| 摘要 |
PURPOSE: A grating with an S-shaped hinge structure which can be dismantled by a lever action is provided to structurally reinforce the grating without damage to a cover body. CONSTITUTION: A grating with an S-shaped hinge structure which can be dismantled by a lever action is composed as follows. Hinge protrusions are fixed to a position where is eccentrically away from a center line(C.L). S-shaped hinge grooves, corresponding to the hinge protrusions, are formed to be dismantled by a lever action. A cover body(110) can be rotated at an angle of 120-145 degrees to be easily dismantled. |
