| 摘要 |
<p>Provided is a seam-welding roller unit (30) comprising a welding roller (32) to be used for a seam-weld, and a housing (36) for holding the welding roller (32) rotatably. Around the housing (36), there are formed a column-shaped region (42) made coaxial with the welding roller (32), and a positioning step portion (46) for performing an axial positioning. When the housing (36) is removably held in the body of a seam welding apparatus, the column-shaped region (42) and the positioning step portion (46) are brought into abutment against the body of the seam-welding apparatus, thereby to position the welding roller (32). As a result, the replacement of the welding roller is facilitated to enhance the working efficiency of the seam-welding apparatus.</p> |
