PARTS MOUNTING STRUCTURE OF RESIN HEATING TANK

PROBLEM TO BE SOLVED: To prevent water from leaking even when the number of times of removal of parts is increased. SOLUTION: A parts mounting structure is adapted such that it includes a synthetic resin heating tank 11 where an annular joint section 12 is protruded to the outside of the tank, and parts 14 including a joint piece 22, and the joint piece 22 is joined with the joint section 12 using a bolt 21. A plurality of accommodation recessed section 12b is provided on an outer peripheral surface 12a of the joint section 12, in each of which accommodation recessed sections 12b a metal nut 17 is accommodated, and an annular reinforcing member 19 is brought into close contact with a front surface side annular region of the joint section 12 in water tightness through an annular inner packing 18, with which reinforcing member 19 the joint piece 22 is brought into close contact ion a water tightness through an annular outer packing 20. Further, bolt insertion holes 22d, 20d, 19d, 18d, 12d are provided, which holes penetrate the joint piece 22, the outer packing 20, the reinforcing member 19, the inner packing 18, and the joint section 12 from the outside of the tank and reach each nut 17. The bolt 21 penetrating each bolt insertion hole and threaded into the nut 17 is tightly tightened to secure the foregoing water tight state.