JP5712881B2 - Fuel tank opening and closing device - Google Patents

Description

本発明は、給油ノズルの移動力を利用してフラップバルブを開いて、燃料タンクへ給油するための燃料タンクの開閉装置に関する。   The present invention relates to a fuel tank opening and closing device for opening a flap valve using a moving force of a fuel nozzle and supplying fuel to a fuel tank.

従来、この種の燃料タンクの開閉装置として、特許文献１，２の技術が知られている。燃料タンクの開閉装置は、燃料タンクへ燃料を供給する燃料通路に第１開口および第２開口を形成するタンク開口形成部材と、第１および第２開口をそれぞれ開閉する第１および第２弁体とを備えている。燃料タンクの開閉装置では、給油の際に、給油ノズルの先端で第１弁体を押し、さらに第２弁体を押すことで第１および第２弁体を順次開いて、給油ノズルを第１および第２開口に挿入した状態にて、給油ノズルから吐出した燃料を燃料通路を介して燃料タンクへ供給している。そして、燃料が満タン液位に達したときに、燃料タンクに接続されている燃料通路内の燃料液位が上昇するから、この燃料液位を給油ノズルの先端に設けた検知部で検出することで、給油を自動的に停止するオートストップ機能を作動させている。   Conventionally, the techniques of Patent Documents 1 and 2 are known as this type of fuel tank opening and closing device. A fuel tank opening and closing device includes a tank opening forming member that forms a first opening and a second opening in a fuel passage that supplies fuel to the fuel tank, and first and second valve bodies that open and close the first and second openings, respectively. And. In the fuel tank opening and closing device, at the time of refueling, the first valve body is pushed at the tip of the fueling nozzle, and further the second valve body is pushed to sequentially open the first and second valve bodies, and the fuel nozzle is moved to the first. The fuel discharged from the fuel filler nozzle is supplied to the fuel tank through the fuel passage while being inserted into the second opening. When the fuel reaches the full tank level, the fuel level in the fuel passage connected to the fuel tank rises, and this fuel level is detected by a detection unit provided at the tip of the fuel supply nozzle. Therefore, the auto stop function that automatically stops refueling is activated.

従来の燃料タンクの開閉装置において、第２弁体は、第２開口との間をガスケットでシールして、燃料タンク側の燃料通路に雨水、塵、砂などが入るのを防止するとともに、調圧弁を設けて、燃料タンク側の燃料通路の圧力を調整している。こうした、第２弁体が雨水などに晒されるのを防止するための遮蔽部材として、第１弁体を設置している。しかし、第１弁体と第２弁体との間の弁間通路は、雨水などの浸入を防止するためのシール性を確保する必要があるが、気密性を高めると、第２弁体の調圧弁の機能を損なう場合がある。このため、雨水などに対するシール性と弁間通路の調圧とを両立させる構成が複雑になるという課題があった。   In the conventional fuel tank opening and closing device, the second valve body is sealed with a gasket between the second opening to prevent rainwater, dust, sand, etc. from entering the fuel passage on the fuel tank side, and to adjust the second valve body. A pressure valve is provided to adjust the pressure of the fuel passage on the fuel tank side. The first valve body is installed as a shielding member for preventing the second valve body from being exposed to rainwater or the like. However, the interval passage between the first valve body and the second valve body needs to ensure a sealing property for preventing the intrusion of rainwater or the like. The function of the pressure regulating valve may be impaired. For this reason, there existed a subject that the structure which balances the sealing performance with respect to rainwater etc. and the pressure regulation of the passage between valves became complicated.

国際公開第２０１１−５３５６３号パンフレットInternational Publication No. 2011-53563 Pamphlet 特表２０１１−５１９７７４Special table 2011-519774

本発明は、上記従来の技術の問題点を解決することを踏まえ、複数の開閉部材で囲まれた燃料通路に対して、雨水などに対するシール性と調圧性とを簡単な構成で両立させた燃料タンクの開閉装置を提供することを目的とする。   In view of solving the above-described problems of the prior art, the present invention provides a fuel passage that is surrounded by a plurality of opening and closing members and that has both a sealing property against rainwater and a pressure regulating property with a simple configuration. An object is to provide a tank opening and closing device.

本発明は、上述の課題の少なくとも一部を解決するためになされたものであり、以下の形態または適用例として実現することが可能である。本発明の一形態は、給油ノズルから吐出される燃料を燃料タンクへ供給する燃料通路を開閉する燃料タンクの開閉装置であって、上記燃料通路と、該燃料通路に配置され第１開口を有する第１開口形成部材と、上記燃料通路内でありかつ上記燃料タンク側に配置され第２開口を有する第２開口形成部材と、該第２開口形成部材よりも上記燃料タンク側に配置される円筒状のパイプ本体部とを有するタンク開口形成部材と；上記第１開口を開閉する第１開閉部材を有する第１フラップバルブ機構と；上記第２開口を開閉する第２開閉部材と、上記第２開口と第２開閉部材とをシールするガスケットとを有する第２フラップバルブ機構と；を備え；上記タンク開口形成部材は；上記第１開口と上記第２開口とを接続する挿入通路を形成するとともに、上記給油ノズルを上記第１開口から上記第２開口へガイドするための通路形成本体と、該通路形成本体の上記第１開口側に形成された通気孔とを有する挿入通路形成部材と；上記挿入通路形成部材の外周側に該挿入通路形成部材と所定間隙を有しかつ上記通気孔に対向して配置された外気通路形成部材と；上記所定間隙と上記通気孔とを通じて、上記挿入通路と外部とを接続する外気通気路と；上記第２開口形成部材と上記パイプ本体部とを接続する台座部と；上記第１開口形成部材の外縁から該第１開口形成部材と一体に筒状に形成され、上記挿入通路形成部材の外周部を覆う側壁部を有するカバー部材と；を備え；上記パイプ本体部は、上記第２開口形成部材と上記パイプ本体部と上記台座部とによってタンク側通路を形成し；上記側壁部に、上記外気通路形成部材が形成され；上記外気通気路は；上記側壁部の内周側と上記パイプ本体部の外周側とによって形成される間隙通路と；上記側壁部の内周側と、上記台座部の外周側と、上記通路形成本体の一部であり、上記第２開口形成部材に接続している傾斜壁の外周側と、によって上記燃料通路に対して環状に形成される環状通路と；上記側壁部の内周側と、上記第１開口形成部材と上記傾斜壁とを接続する接続半筒体の外周側と、によって形成される間隙通路と；が接続されることによって形成されている。このような形態であれば、挿入通路形成部材などに囲まれた挿入通路は、外気通気路により、外部との通気を確保することができ、その調圧を簡単に行なうことができる。また、外気通気路は、挿入通路形成部材と外気通路形成部材との間隙で形成され、しかも、挿入通路に通じる通気孔が外気通路形成部材に対向して配置され、屈曲した通路となっている。よって、外部からの塵などは、外気通気路で除去され、挿入通路に達するのを防止することができる。また、外気通気路は、２つの間隙通路と環状通路とによって接続されている迷路構造として形成されているため、通気孔から燃料通路へと外部の水分や塵などが侵入することをさらに抑制できる。その他、本発明は、以下のような形態として実現することもできる。
SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples. One aspect of the present invention is a fuel tank opening and closing device that opens and closes a fuel passage that supplies fuel discharged from a fuel nozzle to a fuel tank, and has the fuel passage and a first opening disposed in the fuel passage. A first opening forming member; a second opening forming member disposed in the fuel passage and on the fuel tank side and having a second opening; and a cylinder disposed on the fuel tank side with respect to the second opening forming member. A tank opening forming member having a pipe-shaped pipe main body; a first flap valve mechanism having a first opening / closing member for opening / closing the first opening; a second opening / closing member for opening / closing the second opening; A second flap valve mechanism having a gasket for sealing the opening and the second opening / closing member; the tank opening forming member; forming an insertion passage for connecting the first opening and the second opening; An insertion passage forming member having a passage forming body for guiding the oil supply nozzle from the first opening to the second opening, and a vent hole formed on the first opening side of the passage forming body; An outside air passage forming member which has a predetermined gap with the insertion passage forming member on the outer peripheral side of the insertion passage forming member and is arranged to face the vent hole; and the insertion passage through the predetermined gap and the vent hole; An outside air passage for connecting to the outside; a pedestal for connecting the second opening forming member and the pipe body; and a cylindrical shape integrally with the first opening forming member from an outer edge of the first opening forming member A cover member having a side wall portion that covers the outer peripheral portion of the insertion passage forming member; and the pipe body portion includes a tank side passage formed by the second opening forming member, the pipe body portion, and the pedestal portion. Forming the above; The outside air passage forming member is formed in the wall portion; the outside air vent passage; a gap passage formed by an inner peripheral side of the side wall portion and an outer peripheral side of the pipe body portion; and an inner peripheral side of the side wall portion And an outer peripheral side of the pedestal portion and an outer peripheral side of an inclined wall which is a part of the passage forming body and is connected to the second opening forming member, and is formed in an annular shape with respect to the fuel passage. An annular passage; and a gap passage formed by an inner peripheral side of the side wall portion and an outer peripheral side of a connection half cylinder connecting the first opening forming member and the inclined wall. Is formed. With such a configuration, the insertion passage surrounded by the insertion passage formation member or the like can ensure ventilation with the outside by the outside air passage, and the pressure can be adjusted easily. Further, the outside air passage is formed by a gap between the insertion passage forming member and the outside air passage forming member, and a vent hole leading to the insertion passage is disposed to face the outside air passage forming member to form a bent passage. . Therefore, dust from the outside is removed by the outside air passage and can be prevented from reaching the insertion passage. Further, since the outside air passage is formed as a labyrinth structure connected by the two gap passages and the annular passage, it is possible to further suppress the intrusion of external moisture, dust and the like from the vent hole to the fuel passage. . In addition, the present invention can also be realized as the following forms.

［適用例１］
適用例１において、給油ノズルから吐出される燃料を燃料タンクへ供給する燃料通路を開閉する燃料タンクの開閉装置において、
上記燃料通路と、該燃料通路に配置され第１開口を有する第１開口形成部材と、上記燃料通路内でありかつ上記燃料タンク側に配置され該第２開口を有する第２開口形成部材とを有するタンク開口形成部材と、
上記第１開口を開閉する第１開閉部材を有する第１フラップバルブ機構と、
上記第２開口を開閉する第２開閉部材と、上記第２開口と第２開閉部材とをシールするガスケットとを有する第２フラップバルブ機構と、
を備え、
上記タンク開口形成部材は、
上記第１開口と上記第２開口とを接続する挿入通路を形成するとともに、上記給油ノズルを上記第１開口から上記第２開口へガイドするための通路形成本体と、該通路形成本体の上記第１開口側に形成された通気孔とを有する挿入通路形成部材と、
上記挿入通路形成部材の外周側に該挿入通路形成部材と上記所定間隙を有しかつ上記通気孔に対向して配置された外気通路形成部材と、
上記所定間隙と上記通気孔とを通じて、上記挿入通路と外部とを接続する外気通気路と
を備えている。 [Application Example 1]
In Application Example 1, in the fuel tank opening and closing device for opening and closing the fuel passage for supplying the fuel discharged from the fuel nozzle to the fuel tank,
A fuel passage; a first opening forming member disposed in the fuel passage and having a first opening; and a second opening forming member disposed in the fuel passage and on the fuel tank side and having the second opening. A tank opening forming member having,
A first flap valve mechanism having a first opening and closing member for opening and closing the first opening;
A second flap valve mechanism having a second opening and closing member for opening and closing the second opening, and a gasket for sealing the second opening and the second opening and closing member;
With
The tank opening forming member is
A passage forming body for forming an insertion passage connecting the first opening and the second opening, and guiding the oil supply nozzle from the first opening to the second opening, and the first of the passage forming body An insertion passage forming member having a vent hole formed on one opening side;
An outside air passage forming member disposed on the outer peripheral side of the insertion passage forming member and having the predetermined gap from the insertion passage forming member and facing the vent hole;
An outside air passage that connects the insertion passage and the outside through the predetermined gap and the ventilation hole is provided.

適用例１にかかる燃料タンクの開閉装置において、給油ノズルがタンク開口形成部材の燃料通路の第１開口に向けて挿入されると、第１フラップバルブ機構の第１開閉部材が給油ノズルの先端で押され、第１開閉部材が第１開口を開く。さらに、給油ノズルが燃料通路の挿入通路に挿入されて、第２フラップバルブ機構の第２開閉部材が給油ノズルの先端で押されると、第２開閉部材が第２開口を開く。この状態で、給油ノズルから供給される燃料が燃料通路を経て燃料タンクに送られる。   In the fuel tank opening and closing device according to Application Example 1, when the fuel nozzle is inserted toward the first opening of the fuel passage of the tank opening forming member, the first opening and closing member of the first flap valve mechanism is at the tip of the fuel nozzle. When pressed, the first opening / closing member opens the first opening. Furthermore, when the fuel filler nozzle is inserted into the fuel passage insertion passage and the second opening / closing member of the second flap valve mechanism is pushed by the tip of the fuel nozzle, the second opening / closing member opens the second opening. In this state, the fuel supplied from the fuel nozzle is sent to the fuel tank through the fuel passage.

