JP2021070978A - Heavy object movement device and heavy object movement method using the heavy object movement device - Google Patents

Heavy object movement device and heavy object movement method using the heavy object movement device Download PDF

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JP2021070978A
JP2021070978A JP2019198314A JP2019198314A JP2021070978A JP 2021070978 A JP2021070978 A JP 2021070978A JP 2019198314 A JP2019198314 A JP 2019198314A JP 2019198314 A JP2019198314 A JP 2019198314A JP 2021070978 A JP2021070978 A JP 2021070978A
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heavy object
moving device
object moving
rail
floor slab
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JP7346246B2 (en
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康太 丈達
Kota Jotatsu
康太 丈達
重洋 岡
Shigehiro Oka
重洋 岡
孝之 岩城
Takayuki Iwaki
孝之 岩城
徹 越水
Toru Koshimizu
徹 越水
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Obayashi Corp
Nippon Express Co Ltd
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Obayashi Corp
Nippon Express Co Ltd
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Priority to JP2023068447A priority patent/JP7330411B2/en
Priority to JP2023144140A priority patent/JP2023164951A/en
Priority to JP2023144141A priority patent/JP2023164952A/en
Priority to JP2023144139A priority patent/JP2023164950A/en
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Abstract

To provide a heavy object movement device and a heavy object movement method using the heavy object movement device that allows easy transportation to a construction site and installation at the site.SOLUTION: A heavy object movement device comprises: traverse rails; a pair of gantry frames provided facing each other near both ends of the traverse rails; and a lifting mechanism that runs along the traverse rails. A heavy object movement method using the heavy object movement device to move heavy objects includes the steps of: deploying and installing gantry frames having shortened braces and connecting beams, in which the gantry frames comprise a pair of braces that can be expanded and contracted in the height direction, and the connecting beam that connects the upper ends of the braces and can be expanded and contracted in the longitudinal direction; lifting and moving a heavy object by making a heavy mechanism run along the traverse rails while the heavy object is suspended; and minimizing the unfolded gantry frames by shortening both the braces and the connecting beams.SELECTED DRAWING: Figure 2

Description

本発明は、重量物を揚重し移動させるための重量物移動装置を用いた重量物の移動方法及び重量物移動装置に関する。 The present invention relates to a method for moving a heavy object using a heavy object moving device for lifting and moving a heavy object, and a heavy object moving device.

従来より、Ｉ型の主桁上に設置された既設床版を新設床版に取り替える橋梁の床版取り替え工法において、既設床版を撤去する際には、まず、運搬車両の荷台に積載可能な形状に既設床版を切断する。こののち、例えばクレーン等の揚重装置を用いてこの既設床版の切断片を吊り上げつつ、運搬車両の荷台まで移動させる方法が知られている。 Conventionally, in the bridge floor slab replacement method of replacing the existing floor slab installed on the main girder of type I with a new floor slab, when removing the existing floor slab, it can be first loaded on the loading platform of the transport vehicle. Cut the existing floor slab into a shape. After that, a method is known in which a cut piece of the existing floor slab is lifted by using a lifting device such as a crane and moved to a loading platform of a transport vehicle.

このような中、特許文献１では、既設床版の一部である撤去部材を、架設桁型揚重装置を用いて撤去する方法が開示されている。架設桁型揚重装置は、施工現場で組み立てる構造の装置であり、まず、４本の支柱で平面視長方形の構台の４隅を支持したリフターを２台準備し、これらを１台ずつ貨物自動車の荷台に積載して施工現場に搬入する。次に、２台のリフターを撤去部材を挟んで間隔を設けて配置し、架設桁をリフター各々の構台に架け渡すようにして設置し、架設桁に吊り荷機構を横行自在に設置する。 Under such circumstances, Patent Document 1 discloses a method of removing a removal member which is a part of an existing floor slab by using an erection girder type lifting device. The erection girder type lifting device is a device with a structure that is assembled at the construction site. First, two lifters that support the four corners of a rectangular gantry in a plan view with four columns are prepared, and each of these is a freight vehicle. It is loaded on the loading platform and carried to the construction site. Next, the two lifters are arranged so as to be spaced apart from each other with the removal member in between, and the erection girders are installed so as to be bridged over the gantry of each of the lifters, and the hanging load mechanism is traversively installed on the erection girders.

こうして組み立てた架設桁型揚重装置の吊り荷機構を介して、既設床版の一部である撤去部材を吊り上げることにより撤去部材を道路橋から撤去し、また、撤去部材を吊持しつつ吊り荷機構を架設桁に沿って横行させる。その一方で、２台のリフターのうちいずれか一方の構台下に運搬車両を乗り入れておき、吊り荷機構が架設桁に沿って構台下まで移動したところで、吊り荷機構に吊持されている撤去部材を運搬車両の荷台に吊り下ろす。 The removal member is removed from the road bridge by lifting the removal member that is a part of the existing deck through the lifting mechanism of the erection girder type lifting device assembled in this way, and the removal member is suspended while being suspended. The loading mechanism is traversed along the erection girder. On the other hand, when the transport vehicle is placed under the gantry of one of the two lifters and the hanging load mechanism moves to the bottom of the gantry along the erection girder, it is suspended by the hanging load mechanism. Suspend the removed member on the loading platform of the transport vehicle.

特開２０１８−２０４４２７号公報JP-A-2018-204427

特許文献１に記載されている架設桁型揚重装置は、市場で取引されている一般的な装置であるリフターを利用し、これに吊り荷機構を備えた架設桁を架け渡すようにして組み立てたものであり、専用装置を製作する手間やコストを省略しつつ、撤去部材の撤去作業を実施することが可能となっている。 The erection girder type lifting device described in Patent Document 1 is assembled by using a lifter, which is a general device traded in the market, and laying an erection girder provided with a loading mechanism on the lifter. Therefore, it is possible to carry out the work of removing the removal member while saving the labor and cost of manufacturing the dedicated device.

しかし、リフターは前述したように、４本の支柱で平面視長方形の構台の４隅を支持した形状であり、このリフターを撤去部材を挟んで２台設置すると合計で８本の支柱を据え付けるスペースが必要となる。すると、施工現場において架設桁型揚重装置の占める面積が広大となるため、施工現場によっては設置スペースを確保することが確保が困難な場合が生じる。 However, as mentioned above, the lifter has a shape in which the four corners of the rectangular gantry in a plan view are supported by four columns, and if two of these lifters are installed with the removal member in between, a total of eight columns can be installed. Is required. Then, since the area occupied by the erection girder type lifting device becomes large at the construction site, it may be difficult to secure the installation space depending on the construction site.

また、施工現場で２台のリフターを据え付け、これらに吊り荷機構を備えた架設桁を架け渡す組み立て作業は煩雑であり、また、これらを施工現場に搬入するための貨物自動車が複数台必要となるため、これら貨物自動車が停車するための場所の確保や搬送費用が増大するなど、工期及び工費また作業性の面で課題が生じる。 In addition, the assembly work of installing two lifters at the construction site and connecting the erection girders equipped with the suspension mechanism to them is complicated, and multiple freight vehicles are required to bring these to the construction site. As a result, there are problems in terms of construction period, construction cost, and workability, such as securing a place for these freight vehicles to stop and increasing transportation costs.

本発明は、かかる課題に鑑みなされたものであって、その主な目的は、現場への搬出入が容易であるとともに、施工現場での据え付け作業が容易な重量物移動装置を用いた重量物の移動方法及び重量物移動装置を提供することである。 The present invention has been made in view of such a problem, and a main object thereof is a heavy object using a heavy object moving device which is easy to carry in and out to the site and easy to install at the construction site. Is to provide a moving method and a heavy object moving device.

