A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PROBLEM TO BE SOLVED: To provide a wrench tool which can screw-operate a polygonal holed bolt arranged below main members even in a grating lid in which an interval between the adjacent main members is narrower than an interval of diagonals of a wrench shaft part.SOLUTION: A wrench tool comprises a wrench shaft part 52 having a square-column shaped engagement angular part 55 which is detachably fit into a polygonal hole of a polygonal holed bolt 41, and an insertion rod part 56 having an outside diameter which is equal to or less than an interval between diagonals of the engagement angular part 55. The interval between the diagonals of the engagement angular part 55 is set longer than an interval between main members 31, and an interval between opposing faces of the engagement angular part 55 and an outside diameter of the penetration rod part 56 are set shorter than the interval between the main members 31. In this constitution, the engagement angular part 55 is inserted between the main members 31, protruded downwardly, and engaged with the polygonal holed blot 41, and the insertion rod part 56 is arranged between the main members 31, thus screw-operating the polygonal holed bolt 41.SELECTED DRAWING: Figure 8
【課題】隣合うメインバーの間隔がレンチ軸部の対角の間隔よりも狭いグレーチング蓋にあっても、該メインバーの下方に配した多角形穴付きボルトを螺回操作できるレンチ工具を提案する。【解決手段】多角形穴付きボルト４１の多角形穴に係脱可能に嵌入される角柱状の係合角形部５５と、該係合角形部５５の対面間の間隔以下の外径からなる挿通杆部５６とを備えたレンチ軸部５２を備え、該係合角形部５５の対角間の間隔をメインバー３１間の間隔よりも長く、かつ該係合角形部５５の対面間の間隔と挿通杆部５６の外径とを該メインバー３１間の間隔よりも短くしたものである。かかる構成によれば、係合角形部５５をメインバー３１間を挿通して下方に突出させて多角形穴付きボルト４１に係合させると共に、挿通杆部５６をメインバー３１間に配することで、該多角形穴付きボルト４１を螺回操作できる。【選択図】図８
PROBLEM TO BE SOLVED: To provide a wrench tool which can screw-operate a polygonal holed bolt arranged below main members even in a grating lid in which an interval between the adjacent main members is narrower than an interval of diagonals of a wrench shaft part.SOLUTION: A wrench tool comprises a wrench shaft part 52 having a square-column shaped engagement angular part 55 which is detachably fit into a polygonal hole of a polygonal holed bolt 41, and an insertion rod part 56 having an outside diameter which is equal to or less than an interval between diagonals of the engagement angular part 55. The interval between the diagonals of the engagement angular part 55 is set longer than an interval between main members 31, and an interval between opposing faces of the engagement angular part 55 and an outside diameter of the penetration rod part 56 are set shorter than the interval between the main members 31. In this constitution, the engagement angular part 55 is inserted between the main members 31, protruded downwardly, and engaged with the polygonal holed blot 41, and the insertion rod part 56 is arranged between the main members 31, thus screw-operating the polygonal holed bolt 41.SELECTED DRAWING: Figure 8
【課題】隣合うメインバーの間隔がレンチ軸部の対角の間隔よりも狭いグレーチング蓋にあっても、該メインバーの下方に配した多角形穴付きボルトを螺回操作できるレンチ工具を提案する。【解決手段】多角形穴付きボルト４１の多角形穴に係脱可能に嵌入される角柱状の係合角形部５５と、該係合角形部５５の対面間の間隔以下の外径からなる挿通杆部５６とを備えたレンチ軸部５２を備え、該係合角形部５５の対角間の間隔をメインバー３１間の間隔よりも長く、かつ該係合角形部５５の対面間の間隔と挿通杆部５６の外径とを該メインバー３１間の間隔よりも短くしたものである。かかる構成によれば、係合角形部５５をメインバー３１間を挿通して下方に突出させて多角形穴付きボルト４１に係合させると共に、挿通杆部５６をメインバー３１間に配することで、該多角形穴付きボルト４１を螺回操作できる。【選択図】図８
WRENCH TOOL
レンチ工具
KONDO KENJI (author)
2018-02-22
Patent
Electronic Resource
Japanese
| British Library Conference Proceedings | 1995
Wiley | 1954