Abstract: A computer determines winding parameters based on the width of reinforced fibers, the angle between the reinforced fibers and an imaginary line, and the outer diameter of a cylinder section.

Abstract: Provided is a high-pressure tank in which rupture strength of a reinforcement layer can be improved more surely than in a conventional technique. The high-pressure tank includes a liner having a hollow interior and a reinforcement layer formed on an outer surface of the liner. The reinforcement layer includes unit layers stacked on the outer surface of the liner. A unit layer includes a band-shaped fiber bundle (band B) which includes a curable resin and is wound around the liner such that the band-shaped fiber bundle (band B) is disposed in line along a width of the unit layer. The band-shaped fiber bundle (band B) widens as the unit layers are stacked from an inner peripheral portion of the reinforcement layer to an outer peripheral portion of the reinforcement layer.

Abstract: The present invention provides a method for manufacturing a high pressure tank having a reinforcing layer on an outer surface of a liner provided with dome portions at both end portions of a round tubular shaped body portion, the method including: a winding process of winding a fiber bundle containing a curable resin and having a predetermined tension on the outer surface of the liner; and a reinforcing layer forming process of forming the reinforcing layer by curing the curable resin contained in the fiber bundle wound around the outer surface, in which the winding process is performed so that the tensions of the fiber bundles at the both end portions are lower than a tension of the fiber bundle at a general portion of the body portion defined between the both end portions.

Abstract: The present invention provides a method for manufacturing a high pressure tank having a reinforcing layer on an outer surface of a hollow liner, the method including: a winding process of winding a fiber bundle containing a curable resin and having a predetermined tension on the outer surface of the liner; and a reinforcing layer forming process of forming the reinforcing layer by curing the curable resin contained in the fiber bundle wound around the outer surface, in which the winding process is performed so that the tension of the fiber bundle is reduced toward an outer circumferential side of the reinforcing layer.

Abstract: A mandrel around which fiber-reinforced resin is wound, the mandrel including a cylinder portion having a plurality of first flat surface portions, and a pair of dome portions that are formed at respective ends of the cylinder portion and each include a plurality of second flat surface portions.

Abstract: A high-pressure tank is provided with a liner made of resin, a reinforcing layer including a plurality of fiber layers formed by winding fiber a plurality of times around the outer surface of the liner, and a cap fixed to the axial end portion of the liner and including a supply and discharge hole that supplies and discharges fluid to and from the liner. A starting end, which is a start of winding of the fiber, is disposed overlapping the cap.

Abstract: A high-pressure container inspection method includes a photographing step, an acquiring step, and a determining step. In the photographing step, a carbon fiber is photographed while an outer surface of the carbon fiber wound on a converging portion in an outer peripheral surface of a liner is irradiated with light. In the acquiring step, density information obtained by the reflection of the light with respect to the outer surface of the carbon fiber by the photographing is acquired. In the determining step, the density information obtained by the acquiring step is compared with preset density information to determine whether a shape of a reinforcing layer of the converging portion is good or bad.

Abstract: A manufacturing method and a jig for a high-pressure tank includes a filament winding step in which a reinforcing shaft is inserted from a cap toward the other end of a liner, the axial length of the liner is fixed by the reinforcing shaft, and a fiber-reinforced resin is wound; and a thermal curing step in which the fixing of the reinforcing shaft to the other end of the liner is released so that the liner can change in the axial direction, and the fiber-reinforced resin is heated.

Abstract: A band-shaped bundle is conveyed to a workpiece by a roller row in a filament winding device and a filament winding method. During the conveyance of the band-shaped bundle by the roller row, a width of the band-shaped bundle is adjusted. The band-shaped bundle is wound around the workpiece adjacently in a widthwise direction of the band-shaped bundle.

Abstract: In a filament winding device and a filament winding method, when a band-shaped bundle is wound around a workpiece by way of hoop winding, a straight roller is selected, and the selected straight roller comes into contact with the band-shaped bundle. When the band-shaped bundle is wound around the workpiece by way of helical winding, a crown roller is selected, and the selected crown roller comes into contact with the band-shaped bundle.

