SELF-PROPELLED WELDING ROBOT AND WELDING METHOD

To reduce time and labor required for welding a first construction member and a second construction member together.SOLUTION: A self-propelled welding robot 1 includes: a vehicle body 10; a welding machine 11; a first traveling unit 30; a second traveling unit 31; and a moving unit. The first traveling unit 30 can travel in a first arrangement direction D1 in a state of contacting an upper surface of a second construction member 102. The second traveling unit 31 can travel in a second arrangement direction D2 in a state of contacting upper surfaces of a plurality of second construction members 102. The moving unit sets one of the first traveling unit 30 and the second traveling unit 31 into a state of contacting the upper surface of the second construction member 102, by relatively moving the first traveling unit 30 and the second traveling unit 31 in a vertical direction, and sets the other one of the first traveling unit 30 and the second traveling unit 31 into a state of being positioned above the second construction member 102 in the vertical direction.SELECTED DRAWING: Figure 3 【課題】第１建設部材と第２建設部材との溶接に掛かる手間を低減する。【解決手段】自走式溶接ロボット１は、車体１０、溶接機１１、第１走行部３０、第２走行部３１、及び移動部を備える。第１走行部３０は、第２建設部材１０２の上面に接した状態で第１並び方向Ｄ１に走行可能である。第２走行部３１は、複数の第２建設部材１０２の上面に接した状態で第２並び方向Ｄ２に走行可能である。移動部は、第１走行部３０と第２走行部３１とを鉛直方向に相対的に移動させることにより、第１走行部３０と第２走行部３１とのうち一方を第２建設部材１０２の上面に接した状態にし、第１走行部３０と第２走行部３１とのうち他方を第２建設部材１０２よりも鉛直方向の上方に位置させた状態にする。【選択図】図３