A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A horizontal extendable ladder is revealed. The horizontally extendable ladder includes at least three rails and a plurality of rungs disposed between the two adjacent rails. The three rails are set vertically while the rungs are equally spaced and arranged horizontally between the two adjacent rails from top to bottom to form at least two ladder frames. Each of two ends of the rung is arranged with a first pivot shaft that is pivotally connected to the rail. Thereby the rungs can be rotated synchronously between the two adjacent rails for horizontal retraction or extension of the ladder. The ladder is used more efficiently.
A horizontal extendable ladder is revealed. The horizontally extendable ladder includes at least three rails and a plurality of rungs disposed between the two adjacent rails. The three rails are set vertically while the rungs are equally spaced and arranged horizontally between the two adjacent rails from top to bottom to form at least two ladder frames. Each of two ends of the rung is arranged with a first pivot shaft that is pivotally connected to the rail. Thereby the rungs can be rotated synchronously between the two adjacent rails for horizontal retraction or extension of the ladder. The ladder is used more efficiently.
HORIZONTALLY EXTENDABLE LADDER
HORIZONTAL AUSZIEHBARE LEITER
ÉCHELLE EXTENSIBLE HORIZONTALEMENT
SUN SHOU-I (author)
2019-11-20
Patent
Electronic Resource
English
IPC:
E06C
LADDERS
,
Leitern