JP6876573B2 - Suspended scaffolding device - Google Patents

Suspended scaffolding device Download PDF

Info

Publication number
JP6876573B2
JP6876573B2 JP2017154678A JP2017154678A JP6876573B2 JP 6876573 B2 JP6876573 B2 JP 6876573B2 JP 2017154678 A JP2017154678 A JP 2017154678A JP 2017154678 A JP2017154678 A JP 2017154678A JP 6876573 B2 JP6876573 B2 JP 6876573B2
Authority
JP
Japan
Prior art keywords
scaffolding
main girder
bridge
bridge axis
portions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2017154678A
Other languages
Japanese (ja)
Other versions
JP2019031876A (en
Inventor
泰一郎 川森
泰一郎 川森
石川 孝
孝 石川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Infrastructure Systems Co Ltd
Original Assignee
IHI Infrastructure Systems Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IHI Infrastructure Systems Co Ltd filed Critical IHI Infrastructure Systems Co Ltd
Priority to JP2017154678A priority Critical patent/JP6876573B2/en
Publication of JP2019031876A publication Critical patent/JP2019031876A/en
Application granted granted Critical
Publication of JP6876573B2 publication Critical patent/JP6876573B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Bridges Or Land Bridges (AREA)

Description

本発明は、橋脚に支持された橋梁の点検、補修、塗装等を行うための吊り足場装置に関するものである。 The present invention relates to a suspended scaffolding device for inspecting, repairing, painting, etc., a bridge supported by a pier.

従来、例えば一般道、高速道路、鉄道等に用いられる橋梁においては、完成してからの年数の経過に伴い、コンクリート床版にクラックが発生したり、主桁等の鋼材が錆つくなどの劣化を生ずるため、定期的に点検、補修、塗装等を行う必要がある。このような点検等の作業を行う場合、高所作業車を用いて作業する方法もあるが、河川渡河部や急峻な地形など、車両が桁下に乗り入れることが不可能な場所では使用することができなかった。また、高所作業車は作業床としては有効であるが、防護用のシートを張ると風圧を受けて不安定になるため、防護工を施すことが困難であった。 Conventionally, for bridges used for general roads, highways, railways, etc., deterioration such as cracks in concrete decks and rusting of steel materials such as main girders over the years since completion. Therefore, it is necessary to carry out regular inspections, repairs, painting, etc. When performing such inspection work, there is a method of working with an aerial work platform, but use it in places where vehicles cannot get under the girder, such as river crossings and steep terrain. I couldn't. In addition, although the aerial work platform is effective as a work floor, it is difficult to apply protective work because it becomes unstable due to wind pressure when a protective sheet is stretched.

高所作業車を用いる方法以外で安定した作業場を確保するためには桁下に足場を設置することが有効であり、このような足場としては、主桁から作業床を吊り下げるようにしたものが一般的である。しかしながら、橋梁全体に亘って足場を設置するのでは、設置面積、設置・解体時間が増大し、特に点検作業の場合は一箇所当たりの作業頻度が低いため、工期やコストの面で無駄が多いという問題がある。また、主桁に取り付けたレールに沿って足場を橋軸方向に移動させるようにしたものもあるが、橋脚がある場合は一径間内でしか移動できないため、他の径間に移る場合は、一旦解体して再度組み立てなければならなかった。 It is effective to install scaffolding under the girder in order to secure a stable work place other than the method using aerial work platforms, and such scaffolding is such that the work floor is hung from the main girder. Is common. However, if scaffolding is installed over the entire bridge, the installation area and installation / demolition time will increase, and especially in the case of inspection work, the frequency of work per location is low, so there is a lot of waste in terms of construction period and cost. There is a problem. In addition, there are some that move the scaffolding in the direction of the bridge axis along the rail attached to the main girder, but if there is a bridge pedestal, it can only move within one span, so if you move to another span, , I had to disassemble and reassemble.

そこで、橋脚を迂回するように旋回またはスライド可能な足場を用いることにより、高欄等の上部工から足場を吊り下げたまま橋脚の反対側に移動させるようにしたものが知られている(例えば、特許文献1、2または3参照)。 Therefore, it is known that by using a scaffold that can be swiveled or slid so as to bypass the pier, the scaffold is moved to the opposite side of the pier while being suspended from a superstructure such as a balustrade (for example). See Patent Documents 1, 2 or 3).

実公平4−21850号公報Jitsufuku No. 4-21850 特公昭63−65766号公報Special Publication No. 63-65766 特許第4226488号公報Japanese Patent No. 4226488

前述のように足場を吊り下げたまま橋脚の反対側に移動させる場合、各径間に亘って連続して延びるレールを上部工に取り付け、レールに足場を移動自在に吊り下げるようにしているが、足場用のレールを別途取り付けなければならないため、足場設置の際の作業工数を増大させるという問題点があった。また、足場吊り下げ用の部材を高欄側に設置する方法もあるが、この場合は足場吊り下げ用の部材によって道路側のスペースを一部使用するため、車線規制が必要になったり、足場吊り下げ用の部材への車両の衝突も懸念されるという問題点があった。更に、橋脚が上部工より幅広の橋梁では足場吊り下げ用の部材が橋脚を通過することができず、このような橋梁には適用することができないという問題点もあった。 As mentioned above, when moving the scaffolding to the opposite side of the pier while hanging it, a rail that extends continuously over each span is attached to the superstructure so that the scaffolding can be hung on the rail so that it can be moved. Since the rail for scaffolding must be attached separately, there is a problem that the work man-hours for installing the scaffolding are increased. There is also a method of installing the scaffolding hanging member on the balustrade side, but in this case, since the scaffolding hanging member uses a part of the space on the road side, lane regulation is required or the scaffolding is suspended. There is a problem that there is a concern that the vehicle may collide with the lowering member. Further, in a bridge whose pier is wider than the superstructure, the member for suspending the scaffold cannot pass through the pier, and there is a problem that it cannot be applied to such a bridge.

本発明は前記問題点に鑑みてなされたものであり、その目的とするところは、足場を吊り下げるためのレールを橋梁側に別途取り付ける必要がなく、橋脚が上部工よりも幅広の橋梁においても橋脚の反対側へ移動することのできる吊り足場装置を提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is that it is not necessary to separately attach a rail for suspending the scaffolding to the bridge side, and even in a bridge whose piers are wider than the superstructure. The purpose is to provide a suspended scaffolding device that can move to the opposite side of the pier.

本発明は前記目的を達成するために、橋脚に支持された主桁から吊り下げられる足場を備え、橋脚の橋軸方向一端側から他端側に足場を移動可能な吊り足場装置において、互いに橋軸方向に間隔をおいて橋軸直角方向一方に配置され、それぞれ橋軸直角方向に延びる一方の第1及び第2の足場部と、両端をそれぞれ一方の第1の足場部の長手方向一端及び一方の第2の足場部の長手方向一端に水平方向に回動自在に連結され、橋軸方向に延びる一方の第3の足場部と、互いに橋軸方向に間隔をおいて橋軸直角方向他方に配置され、それぞれ橋軸直角方向に延びる他方の第1及び第2の足場部と、両端をそれぞれ他方の第1の足場部の長手方向一端及び他方の第2の足場部の長手方向一端に水平方向に回動自在に連結され、橋軸方向に延びる他方の第3の足場部と、各第1の足場部及び各第2の足場部にそれぞれ設けられ、主桁に着脱自在に係合することにより各第1の足場部及び各第2の足場部を主桁から吊り下げるとともに、各第1の足場部及び各第2の足場部を主桁に係合した状態で主桁に沿って橋軸方向に移動可能な複数の吊下部材とを備え、吊下部材が主桁と係合している各第1の足場部を橋脚の橋軸方向一端側に残した状態で、各第2の足場部の吊下部材と主桁との係合を解除し、各第3の足場部を各第1の足場部に対して回動することにより、各第3の足場部を橋脚の一側方及び他側方にそれぞれ移動させるとともに、各第2の足場部をそれぞれ各第3の足場部に対して回動することにより、各第2の足場部を橋脚の橋軸方向他端側に回り込むように移動させ、橋脚の橋軸方向他端側に移動した各第2の足場部の吊下部材を主桁に係合した後、橋軸方向一端側の各第1の足場部の吊下部材と主桁との係合を解除し、各第3の足場部をそれぞれ各第2の足場部に対して回動するとともに、各第1の足場部をそれぞれ各第3の足場部に対して回動することにより、各第1の足場部及び各第3の足場部を橋脚の橋軸方向他端側に移動させるように構成している。 For the present invention to achieve the above object, comprises a scaffolding suspended from the main girder supported on piers, in suspension scaffold movable anchorage to the other side from the bridge axis direction one end side of the pier, bridge each other One first and second scaffolding portions arranged in one direction perpendicular to the bridge axis at intervals in the axial direction and extending in the direction perpendicular to the bridge axis, respectively, and one end in the longitudinal direction of one of the first scaffolding portions at both ends. One third scaffold that is rotatably connected to one end in the longitudinal direction of one second scaffold and extends in the bridge axis direction, and the other in the direction perpendicular to the bridge axis at intervals in the bridge axis direction. The other first and second scaffolds extending in the direction perpendicular to the bridge axis, and both ends at one end in the longitudinal direction of the other first scaffold and one end in the longitudinal direction of the other second scaffold, respectively. rotatably connected to the horizontal direction, and third scaffold portion of the other extending in the bridge axis direction, provided on each of the first scaffold section and the second scaffold section each detachably engaged with the main girder By doing so, each first scaffolding portion and each second scaffolding portion are hung from the main girder, and each first scaffolding portion and each second scaffolding portion are engaged with the main girder along the main girder. Each of the bridges is provided with a plurality of suspension members that can move in the direction of the bridge axis, and each first scaffold portion in which the suspension member is engaged with the main girder is left on one end side in the bridge axis direction of the bridge pedestal. By disengaging the hanging member of the second scaffolding portion and the main girder and rotating each third scaffolding portion with respect to each first scaffolding portion, each third scaffolding portion is bridged. By moving each of the second scaffolds to one side and the other side, and rotating each second scaffold with respect to each third scaffold, each second scaffold is moved in the direction of the bridge axis of the bridge pedestal, etc. After engaging the hanging members of each of the second scaffolds that have been moved so as to wrap around to the end side and moved to the other end side of the bridge pedestal in the bridge axial direction with the main girder, each first scaffold on the one end side in the bridge axial direction. The hanging member of the portion is disengaged from the main girder, each third scaffold portion is rotated with respect to each second scaffold portion, and each first scaffold portion is rotated with respect to each third scaffold portion. By rotating with respect to the scaffolding portion, each first scaffolding portion and each third scaffolding portion are configured to move to the other end side in the bridge axial direction of the bridge pedestal .

