JP2005036918A - High pressure tank using highly rigid fiber and its manufacturing method - Google Patents

High pressure tank using highly rigid fiber and its manufacturing method Download PDF

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Publication number
JP2005036918A
JP2005036918A JP2003275438A JP2003275438A JP2005036918A JP 2005036918 A JP2005036918 A JP 2005036918A JP 2003275438 A JP2003275438 A JP 2003275438A JP 2003275438 A JP2003275438 A JP 2003275438A JP 2005036918 A JP2005036918 A JP 2005036918A
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fiber layer
fiber
liner
pressure tank
gpa
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JP2003275438A
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JP3534743B1 (en
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Yoshiki Sakaguchi
善樹 阪口
Naoki Sakaguchi
直樹 阪口
Takeshi Yamamoto
猛 山本
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Samtech Corp
Samtech International Inc
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Samtech Corp
Samtech International Inc
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Priority to JP2003275438A priority Critical patent/JP3534743B1/en
Priority to DE10345159A priority patent/DE10345159B4/en
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Publication of JP3534743B1 publication Critical patent/JP3534743B1/en
Publication of JP2005036918A publication Critical patent/JP2005036918A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F17C1/04—Protecting sheathings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F17C1/04—Protecting sheathings
    • F17C1/06—Protecting sheathings built-up from wound-on bands or filamentary material, e.g. wires
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/058—Size portable (<30 l)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0614—Single wall
    • F17C2203/0619—Single wall with two layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0614—Single wall
    • F17C2203/0624—Single wall with four or more layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0648—Alloys or compositions of metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0658—Synthetics
    • F17C2203/0663—Synthetics in form of fibers or filaments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0305—Bosses, e.g. boss collars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0388—Arrangement of valves, regulators, filters
    • F17C2205/0394—Arrangement of valves, regulators, filters in direct contact with the pressure vessel
    • F17C2205/0397—Arrangement of valves, regulators, filters in direct contact with the pressure vessel on both sides of the pressure vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/21—Shaping processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/21—Shaping processes
    • F17C2209/2154—Winding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/224—Press-fitting; Shrink-fitting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/232—Manufacturing of particular parts or at special locations of walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/012—Hydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/012—Reducing weight
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/018—Adapting dimensions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0184—Fuel cells
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high pressure tank having a smaller size, a lighter weight and superior pressure resistance. <P>SOLUTION: A reinforcing fiber layer 23 for covering a liner 2 of the high pressure tank 1 at its outer peripheral face consists of an inside fiber layer 24 containing a highly rigid fiber having a Young's modulus of 350GPa and a rupture elongation of 0.7% or more, hoop wound and impregnated and hardened with a thermosetting resin, an intermediate fiber layer 25 containing a fiber having a Young's modulus of 280GPa or more and less than 350GPa and a rupture elongation of 1.5% or more and lese than 2.0%, helically wound and impregnated and hardened with a thermosetting resin, and an outside fiber layer 26 containing a fiber having a Young's modulus of 230GPa or more and less than 280GPa and a rupture elongation of 2.0% or more, helically wound at a high angle and impregnated and hardened with a thermosetting resin. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、自動車用水素燃料タンク等に適用される高剛性繊維を用いた高圧タンク及びその製造方法に関するものである。   The present invention relates to a high-pressure tank using high-rigidity fibers applied to a hydrogen fuel tank for automobiles and the like, and a method for manufacturing the same.

この種の高圧タンクは、アルミニウム合金等の金属製ライナー外周面を炭素繊維等からなる補強繊維層で被覆して構成されている。この補強繊維層は、フィラメントワインディング法により、エポキシ樹脂等の熱硬化性樹脂を含浸させた炭素繊維等の繊維をライナー外周面に巻き付け、上記熱硬化性樹脂を硬化させることによって構成される（例えば、特許文献１）。
特開平１０−２９２８９９号公報（第３頁、図１，４） This type of high-pressure tank is configured by coating the outer peripheral surface of a metal liner such as an aluminum alloy with a reinforcing fiber layer made of carbon fiber or the like. This reinforcing fiber layer is configured by winding a fiber such as carbon fiber impregnated with a thermosetting resin such as an epoxy resin around the outer peripheral surface of the liner by a filament winding method and curing the thermosetting resin (for example, Patent Document 1).
JP-A-10-292899 (page 3, FIGS. 1 and 4)

ところで、上記の特許文献１の高圧タンクは、高圧タンクとはいっても、精々２０ＭＰａ程度のガス充填圧クラスであり、これを例えば自動車の水素燃料タンクとして適用した場合、１回のガス充填で走行できる距離は実用レベルに達していない。因みに、容量１００リットルの高圧タンクに水素ガスを２５ＭＰａ充填した場合、走行距離は約１８０ｋｍで、実用レベルである５００ｋｍにはほど遠いのが現実である。   By the way, although the high-pressure tank of the above-mentioned patent document 1 is a high-pressure tank, it is a gas filling pressure class of about 20 MPa, and when this is applied as a hydrogen fuel tank of an automobile, for example, it travels with one gas filling. The distance that can be achieved has not reached the practical level. Incidentally, when a high pressure tank with a capacity of 100 liters is filled with 25 MPa of hydrogen gas, the traveling distance is about 180 km, which is far from the practical level of 500 km.

そこで、１回のガス充填で走行距離を長くするには、タンク容量を大きくするか、あるいはガス充填圧を高くする必要がある。   Therefore, in order to increase the travel distance with one gas filling, it is necessary to increase the tank capacity or increase the gas filling pressure.

しかし、タンク容量を大きくすると積載重量が増大して好ましくなく、また、占有空間が大きくなるため、設置スペースに限界がある自動車には不向きである。   However, if the tank capacity is increased, the loading weight increases, which is not preferable, and the occupied space increases, which is not suitable for an automobile having a limited installation space.

一方、ガス充填圧を高めるには、タンク本体を構成するライナーの厚みを厚くする必要があるが、この場合も、積載重量が増大するため好ましくない。   On the other hand, in order to increase the gas filling pressure, it is necessary to increase the thickness of the liner constituting the tank body, but this is also not preferable because the load weight increases.

この発明はかかる点に鑑みてなされたものであり、その目的とするところは、小型で軽くしかも耐圧性に優れた高圧タンクを開発することである。   The present invention has been made in view of this point, and an object of the present invention is to develop a high-pressure tank that is small, light and excellent in pressure resistance.

上記の目的を達成するため、この発明は、ライナーの外周面を被覆する補強繊維層を強化したことを特徴とする。   In order to achieve the above object, the present invention is characterized in that the reinforcing fiber layer covering the outer peripheral surface of the liner is reinforced.

具体的には、この発明は、補強繊維層に高剛性繊維を用いた高圧タンク及びその製造方法を対象とし、次のような解決手段を講じた。   Specifically, the present invention is directed to a high-pressure tank using a high-rigidity fiber as a reinforcing fiber layer and a manufacturing method thereof, and has taken the following solution.

すなわち、請求項１及び２に記載の発明は、前者の高剛性繊維を用いた高圧タンクに関するものであり、そのうち、請求項１に記載の発明は、アルミニウム合金製の短筒状ブランク材を塑性変形させて筒状胴部の一端に椀状鏡部を介してガス取出筒部が突設されて構成され、このガス取出筒部は上記胴部の３倍以上の厚みに設定され、上記鏡部は胴部からガス取出筒部に行くに従って胴部の厚みからガス取出筒部の厚みに漸次増大していて３５〜７５ＭＰａの高圧ガスが充填される筒状の金属製ライナーと、上記ライナーのガス取出筒部から鏡部にかけての外周に嵌着された金属製の筒状補強カラーと、上記ライナー外周面を被覆する補強繊維層とを備え、上記補強繊維層は、ヤング率３５０ＧＰａ以上で破断時の伸び０．７％以上の高剛性繊維をフープ巻きしてなり熱硬化性樹脂が含浸硬化された内側繊維層と、ヤング率２８０ＧＰａ以上３５０ＧＰａ未満で破断時の伸び１．５％以上２．０％未満の繊維をヘリカル巻きしてなり熱硬化性樹脂が含浸硬化された中間繊維層と、ヤング率２３０ＧＰａ以上２８０ＧＰａ未満で破断時の伸び２．０％以上の繊維をライナー中心線に対する繊維角度が上記中間繊維層の繊維角度よりも大きくなるようにハイアングルヘリカル巻きしてなり熱硬化性樹脂が含浸硬化された外側繊維層とで構成され、上記補強繊維層を構成する各繊維層は、繊維を偏平に集束して熱硬化性樹脂を含浸させた繊維テープをプリプレグ状態で巻き付けて上記熱硬化性樹脂を硬化させて構成されていることを特徴とする。 That is, the invention described in claims 1 and 2 relates to the former high-pressure tank using the high-rigidity fiber, and among them, the invention described in claim 1 relates to the short cylindrical blank made of aluminum alloy as a plastic material. A gas extraction cylinder part is formed by projecting at one end of the cylindrical body part through a bowl-shaped mirror part, and the gas extraction cylinder part is set to a thickness three times or more that of the body part. The cylindrical portion of the liner gradually increases from the thickness of the barrel portion to the thickness of the gas extraction tube portion as it goes from the barrel portion to the gas extraction tube portion, and is filled with high-pressure gas of 35 to 75 MPa ; A metal cylindrical reinforcing collar fitted on the outer periphery from the gas extraction tube portion to the mirror portion and a reinforcing fiber layer covering the outer peripheral surface of the liner, the reinforcing fiber layer breaking at a Young's modulus of 350 GPa or more High rigidity with an elongation of 0.7% or more An inner fiber layer in which a fiber is hoop-wrapped and impregnated and cured with a thermosetting resin, and a fiber having a Young's modulus of 280 GPa to less than 350 GPa and an elongation at break of 1.5% to less than 2.0% is helically wound. An intermediate fiber layer impregnated and cured with a thermosetting resin, and a fiber having a Young's modulus of 230 GPa or more and less than 280 GPa and an elongation at break of 2.0% or more, the fiber angle with respect to the liner center line is larger than the fiber angle of the intermediate fiber layer. Each of the fiber layers constituting the reinforcing fiber layer is formed by concentrating the fibers flatly and thermosetting resin. It is characterized in that the thermosetting resin is cured by winding a fiber tape impregnated with prepreg in a prepreg state .

