A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
FOLDABLE STEP STOOL
PROBLEM TO BE SOLVED: To provide a rigid foldable step stool whose hinge portions will not be disassembled even if a person having a heavy item steps on the step stool.SOLUTION: In a step tool that is configured to be foldable in such manner that: a top plate 40 that is mounted on two side plates 20 and two side plates 30; the lateral plates 30 and the top plate 40 are divided at their central portions; and hinge portions are formed along corners between two adjacent plates and along each central fold line of the divided plates. Central vertical hinge portions 35 of each lateral plates 30 are separated by a centrally formed opening portion 90 into an upper one and a lower one. Each central vertical hinge portion 35 is made up of a shaft portion, with no shaft hole, facing the opening portion, and other plural shaft portions having coaxial shaft holes 56. A metal-made semi-screw drill screw 58 having a cylindrical portion 58c whose length is equal to the sum of shaft hole lengths of the consecutive shaft portions and having a head portion 58a with a flat pressing surface is fixed in a thread manner to the shaft portion facing the opening 90 by insertion into the shaft hole, and inserted into the shaft hole so that a swing movement of the semi-screw drill screw 58 is made possible relative to the shaft bore 56 in a close contact manner.SELECTED DRAWING: Figure 1
【課題】重量物を持って載っても、ヒンジが分解することのない強固な折り畳み式踏台を提供する。【解決手段】２枚の側板２０と２枚の横板３０の上に天板４０が載置されると共に横板３０と天板４０とが中央で分割され、その繋ぎ目の角部及び分割された中央の折り目に沿ってヒンジが形成され、該ヒンジによって折り畳み自在に形成された踏台において、両横板３０の中央縦ヒンジ３５は、中央に設けた開口部９０により上下両側に分離され、該中央縦ヒンジ３５は、開口部に臨んだ軸孔を有さない軸部とそれ以外の軸芯に沿った軸孔５６を有する複数の軸部とで形成され、軸部の連続した軸孔の長さと等しい長さの円筒部５８ｃを有し且つ押圧面が平面状の頭部５８ａを有する金属製の半スクリュードリルネジ５８を、軸孔に差し込んで開口部９０に臨んだ軸部にねじ込み固定し、半スクリュードリルネジ５８と軸孔５６とを密接状態に擺動可能とする。【選択図】図１
FOLDABLE STEP STOOL
PROBLEM TO BE SOLVED: To provide a rigid foldable step stool whose hinge portions will not be disassembled even if a person having a heavy item steps on the step stool.SOLUTION: In a step tool that is configured to be foldable in such manner that: a top plate 40 that is mounted on two side plates 20 and two side plates 30; the lateral plates 30 and the top plate 40 are divided at their central portions; and hinge portions are formed along corners between two adjacent plates and along each central fold line of the divided plates. Central vertical hinge portions 35 of each lateral plates 30 are separated by a centrally formed opening portion 90 into an upper one and a lower one. Each central vertical hinge portion 35 is made up of a shaft portion, with no shaft hole, facing the opening portion, and other plural shaft portions having coaxial shaft holes 56. A metal-made semi-screw drill screw 58 having a cylindrical portion 58c whose length is equal to the sum of shaft hole lengths of the consecutive shaft portions and having a head portion 58a with a flat pressing surface is fixed in a thread manner to the shaft portion facing the opening 90 by insertion into the shaft hole, and inserted into the shaft hole so that a swing movement of the semi-screw drill screw 58 is made possible relative to the shaft bore 56 in a close contact manner.SELECTED DRAWING: Figure 1
【課題】重量物を持って載っても、ヒンジが分解することのない強固な折り畳み式踏台を提供する。【解決手段】２枚の側板２０と２枚の横板３０の上に天板４０が載置されると共に横板３０と天板４０とが中央で分割され、その繋ぎ目の角部及び分割された中央の折り目に沿ってヒンジが形成され、該ヒンジによって折り畳み自在に形成された踏台において、両横板３０の中央縦ヒンジ３５は、中央に設けた開口部９０により上下両側に分離され、該中央縦ヒンジ３５は、開口部に臨んだ軸孔を有さない軸部とそれ以外の軸芯に沿った軸孔５６を有する複数の軸部とで形成され、軸部の連続した軸孔の長さと等しい長さの円筒部５８ｃを有し且つ押圧面が平面状の頭部５８ａを有する金属製の半スクリュードリルネジ５８を、軸孔に差し込んで開口部９０に臨んだ軸部にねじ込み固定し、半スクリュードリルネジ５８と軸孔５６とを密接状態に擺動可能とする。【選択図】図１
FOLDABLE STEP STOOL
折り畳み式踏台
TACHIKAWA AMAMITSU (author) / FUJIHIRA HIDEAKI (author) / CUI HUI HU (author)
2018-08-02
Patent
Electronic Resource
Japanese