かかる目的を達成するため、本発明の重量物移動装置を用いた重量物の移動方法は、横行レールと、該横行レールの両端部近傍に対向して設けられる一対の門型フレームと、前記横行レールに沿って走行する揚重機構と、を備える重量物移動装置用いて重量物を揚重移動する、重量物移動方法であって、前記門型フレームが、高さ方向に伸縮自在な一対の支柱と、該支柱の上端部どうしを連結し長手方向に伸縮自在な連結梁と、を備え、前記支柱と前記連結梁が短小化された状態の前記門型フレームを、展開して据え付ける工程と、前記重量物を吊持させた状態の前記揚重機構を、前記横行レールに沿って走行させることにより、前記重量物を揚重移動する工程と、前記支柱と前記連結梁の両者を短小化することにより、前記展開した門型フレームを最小化する工程と、を備えることを特徴とする。 In order to achieve such an object, the method of moving a heavy object using the heavy object moving device of the present invention includes a traverse rail, a pair of portal frames provided so as to face each other in the vicinity of both ends of the traverse rail, and the traverse. A method of moving a heavy object by lifting and moving a heavy object using a lifting mechanism including a lifting mechanism that travels along a rail, wherein the gate-shaped frame is a pair that can be expanded and contracted in the height direction. A step of deploying and installing the support column and the gate-shaped frame in a state in which the support column and the connection beam are shortened, including a support column and a connecting beam that connects the upper ends of the support column and can be expanded and contracted in the longitudinal direction. By running the lifting mechanism in a state where the heavy object is suspended along the traverse rail, the step of lifting and moving the heavy object and both the support column and the connecting beam are shortened. By doing so, it is characterized by including a step of minimizing the developed portal frame.

また、本発明の重量物移動装置は、横行レールと、該横行レールの両端部近傍に対向して設けられる一対の門型フレームと、前記横行レールに沿って走行する揚重機構と、を備える重量物移動装置であって、前記門型フレームが、高さ方向に伸縮自在な一対の支柱と、該支柱の上端部どうしを連結し長手方向に伸縮自在な連結梁と、を有することを特徴とする。 Further, the heavy object moving device of the present invention includes a traverse rail, a pair of portal frames provided so as to face each other in the vicinity of both ends of the traverse rail, and a lifting mechanism that travels along the traverse rail. A heavy object moving device, wherein the gantry frame has a pair of columns that can be expanded and contracted in the height direction, and a connecting beam that connects the upper ends of the columns and can be expanded and contracted in the longitudinal direction. And.

本発明の重量物移動装置を用いた重量物の移動方法及び重量物移動装置によれば、門型フレームが、高さ方向に伸縮自在な一対の支柱と、支柱の上端部どうしを連結し長手方向に伸縮自在な連結梁と、により構成される。これにより、支柱の最短長さを、トレーラーに積載した際に道路通行の可能な高さに設定し、連結梁の最短長さを、一対の支柱をトレーラーに積載可能な幅に収まる間隔で連結できる長さに設定することにより、重量物移動装置を分解することなくトレーラーに積載し施工現場に搬出入できる。 According to the method of moving a heavy object and the heavy object moving device using the heavy object moving device of the present invention, the portal frame connects a pair of columns that can be expanded and contracted in the height direction and the upper ends of the columns to be long. It is composed of connecting beams that can be expanded and contracted in the direction. As a result, the shortest length of the columns is set to the height that allows road traffic when loaded on the trailer, and the shortest length of the connecting beams is connected at intervals that fit the width of the pair of columns that can be loaded on the trailer. By setting the length so that it can be loaded on the trailer without disassembling the heavy object moving device, it can be carried in and out of the construction site.

その一方で、重量物の揚重作業を行う際には、トレーラーで施工現場に搬入したのちに組み立て作業を行うことなく、支柱と連結梁とをそれぞれ伸長して門型フレームを所望の大きさに展開し、据え付ければよい。 On the other hand, when lifting heavy objects, the columns and connecting beams are extended to the desired size without assembling after being carried to the construction site by a trailer. It can be deployed and installed in.

したがって、施工現場で重量物移動装置を搬出入するたびに、組立及び解体作業を実施する必要が無く、施工性を大幅に向上することが可能となる。また、１台のトレーラで搬出入できるため、複数の運搬車両を必要とする場合と比較して搬送費用を削減することができ、工期短縮及び工費削減に寄与する寄与することが可能となる。 Therefore, it is not necessary to carry out assembly and disassembly work every time the heavy object moving device is carried in and out at the construction site, and the workability can be significantly improved. In addition, since it can be carried in and out with one trailer, it is possible to reduce the transportation cost as compared with the case where a plurality of transportation vehicles are required, and it is possible to contribute to shortening the construction period and reducing the construction cost.

さらに、従来技術では、市場で取引されている一般的な装置であるリフターを２台、合計８本の支柱を設置するスペースが必要なところ、本発明では、門型フレームが２本の支柱を備える構造であるため合計４本の支柱を設置するスペースで足り、狭小なスペースにも設置することが可能となる。また、施工現場で重量物移動装置を据え付ける際は、門型フレームの支柱および連結梁を所望の長さに伸長して展開でき、作業エリアとなる内方空間に所望の広さを確保することが可能となる。 Further, in the prior art, a space for installing two lifters, which is a general device traded in the market, for a total of eight columns is required. However, in the present invention, the portal frame has two columns. Since the structure is provided, a space for installing a total of four columns is sufficient, and it is possible to install even in a narrow space. In addition, when installing a heavy-duty moving device at a construction site, the columns and connecting beams of the portal frame can be extended to the desired length and deployed, ensuring the desired area in the inner space that serves as the work area. Is possible.

本発明の重量物移動装置は、前記横行レールの一方の端部が、対向する一対の前記門型フレームより外方に張り出して設けられ、該横行レールの一方の端部に、積込みホイストが設けられることを特徴とする。 In the heavy object moving device of the present invention, one end of the traversing rail is provided so as to project outward from the pair of opposing portal frames, and a loading hoist is provided at one end of the traversing rail. It is characterized by being able to be.

本発明の重量物移動装置によれば、横行レールの一方の端部に、積込みホイストが設けられることから、重量物を吊り上げた揚重機構を横行レールに沿って走行させ、重量物を横行レールの一方の端部まで移動させたのち、積込みホイストに盛り替えて重量物を再度吊り上げることができる。これにより、積込みホイストを利用して搬送車両への重量物の積み込み作業を行いながら、揚重機構で新たな重量物の移動作業を実施でき、作業効率を大幅に向上することが可能となる。 According to the heavy object moving device of the present invention, since a loading hoist is provided at one end of the traverse rail, a lifting mechanism for lifting the heavy object is driven along the traverse rail to move the heavy object to the traverse rail. After moving to one end, it can be replaced with a loading hoist to lift heavy objects again. As a result, it is possible to carry out the work of moving a new heavy object by the lifting mechanism while performing the work of loading the heavy object into the transport vehicle by using the loading hoist, and it is possible to greatly improve the work efficiency.

本発明の重量物移動装置は、前記横行レールと平行な側面に、サイドパネルが設けられていることを特徴とする。 The heavy object moving device of the present invention is characterized in that a side panel is provided on a side surface parallel to the traverse rail.

本発明の重量物移動装置によれば、内方空間に設定される作業エリアのプロテクタとしてサイドパネルが機能する。したがって、例えば重量物移動装置を道路工事に適用する際、重量物移動装置の側方で一般車両を通行させつつ内方空間の作業エリアで道路工事を進捗させても、作業上の安全性を向上させることが可能となる。 According to the heavy object moving device of the present invention, the side panel functions as a protector of the work area set in the inner space. Therefore, for example, when applying a heavy object moving device to road construction, even if the road construction is progressed in the work area of the inner space while passing a general vehicle on the side of the heavy object moving device, the work safety is maintained. It is possible to improve.

本発明の重量物移動装置は、前記揚重機構に、橋梁の主桁から既設床版を引きはがす床版撤去装置が設置されていることを特徴とする。 The heavy object moving device of the present invention is characterized in that the lifting mechanism is provided with a deck removing device for peeling off an existing deck from the main girder of a bridge.

本発明の重量物移動装置によれば、揚重機構に床版撤去装置が支持されていることから、橋梁の主桁から既設床版を撤去する際、運搬車両に積載可能に切断した切断片を、床版撤去装置を用いて主桁から引きはがして撤去する。次に、切断片と床版撤去装置とを揚重機構で吊り上げ、横行レールに沿って揚重機を走行させて切断片を床版撤去装置とともに移動させる。そのうえで、切断片を床版撤去装置から取り外せば、切断片を施工現場から搬出できる。 According to the heavy object moving device of the present invention, since the floor slab removing device is supported by the lifting mechanism, when the existing floor slab is removed from the main girder of the bridge, the cut pieces cut so as to be loaded on the transport vehicle. Is removed from the main girder using a floor slab removal device. Next, the cut piece and the floor slab removing device are lifted by a lifting mechanism, and the lifting machine is run along the traverse rail to move the cut piece together with the floor slab removing device. Then, if the cut piece is removed from the floor slab removing device, the cut piece can be taken out from the construction site.