上記の構成により、請求項１に記載の発明では、ヤング率３５０ＧＰａ以上で破断時の伸び０．７％以上の高剛性繊維からなるフープ巻きの内側繊維層は、ライナーに３５〜７５ＭＰａの高圧が加わっても伸び難いため、この高剛性繊維からなる内側繊維層がガス充填圧によってライナーに作用するライナー径方向の引張応力に十分に抗し得てライナーの耐疲労性が向上する。この伸び難い高剛性繊維は反面、耐衝撃性に劣るが、その外側のヤング率２３０ＧＰａ以上２８０ＧＰａ未満で破断時の伸び２．０％以上の繊維からなるハイアングルヘリカル巻きの外側繊維層により、耐衝撃性が確保される。さらに、ヤング率２８０ＧＰａ以上３５０ＧＰａ未満で破断時の伸び１．５％以上２．０％未満の繊維からなるヘリカル巻きの中間繊維層により、ライナーの中心線方向の耐力が向上する。しかも、このヘリカル巻きの中間繊維層は、フープ巻きの内側繊維層に比べて荷重分担が約半分でよいので、それほど高剛性は要求されず、巻き易さとコスト面を考慮して内側繊維層と外側繊維層との中間の剛性に設定しているため、必要以上に層厚を厚くしなくてよい。したがって、タンク容量が小さくかつライナーの厚みが薄くても、３５〜７５ＭＰａの高圧ガスの充填が可能になり、小型で軽くしかも耐圧性に優れた高圧タンクが実現される。   According to the above configuration, in the invention according to claim 1, the inner fiber layer of the hoop winding composed of high-rigidity fibers having a Young's modulus of 350 GPa or more and an elongation at break of 0.7% or more has a high pressure of 35 to 75 MPa on the liner. Since it is difficult to stretch even if it is added, the inner fiber layer made of this highly rigid fiber can sufficiently resist the tensile stress in the radial direction of the liner acting on the liner by the gas filling pressure, and the fatigue resistance of the liner is improved. Although this highly rigid fiber that is difficult to stretch is inferior in impact resistance, the outer fiber layer of the high-angle helical winding made of fibers having a Young's modulus of 230 GPa or more and less than 280 GPa and an elongation of 2.0% or more at break is excellent. Impact properties are ensured. Further, the helically wound intermediate fiber layer made of fibers having a Young's modulus of 280 GPa or more and less than 350 GPa and an elongation at break of 1.5% or more and less than 2.0% improves the proof stress in the center line direction of the liner. In addition, the helically wound intermediate fiber layer only requires about half of the load sharing compared to the hoop-wrapped inner fiber layer, so that high rigidity is not required, and considering the ease of winding and cost, the inner fiber layer Since the rigidity is set to an intermediate level with the outer fiber layer, the layer thickness does not need to be increased more than necessary. Therefore, even if the tank capacity is small and the liner is thin, it is possible to fill the high-pressure gas of 35 to 75 MPa, and a high-pressure tank that is small, light and excellent in pressure resistance is realized.

また、一般に、高剛性繊維は硬いため、紐状の形態では滑り易くてライナーに巻き難く、弛みが生じてライナーに作用する引張応力を全繊維に均等に分配し辛いが、この発明では、特に、高剛性繊維を偏平なテープにして用いるため、ライナーに沿わせ易く、ライナーに弛みなく巻き付けることが可能で上記引張応力が全繊維に均等に分配され、ライナーの耐疲労性向上が容易に実現される。 In general, since the high-rigidity fibers are stiff, they are slippery and difficult to wind around the liner in the string-like form, and it is difficult to evenly distribute the tensile stress acting on the liner due to the occurrence of slack. The high-strength fiber is used as a flat tape, so it can be easily applied to the liner and can be wound around the liner without any slack. The tensile stress is evenly distributed to all the fibers, making it easy to improve the fatigue resistance of the liner. Is done.

さらに、ガス取出筒部が胴部の３倍以上の厚みに設定され、そこから鏡部が漸次薄くなって胴部に続いているため、上記ガス取出筒部及び鏡部の強度が確保され、上述の補強繊維層によるライナーの耐疲労性向上及び耐衝撃性確保と相俟って、３５〜７５ＭＰａの高圧に十分に耐え得る高圧タンクとなる。また、上記胴部が薄くてもガス取出筒部及び鏡部が厚くなって強度が確保されるため、胴部が薄い分だけ高圧タンク全体の重量が軽減し、かつ材料費もあまり掛からない。 Furthermore , since the gas extraction cylinder part is set to a thickness of 3 times or more than the trunk part, and the mirror part gradually becomes thinner from there and continues to the trunk part, the strength of the gas extraction cylinder part and the mirror part is ensured, Combined with the improvement of fatigue resistance of the liner and the securing of impact resistance by the reinforcing fiber layer, the high-pressure tank can sufficiently withstand a high pressure of 35 to 75 MPa. Further, even if the body portion is thin, the gas extraction tube portion and the mirror portion are thickened to ensure the strength. Therefore, the weight of the entire high-pressure tank is reduced by the thin body portion, and the material cost is not so high.

加えて、応力が集中し易いガス取出筒部及びその近傍の鏡部の実質的な厚みが補強カラーの厚みにより増大して当該箇所の強度がさらに確保され、３５〜７５ＭＰａの高圧に一層耐え得る高圧タンクとなる。また、補強カラーがライナー全体ではなく、応力が集中し易い鏡部及びガス取出筒部にだけ部分的に嵌着されているため、高圧タンクの重量がそれほど増加せず軽量化が図られるとともに、加工の簡易化、低価格化が図られる。 In addition , the substantial thickness of the gas extraction tube portion where stress tends to concentrate and the mirror portion in the vicinity thereof is increased by the thickness of the reinforcing collar, and the strength of the portion is further ensured, so that it can withstand a high pressure of 35 to 75 MPa. It becomes a high-pressure tank. In addition, the reinforcing collar is not the entire liner, but is partially fitted only to the mirror part and the gas extraction cylinder part where stress is likely to concentrate, so the weight of the high-pressure tank does not increase so much and the weight can be reduced. Simplification of processing and cost reduction are achieved.

請求項２に記載の発明は、請求項１に記載の発明において、補強カラーは、ガス取出筒部に嵌着される筒部と、この筒部の一端から外側方に張り出す張出部とからなり、この張出部裏面には、リング状膨出部が膨出して形成され、一方、鏡部のガス取出筒部との境目近傍における外周には、上記補強カラーを上記ライナーのガス取出筒部から鏡部にかけての外周に嵌着した状態で、上記膨出部が嵌入するリング状嵌合凹部が形成されていることを特徴とする。 According to a second aspect of the present invention, in the first aspect of the invention, the reinforcing collar includes a cylindrical portion that is fitted to the gas extraction cylindrical portion, and an overhang portion that projects outward from one end of the cylindrical portion. A ring-shaped bulge is formed on the back surface of the bulge. On the other hand, the reinforcement collar is disposed on the outer periphery in the vicinity of the boundary between the mirror and the gas extraction tube. A ring-shaped fitting concave portion into which the bulging portion is fitted is formed in a state of fitting on the outer periphery from the tube portion to the mirror portion.

上記の構成により、請求項２に記載の発明では、補強カラーの膨出部がライナーの嵌合凹部に嵌入することで、両者の嵌合状態が確実になる。また、上記膨出部があることで当該部分の補強カラーの厚みが増大し、その分だけ強度アップとなる。 With the above configuration, in the invention according to the second aspect , the bulging portion of the reinforcing collar is fitted into the fitting concave portion of the liner, so that the fitting state of both is ensured. In addition, the presence of the bulging portion increases the thickness of the reinforcing collar of the portion, and the strength is increased accordingly.

請求項３及び４に記載の発明は、後者の高剛性繊維を用いた高圧タンクの製造方法に関するものであり、そのうち、請求項３に記載の発明は、アルミニウム合金製の短筒状ブランク材を塑性変形させて筒状胴部の一端に椀状鏡部を介してガス取出筒部が突設されて構成され、このガス取出筒部は上記胴部の３倍以上の厚みに設定され、上記鏡部は胴部からガス取出筒部に行くに従って胴部の厚みからガス取出筒部の厚みに漸次増大し、かつ上記ガス取出筒部から鏡部にかけての外周に金属製の筒状補強カラーが嵌着されて３５〜７５ＭＰａの高圧ガスが充填される筒状の金属製ライナーを用意し、まず、ヤング率３５０ＧＰａ以上で破断時の伸び０．７％以上の高剛性繊維を偏平に集束して熱硬化性樹脂を含浸させた繊維テープをプリプレグ状態で上記ライナー外周面にフープ巻きして内側繊維層を形成し、次いで、ヤング率２８０ＧＰａ以上３５０ＧＰａ未満で破断時の伸び１．５％以上２．０％未満の繊維を偏平に集束して熱硬化性樹脂を含浸させた繊維テープをプリプレグ状態で上記内側繊維層外周面にヘリカル巻きして中間繊維層を形成し、その後、ヤング率２３０ＧＰａ以上２８０ＧＰａ未満で破断時の伸び２．０％以上の繊維を偏平に集束して熱硬化性樹脂を含浸させた繊維テープをプリプレグ状態で上記中間繊維層外周面にライナー中心線に対する繊維角度が上記中間繊維層の繊維角度よりも大きくなるようにハイアングルヘリカル巻きして外側繊維層を形成して、上記内側繊維層、中間繊維層及び外側繊維層で構成された補強繊維層により上記ライナー外周面を被覆し、しかる後、上記補強繊維層で被覆されたライナーを乾燥室に搬入して加熱し、補強繊維層に含浸している熱硬化性樹脂を硬化させることを特徴とする。 The invention described in claims 3 and 4 relates to a method for manufacturing a high-pressure tank using the latter high-rigidity fiber. Among them, the invention described in claim 3 is a short cylindrical blank made of aluminum alloy. It is configured to be plastically deformed to project a gas extraction cylinder part at one end of the cylindrical body part via a bowl-shaped mirror part, and this gas extraction cylinder part is set to a thickness three times or more of the body part, The mirror part gradually increases from the thickness of the barrel part to the thickness of the gas extraction cylinder part as it goes from the barrel part to the gas extraction cylinder part, and a metal cylindrical reinforcing collar is provided on the outer periphery from the gas extraction cylinder part to the mirror part. A cylindrical metal liner that is fitted and filled with a high pressure gas of 35 to 75 MPa is prepared. First, high-rigid fibers having a Young's modulus of 350 GPa or more and an elongation at break of 0.7% or more are focused flatly. Prepreg fiber tape impregnated with thermosetting resin State at and wound hoop on the liner outer circumferential surface to form an inner fiber layer, then flatly focus the elongation of 1.5% or more to 2.0% less than the fiber at break less than or Young's modulus 280 GPa 350 GPa heat A fiber tape impregnated with a curable resin is helically wound around the outer peripheral surface of the inner fiber layer in a prepreg state to form an intermediate fiber layer. Thereafter, the Young's modulus is 230 GPa or more and less than 280 GPa, and the elongation at break is 2.0% or more. A fiber tape in which the fibers are flattened and impregnated with a thermosetting resin is prepreged so that the fiber angle relative to the liner center line is larger than the fiber angle of the intermediate fiber layer on the outer peripheral surface of the intermediate fiber layer. The outer fiber layer is formed by helical winding, and the outer peripheral surface of the liner is covered with the reinforcing fiber layer composed of the inner fiber layer, the intermediate fiber layer, and the outer fiber layer. And, thereafter, the liner coated with the reinforcing fiber layer is heated by carried into the drying chamber, characterized in that curing the thermosetting resin is impregnated into the reinforcing fiber layer.

