Abstract: A mouthpiece structure for a pressure vessel includes a liner constituting a vessel body and a cylindrical part, a cylindrical mouthpiece mounted closely to an inner periphery of the cylindrical part, a housing part having a housing recess formed by recessing at least one of the inner periphery of cylindrical part and an outer periphery of mouthpiece, a sealing member housed in the housing recess while adhering closely to the inner periphery of cylindrical part and the outer periphery of mouthpiece, the sealing member defining a sealed space facing an interface between the inner periphery of the cylindrical part and the outer periphery of the mouthpiece in the housing recess, and a retainer located opposite the sealed space with the sealing member being interposed between them and preventing the sealing member from being displaced in a direction such that the sealing member increases a capacity of the sealed space.

Abstract: A filament winding apparatus prevents a fiber bundle supplied to a liner from interfering with other fiber bundles and fiber supplying guides. First and second guide units include a plurality of fiber supplying guides arranged radially and extending and contracting in a direction approximately perpendicular to a liner central axis. When a fiber bundle supplied from a first supplying guide of the first guide unit crosses between a second supplying guide of the second guide unit and the liner, the distance from the second supplying guide to the liner central axis is made larger than the distance from the first supplying guide to the liner central axis, and in the reverse case, the distance from the first supplying guide to the liner central axis is made larger than the distance from the second supplying guide to the liner central axis.

Abstract: A fiber bundle processing device (filament winding device (100)) that processes a fiber bundle (Fb) having a heat-curable resin impregnated therein, characterized by: comprising a curing device (45A) capable of applying heat to the fiber bundle (Fb); and the curing device (45A) curing or semi-curing some of the resin impregnated into the fiber bundle (Fb), when the fiber bundle (Fb) is partway through being guided into the fiber bundle processing device (filament winding device (100)).

Abstract: A filament winding method performs a hoop winding step including a first step of fixing an end of a fiber bundle to a liner surface at a starting position of hoop winding, a second step of hoop winding the fiber bundle having the end fixed to the liner surface in the first step, a third step of fixing the fiber bundle hoop wound in the second step to the liner surface at an ending position of hoop winding, and a fourth step of cutting the fiber bundle upstream in a fiber bundle supplying direction of the position where the fiber bundle is fixed in the third step.

Abstract: A filament winding device that optimizes the interval between adjacent fiber bundle guides includes a plurality of helical heads on which fiber bundle guides moving in the direction that is roughly perpendicular to the rotating axis of a liner are radially disposed; and winds a fiber bundle onto the outer circumference surface of the liner by passing the helical heads while rotating the liner. An interval adjusting means adjusts the interval between a virtual plane (Pf) which intersects with the guiding opening of a fiber bundle guide disposed on one of the helical heads so as to be orthogonal to the liner rotating axis and a virtual plane (Pw) which intersects with the guiding opening of a fiber bundle guide disposed on the other helical head so as to be orthogonal to the liner rotating axis.

Abstract: A filament winding apparatus includes a tension detecting section, a cutting section and a gripping section. The tension detecting section is arranged on a path of a fiber bundle from a bobbin to a liner, and is configured to detect tension of the fiber bundle between the bobbin and the liner. The cutting section is configured to cut the fiber bundle connected to the bobbin. The gripping section is arranged upstream with respect to the cutting section in a travelling direction of the fiber bundle, and is configured to grip the fiber bundle cut by the cutting section. At this time, in a case where the tension of the fiber bundle detected by the tension detecting section is excessive, the cutting section cuts the fiber bundle and the gripping section grips a yarn end of the fiber bundle connected to the bobbin.

Abstract: A filament winding device enables fiber bundles to be wound around the outer circumference surface of a liner at equal intervals even when the winding angle of the fiber bundles changes. The filament winding device includes a first helical head on which fiber bundle guides are radially disposed in the periphery of a liner to be transported; and a second helical head which is disposed adjacent to the first helical head and on which the fiber bundle guides are radially disposed in the periphery of the liner The filament winding device also has phase adjusting means for adjusting the phase difference between the fiber bundle guides on the first helical head and and on the second helical head in accordance with the angle (?) at which the fiber bundle is wound around the liner.

Abstract: A filament winding device (100) comprising a liner support device (42) supporting a liner (1), and a hoop winding device (43) that winds a fiber bundle (F) on to the outer peripheral surface (1S) of the liner (1) by rotating centered around the liner (1). The filament winding device (100) is characterized by being capable of simultaneously transporting the liner (1) and the hoop winding device (43), by having the liner support device (42) and the hoop winding device (43) arranged upon a trolley (40A), and moving the trolley (40A).

Abstract: A filament winding apparatus includes a hoop winding device mounted with bobbins that supply a fiber bundle. Each of the bobbins is whirled around a periphery of a liner to wind the fiber bundle around an outer peripheral surface of the liner. The hoop winding device is replaceable with another hoop winding device at a predetermined position.

Abstract: A filament winding apparatus that prevents excessive unraveling of a fiber bundle due to variations in the speed at which the fiber bundle is wound includes a hoop winding device having a wrapping table, a bobbin support unit, a braking unit, a slack removal unit, a detector, and a controller. The slack removal unit absorbs slack caused by the difference between winding and unraveling speeds of the fiber bundle. The detector detects whether the amount of slack absorbed is equal to or greater than or is less than, a predetermined amount. When the amount of slack is equal to or greater than the predetermined amount, the controller increases the braking force of the braking unit for braking rotation of a bobbin. When the amount of slack is less than the predetermined amount, the controller reduces the braking force of the braking unit for braking rotation of the bobbin.

