JP5484983B2

JP5484983B2 - Method for assembling and dismantling bridge moving work device

Info

Publication number: JP5484983B2
Application number: JP2010070644A
Authority: JP
Inventors: 健二野永; 加藤　　学; 芳雄寺島
Original assignee: 株式会社錢高組; 巴機械工業株式会社
Priority date: 2010-03-25
Filing date: 2010-03-25
Publication date: 2014-05-07
Anticipated expiration: 2030-03-25
Also published as: JP2011202406A

Description

本発明は、橋梁の張出し架設工事において使用される移動作業車（ワーゲン）と、前記移動作業車によって懸垂支持される吊り床構造体とを備える橋梁移動作業装置の組立て方法及び解体方法に係り、特に橋梁の張出し方向の橋脚下方に十分な作業スペースが確保できない場合に好適な橋梁移動作業装置の組立て方法及び解体工法に関する。 The present invention relates to an assembling method and a disassembling method of a bridge moving work device including a moving work vehicle (wagen) used in bridge overhang construction work and a suspended floor structure suspended and supported by the moving work vehicle. In particular, the present invention relates to an assembling method and a dismantling method for a bridge moving work device that is suitable when a sufficient work space cannot be secured below a bridge pier in the direction in which the bridge extends.

橋梁の張出し架設工事において使用される橋梁移動作業装置の組立ては、通常、最初に施工される橋脚の柱頭部で行われる。
前記橋梁移動作業装置は、橋梁の橋桁の上で全体の荷重を支えながら橋梁の張出し方向に移動できるトラス構造の移動作業車と、前記移動作業車によって懸垂支持される吊り支保工と、同じく前記移動作業車によって懸垂支持される吊り床構造体とを備えることによって構成されている。 The assembly of the bridge moving work device used in the bridge overhang construction work is usually performed at the column head of the pier to be constructed first.
The bridge moving work device includes a truss-structured moving work vehicle that can move in the overhang direction of the bridge while supporting the entire load on the bridge girder of the bridge, and a suspension support work suspended and supported by the moving work vehicle. And a suspended floor structure suspended and supported by a mobile work vehicle.

また、橋梁の張出し方向の橋脚の下方に十分な広さの平らな作業スペースがある場合には、前記吊り床構造体は当該作業スペースで組み立てられ、前記橋脚の柱頭部に設置される移動作業車から吊り下げられるチェーンブロック等の吊り材によって橋桁下部の所定の設置位置まで引き上げられてその位置に保持される。
また、前記橋梁移動作業装置を解体する場合には、橋桁の施工の終了後、前記と逆の手順で橋梁移動作業装置の解体作業が実行される。 In addition, when there is a sufficiently large flat work space below the pier in the bridge extension direction, the suspended floor structure is assembled in the work space and installed in the head of the pier column. It is pulled up to a predetermined installation position below the bridge girder by a suspension material such as a chain block that is suspended from the car and held in that position.
Further, when dismantling the bridge moving work device, the dismantling work of the bridge moving work device is executed in the reverse procedure to that described above after completion of the construction of the bridge girder.

一方、橋梁の張出し方向の橋脚の下方に傾斜した法面、道路あるいは棧橋等が位置しており、所望の作業スペースが確保できない場合には、空中で前記吊り床構造体を組み立てることになる。
この場合、組み立てる吊り床構造体の下部に橋脚に沿って昇降足場を設置したり、昇降足場が設置できない場合には、高所作業車を使用することになる。更に、転落防止用の安全ネットを張り、親綱や安全帯等を装着して作業に当たることになる。 On the other hand, when a slope, a road, a bridge, or the like inclined below the pier in the direction in which the bridge extends is located and a desired work space cannot be secured, the suspension floor structure is assembled in the air.
In this case, when an elevating scaffolding is installed along the pier at the lower part of the suspended floor structure to be assembled, or when the elevating scaffolding cannot be installed, an aerial work vehicle is used. Furthermore, a safety net for preventing falls is attached, and a master rope and a safety belt are attached to work.

また、前記空中での吊り床構造体の組立てに際し、施工現場の下方に道路が通っている場合には、道路防護工を設置したり、道路の切り回しによって迂回路を形成したり、通行止め等によって当該道路を走行する車両の安全性を確保しなければならない。 In addition, when assembling the suspended floor structure in the air, if a road passes under the construction site, a road protection work is installed, a detour is formed by turning the road, a road closure, etc. Therefore, the safety of the vehicle traveling on the road must be ensured.

この他、橋梁の張出し方向の橋脚の下方に十分な大きさの作業スペースが確保できない場合に橋脚の幅方向の左右のスペースを利用し、吊り床構造体を分割して組み立て、その後空中に吊り上げて左右の吊り床構造体を接合して一体化するという下記の特許文献１に示すような移動吊支保工の組立て方法が一部では実施されている。 In addition, when a sufficiently large working space cannot be secured below the pier in the bridge extension direction, use the left and right spaces in the width direction of the pier, divide and assemble the suspended floor structure, and then lift it in the air As shown in Patent Document 1 below, a method for assembling a movable suspension support structure in which left and right suspended floor structures are joined and integrated is partially implemented.

特開２００８−３０３６６６号公報JP 2008-303666 A

しかし、橋梁の張出し方向の橋脚の下方に十分な広さの平らな作業スペースがない場合において、空中で吊り床構造体を組み立てることは安全性の点で問題がある。この場合、昇降足場の設置や転落防止用の安全ネットの張設、道路の切り回しや通行止め等によって安全性を確保したとしても、吊り床構造体の組立て後、これらを撤去しなければならず工期の長大化につながる。従って、長時間の吊り床構造体の組立て工事は、交通渋滞を招く等、交通の利便性を著しく損なわせることとなってしまう。 However, when there is no flat work space sufficiently wide below the pier in the direction in which the bridge extends, it is problematic in terms of safety to assemble the suspended floor structure in the air. In this case, even if safety is ensured by installing lifting scaffolding, safety nets to prevent falls, turning roads and closing roads, etc., these must be removed after the suspended floor structure is assembled. This leads to a longer construction period. Therefore, the assembly work of the suspended floor structure for a long period of time significantly impairs the convenience of traffic such as causing traffic congestion.

一方、前記特許文献１に開示されている橋脚の幅方向の左右スペースを利用した分割組立てによる方法で吊り床構造体を組み立てれば、前記空中組立てによる工法の問題点を解決できる場合もある。
しかし、前記特許文献１に開示されている分割組立てによる方法は、橋脚の幅方向の左右に作業スペースがない場合には実施できない。また、分割したものを別々に吊り上げ、空中で接合して一体化させるためには構造的にも大規模な設備が必要であり、当該設備の設置に伴なう経済的負担は過大なものとなってしまう。 On the other hand, if the suspended floor structure is assembled by the method of split assembly using the left and right spaces in the width direction of the pier disclosed in Patent Document 1, the problem of the construction method by the aerial assembly may be solved.
However, the method by split assembly disclosed in Patent Document 1 cannot be performed when there is no work space on the left and right in the width direction of the pier. In addition, in order to lift the separated parts separately and join them together in the air to integrate them, a large-scale equipment is required structurally, and the economic burden associated with the installation of the equipment is excessive. turn into.

本発明の課題は、橋梁の張出し方向における橋脚下方の限られた作業スペースを利用して過大な設備コストを要することなく、安全且つ短時間で橋梁移動作業装置の組立て及び解体作業を行うことができるようにすることにある。 An object of the present invention is to perform assembly and disassembly work of a bridge moving work device safely and in a short time without using excessive equipment costs by using a limited work space below the pier in the direction of overhanging the bridge. There is to be able to do it.

前記課題を解決するために本発明の第１の態様に係る橋梁移動作業装置の組立て方法は、橋脚の柱頭部上面に移動作業車を設置する第１工程と、前記移動作業車に吊持ちされる吊り床構造体の全部又は一部を前記橋脚に沿わせた縦姿勢で組み立てる第２工程と、前記柱頭部における固定位置から下げられる第１吊り材及び前記移動作業車から下げられる第２吊り材とによって前記吊り床構造体を吊り上げる第３工程とを有し、前記第３工程は、前記第１吊り材と第２吊り材の繰出し長さと、前記移動作業車の移動量とを調節することによって前記縦姿勢の吊り床構造体を回動させて横姿勢にし、前記柱頭部下方の所定の位置まで該吊り床構造体を吊り上げる回動吊上げ工程を含むことを特徴とするものである。 In order to solve the above-mentioned problem, a method for assembling a bridge moving work device according to the first aspect of the present invention includes a first step of installing a moving work vehicle on the upper surface of a column head of a pier, A second step of assembling all or part of the suspended floor structure in a vertical posture along the pier, a first suspension member lowered from a fixed position on the column head, and a second suspension lowered from the mobile work vehicle A third step of lifting the suspended floor structure with a material, and the third step adjusts the feed length of the first and second suspension members and the amount of movement of the mobile work vehicle. Accordingly, the present invention includes a rotating and lifting step of rotating the suspended floor structure in the vertical position to a horizontal position and lifting the suspended floor structure to a predetermined position below the pillar head.

