Sign post

Claim 1

A sign post comprising vertically and horizontally extending hollow frame elements which are mutually connected so as to form one or more compartments for signboards, each horizontal frame element at each end thereof including a securing member, each of said securing members including a foot inserted into and secured in the end of the corresponding horizontal frame element and a crosspiece connected thereto by means of a body part having a width smaller than the width of said crosspiece so as to form recesses between said foot and the ends of said crosspiece extending laterally with respect to said body part; each vertical frame element having a number of openings in a side wall thereof and corresponding to the number of horizontal frame elements of said sign post, each of said openings having generally the same shape as the cross section of each of the crosspieces of said securing members so as to receive one of said crosspieces in each of said openings; a locking rail being movably arranged in each of said vertical frame elements, each of said locking rails being provided in one side thereof with a number of openings corresponding to the number of openings in the corresponding vertical frame element, each of said openings in said locking rail consisting of a first part having generally the same shape as the openings in the side wall of said vertical frame element, and a second opening part extending vertically from the top of said first opening part and having a width generally corresponding to the width of the body parts of said securing members and a height at least corresponding to the height of said body part, each of said locking rails, moreover, comprising wedge-shaped cam means, one provided along each side of each of said vertically extending second opening parts and with the smaller ends of said cam means pointing towards the laterally extending upper edges of said first opening parts, each of said wedge-shaped cam means having a thickness at the blunt end of each cam means which exceeds the width of said recesses in said securing members, each of said locking rails being movable in the longitudinal direction of the corresponding vertical frame element with said side of said rail, wherein said openings of said rail are provided in sliding contact with the inner surface of said wall of the corresponding vertical frame element wherein said openings of said vertical frame element are provided, each of said locking rails, moreover, being movable from a position in which said first opening parts of said openings in said locking rail register with said wall openings and to a position wherein said cam means of said locking rail engage said recesses in said securing members.