Blocking bollard comprising a warning device, and method for actuating a blocking bollard

A barrier bollard comprising:

• a drive;
• a main body which is connectable to the ground, the main body comprising a surface;
• a barrier body comprising an upper side and a lateral surface, the barrier body being arranged on the main body to be movable via the drive over a barrier height in a movement direction between an open position and a barrier position;
• a warning device;
• and
• a light source which is arranged on the lateral surface of the barrier body over a warning height in a warning region which is associated with the upper side of the barrier body, the light source being configured, in an activated state, to emit an optical warning signal which is oriented substantially orthogonal to the movement axis,
• wherein,
• in the open position, the upper side of the barrier body is substantially flush with the surface of the main body which finishes substantially with the ground,
• in the barrier position, the upper side of the barrier body is moved out from the ground so as to project in the barrier height over the main body, the lateral surface of the barrier body being substantially parallel with the movement direction, and
• the barrier body is movable in the movement direction via the drive for a warning sequence in a warning position where the barrier body is partially moved out from the main body relative to the open position and is at least temporarily stationary for a warning time, the warning position being formed so that substantially only the warning region is visible above the main body in the warning position for the warning time over the warning height, and the emission of the optical warning signal oriented substantially orthogonal to the movement axis is provided via a projection of the light source over the main body.