| 摘要 |
PROBLEM TO BE SOLVED: To prevent a door body from being locked by freezing or snowfall by a simple structure. SOLUTION: This turnover prevention device 20 comprises a heater 21 installed on a foundation, a cover plate 22 installed in the clearance 27 thereof from the foundation 2, and an engagement member 25 fixed to the leg part 12 of the door body. The engagement member 25 is fixed by advancing its tip part into the clearance 27 formed under the cover plate 22. The leg part 12 of the door body comprises a wheel 13, and the wheel 13 is moved on a rail 15 laid down on the foundation 2 to open/close the door body. The heater 21 and the cover plate 22 are disposed along the moving route of the wheel 13. COPYRIGHT: (C)2006,JPO&NCIPI
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