また、上記タンク開口形成部材は、上記第１開口と上記第２開口とを接続する挿入通路を形成するとともに、上記給油ノズルを上記第１開口から上記第２開口へガイドするための挿入通路形成部材と、上記挿入通路形成部材の外周側に所定間隙を有して配置された外気通路形成部材と、上記所定間隙と上記挿入通路形成部材に形成された通気孔とを通じて、上記挿入通路と外部とを接続する外気通気路とを備えている。この構成により、挿入通路形成部材などに囲まれた挿入通路は、外気通気路により、外部との通気を確保することができ、その調圧を簡単に行なうことができる。
また、外気通気路は、挿入通路形成部材と外気通路形成部材との間隙で形成され、しかも、挿入通路に通じる通気孔が外気通路形成部材に対向して配置され、屈曲した通路となっている。よって、外部からの塵などは、外気通気路で除去され、挿入通路に達するのを防止することができる。 The tank opening forming member forms an insertion passage for connecting the first opening and the second opening, and also forms an insertion passage for guiding the fuel supply nozzle from the first opening to the second opening. The insertion passage and the outside through the member, an outside air passage formation member arranged with a predetermined gap on the outer peripheral side of the insertion passage formation member, and a vent hole formed in the predetermined gap and the insertion passage formation member. And an outside air ventilation path for connecting to the outside. With this configuration, the insertion passage surrounded by the insertion passage formation member and the like can ensure ventilation with the outside by the outside air passage and can easily adjust the pressure.
Further, the outside air passage is formed by a gap between the insertion passage forming member and the outside air passage forming member, and a vent hole leading to the insertion passage is disposed to face the outside air passage forming member to form a bent passage. . Therefore, dust from the outside is removed by the outside air passage and can be prevented from reaching the insertion passage.

［適用例２］
適用例２において、上記タンク開口形成部材は、上記第１開口形成部材の外縁から該第１開口形成部材と一体に筒状に形成され、上記挿入通路形成部材の外周部を覆う側壁部を有するカバー部材を備え、上記側壁部に、上記外気通路形成部材が形成されている構成とすることができる。この構成により、外気通路形成部材を設けるのに、簡単かつ部品点数を増加させることもない。 [Application Example 2]
In Application Example 2, the tank opening forming member is formed in a cylindrical shape integrally with the first opening forming member from an outer edge of the first opening forming member, and has a side wall portion that covers an outer peripheral portion of the insertion passage forming member. A cover member may be provided, and the outside air passage forming member may be formed in the side wall portion. With this configuration, the provision of the outside air passage forming member is simple and does not increase the number of parts.

［適用例３］
適用例３において、上記挿入通路形成部材は、上記第１開口から上記第２開口に向けて上記挿入通路の通路面積を狭くするように傾斜した傾斜壁を有している構成をとることができる。この構成により、第２開口から挿入通路に溢れた燃料は、傾斜壁に沿って速やかに戻すことができる。 [Application Example 3]
In Application Example 3, the insertion passage forming member can have a configuration including an inclined wall that is inclined so as to narrow the passage area of the insertion passage from the first opening toward the second opening. . With this configuration, the fuel overflowing from the second opening into the insertion passage can be quickly returned along the inclined wall.

［適用例４］
適用例４において、上記挿入通路形成部材は、筒状に形成された通路形成本体と、該通路形成本体の肉厚を部分的に薄くした脆弱部位とを有し、該脆弱部位は、上記通路形成本体の周方向に沿って形成されている構成をとることができる。この構成により、挿入通路形成部材に所定以上の外力が加わったときに、第２開口形成部材より肉厚が薄い脆弱部位は、第２開口形成部材の一部が破断する前に破断する。よって、第２開口形成部材の周辺部が破断し難く、第２開口形成部材の第２開口のガスケットによるシール性を損なうことがない。 [Application Example 4]
In Application Example 4, the insertion passage forming member has a passage-forming body formed in a cylindrical shape and a fragile portion where the thickness of the passage-forming body is partially reduced. The structure currently formed along the circumferential direction of a formation main body can be taken. With this configuration, when an external force of a predetermined level or more is applied to the insertion passage forming member, the fragile portion having a thickness smaller than that of the second opening forming member is broken before a part of the second opening forming member is broken. Therefore, the peripheral part of the second opening forming member is not easily broken, and the sealing performance by the gasket of the second opening of the second opening forming member is not impaired.

本発明の第１実施例にかかる燃料タンクの開閉装置を説明する斜視図である。1 is a perspective view illustrating a fuel tank opening and closing device according to a first embodiment of the present invention. 燃料タンクの開閉装置の開口部を示す斜視図である。It is a perspective view which shows the opening part of the opening / closing apparatus of a fuel tank. 図２の３−３線に沿った断面図である。FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 2. タンク開口形成部材の一部を破断しかつ分解した斜視図である。It is the perspective view which fractured | ruptured and decomposed | disassembled a part of tank opening formation member. 燃料タンクの開閉装置の一部を分解して示す断面図である。It is sectional drawing which decomposes | disassembles and shows a part of opening / closing apparatus of a fuel tank. 燃料タンクの開閉装置の第１フラップバルブ機構を分解した斜視図である。It is the perspective view which decomposed | disassembled the 1st flap valve mechanism of the opening / closing apparatus of a fuel tank. 第１開閉部材の押圧部材を示す斜視図である。It is a perspective view which shows the press member of a 1st opening / closing member. 第１開閉部材の押圧部材を説明する平面図である。It is a top view explaining the pressing member of the 1st opening and closing member. 開閉起動機構を一部破断しかつ分解した斜視図である。It is the perspective view which fractured | ruptured partially and opened and closed the opening-and-closing starting mechanism. 第１フラップバルブ機構を説明する説明図である。It is explanatory drawing explaining a 1st flap valve mechanism. ロック部材の動きを説明する説明図である。It is explanatory drawing explaining the movement of a locking member. 第２フラップバルブ機構を分解した断面図である。It is sectional drawing which decomposed | disassembled the 2nd flap valve mechanism. 第１および第２フラップバルブ機構の動作ならびに第２開閉部材の形状を説明する説明図である。It is explanatory drawing explaining the operation | movement of a 1st and 2nd flap valve mechanism, and the shape of a 2nd opening-and-closing member. 燃料タンクの開閉装置の上部を示す断面図である。It is sectional drawing which shows the upper part of the opening / closing apparatus of a fuel tank. シール部材を裏面側から見た斜視図である。It is the perspective view which looked at the sealing member from the back side. 燃料タンクの開閉装置の給油動作を説明する説明図である。It is explanatory drawing explaining the oil supply operation | movement of the opening / closing apparatus of a fuel tank. 図１６に続く動作を説明する説明図である。It is explanatory drawing explaining the operation | movement following FIG. 図１７に続く動作を説明する説明図である。It is explanatory drawing explaining the operation | movement following FIG. 図１８に続く動作を説明する説明図である。It is explanatory drawing explaining the operation | movement following FIG. 本発明の第２実施例にかかる燃料タンクの開閉装置を一部破断した斜視図である。It is the perspective view which fractured | ruptured partially the opening / closing apparatus of the fuel tank concerning 2nd Example of this invention. 通路形成部材を示す斜視図である。It is a perspective view which shows a channel | path formation member. シール部材を示す斜視図である。It is a perspective view which shows a sealing member.

Ａ．第１実施例
（１） 燃料タンクの開閉装置の概略構成
図１は本発明の第１実施例にかかる燃料タンクの開閉装置１０を説明する斜視図である。自動車の車体の後部には、燃料を給油するための給油蓋ＦＬが開閉可能に支持されている。給油蓋ＦＬは、車体の外板に倣った蓋本体ＦＬａがヒンジＦＬｂを介して車体の外板に開閉可能に支持されている。給油蓋ＦＬを開いたスペースは、給油室ＦＲになっており、この給油室ＦＲ内に、基板ＢＰに支持された燃料タンクの開閉装置１０が配置されている。燃料タンクの開閉装置１０は、燃料キャップを用いないで、燃料タンクに燃料を供給するための機構であり、給油蓋ＦＬを開いた後に、給油ノズルからの外力で燃料通路に配置した弁を開閉することで、給油ノズルから燃料タンクへ燃料を供給することができる機構である。以下、燃料タンクの開閉装置の詳細な構成について説明する。 A. First Embodiment (1) Schematic Configuration of Fuel Tank Opening / Closing Device FIG. 1 is a perspective view for explaining a fuel tank opening / closing device 10 according to a first embodiment of the present invention. An oil supply lid FL for supplying fuel is supported at the rear part of the vehicle body so as to be openable and closable. The fuel filler lid FL is supported by a lid body FLa following the outer plate of the vehicle body so as to be opened and closed on the outer plate of the vehicle body via a hinge FLb. A space where the fueling lid FL is opened is a fueling chamber FR, and a fuel tank opening / closing device 10 supported by the substrate BP is disposed in the fueling chamber FR. The fuel tank opening / closing device 10 is a mechanism for supplying fuel to the fuel tank without using a fuel cap. After the fuel lid FL is opened, the valve disposed in the fuel passage is opened and closed by an external force from the fuel nozzle. By doing so, it is a mechanism that can supply fuel from the fuel nozzle to the fuel tank. Hereinafter, the detailed configuration of the fuel tank opening and closing device will be described.

（２） 各部の構成および動作
図２は燃料タンクの開閉装置１０の開口部を示す斜視図、図３は図２の３−３線に沿った断面図である。図３において、燃料タンクの開閉装置１０は、燃料タンク（図示省略）に接続される燃料通路１１Ｐを有するタンク開口形成部材１１と、第１フラップバルブ機構３０と、第２フラップバルブ機構５０とを備えている。 (2) Configuration and Operation of Each Part FIG. 2 is a perspective view showing an opening of the fuel tank opening / closing device 10, and FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. In FIG. 3, a fuel tank opening / closing device 10 includes a tank opening forming member 11 having a fuel passage 11P connected to a fuel tank (not shown), a first flap valve mechanism 30, and a second flap valve mechanism 50. I have.

（２）−１ タンク開口形成部材１１
タンク開口形成部材１１は、燃料通路１１Ｐを形成する管体であり、燃料タンクに燃料パイプＰ１を介して接続されたパイプ本体１２と、パイプ本体１２の上端部に装着されたカバー部材２０と、パイプ本体１２の上部に固定されるとともにカバー部材２０内に配置された通路形成部材２４とを備えている。パイプ本体１２の上部でカバー部材２０に囲まれたスペースは、弁間室１１Ｓになっており、その弁間室１１Ｓ内に通路形成部材２４が配置されている。 (2) -1 Tank opening forming member 11
The tank opening forming member 11 is a tube that forms the fuel passage 11P, and includes a pipe body 12 connected to the fuel tank via the fuel pipe P1, a cover member 20 attached to the upper end of the pipe body 12, A passage forming member 24 that is fixed to the upper portion of the pipe body 12 and disposed in the cover member 20 is provided. A space surrounded by the cover member 20 at the upper part of the pipe body 12 is an intervalve chamber 11S, and a passage forming member 24 is disposed in the intervalve chamber 11S.

パイプ本体１２は、円筒部１３と、円筒部１３の下部に形成された第１接続部１３ａと、円筒部１３の下部に形成された第２接続部１３ｂとを備え、これらが一体に形成されている。第１接続部１３ａおよび第２接続部１３ｂの外周部には、パイプの抜止用のファーツリ１３ｃ，１３ｄがそれぞれ形成されており、燃料タンクに接続される燃料パイプＰ１およびブリーザパイプＰ２が第１接続部１３ａおよび第２接続部１３ｂに圧入されることでそれぞれ接続されている。   The pipe body 12 includes a cylindrical portion 13, a first connecting portion 13a formed at the lower portion of the cylindrical portion 13, and a second connecting portion 13b formed at the lower portion of the cylindrical portion 13, and these are integrally formed. ing. The outer peripheral portions of the first connection portion 13a and the second connection portion 13b are formed with ferrules 13c and 13d for preventing the pipe from being removed, and the fuel pipe P1 and the breather pipe P2 connected to the fuel tank are connected to the first connection portion 13a and the second connection portion 13b. They are connected by being press-fitted into the part 13a and the second connection part 13b.

