JP2010265998A

JP2010265998A - Fuel filling check valve

Info

Publication number: JP2010265998A
Application number: JP2009118235A
Authority: JP
Inventors: Takaaki Ichikawa; 貴昭市川; Yasuharu Nakayama; 康治中山; Kiyotaka Kasugai; 清隆春日井
Original assignee: Pacific Industrial Co Ltd; Taiheiyo Kogyo KK
Current assignee: Pacific Industrial Co Ltd; Taiheiyo Kogyo KK
Priority date: 2009-05-15
Filing date: 2009-05-15
Publication date: 2010-11-25

Abstract

PROBLEM TO BE SOLVED: To provide a fuel receptor valve having lower manufacturing cost than conventional one. SOLUTION: The fuel receptor valve 10 includes first and second valve base structural components 20, 30 constituting a valve base 11, the first valve base structural component 30 having all consistently fuel pressure receiving face of the base valve 11 for consistently receiving the inner pressure of a fuel tank 96, the second valve base structural component 20 having no consistently fuel pressure receiving face. Thus, the first valve base structural component 30 is only formed of highly brittleness resistant metal, and the second valve base structural component 20 is formed of normal metal. Namely, the second valve base structural component 20 can be formed of the normal metal without the need to conventionally use the highly brittleness resistant metal, thus reducing the manufacturing cost of the fuel filling check valve 10. COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、燃料電池用の燃料タンクの燃料注入口に固定され、燃料タンク内に向けた高圧流体燃料の注入を許容し、その逆流を規制する燃料注入用チェックバルブに関する。 The present invention relates to a fuel injection check valve that is fixed to a fuel injection port of a fuel tank for a fuel cell, permits injection of high-pressure fluid fuel into the fuel tank, and restricts backflow thereof.

従来、この種の燃料注入用チェックバルブとして、ガソリン車の給油口に相当する燃料電池搭載車両の燃料注入口に固定されるものが知られている。その一例として図７に示した従来の燃料注入用チェックバルブは、バルブベース３が第１と第２のバルブベース構成部品１，２を結合してなる。その第２バルブベース構成部品２には、燃料供給スタンドの燃料供給プラグ９が接続されるレセプタクル突部２Ａが備えられている。一方、第１のバルブベース構成部品１には、車両の燃料タンクにおける燃料注入口に固定されるタンク側接部１Ａが備えられている。そして、第２バルブベース構成部品２の内部に、フィルタ部材４、弁座部材５が嵌合される一方、第１バルブベース構成部品２の内部に逆止弁機構６が内蔵された状態で、第１と第２のバルブベース構成部品１，２が結合されている（例えば、特許文献１参照）。 Conventionally, as this type of fuel injection check valve, one that is fixed to a fuel injection port of a vehicle equipped with a fuel cell corresponding to a fuel supply port of a gasoline vehicle is known. As an example, the conventional fuel injection check valve shown in FIG. 7 has a valve base 3 formed by connecting first and second valve base components 1 and 2. The second valve base component 2 is provided with a receptacle protrusion 2A to which a fuel supply plug 9 of a fuel supply stand is connected. On the other hand, the first valve base component 1 is provided with a tank side contact portion 1A that is fixed to a fuel inlet in a fuel tank of a vehicle. And while the filter member 4 and the valve seat member 5 are fitted inside the second valve base component 2, while the check valve mechanism 6 is built inside the first valve base component 2, The 1st and 2nd valve base components 1 and 2 are couple | bonded (for example, refer patent document 1).

特開２００８−２３２３６１号公報（段落［０００２］、図１参照）JP 2008-232361 A (see paragraph [0002], FIG. 1)

ところで、水素に代表される高圧流体燃料に金属が常時晒されると、脆性が問題となる。また、高圧流体燃料に対する耐脆性が比較的高い高耐脆性金属は、通常の金属に比べて高価である。 By the way, when a metal is always exposed to a high-pressure fluid fuel typified by hydrogen, brittleness becomes a problem. In addition, a highly brittle metal having a relatively high brittle resistance to high-pressure fluid fuel is more expensive than a normal metal.

ところが、上記した従来の燃料注入用チェックバルブでは、燃料タンクの燃料注入口に固定される第１バルブベース構成部品１のみならず、燃料供給プラグ９に接続される第２バルブベース構成部品２も高圧流体燃料に常時晒される構成になっていた。具体的には、第１バルブベース構成部品１の中心貫通路１Ｋから側方の延びた分岐孔１Ｂや、第１バルブベース構成部品１と弁座部材５との金属接合面の隙間１Ｓを介して、第１バルブベース構成部品１の中心貫通路１Ｋ内の高圧流体燃料が第２バルブベース構成部品２の内面にも到達し、第１と第２のバルブベース構成部品１，２の両方が高圧流体燃料に常時晒される構成になっていた。このため、第１と第２のバルブベース構成部品１，２の両方を高耐脆性金属で構成する必要が生じ、燃料注入用チェックバルブの製造コストが高くなっていた。 However, in the conventional check valve for fuel injection described above, not only the first valve base component 1 fixed to the fuel inlet of the fuel tank but also the second valve base component 2 connected to the fuel supply plug 9 is provided. It was configured to be constantly exposed to high-pressure fluid fuel. Specifically, a branch hole 1B extending laterally from the central through passage 1K of the first valve base component 1 and a gap 1S on the metal joint surface between the first valve base component 1 and the valve seat member 5 are provided. Thus, the high-pressure fluid fuel in the central through passage 1K of the first valve base component 1 reaches the inner surface of the second valve base component 2 and both the first and second valve base components 1 and 2 are It was configured to be constantly exposed to high-pressure fluid fuel. For this reason, both the first and second valve base components 1 and 2 need to be made of a highly brittle metal, which increases the manufacturing cost of the fuel injection check valve.

本発明は、上記事情に鑑みてなされたもので、従来より製造コストを下げることが可能な燃料注入用チェックバルブの提供を目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fuel injection check valve capable of reducing the manufacturing cost as compared with the prior art.

上記目的を達成するためになされた請求項１の発明に係る燃料注入用チェックバルブ（１０）は、燃料電池用の燃料タンク（９６）の燃料注入口（９６Ａ）に固定されるバルブベース（１１）と、バルブベース（１１）に貫通形成され、燃料タンク（９６）内へと高圧流体燃料を注入するためのベース貫通流路（２４）と、バルブベース（１１）に直動可能に保持され、通常は、燃料タンク（９６）の内圧を受けてベース貫通流路（２４）を閉塞する閉位置に配置される一方、燃料タンク（９６）内に向けて高圧流体燃料が注入されたときには、その注入圧を受けてベース貫通流路（２４）を開通させる開位置に移動する弁体（５１）とを備えた燃料注入用チェックバルブ（１０）において、バルブベース（１１）は、ベース貫通流路（２４）が共に貫通形成された第１と第２のバルブベース構成部品（２０，３０）を結合してなり、第１バルブベース構成部品（３０）は、バルブベース（１１）のうち燃料タンク（９６）の内圧を弁体（５１）の位置に拘わらず常時受ける常時燃料受圧面の全てを有しかつ、高圧流体燃料に対する耐脆性が比較的高い高耐脆性金属で構成され、第２バルブベース構成部品（２０）は、常時燃料受圧面を有さず、高耐脆性金属より耐脆性が比較的低い通常金属で構成されたところに特徴を有する。 In order to achieve the above object, a fuel injection check valve (10) according to the invention of claim 1 is fixed to a fuel injection port (96A) of a fuel tank (96) for a fuel cell. ) And a base through passage (24) for injecting high-pressure fluid fuel into the fuel tank (96) and a valve base (11) so as to be directly movable. Normally, the fuel tank (96) is disposed at a closed position that closes the base through-flow passage (24) under the internal pressure of the fuel tank (96), while high-pressure fluid fuel is injected into the fuel tank (96), In the fuel injection check valve (10) having a valve body (51) that moves to an open position for receiving the injection pressure to open the base through-flow passage (24), the valve base (11) has a base-through flow. Road (24 The first and second valve base components (20, 30), both of which are formed through, are joined together. The first valve base component (30) is a fuel tank (96) of the valve base (11). The second valve base component is made of a highly brittle metal that has all of the constant fuel pressure receiving surface that constantly receives the internal pressure of the valve body (51) regardless of the position of the valve body (51), and is relatively high in brittleness resistance against high pressure fluid fuel. (20) is characterized in that it is made of a normal metal that does not always have a fuel pressure-receiving surface and is relatively less brittle than a highly brittle metal.

