| 摘要 |
PROBLEM TO BE SOLVED: To prevent the malfunction of a vibration-proof box for a concrete sleeper particularly used in a lighting section regarding the vibration-roof box as an elastic bearing device for the concrete sleeper for a railway rail installed on a concrete ballast. SOLUTION: In the vibration-proof box, which has a bottom plate and an outer edge wall erected from the outer edge of the bottom plate and side walls erected from the side edges of the bottom plate and has constitution in which the concrete sleeper is borne through a vibration-proof pad installed on the top face of the bottom plate, a discharging passage extending in the sleeper direction is mounted on the surface of the bottom plate, at least one discharge opening is formed to the bottom plate and/or the walls erected from the side edges of the bottom plate, and the discharging passage and the discharge opening are communicated. The bottom plate is inclined towards the discharging opening.
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