| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a tent sheet that is easy to manufacture, and can be repeatedly used.SOLUTION: A tent sheet 10 covers the inside of a pit 1 from above. The tent sheet 10 includes a flexible sheet member 20 in a substantially conic shape which has been subjected to waterproof processing, an annular suspension member 30 which is provided at a top part of the sheet member 20, and a reinforcement belt 40 which is provided on the reverse surface of the sheet member 20, and extends radially from the top part to the outer edge of the sheet member 20. Consequently, an opening/closing device which opens and closes the sheet is not necessary unlike before, so the tent sheet is easy to manufacture and can be repeatedly used.</p> |