Abstract: A method for manufacturing a liner includes a shaft preparation step. In the shaft preparation step, a shaft assembly is prepared in which an annular shaped first attachment and an annular shaped second attachment are attached to the outer circumferential portion of a tubular shaped shaft including an air supply hole. The method for manufacturing the liner further includes a parison supply step of arranging the shaft assembly on an inner side of a parison, and a blow molding step of closing a mold device, supplying air into the parison from the air supply hole to thereby cause the parison to expand, and obtaining a liner molded body. The method for manufacturing the liner further includes a detachment step of removing the shaft from the first attachment and the second attachment, and taking out the shaft to the exterior of the liner molded body.

Abstract: A high pressure tank includes: a liner made of resin and including a round tubular shaped cylinder portion; a first cap member connected to a first connecting end portion of the cylinder portion; a second cap member connected to a second connecting end portion of the cylinder portion; and a reinforcing layer including first reinforcing fibers hoop-wound along a circumferential direction of the cylinder portion. Reinforcing members are laid over the first cap member and the second cap member. The reinforcing members include second reinforcing fibers hoop-wound around the first cap member and the second cap member a plurality of times.

Abstract: A cap of a high-pressure gas tank includes a first member and a second member. The first member is located on the inner side of a liner. The second member is located on the outer side of the liner and is connected to the first member. A rotation restricting structure includes a first rotation restricting portion and a second rotation restricting portion. The first rotation restricting portion is provided on an inner surface of the liner. The second rotation restricting portion is provided on the first member so as to be fitted into the first rotation restricting portion.

Abstract: A computer determines winding parameters based on the width of reinforced fibers, the angle between the reinforced fibers and an imaginary line, and the outer diameter of a cylinder section.

Abstract: A reinforcement layer of a high-pressure vessel has a plurality of low helical layers. In at least one of the (i?1)-th low helical layer and the i-th low helical layer, the difference between the diameter of an opening formed in an end portion of the (i?1)-th low helical layer and the diameter of an opening formed in an end portion of the i-th low helical layer is equal to or larger than the width of the band-shaped fiber when an inclination angle WA of the band-shaped fiber is equal to or smaller than a second angle smaller than a first angle.

Abstract: A winding section of a filament winding apparatus winds a fiber bundle around a filament-wound member. A tension acquisition part acquires a detected winding-tension value. A supply-speed acquisition part acquires a detected supply-speed value. A storage part stores correlation information in which an allowable determination range of winding tension is set in relation to the supply speed. A determination part determines whether the winding of the fiber bundle is successful or unsuccessful by comparing detected-value information, including the detected winding-tension value and the detected supply-speed value associated with each other, with the correlation information.

Abstract: A high-pressure vessel includes a liner and a reinforcing layer. The reinforcing layer includes an inner reinforcing layer and an outer reinforcing layer. Further, the inner reinforcing layer includes a first covering portion, a third covering portion, and a second covering portion. Edge surfaces of the first covering portion and the third covering portion that face each other are in contact with each other. Edge surfaces of the third covering portion and the second covering portion that face each other are also in contact with each other. The outer reinforcing layer covers the outside of the first covering portion, the third covering portion, and the second covering portion.

Abstract: A FW apparatus includes a bobbin driving unit, a winding device, and a tension applying device. A FW method using the FW apparatus includes a temporary suspending step of temporarily suspending operation of the winding device in the middle of winding the fed-out fiber portion around the workpiece. In the temporary suspending step, the length of the feeding path is increased by moving the pressing member while causing the pressing member to press against the fed-out fiber portion in a state of continuing to feed out the fed-out fiber portion from the fiber roll portion.

Abstract: A high pressure tank is provided with a reinforcement layer. The reinforcement layer is provided with an inner laminated section, an outer laminated section, and an intermediate laminated section. The inner laminated section includes a winding start of an impregnated fiber and is disposed radially inward. The outer laminated section includes a winding end of the impregnated fiber and is disposed radially outward. The intermediate laminated section is formed between the inner laminated section and the outer laminated section. First and second dome portions of a liner are respectively provided with first and second core materials between the inner laminated section and the outer laminated section.

Abstract: A manufacturing method and a jig for a high-pressure tank includes a filament winding step in which a reinforcing shaft is inserted from a cap toward the other end of a liner, the axial length of the liner is fixed by the reinforcing shaft, and a fiber-reinforced resin is wound; and a thermal curing step in which the fixing of the reinforcing shaft to the other end of the liner is released so that the liner can change in the axial direction, and the fiber-reinforced resin is heated.