To shade a clearance generated on a hinge side at low cost in a good appearance so as to improve safety by fixing one end of a shade plate which shades the clearance generated when a door body is opened and is flexible on the door body and inserting a free end side of the shade plate into a pocket part provided in a door mounting part in such a manner that it can be pulled out freely.

A door body 2 which opens and closes an inlet l1 such as entrance is attached to a door mounting part 3 of the inlet 1 by using a hinge 4 in such a manner that it can turn. The door body 2 is provided with a pocket part 5 which is positioned on a hinge 4 side, is opened sideways in a plate face part 2a on the opposite side to a mounting face side of the hinge 4, and is long in the vertical direction. One end 6a of a flexible shade plate 6 formed by a thin plate made of metal and plastic is fixed to a plate face part 3a of the door mounting part 3, and a free end side 6b of the shade plate 6 is inserted into the pocket part 5 in such a manner that it can be pulled in and out freely. The shade plate 6 is pulled out by the opening operation of the door body 2 and is stored by its closing operation. Consequently, it is possible to eliminate a danger that a finger is caught in the door when it is closed.