| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a duct cover, which facilitates handling because of light weight in transportation, etc., which is hard to cause load collapse since the duct covers do not become bulky even if a large number of the duct covers are overlapped in the transportation, etc., and furthermore which is superior even when used under an inferior environment. <P>SOLUTION: The duct covers are molded into a rectangular plate shape. A plurality of nonslip projections 2 are provided on an upper surface, a plurality of reinforcing ribs 3a, 3b, 3c are provided on a lower surface, and handgrips 4 are provided at symmetrical positions of an edge end, respectively. Nonslip projections and the reinforcing ribs are provided so as to be alternately adjacent to each other in a plane view. The nonslip projections 4b are provided at the handgrips. A shock-absorbing board 5 is provided on the lower surface of each corner part (a). A recess 6 is provided on the upper surface of each corner part so as to correspond to the shock-absorbing board. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
