| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily remove a nail which is left on a box cover, after placing concrete to be fixed in a molded frame. <P>SOLUTION: This box device is provided with a box 2 embedded in the concrete and a box cover 11, placed on the front of the box 2. The box cover 11 is provided with an opening 13 ; a nail inserting portion 16 for inserting a nail 21, from the back to fix it on the molded frame with the nail 21, in a condition where the opening 13 is made to abut against the molded frame; a nail pull-out portion 17, which communicates with the nail inserting portion 16 and the opening 13, and is used for pulling out the nail 21 inserted in the nail inserting portion 16 to the opening 13 side. <P>COPYRIGHT: (C)2004,JPO |
