JPH0476124B

PURPOSE:To emit static electricity charged electrostatically on an unmanned carrier vehicle without scattering dust by providing a conductive contact possible to be in contact with a facility, such as a tie-in station, etc., at the side plane of a traveling path. CONSTITUTION:At a motor-driven unmanned carrier vehicle 3 that travels according to a derivative 1, conductive contacts 7, 7 are mounted at both side planes respectively. The contact 7 has elasticity, and the direction of the elasticity is in the travelling and the right angle directions of the carrier vehicle 3. The contact 7 is mounted at the side plane of the carrier vehicle 3 with a screw 8 bending a conductive rubber plate. Meanwhile, a collector ring 11 is mounted at the side plane on the travelling side of a tie-in station 10 and is earthed. The end part of the collector ring 11 in the travelling direction is formed obliquely to make ease the travel of the carrier vehicle 3. When the carrier vehicle 3 travels in such a constitution, the contact 7 brings into contact with the collector ring 11, and the static electricity generated with the travel is discharged.