Door apparatus of railcar

A door apparatus of a railcar, the door apparatus comprising:

• a side sliding door that opens and closes a door opening of a side bodyshell of the railcar;
• a first elastic structure attached to a door end of the side sliding door in a vertical direction;
• a second elastic structure that is opposed to the first elastic structure, the second elastic structure being in a non-contact state with respect to the first elastic structure when the side sliding door is in a fully closed state;
• and
• an elastic fin separable from the first elastic structure and the second elastic structure, wherein:
• the first elastic structure includes a first base and a first projecting wall projecting from the first base toward the second elastic structure;
• the second elastic structure includes a second base and a second projecting wall projecting from the second base toward the first elastic structure;
• the first elastic structure further includes:
• a convex portion projecting from an end portion of the first base in a thickness direction of the side sliding door toward a tip of the second projecting wall while being spaced apart from the first projecting wall in the thickness direction, and
• an engaged groove defined by the first base, the first projecting wall, and the convex portion;
• when the side sliding door is in the fully closed state, there is a space between the first elastic structure and the second elastic structure, and the first projecting wall and the second projecting wall are located so as to overlap each other when viewed in a thickness direction of the side sliding door;
• the elastic fin includes:
• an attaching portion which is detachably attached to the engaged groove, and
• a fin portion projecting from the attaching portion;
• and
• when the side sliding door is in the fully closed state, the fin portion contacts the second elastic structure.