To provide an extended formwork and a concrete wall structure using such extended formwork capable of firmly preventing water from entering into an electric wiring embedded box without being affected by working ability.
This concrete wall structure has a through hole 26 formed in the position of a concrete formwork 12 corresponding to the position of an embedded box 16 embedded in a concrete wall 14 placed by the concrete formwork 12. An joint frame 10 is arranged inside the through hole 26 so as to abut on the front of the embedded box 16 and a wall outlet parts 30 and the like are furnished. Thus when surplus water inside the concrete wall 14 flows down inside a water conveying layer 12a of the hollow formwork 12 and reaches the upper part of the joint frame 10, the surplus water flows along the outside circumference of the hollow formwork body 18 and is guided to the lower part. At this time, the water flowing along the outside circumference of the hollow formwark body 18 is intercepted by two ribs 18c and flows down between the ribs 18c.
KOBAYASHI MASAKI
KAWAGUCHI NOBUHIRO
YAMASHITA MASAMI
IWANAMI KOICHI
MIWA AKIHIRO
KAJIWARA HIDEKI
WATANABE RIKUO
TAKADA KAZUTAKA
HORI TOMOAKI
TODA CONSTRUCTION
KUBOTA KK
Next Patent: CEILING FLOOR STRUCTURE AND ITS CONSTRUCTING METHOD