(57) [summary] [configuration] Replace the running wheel 24 via the respective left and right front and rear position of the carriage body 21 bottom rotary shaft body 22, as well as mounting the driven sprocket 25 to each of these rotary shaft body, rotating the front of the the drive sprocket 26 mounted on the shaft body, the carriage body, provided with a drive shaft 27 which is operatively connected to the rotary drive 30, mounting an intermediate drive sprocket 31 of the left and right to the drive shaft, and the sprocket 31 To the interlocking connected via a chain 32 to one another and a drive sprocket 26 which corresponds, and among the intermediate drive sprocket, the number of one of the teeth less than the other ones, the travel of the less been sprocket side bogie the copying member 12 of the strip material to the side of the Is a traveling carriage in an automatic welding apparatus having a. Since the running wheels can slow rotating the provided tracking member side to EFFECT cord member, a simple construction while, it is possible to travel along the reliable strip material side of the traveling vehicle.
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