| 摘要 |
PURPOSE:To improve the safety function by providing a burner which has spark electrodes and receiving terminals and a torch head having a power sourc side terminal and increasing a gap capacity between a power source side terminals removed from the burner larger than a discharge allowing gap. CONSTITUTION:A burner 1 which has spark electrodes 2, 3 at the front end and receiving terminals 4, 5 at the rear, and a torch head 6 which has power source side terminals 7, 8 connected to the terminals 4, 5 by inserting the burner 1, are provided. The gap capacity between the terminals 7 and 8 is increased larger than a discharge allowing gap in the state that the burner 1 is removed from the head 6. In this manner, unexpected ignition in the head can be effectively prevented, thereby enhancing the safety function. |
