FUEL PUMP SUPPORTING STRUCTURE

PROBLEM TO BE SOLVED: To secure supporting rigidity, while reducing the number of positions and times of welding, while reducing the parts count, in a fuel pump supporting structure in which a pump insertion hole is formed at a bottom plate of a fuel tank and a flange part of the fuel pump to be inserted into the pump insertion hole is fixed to the bottom plate from outside of the fuel tank by a set plate.SOLUTION: Bolt insertion holes 35 makes shaft parts 31a of a plurality of projection bolts 31 inserted respectively, into a set plate 37 to fix the set plate 37 to a bottom plate 25. The bolt insertion holes 35 are formed in the bottom plate 25 at a plurality of positions set around a pump insertion hole 28 with the pump insertion hole 28 as a reference while each of the bolt insertion holes 35 has a diameter having a gap with an outer circumstance of the shaft part 31a to avoid contacting with the shaft part 31a. The projection bolts 31 make the shaft parts 31a inserted into the bolt insertion holes 35 from upward, respectively, and a larger diameter head part 31b of each of the projection bolts is liquid-tightly fixed to an upper surface of the bottom plate 25 by projection welding.