Abstract: A fiber bundle arranging device is provided that laminates fiber bundle layers formed of a fiber bundle. The fiber bundle is engaged with arranged pins to have straight parts. The device includes a press roller and a first moving device. The press roller includes a peripheral portion. The peripheral portion of the press roller depresses the straight parts of the fiber bundle engaged with the pins toward the roots of the pins in the vicinity of the pin. The first moving device moves the press roller in the arrangement direction of the pins such that the peripheral portion sequentially intersects the straight parts of the fiber bundle.

Abstract: A cylinder 40 made of a magnetic material is fixed to an introduction pipe 34. An annular connection projection 401 is provided on the cylinder 40 and a disk 42 is connected to the connection projection 401 with an annular permanent magnet 43. The permanent magnet 43 is fixed to the disk 42 and connected to a distal end surface of the connection projection 401 by a magnetic force. A guide pipe 31 is fixed to the disk 42. The guide pipe 31 and the introduction pipe 34 are connected to each other in series by a connection portion 49 having the cylinder 40, the permanent magnet 43, and the disk 42. A fiber bundle F that is guided via a guide roller 33 is fed to an introduction hole 341 and a guide hole 311.

Abstract: A connection pipe 40A is fit in an introduction pipe 34A. A guide groove 342 extends on the side of the introduction pipe 34A in the Z-axis direction. A guide screw 41 is screwed on the peripheral face of the connection pipe 40A to penetrate through a peripheral wall of the connection pipe 40A. A distal end of the guide screw 41 enters the guide groove 342. The distal end of the guide screw 41 is movable in the Z-axis direction in the guide groove 342. The connection pipe 40A is movable relative to the introduction pipe 34A in the Z-axis direction within the range of the length of the guide groove 342. The connection pipe 40A and the guide pipes 31A are moved in the Z-axis direction with an air cylinder 43. Accordingly, when fiber bundles are arranged using a plurality of guide pipes, the guide pipe is prevented from being caught by a fiber bundle drawn out of another guide pipe.

Abstract: A connection pipe 40A is fit in an introduction pipe 34A. A guide groove 342 extends on the side of the introduction pipe 34A in the Z-axis direction. A guide screw 41 is screwed on the peripheral face of the connection pipe 40A to penetrate through a peripheral wall of the connection pipe 40A. A distal end of the guide screw 41 enters the guide groove 342. The distal end of the guide screw 41 is movable in the Z-axis direction in the guide groove 342. The connection pipe 40A is movable relative to the introduction pipe 34A in the Z-axis direction within the range of the length of the guide groove 342. The connection pipe 40A and the guide pipes 31A are moved in the Z-axis direction with an air cylinder 43. Accordingly, when fiber bundles are arranged using a plurality of guide pipes, the guide pipe is prevented from being caught by a fiber bundle drawn out of another guide pipe.

Abstract: A fiber bundle arranging device is provided that laminates fiber bundle layers formed of a fiber bundle. The fiber bundle is engaged with arranged pins to have straight parts. The device includes a press roller and a first moving device. The press roller includes a peripheral portion. The peripheral portion of the press roller depresses the straight parts of the fiber bundle engaged with the pins toward the roots of the pins in the vicinity of the pin. The first moving device moves the press roller in the arrangement direction of the pins such that the peripheral portion sequentially intersects the straight parts of the fiber bundle.

Abstract: A guide roller 34 includes a cylindrical portion 44 fixed to a support shaft 341, flanges 45, 46 provided at he axial ends of the cylindrical portion 44, a plurality of columnar contact bars 47 extending between the flanges 45, 46. The contact bars 47 are annularly arranged about a rotational axis 340 of the guide roller 34. A fiber bundle F is wrapped around the guide roller 34 so as to contact some of the contact bars 47. The contact bars 47 form a circumferential guide surface S, which contacts the fiber bundle F, about the rotational axis 340. A plurality of through holes 451, 461 are formed in the flanges 45, 46.

Abstract: A cylinder 40 made of a magnetic material is fixed to an introduction pipe 34. An annular connection projection 401 is provided on the cylinder 40 and a disk 42 is connected to the connection projection 401 with an annular permanent magnet 43. The permanent magnet 43 is fixed to the disk 42 and connected to a distal end surface of the connection projection 401 by a magnetic force. A guide pipe 31 is fixed to the disk 42. The guide pipe 31 and the introduction pipe 34 are connected to each other in series by a connection portion 49 having the cylinder 40, the permanent magnet 43, and the disk 42. A fiber bundle F that is guided via a guide roller 33 is fed to an introduction hole 341 and a guide hole 311.

Abstract: Two flat fiber bundles of non-twisted filaments are arranged in an overlapped relationship or in a parallel and adjoining relationship, and held by a gripper at two points spaced apart from each other in the filament-extending direction. Compressed air is injected from a nozzle to the overlapped portion of the fiber bundles between the holding points at a plurality of positions arranged in the direction transverse to the filament-extending direction to cause the adjacent filaments to be entangled. The nozzle is moved across the fiber bundles while injecting air. Filaments are thus opened and rotated by the injected air, and thus entangled. A fiber bundle joining apparatus includes support sections and a receiving section provided in a base, a gripper cooperating with the support sections to grip overlapped ends of fiber bundles therebetween, a nozzle, and a regulating member to temporarily hold the fiber bundles and to allow the lower fiber bundle to be slackened.

Abstract: A FRP pipe comprising a helix winding layer formed by cylindrically winding reinforced fibers, wherein the helix winding layer has two ends and an axis and the reinforced fibers forming the helix winding layers are wound at an angle relative to the axis and hoop winding layers formed at each end of the helix winding layer by winding reinforced fibers at each end wherein the hoop layer are formed from the same continuous reinforced fibers, and the continuous reinforced fibers forming the hoop winding layers extend between the ends at an angle that is the same as the angle of the reinforced fibers forming the helix winding layer.