本態様によれば、移動作業車に吊持ちされる吊り床構造体を橋脚に沿わせた縦姿勢で組み立て、更に第１吊り材と第２吊り材の繰出し長さと、前記移動作業車の移動量とを調節することによって前記縦姿勢の吊り床構造体を回動させて横姿勢にし、前記柱頭部下方の所定の位置まで該吊り床構造体を吊り上げる。従って、橋梁の張出し方向の橋脚の下部に吊り床構造体を組立てるのに十分な作業スペースがない場合であっても既存の設備を使用して安全に、短時間で吊り床構造体を組み立てることが可能になる。特に、吊り床構造体の組立て作業中、作業者が組立て途中の吊り床構造体上に乗ることがないから安全性が高く、組立て途中の吊り床構造体の下方には道路等が走っていないから道路の切り回しや通行止め等の交通規制が不要となり交通の利便性を向上させる。 According to this aspect, the suspended floor structure suspended from the mobile work vehicle is assembled in a vertical posture along the bridge pier, and further, the feeding lengths of the first suspension material and the second suspension material, and the movement of the mobile work vehicle By adjusting the amount, the suspended floor structure in the vertical position is rotated to the horizontal position, and the suspended floor structure is lifted to a predetermined position below the column head. Therefore, even if there is not enough work space to assemble the suspended floor structure at the bottom of the pier in the direction of the overhang of the bridge, the suspended floor structure can be assembled safely and quickly using existing equipment. Is possible. In particular, during assembly work of the suspended floor structure, the operator does not get on the suspended floor structure during the assembly process, so safety is high, and no road or the like is running below the suspended floor structure structure during the assembly process. Therefore, traffic regulation such as turning around roads and closing roads becomes unnecessary, improving the convenience of traffic.

本発明の第２の態様は、前記第１の態様の橋梁移動作業装置の組立て方法において、前記回動吊上げ工程は、前記吊り床構造体を前記縦姿勢で所定に高さまで吊上げた後、回動させて前記横姿勢に移行することを特徴とするものである。 According to a second aspect of the present invention, in the method for assembling the bridge moving work device according to the first aspect, the rotating lifting step is performed after the suspension floor structure is lifted up to a predetermined height in the vertical posture. And moving to the horizontal posture.

本態様によれば、吊り床構造体を回動させて縦姿勢から横姿勢に移行するのは、該吊り床構造体がある程度の高さまで吊上げられてからである。従って、橋梁の張出し方向における橋脚下方の作業スペースが極めて狭くて、縦姿勢の吊り床構造体を吊上げると同時に回動すると周囲の物と干渉してしまう場合でも、そのような干渉の問題なく組み立てることができる。 According to this aspect, the suspension floor structure is rotated to shift from the vertical posture to the horizontal posture after the suspension floor structure is lifted to a certain height. Therefore, even if the work space below the pier in the direction of the bridge extension is extremely narrow and the suspended floor structure in the vertical position is lifted and rotated at the same time, it may interfere with surrounding objects without such problems. Can be assembled.

本発明の第３の態様は、前記第１の態様又は第２の態様の橋梁移動作業装置の組立て方法において、前記縦姿勢の吊り床構造体における下端側を、前記移動作業車の移動方向における前方に対して後方側に引き上げるように回動させて前記横姿勢に移行することを特徴とするものである。 According to a third aspect of the present invention, in the method for assembling the bridge moving work device according to the first aspect or the second aspect, the lower end side of the suspended floor structure in the vertical posture is set in the moving direction of the mobile work vehicle. It is characterized in that it shifts to the rear side with respect to the front and shifts to the lateral posture.

本態様によれば、縦姿勢の吊り床構造体における下端側を、前記移動作業車の移動方向における前方に対して後方側に引き上げるように回動させて前記横姿勢に移行するので、橋脚前方に位置する法面や道路等と吊り床構造体との干渉が防止される。 According to this aspect, since the lower end side of the suspended floor structure in the vertical posture is rotated so as to be pulled rearward with respect to the front in the moving direction of the mobile work vehicle, it shifts to the horizontal posture. Interference between the slopes, roads, etc. located on the floor and the suspended floor structure is prevented.

本発明の第４の態様に係る橋梁移動作業装置の解体方法は、吊り床構造体が橋脚の柱頭部上面にある移動作業車に吊持ちされている状態から前記柱頭部における固定位置から下げられる第１吊り材及び前記移動作業車から下げられる第２吊り材とによって吊り持ちされる状態に移行する解体第１工程と、前記第１吊り材及び第２吊り材によって前記吊り床構造体を吊り降ろす解体第２工程とを有し、前記解体第２工程は、前記第１吊り材と第２吊り材の繰出し長さと、前記移動作業車の移動量とを調節することによって前記横姿勢の吊り床構造体を回動させて縦姿勢にし、前記橋脚下部の所定の位置まで該吊り床構造体を降ろす回動吊降ろし工程を含むことを特徴とするものである。 In the dismantling method of the bridge moving work device according to the fourth aspect of the present invention, the suspended floor structure is lowered from the fixed position at the column head from the state where the suspended floor structure is suspended by the mobile work vehicle on the top of the column head of the bridge pier. A dismantling first step of transitioning to a state suspended by a first suspension member and a second suspension member lowered from the mobile work vehicle, and the suspension floor structure is suspended by the first suspension member and the second suspension member. A dismantling second step of unloading, and the disassembling second step includes adjusting the feeding length of the first suspension member and the second suspension member and the amount of movement of the mobile work vehicle to suspend the lateral posture. The floor structure is rotated to a vertical posture, and includes a rotating and hanging step of lowering the suspended floor structure to a predetermined position below the pier.

本態様によれば、前記吊り床構造体を横姿勢から縦姿勢に移行することで、橋梁の張出し方向の橋脚の下部に吊り床構造体を解体するのに十分な作業スペースがない場合であっても、橋脚近くの狭いスペースを利用して安全に、短時間で吊り床構造体を解体することが可能になる。特に、吊り床構造体の解体作業中、作業者が解体途中の吊り床構造体上に乗ることがないから安全性が高く、解体途中の吊り床構造体の下方には道路等が走っていないから道路の切り回しや通行止め等の交通規制が不要となり交通の利便性を向上させる。 According to this aspect, when the suspended floor structure is shifted from the horizontal position to the vertical position, there is no sufficient work space for disassembling the suspended floor structure at the lower part of the bridge pier in the extending direction of the bridge. However, it is possible to dismantle the suspended floor structure safely in a short time using a narrow space near the pier. In particular, during the dismantling work of the suspended floor structure, the operator does not get on the suspended floor structure in the middle of dismantling, so safety is high, and there is no road running below the suspended floor structure in the middle of dismantling. Therefore, traffic regulation such as turning around roads and closing roads becomes unnecessary, improving the convenience of traffic.

本発明の橋梁移動作業装置の組立て方法によれば、橋梁の張出し方向の橋脚の下部に吊り床構造体を組立てるのに十分な作業スペースがない場合であっても既存の設備を使用して安全に、短時間で吊り床構造体を組み立てることが可能になる。また、道路の切り回しや通行止めに伴なう交通規制をなくしたり、交通規制の時間を短くして交通渋滞を防止し、円滑な車両の通行に寄与し得るようになる。 According to the method for assembling the bridge moving work apparatus of the present invention, even if there is not enough work space for assembling the suspended floor structure at the lower part of the bridge pier in the extending direction of the bridge, it is possible to safely use the existing equipment. In addition, the suspended floor structure can be assembled in a short time. In addition, it is possible to eliminate traffic restrictions associated with turning roads and closing roads, or to shorten the traffic regulation time to prevent traffic congestion and contribute to smooth vehicle traffic.

