| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to perform exchange of a welding wire quickly, at a high speed and efficiently, and to reduce an amount of a welding wire uselessly discharged when exchanging the welding wire.SOLUTION: A roller 33 for measurement and a pressing roller 34, which approaches and is separated from the roller 33 for measurement, are disposed in a casing 30 of a wire measuring instrument 24. When a feeding part 23 is driven so as to perform feed-drive of a welding wire 20 towards a weld torch 2 by holding the welding wire 20 inserted in the wire measuring instrument 24 between the roller 33 for measurement and the pressing roller 34, a feed ratio of the welding wire is detected by rotational frequency detection means 35 connected to the roller 33 fo measurement. Further, a slit 40 for introduction, through which the welding wire 20 spanning the entire length in an axial direction can pass, is formed on a side surface part of the casing 30, and the welding wire 20 is held between the roller 33 for measurement and the pressing roller 34 via the slit 40. |