図４はタンク開口形成部材１１の一部を破断しかつ分解した斜視図、図５は燃料タンクの開閉装置１０のタンク開口形成部材１１を分解して示す断面図である。カバー部材２０は、パイプ本体１２の上部に装着され、円筒状の側壁部２１と、第１開口形成部材２２とを備えている。側壁部２１は、円筒状の側壁本体２１ａを備えており、その上部が傾斜し、その傾斜した上部に第１開口形成部材２２が一体形成されている。第１開口形成部材２２は、燃料通路１１Ｐのほぼ中心を通る軸を中心軸ＣＡとすると、中心軸ＣＡに対して直角な面に対して第１角度θ１だけ傾けて配置されている。ここで、中心軸ＣＡは、燃料通路１１Ｐが断面円形の場合の中心線に限らず、通路のほぼ中心を通る線である場合や、燃料通路１１Ｐが曲がった通路でのほぼ中心線である場合も含む。第１開口形成部材２２は、給油ノズルＦＮを挿入するための開口部２３を備えている。開口部２３は、第１開口２３ａと、軸支持部２３ｂと、ノズルラッチ部２３ｃとを備えている。第１開口２３ａは、給油ノズルＦＮを挿入するためのほぼ円形であり、燃料通路１１Ｐの一部を構成しており、燃料通路１１Ｐの通路面積より狭く形成されている。軸支持部２３ｂは、第１開口２３ａの端部に形成され、第１フラップバルブ機構３０の端部を装着支持するための凹所である。ノズルラッチ部２３ｃは、給油時に給油ノズルＦＮの位置決め部ＦＮａを引っ掛けて給油ノズルＦＮを保持するための段部である。カバー部材２０は、側壁部２１の下部の係合爪２１ｂとパイプ本体１２の上部の係合突部１３ｅとの係合手段によってパイプ本体１２に装着されている。   4 is a perspective view in which a part of the tank opening forming member 11 is broken and disassembled, and FIG. 5 is an exploded sectional view of the tank opening forming member 11 of the fuel tank opening and closing device 10. The cover member 20 is attached to the upper portion of the pipe body 12 and includes a cylindrical side wall portion 21 and a first opening forming member 22. The side wall portion 21 includes a cylindrical side wall main body 21a, and an upper portion thereof is inclined, and a first opening forming member 22 is integrally formed on the inclined upper portion. The first opening forming member 22 is disposed so as to be inclined by a first angle θ1 with respect to a plane perpendicular to the central axis CA, where an axis passing through substantially the center of the fuel passage 11P is a central axis CA. Here, the central axis CA is not limited to the center line when the fuel passage 11P has a circular cross section, but is a line that passes through substantially the center of the passage, or when the fuel passage 11P is a substantially center line in a curved passage. Including. The first opening forming member 22 includes an opening 23 for inserting the fuel supply nozzle FN. The opening 23 includes a first opening 23a, a shaft support portion 23b, and a nozzle latch portion 23c. The first opening 23a is substantially circular for inserting the fuel supply nozzle FN, constitutes a part of the fuel passage 11P, and is formed narrower than the passage area of the fuel passage 11P. The shaft support portion 23b is a recess formed at the end portion of the first opening 23a for mounting and supporting the end portion of the first flap valve mechanism 30. The nozzle latch part 23c is a step part for holding the fueling nozzle FN by hooking the positioning part FNa of the fueling nozzle FN during fueling. The cover member 20 is attached to the pipe body 12 by engagement means between an engagement claw 21b at the lower part of the side wall part 21 and an engagement protrusion 13e at the upper part of the pipe body 12.

通路形成部材２４は、弁間室１１Ｓ内に配置されており、燃料通路１１Ｐを燃料タンク側の通路であるタンク側通路１１Ｐｂに区画する部材であり、台座部２５と、第２開口形成部材２６と、挿入通路形成部材２７とを備え、これらを一体に形成した部材である。台座部２５は、その上部が傾斜した円筒状の台座本体２５ａと、台座本体２５ａの下部の溶着固定部２５ｂとを備えており、溶着固定部２５ｂがパイプ本体１２の上端部１３ｆに熱溶着されることでパイプ本体１２と一体に形成されている。第２開口形成部材２６は、第１開口形成部材２２より燃料タンク側であって、燃料通路１１Ｐの中心軸ＣＡに対して直角な面を想定すると、該直角な面に対して第２角度θ２だけ傾けて配置されている。第２開口形成部材２６は、第２開口２６ａを備えている。第２開口２６ａは、給油ノズルＦＮを挿入するためのほぼ円形の通路であり、燃料通路１１Ｐの一部を構成しており、燃料通路１１Ｐの通路面積より狭く形成されている。   The passage forming member 24 is disposed in the inter-valve chamber 11S, and is a member that divides the fuel passage 11P into a tank side passage 11Pb that is a passage on the fuel tank side, and includes a pedestal portion 25 and a second opening forming member 26. And an insertion passage forming member 27, which are integrally formed. The pedestal portion 25 includes a cylindrical pedestal main body 25 a whose upper portion is inclined, and a welding fixing portion 25 b below the pedestal main body 25 a, and the welding fixing portion 25 b is thermally welded to the upper end portion 13 f of the pipe main body 12. Thus, it is formed integrally with the pipe body 12. The second opening forming member 26 is closer to the fuel tank than the first opening forming member 22, and assuming a plane perpendicular to the central axis CA of the fuel passage 11P, the second angle θ2 with respect to the perpendicular plane. Just tilted. The second opening forming member 26 includes a second opening 26a. The second opening 26a is a substantially circular passage for inserting the fuel supply nozzle FN, constitutes a part of the fuel passage 11P, and is formed narrower than the passage area of the fuel passage 11P.

挿入通路形成部材２７は、燃料通路１１Ｐに挿入された給油ノズルＦＮをガイドするとともに、第１開口形成部材２２の第１開口２３ａと第２開口形成部材２６の第２開口２６ａとを接続する部材であり、燃料通路１１Ｐの一部を挿入通路１１Ｐａとした通路形成本体２８を備えている。通路形成本体２８は、傾斜壁２８ａと、接続半筒体２８ｂとを備えている。傾斜壁２８ａは、第２開口２６ａに向けて通路面積を狭くした円錐形状であり、つまり挿入通路１１Ｐａに入った燃料を第２開口２６ａに向けて速やかに流すように傾斜している。また、接続半筒体２８ｂは、傾斜壁２８ａの上端に一体に形成されており、傾斜した第１開口形成部材２２に接続されるために、円筒を斜めに切断した形状になっている。また、挿入通路形成部材２７の下部であって、第２開口形成部材２６との接続部位には、脆弱部位２７ａが周方向に沿って全周に形成されている。脆弱部位２７ａは、挿入通路形成部材２７に所定以上の外力が加わったときに、第２開口形成部材２６の一部が破断する前に破断するように、挿入通路形成部材２７を部分的に薄肉に形成した部位である。
なお、挿入通路形成部材２７内の挿入通路１１Ｐａは、カバー部材２０と挿入通路形成部材２７との間に設けられた外気通気路１１Ｐｃを介して外部に接続され、また、その一部が外部に対してシールされているが、これらの構成については後述する。 The insertion passage forming member 27 guides the fuel supply nozzle FN inserted into the fuel passage 11P and connects the first opening 23a of the first opening forming member 22 and the second opening 26a of the second opening forming member 26. And a passage forming body 28 having a part of the fuel passage 11P as an insertion passage 11Pa. The passage forming body 28 includes an inclined wall 28a and a connection half cylinder 28b. The inclined wall 28a has a conical shape with a passage area narrowed toward the second opening 26a. In other words, the inclined wall 28a is inclined so that the fuel that has entered the insertion passage 11Pa flows promptly toward the second opening 26a. Further, the connection half cylinder 28b is formed integrally with the upper end of the inclined wall 28a, and has a shape obtained by obliquely cutting the cylinder in order to be connected to the inclined first opening forming member 22. In addition, at the lower portion of the insertion passage forming member 27 and at the connection portion with the second opening forming member 26, a fragile portion 27a is formed on the entire circumference along the circumferential direction. The weakened portion 27a is formed by partially thinning the insertion passage forming member 27 so that when a predetermined external force is applied to the insertion passage forming member 27, the second opening forming member 26 is broken before a part thereof is broken. It is the site | part formed in.
The insertion passage 11Pa in the insertion passage formation member 27 is connected to the outside via an outside air passage 11Pc provided between the cover member 20 and the insertion passage formation member 27, and a part of the insertion passage 11Pa is outside. Although these are sealed, these configurations will be described later.

（２）−２ 第１フラップバルブ機構３０
図６は燃料タンクの開閉装置１０の第１フラップバルブ機構３０を分解した斜視図である。第１フラップバルブ機構３０は、給油ノズルの挿入に連動して第１開口２３ａを開閉するための機構であり、カバー部材２０に固定されている。第１フラップバルブ機構３０は、第１開閉部材３１と、第１軸受部３７と、開閉起動機構４０とを備えている。第１開閉部材３１は、第１開口２３ａを開閉する押圧部材３２と、底蓋３６とを備えている。 (2) -2 First flap valve mechanism 30
FIG. 6 is an exploded perspective view of the first flap valve mechanism 30 of the fuel tank opening and closing device 10. The first flap valve mechanism 30 is a mechanism for opening and closing the first opening 23 a in conjunction with the insertion of the fueling nozzle, and is fixed to the cover member 20. The first flap valve mechanism 30 includes a first opening / closing member 31, a first bearing portion 37, and an opening / closing activation mechanism 40. The first opening / closing member 31 includes a pressing member 32 that opens and closes the first opening 23 a and a bottom lid 36.

図７は押圧部材３２を示す斜視図、図８は押圧部材３２を説明する平面図である。押圧部材３２は、押圧部３３と、ガイド部３４と、第１軸部３５とを備えている。押圧部３３は、所定の外径の給油ノズルＦＮで押される押圧面３３ａと、押圧面３３ａの外縁に沿いかつ押圧面３３ａの少なくとも一部をＵ字形に囲むように立設された規制壁３３ｂと、規制壁３３ｂのない自由端側の平坦部３３ｃを備えている。規制壁３３ｂは、給油ノズルＦＮの外径とほぼ同じ内径で規制された規制領域３３Ｓを形成している。図８に示すように、ガソリン用の給油ノズルＦＮの外径をＤ（Ｇ）とし、軽油用の給油ノズルＦＮ（Ｌ）の外径をＤ（Ｌ）とすると、規制領域３３Ｓの内径Ｄ１は、Ｄ（Ｇ）＜Ｄ１＜Ｄ（Ｌ）に設定されている。ガイド部３４は、規制壁３３ｂの上部に向けて傾斜した第１ガイド斜面３４ａ、第２ガイド斜面３４ｂと、第３ガイド斜面３４ｃとを備え、第１軸部３５と反対側である押圧部３３の一部だけにガイド斜面を設けないＵ字形に囲んでおり、給油ノズルＦＮの先端を規制領域３３Ｓに導く斜面である。   FIG. 7 is a perspective view showing the pressing member 32, and FIG. 8 is a plan view illustrating the pressing member 32. The pressing member 32 includes a pressing portion 33, a guide portion 34, and a first shaft portion 35. The pressing portion 33 includes a pressing surface 33a that is pressed by an oil supply nozzle FN having a predetermined outer diameter, and a regulation wall 33b that is erected so as to surround at least a part of the pressing surface 33a in a U shape along the outer edge of the pressing surface 33a. And a flat portion 33c on the free end side without the restriction wall 33b. The regulation wall 33b forms a regulation region 33S regulated with an inner diameter that is substantially the same as the outer diameter of the fuel supply nozzle FN. As shown in FIG. 8, when the outer diameter of the gasoline supply nozzle FN is D (G) and the outer diameter of the light oil supply nozzle FN (L) is D (L), the inner diameter D1 of the restriction region 33S is , D (G) <D1 <D (L). The guide portion 34 includes a first guide inclined surface 34a, a second guide inclined surface 34b, and a third guide inclined surface 34c that are inclined toward the upper portion of the restriction wall 33b, and the pressing portion 33 that is opposite to the first shaft portion 35. A guide slope is not provided on only a part of the U-shape, and the tip of the oil supply nozzle FN is a slope leading to the restriction region 33S.

図６において、第１軸部３５は、押圧部材３２の端部から突設された軸基部３５ａと、軸基部３５ａの両側に突設した軸体３５ｂとを備えている。軸体３５ｂは、第１軸受部３７に支持される軸である。底蓋３６は、押圧部材３２の下部に配置される部材であり、一端部を切り欠いた円板形状の蓋本体３６ａと、底蓋３６の外周部に沿って突設された位置決め用円弧３６ｂとを備えている。位置決め用円弧３６ｂは、押圧部材３２の嵌合円弧部３２ｂに嵌合することにより、押圧部材３２と底蓋３６とにより収納室３１Ｓ（図５参照）が形成されている。収納室３１Ｓには、開閉起動機構４０の一部の部品が収納されている。第１軸受部３７は、開口部２３の軸支持部２３ｂに装着されることで、第１開閉部材３１を開閉可能に支持する部材であり、支持基部３７ａと、支持基部３７ａの両側に形成された軸受孔３７ｂと、スプリング片３７ｃとを備える。軸受孔３７ｂは、第１軸部３５の軸体３５ｂを嵌入することで、第１開閉部材３１を開閉可能に支持している。スプリング片３７ｃは、支持基部３７ａの上端から突設された片持ち片で形成されており、第１軸部３５の軸基部３５ａを押圧することで第１開閉部材３１を閉弁方向に付勢している。   In FIG. 6, the first shaft portion 35 includes a shaft base portion 35a protruding from the end of the pressing member 32 and shaft bodies 35b protruding from both sides of the shaft base portion 35a. The shaft body 35 b is a shaft that is supported by the first bearing portion 37. The bottom lid 36 is a member disposed below the pressing member 32, and has a disc-shaped lid body 36 a with one end cut out, and a positioning arc 36 b that protrudes along the outer periphery of the bottom lid 36. And. The positioning arc 36b is fitted to the fitting arc portion 32b of the pressing member 32, whereby the pressing member 32 and the bottom cover 36 form a storage chamber 31S (see FIG. 5). A part of the opening / closing activation mechanism 40 is stored in the storage chamber 31S. The first bearing portion 37 is a member that supports the first opening / closing member 31 so as to be openable and closable by being attached to the shaft support portion 23b of the opening 23, and is formed on both sides of the support base portion 37a and the support base portion 37a. Bearing hole 37b and spring piece 37c. The bearing hole 37b supports the first opening / closing member 31 so as to be openable and closable by fitting the shaft body 35b of the first shaft portion 35 therein. The spring piece 37c is formed by a cantilever piece protruding from the upper end of the support base portion 37a, and presses the shaft base portion 35a of the first shaft portion 35 to urge the first opening / closing member 31 in the valve closing direction. doing.