請求項２の発明は、請求項１に記載の燃料注入用チェックバルブ（１０）において、第２バルブベース構成部品（２０）を筒形構造にして、その内側のベース貫通流路（２４）内に異物を堰き止めるためのフィルタ（５４Ａ）を収容し、フィルタ（５４Ａ）を、通常金属で構成したところに特徴を有する。 According to a second aspect of the present invention, in the fuel injection check valve (10) according to the first aspect, the second valve base component (20) is formed into a cylindrical structure, and the inside of the base through-flow passage (24) inside the second valve base component (20). The filter (54A) for damming up foreign matter is housed in the filter, and the filter (54A) is usually made of metal.

請求項３の発明は、請求項１又は２に記載の燃料注入用チェックバルブ（１０Ｗ）において、第１バルブベース構成部品（３０Ｗ）のベース貫通流路（２４）を、中間部で燃料タンク（９６）の燃料注入口（９６Ａ）側に向けて段付き状により拡径して形成した弁口用段差面（７１Ｄ）と、第１バルブベース構成部品（３０Ｗ）の一部として設けられ、ベース貫通流路（２４）のうち弁口用段差面（７１Ｄ）と対向する位置に挿入固定されると共に、ベース貫通流路（２４）の一部としての貫通孔（７０Ｂ）を有したバネ受用栓部材（７０）と、弁口用段差面（７１Ｄ）とバネ受用栓部材（７０）との間に形成され、内部に弁体（５１）を収容した弁体収容部屋（７２）と、弁口用段差面（７１Ｄ）に配置されたベース貫通流路（２４）の開口である弁口（５３Ａ）と、弁体収容部屋（７２）に収容されて、弁体（５１）が弁口（５３Ａ）を閉塞するように付勢する弁体付勢バネ（５０）と、第１バルブベース構成部品（３０Ｗ）のうち燃料注入口（９６Ａ）から離れた側の端部に設けられ、第２バルブベース構成部品（２０）が結合される部品間結合部（３１Ｎ，６３Ｎ）とを備え、弁体付勢バネ（５０）を高耐脆性金属で構成したところに特徴を有する。 According to a third aspect of the present invention, in the fuel injection check valve (10W) according to the first or second aspect, the base through flow path (24) of the first valve base component (30W) is connected to the fuel tank ( 96) a step surface (71D) for the valve port formed by expanding the diameter toward the fuel injection port (96A) side of the step and a part of the first valve base component (30W). A spring receiving plug that is inserted and fixed at a position facing the step surface (71D) for the valve port in the through channel (24) and has a through hole (70B) as a part of the base through channel (24). A valve body accommodating chamber (72) formed between the member (70), the valve opening step surface (71D) and the spring receiving plug member (70), and containing the valve body (51) therein; Of the base through channel (24) arranged on the step surface (71D) A valve body (53A), a valve body energizing spring (50) housed in the valve body housing chamber (72), and energizing the valve body (51) to close the valve opening (53A), An inter-part coupling portion (31N, 63N) that is provided at the end of the first valve base component (30W) on the side away from the fuel inlet (96A) and to which the second valve base component (20) is coupled. And the valve body biasing spring (50) is made of a highly brittle metal.

請求項４の発明は、請求項１又は２に記載の燃料注入用チェックバルブ（１０）において、第１バルブベース構成部品（３０）のベース貫通流路（２４）を、中間部で燃料タンク（９６）の燃料注入口（９６Ａ）から離れる側に向けて段付き状により拡径して形成したバネ受用段差面（５０Ｄ）と、第１バルブベース構成部品（３０）の一部として設けられ、ベース貫通流路（２４）のうちバネ受用段差面（５０Ｄ）と対向する位置に挿入固定されると共に、ベース貫通流路（２４）の一部としての貫通孔（５３Ｃ）を有した弁口用栓部材（５３）と、バネ受用段差面（５０Ｄ）と弁口用栓部材（５３）との間に形成され、内部に弁体（５１）を収容した弁体収容部屋（５０Ｂ）と、弁口用栓部材（５３）の弁体収容部屋（５０Ｂ）側の端面に配置された貫通孔（５３Ｃ）の開口である弁口（５３Ａ）と、弁体収容部屋（５０Ｂ）に収容されて、弁体（５１）が弁口（５３Ａ）を閉塞するように付勢する弁体付勢バネ（５０）と、第１バルブベース構成部品（３０）のうち燃料注入口（９６Ａ）から離れた側の端部に設けられ、第２バルブベース構成部品（２０）が結合される部品間結合部（２６，３５Ａ）とを備え、弁体付勢バネ（５０）を高耐脆性金属で構成したところに特徴を有する。 According to a fourth aspect of the present invention, in the fuel injection check valve (10) according to the first or second aspect, the base through-flow passage (24) of the first valve base component (30) is connected to the fuel tank ( 96) a stepped surface (50D) for receiving a spring formed by expanding the diameter of the stepped shape toward the side away from the fuel injection port (96A), and a part of the first valve base component (30). For a valve port having a through hole (53C) as a part of the base through channel (24), which is inserted and fixed at a position facing the spring receiving step surface (50D) in the base through channel (24). A valve member housing chamber (50B) formed between the plug member (53), the spring receiving step surface (50D) and the valve port plug member (53), and containing the valve body (51) therein; End face of valve plug housing chamber (50B) side of mouth plug member (53) The valve body (53A) which is an opening of the arranged through hole (53C) and the valve body (50B) are accommodated, and the valve body (51) is urged so as to close the valve opening (53A). The valve body biasing spring (50) and the first valve base component (30) are provided at the end of the first valve base component (30) away from the fuel inlet (96A), and the second valve base component (20) is coupled. And a connecting portion (26, 35A) between the parts, and the valve body biasing spring (50) is made of a highly brittle metal.

請求項５の発明は、請求項１乃至４の何れか１の請求項に記載の燃料注入用チェックバルブ（１０）において、高耐脆性金属は、ＳＵＨ６６０であるところに特徴を有する。 The invention of claim 5 is characterized in that, in the fuel injection check valve (10) according to any one of claims 1 to 4, the highly brittle metal is SUH660.

［請求項１の発明］
請求項１の燃料注入用チェックバルブ（１０）では、バルブベース（１１）を構成する第１と第２のバルブベース構成部品（２０，３０）のうち、第１バルブベース構成部品（３０）は、バルブベース（１１）のうち燃料タンク（９６）の内圧を常時受ける常時燃料受圧面の全てを有する一方、第２バルブベース構成部品（２０）は、常時燃料受圧面を有しないので、バルブベース（１１）のうち第１バルブベース構成部品（３０）のみを高耐脆性金属で構成し、第２バルブベース構成部品（２０）は通常金属で構成することができる。即ち、本発明によれば、従来のように、第２バルブベース構成部品（２０）まで高耐脆性金属で構成する必要がなくなり、第２バルブベース構成部品（２０）を通常金属で構成して、燃料注入用チェックバルブ（１０）の製造コストを下げることが可能になる。また、その通常金属を選定する場合に、耐水素脆性より高強度であることを選定条件することで、第２バルブベース構成部品（２０）の薄肉化や小型化を図ることもできる。 [Invention of Claim 1]
In the fuel injection check valve (10) according to claim 1, of the first and second valve base components (20, 30) constituting the valve base (11), the first valve base component (30) is The second valve base component (20) does not have a fuel pressure surface at all times while it has all of the constant fuel pressure surface that constantly receives the internal pressure of the fuel tank (96) in the valve base (11). Of (11), only the first valve base component (30) can be made of a highly brittle metal, and the second valve base component (20) can be made of a normal metal. That is, according to the present invention, it is not necessary to make the second valve base component (20) from a highly brittle metal as in the prior art, and the second valve base component (20) is made from a normal metal. The manufacturing cost of the fuel injection check valve (10) can be reduced. Further, when selecting the normal metal, it is possible to reduce the thickness and size of the second valve base component (20) by selecting that the strength is higher than the resistance to hydrogen embrittlement.

