To provide an attachment structure of a backflow prevention device which improves fuel permeation performance, has an uncomplicated structure, and achieves excellent attachability.SOLUTION: A barrier layer 10 for prevention of fuel permeation formed at a resin fuel tank 1 is formed extending continuously into an inlet 2, and a connection member attachment part 21 is formed at an outer wall of a tip of the inlet 2. A backflow prevention device 3 comprises a backflow prevention valve 33 and a cylindrical collar part 31 having an outer diameter smaller than or equal to an inner diameter of the inlet 2. The backflow prevention valve 33 is attached to a first tip part 32 of the collar part 31, and a flange part 35 protruding outward is formed at the other second tip part 34. A bead part 36 having an outer diameter larger than or equal to the inner diameter of the inlet 2 is formed at an outer wall of the collar part 31 which is located closer to the resin fuel tank 1 than the flange part 35. The bead part 36 contacts with an inner wall of the inlet 2 and the flange part 35 contacts with a tip of the inlet 2 to attach the backflow prevention device 3 to the inlet 2.SELECTED DRAWING: Figure 5

    【課題】燃料透過性能を向上させるとともに、構造が複雑でなく、取付性にも優れた逆流防止装置の取付構造を提供する。【解決手段】樹脂製燃料タンク1に形成された燃料透過防止のバリヤ層10がインレット2内にも連続的に延設して形成され、インレット2の先端の外壁には、接続部材取付部21が形成されている。逆流防止装置3は、逆流防止弁33と外径がインレット2の内径以下の筒状のカラー部31から構成され、カラー部31の第1先端部32に逆流防止弁33が取付けられ、他の第2先端部34には、外側に突出する鍔部35が形成され、カラー部31の鍔部35より樹脂製燃料タンク1側の外壁には、外径がインレット2の内径以上のビード部36が形成されている。ビード部36がインレット2の内壁に当接し、鍔部35がインレット2の先端に当接して逆流防止装置3がインレット2に取付けられる。【選択図】図5


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    Title :

    ATTACHMENT STRUCTURE OF BACKFLOW PREVENTION DEVICE


    Additional title:

    逆流防止装置の取付構造


    Contributors:

    Publication date :

    2020-10-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF



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