図９は開閉起動機構４０を分解した斜視図である。開閉起動機構４０は、所定の外径の給油ノズルの先端で押されることにより、第１フラップバルブ機構３０の第１開閉部材３１のロック位置を解除する機構であり、ノズル検知部材４２と、ロック機構４５とを備えている。ノズル検知部材４２は、検知部４２ａと、検知部４２ａとともにＬ字形を形成する連結部４２ｂと、軸部４２ｃと、軸部４２ｃから突設された連結ピン４２ｄとを備えている。検知部４２ａは、給油ノズルＦＮの先端で押される部位であり、押圧部材３２の規制壁３３ｂに形成された装着孔３２ｃから規制領域３３Ｓに向けて露出している。軸部４２ｃは、押圧部材３２の下部の軸支部３２ｄと底蓋３６の凹所３６ｃから突設された支持突出片３６ｄの軸支部３６ｅとにより挟持されることにより、揺動可能に支持されている。   FIG. 9 is an exploded perspective view of the opening / closing activation mechanism 40. The opening / closing activation mechanism 40 is a mechanism that releases the lock position of the first opening / closing member 31 of the first flap valve mechanism 30 by being pushed by the tip of a fueling nozzle having a predetermined outer diameter. And a mechanism 45. The nozzle detection member 42 includes a detection portion 42a, a connection portion 42b that forms an L shape with the detection portion 42a, a shaft portion 42c, and a connection pin 42d that protrudes from the shaft portion 42c. The detection portion 42a is a portion that is pressed by the tip of the fuel supply nozzle FN, and is exposed toward the restriction region 33S from the mounting hole 32c formed in the restriction wall 33b of the pressing member 32. The shaft portion 42c is supported so as to be swingable by being sandwiched between a shaft support portion 32d below the pressing member 32 and a shaft support portion 36e of a support projecting piece 36d projecting from a recess 36c of the bottom cover 36. Yes.

ロック機構４５は、ノズル検知部材４２に連動する機構であり、ロック部材４６と、被ロック部４８とを備えている。ロック部材４６は、板状のロック本体４６ａと、ロック係合部４６ｂと、ピン連結部４６ｃと、連結溝４６ｄと、スプリング片４６ｅとを備えている。ロック係合部４６ｂは、ロック本体４６ａの両側に形成されており、被ロック部４８と係合・係脱する部位である。ピン連結部４６ｃは、ロック本体４６ａの一端から突設された片持ち片であり、連結溝４６ｄを形成している。連結溝４６ｄは、ノズル検知部材４２の連結ピン４２ｄを嵌入させている。スプリング片４６ｅは、ロック部材４６に復帰力を付勢する部材である。被ロック部４８は、ロック部材４６の両側に配置されており、被ロック本体４８ａと、被ロック本体４８ａに形成されロック部材４６のロック係合部４６ｂが挿入される挿入孔４８ｂとを備えている。また、被ロック本体４８ａには、挿入孔４８ｂに挿入されたロック部材４６が、矢印方向に移動することでロック位置と非ロック位置とを切り換える被ロック部４８ｃおよび係脱穴４８ｄが形成されている。   The lock mechanism 45 is a mechanism that interlocks with the nozzle detection member 42 and includes a lock member 46 and a locked portion 48. The lock member 46 includes a plate-shaped lock main body 46a, a lock engagement portion 46b, a pin connection portion 46c, a connection groove 46d, and a spring piece 46e. The lock engaging portions 46b are formed on both sides of the lock main body 46a, and are portions that engage with and disengage from the locked portion 48. The pin connecting portion 46c is a cantilever piece projecting from one end of the lock body 46a and forms a connecting groove 46d. The connection groove 46d is engaged with the connection pin 42d of the nozzle detection member 42. The spring piece 46e is a member that urges the locking member 46 to return force. The locked portion 48 is disposed on both sides of the lock member 46, and includes a locked main body 48a and an insertion hole 48b formed in the locked main body 48a and into which the lock engaging portion 46b of the lock member 46 is inserted. Yes. The locked body 48a is formed with a locked portion 48c and an engagement / disengagement hole 48d that switch between a locked position and an unlocked position when the locking member 46 inserted into the insertion hole 48b moves in the direction of the arrow. Yes.

図１０および図１１により開閉起動機構４０の動作について説明する。図１０は第１フラップバルブ機構３０を断面で示す説明図、図１１はロック部材４６の動きを説明する説明図であり、図１０（Ａ），図１１（Ａ）が開閉起動機構４０のロック位置、図１０（Ｂ），図１１（Ｂ）が開閉起動機構４０の非ロック位置を示す。図１０（Ａ）において、第１開閉部材３１の上面から露出しているノズル検知部材４２の検知部４２ａが給油ノズルＦＮの先端により押されると、図１０（Ｂ）に示すように、ノズル検知部材４２が軸部４２ｃを中心に回動する。ノズル検知部材４２の連結ピン４２ｄは、ロック部材４６の連結溝４６ｄに嵌入しているから、図１１に（Ａ）から図１１（Ｂ）に示すように、ノズル検知部材４２に連動してロック部材４６が矢印方向に移動する。このとき、ロック部材４６のスプリング片４６ｅは、底蓋３６の位置決め用円弧３６ｂに当たっているから、撓みながらスプリング力を生じつつ、ロック部材４６が矢印方向へ移動する。そして、ロック部材４６のロック係合部４６ｂが被ロック部４８の被ロック部４８ｃに対して係合していた状態から係脱穴４８ｄへ移動することで、ロック位置から非ロック位置へ切り換えられ、つまり、開閉起動機構４０のロック位置が解除され、第１開閉部材３１の開き動作が可能になる。   The operation of the opening / closing activation mechanism 40 will be described with reference to FIGS. 10 is an explanatory view showing the first flap valve mechanism 30 in cross section, FIG. 11 is an explanatory view for explaining the movement of the lock member 46, and FIGS. 10 (A) and 11 (A) show the lock of the opening / closing start mechanism 40. FIG. 10B and FIG. 11B show the unlocked position of the opening / closing activation mechanism 40. In FIG. 10A, when the detection portion 42a of the nozzle detection member 42 exposed from the upper surface of the first opening / closing member 31 is pushed by the tip of the fuel supply nozzle FN, as shown in FIG. The member 42 rotates around the shaft portion 42c. Since the connecting pin 42d of the nozzle detecting member 42 is fitted in the connecting groove 46d of the locking member 46, as shown in FIGS. 11 (A) to 11 (B), the connecting pin 42d is locked in conjunction with the nozzle detecting member 42. The member 46 moves in the direction of the arrow. At this time, since the spring piece 46e of the lock member 46 is in contact with the positioning arc 36b of the bottom cover 36, the lock member 46 moves in the arrow direction while generating a spring force while being bent. Then, the lock engaging portion 46b of the lock member 46 is moved from the state engaged with the locked portion 48c of the locked portion 48 to the engagement / disengagement hole 48d, so that the lock position is switched to the unlocked position. That is, the lock position of the opening / closing activation mechanism 40 is released, and the opening operation of the first opening / closing member 31 becomes possible.

（２）−３ 第２フラップバルブ機構５０
図１２は第２フラップバルブ機構５０を分解した断面図である。第２フラップバルブ機構５０は、第２開口２６ａを開閉する機構であり、第２開閉部材５１と、第２軸受部５８と、スプリング５９と、ガスケットＧＳと、調圧弁６０とを備えている。
第２開閉部材５１は、押圧部材５２と、弁室形成部材５５と、弁室形成部材５５の端部に形成された第２軸部５６とを備えている。押圧部材５２は、給油ノズルＦＮにより押圧される上面部５３と、上面部５３の外周から突設された側壁部５４とを備え、下方に開放した皿状に形成されている。上面部５３には、摺動面５３ａが形成されている。図１３（Ａ）に示すように、摺動面５３ａは、第１開閉部材３１の端部を摺動させる面である。すなわち、第１フラップバルブ機構３０の第１開閉部材３１が開き動作したときに、摺動面５３ａは、第１開閉部材３１の自由端３１ａに形成された摺動端３１ｂに押されて、線接触しつつ摺動する湾曲面に形成されている。図１３（Ｂ）の第２開閉部材５１の平面図で示すように、第２開閉部材５１の第２軸部５６から第２開閉部材５１の自由端５１ａへ向かう方向を第１方向Ｘ、該第１方向Ｘと直角の方向を第２方向Ｙとする。第２開閉部材５１は、自由端５１ａ側に段部５３ｂを設け、その段部５３ｂから摺動面５３ａの端部が形成されている。また、摺動面５３ａは、第２開閉部材５１の中心から第１方向Ｘに向かうにつれて第２方向Ｙにおける摺動端３１ｂとの接触面積が小さくなるとともに、板厚方向に凹んだ楕円形状の湾曲面であって、摺動端３１ｂと第２方向Ｙで線接触するように形成されている。 (2) -3 Second flap valve mechanism 50
FIG. 12 is an exploded sectional view of the second flap valve mechanism 50. The second flap valve mechanism 50 is a mechanism for opening and closing the second opening 26a, and includes a second opening / closing member 51, a second bearing portion 58, a spring 59, a gasket GS, and a pressure regulating valve 60.
The second opening / closing member 51 includes a pressing member 52, a valve chamber forming member 55, and a second shaft portion 56 formed at the end of the valve chamber forming member 55. The pressing member 52 includes an upper surface portion 53 that is pressed by the fuel supply nozzle FN and a side wall portion 54 that protrudes from the outer periphery of the upper surface portion 53, and is formed in a dish shape that opens downward. A sliding surface 53 a is formed on the upper surface portion 53. As shown in FIG. 13A, the sliding surface 53 a is a surface that slides the end portion of the first opening / closing member 31. That is, when the first opening / closing member 31 of the first flap valve mechanism 30 opens, the sliding surface 53a is pushed by the sliding end 31b formed at the free end 31a of the first opening / closing member 31, It is formed on a curved surface that slides in contact. As shown in the plan view of the second opening / closing member 51 of FIG. 13B, the direction from the second shaft portion 56 of the second opening / closing member 51 toward the free end 51a of the second opening / closing member 51 is the first direction X, A direction perpendicular to the first direction X is defined as a second direction Y. The second opening / closing member 51 is provided with a step portion 53b on the free end 51a side, and an end portion of the sliding surface 53a is formed from the step portion 53b. In addition, the sliding surface 53a has an elliptical shape that is recessed in the plate thickness direction as the contact area with the sliding end 31b in the second direction Y decreases from the center of the second opening / closing member 51 in the first direction X. It is a curved surface and is formed so as to be in line contact with the sliding end 31b in the second direction Y.

図１２において、弁室形成部材５５は、カップ形状であり、押圧部材５２と接合されることで調圧弁６０を収納する弁室５１Ｓを形成している。弁室形成部材５５の外周部には、フランジ５５ｂが形成されている。ガスケットＧＳは、ゴム材料から形成されており、フランジ５５ｂの内周側の上面と押圧部材５２の外周開口周縁部との間で挟持されることで保持され、第２開口形成部材２６のシール段部２６ｂとの間で圧縮されることで第２開口２６ａをシールしている。   In FIG. 12, the valve chamber forming member 55 has a cup shape, and is joined to the pressing member 52 to form a valve chamber 51 </ b> S that houses the pressure regulating valve 60. A flange 55 b is formed on the outer peripheral portion of the valve chamber forming member 55. The gasket GS is formed of a rubber material and is held by being sandwiched between the upper surface on the inner peripheral side of the flange 55b and the outer peripheral opening peripheral edge of the pressing member 52, and the seal stage of the second opening forming member 26 The second opening 26a is sealed by being compressed between the portion 26b.

第２軸受部５８は、パイプ本体１２の内壁に装着された支持本体５８ａと、支持本体５８ａに形成された軸支孔５８ｂとを備えており、軸支孔５８ｂで第２開閉部材５１の第２軸部５６を軸支持することにより、第２開閉部材５１を回動可能に支持している。スプリング５９は、弦巻スプリングであり、そのコイル状の一端部が第２軸受部５８に支持され、他端部が第２開閉部材５１の下面に支持されて第２開閉部材５１を閉じる方向に付勢している。第２軸受部５８が第２開閉部材５１を軸支することにより、第２開閉部材５１は、第２軸部５６を支点として自由端５１ａが動くように開閉動作する。   The second bearing portion 58 includes a support body 58a attached to the inner wall of the pipe body 12, and a shaft support hole 58b formed in the support body 58a. The second opening / closing member 51 is rotatably supported by supporting the biaxial portion 56. The spring 59 is a string-wound spring, and one end portion of the coil shape is supported by the second bearing portion 58 and the other end portion is supported by the lower surface of the second opening / closing member 51 so as to close the second opening / closing member 51. It is fast. When the second bearing portion 58 pivotally supports the second opening / closing member 51, the second opening / closing member 51 opens and closes so that the free end 51a moves with the second shaft portion 56 as a fulcrum.

調圧弁６０は、弁室５１Ｓ内に収納されており、スプリング６１ａにより付勢された正圧弁体６１ｂを有する正圧弁６１と、スプリング６２ａにより付勢された負圧弁体６２ｂを有する負圧弁６２とを備え、燃料タンクの圧力を両弁体の開閉により燃料タンクのタンク内圧を所定範囲内に調整する。   The pressure regulating valve 60 is housed in the valve chamber 51S, and includes a positive pressure valve 61 having a positive pressure valve body 61b biased by a spring 61a, and a negative pressure valve 62 having a negative pressure valve body 62b biased by a spring 62a. The fuel tank pressure is adjusted within a predetermined range by opening and closing both valve bodies.

