BRIDGE GIRDER INSPECTION DEVICE

To provide a bridge girder inspection device which can perform inspection by an X-ray source and a detector facing each other on a lateral wall of a box girder that supports the load of a bridge.SOLUTION: A bridge girder inspection device for inspecting the strength of a hollow box girder whose lateral and bottom surfaces are closed among the girders that support the load of a bridge, the bridge girder inspection device having a detector that is adjustably arranged on the outer surface of the box girder by an arm extending downward from an inspection vehicle on the bridge, an X-ray source that is carried in from a gateway intermittently provided on the lower surface of the box girder so as to be arranged on the inner surface of the box girder to irradiate the detector with X-rays, and a rangefinder that measures the internal position to the X-ray source and the external position to the detector with respect to the gateway. The bridge girder inspection device is provided with means for adjusting the position of the detector so as to face the X-ray source across the side surface of the box girder with reference to the internal position and the external position.SELECTED DRAWING: Figure 1 【課題】橋梁の荷重を支持する箱桁の側壁にＸ線源と検出器を対向させて検査可能な橋梁桁点検装置を提供する。【解決手段】橋梁の荷重を支持する桁のうち側面及び下面が閉塞された中空の箱桁の強度を検査するための橋梁桁点検装置であって、前記橋梁上の点検車から下方に延ばしたアームによって前記箱桁の外側面に位置調整可能に配置される検出器と、前記箱桁の下面に間欠的に設けられた出入口から搬入されて前記検出器にＸ線を照射するために前記箱桁の内側面に配置されたＸ線源と、前記出入口を基準として前記Ｘ線源までの内部位置および前記検出器までの外部位置を計測する距離計と、を有し、前記内部位置と前記外部位置を基に前記箱桁の側面を挟んで前記Ｘ線源と対向するように前記検出器の位置を調整する手段を備える、ことを特徴とする。【選択図】図１