これにより、重量物移動装置を用いて切断片の撤去から搬出までの一連の作業を実施でき、作業効率を大幅に向上させることができる。また、床版撤去装置を常時揚重機構に支持させておくことができるため、床版撤去装置の仮置き場が不要となり、作業エリアを広く確保することが可能となる。 As a result, a series of operations from the removal of the cut pieces to the removal of the cut pieces can be carried out using the heavy object moving device, and the work efficiency can be significantly improved. Further, since the floor slab removing device can be constantly supported by the lifting mechanism, a temporary storage place for the floor slab removing device becomes unnecessary, and a wide work area can be secured.

本発明によれば、横行レールの両端部近傍各々に設ける一対の門型フレームが、高さ方向に伸縮自在な一対の支柱と長手方向に伸縮自在な連結梁とにより構成されるから、支柱及び連結梁を最短にした状態をトレーラーに積載可能な大きさに形成することにより、重量物移動装置をトレーラーに積載し施工現場に搬出入できるとともに、搬出入するたびに組立及び解体作業を実施する必要が無いため、施工現場への搬出入作業及び据え付け作業を容易に実施することが可能となる。 According to the present invention, a pair of portal frames provided near both ends of the traverse rail is composed of a pair of columns that can be expanded and contracted in the height direction and a connecting beam that can be expanded and contracted in the longitudinal direction. By forming the connecting beam in the shortest state so that it can be loaded on the trailer, the heavy load moving device can be loaded on the trailer and carried in and out of the construction site, and assembly and disassembly work is carried out each time it is carried in and out. Since it is not necessary, it is possible to easily carry out the loading / unloading work and the installation work at the construction site.

本発明の実施の形態における重量物移動装置をトレーラーに積載した様子を示す図である。It is a figure which shows the state which the heavy object moving device in embodiment of this invention is loaded on a trailer. 本発明の実施の形態における重量物移動装置の後面を示す図である。It is a figure which shows the rear surface of the heavy object moving apparatus in embodiment of this invention. 本発明の実施の形態における重量物移動装置の側断面（Ａ−Ａ断面）を示す図である。It is a figure which shows the side cross section (AA cross section) of the heavy object moving apparatus in embodiment of this invention. 本発明の実施の形態における揚重機構を示す図である。It is a figure which shows the lifting mechanism in embodiment of this invention. 本発明の実施の形態における旋回レール及び旋回トロリーを示す図である。It is a figure which shows the swivel rail and swivel trolley in embodiment of this invention. 本発明の実施の形態における床版撤去装置を示す図である。It is a figure which shows the floor slab removal apparatus in embodiment of this invention. 本発明の実施の形態における重量物移動装置を用いて既設床版の切断片を主桁から撤去し移動する手順を示す図である（その１）。It is a figure which shows the procedure of removing the cut piece of an existing floor slab from a main girder and moving by using the heavy weight moving device in embodiment of this invention (the 1). 本発明の実施の形態における重量物移動装置を用いて既設床版の切断片を主桁から撤去し移動する手順を示す図である（その２）。It is a figure which shows the procedure of removing the cut piece of an existing floor slab from a main girder and moving by using the heavy weight moving device in embodiment of this invention (the 2). 本発明の実施の形態における重量物移動装置を用いて既設床版の切断片の撤去跡に新設床版片を配置する手順を示す図である。It is a figure which shows the procedure of arranging the new floor slab piece in the removal trace of the cut piece of the existing floor slab by using the heavy weight moving device in embodiment of this invention.

本発明の重量物移動装置は、重量物を揚重し移動させる装置であって、トレーラに積載可能でありながら、施工現場にて所望の高さ及び幅に展開することの可能な構造を有するものである。本実施の形態では、道路橋のＩ型主桁に設置された既設床版を新設床版に取り替える橋梁の床版取り替え工法に、重量物移動装置を適用する場合を事例に挙げ、以下にその詳細を説明する。 The heavy object moving device of the present invention is a device for lifting and moving a heavy object, and has a structure that can be loaded on a trailer and can be deployed to a desired height and width at a construction site. It is a thing. In the present embodiment, a case where a heavy object moving device is applied to a bridge deck replacement method for replacing an existing deck installed on a road bridge type I main girder with a new deck is taken as an example, and the case is described below. The details will be described.

なお、床版取り替え工法では、既設床版を新設床版に取り替えるにあたって、既設床版を運搬車両の荷台に積載できる大きさの切断片に切断するが、重量物移動装置は、この切断片を主桁上から移動させ、運搬車両に積載するまでの作業を行う。 In the floor slab replacement method, when replacing an existing floor slab with a new floor slab, the existing floor slab is cut into cut pieces of a size that can be loaded on the loading platform of a transportation vehicle. Work is performed from the top of the main girder to loading on the transport vehicle.

≪≪重量物移動装置≫≫
重量物移動装置１００は、図１（ａ）（ｂ）で示すように、その大きさをトレーラーＴに積載可能な長さＬ、幅Ｗ、及び高さＨに変更できる構造を有し、図２で示すように、一対の門型フレーム１２を備える伸縮フレーム機構１０と、一対の門型フレーム１２に架け渡された横行レール１１に沿って移動する揚重機構２０と、揚重機構２０に設置された床版撤去装置３０とを備える。 ≪≪Heavy object moving device≫≫
As shown in FIGS. 1A and 1B, the heavy object moving device 100 has a structure capable of changing its size to a length L, a width W, and a height H that can be loaded on the trailer T. As shown in 2, the telescopic frame mechanism 10 including the pair of gate-shaped frames 12, the lifting mechanism 20 moving along the traverse rail 11 spanning the pair of gate-shaped frames 12, and the lifting mechanism 20. It is provided with an installed floor slab removing device 30.

≪伸縮フレーム機構≫
伸縮フレーム機構１０は、図２及び図３で示すように、１対の門型フレーム１２と、門型フレーム１２どうしを連結する１対の連結トラス１５と、連結トラス１５に平行に配置される２体の横行レール１１と、を備え、門型フレーム１２は、図２で示すように、間隔をもって配置された一対の支柱１３と、一対の支柱１３の上端部近傍を連結した連結梁１４とにより構成されている。 ≪Expandable frame mechanism≫
As shown in FIGS. 2 and 3, the telescopic frame mechanism 10 is arranged in parallel with the pair of gantry frames 12, the pair of connecting trusses 15 connecting the gantry frames 12, and the connecting trusses 15. As shown in FIG. 2, the gantry frame 12 includes two traverse rails 11, a pair of columns 13 arranged at intervals, and a connecting beam 14 connecting the vicinity of the upper ends of the pair of columns 13. It is composed of.

支柱１３は、伸縮機構を有する揚重装置であればいずれを採用してもよいが、本実施の形態では油圧ジャッキを採用し、図２で示すように、シリンダ１３１が上方に位置しピストンロッド１３２が下方に位置するように配置されている。また、支柱１３の最短長さは、図１（ｂ）で示すように、トレーラーＴに積載した際に道路通行の可能な高さＨに設定されている。 As the support column 13, any lifting device having a telescopic mechanism may be adopted, but in the present embodiment, a hydraulic jack is adopted, and as shown in FIG. 2, the cylinder 131 is located above and the piston rod. 132 is arranged so as to be located below. Further, as shown in FIG. 1B, the shortest length of the support column 13 is set to a height H that allows road passage when loaded on the trailer T.

連結梁１４は、図２で示すように、その両端部に長さを調整可能なテレスコピック機構が設けられており、最短長さは、図１（ｂ）で示すように、一対の支柱１３をトレーラーＴに積載可能な幅Ｗに収まる間隔で連結できる長さに設定されている。 As shown in FIG. 2, the connecting beam 14 is provided with a telescopic mechanism whose length can be adjusted at both ends thereof, and the shortest length is a pair of columns 13 as shown in FIG. 1 (b). The length is set so that it can be connected at intervals that fit in the width W that can be loaded on the trailer T.

なお、支柱１３と連結梁１４との取り合いには図２で示すように、ブレース材１２１が設けられて補強がなされている。ブレース材１２１は、上記のとおり門型フレーム１２が展開した際これに追従するよう、ネジ式伸縮部材や油圧ジャッキ等の伸縮装置により構成されているとともに、その両端部が支柱１３および連結梁１４に対して回転自在に連結されている。 As shown in FIG. 2, a brace material 121 is provided to reinforce the connection between the support column 13 and the connecting beam 14. The brace material 121 is composed of an expansion / contraction device such as a screw type expansion / contraction member and a hydraulic jack so as to follow the gate type frame 12 when it is deployed as described above, and both ends thereof are a support column 13 and a connecting beam 14. It is rotatably connected to.

