Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
To provide a step ladder that is simple in configuration, capable of providing a stable standing work even on a rough terrain, and is lightweight.SOLUTION: A step ladder includes: a ladder-like leg body having a pair of support columns between which step rails are bridged and a top plate at its upper end portion; two rear rod-shaped supporting legs; and a pivot connection portion provided at a tip end portion of the top plate of the ladder-like leg body and causing the rod-shaped supporting legs to provide a pivotal connection to a horizontal shaft arranged in parallel to the step rails, the pivot connection portion including a tubular portion provided at an upper end portion of the rod-shaped supporting legs and having a bore that is loosely fitted on the horizontal shaft. The bore portion of the pivot connection portion is configured such that its inner radius is set to be larger than the outer radius of the horizontal shaft for allowing the two rear rod-shaped supporting legs to make it possible to open/close in a frontward/rearward direction relative to the ladder-like leg body and to make it possible to open in a right/left direction. More specifically, the two rear rod-shaped supporting legs are respectively allowed to make it possible to open/close in the frontward/rearward direction relative to the ladder-like leg body and to make it possible to open within a maximum angle between 5° or more and 45° or less in the right/left direction.SELECTED DRAWING: Figure 1
【課題】簡単な構成で、不整地であっても安定して起立して作業可能で、軽量な脚立を提供する。【解決手段】一対の支柱間に踏桟が架設され、上端部に天板を有する前側の梯子状脚体と、後側の２本の棒状支持脚体と、梯子状脚体の天板の先端部に設けられ、踏桟に対して平行に配置された水平支軸に対して、棒状支持脚体を枢結する枢結部と、を有する脚立であって、枢結部は、棒状支持脚体の上端部に設けられ、水平支軸に対して遊嵌される孔部を備えた筒状部を有する。枢結部の孔部は、梯子状脚体に対して２本の棒状支持脚体がそれぞれ前後方向に開閉自在に、且つ、左右方向に開脚自在に、孔部の内径が水平支軸の外径よりも大きく形成されている。詳細には、梯子状脚体に対して２本の棒状支持脚体がそれぞれ前後方向に開閉自在に、且つ、左右方向に最大角度が５°以上４５°以下の範囲内の角度に開脚自在に設けられている。【選択図】図１
To provide a step ladder that is simple in configuration, capable of providing a stable standing work even on a rough terrain, and is lightweight.SOLUTION: A step ladder includes: a ladder-like leg body having a pair of support columns between which step rails are bridged and a top plate at its upper end portion; two rear rod-shaped supporting legs; and a pivot connection portion provided at a tip end portion of the top plate of the ladder-like leg body and causing the rod-shaped supporting legs to provide a pivotal connection to a horizontal shaft arranged in parallel to the step rails, the pivot connection portion including a tubular portion provided at an upper end portion of the rod-shaped supporting legs and having a bore that is loosely fitted on the horizontal shaft. The bore portion of the pivot connection portion is configured such that its inner radius is set to be larger than the outer radius of the horizontal shaft for allowing the two rear rod-shaped supporting legs to make it possible to open/close in a frontward/rearward direction relative to the ladder-like leg body and to make it possible to open in a right/left direction. More specifically, the two rear rod-shaped supporting legs are respectively allowed to make it possible to open/close in the frontward/rearward direction relative to the ladder-like leg body and to make it possible to open within a maximum angle between 5° or more and 45° or less in the right/left direction.SELECTED DRAWING: Figure 1
【課題】簡単な構成で、不整地であっても安定して起立して作業可能で、軽量な脚立を提供する。【解決手段】一対の支柱間に踏桟が架設され、上端部に天板を有する前側の梯子状脚体と、後側の２本の棒状支持脚体と、梯子状脚体の天板の先端部に設けられ、踏桟に対して平行に配置された水平支軸に対して、棒状支持脚体を枢結する枢結部と、を有する脚立であって、枢結部は、棒状支持脚体の上端部に設けられ、水平支軸に対して遊嵌される孔部を備えた筒状部を有する。枢結部の孔部は、梯子状脚体に対して２本の棒状支持脚体がそれぞれ前後方向に開閉自在に、且つ、左右方向に開脚自在に、孔部の内径が水平支軸の外径よりも大きく形成されている。詳細には、梯子状脚体に対して２本の棒状支持脚体がそれぞれ前後方向に開閉自在に、且つ、左右方向に最大角度が５°以上４５°以下の範囲内の角度に開脚自在に設けられている。【選択図】図１
STEP LADDER
脚立
MORI ISAMU (Autor:in)
17.01.2019
Patent
Elektronische Ressource
Japanisch
IPC:
E06C
LADDERS
,
Leitern