OUTDOOR BILLBOARD Russian patent published in 2017 - IPC G09F15/00 

FIELD: human vital needs satisfaction.

SUBSTANCE: invention relates to stationary outdoor advertisings located at a certain distance from the Earth's surface, having a rectangular configuration and representing a one-piece flat board located vertically, set along the road networks or in the streets of the localities or in any other place. Practically all outdoor billboards represent a one-piece flat board of rectangular or another configuration, installed vertically at a fairly high altitude above the Earth's surface and standing under constant wind load. When wind pressure, especially during gusts, affects the board, it shakes the board, the rack and the foundation on which the rack is mounted, thereby destroying and reducing the lifespan and reliability of the whole billboard. In addition, a defective billboard creates an immediate threat to people's lives and health and their property when it falls or collapses. The proposed invention allows to reduce the harmful effect of wind load on the outdoor billboard by making changes to its classical design. Substance of the invention consists as follows. Instead of a one-piece flat board, a flat board is used, consisting of several separate movable vertical sections, each section is mounted on an axis with the possibility of rotation relative to the vertical plane. In the absence of a wind load or its admissible values, the sections of the board under the action of their own mass and mass of the counterweight are placed in the vertical position, forming a single two-sided advertising surface. When exceeding the wind load value permissible for this billboard, each individual section of the advertising board is rotated around its axis, deviating from the vertical plane forward or backward, depending on the direction of the wind load, forming slits through which air flows are passed, reducing the wind load. Also, when placing the billboard, it is recommended to take into account the wind rose, which will additionally reduce the wind load. The number of sections depends on the area of the billboard and the nature of the wind load in this area. The value of the section inclination angle from the vertical plane is regulated by changing the mass of the counterweight or changing the position relative to the axis of the section rotation.

EFFECT: increasing reliability and increasing service life of the outdoor billboard, reducing consumption of materials for manufacture, placement and maintenance, while reducing the level of danger to the health and life of people and their property due to reduction in the wind load acting on its board.

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