JP7127547B2 - pressure vessel - Google Patents

pressure vessel Download PDF

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JP7127547B2
JP7127547B2 JP2019002092A JP2019002092A JP7127547B2 JP 7127547 B2 JP7127547 B2 JP 7127547B2 JP 2019002092 A JP2019002092 A JP 2019002092A JP 2019002092 A JP2019002092 A JP 2019002092A JP 7127547 B2 JP7127547 B2 JP 7127547B2
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mouthpiece
liner
reinforced resin
pressure vessel
reinforcing layer
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JP2020112189A (en
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統 澤井
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Toyota Motor Corp
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Toyota Motor Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

Description

本発明は、圧力容器に関する。 The present invention relates to pressure vessels.

下記特許文献１には、水素が内部に貯蔵される圧力容器が開示されている。この文献に記載された圧力容器は円筒状のライナと、ＣＦＲＰ（炭素繊維強化樹脂）を用いて形成されライナを補強する補強部（補強層）と、を備えている。また、ライナの端部には、口金が取付けられている。この口金に設けられた突起部が補強層に食い込む（変形させる）ことで、口金がライナに強固に取付けられるようになっている。 Patent Literature 1 listed below discloses a pressure vessel in which hydrogen is stored. The pressure vessel described in this document includes a cylindrical liner and a reinforcing portion (reinforcing layer) that is formed using CFRP (carbon fiber reinforced resin) and reinforces the liner. A base is attached to the end of the liner. The protrusions provided on the mouthpiece bite into (deform) the reinforcing layer, thereby firmly attaching the mouthpiece to the liner.

特開２０１８－１１２２０４号公報JP 2018-112204 A

ところで、繊維強化樹脂の一部が変形された状態で口金が取付けられる構成では、繊維強化樹脂の内部の繊維の損傷を低減できることが望ましい。 By the way, in a configuration in which the mouthpiece is attached while the fiber reinforced resin is partially deformed, it is desirable to be able to reduce damage to the fibers inside the fiber reinforced resin.

本発明は上記事実を考慮し、繊維強化樹脂の内部の繊維が損傷することを抑制できる圧力容器を得ることが目的である。 SUMMARY OF THE INVENTION In consideration of the above facts, an object of the present invention is to obtain a pressure vessel capable of suppressing damage to the fibers inside the fiber reinforced resin.

本発明の圧力容器は、内部に気体が充填されるライナと、繊維強化樹脂を用いて前記ライナの外表面に接した状態で形成され、前記ライナを外側から覆う補強部と、前記補強部を構成する繊維強化樹脂の内部の繊維に沿ってのびる係止部を有し、該係止部が前記補強部を構成する繊維強化樹脂を変形させた状態で前記ライナに取付けられた口金と、を備えている。 The pressure vessel of the present invention includes a liner filled with gas, a reinforcing portion formed using a fiber-reinforced resin so as to be in contact with the outer surface of the liner and covering the liner from the outside, and the reinforcing portion. a mouthpiece having a locking portion extending along the fibers inside the fiber-reinforced resin constituting the fiber-reinforced resin, and attached to the liner in a state in which the locking portion deforms the fiber-reinforced resin constituting the reinforcing portion; I have.

本発明の圧力容器は、繊維強化樹脂の内部の繊維が損傷することを抑制できる、という優れた効果を有する。 ADVANTAGE OF THE INVENTION The pressure vessel of this invention has the outstanding effect that it can suppress that the fiber inside a fiber reinforced resin is damaged.

圧力容器の端部の断面を示す拡大断面図である。It is an expanded sectional view which shows the cross section of the edge part of a pressure vessel. 口金を示す斜視図である。It is a perspective view which shows a base. 口金の口金本体部を内周側から見た拡大平面図である。Fig. 3 is an enlarged plan view of the mouthpiece main body of the mouthpiece as viewed from the inner peripheral side; 図３に示された４－４線に沿って切断した口金本体部の係止爪を拡大して示す拡大断面図である。FIG. 4 is an enlarged cross-sectional view showing a locking claw of the mouthpiece body section cut along line 4-4 shown in FIG. 3; ライナの端部及び口金等を示す斜視図であり、締結部が螺合される前の状態を示している。It is a perspective view showing the end of the liner, the mouthpiece, etc., and shows a state before the fastening portion is screwed together. 図５に示された６－６線に沿って切断したライナの端部等を示す断面図である。FIG. 6 is a cross-sectional view showing the end of the liner, etc. taken along line 6-6 shown in FIG. 5; ライナの端部及び口金等を示す斜視図であり、締結部が螺合された状態を示している。It is a perspective view showing the end of the liner, the mouthpiece, etc., and shows a state in which the fastening portion is screwed. 図７に示された８－８線に沿って切断したライナの端部等を示す断面図である。FIG. 8 is a cross-sectional view showing the end of the liner, etc., taken along line 8-8 shown in FIG. 7;

