| 摘要 |
PROBLEM TO BE SOLVED: To provide a water-tight section structure of a cylinder gate having hardly need to execute replacement work of sealant and having a small amount of water leakage. SOLUTION: A water-tight section structure between cylinder bodies in a cylinder gate formed by successively fitting a plurality of cylinder bodies thereinto in an insertable manner forms sealant 13 constituted of a hard material such as bronze casting or the like and placed between the outside cylinder body 11 and the inside cylinder body, three inside circular groove sections 14 are formed on the inside surface opposed to the outside of the inside cylinder body of the sealant 13, at the same time, two outside circular groove sections 15 are formed on the outside surface opposed to the inside of the outside cylinder body, upper circular guide bearing plates 16 inserted into the outside circular groove sections 15 to guide and bear the sealant 13 and a lower circular guide bearing plate 17 bearing the whole sealant 13 are projected to the inside of the outside cylinder body 11, and a dust proofing hardware 21 is placed on the sealant 13 to prevent the incursion of dust into a gap D between both cylinder bodies 11 and 12.
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