これにより、足場を主桁から吊り下げたまま橋脚の橋軸方向一端側から他端側に移動することができることから、橋軸方向に足場を移動させながら点検等の作業を行うことが可能となる。その際、主桁に係合する複数の吊下部材によって各足場部が主桁から吊り下げられるとともに、一部の足場部の吊下部材と主桁との係合を解除することにより足場を変形させるようにしているので、従来のように足場吊り下げ用の部材を橋梁側に別途取り付ける必要がない。また、吊下部材が主桁に対して着脱されるとともに、各足場部が橋脚を迂回するように水平方向に変形することから、橋脚が上部工より幅広の橋梁にも用いることが可能となる。また、橋軸直角方向一端側の第1、第2及び第3の足場部が橋脚の一側方を介して橋脚の橋軸方向一端側から他端側に移動し、橋軸直角方向他端側の第1、第2及び第3の足場部が橋脚の他側方を介して橋脚の橋軸方向一端側から他端側に移動することから、橋軸方向一端側及び他端側の足場部の長さをそれぞれ短くすることが可能となる。 As a result, the scaffold can be moved from one end side in the bridge axis direction to the other end side of the bridge pier while the scaffold is suspended from the main girder, so that it is possible to perform inspections and the like while moving the scaffold in the bridge axis direction. It becomes. At that time, each scaffolding portion is suspended from the main girder by a plurality of hanging members engaged with the main girder, and the scaffolding is released by disengaging the hanging members of some scaffolding portions from the main girder. Since it is deformed, there is no need to separately attach a scaffolding suspension member to the bridge side as in the past. In addition, since the hanging member is attached to and detached from the main girder and each scaffolding portion is deformed in the horizontal direction so as to bypass the pier, the pier can be used for a bridge wider than the superstructure. .. Further, the first, second and third scaffolds on one end side in the direction perpendicular to the bridge axis move from one end side in the bridge axis direction to the other end side of the pier via one side of the pier, and the other end in the direction perpendicular to the bridge axis. Since the first, second, and third scaffolds on the side move from one end side in the bridge axis direction to the other end side of the pier via the other side of the pier, the scaffolds on one end side and the other end side in the bridge axis direction. It is possible to shorten the length of each part.

本発明によれば、橋軸方向に足場を移動させながら点検等の作業を行うことができるので、橋脚の反対側に移るために足場の解体・再組立を行う必要がなく、点検等の作業を効率よく行うことができるとともに、足場の設置コストを低減することができる。この場合、従来のように足場吊り下げ用の部材を橋梁側に別途取り付ける必要がないので、足場の設置工数を大幅に軽減することができる。また、橋脚が上部工より幅広の橋梁にも用いることができるので、汎用性が高いという利点がある。また、橋軸方向一端側及び他端側の足場部の長さをそれぞれ短くすることができるので、足場部の回動半径を小さくすることができ、橋脚の周囲に障害物がある場合に有利である。 According to the present invention, since it is possible to perform inspections and the like while moving the scaffolding in the direction of the bridge axis, it is not necessary to disassemble and reassemble the scaffolding in order to move to the opposite side of the pier, and the inspections and the like work. It is possible to efficiently perform the above and reduce the installation cost of the scaffolding. In this case, since it is not necessary to separately attach a member for suspending the scaffolding to the bridge side as in the conventional case, the man-hours for installing the scaffolding can be significantly reduced. In addition, since the bridge pedestal can be used for a bridge whose width is wider than that of the superstructure, there is an advantage that it is highly versatile. Further, since the lengths of the scaffolding portions on one end side and the other end side in the bridge axis direction can be shortened, the turning radius of the scaffolding portion can be reduced, which is advantageous when there is an obstacle around the pier. Is.

本発明の前提技術を示す吊り足場装置の正面図Front view of a suspended scaffolding device showing the prerequisite technology of the present invention 足場装置の平面図Top view of scaffolding device 足場装置の要部側面図Side view of the main part of the scaffolding device 足場装置の要部正面図Front view of the main part of the scaffolding device 主桁との係合状態を示す吊下部材の要部正面図Front view of the main part of the hanging member showing the engagement state with the main girder 主桁との係合解除状態を示す吊下部材の要部正面図Front view of the main part of the hanging member showing the disengaged state with the main girder 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 本発明の実施形態に係る足場装置の動作を示す平面図Top view showing operation of scaffolding apparatus which concerns on one Embodiment of this invention 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 前提技術の変形例に係る足場装置の動作を示す平面図Top view showing the operation of the scaffolding device according to the modified example of the prerequisite technology 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device 足場装置の動作を示す平面図Plan view showing the operation of the scaffolding device

図1乃至図12は本発明の前提技術を示すもので、橋脚に支持された橋梁の点検、補修、塗装等を行うための吊り足場装置を示すものである。 1 to 12 show the prerequisite technology of the present invention, and show a suspended scaffolding device for inspecting, repairing, painting, and the like of a bridge supported by a pier.

同図に示す橋梁は、互いに橋軸直角方向に間隔をおいて配置された一対の主桁1と、各主桁1上に設置された床版2と、各主桁1を下方から支持する橋脚3とを備え、主桁1は、ウエブ1aの上端及び下端にそれぞれ上フランジ1b及び下フランジ1cを有する鋼桁からなる。また、ウエブ1aの幅方向一方の面には垂直補鋼材1dが設けられ、垂直補鋼材1dは橋軸方向に間隔をおいて複数箇所に設けられている。 The bridge shown in the figure supports a pair of main girders 1 arranged at right angles to each other in the direction perpendicular to the bridge axis, a deck 2 installed on each main girder 1, and each main girder 1 from below. The main girder 1 includes a bridge pier 3 and is composed of a steel girder having an upper flange 1b and a lower flange 1c at the upper end and the lower end of the web 1a, respectively. Further, a vertical reinforcing steel member 1d is provided on one surface of the web 1a in the width direction, and the vertical reinforcing steel member 1d is provided at a plurality of locations at intervals in the bridge axis direction.

前提技術の吊り足場装置は、互いに橋軸方向に間隔をおいて橋軸直角方向に延びる第1及び第2の足場部10,20と、両端をそれぞれ第1及び第2の足場部10,20の長手方向一端に連結され、橋軸方向に延びる第3の足場部30と、第1及び第2の足場部10,20を各主桁1から吊り下げる複数の吊下部材40とを備えている。 The suspended scaffolding device of the present technology includes the first and second scaffolding portions 10 and 20 extending in the direction perpendicular to the bridge axis at intervals in the bridge axis direction, and the first and second scaffolding portions 10 and 20 at both ends, respectively. A third scaffolding portion 30 connected to one end in the longitudinal direction of the 20 and extending in the bridge axis direction, and a plurality of hanging members 40 for suspending the first and second scaffolding portions 10 and 20 from each main girder 1 are provided. ing.

第1の足場部10は、一方向に長く形成された二つの作業床11を有し、各作業床11は長手方向端部を互いに水平方向に回動自在に連結されている。各作業床11の長手方向一端側と他端側にはそれぞれ半円形の第1及び第2の連結部11a,11bが設けられ、一方の作業床11の第1の連結部11aと他方の作業床11の第2の連結部11bが互いに上下方向に重なり合うとともに、回動支点部11cを中心に幅方向両側に90゜ずつ回動するようになっている。各作業床11の下面には作業床11の撓みを抑制する補強部材11dが設けられ、補強部材11dは作業床11の長手方向に延びるH形の鋼材によって形成されている。各作業床11の補強部材11dは回動支点部11cを介して互いに回動自在に連結されている。また、各作業床11の連結部分以外には柵12が設けられ、各作業床11間の連結部分の隙間には柵12の代わりに鎖13が設けられている。 The first scaffolding portion 10 has two work floors 11 formed long in one direction, and each work floor 11 is rotatably connected to each other in the longitudinal direction end portions. Semi-circular first and second connecting portions 11a and 11b are provided on one end side and the other end side in the longitudinal direction of each work floor 11, respectively, and the first connecting portion 11a of one work floor 11 and the other work. The second connecting portion 11b of the floor 11 overlaps each other in the vertical direction, and rotates 90 ° to both sides in the width direction around the rotation fulcrum portion 11c. A reinforcing member 11d for suppressing the bending of the work floor 11 is provided on the lower surface of each work floor 11, and the reinforcing member 11d is formed of an H-shaped steel material extending in the longitudinal direction of the work floor 11. The reinforcing members 11d of each work floor 11 are rotatably connected to each other via a rotation fulcrum portion 11c. Further, a fence 12 is provided in addition to the connecting portion of each work floor 11, and a chain 13 is provided in place of the fence 12 in the gap of the connecting portion between the work floors 11.