本発明の実施例１に係る橋梁移動作業装置の組立て方法で組み立てられた橋梁移動作業装置の使用状態を示す斜視図。The perspective view which shows the use condition of the bridge movement work apparatus assembled with the assembly method of the bridge movement work apparatus which concerns on Example 1 of this invention. 本発明の実施例１に係る橋梁移動作業装置の組立て方法における吊り床構造体の組立て工程を示す正面図。The front view which shows the assembly process of the suspended floor structure in the assembly method of the bridge movement work apparatus which concerns on Example 1 of this invention. 本発明の実施例１に係る橋梁移動作業装置の組立て方法における吊り床構造体の組立て工程を示す側面図。The side view which shows the assembly process of the suspended floor structure in the assembly method of the bridge movement work apparatus which concerns on Example 1 of this invention. 本発明の実施例１に係る橋梁移動作業装置の組立て方法における吊り床構造体の回動吊上げ工程を示す正面図。The front view which shows the rotation lifting process of the suspended floor structure in the assembly method of the bridge movement operation apparatus which concerns on Example 1 of this invention. 本発明の実施例１に係る橋梁移動作業装置の組立て方法における吊り床構造体の回動吊上げ工程を示す側面図。The side view which shows the rotation lifting process of the suspended floor structure in the assembly method of the bridge moving operation apparatus which concerns on Example 1 of this invention. 本発明の実施例１に係る橋梁移動作業装置の組立て方法における吊り支保工の組立て工程を示す正面図。The front view which shows the assembly process of the suspension support in the assembly method of the bridge movement operation apparatus which concerns on Example 1 of this invention. 本発明の実施例１に係る橋梁移動作業装置の組立て方法における吊り支保工の組立て工程を示す側面図。The side view which shows the assembly process of the suspension support in the assembly method of the bridge movement operation apparatus which concerns on Example 1 of this invention. 本発明の実施例１に係る橋梁移動作業装置の組立て方法における吊り床構造体と吊り支保工の設置工程を示す正面図。The front view which shows the installation process of the suspended floor structure and suspension support in the assembly method of the bridge movement work apparatus which concerns on Example 1 of this invention. 本発明の実施例１に係る橋梁移動作業装置の組立て方法における吊り床構造体と吊り支保工の設置工程を示す側面図。The side view which shows the installation process of the suspended floor structure and suspension support in the assembly method of the bridge movement work apparatus which concerns on Example 1 of this invention. 本発明の実施例１に係る橋梁移動作業装置の組立て方法において使用される吊り床構造体の縦梁の折曲がり状態を示す側面図（Ａ）と、直線状態を示す側面図（Ｂ）。The side view (A) which shows the bending state of the vertical beam of the suspended floor structure used in the assembly method of the bridge moving operation | work apparatus which concerns on Example 1 of this invention, and the side view (B) which shows a linear state. 本発明の実施例１に係る橋梁移動作業装置の組立て方法において使用される吊り床構造体のフレーム構造を示す斜視図。The perspective view which shows the frame structure of the suspended floor structure used in the assembly method of the bridge movement work apparatus which concerns on Example 1 of this invention. 本発明の実施例１に係る橋梁移動作業装置の組立て方法において使用される吊り床構造体のフレーム構造に床板を設置した状態を示す斜視図。The perspective view which shows the state which installed the floor board in the frame structure of the suspended floor structure used in the assembly method of the bridge movement work apparatus which concerns on Example 1 of this invention. 本発明の実施例１に係る橋梁移動作業装置の組立て方法において使用される吊り床構造体を示す斜視図。The perspective view which shows the suspended floor structure used in the assembly method of the bridge movement work apparatus which concerns on Example 1 of this invention. 本発明の実施例２に係る橋梁移動作業装置の組立て方法における吊り床構造体の組立て工程を示す側面図。The side view which shows the assembly process of the suspended floor structure in the assembly method of the bridge movement work apparatus which concerns on Example 2 of this invention. 本発明の実施例２に係る橋梁移動作業装置の組立て方法における吊り床構造体の回動吊上げ工程を示す側面図。The side view which shows the rotation lifting process of the suspended floor structure in the assembly method of the bridge moving operation apparatus which concerns on Example 2 of this invention. 本発明の実施例３に係る橋梁移動作業装置の組立て方法における吊り床構造体の組立て工程を示す側面図。The side view which shows the assembly process of the suspended floor structure in the assembly method of the bridge movement work apparatus which concerns on Example 3 of this invention. 本発明の実施例３に係る橋梁移動作業装置の組立て方法における吊り床構造体の回動工程を示す側面図。The side view which shows the rotation process of the suspended floor structure in the assembly method of the bridge movement work apparatus which concerns on Example 3 of this invention. 本発明の実施例３に係る橋梁移動作業装置の組立て方法における吊り支保工の組立て工程を示す側面図。The side view which shows the assembly process of the suspension supporter in the assembly method of the bridge movement work apparatus which concerns on Example 3 of this invention. 本発明の実施例３に係る橋梁移動作業装置の組立て方法における吊り床構造体と吊り支保工の設置工程を示す側面図。The side view which shows the installation process of the suspended floor structure and suspension support in the assembly method of the bridge moving operation apparatus which concerns on Example 3 of this invention.

以下、本発明に係る橋梁移動作業装置の組立て方法及び解体方法について下記の実施例１〜実施例３及び対応する図面に基づいて具体的に説明する。
最初に、本発明の適用対象である橋梁移動作業装置１の構造の概略について、図１及び図１０〜図１３に基づいて説明する。尚、この橋梁移動作業装置１は、川や海に架かる橋梁２の他、図１に示すように陸地に設けられる自動車道路等の高架橋用の橋梁２の建設に使用される。具体的には、地中Ｇから垂直に立ち上げられた橋脚５の上部に後述する移動作業車２１を設置する柱頭部７を設け、この柱頭部７を基点として橋梁２の張出し方向Ｙに橋梁移動作業車１を移動させながら橋桁９を徐々に張り出させて行くことで橋梁２を建設する。 Hereinafter, a method for assembling and disassembling a bridge moving work device according to the present invention will be described in detail with reference to the following first to third embodiments and corresponding drawings.
First, an outline of the structure of the bridge moving work device 1 to which the present invention is applied will be described with reference to FIGS. 1 and 10 to 13. The bridge moving work device 1 is used for construction of a bridge 2 for a viaduct such as an automobile road provided on land as shown in FIG. 1 in addition to a bridge 2 over a river or the sea. Specifically, a column head 7 for installing a mobile work vehicle 21 to be described later is provided on the upper part of the pier 5 that is vertically raised from the underground G, and the bridge 2 is extended in the extending direction Y of the bridge 2 with the column head 7 as a base point. The bridge 2 is constructed by gradually extending the bridge girder 9 while moving the mobile work vehicle 1.

橋梁移動作業装置１は、橋脚５の柱頭部７の上面にクレーン等によって設置固定される２本のレール１３、１３上を走行する移動作業車２１と、組立て・解体時においてレール下に設けられる横梁１１から吊り下げられる第１吊り材１７と、前記移動作業車２１から吊り下げられる第２吊り材２３と、前記第１吊り材１７と第２吊り材２３とによって吊上げられる吊り床構造体３１と、を具備することによって基本的に構成されている。
また、図示の橋梁移動作業装置１は、前記基本的構成に加えて橋脚５の柱頭部７または張出し架設された橋桁９から吊り下げられる第３吊り材２５（図９）と、前記移動作業車２１から吊り下げられる第４吊り材２７、第５吊り材２９及び第２吊り材２３（図８、図９）と、前記第３吊り材２５と第４吊り材２７とによって吊り上げられる型枠支持用の吊り支保工４３と、を具備することによって構成されている。 The bridge moving work device 1 is provided under two rails 13, 13 that are installed and fixed on the upper surface of the column head 7 of the pier 5 by a crane or the like, and under the rails during assembly / disassembly. A first suspension member 17 suspended from the cross beam 11, a second suspension member 23 suspended from the mobile work vehicle 21, and a suspended floor structure 31 suspended by the first suspension member 17 and the second suspension member 23. Are basically configured.
In addition to the basic configuration, the illustrated bridge moving work device 1 includes a third suspension member 25 (FIG. 9) that is suspended from a column head 7 of the pier 5 or an overhanging bridge girder 9, and the mobile work vehicle. Form support supported by the fourth suspending material 27, the fifth suspending material 29, and the second suspending material 23 (FIGS. 8 and 9), and the third suspending material 25 and the fourth suspending material 27. For example, the suspension support work 43 is provided.

組立て解体時に橋梁移動作業装置１のレール１３、１３の下に位置し、橋梁２の張出し方向Ｙの柱頭部７の前端に位置する横梁１１の左右の両端部に、前述した第１吊り材１７となるチェーンブロックが取り付けられている。
また、前記２本のレール１３、１３は移動作業車２１の左右の車輪４５の間隔に合わせた軌間幅で橋梁２の張出し方向Ｙに延びるように敷設されている。そして、橋梁移動作業装置１の移動に先駆けてその都度前記レール１３、１３は移動固定される。 The first suspension members 17 described above are placed on the left and right ends of the lateral beam 11 located under the rails 13 and 13 of the bridge moving work device 1 during assembly and disassembly and located at the front end of the column head 7 in the extending direction Y of the bridge 2. A chain block is attached.
The two rails 13 and 13 are laid so as to extend in the extending direction Y of the bridge 2 with a gauge width matched to the distance between the left and right wheels 45 of the mobile work vehicle 21. Prior to the movement of the bridge moving work device 1, the rails 13 and 13 are moved and fixed each time.

移動作業車２１は、後方に位置する下桁４７と前方に張り出して位置する上桁４９と、前記下桁４７と上桁４９の前後の両端部付近を接続している２本の傾斜支持枠５１、５１と、を備えるトラス構造の車体フレーム５３と、該車体フレーム５３を走行駆動させるための走行モータ５５及び前記車輪４５とを具備することによって構成されている。
また、前記上桁４９の前端側の位置に前述した第２吊り材２３、第４吊り材２７となる２基のチェーンブロックが設けられており、前記上桁４９の後端側の位置に前述した第５吊り材２９となるチェーンブロックが取り付けられている。 The mobile work vehicle 21 includes a lower girder 47 positioned rearward, an upper girder 49 projecting forward, and two inclined support frames connecting the lower girder 47 and the vicinity of both ends of the front and rear of the upper girder 49. The vehicle body frame 53 having a truss structure including 51 and 51, the travel motor 55 for driving the vehicle body frame 53, and the wheels 45 are provided.
In addition, two chain blocks serving as the above-described second suspension member 23 and fourth suspension member 27 are provided at a position on the front end side of the upper girder 49, and the position on the rear end side of the upper girder 49 is described above. A chain block to be the fifth suspension member 29 is attached.

吊り床構造体３１は、図１１に示すように、橋梁２の幅方向Ｘに沿うように配設される大梁３３、３４と小梁３７とから構成される横梁と、水平に吊り上げられた横姿勢において橋梁２の張出し方向Ｙに沿うように配設される縦梁３５と、を備えることによってフレーム構造５７が構成されている。更に、図１２に示すように前記フレーム構造５７の上面に床板３９を設置し、図１３に示すように当該床板３９の周囲の上方に一例として鋼管等を使用した転落防止用の安全柵４１を取り付けることによって構成されている。 As shown in FIG. 11, the suspended floor structure 31 includes a horizontal beam composed of large beams 33 and 34 and a small beam 37 arranged along the width direction X of the bridge 2, and a horizontal beam suspended horizontally. The frame structure 57 is configured by including the vertical beam 35 disposed along the extending direction Y of the bridge 2 in the posture. Furthermore, as shown in FIG. 12, a floor plate 39 is installed on the upper surface of the frame structure 57, and as shown in FIG. 13, a safety fence 41 for preventing falling is used above the periphery of the floor plate 39 using a steel pipe or the like as an example. It is configured by attaching.

