| 摘要 |
PROBLEM TO BE SOLVED: To secure mutual stopping of both cylindrical parts put in the abutting state when the cylindrical parts are disposed on the upper and lower sides in the abutting state by forming an engagement part on the top of the cylindrical part of a unit member having cylindrical members of the same height integrally projected on the base surface of the basement part. SOLUTION: This unit member A is formed by integrally projecting cylindrical parts 2 of the same height on the base surface of a basement part 1 presenting a rectangle, and the top parts of the cylindrical parts 2 are provided with a projecting part and a recessed part in which the projecting part is fitted so that when the cylindrical parts 2 abut on each other, the abutting parts positioned on the upper and lower sides lock with each other. When the unit members A are turned in plane by a 180-degree arc to abut on each other, the projecting part and the recessed part are opposite to each other, and in such a state, they are superposed one on the other so that the projecting part and the recessed part are locked. Since an engagement part 3 is formed to connect the cylindrical parts 2 to each other, the connection work can be quickened without another part.
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