第2の足場部20は、第1の足場部10と同様、一方向に長く形成された二つの作業床21を有し、各作業床21は長手方向端部を互いに水平方向に回動自在に連結されている。この場合、第2の足場部20の各作業床21の長手方向の向きは、第1の足場部10の各作業床11と反対向きになっている。各作業床21の長手方向一端側と他端側にはそれぞれ半円形の第1及び第2の連結部21a,21bが設けられ、一方の作業床21の第2の連結部21bと他方の作業床21の第1の連結部21aが互いに上下方向に重なり合うとともに、回動支点部21cを中心に幅方向両側に90゜ずつ回動するようになっている。各作業床21の下面には作業床21の撓みを抑制する補強部材21dが設けられ、補強部材21dは作業床21の長手方向に延びるH形の鋼材によって形成されている。各作業床21の補強部材21dは回動支点部21cを介して互いに回動自在に連結されている。また、各作業床21の連結部分以外には柵22が設けられ、各作業床21間の連結部分の隙間には柵22の代わりに鎖23が設けられている。 Like the first scaffolding portion 10, the second scaffolding portion 20 has two working floors 21 formed long in one direction, and each working floor portion 21 is rotatable in the longitudinal direction with respect to each other in the longitudinal direction. Is connected to. In this case, the longitudinal direction of each work floor 21 of the second scaffold portion 20 is opposite to that of each work floor 11 of the first scaffold portion 10. Semi-circular first and second connecting portions 21a and 21b are provided on one end side and the other end side in the longitudinal direction of each work floor 21, respectively, and the second connecting portion 21b of one work floor 21 and the other work. The first connecting portions 21a of the floor 21 overlap each other in the vertical direction, and rotate 90 ° to both sides in the width direction around the rotation fulcrum portion 21c. A reinforcing member 21d for suppressing the bending of the work floor 21 is provided on the lower surface of each work floor 21, and the reinforcing member 21d is formed of an H-shaped steel material extending in the longitudinal direction of the work floor 21. The reinforcing members 21d of each work floor 21 are rotatably connected to each other via a rotation fulcrum portion 21c. Further, a fence 22 is provided in addition to the connecting portion of each work floor 21, and a chain 23 is provided in place of the fence 22 in the gap of the connecting portion between the work floors 21.

第3の足場部30は、一方向に長く形成された一つ作業床31を有し、作業床31の長手方向一端は第1の足場部10の長手方向一端に水平方向に回動自在に連結され、作業床31の長手方向他端は第2の足場部20の長手方向一端側に水平方向に回動自在に連結されている。作業床31の長手方向一端側と他端側にはそれぞれ半円形の第1及び第2の連結部31a,31bが設けられ、第1の連結部31aは第1の足場部10の第2の連結部11bと上下方向に重なり合うとともに、回動支点部31cを中心に幅方向両側に90゜ずつ回動するようになっている。一方、作業床31の第2の連結部31bは第2の足場部20の第1の連結部21aと上下方向に重なり合うとともに、回動支点部31dを中心に幅方向両側に90゜ずつ回動するようになっている。作業床31の下面には作業床31の撓みを抑制する補強部材31dが設けられ、補強部材31dは作業床31の長手方向に延びるH形の鋼材によって形成されている。補強部材11dの両端は回動支点部31cを介して第1及び第2の足場部10,20の一端にそれぞれ回動自在に連結されている。また、作業床31の連結部分以外には柵32が設けられ、第1及び第2の足場部10,20との連結部分の隙間には柵32の代わりに鎖33が設けられている。 The third scaffolding portion 30 has one working floor 31 formed long in one direction, and one end in the longitudinal direction of the working floor 31 is rotatably rotatably in the longitudinal direction at one end in the longitudinal direction of the first scaffolding portion 10. The other end of the work floor 31 in the longitudinal direction is rotatably connected in the horizontal direction to one end side in the longitudinal direction of the second scaffolding portion 20. Semi-circular first and second connecting portions 31a and 31b are provided on one end side and the other end side in the longitudinal direction of the work floor 31, respectively, and the first connecting portion 31a is the second of the first scaffolding portion 10. It overlaps with the connecting portion 11b in the vertical direction and rotates 90 ° on both sides in the width direction around the rotation fulcrum portion 31c. On the other hand, the second connecting portion 31b of the work floor 31 overlaps the first connecting portion 21a of the second scaffolding portion 20 in the vertical direction, and rotates 90 ° to both sides in the width direction around the rotation fulcrum portion 31d. It is designed to do. A reinforcing member 31d for suppressing the bending of the work floor 31 is provided on the lower surface of the work floor 31, and the reinforcing member 31d is formed of an H-shaped steel material extending in the longitudinal direction of the work floor 31. Both ends of the reinforcing member 11d are rotatably connected to one ends of the first and second scaffolding portions 10 and 20, respectively, via a rotation fulcrum portion 31c. Further, a fence 32 is provided in addition to the connecting portion of the work floor 31, and a chain 33 is provided in place of the fence 32 in the gap between the connecting portions with the first and second scaffolding portions 10 and 20.

第1、第2及び第3の足場部10,20,30は、互いに連結された作業床11,21,31によってコ字状の連続した足場を形成しており、各作業床11,21,31の連結部分をモータによる電動またはハンドルによる手動で回動することにより、後述するように足場を水平方向に変形することができる。 The first, second, and third scaffolding portions 10, 20, and 30 form a continuous U-shaped scaffold by working floors 11, 21, and 31 connected to each other, and each work floor 11, 21, The scaffold can be deformed in the horizontal direction as described later by rotating the connecting portion of 31 electrically by a motor or manually by a handle.

吊下部材40は、Y字状の支柱41と、主桁1の下フランジ1cに着脱自在に係合する一対の係合部42とからなり、第1及び第2の足場部10,20の各作業床11,21に幅方向一対ずつ設けられている。 The hanging member 40 is composed of a Y-shaped support column 41 and a pair of engaging portions 42 that are detachably engaged with the lower flange 1c of the main girder 1, and the first and second scaffolding portions 10 and 20. A pair of work floors 11 and 21 are provided in the width direction.

係合部42は、主桁1の下フランジ1c上を走行可能な一対の車輪43と、下フランジ1cの側端縁に当接する一対のガイドローラ44と、主桁1の下フランジ1cを把持可能な移動規制手段としての把持部45とを有し、各車輪43の走行によって係合部42を主桁1に沿って橋軸方向に移動させるとともに、把持部45によって下フランジ1cを把持することにより係合部42の移動を任意に規制可能になっている。 The engaging portion 42 grips a pair of wheels 43 capable of traveling on the lower flange 1c of the main girder 1, a pair of guide rollers 44 abutting on the side edge of the lower flange 1c, and the lower flange 1c of the main girder 1. It has a grip portion 45 as a possible movement restricting means, and the engaging portion 42 is moved along the main girder 1 in the bridge axis direction by traveling of each wheel 43, and the lower flange 1c is gripped by the grip portion 45. This makes it possible to arbitrarily regulate the movement of the engaging portion 42.

各車輪43は、互いに橋軸方向に間隔をおいて配置され、それぞれ図示しないモータ等の駆動手段によって回転するようになっている。この場合、車輪43は、図4に示すように垂直補鋼材1dよりも外側を走行するようになっている。 The wheels 43 are arranged at intervals in the bridge axis direction from each other, and are rotated by a driving means such as a motor (not shown). In this case, as shown in FIG. 4, the wheel 43 runs outside the vertical reinforcing steel material 1d.

各ガイドローラ44は、それぞれ各車輪43の近傍に配置され、下フランジ1cの側端縁に当接しながら回動することにより、下フランジ1cに対する吊下部材40の幅方向への移動を規制するようになっている。 Each guide roller 44 is arranged in the vicinity of each wheel 43, and rotates while abutting on the side edge of the lower flange 1c to regulate the movement of the hanging member 40 with respect to the lower flange 1c in the width direction. It has become like.

把持部45は、各車輪43の間に配置され、図5(a) に示すように下フランジ1cを上下方向に挟み込むことにより把持し、図5(b) に示すように下方に開くことにより下フランジ1cの把持を解除するようになっている。把持部45は、周知のジャッキやクランプ等によって構成することができる。 The grip portion 45 is arranged between the wheels 43, grips the lower flange 1c by sandwiching it in the vertical direction as shown in FIG. 5 (a), and opens downward as shown in FIG. 5 (b). The grip of the lower flange 1c is released. The grip portion 45 can be configured by a well-known jack, clamp, or the like.