連結トラス１５は、トレーラーＴに積載可能な長さＬより短小な間隔で並列配置された一対の門型フレーム１２どうしを連結するものであり、図２で示すように、門型フレーム１２を構成する一対の支柱１３と同じ間隔で、２本が並列配置されている。そして、２本の連結トラス１５の間に、これらと平行して２本の横行レール１１が所定の間隔を有して配置されている。 The connecting truss 15 connects a pair of gate-shaped frames 12 arranged in parallel at intervals shorter than the length L that can be loaded on the trailer T, and constitutes the gate-shaped frame 12 as shown in FIG. Two of them are arranged in parallel at the same interval as the pair of columns 13. Then, between the two connecting trusses 15, two traversing rails 11 are arranged in parallel with them at a predetermined interval.

２本の横行レール１１はそれぞれ、図３で示すように、一対の門型フレーム１２を架け渡すようにして両端部の近傍各々が、連結梁１４の下面側に設置されている。その長さは、連結トラス１５より長く、最大でトレーラーＴに積載可能な長さＬに形成され、両端部各々が一対の門型フレーム１２の間に形成された空間から外方に突き出している。そして、横行レール１１各々の一方の端部には、２台の積込みホイスト１１２が隣接して配置され、他方の端部にはチェーンブロック１１１が設置されている。 As shown in FIG. 3, each of the two traverse rails 11 is installed on the lower surface side of the connecting beam 14 in the vicinity of both ends so as to bridge the pair of gantry frames 12. Its length is longer than the connecting truss 15 and is formed to a length L that can be loaded on the trailer T at the maximum, and each of both ends protrudes outward from the space formed between the pair of gantry frames 12. .. Two loading hoists 112 are arranged adjacent to each other at one end of each of the traverse rails 11, and a chain block 111 is installed at the other end.

積込みホイスト１１２は、後述する揚重機構２０により移動された切断片Ｐを、図８（ｂ）で示すように、運搬車両Ｃに積載する際に使用するものであり、横行レール１１に架け渡すように２台が設置されている。また、チェーンブロック１１１は、１本の横行レール１１に１台ずつで合計２台が補助揚重機構として設置されているが、必ずしも設けなくてもよい。 The loading hoist 112 is used when the cut piece P moved by the lifting mechanism 20 described later is loaded on the transport vehicle C as shown in FIG. 8B, and is bridged over the traverse rail 11. Two units are installed as shown. Further, although two chain blocks 111 are installed as auxiliary lifting mechanisms, one on each traversing rail 11, the chain blocks 111 are not necessarily provided.

そして、断面がＩ型の鋼材により形成される２本の横行レール１１にはそれぞれ、下フランジをレールにして、揚重機構２０の横行トロリー２１が走行している。 The tram trolley 21 of the lifting mechanism 20 runs on each of the two traverse rails 11 having an I-shaped cross section with the lower flange as a rail.

≪揚重機構≫
揚重機構２０は、図４（ａ）（ｂ）で示すように、横行レール１１の下フランジに沿って走行する横行トロリー２１と、横行トロリー２１に吊持されている直交レール２２と、直交レール２２に沿って走行する直交トロリー２３と、直交トロリー２３に支持される旋回レール２４を備える。 ≪ Lifting mechanism≫
As shown in FIGS. 4A and 4B, the lifting mechanism 20 is orthogonal to the transverse trolley 21 traveling along the lower flange of the transverse rail 11 and the orthogonal rail 22 suspended by the transverse trolley 21. The orthogonal trolley 23 running along the rail 22 and the swivel rail 24 supported by the orthogonal trolley 23 are provided.

横行トロリー２１は、１本の横行レール１１に対して２台が間隔を有して設けられており、２本の横行レール１１に沿って合計４台が同期して走行する。また、これら横行トロリー２１に吊持された直交レール２２は、２本が間隔を有して横行レール１１に直交する方向に延在している。そして、１本の直交レール２２に対して直交トロリー２３が２台間隔を有して設けられており、合計４台が同期して２本の直交レール２２に沿って走行する。 Two tram trolleys 21 are provided at intervals with respect to one tram rail 11, and a total of four tram trolleys 21 travel in synchronization with each other along the two tram rails 11. Further, two orthogonal rails 22 suspended from the tram tram 21 extend in a direction orthogonal to the tram rail 11 with an interval. Two orthogonal trolleys 23 are provided at intervals of two orthogonal rails 22 for one orthogonal rail 22, and a total of four orthogonal trolleys 23 travel along the two orthogonal rails 22 in synchronization.

旋回レール２４は、図４及び図５で示すように、４台の直交トロリー２３に支持された平面視円形のレールである。上記のとおり４台の直交トロリー２３は、横行トロリー２１に吊持された直交レール２２に沿って走行するから、旋回レール２４の伸縮フレーム機構１０に対する平面視位置は、図５で示すように、横行レール１１の延在方向及び直交レール２２の延在方向に移動させて調整することができる。 As shown in FIGS. 4 and 5, the swivel rail 24 is a circular rail in a plan view supported by four orthogonal trolleys 23. As described above, since the four orthogonal trolleys 23 travel along the orthogonal rails 22 suspended by the tram trolley 21, the plan view positions of the swivel rails 24 with respect to the telescopic frame mechanism 10 are as shown in FIG. It can be adjusted by moving it in the extending direction of the tram rail 11 and the extending direction of the orthogonal rail 22.

揚重機構２０はさらに、旋回レール２４に沿って走行する旋回トロリー２５と、旋回トロリー２５に設けられている揚重ホイスト２６とを備えている。 The lifting mechanism 20 further includes a swivel trolley 25 traveling along the swivel rail 24 and a lifting hoist 26 provided on the swivel trolley 25.

旋回トロリー２５は、図５で示すように平面視で、旋回レール２４に対して４５度の間隔で４台設置され、隣り合う旋回トロリー２５どうしが連結材２５１を介して連結されている。これにより、旋回トロリー２５は常時、４５度の間隔を保持しながら旋回レール２４上を走行する。 As shown in FIG. 5, four swivel trolleys 25 are installed at intervals of 45 degrees with respect to the swivel rail 24, and adjacent swivel trolleys 25 are connected to each other via a connecting member 251. As a result, the swivel trolley 25 always travels on the swivel rail 24 while maintaining an interval of 45 degrees.

揚重ホイスト２６は、図４（ａ）（ｂ）で示すように、４体の旋回トロリー２５各々に設置され、これにより揚重機構２０に合計４台設置される。そして、この揚重ホイスト２６で重量物を揚重することもできるが、本実施の形態では、図３で示すように、揚重ホイスト２６で床版撤去装置３０を吊持し、この床版撤去装置３０を介して道路橋Ｂ上で切断した既設床版の切断片Ｐを主桁Ｄから撤去する。 As shown in FIGS. 4A and 4B, the lifting hoists 26 are installed in each of the four swivel trolleys 25, whereby a total of four lifting hoists 26 are installed in the lifting mechanism 20. Then, a heavy object can be lifted by the lifting hoist 26, but in the present embodiment, as shown in FIG. 3, the deck removing device 30 is suspended by the lifting hoist 26, and the deck slab is lifted. The cut piece P of the existing deck cut on the road bridge B via the removing device 30 is removed from the main girder D.

≪床版撤去装置≫
床版撤去装置３０は、道路橋Ｂの主桁Ｄから切断片Ｐを引きはがす装置であり、図６（ａ）（ｂ）で示すように、一対の縦材３１及び一対の横材３２をにより形成されるフレーム３３と、フレーム３３に設置されている吊荷用アンカー部材３４、反力ジャッキ３５、及び吊治具３６により構成されている。 ≪Floor slab removal device≫
The deck removing device 30 is a device for peeling a cut piece P from a main girder D of a road bridge B, and as shown in FIGS. 6A and 6B, a pair of vertical members 31 and a pair of horizontal members 32 are removed. It is composed of a frame 33 formed by the above, an anchor member 34 for hanging loads installed on the frame 33, a reaction force jack 35, and a hanging jig 36.

縦材３１及び横材３２はともに、一対の溝形鋼を１組として形成した長尺鋼材に形成され、溝形鋼のウェブどうしを隙間を設けて背合わせすることにより、長尺鋼材の中央部には軸線と平行する隙間が形成されている。 Both the vertical member 31 and the horizontal member 32 are formed of a long steel material formed by forming a pair of channel steels as a set, and the webs of the channel steels are back-to-back with a gap provided so that the center of the long steel material is formed. A gap parallel to the axis is formed in the portion.

