiple scaffolding support rows.

［足場構造］
本願における足場構造は、高架構造物の下側に設置される足場の構造であって、支持材固定具と足場支持材と足場パネルを備え、支持材固定具は横桁固定部と縦梁固定部を備え、足場支持材は縦梁と当該縦梁に取り付けられた吊材と当該吊材で吊られたパネル受け材を備え、支持材固定具の横桁固定部が横桁に固定され、支持材固定具の縦梁固定部が縦梁に固定され、吊材で吊られたパネル受け材に足場パネルが敷設された構造である。 [Scaffolding structure]
The scaffolding structure in this application is a scaffolding structure installed under an elevated structure, and comprises a support material fixing device, a scaffolding support, and a scaffolding panel, the support material fixing device has a cross beam fixing portion and a vertical beam fixing portion, the scaffolding support comprises a vertical beam, a hanging member attached to the vertical beam, and a panel support member suspended by the hanging member, the cross beam fixing portion of the support material fixing device is fixed to the cross beam, the vertical beam fixing portion of the support material fixing device is fixed to the vertical beam, and a scaffolding panel is laid on the panel support member suspended by the hanging member.

［足場支持材］
本願における足場支持材は、高架構造物の下側に設置される足場の足場パネルを支持する足場支持材であって、縦梁と当該縦梁に取り付けられた吊材と当該吊材に吊り下げられたパネル受け材を備え、パネル受け材は吊材を介して縦梁に連結されたものである。 [Scaffolding support material]
The scaffolding support material in this application is a scaffolding support material that supports scaffolding panels of a scaffold installed on the underside of an elevated structure, and comprises a vertical beam, a hanging member attached to the vertical beam, and a panel support material suspended from the hanging member, with the panel support material being connected to the vertical beam via the hanging member.

［支持材旋回金具］
本願における支持材旋回金具は、前記足場支持材を旋回させる支持材旋回金具であって、足場支持材の縦梁の上面に固定される上固定部と、当該縦梁の下面に固定される下固定部と、当該上固定部と下固定部とを連結する連結ピンと、連結ピンの外周に被さる鞘管を備えている。上固定部は、連結される一方の縦梁に固定される上部第一プレートと、連結される他方の縦梁に固定される上部第二プレートを備え、下固定部は、連結される一方の縦梁に固定される下部第一プレートと、連結される他方の縦梁に固定される下部第二プレートを備えている。上部第一プレート、上部第二プレート、下部第一プレート及び下部第二プレートに連結ピンを挿通可能な挿通孔が設けられ、鞘管はその内部に連結ピンを挿通可能な鞘管通孔を備えている。上固定部、下固定部及び鞘管は、挿通孔と鞘管通孔に挿通された連結ピンによって軸支されている。 [Support material swivel bracket]
The support swivel fitting in the present application is a support swivel fitting for rotating the scaffolding support, and includes an upper fixing part fixed to the upper surface of a vertical beam of the scaffolding support, a lower fixing part fixed to the lower surface of the vertical beam, a connecting pin connecting the upper fixing part and the lower fixing part, and a sheath tube covering the outer periphery of the connecting pin. The upper fixing part includes an upper first plate fixed to one of the vertical beams to be connected and an upper second plate fixed to the other vertical beam to be connected, and the lower fixing part includes a lower first plate fixed to one of the vertical beams to be connected and a lower second plate fixed to the other vertical beam to be connected. The upper first plate, the upper second plate, the lower first plate, and the lower second plate are provided with insertion holes through which the connecting pin can be inserted, and the sheath tube has a sheath tube through hole inside which the connecting pin can be inserted. The upper fixing part, the lower fixing part, and the sheath tube are pivotally supported by the connecting pin inserted through the insertion hole and the sheath tube through hole.

［支持材固定具］
本願における支持材固定具は、前記足場支持材を高架構造物の横桁に固定する支持材固定具であって、足場支持材の縦梁に固定される縦梁固定部と横桁に固定される横桁固定部を備えている。縦梁固定部は縦梁の上面に宛がわれる鋼製の縦梁宛がい部を備え、横桁固定部は横桁のウェブに宛がわれる鋼製の横桁宛がい部を備えている。縦梁宛がい部を縦梁に固定し、横桁宛がい部を横桁に固定することによって、足場支持材を横桁に固定することができる。 [Support material fixing device]
The support material fixing device in this application is a support material fixing device that fixes the scaffolding support material to a cross beam of an elevated structure, and includes a vertical beam fixing part fixed to the vertical beam of the scaffolding support material and a cross beam fixing part fixed to the cross beam. The vertical beam fixing part includes a steel vertical beam addressing part that is applied to the upper surface of the vertical beam, and the cross beam fixing part includes a steel cross beam addressing part that is applied to the web of the cross beam. By fixing the vertical beam addressing part to the vertical beam and fixing the cross beam addressing part to the cross beam, the scaffolding support material can be fixed to the cross beam.

本発明は、先に設置された先行足場支持材と後続足場支持材とを支持材旋回金具で連結して施工する方法であるため、パネル受け材の張り出し先に支持点を設置できない場合であっても、所望位置に足場パネルを設置することができる。 The present invention is a construction method that connects a leading scaffolding support that has already been installed with a trailing scaffolding support using a support rotation bracket, so even if it is not possible to install a support point at the protruding end of the panel support material, it is possible to install the scaffolding panel in the desired position.

本願における足場支持材の一例を示す斜視図。FIG. 1 is a perspective view showing an example of a scaffolding support material according to the present application . （ａ）は図１に示す足場支持材の端面説明図、（ｂ）は（ａ）のIIｂ部詳細図、（ｃ）は足場支持材に足場パネルをした状態の説明図。2A is an explanatory diagram of the end face of the scaffolding support material shown in FIG. 1, FIG. 2B is a detailed diagram of part IIb of FIG. 2A, and FIG. 2C is an explanatory diagram of the state in which a scaffolding panel is attached to the scaffolding support material. （ａ）～（ｃ）は本願における足場支持材のパネル受け材を引上げ位置から直下位置に移動させる手順の説明図。4A to 4C are explanatory diagrams of the procedure for moving the panel support material of the scaffolding support material in the present application from a raised position to a directly below position. （ａ）は右回り用の支持材旋回金具の一例を示すもの、（ｂ）は左回り用の支持材旋回金具の一例を示すもの。1A shows an example of a support swivel fitting for clockwise rotation, and FIG. 1B shows an example of a support swivel fitting for counterclockwise rotation. （ａ）は図４（ａ）に示す支持材旋回金具の正面図、（ｂ）は（ａ）の左側面図、（ｃ）は（ａ）の平面図、（ｄ）は（ａ）の底面図。4(a) is a front view of the support material swivel fitting shown in FIG. 4(a), (b) is a left side view of (a), (c) is a plan view of (a), and (d) is a bottom view of (a). （ａ）は図４（ａ）に示す支持旋回金具の取り付け状態説明図、（ｂ）は（ａ）のVI部拡大図。5A is an explanatory diagram of the installation state of the support swivel fitting shown in FIG. 4A, and FIG. 5B is an enlarged view of part VI in FIG. （ａ）は図４（ｂ）に示す支持材旋回金具の正面図、（ｂ）は（ａ）の左側面図、（ｃ）は（ａ）の平面図、（ｄ）は（ａ）の底面図。4(a) is a front view of the support material swivel fitting shown in FIG. 4(b), (b) is a left side view of (a), (c) is a plan view of (a), and (d) is a bottom view of (a). （ａ）は図４（ｂ）に示す支持旋回金具の取り付け状態説明図、（ｂ）は（ａ）のVIII部拡大図。8A is an explanatory diagram of the mounting state of the support swivel fitting shown in FIG. 4B, and FIG. 8B is an enlarged view of part VIII in FIG. （ａ）は支持材固定具の一例を示す斜視図、（ｂ）は（ａ）の支持材固定具の使用状態説明図。FIG. 4A is a perspective view showing an example of a support material fixing device, and FIG. 4B is an explanatory diagram of the support material fixing device of FIG. 4A in use. （ａ）は先行ネット設備を設置する工程の側面説明図、（ｂ）は（ａ）の平面説明図。1A is a side view illustrating the process of installing the advance network equipment, and FIG. 1B is a plan view illustrating FIG. （ａ）は後続足場支持材を設置する工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of installing the subsequent scaffolding support material, and (b) is a plan view illustrating (a). （ａ）は先行ネット設備を送り出す工程の側面説明図、（ｂ）は（ａ）の平面説明図。1A is a side view of the process of sending out the preceding net equipment, and FIG. 1B is a plan view of FIG. （ａ）は三本の足場支持材を旋回させる工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of rotating three scaffolding supports, and (b) is a plan view illustrating (a). （ａ）は三本の足場支持材をさらに旋回させる工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of further rotating the three scaffolding supports, and (b) is a plan view illustrating (a). （ａ）は残りの足場支持材を旋回させる工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of rotating the remaining scaffolding support material, and (b) is a plan view illustrating (a). （ａ）は一列に並べた後続足場支持材と先行足場支持材を連結する工程の側面説明図、（ｂ）は（ａ）の平面説明図。1A is a side view illustrating the process of connecting a trailing scaffolding support material and a leading scaffolding support material arranged in a line, and FIG. 1B is a plan view illustrating FIG. （ａ）は足場パネルを敷設する工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of laying scaffolding panels, and (b) is a plan view illustrating (a). （ａ）は後続足場支持材を設置する工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of installing the subsequent scaffolding support material, and (b) is a plan view illustrating (a). （ａ）は先行ネット設備を送り出す工程の側面説明図、（ｂ）は（ａ）の平面説明図。1A is a side view of the process of sending out the preceding net equipment, and FIG. 1B is a plan view of FIG. （ａ）は三本の足場支持材を旋回させる工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of rotating three scaffolding supports, and (b) is a plan view illustrating (a). （ａ）は残りの足場支持材を旋回させる工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of rotating the remaining scaffolding support material, and (b) is a plan view illustrating (a). （ａ）は一列に並べた後続足場支持材と先行足場支持材を連結する工程の側面説明図、（ｂ）は（ａ）の平面説明図。1A is a side view illustrating the process of connecting a trailing scaffolding support material and a leading scaffolding support material arranged in a line, and FIG. 1B is a plan view illustrating FIG. （ａ）は足場パネルを敷設する工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of laying scaffolding panels, and (b) is a plan view illustrating (a). （ａ）は後続足場支持材を設置する工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of installing the subsequent scaffolding support material, and (b) is a plan view illustrating (a). （ａ）は先行ネット設備を送り出す工程の側面説明図、（ｂ）は（ａ）の平面説明図。1A is a side view of the process of sending out the preceding net equipment, and FIG. 1B is a plan view of FIG. （ａ）は三本の足場支持材を旋回させる工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of rotating three scaffolding supports, and (b) is a plan view illustrating (a). （ａ）は残りの足場支持材を旋回させる工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of rotating the remaining scaffolding support material, and (b) is a plan view illustrating (a). （ａ）は一列に並べた後続足場支持材と先行足場支持材を連結する工程の側面説明図、（ｂ）は（ａ）の平面説明図。1A is a side view illustrating the process of connecting a trailing scaffolding support material and a leading scaffolding support material arranged in a line, and FIG. 1B is a plan view illustrating FIG. （ａ）は足場パネルを敷設する工程の側面説明図、（ｂ）は（ａ）の平面説明図。(a) is a side view illustrating the process of laying scaffolding panels, and (b) is a plan view illustrating (a). （ａ）は後続足場支持材の縦梁を支持材固定具で横桁に固定する工程の側面説明図、（ｂ）は（ａ）の平面説明図。1A is a side view illustrating the process of fixing the vertical beam of the trailing scaffolding support to the cross beam with a support fixing device, and FIG. 1B is a plan view illustrating FIG.