また、各係合部42は支柱41の上端に主桁1の幅方向に回動自在に取り付けられている。即ち、図6(a) に示すように各係合部42を下フランジ1cの幅方向外側に回動すると、各車輪43及び各ガイドローラ44が下フランジ1cから外れ、各係合部42と下フランジ1cとの係合が解除されるようになっている。その際、図6(b) に示すように下フランジ1cの把持を解除した状態の各把持部45も下フランジ1cから外れるようになっている。尚、各係合部42の回動は、手動で行うようにしてもよいし、モータや油圧装置等の駆動手段を用いるようにしてもよい。この場合、各係合部42を下フランジ1cとの係合状態でロック可能なロック手段を設けてもよい。 Further, each engaging portion 42 is rotatably attached to the upper end of the support column 41 in the width direction of the main girder 1. That is, when each engaging portion 42 is rotated outward in the width direction of the lower flange 1c as shown in FIG. 6A, each wheel 43 and each guide roller 44 are disengaged from the lower flange 1c, and the engaging portion 42 and each engaging portion 42. The engagement with the lower flange 1c is released. At that time, as shown in FIG. 6B, each grip portion 45 in the state where the lower flange 1c is released from being gripped is also detached from the lower flange 1c. The rotation of each engaging portion 42 may be performed manually, or a driving means such as a motor or a hydraulic device may be used. In this case, a locking means that can lock each engaging portion 42 in an engaged state with the lower flange 1c may be provided.

以上のように構成された吊り足場装置は、図7に示すように、第1の足場部10の一方の作業床11が4つの吊下部材40によって一方の主桁1から吊り下げられ、第1の足場部10の他方の作業床11が4つの吊下部材40によって他方の主桁1から吊り下げられる。また、第2の足場部20の一方の作業床21が4つの吊下部材40によって一方の主桁1から吊り下げられ、第2の足場部20の他方の作業床21が4つの吊下部材40によって他方の主桁1から吊り下げられる。これにより、第1、第2及び第3の足場部10,20,30によってコ字状の連続した足場が形成され、作業者Aが各足場部10,20,30上で橋梁の点検、補修、塗装等の作業を行うことができる。尚、図7乃至図12における吊下部材40は、図示を簡略化した四角形であらわすとともに、黒塗りの四角形は吊下部材40の係合部40と主桁1の下フランジ1cとが係合している状態を示し、白塗りの四角形は吊下部材40の係合部40と主桁1の下フランジ1cとの係合が解除されている状態を示す。 In the suspension scaffolding device configured as described above, as shown in FIG. 7, one work floor 11 of the first scaffolding portion 10 is suspended from one main girder 1 by four suspension members 40, and the first The other working floor 11 of the scaffolding portion 10 of 1 is suspended from the other main girder 1 by four hanging members 40. Further, one working floor 21 of the second scaffolding portion 20 is suspended from one main girder 1 by four hanging members 40, and the other working floor 21 of the second scaffolding portion 20 is four hanging members. It is suspended from the other main girder 1 by 40. As a result, the first, second and third scaffolding portions 10, 20 and 30 form a continuous U-shaped scaffolding, and the worker A inspects and repairs the bridge on each scaffolding portion 10, 20 and 30. , Painting, etc. can be performed. The hanging member 40 in FIGS. 7 to 12 is represented by a quadrangle that is simplified in the drawing, and in the black-painted quadrangle, the engaging portion 40 of the hanging member 40 and the lower flange 1c of the main girder 1 are engaged with each other. The white-painted quadrangle indicates the state in which the engaging portion 40 of the hanging member 40 and the lower flange 1c of the main girder 1 are disengaged.

即ち、前記吊り足場装置では、図7に示すように、各吊下部材40によって各主桁1から吊り下げられた足場全体を橋軸方向に移動させることにより、点検等の作業を橋軸方向に移動しながら行うことができる。 That is, in the suspension scaffolding device, as shown in FIG. 7, the entire scaffolding suspended from each main girder 1 by each suspension member 40 is moved in the bridge axis direction, so that work such as inspection can be performed in the bridge axis direction. Can be done while moving to.

ここで、図8に示すように足場が橋脚3の手前まで到達した場合は、以下のように足場を変形させることにより、足場を橋脚3の橋軸方向一端側から他端側に移動する。 Here, when the scaffold reaches the front of the pier 3 as shown in FIG. 8, the scaffold is moved from one end side to the other end side of the pier 3 in the bridge axial direction by deforming the scaffold as follows.

まず、第1の足場部10の各吊下部材40を把持部45によって主桁1に固定し、第2の足場部20の各吊下部材40と主桁1との係合を解除する。次に、図9に示すように第1の足場部10の一端を中心に第2及び第3の足場部20,30を図中時計回りに回動することにより、図10に示すように第1の足場部10を橋脚3の橋軸方向一端側に残した状態で、第3の足場部30を橋脚3の一側方に移動させ、第2の足場部20を橋脚3の橋軸方向他端側に移動させる。これにより、足場が橋脚3を跨ぐように変形する。 First, each hanging member 40 of the first scaffolding portion 10 is fixed to the main girder 1 by the gripping portion 45, and the engagement between each hanging member 40 of the second scaffolding portion 20 and the main girder 1 is released. Next, as shown in FIG. 9, the second and third scaffolding portions 20 and 30 are rotated clockwise in the drawing around one end of the first scaffolding portion 10, as shown in FIG. With the scaffolding portion 10 of 1 left on one end side in the bridge axis direction of the pier 3, the third scaffolding portion 30 is moved to one side of the pier 3, and the second scaffolding portion 20 is moved in the bridge axis direction of the pier 3. Move to the other end side. As a result, the scaffold is deformed so as to straddle the pier 3.

この後、図11に示すように第2の足場部20の各吊下部材40を把持部45によって主桁1に固定するとともに、第1の足場部10の各吊下部材40と主桁1との係合を解除し、第2の足場部20の一端を中心に第1及び第3の足場部10,30を図中時計回りに回動する。これにより、図12に示すように第1及び第3の足場部10,30を橋脚3の橋軸方向他端側に移動させ、各足場部10,20,30の全体を元のコ字状にする。この後、第1の足場部10の各吊下部材40と主桁1とを係合することにより、橋脚3の橋軸方向一端側から他端側への足場の移動が完了し、前述と同様、足場全体を橋軸方向に移動させることにより、点検等の作業を橋軸方向に移動しながら行うことができる。 After that, as shown in FIG. 11, each hanging member 40 of the second scaffolding portion 20 is fixed to the main girder 1 by the gripping portion 45, and each hanging member 40 and the main girder 1 of the first scaffolding portion 10 are fixed. The first and third scaffolding portions 10 and 30 are rotated clockwise in the figure around one end of the second scaffolding portion 20. As a result, as shown in FIG. 12, the first and third scaffolding portions 10 and 30 are moved to the other end side of the pier 3 in the bridge axis direction, and the entire scaffolding portions 10, 20 and 30 are in the original U shape. To. After that, by engaging each hanging member 40 of the first scaffolding portion 10 with the main girder 1, the movement of the scaffolding from one end side to the other end side of the bridge pier 3 in the bridge axis direction is completed, as described above. Similarly, by moving the entire scaffold in the direction of the bridge axis, work such as inspection can be performed while moving in the direction of the bridge axis.

このように、本前提技術の吊り足場装置によれば、吊下部材40が主桁1と係合している第1の足場部10を橋脚3の橋軸方向一端側に残した状態で、第2の足場部20の吊下部材40と主桁1との係合を解除し、第3の足場部30を第1の足場部10に対して回動することにより第3の足場部30を橋脚3の一側方に移動するとともに、第2の足場部20を第3の足場部30に対して回動することにより橋脚3の橋軸方向他端側に移動させ、橋脚3の橋軸方向他端側に移動した第2の足場部20の吊下部材40を主桁1に係合させた後、橋軸方向一端側の第1の足場部10の吊下部材40と主桁1との係合を解除し、第3の足場部30を第1の足場部10に対して回動するとともに、第1の足場部10を第3の足場部30に対して回動することにより、第1及び第3の足場部10,30を橋脚の橋軸方向他端側に移動させるようにしたので、足場を主桁1から吊り下げたまま橋脚3の橋軸方向一端側から他端側に移動することができる。これにより、橋軸方向に足場を移動させながら点検等の作業を行うことができるとともに、橋脚3の反対側に移るために足場の解体・再組立を行う必要がないので、点検等の作業を効率よく行うことができるとともに、足場の設置コストを低減することができる。 As described above, according to the suspension scaffolding device of the present prerequisite technology , the first scaffolding portion 10 in which the suspension member 40 is engaged with the main girder 1 is left on one end side of the pier 3 in the bridge axial direction. The third scaffolding portion 30 is disengaged from the hanging member 40 of the second scaffolding portion 20 and the main girder 1 and the third scaffolding portion 30 is rotated with respect to the first scaffolding portion 10. Is moved to one side of the pier 3, and the second scaffold portion 20 is rotated with respect to the third scaffold portion 30 to move the pier 3 to the other end side in the bridge axial direction, thereby moving the bridge of the pier 3 to the other end side. After engaging the hanging member 40 of the second scaffolding portion 20 that has moved to the other end side in the axial direction with the main girder 1, the hanging member 40 and the main girder of the first scaffolding portion 10 on the one end side in the bridge axial direction Disengaging the engagement with 1, rotating the third scaffolding portion 30 with respect to the first scaffolding portion 10, and rotating the first scaffolding portion 10 with respect to the third scaffolding portion 30. As a result, the first and third scaffolding portions 10 and 30 are moved to the other end side of the pier in the bridge axis direction. Therefore, while the pier is suspended from the main girder 1, the bridge pier 3 is moved from one end side in the bridge axis direction to the other. Can be moved to the edge side. As a result, it is possible to perform inspections and the like while moving the scaffolding in the direction of the bridge axis, and it is not necessary to disassemble and reassemble the scaffolding in order to move to the opposite side of the pier 3, so that the inspections and the like can be performed. It can be done efficiently and the scaffolding installation cost can be reduced.

