| 摘要 |
PURPOSE:To accurately arrange a preheating burner right under a weld zone at all times by integrating the preheating burner with a supporting column and making these movable to the optional position on a fixed surface plate. CONSTITUTION:In a preheating surface plate 2, the supporting column 8 is fitted integrally to a travel rail 12 on which the preheating burner 16 travels to constitute a preheating mechanism 6. This preheating mechanism 6 is mounted on the fixed surface plate 10 so that it can be arranged at the optional position. Moreover, since panel material 4 which is the material to be welded is supported by the preheating mechanism 6, the preheating is certainly performed even in case reinforcing material 30 is welded at any position on the panel material 4.
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