Rail vehicle

A rail vehicle, comprising:

• a roof structure that configures an upper face;
• a side structure that configures a side face;
• a gable end structure that configures an end face in a longitudinal direction;
• an underframe that configures a lower face, wherein
• the underframe is configured from a hollow shaped member formed from two face plates and a rib that connects the face plates to each other,
• the hollow member that configures the underframe includes a first upper side face plate arranged at a central portion in a widthwise direction of the underframe, a first lower side face plate arranged at the central portion in the widthwise direction of the underframe, a second upper side face plate arranged at an end portion in the widthwise direction of the underframe and positioned below the first upper side face plate, a second lower side face plate arranged at the end portion in the widthwise direction of the underframe and positioned below the first lower side face plate, a third upper side face plate that connects the first upper side face plate and the second upper side face plate to each other, and a third lower side face plate that connects the first lower side face plate and the second lower side face plate to each other, and
• a space is provided below the first lower side face plate, and a closing plate that connects adjacent end portions of a pair of the second lower side face plates to each other is arranged in the space;
• a floor board supported so as to extend along a substantially horizontal plane by a floor board support provided on the first upper side face plate and the second upper side face plate and/or by a floor board holder provided on the inner side of the side structure above the first upper side face plate, the second upper side face plate, and the third upper side face plate;
• an air conditioner arranged below the first lower side face plate, the second lower side face plate, and the third lower side face plate;
• a supply air space and a return air space configured from spaces surrounded by the second upper side face plate, the third upper side face plate, the floor board, the floor board support, and a face on the vehicle inner side of the side structure and extending in a longitudinal direction of the underframe, wherein
• an opening provided in and extending in an upward and downward direction through the hollow shaped member that configures the end portion in the widthwise direction of the underframe is positioned above the air conditioner, and
• supply air to be carried from the air conditioner to an inside of the vehicle through the opening passes through an inside of the supply air space and return air to be carried from the inside of the vehicle to the air conditioner passes through an inside of the return air space;
• and
• an exhaust air duct arranged in an inside of a space surrounded by the first lower side face plate, the third lower side face plate, and the closing plate and extending in the longitudinal direction of the underframe.