この場合、主桁1に係合する複数の吊下部材40によって各足場部10,20,30を主桁1から吊り下げるとともに、第1及び第2の足場部10,20のうち一方の吊下部材40と主桁1との係合を解除することにより足場を変形させるようにしたので、従来のように足場吊り下げ用の部材を橋梁側に別途取り付ける必要がなく、足場の設置工数を大幅に軽減することができる。また、従来では、橋脚が上部工より幅広の橋梁では足場吊り下げ用の部材が橋脚を通過することができず、このような橋梁には適用することができなかったが、本前提技術では、吊下部材40を主桁1に対して着脱するとともに、各足場部10,20,30が橋脚3を迂回するように水平方向に変形するので、橋脚が上部工より幅広であっても適用することができ、汎用性が高いという利点がある。 In this case, the scaffolding portions 10, 20, and 30 are suspended from the main girder 1 by a plurality of hanging members 40 engaged with the main girder 1, and one of the first and second scaffolding portions 10, 20 is suspended. Since the scaffolding is deformed by disengaging the lower member 40 and the main girder 1, it is not necessary to separately attach the scaffolding suspension member to the bridge side as in the conventional case, and the man-hours for installing the scaffolding can be reduced. It can be significantly reduced. Further, in the conventional, piers can not members for hanging scaffold passes piers in wider bridges than superstructure, but can not be applied to such bridges, the present underlying technique, Since the suspension member 40 is attached to and detached from the main girder 1 and the scaffolding portions 10, 20 and 30 are deformed in the horizontal direction so as to bypass the pier 3, it is applicable even if the pier is wider than the superstructure. It has the advantage of being highly versatile.

また、第1及び第2の足場部10,20は、互いに回動自在に連結された複数の作業床11,21を有しているので、第1及び第2の足場部10,20を回動する際、各作業床11,21同士を回動することにより、橋脚3の側方への第1及び第2の足場部10,20の回動半径を小さくすることができ、橋脚3の周囲に障害物がある場合に有利である。 Further, since the first and second scaffolding portions 10 and 20 have a plurality of work floors 11 and 21 rotatably connected to each other, the first and second scaffolding portions 10 and 20 are rotated. By rotating each of the work floors 11 and 21 when moving, the radius of rotation of the first and second scaffolding portions 10 and 20 to the side of the pier 3 can be reduced, and the pier 3 can be moved. This is advantageous when there are obstacles in the surrounding area.

更に、吊下部材40は、主桁1の下フランジ1cに着脱自在に係合する係合部42を有しているので、足場設置用の専用部材を橋梁側に別途設ける必要がなく、足場の設置に要する部材や工数を少なくすることができる。この場合、係合部42は下フランジ1cの幅方向に回動することにより下フランジ1cに着脱することから、下フランジ1cへの係合及び係合解除を容易に行うことができる。 Further, since the hanging member 40 has an engaging portion 42 that is detachably engaged with the lower flange 1c of the main girder 1, it is not necessary to separately provide a dedicated member for scaffolding installation on the bridge side, and the scaffolding. It is possible to reduce the number of members and man-hours required for installation. In this case, since the engaging portion 42 is attached to and detached from the lower flange 1c by rotating in the width direction of the lower flange 1c, it is possible to easily engage and disengage the lower flange 1c.

また、係合部42には、主桁1の下フランジ上1bを走行することにより係合部42を主桁1に沿って移動させる車輪43が設けられているので、吊下部材40を常に円滑に移動させることができる。 Further, since the engaging portion 42 is provided with a wheel 43 that moves the engaging portion 42 along the main girder 1 by traveling on the lower flange 1b of the main girder 1, the hanging member 40 is always provided. It can be moved smoothly.

更に、係合部42には、係合部42の移動を任意に規制可能な把持部45が設けられているので、一部の足場部10,20,30を移動させる際に他の足場部10,20,30を主桁1に確実に固定しておくことができ、足場変形時の安全性を高めることができる。 Further, since the engaging portion 42 is provided with a grip portion 45 capable of arbitrarily restricting the movement of the engaging portion 42, another scaffolding portion is provided when moving some of the scaffolding portions 10, 20 and 30. 10, 20, and 30 can be securely fixed to the main girder 1, and safety at the time of scaffold deformation can be enhanced.

尚、前記前提技術では、吊下部材40の車輪43が主桁1の下フランジ1c上を走行するようにしたものを示したが、下フランジ1c上に歯付きレールを設置し、歯付きレールに噛み合う歯車を車輪43に代えて設けるようにすれば、下フランジ1cに対して滑りを生ずることなく吊下部材40を移動させることができる。 In the above-mentioned prerequisite technology , the wheel 43 of the hanging member 40 is shown to run on the lower flange 1c of the main girder 1, but a toothed rail is installed on the lower flange 1c and the toothed rail is installed. If a gear that meshes with the wheel 43 is provided instead of the wheel 43, the suspension member 40 can be moved without causing slippage with respect to the lower flange 1c.

図13乃至図18は本発明の実施形態を示すもので、前記前提技術と同等の構成部分には同一の符号を付して示す。 13 to 18 show an embodiment of the present invention, and the same components as those of the prerequisite technique are designated by the same reference numerals.

本実施形態では、左右両側の各主桁1側に配置される第1、第2及び第3の足場部10,20,30を橋軸直角方向に一対ずつ備え、橋軸直角方向一方の第1、第2及び第3の足場部10,20,30を橋脚3の一側方を介して橋脚3の橋軸方向一端側から他端側に移動させ、橋軸直角方向他方の第1、第2及び第3の足場部10,20,30を橋脚3の他側方を介して橋脚3の橋軸方向一端側から他端側に移動させるようになっている。この場合、各第1及び第2の足場部10,20は、それぞれ作業床11,21を一つずつ有し、各第1の足場部10の作業床11同士、各第2の足場部20同士は、それぞれ着脱自在に連結されている。 In the present embodiment, a pair of first, second and third scaffolding portions 10, 20 and 30 arranged on the 1 side of each main girder on both the left and right sides are provided in the direction perpendicular to the bridge axis, and the first one in the direction perpendicular to the bridge axis. The first, second and third scaffolding portions 10, 20 and 30 are moved from one end side in the bridge axis direction to the other end side of the pier 3 via one side of the pier 3, and the other first, in the direction perpendicular to the bridge axis. The second and third scaffolding portions 10, 20, and 30 are moved from one end side to the other end side of the pier 3 in the bridge axial direction via the other side of the pier 3. In this case, each of the first and second scaffolding portions 10 and 20 has one work floor 11 and 21 respectively, and the work floors 11 of each of the first scaffolding portions 10 and the second scaffolding portions 20 each. They are detachably connected to each other.

尚、図示を省略したが、本実施形態の各足場部10,20,30には、前記前提技術と同様の柵及び鎖が設けられている。 Although not shown, the scaffolding portions 10, 20, and 30 of the present embodiment are provided with fences and chains similar to those of the above-mentioned prerequisite technology.

本実施形態の吊り足場装置は、図13に示すように、一方の第1の足場部10の作業床11が4つの吊下部材40によって一方の主桁1から吊り下げられ、第1の足場部10の他方の作業床11が4つの吊下部材40によって他方の主桁1から吊り下げられる。また、第2の足場部20の一方の作業床21が4つの吊下部材40によって一方の主桁1から吊り下げられ、第2の足場部20の他方の作業床21が4つの吊下部材40によって他方の主桁1から吊り下げられる。これにより、各第1、第2及び第3の足場部10,20,30によって四角形状の連続した足場が形成され、作業者Aが各足場部10,20,30上で橋梁の点検、補修、塗装等の作業を行うことができる。尚、図13乃至図18における吊下部材40は、図示を簡略化した四角形であらわすとともに、黒塗りの四角形は吊下部材40の係合部40と主桁1の下フランジ1cとが係合している状態を示し、白塗りの四角形は吊下部材40の係合部40と主桁1の下フランジ1cとの係合が解除されている状態を示す。 In the suspension scaffolding device of the present embodiment, as shown in FIG. 13, the work floor 11 of one first scaffolding portion 10 is suspended from one main girder 1 by four suspension members 40, and the first scaffolding The other working floor 11 of the portion 10 is suspended from the other main girder 1 by four hanging members 40. Further, one working floor 21 of the second scaffolding portion 20 is suspended from one main girder 1 by four hanging members 40, and the other working floor 21 of the second scaffolding portion 20 is four hanging members. It is suspended from the other main girder 1 by 40. As a result, a continuous square-shaped scaffold is formed by the first, second, and third scaffolds 10, 20, and 30, and the worker A inspects and repairs the bridge on the scaffolds 10, 20, and 30. , Painting, etc. can be performed. The hanging member 40 in FIGS. 13 to 18 is represented by a quadrangle that is simplified in the drawing, and in the black-painted quadrangle, the engaging portion 40 of the hanging member 40 and the lower flange 1c of the main girder 1 are engaged with each other. The white-painted quadrangle indicates the state in which the engaging portion 40 of the hanging member 40 and the lower flange 1c of the main girder 1 are disengaged.

