Abstract: A steering device includes: a plurality of electric motors 10 configured to be driven to turn wheels of a vehicle; and three or more drive systems 20 each configured to output a driving force for driving a corresponding one of the electric motors 10 to the corresponding one of the electric motors 10. A total of maximum driving forces each of which is a maximum value of a driving force of each drive system 20 of the steering device is set larger than a required driving force required to turn the wheels with the vehicle stationary, and in an event of a failure occurring in one of the three or more drive systems 20, a total of the maximum driving forces of other properly working drive systems 20 out of the three or more drive systems 20 amounts to the required driving force.

Abstract: A steering device includes: a plurality of electric motors 10 configured to be driven to turn wheels of a vehicle; and three or more drive systems 20 each configured to output a driving force for driving a corresponding one of the electric motors 10 to the corresponding one of the electric motors 10. A total of maximum driving forces each of which is a maximum value of a driving force of each drive system 20 of the steering device is set larger than a required driving force required to turn the wheels with the vehicle stationary, and in an event of a failure occurring in one of the three or more drive systems 20, a total of the maximum driving forces of other properly working drive systems 20 out of the three or more drive systems 20 amounts to the required driving force.

Abstract: A stopper device for vehicle includes a movable member, a swing lever capable of swinging in the direction in which the movable member is locked, a solenoid coupled to the swing lever, and a pushing member that pushes the swing lever in the unlocking direction relative to the movable member. The solenoid includes a plunger coupled to the swing lever, and a magnetizing coil to drive the plunger.

Abstract: The present invention provides a method of manufacturing a core shroud for a nuclear plant and a nuclear power plant structure in which a groove portion is easily assembled in the case of manufacturing the core shroud having a weld structure of a nuclear power plant by a laser welding, and it is possible to obtain a weld joint portion in which a plastic distortion region and a residual stress are as small as possible, going with a solidification shrinkage of the weld portion. At a time of welding butted portions of a plurality of members constructing a core shroud, a root face is provided in the butted portion, a length of the root face is set to 25% to 95% of a thickness of the thinner one of the butted portions of a plurality of members, a narrow groove is provided in the other than the root face, and the butted portions are welded by a laser welding using a weld wire.

Abstract: The present invention provides a method of manufacturing a core shroud for a nuclear plant and a nuclear power plant structure in which a groove portion is easily assembled in the case of manufacturing the core shroud having a weld structure of a nuclear power plant by a laser welding, and it is possible to obtain a weld joint portion in which a plastic distortion region and a residual stress are as small as possible, going with a solidification shrinkage of the weld portion. At a time of welding butted portions of a plurality of members constructing a core shroud, a root face is provided in the butted portion, a length of the root face is set to 25% to 95% of a thickness of the thinner one of the butted portions of a plurality of members, a narrow groove is provided in the other than the root face, and the butted portions are welded by a laser welding using a weld wire.