Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
TRIPLE EXPANSION LADDER
PROBLEM TO BE SOLVED: To provide a triple expansion ladder constituted so as to respectively, individually, and extensively operate a ladder of a middle stage and an upper stage by two operation ropes, in a triple ladder composed of respective ladders of a lower stage, the middle stage, and the upper stage, in the present invention.SOLUTION: A three-stage expansion ladder is composed of a combination of a lower stage ladder, a middle stage ladder, and an upper stage ladder respectively constituted of a pair of left-right cross-sectional substantially U-shaped ladder columns and a stepping sash bar installed between these, and constituted so that the middle stage ladder and the upper stage ladder can be expanded with respect to the lower stage ladder by respectively slidably constituting a ladder column of a ladder of the respective stages. In a triple expansion ladder, two operation ropes for respectively executing expansion operation of the middle stage ladder and the upper stage ladder are constituted as a separate body, a middle stage operation rope for lifting the middle stage ladder is extended over the lower stage ladder and the middle stage ladder by fixing its both ends to a predetermined position of the lower stage ladder, and an upper stage operation rope for lifting the upper stage ladder is extended over the lower stage ladder, the middle stage ladder, and the upper stage ladder by fixing its both ends to a predetermined position of the upper stage ladder.
【課題】この発明は、下段、中段、上段の各梯子からなる三連の梯子において、中段と上段の梯子を二本の操作ロープでそれぞれ個別に伸長操作するように構成した三連伸縮梯子に関する。【解決手段】断面略コ字状の左右一対の梯子支柱とその間に架設した踏桟とよりそれぞれ構成した下段梯子と中段梯子と上段梯子の組合せよりなり、しかも、各段の梯子の梯子支柱は、それぞれスライド自在に構成することにより、中段梯子と上段梯子は下段梯子に対して伸縮可能に構成した三段伸縮梯子において、中段梯子と上段梯子の伸縮操作をそれぞれ行う二本の操作ロープを別体に構成し、しかも、中段梯子昇降用の中段操作ロープは、その両端を下段梯子の所定位置に固定することにより、下段梯子と中段梯子とに跨って掛け渡すと共に、上段梯子昇降用の上段操作ロープは、その両端を上段梯子の所定位置に固定することにより、下段梯子と中段梯子と上段梯子とに跨って掛け渡したことを特徴とする三連伸縮梯子。【選択図】図１
TRIPLE EXPANSION LADDER
PROBLEM TO BE SOLVED: To provide a triple expansion ladder constituted so as to respectively, individually, and extensively operate a ladder of a middle stage and an upper stage by two operation ropes, in a triple ladder composed of respective ladders of a lower stage, the middle stage, and the upper stage, in the present invention.SOLUTION: A three-stage expansion ladder is composed of a combination of a lower stage ladder, a middle stage ladder, and an upper stage ladder respectively constituted of a pair of left-right cross-sectional substantially U-shaped ladder columns and a stepping sash bar installed between these, and constituted so that the middle stage ladder and the upper stage ladder can be expanded with respect to the lower stage ladder by respectively slidably constituting a ladder column of a ladder of the respective stages. In a triple expansion ladder, two operation ropes for respectively executing expansion operation of the middle stage ladder and the upper stage ladder are constituted as a separate body, a middle stage operation rope for lifting the middle stage ladder is extended over the lower stage ladder and the middle stage ladder by fixing its both ends to a predetermined position of the lower stage ladder, and an upper stage operation rope for lifting the upper stage ladder is extended over the lower stage ladder, the middle stage ladder, and the upper stage ladder by fixing its both ends to a predetermined position of the upper stage ladder.
【課題】この発明は、下段、中段、上段の各梯子からなる三連の梯子において、中段と上段の梯子を二本の操作ロープでそれぞれ個別に伸長操作するように構成した三連伸縮梯子に関する。【解決手段】断面略コ字状の左右一対の梯子支柱とその間に架設した踏桟とよりそれぞれ構成した下段梯子と中段梯子と上段梯子の組合せよりなり、しかも、各段の梯子の梯子支柱は、それぞれスライド自在に構成することにより、中段梯子と上段梯子は下段梯子に対して伸縮可能に構成した三段伸縮梯子において、中段梯子と上段梯子の伸縮操作をそれぞれ行う二本の操作ロープを別体に構成し、しかも、中段梯子昇降用の中段操作ロープは、その両端を下段梯子の所定位置に固定することにより、下段梯子と中段梯子とに跨って掛け渡すと共に、上段梯子昇降用の上段操作ロープは、その両端を上段梯子の所定位置に固定することにより、下段梯子と中段梯子と上段梯子とに跨って掛け渡したことを特徴とする三連伸縮梯子。【選択図】図１
TRIPLE EXPANSION LADDER
三連伸縮梯子
NAKAO KIMIYO (Autor:in) / NAKAO MOTOHIRO (Autor:in)
17.12.2015
Patent
Elektronische Ressource
Japanisch
IPC:
E06C
LADDERS
,
Leitern
| Europäisches Patentamt | 2016
EXPANSION AND CONTRACTION STRUCTURE OF AERIAL LADDER DEVICE
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Triple expansion experimental steam engine
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