A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To provide a guard fence which employs, in particular, a three-leg structure, is allowed in a horizontal arrangement, can open and close a door body from any directions, can be installed at a manhole in which a sufficient space such as a road sideway is not secured, is compactly foldable, and easy in transportation, related to the guard fence which is installed at an opening part of the manhole.SOLUTION: In order to accomplish a purpose of this invention, there is provided a guard fence for manhole work having three vertical columnar supports which are erected at equal intervals on a circumference at the outside of a circular manhole opening part, and three mid-foldable single-sided opening type door bodies attached to the three vertical columnar supports, respectively, in a vertical axial direction so as to be turnable, and opening and closing an interval between the adjacent vertical columnar supports. Upper ends of the three vertical columnar supports form beam parts which are bent in a horizontal direction, and tips of the beam parts are connected to one another by a beam part connecting member which can fix the beam parts into three-pronged shapes having equal angles.SELECTED DRAWING: Figure 1
【課題】本発明は、マンホールの開口部に設置する防護柵に関するもので、特に三脚構造を採用し、水平設置が容易にでき、どの方向からも扉体の開閉が可能で、道路脇など十分なスペースが確保できないマンホールでも設置が可能なうえに、コンパクトに折りたたむことができて運搬も容易な防護柵を提供することを目的としている。【解決手段】そして本発明は上記目的を達成するために、円形のマンホール開口部より外側の円周上に等間隔で立設される３本の垂直支柱と、前記３本の垂直支柱の各々に垂直軸方向に回動可能に取り付けられ、隣接する垂直支柱の間隙を開閉する中折れ可能な片開き式の３枚の扉体を備えたマンホール作業用防護柵であって、前記３本の垂直支柱の上端は、水平方向に屈曲した梁部を形成するとともに、前記各梁部の先端は、前記梁部を等角度の三又状に固定可能な梁部連結部材によって連結するようにしたものである。【選択図】図１
To provide a guard fence which employs, in particular, a three-leg structure, is allowed in a horizontal arrangement, can open and close a door body from any directions, can be installed at a manhole in which a sufficient space such as a road sideway is not secured, is compactly foldable, and easy in transportation, related to the guard fence which is installed at an opening part of the manhole.SOLUTION: In order to accomplish a purpose of this invention, there is provided a guard fence for manhole work having three vertical columnar supports which are erected at equal intervals on a circumference at the outside of a circular manhole opening part, and three mid-foldable single-sided opening type door bodies attached to the three vertical columnar supports, respectively, in a vertical axial direction so as to be turnable, and opening and closing an interval between the adjacent vertical columnar supports. Upper ends of the three vertical columnar supports form beam parts which are bent in a horizontal direction, and tips of the beam parts are connected to one another by a beam part connecting member which can fix the beam parts into three-pronged shapes having equal angles.SELECTED DRAWING: Figure 1
【課題】本発明は、マンホールの開口部に設置する防護柵に関するもので、特に三脚構造を採用し、水平設置が容易にでき、どの方向からも扉体の開閉が可能で、道路脇など十分なスペースが確保できないマンホールでも設置が可能なうえに、コンパクトに折りたたむことができて運搬も容易な防護柵を提供することを目的としている。【解決手段】そして本発明は上記目的を達成するために、円形のマンホール開口部より外側の円周上に等間隔で立設される３本の垂直支柱と、前記３本の垂直支柱の各々に垂直軸方向に回動可能に取り付けられ、隣接する垂直支柱の間隙を開閉する中折れ可能な片開き式の３枚の扉体を備えたマンホール作業用防護柵であって、前記３本の垂直支柱の上端は、水平方向に屈曲した梁部を形成するとともに、前記各梁部の先端は、前記梁部を等角度の三又状に固定可能な梁部連結部材によって連結するようにしたものである。【選択図】図１
GUARD FENCE FOR MANHOLE WORK
マンホール作業用防護柵
MIYAKE HIDEFUMI (author)
2022-04-26
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen