To provide a non-slip structure for a tread surface of an aluminum step board which makes it possible to pass safely, and a ferry bridge for a small ship using the aluminum step board.SOLUTION: An aluminum step board 2 has a predetermined material thickness and a predetermined material width, and is formed into a strip-shaped flat plate that is long in the vertical direction. A flat upper surface of the step board 2 forms a tread surface 3. On the upper surface of the step board 2, a large number of concave grooves 4 are provided to extend between front and rear edges of the step board 2 so as to prevent skidding at positions separated by a predetermined interval in the width direction, and an uneven surface is formed by the tread surface 3 and the concave grooves 4. The tread surface 3 is provided with innumerable scratch-like shallow streak-like grooves 6 that do not follow the walking direction so as to overlap each other.SELECTED DRAWING: Figure 3
アルミニウム製歩み板の踏み面滑り止め構造及びアルミニウム製歩み板を用いた小型船舶用渡船橋梁
2022-07-06
Patent
Elektronische Ressource
Japanisch