（実施形態）
本発明の実施形態の一例を、図面を参照して説明する。説明の便宜上、はじめに本願における足場支持材１０、支持材旋回金具２０及び支持材固定具３０並びに先行ネット設備４０の一例について説明し、その後に、本発明の足場施工方法及び本願における足場構造の一例について説明する。 (Embodiment)
An example of an embodiment of the present invention will be described with reference to the drawings. For convenience of explanation, an example of a scaffolding support 10, a support swivel fitting 20, a support fixing device 30, and a preceding net equipment 40 in the present application will be described first, and then an example of a scaffolding construction method of the present invention and a scaffolding structure in the present application will be described.

［足場支持材］
本願における足場支持材の実施形態の一例を、図面を参照して説明する。本願における足場支持材１０は、高架構造物（この実施形態では橋梁）の点検に用いる足場の足場パネルＡを支持する部材である。一例として図１及び図２（ａ）～（ｃ）に示す足場支持材１０は、縦梁１１と、縦梁１１に取り付けられた吊材１２と、吊材１２で吊られたパネル受け材１３を備えている。 [Scaffolding support material]
An example of an embodiment of a scaffolding support in the present application will be described with reference to the drawings. The scaffolding support 10 in the present application is a member that supports a scaffolding panel A of a scaffold used for inspecting an elevated structure (a bridge in this embodiment). As an example, the scaffolding support 10 shown in Figures 1 and 2 (a) to (c) includes a vertical beam 11, a hanging member 12 attached to the vertical beam 11, and a panel support member 13 hung by the hanging member 12.

前記縦梁１１はパネル受け材１３を支持する部材である。この実施形態では、縦梁１１としてＩ型鋼を用いている。縦梁１１の下フランジの底面側には端面視Ｔ字状の取付け材１１ａが突設され、当該取付け材１１ａに吊材１２が取り付けられている。 The vertical beam 11 is a member that supports the panel support material 13. In this embodiment, an I-beam is used as the vertical beam 11. A mounting member 11a that is T-shaped in end view protrudes from the bottom side of the lower flange of the vertical beam 11, and a hanging member 12 is attached to the mounting member 11a.

前記吊材１２は縦梁１１とパネル受け材１３を連結する部材である。図１に示す吊材１２は、取付け材１１ａの両外側に配置される平板材１２ａ、１２ｂを備えている。両平板材１２ａ、１２ｂは複数のボルト１２ｃを締結することで連結されている。 The hanging member 12 is a member that connects the vertical beam 11 and the panel support member 13. The hanging member 12 shown in FIG. 1 has flat plate members 12a and 12b that are arranged on both outside sides of the mounting member 11a. The flat plate members 12a and 12b are connected by fastening a number of bolts 12c.

前記パネル受け材１３は、隣接する他のパネル受け材１３と協働して足場パネルＡを支持する部材である。パネル受け材１３には、たとえば、アルミ材などを用いることができる。この実施形態のパネル受け材１３は、足場パネルＡを支持する受け部１３ａと、受け部１３ａの幅方向中央付近から上向きに立ち上がった立ち上がり部１３ｂを備えている。立ち上がり部１３ｂの両面には、足場パネルＡの上面を抑える押さえ具１４が当接する突条１３ｃ、１３ｄが上下に間隔をあけて二条突設されている。 The panel support material 13 is a member that supports the scaffolding panel A in cooperation with other adjacent panel support materials 13. The panel support material 13 can be made of aluminum, for example. The panel support material 13 in this embodiment has a support portion 13a that supports the scaffolding panel A, and a rising portion 13b that rises upward from near the center of the width of the support portion 13a. Two protrusions 13c, 13d are provided at intervals above and below on both sides of the rising portion 13b, against which a clamp 14 that holds down the upper surface of the scaffolding panel A abuts.

この実施形態の足場支持材１０は、吊材１２によってパネル受け材１３が斜め上方に引き上げられた状態（図３（ａ））で吊材１２の所定のボルト１２ｃを緩めることで、引き上げられたパネル受け材１３を縦梁１１の直下（吊材１２が上下方向に縦向きになり、縦梁１１とパネル受け材１３の両端の位置が揃う位置）に移動することができる（図３（ｂ））。縦梁１１の直下に移動したパネル受け材１３は吊材１２の所定のボルト１２ｃを締結することで、当該位置に固定することができる（図３（ｃ））。 In this embodiment of the scaffolding support 10, when the panel support 13 is pulled up diagonally upward by the hanging member 12 (FIG. 3(a)), the predetermined bolt 12c of the hanging member 12 can be loosened to move the pulled panel support 13 directly below the vertical beam 11 (a position where the hanging member 12 is oriented vertically in the up-down direction and both ends of the vertical beam 11 and the panel support 13 are aligned) (FIG. 3(b)). The panel support 13 that has been moved directly below the vertical beam 11 can be fixed in place by tightening the predetermined bolt 12c of the hanging member 12 (FIG. 3(c)).

ここで説明した実施形態は一例であり、本願における足場支持材は、その要旨を変更しない範囲で適宜変更、追加、省略等することができる。 The embodiment described here is merely an example, and the scaffolding support material in this application can be modified, added to, omitted, etc. as appropriate without departing from the spirit and scope of the present invention.

［支持材旋回金具］
本願における支持材旋回金具２０の実施形態の一例を、図面を参照して説明する。本願における支持材旋回金具２０は、足場の施工に際し、足場支持材１０を旋回させるための部材である。一例として図４（ａ）、図５（ａ）（ｂ）及び図６（ａ）（ｂ）に示す支持材旋回金具２０は、足場支持材１０を右回転（右旋回）させる右回り用のもの、図４（ｂ）、図７（ａ）（ｂ）及び図８（ａ）（ｂ）に示す支持材旋回金具２０は、足場支持材１０を左回転（左旋回）させる左回り用のものである。 [Support material swivel bracket]
An example of an embodiment of the support swivel fitting 20 in the present application will be described with reference to the drawings. The support swivel fitting 20 in the present application is a member for rotating the scaffolding support 10 when constructing the scaffolding. As an example, the support swivel fittings 20 shown in Fig. 4(a), Fig. 5(a)(b), and Fig. 6(a)(b) are for right-handed rotation, which rotates the scaffolding support 10 to the right (right-handed rotation), and the support swivel fittings 20 shown in Fig. 4(b), Fig. 7(a)(b), and Fig. 8(a)(b) are for left-handed rotation, which rotates the scaffolding support 10 to the left (left-handed rotation).

図４（ａ）、図５（ａ）（ｂ）及び図６（ａ）（ｂ）に示す支持材旋回金具２０は、縦梁１１の上面に固定される上固定部２１と、縦梁１１の下面に固定される下固定部２２と、上固定部２１と下固定部２２をつなぐ連結ピン２３と、鞘管２４を備えている。 The support swivel bracket 20 shown in Figures 4(a), 5(a)(b), and 6(a)(b) includes an upper fixing part 21 fixed to the upper surface of the vertical beam 11, a lower fixing part 22 fixed to the lower surface of the vertical beam 11, a connecting pin 23 connecting the upper fixing part 21 and the lower fixing part 22, and a sheath tube 24.

