To provide a gate door which facilitates and ensures fixture of a corner portion of a long member forming a frame of the gate.
A frame 10 of the gate door is formed into a rectangular shape by vertically and horizontally building long members 20, 40, 50 which each have hollow portions and have both ends thereof opened. Corner portions of the frame 10 are formed by butting ends of the horizontal long members 40, 50 on inner side wall ends 22 of the vertical long member 20. Reinforcing members 45, 46, 55, 56 are inserted into the hollow portions of the horizontal long members, respectively, in a manner extending between both the ends of the horizontal long members, and the reinforcing members are rigidly connected via reinforcing plates 70, 71, inserted into respective ends of the vertical long member, to the vertical long member, by means of screws 60, 61, 62, 63, respectively.
IKAWA TAKUYA
SASAOKA TORU
