COLLISION DETECTION DEVICE FOR VEHICLE

PROBLEM TO BE SOLVED: To provide a collision detection device which enables a collision detection range detected by a flexible tube sensor to be set wide beyond the end of a bumper beam with a simple structure.SOLUTION: A flexible tube of a flexible tube sensor 21 is held by a bumper beam 13 and an impact absorption member 15a. A bumper beam extension member 22 and an EA extension member 23 are continuously arranged at the ends of the bumper beam 13 and impact absorption member 15a respectively, extended close to a bumper side part. The EA extension member 23 is divided into an upper extension part 24 and a lower extension part 25, and the opposing surfaces 24a and 25a hold both ends of the flexible tube 21a. When a colliding object 26 collides with the bumper side part 3b, tapered surfaces 24b, 25b formed at the rear parts of both extension parts 24, 25 retreat while being guided by upper and lower opening end parts 22b of the bumper beam extension member 22, to collapse upper and lower parts of the flexible tube by the opposing surfaces 24a, 25a. 【課題】簡単な構造で、フレキシブルチューブセンサによる衝突検知範囲をバンパビームの終端を越えて広く設定することができるようにする。【解決手段】バンパビーム１３と衝撃吸収材１５ａとでフレキシブルチューブセンサ２１のフレキシブルチューブを挟持し、又バンパビーム１３と衝撃吸収材１５ａとの終端にバンパビーム張出し部材２２とＥＡ張出し部材２３とを各々連設し、これをバンパサイド部付近まで延在させる。ＥＡ張出し部材２３は上部張出し部２４と下部張出し部２５とに二分割されており、その対向面２４ａ，２５ａにてフレキシブルチューブ２１ａの両端部を挟持する。衝突物２６がバンパサイド部３ｂに衝突すると、両張出し部２４，２５の後部に形成されているテーパ面２４ｂ，２５ｂがバンパビーム張出し部材２２の上下開口端部２２ｂにガイドされながら後退し、対向面２４ａ，２５ａにてフレキシブルチューブの上下が圧潰される。【選択図】図５