尚、前記フレーム構造５７は、大きさの違う３種類のＨ形鋼等の形鋼材によって構成されている。ここで、水平に吊り上げられた使用時の横姿勢で最も下に位置するのが最も大きな２本の大梁３３、３４、中間において幅方向Ｘに適宜の間隔を空けて一例として７本設けられているのが次に大きな縦梁３５、前記縦梁３５の上に設けられている複数本の小さな梁が小梁３７である。
また、このうち縦梁３５が横姿勢にある時、橋脚５側に位置する縦梁３５の一端側となる一端部３５ａは、図１０（Ａ）に示すように縦梁３５の他の部位３５ｂに対してヒンジ部５９を介して折曲可能に設けられている。 The frame structure 57 is made of a shape steel material such as three types of H-section steel having different sizes. Here, the two large beams 33 and 34 that are positioned at the bottom in the horizontal posture in use when hung horizontally are provided, and seven are provided as an example with an appropriate interval in the width direction X in the middle. The next largest vertical beam 35 and a plurality of small beams provided on the vertical beam 35 are the small beams 37.
Of these, when the vertical beam 35 is in the horizontal posture, one end portion 35a which is one end side of the vertical beam 35 located on the pier 5 side is another portion 35b of the vertical beam 35 as shown in FIG. On the other hand, it can be bent via a hinge part 59.

そして、後述する橋梁移動作業装置１の組立て・解体時には、前記縦梁３５の一端部３５ａを図１０（Ａ）に示す折曲がり状態にして縦梁３５の橋脚５との干渉を防止している。
一方、橋梁移動作業装置１を使用して橋梁２の張出し架設工事を行う場合には、前記縦梁３５の一端部３５ａを図１０（Ｂ）に示す直線状態にして前記一端部３５ａの回動をロック装置６１等によってロックした状態にし、更に、前記一端部３５ａの上に床板３９を設置して床面積の拡大を図っている。 At the time of assembling / disassembling the bridge moving work device 1 to be described later, one end portion 35a of the vertical beam 35 is bent as shown in FIG. 10A to prevent interference with the bridge pier 5 of the vertical beam 35. .
On the other hand, when the bridge moving work device 1 is used to carry out the overhang construction work of the bridge 2, the one end portion 35a of the vertical beam 35 is turned into the straight state shown in FIG. Is locked by a locking device 61 or the like, and a floor plate 39 is installed on the one end 35a to increase the floor area.

また、図２、図３に示したように、前記第１吊り材１７のチェーンの下端部は、前記吊り床構造体３１が後述するように縦姿勢にある時、吊り床構造体３１の重心Ｏの上方に位置する大梁３３から延びる第１吊り支点Ｐ１に接続されている。
一方、前記第２吊り材２３のチェーンの下端部は、前記吊り床構造体３１が後述するように縦姿勢にある時、吊り床構造体３１の重心Ｏの下方に位置する大梁３４から延びる第２吊り支点Ｐ２に接続されている。 As shown in FIGS. 2 and 3, the lower end of the chain of the first suspension member 17 has a center of gravity of the suspended floor structure 31 when the suspended floor structure 31 is in a vertical position as will be described later. It is connected to a first suspension fulcrum P1 extending from the large beam 33 located above O.
On the other hand, the lower end portion of the chain of the second suspension member 23 extends from a large beam 34 positioned below the center of gravity O of the suspension floor structure 31 when the suspension floor structure 31 is in a vertical posture as will be described later. 2 It is connected to the suspension fulcrum P2.

この他、前記吊り支保工４３は、橋桁９の架設時に鉄筋や打設されるコンクリートの充填空間を囲って所定の形状の橋桁９を成形する型枠の支持架台として機能する部材である。
そして、前記吊り支保工４３は、前述したように第３吊り材２５と第４吊り材２７とによって柱頭部７の下方の所定の位置Ｃに吊り上げられて保持される。 In addition, the suspension support 43 is a member that functions as a support frame for a formwork that forms a bridge girder 9 having a predetermined shape surrounding a reinforcing space and a concrete filling space to be placed when the bridge girder 9 is erected.
The suspension support 43 is lifted and held at a predetermined position C below the column head 7 by the third suspension member 25 and the fourth suspension member 27 as described above.

次に、このようにして構成される橋梁移動作業装置１を使用するために組み立てたり、橋梁２の完成後、前記橋梁移動作業装置１を解体する場合に実施される本発明の橋梁移動作業装置の組立て方法及び解体方法を下記に示す実施例１〜実施例３によって説明する。 Next, the bridge moving work apparatus according to the present invention is implemented when the bridge moving work apparatus 1 configured as described above is assembled to be used or the bridge moving work apparatus 1 is disassembled after the bridge 2 is completed. The assembling method and the disassembling method will be described with reference to Examples 1 to 3 shown below.

［実地例１］（図２〜図９参照）
実施例１に係る橋梁移動作業装置の組立てにおいては、前記吊り床構造体３１の組立てを橋脚５に沿わせた縦姿勢で行い、その後前記第１吊り材１７と第２吊り材２３のチェーンの繰出し長さと、前記移動作業車２１の移動方向及び移動量とを調節することによって前記吊り床構造３１を橋梁２の張出し方向Ｙの前方に回動させて横姿勢にし、柱頭部７下方の所定の位置Ｂまで吊り上げるようにする。 [Practical example 1] (See FIGS. 2 to 9)
In the assembly of the bridge moving work device according to the first embodiment, the suspension floor structure 31 is assembled in a vertical posture along the pier 5 and then the chain of the first suspension member 17 and the second suspension member 23 is assembled. By adjusting the feeding length and the moving direction and moving amount of the mobile work vehicle 21, the suspended floor structure 31 is rotated to the front in the extending direction Y of the bridge 2 to be in a horizontal position, and a predetermined position below the column head 7. Lift to position B.

また、前記吊り床構造体３１を柱頭部７の下方の所定の位置Ｂまで吊り上げた後、前記第５吊り材２９を前記吊り床構造体３１に接続し、その後前記第１吊り材１７と前記吊り床構造体３１との接続を解除するとともに、前記第３吊り材２５と第４吊り材２７とを使用して前記吊り支保工４３を柱頭部７の下方の所定の位置Ｃまで吊り上げる。 Further, after the suspended floor structure 31 is lifted to a predetermined position B below the column head 7, the fifth suspension material 29 is connected to the suspended floor structure 31, and then the first suspension material 17 and the The connection with the suspension floor structure 31 is released, and the suspension support 43 is lifted to a predetermined position C below the column head 7 using the third suspension member 25 and the fourth suspension member 27.

一方、橋梁移動作業装置１の解体に当たっては、前記と逆の手順で吊り支保工４３を吊り床構造体３１上に降ろし、前記第１吊り材１７を前記吊り床構造体３１に接続した後、前記第５吊り材２９と前記吊り床構造体３１との接続を解除する。
そして、前記組み立てた吊り床構造体３１を柱頭部７下方の所定の位置Ｂから橋脚５の下部の組立て・解体位置Ａ付近まで下降させ、その後前記第１吊り材１７と第２吊り材２３の繰出し長さと、前記移動作業車２１の移動方向及び移動量とを調節することによって前記吊り床構造体３１を橋梁２の張出し方向Ｙの後方となる橋脚５側に回動させて縦姿勢にし、前記吊り床構造体３１の解体を前記橋脚５に沿わせた縦姿勢で行うようにする。 On the other hand, in dismantling the bridge moving work device 1, the suspension support 43 is lowered onto the suspended floor structure 31 in the reverse procedure to that described above, and the first suspended material 17 is connected to the suspended floor structure 31. The connection between the fifth suspension member 29 and the suspended floor structure 31 is released.
Then, the assembled suspended floor structure 31 is lowered from a predetermined position B below the column head 7 to the vicinity of the assembly / disassembly position A below the bridge pier 5, and then the first suspension material 17 and the second suspension material 23. By adjusting the feeding length and the moving direction and moving amount of the mobile work vehicle 21, the suspended floor structure 31 is rotated to the pier 5 side behind the extending direction Y of the bridge 2 to be in a vertical posture. The suspension floor structure 31 is disassembled in a vertical posture along the pier 5.

次に、実施例１に係る橋梁移動作業装置の組立て方法及び解体方法について、組立て時の各工程である（１）吊り床構造体の組立て工程、（２）吊り床構造体の回動吊上げ工程、（３）吊り支保工の組立て工程、（４）吊り床構造体と吊り支保工の設置工程の４工程に分けて具体的に説明する。
（１）吊り床構造体の組立て工程（図２、図３、図１０〜図１３参照）
吊り床構造体の組立て工程は、吊り床構造体３１を構成する大梁３３、３４、縦梁３５、小梁３７からなるフレーム構造５７の組み立てと、床板３９の設置と、安全柵４１の取り付けを立設状態で実行する工程である。この工程は、橋脚５の柱頭部７の上面に移動作業車２１を設置する第１工程とは別に行われる。 Next, regarding the assembling method and the disassembling method of the bridge moving work apparatus according to the first embodiment, (1) the assembling process of the suspended floor structure, and (2) the rotating lifting process of the suspended floor structure, which are the steps at the time of assembling. (3) The assembly process of the suspension support work, (4) The process will be specifically described by dividing into 4 processes of the suspension floor structure and the suspension support work installation process.
(1) Assembling process of suspended floor structure (see FIGS. 2, 3, and 10 to 13)
The assembly process of the suspended floor structure includes assembling the frame structure 57 composed of the large beams 33 and 34, the longitudinal beams 35 and the small beams 37 constituting the suspended floor structure 31, installing the floor plate 39, and attaching the safety fence 41. It is a process executed in a standing state. This step is performed separately from the first step of installing the mobile work vehicle 21 on the upper surface of the column head 7 of the pier 5.

