| 摘要 |
The present invention relates to theft-proof gratings, and has a purpose to prevent the theft of gratings by integrally fastening the gratings (mutually fastening the gratings adjacent to each other) installed at a gutter at the side of a road. According to the present invention, the theft-proof gratings consecutively installed at the gutter, and integrally and adjacently connected to each other by the media of fastening protrusions and fastening grooves comprise: lattice-shaped grating main bodies (20); and the fastening protrusions (30) and the fastening grooves (40) formed at both sides of the grating main bodies respectively, wherein each of the fastening protrusions includes: a connection part (31) connected to the grating body; and a locking part (32) formed at the end of the connecting part and having a cross-sectional area larger than the cross-sectional area of the connection part, and each of the fastening groove includes: an insertion part (41) with a size to have the locking part (32) inserted therein; and a holding part (42) having a size smaller than the size of the locking part, formed to be extended from the insertion part, and locking the locking part. |