（２）−４ 外気通路およびシール機構
図１４は燃料タンクの開閉装置１０の上部を示す断面図である。上述したように、挿入通路形成部材２７と第１開閉部材３１とにより囲まれたスペースは、挿入通路１１Ｐａに形成されている。挿入通路１１Ｐａは、タンク側通路１１Ｐｂと比べて高い気密性を有しないが、外部との通気性を確保するとともに、塵などを防ぐためのシール性を有している。すなわち、第１開口形成部材２２の第１開口２３ａの開口周縁部と挿入通路形成部材２７の第１開口２３ａ側との配置されたシール部材２９が配置されている。図１５はシール部材２９を裏面側（図示の下方から側）から見た斜視図である。シール部材２９は、ゴム製のシール材から円形に形成されており、シール本体２９ａと、第１開口２３ａとほぼ同径の開口２９ｂと、第１シール部２９ｃと、第２シール部２９ｄと、装着用開口２９ｅとを備えている。第１シール部２９ｃは、第１開口２３ａの開口周縁であって、第１開閉部材３１の外周部のシール面３２ｅにより押圧される部位である。第２シール部２９ｄは、第１シール部２９ｃより外周であって第１開口形成部材２２の開口周縁部２３ｄと挿入通路形成部材２７とにより挟持される部位である。シール部材２９により、第１開口形成部材２２、第１開閉部材３１および挿入通路形成部材２７で囲まれた挿入通路１１Ｐａをシールしている。
また、カバー部材２０の側壁部２１、挿入通路形成部材２７、第２開口形成部材２６、台座部２５、円筒部１３で囲まれたスペースおよび間隙により、外気通気路１１Ｐｃが形成されている。挿入通路形成部材２７の上部には、通気孔２７ｂが形成されている。また、通気孔２７ｂに対向して、側壁部２１の一部を構成する外気通路形成部材２１ｃが所定間隙Ｌｐを隔てて配置されている。外気通気路１１Ｐｃは、側壁部２１とパイプ本体１２との間隙通路１１Ｐｃ１、側壁部２１と台座部２５および第２開口形成部材２６との環状通路１１Ｐｃ２、側壁部２１と挿入通路形成部材２７の接続半筒体２８ｂとの間隙通路１１Ｐｃ３、通気孔２７ｂを通じて、外部と挿入通路１１Ｐａと迷路構造により接続している。 (2) -4 Outside Air Passage and Seal Mechanism FIG. 14 is a cross-sectional view showing the upper part of the fuel tank switching device 10. As described above, the space surrounded by the insertion path forming member 27 and the first opening / closing member 31 is formed in the insertion path 11Pa. The insertion passage 11Pa does not have high airtightness compared to the tank side passage 11Pb, but has sealing properties for ensuring air permeability to the outside and preventing dust and the like. In other words, the sealing member 29 is arranged between the opening peripheral edge of the first opening 23 a of the first opening forming member 22 and the first opening 23 a side of the insertion passage forming member 27. FIG. 15 is a perspective view of the seal member 29 as viewed from the back side (from the lower side in the drawing). The seal member 29 is formed in a circular shape from a rubber seal material, and includes a seal body 29a, an opening 29b having substantially the same diameter as the first opening 23a, a first seal portion 29c, a second seal portion 29d, And a mounting opening 29e. The first seal portion 29 c is an opening peripheral edge of the first opening 23 a and is a portion pressed by the seal surface 32 e of the outer peripheral portion of the first opening / closing member 31. The second seal portion 29 d is a portion that is located on the outer periphery of the first seal portion 29 c and is sandwiched between the opening peripheral portion 23 d of the first opening forming member 22 and the insertion passage forming member 27. The sealing member 29 seals the insertion passage 11Pa surrounded by the first opening forming member 22, the first opening / closing member 31, and the insertion passage forming member 27.
Further, the outside air ventilation path 11Pc is formed by the space and the gap surrounded by the side wall portion 21, the insertion passage forming member 27, the second opening forming member 26, the pedestal portion 25, and the cylindrical portion 13 of the cover member 20. A vent hole 27 b is formed in the upper portion of the insertion passage forming member 27. Further, an outside air passage forming member 21c that constitutes a part of the side wall portion 21 is disposed opposite to the vent hole 27b with a predetermined gap Lp therebetween. The outside air passage 11Pc includes a gap passage 11Pc1 between the side wall portion 21 and the pipe body 12, an annular passage 11Pc2 between the side wall portion 21 and the pedestal portion 25 and the second opening forming member 26, and a connection between the side wall portion 21 and the insertion passage forming member 27. The external passage is connected to the insertion passage 11Pa by a labyrinth structure through the gap passage 11Pc3 and the vent hole 27b with the half cylinder 28b.

（３） 燃料タンクの開閉装置１０の開閉動作
次に、燃料タンクの開閉装置１０への給油ノズルＦＮによる給油動作について説明する。
（３）−１ 開き動作
図１に示すように、給油蓋ＦＬを開けると、給油室ＦＲ内に配置された燃料タンクの開閉装置１０が表れる。図１６に示すように、給油ノズルＦＮを第１開口２３ａに挿入して、給油ノズルＦＮの先端が第１開閉部材３１の押圧面３３ａに当たらない場合には、図７に示すように、ガイド部３４の第１ガイド斜面３４ａ、第２ガイド斜面３４ｂ、第３ガイド斜面３４ｃにガイドされて、押圧面３３ａに向かい、押圧面３３ａから立設された規制壁３３ｂで位置決めされる。押圧面３３ａを囲む壁面の一部には、ノズル検知部材４２の検知部４２ａが突出しているので、給油ノズルＦＮの先端は、検知部４２ａに当たる。これにより、図１０および図１１に示すように、ノズル検知部材４２の検知部４２ａが給油ノズルＦＮの先端で押されると、ロック部材４６がロック位置から非ロック位置へ切り換えられ、つまり、開閉起動機構４０のロック位置が解除され、第１開閉部材３１の開き動作が可能になる。 (3) Opening / Closing Operation of Fuel Tank Opening / Closing Device 10 Next, a fueling operation by the fuel nozzle FN to the fuel tank opening / closing device 10 will be described.
(3) -1 Opening Operation As shown in FIG. 1, when the fueling lid FL is opened, the fuel tank opening / closing device 10 disposed in the fueling chamber FR appears. As shown in FIG. 16, when the oil supply nozzle FN is inserted into the first opening 23a and the tip of the oil supply nozzle FN does not hit the pressing surface 33a of the first opening / closing member 31, as shown in FIG. Guided by the first guide inclined surface 34a, the second guide inclined surface 34b, and the third guide inclined surface 34c of the portion 34, it faces the pressing surface 33a and is positioned by the restriction wall 33b standing from the pressing surface 33a. Since the detection part 42a of the nozzle detection member 42 protrudes from a part of the wall surface surrounding the pressing surface 33a, the tip of the fueling nozzle FN hits the detection part 42a. As a result, as shown in FIGS. 10 and 11, when the detection portion 42a of the nozzle detection member 42 is pushed by the tip of the fuel supply nozzle FN, the lock member 46 is switched from the locked position to the unlocked position, that is, opening and closing is started. The lock position of the mechanism 40 is released, and the first opening / closing member 31 can be opened.

そして、図１７に示すように、給油ノズルＦＮをさらに挿入して、給油ノズルＦＮの先端が第１開閉部材３１の押圧部３３の押圧面３３ａを押圧すると、第１開閉部材３１は、第１軸受部３７のスプリング片３７ｃの付勢力に抗して回動する。このとき、図１７および図１８に示すように、給油ノズルＦＮをさらに押し入れると、給油ノズルＦＮの先端が第２開閉部材５１の摺動面５３ａに当たり、第２開閉部材５１が第２軸部５６を中心に回動する。これにより、給油ノズルＦＮがタンク側通路１１Ｐｂに挿入される。そして、図１９に示すように、給油ノズルＦＮは、位置決め部ＦＮａがノズルラッチ部２３ｃに引っかかってタンク開口形成部材１１に保持され、この状態にて、給油ノズルＦＮからタンク側通路１１Ｐｂに給油する。燃料が燃料タンクの満タン液位を越えてタンク側通路１１Ｐｂ内を燃料が上昇する。そして、燃料が給油ノズルＦＮの先端付近の検知穴ＦＮｂに入ると、給油ノズルＦＮのオートストップが作動して、給油が停止する。   As shown in FIG. 17, when the refueling nozzle FN is further inserted and the tip of the refueling nozzle FN presses the pressing surface 33 a of the pressing portion 33 of the first opening / closing member 31, the first opening / closing member 31 is The bearing member 37 rotates against the biasing force of the spring piece 37c. At this time, as shown in FIGS. 17 and 18, when the oil supply nozzle FN is further pushed in, the tip of the oil supply nozzle FN hits the sliding surface 53a of the second opening / closing member 51, and the second opening / closing member 51 is in the second shaft portion. Rotate around 56. Thereby, the fueling nozzle FN is inserted into the tank side passage 11Pb. Then, as shown in FIG. 19, in the oil supply nozzle FN, the positioning portion FNa is caught by the nozzle latch portion 23c and held by the tank opening forming member 11, and in this state, the oil supply nozzle FN supplies oil to the tank side passage 11Pb. The fuel rises in the tank side passage 11Pb after the fuel tank reaches the full tank level. When the fuel enters the detection hole FNb near the tip of the fuel supply nozzle FN, the auto stop of the fuel supply nozzle FN is activated and the fuel supply is stopped.

（３）−２ 閉じ動作
給油を終えて、給油ノズルＦＮを第２開口２６ａから抜くと、第２フラップバルブ機構５０の第２開閉部材５１がスプリング５９の復元力により回動して第２開口２６ａを閉じ、さらに給油ノズルＦＮが抜かれると、第１フラップバルブ機構３０の第１開閉部材３１が第１軸受部３７のスプリング片３７ｃの復元力により回動して第１開口２３ａを閉じる。なお、図１０および図１１に示すように、ロック部材４６およびノズル検知部材４２は初期位置に戻り、つまり、底蓋３６の位置決め用円弧３６ｂの弾性力で、ロック部材４６のロック係合部４６ｂが被ロック部４８の被ロック部４８ｃに係合するとともに、ノズル検知部材４２が初期位置に戻る。さらに、給油蓋ＦＬ（図１）を閉じる。 (3) -2 Closing Operation When the refueling is finished and the refueling nozzle FN is removed from the second opening 26a, the second opening / closing member 51 of the second flap valve mechanism 50 is rotated by the restoring force of the spring 59, and the second opening When the oil supply nozzle FN is removed, the first opening / closing member 31 of the first flap valve mechanism 30 is rotated by the restoring force of the spring piece 37c of the first bearing portion 37 to close the first opening 23a. As shown in FIGS. 10 and 11, the lock member 46 and the nozzle detection member 42 return to the initial positions, that is, the lock engaging portion 46b of the lock member 46 by the elastic force of the positioning arc 36b of the bottom cover 36. Engages with the locked portion 48c of the locked portion 48, and the nozzle detection member 42 returns to the initial position. Further, the fuel filler lid FL (FIG. 1) is closed.

（４） 燃料タンクの開閉装置１０の作用・効果
上記実施例にかかる燃料タンクの開閉装置１０により、以下の作用効果を奏する。
（４）−１ 開閉起動機構４０は、図７に示すように、給油ノズルＦＮが第１開口２３ａの中心軸ＣＡから距離Ｌｓだけ位置ズレした状態で挿入された場合に、給油ノズルＦＮの先端がガイド部３４に当たり、押圧部３３の壁面で囲まれる規制領域３３Ｓに導かれ、給油ノズルＦＮの先端が検知部４２ａを押して、図１１（Ｂ）に示すロック機構４５の非ロック位置に移行させ、第１フラップバルブ機構３０の第１開閉部材３１を開き動作させることができる。したがって、給油ノズルＦＮが第１開口２３ａの中心軸ＣＡから外れて挿入されても、確実なフラップバルブ機構の開き動作を行なうことができる。 (4) Operation / Effect of Fuel Tank Opening / Closing Device 10 The fuel tank opening / closing device 10 according to the embodiment provides the following operational effects.
(4) -1 As shown in FIG. 7, the opening / closing activation mechanism 40 has the tip of the oil supply nozzle FN when the oil supply nozzle FN is inserted with a distance Ls shifted from the central axis CA of the first opening 23a. Is guided to the regulation region 33S surrounded by the wall surface of the pressing portion 33, and the tip of the fueling nozzle FN pushes the detecting portion 42a to shift to the unlocking position of the locking mechanism 45 shown in FIG. The first opening / closing member 31 of the first flap valve mechanism 30 can be opened. Therefore, even if the fuel supply nozzle FN is inserted away from the central axis CA of the first opening 23a, the flap valve mechanism can be reliably opened.