前記上固定部２１は二枚のプレートを備えている。一方のプレート（以下「上部第一プレート」という）２１ａは長方形状の板材であり、一つのコーナーに山形状の突き出し部（以下「上部第一突き出し部」という）２１ｂが設けられている。上部第一突き出し部２１ｂには連結ピン２３を挿通する挿通孔（以下「上部第一挿通孔」という）２１ｃが設けられている。 The upper fixing part 21 comprises two plates. One plate (hereinafter referred to as the "upper first plate") 21a is a rectangular plate material with a mountain-shaped protrusion (hereinafter referred to as the "upper first protrusion") 21b at one corner. The upper first protrusion 21b has an insertion hole (hereinafter referred to as the "upper first insertion hole") 21c through which the connecting pin 23 is inserted.

上部第一プレート２１ａの上面には上向きに突設された長板材（以下「上部第一長板材」という）２１ｄが上部第一プレート２１ａの長手方向に沿って設けられ、下面には下向きに突出する楕円状のブロック（以下「上部第一プレートブロック」という）２１ｅが上部第一プレート２１ａの長手方向に間隔をあけて設けられている。上部第一プレート２１ａ及び上部第一プレートブロック２１ｅには、縦梁１１への固定に用いるボルトを挿通するための挿通孔（以下「上部第一ボルト孔」という）２１ｆが設けられている。 On the upper surface of the upper first plate 21a, a long plate material (hereinafter referred to as the "upper first long plate material") 21d is provided along the longitudinal direction of the upper first plate 21a, and on the lower surface, downwardly protruding elliptical blocks (hereinafter referred to as the "upper first plate blocks") 21e are provided at intervals along the longitudinal direction of the upper first plate 21a. The upper first plate 21a and the upper first plate blocks 21e are provided with insertion holes (hereinafter referred to as the "upper first bolt holes") 21f for inserting bolts used for fixing to the vertical beam 11.

上固定部２１の他方のプレート（以下「上部第二プレート」という）２１ｇは、上部第一プレート２１ａと同様の長方形状の板材であり、一つのコーナーに山形状の突き出し部（以下「上部第二突き出し部」という）２１ｈが設けられている。上部第二突き出し部２１ｈには連結ピン２３を挿通する挿通孔（以下「上部第二挿通孔」という）２１ｉが設けられている。 The other plate (hereinafter referred to as the "upper second plate") 21g of the upper fixing part 21 is a rectangular plate material similar to the upper first plate 21a, and has a mountain-shaped protruding part (hereinafter referred to as the "upper second protruding part") 21h at one corner. The upper second protruding part 21h has an insertion hole (hereinafter referred to as the "upper second insertion hole") 21i through which the connecting pin 23 is inserted.

上部第二プレート２１ｇの上面には上向きに立設された長板材（以下「上部第二長板材」という）２１ｊが上部第二プレート２１ｇの長手方向に沿って設けられている。上部第二プレート２１ｇには、縦梁１１への固定に用いるボルトを挿通するための挿通孔（以下「上部第二ボルト孔」という）２１ｋが設けられている。 A long plate material (hereinafter referred to as the "upper second long plate material") 21j is provided on the upper surface of the upper second plate 21g along the longitudinal direction of the upper second plate 21g. The upper second plate 21g is provided with an insertion hole (hereinafter referred to as the "upper second bolt hole") 21k for inserting a bolt used for fixing to the vertical beam 11.

前記下固定部２２は二枚のプレートを備えている。一方のプレート（以下「下部第一プレート」という）２２ａは長方形状の板材であり、一つのコーナーに山形状の突き出し部（以下「下部第一突き出し部」という）２２ｂが設けられている。下部第一突き出し部２２ｂには連結ピン２３を挿通する挿通孔（以下「下部第一挿通孔」という）２２ｃが設けられている。 The lower fixing part 22 comprises two plates. One plate (hereinafter referred to as the "lower first plate") 22a is a rectangular plate material with a mountain-shaped protrusion (hereinafter referred to as the "lower first protrusion") 22b at one corner. The lower first protrusion 22b has an insertion hole (hereinafter referred to as the "lower first insertion hole") 22c through which the connecting pin 23 is inserted.

下部第一プレート２２ａの下面には下向きに突設された長板材（以下「下部第一長板材」という）２２ｄがプレートの長手方向に沿って設けられている。下部第一プレート２２ａには、縦梁１１への固定に用いるボルトを挿通するための挿通孔（以下「下部第一ボルト孔」という）２２ｋが設けられている。 A long plate member (hereinafter referred to as the "lower first long plate member") 22d is provided on the underside of the lower first plate 22a along the longitudinal direction of the plate, protruding downward. The lower first plate 22a is provided with an insertion hole (hereinafter referred to as the "lower first bolt hole") 22k for inserting a bolt used for fixing to the vertical beam 11.

下固定部２２の他方のプレート（以下「下部第二プレート」という）２２ｇは、下部第一プレート２２ａと同様の長方形状の板材であり、一つのコーナーに山形状の突き出し部（以下「下部第二突き出し部」という）２２ｈが設けられている。下部第二突き出し部２２ｈには連結ピン２３を挿通する挿通孔（以下「下部第二挿通孔」という）２２ｉが設けられている。 The other plate (hereinafter referred to as the "lower second plate") 22g of the lower fixing part 22 is a rectangular plate material similar to the lower first plate 22a, and has a mountain-shaped protruding part (hereinafter referred to as the "lower second protruding part") 22h at one corner. The lower second protruding part 22h has an insertion hole (hereinafter referred to as the "lower second insertion hole") 22i through which the connecting pin 23 is inserted.

下部第二プレート２２ｇの上面には下向きに突設された長板材（以下「下部第二長板材」という）２２ｊが下部第二プレート２２ｇの長手方向に沿って設けられ、上面には上向きに突出する楕円状のブロック（以下「下部第二プレートブロック」という）２２ｅが下部第二プレート２２ｇの長手方向に間隔をあけて設けられている。下部第二プレート２２ｇ及び下部第二プレートブロック２２ｅには、縦梁１１への固定に用いるボルトを挿通するための挿通孔（以下「下部第二ボルト孔」という）２２ｆが設けられている。 A downwardly protruding long plate (hereinafter referred to as the "lower second long plate") 22j is provided on the upper surface of the lower second plate 22g along the longitudinal direction of the lower second plate 22g, and upwardly protruding elliptical blocks (hereinafter referred to as the "lower second plate blocks") 22e are provided on the upper surface at intervals along the longitudinal direction of the lower second plate 22g. The lower second plate 22g and the lower second plate blocks 22e are provided with insertion holes (hereinafter referred to as the "lower second bolt holes") 22f for inserting bolts used for fixing to the vertical beam 11.

上部第一プレート２１ａは上部第一挿通孔２１ｃが上部第二挿通孔２１ｉと連通するように上部第二プレート２１ｇの上側に重ねられ、下部第一プレート２２ａは下部第一挿通孔２２ｃが下部第二挿通孔２２ｉと連通するように下部第二プレート２２ｇの上側に重ねられている。上部第一挿通孔２１ｃ、上部第二挿通孔２１ｉ、鞘管通孔２４ａ、下部第一挿通孔２２ｃ及び下部第二挿通孔２２ｉには連結ピン２３が差し込まれ、連結ピン２３の下部第二挿通孔２２ｉの下側に突出した部分にナット２３ａが締結されている。 The upper first plate 21a is placed on the upper side of the upper second plate 21g so that the upper first through hole 21c communicates with the upper second through hole 21i, and the lower first plate 22a is placed on the upper side of the lower second plate 22g so that the lower first through hole 22c communicates with the lower second through hole 22i. A connecting pin 23 is inserted into the upper first through hole 21c, the upper second through hole 21i, the sheath tube through hole 24a, the lower first through hole 22c, and the lower second through hole 22i, and a nut 23a is fastened to the portion of the connecting pin 23 that protrudes below the lower second through hole 22i.

なお、図４（ｂ）、図７（ａ）（ｂ）及び図８（ａ）（ｂ）に示す左回り用の支持材旋回金具２０は、各プレートにおける突き出し部２１ｂ、２１ｈ、２２ｂ、２２ｈの位置が異なる以外は、図４（ａ）、図５（ａ）（ｂ）及び図６（ａ）（ｂ）に示す右回り用の支持材旋回金具２０と同様の構成である。繰り返しの説明を避けるため、右回り用の支持材旋回金具２０と同じ構成については同じ符号を付し、その説明を省略する。 The left-handed support swivel fitting 20 shown in Fig. 4(b), Fig. 7(a)(b), and Fig. 8(a)(b) has the same configuration as the right-handed support swivel fitting 20 shown in Fig. 4(a), Fig. 5(a)(b), and Fig. 6(a)(b), except that the positions of the protrusions 21b, 21h, 22b, and 22h on each plate are different. To avoid repetitive explanations, the same reference numerals are used for the same configuration as the right-handed support swivel fitting 20, and the explanations thereof will be omitted.

［支持材固定具］
本願における支持材固定具３０の実施形態の一例を、図面を参照して説明する。本願における支持材固定具３０は、足場支持材１０を横桁Ｂに固定する際に用いる部材である。一例として図９（ａ）（ｂ）に示す支持材固定具３０は、縦梁１１に固定される縦梁固定部３１と横桁Ｂに固定される横桁固定部３２を備えている。 [Support material fixing device]
An example of an embodiment of the support material fixing device 30 in the present application will be described with reference to the drawings. The support material fixing device 30 in the present application is a member used when fixing the scaffolding support 10 to a cross beam B. As an example, the support material fixing device 30 shown in Figures 9(a) and (b) includes a vertical beam fixing portion 31 fixed to the vertical beam 11 and a cross beam fixing portion 32 fixed to the cross beam B.

