| 摘要 |
The present invention relates to a manhole cover assembly having a locking means which comprises a manhole frame, a manhole cover, a hinge (130) wherein the manhole frame and the manhole cover is held, and a locking part (140) fastening the manhole frame and the manhole cover. The locking part (140) having a circular arc shape, installed on the lower part of the manhole cover (120), is composed of a chuck nut (141) and a protrusion (142) of the manhole frame as shown in the Figure. The chuck nut (141) has C-shape with a long leg (141a) and a short leg (141b) which are prepared to be closed up. The protrusion (142) extending to the inside of a manhole frame (110) is combined by means of fitting into a clearance formed between the long leg (141a) and the short leg (141b). The present invention provides a manhole cover assembly having a locking means, so that a manhole cover can not be detached from a manhole frame, in case that a heavy weight vehicle passes thereon and a sewage flows backward. Therefore, a damage of the manhole cover assembly can be decreased, and also a noise caused by traffic loading and impact is not occurred. |
