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PROBLEM TO BE SOLVED: To provide a boring device and a cutting blade, which can cut a larger hole than an opening of a manhole.SOLUTION: A boring device bores a hole by cutting a wall surface of a concrete structure having an opening from inner side into a toric shape. The boring device comprises a ring-shaped cutting blade 240 and a rotation drive part that drives the rotation of the cutting blade 240. The cutting blade 240 is formed by connecting multiple arc part cutting blades 241 so as to mutually freely rotate, or through a rotatable link member 242a.SELECTED DRAWING: Figure 3
【課題】マンホール等の開口よりも大きな孔を切削することが可能な穿孔装置および切削刃を提供する。【解決手段】開口を有するコンクリート構造物の壁面を内部側から円環状に切削して穿孔する穿孔装置は、リング状の切削刃２４０と、上記切削刃２４０を回転駆動させる回転駆動部とを備え、上記切削刃２４０は、複数の円弧状の部分切削刃２４１が、互いに回動自在に連結され、または回動自在のリンク部材２４２ａを介して連結されている。【選択図】図３
PROBLEM TO BE SOLVED: To provide a boring device and a cutting blade, which can cut a larger hole than an opening of a manhole.SOLUTION: A boring device bores a hole by cutting a wall surface of a concrete structure having an opening from inner side into a toric shape. The boring device comprises a ring-shaped cutting blade 240 and a rotation drive part that drives the rotation of the cutting blade 240. The cutting blade 240 is formed by connecting multiple arc part cutting blades 241 so as to mutually freely rotate, or through a rotatable link member 242a.SELECTED DRAWING: Figure 3
【課題】マンホール等の開口よりも大きな孔を切削することが可能な穿孔装置および切削刃を提供する。【解決手段】開口を有するコンクリート構造物の壁面を内部側から円環状に切削して穿孔する穿孔装置は、リング状の切削刃２４０と、上記切削刃２４０を回転駆動させる回転駆動部とを備え、上記切削刃２４０は、複数の円弧状の部分切削刃２４１が、互いに回動自在に連結され、または回動自在のリンク部材２４２ａを介して連結されている。【選択図】図３
BORING DEVICE AND CUTTING BLADE
穿孔装置、および切削刃
INAGAKI HIROHISA (author)
2017-02-09
Patent
Electronic Resource
Japanese
BORING MACHINE COMPRISING A VARIABLE-GEOMETRY CUTTING DEVICE
| European Patent Office | 2024