| 摘要 |
PROBLEM TO BE SOLVED: To restrain small space distance between the upper end of a movable wall and a ceiling, and the parting size of a ceiling rail to prevent a hanging bolt from loosening, by threadedly engaging the hanging bolt with the thread hole of the socket on the upper end of the movable wall, and obstructing rotation of the hanging bolt. SOLUTION: A hanging bolt 6 is hung down on the center of a main body 4, flat faces 7, 7 are formed on the opposite positions, the hanging bolt 6 is insered through the hole 8 of a washer 2, and rotation of the washer 2 fitted to the hanging bolt 6 is obstructed. Meanwhile, a socket 3 is fixed to the upper end of a movable wall and vertically let stand, and a thread hole 10 is formed on the center, a lock piece 11 is let stand on the outside of the upper end of the socket 3, and the inside of the lock piece 11 is formed into a flat face 12. The washer 2 fitted to the hanging bolt 6 is placed on the upper end 13 of the socket 3 and arranged, the side 14 of the washer 2 is in an approaching or abutting state with the inside flat face 12 of the lock piece 11. Hereby, by interposing the washer 2 between the socket 3 and the hanging bolt 6 threadedly engaged with the thread hole 10 of the socket 3, the hanging bolt 6 can be prevented from loosening.
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