| 摘要 |
PURPOSE: A manhole lid for drainage easily separated is provided to facilitate the take-away and the fixation of the manhole lid while the manhole lid has elastic force and be adjusted in length in the state of being fixed in a manhole frame. CONSTITUTION: A manhole lid for drainage easily separated comprises; a manhole(10) installed in a road or a sidewalk; a manhole lid(20) covering an outlet of the manhole; a manhole frame(30); numerous drain holes(23) in elongated hole shape formed in the upside of the manhole lid at regular intervals in order that storm water is discharged to the ground through the manhole; and a length adjusting device which consists of the opened parts(25a,25b,25c) and closed parts(26a,26b,26c), generates elastic force in the case that external force is given to one side of the manhole lid and be adjusted in length. The manhole frame comprises; a supporting piece(31) projected out to be laid under the ground; numerous bolt passing holes(33) in which a bolt(32) or an anchor is bound; numerous supporting ribs(34) to strengthen the strength of the supporting piece(31); an inserting groove(36) in which a hand or a worker's tool is inserted; and a couple of locking grooves(35) to fix the manhole lid.
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