To efficiently perform piping operations and maintenance operations of the various pipings for a downpipe, a hose for an air conditioner, an electric wire, etc. without deteriorating an appearance, while suppressing adverse effects of heat insulation, sound insulation, etc. to the inside of a room.
An exterior wall 1 is formed of an exterior wall 3 using an exterior panel 7, and an interior wall 4 using an interior panel 21. A piping passage 31, which includes at least a vertical piping portion 30x vertically elongated through a space H selected from among an internal space H4 of the exterior panel 7, an exterior-panels-in-between space H1 between the adjacent external facing panels 7 and 7 or an interior-exterior-panels-in-between space H3 between the exterior panel 7 and the interior panel 21, is provided between the exterior wall 3 and the interior wall 4. The piping passage 31 has a double-pipe structure which comprises a guide pipe 32 fixed in the space H, and a flexible and seamless inner pipe 33 passing through the guide pipe 32.
JPH04202941A | 1992-07-23 | |||
JP2000328663A | 2000-11-28 | |||
JPS6084628U | 1985-06-11 |