To improve the connection strength and the sealability by using a sealant formed of the thermal fusion resin with a built-in heating wire and each member in which a thermal fusion resin layer is formed on a joined part.
A polyethylene layer 3 is formed on an upper edge 2a of a waterproof pan 2 of a unit bathroom 1, and a polyethylene layer 3 is formed on a lower edge 4a of a wall panel 4. A sealant 5 is formed of polyethylene, and a nichrome wire 6 is built in the sealant 5. The voltage from a power source is applied to lead wires 6a, 6b to heat the nichrome wire 6 and fuse the polyethylene layer 3 on the waterproof pan 2 side with the polyethylene layer on the wall panel 4 side with the sealant 5 as the medium. The lead terminals 6a, 6b after execution may be cut so as not to be exposed outside, or accommodated in a recessed part formed in a part of the sealant 5 and the recessed part may be covered. The sealing through the fusion is achieved completely to firmly connect each member.
TAKAHASHI KEIJI
ITO YOSHIHIKO
SATO YOKO
