The present design relates to a manhole assembly is installed in the road, opening the ability to to open easily when you open the manhole cover for lock and maintenance to prevent heavy trucks even race or sewage back flow by heavy rains manhole cover is not leaving the purpose is to provide a manhole assembly equipped therein.
Bolt hole in the center (101), and grooves (102) is disk (disk) in the form of a manhole cover (10) formed along the outer circumferential surface; Top is formed on a manhole cover base jaw supporting the manhole cover (10) 201, the bottom has a manhole guides supporting the jaw to support the manhole guides (30) (202) is formed, around, the more the bolt holes 2 203 is a ring (ring) form of the manhole frame 20 and which forms; Consists of a + shaped one is supported so that it does not lift up by the located below the manhole guide supporting jaw 202 of the both ends are manhole frame 20, and the other manhole there is in the bolt so that both ends can be adjusted in length manhole cover retention arm which is adapted to close contact with the inner peripheral surface of the frame 20 (30) and; By a bolt 302 is secured rotatably to the manhole frame 20 fixed so as not to leave the manhole cover 10, the radius the larger is the length to be inserted into the groove formed on the manhole cover, the smaller is manhole as including a length of the manhole cover locking key 40 will not be inserted into the cap, the manhole cover (10) is the one hand is fixed to the manhole cover retention arm 30 by a bolt, on the other hand, the manhole cover locking key (40 ) in the manhole assembly characterized in that fixed to the manhole frame 20 by.
According to the present invention, even if the sewage flowing back into the heavy truck racing or heavy rain manhole cover is not leaving, when you open a manhole for maintenance manhole assembly is provided that it can be easily opened.