Fuel pump mounting structural body

1. A fuel pump mounting structural body accommodating a fuel pump unit in an opening portion disposed in a fuel tank, the structural body comprising:

a step portion disposed in the opening portion, the step portion being formed one step lower than a wall surface of the fuel tank;

a lid portion of the fuel pump unit, the lid portion fittingly attached to the step portion and including a delivery port for fuel; and

a guide member disposed on a peripheral edge of the opening portion, the guide member including a holding member pressing the lid portion towards the step portion, the holding member being mounted removably, the holding member being formed of a substantially u-shaped sheet-like elastic body,

whereby the fuel pump unit is held in position,

wherein the holding member includes:

a substantially u-shaped engagement member;

a substantially u-shaped pressure member, the pressure member being disposed inside the engagement member; and

the engagement member and the pressure member being connected together by a connection member.

2. The fuel pump mounting structural body according to claim 1 , wherein the engagement member engages the guide member and the pressure member presses the lid portion.

3. The fuel pump mounting structural body according to claim 1 , wherein the pressure member includes a lock portion restricting movement of the holding member by being in abutment against the guide member, and wherein the lock portion is arranged so as not to be released from a condition of being locked with the guide member unless a predetermined operation is executed.

4. The fuel pump mounting structural body according to claim 1 , wherein the lid portion includes at least one protruding portion that abuts on the pressure member to produce a pressing force acting on the lid portion.

5. The fuel pump mounting structural body according to claim 1 , wherein the step portion includes a sealing member disposed on an inner peripheral portion, the lid portion has a bottom portion, abutted against a bottom portion of the step portion, and the sealing member is made to abut against an outer peripheral portion of the lid portion and the step portion to produce a sealing effect.

6. The fuel pump mounting structural body according to claim 5 , wherein the sealing member includes an O-ring having a substantially circular cross section.

7. The fuel pump mounting structural body according to claim 1 , wherein the step portion is disposed on a base member separate from the fuel tank, and the base member is attached to the opening portion through a projection welding process.

8. The fuel pump mounting structural body according to claim 1 , wherein the step portion is formed in a portion of a sheet-like member constituting the fuel tank.

9. A structural body for mounting a fuel pump in an opening of a fuel tank, the structural body comprising:

a step formed in the opening of the fuel tank, the step being formed below a wall surface of the fuel tank;

a lid of the fuel pump, the lid being received by the step;

a guide member disposed on a peripheral edge of the opening; and

a retainer for removably securing the lid of the fuel pump to the guide member to hold the fuel pump in position on the fuel tank, the retainer including:

a substantially u-shaped engagement member;

a substantially u-shaped pressure member, the pressure member being disposed inside the engagement member; and

the engagement member and the pressure member being connected together by a connection member.

10. The structural body according to claim 9 , wherein the retainer is formed of a sheet-like elastic body, and wherein the engagement member engages the guide member and the pressure member presses the lid.

11. The structural body according to claim 9 , wherein the pressure member includes a lock portion restricting movement of the retainer by being in abutment against the guide member, and wherein the lock portion is arranged so as not to be released from a condition of being locked with the guide member unless a predetermined operation is executed.

12. The structural body according to claim 9 , wherein the lid includes at least one protruding portion that abuts on the pressure member to produce a pressing force acting on the lid.

13. The structural body according to claim 9 , wherein the step includes a sealing member disposed on an inner peripheral portion, the lid has a bottom portion, abutted against a bottom portion of the step, and the sealing member is made to abut against an outer peripheral portion of the lid and the step to produce a sealing effect.

14. The structural body according to claim 13 , wherein the sealing member includes an O-ring having a substantially circular cross section.

15. The structural body according to claim 9 , wherein the step is disposed on a base member separate from the fuel tank, and the base member is attached to the opening through a projection welding process.

16. The structural body according to claim 9 , wherein the step is formed in a portion of a sheet-like member constituting the fuel tank.

17. The fuel pump mounting structural body according to claim 1 , wherein the guide member is a plate.

18. The structural body according to claim 1 , wherein the connection portion member is arranged on the centerline of the lid.