フレーム３３は、図６（ａ）で示すように、間隔を設けて配置した一対の横材３２と、その上面に同じく間隔を設けて配置された一対の縦材３１とにより平面視井桁状に形成されている。このとき、縦材３１及び横材３２はいずれも長尺鋼材の隙間が上下方向に貫通する姿勢に配置されている。 As shown in FIG. 6A, the frame 33 has a plan view girder shape formed by a pair of horizontal members 32 arranged at intervals and a pair of vertical members 31 arranged at intervals on the upper surface thereof. It is formed. At this time, both the vertical member 31 and the horizontal member 32 are arranged in a posture in which the gap between the long steel members penetrates in the vertical direction.

吊荷用アンカー部材３４は、フレーム３３における横材３２と縦材３１とが重なる４か所各々に配置され、図６（ｃ）で示すように、アンカーロッド３４１がフレーム３３を貫通した状態で、頭部が縦材３１の上面にアンカープレート３４２を介して頭部ナット３４３で固定されている。また、アンカーロッド３４１の先端部は、切断片Ｐを貫通しその下面に先端ナット３４４で固定されている。これにより、吊荷用アンカー部材３４を介して切断片Ｐをフレーム３３に連結することができる。 The suspension anchor members 34 are arranged at each of the four locations where the horizontal member 32 and the vertical member 31 of the frame 33 overlap each other, and as shown in FIG. 6C, the anchor rod 341 penetrates the frame 33. The head is fixed to the upper surface of the vertical member 31 with a head nut 343 via an anchor plate 342. Further, the tip portion of the anchor rod 341 penetrates the cut piece P and is fixed to the lower surface thereof with a tip nut 344. As a result, the cut piece P can be connected to the frame 33 via the suspended load anchor member 34.

反力ジャッキ３５は、図６（ａ）で示すように、フレーム３３の４隅となる横材３２の両端部各々に配置され、図６（ｃ）で示すように、油圧ジャッキのピストンロッド３５１が横材３２の下面より下方に突出する態様で、シリンダ３５２を横材３２に内装させている。 As shown in FIG. 6A, the reaction force jacks 35 are arranged at both ends of the cross member 32 which is the four corners of the frame 33, and as shown in FIG. 6C, the piston rod 351 of the hydraulic jack is provided. The cylinder 352 is housed in the cross member 32 in such a manner that the cylinder 352 projects downward from the lower surface of the cross member 32.

ここで、フレーム３３における横材３２は、図６（ｂ）（ｃ）で示すように、反力ジャッキ３５のピストンロッド３５１が配置されている両端部近傍の下面に切欠き３３１が設けられており、反力ジャッキ３５を最も短縮させた状態でピストンロッド３５１の押圧面が、フレーム３３の下面より突出しない形状となっている。 Here, as shown in FIGS. 6B and 6C, the cross member 32 in the frame 33 is provided with notches 331 on the lower surface near both ends where the piston rods 351 of the reaction force jack 35 are arranged. The pressing surface of the piston rod 351 does not protrude from the lower surface of the frame 33 in the state where the reaction force jack 35 is most shortened.

したがって、図６（ｂ）で示すように、反力ジャッキ３５のピストンロッド３５１に阻害されることなく、フレーム３３を切断片Ｐの上面に積層することができる。そして、この状態で、切断片Ｐとフレーム３３とを連結し、反力ジャッキ３５を伸長すると、撤去しようとする切断片Ｐの周囲をピストンロッド３５１が押圧する。 Therefore, as shown in FIG. 6B, the frame 33 can be laminated on the upper surface of the cut piece P without being hindered by the piston rod 351 of the reaction force jack 35. Then, in this state, when the cutting piece P and the frame 33 are connected and the reaction force jack 35 is extended, the piston rod 351 presses the circumference of the cutting piece P to be removed.

これにより、図６（ｃ）で示すように、フレーム３３は、下面が道路橋Ｂの主桁Ｄに固着されている切断片Ｐを主桁Ｄから引きはがしつつ上昇する。こうして、切断片Ｐを道路橋Ｂの主桁Ｄから撤去することが可能となる。 As a result, as shown in FIG. 6C, the frame 33 rises while peeling the cut piece P whose lower surface is fixed to the main girder D of the road bridge B from the main girder D. In this way, the cut piece P can be removed from the main girder D of the road bridge B.

そして、床版撤去装置３０は、フレーム３３の上面に吊治具３６が設置されているから、この吊治具３６を介して揚重ホイスト２６により、切断片Ｐとともに吊り上げられる。 Since the hanging jig 36 is installed on the upper surface of the frame 33, the floor slab removing device 30 is lifted together with the cut piece P by the lifting hoist 26 via the hanging jig 36.

上述する構成の重量物移動装置１００は、図３で示すように、伸縮フレーム機構１０の側面、つまり連結トラス１５とこの連結トラス１５で連結されている支柱１３で囲まれる面にトラス構造１６が採用されて補強がなされているとともに、サイドパネル１７が設置されている。このサイドパネル１７は、伸縮フレーム機構１０の内方空間に設けられている作業エリアのプロテクタとして機能する。 In the heavy object moving device 100 having the above-described configuration, as shown in FIG. 3, the truss structure 16 is provided on the side surface of the telescopic frame mechanism 10, that is, the surface surrounded by the connecting truss 15 and the support column 13 connected by the connecting truss 15. It has been adopted and reinforced, and a side panel 17 is installed. The side panel 17 functions as a protector for a work area provided in the inner space of the telescopic frame mechanism 10.

したがって、橋梁の床版取り替え工法で既設床版の切断片Ｐを主桁Ｄから撤去し移動する際、重量物移動装置１００の側方で一般車両を通行させつつ、伸縮フレーム機構１０内の作業エリアで作業を進捗させることが可能となる。なお、トラス構造１６及びサイドパネル１７はともに、支柱１３のシリンダ１３１の高さ範囲に設けられているため、支柱１３の伸長もしくは短縮の挙動を阻害することはない。 Therefore, when the cut piece P of the existing floor slab is removed from the main girder D and moved by the floor slab replacement method of the bridge, the work in the telescopic frame mechanism 10 is performed while passing a general vehicle on the side of the heavy object moving device 100. It is possible to proceed with work in the area. Since both the truss structure 16 and the side panel 17 are provided in the height range of the cylinder 131 of the support column 13, the extension or shortening behavior of the support column 13 is not hindered.

また、サイドパネル１７は、図１で示すように、トレーラー７に載置した際の運転手側もしくは助手席側のいずれか一方を、シリンダ１３１の高さ範囲全体に設置し、他方を、下端側を切欠き１７１を設けておくとよい。これは、既設床版の取替え作業を全段面（横断面全面）で行う方法ではなく、半断面ごとにを取り替える半断面床版取り替え工法に適用する際に好適である。 Further, as shown in FIG. 1, as shown in FIG. 1, one of the driver side and the passenger seat side of the side panel 17 when mounted on the trailer 7 is installed in the entire height range of the cylinder 131, and the other is the lower end. It is preferable to provide a notch 171 on the side. This is suitable when applied to a half-section floor slab replacement method in which the existing floor slab is replaced every half section, not a method in which the replacement work is performed on all steps (the entire cross section).

半断面床版取替え工法は、例えば追い越し車線と走行車線を有する２車線の道路橋Ｂにおいて車線規制を行い、半断面分、つまりコンクリート床版２０２における走行車線側と追い越し車線側のいずれか一方を新設床版に取替え、これと前後して、他方側の半断面分も同様に新設床版に取替える方法である。 In the half-section deck replacement method, for example, lane regulation is performed on a two-lane road bridge B having an overtaking lane and a traveling lane, and one of the half-section portion, that is, the traveling lane side and the passing lane side of the concrete deck 202 is set. It is a method of replacing with a new floor slab, and before and after this, the half section on the other side is also replaced with a new floor slab.

このような半断面床版取替え工法に適用すると、道路橋Ｂの両側各々に設けられた高欄Ｈのうち、図２で示すように、一方が設置されたままの既設床版の切断片Ｐを、サイドパネル１７の切欠き１７１を利用して、伸縮フレーム機構１０の内方空間に設定した作業エリアに取り込んで、撤去作業を行うことができる。 When applied to such a half-section floor slab replacement method, among the balustrades H provided on both sides of the road bridge B, as shown in FIG. 2, the cut piece P of the existing floor slab with one of them still installed is used. By using the notch 171 of the side panel 17, it is possible to take it into the work area set in the inner space of the telescopic frame mechanism 10 and perform the removal work.