（圧力容器の概略の構成）
図１を用いて、本発明の実施形態に係る圧力容器の概略の構成について説明する。 (Outline configuration of pressure vessel)
A schematic configuration of a pressure vessel according to an embodiment of the present invention will be described with reference to FIG.

図１には、本実施形態の圧力容器１０の端部が示されている。この圧力容器１０は、燃料電池自動車に搭載されたタンクモジュールの一部を構成している。なお、タンクモジュールは、後述する締結部１８等を介して互いに接続された複数の圧力容器１０を含んで構成されている。 FIG. 1 shows the end of the pressure vessel 10 of this embodiment. This pressure vessel 10 constitutes a part of a tank module mounted on a fuel cell vehicle. The tank module includes a plurality of pressure vessels 10 that are connected to each other via fastening portions 18 and the like, which will be described later.

圧力容器１０は、内部に気体の水素が充填されるライナ１２と、ライナ１２を外側から覆う補強部としての補強層１４と、を含んで構成されている。 The pressure vessel 10 includes a liner 12 filled with gaseous hydrogen, and a reinforcing layer 14 serving as a reinforcing portion that covers the liner 12 from the outside.

ライナ１２は、ナイロン等の樹脂材料を用いて形成されている。このライナ１２は、両端が開放された略円筒状に形成されている。ここで、ライナ１２の長手方向（矢印Ｚ方向）の中間部において内径及び外径が一定とされた円筒状の部分を胴体部１２Ａと呼ぶ。また、ライナ１２における長手方向（矢印Ｚ方向）の両側部分を構成し胴体部１２Ａとは反対側に向かうにつれて次第に窄まる部分を肩部１２Ｂと呼ぶ。さらに、ライナ１２における長手方向（矢印Ｚ方向）の両端部を構成し胴体部１２Ａ及び肩部１２Ｂよりも内径及び外径が小径かつ略一定とされた円筒状の部分を小径端部１２Ｃと呼ぶ。 The liner 12 is formed using a resin material such as nylon. The liner 12 is formed in a substantially cylindrical shape with both ends opened. Here, a cylindrical portion having a constant inner diameter and outer diameter at an intermediate portion in the longitudinal direction (arrow Z direction) of the liner 12 is called a body portion 12A. Further, a shoulder portion 12B is a portion that constitutes both side portions of the liner 12 in the longitudinal direction (direction of arrow Z) and gradually narrows toward the side opposite to the body portion 12A. Furthermore, a cylindrical portion that constitutes both ends of the liner 12 in the longitudinal direction (the direction of the arrow Z) and has an inner diameter and an outer diameter that are substantially constant and smaller than those of the body portion 12A and the shoulder portion 12B is called a small-diameter end portion 12C. .

補強層１４は、繊維強化樹脂を用いて形成されている。なお、本実施形態では、繊維強化樹脂として炭素繊維強化樹脂（ＣＦＲＰ）が用いられている。そして、炭素繊維強化樹脂が、ライナ１２の外表面の全体に巻付けられることで、ライナ１２を外側から覆う補強層１４が形成されている。ここで、補強層１４の厚みは、ライナ１２の胴体部１２Ａ側から小径端部１２Ｃ側へ向かうにつれて厚くなっている。また、補強層１４においてライナ１２の小径端部１２Ｃと対応する部分の外径（後述する口金１６がかしめられる前の外径）は、ほぼ一体の外径となっている。 The reinforcing layer 14 is formed using fiber reinforced resin. In this embodiment, carbon fiber reinforced resin (CFRP) is used as the fiber reinforced resin. A carbon fiber reinforced resin is wrapped around the entire outer surface of the liner 12 to form a reinforcing layer 14 that covers the liner 12 from the outside. Here, the thickness of the reinforcing layer 14 increases from the body portion 12A side of the liner 12 toward the small diameter end portion 12C side. Further, the outer diameter of the portion of the reinforcing layer 14 corresponding to the small-diameter end portion 12C of the liner 12 (the outer diameter before the mouthpiece 16, which will be described later, is crimped) is substantially the same outer diameter.