即ち、前記吊り足場装置では、図13に示すように、各吊下部材40によって各主桁1から吊り下げられた足場全体を橋軸方向に移動させることにより、点検等の作業を橋軸方向に移動しながら行うことができる。 That is, in the suspension scaffolding device, as shown in FIG. 13, the entire scaffolding suspended from each main girder 1 by each suspension member 40 is moved in the bridge axis direction, so that work such as inspection can be performed in the bridge axis direction. Can be done while moving to.

ここで、図14に示すように足場が橋脚3の手前まで到達した場合は、以下のように足場を変形させることにより、足場を橋脚3の橋軸方向一端側から他端側に移動する。 Here, when the scaffold reaches the front of the pier 3 as shown in FIG. 14, the scaffold is moved from one end side to the other end side of the pier 3 in the bridge axial direction by deforming the scaffold as follows.

まず、各第1の足場部10の吊下部材40を把持部45によって主桁1に固定し、各第2の足場部20の吊下部材40と主桁1との係合を解除するとともに、各第2の足場部20同士の連結を解除する。次に、図15に示すように各第1の足場部10の一端を中心に各第2及び第3の足場部20,30をそれぞれ図中時計回り及び反時計回りに回動することにより、図16に示すように各第1の足場部10を橋脚3の橋軸方向一端側に残した状態で、各第3の足場部30を橋脚3の一側方及び他側方にそれぞれ移動させるとともに、各第2の足場部20をそれぞれ橋脚3の橋軸方向他端側に移動させ、各第2の足場部20同士を連結する。これにより、足場が橋脚3を囲むように変形する。 First, the hanging member 40 of each first scaffolding portion 10 is fixed to the main girder 1 by the gripping portion 45, and the engagement between the hanging member 40 of each second scaffolding portion 20 and the main girder 1 is released. , The connection between each of the second scaffolding portions 20 is released. Next, as shown in FIG. 15, by rotating the second and third scaffolding portions 20 and 30 around one end of each first scaffolding portion 10 clockwise and counterclockwise in the drawing, respectively. As shown in FIG. 16, with each first scaffolding portion 10 left on one end side of the pier 3 in the bridge axial direction, each third scaffolding portion 30 is moved to one side and the other side of the pier 3, respectively. At the same time, each of the second scaffolding portions 20 is moved to the other end side of the pier 3 in the bridge axis direction, and the second scaffolding portions 20 are connected to each other. As a result, the scaffold is deformed so as to surround the pier 3.

この後、各第2の足場部20の吊下部材40を把持部45によって主桁1に固定し、各第1の足場部10の吊下部材40と主桁1との係合を解除するとともに、各第1の足場部10同士の連結を解除する。続いて、図17に示すように各第2の足場部20の一端を中心に各第1及び第3の足場部10,30をそれぞれ図中時計回り及び反時計回りに回動することにより、図18に示すように各第1及び第3の足場部10,30を橋脚3の橋軸方向他端側に移動させ、各足場部10,20,30の全体を元の四角形状にする。この後、各第1の足場部10の吊下部材40と主桁1とを係合するとともに、各第1の足場部10同士を連結することにより、橋脚3の橋軸方向一端側から他端側への足場の移動が完了し、前述と同様、足場全体を橋軸方向に移動させることにより、点検等の作業を橋軸方向に移動しながら行うことができる。 After that, the hanging member 40 of each second scaffolding portion 20 is fixed to the main girder 1 by the gripping portion 45, and the engagement between the hanging member 40 of each first scaffolding portion 10 and the main girder 1 is released. At the same time, the connection between the first scaffolding portions 10 is released. Subsequently, as shown in FIG. 17, the first and third scaffolding portions 10 and 30 are rotated around one end of each second scaffolding portion 20 in the clockwise and counterclockwise directions in the drawing, respectively. As shown in FIG. 18, the first and third scaffolding portions 10 and 30 are moved to the other end side of the pier 3 in the bridge axis direction, and the entire scaffolding portions 10, 20 and 30 are made into the original square shape. After that, by engaging the hanging member 40 of each first scaffolding portion 10 with the main girder 1 and connecting the first scaffolding portions 10 to each other, the bridge pier 3 is connected from one end side in the bridge axial direction to the other. The movement of the scaffold to the end side is completed, and as described above, by moving the entire scaffold in the direction of the bridge axis, work such as inspection can be performed while moving in the direction of the bridge axis.

このように、本実施形態によれば、第1、第2及び第3の足場部10,20,30を橋軸直角方向に一対ずつ備え、橋軸直角方向一端側の第1、第2及び第3の足場部10,20,30を橋脚3の一側方を介して橋脚3の橋軸方向一端側から他端側に移動させ、橋軸直角方向他端側の第1、第2及び第3の足場部10,20,30を橋脚3の他側方を介して橋脚3の橋軸方向一端側から他端側に移動させるようにしたので、各第1、第2及び第3の足場部10,20,30の長さをそれぞれ短くすることができる。これにより、第1の足場部10または第2の足場部20を回動する際、橋脚3の側方への各第1及び第2の足場部10,20の回動半径をそれぞれ小さくすることができ、橋脚3の周囲に障害物がある場合に有利である。 As described above, according to the present embodiment, the first, second, and third scaffolding portions 10, 20, and 30 are provided in pairs in the direction perpendicular to the bridge axis, and the first, second, and one end sides in the direction perpendicular to the bridge axis are provided. The third scaffolding portions 10, 20, and 30 are moved from one end side in the bridge axis direction to the other end side of the pier 3 via one side of the pier 3, and the first, second, and the other end side in the direction perpendicular to the bridge axis. Since the third scaffolding portions 10, 20, and 30 are moved from one end side to the other end side of the pier 3 in the bridge axis direction via the other side of the pier 3, the first, second, and third scaffolds, respectively, The lengths of the scaffolding portions 10, 20, and 30 can be shortened, respectively. As a result, when rotating the first scaffolding portion 10 or the second scaffolding portion 20, the turning radii of the first and second scaffolding portions 10 and 20 to the side of the pier 3 are reduced, respectively. This is advantageous when there are obstacles around the pier 3.

図19乃至図26は前提技術の変形例を示すもので、前記前提技術と同等の構成部分には同一の符号を付して示す。 19 to 26 show modifications of the prerequisite technology, and the same components as those of the prerequisite technology are designated by the same reference numerals.

変形例の第1の足場部10は、前記前提技術の各作業床11に代えて、互いに長手方向に移動自在に連結された二つの作業床14を有している。この場合、一方の作業床14は前記前提技術と同様、一端を第3の足場部30の一端に回動自在に連結されている。 The first scaffolding portion 10 of the present modification has two work floors 14 that are movably connected to each other in the longitudinal direction instead of the work floors 11 of the above-mentioned prerequisite technology. In this case, one end of the work floor 14 is rotatably connected to one end of the third scaffolding portion 30, as in the above-mentioned prerequisite technique.

また、本変形例の第2の足場部20は、前記前提技術の各作業床21に代えて、互いに長手方向に移動自在に連結された二つの作業床24を有している。この場合、一方の作業床24は前記前提技術と同様、一端を第3の足場部30の他端に回動自在に連結されている。 Further, the second scaffolding portion 20 of the present modification has two work floors 24 that are movably connected to each other in the longitudinal direction instead of the work floors 21 of the prerequisite technology. In this case, one end of the work floor 24 is rotatably connected to the other end of the third scaffolding portion 30, as in the above-mentioned prerequisite technique.

尚、図示を省略したが、本変形例の各足場部10,20,30には、前記前提技術と同様の柵及び鎖が設けられている。 Although not shown, the scaffolding portions 10, 20, and 30 of this modified example are provided with fences and chains similar to those of the above-mentioned prerequisite technique.

