PURPOSE: To improve fireproofness, heat insulation, waterproofness, etc., by providing a side-wall to four side-edges of back batten having a reverse T-shaped section, forming nicks on diagonal positions, and providing overlapping projection pieces and bearing projection pieces connecting to a panel to fill with a joint member.
CONSTITUTION: A back batten A consisting of a reverse T-shaped horizontal fixed piece 1 of a metal plate and a riser piece 2 is constituted of a face 3 including a facing surface 4, a heat insulating and sound proofing heartwood 10 and a rear member 11. A set of nicks 7 are formed on diagonal positions of four corners, and a projection piece 6 divided into an overlapping projection piece 8 and bearing projection piece 9 is provided to each of the nicks. After that, the back batten A is fixed to the side end between panels B through the riser piece 2, and a coupling piece of the panels B is fixed by superposing the overlapping projection piece 8 upon the bearing projection piece 9. According to the constitution, fireproofness, soundproofness, etc., can be promoted by interposition of the back batten A.
AOYANAGI MITSUYOSHI
SAITO MINORU
NIIZEKI TAKANOBU
IMADA HIROAKI
