| 摘要 |
PURPOSE: A bolt for fixing an inner cover of a manhole is provided to prevent damage to an inner cover due to impact and weight generated by the operation of a vehicle. CONSTITUTION: A bolt for fixing an inner cover(36) of a manhole comprises a pin(26), a groove(28), a nut(14), a joint(20), a band(22), and an inner cover water stop ring(38). The pin is coupled with a projection(32b), passing through outer circumference of the inner cover. The nut is inserted into the pin to be rotated and presses the inner cover. A joint part is projected from the upper side of the nut and to the both sides. The band is inserted into the circumference of the pin. The inner cover water stop ring inserted into the upper side of the projection. |
