PURPOSE: To firmly fix upper side and lower side support members over many years.
CONSTITUTION: An upper cylinder 10 formed with a female screw 13 on the inner periphery is coupled from above with a lower cylinder 30 formed with a male screw 33 on the outer periphery, and the relative position is determined at the desired height. Notches 15 dividing the periphery into four are formed on the upper cylinder 10, portions of the notches 15 are made gradually thicker in thickness toward the lower section, and a male screw 14 is formed on the outer periphery. The female screw 21 on the inner periphery of a ring-shaped female screw member 20 is coupled with the male screw 14. When the female screw member 20 is rigidly rotated, the upper cylinder 10 fastens the outer periphery of the lower cylinder 30, and both are firmly fixed.
NEZU SUMIO
KATAYAMA TETSUYA
NAKANO KOICHI