上記の構成により、請求項３に記載の発明では、繊維をまとめてテープ状の形態でライナーに巻き付けることから、巻付け作業が簡単に行われる。また、繊維をウェットワインディング法でライナー外周面に巻き付ける場合は、液状の熱硬化性樹脂が作業場に滴り落ちて作業環境が悪化するが、この発明では、熱硬化性樹脂がある程度硬化してプリプレグ状態（Ｂ状態）となった繊維テープをライナーに巻き付けるため、熱硬化性樹脂が作業場に滴り落ちず、作業環境が悪化しない。 With the above configuration, in the invention described in claim 3 , since the fibers are collectively wound around the liner in the form of a tape, the winding operation is easily performed. In addition, when the fiber is wound around the outer peripheral surface of the liner by the wet winding method, the liquid thermosetting resin drops on the work place and the working environment is deteriorated, but in this invention, the thermosetting resin is cured to some extent and is in a prepreg state. Since the fiber tape in the (B state) is wound around the liner, the thermosetting resin does not drip into the work place and the work environment does not deteriorate.

請求項４に記載の発明は、請求項３に記載の発明において、乾燥室に搬入されたライナーを内外から加熱することを特徴とする。 The invention according to claim 4 is the invention according to claim 3 , wherein the liner carried into the drying chamber is heated from inside and outside.

上記の構成により、請求項４に記載の発明では、補強繊維層の熱硬化性樹脂を外側からのみ加熱する場合には、熱硬化性樹脂は外側から内側へと順に硬化し、硬化に伴って収縮する。この際、内側の未硬化樹脂は外側の硬化樹脂から圧縮力を受け、上記内側の未硬化樹脂が絡まっている繊維に弛みが生ずる。このように、繊維に弛みが生ずると、ガス充填圧によってライナーに作用する引張応力を全繊維に均等に配分できず、早期破断に至るが、この発明では、補強繊維層の熱硬化性樹脂は、層内外両側からほぼ同時に硬化するため、内側の繊維に弛みが生ずる事態が極力回避され、引張応力が全繊維に均等に分配されて早期破断に至らない。 With the above configuration, in the invention according to claim 4, when the thermosetting resin of the reinforcing fiber layer is heated only from the outside, the thermosetting resin is sequentially cured from the outside to the inside, and accompanying the curing. Shrink. At this time, the inner uncured resin receives a compressive force from the outer cured resin, and the fibers entangled with the inner uncured resin are slackened. As described above, when the fibers are slack, the tensile stress acting on the liner due to the gas filling pressure cannot be evenly distributed to all the fibers, leading to early breakage.In this invention, the thermosetting resin of the reinforcing fiber layer is Since the layers are hardened almost simultaneously from both the inside and outside of the layer, the situation in which the inner fibers are loosened is avoided as much as possible, and the tensile stress is evenly distributed to all the fibers, so that early breakage does not occur.

請求項１に係る発明によれば、ヤング率３５０ＧＰａ以上で破断時の伸び０．７％以上の伸び難い高剛性繊維からなるフープ巻きの内側繊維層により、３５〜７５ＭＰａの高圧がライナーに掛かることによって生ずるライナー径方向の引張応力に十分に抗し得てライナーの耐疲労性を向上させることができる。また、高剛性繊維であるがために劣る耐衝撃性をその外側のヤング率２３０ＧＰａ以上２８０ＧＰａ未満で破断時の伸び２．０％以上の繊維からなるハイアングルヘリカル巻きの外側繊維層により補うことができる。さらに、ヤング率２８０ＧＰａ以上３５０ＧＰａ未満で破断時の伸び１．５％以上２．０％未満の繊維からなるヘリカル巻きの中間繊維層によりライナー中心線方向の耐力を層厚を必要以上に厚くしないで向上させることができる。したがって、タンク容量が小さくかつライナーの厚みが薄くて小型で軽量の３５〜７５ＭＰａの高圧ガスに耐え得る高圧タンクとすることができる。 According to the first aspect of the present invention, a high pressure of 35 to 75 MPa is applied to the liner by the inner fiber layer of the hoop winding made of a highly rigid fiber having a Young's modulus of 350 GPa or more and an elongation at break of 0.7% or more and hardly stretchable. It is possible to sufficiently resist the tensile stress in the liner radial direction caused by the above and improve the fatigue resistance of the liner. In addition, the impact resistance, which is inferior because it is a high-rigidity fiber, can be compensated by an outer fiber layer of a high-angle helical winding made of fibers having a Young's modulus of 230 GPa or more and less than 280 GPa and an elongation at break of 2.0% or more. it can. In addition, with a helically wound intermediate fiber layer composed of fibers with a Young's modulus of 280 GPa or more and less than 350 GPa and an elongation at break of 1.5% or more and less than 2.0%, the proof stress in the direction of the centerline of the liner should not be increased more than necessary. Can be improved. Therefore, a high-pressure tank having a small tank capacity and a thin liner and capable of withstanding a 35 to 75 MPa high-pressure gas having a small size and light weight can be obtained .

特に、硬くて巻き難い高剛性繊維を偏平なテープ状の形態として用いているので、繊維を弛みなくライナーに巻き付けて引張応力を全繊維に均等配分してライナーの耐疲労性を向上させることができる。 In particular, because of the use of high-rigidity fiber hardly wound hard and as flat tape-like form, that the tensile stress is wound around the slack without liner fibers evenly distributed in the total fiber improve fatigue resistance of liner Can do.

さらに、ガス取出筒部を円筒形の胴部の３倍以上の厚みに設定し、そこから椀状鏡部を漸次薄くして胴部に続かせているので、上記ガス取出筒部及び鏡部の強度を確保でき、３５〜７５ＭＰａの高圧に十分に耐え得る高圧タンクとすることができる。また、上記胴部が薄くてもガス取出筒部及び鏡部を厚くして強度を確保できるので、胴部が薄い分だけ高圧タンクを軽量化できるとともに、コストダウンを図ることができる。 Furthermore , since the gas extraction tube portion is set to a thickness three times or more that of the cylindrical body portion, and the bowl-shaped mirror portion is gradually made thinner from there, the gas extraction tube portion and the mirror portion are connected. And a high-pressure tank that can sufficiently withstand a high pressure of 35 to 75 MPa. In addition, even if the body portion is thin, the gas extraction tube portion and the mirror portion can be thickened to ensure strength. Therefore, the high-pressure tank can be reduced in weight by the thin body portion, and the cost can be reduced.

加えて、ライナーの応力が集中し易い鏡部及びガス取出筒部に補強カラーを嵌着したので、上記ガス取出筒部及びその近傍の鏡部の厚みを補強カラーの厚みで補って当該箇所を十分に強化して、３５〜７５ＭＰａの高圧に一段と耐え得る高圧タンクとすることができる。また、上記補強カラーをライナーに部分的に嵌着するだけなので、高圧タンクの軽量化、加工の簡易化及び低価格化を達成することができる。 In addition, since the reinforcement collar is fitted to the mirror part and the gas extraction cylinder part where the stress of the liner tends to concentrate, the thickness of the gas extraction cylinder part and the mirror part in the vicinity thereof is compensated by the thickness of the reinforcement collar, so By sufficiently strengthening, a high-pressure tank that can withstand a high pressure of 35 to 75 MPa can be obtained. Further, since the reinforcing collar is only partially fitted to the liner, the high-pressure tank can be reduced in weight, simplified in processing, and reduced in price.

請求項２に係る発明によれば、補強カラーの膨出部をライナーの嵌合凹部に嵌入させたので、両者を確実に嵌合させることができる。また、上記膨出部があることで当該部分の補強カラーの厚みを増大してその分だけ強度アップを図ることができる。 According to the invention which concerns on Claim 2 , since the bulging part of the reinforcement collar was fitted in the fitting recessed part of the liner, both can be reliably fitted. In addition, the presence of the bulging portion can increase the thickness of the reinforcing collar of the portion and increase the strength accordingly.

請求項３に係る発明によれば、繊維をまとめてテープ状の形態でライナーに巻き付けるので、巻付け作業を簡単に行うことができる。また、繊維に含浸する熱硬化性樹脂を液状ではなく硬化がある程度進行したプリプレグ状態にしているので、熱硬化性樹脂が作業場に滴下することによる作業環境の悪化を防止することができる。 According to the invention of claim 3 , since the fibers are collectively wound around the liner in a tape form, the winding operation can be easily performed. In addition, since the thermosetting resin impregnated in the fiber is not in a liquid state but in a prepreg state in which the curing has progressed to some extent, it is possible to prevent the working environment from being deteriorated due to the dripping of the thermosetting resin into the workplace.

請求項４に係る発明によれば、乾燥室でライナーを内外から加熱して、補強繊維層の熱硬化性樹脂の硬化を層内外両側からほぼ同時に進行させるので、内側の繊維を弛まないようにすることができ、引張応力を全繊維に均等分配して早期破断を防止することができる。 According to the invention of claim 4 , the liner is heated from inside and outside in the drying chamber, and the curing of the thermosetting resin of the reinforcing fiber layer proceeds from both inside and outside of the layer almost simultaneously, so that the inner fibers are not loosened. The tensile stress can be evenly distributed across all fibers to prevent premature breakage.