ここで、補強層１４に覆われたライナ１２の小径端部１２Ｃには、口金１６及び締結部１８が取付けられている。これにより、ライナ１２の一方側の小径端部１２Ｃが締結部１８によって閉止されると共に、図示しないライナ１２の他方側の小径端部が締結部を介して他の圧力容器１０に接続されている。なお、図１においては、ライナ１２において締結部１８によって閉止された側の小径端部１２Ｃを示している。 Here, a mouthpiece 16 and a fastening portion 18 are attached to the small-diameter end portion 12C of the liner 12 covered with the reinforcing layer 14 . As a result, one small-diameter end portion 12C of the liner 12 is closed by the fastening portion 18, and the other small-diameter end portion (not shown) of the liner 12 is connected to the other pressure vessel 10 via the fastening portion. . 1 shows the small-diameter end portion 12C of the liner 12 that is closed by the fastening portion 18. As shown in FIG.

（口金の詳細な構成）
次に、図２～図４を用いて、口金１６の詳細な構成について説明する。 (Detailed configuration of base)
Next, a detailed configuration of the base 16 will be described with reference to FIGS. 2 to 4. FIG.

図２に示されるように、口金１６は、金属材料を用いて環状（筒状）に形成されている。ここで、口金１６の軸方向一方側（ライナ１２の長手方向一方側）を矢印Ｚで示し、口金１６の径方向外側を矢印Ｒで示し、口金１６の周方向一方側を矢印Ｃで示す。 As shown in FIG. 2, the base 16 is formed in an annular (cylindrical) shape using a metal material. Here, an arrow Z indicates one axial side of the mouthpiece 16 (one longitudinal side of the liner 12), an arrow R indicates a radial outer side of the mouthpiece 16, and an arrow C indicates one circumferential side of the mouthpiece 16.

口金１６は、周方向に間隔をあけて配置された複数の（本実施形態では８つの）口金本体部２０と、周方向に隣合う口金本体部２０を周方向につなぐ変形部としての桟部２２と、を備えている。 The mouthpiece 16 includes a plurality of mouthpiece main bodies 20 (eight in this embodiment) arranged at intervals in the circumferential direction, and crosspieces as deformed parts that connect the mouthpiece main bodies 20 adjacent in the circumferential direction in the circumferential direction. 22 and.

口金本体部２０は、径方向を厚み方向として軸方向に延在すると共に軸方向から見て径方向内側へ湾曲された板状に形成されている。なお、口金本体部２０の軸方向他方側の端部は、径方向外側へ屈曲されたフランジ部２４とされている。 The mouthpiece main body 20 is formed in a plate shape extending in the axial direction with the radial direction as the thickness direction and curved radially inward when viewed from the axial direction. The other axial end of the mouthpiece main body 20 is a flange 24 bent radially outward.

桟部２２は、径方向を厚み方向として軸方向に延在すると共に軸方向から見て径方向外側へ湾曲された板状に形成されている。この桟部２２の厚みは、口金本体部２０の厚みよりも薄い寸法に設定されている。また、桟部２２の軸方向への長さは、口金本体部２０の軸方向への長さと対応する長さに設定されている。そして、桟部２２は、周方向に隣合う一の口金本体部２０の径方向の中間部と他の口金本体部２０の径方向の中間部とを周方向につないでいる。 The crosspiece 22 is formed in a plate shape extending in the axial direction with the radial direction as the thickness direction and curved outward in the radial direction when viewed from the axial direction. The thickness of the crosspiece 22 is set to be smaller than the thickness of the mouthpiece main body 20 . Further, the axial length of the bridge portion 22 is set to correspond to the axial length of the mouthpiece body portion 20 . The crosspiece 22 circumferentially connects the radially intermediate portion of one mouthpiece main body portion 20 and the radially intermediate portion of the other mouthpiece body portion 20 adjacent in the circumferential direction.