Abstract: Two flat fiber bundles of non-twisted filaments are arranged in an overlapped relationship or in a parallel and adjoining relationship, and held by a gripper at two points spaced apart from each other in the filament-extending direction. Compressed air is injected from a nozzle to the overlapped portion of the fiber bundles between the holding points at a plurality of positions arranged in the direction transverse to the filament-extending direction to cause the adjacent filaments to be entangled. The nozzle is moved across the fiber bundles while injecting air. Filaments are thus opened and rotated by the injected air, and thus entangled. A fiber bundle joining apparatus includes support sections and a receiving section provided in a base, a gripper cooperating with the support sections to grip overlapped ends of fiber bundles therebetween, a nozzle, and a regulating member to temporarily hold the fiber bundles and to allow the lower fiber bundle to be slackened.

Abstract: A propeller shaft 1 comprising a shaft main body 10 and a yoke 20 which is mounted to the shaft main body 10 with a serrated inserting portion 21 thereof being press fitted into an inner circumferential surface of the shaft main body 10 is constructed such that serration fit-in grooves 11 having extending portions 11b into which serration teeth 22 travel when the yoke 20 is allowed to sink into the shaft main body 10 are formed in advance in the inner circumferential surface of the shaft main body 10. A method for producing the propeller shaft 1 comprises a yoke press fitting step and a yoke withdrawing step that is to be performed after the former step.

Abstract: A filament winding apparatus winds yarn impregnated with resin around the surface of a mandrel with a guide member that moves back and forth axially. Yarn winding is initiated while an end of the yarn is held by a holding device provided in a relatively rotatable manner on a rotary shaft. After winding is started, the yarn extending from the mandrel to the holding device is cut. When winding is finished, the yarn is held with the holding device and the yarn is cut between the mandrel and the holding device with a yarn cutting device.

Abstract: An apparatus for winding a thread around a surface of an object while rotating the object. The apparatus includes a plurality of guide members. The guide members selectively guide a plurality of threads to the surface of the object. One guide member corresponds to one thread. The guide members move along the object. A moving device moves a selected one of the guide members.

Abstract: Two flat fiber bundles of non-twisted filaments are arranged in an overlapped relationship or in a parallel and adjoining relationship, and held by a gripper at two points spaced apart from each other in the filament-extending direction. Compressed air is injected from a nozzle to the overlapped portion of the fiber bundles between the holding points at a plurality of positions arranged in the direction transverse to the filament-extending direction to cause the adjacent filaments to be entangled. The nozzle is moved across the fiber bundles while injecting air. Filaments are thus opened and rotated by the injected air, and thus entangled. A fiber bundle joining apparatus includes support sections and a receiving section provided in a base, a gripper cooperating with the support sections to grip overlapped ends of fiber bundles therebetween, a nozzle, and a regulating member to temporarily hold the fiber bundles and to allow the lower fiber bundle to be slackened.

Abstract: A filament winding apparatus that efficiently fabricates an FRP pipe, which includes a helix layer and separated hoop layers. The apparatus winds fiber strands around a rotating mandrel and includes a winding unit moved reciprocally along an axial direction of the mandrel. The unit includes a helix winding head, which simultaneously winds fiber strands around the mandrel, a hoop winding head, which winds a fiber strand around the mandrel, a helix fiber spreading portion, which spreads the fiber strands wound around the wound subject by the helix winding head, and a hoop fiber spreading portion, which spreads the fiber strand wound around the mandrel by the hoop winding head.

Abstract: A step portion is provided between a serration portion of a metal-made yoke and a leading end portion thereof. During pressure insertion and joining, an FRP-made cylinder is pressure-inserted to the serration portion in a state that the circularity is enhanced by the step portion. Consequently, the pressure insertion and joining is carried out while making the depth of cut grooves uniform, thereby enhancing concentricity (joining accuracy).

Abstract: A propeller shaft 1 comprising a shaft main body 10 and a yoke 20 which is mounted to the shaft main body 10 with a serrated inserting portion 21 thereof being press fitted into an inner circumferential surface of the shaft main body 10 is constructed such that serration fit-in grooves 11 having extending portions 11b into which serration teeth 22 travel when the yoke 20 is allowed to sink into the shaft main body 10 are formed in advance in the inner circumferential surface of the shaft main body 10. A method for producing the propeller shaft 1 comprises a yoke press fitting step and a yoke withdrawing step that is to be performed after the former step.

Abstract: A fiber-reinforced plastic pipe has a joint section formed in one end. The joint section is coupled to another member. The pipe includes a helical layer formed with a fiber. The fiber is wound at a winding angle that is equal to or less than forty-five degrees. The fiber volume fraction of the joint section is lower than the fiber volume fraction of the remainder of the pipe.

Abstract: A filament winding apparatus winds yarn impregnated with resin around the surface of a mandrel with a guide member that moves back and forth axially. Yarn winding is initiated while an end of the yarn is held by a holding device provided in a relatively rotatable manner on a rotary shaft. After winding is started, the yarn extending from the mandrel to the holding device is cut. When winding is finished, the yarn is held with the holding device and the yarn is cut between the mandrel and the holding device with a yarn cutting device.

Abstract: An apparatus for winding a thread around a surface of an object while rotating the object. The apparatus includes a plurality of guide members. The guide members selectively guide a plurality of threads to the surface of the object. One guide member corresponds to one thread. The guide members move along the object. A moving device moves a selected one of the guide members.