以下、この発明の実施の形態について図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（実施の形態１）
図１及び図２はこの発明の実施の形態１に係る高剛性繊維を用いた高圧タンク１を示す。この高圧タンク１は、水素ガス等の３５〜７５ＭＰａの高圧ガスが充填されるタンク本体であるライナー２を備え、このライナー２は、横断面円形の筒状胴部３の一端に椀状鏡部４を介して小径で横断面円形のガス取出筒部５が一体に突設され、このガス取出筒部５側から高圧ガスを高圧タンク１（ライナー２）内に充填したり、あるいは高圧タンク１（ライナー２）から取り出したりするようになっている。上記ガス取出筒部５にはネジ孔６が形成され、このネジ孔６にバルブ装置７が装着されている。このバルブ装置７は、図示しないが開閉バルブと減圧バルブとを備えたバルブ機構８がカプセル９内に収容されて構成され、フランジ１０を上記ガス取出筒部５の開口端に当接させて上記カプセル９（バルブ機構８）を高圧タンク１内に収容した内蔵タイプ、いわゆるインタンクバルブである。このバルブ装置７の高圧タンク１外には、高圧タンク１に低圧ガス配管を接続するための配管接続部１１が突設されている。一方、上記胴部３の他端にも、椀状鏡部１２を介して小径で横断面円形の筒部１３が一体に突設され、この筒部１３にもネジ孔１４が形成され、このネジ孔１４に高圧ガスに対する気密性を保持するための盲プラグ１５が装着され、これにより、ライナー２内に高圧ガスを収容する密閉された中空部１６が形成されている。 (Embodiment 1)
1 and 2 show a high-pressure tank 1 using high-rigidity fibers according to Embodiment 1 of the present invention. The high-pressure tank 1 includes a liner 2 that is a tank body filled with 35 to 75 MPa of high-pressure gas such as hydrogen gas. The liner 2 has a bowl-shaped mirror portion at one end of a cylindrical body 3 having a circular cross section. A gas extraction cylinder portion 5 having a small diameter and a circular cross section is integrally provided through 4, and high pressure gas is charged into the high pressure tank 1 (liner 2) from the gas extraction cylinder portion 5 side, or the high pressure tank 1. (Liner 2). A screw hole 6 is formed in the gas extraction cylinder 5, and a valve device 7 is attached to the screw hole 6. Although not shown, the valve device 7 is configured by a valve mechanism 8 having an opening / closing valve and a pressure reducing valve being housed in a capsule 9, and the flange 10 is brought into contact with the open end of the gas extraction cylinder portion 5 to This is a built-in type in which the capsule 9 (valve mechanism 8) is accommodated in the high-pressure tank 1, a so-called in-tank valve. A pipe connection part 11 for connecting a low-pressure gas pipe to the high-pressure tank 1 protrudes from the high-pressure tank 1 of the valve device 7. On the other hand, a cylindrical portion 13 having a small diameter and a circular cross-section is integrally provided at the other end of the body portion 3 via a bowl-shaped mirror portion 12, and a screw hole 14 is formed in the cylindrical portion 13. A blind plug 15 for maintaining airtightness against high-pressure gas is attached to the screw hole 14, thereby forming a sealed hollow portion 16 for accommodating the high-pressure gas in the liner 2.

上記高圧タンク１は、例えば、ＪＩＳ Ａ ６０６１やＪＩＳ Ａ ６０６２等のアルミニウム合金からなる金属製で、成形後にＴ６処理等の熱処理が施されてなるものであり、短筒状ブランク材を塑性変形させて成形され、上記鏡部４，１２、ガス取出筒部５及び筒部１３は胴部３の３倍以上の厚みに形成されている。特に、上記鏡部４，１２は、胴部３からガス取出筒部５及び筒部１３に近づくに従って胴部３の厚みからガス取出筒部５及び筒部１３の厚みに漸次増大しており、これにより、応力が集中し易い鏡部４，１２を強化している。   The high-pressure tank 1 is made of a metal made of an aluminum alloy such as JIS A 6061 or JIS A 6062, and is subjected to heat treatment such as T6 treatment after molding, and plastically deforms a short cylindrical blank material. The mirror parts 4, 12, the gas extraction cylinder part 5, and the cylinder part 13 are formed to have a thickness three or more times that of the body part 3. In particular, the mirror parts 4 and 12 gradually increase from the thickness of the body part 3 to the thicknesses of the gas extraction cylinder part 5 and the cylinder part 13 from the body part 3 toward the gas extraction cylinder part 5 and the cylinder part 13, Thereby, the mirror parts 4 and 12 where stress tends to concentrate are strengthened.

上記ライナー２のガス取出筒部５及び筒部１３から鏡部４，１２にかけての外周には、焼ばめにより金属製の筒状補強カラー１８が一体に嵌着されている。この補強カラー１８は、上記ガス取出筒部５及び筒部１３とほぼ厚みが等しい横断面円形の筒部１９と、この筒部１９の一端に一体に形成されて外側方に張り出した張出部２０とからなり、この張出部２０の厚みは外端に近づくに従って薄くなっており、これにより、張出部２０外端が段差なく鏡部４，１２外表面に沿うようになっている。また、上記補強カラー１８の内部には、上記筒部１９及び張出部２０を上下に貫通する嵌合孔２２が形成されている。この補強カラー１８は、例えば、ＳＮＣＭ４４０、ＳＣＭ４４０、ＳＫＤ６１等の合金鋼又はチタン合金からなる金属製で、鍛造成形や旋削加工されてなるものであるが、これに限定されず、強度／重量比がアルミニウムよりも高いものであればよく、これによれば、重量軽減に大きく貢献することができる。そして、上記補強カラー１８は、その嵌合孔２２に上記ライナー２のガス取出筒部５及び筒部１３を挿入した状態で、上記筒部１９が焼ばめによりガス取出筒部５及び筒部１３に一体に外嵌合されているとともに、上記張出部２１が鏡部４，１２外表面に一体に接合されている。   On the outer periphery of the liner 2 from the gas extraction cylinder part 5 and the cylinder part 13 to the mirror parts 4 and 12, a metal cylindrical reinforcement collar 18 is integrally fitted by shrink fitting. The reinforcing collar 18 includes a cylindrical portion 19 having a circular cross section substantially equal in thickness to the gas extraction cylindrical portion 5 and the cylindrical portion 13, and an overhang portion integrally formed at one end of the cylindrical portion 19 and projecting outward. 20, and the thickness of the overhanging portion 20 becomes thinner as it approaches the outer end, so that the outer end of the overhanging portion 20 extends along the outer surfaces of the mirror portions 4 and 12 without a step. Further, a fitting hole 22 is formed inside the reinforcing collar 18 so as to penetrate the cylindrical portion 19 and the overhanging portion 20 up and down. The reinforcing collar 18 is made of a metal made of alloy steel or titanium alloy such as SNCM440, SCM440, SKD61, etc., and is formed by forging or turning, but is not limited thereto, and has a strength / weight ratio. What is necessary is just to be higher than aluminum, and according to this, it can contribute greatly to weight reduction. The reinforcing collar 18 is inserted into the fitting hole 22 with the gas extraction tube portion 5 and the tube portion 13 of the liner 2 inserted therein, and the tube portion 19 is fitted into the gas extraction tube portion 5 and the tube portion by shrink fitting. 13, and the overhanging portion 21 is integrally joined to the outer surfaces of the mirror portions 4 and 12.

上記ライナー２外周面は補強繊維層２３で被覆されている。この補強繊維層２３は、ライナー２外周面に繊維を巻き付けることによって形成される。この補強繊維層２３は、上記ライナー２の胴部３外周面と接触し胴部３を被覆する内側繊維層２４と、この内側繊維層２４外周面から筒部１９にかけて接触しライナー２のほぼ全体を被覆する中間繊維層２５と、この中間繊維層２５外周面と接触しライナー２の胴部３から鏡部４，１２の途中にかけてを被覆する外側繊維層２６とで構成されている。   The outer peripheral surface of the liner 2 is covered with a reinforcing fiber layer 23. The reinforcing fiber layer 23 is formed by winding fibers around the outer peripheral surface of the liner 2. The reinforcing fiber layer 23 is in contact with the outer peripheral surface of the body portion 3 of the liner 2 and covers the inner surface of the body portion 3. The reinforcing fiber layer 23 is in contact with the inner fiber layer 24 from the outer peripheral surface of the inner fiber layer 24 to the tube portion 19. And an outer fiber layer 26 in contact with the outer peripheral surface of the intermediate fiber layer 25 and covering the middle portion 3 of the liner 2 and the middle of the mirror portions 4 and 12.

この発明の特徴として、上記内側繊維層２４は、ヤング率３５０ＧＰａ以上で破断時の伸び０．７％以上の高剛性繊維をフープ巻きしてなり、エポキシ樹脂等の熱硬化性樹脂が含浸硬化されている。上記高剛性繊維としては、例えば、ポリアクリロニトリル（ＰＡＮ）を原料にした下記の炭素繊維を挙げることができる。この高剛性繊維は伸び難く、相当の高圧であっても十分に耐え得る。   As a feature of the present invention, the inner fiber layer 24 is formed by hoop-wrapping high-rigidity fibers having a Young's modulus of 350 GPa or more and an elongation at break of 0.7% or more, and is impregnated and cured with a thermosetting resin such as an epoxy resin. ing. Examples of the high-rigidity fibers include the following carbon fibers made from polyacrylonitrile (PAN) as a raw material. This high-rigidity fiber is difficult to stretch and can withstand even a considerable high pressure.