［請求項２の発明］
請求項２の燃料注入用チェックバルブ（１０）によれば、高圧流体燃料に混入した異物を、第２バルブベース構成部品（２０）内のフィルタ（５４Ａ）にて堰き止めることができる。 [Invention of claim 2]
According to the fuel injection check valve (10) of the present invention, foreign matter mixed in the high-pressure fluid fuel can be blocked by the filter (54A) in the second valve base component (20).

［請求項３及び４の発明］
請求項３及び４の燃料注入用チェックバルブ（１０，１０Ｗ）によれば、弁体付勢バネ（５０）にて、弁体（５１）が弁口（５３Ａ）を閉塞するように付勢しているので、燃料タンク（９６）の内圧の大小に拘わらず、確実に弁口（５３Ａ）を閉塞することができる。 [Inventions of Claims 3 and 4]
According to the fuel injection check valve (10, 10W) of claims 3 and 4, the valve body (51) is urged by the valve body urging spring (50) so as to close the valve port (53A). Therefore, the valve port (53A) can be reliably closed regardless of the internal pressure of the fuel tank (96).

［請求項５の発明］
請求項５の構成のように高耐脆性金属をＳＵＨ６６０とすれば、高耐脆性金属が水素である場合に、高い耐脆性を得ることができる。 [Invention of claim 5]
If the highly brittle metal is SUH660 as in the configuration of claim 5, high brittleness resistance can be obtained when the highly brittle metal is hydrogen.

本発明の第１実施形態に係る燃料注入用チェックバルブが燃料供給プラグと接続した状態の側断面図1 is a side sectional view showing a state in which a fuel injection check valve according to a first embodiment of the present invention is connected to a fuel supply plug. 燃料注入用チェックバルブの側断面図Cross section of fuel injection check valve 第２実施形態の燃料注入用チェックバルブの側断面図Side sectional view of the fuel injection check valve of the second embodiment 第３実施形態の燃料注入用チェックバルブの側断面図Side sectional view of the fuel injection check valve of the third embodiment 第４実施形態の燃料注入用チェックバルブの側断面図Side sectional view of the fuel injection check valve of the fourth embodiment 変形例（１）の本発明に係る燃料注入用チェックバルブの側断面図Side sectional view of the check valve for fuel injection according to the present invention of the modified example (1) 従来の燃料注入用チェックバルブの側断面図Cross-sectional side view of a conventional fuel injection check valve

［第１実施形態］
以下、本発明の実施形態を図１及び図２に基づいて説明する。図１には、燃料電池を搭載した車両９９の燃料注入部屋９８が示されている。この燃料注入部屋９８は、車両９９の外面に陥没形成されて、その開口部が開閉蓋９７にて開閉されるようになっている。燃料注入部屋９８の奥壁９０には、バルブ装着孔９１が貫通形成され、そこに本実施形態の燃料注入用チェックバルブ１０（以下、単に「チェックバルブ１０」という）が挿通されている。また、車両９９には、燃料注入部屋９８内から離れた位置に燃料電池用の燃料タンク９６が搭載され、その燃料タンク９６からは延長パイプ９５が燃料注入部屋９８の裏側近傍まで延びている。そして、その延長パイプ９５の先端部に、本発明に係る燃料タンク９６の燃料注入口９６Ａになっていて、その燃料注入口９６Ａにチェックバルブ１０のバルブベース１１が固定されている。そして、ガソリンスタンドに相当する燃料供給スタンドに備えた燃料供給プラグ８０がチェックバルブ１０に連結され、燃料供給プラグ８０から吐出された高圧流体燃料（例えば、液体水素）が、チェックバルブ１０内を通して燃料タンク９６に注入される。 [First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows a fuel injection chamber 98 of a vehicle 99 equipped with a fuel cell. The fuel injection chamber 98 is formed to be depressed on the outer surface of the vehicle 99, and its opening is opened and closed by an opening / closing lid 97. A valve mounting hole 91 is formed through the back wall 90 of the fuel injection chamber 98, and the fuel injection check valve 10 (hereinafter simply referred to as “check valve 10”) of this embodiment is inserted therethrough. In addition, a fuel tank 96 for the fuel cell is mounted on the vehicle 99 at a position away from the fuel injection chamber 98, and an extension pipe 95 extends from the fuel tank 96 to the vicinity of the back side of the fuel injection chamber 98. A fuel injection port 96A of the fuel tank 96 according to the present invention is formed at the distal end portion of the extension pipe 95, and the valve base 11 of the check valve 10 is fixed to the fuel injection port 96A. A fuel supply plug 80 provided in a fuel supply station corresponding to a gasoline station is connected to the check valve 10, and high-pressure fluid fuel (for example, liquid hydrogen) discharged from the fuel supply plug 80 passes through the check valve 10 as fuel. It is injected into the tank 96.

詳細には、チェックバルブ１０は、バルブベース１１の中心にベース貫通流路２４を備え、そのベース貫通流路２４の中間部にフィルタ部品５４、弁体５１、圧縮コイルバネ５０等を収容した構造になっている。また、図２に示すように、バルブベース１１は、第１バルブベース構成部品３０と第２バルブベース構成部品２０とを結合してなる。第２バルブベース構成部品２０は、全体が円筒状になっており、その内側はベース貫通流路２４になっている。第２バルブベース構成部品２０の先端寄り位置には、外周面にプラグ係止溝２１が形成されている。また、第２バルブベース構成部品２０の基端寄り位置には雄側ベース螺合部２６が形成され、その雄側ベース螺合部２６より基端側には、雄側ベース螺合部２６より外径が僅かに小さくなったフランジ押部２７が備えられている。そして、第２バルブベース構成部品２０のうち雄側ベース螺合部２６よりプラグ係止溝２１側が、燃料供給プラグ８０に着脱可能に連結されるレセプタクル突部２３になっている。 Specifically, the check valve 10 includes a base through passage 24 at the center of the valve base 11 and has a structure in which a filter component 54, a valve body 51, a compression coil spring 50, and the like are accommodated in an intermediate portion of the base through passage 24. It has become. As shown in FIG. 2, the valve base 11 is formed by combining a first valve base component 30 and a second valve base component 20. The entire second valve base component 20 has a cylindrical shape, and the inside thereof is a base through channel 24. A plug locking groove 21 is formed on the outer peripheral surface at a position near the tip of the second valve base component 20. Further, a male base screwing portion 26 is formed at a position near the base end of the second valve base component 20, and a male side base screwing portion 26 is provided at a base end side of the male base base screwing portion 26. A flange pressing portion 27 having an outer diameter slightly smaller is provided. In the second valve base component 20, the plug locking groove 21 side from the male base screwing portion 26 is a receptacle projection 23 that is detachably connected to the fuel supply plug 80.

第２バルブベース構成部品２０のベース貫通流路２４は、フランジ押部２７側の端部からプラグ係止溝２１寄り位置に亘る範囲が、比較的内径が大きいフィルタ収容部２４Ｄになっており、そのフィルタ収容部２４Ｄの端部より先端側が比較的内径が小さいノズル突入部２４Ｃになっている。また、ノズル突入部２４Ｃのうちフィルタ収容部２４Ｄと反対側の端部には、ノズル突入部２４Ｃより大径のノズル導入部２４Ａが備えられ、それらノズル導入部２４Ａとノズル突入部２４Ｃとの境界部分にＯリング溝２４Ｂが形成されて、そこにＯリング２５が収容されている。 The base through flow path 24 of the second valve base component 20 is a filter housing portion 24D having a relatively large inner diameter in a range extending from the end on the flange pressing portion 27 side to the position close to the plug locking groove 21. The tip side of the filter housing portion 24D is a nozzle entry portion 24C having a relatively small inner diameter. Further, a nozzle introduction portion 24A having a diameter larger than that of the nozzle entry portion 24C is provided at an end of the nozzle entry portion 24C opposite to the filter housing portion 24D, and a boundary between the nozzle introduction portion 24A and the nozzle entry portion 24C. An O-ring groove 24B is formed in the portion, and an O-ring 25 is accommodated therein.