口金本体部２０の外周部には、後述する締結部１８が螺合されるネジ溝２６が周方向及び軸方向に沿って形成されている。また、口金本体部２０の内周部には、後に詳述するように口金１６がかしめられた際に補強層１４の外周部に食い込む係止部としての複数の係止爪２８が形成されている。 A screw groove 26 into which a fastening portion 18 (to be described later) is screwed is formed in the outer peripheral portion of the mouthpiece body portion 20 along the circumferential direction and the axial direction. In addition, a plurality of locking claws 28 are formed on the inner peripheral portion of the mouthpiece main body 20 as a locking portion that bites into the outer peripheral portion of the reinforcing layer 14 when the mouthpiece 16 is crimped as will be described in detail later. there is

図３及び図４に示されるように、複数の係止爪２８は、軸方向及び径方向に沿って切断した断面視で突出方向の先端側（径方向内側）が尖った鋸刃状に形成されている。また、本実施形態では、係止爪２８におけるライナ１２の胴体部１２Ａ側の面２８Ａが、径方向外側へ向かうにつれて胴体部１２Ａ側へ傾斜している。さらに、係止爪２８におけるライナ１２の胴体部１２Ａとは反対側の面２８Ｂが、径方向に沿う垂直面となっている。ここで、本実施形態では、複数の係止爪２８が、当該複数の係止爪２８の先端２８Ｃがクロスハッチングを描くように配設されている。換言すると、複数の係止爪２８が形成された部分がローレット形状となっている。これにより、複数の係止爪２８が、補強層１４を構成する繊維強化樹脂の内部の繊維に沿ってのびるようになっている。すなわち、互いに交差する２つの係止爪２８のなす角度θが、補強層１４を構成する繊維強化樹脂の内部の繊維角度と一致している。なお、図４においては繊維３０を二点鎖線で示し、図３においては繊維３０（図４参照）の方向を符号Ｐで示している。 As shown in FIGS. 3 and 4, the plurality of locking claws 28 are formed in a serrated shape with a sharp tip end side (radial direction inner side) in the projecting direction in a cross-sectional view cut along the axial direction and the radial direction. It is Further, in the present embodiment, the surface 28A of the locking claw 28 on the side of the body portion 12A of the liner 12 is inclined toward the body portion 12A toward the outside in the radial direction. Further, a surface 28B of the engaging claw 28 on the side opposite to the body portion 12A of the liner 12 is a vertical surface along the radial direction. Here, in the present embodiment, the plurality of locking claws 28 are arranged so that the tips 28C of the plurality of locking claws 28 draw cross hatching. In other words, the portion where the plurality of locking claws 28 are formed has a knurled shape. Thereby, the plurality of locking claws 28 extend along the fibers inside the fiber-reinforced resin forming the reinforcing layer 14 . That is, the angle θ formed by the two intersecting locking claws 28 matches the internal fiber angle of the fiber-reinforced resin forming the reinforcing layer 14 . 4, the fiber 30 is indicated by a two-dot chain line, and the direction of the fiber 30 (see FIG. 4) is indicated by P in FIG.

（口金の取付工程）
次に、図１、図５～図８を用いて、口金１６等をライナ１２の小径端部１２Ｃに取付ける工程について説明する。 (Mounting process of mouthpiece)
Next, the process of attaching the mouthpiece 16 and the like to the small-diameter end portion 12C of the liner 12 will be described with reference to FIGS. 1 and 5 to 8. FIG.

先ず、図５及び図６に示されるように、ライナ１２の小径端部１２Ｃの外周側（かつ補強層１４の外周側）に口金１６を配置させる（口金配置工程）。これにより、口金１６の各々の口金本体部２０に形成された複数の係止爪２８の先端２８Ｃが補強層１４の外周面と近接して配置される。 First, as shown in FIGS. 5 and 6, the die 16 is arranged on the outer peripheral side of the small-diameter end portion 12C of the liner 12 (and the outer peripheral side of the reinforcing layer 14) (a die placement step). As a result, the tips 28C of the plurality of locking claws 28 formed on the mouthpiece main body 20 of each mouthpiece 16 are arranged close to the outer peripheral surface of the reinforcing layer 14 .

