| 摘要 |
<p>The traffic pole 100 comprises a trunk 102 having a cross-arm 108, and a manually operated height adjustment mechanism 114,116. The trunk is pivotable about a pivot axis 120 such that the cross-arm is movable between an operational position in which the cross-arm projects over a roadway 104, to a maintenance position wherein the cross-arm projects alongside the roadway. The height adjustment mechanism is arranged to permit translational movement of the cross-arm relative to the trunk along the pivot axis. The height adjustment mechanism may include a lock to place the height adjustment mechanism in an inactive state when in the operational position, thereby prohibiting adjustment of the cross-arm height. The height adjustment mechanism may be locked in the inactive state when the cross-arm is pivoting about the pivot axis. When the height adjustment mechanism is in the unlocked configuration, the cross-arm may be prevented from pivoting about the pivot axis.</p> |