レセプタクル突部２３に結合される燃料供給プラグ８０は以下の構成になっている。即ち、燃料供給プラグ８０は、図１に示すように、プラグスリーブ８２とその外側に嵌合されて直動する直動スリーブ８１と、プラグスリーブ８２の内側に固定されたノズル８４とを備えている。直動スリーブ８１には、レセプタクル突部２３のプラグ係止溝２１に対応した部分に複数のボール孔８２Ａが貫通成形され、各ボール孔８２Ａにそれぞれ係合ボール８３が受容された状態で直動スリーブ８１が係合ボール８３を外側から覆っている。 The fuel supply plug 80 coupled to the receptacle protrusion 23 has the following configuration. That is, as shown in FIG. 1, the fuel supply plug 80 includes a plug sleeve 82, a linear motion sleeve 81 that is fitted to the outside of the plug sleeve 82 and linearly moves, and a nozzle 84 that is fixed to the inside of the plug sleeve 82. Yes. In the linear motion sleeve 81, a plurality of ball holes 82A are formed through the portions corresponding to the plug locking grooves 21 of the receptacle projection 23, and the linear motion is performed with the engagement balls 83 being received in the respective ball holes 82A. A sleeve 81 covers the engaging ball 83 from the outside.

また、直動スリーブ８１の先端内側には、ボール受容溝８１Ａが形成されると共に、直動スリーブ８１は、ボール受容溝８１Ａが係合ボール８３からプラグスリーブ８２の先端側にずれた原点位置に配置されるように付勢されている。そして、ボール受容溝８１Ａとボール孔８２Ａとが対向する位置まで直動スリーブ８１を引いた状態でプラグスリーブ８２をレセプタクル突部２３の外側に嵌合すると、ノズル８４がレセプタクル突部２３内に挿入されてＯリング２５がノズル８４とレセプタクル突部２３の内面との間を密閉する。 Further, a ball receiving groove 81A is formed on the inner side of the front end of the linear movement sleeve 81, and the linear movement sleeve 81 is at an origin position where the ball receiving groove 81A is shifted from the engagement ball 83 toward the front end side of the plug sleeve 82. Energized to be placed. Then, when the plug sleeve 82 is fitted to the outside of the receptacle protrusion 23 in a state where the linear movement sleeve 81 is pulled to a position where the ball receiving groove 81A and the ball hole 82A face each other, the nozzle 84 is inserted into the receptacle protrusion 23. Then, the O-ring 25 seals between the nozzle 84 and the inner surface of the receptacle projection 23.

また、ボール孔８２Ａがプラグ係止溝２１に対向した状態で直動スリーブ８１を原点位置に戻すと、係合ボール８３がプラグ係止溝２１に係合して抜け止め状態になる。この状態でノズル８４の先端から高圧流体燃料が吐出され、チェックバルブ１０のベース貫通流路２４内を高圧流体燃料が流れる。 Further, when the linear movement sleeve 81 is returned to the origin position with the ball hole 82A facing the plug locking groove 21, the engagement ball 83 engages with the plug locking groove 21 to be in a retaining state. In this state, high-pressure fluid fuel is discharged from the tip of the nozzle 84, and the high-pressure fluid fuel flows in the base through channel 24 of the check valve 10.

第１バルブベース構成部品３０は、全体が筒状になっており、その内側はベース貫通流路２４になっている。第１バルブベース構成部品３０の外側面は、第２バルブベース構成部品２０側の端部から順番に円筒嵌合部３１、固定フランジ３２、工具係合部３３及びタンク側接続部３４になっている。 The first valve base component 30 is entirely cylindrical, and the inside thereof is a base through channel 24. The outer surface of the first valve base component 30 becomes a cylindrical fitting portion 31, a fixing flange 32, a tool engagement portion 33, and a tank side connection portion 34 in order from the end on the second valve base component 20 side. Yes.

工具係合部３３は、例えば、平面形状正六角形になっていて、その端面中心部からタンク側接続部３４が突出している。また、タンク側接続部３４の外周面には雄螺子３４Ａが形成されている。これに対し、図１に示すように、燃料タンク９６の燃料注入口９６Ａにおける内面には雌螺子９５Ｍが形成されている。そして、例えば、タンク側接続部３４の雄螺子３４Ａにシールテープ（図示せず）を巻き付けた状態で、そのタンク側接続部３４の雄螺子３４Ａが延長パイプ９５の雌螺子９５Ａに螺合されて、チェックバルブ１０が燃料タンク９６の燃料注入口９６Ａに固定されている。なお、工具係合部３３にスパナ等の工具を係合させることで、タンク側接続部３４と燃料注入口９６Ａとの螺合操作を容易に行うことができる。 The tool engaging portion 33 is, for example, a planar regular hexagon, and the tank side connecting portion 34 projects from the center of the end surface. A male screw 34 A is formed on the outer peripheral surface of the tank side connection portion 34. In contrast, as shown in FIG. 1, a female screw 95 M is formed on the inner surface of the fuel injection port 96 A of the fuel tank 96. For example, in a state where a seal tape (not shown) is wound around the male screw 34A of the tank side connecting portion 34, the male screw 34A of the tank side connecting portion 34 is screwed to the female screw 95A of the extension pipe 95. The check valve 10 is fixed to the fuel inlet 96A of the fuel tank 96. Note that by engaging a tool such as a spanner with the tool engaging portion 33, the screwing operation between the tank side connecting portion 34 and the fuel injection port 96A can be easily performed.

固定フランジ３２は、円筒嵌合部３１及び工具係合部３３より側方に張り出し、固定フランジ３２における複数位置には、複数の螺子孔３２Ａが貫通成形されている。そして、チェックバルブ１０における円筒嵌合部３１を、燃料注入部屋９８の奥壁９０における裏側からバルブ装着孔９１に嵌合して固定フランジ３２を奥壁９０の裏面に押し付け、奥壁９０に貫通形成された螺子挿通孔９２を通したボルト９３を固定フランジ３２の各螺子孔３２Ａに締め付けることで、チェックバルブ１０が奥壁９０に固定されている。 The fixed flange 32 projects laterally from the cylindrical fitting portion 31 and the tool engaging portion 33, and a plurality of screw holes 32 A are penetratingly formed at a plurality of positions on the fixed flange 32. Then, the cylindrical fitting portion 31 of the check valve 10 is fitted into the valve mounting hole 91 from the back side of the back wall 90 of the fuel injection chamber 98 and the fixing flange 32 is pressed against the back surface of the back wall 90 and penetrates the back wall 90. The check valve 10 is fixed to the back wall 90 by tightening the bolts 93 that pass through the formed screw insertion holes 92 into the screw holes 32 A of the fixing flange 32.

図２に示すように、第１バルブベース構成部品３０のベース貫通流路２４は、第２バルブベース構成部品２０側に向かうに従って段付き状に徐々に拡径し、それら段差面を境界にしてベース貫通流路２４内が、第２バルブベース構成部品２０側から順番に雌側ベース螺合部３５Ａ、フランジ収容部３５Ｂ、Ｏリング収容部３５Ｃ、栓嵌合部３５Ｄ、弁体バネ収容部３５Ｅ及び排出部３５Ｆになっている。また、排出部３５Ｆと弁体バネ収容部３５Ｅとの段差面が本発明に係るバネ受用段差面５０Ｄになっている。 As shown in FIG. 2, the base through flow path 24 of the first valve base component 30 gradually expands in a stepped shape toward the second valve base component 20 side, with these step surfaces as a boundary. In the base through passage 24, the female base screwing portion 35A, the flange accommodating portion 35B, the O-ring accommodating portion 35C, the plug fitting portion 35D, and the valve body spring accommodating portion 35E are sequentially arranged from the second valve base component 20 side. And a discharge part 35F. Further, the step surface between the discharge portion 35F and the valve body spring housing portion 35E is a spring receiving step surface 50D according to the present invention.

