Abstract: A damper device includes a first rotating member, a second rotating member, and a coil spring compressed between the first rotating member and the second rotating member. The first rotating member includes a first plate member forming an engine-side attachment surface, and an annular member coupled to the first plate member. The first plate member further forms an offset surface facing to an engine side in the axial direction and offset from the engine-side attachment surface to a side separated from the engine in the axial direction. A radial-direction area of the offset surface includes an area being on a radial-direction outer side of the engine-side attachment surface and on a radial-direction inner side of the coil spring. The annular member overlaps with the offset surface in the axial direction.

Abstract: A transport vehicle system includes a transport vehicle to travel along a track, a controller to control the transport vehicle, and a power supply provided at each of a plurality of sections of the track. Each of the power supplies includes a sensor to monitor a state of the power supply and a communicator to transmit the monitoring result by the monitor to the controller. The controller is configured or programmed to control the transport vehicle in accordance with the monitoring result.

Abstract: A transport vehicle system includes a transport vehicle to travel along a track, a controller to control the transport vehicle, and a power supply provided at each of a plurality of sections of the track. Each of the power supplies includes a sensor to monitor a state of the power supply and a communicator to transmit the monitoring result by the monitor to the controller. The controller is configured or programmed to control the transport vehicle in accordance with the monitoring result.