| 摘要 |
PURPOSE:To enhance the gas-tightness by securing a frame to the peripheral part of a ceiling wall and the top end part of a side wall with screws or the like, and by forming the frame in a U-like shape so as to form a stepped pressing part at the top edge of an opening. CONSTITUTION:A U-like shape frame 8 secured to the top end part of a side wall 2 defines therein an opening 10 facing a bath room 9, for attaching a packing, and a stepped pressing part 11 thereof defines a groove 12 for filling a seam material. Then, an upright wall 8a of the frame 8 is overlapped with a bent piece 1a of a ceiling wall 1, and a horizontal wall 8b of the frame 8 supports the horizontal outer periphery of the ceiling wall 1. Then, the upright wall 8 is fixed to the bent piece 1a by fixing screws 4. Then, a packing 5 is press-fit in the opening 10 in the frame 8, and a seal material 3 is filled in a groove 12 defined by the stepped pressing part 11. With this arrangement, it is possible to enhance the air-tightness of the bath room. |
