To solve the problem of spending time in maintenance of an apparatus since dust, weld fume and the like are accumulated or adhered onto a conductive part at the inside of the apparatus by directly applying air at the outside of the apparatus to a whole circuit part and cooling it.
A welding power source part is stored at the lower part of the inside of a case, a first L-shaped member is mounted on at least one of the left side plate of the case and the top plate of the welding power source part, and a second L-shaped member is mounted on at least one of the right side plate of the case and the top plate of the welding power source part, so that the inside of the case is partitioned into two parts of the upper space on the top plate of the welding power source part and the lower space under the top plate of the welding power source part. The upper space is structurally completely closed, electric elements or substrates are protected from the dust, the weld fume, and like, and accordingly the maintenance time of the apparatus can be reduced.
OYAMA HIDETOSHI
Hiroki Naito
Daisuke Nagano
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