前記縦梁固定部３１は、縦梁１１の上面に宛がわれる縦梁宛がい部３１ａと、縦梁宛がい部３１ａの上面に立設された立設部３１ｂと、縦梁宛がい部３１ａと立設部３１ｂの間に設けられた支持部３１ｃを備えている。立設部３１ｂの内側の面には縦長の縦つなぎ材３１ｄが連結されている。縦つなぎ材３１ｄはボルトとナットで立設部３１ｂに連結されている。縦つなぎ材３１ｄは立設部３１ｂの上端よりも上側に突出するようにしてある。この実施形態では、縦梁宛がい部３１ａ、立設部３１ｂ及び支持部３１ｃとして平鋼を、縦つなぎ材３１ｄとしてアングル鋼を用いている。縦梁固定部３１は平鋼やアングル鋼以外のものを用いて構成することもできる。 The vertical beam fixing part 31 includes a vertical beam fitting part 31a that is fitted to the upper surface of the vertical beam 11, a standing part 31b that is erected on the upper surface of the vertical beam fitting part 31a, and a support part 31c that is provided between the vertical beam fitting part 31a and the standing part 31b. A vertically long vertical tie member 31d is connected to the inner surface of the standing part 31b. The vertical tie member 31d is connected to the standing part 31b with a bolt and a nut. The vertical tie member 31d is designed to protrude above the upper end of the standing part 31b. In this embodiment, flat steel is used for the vertical beam fitting part 31a, the standing part 31b, and the support part 31c, and angle steel is used for the vertical tie member 31d. The vertical beam fixing part 31 can also be constructed using materials other than flat steel and angle steel.

前記縦つなぎ材３１ｄの上部であって立設部３１ｂよりも高い位置には、横桁固定部３２が設けられている。図９（ａ）に示すように、横桁固定部３２は、横桁Ｂに宛がわれる横桁宛がい部３２ａと、横桁宛がい部３２ａと縦つなぎ材３１ｄとを連結する横連結材３２ｂを備えている。縦つなぎ材３１ｄ及び横桁宛がい部３２ａはボルトとナットで横連結材３２ｂに連結されている。この実施形態では、横桁宛がい部３２ａとしてアングル鋼を、横連結材３２ｂとしてチャンネル鋼を用いている。横桁固定部３２はアングル鋼やチャンネル鋼以外のものを用いて構成することもできる。 A cross beam fixing part 32 is provided at the upper part of the vertical tie member 31d, higher than the erected part 31b. As shown in FIG. 9(a), the cross beam fixing part 32 includes a cross beam fitting part 32a that is fitted to the cross beam B, and a horizontal connecting member 32b that connects the cross beam fitting part 32a and the vertical tie member 31d. The vertical tie member 31d and the cross beam fitting part 32a are connected to the horizontal connecting member 32b with bolts and nuts. In this embodiment, angle steel is used as the cross beam fitting part 32a, and channel steel is used as the horizontal connecting member 32b. The cross beam fixing part 32 can also be constructed using materials other than angle steel and channel steel.

図９（ａ）に示す支持材固定具は、図９（ｂ）のように、縦梁１１の上面に宛がわれた縦梁宛がい部３１ａをボルトとナットで縦梁１１に固定し、横桁ＢのウェブＢ１に宛がわれた横桁宛がい部３２ａをボルトとナットで横桁Ｂに固定するとこで、足場支持材１０を横桁Ｂに固定することができる。 The support fixing device shown in Figure 9(a) can fix the scaffolding support 10 to the cross beam B by fixing the vertical beam attachment portion 31a, which is attached to the upper surface of the vertical beam 11, to the vertical beam 11 with a bolt and nut, and fixing the cross beam attachment portion 32a, which is attached to the web B1 of the cross beam B, to the cross beam B with a bolt and nut, as shown in Figure 9(b).

［先行ネット設備］
本発明の足場施工方法では、先行ネット設備４０を使用する。図１０（ａ）（ｂ）～図３０（ａ）（ｂ）に示す先行ネット設備４０は、各縦梁１１上に設置されるネット支持材４１と、ネット支持材４１の先方に設けられたネット縦支柱４２と、各ネット縦支柱４２の間に架設される上下の横支柱４３と、先行ネット４４を備えている。 [Advanced network equipment]
The scaffolding construction method of the present invention uses a leading net system 40. The leading net system 40 shown in Figures 10(a)(b) to 30(a)(b) includes a net support 41 installed on each vertical beam 11, a net vertical support 42 provided ahead of the net support 41, upper and lower horizontal supports 43 installed between each net vertical support 42, and a leading net 44.

各縦梁１１上に設置されるネット支持材４１は縦長棒状であり、長手方向の複数個所が各列の縦梁１１をつなぐ横つなぎ材４５で上から押さえられて支持されている。先行ネット４４は、先端側が下側の横支柱４３に、後端側が前区画で設置された足場パネルＡの先方に固定され、ネット支持材４１を先方へ移動させることによって、前区画で設置された足場パネルＡの先方に広がるように構成されている。なお、ここで説明した先行ネット設備４０は一例であり、先行ネット設備４０にはこれ以外の構造のものを用いることもできる。 The net support material 41 installed on each vertical beam 11 is a vertical rod-like shape, and is supported at multiple points in the longitudinal direction by being pressed down from above with horizontal tie materials 45 connecting the vertical beams 11 of each row. The leading net 44 is fixed at its leading end to the lower horizontal support 43 and at its rear end to the front of the scaffolding panel A installed in the front section, and is configured so that it spreads out to the front of the scaffolding panel A installed in the front section by moving the net support material 41 forward. Note that the leading net equipment 40 described here is just one example, and other structures can also be used for the leading net equipment 40.

［足場施工方法］
次に、本発明の足場施工方法の一例を、前述した足場支持材１０、支持材旋回金具２０、支持材固定具３０及び先行ネット設備４０を用いて、恒常的に設置される足場（以下「常設足場」という）を施工する場合を一例として説明する。一例として図１０（ａ）（ｂ）～図３０（ａ）（ｂ）に示す足場施工方法は、パネル受け材１３を橋梁の幅方向に間隔をあけて四列配置し、それら四列のパネル受け材１３の間に足場パネルＡを三列設置する場合の例である。 [Scaffolding construction method]
Next, an example of the scaffolding construction method of the present invention will be described by taking as an example the case of constructing a permanently installed scaffolding (hereinafter referred to as "permanent scaffolding") using the above-mentioned scaffolding support material 10, support material swivel fitting 20, support material fixing device 30, and advance net equipment 40. As an example, the scaffolding construction method shown in Figures 10(a)(b) to 30(a)(b) is an example of the case where four rows of panel receiving materials 13 are arranged at intervals in the width direction of the bridge, and three rows of scaffolding panels A are installed between the four rows of panel receiving materials 13.

この実施形態の足場施工方法は、先行ネット設備設置工程Ｓ１、足場支持材設置工程Ｓ２、先行ネット送出し工程Ｓ３、第一旋回工程Ｓ４、第二旋回工程Ｓ５、第三・第四旋回工程Ｓ６、連結工程Ｓ７、パネル敷設工程Ｓ８、足場支持材設置工程（二次）Ｓ９、先行ネット送出し工程（二次）Ｓ１０、第一・第二旋回工程（二次）Ｓ１１、第三・第四旋回工程（二次）Ｓ１２、連結工程（二次）Ｓ１３、パネル敷設工程（二次）Ｓ１４、足場支持材設置工程（三次）Ｓ１５、先行ネット送出し工程（三次）Ｓ１６、第一・第二旋回工程（三次）１７、第三・第四旋回工程Ｓ１８、連結工程（三次）Ｓ１９、パネル敷設工程（三次）Ｓ２０、横桁固定工程Ｓ２１の工程を経て足場を設置する工法である。説明の便宜上、以下では、四列のパネル受け材１３について、各図（ｂ）の上側から下側に向かって第一列、第二列、第三列、第四列という。なお、図面を見やすくするため、図１０（ａ）（ｂ）～図３０（ａ）（ｂ）では前工程で設置した構成について図示を省略している部分がある。 The scaffolding construction method of this embodiment is a construction method in which scaffolding is installed through the steps of a preceding net equipment installation process S1, a scaffolding support material installation process S2, a preceding net sending out process S3, a first rotation process S4, a second rotation process S5, a third and fourth rotation process S6, a connecting process S7, a panel laying process S8, a scaffolding support material installation process (secondary) S9, a preceding net sending out process (secondary) S10, a first and second rotation process (secondary) S11, a third and fourth rotation process (secondary) S12, a connecting process (secondary) S13, a panel laying process (secondary) S14, a scaffolding support material installation process (tertiary) S15, a preceding net sending out process (tertiary) S16, a first and second rotation process (tertiary) S17, a third and fourth rotation process S18, a connecting process (tertiary) S19, a panel laying process (tertiary) S20, and a cross beam fixing process S21. For ease of explanation, the four rows of panel support materials 13 are hereinafter referred to as the first row, second row, third row, and fourth row from top to bottom in each figure (b). Note that to make the drawings easier to see, some parts of the configuration installed in the previous process are omitted from the illustrations in Figures 10 (a) (b) to 30 (a) (b).