ベース貫通流路２４のうち排出部３５Ｆを除いた部分には、雌側ベース螺合部３５Ａ側から、圧縮コイルバネ５０（本発明の「弁体付勢バネ」に相当する）、弁体５１、Ｏリング５２、弁口用栓部材５３及びフィルタベース盤５４Ｂが順番に挿入組み付けされ、最後に、第２バルブベース構成部品２０の雄側ベース螺合部２６が雌側ベース螺合部３５Ａに螺合結合されている。なお、第２バルブベース構成部品２０の雄側ベース螺合部２６と第１バルブベース構成部品３０の雌側ベース螺合部３５Ａとは、例えば、接着剤によって螺合状態で固定されている。 A portion of the base through-flow passage 24 excluding the discharge portion 35F includes a compression coil spring 50 (corresponding to the “valve biasing spring” of the present invention), a valve body 51, from the female base screwing portion 35A side. The O-ring 52, the valve port plug member 53, and the filter base board 54B are inserted and assembled in order. Finally, the male base screwing portion 26 of the second valve base component 20 is screwed into the female base screwing portion 35A. Combined. The male base screwing portion 26 of the second valve base component 20 and the female base screwing portion 35A of the first valve base component 30 are fixed in a screwed state with an adhesive, for example.

弁口用栓部材５３は、第１バルブベース構成部品３０の一部として備えられ、栓嵌合部３５Ｄに嵌合された円柱状をなし、中心には、貫通孔５３Ｃがベース貫通流路２４の一部として成形されている。そして、弁口用栓部材５３の貫通孔５３Ｃのうちバネ受用段差面５０Ｄ側を向いた開口が、本発明に係る弁口５３Ａになっており、その弁口５３Ａの開口縁が弁座５３Ｂになっている。 The valve port plug member 53 is provided as a part of the first valve base component 30, has a cylindrical shape fitted to the plug fitting portion 35D, and a through hole 53C is formed at the center of the base through channel 24. It is molded as part of The opening facing the spring receiving stepped surface 50D side of the through hole 53C of the valve port plug member 53 is the valve port 53A according to the present invention, and the opening edge of the valve port 53A is the valve seat 53B. It has become.

弁口用栓部材５３の外周面における上流側の端部には、バックアップリング５３Ｆが嵌合されている。そして、Ｏリング収容部３５Ｃの下流側端面とバックアップリング５３Ｆとの間の環状スペースにＯリング５２が押し潰された状態で収容されている。そして、弁口用栓部材５３とバネ受用段差面５０Ｄとに挟まれた弁体バネ収容部３５Ｅ内の空間が、本発明に係る弁体収容部屋５０Ｂになって、そこに弁体５１と圧縮コイルバネ５０とが収容されている。 A backup ring 53 F is fitted to the upstream end of the outer peripheral surface of the valve port plug member 53. Then, the O-ring 52 is accommodated in an annular space between the downstream end surface of the O-ring accommodating portion 35C and the backup ring 53F in a crushed state. And the space in the valve body spring accommodating part 35E sandwiched between the valve port plug member 53 and the spring receiving step surface 50D becomes the valve body accommodating chamber 50B according to the present invention, and the valve body 51 and the compressed portion are compressed there. A coil spring 50 is accommodated.

弁体５１は、円柱部５１Ａの一端面に円錐部５１Ｂを備える一方、他端面の中央からエンボス部５１Ｃを突出させた形状になっている。そして、弁体５１は、エンボス部５１Ｃをバネ受用段差面５０Ｄ側に向けた状態にされて、その弁体５１の円柱部５１Ａにおけるエンボス部５１Ｃ周りの端面と、バネ受用段差面５０Ｄとの間で圧縮コイルバネ５０が突っ張り状態になって弁体５１を弁口５３Ａに向けて付勢している。 The valve body 51 is provided with a conical portion 51B on one end surface of the cylindrical portion 51A, and has an embossed portion 51C protruding from the center of the other end surface. And the valve body 51 is made into the state which orient | assigned the embossed part 51C to the spring receiving level | step difference surface 50D side, between the end surface around the embossed part 51C in the cylindrical part 51A of the valve body 51, and the spring receiving level | step difference surface 50D. As a result, the compression coil spring 50 is stretched to urge the valve body 51 toward the valve port 53A.

フィルタベース盤５４Ｂは、中心に中央貫通孔５４Ｅを有した円盤状になている。そして、第２バルブベース構成部品２０の雄側ベース螺合部２６を第１バルブベース構成部品３０の雌側ベース螺合部３５Ａに締め付けることで、フィルタベース盤５４Ｂと弁口用栓部材５３とがバルブベース１１内に固定されている。 The filter base board 54B has a disk shape having a central through hole 54E at the center. Then, by tightening the male base screwing portion 26 of the second valve base component 20 to the female base screwing portion 35A of the first valve base component 30, the filter base board 54B, the valve port plug member 53, Is fixed in the valve base 11.

フィルタベース盤５４Ｂのうち弁口用栓部材５３と反対側の端面からはフィルタ筒部５４Ａ（本発明の「フィルタ」に相当する）が突出している。そして、これらフィルタベース盤５４Ｂとフィルタ筒部５４Ａとからフィルタ部品５４が構成されている。そのフィルタ筒部５４Ａは先端面を先端壁５４Ｄにて閉塞され、全体に複数の流体通過孔５４Ｃが穿孔された円筒構造になっている。そして、フィルタ筒部５４Ａは、第２バルブベース構成部品２０のフィルタ収容部２４Ｄ内に遊嵌されている。 A filter cylinder 54A (corresponding to the “filter” of the present invention) protrudes from the end surface of the filter base board 54B opposite to the valve port plug member 53. The filter base 54B and the filter cylinder portion 54A constitute a filter component 54. The filter cylinder portion 54A has a cylindrical structure in which a distal end surface is closed by a distal end wall 54D, and a plurality of fluid passage holes 54C are perforated. The filter cylinder portion 54A is loosely fitted in the filter housing portion 24D of the second valve base component 20.

さて、本実施形態のチェックバルブ１０では、高圧流体燃料に対する耐脆性を考慮して、上記したチェックバルブ１０の各構成部品は以下の材料で構成されている。即ち、チェックバルブ１０の構成部品のうち第１バルブベース構成部品３０と、その一部としての弁口用栓部材５３と、弁体５１と、圧縮コイルバネ５０とは、高圧流体燃料に対する耐脆性が比較的高い高耐脆性金属（例えば、ＳＵＨ６６０）で構成され、それら以外の残りの構成部品である第２バルブベース構成部品２０と、フィルタ部品５４とは、高耐脆性金属より耐脆性が比較的低い通常金属（例えば、Ｓ４５Ｃ，ＳＵＳ３０３）で構成されている。 Now, in the check valve 10 of the present embodiment, the components of the check valve 10 described above are made of the following materials in consideration of resistance to high-pressure fluid fuel. That is, the first valve base component 30 among the components of the check valve 10, the valve port plug member 53, the valve body 51, and the compression coil spring 50 as part thereof are resistant to high-pressure fluid fuel. The second valve base component 20 and the filter component 54, which are made of a relatively high highly brittle metal (for example, SUH660) and the other remaining components, are relatively more brittle than the high brittle metal. It is composed of a low normal metal (for example, S45C, SUS303).

本実施形態の構成に関する説明は以上である。次に、本実施形態の作用効果について説明する。図１に示すように、燃料供給プラグ８０をチェックバルブ１０に接続して燃料供給プラグ８０から高圧流体燃料を注入すると、その注入圧によって図２に示した弁体５１が弁座５３Ｂから離れた開位置に移動して弁口５３Ａが開き、高圧流体燃料がチェックバルブ１０における第１と第２のバルブベース構成部品２０，３０のベース貫通流路２４を通過し、図１に示した燃料タンク９６に充填される。このとき、高圧流体燃料と共に異物がベース貫通流路２４に進入した場合には、フィルタ筒部５４Ａによって堰き止められる。 This completes the description of the configuration of the present embodiment. Next, the effect of this embodiment is demonstrated. As shown in FIG. 1, when the fuel supply plug 80 is connected to the check valve 10 and high pressure fluid fuel is injected from the fuel supply plug 80, the valve body 51 shown in FIG. 2 is separated from the valve seat 53B by the injection pressure. The valve port 53A is opened by moving to the open position, and the high-pressure fluid fuel passes through the base through passages 24 of the first and second valve base components 20 and 30 in the check valve 10, and the fuel tank shown in FIG. 96 is filled. At this time, when foreign matter enters the base through passage 24 together with the high-pressure fluid fuel, it is blocked by the filter cylinder portion 54A.