その一方で、シリンダ１３１の高さ範囲全体にサイドパネル１７を設けた側は、不慮の事態により作業エリアから機器や切断片Ｐが飛出す現象を抑制できる。したがって、切欠き１７１を設けたサイドパネル１７を利用して、伸縮フレーム機構１０内の作業エリアで切断片Ｐの撤去作業を行いつつ、シリンダ１３１の高さ範囲全体にサイドパネル１７を設けた側の外方で、一般車両を安全に供用させることができる。 On the other hand, the side provided with the side panel 17 over the entire height range of the cylinder 131 can suppress the phenomenon that the device or the cut piece P pops out from the work area due to an unexpected situation. Therefore, the side panel 17 provided with the notch 171 is used to remove the cut piece P in the work area in the telescopic frame mechanism 10, and the side panel 17 is provided over the entire height range of the cylinder 131. It is possible to safely operate a general vehicle outside the cylinder.

≪≪重量物移動装置を用いた重量物の移動方法≫≫
上述する重量物移動装置１００を用いた重量物の移動方法を、上述する橋梁の半断面床版取り替え工法で、既設床版の切断片Ｐを主桁Ｄから撤去し移動する場合、及び施工現場内に仮置きした新設床版片Ｎを、切断片Ｐの撤去移動跡地に配置する場合を事例に挙げ、以下にその手順を説明する。なお、重量物である切断片Ｐは、図７（ａ）で示すように、道路橋Ｂの主桁Ｄ上に設置された状態で、運搬車両Ｃの荷台に積載できる大きさにあらかじめ切断されている。 ≪≪How to move heavy objects using a heavy object moving device≫≫
The method of moving a heavy object using the above-mentioned heavy object moving device 100 is the case where the cut piece P of the existing floor slab is removed from the main girder D and moved by the above-mentioned half-section floor slab replacement method of the bridge, and the construction site. A case where the newly installed floor slab piece N temporarily placed inside is placed at the site where the cut piece P is removed and moved will be taken as an example, and the procedure will be described below. As shown in FIG. 7A, the cut piece P, which is a heavy object, is cut in advance to a size that can be loaded on the loading platform of the transport vehicle C in a state of being installed on the main girder D of the road bridge B. ing.

≪既設床版の切断片Ｐを撤去移動し施工現場から搬出する場合≫
まず、図１で示すように、重量物移動装置１００を解体することなく、門型フレーム１２の支柱１３及び連結梁１４を最も短小化させた状態でトレーラーＴに積載し、道路橋Ｂ上の施工現場に搬入する。 ≪When removing and moving the cut piece P of the existing floor slab and carrying it out from the construction site≫
First, as shown in FIG. 1, the support column 13 and the connecting beam 14 of the gate type frame 12 are loaded on the trailer T in the shortest state without disassembling the heavy object moving device 100, and are loaded on the trailer T on the road bridge B. Bring it to the construction site.

次に、図７（ａ）で示すように、伸縮フレーム機構１０に設けた横行レール１１を道路橋Ｂの橋軸方向に向けた状態で、撤去予定の切断片Ｐを跨ぐ位置に重量物移動装置１００を積載したトレーラーＴを停車させる。そして、門型フレーム１２の支柱１３及び連結梁１４を適宜伸長させて、重量物移動装置１００の伸縮フレーム機構１０を所望の大きさに展開し、道路橋Ｂ上の所定の位置に据え付ける一方で、トレーラーＴは退去させる。この作業と前後してもしくは同時に、揚重機構２０の揚重ホイスト２６に床版撤去装置３０を設置する。 Next, as shown in FIG. 7A, the traverse rail 11 provided in the telescopic frame mechanism 10 is oriented in the direction of the bridge axis of the road bridge B, and the heavy object is moved to a position straddling the cut piece P to be removed. The trailer T loaded with the device 100 is stopped. Then, the support columns 13 and the connecting beams 14 of the portal frame 12 are appropriately extended, the telescopic frame mechanism 10 of the heavy object moving device 100 is expanded to a desired size, and the telescopic frame mechanism 10 is installed at a predetermined position on the road bridge B. , Trailer T is evacuated. Before, after, or at the same time as this work, the floor slab removing device 30 is installed on the lifting hoist 26 of the lifting mechanism 20.

こののち、横行トロリー２１を横行レール１１に沿って走行させて、揚重機構２０を橋軸方向に移動させるとともに、必要に応じて直交トロリー２３を直交レール２２に沿って走行させ、揚重機構２０をさらに橋軸直交方向に移動させ、揚重機構２０に支持されている床版撤去装置３０を、撤去予定の切断片Ｐの上方に位置決めする。 After that, the traversing trolley 21 is traveled along the traversing rail 11, the lifting mechanism 20 is moved in the direction of the bridge axis, and the orthogonal trolley 23 is traveled along the orthogonal rail 22 as necessary. 20 is further moved in the direction orthogonal to the bridge axis, and the deck removing device 30 supported by the lifting mechanism 20 is positioned above the cut piece P to be removed.

こうして、床版撤去装置３０の位置合わせを行ったところで、図７（ｂ）で示すように、揚重機構２０の揚重ホイスト２６を用いて床版撤去装置３０を吊り下ろし、切断片Ｐの上面に積層する。そして、床版撤去装置３０の吊荷用アンカー部材３４を用いて、切断片Ｐと床版撤去装置３０のフレーム３３とを連結する。 When the floor slab removing device 30 was aligned in this way, as shown in FIG. 7B, the floor slab removing device 30 was hung by using the lifting hoist 26 of the lifting mechanism 20, and the cut piece P was hung. Laminate on the top surface. Then, the cut piece P and the frame 33 of the floor slab removing device 30 are connected by using the hanging load anchor member 34 of the floor slab removing device 30.

切断片Ｐにはあらかじめアンカー挿通孔（図示せず）を設けておき、図６（ｂ）で示すように、このアンカー挿通孔に吊荷用アンカー部材３４のアンカーロッド３４１を貫通させて、切断片Ｐの下面に先端ナット３３４で固定する。一方、アンカーロッド３４１の頭部は、フレーム３３の上面にアンカープレート３４２を介して頭部ナット３３３で固定する。 An anchor insertion hole (not shown) is provided in advance in the cutting piece P, and as shown in FIG. 6B, the anchor rod 341 of the suspended load anchor member 34 is passed through the anchor insertion hole to cut the piece P. It is fixed to the lower surface of the piece P with a tip nut 334. On the other hand, the head of the anchor rod 341 is fixed to the upper surface of the frame 33 with a head nut 333 via an anchor plate 342.

こののち、図６（ｃ）で示すように、床版撤去装置３０の反力ジャッキ３５を伸長させ、ピストンロッド３５１の下面で切断片Ｐの周囲を押圧することにより、切断片Ｐがフレーム３３と上昇し、切断片Ｐは主桁から完全に引きはがされる。この状態で、揚重機構２０の揚重ホイスト２６を介して切断片Ｐが連結されたフレーム３３を所定高さまで上昇させる。 After that, as shown in FIG. 6C, the reaction force jack 35 of the floor slab removing device 30 is extended and the lower surface of the piston rod 351 presses the periphery of the cutting piece P so that the cutting piece P becomes the frame 33. And the cut piece P is completely peeled off from the main girder. In this state, the frame 33 to which the cutting pieces P are connected via the lifting hoist 26 of the lifting mechanism 20 is raised to a predetermined height.

本実施の形態では、切断片Ｐの橋軸直交方向の長さを橋軸方向より長大に切断していることから、図８（ａ）で示すように、揚重機構２０の旋回トロリー２５を旋回レール２４に沿って走行させ、床版撤去装置３０及び切断片Ｐの向きを９０度回転し、運搬車両Ｃの荷台に積載する姿勢に転換する。 In the present embodiment, since the length of the cut piece P in the direction orthogonal to the bridge axis is longer than that in the direction of the bridge axis, as shown in FIG. 8A, the swivel trolley 25 of the lifting mechanism 20 is It travels along the swivel rail 24, rotates the direction of the deck removing device 30 and the cutting piece P by 90 degrees, and changes to the posture of loading on the loading platform of the transport vehicle C.

