Road Traffic-Control Signboard Assembly Having Automatic Return Function

[0007]To solve the above problems, it is an object of the present invention to provide a road traffic-control signboard assembly having a generally advanced automatic return function using structure of an existing road traffic-control signboard stay bar 1 as it is, which is preeminently improved in view of the function, economy, assembly, maintenance, weight, etc., in comparison with those of the conventional art. To accomplish the above object of the present invention, according to an aspect of the present invention, there is provided a road traffic-control signboard assembly comprising: a tubular elastic body having an insertion groove so as to be inserted into a road traffic-control signboard stay bar which is connected with a vertical support at right angle and a hole into which a rotation preventing screw can be inserted at right angle; a semicircular upper clamp which is assembled to enclose the tubular elastic body at the upper portion of the tubular elastic body, including a ti