＜東レ製 高性能炭素繊維トレカ（Ｒ） Ｍ４６ＪＢ＞
ヤング率 ４３６ＧＰａ
引張強度 ４．２ＧＰａ
破断時の伸び １．０％
また、上記中間繊維層２５は、ヤング率２８０ＧＰａ以上３５０ＧＰａ未満で破断時の伸び１．５％以上２．０％未満の繊維をヘリカル巻きしてなり、エポキシ樹脂等の熱硬化性樹脂が含浸硬化されている。上記繊維としては、例えば、ポリアクリロニトリル（ＰＡＮ）を原料にした下記の炭素繊維を挙げることができる。この繊維の剛性は、ヘリカル巻きが可能になるように上記高剛性繊維よりは低いが、コスト面から層厚を必要以上に厚くしなくてもよいように外側繊維層２６よりは高くなっている。つまり、このヘリカル巻きの中間繊維層２５は、フープ巻きの内側繊維層２４に比べて荷重分担が約半分でよいので、それほど高剛性は要求されず、したがって、巻き易さとコスト面を考慮して内側繊維層２４と外側繊維層２６との中間の剛性に設定しているのである。 <High-performance carbon fiber trading card (R) M46JB manufactured by Toray>
Young's modulus 436 GPa
Tensile strength 4.2 GPa
Elongation at break 1.0%
The intermediate fiber layer 25 is formed by helically winding fibers having a Young's modulus of 280 GPa or more and less than 350 GPa and an elongation at break of 1.5% or more and less than 2.0%, and a thermosetting resin such as an epoxy resin is impregnated and cured. Has been. Examples of the fibers include the following carbon fibers made from polyacrylonitrile (PAN) as a raw material. The rigidity of the fiber is lower than that of the high-rigidity fiber so that helical winding is possible, but is higher than that of the outer fiber layer 26 so that the layer thickness does not need to be increased more than necessary from the viewpoint of cost. . In other words, the helically wound intermediate fiber layer 25 does not require so high rigidity because the load sharing may be about half that of the hoop-wrapped inner fiber layer 24. Therefore, in consideration of ease of winding and cost. The intermediate rigidity between the inner fiber layer 24 and the outer fiber layer 26 is set.

＜東レ製 高性能炭素繊維トレカ（Ｒ） Ｔ８００ＨＢ＞
ヤング率 ２９４ＧＰａ
引張強度 ５．４９ＧＰａ
破断時の伸び １．９％
さらに、上記外側繊維層２６は、ヤング率２３０ＧＰａ以上２８０ＧＰａ未満で破断時の伸び２．０％以上の繊維をライナー中心線に対する繊維角度が上記中間繊維層の繊維角度よりも大きくなるようにハイアングルヘリカル巻きしてなり、エポキシ樹脂等の熱硬化性樹脂が含浸硬化されている。上記繊維としては、例えば、ポリアクリロニトリル（ＰＡＮ）を原料にした下記の炭素繊維や、ポリパラフェニレンベンゾビスオキサゾール（ＰＢＯ）を原料とした下記の繊維を挙げることができる。これら繊維は上記の内側繊維層２４を構成する高剛性繊維に比べて伸び易いという性質を備えており、高剛性繊維が伸び難いことの裏返しとして低下する耐衝撃性を補うことができる。 <High-performance carbon fiber trading card (R) T800HB manufactured by Toray>
Young's modulus 294GPa
Tensile strength 5.49GPa
Elongation at break 1.9%
Further, the outer fiber layer 26 has a Young's modulus of 230 GPa or more and less than 280 GPa and has a high angle so that the fiber angle with respect to the liner center line is larger than the fiber angle of the intermediate fiber layer. It is helically wound and impregnated and cured with a thermosetting resin such as an epoxy resin. Examples of the fiber include the following carbon fiber using polyacrylonitrile (PAN) as a raw material and the following fiber using polyparaphenylene benzobisoxazole (PBO) as a raw material. These fibers have the property of being easily stretched as compared with the high-rigidity fibers constituting the inner fiber layer 24, and can compensate for the impact resistance that decreases as the reverse of the fact that the high-rigidity fibers are difficult to stretch.

＜東レ製 高性能炭素繊維トレカ（Ｒ） Ｔ７００＞
ヤング率 ２３０ＧＰａ
引張強度 ４．９ＧＰａ
破断時の伸び ２．１％
＜東洋紡製 ＺＹＬＯＮ−ＨＭ（Ｒ）＞
ヤング率 ２７０ＧＰａ
引張強度 ５．８ＧＰａ
破断時の伸び ２．５％
上記内側繊維層２４は、繊維をライナー２の胴部３外周面にライナー中心線方向と直交する円周方向にフープ巻きした繊維層であり、上記中間繊維層２５は、繊維をライナー２外周面ほぼ全体にライナー中心線方向に螺旋状にヘリカル巻きした繊維層であり、上記外側繊維層２６は、繊維をライナー２外周面の胴部３から鏡部４，１２の途中にかけてライナー中心線に対して７５°前後でハイアングルヘリカル巻きした繊維層である。 <Toray Industries high-performance carbon fiber trading card (R) T700>
Young's modulus 230 GPa
Tensile strength 4.9 GPa
Elongation at break 2.1%
<Toyobo ZYLON-HM (R)>
Young's modulus 270 GPa
Tensile strength 5.8 GPa
Elongation at break 2.5%
The inner fiber layer 24 is a fiber layer in which fibers are hoop-wrapped around the outer peripheral surface of the body portion 3 of the liner 2 in the circumferential direction perpendicular to the liner centerline direction, and the intermediate fiber layer 25 is an outer peripheral surface of the liner 2 The outer fiber layer 26 is a fiber layer helically wound helically in the direction of the center line of the liner, and the outer fiber layer 26 extends from the body 3 of the outer peripheral surface of the liner 2 to the middle of the mirror parts 4 and 12 with respect to the center line of the liner. This is a fiber layer that is helically wound at a high angle around 75 °.

また、上記補強繊維層２３を構成する各繊維層２４，２５，２６は、繊維を偏平に集束してエポキシ樹脂等の熱硬化性樹脂を含浸させた繊維テープをプリプレグ状態で巻き付けて上記熱硬化性樹脂を硬化させて構成されている。上記プリプレグ状態とは、熱硬化性樹脂がある程度硬化を進めて生乾きした状態でＢ状態といわれる状態であり、このようなプレプレグ状態の繊維テープは、使用するまでは乾燥しないように冷蔵室等で保管しておく。   Further, each of the fiber layers 24, 25, and 26 constituting the reinforcing fiber layer 23 is formed by winding a fiber tape impregnated with a flat fiber and impregnated with a thermosetting resin such as an epoxy resin in a prepreg state, and performing the thermosetting. It is configured by curing a functional resin. The prepreg state is a state called the B state in which the thermosetting resin has been cured to some extent and is dried, and the fiber tape in such a prepreg state is kept in a refrigerator room or the like so as not to be dried until it is used. Keep it.

次に、上述の如く構成された高圧タンク１の製造要領の一例を図３に基づき説明する。   Next, an example of the manufacturing procedure of the high-pressure tank 1 configured as described above will be described with reference to FIG.

まず、パイプカット工程Ｓ１で、アルミニウム合金製の長尺パイプ材Ｐを所定寸法に切断して両端が開口した短筒状ブランク材Ｂを形成する。   First, in the pipe cutting step S1, a long pipe material P made of an aluminum alloy is cut into a predetermined dimension to form a short cylindrical blank material B having both ends opened.

次いで、フローフォーミング工程Ｓ２で、図示しないが、上記短筒状ブランク材Ｂをマンドレルに外嵌合して取り付け、該マンドレルをその軸心回りに回転させて短筒状ブランク材Ｂを一体に回転させ、成形ローラを上記短筒状ブランク材Ｂ外周面に圧接させることで回転させながら短筒状ブランク材Ｂ外周面を軸心方向にしごき、短筒状ブランク材Ｂをフローフォーミングする。これにより、短筒状ブランク材Ｂが塑性変形して長筒状ブランク材Ｂ′が成形される。この段階で、開口端から所定領域を除いた長筒状ブランク材Ｂ′の厚みが、完成品としての高圧タンク１のライナー２の胴部３の厚みと等しくなっている。また、上記長筒状ブランク材Ｂ′の開口端から所定領域は、開口端に近づくに従って厚みが漸次増大している。   Next, in the flow forming step S2, although not shown, the short cylindrical blank B is externally fitted and attached to a mandrel, and the short cylindrical blank B is rotated integrally by rotating the mandrel around its axis. Then, the outer peripheral surface of the short cylindrical blank material B is squeezed in the axial direction while rotating by pressing the forming roller against the outer peripheral surface of the short cylindrical blank material B, and the short cylindrical blank material B is flow-formed. Thereby, the short cylindrical blank material B is plastically deformed to form the long cylindrical blank material B ′. At this stage, the thickness of the long cylindrical blank B ′ excluding the predetermined region from the opening end is equal to the thickness of the body portion 3 of the liner 2 of the high-pressure tank 1 as a finished product. Further, the thickness of the predetermined region from the opening end of the long cylindrical blank B ′ gradually increases as it approaches the opening end.

その後、スピニング工程Ｓ３で、図示しないが、上記長筒状ブランク材Ｂ′をチャック装置で保持してその軸心回りに回転させ、成形ローラを長筒状ブランク材Ｂ′の一方の開口端近傍から開口端にかけて傾けて圧接させることで回転させながら長筒状ブランク材Ｂ′の軸心に対して斜めに移動させてしごき、長筒状ブランク材Ｂ′の一方の開口端から所定領域をスピニングにより口絞りする。これにより、長筒状ブランク材Ｂ′の開口端から所定領域が塑性変形して筒状胴部３の一端に椀状鏡部４を介してガス取出筒部５が一体に突設される。そして、上述の如きスピニングによる口絞り成形により、鏡部４の厚みが胴部３からガス取出筒部５に近づくに従って漸次増大するように成形され、かつガス取出筒部５は胴部３の３倍以上厚みに設定されている。長筒状ブランク材Ｂ′の他方の開口端側も、同様のスピニングによる口絞り成形を行い、胴部３の他端に椀状鏡部１２を介して筒部１３が一体に突設され、ここでも、鏡部１２の厚みが胴部３から筒部１３に近づくに従って漸次増大するように成形され、かつ筒部１３は胴部３の３倍以上厚みに設定されている。これにより、一端にガス取出筒部５が他端に筒部１３が突設されたライナー２が得られる。   Thereafter, in the spinning step S3, although not shown, the long cylindrical blank B 'is held by a chuck device and rotated around its axis, and the molding roller is near one open end of the long cylindrical blank B'. It is tilted from the opening end to the opening end and is moved by being inclined with respect to the axial center of the long cylindrical blank B ′ while rotating to spin a predetermined region from one opening end of the long cylindrical blank B ′. Squeeze with. As a result, a predetermined region is plastically deformed from the open end of the long cylindrical blank B ′, and the gas extraction cylindrical portion 5 is integrally projected from one end of the cylindrical barrel portion 3 via the bowl-shaped mirror portion 4. The thickness of the mirror part 4 is shaped so as to gradually increase from the body part 3 toward the gas extraction cylinder part 5 by mouth drawing by spinning as described above, and the gas extraction cylinder part 5 is 3 of the body part 3. The thickness is set to more than double. The other opening end side of the long cylindrical blank material B ′ is also subjected to mouth-drawing by the same spinning, and the cylindrical portion 13 is projected integrally with the other end of the barrel portion 3 via the bowl-shaped mirror portion 12. Also here, the thickness of the mirror part 12 is formed so as to gradually increase from the body part 3 toward the cylinder part 13, and the cylinder part 13 is set to have a thickness three times or more that of the body part 3. Thereby, the liner 2 in which the gas extraction cylinder part 5 is protruded at one end and the cylinder part 13 is protruded at the other end is obtained.

