Collapsible staircase, notably for a vehicle such as an aircraft

摘要

A collapsible staircase is provided with a set of flat parts, with each of the parts intended to function as steps. Each flat part can be moved between a first position and a second position. All of the flat parts are substantially coplanar when the parts are in the first position, and the parts are disposed above each other and at a distance from each other when the parts are in the second position. A retractable holding handle is also provided and driven together with the flat parts.

主权项

1. A collapsible staircase, comprising:
a set of flat parts, each of the flat parts configured to function as a step; two vertical beams, vertical in use, wherein the flat parts are mounted between the two vertical beams; and at least one holding handle to assist a user in climbing the collapsible staircase, wherein the at least one handle is movable in a direction perpendicular to a major vertical longitudinal axis of at least one of the two vertical beams between a retracted position inside a wall and a service position in which the at least one holding handle is accessible to the user, wherein each of the flat parts is pivotable between a first collapsed position and a second non-collapsed position, each of the flat parts has a major plane substantially coplanar with each other when in the first position, the major planes of each of the flat parts are disposed parallel to and at a distance from each other when in the second position, the flat parts include a major axis and a minor axis, the flat parts are configured to pivot about an axis which is parallel to the major axis, the two vertical beams are fixed in a same position when the flat parts are in the first and the second positions, each of the flat parts are configured to move from the first position to the second position with a combination of a translation and a rotation, the at least one holding handle is pivotable between the service position and the retracted position, a toothed wheel is configured to be driven by the at least one holding handle, and a connecting rod connecting the flat parts to each other is configured to be driven by the toothed wheel in rotation during a movement of the flat parts between the first and second positions.