（４）−２ 図８に示すように、第１開閉部材３１のガイド部３４およびノズル検知部材４２は、給油ノズルＦＮの先端の外径が所定径以下の場合に押圧されるように配置されているので、ガソリン用の給油ノズルＦＮの場合には、第１フラップバルブ機構３０の第１開閉部材３１が開き動作を行うが、軽油用の給油ノズルＦＮの場合には、第１開閉部材３１の開き動作を行わない。すなわち、ガソリン用の給油ノズルＦＮの外径をＤ（Ｇ）とし、規制領域３３Ｓの内径をＤ１とし、軽油用の給油ノズルＦＮ（Ｌ）の外径をＤ（Ｌ）とすると、Ｄ（Ｇ）＜Ｄ１＜Ｄ（Ｌ）である。よって、外径Ｄ（Ｌ）の軽油用の給油ノズルＦＮ（Ｌ）の先端がノズル検知部材４２の検知部４２ａを押そうとしても、ガイド部３４に当たって内径Ｄ１の規制領域３３Ｓに入らず、ノズル検知部材４２の検知部４２ａを押せないから、非ロック位置を解除しない。したがって、給油ノズルＦＮの外径によって燃料の種類が異なる場合に、つまり、給油ノズルＦＮを誤って挿入しても、第１開口２３ａが開かないから、間違った種類の燃料を供給することもない。 (4) -2 As shown in FIG. 8, the guide portion 34 and the nozzle detection member 42 of the first opening / closing member 31 are arranged so as to be pressed when the outer diameter of the tip of the fuel supply nozzle FN is equal to or smaller than a predetermined diameter. Therefore, in the case of the fuel supply nozzle FN for gasoline, the first opening / closing member 31 of the first flap valve mechanism 30 opens, but in the case of the oil supply nozzle FN for light oil, the first opening / closing member 31 is opened. Does not open. That is, if the outer diameter of the gasoline supply nozzle FN is D (G), the inner diameter of the restriction region 33S is D1, and the outer diameter of the light oil supply nozzle FN (L) is D (L), then D (G ) <D1 <D (L). Therefore, even if the tip of the light oil supply nozzle FN (L) for the light oil having the outer diameter D (L) tries to press the detection portion 42a of the nozzle detection member 42, the nozzle does not enter the restriction region 33S of the inner diameter D1 by hitting the guide portion 34. Since the detection part 42a of the detection member 42 cannot be pushed, the unlocked position is not released. Therefore, when the type of fuel differs depending on the outer diameter of the fueling nozzle FN, that is, even if the fueling nozzle FN is mistakenly inserted, the first opening 23a is not opened, so that the wrong type of fuel is not supplied. .

（４）−３ 図７に示すように、押圧部３３の規制壁３３ｂで囲まれた規制領域３３Ｓは、給油ノズルＦＮの外径Ｄ（Ｇ）より僅かに大きい内径Ｄ１であっても、規制壁３３ｂの上部に向けて傾斜したガイド部３４が設けられており、ガイド部３４が給油ノズルＦＮの先端を規制壁３３ｂ内へ導くから、給油ノズルＦＮの挿入作業もスムーズにできる。 (4) -3 As shown in FIG. 7, even if the regulation region 33S surrounded by the regulation wall 33b of the pressing portion 33 has an inner diameter D1 that is slightly larger than the outer diameter D (G) of the fuel supply nozzle FN, The guide part 34 inclined toward the upper part of the wall 33b is provided, and the guide part 34 guides the tip of the fuel supply nozzle FN into the regulation wall 33b, so that the operation of inserting the fuel supply nozzle FN can be performed smoothly.

（４）−４ 押圧部３３の規制壁３３ｂは、一方の側を開放した平坦部３３ｃを有するＵ字形に形成されている。平坦部３３ｃは、第１開閉部材３１の第１軸部３５に対して反対の自由端側に配置されているから、第１開閉部材３１が第１軸部３５を中心に開き動作する際に、給油ノズルＦＮの先端を摺動させる。よって、給油ノズルＦＮの先端が第１開閉部材３１の開き動作の際に、ガイド部３４に引っ掛かることがなく、第１開閉部材３１のスムーズな開き動作を行なうことができる。 (4) -4 The regulating wall 33b of the pressing portion 33 is formed in a U shape having a flat portion 33c with one side open. Since the flat portion 33 c is disposed on the free end side opposite to the first shaft portion 35 of the first opening / closing member 31, the first opening / closing member 31 performs an opening operation around the first shaft portion 35. Then, the tip of the oil supply nozzle FN is slid. Therefore, the tip of the fuel supply nozzle FN is not caught by the guide portion 34 when the first opening / closing member 31 is opened, and the first opening / closing member 31 can be smoothly opened.

（４）−５ ノズル検知部材４２の検知部４２ａは、規制壁３３ｂから突出して配置されているので、給油ノズルＦＮの先端が規制領域３３Ｓに入ったときに、給油ノズルＦＮの先端により確実に押される。また、給油ノズルの特定の外形を選択的に挿入可能である規制領域３３Ｓは、規制壁３３ｂで規制されており、ノズル検知部材４２は、給油ノズルＦＮの外形を検出する機能を与えなくてもよい。よって、規制壁３３ｂに、ノズル検知部材４２を１つだけ配置するだけで、給油ノズルＦＮの種別を確実に検知することができる。 (4) -5 Since the detection part 42a of the nozzle detection member 42 is disposed so as to protrude from the restriction wall 33b, when the tip of the fuel supply nozzle FN enters the restriction region 33S, the tip of the fuel supply nozzle FN is more reliably attached. Pressed. Further, the restriction region 33S in which a specific outer shape of the fueling nozzle can be selectively inserted is restricted by the restriction wall 33b, and the nozzle detection member 42 does not have a function of detecting the outer shape of the fueling nozzle FN. Good. Therefore, the type of the fuel supply nozzle FN can be reliably detected by arranging only one nozzle detection member 42 on the regulation wall 33b.

（４）−６ ガイド部３４は、第１開閉部材３１に設けられており、つまり、大径になり易いタンク開口形成部材１１に設けていないので、タンク開口形成部材１１の外径などを小さくし、構成を簡単にできる。 (4) -6 The guide portion 34 is provided in the first opening / closing member 31, that is, since it is not provided in the tank opening forming member 11 that tends to have a large diameter, the outer diameter of the tank opening forming member 11 is reduced. And the configuration can be simplified.

（４）−７ 図３に示すように、第１フラップバルブ機構３０は、給油時以外にタンク開口形成部材１１の第１開口２３ａを閉じているから、第１開口２３ａ、挿入通路１１Ｐａを通じて第２フラップバルブ機構５０に達する大気中の塵などを防ぎ、第２フラップバルブ機構５０のシール性の低下を防止することができる。 (4) -7 As shown in FIG. 3, since the first flap valve mechanism 30 closes the first opening 23a of the tank opening forming member 11 except during refueling, the first flap valve mechanism 30 passes through the first opening 23a and the insertion passage 11Pa. The dust in the atmosphere reaching the 2 flap valve mechanism 50 can be prevented, and the sealing performance of the second flap valve mechanism 50 can be prevented from being lowered.

（４）−８ 図１６ないし図１８に示すように、第１開閉部材３１が開き動作を行なうときに、第１開閉部材３１の自由端側に設けた摺動端３１ｂが第２開閉部材５１の摺動面５３ａを線接触で摺動することにより摺動面５３ａ上に乗っていた塵などが摺動面５３ａ上から第２軸部５６側へ除去される。つまり、給油ノズルＦＮの先端からの押圧力を受ける箇所であるこの摺動面５３ａから塵などが除去される。よって、第２開閉部材５１の上に乗っていた塵などが、第２開閉部材５１の傾きや、給油ノズルＦＮの先端で第２開閉部材５１に付着している塵などが剥ぎ取られることに起因して、燃料タンク側の燃料通路１１Ｐへ落下することがなく、燃料通路１１Ｐに接続される燃料タンクに入るのを防止することができる。 (4) -8 As shown in FIGS. 16 to 18, when the first opening / closing member 31 opens, the sliding end 31 b provided on the free end side of the first opening / closing member 31 serves as the second opening / closing member 51. By sliding the sliding surface 53a in line contact, dust or the like that has been on the sliding surface 53a is removed from the sliding surface 53a to the second shaft portion 56 side. That is, dust and the like are removed from the sliding surface 53a, which is a portion that receives a pressing force from the tip of the fuel supply nozzle FN. Therefore, dust or the like riding on the second opening / closing member 51 is peeled off from the inclination of the second opening / closing member 51 or dust attached to the second opening / closing member 51 at the tip of the fuel supply nozzle FN. As a result, the fuel tank does not fall into the fuel passage 11P on the fuel tank side, and can be prevented from entering the fuel tank connected to the fuel passage 11P.

（４）−９ 図１７および図１８に示すように、第２開閉部材５１が第１開閉部材３１の摺動端３１ｂで押され、給油ノズルＦＮの先端で第２開閉部材５１を直接押す力を低減するから、摺動面５３ａを損傷することが少なく、また第２開閉部材５１の開き動作をスムーズに行なうことができる。 (4) -9 As shown in FIGS. 17 and 18, the second opening and closing member 51 is pushed by the sliding end 31 b of the first opening and closing member 31, and the second opening and closing member 51 is directly pushed by the tip of the fuel supply nozzle FN. Therefore, the sliding surface 53a is hardly damaged, and the opening operation of the second opening / closing member 51 can be performed smoothly.

（４）−１０ 図１９に示すように、タンク開口形成部材１１は、第１開口形成部材２２が中心軸ＣＡと直角な面に対して第１角度θ１を傾けて配置され、また、第２開口形成部材２６が中心軸ＣＡと直角な面に対して第２角度θ２を傾けて配置されるとともに、第１開口形成部材２２および第２開口形成部材２６が第１軸部３５および上記第２軸部５６側から、中心軸ＣＡに対して燃料通路１１Ｐの反対側に向けて狭くなるように配置されている。このような構成により、給油ノズルＦＮを燃料通路１１Ｐに挿入して、位置決め部ＦＮａをノズルラッチ部２３ｃに位置決めして給油している状態にて、ノズルラッチ部２３ｃは、第２開口２６ａの自由端側との距離Ｌ２が第１軸部３５と第２軸部５６との距離Ｌ１より短くなり、給油ノズルＦＮの先端を、第２開口２６ａを通じて燃料通路１１Ｐの奥（燃料タンク側）まで距離Ｌ３で挿入することができる。よって、給油ノズルＦＮの検知穴ＦＮｂが給油ノズルＦＮの先端付近に上昇した燃料通路１１Ｐ内の燃料液位を検出することで、給油をオートストップさせる場合において、給油ノズルＦＮの検知穴ＦＮｂから第２開口２６ａまでの距離を長くとることができ、第２開口２６ａの近くまで液面が上昇する前に、オートストップを作動させることができ、第２開口２６ａから燃料が溢れることを防止することができる。また、給油ノズルＦＮは、第２開口２６ａの奥まで挿入できるから、燃料通路１１Ｐの第２開口２６ａの付近の燃料の飛沫によって、誤ったオートストップを生じることを防止でき、スムーズな給油作業を行なうことができる。
ここで、上記第１角度θ１および第２角度θ２としては、第１フラップバルブ機構３０の第１開閉部材３１の開閉動作に支障のない距離Ｌ１や、距離Ｌ３などのパラメータを考慮して、５≦θ１，θ２≦３０゜であることが好ましい。 (4) -10 As shown in FIG. 19, the tank opening forming member 11 is arranged such that the first opening forming member 22 is inclined at the first angle θ1 with respect to the plane perpendicular to the central axis CA, The opening forming member 26 is disposed with a second angle θ2 inclined with respect to a plane perpendicular to the central axis CA, and the first opening forming member 22 and the second opening forming member 26 include the first shaft portion 35 and the second shaft. It arrange | positions so that it may become narrow toward the opposite side of the fuel path 11P with respect to the center axis | shaft CA from the axial part 56 side. With such a configuration, in a state where the fuel filler nozzle FN is inserted into the fuel passage 11P and the positioning portion FNa is positioned and fueled in the nozzle latch portion 23c, the nozzle latch portion 23c is located on the free end side of the second opening 26a. Is shorter than the distance L1 between the first shaft portion 35 and the second shaft portion 56, and the tip of the fuel supply nozzle FN is moved to the back of the fuel passage 11P (the fuel tank side) through the second opening 26a at a distance L3. Can be inserted. Therefore, the detection hole FNb of the fuel supply nozzle FN detects the fuel level in the fuel passage 11P that has risen near the tip of the fuel supply nozzle FN, so that when the fuel supply is automatically stopped, the second through the detection hole FNb of the fuel supply nozzle FN. The distance to the opening 26a can be increased, the automatic stop can be activated before the liquid level rises to the vicinity of the second opening 26a, and the overflow of fuel from the second opening 26a can be prevented. . In addition, since the fuel supply nozzle FN can be inserted to the back of the second opening 26a, it is possible to prevent an erroneous auto-stop from being caused by the splash of fuel in the vicinity of the second opening 26a of the fuel passage 11P, thereby performing a smooth fuel supply operation. be able to.
Here, the first angle θ1 and the second angle θ2 are 5 in consideration of parameters such as the distance L1 and the distance L3 that do not hinder the opening / closing operation of the first opening / closing member 31 of the first flap valve mechanism 30. ≦ θ1, θ2 ≦ 30 ° is preferable.

（４）−１１ 図１９に示すように、第１開口形成部材２２および第２開口形成部材２６において、第１軸部３５と第２軸部５６との距離Ｌ１は、大きくとることができるので、第１開閉部材３１の先端が第２開閉部材５１に干渉するなどの第１開閉部材３１の開閉動作に支障がない。 (4) -11 As shown in FIG. 19, in the first opening forming member 22 and the second opening forming member 26, the distance L1 between the first shaft portion 35 and the second shaft portion 56 can be made large. There is no hindrance to the opening / closing operation of the first opening / closing member 31 such that the tip of the first opening / closing member 31 interferes with the second opening / closing member 51.