一方、別途鍛造成形や旋削加工した合金鋼製又はチタン合金製等の補強カラー１８を用意する。この補強カラー１８は、上述の如く筒部１９の一端に張出部２０が一体に形成されているとともに、内部に筒部１９及び張出部２０を上下に貫通する嵌合孔２２が形成されている。この嵌合孔２２の内径は、ガス取出筒部５及び筒部１３の外径との関係において焼ばめによる締め代を考慮して設定されている。   On the other hand, a reinforcing collar 18 made of alloy steel or titanium alloy which is separately forged or turned is prepared. As described above, the reinforcing collar 18 has an overhang portion 20 integrally formed at one end of the tube portion 19, and a fitting hole 22 that vertically penetrates the tube portion 19 and the overhang portion 20. ing. The inner diameter of the fitting hole 22 is set in consideration of the interference due to shrink fitting in relation to the outer diameters of the gas extraction cylinder portion 5 and the cylinder portion 13.

次に、補強カラー焼きばめ工程Ｓ４で、上述の如く構成された補強カラー１８をライナー２のガス取出筒部５及び筒部１３にそれぞれ外嵌合させ、焼ばめにより上記補強カラー１８をライナー２のガス取出筒部５及び筒部１３から鏡部４，１２にかけての外周にそれぞれ一体に嵌着させる。   Next, in the reinforcing collar shrink-fitting step S4, the reinforcing collar 18 configured as described above is externally fitted to the gas extraction cylinder portion 5 and the cylinder portion 13 of the liner 2, and the reinforcing collar 18 is fitted by shrink fitting. The liner 2 is integrally fitted to the outer periphery of the gas extraction tube portion 5 and the tube portion 13 to the mirror portions 4 and 12.

これに引き続いて、ワインディング工程Ｓ５で、ヤング率３５０ＧＰａ以上で破断時の伸び０．７％以上の高剛性繊維を偏平に集束してエポキシ樹脂等の熱硬化性樹脂を含浸させた繊維テープをプリプレグ状態で上記ライナー２の胴部３外周面にフープ巻きして内側繊維層２４を形成する。   Subsequently, in the winding step S5, a fiber tape in which high-rigidity fibers having a Young's modulus of 350 GPa or more and an elongation at break of 0.7% or more are focused flatly and impregnated with a thermosetting resin such as an epoxy resin is prepreg. In this state, the inner fiber layer 24 is formed by hoop winding around the outer peripheral surface of the body 3 of the liner 2.

その後、ヤング率２８０ＧＰａ以上３５０ＧＰａ未満で破断時の伸び１．５％以上２．０％未満の繊維からなる繊維テープを内側繊維層２４の上からライナー２のほぼ全体にヘリカル巻きして中間繊維層２５を形成する。   Thereafter, a fiber tape composed of fibers having a Young's modulus of 280 GPa or more and less than 350 GPa and an elongation at break of 1.5% or more and less than 2.0% is helically wound from above the inner fiber layer 24 over almost the entire liner 2, and the intermediate fiber layer. 25 is formed.

さらに、その上にヤング率２３０ＧＰａ以上２８０ＧＰａ未満で破断時の伸び２．０％以上の繊維を偏平に集束してエポキシ樹脂等の熱硬化性樹脂を含浸させた繊維テープをプリプレグ状態で上記中間繊維層２５の上からライナー２の胴部３から鏡部４，１２の途中にかけての外周面にライナー中心線に対して７５°前後でハイアングルヘリカル巻きして外側繊維層２６を形成して、これら内側繊維層２４、中間繊維層２５及び外側繊維層２６で構成された補強繊維層２３により上記ライナー２外周面を被覆する（各繊維層２４，２４，２５は図１に表れる）。   Furthermore, a fiber tape in which fibers having a Young's modulus of 230 GPa or more and less than 280 GPa and an elongation at break of 2.0% or more are flatly focused and impregnated with a thermosetting resin such as an epoxy resin is prepreg and the intermediate fiber is The outer fiber layer 26 is formed on the outer peripheral surface of the liner 25 from the upper part 3 to the middle of the mirror parts 4 and 12 by high-angle helical winding around 75 ° with respect to the liner center line. The outer peripheral surface of the liner 2 is covered with a reinforcing fiber layer 23 composed of an inner fiber layer 24, an intermediate fiber layer 25, and an outer fiber layer 26 (the fiber layers 24, 24, and 25 appear in FIG. 1).

この補強繊維層２３の厚みは、タンク容量やガス充填圧によって決まるが、例えば、タンク容量約３４リットル、ライナー２の胴部３の厚み４．０ｍｍ、ライナー２の外径２８０ｍｍ、ライナー２の長さ８３０ｍｍ、ガス充填圧７０ＭＰａの場合に、約９ｍｍである。なお、内側繊維層２４と中間繊維層２５とを交互に形成してその外側に外側繊維層２６を形成してもよい。   The thickness of the reinforcing fiber layer 23 is determined by the tank capacity and gas filling pressure. For example, the tank capacity is about 34 liters, the thickness of the body 3 of the liner 2 is 4.0 mm, the outer diameter of the liner 2 is 280 mm, and the length of the liner 2 is long. In the case of a length of 830 mm and a gas filling pressure of 70 MPa, it is about 9 mm. In addition, the inner side fiber layer 24 and the intermediate | middle fiber layer 25 may be formed alternately, and the outer side fiber layer 26 may be formed in the outer side.

しかる後、乾燥工程Ｓ６で、上記補強繊維層２３で被覆されたライナー２を乾燥室２７に搬入し、ライナー２の外側及びライナー２内側に配置されたヒーター２８の放射熱で、ライナー２を回転させながら内外から加熱して補強繊維層２３に含浸している熱硬化性樹脂を加熱硬化させ、ライナー２外周面に繊維が巻き付けられてライナー２外周面が補強繊維層２３で被覆された高圧タンク１を得る。なお、ヒーター２８の代わりに熱風をライナー２の内外に導入してライナー２を回転させながら内外から加熱して補強繊維層２３に含浸している熱硬化性樹脂を加熱硬化させてもよい。   Thereafter, in the drying step S6, the liner 2 covered with the reinforcing fiber layer 23 is carried into the drying chamber 27, and the liner 2 is rotated by the radiant heat of the heater 28 arranged outside the liner 2 and inside the liner 2. The high-pressure tank in which the thermosetting resin impregnated in the reinforcing fiber layer 23 is heated and cured by heating from the inside and outside, the fibers are wound around the outer peripheral surface of the liner 2, and the outer peripheral surface of the liner 2 is covered with the reinforcing fiber layer 23. Get one. Instead of the heater 28, hot air may be introduced into the inside and outside of the liner 2 and heated from inside and outside while rotating the liner 2 to heat and cure the thermosetting resin impregnated in the reinforcing fiber layer 23.

このようにして製造された高圧タンク１に対して、バルブ装置７をガス取出筒部５に装着するとともに、盲プラグ１５を筒部１３に装着して完成品とする。   For the high-pressure tank 1 manufactured in this way, the valve device 7 is mounted on the gas extraction tube portion 5 and the blind plug 15 is mounted on the tube portion 13 to obtain a finished product.

このように、この実施の形態では、ヤング率３５０ＧＰａ以上で破断時の伸び０．７％以上の高剛性繊維からなるフープ巻きの内側繊維層２４と、ヤング率２８０ＧＰａ以上３５０ＧＰａ未満で破断時の伸び１．５％以上２．０％未満の繊維からなるヘリカル巻きの中間繊維層２５と、ヤング率２３０ＧＰａ以上２８０ＧＰａ未満で破断時の伸び２．０％以上の繊維からなるハイアングルヘリカル巻きの外側繊維層２６とで構成された補強繊維層２３をライナー２外周面に被覆していることから、高剛性繊維からなる内側繊維層２４でガス充填圧によってライナー２に作用するライナー径方向の引張応力に十分に抗し得てライナー２の耐疲労性を向上させることができるとともに、その耐衝撃性に劣る欠点を伸びのある繊維からなる外側繊維層２６で補うことができ、さらには、ヘリカル巻きの中間繊維層２５により、ライナー中心線方向の耐力を必要以上に層厚を厚くすることなく向上させることができる。したがって、タンク容量が小さくかつライナーの厚みが薄くても、３５〜７５ＭＰａの高圧ガスを充填することができ、小型で軽くしかも耐圧性に優れた高圧タンク１を実現することができる。   Thus, in this embodiment, the hoop-wrapped inner fiber layer 24 composed of high-rigidity fibers having a Young's modulus of 350 GPa or more and an elongation at break of 0.7% or more, and the elongation at break of a Young's modulus of 280 GPa or more and less than 350 GPa. A helically wound intermediate fiber layer 25 made of fibers of 1.5% or more and less than 2.0%, and a high angle helically wound outer fiber made of fibers having a Young's modulus of 230 GPa or more and less than 280 GPa and an elongation at break of 2.0% or more. Since the reinforcing fiber layer 23 composed of the layer 26 is coated on the outer peripheral surface of the liner 2, the inner fiber layer 24 made of high-rigidity fibers has a tensile stress in the radial direction of the liner that acts on the liner 2 by gas filling pressure. An outer fiber made of an elongated fiber that can sufficiently resist the fatigue resistance of the liner 2 and has a disadvantage inferior in impact resistance. It can be compensated by 26, further, the intermediate fibrous layer 25 of the helical winding can be improved without increasing the layer thickness unnecessarily strength of the liner centerline direction. Therefore, even if the tank capacity is small and the liner is thin, it is possible to fill the high-pressure gas of 35 to 75 MPa, and it is possible to realize a high-pressure tank 1 that is small, light and excellent in pressure resistance.