燃料供給プラグ８０からの高圧流体燃料の供給を止めると、燃料タンク９６内の高圧流体燃料の内圧と圧縮コイルバネ５０の弾発力とによって、図２に示すように、弁体５１が弁座５３Ｂに押し付けられた閉位置に移動して弁口５３Ａが閉じる。すると、第１と第２のバルブベース構成部品２０，３０のうち第１バルブベース構成部品３０のみが燃料タンク９６内の高圧流体燃料の圧力を受け、第２バルブベース構成部品２０は高圧流体燃料の圧力を受けない状態になる。即ち、本実施形態のチェックバルブ１０では、バルブベース１１を構成する第１と第２のバルブベース構成部品２０，３０のうち、第１バルブベース構成部品３０は、バルブベース１１のうち燃料タンク９６の内圧を弁体５１の位置に拘わらず常時受ける常時燃料受圧面の全てを有する一方、第２バルブベース構成部品２０は、常時燃料受圧面を有しない構成になている。これにより、バルブベース１１のうち第１バルブベース構成部品３０のみを高耐脆性金属で構成し、第２バルブベース構成部品２０は通常金属で構成することができる。つまり、本実施形態のチェックバルブ１０では、従来のように、第２バルブベース構成部品２０まで高耐脆性金属で構成する必要がなくなり、第２バルブベース構成部品２０を通常金属で構成して、燃料注入用チェックバルブ１０の製造コストを下げることが可能になる。また、その通常金属を選定する場合に、耐水素脆性より高強度であることを選定条件することで、第２バルブベース構成部品２０の薄肉化して、その分、フィルタ収容部２４Ｄの内径を大きくすることができる。これにより、フィルタ筒部５４Ａを大型化して、フィルタ筒部５４Ａにおける流体通過面積を広くし、高圧流体燃料の注入可能な最大流量を上げることができる。さらに、本実施形態のチェックバルブ１０では、燃料タンク９６から高圧流体燃料を抜いた状態で第１バルブベース構成部品３０から第２バルブベース構成部品２０を取り外せば、第１バルブベース構成部品３０を燃料注入部屋９８の奥壁９０及び延長パイプ９５に固定した状態で、チェックバルブ１０内のフィルタ部品５４、弁口用栓部材５３等の部品を交換することができる。 When the supply of the high-pressure fluid fuel from the fuel supply plug 80 is stopped, the valve body 51 is moved to the valve seat 53B by the internal pressure of the high-pressure fluid fuel in the fuel tank 96 and the elastic force of the compression coil spring 50 as shown in FIG. The valve port 53A is closed by moving to the closed position pressed against the valve. Then, only the first valve base component 30 among the first and second valve base components 20 and 30 receives the pressure of the high pressure fluid fuel in the fuel tank 96, and the second valve base component 20 becomes the high pressure fluid fuel. It will be in the state which does not receive the pressure of. That is, in the check valve 10 of the present embodiment, the first valve base component 30 of the first and second valve base components 20 and 30 constituting the valve base 11 is the fuel tank 96 of the valve base 11. The second valve base component 20 has a configuration that does not always have a fuel pressure receiving surface, while having all of the constant fuel pressure receiving surface that constantly receives the internal pressure regardless of the position of the valve body 51. Thus, only the first valve base component 30 of the valve base 11 can be made of a highly brittle metal, and the second valve base component 20 can be made of a normal metal. That is, in the check valve 10 of the present embodiment, it is not necessary to configure the second valve base component 20 with a highly brittle metal as in the prior art, and the second valve base component 20 is configured with a normal metal, The manufacturing cost of the fuel injection check valve 10 can be reduced. Further, when selecting the normal metal, the second valve base component 20 is thinned by selecting the condition that the strength is higher than the hydrogen embrittlement resistance, and the inner diameter of the filter housing portion 24D is increased accordingly. can do. Thereby, the filter cylinder part 54A can be enlarged, the fluid passage area in the filter cylinder part 54A can be increased, and the maximum flow rate at which high-pressure fluid fuel can be injected can be increased. Furthermore, in the check valve 10 of the present embodiment, the first valve base component 30 is removed by removing the second valve base component 20 from the first valve base component 30 with the high-pressure fluid fuel removed from the fuel tank 96. The parts such as the filter part 54 and the valve port plug member 53 in the check valve 10 can be exchanged while being fixed to the back wall 90 and the extension pipe 95 of the fuel injection chamber 98.

なお、従来のチェックバルブ（図７参照）のように、第２バルブベース構成部品内にフィルタ部品を挿入した後に弁口用栓部材を挿入する構成にすると、弁口用栓部材５３よりフィルタ部品５４を小さくしなければならないが、本実施形態のチェックバルブ１０では、弁口用栓部材５３が第１バルブベース構成部品３０内に嵌合される一方、フィルタ部品５４は第２バルブベース構成部品２０に嵌合される構造になっているので、弁口用栓部材５３よりフィルタ部品５４（特に、フィルタ筒部５４Ａ）の径を大きくすることができる。 As in the conventional check valve (see FIG. 7), when the valve port plug member is inserted after the filter component is inserted into the second valve base component, the filter component is inserted from the valve port plug member 53. In the check valve 10 of the present embodiment, the valve port plug member 53 is fitted into the first valve base component 30, while the filter component 54 is the second valve base component. 20, the diameter of the filter component 54 (particularly, the filter cylinder portion 54 A) can be made larger than that of the valve port plug member 53.

［第２実施形態］
本実施形態のチェックバルブ１０Ｖは、図３に示されており、第１バルブベース構成部品３０Ｖと第２バルブベース構成部品２０Ｖとの結合部分が第１実施形態と異なる。本実施形態の第１バルブベース構成部品３０Ｖは、工具係合部３３より第２バルブベース構成部品２０Ｖ側に結合軸部３１Ｖを備え、その結合軸部３１Ｖの外周面に雄側ベース螺合部３１Ｎが形成されている。また、結合軸部３１Ｖの端面には、前記第１実施形態で説明したＯリング収容部３５Ｃが開放している。 [Second Embodiment]
The check valve 10V of this embodiment is shown in FIG. 3, and the connecting portion between the first valve base component 30V and the second valve base component 20V is different from that of the first embodiment. The first valve base component 30V of the present embodiment includes a coupling shaft portion 31V on the second valve base component 20V side from the tool engagement portion 33, and a male base screwing portion on the outer peripheral surface of the coupling shaft portion 31V. 31N is formed. In addition, the O-ring accommodating portion 35C described in the first embodiment is open on the end surface of the coupling shaft portion 31V.

一方、第２バルブベース構成部品２０Ｖのベース貫通流路２４には、前記したフィルタ収容部２４Ｄより第１バルブベース構成部品３０Ｖ側に、フランジ収容部６３Ｌ、雌側ベース螺合部６３Ｎが形成されている。そして、フランジ収容部６３Ｌにフィルタベース盤５４Ｂが嵌合された状態で、雌側ベース螺合部６３Ｎに前記雄側ベース螺合部３１Ｎが螺合し、第１と第２のバルブベース構成部品２０Ｖ，３０Ｖが結合されている。また、第２バルブベース構成部品２０Ｖには、前記第１実施形態の円筒嵌合部３１、固定フランジ３２に相当する円筒嵌合部６１、固定フランジ６２が備えられ、固定フランジ６２に複数の螺子孔６２Ａが貫通形成されている。さらに、円筒嵌合部６１とレセプタクル突部２３との間には、断面が正六角形の工具係合部６０が備えられている。上記以外の構成は、第１実施形態と同様であるので重複した説明は省略する。本実施形態のチェックバルブ１０Ｖによっても、第１実施形態のチェックバルブ１０と同様の作用効果を奏する。 On the other hand, in the base through passage 24 of the second valve base component 20V, a flange housing portion 63L and a female base screwing portion 63N are formed on the first valve base component 30V side from the filter housing portion 24D. ing. Then, in a state where the filter base board 54B is fitted to the flange housing portion 63L, the male base screwing portion 31N is screwed to the female base screwing portion 63N, and the first and second valve base components. 20V and 30V are combined. Further, the second valve base component 20V is provided with the cylindrical fitting portion 31 of the first embodiment, the cylindrical fitting portion 61 corresponding to the fixed flange 32, and the fixed flange 62, and the fixed flange 62 has a plurality of screws. A hole 62A is formed through. Further, a tool engagement portion 60 having a regular hexagonal cross section is provided between the cylindrical fitting portion 61 and the receptacle protrusion 23. Since the configuration other than the above is the same as that of the first embodiment, a duplicate description is omitted. The check valve 10V of the present embodiment also provides the same operational effects as the check valve 10 of the first embodiment.

