CONDUIT CABLE

PROBLEM TO BE SOLVED: To suppress feeding fluctuation due to vibration of a coil liner 15 in accordance with feeding of a welding wire 4, in a conduit cable for a welding torch used for consumable electrode arc welding. SOLUTION: The conduit cable is formed from a conductor 12 which is connected with a welding torch body 2 at one end and with a wire feeder at the other end and which supplies a welding electric power. The conduit cable includes a hollow part 14 formed nearly in the center of the conduit cable, a coil liner 15 arranged in this hollow part 14 and set to put through a welding wire 4, and a gas passage 16 formed outside the coil liner 15 to make a shielding gas flow through. An expanding/contracting tube 17 sealed with a gas or a liquid is arranged in the gas passage 16, so that the coil liner 15 is fixedly pressed against the inner wall of the hollow part 14 using this tube 17. COPYRIGHT: (C)2007,JPO&INPIT