前記先行ネット設備設置工程Ｓ１は、図１０（ａ）（ｂ）に示すように、足場パネルＡの先方に先行ネット設備４０を組み立てる工程である。この工程では、各縦梁１１上にネット支持材４１を設置し、それらネット支持材４１を横つなぎ材４５で保持することで、先行ネット設備４０を足場パネルＡの先方に設置する。 The preceding net equipment installation process S1 is a process of assembling the preceding net equipment 40 on the front side of the scaffolding panel A, as shown in Figures 10(a) and 10(b). In this process, net support materials 41 are installed on each vertical beam 11, and the net support materials 41 are held by horizontal tie materials 45, thereby installing the preceding net equipment 40 on the front side of the scaffolding panel A.

前記足場支持材設置工程Ｓ２は、図１１（ａ）（ｂ）に示すように、足場支持材１０を設置する工程である。この工程では、新規の足場支持材１０（以下「第一後続足場支持材」という）１０Ｂを、支持材旋回金具２０を用いて既設の足場支持材（以下「先行足場支持材」という）１０Ａに連結する。具体的には、第一後続足場支持材１０Ｂと先行足場支持材１０Ａとを、両者の長手方向の端面を揃えて平行又は略平行に並ぶように設置し、両者の端面が揃った側の端部を支持材旋回金具２０で連結する。より具体的には、支持材旋回金具２０の上部第一プレート２１ａ及び下部第一プレート２２ａを第一後続足場支持材１０Ｂに固定し、支持材旋回金具２０の上部第二プレート２１ｇ及び下部第二プレート２２ｇを先行足場支持材１０Ａに固定する。この工程は、第一列から第四列のそれぞれについて行う。 The scaffolding support installation process S2 is a process of installing a scaffolding support 10, as shown in Figures 11(a) and 11(b). In this process, a new scaffolding support 10 (hereinafter referred to as the "first following scaffolding support") 10B is connected to an existing scaffolding support (hereinafter referred to as the "leading scaffolding support") 10A using a support swivel fitting 20. Specifically, the first following scaffolding support 10B and the leading scaffolding support 10A are installed so that their longitudinal end faces are aligned and parallel or approximately parallel, and the ends on the side where the end faces of both are aligned are connected by the support swivel fitting 20. More specifically, the upper first plate 21a and the lower first plate 22a of the support swivel fitting 20 are fixed to the first following scaffolding support 10B, and the upper second plate 21g and the lower second plate 22g of the support swivel fitting 20 are fixed to the leading scaffolding support 10A. This process is performed for each of the first through fourth rows.

前記先行ネット送出し工程Ｓ３は、図１２（ａ）（ｂ）に示すように、先行ネット設備設置工程Ｓ１で設置した先行ネット設備４０を先方へ送り出して先行ネット４４を広げる工程である。この工程では、各先行足場支持材１０Ａの縦梁１１に支持されて横つなぎ材４５で連結された複数本のネット支持材４１を送り出し、先行足場支持材１０Ａに敷設された足場パネルＡの先方に先行ネット４４を広げる。ネット支持材４１の送出しには、図示しないチェーンブロックなどを用いることができる。 As shown in Figures 12(a) and (b), the preceding net sending out process S3 is a process of sending out the preceding net equipment 40 installed in the preceding net equipment installation process S1 ahead to spread the preceding net 44. In this process, multiple net support materials 41 supported by the vertical beams 11 of each preceding scaffolding support material 10A and connected by horizontal ties 45 are sent out, and the preceding net 44 is spread ahead of the scaffolding panel A laid on the preceding scaffolding support material 10A. A chain block (not shown) or the like can be used to send out the net support material 41.

前記第一旋回工程Ｓ４は、図１３（ａ）（ｂ）に示すように、足場支持材設置工程Ｓ２で設置した四つの第一後続足場支持材１０Ｂのうちの三つ（第一列、第三列及び第四列）を、先方に向けて９０度旋回（回転）させる工程である。この工程は、横桁Ｂに突設されたブラケットＣと第一後続足場支持材１０Ｂの間に設けられたチェーンブロックＤで第一後続足場支持材１０Ｂを吊った状態で行う。第一後続足場支持材１０Ｂを先方に向けて９０度旋回させたのち、吊材１２のボルト１２ｃを緩めてパネル受け材１３を縦梁１１の直下に位置させ、その状態で吊材１２のボルト１２ｃを締結する（図３（ａ）～（ｃ）参照）。 As shown in Fig. 13(a) and (b), the first rotation step S4 is a step of rotating three (first, third and fourth rows) of the four first following scaffolding supports 10B installed in the scaffolding support installation step S2 by 90 degrees toward the front. This step is performed in a state where the first following scaffolding support 10B is suspended by a chain block D installed between a bracket C protruding from a cross beam B and the first following scaffolding support 10B. After rotating the first following scaffolding support 10B by 90 degrees toward the front, the bolt 12c of the hanging member 12 is loosened to position the panel support member 13 directly below the vertical beam 11, and in this state, the bolt 12c of the hanging member 12 is tightened (see Fig. 3(a) to (c)).

前記第二旋回工程Ｓ５は、図１４（ａ）（ｂ）に示すように、第一旋回工程Ｓ４で９０度旋回させた第一後続足場支持材１０Ｂをさらに先方に向けて９０度旋回させる工程である。この工程では、第一後続足場支持材１０Ｂの一端側が先行足場支持材１０Ａの先端部と対向する位置まで第一後続足場支持材１０Ｂを回転させ、第一後続足場支持材１０Ｂが先行足場支持材１０Ａの先方に一列に並ぶようにする。 As shown in Figures 14(a) and 14(b), the second rotation step S5 is a step of rotating the first trailing scaffolding support 10B, which was rotated 90 degrees in the first rotation step S4, by another 90 degrees toward the front. In this step, the first trailing scaffolding support 10B is rotated to a position where one end side of the first trailing scaffolding support 10B faces the tip end of the leading scaffolding support 10A, so that the first trailing scaffolding support 10B is lined up in a row ahead of the leading scaffolding support 10A.

前記第三・第四旋回工程Ｓ６は、図１５（ａ）（ｂ）に示すように、足場支持材設置工程Ｓ２で設置した四つの第一後続足場支持材１０Ｂのうちの残りの一つ（第二列）を先方に向けて９０度旋回させ、その状態からさらに先方に向けて９０度旋回させる工程である。最初の９０度旋回させる工程（第三旋回工程）は、前記第一旋回工程Ｓ４に相当する工程であり、第一旋回工程Ｓ４と同じ手順で行うことができる。その後に９０度旋回させる工程（第四旋回工程）は、第二旋回工程Ｓ５に相当する工程であり、第二旋回工程Ｓ５と同じ手順で行うことができる。なお、この工程でも、最初の９０度旋回ののち、吊材１２のボルト１２ｃを緩めてパネル受け材１３を縦梁１１の直下に位置させ、その状態で吊材１２のボルト１２ｃを締結する（図３（ａ）～（ｃ）参照）。 As shown in Fig. 15(a) and (b), the third and fourth rotation steps S6 are steps of rotating one of the remaining first subsequent scaffolding supports 10B (second row) of the four first subsequent scaffolding supports 10B installed in the scaffolding support installation step S2 by 90 degrees toward the front, and then rotating it by another 90 degrees toward the front from that state. The first 90-degree rotation step (third rotation step) corresponds to the first rotation step S4, and can be performed in the same manner as the first rotation step S4. The next 90-degree rotation step (fourth rotation step) corresponds to the second rotation step S5, and can be performed in the same manner as the second rotation step S5. Note that in this step as well, after the first 90-degree rotation, the bolt 12c of the hanging member 12 is loosened to position the panel support member 13 directly below the vertical beam 11, and in that state, the bolt 12c of the hanging member 12 is tightened (see Figs. 3(a) to (c)).

前記連結工程Ｓ７は、図１６（ａ）（ｂ）に示すように、各第一後続足場支持材１０Ｂと先行足場支持材１０Ａを連結する支持材旋回金具２０を撤去したのち、各第一後続足場支持材１０Ｂと各先行足場支持材１０Ａとを連結して足場支持列を形成する工程である。この工程では、先行足場支持材１０Ａの先方に第一後続足場支持材１０Ｂが一列に並んだ状態で、両者を連結する支持材旋回金具２０を撤去し、その後、各先行足場支持材１０Ａの縦梁１１と各第一後続足場支持材１０Ｂの縦梁１１、及び各先行足場支持材１０Ａのパネル受け材１３と各第一後続足場支持材１０Ｂのパネル受け材１３を連結する。連結には添接板とボルト・ナットなどを用いることができる。足場支持列は橋梁の幅方向に間隔をあけて複数列形成する。 As shown in Fig. 16(a) and (b), the connecting step S7 is a step of removing the support swivel fittings 20 that connect each of the first following scaffolding supports 10B and the leading scaffolding supports 10A, and then connecting each of the first following scaffolding supports 10B and each leading scaffolding support 10A to form a scaffolding support row. In this step, the support swivel fittings 20 that connect the first following scaffolding supports 10B to each leading scaffolding support 10A are removed with the first following scaffolding supports 10B lined up in a row ahead of the leading scaffolding supports 10A, and then the vertical beams 11 of each leading scaffolding support 10A and the vertical beams 11 of each first following scaffolding support 10B, and the panel support members 13 of each leading scaffolding support 10A and the panel support members 13 of each first following scaffolding support 10B are connected. Splice plates, bolts, nuts, etc. can be used for the connection. Multiple scaffolding support rows are formed at intervals in the width direction of the bridge.

