Fuel cut-off unit attachment structure

A fuel cut-off unit attachment structure that is an attachment structure of a fuel cut-off unit that is provided in a fuel tank of a saddle-type vehicle includes a breather passage for discharging volatile fuel to the outside and a valve device for cutting off outflow of liquid fuel,

• wherein the fuel cut-off unit includes an accommodation container constituted of a fitting portion which is inserted into the fuel tank at the time of attachment to the fuel tank and a unit exterior portion which is positioned outside the fuel tank,
• wherein a plurality of first locking portions for performing positioning at the time of attachment to the fuel tank are formed in the fitting portion,
• wherein a penetration hole penetrating from the inside to the outside such that the fitting portion is inserted therethrough is formed in the fuel tank,
• wherein second locking portions for fixing the fuel cut-off unit by causing the first locking portions to be engaged from an inner side of the fuel tank are provided in a circumferential edge portion of the penetration hole,
• wherein the plurality of first locking portions are formed at unequal intervals in a circumferential direction of the fitting portion,
• wherein the accommodation container includes a fixing pedestal which is formed to have a larger diameter than the penetration hole,
• wherein a first elastic member is provided between the fixing pedestal and the fuel tank,
• wherein the circumferential edge portion is provided with a tubular inner wall portion which is formed to protrude in an inward direction of the fuel tank,
• wherein a circumferential wall portion is formed in the circumferential direction on an outer circumferential surface of the accommodation container, and a second elastic member is provided between the circumferential wall portion and the inner wall portion, and
• wherein the first elastic member is a toric dust seal which is formed to have a larger diameter than the fixing pedestal.