次に、図７及び図８に示されるように、口金１６をかしめることにより、当該口金１６を縮径させる（口金かしめ工程）。詳述すると、周方向に隣合う口金本体部２０を周方向につなぐ各々の桟部２２を変形させる（軸方向から見て径方向外側へＵ字状に湾曲させるように変形させる）ことにより、各々の口金本体部２０を径方向内側へ移動させる。これにより、複数の係止爪２８が補強層１４（繊維強化樹脂の樹脂部分）に食い込む。なお、補強層１４がＲＴＭ（樹脂含浸成形）により含浸硬化する場合は、変形された桟部２２にシール効果を持たせることもできる。 Next, as shown in FIGS. 7 and 8, the mouthpiece 16 is crimped to reduce the diameter of the mouthpiece 16 (a mouthpiece crimping step). More specifically, by deforming each of the crosspieces 22 that connect the circumferentially adjacent mouthpiece main bodies 20 in the circumferential direction (deforming them so as to bend them radially outward in a U-shape when viewed from the axial direction), Each mouthpiece body 20 is moved radially inward. As a result, the plurality of locking claws 28 bite into the reinforcing layer 14 (resin portion of fiber reinforced resin). When the reinforcing layer 14 is impregnated and hardened by RTM (resin impregnation molding), the deformed crosspiece 22 can have a sealing effect.

以上の工程を経て、口金１６がライナ１２の小径端部１２Ｃに取付けられる。 The mouthpiece 16 is attached to the small-diameter end portion 12C of the liner 12 through the above steps.

また、口金１６がかしめられた状態（口金かしめ工程が完了した状態）では、図１に示されるように、各々の口金本体部２０の外周部に形成されたネジ溝２６が雄ネジ状の雄ネジ部２６Ａを形成する。そして、この雄ネジ部２６Ａに、締結部１８に形成された雌ネジ部１８Ａを螺合させることで、締結部１８をライナ１２の小径端部１２Ｃに取付ける（締結部取付工程）。この状態では、口金１６がライナ１２内の水素に触れない位置に配置される。 Further, in the state where the mouthpiece 16 is crimped (the state where the mouthpiece crimping process is completed), as shown in FIG. A screw portion 26A is formed. Then, the fastening portion 18 is attached to the small-diameter end portion 12C of the liner 12 by screwing the male thread portion 26A into the female thread portion 18A formed on the fastening portion 18 (fastening portion attaching step). In this state, the mouthpiece 16 is arranged in the liner 12 at a position where it does not come into contact with hydrogen.

（本実施形態の作用並びに効果）
次に、本実施形態の作用並びに効果について説明する。 (Action and effect of the present embodiment)
Next, the operation and effects of this embodiment will be described.

以上説明した本実施形態の圧力容器１０では、上記かしめ工程（図６及び図８等参照）を経ることで、口金１６の各々の口金本体部２０が径方向内側へ移動して、複数の係止爪２８が補強層１４（繊維強化樹脂の樹脂部分）に食い込むようになっている。当該構成では、複数の係止爪２８を補強層１４に食い込ませるために口金１６を分割構造とすることが不要となる。その結果、口金１６を構成する部品点数が削減され、圧力容器１０の製造コスト等を削減することができる。 In the pressure vessel 10 of the present embodiment described above, through the crimping process (see FIGS. 6 and 8, etc.), the mouthpiece main bodies 20 of the mouthpieces 16 are moved radially inward to form a plurality of engagements. The retaining claw 28 is adapted to bite into the reinforcing layer 14 (resin portion of fiber reinforced resin). With this configuration, it is not necessary to divide the mouthpiece 16 in order to allow the plurality of locking claws 28 to bite into the reinforcing layer 14 . As a result, the number of parts constituting the mouthpiece 16 can be reduced, and the manufacturing cost of the pressure vessel 10 can be reduced.

また、本実施形態では、口金１６がかしめられた状態で、各々の口金本体部２０の外周部に形成されたネジ溝２６が雄ネジ状の雄ネジ部２６Ａを形成するようになっている。これにより、圧力容器１０を他の圧力容器１０等に接続するための締結部１８等を容易に取付けることができる。また、口金１６をダイキャストやＭＩＭ（金属射出成形）のような工法で製造することにより、機械加工レス化を図ることができる。 Further, in this embodiment, when the mouthpiece 16 is crimped, the thread groove 26 formed in the outer peripheral portion of each mouthpiece main body portion 20 forms a male threaded portion 26A. This makes it possible to easily attach the fastening portion 18 or the like for connecting the pressure vessel 10 to another pressure vessel 10 or the like. Further, by manufacturing the mouthpiece 16 by a method such as die casting or MIM (metal injection molding), machining can be eliminated.