［第３実施形態］
本実施形態のチェックバルブ１０Ｗは、図４に示されており、第１バルブベース構成部品３０Ｗの構造が主として第２実施形態と異なる。以下、第２実施形態と異なる構成に関してのみ説明する。本実施形態の第１バルブベース構成部品３０Ｗのベース貫通流路２４は、第２バルブベース構成部品２０Ｖから離れるに従って内径が段付き状に徐々に拡径し、それら段差面を境界にしてベース貫通流路２４内が、第２バルブベース構成部品２０側から順番に小径部７１Ａ、中径部７１Ｂ、大径部７１Ｃになっている。そして、小径部７１Ａと中径部７１Ｂとの段差面が本発明に係る弁口用段差面７１Ｄになっていて、その弁口用段差面７１Ｄにおけるベース貫通流路２４の開口が、本発明に係る弁口５３Ａになっている。 [Third Embodiment]
The check valve 10W of this embodiment is shown in FIG. 4, and the structure of the first valve base component 30W is mainly different from that of the second embodiment. Only the configuration different from that of the second embodiment will be described below. The base through-flow passage 24 of the first valve base component 30W of the present embodiment gradually increases in a stepped shape as the distance from the second valve base component 20V increases, and the base passes through the step surface as a boundary. The inside of the flow path 24 is a small diameter portion 71A, a medium diameter portion 71B, and a large diameter portion 71C in order from the second valve base component 20 side. The step surface between the small-diameter portion 71A and the medium-diameter portion 71B is the valve-port step surface 71D according to the present invention, and the opening of the base through channel 24 in the valve-port step surface 71D corresponds to the present invention. This is the valve port 53A.

大径部７１Ｃのうち中径部７１Ｂ側の端部には、本発明に係るバネ受用栓部材７０が圧入され、バネ受用栓部材７０と弁口用段差面７１Ｄとの間の領域が弁体収容部屋７２になっている。このバネ受用栓部材７０は、第１バルブベース構成部品３０Ｗの一部として備えられ、中心には第１バルブベース構成部品３０Ｗのベース貫通流路２４の一部としての貫通孔７０Ｂが形成されている。また、バネ受用栓部材７０のうち弁口用段差面７１Ｄとの対向面には、貫通孔７０Ｂの開口縁からエンボス７０Ａが突出している。そして、弁体収容部屋７２内で、圧縮コイルバネ５０の一端部がエンボス７０Ａの外側に嵌合された状態で、圧縮コイルバネ５０の他端部が弁体５１を弁口５３Ａに向けて付勢している。その他の構成に関しては、第２実施形態と同様である。本実施形態のチェックバルブ１０Ｗによっても、第１及び第２の実施形態のチェックバルブ１０，１０Ｖと同様の作用効果を奏する。 A spring receiving plug member 70 according to the present invention is press-fitted into an end of the large diameter portion 71C on the medium diameter portion 71B side, and a region between the spring receiving plug member 70 and the valve opening step surface 71D is a valve body. It is a containment room 72. The spring receiving plug member 70 is provided as a part of the first valve base component 30W, and a through hole 70B as a part of the base through passage 24 of the first valve base component 30W is formed at the center. Yes. Further, an emboss 70A projects from the opening edge of the through hole 70B on the surface of the spring receiving plug member 70 that faces the step surface 71D for the valve opening. In the valve body accommodating chamber 72, the other end portion of the compression coil spring 50 biases the valve body 51 toward the valve port 53A in a state where one end portion of the compression coil spring 50 is fitted to the outside of the emboss 70A. ing. Other configurations are the same as those in the second embodiment. The check valve 10W of the present embodiment also provides the same operational effects as the check valves 10 and 10V of the first and second embodiments.

［第４実施形態］
本実施形態のチェックバルブ１０Ｘは、図５示されており、フィルタ部品５４を備えていない点と、第１と第２のバルブベース構成部品２０Ｘ，３０Ｘの結合構造が主として第３実施形態と異なる。以下、第２実施形態と異なる構成に関してのみ説明する。本実施形態の第２バルブベース構成部品２０Ｘのベース貫通流路２４は、ノズル突入部２４Ｃが第１バルブベース構成部品３０Ｘ寄り位置まで延び、そこで段付き状に拡径して圧入部２４Ｆになっている。第１バルブベース構成部品３０Ｘは、円柱構造部３１Ｆの一端面からタンク側接続部３４を突出させた構造をなし、その円柱構造部３１Ｆが上記圧入部２４Ｆに圧入されている。その他の構成に関しては、第３実施形態と同様である。 [Fourth Embodiment]
The check valve 10X of this embodiment is shown in FIG. 5, and is different from the third embodiment mainly in that the filter part 54 is not provided and the coupling structure of the first and second valve base components 20X and 30X. . Only the configuration different from that of the second embodiment will be described below. In the base through flow path 24 of the second valve base component 20X of the present embodiment, the nozzle entry portion 24C extends to a position closer to the first valve base component 30X, where the diameter expands into a stepped shape and becomes a press fit portion 24F. ing. The first valve base component 30X has a structure in which the tank side connection portion 34 protrudes from one end surface of the columnar structure portion 31F, and the columnar structure portion 31F is press-fitted into the press-fit portion 24F. Other configurations are the same as those in the third embodiment.

［他の実施形態］
本発明は、前記実施形態に限定されるものではなく、例えば、以下に説明するような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。 [Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

（１）前記第１〜第４の実施形態では、圧縮コイルバネ５０が高圧流体燃料の圧力を常時受ける位置に配置されていたが、高圧流体燃料の圧力を常時受けない位置に圧縮コイルバネ５０を配置してもよい。具体的には、例えば、図６に示すように、第４実施形態で説明したチェックバルブ１０Ｘを変形し、そのチェックバルブ１０Ｘにおけるベース貫通流路２４の小径部７１Ａの下流側に弁体５１Ｙを配置する一方、小径部７１Ａより上流側に係止部材５１Ｚを配置する。そして、小径部７１Ａに遊嵌した連結シャフト５１Ｊにてそれら弁体５１Ｙと係止部材５１Ｚとを連結し、圧縮コイルバネ５０を小径部７１Ａの上流側の開口縁と、係止部材５１Ｚとの間で突っ張り状態に設けた構成にしてもよい。この構成によれば、圧縮コイルバネ５０を、高圧流体燃料の圧力を常時受けない位置に配置することができ、圧縮コイルバネ５０を通常の金属で構成することができる。 (1) In the first to fourth embodiments, the compression coil spring 50 is disposed at a position that constantly receives the pressure of the high-pressure fluid fuel. However, the compression coil spring 50 is disposed at a position that does not always receive the pressure of the high-pressure fluid fuel. May be. Specifically, for example, as shown in FIG. 6, the check valve 10X described in the fourth embodiment is modified, and a valve body 51Y is provided on the downstream side of the small diameter portion 71A of the base through passage 24 in the check valve 10X. On the other hand, the locking member 51Z is disposed upstream of the small diameter portion 71A. The valve body 51Y and the locking member 51Z are connected by a connecting shaft 51J loosely fitted to the small diameter portion 71A, and the compression coil spring 50 is connected between the opening edge on the upstream side of the small diameter portion 71A and the locking member 51Z. It is also possible to use a configuration in which the tension is provided. According to this structure, the compression coil spring 50 can be arrange | positioned in the position which does not receive the pressure of a high pressure fluid fuel at all times, and the compression coil spring 50 can be comprised with a normal metal.

（２）前記第１〜第４の実施形態では、第１と第２のバルブベース構成部品が螺合結合又は圧入結合されていたが、ろう付け、溶接で第１と第２のバルブベース構成部品を結合してもよい。 (2) In the first to fourth embodiments, the first and second valve base components are screwed or press-fitted, but the first and second valve base configurations are brazed and welded. Parts may be combined.

