Fueling filler neck device formed with a first resin layer that is stacked on a harder second resin layer

A fueling device in which a fuel nozzle is inserted, the fueling device comprising:

• a filler neck extending axially and having an open end configured to receive fuel injection through the fuel nozzle, the filler neck including a layered structure formed by stacking a first resin layer made of a first resin on a second resin layer made of a second resin, the second resin being harder than the first resin, and the second resin layer being provided on an inner side of the first resin layer;
• and
• a mounting member mounted on the opening side of the filler neck, wherein
• the first resin layer has a higher impact resistance than the second resin layer,
• the second resin layer has a higher fuel permeation resistance than the first resin layer,
• the filler neck including an engagement element and an engagement recess provided around an outer circumference of the open end of the filler neck, the engagement recess being formed in the first resin layer;
• and the engagement element being part of the second resin, extending radially outward from the second resin layer and passing through and beyond the first resin layer, and
• the mounting member having an engagement sleeve mounted on the opening side of the filler neck including a plurality of engagement arms configured to secure the mounting member on the filler neck, one of the plurality of engagement arms engaging with the engagement element of the filler neck, and another one of the plurality of engagement arms engaging with the engagement recess of the filler neck,
• wherein the engagement sleeve of the mounting member includes slits adjacent the plurality of engagement arms, and the one of the plurality of engagement arms engaging with the engagement element of the filler neck includes a through hole receiving the engagement element of the filler neck.