（４）−１２ 図１３（Ａ）に示すように、第２開閉部材５１の上面部５３は、第２開口２６ａを貫通して、第２開口形成部材２６の上面より第１開口２３ａ側へ突出しているので、第１開閉部材３１の自由端３１ａが第２開口形成部材２６の開口周縁部に当たることもなく、第１開閉部材３１のスムーズな開閉動作を行なうことができる。 (4) -12 As shown in FIG. 13A, the upper surface portion 53 of the second opening / closing member 51 penetrates through the second opening 26a to the first opening 23a side from the upper surface of the second opening forming member 26. Since it protrudes, the free end 31a of the first opening / closing member 31 does not hit the peripheral edge of the opening of the second opening forming member 26, and the first opening / closing member 31 can be smoothly opened and closed.

（４）−１３ 図１４に示すように、カバー部材２０の側壁部２１と挿入通路形成部材２７などに囲まれた挿入通路１１Ｐａは、外気通気路１１Ｐｃにより、外部との通気が確保され、内圧が調整される。また、外気通気路１１Ｐｃは、挿入通路形成部材２７と外気通路形成部材２１ｃとが所定間隙Ｌｐで配置され、しかも、挿入通路１１Ｐａに通じる通気孔２７ｂが外気通路形成部材２１ｃに対向して配置され、屈曲した通路となっている。よって、外部からの塵などが外気通気路１１Ｐｃで除去され、挿入通路１１Ｐａに達するのを防止することができる。 (4) -13 As shown in FIG. 14, the insertion passage 11Pa surrounded by the side wall portion 21 of the cover member 20 and the insertion passage forming member 27 is secured to the outside by the outside air passage 11Pc, and the internal pressure Is adjusted. Further, in the outside air passage 11Pc, the insertion passage forming member 27 and the outside air passage forming member 21c are arranged with a predetermined gap Lp, and the ventilation hole 27b leading to the insertion passage 11Pa is arranged opposite to the outside air passage forming member 21c. It is a bent passage. Therefore, it is possible to prevent dust from the outside from being removed by the outside air passage 11Pc and reaching the insertion passage 11Pa.

（４）−１４ 外気通路形成部材２１ｃは、第１開口形成部材２２の外縁から一体に形成された側壁部２１により構成されるカバー部材２０の一部を構成しているから、外気通路形成部材２１ｃを設けるのに、部品点数を増加させることもない。 (4) -14 Since the outside air passage forming member 21c constitutes a part of the cover member 20 constituted by the side wall portion 21 integrally formed from the outer edge of the first opening forming member 22, the outside air passage forming member The provision of 21c does not increase the number of parts.

（４）−１５ 挿入通路形成部材２７は、第１開口２３ａから第２開口２６ａに向けて上記挿入通路１１Ｐａの通路面積を狭くするように傾斜した傾斜壁２８ａを有しているので、第２開口２６ａ側から挿入通路１１Ｐａに溢れた燃料は、傾斜壁２８ａに沿って速やかに戻すことができる。 (4) -15 The insertion passage forming member 27 has the inclined wall 28a inclined so as to narrow the passage area of the insertion passage 11Pa from the first opening 23a toward the second opening 26a. The fuel overflowing from the opening 26a side into the insertion passage 11Pa can be quickly returned along the inclined wall 28a.

（４）−１６ 図４に示すように、挿入通路形成部材２７は、筒状に形成された通路形成本体２８と、該通路形成本体２８の肉厚を部分的に薄くした脆弱部位２７ａとを有し、該脆弱部位２７ａは、上記通路形成本体２８の周方向に沿って形成されている。よって、通路形成部材２４は、所定以上の外力を受けたときに、脆弱部位２７ａにて、第２開口形成部材２６が破断する前に破断する。よって、第２開口形成部材２６の周辺部が破断し難く、ガスケットＧＳによる第２開口２６ａによるシール性を損なうことがない。 (4) -16 As shown in FIG. 4, the insertion passage forming member 27 includes a passage-forming body 28 formed in a cylindrical shape, and a fragile portion 27 a in which the thickness of the passage-forming body 28 is partially reduced. The fragile portion 27 a is formed along the circumferential direction of the passage forming body 28. Therefore, the passage forming member 24 breaks before the second opening forming member 26 breaks at the fragile portion 27a when receiving an external force of a predetermined value or more. Therefore, the peripheral portion of the second opening forming member 26 is not easily broken, and the sealing performance by the second opening 26a by the gasket GS is not impaired.

（４）−１７ 図１４および図１５に示すように、挿入通路形成部材２７は、第１開口２３ａと第２開口２６ａとを接続する挿入通路１１Ｐａを形成するとともに、給油ノズルＦＮを第１開口２３ａから第２開口２６ａへガイドし、給油作業を容易にする。また、挿入通路形成部材２７によって形成される挿入通路１１Ｐａは、外部に対してシール部材２９でシールされている。すなわち、シール部材２９は、シール本体２９ａと、該シール本体２９ａと一体に形成され第１開口２３ａの開口周縁と第１開閉部材３１のシール面３２ｅと間をシールする第１シール部２９ｃと、シール本体２９ａと一体に形成されかつ該第１シール部２９ｃの外側を囲むように配置され第１開口形成部材２２と挿入通路形成部材２７の端部との間をシールする第２シール部２９ｄと、を有している。このようなシール部材２９は、第１シール部２９ｃと、第２シール部２９ｄとが一体で形成されているので、部品点数が少なく、また、組付も簡単である。 (4) -17 As shown in FIGS. 14 and 15, the insertion passage forming member 27 forms the insertion passage 11Pa that connects the first opening 23a and the second opening 26a, and also opens the fuel supply nozzle FN to the first opening. It guides from 23a to the 2nd opening 26a, and makes oiling work easy. Further, the insertion path 11Pa formed by the insertion path forming member 27 is sealed to the outside by a seal member 29. That is, the seal member 29 includes a seal body 29a, a first seal portion 29c that is integrally formed with the seal body 29a and seals between the opening periphery of the first opening 23a and the seal surface 32e of the first opening / closing member 31; A second seal portion 29d that is formed integrally with the seal body 29a and is disposed so as to surround the outside of the first seal portion 29c and seals between the first opening forming member 22 and the end portion of the insertion passage forming member 27; ,have. In such a seal member 29, the first seal portion 29c and the second seal portion 29d are integrally formed, so that the number of parts is small and the assembly is easy.

Ｂ．第２実施例
図２０は本発明の第２実施例にかかる燃料タンクの開閉装置１０Ｂを一部破断した斜視図である。本実施例は、タンク開口形成部材１１Ｂを構成する挿入通路形成部材２７Ｂおよびシール部材２９Ｂの構成に特徴を有する。すなわち、挿入通路形成部材２７Ｂは、第１軸部３５Ｂの両側に、屈曲壁２７Ｂｃから形成された凹所２７Ｂｄが図示の上下方向に沿って形成されている。凹所２７Ｂｄは、カバー部材２０Ｂを構成する外気通路形成部材２１Ｂｃとともに外気通気路１１Ｐｃ−Ｂの一部の通路を形成している。また、屈曲壁２７Ｂｃの上部には、挿入通路１１Ｐａ−Ｂと外気通気路１１Ｐｃ−Ｂとを接続する通気孔２７Ｂｂが形成されている。このような外気通気路１１Ｐｃ−Ｂは、挿入通路形成部材２７Ｂの外周や、通気孔２７Ｂｂで迂回した迷路となっているので、一層、塵などの除去作用が大きい。 B. Second Embodiment FIG. 20 is a partially cutaway perspective view of a fuel tank opening / closing device 10B according to a second embodiment of the present invention. This embodiment is characterized by the configuration of the insertion passage forming member 27B and the seal member 29B that constitute the tank opening forming member 11B. That is, in the insertion passage forming member 27B, recesses 27Bd formed from the bent walls 27Bc are formed along the vertical direction in the drawing on both sides of the first shaft portion 35B. The recess 27Bd forms a part of the outside air passage 11Pc-B together with the outside air passage forming member 21Bc constituting the cover member 20B. In addition, a ventilation hole 27Bb that connects the insertion passage 11Pa-B and the outside air passage 11Pc-B is formed in the upper part of the bent wall 27Bc. Such an outside air passage 11Pc-B is a labyrinth circumvented by the outer periphery of the insertion passage forming member 27B and the vent hole 27Bb, and therefore has a greater effect of removing dust and the like.

図２１は通路形成部材２４Ｂを示す斜視図、図２２はシール部材２９Ｂを下方から見た斜視図である。図２２において、シール部材２９Ｂは、外径の異なる半円筒を結合した形状であって、図２１の挿入通路形成部材２７Ｂの上縁部と同じ形状であり、挿入通路形成部材２７Ｂと第１開口形成部材２２Ｂ（図２０）との間に介在している。図２２に示すように、シール部材２９Ｂは、第１シール部２９Ｂｃと、第２シール部２９Ｂｄとを一体に形成した形状であれば、各種の形状をとることができる。   21 is a perspective view showing the passage forming member 24B, and FIG. 22 is a perspective view of the seal member 29B as viewed from below. In FIG. 22, the seal member 29B has a shape obtained by combining semi-cylinders having different outer diameters, and has the same shape as the upper edge portion of the insertion path forming member 27B in FIG. It is interposed between the forming member 22B (FIG. 20). As shown in FIG. 22, the seal member 29B can take various shapes as long as the first seal portion 29Bc and the second seal portion 29Bd are integrally formed.

なお、この発明は上記実施例に限られるものではなく、その要旨を逸脱しない範囲において種々の態様において実施することが可能である。   The present invention is not limited to the above-described embodiments, and can be implemented in various modes without departing from the scope of the invention.

上記実施例では、図１３（Ｂ）に示すように、第２開閉部材５１の摺動面５３ａは、第２開閉部材５１の中心から第１方向Ｘに向かうにつれて第２方向Ｙにおける面積が小さくなる湾曲面で形成したが、これに限らず、摺動面は、第１開閉部材３１の摺動端３１ｂが線接触で摺動する形状であれば、直線であってもよい。また、第２開閉部材の形状としては、矩形であってもよく、その矩形で形成された上面部に湾曲した摺動面を形成してもよい。   In the above embodiment, as shown in FIG. 13B, the sliding surface 53a of the second opening / closing member 51 has a smaller area in the second direction Y from the center of the second opening / closing member 51 toward the first direction X. However, the present invention is not limited to this, and the sliding surface may be a straight line as long as the sliding end 31b of the first opening / closing member 31 slides in line contact. Further, the shape of the second opening / closing member may be a rectangle, and a curved sliding surface may be formed on the upper surface portion formed by the rectangle.