この姿勢の切断片Ｐと床版撤去装置３０を、揚重機構２０の横行トロリー２１を横行レール１１に沿って走行させることにより橋軸方向に移動させ、横行レール１１の一方の端部に設置した積込みホイスト１１２の直下に載置する。 The cut piece P in this posture and the floor slab removing device 30 are moved in the direction of the bridge axis by running the tram trolley 21 of the lifting mechanism 20 along the tram rail 11, and are installed at one end of the tram rail 11. It is placed directly under the loading hoist 112.

吊荷用アンカー部材３４を取り外して切断片Ｐとフレーム３３との連結を解除したのち、揚重機構２０の横行トロリー２１を横行レール１１に走行させて床版撤去装置３０のみを伸縮フレーム機構１０の中ほどへ移動させ、床版撤去装置３０を用いた新たな切断片Ｐの撤去作業を開始する。 After removing the anchor member 34 for suspension and releasing the connection between the cut piece P and the frame 33, the tram trolley 21 of the lifting mechanism 20 is run on the tram rail 11, and only the floor slab removing device 30 is expanded and contracted by the telescopic frame mechanism 10. Move to the middle and start the work of removing the new cut piece P using the floor slab removing device 30.

その一方で、載置された切断片Ｐを、図８（ｂ）で示すように、積込みホイスト１１２を介して所定高さまで吊り上げるとともに、吊り上げられた状態の切断片Ｐの下方に荷台が位置するように運搬車両Ｃを乗り入れ、切断片Ｐを荷台に積載する。こうして、重量物移動装置１００を介して撤去及び移動させた切断片Ｐを、道路橋Ｂから搬出することができる。 On the other hand, as shown in FIG. 8B, the placed cut piece P is lifted to a predetermined height via the loading hoist 112, and the loading platform is located below the cut piece P in the lifted state. In this way, the transport vehicle C is put in, and the cut piece P is loaded on the loading platform. In this way, the cut piece P removed and moved via the heavy object moving device 100 can be carried out from the road bridge B.

≪仮置きした新設床版片Ｎを切断片Ｐの撤去移動跡地に配置する場合≫
上記の手順を繰り返して全ての切断片Ｐを撤去し終わったのち、主桁Ｄ上における切断片Ｐの撤去跡地に、新設床版片Ｎを敷設する。 ≪When placing the temporarily placed new floor slab piece N on the site where the cutting piece P was removed and moved≫
After all the cut pieces P have been removed by repeating the above procedure, a new floor slab piece N is laid on the site where the cut pieces P have been removed on the main girder D.

新設床版片Ｎは、搬送車両Ｃにより施工現場に搬入し、積込みホイスト１１２を利用して搬送車両Ｃの荷台から積込みホイスト１１２の下方における既設床版上に仮置きする。また、揚重機構２０の揚重ホイスト２６から床版撤去装置３０を取り外したうえで、横行トロリー２１を横行レール１１に沿って積込みホイスト１１２の下方まで走行させる。 The new deck piece N is carried into the construction site by the transport vehicle C, and is temporarily placed on the existing deck below the loading hoist 112 from the loading platform of the transport vehicle C using the loading hoist 112. Further, after removing the floor slab removing device 30 from the lifting hoist 26 of the lifting mechanism 20, the tram trolley 21 is loaded along the tram rail 11 and travels below the hoist 112.

次に、図９（ａ）で示すように、仮置きした新設床版片Ｎを揚重機構２０の揚重ホイスト２６を用いて吊持し、横行トロリー２１を横行レール１１に沿って移動させ、伸縮フレーム機構１０の内方空間に設けた作業エリアまで移動させる。切断片Ｐの撤去移動跡地に配置する際の新設床版片Ｎの姿勢は、橋軸直交方向の長さが橋軸方向より長大となるから、揚重機構２０の旋回トロリー２５を旋回レール２４に沿って走行させ、新設床版片Ｎの向きを９０度回転し、主桁Ｄの上面に設置する際の姿勢に転換する。 Next, as shown in FIG. 9A, the temporarily placed new floor slab piece N is suspended by the lifting hoist 26 of the lifting mechanism 20, and the tram trolley 21 is moved along the tram rail 11. , Move to the work area provided in the inner space of the telescopic frame mechanism 10. Since the posture of the newly installed deck piece N when the cut piece P is placed on the site where the cut piece P is removed and moved is longer in the direction orthogonal to the bridge axis than in the direction of the bridge axis, the turning trolley 25 of the lifting mechanism 20 is changed to the turning rail 24. The direction of the new deck piece N is rotated by 90 degrees to change the posture when it is installed on the upper surface of the main girder D.

こののち、必要に応じて、図５で示すように、横行トロリー２１を横行レール１１に沿ってさらに移動させて揚重機構２０を橋軸方向に移動させる。もしくは直交トロリー２３を直交レール２２に沿って走行させて揚重機構２０を橋軸直交方向に移動させる等して、新設床版Ｐの位置を、主桁Ｄ上の設置予定位置に位置決めする。 Then, if necessary, as shown in FIG. 5, the tram trolley 21 is further moved along the tram rail 11 to move the lifting mechanism 20 in the direction of the bridge axis. Alternatively, the orthogonal trolley 23 is moved along the orthogonal rail 22 to move the lifting mechanism 20 in the direction orthogonal to the bridge axis, and the position of the new deck P is positioned at the planned installation position on the main girder D.

こうして、新設床版Ｐの位置合わせを行ったところで、図９（ｂ）で示すように、揚重機構２０の揚重ホイスト２６を用いて新設床版片Ｎを吊り下ろし、主桁Ｄの上面に配置する。 When the new floor slab P was aligned in this way, as shown in FIG. 9B, the new floor slab piece N was hung by using the lifting hoist 26 of the lifting mechanism 20, and the upper surface of the main girder D was hung. Place in.

なお、新設床版片Ｎにはあらかじめ、揚重機構２０の揚重ホイスト２６に取り付け可能な取り付け具を着脱自在に設けて置くとよい。また、切断片Ｐの撤去作業と新設床版片Ｎの配置作業は、伸縮フレーム機構１０の内方空間に設けた作業エリア内に位置する切断Ｐをすべて撤去したのち、新設床版片Ｎを順次設置してもよいし、切断片Ｐの撤去作業と新設床版片Ｎの配置作業とを交互に実施してもよい。 It is preferable that the newly installed floor slab piece N is provided with a detachable attachment that can be attached to the lifting hoist 26 of the lifting mechanism 20 in advance. Further, in the work of removing the cut piece P and the work of arranging the new floor slab piece N, after removing all the cut pieces P located in the work area provided in the inner space of the telescopic frame mechanism 10, the new floor slab piece N is removed. It may be installed sequentially, or the work of removing the cut piece P and the work of arranging the new floor slab piece N may be alternately performed.

上記の作業が終了したのち、重量物移動装置１００を施工現場から搬出する。重量物移動装置１００は解体することなく、門型フレーム１２の支柱１３及び連結梁１４を最も短小化させてトレーラーＴに積載可能な大きさに縮小させたのち、この縮小した重量物移動装置１００をトレーラーＴに積載し施工現場から搬出する。 After the above work is completed, the heavy object moving device 100 is carried out from the construction site. The heavy object moving device 100 is not disassembled, but the column 13 and the connecting beam 14 of the portal frame 12 are minimized to a size that can be loaded on the trailer T, and then the reduced heavy object moving device 100 is used. Is loaded on the trailer T and carried out from the construction site.

上記のとおり、橋梁の床版取り替え工法において、既設床版の切断片Ｐを主桁Ｄから撤去し移動する際に重量物移動装置１００を用いると、切断片Ｐの撤去から搬出までの一連の作業を実施でき、作業効率を大幅に向上させることができる。また、床版撤去装置３０を常時揚重機構２０に支持させておくことができるため、床版撤去装置３０の仮置き場が不要となり、作業エリアを広く確保することが可能となる。 As described above, in the bridge floor slab replacement method, when the heavy object moving device 100 is used to remove and move the cut piece P of the existing floor slab from the main girder D, a series of steps from the removal of the cut piece P to the removal of the cut piece P are performed. The work can be carried out and the work efficiency can be greatly improved. Further, since the floor slab removing device 30 can be constantly supported by the lifting mechanism 20, a temporary storage place for the floor slab removing device 30 becomes unnecessary, and a wide work area can be secured.

