Jet nozzle and jet soldering apparatus

A jet nozzle which allows a width of a flow of jetted molten solder to vary, the jet nozzle comprising:

• a nozzle main body having a rectangular channel section with both opening ends, the one opening end being opposed to a soldering bath and the other opening end jetting the molten solder flow;
• and
• a molten solder flow width varying member that varies a width of the other opening end of the nozzle main body by a slide of the molten solder flow width varying member, wherein the molten solder flow width varying member includes:
• a molten solder flow width varying plate that extends along a jetting direction of the molten solder;
• a rectangular rectifying piece that is attached to the molten solder flow width varying plate at an opposite side of the other opening end of the nozzle main body and extends along a slide direction of the molten solder flow width varying member;
• and
• a sliding shaft that slides the rectifying piece,
• wherein the rectifying piece contains a solder-guiding portion that is obliquely cut away from a side surface of the rectifying piece to a bottom thereof and guides the flow of the molten solder.