（３）前記第１実施形態では、車両に搭載されたチェックバルブ１０を例示したが、例えば、工場や高圧流体燃料を供給するための燃料供給スタンド等に設置された燃料電池用の燃料タンクの燃料注入口に固定されるチェックバルブも本発明の技術的範囲に含まれる。 (3) In the first embodiment, the check valve 10 mounted on the vehicle is exemplified. However, for example, a fuel tank for a fuel cell installed in a factory, a fuel supply stand for supplying high-pressure fluid fuel, or the like. A check valve fixed to the fuel inlet is also included in the technical scope of the present invention.

（４）前記第１実施形態のチェックバルブ１０は、第１バルブベース構成部品３０が延長パイプ９５を介して燃料タンク９６に常時接続されていたが、燃料タンクに第２のバルブベース構成部品を直接接続した構成にしてもよい。 (4) In the check valve 10 of the first embodiment, the first valve base component 30 is always connected to the fuel tank 96 via the extension pipe 95, but the second valve base component is attached to the fuel tank. A directly connected configuration may be used.

（５）また、延長パイプ又は燃料タンクに螺合結合されていたが、第２のバルブベース構成部品を溶接又はろう着けしてもよい。 (5) Also, the second valve base component may be welded or brazed, although it is screwed into the extension pipe or fuel tank.

（６）前記第１実施形態では、Ｏリング５２が、弁口用栓部材５３の外周面と第１バルブベース構成部品３０の内周面との間に装着されていたが、弁座部材と第２のバルブベース構成部品とにおける軸方向の対向面間に環状シール部材を配置してもよい。 (6) In the first embodiment, the O-ring 52 is mounted between the outer peripheral surface of the valve port plug member 53 and the inner peripheral surface of the first valve base component 30, but the valve seat member An annular seal member may be disposed between the axially facing surfaces of the second valve base component.

（７）前記第１実施形態では、フィルタ部品５４のフィルタベース盤５４Ｂが第１と第２のバルブベース構成部品２０，３０の間に挟持されていたが、バルブベースに対するフィルタ部品の構造はどのようなものであってもよい。例えば、フィルタベース盤５４Ｂを小型化してフィルタ収容部２４Ｄに圧入してもよい。 (7) In the first embodiment, the filter base board 54B of the filter component 54 is sandwiched between the first and second valve base components 20 and 30, but what is the structure of the filter component relative to the valve base? It may be something like this. For example, the filter base board 54B may be downsized and press-fitted into the filter housing portion 24D.

（８）前記第１実施形態では、高耐脆性金属として「ＳＵＨ６６０」を使用していたが、高耐脆性金属として「ＳＵＳ４２０」，「ＳＵＳ４３１」を使用してもよい。また、高耐脆性金属として「ＳＵＨ６６０」を使用し、その「ＳＵＨ６６０」より耐脆性が比較的低い通常金属として「ＳＵＳ４２０」，「ＳＵＳ４３１」を使用してもよい。 (8) In the first embodiment, “SUH660” is used as the highly brittle metal, but “SUS420” and “SUS431” may be used as the highly brittle metal. Further, “SUH660” may be used as the highly brittle metal, and “SUS420” and “SUS431” may be used as the normal metal having relatively lower brittleness resistance than “SUH660”.

１０，１０Ｖ，１０Ｗ，１０Ｘ燃料注入用チェックバルブ
１１バルブベース
２０，２０Ｖ，２０Ｘ第２バルブベース構成部品
２３レセプタクル突部
２４ベース貫通流路
３０，３０Ｖ，３０Ｗ，３０Ｘ第１バルブベース構成部品
５０圧縮コイルバネ（弁体付勢バネ）
５０Ｂ弁体収容部屋
５０Ｄバネ受用段差面
５１，５１Ｙ弁体
５３弁口用栓部材
５３Ａ弁口
５３Ｃ貫通孔
５４Ａフィルタ筒部（フィルタ）
７０バネ受用栓部材
７０Ｂ貫通孔
７１Ｄ弁口用段差面
７２弁体収容部屋
８０燃料供給プラグ
９６燃料タンク
９６Ａ燃料注入口 10, 10V, 10W, 10X Fuel injection check valve 11 Valve base 20, 20V, 20X Second valve base component 23 Receptacle protrusion 24 Base through flow path 30, 30V, 30W, 30X First valve base component 50 Compression Coil spring (valve biasing spring)
50B Valve body storage chamber 50D Spring receiving step surface 51, 51Y Valve body 53 Valve port plug member 53A Valve port 53C Through hole 54A Filter cylinder (filter)
70 Spring receiving plug member 70B Through hole 71D Step surface for valve opening 72 Valve body accommodating chamber 80 Fuel supply plug 96 Fuel tank 96A Fuel inlet

Claims

A valve base (11) fixed to a fuel inlet (96A) of a fuel tank (96) for a fuel cell;
A base through channel (24) formed through the valve base (11) for injecting high-pressure fluid fuel into the fuel tank (96);
The fuel tank is held in the valve base (11) so as to be directly movable, and is normally disposed at a closed position that receives the internal pressure of the fuel tank (96) and closes the base through passage (24). (96) When the high-pressure fluid fuel is injected into the inside, the valve body (51) that receives the injection pressure and moves to an open position that opens the base through channel (24) is provided. In the check valve (10),
The valve base (11) is formed by combining first and second valve base components (20, 30) in which the base through-flow passage (24) is formed.
The first valve base component (30) has all of the constant fuel pressure receiving surface that constantly receives the internal pressure of the fuel tank (96) regardless of the position of the valve body (51) in the valve base (11). And made of a highly brittle metal that has a relatively high brittleness resistance against high-pressure fluid fuel,
The fuel injection check characterized in that the second valve base component (20) does not have the fuel pressure receiving surface at all times and is made of a normal metal having a relatively low brittleness resistance than the highly brittle metal. Valve (10).

The second valve base component (20) has a cylindrical structure, and a filter (54A) for blocking foreign matter is accommodated in the base through-flow passage (24) inside the second valve base component (20). The fuel injection check valve (10) according to claim 1, wherein the check valve (10) is made of the normal metal.

The base through-flow passage (24) of the first valve base component (30W) is expanded in a stepped shape toward the fuel inlet (96A) side of the fuel tank (96) at an intermediate portion. The formed step surface (71D) for the valve opening,
It is provided as a part of the first valve base component (30W), and is inserted and fixed at a position facing the step surface (71D) for the valve port in the base through passage (24), and the base through A spring receiving plug member (70) having a through hole (70B) as a part of the flow path (24);
A valve body accommodating chamber (72) formed between the valve opening step surface (71D) and the spring receiving plug member (70) and housing the valve body (51) therein;
A valve port (53A) that is an opening of the base through-flow passage (24) disposed on the step surface (71D) for the valve port;
A valve body biasing spring (50) housed in the valve body housing chamber (72) and biasing the valve body (51) so as to close the valve port (53A);
An inter-part coupling portion (31N) provided at an end of the first valve base component (30W) on the side away from the fuel inlet (96A) and coupled to the second valve base component (20). 63N), and
The fuel injection check valve (10W) according to claim 1 or 2, wherein the valve body biasing spring (50) is made of the highly brittle metal.

The diameter of the base through-flow passage (24) of the first valve base component (30) is increased in a stepped manner toward the side away from the fuel inlet (96A) of the fuel tank (96) at an intermediate portion. A step surface (50D) for receiving a spring formed as described above,
It is provided as a part of the first valve base component (30), and is inserted and fixed at a position facing the spring receiving step surface (50D) in the base through flow path (24), and the base through flow A valve opening plug member (53) having a through hole (53C) as a part of the passage (24);
A valve body accommodating chamber (50B) formed between the spring receiving step surface (50D) and the valve port plug member (53) and accommodating the valve body (51) therein;
A valve port (53A) which is an opening of the through hole (53C) disposed on an end surface of the valve port plug member (53) on the valve body housing chamber (50B) side;
A valve body biasing spring (50) housed in the valve body housing chamber (50B) and biasing the valve body (51) so as to close the valve port (53A);
An inter-part coupling part (26) provided at an end of the first valve base component (30) on the side away from the fuel inlet (96A) and coupled to the second valve base component (20). 35A),
The fuel injection check valve (10) according to claim 1 or 2, wherein the valve body biasing spring (50) is made of the highly brittle metal.

The fuel injection check valve (10) according to any one of claims 1 to 4, wherein the highly brittle metal is SUH660.