Crane access staircase and mounting system

摘要

An access system for facilitating access to an elevated deck of a mobile crane includes a staircase having a support post defining an axis of inclination. A plurality of ascending steps is connected to the at least one support post, and a mounting bracket is pivotally coupled to an upper end of the at least one support post. The staircase is pivotable about a longitudinal axis such that a lower end of the at least one support post is induced to move in a lateral direction in response to pivotal motion of the at least one support post. A caster is coupled to the lower end of the support post for supporting the staircase on a ground surface. The caster supports the staircase on the ground surface throughout longitudinal movements of the staircase and lateral movements of the staircase induced by vertical movements of the mobile crane.

主权项

1. An access system for facilitating access to an elevated portion of a mobile crane, the access system comprising:
a mounting bracket for coupling to the elevated portion of the mobile crane; a staircase having at least one support post defining an axis of inclination and upper and lower ends, and a plurality of ascending steps connected to the at least one support post, wherein the staircase is operable to pivotally couple the upper end of the at least one support post to the mounting bracket such that the staircase is pivotable about a longitudinal axis generally orthogonal to the axis of inclination such that the lower end of the at least one support post is induced to move in a lateral direction in response to pivotal motion of the at least one support post, and wherein the staircase is operable to decouple the upper end of the at least one support post from the mounting bracket; and a caster coupled to the lower end of the at least one support post for supporting the staircase on a ground surface when the mounting bracket is coupled to the elevated portion of the mobile crane and the upper end of the at least one support post is pivotally coupled to the mounting bracket.