前記パネル敷設工程Ｓ８は、図１７（ａ）（ｂ）に示すように、前記連結工程Ｓ７で形成された複数の足場支持列のうち、隣接する足場支持列の第一後続足場支持材１０Ｂのパネル受け材１３上に、所定枚数の足場パネルＡを敷設する工程である。この工程では、足場パネルＡを先行足場支持材１０Ａに近い方から順次第一後続足場支持材１０Ｂのパネル受け材１３上に載置し、その足場パネルＡを押さえ具１４によってパネル受け材１３に保持する。この工程は、横桁Ｂに突設されたブラケットＣと間に設けられたチェーンブロックＤで足場パネルＡを吊った状態で行う。 As shown in Fig. 17(a) and (b), the panel laying step S8 is a step of laying a predetermined number of scaffolding panels A on the panel receiving material 13 of the first following scaffolding support member 10B of adjacent scaffolding support rows among the multiple scaffolding support rows formed in the connecting step S7. In this step, the scaffolding panels A are sequentially placed on the panel receiving material 13 of the first following scaffolding support member 10B starting from the one closest to the leading scaffolding support member 10A, and the scaffolding panels A are held on the panel receiving material 13 by the clamps 14. This step is performed with the scaffolding panels A suspended by brackets C protruding from the cross beams B and chain blocks D installed between them.

前記足場支持材設置工程（二次）Ｓ９は、図１８（ａ）（ｂ）に示すように、各先行足場支持材１０Ａの先方に設置された各第一後続足場支持材１０Ｂに、さらに別の足場支持材（以下「第二後続足場支持材」という）１０Ｃ設置する工程である。ここで用いる足場支持材は、足場支持材設置工程Ｓ２で用いたものと同じものである。この工程は、前記足場支持材設置工程Ｓ２と同じ手順で行うことができる。 The scaffolding support installation process (secondary) S9 is a process of installing another scaffolding support (hereinafter referred to as "second subsequent scaffolding support") 10C on each first subsequent scaffolding support 10B installed ahead of each leading scaffolding support 10A, as shown in Figures 18(a) and (b). The scaffolding support used here is the same as that used in the scaffolding support installation process S2. This process can be carried out in the same procedure as the scaffolding support installation process S2.

前記先行ネット送出し工程（二次）Ｓ１０は、図１９（ａ）（ｂ）に示すように、先行ネット設備設置工程Ｓ１で設置した先行ネット設備４０を先方へ送り出す工程である。この工程は前記先行ネット送出し工程Ｓ３と同じ手順で行うことができる。 The preceding net sending process (secondary) S10 is a process of sending the preceding net equipment 40 installed in the preceding net equipment installation process S1 to the destination, as shown in Figures 19(a) and (b). This process can be performed in the same procedure as the preceding net sending process S3.

前記第一・第二旋回工程（二次）Ｓ１１は、図２０（ａ）（ｂ）に示すように、足場支持材設置工程（二次）Ｓ９で設置した四つの第二後続足場支持材１０Ｃのうちの三つ（第一列、第三列及び第四列）を、先方に向けて９０度旋回させ、その状態からさらに先方に向けて９０度旋回させる工程である。最初の９０度旋回させる工程は、前記第一旋回工程Ｓ４に相当する工程であり、第一旋回工程Ｓ４と同じ手順で行うことができる。その後の９０度旋回は、前記第二旋回工程Ｓ５に相当する工程であり、第二旋回工程Ｓ５と同じ手順で行うことができる。 The first and second rotation steps (secondary) S11, as shown in Figures 20(a) and (b), are steps in which three of the four second subsequent scaffolding supports 10C (first row, third row, and fourth row) installed in the scaffolding support installation step (secondary) S9 are rotated 90 degrees toward the front, and then rotated another 90 degrees toward the front from that state. The first 90-degree rotation step corresponds to the first rotation step S4, and can be performed using the same procedure as the first rotation step S4. The subsequent 90-degree rotation corresponds to the second rotation step S5, and can be performed using the same procedure as the second rotation step S5.

前記第三・第四旋回工程（二次）Ｓ１２は、図２１（ａ）（ｂ）に示すように、足場支持材設置工程（二次）Ｓ９で設置した四つの第二後続足場支持材１０Ｃのうちの残りの一つ（第二列）を先方に向けて９０度旋回させ、その状態からさらに先方に向けて９０度旋回させる工程である。最初の９０度旋回させる工程（第三旋回工程（二次））は、前記第一旋回工程Ｓ４に相当する工程であり、第一旋回工程Ｓ４と同じ手順で行うことができる。その後に９０度旋回させる工程（第四旋回工程（二次））は、前記第二旋回工程Ｓ５に相当する工程であり、第二旋回工程Ｓ５と同じ手順で行うことができる。 The third and fourth rotation steps (secondary) S12 are steps of rotating one of the remaining four second subsequent scaffolding supports 10C (second row) installed in the scaffolding support installation step (secondary) S9 by 90 degrees toward the front as shown in Figs. 21(a) and (b), and then rotating it another 90 degrees toward the front from that state. The first 90-degree rotation step (third rotation step (secondary)) corresponds to the first rotation step S4 and can be performed in the same manner as the first rotation step S4. The subsequent 90-degree rotation step (fourth rotation step (secondary)) corresponds to the second rotation step S5 and can be performed in the same manner as the second rotation step S5.

前記連結工程（二次）Ｓ１３は、図２２（ａ）（ｂ）に示すように、各第一後続足場支持材１０Ｂと第二後続足場支持材１０Ｃを連結する支持材旋回金具２０を撤去したのち、各第一後続足場支持材１０Ｂと各第二後続足場支持材１０Ｃとを連結して足場支持列を形成する工程である。この工程は、前記連結工程Ｓ７に相当する工程であり、連結工程Ｓ７と同じ手順で行うことができる。 The connecting step (secondary) S13 is a step of removing the support swivel fittings 20 that connect each of the first subsequent scaffolding supports 10B and the second subsequent scaffolding supports 10C, and then connecting each of the first subsequent scaffolding supports 10B and each of the second subsequent scaffolding supports 10C to form a scaffolding support row, as shown in Figures 22(a) and (b). This step corresponds to the connecting step S7, and can be performed in the same procedure as the connecting step S7.

前記パネル敷設工程（二次）Ｓ１４は、図２３（ａ）（ｂ）に示すように、前記連結工程（二次）Ｓ１３で形成された複数の足場支持列のうち、隣接する足場支持列の第二後続足場支持材１０Ｃのパネル受け材１３上に、所定枚数の足場パネルＡを敷設する工程である。この工程は、前記パネル敷設工程Ｓ８に相当する工程であり、パネル敷設工程Ｓ８と同じ手順で行うことができる。 As shown in Figures 23(a) and (b), the panel laying process (secondary) S14 is a process of laying a predetermined number of scaffolding panels A on the panel receiving material 13 of the second subsequent scaffolding support material 10C of an adjacent scaffolding support row among the multiple scaffolding support rows formed in the connecting process (secondary) S13. This process corresponds to the panel laying process S8, and can be carried out in the same procedure as the panel laying process S8.

前記足場支持材設置工程（三次）Ｓ１５は、図２４（ａ）（ｂ）に示すように、第一後続足場支持材１０Ｂの先方に設置された第二後続足場支持材１０Ｃに、さらに別の足場支持材（以下「第三後続足場支持材」という）１０Ｄを設置する工程である。ここで用いる足場支持材は、足場支持材設置工程Ｓ２で用いたものと同じものである。この工程は、前記足場支持材設置工程Ｓ２と同じ手順で行うことができる。 The scaffolding support installation process (tertiary) S15 is a process of installing yet another scaffolding support (hereinafter referred to as the "third subsequent scaffolding support") 10D on the second subsequent scaffolding support 10C installed ahead of the first subsequent scaffolding support 10B, as shown in Figures 24 (a) and (b). The scaffolding support used here is the same as that used in the scaffolding support installation process S2. This process can be carried out in the same procedure as the scaffolding support installation process S2.

前記先行ネット送出し工程（三次）Ｓ１６は、図２５（ａ）（ｂ）に示すように、先行ネット設備設置工程Ｓ１で設置した先行ネット設備４０を先方へ送り出す工程である。この工程は前記先行ネット送出し工程Ｓ３と同じ手順で行うことができる。 The preceding net sending process (tertiary) S16 is a process of sending the preceding net equipment 40 installed in the preceding net equipment installation process S1 to the destination, as shown in Figures 25(a) and (b). This process can be performed in the same procedure as the preceding net sending process S3.

前記第一・第二旋回工程（三次）Ｓ１７は、図２６（ａ）（ｂ）に示すように、足場支持材設置工程（三次）Ｓ１５で設置した四つの第三後続足場支持材１０Ｄのうちの三つ（第一列、第三列及び第四列）を、先方に向けて９０度旋回させ、その状態からさらに先方に向けて９０度旋回させる工程である。最初の９０度旋回させる工程は、前記第一旋回工程Ｓ４に相当する工程であり、第一旋回工程Ｓ４と同じ手順で行うことができる。その後の９０度旋回は、第二旋回工程Ｓ５に相当する工程であり、第二旋回工程Ｓ５と同じ手順で行うことができる。 As shown in Figures 26(a) and (b), the first and second rotation steps (tertiary) S17 are steps in which three of the four third subsequent scaffolding supports 10D (first row, third row, and fourth row) installed in the scaffolding support installation step (tertiary) S15 are rotated 90 degrees toward the front, and then rotated another 90 degrees toward the front from that state. The first 90-degree rotation step corresponds to the first rotation step S4, and can be performed using the same procedure as the first rotation step S4. The subsequent 90-degree rotation corresponds to the second rotation step S5, and can be performed using the same procedure as the second rotation step S5.

