| 摘要 |
PROBLEM TO BE SOLVED: To provide a grating lid for a bicycle track which enables bicycles to safely run thereon by providing a lock device to the grating lid so that the grating lid does not come out even if general vehicles run on the grating lid attached to a drain gully installed in the bicycle track formed in a part of a roadway.SOLUTION: The lock device 20 mounted on a mounting base frame 12 attached to each of both end centers of the rear surface of the grating lid 3 put on a receiving frame 1 attached to a drain gully or a drain gutter includes a cylindrical body 21 fixed to the mounting base frame 12, a lock shaft 23 stored in the cylindrical body, a spring 29 for pressing the lock shaft 23 stored in the cylindrical body 21 so as to be advanced and retreated, and a pair of locking rings 31 for closing both ends of the cylindrical body 21. The rear ends of the lock shafts 23 of the lock devices 20 positioned at both ends of the grating lid 3 are connected to each other using a wire rope 36. |