変形例の吊り足場装置は、図19に示すように、第1の足場部10の一方の作業床11が4つの吊下部材40によって一方の主桁1から吊り下げられ、第1の足場部10の他方の作業床14が4つの吊下部材40によって他方の主桁1から吊り下げられる。また、第2の足場部20の一方の作業床21が4つの吊下部材40によって一方の主桁1から吊り下げられ、第2の足場部20の他方の作業床24が4つの吊下部材40によって他方の主桁1から吊り下げられる。これにより、第1、第2及び第3の足場部10,20,30によってコ字状の連続した足場が形成され、作業者が各足場部10,20,30上で橋梁の点検、補修、塗装等の作業を行うことができる。尚、図19乃至図26における吊下部材40は、図示を簡略化して四角形であらわすとともに、黒塗りの四角形は吊下部材40の係合部40と主桁1の下フランジ1cとが係合している状態を示し、白塗りの四角形は吊下部材40の係合部40と主桁1の下フランジ1cとの係合が解除されている状態を示す。 In the suspension scaffolding device of this modification , as shown in FIG. 19, one work floor 11 of the first scaffolding portion 10 is suspended from one main girder 1 by four suspension members 40, and the first scaffolding The other working floor 14 of the portion 10 is suspended from the other main girder 1 by four hanging members 40. Further, one working floor 21 of the second scaffolding portion 20 is suspended from one main girder 1 by four hanging members 40, and the other working floor 24 of the second scaffolding portion 20 is four hanging members. It is suspended from the other main girder 1 by 40. As a result, the first, second and third scaffolding portions 10, 20 and 30 form a continuous U-shaped scaffolding, and the operator can inspect and repair the bridge on each scaffolding portion 10, 20 and 30. Can perform work such as painting. The hanging member 40 in FIGS. 19 to 26 is represented by a quadrangle for simplification of the drawing, and in the black-painted quadrangle, the engaging portion 40 of the hanging member 40 and the lower flange 1c of the main girder 1 are engaged with each other. The white-painted quadrangle indicates the state in which the engaging portion 40 of the hanging member 40 and the lower flange 1c of the main girder 1 are disengaged.

即ち、前記吊り足場装置では、図19に示すように、各吊下部材40によって各主桁1から吊り下げられた足場全体を橋軸方向に移動させることにより、点検等の作業を橋軸方向に移動しながら行うことができる。 That is, in the suspended scaffolding device, as shown in FIG. 19, the entire scaffolding suspended from each main girder 1 by each suspension member 40 is moved in the bridge axis direction, so that work such as inspection can be performed in the bridge axis direction. Can be done while moving to.

ここで、図20に示すように足場が橋脚3の手前まで到達した場合は、以下のように足場を変形させることにより、足場を橋脚3の橋軸方向一端側から他端側に移動する。 Here, when the scaffold reaches the front of the pier 3 as shown in FIG. 20, the scaffold is moved from one end side to the other end side of the pier 3 in the bridge axial direction by deforming the scaffold as follows.

まず、第1の足場部10の各吊下部材40を把持部45によって主桁1に固定し、図20に示すように第2の足場部20の他方の作業床24の吊下部材40と主桁1との係合を解除するとともに、第2の足場部20の他方の作業床24を一方の作業床21側に移動する。次に、図21に示すように第1の足場部10の一端を中心に第2及び第3の足場部20,30を図中時計回りに回動することにより、第1の足場部10を橋脚3の橋軸方向一端側に残した状態で、第3の足場部30を橋脚3の一側方に移動させ、第2の足場部20を橋脚3の橋軸方向他端側に移動させる。これにより、足場が橋脚3を跨ぐように変形する。 First, each hanging member 40 of the first scaffolding portion 10 is fixed to the main girder 1 by the gripping portion 45, and as shown in FIG. 20, with the hanging member 40 of the other work floor 24 of the second scaffolding portion 20. The engagement with the main girder 1 is released, and the other working floor 24 of the second scaffolding portion 20 is moved to the one working floor 21 side. Next, as shown in FIG. 21, the first scaffolding portion 10 is formed by rotating the second and third scaffolding portions 20 and 30 clockwise around one end of the first scaffolding portion 10 in the drawing. The third scaffolding portion 30 is moved to one side of the pier 3 and the second scaffolding portion 20 is moved to the other end side of the pier 3 in the bridge axial direction while being left on one end side of the pier 3 in the bridge axial direction. .. As a result, the scaffold is deformed so as to straddle the pier 3.

この後、図22に示すように第2の足場部20の他方の作業床24を一方の作業床24から延出するように移動するとともに、第2の足場部20の各吊下部材40を把持部45によって主桁1に固定する。続いて、図23に示すように第1の足場部10の他方の作業床14の吊下部材40と主桁1との係合を解除するとともに、第1の足場部10の他方の作業床14を一方の作業床11側に移動する。次に、図24に示すように、第2の足場部20の一端を中心に第1及び第3の足場部10,30を図中時計回りに回動することにより、第1及び第3の足場部10,30を橋脚3の橋軸方向他端側に移動させるとともに、図25に示すように第1の足場部10の一方の作業床11の吊下部材40と主桁1とを係合するとともに、第1の足場部10の他方の作業床14を一方の作業床14から延出するように移動することにより、各足場部10,20,30の全体を元のコ字状にする。この後、図26に示すように第1の足場部10の他方の作業床14の吊下部材40と主桁1とを係合することにより、橋脚3の橋軸方向一端側から他端側への足場の移動が完了し、前述と同様、足場全体を橋軸方向に移動させることにより、点検等の作業を橋軸方向に移動しながら行うことができる。 After that, as shown in FIG. 22, the other working floor 24 of the second scaffolding portion 20 is moved so as to extend from the one working floor 24, and each hanging member 40 of the second scaffolding portion 20 is moved. It is fixed to the main girder 1 by the grip portion 45. Subsequently, as shown in FIG. 23, the hanging member 40 of the other work floor 14 of the first scaffolding portion 10 and the main girder 1 are disengaged, and the other working floor of the first scaffolding portion 10 is released. 14 is moved to one work floor 11 side. Next, as shown in FIG. 24, by rotating the first and third scaffolding portions 10 and 30 clockwise around one end of the second scaffolding portion 20, the first and third scaffolding portions 10 and 30 are rotated clockwise. The scaffolding portions 10 and 30 are moved to the other end side of the bridge pedestal 3 in the bridge axial direction, and as shown in FIG. 25, the suspension member 40 of one work floor 11 of the first scaffolding portion 10 and the main girder 1 are engaged. At the same time, by moving the other working floor 14 of the first scaffolding portion 10 so as to extend from the one working floor 14, the entire scaffolding portions 10, 20 and 30 are returned to the original U shape. To do. After that, as shown in FIG. 26, by engaging the hanging member 40 of the other work floor 14 of the first scaffolding portion 10 with the main girder 1, the bridge pier 3 is from one end side to the other end side in the bridge axial direction. After the movement of the scaffold to the bridge is completed, the entire scaffold can be moved in the direction of the bridge axis as described above, so that work such as inspection can be performed while moving in the direction of the bridge axis.

このように、本変形例によれば、第1及び第2の足場部10,20が互いに長手方向に移動自在に連結された複数の作業床14,24を有しているので、第1及び第2の足場部10,20を回動する際、各作業床14,24を移動して長さを短くすることにより、橋脚3の側方への第1及び第2の足場部10,20の回動半径を小さくすることができ、橋脚3の周囲に障害物がある場合に有利である。 As described above, according to the present modification , since the first and second scaffolding portions 10 and 20 have a plurality of work floors 14 and 24 movably connected to each other in the longitudinal direction, the first and second scaffolding portions 10 and 20 are connected. When rotating the second scaffolding portions 10 and 20, the first and second scaffolding portions 10 and 20 to the side of the pier 3 are shortened by moving the work floors 14 and 24 respectively. The turning radius of the bridge 3 can be reduced, which is advantageous when there is an obstacle around the pier 3.

1…主桁、2…床版、3…橋脚、10…第1の足場部、11,14…作業床、20…第2の足場部、21,24…作業床、30…第3の足場部、31…作業床、40…吊下部材、42…係合部、43…車輪、45…把持部。 1 ... main girder, 2 ... floor slab, 3 ... pier, 10 ... first scaffold, 11, 14 ... work floor, 20 ... second scaffold, 21, 24 ... work floor, 30 ... third scaffold Part, 31 ... work floor, 40 ... hanging member, 42 ... engaging part, 43 ... wheel, 45 ... gripping part.

Claims (7)

