Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention concerns a foldable ladder (8) comprising a first pair (11) of opposite stiles with a first stile (1a) and a second stile (1b), and a second pair (12) of opposite stiles with a third stile (1c) and a fourth stile (1d); a series of steps (2) with their first ends (2a) articulated to said first and said third stile (1a, 1c), and with their second ends (2b) articulated to said second and said fourth stile (1b, 1d). The steps (2) are pivotable into grooves of the opposite stiles whilst they are moved towards each other for inoperative position. The steps (2) are turnable out of the grooves of the opposite stiles whilst they are moved away from each other for operative position. Said foldable ladder further comprises hinges (5, 6) between the upper ends (7a, 7b) of said first pair (11) and the lower ends (7c, 7d) of said second pair (12). The opposite stiles of the first pair and the opposite stiles of the second pair are pivotable to lengthen each other for attaining a final operative position (P1), in which said opposite stiles are moved to a maximum distance (W2). The first pair of opposite stiles are pivotable around a common axis in respect to said second pair of opposite stiles when said opposite stiles has said minimum distance, so as to position said stiles side by side for attaining a final inoperative position.
The invention concerns a foldable ladder (8) comprising a first pair (11) of opposite stiles with a first stile (1a) and a second stile (1b), and a second pair (12) of opposite stiles with a third stile (1c) and a fourth stile (1d); a series of steps (2) with their first ends (2a) articulated to said first and said third stile (1a, 1c), and with their second ends (2b) articulated to said second and said fourth stile (1b, 1d). The steps (2) are pivotable into grooves of the opposite stiles whilst they are moved towards each other for inoperative position. The steps (2) are turnable out of the grooves of the opposite stiles whilst they are moved away from each other for operative position. Said foldable ladder further comprises hinges (5, 6) between the upper ends (7a, 7b) of said first pair (11) and the lower ends (7c, 7d) of said second pair (12). The opposite stiles of the first pair and the opposite stiles of the second pair are pivotable to lengthen each other for attaining a final operative position (P1), in which said opposite stiles are moved to a maximum distance (W2). The first pair of opposite stiles are pivotable around a common axis in respect to said second pair of opposite stiles when said opposite stiles has said minimum distance, so as to position said stiles side by side for attaining a final inoperative position.
Foldable ladder
Klappleiter
Échelle pliable
TOIVONEN KARI (Autor:in)
03.06.2015
Patent
Elektronische Ressource
Englisch
IPC:
E06C
LADDERS
,
Leitern