前記第三・第四旋回工程Ｓ１８は、図２７（ａ）（ｂ）に示すように、足場支持材設置工程（三次）Ｓ１５で設置した四つの第三後続足場支持材１０Ｄのうちの残りの一つ（第二列）を先方に向けて９０度旋回させ、その状態からさらに先方に向けて９０度旋回させる工程である。最初の９０度旋回させる工程（第三旋回工程（三次））は、前記第一旋回工程Ｓ４に相当する工程であり、第一旋回工程Ｓ４と同じ手順で行うことができる。その後に９０度旋回させる工程（第四旋回工程（三次））は、第二旋回工程Ｓ５に相当する工程であり、第二旋回工程Ｓ５と同じ手順で行うことができる。 As shown in Figures 27(a) and (b), the third and fourth rotation steps S18 are steps of rotating one of the remaining three subsequent scaffolding supports 10D (second row) of the four installed in the scaffolding support installation step (tertiary) S15 by 90 degrees toward the front, and then rotating it another 90 degrees toward the front from that state. The first 90-degree rotation step (third rotation step (tertiary)) corresponds to the first rotation step S4, and can be performed using the same procedure as the first rotation step S4. The subsequent 90-degree rotation step (fourth rotation step (tertiary)) corresponds to the second rotation step S5, and can be performed using the same procedure as the second rotation step S5.

前記連結工程（三次）Ｓ１９は、図２８（ａ）（ｂ）に示すように、各第三後続足場支持材１０Ｄと第二後続足場支持材１０Ｃを連結する支持材旋回金具２０を撤去したのち、各第三後続足場支持材１０Ｄと各第二後続足場支持材１０Ｃとを連結して足場支持列を形成する工程である。この工程は、前記連結工程Ｓ７に相当する工程であり、連結工程Ｓ７と同じ手順で行うことができる。 The connecting step (tertiary) S19 is a step of removing the support swivel fittings 20 that connect each of the third subsequent scaffolding supports 10D and the second subsequent scaffolding supports 10C, and then connecting each of the third subsequent scaffolding supports 10D and each of the second subsequent scaffolding supports 10C to form a scaffolding support row, as shown in Figures 28(a) and (b). This step corresponds to the connecting step S7, and can be performed in the same procedure as the connecting step S7.

前記パネル敷設工程（三次）Ｓ２０は、図２９（ａ）（ｂ）に示すように、前記連結工程（三次）Ｓ１９で形成された複数の足場支持列のうち、隣接する足場支持列の第三後続足場支持材１０Ｄのパネル受け材１３上に、所定枚数の足場パネルＡを敷設する工程である。この工程は、前記パネル敷設工程Ｓ８に相当する工程であり、パネル敷設工程Ｓ８と同じ手順で行うことができる。 As shown in Figures 29(a) and (b), the panel laying process (tertiary) S20 is a process of laying a predetermined number of scaffolding panels A on the panel receiving material 13 of the third subsequent scaffolding support material 10D of an adjacent scaffolding support row among the multiple scaffolding support rows formed in the connecting process (tertiary) S19. This process corresponds to the panel laying process S8 and can be carried out in the same procedure as the panel laying process S8.

前記横桁固定工程Ｓ２１は、図３０（ａ）（ｂ）に示すように、横桁Ｂに固定された支持材固定具３０で各第三後続足場支持材１０Ｄを支持する工程である。ここで用いる支持材固定具３０は、横桁Ｂに固定される横桁固定部３２と縦梁１１に固定される縦梁固定部３１を備えている。この工程では、削孔機で横桁Ｂの所定位置に孔をあけ、横桁固定部３２を横桁ＢのウェブＢ１にボルトで固定し、縦梁固定部３１を縦梁１１にボルトで固定する。 As shown in Figures 30(a) and (b), the cross beam fixing process S21 is a process of supporting each third subsequent scaffolding support 10D with a support material fixing device 30 fixed to the cross beam B. The support material fixing device 30 used here has a cross beam fixing part 32 fixed to the cross beam B and a vertical beam fixing part 31 fixed to the vertical beam 11. In this process, a hole is drilled at a predetermined position of the cross beam B with a drilling machine, the cross beam fixing part 32 is fixed to the web B1 of the cross beam B with a bolt, and the vertical beam fixing part 31 is fixed to the vertical beam 11 with a bolt.

図示は省略しているが、この実施形態では、前記横桁固定工程Ｓ２１の終了後、足場パネルＡの落下を防止するための落下防止ワイヤの設置工程や、振れ止めのための振れ止め具の設置工程などが行われる。具体的には、落下防止ワイヤの設置工程では、敷設した足場パネルＡに落下防止ワイヤを取り付け、当該落下防止ワイヤを横桁Ｂの下フランジに定着することで、敷設した足場パネルＡの落下を防止する。また、振れ止め具の設置工程では、横桁ＢのウェブＢ１と足場支持材の縦梁１１に振れ止め具を固定し振れ止めを防止する。 Although not shown in the figures, in this embodiment, after the cross beam fixing step S21 is completed, a fall prevention wire installation step for preventing the scaffolding panel A from falling and a vibration prevention device installation step for preventing vibration are performed. Specifically, in the fall prevention wire installation step, a fall prevention wire is attached to the laid scaffolding panel A, and the fall prevention wire is fixed to the lower flange of the cross beam B, thereby preventing the laid scaffolding panel A from falling. In addition, in the vibration prevention device installation step, a vibration prevention device is fixed to the web B1 of the cross beam B and the vertical beam 11 of the scaffolding support material to prevent vibration.

この実施形態では、足場パネルＡの敷設作業が一区画分終了し、二区画目の敷設作業を行う場合を一例としているが、実際の現場では、以上の工程を所定区画分繰り返し行い、橋梁の下側の所定領域の全体に足場を設置する。 In this embodiment, the installation work of scaffolding panel A is completed for one section, and the installation work for the second section is taken as an example, but in an actual site, the above process is repeated for a predetermined number of sections, and scaffolding is installed over the entire predetermined area under the bridge.

なお、足場を設置する橋梁によって主桁間の間隔が異なり、現場によっては、主桁と設置した足場の間に隙間が生じることがある。この場合、主桁に最も近い足場支持材１０のパネル受け材１３と当該主桁の下フランジ上に図示しない端部パネルを敷設し、主桁と足場との間に隙間が生じないようにするのが好ましい。 The spacing between the girders varies depending on the bridge on which the scaffolding is installed, and at some sites, gaps may occur between the main girders and the installed scaffolding. In this case, it is preferable to lay an end panel (not shown) on the panel support material 13 of the scaffolding support material 10 closest to the main girder and the lower flange of the main girder to prevent gaps from occurring between the main girder and the scaffolding.

なお、説明の便宜上、前記実施形態では、足場支持材１０を、先行足場支持材１０Ａ、第一後続足場支持材１０Ｂ、第二後続足場支持材１０Ｃ又は第三後続足場支持材１０Ｄと区別して説明しているが、この表現は、二つの足場支持材間での関係を示すための便宜上のものである。先行足場支持材や後続足場支持材というのは相対的な概念であり、たとえば、第一後続足場支持材１０Ｂは、先行足場支持材１０Ａとの関係では後続足場支持材であるが、第二後続足場支持材１０Ｃとの関係では先行足場支持材である。同様に、第二後続足場支持材１０Ｃは第一後続足場支持材１０Ｂとの関係では後続足場支持材であるが、第三後続足場支持材１０Ｄとの関係では先行足場支持材である。 For convenience of explanation, in the above embodiment, the scaffolding support 10 is described as being distinguished between the leading scaffolding support 10A, the first trailing scaffolding support 10B, the second trailing scaffolding support 10C, and the third trailing scaffolding support 10D. This expression is for convenience of showing the relationship between the two scaffolding supports. The leading scaffolding support and the trailing scaffolding support are relative concepts. For example, the first trailing scaffolding support 10B is a trailing scaffolding support in relation to the leading scaffolding support 10A, but is a leading scaffolding support in relation to the second trailing scaffolding support 10C. Similarly, the second trailing scaffolding support 10C is a trailing scaffolding support in relation to the first trailing scaffolding support 10B, but is a leading scaffolding support in relation to the third trailing scaffolding support 10D.

［足場構造］
最後に、本願における足場構造の一例について説明する。前記工程を経て完成した足場は、支持材固定具３０の横桁固定部３２が横桁Ｂに固定され、縦梁１１が支持材固定具３０の縦梁固定部３１で支持され、パネル受け材１３が前記吊材１２によって縦梁１１の下側に吊り下げられ、パネル受け材１３に足場パネルＡが敷設された構造となる。 [Scaffolding structure]
Finally, an example of a scaffolding structure in the present application will be described. The scaffolding completed through the above steps has a structure in which the cross beam fixing portion 32 of the support material fixing device 30 is fixed to the cross beam B, the vertical beam 11 is supported by the vertical beam fixing portion 31 of the support material fixing device 30, the panel support material 13 is suspended below the vertical beam 11 by the hanging material 12, and the scaffolding panel A is laid on the panel support material 13.

（その他の実施形態）
前記実施形態において説明した足場支持材１０、支持材旋回金具２０及び支持材固定具３０並びに足場施工方法及び足場構造は一例であり、各発明は、その要旨を変更しない範囲で適宜構成の変更や入替え、追加、省略等が可能である。また、前記実施形態における足場支持材１０の列数や足場パネルＡの列数、一区画に設置する足場支持材１０や足場パネルＡの数は一例であり、これより多い場合も少ない場合もある。 Other embodiments
The scaffolding support 10, the support swivel fitting 20, the support fixing device 30, the scaffolding construction method, and the scaffolding structure described in the above embodiment are examples, and each invention can be modified, replaced, added, omitted, etc. as appropriate within the scope of the gist of the invention. Also, the number of rows of the scaffolding support 10 and the number of rows of the scaffolding panels A in the above embodiment, and the number of the scaffolding support 10 and the scaffolding panels A installed in one section are examples, and there may be more or less than these.

