| 摘要 |
PROBLEM TO BE SOLVED: To provide a gate door device capable of reducing the number of parts and facilitating assembly work. SOLUTION: This gate door device is provided with a fixed support column 33 erected fixedly on the ground surface, a cylindrical rotary body 34 fitted into the fixed support column 33 coaxially and rotatably through an upper automatic aligning roller bearing 51 and a lower conical roller bearing 55, and a gate door main body attached to the cylindrical rotary body. The fixed support column 33 has an upper holding base 38 storing and holding an automatic aligning roller bearing outer ring part 53 in its upper part and a lower holding base 40 holding a conical roller bearing inner ring part 56 in its lower part. The cylindrical rotary body 34 has a shaft part member 42 having a shaft part 42a fitted and fixed in an automatic aligning roller bearing inner ring part 52 and fixed to the cylindrical rotary body in its upper part and a ringlike member 43 fixed to the cylindrical rotary body to abut on a conical roller bearing outer ring part 57 in its lower part. COPYRIGHT: (C)2005,JPO&NCIPI
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