| 摘要 |
The present invention relates to a manhole ( 10 ) with a locking device, and more particular to a manhole with a locking device, which comprises a manhole frame ( 20 ) having a plurality of insertion slots ( 24 ) inwardly protruded from an inner circumferential surface thereof, each insertion slot ( 24 ) having a latching protrusion ( 26 ) formed in such a manner that a top surface of the insertion slots ( 24 ) is partially opened; a bearing member ( 30 ) having a female screw portion formed on the center thereof and a plurality of fastening pieces ( 36 ) radially formed outwardly from the outer circumferential edge thereof, so that the bearing member ( 30 ) is detachably fastened to the manhole frame ( 20 ); and a manhole cover ( 40 ) having a through-hole ( 41 ) centrally formed therein so that an upper portion of the vertical screw rod ( 42 ) is rotatably inserted into the through-hole ( 41 ), the vertical screw rod ( 42 ) having a male screw portion ( 45 ) formed on the lower portion thereof so as to be threadably fastened to the female screw portion ( 35 ) of the bearing member, a head portion ( 43 ) formed on the upper portion thereof so as to abut against an upside surface of the manhole cover ( 40 ), and a support portion ( 44 ) formed on the upper portion thereof so as to abut against an underside of the manhole cover ( 40 ), so that the manhole cover ( 40 ) is closed by rotating the head portion ( 43 ) of the vertical screw rod ( 42 ). Thus, in a case of the manhole ( 10 ) mounted on a vehicle road, the manhole cover ( 40 ) is prevented from being separated from the manhole frame ( 20 ) without permission by a vehicle running at a high speed as well as from frictional noise generated between the manhole cover ( 40 ) and the manhole frame ( 20 ). Further, in a case of the manhole ( 10 ) mounted on the waterside of a river, the manhole ( 10 ) maintains its watertightness and is readily opened and closed by an operator.
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