具体的には、橋脚５に沿って橋脚５の下部に昇降足場１９と組立て・解体用足場２０を設置する。昇降足場１９と組立て・解体用足場２０の設置高さは、作業者が所定の組立て・解体位置Ａに進入できる高さとする。
次に、クレーン等を使用して例えば大梁３３、３４、縦梁３５、小梁３７の順で吊り上げ、図２、図３に示すように縦姿勢でフレーム構造５７を組立て・解体用足場２０で支えながら組み立てて行く。続いて床板３９を小梁３７の上面に設置し、更に、鋼管とジョイント金具等を使用して前記床板３９の周囲に安全柵４１を取り付ける。以上が第２工程である。 Specifically, an elevating scaffold 19 and an assembly / dismantling scaffold 20 are installed along the pier 5 below the pier 5. The installation height of the lifting / lowering scaffold 19 and the assembly / disassembly scaffold 20 is set to a height at which an operator can enter a predetermined assembly / disassembly position A.
Next, using a crane or the like, for example, the large beams 33 and 34, the vertical beams 35, and the small beams 37 are lifted in this order, and the frame structure 57 is assembled in the vertical posture as shown in FIGS. Assemble while supporting. Subsequently, the floor board 39 is installed on the upper surface of the small beam 37, and a safety fence 41 is attached around the floor board 39 using a steel pipe and a joint metal fitting. The above is the second step.

次に、柱頭部７上の横梁１１に取り付けられている第１吊り材１７のチェーンを下方に繰り出し、当該チェーン先端のフックを上方に位置する大梁３３から延びている第１吊り支点Ｐ１に掛けて接続する。
同様に、レール１３、１３の後方位置に存する移動作業車２１の上桁４９に取り付けられている第２吊り材２３のチェーンを下方に繰り出し、当該チェーン先端のフックを下方に位置する大梁３４から延びている第２吊り支点Ｐ２に掛けて接続する。
また、前記縦梁３５のうち、次に述べる吊り床構造体３１の回動時に橋脚５と干渉する虞れがある縦梁３５については、図１０（Ａ）に示すようにロック装置６１のロックを解除して縦梁３５の一端部３５ａを折曲げた状態にしておく。 Next, the chain of the first suspension member 17 attached to the horizontal beam 11 on the column head 7 is drawn downward, and the hook at the tip of the chain is hung on the first suspension fulcrum P1 extending from the large beam 33 located above. Connect.
Similarly, the chain of the second suspension member 23 attached to the upper girder 49 of the mobile work vehicle 21 located behind the rails 13 and 13 is drawn downward, and the hook at the tip of the chain is extended from the large beam 34 located below. It is hung and connected to the extended second fulcrum P2.
Of the vertical beams 35, the vertical beams 35 that may interfere with the pier 5 when the suspended floor structure 31 described below is rotated are locked by the lock device 61 as shown in FIG. Is released and the one end portion 35a of the vertical beam 35 is bent.

（２）吊り床構造体の回動吊上げ工程（図４〜図７参照）
吊り床構造体の回動吊上げ工程は、前記吊り床構造体の組立て工程（第２工程）によって組み立てられた縦姿勢の吊り床構造体３１を、前記第１吊り材１７と第２吊り材２３の繰出し長さと、前記移動作業車２１の移動方向及び移動量とを調節することによって回動させて横姿勢にする工程である。 (2) Rotating lifting process of suspended floor structure (see FIGS. 4 to 7)
In the rotating lifting process of the suspended floor structure, the suspended floor structure 31 in the vertical posture assembled in the suspended floor structure assembly process (second process) is replaced with the first suspended material 17 and the second suspended material 23. This is a step of adjusting the feeding length and the moving direction and moving amount of the mobile work vehicle 21 to a horizontal posture.

具体的には、前工程で設置した組立て・解体用足場２０を切り離した後、前記第１吊り材１７のチェーンの繰出し長さをそのままにした状態で、前記第２吊り材２３のチェーンを徐々に引き上げながら移動作業車２１を橋梁２の張出し方向Ｙの前方へ徐々に前進させるようにする。
前記第２吊り材２３と移動作業車２１の動作に伴ない、吊り床構造体３１は、図５に示すように第１吊り支点Ｐ１を中心にして橋梁２の張出し方向Ｙの前方に向って図５中、反時計方向に回動するようになる。
そして、図７に示す位置まで第２吊り材２３のチェーンを引き上げ、移動作業車２１を前進させると、第１吊り支点Ｐ１と第２吊り支点Ｐ２が同一水平面上に位置するようになって、前記吊り床構造体３１の回動が終了する。 Specifically, after the assembly / disassembly scaffold 20 installed in the previous process is cut off, the chain of the second suspension member 23 is gradually put in a state where the length of the chain of the first suspension member 17 remains unchanged. The mobile work vehicle 21 is gradually advanced forward in the extending direction Y of the bridge 2 while being pulled up.
Along with the movement of the second suspension member 23 and the mobile work vehicle 21, the suspended floor structure 31 is directed forward in the extending direction Y of the bridge 2 around the first suspension fulcrum P1 as shown in FIG. In FIG. 5, it turns counterclockwise.
Then, when the chain of the second suspension member 23 is pulled up to the position shown in FIG. 7 and the mobile work vehicle 21 is advanced, the first suspension fulcrum P1 and the second suspension fulcrum P2 are located on the same horizontal plane, The rotation of the suspended floor structure 31 ends.

（３）吊り支保工の組立て工程（図６、図７参照）
吊り支保工の組立て工程は、前記吊り床構造体３１の縦姿勢からの回動によって横姿勢に移行した吊り床構造体３１上で前記型枠の支持架台となる吊り支保工４３を組み立てる工程である。
即ち、本実施例では、吊り床構造体３１には床板３９が設置され、安全柵４１が取り付けられているから、前記（１）の吊り床構造体の組立て工程で使用した組立て・解体用足場２０または併設する昇降足場１９を使用して、作業者は吊り床構造体３１上に進入し、安全に吊り支保工４３の組み立てを行うことができる。また、前記吊り支保工４３と併せて吊り支保工４３の設置の際に使用する足場材等も予め吊り床構造体３１上に取り込んでおく。 (3) Assembly process of suspension support (see Figs. 6 and 7)
The assembly process of the suspension support work is a process of assembling the suspension support work 43 serving as a support frame for the formwork on the suspension floor structure 31 that has shifted to the horizontal position by the rotation of the suspension floor structure 31 from the vertical position. is there.
That is, in this embodiment, since the floor board 39 is installed on the suspended floor structure 31 and the safety fence 41 is attached, the assembly / disassembly scaffold used in the assembly process of the suspended floor structure of (1) above. The operator can enter the suspended floor structure 31 and assemble the suspension support work 43 safely using the lifting platform 19 or the lifting scaffold 19 provided therewith. In addition to the suspension support 43, scaffolding materials and the like used when installing the suspension support 43 are also taken in the suspension floor structure 31 in advance.

（４）吊り床構造体と吊り支保工の設置工程（図８〜図１０参照）
吊り床構造体と吊り支保工の設置工程は、横姿勢に移行した吊り床構造体３１を吊り床構造体３１上で組み立てられた吊り支保工４３等と共に上方に引き上げ、前記吊り床構造体３１と前記吊り支保工４３とを柱頭部７下方の所定の位置Ｂ、Ｃに至らせて保持する工程である。
具体的には、第１吊り材１７と第２吊り材２３のチェーンを同一速度で引き上げて行き、吊り床構造体３１を柱頭部７下方の所定の位置Ｂに至らせる。 (4) Installation process of suspension floor structure and suspension support (see FIGS. 8 to 10)
In the installation process of the suspended floor structure and the suspended support structure, the suspended floor structure 31 that has shifted to the horizontal posture is lifted upward together with the suspended support structure 43 and the like assembled on the suspended floor structure 31, and the suspended floor structure 31. And the suspension support work 43 are brought to predetermined positions B and C below the column head 7 and held.
Specifically, the chain of the first suspension member 17 and the second suspension member 23 is pulled up at the same speed, and the suspended floor structure 31 is brought to a predetermined position B below the column head 7.

次に、移動作業車２１の上桁４９に取り付けられている第５吊り材２９の先端を前記吊り床構造体３１に接続し、その後前記第１吊り材１７と前記吊り床構造体３１との接続を解除する。尚、この状態では前記吊り床構造体３１は、移動作業車２１のみと接続された状態になり、移動作業車２１と一体になって橋梁２の張出し方向Ｙに向けて吊り床構造体３１は移動できるようになる。
また、前記橋脚５の柱頭部７から吊り下げられている第３吊り材２５と、前記移動作業車２１から吊り下げられている第４吊り材２７とを前記工程で組み立てた吊り支保工４３に接続し、第３吊り材２５と第４吊り材２７を柱頭部７下方の所定の位置Ｃまで引き上げて固定する。 Next, the tip of the fifth suspension material 29 attached to the upper girder 49 of the mobile work vehicle 21 is connected to the suspension floor structure 31, and then the first suspension material 17 and the suspension floor structure 31 are connected. Disconnect. In this state, the suspended floor structure 31 is connected only to the mobile work vehicle 21, and the suspended floor structure 31 is integrated with the mobile work vehicle 21 toward the extending direction Y of the bridge 2. You can move.
Further, a third suspension member 25 suspended from the column head 7 of the pier 5 and a fourth suspension member 27 suspended from the mobile work vehicle 21 are assembled to a suspension support 43 assembled in the above-described process. The third suspension member 25 and the fourth suspension member 27 are pulled up to a predetermined position C below the column head 7 and fixed.

