SOLUTION: An underground multi-purpose duct 1 comprises a conduit block 2 and a branch block 8. The conduit block 2 where plural pipes 3, 3 are placed and arranged at spaces along the longitudinal direction on a frame formed by reinforcing steel or the like and frame, and the branch ...
SOLUTION: An underground multi-purpose duct 1 comprises a conduit block 2 and a branch block 8. The conduit block 2 where plural pipes 3, 3 are placed and arranged at spaces along the longitudinal direction on a frame formed by reinforcing steel or the like and frame, and the branch ...
PROBLEM TO BE SOLVED: To improve further the efficiency of an installation process in which factory-made underground multi-purpose duct blocks by which a shortest lead time at the installation site of an underground multi-purpose duct by which wires which are installed above the ground and ...
PURPOSE: To connect a lead wire transmitting electric power or electric signals into the soil and bury it under the ground while easily and surely attaining the electrical connection.KAMEI TAKAO亀井 隆雄TATSUMI MASAKUNI辰巳 方邦KINOSHITA FUMIO
The duct structural unit 1 is once cut 8 in directions crossing the longitudinal underground multi-purpose direction. The cut parts 8 and 8 are joined with each other again to form the underground multi-purpose duct structural unit 1 and the structural units 1 are successively joined and buried...
PURPOSE: To connect a lead wire transmitting electric power or electric signals into the soil and bury it under the ground while easily and surely attaining the electrical connection. ;CONSTITUTION: Terminal members 24, 25 are fixed at both ends 14a, 14b of cylinders 13. The terminal members ...