また、重量物移動装置１００は、施工現場へ搬出入するたびに、組立てもしくは解体する必要が無く、施工性を大幅に向上することが可能となる。さらに、１台のトレーラＴで搬出入できるため、複数のトレーラーＴを必要とする場合と比較して搬送費用を削減することができ、工期短縮及び工費削減に寄与する寄与することが可能となる。 Further, the heavy object moving device 100 does not need to be assembled or disassembled every time it is carried in and out of the construction site, and the workability can be significantly improved. Further, since it can be carried in and out by one trailer T, the transportation cost can be reduced as compared with the case where a plurality of trailers T are required, and it is possible to contribute to shortening the construction period and reducing the construction cost. ..

また、門型フレーム１２は２本の支柱を備える構造であり、一対の門型フレーム１２より構成される伸縮フレーム機構１０は合計４本の支柱１３を有する構造であるため、小さい設置スペースにも設置することが可能となる。そして、施工現場で重量物移動装置１００を据え付ける際は、門型フレーム１２の支柱１３および連結梁１４を所望の長さに伸長することにより伸縮フレーム機構１０を展開でき、作業エリアとなる内方空間に所望の広さを確保することが可能となる。 Further, since the gantry frame 12 has a structure including two struts, and the telescopic frame mechanism 10 composed of the pair of gantry frames 12 has a structure having a total of four struts 13, even in a small installation space. It can be installed. Then, when installing the heavy object moving device 100 at the construction site, the telescopic frame mechanism 10 can be deployed by extending the support columns 13 and the connecting beams 14 of the portal frame 12 to a desired length, and the inner side becomes a work area. It is possible to secure a desired size in the space.

本発明の重量物移動装置は、上記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲で種々の変更が可能である。 The heavy object moving device of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

例えば、本実施の形態では、切断片Ｐを主桁Ｄから引きはがすべく、重量物移動装置１００の揚重機構２０に床版撤去装置３０を設置し、床版撤去装置３０を利用して切断片Ｐを撤去した。しかし、切断片Ｐが吊り上げるのみで撤去可能な状態にある場合には、床版撤去装置３０を用いることなく揚重機構２０の揚重ホイスト２６を利用して、切断片Ｐを撤去してもよい。 For example, in the present embodiment, the floor slab removing device 30 is installed in the lifting mechanism 20 of the heavy object moving device 100 in order to peel the cut piece P from the main girder D, and the cutting piece P is cut using the floor slab removing device 30. One piece P was removed. However, if the cut piece P is in a state where it can be removed only by lifting it, even if the cut piece P is removed by using the lifting hoist 26 of the lifting mechanism 20 without using the floor slab removing device 30. Good.

また、重量物移動装置で撤去する重量物は、切断片に限定されるものではなく、いずれの重量物にも重量物移動装置を適用することが可能である。 Further, the heavy object to be removed by the heavy object moving device is not limited to the cut piece, and the heavy object moving device can be applied to any heavy object.

さらに、横行レール１１や直交レール２２、横行トロリー２１、直交トロリー２３、旋回トロリー２５等の数量は、いずれも上述した数量に限定されるものではない。 Further, the quantities of the traverse rail 11, the orthogonal rail 22, the tram trolley 21, the orthogonal trolley 23, the swivel trolley 25, and the like are not limited to the above-mentioned quantities.

１００ 重量物移動装置
１０ 伸縮フレーム機構
１１ 横行レール
１１１ チェーンブロック
１１２ 積込みホイスト
１２ 門型フレーム
１２１ ブレース材
１３ 支柱
１３１ シリンダ
１３２ ピストンロッド
１４ 連結梁
１５ 連結トラス
１６ トラス構造
１７ サイドパネル
２０ 揚重機構
２１ 横行トロリー
２２ 直交レール
２３ 直交トロリー
２４ 旋回レール
２５ 旋回トロリー
２５１ 連結材
２６ 揚重ホイスト
３０ 床版撤去装置
３１ 縦材
３２ 横材
３３ フレーム
３４ 吊荷用アンカー部材
３４１ アンカーロッド
３４２ アンカープレート
３４３ 頭部ナット
３４４ 先端ナット
３５ 反力ジャッキ
３５１ ピストンロッド
３５２ シリンダ
Ｔ トレーラー
Ｃ 搬送車両
Ｐ 切断片
Ｈ 高欄
Ｂ 道路橋
Ｄ 主桁
Ｎ 新設床版片 100 Heavy object moving device 10 Telescopic frame mechanism 11 Traverse rail 111 Chain block 112 Loading hoist 12 Gate type frame 121 Brace material 13 Strut 131 Cylinder 132 Piston rod 14 Connecting beam 15 Connecting truss 16 Truss structure 17 Side panel 20 Lifting mechanism 21 Traverse Trolley 22 Orthogonal rail 23 Orthogonal trolley 24 Swivel rail 25 Swivel trolley 251 Connecting material 26 Lifting hoist 30 Deck removal device 31 Vertical material 32 Horizontal material 33 Frame 34 Suspended load anchor member 341 Anchor rod 342 Anchor plate 343 Head nut 344 Tip nut 35 Reaction force jack 351 Piston rod 352 Cylinder T Trailer C Transport vehicle P Cutting piece H Rail B Road bridge D Main girder N New floor slab piece

Claims (5)

横行レールと、該横行レールの両端部近傍に対向して設けられる一対の門型フレームと、前記横行レールに沿って走行する揚重機構と、を備える重量物移動装置により重量物を揚重移動する、重量物移動装置を用いた重量物の移動方法であって、
前記門型フレームが、高さ方向に伸縮自在な一対の支柱と、該支柱の上端部どうしを連結し長手方向に伸縮自在な連結梁と、を備え、
前記支柱と前記連結梁が短小化された状態の前記門型フレームを、展開して据え付ける工程と、
前記重量物を吊持させた状態の前記揚重機構を、前記横行レールに沿って走行させることにより、前記重量物を揚重移動する工程と、
前記支柱と前記連結梁の両者を短小化することにより、前記展開した門型フレームを、最小化する工程と、
を備えることを特徴とする重量物移動装置を用いた重量物の移動方法。 A heavy object moving device including a traversing rail, a pair of gate-shaped frames provided so as to face each other in the vicinity of both ends of the traversing rail, and a lifting mechanism traveling along the traversing rail is used to lift and move a heavy object. This is a method of moving a heavy object using a heavy object moving device.
The gate-shaped frame includes a pair of columns that can be expanded and contracted in the height direction, and a connecting beam that connects the upper ends of the columns and can be expanded and contracted in the longitudinal direction.
A process of deploying and installing the gate-shaped frame in a state where the support column and the connecting beam are shortened, and
A step of lifting and moving the heavy object by running the lifting mechanism in a state where the heavy object is suspended along the traversing rail.
A step of minimizing the developed portal frame by shortening both the support column and the connecting beam.
A method for moving a heavy object using a heavy object moving device. 横行レールと、
該横行レールの両端部近傍に対向して設けられる一対の門型フレームと、
前記横行レールに沿って走行する揚重機構と、
を備える重量物移動装置であって、
前記門型フレームが、
高さ方向に伸縮自在な一対の支柱と、
該支柱の上端部どうしを連結し長手方向に伸縮自在な連結梁と、
を有することを特徴とする重量物移動装置。 Traverse rails and
A pair of gantry frames provided so as to face each other near both ends of the traverse rail,
A lifting mechanism that travels along the traverse rail and
It is a heavy object moving device equipped with
The gate-shaped frame
A pair of columns that can be expanded and contracted in the height direction,
A connecting beam that connects the upper ends of the columns and expands and contracts in the longitudinal direction,
A heavy object moving device characterized by having. 請求項２に記載の重量物移動装置において、
前記横行レールの一方の端部が、対向する一対の前記門型フレームより外方に張り出して設けられ、該横行レールの一方の端部に、積込みホイストが設けられることを特徴とする重量物移動装置。 In the heavy object moving device according to claim 2,
One end of the traversing rail is provided so as to project outward from the pair of opposing portal frames, and a loading hoist is provided at one end of the traversing rail. apparatus. 請求項２または３に記載の重量物移動装置において、
前記横行レールと平行な側面に、サイドパネルが設けられていることを特徴とする重量物移動装置。 In the heavy object moving device according to claim 2 or 3.
A heavy object moving device characterized in that a side panel is provided on a side surface parallel to the traversing rail. 請求項２から４のいずれか１項に記載の重量物移動装置において、
前記揚重機構に、橋梁の主桁から既設床版を引きはがす床版撤去装置が設置されていることを特徴とする重量物移動装置。 In the heavy object moving device according to any one of claims 2 to 4.
A heavy object moving device characterized in that a floor slab removing device for peeling off an existing floor slab from a main girder of a bridge is installed in the lifting mechanism.
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