前記実施形態では、高架構造物の下側に常設足場を設置する場合を一例としているが、本発明の足場施工方法及び本願における足場構造、並びにこれらに用いる足場支持材１０、支持材旋回金具２０及び支持材固定具３０は、仮設足場を設置する場合にも利用することができる。 In the above embodiment, an example is given of a case where a permanent scaffolding is installed under an elevated structure, but the scaffolding construction method of the present invention and the scaffolding structure in this application , as well as the scaffolding support material 10, support material swivel fitting 20 and support material fixing device 30 used therein, can also be used when installing a temporary scaffolding.

本発明の足場施工方法及び本願における足場構造、並びにこれらに用いる足場支持材１０、支持材旋回金具２０及び支持材固定具３０は、既設橋のような既設高架構造物に足場を設置する場合のみならず、新設橋をはじめとする新設高架構造物に足場を設置する場合にも利用することができる。 The scaffolding construction method of the present invention and the scaffolding structure in this application , as well as the scaffolding support 10, support swivel bracket 20 and support fastener 30 used therein, can be used not only when installing scaffolding on existing elevated structures such as existing bridges, but also when installing scaffolding on newly constructed elevated structures such as newly built bridges.

１０足場支持材
１０Ａ足場支持材（先行足場支持材）
１０Ｂ足場支持材（第一後続足場支持材）
１０Ｃ足場支持材（第二後続足場支持材）
１０Ｄ足場支持材（第三後続足場支持材）
１１縦梁
１１ａ取付け材
１２吊材
１２ａ、１２ｂ平板材
１２ｃボルト
１３パネル受け材
１３ａ受け部
１３ｂ立ち上がり部
１３ｃ、１３ｄ突条
１４押さえ具
２０支持材旋回金具
２１上固定部
２１ａ上部第一プレート
２１ｂ上部第一突き出し部
２１ｃ上部第一挿通孔
２１ｄ上部第一長板材
２１ｅ上部第一プレートブロック
２１ｆ上部第一ボルト孔
２１ｇ上部第二プレート
２１ｈ上部第二突き出し部
２１ｉ上部第二挿通孔
２１ｊ上部第二長板材
２１ｋ上部第二ボルト孔
２２下固定部
２２ａ下部第一プレート
２２ｂ下部第一突き出し部
２２ｃ下部第一挿通孔
２２ｄ下部第一長板材
２２ｅ下部第二プレートブロック
２２ｆ下部第二ボルト孔
２２ｇ下部第二プレート
２２ｈ下部第二突き出し部
２２ｉ下部第二挿通孔
２２ｊ下部第二長板材
２２ｋ下部第一ボルト孔
２３連結ピン
２３ａナット
２４鞘管
２４ａ鞘管通孔
３０支持材固定具
３１縦梁固定部
３１ａ縦梁宛がい部
３１ｂ立設部
３１ｃ支持部
３１ｄ縦つなぎ材
３２横桁固定部
３２ａ横桁宛がい部
３２ｂ横連結材
４０先行ネット設備
４１ネット支持材
４２ネット縦支柱
４３横支柱
４４先行ネット
４５横つなぎ材
Ａ足場パネル
Ｂ横桁
Ｂ１（横桁の）ウェブ
Ｃブラケット
Ｄチェーンブロック 10 Scaffolding support material 10A Scaffolding support material (preceding scaffolding support material)
10B Scaffolding support (first subsequent scaffolding support)
10C Scaffolding support (second subsequent scaffolding support)
10D Scaffolding support (third subsequent scaffolding support)
REFERENCE SIGNS LIST 11 longitudinal beam 11a mounting member 12 hanging member 12a, 12b flat plate member 12c bolt 13 panel support member 13a support portion 13b rising portion 13c, 13d protrusion 14 clamp 20 support member swivel fitting 21 upper fixing portion 21a upper first plate 21b upper first protruding portion 21c upper first insertion hole 21d upper first long plate member 21e upper first plate block 21f upper first bolt hole 21g upper second plate 21h upper second protruding portion 21i upper second insertion hole 21j upper second long plate member 21k upper second bolt hole 22 lower fixing portion 22a lower first plate 22b lower first protruding portion 22c lower first insertion hole 22d lower first long plate member 22e lower second plate block Description of the Related Art 22f Lower second bolt hole 22g Lower second plate 22h Lower second protruding portion 22i Lower second insertion hole 22j Lower second long plate material 22k Lower first bolt hole 23 Connecting pin 23a Nut 24 Sheath tube 24a Sheath tube through hole 30 Support material fixing device 31 Longitudinal beam fixing portion 31a Longitudinal beam matching portion 31b Standing portion 31c Support portion 31d Vertical tie material 32 Horizontal beam fixing portion 32a Horizontal beam matching portion 32b Horizontal connecting material 40 Leading net equipment 41 Net support material 42 Net vertical support 43 Horizontal support 44 Leading net 45 Horizontal tie material A Scaffold panel B Horizontal beam B1 (of horizontal beam) Web C Bracket D Chain block

Claims

高架構造物の下側に設置される足場の施工方法において、
後続足場支持材を先行足場支持材と平行又は略平行に横並びに配置し、
前記先行足場支持材と後続足場支持材を支持材旋回金具で連結し、
前記後続足場支持材を、前記支持材旋回金具の部分から前記先行足場支持材の先方側に横旋回させて当該先行足場支持材と一列にし、
前記一列にした先行足場支持材と後続足場支持材とを連結して足場支持列を形成し、
前記足場支持列を前記高架構造物の幅方向に間隔をあけて複数列形成し、
前記複数列の足場支持列のうち隣接する足場支持列の後続足場支持材に足場パネルを敷設する、
ことを特徴とする足場施工方法。 A method for constructing scaffolding installed under an elevated structure, comprising:
The trailing scaffolding support is arranged side-by-side in parallel or approximately parallel to the leading scaffolding support;
The leading scaffolding support and the trailing scaffolding support are connected with a support swivel fitting,
The trailing scaffolding support is laterally rotated from the support pivot fitting toward the forward side of the leading scaffolding support to be aligned with the leading scaffolding support,
The preceding scaffolding support member and the following scaffolding support member arranged in a row are connected to form a scaffolding support row;
The scaffolding support rows are formed in a plurality of rows spaced apart in the width direction of the elevated structure,
Laying a scaffolding panel on a subsequent scaffolding support of an adjacent scaffolding support row among the plurality of scaffolding support rows;
A scaffolding construction method characterized by the above.

請求項１記載の足場施工方法において、
後続足場支持材は、縦梁と当該縦梁に取り付けられた吊材と当該吊材で吊り下げられたパネル受け材を備え、
前記後続足場支持材を先行足場支持材の先方側に向けて横旋回させる際に、後続足場支持材が先行足場支持材に敷設された足場パネルで支持されない位置まで旋回したところで当該後続足場支持材を停止させ、
前記停止させた後続足場支持材の縦梁とパネル受け材の長手方向の端面が揃うように、両者を吊材で固定する、
ことを特徴とする足場施工方法。 In the scaffolding construction method according to claim 1,
The trailing scaffolding support member includes a vertical beam, a hanging member attached to the vertical beam, and a panel support member suspended by the hanging member;
When the trailing scaffolding support is rotated laterally toward the forward side of the leading scaffolding support, the trailing scaffolding support is stopped when the trailing scaffolding support has rotated to a position where it is not supported by the scaffolding panel laid on the leading scaffolding support,
The vertical beam of the stopped trailing scaffolding support member and the longitudinal end face of the panel support member are aligned with each other by fixing them with a hanging member.
A scaffolding construction method characterized by the above.

請求項１又は請求項２記載の足場施工方法において、
先行足場支持材の先方に任意数の後続足場支持材を連結することによって後続足場支持材を所定位置まで到達させ、
前記所定位置まで到達した後続足場支持材を、横桁固定部及び縦梁固定部を備えた鋼製の支持材固定具で高架構造物の横桁に固定する、
ことを特徴とする足場施工方法。 In the scaffolding construction method according to claim 1 or 2,
By connecting any number of subsequent scaffolding supports to the front of the leading scaffolding support, the subsequent scaffolding supports are allowed to reach a predetermined position;
The subsequent scaffolding support that has reached the predetermined position is fixed to the cross beam of the elevated structure by a steel support fixing device having a cross beam fixing portion and a vertical beam fixing portion.
A scaffolding construction method characterized by the above.

請求項１から請求項３のいずれか１項に記載の足場施工方法において、
先行足場支持材に敷設された先行足場パネルの先方に先行ネット設備を設置し、
少なくとも、先行足場支持材への後続足場支持材の連結及び当該後続足場支持材への足場パネルの敷設を前記先行ネット設備の上方で行う、
ことを特徴とする足場施工方法。 In the scaffolding construction method according to any one of claims 1 to 3,
A leading net equipment is installed ahead of the leading scaffolding panel laid on the leading scaffolding support material,
At least, the connection of the trailing scaffolding support to the leading scaffolding support and the laying of the scaffolding panel on the trailing scaffolding support are performed above the leading net equipment;
A scaffolding construction method characterized by the above.