| 摘要 |
PROBLEM TO BE SOLVED: To provide a gymnasium in which a judo hall can be easily formed or removed and four peripheral fighting sections can be reversibly exchanged to one central fighting section. SOLUTION: If a gymnasium is provided with a transferable and fixable tatami mat unit which is provided with fixed tatami mat units 1, 2 and can be leviated, a transferring and fixing movable tatami mat unit which is provided with small fixing tatami mat units 4b, or 7b and vertically movable and rotatable small movable tatami units 4b, 7b and can be levitated, a transferring and fixing tatami mat unit which is provided with small fixing tatami mat units 5a or 6a, a vertically movable and rotatable small movable tatami units 5b, or 6b, small fixing tatami mat units 5a', 6a' and can be levitated, and a vertically movable container cace housing these units and lowering down to the under face of a floor, the judo hall 1 can be easily installed or removed by levitating the units on the floor and transferring them and further the four peripheral fighting sections 8 can be reversibly exchanged to one central fighting section 9 by only raising respective small movable units and turning by 90 degrees and putting them down.
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