Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Slow descending structure of extension ladder
The invention relates to a slow descending structure of an extension ladder. The slow descending structure comprises multiple levels of ladder sections, wherein each level of ladder section comprises a ladder frame pipe and a treading part; the ladder frame pipe of the previous level of ladder section is called a previous level of ladder frame pipe for short; the ladder frame pipe of the next level of ladder section is called a next level of ladder frame pipe for short; the ladder frame pipe of the last level of ladder section is called a last level of ladder frame pipe for short; the outer diameter of the previous level of ladder frame pipe is smaller than the inner diameter of the next level of ladder frame pipe; the outer diameter of the next level of ladder frame pipe is smaller than the inner diameter of the last level of ladder frame pipe; and the previous level of ladder frame pipe is movably arranged in the next level of ladder frame pipe, so that external air or air of the previous level of ladder frame pipe is quickly and largely discharged into an inner cavity of the next level of ladder frame pipe, the gas pressure of the next level of ladder frame pipe is gradually increased, the negative pressure influence is eliminated, and the previous level of ladder frame pipe is prevented from being attracted by negative pressure to slide down, and as a result, the resistance is reduced, the upward sliding speed of the previous level of ladder frame pipe is higher, and the extension ladder is quickly unfolded.
本发明涉及一种伸缩梯的缓降结构，包括多级梯段，每一级梯段均包括梯框管和踩踏部，前一级梯段的梯框管简称：前一级梯框管，后一级梯段的梯框管简称：后一级梯框管，最后一级梯段的梯框管简称：最后一级梯框管，所述前一级梯框管的外径小于后一级梯框管的内径，后一级梯框管的外径小于最后一级梯框管的内径；前一级梯框管以活动方式设置在后一级梯框管内，导致外界空气或前一级梯框管的空气快速、大量排入后一级梯框管的内腔，令后一级梯框管气体压力逐渐增加，消除负压影响，避免负压吸引前一级梯框管下滑，从而减少阻力令前一级梯框管上滑速度更快，实现伸缩梯展开快速。
Slow descending structure of extension ladder
The invention relates to a slow descending structure of an extension ladder. The slow descending structure comprises multiple levels of ladder sections, wherein each level of ladder section comprises a ladder frame pipe and a treading part; the ladder frame pipe of the previous level of ladder section is called a previous level of ladder frame pipe for short; the ladder frame pipe of the next level of ladder section is called a next level of ladder frame pipe for short; the ladder frame pipe of the last level of ladder section is called a last level of ladder frame pipe for short; the outer diameter of the previous level of ladder frame pipe is smaller than the inner diameter of the next level of ladder frame pipe; the outer diameter of the next level of ladder frame pipe is smaller than the inner diameter of the last level of ladder frame pipe; and the previous level of ladder frame pipe is movably arranged in the next level of ladder frame pipe, so that external air or air of the previous level of ladder frame pipe is quickly and largely discharged into an inner cavity of the next level of ladder frame pipe, the gas pressure of the next level of ladder frame pipe is gradually increased, the negative pressure influence is eliminated, and the previous level of ladder frame pipe is prevented from being attracted by negative pressure to slide down, and as a result, the resistance is reduced, the upward sliding speed of the previous level of ladder frame pipe is higher, and the extension ladder is quickly unfolded.
本发明涉及一种伸缩梯的缓降结构，包括多级梯段，每一级梯段均包括梯框管和踩踏部，前一级梯段的梯框管简称：前一级梯框管，后一级梯段的梯框管简称：后一级梯框管，最后一级梯段的梯框管简称：最后一级梯框管，所述前一级梯框管的外径小于后一级梯框管的内径，后一级梯框管的外径小于最后一级梯框管的内径；前一级梯框管以活动方式设置在后一级梯框管内，导致外界空气或前一级梯框管的空气快速、大量排入后一级梯框管的内腔，令后一级梯框管气体压力逐渐增加，消除负压影响，避免负压吸引前一级梯框管下滑，从而减少阻力令前一级梯框管上滑速度更快，实现伸缩梯展开快速。
Slow descending structure of extension ladder
伸缩梯的缓降结构
YANG YI (Autor:in) / HE MINGLI (Autor:in) / HUO ZHIFENG (Autor:in)
03.09.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
E06C
LADDERS
,
Leitern
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