そして、昇降足場１９を上方に向けて図９に示すように増設して行き、前記所定の位置Ｂに設置した吊り床構造体３１の床板３９の上面に到達できるようにする。
以上で橋梁移動作業装置１の一連の組立て作業が終了し、上記吊り支保工４３を使用して型枠６３を柱頭部７の張出し方向Ｙにおける隣接する位置に設置し、鉄筋を組立て、コンクリートを打設し、所定ピッチずつ橋桁９を形成して行く。 Then, as shown in FIG. 9, the lifting and lowering scaffold 19 is increased as shown in FIG. 9 so as to reach the upper surface of the floor plate 39 of the suspended floor structure 31 installed at the predetermined position B.
With the above, a series of assembling work of the bridge moving work device 1 is completed, and using the suspension support work 43, the formwork 63 is installed at an adjacent position in the extending direction Y of the column head 7, the rebar is assembled, and the concrete is The bridge girder 9 is formed by a predetermined pitch.

前記橋梁移動作業装置１の移動に伴って吊り床構造体３１の縦梁３５と橋脚５との干渉は生じなくなるから、図１０（Ａ）に示すように折曲がり状態であった縦梁３５の一端部３５ａを図１０（Ｂ）に示すように直線状態にしてロック装置６１で固定することができ、この上に床板３９を増設すれば吊り床構造体３１の床面積を拡大することができる。 As the bridge moving work device 1 moves, the vertical beam 35 of the suspended floor structure 31 and the bridge pier 5 do not interfere with each other. Therefore, as shown in FIG. As shown in FIG. 10 (B), the one end portion 35a can be fixed in a straight line by the lock device 61, and the floor area of the suspended floor structure 31 can be increased by adding a floor plate 39 thereon. .

また橋梁２の張出し架設が完了したら、橋梁移動作業装置１を橋梁２の張出し方向Ｙの後方に向けて移動させ、架設を始めた当初の柱頭部７上に位置させる。以下、橋梁移動作業装置１を組み立てた前記手順と反対の手順で橋梁移動作業装置１を解体し、完成した橋梁２上の横梁１１、レール１３、１３及び移動作業車２１を撤去すれば、一連の橋梁２の張出し架設工事が完了する。 When the extension construction of the bridge 2 is completed, the bridge moving work device 1 is moved rearward in the extension direction Y of the bridge 2 and is positioned on the original column head 7 where the construction has started. Hereinafter, if the bridge moving work device 1 is disassembled in a procedure opposite to the procedure for assembling the bridge moving work device 1 and the transverse beams 11, rails 13 and 13 and the moving work vehicle 21 on the completed bridge 2 are removed, The overhanging construction of the bridge 2 is completed.

そして、このようにして構成される実施例１に係る橋梁移動作業装置の組立て方法及び解体方法によれば、橋梁２の張出し方向Ｙにおける橋脚５の下方の限られた作業スペースを利用して既存の設備のみを使用して安全に、短時間で且つ低コストで橋梁移動作業装置１の組立て及び解体作業を実行することができる。
また、本実施例では、作業者が組立て途中の吊り床構造体３１上に乗ることなく吊り床構造体３１を組立てることができるから安全であり、転落防止用のネット等の設置を省略することができる。 And according to the assembling method and the dismantling method of the bridge moving work apparatus according to the first embodiment configured as described above, the existing work is performed using the limited work space below the pier 5 in the extending direction Y of the bridge 2. Assembling and dismantling work of the bridge moving work device 1 can be executed safely, in a short time and at a low cost, using only the above equipment.
Further, in this embodiment, since the suspended floor structure 31 can be assembled without the operator getting on the suspended floor structure 31 in the middle of the assembly, it is safe and the installation of a net or the like for preventing fall is omitted. Can do.

また、第１吊り材１７と第２吊り材２３の繰出し長さの調節と移動作業車２１の前方への１回の移動のみによって吊り床構造体３１の回動と所定の位置Ｂへの引き上げが実行できるから、短時間で橋梁移動作業装置１の組立てと設置を完了させることができる。
また、橋梁２の張出し方向Ｙに道路６５が存在している場合には、交通の安全を確保するために行う道路６５の切り回しや通行止めが不要になり、短時間ないし短期間で交通規制を解除することができるようになる。 Further, the suspension floor structure 31 is rotated and pulled up to a predetermined position B only by adjusting the feeding lengths of the first suspension member 17 and the second suspension member 23 and moving the mobile work vehicle 21 forward once. Therefore, the assembly and installation of the bridge moving work device 1 can be completed in a short time.
In addition, when the road 65 exists in the direction Y of the bridge 2, it is not necessary to turn the road 65 or close the road to ensure traffic safety, and traffic regulation can be performed in a short or short period of time. It can be released.

この他、本実施例によれば、棧橋で施工する場合のように海や河川の水面上等作業スペースが確保できない場所でも吊り床構造体３１を安全に組み立てることができる。
また、本実施例によれば、橋梁２の張出し方向Ｙの橋脚５の前方に吊り床構造体３１を縦姿勢で組み立てることができる僅かな作業スペースがあればよく、前記橋脚５の前方に急斜面等がある場合に必要になる吊り床構造体３１の下方に設置する安全足場も不要となる。 In addition, according to the present embodiment, the suspended floor structure 31 can be safely assembled even in a place where a work space such as on the surface of the sea or river cannot be secured as in the case of construction with a bridge.
Further, according to the present embodiment, it is sufficient that there is a small work space in which the suspended floor structure 31 can be assembled in a vertical posture in front of the pier 5 in the extending direction Y of the bridge 2, and a steep slope is in front of the pier 5 Therefore, a safety scaffold installed below the suspended floor structure 31 that is necessary in the case where there is, for example, is also unnecessary.

［実施例２］（図１４〜図１５、図９参照）
実施例２に係る橋梁移動作業装置の組立て方法及び解体方法は、橋脚５の前方に組み立てた吊り床構造体３１を回動させるための回動スペースがない場合に採用できる工法である。
即ち、この工法では、前記実施例１と吊り床構造体３１の回動方向を反対にしている。本実施例では、移動作業車２１を実施例１と同じく前進させながら実施例１と吊り床構造体３１の回動方向を反対にする。それを実現するために、吊り床構造体３１を縦姿勢にして組み立てる際に、該吊り床構造体３１の向きが前記実施例１と逆になる。すなわち、図１４に示したように、橋脚５と対向する面と反対側に大梁３３、３４が位置し、以下、橋脚５側に向って縦梁３５、小梁３７、板材３９及び安全柵４１が位置するようになっている。 [Example 2] (See FIGS. 14 to 15 and FIG. 9)
The assembling method and the disassembling method of the bridge moving work device according to the second embodiment are methods that can be employed when there is no rotation space for rotating the suspended floor structure 31 assembled in front of the pier 5.
That is, in this construction method, the rotating directions of the first embodiment and the suspended floor structure 31 are reversed. In the present embodiment, the moving work vehicle 21 is advanced in the same manner as in the first embodiment, and the rotation direction of the suspended floor structure 31 is reversed from that in the first embodiment. In order to realize this, when the suspended floor structure 31 is assembled in a vertical posture, the direction of the suspended floor structure 31 is opposite to that of the first embodiment. That is, as shown in FIG. 14, the large beams 33 and 34 are located on the opposite side of the surface facing the pier 5, and hereinafter, the vertical beams 35, the small beams 37, the plate material 39, and the safety fence 41 toward the pier 5 side. Is supposed to be located.

以下、実施例２に係る橋梁移動作業装置の組立て方法及び解体方法について、組立て時の各工程である（１）吊り床構造体の組立て工程、（２）吊り床構造体の回動吊上げ工程の２工程について具体的に説明する。 Hereinafter, with respect to the assembly method and the disassembly method of the bridge moving work device according to the second embodiment, (1) the assembly process of the suspended floor structure, (2) the rotational lifting process of the suspended floor structure, which are the respective processes at the time of assembly The two steps will be specifically described.

（１）吊り床構造体の組立て工程（図１４参照）
本工程では、移動作業車２１がレール１３、１３上において実施例１とほぼ同じ位置で停止している。
また、吊り床構造体３１を縦姿勢にして組み立てる位置は、前記実施例１よりも幾分、張出し方向Ｙの前方に移動しており、これに伴って組立て・解体用足場２０も張出し方向Ｙの前方に幾分、移動した位置に設置される。 (1) Assembly process of suspended floor structure (see FIG. 14)
In this step, the mobile work vehicle 21 is stopped on the rails 13 and 13 at substantially the same position as in the first embodiment.
Further, the position where the suspended floor structure 31 is assembled in the vertical position has moved somewhat forward in the overhanging direction Y as compared with the first embodiment, and as a result, the assembly / disassembly scaffold 20 also extends in the overhanging direction Y. It is installed at a position somewhat moved in front of.

