Fire escape – ladder – or scaffold – Ladder with pivoted prop
Patent
1999-01-29
1999-11-30
Chin-Shue, Alvin
Fire escape, ladder, or scaffold
Ladder with pivoted prop
182161, E06C 138
Patent
active
059925671
ABSTRACT:
A foldable frame includes a pair of upright supporting rods, a pair of prop members, upper and lower crosspieces, right and left linking arms, and a pair of guiding members. The supporting rods are parallel to each other and extend in a first longitudinal direction. The prop members are also parallel to each other but extend in a second longitudinal direction. Each prop member has a second upper connecting portion pivotally connected to a first upper connecting portion of a respective supporting rod to enable the supporting rods to move from a folded position to a straddling position. The crosspieces are disposed transverse to the supporting rods, and are pivotally mounted thereon. The linking arms have upper and lower end portions respectively pivoted to rear sides of the upper and lower crosspieces, and are spaced apart from each other in a transverse direction, and are parallel to the supporting rods. The guiding members are mounted on inboard surfaces of the prop members, and are slidably coupled with the linking arms. The guiding members are guide movement of the linking arms relative thereto so as to bring the upper crosspiece to be seated on the guiding members when the prop members are in the straddling position.
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