１０…燃料タンクの開閉装置
１０Ｂ…燃料タンクの開閉装置
１１…タンク開口形成部材
１１Ｂ…タンク開口形成部材
１１Ｐ…燃料通路
１１Ｐａ…挿入通路
１１Ｐａ−Ｂ…挿入通路
１１Ｐｂ…タンク側通路
１１Ｐｃ…外気通気路
１１Ｐｃ−Ｂ…外気通気路
１１Ｐｃ１…間隙通路
１１Ｐｃ２…環状通路
１１Ｐｃ３…間隙通路
１１Ｓ…弁間室
１２…パイプ本体
１３…円筒部
１３ａ…第１接続部
１３ｂ…第２接続部
１３ｃ，１３ｄ…ファーツリ
１３ｅ…係合突部
１３ｆ…上端部
２０…カバー部材
２０Ｂ…カバー部材
２１…側壁部
２１ａ…側壁本体
２１ｂ…係合爪
２１ｃ…外気通路形成部材
２１Ｂｃ…外気通路形成部材
２２…第１開口形成部材
２２Ｂ…第１開口形成部材
２３…開口部
２３ａ…第１開口
２３ｂ…軸支持部
２３ｃ…ノズルラッチ部
２３ｄ…開口周縁部
２４…通路形成部材
２４Ｂ…通路形成部材
２５…台座部
２５ａ…台座本体
２５ｂ…溶着固定部
２６…第２開口形成部材
２６ａ…第２開口
２６ｂ…シール段部
２７…挿入通路形成部材
２７Ｂ…挿入通路形成部材
２７ａ…脆弱部位
２７ｂ…通気孔
２７Ｂｂ…通気孔
２７Ｂｃ…屈曲壁
２７Ｂｄ…凹所
２８…通路形成本体
２８ａ…傾斜壁
２８ｂ…接続半筒体
２９…シール部材
２９Ｂ…シール部材
２９ａ…シール本体
２９ｂ…開口
２９ｃ…第１シール部
２９ｄ…第２シール部
２９ｅ…装着用開口
２９Ｂｃ…第１シール部
２９Ｂｄ…第２シール部
３０…第１フラップバルブ機構
３１…第１開閉部材
３１Ｓ…収納室
３１ａ…自由端
３１ｂ…摺動端
３２…押圧部材
３２ｂ…嵌合円弧部
３２ｃ…装着孔
３２ｄ…軸支部
３２ｅ…シール面
３３…押圧部
３３Ｓ…規制領域
３３ａ…押圧面
３３ｂ…規制壁
３３ｃ…平坦部
３４…ガイド部
３４ａ…第１ガイド斜面
３４ｂ…第２ガイド斜面
３４ｃ…第３ガイド斜面
３５…第１軸部
３５Ｂ…第１軸部
３５ａ…軸基部
３５ｂ…軸体
３６…底蓋
３６ａ…蓋本体
３６ｂ…位置決め用円弧
３６ｃ…凹所
３６ｄ…支持突出片
３６ｅ…軸支部
３７…第１軸受部
３７ａ…支持基部
３７ｂ…軸受孔
３７ｃ…スプリング片
４０…開閉起動機構
４２…ノズル検知部材
４２ａ…検知部
４２ｂ…連結部
４２ｃ…軸部
４２ｄ…連結ピン
４５…ロック機構
４６…ロック部材
４６ａ…ロック本体
４６ｂ…ロック係合部
４６ｃ…ピン連結部
４６ｄ…連結溝
４６ｅ…スプリング片
４８…被ロック部
４８ａ…被ロック本体
４８ｂ…挿入孔
４８ｃ…被ロック部
４８ｄ…係脱穴
５０…第２フラップバルブ機構
５１…第２開閉部材
５１Ｓ…弁室
５１ａ…自由端
５２…押圧部材
５３…上面部
５３ａ…摺動面
５３ｂ…段部
５４…側壁部
５５…弁室形成部材
５５ｂ…フランジ
５６…第２軸部
５８…第２軸受部
５８ａ…支持本体
５８ｂ…軸支孔
５９…スプリング
６０…調圧弁
６１…正圧弁
６１ａ…スプリング
６１ｂ…正圧弁体
６２…負圧弁
６２ａ…スプリング
６２ｂ…負圧弁体
ＢＰ…基板
ＣＡ…中心軸
ＦＬ…給油蓋
ＦＬａ…蓋本体
ＦＬｂ…ヒンジ
ＦＮ…給油ノズル
ＦＮａ…位置決め部
ＦＮｂ…検知穴
ＦＲ…給油室
ＧＳ…ガスケット
Ｌａ…距離
Ｐ１…燃料パイプ
Ｐ２…ブリーザパイプ DESCRIPTION OF SYMBOLS 10 ... Fuel tank opening / closing device 10B ... Fuel tank opening / closing device 11 ... Tank opening forming member 11B ... Tank opening forming member 11P ... Fuel passage 11Pa ... Insertion passage 11Pa-B ... Insertion passage 11Pb ... Tank side passage 11Pc ... Outside air vent passage 11Pc-B ... Outside air passage 11Pc1 ... Gap passage 11Pc2 ... Annular passage 11Pc3 ... Gap passage 11S ... Valve chamber 12 ... Pipe body 13 ... Cylindrical portion 13a ... First connection portion 13b ... Second connection portion 13c, 13d ... Furtree 13e ... engagement protrusion 13f ... upper end 20 ... cover member 20B ... cover member 21 ... side wall 21a ... side wall main body 21b ... engagement claw 21c ... outside air passage forming member 21Bc ... outside air passage forming member 22 ... first opening forming member 22B ... 1st opening formation member 23 ... Opening part 23a ... 1st opening 23b ... Shaft support part 23c ... Slurry latch portion 23d ... periphery peripheral portion 24 ... passage forming member 24B ... passage forming member 25 ... pedestal portion 25a ... pedestal body 25b ... welding fixing portion 26 ... second opening forming member 26a ... second opening 26b ... seal step portion 27 ... insertion Path forming member 27B ... Insertion path forming member 27a ... Fragile portion 27b ... Vent hole 27Bb ... Vent hole 27Bc ... Bent wall 27Bd ... Recessed 28 ... Path forming body 28a ... Inclined wall 28b ... Connection half cylinder 29 ... Sealing member 29B ... Seal member 29a ... Seal body 29b ... Opening 29c ... First seal part 29d ... Second seal part 29e ... Mounting opening 29Bc ... First seal part 29Bd ... Second seal part 30 ... First flap valve mechanism 31 ... First opening / closing Member 31S ... Storage chamber 31a ... Free end 31b ... Sliding end 32 ... Pressing member 32b ... Fitting arc portion 32c ... Installation 32d ... Shaft support portion 32e ... Sealing surface 33 ... Pressing portion 33S ... Restriction region 33a ... Pressing surface 33b ... Restriction wall 33c ... Flat portion 34 ... Guide portion 34a ... First guide slope 34b ... Second guide slope 34c ... Third guide slope 35 ... 1st shaft part 35B ... 1st shaft part 35a ... Shaft base part 35b ... Shaft body 36 ... Bottom cover 36a ... Cover body 36b ... Arc for positioning 36c ... Recess 36d ... Supporting protrusion piece 36e ... Shaft support part 37 ... 1st Bearing portion 37a ... Support base portion 37b ... Bearing hole 37c ... Spring piece 40 ... Opening / closing activation mechanism 42 ... Nozzle detecting member 42a ... Detecting portion 42b ... Connecting portion 42c ... Shaft portion 42d ... Connecting pin 45 ... Locking mechanism 46 ... Locking member 46a ... Lock body 46b ... Lock engaging portion 46c ... Pin connecting portion 46d ... Connecting groove 46e ... Spring piece 48 ... Locked portion 48a ... Locked portion Main body 48b ... Insertion hole 48c ... Locked part 48d ... Engagement / removal hole 50 ... Second flap valve mechanism 51 ... Second opening / closing member 51S ... Valve chamber 51a ... Free end 52 ... Pressing member 53 ... Upper surface part 53a ... Sliding surface 53b ... Step part 54 ... Side wall part 55 ... Valve chamber forming member 55b ... Flange 56 ... Second shaft part 58 ... Second bearing part 58a ... Support body 58b ... Shaft support hole 59 ... Spring 60 ... Pressure control valve 61 ... Positive pressure valve 61a ... Spring 61b ... Positive pressure valve body 62 ... Negative pressure valve 62a ... Spring 62b ... Negative pressure valve body BP ... Substrate CA ... Center axis FL ... Filler lid FLa ... Lid body FLb ... Hinge FN ... Filler nozzle FNa ... Positioning part FNb ... Detection hole FR ... Refueling chamber GS ... Gasket La ... Distance P1 ... Fuel pipe P2 ... Breaser pipe

Claims (4)

給油ノズルから吐出される燃料を燃料タンクへ供給する燃料通路（１１Ｐ）を開閉する燃料タンクの開閉装置において、
上記燃料通路（１１Ｐ）と、該燃料通路（１１Ｐ）に配置され第１開口（２３ａ）を有する第１開口形成部材（２２）と、上記燃料通路（１１Ｐ）内でありかつ上記燃料タンク側に配置され第２開口（２６ａ）を有する第２開口形成部材（２６）と、該第２開口形成部材（２６）よりも上記燃料タンク側に配置される円筒状のパイプ本体部（１２）とを有するタンク開口形成部材（１１）と、
上記第１開口（２３ａ）を開閉する第１開閉部材（３１）を有する第１フラップバルブ機構（３０）と、
上記第２開口（２６ａ）を開閉する第２開閉部材（５１）と、上記第２開口（２６ａ）と第２開閉部材（５１）とをシールするガスケット（ＧＳ）とを有する第２フラップバルブ機構（５０）と、
を備え、
上記タンク開口形成部材（１１）は、
上記第１開口（２３ａ）と上記第２開口（２６ａ）とを接続する挿入通路（１１Ｐａ）を形成するとともに、上記給油ノズル（ＦＮ）を上記第１開口（２３ａ）から上記第２開口（２６ａ）へガイドするための通路形成本体（２８）と、該通路形成本体（２８）の上記第１開口（２３ａ）側に形成された通気孔（２７ｂ）とを有する挿入通路形成部材（２７）と、
上記挿入通路形成部材（２７）の外周側に該挿入通路形成部材（２７）と所定間隙（Ｌｐ）を有しかつ上記通気孔（２７ｂ）に対向して配置された外気通路形成部材（２１ｃ）と、
上記所定間隙（Ｌｐ）と上記通気孔（２７ｂ）とを通じて、上記挿入通路（１１Ｐａ）と外部とを接続する外気通気路（１１Ｐｃ）と、
上記第２開口形成部材（２６）と上記パイプ本体部（１２）とを接続する台座部（２５）と、
上記第１開口形成部材（２２）の外縁から該第１開口形成部材（２２）と一体に筒状に形成され、上記挿入通路形成部材（２７）の外周部を覆う側壁部（２１）を有するカバー部材（２０）と
を備え、
上記パイプ本体部（１２）は、上記第２開口形成部材（２６）と上記パイプ本体部（１２）と上記台座部（２５）とによってタンク側通路（１１Ｐｂ）を形成し、
上記側壁部（２１）に、上記外気通路形成部材（２１ｃ）が形成され、
上記外気通気路（１１Ｐｃ）は、
上記側壁部（２１）の内周側と上記パイプ本体部（１２）の外周側とによって形成される間隙通路（１１Ｐｃ１）と、
上記側壁部（２１）の内周側と、上記台座部（２５）の外周側と、上記通路形成本体（２８）の一部であり、上記第２開口形成部材（２６）に接続している傾斜壁（２８ａ）の外周側と、によって上記燃料通路（１１Ｐ）に対して環状に形成される環状通路（１１Ｐｃ２）と、
上記側壁部（２１）の内周側と、上記第１開口形成部材（２２）と上記傾斜壁（２８ａ）とを接続する接続半筒体（２８ｂ）の外周側と、によって形成される間隙通路（１１Ｐｃ３）と
が接続されることによって形成されている燃料タンクの開閉装置。 In the fuel tank opening and closing device for opening and closing the fuel passage (11P) for supplying the fuel discharged from the fuel nozzle to the fuel tank,
The fuel passage (11P), a first opening forming member (22) having a first opening (23a) disposed in the fuel passage (11P), the fuel passage (11P) and the fuel tank side and placed second opening second opening forming member having the (26a) (26), a cylindrical pipe body arranged on the fuel tank side of the second opening member (26) and (12) A tank opening forming member (11) having:
A first flap valve mechanism (30) having a first opening / closing member (31) for opening and closing the first opening (23a);
A second flap valve mechanism having a second opening / closing member (51) for opening and closing the second opening (26a) and a gasket (GS) for sealing the second opening (26a) and the second opening / closing member (51). (50),
With
The tank opening forming member (11)
An insertion passage (11Pa) that connects the first opening (23a) and the second opening (26a) is formed, and the oil supply nozzle (FN) is moved from the first opening (23a) to the second opening (26a). And an insertion passage forming member (27) having a passage forming body (28) for guiding to the first opening (23a) of the passage forming body (28). ,
The insertion path forming member (27) said insertion path forming member (27) and at a constant gap (Lp) and the vent hole is disposed opposite to (27b) outside air passage forming member on the outer peripheral side of (21c )When,
An outside air passage (11Pc) connecting the insertion passage (11Pa) and the outside through the predetermined gap (Lp) and the vent hole (27b) ;
A pedestal (25) connecting the second opening forming member (26) and the pipe body (12);
The first opening forming member (22) has a side wall portion (21) which is formed in a cylindrical shape integrally with the first opening forming member (22) from the outer edge and covers the outer peripheral portion of the insertion path forming member (27). A cover member (20) ,
The pipe body part (12) forms a tank side passage (11Pb) by the second opening forming member (26), the pipe body part (12), and the pedestal part (25),
The outside air passage forming member (21c) is formed on the side wall (21),
The outside air passage (11Pc)
A gap passage (11Pc1) formed by the inner peripheral side of the side wall (21) and the outer peripheral side of the pipe body (12);
The inner peripheral side of the side wall portion (21), the outer peripheral side of the pedestal portion (25), and a part of the passage forming body (28), are connected to the second opening forming member (26). An annular passage (11Pc2) formed annularly with respect to the fuel passage (11P) by the outer peripheral side of the inclined wall (28a);
A gap passage formed by the inner peripheral side of the side wall (21) and the outer peripheral side of the connection half cylinder (28b) connecting the first opening forming member (22) and the inclined wall (28a). (11Pc3) and
A fuel tank opening and closing device formed by connecting . 請求項１に記載の燃料タンクの開閉装置において、
上記傾斜壁（２８ａ）は、上記第１開口（２３ａ）から上記第２開口（２６ａ）に向けて上記挿入通路（１１Ｐａ）の通路面積を狭くするように傾斜した形状に形成され、上記挿入通路形成部材（２７）に含まれる燃料タンクの開閉装置。 The fuel tank opening and closing device according to claim 1 ,
The inclined wall (28a) is formed in a shape inclined so as to narrow the passage area of the insertion passage (11Pa) from the first opening (23a) toward the second opening (26a), and the insertion passage the fuel tank opening and closing device that is part of the forming member (27). 請求項１または請求項２に記載の燃料タンクの開閉装置において、
上記挿入通路形成部材（２７）は、筒状に形成された通路形成本体（２８）と、該通路形成本体（２８）の肉厚を部分的に薄くした脆弱部位（２７ａ）とを有し、該脆弱部位（２７ａ）は、上記通路形成本体（２８）の周方向に沿って形成されている燃料タンクの開閉装置。 The fuel tank opening and closing device according to claim 1 or 2 ,
The insertion passage forming member (27) has a passage-forming body (28) formed in a cylindrical shape, and a fragile portion (27a) in which the thickness of the passage-forming body (28) is partially reduced, The fragile portion (27a) is a fuel tank opening and closing device formed along the circumferential direction of the passage forming body (28). 請求項１から請求項３までのいずれか一項に記載の燃料タンクの開閉装置において、  The fuel tank opening and closing device according to any one of claims 1 to 3,
上記台座部（２５）は、上記パイプ本体部（１２）の軸と平行な軸を中心とする円筒状の形状と、該円筒状の形状における上記第２開口形成部材（２６）に接続側において、上記パイプ本体部（１２）の軸と直角の面に対して傾斜した蓋部と、を有する燃料タンクの開閉装置。  The pedestal portion (25) has a cylindrical shape centered on an axis parallel to the axis of the pipe body portion (12), and the second opening forming member (26) in the cylindrical shape on the connection side. A fuel tank opening and closing device comprising: a lid portion inclined with respect to a plane perpendicular to the axis of the pipe main body portion (12).

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