さらに、補強繊維層２３を構成する各繊維層２４，２５，２６を、繊維を偏平に集束して熱硬化性樹脂を含浸させた繊維テープをプリプレグ状態で巻き付けて上記熱硬化性樹脂を硬化させて構成していることから、硬い高剛性繊維を滑り易くてライナー２に巻き難く弛みが生じてライナー２に作用する引張応力を全繊維に均等に分配し辛い紐状の形態で用いる場合に比べ、高剛性繊維が偏平なテープ状の形態であってライナー２に沿わせ易く、ライナー２に弛みなく巻き付けることができて上記引張応力を全繊維に均等に分配して、ライナー２の耐疲労性向上を容易に実現することができる。   Further, the fiber layers 24, 25, and 26 constituting the reinforcing fiber layer 23 are wound in a prepreg state with a fiber tape impregnated with a thermosetting resin by concentrating the fibers flatly to cure the thermosetting resin. Compared to the case where hard high-rigid fibers are slippery and difficult to wind around the liner 2 and are loosened, and the tensile stress acting on the liner 2 is evenly distributed to all fibers and used in the form of a difficult string. The high-stiffness fiber is in the form of a flat tape that is easy to fit along the liner 2 and can be wound around the liner 2 without slack, and the tensile stress is evenly distributed to all the fibers, so that the fatigue resistance of the liner 2 is achieved. Improvement can be easily realized.

また、ガス取出筒部５及び筒部１３を胴部３の３倍以上の厚みに設定し、そこから鏡部４，１２を漸次薄くして胴部３に続かせていることから、上記ガス取出筒部５、筒部１３及び鏡部４，１２の強度を確保することができ、上述の補強繊維層２３によるライナー２の耐疲労性向上及び耐衝撃性確保と相俟って、３５〜７５ＭＰａの高圧に一層に耐え得る高圧タンク１とすることができる。また、上記胴部３が薄くてもガス取出筒部５、筒部１３及び鏡部４，１２を厚くして強度を確保しているので、胴部３が薄い分だけ高圧タンク１全体の重量を軽減することができ、かつ材料費もあまり掛けないようにすることができる。   Further, since the gas extraction tube portion 5 and the tube portion 13 are set to a thickness three times or more than that of the body portion 3, the mirror portions 4 and 12 are gradually made thinner from there and are continued to the body portion 3. The strength of the take-out cylinder part 5, the cylinder part 13 and the mirror parts 4 and 12 can be ensured, and together with the improvement in fatigue resistance and impact resistance of the liner 2 by the above-described reinforcing fiber layer 23, 35-35 The high-pressure tank 1 can withstand a high pressure of 75 MPa. Even if the body 3 is thin, the gas extraction tube 5, the tube 13, and the mirrors 4 and 12 are thickened to ensure the strength, so that the weight of the entire high-pressure tank 1 is reduced by the thickness of the body 3. Can be reduced and the material cost can be reduced.

加えて、ライナー２のガス取出筒部５及び筒部１３から鏡部４，１２にかけての外周に補強カラー１８を嵌着していることから、応力が集中し易いガス取出筒部５、筒部１３及びその近傍の鏡部４，１２の実質的な厚みを上記補強カラー１８の厚みにより増大させて当該箇所の強度を十分に確保することができ、３５〜７５ＭＰａの高圧に一段と耐え得る高圧タンク１とすることができる。また、補強カラー１８をライナー２全体ではなく、応力が集中し易い鏡部４，１２、ガス取出筒部５及び筒部１３にだけ部分的に嵌着させているので、高圧タンク１の重量をそれほど増加させず軽量化を図ることができるとともに、加工の簡易化、低価格化を図ることができる。   In addition, since the reinforcing collar 18 is fitted to the outer periphery of the liner 2 from the gas extraction cylinder part 5 and the cylinder part 13 to the mirror parts 4 and 12, the gas extraction cylinder part 5 and the cylinder part where stress is likely to concentrate. 13 and the mirror portions 4 and 12 in the vicinity thereof can be increased in thickness by the thickness of the reinforcing collar 18 to sufficiently secure the strength of the portion, and can withstand a high pressure of 35 to 75 MPa. 1 can be used. Further, since the reinforcing collar 18 is partially fitted not only to the entire liner 2 but only to the mirror parts 4 and 12, the gas extraction cylinder part 5 and the cylinder part 13 where stress is easily concentrated, the weight of the high-pressure tank 1 is reduced. The weight can be reduced without increasing so much, and the processing can be simplified and the price can be reduced.

さらにまた、繊維をまとめてテープ状の形態でライナー２に巻き付けることから、巻付け作業を簡単に行うことができる。また、熱硬化性樹脂がある程度してプリプレグ状態（Ｂ状態）となった繊維テープをライナー２に巻き付けるため、液状の熱硬化性樹脂が作業場に滴り落ちて作業環境が悪化するウェットワインディング法の場合に比べ、熱硬化性樹脂が作業場に滴り落ちず、作業環境の悪化を防止することができる。   Furthermore, since the fibers are collectively wound around the liner 2 in the form of a tape, the winding operation can be easily performed. In the case of a wet winding method in which a liquid thermosetting resin is dripped into the work place and the working environment is deteriorated because the fiber tape in which the thermosetting resin is in a prepreg state (B state) is wound around the liner 2 to some extent. Compared to the above, the thermosetting resin does not drip into the work place, and the work environment can be prevented from deteriorating.

また、乾燥室２７に搬入されたライナー２を内外から加熱するので、補強繊維層２３の熱硬化性樹脂が層内外両側からほぼ同時に硬化し、これにより、補強繊維層２３の熱硬化性樹脂を外側からのみ加熱する場合において、熱硬化性樹脂が外側から内側へと順に硬化収縮して内側の未硬化樹脂が外側の硬化樹脂から圧縮力を受けて繊維に弛みが生ずる事態を回避することができ、ガス充填圧によってライナー２に作用する引張応力を全繊維に均等に分配して早期破断に至らないようにすることができる。   Further, since the liner 2 carried into the drying chamber 27 is heated from inside and outside, the thermosetting resin of the reinforcing fiber layer 23 is cured almost simultaneously from both the inside and outside of the layer, whereby the thermosetting resin of the reinforcing fiber layer 23 is In the case of heating only from the outside, it is possible to avoid a situation in which the thermosetting resin is cured and contracted in order from the outside to the inside and the uncured resin on the inside receives a compressive force from the outside cured resin and the fibers are slackened. In addition, the tensile stress acting on the liner 2 by the gas filling pressure can be evenly distributed to all the fibers so as not to cause early breakage.

（実施の形態２）
図４はこの発明の実施の形態２に係る高剛性繊維を用いた高圧タンク１を示す。この高圧タンク１は補強カラー１８の形状が実施の形態１と異なっている。つまり、上記補強カラー１８の張出部２０の裏面にリング状膨出部２１が一体に膨出して形成されている。これに伴い、ライナー２における鏡部４のガス取出筒部５との境目近傍における外周にリング状嵌合凹部１７が形成されている。そして、上記補強カラー１８の張出部２０は、その膨出部２１を上記鏡部４の嵌合凹部１７に嵌入した状態で焼ばめにより鏡部４外表面に一体に接合されている。図示しないが、反対側の鏡部１２の筒部１３にも同様に補強カラー１８を嵌合している。そのほかは、実施の形態１と同様に構成されているので、同一の構成箇所には同一の符号を付してその詳細な説明を省略する。 (Embodiment 2)
FIG. 4 shows a high-pressure tank 1 using high-rigidity fibers according to Embodiment 2 of the present invention. The high-pressure tank 1 is different from the first embodiment in the shape of the reinforcing collar 18. That is, the ring-shaped bulging portion 21 is integrally formed on the back surface of the overhanging portion 20 of the reinforcing collar 18. Accordingly, a ring-shaped fitting recess 17 is formed on the outer periphery of the liner 2 in the vicinity of the boundary between the mirror portion 4 and the gas extraction tube portion 5. The overhanging portion 20 of the reinforcing collar 18 is integrally joined to the outer surface of the mirror portion 4 by shrink fitting with the bulging portion 21 fitted in the fitting recess 17 of the mirror portion 4. Although not shown, a reinforcing collar 18 is similarly fitted to the cylindrical portion 13 of the opposite mirror portion 12. Other than that, the configuration is the same as in the first embodiment, and therefore, the same components are denoted by the same reference numerals and detailed description thereof is omitted.

したがって、この実施の形態２では、上記の実施の形態１と同様の作用効果を奏することができる。   Therefore, in the second embodiment, the same effects as those of the first embodiment can be obtained.

加えて、この実施の形態２では、補強カラー１８の張出部２０に膨出形成したリング状膨出部２１を、鏡部４，１２のガス取出筒部５及び筒部１３との境目近傍における外周に形成したリング状嵌合凹部１７に嵌入して焼ばめにより接合しているので、補強カラー１８とライナー２とを確実に嵌合させることができる。また、上記膨出部２１があることで当該部分の補強カラー１８の厚みが増大し、その分だけ強度アップを図ることができる。   In addition, in the second embodiment, the ring-shaped bulging portion 21 bulging and formed on the protruding portion 20 of the reinforcing collar 18 is provided near the boundary between the gas extraction tube portion 5 and the tube portion 13 of the mirror portions 4 and 12. Since it fits in the ring-shaped fitting recessed part 17 formed in the outer periphery in and is joined by shrink fitting, the reinforcement collar 18 and the liner 2 can be reliably fitted. Further, the presence of the bulging portion 21 increases the thickness of the reinforcing collar 18 in the portion, and the strength can be increased accordingly.

なお、上記の実施の形態１，２では、フローフォーミングに供する短筒状ブランク材Ｂとして、両端が開口した円筒体のものを例示したが、有底筒状のものであってもよい。   In the first and second embodiments described above, the short cylindrical blank material B used for flow forming is exemplified by a cylindrical body having both ends opened, but a bottomed cylindrical material may be used.