また、後述するように組み立てた吊り床構造体３１を前記実施例１と反対方向に回動させることになるため、吊り床構造体３１の向きが前記実施例１と逆になり、橋脚５と対向する面と反対側に大梁３３、３４が位置し、以下、橋脚５側に向って縦梁３５、小梁３７、板材３９及び安全柵４１が位置するようになっている。
更に、前記第１吊り材１７のチェーンの下端部は第２吊り支点Ｐ２に接続され、第２吊り材２３のチェーンの下端部は第１吊り支点Ｐ１に接続されている。 Further, since the suspended floor structure 31 assembled as described later is rotated in the opposite direction to that of the first embodiment, the direction of the suspended floor structure 31 is opposite to that of the first embodiment, and the pier 5 Large beams 33 and 34 are positioned on the opposite side of the facing surface, and hereinafter, vertical beams 35, small beams 37, plate members 39, and safety fences 41 are positioned toward the pier 5 side.
Further, the lower end portion of the chain of the first suspension member 17 is connected to the second suspension support point P2, and the lower end portion of the chain of the second suspension member 23 is connected to the first suspension support point P1.

（２）吊り床構造体の回動吊上げ工程（図１５参照）
本工程では、移動作業車２１を徐々に前進させると同時に第２吊り材２３のチェーンをそのままして第１吊り材１７のチェーンを徐々に引き上げて行く。これに伴なって、組み立てられた吊り床構造体３１は、第２吊り材２３との接続点である第１吊り支点Ｐ２を中心に図１５中、時計方向に回動するようになり、更に横姿勢に吊り床構造体３１が移行したところで、前記移動作業車２１の前進と第１吊り材１７の引き上げは停止される。
また、前記組立て・解体用足場２０は、前記実施例１と同様、前工程終了後に切り離しておき、本工程の吊り床構造体３１の回動に支障がないようにしておく。 (2) Rotating lifting process of suspended floor structure (see FIG. 15)
In this step, the mobile work vehicle 21 is gradually advanced, and at the same time, the chain of the first suspension material 17 is gradually pulled up while the chain of the second suspension material 23 is left as it is. Along with this, the assembled suspended floor structure 31 rotates in the clockwise direction in FIG. 15 around the first suspension fulcrum P2 that is a connection point with the second suspension member 23, and When the suspended floor structure 31 shifts to the horizontal posture, the forward movement of the mobile work vehicle 21 and the lifting of the first suspension member 17 are stopped.
Further, the assembly / disassembly scaffold 20 is separated after the previous process, so as not to hinder the rotation of the suspended floor structure 31 in this process, as in the first embodiment.

その後の（３）吊り支保工の組立て工程と（４）吊り床構造体と吊り支保工の設置工程は実施例１と同様なので、その説明は省略する。
そして、このようにして構成される実施例２に係る橋梁移動作業装置の組立て方法及び解体方法によっても前述した実施例１と同様の作用、効果が発揮される。 Since the subsequent (3) assembly process of the suspension support and (4) the installation process of the suspended floor structure and the suspension support are the same as those in the first embodiment, the description thereof is omitted.
The same operations and effects as those of the first embodiment described above are also exhibited by the assembly method and the disassembly method of the bridge moving work device according to the second embodiment configured as described above.

尚、実施例２では、移動作業車２１を実施例１と同じく前進させながら吊り床構造体３１の回動方向を実施例１と反対にする方法を説明した。しかし、移動作業車２１の移動方向を反対にし、すなわち移動作業車２１を徐々に後退させながら前記吊り材１７，２３を適宜引き上げることで縦姿勢の吊り床構造体３１を横姿勢に移行させる方法も可能である。 In the second embodiment, the method of reversing the rotation direction of the suspended floor structure 31 from that of the first embodiment while moving the mobile work vehicle 21 forward as in the first embodiment has been described. However, the moving direction of the mobile work vehicle 21 is reversed, that is, the suspension work structure 21 in the vertical posture is shifted to the horizontal posture by appropriately lifting the suspension members 17 and 23 while gradually moving the mobile work vehicle 21 backward. Is also possible.

［実施例３］（図１６〜図１９参照）
実施例３に係る橋梁移動作業装置の組立て方法及び解体方法は、橋脚５の前方に吊り床構造体３１の全部を平置きして組み立てることができるだけの作業スペースはないが、吊り床構造体３１の一部を平置きして組み立てることができる作業スペースがある場合に採用できる工法である。
即ち、この工法では、吊り床構造体３１の一部３１Ａの組み立てを橋脚５の前方の作業スペースで行い、組み立てた吊り床構造体３１の一部３１Ａを所定の組立て・解体位置Ａ１まで引き上げた後、吊り床構造体３１の残りの部分３１Ｂを前記実施例１と同様に縦姿勢で組み立てるようにしている。 [Example 3] (See FIGS. 16 to 19)
The assembling method and the disassembling method of the bridge moving work device according to the third embodiment do not have a work space that can be assembled by placing the entire suspended floor structure 31 in front of the pier 5, but the suspended floor structure 31. This method can be used when there is a work space where a part of the work can be assembled flat.
That is, in this construction method, the part 31A of the suspended floor structure 31 is assembled in the work space in front of the pier 5 and the part 31A of the assembled suspended floor structure 31 is pulled up to a predetermined assembly / disassembly position A1. Thereafter, the remaining portion 31B of the suspended floor structure 31 is assembled in a vertical posture in the same manner as in the first embodiment.

以下、実施例３に係る橋梁移動作業装置の組立て方法及び解体方法について、組立て時の各工程である（１）吊り床構造体の組立て工程、（２）吊り床構造体の回動吊り上げ工程、（３）吊り支保工の組立て工程、（４）吊り床構造体と吊り支保工の設置工程の４工程に分けて具体的に説明する。 Hereinafter, assembling method and disassembling method of the bridge moving work device according to the third embodiment, (1) assembling process of the suspended floor structure, (2) rotating lifting process of the suspended floor structure, which is each process during assembly, This will be described in detail by dividing it into four steps: (3) assembly process of suspension support, and (4) installation process of suspension floor structure and suspension support.

（１）吊り床構造体の組立て工程（図１６参照）
本工程では、最初に橋脚５の前方の作業スペースを使用して平置き状態で吊り床構造体３１の一部３１Ａの組み立てを行う。そして、組み立てられた吊り床構造体３１の一部３１Ａに第１吊り材１７を接続して所定の組立て・解体位置Ａ１まで第１吊り材１７を引き上げることによって移動させる。
そして、昇降足場１９と組立て・解体用足場２０とを使用して縦姿勢で吊り床構造体３１の残りの部分３１Ｂを組み立てる。 (1) Assembly process of suspended floor structure (see FIG. 16)
In this step, first, a part 31A of the suspended floor structure 31 is assembled in a flat state using the work space in front of the pier 5. Then, the first suspension member 17 is connected to a part 31A of the assembled suspended floor structure 31, and the first suspension member 17 is moved up to a predetermined assembly / disassembly position A1.
Then, the remaining part 31 </ b> B of the suspended floor structure 31 is assembled in a vertical posture using the lifting scaffold 19 and the assembly / disassembly scaffold 20.

次に、吊り床構造体３１の前記一部３１Ａと残りの部分３１Ｂとをジョイント６７によって回動自在に接続し、第２吊り支点Ｐ２に第２吊り材２３のチェーン先端を接続する。
また、前記組立て・解体用足場２０は、前記実施例１と同様、前記吊り床構造体３１の残りの部分３１Ｂの組立て終了後に切り離す。
尚、本実施例では吊り床構造体３１の残りの部分３１Ｂの組立てに前記組立て・解体用足場２０を使用しているため、前記実施例１よりも組立て・解体用足場２０の高さが低くなっており、より安全に吊り床構造体３１の組み立てや解体ができるようになっている。これに伴ない、組立て・解体位置Ａ１も前記実施例１の組立て・解体位置Ａよりも低くなっている。 Next, the part 31A and the remaining part 31B of the suspended floor structure 31 are rotatably connected by a joint 67, and the chain tip of the second suspension member 23 is connected to the second suspension fulcrum P2.
Further, the assembly / disassembly scaffold 20 is separated after the assembly of the remaining portion 31B of the suspended floor structure 31 is completed, as in the first embodiment.
In this embodiment, since the assembly / disassembly scaffold 20 is used for assembling the remaining portion 31B of the suspended floor structure 31, the height of the assembly / disassembly scaffold 20 is lower than that of the first embodiment. Thus, the suspended floor structure 31 can be assembled and disassembled more safely. Accordingly, the assembly / disassembly position A1 is also lower than the assembly / disassembly position A of the first embodiment.

（２）吊り床構造体の回動吊上げ工程（図１７、図１８参照）
本工程では、前記実施例１と同様、移動作業車２１を徐々に前進させると同時に第２吊り材２３のチェーンを徐々に引き上げて行く。これに伴なって、縦姿勢の吊り床構造体３１の残りの部分３１Ｂは、前記ジョイント６７の取付け部位を回動支点として図１７中、反時計方向に回動し、図１８に示す吊り床構造体３１の一部３１Ａと残りの部分３１Ｂが一直線になる横姿勢に移行したところで前記移動作業車２１の前進と前記第２吊り材２３のチェーンの引き上げが停止される。 (2) Rotating lifting process of suspended floor structure (see FIGS. 17 and 18)
In this step, as in the first embodiment, the mobile work vehicle 21 is gradually advanced and at the same time the chain of the second suspension member 23 is gradually pulled up. Accordingly, the remaining portion 31B of the suspended floor structure 31 in the vertical posture rotates counterclockwise in FIG. 17 with the attachment portion of the joint 67 as a pivot point, and the suspended floor shown in FIG. The forward movement of the mobile work vehicle 21 and the lifting of the chain of the second suspension member 23 are stopped when a transition is made to a lateral posture in which a part 31A of the structure 31 and the remaining part 31B are in a straight line.

