| 摘要 |
PROBLEM TO BE SOLVED: To detect a contact without damaging to a vehicle body, and to reduce parts cost. SOLUTION: A first contact detection device 11 which detects the contact with the vehicle body 1 and an obstacle I is mounted with a plurality of the divided buffer objects 12A-12C by widthwise straight line direction from right end side to left end side with adjustment intervals 13 at the rear side of the vehicle body 1. A light projector 21A is mounted at the right side of the divided buffer object 12A and a light receiver 21B is mounted at the left side of the divided buffer object 12B. A light axis R1 formed by the light projector 21A and the light receiver 21B is passing through the left and right divided buffer objects 12A, 12B and the intermediate divided buffer object 12C. Further, light penetration holes 12a-12c which is possible to cut the light axis R by the contact with the obstacle are formed. COPYRIGHT: (C)2009,JPO&INPIT
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