Abstract: The FW technique is employed to suppress a non-fiber-wound space from being left during formation of a fiber layer for reinforcement on a liner. A process of forming a fiber-reinforce resin layer on a liner winds and fixes a winding start end fiber of a resin-impregnated carbon fiber on a fiber fixation flange, which is away from the top of a dome section. The process subsequently forms an innermost helical layer from the winding start end fiber extended from the fixation position and the subsequently fed resin-impregnated carbon fiber. The process subsequently forms an inner hoop layer over the innermost helical layer and cuts the winding start end fiber extended from the fixation position of the fiber fixation flange at a position on the periphery of the top of the dome section, prior to formation of a subsequent second helical layer.

Abstract: A gas tank, includes: a liner; and a fiber reinforced plastic layer. A hollow portion is formed within a thickness of the liner along an axial direction of the tank.

Abstract: This bobbin unwinding device (32A (32B)) is provided with a bobbin support shaft (33) which rotatably supports a bobbin (B) around which a band-like fiber bundle (F) is wound, a fixed guide (35) which changes the running direction of the fiber bundle (F) unwound from the bobbin (B), and an auxiliary roller (34) arranged between the bobbin (B) and the fixed guide (35), wherein the fixed guide (35) is arranged such that the shaft center of the fixed guide (35) is substantially perpendicular to the shaft center of the bobbin support shaft (33), and the auxiliary roller (34) is arranged such that the shaft center of the auxiliary roller (34) is parallel or substantially parallel to the shaft center of the bobbin support shaft (33).

Abstract: This fiber bundle supply device (32) is provided with: plural bobbin holder shafts each of which supports a bobbin (B) around which a fiber bundle (F) is wound; and a turntable (323) on which the bobbin holder shafts are arranged in a concentric pattern and which rotates around the central axis (C) of said concentric circle, wherein the bobbin holder shafts are configured from at least a first bobbin holder shaft (321) which supports a first bobbin (B1), and a second bobbin holder shaft (322) which supports a second bobbin (B2). If the fiber bundle (F) wound around the first bobbin (B1) has been unwound and little remains, by rotating the turntable (323) and splicing the fiber bundle (F) of the first bobbin (B1) and the fiber bundle (F) of the second bobbin (B2), unwinding of the fiber bundle (F) wound around the second bobbin (B2) is started.

Abstract: A filament winding method performs a hoop winding step including a first step of fixing an end of a fiber bundle to a liner surface at a starting position of hoop winding, a second step of hoop winding the fiber bundle having the end fixed to the liner surface in the first step, a third step of fixing the fiber bundle hoop wound in the second step to the liner surface at an ending position of hoop winding, and a fourth step of cutting the fiber bundle upstream in a fiber bundle supplying direction of the position where the fiber bundle is fixed in the third step.

Abstract: A filament winding apparatus that connects a driven shaft to a driving shaft automatically includes a rotation unit which can rotate a driving shaft 13 forward or reversely, a control unit which can control start or stop of the rotation of the driving shaft, and connection units which can connect a driven shaft attached to a liner to the driving shaft when phases of the driven and driving shafts are in agreement with each other. A fiber bundle is wound onto an outer peripheral surface of the liner by rotating the liner. A detection unit detects the phase of the driven or the driving shaft. Based on information obtained from the detection unit at the time of connecting the driven shaft to the driving shaft, the control unit rotates the driving shaft and adjusts the phase thereof to make the phases of the driven and driving shafts in agreement with each other.

Abstract: A chuck device of a fiber bundle includes a pair of hands adapted to be opened/closed. The pair of hands includes a plurality of guides adapted to regulate and bend the fiber bundle under a closing state, and to release the fiber bundle under an opening state. Under the closing state, the plurality of guides holds the fiber bundle by being close to each other with tension applied on the fiber bundle.

Abstract: A filament winding apparatus for winding a fiber bundle on the surface of a liner is configured so that the end position of a fiber layer of the dome section of the liner is easily corrected. A control section stores a series of operations for winding the fiber bundle on the liner as winding data including steps, controls a fundamental operation which winds the fiber bundle on the basis of the winding data, and also controls a correction operation which corrects the end position of the fiber layer on the basis of an actual value and a design value when forming a fiber layer by winding the fiber bundle on the dome section of the liner.

Abstract: A filament winding apparatus in which a fiber bundle easily passes through a fiber supplying guide. The filament winding apparatus winds a fiber bundle around a liner, and includes a plurality of fiber supplying guides each supplying a fiber bundle to the liner. Each of the fiber supplying guides includes a bottom portion that guides a wide surface of the fiber bundle, side portions respectively disposed along both sides of the bottom portion, and an opening portion formed between the side portions.

Abstract: A filament winding apparatus that prevents excessive unraveling of a fiber bundle due to variations in the speed at which the fiber bundle is wound includes a hoop winding device having a wrapping table, a bobbin support unit, a braking unit, a slack removal unit, a detector, and a controller. The slack removal unit absorbs slack caused by the difference between winding and unraveling speeds of the fiber bundle. The detector detects whether the amount of slack absorbed is equal to or greater than or is less than, a predetermined amount. When the amount of slack is equal to or greater than the predetermined amount, the controller increases the braking force of the braking unit for braking rotation of a bobbin. When the amount of slack is less than the predetermined amount, the controller reduces the braking force of the braking unit for braking rotation of the bobbin.