この発明は、小型で軽量でありながら３５〜７５ＭＰａの高圧ガスに耐え得る自動車用水素燃料タンク等の高圧タンクとして有用である。   The present invention is useful as a high-pressure tank such as an automobile hydrogen fuel tank that can withstand a high pressure gas of 35 to 75 MPa while being small and light.

この発明の実施の形態１に係る高剛性繊維を用いた高圧タンクのガス取出筒部側を拡大して示す断面図である。It is sectional drawing which expands and shows the gas extraction cylinder part side of the high pressure tank using the highly rigid fiber which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る高剛性繊維を用いた高圧タンク全体の断面図である。It is sectional drawing of the whole high pressure tank using the highly rigid fiber which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る高剛性繊維を用いた高圧タンクの製造工程図である。It is a manufacturing-process figure of the high pressure tank using the highly rigid fiber which concerns on Embodiment 1 of this invention. この発明の実施の形態２に係る高剛性繊維を用いた高圧タンクの図１相当図である。It is the FIG. 1 equivalent view of the high-pressure tank using the highly rigid fiber which concerns on Embodiment 2 of this invention.

符号の説明Explanation of symbols

１ 高圧タンク
２ ライナー
３ 胴部
４ 鏡部
５ ガス取出筒部
１７ 嵌合凹部
１８ 補強カラー
１９ 筒部
２０ 張出部
２１ 膨出部
２３ 補強繊維層
２４ 内側繊維層
２５ 中間繊維層
２６ 外側繊維層
２７ 乾燥室
２８ ヒーター
Ｂ′ 長筒状ブランク材
DESCRIPTION OF SYMBOLS 1 High pressure tank 2 Liner 3 trunk | drum 4 mirror part 5 gas extraction cylinder part 17 fitting recessed part 18 reinforcement collar 19 cylinder part 20 overhang part 21 bulging part 23 reinforcement fiber layer 24 inner fiber layer 25 intermediate fiber layer 26 outer fiber layer 27 Drying room 28 Heater B 'Long cylindrical blank

Claims (7)

筒状の金属製ライナーと、このライナー外周面を被覆する補強繊維層とを備え、
上記補強繊維層は、ヤング率３５０ＧＰａ以上で破断時の伸び０．７％以上の高剛性繊維をフープ巻きしてなり熱硬化性樹脂が含浸硬化された内側繊維層と、
ヤング率２８０ＧＰａ以上３５０ＧＰａ未満で破断時の伸び１．５％以上２．０％未満の繊維をヘリカル巻きしてなり熱硬化性樹脂が含浸硬化された中間繊維層と、
ヤング率２３０ＧＰａ以上２８０ＧＰａ未満で破断時の伸び２．０％以上の繊維をライナー中心線に対する繊維角度が上記中間繊維層の繊維角度よりも大きくなるようにハイアングルヘリカル巻きしてなり熱硬化性樹脂が含浸硬化された外側繊維層とで構成されていることを特徴とする高剛性繊維を用いた高圧タンク。 A cylindrical metal liner, and a reinforcing fiber layer covering the outer peripheral surface of the liner,
The reinforcing fiber layer has a Young's modulus of 350 GPa or more and an inner fiber layer in which a thermosetting resin is impregnated and cured by hoop-wrapping a high-rigidity fiber having an elongation at break of 0.7% or more;
An intermediate fiber layer in which a Young's modulus is 280 GPa or more and less than 350 GPa and a fiber having an elongation at break of 1.5% or more and less than 2.0% is helically wound and impregnated and cured with a thermosetting resin;
A thermosetting resin in which a fiber having a Young's modulus of 230 GPa or more and less than 280 GPa and an elongation at break of 2.0% or more is helically wound at a high angle so that the fiber angle with respect to the center line of the liner is larger than the fiber angle of the intermediate fiber layer. A high-pressure tank using high-rigidity fibers, characterized in that it comprises an outer fiber layer impregnated and cured. 請求項１に記載の高剛性繊維を用いた高圧タンクにおいて、
補強繊維層を構成する各繊維層は、繊維を偏平に集束して熱硬化性樹脂を含浸させた繊維テープをプリプレグ状態で巻き付けて上記熱硬化性樹脂を硬化させて構成されていることを特徴とする高剛性繊維を用いた高圧タンク。 In the high-pressure tank using the highly rigid fiber according to claim 1,
Each fiber layer constituting the reinforcing fiber layer is formed by winding a fiber tape impregnated with a thermosetting resin in a prepreg state by concentrating the fibers flatly and curing the thermosetting resin. A high-pressure tank using high-rigidity fibers. 請求項１に記載の高剛性繊維を用いた高圧タンクにおいて、
ライナーは、金属製の短筒状ブランク材を塑性変形させて筒状胴部の一端に椀状鏡部を介してガス取出筒部が突設されて構成され、
このガス取出筒部は上記胴部の３倍以上の厚みに設定され、上記鏡部は胴部からガス取出筒部に行くに従って胴部の厚みからガス取出筒部の厚みに漸次増大していることを特徴とする高剛性繊維を用いた高圧タンク。 In the high-pressure tank using the highly rigid fiber according to claim 1,
The liner is configured by plastically deforming a metal short cylindrical blank material and projecting a gas extraction cylinder part at one end of the cylindrical body part via a bowl-shaped mirror part,
This gas extraction cylinder part is set to a thickness three times or more than the trunk part, and the mirror part gradually increases from the thickness of the trunk part to the thickness of the gas extraction cylinder part as it goes from the trunk part to the gas extraction cylinder part. A high-pressure tank using highly rigid fibers. 請求項３に記載の高剛性繊維を用いた高圧タンクにおいて、
ライナーのガス取出筒部から鏡部にかけての外周には、金属製の筒状補強カラーが嵌着されていることを特徴とする高剛性繊維を用いた高圧タンク。 In the high-pressure tank using the highly rigid fiber according to claim 3,
A high-pressure tank using a high-rigidity fiber, characterized in that a metal cylindrical reinforcing collar is fitted on the outer periphery from the gas extraction cylinder part to the mirror part of the liner. 請求項４に記載の高剛性繊維を用いた高圧タンクにおいて、
補強カラーは、ガス取出筒部に嵌着される筒部と、この筒部の一端から外側方に張り出す張出部とからなり、この張出部裏面には、リング状膨出部が膨出して形成され、
一方、鏡部のガス取出筒部との境目近傍における外周には、上記補強カラーを上記ライナーのガス取出筒部から鏡部にかけての外周に嵌着した状態で、上記膨出部が嵌入するリング状嵌合凹部が形成されていることを特徴とする高剛性繊維を用いた高圧タンク。 In the high-pressure tank using the highly rigid fiber according to claim 4,
The reinforcing collar is composed of a cylinder part fitted to the gas extraction cylinder part and an overhang part projecting outward from one end of the cylinder part, and a ring-like bulge part is inflated on the back surface of the overhang part. Formed out of
On the other hand, on the outer periphery in the vicinity of the boundary between the gas extraction cylinder part of the mirror part and the ring where the bulging part is inserted in a state where the reinforcement collar is fitted on the outer periphery from the gas extraction cylinder part to the mirror part of the liner A high-pressure tank using high-rigidity fibers, characterized in that a shaped fitting recess is formed. ヤング率３５０ＧＰａ以上で破断時の伸び０．７％以上の高剛性繊維を偏平に集束して熱硬化性樹脂を含浸させた繊維テープをプリプレグ状態で筒状の金属製ライナー外周面にフープ巻きして内側繊維層を形成し、
次いで、ヤング率２８０ＧＰａ以上３５０ＧＰａ未満で破断時の伸び１．５％以上２．０％未満の繊維を偏平に集束して熱硬化性樹脂を含浸させた繊維テープをプリプレグ状態で上記内側繊維層外周面にヘリカル巻きして中間繊維層を形成し、
その後、ヤング率２３０ＧＰａ以上２８０ＧＰａ未満で破断時の伸び２．０％以上の繊維を偏平に集束して熱硬化性樹脂を含浸させた繊維テープをプリプレグ状態で上記中間繊維層外周面にライナー中心線に対する繊維角度が上記中間繊維層の繊維角度よりも大きくなるようにハイアングルヘリカル巻きして外側繊維層を形成して、上記内側繊維層、中間繊維層及び外側繊維層で構成された補強繊維層により上記ライナー外周面を被覆し、
しかる後、上記補強繊維層で被覆されたライナーを乾燥室に搬入して加熱し、補強繊維層に含浸している熱硬化性樹脂を硬化させることを特徴とする高剛性繊維を用いた高圧タンクの製造方法。 A fiber tape impregnated with a thermosetting resin and flatly gathered high-rigidity fibers with a Young's modulus of 350 GPa or more and an elongation at break of 0.7% or more is hoop-wound around a cylindrical metal liner outer peripheral surface in a prepreg state. To form an inner fiber layer,
Next, a fiber tape in which fibers having a Young's modulus of 280 GPa or more and less than 350 GPa and an elongation at break of 1.5% or more and less than 2.0% are flatly focused and impregnated with a thermosetting resin is preliminarily placed on the outer periphery of the inner fiber layer. Helically wound on the surface to form an intermediate fiber layer,
Thereafter, a fiber tape in which fibers having a Young's modulus of 230 GPa or more and less than 280 GPa and an elongation at break of 2.0% or more are flatly focused and impregnated with a thermosetting resin is placed on the outer peripheral surface of the intermediate fiber layer in the prepreg state. Reinforcing fiber layer composed of the inner fiber layer, the intermediate fiber layer, and the outer fiber layer by forming high-angle helical winding so that the fiber angle with respect to the intermediate fiber layer is larger than the fiber angle of the intermediate fiber layer. The liner outer peripheral surface is covered by
Thereafter, the liner covered with the reinforcing fiber layer is carried into a drying chamber and heated to cure the thermosetting resin impregnated in the reinforcing fiber layer, and a high-pressure tank using high-rigidity fibers. Manufacturing method. 請求項６に記載の高剛性繊維を用いた高圧タンクの製造方法において、
乾燥室に搬入されたライナーを内外から加熱することを特徴とする高剛性繊維を用いた高圧タンクの製造方法。 In the manufacturing method of the high-pressure tank using the highly rigid fiber according to claim 6,
A method for producing a high-pressure tank using a high-rigidity fiber, wherein a liner carried into a drying chamber is heated from inside and outside.
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