橋脚に支持された主桁から吊り下げられる足場を備え、橋脚の橋軸方向一端側から他端側に足場を移動可能な吊り足場装置において、
互いに橋軸方向に間隔をおいて橋軸直角方向一方に配置され、それぞれ橋軸直角方向に延びる一方の第1及び第2の足場部と、
両端をそれぞれ一方の第1の足場部の長手方向一端及び一方の第2の足場部の長手方向一端に水平方向に回動自在に連結され、橋軸方向に延びる一方の第3の足場部と、
互いに橋軸方向に間隔をおいて橋軸直角方向他方に配置され、それぞれ橋軸直角方向に延びる他方の第1及び第2の足場部と、
両端をそれぞれ他方の第1の足場部の長手方向一端及び他方の第2の足場部の長手方向一端に水平方向に回動自在に連結され、橋軸方向に延びる他方の第3の足場部と、
各第1の足場部及び各第2の足場部にそれぞれ設けられ、主桁に着脱自在に係合することにより各第1の足場部及び各第2の足場部を主桁から吊り下げるとともに、各第1の足場部及び各第2の足場部を主桁に係合した状態で主桁に沿って橋軸方向に移動可能な複数の吊下部材とを備え、
吊下部材が主桁と係合している各第1の足場部を橋脚の橋軸方向一端側に残した状態で、各第2の足場部の吊下部材と主桁との係合を解除し、各第3の足場部を各第1の足場部に対して回動することにより、各第3の足場部を橋脚の一側方及び他側方にそれぞれ移動させるとともに、各第2の足場部をそれぞれ各第3の足場部に対して回動することにより、各第2の足場部を橋脚の橋軸方向他端側に回り込むように移動させ、橋脚の橋軸方向他端側に移動した各第2の足場部の吊下部材を主桁に係合した後、橋軸方向一端側の各第1の足場部の吊下部材と主桁との係合を解除し、各第3の足場部をそれぞれ各第2の足場部に対して回動するとともに、各第1の足場部をそれぞれ各第3の足場部に対して回動することにより、各第1の足場部及び各第3の足場部を橋脚の橋軸方向他端側に移動させるように構成した
ことを特徴とする吊り足場装置。
In a suspended scaffolding device that has a scaffolding that is suspended from the main girder supported by the pier and can move the scaffolding from one end side to the other end side in the bridge axis direction of the pier.
The first and second scaffolds, which are arranged in the direction perpendicular to the bridge axis at right angles to each other in the direction of the bridge axis and extend in the direction perpendicular to the bridge axis, respectively.
Both ends are rotatably connected horizontally to one end of the first scaffolding portion in the longitudinal direction and one end in the longitudinal direction of the second scaffolding portion, respectively, and the third scaffolding portion extending in the direction of the bridge axis. ,
The other first and second scaffolds, which are arranged on the other side in the direction perpendicular to the bridge axis at right angles to each other in the direction of the bridge axis and extend in the direction perpendicular to the bridge axis, respectively.
Both ends are rotatably connected to one end in the longitudinal direction of the other first scaffold and one end in the longitudinal direction of the other second scaffold, respectively, and the other third scaffold extending in the direction of the bridge axis. ,
Each of the first scaffold section and provided on each of the second scaffold section each, with hang the first scaffold section and the second scaffold section each from the main girder by engaging detachably in a main girder, It is provided with a plurality of hanging members that can move in the bridge axis direction along the main girder with each first scaffolding portion and each second scaffolding portion engaged with the main girder.
Engagement between the hanging member of each second scaffolding part and the main girder with each first scaffolding part in which the hanging member is engaged with the main girder is left on one end side in the bridge axis direction of the bridge pedestal. By releasing and rotating each third scaffolding portion with respect to each first scaffolding portion, each third scaffolding portion is moved to one side and the other side of the bridge pedestal, and each second scaffolding portion is moved. By rotating each of the scaffolding portions of the bridge with respect to each third scaffolding portion, each second scaffolding portion is moved so as to wrap around the other end side in the bridge axis direction of the bridge pedestal, and the other end side in the bridge axis direction of the bridge pedestal. After engaging the hanging member of each second scaffolding portion that has moved to the main girder, the hanging member of each first scaffolding portion on one end side in the bridge axis direction is disengaged from the main girder, and each Each of the first scaffolding portions is rotated by rotating the third scaffolding portion with respect to each of the second scaffolding portions and rotating each of the first scaffolding portions with respect to each of the third scaffolding portions. A suspended scaffolding device characterized in that each third scaffolding portion is configured to move to the other end side of the bridge pedestal in the bridge axial direction.
前記各第1の足場部の長手方向他端部同士を互いに着脱可能に連結し、各第2の足場部の長手方向他端部同士を互いに着脱可能に連結した
ことを特徴とする請求項記載の吊り足場装置。
Claim 1, wherein the one another detachably connecting the other longitudinal ends of the respective first scaffold section and mutually detachably connecting the other longitudinal end portions of each of the second scaffold section The suspended scaffolding device described.
前記第1及び第2の足場部は、互いに回動自在に連結された複数の作業床を有する
ことを特徴とする請求項1または2記載の吊り足場装置。
The suspended scaffolding device according to claim 1 or 2, wherein the first and second scaffolding portions have a plurality of work floors rotatably connected to each other.
前記第1及び第2の足場部は、互いに長手方向に移動自在に連結された複数の作業床を有する
ことを特徴とする請求項1または2記載の吊り足場装置。
The suspended scaffolding device according to claim 1 or 2, wherein the first and second scaffolding portions have a plurality of work floors movably connected to each other in the longitudinal direction.
前記吊下部材は、主桁の下フランジに着脱自在に係合する係合部を有し、係合部によって主桁との係合及び係合解除を行う
ことを特徴とする請求項1、2、3または4記載の吊り足場装置。
The hanging member has an engaging portion that is detachably engaged with the lower flange of the main girder, and the engaging portion engages with and disengages the main girder. 2, 3 or 4 Suspended scaffolding device.
前記係合部は、主桁の下フランジ上を走行することにより係合部を主桁に沿って移動させる車輪を有する
ことを特徴とする請求項記載の吊り足場装置。
The suspension scaffolding device according to claim 5 , wherein the engaging portion has wheels that move the engaging portion along the main girder by traveling on the lower flange of the main girder.
前記係合部は、係合部の移動を任意に規制可能な移動規制手段を有する
ことを特徴とする請求項または記載の吊り足場装置。
The suspended scaffolding device according to claim 5 or 6 , wherein the engaging portion has a movement regulating means capable of arbitrarily restricting the movement of the engaging portion.
JP2017154678A 2017-08-09 2017-08-09 Suspended scaffolding device Active JP6876573B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017154678A JP6876573B2 (en) 2017-08-09 2017-08-09 Suspended scaffolding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017154678A JP6876573B2 (en) 2017-08-09 2017-08-09 Suspended scaffolding device

Publications (2)

Publication Number Publication Date
JP2019031876A JP2019031876A (en) 2019-02-28
JP6876573B2 true JP6876573B2 (en) 2021-05-26

Family

ID=65523288

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2017154678A Active JP6876573B2 (en) 2017-08-09 2017-08-09 Suspended scaffolding device

Country Status (1)

Country Link
JP (1) JP6876573B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110565516B (en) * 2019-08-24 2022-04-12 湖南桥康智能科技有限公司 Foldable bridge detection arm and detection car
JP7313289B2 (en) * 2020-01-07 2023-07-24 株式会社Ihiインフラシステム Suspension tool for suspended scaffold and suspended scaffold equipped with the same
JP7246035B2 (en) * 2020-12-28 2023-03-27 リバークル株式会社 mobile scaffolding
JP7444385B1 (en) 2023-12-08 2024-03-06 株式会社Ikemoto Installation structure of work scaffolding for overpass

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5992712U (en) * 1982-12-13 1984-06-23 石川島播磨重工業株式会社 Tower pillar inspection vehicle
JPS59177406A (en) * 1983-03-28 1984-10-08 日本道路公団 Inspection apparatus of suspension bridge beam
JPS60203708A (en) * 1984-03-27 1985-10-15 石川島播磨重工業株式会社 Bridge maintenance apparatus
JPH02112508A (en) * 1988-10-21 1990-04-25 Miyaji Kensetsu Kogyo Kk Moving device
JPH0765296B2 (en) * 1989-10-24 1995-07-19 株式会社宮地鐵工所 Movable scaffolding device for bridge and its assembling method
JP2007051416A (en) * 2005-08-12 2007-03-01 Gijutsu Kaihatsu Kenkyusho:Kk Scaffold device
WO2016079372A1 (en) * 2014-11-21 2016-05-26 Fast Beam Oy Scaffolding arrangement

Also Published As

Publication number Publication date
JP2019031876A (en) 2019-02-28

Similar Documents

Publication Publication Date Title
JP6876573B2 (en) Suspended scaffolding device
CN107338727B (en) Integrally-disassembled and assembled anti-collision wall template and walking type rail hanging and moving system thereof
JP6004353B2 (en) Replacement method of concrete floor slab for elevated road
JP4504910B2 (en) Dolly and method of erection of temporary pier using it
KR100987297B1 (en) Repair and inspection apparatus of bridge
JP2017020290A (en) Disassembling method of bridge
JP2016008406A (en) Temporary bearing method for main girder in floor slab replacement work with composite girder, floor slab replacement method with composite girder, and temporary bearing structure for main girder in floor slab replacement work with composite girder
JP5484983B2 (en) Method for assembling and dismantling bridge moving work device
KR100432811B1 (en) The method for checking bridge
EP3964647B1 (en) Tool for dismounting travellers for concreting large arches of viaducts
CN113026528A (en) Method for mounting mountain forest space curve steel structure plank road
JP7430071B2 (en) Mobile scaffolding, mobile scaffolding system, and installation method of mobile scaffolding system
JP3991067B1 (en) Temporary bridge between railway platforms
JP4407306B2 (en) How to assemble a suspended scaffold
JP2006265899A (en) Scaffolding construction method
JP6035204B2 (en) Mobile safety belt mounting device for bridge construction
JPH05295712A (en) Mobile protecting construction for bridge
JP4425611B2 (en) Installation method of scaffolding for bridge girder repair painting work and scaffold equipment for bridge girder repair painting work
JP4044893B2 (en) Suspended scaffolding
JP6368628B2 (en) Mobile scaffold and inspection / repair method using the mobile scaffold
JP2023000184A (en) Mobile protective device and method for dismantling construction scaffold
CN114622498A (en) Self-walking operation platform for construction of cable-stayed bridge bottom and installation method
KR200402793Y1 (en) Rail and roller Type device for hanging scaffold of bridge slab
JP2021011697A (en) Suspended load moving apparatus, removal method of existing bridge, and installing method of bridge member
JP2007186947A (en) Method of forming working scaffold on girder back face, and working scaffold on girder back face

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20200311

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20210129

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20210203

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20210326

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20210414

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20210426

R150 Certificate of patent or registration of utility model

Ref document number: 6876573

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE

Ref document number: 6876573

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250