Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A working ladder has a pair of ladder frames and a supporting shaft. The pair of ladder frames are pivotally connected to each other, and each one of the pair of ladder frames has a first side rail, a second side rail, a foot stem and multiple rungs. The first side rail is pivotally connected to the other first side rail. The second side rail is pivotally connected to the other second side rail and is parallel with the first side rail of the ladder frame. The foot stem is adjustably connected to the second side rail and has a connecting end, an abutting end and a fixing segment. The rungs are securely and transversally connected to the first side rail and the second side rail at intervals. The supporting shaft is connected to the pair of ladder frames and has a jointing end and a locating end.
A working ladder has a pair of ladder frames and a supporting shaft. The pair of ladder frames are pivotally connected to each other, and each one of the pair of ladder frames has a first side rail, a second side rail, a foot stem and multiple rungs. The first side rail is pivotally connected to the other first side rail. The second side rail is pivotally connected to the other second side rail and is parallel with the first side rail of the ladder frame. The foot stem is adjustably connected to the second side rail and has a connecting end, an abutting end and a fixing segment. The rungs are securely and transversally connected to the first side rail and the second side rail at intervals. The supporting shaft is connected to the pair of ladder frames and has a jointing end and a locating end.
WORKING LADDER
CHANG SHIH-CHIEH (Autor:in)
23.06.2016
Patent
Elektronische Ressource
Englisch
IPC:
E06C
LADDERS
,
Leitern