（３）吊り支保工の組立て工程（図１８参照）
本工程では、前記実施例１と同様、前記組立て・解体用足場２０または併設する昇降足場１９を使用して作業者が横姿勢に移行した吊り床構造体３１の床板３９上に乗り、吊り支保工４３を組み立てる。 (3) Assembly process of suspension support (see Fig. 18)
In this step, as in the first embodiment, the operator rides on the floor plate 39 of the suspended floor structure 31 that has shifted to the horizontal posture using the assembly / disassembly scaffold 20 or the accompanying lifting / lowering scaffold 19 and supports the suspension. Assemble the craft 43.

（４）吊り床構造体と吊り支保工の設置工程（図１９参照）
本工程では、前記実施例１と同様、移動作業車２１を停止させた状態で第１吊り材１７と第２吊り材２３を同速度で引き上げ、吊り床構造体３１を柱頭部７下方の所定の位置Ｂに移動させる。
そして、前記実施例１と同様、第５吊り材２９を第１吊り支点Ｐ１に接続し、その後、第１吊り材１７と吊り床構造体３１との接続を解除する。 (4) Installation process of suspension floor structure and suspension support (see Fig. 19)
In this step, as in the first embodiment, the first suspension member 17 and the second suspension member 23 are pulled up at the same speed while the mobile work vehicle 21 is stopped, and the suspended floor structure 31 is moved to a predetermined position below the column head 7. To position B.
Then, as in the first embodiment, the fifth suspension material 29 is connected to the first suspension fulcrum P1, and then the connection between the first suspension material 17 and the suspended floor structure 31 is released.

次に、前記実施例１と同様、第３吊り材２５と第４吊り材２７とによって吊り支保工４３を引き上げて図１９に示す柱頭部７下方の所定の位置Ｃに吊り支保工４３を設置する。
以上で実施例３に係る橋梁移動作業装置の組立て方法における組立て時の工程は完了するが、解体時の工程は、前記組立て時の工程の逆の手順を辿ればよく、橋梁移動作業装置１の解体も組立て時と同様、安全、確実に実行される。
そして、このようにして構成される実施例３に係る橋梁移動作業装置の組立て方法及び解体方法によっても前述した実施例１と同様の作用、効果が発揮される。 Next, as in the first embodiment, the suspension support 43 is pulled up by the third suspension member 25 and the fourth suspension member 27, and the suspension support 43 is installed at a predetermined position C below the column head 7 shown in FIG. To do.
As described above, the process at the time of assembling in the method of assembling the bridge moving work apparatus according to the third embodiment is completed, but the process at the time of disassembling may be performed by following the reverse procedure of the process at the time of assembling. Disassembly is performed safely and reliably as in assembly.
The same operations and effects as those of the first embodiment described above are also exhibited by the assembly method and the disassembly method of the bridge moving work device according to the third embodiment configured as described above.

［他の実施例］
本発明に係る橋梁移動作業装置の組立て方法及び解体方法は、以上述べたような構成を基本とするものであるが、本願発明の要旨を逸脱しない範囲内の部分的構成の変更や省略等を行うことも勿論可能である。
例えば、吊り床構造体３１の縦梁３５は、一端部３５ａを折曲げ可能に構成する場合に限らず、一端部３５ａを他の部位３５ｂ内に収容できる入れ子構造にして一端部３５ａを伸縮可能に構成したり、橋脚５と干渉する虞れのある一端部３５ａを予め取り除いておくようにすることが可能である。 [Other embodiments]
The assembling method and the disassembling method of the bridge moving work device according to the present invention are based on the configuration as described above, but modifications or omissions of partial configurations within the scope not departing from the gist of the present invention are included. It is of course possible to do this.
For example, the vertical beam 35 of the suspended floor structure 31 is not limited to the structure in which the one end 35a can be bent, and the one end 35a can be expanded and contracted by a nested structure in which the one end 35a can be accommodated in another part 35b. It is possible to remove the one end portion 35a that may interfere with the pier 5 in advance.

また、前記縦梁３５の一端部３５ａと他の部位３５ｂの連結部に適用したロック装置６１は、図１０に示すようなボルト等の締結具で固定する係合式の金具によって構成する他、クランプ式のターンバックル等でもよいし、前記一端部３５ａと他の部位３５ｂに予め形成しておいたフランジ等を利用して直接、ボルトやナット等を使用して固定する構造であってもよい。 Further, the locking device 61 applied to the connecting portion between the one end portion 35a of the longitudinal beam 35 and the other portion 35b is constituted by an engaging metal fitting fixed with a fastener such as a bolt as shown in FIG. It may be a turnbuckle of the type, or may be a structure that is fixed directly using bolts, nuts or the like using a flange or the like formed in advance on the one end portion 35a and the other portion 35b.

また、前記回動吊上げ工程を、前記吊り床構造体３１を前記縦姿勢で所定に高さまで吊上げた後、回動させて前記横姿勢に移行することも行える。これにより、吊り床構造体３１を回動させて縦姿勢から横姿勢に移行するのは、該吊り床構造体３１がある程度の高さまで吊上げられてからになる。従って、橋梁２の張出し方向における橋脚５の下方の作業スペースが極めて狭くて、縦姿勢の吊り床構造体３１を吊上げると同時に回動すると周囲の物と干渉してしまう場合でも、そのような干渉の問題なく組み立てることができる。 Further, in the rotating lifting step, the suspended floor structure 31 is lifted to a predetermined height in the vertical posture, and then rotated to shift to the horizontal posture. Thus, the suspension floor structure 31 is rotated to shift from the vertical posture to the horizontal posture after the suspension floor structure 31 is lifted to a certain height. Therefore, even when the working space below the pier 5 in the extending direction of the bridge 2 is extremely narrow and the suspended floor structure 31 in the vertical posture is lifted and rotated at the same time, it interferes with surrounding objects. Can be assembled without interference problems.

１橋梁移動作業装置、２橋梁、５橋脚、７柱頭部、
９橋桁、１１横梁、１３レール、
１７第１吊り材、１９昇降足場、２０組立て・解体用足場、
２１移動作業車、２３第２吊り材、２５第３吊り材、２７第４吊り材、
２９第５吊り材、３１吊り床構造体、３３大梁（横梁）、
３４大梁（横梁）、３５縦梁、３５ａ一端部、３５ｂ他の部位、
３７小梁（横梁）、３９床板、４１安全柵、４３吊り支保工、
４５車輪、４７下桁、４９上桁、５１傾斜支持枠、
５３車体フレーム、５５走行モータ、５７フレーム構造、
５９ヒンジ部、６１ロック装置、６３型枠、６５道路、
６７ジョイント、Ｇ地中、Ｘ幅方向、Ｙ張出し方向、Ｏ重心、
Ｐ１第１吊り支点、Ｐ２第２吊り支点、Ａ組立て・解体位置、
Ｂ所定の位置、Ｃ所定の位置 1 bridge moving work equipment, 2 bridges, 5 piers, 7 column heads,
9 bridge girder, 11 cross beam, 13 rail,
17 First suspension material, 19 Lifting scaffolding, 20 Assembly / disassembly scaffolding,
21 mobile work vehicle, 23 second suspension material, 25 third suspension material, 27 fourth suspension material,
29 Fifth suspension material, 31 Suspended floor structure, 33 Large beam (horizontal beam),
34 Large beam (horizontal beam), 35 Vertical beam, 35a One end, 35b Other parts,
37 beam (horizontal beam), 39 floor board, 41 safety fence, 43 suspension support,
45 wheels, 47 lower girder, 49 upper girder, 51 inclined support frame,
53 body frame, 55 travel motor, 57 frame structure,
59 hinge part, 61 locking device, 63 formwork, 65 road,
67 joint, G underground, X width direction, Y overhang direction, O center of gravity,
P1 first suspension fulcrum, P2 second suspension fulcrum, A assembly / disassembly position,
B Predetermined position, C Predetermined position

Claims

A first step of installing a mobile work vehicle on the upper surface of the column head of the pier;
A second step of assembling all or part of the suspended floor structure suspended by the mobile work vehicle in a vertical posture along the pier;
A third step of lifting the suspended floor structure with a first suspension member lowered from a fixed position at the pillar head and a second suspension member lowered from the mobile work vehicle,
In the third step, the suspended floor structure in the vertical posture is rotated to a horizontal posture by adjusting a feeding length of the first and second suspension materials and a moving amount of the mobile work vehicle. A method for assembling a bridge moving work device, comprising a rotation lifting step of lifting the suspension floor structure to a predetermined position below the column head.

In the assembling method of the bridge moving work device according to claim 1,
The method of assembling a bridge moving work apparatus, wherein the rotating lifting step includes lifting the suspended floor structure to a predetermined height in the vertical posture and then rotating the suspension floor structure to the horizontal posture.

In the assembling method of the bridge moving work device according to claim 1 or 2,
A bridge moving work device, wherein the lower end side of the suspended floor structure in the vertical posture is rotated so as to be pulled up rearward with respect to the front in the moving direction of the mobile work vehicle, and is shifted to the horizontal posture. Assembling method.

A first suspension member that is lowered from a fixed position on the column head from a state in which the suspension floor structure is suspended from the movable work vehicle on the upper surface of the column head of the pier, and a second suspension member that is lowered from the movable work vehicle. A first dismantling step for transitioning to a suspended state;
Disassembling second step of hanging down the suspended floor structure with the first suspension material and the second suspension material,
In the dismantling second step, the suspension floor structure in the horizontal posture is rotated by adjusting the feeding lengths of the first suspension material and the second suspension material and the movement amount of the mobile work vehicle. And a dismantling method of the bridge moving work device, comprising a rotating and hanging step of lowering the suspended floor structure to a predetermined position below the pier.