さらに、本実施形態では、口金１６の各々の口金本体部２０に形成された複数の係止爪２８が、補強層１４を構成する繊維強化樹脂の内部の繊維に沿ってのびるようになっている。これにより、複数の係止爪２８が補強層１４（繊維強化樹脂の樹脂部分）に食い込む際に、当該複数の係止爪２８が、補強層１４内の繊維を押し退けるようにして補強層１４（繊維強化樹脂の樹脂部分）に食い込む。これにより、複数の係止爪２８が補強層１４に食い込む際に（補強層１４を変形させる際に）、補強層１４を構成する繊維強化樹脂の内部の繊維が損傷することを抑制することができる。 Furthermore, in the present embodiment, a plurality of locking claws 28 formed on the mouthpiece main body 20 of each mouthpiece 16 extend along the fibers inside the fiber-reinforced resin forming the reinforcing layer 14. . As a result, when the plurality of locking claws 28 bite into the reinforcing layer 14 (the resin portion of the fiber-reinforced resin), the plurality of locking claws 28 push aside the fibers in the reinforcing layer 14 so that the reinforcing layer 14 ( It bites into the resin part of the fiber reinforced resin). As a result, when the plurality of locking claws 28 bite into the reinforcing layer 14 (when deforming the reinforcing layer 14), damage to the fibers inside the fiber-reinforced resin forming the reinforcing layer 14 can be suppressed. can.

また、本実施形態では、係止爪２８におけるライナ１２の胴体部１２Ａとは反対側の面２８Ｂが、径方向に沿う垂直面となっている。この垂直面に沿って補強層１４内の繊維が整列されることにより、口金１６を補強層１４に強固に係止させることができる。 Further, in the present embodiment, the surface 28B of the locking claw 28 on the side opposite to the body portion 12A of the liner 12 is a vertical surface along the radial direction. By aligning the fibers in the reinforcing layer 14 along this vertical plane, the nozzle 16 can be firmly locked to the reinforcing layer 14 .

以上、本発明の一実施形態について説明したが、本発明は、上記に限定されるものでなく、その主旨を逸脱しない範囲内において上記以外にも種々変形して実施することが可能であることは勿論である。 Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and can be implemented in various modifications other than the above without departing from the spirit of the present invention. is of course.

１０ 圧力容器
１２ ライナ
１４ 補強層（補強部）
１６ 口金
２８ 係止爪（係止部）
３０ 繊維
10 pressure vessel 12 liner 14 reinforcement layer (reinforcement part)
16 Base 28 Locking pawl (locking portion)
30 fibers

Claims (1)

内部に気体が充填されるライナと、
繊維強化樹脂を用いて前記ライナの外表面に接した状態で形成され、前記ライナを外側から覆う補強部と、
前記補強部を構成する繊維強化樹脂の内部の繊維に沿ってのびる係止部を有し、該係止部が前記補強部を構成する繊維強化樹脂を変形させた状態で前記ライナに取付けられた口金と、
を備え、
前記口金は、環状に形成され、
前記口金は、周方向に間隔をあけて配置された複数の口金本体部と、周方向に隣合う前記口金本体部を周方向につなぐ変形部と、を備えており、
前記口金本体部の内周部には前記係止部が形成され、前記変形部が変形された状態で、前記係止部が前記補強部の外周部に食い込んでいる圧力容器。 a liner filled with gas;
a reinforcing portion formed in contact with the outer surface of the liner using a fiber-reinforced resin and covering the liner from the outside;
An engaging portion extending along the fibers inside the fiber reinforced resin constituting the reinforcing portion is provided, and the engaging portion is attached to the liner in a state in which the fiber reinforced resin constituting the reinforcing portion is deformed. a base;
with
The mouthpiece is formed in an annular shape,
The mouthpiece includes a plurality of mouthpiece body portions arranged at intervals in the circumferential direction, and a deformation portion that connects the mouthpiece body portions that are adjacent in the circumferential direction in the circumferential direction,
A pressure vessel in which the engaging portion is formed on the inner peripheral portion of the mouthpiece main body portion, and the engaging portion bites into the outer peripheral portion of the reinforcing portion in a state where the deformation portion is deformed .
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