Casing with assisted opening for protecting an apparatus in the form of a post

An opening casing for protecting an apparatus in the form of a post (10) whose head comprises parts to be protected, characterized in that the casing comprises:

• a fixed part (1) fixedly mounted to the post (10) below the zone to be protected, this fixed part comprising, on one side of the post (10), a support structure (14);
• a mobile cover-forming part (15), for covering in the closed position the upper part of the post (10) while ensuring preferably a continuity of shape and/or of sealing with the fixed part (10);
• a mechanical connection between the support structure (14) and the mobile part (15), including
• a first pair of vertically aligned upper and lower pins (20,20') connected to the fixed part and spaced apart a pre-set distance,
• a second pair of vertically aligned upper and lower pins (21,21') connected to the cover-forming part and spaced apart said pre-set distance,
• an upper connecting link (18) connected to the upper pins (21,21) of the first and second pairs of pins, and
• a lower connecting link (18) connected to the lower pins of the first and second pairs of pins;
• and
• an assistance device mounted between the fixed part and the mobile part to help move the mobile part upward;
• whereby the upper and lower links (18,18') connect the cover-forming part to the fixed part for upward and downward movement between open and closed positions and wherein the casing does not extend over more ground area than when the mobile part is in the open position than when the mobile part is in the closed position.